drivers/staging/octeon/ethernet.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * This file is based on code from OCTEON SDK by Cavium Networks.
   4  *
   5  * Copyright (c) 2003-2007 Cavium Networks
   6  */
   7
   8 #include <linux/platform_device.h>
   9 #include <linux/kernel.h>
  10 #include <linux/module.h>
  11 #include <linux/netdevice.h>
  12 #include <linux/etherdevice.h>
  13 #include <linux/phy.h>
  14 #include <linux/slab.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/of_mdio.h>
  17 #include <linux/of_net.h>
  18 #include <linux/if_ether.h>
  19 #include <linux/if_vlan.h>
  20
  21 #include <net/dst.h>
  22
  23 #include "octeon-ethernet.h"
  24 #include "ethernet-defines.h"
  25 #include "ethernet-mem.h"
  26 #include "ethernet-rx.h"
  27 #include "ethernet-tx.h"
  28 #include "ethernet-mdio.h"
  29 #include "ethernet-util.h"
  30
  31 #define OCTEON_MAX_MTU 65392
  32
  33 static int num_packet_buffers = 1024;
  34 module_param(num_packet_buffers, int, 0444);
  35 MODULE_PARM_DESC(num_packet_buffers, "\n"
  36         "\tNumber of packet buffers to allocate and store in the\n"
  37         "\tFPA. By default, 1024 packet buffers are used.\n");
  38
  39 static int pow_receive_group = 15;
  40 module_param(pow_receive_group, int, 0444);
  41 MODULE_PARM_DESC(pow_receive_group, "\n"
  42         "\tPOW group to receive packets from. All ethernet hardware\n"
  43         "\twill be configured to send incoming packets to this POW\n"
  44         "\tgroup. Also any other software can submit packets to this\n"
  45         "\tgroup for the kernel to process.");
  46
  47 static int receive_group_order;
  48 module_param(receive_group_order, int, 0444);
  49 MODULE_PARM_DESC(receive_group_order, "\n"
  50         "\tOrder (0..4) of receive groups to take into use. Ethernet hardware\n"
  51         "\twill be configured to send incoming packets to multiple POW\n"
  52         "\tgroups. pow_receive_group parameter is ignored when multiple\n"
  53         "\tgroups are taken into use and groups are allocated starting\n"
  54         "\tfrom 0. By default, a single group is used.\n");
  55
  56 int pow_send_group = -1;
  57 module_param(pow_send_group, int, 0644);
  58 MODULE_PARM_DESC(pow_send_group, "\n"
  59         "\tPOW group to send packets to other software on. This\n"
  60         "\tcontrols the creation of the virtual device pow0.\n"
  61         "\talways_use_pow also depends on this value.");
  62
  63 int always_use_pow;
  64 module_param(always_use_pow, int, 0444);
  65 MODULE_PARM_DESC(always_use_pow, "\n"
  66         "\tWhen set, always send to the pow group. This will cause\n"
  67         "\tpackets sent to real ethernet devices to be sent to the\n"
  68         "\tPOW group instead of the hardware. Unless some other\n"
  69         "\tapplication changes the config, packets will still be\n"
  70         "\treceived from the low level hardware. Use this option\n"
  71         "\tto allow a CVMX app to intercept all packets from the\n"
  72         "\tlinux kernel. You must specify pow_send_group along with\n"
  73         "\tthis option.");
  74
  75 char pow_send_list[128] = "";
  76 module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444);
  77 MODULE_PARM_DESC(pow_send_list, "\n"
  78         "\tComma separated list of ethernet devices that should use the\n"
  79         "\tPOW for transmit instead of the actual ethernet hardware. This\n"
  80         "\tis a per port version of always_use_pow. always_use_pow takes\n"
  81         "\tprecedence over this list. For example, setting this to\n"
  82         "\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n"
  83         "\tusing the pow_send_group.");
  84
  85 int rx_napi_weight = 32;
  86 module_param(rx_napi_weight, int, 0444);
  87 MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter.");
  88
  89 /* Mask indicating which receive groups are in use. */
  90 int pow_receive_groups;
  91
  92 /*
  93  * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
  94  *
  95  * Set to one right before cvm_oct_poll_queue is destroyed.
  96  */
  97 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
  98
  99 /*
 100  * Array of every ethernet device owned by this driver indexed by
 101  * the ipd input port number.
 102  */
 103 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
 104
 105 u64 cvm_oct_tx_poll_interval;
 106
 107 static void cvm_oct_rx_refill_worker(struct work_struct *work);
 108 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
 109
 110 static void cvm_oct_rx_refill_worker(struct work_struct *work)
 111 {
 112         /*
 113          * FPA 0 may have been drained, try to refill it if we need
 114          * more than num_packet_buffers / 2, otherwise normal receive
 115          * processing will refill it.  If it were drained, no packets
 116          * could be received so cvm_oct_napi_poll would never be
 117          * invoked to do the refill.
 118          */
 119         cvm_oct_rx_refill_pool(num_packet_buffers / 2);
 120
 121         if (!atomic_read(&cvm_oct_poll_queue_stopping))
 122                 schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 123 }
 124
 125 static void cvm_oct_periodic_worker(struct work_struct *work)
 126 {
 127         struct octeon_ethernet *priv = container_of(work,
 128                                                     struct octeon_ethernet,
 129                                                     port_periodic_work.work);
 130
 131         if (priv->poll)
 132                 priv->poll(cvm_oct_device[priv->port]);
 133
 134         cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats
 135                                                 (cvm_oct_device[priv->port]);
 136
 137         if (!atomic_read(&cvm_oct_poll_queue_stopping))
 138                 schedule_delayed_work(&priv->port_periodic_work, HZ);
 139 }
 140
 141 static void cvm_oct_configure_common_hw(void)
 142 {
 143         /* Setup the FPA */
 144         cvmx_fpa_enable();
 145         cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 146                              num_packet_buffers);
 147         cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 148                              num_packet_buffers);
 149         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 150                 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 151                                      CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 1024);
 152
 153 #ifdef __LITTLE_ENDIAN
 154         {
 155                 union cvmx_ipd_ctl_status ipd_ctl_status;
 156
 157                 ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 158                 ipd_ctl_status.s.pkt_lend = 1;
 159                 ipd_ctl_status.s.wqe_lend = 1;
 160                 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
 161         }
 162 #endif
 163
 164         cvmx_helper_setup_red(num_packet_buffers / 4, num_packet_buffers / 8);
 165 }
 166
 167 /**
 168  * cvm_oct_free_work- Free a work queue entry
 169  *
 170  * @work_queue_entry: Work queue entry to free
 171  *
 172  * Returns Zero on success, Negative on failure.
 173  */
 174 int cvm_oct_free_work(void *work_queue_entry)
 175 {
 176         struct cvmx_wqe *work = work_queue_entry;
 177
 178         int segments = work->word2.s.bufs;
 179         union cvmx_buf_ptr segment_ptr = work->packet_ptr;
 180
 181         while (segments--) {
 182                 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
 183                         cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
 184                 if (unlikely(!segment_ptr.s.i))
 185                         cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
 186                                       segment_ptr.s.pool,
 187                                       CVMX_FPA_PACKET_POOL_SIZE / 128);
 188                 segment_ptr = next_ptr;
 189         }
 190         cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, 1);
 191
 192         return 0;
 193 }
 194 EXPORT_SYMBOL(cvm_oct_free_work);
 195
 196 /**
 197  * cvm_oct_common_get_stats - get the low level ethernet statistics
 198  * @dev:    Device to get the statistics from
 199  *
 200  * Returns Pointer to the statistics
 201  */
 202 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
 203 {
 204         cvmx_pip_port_status_t rx_status;
 205         cvmx_pko_port_status_t tx_status;
 206         struct octeon_ethernet *priv = netdev_priv(dev);
 207
 208         if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
 209                 if (octeon_is_simulation()) {
 210                         /* The simulator doesn't support statistics */
 211                         memset(&rx_status, 0, sizeof(rx_status));
 212                         memset(&tx_status, 0, sizeof(tx_status));
 213                 } else {
 214                         cvmx_pip_get_port_status(priv->port, 1, &rx_status);
 215                         cvmx_pko_get_port_status(priv->port, 1, &tx_status);
 216                 }
 217
 218                 dev->stats.rx_packets += rx_status.inb_packets;
 219                 dev->stats.tx_packets += tx_status.packets;
 220                 dev->stats.rx_bytes += rx_status.inb_octets;
 221                 dev->stats.tx_bytes += tx_status.octets;
 222                 dev->stats.multicast += rx_status.multicast_packets;
 223                 dev->stats.rx_crc_errors += rx_status.inb_errors;
 224                 dev->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
 225                 dev->stats.rx_dropped += rx_status.dropped_packets;
 226         }
 227
 228         return &dev->stats;
 229 }
 230
 231 /**
 232  * cvm_oct_common_change_mtu - change the link MTU
 233  * @dev:     Device to change
 234  * @new_mtu: The new MTU
 235  *
 236  * Returns Zero on success
 237  */
 238 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
 239 {
 240         struct octeon_ethernet *priv = netdev_priv(dev);
 241         int interface = INTERFACE(priv->port);
 242 #if IS_ENABLED(CONFIG_VLAN_8021Q)
 243         int vlan_bytes = VLAN_HLEN;
 244 #else
 245         int vlan_bytes = 0;
 246 #endif
 247         int mtu_overhead = ETH_HLEN + ETH_FCS_LEN + vlan_bytes;
 248
 249         dev->mtu = new_mtu;
 250
 251         if ((interface < 2) &&
 252             (cvmx_helper_interface_get_mode(interface) !=
 253                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 254                 int index = INDEX(priv->port);
 255                 /* Add ethernet header and FCS, and VLAN if configured. */
 256                 int max_packet = new_mtu + mtu_overhead;
 257
 258                 if (OCTEON_IS_MODEL(OCTEON_CN3XXX) ||
 259                     OCTEON_IS_MODEL(OCTEON_CN58XX)) {
 260                         /* Signal errors on packets larger than the MTU */
 261                         cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
 262                                        max_packet);
 263                 } else {
 264                         /*
 265                          * Set the hardware to truncate packets larger
 266                          * than the MTU and smaller the 64 bytes.
 267                          */
 268                         union cvmx_pip_frm_len_chkx frm_len_chk;
 269
 270                         frm_len_chk.u64 = 0;
 271                         frm_len_chk.s.minlen = VLAN_ETH_ZLEN;
 272                         frm_len_chk.s.maxlen = max_packet;
 273                         cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
 274                                        frm_len_chk.u64);
 275                 }
 276                 /*
 277                  * Set the hardware to truncate packets larger than
 278                  * the MTU. The jabber register must be set to a
 279                  * multiple of 8 bytes, so round up.
 280                  */
 281                 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
 282                                (max_packet + 7) & ~7u);
 283         }
 284         return 0;
 285 }
 286
 287 /**
 288  * cvm_oct_common_set_multicast_list - set the multicast list
 289  * @dev:    Device to work on
 290  */
 291 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
 292 {
 293         union cvmx_gmxx_prtx_cfg gmx_cfg;
 294         struct octeon_ethernet *priv = netdev_priv(dev);
 295         int interface = INTERFACE(priv->port);
 296
 297         if ((interface < 2) &&
 298             (cvmx_helper_interface_get_mode(interface) !=
 299                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 300                 union cvmx_gmxx_rxx_adr_ctl control;
 301                 int index = INDEX(priv->port);
 302
 303                 control.u64 = 0;
 304                 control.s.bcst = 1;     /* Allow broadcast MAC addresses */
 305
 306                 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
 307                     (dev->flags & IFF_PROMISC))
 308                         /* Force accept multicast packets */
 309                         control.s.mcst = 2;
 310                 else
 311                         /* Force reject multicast packets */
 312                         control.s.mcst = 1;
 313
 314                 if (dev->flags & IFF_PROMISC)
 315                         /*
 316                          * Reject matches if promisc. Since CAM is
 317                          * shut off, should accept everything.
 318                          */
 319                         control.s.cam_mode = 0;
 320                 else
 321                         /* Filter packets based on the CAM */
 322                         control.s.cam_mode = 1;
 323
 324                 gmx_cfg.u64 =
 325                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 326                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 327                                gmx_cfg.u64 & ~1ull);
 328
 329                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
 330                                control.u64);
 331                 if (dev->flags & IFF_PROMISC)
 332                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 333                                        (index, interface), 0);
 334                 else
 335                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 336                                        (index, interface), 1);
 337
 338                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 339                                gmx_cfg.u64);
 340         }
 341 }
 342
 343 static int cvm_oct_set_mac_filter(struct net_device *dev)
 344 {
 345         struct octeon_ethernet *priv = netdev_priv(dev);
 346         union cvmx_gmxx_prtx_cfg gmx_cfg;
 347         int interface = INTERFACE(priv->port);
 348
 349         if ((interface < 2) &&
 350             (cvmx_helper_interface_get_mode(interface) !=
 351                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 352                 int i;
 353                 u8 *ptr = dev->dev_addr;
 354                 u64 mac = 0;
 355                 int index = INDEX(priv->port);
 356
 357                 for (i = 0; i < 6; i++)
 358                         mac = (mac << 8) | (u64)ptr[i];
 359
 360                 gmx_cfg.u64 =
 361                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 362                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 363                                gmx_cfg.u64 & ~1ull);
 364
 365                 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
 366                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
 367                                ptr[0]);
 368                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
 369                                ptr[1]);
 370                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
 371                                ptr[2]);
 372                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
 373                                ptr[3]);
 374                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
 375                                ptr[4]);
 376                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
 377                                ptr[5]);
 378                 cvm_oct_common_set_multicast_list(dev);
 379                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 380                                gmx_cfg.u64);
 381         }
 382         return 0;
 383 }
 384
 385 /**
 386  * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
 387  * @dev:    The device in question.
 388  * @addr:   Socket address.
 389  *
 390  * Returns Zero on success
 391  */
 392 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
 393 {
 394         int r = eth_mac_addr(dev, addr);
 395
 396         if (r)
 397                 return r;
 398         return cvm_oct_set_mac_filter(dev);
 399 }
 400
 401 /**
 402  * cvm_oct_common_init - per network device initialization
 403  * @dev:    Device to initialize
 404  *
 405  * Returns Zero on success
 406  */
 407 int cvm_oct_common_init(struct net_device *dev)
 408 {
 409         struct octeon_ethernet *priv = netdev_priv(dev);
 410         const u8 *mac = NULL;
 411
 412         if (priv->of_node)
 413                 mac = of_get_mac_address(priv->of_node);
 414
 415         if (!IS_ERR_OR_NULL(mac))
 416                 ether_addr_copy(dev->dev_addr, mac);
 417         else
 418                 eth_hw_addr_random(dev);
 419
 420         /*
 421          * Force the interface to use the POW send if always_use_pow
 422          * was specified or it is in the pow send list.
 423          */
 424         if ((pow_send_group != -1) &&
 425             (always_use_pow || strstr(pow_send_list, dev->name)))
 426                 priv->queue = -1;
 427
 428         if (priv->queue != -1)
 429                 dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
 430
 431         /* We do our own locking, Linux doesn't need to */
 432         dev->features |= NETIF_F_LLTX;
 433         dev->ethtool_ops = &cvm_oct_ethtool_ops;
 434
 435         cvm_oct_set_mac_filter(dev);
 436         dev_set_mtu(dev, dev->mtu);
 437
 438         /*
 439          * Zero out stats for port so we won't mistakenly show
 440          * counters from the bootloader.
 441          */
 442         memset(dev->netdev_ops->ndo_get_stats(dev), 0,
 443                sizeof(struct net_device_stats));
 444
 445         if (dev->netdev_ops->ndo_stop)
 446                 dev->netdev_ops->ndo_stop(dev);
 447
 448         return 0;
 449 }
 450
 451 void cvm_oct_common_uninit(struct net_device *dev)
 452 {
 453         if (dev->phydev)
 454                 phy_disconnect(dev->phydev);
 455 }
 456
 457 int cvm_oct_common_open(struct net_device *dev,
 458                         void (*link_poll)(struct net_device *))
 459 {
 460         union cvmx_gmxx_prtx_cfg gmx_cfg;
 461         struct octeon_ethernet *priv = netdev_priv(dev);
 462         int interface = INTERFACE(priv->port);
 463         int index = INDEX(priv->port);
 464         union cvmx_helper_link_info link_info;
 465         int rv;
 466
 467         rv = cvm_oct_phy_setup_device(dev);
 468         if (rv)
 469                 return rv;
 470
 471         gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 472         gmx_cfg.s.en = 1;
 473         if (octeon_has_feature(OCTEON_FEATURE_PKND))
 474                 gmx_cfg.s.pknd = priv->port;
 475         cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
 476
 477         if (octeon_is_simulation())
 478                 return 0;
 479
 480         if (dev->phydev) {
 481                 int r = phy_read_status(dev->phydev);
 482
 483                 if (r == 0 && dev->phydev->link == 0)
 484                         netif_carrier_off(dev);
 485                 cvm_oct_adjust_link(dev);
 486         } else {
 487                 link_info = cvmx_helper_link_get(priv->port);
 488                 if (!link_info.s.link_up)
 489                         netif_carrier_off(dev);
 490                 priv->poll = link_poll;
 491                 link_poll(dev);
 492         }
 493
 494         return 0;
 495 }
 496
 497 void cvm_oct_link_poll(struct net_device *dev)
 498 {
 499         struct octeon_ethernet *priv = netdev_priv(dev);
 500         union cvmx_helper_link_info link_info;
 501
 502         link_info = cvmx_helper_link_get(priv->port);
 503         if (link_info.u64 == priv->link_info)
 504                 return;
 505
 506         if (cvmx_helper_link_set(priv->port, link_info))
 507                 link_info.u64 = priv->link_info;
 508         else
 509                 priv->link_info = link_info.u64;
 510
 511         if (link_info.s.link_up) {
 512                 if (!netif_carrier_ok(dev))
 513                         netif_carrier_on(dev);
 514         } else if (netif_carrier_ok(dev)) {
 515                 netif_carrier_off(dev);
 516         }
 517         cvm_oct_note_carrier(priv, link_info);
 518 }
 519
 520 static int cvm_oct_xaui_open(struct net_device *dev)
 521 {
 522         return cvm_oct_common_open(dev, cvm_oct_link_poll);
 523 }
 524
 525 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
 526         .ndo_init               = cvm_oct_common_init,
 527         .ndo_uninit             = cvm_oct_common_uninit,
 528         .ndo_start_xmit         = cvm_oct_xmit,
 529         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 530         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 531         .ndo_do_ioctl           = cvm_oct_ioctl,
 532         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 533         .ndo_get_stats          = cvm_oct_common_get_stats,
 534 #ifdef CONFIG_NET_POLL_CONTROLLER
 535         .ndo_poll_controller    = cvm_oct_poll_controller,
 536 #endif
 537 };
 538
 539 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
 540         .ndo_init               = cvm_oct_common_init,
 541         .ndo_uninit             = cvm_oct_common_uninit,
 542         .ndo_open               = cvm_oct_xaui_open,
 543         .ndo_stop               = cvm_oct_common_stop,
 544         .ndo_start_xmit         = cvm_oct_xmit,
 545         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 546         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 547         .ndo_do_ioctl           = cvm_oct_ioctl,
 548         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 549         .ndo_get_stats          = cvm_oct_common_get_stats,
 550 #ifdef CONFIG_NET_POLL_CONTROLLER
 551         .ndo_poll_controller    = cvm_oct_poll_controller,
 552 #endif
 553 };
 554
 555 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
 556         .ndo_init               = cvm_oct_sgmii_init,
 557         .ndo_uninit             = cvm_oct_common_uninit,
 558         .ndo_open               = cvm_oct_sgmii_open,
 559         .ndo_stop               = cvm_oct_common_stop,
 560         .ndo_start_xmit         = cvm_oct_xmit,
 561         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 562         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 563         .ndo_do_ioctl           = cvm_oct_ioctl,
 564         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 565         .ndo_get_stats          = cvm_oct_common_get_stats,
 566 #ifdef CONFIG_NET_POLL_CONTROLLER
 567         .ndo_poll_controller    = cvm_oct_poll_controller,
 568 #endif
 569 };
 570
 571 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
 572         .ndo_init               = cvm_oct_spi_init,
 573         .ndo_uninit             = cvm_oct_spi_uninit,
 574         .ndo_start_xmit         = cvm_oct_xmit,
 575         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 576         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 577         .ndo_do_ioctl           = cvm_oct_ioctl,
 578         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 579         .ndo_get_stats          = cvm_oct_common_get_stats,
 580 #ifdef CONFIG_NET_POLL_CONTROLLER
 581         .ndo_poll_controller    = cvm_oct_poll_controller,
 582 #endif
 583 };
 584
 585 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
 586         .ndo_init               = cvm_oct_common_init,
 587         .ndo_uninit             = cvm_oct_common_uninit,
 588         .ndo_open               = cvm_oct_rgmii_open,
 589         .ndo_stop               = cvm_oct_common_stop,
 590         .ndo_start_xmit         = cvm_oct_xmit,
 591         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 592         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 593         .ndo_do_ioctl           = cvm_oct_ioctl,
 594         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 595         .ndo_get_stats          = cvm_oct_common_get_stats,
 596 #ifdef CONFIG_NET_POLL_CONTROLLER
 597         .ndo_poll_controller    = cvm_oct_poll_controller,
 598 #endif
 599 };
 600
 601 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
 602         .ndo_init               = cvm_oct_common_init,
 603         .ndo_start_xmit         = cvm_oct_xmit_pow,
 604         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 605         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 606         .ndo_do_ioctl           = cvm_oct_ioctl,
 607         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 608         .ndo_get_stats          = cvm_oct_common_get_stats,
 609 #ifdef CONFIG_NET_POLL_CONTROLLER
 610         .ndo_poll_controller    = cvm_oct_poll_controller,
 611 #endif
 612 };
 613
 614 static struct device_node *cvm_oct_of_get_child
 615                                 (const struct device_node *parent, int reg_val)
 616 {
 617         struct device_node *node;
 618         const __be32 *addr;
 619         int size;
 620
 621         for_each_child_of_node(parent, node) {
 622                 addr = of_get_property(node, "reg", &size);
 623                 if (addr && (be32_to_cpu(*addr) == reg_val))
 624                         break;
 625         }
 626         return node;
 627 }
 628
 629 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
 630                                                  int interface, int port)
 631 {
 632         struct device_node *ni, *np;
 633
 634         ni = cvm_oct_of_get_child(pip, interface);
 635         if (!ni)
 636                 return NULL;
 637
 638         np = cvm_oct_of_get_child(ni, port);
 639         of_node_put(ni);
 640
 641         return np;
 642 }
 643
 644 static void cvm_set_rgmii_delay(struct octeon_ethernet *priv, int iface,
 645                                 int port)
 646 {
 647         struct device_node *np = priv->of_node;
 648         u32 delay_value;
 649         bool rx_delay;
 650         bool tx_delay;
 651
 652         /* By default, both RX/TX delay is enabled in
 653          * __cvmx_helper_rgmii_enable().
 654          */
 655         rx_delay = true;
 656         tx_delay = true;
 657
 658         if (!of_property_read_u32(np, "rx-delay", &delay_value)) {
 659                 cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, iface), delay_value);
 660                 rx_delay = delay_value > 0;
 661         }
 662         if (!of_property_read_u32(np, "tx-delay", &delay_value)) {
 663                 cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, iface), delay_value);
 664                 tx_delay = delay_value > 0;
 665         }
 666
 667         if (!rx_delay && !tx_delay)
 668                 priv->phy_mode = PHY_INTERFACE_MODE_RGMII_ID;
 669         else if (!rx_delay)
 670                 priv->phy_mode = PHY_INTERFACE_MODE_RGMII_RXID;
 671         else if (!tx_delay)
 672                 priv->phy_mode = PHY_INTERFACE_MODE_RGMII_TXID;
 673         else
 674                 priv->phy_mode = PHY_INTERFACE_MODE_RGMII;
 675 }
 676
 677 static int cvm_oct_probe(struct platform_device *pdev)
 678 {
 679         int num_interfaces;
 680         int interface;
 681         int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
 682         int qos;
 683         struct device_node *pip;
 684         int mtu_overhead = ETH_HLEN + ETH_FCS_LEN;
 685
 686 #if IS_ENABLED(CONFIG_VLAN_8021Q)
 687         mtu_overhead += VLAN_HLEN;
 688 #endif
 689
 690         pip = pdev->dev.of_node;
 691         if (!pip) {
 692                 pr_err("Error: No 'pip' in /aliases\n");
 693                 return -EINVAL;
 694         }
 695
 696         cvm_oct_configure_common_hw();
 697
 698         cvmx_helper_initialize_packet_io_global();
 699
 700         if (receive_group_order) {
 701                 if (receive_group_order > 4)
 702                         receive_group_order = 4;
 703                 pow_receive_groups = (1 << (1 << receive_group_order)) - 1;
 704         } else {
 705                 pow_receive_groups = BIT(pow_receive_group);
 706         }
 707
 708         /* Change the input group for all ports before input is enabled */
 709         num_interfaces = cvmx_helper_get_number_of_interfaces();
 710         for (interface = 0; interface < num_interfaces; interface++) {
 711                 int num_ports = cvmx_helper_ports_on_interface(interface);
 712                 int port;
 713
 714                 for (port = cvmx_helper_get_ipd_port(interface, 0);
 715                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 716                      port++) {
 717                         union cvmx_pip_prt_tagx pip_prt_tagx;
 718
 719                         pip_prt_tagx.u64 =
 720                             cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
 721
 722                         if (receive_group_order) {
 723                                 int tag_mask;
 724
 725                                 /* We support only 16 groups at the moment, so
 726                                  * always disable the two additional "hidden"
 727                                  * tag_mask bits on CN68XX.
 728                                  */
 729                                 if (OCTEON_IS_MODEL(OCTEON_CN68XX))
 730                                         pip_prt_tagx.u64 |= 0x3ull << 44;
 731
 732                                 tag_mask = ~((1 << receive_group_order) - 1);
 733                                 pip_prt_tagx.s.grptagbase       = 0;
 734                                 pip_prt_tagx.s.grptagmask       = tag_mask;
 735                                 pip_prt_tagx.s.grptag           = 1;
 736                                 pip_prt_tagx.s.tag_mode         = 0;
 737                                 pip_prt_tagx.s.inc_prt_flag     = 1;
 738                                 pip_prt_tagx.s.ip6_dprt_flag    = 1;
 739                                 pip_prt_tagx.s.ip4_dprt_flag    = 1;
 740                                 pip_prt_tagx.s.ip6_sprt_flag    = 1;
 741                                 pip_prt_tagx.s.ip4_sprt_flag    = 1;
 742                                 pip_prt_tagx.s.ip6_dst_flag     = 1;
 743                                 pip_prt_tagx.s.ip4_dst_flag     = 1;
 744                                 pip_prt_tagx.s.ip6_src_flag     = 1;
 745                                 pip_prt_tagx.s.ip4_src_flag     = 1;
 746                                 pip_prt_tagx.s.grp              = 0;
 747                         } else {
 748                                 pip_prt_tagx.s.grptag   = 0;
 749                                 pip_prt_tagx.s.grp      = pow_receive_group;
 750                         }
 751
 752                         cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
 753                                        pip_prt_tagx.u64);
 754                 }
 755         }
 756
 757         cvmx_helper_ipd_and_packet_input_enable();
 758
 759         memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
 760
 761         /*
 762          * Initialize the FAU used for counting packet buffers that
 763          * need to be freed.
 764          */
 765         cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
 766
 767         /* Initialize the FAU used for counting tx SKBs that need to be freed */
 768         cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
 769
 770         if ((pow_send_group != -1)) {
 771                 struct net_device *dev;
 772
 773                 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
 774                 if (dev) {
 775                         /* Initialize the device private structure. */
 776                         struct octeon_ethernet *priv = netdev_priv(dev);
 777
 778                         SET_NETDEV_DEV(dev, &pdev->dev);
 779                         dev->netdev_ops = &cvm_oct_pow_netdev_ops;
 780                         priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
 781                         priv->port = CVMX_PIP_NUM_INPUT_PORTS;
 782                         priv->queue = -1;
 783                         strscpy(dev->name, "pow%d", sizeof(dev->name));
 784                         for (qos = 0; qos < 16; qos++)
 785                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 786                         dev->min_mtu = VLAN_ETH_ZLEN - mtu_overhead;
 787                         dev->max_mtu = OCTEON_MAX_MTU - mtu_overhead;
 788
 789                         if (register_netdev(dev) < 0) {
 790                                 pr_err("Failed to register ethernet device for POW\n");
 791                                 free_netdev(dev);
 792                         } else {
 793                                 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
 794                                 pr_info("%s: POW send group %d, receive group %d\n",
 795                                         dev->name, pow_send_group,
 796                                         pow_receive_group);
 797                         }
 798                 } else {
 799                         pr_err("Failed to allocate ethernet device for POW\n");
 800                 }
 801         }
 802
 803         num_interfaces = cvmx_helper_get_number_of_interfaces();
 804         for (interface = 0; interface < num_interfaces; interface++) {
 805                 cvmx_helper_interface_mode_t imode =
 806                     cvmx_helper_interface_get_mode(interface);
 807                 int num_ports = cvmx_helper_ports_on_interface(interface);
 808                 int port;
 809                 int port_index;
 810
 811                 for (port_index = 0,
 812                      port = cvmx_helper_get_ipd_port(interface, 0);
 813                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 814                      port_index++, port++) {
 815                         struct octeon_ethernet *priv;
 816                         struct net_device *dev =
 817                             alloc_etherdev(sizeof(struct octeon_ethernet));
 818                         if (!dev) {
 819                                 pr_err("Failed to allocate ethernet device for port %d\n",
 820                                        port);
 821                                 continue;
 822                         }
 823
 824                         /* Initialize the device private structure. */
 825                         SET_NETDEV_DEV(dev, &pdev->dev);
 826                         priv = netdev_priv(dev);
 827                         priv->netdev = dev;
 828                         priv->of_node = cvm_oct_node_for_port(pip, interface,
 829                                                               port_index);
 830
 831                         INIT_DELAYED_WORK(&priv->port_periodic_work,
 832                                           cvm_oct_periodic_worker);
 833                         priv->imode = imode;
 834                         priv->port = port;
 835                         priv->queue = cvmx_pko_get_base_queue(priv->port);
 836                         priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
 837                         priv->phy_mode = PHY_INTERFACE_MODE_NA;
 838                         for (qos = 0; qos < 16; qos++)
 839                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 840                         for (qos = 0; qos < cvmx_pko_get_num_queues(port);
 841                              qos++)
 842                                 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
 843                         dev->min_mtu = VLAN_ETH_ZLEN - mtu_overhead;
 844                         dev->max_mtu = OCTEON_MAX_MTU - mtu_overhead;
 845
 846                         switch (priv->imode) {
 847                         /* These types don't support ports to IPD/PKO */
 848                         case CVMX_HELPER_INTERFACE_MODE_DISABLED:
 849                         case CVMX_HELPER_INTERFACE_MODE_PCIE:
 850                         case CVMX_HELPER_INTERFACE_MODE_PICMG:
 851                                 break;
 852
 853                         case CVMX_HELPER_INTERFACE_MODE_NPI:
 854                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 855                                 strscpy(dev->name, "npi%d", sizeof(dev->name));
 856                                 break;
 857
 858                         case CVMX_HELPER_INTERFACE_MODE_XAUI:
 859                                 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
 860                                 strscpy(dev->name, "xaui%d", sizeof(dev->name));
 861                                 break;
 862
 863                         case CVMX_HELPER_INTERFACE_MODE_LOOP:
 864                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 865                                 strscpy(dev->name, "loop%d", sizeof(dev->name));
 866                                 break;
 867
 868                         case CVMX_HELPER_INTERFACE_MODE_SGMII:
 869                                 priv->phy_mode = PHY_INTERFACE_MODE_SGMII;
 870                                 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
 871                                 strscpy(dev->name, "eth%d", sizeof(dev->name));
 872                                 break;
 873
 874                         case CVMX_HELPER_INTERFACE_MODE_SPI:
 875                                 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
 876                                 strscpy(dev->name, "spi%d", sizeof(dev->name));
 877                                 break;
 878
 879                         case CVMX_HELPER_INTERFACE_MODE_GMII:
 880                                 priv->phy_mode = PHY_INTERFACE_MODE_GMII;
 881                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 882                                 strscpy(dev->name, "eth%d", sizeof(dev->name));
 883                                 break;
 884
 885                         case CVMX_HELPER_INTERFACE_MODE_RGMII:
 886                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 887                                 strscpy(dev->name, "eth%d", sizeof(dev->name));
 888                                 cvm_set_rgmii_delay(priv, interface,
 889                                                     port_index);
 890                                 break;
 891                         }
 892
 893                         if (priv->of_node && of_phy_is_fixed_link(priv->of_node)) {
 894                                 if (of_phy_register_fixed_link(priv->of_node)) {
 895                                         netdev_err(dev, "Failed to register fixed link for interface %d, port %d\n",
 896                                                    interface, priv->port);
 897                                         dev->netdev_ops = NULL;
 898                                 }
 899                         }
 900
 901                         if (!dev->netdev_ops) {
 902                                 free_netdev(dev);
 903                         } else if (register_netdev(dev) < 0) {
 904                                 pr_err("Failed to register ethernet device for interface %d, port %d\n",
 905                                        interface, priv->port);
 906                                 free_netdev(dev);
 907                         } else {
 908                                 cvm_oct_device[priv->port] = dev;
 909                                 fau -=
 910                                     cvmx_pko_get_num_queues(priv->port) *
 911                                     sizeof(u32);
 912                                 schedule_delayed_work(&priv->port_periodic_work,
 913                                                       HZ);
 914                         }
 915                 }
 916         }
 917
 918         cvm_oct_tx_initialize();
 919         cvm_oct_rx_initialize();
 920
 921         /*
 922          * 150 uS: about 10 1500-byte packets at 1GE.
 923          */
 924         cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
 925
 926         schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 927
 928         return 0;
 929 }
 930
 931 static int cvm_oct_remove(struct platform_device *pdev)
 932 {
 933         int port;
 934
 935         cvmx_ipd_disable();
 936
 937         atomic_inc_return(&cvm_oct_poll_queue_stopping);
 938         cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
 939
 940         cvm_oct_rx_shutdown();
 941         cvm_oct_tx_shutdown();
 942
 943         cvmx_pko_disable();
 944
 945         /* Free the ethernet devices */
 946         for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
 947                 if (cvm_oct_device[port]) {
 948                         struct net_device *dev = cvm_oct_device[port];
 949                         struct octeon_ethernet *priv = netdev_priv(dev);
 950
 951                         cancel_delayed_work_sync(&priv->port_periodic_work);
 952
 953                         cvm_oct_tx_shutdown_dev(dev);
 954                         unregister_netdev(dev);
 955                         free_netdev(dev);
 956                         cvm_oct_device[port] = NULL;
 957                 }
 958         }
 959
 960         cvmx_pko_shutdown();
 961
 962         cvmx_ipd_free_ptr();
 963
 964         /* Free the HW pools */
 965         cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 966                               num_packet_buffers);
 967         cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 968                               num_packet_buffers);
 969         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 970                 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 971                                       CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
 972         return 0;
 973 }
 974
 975 static const struct of_device_id cvm_oct_match[] = {
 976         {
 977                 .compatible = "cavium,octeon-3860-pip",
 978         },
 979         {},
 980 };
 981 MODULE_DEVICE_TABLE(of, cvm_oct_match);
 982
 983 static struct platform_driver cvm_oct_driver = {
 984         .probe          = cvm_oct_probe,
 985         .remove         = cvm_oct_remove,
 986         .driver         = {
 987                 .name   = KBUILD_MODNAME,
 988                 .of_match_table = cvm_oct_match,
 989         },
 990 };
 991
 992 module_platform_driver(cvm_oct_driver);
 993
 994 MODULE_SOFTDEP("pre: mdio-cavium");
 995 MODULE_LICENSE("GPL");
 996 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
 997 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");