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  * cvm_oct_poll_queue - Workqueue for polling operations.
  91  */
  92 struct workqueue_struct *cvm_oct_poll_queue;
  93
  94 /**
  95  * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
  96  *
  97  * Set to one right before cvm_oct_poll_queue is destroyed.
  98  */
  99 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
 100
 101 /**
 102  * Array of every ethernet device owned by this driver indexed by
 103  * the ipd input port number.
 104  */
 105 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
 106
 107 u64 cvm_oct_tx_poll_interval;
 108
 109 static void cvm_oct_rx_refill_worker(struct work_struct *work);
 110 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
 111
 112 static void cvm_oct_rx_refill_worker(struct work_struct *work)
 113 {
 114         /*
 115          * FPA 0 may have been drained, try to refill it if we need
 116          * more than num_packet_buffers / 2, otherwise normal receive
 117          * processing will refill it.  If it were drained, no packets
 118          * could be received so cvm_oct_napi_poll would never be
 119          * invoked to do the refill.
 120          */
 121         cvm_oct_rx_refill_pool(num_packet_buffers / 2);
 122
 123         if (!atomic_read(&cvm_oct_poll_queue_stopping))
 124                 queue_delayed_work(cvm_oct_poll_queue,
 125                                    &cvm_oct_rx_refill_work, HZ);
 126 }
 127
 128 static void cvm_oct_periodic_worker(struct work_struct *work)
 129 {
 130         struct octeon_ethernet *priv = container_of(work,
 131                                                     struct octeon_ethernet,
 132                                                     port_periodic_work.work);
 133
 134         if (priv->poll)
 135                 priv->poll(cvm_oct_device[priv->port]);
 136
 137         cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats(
 138                                                 cvm_oct_device[priv->port]);
 139
 140         if (!atomic_read(&cvm_oct_poll_queue_stopping))
 141                 queue_delayed_work(cvm_oct_poll_queue,
 142                                                 &priv->port_periodic_work, HZ);
 143 }
 144
 145 static void cvm_oct_configure_common_hw(void)
 146 {
 147         /* Setup the FPA */
 148         cvmx_fpa_enable();
 149         cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 150                              num_packet_buffers);
 151         cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 152                              num_packet_buffers);
 153         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 154                 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 155                                      CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 1024);
 156
 157 #ifdef __LITTLE_ENDIAN
 158         {
 159                 union cvmx_ipd_ctl_status ipd_ctl_status;
 160
 161                 ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 162                 ipd_ctl_status.s.pkt_lend = 1;
 163                 ipd_ctl_status.s.wqe_lend = 1;
 164                 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
 165         }
 166 #endif
 167
 168         cvmx_helper_setup_red(num_packet_buffers / 4, num_packet_buffers / 8);
 169 }
 170
 171 /**
 172  * cvm_oct_free_work- Free a work queue entry
 173  *
 174  * @work_queue_entry: Work queue entry to free
 175  *
 176  * Returns Zero on success, Negative on failure.
 177  */
 178 int cvm_oct_free_work(void *work_queue_entry)
 179 {
 180         cvmx_wqe_t *work = work_queue_entry;
 181
 182         int segments = work->word2.s.bufs;
 183         union cvmx_buf_ptr segment_ptr = work->packet_ptr;
 184
 185         while (segments--) {
 186                 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
 187                         cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
 188                 if (unlikely(!segment_ptr.s.i))
 189                         cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
 190                                       segment_ptr.s.pool,
 191                                       CVMX_FPA_PACKET_POOL_SIZE / 128);
 192                 segment_ptr = next_ptr;
 193         }
 194         cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, 1);
 195
 196         return 0;
 197 }
 198 EXPORT_SYMBOL(cvm_oct_free_work);
 199
 200 /**
 201  * cvm_oct_common_get_stats - get the low level ethernet statistics
 202  * @dev:    Device to get the statistics from
 203  *
 204  * Returns Pointer to the statistics
 205  */
 206 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
 207 {
 208         cvmx_pip_port_status_t rx_status;
 209         cvmx_pko_port_status_t tx_status;
 210         struct octeon_ethernet *priv = netdev_priv(dev);
 211
 212         if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
 213                 if (octeon_is_simulation()) {
 214                         /* The simulator doesn't support statistics */
 215                         memset(&rx_status, 0, sizeof(rx_status));
 216                         memset(&tx_status, 0, sizeof(tx_status));
 217                 } else {
 218                         cvmx_pip_get_port_status(priv->port, 1, &rx_status);
 219                         cvmx_pko_get_port_status(priv->port, 1, &tx_status);
 220                 }
 221
 222                 priv->stats.rx_packets += rx_status.inb_packets;
 223                 priv->stats.tx_packets += tx_status.packets;
 224                 priv->stats.rx_bytes += rx_status.inb_octets;
 225                 priv->stats.tx_bytes += tx_status.octets;
 226                 priv->stats.multicast += rx_status.multicast_packets;
 227                 priv->stats.rx_crc_errors += rx_status.inb_errors;
 228                 priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
 229
 230                 /*
 231                  * The drop counter must be incremented atomically
 232                  * since the RX tasklet also increments it.
 233                  */
 234 #ifdef CONFIG_64BIT
 235                 atomic64_add(rx_status.dropped_packets,
 236                              (atomic64_t *)&priv->stats.rx_dropped);
 237 #else
 238                 atomic_add(rx_status.dropped_packets,
 239                              (atomic_t *)&priv->stats.rx_dropped);
 240 #endif
 241         }
 242
 243         return &priv->stats;
 244 }
 245
 246 /**
 247  * cvm_oct_common_change_mtu - change the link MTU
 248  * @dev:     Device to change
 249  * @new_mtu: The new MTU
 250  *
 251  * Returns Zero on success
 252  */
 253 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
 254 {
 255         struct octeon_ethernet *priv = netdev_priv(dev);
 256         int interface = INTERFACE(priv->port);
 257         int index = INDEX(priv->port);
 258 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
 259         int vlan_bytes = 4;
 260 #else
 261         int vlan_bytes = 0;
 262 #endif
 263
 264         /*
 265          * Limit the MTU to make sure the ethernet packets are between
 266          * 64 bytes and 65535 bytes.
 267          */
 268         if ((new_mtu + 14 + 4 + vlan_bytes < 64)
 269             || (new_mtu + 14 + 4 + vlan_bytes > 65392)) {
 270                 pr_err("MTU must be between %d and %d.\n",
 271                        64 - 14 - 4 - vlan_bytes, 65392 - 14 - 4 - vlan_bytes);
 272                 return -EINVAL;
 273         }
 274         dev->mtu = new_mtu;
 275
 276         if ((interface < 2)
 277             && (cvmx_helper_interface_get_mode(interface) !=
 278                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 279                 /* Add ethernet header and FCS, and VLAN if configured. */
 280                 int max_packet = new_mtu + 14 + 4 + vlan_bytes;
 281
 282                 if (OCTEON_IS_MODEL(OCTEON_CN3XXX)
 283                     || OCTEON_IS_MODEL(OCTEON_CN58XX)) {
 284                         /* Signal errors on packets larger than the MTU */
 285                         cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
 286                                        max_packet);
 287                 } else {
 288                         /*
 289                          * Set the hardware to truncate packets larger
 290                          * than the MTU and smaller the 64 bytes.
 291                          */
 292                         union cvmx_pip_frm_len_chkx frm_len_chk;
 293
 294                         frm_len_chk.u64 = 0;
 295                         frm_len_chk.s.minlen = 64;
 296                         frm_len_chk.s.maxlen = max_packet;
 297                         cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
 298                                        frm_len_chk.u64);
 299                 }
 300                 /*
 301                  * Set the hardware to truncate packets larger than
 302                  * the MTU. The jabber register must be set to a
 303                  * multiple of 8 bytes, so round up.
 304                  */
 305                 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
 306                                (max_packet + 7) & ~7u);
 307         }
 308         return 0;
 309 }
 310
 311 /**
 312  * cvm_oct_common_set_multicast_list - set the multicast list
 313  * @dev:    Device to work on
 314  */
 315 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
 316 {
 317         union cvmx_gmxx_prtx_cfg gmx_cfg;
 318         struct octeon_ethernet *priv = netdev_priv(dev);
 319         int interface = INTERFACE(priv->port);
 320         int index = INDEX(priv->port);
 321
 322         if ((interface < 2)
 323             && (cvmx_helper_interface_get_mode(interface) !=
 324                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 325                 union cvmx_gmxx_rxx_adr_ctl control;
 326
 327                 control.u64 = 0;
 328                 control.s.bcst = 1;     /* Allow broadcast MAC addresses */
 329
 330                 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
 331                     (dev->flags & IFF_PROMISC))
 332                         /* Force accept multicast packets */
 333                         control.s.mcst = 2;
 334                 else
 335                         /* Force reject multicast packets */
 336                         control.s.mcst = 1;
 337
 338                 if (dev->flags & IFF_PROMISC)
 339                         /*
 340                          * Reject matches if promisc. Since CAM is
 341                          * shut off, should accept everything.
 342                          */
 343                         control.s.cam_mode = 0;
 344                 else
 345                         /* Filter packets based on the CAM */
 346                         control.s.cam_mode = 1;
 347
 348                 gmx_cfg.u64 =
 349                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 350                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 351                                gmx_cfg.u64 & ~1ull);
 352
 353                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
 354                                control.u64);
 355                 if (dev->flags & IFF_PROMISC)
 356                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 357                                        (index, interface), 0);
 358                 else
 359                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 360                                        (index, interface), 1);
 361
 362                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 363                                gmx_cfg.u64);
 364         }
 365 }
 366
 367 /**
 368  * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
 369  * @dev:    The device in question.
 370  * @addr:   Address structure to change it too.
 371
 372  * Returns Zero on success
 373  */
 374 static int cvm_oct_set_mac_filter(struct net_device *dev)
 375 {
 376         struct octeon_ethernet *priv = netdev_priv(dev);
 377         union cvmx_gmxx_prtx_cfg gmx_cfg;
 378         int interface = INTERFACE(priv->port);
 379         int index = INDEX(priv->port);
 380
 381         if ((interface < 2)
 382             && (cvmx_helper_interface_get_mode(interface) !=
 383                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 384                 int i;
 385                 uint8_t *ptr = dev->dev_addr;
 386                 uint64_t mac = 0;
 387
 388                 for (i = 0; i < 6; i++)
 389                         mac = (mac << 8) | (uint64_t)ptr[i];
 390
 391                 gmx_cfg.u64 =
 392                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 393                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 394                                gmx_cfg.u64 & ~1ull);
 395
 396                 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
 397                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
 398                                ptr[0]);
 399                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
 400                                ptr[1]);
 401                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
 402                                ptr[2]);
 403                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
 404                                ptr[3]);
 405                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
 406                                ptr[4]);
 407                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
 408                                ptr[5]);
 409                 cvm_oct_common_set_multicast_list(dev);
 410                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 411                                gmx_cfg.u64);
 412         }
 413         return 0;
 414 }
 415
 416 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
 417 {
 418         int r = eth_mac_addr(dev, addr);
 419
 420         if (r)
 421                 return r;
 422         return cvm_oct_set_mac_filter(dev);
 423 }
 424
 425 /**
 426  * cvm_oct_common_init - per network device initialization
 427  * @dev:    Device to initialize
 428  *
 429  * Returns Zero on success
 430  */
 431 int cvm_oct_common_init(struct net_device *dev)
 432 {
 433         struct octeon_ethernet *priv = netdev_priv(dev);
 434         const u8 *mac = NULL;
 435
 436         if (priv->of_node)
 437                 mac = of_get_mac_address(priv->of_node);
 438
 439         if (mac)
 440                 ether_addr_copy(dev->dev_addr, mac);
 441         else
 442                 eth_hw_addr_random(dev);
 443
 444         /*
 445          * Force the interface to use the POW send if always_use_pow
 446          * was specified or it is in the pow send list.
 447          */
 448         if ((pow_send_group != -1)
 449             && (always_use_pow || strstr(pow_send_list, dev->name)))
 450                 priv->queue = -1;
 451
 452         if (priv->queue != -1)
 453                 dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
 454
 455         /* We do our own locking, Linux doesn't need to */
 456         dev->features |= NETIF_F_LLTX;
 457         dev->ethtool_ops = &cvm_oct_ethtool_ops;
 458
 459         cvm_oct_set_mac_filter(dev);
 460         dev->netdev_ops->ndo_change_mtu(dev, dev->mtu);
 461
 462         /*
 463          * Zero out stats for port so we won't mistakenly show
 464          * counters from the bootloader.
 465          */
 466         memset(dev->netdev_ops->ndo_get_stats(dev), 0,
 467                sizeof(struct net_device_stats));
 468
 469         if (dev->netdev_ops->ndo_stop)
 470                 dev->netdev_ops->ndo_stop(dev);
 471
 472         return 0;
 473 }
 474
 475 void cvm_oct_common_uninit(struct net_device *dev)
 476 {
 477         struct octeon_ethernet *priv = netdev_priv(dev);
 478
 479         if (priv->phydev)
 480                 phy_disconnect(priv->phydev);
 481 }
 482
 483 int cvm_oct_common_open(struct net_device *dev,
 484                         void (*link_poll)(struct net_device *), bool poll_now)
 485 {
 486         union cvmx_gmxx_prtx_cfg gmx_cfg;
 487         struct octeon_ethernet *priv = netdev_priv(dev);
 488         int interface = INTERFACE(priv->port);
 489         int index = INDEX(priv->port);
 490         cvmx_helper_link_info_t link_info;
 491         int rv;
 492
 493         rv = cvm_oct_phy_setup_device(dev);
 494         if (rv)
 495                 return rv;
 496
 497         gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 498         gmx_cfg.s.en = 1;
 499         cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
 500
 501         if (octeon_is_simulation())
 502                 return 0;
 503
 504         if (priv->phydev) {
 505                 int r = phy_read_status(priv->phydev);
 506
 507                 if (r == 0 && priv->phydev->link == 0)
 508                         netif_carrier_off(dev);
 509                 cvm_oct_adjust_link(dev);
 510         } else {
 511                 link_info = cvmx_helper_link_get(priv->port);
 512                 if (!link_info.s.link_up)
 513                         netif_carrier_off(dev);
 514                 priv->poll = link_poll;
 515                 if (poll_now)
 516                         link_poll(dev);
 517         }
 518
 519         return 0;
 520 }
 521
 522 void cvm_oct_link_poll(struct net_device *dev)
 523 {
 524         struct octeon_ethernet *priv = netdev_priv(dev);
 525         cvmx_helper_link_info_t link_info;
 526
 527         link_info = cvmx_helper_link_get(priv->port);
 528         if (link_info.u64 == priv->link_info)
 529                 return;
 530
 531         link_info = cvmx_helper_link_autoconf(priv->port);
 532         priv->link_info = link_info.u64;
 533
 534         if (link_info.s.link_up) {
 535                 if (!netif_carrier_ok(dev))
 536                         netif_carrier_on(dev);
 537         } else if (netif_carrier_ok(dev)) {
 538                 netif_carrier_off(dev);
 539         }
 540         cvm_oct_note_carrier(priv, link_info);
 541 }
 542
 543 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
 544         .ndo_init               = cvm_oct_common_init,
 545         .ndo_uninit             = cvm_oct_common_uninit,
 546         .ndo_start_xmit         = cvm_oct_xmit,
 547         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 548         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 549         .ndo_do_ioctl           = cvm_oct_ioctl,
 550         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 551         .ndo_get_stats          = cvm_oct_common_get_stats,
 552 #ifdef CONFIG_NET_POLL_CONTROLLER
 553         .ndo_poll_controller    = cvm_oct_poll_controller,
 554 #endif
 555 };
 556 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
 557         .ndo_init               = cvm_oct_xaui_init,
 558         .ndo_uninit             = cvm_oct_common_uninit,
 559         .ndo_open               = cvm_oct_xaui_open,
 560         .ndo_stop               = cvm_oct_common_stop,
 561         .ndo_start_xmit         = cvm_oct_xmit,
 562         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 563         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 564         .ndo_do_ioctl           = cvm_oct_ioctl,
 565         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 566         .ndo_get_stats          = cvm_oct_common_get_stats,
 567 #ifdef CONFIG_NET_POLL_CONTROLLER
 568         .ndo_poll_controller    = cvm_oct_poll_controller,
 569 #endif
 570 };
 571 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
 572         .ndo_init               = cvm_oct_sgmii_init,
 573         .ndo_uninit             = cvm_oct_common_uninit,
 574         .ndo_open               = cvm_oct_sgmii_open,
 575         .ndo_stop               = cvm_oct_common_stop,
 576         .ndo_start_xmit         = cvm_oct_xmit,
 577         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 578         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 579         .ndo_do_ioctl           = cvm_oct_ioctl,
 580         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 581         .ndo_get_stats          = cvm_oct_common_get_stats,
 582 #ifdef CONFIG_NET_POLL_CONTROLLER
 583         .ndo_poll_controller    = cvm_oct_poll_controller,
 584 #endif
 585 };
 586 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
 587         .ndo_init               = cvm_oct_spi_init,
 588         .ndo_uninit             = cvm_oct_spi_uninit,
 589         .ndo_start_xmit         = cvm_oct_xmit,
 590         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 591         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 592         .ndo_do_ioctl           = cvm_oct_ioctl,
 593         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 594         .ndo_get_stats          = cvm_oct_common_get_stats,
 595 #ifdef CONFIG_NET_POLL_CONTROLLER
 596         .ndo_poll_controller    = cvm_oct_poll_controller,
 597 #endif
 598 };
 599 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
 600         .ndo_init               = cvm_oct_rgmii_init,
 601         .ndo_uninit             = cvm_oct_rgmii_uninit,
 602         .ndo_open               = cvm_oct_rgmii_open,
 603         .ndo_stop               = cvm_oct_common_stop,
 604         .ndo_start_xmit         = cvm_oct_xmit,
 605         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 606         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 607         .ndo_do_ioctl           = cvm_oct_ioctl,
 608         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 609         .ndo_get_stats          = cvm_oct_common_get_stats,
 610 #ifdef CONFIG_NET_POLL_CONTROLLER
 611         .ndo_poll_controller    = cvm_oct_poll_controller,
 612 #endif
 613 };
 614 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
 615         .ndo_init               = cvm_oct_common_init,
 616         .ndo_start_xmit         = cvm_oct_xmit_pow,
 617         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 618         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 619         .ndo_do_ioctl           = cvm_oct_ioctl,
 620         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 621         .ndo_get_stats          = cvm_oct_common_get_stats,
 622 #ifdef CONFIG_NET_POLL_CONTROLLER
 623         .ndo_poll_controller    = cvm_oct_poll_controller,
 624 #endif
 625 };
 626
 627 static struct device_node *cvm_oct_of_get_child(
 628                                 const struct device_node *parent, int reg_val)
 629 {
 630         struct device_node *node = NULL;
 631         int size;
 632         const __be32 *addr;
 633
 634         for (;;) {
 635                 node = of_get_next_child(parent, node);
 636                 if (!node)
 637                         break;
 638                 addr = of_get_property(node, "reg", &size);
 639                 if (addr && (be32_to_cpu(*addr) == reg_val))
 640                         break;
 641         }
 642         return node;
 643 }
 644
 645 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
 646                                                         int interface, int port)
 647 {
 648         struct device_node *ni, *np;
 649
 650         ni = cvm_oct_of_get_child(pip, interface);
 651         if (!ni)
 652                 return NULL;
 653
 654         np = cvm_oct_of_get_child(ni, port);
 655         of_node_put(ni);
 656
 657         return np;
 658 }
 659
 660 static int cvm_oct_probe(struct platform_device *pdev)
 661 {
 662         int num_interfaces;
 663         int interface;
 664         int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
 665         int qos;
 666         struct device_node *pip;
 667
 668         octeon_mdiobus_force_mod_depencency();
 669
 670         pip = pdev->dev.of_node;
 671         if (!pip) {
 672                 pr_err("Error: No 'pip' in /aliases\n");
 673                 return -EINVAL;
 674         }
 675
 676         cvm_oct_poll_queue = create_singlethread_workqueue("octeon-ethernet");
 677         if (cvm_oct_poll_queue == NULL) {
 678                 pr_err("octeon-ethernet: Cannot create workqueue");
 679                 return -ENOMEM;
 680         }
 681
 682         cvm_oct_configure_common_hw();
 683
 684         cvmx_helper_initialize_packet_io_global();
 685
 686         /* Change the input group for all ports before input is enabled */
 687         num_interfaces = cvmx_helper_get_number_of_interfaces();
 688         for (interface = 0; interface < num_interfaces; 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                         union cvmx_pip_prt_tagx pip_prt_tagx;
 696
 697                         pip_prt_tagx.u64 =
 698                             cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
 699                         pip_prt_tagx.s.grp = pow_receive_group;
 700                         cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
 701                                        pip_prt_tagx.u64);
 702                 }
 703         }
 704
 705         cvmx_helper_ipd_and_packet_input_enable();
 706
 707         memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
 708
 709         /*
 710          * Initialize the FAU used for counting packet buffers that
 711          * need to be freed.
 712          */
 713         cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
 714
 715         /* Initialize the FAU used for counting tx SKBs that need to be freed */
 716         cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
 717
 718         if ((pow_send_group != -1)) {
 719                 struct net_device *dev;
 720
 721                 pr_info("\tConfiguring device for POW only access\n");
 722                 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
 723                 if (dev) {
 724                         /* Initialize the device private structure. */
 725                         struct octeon_ethernet *priv = netdev_priv(dev);
 726
 727                         dev->netdev_ops = &cvm_oct_pow_netdev_ops;
 728                         priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
 729                         priv->port = CVMX_PIP_NUM_INPUT_PORTS;
 730                         priv->queue = -1;
 731                         strcpy(dev->name, "pow%d");
 732                         for (qos = 0; qos < 16; qos++)
 733                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 734
 735                         if (register_netdev(dev) < 0) {
 736                                 pr_err("Failed to register ethernet device for POW\n");
 737                                 free_netdev(dev);
 738                         } else {
 739                                 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
 740                                 pr_info("%s: POW send group %d, receive group %d\n",
 741                                         dev->name, pow_send_group,
 742                                         pow_receive_group);
 743                         }
 744                 } else {
 745                         pr_err("Failed to allocate ethernet device for POW\n");
 746                 }
 747         }
 748
 749         num_interfaces = cvmx_helper_get_number_of_interfaces();
 750         for (interface = 0; interface < num_interfaces; interface++) {
 751                 cvmx_helper_interface_mode_t imode =
 752                     cvmx_helper_interface_get_mode(interface);
 753                 int num_ports = cvmx_helper_ports_on_interface(interface);
 754                 int port;
 755                 int port_index;
 756
 757                 for (port_index = 0,
 758                      port = cvmx_helper_get_ipd_port(interface, 0);
 759                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 760                      port_index++, port++) {
 761                         struct octeon_ethernet *priv;
 762                         struct net_device *dev =
 763                             alloc_etherdev(sizeof(struct octeon_ethernet));
 764                         if (!dev) {
 765                                 pr_err("Failed to allocate ethernet device for port %d\n",
 766                                        port);
 767                                 continue;
 768                         }
 769
 770                         /* Initialize the device private structure. */
 771                         priv = netdev_priv(dev);
 772                         priv->netdev = dev;
 773                         priv->of_node = cvm_oct_node_for_port(pip, interface,
 774                                                                 port_index);
 775
 776                         INIT_DELAYED_WORK(&priv->port_periodic_work,
 777                                           cvm_oct_periodic_worker);
 778                         priv->imode = imode;
 779                         priv->port = port;
 780                         priv->queue = cvmx_pko_get_base_queue(priv->port);
 781                         priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
 782                         for (qos = 0; qos < 16; qos++)
 783                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 784                         for (qos = 0; qos < cvmx_pko_get_num_queues(port);
 785                              qos++)
 786                                 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
 787
 788                         switch (priv->imode) {
 789
 790                         /* These types don't support ports to IPD/PKO */
 791                         case CVMX_HELPER_INTERFACE_MODE_DISABLED:
 792                         case CVMX_HELPER_INTERFACE_MODE_PCIE:
 793                         case CVMX_HELPER_INTERFACE_MODE_PICMG:
 794                                 break;
 795
 796                         case CVMX_HELPER_INTERFACE_MODE_NPI:
 797                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 798                                 strcpy(dev->name, "npi%d");
 799                                 break;
 800
 801                         case CVMX_HELPER_INTERFACE_MODE_XAUI:
 802                                 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
 803                                 strcpy(dev->name, "xaui%d");
 804                                 break;
 805
 806                         case CVMX_HELPER_INTERFACE_MODE_LOOP:
 807                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 808                                 strcpy(dev->name, "loop%d");
 809                                 break;
 810
 811                         case CVMX_HELPER_INTERFACE_MODE_SGMII:
 812                                 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
 813                                 strcpy(dev->name, "eth%d");
 814                                 break;
 815
 816                         case CVMX_HELPER_INTERFACE_MODE_SPI:
 817                                 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
 818                                 strcpy(dev->name, "spi%d");
 819                                 break;
 820
 821                         case CVMX_HELPER_INTERFACE_MODE_RGMII:
 822                         case CVMX_HELPER_INTERFACE_MODE_GMII:
 823                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 824                                 strcpy(dev->name, "eth%d");
 825                                 break;
 826                         }
 827
 828                         if (!dev->netdev_ops) {
 829                                 free_netdev(dev);
 830                         } else if (register_netdev(dev) < 0) {
 831                                 pr_err("Failed to register ethernet device for interface %d, port %d\n",
 832                                          interface, priv->port);
 833                                 free_netdev(dev);
 834                         } else {
 835                                 cvm_oct_device[priv->port] = dev;
 836                                 fau -=
 837                                     cvmx_pko_get_num_queues(priv->port) *
 838                                     sizeof(uint32_t);
 839                                 queue_delayed_work(cvm_oct_poll_queue,
 840                                                 &priv->port_periodic_work, HZ);
 841                         }
 842                 }
 843         }
 844
 845         cvm_oct_tx_initialize();
 846         cvm_oct_rx_initialize();
 847
 848         /*
 849          * 150 uS: about 10 1500-byte packets at 1GE.
 850          */
 851         cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
 852
 853         queue_delayed_work(cvm_oct_poll_queue, &cvm_oct_rx_refill_work, HZ);
 854
 855         return 0;
 856 }
 857
 858 static int cvm_oct_remove(struct platform_device *pdev)
 859 {
 860         int port;
 861
 862         /* Disable POW interrupt */
 863         if (OCTEON_IS_MODEL(OCTEON_CN68XX))
 864                 cvmx_write_csr(CVMX_SSO_WQ_INT_THRX(pow_receive_group), 0);
 865         else
 866                 cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), 0);
 867
 868         cvmx_ipd_disable();
 869
 870         /* Free the interrupt handler */
 871         free_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, cvm_oct_device);
 872
 873         atomic_inc_return(&cvm_oct_poll_queue_stopping);
 874         cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
 875
 876         cvm_oct_rx_shutdown();
 877         cvm_oct_tx_shutdown();
 878
 879         cvmx_pko_disable();
 880
 881         /* Free the ethernet devices */
 882         for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
 883                 if (cvm_oct_device[port]) {
 884                         struct net_device *dev = cvm_oct_device[port];
 885                         struct octeon_ethernet *priv = netdev_priv(dev);
 886
 887                         cancel_delayed_work_sync(&priv->port_periodic_work);
 888
 889                         cvm_oct_tx_shutdown_dev(dev);
 890                         unregister_netdev(dev);
 891                         free_netdev(dev);
 892                         cvm_oct_device[port] = NULL;
 893                 }
 894         }
 895
 896         destroy_workqueue(cvm_oct_poll_queue);
 897
 898         cvmx_pko_shutdown();
 899
 900         cvmx_ipd_free_ptr();
 901
 902         /* Free the HW pools */
 903         cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 904                               num_packet_buffers);
 905         cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 906                               num_packet_buffers);
 907         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 908                 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 909                                       CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
 910         return 0;
 911 }
 912
 913 static const struct of_device_id cvm_oct_match[] = {
 914         {
 915                 .compatible = "cavium,octeon-3860-pip",
 916         },
 917         {},
 918 };
 919 MODULE_DEVICE_TABLE(of, cvm_oct_match);
 920
 921 static struct platform_driver cvm_oct_driver = {
 922         .probe          = cvm_oct_probe,
 923         .remove         = cvm_oct_remove,
 924         .driver         = {
 925                 .name   = KBUILD_MODNAME,
 926                 .of_match_table = cvm_oct_match,
 927         },
 928 };
 929
 930 module_platform_driver(cvm_oct_driver);
 931
 932 MODULE_LICENSE("GPL");
 933 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
 934 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");