linux/drivers/staging/octeon/ethernet.c
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   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_mdio.h>
  17#include <linux/of_net.h>
  18#include <linux/if_ether.h>
  19#include <linux/if_vlan.h>
  20
  21#include <net/dst.h>
  22
  23#include "octeon-ethernet.h"
  24#include "ethernet-defines.h"
  25#include "ethernet-mem.h"
  26#include "ethernet-rx.h"
  27#include "ethernet-tx.h"
  28#include "ethernet-mdio.h"
  29#include "ethernet-util.h"
  30
  31#define OCTEON_MAX_MTU 65392
  32
  33static int num_packet_buffers = 1024;
  34module_param(num_packet_buffers, int, 0444);
  35MODULE_PARM_DESC(num_packet_buffers, "\n"
  36        "\tNumber of packet buffers to allocate and store in the\n"
  37        "\tFPA. By default, 1024 packet buffers are used.\n");
  38
  39static int pow_receive_group = 15;
  40module_param(pow_receive_group, int, 0444);
  41MODULE_PARM_DESC(pow_receive_group, "\n"
  42        "\tPOW group to receive packets from. All ethernet hardware\n"
  43        "\twill be configured to send incoming packets to this POW\n"
  44        "\tgroup. Also any other software can submit packets to this\n"
  45        "\tgroup for the kernel to process.");
  46
  47static int receive_group_order;
  48module_param(receive_group_order, int, 0444);
  49MODULE_PARM_DESC(receive_group_order, "\n"
  50        "\tOrder (0..4) of receive groups to take into use. Ethernet hardware\n"
  51        "\twill be configured to send incoming packets to multiple POW\n"
  52        "\tgroups. pow_receive_group parameter is ignored when multiple\n"
  53        "\tgroups are taken into use and groups are allocated starting\n"
  54        "\tfrom 0. By default, a single group is used.\n");
  55
  56int pow_send_group = -1;
  57module_param(pow_send_group, int, 0644);
  58MODULE_PARM_DESC(pow_send_group, "\n"
  59        "\tPOW group to send packets to other software on. This\n"
  60        "\tcontrols the creation of the virtual device pow0.\n"
  61        "\talways_use_pow also depends on this value.");
  62
  63int always_use_pow;
  64module_param(always_use_pow, int, 0444);
  65MODULE_PARM_DESC(always_use_pow, "\n"
  66        "\tWhen set, always send to the pow group. This will cause\n"
  67        "\tpackets sent to real ethernet devices to be sent to the\n"
  68        "\tPOW group instead of the hardware. Unless some other\n"
  69        "\tapplication changes the config, packets will still be\n"
  70        "\treceived from the low level hardware. Use this option\n"
  71        "\tto allow a CVMX app to intercept all packets from the\n"
  72        "\tlinux kernel. You must specify pow_send_group along with\n"
  73        "\tthis option.");
  74
  75char pow_send_list[128] = "";
  76module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444);
  77MODULE_PARM_DESC(pow_send_list, "\n"
  78        "\tComma separated list of ethernet devices that should use the\n"
  79        "\tPOW for transmit instead of the actual ethernet hardware. This\n"
  80        "\tis a per port version of always_use_pow. always_use_pow takes\n"
  81        "\tprecedence over this list. For example, setting this to\n"
  82        "\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n"
  83        "\tusing the pow_send_group.");
  84
  85int rx_napi_weight = 32;
  86module_param(rx_napi_weight, int, 0444);
  87MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter.");
  88
  89/* Mask indicating which receive groups are in use. */
  90int pow_receive_groups;
  91
  92/*
  93 * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
  94 *
  95 * Set to one right before cvm_oct_poll_queue is destroyed.
  96 */
  97atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
  98
  99/*
 100 * Array of every ethernet device owned by this driver indexed by
 101 * the ipd input port number.
 102 */
 103struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
 104
 105u64 cvm_oct_tx_poll_interval;
 106
 107static void cvm_oct_rx_refill_worker(struct work_struct *work);
 108static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
 109
 110static void cvm_oct_rx_refill_worker(struct work_struct *work)
 111{
 112        /*
 113         * FPA 0 may have been drained, try to refill it if we need
 114         * more than num_packet_buffers / 2, otherwise normal receive
 115         * processing will refill it.  If it were drained, no packets
 116         * could be received so cvm_oct_napi_poll would never be
 117         * invoked to do the refill.
 118         */
 119        cvm_oct_rx_refill_pool(num_packet_buffers / 2);
 120
 121        if (!atomic_read(&cvm_oct_poll_queue_stopping))
 122                schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 123}
 124
 125static void cvm_oct_periodic_worker(struct work_struct *work)
 126{
 127        struct octeon_ethernet *priv = container_of(work,
 128                                                    struct octeon_ethernet,
 129                                                    port_periodic_work.work);
 130
 131        if (priv->poll)
 132                priv->poll(cvm_oct_device[priv->port]);
 133
 134        cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats
 135                                                (cvm_oct_device[priv->port]);
 136
 137        if (!atomic_read(&cvm_oct_poll_queue_stopping))
 138                schedule_delayed_work(&priv->port_periodic_work, HZ);
 139}
 140
 141static void cvm_oct_configure_common_hw(void)
 142{
 143        /* Setup the FPA */
 144        cvmx_fpa_enable();
 145        cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 146                             num_packet_buffers);
 147        cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 148                             num_packet_buffers);
 149        if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 150                cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 151                                     CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 1024);
 152
 153#ifdef __LITTLE_ENDIAN
 154        {
 155                union cvmx_ipd_ctl_status ipd_ctl_status;
 156
 157                ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
 158                ipd_ctl_status.s.pkt_lend = 1;
 159                ipd_ctl_status.s.wqe_lend = 1;
 160                cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
 161        }
 162#endif
 163
 164        cvmx_helper_setup_red(num_packet_buffers / 4, num_packet_buffers / 8);
 165}
 166
 167/**
 168 * cvm_oct_free_work- Free a work queue entry
 169 *
 170 * @work_queue_entry: Work queue entry to free
 171 *
 172 * Returns Zero on success, Negative on failure.
 173 */
 174int cvm_oct_free_work(void *work_queue_entry)
 175{
 176        struct cvmx_wqe *work = work_queue_entry;
 177
 178        int segments = work->word2.s.bufs;
 179        union cvmx_buf_ptr segment_ptr = work->packet_ptr;
 180
 181        while (segments--) {
 182                union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
 183                        cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
 184                if (unlikely(!segment_ptr.s.i))
 185                        cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
 186                                      segment_ptr.s.pool,
 187                                      CVMX_FPA_PACKET_POOL_SIZE / 128);
 188                segment_ptr = next_ptr;
 189        }
 190        cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, 1);
 191
 192        return 0;
 193}
 194EXPORT_SYMBOL(cvm_oct_free_work);
 195
 196/**
 197 * cvm_oct_common_get_stats - get the low level ethernet statistics
 198 * @dev:    Device to get the statistics from
 199 *
 200 * Returns Pointer to the statistics
 201 */
 202static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
 203{
 204        cvmx_pip_port_status_t rx_status;
 205        cvmx_pko_port_status_t tx_status;
 206        struct octeon_ethernet *priv = netdev_priv(dev);
 207
 208        if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
 209                if (octeon_is_simulation()) {
 210                        /* The simulator doesn't support statistics */
 211                        memset(&rx_status, 0, sizeof(rx_status));
 212                        memset(&tx_status, 0, sizeof(tx_status));
 213                } else {
 214                        cvmx_pip_get_port_status(priv->port, 1, &rx_status);
 215                        cvmx_pko_get_port_status(priv->port, 1, &tx_status);
 216                }
 217
 218                dev->stats.rx_packets += rx_status.inb_packets;
 219                dev->stats.tx_packets += tx_status.packets;
 220                dev->stats.rx_bytes += rx_status.inb_octets;
 221                dev->stats.tx_bytes += tx_status.octets;
 222                dev->stats.multicast += rx_status.multicast_packets;
 223                dev->stats.rx_crc_errors += rx_status.inb_errors;
 224                dev->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
 225                dev->stats.rx_dropped += rx_status.dropped_packets;
 226        }
 227
 228        return &dev->stats;
 229}
 230
 231/**
 232 * cvm_oct_common_change_mtu - change the link MTU
 233 * @dev:     Device to change
 234 * @new_mtu: The new MTU
 235 *
 236 * Returns Zero on success
 237 */
 238static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
 239{
 240        struct octeon_ethernet *priv = netdev_priv(dev);
 241        int interface = INTERFACE(priv->port);
 242#if IS_ENABLED(CONFIG_VLAN_8021Q)
 243        int vlan_bytes = VLAN_HLEN;
 244#else
 245        int vlan_bytes = 0;
 246#endif
 247        int mtu_overhead = ETH_HLEN + ETH_FCS_LEN + vlan_bytes;
 248
 249        dev->mtu = new_mtu;
 250
 251        if ((interface < 2) &&
 252            (cvmx_helper_interface_get_mode(interface) !=
 253                CVMX_HELPER_INTERFACE_MODE_SPI)) {
 254                int index = INDEX(priv->port);
 255                /* Add ethernet header and FCS, and VLAN if configured. */
 256                int max_packet = new_mtu + mtu_overhead;
 257
 258                if (OCTEON_IS_MODEL(OCTEON_CN3XXX) ||
 259                    OCTEON_IS_MODEL(OCTEON_CN58XX)) {
 260                        /* Signal errors on packets larger than the MTU */
 261                        cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
 262                                       max_packet);
 263                } else {
 264                        /*
 265                         * Set the hardware to truncate packets larger
 266                         * than the MTU and smaller the 64 bytes.
 267                         */
 268                        union cvmx_pip_frm_len_chkx frm_len_chk;
 269
 270                        frm_len_chk.u64 = 0;
 271                        frm_len_chk.s.minlen = VLAN_ETH_ZLEN;
 272                        frm_len_chk.s.maxlen = max_packet;
 273                        cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
 274                                       frm_len_chk.u64);
 275                }
 276                /*
 277                 * Set the hardware to truncate packets larger than
 278                 * the MTU. The jabber register must be set to a
 279                 * multiple of 8 bytes, so round up.
 280                 */
 281                cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
 282                               (max_packet + 7) & ~7u);
 283        }
 284        return 0;
 285}
 286
 287/**
 288 * cvm_oct_common_set_multicast_list - set the multicast list
 289 * @dev:    Device to work on
 290 */
 291static void cvm_oct_common_set_multicast_list(struct net_device *dev)
 292{
 293        union cvmx_gmxx_prtx_cfg gmx_cfg;
 294        struct octeon_ethernet *priv = netdev_priv(dev);
 295        int interface = INTERFACE(priv->port);
 296
 297        if ((interface < 2) &&
 298            (cvmx_helper_interface_get_mode(interface) !=
 299                CVMX_HELPER_INTERFACE_MODE_SPI)) {
 300                union cvmx_gmxx_rxx_adr_ctl control;
 301                int index = INDEX(priv->port);
 302
 303                control.u64 = 0;
 304                control.s.bcst = 1;     /* Allow broadcast MAC addresses */
 305
 306                if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
 307                    (dev->flags & IFF_PROMISC))
 308                        /* Force accept multicast packets */
 309                        control.s.mcst = 2;
 310                else
 311                        /* Force reject multicast packets */
 312                        control.s.mcst = 1;
 313
 314                if (dev->flags & IFF_PROMISC)
 315                        /*
 316                         * Reject matches if promisc. Since CAM is
 317                         * shut off, should accept everything.
 318                         */
 319                        control.s.cam_mode = 0;
 320                else
 321                        /* Filter packets based on the CAM */
 322                        control.s.cam_mode = 1;
 323
 324                gmx_cfg.u64 =
 325                    cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 326                cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 327                               gmx_cfg.u64 & ~1ull);
 328
 329                cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
 330                               control.u64);
 331                if (dev->flags & IFF_PROMISC)
 332                        cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 333                                       (index, interface), 0);
 334                else
 335                        cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
 336                                       (index, interface), 1);
 337
 338                cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 339                               gmx_cfg.u64);
 340        }
 341}
 342
 343static int cvm_oct_set_mac_filter(struct net_device *dev)
 344{
 345        struct octeon_ethernet *priv = netdev_priv(dev);
 346        union cvmx_gmxx_prtx_cfg gmx_cfg;
 347        int interface = INTERFACE(priv->port);
 348
 349        if ((interface < 2) &&
 350            (cvmx_helper_interface_get_mode(interface) !=
 351                CVMX_HELPER_INTERFACE_MODE_SPI)) {
 352                int i;
 353                u8 *ptr = dev->dev_addr;
 354                u64 mac = 0;
 355                int index = INDEX(priv->port);
 356
 357                for (i = 0; i < 6; i++)
 358                        mac = (mac << 8) | (u64)ptr[i];
 359
 360                gmx_cfg.u64 =
 361                    cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 362                cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 363                               gmx_cfg.u64 & ~1ull);
 364
 365                cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
 366                cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
 367                               ptr[0]);
 368                cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
 369                               ptr[1]);
 370                cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
 371                               ptr[2]);
 372                cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
 373                               ptr[3]);
 374                cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
 375                               ptr[4]);
 376                cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
 377                               ptr[5]);
 378                cvm_oct_common_set_multicast_list(dev);
 379                cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
 380                               gmx_cfg.u64);
 381        }
 382        return 0;
 383}
 384
 385/**
 386 * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
 387 * @dev:    The device in question.
 388 * @addr:   Socket address.
 389 *
 390 * Returns Zero on success
 391 */
 392static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
 393{
 394        int r = eth_mac_addr(dev, addr);
 395
 396        if (r)
 397                return r;
 398        return cvm_oct_set_mac_filter(dev);
 399}
 400
 401/**
 402 * cvm_oct_common_init - per network device initialization
 403 * @dev:    Device to initialize
 404 *
 405 * Returns Zero on success
 406 */
 407int cvm_oct_common_init(struct net_device *dev)
 408{
 409        struct octeon_ethernet *priv = netdev_priv(dev);
 410        int ret;
 411
 412        ret = of_get_mac_address(priv->of_node, dev->dev_addr);
 413        if (ret)
 414                eth_hw_addr_random(dev);
 415
 416        /*
 417         * Force the interface to use the POW send if always_use_pow
 418         * was specified or it is in the pow send list.
 419         */
 420        if ((pow_send_group != -1) &&
 421            (always_use_pow || strstr(pow_send_list, dev->name)))
 422                priv->queue = -1;
 423
 424        if (priv->queue != -1)
 425                dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
 426
 427        /* We do our own locking, Linux doesn't need to */
 428        dev->features |= NETIF_F_LLTX;
 429        dev->ethtool_ops = &cvm_oct_ethtool_ops;
 430
 431        cvm_oct_set_mac_filter(dev);
 432        dev_set_mtu(dev, dev->mtu);
 433
 434        /*
 435         * Zero out stats for port so we won't mistakenly show
 436         * counters from the bootloader.
 437         */
 438        memset(dev->netdev_ops->ndo_get_stats(dev), 0,
 439               sizeof(struct net_device_stats));
 440
 441        if (dev->netdev_ops->ndo_stop)
 442                dev->netdev_ops->ndo_stop(dev);
 443
 444        return 0;
 445}
 446
 447void cvm_oct_common_uninit(struct net_device *dev)
 448{
 449        if (dev->phydev)
 450                phy_disconnect(dev->phydev);
 451}
 452
 453int cvm_oct_common_open(struct net_device *dev,
 454                        void (*link_poll)(struct net_device *))
 455{
 456        union cvmx_gmxx_prtx_cfg gmx_cfg;
 457        struct octeon_ethernet *priv = netdev_priv(dev);
 458        int interface = INTERFACE(priv->port);
 459        int index = INDEX(priv->port);
 460        union cvmx_helper_link_info link_info;
 461        int rv;
 462
 463        rv = cvm_oct_phy_setup_device(dev);
 464        if (rv)
 465                return rv;
 466
 467        gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 468        gmx_cfg.s.en = 1;
 469        if (octeon_has_feature(OCTEON_FEATURE_PKND))
 470                gmx_cfg.s.pknd = priv->port;
 471        cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
 472
 473        if (octeon_is_simulation())
 474                return 0;
 475
 476        if (dev->phydev) {
 477                int r = phy_read_status(dev->phydev);
 478
 479                if (r == 0 && dev->phydev->link == 0)
 480                        netif_carrier_off(dev);
 481                cvm_oct_adjust_link(dev);
 482        } else {
 483                link_info = cvmx_helper_link_get(priv->port);
 484                if (!link_info.s.link_up)
 485                        netif_carrier_off(dev);
 486                priv->poll = link_poll;
 487                link_poll(dev);
 488        }
 489
 490        return 0;
 491}
 492
 493void cvm_oct_link_poll(struct net_device *dev)
 494{
 495        struct octeon_ethernet *priv = netdev_priv(dev);
 496        union cvmx_helper_link_info link_info;
 497
 498        link_info = cvmx_helper_link_get(priv->port);
 499        if (link_info.u64 == priv->link_info)
 500                return;
 501
 502        if (cvmx_helper_link_set(priv->port, link_info))
 503                link_info.u64 = priv->link_info;
 504        else
 505                priv->link_info = link_info.u64;
 506
 507        if (link_info.s.link_up) {
 508                if (!netif_carrier_ok(dev))
 509                        netif_carrier_on(dev);
 510        } else if (netif_carrier_ok(dev)) {
 511                netif_carrier_off(dev);
 512        }
 513        cvm_oct_note_carrier(priv, link_info);
 514}
 515
 516static int cvm_oct_xaui_open(struct net_device *dev)
 517{
 518        return cvm_oct_common_open(dev, cvm_oct_link_poll);
 519}
 520
 521static const struct net_device_ops cvm_oct_npi_netdev_ops = {
 522        .ndo_init               = cvm_oct_common_init,
 523        .ndo_uninit             = cvm_oct_common_uninit,
 524        .ndo_start_xmit         = cvm_oct_xmit,
 525        .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 526        .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 527        .ndo_do_ioctl           = cvm_oct_ioctl,
 528        .ndo_change_mtu         = cvm_oct_common_change_mtu,
 529        .ndo_get_stats          = cvm_oct_common_get_stats,
 530#ifdef CONFIG_NET_POLL_CONTROLLER
 531        .ndo_poll_controller    = cvm_oct_poll_controller,
 532#endif
 533};
 534
 535static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
 536        .ndo_init               = cvm_oct_common_init,
 537        .ndo_uninit             = cvm_oct_common_uninit,
 538        .ndo_open               = cvm_oct_xaui_open,
 539        .ndo_stop               = cvm_oct_common_stop,
 540        .ndo_start_xmit         = cvm_oct_xmit,
 541        .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 542        .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 543        .ndo_do_ioctl           = cvm_oct_ioctl,
 544        .ndo_change_mtu         = cvm_oct_common_change_mtu,
 545        .ndo_get_stats          = cvm_oct_common_get_stats,
 546#ifdef CONFIG_NET_POLL_CONTROLLER
 547        .ndo_poll_controller    = cvm_oct_poll_controller,
 548#endif
 549};
 550
 551static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
 552        .ndo_init               = cvm_oct_sgmii_init,
 553        .ndo_uninit             = cvm_oct_common_uninit,
 554        .ndo_open               = cvm_oct_sgmii_open,
 555        .ndo_stop               = cvm_oct_common_stop,
 556        .ndo_start_xmit         = cvm_oct_xmit,
 557        .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 558        .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 559        .ndo_do_ioctl           = cvm_oct_ioctl,
 560        .ndo_change_mtu         = cvm_oct_common_change_mtu,
 561        .ndo_get_stats          = cvm_oct_common_get_stats,
 562#ifdef CONFIG_NET_POLL_CONTROLLER
 563        .ndo_poll_controller    = cvm_oct_poll_controller,
 564#endif
 565};
 566
 567static const struct net_device_ops cvm_oct_spi_netdev_ops = {
 568        .ndo_init               = cvm_oct_spi_init,
 569        .ndo_uninit             = cvm_oct_spi_uninit,
 570        .ndo_start_xmit         = cvm_oct_xmit,
 571        .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 572        .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 573        .ndo_do_ioctl           = cvm_oct_ioctl,
 574        .ndo_change_mtu         = cvm_oct_common_change_mtu,
 575        .ndo_get_stats          = cvm_oct_common_get_stats,
 576#ifdef CONFIG_NET_POLL_CONTROLLER
 577        .ndo_poll_controller    = cvm_oct_poll_controller,
 578#endif
 579};
 580
 581static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
 582        .ndo_init               = cvm_oct_common_init,
 583        .ndo_uninit             = cvm_oct_common_uninit,
 584        .ndo_open               = cvm_oct_rgmii_open,
 585        .ndo_stop               = cvm_oct_common_stop,
 586        .ndo_start_xmit         = cvm_oct_xmit,
 587        .ndo_set_rx_mode        = cvm_oct_common_set_multicast_list,
 588        .ndo_set_mac_address    = cvm_oct_common_set_mac_address,
 589        .ndo_do_ioctl           = cvm_oct_ioctl,
 590        .ndo_change_mtu         = cvm_oct_common_change_mtu,
 591        .ndo_get_stats          = cvm_oct_common_get_stats,
 592#ifdef CONFIG_NET_POLL_CONTROLLER
 593        .ndo_poll_controller    = cvm_oct_poll_controller,
 594#endif
 595};
 596
 597static const struct net_device_ops cvm_oct_pow_netdev_ops = {
 598        .ndo_init               = cvm_oct_common_init,
 599        .ndo_start_xmit         = cvm_oct_xmit_pow,
 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
 610static struct device_node *cvm_oct_of_get_child
 611                                (const struct device_node *parent, int reg_val)
 612{
 613        struct device_node *node;
 614        const __be32 *addr;
 615        int size;
 616
 617        for_each_child_of_node(parent, node) {
 618                addr = of_get_property(node, "reg", &size);
 619                if (addr && (be32_to_cpu(*addr) == reg_val))
 620                        break;
 621        }
 622        return node;
 623}
 624
 625static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
 626                                                 int interface, int port)
 627{
 628        struct device_node *ni, *np;
 629
 630        ni = cvm_oct_of_get_child(pip, interface);
 631        if (!ni)
 632                return NULL;
 633
 634        np = cvm_oct_of_get_child(ni, port);
 635        of_node_put(ni);
 636
 637        return np;
 638}
 639
 640static void cvm_set_rgmii_delay(struct octeon_ethernet *priv, int iface,
 641                                int port)
 642{
 643        struct device_node *np = priv->of_node;
 644        u32 delay_value;
 645        bool rx_delay;
 646        bool tx_delay;
 647
 648        /* By default, both RX/TX delay is enabled in
 649         * __cvmx_helper_rgmii_enable().
 650         */
 651        rx_delay = true;
 652        tx_delay = true;
 653
 654        if (!of_property_read_u32(np, "rx-delay", &delay_value)) {
 655                cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, iface), delay_value);
 656                rx_delay = delay_value > 0;
 657        }
 658        if (!of_property_read_u32(np, "tx-delay", &delay_value)) {
 659                cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, iface), delay_value);
 660                tx_delay = delay_value > 0;
 661        }
 662
 663        if (!rx_delay && !tx_delay)
 664                priv->phy_mode = PHY_INTERFACE_MODE_RGMII_ID;
 665        else if (!rx_delay)
 666                priv->phy_mode = PHY_INTERFACE_MODE_RGMII_RXID;
 667        else if (!tx_delay)
 668                priv->phy_mode = PHY_INTERFACE_MODE_RGMII_TXID;
 669        else
 670                priv->phy_mode = PHY_INTERFACE_MODE_RGMII;
 671}
 672
 673static 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        int mtu_overhead = ETH_HLEN + ETH_FCS_LEN;
 681
 682#if IS_ENABLED(CONFIG_VLAN_8021Q)
 683        mtu_overhead += VLAN_HLEN;
 684#endif
 685
 686        pip = pdev->dev.of_node;
 687        if (!pip) {
 688                pr_err("Error: No 'pip' in /aliases\n");
 689                return -EINVAL;
 690        }
 691
 692        cvm_oct_configure_common_hw();
 693
 694        cvmx_helper_initialize_packet_io_global();
 695
 696        if (receive_group_order) {
 697                if (receive_group_order > 4)
 698                        receive_group_order = 4;
 699                pow_receive_groups = (1 << (1 << receive_group_order)) - 1;
 700        } else {
 701                pow_receive_groups = BIT(pow_receive_group);
 702        }
 703
 704        /* Change the input group for all ports before input is enabled */
 705        num_interfaces = cvmx_helper_get_number_of_interfaces();
 706        for (interface = 0; interface < num_interfaces; interface++) {
 707                int num_ports = cvmx_helper_ports_on_interface(interface);
 708                int port;
 709
 710                for (port = cvmx_helper_get_ipd_port(interface, 0);
 711                     port < cvmx_helper_get_ipd_port(interface, num_ports);
 712                     port++) {
 713                        union cvmx_pip_prt_tagx pip_prt_tagx;
 714
 715                        pip_prt_tagx.u64 =
 716                            cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
 717
 718                        if (receive_group_order) {
 719                                int tag_mask;
 720
 721                                /* We support only 16 groups at the moment, so
 722                                 * always disable the two additional "hidden"
 723                                 * tag_mask bits on CN68XX.
 724                                 */
 725                                if (OCTEON_IS_MODEL(OCTEON_CN68XX))
 726                                        pip_prt_tagx.u64 |= 0x3ull << 44;
 727
 728                                tag_mask = ~((1 << receive_group_order) - 1);
 729                                pip_prt_tagx.s.grptagbase       = 0;
 730                                pip_prt_tagx.s.grptagmask       = tag_mask;
 731                                pip_prt_tagx.s.grptag           = 1;
 732                                pip_prt_tagx.s.tag_mode         = 0;
 733                                pip_prt_tagx.s.inc_prt_flag     = 1;
 734                                pip_prt_tagx.s.ip6_dprt_flag    = 1;
 735                                pip_prt_tagx.s.ip4_dprt_flag    = 1;
 736                                pip_prt_tagx.s.ip6_sprt_flag    = 1;
 737                                pip_prt_tagx.s.ip4_sprt_flag    = 1;
 738                                pip_prt_tagx.s.ip6_dst_flag     = 1;
 739                                pip_prt_tagx.s.ip4_dst_flag     = 1;
 740                                pip_prt_tagx.s.ip6_src_flag     = 1;
 741                                pip_prt_tagx.s.ip4_src_flag     = 1;
 742                                pip_prt_tagx.s.grp              = 0;
 743                        } else {
 744                                pip_prt_tagx.s.grptag   = 0;
 745                                pip_prt_tagx.s.grp      = pow_receive_group;
 746                        }
 747
 748                        cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
 749                                       pip_prt_tagx.u64);
 750                }
 751        }
 752
 753        cvmx_helper_ipd_and_packet_input_enable();
 754
 755        memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
 756
 757        /*
 758         * Initialize the FAU used for counting packet buffers that
 759         * need to be freed.
 760         */
 761        cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
 762
 763        /* Initialize the FAU used for counting tx SKBs that need to be freed */
 764        cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
 765
 766        if ((pow_send_group != -1)) {
 767                struct net_device *dev;
 768
 769                dev = alloc_etherdev(sizeof(struct octeon_ethernet));
 770                if (dev) {
 771                        /* Initialize the device private structure. */
 772                        struct octeon_ethernet *priv = netdev_priv(dev);
 773
 774                        SET_NETDEV_DEV(dev, &pdev->dev);
 775                        dev->netdev_ops = &cvm_oct_pow_netdev_ops;
 776                        priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
 777                        priv->port = CVMX_PIP_NUM_INPUT_PORTS;
 778                        priv->queue = -1;
 779                        strscpy(dev->name, "pow%d", sizeof(dev->name));
 780                        for (qos = 0; qos < 16; qos++)
 781                                skb_queue_head_init(&priv->tx_free_list[qos]);
 782                        dev->min_mtu = VLAN_ETH_ZLEN - mtu_overhead;
 783                        dev->max_mtu = OCTEON_MAX_MTU - mtu_overhead;
 784
 785                        if (register_netdev(dev) < 0) {
 786                                pr_err("Failed to register ethernet device for POW\n");
 787                                free_netdev(dev);
 788                        } else {
 789                                cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
 790                                pr_info("%s: POW send group %d, receive group %d\n",
 791                                        dev->name, pow_send_group,
 792                                        pow_receive_group);
 793                        }
 794                } else {
 795                        pr_err("Failed to allocate ethernet device for POW\n");
 796                }
 797        }
 798
 799        num_interfaces = cvmx_helper_get_number_of_interfaces();
 800        for (interface = 0; interface < num_interfaces; interface++) {
 801                cvmx_helper_interface_mode_t imode =
 802                    cvmx_helper_interface_get_mode(interface);
 803                int num_ports = cvmx_helper_ports_on_interface(interface);
 804                int port;
 805                int port_index;
 806
 807                for (port_index = 0,
 808                     port = cvmx_helper_get_ipd_port(interface, 0);
 809                     port < cvmx_helper_get_ipd_port(interface, num_ports);
 810                     port_index++, port++) {
 811                        struct octeon_ethernet *priv;
 812                        struct net_device *dev =
 813                            alloc_etherdev(sizeof(struct octeon_ethernet));
 814                        if (!dev) {
 815                                pr_err("Failed to allocate ethernet device for port %d\n",
 816                                       port);
 817                                continue;
 818                        }
 819
 820                        /* Initialize the device private structure. */
 821                        SET_NETDEV_DEV(dev, &pdev->dev);
 822                        priv = netdev_priv(dev);
 823                        priv->netdev = dev;
 824                        priv->of_node = cvm_oct_node_for_port(pip, interface,
 825                                                              port_index);
 826
 827                        INIT_DELAYED_WORK(&priv->port_periodic_work,
 828                                          cvm_oct_periodic_worker);
 829                        priv->imode = imode;
 830                        priv->port = port;
 831                        priv->queue = cvmx_pko_get_base_queue(priv->port);
 832                        priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
 833                        priv->phy_mode = PHY_INTERFACE_MODE_NA;
 834                        for (qos = 0; qos < 16; qos++)
 835                                skb_queue_head_init(&priv->tx_free_list[qos]);
 836                        for (qos = 0; qos < cvmx_pko_get_num_queues(port);
 837                             qos++)
 838                                cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
 839                        dev->min_mtu = VLAN_ETH_ZLEN - mtu_overhead;
 840                        dev->max_mtu = OCTEON_MAX_MTU - mtu_overhead;
 841
 842                        switch (priv->imode) {
 843                        /* These types don't support ports to IPD/PKO */
 844                        case CVMX_HELPER_INTERFACE_MODE_DISABLED:
 845                        case CVMX_HELPER_INTERFACE_MODE_PCIE:
 846                        case CVMX_HELPER_INTERFACE_MODE_PICMG:
 847                                break;
 848
 849                        case CVMX_HELPER_INTERFACE_MODE_NPI:
 850                                dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 851                                strscpy(dev->name, "npi%d", sizeof(dev->name));
 852                                break;
 853
 854                        case CVMX_HELPER_INTERFACE_MODE_XAUI:
 855                                dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
 856                                strscpy(dev->name, "xaui%d", sizeof(dev->name));
 857                                break;
 858
 859                        case CVMX_HELPER_INTERFACE_MODE_LOOP:
 860                                dev->netdev_ops = &cvm_oct_npi_netdev_ops;
 861                                strscpy(dev->name, "loop%d", sizeof(dev->name));
 862                                break;
 863
 864                        case CVMX_HELPER_INTERFACE_MODE_SGMII:
 865                                priv->phy_mode = PHY_INTERFACE_MODE_SGMII;
 866                                dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
 867                                strscpy(dev->name, "eth%d", sizeof(dev->name));
 868                                break;
 869
 870                        case CVMX_HELPER_INTERFACE_MODE_SPI:
 871                                dev->netdev_ops = &cvm_oct_spi_netdev_ops;
 872                                strscpy(dev->name, "spi%d", sizeof(dev->name));
 873                                break;
 874
 875                        case CVMX_HELPER_INTERFACE_MODE_GMII:
 876                                priv->phy_mode = PHY_INTERFACE_MODE_GMII;
 877                                dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 878                                strscpy(dev->name, "eth%d", sizeof(dev->name));
 879                                break;
 880
 881                        case CVMX_HELPER_INTERFACE_MODE_RGMII:
 882                                dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
 883                                strscpy(dev->name, "eth%d", sizeof(dev->name));
 884                                cvm_set_rgmii_delay(priv, interface,
 885                                                    port_index);
 886                                break;
 887                        }
 888
 889                        if (priv->of_node && of_phy_is_fixed_link(priv->of_node)) {
 890                                if (of_phy_register_fixed_link(priv->of_node)) {
 891                                        netdev_err(dev, "Failed to register fixed link for interface %d, port %d\n",
 892                                                   interface, priv->port);
 893                                        dev->netdev_ops = NULL;
 894                                }
 895                        }
 896
 897                        if (!dev->netdev_ops) {
 898                                free_netdev(dev);
 899                        } else if (register_netdev(dev) < 0) {
 900                                pr_err("Failed to register ethernet device for interface %d, port %d\n",
 901                                       interface, priv->port);
 902                                free_netdev(dev);
 903                        } else {
 904                                cvm_oct_device[priv->port] = dev;
 905                                fau -=
 906                                    cvmx_pko_get_num_queues(priv->port) *
 907                                    sizeof(u32);
 908                                schedule_delayed_work(&priv->port_periodic_work,
 909                                                      HZ);
 910                        }
 911                }
 912        }
 913
 914        cvm_oct_tx_initialize();
 915        cvm_oct_rx_initialize();
 916
 917        /*
 918         * 150 uS: about 10 1500-byte packets at 1GE.
 919         */
 920        cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
 921
 922        schedule_delayed_work(&cvm_oct_rx_refill_work, HZ);
 923
 924        return 0;
 925}
 926
 927static int cvm_oct_remove(struct platform_device *pdev)
 928{
 929        int port;
 930
 931        cvmx_ipd_disable();
 932
 933        atomic_inc_return(&cvm_oct_poll_queue_stopping);
 934        cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
 935
 936        cvm_oct_rx_shutdown();
 937        cvm_oct_tx_shutdown();
 938
 939        cvmx_pko_disable();
 940
 941        /* Free the ethernet devices */
 942        for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
 943                if (cvm_oct_device[port]) {
 944                        struct net_device *dev = cvm_oct_device[port];
 945                        struct octeon_ethernet *priv = netdev_priv(dev);
 946
 947                        cancel_delayed_work_sync(&priv->port_periodic_work);
 948
 949                        cvm_oct_tx_shutdown_dev(dev);
 950                        unregister_netdev(dev);
 951                        free_netdev(dev);
 952                        cvm_oct_device[port] = NULL;
 953                }
 954        }
 955
 956        cvmx_pko_shutdown();
 957
 958        cvmx_ipd_free_ptr();
 959
 960        /* Free the HW pools */
 961        cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
 962                              num_packet_buffers);
 963        cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
 964                              num_packet_buffers);
 965        if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
 966                cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
 967                                      CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
 968        return 0;
 969}
 970
 971static const struct of_device_id cvm_oct_match[] = {
 972        {
 973                .compatible = "cavium,octeon-3860-pip",
 974        },
 975        {},
 976};
 977MODULE_DEVICE_TABLE(of, cvm_oct_match);
 978
 979static struct platform_driver cvm_oct_driver = {
 980        .probe          = cvm_oct_probe,
 981        .remove         = cvm_oct_remove,
 982        .driver         = {
 983                .name   = KBUILD_MODNAME,
 984                .of_match_table = cvm_oct_match,
 985        },
 986};
 987
 988module_platform_driver(cvm_oct_driver);
 989
 990MODULE_SOFTDEP("pre: mdio-cavium");
 991MODULE_LICENSE("GPL");
 992MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
 993MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");
 994