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         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                 pr_info("\tConfiguring device for POW only access\n");
 707                 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
 708                 if (dev) {
 709                         /* Initialize the device private structure. */
 710                         struct octeon_ethernet *priv = netdev_priv(dev);
 711
 712                         dev->netdev_ops = &cvm_oct_pow_netdev_ops;
 713                         priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
 714                         priv->port = CVMX_PIP_NUM_INPUT_PORTS;
 715                         priv->queue = -1;
 716                         strcpy(dev->name, "pow%d");
 717                         for (qos = 0; qos < 16; qos++)
 718                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 719
 720                         if (register_netdev(dev) < 0) {
 721                                 pr_err("Failed to register ethernet device for POW\n");
 722                                 free_netdev(dev);
 723                         } else {
 724                                 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
 725                                 pr_info("%s: POW send group %d, receive group %d\n",
 726                                         dev->name, pow_send_group,
 727                                         pow_receive_group);
 728                         }
 729                 } else {
 730                         pr_err("Failed to allocate ethernet device for POW\n");
 731                 }
 732         }
 733
 734         num_interfaces = cvmx_helper_get_number_of_interfaces();
 735         for (interface = 0; interface < num_interfaces; interface++) {
 736                 cvmx_helper_interface_mode_t imode =
 737                     cvmx_helper_interface_get_mode(interface);
 738                 int num_ports = cvmx_helper_ports_on_interface(interface);
 739                 int port;
 740                 int port_index;
 741
 742                 for (port_index = 0,
 743                      port = cvmx_helper_get_ipd_port(interface, 0);
 744                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 745                      port_index++, port++) {
 746                         struct octeon_ethernet *priv;
 747                         struct net_device *dev =
 748                             alloc_etherdev(sizeof(struct octeon_ethernet));
 749                         if (!dev) {
 750                                 pr_err("Failed to allocate ethernet device for port %d\n",
 751                                        port);
 752                                 continue;
 753                         }
 754
 755                         /* Initialize the device private structure. */
 756                         priv = netdev_priv(dev);
 757                         priv->netdev = dev;
 758                         priv->of_node = cvm_oct_node_for_port(pip, interface,
 759                                                                 port_index);
 760
 761                         INIT_DELAYED_WORK(&priv->port_periodic_work,
 762                                           cvm_oct_periodic_worker);
 763                         priv->imode = imode;
 764                         priv->port = port;
 765                         priv->queue = cvmx_pko_get_base_queue(priv->port);
 766                         priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
 767                         for (qos = 0; qos < 16; qos++)
 768                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 769                         for (qos = 0; qos < cvmx_pko_get_num_queues(port);
 770                              qos++)
 771                                 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
 772
 773                         switch (priv->imode) {
 774                         /* These types don't support ports to IPD/PKO */
 775                         case CVMX_HELPER_INTERFACE_MODE_DISABLED:
 776                         case CVMX_HELPER_INTERFACE_MODE_PCIE:
 777                         case CVMX_HELPER_INTERFACE_MODE_PICMG:
 778                                 break;
 779
 780                         case CVMX_HELPER_INTERFACE_MODE_NPI:
 781                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 782                                 strcpy(dev->name, "npi%d");
 783                                 break;
 784
 785                         case CVMX_HELPER_INTERFACE_MODE_XAUI:
 786                                 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
 787                                 strcpy(dev->name, "xaui%d");
 788                                 break;
 789
 790                         case CVMX_HELPER_INTERFACE_MODE_LOOP:
 791                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 792                                 strcpy(dev->name, "loop%d");
 793                                 break;
 794
 795                         case CVMX_HELPER_INTERFACE_MODE_SGMII:
 796                                 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
 797                                 strcpy(dev->name, "eth%d");
 798                                 break;
 799
 800                         case CVMX_HELPER_INTERFACE_MODE_SPI:
 801                                 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
 802                                 strcpy(dev->name, "spi%d");
 803                                 break;
 804
 805                         case CVMX_HELPER_INTERFACE_MODE_RGMII:
 806                         case CVMX_HELPER_INTERFACE_MODE_GMII:
 807                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 808                                 strcpy(dev->name, "eth%d");
 809                                 break;
 810                         }
 811
 812                         if (!dev->netdev_ops) {
 813                                 free_netdev(dev);
 814                         } else if (register_netdev(dev) < 0) {
 815                                 pr_err("Failed to register ethernet device for interface %d, port %d\n",
 816                                        interface, priv->port);
 817                                 free_netdev(dev);
 818                         } else {
 819                                 cvm_oct_device[priv->port] = dev;
 820                                 fau -=
 821                                     cvmx_pko_get_num_queues(priv->port) *
 822                                     sizeof(u32);
 823                                 schedule_delayed_work(&priv->port_periodic_work, HZ);
 824                         }
 825                 }
 826         }
 827
 828         cvm_oct_tx_initialize();
 829         cvm_oct_rx_initialize();
 830
 831         /*
 832          * 150 uS: about 10 1500-byte packets at 1GE.
 833          */
 834         cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
 835
 836         schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 837
 838         return 0;
 839 }
 840
 841 static int cvm_oct_remove(struct platform_device *pdev)
 842 {
 843         int port;
 844
 845         /* Disable POW interrupt */
 846         if (OCTEON_IS_MODEL(OCTEON_CN68XX))
 847                 cvmx_write_csr(CVMX_SSO_WQ_INT_THRX(pow_receive_group), 0);
 848         else
 849                 cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), 0);
 850
 851         cvmx_ipd_disable();
 852
 853         /* Free the interrupt handler */
 854         free_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, cvm_oct_device);
 855
 856         atomic_inc_return(&cvm_oct_poll_queue_stopping);
 857         cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
 858
 859         cvm_oct_rx_shutdown();
 860         cvm_oct_tx_shutdown();
 861
 862         cvmx_pko_disable();
 863
 864         /* Free the ethernet devices */
 865         for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
 866                 if (cvm_oct_device[port]) {
 867                         struct net_device *dev = cvm_oct_device[port];
 868                         struct octeon_ethernet *priv = netdev_priv(dev);
 869
 870                         cancel_delayed_work_sync(&priv->port_periodic_work);
 871
 872                         cvm_oct_tx_shutdown_dev(dev);
 873                         unregister_netdev(dev);
 874                         free_netdev(dev);
 875                         cvm_oct_device[port] = NULL;
 876                 }
 877         }
 878
 879
 880         cvmx_pko_shutdown();
 881
 882         cvmx_ipd_free_ptr();
 883
 884         /* Free the HW pools */
 885         cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 886                               num_packet_buffers);
 887         cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 888                               num_packet_buffers);
 889         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 890                 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 891                                       CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
 892         return 0;
 893 }
 894
 895 static const struct of_device_id cvm_oct_match[] = {
 896         {
 897                 .compatible = "cavium,octeon-3860-pip",
 898         },
 899         {},
 900 };
 901 MODULE_DEVICE_TABLE(of, cvm_oct_match);
 902
 903 static struct platform_driver cvm_oct_driver = {
 904         .probe          = cvm_oct_probe,
 905         .remove         = cvm_oct_remove,
 906         .driver         = {
 907                 .name   = KBUILD_MODNAME,
 908                 .of_match_table = cvm_oct_match,
 909         },
 910 };
 911
 912 module_platform_driver(cvm_oct_driver);
 913
 914 MODULE_LICENSE("GPL");
 915 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
 916 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");