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         int ret;
 411
 412         ret = of_get_mac_address(priv->of_node, dev->dev_addr);
 413         if (ret)
 414                 eth_hw_addr_random(dev);
 415
 416         /*
 417          * Force the interface to use the POW send if always_use_pow
 418          * was specified or it is in the pow send list.
 419          */
 420         if ((pow_send_group != -1) &&
 421             (always_use_pow || strstr(pow_send_list, dev->name)))
 422                 priv->queue = -1;
 423
 424         if (priv->queue != -1)
 425                 dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
 426
 427         /* We do our own locking, Linux doesn't need to */
 428         dev->features |= NETIF_F_LLTX;
 429         dev->ethtool_ops = &cvm_oct_ethtool_ops;
 430
 431         cvm_oct_set_mac_filter(dev);
 432         dev_set_mtu(dev, dev->mtu);
 433
 434         /*
 435          * Zero out stats for port so we won't mistakenly show
 436          * counters from the bootloader.
 437          */
 438         memset(dev->netdev_ops->ndo_get_stats(dev), 0,
 439                sizeof(struct net_device_stats));
 440
 441         if (dev->netdev_ops->ndo_stop)
 442                 dev->netdev_ops->ndo_stop(dev);
 443
 444         return 0;
 445 }
 446
 447 void cvm_oct_common_uninit(struct net_device *dev)
 448 {
 449         if (dev->phydev)
 450                 phy_disconnect(dev->phydev);
 451 }
 452
 453 int cvm_oct_common_open(struct net_device *dev,
 454                         void (*link_poll)(struct net_device *))
 455 {
 456         union cvmx_gmxx_prtx_cfg gmx_cfg;
 457         struct octeon_ethernet *priv = netdev_priv(dev);
 458         int interface = INTERFACE(priv->port);
 459         int index = INDEX(priv->port);
 460         union cvmx_helper_link_info link_info;
 461         int rv;
 462
 463         rv = cvm_oct_phy_setup_device(dev);
 464         if (rv)
 465                 return rv;
 466
 467         gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 468         gmx_cfg.s.en = 1;
 469         if (octeon_has_feature(OCTEON_FEATURE_PKND))
 470                 gmx_cfg.s.pknd = priv->port;
 471         cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
 472
 473         if (octeon_is_simulation())
 474                 return 0;
 475
 476         if (dev->phydev) {
 477                 int r = phy_read_status(dev->phydev);
 478
 479                 if (r == 0 && dev->phydev->link == 0)
 480                         netif_carrier_off(dev);
 481                 cvm_oct_adjust_link(dev);
 482         } else {
 483                 link_info = cvmx_helper_link_get(priv->port);
 484                 if (!link_info.s.link_up)
 485                         netif_carrier_off(dev);
 486                 priv->poll = link_poll;
 487                 link_poll(dev);
 488         }
 489
 490         return 0;
 491 }
 492
 493 void cvm_oct_link_poll(struct net_device *dev)
 494 {
 495         struct octeon_ethernet *priv = netdev_priv(dev);
 496         union cvmx_helper_link_info link_info;
 497
 498         link_info = cvmx_helper_link_get(priv->port);
 499         if (link_info.u64 == priv->link_info)
 500                 return;
 501
 502         if (cvmx_helper_link_set(priv->port, link_info))
 503                 link_info.u64 = priv->link_info;
 504         else
 505                 priv->link_info = link_info.u64;
 506
 507         if (link_info.s.link_up) {
 508                 if (!netif_carrier_ok(dev))
 509                         netif_carrier_on(dev);
 510         } else if (netif_carrier_ok(dev)) {
 511                 netif_carrier_off(dev);
 512         }
 513         cvm_oct_note_carrier(priv, link_info);
 514 }
 515
 516 static int cvm_oct_xaui_open(struct net_device *dev)
 517 {
 518         return cvm_oct_common_open(dev, cvm_oct_link_poll);
 519 }
 520
 521 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
 522         .ndo_init               = cvm_oct_common_init,
 523         .ndo_uninit             = cvm_oct_common_uninit,
 524         .ndo_start_xmit         = cvm_oct_xmit,
 525         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 526         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 527         .ndo_do_ioctl           = cvm_oct_ioctl,
 528         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 529         .ndo_get_stats          = cvm_oct_common_get_stats,
 530 #ifdef CONFIG_NET_POLL_CONTROLLER
 531         .ndo_poll_controller    = cvm_oct_poll_controller,
 532 #endif
 533 };
 534
 535 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
 536         .ndo_init               = cvm_oct_common_init,
 537         .ndo_uninit             = cvm_oct_common_uninit,
 538         .ndo_open               = cvm_oct_xaui_open,
 539         .ndo_stop               = cvm_oct_common_stop,
 540         .ndo_start_xmit         = cvm_oct_xmit,
 541         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 542         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 543         .ndo_do_ioctl           = cvm_oct_ioctl,
 544         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 545         .ndo_get_stats          = cvm_oct_common_get_stats,
 546 #ifdef CONFIG_NET_POLL_CONTROLLER
 547         .ndo_poll_controller    = cvm_oct_poll_controller,
 548 #endif
 549 };
 550
 551 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
 552         .ndo_init               = cvm_oct_sgmii_init,
 553         .ndo_uninit             = cvm_oct_common_uninit,
 554         .ndo_open               = cvm_oct_sgmii_open,
 555         .ndo_stop               = cvm_oct_common_stop,
 556         .ndo_start_xmit         = cvm_oct_xmit,
 557         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 558         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 559         .ndo_do_ioctl           = cvm_oct_ioctl,
 560         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 561         .ndo_get_stats          = cvm_oct_common_get_stats,
 562 #ifdef CONFIG_NET_POLL_CONTROLLER
 563         .ndo_poll_controller    = cvm_oct_poll_controller,
 564 #endif
 565 };
 566
 567 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
 568         .ndo_init               = cvm_oct_spi_init,
 569         .ndo_uninit             = cvm_oct_spi_uninit,
 570         .ndo_start_xmit         = cvm_oct_xmit,
 571         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 572         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 573         .ndo_do_ioctl           = cvm_oct_ioctl,
 574         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 575         .ndo_get_stats          = cvm_oct_common_get_stats,
 576 #ifdef CONFIG_NET_POLL_CONTROLLER
 577         .ndo_poll_controller    = cvm_oct_poll_controller,
 578 #endif
 579 };
 580
 581 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
 582         .ndo_init               = cvm_oct_common_init,
 583         .ndo_uninit             = cvm_oct_common_uninit,
 584         .ndo_open               = cvm_oct_rgmii_open,
 585         .ndo_stop               = cvm_oct_common_stop,
 586         .ndo_start_xmit         = cvm_oct_xmit,
 587         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 588         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 589         .ndo_do_ioctl           = cvm_oct_ioctl,
 590         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 591         .ndo_get_stats          = cvm_oct_common_get_stats,
 592 #ifdef CONFIG_NET_POLL_CONTROLLER
 593         .ndo_poll_controller    = cvm_oct_poll_controller,
 594 #endif
 595 };
 596
 597 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
 598         .ndo_init               = cvm_oct_common_init,
 599         .ndo_start_xmit         = cvm_oct_xmit_pow,
 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 struct device_node *cvm_oct_of_get_child
 611                                 (const struct device_node *parent, int reg_val)
 612 {
 613         struct device_node *node;
 614         const __be32 *addr;
 615         int size;
 616
 617         for_each_child_of_node(parent, node) {
 618                 addr = of_get_property(node, "reg", &size);
 619                 if (addr && (be32_to_cpu(*addr) == reg_val))
 620                         break;
 621         }
 622         return node;
 623 }
 624
 625 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
 626                                                  int interface, int port)
 627 {
 628         struct device_node *ni, *np;
 629
 630         ni = cvm_oct_of_get_child(pip, interface);
 631         if (!ni)
 632                 return NULL;
 633
 634         np = cvm_oct_of_get_child(ni, port);
 635         of_node_put(ni);
 636
 637         return np;
 638 }
 639
 640 static void cvm_set_rgmii_delay(struct octeon_ethernet *priv, int iface,
 641                                 int port)
 642 {
 643         struct device_node *np = priv->of_node;
 644         u32 delay_value;
 645         bool rx_delay;
 646         bool tx_delay;
 647
 648         /* By default, both RX/TX delay is enabled in
 649          * __cvmx_helper_rgmii_enable().
 650          */
 651         rx_delay = true;
 652         tx_delay = true;
 653
 654         if (!of_property_read_u32(np, "rx-delay", &delay_value)) {
 655                 cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, iface), delay_value);
 656                 rx_delay = delay_value > 0;
 657         }
 658         if (!of_property_read_u32(np, "tx-delay", &delay_value)) {
 659                 cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, iface), delay_value);
 660                 tx_delay = delay_value > 0;
 661         }
 662
 663         if (!rx_delay && !tx_delay)
 664                 priv->phy_mode = PHY_INTERFACE_MODE_RGMII_ID;
 665         else if (!rx_delay)
 666                 priv->phy_mode = PHY_INTERFACE_MODE_RGMII_RXID;
 667         else if (!tx_delay)
 668                 priv->phy_mode = PHY_INTERFACE_MODE_RGMII_TXID;
 669         else
 670                 priv->phy_mode = PHY_INTERFACE_MODE_RGMII;
 671 }
 672
 673 static int cvm_oct_probe(struct platform_device *pdev)
 674 {
 675         int num_interfaces;
 676         int interface;
 677         int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
 678         int qos;
 679         struct device_node *pip;
 680         int mtu_overhead = ETH_HLEN + ETH_FCS_LEN;
 681
 682 #if IS_ENABLED(CONFIG_VLAN_8021Q)
 683         mtu_overhead += VLAN_HLEN;
 684 #endif
 685
 686         pip = pdev->dev.of_node;
 687         if (!pip) {
 688                 pr_err("Error: No 'pip' in /aliases\n");
 689                 return -EINVAL;
 690         }
 691
 692         cvm_oct_configure_common_hw();
 693
 694         cvmx_helper_initialize_packet_io_global();
 695
 696         if (receive_group_order) {
 697                 if (receive_group_order > 4)
 698                         receive_group_order = 4;
 699                 pow_receive_groups = (1 << (1 << receive_group_order)) - 1;
 700         } else {
 701                 pow_receive_groups = BIT(pow_receive_group);
 702         }
 703
 704         /* Change the input group for all ports before input is enabled */
 705         num_interfaces = cvmx_helper_get_number_of_interfaces();
 706         for (interface = 0; interface < num_interfaces; interface++) {
 707                 int num_ports = cvmx_helper_ports_on_interface(interface);
 708                 int port;
 709
 710                 for (port = cvmx_helper_get_ipd_port(interface, 0);
 711                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 712                      port++) {
 713                         union cvmx_pip_prt_tagx pip_prt_tagx;
 714
 715                         pip_prt_tagx.u64 =
 716                             cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
 717
 718                         if (receive_group_order) {
 719                                 int tag_mask;
 720
 721                                 /* We support only 16 groups at the moment, so
 722                                  * always disable the two additional "hidden"
 723                                  * tag_mask bits on CN68XX.
 724                                  */
 725                                 if (OCTEON_IS_MODEL(OCTEON_CN68XX))
 726                                         pip_prt_tagx.u64 |= 0x3ull << 44;
 727
 728                                 tag_mask = ~((1 << receive_group_order) - 1);
 729                                 pip_prt_tagx.s.grptagbase       = 0;
 730                                 pip_prt_tagx.s.grptagmask       = tag_mask;
 731                                 pip_prt_tagx.s.grptag           = 1;
 732                                 pip_prt_tagx.s.tag_mode         = 0;
 733                                 pip_prt_tagx.s.inc_prt_flag     = 1;
 734                                 pip_prt_tagx.s.ip6_dprt_flag    = 1;
 735                                 pip_prt_tagx.s.ip4_dprt_flag    = 1;
 736                                 pip_prt_tagx.s.ip6_sprt_flag    = 1;
 737                                 pip_prt_tagx.s.ip4_sprt_flag    = 1;
 738                                 pip_prt_tagx.s.ip6_dst_flag     = 1;
 739                                 pip_prt_tagx.s.ip4_dst_flag     = 1;
 740                                 pip_prt_tagx.s.ip6_src_flag     = 1;
 741                                 pip_prt_tagx.s.ip4_src_flag     = 1;
 742                                 pip_prt_tagx.s.grp              = 0;
 743                         } else {
 744                                 pip_prt_tagx.s.grptag   = 0;
 745                                 pip_prt_tagx.s.grp      = pow_receive_group;
 746                         }
 747
 748                         cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
 749                                        pip_prt_tagx.u64);
 750                 }
 751         }
 752
 753         cvmx_helper_ipd_and_packet_input_enable();
 754
 755         memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
 756
 757         /*
 758          * Initialize the FAU used for counting packet buffers that
 759          * need to be freed.
 760          */
 761         cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
 762
 763         /* Initialize the FAU used for counting tx SKBs that need to be freed */
 764         cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
 765
 766         if ((pow_send_group != -1)) {
 767                 struct net_device *dev;
 768
 769                 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
 770                 if (dev) {
 771                         /* Initialize the device private structure. */
 772                         struct octeon_ethernet *priv = netdev_priv(dev);
 773
 774                         SET_NETDEV_DEV(dev, &pdev->dev);
 775                         dev->netdev_ops = &cvm_oct_pow_netdev_ops;
 776                         priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
 777                         priv->port = CVMX_PIP_NUM_INPUT_PORTS;
 778                         priv->queue = -1;
 779                         strscpy(dev->name, "pow%d", sizeof(dev->name));
 780                         for (qos = 0; qos < 16; qos++)
 781                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 782                         dev->min_mtu = VLAN_ETH_ZLEN - mtu_overhead;
 783                         dev->max_mtu = OCTEON_MAX_MTU - mtu_overhead;
 784
 785                         if (register_netdev(dev) < 0) {
 786                                 pr_err("Failed to register ethernet device for POW\n");
 787                                 free_netdev(dev);
 788                         } else {
 789                                 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
 790                                 pr_info("%s: POW send group %d, receive group %d\n",
 791                                         dev->name, pow_send_group,
 792                                         pow_receive_group);
 793                         }
 794                 } else {
 795                         pr_err("Failed to allocate ethernet device for POW\n");
 796                 }
 797         }
 798
 799         num_interfaces = cvmx_helper_get_number_of_interfaces();
 800         for (interface = 0; interface < num_interfaces; interface++) {
 801                 cvmx_helper_interface_mode_t imode =
 802                     cvmx_helper_interface_get_mode(interface);
 803                 int num_ports = cvmx_helper_ports_on_interface(interface);
 804                 int port;
 805                 int port_index;
 806
 807                 for (port_index = 0,
 808                      port = cvmx_helper_get_ipd_port(interface, 0);
 809                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 810                      port_index++, port++) {
 811                         struct octeon_ethernet *priv;
 812                         struct net_device *dev =
 813                             alloc_etherdev(sizeof(struct octeon_ethernet));
 814                         if (!dev) {
 815                                 pr_err("Failed to allocate ethernet device for port %d\n",
 816                                        port);
 817                                 continue;
 818                         }
 819
 820                         /* Initialize the device private structure. */
 821                         SET_NETDEV_DEV(dev, &pdev->dev);
 822                         priv = netdev_priv(dev);
 823                         priv->netdev = dev;
 824                         priv->of_node = cvm_oct_node_for_port(pip, interface,
 825                                                               port_index);
 826
 827                         INIT_DELAYED_WORK(&priv->port_periodic_work,
 828                                           cvm_oct_periodic_worker);
 829                         priv->imode = imode;
 830                         priv->port = port;
 831                         priv->queue = cvmx_pko_get_base_queue(priv->port);
 832                         priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
 833                         priv->phy_mode = PHY_INTERFACE_MODE_NA;
 834                         for (qos = 0; qos < 16; qos++)
 835                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 836                         for (qos = 0; qos < cvmx_pko_get_num_queues(port);
 837                              qos++)
 838                                 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
 839                         dev->min_mtu = VLAN_ETH_ZLEN - mtu_overhead;
 840                         dev->max_mtu = OCTEON_MAX_MTU - mtu_overhead;
 841
 842                         switch (priv->imode) {
 843                         /* These types don't support ports to IPD/PKO */
 844                         case CVMX_HELPER_INTERFACE_MODE_DISABLED:
 845                         case CVMX_HELPER_INTERFACE_MODE_PCIE:
 846                         case CVMX_HELPER_INTERFACE_MODE_PICMG:
 847                                 break;
 848
 849                         case CVMX_HELPER_INTERFACE_MODE_NPI:
 850                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 851                                 strscpy(dev->name, "npi%d", sizeof(dev->name));
 852                                 break;
 853
 854                         case CVMX_HELPER_INTERFACE_MODE_XAUI:
 855                                 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
 856                                 strscpy(dev->name, "xaui%d", sizeof(dev->name));
 857                                 break;
 858
 859                         case CVMX_HELPER_INTERFACE_MODE_LOOP:
 860                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 861                                 strscpy(dev->name, "loop%d", sizeof(dev->name));
 862                                 break;
 863
 864                         case CVMX_HELPER_INTERFACE_MODE_SGMII:
 865                                 priv->phy_mode = PHY_INTERFACE_MODE_SGMII;
 866                                 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
 867                                 strscpy(dev->name, "eth%d", sizeof(dev->name));
 868                                 break;
 869
 870                         case CVMX_HELPER_INTERFACE_MODE_SPI:
 871                                 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
 872                                 strscpy(dev->name, "spi%d", sizeof(dev->name));
 873                                 break;
 874
 875                         case CVMX_HELPER_INTERFACE_MODE_GMII:
 876                                 priv->phy_mode = PHY_INTERFACE_MODE_GMII;
 877                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 878                                 strscpy(dev->name, "eth%d", sizeof(dev->name));
 879                                 break;
 880
 881                         case CVMX_HELPER_INTERFACE_MODE_RGMII:
 882                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 883                                 strscpy(dev->name, "eth%d", sizeof(dev->name));
 884                                 cvm_set_rgmii_delay(priv, interface,
 885                                                     port_index);
 886                                 break;
 887                         }
 888
 889                         if (priv->of_node && of_phy_is_fixed_link(priv->of_node)) {
 890                                 if (of_phy_register_fixed_link(priv->of_node)) {
 891                                         netdev_err(dev, "Failed to register fixed link for interface %d, port %d\n",
 892                                                    interface, priv->port);
 893                                         dev->netdev_ops = NULL;
 894                                 }
 895                         }
 896
 897                         if (!dev->netdev_ops) {
 898                                 free_netdev(dev);
 899                         } else if (register_netdev(dev) < 0) {
 900                                 pr_err("Failed to register ethernet device for interface %d, port %d\n",
 901                                        interface, priv->port);
 902                                 free_netdev(dev);
 903                         } else {
 904                                 cvm_oct_device[priv->port] = dev;
 905                                 fau -=
 906                                     cvmx_pko_get_num_queues(priv->port) *
 907                                     sizeof(u32);
 908                                 schedule_delayed_work(&priv->port_periodic_work,
 909                                                       HZ);
 910                         }
 911                 }
 912         }
 913
 914         cvm_oct_tx_initialize();
 915         cvm_oct_rx_initialize();
 916
 917         /*
 918          * 150 uS: about 10 1500-byte packets at 1GE.
 919          */
 920         cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
 921
 922         schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 923
 924         return 0;
 925 }
 926
 927 static int cvm_oct_remove(struct platform_device *pdev)
 928 {
 929         int port;
 930
 931         cvmx_ipd_disable();
 932
 933         atomic_inc_return(&cvm_oct_poll_queue_stopping);
 934         cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
 935
 936         cvm_oct_rx_shutdown();
 937         cvm_oct_tx_shutdown();
 938
 939         cvmx_pko_disable();
 940
 941         /* Free the ethernet devices */
 942         for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
 943                 if (cvm_oct_device[port]) {
 944                         struct net_device *dev = cvm_oct_device[port];
 945                         struct octeon_ethernet *priv = netdev_priv(dev);
 946
 947                         cancel_delayed_work_sync(&priv->port_periodic_work);
 948
 949                         cvm_oct_tx_shutdown_dev(dev);
 950                         unregister_netdev(dev);
 951                         free_netdev(dev);
 952                         cvm_oct_device[port] = NULL;
 953                 }
 954         }
 955
 956         cvmx_pko_shutdown();
 957
 958         cvmx_ipd_free_ptr();
 959
 960         /* Free the HW pools */
 961         cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 962                               num_packet_buffers);
 963         cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 964                               num_packet_buffers);
 965         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 966                 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 967                                       CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
 968         return 0;
 969 }
 970
 971 static const struct of_device_id cvm_oct_match[] = {
 972         {
 973                 .compatible = "cavium,octeon-3860-pip",
 974         },
 975         {},
 976 };
 977 MODULE_DEVICE_TABLE(of, cvm_oct_match);
 978
 979 static struct platform_driver cvm_oct_driver = {
 980         .probe          = cvm_oct_probe,
 981         .remove         = cvm_oct_remove,
 982         .driver         = {
 983                 .name   = KBUILD_MODNAME,
 984                 .of_match_table = cvm_oct_match,
 985         },
 986 };
 987
 988 module_platform_driver(cvm_oct_driver);
 989
 990 MODULE_SOFTDEP("pre: mdio-cavium");
 991 MODULE_LICENSE("GPL");
 992 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
 993 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");