drivers/staging/octeon/ethernet.c

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