LXR linux/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Copyright (C) 1999 - 2010 Intel Corporation.
   4 * Copyright (C) 2010 OKI SEMICONDUCTOR Co., LTD.
   5 *
   6 * This code was derived from the Intel e1000e Linux driver.
   7 */
   8#include "pch_gbe.h"
   9#include "pch_gbe_phy.h"
  10
  11/**
  12 * pch_gbe_stats - Stats item information
  13 */
  14struct pch_gbe_stats {
  15        char string[ETH_GSTRING_LEN];
  16        size_t size;
  17        size_t offset;
  18};
  19
  20#define PCH_GBE_STAT(m)                                         \
  21{                                                               \
  22        .string = #m,                                           \
  23        .size = sizeof_field(struct pch_gbe_hw_stats, m),       \
  24        .offset = offsetof(struct pch_gbe_hw_stats, m),         \
  25}
  26
  27/**
  28 * pch_gbe_gstrings_stats - ethtool information status name list
  29 */
  30static const struct pch_gbe_stats pch_gbe_gstrings_stats[] = {
  31        PCH_GBE_STAT(rx_packets),
  32        PCH_GBE_STAT(tx_packets),
  33        PCH_GBE_STAT(rx_bytes),
  34        PCH_GBE_STAT(tx_bytes),
  35        PCH_GBE_STAT(rx_errors),
  36        PCH_GBE_STAT(tx_errors),
  37        PCH_GBE_STAT(rx_dropped),
  38        PCH_GBE_STAT(tx_dropped),
  39        PCH_GBE_STAT(multicast),
  40        PCH_GBE_STAT(collisions),
  41        PCH_GBE_STAT(rx_crc_errors),
  42        PCH_GBE_STAT(rx_frame_errors),
  43        PCH_GBE_STAT(rx_alloc_buff_failed),
  44        PCH_GBE_STAT(tx_length_errors),
  45        PCH_GBE_STAT(tx_aborted_errors),
  46        PCH_GBE_STAT(tx_carrier_errors),
  47        PCH_GBE_STAT(tx_timeout_count),
  48        PCH_GBE_STAT(tx_restart_count),
  49        PCH_GBE_STAT(intr_rx_dsc_empty_count),
  50        PCH_GBE_STAT(intr_rx_frame_err_count),
  51        PCH_GBE_STAT(intr_rx_fifo_err_count),
  52        PCH_GBE_STAT(intr_rx_dma_err_count),
  53        PCH_GBE_STAT(intr_tx_fifo_err_count),
  54        PCH_GBE_STAT(intr_tx_dma_err_count),
  55        PCH_GBE_STAT(intr_tcpip_err_count)
  56};
  57
  58#define PCH_GBE_QUEUE_STATS_LEN 0
  59#define PCH_GBE_GLOBAL_STATS_LEN        ARRAY_SIZE(pch_gbe_gstrings_stats)
  60#define PCH_GBE_STATS_LEN (PCH_GBE_GLOBAL_STATS_LEN + PCH_GBE_QUEUE_STATS_LEN)
  61
  62#define PCH_GBE_MAC_REGS_LEN    (sizeof(struct pch_gbe_regs) / 4)
  63#define PCH_GBE_REGS_LEN        (PCH_GBE_MAC_REGS_LEN + PCH_GBE_PHY_REGS_LEN)
  64/**
  65 * pch_gbe_get_link_ksettings - Get device-specific settings
  66 * @netdev: Network interface device structure
  67 * @ecmd:   Ethtool command
  68 * Returns:
  69 *      0:                      Successful.
  70 *      Negative value:         Failed.
  71 */
  72static int pch_gbe_get_link_ksettings(struct net_device *netdev,
  73                                      struct ethtool_link_ksettings *ecmd)
  74{
  75        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
  76        u32 supported, advertising;
  77
  78        mii_ethtool_get_link_ksettings(&adapter->mii, ecmd);
  79
  80        ethtool_convert_link_mode_to_legacy_u32(&supported,
  81                                                ecmd->link_modes.supported);
  82        ethtool_convert_link_mode_to_legacy_u32(&advertising,
  83                                                ecmd->link_modes.advertising);
  84
  85        supported &= ~(SUPPORTED_TP | SUPPORTED_1000baseT_Half);
  86        advertising &= ~(ADVERTISED_TP | ADVERTISED_1000baseT_Half);
  87
  88        ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
  89                                                supported);
  90        ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.advertising,
  91                                                advertising);
  92
  93        if (!netif_carrier_ok(adapter->netdev))
  94                ecmd->base.speed = SPEED_UNKNOWN;
  95
  96        return 0;
  97}
  98
  99/**
 100 * pch_gbe_set_link_ksettings - Set device-specific settings
 101 * @netdev: Network interface device structure
 102 * @ecmd:   Ethtool command
 103 * Returns:
 104 *      0:                      Successful.
 105 *      Negative value:         Failed.
 106 */
 107static int pch_gbe_set_link_ksettings(struct net_device *netdev,
 108                                      const struct ethtool_link_ksettings *ecmd)
 109{
 110        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 111        struct pch_gbe_hw *hw = &adapter->hw;
 112        struct ethtool_link_ksettings copy_ecmd;
 113        u32 speed = ecmd->base.speed;
 114        u32 advertising;
 115        int ret;
 116
 117        pch_gbe_phy_write_reg_miic(hw, MII_BMCR, BMCR_RESET);
 118
 119        memcpy(&copy_ecmd, ecmd, sizeof(*ecmd));
 120
 121        /* when set_settings() is called with a ethtool_cmd previously
 122         * filled by get_settings() on a down link, speed is -1: */
 123        if (speed == UINT_MAX) {
 124                speed = SPEED_1000;
 125                copy_ecmd.base.speed = speed;
 126                copy_ecmd.base.duplex = DUPLEX_FULL;
 127        }
 128        ret = mii_ethtool_set_link_ksettings(&adapter->mii, &copy_ecmd);
 129        if (ret) {
 130                netdev_err(netdev, "Error: mii_ethtool_set_link_ksettings\n");
 131                return ret;
 132        }
 133        hw->mac.link_speed = speed;
 134        hw->mac.link_duplex = copy_ecmd.base.duplex;
 135        ethtool_convert_link_mode_to_legacy_u32(
 136                &advertising, copy_ecmd.link_modes.advertising);
 137        hw->phy.autoneg_advertised = advertising;
 138        hw->mac.autoneg = copy_ecmd.base.autoneg;
 139
 140        /* reset the link */
 141        if (netif_running(adapter->netdev)) {
 142                pch_gbe_down(adapter);
 143                ret = pch_gbe_up(adapter);
 144        } else {
 145                pch_gbe_reset(adapter);
 146        }
 147        return ret;
 148}
 149
 150/**
 151 * pch_gbe_get_regs_len - Report the size of device registers
 152 * @netdev: Network interface device structure
 153 * Returns: the size of device registers.
 154 */
 155static int pch_gbe_get_regs_len(struct net_device *netdev)
 156{
 157        return PCH_GBE_REGS_LEN * (int)sizeof(u32);
 158}
 159
 160/**
 161 * pch_gbe_get_drvinfo - Report driver information
 162 * @netdev:  Network interface device structure
 163 * @drvinfo: Driver information structure
 164 */
 165static void pch_gbe_get_drvinfo(struct net_device *netdev,
 166                                 struct ethtool_drvinfo *drvinfo)
 167{
 168        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 169
 170        strlcpy(drvinfo->driver, KBUILD_MODNAME, sizeof(drvinfo->driver));
 171        strlcpy(drvinfo->version, pch_driver_version, sizeof(drvinfo->version));
 172        strlcpy(drvinfo->bus_info, pci_name(adapter->pdev),
 173                sizeof(drvinfo->bus_info));
 174}
 175
 176/**
 177 * pch_gbe_get_regs - Get device registers
 178 * @netdev: Network interface device structure
 179 * @regs:   Ethtool register structure
 180 * @p:      Buffer pointer of read device register date
 181 */
 182static void pch_gbe_get_regs(struct net_device *netdev,
 183                                struct ethtool_regs *regs, void *p)
 184{
 185        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 186        struct pch_gbe_hw *hw = &adapter->hw;
 187        struct pci_dev *pdev = adapter->pdev;
 188        u32 *regs_buff = p;
 189        u16 i, tmp;
 190
 191        regs->version = 0x1000000 | (__u32)pdev->revision << 16 | pdev->device;
 192        for (i = 0; i < PCH_GBE_MAC_REGS_LEN; i++)
 193                *regs_buff++ = ioread32(&hw->reg->INT_ST + i);
 194        /* PHY register */
 195        for (i = 0; i < PCH_GBE_PHY_REGS_LEN; i++) {
 196                pch_gbe_phy_read_reg_miic(&adapter->hw, i, &tmp);
 197                *regs_buff++ = tmp;
 198        }
 199}
 200
 201/**
 202 * pch_gbe_get_wol - Report whether Wake-on-Lan is enabled
 203 * @netdev: Network interface device structure
 204 * @wol:    Wake-on-Lan information
 205 */
 206static void pch_gbe_get_wol(struct net_device *netdev,
 207                                struct ethtool_wolinfo *wol)
 208{
 209        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 210
 211        wol->supported = WAKE_UCAST | WAKE_MCAST | WAKE_BCAST | WAKE_MAGIC;
 212        wol->wolopts = 0;
 213
 214        if ((adapter->wake_up_evt & PCH_GBE_WLC_IND))
 215                wol->wolopts |= WAKE_UCAST;
 216        if ((adapter->wake_up_evt & PCH_GBE_WLC_MLT))
 217                wol->wolopts |= WAKE_MCAST;
 218        if ((adapter->wake_up_evt & PCH_GBE_WLC_BR))
 219                wol->wolopts |= WAKE_BCAST;
 220        if ((adapter->wake_up_evt & PCH_GBE_WLC_MP))
 221                wol->wolopts |= WAKE_MAGIC;
 222}
 223
 224/**
 225 * pch_gbe_set_wol - Turn Wake-on-Lan on or off
 226 * @netdev: Network interface device structure
 227 * @wol:    Pointer of wake-on-Lan information straucture
 228 * Returns:
 229 *      0:                      Successful.
 230 *      Negative value:         Failed.
 231 */
 232static int pch_gbe_set_wol(struct net_device *netdev,
 233                                struct ethtool_wolinfo *wol)
 234{
 235        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 236
 237        if ((wol->wolopts & (WAKE_PHY | WAKE_ARP | WAKE_MAGICSECURE)))
 238                return -EOPNOTSUPP;
 239        /* these settings will always override what we currently have */
 240        adapter->wake_up_evt = 0;
 241
 242        if ((wol->wolopts & WAKE_UCAST))
 243                adapter->wake_up_evt |= PCH_GBE_WLC_IND;
 244        if ((wol->wolopts & WAKE_MCAST))
 245                adapter->wake_up_evt |= PCH_GBE_WLC_MLT;
 246        if ((wol->wolopts & WAKE_BCAST))
 247                adapter->wake_up_evt |= PCH_GBE_WLC_BR;
 248        if ((wol->wolopts & WAKE_MAGIC))
 249                adapter->wake_up_evt |= PCH_GBE_WLC_MP;
 250        return 0;
 251}
 252
 253/**
 254 * pch_gbe_nway_reset - Restart autonegotiation
 255 * @netdev: Network interface device structure
 256 * Returns:
 257 *      0:                      Successful.
 258 *      Negative value:         Failed.
 259 */
 260static int pch_gbe_nway_reset(struct net_device *netdev)
 261{
 262        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 263
 264        return mii_nway_restart(&adapter->mii);
 265}
 266
 267/**
 268 * pch_gbe_get_ringparam - Report ring sizes
 269 * @netdev:  Network interface device structure
 270 * @ring:    Ring param structure
 271 */
 272static void pch_gbe_get_ringparam(struct net_device *netdev,
 273                                        struct ethtool_ringparam *ring)
 274{
 275        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 276        struct pch_gbe_tx_ring *txdr = adapter->tx_ring;
 277        struct pch_gbe_rx_ring *rxdr = adapter->rx_ring;
 278
 279        ring->rx_max_pending = PCH_GBE_MAX_RXD;
 280        ring->tx_max_pending = PCH_GBE_MAX_TXD;
 281        ring->rx_pending = rxdr->count;
 282        ring->tx_pending = txdr->count;
 283}
 284
 285/**
 286 * pch_gbe_set_ringparam - Set ring sizes
 287 * @netdev:  Network interface device structure
 288 * @ring:    Ring param structure
 289 * Returns
 290 *      0:                      Successful.
 291 *      Negative value:         Failed.
 292 */
 293static int pch_gbe_set_ringparam(struct net_device *netdev,
 294                                        struct ethtool_ringparam *ring)
 295{
 296        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 297        struct pch_gbe_tx_ring *txdr, *tx_old;
 298        struct pch_gbe_rx_ring *rxdr, *rx_old;
 299        int tx_ring_size, rx_ring_size;
 300        int err = 0;
 301
 302        if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
 303                return -EINVAL;
 304        tx_ring_size = (int)sizeof(struct pch_gbe_tx_ring);
 305        rx_ring_size = (int)sizeof(struct pch_gbe_rx_ring);
 306
 307        if ((netif_running(adapter->netdev)))
 308                pch_gbe_down(adapter);
 309        tx_old = adapter->tx_ring;
 310        rx_old = adapter->rx_ring;
 311
 312        txdr = kzalloc(tx_ring_size, GFP_KERNEL);
 313        if (!txdr) {
 314                err = -ENOMEM;
 315                goto err_alloc_tx;
 316        }
 317        rxdr = kzalloc(rx_ring_size, GFP_KERNEL);
 318        if (!rxdr) {
 319                err = -ENOMEM;
 320                goto err_alloc_rx;
 321        }
 322        adapter->tx_ring = txdr;
 323        adapter->rx_ring = rxdr;
 324
 325        rxdr->count =
 326                clamp_val(ring->rx_pending, PCH_GBE_MIN_RXD, PCH_GBE_MAX_RXD);
 327        rxdr->count = roundup(rxdr->count, PCH_GBE_RX_DESC_MULTIPLE);
 328
 329        txdr->count =
 330                clamp_val(ring->tx_pending, PCH_GBE_MIN_RXD, PCH_GBE_MAX_RXD);
 331        txdr->count = roundup(txdr->count, PCH_GBE_TX_DESC_MULTIPLE);
 332
 333        if ((netif_running(adapter->netdev))) {
 334                /* Try to get new resources before deleting old */
 335                err = pch_gbe_setup_rx_resources(adapter, adapter->rx_ring);
 336                if (err)
 337                        goto err_setup_rx;
 338                err = pch_gbe_setup_tx_resources(adapter, adapter->tx_ring);
 339                if (err)
 340                        goto err_setup_tx;
 341                pch_gbe_free_rx_resources(adapter, rx_old);
 342                pch_gbe_free_tx_resources(adapter, tx_old);
 343                kfree(tx_old);
 344                kfree(rx_old);
 345                adapter->rx_ring = rxdr;
 346                adapter->tx_ring = txdr;
 347                err = pch_gbe_up(adapter);
 348        }
 349        return err;
 350
 351err_setup_tx:
 352        pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
 353err_setup_rx:
 354        adapter->rx_ring = rx_old;
 355        adapter->tx_ring = tx_old;
 356        kfree(rxdr);
 357err_alloc_rx:
 358        kfree(txdr);
 359err_alloc_tx:
 360        if (netif_running(adapter->netdev))
 361                pch_gbe_up(adapter);
 362        return err;
 363}
 364
 365/**
 366 * pch_gbe_get_pauseparam - Report pause parameters
 367 * @netdev:  Network interface device structure
 368 * @pause:   Pause parameters structure
 369 */
 370static void pch_gbe_get_pauseparam(struct net_device *netdev,
 371                                       struct ethtool_pauseparam *pause)
 372{
 373        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 374        struct pch_gbe_hw *hw = &adapter->hw;
 375
 376        pause->autoneg =
 377            ((hw->mac.fc_autoneg) ? AUTONEG_ENABLE : AUTONEG_DISABLE);
 378
 379        if (hw->mac.fc == PCH_GBE_FC_RX_PAUSE) {
 380                pause->rx_pause = 1;
 381        } else if (hw->mac.fc == PCH_GBE_FC_TX_PAUSE) {
 382                pause->tx_pause = 1;
 383        } else if (hw->mac.fc == PCH_GBE_FC_FULL) {
 384                pause->rx_pause = 1;
 385                pause->tx_pause = 1;
 386        }
 387}
 388
 389/**
 390 * pch_gbe_set_pauseparam - Set pause parameters
 391 * @netdev:  Network interface device structure
 392 * @pause:   Pause parameters structure
 393 * Returns:
 394 *      0:                      Successful.
 395 *      Negative value:         Failed.
 396 */
 397static int pch_gbe_set_pauseparam(struct net_device *netdev,
 398                                       struct ethtool_pauseparam *pause)
 399{
 400        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 401        struct pch_gbe_hw *hw = &adapter->hw;
 402        int ret = 0;
 403
 404        hw->mac.fc_autoneg = pause->autoneg;
 405        if ((pause->rx_pause) && (pause->tx_pause))
 406                hw->mac.fc = PCH_GBE_FC_FULL;
 407        else if ((pause->rx_pause) && (!pause->tx_pause))
 408                hw->mac.fc = PCH_GBE_FC_RX_PAUSE;
 409        else if ((!pause->rx_pause) && (pause->tx_pause))
 410                hw->mac.fc = PCH_GBE_FC_TX_PAUSE;
 411        else if ((!pause->rx_pause) && (!pause->tx_pause))
 412                hw->mac.fc = PCH_GBE_FC_NONE;
 413
 414        if (hw->mac.fc_autoneg == AUTONEG_ENABLE) {
 415                if ((netif_running(adapter->netdev))) {
 416                        pch_gbe_down(adapter);
 417                        ret = pch_gbe_up(adapter);
 418                } else {
 419                        pch_gbe_reset(adapter);
 420                }
 421        } else {
 422                ret = pch_gbe_mac_force_mac_fc(hw);
 423        }
 424        return ret;
 425}
 426
 427/**
 428 * pch_gbe_get_strings - Return a set of strings that describe the requested
 429 *                       objects
 430 * @netdev:    Network interface device structure
 431 * @stringset: Select the stringset. [ETH_SS_TEST] [ETH_SS_STATS]
 432 * @data:      Pointer of read string data.
 433 */
 434static void pch_gbe_get_strings(struct net_device *netdev, u32 stringset,
 435                                        u8 *data)
 436{
 437        u8 *p = data;
 438        int i;
 439
 440        switch (stringset) {
 441        case (u32) ETH_SS_STATS:
 442                for (i = 0; i < PCH_GBE_GLOBAL_STATS_LEN; i++) {
 443                        memcpy(p, pch_gbe_gstrings_stats[i].string,
 444                               ETH_GSTRING_LEN);
 445                        p += ETH_GSTRING_LEN;
 446                }
 447                break;
 448        }
 449}
 450
 451/**
 452 * pch_gbe_get_ethtool_stats - Return statistics about the device
 453 * @netdev: Network interface device structure
 454 * @stats:  Ethtool statue structure
 455 * @data:   Pointer of read status area
 456 */
 457static void pch_gbe_get_ethtool_stats(struct net_device *netdev,
 458                                  struct ethtool_stats *stats, u64 *data)
 459{
 460        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 461        int i;
 462        const struct pch_gbe_stats *gstats = pch_gbe_gstrings_stats;
 463        char *hw_stats = (char *)&adapter->stats;
 464
 465        pch_gbe_update_stats(adapter);
 466        for (i = 0; i < PCH_GBE_GLOBAL_STATS_LEN; i++) {
 467                char *p = hw_stats + gstats->offset;
 468                data[i] = gstats->size == sizeof(u64) ? *(u64 *)p:(*(u32 *)p);
 469                gstats++;
 470        }
 471}
 472
 473static int pch_gbe_get_sset_count(struct net_device *netdev, int sset)
 474{
 475        switch (sset) {
 476        case ETH_SS_STATS:
 477                return PCH_GBE_STATS_LEN;
 478        default:
 479                return -EOPNOTSUPP;
 480        }
 481}
 482
 483static const struct ethtool_ops pch_gbe_ethtool_ops = {
 484        .get_drvinfo = pch_gbe_get_drvinfo,
 485        .get_regs_len = pch_gbe_get_regs_len,
 486        .get_regs = pch_gbe_get_regs,
 487        .get_wol = pch_gbe_get_wol,
 488        .set_wol = pch_gbe_set_wol,
 489        .nway_reset = pch_gbe_nway_reset,
 490        .get_link = ethtool_op_get_link,
 491        .get_ringparam = pch_gbe_get_ringparam,
 492        .set_ringparam = pch_gbe_set_ringparam,
 493        .get_pauseparam = pch_gbe_get_pauseparam,
 494        .set_pauseparam = pch_gbe_set_pauseparam,
 495        .get_strings = pch_gbe_get_strings,
 496        .get_ethtool_stats = pch_gbe_get_ethtool_stats,
 497        .get_sset_count = pch_gbe_get_sset_count,
 498        .get_link_ksettings = pch_gbe_get_link_ksettings,
 499        .set_link_ksettings = pch_gbe_set_link_ksettings,
 500};
 501
 502void pch_gbe_set_ethtool_ops(struct net_device *netdev)
 503{
 504        netdev->ethtool_ops = &pch_gbe_ethtool_ops;
 505}
 506