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 #include <asm/octeon/cvmx-asxx-defs.h>
  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 static 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 static int receive_group_order;
  57 module_param(receive_group_order, int, 0444);
  58 MODULE_PARM_DESC(receive_group_order, "\n"
  59         "\tOrder (0..4) of receive groups to take into use. Ethernet hardware\n"
  60         "\twill be configured to send incoming packets to multiple POW\n"
  61         "\tgroups. pow_receive_group parameter is ignored when multiple\n"
  62         "\tgroups are taken into use and groups are allocated starting\n"
  63         "\tfrom 0. By default, a single group is used.\n");
  64
  65 int pow_send_group = -1;
  66 module_param(pow_send_group, int, 0644);
  67 MODULE_PARM_DESC(pow_send_group, "\n"
  68         "\tPOW group to send packets to other software on. This\n"
  69         "\tcontrols the creation of the virtual device pow0.\n"
  70         "\talways_use_pow also depends on this value.");
  71
  72 int always_use_pow;
  73 module_param(always_use_pow, int, 0444);
  74 MODULE_PARM_DESC(always_use_pow, "\n"
  75         "\tWhen set, always send to the pow group. This will cause\n"
  76         "\tpackets sent to real ethernet devices to be sent to the\n"
  77         "\tPOW group instead of the hardware. Unless some other\n"
  78         "\tapplication changes the config, packets will still be\n"
  79         "\treceived from the low level hardware. Use this option\n"
  80         "\tto allow a CVMX app to intercept all packets from the\n"
  81         "\tlinux kernel. You must specify pow_send_group along with\n"
  82         "\tthis option.");
  83
  84 char pow_send_list[128] = "";
  85 module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444);
  86 MODULE_PARM_DESC(pow_send_list, "\n"
  87         "\tComma separated list of ethernet devices that should use the\n"
  88         "\tPOW for transmit instead of the actual ethernet hardware. This\n"
  89         "\tis a per port version of always_use_pow. always_use_pow takes\n"
  90         "\tprecedence over this list. For example, setting this to\n"
  91         "\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n"
  92         "\tusing the pow_send_group.");
  93
  94 int rx_napi_weight = 32;
  95 module_param(rx_napi_weight, int, 0444);
  96 MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter.");
  97
  98 /* Mask indicating which receive groups are in use. */
  99 int pow_receive_groups;
 100
 101 /*
 102  * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
 103  *
 104  * Set to one right before cvm_oct_poll_queue is destroyed.
 105  */
 106 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
 107
 108 /*
 109  * Array of every ethernet device owned by this driver indexed by
 110  * the ipd input port number.
 111  */
 112 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
 113
 114 u64 cvm_oct_tx_poll_interval;
 115
 116 static void cvm_oct_rx_refill_worker(struct work_struct *work);
 117 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
 118
 119 static void cvm_oct_rx_refill_worker(struct work_struct *work)
 120 {
 121         /*
 122          * FPA 0 may have been drained, try to refill it if we need
 123          * more than num_packet_buffers / 2, otherwise normal receive
 124          * processing will refill it.  If it were drained, no packets
 125          * could be received so cvm_oct_napi_poll would never be
 126          * invoked to do the refill.
 127          */
 128         cvm_oct_rx_refill_pool(num_packet_buffers / 2);
 129
 130         if (!atomic_read(&cvm_oct_poll_queue_stopping))
 131                 schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 132 }
 133
 134 static void cvm_oct_periodic_worker(struct work_struct *work)
 135 {
 136         struct octeon_ethernet *priv = container_of(work,
 137                                                     struct octeon_ethernet,
 138                                                     port_periodic_work.work);
 139
 140         if (priv->poll)
 141                 priv->poll(cvm_oct_device[priv->port]);
 142
 143         cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats(
 144                                                 cvm_oct_device[priv->port]);
 145
 146         if (!atomic_read(&cvm_oct_poll_queue_stopping))
 147                 schedule_delayed_work(&priv->port_periodic_work, HZ);
 148 }
 149
 150 static void cvm_oct_configure_common_hw(void)
 151 {
 152         /* Setup the FPA */
 153         cvmx_fpa_enable();
 154         cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 155                              num_packet_buffers);
 156         cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 157                              num_packet_buffers);
 158         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 159                 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 160                                      CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 1024);
 161
 162 #ifdef __LITTLE_ENDIAN
 163         {
 164                 union cvmx_ipd_ctl_status ipd_ctl_status;
 165
 166                 ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 167                 ipd_ctl_status.s.pkt_lend = 1;
 168                 ipd_ctl_status.s.wqe_lend = 1;
 169                 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
 170         }
 171 #endif
 172
 173         cvmx_helper_setup_red(num_packet_buffers / 4, num_packet_buffers / 8);
 174 }
 175
 176 /**
 177  * cvm_oct_free_work- Free a work queue entry
 178  *
 179  * @work_queue_entry: Work queue entry to free
 180  *
 181  * Returns Zero on success, Negative on failure.
 182  */
 183 int cvm_oct_free_work(void *work_queue_entry)
 184 {
 185         cvmx_wqe_t *work = work_queue_entry;
 186
 187         int segments = work->word2.s.bufs;
 188         union cvmx_buf_ptr segment_ptr = work->packet_ptr;
 189
 190         while (segments--) {
 191                 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
 192                         cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
 193                 if (unlikely(!segment_ptr.s.i))
 194                         cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
 195                                       segment_ptr.s.pool,
 196                                       CVMX_FPA_PACKET_POOL_SIZE / 128);
 197                 segment_ptr = next_ptr;
 198         }
 199         cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, 1);
 200
 201         return 0;
 202 }
 203 EXPORT_SYMBOL(cvm_oct_free_work);
 204
 205 /**
 206  * cvm_oct_common_get_stats - get the low level ethernet statistics
 207  * @dev:    Device to get the statistics from
 208  *
 209  * Returns Pointer to the statistics
 210  */
 211 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
 212 {
 213         cvmx_pip_port_status_t rx_status;
 214         cvmx_pko_port_status_t tx_status;
 215         struct octeon_ethernet *priv = netdev_priv(dev);
 216
 217         if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
 218                 if (octeon_is_simulation()) {
 219                         /* The simulator doesn't support statistics */
 220                         memset(&rx_status, 0, sizeof(rx_status));
 221                         memset(&tx_status, 0, sizeof(tx_status));
 222                 } else {
 223                         cvmx_pip_get_port_status(priv->port, 1, &rx_status);
 224                         cvmx_pko_get_port_status(priv->port, 1, &tx_status);
 225                 }
 226
 227                 priv->stats.rx_packets += rx_status.inb_packets;
 228                 priv->stats.tx_packets += tx_status.packets;
 229                 priv->stats.rx_bytes += rx_status.inb_octets;
 230                 priv->stats.tx_bytes += tx_status.octets;
 231                 priv->stats.multicast += rx_status.multicast_packets;
 232                 priv->stats.rx_crc_errors += rx_status.inb_errors;
 233                 priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
 234                 priv->stats.rx_dropped += rx_status.dropped_packets;
 235         }
 236
 237         return &priv->stats;
 238 }
 239
 240 /**
 241  * cvm_oct_common_change_mtu - change the link MTU
 242  * @dev:     Device to change
 243  * @new_mtu: The new MTU
 244  *
 245  * Returns Zero on success
 246  */
 247 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
 248 {
 249         struct octeon_ethernet *priv = netdev_priv(dev);
 250         int interface = INTERFACE(priv->port);
 251 #if IS_ENABLED(CONFIG_VLAN_8021Q)
 252         int vlan_bytes = 4;
 253 #else
 254         int vlan_bytes = 0;
 255 #endif
 256
 257         /*
 258          * Limit the MTU to make sure the ethernet packets are between
 259          * 64 bytes and 65535 bytes.
 260          */
 261         if ((new_mtu + 14 + 4 + vlan_bytes < 64) ||
 262             (new_mtu + 14 + 4 + vlan_bytes > 65392)) {
 263                 pr_err("MTU must be between %d and %d.\n",
 264                        64 - 14 - 4 - vlan_bytes, 65392 - 14 - 4 - vlan_bytes);
 265                 return -EINVAL;
 266         }
 267         dev->mtu = new_mtu;
 268
 269         if ((interface < 2) &&
 270             (cvmx_helper_interface_get_mode(interface) !=
 271                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 272                 int index = INDEX(priv->port);
 273                 /* Add ethernet header and FCS, and VLAN if configured. */
 274                 int max_packet = new_mtu + 14 + 4 + vlan_bytes;
 275
 276                 if (OCTEON_IS_MODEL(OCTEON_CN3XXX) ||
 277                     OCTEON_IS_MODEL(OCTEON_CN58XX)) {
 278                         /* Signal errors on packets larger than the MTU */
 279                         cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
 280                                        max_packet);
 281                 } else {
 282                         /*
 283                          * Set the hardware to truncate packets larger
 284                          * than the MTU and smaller the 64 bytes.
 285                          */
 286                         union cvmx_pip_frm_len_chkx frm_len_chk;
 287
 288                         frm_len_chk.u64 = 0;
 289                         frm_len_chk.s.minlen = 64;
 290                         frm_len_chk.s.maxlen = max_packet;
 291                         cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
 292                                        frm_len_chk.u64);
 293                 }
 294                 /*
 295                  * Set the hardware to truncate packets larger than
 296                  * the MTU. The jabber register must be set to a
 297                  * multiple of 8 bytes, so round up.
 298                  */
 299                 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
 300                                (max_packet + 7) & ~7u);
 301         }
 302         return 0;
 303 }
 304
 305 /**
 306  * cvm_oct_common_set_multicast_list - set the multicast list
 307  * @dev:    Device to work on
 308  */
 309 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
 310 {
 311         union cvmx_gmxx_prtx_cfg gmx_cfg;
 312         struct octeon_ethernet *priv = netdev_priv(dev);
 313         int interface = INTERFACE(priv->port);
 314
 315         if ((interface < 2) &&
 316             (cvmx_helper_interface_get_mode(interface) !=
 317                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 318                 union cvmx_gmxx_rxx_adr_ctl control;
 319                 int index = INDEX(priv->port);
 320
 321                 control.u64 = 0;
 322                 control.s.bcst = 1;     /* Allow broadcast MAC addresses */
 323
 324                 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
 325                     (dev->flags & IFF_PROMISC))
 326                         /* Force accept multicast packets */
 327                         control.s.mcst = 2;
 328                 else
 329                         /* Force reject multicast packets */
 330                         control.s.mcst = 1;
 331
 332                 if (dev->flags & IFF_PROMISC)
 333                         /*
 334                          * Reject matches if promisc. Since CAM is
 335                          * shut off, should accept everything.
 336                          */
 337                         control.s.cam_mode = 0;
 338                 else
 339                         /* Filter packets based on the CAM */
 340                         control.s.cam_mode = 1;
 341
 342                 gmx_cfg.u64 =
 343                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 344                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 345                                gmx_cfg.u64 & ~1ull);
 346
 347                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
 348                                control.u64);
 349                 if (dev->flags & IFF_PROMISC)
 350                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 351                                        (index, interface), 0);
 352                 else
 353                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 354                                        (index, interface), 1);
 355
 356                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 357                                gmx_cfg.u64);
 358         }
 359 }
 360
 361 static int cvm_oct_set_mac_filter(struct net_device *dev)
 362 {
 363         struct octeon_ethernet *priv = netdev_priv(dev);
 364         union cvmx_gmxx_prtx_cfg gmx_cfg;
 365         int interface = INTERFACE(priv->port);
 366
 367         if ((interface < 2) &&
 368             (cvmx_helper_interface_get_mode(interface) !=
 369                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 370                 int i;
 371                 u8 *ptr = dev->dev_addr;
 372                 u64 mac = 0;
 373                 int index = INDEX(priv->port);
 374
 375                 for (i = 0; i < 6; i++)
 376                         mac = (mac << 8) | (u64)ptr[i];
 377
 378                 gmx_cfg.u64 =
 379                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 380                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 381                                gmx_cfg.u64 & ~1ull);
 382
 383                 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
 384                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
 385                                ptr[0]);
 386                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
 387                                ptr[1]);
 388                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
 389                                ptr[2]);
 390                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
 391                                ptr[3]);
 392                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
 393                                ptr[4]);
 394                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
 395                                ptr[5]);
 396                 cvm_oct_common_set_multicast_list(dev);
 397                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 398                                gmx_cfg.u64);
 399         }
 400         return 0;
 401 }
 402
 403 /**
 404  * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
 405  * @dev:    The device in question.
 406  * @addr:   Socket address.
 407  *
 408  * Returns Zero on success
 409  */
 410 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
 411 {
 412         int r = eth_mac_addr(dev, addr);
 413
 414         if (r)
 415                 return r;
 416         return cvm_oct_set_mac_filter(dev);
 417 }
 418
 419 /**
 420  * cvm_oct_common_init - per network device initialization
 421  * @dev:    Device to initialize
 422  *
 423  * Returns Zero on success
 424  */
 425 int cvm_oct_common_init(struct net_device *dev)
 426 {
 427         struct octeon_ethernet *priv = netdev_priv(dev);
 428         const u8 *mac = NULL;
 429
 430         if (priv->of_node)
 431                 mac = of_get_mac_address(priv->of_node);
 432
 433         if (mac)
 434                 ether_addr_copy(dev->dev_addr, mac);
 435         else
 436                 eth_hw_addr_random(dev);
 437
 438         /*
 439          * Force the interface to use the POW send if always_use_pow
 440          * was specified or it is in the pow send list.
 441          */
 442         if ((pow_send_group != -1) &&
 443             (always_use_pow || strstr(pow_send_list, dev->name)))
 444                 priv->queue = -1;
 445
 446         if (priv->queue != -1)
 447                 dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
 448
 449         /* We do our own locking, Linux doesn't need to */
 450         dev->features |= NETIF_F_LLTX;
 451         dev->ethtool_ops = &cvm_oct_ethtool_ops;
 452
 453         cvm_oct_set_mac_filter(dev);
 454         dev->netdev_ops->ndo_change_mtu(dev, dev->mtu);
 455
 456         /*
 457          * Zero out stats for port so we won't mistakenly show
 458          * counters from the bootloader.
 459          */
 460         memset(dev->netdev_ops->ndo_get_stats(dev), 0,
 461                sizeof(struct net_device_stats));
 462
 463         if (dev->netdev_ops->ndo_stop)
 464                 dev->netdev_ops->ndo_stop(dev);
 465
 466         return 0;
 467 }
 468
 469 void cvm_oct_common_uninit(struct net_device *dev)
 470 {
 471         if (dev->phydev)
 472                 phy_disconnect(dev->phydev);
 473 }
 474
 475 int cvm_oct_common_open(struct net_device *dev,
 476                         void (*link_poll)(struct net_device *))
 477 {
 478         union cvmx_gmxx_prtx_cfg gmx_cfg;
 479         struct octeon_ethernet *priv = netdev_priv(dev);
 480         int interface = INTERFACE(priv->port);
 481         int index = INDEX(priv->port);
 482         cvmx_helper_link_info_t link_info;
 483         int rv;
 484
 485         rv = cvm_oct_phy_setup_device(dev);
 486         if (rv)
 487                 return rv;
 488
 489         gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 490         gmx_cfg.s.en = 1;
 491         if (octeon_has_feature(OCTEON_FEATURE_PKND))
 492                 gmx_cfg.s.pknd = priv->port;
 493         cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
 494
 495         if (octeon_is_simulation())
 496                 return 0;
 497
 498         if (dev->phydev) {
 499                 int r = phy_read_status(dev->phydev);
 500
 501                 if (r == 0 && dev->phydev->link == 0)
 502                         netif_carrier_off(dev);
 503                 cvm_oct_adjust_link(dev);
 504         } else {
 505                 link_info = cvmx_helper_link_get(priv->port);
 506                 if (!link_info.s.link_up)
 507                         netif_carrier_off(dev);
 508                 priv->poll = link_poll;
 509                 link_poll(dev);
 510         }
 511
 512         return 0;
 513 }
 514
 515 void cvm_oct_link_poll(struct net_device *dev)
 516 {
 517         struct octeon_ethernet *priv = netdev_priv(dev);
 518         cvmx_helper_link_info_t link_info;
 519
 520         link_info = cvmx_helper_link_get(priv->port);
 521         if (link_info.u64 == priv->link_info)
 522                 return;
 523
 524         link_info = cvmx_helper_link_autoconf(priv->port);
 525         priv->link_info = link_info.u64;
 526
 527         if (link_info.s.link_up) {
 528                 if (!netif_carrier_ok(dev))
 529                         netif_carrier_on(dev);
 530         } else if (netif_carrier_ok(dev)) {
 531                 netif_carrier_off(dev);
 532         }
 533         cvm_oct_note_carrier(priv, link_info);
 534 }
 535
 536 static int cvm_oct_xaui_open(struct net_device *dev)
 537 {
 538         return cvm_oct_common_open(dev, cvm_oct_link_poll);
 539 }
 540
 541 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
 542         .ndo_init               = cvm_oct_common_init,
 543         .ndo_uninit             = cvm_oct_common_uninit,
 544         .ndo_start_xmit         = cvm_oct_xmit,
 545         .ndo_set_rx_mode        = 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
 555 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
 556         .ndo_init               = cvm_oct_common_init,
 557         .ndo_uninit             = cvm_oct_common_uninit,
 558         .ndo_open               = cvm_oct_xaui_open,
 559         .ndo_stop               = cvm_oct_common_stop,
 560         .ndo_start_xmit         = cvm_oct_xmit,
 561         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 562         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 563         .ndo_do_ioctl           = cvm_oct_ioctl,
 564         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 565         .ndo_get_stats          = cvm_oct_common_get_stats,
 566 #ifdef CONFIG_NET_POLL_CONTROLLER
 567         .ndo_poll_controller    = cvm_oct_poll_controller,
 568 #endif
 569 };
 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
 587 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
 588         .ndo_init               = cvm_oct_spi_init,
 589         .ndo_uninit             = cvm_oct_spi_uninit,
 590         .ndo_start_xmit         = cvm_oct_xmit,
 591         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 592         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 593         .ndo_do_ioctl           = cvm_oct_ioctl,
 594         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 595         .ndo_get_stats          = cvm_oct_common_get_stats,
 596 #ifdef CONFIG_NET_POLL_CONTROLLER
 597         .ndo_poll_controller    = cvm_oct_poll_controller,
 598 #endif
 599 };
 600
 601 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
 602         .ndo_init               = cvm_oct_common_init,
 603         .ndo_uninit             = cvm_oct_common_uninit,
 604         .ndo_open               = cvm_oct_rgmii_open,
 605         .ndo_stop               = cvm_oct_common_stop,
 606         .ndo_start_xmit         = cvm_oct_xmit,
 607         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 608         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 609         .ndo_do_ioctl           = cvm_oct_ioctl,
 610         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 611         .ndo_get_stats          = cvm_oct_common_get_stats,
 612 #ifdef CONFIG_NET_POLL_CONTROLLER
 613         .ndo_poll_controller    = cvm_oct_poll_controller,
 614 #endif
 615 };
 616
 617 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
 618         .ndo_init               = cvm_oct_common_init,
 619         .ndo_start_xmit         = cvm_oct_xmit_pow,
 620         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 621         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 622         .ndo_do_ioctl           = cvm_oct_ioctl,
 623         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 624         .ndo_get_stats          = cvm_oct_common_get_stats,
 625 #ifdef CONFIG_NET_POLL_CONTROLLER
 626         .ndo_poll_controller    = cvm_oct_poll_controller,
 627 #endif
 628 };
 629
 630 static struct device_node *cvm_oct_of_get_child(
 631                                 const struct device_node *parent, int reg_val)
 632 {
 633         struct device_node *node = NULL;
 634         int size;
 635         const __be32 *addr;
 636
 637         for (;;) {
 638                 node = of_get_next_child(parent, node);
 639                 if (!node)
 640                         break;
 641                 addr = of_get_property(node, "reg", &size);
 642                 if (addr && (be32_to_cpu(*addr) == reg_val))
 643                         break;
 644         }
 645         return node;
 646 }
 647
 648 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
 649                                                  int interface, int port)
 650 {
 651         struct device_node *ni, *np;
 652
 653         ni = cvm_oct_of_get_child(pip, interface);
 654         if (!ni)
 655                 return NULL;
 656
 657         np = cvm_oct_of_get_child(ni, port);
 658         of_node_put(ni);
 659
 660         return np;
 661 }
 662
 663 static void cvm_set_rgmii_delay(struct device_node *np, int iface, int port)
 664 {
 665         u32 delay_value;
 666
 667         if (!of_property_read_u32(np, "rx-delay", &delay_value))
 668                 cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, iface), delay_value);
 669         if (!of_property_read_u32(np, "tx-delay", &delay_value))
 670                 cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, iface), delay_value);
 671 }
 672
 673 static int cvm_oct_probe(struct platform_device *pdev)
 674 {
 675         int num_interfaces;
 676         int interface;
 677         int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
 678         int qos;
 679         struct device_node *pip;
 680
 681         octeon_mdiobus_force_mod_depencency();
 682
 683         pip = pdev->dev.of_node;
 684         if (!pip) {
 685                 pr_err("Error: No 'pip' in /aliases\n");
 686                 return -EINVAL;
 687         }
 688
 689
 690         cvm_oct_configure_common_hw();
 691
 692         cvmx_helper_initialize_packet_io_global();
 693
 694         if (receive_group_order) {
 695                 if (receive_group_order > 4)
 696                         receive_group_order = 4;
 697                 pow_receive_groups = (1 << (1 << receive_group_order)) - 1;
 698         } else {
 699                 pow_receive_groups = BIT(pow_receive_group);
 700         }
 701
 702         /* Change the input group for all ports before input is enabled */
 703         num_interfaces = cvmx_helper_get_number_of_interfaces();
 704         for (interface = 0; interface < num_interfaces; interface++) {
 705                 int num_ports = cvmx_helper_ports_on_interface(interface);
 706                 int port;
 707
 708                 for (port = cvmx_helper_get_ipd_port(interface, 0);
 709                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 710                      port++) {
 711                         union cvmx_pip_prt_tagx pip_prt_tagx;
 712
 713                         pip_prt_tagx.u64 =
 714                             cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
 715
 716                         if (receive_group_order) {
 717                                 int tag_mask;
 718
 719                                 /* We support only 16 groups at the moment, so
 720                                  * always disable the two additional "hidden"
 721                                  * tag_mask bits on CN68XX.
 722                                  */
 723                                 if (OCTEON_IS_MODEL(OCTEON_CN68XX))
 724                                         pip_prt_tagx.u64 |= 0x3ull << 44;
 725
 726                                 tag_mask = ~((1 << receive_group_order) - 1);
 727                                 pip_prt_tagx.s.grptagbase       = 0;
 728                                 pip_prt_tagx.s.grptagmask       = tag_mask;
 729                                 pip_prt_tagx.s.grptag           = 1;
 730                                 pip_prt_tagx.s.tag_mode         = 0;
 731                                 pip_prt_tagx.s.inc_prt_flag     = 1;
 732                                 pip_prt_tagx.s.ip6_dprt_flag    = 1;
 733                                 pip_prt_tagx.s.ip4_dprt_flag    = 1;
 734                                 pip_prt_tagx.s.ip6_sprt_flag    = 1;
 735                                 pip_prt_tagx.s.ip4_sprt_flag    = 1;
 736                                 pip_prt_tagx.s.ip6_dst_flag     = 1;
 737                                 pip_prt_tagx.s.ip4_dst_flag     = 1;
 738                                 pip_prt_tagx.s.ip6_src_flag     = 1;
 739                                 pip_prt_tagx.s.ip4_src_flag     = 1;
 740                                 pip_prt_tagx.s.grp              = 0;
 741                         } else {
 742                                 pip_prt_tagx.s.grptag   = 0;
 743                                 pip_prt_tagx.s.grp      = pow_receive_group;
 744                         }
 745
 746                         cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
 747                                        pip_prt_tagx.u64);
 748                 }
 749         }
 750
 751         cvmx_helper_ipd_and_packet_input_enable();
 752
 753         memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
 754
 755         /*
 756          * Initialize the FAU used for counting packet buffers that
 757          * need to be freed.
 758          */
 759         cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
 760
 761         /* Initialize the FAU used for counting tx SKBs that need to be freed */
 762         cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
 763
 764         if ((pow_send_group != -1)) {
 765                 struct net_device *dev;
 766
 767                 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
 768                 if (dev) {
 769                         /* Initialize the device private structure. */
 770                         struct octeon_ethernet *priv = netdev_priv(dev);
 771
 772                         dev->netdev_ops = &cvm_oct_pow_netdev_ops;
 773                         priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
 774                         priv->port = CVMX_PIP_NUM_INPUT_PORTS;
 775                         priv->queue = -1;
 776                         strcpy(dev->name, "pow%d");
 777                         for (qos = 0; qos < 16; qos++)
 778                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 779
 780                         if (register_netdev(dev) < 0) {
 781                                 pr_err("Failed to register ethernet device for POW\n");
 782                                 free_netdev(dev);
 783                         } else {
 784                                 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
 785                                 pr_info("%s: POW send group %d, receive group %d\n",
 786                                         dev->name, pow_send_group,
 787                                         pow_receive_group);
 788                         }
 789                 } else {
 790                         pr_err("Failed to allocate ethernet device for POW\n");
 791                 }
 792         }
 793
 794         num_interfaces = cvmx_helper_get_number_of_interfaces();
 795         for (interface = 0; interface < num_interfaces; interface++) {
 796                 cvmx_helper_interface_mode_t imode =
 797                     cvmx_helper_interface_get_mode(interface);
 798                 int num_ports = cvmx_helper_ports_on_interface(interface);
 799                 int port;
 800                 int port_index;
 801
 802                 for (port_index = 0,
 803                      port = cvmx_helper_get_ipd_port(interface, 0);
 804                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 805                      port_index++, port++) {
 806                         struct octeon_ethernet *priv;
 807                         struct net_device *dev =
 808                             alloc_etherdev(sizeof(struct octeon_ethernet));
 809                         if (!dev) {
 810                                 pr_err("Failed to allocate ethernet device for port %d\n",
 811                                        port);
 812                                 continue;
 813                         }
 814
 815                         /* Initialize the device private structure. */
 816                         priv = netdev_priv(dev);
 817                         priv->netdev = dev;
 818                         priv->of_node = cvm_oct_node_for_port(pip, interface,
 819                                                                 port_index);
 820
 821                         INIT_DELAYED_WORK(&priv->port_periodic_work,
 822                                           cvm_oct_periodic_worker);
 823                         priv->imode = imode;
 824                         priv->port = port;
 825                         priv->queue = cvmx_pko_get_base_queue(priv->port);
 826                         priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
 827                         for (qos = 0; qos < 16; qos++)
 828                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 829                         for (qos = 0; qos < cvmx_pko_get_num_queues(port);
 830                              qos++)
 831                                 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
 832
 833                         switch (priv->imode) {
 834                         /* These types don't support ports to IPD/PKO */
 835                         case CVMX_HELPER_INTERFACE_MODE_DISABLED:
 836                         case CVMX_HELPER_INTERFACE_MODE_PCIE:
 837                         case CVMX_HELPER_INTERFACE_MODE_PICMG:
 838                                 break;
 839
 840                         case CVMX_HELPER_INTERFACE_MODE_NPI:
 841                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 842                                 strcpy(dev->name, "npi%d");
 843                                 break;
 844
 845                         case CVMX_HELPER_INTERFACE_MODE_XAUI:
 846                                 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
 847                                 strcpy(dev->name, "xaui%d");
 848                                 break;
 849
 850                         case CVMX_HELPER_INTERFACE_MODE_LOOP:
 851                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 852                                 strcpy(dev->name, "loop%d");
 853                                 break;
 854
 855                         case CVMX_HELPER_INTERFACE_MODE_SGMII:
 856                                 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
 857                                 strcpy(dev->name, "eth%d");
 858                                 break;
 859
 860                         case CVMX_HELPER_INTERFACE_MODE_SPI:
 861                                 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
 862                                 strcpy(dev->name, "spi%d");
 863                                 break;
 864
 865                         case CVMX_HELPER_INTERFACE_MODE_RGMII:
 866                         case CVMX_HELPER_INTERFACE_MODE_GMII:
 867                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 868                                 strcpy(dev->name, "eth%d");
 869                                 cvm_set_rgmii_delay(priv->of_node, interface,
 870                                                     port_index);
 871                                 break;
 872                         }
 873
 874                         if (!dev->netdev_ops) {
 875                                 free_netdev(dev);
 876                         } else if (register_netdev(dev) < 0) {
 877                                 pr_err("Failed to register ethernet device for interface %d, port %d\n",
 878                                        interface, priv->port);
 879                                 free_netdev(dev);
 880                         } else {
 881                                 cvm_oct_device[priv->port] = dev;
 882                                 fau -=
 883                                     cvmx_pko_get_num_queues(priv->port) *
 884                                     sizeof(u32);
 885                                 schedule_delayed_work(&priv->port_periodic_work, HZ);
 886                         }
 887                 }
 888         }
 889
 890         cvm_oct_tx_initialize();
 891         cvm_oct_rx_initialize();
 892
 893         /*
 894          * 150 uS: about 10 1500-byte packets at 1GE.
 895          */
 896         cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
 897
 898         schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 899
 900         return 0;
 901 }
 902
 903 static int cvm_oct_remove(struct platform_device *pdev)
 904 {
 905         int port;
 906
 907         cvmx_ipd_disable();
 908
 909         atomic_inc_return(&cvm_oct_poll_queue_stopping);
 910         cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
 911
 912         cvm_oct_rx_shutdown();
 913         cvm_oct_tx_shutdown();
 914
 915         cvmx_pko_disable();
 916
 917         /* Free the ethernet devices */
 918         for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
 919                 if (cvm_oct_device[port]) {
 920                         struct net_device *dev = cvm_oct_device[port];
 921                         struct octeon_ethernet *priv = netdev_priv(dev);
 922
 923                         cancel_delayed_work_sync(&priv->port_periodic_work);
 924
 925                         cvm_oct_tx_shutdown_dev(dev);
 926                         unregister_netdev(dev);
 927                         free_netdev(dev);
 928                         cvm_oct_device[port] = NULL;
 929                 }
 930         }
 931
 932
 933         cvmx_pko_shutdown();
 934
 935         cvmx_ipd_free_ptr();
 936
 937         /* Free the HW pools */
 938         cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 939                               num_packet_buffers);
 940         cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 941                               num_packet_buffers);
 942         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 943                 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 944                                       CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
 945         return 0;
 946 }
 947
 948 static const struct of_device_id cvm_oct_match[] = {
 949         {
 950                 .compatible = "cavium,octeon-3860-pip",
 951         },
 952         {},
 953 };
 954 MODULE_DEVICE_TABLE(of, cvm_oct_match);
 955
 956 static struct platform_driver cvm_oct_driver = {
 957         .probe          = cvm_oct_probe,
 958         .remove         = cvm_oct_remove,
 959         .driver         = {
 960                 .name   = KBUILD_MODNAME,
 961                 .of_match_table = cvm_oct_match,
 962         },
 963 };
 964
 965 module_platform_driver(cvm_oct_driver);
 966
 967 MODULE_LICENSE("GPL");
 968 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
 969 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");