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 #include <linux/if_ether.h>
  21 #include <linux/if_vlan.h>
  22
  23 #include <net/dst.h>
  24
  25 #include <asm/octeon/octeon.h>
  26
  27 #include "ethernet-defines.h"
  28 #include "octeon-ethernet.h"
  29 #include "ethernet-mem.h"
  30 #include "ethernet-rx.h"
  31 #include "ethernet-tx.h"
  32 #include "ethernet-mdio.h"
  33 #include "ethernet-util.h"
  34
  35 #include <asm/octeon/cvmx-pip.h>
  36 #include <asm/octeon/cvmx-pko.h>
  37 #include <asm/octeon/cvmx-fau.h>
  38 #include <asm/octeon/cvmx-ipd.h>
  39 #include <asm/octeon/cvmx-helper.h>
  40 #include <asm/octeon/cvmx-asxx-defs.h>
  41 #include <asm/octeon/cvmx-gmxx-defs.h>
  42 #include <asm/octeon/cvmx-smix-defs.h>
  43
  44 #define OCTEON_MAX_MTU 65392
  45
  46 static int num_packet_buffers = 1024;
  47 module_param(num_packet_buffers, int, 0444);
  48 MODULE_PARM_DESC(num_packet_buffers, "\n"
  49         "\tNumber of packet buffers to allocate and store in the\n"
  50         "\tFPA. By default, 1024 packet buffers are used.\n");
  51
  52 static int pow_receive_group = 15;
  53 module_param(pow_receive_group, int, 0444);
  54 MODULE_PARM_DESC(pow_receive_group, "\n"
  55         "\tPOW group to receive packets from. All ethernet hardware\n"
  56         "\twill be configured to send incoming packets to this POW\n"
  57         "\tgroup. Also any other software can submit packets to this\n"
  58         "\tgroup for the kernel to process.");
  59
  60 static int receive_group_order;
  61 module_param(receive_group_order, int, 0444);
  62 MODULE_PARM_DESC(receive_group_order, "\n"
  63         "\tOrder (0..4) of receive groups to take into use. Ethernet hardware\n"
  64         "\twill be configured to send incoming packets to multiple POW\n"
  65         "\tgroups. pow_receive_group parameter is ignored when multiple\n"
  66         "\tgroups are taken into use and groups are allocated starting\n"
  67         "\tfrom 0. By default, a single group is used.\n");
  68
  69 int pow_send_group = -1;
  70 module_param(pow_send_group, int, 0644);
  71 MODULE_PARM_DESC(pow_send_group, "\n"
  72         "\tPOW group to send packets to other software on. This\n"
  73         "\tcontrols the creation of the virtual device pow0.\n"
  74         "\talways_use_pow also depends on this value.");
  75
  76 int always_use_pow;
  77 module_param(always_use_pow, int, 0444);
  78 MODULE_PARM_DESC(always_use_pow, "\n"
  79         "\tWhen set, always send to the pow group. This will cause\n"
  80         "\tpackets sent to real ethernet devices to be sent to the\n"
  81         "\tPOW group instead of the hardware. Unless some other\n"
  82         "\tapplication changes the config, packets will still be\n"
  83         "\treceived from the low level hardware. Use this option\n"
  84         "\tto allow a CVMX app to intercept all packets from the\n"
  85         "\tlinux kernel. You must specify pow_send_group along with\n"
  86         "\tthis option.");
  87
  88 char pow_send_list[128] = "";
  89 module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444);
  90 MODULE_PARM_DESC(pow_send_list, "\n"
  91         "\tComma separated list of ethernet devices that should use the\n"
  92         "\tPOW for transmit instead of the actual ethernet hardware. This\n"
  93         "\tis a per port version of always_use_pow. always_use_pow takes\n"
  94         "\tprecedence over this list. For example, setting this to\n"
  95         "\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n"
  96         "\tusing the pow_send_group.");
  97
  98 int rx_napi_weight = 32;
  99 module_param(rx_napi_weight, int, 0444);
 100 MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter.");
 101
 102 /* Mask indicating which receive groups are in use. */
 103 int pow_receive_groups;
 104
 105 /*
 106  * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
 107  *
 108  * Set to one right before cvm_oct_poll_queue is destroyed.
 109  */
 110 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
 111
 112 /*
 113  * Array of every ethernet device owned by this driver indexed by
 114  * the ipd input port number.
 115  */
 116 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
 117
 118 u64 cvm_oct_tx_poll_interval;
 119
 120 static void cvm_oct_rx_refill_worker(struct work_struct *work);
 121 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
 122
 123 static void cvm_oct_rx_refill_worker(struct work_struct *work)
 124 {
 125         /*
 126          * FPA 0 may have been drained, try to refill it if we need
 127          * more than num_packet_buffers / 2, otherwise normal receive
 128          * processing will refill it.  If it were drained, no packets
 129          * could be received so cvm_oct_napi_poll would never be
 130          * invoked to do the refill.
 131          */
 132         cvm_oct_rx_refill_pool(num_packet_buffers / 2);
 133
 134         if (!atomic_read(&cvm_oct_poll_queue_stopping))
 135                 schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 136 }
 137
 138 static void cvm_oct_periodic_worker(struct work_struct *work)
 139 {
 140         struct octeon_ethernet *priv = container_of(work,
 141                                                     struct octeon_ethernet,
 142                                                     port_periodic_work.work);
 143
 144         if (priv->poll)
 145                 priv->poll(cvm_oct_device[priv->port]);
 146
 147         cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats(
 148                                                 cvm_oct_device[priv->port]);
 149
 150         if (!atomic_read(&cvm_oct_poll_queue_stopping))
 151                 schedule_delayed_work(&priv->port_periodic_work, HZ);
 152 }
 153
 154 static void cvm_oct_configure_common_hw(void)
 155 {
 156         /* Setup the FPA */
 157         cvmx_fpa_enable();
 158         cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 159                              num_packet_buffers);
 160         cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 161                              num_packet_buffers);
 162         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 163                 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 164                                      CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 1024);
 165
 166 #ifdef __LITTLE_ENDIAN
 167         {
 168                 union cvmx_ipd_ctl_status ipd_ctl_status;
 169
 170                 ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 171                 ipd_ctl_status.s.pkt_lend = 1;
 172                 ipd_ctl_status.s.wqe_lend = 1;
 173                 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
 174         }
 175 #endif
 176
 177         cvmx_helper_setup_red(num_packet_buffers / 4, num_packet_buffers / 8);
 178 }
 179
 180 /**
 181  * cvm_oct_free_work- Free a work queue entry
 182  *
 183  * @work_queue_entry: Work queue entry to free
 184  *
 185  * Returns Zero on success, Negative on failure.
 186  */
 187 int cvm_oct_free_work(void *work_queue_entry)
 188 {
 189         cvmx_wqe_t *work = work_queue_entry;
 190
 191         int segments = work->word2.s.bufs;
 192         union cvmx_buf_ptr segment_ptr = work->packet_ptr;
 193
 194         while (segments--) {
 195                 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
 196                         cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
 197                 if (unlikely(!segment_ptr.s.i))
 198                         cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
 199                                       segment_ptr.s.pool,
 200                                       CVMX_FPA_PACKET_POOL_SIZE / 128);
 201                 segment_ptr = next_ptr;
 202         }
 203         cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, 1);
 204
 205         return 0;
 206 }
 207 EXPORT_SYMBOL(cvm_oct_free_work);
 208
 209 /**
 210  * cvm_oct_common_get_stats - get the low level ethernet statistics
 211  * @dev:    Device to get the statistics from
 212  *
 213  * Returns Pointer to the statistics
 214  */
 215 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
 216 {
 217         cvmx_pip_port_status_t rx_status;
 218         cvmx_pko_port_status_t tx_status;
 219         struct octeon_ethernet *priv = netdev_priv(dev);
 220
 221         if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
 222                 if (octeon_is_simulation()) {
 223                         /* The simulator doesn't support statistics */
 224                         memset(&rx_status, 0, sizeof(rx_status));
 225                         memset(&tx_status, 0, sizeof(tx_status));
 226                 } else {
 227                         cvmx_pip_get_port_status(priv->port, 1, &rx_status);
 228                         cvmx_pko_get_port_status(priv->port, 1, &tx_status);
 229                 }
 230
 231                 priv->stats.rx_packets += rx_status.inb_packets;
 232                 priv->stats.tx_packets += tx_status.packets;
 233                 priv->stats.rx_bytes += rx_status.inb_octets;
 234                 priv->stats.tx_bytes += tx_status.octets;
 235                 priv->stats.multicast += rx_status.multicast_packets;
 236                 priv->stats.rx_crc_errors += rx_status.inb_errors;
 237                 priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
 238                 priv->stats.rx_dropped += rx_status.dropped_packets;
 239         }
 240
 241         return &priv->stats;
 242 }
 243
 244 /**
 245  * cvm_oct_common_change_mtu - change the link MTU
 246  * @dev:     Device to change
 247  * @new_mtu: The new MTU
 248  *
 249  * Returns Zero on success
 250  */
 251 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
 252 {
 253         struct octeon_ethernet *priv = netdev_priv(dev);
 254         int interface = INTERFACE(priv->port);
 255 #if IS_ENABLED(CONFIG_VLAN_8021Q)
 256         int vlan_bytes = VLAN_HLEN;
 257 #else
 258         int vlan_bytes = 0;
 259 #endif
 260         int mtu_overhead = ETH_HLEN + ETH_FCS_LEN + vlan_bytes;
 261
 262         /*
 263          * Limit the MTU to make sure the ethernet packets are between
 264          * 64 bytes and 65535 bytes.
 265          */
 266         if ((new_mtu + mtu_overhead < VLAN_ETH_ZLEN) ||
 267             (new_mtu + mtu_overhead > OCTEON_MAX_MTU)) {
 268                 pr_err("MTU must be between %d and %d.\n",
 269                        VLAN_ETH_ZLEN - mtu_overhead,
 270                        OCTEON_MAX_MTU - mtu_overhead);
 271                 return -EINVAL;
 272         }
 273         dev->mtu = new_mtu;
 274
 275         if ((interface < 2) &&
 276             (cvmx_helper_interface_get_mode(interface) !=
 277                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 278                 int index = INDEX(priv->port);
 279                 /* Add ethernet header and FCS, and VLAN if configured. */
 280                 int max_packet = new_mtu + mtu_overhead;
 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 = VLAN_ETH_ZLEN;
 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
 321         if ((interface < 2) &&
 322             (cvmx_helper_interface_get_mode(interface) !=
 323                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 324                 union cvmx_gmxx_rxx_adr_ctl control;
 325                 int index = INDEX(priv->port);
 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 static int cvm_oct_set_mac_filter(struct net_device *dev)
 368 {
 369         struct octeon_ethernet *priv = netdev_priv(dev);
 370         union cvmx_gmxx_prtx_cfg gmx_cfg;
 371         int interface = INTERFACE(priv->port);
 372
 373         if ((interface < 2) &&
 374             (cvmx_helper_interface_get_mode(interface) !=
 375                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 376                 int i;
 377                 u8 *ptr = dev->dev_addr;
 378                 u64 mac = 0;
 379                 int index = INDEX(priv->port);
 380
 381                 for (i = 0; i < 6; i++)
 382                         mac = (mac << 8) | (u64)ptr[i];
 383
 384                 gmx_cfg.u64 =
 385                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 386                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 387                                gmx_cfg.u64 & ~1ull);
 388
 389                 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
 390                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
 391                                ptr[0]);
 392                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
 393                                ptr[1]);
 394                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
 395                                ptr[2]);
 396                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
 397                                ptr[3]);
 398                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
 399                                ptr[4]);
 400                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
 401                                ptr[5]);
 402                 cvm_oct_common_set_multicast_list(dev);
 403                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 404                                gmx_cfg.u64);
 405         }
 406         return 0;
 407 }
 408
 409 /**
 410  * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
 411  * @dev:    The device in question.
 412  * @addr:   Socket address.
 413  *
 414  * Returns Zero on success
 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         if (dev->phydev)
 478                 phy_disconnect(dev->phydev);
 479 }
 480
 481 int cvm_oct_common_open(struct net_device *dev,
 482                         void (*link_poll)(struct net_device *))
 483 {
 484         union cvmx_gmxx_prtx_cfg gmx_cfg;
 485         struct octeon_ethernet *priv = netdev_priv(dev);
 486         int interface = INTERFACE(priv->port);
 487         int index = INDEX(priv->port);
 488         cvmx_helper_link_info_t link_info;
 489         int rv;
 490
 491         rv = cvm_oct_phy_setup_device(dev);
 492         if (rv)
 493                 return rv;
 494
 495         gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 496         gmx_cfg.s.en = 1;
 497         if (octeon_has_feature(OCTEON_FEATURE_PKND))
 498                 gmx_cfg.s.pknd = priv->port;
 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 (dev->phydev) {
 505                 int r = phy_read_status(dev->phydev);
 506
 507                 if (r == 0 && dev->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                 link_poll(dev);
 516         }
 517
 518         return 0;
 519 }
 520
 521 void cvm_oct_link_poll(struct net_device *dev)
 522 {
 523         struct octeon_ethernet *priv = netdev_priv(dev);
 524         cvmx_helper_link_info_t link_info;
 525
 526         link_info = cvmx_helper_link_get(priv->port);
 527         if (link_info.u64 == priv->link_info)
 528                 return;
 529
 530         if (cvmx_helper_link_set(priv->port, link_info))
 531                 link_info.u64 = priv->link_info;
 532         else
 533                 priv->link_info = link_info.u64;
 534
 535         if (link_info.s.link_up) {
 536                 if (!netif_carrier_ok(dev))
 537                         netif_carrier_on(dev);
 538         } else if (netif_carrier_ok(dev)) {
 539                 netif_carrier_off(dev);
 540         }
 541         cvm_oct_note_carrier(priv, link_info);
 542 }
 543
 544 static int cvm_oct_xaui_open(struct net_device *dev)
 545 {
 546         return cvm_oct_common_open(dev, cvm_oct_link_poll);
 547 }
 548
 549 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
 550         .ndo_init               = cvm_oct_common_init,
 551         .ndo_uninit             = cvm_oct_common_uninit,
 552         .ndo_start_xmit         = cvm_oct_xmit,
 553         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 554         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 555         .ndo_do_ioctl           = cvm_oct_ioctl,
 556         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 557         .ndo_get_stats          = cvm_oct_common_get_stats,
 558 #ifdef CONFIG_NET_POLL_CONTROLLER
 559         .ndo_poll_controller    = cvm_oct_poll_controller,
 560 #endif
 561 };
 562
 563 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
 564         .ndo_init               = cvm_oct_common_init,
 565         .ndo_uninit             = cvm_oct_common_uninit,
 566         .ndo_open               = cvm_oct_xaui_open,
 567         .ndo_stop               = cvm_oct_common_stop,
 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
 579 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
 580         .ndo_init               = cvm_oct_sgmii_init,
 581         .ndo_uninit             = cvm_oct_common_uninit,
 582         .ndo_open               = cvm_oct_sgmii_open,
 583         .ndo_stop               = cvm_oct_common_stop,
 584         .ndo_start_xmit         = cvm_oct_xmit,
 585         .ndo_set_rx_mode        = 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 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
 596         .ndo_init               = cvm_oct_spi_init,
 597         .ndo_uninit             = cvm_oct_spi_uninit,
 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
 609 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
 610         .ndo_init               = cvm_oct_common_init,
 611         .ndo_uninit             = cvm_oct_common_uninit,
 612         .ndo_open               = cvm_oct_rgmii_open,
 613         .ndo_stop               = cvm_oct_common_stop,
 614         .ndo_start_xmit         = cvm_oct_xmit,
 615         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 616         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 617         .ndo_do_ioctl           = cvm_oct_ioctl,
 618         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 619         .ndo_get_stats          = cvm_oct_common_get_stats,
 620 #ifdef CONFIG_NET_POLL_CONTROLLER
 621         .ndo_poll_controller    = cvm_oct_poll_controller,
 622 #endif
 623 };
 624
 625 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
 626         .ndo_init               = cvm_oct_common_init,
 627         .ndo_start_xmit         = cvm_oct_xmit_pow,
 628         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 629         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 630         .ndo_do_ioctl           = cvm_oct_ioctl,
 631         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 632         .ndo_get_stats          = cvm_oct_common_get_stats,
 633 #ifdef CONFIG_NET_POLL_CONTROLLER
 634         .ndo_poll_controller    = cvm_oct_poll_controller,
 635 #endif
 636 };
 637
 638 static struct device_node *cvm_oct_of_get_child(
 639                                 const struct device_node *parent, int reg_val)
 640 {
 641         struct device_node *node = NULL;
 642         int size;
 643         const __be32 *addr;
 644
 645         for (;;) {
 646                 node = of_get_next_child(parent, node);
 647                 if (!node)
 648                         break;
 649                 addr = of_get_property(node, "reg", &size);
 650                 if (addr && (be32_to_cpu(*addr) == reg_val))
 651                         break;
 652         }
 653         return node;
 654 }
 655
 656 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
 657                                                  int interface, int port)
 658 {
 659         struct device_node *ni, *np;
 660
 661         ni = cvm_oct_of_get_child(pip, interface);
 662         if (!ni)
 663                 return NULL;
 664
 665         np = cvm_oct_of_get_child(ni, port);
 666         of_node_put(ni);
 667
 668         return np;
 669 }
 670
 671 static void cvm_set_rgmii_delay(struct device_node *np, int iface, int port)
 672 {
 673         u32 delay_value;
 674
 675         if (!of_property_read_u32(np, "rx-delay", &delay_value))
 676                 cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, iface), delay_value);
 677         if (!of_property_read_u32(np, "tx-delay", &delay_value))
 678                 cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, iface), delay_value);
 679 }
 680
 681 static int cvm_oct_probe(struct platform_device *pdev)
 682 {
 683         int num_interfaces;
 684         int interface;
 685         int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
 686         int qos;
 687         struct device_node *pip;
 688
 689         octeon_mdiobus_force_mod_depencency();
 690
 691         pip = pdev->dev.of_node;
 692         if (!pip) {
 693                 pr_err("Error: No 'pip' in /aliases\n");
 694                 return -EINVAL;
 695         }
 696
 697         cvm_oct_configure_common_hw();
 698
 699         cvmx_helper_initialize_packet_io_global();
 700
 701         if (receive_group_order) {
 702                 if (receive_group_order > 4)
 703                         receive_group_order = 4;
 704                 pow_receive_groups = (1 << (1 << receive_group_order)) - 1;
 705         } else {
 706                 pow_receive_groups = BIT(pow_receive_group);
 707         }
 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
 723                         if (receive_group_order) {
 724                                 int tag_mask;
 725
 726                                 /* We support only 16 groups at the moment, so
 727                                  * always disable the two additional "hidden"
 728                                  * tag_mask bits on CN68XX.
 729                                  */
 730                                 if (OCTEON_IS_MODEL(OCTEON_CN68XX))
 731                                         pip_prt_tagx.u64 |= 0x3ull << 44;
 732
 733                                 tag_mask = ~((1 << receive_group_order) - 1);
 734                                 pip_prt_tagx.s.grptagbase       = 0;
 735                                 pip_prt_tagx.s.grptagmask       = tag_mask;
 736                                 pip_prt_tagx.s.grptag           = 1;
 737                                 pip_prt_tagx.s.tag_mode         = 0;
 738                                 pip_prt_tagx.s.inc_prt_flag     = 1;
 739                                 pip_prt_tagx.s.ip6_dprt_flag    = 1;
 740                                 pip_prt_tagx.s.ip4_dprt_flag    = 1;
 741                                 pip_prt_tagx.s.ip6_sprt_flag    = 1;
 742                                 pip_prt_tagx.s.ip4_sprt_flag    = 1;
 743                                 pip_prt_tagx.s.ip6_dst_flag     = 1;
 744                                 pip_prt_tagx.s.ip4_dst_flag     = 1;
 745                                 pip_prt_tagx.s.ip6_src_flag     = 1;
 746                                 pip_prt_tagx.s.ip4_src_flag     = 1;
 747                                 pip_prt_tagx.s.grp              = 0;
 748                         } else {
 749                                 pip_prt_tagx.s.grptag   = 0;
 750                                 pip_prt_tagx.s.grp      = pow_receive_group;
 751                         }
 752
 753                         cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
 754                                        pip_prt_tagx.u64);
 755                 }
 756         }
 757
 758         cvmx_helper_ipd_and_packet_input_enable();
 759
 760         memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
 761
 762         /*
 763          * Initialize the FAU used for counting packet buffers that
 764          * need to be freed.
 765          */
 766         cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
 767
 768         /* Initialize the FAU used for counting tx SKBs that need to be freed */
 769         cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
 770
 771         if ((pow_send_group != -1)) {
 772                 struct net_device *dev;
 773
 774                 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
 775                 if (dev) {
 776                         /* Initialize the device private structure. */
 777                         struct octeon_ethernet *priv = netdev_priv(dev);
 778
 779                         dev->netdev_ops = &cvm_oct_pow_netdev_ops;
 780                         priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
 781                         priv->port = CVMX_PIP_NUM_INPUT_PORTS;
 782                         priv->queue = -1;
 783                         strcpy(dev->name, "pow%d");
 784                         for (qos = 0; qos < 16; qos++)
 785                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 786
 787                         if (register_netdev(dev) < 0) {
 788                                 pr_err("Failed to register ethernet device for POW\n");
 789                                 free_netdev(dev);
 790                         } else {
 791                                 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
 792                                 pr_info("%s: POW send group %d, receive group %d\n",
 793                                         dev->name, pow_send_group,
 794                                         pow_receive_group);
 795                         }
 796                 } else {
 797                         pr_err("Failed to allocate ethernet device for POW\n");
 798                 }
 799         }
 800
 801         num_interfaces = cvmx_helper_get_number_of_interfaces();
 802         for (interface = 0; interface < num_interfaces; interface++) {
 803                 cvmx_helper_interface_mode_t imode =
 804                     cvmx_helper_interface_get_mode(interface);
 805                 int num_ports = cvmx_helper_ports_on_interface(interface);
 806                 int port;
 807                 int port_index;
 808
 809                 for (port_index = 0,
 810                      port = cvmx_helper_get_ipd_port(interface, 0);
 811                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 812                      port_index++, port++) {
 813                         struct octeon_ethernet *priv;
 814                         struct net_device *dev =
 815                             alloc_etherdev(sizeof(struct octeon_ethernet));
 816                         if (!dev) {
 817                                 pr_err("Failed to allocate ethernet device for port %d\n",
 818                                        port);
 819                                 continue;
 820                         }
 821
 822                         /* Initialize the device private structure. */
 823                         priv = netdev_priv(dev);
 824                         priv->netdev = dev;
 825                         priv->of_node = cvm_oct_node_for_port(pip, interface,
 826                                                                 port_index);
 827
 828                         INIT_DELAYED_WORK(&priv->port_periodic_work,
 829                                           cvm_oct_periodic_worker);
 830                         priv->imode = imode;
 831                         priv->port = port;
 832                         priv->queue = cvmx_pko_get_base_queue(priv->port);
 833                         priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
 834                         for (qos = 0; qos < 16; qos++)
 835                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 836                         for (qos = 0; qos < cvmx_pko_get_num_queues(port);
 837                              qos++)
 838                                 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
 839
 840                         switch (priv->imode) {
 841                         /* These types don't support ports to IPD/PKO */
 842                         case CVMX_HELPER_INTERFACE_MODE_DISABLED:
 843                         case CVMX_HELPER_INTERFACE_MODE_PCIE:
 844                         case CVMX_HELPER_INTERFACE_MODE_PICMG:
 845                                 break;
 846
 847                         case CVMX_HELPER_INTERFACE_MODE_NPI:
 848                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 849                                 strcpy(dev->name, "npi%d");
 850                                 break;
 851
 852                         case CVMX_HELPER_INTERFACE_MODE_XAUI:
 853                                 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
 854                                 strcpy(dev->name, "xaui%d");
 855                                 break;
 856
 857                         case CVMX_HELPER_INTERFACE_MODE_LOOP:
 858                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 859                                 strcpy(dev->name, "loop%d");
 860                                 break;
 861
 862                         case CVMX_HELPER_INTERFACE_MODE_SGMII:
 863                                 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
 864                                 strcpy(dev->name, "eth%d");
 865                                 break;
 866
 867                         case CVMX_HELPER_INTERFACE_MODE_SPI:
 868                                 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
 869                                 strcpy(dev->name, "spi%d");
 870                                 break;
 871
 872                         case CVMX_HELPER_INTERFACE_MODE_RGMII:
 873                         case CVMX_HELPER_INTERFACE_MODE_GMII:
 874                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 875                                 strcpy(dev->name, "eth%d");
 876                                 cvm_set_rgmii_delay(priv->of_node, interface,
 877                                                     port_index);
 878                                 break;
 879                         }
 880
 881                         if (!dev->netdev_ops) {
 882                                 free_netdev(dev);
 883                         } else if (register_netdev(dev) < 0) {
 884                                 pr_err("Failed to register ethernet device for interface %d, port %d\n",
 885                                        interface, priv->port);
 886                                 free_netdev(dev);
 887                         } else {
 888                                 cvm_oct_device[priv->port] = dev;
 889                                 fau -=
 890                                     cvmx_pko_get_num_queues(priv->port) *
 891                                     sizeof(u32);
 892                                 schedule_delayed_work(&priv->port_periodic_work, HZ);
 893                         }
 894                 }
 895         }
 896
 897         cvm_oct_tx_initialize();
 898         cvm_oct_rx_initialize();
 899
 900         /*
 901          * 150 uS: about 10 1500-byte packets at 1GE.
 902          */
 903         cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
 904
 905         schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 906
 907         return 0;
 908 }
 909
 910 static int cvm_oct_remove(struct platform_device *pdev)
 911 {
 912         int port;
 913
 914         cvmx_ipd_disable();
 915
 916         atomic_inc_return(&cvm_oct_poll_queue_stopping);
 917         cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
 918
 919         cvm_oct_rx_shutdown();
 920         cvm_oct_tx_shutdown();
 921
 922         cvmx_pko_disable();
 923
 924         /* Free the ethernet devices */
 925         for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
 926                 if (cvm_oct_device[port]) {
 927                         struct net_device *dev = cvm_oct_device[port];
 928                         struct octeon_ethernet *priv = netdev_priv(dev);
 929
 930                         cancel_delayed_work_sync(&priv->port_periodic_work);
 931
 932                         cvm_oct_tx_shutdown_dev(dev);
 933                         unregister_netdev(dev);
 934                         free_netdev(dev);
 935                         cvm_oct_device[port] = NULL;
 936                 }
 937         }
 938
 939         cvmx_pko_shutdown();
 940
 941         cvmx_ipd_free_ptr();
 942
 943         /* Free the HW pools */
 944         cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 945                               num_packet_buffers);
 946         cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 947                               num_packet_buffers);
 948         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 949                 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 950                                       CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
 951         return 0;
 952 }
 953
 954 static const struct of_device_id cvm_oct_match[] = {
 955         {
 956                 .compatible = "cavium,octeon-3860-pip",
 957         },
 958         {},
 959 };
 960 MODULE_DEVICE_TABLE(of, cvm_oct_match);
 961
 962 static struct platform_driver cvm_oct_driver = {
 963         .probe          = cvm_oct_probe,
 964         .remove         = cvm_oct_remove,
 965         .driver         = {
 966                 .name   = KBUILD_MODNAME,
 967                 .of_match_table = cvm_oct_match,
 968         },
 969 };
 970
 971 module_platform_driver(cvm_oct_driver);
 972
 973 MODULE_LICENSE("GPL");
 974 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
 975 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");