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
  21 #include <net/dst.h>
  22
  23 #include <asm/octeon/octeon.h>
  24
  25 #include "ethernet-defines.h"
  26 #include "octeon-ethernet.h"
  27 #include "ethernet-mem.h"
  28 #include "ethernet-rx.h"
  29 #include "ethernet-tx.h"
  30 #include "ethernet-mdio.h"
  31 #include "ethernet-util.h"
  32
  33 #include <asm/octeon/cvmx-pip.h>
  34 #include <asm/octeon/cvmx-pko.h>
  35 #include <asm/octeon/cvmx-fau.h>
  36 #include <asm/octeon/cvmx-ipd.h>
  37 #include <asm/octeon/cvmx-helper.h>
  38
  39 #include <asm/octeon/cvmx-gmxx-defs.h>
  40 #include <asm/octeon/cvmx-smix-defs.h>
  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 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 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
  90 /*
  91  * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
  92  *
  93  * Set to one right before cvm_oct_poll_queue is destroyed.
  94  */
  95 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
  96
  97 /*
  98  * Array of every ethernet device owned by this driver indexed by
  99  * the ipd input port number.
 100  */
 101 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
 102
 103 u64 cvm_oct_tx_poll_interval;
 104
 105 static void cvm_oct_rx_refill_worker(struct work_struct *work);
 106 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
 107
 108 static void cvm_oct_rx_refill_worker(struct work_struct *work)
 109 {
 110         /*
 111          * FPA 0 may have been drained, try to refill it if we need
 112          * more than num_packet_buffers / 2, otherwise normal receive
 113          * processing will refill it.  If it were drained, no packets
 114          * could be received so cvm_oct_napi_poll would never be
 115          * invoked to do the refill.
 116          */
 117         cvm_oct_rx_refill_pool(num_packet_buffers / 2);
 118
 119         if (!atomic_read(&cvm_oct_poll_queue_stopping))
 120                 schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 121 }
 122
 123 static void cvm_oct_periodic_worker(struct work_struct *work)
 124 {
 125         struct octeon_ethernet *priv = container_of(work,
 126                                                     struct octeon_ethernet,
 127                                                     port_periodic_work.work);
 128
 129         if (priv->poll)
 130                 priv->poll(cvm_oct_device[priv->port]);
 131
 132         cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats(
 133                                                 cvm_oct_device[priv->port]);
 134
 135         if (!atomic_read(&cvm_oct_poll_queue_stopping))
 136                 schedule_delayed_work(&priv->port_periodic_work, HZ);
 137 }
 138
 139 static void cvm_oct_configure_common_hw(void)
 140 {
 141         /* Setup the FPA */
 142         cvmx_fpa_enable();
 143         cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 144                              num_packet_buffers);
 145         cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 146                              num_packet_buffers);
 147         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 148                 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 149                                      CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 1024);
 150
 151 #ifdef __LITTLE_ENDIAN
 152         {
 153                 union cvmx_ipd_ctl_status ipd_ctl_status;
 154
 155                 ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 156                 ipd_ctl_status.s.pkt_lend = 1;
 157                 ipd_ctl_status.s.wqe_lend = 1;
 158                 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
 159         }
 160 #endif
 161
 162         cvmx_helper_setup_red(num_packet_buffers / 4, num_packet_buffers / 8);
 163 }
 164
 165 /**
 166  * cvm_oct_free_work- Free a work queue entry
 167  *
 168  * @work_queue_entry: Work queue entry to free
 169  *
 170  * Returns Zero on success, Negative on failure.
 171  */
 172 int cvm_oct_free_work(void *work_queue_entry)
 173 {
 174         cvmx_wqe_t *work = work_queue_entry;
 175
 176         int segments = work->word2.s.bufs;
 177         union cvmx_buf_ptr segment_ptr = work->packet_ptr;
 178
 179         while (segments--) {
 180                 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
 181                         cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
 182                 if (unlikely(!segment_ptr.s.i))
 183                         cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
 184                                       segment_ptr.s.pool,
 185                                       CVMX_FPA_PACKET_POOL_SIZE / 128);
 186                 segment_ptr = next_ptr;
 187         }
 188         cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, 1);
 189
 190         return 0;
 191 }
 192 EXPORT_SYMBOL(cvm_oct_free_work);
 193
 194 /**
 195  * cvm_oct_common_get_stats - get the low level ethernet statistics
 196  * @dev:    Device to get the statistics from
 197  *
 198  * Returns Pointer to the statistics
 199  */
 200 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
 201 {
 202         cvmx_pip_port_status_t rx_status;
 203         cvmx_pko_port_status_t tx_status;
 204         struct octeon_ethernet *priv = netdev_priv(dev);
 205
 206         if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
 207                 if (octeon_is_simulation()) {
 208                         /* The simulator doesn't support statistics */
 209                         memset(&rx_status, 0, sizeof(rx_status));
 210                         memset(&tx_status, 0, sizeof(tx_status));
 211                 } else {
 212                         cvmx_pip_get_port_status(priv->port, 1, &rx_status);
 213                         cvmx_pko_get_port_status(priv->port, 1, &tx_status);
 214                 }
 215
 216                 priv->stats.rx_packets += rx_status.inb_packets;
 217                 priv->stats.tx_packets += tx_status.packets;
 218                 priv->stats.rx_bytes += rx_status.inb_octets;
 219                 priv->stats.tx_bytes += tx_status.octets;
 220                 priv->stats.multicast += rx_status.multicast_packets;
 221                 priv->stats.rx_crc_errors += rx_status.inb_errors;
 222                 priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
 223                 priv->stats.rx_dropped += rx_status.dropped_packets;
 224         }
 225
 226         return &priv->stats;
 227 }
 228
 229 /**
 230  * cvm_oct_common_change_mtu - change the link MTU
 231  * @dev:     Device to change
 232  * @new_mtu: The new MTU
 233  *
 234  * Returns Zero on success
 235  */
 236 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
 237 {
 238         struct octeon_ethernet *priv = netdev_priv(dev);
 239         int interface = INTERFACE(priv->port);
 240 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
 241         int vlan_bytes = 4;
 242 #else
 243         int vlan_bytes = 0;
 244 #endif
 245
 246         /*
 247          * Limit the MTU to make sure the ethernet packets are between
 248          * 64 bytes and 65535 bytes.
 249          */
 250         if ((new_mtu + 14 + 4 + vlan_bytes < 64) ||
 251             (new_mtu + 14 + 4 + vlan_bytes > 65392)) {
 252                 pr_err("MTU must be between %d and %d.\n",
 253                        64 - 14 - 4 - vlan_bytes, 65392 - 14 - 4 - vlan_bytes);
 254                 return -EINVAL;
 255         }
 256         dev->mtu = new_mtu;
 257
 258         if ((interface < 2) &&
 259             (cvmx_helper_interface_get_mode(interface) !=
 260                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 261                 int index = INDEX(priv->port);
 262                 /* Add ethernet header and FCS, and VLAN if configured. */
 263                 int max_packet = new_mtu + 14 + 4 + vlan_bytes;
 264
 265                 if (OCTEON_IS_MODEL(OCTEON_CN3XXX) ||
 266                     OCTEON_IS_MODEL(OCTEON_CN58XX)) {
 267                         /* Signal errors on packets larger than the MTU */
 268                         cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
 269                                        max_packet);
 270                 } else {
 271                         /*
 272                          * Set the hardware to truncate packets larger
 273                          * than the MTU and smaller the 64 bytes.
 274                          */
 275                         union cvmx_pip_frm_len_chkx frm_len_chk;
 276
 277                         frm_len_chk.u64 = 0;
 278                         frm_len_chk.s.minlen = 64;
 279                         frm_len_chk.s.maxlen = max_packet;
 280                         cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
 281                                        frm_len_chk.u64);
 282                 }
 283                 /*
 284                  * Set the hardware to truncate packets larger than
 285                  * the MTU. The jabber register must be set to a
 286                  * multiple of 8 bytes, so round up.
 287                  */
 288                 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
 289                                (max_packet + 7) & ~7u);
 290         }
 291         return 0;
 292 }
 293
 294 /**
 295  * cvm_oct_common_set_multicast_list - set the multicast list
 296  * @dev:    Device to work on
 297  */
 298 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
 299 {
 300         union cvmx_gmxx_prtx_cfg gmx_cfg;
 301         struct octeon_ethernet *priv = netdev_priv(dev);
 302         int interface = INTERFACE(priv->port);
 303
 304         if ((interface < 2) &&
 305             (cvmx_helper_interface_get_mode(interface) !=
 306                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 307                 union cvmx_gmxx_rxx_adr_ctl control;
 308                 int index = INDEX(priv->port);
 309
 310                 control.u64 = 0;
 311                 control.s.bcst = 1;     /* Allow broadcast MAC addresses */
 312
 313                 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
 314                     (dev->flags & IFF_PROMISC))
 315                         /* Force accept multicast packets */
 316                         control.s.mcst = 2;
 317                 else
 318                         /* Force reject multicast packets */
 319                         control.s.mcst = 1;
 320
 321                 if (dev->flags & IFF_PROMISC)
 322                         /*
 323                          * Reject matches if promisc. Since CAM is
 324                          * shut off, should accept everything.
 325                          */
 326                         control.s.cam_mode = 0;
 327                 else
 328                         /* Filter packets based on the CAM */
 329                         control.s.cam_mode = 1;
 330
 331                 gmx_cfg.u64 =
 332                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 333                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 334                                gmx_cfg.u64 & ~1ull);
 335
 336                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
 337                                control.u64);
 338                 if (dev->flags & IFF_PROMISC)
 339                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 340                                        (index, interface), 0);
 341                 else
 342                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 343                                        (index, interface), 1);
 344
 345                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 346                                gmx_cfg.u64);
 347         }
 348 }
 349
 350 static int cvm_oct_set_mac_filter(struct net_device *dev)
 351 {
 352         struct octeon_ethernet *priv = netdev_priv(dev);
 353         union cvmx_gmxx_prtx_cfg gmx_cfg;
 354         int interface = INTERFACE(priv->port);
 355
 356         if ((interface < 2) &&
 357             (cvmx_helper_interface_get_mode(interface) !=
 358                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 359                 int i;
 360                 u8 *ptr = dev->dev_addr;
 361                 u64 mac = 0;
 362                 int index = INDEX(priv->port);
 363
 364                 for (i = 0; i < 6; i++)
 365                         mac = (mac << 8) | (u64)ptr[i];
 366
 367                 gmx_cfg.u64 =
 368                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 369                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 370                                gmx_cfg.u64 & ~1ull);
 371
 372                 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
 373                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
 374                                ptr[0]);
 375                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
 376                                ptr[1]);
 377                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
 378                                ptr[2]);
 379                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
 380                                ptr[3]);
 381                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
 382                                ptr[4]);
 383                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
 384                                ptr[5]);
 385                 cvm_oct_common_set_multicast_list(dev);
 386                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 387                                gmx_cfg.u64);
 388         }
 389         return 0;
 390 }
 391
 392 /**
 393  * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
 394  * @dev:    The device in question.
 395  * @addr:   Socket address.
 396  *
 397  * Returns Zero on success
 398  */
 399 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
 400 {
 401         int r = eth_mac_addr(dev, addr);
 402
 403         if (r)
 404                 return r;
 405         return cvm_oct_set_mac_filter(dev);
 406 }
 407
 408 /**
 409  * cvm_oct_common_init - per network device initialization
 410  * @dev:    Device to initialize
 411  *
 412  * Returns Zero on success
 413  */
 414 int cvm_oct_common_init(struct net_device *dev)
 415 {
 416         struct octeon_ethernet *priv = netdev_priv(dev);
 417         const u8 *mac = NULL;
 418
 419         if (priv->of_node)
 420                 mac = of_get_mac_address(priv->of_node);
 421
 422         if (mac)
 423                 ether_addr_copy(dev->dev_addr, mac);
 424         else
 425                 eth_hw_addr_random(dev);
 426
 427         /*
 428          * Force the interface to use the POW send if always_use_pow
 429          * was specified or it is in the pow send list.
 430          */
 431         if ((pow_send_group != -1) &&
 432             (always_use_pow || strstr(pow_send_list, dev->name)))
 433                 priv->queue = -1;
 434
 435         if (priv->queue != -1)
 436                 dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
 437
 438         /* We do our own locking, Linux doesn't need to */
 439         dev->features |= NETIF_F_LLTX;
 440         dev->ethtool_ops = &cvm_oct_ethtool_ops;
 441
 442         cvm_oct_set_mac_filter(dev);
 443         dev->netdev_ops->ndo_change_mtu(dev, dev->mtu);
 444
 445         /*
 446          * Zero out stats for port so we won't mistakenly show
 447          * counters from the bootloader.
 448          */
 449         memset(dev->netdev_ops->ndo_get_stats(dev), 0,
 450                sizeof(struct net_device_stats));
 451
 452         if (dev->netdev_ops->ndo_stop)
 453                 dev->netdev_ops->ndo_stop(dev);
 454
 455         return 0;
 456 }
 457
 458 void cvm_oct_common_uninit(struct net_device *dev)
 459 {
 460         if (dev->phydev)
 461                 phy_disconnect(dev->phydev);
 462 }
 463
 464 int cvm_oct_common_open(struct net_device *dev,
 465                         void (*link_poll)(struct net_device *))
 466 {
 467         union cvmx_gmxx_prtx_cfg gmx_cfg;
 468         struct octeon_ethernet *priv = netdev_priv(dev);
 469         int interface = INTERFACE(priv->port);
 470         int index = INDEX(priv->port);
 471         cvmx_helper_link_info_t link_info;
 472         int rv;
 473
 474         rv = cvm_oct_phy_setup_device(dev);
 475         if (rv)
 476                 return rv;
 477
 478         gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 479         gmx_cfg.s.en = 1;
 480         cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
 481
 482         if (octeon_is_simulation())
 483                 return 0;
 484
 485         if (dev->phydev) {
 486                 int r = phy_read_status(dev->phydev);
 487
 488                 if (r == 0 && dev->phydev->link == 0)
 489                         netif_carrier_off(dev);
 490                 cvm_oct_adjust_link(dev);
 491         } else {
 492                 link_info = cvmx_helper_link_get(priv->port);
 493                 if (!link_info.s.link_up)
 494                         netif_carrier_off(dev);
 495                 priv->poll = link_poll;
 496                 link_poll(dev);
 497         }
 498
 499         return 0;
 500 }
 501
 502 void cvm_oct_link_poll(struct net_device *dev)
 503 {
 504         struct octeon_ethernet *priv = netdev_priv(dev);
 505         cvmx_helper_link_info_t link_info;
 506
 507         link_info = cvmx_helper_link_get(priv->port);
 508         if (link_info.u64 == priv->link_info)
 509                 return;
 510
 511         link_info = cvmx_helper_link_autoconf(priv->port);
 512         priv->link_info = link_info.u64;
 513
 514         if (link_info.s.link_up) {
 515                 if (!netif_carrier_ok(dev))
 516                         netif_carrier_on(dev);
 517         } else if (netif_carrier_ok(dev)) {
 518                 netif_carrier_off(dev);
 519         }
 520         cvm_oct_note_carrier(priv, link_info);
 521 }
 522
 523 static int cvm_oct_xaui_open(struct net_device *dev)
 524 {
 525         return cvm_oct_common_open(dev, cvm_oct_link_poll);
 526 }
 527
 528 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
 529         .ndo_init               = cvm_oct_common_init,
 530         .ndo_uninit             = cvm_oct_common_uninit,
 531         .ndo_start_xmit         = cvm_oct_xmit,
 532         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 533         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 534         .ndo_do_ioctl           = cvm_oct_ioctl,
 535         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 536         .ndo_get_stats          = cvm_oct_common_get_stats,
 537 #ifdef CONFIG_NET_POLL_CONTROLLER
 538         .ndo_poll_controller    = cvm_oct_poll_controller,
 539 #endif
 540 };
 541
 542 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
 543         .ndo_init               = cvm_oct_common_init,
 544         .ndo_uninit             = cvm_oct_common_uninit,
 545         .ndo_open               = cvm_oct_xaui_open,
 546         .ndo_stop               = cvm_oct_common_stop,
 547         .ndo_start_xmit         = cvm_oct_xmit,
 548         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 549         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 550         .ndo_do_ioctl           = cvm_oct_ioctl,
 551         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 552         .ndo_get_stats          = cvm_oct_common_get_stats,
 553 #ifdef CONFIG_NET_POLL_CONTROLLER
 554         .ndo_poll_controller    = cvm_oct_poll_controller,
 555 #endif
 556 };
 557
 558 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
 559         .ndo_init               = cvm_oct_sgmii_init,
 560         .ndo_uninit             = cvm_oct_common_uninit,
 561         .ndo_open               = cvm_oct_sgmii_open,
 562         .ndo_stop               = cvm_oct_common_stop,
 563         .ndo_start_xmit         = cvm_oct_xmit,
 564         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 565         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 566         .ndo_do_ioctl           = cvm_oct_ioctl,
 567         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 568         .ndo_get_stats          = cvm_oct_common_get_stats,
 569 #ifdef CONFIG_NET_POLL_CONTROLLER
 570         .ndo_poll_controller    = cvm_oct_poll_controller,
 571 #endif
 572 };
 573
 574 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
 575         .ndo_init               = cvm_oct_spi_init,
 576         .ndo_uninit             = cvm_oct_spi_uninit,
 577         .ndo_start_xmit         = cvm_oct_xmit,
 578         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 579         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 580         .ndo_do_ioctl           = cvm_oct_ioctl,
 581         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 582         .ndo_get_stats          = cvm_oct_common_get_stats,
 583 #ifdef CONFIG_NET_POLL_CONTROLLER
 584         .ndo_poll_controller    = cvm_oct_poll_controller,
 585 #endif
 586 };
 587
 588 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
 589         .ndo_init               = cvm_oct_common_init,
 590         .ndo_uninit             = cvm_oct_common_uninit,
 591         .ndo_open               = cvm_oct_rgmii_open,
 592         .ndo_stop               = cvm_oct_common_stop,
 593         .ndo_start_xmit         = cvm_oct_xmit,
 594         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 595         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 596         .ndo_do_ioctl           = cvm_oct_ioctl,
 597         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 598         .ndo_get_stats          = cvm_oct_common_get_stats,
 599 #ifdef CONFIG_NET_POLL_CONTROLLER
 600         .ndo_poll_controller    = cvm_oct_poll_controller,
 601 #endif
 602 };
 603
 604 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
 605         .ndo_init               = cvm_oct_common_init,
 606         .ndo_start_xmit         = cvm_oct_xmit_pow,
 607         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 608         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 609         .ndo_do_ioctl           = cvm_oct_ioctl,
 610         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 611         .ndo_get_stats          = cvm_oct_common_get_stats,
 612 #ifdef CONFIG_NET_POLL_CONTROLLER
 613         .ndo_poll_controller    = cvm_oct_poll_controller,
 614 #endif
 615 };
 616
 617 static struct device_node *cvm_oct_of_get_child(
 618                                 const struct device_node *parent, int reg_val)
 619 {
 620         struct device_node *node = NULL;
 621         int size;
 622         const __be32 *addr;
 623
 624         for (;;) {
 625                 node = of_get_next_child(parent, node);
 626                 if (!node)
 627                         break;
 628                 addr = of_get_property(node, "reg", &size);
 629                 if (addr && (be32_to_cpu(*addr) == reg_val))
 630                         break;
 631         }
 632         return node;
 633 }
 634
 635 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
 636                                                  int interface, int port)
 637 {
 638         struct device_node *ni, *np;
 639
 640         ni = cvm_oct_of_get_child(pip, interface);
 641         if (!ni)
 642                 return NULL;
 643
 644         np = cvm_oct_of_get_child(ni, port);
 645         of_node_put(ni);
 646
 647         return np;
 648 }
 649
 650 static int cvm_oct_probe(struct platform_device *pdev)
 651 {
 652         int num_interfaces;
 653         int interface;
 654         int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
 655         int qos;
 656         struct device_node *pip;
 657
 658         octeon_mdiobus_force_mod_depencency();
 659
 660         pip = pdev->dev.of_node;
 661         if (!pip) {
 662                 pr_err("Error: No 'pip' in /aliases\n");
 663                 return -EINVAL;
 664         }
 665
 666
 667         cvm_oct_configure_common_hw();
 668
 669         cvmx_helper_initialize_packet_io_global();
 670
 671         /* Change the input group for all ports before input is enabled */
 672         num_interfaces = cvmx_helper_get_number_of_interfaces();
 673         for (interface = 0; interface < num_interfaces; interface++) {
 674                 int num_ports = cvmx_helper_ports_on_interface(interface);
 675                 int port;
 676
 677                 for (port = cvmx_helper_get_ipd_port(interface, 0);
 678                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 679                      port++) {
 680                         union cvmx_pip_prt_tagx pip_prt_tagx;
 681
 682                         pip_prt_tagx.u64 =
 683                             cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
 684                         pip_prt_tagx.s.grp = pow_receive_group;
 685                         cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
 686                                        pip_prt_tagx.u64);
 687                 }
 688         }
 689
 690         cvmx_helper_ipd_and_packet_input_enable();
 691
 692         memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
 693
 694         /*
 695          * Initialize the FAU used for counting packet buffers that
 696          * need to be freed.
 697          */
 698         cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
 699
 700         /* Initialize the FAU used for counting tx SKBs that need to be freed */
 701         cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
 702
 703         if ((pow_send_group != -1)) {
 704                 struct net_device *dev;
 705
 706                 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
 707                 if (dev) {
 708                         /* Initialize the device private structure. */
 709                         struct octeon_ethernet *priv = netdev_priv(dev);
 710
 711                         dev->netdev_ops = &cvm_oct_pow_netdev_ops;
 712                         priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
 713                         priv->port = CVMX_PIP_NUM_INPUT_PORTS;
 714                         priv->queue = -1;
 715                         strcpy(dev->name, "pow%d");
 716                         for (qos = 0; qos < 16; qos++)
 717                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 718
 719                         if (register_netdev(dev) < 0) {
 720                                 pr_err("Failed to register ethernet device for POW\n");
 721                                 free_netdev(dev);
 722                         } else {
 723                                 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
 724                                 pr_info("%s: POW send group %d, receive group %d\n",
 725                                         dev->name, pow_send_group,
 726                                         pow_receive_group);
 727                         }
 728                 } else {
 729                         pr_err("Failed to allocate ethernet device for POW\n");
 730                 }
 731         }
 732
 733         num_interfaces = cvmx_helper_get_number_of_interfaces();
 734         for (interface = 0; interface < num_interfaces; interface++) {
 735                 cvmx_helper_interface_mode_t imode =
 736                     cvmx_helper_interface_get_mode(interface);
 737                 int num_ports = cvmx_helper_ports_on_interface(interface);
 738                 int port;
 739                 int port_index;
 740
 741                 for (port_index = 0,
 742                      port = cvmx_helper_get_ipd_port(interface, 0);
 743                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 744                      port_index++, port++) {
 745                         struct octeon_ethernet *priv;
 746                         struct net_device *dev =
 747                             alloc_etherdev(sizeof(struct octeon_ethernet));
 748                         if (!dev) {
 749                                 pr_err("Failed to allocate ethernet device for port %d\n",
 750                                        port);
 751                                 continue;
 752                         }
 753
 754                         /* Initialize the device private structure. */
 755                         priv = netdev_priv(dev);
 756                         priv->netdev = dev;
 757                         priv->of_node = cvm_oct_node_for_port(pip, interface,
 758                                                                 port_index);
 759
 760                         INIT_DELAYED_WORK(&priv->port_periodic_work,
 761                                           cvm_oct_periodic_worker);
 762                         priv->imode = imode;
 763                         priv->port = port;
 764                         priv->queue = cvmx_pko_get_base_queue(priv->port);
 765                         priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
 766                         for (qos = 0; qos < 16; qos++)
 767                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 768                         for (qos = 0; qos < cvmx_pko_get_num_queues(port);
 769                              qos++)
 770                                 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
 771
 772                         switch (priv->imode) {
 773                         /* These types don't support ports to IPD/PKO */
 774                         case CVMX_HELPER_INTERFACE_MODE_DISABLED:
 775                         case CVMX_HELPER_INTERFACE_MODE_PCIE:
 776                         case CVMX_HELPER_INTERFACE_MODE_PICMG:
 777                                 break;
 778
 779                         case CVMX_HELPER_INTERFACE_MODE_NPI:
 780                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 781                                 strcpy(dev->name, "npi%d");
 782                                 break;
 783
 784                         case CVMX_HELPER_INTERFACE_MODE_XAUI:
 785                                 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
 786                                 strcpy(dev->name, "xaui%d");
 787                                 break;
 788
 789                         case CVMX_HELPER_INTERFACE_MODE_LOOP:
 790                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 791                                 strcpy(dev->name, "loop%d");
 792                                 break;
 793
 794                         case CVMX_HELPER_INTERFACE_MODE_SGMII:
 795                                 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
 796                                 strcpy(dev->name, "eth%d");
 797                                 break;
 798
 799                         case CVMX_HELPER_INTERFACE_MODE_SPI:
 800                                 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
 801                                 strcpy(dev->name, "spi%d");
 802                                 break;
 803
 804                         case CVMX_HELPER_INTERFACE_MODE_RGMII:
 805                         case CVMX_HELPER_INTERFACE_MODE_GMII:
 806                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 807                                 strcpy(dev->name, "eth%d");
 808                                 break;
 809                         }
 810
 811                         if (!dev->netdev_ops) {
 812                                 free_netdev(dev);
 813                         } else if (register_netdev(dev) < 0) {
 814                                 pr_err("Failed to register ethernet device for interface %d, port %d\n",
 815                                        interface, priv->port);
 816                                 free_netdev(dev);
 817                         } else {
 818                                 cvm_oct_device[priv->port] = dev;
 819                                 fau -=
 820                                     cvmx_pko_get_num_queues(priv->port) *
 821                                     sizeof(u32);
 822                                 schedule_delayed_work(&priv->port_periodic_work, HZ);
 823                         }
 824                 }
 825         }
 826
 827         cvm_oct_tx_initialize();
 828         cvm_oct_rx_initialize();
 829
 830         /*
 831          * 150 uS: about 10 1500-byte packets at 1GE.
 832          */
 833         cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
 834
 835         schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 836
 837         return 0;
 838 }
 839
 840 static int cvm_oct_remove(struct platform_device *pdev)
 841 {
 842         int port;
 843
 844         /* Disable POW interrupt */
 845         if (OCTEON_IS_MODEL(OCTEON_CN68XX))
 846                 cvmx_write_csr(CVMX_SSO_WQ_INT_THRX(pow_receive_group), 0);
 847         else
 848                 cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), 0);
 849
 850         cvmx_ipd_disable();
 851
 852         /* Free the interrupt handler */
 853         free_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, cvm_oct_device);
 854
 855         atomic_inc_return(&cvm_oct_poll_queue_stopping);
 856         cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
 857
 858         cvm_oct_rx_shutdown();
 859         cvm_oct_tx_shutdown();
 860
 861         cvmx_pko_disable();
 862
 863         /* Free the ethernet devices */
 864         for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
 865                 if (cvm_oct_device[port]) {
 866                         struct net_device *dev = cvm_oct_device[port];
 867                         struct octeon_ethernet *priv = netdev_priv(dev);
 868
 869                         cancel_delayed_work_sync(&priv->port_periodic_work);
 870
 871                         cvm_oct_tx_shutdown_dev(dev);
 872                         unregister_netdev(dev);
 873                         free_netdev(dev);
 874                         cvm_oct_device[port] = NULL;
 875                 }
 876         }
 877
 878
 879         cvmx_pko_shutdown();
 880
 881         cvmx_ipd_free_ptr();
 882
 883         /* Free the HW pools */
 884         cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 885                               num_packet_buffers);
 886         cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 887                               num_packet_buffers);
 888         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 889                 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 890                                       CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
 891         return 0;
 892 }
 893
 894 static const struct of_device_id cvm_oct_match[] = {
 895         {
 896                 .compatible = "cavium,octeon-3860-pip",
 897         },
 898         {},
 899 };
 900 MODULE_DEVICE_TABLE(of, cvm_oct_match);
 901
 902 static struct platform_driver cvm_oct_driver = {
 903         .probe          = cvm_oct_probe,
 904         .remove         = cvm_oct_remove,
 905         .driver         = {
 906                 .name   = KBUILD_MODNAME,
 907                 .of_match_table = cvm_oct_match,
 908         },
 909 };
 910
 911 module_platform_driver(cvm_oct_driver);
 912
 913 MODULE_LICENSE("GPL");
 914 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
 915 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");