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_net.h>
  17 #include <linux/if_ether.h>
  18 #include <linux/if_vlan.h>
  19
  20 #include <net/dst.h>
  21
  22 #include <asm/octeon/octeon.h>
  23
  24 #include "ethernet-defines.h"
  25 #include "octeon-ethernet.h"
  26 #include "ethernet-mem.h"
  27 #include "ethernet-rx.h"
  28 #include "ethernet-tx.h"
  29 #include "ethernet-mdio.h"
  30 #include "ethernet-util.h"
  31
  32 #include <asm/octeon/cvmx-pip.h>
  33 #include <asm/octeon/cvmx-pko.h>
  34 #include <asm/octeon/cvmx-fau.h>
  35 #include <asm/octeon/cvmx-ipd.h>
  36 #include <asm/octeon/cvmx-helper.h>
  37 #include <asm/octeon/cvmx-asxx-defs.h>
  38 #include <asm/octeon/cvmx-gmxx-defs.h>
  39
  40 #define OCTEON_MAX_MTU 65392
  41
  42 static int num_packet_buffers = 1024;
  43 module_param(num_packet_buffers, int, 0444);
  44 MODULE_PARM_DESC(num_packet_buffers, "\n"
  45         "\tNumber of packet buffers to allocate and store in the\n"
  46         "\tFPA. By default, 1024 packet buffers are used.\n");
  47
  48 static int pow_receive_group = 15;
  49 module_param(pow_receive_group, int, 0444);
  50 MODULE_PARM_DESC(pow_receive_group, "\n"
  51         "\tPOW group to receive packets from. All ethernet hardware\n"
  52         "\twill be configured to send incoming packets to this POW\n"
  53         "\tgroup. Also any other software can submit packets to this\n"
  54         "\tgroup for the kernel to process.");
  55
  56 static int receive_group_order;
  57 module_param(receive_group_order, int, 0444);
  58 MODULE_PARM_DESC(receive_group_order, "\n"
  59         "\tOrder (0..4) of receive groups to take into use. Ethernet hardware\n"
  60         "\twill be configured to send incoming packets to multiple POW\n"
  61         "\tgroups. pow_receive_group parameter is ignored when multiple\n"
  62         "\tgroups are taken into use and groups are allocated starting\n"
  63         "\tfrom 0. By default, a single group is used.\n");
  64
  65 int pow_send_group = -1;
  66 module_param(pow_send_group, int, 0644);
  67 MODULE_PARM_DESC(pow_send_group, "\n"
  68         "\tPOW group to send packets to other software on. This\n"
  69         "\tcontrols the creation of the virtual device pow0.\n"
  70         "\talways_use_pow also depends on this value.");
  71
  72 int always_use_pow;
  73 module_param(always_use_pow, int, 0444);
  74 MODULE_PARM_DESC(always_use_pow, "\n"
  75         "\tWhen set, always send to the pow group. This will cause\n"
  76         "\tpackets sent to real ethernet devices to be sent to the\n"
  77         "\tPOW group instead of the hardware. Unless some other\n"
  78         "\tapplication changes the config, packets will still be\n"
  79         "\treceived from the low level hardware. Use this option\n"
  80         "\tto allow a CVMX app to intercept all packets from the\n"
  81         "\tlinux kernel. You must specify pow_send_group along with\n"
  82         "\tthis option.");
  83
  84 char pow_send_list[128] = "";
  85 module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444);
  86 MODULE_PARM_DESC(pow_send_list, "\n"
  87         "\tComma separated list of ethernet devices that should use the\n"
  88         "\tPOW for transmit instead of the actual ethernet hardware. This\n"
  89         "\tis a per port version of always_use_pow. always_use_pow takes\n"
  90         "\tprecedence over this list. For example, setting this to\n"
  91         "\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n"
  92         "\tusing the pow_send_group.");
  93
  94 int rx_napi_weight = 32;
  95 module_param(rx_napi_weight, int, 0444);
  96 MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter.");
  97
  98 /* Mask indicating which receive groups are in use. */
  99 int pow_receive_groups;
 100
 101 /*
 102  * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
 103  *
 104  * Set to one right before cvm_oct_poll_queue is destroyed.
 105  */
 106 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
 107
 108 /*
 109  * Array of every ethernet device owned by this driver indexed by
 110  * the ipd input port number.
 111  */
 112 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
 113
 114 u64 cvm_oct_tx_poll_interval;
 115
 116 static void cvm_oct_rx_refill_worker(struct work_struct *work);
 117 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
 118
 119 static void cvm_oct_rx_refill_worker(struct work_struct *work)
 120 {
 121         /*
 122          * FPA 0 may have been drained, try to refill it if we need
 123          * more than num_packet_buffers / 2, otherwise normal receive
 124          * processing will refill it.  If it were drained, no packets
 125          * could be received so cvm_oct_napi_poll would never be
 126          * invoked to do the refill.
 127          */
 128         cvm_oct_rx_refill_pool(num_packet_buffers / 2);
 129
 130         if (!atomic_read(&cvm_oct_poll_queue_stopping))
 131                 schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 132 }
 133
 134 static void cvm_oct_periodic_worker(struct work_struct *work)
 135 {
 136         struct octeon_ethernet *priv = container_of(work,
 137                                                     struct octeon_ethernet,
 138                                                     port_periodic_work.work);
 139
 140         if (priv->poll)
 141                 priv->poll(cvm_oct_device[priv->port]);
 142
 143         cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats
 144                                                 (cvm_oct_device[priv->port]);
 145
 146         if (!atomic_read(&cvm_oct_poll_queue_stopping))
 147                 schedule_delayed_work(&priv->port_periodic_work, HZ);
 148 }
 149
 150 static void cvm_oct_configure_common_hw(void)
 151 {
 152         /* Setup the FPA */
 153         cvmx_fpa_enable();
 154         cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 155                              num_packet_buffers);
 156         cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 157                              num_packet_buffers);
 158         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 159                 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 160                                      CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 1024);
 161
 162 #ifdef __LITTLE_ENDIAN
 163         {
 164                 union cvmx_ipd_ctl_status ipd_ctl_status;
 165
 166                 ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 167                 ipd_ctl_status.s.pkt_lend = 1;
 168                 ipd_ctl_status.s.wqe_lend = 1;
 169                 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
 170         }
 171 #endif
 172
 173         cvmx_helper_setup_red(num_packet_buffers / 4, num_packet_buffers / 8);
 174 }
 175
 176 /**
 177  * cvm_oct_free_work- Free a work queue entry
 178  *
 179  * @work_queue_entry: Work queue entry to free
 180  *
 181  * Returns Zero on success, Negative on failure.
 182  */
 183 int cvm_oct_free_work(void *work_queue_entry)
 184 {
 185         cvmx_wqe_t *work = work_queue_entry;
 186
 187         int segments = work->word2.s.bufs;
 188         union cvmx_buf_ptr segment_ptr = work->packet_ptr;
 189
 190         while (segments--) {
 191                 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
 192                         cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
 193                 if (unlikely(!segment_ptr.s.i))
 194                         cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
 195                                       segment_ptr.s.pool,
 196                                       CVMX_FPA_PACKET_POOL_SIZE / 128);
 197                 segment_ptr = next_ptr;
 198         }
 199         cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, 1);
 200
 201         return 0;
 202 }
 203 EXPORT_SYMBOL(cvm_oct_free_work);
 204
 205 /**
 206  * cvm_oct_common_get_stats - get the low level ethernet statistics
 207  * @dev:    Device to get the statistics from
 208  *
 209  * Returns Pointer to the statistics
 210  */
 211 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
 212 {
 213         cvmx_pip_port_status_t rx_status;
 214         cvmx_pko_port_status_t tx_status;
 215         struct octeon_ethernet *priv = netdev_priv(dev);
 216
 217         if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
 218                 if (octeon_is_simulation()) {
 219                         /* The simulator doesn't support statistics */
 220                         memset(&rx_status, 0, sizeof(rx_status));
 221                         memset(&tx_status, 0, sizeof(tx_status));
 222                 } else {
 223                         cvmx_pip_get_port_status(priv->port, 1, &rx_status);
 224                         cvmx_pko_get_port_status(priv->port, 1, &tx_status);
 225                 }
 226
 227                 dev->stats.rx_packets += rx_status.inb_packets;
 228                 dev->stats.tx_packets += tx_status.packets;
 229                 dev->stats.rx_bytes += rx_status.inb_octets;
 230                 dev->stats.tx_bytes += tx_status.octets;
 231                 dev->stats.multicast += rx_status.multicast_packets;
 232                 dev->stats.rx_crc_errors += rx_status.inb_errors;
 233                 dev->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
 234                 dev->stats.rx_dropped += rx_status.dropped_packets;
 235         }
 236
 237         return &dev->stats;
 238 }
 239
 240 /**
 241  * cvm_oct_common_change_mtu - change the link MTU
 242  * @dev:     Device to change
 243  * @new_mtu: The new MTU
 244  *
 245  * Returns Zero on success
 246  */
 247 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
 248 {
 249         struct octeon_ethernet *priv = netdev_priv(dev);
 250         int interface = INTERFACE(priv->port);
 251 #if IS_ENABLED(CONFIG_VLAN_8021Q)
 252         int vlan_bytes = VLAN_HLEN;
 253 #else
 254         int vlan_bytes = 0;
 255 #endif
 256         int mtu_overhead = ETH_HLEN + ETH_FCS_LEN + vlan_bytes;
 257
 258         dev->mtu = new_mtu;
 259
 260         if ((interface < 2) &&
 261             (cvmx_helper_interface_get_mode(interface) !=
 262                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 263                 int index = INDEX(priv->port);
 264                 /* Add ethernet header and FCS, and VLAN if configured. */
 265                 int max_packet = new_mtu + mtu_overhead;
 266
 267                 if (OCTEON_IS_MODEL(OCTEON_CN3XXX) ||
 268                     OCTEON_IS_MODEL(OCTEON_CN58XX)) {
 269                         /* Signal errors on packets larger than the MTU */
 270                         cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
 271                                        max_packet);
 272                 } else {
 273                         /*
 274                          * Set the hardware to truncate packets larger
 275                          * than the MTU and smaller the 64 bytes.
 276                          */
 277                         union cvmx_pip_frm_len_chkx frm_len_chk;
 278
 279                         frm_len_chk.u64 = 0;
 280                         frm_len_chk.s.minlen = VLAN_ETH_ZLEN;
 281                         frm_len_chk.s.maxlen = max_packet;
 282                         cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
 283                                        frm_len_chk.u64);
 284                 }
 285                 /*
 286                  * Set the hardware to truncate packets larger than
 287                  * the MTU. The jabber register must be set to a
 288                  * multiple of 8 bytes, so round up.
 289                  */
 290                 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
 291                                (max_packet + 7) & ~7u);
 292         }
 293         return 0;
 294 }
 295
 296 /**
 297  * cvm_oct_common_set_multicast_list - set the multicast list
 298  * @dev:    Device to work on
 299  */
 300 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
 301 {
 302         union cvmx_gmxx_prtx_cfg gmx_cfg;
 303         struct octeon_ethernet *priv = netdev_priv(dev);
 304         int interface = INTERFACE(priv->port);
 305
 306         if ((interface < 2) &&
 307             (cvmx_helper_interface_get_mode(interface) !=
 308                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 309                 union cvmx_gmxx_rxx_adr_ctl control;
 310                 int index = INDEX(priv->port);
 311
 312                 control.u64 = 0;
 313                 control.s.bcst = 1;     /* Allow broadcast MAC addresses */
 314
 315                 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
 316                     (dev->flags & IFF_PROMISC))
 317                         /* Force accept multicast packets */
 318                         control.s.mcst = 2;
 319                 else
 320                         /* Force reject multicast packets */
 321                         control.s.mcst = 1;
 322
 323                 if (dev->flags & IFF_PROMISC)
 324                         /*
 325                          * Reject matches if promisc. Since CAM is
 326                          * shut off, should accept everything.
 327                          */
 328                         control.s.cam_mode = 0;
 329                 else
 330                         /* Filter packets based on the CAM */
 331                         control.s.cam_mode = 1;
 332
 333                 gmx_cfg.u64 =
 334                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 335                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 336                                gmx_cfg.u64 & ~1ull);
 337
 338                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
 339                                control.u64);
 340                 if (dev->flags & IFF_PROMISC)
 341                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 342                                        (index, interface), 0);
 343                 else
 344                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 345                                        (index, interface), 1);
 346
 347                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 348                                gmx_cfg.u64);
 349         }
 350 }
 351
 352 static int cvm_oct_set_mac_filter(struct net_device *dev)
 353 {
 354         struct octeon_ethernet *priv = netdev_priv(dev);
 355         union cvmx_gmxx_prtx_cfg gmx_cfg;
 356         int interface = INTERFACE(priv->port);
 357
 358         if ((interface < 2) &&
 359             (cvmx_helper_interface_get_mode(interface) !=
 360                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 361                 int i;
 362                 u8 *ptr = dev->dev_addr;
 363                 u64 mac = 0;
 364                 int index = INDEX(priv->port);
 365
 366                 for (i = 0; i < 6; i++)
 367                         mac = (mac << 8) | (u64)ptr[i];
 368
 369                 gmx_cfg.u64 =
 370                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 371                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 372                                gmx_cfg.u64 & ~1ull);
 373
 374                 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
 375                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
 376                                ptr[0]);
 377                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
 378                                ptr[1]);
 379                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
 380                                ptr[2]);
 381                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
 382                                ptr[3]);
 383                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
 384                                ptr[4]);
 385                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
 386                                ptr[5]);
 387                 cvm_oct_common_set_multicast_list(dev);
 388                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 389                                gmx_cfg.u64);
 390         }
 391         return 0;
 392 }
 393
 394 /**
 395  * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
 396  * @dev:    The device in question.
 397  * @addr:   Socket address.
 398  *
 399  * Returns Zero on success
 400  */
 401 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
 402 {
 403         int r = eth_mac_addr(dev, addr);
 404
 405         if (r)
 406                 return r;
 407         return cvm_oct_set_mac_filter(dev);
 408 }
 409
 410 /**
 411  * cvm_oct_common_init - per network device initialization
 412  * @dev:    Device to initialize
 413  *
 414  * Returns Zero on success
 415  */
 416 int cvm_oct_common_init(struct net_device *dev)
 417 {
 418         struct octeon_ethernet *priv = netdev_priv(dev);
 419         const u8 *mac = NULL;
 420
 421         if (priv->of_node)
 422                 mac = of_get_mac_address(priv->of_node);
 423
 424         if (!IS_ERR_OR_NULL(mac))
 425                 ether_addr_copy(dev->dev_addr, mac);
 426         else
 427                 eth_hw_addr_random(dev);
 428
 429         /*
 430          * Force the interface to use the POW send if always_use_pow
 431          * was specified or it is in the pow send list.
 432          */
 433         if ((pow_send_group != -1) &&
 434             (always_use_pow || strstr(pow_send_list, dev->name)))
 435                 priv->queue = -1;
 436
 437         if (priv->queue != -1)
 438                 dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
 439
 440         /* We do our own locking, Linux doesn't need to */
 441         dev->features |= NETIF_F_LLTX;
 442         dev->ethtool_ops = &cvm_oct_ethtool_ops;
 443
 444         cvm_oct_set_mac_filter(dev);
 445         dev_set_mtu(dev, dev->mtu);
 446
 447         /*
 448          * Zero out stats for port so we won't mistakenly show
 449          * counters from the bootloader.
 450          */
 451         memset(dev->netdev_ops->ndo_get_stats(dev), 0,
 452                sizeof(struct net_device_stats));
 453
 454         if (dev->netdev_ops->ndo_stop)
 455                 dev->netdev_ops->ndo_stop(dev);
 456
 457         return 0;
 458 }
 459
 460 void cvm_oct_common_uninit(struct net_device *dev)
 461 {
 462         if (dev->phydev)
 463                 phy_disconnect(dev->phydev);
 464 }
 465
 466 int cvm_oct_common_open(struct net_device *dev,
 467                         void (*link_poll)(struct net_device *))
 468 {
 469         union cvmx_gmxx_prtx_cfg gmx_cfg;
 470         struct octeon_ethernet *priv = netdev_priv(dev);
 471         int interface = INTERFACE(priv->port);
 472         int index = INDEX(priv->port);
 473         cvmx_helper_link_info_t link_info;
 474         int rv;
 475
 476         rv = cvm_oct_phy_setup_device(dev);
 477         if (rv)
 478                 return rv;
 479
 480         gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 481         gmx_cfg.s.en = 1;
 482         if (octeon_has_feature(OCTEON_FEATURE_PKND))
 483                 gmx_cfg.s.pknd = priv->port;
 484         cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
 485
 486         if (octeon_is_simulation())
 487                 return 0;
 488
 489         if (dev->phydev) {
 490                 int r = phy_read_status(dev->phydev);
 491
 492                 if (r == 0 && dev->phydev->link == 0)
 493                         netif_carrier_off(dev);
 494                 cvm_oct_adjust_link(dev);
 495         } else {
 496                 link_info = cvmx_helper_link_get(priv->port);
 497                 if (!link_info.s.link_up)
 498                         netif_carrier_off(dev);
 499                 priv->poll = link_poll;
 500                 link_poll(dev);
 501         }
 502
 503         return 0;
 504 }
 505
 506 void cvm_oct_link_poll(struct net_device *dev)
 507 {
 508         struct octeon_ethernet *priv = netdev_priv(dev);
 509         cvmx_helper_link_info_t link_info;
 510
 511         link_info = cvmx_helper_link_get(priv->port);
 512         if (link_info.u64 == priv->link_info)
 513                 return;
 514
 515         if (cvmx_helper_link_set(priv->port, link_info))
 516                 link_info.u64 = priv->link_info;
 517         else
 518                 priv->link_info = link_info.u64;
 519
 520         if (link_info.s.link_up) {
 521                 if (!netif_carrier_ok(dev))
 522                         netif_carrier_on(dev);
 523         } else if (netif_carrier_ok(dev)) {
 524                 netif_carrier_off(dev);
 525         }
 526         cvm_oct_note_carrier(priv, link_info);
 527 }
 528
 529 static int cvm_oct_xaui_open(struct net_device *dev)
 530 {
 531         return cvm_oct_common_open(dev, cvm_oct_link_poll);
 532 }
 533
 534 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
 535         .ndo_init               = cvm_oct_common_init,
 536         .ndo_uninit             = cvm_oct_common_uninit,
 537         .ndo_start_xmit         = cvm_oct_xmit,
 538         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 539         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 540         .ndo_do_ioctl           = cvm_oct_ioctl,
 541         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 542         .ndo_get_stats          = cvm_oct_common_get_stats,
 543 #ifdef CONFIG_NET_POLL_CONTROLLER
 544         .ndo_poll_controller    = cvm_oct_poll_controller,
 545 #endif
 546 };
 547
 548 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
 549         .ndo_init               = cvm_oct_common_init,
 550         .ndo_uninit             = cvm_oct_common_uninit,
 551         .ndo_open               = cvm_oct_xaui_open,
 552         .ndo_stop               = cvm_oct_common_stop,
 553         .ndo_start_xmit         = cvm_oct_xmit,
 554         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 555         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 556         .ndo_do_ioctl           = cvm_oct_ioctl,
 557         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 558         .ndo_get_stats          = cvm_oct_common_get_stats,
 559 #ifdef CONFIG_NET_POLL_CONTROLLER
 560         .ndo_poll_controller    = cvm_oct_poll_controller,
 561 #endif
 562 };
 563
 564 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
 565         .ndo_init               = cvm_oct_sgmii_init,
 566         .ndo_uninit             = cvm_oct_common_uninit,
 567         .ndo_open               = cvm_oct_sgmii_open,
 568         .ndo_stop               = cvm_oct_common_stop,
 569         .ndo_start_xmit         = cvm_oct_xmit,
 570         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 571         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 572         .ndo_do_ioctl           = cvm_oct_ioctl,
 573         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 574         .ndo_get_stats          = cvm_oct_common_get_stats,
 575 #ifdef CONFIG_NET_POLL_CONTROLLER
 576         .ndo_poll_controller    = cvm_oct_poll_controller,
 577 #endif
 578 };
 579
 580 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
 581         .ndo_init               = cvm_oct_spi_init,
 582         .ndo_uninit             = cvm_oct_spi_uninit,
 583         .ndo_start_xmit         = cvm_oct_xmit,
 584         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 585         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 586         .ndo_do_ioctl           = cvm_oct_ioctl,
 587         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 588         .ndo_get_stats          = cvm_oct_common_get_stats,
 589 #ifdef CONFIG_NET_POLL_CONTROLLER
 590         .ndo_poll_controller    = cvm_oct_poll_controller,
 591 #endif
 592 };
 593
 594 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
 595         .ndo_init               = cvm_oct_common_init,
 596         .ndo_uninit             = cvm_oct_common_uninit,
 597         .ndo_open               = cvm_oct_rgmii_open,
 598         .ndo_stop               = cvm_oct_common_stop,
 599         .ndo_start_xmit         = cvm_oct_xmit,
 600         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 601         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 602         .ndo_do_ioctl           = cvm_oct_ioctl,
 603         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 604         .ndo_get_stats          = cvm_oct_common_get_stats,
 605 #ifdef CONFIG_NET_POLL_CONTROLLER
 606         .ndo_poll_controller    = cvm_oct_poll_controller,
 607 #endif
 608 };
 609
 610 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
 611         .ndo_init               = cvm_oct_common_init,
 612         .ndo_start_xmit         = cvm_oct_xmit_pow,
 613         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 614         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 615         .ndo_do_ioctl           = cvm_oct_ioctl,
 616         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 617         .ndo_get_stats          = cvm_oct_common_get_stats,
 618 #ifdef CONFIG_NET_POLL_CONTROLLER
 619         .ndo_poll_controller    = cvm_oct_poll_controller,
 620 #endif
 621 };
 622
 623 static struct device_node *cvm_oct_of_get_child
 624                                 (const struct device_node *parent, int reg_val)
 625 {
 626         struct device_node *node = NULL;
 627         int size;
 628         const __be32 *addr;
 629
 630         for (;;) {
 631                 node = of_get_next_child(parent, node);
 632                 if (!node)
 633                         break;
 634                 addr = of_get_property(node, "reg", &size);
 635                 if (addr && (be32_to_cpu(*addr) == reg_val))
 636                         break;
 637         }
 638         return node;
 639 }
 640
 641 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
 642                                                  int interface, int port)
 643 {
 644         struct device_node *ni, *np;
 645
 646         ni = cvm_oct_of_get_child(pip, interface);
 647         if (!ni)
 648                 return NULL;
 649
 650         np = cvm_oct_of_get_child(ni, port);
 651         of_node_put(ni);
 652
 653         return np;
 654 }
 655
 656 static void cvm_set_rgmii_delay(struct octeon_ethernet *priv, int iface,
 657                                 int port)
 658 {
 659         struct device_node *np = priv->of_node;
 660         u32 delay_value;
 661         bool rx_delay;
 662         bool tx_delay;
 663
 664         /* By default, both RX/TX delay is enabled in
 665          * __cvmx_helper_rgmii_enable().
 666          */
 667         rx_delay = true;
 668         tx_delay = true;
 669
 670         if (!of_property_read_u32(np, "rx-delay", &delay_value)) {
 671                 cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, iface), delay_value);
 672                 rx_delay = delay_value > 0;
 673         }
 674         if (!of_property_read_u32(np, "tx-delay", &delay_value)) {
 675                 cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, iface), delay_value);
 676                 tx_delay = delay_value > 0;
 677         }
 678
 679         if (!rx_delay && !tx_delay)
 680                 priv->phy_mode = PHY_INTERFACE_MODE_RGMII_ID;
 681         else if (!rx_delay)
 682                 priv->phy_mode = PHY_INTERFACE_MODE_RGMII_RXID;
 683         else if (!tx_delay)
 684                 priv->phy_mode = PHY_INTERFACE_MODE_RGMII_TXID;
 685         else
 686                 priv->phy_mode = PHY_INTERFACE_MODE_RGMII;
 687 }
 688
 689 static int cvm_oct_probe(struct platform_device *pdev)
 690 {
 691         int num_interfaces;
 692         int interface;
 693         int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
 694         int qos;
 695         struct device_node *pip;
 696         int mtu_overhead = ETH_HLEN + ETH_FCS_LEN;
 697
 698 #if IS_ENABLED(CONFIG_VLAN_8021Q)
 699         mtu_overhead += VLAN_HLEN;
 700 #endif
 701
 702         octeon_mdiobus_force_mod_depencency();
 703
 704         pip = pdev->dev.of_node;
 705         if (!pip) {
 706                 pr_err("Error: No 'pip' in /aliases\n");
 707                 return -EINVAL;
 708         }
 709
 710         cvm_oct_configure_common_hw();
 711
 712         cvmx_helper_initialize_packet_io_global();
 713
 714         if (receive_group_order) {
 715                 if (receive_group_order > 4)
 716                         receive_group_order = 4;
 717                 pow_receive_groups = (1 << (1 << receive_group_order)) - 1;
 718         } else {
 719                 pow_receive_groups = BIT(pow_receive_group);
 720         }
 721
 722         /* Change the input group for all ports before input is enabled */
 723         num_interfaces = cvmx_helper_get_number_of_interfaces();
 724         for (interface = 0; interface < num_interfaces; interface++) {
 725                 int num_ports = cvmx_helper_ports_on_interface(interface);
 726                 int port;
 727
 728                 for (port = cvmx_helper_get_ipd_port(interface, 0);
 729                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 730                      port++) {
 731                         union cvmx_pip_prt_tagx pip_prt_tagx;
 732
 733                         pip_prt_tagx.u64 =
 734                             cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
 735
 736                         if (receive_group_order) {
 737                                 int tag_mask;
 738
 739                                 /* We support only 16 groups at the moment, so
 740                                  * always disable the two additional "hidden"
 741                                  * tag_mask bits on CN68XX.
 742                                  */
 743                                 if (OCTEON_IS_MODEL(OCTEON_CN68XX))
 744                                         pip_prt_tagx.u64 |= 0x3ull << 44;
 745
 746                                 tag_mask = ~((1 << receive_group_order) - 1);
 747                                 pip_prt_tagx.s.grptagbase       = 0;
 748                                 pip_prt_tagx.s.grptagmask       = tag_mask;
 749                                 pip_prt_tagx.s.grptag           = 1;
 750                                 pip_prt_tagx.s.tag_mode         = 0;
 751                                 pip_prt_tagx.s.inc_prt_flag     = 1;
 752                                 pip_prt_tagx.s.ip6_dprt_flag    = 1;
 753                                 pip_prt_tagx.s.ip4_dprt_flag    = 1;
 754                                 pip_prt_tagx.s.ip6_sprt_flag    = 1;
 755                                 pip_prt_tagx.s.ip4_sprt_flag    = 1;
 756                                 pip_prt_tagx.s.ip6_dst_flag     = 1;
 757                                 pip_prt_tagx.s.ip4_dst_flag     = 1;
 758                                 pip_prt_tagx.s.ip6_src_flag     = 1;
 759                                 pip_prt_tagx.s.ip4_src_flag     = 1;
 760                                 pip_prt_tagx.s.grp              = 0;
 761                         } else {
 762                                 pip_prt_tagx.s.grptag   = 0;
 763                                 pip_prt_tagx.s.grp      = pow_receive_group;
 764                         }
 765
 766                         cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
 767                                        pip_prt_tagx.u64);
 768                 }
 769         }
 770
 771         cvmx_helper_ipd_and_packet_input_enable();
 772
 773         memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
 774
 775         /*
 776          * Initialize the FAU used for counting packet buffers that
 777          * need to be freed.
 778          */
 779         cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
 780
 781         /* Initialize the FAU used for counting tx SKBs that need to be freed */
 782         cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
 783
 784         if ((pow_send_group != -1)) {
 785                 struct net_device *dev;
 786
 787                 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
 788                 if (dev) {
 789                         /* Initialize the device private structure. */
 790                         struct octeon_ethernet *priv = netdev_priv(dev);
 791
 792                         SET_NETDEV_DEV(dev, &pdev->dev);
 793                         dev->netdev_ops = &cvm_oct_pow_netdev_ops;
 794                         priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
 795                         priv->port = CVMX_PIP_NUM_INPUT_PORTS;
 796                         priv->queue = -1;
 797                         strcpy(dev->name, "pow%d");
 798                         for (qos = 0; qos < 16; qos++)
 799                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 800                         dev->min_mtu = VLAN_ETH_ZLEN - mtu_overhead;
 801                         dev->max_mtu = OCTEON_MAX_MTU - mtu_overhead;
 802
 803                         if (register_netdev(dev) < 0) {
 804                                 pr_err("Failed to register ethernet device for POW\n");
 805                                 free_netdev(dev);
 806                         } else {
 807                                 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
 808                                 pr_info("%s: POW send group %d, receive group %d\n",
 809                                         dev->name, pow_send_group,
 810                                         pow_receive_group);
 811                         }
 812                 } else {
 813                         pr_err("Failed to allocate ethernet device for POW\n");
 814                 }
 815         }
 816
 817         num_interfaces = cvmx_helper_get_number_of_interfaces();
 818         for (interface = 0; interface < num_interfaces; interface++) {
 819                 cvmx_helper_interface_mode_t imode =
 820                     cvmx_helper_interface_get_mode(interface);
 821                 int num_ports = cvmx_helper_ports_on_interface(interface);
 822                 int port;
 823                 int port_index;
 824
 825                 for (port_index = 0,
 826                      port = cvmx_helper_get_ipd_port(interface, 0);
 827                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 828                      port_index++, port++) {
 829                         struct octeon_ethernet *priv;
 830                         struct net_device *dev =
 831                             alloc_etherdev(sizeof(struct octeon_ethernet));
 832                         if (!dev) {
 833                                 pr_err("Failed to allocate ethernet device for port %d\n",
 834                                        port);
 835                                 continue;
 836                         }
 837
 838                         /* Initialize the device private structure. */
 839                         SET_NETDEV_DEV(dev, &pdev->dev);
 840                         priv = netdev_priv(dev);
 841                         priv->netdev = dev;
 842                         priv->of_node = cvm_oct_node_for_port(pip, interface,
 843                                                               port_index);
 844
 845                         INIT_DELAYED_WORK(&priv->port_periodic_work,
 846                                           cvm_oct_periodic_worker);
 847                         priv->imode = imode;
 848                         priv->port = port;
 849                         priv->queue = cvmx_pko_get_base_queue(priv->port);
 850                         priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
 851                         priv->phy_mode = PHY_INTERFACE_MODE_NA;
 852                         for (qos = 0; qos < 16; qos++)
 853                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 854                         for (qos = 0; qos < cvmx_pko_get_num_queues(port);
 855                              qos++)
 856                                 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
 857                         dev->min_mtu = VLAN_ETH_ZLEN - mtu_overhead;
 858                         dev->max_mtu = OCTEON_MAX_MTU - mtu_overhead;
 859
 860                         switch (priv->imode) {
 861                         /* These types don't support ports to IPD/PKO */
 862                         case CVMX_HELPER_INTERFACE_MODE_DISABLED:
 863                         case CVMX_HELPER_INTERFACE_MODE_PCIE:
 864                         case CVMX_HELPER_INTERFACE_MODE_PICMG:
 865                                 break;
 866
 867                         case CVMX_HELPER_INTERFACE_MODE_NPI:
 868                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 869                                 strcpy(dev->name, "npi%d");
 870                                 break;
 871
 872                         case CVMX_HELPER_INTERFACE_MODE_XAUI:
 873                                 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
 874                                 strcpy(dev->name, "xaui%d");
 875                                 break;
 876
 877                         case CVMX_HELPER_INTERFACE_MODE_LOOP:
 878                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 879                                 strcpy(dev->name, "loop%d");
 880                                 break;
 881
 882                         case CVMX_HELPER_INTERFACE_MODE_SGMII:
 883                                 priv->phy_mode = PHY_INTERFACE_MODE_SGMII;
 884                                 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
 885                                 strcpy(dev->name, "eth%d");
 886                                 break;
 887
 888                         case CVMX_HELPER_INTERFACE_MODE_SPI:
 889                                 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
 890                                 strcpy(dev->name, "spi%d");
 891                                 break;
 892
 893                         case CVMX_HELPER_INTERFACE_MODE_GMII:
 894                                 priv->phy_mode = PHY_INTERFACE_MODE_GMII;
 895                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 896                                 strcpy(dev->name, "eth%d");
 897                                 break;
 898
 899                         case CVMX_HELPER_INTERFACE_MODE_RGMII:
 900                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 901                                 strcpy(dev->name, "eth%d");
 902                                 cvm_set_rgmii_delay(priv, interface,
 903                                                     port_index);
 904                                 break;
 905                         }
 906
 907                         if (!dev->netdev_ops) {
 908                                 free_netdev(dev);
 909                         } else if (register_netdev(dev) < 0) {
 910                                 pr_err("Failed to register ethernet device for interface %d, port %d\n",
 911                                        interface, priv->port);
 912                                 free_netdev(dev);
 913                         } else {
 914                                 cvm_oct_device[priv->port] = dev;
 915                                 fau -=
 916                                     cvmx_pko_get_num_queues(priv->port) *
 917                                     sizeof(u32);
 918                                 schedule_delayed_work(&priv->port_periodic_work,
 919                                                       HZ);
 920                         }
 921                 }
 922         }
 923
 924         cvm_oct_tx_initialize();
 925         cvm_oct_rx_initialize();
 926
 927         /*
 928          * 150 uS: about 10 1500-byte packets at 1GE.
 929          */
 930         cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
 931
 932         schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 933
 934         return 0;
 935 }
 936
 937 static int cvm_oct_remove(struct platform_device *pdev)
 938 {
 939         int port;
 940
 941         cvmx_ipd_disable();
 942
 943         atomic_inc_return(&cvm_oct_poll_queue_stopping);
 944         cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
 945
 946         cvm_oct_rx_shutdown();
 947         cvm_oct_tx_shutdown();
 948
 949         cvmx_pko_disable();
 950
 951         /* Free the ethernet devices */
 952         for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
 953                 if (cvm_oct_device[port]) {
 954                         struct net_device *dev = cvm_oct_device[port];
 955                         struct octeon_ethernet *priv = netdev_priv(dev);
 956
 957                         cancel_delayed_work_sync(&priv->port_periodic_work);
 958
 959                         cvm_oct_tx_shutdown_dev(dev);
 960                         unregister_netdev(dev);
 961                         free_netdev(dev);
 962                         cvm_oct_device[port] = NULL;
 963                 }
 964         }
 965
 966         cvmx_pko_shutdown();
 967
 968         cvmx_ipd_free_ptr();
 969
 970         /* Free the HW pools */
 971         cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 972                               num_packet_buffers);
 973         cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 974                               num_packet_buffers);
 975         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 976                 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 977                                       CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
 978         return 0;
 979 }
 980
 981 static const struct of_device_id cvm_oct_match[] = {
 982         {
 983                 .compatible = "cavium,octeon-3860-pip",
 984         },
 985         {},
 986 };
 987 MODULE_DEVICE_TABLE(of, cvm_oct_match);
 988
 989 static struct platform_driver cvm_oct_driver = {
 990         .probe          = cvm_oct_probe,
 991         .remove         = cvm_oct_remove,
 992         .driver         = {
 993                 .name   = KBUILD_MODNAME,
 994                 .of_match_table = cvm_oct_match,
 995         },
 996 };
 997
 998 module_platform_driver(cvm_oct_driver);
 999
1000 MODULE_LICENSE("GPL");
1001 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
1002 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");