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         int index = INDEX(priv->port);
 241 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
 242         int vlan_bytes = 4;
 243 #else
 244         int vlan_bytes = 0;
 245 #endif
 246
 247         /*
 248          * Limit the MTU to make sure the ethernet packets are between
 249          * 64 bytes and 65535 bytes.
 250          */
 251         if ((new_mtu + 14 + 4 + vlan_bytes < 64) ||
 252             (new_mtu + 14 + 4 + vlan_bytes > 65392)) {
 253                 pr_err("MTU must be between %d and %d.\n",
 254                        64 - 14 - 4 - vlan_bytes, 65392 - 14 - 4 - vlan_bytes);
 255                 return -EINVAL;
 256         }
 257         dev->mtu = new_mtu;
 258
 259         if ((interface < 2) &&
 260             (cvmx_helper_interface_get_mode(interface) !=
 261                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 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         int index = INDEX(priv->port);
 304
 305         if ((interface < 2) &&
 306             (cvmx_helper_interface_get_mode(interface) !=
 307                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 308                 union cvmx_gmxx_rxx_adr_ctl control;
 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         int index = INDEX(priv->port);
 356
 357         if ((interface < 2) &&
 358             (cvmx_helper_interface_get_mode(interface) !=
 359                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 360                 int i;
 361                 u8 *ptr = dev->dev_addr;
 362                 u64 mac = 0;
 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         struct octeon_ethernet *priv = netdev_priv(dev);
 461
 462         if (priv->phydev)
 463                 phy_disconnect(priv->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 (priv->phydev) {
 488                 int r = phy_read_status(priv->phydev);
 489
 490                 if (r == 0 && priv->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 int cvm_oct_probe(struct platform_device *pdev)
 653 {
 654         int num_interfaces;
 655         int interface;
 656         int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
 657         int qos;
 658         struct device_node *pip;
 659
 660         octeon_mdiobus_force_mod_depencency();
 661
 662         pip = pdev->dev.of_node;
 663         if (!pip) {
 664                 pr_err("Error: No 'pip' in /aliases\n");
 665                 return -EINVAL;
 666         }
 667
 668
 669         cvm_oct_configure_common_hw();
 670
 671         cvmx_helper_initialize_packet_io_global();
 672
 673         /* Change the input group for all ports before input is enabled */
 674         num_interfaces = cvmx_helper_get_number_of_interfaces();
 675         for (interface = 0; interface < num_interfaces; interface++) {
 676                 int num_ports = cvmx_helper_ports_on_interface(interface);
 677                 int port;
 678
 679                 for (port = cvmx_helper_get_ipd_port(interface, 0);
 680                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 681                      port++) {
 682                         union cvmx_pip_prt_tagx pip_prt_tagx;
 683
 684                         pip_prt_tagx.u64 =
 685                             cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
 686                         pip_prt_tagx.s.grp = pow_receive_group;
 687                         cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
 688                                        pip_prt_tagx.u64);
 689                 }
 690         }
 691
 692         cvmx_helper_ipd_and_packet_input_enable();
 693
 694         memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
 695
 696         /*
 697          * Initialize the FAU used for counting packet buffers that
 698          * need to be freed.
 699          */
 700         cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
 701
 702         /* Initialize the FAU used for counting tx SKBs that need to be freed */
 703         cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
 704
 705         if ((pow_send_group != -1)) {
 706                 struct net_device *dev;
 707
 708                 pr_info("\tConfiguring device for POW only access\n");
 709                 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
 710                 if (dev) {
 711                         /* Initialize the device private structure. */
 712                         struct octeon_ethernet *priv = netdev_priv(dev);
 713
 714                         dev->netdev_ops = &cvm_oct_pow_netdev_ops;
 715                         priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
 716                         priv->port = CVMX_PIP_NUM_INPUT_PORTS;
 717                         priv->queue = -1;
 718                         strcpy(dev->name, "pow%d");
 719                         for (qos = 0; qos < 16; qos++)
 720                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 721
 722                         if (register_netdev(dev) < 0) {
 723                                 pr_err("Failed to register ethernet device for POW\n");
 724                                 free_netdev(dev);
 725                         } else {
 726                                 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
 727                                 pr_info("%s: POW send group %d, receive group %d\n",
 728                                         dev->name, pow_send_group,
 729                                         pow_receive_group);
 730                         }
 731                 } else {
 732                         pr_err("Failed to allocate ethernet device for POW\n");
 733                 }
 734         }
 735
 736         num_interfaces = cvmx_helper_get_number_of_interfaces();
 737         for (interface = 0; interface < num_interfaces; interface++) {
 738                 cvmx_helper_interface_mode_t imode =
 739                     cvmx_helper_interface_get_mode(interface);
 740                 int num_ports = cvmx_helper_ports_on_interface(interface);
 741                 int port;
 742                 int port_index;
 743
 744                 for (port_index = 0,
 745                      port = cvmx_helper_get_ipd_port(interface, 0);
 746                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 747                      port_index++, port++) {
 748                         struct octeon_ethernet *priv;
 749                         struct net_device *dev =
 750                             alloc_etherdev(sizeof(struct octeon_ethernet));
 751                         if (!dev) {
 752                                 pr_err("Failed to allocate ethernet device for port %d\n",
 753                                        port);
 754                                 continue;
 755                         }
 756
 757                         /* Initialize the device private structure. */
 758                         priv = netdev_priv(dev);
 759                         priv->netdev = dev;
 760                         priv->of_node = cvm_oct_node_for_port(pip, interface,
 761                                                                 port_index);
 762
 763                         INIT_DELAYED_WORK(&priv->port_periodic_work,
 764                                           cvm_oct_periodic_worker);
 765                         priv->imode = imode;
 766                         priv->port = port;
 767                         priv->queue = cvmx_pko_get_base_queue(priv->port);
 768                         priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
 769                         for (qos = 0; qos < 16; qos++)
 770                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 771                         for (qos = 0; qos < cvmx_pko_get_num_queues(port);
 772                              qos++)
 773                                 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
 774
 775                         switch (priv->imode) {
 776                         /* These types don't support ports to IPD/PKO */
 777                         case CVMX_HELPER_INTERFACE_MODE_DISABLED:
 778                         case CVMX_HELPER_INTERFACE_MODE_PCIE:
 779                         case CVMX_HELPER_INTERFACE_MODE_PICMG:
 780                                 break;
 781
 782                         case CVMX_HELPER_INTERFACE_MODE_NPI:
 783                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 784                                 strcpy(dev->name, "npi%d");
 785                                 break;
 786
 787                         case CVMX_HELPER_INTERFACE_MODE_XAUI:
 788                                 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
 789                                 strcpy(dev->name, "xaui%d");
 790                                 break;
 791
 792                         case CVMX_HELPER_INTERFACE_MODE_LOOP:
 793                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 794                                 strcpy(dev->name, "loop%d");
 795                                 break;
 796
 797                         case CVMX_HELPER_INTERFACE_MODE_SGMII:
 798                                 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
 799                                 strcpy(dev->name, "eth%d");
 800                                 break;
 801
 802                         case CVMX_HELPER_INTERFACE_MODE_SPI:
 803                                 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
 804                                 strcpy(dev->name, "spi%d");
 805                                 break;
 806
 807                         case CVMX_HELPER_INTERFACE_MODE_RGMII:
 808                         case CVMX_HELPER_INTERFACE_MODE_GMII:
 809                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 810                                 strcpy(dev->name, "eth%d");
 811                                 break;
 812                         }
 813
 814                         if (!dev->netdev_ops) {
 815                                 free_netdev(dev);
 816                         } else if (register_netdev(dev) < 0) {
 817                                 pr_err("Failed to register ethernet device for interface %d, port %d\n",
 818                                          interface, priv->port);
 819                                 free_netdev(dev);
 820                         } else {
 821                                 cvm_oct_device[priv->port] = dev;
 822                                 fau -=
 823                                     cvmx_pko_get_num_queues(priv->port) *
 824                                     sizeof(u32);
 825                                 schedule_delayed_work(&priv->port_periodic_work, HZ);
 826                         }
 827                 }
 828         }
 829
 830         cvm_oct_tx_initialize();
 831         cvm_oct_rx_initialize();
 832
 833         /*
 834          * 150 uS: about 10 1500-byte packets at 1GE.
 835          */
 836         cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
 837
 838         schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 839
 840         return 0;
 841 }
 842
 843 static int cvm_oct_remove(struct platform_device *pdev)
 844 {
 845         int port;
 846
 847         /* Disable POW interrupt */
 848         if (OCTEON_IS_MODEL(OCTEON_CN68XX))
 849                 cvmx_write_csr(CVMX_SSO_WQ_INT_THRX(pow_receive_group), 0);
 850         else
 851                 cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), 0);
 852
 853         cvmx_ipd_disable();
 854
 855         /* Free the interrupt handler */
 856         free_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, cvm_oct_device);
 857
 858         atomic_inc_return(&cvm_oct_poll_queue_stopping);
 859         cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
 860
 861         cvm_oct_rx_shutdown();
 862         cvm_oct_tx_shutdown();
 863
 864         cvmx_pko_disable();
 865
 866         /* Free the ethernet devices */
 867         for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
 868                 if (cvm_oct_device[port]) {
 869                         struct net_device *dev = cvm_oct_device[port];
 870                         struct octeon_ethernet *priv = netdev_priv(dev);
 871
 872                         cancel_delayed_work_sync(&priv->port_periodic_work);
 873
 874                         cvm_oct_tx_shutdown_dev(dev);
 875                         unregister_netdev(dev);
 876                         free_netdev(dev);
 877                         cvm_oct_device[port] = NULL;
 878                 }
 879         }
 880
 881
 882         cvmx_pko_shutdown();
 883
 884         cvmx_ipd_free_ptr();
 885
 886         /* Free the HW pools */
 887         cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 888                               num_packet_buffers);
 889         cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 890                               num_packet_buffers);
 891         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 892                 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 893                                       CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
 894         return 0;
 895 }
 896
 897 static const struct of_device_id cvm_oct_match[] = {
 898         {
 899                 .compatible = "cavium,octeon-3860-pip",
 900         },
 901         {},
 902 };
 903 MODULE_DEVICE_TABLE(of, cvm_oct_match);
 904
 905 static struct platform_driver cvm_oct_driver = {
 906         .probe          = cvm_oct_probe,
 907         .remove         = cvm_oct_remove,
 908         .driver         = {
 909                 .name   = KBUILD_MODNAME,
 910                 .of_match_table = cvm_oct_match,
 911         },
 912 };
 913
 914 module_platform_driver(cvm_oct_driver);
 915
 916 MODULE_LICENSE("GPL");
 917 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
 918 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");