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/kernel.h>
  28 #include <linux/init.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
  35 #include <net/dst.h>
  36
  37 #include <asm/octeon/octeon.h>
  38
  39 #include "ethernet-defines.h"
  40 #include "octeon-ethernet.h"
  41 #include "ethernet-mem.h"
  42 #include "ethernet-rx.h"
  43 #include "ethernet-tx.h"
  44 #include "ethernet-mdio.h"
  45 #include "ethernet-util.h"
  46
  47 #include "cvmx-pip.h"
  48 #include "cvmx-pko.h"
  49 #include "cvmx-fau.h"
  50 #include "cvmx-ipd.h"
  51 #include "cvmx-helper.h"
  52
  53 #include "cvmx-gmxx-defs.h"
  54 #include "cvmx-smix-defs.h"
  55
  56 #if defined(CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS) \
  57         && CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS
  58 int num_packet_buffers = CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS;
  59 #else
  60 int num_packet_buffers = 1024;
  61 #endif
  62 module_param(num_packet_buffers, int, 0444);
  63 MODULE_PARM_DESC(num_packet_buffers, "\n"
  64         "\tNumber of packet buffers to allocate and store in the\n"
  65         "\tFPA. By default, 1024 packet buffers are used unless\n"
  66         "\tCONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS is defined.");
  67
  68 int pow_receive_group = 15;
  69 module_param(pow_receive_group, int, 0444);
  70 MODULE_PARM_DESC(pow_receive_group, "\n"
  71         "\tPOW group to receive packets from. All ethernet hardware\n"
  72         "\twill be configured to send incomming packets to this POW\n"
  73         "\tgroup. Also any other software can submit packets to this\n"
  74         "\tgroup for the kernel to process.");
  75
  76 int pow_send_group = -1;
  77 module_param(pow_send_group, int, 0644);
  78 MODULE_PARM_DESC(pow_send_group, "\n"
  79         "\tPOW group to send packets to other software on. This\n"
  80         "\tcontrols the creation of the virtual device pow0.\n"
  81         "\talways_use_pow also depends on this value.");
  82
  83 int always_use_pow;
  84 module_param(always_use_pow, int, 0444);
  85 MODULE_PARM_DESC(always_use_pow, "\n"
  86         "\tWhen set, always send to the pow group. This will cause\n"
  87         "\tpackets sent to real ethernet devices to be sent to the\n"
  88         "\tPOW group instead of the hardware. Unless some other\n"
  89         "\tapplication changes the config, packets will still be\n"
  90         "\treceived from the low level hardware. Use this option\n"
  91         "\tto allow a CVMX app to intercept all packets from the\n"
  92         "\tlinux kernel. You must specify pow_send_group along with\n"
  93         "\tthis option.");
  94
  95 char pow_send_list[128] = "";
  96 module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444);
  97 MODULE_PARM_DESC(pow_send_list, "\n"
  98         "\tComma separated list of ethernet devices that should use the\n"
  99         "\tPOW for transmit instead of the actual ethernet hardware. This\n"
 100         "\tis a per port version of always_use_pow. always_use_pow takes\n"
 101         "\tprecedence over this list. For example, setting this to\n"
 102         "\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n"
 103         "\tusing the pow_send_group.");
 104
 105 int max_rx_cpus = -1;
 106 module_param(max_rx_cpus, int, 0444);
 107 MODULE_PARM_DESC(max_rx_cpus, "\n"
 108         "\t\tThe maximum number of CPUs to use for packet reception.\n"
 109         "\t\tUse -1 to use all available CPUs.");
 110
 111 int rx_napi_weight = 32;
 112 module_param(rx_napi_weight, int, 0444);
 113 MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter.");
 114
 115 /*
 116  * The offset from mac_addr_base that should be used for the next port
 117  * that is configured.  By convention, if any mgmt ports exist on the
 118  * chip, they get the first mac addresses, The ports controlled by
 119  * this driver are numbered sequencially following any mgmt addresses
 120  * that may exist.
 121  */
 122 static unsigned int cvm_oct_mac_addr_offset;
 123
 124 /**
 125  * cvm_oct_poll_queue - Workqueue for polling operations.
 126  */
 127 struct workqueue_struct *cvm_oct_poll_queue;
 128
 129 /**
 130  * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
 131  *
 132  * Set to one right before cvm_oct_poll_queue is destroyed.
 133  */
 134 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
 135
 136 /**
 137  * Array of every ethernet device owned by this driver indexed by
 138  * the ipd input port number.
 139  */
 140 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
 141
 142 u64 cvm_oct_tx_poll_interval;
 143
 144 static void cvm_oct_rx_refill_worker(struct work_struct *work);
 145 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
 146
 147 static void cvm_oct_rx_refill_worker(struct work_struct *work)
 148 {
 149         /*
 150          * FPA 0 may have been drained, try to refill it if we need
 151          * more than num_packet_buffers / 2, otherwise normal receive
 152          * processing will refill it.  If it were drained, no packets
 153          * could be received so cvm_oct_napi_poll would never be
 154          * invoked to do the refill.
 155          */
 156         cvm_oct_rx_refill_pool(num_packet_buffers / 2);
 157
 158         if (!atomic_read(&cvm_oct_poll_queue_stopping))
 159                 queue_delayed_work(cvm_oct_poll_queue,
 160                                    &cvm_oct_rx_refill_work, HZ);
 161 }
 162
 163 static void cvm_oct_periodic_worker(struct work_struct *work)
 164 {
 165         struct octeon_ethernet *priv = container_of(work,
 166                                                     struct octeon_ethernet,
 167                                                     port_periodic_work.work);
 168
 169         if (priv->poll)
 170                 priv->poll(cvm_oct_device[priv->port]);
 171
 172         cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats(cvm_oct_device[priv->port]);
 173
 174         if (!atomic_read(&cvm_oct_poll_queue_stopping))
 175                 queue_delayed_work(cvm_oct_poll_queue, &priv->port_periodic_work, HZ);
 176  }
 177
 178 static __init void cvm_oct_configure_common_hw(void)
 179 {
 180         /* Setup the FPA */
 181         cvmx_fpa_enable();
 182         cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 183                              num_packet_buffers);
 184         cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 185                              num_packet_buffers);
 186         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 187                 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 188                                      CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
 189
 190         if (USE_RED)
 191                 cvmx_helper_setup_red(num_packet_buffers / 4,
 192                                       num_packet_buffers / 8);
 193
 194 }
 195
 196 /**
 197  * cvm_oct_free_work- Free a work queue entry
 198  *
 199  * @work_queue_entry: Work queue entry to free
 200  *
 201  * Returns Zero on success, Negative on failure.
 202  */
 203 int cvm_oct_free_work(void *work_queue_entry)
 204 {
 205         cvmx_wqe_t *work = work_queue_entry;
 206
 207         int segments = work->word2.s.bufs;
 208         union cvmx_buf_ptr segment_ptr = work->packet_ptr;
 209
 210         while (segments--) {
 211                 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
 212                         cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
 213                 if (unlikely(!segment_ptr.s.i))
 214                         cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
 215                                       segment_ptr.s.pool,
 216                                       DONT_WRITEBACK(CVMX_FPA_PACKET_POOL_SIZE /
 217                                                      128));
 218                 segment_ptr = next_ptr;
 219         }
 220         cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, DONT_WRITEBACK(1));
 221
 222         return 0;
 223 }
 224 EXPORT_SYMBOL(cvm_oct_free_work);
 225
 226 /**
 227  * cvm_oct_common_get_stats - get the low level ethernet statistics
 228  * @dev:    Device to get the statistics from
 229  *
 230  * Returns Pointer to the statistics
 231  */
 232 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
 233 {
 234         cvmx_pip_port_status_t rx_status;
 235         cvmx_pko_port_status_t tx_status;
 236         struct octeon_ethernet *priv = netdev_priv(dev);
 237
 238         if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
 239                 if (octeon_is_simulation()) {
 240                         /* The simulator doesn't support statistics */
 241                         memset(&rx_status, 0, sizeof(rx_status));
 242                         memset(&tx_status, 0, sizeof(tx_status));
 243                 } else {
 244                         cvmx_pip_get_port_status(priv->port, 1, &rx_status);
 245                         cvmx_pko_get_port_status(priv->port, 1, &tx_status);
 246                 }
 247
 248                 priv->stats.rx_packets += rx_status.inb_packets;
 249                 priv->stats.tx_packets += tx_status.packets;
 250                 priv->stats.rx_bytes += rx_status.inb_octets;
 251                 priv->stats.tx_bytes += tx_status.octets;
 252                 priv->stats.multicast += rx_status.multicast_packets;
 253                 priv->stats.rx_crc_errors += rx_status.inb_errors;
 254                 priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
 255
 256                 /*
 257                  * The drop counter must be incremented atomically
 258                  * since the RX tasklet also increments it.
 259                  */
 260 #ifdef CONFIG_64BIT
 261                 atomic64_add(rx_status.dropped_packets,
 262                              (atomic64_t *)&priv->stats.rx_dropped);
 263 #else
 264                 atomic_add(rx_status.dropped_packets,
 265                              (atomic_t *)&priv->stats.rx_dropped);
 266 #endif
 267         }
 268
 269         return &priv->stats;
 270 }
 271
 272 /**
 273  * cvm_oct_common_change_mtu - change the link MTU
 274  * @dev:     Device to change
 275  * @new_mtu: The new MTU
 276  *
 277  * Returns Zero on success
 278  */
 279 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
 280 {
 281         struct octeon_ethernet *priv = netdev_priv(dev);
 282         int interface = INTERFACE(priv->port);
 283         int index = INDEX(priv->port);
 284 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
 285         int vlan_bytes = 4;
 286 #else
 287         int vlan_bytes = 0;
 288 #endif
 289
 290         /*
 291          * Limit the MTU to make sure the ethernet packets are between
 292          * 64 bytes and 65535 bytes.
 293          */
 294         if ((new_mtu + 14 + 4 + vlan_bytes < 64)
 295             || (new_mtu + 14 + 4 + vlan_bytes > 65392)) {
 296                 pr_err("MTU must be between %d and %d.\n",
 297                        64 - 14 - 4 - vlan_bytes, 65392 - 14 - 4 - vlan_bytes);
 298                 return -EINVAL;
 299         }
 300         dev->mtu = new_mtu;
 301
 302         if ((interface < 2)
 303             && (cvmx_helper_interface_get_mode(interface) !=
 304                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 305                 /* Add ethernet header and FCS, and VLAN if configured. */
 306                 int max_packet = new_mtu + 14 + 4 + vlan_bytes;
 307
 308                 if (OCTEON_IS_MODEL(OCTEON_CN3XXX)
 309                     || OCTEON_IS_MODEL(OCTEON_CN58XX)) {
 310                         /* Signal errors on packets larger than the MTU */
 311                         cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
 312                                        max_packet);
 313                 } else {
 314                         /*
 315                          * Set the hardware to truncate packets larger
 316                          * than the MTU and smaller the 64 bytes.
 317                          */
 318                         union cvmx_pip_frm_len_chkx frm_len_chk;
 319                         frm_len_chk.u64 = 0;
 320                         frm_len_chk.s.minlen = 64;
 321                         frm_len_chk.s.maxlen = max_packet;
 322                         cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
 323                                        frm_len_chk.u64);
 324                 }
 325                 /*
 326                  * Set the hardware to truncate packets larger than
 327                  * the MTU. The jabber register must be set to a
 328                  * multiple of 8 bytes, so round up.
 329                  */
 330                 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
 331                                (max_packet + 7) & ~7u);
 332         }
 333         return 0;
 334 }
 335
 336 /**
 337  * cvm_oct_common_set_multicast_list - set the multicast list
 338  * @dev:    Device to work on
 339  */
 340 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
 341 {
 342         union cvmx_gmxx_prtx_cfg gmx_cfg;
 343         struct octeon_ethernet *priv = netdev_priv(dev);
 344         int interface = INTERFACE(priv->port);
 345         int index = INDEX(priv->port);
 346
 347         if ((interface < 2)
 348             && (cvmx_helper_interface_get_mode(interface) !=
 349                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 350                 union cvmx_gmxx_rxx_adr_ctl control;
 351                 control.u64 = 0;
 352                 control.s.bcst = 1;     /* Allow broadcast MAC addresses */
 353
 354                 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
 355                     (dev->flags & IFF_PROMISC))
 356                         /* Force accept multicast packets */
 357                         control.s.mcst = 2;
 358                 else
 359                         /* Force reject multicat packets */
 360                         control.s.mcst = 1;
 361
 362                 if (dev->flags & IFF_PROMISC)
 363                         /*
 364                          * Reject matches if promisc. Since CAM is
 365                          * shut off, should accept everything.
 366                          */
 367                         control.s.cam_mode = 0;
 368                 else
 369                         /* Filter packets based on the CAM */
 370                         control.s.cam_mode = 1;
 371
 372                 gmx_cfg.u64 =
 373                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 374                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 375                                gmx_cfg.u64 & ~1ull);
 376
 377                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
 378                                control.u64);
 379                 if (dev->flags & IFF_PROMISC)
 380                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 381                                        (index, interface), 0);
 382                 else
 383                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 384                                        (index, interface), 1);
 385
 386                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 387                                gmx_cfg.u64);
 388         }
 389 }
 390
 391 /**
 392  * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
 393  * @dev:    The device in question.
 394  * @addr:   Address structure to change it too.
 395
 396  * Returns Zero on success
 397  */
 398 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
 399 {
 400         struct octeon_ethernet *priv = netdev_priv(dev);
 401         union cvmx_gmxx_prtx_cfg gmx_cfg;
 402         int interface = INTERFACE(priv->port);
 403         int index = INDEX(priv->port);
 404
 405         memcpy(dev->dev_addr, addr + 2, 6);
 406
 407         if ((interface < 2)
 408             && (cvmx_helper_interface_get_mode(interface) !=
 409                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 410                 int i;
 411                 uint8_t *ptr = addr;
 412                 uint64_t mac = 0;
 413                 for (i = 0; i < 6; i++)
 414                         mac = (mac << 8) | (uint64_t) (ptr[i + 2]);
 415
 416                 gmx_cfg.u64 =
 417                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 418                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 419                                gmx_cfg.u64 & ~1ull);
 420
 421                 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
 422                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
 423                                ptr[2]);
 424                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
 425                                ptr[3]);
 426                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
 427                                ptr[4]);
 428                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
 429                                ptr[5]);
 430                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
 431                                ptr[6]);
 432                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
 433                                ptr[7]);
 434                 cvm_oct_common_set_multicast_list(dev);
 435                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 436                                gmx_cfg.u64);
 437         }
 438         return 0;
 439 }
 440
 441 /**
 442  * cvm_oct_common_init - per network device initialization
 443  * @dev:    Device to initialize
 444  *
 445  * Returns Zero on success
 446  */
 447 int cvm_oct_common_init(struct net_device *dev)
 448 {
 449         struct octeon_ethernet *priv = netdev_priv(dev);
 450         struct sockaddr sa;
 451         u64 mac = ((u64)(octeon_bootinfo->mac_addr_base[0] & 0xff) << 40) |
 452                 ((u64)(octeon_bootinfo->mac_addr_base[1] & 0xff) << 32) |
 453                 ((u64)(octeon_bootinfo->mac_addr_base[2] & 0xff) << 24) |
 454                 ((u64)(octeon_bootinfo->mac_addr_base[3] & 0xff) << 16) |
 455                 ((u64)(octeon_bootinfo->mac_addr_base[4] & 0xff) << 8) |
 456                 (u64)(octeon_bootinfo->mac_addr_base[5] & 0xff);
 457
 458         mac += cvm_oct_mac_addr_offset;
 459         sa.sa_data[0] = (mac >> 40) & 0xff;
 460         sa.sa_data[1] = (mac >> 32) & 0xff;
 461         sa.sa_data[2] = (mac >> 24) & 0xff;
 462         sa.sa_data[3] = (mac >> 16) & 0xff;
 463         sa.sa_data[4] = (mac >> 8) & 0xff;
 464         sa.sa_data[5] = mac & 0xff;
 465
 466         if (cvm_oct_mac_addr_offset >= octeon_bootinfo->mac_addr_count)
 467                 printk(KERN_DEBUG "%s: Using MAC outside of the assigned range:"
 468                         " %pM\n", dev->name, sa.sa_data);
 469         cvm_oct_mac_addr_offset++;
 470
 471         /*
 472          * Force the interface to use the POW send if always_use_pow
 473          * was specified or it is in the pow send list.
 474          */
 475         if ((pow_send_group != -1)
 476             && (always_use_pow || strstr(pow_send_list, dev->name)))
 477                 priv->queue = -1;
 478
 479         if (priv->queue != -1) {
 480                 dev->features |= NETIF_F_SG;
 481                 if (USE_HW_TCPUDP_CHECKSUM)
 482                         dev->features |= NETIF_F_IP_CSUM;
 483         }
 484
 485         /* We do our own locking, Linux doesn't need to */
 486         dev->features |= NETIF_F_LLTX;
 487         SET_ETHTOOL_OPS(dev, &cvm_oct_ethtool_ops);
 488
 489         cvm_oct_phy_setup_device(dev);
 490         dev->netdev_ops->ndo_set_mac_address(dev, &sa);
 491         dev->netdev_ops->ndo_change_mtu(dev, dev->mtu);
 492
 493         /*
 494          * Zero out stats for port so we won't mistakenly show
 495          * counters from the bootloader.
 496          */
 497         memset(dev->netdev_ops->ndo_get_stats(dev), 0,
 498                sizeof(struct net_device_stats));
 499
 500         return 0;
 501 }
 502
 503 void cvm_oct_common_uninit(struct net_device *dev)
 504 {
 505         struct octeon_ethernet *priv = netdev_priv(dev);
 506
 507         if (priv->phydev)
 508                 phy_disconnect(priv->phydev);
 509 }
 510
 511 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
 512         .ndo_init               = cvm_oct_common_init,
 513         .ndo_uninit             = cvm_oct_common_uninit,
 514         .ndo_start_xmit         = cvm_oct_xmit,
 515         .ndo_set_multicast_list = cvm_oct_common_set_multicast_list,
 516         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 517         .ndo_do_ioctl           = cvm_oct_ioctl,
 518         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 519         .ndo_get_stats          = cvm_oct_common_get_stats,
 520 #ifdef CONFIG_NET_POLL_CONTROLLER
 521         .ndo_poll_controller    = cvm_oct_poll_controller,
 522 #endif
 523 };
 524 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
 525         .ndo_init               = cvm_oct_xaui_init,
 526         .ndo_uninit             = cvm_oct_xaui_uninit,
 527         .ndo_open               = cvm_oct_xaui_open,
 528         .ndo_stop               = cvm_oct_xaui_stop,
 529         .ndo_start_xmit         = cvm_oct_xmit,
 530         .ndo_set_multicast_list = cvm_oct_common_set_multicast_list,
 531         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 532         .ndo_do_ioctl           = cvm_oct_ioctl,
 533         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 534         .ndo_get_stats          = cvm_oct_common_get_stats,
 535 #ifdef CONFIG_NET_POLL_CONTROLLER
 536         .ndo_poll_controller    = cvm_oct_poll_controller,
 537 #endif
 538 };
 539 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
 540         .ndo_init               = cvm_oct_sgmii_init,
 541         .ndo_uninit             = cvm_oct_sgmii_uninit,
 542         .ndo_open               = cvm_oct_sgmii_open,
 543         .ndo_stop               = cvm_oct_sgmii_stop,
 544         .ndo_start_xmit         = cvm_oct_xmit,
 545         .ndo_set_multicast_list = cvm_oct_common_set_multicast_list,
 546         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 547         .ndo_do_ioctl           = cvm_oct_ioctl,
 548         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 549         .ndo_get_stats          = cvm_oct_common_get_stats,
 550 #ifdef CONFIG_NET_POLL_CONTROLLER
 551         .ndo_poll_controller    = cvm_oct_poll_controller,
 552 #endif
 553 };
 554 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
 555         .ndo_init               = cvm_oct_spi_init,
 556         .ndo_uninit             = cvm_oct_spi_uninit,
 557         .ndo_start_xmit         = cvm_oct_xmit,
 558         .ndo_set_multicast_list = cvm_oct_common_set_multicast_list,
 559         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 560         .ndo_do_ioctl           = cvm_oct_ioctl,
 561         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 562         .ndo_get_stats          = cvm_oct_common_get_stats,
 563 #ifdef CONFIG_NET_POLL_CONTROLLER
 564         .ndo_poll_controller    = cvm_oct_poll_controller,
 565 #endif
 566 };
 567 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
 568         .ndo_init               = cvm_oct_rgmii_init,
 569         .ndo_uninit             = cvm_oct_rgmii_uninit,
 570         .ndo_open               = cvm_oct_rgmii_open,
 571         .ndo_stop               = cvm_oct_rgmii_stop,
 572         .ndo_start_xmit         = cvm_oct_xmit,
 573         .ndo_set_multicast_list = cvm_oct_common_set_multicast_list,
 574         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 575         .ndo_do_ioctl           = cvm_oct_ioctl,
 576         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 577         .ndo_get_stats          = cvm_oct_common_get_stats,
 578 #ifdef CONFIG_NET_POLL_CONTROLLER
 579         .ndo_poll_controller    = cvm_oct_poll_controller,
 580 #endif
 581 };
 582 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
 583         .ndo_init               = cvm_oct_common_init,
 584         .ndo_start_xmit         = cvm_oct_xmit_pow,
 585         .ndo_set_multicast_list = cvm_oct_common_set_multicast_list,
 586         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 587         .ndo_do_ioctl           = cvm_oct_ioctl,
 588         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 589         .ndo_get_stats          = cvm_oct_common_get_stats,
 590 #ifdef CONFIG_NET_POLL_CONTROLLER
 591         .ndo_poll_controller    = cvm_oct_poll_controller,
 592 #endif
 593 };
 594
 595 extern void octeon_mdiobus_force_mod_depencency(void);
 596
 597 static int __init cvm_oct_init_module(void)
 598 {
 599         int num_interfaces;
 600         int interface;
 601         int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
 602         int qos;
 603
 604         octeon_mdiobus_force_mod_depencency();
 605         pr_notice("cavium-ethernet %s\n", OCTEON_ETHERNET_VERSION);
 606
 607         if (OCTEON_IS_MODEL(OCTEON_CN52XX))
 608                 cvm_oct_mac_addr_offset = 2; /* First two are the mgmt ports. */
 609         else if (OCTEON_IS_MODEL(OCTEON_CN56XX))
 610                 cvm_oct_mac_addr_offset = 1; /* First one is the mgmt port. */
 611         else
 612                 cvm_oct_mac_addr_offset = 0;
 613
 614         cvm_oct_poll_queue = create_singlethread_workqueue("octeon-ethernet");
 615         if (cvm_oct_poll_queue == NULL) {
 616                 pr_err("octeon-ethernet: Cannot create workqueue");
 617                 return -ENOMEM;
 618         }
 619
 620         cvm_oct_configure_common_hw();
 621
 622         cvmx_helper_initialize_packet_io_global();
 623
 624         /* Change the input group for all ports before input is enabled */
 625         num_interfaces = cvmx_helper_get_number_of_interfaces();
 626         for (interface = 0; interface < num_interfaces; interface++) {
 627                 int num_ports = cvmx_helper_ports_on_interface(interface);
 628                 int port;
 629
 630                 for (port = cvmx_helper_get_ipd_port(interface, 0);
 631                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 632                      port++) {
 633                         union cvmx_pip_prt_tagx pip_prt_tagx;
 634                         pip_prt_tagx.u64 =
 635                             cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
 636                         pip_prt_tagx.s.grp = pow_receive_group;
 637                         cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
 638                                        pip_prt_tagx.u64);
 639                 }
 640         }
 641
 642         cvmx_helper_ipd_and_packet_input_enable();
 643
 644         memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
 645
 646         /*
 647          * Initialize the FAU used for counting packet buffers that
 648          * need to be freed.
 649          */
 650         cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
 651
 652         /* Initialize the FAU used for counting tx SKBs that need to be freed */
 653         cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
 654
 655         if ((pow_send_group != -1)) {
 656                 struct net_device *dev;
 657                 pr_info("\tConfiguring device for POW only access\n");
 658                 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
 659                 if (dev) {
 660                         /* Initialize the device private structure. */
 661                         struct octeon_ethernet *priv = netdev_priv(dev);
 662
 663                         dev->netdev_ops = &cvm_oct_pow_netdev_ops;
 664                         priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
 665                         priv->port = CVMX_PIP_NUM_INPUT_PORTS;
 666                         priv->queue = -1;
 667                         strcpy(dev->name, "pow%d");
 668                         for (qos = 0; qos < 16; qos++)
 669                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 670
 671                         if (register_netdev(dev) < 0) {
 672                                 pr_err("Failed to register ethernet device for POW\n");
 673                                 free_netdev(dev);
 674                         } else {
 675                                 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
 676                                 pr_info("%s: POW send group %d, receive group %d\n",
 677                                         dev->name, pow_send_group,
 678                                         pow_receive_group);
 679                         }
 680                 } else {
 681                         pr_err("Failed to allocate ethernet device for POW\n");
 682                 }
 683         }
 684
 685         num_interfaces = cvmx_helper_get_number_of_interfaces();
 686         for (interface = 0; interface < num_interfaces; interface++) {
 687                 cvmx_helper_interface_mode_t imode =
 688                     cvmx_helper_interface_get_mode(interface);
 689                 int num_ports = cvmx_helper_ports_on_interface(interface);
 690                 int port;
 691
 692                 for (port = cvmx_helper_get_ipd_port(interface, 0);
 693                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 694                      port++) {
 695                         struct octeon_ethernet *priv;
 696                         struct net_device *dev =
 697                             alloc_etherdev(sizeof(struct octeon_ethernet));
 698                         if (!dev) {
 699                                 pr_err("Failed to allocate ethernet device for port %d\n", port);
 700                                 continue;
 701                         }
 702
 703                         /* Initialize the device private structure. */
 704                         priv = netdev_priv(dev);
 705
 706                         INIT_DELAYED_WORK(&priv->port_periodic_work,
 707                                           cvm_oct_periodic_worker);
 708                         priv->imode = imode;
 709                         priv->port = port;
 710                         priv->queue = cvmx_pko_get_base_queue(priv->port);
 711                         priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
 712                         for (qos = 0; qos < 16; qos++)
 713                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 714                         for (qos = 0; qos < cvmx_pko_get_num_queues(port);
 715                              qos++)
 716                                 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
 717
 718                         switch (priv->imode) {
 719
 720                         /* These types don't support ports to IPD/PKO */
 721                         case CVMX_HELPER_INTERFACE_MODE_DISABLED:
 722                         case CVMX_HELPER_INTERFACE_MODE_PCIE:
 723                         case CVMX_HELPER_INTERFACE_MODE_PICMG:
 724                                 break;
 725
 726                         case CVMX_HELPER_INTERFACE_MODE_NPI:
 727                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 728                                 strcpy(dev->name, "npi%d");
 729                                 break;
 730
 731                         case CVMX_HELPER_INTERFACE_MODE_XAUI:
 732                                 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
 733                                 strcpy(dev->name, "xaui%d");
 734                                 break;
 735
 736                         case CVMX_HELPER_INTERFACE_MODE_LOOP:
 737                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 738                                 strcpy(dev->name, "loop%d");
 739                                 break;
 740
 741                         case CVMX_HELPER_INTERFACE_MODE_SGMII:
 742                                 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
 743                                 strcpy(dev->name, "eth%d");
 744                                 break;
 745
 746                         case CVMX_HELPER_INTERFACE_MODE_SPI:
 747                                 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
 748                                 strcpy(dev->name, "spi%d");
 749                                 break;
 750
 751                         case CVMX_HELPER_INTERFACE_MODE_RGMII:
 752                         case CVMX_HELPER_INTERFACE_MODE_GMII:
 753                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 754                                 strcpy(dev->name, "eth%d");
 755                                 break;
 756                         }
 757
 758                         if (!dev->netdev_ops) {
 759                                 free_netdev(dev);
 760                         } else if (register_netdev(dev) < 0) {
 761                                 pr_err("Failed to register ethernet device "
 762                                          "for interface %d, port %d\n",
 763                                          interface, priv->port);
 764                                 free_netdev(dev);
 765                         } else {
 766                                 cvm_oct_device[priv->port] = dev;
 767                                 fau -=
 768                                     cvmx_pko_get_num_queues(priv->port) *
 769                                     sizeof(uint32_t);
 770                                 queue_delayed_work(cvm_oct_poll_queue,
 771                                                    &priv->port_periodic_work, HZ);
 772                         }
 773                 }
 774         }
 775
 776         cvm_oct_tx_initialize();
 777         cvm_oct_rx_initialize();
 778
 779         /*
 780          * 150 uS: about 10 1500-byte packtes at 1GE.
 781          */
 782         cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
 783
 784         queue_delayed_work(cvm_oct_poll_queue, &cvm_oct_rx_refill_work, HZ);
 785
 786         return 0;
 787 }
 788
 789 static void __exit cvm_oct_cleanup_module(void)
 790 {
 791         int port;
 792
 793         /* Disable POW interrupt */
 794         cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), 0);
 795
 796         cvmx_ipd_disable();
 797
 798         /* Free the interrupt handler */
 799         free_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, cvm_oct_device);
 800
 801         atomic_inc_return(&cvm_oct_poll_queue_stopping);
 802         cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
 803
 804         cvm_oct_rx_shutdown();
 805         cvm_oct_tx_shutdown();
 806
 807         cvmx_pko_disable();
 808
 809         /* Free the ethernet devices */
 810         for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
 811                 if (cvm_oct_device[port]) {
 812                         struct net_device *dev = cvm_oct_device[port];
 813                         struct octeon_ethernet *priv = netdev_priv(dev);
 814                         cancel_delayed_work_sync(&priv->port_periodic_work);
 815
 816                         cvm_oct_tx_shutdown_dev(dev);
 817                         unregister_netdev(dev);
 818                         free_netdev(dev);
 819                         cvm_oct_device[port] = NULL;
 820                 }
 821         }
 822
 823         destroy_workqueue(cvm_oct_poll_queue);
 824
 825         cvmx_pko_shutdown();
 826
 827         cvmx_ipd_free_ptr();
 828
 829         /* Free the HW pools */
 830         cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 831                               num_packet_buffers);
 832         cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 833                               num_packet_buffers);
 834         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 835                 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 836                                       CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
 837 }
 838
 839 MODULE_LICENSE("GPL");
 840 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
 841 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");
 842 module_init(cvm_oct_init_module);
 843 module_exit(cvm_oct_cleanup_module);