drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 1999 - 2018 Intel Corporation. */
   3
   4 #include <linux/types.h>
   5 #include <linux/module.h>
   6 #include <linux/pci.h>
   7 #include <linux/netdevice.h>
   8 #include <linux/vmalloc.h>
   9 #include <linux/string.h>
  10 #include <linux/in.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/ip.h>
  13 #include <linux/tcp.h>
  14 #include <linux/sctp.h>
  15 #include <linux/pkt_sched.h>
  16 #include <linux/ipv6.h>
  17 #include <linux/slab.h>
  18 #include <net/checksum.h>
  19 #include <net/ip6_checksum.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/ethtool.h>
  22 #include <linux/if.h>
  23 #include <linux/if_vlan.h>
  24 #include <linux/if_macvlan.h>
  25 #include <linux/if_bridge.h>
  26 #include <linux/prefetch.h>
  27 #include <linux/bpf.h>
  28 #include <linux/bpf_trace.h>
  29 #include <linux/atomic.h>
  30 #include <linux/numa.h>
  31 #include <generated/utsrelease.h>
  32 #include <scsi/fc/fc_fcoe.h>
  33 #include <net/udp_tunnel.h>
  34 #include <net/pkt_cls.h>
  35 #include <net/tc_act/tc_gact.h>
  36 #include <net/tc_act/tc_mirred.h>
  37 #include <net/vxlan.h>
  38 #include <net/mpls.h>
  39 #include <net/xdp_sock_drv.h>
  40 #include <net/xfrm.h>
  41
  42 #include "ixgbe.h"
  43 #include "ixgbe_common.h"
  44 #include "ixgbe_dcb_82599.h"
  45 #include "ixgbe_phy.h"
  46 #include "ixgbe_sriov.h"
  47 #include "ixgbe_model.h"
  48 #include "ixgbe_txrx_common.h"
  49
  50 char ixgbe_driver_name[] = "ixgbe";
  51 static const char ixgbe_driver_string[] =
  52                               "Intel(R) 10 Gigabit PCI Express Network Driver";
  53 #ifdef IXGBE_FCOE
  54 char ixgbe_default_device_descr[] =
  55                               "Intel(R) 10 Gigabit Network Connection";
  56 #else
  57 static char ixgbe_default_device_descr[] =
  58                               "Intel(R) 10 Gigabit Network Connection";
  59 #endif
  60 static const char ixgbe_copyright[] =
  61                                 "Copyright (c) 1999-2016 Intel Corporation.";
  62
  63 static const char ixgbe_overheat_msg[] = "Network adapter has been stopped because it has over heated. Restart the computer. If the problem persists, power off the system and replace the adapter";
  64
  65 static const struct ixgbe_info *ixgbe_info_tbl[] = {
  66         [board_82598]           = &ixgbe_82598_info,
  67         [board_82599]           = &ixgbe_82599_info,
  68         [board_X540]            = &ixgbe_X540_info,
  69         [board_X550]            = &ixgbe_X550_info,
  70         [board_X550EM_x]        = &ixgbe_X550EM_x_info,
  71         [board_x550em_x_fw]     = &ixgbe_x550em_x_fw_info,
  72         [board_x550em_a]        = &ixgbe_x550em_a_info,
  73         [board_x550em_a_fw]     = &ixgbe_x550em_a_fw_info,
  74 };
  75
  76 /* ixgbe_pci_tbl - PCI Device ID Table
  77  *
  78  * Wildcard entries (PCI_ANY_ID) should come last
  79  * Last entry must be all 0s
  80  *
  81  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  82  *   Class, Class Mask, private data (not used) }
  83  */
  84 static const struct pci_device_id ixgbe_pci_tbl[] = {
  85         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598), board_82598 },
  86         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT), board_82598 },
  87         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT), board_82598 },
  88         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT), board_82598 },
  89         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2), board_82598 },
  90         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4), board_82598 },
  91         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT), board_82598 },
  92         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT), board_82598 },
  93         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM), board_82598 },
  94         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR), board_82598 },
  95         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM), board_82598 },
  96         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX), board_82598 },
  97         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4), board_82599 },
  98         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM), board_82599 },
  99         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR), board_82599 },
 100         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP), board_82599 },
 101         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM), board_82599 },
 102         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ), board_82599 },
 103         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4), board_82599 },
 104         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_BACKPLANE_FCOE), board_82599 },
 105         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_FCOE), board_82599 },
 106         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM), board_82599 },
 107         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE), board_82599 },
 108         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T), board_X540 },
 109         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF2), board_82599 },
 110         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_LS), board_82599 },
 111         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_QSFP_SF_QP), board_82599 },
 112         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599EN_SFP), board_82599 },
 113         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF_QP), board_82599 },
 114         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T1), board_X540 },
 115         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550T), board_X550},
 116         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550T1), board_X550},
 117         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_KX4), board_X550EM_x},
 118         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_XFI), board_X550EM_x},
 119         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_KR), board_X550EM_x},
 120         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_10G_T), board_X550EM_x},
 121         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_SFP), board_X550EM_x},
 122         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_1G_T), board_x550em_x_fw},
 123         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_KR), board_x550em_a },
 124         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_KR_L), board_x550em_a },
 125         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SFP_N), board_x550em_a },
 126         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SGMII), board_x550em_a },
 127         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SGMII_L), board_x550em_a },
 128         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_10G_T), board_x550em_a},
 129         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SFP), board_x550em_a },
 130         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_1G_T), board_x550em_a_fw },
 131         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_1G_T_L), board_x550em_a_fw },
 132         /* required last entry */
 133         {0, }
 134 };
 135 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
 136
 137 #ifdef CONFIG_IXGBE_DCA
 138 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
 139                             void *p);
 140 static struct notifier_block dca_notifier = {
 141         .notifier_call = ixgbe_notify_dca,
 142         .next          = NULL,
 143         .priority      = 0
 144 };
 145 #endif
 146
 147 #ifdef CONFIG_PCI_IOV
 148 static unsigned int max_vfs;
 149 module_param(max_vfs, uint, 0);
 150 MODULE_PARM_DESC(max_vfs,
 151                  "Maximum number of virtual functions to allocate per physical function - default is zero and maximum value is 63. (Deprecated)");
 152 #endif /* CONFIG_PCI_IOV */
 153
 154 static unsigned int allow_unsupported_sfp;
 155 module_param(allow_unsupported_sfp, uint, 0);
 156 MODULE_PARM_DESC(allow_unsupported_sfp,
 157                  "Allow unsupported and untested SFP+ modules on 82599-based adapters");
 158
 159 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
 160 static int debug = -1;
 161 module_param(debug, int, 0);
 162 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 163
 164 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 165 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
 166 MODULE_LICENSE("GPL v2");
 167
 168 static struct workqueue_struct *ixgbe_wq;
 169
 170 static bool ixgbe_check_cfg_remove(struct ixgbe_hw *hw, struct pci_dev *pdev);
 171 static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter *);
 172
 173 static const struct net_device_ops ixgbe_netdev_ops;
 174
 175 static bool netif_is_ixgbe(struct net_device *dev)
 176 {
 177         return dev && (dev->netdev_ops == &ixgbe_netdev_ops);
 178 }
 179
 180 static int ixgbe_read_pci_cfg_word_parent(struct ixgbe_adapter *adapter,
 181                                           u32 reg, u16 *value)
 182 {
 183         struct pci_dev *parent_dev;
 184         struct pci_bus *parent_bus;
 185
 186         parent_bus = adapter->pdev->bus->parent;
 187         if (!parent_bus)
 188                 return -1;
 189
 190         parent_dev = parent_bus->self;
 191         if (!parent_dev)
 192                 return -1;
 193
 194         if (!pci_is_pcie(parent_dev))
 195                 return -1;
 196
 197         pcie_capability_read_word(parent_dev, reg, value);
 198         if (*value == IXGBE_FAILED_READ_CFG_WORD &&
 199             ixgbe_check_cfg_remove(&adapter->hw, parent_dev))
 200                 return -1;
 201         return 0;
 202 }
 203
 204 static s32 ixgbe_get_parent_bus_info(struct ixgbe_adapter *adapter)
 205 {
 206         struct ixgbe_hw *hw = &adapter->hw;
 207         u16 link_status = 0;
 208         int err;
 209
 210         hw->bus.type = ixgbe_bus_type_pci_express;
 211
 212         /* Get the negotiated link width and speed from PCI config space of the
 213          * parent, as this device is behind a switch
 214          */
 215         err = ixgbe_read_pci_cfg_word_parent(adapter, 18, &link_status);
 216
 217         /* assume caller will handle error case */
 218         if (err)
 219                 return err;
 220
 221         hw->bus.width = ixgbe_convert_bus_width(link_status);
 222         hw->bus.speed = ixgbe_convert_bus_speed(link_status);
 223
 224         return 0;
 225 }
 226
 227 /**
 228  * ixgbe_pcie_from_parent - Determine whether PCIe info should come from parent
 229  * @hw: hw specific details
 230  *
 231  * This function is used by probe to determine whether a device's PCI-Express
 232  * bandwidth details should be gathered from the parent bus instead of from the
 233  * device. Used to ensure that various locations all have the correct device ID
 234  * checks.
 235  */
 236 static inline bool ixgbe_pcie_from_parent(struct ixgbe_hw *hw)
 237 {
 238         switch (hw->device_id) {
 239         case IXGBE_DEV_ID_82599_SFP_SF_QP:
 240         case IXGBE_DEV_ID_82599_QSFP_SF_QP:
 241                 return true;
 242         default:
 243                 return false;
 244         }
 245 }
 246
 247 static void ixgbe_check_minimum_link(struct ixgbe_adapter *adapter,
 248                                      int expected_gts)
 249 {
 250         struct ixgbe_hw *hw = &adapter->hw;
 251         struct pci_dev *pdev;
 252
 253         /* Some devices are not connected over PCIe and thus do not negotiate
 254          * speed. These devices do not have valid bus info, and thus any report
 255          * we generate may not be correct.
 256          */
 257         if (hw->bus.type == ixgbe_bus_type_internal)
 258                 return;
 259
 260         /* determine whether to use the parent device */
 261         if (ixgbe_pcie_from_parent(&adapter->hw))
 262                 pdev = adapter->pdev->bus->parent->self;
 263         else
 264                 pdev = adapter->pdev;
 265
 266         pcie_print_link_status(pdev);
 267 }
 268
 269 static void ixgbe_service_event_schedule(struct ixgbe_adapter *adapter)
 270 {
 271         if (!test_bit(__IXGBE_DOWN, &adapter->state) &&
 272             !test_bit(__IXGBE_REMOVING, &adapter->state) &&
 273             !test_and_set_bit(__IXGBE_SERVICE_SCHED, &adapter->state))
 274                 queue_work(ixgbe_wq, &adapter->service_task);
 275 }
 276
 277 static void ixgbe_remove_adapter(struct ixgbe_hw *hw)
 278 {
 279         struct ixgbe_adapter *adapter = hw->back;
 280
 281         if (!hw->hw_addr)
 282                 return;
 283         hw->hw_addr = NULL;
 284         e_dev_err("Adapter removed\n");
 285         if (test_bit(__IXGBE_SERVICE_INITED, &adapter->state))
 286                 ixgbe_service_event_schedule(adapter);
 287 }
 288
 289 static u32 ixgbe_check_remove(struct ixgbe_hw *hw, u32 reg)
 290 {
 291         u8 __iomem *reg_addr;
 292         u32 value;
 293         int i;
 294
 295         reg_addr = READ_ONCE(hw->hw_addr);
 296         if (ixgbe_removed(reg_addr))
 297                 return IXGBE_FAILED_READ_REG;
 298
 299         /* Register read of 0xFFFFFFF can indicate the adapter has been removed,
 300          * so perform several status register reads to determine if the adapter
 301          * has been removed.
 302          */
 303         for (i = 0; i < IXGBE_FAILED_READ_RETRIES; i++) {
 304                 value = readl(reg_addr + IXGBE_STATUS);
 305                 if (value != IXGBE_FAILED_READ_REG)
 306                         break;
 307                 mdelay(3);
 308         }
 309
 310         if (value == IXGBE_FAILED_READ_REG)
 311                 ixgbe_remove_adapter(hw);
 312         else
 313                 value = readl(reg_addr + reg);
 314         return value;
 315 }
 316
 317 /**
 318  * ixgbe_read_reg - Read from device register
 319  * @hw: hw specific details
 320  * @reg: offset of register to read
 321  *
 322  * Returns : value read or IXGBE_FAILED_READ_REG if removed
 323  *
 324  * This function is used to read device registers. It checks for device
 325  * removal by confirming any read that returns all ones by checking the
 326  * status register value for all ones. This function avoids reading from
 327  * the hardware if a removal was previously detected in which case it
 328  * returns IXGBE_FAILED_READ_REG (all ones).
 329  */
 330 u32 ixgbe_read_reg(struct ixgbe_hw *hw, u32 reg)
 331 {
 332         u8 __iomem *reg_addr = READ_ONCE(hw->hw_addr);
 333         u32 value;
 334
 335         if (ixgbe_removed(reg_addr))
 336                 return IXGBE_FAILED_READ_REG;
 337         if (unlikely(hw->phy.nw_mng_if_sel &
 338                      IXGBE_NW_MNG_IF_SEL_SGMII_ENABLE)) {
 339                 struct ixgbe_adapter *adapter;
 340                 int i;
 341
 342                 for (i = 0; i < 200; ++i) {
 343                         value = readl(reg_addr + IXGBE_MAC_SGMII_BUSY);
 344                         if (likely(!value))
 345                                 goto writes_completed;
 346                         if (value == IXGBE_FAILED_READ_REG) {
 347                                 ixgbe_remove_adapter(hw);
 348                                 return IXGBE_FAILED_READ_REG;
 349                         }
 350                         udelay(5);
 351                 }
 352
 353                 adapter = hw->back;
 354                 e_warn(hw, "register writes incomplete %08x\n", value);
 355         }
 356
 357 writes_completed:
 358         value = readl(reg_addr + reg);
 359         if (unlikely(value == IXGBE_FAILED_READ_REG))
 360                 value = ixgbe_check_remove(hw, reg);
 361         return value;
 362 }
 363
 364 static bool ixgbe_check_cfg_remove(struct ixgbe_hw *hw, struct pci_dev *pdev)
 365 {
 366         u16 value;
 367
 368         pci_read_config_word(pdev, PCI_VENDOR_ID, &value);
 369         if (value == IXGBE_FAILED_READ_CFG_WORD) {
 370                 ixgbe_remove_adapter(hw);
 371                 return true;
 372         }
 373         return false;
 374 }
 375
 376 u16 ixgbe_read_pci_cfg_word(struct ixgbe_hw *hw, u32 reg)
 377 {
 378         struct ixgbe_adapter *adapter = hw->back;
 379         u16 value;
 380
 381         if (ixgbe_removed(hw->hw_addr))
 382                 return IXGBE_FAILED_READ_CFG_WORD;
 383         pci_read_config_word(adapter->pdev, reg, &value);
 384         if (value == IXGBE_FAILED_READ_CFG_WORD &&
 385             ixgbe_check_cfg_remove(hw, adapter->pdev))
 386                 return IXGBE_FAILED_READ_CFG_WORD;
 387         return value;
 388 }
 389
 390 #ifdef CONFIG_PCI_IOV
 391 static u32 ixgbe_read_pci_cfg_dword(struct ixgbe_hw *hw, u32 reg)
 392 {
 393         struct ixgbe_adapter *adapter = hw->back;
 394         u32 value;
 395
 396         if (ixgbe_removed(hw->hw_addr))
 397                 return IXGBE_FAILED_READ_CFG_DWORD;
 398         pci_read_config_dword(adapter->pdev, reg, &value);
 399         if (value == IXGBE_FAILED_READ_CFG_DWORD &&
 400             ixgbe_check_cfg_remove(hw, adapter->pdev))
 401                 return IXGBE_FAILED_READ_CFG_DWORD;
 402         return value;
 403 }
 404 #endif /* CONFIG_PCI_IOV */
 405
 406 void ixgbe_write_pci_cfg_word(struct ixgbe_hw *hw, u32 reg, u16 value)
 407 {
 408         struct ixgbe_adapter *adapter = hw->back;
 409
 410         if (ixgbe_removed(hw->hw_addr))
 411                 return;
 412         pci_write_config_word(adapter->pdev, reg, value);
 413 }
 414
 415 static void ixgbe_service_event_complete(struct ixgbe_adapter *adapter)
 416 {
 417         BUG_ON(!test_bit(__IXGBE_SERVICE_SCHED, &adapter->state));
 418
 419         /* flush memory to make sure state is correct before next watchdog */
 420         smp_mb__before_atomic();
 421         clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
 422 }
 423
 424 struct ixgbe_reg_info {
 425         u32 ofs;
 426         char *name;
 427 };
 428
 429 static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = {
 430
 431         /* General Registers */
 432         {IXGBE_CTRL, "CTRL"},
 433         {IXGBE_STATUS, "STATUS"},
 434         {IXGBE_CTRL_EXT, "CTRL_EXT"},
 435
 436         /* Interrupt Registers */
 437         {IXGBE_EICR, "EICR"},
 438
 439         /* RX Registers */
 440         {IXGBE_SRRCTL(0), "SRRCTL"},
 441         {IXGBE_DCA_RXCTRL(0), "DRXCTL"},
 442         {IXGBE_RDLEN(0), "RDLEN"},
 443         {IXGBE_RDH(0), "RDH"},
 444         {IXGBE_RDT(0), "RDT"},
 445         {IXGBE_RXDCTL(0), "RXDCTL"},
 446         {IXGBE_RDBAL(0), "RDBAL"},
 447         {IXGBE_RDBAH(0), "RDBAH"},
 448
 449         /* TX Registers */
 450         {IXGBE_TDBAL(0), "TDBAL"},
 451         {IXGBE_TDBAH(0), "TDBAH"},
 452         {IXGBE_TDLEN(0), "TDLEN"},
 453         {IXGBE_TDH(0), "TDH"},
 454         {IXGBE_TDT(0), "TDT"},
 455         {IXGBE_TXDCTL(0), "TXDCTL"},
 456
 457         /* List Terminator */
 458         { .name = NULL }
 459 };
 460
 461
 462 /*
 463  * ixgbe_regdump - register printout routine
 464  */
 465 static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo)
 466 {
 467         int i;
 468         char rname[16];
 469         u32 regs[64];
 470
 471         switch (reginfo->ofs) {
 472         case IXGBE_SRRCTL(0):
 473                 for (i = 0; i < 64; i++)
 474                         regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
 475                 break;
 476         case IXGBE_DCA_RXCTRL(0):
 477                 for (i = 0; i < 64; i++)
 478                         regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
 479                 break;
 480         case IXGBE_RDLEN(0):
 481                 for (i = 0; i < 64; i++)
 482                         regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i));
 483                 break;
 484         case IXGBE_RDH(0):
 485                 for (i = 0; i < 64; i++)
 486                         regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i));
 487                 break;
 488         case IXGBE_RDT(0):
 489                 for (i = 0; i < 64; i++)
 490                         regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i));
 491                 break;
 492         case IXGBE_RXDCTL(0):
 493                 for (i = 0; i < 64; i++)
 494                         regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
 495                 break;
 496         case IXGBE_RDBAL(0):
 497                 for (i = 0; i < 64; i++)
 498                         regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i));
 499                 break;
 500         case IXGBE_RDBAH(0):
 501                 for (i = 0; i < 64; i++)
 502                         regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i));
 503                 break;
 504         case IXGBE_TDBAL(0):
 505                 for (i = 0; i < 64; i++)
 506                         regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i));
 507                 break;
 508         case IXGBE_TDBAH(0):
 509                 for (i = 0; i < 64; i++)
 510                         regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i));
 511                 break;
 512         case IXGBE_TDLEN(0):
 513                 for (i = 0; i < 64; i++)
 514                         regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i));
 515                 break;
 516         case IXGBE_TDH(0):
 517                 for (i = 0; i < 64; i++)
 518                         regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i));
 519                 break;
 520         case IXGBE_TDT(0):
 521                 for (i = 0; i < 64; i++)
 522                         regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i));
 523                 break;
 524         case IXGBE_TXDCTL(0):
 525                 for (i = 0; i < 64; i++)
 526                         regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
 527                 break;
 528         default:
 529                 pr_info("%-15s %08x\n",
 530                         reginfo->name, IXGBE_READ_REG(hw, reginfo->ofs));
 531                 return;
 532         }
 533
 534         i = 0;
 535         while (i < 64) {
 536                 int j;
 537                 char buf[9 * 8 + 1];
 538                 char *p = buf;
 539
 540                 snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i, i + 7);
 541                 for (j = 0; j < 8; j++)
 542                         p += sprintf(p, " %08x", regs[i++]);
 543                 pr_err("%-15s%s\n", rname, buf);
 544         }
 545
 546 }
 547
 548 static void ixgbe_print_buffer(struct ixgbe_ring *ring, int n)
 549 {
 550         struct ixgbe_tx_buffer *tx_buffer;
 551
 552         tx_buffer = &ring->tx_buffer_info[ring->next_to_clean];
 553         pr_info(" %5d %5X %5X %016llX %08X %p %016llX\n",
 554                 n, ring->next_to_use, ring->next_to_clean,
 555                 (u64)dma_unmap_addr(tx_buffer, dma),
 556                 dma_unmap_len(tx_buffer, len),
 557                 tx_buffer->next_to_watch,
 558                 (u64)tx_buffer->time_stamp);
 559 }
 560
 561 /*
 562  * ixgbe_dump - Print registers, tx-rings and rx-rings
 563  */
 564 static void ixgbe_dump(struct ixgbe_adapter *adapter)
 565 {
 566         struct net_device *netdev = adapter->netdev;
 567         struct ixgbe_hw *hw = &adapter->hw;
 568         struct ixgbe_reg_info *reginfo;
 569         int n = 0;
 570         struct ixgbe_ring *ring;
 571         struct ixgbe_tx_buffer *tx_buffer;
 572         union ixgbe_adv_tx_desc *tx_desc;
 573         struct my_u0 { u64 a; u64 b; } *u0;
 574         struct ixgbe_ring *rx_ring;
 575         union ixgbe_adv_rx_desc *rx_desc;
 576         struct ixgbe_rx_buffer *rx_buffer_info;
 577         int i = 0;
 578
 579         if (!netif_msg_hw(adapter))
 580                 return;
 581
 582         /* Print netdevice Info */
 583         if (netdev) {
 584                 dev_info(&adapter->pdev->dev, "Net device Info\n");
 585                 pr_info("Device Name     state            "
 586                         "trans_start\n");
 587                 pr_info("%-15s %016lX %016lX\n",
 588                         netdev->name,
 589                         netdev->state,
 590                         dev_trans_start(netdev));
 591         }
 592
 593         /* Print Registers */
 594         dev_info(&adapter->pdev->dev, "Register Dump\n");
 595         pr_info(" Register Name   Value\n");
 596         for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl;
 597              reginfo->name; reginfo++) {
 598                 ixgbe_regdump(hw, reginfo);
 599         }
 600
 601         /* Print TX Ring Summary */
 602         if (!netdev || !netif_running(netdev))
 603                 return;
 604
 605         dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
 606         pr_info(" %s     %s              %s        %s\n",
 607                 "Queue [NTU] [NTC] [bi(ntc)->dma  ]",
 608                 "leng", "ntw", "timestamp");
 609         for (n = 0; n < adapter->num_tx_queues; n++) {
 610                 ring = adapter->tx_ring[n];
 611                 ixgbe_print_buffer(ring, n);
 612         }
 613
 614         for (n = 0; n < adapter->num_xdp_queues; n++) {
 615                 ring = adapter->xdp_ring[n];
 616                 ixgbe_print_buffer(ring, n);
 617         }
 618
 619         /* Print TX Rings */
 620         if (!netif_msg_tx_done(adapter))
 621                 goto rx_ring_summary;
 622
 623         dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
 624
 625         /* Transmit Descriptor Formats
 626          *
 627          * 82598 Advanced Transmit Descriptor
 628          *   +--------------------------------------------------------------+
 629          * 0 |         Buffer Address [63:0]                                |
 630          *   +--------------------------------------------------------------+
 631          * 8 |  PAYLEN  | POPTS  | IDX | STA | DCMD  |DTYP |  RSV |  DTALEN |
 632          *   +--------------------------------------------------------------+
 633          *   63       46 45    40 39 36 35 32 31   24 23 20 19              0
 634          *
 635          * 82598 Advanced Transmit Descriptor (Write-Back Format)
 636          *   +--------------------------------------------------------------+
 637          * 0 |                          RSV [63:0]                          |
 638          *   +--------------------------------------------------------------+
 639          * 8 |            RSV           |  STA  |          NXTSEQ           |
 640          *   +--------------------------------------------------------------+
 641          *   63                       36 35   32 31                         0
 642          *
 643          * 82599+ Advanced Transmit Descriptor
 644          *   +--------------------------------------------------------------+
 645          * 0 |         Buffer Address [63:0]                                |
 646          *   +--------------------------------------------------------------+
 647          * 8 |PAYLEN  |POPTS|CC|IDX  |STA  |DCMD  |DTYP |MAC  |RSV  |DTALEN |
 648          *   +--------------------------------------------------------------+
 649          *   63     46 45 40 39 38 36 35 32 31  24 23 20 19 18 17 16 15     0
 650          *
 651          * 82599+ Advanced Transmit Descriptor (Write-Back Format)
 652          *   +--------------------------------------------------------------+
 653          * 0 |                          RSV [63:0]                          |
 654          *   +--------------------------------------------------------------+
 655          * 8 |            RSV           |  STA  |           RSV             |
 656          *   +--------------------------------------------------------------+
 657          *   63                       36 35   32 31                         0
 658          */
 659
 660         for (n = 0; n < adapter->num_tx_queues; n++) {
 661                 ring = adapter->tx_ring[n];
 662                 pr_info("------------------------------------\n");
 663                 pr_info("TX QUEUE INDEX = %d\n", ring->queue_index);
 664                 pr_info("------------------------------------\n");
 665                 pr_info("%s%s    %s              %s        %s          %s\n",
 666                         "T [desc]     [address 63:0  ] ",
 667                         "[PlPOIdStDDt Ln] [bi->dma       ] ",
 668                         "leng", "ntw", "timestamp", "bi->skb");
 669
 670                 for (i = 0; ring->desc && (i < ring->count); i++) {
 671                         tx_desc = IXGBE_TX_DESC(ring, i);
 672                         tx_buffer = &ring->tx_buffer_info[i];
 673                         u0 = (struct my_u0 *)tx_desc;
 674                         if (dma_unmap_len(tx_buffer, len) > 0) {
 675                                 const char *ring_desc;
 676
 677                                 if (i == ring->next_to_use &&
 678                                     i == ring->next_to_clean)
 679                                         ring_desc = " NTC/U";
 680                                 else if (i == ring->next_to_use)
 681                                         ring_desc = " NTU";
 682                                 else if (i == ring->next_to_clean)
 683                                         ring_desc = " NTC";
 684                                 else
 685                                         ring_desc = "";
 686                                 pr_info("T [0x%03X]    %016llX %016llX %016llX %08X %p %016llX %p%s",
 687                                         i,
 688                                         le64_to_cpu((__force __le64)u0->a),
 689                                         le64_to_cpu((__force __le64)u0->b),
 690                                         (u64)dma_unmap_addr(tx_buffer, dma),
 691                                         dma_unmap_len(tx_buffer, len),
 692                                         tx_buffer->next_to_watch,
 693                                         (u64)tx_buffer->time_stamp,
 694                                         tx_buffer->skb,
 695                                         ring_desc);
 696
 697                                 if (netif_msg_pktdata(adapter) &&
 698                                     tx_buffer->skb)
 699                                         print_hex_dump(KERN_INFO, "",
 700                                                 DUMP_PREFIX_ADDRESS, 16, 1,
 701                                                 tx_buffer->skb->data,
 702                                                 dma_unmap_len(tx_buffer, len),
 703                                                 true);
 704                         }
 705                 }
 706         }
 707
 708         /* Print RX Rings Summary */
 709 rx_ring_summary:
 710         dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
 711         pr_info("Queue [NTU] [NTC]\n");
 712         for (n = 0; n < adapter->num_rx_queues; n++) {
 713                 rx_ring = adapter->rx_ring[n];
 714                 pr_info("%5d %5X %5X\n",
 715                         n, rx_ring->next_to_use, rx_ring->next_to_clean);
 716         }
 717
 718         /* Print RX Rings */
 719         if (!netif_msg_rx_status(adapter))
 720                 return;
 721
 722         dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
 723
 724         /* Receive Descriptor Formats
 725          *
 726          * 82598 Advanced Receive Descriptor (Read) Format
 727          *    63                                           1        0
 728          *    +-----------------------------------------------------+
 729          *  0 |       Packet Buffer Address [63:1]           |A0/NSE|
 730          *    +----------------------------------------------+------+
 731          *  8 |       Header Buffer Address [63:1]           |  DD  |
 732          *    +-----------------------------------------------------+
 733          *
 734          *
 735          * 82598 Advanced Receive Descriptor (Write-Back) Format
 736          *
 737          *   63       48 47    32 31  30      21 20 16 15   4 3     0
 738          *   +------------------------------------------------------+
 739          * 0 |       RSS Hash /  |SPH| HDR_LEN  | RSV |Packet|  RSS |
 740          *   | Packet   | IP     |   |          |     | Type | Type |
 741          *   | Checksum | Ident  |   |          |     |      |      |
 742          *   +------------------------------------------------------+
 743          * 8 | VLAN Tag | Length | Extended Error | Extended Status |
 744          *   +------------------------------------------------------+
 745          *   63       48 47    32 31            20 19               0
 746          *
 747          * 82599+ Advanced Receive Descriptor (Read) Format
 748          *    63                                           1        0
 749          *    +-----------------------------------------------------+
 750          *  0 |       Packet Buffer Address [63:1]           |A0/NSE|
 751          *    +----------------------------------------------+------+
 752          *  8 |       Header Buffer Address [63:1]           |  DD  |
 753          *    +-----------------------------------------------------+
 754          *
 755          *
 756          * 82599+ Advanced Receive Descriptor (Write-Back) Format
 757          *
 758          *   63       48 47    32 31  30      21 20 17 16   4 3     0
 759          *   +------------------------------------------------------+
 760          * 0 |RSS / Frag Checksum|SPH| HDR_LEN  |RSC- |Packet|  RSS |
 761          *   |/ RTT / PCoE_PARAM |   |          | CNT | Type | Type |
 762          *   |/ Flow Dir Flt ID  |   |          |     |      |      |
 763          *   +------------------------------------------------------+
 764          * 8 | VLAN Tag | Length |Extended Error| Xtnd Status/NEXTP |
 765          *   +------------------------------------------------------+
 766          *   63       48 47    32 31          20 19                 0
 767          */
 768
 769         for (n = 0; n < adapter->num_rx_queues; n++) {
 770                 rx_ring = adapter->rx_ring[n];
 771                 pr_info("------------------------------------\n");
 772                 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index);
 773                 pr_info("------------------------------------\n");
 774                 pr_info("%s%s%s\n",
 775                         "R  [desc]      [ PktBuf     A0] ",
 776                         "[  HeadBuf   DD] [bi->dma       ] [bi->skb       ] ",
 777                         "<-- Adv Rx Read format");
 778                 pr_info("%s%s%s\n",
 779                         "RWB[desc]      [PcsmIpSHl PtRs] ",
 780                         "[vl er S cks ln] ---------------- [bi->skb       ] ",
 781                         "<-- Adv Rx Write-Back format");
 782
 783                 for (i = 0; i < rx_ring->count; i++) {
 784                         const char *ring_desc;
 785
 786                         if (i == rx_ring->next_to_use)
 787                                 ring_desc = " NTU";
 788                         else if (i == rx_ring->next_to_clean)
 789                                 ring_desc = " NTC";
 790                         else
 791                                 ring_desc = "";
 792
 793                         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 794                         rx_desc = IXGBE_RX_DESC(rx_ring, i);
 795                         u0 = (struct my_u0 *)rx_desc;
 796                         if (rx_desc->wb.upper.length) {
 797                                 /* Descriptor Done */
 798                                 pr_info("RWB[0x%03X]     %016llX %016llX ---------------- %p%s\n",
 799                                         i,
 800                                         le64_to_cpu((__force __le64)u0->a),
 801                                         le64_to_cpu((__force __le64)u0->b),
 802                                         rx_buffer_info->skb,
 803                                         ring_desc);
 804                         } else {
 805                                 pr_info("R  [0x%03X]     %016llX %016llX %016llX %p%s\n",
 806                                         i,
 807                                         le64_to_cpu((__force __le64)u0->a),
 808                                         le64_to_cpu((__force __le64)u0->b),
 809                                         (u64)rx_buffer_info->dma,
 810                                         rx_buffer_info->skb,
 811                                         ring_desc);
 812
 813                                 if (netif_msg_pktdata(adapter) &&
 814                                     rx_buffer_info->dma) {
 815                                         print_hex_dump(KERN_INFO, "",
 816                                            DUMP_PREFIX_ADDRESS, 16, 1,
 817                                            page_address(rx_buffer_info->page) +
 818                                                     rx_buffer_info->page_offset,
 819                                            ixgbe_rx_bufsz(rx_ring), true);
 820                                 }
 821                         }
 822                 }
 823         }
 824 }
 825
 826 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
 827 {
 828         u32 ctrl_ext;
 829
 830         /* Let firmware take over control of h/w */
 831         ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
 832         IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
 833                         ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
 834 }
 835
 836 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
 837 {
 838         u32 ctrl_ext;
 839
 840         /* Let firmware know the driver has taken over */
 841         ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
 842         IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
 843                         ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
 844 }
 845
 846 /**
 847  * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
 848  * @adapter: pointer to adapter struct
 849  * @direction: 0 for Rx, 1 for Tx, -1 for other causes
 850  * @queue: queue to map the corresponding interrupt to
 851  * @msix_vector: the vector to map to the corresponding queue
 852  *
 853  */
 854 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
 855                            u8 queue, u8 msix_vector)
 856 {
 857         u32 ivar, index;
 858         struct ixgbe_hw *hw = &adapter->hw;
 859         switch (hw->mac.type) {
 860         case ixgbe_mac_82598EB:
 861                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 862                 if (direction == -1)
 863                         direction = 0;
 864                 index = (((direction * 64) + queue) >> 2) & 0x1F;
 865                 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
 866                 ivar &= ~(0xFF << (8 * (queue & 0x3)));
 867                 ivar |= (msix_vector << (8 * (queue & 0x3)));
 868                 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
 869                 break;
 870         case ixgbe_mac_82599EB:
 871         case ixgbe_mac_X540:
 872         case ixgbe_mac_X550:
 873         case ixgbe_mac_X550EM_x:
 874         case ixgbe_mac_x550em_a:
 875                 if (direction == -1) {
 876                         /* other causes */
 877                         msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 878                         index = ((queue & 1) * 8);
 879                         ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
 880                         ivar &= ~(0xFF << index);
 881                         ivar |= (msix_vector << index);
 882                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
 883                         break;
 884                 } else {
 885                         /* tx or rx causes */
 886                         msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 887                         index = ((16 * (queue & 1)) + (8 * direction));
 888                         ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
 889                         ivar &= ~(0xFF << index);
 890                         ivar |= (msix_vector << index);
 891                         IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
 892                         break;
 893                 }
 894         default:
 895                 break;
 896         }
 897 }
 898
 899 void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
 900                             u64 qmask)
 901 {
 902         u32 mask;
 903
 904         switch (adapter->hw.mac.type) {
 905         case ixgbe_mac_82598EB:
 906                 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
 907                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
 908                 break;
 909         case ixgbe_mac_82599EB:
 910         case ixgbe_mac_X540:
 911         case ixgbe_mac_X550:
 912         case ixgbe_mac_X550EM_x:
 913         case ixgbe_mac_x550em_a:
 914                 mask = (qmask & 0xFFFFFFFF);
 915                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
 916                 mask = (qmask >> 32);
 917                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
 918                 break;
 919         default:
 920                 break;
 921         }
 922 }
 923
 924 static void ixgbe_update_xoff_rx_lfc(struct ixgbe_adapter *adapter)
 925 {
 926         struct ixgbe_hw *hw = &adapter->hw;
 927         struct ixgbe_hw_stats *hwstats = &adapter->stats;
 928         int i;
 929         u32 data;
 930
 931         if ((hw->fc.current_mode != ixgbe_fc_full) &&
 932             (hw->fc.current_mode != ixgbe_fc_rx_pause))
 933                 return;
 934
 935         switch (hw->mac.type) {
 936         case ixgbe_mac_82598EB:
 937                 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
 938                 break;
 939         default:
 940                 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
 941         }
 942         hwstats->lxoffrxc += data;
 943
 944         /* refill credits (no tx hang) if we received xoff */
 945         if (!data)
 946                 return;
 947
 948         for (i = 0; i < adapter->num_tx_queues; i++)
 949                 clear_bit(__IXGBE_HANG_CHECK_ARMED,
 950                           &adapter->tx_ring[i]->state);
 951
 952         for (i = 0; i < adapter->num_xdp_queues; i++)
 953                 clear_bit(__IXGBE_HANG_CHECK_ARMED,
 954                           &adapter->xdp_ring[i]->state);
 955 }
 956
 957 static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter)
 958 {
 959         struct ixgbe_hw *hw = &adapter->hw;
 960         struct ixgbe_hw_stats *hwstats = &adapter->stats;
 961         u32 xoff[8] = {0};
 962         u8 tc;
 963         int i;
 964         bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
 965
 966         if (adapter->ixgbe_ieee_pfc)
 967                 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
 968
 969         if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED) || !pfc_en) {
 970                 ixgbe_update_xoff_rx_lfc(adapter);
 971                 return;
 972         }
 973
 974         /* update stats for each tc, only valid with PFC enabled */
 975         for (i = 0; i < MAX_TX_PACKET_BUFFERS; i++) {
 976                 u32 pxoffrxc;
 977
 978                 switch (hw->mac.type) {
 979                 case ixgbe_mac_82598EB:
 980                         pxoffrxc = IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
 981                         break;
 982                 default:
 983                         pxoffrxc = IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
 984                 }
 985                 hwstats->pxoffrxc[i] += pxoffrxc;
 986                 /* Get the TC for given UP */
 987                 tc = netdev_get_prio_tc_map(adapter->netdev, i);
 988                 xoff[tc] += pxoffrxc;
 989         }
 990
 991         /* disarm tx queues that have received xoff frames */
 992         for (i = 0; i < adapter->num_tx_queues; i++) {
 993                 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
 994
 995                 tc = tx_ring->dcb_tc;
 996                 if (xoff[tc])
 997                         clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
 998         }
 999
1000         for (i = 0; i < adapter->num_xdp_queues; i++) {
1001                 struct ixgbe_ring *xdp_ring = adapter->xdp_ring[i];
1002
1003                 tc = xdp_ring->dcb_tc;
1004                 if (xoff[tc])
1005                         clear_bit(__IXGBE_HANG_CHECK_ARMED, &xdp_ring->state);
1006         }
1007 }
1008
1009 static u64 ixgbe_get_tx_completed(struct ixgbe_ring *ring)
1010 {
1011         return ring->stats.packets;
1012 }
1013
1014 static u64 ixgbe_get_tx_pending(struct ixgbe_ring *ring)
1015 {
1016         unsigned int head, tail;
1017
1018         head = ring->next_to_clean;
1019         tail = ring->next_to_use;
1020
1021         return ((head <= tail) ? tail : tail + ring->count) - head;
1022 }
1023
1024 static inline bool ixgbe_check_tx_hang(struct ixgbe_ring *tx_ring)
1025 {
1026         u32 tx_done = ixgbe_get_tx_completed(tx_ring);
1027         u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
1028         u32 tx_pending = ixgbe_get_tx_pending(tx_ring);
1029
1030         clear_check_for_tx_hang(tx_ring);
1031
1032         /*
1033          * Check for a hung queue, but be thorough. This verifies
1034          * that a transmit has been completed since the previous
1035          * check AND there is at least one packet pending. The
1036          * ARMED bit is set to indicate a potential hang. The
1037          * bit is cleared if a pause frame is received to remove
1038          * false hang detection due to PFC or 802.3x frames. By
1039          * requiring this to fail twice we avoid races with
1040          * pfc clearing the ARMED bit and conditions where we
1041          * run the check_tx_hang logic with a transmit completion
1042          * pending but without time to complete it yet.
1043          */
1044         if (tx_done_old == tx_done && tx_pending)
1045                 /* make sure it is true for two checks in a row */
1046                 return test_and_set_bit(__IXGBE_HANG_CHECK_ARMED,
1047                                         &tx_ring->state);
1048         /* update completed stats and continue */
1049         tx_ring->tx_stats.tx_done_old = tx_done;
1050         /* reset the countdown */
1051         clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
1052
1053         return false;
1054 }
1055
1056 /**
1057  * ixgbe_tx_timeout_reset - initiate reset due to Tx timeout
1058  * @adapter: driver private struct
1059  **/
1060 static void ixgbe_tx_timeout_reset(struct ixgbe_adapter *adapter)
1061 {
1062
1063         /* Do the reset outside of interrupt context */
1064         if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1065                 set_bit(__IXGBE_RESET_REQUESTED, &adapter->state);
1066                 e_warn(drv, "initiating reset due to tx timeout\n");
1067                 ixgbe_service_event_schedule(adapter);
1068         }
1069 }
1070
1071 /**
1072  * ixgbe_tx_maxrate - callback to set the maximum per-queue bitrate
1073  * @netdev: network interface device structure
1074  * @queue_index: Tx queue to set
1075  * @maxrate: desired maximum transmit bitrate
1076  **/
1077 static int ixgbe_tx_maxrate(struct net_device *netdev,
1078                             int queue_index, u32 maxrate)
1079 {
1080         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1081         struct ixgbe_hw *hw = &adapter->hw;
1082         u32 bcnrc_val = ixgbe_link_mbps(adapter);
1083
1084         if (!maxrate)
1085                 return 0;
1086
1087         /* Calculate the rate factor values to set */
1088         bcnrc_val <<= IXGBE_RTTBCNRC_RF_INT_SHIFT;
1089         bcnrc_val /= maxrate;
1090
1091         /* clear everything but the rate factor */
1092         bcnrc_val &= IXGBE_RTTBCNRC_RF_INT_MASK |
1093         IXGBE_RTTBCNRC_RF_DEC_MASK;
1094
1095         /* enable the rate scheduler */
1096         bcnrc_val |= IXGBE_RTTBCNRC_RS_ENA;
1097
1098         IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, queue_index);
1099         IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRC, bcnrc_val);
1100
1101         return 0;
1102 }
1103
1104 /**
1105  * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
1106  * @q_vector: structure containing interrupt and ring information
1107  * @tx_ring: tx ring to clean
1108  * @napi_budget: Used to determine if we are in netpoll
1109  **/
1110 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
1111                                struct ixgbe_ring *tx_ring, int napi_budget)
1112 {
1113         struct ixgbe_adapter *adapter = q_vector->adapter;
1114         struct ixgbe_tx_buffer *tx_buffer;
1115         union ixgbe_adv_tx_desc *tx_desc;
1116         unsigned int total_bytes = 0, total_packets = 0, total_ipsec = 0;
1117         unsigned int budget = q_vector->tx.work_limit;
1118         unsigned int i = tx_ring->next_to_clean;
1119
1120         if (test_bit(__IXGBE_DOWN, &adapter->state))
1121                 return true;
1122
1123         tx_buffer = &tx_ring->tx_buffer_info[i];
1124         tx_desc = IXGBE_TX_DESC(tx_ring, i);
1125         i -= tx_ring->count;
1126
1127         do {
1128                 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
1129
1130                 /* if next_to_watch is not set then there is no work pending */
1131                 if (!eop_desc)
1132                         break;
1133
1134                 /* prevent any other reads prior to eop_desc */
1135                 smp_rmb();
1136
1137                 /* if DD is not set pending work has not been completed */
1138                 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
1139                         break;
1140
1141                 /* clear next_to_watch to prevent false hangs */
1142                 tx_buffer->next_to_watch = NULL;
1143
1144                 /* update the statistics for this packet */
1145                 total_bytes += tx_buffer->bytecount;
1146                 total_packets += tx_buffer->gso_segs;
1147                 if (tx_buffer->tx_flags & IXGBE_TX_FLAGS_IPSEC)
1148                         total_ipsec++;
1149
1150                 /* free the skb */
1151                 if (ring_is_xdp(tx_ring))
1152                         xdp_return_frame(tx_buffer->xdpf);
1153                 else
1154                         napi_consume_skb(tx_buffer->skb, napi_budget);
1155
1156                 /* unmap skb header data */
1157                 dma_unmap_single(tx_ring->dev,
1158                                  dma_unmap_addr(tx_buffer, dma),
1159                                  dma_unmap_len(tx_buffer, len),
1160                                  DMA_TO_DEVICE);
1161
1162                 /* clear tx_buffer data */
1163                 dma_unmap_len_set(tx_buffer, len, 0);
1164
1165                 /* unmap remaining buffers */
1166                 while (tx_desc != eop_desc) {
1167                         tx_buffer++;
1168                         tx_desc++;
1169                         i++;
1170                         if (unlikely(!i)) {
1171                                 i -= tx_ring->count;
1172                                 tx_buffer = tx_ring->tx_buffer_info;
1173                                 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
1174                         }
1175
1176                         /* unmap any remaining paged data */
1177                         if (dma_unmap_len(tx_buffer, len)) {
1178                                 dma_unmap_page(tx_ring->dev,
1179                                                dma_unmap_addr(tx_buffer, dma),
1180                                                dma_unmap_len(tx_buffer, len),
1181                                                DMA_TO_DEVICE);
1182                                 dma_unmap_len_set(tx_buffer, len, 0);
1183                         }
1184                 }
1185
1186                 /* move us one more past the eop_desc for start of next pkt */
1187                 tx_buffer++;
1188                 tx_desc++;
1189                 i++;
1190                 if (unlikely(!i)) {
1191                         i -= tx_ring->count;
1192                         tx_buffer = tx_ring->tx_buffer_info;
1193                         tx_desc = IXGBE_TX_DESC(tx_ring, 0);
1194                 }
1195
1196                 /* issue prefetch for next Tx descriptor */
1197                 prefetch(tx_desc);
1198
1199                 /* update budget accounting */
1200                 budget--;
1201         } while (likely(budget));
1202
1203         i += tx_ring->count;
1204         tx_ring->next_to_clean = i;
1205         u64_stats_update_begin(&tx_ring->syncp);
1206         tx_ring->stats.bytes += total_bytes;
1207         tx_ring->stats.packets += total_packets;
1208         u64_stats_update_end(&tx_ring->syncp);
1209         q_vector->tx.total_bytes += total_bytes;
1210         q_vector->tx.total_packets += total_packets;
1211         adapter->tx_ipsec += total_ipsec;
1212
1213         if (check_for_tx_hang(tx_ring) && ixgbe_check_tx_hang(tx_ring)) {
1214                 /* schedule immediate reset if we believe we hung */
1215                 struct ixgbe_hw *hw = &adapter->hw;
1216                 e_err(drv, "Detected Tx Unit Hang %s\n"
1217                         "  Tx Queue             <%d>\n"
1218                         "  TDH, TDT             <%x>, <%x>\n"
1219                         "  next_to_use          <%x>\n"
1220                         "  next_to_clean        <%x>\n"
1221                         "tx_buffer_info[next_to_clean]\n"
1222                         "  time_stamp           <%lx>\n"
1223                         "  jiffies              <%lx>\n",
1224                         ring_is_xdp(tx_ring) ? "(XDP)" : "",
1225                         tx_ring->queue_index,
1226                         IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)),
1227                         IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)),
1228                         tx_ring->next_to_use, i,
1229                         tx_ring->tx_buffer_info[i].time_stamp, jiffies);
1230
1231                 if (!ring_is_xdp(tx_ring))
1232                         netif_stop_subqueue(tx_ring->netdev,
1233                                             tx_ring->queue_index);
1234
1235                 e_info(probe,
1236                        "tx hang %d detected on queue %d, resetting adapter\n",
1237                         adapter->tx_timeout_count + 1, tx_ring->queue_index);
1238
1239                 /* schedule immediate reset if we believe we hung */
1240                 ixgbe_tx_timeout_reset(adapter);
1241
1242                 /* the adapter is about to reset, no point in enabling stuff */
1243                 return true;
1244         }
1245
1246         if (ring_is_xdp(tx_ring))
1247                 return !!budget;
1248
1249         netdev_tx_completed_queue(txring_txq(tx_ring),
1250                                   total_packets, total_bytes);
1251
1252 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
1253         if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
1254                      (ixgbe_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
1255                 /* Make sure that anybody stopping the queue after this
1256                  * sees the new next_to_clean.
1257                  */
1258                 smp_mb();
1259                 if (__netif_subqueue_stopped(tx_ring->netdev,
1260                                              tx_ring->queue_index)
1261                     && !test_bit(__IXGBE_DOWN, &adapter->state)) {
1262                         netif_wake_subqueue(tx_ring->netdev,
1263                                             tx_ring->queue_index);
1264                         ++tx_ring->tx_stats.restart_queue;
1265                 }
1266         }
1267
1268         return !!budget;
1269 }
1270
1271 #ifdef CONFIG_IXGBE_DCA
1272 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
1273                                 struct ixgbe_ring *tx_ring,
1274                                 int cpu)
1275 {
1276         struct ixgbe_hw *hw = &adapter->hw;
1277         u32 txctrl = 0;
1278         u16 reg_offset;
1279
1280         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1281                 txctrl = dca3_get_tag(tx_ring->dev, cpu);
1282
1283         switch (hw->mac.type) {
1284         case ixgbe_mac_82598EB:
1285                 reg_offset = IXGBE_DCA_TXCTRL(tx_ring->reg_idx);
1286                 break;
1287         case ixgbe_mac_82599EB:
1288         case ixgbe_mac_X540:
1289                 reg_offset = IXGBE_DCA_TXCTRL_82599(tx_ring->reg_idx);
1290                 txctrl <<= IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599;
1291                 break;
1292         default:
1293                 /* for unknown hardware do not write register */
1294                 return;
1295         }
1296
1297         /*
1298          * We can enable relaxed ordering for reads, but not writes when
1299          * DCA is enabled.  This is due to a known issue in some chipsets
1300          * which will cause the DCA tag to be cleared.
1301          */
1302         txctrl |= IXGBE_DCA_TXCTRL_DESC_RRO_EN |
1303                   IXGBE_DCA_TXCTRL_DATA_RRO_EN |
1304                   IXGBE_DCA_TXCTRL_DESC_DCA_EN;
1305
1306         IXGBE_WRITE_REG(hw, reg_offset, txctrl);
1307 }
1308
1309 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
1310                                 struct ixgbe_ring *rx_ring,
1311                                 int cpu)
1312 {
1313         struct ixgbe_hw *hw = &adapter->hw;
1314         u32 rxctrl = 0;
1315         u8 reg_idx = rx_ring->reg_idx;
1316
1317         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1318                 rxctrl = dca3_get_tag(rx_ring->dev, cpu);
1319
1320         switch (hw->mac.type) {
1321         case ixgbe_mac_82599EB:
1322         case ixgbe_mac_X540:
1323                 rxctrl <<= IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599;
1324                 break;
1325         default:
1326                 break;
1327         }
1328
1329         /*
1330          * We can enable relaxed ordering for reads, but not writes when
1331          * DCA is enabled.  This is due to a known issue in some chipsets
1332          * which will cause the DCA tag to be cleared.
1333          */
1334         rxctrl |= IXGBE_DCA_RXCTRL_DESC_RRO_EN |
1335                   IXGBE_DCA_RXCTRL_DATA_DCA_EN |
1336                   IXGBE_DCA_RXCTRL_DESC_DCA_EN;
1337
1338         IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl);
1339 }
1340
1341 static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector)
1342 {
1343         struct ixgbe_adapter *adapter = q_vector->adapter;
1344         struct ixgbe_ring *ring;
1345         int cpu = get_cpu();
1346
1347         if (q_vector->cpu == cpu)
1348                 goto out_no_update;
1349
1350         ixgbe_for_each_ring(ring, q_vector->tx)
1351                 ixgbe_update_tx_dca(adapter, ring, cpu);
1352
1353         ixgbe_for_each_ring(ring, q_vector->rx)
1354                 ixgbe_update_rx_dca(adapter, ring, cpu);
1355
1356         q_vector->cpu = cpu;
1357 out_no_update:
1358         put_cpu();
1359 }
1360
1361 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
1362 {
1363         int i;
1364
1365         /* always use CB2 mode, difference is masked in the CB driver */
1366         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1367                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
1368                                 IXGBE_DCA_CTRL_DCA_MODE_CB2);
1369         else
1370                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
1371                                 IXGBE_DCA_CTRL_DCA_DISABLE);
1372
1373         for (i = 0; i < adapter->num_q_vectors; i++) {
1374                 adapter->q_vector[i]->cpu = -1;
1375                 ixgbe_update_dca(adapter->q_vector[i]);
1376         }
1377 }
1378
1379 static int __ixgbe_notify_dca(struct device *dev, void *data)
1380 {
1381         struct ixgbe_adapter *adapter = dev_get_drvdata(dev);
1382         unsigned long event = *(unsigned long *)data;
1383
1384         if (!(adapter->flags & IXGBE_FLAG_DCA_CAPABLE))
1385                 return 0;
1386
1387         switch (event) {
1388         case DCA_PROVIDER_ADD:
1389                 /* if we're already enabled, don't do it again */
1390                 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1391                         break;
1392                 if (dca_add_requester(dev) == 0) {
1393                         adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
1394                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
1395                                         IXGBE_DCA_CTRL_DCA_MODE_CB2);
1396                         break;
1397                 }
1398                 fallthrough; /* DCA is disabled. */
1399         case DCA_PROVIDER_REMOVE:
1400                 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
1401                         dca_remove_requester(dev);
1402                         adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
1403                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
1404                                         IXGBE_DCA_CTRL_DCA_DISABLE);
1405                 }
1406                 break;
1407         }
1408
1409         return 0;
1410 }
1411
1412 #endif /* CONFIG_IXGBE_DCA */
1413
1414 #define IXGBE_RSS_L4_TYPES_MASK \
1415         ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \
1416          (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \
1417          (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \
1418          (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP))
1419
1420 static inline void ixgbe_rx_hash(struct ixgbe_ring *ring,
1421                                  union ixgbe_adv_rx_desc *rx_desc,
1422                                  struct sk_buff *skb)
1423 {
1424         u16 rss_type;
1425
1426         if (!(ring->netdev->features & NETIF_F_RXHASH))
1427                 return;
1428
1429         rss_type = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.pkt_info) &
1430                    IXGBE_RXDADV_RSSTYPE_MASK;
1431
1432         if (!rss_type)
1433                 return;
1434
1435         skb_set_hash(skb, le32_to_cpu(rx_desc->wb.lower.hi_dword.rss),
1436                      (IXGBE_RSS_L4_TYPES_MASK & (1ul << rss_type)) ?
1437                      PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
1438 }
1439
1440 #ifdef IXGBE_FCOE
1441 /**
1442  * ixgbe_rx_is_fcoe - check the rx desc for incoming pkt type
1443  * @ring: structure containing ring specific data
1444  * @rx_desc: advanced rx descriptor
1445  *
1446  * Returns : true if it is FCoE pkt
1447  */
1448 static inline bool ixgbe_rx_is_fcoe(struct ixgbe_ring *ring,
1449                                     union ixgbe_adv_rx_desc *rx_desc)
1450 {
1451         __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1452
1453         return test_bit(__IXGBE_RX_FCOE, &ring->state) &&
1454                ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_ETQF_MASK)) ==
1455                 (cpu_to_le16(IXGBE_ETQF_FILTER_FCOE <<
1456                              IXGBE_RXDADV_PKTTYPE_ETQF_SHIFT)));
1457 }
1458
1459 #endif /* IXGBE_FCOE */
1460 /**
1461  * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
1462  * @ring: structure containing ring specific data
1463  * @rx_desc: current Rx descriptor being processed
1464  * @skb: skb currently being received and modified
1465  **/
1466 static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring,
1467                                      union ixgbe_adv_rx_desc *rx_desc,
1468                                      struct sk_buff *skb)
1469 {
1470         __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1471         bool encap_pkt = false;
1472
1473         skb_checksum_none_assert(skb);
1474
1475         /* Rx csum disabled */
1476         if (!(ring->netdev->features & NETIF_F_RXCSUM))
1477                 return;
1478
1479         /* check for VXLAN and Geneve packets */
1480         if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_VXLAN)) {
1481                 encap_pkt = true;
1482                 skb->encapsulation = 1;
1483         }
1484
1485         /* if IP and error */
1486         if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
1487             ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
1488                 ring->rx_stats.csum_err++;
1489                 return;
1490         }
1491
1492         if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))
1493                 return;
1494
1495         if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {
1496                 /*
1497                  * 82599 errata, UDP frames with a 0 checksum can be marked as
1498                  * checksum errors.
1499                  */
1500                 if ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_UDP)) &&
1501                     test_bit(__IXGBE_RX_CSUM_UDP_ZERO_ERR, &ring->state))
1502                         return;
1503
1504                 ring->rx_stats.csum_err++;
1505                 return;
1506         }
1507
1508         /* It must be a TCP or UDP packet with a valid checksum */
1509         skb->ip_summed = CHECKSUM_UNNECESSARY;
1510         if (encap_pkt) {
1511                 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_OUTERIPCS))
1512                         return;
1513
1514                 if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_OUTERIPER)) {
1515                         skb->ip_summed = CHECKSUM_NONE;
1516                         return;
1517                 }
1518                 /* If we checked the outer header let the stack know */
1519                 skb->csum_level = 1;
1520         }
1521 }
1522
1523 static unsigned int ixgbe_rx_offset(struct ixgbe_ring *rx_ring)
1524 {
1525         return ring_uses_build_skb(rx_ring) ? IXGBE_SKB_PAD : 0;
1526 }
1527
1528 static bool ixgbe_alloc_mapped_page(struct ixgbe_ring *rx_ring,
1529                                     struct ixgbe_rx_buffer *bi)
1530 {
1531         struct page *page = bi->page;
1532         dma_addr_t dma;
1533
1534         /* since we are recycling buffers we should seldom need to alloc */
1535         if (likely(page))
1536                 return true;
1537
1538         /* alloc new page for storage */
1539         page = dev_alloc_pages(ixgbe_rx_pg_order(rx_ring));
1540         if (unlikely(!page)) {
1541                 rx_ring->rx_stats.alloc_rx_page_failed++;
1542                 return false;
1543         }
1544
1545         /* map page for use */
1546         dma = dma_map_page_attrs(rx_ring->dev, page, 0,
1547                                  ixgbe_rx_pg_size(rx_ring),
1548                                  DMA_FROM_DEVICE,
1549                                  IXGBE_RX_DMA_ATTR);
1550
1551         /*
1552          * if mapping failed free memory back to system since
1553          * there isn't much point in holding memory we can't use
1554          */
1555         if (dma_mapping_error(rx_ring->dev, dma)) {
1556                 __free_pages(page, ixgbe_rx_pg_order(rx_ring));
1557
1558                 rx_ring->rx_stats.alloc_rx_page_failed++;
1559                 return false;
1560         }
1561
1562         bi->dma = dma;
1563         bi->page = page;
1564         bi->page_offset = rx_ring->rx_offset;
1565         page_ref_add(page, USHRT_MAX - 1);
1566         bi->pagecnt_bias = USHRT_MAX;
1567         rx_ring->rx_stats.alloc_rx_page++;
1568
1569         return true;
1570 }
1571
1572 /**
1573  * ixgbe_alloc_rx_buffers - Replace used receive buffers
1574  * @rx_ring: ring to place buffers on
1575  * @cleaned_count: number of buffers to replace
1576  **/
1577 void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count)
1578 {
1579         union ixgbe_adv_rx_desc *rx_desc;
1580         struct ixgbe_rx_buffer *bi;
1581         u16 i = rx_ring->next_to_use;
1582         u16 bufsz;
1583
1584         /* nothing to do */
1585         if (!cleaned_count)
1586                 return;
1587
1588         rx_desc = IXGBE_RX_DESC(rx_ring, i);
1589         bi = &rx_ring->rx_buffer_info[i];
1590         i -= rx_ring->count;
1591
1592         bufsz = ixgbe_rx_bufsz(rx_ring);
1593
1594         do {
1595                 if (!ixgbe_alloc_mapped_page(rx_ring, bi))
1596                         break;
1597
1598                 /* sync the buffer for use by the device */
1599                 dma_sync_single_range_for_device(rx_ring->dev, bi->dma,
1600                                                  bi->page_offset, bufsz,
1601                                                  DMA_FROM_DEVICE);
1602
1603                 /*
1604                  * Refresh the desc even if buffer_addrs didn't change
1605                  * because each write-back erases this info.
1606                  */
1607                 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
1608
1609                 rx_desc++;
1610                 bi++;
1611                 i++;
1612                 if (unlikely(!i)) {
1613                         rx_desc = IXGBE_RX_DESC(rx_ring, 0);
1614                         bi = rx_ring->rx_buffer_info;
1615                         i -= rx_ring->count;
1616                 }
1617
1618                 /* clear the length for the next_to_use descriptor */
1619                 rx_desc->wb.upper.length = 0;
1620
1621                 cleaned_count--;
1622         } while (cleaned_count);
1623
1624         i += rx_ring->count;
1625
1626         if (rx_ring->next_to_use != i) {
1627                 rx_ring->next_to_use = i;
1628
1629                 /* update next to alloc since we have filled the ring */
1630                 rx_ring->next_to_alloc = i;
1631
1632                 /* Force memory writes to complete before letting h/w
1633                  * know there are new descriptors to fetch.  (Only
1634                  * applicable for weak-ordered memory model archs,
1635                  * such as IA-64).
1636                  */
1637                 wmb();
1638                 writel(i, rx_ring->tail);
1639         }
1640 }
1641
1642 static void ixgbe_set_rsc_gso_size(struct ixgbe_ring *ring,
1643                                    struct sk_buff *skb)
1644 {
1645         u16 hdr_len = skb_headlen(skb);
1646
1647         /* set gso_size to avoid messing up TCP MSS */
1648         skb_shinfo(skb)->gso_size = DIV_ROUND_UP((skb->len - hdr_len),
1649                                                  IXGBE_CB(skb)->append_cnt);
1650         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1651 }
1652
1653 static void ixgbe_update_rsc_stats(struct ixgbe_ring *rx_ring,
1654                                    struct sk_buff *skb)
1655 {
1656         /* if append_cnt is 0 then frame is not RSC */
1657         if (!IXGBE_CB(skb)->append_cnt)
1658                 return;
1659
1660         rx_ring->rx_stats.rsc_count += IXGBE_CB(skb)->append_cnt;
1661         rx_ring->rx_stats.rsc_flush++;
1662
1663         ixgbe_set_rsc_gso_size(rx_ring, skb);
1664
1665         /* gso_size is computed using append_cnt so always clear it last */
1666         IXGBE_CB(skb)->append_cnt = 0;
1667 }
1668
1669 /**
1670  * ixgbe_process_skb_fields - Populate skb header fields from Rx descriptor
1671  * @rx_ring: rx descriptor ring packet is being transacted on
1672  * @rx_desc: pointer to the EOP Rx descriptor
1673  * @skb: pointer to current skb being populated
1674  *
1675  * This function checks the ring, descriptor, and packet information in
1676  * order to populate the hash, checksum, VLAN, timestamp, protocol, and
1677  * other fields within the skb.
1678  **/
1679 void ixgbe_process_skb_fields(struct ixgbe_ring *rx_ring,
1680                               union ixgbe_adv_rx_desc *rx_desc,
1681                               struct sk_buff *skb)
1682 {
1683         struct net_device *dev = rx_ring->netdev;
1684         u32 flags = rx_ring->q_vector->adapter->flags;
1685
1686         ixgbe_update_rsc_stats(rx_ring, skb);
1687
1688         ixgbe_rx_hash(rx_ring, rx_desc, skb);
1689
1690         ixgbe_rx_checksum(rx_ring, rx_desc, skb);
1691
1692         if (unlikely(flags & IXGBE_FLAG_RX_HWTSTAMP_ENABLED))
1693                 ixgbe_ptp_rx_hwtstamp(rx_ring, rx_desc, skb);
1694
1695         if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
1696             ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {
1697                 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
1698                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1699         }
1700
1701         if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_STAT_SECP))
1702                 ixgbe_ipsec_rx(rx_ring, rx_desc, skb);
1703
1704         /* record Rx queue, or update MACVLAN statistics */
1705         if (netif_is_ixgbe(dev))
1706                 skb_record_rx_queue(skb, rx_ring->queue_index);
1707         else
1708                 macvlan_count_rx(netdev_priv(dev), skb->len + ETH_HLEN, true,
1709                                  false);
1710
1711         skb->protocol = eth_type_trans(skb, dev);
1712 }
1713
1714 void ixgbe_rx_skb(struct ixgbe_q_vector *q_vector,
1715                   struct sk_buff *skb)
1716 {
1717         napi_gro_receive(&q_vector->napi, skb);
1718 }
1719
1720 /**
1721  * ixgbe_is_non_eop - process handling of non-EOP buffers
1722  * @rx_ring: Rx ring being processed
1723  * @rx_desc: Rx descriptor for current buffer
1724  * @skb: Current socket buffer containing buffer in progress
1725  *
1726  * This function updates next to clean.  If the buffer is an EOP buffer
1727  * this function exits returning false, otherwise it will place the
1728  * sk_buff in the next buffer to be chained and return true indicating
1729  * that this is in fact a non-EOP buffer.
1730  **/
1731 static bool ixgbe_is_non_eop(struct ixgbe_ring *rx_ring,
1732                              union ixgbe_adv_rx_desc *rx_desc,
1733                              struct sk_buff *skb)
1734 {
1735         u32 ntc = rx_ring->next_to_clean + 1;
1736
1737         /* fetch, update, and store next to clean */
1738         ntc = (ntc < rx_ring->count) ? ntc : 0;
1739         rx_ring->next_to_clean = ntc;
1740
1741         prefetch(IXGBE_RX_DESC(rx_ring, ntc));
1742
1743         /* update RSC append count if present */
1744         if (ring_is_rsc_enabled(rx_ring)) {
1745                 __le32 rsc_enabled = rx_desc->wb.lower.lo_dword.data &
1746                                      cpu_to_le32(IXGBE_RXDADV_RSCCNT_MASK);
1747
1748                 if (unlikely(rsc_enabled)) {
1749                         u32 rsc_cnt = le32_to_cpu(rsc_enabled);
1750
1751                         rsc_cnt >>= IXGBE_RXDADV_RSCCNT_SHIFT;
1752                         IXGBE_CB(skb)->append_cnt += rsc_cnt - 1;
1753
1754                         /* update ntc based on RSC value */
1755                         ntc = le32_to_cpu(rx_desc->wb.upper.status_error);
1756                         ntc &= IXGBE_RXDADV_NEXTP_MASK;
1757                         ntc >>= IXGBE_RXDADV_NEXTP_SHIFT;
1758                 }
1759         }
1760
1761         /* if we are the last buffer then there is nothing else to do */
1762         if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
1763                 return false;
1764
1765         /* place skb in next buffer to be received */
1766         rx_ring->rx_buffer_info[ntc].skb = skb;
1767         rx_ring->rx_stats.non_eop_descs++;
1768
1769         return true;
1770 }
1771
1772 /**
1773  * ixgbe_pull_tail - ixgbe specific version of skb_pull_tail
1774  * @rx_ring: rx descriptor ring packet is being transacted on
1775  * @skb: pointer to current skb being adjusted
1776  *
1777  * This function is an ixgbe specific version of __pskb_pull_tail.  The
1778  * main difference between this version and the original function is that
1779  * this function can make several assumptions about the state of things
1780  * that allow for significant optimizations versus the standard function.
1781  * As a result we can do things like drop a frag and maintain an accurate
1782  * truesize for the skb.
1783  */
1784 static void ixgbe_pull_tail(struct ixgbe_ring *rx_ring,
1785                             struct sk_buff *skb)
1786 {
1787         skb_frag_t *frag = &skb_shinfo(skb)->frags[0];
1788         unsigned char *va;
1789         unsigned int pull_len;
1790
1791         /*
1792          * it is valid to use page_address instead of kmap since we are
1793          * working with pages allocated out of the lomem pool per
1794          * alloc_page(GFP_ATOMIC)
1795          */
1796         va = skb_frag_address(frag);
1797
1798         /*
1799          * we need the header to contain the greater of either ETH_HLEN or
1800          * 60 bytes if the skb->len is less than 60 for skb_pad.
1801          */
1802         pull_len = eth_get_headlen(skb->dev, va, IXGBE_RX_HDR_SIZE);
1803
1804         /* align pull length to size of long to optimize memcpy performance */
1805         skb_copy_to_linear_data(skb, va, ALIGN(pull_len, sizeof(long)));
1806
1807         /* update all of the pointers */
1808         skb_frag_size_sub(frag, pull_len);
1809         skb_frag_off_add(frag, pull_len);
1810         skb->data_len -= pull_len;
1811         skb->tail += pull_len;
1812 }
1813
1814 /**
1815  * ixgbe_dma_sync_frag - perform DMA sync for first frag of SKB
1816  * @rx_ring: rx descriptor ring packet is being transacted on
1817  * @skb: pointer to current skb being updated
1818  *
1819  * This function provides a basic DMA sync up for the first fragment of an
1820  * skb.  The reason for doing this is that the first fragment cannot be
1821  * unmapped until we have reached the end of packet descriptor for a buffer
1822  * chain.
1823  */
1824 static void ixgbe_dma_sync_frag(struct ixgbe_ring *rx_ring,
1825                                 struct sk_buff *skb)
1826 {
1827         if (ring_uses_build_skb(rx_ring)) {
1828                 unsigned long offset = (unsigned long)(skb->data) & ~PAGE_MASK;
1829
1830                 dma_sync_single_range_for_cpu(rx_ring->dev,
1831                                               IXGBE_CB(skb)->dma,
1832                                               offset,
1833                                               skb_headlen(skb),
1834                                               DMA_FROM_DEVICE);
1835         } else {
1836                 skb_frag_t *frag = &skb_shinfo(skb)->frags[0];
1837
1838                 dma_sync_single_range_for_cpu(rx_ring->dev,
1839                                               IXGBE_CB(skb)->dma,
1840                                               skb_frag_off(frag),
1841                                               skb_frag_size(frag),
1842                                               DMA_FROM_DEVICE);
1843         }
1844
1845         /* If the page was released, just unmap it. */
1846         if (unlikely(IXGBE_CB(skb)->page_released)) {
1847                 dma_unmap_page_attrs(rx_ring->dev, IXGBE_CB(skb)->dma,
1848                                      ixgbe_rx_pg_size(rx_ring),
1849                                      DMA_FROM_DEVICE,
1850                                      IXGBE_RX_DMA_ATTR);
1851         }
1852 }
1853
1854 /**
1855  * ixgbe_cleanup_headers - Correct corrupted or empty headers
1856  * @rx_ring: rx descriptor ring packet is being transacted on
1857  * @rx_desc: pointer to the EOP Rx descriptor
1858  * @skb: pointer to current skb being fixed
1859  *
1860  * Check if the skb is valid in the XDP case it will be an error pointer.
1861  * Return true in this case to abort processing and advance to next
1862  * descriptor.
1863  *
1864  * Check for corrupted packet headers caused by senders on the local L2
1865  * embedded NIC switch not setting up their Tx Descriptors right.  These
1866  * should be very rare.
1867  *
1868  * Also address the case where we are pulling data in on pages only
1869  * and as such no data is present in the skb header.
1870  *
1871  * In addition if skb is not at least 60 bytes we need to pad it so that
1872  * it is large enough to qualify as a valid Ethernet frame.
1873  *
1874  * Returns true if an error was encountered and skb was freed.
1875  **/
1876 bool ixgbe_cleanup_headers(struct ixgbe_ring *rx_ring,
1877                            union ixgbe_adv_rx_desc *rx_desc,
1878                            struct sk_buff *skb)
1879 {
1880         struct net_device *netdev = rx_ring->netdev;
1881
1882         /* XDP packets use error pointer so abort at this point */
1883         if (IS_ERR(skb))
1884                 return true;
1885
1886         /* Verify netdev is present, and that packet does not have any
1887          * errors that would be unacceptable to the netdev.
1888          */
1889         if (!netdev ||
1890             (unlikely(ixgbe_test_staterr(rx_desc,
1891                                          IXGBE_RXDADV_ERR_FRAME_ERR_MASK) &&
1892              !(netdev->features & NETIF_F_RXALL)))) {
1893                 dev_kfree_skb_any(skb);
1894                 return true;
1895         }
1896
1897         /* place header in linear portion of buffer */
1898         if (!skb_headlen(skb))
1899                 ixgbe_pull_tail(rx_ring, skb);
1900
1901 #ifdef IXGBE_FCOE
1902         /* do not attempt to pad FCoE Frames as this will disrupt DDP */
1903         if (ixgbe_rx_is_fcoe(rx_ring, rx_desc))
1904                 return false;
1905
1906 #endif
1907         /* if eth_skb_pad returns an error the skb was freed */
1908         if (eth_skb_pad(skb))
1909                 return true;
1910
1911         return false;
1912 }
1913
1914 /**
1915  * ixgbe_reuse_rx_page - page flip buffer and store it back on the ring
1916  * @rx_ring: rx descriptor ring to store buffers on
1917  * @old_buff: donor buffer to have page reused
1918  *
1919  * Synchronizes page for reuse by the adapter
1920  **/
1921 static void ixgbe_reuse_rx_page(struct ixgbe_ring *rx_ring,
1922                                 struct ixgbe_rx_buffer *old_buff)
1923 {
1924         struct ixgbe_rx_buffer *new_buff;
1925         u16 nta = rx_ring->next_to_alloc;
1926
1927         new_buff = &rx_ring->rx_buffer_info[nta];
1928
1929         /* update, and store next to alloc */
1930         nta++;
1931         rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
1932
1933         /* Transfer page from old buffer to new buffer.
1934          * Move each member individually to avoid possible store
1935          * forwarding stalls and unnecessary copy of skb.
1936          */
1937         new_buff->dma           = old_buff->dma;
1938         new_buff->page          = old_buff->page;
1939         new_buff->page_offset   = old_buff->page_offset;
1940         new_buff->pagecnt_bias  = old_buff->pagecnt_bias;
1941 }
1942
1943 static bool ixgbe_can_reuse_rx_page(struct ixgbe_rx_buffer *rx_buffer,
1944                                     int rx_buffer_pgcnt)
1945 {
1946         unsigned int pagecnt_bias = rx_buffer->pagecnt_bias;
1947         struct page *page = rx_buffer->page;
1948
1949         /* avoid re-using remote and pfmemalloc pages */
1950         if (!dev_page_is_reusable(page))
1951                 return false;
1952
1953 #if (PAGE_SIZE < 8192)
1954         /* if we are only owner of page we can reuse it */
1955         if (unlikely((rx_buffer_pgcnt - pagecnt_bias) > 1))
1956                 return false;
1957 #else
1958         /* The last offset is a bit aggressive in that we assume the
1959          * worst case of FCoE being enabled and using a 3K buffer.
1960          * However this should have minimal impact as the 1K extra is
1961          * still less than one buffer in size.
1962          */
1963 #define IXGBE_LAST_OFFSET \
1964         (SKB_WITH_OVERHEAD(PAGE_SIZE) - IXGBE_RXBUFFER_3K)
1965         if (rx_buffer->page_offset > IXGBE_LAST_OFFSET)
1966                 return false;
1967 #endif
1968
1969         /* If we have drained the page fragment pool we need to update
1970          * the pagecnt_bias and page count so that we fully restock the
1971          * number of references the driver holds.
1972          */
1973         if (unlikely(pagecnt_bias == 1)) {
1974                 page_ref_add(page, USHRT_MAX - 1);
1975                 rx_buffer->pagecnt_bias = USHRT_MAX;
1976         }
1977
1978         return true;
1979 }
1980
1981 /**
1982  * ixgbe_add_rx_frag - Add contents of Rx buffer to sk_buff
1983  * @rx_ring: rx descriptor ring to transact packets on
1984  * @rx_buffer: buffer containing page to add
1985  * @skb: sk_buff to place the data into
1986  * @size: size of data in rx_buffer
1987  *
1988  * This function will add the data contained in rx_buffer->page to the skb.
1989  * This is done either through a direct copy if the data in the buffer is
1990  * less than the skb header size, otherwise it will just attach the page as
1991  * a frag to the skb.
1992  *
1993  * The function will then update the page offset if necessary and return
1994  * true if the buffer can be reused by the adapter.
1995  **/
1996 static void ixgbe_add_rx_frag(struct ixgbe_ring *rx_ring,
1997                               struct ixgbe_rx_buffer *rx_buffer,
1998                               struct sk_buff *skb,
1999                               unsigned int size)
2000 {
2001 #if (PAGE_SIZE < 8192)
2002         unsigned int truesize = ixgbe_rx_pg_size(rx_ring) / 2;
2003 #else
2004         unsigned int truesize = rx_ring->rx_offset ?
2005                                 SKB_DATA_ALIGN(rx_ring->rx_offset + size) :
2006                                 SKB_DATA_ALIGN(size);
2007 #endif
2008         skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_buffer->page,
2009                         rx_buffer->page_offset, size, truesize);
2010 #if (PAGE_SIZE < 8192)
2011         rx_buffer->page_offset ^= truesize;
2012 #else
2013         rx_buffer->page_offset += truesize;
2014 #endif
2015 }
2016
2017 static struct ixgbe_rx_buffer *ixgbe_get_rx_buffer(struct ixgbe_ring *rx_ring,
2018                                                    union ixgbe_adv_rx_desc *rx_desc,
2019                                                    struct sk_buff **skb,
2020                                                    const unsigned int size,
2021                                                    int *rx_buffer_pgcnt)
2022 {
2023         struct ixgbe_rx_buffer *rx_buffer;
2024
2025         rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
2026         *rx_buffer_pgcnt =
2027 #if (PAGE_SIZE < 8192)
2028                 page_count(rx_buffer->page);
2029 #else
2030                 0;
2031 #endif
2032         prefetchw(rx_buffer->page);
2033         *skb = rx_buffer->skb;
2034
2035         /* Delay unmapping of the first packet. It carries the header
2036          * information, HW may still access the header after the writeback.
2037          * Only unmap it when EOP is reached
2038          */
2039         if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)) {
2040                 if (!*skb)
2041                         goto skip_sync;
2042         } else {
2043                 if (*skb)
2044                         ixgbe_dma_sync_frag(rx_ring, *skb);
2045         }
2046
2047         /* we are reusing so sync this buffer for CPU use */
2048         dma_sync_single_range_for_cpu(rx_ring->dev,
2049                                       rx_buffer->dma,
2050                                       rx_buffer->page_offset,
2051                                       size,
2052                                       DMA_FROM_DEVICE);
2053 skip_sync:
2054         rx_buffer->pagecnt_bias--;
2055
2056         return rx_buffer;
2057 }
2058
2059 static void ixgbe_put_rx_buffer(struct ixgbe_ring *rx_ring,
2060                                 struct ixgbe_rx_buffer *rx_buffer,
2061                                 struct sk_buff *skb,
2062                                 int rx_buffer_pgcnt)
2063 {
2064         if (ixgbe_can_reuse_rx_page(rx_buffer, rx_buffer_pgcnt)) {
2065                 /* hand second half of page back to the ring */
2066                 ixgbe_reuse_rx_page(rx_ring, rx_buffer);
2067         } else {
2068                 if (!IS_ERR(skb) && IXGBE_CB(skb)->dma == rx_buffer->dma) {
2069                         /* the page has been released from the ring */
2070                         IXGBE_CB(skb)->page_released = true;
2071                 } else {
2072                         /* we are not reusing the buffer so unmap it */
2073                         dma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma,
2074                                              ixgbe_rx_pg_size(rx_ring),
2075                                              DMA_FROM_DEVICE,
2076                                              IXGBE_RX_DMA_ATTR);
2077                 }
2078                 __page_frag_cache_drain(rx_buffer->page,
2079                                         rx_buffer->pagecnt_bias);
2080         }
2081
2082         /* clear contents of rx_buffer */
2083         rx_buffer->page = NULL;
2084         rx_buffer->skb = NULL;
2085 }
2086
2087 static struct sk_buff *ixgbe_construct_skb(struct ixgbe_ring *rx_ring,
2088                                            struct ixgbe_rx_buffer *rx_buffer,
2089                                            struct xdp_buff *xdp,
2090                                            union ixgbe_adv_rx_desc *rx_desc)
2091 {
2092         unsigned int size = xdp->data_end - xdp->data;
2093 #if (PAGE_SIZE < 8192)
2094         unsigned int truesize = ixgbe_rx_pg_size(rx_ring) / 2;
2095 #else
2096         unsigned int truesize = SKB_DATA_ALIGN(xdp->data_end -
2097                                                xdp->data_hard_start);
2098 #endif
2099         struct sk_buff *skb;
2100
2101         /* prefetch first cache line of first page */
2102         net_prefetch(xdp->data);
2103
2104         /* Note, we get here by enabling legacy-rx via:
2105          *
2106          *    ethtool --set-priv-flags <dev> legacy-rx on
2107          *
2108          * In this mode, we currently get 0 extra XDP headroom as
2109          * opposed to having legacy-rx off, where we process XDP
2110          * packets going to stack via ixgbe_build_skb(). The latter
2111          * provides us currently with 192 bytes of headroom.
2112          *
2113          * For ixgbe_construct_skb() mode it means that the
2114          * xdp->data_meta will always point to xdp->data, since
2115          * the helper cannot expand the head. Should this ever
2116          * change in future for legacy-rx mode on, then lets also
2117          * add xdp->data_meta handling here.
2118          */
2119
2120         /* allocate a skb to store the frags */
2121         skb = napi_alloc_skb(&rx_ring->q_vector->napi, IXGBE_RX_HDR_SIZE);
2122         if (unlikely(!skb))
2123                 return NULL;
2124
2125         if (size > IXGBE_RX_HDR_SIZE) {
2126                 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP))
2127                         IXGBE_CB(skb)->dma = rx_buffer->dma;
2128
2129                 skb_add_rx_frag(skb, 0, rx_buffer->page,
2130                                 xdp->data - page_address(rx_buffer->page),
2131                                 size, truesize);
2132 #if (PAGE_SIZE < 8192)
2133                 rx_buffer->page_offset ^= truesize;
2134 #else
2135                 rx_buffer->page_offset += truesize;
2136 #endif
2137         } else {
2138                 memcpy(__skb_put(skb, size),
2139                        xdp->data, ALIGN(size, sizeof(long)));
2140                 rx_buffer->pagecnt_bias++;
2141         }
2142
2143         return skb;
2144 }
2145
2146 static struct sk_buff *ixgbe_build_skb(struct ixgbe_ring *rx_ring,
2147                                        struct ixgbe_rx_buffer *rx_buffer,
2148                                        struct xdp_buff *xdp,
2149                                        union ixgbe_adv_rx_desc *rx_desc)
2150 {
2151         unsigned int metasize = xdp->data - xdp->data_meta;
2152 #if (PAGE_SIZE < 8192)
2153         unsigned int truesize = ixgbe_rx_pg_size(rx_ring) / 2;
2154 #else
2155         unsigned int truesize = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) +
2156                                 SKB_DATA_ALIGN(xdp->data_end -
2157                                                xdp->data_hard_start);
2158 #endif
2159         struct sk_buff *skb;
2160
2161         /* Prefetch first cache line of first page. If xdp->data_meta
2162          * is unused, this points extactly as xdp->data, otherwise we
2163          * likely have a consumer accessing first few bytes of meta
2164          * data, and then actual data.
2165          */
2166         net_prefetch(xdp->data_meta);
2167
2168         /* build an skb to around the page buffer */
2169         skb = build_skb(xdp->data_hard_start, truesize);
2170         if (unlikely(!skb))
2171                 return NULL;
2172
2173         /* update pointers within the skb to store the data */
2174         skb_reserve(skb, xdp->data - xdp->data_hard_start);
2175         __skb_put(skb, xdp->data_end - xdp->data);
2176         if (metasize)
2177                 skb_metadata_set(skb, metasize);
2178
2179         /* record DMA address if this is the start of a chain of buffers */
2180         if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP))
2181                 IXGBE_CB(skb)->dma = rx_buffer->dma;
2182
2183         /* update buffer offset */
2184 #if (PAGE_SIZE < 8192)
2185         rx_buffer->page_offset ^= truesize;
2186 #else
2187         rx_buffer->page_offset += truesize;
2188 #endif
2189
2190         return skb;
2191 }
2192
2193 static struct sk_buff *ixgbe_run_xdp(struct ixgbe_adapter *adapter,
2194                                      struct ixgbe_ring *rx_ring,
2195                                      struct xdp_buff *xdp)
2196 {
2197         int err, result = IXGBE_XDP_PASS;
2198         struct bpf_prog *xdp_prog;
2199         struct xdp_frame *xdpf;
2200         u32 act;
2201
2202         rcu_read_lock();
2203         xdp_prog = READ_ONCE(rx_ring->xdp_prog);
2204
2205         if (!xdp_prog)
2206                 goto xdp_out;
2207
2208         prefetchw(xdp->data_hard_start); /* xdp_frame write */
2209
2210         act = bpf_prog_run_xdp(xdp_prog, xdp);
2211         switch (act) {
2212         case XDP_PASS:
2213                 break;
2214         case XDP_TX:
2215                 xdpf = xdp_convert_buff_to_frame(xdp);
2216                 if (unlikely(!xdpf))
2217                         goto out_failure;
2218                 result = ixgbe_xmit_xdp_ring(adapter, xdpf);
2219                 if (result == IXGBE_XDP_CONSUMED)
2220                         goto out_failure;
2221                 break;
2222         case XDP_REDIRECT:
2223                 err = xdp_do_redirect(adapter->netdev, xdp, xdp_prog);
2224                 if (err)
2225                         goto out_failure;
2226                 result = IXGBE_XDP_REDIR;
2227                 break;
2228         default:
2229                 bpf_warn_invalid_xdp_action(act);
2230                 fallthrough;
2231         case XDP_ABORTED:
2232 out_failure:
2233                 trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
2234                 fallthrough; /* handle aborts by dropping packet */
2235         case XDP_DROP:
2236                 result = IXGBE_XDP_CONSUMED;
2237                 break;
2238         }
2239 xdp_out:
2240         rcu_read_unlock();
2241         return ERR_PTR(-result);
2242 }
2243
2244 static unsigned int ixgbe_rx_frame_truesize(struct ixgbe_ring *rx_ring,
2245                                             unsigned int size)
2246 {
2247         unsigned int truesize;
2248
2249 #if (PAGE_SIZE < 8192)
2250         truesize = ixgbe_rx_pg_size(rx_ring) / 2; /* Must be power-of-2 */
2251 #else
2252         truesize = rx_ring->rx_offset ?
2253                 SKB_DATA_ALIGN(rx_ring->rx_offset + size) +
2254                 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) :
2255                 SKB_DATA_ALIGN(size);
2256 #endif
2257         return truesize;
2258 }
2259
2260 static void ixgbe_rx_buffer_flip(struct ixgbe_ring *rx_ring,
2261                                  struct ixgbe_rx_buffer *rx_buffer,
2262                                  unsigned int size)
2263 {
2264         unsigned int truesize = ixgbe_rx_frame_truesize(rx_ring, size);
2265 #if (PAGE_SIZE < 8192)
2266         rx_buffer->page_offset ^= truesize;
2267 #else
2268         rx_buffer->page_offset += truesize;
2269 #endif
2270 }
2271
2272 /**
2273  * ixgbe_clean_rx_irq - Clean completed descriptors from Rx ring - bounce buf
2274  * @q_vector: structure containing interrupt and ring information
2275  * @rx_ring: rx descriptor ring to transact packets on
2276  * @budget: Total limit on number of packets to process
2277  *
2278  * This function provides a "bounce buffer" approach to Rx interrupt
2279  * processing.  The advantage to this is that on systems that have
2280  * expensive overhead for IOMMU access this provides a means of avoiding
2281  * it by maintaining the mapping of the page to the syste.
2282  *
2283  * Returns amount of work completed
2284  **/
2285 static int ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
2286                                struct ixgbe_ring *rx_ring,
2287                                const int budget)
2288 {
2289         unsigned int total_rx_bytes = 0, total_rx_packets = 0, frame_sz = 0;
2290         struct ixgbe_adapter *adapter = q_vector->adapter;
2291 #ifdef IXGBE_FCOE
2292         int ddp_bytes;
2293         unsigned int mss = 0;
2294 #endif /* IXGBE_FCOE */
2295         u16 cleaned_count = ixgbe_desc_unused(rx_ring);
2296         unsigned int offset = rx_ring->rx_offset;
2297         unsigned int xdp_xmit = 0;
2298         struct xdp_buff xdp;
2299
2300         /* Frame size depend on rx_ring setup when PAGE_SIZE=4K */
2301 #if (PAGE_SIZE < 8192)
2302         frame_sz = ixgbe_rx_frame_truesize(rx_ring, 0);
2303 #endif
2304         xdp_init_buff(&xdp, frame_sz, &rx_ring->xdp_rxq);
2305
2306         while (likely(total_rx_packets < budget)) {
2307                 union ixgbe_adv_rx_desc *rx_desc;
2308                 struct ixgbe_rx_buffer *rx_buffer;
2309                 struct sk_buff *skb;
2310                 int rx_buffer_pgcnt;
2311                 unsigned int size;
2312
2313                 /* return some buffers to hardware, one at a time is too slow */
2314                 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
2315                         ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
2316                         cleaned_count = 0;
2317                 }
2318
2319                 rx_desc = IXGBE_RX_DESC(rx_ring, rx_ring->next_to_clean);
2320                 size = le16_to_cpu(rx_desc->wb.upper.length);
2321                 if (!size)
2322                         break;
2323
2324                 /* This memory barrier is needed to keep us from reading
2325                  * any other fields out of the rx_desc until we know the
2326                  * descriptor has been written back
2327                  */
2328                 dma_rmb();
2329
2330                 rx_buffer = ixgbe_get_rx_buffer(rx_ring, rx_desc, &skb, size, &rx_buffer_pgcnt);
2331
2332                 /* retrieve a buffer from the ring */
2333                 if (!skb) {
2334                         unsigned char *hard_start;
2335
2336                         hard_start = page_address(rx_buffer->page) +
2337                                      rx_buffer->page_offset - offset;
2338                         xdp_prepare_buff(&xdp, hard_start, offset, size, true);
2339 #if (PAGE_SIZE > 4096)
2340                         /* At larger PAGE_SIZE, frame_sz depend on len size */
2341                         xdp.frame_sz = ixgbe_rx_frame_truesize(rx_ring, size);
2342 #endif
2343                         skb = ixgbe_run_xdp(adapter, rx_ring, &xdp);
2344                 }
2345
2346                 if (IS_ERR(skb)) {
2347                         unsigned int xdp_res = -PTR_ERR(skb);
2348
2349                         if (xdp_res & (IXGBE_XDP_TX | IXGBE_XDP_REDIR)) {
2350                                 xdp_xmit |= xdp_res;
2351                                 ixgbe_rx_buffer_flip(rx_ring, rx_buffer, size);
2352                         } else {
2353                                 rx_buffer->pagecnt_bias++;
2354                         }
2355                         total_rx_packets++;
2356                         total_rx_bytes += size;
2357                 } else if (skb) {
2358                         ixgbe_add_rx_frag(rx_ring, rx_buffer, skb, size);
2359                 } else if (ring_uses_build_skb(rx_ring)) {
2360                         skb = ixgbe_build_skb(rx_ring, rx_buffer,
2361                                               &xdp, rx_desc);
2362                 } else {
2363                         skb = ixgbe_construct_skb(rx_ring, rx_buffer,
2364                                                   &xdp, rx_desc);
2365                 }
2366
2367                 /* exit if we failed to retrieve a buffer */
2368                 if (!skb) {
2369                         rx_ring->rx_stats.alloc_rx_buff_failed++;
2370                         rx_buffer->pagecnt_bias++;
2371                         break;
2372                 }
2373
2374                 ixgbe_put_rx_buffer(rx_ring, rx_buffer, skb, rx_buffer_pgcnt);
2375                 cleaned_count++;
2376
2377                 /* place incomplete frames back on ring for completion */
2378                 if (ixgbe_is_non_eop(rx_ring, rx_desc, skb))
2379                         continue;
2380
2381                 /* verify the packet layout is correct */
2382                 if (ixgbe_cleanup_headers(rx_ring, rx_desc, skb))
2383                         continue;
2384
2385                 /* probably a little skewed due to removing CRC */
2386                 total_rx_bytes += skb->len;
2387
2388                 /* populate checksum, timestamp, VLAN, and protocol */
2389                 ixgbe_process_skb_fields(rx_ring, rx_desc, skb);
2390
2391 #ifdef IXGBE_FCOE
2392                 /* if ddp, not passing to ULD unless for FCP_RSP or error */
2393                 if (ixgbe_rx_is_fcoe(rx_ring, rx_desc)) {
2394                         ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
2395                         /* include DDPed FCoE data */
2396                         if (ddp_bytes > 0) {
2397                                 if (!mss) {
2398                                         mss = rx_ring->netdev->mtu -
2399                                                 sizeof(struct fcoe_hdr) -
2400                                                 sizeof(struct fc_frame_header) -
2401                                                 sizeof(struct fcoe_crc_eof);
2402                                         if (mss > 512)
2403                                                 mss &= ~511;
2404                                 }
2405                                 total_rx_bytes += ddp_bytes;
2406                                 total_rx_packets += DIV_ROUND_UP(ddp_bytes,
2407                                                                  mss);
2408                         }
2409                         if (!ddp_bytes) {
2410                                 dev_kfree_skb_any(skb);
2411                                 continue;
2412                         }
2413                 }
2414
2415 #endif /* IXGBE_FCOE */
2416                 ixgbe_rx_skb(q_vector, skb);
2417
2418                 /* update budget accounting */
2419                 total_rx_packets++;
2420         }
2421
2422         if (xdp_xmit & IXGBE_XDP_REDIR)
2423                 xdp_do_flush_map();
2424
2425         if (xdp_xmit & IXGBE_XDP_TX) {
2426                 struct ixgbe_ring *ring = adapter->xdp_ring[smp_processor_id()];
2427
2428                 /* Force memory writes to complete before letting h/w
2429                  * know there are new descriptors to fetch.
2430                  */
2431                 wmb();
2432                 writel(ring->next_to_use, ring->tail);
2433         }
2434
2435         u64_stats_update_begin(&rx_ring->syncp);
2436         rx_ring->stats.packets += total_rx_packets;
2437         rx_ring->stats.bytes += total_rx_bytes;
2438         u64_stats_update_end(&rx_ring->syncp);
2439         q_vector->rx.total_packets += total_rx_packets;
2440         q_vector->rx.total_bytes += total_rx_bytes;
2441
2442         return total_rx_packets;
2443 }
2444
2445 /**
2446  * ixgbe_configure_msix - Configure MSI-X hardware
2447  * @adapter: board private structure
2448  *
2449  * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
2450  * interrupts.
2451  **/
2452 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
2453 {
2454         struct ixgbe_q_vector *q_vector;
2455         int v_idx;
2456         u32 mask;
2457
2458         /* Populate MSIX to EITR Select */
2459         if (adapter->num_vfs > 32) {
2460                 u32 eitrsel = BIT(adapter->num_vfs - 32) - 1;
2461                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
2462         }
2463
2464         /*
2465          * Populate the IVAR table and set the ITR values to the
2466          * corresponding register.
2467          */
2468         for (v_idx = 0; v_idx < adapter->num_q_vectors; v_idx++) {
2469                 struct ixgbe_ring *ring;
2470                 q_vector = adapter->q_vector[v_idx];
2471
2472                 ixgbe_for_each_ring(ring, q_vector->rx)
2473                         ixgbe_set_ivar(adapter, 0, ring->reg_idx, v_idx);
2474
2475                 ixgbe_for_each_ring(ring, q_vector->tx)
2476                         ixgbe_set_ivar(adapter, 1, ring->reg_idx, v_idx);
2477
2478                 ixgbe_write_eitr(q_vector);
2479         }
2480
2481         switch (adapter->hw.mac.type) {
2482         case ixgbe_mac_82598EB:
2483                 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
2484                                v_idx);
2485                 break;
2486         case ixgbe_mac_82599EB:
2487         case ixgbe_mac_X540:
2488         case ixgbe_mac_X550:
2489         case ixgbe_mac_X550EM_x:
2490         case ixgbe_mac_x550em_a:
2491                 ixgbe_set_ivar(adapter, -1, 1, v_idx);
2492                 break;
2493         default:
2494                 break;
2495         }
2496         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
2497
2498         /* set up to autoclear timer, and the vectors */
2499         mask = IXGBE_EIMS_ENABLE_MASK;
2500         mask &= ~(IXGBE_EIMS_OTHER |
2501                   IXGBE_EIMS_MAILBOX |
2502                   IXGBE_EIMS_LSC);
2503
2504         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
2505 }
2506
2507 /**
2508  * ixgbe_update_itr - update the dynamic ITR value based on statistics
2509  * @q_vector: structure containing interrupt and ring information
2510  * @ring_container: structure containing ring performance data
2511  *
2512  *      Stores a new ITR value based on packets and byte
2513  *      counts during the last interrupt.  The advantage of per interrupt
2514  *      computation is faster updates and more accurate ITR for the current
2515  *      traffic pattern.  Constants in this function were computed
2516  *      based on theoretical maximum wire speed and thresholds were set based
2517  *      on testing data as well as attempting to minimize response time
2518  *      while increasing bulk throughput.
2519  **/
2520 static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,
2521                              struct ixgbe_ring_container *ring_container)
2522 {
2523         unsigned int itr = IXGBE_ITR_ADAPTIVE_MIN_USECS |
2524                            IXGBE_ITR_ADAPTIVE_LATENCY;
2525         unsigned int avg_wire_size, packets, bytes;
2526         unsigned long next_update = jiffies;
2527
2528         /* If we don't have any rings just leave ourselves set for maximum
2529          * possible latency so we take ourselves out of the equation.
2530          */
2531         if (!ring_container->ring)
2532                 return;
2533
2534         /* If we didn't update within up to 1 - 2 jiffies we can assume
2535          * that either packets are coming in so slow there hasn't been
2536          * any work, or that there is so much work that NAPI is dealing
2537          * with interrupt moderation and we don't need to do anything.
2538          */
2539         if (time_after(next_update, ring_container->next_update))
2540                 goto clear_counts;
2541
2542         packets = ring_container->total_packets;
2543
2544         /* We have no packets to actually measure against. This means
2545          * either one of the other queues on this vector is active or
2546          * we are a Tx queue doing TSO with too high of an interrupt rate.
2547          *
2548          * When this occurs just tick up our delay by the minimum value
2549          * and hope that this extra delay will prevent us from being called
2550          * without any work on our queue.
2551          */
2552         if (!packets) {
2553                 itr = (q_vector->itr >> 2) + IXGBE_ITR_ADAPTIVE_MIN_INC;
2554                 if (itr > IXGBE_ITR_ADAPTIVE_MAX_USECS)
2555                         itr = IXGBE_ITR_ADAPTIVE_MAX_USECS;
2556                 itr += ring_container->itr & IXGBE_ITR_ADAPTIVE_LATENCY;
2557                 goto clear_counts;
2558         }
2559
2560         bytes = ring_container->total_bytes;
2561
2562         /* If packets are less than 4 or bytes are less than 9000 assume
2563          * insufficient data to use bulk rate limiting approach. We are
2564          * likely latency driven.
2565          */
2566         if (packets < 4 && bytes < 9000) {
2567                 itr = IXGBE_ITR_ADAPTIVE_LATENCY;
2568                 goto adjust_by_size;
2569         }
2570
2571         /* Between 4 and 48 we can assume that our current interrupt delay
2572          * is only slightly too low. As such we should increase it by a small
2573          * fixed amount.
2574          */
2575         if (packets < 48) {
2576                 itr = (q_vector->itr >> 2) + IXGBE_ITR_ADAPTIVE_MIN_INC;
2577                 if (itr > IXGBE_ITR_ADAPTIVE_MAX_USECS)
2578                         itr = IXGBE_ITR_ADAPTIVE_MAX_USECS;
2579                 goto clear_counts;
2580         }
2581
2582         /* Between 48 and 96 is our "goldilocks" zone where we are working
2583          * out "just right". Just report that our current ITR is good for us.
2584          */
2585         if (packets < 96) {
2586                 itr = q_vector->itr >> 2;
2587                 goto clear_counts;
2588         }
2589
2590         /* If packet count is 96 or greater we are likely looking at a slight
2591          * overrun of the delay we want. Try halving our delay to see if that
2592          * will cut the number of packets in half per interrupt.
2593          */
2594         if (packets < 256) {
2595                 itr = q_vector->itr >> 3;
2596                 if (itr < IXGBE_ITR_ADAPTIVE_MIN_USECS)
2597                         itr = IXGBE_ITR_ADAPTIVE_MIN_USECS;
2598                 goto clear_counts;
2599         }
2600
2601         /* The paths below assume we are dealing with a bulk ITR since number
2602          * of packets is 256 or greater. We are just going to have to compute
2603          * a value and try to bring the count under control, though for smaller
2604          * packet sizes there isn't much we can do as NAPI polling will likely
2605          * be kicking in sooner rather than later.
2606          */
2607         itr = IXGBE_ITR_ADAPTIVE_BULK;
2608
2609 adjust_by_size:
2610         /* If packet counts are 256 or greater we can assume we have a gross
2611          * overestimation of what the rate should be. Instead of trying to fine
2612          * tune it just use the formula below to try and dial in an exact value
2613          * give the current packet size of the frame.
2614          */
2615         avg_wire_size = bytes / packets;
2616
2617         /* The following is a crude approximation of:
2618          *  wmem_default / (size + overhead) = desired_pkts_per_int
2619          *  rate / bits_per_byte / (size + ethernet overhead) = pkt_rate
2620          *  (desired_pkt_rate / pkt_rate) * usecs_per_sec = ITR value
2621          *
2622          * Assuming wmem_default is 212992 and overhead is 640 bytes per
2623          * packet, (256 skb, 64 headroom, 320 shared info), we can reduce the
2624          * formula down to
2625          *
2626          *  (170 * (size + 24)) / (size + 640) = ITR
2627          *
2628          * We first do some math on the packet size and then finally bitshift
2629          * by 8 after rounding up. We also have to account for PCIe link speed
2630          * difference as ITR scales based on this.
2631          */
2632         if (avg_wire_size <= 60) {
2633                 /* Start at 50k ints/sec */
2634                 avg_wire_size = 5120;
2635         } else if (avg_wire_size <= 316) {
2636                 /* 50K ints/sec to 16K ints/sec */
2637                 avg_wire_size *= 40;
2638                 avg_wire_size += 2720;
2639         } else if (avg_wire_size <= 1084) {
2640                 /* 16K ints/sec to 9.2K ints/sec */
2641                 avg_wire_size *= 15;
2642                 avg_wire_size += 11452;
2643         } else if (avg_wire_size < 1968) {
2644                 /* 9.2K ints/sec to 8K ints/sec */
2645                 avg_wire_size *= 5;
2646                 avg_wire_size += 22420;
2647         } else {
2648                 /* plateau at a limit of 8K ints/sec */
2649                 avg_wire_size = 32256;
2650         }
2651
2652         /* If we are in low latency mode half our delay which doubles the rate
2653          * to somewhere between 100K to 16K ints/sec
2654          */
2655         if (itr & IXGBE_ITR_ADAPTIVE_LATENCY)
2656                 avg_wire_size >>= 1;
2657
2658         /* Resultant value is 256 times larger than it needs to be. This
2659          * gives us room to adjust the value as needed to either increase
2660          * or decrease the value based on link speeds of 10G, 2.5G, 1G, etc.
2661          *
2662          * Use addition as we have already recorded the new latency flag
2663          * for the ITR value.
2664          */
2665         switch (q_vector->adapter->link_speed) {
2666         case IXGBE_LINK_SPEED_10GB_FULL:
2667         case IXGBE_LINK_SPEED_100_FULL:
2668         default:
2669                 itr += DIV_ROUND_UP(avg_wire_size,
2670                                     IXGBE_ITR_ADAPTIVE_MIN_INC * 256) *
2671                        IXGBE_ITR_ADAPTIVE_MIN_INC;
2672                 break;
2673         case IXGBE_LINK_SPEED_2_5GB_FULL:
2674         case IXGBE_LINK_SPEED_1GB_FULL:
2675         case IXGBE_LINK_SPEED_10_FULL:
2676                 if (avg_wire_size > 8064)
2677                         avg_wire_size = 8064;
2678                 itr += DIV_ROUND_UP(avg_wire_size,
2679                                     IXGBE_ITR_ADAPTIVE_MIN_INC * 64) *
2680                        IXGBE_ITR_ADAPTIVE_MIN_INC;
2681                 break;
2682         }
2683
2684 clear_counts:
2685         /* write back value */
2686         ring_container->itr = itr;
2687
2688         /* next update should occur within next jiffy */
2689         ring_container->next_update = next_update + 1;
2690
2691         ring_container->total_bytes = 0;
2692         ring_container->total_packets = 0;
2693 }
2694
2695 /**
2696  * ixgbe_write_eitr - write EITR register in hardware specific way
2697  * @q_vector: structure containing interrupt and ring information
2698  *
2699  * This function is made to be called by ethtool and by the driver
2700  * when it needs to update EITR registers at runtime.  Hardware
2701  * specific quirks/differences are taken care of here.
2702  */
2703 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
2704 {
2705         struct ixgbe_adapter *adapter = q_vector->adapter;
2706         struct ixgbe_hw *hw = &adapter->hw;
2707         int v_idx = q_vector->v_idx;
2708         u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
2709
2710         switch (adapter->hw.mac.type) {
2711         case ixgbe_mac_82598EB:
2712                 /* must write high and low 16 bits to reset counter */
2713                 itr_reg |= (itr_reg << 16);
2714                 break;
2715         case ixgbe_mac_82599EB:
2716         case ixgbe_mac_X540:
2717         case ixgbe_mac_X550:
2718         case ixgbe_mac_X550EM_x:
2719         case ixgbe_mac_x550em_a:
2720                 /*
2721                  * set the WDIS bit to not clear the timer bits and cause an
2722                  * immediate assertion of the interrupt
2723                  */
2724                 itr_reg |= IXGBE_EITR_CNT_WDIS;
2725                 break;
2726         default:
2727                 break;
2728         }
2729         IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
2730 }
2731
2732 static void ixgbe_set_itr(struct ixgbe_q_vector *q_vector)
2733 {
2734         u32 new_itr;
2735
2736         ixgbe_update_itr(q_vector, &q_vector->tx);
2737         ixgbe_update_itr(q_vector, &q_vector->rx);
2738
2739         /* use the smallest value of new ITR delay calculations */
2740         new_itr = min(q_vector->rx.itr, q_vector->tx.itr);
2741
2742         /* Clear latency flag if set, shift into correct position */
2743         new_itr &= ~IXGBE_ITR_ADAPTIVE_LATENCY;
2744         new_itr <<= 2;
2745
2746         if (new_itr != q_vector->itr) {
2747                 /* save the algorithm value here */
2748                 q_vector->itr = new_itr;
2749
2750                 ixgbe_write_eitr(q_vector);
2751         }
2752 }
2753
2754 /**
2755  * ixgbe_check_overtemp_subtask - check for over temperature
2756  * @adapter: pointer to adapter
2757  **/
2758 static void ixgbe_check_overtemp_subtask(struct ixgbe_adapter *adapter)
2759 {
2760         struct ixgbe_hw *hw = &adapter->hw;
2761         u32 eicr = adapter->interrupt_event;
2762         s32 rc;
2763
2764         if (test_bit(__IXGBE_DOWN, &adapter->state))
2765                 return;
2766
2767         if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_EVENT))
2768                 return;
2769
2770         adapter->flags2 &= ~IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2771
2772         switch (hw->device_id) {
2773         case IXGBE_DEV_ID_82599_T3_LOM:
2774                 /*
2775                  * Since the warning interrupt is for both ports
2776                  * we don't have to check if:
2777                  *  - This interrupt wasn't for our port.
2778                  *  - We may have missed the interrupt so always have to
2779                  *    check if we  got a LSC
2780                  */
2781                 if (!(eicr & IXGBE_EICR_GPI_SDP0_8259X) &&
2782                     !(eicr & IXGBE_EICR_LSC))
2783                         return;
2784
2785                 if (!(eicr & IXGBE_EICR_LSC) && hw->mac.ops.check_link) {
2786                         u32 speed;
2787                         bool link_up = false;
2788
2789                         hw->mac.ops.check_link(hw, &speed, &link_up, false);
2790
2791                         if (link_up)
2792                                 return;
2793                 }
2794
2795                 /* Check if this is not due to overtemp */
2796                 if (hw->phy.ops.check_overtemp(hw) != IXGBE_ERR_OVERTEMP)
2797                         return;
2798
2799                 break;
2800         case IXGBE_DEV_ID_X550EM_A_1G_T:
2801         case IXGBE_DEV_ID_X550EM_A_1G_T_L:
2802                 rc = hw->phy.ops.check_overtemp(hw);
2803                 if (rc != IXGBE_ERR_OVERTEMP)
2804                         return;
2805                 break;
2806         default:
2807                 if (adapter->hw.mac.type >= ixgbe_mac_X540)
2808                         return;
2809                 if (!(eicr & IXGBE_EICR_GPI_SDP0(hw)))
2810                         return;
2811                 break;
2812         }
2813         e_crit(drv, "%s\n", ixgbe_overheat_msg);
2814
2815         adapter->interrupt_event = 0;
2816 }
2817
2818 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
2819 {
2820         struct ixgbe_hw *hw = &adapter->hw;
2821
2822         if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
2823             (eicr & IXGBE_EICR_GPI_SDP1(hw))) {
2824                 e_crit(probe, "Fan has stopped, replace the adapter\n");
2825                 /* write to clear the interrupt */
2826                 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1(hw));
2827         }
2828 }
2829
2830 static void ixgbe_check_overtemp_event(struct ixgbe_adapter *adapter, u32 eicr)
2831 {
2832         struct ixgbe_hw *hw = &adapter->hw;
2833
2834         if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE))
2835                 return;
2836
2837         switch (adapter->hw.mac.type) {
2838         case ixgbe_mac_82599EB:
2839                 /*
2840                  * Need to check link state so complete overtemp check
2841                  * on service task
2842                  */
2843                 if (((eicr & IXGBE_EICR_GPI_SDP0(hw)) ||
2844                      (eicr & IXGBE_EICR_LSC)) &&
2845                     (!test_bit(__IXGBE_DOWN, &adapter->state))) {
2846                         adapter->interrupt_event = eicr;
2847                         adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2848                         ixgbe_service_event_schedule(adapter);
2849                         return;
2850                 }
2851                 return;
2852         case ixgbe_mac_x550em_a:
2853                 if (eicr & IXGBE_EICR_GPI_SDP0_X550EM_a) {
2854                         adapter->interrupt_event = eicr;
2855                         adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2856                         ixgbe_service_event_schedule(adapter);
2857                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC,
2858                                         IXGBE_EICR_GPI_SDP0_X550EM_a);
2859                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICR,
2860                                         IXGBE_EICR_GPI_SDP0_X550EM_a);
2861                 }
2862                 return;
2863         case ixgbe_mac_X550:
2864         case ixgbe_mac_X540:
2865                 if (!(eicr & IXGBE_EICR_TS))
2866                         return;
2867                 break;
2868         default:
2869                 return;
2870         }
2871
2872         e_crit(drv, "%s\n", ixgbe_overheat_msg);
2873 }
2874
2875 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
2876 {
2877         switch (hw->mac.type) {
2878         case ixgbe_mac_82598EB:
2879                 if (hw->phy.type == ixgbe_phy_nl)
2880                         return true;
2881                 return false;
2882         case ixgbe_mac_82599EB:
2883         case ixgbe_mac_X550EM_x:
2884         case ixgbe_mac_x550em_a:
2885                 switch (hw->mac.ops.get_media_type(hw)) {
2886                 case ixgbe_media_type_fiber:
2887                 case ixgbe_media_type_fiber_qsfp:
2888                         return true;
2889                 default:
2890                         return false;
2891                 }
2892         default:
2893                 return false;
2894         }
2895 }
2896
2897 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
2898 {
2899         struct ixgbe_hw *hw = &adapter->hw;
2900         u32 eicr_mask = IXGBE_EICR_GPI_SDP2(hw);
2901
2902         if (!ixgbe_is_sfp(hw))
2903                 return;
2904
2905         /* Later MAC's use different SDP */
2906         if (hw->mac.type >= ixgbe_mac_X540)
2907                 eicr_mask = IXGBE_EICR_GPI_SDP0_X540;
2908
2909         if (eicr & eicr_mask) {
2910                 /* Clear the interrupt */
2911                 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr_mask);
2912                 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2913                         adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
2914                         adapter->sfp_poll_time = 0;
2915                         ixgbe_service_event_schedule(adapter);
2916                 }
2917         }
2918
2919         if (adapter->hw.mac.type == ixgbe_mac_82599EB &&
2920             (eicr & IXGBE_EICR_GPI_SDP1(hw))) {
2921                 /* Clear the interrupt */
2922                 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1(hw));
2923                 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2924                         adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
2925                         ixgbe_service_event_schedule(adapter);
2926                 }
2927         }
2928 }
2929
2930 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
2931 {
2932         struct ixgbe_hw *hw = &adapter->hw;
2933
2934         adapter->lsc_int++;
2935         adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
2936         adapter->link_check_timeout = jiffies;
2937         if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2938                 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
2939                 IXGBE_WRITE_FLUSH(hw);
2940                 ixgbe_service_event_schedule(adapter);
2941         }
2942 }
2943
2944 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
2945                                            u64 qmask)
2946 {
2947         u32 mask;
2948         struct ixgbe_hw *hw = &adapter->hw;
2949
2950         switch (hw->mac.type) {
2951         case ixgbe_mac_82598EB:
2952                 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
2953                 IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);
2954                 break;
2955         case ixgbe_mac_82599EB:
2956         case ixgbe_mac_X540:
2957         case ixgbe_mac_X550:
2958         case ixgbe_mac_X550EM_x:
2959         case ixgbe_mac_x550em_a:
2960                 mask = (qmask & 0xFFFFFFFF);
2961                 if (mask)
2962                         IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask);
2963                 mask = (qmask >> 32);
2964                 if (mask)
2965                         IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask);
2966                 break;
2967         default:
2968                 break;
2969         }
2970         /* skip the flush */
2971 }
2972
2973 /**
2974  * ixgbe_irq_enable - Enable default interrupt generation settings
2975  * @adapter: board private structure
2976  * @queues: enable irqs for queues
2977  * @flush: flush register write
2978  **/
2979 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
2980                                     bool flush)
2981 {
2982         struct ixgbe_hw *hw = &adapter->hw;
2983         u32 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
2984
2985         /* don't reenable LSC while waiting for link */
2986         if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
2987                 mask &= ~IXGBE_EIMS_LSC;
2988
2989         if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
2990                 switch (adapter->hw.mac.type) {
2991                 case ixgbe_mac_82599EB:
2992                         mask |= IXGBE_EIMS_GPI_SDP0(hw);
2993                         break;
2994                 case ixgbe_mac_X540:
2995                 case ixgbe_mac_X550:
2996                 case ixgbe_mac_X550EM_x:
2997                 case ixgbe_mac_x550em_a:
2998                         mask |= IXGBE_EIMS_TS;
2999                         break;
3000                 default:
3001                         break;
3002                 }
3003         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
3004                 mask |= IXGBE_EIMS_GPI_SDP1(hw);
3005         switch (adapter->hw.mac.type) {
3006         case ixgbe_mac_82599EB:
3007                 mask |= IXGBE_EIMS_GPI_SDP1(hw);
3008                 mask |= IXGBE_EIMS_GPI_SDP2(hw);
3009                 fallthrough;
3010         case ixgbe_mac_X540:
3011         case ixgbe_mac_X550:
3012         case ixgbe_mac_X550EM_x:
3013         case ixgbe_mac_x550em_a:
3014                 if (adapter->hw.device_id == IXGBE_DEV_ID_X550EM_X_SFP ||
3015                     adapter->hw.device_id == IXGBE_DEV_ID_X550EM_A_SFP ||
3016                     adapter->hw.device_id == IXGBE_DEV_ID_X550EM_A_SFP_N)
3017                         mask |= IXGBE_EIMS_GPI_SDP0(&adapter->hw);
3018                 if (adapter->hw.phy.type == ixgbe_phy_x550em_ext_t)
3019                         mask |= IXGBE_EICR_GPI_SDP0_X540;
3020                 mask |= IXGBE_EIMS_ECC;
3021                 mask |= IXGBE_EIMS_MAILBOX;
3022                 break;
3023         default:
3024                 break;
3025         }
3026
3027         if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
3028             !(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
3029                 mask |= IXGBE_EIMS_FLOW_DIR;
3030
3031         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
3032         if (queues)
3033                 ixgbe_irq_enable_queues(adapter, ~0);
3034         if (flush)
3035                 IXGBE_WRITE_FLUSH(&adapter->hw);
3036 }
3037
3038 static irqreturn_t ixgbe_msix_other(int irq, void *data)
3039 {
3040         struct ixgbe_adapter *adapter = data;
3041         struct ixgbe_hw *hw = &adapter->hw;
3042         u32 eicr;
3043
3044         /*
3045          * Workaround for Silicon errata.  Use clear-by-write instead
3046          * of clear-by-read.  Reading with EICS will return the
3047          * interrupt causes without clearing, which later be done
3048          * with the write to EICR.
3049          */
3050         eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
3051
3052         /* The lower 16bits of the EICR register are for the queue interrupts
3053          * which should be masked here in order to not accidentally clear them if
3054          * the bits are high when ixgbe_msix_other is called. There is a race
3055          * condition otherwise which results in possible performance loss
3056          * especially if the ixgbe_msix_other interrupt is triggering
3057          * consistently (as it would when PPS is turned on for the X540 device)
3058          */
3059         eicr &= 0xFFFF0000;
3060
3061         IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
3062
3063         if (eicr & IXGBE_EICR_LSC)
3064                 ixgbe_check_lsc(adapter);
3065
3066         if (eicr & IXGBE_EICR_MAILBOX)
3067                 ixgbe_msg_task(adapter);
3068
3069         switch (hw->mac.type) {
3070         case ixgbe_mac_82599EB:
3071         case ixgbe_mac_X540:
3072         case ixgbe_mac_X550:
3073         case ixgbe_mac_X550EM_x:
3074         case ixgbe_mac_x550em_a:
3075                 if (hw->phy.type == ixgbe_phy_x550em_ext_t &&
3076                     (eicr & IXGBE_EICR_GPI_SDP0_X540)) {
3077                         adapter->flags2 |= IXGBE_FLAG2_PHY_INTERRUPT;
3078                         ixgbe_service_event_schedule(adapter);
3079                         IXGBE_WRITE_REG(hw, IXGBE_EICR,
3080                                         IXGBE_EICR_GPI_SDP0_X540);
3081                 }
3082                 if (eicr & IXGBE_EICR_ECC) {
3083                         e_info(link, "Received ECC Err, initiating reset\n");
3084                         set_bit(__IXGBE_RESET_REQUESTED, &adapter->state);
3085                         ixgbe_service_event_schedule(adapter);
3086                         IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_ECC);
3087                 }
3088                 /* Handle Flow Director Full threshold interrupt */
3089                 if (eicr & IXGBE_EICR_FLOW_DIR) {
3090                         int reinit_count = 0;
3091                         int i;
3092                         for (i = 0; i < adapter->num_tx_queues; i++) {
3093                                 struct ixgbe_ring *ring = adapter->tx_ring[i];
3094                                 if (test_and_clear_bit(__IXGBE_TX_FDIR_INIT_DONE,
3095                                                        &ring->state))
3096                                         reinit_count++;
3097                         }
3098                         if (reinit_count) {
3099                                 /* no more flow director interrupts until after init */
3100                                 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_FLOW_DIR);
3101                                 adapter->flags2 |= IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
3102                                 ixgbe_service_event_schedule(adapter);
3103                         }
3104                 }
3105                 ixgbe_check_sfp_event(adapter, eicr);
3106                 ixgbe_check_overtemp_event(adapter, eicr);
3107                 break;
3108         default:
3109                 break;
3110         }
3111
3112         ixgbe_check_fan_failure(adapter, eicr);
3113
3114         if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
3115                 ixgbe_ptp_check_pps_event(adapter);
3116
3117         /* re-enable the original interrupt state, no lsc, no queues */
3118         if (!test_bit(__IXGBE_DOWN, &adapter->state))
3119                 ixgbe_irq_enable(adapter, false, false);
3120
3121         return IRQ_HANDLED;
3122 }
3123
3124 static irqreturn_t ixgbe_msix_clean_rings(int irq, void *data)
3125 {
3126         struct ixgbe_q_vector *q_vector = data;
3127
3128         /* EIAM disabled interrupts (on this vector) for us */
3129
3130         if (q_vector->rx.ring || q_vector->tx.ring)
3131                 napi_schedule_irqoff(&q_vector->napi);
3132
3133         return IRQ_HANDLED;
3134 }
3135
3136 /**
3137  * ixgbe_poll - NAPI Rx polling callback
3138  * @napi: structure for representing this polling device
3139  * @budget: how many packets driver is allowed to clean
3140  *
3141  * This function is used for legacy and MSI, NAPI mode
3142  **/
3143 int ixgbe_poll(struct napi_struct *napi, int budget)
3144 {
3145         struct ixgbe_q_vector *q_vector =
3146                                 container_of(napi, struct ixgbe_q_vector, napi);
3147         struct ixgbe_adapter *adapter = q_vector->adapter;
3148         struct ixgbe_ring *ring;
3149         int per_ring_budget, work_done = 0;
3150         bool clean_complete = true;
3151
3152 #ifdef CONFIG_IXGBE_DCA
3153         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
3154                 ixgbe_update_dca(q_vector);
3155 #endif
3156
3157         ixgbe_for_each_ring(ring, q_vector->tx) {
3158                 bool wd = ring->xsk_pool ?
3159                           ixgbe_clean_xdp_tx_irq(q_vector, ring, budget) :
3160                           ixgbe_clean_tx_irq(q_vector, ring, budget);
3161
3162                 if (!wd)
3163                         clean_complete = false;
3164         }
3165
3166         /* Exit if we are called by netpoll */
3167         if (budget <= 0)
3168                 return budget;
3169
3170         /* attempt to distribute budget to each queue fairly, but don't allow
3171          * the budget to go below 1 because we'll exit polling */
3172         if (q_vector->rx.count > 1)
3173                 per_ring_budget = max(budget/q_vector->rx.count, 1);
3174         else
3175                 per_ring_budget = budget;
3176
3177         ixgbe_for_each_ring(ring, q_vector->rx) {
3178                 int cleaned = ring->xsk_pool ?
3179                               ixgbe_clean_rx_irq_zc(q_vector, ring,
3180                                                     per_ring_budget) :
3181                               ixgbe_clean_rx_irq(q_vector, ring,
3182                                                  per_ring_budget);
3183
3184                 work_done += cleaned;
3185                 if (cleaned >= per_ring_budget)
3186                         clean_complete = false;
3187         }
3188
3189         /* If all work not completed, return budget and keep polling */
3190         if (!clean_complete)
3191                 return budget;
3192
3193         /* all work done, exit the polling mode */
3194         if (likely(napi_complete_done(napi, work_done))) {
3195                 if (adapter->rx_itr_setting & 1)
3196                         ixgbe_set_itr(q_vector);
3197                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3198                         ixgbe_irq_enable_queues(adapter,
3199                                                 BIT_ULL(q_vector->v_idx));
3200         }
3201
3202         return min(work_done, budget - 1);
3203 }
3204
3205 /**
3206  * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
3207  * @adapter: board private structure
3208  *
3209  * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
3210  * interrupts from the kernel.
3211  **/
3212 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
3213 {
3214         struct net_device *netdev = adapter->netdev;
3215         unsigned int ri = 0, ti = 0;
3216         int vector, err;
3217
3218         for (vector = 0; vector < adapter->num_q_vectors; vector++) {
3219                 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
3220                 struct msix_entry *entry = &adapter->msix_entries[vector];
3221
3222                 if (q_vector->tx.ring && q_vector->rx.ring) {
3223                         snprintf(q_vector->name, sizeof(q_vector->name),
3224                                  "%s-TxRx-%u", netdev->name, ri++);
3225                         ti++;
3226                 } else if (q_vector->rx.ring) {
3227                         snprintf(q_vector->name, sizeof(q_vector->name),
3228                                  "%s-rx-%u", netdev->name, ri++);
3229                 } else if (q_vector->tx.ring) {
3230                         snprintf(q_vector->name, sizeof(q_vector->name),
3231                                  "%s-tx-%u", netdev->name, ti++);
3232                 } else {
3233                         /* skip this unused q_vector */
3234                         continue;
3235                 }
3236                 err = request_irq(entry->vector, &ixgbe_msix_clean_rings, 0,
3237                                   q_vector->name, q_vector);
3238                 if (err) {
3239                         e_err(probe, "request_irq failed for MSIX interrupt "
3240                               "Error: %d\n", err);
3241                         goto free_queue_irqs;
3242                 }
3243                 /* If Flow Director is enabled, set interrupt affinity */
3244                 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3245                         /* assign the mask for this irq */
3246                         irq_set_affinity_hint(entry->vector,
3247                                               &q_vector->affinity_mask);
3248                 }
3249         }
3250
3251         err = request_irq(adapter->msix_entries[vector].vector,
3252                           ixgbe_msix_other, 0, netdev->name, adapter);
3253         if (err) {
3254                 e_err(probe, "request_irq for msix_other failed: %d\n", err);
3255                 goto free_queue_irqs;
3256         }
3257
3258         return 0;
3259
3260 free_queue_irqs:
3261         while (vector) {
3262                 vector--;
3263                 irq_set_affinity_hint(adapter->msix_entries[vector].vector,
3264                                       NULL);
3265                 free_irq(adapter->msix_entries[vector].vector,
3266                          adapter->q_vector[vector]);
3267         }
3268         adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3269         pci_disable_msix(adapter->pdev);
3270         kfree(adapter->msix_entries);
3271         adapter->msix_entries = NULL;
3272         return err;
3273 }
3274
3275 /**
3276  * ixgbe_intr - legacy mode Interrupt Handler
3277  * @irq: interrupt number
3278  * @data: pointer to a network interface device structure
3279  **/
3280 static irqreturn_t ixgbe_intr(int irq, void *data)
3281 {
3282         struct ixgbe_adapter *adapter = data;
3283         struct ixgbe_hw *hw = &adapter->hw;
3284         struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
3285         u32 eicr;
3286
3287         /*
3288          * Workaround for silicon errata #26 on 82598.  Mask the interrupt
3289          * before the read of EICR.
3290          */
3291         IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
3292
3293         /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
3294          * therefore no explicit interrupt disable is necessary */
3295         eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
3296         if (!eicr) {
3297                 /*
3298                  * shared interrupt alert!
3299                  * make sure interrupts are enabled because the read will
3300                  * have disabled interrupts due to EIAM
3301                  * finish the workaround of silicon errata on 82598.  Unmask
3302                  * the interrupt that we masked before the EICR read.
3303                  */
3304                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3305                         ixgbe_irq_enable(adapter, true, true);
3306                 return IRQ_NONE;        /* Not our interrupt */
3307         }
3308
3309         if (eicr & IXGBE_EICR_LSC)
3310                 ixgbe_check_lsc(adapter);
3311
3312         switch (hw->mac.type) {
3313         case ixgbe_mac_82599EB:
3314                 ixgbe_check_sfp_event(adapter, eicr);
3315                 fallthrough;
3316         case ixgbe_mac_X540:
3317         case ixgbe_mac_X550:
3318         case ixgbe_mac_X550EM_x:
3319         case ixgbe_mac_x550em_a:
3320                 if (eicr & IXGBE_EICR_ECC) {
3321                         e_info(link, "Received ECC Err, initiating reset\n");
3322                         set_bit(__IXGBE_RESET_REQUESTED, &adapter->state);
3323                         ixgbe_service_event_schedule(adapter);
3324                         IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_ECC);
3325                 }
3326                 ixgbe_check_overtemp_event(adapter, eicr);
3327                 break;
3328         default:
3329                 break;
3330         }
3331
3332         ixgbe_check_fan_failure(adapter, eicr);
3333         if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
3334                 ixgbe_ptp_check_pps_event(adapter);
3335
3336         /* would disable interrupts here but EIAM disabled it */
3337         napi_schedule_irqoff(&q_vector->napi);
3338
3339         /*
3340          * re-enable link(maybe) and non-queue interrupts, no flush.
3341          * ixgbe_poll will re-enable the queue interrupts
3342          */
3343         if (!test_bit(__IXGBE_DOWN, &adapter->state))
3344                 ixgbe_irq_enable(adapter, false, false);
3345
3346         return IRQ_HANDLED;
3347 }
3348
3349 /**
3350  * ixgbe_request_irq - initialize interrupts
3351  * @adapter: board private structure
3352  *
3353  * Attempts to configure interrupts using the best available
3354  * capabilities of the hardware and kernel.
3355  **/
3356 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
3357 {
3358         struct net_device *netdev = adapter->netdev;
3359         int err;
3360
3361         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3362                 err = ixgbe_request_msix_irqs(adapter);
3363         else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED)
3364                 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
3365                                   netdev->name, adapter);
3366         else
3367                 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
3368                                   netdev->name, adapter);
3369
3370         if (err)
3371                 e_err(probe, "request_irq failed, Error %d\n", err);
3372
3373         return err;
3374 }
3375
3376 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
3377 {
3378         int vector;
3379
3380         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
3381                 free_irq(adapter->pdev->irq, adapter);
3382                 return;
3383         }
3384
3385         if (!adapter->msix_entries)
3386                 return;
3387
3388         for (vector = 0; vector < adapter->num_q_vectors; vector++) {
3389                 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
3390                 struct msix_entry *entry = &adapter->msix_entries[vector];
3391
3392                 /* free only the irqs that were actually requested */
3393                 if (!q_vector->rx.ring && !q_vector->tx.ring)
3394                         continue;
3395
3396                 /* clear the affinity_mask in the IRQ descriptor */
3397                 irq_set_affinity_hint(entry->vector, NULL);
3398
3399                 free_irq(entry->vector, q_vector);
3400         }
3401
3402         free_irq(adapter->msix_entries[vector].vector, adapter);
3403 }
3404
3405 /**
3406  * ixgbe_irq_disable - Mask off interrupt generation on the NIC
3407  * @adapter: board private structure
3408  **/
3409 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
3410 {
3411         switch (adapter->hw.mac.type) {
3412         case ixgbe_mac_82598EB:
3413                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
3414                 break;
3415         case ixgbe_mac_82599EB:
3416         case ixgbe_mac_X540:
3417         case ixgbe_mac_X550:
3418         case ixgbe_mac_X550EM_x:
3419         case ixgbe_mac_x550em_a:
3420                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
3421                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
3422                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
3423                 break;
3424         default:
3425                 break;
3426         }
3427         IXGBE_WRITE_FLUSH(&adapter->hw);
3428         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3429                 int vector;
3430
3431                 for (vector = 0; vector < adapter->num_q_vectors; vector++)
3432                         synchronize_irq(adapter->msix_entries[vector].vector);
3433
3434                 synchronize_irq(adapter->msix_entries[vector++].vector);
3435         } else {
3436                 synchronize_irq(adapter->pdev->irq);
3437         }
3438 }
3439
3440 /**
3441  * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
3442  * @adapter: board private structure
3443  *
3444  **/
3445 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
3446 {
3447         struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
3448
3449         ixgbe_write_eitr(q_vector);
3450
3451         ixgbe_set_ivar(adapter, 0, 0, 0);
3452         ixgbe_set_ivar(adapter, 1, 0, 0);
3453
3454         e_info(hw, "Legacy interrupt IVAR setup done\n");
3455 }
3456
3457 /**
3458  * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
3459  * @adapter: board private structure
3460  * @ring: structure containing ring specific data
3461  *
3462  * Configure the Tx descriptor ring after a reset.
3463  **/
3464 void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
3465                              struct ixgbe_ring *ring)
3466 {
3467         struct ixgbe_hw *hw = &adapter->hw;
3468         u64 tdba = ring->dma;
3469         int wait_loop = 10;
3470         u32 txdctl = IXGBE_TXDCTL_ENABLE;
3471         u8 reg_idx = ring->reg_idx;
3472
3473         ring->xsk_pool = NULL;
3474         if (ring_is_xdp(ring))
3475                 ring->xsk_pool = ixgbe_xsk_pool(adapter, ring);
3476
3477         /* disable queue to avoid issues while updating state */
3478         IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), 0);
3479         IXGBE_WRITE_FLUSH(hw);
3480
3481         IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
3482                         (tdba & DMA_BIT_MASK(32)));
3483         IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
3484         IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
3485                         ring->count * sizeof(union ixgbe_adv_tx_desc));
3486         IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
3487         IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
3488         ring->tail = adapter->io_addr + IXGBE_TDT(reg_idx);
3489
3490         /*
3491          * set WTHRESH to encourage burst writeback, it should not be set
3492          * higher than 1 when:
3493          * - ITR is 0 as it could cause false TX hangs
3494          * - ITR is set to > 100k int/sec and BQL is enabled
3495          *
3496          * In order to avoid issues WTHRESH + PTHRESH should always be equal
3497          * to or less than the number of on chip descriptors, which is
3498          * currently 40.
3499          */
3500         if (!ring->q_vector || (ring->q_vector->itr < IXGBE_100K_ITR))
3501                 txdctl |= 1u << 16;     /* WTHRESH = 1 */
3502         else
3503                 txdctl |= 8u << 16;     /* WTHRESH = 8 */
3504
3505         /*
3506          * Setting PTHRESH to 32 both improves performance
3507          * and avoids a TX hang with DFP enabled
3508          */
3509         txdctl |= (1u << 8) |   /* HTHRESH = 1 */
3510                    32;          /* PTHRESH = 32 */
3511
3512         /* reinitialize flowdirector state */
3513         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3514                 ring->atr_sample_rate = adapter->atr_sample_rate;
3515                 ring->atr_count = 0;
3516                 set_bit(__IXGBE_TX_FDIR_INIT_DONE, &ring->state);
3517         } else {
3518                 ring->atr_sample_rate = 0;
3519         }
3520
3521         /* initialize XPS */
3522         if (!test_and_set_bit(__IXGBE_TX_XPS_INIT_DONE, &ring->state)) {
3523                 struct ixgbe_q_vector *q_vector = ring->q_vector;
3524
3525                 if (q_vector)
3526                         netif_set_xps_queue(ring->netdev,
3527                                             &q_vector->affinity_mask,
3528                                             ring->queue_index);
3529         }
3530
3531         clear_bit(__IXGBE_HANG_CHECK_ARMED, &ring->state);
3532
3533         /* reinitialize tx_buffer_info */
3534         memset(ring->tx_buffer_info, 0,
3535                sizeof(struct ixgbe_tx_buffer) * ring->count);
3536
3537         /* enable queue */
3538         IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
3539
3540         /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
3541         if (hw->mac.type == ixgbe_mac_82598EB &&
3542             !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3543                 return;
3544
3545         /* poll to verify queue is enabled */
3546         do {
3547                 usleep_range(1000, 2000);
3548                 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
3549         } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
3550         if (!wait_loop)
3551                 hw_dbg(hw, "Could not enable Tx Queue %d\n", reg_idx);
3552 }
3553
3554 static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
3555 {
3556         struct ixgbe_hw *hw = &adapter->hw;
3557         u32 rttdcs, mtqc;
3558         u8 tcs = adapter->hw_tcs;
3559
3560         if (hw->mac.type == ixgbe_mac_82598EB)
3561                 return;
3562
3563         /* disable the arbiter while setting MTQC */
3564         rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
3565         rttdcs |= IXGBE_RTTDCS_ARBDIS;
3566         IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
3567
3568         /* set transmit pool layout */
3569         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3570                 mtqc = IXGBE_MTQC_VT_ENA;
3571                 if (tcs > 4)
3572                         mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
3573                 else if (tcs > 1)
3574                         mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
3575                 else if (adapter->ring_feature[RING_F_VMDQ].mask ==
3576                          IXGBE_82599_VMDQ_4Q_MASK)
3577                         mtqc |= IXGBE_MTQC_32VF;
3578                 else
3579                         mtqc |= IXGBE_MTQC_64VF;
3580         } else {
3581                 if (tcs > 4) {
3582                         mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
3583                 } else if (tcs > 1) {
3584                         mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
3585                 } else {
3586                         u8 max_txq = adapter->num_tx_queues +
3587                                 adapter->num_xdp_queues;
3588                         if (max_txq > 63)
3589                                 mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
3590                         else
3591                                 mtqc = IXGBE_MTQC_64Q_1PB;
3592                 }
3593         }
3594
3595         IXGBE_WRITE_REG(hw, IXGBE_MTQC, mtqc);
3596
3597         /* Enable Security TX Buffer IFG for multiple pb */
3598         if (tcs) {
3599                 u32 sectx = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG);
3600                 sectx |= IXGBE_SECTX_DCB;
3601                 IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, sectx);
3602         }
3603
3604         /* re-enable the arbiter */
3605         rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
3606         IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
3607 }
3608
3609 /**
3610  * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
3611  * @adapter: board private structure
3612  *
3613  * Configure the Tx unit of the MAC after a reset.
3614  **/
3615 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
3616 {
3617         struct ixgbe_hw *hw = &adapter->hw;
3618         u32 dmatxctl;
3619         u32 i;
3620
3621         ixgbe_setup_mtqc(adapter);
3622
3623         if (hw->mac.type != ixgbe_mac_82598EB) {
3624                 /* DMATXCTL.EN must be before Tx queues are enabled */
3625                 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
3626                 dmatxctl |= IXGBE_DMATXCTL_TE;
3627                 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
3628         }
3629
3630         /* Setup the HW Tx Head and Tail descriptor pointers */
3631         for (i = 0; i < adapter->num_tx_queues; i++)
3632                 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
3633         for (i = 0; i < adapter->num_xdp_queues; i++)
3634                 ixgbe_configure_tx_ring(adapter, adapter->xdp_ring[i]);
3635 }
3636
3637 static void ixgbe_enable_rx_drop(struct ixgbe_adapter *adapter,
3638                                  struct ixgbe_ring *ring)
3639 {
3640         struct ixgbe_hw *hw = &adapter->hw;
3641         u8 reg_idx = ring->reg_idx;
3642         u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));
3643
3644         srrctl |= IXGBE_SRRCTL_DROP_EN;
3645
3646         IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3647 }
3648
3649 static void ixgbe_disable_rx_drop(struct ixgbe_adapter *adapter,
3650                                   struct ixgbe_ring *ring)
3651 {
3652         struct ixgbe_hw *hw = &adapter->hw;
3653         u8 reg_idx = ring->reg_idx;
3654         u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));
3655
3656         srrctl &= ~IXGBE_SRRCTL_DROP_EN;
3657
3658         IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3659 }
3660
3661 #ifdef CONFIG_IXGBE_DCB
3662 void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
3663 #else
3664 static void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
3665 #endif
3666 {
3667         int i;
3668         bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
3669
3670         if (adapter->ixgbe_ieee_pfc)
3671                 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
3672
3673         /*
3674          * We should set the drop enable bit if:
3675          *  SR-IOV is enabled
3676          *   or
3677          *  Number of Rx queues > 1 and flow control is disabled
3678          *
3679          *  This allows us to avoid head of line blocking for security
3680          *  and performance reasons.
3681          */
3682         if (adapter->num_vfs || (adapter->num_rx_queues > 1 &&
3683             !(adapter->hw.fc.current_mode & ixgbe_fc_tx_pause) && !pfc_en)) {
3684                 for (i = 0; i < adapter->num_rx_queues; i++)
3685                         ixgbe_enable_rx_drop(adapter, adapter->rx_ring[i]);
3686         } else {
3687                 for (i = 0; i < adapter->num_rx_queues; i++)
3688                         ixgbe_disable_rx_drop(adapter, adapter->rx_ring[i]);
3689         }
3690 }
3691
3692 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
3693
3694 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
3695                                    struct ixgbe_ring *rx_ring)
3696 {
3697         struct ixgbe_hw *hw = &adapter->hw;
3698         u32 srrctl;
3699         u8 reg_idx = rx_ring->reg_idx;
3700
3701         if (hw->mac.type == ixgbe_mac_82598EB) {
3702                 u16 mask = adapter->ring_feature[RING_F_RSS].mask;
3703
3704                 /*
3705                  * if VMDq is not active we must program one srrctl register
3706                  * per RSS queue since we have enabled RDRXCTL.MVMEN
3707                  */
3708                 reg_idx &= mask;
3709         }
3710
3711         /* configure header buffer length, needed for RSC */
3712         srrctl = IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT;
3713
3714         /* configure the packet buffer length */
3715         if (rx_ring->xsk_pool) {
3716                 u32 xsk_buf_len = xsk_pool_get_rx_frame_size(rx_ring->xsk_pool);
3717
3718                 /* If the MAC support setting RXDCTL.RLPML, the
3719                  * SRRCTL[n].BSIZEPKT is set to PAGE_SIZE and
3720                  * RXDCTL.RLPML is set to the actual UMEM buffer
3721                  * size. If not, then we are stuck with a 1k buffer
3722                  * size resolution. In this case frames larger than
3723                  * the UMEM buffer size viewed in a 1k resolution will
3724                  * be dropped.
3725                  */
3726                 if (hw->mac.type != ixgbe_mac_82599EB)
3727                         srrctl |= PAGE_SIZE >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
3728                 else
3729                         srrctl |= xsk_buf_len >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
3730         } else if (test_bit(__IXGBE_RX_3K_BUFFER, &rx_ring->state)) {
3731                 srrctl |= IXGBE_RXBUFFER_3K >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
3732         } else {
3733                 srrctl |= IXGBE_RXBUFFER_2K >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
3734         }
3735
3736         /* configure descriptor type */
3737         srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
3738
3739         IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3740 }
3741
3742 /**
3743  * ixgbe_rss_indir_tbl_entries - Return RSS indirection table entries
3744  * @adapter: device handle
3745  *
3746  *  - 82598/82599/X540:     128
3747  *  - X550(non-SRIOV mode): 512
3748  *  - X550(SRIOV mode):     64
3749  */
3750 u32 ixgbe_rss_indir_tbl_entries(struct ixgbe_adapter *adapter)
3751 {
3752         if (adapter->hw.mac.type < ixgbe_mac_X550)
3753                 return 128;
3754         else if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3755                 return 64;
3756         else
3757                 return 512;
3758 }
3759
3760 /**
3761  * ixgbe_store_key - Write the RSS key to HW
3762  * @adapter: device handle
3763  *
3764  * Write the RSS key stored in adapter.rss_key to HW.
3765  */
3766 void ixgbe_store_key(struct ixgbe_adapter *adapter)
3767 {
3768         struct ixgbe_hw *hw = &adapter->hw;
3769         int i;
3770
3771         for (i = 0; i < 10; i++)
3772                 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), adapter->rss_key[i]);
3773 }
3774
3775 /**
3776  * ixgbe_init_rss_key - Initialize adapter RSS key
3777  * @adapter: device handle
3778  *
3779  * Allocates and initializes the RSS key if it is not allocated.
3780  **/
3781 static inline int ixgbe_init_rss_key(struct ixgbe_adapter *adapter)
3782 {
3783         u32 *rss_key;
3784
3785         if (!adapter->rss_key) {
3786                 rss_key = kzalloc(IXGBE_RSS_KEY_SIZE, GFP_KERNEL);
3787                 if (unlikely(!rss_key))
3788                         return -ENOMEM;
3789
3790                 netdev_rss_key_fill(rss_key, IXGBE_RSS_KEY_SIZE);
3791                 adapter->rss_key = rss_key;
3792         }
3793
3794         return 0;
3795 }
3796
3797 /**
3798  * ixgbe_store_reta - Write the RETA table to HW
3799  * @adapter: device handle
3800  *
3801  * Write the RSS redirection table stored in adapter.rss_indir_tbl[] to HW.
3802  */
3803 void ixgbe_store_reta(struct ixgbe_adapter *adapter)
3804 {
3805         u32 i, reta_entries = ixgbe_rss_indir_tbl_entries(adapter);
3806         struct ixgbe_hw *hw = &adapter->hw;
3807         u32 reta = 0;
3808         u32 indices_multi;
3809         u8 *indir_tbl = adapter->rss_indir_tbl;
3810
3811         /* Fill out the redirection table as follows:
3812          *  - 82598:      8 bit wide entries containing pair of 4 bit RSS
3813          *    indices.
3814          *  - 82599/X540: 8 bit wide entries containing 4 bit RSS index
3815          *  - X550:       8 bit wide entries containing 6 bit RSS index
3816          */
3817         if (adapter->hw.mac.type == ixgbe_mac_82598EB)
3818                 indices_multi = 0x11;
3819         else
3820                 indices_multi = 0x1;
3821
3822         /* Write redirection table to HW */
3823         for (i = 0; i < reta_entries; i++) {
3824                 reta |= indices_multi * indir_tbl[i] << (i & 0x3) * 8;
3825                 if ((i & 3) == 3) {
3826                         if (i < 128)
3827                                 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
3828                         else
3829                                 IXGBE_WRITE_REG(hw, IXGBE_ERETA((i >> 2) - 32),
3830                                                 reta);
3831                         reta = 0;
3832                 }
3833         }
3834 }
3835
3836 /**
3837  * ixgbe_store_vfreta - Write the RETA table to HW (x550 devices in SRIOV mode)
3838  * @adapter: device handle
3839  *
3840  * Write the RSS redirection table stored in adapter.rss_indir_tbl[] to HW.
3841  */
3842 static void ixgbe_store_vfreta(struct ixgbe_adapter *adapter)
3843 {
3844         u32 i, reta_entries = ixgbe_rss_indir_tbl_entries(adapter);
3845         struct ixgbe_hw *hw = &adapter->hw;
3846         u32 vfreta = 0;
3847
3848         /* Write redirection table to HW */
3849         for (i = 0; i < reta_entries; i++) {
3850                 u16 pool = adapter->num_rx_pools;
3851
3852                 vfreta |= (u32)adapter->rss_indir_tbl[i] << (i & 0x3) * 8;
3853                 if ((i & 3) != 3)
3854                         continue;
3855
3856                 while (pool--)
3857                         IXGBE_WRITE_REG(hw,
3858                                         IXGBE_PFVFRETA(i >> 2, VMDQ_P(pool)),
3859                                         vfreta);
3860                 vfreta = 0;
3861         }
3862 }
3863
3864 static void ixgbe_setup_reta(struct ixgbe_adapter *adapter)
3865 {
3866         u32 i, j;
3867         u32 reta_entries = ixgbe_rss_indir_tbl_entries(adapter);
3868         u16 rss_i = adapter->ring_feature[RING_F_RSS].indices;
3869
3870         /* Program table for at least 4 queues w/ SR-IOV so that VFs can
3871          * make full use of any rings they may have.  We will use the
3872          * PSRTYPE register to control how many rings we use within the PF.
3873          */
3874         if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) && (rss_i < 4))
3875                 rss_i = 4;
3876
3877         /* Fill out hash function seeds */
3878         ixgbe_store_key(adapter);
3879
3880         /* Fill out redirection table */
3881         memset(adapter->rss_indir_tbl, 0, sizeof(adapter->rss_indir_tbl));
3882
3883         for (i = 0, j = 0; i < reta_entries; i++, j++) {
3884                 if (j == rss_i)
3885                         j = 0;
3886
3887                 adapter->rss_indir_tbl[i] = j;
3888         }
3889
3890         ixgbe_store_reta(adapter);
3891 }
3892
3893 static void ixgbe_setup_vfreta(struct ixgbe_adapter *adapter)
3894 {
3895         struct ixgbe_hw *hw = &adapter->hw;
3896         u16 rss_i = adapter->ring_feature[RING_F_RSS].indices;
3897         int i, j;
3898
3899         /* Fill out hash function seeds */
3900         for (i = 0; i < 10; i++) {
3901                 u16 pool = adapter->num_rx_pools;
3902
3903                 while (pool--)
3904                         IXGBE_WRITE_REG(hw,
3905                                         IXGBE_PFVFRSSRK(i, VMDQ_P(pool)),
3906                                         *(adapter->rss_key + i));
3907         }
3908
3909         /* Fill out the redirection table */
3910         for (i = 0, j = 0; i < 64; i++, j++) {
3911                 if (j == rss_i)
3912                         j = 0;
3913
3914                 adapter->rss_indir_tbl[i] = j;
3915         }
3916
3917         ixgbe_store_vfreta(adapter);
3918 }
3919
3920 static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
3921 {
3922         struct ixgbe_hw *hw = &adapter->hw;
3923         u32 mrqc = 0, rss_field = 0, vfmrqc = 0;
3924         u32 rxcsum;
3925
3926         /* Disable indicating checksum in descriptor, enables RSS hash */
3927         rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
3928         rxcsum |= IXGBE_RXCSUM_PCSD;
3929         IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
3930
3931         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
3932                 if (adapter->ring_feature[RING_F_RSS].mask)
3933                         mrqc = IXGBE_MRQC_RSSEN;
3934         } else {
3935                 u8 tcs = adapter->hw_tcs;
3936
3937                 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3938                         if (tcs > 4)
3939                                 mrqc = IXGBE_MRQC_VMDQRT8TCEN;  /* 8 TCs */
3940                         else if (tcs > 1)
3941                                 mrqc = IXGBE_MRQC_VMDQRT4TCEN;  /* 4 TCs */
3942                         else if (adapter->ring_feature[RING_F_VMDQ].mask ==
3943                                  IXGBE_82599_VMDQ_4Q_MASK)
3944                                 mrqc = IXGBE_MRQC_VMDQRSS32EN;
3945                         else
3946                                 mrqc = IXGBE_MRQC_VMDQRSS64EN;
3947
3948                         /* Enable L3/L4 for Tx Switched packets only for X550,
3949                          * older devices do not support this feature
3950                          */
3951                         if (hw->mac.type >= ixgbe_mac_X550)
3952                                 mrqc |= IXGBE_MRQC_L3L4TXSWEN;
3953                 } else {
3954                         if (tcs > 4)
3955                                 mrqc = IXGBE_MRQC_RTRSS8TCEN;
3956                         else if (tcs > 1)
3957                                 mrqc = IXGBE_MRQC_RTRSS4TCEN;
3958                         else
3959                                 mrqc = IXGBE_MRQC_RSSEN;
3960                 }
3961         }
3962
3963         /* Perform hash on these packet types */
3964         rss_field |= IXGBE_MRQC_RSS_FIELD_IPV4 |
3965                      IXGBE_MRQC_RSS_FIELD_IPV4_TCP |
3966                      IXGBE_MRQC_RSS_FIELD_IPV6 |
3967                      IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
3968
3969         if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV4_UDP)
3970                 rss_field |= IXGBE_MRQC_RSS_FIELD_IPV4_UDP;
3971         if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV6_UDP)
3972                 rss_field |= IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
3973
3974         if ((hw->mac.type >= ixgbe_mac_X550) &&
3975             (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) {
3976                 u16 pool = adapter->num_rx_pools;
3977
3978                 /* Enable VF RSS mode */
3979                 mrqc |= IXGBE_MRQC_MULTIPLE_RSS;
3980                 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
3981
3982                 /* Setup RSS through the VF registers */
3983                 ixgbe_setup_vfreta(adapter);
3984                 vfmrqc = IXGBE_MRQC_RSSEN;
3985                 vfmrqc |= rss_field;
3986
3987                 while (pool--)
3988                         IXGBE_WRITE_REG(hw,
3989                                         IXGBE_PFVFMRQC(VMDQ_P(pool)),
3990                                         vfmrqc);
3991         } else {
3992                 ixgbe_setup_reta(adapter);
3993                 mrqc |= rss_field;
3994                 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
3995         }
3996 }
3997
3998 /**
3999  * ixgbe_configure_rscctl - enable RSC for the indicated ring
4000  * @adapter: address of board private structure
4001  * @ring: structure containing ring specific data
4002  **/
4003 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
4004                                    struct ixgbe_ring *ring)
4005 {
4006         struct ixgbe_hw *hw = &adapter->hw;
4007         u32 rscctrl;
4008         u8 reg_idx = ring->reg_idx;
4009
4010         if (!ring_is_rsc_enabled(ring))
4011                 return;
4012
4013         rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
4014         rscctrl |= IXGBE_RSCCTL_RSCEN;
4015         /*
4016          * we must limit the number of descriptors so that the
4017          * total size of max desc * buf_len is not greater
4018          * than 65536
4019          */
4020         rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
4021         IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
4022 }
4023
4024 #define IXGBE_MAX_RX_DESC_POLL 10
4025 static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
4026                                        struct ixgbe_ring *ring)
4027 {
4028         struct ixgbe_hw *hw = &adapter->hw;
4029         int wait_loop = IXGBE_MAX_RX_DESC_POLL;
4030         u32 rxdctl;
4031         u8 reg_idx = ring->reg_idx;
4032
4033         if (ixgbe_removed(hw->hw_addr))
4034                 return;
4035         /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
4036         if (hw->mac.type == ixgbe_mac_82598EB &&
4037             !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
4038                 return;
4039
4040         do {
4041                 usleep_range(1000, 2000);
4042                 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
4043         } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
4044
4045         if (!wait_loop) {
4046                 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
4047                       "the polling period\n", reg_idx);
4048         }
4049 }
4050
4051 void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
4052                              struct ixgbe_ring *ring)
4053 {
4054         struct ixgbe_hw *hw = &adapter->hw;
4055         union ixgbe_adv_rx_desc *rx_desc;
4056         u64 rdba = ring->dma;
4057         u32 rxdctl;
4058         u8 reg_idx = ring->reg_idx;
4059
4060         xdp_rxq_info_unreg_mem_model(&ring->xdp_rxq);
4061         ring->xsk_pool = ixgbe_xsk_pool(adapter, ring);
4062         if (ring->xsk_pool) {
4063                 WARN_ON(xdp_rxq_info_reg_mem_model(&ring->xdp_rxq,
4064                                                    MEM_TYPE_XSK_BUFF_POOL,
4065                                                    NULL));
4066                 xsk_pool_set_rxq_info(ring->xsk_pool, &ring->xdp_rxq);
4067         } else {
4068                 WARN_ON(xdp_rxq_info_reg_mem_model(&ring->xdp_rxq,
4069                                                    MEM_TYPE_PAGE_SHARED, NULL));
4070         }
4071
4072         /* disable queue to avoid use of these values while updating state */
4073         rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
4074         rxdctl &= ~IXGBE_RXDCTL_ENABLE;
4075
4076         /* write value back with RXDCTL.ENABLE bit cleared */
4077         IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
4078         IXGBE_WRITE_FLUSH(hw);
4079
4080         IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
4081         IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
4082         IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
4083                         ring->count * sizeof(union ixgbe_adv_rx_desc));
4084         /* Force flushing of IXGBE_RDLEN to prevent MDD */
4085         IXGBE_WRITE_FLUSH(hw);
4086
4087         IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
4088         IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
4089         ring->tail = adapter->io_addr + IXGBE_RDT(reg_idx);
4090
4091         ixgbe_configure_srrctl(adapter, ring);
4092         ixgbe_configure_rscctl(adapter, ring);
4093
4094         if (hw->mac.type == ixgbe_mac_82598EB) {
4095                 /*
4096                  * enable cache line friendly hardware writes:
4097                  * PTHRESH=32 descriptors (half the internal cache),
4098                  * this also removes ugly rx_no_buffer_count increment
4099                  * HTHRESH=4 descriptors (to minimize latency on fetch)
4100                  * WTHRESH=8 burst writeback up to two cache lines
4101                  */
4102                 rxdctl &= ~0x3FFFFF;
4103                 rxdctl |=  0x080420;
4104 #if (PAGE_SIZE < 8192)
4105         /* RXDCTL.RLPML does not work on 82599 */
4106         } else if (hw->mac.type != ixgbe_mac_82599EB) {
4107                 rxdctl &= ~(IXGBE_RXDCTL_RLPMLMASK |
4108                             IXGBE_RXDCTL_RLPML_EN);
4109
4110                 /* Limit the maximum frame size so we don't overrun the skb.
4111                  * This can happen in SRIOV mode when the MTU of the VF is
4112                  * higher than the MTU of the PF.
4113                  */
4114                 if (ring_uses_build_skb(ring) &&
4115                     !test_bit(__IXGBE_RX_3K_BUFFER, &ring->state))
4116                         rxdctl |= IXGBE_MAX_2K_FRAME_BUILD_SKB |
4117                                   IXGBE_RXDCTL_RLPML_EN;
4118 #endif
4119         }
4120
4121         ring->rx_offset = ixgbe_rx_offset(ring);
4122
4123         if (ring->xsk_pool && hw->mac.type != ixgbe_mac_82599EB) {
4124                 u32 xsk_buf_len = xsk_pool_get_rx_frame_size(ring->xsk_pool);
4125
4126                 rxdctl &= ~(IXGBE_RXDCTL_RLPMLMASK |
4127                             IXGBE_RXDCTL_RLPML_EN);
4128                 rxdctl |= xsk_buf_len | IXGBE_RXDCTL_RLPML_EN;
4129
4130                 ring->rx_buf_len = xsk_buf_len;
4131         }
4132
4133         /* initialize rx_buffer_info */
4134         memset(ring->rx_buffer_info, 0,
4135                sizeof(struct ixgbe_rx_buffer) * ring->count);
4136
4137         /* initialize Rx descriptor 0 */
4138         rx_desc = IXGBE_RX_DESC(ring, 0);
4139         rx_desc->wb.upper.length = 0;
4140
4141         /* enable receive descriptor ring */
4142         rxdctl |= IXGBE_RXDCTL_ENABLE;
4143         IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
4144
4145         ixgbe_rx_desc_queue_enable(adapter, ring);
4146         if (ring->xsk_pool)
4147                 ixgbe_alloc_rx_buffers_zc(ring, ixgbe_desc_unused(ring));
4148         else
4149                 ixgbe_alloc_rx_buffers(ring, ixgbe_desc_unused(ring));
4150 }
4151
4152 static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
4153 {
4154         struct ixgbe_hw *hw = &adapter->hw;
4155         int rss_i = adapter->ring_feature[RING_F_RSS].indices;
4156         u16 pool = adapter->num_rx_pools;
4157
4158         /* PSRTYPE must be initialized in non 82598 adapters */
4159         u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
4160                       IXGBE_PSRTYPE_UDPHDR |
4161                       IXGBE_PSRTYPE_IPV4HDR |
4162                       IXGBE_PSRTYPE_L2HDR |
4163                       IXGBE_PSRTYPE_IPV6HDR;
4164
4165         if (hw->mac.type == ixgbe_mac_82598EB)
4166                 return;
4167
4168         if (rss_i > 3)
4169                 psrtype |= 2u << 29;
4170         else if (rss_i > 1)
4171                 psrtype |= 1u << 29;
4172
4173         while (pool--)
4174                 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(VMDQ_P(pool)), psrtype);
4175 }
4176
4177 static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
4178 {
4179         struct ixgbe_hw *hw = &adapter->hw;
4180         u16 pool = adapter->num_rx_pools;
4181         u32 reg_offset, vf_shift, vmolr;
4182         u32 gcr_ext, vmdctl;
4183         int i;
4184
4185         if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
4186                 return;
4187
4188         vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
4189         vmdctl |= IXGBE_VMD_CTL_VMDQ_EN;
4190         vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
4191         vmdctl |= VMDQ_P(0) << IXGBE_VT_CTL_POOL_SHIFT;
4192         vmdctl |= IXGBE_VT_CTL_REPLEN;
4193         IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
4194
4195         /* accept untagged packets until a vlan tag is
4196          * specifically set for the VMDQ queue/pool
4197          */
4198         vmolr = IXGBE_VMOLR_AUPE;
4199         while (pool--)
4200                 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(VMDQ_P(pool)), vmolr);
4201
4202         vf_shift = VMDQ_P(0) % 32;
4203         reg_offset = (VMDQ_P(0) >= 32) ? 1 : 0;
4204
4205         /* Enable only the PF's pool for Tx/Rx */
4206         IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), GENMASK(31, vf_shift));
4207         IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), reg_offset - 1);
4208         IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), GENMASK(31, vf_shift));
4209         IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), reg_offset - 1);
4210         if (adapter->bridge_mode == BRIDGE_MODE_VEB)
4211                 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
4212
4213         /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
4214         hw->mac.ops.set_vmdq(hw, 0, VMDQ_P(0));
4215
4216         /* clear VLAN promisc flag so VFTA will be updated if necessary */
4217         adapter->flags2 &= ~IXGBE_FLAG2_VLAN_PROMISC;
4218
4219         /*
4220          * Set up VF register offsets for selected VT Mode,
4221          * i.e. 32 or 64 VFs for SR-IOV
4222          */
4223         switch (adapter->ring_feature[RING_F_VMDQ].mask) {
4224         case IXGBE_82599_VMDQ_8Q_MASK:
4225                 gcr_ext = IXGBE_GCR_EXT_VT_MODE_16;
4226                 break;
4227         case IXGBE_82599_VMDQ_4Q_MASK:
4228                 gcr_ext = IXGBE_GCR_EXT_VT_MODE_32;
4229                 break;
4230         default:
4231                 gcr_ext = IXGBE_GCR_EXT_VT_MODE_64;
4232                 break;
4233         }
4234
4235         IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
4236
4237         for (i = 0; i < adapter->num_vfs; i++) {
4238                 /* configure spoof checking */
4239                 ixgbe_ndo_set_vf_spoofchk(adapter->netdev, i,
4240                                           adapter->vfinfo[i].spoofchk_enabled);
4241
4242                 /* Enable/Disable RSS query feature  */
4243                 ixgbe_ndo_set_vf_rss_query_en(adapter->netdev, i,
4244                                           adapter->vfinfo[i].rss_query_enabled);
4245         }
4246 }
4247
4248 static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
4249 {
4250         struct ixgbe_hw *hw = &adapter->hw;
4251         struct net_device *netdev = adapter->netdev;
4252         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
4253         struct ixgbe_ring *rx_ring;
4254         int i;
4255         u32 mhadd, hlreg0;
4256
4257 #ifdef IXGBE_FCOE
4258         /* adjust max frame to be able to do baby jumbo for FCoE */
4259         if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
4260             (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
4261                 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
4262
4263 #endif /* IXGBE_FCOE */
4264
4265         /* adjust max frame to be at least the size of a standard frame */
4266         if (max_frame < (ETH_FRAME_LEN + ETH_FCS_LEN))
4267                 max_frame = (ETH_FRAME_LEN + ETH_FCS_LEN);
4268
4269         mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
4270         if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
4271                 mhadd &= ~IXGBE_MHADD_MFS_MASK;
4272                 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
4273
4274                 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
4275         }
4276
4277         hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
4278         /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
4279         hlreg0 |= IXGBE_HLREG0_JUMBOEN;
4280         IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
4281
4282         /*
4283          * Setup the HW Rx Head and Tail Descriptor Pointers and
4284          * the Base and Length of the Rx Descriptor Ring
4285          */
4286         for (i = 0; i < adapter->num_rx_queues; i++) {
4287                 rx_ring = adapter->rx_ring[i];
4288
4289                 clear_ring_rsc_enabled(rx_ring);
4290                 clear_bit(__IXGBE_RX_3K_BUFFER, &rx_ring->state);
4291                 clear_bit(__IXGBE_RX_BUILD_SKB_ENABLED, &rx_ring->state);
4292
4293                 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
4294                         set_ring_rsc_enabled(rx_ring);
4295
4296                 if (test_bit(__IXGBE_RX_FCOE, &rx_ring->state))
4297                         set_bit(__IXGBE_RX_3K_BUFFER, &rx_ring->state);
4298
4299                 if (adapter->flags2 & IXGBE_FLAG2_RX_LEGACY)
4300                         continue;
4301
4302                 set_bit(__IXGBE_RX_BUILD_SKB_ENABLED, &rx_ring->state);
4303
4304 #if (PAGE_SIZE < 8192)
4305                 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
4306                         set_bit(__IXGBE_RX_3K_BUFFER, &rx_ring->state);
4307
4308                 if (IXGBE_2K_TOO_SMALL_WITH_PADDING ||
4309                     (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)))
4310                         set_bit(__IXGBE_RX_3K_BUFFER, &rx_ring->state);
4311 #endif
4312         }
4313 }
4314
4315 static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
4316 {
4317         struct ixgbe_hw *hw = &adapter->hw;
4318         u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
4319
4320         switch (hw->mac.type) {
4321         case ixgbe_mac_82598EB:
4322                 /*
4323                  * For VMDq support of different descriptor types or
4324                  * buffer sizes through the use of multiple SRRCTL
4325                  * registers, RDRXCTL.MVMEN must be set to 1
4326                  *
4327                  * also, the manual doesn't mention it clearly but DCA hints
4328                  * will only use queue 0's tags unless this bit is set.  Side
4329                  * effects of setting this bit are only that SRRCTL must be
4330                  * fully programmed [0..15]
4331                  */
4332                 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
4333                 break;
4334         case ixgbe_mac_X550:
4335         case ixgbe_mac_X550EM_x:
4336         case ixgbe_mac_x550em_a:
4337                 if (adapter->num_vfs)
4338                         rdrxctl |= IXGBE_RDRXCTL_PSP;
4339                 fallthrough;
4340         case ixgbe_mac_82599EB:
4341         case ixgbe_mac_X540:
4342                 /* Disable RSC for ACK packets */
4343                 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
4344                    (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
4345                 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
4346                 /* hardware requires some bits to be set by default */
4347                 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
4348                 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
4349                 break;
4350         default:
4351                 /* We should do nothing since we don't know this hardware */
4352                 return;
4353         }
4354
4355         IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
4356 }
4357
4358 /**
4359  * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
4360  * @adapter: board private structure
4361  *
4362  * Configure the Rx unit of the MAC after a reset.
4363  **/
4364 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
4365 {
4366         struct ixgbe_hw *hw = &adapter->hw;
4367         int i;
4368         u32 rxctrl, rfctl;
4369
4370         /* disable receives while setting up the descriptors */
4371         hw->mac.ops.disable_rx(hw);
4372
4373         ixgbe_setup_psrtype(adapter);
4374         ixgbe_setup_rdrxctl(adapter);
4375
4376         /* RSC Setup */
4377         rfctl = IXGBE_READ_REG(hw, IXGBE_RFCTL);
4378         rfctl &= ~IXGBE_RFCTL_RSC_DIS;
4379         if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
4380                 rfctl |= IXGBE_RFCTL_RSC_DIS;
4381
4382         /* disable NFS filtering */
4383         rfctl |= (IXGBE_RFCTL_NFSW_DIS | IXGBE_RFCTL_NFSR_DIS);
4384         IXGBE_WRITE_REG(hw, IXGBE_RFCTL, rfctl);
4385
4386         /* Program registers for the distribution of queues */
4387         ixgbe_setup_mrqc(adapter);
4388
4389         /* set_rx_buffer_len must be called before ring initialization */
4390         ixgbe_set_rx_buffer_len(adapter);
4391
4392         /*
4393          * Setup the HW Rx Head and Tail Descriptor Pointers and
4394          * the Base and Length of the Rx Descriptor Ring
4395          */
4396         for (i = 0; i < adapter->num_rx_queues; i++)
4397                 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
4398
4399         rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
4400         /* disable drop enable for 82598 parts */
4401         if (hw->mac.type == ixgbe_mac_82598EB)
4402                 rxctrl |= IXGBE_RXCTRL_DMBYPS;
4403
4404         /* enable all receives */
4405         rxctrl |= IXGBE_RXCTRL_RXEN;
4406         hw->mac.ops.enable_rx_dma(hw, rxctrl);
4407 }
4408
4409 static int ixgbe_vlan_rx_add_vid(struct net_device *netdev,
4410                                  __be16 proto, u16 vid)
4411 {
4412         struct ixgbe_adapter *adapter = netdev_priv(netdev);
4413         struct ixgbe_hw *hw = &adapter->hw;
4414
4415         /* add VID to filter table */
4416         if (!vid || !(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
4417                 hw->mac.ops.set_vfta(&adapter->hw, vid, VMDQ_P(0), true, !!vid);
4418
4419         set_bit(vid, adapter->active_vlans);
4420
4421         return 0;
4422 }
4423
4424 static int ixgbe_find_vlvf_entry(struct ixgbe_hw *hw, u32 vlan)
4425 {
4426         u32 vlvf;
4427         int idx;
4428
4429         /* short cut the special case */
4430         if (vlan == 0)
4431                 return 0;
4432
4433         /* Search for the vlan id in the VLVF entries */
4434         for (idx = IXGBE_VLVF_ENTRIES; --idx;) {
4435                 vlvf = IXGBE_READ_REG(hw, IXGBE_VLVF(idx));
4436                 if ((vlvf & VLAN_VID_MASK) == vlan)
4437                         break;
4438         }
4439
4440         return idx;
4441 }
4442
4443 void ixgbe_update_pf_promisc_vlvf(struct ixgbe_adapter *adapter, u32 vid)
4444 {
4445         struct ixgbe_hw *hw = &adapter->hw;
4446         u32 bits, word;
4447         int idx;
4448
4449         idx = ixgbe_find_vlvf_entry(hw, vid);
4450         if (!idx)
4451                 return;
4452
4453         /* See if any other pools are set for this VLAN filter
4454          * entry other than the PF.
4455          */
4456         word = idx * 2 + (VMDQ_P(0) / 32);
4457         bits = ~BIT(VMDQ_P(0) % 32);
4458         bits &= IXGBE_READ_REG(hw, IXGBE_VLVFB(word));
4459
4460         /* Disable the filter so this falls into the default pool. */
4461         if (!bits && !IXGBE_READ_REG(hw, IXGBE_VLVFB(word ^ 1))) {
4462                 if (!(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
4463                         IXGBE_WRITE_REG(hw, IXGBE_VLVFB(word), 0);
4464                 IXGBE_WRITE_REG(hw, IXGBE_VLVF(idx), 0);
4465         }
4466 }
4467
4468 static int ixgbe_vlan_rx_kill_vid(struct net_device *netdev,
4469                                   __be16 proto, u16 vid)
4470 {
4471         struct ixgbe_adapter *adapter = netdev_priv(netdev);
4472         struct ixgbe_hw *hw = &adapter->hw;
4473
4474         /* remove VID from filter table */
4475         if (vid && !(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
4476                 hw->mac.ops.set_vfta(hw, vid, VMDQ_P(0), false, true);
4477
4478         clear_bit(vid, adapter->active_vlans);
4479
4480         return 0;
4481 }
4482
4483 /**
4484  * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping
4485  * @adapter: driver data
4486  */
4487 static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter)
4488 {
4489         struct ixgbe_hw *hw = &adapter->hw;
4490         u32 vlnctrl;
4491         int i, j;
4492
4493         switch (hw->mac.type) {
4494         case ixgbe_mac_82598EB:
4495                 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
4496                 vlnctrl &= ~IXGBE_VLNCTRL_VME;
4497                 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
4498                 break;
4499         case ixgbe_mac_82599EB:
4500         case ixgbe_mac_X540:
4501         case ixgbe_mac_X550:
4502         case ixgbe_mac_X550EM_x:
4503         case ixgbe_mac_x550em_a:
4504                 for (i = 0; i < adapter->num_rx_queues; i++) {
4505                         struct ixgbe_ring *ring = adapter->rx_ring[i];
4506
4507                         if (!netif_is_ixgbe(ring->netdev))
4508                                 continue;
4509
4510                         j = ring->reg_idx;
4511                         vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
4512                         vlnctrl &= ~IXGBE_RXDCTL_VME;
4513                         IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
4514                 }
4515                 break;
4516         default:
4517                 break;
4518         }
4519 }
4520
4521 /**
4522  * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping
4523  * @adapter: driver data
4524  */
4525 static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter)
4526 {
4527         struct ixgbe_hw *hw = &adapter->hw;
4528         u32 vlnctrl;
4529         int i, j;
4530
4531         switch (hw->mac.type) {
4532         case ixgbe_mac_82598EB:
4533                 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
4534                 vlnctrl |= IXGBE_VLNCTRL_VME;
4535                 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
4536                 break;
4537         case ixgbe_mac_82599EB:
4538         case ixgbe_mac_X540:
4539         case ixgbe_mac_X550:
4540         case ixgbe_mac_X550EM_x:
4541         case ixgbe_mac_x550em_a:
4542                 for (i = 0; i < adapter->num_rx_queues; i++) {
4543                         struct ixgbe_ring *ring = adapter->rx_ring[i];
4544
4545                         if (!netif_is_ixgbe(ring->netdev))
4546                                 continue;
4547
4548                         j = ring->reg_idx;
4549                         vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
4550                         vlnctrl |= IXGBE_RXDCTL_VME;
4551                         IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
4552                 }
4553                 break;
4554         default:
4555                 break;
4556         }
4557 }
4558
4559 static void ixgbe_vlan_promisc_enable(struct ixgbe_adapter *adapter)
4560 {
4561         struct ixgbe_hw *hw = &adapter->hw;
4562         u32 vlnctrl, i;
4563
4564         vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
4565
4566         if (adapter->flags & IXGBE_FLAG_VMDQ_ENABLED) {
4567         /* For VMDq and SR-IOV we must leave VLAN filtering enabled */
4568                 vlnctrl |= IXGBE_VLNCTRL_VFE;
4569                 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
4570         } else {
4571                 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
4572                 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
4573                 return;
4574         }
4575
4576         /* Nothing to do for 82598 */
4577         if (hw->mac.type == ixgbe_mac_82598EB)
4578                 return;
4579
4580         /* We are already in VLAN promisc, nothing to do */
4581         if (adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC)
4582                 return;
4583
4584         /* Set flag so we don't redo unnecessary work */
4585         adapter->flags2 |= IXGBE_FLAG2_VLAN_PROMISC;
4586
4587         /* Add PF to all active pools */
4588         for (i = IXGBE_VLVF_ENTRIES; --i;) {
4589                 u32 reg_offset = IXGBE_VLVFB(i * 2 + VMDQ_P(0) / 32);
4590                 u32 vlvfb = IXGBE_READ_REG(hw, reg_offset);
4591
4592                 vlvfb |= BIT(VMDQ_P(0) % 32);
4593                 IXGBE_WRITE_REG(hw, reg_offset, vlvfb);
4594         }
4595
4596         /* Set all bits in the VLAN filter table array */
4597         for (i = hw->mac.vft_size; i--;)
4598                 IXGBE_WRITE_REG(hw, IXGBE_VFTA(i), ~0U);
4599 }
4600
4601 #define VFTA_BLOCK_SIZE 8
4602 static void ixgbe_scrub_vfta(struct ixgbe_adapter *adapter, u32 vfta_offset)
4603 {
4604         struct ixgbe_hw *hw = &adapter->hw;
4605         u32 vfta[VFTA_BLOCK_SIZE] = { 0 };
4606         u32 vid_start = vfta_offset * 32;
4607         u32 vid_end = vid_start + (VFTA_BLOCK_SIZE * 32);
4608         u32 i, vid, word, bits;
4609
4610         for (i = IXGBE_VLVF_ENTRIES; --i;) {
4611                 u32 vlvf = IXGBE_READ_REG(hw, IXGBE_VLVF(i));
4612
4613                 /* pull VLAN ID from VLVF */
4614                 vid = vlvf & VLAN_VID_MASK;
4615
4616                 /* only concern outselves with a certain range */
4617                 if (vid < vid_start || vid >= vid_end)
4618                         continue;
4619
4620                 if (vlvf) {
4621                         /* record VLAN ID in VFTA */
4622                         vfta[(vid - vid_start) / 32] |= BIT(vid % 32);
4623
4624                         /* if PF is part of this then continue */
4625                         if (test_bit(vid, adapter->active_vlans))
4626                                 continue;
4627                 }
4628
4629                 /* remove PF from the pool */
4630                 word = i * 2 + VMDQ_P(0) / 32;
4631                 bits = ~BIT(VMDQ_P(0) % 32);
4632                 bits &= IXGBE_READ_REG(hw, IXGBE_VLVFB(word));
4633                 IXGBE_WRITE_REG(hw, IXGBE_VLVFB(word), bits);
4634         }
4635
4636         /* extract values from active_vlans and write back to VFTA */
4637         for (i = VFTA_BLOCK_SIZE; i--;) {
4638                 vid = (vfta_offset + i) * 32;
4639                 word = vid / BITS_PER_LONG;
4640                 bits = vid % BITS_PER_LONG;
4641
4642                 vfta[i] |= adapter->active_vlans[word] >> bits;
4643
4644                 IXGBE_WRITE_REG(hw, IXGBE_VFTA(vfta_offset + i), vfta[i]);
4645         }
4646 }
4647
4648 static void ixgbe_vlan_promisc_disable(struct ixgbe_adapter *adapter)
4649 {
4650         struct ixgbe_hw *hw = &adapter->hw;
4651         u32 vlnctrl, i;
4652
4653         /* Set VLAN filtering to enabled */
4654         vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
4655         vlnctrl |= IXGBE_VLNCTRL_VFE;
4656         IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
4657
4658         if (!(adapter->flags & IXGBE_FLAG_VMDQ_ENABLED) ||
4659             hw->mac.type == ixgbe_mac_82598EB)
4660                 return;
4661
4662         /* We are not in VLAN promisc, nothing to do */
4663         if (!(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
4664                 return;
4665
4666         /* Set flag so we don't redo unnecessary work */
4667         adapter->flags2 &= ~IXGBE_FLAG2_VLAN_PROMISC;
4668
4669         for (i = 0; i < hw->mac.vft_size; i += VFTA_BLOCK_SIZE)
4670                 ixgbe_scrub_vfta(adapter, i);
4671 }
4672
4673 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
4674 {
4675         u16 vid = 1;
4676
4677         ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0);
4678
4679         for_each_set_bit_from(vid, adapter->active_vlans, VLAN_N_VID)
4680                 ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
4681 }
4682
4683 /**
4684  * ixgbe_write_mc_addr_list - write multicast addresses to MTA
4685  * @netdev: network interface device structure
4686  *
4687  * Writes multicast address list to the MTA hash table.
4688  * Returns: -ENOMEM on failure
4689  *                0 on no addresses written
4690  *                X on writing X addresses to MTA
4691  **/
4692 static int ixgbe_write_mc_addr_list(struct net_device *netdev)
4693 {
4694         struct ixgbe_adapter *adapter = netdev_priv(netdev);
4695         struct ixgbe_hw *hw = &adapter->hw;
4696
4697         if (!netif_running(netdev))
4698                 return 0;
4699
4700         if (hw->mac.ops.update_mc_addr_list)
4701                 hw->mac.ops.update_mc_addr_list(hw, netdev);
4702         else
4703                 return -ENOMEM;
4704
4705 #ifdef CONFIG_PCI_IOV
4706         ixgbe_restore_vf_multicasts(adapter);
4707 #endif
4708
4709         return netdev_mc_count(netdev);
4710 }
4711
4712 #ifdef CONFIG_PCI_IOV
4713 void ixgbe_full_sync_mac_table(struct ixgbe_adapter *adapter)
4714 {
4715         struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4716         struct ixgbe_hw *hw = &adapter->hw;
4717         int i;
4718
4719         for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4720                 mac_table->state &= ~IXGBE_MAC_STATE_MODIFIED;
4721
4722                 if (mac_table->state & IXGBE_MAC_STATE_IN_USE)
4723                         hw->mac.ops.set_rar(hw, i,
4724                                             mac_table->addr,
4725                                             mac_table->pool,
4726                                             IXGBE_RAH_AV);
4727                 else
4728                         hw->mac.ops.clear_rar(hw, i);
4729         }
4730 }
4731
4732 #endif
4733 static void ixgbe_sync_mac_table(struct ixgbe_adapter *adapter)
4734 {
4735         struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4736         struct ixgbe_hw *hw = &adapter->hw;
4737         int i;
4738
4739         for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4740                 if (!(mac_table->state & IXGBE_MAC_STATE_MODIFIED))
4741                         continue;
4742
4743                 mac_table->state &= ~IXGBE_MAC_STATE_MODIFIED;
4744
4745                 if (mac_table->state & IXGBE_MAC_STATE_IN_USE)
4746                         hw->mac.ops.set_rar(hw, i,
4747                                             mac_table->addr,
4748                                             mac_table->pool,
4749                                             IXGBE_RAH_AV);
4750                 else
4751                         hw->mac.ops.clear_rar(hw, i);
4752         }
4753 }
4754
4755 static void ixgbe_flush_sw_mac_table(struct ixgbe_adapter *adapter)
4756 {
4757         struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4758         struct ixgbe_hw *hw = &adapter->hw;
4759         int i;
4760
4761         for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4762                 mac_table->state |= IXGBE_MAC_STATE_MODIFIED;
4763                 mac_table->state &= ~IXGBE_MAC_STATE_IN_USE;
4764         }
4765
4766         ixgbe_sync_mac_table(adapter);
4767 }
4768
4769 static int ixgbe_available_rars(struct ixgbe_adapter *adapter, u16 pool)
4770 {
4771         struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4772         struct ixgbe_hw *hw = &adapter->hw;
4773         int i, count = 0;
4774
4775         for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4776                 /* do not count default RAR as available */
4777                 if (mac_table->state & IXGBE_MAC_STATE_DEFAULT)
4778                         continue;
4779
4780                 /* only count unused and addresses that belong to us */
4781                 if (mac_table->state & IXGBE_MAC_STATE_IN_USE) {
4782                         if (mac_table->pool != pool)
4783                                 continue;
4784                 }
4785
4786                 count++;
4787         }
4788
4789         return count;
4790 }
4791
4792 /* this function destroys the first RAR entry */
4793 static void ixgbe_mac_set_default_filter(struct ixgbe_adapter *adapter)
4794 {
4795         struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4796         struct ixgbe_hw *hw = &adapter->hw;
4797
4798         memcpy(&mac_table->addr, hw->mac.addr, ETH_ALEN);
4799         mac_table->pool = VMDQ_P(0);
4800
4801         mac_table->state = IXGBE_MAC_STATE_DEFAULT | IXGBE_MAC_STATE_IN_USE;
4802
4803         hw->mac.ops.set_rar(hw, 0, mac_table->addr, mac_table->pool,
4804                             IXGBE_RAH_AV);
4805 }
4806
4807 int ixgbe_add_mac_filter(struct ixgbe_adapter *adapter,
4808                          const u8 *addr, u16 pool)
4809 {
4810         struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4811         struct ixgbe_hw *hw = &adapter->hw;
4812         int i;
4813
4814         if (is_zero_ether_addr(addr))
4815                 return -EINVAL;
4816
4817         for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4818                 if (mac_table->state & IXGBE_MAC_STATE_IN_USE)
4819                         continue;
4820
4821                 ether_addr_copy(mac_table->addr, addr);
4822                 mac_table->pool = pool;
4823
4824                 mac_table->state |= IXGBE_MAC_STATE_MODIFIED |
4825                                     IXGBE_MAC_STATE_IN_USE;
4826
4827                 ixgbe_sync_mac_table(adapter);
4828
4829                 return i;
4830         }
4831
4832         return -ENOMEM;
4833 }
4834
4835 int ixgbe_del_mac_filter(struct ixgbe_adapter *adapter,
4836                          const u8 *addr, u16 pool)
4837 {
4838         struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4839         struct ixgbe_hw *hw = &adapter->hw;
4840         int i;
4841
4842         if (is_zero_ether_addr(addr))
4843                 return -EINVAL;
4844
4845         /* search table for addr, if found clear IN_USE flag and sync */
4846         for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4847                 /* we can only delete an entry if it is in use */
4848                 if (!(mac_table->state & IXGBE_MAC_STATE_IN_USE))
4849                         continue;
4850                 /* we only care about entries that belong to the given pool */
4851                 if (mac_table->pool != pool)
4852                         continue;
4853                 /* we only care about a specific MAC address */
4854                 if (!ether_addr_equal(addr, mac_table->addr))
4855                         continue;
4856
4857                 mac_table->state |= IXGBE_MAC_STATE_MODIFIED;
4858                 mac_table->state &= ~IXGBE_MAC_STATE_IN_USE;
4859
4860                 ixgbe_sync_mac_table(adapter);
4861
4862                 return 0;
4863         }
4864
4865         return -ENOMEM;
4866 }
4867
4868 static int ixgbe_uc_sync(struct net_device *netdev, const unsigned char *addr)
4869 {
4870         struct ixgbe_adapter *adapter = netdev_priv(netdev);
4871         int ret;
4872
4873         ret = ixgbe_add_mac_filter(adapter, addr, VMDQ_P(0));
4874
4875         return min_t(int, ret, 0);
4876 }
4877
4878 static int ixgbe_uc_unsync(struct net_device *netdev, const unsigned char *addr)
4879 {
4880         struct ixgbe_adapter *adapter = netdev_priv(netdev);
4881
4882         ixgbe_del_mac_filter(adapter, addr, VMDQ_P(0));
4883
4884         return 0;
4885 }
4886
4887 /**
4888  * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
4889  * @netdev: network interface device structure
4890  *
4891  * The set_rx_method entry point is called whenever the unicast/multicast
4892  * address list or the network interface flags are updated.  This routine is
4893  * responsible for configuring the hardware for proper unicast, multicast and
4894  * promiscuous mode.
4895  **/
4896 void ixgbe_set_rx_mode(struct net_device *netdev)
4897 {
4898         struct ixgbe_adapter *adapter = netdev_priv(netdev);
4899         struct ixgbe_hw *hw = &adapter->hw;
4900         u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
4901         netdev_features_t features = netdev->features;
4902         int count;
4903
4904         /* Check for Promiscuous and All Multicast modes */
4905         fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4906
4907         /* set all bits that we expect to always be set */
4908         fctrl &= ~IXGBE_FCTRL_SBP; /* disable store-bad-packets */
4909         fctrl |= IXGBE_FCTRL_BAM;
4910         fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
4911         fctrl |= IXGBE_FCTRL_PMCF;
4912
4913         /* clear the bits we are changing the status of */
4914         fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
4915         if (netdev->flags & IFF_PROMISC) {
4916                 hw->addr_ctrl.user_set_promisc = true;
4917                 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
4918                 vmolr |= IXGBE_VMOLR_MPE;
4919                 features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
4920         } else {
4921                 if (netdev->flags & IFF_ALLMULTI) {
4922                         fctrl |= IXGBE_FCTRL_MPE;
4923                         vmolr |= IXGBE_VMOLR_MPE;
4924                 }
4925                 hw->addr_ctrl.user_set_promisc = false;
4926         }
4927
4928         /*
4929          * Write addresses to available RAR registers, if there is not
4930          * sufficient space to store all the addresses then enable
4931          * unicast promiscuous mode
4932          */
4933         if (__dev_uc_sync(netdev, ixgbe_uc_sync, ixgbe_uc_unsync)) {
4934                 fctrl |= IXGBE_FCTRL_UPE;
4935                 vmolr |= IXGBE_VMOLR_ROPE;
4936         }
4937
4938         /* Write addresses to the MTA, if the attempt fails
4939          * then we should just turn on promiscuous mode so
4940          * that we can at least receive multicast traffic
4941          */
4942         count = ixgbe_write_mc_addr_list(netdev);
4943         if (count < 0) {
4944                 fctrl |= IXGBE_FCTRL_MPE;
4945                 vmolr |= IXGBE_VMOLR_MPE;
4946         } else if (count) {
4947                 vmolr |= IXGBE_VMOLR_ROMPE;
4948         }
4949
4950         if (hw->mac.type != ixgbe_mac_82598EB) {
4951                 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(VMDQ_P(0))) &
4952                          ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
4953                            IXGBE_VMOLR_ROPE);
4954                 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(VMDQ_P(0)), vmolr);
4955         }
4956
4957         /* This is useful for sniffing bad packets. */
4958         if (features & NETIF_F_RXALL) {
4959                 /* UPE and MPE will be handled by normal PROMISC logic
4960                  * in e1000e_set_rx_mode */
4961                 fctrl |= (IXGBE_FCTRL_SBP | /* Receive bad packets */
4962                           IXGBE_FCTRL_BAM | /* RX All Bcast Pkts */
4963                           IXGBE_FCTRL_PMCF); /* RX All MAC Ctrl Pkts */
4964
4965                 fctrl &= ~(IXGBE_FCTRL_DPF);
4966                 /* NOTE:  VLAN filtering is disabled by setting PROMISC */
4967         }
4968
4969         IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
4970
4971         if (features & NETIF_F_HW_VLAN_CTAG_RX)
4972                 ixgbe_vlan_strip_enable(adapter);
4973         else
4974                 ixgbe_vlan_strip_disable(adapter);
4975
4976         if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
4977                 ixgbe_vlan_promisc_disable(adapter);
4978         else
4979                 ixgbe_vlan_promisc_enable(adapter);
4980 }
4981
4982 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
4983 {
4984         int q_idx;
4985
4986         for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++)
4987                 napi_enable(&adapter->q_vector[q_idx]->napi);
4988 }
4989
4990 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
4991 {
4992         int q_idx;
4993
4994         for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++)
4995                 napi_disable(&adapter->q_vector[q_idx]->napi);
4996 }
4997
4998 static int ixgbe_udp_tunnel_sync(struct net_device *dev, unsigned int table)
4999 {
5000         struct ixgbe_adapter *adapter = netdev_priv(dev);
5001         struct ixgbe_hw *hw = &adapter->hw;
5002         struct udp_tunnel_info ti;
5003
5004         udp_tunnel_nic_get_port(dev, table, 0, &ti);
5005         if (ti.type == UDP_TUNNEL_TYPE_VXLAN)
5006                 adapter->vxlan_port = ti.port;
5007         else
5008                 adapter->geneve_port = ti.port;
5009
5010         IXGBE_WRITE_REG(hw, IXGBE_VXLANCTRL,
5011                         ntohs(adapter->vxlan_port) |
5012                         ntohs(adapter->geneve_port) <<
5013                                 IXGBE_VXLANCTRL_GENEVE_UDPPORT_SHIFT);
5014         return 0;
5015 }
5016
5017 static const struct udp_tunnel_nic_info ixgbe_udp_tunnels_x550 = {
5018         .sync_table     = ixgbe_udp_tunnel_sync,
5019         .flags          = UDP_TUNNEL_NIC_INFO_IPV4_ONLY,
5020         .tables         = {
5021                 { .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN,  },
5022         },
5023 };
5024
5025 static const struct udp_tunnel_nic_info ixgbe_udp_tunnels_x550em_a = {
5026         .sync_table     = ixgbe_udp_tunnel_sync,
5027         .flags          = UDP_TUNNEL_NIC_INFO_IPV4_ONLY,
5028         .tables         = {
5029                 { .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN,  },
5030                 { .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_GENEVE, },
5031         },
5032 };
5033
5034 #ifdef CONFIG_IXGBE_DCB
5035 /**
5036  * ixgbe_configure_dcb - Configure DCB hardware
5037  * @adapter: ixgbe adapter struct
5038  *
5039  * This is called by the driver on open to configure the DCB hardware.
5040  * This is also called by the gennetlink interface when reconfiguring
5041  * the DCB state.
5042  */
5043 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
5044 {
5045         struct ixgbe_hw *hw = &adapter->hw;
5046         int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
5047
5048         if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
5049                 if (hw->mac.type == ixgbe_mac_82598EB)
5050                         netif_set_gso_max_size(adapter->netdev, 65536);
5051                 return;
5052         }
5053
5054         if (hw->mac.type == ixgbe_mac_82598EB)
5055                 netif_set_gso_max_size(adapter->netdev, 32768);
5056
5057 #ifdef IXGBE_FCOE
5058         if (adapter->netdev->features & NETIF_F_FCOE_MTU)
5059                 max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
5060 #endif
5061
5062         /* reconfigure the hardware */
5063         if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE) {
5064                 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
5065                                                 DCB_TX_CONFIG);
5066                 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
5067                                                 DCB_RX_CONFIG);
5068                 ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg);
5069         } else if (adapter->ixgbe_ieee_ets && adapter->ixgbe_ieee_pfc) {
5070                 ixgbe_dcb_hw_ets(&adapter->hw,
5071                                  adapter->ixgbe_ieee_ets,
5072                                  max_frame);
5073                 ixgbe_dcb_hw_pfc_config(&adapter->hw,
5074                                         adapter->ixgbe_ieee_pfc->pfc_en,
5075                                         adapter->ixgbe_ieee_ets->prio_tc);
5076         }
5077
5078         /* Enable RSS Hash per TC */
5079         if (hw->mac.type != ixgbe_mac_82598EB) {
5080                 u32 msb = 0;
5081                 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices - 1;
5082
5083                 while (rss_i) {
5084                         msb++;
5085                         rss_i >>= 1;
5086                 }
5087
5088                 /* write msb to all 8 TCs in one write */
5089                 IXGBE_WRITE_REG(hw, IXGBE_RQTC, msb * 0x11111111);
5090         }
5091 }
5092 #endif
5093
5094 /* Additional bittime to account for IXGBE framing */
5095 #define IXGBE_ETH_FRAMING 20
5096
5097 /**
5098  * ixgbe_hpbthresh - calculate high water mark for flow control
5099  *
5100  * @adapter: board private structure to calculate for
5101  * @pb: packet buffer to calculate
5102  */
5103 static int ixgbe_hpbthresh(struct ixgbe_adapter *adapter, int pb)
5104 {
5105         struct ixgbe_hw *hw = &adapter->hw;
5106         struct net_device *dev = adapter->netdev;
5107         int link, tc, kb, marker;
5108         u32 dv_id, rx_pba;
5109
5110         /* Calculate max LAN frame size */
5111         tc = link = dev->mtu + ETH_HLEN + ETH_FCS_LEN + IXGBE_ETH_FRAMING;
5112
5113 #ifdef IXGBE_FCOE
5114         /* FCoE traffic class uses FCOE jumbo frames */
5115         if ((dev->features & NETIF_F_FCOE_MTU) &&
5116             (tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
5117             (pb == ixgbe_fcoe_get_tc(adapter)))
5118                 tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
5119 #endif
5120
5121         /* Calculate delay value for device */
5122         switch (hw->mac.type) {
5123         case ixgbe_mac_X540:
5124         case ixgbe_mac_X550:
5125         case ixgbe_mac_X550EM_x:
5126         case ixgbe_mac_x550em_a:
5127                 dv_id = IXGBE_DV_X540(link, tc);
5128                 break;
5129         default:
5130                 dv_id = IXGBE_DV(link, tc);
5131                 break;
5132         }
5133
5134         /* Loopback switch introduces additional latency */
5135         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
5136                 dv_id += IXGBE_B2BT(tc);
5137
5138         /* Delay value is calculated in bit times convert to KB */
5139         kb = IXGBE_BT2KB(dv_id);
5140         rx_pba = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(pb)) >> 10;
5141
5142         marker = rx_pba - kb;
5143
5144         /* It is possible that the packet buffer is not large enough
5145          * to provide required headroom. In this case throw an error
5146          * to user and a do the best we can.
5147          */
5148         if (marker < 0) {
5149                 e_warn(drv, "Packet Buffer(%i) can not provide enough"
5150                             "headroom to support flow control."
5151                             "Decrease MTU or number of traffic classes\n", pb);
5152                 marker = tc + 1;
5153         }
5154
5155         return marker;
5156 }
5157
5158 /**
5159  * ixgbe_lpbthresh - calculate low water mark for for flow control
5160  *
5161  * @adapter: board private structure to calculate for
5162  * @pb: packet buffer to calculate
5163  */
5164 static int ixgbe_lpbthresh(struct ixgbe_adapter *adapter, int pb)
5165 {
5166         struct ixgbe_hw *hw = &adapter->hw;
5167         struct net_device *dev = adapter->netdev;
5168         int tc;
5169         u32 dv_id;
5170
5171         /* Calculate max LAN frame size */
5172         tc = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
5173
5174 #ifdef IXGBE_FCOE
5175         /* FCoE traffic class uses FCOE jumbo frames */
5176         if ((dev->features & NETIF_F_FCOE_MTU) &&
5177             (tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
5178             (pb == netdev_get_prio_tc_map(dev, adapter->fcoe.up)))
5179                 tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
5180 #endif
5181
5182         /* Calculate delay value for device */
5183         switch (hw->mac.type) {
5184         case ixgbe_mac_X540:
5185         case ixgbe_mac_X550:
5186         case ixgbe_mac_X550EM_x:
5187         case ixgbe_mac_x550em_a:
5188                 dv_id = IXGBE_LOW_DV_X540(tc);
5189                 break;
5190         default:
5191                 dv_id = IXGBE_LOW_DV(tc);
5192                 break;
5193         }
5194
5195         /* Delay value is calculated in bit times convert to KB */
5196         return IXGBE_BT2KB(dv_id);
5197 }
5198
5199 /*
5200  * ixgbe_pbthresh_setup - calculate and setup high low water marks
5201  */
5202 static void ixgbe_pbthresh_setup(struct ixgbe_adapter *adapter)
5203 {
5204         struct ixgbe_hw *hw = &adapter->hw;
5205         int num_tc = adapter->hw_tcs;
5206         int i;
5207
5208         if (!num_tc)
5209                 num_tc = 1;
5210
5211         for (i = 0; i < num_tc; i++) {
5212                 hw->fc.high_water[i] = ixgbe_hpbthresh(adapter, i);
5213                 hw->fc.low_water[i] = ixgbe_lpbthresh(adapter, i);
5214
5215                 /* Low water marks must not be larger than high water marks */
5216                 if (hw->fc.low_water[i] > hw->fc.high_water[i])
5217                         hw->fc.low_water[i] = 0;
5218         }
5219
5220         for (; i < MAX_TRAFFIC_CLASS; i++)
5221                 hw->fc.high_water[i] = 0;
5222 }
5223
5224 static void ixgbe_configure_pb(struct ixgbe_adapter *adapter)
5225 {
5226         struct ixgbe_hw *hw = &adapter->hw;
5227         int hdrm;
5228         u8 tc = adapter->hw_tcs;
5229
5230         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
5231             adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
5232                 hdrm = 32 << adapter->fdir_pballoc;
5233         else
5234                 hdrm = 0;
5235
5236         hw->mac.ops.set_rxpba(hw, tc, hdrm, PBA_STRATEGY_EQUAL);
5237         ixgbe_pbthresh_setup(adapter);
5238 }
5239
5240 static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
5241 {
5242         struct ixgbe_hw *hw = &adapter->hw;
5243         struct hlist_node *node2;
5244         struct ixgbe_fdir_filter *filter;
5245         u8 queue;
5246
5247         spin_lock(&adapter->fdir_perfect_lock);
5248
5249         if (!hlist_empty(&adapter->fdir_filter_list))
5250                 ixgbe_fdir_set_input_mask_82599(hw, &adapter->fdir_mask);
5251
5252         hlist_for_each_entry_safe(filter, node2,
5253                                   &adapter->fdir_filter_list, fdir_node) {
5254                 if (filter->action == IXGBE_FDIR_DROP_QUEUE) {
5255                         queue = IXGBE_FDIR_DROP_QUEUE;
5256                 } else {
5257                         u32 ring = ethtool_get_flow_spec_ring(filter->action);
5258                         u8 vf = ethtool_get_flow_spec_ring_vf(filter->action);
5259
5260                         if (!vf && (ring >= adapter->num_rx_queues)) {
5261                                 e_err(drv, "FDIR restore failed without VF, ring: %u\n",
5262                                       ring);
5263                                 continue;
5264                         } else if (vf &&
5265                                    ((vf > adapter->num_vfs) ||
5266                                      ring >= adapter->num_rx_queues_per_pool)) {
5267                                 e_err(drv, "FDIR restore failed with VF, vf: %hhu, ring: %u\n",
5268                                       vf, ring);
5269                                 continue;
5270                         }
5271
5272                         /* Map the ring onto the absolute queue index */
5273                         if (!vf)
5274                                 queue = adapter->rx_ring[ring]->reg_idx;
5275                         else
5276                                 queue = ((vf - 1) *
5277                                         adapter->num_rx_queues_per_pool) + ring;
5278                 }
5279
5280                 ixgbe_fdir_write_perfect_filter_82599(hw,
5281                                 &filter->filter, filter->sw_idx, queue);
5282         }
5283
5284         spin_unlock(&adapter->fdir_perfect_lock);
5285 }
5286
5287 /**
5288  * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
5289  * @rx_ring: ring to free buffers from
5290  **/
5291 static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring)
5292 {
5293         u16 i = rx_ring->next_to_clean;
5294         struct ixgbe_rx_buffer *rx_buffer = &rx_ring->rx_buffer_info[i];
5295
5296         if (rx_ring->xsk_pool) {
5297                 ixgbe_xsk_clean_rx_ring(rx_ring);
5298                 goto skip_free;
5299         }
5300
5301         /* Free all the Rx ring sk_buffs */
5302         while (i != rx_ring->next_to_alloc) {
5303                 if (rx_buffer->skb) {
5304                         struct sk_buff *skb = rx_buffer->skb;
5305                         if (IXGBE_CB(skb)->page_released)
5306                                 dma_unmap_page_attrs(rx_ring->dev,
5307                                                      IXGBE_CB(skb)->dma,
5308                                                      ixgbe_rx_pg_size(rx_ring),
5309                                                      DMA_FROM_DEVICE,
5310                                                      IXGBE_RX_DMA_ATTR);
5311                         dev_kfree_skb(skb);
5312                 }
5313
5314                 /* Invalidate cache lines that may have been written to by
5315                  * device so that we avoid corrupting memory.
5316                  */
5317                 dma_sync_single_range_for_cpu(rx_ring->dev,
5318                                               rx_buffer->dma,
5319                                               rx_buffer->page_offset,
5320                                               ixgbe_rx_bufsz(rx_ring),
5321                                               DMA_FROM_DEVICE);
5322
5323                 /* free resources associated with mapping */
5324                 dma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma,
5325                                      ixgbe_rx_pg_size(rx_ring),
5326                                      DMA_FROM_DEVICE,
5327                                      IXGBE_RX_DMA_ATTR);
5328                 __page_frag_cache_drain(rx_buffer->page,
5329                                         rx_buffer->pagecnt_bias);
5330
5331                 i++;
5332                 rx_buffer++;
5333                 if (i == rx_ring->count) {
5334                         i = 0;
5335                         rx_buffer = rx_ring->rx_buffer_info;
5336                 }
5337         }
5338
5339 skip_free:
5340         rx_ring->next_to_alloc = 0;
5341         rx_ring->next_to_clean = 0;
5342         rx_ring->next_to_use = 0;
5343 }
5344
5345 static int ixgbe_fwd_ring_up(struct ixgbe_adapter *adapter,
5346                              struct ixgbe_fwd_adapter *accel)
5347 {
5348         u16 rss_i = adapter->ring_feature[RING_F_RSS].indices;
5349         int num_tc = netdev_get_num_tc(adapter->netdev);
5350         struct net_device *vdev = accel->netdev;
5351         int i, baseq, err;
5352
5353         baseq = accel->pool * adapter->num_rx_queues_per_pool;
5354         netdev_dbg(vdev, "pool %i:%i queues %i:%i\n",
5355                    accel->pool, adapter->num_rx_pools,
5356                    baseq, baseq + adapter->num_rx_queues_per_pool);
5357
5358         accel->rx_base_queue = baseq;
5359         accel->tx_base_queue = baseq;
5360
5361         /* record configuration for macvlan interface in vdev */
5362         for (i = 0; i < num_tc; i++)
5363                 netdev_bind_sb_channel_queue(adapter->netdev, vdev,
5364                                              i, rss_i, baseq + (rss_i * i));
5365
5366         for (i = 0; i < adapter->num_rx_queues_per_pool; i++)
5367                 adapter->rx_ring[baseq + i]->netdev = vdev;
5368
5369         /* Guarantee all rings are updated before we update the
5370          * MAC address filter.
5371          */
5372         wmb();
5373
5374         /* ixgbe_add_mac_filter will return an index if it succeeds, so we
5375          * need to only treat it as an error value if it is negative.
5376          */
5377         err = ixgbe_add_mac_filter(adapter, vdev->dev_addr,
5378                                    VMDQ_P(accel->pool));
5379         if (err >= 0)
5380                 return 0;
5381
5382         /* if we cannot add the MAC rule then disable the offload */
5383         macvlan_release_l2fw_offload(vdev);
5384
5385         for (i = 0; i < adapter->num_rx_queues_per_pool; i++)
5386                 adapter->rx_ring[baseq + i]->netdev = NULL;
5387
5388         netdev_err(vdev, "L2FW offload disabled due to L2 filter error\n");
5389
5390         /* unbind the queues and drop the subordinate channel config */
5391         netdev_unbind_sb_channel(adapter->netdev, vdev);
5392         netdev_set_sb_channel(vdev, 0);
5393
5394         clear_bit(accel->pool, adapter->fwd_bitmask);
5395         kfree(accel);
5396
5397         return err;
5398 }
5399
5400 static int ixgbe_macvlan_up(struct net_device *vdev,
5401                             struct netdev_nested_priv *priv)
5402 {
5403         struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)priv->data;
5404         struct ixgbe_fwd_adapter *accel;
5405
5406         if (!netif_is_macvlan(vdev))
5407                 return 0;
5408
5409         accel = macvlan_accel_priv(vdev);
5410         if (!accel)
5411                 return 0;
5412
5413         ixgbe_fwd_ring_up(adapter, accel);
5414
5415         return 0;
5416 }
5417
5418 static void ixgbe_configure_dfwd(struct ixgbe_adapter *adapter)
5419 {
5420         struct netdev_nested_priv priv = {
5421                 .data = (void *)adapter,
5422         };
5423
5424         netdev_walk_all_upper_dev_rcu(adapter->netdev,
5425                                       ixgbe_macvlan_up, &priv);
5426 }
5427
5428 static void ixgbe_configure(struct ixgbe_adapter *adapter)
5429 {
5430         struct ixgbe_hw *hw = &adapter->hw;
5431
5432         ixgbe_configure_pb(adapter);
5433 #ifdef CONFIG_IXGBE_DCB
5434         ixgbe_configure_dcb(adapter);
5435 #endif
5436         /*
5437          * We must restore virtualization before VLANs or else
5438          * the VLVF registers will not be populated
5439          */
5440         ixgbe_configure_virtualization(adapter);
5441
5442         ixgbe_set_rx_mode(adapter->netdev);
5443         ixgbe_restore_vlan(adapter);
5444         ixgbe_ipsec_restore(adapter);
5445
5446         switch (hw->mac.type) {
5447         case ixgbe_mac_82599EB:
5448         case ixgbe_mac_X540:
5449                 hw->mac.ops.disable_rx_buff(hw);
5450                 break;
5451         default:
5452                 break;
5453         }
5454
5455         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
5456                 ixgbe_init_fdir_signature_82599(&adapter->hw,
5457                                                 adapter->fdir_pballoc);
5458         } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
5459                 ixgbe_init_fdir_perfect_82599(&adapter->hw,
5460                                               adapter->fdir_pballoc);
5461                 ixgbe_fdir_filter_restore(adapter);
5462         }
5463
5464         switch (hw->mac.type) {
5465         case ixgbe_mac_82599EB:
5466         case ixgbe_mac_X540:
5467                 hw->mac.ops.enable_rx_buff(hw);
5468                 break;
5469         default:
5470                 break;
5471         }
5472
5473 #ifdef CONFIG_IXGBE_DCA
5474         /* configure DCA */
5475         if (adapter->flags & IXGBE_FLAG_DCA_CAPABLE)
5476                 ixgbe_setup_dca(adapter);
5477 #endif /* CONFIG_IXGBE_DCA */
5478
5479 #ifdef IXGBE_FCOE
5480         /* configure FCoE L2 filters, redirection table, and Rx control */
5481         ixgbe_configure_fcoe(adapter);
5482
5483 #endif /* IXGBE_FCOE */
5484         ixgbe_configure_tx(adapter);
5485         ixgbe_configure_rx(adapter);
5486         ixgbe_configure_dfwd(adapter);
5487 }
5488
5489 /**
5490  * ixgbe_sfp_link_config - set up SFP+ link
5491  * @adapter: pointer to private adapter struct
5492  **/
5493 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
5494 {
5495         /*
5496          * We are assuming the worst case scenario here, and that
5497          * is that an SFP was inserted/removed after the reset
5498          * but before SFP detection was enabled.  As such the best
5499          * solution is to just start searching as soon as we start
5500          */
5501         if (adapter->hw.mac.type == ixgbe_mac_82598EB)
5502                 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
5503
5504         adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
5505         adapter->sfp_poll_time = 0;
5506 }
5507
5508 /**
5509  * ixgbe_non_sfp_link_config - set up non-SFP+ link
5510  * @hw: pointer to private hardware struct
5511  *
5512  * Returns 0 on success, negative on failure
5513  **/
5514 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
5515 {
5516         u32 speed;
5517         bool autoneg, link_up = false;
5518         int ret = IXGBE_ERR_LINK_SETUP;
5519
5520         if (hw->mac.ops.check_link)
5521                 ret = hw->mac.ops.check_link(hw, &speed, &link_up, false);
5522
5523         if (ret)
5524                 return ret;
5525
5526         speed = hw->phy.autoneg_advertised;
5527         if (!speed && hw->mac.ops.get_link_capabilities) {
5528                 ret = hw->mac.ops.get_link_capabilities(hw, &speed,
5529                                                         &autoneg);
5530                 speed &= ~(IXGBE_LINK_SPEED_5GB_FULL |
5531                            IXGBE_LINK_SPEED_2_5GB_FULL);
5532         }
5533
5534         if (ret)
5535                 return ret;
5536
5537         if (hw->mac.ops.setup_link)
5538                 ret = hw->mac.ops.setup_link(hw, speed, link_up);
5539
5540         return ret;
5541 }
5542
5543 static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
5544 {
5545         struct ixgbe_hw *hw = &adapter->hw;
5546         u32 gpie = 0;
5547
5548         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
5549                 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
5550                        IXGBE_GPIE_OCD;
5551                 gpie |= IXGBE_GPIE_EIAME;
5552                 /*
5553                  * use EIAM to auto-mask when MSI-X interrupt is asserted
5554                  * this saves a register write for every interrupt
5555                  */
5556                 switch (hw->mac.type) {
5557                 case ixgbe_mac_82598EB:
5558                         IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
5559                         break;
5560                 case ixgbe_mac_82599EB:
5561                 case ixgbe_mac_X540:
5562                 case ixgbe_mac_X550:
5563                 case ixgbe_mac_X550EM_x:
5564                 case ixgbe_mac_x550em_a:
5565                 default:
5566                         IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
5567                         IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
5568                         break;
5569                 }
5570         } else {
5571                 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
5572                  * specifically only auto mask tx and rx interrupts */
5573                 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
5574         }
5575
5576         /* XXX: to interrupt immediately for EICS writes, enable this */
5577         /* gpie |= IXGBE_GPIE_EIMEN; */
5578
5579         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
5580                 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
5581
5582                 switch (adapter->ring_feature[RING_F_VMDQ].mask) {
5583                 case IXGBE_82599_VMDQ_8Q_MASK:
5584                         gpie |= IXGBE_GPIE_VTMODE_16;
5585                         break;
5586                 case IXGBE_82599_VMDQ_4Q_MASK:
5587                         gpie |= IXGBE_GPIE_VTMODE_32;
5588                         break;
5589                 default:
5590                         gpie |= IXGBE_GPIE_VTMODE_64;
5591                         break;
5592                 }
5593         }
5594
5595         /* Enable Thermal over heat sensor interrupt */
5596         if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
5597                 switch (adapter->hw.mac.type) {
5598                 case ixgbe_mac_82599EB:
5599                         gpie |= IXGBE_SDP0_GPIEN_8259X;
5600                         break;
5601                 default:
5602                         break;
5603                 }
5604         }
5605
5606         /* Enable fan failure interrupt */
5607         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
5608                 gpie |= IXGBE_SDP1_GPIEN(hw);
5609
5610         switch (hw->mac.type) {
5611         case ixgbe_mac_82599EB:
5612                 gpie |= IXGBE_SDP1_GPIEN_8259X | IXGBE_SDP2_GPIEN_8259X;
5613                 break;
5614         case ixgbe_mac_X550EM_x:
5615         case ixgbe_mac_x550em_a:
5616                 gpie |= IXGBE_SDP0_GPIEN_X540;
5617                 break;
5618         default:
5619                 break;
5620         }
5621
5622         IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
5623 }
5624
5625 static void ixgbe_up_complete(struct ixgbe_adapter *adapter)
5626 {
5627         struct ixgbe_hw *hw = &adapter->hw;
5628         int err;
5629         u32 ctrl_ext;
5630
5631         ixgbe_get_hw_control(adapter);
5632         ixgbe_setup_gpie(adapter);
5633
5634         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
5635                 ixgbe_configure_msix(adapter);
5636         else
5637                 ixgbe_configure_msi_and_legacy(adapter);
5638
5639         /* enable the optics for 82599 SFP+ fiber */
5640         if (hw->mac.ops.enable_tx_laser)
5641                 hw->mac.ops.enable_tx_laser(hw);
5642
5643         if (hw->phy.ops.set_phy_power)
5644                 hw->phy.ops.set_phy_power(hw, true);
5645
5646         smp_mb__before_atomic();
5647         clear_bit(__IXGBE_DOWN, &adapter->state);
5648         ixgbe_napi_enable_all(adapter);
5649
5650         if (ixgbe_is_sfp(hw)) {
5651                 ixgbe_sfp_link_config(adapter);
5652         } else {
5653                 err = ixgbe_non_sfp_link_config(hw);
5654                 if (err)
5655                         e_err(probe, "link_config FAILED %d\n", err);
5656         }
5657
5658         /* clear any pending interrupts, may auto mask */
5659         IXGBE_READ_REG(hw, IXGBE_EICR);
5660         ixgbe_irq_enable(adapter, true, true);
5661
5662         /*
5663          * If this adapter has a fan, check to see if we had a failure
5664          * before we enabled the interrupt.
5665          */
5666         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
5667                 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
5668                 if (esdp & IXGBE_ESDP_SDP1)
5669                         e_crit(drv, "Fan has stopped, replace the adapter\n");
5670         }
5671
5672         /* bring the link up in the watchdog, this could race with our first
5673          * link up interrupt but shouldn't be a problem */
5674         adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
5675         adapter->link_check_timeout = jiffies;
5676         mod_timer(&adapter->service_timer, jiffies);
5677
5678         /* Set PF Reset Done bit so PF/VF Mail Ops can work */
5679         ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
5680         ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
5681         IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
5682 }
5683
5684 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
5685 {
5686         /* put off any impending NetWatchDogTimeout */
5687         netif_trans_update(adapter->netdev);
5688
5689         while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
5690                 usleep_range(1000, 2000);
5691         if (adapter->hw.phy.type == ixgbe_phy_fw)
5692                 ixgbe_watchdog_link_is_down(adapter);
5693         ixgbe_down(adapter);
5694         /*
5695          * If SR-IOV enabled then wait a bit before bringing the adapter
5696          * back up to give the VFs time to respond to the reset.  The
5697          * two second wait is based upon the watchdog timer cycle in
5698          * the VF driver.
5699          */
5700         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
5701                 msleep(2000);
5702         ixgbe_up(adapter);
5703         clear_bit(__IXGBE_RESETTING, &adapter->state);
5704 }
5705
5706 void ixgbe_up(struct ixgbe_adapter *adapter)
5707 {
5708         /* hardware has been reset, we need to reload some things */
5709         ixgbe_configure(adapter);
5710
5711         ixgbe_up_complete(adapter);
5712 }
5713
5714 static unsigned long ixgbe_get_completion_timeout(struct ixgbe_adapter *adapter)
5715 {
5716         u16 devctl2;
5717
5718         pcie_capability_read_word(adapter->pdev, PCI_EXP_DEVCTL2, &devctl2);
5719
5720         switch (devctl2 & IXGBE_PCIDEVCTRL2_TIMEO_MASK) {
5721         case IXGBE_PCIDEVCTRL2_17_34s:
5722         case IXGBE_PCIDEVCTRL2_4_8s:
5723                 /* For now we cap the upper limit on delay to 2 seconds
5724                  * as we end up going up to 34 seconds of delay in worst
5725                  * case timeout value.
5726                  */
5727         case IXGBE_PCIDEVCTRL2_1_2s:
5728                 return 2000000ul;       /* 2.0 s */
5729         case IXGBE_PCIDEVCTRL2_260_520ms:
5730                 return 520000ul;        /* 520 ms */
5731         case IXGBE_PCIDEVCTRL2_65_130ms:
5732                 return 130000ul;        /* 130 ms */
5733         case IXGBE_PCIDEVCTRL2_16_32ms:
5734                 return 32000ul;         /* 32 ms */
5735         case IXGBE_PCIDEVCTRL2_1_2ms:
5736                 return 2000ul;          /* 2 ms */
5737         case IXGBE_PCIDEVCTRL2_50_100us:
5738                 return 100ul;           /* 100 us */
5739         case IXGBE_PCIDEVCTRL2_16_32ms_def:
5740                 return 32000ul;         /* 32 ms */
5741         default:
5742                 break;
5743         }
5744
5745         /* We shouldn't need to hit this path, but just in case default as
5746          * though completion timeout is not supported and support 32ms.
5747          */
5748         return 32000ul;
5749 }
5750
5751 void ixgbe_disable_rx(struct ixgbe_adapter *adapter)
5752 {
5753         unsigned long wait_delay, delay_interval;
5754         struct ixgbe_hw *hw = &adapter->hw;
5755         int i, wait_loop;
5756         u32 rxdctl;
5757
5758         /* disable receives */
5759         hw->mac.ops.disable_rx(hw);
5760
5761         if (ixgbe_removed(hw->hw_addr))
5762                 return;
5763
5764         /* disable all enabled Rx queues */
5765         for (i = 0; i < adapter->num_rx_queues; i++) {
5766                 struct ixgbe_ring *ring = adapter->rx_ring[i];
5767                 u8 reg_idx = ring->reg_idx;
5768
5769                 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
5770                 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
5771                 rxdctl |= IXGBE_RXDCTL_SWFLSH;
5772
5773                 /* write value back with RXDCTL.ENABLE bit cleared */
5774                 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
5775         }
5776
5777         /* RXDCTL.EN may not change on 82598 if link is down, so skip it */
5778         if (hw->mac.type == ixgbe_mac_82598EB &&
5779             !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
5780                 return;
5781
5782         /* Determine our minimum delay interval. We will increase this value
5783          * with each subsequent test. This way if the device returns quickly
5784          * we should spend as little time as possible waiting, however as
5785          * the time increases we will wait for larger periods of time.
5786          *
5787          * The trick here is that we increase the interval using the
5788          * following pattern: 1x 3x 5x 7x 9x 11x 13x 15x 17x 19x. The result
5789          * of that wait is that it totals up to 100x whatever interval we
5790          * choose. Since our minimum wait is 100us we can just divide the
5791          * total timeout by 100 to get our minimum delay interval.
5792          */
5793         delay_interval = ixgbe_get_completion_timeout(adapter) / 100;
5794
5795         wait_loop = IXGBE_MAX_RX_DESC_POLL;
5796         wait_delay = delay_interval;
5797
5798         while (wait_loop--) {
5799                 usleep_range(wait_delay, wait_delay + 10);
5800                 wait_delay += delay_interval * 2;
5801                 rxdctl = 0;
5802
5803                 /* OR together the reading of all the active RXDCTL registers,
5804                  * and then test the result. We need the disable to complete
5805                  * before we start freeing the memory and invalidating the
5806                  * DMA mappings.
5807                  */
5808                 for (i = 0; i < adapter->num_rx_queues; i++) {
5809                         struct ixgbe_ring *ring = adapter->rx_ring[i];
5810                         u8 reg_idx = ring->reg_idx;
5811
5812                         rxdctl |= IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
5813                 }
5814
5815                 if (!(rxdctl & IXGBE_RXDCTL_ENABLE))
5816                         return;
5817         }
5818
5819         e_err(drv,
5820               "RXDCTL.ENABLE for one or more queues not cleared within the polling period\n");
5821 }
5822
5823 void ixgbe_disable_tx(struct ixgbe_adapter *adapter)
5824 {
5825         unsigned long wait_delay, delay_interval;
5826         struct ixgbe_hw *hw = &adapter->hw;
5827         int i, wait_loop;
5828         u32 txdctl;
5829
5830         if (ixgbe_removed(hw->hw_addr))
5831                 return;
5832
5833         /* disable all enabled Tx queues */
5834         for (i = 0; i < adapter->num_tx_queues; i++) {
5835                 struct ixgbe_ring *ring = adapter->tx_ring[i];
5836                 u8 reg_idx = ring->reg_idx;
5837
5838                 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
5839         }
5840
5841         /* disable all enabled XDP Tx queues */
5842         for (i = 0; i < adapter->num_xdp_queues; i++) {
5843                 struct ixgbe_ring *ring = adapter->xdp_ring[i];
5844                 u8 reg_idx = ring->reg_idx;
5845
5846                 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
5847         }
5848
5849         /* If the link is not up there shouldn't be much in the way of
5850          * pending transactions. Those that are left will be flushed out
5851          * when the reset logic goes through the flush sequence to clean out
5852          * the pending Tx transactions.
5853          */
5854         if (!(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
5855                 goto dma_engine_disable;
5856
5857         /* Determine our minimum delay interval. We will increase this value
5858          * with each subsequent test. This way if the device returns quickly
5859          * we should spend as little time as possible waiting, however as
5860          * the time increases we will wait for larger periods of time.
5861          *
5862          * The trick here is that we increase the interval using the
5863          * following pattern: 1x 3x 5x 7x 9x 11x 13x 15x 17x 19x. The result
5864          * of that wait is that it totals up to 100x whatever interval we
5865          * choose. Since our minimum wait is 100us we can just divide the
5866          * total timeout by 100 to get our minimum delay interval.
5867          */
5868         delay_interval = ixgbe_get_completion_timeout(adapter) / 100;
5869
5870         wait_loop = IXGBE_MAX_RX_DESC_POLL;
5871         wait_delay = delay_interval;
5872
5873         while (wait_loop--) {
5874                 usleep_range(wait_delay, wait_delay + 10);
5875                 wait_delay += delay_interval * 2;
5876                 txdctl = 0;
5877
5878                 /* OR together the reading of all the active TXDCTL registers,
5879                  * and then test the result. We need the disable to complete
5880                  * before we start freeing the memory and invalidating the
5881                  * DMA mappings.
5882                  */
5883                 for (i = 0; i < adapter->num_tx_queues; i++) {
5884                         struct ixgbe_ring *ring = adapter->tx_ring[i];
5885                         u8 reg_idx = ring->reg_idx;
5886
5887                         txdctl |= IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
5888                 }
5889                 for (i = 0; i < adapter->num_xdp_queues; i++) {
5890                         struct ixgbe_ring *ring = adapter->xdp_ring[i];
5891                         u8 reg_idx = ring->reg_idx;
5892
5893                         txdctl |= IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
5894                 }
5895
5896                 if (!(txdctl & IXGBE_TXDCTL_ENABLE))
5897                         goto dma_engine_disable;
5898         }
5899
5900         e_err(drv,
5901               "TXDCTL.ENABLE for one or more queues not cleared within the polling period\n");
5902
5903 dma_engine_disable:
5904         /* Disable the Tx DMA engine on 82599 and later MAC */
5905         switch (hw->mac.type) {
5906         case ixgbe_mac_82599EB:
5907         case ixgbe_mac_X540:
5908         case ixgbe_mac_X550:
5909         case ixgbe_mac_X550EM_x:
5910         case ixgbe_mac_x550em_a:
5911                 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
5912                                 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
5913                                  ~IXGBE_DMATXCTL_TE));
5914                 fallthrough;
5915         default:
5916                 break;
5917         }
5918 }
5919
5920 void ixgbe_reset(struct ixgbe_adapter *adapter)
5921 {
5922         struct ixgbe_hw *hw = &adapter->hw;
5923         struct net_device *netdev = adapter->netdev;
5924         int err;
5925
5926         if (ixgbe_removed(hw->hw_addr))
5927                 return;
5928         /* lock SFP init bit to prevent race conditions with the watchdog */
5929         while (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
5930                 usleep_range(1000, 2000);
5931
5932         /* clear all SFP and link config related flags while holding SFP_INIT */
5933         adapter->flags2 &= ~(IXGBE_FLAG2_SEARCH_FOR_SFP |
5934                              IXGBE_FLAG2_SFP_NEEDS_RESET);
5935         adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
5936
5937         err = hw->mac.ops.init_hw(hw);
5938         switch (err) {
5939         case 0:
5940         case IXGBE_ERR_SFP_NOT_PRESENT:
5941         case IXGBE_ERR_SFP_NOT_SUPPORTED:
5942                 break;
5943         case IXGBE_ERR_MASTER_REQUESTS_PENDING:
5944                 e_dev_err("master disable timed out\n");
5945                 break;
5946         case IXGBE_ERR_EEPROM_VERSION:
5947                 /* We are running on a pre-production device, log a warning */
5948                 e_dev_warn("This device is a pre-production adapter/LOM. "
5949                            "Please be aware there may be issues associated with "
5950                            "your hardware.  If you are experiencing problems "
5951                            "please contact your Intel or hardware "
5952                            "representative who provided you with this "
5953                            "hardware.\n");
5954                 break;
5955         default:
5956                 e_dev_err("Hardware Error: %d\n", err);
5957         }
5958
5959         clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
5960
5961         /* flush entries out of MAC table */
5962         ixgbe_flush_sw_mac_table(adapter);
5963         __dev_uc_unsync(netdev, NULL);
5964
5965         /* do not flush user set addresses */
5966         ixgbe_mac_set_default_filter(adapter);
5967
5968         /* update SAN MAC vmdq pool selection */
5969         if (hw->mac.san_mac_rar_index)
5970                 hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0));
5971
5972         if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
5973                 ixgbe_ptp_reset(adapter);
5974
5975         if (hw->phy.ops.set_phy_power) {
5976                 if (!netif_running(adapter->netdev) && !adapter->wol)
5977                         hw->phy.ops.set_phy_power(hw, false);
5978                 else
5979                         hw->phy.ops.set_phy_power(hw, true);
5980         }
5981 }
5982
5983 /**
5984  * ixgbe_clean_tx_ring - Free Tx Buffers
5985  * @tx_ring: ring to be cleaned
5986  **/
5987 static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring)
5988 {
5989         u16 i = tx_ring->next_to_clean;
5990         struct ixgbe_tx_buffer *tx_buffer = &tx_ring->tx_buffer_info[i];
5991
5992         if (tx_ring->xsk_pool) {
5993                 ixgbe_xsk_clean_tx_ring(tx_ring);
5994                 goto out;
5995         }
5996
5997         while (i != tx_ring->next_to_use) {
5998                 union ixgbe_adv_tx_desc *eop_desc, *tx_desc;
5999
6000                 /* Free all the Tx ring sk_buffs */
6001                 if (ring_is_xdp(tx_ring))
6002                         xdp_return_frame(tx_buffer->xdpf);
6003                 else
6004                         dev_kfree_skb_any(tx_buffer->skb);
6005
6006                 /* unmap skb header data */
6007                 dma_unmap_single(tx_ring->dev,
6008                                  dma_unmap_addr(tx_buffer, dma),
6009                                  dma_unmap_len(tx_buffer, len),
6010                                  DMA_TO_DEVICE);
6011
6012                 /* check for eop_desc to determine the end of the packet */
6013                 eop_desc = tx_buffer->next_to_watch;
6014                 tx_desc = IXGBE_TX_DESC(tx_ring, i);
6015
6016                 /* unmap remaining buffers */
6017                 while (tx_desc != eop_desc) {
6018                         tx_buffer++;
6019                         tx_desc++;
6020                         i++;
6021                         if (unlikely(i == tx_ring->count)) {
6022                                 i = 0;
6023                                 tx_buffer = tx_ring->tx_buffer_info;
6024                                 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
6025                         }
6026
6027                         /* unmap any remaining paged data */
6028                         if (dma_unmap_len(tx_buffer, len))
6029                                 dma_unmap_page(tx_ring->dev,
6030                                                dma_unmap_addr(tx_buffer, dma),
6031                                                dma_unmap_len(tx_buffer, len),
6032                                                DMA_TO_DEVICE);
6033                 }
6034
6035                 /* move us one more past the eop_desc for start of next pkt */
6036                 tx_buffer++;
6037                 i++;
6038                 if (unlikely(i == tx_ring->count)) {
6039                         i = 0;
6040                         tx_buffer = tx_ring->tx_buffer_info;
6041                 }
6042         }
6043
6044         /* reset BQL for queue */
6045         if (!ring_is_xdp(tx_ring))
6046                 netdev_tx_reset_queue(txring_txq(tx_ring));
6047
6048 out:
6049         /* reset next_to_use and next_to_clean */
6050         tx_ring->next_to_use = 0;
6051         tx_ring->next_to_clean = 0;
6052 }
6053
6054 /**
6055  * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
6056  * @adapter: board private structure
6057  **/
6058 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
6059 {
6060         int i;
6061
6062         for (i = 0; i < adapter->num_rx_queues; i++)
6063                 ixgbe_clean_rx_ring(adapter->rx_ring[i]);
6064 }
6065
6066 /**
6067  * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
6068  * @adapter: board private structure
6069  **/
6070 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
6071 {
6072         int i;
6073
6074         for (i = 0; i < adapter->num_tx_queues; i++)
6075                 ixgbe_clean_tx_ring(adapter->tx_ring[i]);
6076         for (i = 0; i < adapter->num_xdp_queues; i++)
6077                 ixgbe_clean_tx_ring(adapter->xdp_ring[i]);
6078 }
6079
6080 static void ixgbe_fdir_filter_exit(struct ixgbe_adapter *adapter)
6081 {
6082         struct hlist_node *node2;
6083         struct ixgbe_fdir_filter *filter;
6084
6085         spin_lock(&adapter->fdir_perfect_lock);
6086
6087         hlist_for_each_entry_safe(filter, node2,
6088                                   &adapter->fdir_filter_list, fdir_node) {
6089                 hlist_del(&filter->fdir_node);
6090                 kfree(filter);
6091         }
6092         adapter->fdir_filter_count = 0;
6093
6094         spin_unlock(&adapter->fdir_perfect_lock);
6095 }
6096
6097 void ixgbe_down(struct ixgbe_adapter *adapter)
6098 {
6099         struct net_device *netdev = adapter->netdev;
6100         struct ixgbe_hw *hw = &adapter->hw;
6101         int i;
6102
6103         /* signal that we are down to the interrupt handler */
6104         if (test_and_set_bit(__IXGBE_DOWN, &adapter->state))
6105                 return; /* do nothing if already down */
6106
6107         /* Shut off incoming Tx traffic */
6108         netif_tx_stop_all_queues(netdev);
6109
6110         /* call carrier off first to avoid false dev_watchdog timeouts */
6111         netif_carrier_off(netdev);
6112         netif_tx_disable(netdev);
6113
6114         /* Disable Rx */
6115         ixgbe_disable_rx(adapter);
6116
6117         /* synchronize_rcu() needed for pending XDP buffers to drain */
6118         if (adapter->xdp_ring[0])
6119                 synchronize_rcu();
6120
6121         ixgbe_irq_disable(adapter);
6122
6123         ixgbe_napi_disable_all(adapter);
6124
6125         clear_bit(__IXGBE_RESET_REQUESTED, &adapter->state);
6126         adapter->flags2 &= ~IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
6127         adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
6128
6129         del_timer_sync(&adapter->service_timer);
6130
6131         if (adapter->num_vfs) {
6132                 /* Clear EITR Select mapping */
6133                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
6134
6135                 /* Mark all the VFs as inactive */
6136                 for (i = 0 ; i < adapter->num_vfs; i++)
6137                         adapter->vfinfo[i].clear_to_send = false;
6138
6139                 /* ping all the active vfs to let them know we are going down */
6140                 ixgbe_ping_all_vfs(adapter);
6141
6142                 /* Disable all VFTE/VFRE TX/RX */
6143                 ixgbe_disable_tx_rx(adapter);
6144         }
6145
6146         /* disable transmits in the hardware now that interrupts are off */
6147         ixgbe_disable_tx(adapter);
6148
6149         if (!pci_channel_offline(adapter->pdev))
6150                 ixgbe_reset(adapter);
6151
6152         /* power down the optics for 82599 SFP+ fiber */
6153         if (hw->mac.ops.disable_tx_laser)
6154                 hw->mac.ops.disable_tx_laser(hw);
6155
6156         ixgbe_clean_all_tx_rings(adapter);
6157         ixgbe_clean_all_rx_rings(adapter);
6158 }
6159
6160 /**
6161  * ixgbe_set_eee_capable - helper function to determine EEE support on X550
6162  * @adapter: board private structure
6163  */
6164 static void ixgbe_set_eee_capable(struct ixgbe_adapter *adapter)
6165 {
6166         struct ixgbe_hw *hw = &adapter->hw;
6167
6168         switch (hw->device_id) {
6169         case IXGBE_DEV_ID_X550EM_A_1G_T:
6170         case IXGBE_DEV_ID_X550EM_A_1G_T_L:
6171                 if (!hw->phy.eee_speeds_supported)
6172                         break;
6173                 adapter->flags2 |= IXGBE_FLAG2_EEE_CAPABLE;
6174                 if (!hw->phy.eee_speeds_advertised)
6175                         break;
6176                 adapter->flags2 |= IXGBE_FLAG2_EEE_ENABLED;
6177                 break;
6178         default:
6179                 adapter->flags2 &= ~IXGBE_FLAG2_EEE_CAPABLE;
6180                 adapter->flags2 &= ~IXGBE_FLAG2_EEE_ENABLED;
6181                 break;
6182         }
6183 }
6184
6185 /**
6186  * ixgbe_tx_timeout - Respond to a Tx Hang
6187  * @netdev: network interface device structure
6188  * @txqueue: queue number that timed out
6189  **/
6190 static void ixgbe_tx_timeout(struct net_device *netdev, unsigned int __always_unused txqueue)
6191 {
6192         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6193
6194         /* Do the reset outside of interrupt context */
6195         ixgbe_tx_timeout_reset(adapter);
6196 }
6197
6198 #ifdef CONFIG_IXGBE_DCB
6199 static void ixgbe_init_dcb(struct ixgbe_adapter *adapter)
6200 {
6201         struct ixgbe_hw *hw = &adapter->hw;
6202         struct tc_configuration *tc;
6203         int j;
6204
6205         switch (hw->mac.type) {
6206         case ixgbe_mac_82598EB:
6207         case ixgbe_mac_82599EB:
6208                 adapter->dcb_cfg.num_tcs.pg_tcs = MAX_TRAFFIC_CLASS;
6209                 adapter->dcb_cfg.num_tcs.pfc_tcs = MAX_TRAFFIC_CLASS;
6210                 break;
6211         case ixgbe_mac_X540:
6212         case ixgbe_mac_X550:
6213                 adapter->dcb_cfg.num_tcs.pg_tcs = X540_TRAFFIC_CLASS;
6214                 adapter->dcb_cfg.num_tcs.pfc_tcs = X540_TRAFFIC_CLASS;
6215                 break;
6216         case ixgbe_mac_X550EM_x:
6217         case ixgbe_mac_x550em_a:
6218         default:
6219                 adapter->dcb_cfg.num_tcs.pg_tcs = DEF_TRAFFIC_CLASS;
6220                 adapter->dcb_cfg.num_tcs.pfc_tcs = DEF_TRAFFIC_CLASS;
6221                 break;
6222         }
6223
6224         /* Configure DCB traffic classes */
6225         for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
6226                 tc = &adapter->dcb_cfg.tc_config[j];
6227                 tc->path[DCB_TX_CONFIG].bwg_id = 0;
6228                 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
6229                 tc->path[DCB_RX_CONFIG].bwg_id = 0;
6230                 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
6231                 tc->dcb_pfc = pfc_disabled;
6232         }
6233
6234         /* Initialize default user to priority mapping, UPx->TC0 */
6235         tc = &adapter->dcb_cfg.tc_config[0];
6236         tc->path[DCB_TX_CONFIG].up_to_tc_bitmap = 0xFF;
6237         tc->path[DCB_RX_CONFIG].up_to_tc_bitmap = 0xFF;
6238
6239         adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
6240         adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
6241         adapter->dcb_cfg.pfc_mode_enable = false;
6242         adapter->dcb_set_bitmap = 0x00;
6243         if (adapter->flags & IXGBE_FLAG_DCB_CAPABLE)
6244                 adapter->dcbx_cap = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_CEE;
6245         memcpy(&adapter->temp_dcb_cfg, &adapter->dcb_cfg,
6246                sizeof(adapter->temp_dcb_cfg));
6247 }
6248 #endif
6249
6250 /**
6251  * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
6252  * @adapter: board private structure to initialize
6253  * @ii: pointer to ixgbe_info for device
6254  *
6255  * ixgbe_sw_init initializes the Adapter private data structure.
6256  * Fields are initialized based on PCI device information and
6257  * OS network device settings (MTU size).
6258  **/
6259 static int ixgbe_sw_init(struct ixgbe_adapter *adapter,
6260                          const struct ixgbe_info *ii)
6261 {
6262         struct ixgbe_hw *hw = &adapter->hw;
6263         struct pci_dev *pdev = adapter->pdev;
6264         unsigned int rss, fdir;
6265         u32 fwsm;
6266         int i;
6267
6268         /* PCI config space info */
6269
6270         hw->vendor_id = pdev->vendor;
6271         hw->device_id = pdev->device;
6272         hw->revision_id = pdev->revision;
6273         hw->subsystem_vendor_id = pdev->subsystem_vendor;
6274         hw->subsystem_device_id = pdev->subsystem_device;
6275
6276         /* get_invariants needs the device IDs */
6277         ii->get_invariants(hw);
6278
6279         /* Set common capability flags and settings */
6280         rss = min_t(int, ixgbe_max_rss_indices(adapter), num_online_cpus());
6281         adapter->ring_feature[RING_F_RSS].limit = rss;
6282         adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
6283         adapter->max_q_vectors = MAX_Q_VECTORS_82599;
6284         adapter->atr_sample_rate = 20;
6285         fdir = min_t(int, IXGBE_MAX_FDIR_INDICES, num_online_cpus());
6286         adapter->ring_feature[RING_F_FDIR].limit = fdir;
6287         adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_64K;
6288         adapter->ring_feature[RING_F_VMDQ].limit = 1;
6289 #ifdef CONFIG_IXGBE_DCA
6290         adapter->flags |= IXGBE_FLAG_DCA_CAPABLE;
6291 #endif
6292 #ifdef CONFIG_IXGBE_DCB
6293         adapter->flags |= IXGBE_FLAG_DCB_CAPABLE;
6294         adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
6295 #endif
6296 #ifdef IXGBE_FCOE
6297         adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
6298         adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
6299 #ifdef CONFIG_IXGBE_DCB
6300         /* Default traffic class to use for FCoE */
6301         adapter->fcoe.up = IXGBE_FCOE_DEFTC;
6302 #endif /* CONFIG_IXGBE_DCB */
6303 #endif /* IXGBE_FCOE */
6304
6305         /* initialize static ixgbe jump table entries */
6306         adapter->jump_tables[0] = kzalloc(sizeof(*adapter->jump_tables[0]),
6307                                           GFP_KERNEL);
6308         if (!adapter->jump_tables[0])
6309                 return -ENOMEM;
6310         adapter->jump_tables[0]->mat = ixgbe_ipv4_fields;
6311
6312         for (i = 1; i < IXGBE_MAX_LINK_HANDLE; i++)
6313                 adapter->jump_tables[i] = NULL;
6314
6315         adapter->mac_table = kcalloc(hw->mac.num_rar_entries,
6316                                      sizeof(struct ixgbe_mac_addr),
6317                                      GFP_KERNEL);
6318         if (!adapter->mac_table)
6319                 return -ENOMEM;
6320
6321         if (ixgbe_init_rss_key(adapter))
6322                 return -ENOMEM;
6323
6324         adapter->af_xdp_zc_qps = bitmap_zalloc(MAX_XDP_QUEUES, GFP_KERNEL);
6325         if (!adapter->af_xdp_zc_qps)
6326                 return -ENOMEM;
6327
6328         /* Set MAC specific capability flags and exceptions */
6329         switch (hw->mac.type) {
6330         case ixgbe_mac_82598EB:
6331                 adapter->flags2 &= ~IXGBE_FLAG2_RSC_CAPABLE;
6332
6333                 if (hw->device_id == IXGBE_DEV_ID_82598AT)
6334                         adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
6335
6336                 adapter->max_q_vectors = MAX_Q_VECTORS_82598;
6337                 adapter->ring_feature[RING_F_FDIR].limit = 0;
6338                 adapter->atr_sample_rate = 0;
6339                 adapter->fdir_pballoc = 0;
6340 #ifdef IXGBE_FCOE
6341                 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
6342                 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
6343 #ifdef CONFIG_IXGBE_DCB
6344                 adapter->fcoe.up = 0;
6345 #endif /* IXGBE_DCB */
6346 #endif /* IXGBE_FCOE */
6347                 break;
6348         case ixgbe_mac_82599EB:
6349                 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
6350                         adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
6351                 break;
6352         case ixgbe_mac_X540:
6353                 fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM(hw));
6354                 if (fwsm & IXGBE_FWSM_TS_ENABLED)
6355                         adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
6356                 break;
6357         case ixgbe_mac_x550em_a:
6358                 switch (hw->device_id) {
6359                 case IXGBE_DEV_ID_X550EM_A_1G_T:
6360                 case IXGBE_DEV_ID_X550EM_A_1G_T_L:
6361                         adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
6362                         break;
6363                 default:
6364                         break;
6365                 }
6366                 fallthrough;
6367         case ixgbe_mac_X550EM_x:
6368 #ifdef CONFIG_IXGBE_DCB
6369                 adapter->flags &= ~IXGBE_FLAG_DCB_CAPABLE;
6370 #endif
6371 #ifdef IXGBE_FCOE
6372                 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
6373 #ifdef CONFIG_IXGBE_DCB
6374                 adapter->fcoe.up = 0;
6375 #endif /* IXGBE_DCB */
6376 #endif /* IXGBE_FCOE */
6377                 fallthrough;
6378         case ixgbe_mac_X550:
6379                 if (hw->mac.type == ixgbe_mac_X550)
6380                         adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
6381 #ifdef CONFIG_IXGBE_DCA
6382                 adapter->flags &= ~IXGBE_FLAG_DCA_CAPABLE;
6383 #endif
6384                 break;
6385         default:
6386                 break;
6387         }
6388
6389 #ifdef IXGBE_FCOE
6390         /* FCoE support exists, always init the FCoE lock */
6391         spin_lock_init(&adapter->fcoe.lock);
6392
6393 #endif
6394         /* n-tuple support exists, always init our spinlock */
6395         spin_lock_init(&adapter->fdir_perfect_lock);
6396
6397 #ifdef CONFIG_IXGBE_DCB
6398         ixgbe_init_dcb(adapter);
6399 #endif
6400         ixgbe_init_ipsec_offload(adapter);
6401
6402         /* default flow control settings */
6403         hw->fc.requested_mode = ixgbe_fc_full;
6404         hw->fc.current_mode = ixgbe_fc_full;    /* init for ethtool output */
6405         ixgbe_pbthresh_setup(adapter);
6406         hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
6407         hw->fc.send_xon = true;
6408         hw->fc.disable_fc_autoneg = ixgbe_device_supports_autoneg_fc(hw);
6409
6410 #ifdef CONFIG_PCI_IOV
6411         if (max_vfs > 0)
6412                 e_dev_warn("Enabling SR-IOV VFs using the max_vfs module parameter is deprecated - please use the pci sysfs interface instead.\n");
6413
6414         /* assign number of SR-IOV VFs */
6415         if (hw->mac.type != ixgbe_mac_82598EB) {
6416                 if (max_vfs > IXGBE_MAX_VFS_DRV_LIMIT) {
6417                         max_vfs = 0;
6418                         e_dev_warn("max_vfs parameter out of range. Not assigning any SR-IOV VFs\n");
6419                 }
6420         }
6421 #endif /* CONFIG_PCI_IOV */
6422
6423         /* enable itr by default in dynamic mode */
6424         adapter->rx_itr_setting = 1;
6425         adapter->tx_itr_setting = 1;
6426
6427         /* set default ring sizes */
6428         adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
6429         adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
6430
6431         /* set default work limits */
6432         adapter->tx_work_limit = IXGBE_DEFAULT_TX_WORK;
6433
6434         /* initialize eeprom parameters */
6435         if (ixgbe_init_eeprom_params_generic(hw)) {
6436                 e_dev_err("EEPROM initialization failed\n");
6437                 return -EIO;
6438         }
6439
6440         /* PF holds first pool slot */
6441         set_bit(0, adapter->fwd_bitmask);
6442         set_bit(__IXGBE_DOWN, &adapter->state);
6443
6444         return 0;
6445 }
6446
6447 /**
6448  * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
6449  * @tx_ring:    tx descriptor ring (for a specific queue) to setup
6450  *
6451  * Return 0 on success, negative on failure
6452  **/
6453 int ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring)
6454 {
6455         struct device *dev = tx_ring->dev;
6456         int orig_node = dev_to_node(dev);
6457         int ring_node = NUMA_NO_NODE;
6458         int size;
6459
6460         size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
6461
6462         if (tx_ring->q_vector)
6463                 ring_node = tx_ring->q_vector->numa_node;
6464
6465         tx_ring->tx_buffer_info = vmalloc_node(size, ring_node);
6466         if (!tx_ring->tx_buffer_info)
6467                 tx_ring->tx_buffer_info = vmalloc(size);
6468         if (!tx_ring->tx_buffer_info)
6469                 goto err;
6470
6471         /* round up to nearest 4K */
6472         tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
6473         tx_ring->size = ALIGN(tx_ring->size, 4096);
6474
6475         set_dev_node(dev, ring_node);
6476         tx_ring->desc = dma_alloc_coherent(dev,
6477                                            tx_ring->size,
6478                                            &tx_ring->dma,
6479                                            GFP_KERNEL);
6480         set_dev_node(dev, orig_node);
6481         if (!tx_ring->desc)
6482                 tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
6483                                                    &tx_ring->dma, GFP_KERNEL);
6484         if (!tx_ring->desc)
6485                 goto err;
6486
6487         tx_ring->next_to_use = 0;
6488         tx_ring->next_to_clean = 0;
6489         return 0;
6490
6491 err:
6492         vfree(tx_ring->tx_buffer_info);
6493         tx_ring->tx_buffer_info = NULL;
6494         dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n");
6495         return -ENOMEM;
6496 }
6497
6498 /**
6499  * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
6500  * @adapter: board private structure
6501  *
6502  * If this function returns with an error, then it's possible one or
6503  * more of the rings is populated (while the rest are not).  It is the
6504  * callers duty to clean those orphaned rings.
6505  *
6506  * Return 0 on success, negative on failure
6507  **/
6508 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
6509 {
6510         int i, j = 0, err = 0;
6511
6512         for (i = 0; i < adapter->num_tx_queues; i++) {
6513                 err = ixgbe_setup_tx_resources(adapter->tx_ring[i]);
6514                 if (!err)
6515                         continue;
6516
6517                 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
6518                 goto err_setup_tx;
6519         }
6520         for (j = 0; j < adapter->num_xdp_queues; j++) {
6521                 err = ixgbe_setup_tx_resources(adapter->xdp_ring[j]);
6522                 if (!err)
6523                         continue;
6524
6525                 e_err(probe, "Allocation for Tx Queue %u failed\n", j);
6526                 goto err_setup_tx;
6527         }
6528
6529         return 0;
6530 err_setup_tx:
6531         /* rewind the index freeing the rings as we go */
6532         while (j--)
6533                 ixgbe_free_tx_resources(adapter->xdp_ring[j]);
6534         while (i--)
6535                 ixgbe_free_tx_resources(adapter->tx_ring[i]);
6536         return err;
6537 }
6538
6539 static int ixgbe_rx_napi_id(struct ixgbe_ring *rx_ring)
6540 {
6541         struct ixgbe_q_vector *q_vector = rx_ring->q_vector;
6542
6543         return q_vector ? q_vector->napi.napi_id : 0;
6544 }
6545
6546 /**
6547  * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
6548  * @adapter: pointer to ixgbe_adapter
6549  * @rx_ring:    rx descriptor ring (for a specific queue) to setup
6550  *
6551  * Returns 0 on success, negative on failure
6552  **/
6553 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
6554                              struct ixgbe_ring *rx_ring)
6555 {
6556         struct device *dev = rx_ring->dev;
6557         int orig_node = dev_to_node(dev);
6558         int ring_node = NUMA_NO_NODE;
6559         int size;
6560
6561         size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
6562
6563         if (rx_ring->q_vector)
6564                 ring_node = rx_ring->q_vector->numa_node;
6565
6566         rx_ring->rx_buffer_info = vmalloc_node(size, ring_node);
6567         if (!rx_ring->rx_buffer_info)
6568                 rx_ring->rx_buffer_info = vmalloc(size);
6569         if (!rx_ring->rx_buffer_info)
6570                 goto err;
6571
6572         /* Round up to nearest 4K */
6573         rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
6574         rx_ring->size = ALIGN(rx_ring->size, 4096);
6575
6576         set_dev_node(dev, ring_node);
6577         rx_ring->desc = dma_alloc_coherent(dev,
6578                                            rx_ring->size,
6579                                            &rx_ring->dma,
6580                                            GFP_KERNEL);
6581         set_dev_node(dev, orig_node);
6582         if (!rx_ring->desc)
6583                 rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
6584                                                    &rx_ring->dma, GFP_KERNEL);
6585         if (!rx_ring->desc)
6586                 goto err;
6587
6588         rx_ring->next_to_clean = 0;
6589         rx_ring->next_to_use = 0;
6590
6591         /* XDP RX-queue info */
6592         if (xdp_rxq_info_reg(&rx_ring->xdp_rxq, adapter->netdev,
6593                              rx_ring->queue_index, ixgbe_rx_napi_id(rx_ring)) < 0)
6594                 goto err;
6595
6596         rx_ring->xdp_prog = adapter->xdp_prog;
6597
6598         return 0;
6599 err:
6600         vfree(rx_ring->rx_buffer_info);
6601         rx_ring->rx_buffer_info = NULL;
6602         dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n");
6603         return -ENOMEM;
6604 }
6605
6606 /**
6607  * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
6608  * @adapter: board private structure
6609  *
6610  * If this function returns with an error, then it's possible one or
6611  * more of the rings is populated (while the rest are not).  It is the
6612  * callers duty to clean those orphaned rings.
6613  *
6614  * Return 0 on success, negative on failure
6615  **/
6616 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
6617 {
6618         int i, err = 0;
6619
6620         for (i = 0; i < adapter->num_rx_queues; i++) {
6621                 err = ixgbe_setup_rx_resources(adapter, adapter->rx_ring[i]);
6622                 if (!err)
6623                         continue;
6624
6625                 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
6626                 goto err_setup_rx;
6627         }
6628
6629 #ifdef IXGBE_FCOE
6630         err = ixgbe_setup_fcoe_ddp_resources(adapter);
6631         if (!err)
6632 #endif
6633                 return 0;
6634 err_setup_rx:
6635         /* rewind the index freeing the rings as we go */
6636         while (i--)
6637                 ixgbe_free_rx_resources(adapter->rx_ring[i]);
6638         return err;
6639 }
6640
6641 /**
6642  * ixgbe_free_tx_resources - Free Tx Resources per Queue
6643  * @tx_ring: Tx descriptor ring for a specific queue
6644  *
6645  * Free all transmit software resources
6646  **/
6647 void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring)
6648 {
6649         ixgbe_clean_tx_ring(tx_ring);
6650
6651         vfree(tx_ring->tx_buffer_info);
6652         tx_ring->tx_buffer_info = NULL;
6653
6654         /* if not set, then don't free */
6655         if (!tx_ring->desc)
6656                 return;
6657
6658         dma_free_coherent(tx_ring->dev, tx_ring->size,
6659                           tx_ring->desc, tx_ring->dma);
6660
6661         tx_ring->desc = NULL;
6662 }
6663
6664 /**
6665  * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
6666  * @adapter: board private structure
6667  *
6668  * Free all transmit software resources
6669  **/
6670 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
6671 {
6672         int i;
6673
6674         for (i = 0; i < adapter->num_tx_queues; i++)
6675                 if (adapter->tx_ring[i]->desc)
6676                         ixgbe_free_tx_resources(adapter->tx_ring[i]);
6677         for (i = 0; i < adapter->num_xdp_queues; i++)
6678                 if (adapter->xdp_ring[i]->desc)
6679                         ixgbe_free_tx_resources(adapter->xdp_ring[i]);
6680 }
6681
6682 /**
6683  * ixgbe_free_rx_resources - Free Rx Resources
6684  * @rx_ring: ring to clean the resources from
6685  *
6686  * Free all receive software resources
6687  **/
6688 void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring)
6689 {
6690         ixgbe_clean_rx_ring(rx_ring);
6691
6692         rx_ring->xdp_prog = NULL;
6693         xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
6694         vfree(rx_ring->rx_buffer_info);
6695         rx_ring->rx_buffer_info = NULL;
6696
6697         /* if not set, then don't free */
6698         if (!rx_ring->desc)
6699                 return;
6700
6701         dma_free_coherent(rx_ring->dev, rx_ring->size,
6702                           rx_ring->desc, rx_ring->dma);
6703
6704         rx_ring->desc = NULL;
6705 }
6706
6707 /**
6708  * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
6709  * @adapter: board private structure
6710  *
6711  * Free all receive software resources
6712  **/
6713 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
6714 {
6715         int i;
6716
6717 #ifdef IXGBE_FCOE
6718         ixgbe_free_fcoe_ddp_resources(adapter);
6719
6720 #endif
6721         for (i = 0; i < adapter->num_rx_queues; i++)
6722                 if (adapter->rx_ring[i]->desc)
6723                         ixgbe_free_rx_resources(adapter->rx_ring[i]);
6724 }
6725
6726 /**
6727  * ixgbe_change_mtu - Change the Maximum Transfer Unit
6728  * @netdev: network interface device structure
6729  * @new_mtu: new value for maximum frame size
6730  *
6731  * Returns 0 on success, negative on failure
6732  **/
6733 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
6734 {
6735         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6736
6737         if (adapter->xdp_prog) {
6738                 int new_frame_size = new_mtu + ETH_HLEN + ETH_FCS_LEN +
6739                                      VLAN_HLEN;
6740                 int i;
6741
6742                 for (i = 0; i < adapter->num_rx_queues; i++) {
6743                         struct ixgbe_ring *ring = adapter->rx_ring[i];
6744
6745                         if (new_frame_size > ixgbe_rx_bufsz(ring)) {
6746                                 e_warn(probe, "Requested MTU size is not supported with XDP\n");
6747                                 return -EINVAL;
6748                         }
6749                 }
6750         }
6751
6752         /*
6753          * For 82599EB we cannot allow legacy VFs to enable their receive
6754          * paths when MTU greater than 1500 is configured.  So display a
6755          * warning that legacy VFs will be disabled.
6756          */
6757         if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) &&
6758             (adapter->hw.mac.type == ixgbe_mac_82599EB) &&
6759             (new_mtu > ETH_DATA_LEN))
6760                 e_warn(probe, "Setting MTU > 1500 will disable legacy VFs\n");
6761
6762         netdev_dbg(netdev, "changing MTU from %d to %d\n",
6763                    netdev->mtu, new_mtu);
6764
6765         /* must set new MTU before calling down or up */
6766         netdev->mtu = new_mtu;
6767
6768         if (netif_running(netdev))
6769                 ixgbe_reinit_locked(adapter);
6770
6771         return 0;
6772 }
6773
6774 /**
6775  * ixgbe_open - Called when a network interface is made active
6776  * @netdev: network interface device structure
6777  *
6778  * Returns 0 on success, negative value on failure
6779  *
6780  * The open entry point is called when a network interface is made
6781  * active by the system (IFF_UP).  At this point all resources needed
6782  * for transmit and receive operations are allocated, the interrupt
6783  * handler is registered with the OS, the watchdog timer is started,
6784  * and the stack is notified that the interface is ready.
6785  **/
6786 int ixgbe_open(struct net_device *netdev)
6787 {
6788         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6789         struct ixgbe_hw *hw = &adapter->hw;
6790         int err, queues;
6791
6792         /* disallow open during test */
6793         if (test_bit(__IXGBE_TESTING, &adapter->state))
6794                 return -EBUSY;
6795
6796         netif_carrier_off(netdev);
6797
6798         /* allocate transmit descriptors */
6799         err = ixgbe_setup_all_tx_resources(adapter);
6800         if (err)
6801                 goto err_setup_tx;
6802
6803         /* allocate receive descriptors */
6804         err = ixgbe_setup_all_rx_resources(adapter);
6805         if (err)
6806                 goto err_setup_rx;
6807
6808         ixgbe_configure(adapter);
6809
6810         err = ixgbe_request_irq(adapter);
6811         if (err)
6812                 goto err_req_irq;
6813
6814         /* Notify the stack of the actual queue counts. */
6815         queues = adapter->num_tx_queues;
6816         err = netif_set_real_num_tx_queues(netdev, queues);
6817         if (err)
6818                 goto err_set_queues;
6819
6820         queues = adapter->num_rx_queues;
6821         err = netif_set_real_num_rx_queues(netdev, queues);
6822         if (err)
6823                 goto err_set_queues;
6824
6825         ixgbe_ptp_init(adapter);
6826
6827         ixgbe_up_complete(adapter);
6828
6829         udp_tunnel_nic_reset_ntf(netdev);
6830
6831         return 0;
6832
6833 err_set_queues:
6834         ixgbe_free_irq(adapter);
6835 err_req_irq:
6836         ixgbe_free_all_rx_resources(adapter);
6837         if (hw->phy.ops.set_phy_power && !adapter->wol)
6838                 hw->phy.ops.set_phy_power(&adapter->hw, false);
6839 err_setup_rx:
6840         ixgbe_free_all_tx_resources(adapter);
6841 err_setup_tx:
6842         ixgbe_reset(adapter);
6843
6844         return err;
6845 }
6846
6847 static void ixgbe_close_suspend(struct ixgbe_adapter *adapter)
6848 {
6849         ixgbe_ptp_suspend(adapter);
6850
6851         if (adapter->hw.phy.ops.enter_lplu) {
6852                 adapter->hw.phy.reset_disable = true;
6853                 ixgbe_down(adapter);
6854                 adapter->hw.phy.ops.enter_lplu(&adapter->hw);
6855                 adapter->hw.phy.reset_disable = false;
6856         } else {
6857                 ixgbe_down(adapter);
6858         }
6859
6860         ixgbe_free_irq(adapter);
6861
6862         ixgbe_free_all_tx_resources(adapter);
6863         ixgbe_free_all_rx_resources(adapter);
6864 }
6865
6866 /**
6867  * ixgbe_close - Disables a network interface
6868  * @netdev: network interface device structure
6869  *
6870  * Returns 0, this is not allowed to fail
6871  *
6872  * The close entry point is called when an interface is de-activated
6873  * by the OS.  The hardware is still under the drivers control, but
6874  * needs to be disabled.  A global MAC reset is issued to stop the
6875  * hardware, and all transmit and receive resources are freed.
6876  **/
6877 int ixgbe_close(struct net_device *netdev)
6878 {
6879         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6880
6881         ixgbe_ptp_stop(adapter);
6882
6883         if (netif_device_present(netdev))
6884                 ixgbe_close_suspend(adapter);
6885
6886         ixgbe_fdir_filter_exit(adapter);
6887
6888         ixgbe_release_hw_control(adapter);
6889
6890         return 0;
6891 }
6892
6893 static int __maybe_unused ixgbe_resume(struct device *dev_d)
6894 {
6895         struct pci_dev *pdev = to_pci_dev(dev_d);
6896         struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
6897         struct net_device *netdev = adapter->netdev;
6898         u32 err;
6899
6900         adapter->hw.hw_addr = adapter->io_addr;
6901
6902         err = pci_enable_device_mem(pdev);
6903         if (err) {
6904                 e_dev_err("Cannot enable PCI device from suspend\n");
6905                 return err;
6906         }
6907         smp_mb__before_atomic();
6908         clear_bit(__IXGBE_DISABLED, &adapter->state);
6909         pci_set_master(pdev);
6910
6911         device_wakeup_disable(dev_d);
6912
6913         ixgbe_reset(adapter);
6914
6915         IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
6916
6917         rtnl_lock();
6918         err = ixgbe_init_interrupt_scheme(adapter);
6919         if (!err && netif_running(netdev))
6920                 err = ixgbe_open(netdev);
6921
6922
6923         if (!err)
6924                 netif_device_attach(netdev);
6925         rtnl_unlock();
6926
6927         return err;
6928 }
6929
6930 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
6931 {
6932         struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
6933         struct net_device *netdev = adapter->netdev;
6934         struct ixgbe_hw *hw = &adapter->hw;
6935         u32 ctrl;
6936         u32 wufc = adapter->wol;
6937
6938         rtnl_lock();
6939         netif_device_detach(netdev);
6940
6941         if (netif_running(netdev))
6942                 ixgbe_close_suspend(adapter);
6943
6944         ixgbe_clear_interrupt_scheme(adapter);
6945         rtnl_unlock();
6946
6947         if (hw->mac.ops.stop_link_on_d3)
6948                 hw->mac.ops.stop_link_on_d3(hw);
6949
6950         if (wufc) {
6951                 u32 fctrl;
6952
6953                 ixgbe_set_rx_mode(netdev);
6954
6955                 /* enable the optics for 82599 SFP+ fiber as we can WoL */
6956                 if (hw->mac.ops.enable_tx_laser)
6957                         hw->mac.ops.enable_tx_laser(hw);
6958
6959                 /* enable the reception of multicast packets */
6960                 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
6961                 fctrl |= IXGBE_FCTRL_MPE;
6962                 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
6963
6964                 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
6965                 ctrl |= IXGBE_CTRL_GIO_DIS;
6966                 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
6967
6968                 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
6969         } else {
6970                 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
6971                 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
6972         }
6973
6974         switch (hw->mac.type) {
6975         case ixgbe_mac_82598EB:
6976                 pci_wake_from_d3(pdev, false);
6977                 break;
6978         case ixgbe_mac_82599EB:
6979         case ixgbe_mac_X540:
6980         case ixgbe_mac_X550:
6981         case ixgbe_mac_X550EM_x:
6982         case ixgbe_mac_x550em_a:
6983                 pci_wake_from_d3(pdev, !!wufc);
6984                 break;
6985         default:
6986                 break;
6987         }
6988
6989         *enable_wake = !!wufc;
6990         if (hw->phy.ops.set_phy_power && !*enable_wake)
6991                 hw->phy.ops.set_phy_power(hw, false);
6992
6993         ixgbe_release_hw_control(adapter);
6994
6995         if (!test_and_set_bit(__IXGBE_DISABLED, &adapter->state))
6996                 pci_disable_device(pdev);
6997
6998         return 0;
6999 }
7000
7001 static int __maybe_unused ixgbe_suspend(struct device *dev_d)
7002 {
7003         struct pci_dev *pdev = to_pci_dev(dev_d);
7004         int retval;
7005         bool wake;
7006
7007         retval = __ixgbe_shutdown(pdev, &wake);
7008
7009         device_set_wakeup_enable(dev_d, wake);
7010
7011         return retval;
7012 }
7013
7014 static void ixgbe_shutdown(struct pci_dev *pdev)
7015 {
7016         bool wake;
7017
7018         __ixgbe_shutdown(pdev, &wake);
7019
7020         if (system_state == SYSTEM_POWER_OFF) {
7021                 pci_wake_from_d3(pdev, wake);
7022                 pci_set_power_state(pdev, PCI_D3hot);
7023         }
7024 }
7025
7026 /**
7027  * ixgbe_update_stats - Update the board statistics counters.
7028  * @adapter: board private structure
7029  **/
7030 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
7031 {
7032         struct net_device *netdev = adapter->netdev;
7033         struct ixgbe_hw *hw = &adapter->hw;
7034         struct ixgbe_hw_stats *hwstats = &adapter->stats;
7035         u64 total_mpc = 0;
7036         u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
7037         u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0;
7038         u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
7039         u64 alloc_rx_page = 0;
7040         u64 bytes = 0, packets = 0, hw_csum_rx_error = 0;
7041
7042         if (test_bit(__IXGBE_DOWN, &adapter->state) ||
7043             test_bit(__IXGBE_RESETTING, &adapter->state))
7044                 return;
7045
7046         if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
7047                 u64 rsc_count = 0;
7048                 u64 rsc_flush = 0;
7049                 for (i = 0; i < adapter->num_rx_queues; i++) {
7050                         rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count;
7051                         rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush;
7052                 }
7053                 adapter->rsc_total_count = rsc_count;
7054                 adapter->rsc_total_flush = rsc_flush;
7055         }
7056
7057         for (i = 0; i < adapter->num_rx_queues; i++) {
7058                 struct ixgbe_ring *rx_ring = READ_ONCE(adapter->rx_ring[i]);
7059
7060                 if (!rx_ring)
7061                         continue;
7062                 non_eop_descs += rx_ring->rx_stats.non_eop_descs;
7063                 alloc_rx_page += rx_ring->rx_stats.alloc_rx_page;
7064                 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
7065                 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
7066                 hw_csum_rx_error += rx_ring->rx_stats.csum_err;
7067                 bytes += rx_ring->stats.bytes;
7068                 packets += rx_ring->stats.packets;
7069         }
7070         adapter->non_eop_descs = non_eop_descs;
7071         adapter->alloc_rx_page = alloc_rx_page;
7072         adapter->alloc_rx_page_failed = alloc_rx_page_failed;
7073         adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
7074         adapter->hw_csum_rx_error = hw_csum_rx_error;
7075         netdev->stats.rx_bytes = bytes;
7076         netdev->stats.rx_packets = packets;
7077
7078         bytes = 0;
7079         packets = 0;
7080         /* gather some stats to the adapter struct that are per queue */
7081         for (i = 0; i < adapter->num_tx_queues; i++) {
7082                 struct ixgbe_ring *tx_ring = READ_ONCE(adapter->tx_ring[i]);
7083
7084                 if (!tx_ring)
7085                         continue;
7086                 restart_queue += tx_ring->tx_stats.restart_queue;
7087                 tx_busy += tx_ring->tx_stats.tx_busy;
7088                 bytes += tx_ring->stats.bytes;
7089                 packets += tx_ring->stats.packets;
7090         }
7091         for (i = 0; i < adapter->num_xdp_queues; i++) {
7092                 struct ixgbe_ring *xdp_ring = READ_ONCE(adapter->xdp_ring[i]);
7093
7094                 if (!xdp_ring)
7095                         continue;
7096                 restart_queue += xdp_ring->tx_stats.restart_queue;
7097                 tx_busy += xdp_ring->tx_stats.tx_busy;
7098                 bytes += xdp_ring->stats.bytes;
7099                 packets += xdp_ring->stats.packets;
7100         }
7101         adapter->restart_queue = restart_queue;
7102         adapter->tx_busy = tx_busy;
7103         netdev->stats.tx_bytes = bytes;
7104         netdev->stats.tx_packets = packets;
7105
7106         hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
7107
7108         /* 8 register reads */
7109         for (i = 0; i < 8; i++) {
7110                 /* for packet buffers not used, the register should read 0 */
7111                 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
7112                 missed_rx += mpc;
7113                 hwstats->mpc[i] += mpc;
7114                 total_mpc += hwstats->mpc[i];
7115                 hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
7116                 hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
7117                 switch (hw->mac.type) {
7118                 case ixgbe_mac_82598EB:
7119                         hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
7120                         hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
7121                         hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
7122                         hwstats->pxonrxc[i] +=
7123                                 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
7124                         break;
7125                 case ixgbe_mac_82599EB:
7126                 case ixgbe_mac_X540:
7127                 case ixgbe_mac_X550:
7128                 case ixgbe_mac_X550EM_x:
7129                 case ixgbe_mac_x550em_a:
7130                         hwstats->pxonrxc[i] +=
7131                                 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
7132                         break;
7133                 default:
7134                         break;
7135                 }
7136         }
7137
7138         /*16 register reads */
7139         for (i = 0; i < 16; i++) {
7140                 hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
7141                 hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
7142                 if ((hw->mac.type == ixgbe_mac_82599EB) ||
7143                     (hw->mac.type == ixgbe_mac_X540) ||
7144                     (hw->mac.type == ixgbe_mac_X550) ||
7145                     (hw->mac.type == ixgbe_mac_X550EM_x) ||
7146                     (hw->mac.type == ixgbe_mac_x550em_a)) {
7147                         hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC_L(i));
7148                         IXGBE_READ_REG(hw, IXGBE_QBTC_H(i)); /* to clear */
7149                         hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC_L(i));
7150                         IXGBE_READ_REG(hw, IXGBE_QBRC_H(i)); /* to clear */
7151                 }
7152         }
7153
7154         hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
7155         /* work around hardware counting issue */
7156         hwstats->gprc -= missed_rx;
7157
7158         ixgbe_update_xoff_received(adapter);
7159
7160         /* 82598 hardware only has a 32 bit counter in the high register */
7161         switch (hw->mac.type) {
7162         case ixgbe_mac_82598EB:
7163                 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
7164                 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
7165                 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
7166                 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
7167                 break;
7168         case ixgbe_mac_X540:
7169         case ixgbe_mac_X550:
7170         case ixgbe_mac_X550EM_x:
7171         case ixgbe_mac_x550em_a:
7172                 /* OS2BMC stats are X540 and later */
7173                 hwstats->o2bgptc += IXGBE_READ_REG(hw, IXGBE_O2BGPTC);
7174                 hwstats->o2bspc += IXGBE_READ_REG(hw, IXGBE_O2BSPC);
7175                 hwstats->b2ospc += IXGBE_READ_REG(hw, IXGBE_B2OSPC);
7176                 hwstats->b2ogprc += IXGBE_READ_REG(hw, IXGBE_B2OGPRC);
7177                 fallthrough;
7178         case ixgbe_mac_82599EB:
7179                 for (i = 0; i < 16; i++)
7180                         adapter->hw_rx_no_dma_resources +=
7181                                              IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
7182                 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
7183                 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
7184                 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
7185                 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
7186                 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
7187                 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
7188                 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
7189                 hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
7190                 hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
7191 #ifdef IXGBE_FCOE
7192                 hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
7193                 hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
7194                 hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
7195                 hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
7196                 hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
7197                 hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
7198                 /* Add up per cpu counters for total ddp aloc fail */
7199                 if (adapter->fcoe.ddp_pool) {
7200                         struct ixgbe_fcoe *fcoe = &adapter->fcoe;
7201                         struct ixgbe_fcoe_ddp_pool *ddp_pool;
7202                         unsigned int cpu;
7203                         u64 noddp = 0, noddp_ext_buff = 0;
7204                         for_each_possible_cpu(cpu) {
7205                                 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
7206                                 noddp += ddp_pool->noddp;
7207                                 noddp_ext_buff += ddp_pool->noddp_ext_buff;
7208                         }
7209                         hwstats->fcoe_noddp = noddp;
7210                         hwstats->fcoe_noddp_ext_buff = noddp_ext_buff;
7211                 }
7212 #endif /* IXGBE_FCOE */
7213                 break;
7214         default:
7215                 break;
7216         }
7217         bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
7218         hwstats->bprc += bprc;
7219         hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
7220         if (hw->mac.type == ixgbe_mac_82598EB)
7221                 hwstats->mprc -= bprc;
7222         hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
7223         hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
7224         hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
7225         hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
7226         hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
7227         hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
7228         hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
7229         hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
7230         lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
7231         hwstats->lxontxc += lxon;
7232         lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
7233         hwstats->lxofftxc += lxoff;
7234         hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
7235         hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
7236         /*
7237          * 82598 errata - tx of flow control packets is included in tx counters
7238          */
7239         xon_off_tot = lxon + lxoff;
7240         hwstats->gptc -= xon_off_tot;
7241         hwstats->mptc -= xon_off_tot;
7242         hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
7243         hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
7244         hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
7245         hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
7246         hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
7247         hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
7248         hwstats->ptc64 -= xon_off_tot;
7249         hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
7250         hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
7251         hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
7252         hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
7253         hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
7254         hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
7255
7256         /* Fill out the OS statistics structure */
7257         netdev->stats.multicast = hwstats->mprc;
7258
7259         /* Rx Errors */
7260         netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec;
7261         netdev->stats.rx_dropped = 0;
7262         netdev->stats.rx_length_errors = hwstats->rlec;
7263         netdev->stats.rx_crc_errors = hwstats->crcerrs;
7264         netdev->stats.rx_missed_errors = total_mpc;
7265 }
7266
7267 /**
7268  * ixgbe_fdir_reinit_subtask - worker thread to reinit FDIR filter table
7269  * @adapter: pointer to the device adapter structure
7270  **/
7271 static void ixgbe_fdir_reinit_subtask(struct ixgbe_adapter *adapter)
7272 {
7273         struct ixgbe_hw *hw = &adapter->hw;
7274         int i;
7275
7276         if (!(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
7277                 return;
7278
7279         adapter->flags2 &= ~IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
7280
7281         /* if interface is down do nothing */
7282         if (test_bit(__IXGBE_DOWN, &adapter->state))
7283                 return;
7284
7285         /* do nothing if we are not using signature filters */
7286         if (!(adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE))
7287                 return;
7288
7289         adapter->fdir_overflow++;
7290
7291         if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
7292                 for (i = 0; i < adapter->num_tx_queues; i++)
7293                         set_bit(__IXGBE_TX_FDIR_INIT_DONE,
7294                                 &(adapter->tx_ring[i]->state));
7295                 for (i = 0; i < adapter->num_xdp_queues; i++)
7296                         set_bit(__IXGBE_TX_FDIR_INIT_DONE,
7297                                 &adapter->xdp_ring[i]->state);
7298                 /* re-enable flow director interrupts */
7299                 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
7300         } else {
7301                 e_err(probe, "failed to finish FDIR re-initialization, "
7302                       "ignored adding FDIR ATR filters\n");
7303         }
7304 }
7305
7306 /**
7307  * ixgbe_check_hang_subtask - check for hung queues and dropped interrupts
7308  * @adapter: pointer to the device adapter structure
7309  *
7310  * This function serves two purposes.  First it strobes the interrupt lines
7311  * in order to make certain interrupts are occurring.  Secondly it sets the
7312  * bits needed to check for TX hangs.  As a result we should immediately
7313  * determine if a hang has occurred.
7314  */
7315 static void ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter)
7316 {
7317         struct ixgbe_hw *hw = &adapter->hw;
7318         u64 eics = 0;
7319         int i;
7320
7321         /* If we're down, removing or resetting, just bail */
7322         if (test_bit(__IXGBE_DOWN, &adapter->state) ||
7323             test_bit(__IXGBE_REMOVING, &adapter->state) ||
7324             test_bit(__IXGBE_RESETTING, &adapter->state))
7325                 return;
7326
7327         /* Force detection of hung controller */
7328         if (netif_carrier_ok(adapter->netdev)) {
7329                 for (i = 0; i < adapter->num_tx_queues; i++)
7330                         set_check_for_tx_hang(adapter->tx_ring[i]);
7331                 for (i = 0; i < adapter->num_xdp_queues; i++)
7332                         set_check_for_tx_hang(adapter->xdp_ring[i]);
7333         }
7334
7335         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
7336                 /*
7337                  * for legacy and MSI interrupts don't set any bits
7338                  * that are enabled for EIAM, because this operation
7339                  * would set *both* EIMS and EICS for any bit in EIAM
7340                  */
7341                 IXGBE_WRITE_REG(hw, IXGBE_EICS,
7342                         (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
7343         } else {
7344                 /* get one bit for every active tx/rx interrupt vector */
7345                 for (i = 0; i < adapter->num_q_vectors; i++) {
7346                         struct ixgbe_q_vector *qv = adapter->q_vector[i];
7347                         if (qv->rx.ring || qv->tx.ring)
7348                                 eics |= BIT_ULL(i);
7349                 }
7350         }
7351
7352         /* Cause software interrupt to ensure rings are cleaned */
7353         ixgbe_irq_rearm_queues(adapter, eics);
7354 }
7355
7356 /**
7357  * ixgbe_watchdog_update_link - update the link status
7358  * @adapter: pointer to the device adapter structure
7359  **/
7360 static void ixgbe_watchdog_update_link(struct ixgbe_adapter *adapter)
7361 {
7362         struct ixgbe_hw *hw = &adapter->hw;
7363         u32 link_speed = adapter->link_speed;
7364         bool link_up = adapter->link_up;
7365         bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
7366
7367         if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE))
7368                 return;
7369
7370         if (hw->mac.ops.check_link) {
7371                 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
7372         } else {
7373                 /* always assume link is up, if no check link function */
7374                 link_speed = IXGBE_LINK_SPEED_10GB_FULL;
7375                 link_up = true;
7376         }
7377
7378         if (adapter->ixgbe_ieee_pfc)
7379                 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
7380
7381         if (link_up && !((adapter->flags & IXGBE_FLAG_DCB_ENABLED) && pfc_en)) {
7382                 hw->mac.ops.fc_enable(hw);
7383                 ixgbe_set_rx_drop_en(adapter);
7384         }
7385
7386         if (link_up ||
7387             time_after(jiffies, (adapter->link_check_timeout +
7388                                  IXGBE_TRY_LINK_TIMEOUT))) {
7389                 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
7390                 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
7391                 IXGBE_WRITE_FLUSH(hw);
7392         }
7393
7394         adapter->link_up = link_up;
7395         adapter->link_speed = link_speed;
7396 }
7397
7398 static void ixgbe_update_default_up(struct ixgbe_adapter *adapter)
7399 {
7400 #ifdef CONFIG_IXGBE_DCB
7401         struct net_device *netdev = adapter->netdev;
7402         struct dcb_app app = {
7403                               .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE,
7404                               .protocol = 0,
7405                              };
7406         u8 up = 0;
7407
7408         if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE)
7409                 up = dcb_ieee_getapp_mask(netdev, &app);
7410
7411         adapter->default_up = (up > 1) ? (ffs(up) - 1) : 0;
7412 #endif
7413 }
7414
7415 /**
7416  * ixgbe_watchdog_link_is_up - update netif_carrier status and
7417  *                             print link up message
7418  * @adapter: pointer to the device adapter structure
7419  **/
7420 static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter)
7421 {
7422         struct net_device *netdev = adapter->netdev;
7423         struct ixgbe_hw *hw = &adapter->hw;
7424         u32 link_speed = adapter->link_speed;
7425         const char *speed_str;
7426         bool flow_rx, flow_tx;
7427
7428         /* only continue if link was previously down */
7429         if (netif_carrier_ok(netdev))
7430                 return;
7431
7432         adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
7433
7434         switch (hw->mac.type) {
7435         case ixgbe_mac_82598EB: {
7436                 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
7437                 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
7438                 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
7439                 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
7440         }
7441                 break;
7442         case ixgbe_mac_X540:
7443         case ixgbe_mac_X550:
7444         case ixgbe_mac_X550EM_x:
7445         case ixgbe_mac_x550em_a:
7446         case ixgbe_mac_82599EB: {
7447                 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
7448                 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
7449                 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
7450                 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
7451         }
7452                 break;
7453         default:
7454                 flow_tx = false;
7455                 flow_rx = false;
7456                 break;
7457         }
7458
7459         adapter->last_rx_ptp_check = jiffies;
7460
7461         if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
7462                 ixgbe_ptp_start_cyclecounter(adapter);
7463
7464         switch (link_speed) {
7465         case IXGBE_LINK_SPEED_10GB_FULL:
7466                 speed_str = "10 Gbps";
7467                 break;
7468         case IXGBE_LINK_SPEED_5GB_FULL:
7469                 speed_str = "5 Gbps";
7470                 break;
7471         case IXGBE_LINK_SPEED_2_5GB_FULL:
7472                 speed_str = "2.5 Gbps";
7473                 break;
7474         case IXGBE_LINK_SPEED_1GB_FULL:
7475                 speed_str = "1 Gbps";
7476                 break;
7477         case IXGBE_LINK_SPEED_100_FULL:
7478                 speed_str = "100 Mbps";
7479                 break;
7480         case IXGBE_LINK_SPEED_10_FULL:
7481                 speed_str = "10 Mbps";
7482                 break;
7483         default:
7484                 speed_str = "unknown speed";
7485                 break;
7486         }
7487         e_info(drv, "NIC Link is Up %s, Flow Control: %s\n", speed_str,
7488                ((flow_rx && flow_tx) ? "RX/TX" :
7489                (flow_rx ? "RX" :
7490                (flow_tx ? "TX" : "None"))));
7491
7492         netif_carrier_on(netdev);
7493         ixgbe_check_vf_rate_limit(adapter);
7494
7495         /* enable transmits */
7496         netif_tx_wake_all_queues(adapter->netdev);
7497
7498         /* update the default user priority for VFs */
7499         ixgbe_update_default_up(adapter);
7500
7501         /* ping all the active vfs to let them know link has changed */
7502         ixgbe_ping_all_vfs(adapter);
7503 }
7504
7505 /**
7506  * ixgbe_watchdog_link_is_down - update netif_carrier status and
7507  *                               print link down message
7508  * @adapter: pointer to the adapter structure
7509  **/
7510 static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter *adapter)
7511 {
7512         struct net_device *netdev = adapter->netdev;
7513         struct ixgbe_hw *hw = &adapter->hw;
7514
7515         adapter->link_up = false;
7516         adapter->link_speed = 0;
7517
7518         /* only continue if link was up previously */
7519         if (!netif_carrier_ok(netdev))
7520                 return;
7521
7522         /* poll for SFP+ cable when link is down */
7523         if (ixgbe_is_sfp(hw) && hw->mac.type == ixgbe_mac_82598EB)
7524                 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
7525
7526         if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
7527                 ixgbe_ptp_start_cyclecounter(adapter);
7528
7529         e_info(drv, "NIC Link is Down\n");
7530         netif_carrier_off(netdev);
7531
7532         /* ping all the active vfs to let them know link has changed */
7533         ixgbe_ping_all_vfs(adapter);
7534 }
7535
7536 static bool ixgbe_ring_tx_pending(struct ixgbe_adapter *adapter)
7537 {
7538         int i;
7539
7540         for (i = 0; i < adapter->num_tx_queues; i++) {
7541                 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
7542
7543                 if (tx_ring->next_to_use != tx_ring->next_to_clean)
7544                         return true;
7545         }
7546
7547         for (i = 0; i < adapter->num_xdp_queues; i++) {
7548                 struct ixgbe_ring *ring = adapter->xdp_ring[i];
7549
7550                 if (ring->next_to_use != ring->next_to_clean)
7551                         return true;
7552         }
7553
7554         return false;
7555 }
7556
7557 static bool ixgbe_vf_tx_pending(struct ixgbe_adapter *adapter)
7558 {
7559         struct ixgbe_hw *hw = &adapter->hw;
7560         struct ixgbe_ring_feature *vmdq = &adapter->ring_feature[RING_F_VMDQ];
7561         u32 q_per_pool = __ALIGN_MASK(1, ~vmdq->mask);
7562
7563         int i, j;
7564
7565         if (!adapter->num_vfs)
7566                 return false;
7567
7568         /* resetting the PF is only needed for MAC before X550 */
7569         if (hw->mac.type >= ixgbe_mac_X550)
7570                 return false;
7571
7572         for (i = 0; i < adapter->num_vfs; i++) {
7573                 for (j = 0; j < q_per_pool; j++) {
7574                         u32 h, t;
7575
7576                         h = IXGBE_READ_REG(hw, IXGBE_PVFTDHN(q_per_pool, i, j));
7577                         t = IXGBE_READ_REG(hw, IXGBE_PVFTDTN(q_per_pool, i, j));
7578
7579                         if (h != t)
7580                                 return true;
7581                 }
7582         }
7583
7584         return false;
7585 }
7586
7587 /**
7588  * ixgbe_watchdog_flush_tx - flush queues on link down
7589  * @adapter: pointer to the device adapter structure
7590  **/
7591 static void ixgbe_watchdog_flush_tx(struct ixgbe_adapter *adapter)
7592 {
7593         if (!netif_carrier_ok(adapter->netdev)) {
7594                 if (ixgbe_ring_tx_pending(adapter) ||
7595                     ixgbe_vf_tx_pending(adapter)) {
7596                         /* We've lost link, so the controller stops DMA,
7597                          * but we've got queued Tx work that's never going
7598                          * to get done, so reset controller to flush Tx.
7599                          * (Do the reset outside of interrupt context).
7600                          */
7601                         e_warn(drv, "initiating reset to clear Tx work after link loss\n");
7602                         set_bit(__IXGBE_RESET_REQUESTED, &adapter->state);
7603                 }
7604         }
7605 }
7606
7607 #ifdef CONFIG_PCI_IOV
7608 static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter)
7609 {
7610         struct ixgbe_hw *hw = &adapter->hw;
7611         struct pci_dev *pdev = adapter->pdev;
7612         unsigned int vf;
7613         u32 gpc;
7614
7615         if (!(netif_carrier_ok(adapter->netdev)))
7616                 return;
7617
7618         gpc = IXGBE_READ_REG(hw, IXGBE_TXDGPC);
7619         if (gpc) /* If incrementing then no need for the check below */
7620                 return;
7621         /* Check to see if a bad DMA write target from an errant or
7622          * malicious VF has caused a PCIe error.  If so then we can
7623          * issue a VFLR to the offending VF(s) and then resume without
7624          * requesting a full slot reset.
7625          */
7626
7627         if (!pdev)
7628                 return;
7629
7630         /* check status reg for all VFs owned by this PF */
7631         for (vf = 0; vf < adapter->num_vfs; ++vf) {
7632                 struct pci_dev *vfdev = adapter->vfinfo[vf].vfdev;
7633                 u16 status_reg;
7634
7635                 if (!vfdev)
7636                         continue;
7637                 pci_read_config_word(vfdev, PCI_STATUS, &status_reg);
7638                 if (status_reg != IXGBE_FAILED_READ_CFG_WORD &&
7639                     status_reg & PCI_STATUS_REC_MASTER_ABORT)
7640                         pcie_flr(vfdev);
7641         }
7642 }
7643
7644 static void ixgbe_spoof_check(struct ixgbe_adapter *adapter)
7645 {
7646         u32 ssvpc;
7647
7648         /* Do not perform spoof check for 82598 or if not in IOV mode */
7649         if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
7650             adapter->num_vfs == 0)
7651                 return;
7652
7653         ssvpc = IXGBE_READ_REG(&adapter->hw, IXGBE_SSVPC);
7654
7655         /*
7656          * ssvpc register is cleared on read, if zero then no
7657          * spoofed packets in the last interval.
7658          */
7659         if (!ssvpc)
7660                 return;
7661
7662         e_warn(drv, "%u Spoofed packets detected\n", ssvpc);
7663 }
7664 #else
7665 static void ixgbe_spoof_check(struct ixgbe_adapter __always_unused *adapter)
7666 {
7667 }
7668
7669 static void
7670 ixgbe_check_for_bad_vf(struct ixgbe_adapter __always_unused *adapter)
7671 {
7672 }
7673 #endif /* CONFIG_PCI_IOV */
7674
7675
7676 /**
7677  * ixgbe_watchdog_subtask - check and bring link up
7678  * @adapter: pointer to the device adapter structure
7679  **/
7680 static void ixgbe_watchdog_subtask(struct ixgbe_adapter *adapter)
7681 {
7682         /* if interface is down, removing or resetting, do nothing */
7683         if (test_bit(__IXGBE_DOWN, &adapter->state) ||
7684             test_bit(__IXGBE_REMOVING, &adapter->state) ||
7685             test_bit(__IXGBE_RESETTING, &adapter->state))
7686                 return;
7687
7688         ixgbe_watchdog_update_link(adapter);
7689
7690         if (adapter->link_up)
7691                 ixgbe_watchdog_link_is_up(adapter);
7692         else
7693                 ixgbe_watchdog_link_is_down(adapter);
7694
7695         ixgbe_check_for_bad_vf(adapter);
7696         ixgbe_spoof_check(adapter);
7697         ixgbe_update_stats(adapter);
7698
7699         ixgbe_watchdog_flush_tx(adapter);
7700 }
7701
7702 /**
7703  * ixgbe_sfp_detection_subtask - poll for SFP+ cable
7704  * @adapter: the ixgbe adapter structure
7705  **/
7706 static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter)
7707 {
7708         struct ixgbe_hw *hw = &adapter->hw;
7709         s32 err;
7710
7711         /* not searching for SFP so there is nothing to do here */
7712         if (!(adapter->flags2 & IXGBE_FLAG2_SEARCH_FOR_SFP) &&
7713             !(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
7714                 return;
7715
7716         if (adapter->sfp_poll_time &&
7717             time_after(adapter->sfp_poll_time, jiffies))
7718                 return; /* If not yet time to poll for SFP */
7719
7720         /* someone else is in init, wait until next service event */
7721         if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
7722                 return;
7723
7724         adapter->sfp_poll_time = jiffies + IXGBE_SFP_POLL_JIFFIES - 1;
7725
7726         err = hw->phy.ops.identify_sfp(hw);
7727         if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
7728                 goto sfp_out;
7729
7730         if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
7731                 /* If no cable is present, then we need to reset
7732                  * the next time we find a good cable. */
7733                 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
7734         }
7735
7736         /* exit on error */
7737         if (err)
7738                 goto sfp_out;
7739
7740         /* exit if reset not needed */
7741         if (!(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
7742                 goto sfp_out;
7743
7744         adapter->flags2 &= ~IXGBE_FLAG2_SFP_NEEDS_RESET;
7745
7746         /*
7747          * A module may be identified correctly, but the EEPROM may not have
7748          * support for that module.  setup_sfp() will fail in that case, so
7749          * we should not allow that module to load.
7750          */
7751         if (hw->mac.type == ixgbe_mac_82598EB)
7752                 err = hw->phy.ops.reset(hw);
7753         else
7754                 err = hw->mac.ops.setup_sfp(hw);
7755
7756         if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
7757                 goto sfp_out;
7758
7759         adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
7760         e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
7761
7762 sfp_out:
7763         clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
7764
7765         if ((err == IXGBE_ERR_SFP_NOT_SUPPORTED) &&
7766             (adapter->netdev->reg_state == NETREG_REGISTERED)) {
7767                 e_dev_err("failed to initialize because an unsupported "
7768                           "SFP+ module type was detected.\n");
7769                 e_dev_err("Reload the driver after installing a "
7770                           "supported module.\n");
7771                 unregister_netdev(adapter->netdev);
7772         }
7773 }
7774
7775 /**
7776  * ixgbe_sfp_link_config_subtask - set up link SFP after module install
7777  * @adapter: the ixgbe adapter structure
7778  **/
7779 static void ixgbe_sfp_link_config_subtask(struct ixgbe_adapter *adapter)
7780 {
7781         struct ixgbe_hw *hw = &adapter->hw;
7782         u32 cap_speed;
7783         u32 speed;
7784         bool autoneg = false;
7785
7786         if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_CONFIG))
7787                 return;
7788
7789         /* someone else is in init, wait until next service event */
7790         if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
7791                 return;
7792
7793         adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
7794
7795         hw->mac.ops.get_link_capabilities(hw, &cap_speed, &autoneg);
7796
7797         /* advertise highest capable link speed */
7798         if (!autoneg && (cap_speed & IXGBE_LINK_SPEED_10GB_FULL))
7799                 speed = IXGBE_LINK_SPEED_10GB_FULL;
7800         else
7801                 speed = cap_speed & (IXGBE_LINK_SPEED_10GB_FULL |
7802                                      IXGBE_LINK_SPEED_1GB_FULL);
7803
7804         if (hw->mac.ops.setup_link)
7805                 hw->mac.ops.setup_link(hw, speed, true);
7806
7807         adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
7808         adapter->link_check_timeout = jiffies;
7809         clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
7810 }
7811
7812 /**
7813  * ixgbe_service_timer - Timer Call-back
7814  * @t: pointer to timer_list structure
7815  **/
7816 static void ixgbe_service_timer(struct timer_list *t)
7817 {
7818         struct ixgbe_adapter *adapter = from_timer(adapter, t, service_timer);
7819         unsigned long next_event_offset;
7820
7821         /* poll faster when waiting for link */
7822         if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
7823                 next_event_offset = HZ / 10;
7824         else
7825                 next_event_offset = HZ * 2;
7826
7827         /* Reset the timer */
7828         mod_timer(&adapter->service_timer, next_event_offset + jiffies);
7829
7830         ixgbe_service_event_schedule(adapter);
7831 }
7832
7833 static void ixgbe_phy_interrupt_subtask(struct ixgbe_adapter *adapter)
7834 {
7835         struct ixgbe_hw *hw = &adapter->hw;
7836         u32 status;
7837
7838         if (!(adapter->flags2 & IXGBE_FLAG2_PHY_INTERRUPT))
7839                 return;
7840
7841         adapter->flags2 &= ~IXGBE_FLAG2_PHY_INTERRUPT;
7842
7843         if (!hw->phy.ops.handle_lasi)
7844                 return;
7845
7846         status = hw->phy.ops.handle_lasi(&adapter->hw);
7847         if (status != IXGBE_ERR_OVERTEMP)
7848                 return;
7849
7850         e_crit(drv, "%s\n", ixgbe_overheat_msg);
7851 }
7852
7853 static void ixgbe_reset_subtask(struct ixgbe_adapter *adapter)
7854 {
7855         if (!test_and_clear_bit(__IXGBE_RESET_REQUESTED, &adapter->state))
7856                 return;
7857
7858         rtnl_lock();
7859         /* If we're already down, removing or resetting, just bail */
7860         if (test_bit(__IXGBE_DOWN, &adapter->state) ||
7861             test_bit(__IXGBE_REMOVING, &adapter->state) ||
7862             test_bit(__IXGBE_RESETTING, &adapter->state)) {
7863                 rtnl_unlock();
7864                 return;
7865         }
7866
7867         ixgbe_dump(adapter);
7868         netdev_err(adapter->netdev, "Reset adapter\n");
7869         adapter->tx_timeout_count++;
7870
7871         ixgbe_reinit_locked(adapter);
7872         rtnl_unlock();
7873 }
7874
7875 /**
7876  * ixgbe_check_fw_error - Check firmware for errors
7877  * @adapter: the adapter private structure
7878  *
7879  * Check firmware errors in register FWSM
7880  */
7881 static bool ixgbe_check_fw_error(struct ixgbe_adapter *adapter)
7882 {
7883         struct ixgbe_hw *hw = &adapter->hw;
7884         u32 fwsm;
7885
7886         /* read fwsm.ext_err_ind register and log errors */
7887         fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM(hw));
7888
7889         if (fwsm & IXGBE_FWSM_EXT_ERR_IND_MASK ||
7890             !(fwsm & IXGBE_FWSM_FW_VAL_BIT))
7891                 e_dev_warn("Warning firmware error detected FWSM: 0x%08X\n",
7892                            fwsm);
7893
7894         if (hw->mac.ops.fw_recovery_mode && hw->mac.ops.fw_recovery_mode(hw)) {
7895                 e_dev_err("Firmware recovery mode detected. Limiting functionality. Refer to the Intel(R) Ethernet Adapters and Devices User Guide for details on firmware recovery mode.\n");
7896                 return true;
7897         }
7898
7899         return false;
7900 }
7901
7902 /**
7903  * ixgbe_service_task - manages and runs subtasks
7904  * @work: pointer to work_struct containing our data
7905  **/
7906 static void ixgbe_service_task(struct work_struct *work)
7907 {
7908         struct ixgbe_adapter *adapter = container_of(work,
7909                                                      struct ixgbe_adapter,
7910                                                      service_task);
7911         if (ixgbe_removed(adapter->hw.hw_addr)) {
7912                 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
7913                         rtnl_lock();
7914                         ixgbe_down(adapter);
7915                         rtnl_unlock();
7916                 }
7917                 ixgbe_service_event_complete(adapter);
7918                 return;
7919         }
7920         if (ixgbe_check_fw_error(adapter)) {
7921                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
7922                         unregister_netdev(adapter->netdev);
7923                 ixgbe_service_event_complete(adapter);
7924                 return;
7925         }
7926         ixgbe_reset_subtask(adapter);
7927         ixgbe_phy_interrupt_subtask(adapter);
7928         ixgbe_sfp_detection_subtask(adapter);
7929         ixgbe_sfp_link_config_subtask(adapter);
7930         ixgbe_check_overtemp_subtask(adapter);
7931         ixgbe_watchdog_subtask(adapter);
7932         ixgbe_fdir_reinit_subtask(adapter);
7933         ixgbe_check_hang_subtask(adapter);
7934
7935         if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state)) {
7936                 ixgbe_ptp_overflow_check(adapter);
7937                 if (adapter->flags & IXGBE_FLAG_RX_HWTSTAMP_IN_REGISTER)
7938                         ixgbe_ptp_rx_hang(adapter);
7939                 ixgbe_ptp_tx_hang(adapter);
7940         }
7941
7942         ixgbe_service_event_complete(adapter);
7943 }
7944
7945 static int ixgbe_tso(struct ixgbe_ring *tx_ring,
7946                      struct ixgbe_tx_buffer *first,
7947                      u8 *hdr_len,
7948                      struct ixgbe_ipsec_tx_data *itd)
7949 {
7950         u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;
7951         struct sk_buff *skb = first->skb;
7952         union {
7953                 struct iphdr *v4;
7954                 struct ipv6hdr *v6;
7955                 unsigned char *hdr;
7956         } ip;
7957         union {
7958                 struct tcphdr *tcp;
7959                 struct udphdr *udp;
7960                 unsigned char *hdr;
7961         } l4;
7962         u32 paylen, l4_offset;
7963         u32 fceof_saidx = 0;
7964         int err;
7965
7966         if (skb->ip_summed != CHECKSUM_PARTIAL)
7967                 return 0;
7968
7969         if (!skb_is_gso(skb))
7970                 return 0;
7971
7972         err = skb_cow_head(skb, 0);
7973         if (err < 0)
7974                 return err;
7975
7976         if (eth_p_mpls(first->protocol))
7977                 ip.hdr = skb_inner_network_header(skb);
7978         else
7979                 ip.hdr = skb_network_header(skb);
7980         l4.hdr = skb_checksum_start(skb);
7981
7982         /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
7983         type_tucmd = (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) ?
7984                       IXGBE_ADVTXD_TUCMD_L4T_UDP : IXGBE_ADVTXD_TUCMD_L4T_TCP;
7985
7986         /* initialize outer IP header fields */
7987         if (ip.v4->version == 4) {
7988                 unsigned char *csum_start = skb_checksum_start(skb);
7989                 unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4);
7990                 int len = csum_start - trans_start;
7991
7992                 /* IP header will have to cancel out any data that
7993                  * is not a part of the outer IP header, so set to
7994                  * a reverse csum if needed, else init check to 0.
7995                  */
7996                 ip.v4->check = (skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) ?
7997                                            csum_fold(csum_partial(trans_start,
7998                                                                   len, 0)) : 0;
7999                 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
8000
8001                 ip.v4->tot_len = 0;
8002                 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
8003                                    IXGBE_TX_FLAGS_CSUM |
8004                                    IXGBE_TX_FLAGS_IPV4;
8005         } else {
8006                 ip.v6->payload_len = 0;
8007                 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
8008                                    IXGBE_TX_FLAGS_CSUM;
8009         }
8010
8011         /* determine offset of inner transport header */
8012         l4_offset = l4.hdr - skb->data;
8013
8014         /* remove payload length from inner checksum */
8015         paylen = skb->len - l4_offset;
8016
8017         if (type_tucmd & IXGBE_ADVTXD_TUCMD_L4T_TCP) {
8018                 /* compute length of segmentation header */
8019                 *hdr_len = (l4.tcp->doff * 4) + l4_offset;
8020                 csum_replace_by_diff(&l4.tcp->check,
8021                                      (__force __wsum)htonl(paylen));
8022         } else {
8023                 /* compute length of segmentation header */
8024                 *hdr_len = sizeof(*l4.udp) + l4_offset;
8025                 csum_replace_by_diff(&l4.udp->check,
8026                                      (__force __wsum)htonl(paylen));
8027         }
8028
8029         /* update gso size and bytecount with header size */
8030         first->gso_segs = skb_shinfo(skb)->gso_segs;
8031         first->bytecount += (first->gso_segs - 1) * *hdr_len;
8032
8033         /* mss_l4len_id: use 0 as index for TSO */
8034         mss_l4len_idx = (*hdr_len - l4_offset) << IXGBE_ADVTXD_L4LEN_SHIFT;
8035         mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
8036
8037         fceof_saidx |= itd->sa_idx;
8038         type_tucmd |= itd->flags | itd->trailer_len;
8039
8040         /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
8041         vlan_macip_lens = l4.hdr - ip.hdr;
8042         vlan_macip_lens |= (ip.hdr - skb->data) << IXGBE_ADVTXD_MACLEN_SHIFT;
8043         vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
8044
8045         ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, fceof_saidx, type_tucmd,
8046                           mss_l4len_idx);
8047
8048         return 1;
8049 }
8050
8051 static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
8052                           struct ixgbe_tx_buffer *first,
8053                           struct ixgbe_ipsec_tx_data *itd)
8054 {
8055         struct sk_buff *skb = first->skb;
8056         u32 vlan_macip_lens = 0;
8057         u32 fceof_saidx = 0;
8058         u32 type_tucmd = 0;
8059
8060         if (skb->ip_summed != CHECKSUM_PARTIAL) {
8061 csum_failed:
8062                 if (!(first->tx_flags & (IXGBE_TX_FLAGS_HW_VLAN |
8063                                          IXGBE_TX_FLAGS_CC)))
8064                         return;
8065                 goto no_csum;
8066         }
8067
8068         switch (skb->csum_offset) {
8069         case offsetof(struct tcphdr, check):
8070                 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
8071                 fallthrough;
8072         case offsetof(struct udphdr, check):
8073                 break;
8074         case offsetof(struct sctphdr, checksum):
8075                 /* validate that this is actually an SCTP request */
8076                 if (skb_csum_is_sctp(skb)) {
8077                         type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_SCTP;
8078                         break;
8079                 }
8080                 fallthrough;
8081         default:
8082                 skb_checksum_help(skb);
8083                 goto csum_failed;
8084         }
8085
8086         /* update TX checksum flag */
8087         first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
8088         vlan_macip_lens = skb_checksum_start_offset(skb) -
8089                           skb_network_offset(skb);
8090 no_csum:
8091         /* vlan_macip_lens: MACLEN, VLAN tag */
8092         vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
8093         vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
8094
8095         fceof_saidx |= itd->sa_idx;
8096         type_tucmd |= itd->flags | itd->trailer_len;
8097
8098         ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, fceof_saidx, type_tucmd, 0);
8099 }
8100
8101 #define IXGBE_SET_FLAG(_input, _flag, _result) \
8102         ((_flag <= _result) ? \
8103          ((u32)(_input & _flag) * (_result / _flag)) : \
8104          ((u32)(_input & _flag) / (_flag / _result)))
8105
8106 static u32 ixgbe_tx_cmd_type(struct sk_buff *skb, u32 tx_flags)
8107 {
8108         /* set type for advanced descriptor with frame checksum insertion */
8109         u32 cmd_type = IXGBE_ADVTXD_DTYP_DATA |
8110                        IXGBE_ADVTXD_DCMD_DEXT |
8111                        IXGBE_ADVTXD_DCMD_IFCS;
8112
8113         /* set HW vlan bit if vlan is present */
8114         cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_HW_VLAN,
8115                                    IXGBE_ADVTXD_DCMD_VLE);
8116
8117         /* set segmentation enable bits for TSO/FSO */
8118         cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSO,
8119                                    IXGBE_ADVTXD_DCMD_TSE);
8120
8121         /* set timestamp bit if present */
8122         cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSTAMP,
8123                                    IXGBE_ADVTXD_MAC_TSTAMP);
8124
8125         /* insert frame checksum */
8126         cmd_type ^= IXGBE_SET_FLAG(skb->no_fcs, 1, IXGBE_ADVTXD_DCMD_IFCS);
8127
8128         return cmd_type;
8129 }
8130
8131 static void ixgbe_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
8132                                    u32 tx_flags, unsigned int paylen)
8133 {
8134         u32 olinfo_status = paylen << IXGBE_ADVTXD_PAYLEN_SHIFT;
8135
8136         /* enable L4 checksum for TSO and TX checksum offload */
8137         olinfo_status |= IXGBE_SET_FLAG(tx_flags,
8138                                         IXGBE_TX_FLAGS_CSUM,
8139                                         IXGBE_ADVTXD_POPTS_TXSM);
8140
8141         /* enable IPv4 checksum for TSO */
8142         olinfo_status |= IXGBE_SET_FLAG(tx_flags,
8143                                         IXGBE_TX_FLAGS_IPV4,
8144                                         IXGBE_ADVTXD_POPTS_IXSM);
8145
8146         /* enable IPsec */
8147         olinfo_status |= IXGBE_SET_FLAG(tx_flags,
8148                                         IXGBE_TX_FLAGS_IPSEC,
8149                                         IXGBE_ADVTXD_POPTS_IPSEC);
8150
8151         /*
8152          * Check Context must be set if Tx switch is enabled, which it
8153          * always is for case where virtual functions are running
8154          */
8155         olinfo_status |= IXGBE_SET_FLAG(tx_flags,
8156                                         IXGBE_TX_FLAGS_CC,
8157                                         IXGBE_ADVTXD_CC);
8158
8159         tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
8160 }
8161
8162 static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
8163 {
8164         netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
8165
8166         /* Herbert's original patch had:
8167          *  smp_mb__after_netif_stop_queue();
8168          * but since that doesn't exist yet, just open code it.
8169          */
8170         smp_mb();
8171
8172         /* We need to check again in a case another CPU has just
8173          * made room available.
8174          */
8175         if (likely(ixgbe_desc_unused(tx_ring) < size))
8176                 return -EBUSY;
8177
8178         /* A reprieve! - use start_queue because it doesn't call schedule */
8179         netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
8180         ++tx_ring->tx_stats.restart_queue;
8181         return 0;
8182 }
8183
8184 static inline int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
8185 {
8186         if (likely(ixgbe_desc_unused(tx_ring) >= size))
8187                 return 0;
8188
8189         return __ixgbe_maybe_stop_tx(tx_ring, size);
8190 }
8191
8192 static int ixgbe_tx_map(struct ixgbe_ring *tx_ring,
8193                         struct ixgbe_tx_buffer *first,
8194                         const u8 hdr_len)
8195 {
8196         struct sk_buff *skb = first->skb;
8197         struct ixgbe_tx_buffer *tx_buffer;
8198         union ixgbe_adv_tx_desc *tx_desc;
8199         skb_frag_t *frag;
8200         dma_addr_t dma;
8201         unsigned int data_len, size;
8202         u32 tx_flags = first->tx_flags;
8203         u32 cmd_type = ixgbe_tx_cmd_type(skb, tx_flags);
8204         u16 i = tx_ring->next_to_use;
8205
8206         tx_desc = IXGBE_TX_DESC(tx_ring, i);
8207
8208         ixgbe_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len);
8209
8210         size = skb_headlen(skb);
8211         data_len = skb->data_len;
8212
8213 #ifdef IXGBE_FCOE
8214         if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
8215                 if (data_len < sizeof(struct fcoe_crc_eof)) {
8216                         size -= sizeof(struct fcoe_crc_eof) - data_len;
8217                         data_len = 0;
8218                 } else {
8219                         data_len -= sizeof(struct fcoe_crc_eof);
8220                 }
8221         }
8222
8223 #endif
8224         dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
8225
8226         tx_buffer = first;
8227
8228         for (frag = &skb_shinfo(skb)->frags[0];; frag++) {
8229                 if (dma_mapping_error(tx_ring->dev, dma))
8230                         goto dma_error;
8231
8232                 /* record length, and DMA address */
8233                 dma_unmap_len_set(tx_buffer, len, size);
8234                 dma_unmap_addr_set(tx_buffer, dma, dma);
8235
8236                 tx_desc->read.buffer_addr = cpu_to_le64(dma);
8237
8238                 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
8239                         tx_desc->read.cmd_type_len =
8240                                 cpu_to_le32(cmd_type ^ IXGBE_MAX_DATA_PER_TXD);
8241
8242                         i++;
8243                         tx_desc++;
8244                         if (i == tx_ring->count) {
8245                                 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
8246                                 i = 0;
8247                         }
8248                         tx_desc->read.olinfo_status = 0;
8249
8250                         dma += IXGBE_MAX_DATA_PER_TXD;
8251                         size -= IXGBE_MAX_DATA_PER_TXD;
8252
8253                         tx_desc->read.buffer_addr = cpu_to_le64(dma);
8254                 }
8255
8256                 if (likely(!data_len))
8257                         break;
8258
8259                 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type ^ size);
8260
8261                 i++;
8262                 tx_desc++;
8263                 if (i == tx_ring->count) {
8264                         tx_desc = IXGBE_TX_DESC(tx_ring, 0);
8265                         i = 0;
8266                 }
8267                 tx_desc->read.olinfo_status = 0;
8268
8269 #ifdef IXGBE_FCOE
8270                 size = min_t(unsigned int, data_len, skb_frag_size(frag));
8271 #else
8272                 size = skb_frag_size(frag);
8273 #endif
8274                 data_len -= size;
8275
8276                 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
8277                                        DMA_TO_DEVICE);
8278
8279                 tx_buffer = &tx_ring->tx_buffer_info[i];
8280         }
8281
8282         /* write last descriptor with RS and EOP bits */
8283         cmd_type |= size | IXGBE_TXD_CMD;
8284         tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
8285
8286         netdev_tx_sent_queue(txring_txq(tx_ring), first->bytecount);
8287
8288         /* set the timestamp */
8289         first->time_stamp = jiffies;
8290
8291         skb_tx_timestamp(skb);
8292
8293         /*
8294          * Force memory writes to complete before letting h/w know there
8295          * are new descriptors to fetch.  (Only applicable for weak-ordered
8296          * memory model archs, such as IA-64).
8297          *
8298          * We also need this memory barrier to make certain all of the
8299          * status bits have been updated before next_to_watch is written.
8300          */
8301         wmb();
8302
8303         /* set next_to_watch value indicating a packet is present */
8304         first->next_to_watch = tx_desc;
8305
8306         i++;
8307         if (i == tx_ring->count)
8308                 i = 0;
8309
8310         tx_ring->next_to_use = i;
8311
8312         ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);
8313
8314         if (netif_xmit_stopped(txring_txq(tx_ring)) || !netdev_xmit_more()) {
8315                 writel(i, tx_ring->tail);
8316         }
8317
8318         return 0;
8319 dma_error:
8320         dev_err(tx_ring->dev, "TX DMA map failed\n");
8321
8322         /* clear dma mappings for failed tx_buffer_info map */
8323         for (;;) {
8324                 tx_buffer = &tx_ring->tx_buffer_info[i];
8325                 if (dma_unmap_len(tx_buffer, len))
8326                         dma_unmap_page(tx_ring->dev,
8327                                        dma_unmap_addr(tx_buffer, dma),
8328                                        dma_unmap_len(tx_buffer, len),
8329                                        DMA_TO_DEVICE);
8330                 dma_unmap_len_set(tx_buffer, len, 0);
8331                 if (tx_buffer == first)
8332                         break;
8333                 if (i == 0)
8334                         i += tx_ring->count;
8335                 i--;
8336         }
8337
8338         dev_kfree_skb_any(first->skb);
8339         first->skb = NULL;
8340
8341         tx_ring->next_to_use = i;
8342
8343         return -1;
8344 }
8345
8346 static void ixgbe_atr(struct ixgbe_ring *ring,
8347                       struct ixgbe_tx_buffer *first)
8348 {
8349         struct ixgbe_q_vector *q_vector = ring->q_vector;
8350         union ixgbe_atr_hash_dword input = { .dword = 0 };
8351         union ixgbe_atr_hash_dword common = { .dword = 0 };
8352         union {
8353                 unsigned char *network;
8354                 struct iphdr *ipv4;
8355                 struct ipv6hdr *ipv6;
8356         } hdr;
8357         struct tcphdr *th;
8358         unsigned int hlen;
8359         struct sk_buff *skb;
8360         __be16 vlan_id;
8361         int l4_proto;
8362
8363         /* if ring doesn't have a interrupt vector, cannot perform ATR */
8364         if (!q_vector)
8365                 return;
8366
8367         /* do nothing if sampling is disabled */
8368         if (!ring->atr_sample_rate)
8369                 return;
8370
8371         ring->atr_count++;
8372
8373         /* currently only IPv4/IPv6 with TCP is supported */
8374         if ((first->protocol != htons(ETH_P_IP)) &&
8375             (first->protocol != htons(ETH_P_IPV6)))
8376                 return;
8377
8378         /* snag network header to get L4 type and address */
8379         skb = first->skb;
8380         hdr.network = skb_network_header(skb);
8381         if (unlikely(hdr.network <= skb->data))
8382                 return;
8383         if (skb->encapsulation &&
8384             first->protocol == htons(ETH_P_IP) &&
8385             hdr.ipv4->protocol == IPPROTO_UDP) {
8386                 struct ixgbe_adapter *adapter = q_vector->adapter;
8387
8388                 if (unlikely(skb_tail_pointer(skb) < hdr.network +
8389                              VXLAN_HEADROOM))
8390                         return;
8391
8392                 /* verify the port is recognized as VXLAN */
8393                 if (adapter->vxlan_port &&
8394                     udp_hdr(skb)->dest == adapter->vxlan_port)
8395                         hdr.network = skb_inner_network_header(skb);
8396
8397                 if (adapter->geneve_port &&
8398                     udp_hdr(skb)->dest == adapter->geneve_port)
8399                         hdr.network = skb_inner_network_header(skb);
8400         }
8401
8402         /* Make sure we have at least [minimum IPv4 header + TCP]
8403          * or [IPv6 header] bytes
8404          */
8405         if (unlikely(skb_tail_pointer(skb) < hdr.network + 40))
8406                 return;
8407
8408         /* Currently only IPv4/IPv6 with TCP is supported */
8409         switch (hdr.ipv4->version) {
8410         case IPVERSION:
8411                 /* access ihl as u8 to avoid unaligned access on ia64 */
8412                 hlen = (hdr.network[0] & 0x0F) << 2;
8413                 l4_proto = hdr.ipv4->protocol;
8414                 break;
8415         case 6:
8416                 hlen = hdr.network - skb->data;
8417                 l4_proto = ipv6_find_hdr(skb, &hlen, IPPROTO_TCP, NULL, NULL);
8418                 hlen -= hdr.network - skb->data;
8419                 break;
8420         default:
8421                 return;
8422         }
8423
8424         if (l4_proto != IPPROTO_TCP)
8425                 return;
8426
8427         if (unlikely(skb_tail_pointer(skb) < hdr.network +
8428                      hlen + sizeof(struct tcphdr)))
8429                 return;
8430
8431         th = (struct tcphdr *)(hdr.network + hlen);
8432
8433         /* skip this packet since the socket is closing */
8434         if (th->fin)
8435                 return;
8436
8437         /* sample on all syn packets or once every atr sample count */
8438         if (!th->syn && (ring->atr_count < ring->atr_sample_rate))
8439                 return;
8440
8441         /* reset sample count */
8442         ring->atr_count = 0;
8443
8444         vlan_id = htons(first->tx_flags >> IXGBE_TX_FLAGS_VLAN_SHIFT);
8445
8446         /*
8447          * src and dst are inverted, think how the receiver sees them
8448          *
8449          * The input is broken into two sections, a non-compressed section
8450          * containing vm_pool, vlan_id, and flow_type.  The rest of the data
8451          * is XORed together and stored in the compressed dword.
8452          */
8453         input.formatted.vlan_id = vlan_id;
8454
8455         /*
8456          * since src port and flex bytes occupy the same word XOR them together
8457          * and write the value to source port portion of compressed dword
8458          */
8459         if (first->tx_flags & (IXGBE_TX_FLAGS_SW_VLAN | IXGBE_TX_FLAGS_HW_VLAN))
8460                 common.port.src ^= th->dest ^ htons(ETH_P_8021Q);
8461         else
8462                 common.port.src ^= th->dest ^ first->protocol;
8463         common.port.dst ^= th->source;
8464
8465         switch (hdr.ipv4->version) {
8466         case IPVERSION:
8467                 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV4;
8468                 common.ip ^= hdr.ipv4->saddr ^ hdr.ipv4->daddr;
8469                 break;
8470         case 6:
8471                 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV6;
8472                 common.ip ^= hdr.ipv6->saddr.s6_addr32[0] ^
8473                              hdr.ipv6->saddr.s6_addr32[1] ^
8474                              hdr.ipv6->saddr.s6_addr32[2] ^
8475                              hdr.ipv6->saddr.s6_addr32[3] ^
8476                              hdr.ipv6->daddr.s6_addr32[0] ^
8477                              hdr.ipv6->daddr.s6_addr32[1] ^
8478                              hdr.ipv6->daddr.s6_addr32[2] ^
8479                              hdr.ipv6->daddr.s6_addr32[3];
8480                 break;
8481         default:
8482                 break;
8483         }
8484
8485         if (hdr.network != skb_network_header(skb))
8486                 input.formatted.flow_type |= IXGBE_ATR_L4TYPE_TUNNEL_MASK;
8487
8488         /* This assumes the Rx queue and Tx queue are bound to the same CPU */
8489         ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw,
8490                                               input, common, ring->queue_index);
8491 }
8492
8493 #ifdef IXGBE_FCOE
8494 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb,
8495                               struct net_device *sb_dev)
8496 {
8497         struct ixgbe_adapter *adapter;
8498         struct ixgbe_ring_feature *f;
8499         int txq;
8500
8501         if (sb_dev) {
8502                 u8 tc = netdev_get_prio_tc_map(dev, skb->priority);
8503                 struct net_device *vdev = sb_dev;
8504
8505                 txq = vdev->tc_to_txq[tc].offset;
8506                 txq += reciprocal_scale(skb_get_hash(skb),
8507                                         vdev->tc_to_txq[tc].count);
8508
8509                 return txq;
8510         }
8511
8512         /*
8513          * only execute the code below if protocol is FCoE
8514          * or FIP and we have FCoE enabled on the adapter
8515          */
8516         switch (vlan_get_protocol(skb)) {
8517         case htons(ETH_P_FCOE):
8518         case htons(ETH_P_FIP):
8519                 adapter = netdev_priv(dev);
8520
8521                 if (!sb_dev && (adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
8522                         break;
8523                 fallthrough;
8524         default:
8525                 return netdev_pick_tx(dev, skb, sb_dev);
8526         }
8527
8528         f = &adapter->ring_feature[RING_F_FCOE];
8529
8530         txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) :
8531                                            smp_processor_id();
8532
8533         while (txq >= f->indices)
8534                 txq -= f->indices;
8535
8536         return txq + f->offset;
8537 }
8538
8539 #endif
8540 int ixgbe_xmit_xdp_ring(struct ixgbe_adapter *adapter,
8541                         struct xdp_frame *xdpf)
8542 {
8543         struct ixgbe_ring *ring = adapter->xdp_ring[smp_processor_id()];
8544         struct ixgbe_tx_buffer *tx_buffer;
8545         union ixgbe_adv_tx_desc *tx_desc;
8546         u32 len, cmd_type;
8547         dma_addr_t dma;
8548         u16 i;
8549
8550         len = xdpf->len;
8551
8552         if (unlikely(!ixgbe_desc_unused(ring)))
8553                 return IXGBE_XDP_CONSUMED;
8554
8555         dma = dma_map_single(ring->dev, xdpf->data, len, DMA_TO_DEVICE);
8556         if (dma_mapping_error(ring->dev, dma))
8557                 return IXGBE_XDP_CONSUMED;
8558
8559         /* record the location of the first descriptor for this packet */
8560         tx_buffer = &ring->tx_buffer_info[ring->next_to_use];
8561         tx_buffer->bytecount = len;
8562         tx_buffer->gso_segs = 1;
8563         tx_buffer->protocol = 0;
8564
8565         i = ring->next_to_use;
8566         tx_desc = IXGBE_TX_DESC(ring, i);
8567
8568         dma_unmap_len_set(tx_buffer, len, len);
8569         dma_unmap_addr_set(tx_buffer, dma, dma);
8570         tx_buffer->xdpf = xdpf;
8571
8572         tx_desc->read.buffer_addr = cpu_to_le64(dma);
8573
8574         /* put descriptor type bits */
8575         cmd_type = IXGBE_ADVTXD_DTYP_DATA |
8576                    IXGBE_ADVTXD_DCMD_DEXT |
8577                    IXGBE_ADVTXD_DCMD_IFCS;
8578         cmd_type |= len | IXGBE_TXD_CMD;
8579         tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
8580         tx_desc->read.olinfo_status =
8581                 cpu_to_le32(len << IXGBE_ADVTXD_PAYLEN_SHIFT);
8582
8583         /* Avoid any potential race with xdp_xmit and cleanup */
8584         smp_wmb();
8585
8586         /* set next_to_watch value indicating a packet is present */
8587         i++;
8588         if (i == ring->count)
8589                 i = 0;
8590
8591         tx_buffer->next_to_watch = tx_desc;
8592         ring->next_to_use = i;
8593
8594         return IXGBE_XDP_TX;
8595 }
8596
8597 netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
8598                           struct ixgbe_adapter *adapter,
8599                           struct ixgbe_ring *tx_ring)
8600 {
8601         struct ixgbe_tx_buffer *first;
8602         int tso;
8603         u32 tx_flags = 0;
8604         unsigned short f;
8605         u16 count = TXD_USE_COUNT(skb_headlen(skb));
8606         struct ixgbe_ipsec_tx_data ipsec_tx = { 0 };
8607         __be16 protocol = skb->protocol;
8608         u8 hdr_len = 0;
8609
8610         /*
8611          * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
8612          *       + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
8613          *       + 2 desc gap to keep tail from touching head,
8614          *       + 1 desc for context descriptor,
8615          * otherwise try next time
8616          */
8617         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
8618                 count += TXD_USE_COUNT(skb_frag_size(
8619                                                 &skb_shinfo(skb)->frags[f]));
8620
8621         if (ixgbe_maybe_stop_tx(tx_ring, count + 3)) {
8622                 tx_ring->tx_stats.tx_busy++;
8623                 return NETDEV_TX_BUSY;
8624         }
8625
8626         /* record the location of the first descriptor for this packet */
8627         first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
8628         first->skb = skb;
8629         first->bytecount = skb->len;
8630         first->gso_segs = 1;
8631
8632         /* if we have a HW VLAN tag being added default to the HW one */
8633         if (skb_vlan_tag_present(skb)) {
8634                 tx_flags |= skb_vlan_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT;
8635                 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
8636         /* else if it is a SW VLAN check the next protocol and store the tag */
8637         } else if (protocol == htons(ETH_P_8021Q)) {
8638                 struct vlan_hdr *vhdr, _vhdr;
8639                 vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(_vhdr), &_vhdr);
8640                 if (!vhdr)
8641                         goto out_drop;
8642
8643                 tx_flags |= ntohs(vhdr->h_vlan_TCI) <<
8644                                   IXGBE_TX_FLAGS_VLAN_SHIFT;
8645                 tx_flags |= IXGBE_TX_FLAGS_SW_VLAN;
8646         }
8647         protocol = vlan_get_protocol(skb);
8648
8649         if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
8650             adapter->ptp_clock) {
8651                 if (adapter->tstamp_config.tx_type == HWTSTAMP_TX_ON &&
8652                     !test_and_set_bit_lock(__IXGBE_PTP_TX_IN_PROGRESS,
8653                                            &adapter->state)) {
8654                         skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
8655                         tx_flags |= IXGBE_TX_FLAGS_TSTAMP;
8656
8657                         /* schedule check for Tx timestamp */
8658                         adapter->ptp_tx_skb = skb_get(skb);
8659                         adapter->ptp_tx_start = jiffies;
8660                         schedule_work(&adapter->ptp_tx_work);
8661                 } else {
8662                         adapter->tx_hwtstamp_skipped++;
8663                 }
8664         }
8665
8666 #ifdef CONFIG_PCI_IOV
8667         /*
8668          * Use the l2switch_enable flag - would be false if the DMA
8669          * Tx switch had been disabled.
8670          */
8671         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
8672                 tx_flags |= IXGBE_TX_FLAGS_CC;
8673
8674 #endif
8675         /* DCB maps skb priorities 0-7 onto 3 bit PCP of VLAN tag. */
8676         if ((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
8677             ((tx_flags & (IXGBE_TX_FLAGS_HW_VLAN | IXGBE_TX_FLAGS_SW_VLAN)) ||
8678              (skb->priority != TC_PRIO_CONTROL))) {
8679                 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
8680                 tx_flags |= (skb->priority & 0x7) <<
8681                                         IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT;
8682                 if (tx_flags & IXGBE_TX_FLAGS_SW_VLAN) {
8683                         struct vlan_ethhdr *vhdr;
8684
8685                         if (skb_cow_head(skb, 0))
8686                                 goto out_drop;
8687                         vhdr = (struct vlan_ethhdr *)skb->data;
8688                         vhdr->h_vlan_TCI = htons(tx_flags >>
8689                                                  IXGBE_TX_FLAGS_VLAN_SHIFT);
8690                 } else {
8691                         tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
8692                 }
8693         }
8694
8695         /* record initial flags and protocol */
8696         first->tx_flags = tx_flags;
8697         first->protocol = protocol;
8698
8699 #ifdef IXGBE_FCOE
8700         /* setup tx offload for FCoE */
8701         if ((protocol == htons(ETH_P_FCOE)) &&
8702             (tx_ring->netdev->features & (NETIF_F_FSO | NETIF_F_FCOE_CRC))) {
8703                 tso = ixgbe_fso(tx_ring, first, &hdr_len);
8704                 if (tso < 0)
8705                         goto out_drop;
8706
8707                 goto xmit_fcoe;
8708         }
8709
8710 #endif /* IXGBE_FCOE */
8711
8712 #ifdef CONFIG_IXGBE_IPSEC
8713         if (xfrm_offload(skb) &&
8714             !ixgbe_ipsec_tx(tx_ring, first, &ipsec_tx))
8715                 goto out_drop;
8716 #endif
8717         tso = ixgbe_tso(tx_ring, first, &hdr_len, &ipsec_tx);
8718         if (tso < 0)
8719                 goto out_drop;
8720         else if (!tso)
8721                 ixgbe_tx_csum(tx_ring, first, &ipsec_tx);
8722
8723         /* add the ATR filter if ATR is on */
8724         if (test_bit(__IXGBE_TX_FDIR_INIT_DONE, &tx_ring->state))
8725                 ixgbe_atr(tx_ring, first);
8726
8727 #ifdef IXGBE_FCOE
8728 xmit_fcoe:
8729 #endif /* IXGBE_FCOE */
8730         if (ixgbe_tx_map(tx_ring, first, hdr_len))
8731                 goto cleanup_tx_timestamp;
8732
8733         return NETDEV_TX_OK;
8734
8735 out_drop:
8736         dev_kfree_skb_any(first->skb);
8737         first->skb = NULL;
8738 cleanup_tx_timestamp:
8739         if (unlikely(tx_flags & IXGBE_TX_FLAGS_TSTAMP)) {
8740                 dev_kfree_skb_any(adapter->ptp_tx_skb);
8741                 adapter->ptp_tx_skb = NULL;
8742                 cancel_work_sync(&adapter->ptp_tx_work);
8743                 clear_bit_unlock(__IXGBE_PTP_TX_IN_PROGRESS, &adapter->state);
8744         }
8745
8746         return NETDEV_TX_OK;
8747 }
8748
8749 static netdev_tx_t __ixgbe_xmit_frame(struct sk_buff *skb,
8750                                       struct net_device *netdev,
8751                                       struct ixgbe_ring *ring)
8752 {
8753         struct ixgbe_adapter *adapter = netdev_priv(netdev);
8754         struct ixgbe_ring *tx_ring;
8755
8756         /*
8757          * The minimum packet size for olinfo paylen is 17 so pad the skb
8758          * in order to meet this minimum size requirement.
8759          */
8760         if (skb_put_padto(skb, 17))
8761                 return NETDEV_TX_OK;
8762
8763         tx_ring = ring ? ring : adapter->tx_ring[skb_get_queue_mapping(skb)];
8764         if (unlikely(test_bit(__IXGBE_TX_DISABLED, &tx_ring->state)))
8765                 return NETDEV_TX_BUSY;
8766
8767         return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
8768 }
8769
8770 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
8771                                     struct net_device *netdev)
8772 {
8773         return __ixgbe_xmit_frame(skb, netdev, NULL);
8774 }
8775
8776 /**
8777  * ixgbe_set_mac - Change the Ethernet Address of the NIC
8778  * @netdev: network interface device structure
8779  * @p: pointer to an address structure
8780  *
8781  * Returns 0 on success, negative on failure
8782  **/
8783 static int ixgbe_set_mac(struct net_device *netdev, void *p)
8784 {
8785         struct ixgbe_adapter *adapter = netdev_priv(netdev);
8786         struct ixgbe_hw *hw = &adapter->hw;
8787         struct sockaddr *addr = p;
8788
8789         if (!is_valid_ether_addr(addr->sa_data))
8790                 return -EADDRNOTAVAIL;
8791
8792         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
8793         memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
8794
8795         ixgbe_mac_set_default_filter(adapter);
8796
8797         return 0;
8798 }
8799
8800 static int
8801 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
8802 {
8803         struct ixgbe_adapter *adapter = netdev_priv(netdev);
8804         struct ixgbe_hw *hw = &adapter->hw;
8805         u16 value;
8806         int rc;
8807
8808         if (adapter->mii_bus) {
8809                 int regnum = addr;
8810
8811                 if (devad != MDIO_DEVAD_NONE)
8812                         regnum |= (devad << 16) | MII_ADDR_C45;
8813
8814                 return mdiobus_read(adapter->mii_bus, prtad, regnum);
8815         }
8816
8817         if (prtad != hw->phy.mdio.prtad)
8818                 return -EINVAL;
8819         rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
8820         if (!rc)
8821                 rc = value;
8822         return rc;
8823 }
8824
8825 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
8826                             u16 addr, u16 value)
8827 {
8828         struct ixgbe_adapter *adapter = netdev_priv(netdev);
8829         struct ixgbe_hw *hw = &adapter->hw;
8830
8831         if (adapter->mii_bus) {
8832                 int regnum = addr;
8833
8834                 if (devad != MDIO_DEVAD_NONE)
8835                         regnum |= (devad << 16) | MII_ADDR_C45;
8836
8837                 return mdiobus_write(adapter->mii_bus, prtad, regnum, value);
8838         }
8839
8840         if (prtad != hw->phy.mdio.prtad)
8841                 return -EINVAL;
8842         return hw->phy.ops.write_reg(hw, addr, devad, value);
8843 }
8844
8845 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
8846 {
8847         struct ixgbe_adapter *adapter = netdev_priv(netdev);
8848
8849         switch (cmd) {
8850         case SIOCSHWTSTAMP:
8851                 return ixgbe_ptp_set_ts_config(adapter, req);
8852         case SIOCGHWTSTAMP:
8853                 return ixgbe_ptp_get_ts_config(adapter, req);
8854         case SIOCGMIIPHY:
8855                 if (!adapter->hw.phy.ops.read_reg)
8856                         return -EOPNOTSUPP;
8857                 fallthrough;
8858         default:
8859                 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
8860         }
8861 }
8862
8863 /**
8864  * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
8865  * netdev->dev_addrs
8866  * @dev: network interface device structure
8867  *
8868  * Returns non-zero on failure
8869  **/
8870 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
8871 {
8872         int err = 0;
8873         struct ixgbe_adapter *adapter = netdev_priv(dev);
8874         struct ixgbe_hw *hw = &adapter->hw;
8875
8876         if (is_valid_ether_addr(hw->mac.san_addr)) {
8877                 rtnl_lock();
8878                 err = dev_addr_add(dev, hw->mac.san_addr, NETDEV_HW_ADDR_T_SAN);
8879                 rtnl_unlock();
8880
8881                 /* update SAN MAC vmdq pool selection */
8882                 hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0));
8883         }
8884         return err;
8885 }
8886
8887 /**
8888  * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
8889  * netdev->dev_addrs
8890  * @dev: network interface device structure
8891  *
8892  * Returns non-zero on failure
8893  **/
8894 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
8895 {
8896         int err = 0;
8897         struct ixgbe_adapter *adapter = netdev_priv(dev);
8898         struct ixgbe_mac_info *mac = &adapter->hw.mac;
8899
8900         if (is_valid_ether_addr(mac->san_addr)) {
8901                 rtnl_lock();
8902                 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
8903                 rtnl_unlock();
8904         }
8905         return err;
8906 }
8907
8908 static void ixgbe_get_ring_stats64(struct rtnl_link_stats64 *stats,
8909                                    struct ixgbe_ring *ring)
8910 {
8911         u64 bytes, packets;
8912         unsigned int start;
8913
8914         if (ring) {
8915                 do {
8916                         start = u64_stats_fetch_begin_irq(&ring->syncp);
8917                         packets = ring->stats.packets;
8918                         bytes   = ring->stats.bytes;
8919                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
8920                 stats->tx_packets += packets;
8921                 stats->tx_bytes   += bytes;
8922         }
8923 }
8924
8925 static void ixgbe_get_stats64(struct net_device *netdev,
8926                               struct rtnl_link_stats64 *stats)
8927 {
8928         struct ixgbe_adapter *adapter = netdev_priv(netdev);
8929         int i;
8930
8931         rcu_read_lock();
8932         for (i = 0; i < adapter->num_rx_queues; i++) {
8933                 struct ixgbe_ring *ring = READ_ONCE(adapter->rx_ring[i]);
8934                 u64 bytes, packets;
8935                 unsigned int start;
8936
8937                 if (ring) {
8938                         do {
8939                                 start = u64_stats_fetch_begin_irq(&ring->syncp);
8940                                 packets = ring->stats.packets;
8941                                 bytes   = ring->stats.bytes;
8942                         } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
8943                         stats->rx_packets += packets;
8944                         stats->rx_bytes   += bytes;
8945                 }
8946         }
8947
8948         for (i = 0; i < adapter->num_tx_queues; i++) {
8949                 struct ixgbe_ring *ring = READ_ONCE(adapter->tx_ring[i]);
8950
8951                 ixgbe_get_ring_stats64(stats, ring);
8952         }
8953         for (i = 0; i < adapter->num_xdp_queues; i++) {
8954                 struct ixgbe_ring *ring = READ_ONCE(adapter->xdp_ring[i]);
8955
8956                 ixgbe_get_ring_stats64(stats, ring);
8957         }
8958         rcu_read_unlock();
8959
8960         /* following stats updated by ixgbe_watchdog_task() */
8961         stats->multicast        = netdev->stats.multicast;
8962         stats->rx_errors        = netdev->stats.rx_errors;
8963         stats->rx_length_errors = netdev->stats.rx_length_errors;
8964         stats->rx_crc_errors    = netdev->stats.rx_crc_errors;
8965         stats->rx_missed_errors = netdev->stats.rx_missed_errors;
8966 }
8967
8968 #ifdef CONFIG_IXGBE_DCB
8969 /**
8970  * ixgbe_validate_rtr - verify 802.1Qp to Rx packet buffer mapping is valid.
8971  * @adapter: pointer to ixgbe_adapter
8972  * @tc: number of traffic classes currently enabled
8973  *
8974  * Configure a valid 802.1Qp to Rx packet buffer mapping ie confirm
8975  * 802.1Q priority maps to a packet buffer that exists.
8976  */
8977 static void ixgbe_validate_rtr(struct ixgbe_adapter *adapter, u8 tc)
8978 {
8979         struct ixgbe_hw *hw = &adapter->hw;
8980         u32 reg, rsave;
8981         int i;
8982
8983         /* 82598 have a static priority to TC mapping that can not
8984          * be changed so no validation is needed.
8985          */
8986         if (hw->mac.type == ixgbe_mac_82598EB)
8987                 return;
8988
8989         reg = IXGBE_READ_REG(hw, IXGBE_RTRUP2TC);
8990         rsave = reg;
8991
8992         for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
8993                 u8 up2tc = reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT);
8994
8995                 /* If up2tc is out of bounds default to zero */
8996                 if (up2tc > tc)
8997                         reg &= ~(0x7 << IXGBE_RTRUP2TC_UP_SHIFT);
8998         }
8999
9000         if (reg != rsave)
9001                 IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
9002
9003         return;
9004 }
9005
9006 /**
9007  * ixgbe_set_prio_tc_map - Configure netdev prio tc map
9008  * @adapter: Pointer to adapter struct
9009  *
9010  * Populate the netdev user priority to tc map
9011  */
9012 static void ixgbe_set_prio_tc_map(struct ixgbe_adapter *adapter)
9013 {
9014         struct net_device *dev = adapter->netdev;
9015         struct ixgbe_dcb_config *dcb_cfg = &adapter->dcb_cfg;
9016         struct ieee_ets *ets = adapter->ixgbe_ieee_ets;
9017         u8 prio;
9018
9019         for (prio = 0; prio < MAX_USER_PRIORITY; prio++) {
9020                 u8 tc = 0;
9021
9022                 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE)
9023                         tc = ixgbe_dcb_get_tc_from_up(dcb_cfg, 0, prio);
9024                 else if (ets)
9025                         tc = ets->prio_tc[prio];
9026
9027                 netdev_set_prio_tc_map(dev, prio, tc);
9028         }
9029 }
9030
9031 #endif /* CONFIG_IXGBE_DCB */
9032 static int ixgbe_reassign_macvlan_pool(struct net_device *vdev,
9033                                        struct netdev_nested_priv *priv)
9034 {
9035         struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)priv->data;
9036         struct ixgbe_fwd_adapter *accel;
9037         int pool;
9038
9039         /* we only care about macvlans... */
9040         if (!netif_is_macvlan(vdev))
9041                 return 0;
9042
9043         /* that have hardware offload enabled... */
9044         accel = macvlan_accel_priv(vdev);
9045         if (!accel)
9046                 return 0;
9047
9048         /* If we can relocate to a different bit do so */
9049         pool = find_first_zero_bit(adapter->fwd_bitmask, adapter->num_rx_pools);
9050         if (pool < adapter->num_rx_pools) {
9051                 set_bit(pool, adapter->fwd_bitmask);
9052                 accel->pool = pool;
9053                 return 0;
9054         }
9055
9056         /* if we cannot find a free pool then disable the offload */
9057         netdev_err(vdev, "L2FW offload disabled due to lack of queue resources\n");
9058         macvlan_release_l2fw_offload(vdev);
9059
9060         /* unbind the queues and drop the subordinate channel config */
9061         netdev_unbind_sb_channel(adapter->netdev, vdev);
9062         netdev_set_sb_channel(vdev, 0);
9063
9064         kfree(accel);
9065
9066         return 0;
9067 }
9068
9069 static void ixgbe_defrag_macvlan_pools(struct net_device *dev)
9070 {
9071         struct ixgbe_adapter *adapter = netdev_priv(dev);
9072         struct netdev_nested_priv priv = {
9073                 .data = (void *)adapter,
9074         };
9075
9076         /* flush any stale bits out of the fwd bitmask */
9077         bitmap_clear(adapter->fwd_bitmask, 1, 63);
9078
9079         /* walk through upper devices reassigning pools */
9080         netdev_walk_all_upper_dev_rcu(dev, ixgbe_reassign_macvlan_pool,
9081                                       &priv);
9082 }
9083
9084 /**
9085  * ixgbe_setup_tc - configure net_device for multiple traffic classes
9086  *
9087  * @dev: net device to configure
9088  * @tc: number of traffic classes to enable
9089  */
9090 int ixgbe_setup_tc(struct net_device *dev, u8 tc)
9091 {
9092         struct ixgbe_adapter *adapter = netdev_priv(dev);
9093         struct ixgbe_hw *hw = &adapter->hw;
9094
9095         /* Hardware supports up to 8 traffic classes */
9096         if (tc > adapter->dcb_cfg.num_tcs.pg_tcs)
9097                 return -EINVAL;
9098
9099         if (hw->mac.type == ixgbe_mac_82598EB && tc && tc < MAX_TRAFFIC_CLASS)
9100                 return -EINVAL;
9101
9102         /* Hardware has to reinitialize queues and interrupts to
9103          * match packet buffer alignment. Unfortunately, the
9104          * hardware is not flexible enough to do this dynamically.
9105          */
9106         if (netif_running(dev))
9107                 ixgbe_close(dev);
9108         else
9109                 ixgbe_reset(adapter);
9110
9111         ixgbe_clear_interrupt_scheme(adapter);
9112
9113 #ifdef CONFIG_IXGBE_DCB
9114         if (tc) {
9115                 if (adapter->xdp_prog) {
9116                         e_warn(probe, "DCB is not supported with XDP\n");
9117
9118                         ixgbe_init_interrupt_scheme(adapter);
9119                         if (netif_running(dev))
9120                                 ixgbe_open(dev);
9121                         return -EINVAL;
9122                 }
9123
9124                 netdev_set_num_tc(dev, tc);
9125                 ixgbe_set_prio_tc_map(adapter);
9126
9127                 adapter->hw_tcs = tc;
9128                 adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
9129
9130                 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
9131                         adapter->last_lfc_mode = adapter->hw.fc.requested_mode;
9132                         adapter->hw.fc.requested_mode = ixgbe_fc_none;
9133                 }
9134         } else {
9135                 netdev_reset_tc(dev);
9136
9137                 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
9138                         adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
9139
9140                 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
9141                 adapter->hw_tcs = tc;
9142
9143                 adapter->temp_dcb_cfg.pfc_mode_enable = false;
9144                 adapter->dcb_cfg.pfc_mode_enable = false;
9145         }
9146
9147         ixgbe_validate_rtr(adapter, tc);
9148
9149 #endif /* CONFIG_IXGBE_DCB */
9150         ixgbe_init_interrupt_scheme(adapter);
9151
9152         ixgbe_defrag_macvlan_pools(dev);
9153
9154         if (netif_running(dev))
9155                 return ixgbe_open(dev);
9156
9157         return 0;
9158 }
9159
9160 static int ixgbe_delete_clsu32(struct ixgbe_adapter *adapter,
9161                                struct tc_cls_u32_offload *cls)
9162 {
9163         u32 hdl = cls->knode.handle;
9164         u32 uhtid = TC_U32_USERHTID(cls->knode.handle);
9165         u32 loc = cls->knode.handle & 0xfffff;
9166         int err = 0, i, j;
9167         struct ixgbe_jump_table *jump = NULL;
9168
9169         if (loc > IXGBE_MAX_HW_ENTRIES)
9170                 return -EINVAL;
9171
9172         if ((uhtid != 0x800) && (uhtid >= IXGBE_MAX_LINK_HANDLE))
9173                 return -EINVAL;
9174
9175         /* Clear this filter in the link data it is associated with */
9176         if (uhtid != 0x800) {
9177                 jump = adapter->jump_tables[uhtid];
9178                 if (!jump)
9179                         return -EINVAL;
9180                 if (!test_bit(loc - 1, jump->child_loc_map))
9181                         return -EINVAL;
9182                 clear_bit(loc - 1, jump->child_loc_map);
9183         }
9184
9185         /* Check if the filter being deleted is a link */
9186         for (i = 1; i < IXGBE_MAX_LINK_HANDLE; i++) {
9187                 jump = adapter->jump_tables[i];
9188                 if (jump && jump->link_hdl == hdl) {
9189                         /* Delete filters in the hardware in the child hash
9190                          * table associated with this link
9191                          */
9192                         for (j = 0; j < IXGBE_MAX_HW_ENTRIES; j++) {
9193                                 if (!test_bit(j, jump->child_loc_map))
9194                                         continue;
9195                                 spin_lock(&adapter->fdir_perfect_lock);
9196                                 err = ixgbe_update_ethtool_fdir_entry(adapter,
9197                                                                       NULL,
9198                                                                       j + 1);
9199                                 spin_unlock(&adapter->fdir_perfect_lock);
9200                                 clear_bit(j, jump->child_loc_map);
9201                         }
9202                         /* Remove resources for this link */
9203                         kfree(jump->input);
9204                         kfree(jump->mask);
9205                         kfree(jump);
9206                         adapter->jump_tables[i] = NULL;
9207                         return err;
9208                 }
9209         }
9210
9211         spin_lock(&adapter->fdir_perfect_lock);
9212         err = ixgbe_update_ethtool_fdir_entry(adapter, NULL, loc);
9213         spin_unlock(&adapter->fdir_perfect_lock);
9214         return err;
9215 }
9216
9217 static int ixgbe_configure_clsu32_add_hnode(struct ixgbe_adapter *adapter,
9218                                             struct tc_cls_u32_offload *cls)
9219 {
9220         u32 uhtid = TC_U32_USERHTID(cls->hnode.handle);
9221
9222         if (uhtid >= IXGBE_MAX_LINK_HANDLE)
9223                 return -EINVAL;
9224
9225         /* This ixgbe devices do not support hash tables at the moment
9226          * so abort when given hash tables.
9227          */
9228         if (cls->hnode.divisor > 0)
9229                 return -EINVAL;
9230
9231         set_bit(uhtid - 1, &adapter->tables);
9232         return 0;
9233 }
9234
9235 static int ixgbe_configure_clsu32_del_hnode(struct ixgbe_adapter *adapter,
9236                                             struct tc_cls_u32_offload *cls)
9237 {
9238         u32 uhtid = TC_U32_USERHTID(cls->hnode.handle);
9239
9240         if (uhtid >= IXGBE_MAX_LINK_HANDLE)
9241                 return -EINVAL;
9242
9243         clear_bit(uhtid - 1, &adapter->tables);
9244         return 0;
9245 }
9246
9247 #ifdef CONFIG_NET_CLS_ACT
9248 struct upper_walk_data {
9249         struct ixgbe_adapter *adapter;
9250         u64 action;
9251         int ifindex;
9252         u8 queue;
9253 };
9254
9255 static int get_macvlan_queue(struct net_device *upper,
9256                              struct netdev_nested_priv *priv)
9257 {
9258         if (netif_is_macvlan(upper)) {
9259                 struct ixgbe_fwd_adapter *vadapter = macvlan_accel_priv(upper);
9260                 struct ixgbe_adapter *adapter;
9261                 struct upper_walk_data *data;
9262                 int ifindex;
9263
9264                 data = (struct upper_walk_data *)priv->data;
9265                 ifindex = data->ifindex;
9266                 adapter = data->adapter;
9267                 if (vadapter && upper->ifindex == ifindex) {
9268                         data->queue = adapter->rx_ring[vadapter->rx_base_queue]->reg_idx;
9269                         data->action = data->queue;
9270                         return 1;
9271                 }
9272         }
9273
9274         return 0;
9275 }
9276
9277 static int handle_redirect_action(struct ixgbe_adapter *adapter, int ifindex,
9278                                   u8 *queue, u64 *action)
9279 {
9280         struct ixgbe_ring_feature *vmdq = &adapter->ring_feature[RING_F_VMDQ];
9281         unsigned int num_vfs = adapter->num_vfs, vf;
9282         struct netdev_nested_priv priv;
9283         struct upper_walk_data data;
9284         struct net_device *upper;
9285
9286         /* redirect to a SRIOV VF */
9287         for (vf = 0; vf < num_vfs; ++vf) {
9288                 upper = pci_get_drvdata(adapter->vfinfo[vf].vfdev);
9289                 if (upper->ifindex == ifindex) {
9290                         *queue = vf * __ALIGN_MASK(1, ~vmdq->mask);
9291                         *action = vf + 1;
9292                         *action <<= ETHTOOL_RX_FLOW_SPEC_RING_VF_OFF;
9293                         return 0;
9294                 }
9295         }
9296
9297         /* redirect to a offloaded macvlan netdev */
9298         data.adapter = adapter;
9299         data.ifindex = ifindex;
9300         data.action = 0;
9301         data.queue = 0;
9302         priv.data = (void *)&data;
9303         if (netdev_walk_all_upper_dev_rcu(adapter->netdev,
9304                                           get_macvlan_queue, &priv)) {
9305                 *action = data.action;
9306                 *queue = data.queue;
9307
9308                 return 0;
9309         }
9310
9311         return -EINVAL;
9312 }
9313
9314 static int parse_tc_actions(struct ixgbe_adapter *adapter,
9315                             struct tcf_exts *exts, u64 *action, u8 *queue)
9316 {
9317         const struct tc_action *a;
9318         int i;
9319
9320         if (!tcf_exts_has_actions(exts))
9321                 return -EINVAL;
9322
9323         tcf_exts_for_each_action(i, a, exts) {
9324                 /* Drop action */
9325                 if (is_tcf_gact_shot(a)) {
9326                         *action = IXGBE_FDIR_DROP_QUEUE;
9327                         *queue = IXGBE_FDIR_DROP_QUEUE;
9328                         return 0;
9329                 }
9330
9331                 /* Redirect to a VF or a offloaded macvlan */
9332                 if (is_tcf_mirred_egress_redirect(a)) {
9333                         struct net_device *dev = tcf_mirred_dev(a);
9334
9335                         if (!dev)
9336                                 return -EINVAL;
9337                         return handle_redirect_action(adapter, dev->ifindex,
9338                                                       queue, action);
9339                 }
9340
9341                 return -EINVAL;
9342         }
9343
9344         return -EINVAL;
9345 }
9346 #else
9347 static int parse_tc_actions(struct ixgbe_adapter *adapter,
9348                             struct tcf_exts *exts, u64 *action, u8 *queue)
9349 {
9350         return -EINVAL;
9351 }
9352 #endif /* CONFIG_NET_CLS_ACT */
9353
9354 static int ixgbe_clsu32_build_input(struct ixgbe_fdir_filter *input,
9355                                     union ixgbe_atr_input *mask,
9356                                     struct tc_cls_u32_offload *cls,
9357                                     struct ixgbe_mat_field *field_ptr,
9358                                     struct ixgbe_nexthdr *nexthdr)
9359 {
9360         int i, j, off;
9361         __be32 val, m;
9362         bool found_entry = false, found_jump_field = false;
9363
9364         for (i = 0; i < cls->knode.sel->nkeys; i++) {
9365                 off = cls->knode.sel->keys[i].off;
9366                 val = cls->knode.sel->keys[i].val;
9367                 m = cls->knode.sel->keys[i].mask;
9368
9369                 for (j = 0; field_ptr[j].val; j++) {
9370                         if (field_ptr[j].off == off) {
9371                                 field_ptr[j].val(input, mask, (__force u32)val,
9372                                                  (__force u32)m);
9373                                 input->filter.formatted.flow_type |=
9374                                         field_ptr[j].type;
9375                                 found_entry = true;
9376                                 break;
9377                         }
9378                 }
9379                 if (nexthdr) {
9380                         if (nexthdr->off == cls->knode.sel->keys[i].off &&
9381                             nexthdr->val ==
9382                             (__force u32)cls->knode.sel->keys[i].val &&
9383                             nexthdr->mask ==
9384                             (__force u32)cls->knode.sel->keys[i].mask)
9385                                 found_jump_field = true;
9386                         else
9387                                 continue;
9388                 }
9389         }
9390
9391         if (nexthdr && !found_jump_field)
9392                 return -EINVAL;
9393
9394         if (!found_entry)
9395                 return 0;
9396
9397         mask->formatted.flow_type = IXGBE_ATR_L4TYPE_IPV6_MASK |
9398                                     IXGBE_ATR_L4TYPE_MASK;
9399
9400         if (input->filter.formatted.flow_type == IXGBE_ATR_FLOW_TYPE_IPV4)
9401                 mask->formatted.flow_type &= IXGBE_ATR_L4TYPE_IPV6_MASK;
9402
9403         return 0;
9404 }
9405
9406 static int ixgbe_configure_clsu32(struct ixgbe_adapter *adapter,
9407                                   struct tc_cls_u32_offload *cls)
9408 {
9409         __be16 protocol = cls->common.protocol;
9410         u32 loc = cls->knode.handle & 0xfffff;
9411         struct ixgbe_hw *hw = &adapter->hw;
9412         struct ixgbe_mat_field *field_ptr;
9413         struct ixgbe_fdir_filter *input = NULL;
9414         union ixgbe_atr_input *mask = NULL;
9415         struct ixgbe_jump_table *jump = NULL;
9416         int i, err = -EINVAL;
9417         u8 queue;
9418         u32 uhtid, link_uhtid;
9419
9420         uhtid = TC_U32_USERHTID(cls->knode.handle);
9421         link_uhtid = TC_U32_USERHTID(cls->knode.link_handle);
9422
9423         /* At the moment cls_u32 jumps to network layer and skips past
9424          * L2 headers. The canonical method to match L2 frames is to use
9425          * negative values. However this is error prone at best but really
9426          * just broken because there is no way to "know" what sort of hdr
9427          * is in front of the network layer. Fix cls_u32 to support L2
9428          * headers when needed.
9429          */
9430         if (protocol != htons(ETH_P_IP))
9431                 return err;
9432
9433         if (loc >= ((1024 << adapter->fdir_pballoc) - 2)) {
9434                 e_err(drv, "Location out of range\n");
9435                 return err;
9436         }
9437
9438         /* cls u32 is a graph starting at root node 0x800. The driver tracks
9439          * links and also the fields used to advance the parser across each
9440          * link (e.g. nexthdr/eat parameters from 'tc'). This way we can map
9441          * the u32 graph onto the hardware parse graph denoted in ixgbe_model.h
9442          * To add support for new nodes update ixgbe_model.h parse structures
9443          * this function _should_ be generic try not to hardcode values here.
9444          */
9445         if (uhtid == 0x800) {
9446                 field_ptr = (adapter->jump_tables[0])->mat;
9447         } else {
9448                 if (uhtid >= IXGBE_MAX_LINK_HANDLE)
9449                         return err;
9450                 if (!adapter->jump_tables[uhtid])
9451                         return err;
9452                 field_ptr = (adapter->jump_tables[uhtid])->mat;
9453         }
9454
9455         if (!field_ptr)
9456                 return err;
9457
9458         /* At this point we know the field_ptr is valid and need to either
9459          * build cls_u32 link or attach filter. Because adding a link to
9460          * a handle that does not exist is invalid and the same for adding
9461          * rules to handles that don't exist.
9462          */
9463
9464         if (link_uhtid) {
9465                 struct ixgbe_nexthdr *nexthdr = ixgbe_ipv4_jumps;
9466
9467                 if (link_uhtid >= IXGBE_MAX_LINK_HANDLE)
9468                         return err;
9469
9470                 if (!test_bit(link_uhtid - 1, &adapter->tables))
9471                         return err;
9472
9473                 /* Multiple filters as links to the same hash table are not
9474                  * supported. To add a new filter with the same next header
9475                  * but different match/jump conditions, create a new hash table
9476                  * and link to it.
9477                  */
9478                 if (adapter->jump_tables[link_uhtid] &&
9479                     (adapter->jump_tables[link_uhtid])->link_hdl) {
9480                         e_err(drv, "Link filter exists for link: %x\n",
9481                               link_uhtid);
9482                         return err;
9483                 }
9484
9485                 for (i = 0; nexthdr[i].jump; i++) {
9486                         if (nexthdr[i].o != cls->knode.sel->offoff ||
9487                             nexthdr[i].s != cls->knode.sel->offshift ||
9488                             nexthdr[i].m !=
9489                             (__force u32)cls->knode.sel->offmask)
9490                                 return err;
9491
9492                         jump = kzalloc(sizeof(*jump), GFP_KERNEL);
9493                         if (!jump)
9494                                 return -ENOMEM;
9495                         input = kzalloc(sizeof(*input), GFP_KERNEL);
9496                         if (!input) {
9497                                 err = -ENOMEM;
9498                                 goto free_jump;
9499                         }
9500                         mask = kzalloc(sizeof(*mask), GFP_KERNEL);
9501                         if (!mask) {
9502                                 err = -ENOMEM;
9503                                 goto free_input;
9504                         }
9505                         jump->input = input;
9506                         jump->mask = mask;
9507                         jump->link_hdl = cls->knode.handle;
9508
9509                         err = ixgbe_clsu32_build_input(input, mask, cls,
9510                                                        field_ptr, &nexthdr[i]);
9511                         if (!err) {
9512                                 jump->mat = nexthdr[i].jump;
9513                                 adapter->jump_tables[link_uhtid] = jump;
9514                                 break;
9515                         } else {
9516                                 kfree(mask);
9517                                 kfree(input);
9518                                 kfree(jump);
9519                         }
9520                 }
9521                 return 0;
9522         }
9523
9524         input = kzalloc(sizeof(*input), GFP_KERNEL);
9525         if (!input)
9526                 return -ENOMEM;
9527         mask = kzalloc(sizeof(*mask), GFP_KERNEL);
9528         if (!mask) {
9529                 err = -ENOMEM;
9530                 goto free_input;
9531         }
9532
9533         if ((uhtid != 0x800) && (adapter->jump_tables[uhtid])) {
9534                 if ((adapter->jump_tables[uhtid])->input)
9535                         memcpy(input, (adapter->jump_tables[uhtid])->input,
9536                                sizeof(*input));
9537                 if ((adapter->jump_tables[uhtid])->mask)
9538                         memcpy(mask, (adapter->jump_tables[uhtid])->mask,
9539                                sizeof(*mask));
9540
9541                 /* Lookup in all child hash tables if this location is already
9542                  * filled with a filter
9543                  */
9544                 for (i = 1; i < IXGBE_MAX_LINK_HANDLE; i++) {
9545                         struct ixgbe_jump_table *link = adapter->jump_tables[i];
9546
9547                         if (link && (test_bit(loc - 1, link->child_loc_map))) {
9548                                 e_err(drv, "Filter exists in location: %x\n",
9549                                       loc);
9550                                 err = -EINVAL;
9551                                 goto err_out;
9552                         }
9553                 }
9554         }
9555         err = ixgbe_clsu32_build_input(input, mask, cls, field_ptr, NULL);
9556         if (err)
9557                 goto err_out;
9558
9559         err = parse_tc_actions(adapter, cls->knode.exts, &input->action,
9560                                &queue);
9561         if (err < 0)
9562                 goto err_out;
9563
9564         input->sw_idx = loc;
9565
9566         spin_lock(&adapter->fdir_perfect_lock);
9567
9568         if (hlist_empty(&adapter->fdir_filter_list)) {
9569                 memcpy(&adapter->fdir_mask, mask, sizeof(*mask));
9570                 err = ixgbe_fdir_set_input_mask_82599(hw, mask);
9571                 if (err)
9572                         goto err_out_w_lock;
9573         } else if (memcmp(&adapter->fdir_mask, mask, sizeof(*mask))) {
9574                 err = -EINVAL;
9575                 goto err_out_w_lock;
9576         }
9577
9578         ixgbe_atr_compute_perfect_hash_82599(&input->filter, mask);
9579         err = ixgbe_fdir_write_perfect_filter_82599(hw, &input->filter,
9580                                                     input->sw_idx, queue);
9581         if (err)
9582                 goto err_out_w_lock;
9583
9584         ixgbe_update_ethtool_fdir_entry(adapter, input, input->sw_idx);
9585         spin_unlock(&adapter->fdir_perfect_lock);
9586
9587         if ((uhtid != 0x800) && (adapter->jump_tables[uhtid]))
9588                 set_bit(loc - 1, (adapter->jump_tables[uhtid])->child_loc_map);
9589
9590         kfree(mask);
9591         return err;
9592 err_out_w_lock:
9593         spin_unlock(&adapter->fdir_perfect_lock);
9594 err_out:
9595         kfree(mask);
9596 free_input:
9597         kfree(input);
9598 free_jump:
9599         kfree(jump);
9600         return err;
9601 }
9602
9603 static int ixgbe_setup_tc_cls_u32(struct ixgbe_adapter *adapter,
9604                                   struct tc_cls_u32_offload *cls_u32)
9605 {
9606         switch (cls_u32->command) {
9607         case TC_CLSU32_NEW_KNODE:
9608         case TC_CLSU32_REPLACE_KNODE:
9609                 return ixgbe_configure_clsu32(adapter, cls_u32);
9610         case TC_CLSU32_DELETE_KNODE:
9611                 return ixgbe_delete_clsu32(adapter, cls_u32);
9612         case TC_CLSU32_NEW_HNODE:
9613         case TC_CLSU32_REPLACE_HNODE:
9614                 return ixgbe_configure_clsu32_add_hnode(adapter, cls_u32);
9615         case TC_CLSU32_DELETE_HNODE:
9616                 return ixgbe_configure_clsu32_del_hnode(adapter, cls_u32);
9617         default:
9618                 return -EOPNOTSUPP;
9619         }
9620 }
9621
9622 static int ixgbe_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
9623                                    void *cb_priv)
9624 {
9625         struct ixgbe_adapter *adapter = cb_priv;
9626
9627         if (!tc_cls_can_offload_and_chain0(adapter->netdev, type_data))
9628                 return -EOPNOTSUPP;
9629
9630         switch (type) {
9631         case TC_SETUP_CLSU32:
9632                 return ixgbe_setup_tc_cls_u32(adapter, type_data);
9633         default:
9634                 return -EOPNOTSUPP;
9635         }
9636 }
9637
9638 static int ixgbe_setup_tc_mqprio(struct net_device *dev,
9639                                  struct tc_mqprio_qopt *mqprio)
9640 {
9641         mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS;
9642         return ixgbe_setup_tc(dev, mqprio->num_tc);
9643 }
9644
9645 static LIST_HEAD(ixgbe_block_cb_list);
9646
9647 static int __ixgbe_setup_tc(struct net_device *dev, enum tc_setup_type type,
9648                             void *type_data)
9649 {
9650         struct ixgbe_adapter *adapter = netdev_priv(dev);
9651
9652         switch (type) {
9653         case TC_SETUP_BLOCK:
9654                 return flow_block_cb_setup_simple(type_data,
9655                                                   &ixgbe_block_cb_list,
9656                                                   ixgbe_setup_tc_block_cb,
9657                                                   adapter, adapter, true);
9658         case TC_SETUP_QDISC_MQPRIO:
9659                 return ixgbe_setup_tc_mqprio(dev, type_data);
9660         default:
9661                 return -EOPNOTSUPP;
9662         }
9663 }
9664
9665 #ifdef CONFIG_PCI_IOV
9666 void ixgbe_sriov_reinit(struct ixgbe_adapter *adapter)
9667 {
9668         struct net_device *netdev = adapter->netdev;
9669
9670         rtnl_lock();
9671         ixgbe_setup_tc(netdev, adapter->hw_tcs);
9672         rtnl_unlock();
9673 }
9674
9675 #endif
9676 void ixgbe_do_reset(struct net_device *netdev)
9677 {
9678         struct ixgbe_adapter *adapter = netdev_priv(netdev);
9679
9680         if (netif_running(netdev))
9681                 ixgbe_reinit_locked(adapter);
9682         else
9683                 ixgbe_reset(adapter);
9684 }
9685
9686 static netdev_features_t ixgbe_fix_features(struct net_device *netdev,
9687                                             netdev_features_t features)
9688 {
9689         struct ixgbe_adapter *adapter = netdev_priv(netdev);
9690
9691         /* If Rx checksum is disabled, then RSC/LRO should also be disabled */
9692         if (!(features & NETIF_F_RXCSUM))
9693                 features &= ~NETIF_F_LRO;
9694
9695         /* Turn off LRO if not RSC capable */
9696         if (!(adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE))
9697                 features &= ~NETIF_F_LRO;
9698
9699         if (adapter->xdp_prog && (features & NETIF_F_LRO)) {
9700                 e_dev_err("LRO is not supported with XDP\n");
9701                 features &= ~NETIF_F_LRO;
9702         }
9703
9704         return features;
9705 }
9706
9707 static void ixgbe_reset_l2fw_offload(struct ixgbe_adapter *adapter)
9708 {
9709         int rss = min_t(int, ixgbe_max_rss_indices(adapter),
9710                         num_online_cpus());
9711
9712         /* go back to full RSS if we're not running SR-IOV */
9713         if (!adapter->ring_feature[RING_F_VMDQ].offset)
9714                 adapter->flags &= ~(IXGBE_FLAG_VMDQ_ENABLED |
9715                                     IXGBE_FLAG_SRIOV_ENABLED);
9716
9717         adapter->ring_feature[RING_F_RSS].limit = rss;
9718         adapter->ring_feature[RING_F_VMDQ].limit = 1;
9719
9720         ixgbe_setup_tc(adapter->netdev, adapter->hw_tcs);
9721 }
9722
9723 static int ixgbe_set_features(struct net_device *netdev,
9724                               netdev_features_t features)
9725 {
9726         struct ixgbe_adapter *adapter = netdev_priv(netdev);
9727         netdev_features_t changed = netdev->features ^ features;
9728         bool need_reset = false;
9729
9730         /* Make sure RSC matches LRO, reset if change */
9731         if (!(features & NETIF_F_LRO)) {
9732                 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
9733                         need_reset = true;
9734                 adapter->flags2 &= ~IXGBE_FLAG2_RSC_ENABLED;
9735         } else if ((adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE) &&
9736                    !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)) {
9737                 if (adapter->rx_itr_setting == 1 ||
9738                     adapter->rx_itr_setting > IXGBE_MIN_RSC_ITR) {
9739                         adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
9740                         need_reset = true;
9741                 } else if ((changed ^ features) & NETIF_F_LRO) {
9742                         e_info(probe, "rx-usecs set too low, "
9743                                "disabling RSC\n");
9744                 }
9745         }
9746
9747         /*
9748          * Check if Flow Director n-tuple support or hw_tc support was
9749          * enabled or disabled.  If the state changed, we need to reset.
9750          */
9751         if ((features & NETIF_F_NTUPLE) || (features & NETIF_F_HW_TC)) {
9752                 /* turn off ATR, enable perfect filters and reset */
9753                 if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
9754                         need_reset = true;
9755
9756                 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
9757                 adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
9758         } else {
9759                 /* turn off perfect filters, enable ATR and reset */
9760                 if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
9761                         need_reset = true;
9762
9763                 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
9764
9765                 /* We cannot enable ATR if SR-IOV is enabled */
9766                 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED ||
9767                     /* We cannot enable ATR if we have 2 or more tcs */
9768                     (adapter->hw_tcs > 1) ||
9769                     /* We cannot enable ATR if RSS is disabled */
9770                     (adapter->ring_feature[RING_F_RSS].limit <= 1) ||
9771                     /* A sample rate of 0 indicates ATR disabled */
9772                     (!adapter->atr_sample_rate))
9773                         ; /* do nothing not supported */
9774                 else /* otherwise supported and set the flag */
9775                         adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
9776         }
9777
9778         if (changed & NETIF_F_RXALL)
9779                 need_reset = true;
9780
9781         netdev->features = features;
9782
9783         if ((changed & NETIF_F_HW_L2FW_DOFFLOAD) && adapter->num_rx_pools > 1)
9784                 ixgbe_reset_l2fw_offload(adapter);
9785         else if (need_reset)
9786                 ixgbe_do_reset(netdev);
9787         else if (changed & (NETIF_F_HW_VLAN_CTAG_RX |
9788                             NETIF_F_HW_VLAN_CTAG_FILTER))
9789                 ixgbe_set_rx_mode(netdev);
9790
9791         return 1;
9792 }
9793
9794 static int ixgbe_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
9795                              struct net_device *dev,
9796                              const unsigned char *addr, u16 vid,
9797                              u16 flags,
9798                              struct netlink_ext_ack *extack)
9799 {
9800         /* guarantee we can provide a unique filter for the unicast address */
9801         if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) {
9802                 struct ixgbe_adapter *adapter = netdev_priv(dev);
9803                 u16 pool = VMDQ_P(0);
9804
9805                 if (netdev_uc_count(dev) >= ixgbe_available_rars(adapter, pool))
9806                         return -ENOMEM;
9807         }
9808
9809         return ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, flags);
9810 }
9811
9812 /**
9813  * ixgbe_configure_bridge_mode - set various bridge modes
9814  * @adapter: the private structure
9815  * @mode: requested bridge mode
9816  *
9817  * Configure some settings require for various bridge modes.
9818  **/
9819 static int ixgbe_configure_bridge_mode(struct ixgbe_adapter *adapter,
9820                                        __u16 mode)
9821 {
9822         struct ixgbe_hw *hw = &adapter->hw;
9823         unsigned int p, num_pools;
9824         u32 vmdctl;
9825
9826         switch (mode) {
9827         case BRIDGE_MODE_VEPA:
9828                 /* disable Tx loopback, rely on switch hairpin mode */
9829                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_PFDTXGSWC, 0);
9830
9831                 /* must enable Rx switching replication to allow multicast
9832                  * packet reception on all VFs, and to enable source address
9833                  * pruning.
9834                  */
9835                 vmdctl = IXGBE_READ_REG(hw, IXGBE_VMD_CTL);
9836                 vmdctl |= IXGBE_VT_CTL_REPLEN;
9837                 IXGBE_WRITE_REG(hw, IXGBE_VMD_CTL, vmdctl);
9838
9839                 /* enable Rx source address pruning. Note, this requires
9840                  * replication to be enabled or else it does nothing.
9841                  */
9842                 num_pools = adapter->num_vfs + adapter->num_rx_pools;
9843                 for (p = 0; p < num_pools; p++) {
9844                         if (hw->mac.ops.set_source_address_pruning)
9845                                 hw->mac.ops.set_source_address_pruning(hw,
9846                                                                        true,
9847                                                                        p);
9848                 }
9849                 break;
9850         case BRIDGE_MODE_VEB:
9851                 /* enable Tx loopback for internal VF/PF communication */
9852                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_PFDTXGSWC,
9853                                 IXGBE_PFDTXGSWC_VT_LBEN);
9854
9855                 /* disable Rx switching replication unless we have SR-IOV
9856                  * virtual functions
9857                  */
9858                 vmdctl = IXGBE_READ_REG(hw, IXGBE_VMD_CTL);
9859                 if (!adapter->num_vfs)
9860                         vmdctl &= ~IXGBE_VT_CTL_REPLEN;
9861                 IXGBE_WRITE_REG(hw, IXGBE_VMD_CTL, vmdctl);
9862
9863                 /* disable Rx source address pruning, since we don't expect to
9864                  * be receiving external loopback of our transmitted frames.
9865                  */
9866                 num_pools = adapter->num_vfs + adapter->num_rx_pools;
9867                 for (p = 0; p < num_pools; p++) {
9868                         if (hw->mac.ops.set_source_address_pruning)
9869                                 hw->mac.ops.set_source_address_pruning(hw,
9870                                                                        false,
9871                                                                        p);
9872                 }
9873                 break;
9874         default:
9875                 return -EINVAL;
9876         }
9877
9878         adapter->bridge_mode = mode;
9879
9880         e_info(drv, "enabling bridge mode: %s\n",
9881                mode == BRIDGE_MODE_VEPA ? "VEPA" : "VEB");
9882
9883         return 0;
9884 }
9885
9886 static int ixgbe_ndo_bridge_setlink(struct net_device *dev,
9887                                     struct nlmsghdr *nlh, u16 flags,
9888                                     struct netlink_ext_ack *extack)
9889 {
9890         struct ixgbe_adapter *adapter = netdev_priv(dev);
9891         struct nlattr *attr, *br_spec;
9892         int rem;
9893
9894         if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
9895                 return -EOPNOTSUPP;
9896
9897         br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
9898         if (!br_spec)
9899                 return -EINVAL;
9900
9901         nla_for_each_nested(attr, br_spec, rem) {
9902                 int status;
9903                 __u16 mode;
9904
9905                 if (nla_type(attr) != IFLA_BRIDGE_MODE)
9906                         continue;
9907
9908                 if (nla_len(attr) < sizeof(mode))
9909                         return -EINVAL;
9910
9911                 mode = nla_get_u16(attr);
9912                 status = ixgbe_configure_bridge_mode(adapter, mode);
9913                 if (status)
9914                         return status;
9915
9916                 break;
9917         }
9918
9919         return 0;
9920 }
9921
9922 static int ixgbe_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
9923                                     struct net_device *dev,
9924                                     u32 filter_mask, int nlflags)
9925 {
9926         struct ixgbe_adapter *adapter = netdev_priv(dev);
9927
9928         if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
9929                 return 0;
9930
9931         return ndo_dflt_bridge_getlink(skb, pid, seq, dev,
9932                                        adapter->bridge_mode, 0, 0, nlflags,
9933                                        filter_mask, NULL);
9934 }
9935
9936 static void *ixgbe_fwd_add(struct net_device *pdev, struct net_device *vdev)
9937 {
9938         struct ixgbe_adapter *adapter = netdev_priv(pdev);
9939         struct ixgbe_fwd_adapter *accel;
9940         int tcs = adapter->hw_tcs ? : 1;
9941         int pool, err;
9942
9943         if (adapter->xdp_prog) {
9944                 e_warn(probe, "L2FW offload is not supported with XDP\n");
9945                 return ERR_PTR(-EINVAL);
9946         }
9947
9948         /* The hardware supported by ixgbe only filters on the destination MAC
9949          * address. In order to avoid issues we only support offloading modes
9950          * where the hardware can actually provide the functionality.
9951          */
9952         if (!macvlan_supports_dest_filter(vdev))
9953                 return ERR_PTR(-EMEDIUMTYPE);
9954
9955         /* We need to lock down the macvlan to be a single queue device so that
9956          * we can reuse the tc_to_txq field in the macvlan netdev to represent
9957          * the queue mapping to our netdev.
9958          */
9959         if (netif_is_multiqueue(vdev))
9960                 return ERR_PTR(-ERANGE);
9961
9962         pool = find_first_zero_bit(adapter->fwd_bitmask, adapter->num_rx_pools);
9963         if (pool == adapter->num_rx_pools) {
9964                 u16 used_pools = adapter->num_vfs + adapter->num_rx_pools;
9965                 u16 reserved_pools;
9966
9967                 if (((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
9968                      adapter->num_rx_pools >= (MAX_TX_QUEUES / tcs)) ||
9969                     adapter->num_rx_pools > IXGBE_MAX_MACVLANS)
9970                         return ERR_PTR(-EBUSY);
9971
9972                 /* Hardware has a limited number of available pools. Each VF,
9973                  * and the PF require a pool. Check to ensure we don't
9974                  * attempt to use more then the available number of pools.
9975                  */
9976                 if (used_pools >= IXGBE_MAX_VF_FUNCTIONS)
9977                         return ERR_PTR(-EBUSY);
9978
9979                 /* Enable VMDq flag so device will be set in VM mode */
9980                 adapter->flags |= IXGBE_FLAG_VMDQ_ENABLED |
9981                                   IXGBE_FLAG_SRIOV_ENABLED;
9982
9983                 /* Try to reserve as many queues per pool as possible,
9984                  * we start with the configurations that support 4 queues
9985                  * per pools, followed by 2, and then by just 1 per pool.
9986                  */
9987                 if (used_pools < 32 && adapter->num_rx_pools < 16)
9988                         reserved_pools = min_t(u16,
9989                                                32 - used_pools,
9990                                                16 - adapter->num_rx_pools);
9991                 else if (adapter->num_rx_pools < 32)
9992                         reserved_pools = min_t(u16,
9993                                                64 - used_pools,
9994                                                32 - adapter->num_rx_pools);
9995                 else
9996                         reserved_pools = 64 - used_pools;
9997
9998
9999                 if (!reserved_pools)
10000                         return ERR_PTR(-EBUSY);
10001
10002                 adapter->ring_feature[RING_F_VMDQ].limit += reserved_pools;
10003
10004                 /* Force reinit of ring allocation with VMDQ enabled */
10005                 err = ixgbe_setup_tc(pdev, adapter->hw_tcs);
10006                 if (err)
10007                         return ERR_PTR(err);
10008
10009                 if (pool >= adapter->num_rx_pools)
10010                         return ERR_PTR(-ENOMEM);
10011         }
10012
10013         accel = kzalloc(sizeof(*accel), GFP_KERNEL);
10014         if (!accel)
10015                 return ERR_PTR(-ENOMEM);
10016
10017         set_bit(pool, adapter->fwd_bitmask);
10018         netdev_set_sb_channel(vdev, pool);
10019         accel->pool = pool;
10020         accel->netdev = vdev;
10021
10022         if (!netif_running(pdev))
10023                 return accel;
10024
10025         err = ixgbe_fwd_ring_up(adapter, accel);
10026         if (err)
10027                 return ERR_PTR(err);
10028
10029         return accel;
10030 }
10031
10032 static void ixgbe_fwd_del(struct net_device *pdev, void *priv)
10033 {
10034         struct ixgbe_fwd_adapter *accel = priv;
10035         struct ixgbe_adapter *adapter = netdev_priv(pdev);
10036         unsigned int rxbase = accel->rx_base_queue;
10037         unsigned int i;
10038
10039         /* delete unicast filter associated with offloaded interface */
10040         ixgbe_del_mac_filter(adapter, accel->netdev->dev_addr,
10041                              VMDQ_P(accel->pool));
10042
10043         /* Allow remaining Rx packets to get flushed out of the
10044          * Rx FIFO before we drop the netdev for the ring.
10045          */
10046         usleep_range(10000, 20000);
10047
10048         for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
10049                 struct ixgbe_ring *ring = adapter->rx_ring[rxbase + i];
10050                 struct ixgbe_q_vector *qv = ring->q_vector;
10051
10052                 /* Make sure we aren't processing any packets and clear
10053                  * netdev to shut down the ring.
10054                  */
10055                 if (netif_running(adapter->netdev))
10056                         napi_synchronize(&qv->napi);
10057                 ring->netdev = NULL;
10058         }
10059
10060         /* unbind the queues and drop the subordinate channel config */
10061         netdev_unbind_sb_channel(pdev, accel->netdev);
10062         netdev_set_sb_channel(accel->netdev, 0);
10063
10064         clear_bit(accel->pool, adapter->fwd_bitmask);
10065         kfree(accel);
10066 }
10067
10068 #define IXGBE_MAX_MAC_HDR_LEN           127
10069 #define IXGBE_MAX_NETWORK_HDR_LEN       511
10070
10071 static netdev_features_t
10072 ixgbe_features_check(struct sk_buff *skb, struct net_device *dev,
10073                      netdev_features_t features)
10074 {
10075         unsigned int network_hdr_len, mac_hdr_len;
10076
10077         /* Make certain the headers can be described by a context descriptor */
10078         mac_hdr_len = skb_network_header(skb) - skb->data;
10079         if (unlikely(mac_hdr_len > IXGBE_MAX_MAC_HDR_LEN))
10080                 return features & ~(NETIF_F_HW_CSUM |
10081                                     NETIF_F_SCTP_CRC |
10082                                     NETIF_F_GSO_UDP_L4 |
10083                                     NETIF_F_HW_VLAN_CTAG_TX |
10084                                     NETIF_F_TSO |
10085                                     NETIF_F_TSO6);
10086
10087         network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);
10088         if (unlikely(network_hdr_len >  IXGBE_MAX_NETWORK_HDR_LEN))
10089                 return features & ~(NETIF_F_HW_CSUM |
10090                                     NETIF_F_SCTP_CRC |
10091                                     NETIF_F_GSO_UDP_L4 |
10092                                     NETIF_F_TSO |
10093                                     NETIF_F_TSO6);
10094
10095         /* We can only support IPV4 TSO in tunnels if we can mangle the
10096          * inner IP ID field, so strip TSO if MANGLEID is not supported.
10097          * IPsec offoad sets skb->encapsulation but still can handle
10098          * the TSO, so it's the exception.
10099          */
10100         if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID)) {
10101 #ifdef CONFIG_IXGBE_IPSEC
10102                 if (!secpath_exists(skb))
10103 #endif
10104                         features &= ~NETIF_F_TSO;
10105         }
10106
10107         return features;
10108 }
10109
10110 static int ixgbe_xdp_setup(struct net_device *dev, struct bpf_prog *prog)
10111 {
10112         int i, frame_size = dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
10113         struct ixgbe_adapter *adapter = netdev_priv(dev);
10114         struct bpf_prog *old_prog;
10115         bool need_reset;
10116
10117         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
10118                 return -EINVAL;
10119
10120         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
10121                 return -EINVAL;
10122
10123         /* verify ixgbe ring attributes are sufficient for XDP */
10124         for (i = 0; i < adapter->num_rx_queues; i++) {
10125                 struct ixgbe_ring *ring = adapter->rx_ring[i];
10126
10127                 if (ring_is_rsc_enabled(ring))
10128                         return -EINVAL;
10129
10130                 if (frame_size > ixgbe_rx_bufsz(ring))
10131                         return -EINVAL;
10132         }
10133
10134         if (nr_cpu_ids > MAX_XDP_QUEUES)
10135                 return -ENOMEM;
10136
10137         old_prog = xchg(&adapter->xdp_prog, prog);
10138         need_reset = (!!prog != !!old_prog);
10139
10140         /* If transitioning XDP modes reconfigure rings */
10141         if (need_reset) {
10142                 int err;
10143
10144                 if (!prog)
10145                         /* Wait until ndo_xsk_wakeup completes. */
10146                         synchronize_rcu();
10147                 err = ixgbe_setup_tc(dev, adapter->hw_tcs);
10148
10149                 if (err) {
10150                         rcu_assign_pointer(adapter->xdp_prog, old_prog);
10151                         return -EINVAL;
10152                 }
10153         } else {
10154                 for (i = 0; i < adapter->num_rx_queues; i++)
10155                         (void)xchg(&adapter->rx_ring[i]->xdp_prog,
10156                             adapter->xdp_prog);
10157         }
10158
10159         if (old_prog)
10160                 bpf_prog_put(old_prog);
10161
10162         /* Kick start the NAPI context if there is an AF_XDP socket open
10163          * on that queue id. This so that receiving will start.
10164          */
10165         if (need_reset && prog)
10166                 for (i = 0; i < adapter->num_rx_queues; i++)
10167                         if (adapter->xdp_ring[i]->xsk_pool)
10168                                 (void)ixgbe_xsk_wakeup(adapter->netdev, i,
10169                                                        XDP_WAKEUP_RX);
10170
10171         return 0;
10172 }
10173
10174 static int ixgbe_xdp(struct net_device *dev, struct netdev_bpf *xdp)
10175 {
10176         struct ixgbe_adapter *adapter = netdev_priv(dev);
10177
10178         switch (xdp->command) {
10179         case XDP_SETUP_PROG:
10180                 return ixgbe_xdp_setup(dev, xdp->prog);
10181         case XDP_SETUP_XSK_POOL:
10182                 return ixgbe_xsk_pool_setup(adapter, xdp->xsk.pool,
10183                                             xdp->xsk.queue_id);
10184
10185         default:
10186                 return -EINVAL;
10187         }
10188 }
10189
10190 void ixgbe_xdp_ring_update_tail(struct ixgbe_ring *ring)
10191 {
10192         /* Force memory writes to complete before letting h/w know there
10193          * are new descriptors to fetch.
10194          */
10195         wmb();
10196         writel(ring->next_to_use, ring->tail);
10197 }
10198
10199 static int ixgbe_xdp_xmit(struct net_device *dev, int n,
10200                           struct xdp_frame **frames, u32 flags)
10201 {
10202         struct ixgbe_adapter *adapter = netdev_priv(dev);
10203         struct ixgbe_ring *ring;
10204         int nxmit = 0;
10205         int i;
10206
10207         if (unlikely(test_bit(__IXGBE_DOWN, &adapter->state)))
10208                 return -ENETDOWN;
10209
10210         if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
10211                 return -EINVAL;
10212
10213         /* During program transitions its possible adapter->xdp_prog is assigned
10214          * but ring has not been configured yet. In this case simply abort xmit.
10215          */
10216         ring = adapter->xdp_prog ? adapter->xdp_ring[smp_processor_id()] : NULL;
10217         if (unlikely(!ring))
10218                 return -ENXIO;
10219
10220         if (unlikely(test_bit(__IXGBE_TX_DISABLED, &ring->state)))
10221                 return -ENXIO;
10222
10223         for (i = 0; i < n; i++) {
10224                 struct xdp_frame *xdpf = frames[i];
10225                 int err;
10226
10227                 err = ixgbe_xmit_xdp_ring(adapter, xdpf);
10228                 if (err != IXGBE_XDP_TX)
10229                         break;
10230                 nxmit++;
10231         }
10232
10233         if (unlikely(flags & XDP_XMIT_FLUSH))
10234                 ixgbe_xdp_ring_update_tail(ring);
10235
10236         return nxmit;
10237 }
10238
10239 static const struct net_device_ops ixgbe_netdev_ops = {
10240         .ndo_open               = ixgbe_open,
10241         .ndo_stop               = ixgbe_close,
10242         .ndo_start_xmit         = ixgbe_xmit_frame,
10243         .ndo_set_rx_mode        = ixgbe_set_rx_mode,
10244         .ndo_validate_addr      = eth_validate_addr,
10245         .ndo_set_mac_address    = ixgbe_set_mac,
10246         .ndo_change_mtu         = ixgbe_change_mtu,
10247         .ndo_tx_timeout         = ixgbe_tx_timeout,
10248         .ndo_set_tx_maxrate     = ixgbe_tx_maxrate,
10249         .ndo_vlan_rx_add_vid    = ixgbe_vlan_rx_add_vid,
10250         .ndo_vlan_rx_kill_vid   = ixgbe_vlan_rx_kill_vid,
10251         .ndo_do_ioctl           = ixgbe_ioctl,
10252         .ndo_set_vf_mac         = ixgbe_ndo_set_vf_mac,
10253         .ndo_set_vf_vlan        = ixgbe_ndo_set_vf_vlan,
10254         .ndo_set_vf_rate        = ixgbe_ndo_set_vf_bw,
10255         .ndo_set_vf_spoofchk    = ixgbe_ndo_set_vf_spoofchk,
10256         .ndo_set_vf_rss_query_en = ixgbe_ndo_set_vf_rss_query_en,
10257         .ndo_set_vf_trust       = ixgbe_ndo_set_vf_trust,
10258         .ndo_get_vf_config      = ixgbe_ndo_get_vf_config,
10259         .ndo_get_stats64        = ixgbe_get_stats64,
10260         .ndo_setup_tc           = __ixgbe_setup_tc,
10261 #ifdef IXGBE_FCOE
10262         .ndo_select_queue       = ixgbe_select_queue,
10263         .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
10264         .ndo_fcoe_ddp_target = ixgbe_fcoe_ddp_target,
10265         .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
10266         .ndo_fcoe_enable = ixgbe_fcoe_enable,
10267         .ndo_fcoe_disable = ixgbe_fcoe_disable,
10268         .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
10269         .ndo_fcoe_get_hbainfo = ixgbe_fcoe_get_hbainfo,
10270 #endif /* IXGBE_FCOE */
10271         .ndo_set_features = ixgbe_set_features,
10272         .ndo_fix_features = ixgbe_fix_features,
10273         .ndo_fdb_add            = ixgbe_ndo_fdb_add,
10274         .ndo_bridge_setlink     = ixgbe_ndo_bridge_setlink,
10275         .ndo_bridge_getlink     = ixgbe_ndo_bridge_getlink,
10276         .ndo_dfwd_add_station   = ixgbe_fwd_add,
10277         .ndo_dfwd_del_station   = ixgbe_fwd_del,
10278         .ndo_features_check     = ixgbe_features_check,
10279         .ndo_bpf                = ixgbe_xdp,
10280         .ndo_xdp_xmit           = ixgbe_xdp_xmit,
10281         .ndo_xsk_wakeup         = ixgbe_xsk_wakeup,
10282 };
10283
10284 static void ixgbe_disable_txr_hw(struct ixgbe_adapter *adapter,
10285                                  struct ixgbe_ring *tx_ring)
10286 {
10287         unsigned long wait_delay, delay_interval;
10288         struct ixgbe_hw *hw = &adapter->hw;
10289         u8 reg_idx = tx_ring->reg_idx;
10290         int wait_loop;
10291         u32 txdctl;
10292
10293         IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
10294
10295         /* delay mechanism from ixgbe_disable_tx */
10296         delay_interval = ixgbe_get_completion_timeout(adapter) / 100;
10297
10298         wait_loop = IXGBE_MAX_RX_DESC_POLL;
10299         wait_delay = delay_interval;
10300
10301         while (wait_loop--) {
10302                 usleep_range(wait_delay, wait_delay + 10);
10303                 wait_delay += delay_interval * 2;
10304                 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
10305
10306                 if (!(txdctl & IXGBE_TXDCTL_ENABLE))
10307                         return;
10308         }
10309
10310         e_err(drv, "TXDCTL.ENABLE not cleared within the polling period\n");
10311 }
10312
10313 static void ixgbe_disable_txr(struct ixgbe_adapter *adapter,
10314                               struct ixgbe_ring *tx_ring)
10315 {
10316         set_bit(__IXGBE_TX_DISABLED, &tx_ring->state);
10317         ixgbe_disable_txr_hw(adapter, tx_ring);
10318 }
10319
10320 static void ixgbe_disable_rxr_hw(struct ixgbe_adapter *adapter,
10321                                  struct ixgbe_ring *rx_ring)
10322 {
10323         unsigned long wait_delay, delay_interval;
10324         struct ixgbe_hw *hw = &adapter->hw;
10325         u8 reg_idx = rx_ring->reg_idx;
10326         int wait_loop;
10327         u32 rxdctl;
10328
10329         rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
10330         rxdctl &= ~IXGBE_RXDCTL_ENABLE;
10331         rxdctl |= IXGBE_RXDCTL_SWFLSH;
10332
10333         /* write value back with RXDCTL.ENABLE bit cleared */
10334         IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
10335
10336         /* RXDCTL.EN may not change on 82598 if link is down, so skip it */
10337         if (hw->mac.type == ixgbe_mac_82598EB &&
10338             !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
10339                 return;
10340
10341         /* delay mechanism from ixgbe_disable_rx */
10342         delay_interval = ixgbe_get_completion_timeout(adapter) / 100;
10343
10344         wait_loop = IXGBE_MAX_RX_DESC_POLL;
10345         wait_delay = delay_interval;
10346
10347         while (wait_loop--) {
10348                 usleep_range(wait_delay, wait_delay + 10);
10349                 wait_delay += delay_interval * 2;
10350                 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
10351
10352                 if (!(rxdctl & IXGBE_RXDCTL_ENABLE))
10353                         return;
10354         }
10355
10356         e_err(drv, "RXDCTL.ENABLE not cleared within the polling period\n");
10357 }
10358
10359 static void ixgbe_reset_txr_stats(struct ixgbe_ring *tx_ring)
10360 {
10361         memset(&tx_ring->stats, 0, sizeof(tx_ring->stats));
10362         memset(&tx_ring->tx_stats, 0, sizeof(tx_ring->tx_stats));
10363 }
10364
10365 static void ixgbe_reset_rxr_stats(struct ixgbe_ring *rx_ring)
10366 {
10367         memset(&rx_ring->stats, 0, sizeof(rx_ring->stats));
10368         memset(&rx_ring->rx_stats, 0, sizeof(rx_ring->rx_stats));
10369 }
10370
10371 /**
10372  * ixgbe_txrx_ring_disable - Disable Rx/Tx/XDP Tx rings
10373  * @adapter: adapter structure
10374  * @ring: ring index
10375  *
10376  * This function disables a certain Rx/Tx/XDP Tx ring. The function
10377  * assumes that the netdev is running.
10378  **/
10379 void ixgbe_txrx_ring_disable(struct ixgbe_adapter *adapter, int ring)
10380 {
10381         struct ixgbe_ring *rx_ring, *tx_ring, *xdp_ring;
10382
10383         rx_ring = adapter->rx_ring[ring];
10384         tx_ring = adapter->tx_ring[ring];
10385         xdp_ring = adapter->xdp_ring[ring];
10386
10387         ixgbe_disable_txr(adapter, tx_ring);
10388         if (xdp_ring)
10389                 ixgbe_disable_txr(adapter, xdp_ring);
10390         ixgbe_disable_rxr_hw(adapter, rx_ring);
10391
10392         if (xdp_ring)
10393                 synchronize_rcu();
10394
10395         /* Rx/Tx/XDP Tx share the same napi context. */
10396         napi_disable(&rx_ring->q_vector->napi);
10397
10398         ixgbe_clean_tx_ring(tx_ring);
10399         if (xdp_ring)
10400                 ixgbe_clean_tx_ring(xdp_ring);
10401         ixgbe_clean_rx_ring(rx_ring);
10402
10403         ixgbe_reset_txr_stats(tx_ring);
10404         if (xdp_ring)
10405                 ixgbe_reset_txr_stats(xdp_ring);
10406         ixgbe_reset_rxr_stats(rx_ring);
10407 }
10408
10409 /**
10410  * ixgbe_txrx_ring_enable - Enable Rx/Tx/XDP Tx rings
10411  * @adapter: adapter structure
10412  * @ring: ring index
10413  *
10414  * This function enables a certain Rx/Tx/XDP Tx ring. The function
10415  * assumes that the netdev is running.
10416  **/
10417 void ixgbe_txrx_ring_enable(struct ixgbe_adapter *adapter, int ring)
10418 {
10419         struct ixgbe_ring *rx_ring, *tx_ring, *xdp_ring;
10420
10421         rx_ring = adapter->rx_ring[ring];
10422         tx_ring = adapter->tx_ring[ring];
10423         xdp_ring = adapter->xdp_ring[ring];
10424
10425         /* Rx/Tx/XDP Tx share the same napi context. */
10426         napi_enable(&rx_ring->q_vector->napi);
10427
10428         ixgbe_configure_tx_ring(adapter, tx_ring);
10429         if (xdp_ring)
10430                 ixgbe_configure_tx_ring(adapter, xdp_ring);
10431         ixgbe_configure_rx_ring(adapter, rx_ring);
10432
10433         clear_bit(__IXGBE_TX_DISABLED, &tx_ring->state);
10434         if (xdp_ring)
10435                 clear_bit(__IXGBE_TX_DISABLED, &xdp_ring->state);
10436 }
10437
10438 /**
10439  * ixgbe_enumerate_functions - Get the number of ports this device has
10440  * @adapter: adapter structure
10441  *
10442  * This function enumerates the phsyical functions co-located on a single slot,
10443  * in order to determine how many ports a device has. This is most useful in
10444  * determining the required GT/s of PCIe bandwidth necessary for optimal
10445  * performance.
10446  **/
10447 static inline int ixgbe_enumerate_functions(struct ixgbe_adapter *adapter)
10448 {
10449         struct pci_dev *entry, *pdev = adapter->pdev;
10450         int physfns = 0;
10451
10452         /* Some cards can not use the generic count PCIe functions method,
10453          * because they are behind a parent switch, so we hardcode these with
10454          * the correct number of functions.
10455          */
10456         if (ixgbe_pcie_from_parent(&adapter->hw))
10457                 physfns = 4;
10458
10459         list_for_each_entry(entry, &adapter->pdev->bus->devices, bus_list) {
10460                 /* don't count virtual functions */
10461                 if (entry->is_virtfn)
10462                         continue;
10463
10464                 /* When the devices on the bus don't all match our device ID,
10465                  * we can't reliably determine the correct number of
10466                  * functions. This can occur if a function has been direct
10467                  * attached to a virtual machine using VT-d, for example. In
10468                  * this case, simply return -1 to indicate this.
10469                  */
10470                 if ((entry->vendor != pdev->vendor) ||
10471                     (entry->device != pdev->device))
10472                         return -1;
10473
10474                 physfns++;
10475         }
10476
10477         return physfns;
10478 }
10479
10480 /**
10481  * ixgbe_wol_supported - Check whether device supports WoL
10482  * @adapter: the adapter private structure
10483  * @device_id: the device ID
10484  * @subdevice_id: the subsystem device ID
10485  *
10486  * This function is used by probe and ethtool to determine
10487  * which devices have WoL support
10488  *
10489  **/
10490 bool ixgbe_wol_supported(struct ixgbe_adapter *adapter, u16 device_id,
10491                          u16 subdevice_id)
10492 {
10493         struct ixgbe_hw *hw = &adapter->hw;
10494         u16 wol_cap = adapter->eeprom_cap & IXGBE_DEVICE_CAPS_WOL_MASK;
10495
10496         /* WOL not supported on 82598 */
10497         if (hw->mac.type == ixgbe_mac_82598EB)
10498                 return false;
10499
10500         /* check eeprom to see if WOL is enabled for X540 and newer */
10501         if (hw->mac.type >= ixgbe_mac_X540) {
10502                 if ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0_1) ||
10503                     ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0) &&
10504                      (hw->bus.func == 0)))
10505                         return true;
10506         }
10507
10508         /* WOL is determined based on device IDs for 82599 MACs */
10509         switch (device_id) {
10510         case IXGBE_DEV_ID_82599_SFP:
10511                 /* Only these subdevices could supports WOL */
10512                 switch (subdevice_id) {
10513                 case IXGBE_SUBDEV_ID_82599_560FLR:
10514                 case IXGBE_SUBDEV_ID_82599_LOM_SNAP6:
10515                 case IXGBE_SUBDEV_ID_82599_SFP_WOL0:
10516                 case IXGBE_SUBDEV_ID_82599_SFP_2OCP:
10517                         /* only support first port */
10518                         if (hw->bus.func != 0)
10519                                 break;
10520                         fallthrough;
10521                 case IXGBE_SUBDEV_ID_82599_SP_560FLR:
10522                 case IXGBE_SUBDEV_ID_82599_SFP:
10523                 case IXGBE_SUBDEV_ID_82599_RNDC:
10524                 case IXGBE_SUBDEV_ID_82599_ECNA_DP:
10525                 case IXGBE_SUBDEV_ID_82599_SFP_1OCP:
10526                 case IXGBE_SUBDEV_ID_82599_SFP_LOM_OEM1:
10527                 case IXGBE_SUBDEV_ID_82599_SFP_LOM_OEM2:
10528                         return true;
10529                 }
10530                 break;
10531         case IXGBE_DEV_ID_82599EN_SFP:
10532                 /* Only these subdevices support WOL */
10533                 switch (subdevice_id) {
10534                 case IXGBE_SUBDEV_ID_82599EN_SFP_OCP1:
10535                         return true;
10536                 }
10537                 break;
10538         case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
10539                 /* All except this subdevice support WOL */
10540                 if (subdevice_id != IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ)
10541                         return true;
10542                 break;
10543         case IXGBE_DEV_ID_82599_KX4:
10544                 return  true;
10545         default:
10546                 break;
10547         }
10548
10549         return false;
10550 }
10551
10552 /**
10553  * ixgbe_set_fw_version - Set FW version
10554  * @adapter: the adapter private structure
10555  *
10556  * This function is used by probe and ethtool to determine the FW version to
10557  * format to display. The FW version is taken from the EEPROM/NVM.
10558  */
10559 static void ixgbe_set_fw_version(struct ixgbe_adapter *adapter)
10560 {
10561         struct ixgbe_hw *hw = &adapter->hw;
10562         struct ixgbe_nvm_version nvm_ver;
10563
10564         ixgbe_get_oem_prod_version(hw, &nvm_ver);
10565         if (nvm_ver.oem_valid) {
10566                 snprintf(adapter->eeprom_id, sizeof(adapter->eeprom_id),
10567                          "%x.%x.%x", nvm_ver.oem_major, nvm_ver.oem_minor,
10568                          nvm_ver.oem_release);
10569                 return;
10570         }
10571
10572         ixgbe_get_etk_id(hw, &nvm_ver);
10573         ixgbe_get_orom_version(hw, &nvm_ver);
10574
10575         if (nvm_ver.or_valid) {
10576                 snprintf(adapter->eeprom_id, sizeof(adapter->eeprom_id),
10577                          "0x%08x, %d.%d.%d", nvm_ver.etk_id, nvm_ver.or_major,
10578                          nvm_ver.or_build, nvm_ver.or_patch);
10579                 return;
10580         }
10581
10582         /* Set ETrack ID format */
10583         snprintf(adapter->eeprom_id, sizeof(adapter->eeprom_id),
10584                  "0x%08x", nvm_ver.etk_id);
10585 }
10586
10587 /**
10588  * ixgbe_probe - Device Initialization Routine
10589  * @pdev: PCI device information struct
10590  * @ent: entry in ixgbe_pci_tbl
10591  *
10592  * Returns 0 on success, negative on failure
10593  *
10594  * ixgbe_probe initializes an adapter identified by a pci_dev structure.
10595  * The OS initialization, configuring of the adapter private structure,
10596  * and a hardware reset occur.
10597  **/
10598 static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
10599 {
10600         struct net_device *netdev;
10601         struct ixgbe_adapter *adapter = NULL;
10602         struct ixgbe_hw *hw;
10603         const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
10604         int i, err, pci_using_dac, expected_gts;
10605         unsigned int indices = MAX_TX_QUEUES;
10606         u8 part_str[IXGBE_PBANUM_LENGTH];
10607         bool disable_dev = false;
10608 #ifdef IXGBE_FCOE
10609         u16 device_caps;
10610 #endif
10611         u32 eec;
10612
10613         /* Catch broken hardware that put the wrong VF device ID in
10614          * the PCIe SR-IOV capability.
10615          */
10616         if (pdev->is_virtfn) {
10617                 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
10618                      pci_name(pdev), pdev->vendor, pdev->device);
10619                 return -EINVAL;
10620         }
10621
10622         err = pci_enable_device_mem(pdev);
10623         if (err)
10624                 return err;
10625
10626         if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
10627                 pci_using_dac = 1;
10628         } else {
10629                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
10630                 if (err) {
10631                         dev_err(&pdev->dev,
10632                                 "No usable DMA configuration, aborting\n");
10633                         goto err_dma;
10634                 }
10635                 pci_using_dac = 0;
10636         }
10637
10638         err = pci_request_mem_regions(pdev, ixgbe_driver_name);
10639         if (err) {
10640                 dev_err(&pdev->dev,
10641                         "pci_request_selected_regions failed 0x%x\n", err);
10642                 goto err_pci_reg;
10643         }
10644
10645         pci_enable_pcie_error_reporting(pdev);
10646
10647         pci_set_master(pdev);
10648         pci_save_state(pdev);
10649
10650         if (ii->mac == ixgbe_mac_82598EB) {
10651 #ifdef CONFIG_IXGBE_DCB
10652                 /* 8 TC w/ 4 queues per TC */
10653                 indices = 4 * MAX_TRAFFIC_CLASS;
10654 #else
10655                 indices = IXGBE_MAX_RSS_INDICES;
10656 #endif
10657         }
10658
10659         netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
10660         if (!netdev) {
10661                 err = -ENOMEM;
10662                 goto err_alloc_etherdev;
10663         }
10664
10665         SET_NETDEV_DEV(netdev, &pdev->dev);
10666
10667         adapter = netdev_priv(netdev);
10668
10669         adapter->netdev = netdev;
10670         adapter->pdev = pdev;
10671         hw = &adapter->hw;
10672         hw->back = adapter;
10673         adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
10674
10675         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
10676                               pci_resource_len(pdev, 0));
10677         adapter->io_addr = hw->hw_addr;
10678         if (!hw->hw_addr) {
10679                 err = -EIO;
10680                 goto err_ioremap;
10681         }
10682
10683         netdev->netdev_ops = &ixgbe_netdev_ops;
10684         ixgbe_set_ethtool_ops(netdev);
10685         netdev->watchdog_timeo = 5 * HZ;
10686         strlcpy(netdev->name, pci_name(pdev), sizeof(netdev->name));
10687
10688         /* Setup hw api */
10689         hw->mac.ops   = *ii->mac_ops;
10690         hw->mac.type  = ii->mac;
10691         hw->mvals     = ii->mvals;
10692         if (ii->link_ops)
10693                 hw->link.ops  = *ii->link_ops;
10694
10695         /* EEPROM */
10696         hw->eeprom.ops = *ii->eeprom_ops;
10697         eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
10698         if (ixgbe_removed(hw->hw_addr)) {
10699                 err = -EIO;
10700                 goto err_ioremap;
10701         }
10702         /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
10703         if (!(eec & BIT(8)))
10704                 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
10705
10706         /* PHY */
10707         hw->phy.ops = *ii->phy_ops;
10708         hw->phy.sfp_type = ixgbe_sfp_type_unknown;
10709         /* ixgbe_identify_phy_generic will set prtad and mmds properly */
10710         hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
10711         hw->phy.mdio.mmds = 0;
10712         hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
10713         hw->phy.mdio.dev = netdev;
10714         hw->phy.mdio.mdio_read = ixgbe_mdio_read;
10715         hw->phy.mdio.mdio_write = ixgbe_mdio_write;
10716
10717         /* setup the private structure */
10718         err = ixgbe_sw_init(adapter, ii);
10719         if (err)
10720                 goto err_sw_init;
10721
10722         switch (adapter->hw.mac.type) {
10723         case ixgbe_mac_X550:
10724         case ixgbe_mac_X550EM_x:
10725                 netdev->udp_tunnel_nic_info = &ixgbe_udp_tunnels_x550;
10726                 break;
10727         case ixgbe_mac_x550em_a:
10728                 netdev->udp_tunnel_nic_info = &ixgbe_udp_tunnels_x550em_a;
10729                 break;
10730         default:
10731                 break;
10732         }
10733
10734         /* Make sure the SWFW semaphore is in a valid state */
10735         if (hw->mac.ops.init_swfw_sync)
10736                 hw->mac.ops.init_swfw_sync(hw);
10737
10738         /* Make it possible the adapter to be woken up via WOL */
10739         switch (adapter->hw.mac.type) {
10740         case ixgbe_mac_82599EB:
10741         case ixgbe_mac_X540:
10742         case ixgbe_mac_X550:
10743         case ixgbe_mac_X550EM_x:
10744         case ixgbe_mac_x550em_a:
10745                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
10746                 break;
10747         default:
10748                 break;
10749         }
10750
10751         /*
10752          * If there is a fan on this device and it has failed log the
10753          * failure.
10754          */
10755         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
10756                 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
10757                 if (esdp & IXGBE_ESDP_SDP1)
10758                         e_crit(probe, "Fan has stopped, replace the adapter\n");
10759         }
10760
10761         if (allow_unsupported_sfp)
10762                 hw->allow_unsupported_sfp = allow_unsupported_sfp;
10763
10764         /* reset_hw fills in the perm_addr as well */
10765         hw->phy.reset_if_overtemp = true;
10766         err = hw->mac.ops.reset_hw(hw);
10767         hw->phy.reset_if_overtemp = false;
10768         ixgbe_set_eee_capable(adapter);
10769         if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
10770                 err = 0;
10771         } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
10772                 e_dev_err("failed to load because an unsupported SFP+ or QSFP module type was detected.\n");
10773                 e_dev_err("Reload the driver after installing a supported module.\n");
10774                 goto err_sw_init;
10775         } else if (err) {
10776                 e_dev_err("HW Init failed: %d\n", err);
10777                 goto err_sw_init;
10778         }
10779
10780 #ifdef CONFIG_PCI_IOV
10781         /* SR-IOV not supported on the 82598 */
10782         if (adapter->hw.mac.type == ixgbe_mac_82598EB)
10783                 goto skip_sriov;
10784         /* Mailbox */
10785         ixgbe_init_mbx_params_pf(hw);
10786         hw->mbx.ops = ii->mbx_ops;
10787         pci_sriov_set_totalvfs(pdev, IXGBE_MAX_VFS_DRV_LIMIT);
10788         ixgbe_enable_sriov(adapter, max_vfs);
10789 skip_sriov:
10790
10791 #endif
10792         netdev->features = NETIF_F_SG |
10793                            NETIF_F_TSO |
10794                            NETIF_F_TSO6 |
10795                            NETIF_F_RXHASH |
10796                            NETIF_F_RXCSUM |
10797                            NETIF_F_HW_CSUM;
10798
10799 #define IXGBE_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
10800                                     NETIF_F_GSO_GRE_CSUM | \
10801                                     NETIF_F_GSO_IPXIP4 | \
10802                                     NETIF_F_GSO_IPXIP6 | \
10803                                     NETIF_F_GSO_UDP_TUNNEL | \
10804                                     NETIF_F_GSO_UDP_TUNNEL_CSUM)
10805
10806         netdev->gso_partial_features = IXGBE_GSO_PARTIAL_FEATURES;
10807         netdev->features |= NETIF_F_GSO_PARTIAL |
10808                             IXGBE_GSO_PARTIAL_FEATURES;
10809
10810         if (hw->mac.type >= ixgbe_mac_82599EB)
10811                 netdev->features |= NETIF_F_SCTP_CRC | NETIF_F_GSO_UDP_L4;
10812
10813 #ifdef CONFIG_IXGBE_IPSEC
10814 #define IXGBE_ESP_FEATURES      (NETIF_F_HW_ESP | \
10815                                  NETIF_F_HW_ESP_TX_CSUM | \
10816                                  NETIF_F_GSO_ESP)
10817
10818         if (adapter->ipsec)
10819                 netdev->features |= IXGBE_ESP_FEATURES;
10820 #endif
10821         /* copy netdev features into list of user selectable features */
10822         netdev->hw_features |= netdev->features |
10823                                NETIF_F_HW_VLAN_CTAG_FILTER |
10824                                NETIF_F_HW_VLAN_CTAG_RX |
10825                                NETIF_F_HW_VLAN_CTAG_TX |
10826                                NETIF_F_RXALL |
10827                                NETIF_F_HW_L2FW_DOFFLOAD;
10828
10829         if (hw->mac.type >= ixgbe_mac_82599EB)
10830                 netdev->hw_features |= NETIF_F_NTUPLE |
10831                                        NETIF_F_HW_TC;
10832
10833         if (pci_using_dac)
10834                 netdev->features |= NETIF_F_HIGHDMA;
10835
10836         netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
10837         netdev->hw_enc_features |= netdev->vlan_features;
10838         netdev->mpls_features |= NETIF_F_SG |
10839                                  NETIF_F_TSO |
10840                                  NETIF_F_TSO6 |
10841                                  NETIF_F_HW_CSUM;
10842         netdev->mpls_features |= IXGBE_GSO_PARTIAL_FEATURES;
10843
10844         /* set this bit last since it cannot be part of vlan_features */
10845         netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
10846                             NETIF_F_HW_VLAN_CTAG_RX |
10847                             NETIF_F_HW_VLAN_CTAG_TX;
10848
10849         netdev->priv_flags |= IFF_UNICAST_FLT;
10850         netdev->priv_flags |= IFF_SUPP_NOFCS;
10851
10852         /* MTU range: 68 - 9710 */
10853         netdev->min_mtu = ETH_MIN_MTU;
10854         netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN);
10855
10856 #ifdef CONFIG_IXGBE_DCB
10857         if (adapter->flags & IXGBE_FLAG_DCB_CAPABLE)
10858                 netdev->dcbnl_ops = &ixgbe_dcbnl_ops;
10859 #endif
10860
10861 #ifdef IXGBE_FCOE
10862         if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
10863                 unsigned int fcoe_l;
10864
10865                 if (hw->mac.ops.get_device_caps) {
10866                         hw->mac.ops.get_device_caps(hw, &device_caps);
10867                         if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
10868                                 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
10869                 }
10870
10871
10872                 fcoe_l = min_t(int, IXGBE_FCRETA_SIZE, num_online_cpus());
10873                 adapter->ring_feature[RING_F_FCOE].limit = fcoe_l;
10874
10875                 netdev->features |= NETIF_F_FSO |
10876                                     NETIF_F_FCOE_CRC;
10877
10878                 netdev->vlan_features |= NETIF_F_FSO |
10879                                          NETIF_F_FCOE_CRC |
10880                                          NETIF_F_FCOE_MTU;
10881         }
10882 #endif /* IXGBE_FCOE */
10883         if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
10884                 netdev->hw_features |= NETIF_F_LRO;
10885         if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
10886                 netdev->features |= NETIF_F_LRO;
10887
10888         if (ixgbe_check_fw_error(adapter)) {
10889                 err = -EIO;
10890                 goto err_sw_init;
10891         }
10892
10893         /* make sure the EEPROM is good */
10894         if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
10895                 e_dev_err("The EEPROM Checksum Is Not Valid\n");
10896                 err = -EIO;
10897                 goto err_sw_init;
10898         }
10899
10900         eth_platform_get_mac_address(&adapter->pdev->dev,
10901                                      adapter->hw.mac.perm_addr);
10902
10903         memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
10904
10905         if (!is_valid_ether_addr(netdev->dev_addr)) {
10906                 e_dev_err("invalid MAC address\n");
10907                 err = -EIO;
10908                 goto err_sw_init;
10909         }
10910
10911         /* Set hw->mac.addr to permanent MAC address */
10912         ether_addr_copy(hw->mac.addr, hw->mac.perm_addr);
10913         ixgbe_mac_set_default_filter(adapter);
10914
10915         timer_setup(&adapter->service_timer, ixgbe_service_timer, 0);
10916
10917         if (ixgbe_removed(hw->hw_addr)) {
10918                 err = -EIO;
10919                 goto err_sw_init;
10920         }
10921         INIT_WORK(&adapter->service_task, ixgbe_service_task);
10922         set_bit(__IXGBE_SERVICE_INITED, &adapter->state);
10923         clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
10924
10925         err = ixgbe_init_interrupt_scheme(adapter);
10926         if (err)
10927                 goto err_sw_init;
10928
10929         for (i = 0; i < adapter->num_rx_queues; i++)
10930                 u64_stats_init(&adapter->rx_ring[i]->syncp);
10931         for (i = 0; i < adapter->num_tx_queues; i++)
10932                 u64_stats_init(&adapter->tx_ring[i]->syncp);
10933         for (i = 0; i < adapter->num_xdp_queues; i++)
10934                 u64_stats_init(&adapter->xdp_ring[i]->syncp);
10935
10936         /* WOL not supported for all devices */
10937         adapter->wol = 0;
10938         hw->eeprom.ops.read(hw, 0x2c, &adapter->eeprom_cap);
10939         hw->wol_enabled = ixgbe_wol_supported(adapter, pdev->device,
10940                                                 pdev->subsystem_device);
10941         if (hw->wol_enabled)
10942                 adapter->wol = IXGBE_WUFC_MAG;
10943
10944         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
10945
10946         /* save off EEPROM version number */
10947         ixgbe_set_fw_version(adapter);
10948
10949         /* pick up the PCI bus settings for reporting later */
10950         if (ixgbe_pcie_from_parent(hw))
10951                 ixgbe_get_parent_bus_info(adapter);
10952         else
10953                  hw->mac.ops.get_bus_info(hw);
10954
10955         /* calculate the expected PCIe bandwidth required for optimal
10956          * performance. Note that some older parts will never have enough
10957          * bandwidth due to being older generation PCIe parts. We clamp these
10958          * parts to ensure no warning is displayed if it can't be fixed.
10959          */
10960         switch (hw->mac.type) {
10961         case ixgbe_mac_82598EB:
10962                 expected_gts = min(ixgbe_enumerate_functions(adapter) * 10, 16);
10963                 break;
10964         default:
10965                 expected_gts = ixgbe_enumerate_functions(adapter) * 10;
10966                 break;
10967         }
10968
10969         /* don't check link if we failed to enumerate functions */
10970         if (expected_gts > 0)
10971                 ixgbe_check_minimum_link(adapter, expected_gts);
10972
10973         err = ixgbe_read_pba_string_generic(hw, part_str, sizeof(part_str));
10974         if (err)
10975                 strlcpy(part_str, "Unknown", sizeof(part_str));
10976         if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
10977                 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, PBA No: %s\n",
10978                            hw->mac.type, hw->phy.type, hw->phy.sfp_type,
10979                            part_str);
10980         else
10981                 e_dev_info("MAC: %d, PHY: %d, PBA No: %s\n",
10982                            hw->mac.type, hw->phy.type, part_str);
10983
10984         e_dev_info("%pM\n", netdev->dev_addr);
10985
10986         /* reset the hardware with the new settings */
10987         err = hw->mac.ops.start_hw(hw);
10988         if (err == IXGBE_ERR_EEPROM_VERSION) {
10989                 /* We are running on a pre-production device, log a warning */
10990                 e_dev_warn("This device is a pre-production adapter/LOM. "
10991                            "Please be aware there may be issues associated "
10992                            "with your hardware.  If you are experiencing "
10993                            "problems please contact your Intel or hardware "
10994                            "representative who provided you with this "
10995                            "hardware.\n");
10996         }
10997         strcpy(netdev->name, "eth%d");
10998         pci_set_drvdata(pdev, adapter);
10999         err = register_netdev(netdev);
11000         if (err)
11001                 goto err_register;
11002
11003
11004         /* power down the optics for 82599 SFP+ fiber */
11005         if (hw->mac.ops.disable_tx_laser)
11006                 hw->mac.ops.disable_tx_laser(hw);
11007
11008         /* carrier off reporting is important to ethtool even BEFORE open */
11009         netif_carrier_off(netdev);
11010
11011 #ifdef CONFIG_IXGBE_DCA
11012         if (dca_add_requester(&pdev->dev) == 0) {
11013                 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
11014                 ixgbe_setup_dca(adapter);
11015         }
11016 #endif
11017         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
11018                 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
11019                 for (i = 0; i < adapter->num_vfs; i++)
11020                         ixgbe_vf_configuration(pdev, (i | 0x10000000));
11021         }
11022
11023         /* firmware requires driver version to be 0xFFFFFFFF
11024          * since os does not support feature
11025          */
11026         if (hw->mac.ops.set_fw_drv_ver)
11027                 hw->mac.ops.set_fw_drv_ver(hw, 0xFF, 0xFF, 0xFF, 0xFF,
11028                                            sizeof(UTS_RELEASE) - 1,
11029                                            UTS_RELEASE);
11030
11031         /* add san mac addr to netdev */
11032         ixgbe_add_sanmac_netdev(netdev);
11033
11034         e_dev_info("%s\n", ixgbe_default_device_descr);
11035
11036 #ifdef CONFIG_IXGBE_HWMON
11037         if (ixgbe_sysfs_init(adapter))
11038                 e_err(probe, "failed to allocate sysfs resources\n");
11039 #endif /* CONFIG_IXGBE_HWMON */
11040
11041         ixgbe_dbg_adapter_init(adapter);
11042
11043         /* setup link for SFP devices with MNG FW, else wait for IXGBE_UP */
11044         if (ixgbe_mng_enabled(hw) && ixgbe_is_sfp(hw) && hw->mac.ops.setup_link)
11045                 hw->mac.ops.setup_link(hw,
11046                         IXGBE_LINK_SPEED_10GB_FULL | IXGBE_LINK_SPEED_1GB_FULL,
11047                         true);
11048
11049         err = ixgbe_mii_bus_init(hw);
11050         if (err)
11051                 goto err_netdev;
11052
11053         return 0;
11054
11055 err_netdev:
11056         unregister_netdev(netdev);
11057 err_register:
11058         ixgbe_release_hw_control(adapter);
11059         ixgbe_clear_interrupt_scheme(adapter);
11060 err_sw_init:
11061         ixgbe_disable_sriov(adapter);
11062         adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
11063         iounmap(adapter->io_addr);
11064         kfree(adapter->jump_tables[0]);
11065         kfree(adapter->mac_table);
11066         kfree(adapter->rss_key);
11067         bitmap_free(adapter->af_xdp_zc_qps);
11068 err_ioremap:
11069         disable_dev = !test_and_set_bit(__IXGBE_DISABLED, &adapter->state);
11070         free_netdev(netdev);
11071 err_alloc_etherdev:
11072         pci_release_mem_regions(pdev);
11073 err_pci_reg:
11074 err_dma:
11075         if (!adapter || disable_dev)
11076                 pci_disable_device(pdev);
11077         return err;
11078 }
11079
11080 /**
11081  * ixgbe_remove - Device Removal Routine
11082  * @pdev: PCI device information struct
11083  *
11084  * ixgbe_remove is called by the PCI subsystem to alert the driver
11085  * that it should release a PCI device.  The could be caused by a
11086  * Hot-Plug event, or because the driver is going to be removed from
11087  * memory.
11088  **/
11089 static void ixgbe_remove(struct pci_dev *pdev)
11090 {
11091         struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
11092         struct net_device *netdev;
11093         bool disable_dev;
11094         int i;
11095
11096         /* if !adapter then we already cleaned up in probe */
11097         if (!adapter)
11098                 return;
11099
11100         netdev  = adapter->netdev;
11101         ixgbe_dbg_adapter_exit(adapter);
11102
11103         set_bit(__IXGBE_REMOVING, &adapter->state);
11104         cancel_work_sync(&adapter->service_task);
11105
11106         if (adapter->mii_bus)
11107                 mdiobus_unregister(adapter->mii_bus);
11108
11109 #ifdef CONFIG_IXGBE_DCA
11110         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
11111                 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
11112                 dca_remove_requester(&pdev->dev);
11113                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
11114                                 IXGBE_DCA_CTRL_DCA_DISABLE);
11115         }
11116
11117 #endif
11118 #ifdef CONFIG_IXGBE_HWMON
11119         ixgbe_sysfs_exit(adapter);
11120 #endif /* CONFIG_IXGBE_HWMON */
11121
11122         /* remove the added san mac */
11123         ixgbe_del_sanmac_netdev(netdev);
11124
11125 #ifdef CONFIG_PCI_IOV
11126         ixgbe_disable_sriov(adapter);
11127 #endif
11128         if (netdev->reg_state == NETREG_REGISTERED)
11129                 unregister_netdev(netdev);
11130
11131         ixgbe_stop_ipsec_offload(adapter);
11132         ixgbe_clear_interrupt_scheme(adapter);
11133
11134         ixgbe_release_hw_control(adapter);
11135
11136 #ifdef CONFIG_DCB
11137         kfree(adapter->ixgbe_ieee_pfc);
11138         kfree(adapter->ixgbe_ieee_ets);
11139
11140 #endif
11141         iounmap(adapter->io_addr);
11142         pci_release_mem_regions(pdev);
11143
11144         e_dev_info("complete\n");
11145
11146         for (i = 0; i < IXGBE_MAX_LINK_HANDLE; i++) {
11147                 if (adapter->jump_tables[i]) {
11148                         kfree(adapter->jump_tables[i]->input);
11149                         kfree(adapter->jump_tables[i]->mask);
11150                 }
11151                 kfree(adapter->jump_tables[i]);
11152         }
11153
11154         kfree(adapter->mac_table);
11155         kfree(adapter->rss_key);
11156         bitmap_free(adapter->af_xdp_zc_qps);
11157         disable_dev = !test_and_set_bit(__IXGBE_DISABLED, &adapter->state);
11158         free_netdev(netdev);
11159
11160         pci_disable_pcie_error_reporting(pdev);
11161
11162         if (disable_dev)
11163                 pci_disable_device(pdev);
11164 }
11165
11166 /**
11167  * ixgbe_io_error_detected - called when PCI error is detected
11168  * @pdev: Pointer to PCI device
11169  * @state: The current pci connection state
11170  *
11171  * This function is called after a PCI bus error affecting
11172  * this device has been detected.
11173  */
11174 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
11175                                                 pci_channel_state_t state)
11176 {
11177         struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
11178         struct net_device *netdev = adapter->netdev;
11179
11180 #ifdef CONFIG_PCI_IOV
11181         struct ixgbe_hw *hw = &adapter->hw;
11182         struct pci_dev *bdev, *vfdev;
11183         u32 dw0, dw1, dw2, dw3;
11184         int vf, pos;
11185         u16 req_id, pf_func;
11186
11187         if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
11188             adapter->num_vfs == 0)
11189                 goto skip_bad_vf_detection;
11190
11191         bdev = pdev->bus->self;
11192         while (bdev && (pci_pcie_type(bdev) != PCI_EXP_TYPE_ROOT_PORT))
11193                 bdev = bdev->bus->self;
11194
11195         if (!bdev)
11196                 goto skip_bad_vf_detection;
11197
11198         pos = pci_find_ext_capability(bdev, PCI_EXT_CAP_ID_ERR);
11199         if (!pos)
11200                 goto skip_bad_vf_detection;
11201
11202         dw0 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG);
11203         dw1 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 4);
11204         dw2 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 8);
11205         dw3 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 12);
11206         if (ixgbe_removed(hw->hw_addr))
11207                 goto skip_bad_vf_detection;
11208
11209         req_id = dw1 >> 16;
11210         /* On the 82599 if bit 7 of the requestor ID is set then it's a VF */
11211         if (!(req_id & 0x0080))
11212                 goto skip_bad_vf_detection;
11213
11214         pf_func = req_id & 0x01;
11215         if ((pf_func & 1) == (pdev->devfn & 1)) {
11216                 unsigned int device_id;
11217
11218                 vf = (req_id & 0x7F) >> 1;
11219                 e_dev_err("VF %d has caused a PCIe error\n", vf);
11220                 e_dev_err("TLP: dw0: %8.8x\tdw1: %8.8x\tdw2: "
11221                                 "%8.8x\tdw3: %8.8x\n",
11222                 dw0, dw1, dw2, dw3);
11223                 switch (adapter->hw.mac.type) {
11224                 case ixgbe_mac_82599EB:
11225                         device_id = IXGBE_82599_VF_DEVICE_ID;
11226                         break;
11227                 case ixgbe_mac_X540:
11228                         device_id = IXGBE_X540_VF_DEVICE_ID;
11229                         break;
11230                 case ixgbe_mac_X550:
11231                         device_id = IXGBE_DEV_ID_X550_VF;
11232                         break;
11233                 case ixgbe_mac_X550EM_x:
11234                         device_id = IXGBE_DEV_ID_X550EM_X_VF;
11235                         break;
11236                 case ixgbe_mac_x550em_a:
11237                         device_id = IXGBE_DEV_ID_X550EM_A_VF;
11238                         break;
11239                 default:
11240                         device_id = 0;
11241                         break;
11242                 }
11243
11244                 /* Find the pci device of the offending VF */
11245                 vfdev = pci_get_device(PCI_VENDOR_ID_INTEL, device_id, NULL);
11246                 while (vfdev) {
11247                         if (vfdev->devfn == (req_id & 0xFF))
11248                                 break;
11249                         vfdev = pci_get_device(PCI_VENDOR_ID_INTEL,
11250                                                device_id, vfdev);
11251                 }
11252                 /*
11253                  * There's a slim chance the VF could have been hot plugged,
11254                  * so if it is no longer present we don't need to issue the
11255                  * VFLR.  Just clean up the AER in that case.
11256                  */
11257                 if (vfdev) {
11258                         pcie_flr(vfdev);
11259                         /* Free device reference count */
11260                         pci_dev_put(vfdev);
11261                 }
11262         }
11263
11264         /*
11265          * Even though the error may have occurred on the other port
11266          * we still need to increment the vf error reference count for
11267          * both ports because the I/O resume function will be called
11268          * for both of them.
11269          */
11270         adapter->vferr_refcount++;
11271
11272         return PCI_ERS_RESULT_RECOVERED;
11273
11274 skip_bad_vf_detection:
11275 #endif /* CONFIG_PCI_IOV */
11276         if (!test_bit(__IXGBE_SERVICE_INITED, &adapter->state))
11277                 return PCI_ERS_RESULT_DISCONNECT;
11278
11279         if (!netif_device_present(netdev))
11280                 return PCI_ERS_RESULT_DISCONNECT;
11281
11282         rtnl_lock();
11283         netif_device_detach(netdev);
11284
11285         if (netif_running(netdev))
11286                 ixgbe_close_suspend(adapter);
11287
11288         if (state == pci_channel_io_perm_failure) {
11289                 rtnl_unlock();
11290                 return PCI_ERS_RESULT_DISCONNECT;
11291         }
11292
11293         if (!test_and_set_bit(__IXGBE_DISABLED, &adapter->state))
11294                 pci_disable_device(pdev);
11295         rtnl_unlock();
11296
11297         /* Request a slot reset. */
11298         return PCI_ERS_RESULT_NEED_RESET;
11299 }
11300
11301 /**
11302  * ixgbe_io_slot_reset - called after the pci bus has been reset.
11303  * @pdev: Pointer to PCI device
11304  *
11305  * Restart the card from scratch, as if from a cold-boot.
11306  */
11307 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
11308 {
11309         struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
11310         pci_ers_result_t result;
11311
11312         if (pci_enable_device_mem(pdev)) {
11313                 e_err(probe, "Cannot re-enable PCI device after reset.\n");
11314                 result = PCI_ERS_RESULT_DISCONNECT;
11315         } else {
11316                 smp_mb__before_atomic();
11317                 clear_bit(__IXGBE_DISABLED, &adapter->state);
11318                 adapter->hw.hw_addr = adapter->io_addr;
11319                 pci_set_master(pdev);
11320                 pci_restore_state(pdev);
11321                 pci_save_state(pdev);
11322
11323                 pci_wake_from_d3(pdev, false);
11324
11325                 ixgbe_reset(adapter);
11326                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
11327                 result = PCI_ERS_RESULT_RECOVERED;
11328         }
11329
11330         return result;
11331 }
11332
11333 /**
11334  * ixgbe_io_resume - called when traffic can start flowing again.
11335  * @pdev: Pointer to PCI device
11336  *
11337  * This callback is called when the error recovery driver tells us that
11338  * its OK to resume normal operation.
11339  */
11340 static void ixgbe_io_resume(struct pci_dev *pdev)
11341 {
11342         struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
11343         struct net_device *netdev = adapter->netdev;
11344
11345 #ifdef CONFIG_PCI_IOV
11346         if (adapter->vferr_refcount) {
11347                 e_info(drv, "Resuming after VF err\n");
11348                 adapter->vferr_refcount--;
11349                 return;
11350         }
11351
11352 #endif
11353         rtnl_lock();
11354         if (netif_running(netdev))
11355                 ixgbe_open(netdev);
11356
11357         netif_device_attach(netdev);
11358         rtnl_unlock();
11359 }
11360
11361 static const struct pci_error_handlers ixgbe_err_handler = {
11362         .error_detected = ixgbe_io_error_detected,
11363         .slot_reset = ixgbe_io_slot_reset,
11364         .resume = ixgbe_io_resume,
11365 };
11366
11367 static SIMPLE_DEV_PM_OPS(ixgbe_pm_ops, ixgbe_suspend, ixgbe_resume);
11368
11369 static struct pci_driver ixgbe_driver = {
11370         .name      = ixgbe_driver_name,
11371         .id_table  = ixgbe_pci_tbl,
11372         .probe     = ixgbe_probe,
11373         .remove    = ixgbe_remove,
11374         .driver.pm = &ixgbe_pm_ops,
11375         .shutdown  = ixgbe_shutdown,
11376         .sriov_configure = ixgbe_pci_sriov_configure,
11377         .err_handler = &ixgbe_err_handler
11378 };
11379
11380 /**
11381  * ixgbe_init_module - Driver Registration Routine
11382  *
11383  * ixgbe_init_module is the first routine called when the driver is
11384  * loaded. All it does is register with the PCI subsystem.
11385  **/
11386 static int __init ixgbe_init_module(void)
11387 {
11388         int ret;
11389         pr_info("%s\n", ixgbe_driver_string);
11390         pr_info("%s\n", ixgbe_copyright);
11391
11392         ixgbe_wq = create_singlethread_workqueue(ixgbe_driver_name);
11393         if (!ixgbe_wq) {
11394                 pr_err("%s: Failed to create workqueue\n", ixgbe_driver_name);
11395                 return -ENOMEM;
11396         }
11397
11398         ixgbe_dbg_init();
11399
11400         ret = pci_register_driver(&ixgbe_driver);
11401         if (ret) {
11402                 destroy_workqueue(ixgbe_wq);
11403                 ixgbe_dbg_exit();
11404                 return ret;
11405         }
11406
11407 #ifdef CONFIG_IXGBE_DCA
11408         dca_register_notify(&dca_notifier);
11409 #endif
11410
11411         return 0;
11412 }
11413
11414 module_init(ixgbe_init_module);
11415
11416 /**
11417  * ixgbe_exit_module - Driver Exit Cleanup Routine
11418  *
11419  * ixgbe_exit_module is called just before the driver is removed
11420  * from memory.
11421  **/
11422 static void __exit ixgbe_exit_module(void)
11423 {
11424 #ifdef CONFIG_IXGBE_DCA
11425         dca_unregister_notify(&dca_notifier);
11426 #endif
11427         pci_unregister_driver(&ixgbe_driver);
11428
11429         ixgbe_dbg_exit();
11430         if (ixgbe_wq) {
11431                 destroy_workqueue(ixgbe_wq);
11432                 ixgbe_wq = NULL;
11433         }
11434 }
11435
11436 #ifdef CONFIG_IXGBE_DCA
11437 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
11438                             void *p)
11439 {
11440         int ret_val;
11441
11442         ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
11443                                          __ixgbe_notify_dca);
11444
11445         return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
11446 }
11447
11448 #endif /* CONFIG_IXGBE_DCA */
11449
11450 module_exit(ixgbe_exit_module);
11451
11452 /* ixgbe_main.c */