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 #include <asm/octeon/cvmx-asxx-defs.h>
  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 static int pow_receive_group = 15;
  49 module_param(pow_receive_group, int, 0444);
  50 MODULE_PARM_DESC(pow_receive_group, "\n"
  51         "\tPOW group to receive packets from. All ethernet hardware\n"
  52         "\twill be configured to send incoming packets to this POW\n"
  53         "\tgroup. Also any other software can submit packets to this\n"
  54         "\tgroup for the kernel to process.");
  55
  56 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         cvmx_wqe_t *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                 priv->stats.rx_packets += rx_status.inb_packets;
 219                 priv->stats.tx_packets += tx_status.packets;
 220                 priv->stats.rx_bytes += rx_status.inb_octets;
 221                 priv->stats.tx_bytes += tx_status.octets;
 222                 priv->stats.multicast += rx_status.multicast_packets;
 223                 priv->stats.rx_crc_errors += rx_status.inb_errors;
 224                 priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
 225                 priv->stats.rx_dropped += rx_status.dropped_packets;
 226         }
 227
 228         return &priv->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 defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
 243         int vlan_bytes = 4;
 244 #else
 245         int vlan_bytes = 0;
 246 #endif
 247
 248         /*
 249          * Limit the MTU to make sure the ethernet packets are between
 250          * 64 bytes and 65535 bytes.
 251          */
 252         if ((new_mtu + 14 + 4 + vlan_bytes < 64) ||
 253             (new_mtu + 14 + 4 + vlan_bytes > 65392)) {
 254                 pr_err("MTU must be between %d and %d.\n",
 255                        64 - 14 - 4 - vlan_bytes, 65392 - 14 - 4 - vlan_bytes);
 256                 return -EINVAL;
 257         }
 258         dev->mtu = new_mtu;
 259
 260         if ((interface < 2) &&
 261             (cvmx_helper_interface_get_mode(interface) !=
 262                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 263                 int index = INDEX(priv->port);
 264                 /* Add ethernet header and FCS, and VLAN if configured. */
 265                 int max_packet = new_mtu + 14 + 4 + vlan_bytes;
 266
 267                 if (OCTEON_IS_MODEL(OCTEON_CN3XXX) ||
 268                     OCTEON_IS_MODEL(OCTEON_CN58XX)) {
 269                         /* Signal errors on packets larger than the MTU */
 270                         cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
 271                                        max_packet);
 272                 } else {
 273                         /*
 274                          * Set the hardware to truncate packets larger
 275                          * than the MTU and smaller the 64 bytes.
 276                          */
 277                         union cvmx_pip_frm_len_chkx frm_len_chk;
 278
 279                         frm_len_chk.u64 = 0;
 280                         frm_len_chk.s.minlen = 64;
 281                         frm_len_chk.s.maxlen = max_packet;
 282                         cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
 283                                        frm_len_chk.u64);
 284                 }
 285                 /*
 286                  * Set the hardware to truncate packets larger than
 287                  * the MTU. The jabber register must be set to a
 288                  * multiple of 8 bytes, so round up.
 289                  */
 290                 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
 291                                (max_packet + 7) & ~7u);
 292         }
 293         return 0;
 294 }
 295
 296 /**
 297  * cvm_oct_common_set_multicast_list - set the multicast list
 298  * @dev:    Device to work on
 299  */
 300 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
 301 {
 302         union cvmx_gmxx_prtx_cfg gmx_cfg;
 303         struct octeon_ethernet *priv = netdev_priv(dev);
 304         int interface = INTERFACE(priv->port);
 305
 306         if ((interface < 2) &&
 307             (cvmx_helper_interface_get_mode(interface) !=
 308                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 309                 union cvmx_gmxx_rxx_adr_ctl control;
 310                 int index = INDEX(priv->port);
 311
 312                 control.u64 = 0;
 313                 control.s.bcst = 1;     /* Allow broadcast MAC addresses */
 314
 315                 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
 316                     (dev->flags & IFF_PROMISC))
 317                         /* Force accept multicast packets */
 318                         control.s.mcst = 2;
 319                 else
 320                         /* Force reject multicast packets */
 321                         control.s.mcst = 1;
 322
 323                 if (dev->flags & IFF_PROMISC)
 324                         /*
 325                          * Reject matches if promisc. Since CAM is
 326                          * shut off, should accept everything.
 327                          */
 328                         control.s.cam_mode = 0;
 329                 else
 330                         /* Filter packets based on the CAM */
 331                         control.s.cam_mode = 1;
 332
 333                 gmx_cfg.u64 =
 334                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 335                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 336                                gmx_cfg.u64 & ~1ull);
 337
 338                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
 339                                control.u64);
 340                 if (dev->flags & IFF_PROMISC)
 341                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 342                                        (index, interface), 0);
 343                 else
 344                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 345                                        (index, interface), 1);
 346
 347                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 348                                gmx_cfg.u64);
 349         }
 350 }
 351
 352 static int cvm_oct_set_mac_filter(struct net_device *dev)
 353 {
 354         struct octeon_ethernet *priv = netdev_priv(dev);
 355         union cvmx_gmxx_prtx_cfg gmx_cfg;
 356         int interface = INTERFACE(priv->port);
 357
 358         if ((interface < 2) &&
 359             (cvmx_helper_interface_get_mode(interface) !=
 360                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 361                 int i;
 362                 u8 *ptr = dev->dev_addr;
 363                 u64 mac = 0;
 364                 int index = INDEX(priv->port);
 365
 366                 for (i = 0; i < 6; i++)
 367                         mac = (mac << 8) | (u64)ptr[i];
 368
 369                 gmx_cfg.u64 =
 370                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 371                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 372                                gmx_cfg.u64 & ~1ull);
 373
 374                 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
 375                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
 376                                ptr[0]);
 377                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
 378                                ptr[1]);
 379                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
 380                                ptr[2]);
 381                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
 382                                ptr[3]);
 383                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
 384                                ptr[4]);
 385                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
 386                                ptr[5]);
 387                 cvm_oct_common_set_multicast_list(dev);
 388                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 389                                gmx_cfg.u64);
 390         }
 391         return 0;
 392 }
 393
 394 /**
 395  * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
 396  * @dev:    The device in question.
 397  * @addr:   Socket address.
 398  *
 399  * Returns Zero on success
 400  */
 401 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
 402 {
 403         int r = eth_mac_addr(dev, addr);
 404
 405         if (r)
 406                 return r;
 407         return cvm_oct_set_mac_filter(dev);
 408 }
 409
 410 /**
 411  * cvm_oct_common_init - per network device initialization
 412  * @dev:    Device to initialize
 413  *
 414  * Returns Zero on success
 415  */
 416 int cvm_oct_common_init(struct net_device *dev)
 417 {
 418         struct octeon_ethernet *priv = netdev_priv(dev);
 419         const u8 *mac = NULL;
 420
 421         if (priv->of_node)
 422                 mac = of_get_mac_address(priv->of_node);
 423
 424         if (mac)
 425                 ether_addr_copy(dev->dev_addr, mac);
 426         else
 427                 eth_hw_addr_random(dev);
 428
 429         /*
 430          * Force the interface to use the POW send if always_use_pow
 431          * was specified or it is in the pow send list.
 432          */
 433         if ((pow_send_group != -1) &&
 434             (always_use_pow || strstr(pow_send_list, dev->name)))
 435                 priv->queue = -1;
 436
 437         if (priv->queue != -1)
 438                 dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
 439
 440         /* We do our own locking, Linux doesn't need to */
 441         dev->features |= NETIF_F_LLTX;
 442         dev->ethtool_ops = &cvm_oct_ethtool_ops;
 443
 444         cvm_oct_set_mac_filter(dev);
 445         dev->netdev_ops->ndo_change_mtu(dev, dev->mtu);
 446
 447         /*
 448          * Zero out stats for port so we won't mistakenly show
 449          * counters from the bootloader.
 450          */
 451         memset(dev->netdev_ops->ndo_get_stats(dev), 0,
 452                sizeof(struct net_device_stats));
 453
 454         if (dev->netdev_ops->ndo_stop)
 455                 dev->netdev_ops->ndo_stop(dev);
 456
 457         return 0;
 458 }
 459
 460 void cvm_oct_common_uninit(struct net_device *dev)
 461 {
 462         if (dev->phydev)
 463                 phy_disconnect(dev->phydev);
 464 }
 465
 466 int cvm_oct_common_open(struct net_device *dev,
 467                         void (*link_poll)(struct net_device *))
 468 {
 469         union cvmx_gmxx_prtx_cfg gmx_cfg;
 470         struct octeon_ethernet *priv = netdev_priv(dev);
 471         int interface = INTERFACE(priv->port);
 472         int index = INDEX(priv->port);
 473         cvmx_helper_link_info_t link_info;
 474         int rv;
 475
 476         rv = cvm_oct_phy_setup_device(dev);
 477         if (rv)
 478                 return rv;
 479
 480         gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 481         gmx_cfg.s.en = 1;
 482         cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
 483
 484         if (octeon_is_simulation())
 485                 return 0;
 486
 487         if (dev->phydev) {
 488                 int r = phy_read_status(dev->phydev);
 489
 490                 if (r == 0 && dev->phydev->link == 0)
 491                         netif_carrier_off(dev);
 492                 cvm_oct_adjust_link(dev);
 493         } else {
 494                 link_info = cvmx_helper_link_get(priv->port);
 495                 if (!link_info.s.link_up)
 496                         netif_carrier_off(dev);
 497                 priv->poll = link_poll;
 498                 link_poll(dev);
 499         }
 500
 501         return 0;
 502 }
 503
 504 void cvm_oct_link_poll(struct net_device *dev)
 505 {
 506         struct octeon_ethernet *priv = netdev_priv(dev);
 507         cvmx_helper_link_info_t link_info;
 508
 509         link_info = cvmx_helper_link_get(priv->port);
 510         if (link_info.u64 == priv->link_info)
 511                 return;
 512
 513         link_info = cvmx_helper_link_autoconf(priv->port);
 514         priv->link_info = link_info.u64;
 515
 516         if (link_info.s.link_up) {
 517                 if (!netif_carrier_ok(dev))
 518                         netif_carrier_on(dev);
 519         } else if (netif_carrier_ok(dev)) {
 520                 netif_carrier_off(dev);
 521         }
 522         cvm_oct_note_carrier(priv, link_info);
 523 }
 524
 525 static int cvm_oct_xaui_open(struct net_device *dev)
 526 {
 527         return cvm_oct_common_open(dev, cvm_oct_link_poll);
 528 }
 529
 530 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
 531         .ndo_init               = cvm_oct_common_init,
 532         .ndo_uninit             = cvm_oct_common_uninit,
 533         .ndo_start_xmit         = cvm_oct_xmit,
 534         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 535         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 536         .ndo_do_ioctl           = cvm_oct_ioctl,
 537         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 538         .ndo_get_stats          = cvm_oct_common_get_stats,
 539 #ifdef CONFIG_NET_POLL_CONTROLLER
 540         .ndo_poll_controller    = cvm_oct_poll_controller,
 541 #endif
 542 };
 543
 544 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
 545         .ndo_init               = cvm_oct_common_init,
 546         .ndo_uninit             = cvm_oct_common_uninit,
 547         .ndo_open               = cvm_oct_xaui_open,
 548         .ndo_stop               = cvm_oct_common_stop,
 549         .ndo_start_xmit         = cvm_oct_xmit,
 550         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 551         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 552         .ndo_do_ioctl           = cvm_oct_ioctl,
 553         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 554         .ndo_get_stats          = cvm_oct_common_get_stats,
 555 #ifdef CONFIG_NET_POLL_CONTROLLER
 556         .ndo_poll_controller    = cvm_oct_poll_controller,
 557 #endif
 558 };
 559
 560 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
 561         .ndo_init               = cvm_oct_sgmii_init,
 562         .ndo_uninit             = cvm_oct_common_uninit,
 563         .ndo_open               = cvm_oct_sgmii_open,
 564         .ndo_stop               = cvm_oct_common_stop,
 565         .ndo_start_xmit         = cvm_oct_xmit,
 566         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 567         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 568         .ndo_do_ioctl           = cvm_oct_ioctl,
 569         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 570         .ndo_get_stats          = cvm_oct_common_get_stats,
 571 #ifdef CONFIG_NET_POLL_CONTROLLER
 572         .ndo_poll_controller    = cvm_oct_poll_controller,
 573 #endif
 574 };
 575
 576 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
 577         .ndo_init               = cvm_oct_spi_init,
 578         .ndo_uninit             = cvm_oct_spi_uninit,
 579         .ndo_start_xmit         = cvm_oct_xmit,
 580         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 581         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 582         .ndo_do_ioctl           = cvm_oct_ioctl,
 583         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 584         .ndo_get_stats          = cvm_oct_common_get_stats,
 585 #ifdef CONFIG_NET_POLL_CONTROLLER
 586         .ndo_poll_controller    = cvm_oct_poll_controller,
 587 #endif
 588 };
 589
 590 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
 591         .ndo_init               = cvm_oct_common_init,
 592         .ndo_uninit             = cvm_oct_common_uninit,
 593         .ndo_open               = cvm_oct_rgmii_open,
 594         .ndo_stop               = cvm_oct_common_stop,
 595         .ndo_start_xmit         = cvm_oct_xmit,
 596         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 597         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 598         .ndo_do_ioctl           = cvm_oct_ioctl,
 599         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 600         .ndo_get_stats          = cvm_oct_common_get_stats,
 601 #ifdef CONFIG_NET_POLL_CONTROLLER
 602         .ndo_poll_controller    = cvm_oct_poll_controller,
 603 #endif
 604 };
 605
 606 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
 607         .ndo_init               = cvm_oct_common_init,
 608         .ndo_start_xmit         = cvm_oct_xmit_pow,
 609         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 610         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 611         .ndo_do_ioctl           = cvm_oct_ioctl,
 612         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 613         .ndo_get_stats          = cvm_oct_common_get_stats,
 614 #ifdef CONFIG_NET_POLL_CONTROLLER
 615         .ndo_poll_controller    = cvm_oct_poll_controller,
 616 #endif
 617 };
 618
 619 static struct device_node *cvm_oct_of_get_child(
 620                                 const struct device_node *parent, int reg_val)
 621 {
 622         struct device_node *node = NULL;
 623         int size;
 624         const __be32 *addr;
 625
 626         for (;;) {
 627                 node = of_get_next_child(parent, node);
 628                 if (!node)
 629                         break;
 630                 addr = of_get_property(node, "reg", &size);
 631                 if (addr && (be32_to_cpu(*addr) == reg_val))
 632                         break;
 633         }
 634         return node;
 635 }
 636
 637 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
 638                                                  int interface, int port)
 639 {
 640         struct device_node *ni, *np;
 641
 642         ni = cvm_oct_of_get_child(pip, interface);
 643         if (!ni)
 644                 return NULL;
 645
 646         np = cvm_oct_of_get_child(ni, port);
 647         of_node_put(ni);
 648
 649         return np;
 650 }
 651
 652 static void cvm_set_rgmii_delay(struct device_node *np, int iface, int port)
 653 {
 654         u32 delay_value;
 655
 656         if (!of_property_read_u32(np, "rx-delay", &delay_value))
 657                 cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, iface), delay_value);
 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 }
 661
 662 static int cvm_oct_probe(struct platform_device *pdev)
 663 {
 664         int num_interfaces;
 665         int interface;
 666         int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
 667         int qos;
 668         struct device_node *pip;
 669
 670         octeon_mdiobus_force_mod_depencency();
 671
 672         pip = pdev->dev.of_node;
 673         if (!pip) {
 674                 pr_err("Error: No 'pip' in /aliases\n");
 675                 return -EINVAL;
 676         }
 677
 678
 679         cvm_oct_configure_common_hw();
 680
 681         cvmx_helper_initialize_packet_io_global();
 682
 683         pow_receive_groups = BIT(pow_receive_group);
 684
 685         /* Change the input group for all ports before input is enabled */
 686         num_interfaces = cvmx_helper_get_number_of_interfaces();
 687         for (interface = 0; interface < num_interfaces; interface++) {
 688                 int num_ports = cvmx_helper_ports_on_interface(interface);
 689                 int port;
 690
 691                 for (port = cvmx_helper_get_ipd_port(interface, 0);
 692                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 693                      port++) {
 694                         union cvmx_pip_prt_tagx pip_prt_tagx;
 695
 696                         pip_prt_tagx.u64 =
 697                             cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
 698                         pip_prt_tagx.s.grp = pow_receive_group;
 699                         cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
 700                                        pip_prt_tagx.u64);
 701                 }
 702         }
 703
 704         cvmx_helper_ipd_and_packet_input_enable();
 705
 706         memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
 707
 708         /*
 709          * Initialize the FAU used for counting packet buffers that
 710          * need to be freed.
 711          */
 712         cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
 713
 714         /* Initialize the FAU used for counting tx SKBs that need to be freed */
 715         cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
 716
 717         if ((pow_send_group != -1)) {
 718                 struct net_device *dev;
 719
 720                 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
 721                 if (dev) {
 722                         /* Initialize the device private structure. */
 723                         struct octeon_ethernet *priv = netdev_priv(dev);
 724
 725                         dev->netdev_ops = &cvm_oct_pow_netdev_ops;
 726                         priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
 727                         priv->port = CVMX_PIP_NUM_INPUT_PORTS;
 728                         priv->queue = -1;
 729                         strcpy(dev->name, "pow%d");
 730                         for (qos = 0; qos < 16; qos++)
 731                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 732
 733                         if (register_netdev(dev) < 0) {
 734                                 pr_err("Failed to register ethernet device for POW\n");
 735                                 free_netdev(dev);
 736                         } else {
 737                                 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
 738                                 pr_info("%s: POW send group %d, receive group %d\n",
 739                                         dev->name, pow_send_group,
 740                                         pow_receive_group);
 741                         }
 742                 } else {
 743                         pr_err("Failed to allocate ethernet device for POW\n");
 744                 }
 745         }
 746
 747         num_interfaces = cvmx_helper_get_number_of_interfaces();
 748         for (interface = 0; interface < num_interfaces; interface++) {
 749                 cvmx_helper_interface_mode_t imode =
 750                     cvmx_helper_interface_get_mode(interface);
 751                 int num_ports = cvmx_helper_ports_on_interface(interface);
 752                 int port;
 753                 int port_index;
 754
 755                 for (port_index = 0,
 756                      port = cvmx_helper_get_ipd_port(interface, 0);
 757                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 758                      port_index++, port++) {
 759                         struct octeon_ethernet *priv;
 760                         struct net_device *dev =
 761                             alloc_etherdev(sizeof(struct octeon_ethernet));
 762                         if (!dev) {
 763                                 pr_err("Failed to allocate ethernet device for port %d\n",
 764                                        port);
 765                                 continue;
 766                         }
 767
 768                         /* Initialize the device private structure. */
 769                         priv = netdev_priv(dev);
 770                         priv->netdev = dev;
 771                         priv->of_node = cvm_oct_node_for_port(pip, interface,
 772                                                                 port_index);
 773
 774                         INIT_DELAYED_WORK(&priv->port_periodic_work,
 775                                           cvm_oct_periodic_worker);
 776                         priv->imode = imode;
 777                         priv->port = port;
 778                         priv->queue = cvmx_pko_get_base_queue(priv->port);
 779                         priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
 780                         for (qos = 0; qos < 16; qos++)
 781                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 782                         for (qos = 0; qos < cvmx_pko_get_num_queues(port);
 783                              qos++)
 784                                 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
 785
 786                         switch (priv->imode) {
 787                         /* These types don't support ports to IPD/PKO */
 788                         case CVMX_HELPER_INTERFACE_MODE_DISABLED:
 789                         case CVMX_HELPER_INTERFACE_MODE_PCIE:
 790                         case CVMX_HELPER_INTERFACE_MODE_PICMG:
 791                                 break;
 792
 793                         case CVMX_HELPER_INTERFACE_MODE_NPI:
 794                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 795                                 strcpy(dev->name, "npi%d");
 796                                 break;
 797
 798                         case CVMX_HELPER_INTERFACE_MODE_XAUI:
 799                                 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
 800                                 strcpy(dev->name, "xaui%d");
 801                                 break;
 802
 803                         case CVMX_HELPER_INTERFACE_MODE_LOOP:
 804                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 805                                 strcpy(dev->name, "loop%d");
 806                                 break;
 807
 808                         case CVMX_HELPER_INTERFACE_MODE_SGMII:
 809                                 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
 810                                 strcpy(dev->name, "eth%d");
 811                                 break;
 812
 813                         case CVMX_HELPER_INTERFACE_MODE_SPI:
 814                                 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
 815                                 strcpy(dev->name, "spi%d");
 816                                 break;
 817
 818                         case CVMX_HELPER_INTERFACE_MODE_RGMII:
 819                         case CVMX_HELPER_INTERFACE_MODE_GMII:
 820                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 821                                 strcpy(dev->name, "eth%d");
 822                                 cvm_set_rgmii_delay(priv->of_node, interface,
 823                                                     port_index);
 824                                 break;
 825                         }
 826
 827                         if (!dev->netdev_ops) {
 828                                 free_netdev(dev);
 829                         } else if (register_netdev(dev) < 0) {
 830                                 pr_err("Failed to register ethernet device for interface %d, port %d\n",
 831                                        interface, priv->port);
 832                                 free_netdev(dev);
 833                         } else {
 834                                 cvm_oct_device[priv->port] = dev;
 835                                 fau -=
 836                                     cvmx_pko_get_num_queues(priv->port) *
 837                                     sizeof(u32);
 838                                 schedule_delayed_work(&priv->port_periodic_work, HZ);
 839                         }
 840                 }
 841         }
 842
 843         cvm_oct_tx_initialize();
 844         cvm_oct_rx_initialize();
 845
 846         /*
 847          * 150 uS: about 10 1500-byte packets at 1GE.
 848          */
 849         cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
 850
 851         schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 852
 853         return 0;
 854 }
 855
 856 static int cvm_oct_remove(struct platform_device *pdev)
 857 {
 858         int port;
 859
 860         cvmx_ipd_disable();
 861
 862         atomic_inc_return(&cvm_oct_poll_queue_stopping);
 863         cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
 864
 865         cvm_oct_rx_shutdown();
 866         cvm_oct_tx_shutdown();
 867
 868         cvmx_pko_disable();
 869
 870         /* Free the ethernet devices */
 871         for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
 872                 if (cvm_oct_device[port]) {
 873                         struct net_device *dev = cvm_oct_device[port];
 874                         struct octeon_ethernet *priv = netdev_priv(dev);
 875
 876                         cancel_delayed_work_sync(&priv->port_periodic_work);
 877
 878                         cvm_oct_tx_shutdown_dev(dev);
 879                         unregister_netdev(dev);
 880                         free_netdev(dev);
 881                         cvm_oct_device[port] = NULL;
 882                 }
 883         }
 884
 885
 886         cvmx_pko_shutdown();
 887
 888         cvmx_ipd_free_ptr();
 889
 890         /* Free the HW pools */
 891         cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 892                               num_packet_buffers);
 893         cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 894                               num_packet_buffers);
 895         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 896                 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 897                                       CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
 898         return 0;
 899 }
 900
 901 static const struct of_device_id cvm_oct_match[] = {
 902         {
 903                 .compatible = "cavium,octeon-3860-pip",
 904         },
 905         {},
 906 };
 907 MODULE_DEVICE_TABLE(of, cvm_oct_match);
 908
 909 static struct platform_driver cvm_oct_driver = {
 910         .probe          = cvm_oct_probe,
 911         .remove         = cvm_oct_remove,
 912         .driver         = {
 913                 .name   = KBUILD_MODNAME,
 914                 .of_match_table = cvm_oct_match,
 915         },
 916 };
 917
 918 module_platform_driver(cvm_oct_driver);
 919
 920 MODULE_LICENSE("GPL");
 921 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
 922 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");