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_mdio.h>
  20 #include <linux/of_net.h>
  21 #include <linux/if_ether.h>
  22 #include <linux/if_vlan.h>
  23
  24 #include <net/dst.h>
  25
  26 #include <asm/octeon/octeon.h>
  27
  28 #include "ethernet-defines.h"
  29 #include "octeon-ethernet.h"
  30 #include "ethernet-mem.h"
  31 #include "ethernet-rx.h"
  32 #include "ethernet-tx.h"
  33 #include "ethernet-mdio.h"
  34 #include "ethernet-util.h"
  35
  36 #include <asm/octeon/cvmx-pip.h>
  37 #include <asm/octeon/cvmx-pko.h>
  38 #include <asm/octeon/cvmx-fau.h>
  39 #include <asm/octeon/cvmx-ipd.h>
  40 #include <asm/octeon/cvmx-helper.h>
  41 #include <asm/octeon/cvmx-asxx-defs.h>
  42 #include <asm/octeon/cvmx-gmxx-defs.h>
  43 #include <asm/octeon/cvmx-smix-defs.h>
  44
  45 #define OCTEON_MAX_MTU 65392
  46
  47 static int num_packet_buffers = 1024;
  48 module_param(num_packet_buffers, int, 0444);
  49 MODULE_PARM_DESC(num_packet_buffers, "\n"
  50         "\tNumber of packet buffers to allocate and store in the\n"
  51         "\tFPA. By default, 1024 packet buffers are used.\n");
  52
  53 static int pow_receive_group = 15;
  54 module_param(pow_receive_group, int, 0444);
  55 MODULE_PARM_DESC(pow_receive_group, "\n"
  56         "\tPOW group to receive packets from. All ethernet hardware\n"
  57         "\twill be configured to send incoming packets to this POW\n"
  58         "\tgroup. Also any other software can submit packets to this\n"
  59         "\tgroup for the kernel to process.");
  60
  61 static int receive_group_order;
  62 module_param(receive_group_order, int, 0444);
  63 MODULE_PARM_DESC(receive_group_order, "\n"
  64         "\tOrder (0..4) of receive groups to take into use. Ethernet hardware\n"
  65         "\twill be configured to send incoming packets to multiple POW\n"
  66         "\tgroups. pow_receive_group parameter is ignored when multiple\n"
  67         "\tgroups are taken into use and groups are allocated starting\n"
  68         "\tfrom 0. By default, a single group is used.\n");
  69
  70 int pow_send_group = -1;
  71 module_param(pow_send_group, int, 0644);
  72 MODULE_PARM_DESC(pow_send_group, "\n"
  73         "\tPOW group to send packets to other software on. This\n"
  74         "\tcontrols the creation of the virtual device pow0.\n"
  75         "\talways_use_pow also depends on this value.");
  76
  77 int always_use_pow;
  78 module_param(always_use_pow, int, 0444);
  79 MODULE_PARM_DESC(always_use_pow, "\n"
  80         "\tWhen set, always send to the pow group. This will cause\n"
  81         "\tpackets sent to real ethernet devices to be sent to the\n"
  82         "\tPOW group instead of the hardware. Unless some other\n"
  83         "\tapplication changes the config, packets will still be\n"
  84         "\treceived from the low level hardware. Use this option\n"
  85         "\tto allow a CVMX app to intercept all packets from the\n"
  86         "\tlinux kernel. You must specify pow_send_group along with\n"
  87         "\tthis option.");
  88
  89 char pow_send_list[128] = "";
  90 module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444);
  91 MODULE_PARM_DESC(pow_send_list, "\n"
  92         "\tComma separated list of ethernet devices that should use the\n"
  93         "\tPOW for transmit instead of the actual ethernet hardware. This\n"
  94         "\tis a per port version of always_use_pow. always_use_pow takes\n"
  95         "\tprecedence over this list. For example, setting this to\n"
  96         "\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n"
  97         "\tusing the pow_send_group.");
  98
  99 int rx_napi_weight = 32;
 100 module_param(rx_napi_weight, int, 0444);
 101 MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter.");
 102
 103 /* Mask indicating which receive groups are in use. */
 104 int pow_receive_groups;
 105
 106 /*
 107  * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
 108  *
 109  * Set to one right before cvm_oct_poll_queue is destroyed.
 110  */
 111 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
 112
 113 /*
 114  * Array of every ethernet device owned by this driver indexed by
 115  * the ipd input port number.
 116  */
 117 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
 118
 119 u64 cvm_oct_tx_poll_interval;
 120
 121 static void cvm_oct_rx_refill_worker(struct work_struct *work);
 122 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
 123
 124 static void cvm_oct_rx_refill_worker(struct work_struct *work)
 125 {
 126         /*
 127          * FPA 0 may have been drained, try to refill it if we need
 128          * more than num_packet_buffers / 2, otherwise normal receive
 129          * processing will refill it.  If it were drained, no packets
 130          * could be received so cvm_oct_napi_poll would never be
 131          * invoked to do the refill.
 132          */
 133         cvm_oct_rx_refill_pool(num_packet_buffers / 2);
 134
 135         if (!atomic_read(&cvm_oct_poll_queue_stopping))
 136                 schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 137 }
 138
 139 static void cvm_oct_periodic_worker(struct work_struct *work)
 140 {
 141         struct octeon_ethernet *priv = container_of(work,
 142                                                     struct octeon_ethernet,
 143                                                     port_periodic_work.work);
 144
 145         if (priv->poll)
 146                 priv->poll(cvm_oct_device[priv->port]);
 147
 148         cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats(
 149                                                 cvm_oct_device[priv->port]);
 150
 151         if (!atomic_read(&cvm_oct_poll_queue_stopping))
 152                 schedule_delayed_work(&priv->port_periodic_work, HZ);
 153 }
 154
 155 static void cvm_oct_configure_common_hw(void)
 156 {
 157         /* Setup the FPA */
 158         cvmx_fpa_enable();
 159         cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 160                              num_packet_buffers);
 161         cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 162                              num_packet_buffers);
 163         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 164                 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 165                                      CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 1024);
 166
 167 #ifdef __LITTLE_ENDIAN
 168         {
 169                 union cvmx_ipd_ctl_status ipd_ctl_status;
 170
 171                 ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 172                 ipd_ctl_status.s.pkt_lend = 1;
 173                 ipd_ctl_status.s.wqe_lend = 1;
 174                 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
 175         }
 176 #endif
 177
 178         cvmx_helper_setup_red(num_packet_buffers / 4, num_packet_buffers / 8);
 179 }
 180
 181 /**
 182  * cvm_oct_free_work- Free a work queue entry
 183  *
 184  * @work_queue_entry: Work queue entry to free
 185  *
 186  * Returns Zero on success, Negative on failure.
 187  */
 188 int cvm_oct_free_work(void *work_queue_entry)
 189 {
 190         cvmx_wqe_t *work = work_queue_entry;
 191
 192         int segments = work->word2.s.bufs;
 193         union cvmx_buf_ptr segment_ptr = work->packet_ptr;
 194
 195         while (segments--) {
 196                 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
 197                         cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
 198                 if (unlikely(!segment_ptr.s.i))
 199                         cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
 200                                       segment_ptr.s.pool,
 201                                       CVMX_FPA_PACKET_POOL_SIZE / 128);
 202                 segment_ptr = next_ptr;
 203         }
 204         cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, 1);
 205
 206         return 0;
 207 }
 208 EXPORT_SYMBOL(cvm_oct_free_work);
 209
 210 /**
 211  * cvm_oct_common_get_stats - get the low level ethernet statistics
 212  * @dev:    Device to get the statistics from
 213  *
 214  * Returns Pointer to the statistics
 215  */
 216 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
 217 {
 218         cvmx_pip_port_status_t rx_status;
 219         cvmx_pko_port_status_t tx_status;
 220         struct octeon_ethernet *priv = netdev_priv(dev);
 221
 222         if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
 223                 if (octeon_is_simulation()) {
 224                         /* The simulator doesn't support statistics */
 225                         memset(&rx_status, 0, sizeof(rx_status));
 226                         memset(&tx_status, 0, sizeof(tx_status));
 227                 } else {
 228                         cvmx_pip_get_port_status(priv->port, 1, &rx_status);
 229                         cvmx_pko_get_port_status(priv->port, 1, &tx_status);
 230                 }
 231
 232                 priv->stats.rx_packets += rx_status.inb_packets;
 233                 priv->stats.tx_packets += tx_status.packets;
 234                 priv->stats.rx_bytes += rx_status.inb_octets;
 235                 priv->stats.tx_bytes += tx_status.octets;
 236                 priv->stats.multicast += rx_status.multicast_packets;
 237                 priv->stats.rx_crc_errors += rx_status.inb_errors;
 238                 priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
 239                 priv->stats.rx_dropped += rx_status.dropped_packets;
 240         }
 241
 242         return &priv->stats;
 243 }
 244
 245 /**
 246  * cvm_oct_common_change_mtu - change the link MTU
 247  * @dev:     Device to change
 248  * @new_mtu: The new MTU
 249  *
 250  * Returns Zero on success
 251  */
 252 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
 253 {
 254         struct octeon_ethernet *priv = netdev_priv(dev);
 255         int interface = INTERFACE(priv->port);
 256 #if IS_ENABLED(CONFIG_VLAN_8021Q)
 257         int vlan_bytes = VLAN_HLEN;
 258 #else
 259         int vlan_bytes = 0;
 260 #endif
 261         int mtu_overhead = ETH_HLEN + ETH_FCS_LEN + vlan_bytes;
 262
 263         /*
 264          * Limit the MTU to make sure the ethernet packets are between
 265          * 64 bytes and 65535 bytes.
 266          */
 267         if ((new_mtu + mtu_overhead < VLAN_ETH_ZLEN) ||
 268             (new_mtu + mtu_overhead > OCTEON_MAX_MTU)) {
 269                 pr_err("MTU must be between %d and %d.\n",
 270                        VLAN_ETH_ZLEN - mtu_overhead,
 271                        OCTEON_MAX_MTU - mtu_overhead);
 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                 int index = INDEX(priv->port);
 280                 /* Add ethernet header and FCS, and VLAN if configured. */
 281                 int max_packet = new_mtu + mtu_overhead;
 282
 283                 if (OCTEON_IS_MODEL(OCTEON_CN3XXX) ||
 284                     OCTEON_IS_MODEL(OCTEON_CN58XX)) {
 285                         /* Signal errors on packets larger than the MTU */
 286                         cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
 287                                        max_packet);
 288                 } else {
 289                         /*
 290                          * Set the hardware to truncate packets larger
 291                          * than the MTU and smaller the 64 bytes.
 292                          */
 293                         union cvmx_pip_frm_len_chkx frm_len_chk;
 294
 295                         frm_len_chk.u64 = 0;
 296                         frm_len_chk.s.minlen = VLAN_ETH_ZLEN;
 297                         frm_len_chk.s.maxlen = max_packet;
 298                         cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
 299                                        frm_len_chk.u64);
 300                 }
 301                 /*
 302                  * Set the hardware to truncate packets larger than
 303                  * the MTU. The jabber register must be set to a
 304                  * multiple of 8 bytes, so round up.
 305                  */
 306                 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
 307                                (max_packet + 7) & ~7u);
 308         }
 309         return 0;
 310 }
 311
 312 /**
 313  * cvm_oct_common_set_multicast_list - set the multicast list
 314  * @dev:    Device to work on
 315  */
 316 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
 317 {
 318         union cvmx_gmxx_prtx_cfg gmx_cfg;
 319         struct octeon_ethernet *priv = netdev_priv(dev);
 320         int interface = INTERFACE(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                 int index = INDEX(priv->port);
 327
 328                 control.u64 = 0;
 329                 control.s.bcst = 1;     /* Allow broadcast MAC addresses */
 330
 331                 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
 332                     (dev->flags & IFF_PROMISC))
 333                         /* Force accept multicast packets */
 334                         control.s.mcst = 2;
 335                 else
 336                         /* Force reject multicast packets */
 337                         control.s.mcst = 1;
 338
 339                 if (dev->flags & IFF_PROMISC)
 340                         /*
 341                          * Reject matches if promisc. Since CAM is
 342                          * shut off, should accept everything.
 343                          */
 344                         control.s.cam_mode = 0;
 345                 else
 346                         /* Filter packets based on the CAM */
 347                         control.s.cam_mode = 1;
 348
 349                 gmx_cfg.u64 =
 350                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 351                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 352                                gmx_cfg.u64 & ~1ull);
 353
 354                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
 355                                control.u64);
 356                 if (dev->flags & IFF_PROMISC)
 357                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 358                                        (index, interface), 0);
 359                 else
 360                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 361                                        (index, interface), 1);
 362
 363                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 364                                gmx_cfg.u64);
 365         }
 366 }
 367
 368 static int cvm_oct_set_mac_filter(struct net_device *dev)
 369 {
 370         struct octeon_ethernet *priv = netdev_priv(dev);
 371         union cvmx_gmxx_prtx_cfg gmx_cfg;
 372         int interface = INTERFACE(priv->port);
 373
 374         if ((interface < 2) &&
 375             (cvmx_helper_interface_get_mode(interface) !=
 376                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 377                 int i;
 378                 u8 *ptr = dev->dev_addr;
 379                 u64 mac = 0;
 380                 int index = INDEX(priv->port);
 381
 382                 for (i = 0; i < 6; i++)
 383                         mac = (mac << 8) | (u64)ptr[i];
 384
 385                 gmx_cfg.u64 =
 386                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 387                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 388                                gmx_cfg.u64 & ~1ull);
 389
 390                 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
 391                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
 392                                ptr[0]);
 393                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
 394                                ptr[1]);
 395                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
 396                                ptr[2]);
 397                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
 398                                ptr[3]);
 399                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
 400                                ptr[4]);
 401                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
 402                                ptr[5]);
 403                 cvm_oct_common_set_multicast_list(dev);
 404                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 405                                gmx_cfg.u64);
 406         }
 407         return 0;
 408 }
 409
 410 /**
 411  * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
 412  * @dev:    The device in question.
 413  * @addr:   Socket address.
 414  *
 415  * Returns Zero on success
 416  */
 417 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
 418 {
 419         int r = eth_mac_addr(dev, addr);
 420
 421         if (r)
 422                 return r;
 423         return cvm_oct_set_mac_filter(dev);
 424 }
 425
 426 /**
 427  * cvm_oct_common_init - per network device initialization
 428  * @dev:    Device to initialize
 429  *
 430  * Returns Zero on success
 431  */
 432 int cvm_oct_common_init(struct net_device *dev)
 433 {
 434         struct octeon_ethernet *priv = netdev_priv(dev);
 435         const u8 *mac = NULL;
 436
 437         if (priv->of_node)
 438                 mac = of_get_mac_address(priv->of_node);
 439
 440         if (mac)
 441                 ether_addr_copy(dev->dev_addr, mac);
 442         else
 443                 eth_hw_addr_random(dev);
 444
 445         /*
 446          * Force the interface to use the POW send if always_use_pow
 447          * was specified or it is in the pow send list.
 448          */
 449         if ((pow_send_group != -1) &&
 450             (always_use_pow || strstr(pow_send_list, dev->name)))
 451                 priv->queue = -1;
 452
 453         if (priv->queue != -1)
 454                 dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
 455
 456         /* We do our own locking, Linux doesn't need to */
 457         dev->features |= NETIF_F_LLTX;
 458         dev->ethtool_ops = &cvm_oct_ethtool_ops;
 459
 460         cvm_oct_set_mac_filter(dev);
 461         dev->netdev_ops->ndo_change_mtu(dev, dev->mtu);
 462
 463         /*
 464          * Zero out stats for port so we won't mistakenly show
 465          * counters from the bootloader.
 466          */
 467         memset(dev->netdev_ops->ndo_get_stats(dev), 0,
 468                sizeof(struct net_device_stats));
 469
 470         if (dev->netdev_ops->ndo_stop)
 471                 dev->netdev_ops->ndo_stop(dev);
 472
 473         return 0;
 474 }
 475
 476 void cvm_oct_common_uninit(struct net_device *dev)
 477 {
 478         if (dev->phydev)
 479                 phy_disconnect(dev->phydev);
 480 }
 481
 482 int cvm_oct_common_open(struct net_device *dev,
 483                         void (*link_poll)(struct net_device *))
 484 {
 485         union cvmx_gmxx_prtx_cfg gmx_cfg;
 486         struct octeon_ethernet *priv = netdev_priv(dev);
 487         int interface = INTERFACE(priv->port);
 488         int index = INDEX(priv->port);
 489         cvmx_helper_link_info_t link_info;
 490         int rv;
 491
 492         rv = cvm_oct_phy_setup_device(dev);
 493         if (rv)
 494                 return rv;
 495
 496         gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 497         gmx_cfg.s.en = 1;
 498         if (octeon_has_feature(OCTEON_FEATURE_PKND))
 499                 gmx_cfg.s.pknd = priv->port;
 500         cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
 501
 502         if (octeon_is_simulation())
 503                 return 0;
 504
 505         if (dev->phydev) {
 506                 int r = phy_read_status(dev->phydev);
 507
 508                 if (r == 0 && dev->phydev->link == 0)
 509                         netif_carrier_off(dev);
 510                 cvm_oct_adjust_link(dev);
 511         } else {
 512                 link_info = cvmx_helper_link_get(priv->port);
 513                 if (!link_info.s.link_up)
 514                         netif_carrier_off(dev);
 515                 priv->poll = link_poll;
 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         if (cvmx_helper_link_set(priv->port, link_info))
 532                 link_info.u64 = priv->link_info;
 533         else
 534                 priv->link_info = link_info.u64;
 535
 536         if (link_info.s.link_up) {
 537                 if (!netif_carrier_ok(dev))
 538                         netif_carrier_on(dev);
 539         } else if (netif_carrier_ok(dev)) {
 540                 netif_carrier_off(dev);
 541         }
 542         cvm_oct_note_carrier(priv, link_info);
 543 }
 544
 545 static int cvm_oct_xaui_open(struct net_device *dev)
 546 {
 547         return cvm_oct_common_open(dev, cvm_oct_link_poll);
 548 }
 549
 550 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
 551         .ndo_init               = cvm_oct_common_init,
 552         .ndo_uninit             = cvm_oct_common_uninit,
 553         .ndo_start_xmit         = cvm_oct_xmit,
 554         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 555         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 556         .ndo_do_ioctl           = cvm_oct_ioctl,
 557         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 558         .ndo_get_stats          = cvm_oct_common_get_stats,
 559 #ifdef CONFIG_NET_POLL_CONTROLLER
 560         .ndo_poll_controller    = cvm_oct_poll_controller,
 561 #endif
 562 };
 563
 564 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
 565         .ndo_init               = cvm_oct_common_init,
 566         .ndo_uninit             = cvm_oct_common_uninit,
 567         .ndo_open               = cvm_oct_xaui_open,
 568         .ndo_stop               = cvm_oct_common_stop,
 569         .ndo_start_xmit         = cvm_oct_xmit,
 570         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 571         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 572         .ndo_do_ioctl           = cvm_oct_ioctl,
 573         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 574         .ndo_get_stats          = cvm_oct_common_get_stats,
 575 #ifdef CONFIG_NET_POLL_CONTROLLER
 576         .ndo_poll_controller    = cvm_oct_poll_controller,
 577 #endif
 578 };
 579
 580 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
 581         .ndo_init               = cvm_oct_sgmii_init,
 582         .ndo_uninit             = cvm_oct_common_uninit,
 583         .ndo_open               = cvm_oct_sgmii_open,
 584         .ndo_stop               = cvm_oct_common_stop,
 585         .ndo_start_xmit         = cvm_oct_xmit,
 586         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 587         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 588         .ndo_do_ioctl           = cvm_oct_ioctl,
 589         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 590         .ndo_get_stats          = cvm_oct_common_get_stats,
 591 #ifdef CONFIG_NET_POLL_CONTROLLER
 592         .ndo_poll_controller    = cvm_oct_poll_controller,
 593 #endif
 594 };
 595
 596 static const struct net_device_ops cvm_oct_spi_netdev_ops = {
 597         .ndo_init               = cvm_oct_spi_init,
 598         .ndo_uninit             = cvm_oct_spi_uninit,
 599         .ndo_start_xmit         = cvm_oct_xmit,
 600         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 601         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 602         .ndo_do_ioctl           = cvm_oct_ioctl,
 603         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 604         .ndo_get_stats          = cvm_oct_common_get_stats,
 605 #ifdef CONFIG_NET_POLL_CONTROLLER
 606         .ndo_poll_controller    = cvm_oct_poll_controller,
 607 #endif
 608 };
 609
 610 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
 611         .ndo_init               = cvm_oct_common_init,
 612         .ndo_uninit             = cvm_oct_common_uninit,
 613         .ndo_open               = cvm_oct_rgmii_open,
 614         .ndo_stop               = cvm_oct_common_stop,
 615         .ndo_start_xmit         = cvm_oct_xmit,
 616         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 617         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 618         .ndo_do_ioctl           = cvm_oct_ioctl,
 619         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 620         .ndo_get_stats          = cvm_oct_common_get_stats,
 621 #ifdef CONFIG_NET_POLL_CONTROLLER
 622         .ndo_poll_controller    = cvm_oct_poll_controller,
 623 #endif
 624 };
 625
 626 static const struct net_device_ops cvm_oct_pow_netdev_ops = {
 627         .ndo_init               = cvm_oct_common_init,
 628         .ndo_start_xmit         = cvm_oct_xmit_pow,
 629         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 630         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 631         .ndo_do_ioctl           = cvm_oct_ioctl,
 632         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 633         .ndo_get_stats          = cvm_oct_common_get_stats,
 634 #ifdef CONFIG_NET_POLL_CONTROLLER
 635         .ndo_poll_controller    = cvm_oct_poll_controller,
 636 #endif
 637 };
 638
 639 static struct device_node *cvm_oct_of_get_child(
 640                                 const struct device_node *parent, int reg_val)
 641 {
 642         struct device_node *node = NULL;
 643         int size;
 644         const __be32 *addr;
 645
 646         for (;;) {
 647                 node = of_get_next_child(parent, node);
 648                 if (!node)
 649                         break;
 650                 addr = of_get_property(node, "reg", &size);
 651                 if (addr && (be32_to_cpu(*addr) == reg_val))
 652                         break;
 653         }
 654         return node;
 655 }
 656
 657 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
 658                                                  int interface, int port)
 659 {
 660         struct device_node *ni, *np;
 661
 662         ni = cvm_oct_of_get_child(pip, interface);
 663         if (!ni)
 664                 return NULL;
 665
 666         np = cvm_oct_of_get_child(ni, port);
 667         of_node_put(ni);
 668
 669         return np;
 670 }
 671
 672 static void cvm_set_rgmii_delay(struct device_node *np, int iface, int port)
 673 {
 674         u32 delay_value;
 675
 676         if (!of_property_read_u32(np, "rx-delay", &delay_value))
 677                 cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, iface), delay_value);
 678         if (!of_property_read_u32(np, "tx-delay", &delay_value))
 679                 cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, iface), delay_value);
 680 }
 681
 682 static int cvm_oct_probe(struct platform_device *pdev)
 683 {
 684         int num_interfaces;
 685         int interface;
 686         int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
 687         int qos;
 688         struct device_node *pip;
 689
 690         octeon_mdiobus_force_mod_depencency();
 691
 692         pip = pdev->dev.of_node;
 693         if (!pip) {
 694                 pr_err("Error: No 'pip' in /aliases\n");
 695                 return -EINVAL;
 696         }
 697
 698         cvm_oct_configure_common_hw();
 699
 700         cvmx_helper_initialize_packet_io_global();
 701
 702         if (receive_group_order) {
 703                 if (receive_group_order > 4)
 704                         receive_group_order = 4;
 705                 pow_receive_groups = (1 << (1 << receive_group_order)) - 1;
 706         } else {
 707                 pow_receive_groups = BIT(pow_receive_group);
 708         }
 709
 710         /* Change the input group for all ports before input is enabled */
 711         num_interfaces = cvmx_helper_get_number_of_interfaces();
 712         for (interface = 0; interface < num_interfaces; interface++) {
 713                 int num_ports = cvmx_helper_ports_on_interface(interface);
 714                 int port;
 715
 716                 for (port = cvmx_helper_get_ipd_port(interface, 0);
 717                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 718                      port++) {
 719                         union cvmx_pip_prt_tagx pip_prt_tagx;
 720
 721                         pip_prt_tagx.u64 =
 722                             cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
 723
 724                         if (receive_group_order) {
 725                                 int tag_mask;
 726
 727                                 /* We support only 16 groups at the moment, so
 728                                  * always disable the two additional "hidden"
 729                                  * tag_mask bits on CN68XX.
 730                                  */
 731                                 if (OCTEON_IS_MODEL(OCTEON_CN68XX))
 732                                         pip_prt_tagx.u64 |= 0x3ull << 44;
 733
 734                                 tag_mask = ~((1 << receive_group_order) - 1);
 735                                 pip_prt_tagx.s.grptagbase       = 0;
 736                                 pip_prt_tagx.s.grptagmask       = tag_mask;
 737                                 pip_prt_tagx.s.grptag           = 1;
 738                                 pip_prt_tagx.s.tag_mode         = 0;
 739                                 pip_prt_tagx.s.inc_prt_flag     = 1;
 740                                 pip_prt_tagx.s.ip6_dprt_flag    = 1;
 741                                 pip_prt_tagx.s.ip4_dprt_flag    = 1;
 742                                 pip_prt_tagx.s.ip6_sprt_flag    = 1;
 743                                 pip_prt_tagx.s.ip4_sprt_flag    = 1;
 744                                 pip_prt_tagx.s.ip6_dst_flag     = 1;
 745                                 pip_prt_tagx.s.ip4_dst_flag     = 1;
 746                                 pip_prt_tagx.s.ip6_src_flag     = 1;
 747                                 pip_prt_tagx.s.ip4_src_flag     = 1;
 748                                 pip_prt_tagx.s.grp              = 0;
 749                         } else {
 750                                 pip_prt_tagx.s.grptag   = 0;
 751                                 pip_prt_tagx.s.grp      = pow_receive_group;
 752                         }
 753
 754                         cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
 755                                        pip_prt_tagx.u64);
 756                 }
 757         }
 758
 759         cvmx_helper_ipd_and_packet_input_enable();
 760
 761         memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
 762
 763         /*
 764          * Initialize the FAU used for counting packet buffers that
 765          * need to be freed.
 766          */
 767         cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
 768
 769         /* Initialize the FAU used for counting tx SKBs that need to be freed */
 770         cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
 771
 772         if ((pow_send_group != -1)) {
 773                 struct net_device *dev;
 774
 775                 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
 776                 if (dev) {
 777                         /* Initialize the device private structure. */
 778                         struct octeon_ethernet *priv = netdev_priv(dev);
 779
 780                         SET_NETDEV_DEV(dev, &pdev->dev);
 781                         dev->netdev_ops = &cvm_oct_pow_netdev_ops;
 782                         priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
 783                         priv->port = CVMX_PIP_NUM_INPUT_PORTS;
 784                         priv->queue = -1;
 785                         strcpy(dev->name, "pow%d");
 786                         for (qos = 0; qos < 16; qos++)
 787                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 788
 789                         if (register_netdev(dev) < 0) {
 790                                 pr_err("Failed to register ethernet device for POW\n");
 791                                 free_netdev(dev);
 792                         } else {
 793                                 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
 794                                 pr_info("%s: POW send group %d, receive group %d\n",
 795                                         dev->name, pow_send_group,
 796                                         pow_receive_group);
 797                         }
 798                 } else {
 799                         pr_err("Failed to allocate ethernet device for POW\n");
 800                 }
 801         }
 802
 803         num_interfaces = cvmx_helper_get_number_of_interfaces();
 804         for (interface = 0; interface < num_interfaces; interface++) {
 805                 cvmx_helper_interface_mode_t imode =
 806                     cvmx_helper_interface_get_mode(interface);
 807                 int num_ports = cvmx_helper_ports_on_interface(interface);
 808                 int port;
 809                 int port_index;
 810
 811                 for (port_index = 0,
 812                      port = cvmx_helper_get_ipd_port(interface, 0);
 813                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 814                      port_index++, port++) {
 815                         struct octeon_ethernet *priv;
 816                         struct net_device *dev =
 817                             alloc_etherdev(sizeof(struct octeon_ethernet));
 818                         if (!dev) {
 819                                 pr_err("Failed to allocate ethernet device for port %d\n",
 820                                        port);
 821                                 continue;
 822                         }
 823
 824                         /* Initialize the device private structure. */
 825                         SET_NETDEV_DEV(dev, &pdev->dev);
 826                         priv = netdev_priv(dev);
 827                         priv->netdev = dev;
 828                         priv->of_node = cvm_oct_node_for_port(pip, interface,
 829                                                                 port_index);
 830
 831                         INIT_DELAYED_WORK(&priv->port_periodic_work,
 832                                           cvm_oct_periodic_worker);
 833                         priv->imode = imode;
 834                         priv->port = port;
 835                         priv->queue = cvmx_pko_get_base_queue(priv->port);
 836                         priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
 837                         for (qos = 0; qos < 16; qos++)
 838                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 839                         for (qos = 0; qos < cvmx_pko_get_num_queues(port);
 840                              qos++)
 841                                 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
 842
 843                         switch (priv->imode) {
 844                         /* These types don't support ports to IPD/PKO */
 845                         case CVMX_HELPER_INTERFACE_MODE_DISABLED:
 846                         case CVMX_HELPER_INTERFACE_MODE_PCIE:
 847                         case CVMX_HELPER_INTERFACE_MODE_PICMG:
 848                                 break;
 849
 850                         case CVMX_HELPER_INTERFACE_MODE_NPI:
 851                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 852                                 strcpy(dev->name, "npi%d");
 853                                 break;
 854
 855                         case CVMX_HELPER_INTERFACE_MODE_XAUI:
 856                                 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
 857                                 strcpy(dev->name, "xaui%d");
 858                                 break;
 859
 860                         case CVMX_HELPER_INTERFACE_MODE_LOOP:
 861                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 862                                 strcpy(dev->name, "loop%d");
 863                                 break;
 864
 865                         case CVMX_HELPER_INTERFACE_MODE_SGMII:
 866                                 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
 867                                 strcpy(dev->name, "eth%d");
 868                                 break;
 869
 870                         case CVMX_HELPER_INTERFACE_MODE_SPI:
 871                                 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
 872                                 strcpy(dev->name, "spi%d");
 873                                 break;
 874
 875                         case CVMX_HELPER_INTERFACE_MODE_RGMII:
 876                         case CVMX_HELPER_INTERFACE_MODE_GMII:
 877                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 878                                 strcpy(dev->name, "eth%d");
 879                                 cvm_set_rgmii_delay(priv->of_node, interface,
 880                                                     port_index);
 881                                 break;
 882                         }
 883
 884                         if (priv->of_node && of_phy_is_fixed_link(priv->of_node)) {
 885                                 if (of_phy_register_fixed_link(priv->of_node)) {
 886                                         netdev_err(dev, "Failed to register fixed link for interface %d, port %d\n",
 887                                                    interface, priv->port);
 888                                         dev->netdev_ops = NULL;
 889                                 }
 890                         }
 891
 892                         if (!dev->netdev_ops) {
 893                                 free_netdev(dev);
 894                         } else if (register_netdev(dev) < 0) {
 895                                 pr_err("Failed to register ethernet device for interface %d, port %d\n",
 896                                        interface, priv->port);
 897                                 free_netdev(dev);
 898                         } else {
 899                                 cvm_oct_device[priv->port] = dev;
 900                                 fau -=
 901                                     cvmx_pko_get_num_queues(priv->port) *
 902                                     sizeof(u32);
 903                                 schedule_delayed_work(&priv->port_periodic_work, HZ);
 904                         }
 905                 }
 906         }
 907
 908         cvm_oct_tx_initialize();
 909         cvm_oct_rx_initialize();
 910
 911         /*
 912          * 150 uS: about 10 1500-byte packets at 1GE.
 913          */
 914         cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
 915
 916         schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 917
 918         return 0;
 919 }
 920
 921 static int cvm_oct_remove(struct platform_device *pdev)
 922 {
 923         int port;
 924
 925         cvmx_ipd_disable();
 926
 927         atomic_inc_return(&cvm_oct_poll_queue_stopping);
 928         cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
 929
 930         cvm_oct_rx_shutdown();
 931         cvm_oct_tx_shutdown();
 932
 933         cvmx_pko_disable();
 934
 935         /* Free the ethernet devices */
 936         for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
 937                 if (cvm_oct_device[port]) {
 938                         struct net_device *dev = cvm_oct_device[port];
 939                         struct octeon_ethernet *priv = netdev_priv(dev);
 940
 941                         cancel_delayed_work_sync(&priv->port_periodic_work);
 942
 943                         cvm_oct_tx_shutdown_dev(dev);
 944                         unregister_netdev(dev);
 945                         free_netdev(dev);
 946                         cvm_oct_device[port] = NULL;
 947                 }
 948         }
 949
 950         cvmx_pko_shutdown();
 951
 952         cvmx_ipd_free_ptr();
 953
 954         /* Free the HW pools */
 955         cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 956                               num_packet_buffers);
 957         cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 958                               num_packet_buffers);
 959         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 960                 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 961                                       CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
 962         return 0;
 963 }
 964
 965 static const struct of_device_id cvm_oct_match[] = {
 966         {
 967                 .compatible = "cavium,octeon-3860-pip",
 968         },
 969         {},
 970 };
 971 MODULE_DEVICE_TABLE(of, cvm_oct_match);
 972
 973 static struct platform_driver cvm_oct_driver = {
 974         .probe          = cvm_oct_probe,
 975         .remove         = cvm_oct_remove,
 976         .driver         = {
 977                 .name   = KBUILD_MODNAME,
 978                 .of_match_table = cvm_oct_match,
 979         },
 980 };
 981
 982 module_platform_driver(cvm_oct_driver);
 983
 984 MODULE_LICENSE("GPL");
 985 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
 986 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");