drivers/staging/octeon/ethernet.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * This file is based on code from OCTEON SDK by Cavium Networks.
   4  *
   5  * Copyright (c) 2003-2007 Cavium Networks
   6  */
   7
   8 #include <linux/platform_device.h>
   9 #include <linux/kernel.h>
  10 #include <linux/module.h>
  11 #include <linux/netdevice.h>
  12 #include <linux/etherdevice.h>
  13 #include <linux/phy.h>
  14 #include <linux/slab.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/of_net.h>
  17 #include <linux/if_ether.h>
  18 #include <linux/if_vlan.h>
  19
  20 #include <net/dst.h>
  21
  22 #include <asm/octeon/octeon.h>
  23
  24 #include "ethernet-defines.h"
  25 #include "octeon-ethernet.h"
  26 #include "ethernet-mem.h"
  27 #include "ethernet-rx.h"
  28 #include "ethernet-tx.h"
  29 #include "ethernet-mdio.h"
  30 #include "ethernet-util.h"
  31
  32 #include <asm/octeon/cvmx-pip.h>
  33 #include <asm/octeon/cvmx-pko.h>
  34 #include <asm/octeon/cvmx-fau.h>
  35 #include <asm/octeon/cvmx-ipd.h>
  36 #include <asm/octeon/cvmx-helper.h>
  37 #include <asm/octeon/cvmx-asxx-defs.h>
  38 #include <asm/octeon/cvmx-gmxx-defs.h>
  39
  40 #define OCTEON_MAX_MTU 65392
  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                 dev->stats.rx_packets += rx_status.inb_packets;
 228                 dev->stats.tx_packets += tx_status.packets;
 229                 dev->stats.rx_bytes += rx_status.inb_octets;
 230                 dev->stats.tx_bytes += tx_status.octets;
 231                 dev->stats.multicast += rx_status.multicast_packets;
 232                 dev->stats.rx_crc_errors += rx_status.inb_errors;
 233                 dev->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
 234                 dev->stats.rx_dropped += rx_status.dropped_packets;
 235         }
 236
 237         return &dev->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 = VLAN_HLEN;
 253 #else
 254         int vlan_bytes = 0;
 255 #endif
 256         int mtu_overhead = ETH_HLEN + ETH_FCS_LEN + vlan_bytes;
 257
 258         dev->mtu = new_mtu;
 259
 260         if ((interface < 2) &&
 261             (cvmx_helper_interface_get_mode(interface) !=
 262                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 263                 int index = INDEX(priv->port);
 264                 /* Add ethernet header and FCS, and VLAN if configured. */
 265                 int max_packet = new_mtu + mtu_overhead;
 266
 267                 if (OCTEON_IS_MODEL(OCTEON_CN3XXX) ||
 268                     OCTEON_IS_MODEL(OCTEON_CN58XX)) {
 269                         /* Signal errors on packets larger than the MTU */
 270                         cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
 271                                        max_packet);
 272                 } else {
 273                         /*
 274                          * Set the hardware to truncate packets larger
 275                          * than the MTU and smaller the 64 bytes.
 276                          */
 277                         union cvmx_pip_frm_len_chkx frm_len_chk;
 278
 279                         frm_len_chk.u64 = 0;
 280                         frm_len_chk.s.minlen = VLAN_ETH_ZLEN;
 281                         frm_len_chk.s.maxlen = max_packet;
 282                         cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
 283                                        frm_len_chk.u64);
 284                 }
 285                 /*
 286                  * Set the hardware to truncate packets larger than
 287                  * the MTU. The jabber register must be set to a
 288                  * multiple of 8 bytes, so round up.
 289                  */
 290                 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
 291                                (max_packet + 7) & ~7u);
 292         }
 293         return 0;
 294 }
 295
 296 /**
 297  * cvm_oct_common_set_multicast_list - set the multicast list
 298  * @dev:    Device to work on
 299  */
 300 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
 301 {
 302         union cvmx_gmxx_prtx_cfg gmx_cfg;
 303         struct octeon_ethernet *priv = netdev_priv(dev);
 304         int interface = INTERFACE(priv->port);
 305
 306         if ((interface < 2) &&
 307             (cvmx_helper_interface_get_mode(interface) !=
 308                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 309                 union cvmx_gmxx_rxx_adr_ctl control;
 310                 int index = INDEX(priv->port);
 311
 312                 control.u64 = 0;
 313                 control.s.bcst = 1;     /* Allow broadcast MAC addresses */
 314
 315                 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
 316                     (dev->flags & IFF_PROMISC))
 317                         /* Force accept multicast packets */
 318                         control.s.mcst = 2;
 319                 else
 320                         /* Force reject multicast packets */
 321                         control.s.mcst = 1;
 322
 323                 if (dev->flags & IFF_PROMISC)
 324                         /*
 325                          * Reject matches if promisc. Since CAM is
 326                          * shut off, should accept everything.
 327                          */
 328                         control.s.cam_mode = 0;
 329                 else
 330                         /* Filter packets based on the CAM */
 331                         control.s.cam_mode = 1;
 332
 333                 gmx_cfg.u64 =
 334                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 335                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 336                                gmx_cfg.u64 & ~1ull);
 337
 338                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
 339                                control.u64);
 340                 if (dev->flags & IFF_PROMISC)
 341                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 342                                        (index, interface), 0);
 343                 else
 344                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 345                                        (index, interface), 1);
 346
 347                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 348                                gmx_cfg.u64);
 349         }
 350 }
 351
 352 static int cvm_oct_set_mac_filter(struct net_device *dev)
 353 {
 354         struct octeon_ethernet *priv = netdev_priv(dev);
 355         union cvmx_gmxx_prtx_cfg gmx_cfg;
 356         int interface = INTERFACE(priv->port);
 357
 358         if ((interface < 2) &&
 359             (cvmx_helper_interface_get_mode(interface) !=
 360                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
 361                 int i;
 362                 u8 *ptr = dev->dev_addr;
 363                 u64 mac = 0;
 364                 int index = INDEX(priv->port);
 365
 366                 for (i = 0; i < 6; i++)
 367                         mac = (mac << 8) | (u64)ptr[i];
 368
 369                 gmx_cfg.u64 =
 370                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 371                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 372                                gmx_cfg.u64 & ~1ull);
 373
 374                 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
 375                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
 376                                ptr[0]);
 377                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
 378                                ptr[1]);
 379                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
 380                                ptr[2]);
 381                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
 382                                ptr[3]);
 383                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
 384                                ptr[4]);
 385                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
 386                                ptr[5]);
 387                 cvm_oct_common_set_multicast_list(dev);
 388                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 389                                gmx_cfg.u64);
 390         }
 391         return 0;
 392 }
 393
 394 /**
 395  * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
 396  * @dev:    The device in question.
 397  * @addr:   Socket address.
 398  *
 399  * Returns Zero on success
 400  */
 401 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
 402 {
 403         int r = eth_mac_addr(dev, addr);
 404
 405         if (r)
 406                 return r;
 407         return cvm_oct_set_mac_filter(dev);
 408 }
 409
 410 /**
 411  * cvm_oct_common_init - per network device initialization
 412  * @dev:    Device to initialize
 413  *
 414  * Returns Zero on success
 415  */
 416 int cvm_oct_common_init(struct net_device *dev)
 417 {
 418         struct octeon_ethernet *priv = netdev_priv(dev);
 419         const u8 *mac = NULL;
 420
 421         if (priv->of_node)
 422                 mac = of_get_mac_address(priv->of_node);
 423
 424         if (mac)
 425                 ether_addr_copy(dev->dev_addr, mac);
 426         else
 427                 eth_hw_addr_random(dev);
 428
 429         /*
 430          * Force the interface to use the POW send if always_use_pow
 431          * was specified or it is in the pow send list.
 432          */
 433         if ((pow_send_group != -1) &&
 434             (always_use_pow || strstr(pow_send_list, dev->name)))
 435                 priv->queue = -1;
 436
 437         if (priv->queue != -1)
 438                 dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
 439
 440         /* We do our own locking, Linux doesn't need to */
 441         dev->features |= NETIF_F_LLTX;
 442         dev->ethtool_ops = &cvm_oct_ethtool_ops;
 443
 444         cvm_oct_set_mac_filter(dev);
 445         dev_set_mtu(dev, dev->mtu);
 446
 447         /*
 448          * Zero out stats for port so we won't mistakenly show
 449          * counters from the bootloader.
 450          */
 451         memset(dev->netdev_ops->ndo_get_stats(dev), 0,
 452                sizeof(struct net_device_stats));
 453
 454         if (dev->netdev_ops->ndo_stop)
 455                 dev->netdev_ops->ndo_stop(dev);
 456
 457         return 0;
 458 }
 459
 460 void cvm_oct_common_uninit(struct net_device *dev)
 461 {
 462         if (dev->phydev)
 463                 phy_disconnect(dev->phydev);
 464 }
 465
 466 int cvm_oct_common_open(struct net_device *dev,
 467                         void (*link_poll)(struct net_device *))
 468 {
 469         union cvmx_gmxx_prtx_cfg gmx_cfg;
 470         struct octeon_ethernet *priv = netdev_priv(dev);
 471         int interface = INTERFACE(priv->port);
 472         int index = INDEX(priv->port);
 473         cvmx_helper_link_info_t link_info;
 474         int rv;
 475
 476         rv = cvm_oct_phy_setup_device(dev);
 477         if (rv)
 478                 return rv;
 479
 480         gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 481         gmx_cfg.s.en = 1;
 482         if (octeon_has_feature(OCTEON_FEATURE_PKND))
 483                 gmx_cfg.s.pknd = priv->port;
 484         cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
 485
 486         if (octeon_is_simulation())
 487                 return 0;
 488
 489         if (dev->phydev) {
 490                 int r = phy_read_status(dev->phydev);
 491
 492                 if (r == 0 && dev->phydev->link == 0)
 493                         netif_carrier_off(dev);
 494                 cvm_oct_adjust_link(dev);
 495         } else {
 496                 link_info = cvmx_helper_link_get(priv->port);
 497                 if (!link_info.s.link_up)
 498                         netif_carrier_off(dev);
 499                 priv->poll = link_poll;
 500                 link_poll(dev);
 501         }
 502
 503         return 0;
 504 }
 505
 506 void cvm_oct_link_poll(struct net_device *dev)
 507 {
 508         struct octeon_ethernet *priv = netdev_priv(dev);
 509         cvmx_helper_link_info_t link_info;
 510
 511         link_info = cvmx_helper_link_get(priv->port);
 512         if (link_info.u64 == priv->link_info)
 513                 return;
 514
 515         if (cvmx_helper_link_set(priv->port, link_info))
 516                 link_info.u64 = priv->link_info;
 517         else
 518                 priv->link_info = link_info.u64;
 519
 520         if (link_info.s.link_up) {
 521                 if (!netif_carrier_ok(dev))
 522                         netif_carrier_on(dev);
 523         } else if (netif_carrier_ok(dev)) {
 524                 netif_carrier_off(dev);
 525         }
 526         cvm_oct_note_carrier(priv, link_info);
 527 }
 528
 529 static int cvm_oct_xaui_open(struct net_device *dev)
 530 {
 531         return cvm_oct_common_open(dev, cvm_oct_link_poll);
 532 }
 533
 534 static const struct net_device_ops cvm_oct_npi_netdev_ops = {
 535         .ndo_init               = cvm_oct_common_init,
 536         .ndo_uninit             = cvm_oct_common_uninit,
 537         .ndo_start_xmit         = cvm_oct_xmit,
 538         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 539         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 540         .ndo_do_ioctl           = cvm_oct_ioctl,
 541         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 542         .ndo_get_stats          = cvm_oct_common_get_stats,
 543 #ifdef CONFIG_NET_POLL_CONTROLLER
 544         .ndo_poll_controller    = cvm_oct_poll_controller,
 545 #endif
 546 };
 547
 548 static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
 549         .ndo_init               = cvm_oct_common_init,
 550         .ndo_uninit             = cvm_oct_common_uninit,
 551         .ndo_open               = cvm_oct_xaui_open,
 552         .ndo_stop               = cvm_oct_common_stop,
 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_sgmii_netdev_ops = {
 565         .ndo_init               = cvm_oct_sgmii_init,
 566         .ndo_uninit             = cvm_oct_common_uninit,
 567         .ndo_open               = cvm_oct_sgmii_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_spi_netdev_ops = {
 581         .ndo_init               = cvm_oct_spi_init,
 582         .ndo_uninit             = cvm_oct_spi_uninit,
 583         .ndo_start_xmit         = cvm_oct_xmit,
 584         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 585         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 586         .ndo_do_ioctl           = cvm_oct_ioctl,
 587         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 588         .ndo_get_stats          = cvm_oct_common_get_stats,
 589 #ifdef CONFIG_NET_POLL_CONTROLLER
 590         .ndo_poll_controller    = cvm_oct_poll_controller,
 591 #endif
 592 };
 593
 594 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
 595         .ndo_init               = cvm_oct_common_init,
 596         .ndo_uninit             = cvm_oct_common_uninit,
 597         .ndo_open               = cvm_oct_rgmii_open,
 598         .ndo_stop               = cvm_oct_common_stop,
 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_pow_netdev_ops = {
 611         .ndo_init               = cvm_oct_common_init,
 612         .ndo_start_xmit         = cvm_oct_xmit_pow,
 613         .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 614         .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 615         .ndo_do_ioctl           = cvm_oct_ioctl,
 616         .ndo_change_mtu         = cvm_oct_common_change_mtu,
 617         .ndo_get_stats          = cvm_oct_common_get_stats,
 618 #ifdef CONFIG_NET_POLL_CONTROLLER
 619         .ndo_poll_controller    = cvm_oct_poll_controller,
 620 #endif
 621 };
 622
 623 static struct device_node *cvm_oct_of_get_child
 624                                 (const struct device_node *parent, int reg_val)
 625 {
 626         struct device_node *node = NULL;
 627         int size;
 628         const __be32 *addr;
 629
 630         for (;;) {
 631                 node = of_get_next_child(parent, node);
 632                 if (!node)
 633                         break;
 634                 addr = of_get_property(node, "reg", &size);
 635                 if (addr && (be32_to_cpu(*addr) == reg_val))
 636                         break;
 637         }
 638         return node;
 639 }
 640
 641 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
 642                                                  int interface, int port)
 643 {
 644         struct device_node *ni, *np;
 645
 646         ni = cvm_oct_of_get_child(pip, interface);
 647         if (!ni)
 648                 return NULL;
 649
 650         np = cvm_oct_of_get_child(ni, port);
 651         of_node_put(ni);
 652
 653         return np;
 654 }
 655
 656 static void cvm_set_rgmii_delay(struct device_node *np, int iface, int port)
 657 {
 658         u32 delay_value;
 659
 660         if (!of_property_read_u32(np, "rx-delay", &delay_value))
 661                 cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, iface), delay_value);
 662         if (!of_property_read_u32(np, "tx-delay", &delay_value))
 663                 cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, iface), delay_value);
 664 }
 665
 666 static int cvm_oct_probe(struct platform_device *pdev)
 667 {
 668         int num_interfaces;
 669         int interface;
 670         int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
 671         int qos;
 672         struct device_node *pip;
 673         int mtu_overhead = ETH_HLEN + ETH_FCS_LEN;
 674
 675 #if IS_ENABLED(CONFIG_VLAN_8021Q)
 676         mtu_overhead += VLAN_HLEN;
 677 #endif
 678
 679         octeon_mdiobus_force_mod_depencency();
 680
 681         pip = pdev->dev.of_node;
 682         if (!pip) {
 683                 pr_err("Error: No 'pip' in /aliases\n");
 684                 return -EINVAL;
 685         }
 686
 687         cvm_oct_configure_common_hw();
 688
 689         cvmx_helper_initialize_packet_io_global();
 690
 691         if (receive_group_order) {
 692                 if (receive_group_order > 4)
 693                         receive_group_order = 4;
 694                 pow_receive_groups = (1 << (1 << receive_group_order)) - 1;
 695         } else {
 696                 pow_receive_groups = BIT(pow_receive_group);
 697         }
 698
 699         /* Change the input group for all ports before input is enabled */
 700         num_interfaces = cvmx_helper_get_number_of_interfaces();
 701         for (interface = 0; interface < num_interfaces; interface++) {
 702                 int num_ports = cvmx_helper_ports_on_interface(interface);
 703                 int port;
 704
 705                 for (port = cvmx_helper_get_ipd_port(interface, 0);
 706                      port < cvmx_helper_get_ipd_port(interface, num_ports);
 707                      port++) {
 708                         union cvmx_pip_prt_tagx pip_prt_tagx;
 709
 710                         pip_prt_tagx.u64 =
 711                             cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
 712
 713                         if (receive_group_order) {
 714                                 int tag_mask;
 715
 716                                 /* We support only 16 groups at the moment, so
 717                                  * always disable the two additional "hidden"
 718                                  * tag_mask bits on CN68XX.
 719                                  */
 720                                 if (OCTEON_IS_MODEL(OCTEON_CN68XX))
 721                                         pip_prt_tagx.u64 |= 0x3ull << 44;
 722
 723                                 tag_mask = ~((1 << receive_group_order) - 1);
 724                                 pip_prt_tagx.s.grptagbase       = 0;
 725                                 pip_prt_tagx.s.grptagmask       = tag_mask;
 726                                 pip_prt_tagx.s.grptag           = 1;
 727                                 pip_prt_tagx.s.tag_mode         = 0;
 728                                 pip_prt_tagx.s.inc_prt_flag     = 1;
 729                                 pip_prt_tagx.s.ip6_dprt_flag    = 1;
 730                                 pip_prt_tagx.s.ip4_dprt_flag    = 1;
 731                                 pip_prt_tagx.s.ip6_sprt_flag    = 1;
 732                                 pip_prt_tagx.s.ip4_sprt_flag    = 1;
 733                                 pip_prt_tagx.s.ip6_dst_flag     = 1;
 734                                 pip_prt_tagx.s.ip4_dst_flag     = 1;
 735                                 pip_prt_tagx.s.ip6_src_flag     = 1;
 736                                 pip_prt_tagx.s.ip4_src_flag     = 1;
 737                                 pip_prt_tagx.s.grp              = 0;
 738                         } else {
 739                                 pip_prt_tagx.s.grptag   = 0;
 740                                 pip_prt_tagx.s.grp      = pow_receive_group;
 741                         }
 742
 743                         cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
 744                                        pip_prt_tagx.u64);
 745                 }
 746         }
 747
 748         cvmx_helper_ipd_and_packet_input_enable();
 749
 750         memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
 751
 752         /*
 753          * Initialize the FAU used for counting packet buffers that
 754          * need to be freed.
 755          */
 756         cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
 757
 758         /* Initialize the FAU used for counting tx SKBs that need to be freed */
 759         cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
 760
 761         if ((pow_send_group != -1)) {
 762                 struct net_device *dev;
 763
 764                 dev = alloc_etherdev(sizeof(struct octeon_ethernet));
 765                 if (dev) {
 766                         /* Initialize the device private structure. */
 767                         struct octeon_ethernet *priv = netdev_priv(dev);
 768
 769                         SET_NETDEV_DEV(dev, &pdev->dev);
 770                         dev->netdev_ops = &cvm_oct_pow_netdev_ops;
 771                         priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
 772                         priv->port = CVMX_PIP_NUM_INPUT_PORTS;
 773                         priv->queue = -1;
 774                         strcpy(dev->name, "pow%d");
 775                         for (qos = 0; qos < 16; qos++)
 776                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 777                         dev->min_mtu = VLAN_ETH_ZLEN - mtu_overhead;
 778                         dev->max_mtu = OCTEON_MAX_MTU - mtu_overhead;
 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                         SET_NETDEV_DEV(dev, &pdev->dev);
 817                         priv = netdev_priv(dev);
 818                         priv->netdev = dev;
 819                         priv->of_node = cvm_oct_node_for_port(pip, interface,
 820                                                               port_index);
 821
 822                         INIT_DELAYED_WORK(&priv->port_periodic_work,
 823                                           cvm_oct_periodic_worker);
 824                         priv->imode = imode;
 825                         priv->port = port;
 826                         priv->queue = cvmx_pko_get_base_queue(priv->port);
 827                         priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
 828                         for (qos = 0; qos < 16; qos++)
 829                                 skb_queue_head_init(&priv->tx_free_list[qos]);
 830                         for (qos = 0; qos < cvmx_pko_get_num_queues(port);
 831                              qos++)
 832                                 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
 833                         dev->min_mtu = VLAN_ETH_ZLEN - mtu_overhead;
 834                         dev->max_mtu = OCTEON_MAX_MTU - mtu_overhead;
 835
 836                         switch (priv->imode) {
 837                         /* These types don't support ports to IPD/PKO */
 838                         case CVMX_HELPER_INTERFACE_MODE_DISABLED:
 839                         case CVMX_HELPER_INTERFACE_MODE_PCIE:
 840                         case CVMX_HELPER_INTERFACE_MODE_PICMG:
 841                                 break;
 842
 843                         case CVMX_HELPER_INTERFACE_MODE_NPI:
 844                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 845                                 strcpy(dev->name, "npi%d");
 846                                 break;
 847
 848                         case CVMX_HELPER_INTERFACE_MODE_XAUI:
 849                                 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
 850                                 strcpy(dev->name, "xaui%d");
 851                                 break;
 852
 853                         case CVMX_HELPER_INTERFACE_MODE_LOOP:
 854                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 855                                 strcpy(dev->name, "loop%d");
 856                                 break;
 857
 858                         case CVMX_HELPER_INTERFACE_MODE_SGMII:
 859                                 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
 860                                 strcpy(dev->name, "eth%d");
 861                                 break;
 862
 863                         case CVMX_HELPER_INTERFACE_MODE_SPI:
 864                                 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
 865                                 strcpy(dev->name, "spi%d");
 866                                 break;
 867
 868                         case CVMX_HELPER_INTERFACE_MODE_RGMII:
 869                         case CVMX_HELPER_INTERFACE_MODE_GMII:
 870                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 871                                 strcpy(dev->name, "eth%d");
 872                                 cvm_set_rgmii_delay(priv->of_node, interface,
 873                                                     port_index);
 874                                 break;
 875                         }
 876
 877                         if (!dev->netdev_ops) {
 878                                 free_netdev(dev);
 879                         } else if (register_netdev(dev) < 0) {
 880                                 pr_err("Failed to register ethernet device for interface %d, port %d\n",
 881                                        interface, priv->port);
 882                                 free_netdev(dev);
 883                         } else {
 884                                 cvm_oct_device[priv->port] = dev;
 885                                 fau -=
 886                                     cvmx_pko_get_num_queues(priv->port) *
 887                                     sizeof(u32);
 888                                 schedule_delayed_work(&priv->port_periodic_work,
 889                                                       HZ);
 890                         }
 891                 }
 892         }
 893
 894         cvm_oct_tx_initialize();
 895         cvm_oct_rx_initialize();
 896
 897         /*
 898          * 150 uS: about 10 1500-byte packets at 1GE.
 899          */
 900         cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
 901
 902         schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 903
 904         return 0;
 905 }
 906
 907 static int cvm_oct_remove(struct platform_device *pdev)
 908 {
 909         int port;
 910
 911         cvmx_ipd_disable();
 912
 913         atomic_inc_return(&cvm_oct_poll_queue_stopping);
 914         cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
 915
 916         cvm_oct_rx_shutdown();
 917         cvm_oct_tx_shutdown();
 918
 919         cvmx_pko_disable();
 920
 921         /* Free the ethernet devices */
 922         for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
 923                 if (cvm_oct_device[port]) {
 924                         struct net_device *dev = cvm_oct_device[port];
 925                         struct octeon_ethernet *priv = netdev_priv(dev);
 926
 927                         cancel_delayed_work_sync(&priv->port_periodic_work);
 928
 929                         cvm_oct_tx_shutdown_dev(dev);
 930                         unregister_netdev(dev);
 931                         free_netdev(dev);
 932                         cvm_oct_device[port] = NULL;
 933                 }
 934         }
 935
 936         cvmx_pko_shutdown();
 937
 938         cvmx_ipd_free_ptr();
 939
 940         /* Free the HW pools */
 941         cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 942                               num_packet_buffers);
 943         cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 944                               num_packet_buffers);
 945         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 946                 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 947                                       CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
 948         return 0;
 949 }
 950
 951 static const struct of_device_id cvm_oct_match[] = {
 952         {
 953                 .compatible = "cavium,octeon-3860-pip",
 954         },
 955         {},
 956 };
 957 MODULE_DEVICE_TABLE(of, cvm_oct_match);
 958
 959 static struct platform_driver cvm_oct_driver = {
 960         .probe          = cvm_oct_probe,
 961         .remove         = cvm_oct_remove,
 962         .driver         = {
 963                 .name   = KBUILD_MODNAME,
 964                 .of_match_table = cvm_oct_match,
 965         },
 966 };
 967
 968 module_platform_driver(cvm_oct_driver);
 969
 970 MODULE_LICENSE("GPL");
 971 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
 972 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");