drivers/staging/octeon/ethernet.c

   1 /**********************************************************************
   2  * Author: Cavium Networks
   3  *
   4  * Contact: support@caviumnetworks.com
   5  * This file is part of the OCTEON SDK
   6  *
   7  * Copyright (c) 2003-2007 Cavium Networks
   8  *
   9  * This file is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License, Version 2, as
  11  * published by the Free Software Foundation.
  12  *
  13  * This file is distributed in the hope that it will be useful, but
  14  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
  15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
  16  * NONINFRINGEMENT.  See the GNU General Public License for more
  17  * details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this file; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  22  * or visit http://www.gnu.org/licenses/.
  23  *
  24  * This file may also be available under a different license from Cavium.
  25  * Contact Cavium Networks for more information
  26 **********************************************************************/
  27 #include <linux/platform_device.h>
  28 #include <linux/kernel.h>
  29 #include <linux/module.h>
  30 #include <linux/netdevice.h>
  31 #include <linux/etherdevice.h>
  32 #include <linux/phy.h>
  33 #include <linux/slab.h>
  34 #include <linux/interrupt.h>
  35 #include <linux/of_net.h>
  36
  37 #include <net/dst.h>
  38
  39 #include <asm/octeon/octeon.h>
  40
  41 #include "ethernet-defines.h"
  42 #include "octeon-ethernet.h"
  43 #include "ethernet-mem.h"
  44 #include "ethernet-rx.h"
  45 #include "ethernet-tx.h"
  46 #include "ethernet-mdio.h"
  47 #include "ethernet-util.h"
  48
  49 #include <asm/octeon/cvmx-pip.h>
  50 #include <asm/octeon/cvmx-pko.h>
  51 #include <asm/octeon/cvmx-fau.h>
  52 #include <asm/octeon/cvmx-ipd.h>
  53 #include <asm/octeon/cvmx-helper.h>
  54
  55 #include <asm/octeon/cvmx-gmxx-defs.h>
  56 #include <asm/octeon/cvmx-smix-defs.h>
  57
  58 static int num_packet_buffers = 1024;
  59 module_param(num_packet_buffers, int, 0444);
  60 MODULE_PARM_DESC(num_packet_buffers, "\n"
  61         "\tNumber of packet buffers to allocate and store in the\n"
  62         "\tFPA. By default, 1024 packet buffers are used.\n");
  63
  64 int pow_receive_group = 15;
  65 module_param(pow_receive_group, int, 0444);
  66 MODULE_PARM_DESC(pow_receive_group, "\n"
  67         "\tPOW group to receive packets from. All ethernet hardware\n"
  68         "\twill be configured to send incoming packets to this POW\n"
  69         "\tgroup. Also any other software can submit packets to this\n"
  70         "\tgroup for the kernel to process.");
  71
  72 int pow_send_group = -1;
  73 module_param(pow_send_group, int, 0644);
  74 MODULE_PARM_DESC(pow_send_group, "\n"
  75         "\tPOW group to send packets to other software on. This\n"
  76         "\tcontrols the creation of the virtual device pow0.\n"
  77         "\talways_use_pow also depends on this value.");
  78
  79 int always_use_pow;
  80 module_param(always_use_pow, int, 0444);
  81 MODULE_PARM_DESC(always_use_pow, "\n"
  82         "\tWhen set, always send to the pow group. This will cause\n"
  83         "\tpackets sent to real ethernet devices to be sent to the\n"
  84         "\tPOW group instead of the hardware. Unless some other\n"
  85         "\tapplication changes the config, packets will still be\n"
  86         "\treceived from the low level hardware. Use this option\n"
  87         "\tto allow a CVMX app to intercept all packets from the\n"
  88         "\tlinux kernel. You must specify pow_send_group along with\n"
  89         "\tthis option.");
  90
  91 char pow_send_list[128] = "";
  92 module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444);
  93 MODULE_PARM_DESC(pow_send_list, "\n"
  94         "\tComma separated list of ethernet devices that should use the\n"
  95         "\tPOW for transmit instead of the actual ethernet hardware. This\n"
  96         "\tis a per port version of always_use_pow. always_use_pow takes\n"
  97         "\tprecedence over this list. For example, setting this to\n"
  98         "\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n"
  99         "\tusing the pow_send_group.");
 100
 101 int rx_napi_weight = 32;
 102 module_param(rx_napi_weight, int, 0444);
 103 MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter.");
 104
 105 /**
 106  * cvm_oct_poll_queue - Workqueue for polling operations.
 107  */
 108 struct workqueue_struct *cvm_oct_poll_queue;
 109
 110 /**
 111  * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
 112  *
 113  * Set to one right before cvm_oct_poll_queue is destroyed.
 114  */
 115 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
 116
 117 /**
 118  * Array of every ethernet device owned by this driver indexed by
 119  * the ipd input port number.
 120  */
 121 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
 122
 123 u64 cvm_oct_tx_poll_interval;
 124
 125 static void cvm_oct_rx_refill_worker(struct work_struct *work);
 126 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
 127
 128 static void cvm_oct_rx_refill_worker(struct work_struct *work)
 129 {
 130         /*
 131          * FPA 0 may have been drained, try to refill it if we need
 132          * more than num_packet_buffers / 2, otherwise normal receive
 133          * processing will refill it.  If it were drained, no packets
 134          * could be received so cvm_oct_napi_poll would never be
 135          * invoked to do the refill.
 136          */
 137         cvm_oct_rx_refill_pool(num_packet_buffers / 2);
 138
 139         if (!atomic_read(&cvm_oct_poll_queue_stopping))
 140                 queue_delayed_work(cvm_oct_poll_queue,
 141                                    &cvm_oct_rx_refill_work, HZ);
 142 }
 143
 144 static void cvm_oct_periodic_worker(struct work_struct *work)
 145 {
 146         struct octeon_ethernet *priv = container_of(work,
 147                                                     struct octeon_ethernet,
 148                                                     port_periodic_work.work);
 149
 150         if (priv->poll)
 151                 priv->poll(cvm_oct_device[priv->port]);
 152
 153         cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats(
 154                                                 cvm_oct_device[priv->port]);
 155
 156         if (!atomic_read(&cvm_oct_poll_queue_stopping))
 157                 queue_delayed_work(cvm_oct_poll_queue,
 158                                                 &priv->port_periodic_work, HZ);
 159 }
 160
 161 static void cvm_oct_configure_common_hw(void)
 162 {
 163         /* Setup the FPA */
 164         cvmx_fpa_enable();
 165         cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 166                              num_packet_buffers);
 167         cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 168                              num_packet_buffers);
 169         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 170                 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 171                                      CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
 172
 173 #ifdef __LITTLE_ENDIAN
 174         {
 175                 union cvmx_ipd_ctl_status ipd_ctl_status;
 176                 ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 177                 ipd_ctl_status.s.pkt_lend = 1;
 178                 ipd_ctl_status.s.wqe_lend = 1;
 179                 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
 180         }
 181 #endif
 182
 183         if (USE_RED)
 184                 cvmx_helper_setup_red(num_packet_buffers / 4,
 185                                       num_packet_buffers / 8);
 186
 187 }
 188
 189 /**
 190  * cvm_oct_free_work- Free a work queue entry
 191  *
 192  * @work_queue_entry: Work queue entry to free
 193  *
 194  * Returns Zero on success, Negative on failure.
 195  */
 196 int cvm_oct_free_work(void *work_queue_entry)
 197 {
 198         cvmx_wqe_t *work = work_queue_entry;
 199
 200         int segments = work->word2.s.bufs;
 201         union cvmx_buf_ptr segment_ptr = work->packet_ptr;
 202
 203         while (segments--) {
 204                 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
 205                         cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
 206                 if (unlikely(!segment_ptr.s.i))
 207                         cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
 208                                       segment_ptr.s.pool,
 209                                       DONT_WRITEBACK(CVMX_FPA_PACKET_POOL_SIZE /
 210                                                      128));
 211                 segment_ptr = next_ptr;
 212         }
 213         cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, DONT_WRITEBACK(1));
 214
 215         return 0;
 216 }
 217 EXPORT_SYMBOL(cvm_oct_free_work);
 218
 219 /**
 220  * cvm_oct_common_get_stats - get the low level ethernet statistics
 221  * @dev:    Device to get the statistics from
 222  *
 223  * Returns Pointer to the statistics
 224  */
 225 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
 226 {
 227         cvmx_pip_port_status_t rx_status;
 228         cvmx_pko_port_status_t tx_status;
 229         struct octeon_ethernet *priv = netdev_priv(dev);
 230
 231         if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
 232                 if (octeon_is_simulation()) {
 233                         /* The simulator doesn't support statistics */
 234                         memset(&rx_status, 0, sizeof(rx_status));
 235                         memset(&tx_status, 0, sizeof(tx_status));
 236                 } else {
 237                         cvmx_pip_get_port_status(priv->port, 1, &rx_status);
 238                         cvmx_pko_get_port_status(priv->port, 1, &tx_status);
 239                 }
 240
 241                 priv->stats.rx_packets += rx_status.inb_packets;
 242                 priv->stats.tx_packets += tx_status.packets;
 243                 priv->stats.rx_bytes += rx_status.inb_octets;
 244                 priv->stats.tx_bytes += tx_status.octets;
 245                 priv->stats.multicast += rx_status.multicast_packets;
 246                 priv->stats.rx_crc_errors += rx_status.inb_errors;
 247                 priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
 248
 249                 /*
 250                  * The drop counter must be incremented atomically
 251                  * since the RX tasklet also increments it.
 252                  */
 253 #ifdef CONFIG_64BIT
 254                 atomic64_add(rx_status.dropped_packets,
 255                              (atomic64_t *)&priv->stats.rx_dropped);
 256 #else
 257                 atomic_add(rx_status.dropped_packets,
 258                              (atomic_t *)&priv->stats.rx_dropped);
 259 #endif
 260         }
 261
 262         return &priv->stats;
 263 }
 264
 265 /**
 266  * cvm_oct_common_change_mtu - change the link MTU
 267  * @dev:     Device to change
 268  * @new_mtu: The new MTU
 269  *
 270  * Returns Zero on success
 271  */
 272 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
 273 {
 274         struct octeon_ethernet *priv = netdev_priv(dev);
 275         int interface = INTERFACE(priv->port);
 276         int index = INDEX(priv->port);
 277 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
 278         int vlan_bytes = 4;
 279 #else
 280         int vlan_bytes = 0;
 281 #endif
 282
 283         /*
 284          * Limit the MTU to make sure the ethernet packets are between
 285          * 64 bytes and 65535 bytes.
 286          */
 287         if ((new_mtu + 14 + 4 + vlan_bytes < 64)
 288             || (new_mtu + 14 + 4 + vlan_bytes > 65392)) {
 289                 pr_err("MTU must be between %d and %d.\n",
 290                        64 - 14 - 4 - vlan_bytes, 65392 - 14 - 4 - vlan_bytes);
 291                 return -EINVAL;
 292         }
 293         dev->mtu = new_mtu;
 294
 295         if ((interface < 2)
 296             && (cvmx_helper_interface_get_mode(interface) !=
 297                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 298                 /* Add ethernet header and FCS, and VLAN if configured. */
 299                 int max_packet = new_mtu + 14 + 4 + vlan_bytes;
 300
 301                 if (OCTEON_IS_MODEL(OCTEON_CN3XXX)
 302                     || OCTEON_IS_MODEL(OCTEON_CN58XX)) {
 303                         /* Signal errors on packets larger than the MTU */
 304                         cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
 305                                        max_packet);
 306                 } else {
 307                         /*
 308                          * Set the hardware to truncate packets larger
 309                          * than the MTU and smaller the 64 bytes.
 310                          */
 311                         union cvmx_pip_frm_len_chkx frm_len_chk;
 312
 313                         frm_len_chk.u64 = 0;
 314                         frm_len_chk.s.minlen = 64;
 315                         frm_len_chk.s.maxlen = max_packet;
 316                         cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
 317                                        frm_len_chk.u64);
 318                 }
 319                 /*
 320                  * Set the hardware to truncate packets larger than
 321                  * the MTU. The jabber register must be set to a
 322                  * multiple of 8 bytes, so round up.
 323                  */
 324                 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
 325                                (max_packet + 7) & ~7u);
 326         }
 327         return 0;
 328 }
 329
 330 /**
 331  * cvm_oct_common_set_multicast_list - set the multicast list
 332  * @dev:    Device to work on
 333  */
 334 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
 335 {
 336         union cvmx_gmxx_prtx_cfg gmx_cfg;
 337         struct octeon_ethernet *priv = netdev_priv(dev);
 338         int interface = INTERFACE(priv->port);
 339         int index = INDEX(priv->port);
 340
 341         if ((interface < 2)
 342             && (cvmx_helper_interface_get_mode(interface) !=
 343                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 344                 union cvmx_gmxx_rxx_adr_ctl control;
 345
 346                 control.u64 = 0;
 347                 control.s.bcst = 1;     /* Allow broadcast MAC addresses */
 348
 349                 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
 350                     (dev->flags & IFF_PROMISC))
 351                         /* Force accept multicast packets */
 352                         control.s.mcst = 2;
 353                 else
 354                         /* Force reject multicast packets */
 355                         control.s.mcst = 1;
 356
 357                 if (dev->flags & IFF_PROMISC)
 358                         /*
 359                          * Reject matches if promisc. Since CAM is
 360                          * shut off, should accept everything.
 361                          */
 362                         control.s.cam_mode = 0;
 363                 else
 364                         /* Filter packets based on the CAM */
 365                         control.s.cam_mode = 1;
 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_RXX_ADR_CTL(index, interface),
 373                                control.u64);
 374                 if (dev->flags & IFF_PROMISC)
 375                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 376                                        (index, interface), 0);
 377                 else
 378                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 379                                        (index, interface), 1);
 380
 381                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 382                                gmx_cfg.u64);
 383         }
 384 }
 385
 386 /**
 387  * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
 388  * @dev:    The device in question.
 389  * @addr:   Address structure to change it too.
 390
 391  * Returns Zero on success
 392  */
 393 static int cvm_oct_set_mac_filter(struct net_device *dev)
 394 {
 395         struct octeon_ethernet *priv = netdev_priv(dev);
 396         union cvmx_gmxx_prtx_cfg gmx_cfg;
 397         int interface = INTERFACE(priv->port);
 398         int index = INDEX(priv->port);
 399
 400         if ((interface < 2)
 401             && (cvmx_helper_interface_get_mode(interface) !=
 402                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 403                 int i;
 404                 uint8_t *ptr = dev->dev_addr;
 405                 uint64_t mac = 0;
 406
 407                 for (i = 0; i < 6; i++)
 408                         mac = (mac << 8) | (uint64_t)ptr[i];
 409
 410                 gmx_cfg.u64 =
 411                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 412                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 413                                gmx_cfg.u64 & ~1ull);
 414
 415                 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
 416                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
 417                                ptr[0]);
 418                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
 419                                ptr[1]);
 420                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
 421                                ptr[2]);
 422                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
 423                                ptr[3]);
 424                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
 425                                ptr[4]);
 426                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
 427                                ptr[5]);
 428                 cvm_oct_common_set_multicast_list(dev);
 429                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 430                                gmx_cfg.u64);
 431         }
 432         return 0;
 433 }
 434
 435 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
 436 {
 437         int r = eth_mac_addr(dev, addr);
 438
 439         if (r)
 440                 return r;
 441         return cvm_oct_set_mac_filter(dev);
 442 }
 443
 444 /**
 445  * cvm_oct_common_init - per network device initialization
 446  * @dev:    Device to initialize
 447  *
 448  * Returns Zero on success
 449  */
 450 int cvm_oct_common_init(struct net_device *dev)
 451 {
 452         struct octeon_ethernet *priv = netdev_priv(dev);
 453         const u8 *mac = NULL;
 454
 455         if (priv->of_node)
 456                 mac = of_get_mac_address(priv->of_node);
 457
 458         if (mac)
 459                 ether_addr_copy(dev->dev_addr, mac);
 460         else
 461                 eth_hw_addr_random(dev);
 462
 463         /*
 464          * Force the interface to use the POW send if always_use_pow
 465          * was specified or it is in the pow send list.
 466          */
 467         if ((pow_send_group != -1)
 468             && (always_use_pow || strstr(pow_send_list, dev->name)))
 469                 priv->queue = -1;
 470
 471         if (priv->queue != -1) {
 472                 dev->features |= NETIF_F_SG;
 473                 if (USE_HW_TCPUDP_CHECKSUM)
 474                         dev->features |= NETIF_F_IP_CSUM;
 475         }
 476
 477         /* We do our own locking, Linux doesn't need to */
 478         dev->features |= NETIF_F_LLTX;
 479         dev->ethtool_ops = &cvm_oct_ethtool_ops;
 480
 481         cvm_oct_set_mac_filter(dev);
 482         dev->netdev_ops->ndo_change_mtu(dev, dev->mtu);
 483
 484         /*
 485          * Zero out stats for port so we won't mistakenly show
 486          * counters from the bootloader.
 487          */
 488         memset(dev->netdev_ops->ndo_get_stats(dev), 0,
 489                sizeof(struct net_device_stats));
 490
 491         if (dev->netdev_ops->ndo_stop)
 492                 dev->netdev_ops->ndo_stop(dev);
 493
 494         return 0;
 495 }
 496
 497 void cvm_oct_common_uninit(struct net_device *dev)
 498 {
 499         struct octeon_ethernet *priv = netdev_priv(dev);
 500
 501         if (priv->phydev)
 502                 phy_disconnect(priv->phydev);
 503 }
 504
 505 int cvm_oct_common_open(struct net_device *dev,
 506                         void (*link_poll)(struct net_device *), bool poll_now)
 507 {
 508         union cvmx_gmxx_prtx_cfg gmx_cfg;
 509         struct octeon_ethernet *priv = netdev_priv(dev);
 510         int interface = INTERFACE(priv->port);
 511         int index = INDEX(priv->port);
 512         cvmx_helper_link_info_t link_info;
 513         int rv;
 514
 515         rv = cvm_oct_phy_setup_device(dev);
 516         if (rv)
 517                 return rv;
 518
 519         gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 520         gmx_cfg.s.en = 1;
 521         cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
 522
 523         if (octeon_is_simulation())
 524                 return 0;
 525
 526         if (priv->phydev) {
 527                 int r = phy_read_status(priv->phydev);
 528
 529                 if (r == 0 && priv->phydev->link == 0)
 530                         netif_carrier_off(dev);
 531                 cvm_oct_adjust_link(dev);
 532         } else {
 533                 link_info = cvmx_helper_link_get(priv->port);
 534                 if (!link_info.s.link_up)
 535                         netif_carrier_off(dev);
 536                 priv->poll = link_poll;
 537                 if (poll_now)
 538                         link_poll(dev);
 539         }
 540
 541         return 0;
 542 }
 543
 544 void cvm_oct_link_poll(struct net_device *dev)
 545 {
 546         struct octeon_ethernet *priv = netdev_priv(dev);
 547         cvmx_helper_link_info_t link_info;
 548
 549         link_info = cvmx_helper_link_get(priv->port);
 550         if (link_info.u64 == priv->link_info)
 551                 return;
 552
 553         link_info = cvmx_helper_link_autoconf(priv->port);
 554         priv->link_info = link_info.u64;
 555
 556         if (link_info.s.link_up) {
 557                 if (!netif_carrier_ok(dev))
 558                         netif_carrier_on(dev);
 559         } else if (netif_carrier_ok(dev)) {
 560                 netif_carrier_off(dev);
 561         }
 562         cvm_oct_note_carrier(priv, link_info);
 563 }
 564
 565 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
 566         .ndo_init               = cvm_oct_common_init,
 567         .ndo_uninit             = cvm_oct_common_uninit,
 568         .ndo_start_xmit         = cvm_oct_xmit,
 569         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 570         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 571         .ndo_do_ioctl           = cvm_oct_ioctl,
 572         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 573         .ndo_get_stats          = cvm_oct_common_get_stats,
 574 #ifdef CONFIG_NET_POLL_CONTROLLER
 575         .ndo_poll_controller    = cvm_oct_poll_controller,
 576 #endif
 577 };
 578 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
 579         .ndo_init               = cvm_oct_xaui_init,
 580         .ndo_uninit             = cvm_oct_common_uninit,
 581         .ndo_open               = cvm_oct_xaui_open,
 582         .ndo_stop               = cvm_oct_common_stop,
 583         .ndo_start_xmit         = cvm_oct_xmit,
 584         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 585         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 586         .ndo_do_ioctl           = cvm_oct_ioctl,
 587         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 588         .ndo_get_stats          = cvm_oct_common_get_stats,
 589 #ifdef CONFIG_NET_POLL_CONTROLLER
 590         .ndo_poll_controller    = cvm_oct_poll_controller,
 591 #endif
 592 };
 593 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
 594         .ndo_init               = cvm_oct_sgmii_init,
 595         .ndo_uninit             = cvm_oct_common_uninit,
 596         .ndo_open               = cvm_oct_sgmii_open,
 597         .ndo_stop               = cvm_oct_common_stop,
 598         .ndo_start_xmit         = cvm_oct_xmit,
 599         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 600         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 601         .ndo_do_ioctl           = cvm_oct_ioctl,
 602         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 603         .ndo_get_stats          = cvm_oct_common_get_stats,
 604 #ifdef CONFIG_NET_POLL_CONTROLLER
 605         .ndo_poll_controller    = cvm_oct_poll_controller,
 606 #endif
 607 };
 608 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
 609         .ndo_init               = cvm_oct_spi_init,
 610         .ndo_uninit             = cvm_oct_spi_uninit,
 611         .ndo_start_xmit         = cvm_oct_xmit,
 612         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 613         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 614         .ndo_do_ioctl           = cvm_oct_ioctl,
 615         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 616         .ndo_get_stats          = cvm_oct_common_get_stats,
 617 #ifdef CONFIG_NET_POLL_CONTROLLER
 618         .ndo_poll_controller    = cvm_oct_poll_controller,
 619 #endif
 620 };
 621 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
 622         .ndo_init               = cvm_oct_rgmii_init,
 623         .ndo_uninit             = cvm_oct_rgmii_uninit,
 624         .ndo_open               = cvm_oct_rgmii_open,
 625         .ndo_stop               = cvm_oct_common_stop,
 626         .ndo_start_xmit         = cvm_oct_xmit,
 627         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 628         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 629         .ndo_do_ioctl           = cvm_oct_ioctl,
 630         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 631         .ndo_get_stats          = cvm_oct_common_get_stats,
 632 #ifdef CONFIG_NET_POLL_CONTROLLER
 633         .ndo_poll_controller    = cvm_oct_poll_controller,
 634 #endif
 635 };
 636 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
 637         .ndo_init               = cvm_oct_common_init,
 638         .ndo_start_xmit         = cvm_oct_xmit_pow,
 639         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 640         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 641         .ndo_do_ioctl           = cvm_oct_ioctl,
 642         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 643         .ndo_get_stats          = cvm_oct_common_get_stats,
 644 #ifdef CONFIG_NET_POLL_CONTROLLER
 645         .ndo_poll_controller    = cvm_oct_poll_controller,
 646 #endif
 647 };
 648
 649 static struct device_node *cvm_oct_of_get_child(
 650                                 const struct device_node *parent, int reg_val)
 651 {
 652         struct device_node *node = NULL;
 653         int size;
 654         const __be32 *addr;
 655
 656         for (;;) {
 657                 node = of_get_next_child(parent, node);
 658                 if (!node)
 659                         break;
 660                 addr = of_get_property(node, "reg", &size);
 661                 if (addr && (be32_to_cpu(*addr) == reg_val))
 662                         break;
 663         }
 664         return node;
 665 }
 666
 667 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
 668                                                         int interface, int port)
 669 {
 670         struct device_node *ni, *np;
 671
 672         ni = cvm_oct_of_get_child(pip, interface);
 673         if (!ni)
 674                 return NULL;
 675
 676         np = cvm_oct_of_get_child(ni, port);
 677         of_node_put(ni);
 678
 679         return np;
 680 }
 681
 682 static int cvm_oct_probe(struct platform_device *pdev)
 683 {
 684         int num_interfaces;
 685         int interface;
 686         int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
 687         int qos;
 688         struct device_node *pip;
 689
 690         octeon_mdiobus_force_mod_depencency();
 691         pr_notice("cavium-ethernet %s\n", OCTEON_ETHERNET_VERSION);
 692
 693         pip = pdev->dev.of_node;
 694         if (!pip) {
 695                 pr_err("Error: No 'pip' in /aliases\n");
 696                 return -EINVAL;
 697         }
 698
 699         cvm_oct_poll_queue = create_singlethread_workqueue("octeon-ethernet");
 700         if (cvm_oct_poll_queue == NULL) {
 701                 pr_err("octeon-ethernet: Cannot create workqueue");
 702                 return -ENOMEM;
 703         }
 704
 705         cvm_oct_configure_common_hw();
 706
 707         cvmx_helper_initialize_packet_io_global();
 708
 709         /* Change the input group for all ports before input is enabled */
 710         num_interfaces = cvmx_helper_get_number_of_interfaces();
 711         for (interface = 0; interface < num_interfaces; interface++) {
 712                 int num_ports = cvmx_helper_ports_on_interface(interface);
 713                 int port;
 714
 715                 for (port = cvmx_helper_get_ipd_port(interface, 0);
 716                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 717                      port++) {
 718                         union cvmx_pip_prt_tagx pip_prt_tagx;
 719
 720                         pip_prt_tagx.u64 =
 721                             cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
 722                         pip_prt_tagx.s.grp = pow_receive_group;
 723                         cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
 724                                        pip_prt_tagx.u64);
 725                 }
 726         }
 727
 728         cvmx_helper_ipd_and_packet_input_enable();
 729
 730         memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
 731
 732         /*
 733          * Initialize the FAU used for counting packet buffers that
 734          * need to be freed.
 735          */
 736         cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
 737
 738         /* Initialize the FAU used for counting tx SKBs that need to be freed */
 739         cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
 740
 741         if ((pow_send_group != -1)) {
 742                 struct net_device *dev;
 743
 744                 pr_info("\tConfiguring device for POW only access\n");
 745                 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
 746                 if (dev) {
 747                         /* Initialize the device private structure. */
 748                         struct octeon_ethernet *priv = netdev_priv(dev);
 749
 750                         dev->netdev_ops = &cvm_oct_pow_netdev_ops;
 751                         priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
 752                         priv->port = CVMX_PIP_NUM_INPUT_PORTS;
 753                         priv->queue = -1;
 754                         strcpy(dev->name, "pow%d");
 755                         for (qos = 0; qos < 16; qos++)
 756                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 757
 758                         if (register_netdev(dev) < 0) {
 759                                 pr_err("Failed to register ethernet device for POW\n");
 760                                 free_netdev(dev);
 761                         } else {
 762                                 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
 763                                 pr_info("%s: POW send group %d, receive group %d\n",
 764                                         dev->name, pow_send_group,
 765                                         pow_receive_group);
 766                         }
 767                 } else {
 768                         pr_err("Failed to allocate ethernet device for POW\n");
 769                 }
 770         }
 771
 772         num_interfaces = cvmx_helper_get_number_of_interfaces();
 773         for (interface = 0; interface < num_interfaces; interface++) {
 774                 cvmx_helper_interface_mode_t imode =
 775                     cvmx_helper_interface_get_mode(interface);
 776                 int num_ports = cvmx_helper_ports_on_interface(interface);
 777                 int port;
 778                 int port_index;
 779
 780                 for (port_index = 0,
 781                      port = cvmx_helper_get_ipd_port(interface, 0);
 782                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 783                      port_index++, port++) {
 784                         struct octeon_ethernet *priv;
 785                         struct net_device *dev =
 786                             alloc_etherdev(sizeof(struct octeon_ethernet));
 787                         if (!dev) {
 788                                 pr_err("Failed to allocate ethernet device for port %d\n",
 789                                        port);
 790                                 continue;
 791                         }
 792
 793                         /* Initialize the device private structure. */
 794                         priv = netdev_priv(dev);
 795                         priv->netdev = dev;
 796                         priv->of_node = cvm_oct_node_for_port(pip, interface,
 797                                                                 port_index);
 798
 799                         INIT_DELAYED_WORK(&priv->port_periodic_work,
 800                                           cvm_oct_periodic_worker);
 801                         priv->imode = imode;
 802                         priv->port = port;
 803                         priv->queue = cvmx_pko_get_base_queue(priv->port);
 804                         priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
 805                         for (qos = 0; qos < 16; qos++)
 806                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 807                         for (qos = 0; qos < cvmx_pko_get_num_queues(port);
 808                              qos++)
 809                                 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
 810
 811                         switch (priv->imode) {
 812
 813                         /* These types don't support ports to IPD/PKO */
 814                         case CVMX_HELPER_INTERFACE_MODE_DISABLED:
 815                         case CVMX_HELPER_INTERFACE_MODE_PCIE:
 816                         case CVMX_HELPER_INTERFACE_MODE_PICMG:
 817                                 break;
 818
 819                         case CVMX_HELPER_INTERFACE_MODE_NPI:
 820                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 821                                 strcpy(dev->name, "npi%d");
 822                                 break;
 823
 824                         case CVMX_HELPER_INTERFACE_MODE_XAUI:
 825                                 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
 826                                 strcpy(dev->name, "xaui%d");
 827                                 break;
 828
 829                         case CVMX_HELPER_INTERFACE_MODE_LOOP:
 830                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 831                                 strcpy(dev->name, "loop%d");
 832                                 break;
 833
 834                         case CVMX_HELPER_INTERFACE_MODE_SGMII:
 835                                 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
 836                                 strcpy(dev->name, "eth%d");
 837                                 break;
 838
 839                         case CVMX_HELPER_INTERFACE_MODE_SPI:
 840                                 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
 841                                 strcpy(dev->name, "spi%d");
 842                                 break;
 843
 844                         case CVMX_HELPER_INTERFACE_MODE_RGMII:
 845                         case CVMX_HELPER_INTERFACE_MODE_GMII:
 846                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 847                                 strcpy(dev->name, "eth%d");
 848                                 break;
 849                         }
 850
 851                         if (!dev->netdev_ops) {
 852                                 free_netdev(dev);
 853                         } else if (register_netdev(dev) < 0) {
 854                                 pr_err("Failed to register ethernet device for interface %d, port %d\n",
 855                                          interface, priv->port);
 856                                 free_netdev(dev);
 857                         } else {
 858                                 cvm_oct_device[priv->port] = dev;
 859                                 fau -=
 860                                     cvmx_pko_get_num_queues(priv->port) *
 861                                     sizeof(uint32_t);
 862                                 queue_delayed_work(cvm_oct_poll_queue,
 863                                                 &priv->port_periodic_work, HZ);
 864                         }
 865                 }
 866         }
 867
 868         cvm_oct_tx_initialize();
 869         cvm_oct_rx_initialize();
 870
 871         /*
 872          * 150 uS: about 10 1500-byte packets at 1GE.
 873          */
 874         cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
 875
 876         queue_delayed_work(cvm_oct_poll_queue, &cvm_oct_rx_refill_work, HZ);
 877
 878         return 0;
 879 }
 880
 881 static int cvm_oct_remove(struct platform_device *pdev)
 882 {
 883         int port;
 884
 885         /* Disable POW interrupt */
 886         cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), 0);
 887
 888         cvmx_ipd_disable();
 889
 890         /* Free the interrupt handler */
 891         free_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, cvm_oct_device);
 892
 893         atomic_inc_return(&cvm_oct_poll_queue_stopping);
 894         cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
 895
 896         cvm_oct_rx_shutdown();
 897         cvm_oct_tx_shutdown();
 898
 899         cvmx_pko_disable();
 900
 901         /* Free the ethernet devices */
 902         for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
 903                 if (cvm_oct_device[port]) {
 904                         struct net_device *dev = cvm_oct_device[port];
 905                         struct octeon_ethernet *priv = netdev_priv(dev);
 906
 907                         cancel_delayed_work_sync(&priv->port_periodic_work);
 908
 909                         cvm_oct_tx_shutdown_dev(dev);
 910                         unregister_netdev(dev);
 911                         free_netdev(dev);
 912                         cvm_oct_device[port] = NULL;
 913                 }
 914         }
 915
 916         destroy_workqueue(cvm_oct_poll_queue);
 917
 918         cvmx_pko_shutdown();
 919
 920         cvmx_ipd_free_ptr();
 921
 922         /* Free the HW pools */
 923         cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 924                               num_packet_buffers);
 925         cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 926                               num_packet_buffers);
 927         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 928                 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 929                                       CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
 930         return 0;
 931 }
 932
 933 static const struct of_device_id cvm_oct_match[] = {
 934         {
 935                 .compatible = "cavium,octeon-3860-pip",
 936         },
 937         {},
 938 };
 939 MODULE_DEVICE_TABLE(of, cvm_oct_match);
 940
 941 static struct platform_driver cvm_oct_driver = {
 942         .probe          = cvm_oct_probe,
 943         .remove         = cvm_oct_remove,
 944         .driver         = {
 945                 .name   = KBUILD_MODNAME,
 946                 .of_match_table = cvm_oct_match,
 947         },
 948 };
 949
 950 module_platform_driver(cvm_oct_driver);
 951
 952 MODULE_LICENSE("GPL");
 953 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
 954 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");