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

   1/*
   2 * Copyright (C) 1999 - 2010 Intel Corporation.
   3 * Copyright (C) 2010 OKI SEMICONDUCTOR Co., LTD.
   4 *
   5 * This code was derived from the Intel e1000e Linux driver.
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation; version 2 of the License.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19#include "pch_gbe.h"
  20#include "pch_gbe_api.h"
  21
  22/**
  23 * pch_gbe_stats - Stats item information
  24 */
  25struct pch_gbe_stats {
  26        char string[ETH_GSTRING_LEN];
  27        size_t size;
  28        size_t offset;
  29};
  30
  31#define PCH_GBE_STAT(m)                                         \
  32{                                                               \
  33        .string = #m,                                           \
  34        .size = FIELD_SIZEOF(struct pch_gbe_hw_stats, m),       \
  35        .offset = offsetof(struct pch_gbe_hw_stats, m),         \
  36}
  37
  38/**
  39 * pch_gbe_gstrings_stats - ethtool information status name list
  40 */
  41static const struct pch_gbe_stats pch_gbe_gstrings_stats[] = {
  42        PCH_GBE_STAT(rx_packets),
  43        PCH_GBE_STAT(tx_packets),
  44        PCH_GBE_STAT(rx_bytes),
  45        PCH_GBE_STAT(tx_bytes),
  46        PCH_GBE_STAT(rx_errors),
  47        PCH_GBE_STAT(tx_errors),
  48        PCH_GBE_STAT(rx_dropped),
  49        PCH_GBE_STAT(tx_dropped),
  50        PCH_GBE_STAT(multicast),
  51        PCH_GBE_STAT(collisions),
  52        PCH_GBE_STAT(rx_crc_errors),
  53        PCH_GBE_STAT(rx_frame_errors),
  54        PCH_GBE_STAT(rx_alloc_buff_failed),
  55        PCH_GBE_STAT(tx_length_errors),
  56        PCH_GBE_STAT(tx_aborted_errors),
  57        PCH_GBE_STAT(tx_carrier_errors),
  58        PCH_GBE_STAT(tx_timeout_count),
  59        PCH_GBE_STAT(tx_restart_count),
  60        PCH_GBE_STAT(intr_rx_dsc_empty_count),
  61        PCH_GBE_STAT(intr_rx_frame_err_count),
  62        PCH_GBE_STAT(intr_rx_fifo_err_count),
  63        PCH_GBE_STAT(intr_rx_dma_err_count),
  64        PCH_GBE_STAT(intr_tx_fifo_err_count),
  65        PCH_GBE_STAT(intr_tx_dma_err_count),
  66        PCH_GBE_STAT(intr_tcpip_err_count)
  67};
  68
  69#define PCH_GBE_QUEUE_STATS_LEN 0
  70#define PCH_GBE_GLOBAL_STATS_LEN        ARRAY_SIZE(pch_gbe_gstrings_stats)
  71#define PCH_GBE_STATS_LEN (PCH_GBE_GLOBAL_STATS_LEN + PCH_GBE_QUEUE_STATS_LEN)
  72
  73#define PCH_GBE_MAC_REGS_LEN    (sizeof(struct pch_gbe_regs) / 4)
  74#define PCH_GBE_REGS_LEN        (PCH_GBE_MAC_REGS_LEN + PCH_GBE_PHY_REGS_LEN)
  75/**
  76 * pch_gbe_get_settings - Get device-specific settings
  77 * @netdev: Network interface device structure
  78 * @ecmd:   Ethtool command
  79 * Returns:
  80 *      0:                      Successful.
  81 *      Negative value:         Failed.
  82 */
  83static int pch_gbe_get_settings(struct net_device *netdev,
  84                                 struct ethtool_cmd *ecmd)
  85{
  86        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
  87        int ret;
  88
  89        ret = mii_ethtool_gset(&adapter->mii, ecmd);
  90        ecmd->supported &= ~(SUPPORTED_TP | SUPPORTED_1000baseT_Half);
  91        ecmd->advertising &= ~(ADVERTISED_TP | ADVERTISED_1000baseT_Half);
  92
  93        if (!netif_carrier_ok(adapter->netdev))
  94                ethtool_cmd_speed_set(ecmd, SPEED_UNKNOWN);
  95        return ret;
  96}
  97
  98/**
  99 * pch_gbe_set_settings - Set device-specific settings
 100 * @netdev: Network interface device structure
 101 * @ecmd:   Ethtool command
 102 * Returns:
 103 *      0:                      Successful.
 104 *      Negative value:         Failed.
 105 */
 106static int pch_gbe_set_settings(struct net_device *netdev,
 107                                 struct ethtool_cmd *ecmd)
 108{
 109        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 110        struct pch_gbe_hw *hw = &adapter->hw;
 111        u32 speed = ethtool_cmd_speed(ecmd);
 112        int ret;
 113
 114        pch_gbe_hal_write_phy_reg(hw, MII_BMCR, BMCR_RESET);
 115
 116        /* when set_settings() is called with a ethtool_cmd previously
 117         * filled by get_settings() on a down link, speed is -1: */
 118        if (speed == UINT_MAX) {
 119                speed = SPEED_1000;
 120                ethtool_cmd_speed_set(ecmd, speed);
 121                ecmd->duplex = DUPLEX_FULL;
 122        }
 123        ret = mii_ethtool_sset(&adapter->mii, ecmd);
 124        if (ret) {
 125                netdev_err(netdev, "Error: mii_ethtool_sset\n");
 126                return ret;
 127        }
 128        hw->mac.link_speed = speed;
 129        hw->mac.link_duplex = ecmd->duplex;
 130        hw->phy.autoneg_advertised = ecmd->advertising;
 131        hw->mac.autoneg = ecmd->autoneg;
 132
 133        /* reset the link */
 134        if (netif_running(adapter->netdev)) {
 135                pch_gbe_down(adapter);
 136                ret = pch_gbe_up(adapter);
 137        } else {
 138                pch_gbe_reset(adapter);
 139        }
 140        return ret;
 141}
 142
 143/**
 144 * pch_gbe_get_regs_len - Report the size of device registers
 145 * @netdev: Network interface device structure
 146 * Returns: the size of device registers.
 147 */
 148static int pch_gbe_get_regs_len(struct net_device *netdev)
 149{
 150        return PCH_GBE_REGS_LEN * (int)sizeof(u32);
 151}
 152
 153/**
 154 * pch_gbe_get_drvinfo - Report driver information
 155 * @netdev:  Network interface device structure
 156 * @drvinfo: Driver information structure
 157 */
 158static void pch_gbe_get_drvinfo(struct net_device *netdev,
 159                                 struct ethtool_drvinfo *drvinfo)
 160{
 161        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 162
 163        strlcpy(drvinfo->driver, KBUILD_MODNAME, sizeof(drvinfo->driver));
 164        strlcpy(drvinfo->version, pch_driver_version, sizeof(drvinfo->version));
 165        strlcpy(drvinfo->bus_info, pci_name(adapter->pdev),
 166                sizeof(drvinfo->bus_info));
 167}
 168
 169/**
 170 * pch_gbe_get_regs - Get device registers
 171 * @netdev: Network interface device structure
 172 * @regs:   Ethtool register structure
 173 * @p:      Buffer pointer of read device register date
 174 */
 175static void pch_gbe_get_regs(struct net_device *netdev,
 176                                struct ethtool_regs *regs, void *p)
 177{
 178        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 179        struct pch_gbe_hw *hw = &adapter->hw;
 180        struct pci_dev *pdev = adapter->pdev;
 181        u32 *regs_buff = p;
 182        u16 i, tmp;
 183
 184        regs->version = 0x1000000 | (__u32)pdev->revision << 16 | pdev->device;
 185        for (i = 0; i < PCH_GBE_MAC_REGS_LEN; i++)
 186                *regs_buff++ = ioread32(&hw->reg->INT_ST + i);
 187        /* PHY register */
 188        for (i = 0; i < PCH_GBE_PHY_REGS_LEN; i++) {
 189                pch_gbe_hal_read_phy_reg(&adapter->hw, i, &tmp);
 190                *regs_buff++ = tmp;
 191        }
 192}
 193
 194/**
 195 * pch_gbe_get_wol - Report whether Wake-on-Lan is enabled
 196 * @netdev: Network interface device structure
 197 * @wol:    Wake-on-Lan information
 198 */
 199static void pch_gbe_get_wol(struct net_device *netdev,
 200                                struct ethtool_wolinfo *wol)
 201{
 202        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 203
 204        wol->supported = WAKE_UCAST | WAKE_MCAST | WAKE_BCAST | WAKE_MAGIC;
 205        wol->wolopts = 0;
 206
 207        if ((adapter->wake_up_evt & PCH_GBE_WLC_IND))
 208                wol->wolopts |= WAKE_UCAST;
 209        if ((adapter->wake_up_evt & PCH_GBE_WLC_MLT))
 210                wol->wolopts |= WAKE_MCAST;
 211        if ((adapter->wake_up_evt & PCH_GBE_WLC_BR))
 212                wol->wolopts |= WAKE_BCAST;
 213        if ((adapter->wake_up_evt & PCH_GBE_WLC_MP))
 214                wol->wolopts |= WAKE_MAGIC;
 215}
 216
 217/**
 218 * pch_gbe_set_wol - Turn Wake-on-Lan on or off
 219 * @netdev: Network interface device structure
 220 * @wol:    Pointer of wake-on-Lan information straucture
 221 * Returns:
 222 *      0:                      Successful.
 223 *      Negative value:         Failed.
 224 */
 225static int pch_gbe_set_wol(struct net_device *netdev,
 226                                struct ethtool_wolinfo *wol)
 227{
 228        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 229
 230        if ((wol->wolopts & (WAKE_PHY | WAKE_ARP | WAKE_MAGICSECURE)))
 231                return -EOPNOTSUPP;
 232        /* these settings will always override what we currently have */
 233        adapter->wake_up_evt = 0;
 234
 235        if ((wol->wolopts & WAKE_UCAST))
 236                adapter->wake_up_evt |= PCH_GBE_WLC_IND;
 237        if ((wol->wolopts & WAKE_MCAST))
 238                adapter->wake_up_evt |= PCH_GBE_WLC_MLT;
 239        if ((wol->wolopts & WAKE_BCAST))
 240                adapter->wake_up_evt |= PCH_GBE_WLC_BR;
 241        if ((wol->wolopts & WAKE_MAGIC))
 242                adapter->wake_up_evt |= PCH_GBE_WLC_MP;
 243        return 0;
 244}
 245
 246/**
 247 * pch_gbe_nway_reset - Restart autonegotiation
 248 * @netdev: Network interface device structure
 249 * Returns:
 250 *      0:                      Successful.
 251 *      Negative value:         Failed.
 252 */
 253static int pch_gbe_nway_reset(struct net_device *netdev)
 254{
 255        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 256
 257        return mii_nway_restart(&adapter->mii);
 258}
 259
 260/**
 261 * pch_gbe_get_ringparam - Report ring sizes
 262 * @netdev:  Network interface device structure
 263 * @ring:    Ring param structure
 264 */
 265static void pch_gbe_get_ringparam(struct net_device *netdev,
 266                                        struct ethtool_ringparam *ring)
 267{
 268        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 269        struct pch_gbe_tx_ring *txdr = adapter->tx_ring;
 270        struct pch_gbe_rx_ring *rxdr = adapter->rx_ring;
 271
 272        ring->rx_max_pending = PCH_GBE_MAX_RXD;
 273        ring->tx_max_pending = PCH_GBE_MAX_TXD;
 274        ring->rx_pending = rxdr->count;
 275        ring->tx_pending = txdr->count;
 276}
 277
 278/**
 279 * pch_gbe_set_ringparam - Set ring sizes
 280 * @netdev:  Network interface device structure
 281 * @ring:    Ring param structure
 282 * Returns
 283 *      0:                      Successful.
 284 *      Negative value:         Failed.
 285 */
 286static int pch_gbe_set_ringparam(struct net_device *netdev,
 287                                        struct ethtool_ringparam *ring)
 288{
 289        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 290        struct pch_gbe_tx_ring *txdr, *tx_old;
 291        struct pch_gbe_rx_ring *rxdr, *rx_old;
 292        int tx_ring_size, rx_ring_size;
 293        int err = 0;
 294
 295        if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
 296                return -EINVAL;
 297        tx_ring_size = (int)sizeof(struct pch_gbe_tx_ring);
 298        rx_ring_size = (int)sizeof(struct pch_gbe_rx_ring);
 299
 300        if ((netif_running(adapter->netdev)))
 301                pch_gbe_down(adapter);
 302        tx_old = adapter->tx_ring;
 303        rx_old = adapter->rx_ring;
 304
 305        txdr = kzalloc(tx_ring_size, GFP_KERNEL);
 306        if (!txdr) {
 307                err = -ENOMEM;
 308                goto err_alloc_tx;
 309        }
 310        rxdr = kzalloc(rx_ring_size, GFP_KERNEL);
 311        if (!rxdr) {
 312                err = -ENOMEM;
 313                goto err_alloc_rx;
 314        }
 315        adapter->tx_ring = txdr;
 316        adapter->rx_ring = rxdr;
 317
 318        rxdr->count =
 319                clamp_val(ring->rx_pending, PCH_GBE_MIN_RXD, PCH_GBE_MAX_RXD);
 320        rxdr->count = roundup(rxdr->count, PCH_GBE_RX_DESC_MULTIPLE);
 321
 322        txdr->count =
 323                clamp_val(ring->tx_pending, PCH_GBE_MIN_RXD, PCH_GBE_MAX_RXD);
 324        txdr->count = roundup(txdr->count, PCH_GBE_TX_DESC_MULTIPLE);
 325
 326        if ((netif_running(adapter->netdev))) {
 327                /* Try to get new resources before deleting old */
 328                err = pch_gbe_setup_rx_resources(adapter, adapter->rx_ring);
 329                if (err)
 330                        goto err_setup_rx;
 331                err = pch_gbe_setup_tx_resources(adapter, adapter->tx_ring);
 332                if (err)
 333                        goto err_setup_tx;
 334                /* save the new, restore the old in order to free it,
 335                 * then restore the new back again */
 336#ifdef RINGFREE
 337                adapter->rx_ring = rx_old;
 338                adapter->tx_ring = tx_old;
 339                pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
 340                pch_gbe_free_tx_resources(adapter, adapter->tx_ring);
 341                kfree(tx_old);
 342                kfree(rx_old);
 343                adapter->rx_ring = rxdr;
 344                adapter->tx_ring = txdr;
 345#else
 346                pch_gbe_free_rx_resources(adapter, rx_old);
 347                pch_gbe_free_tx_resources(adapter, tx_old);
 348                kfree(tx_old);
 349                kfree(rx_old);
 350                adapter->rx_ring = rxdr;
 351                adapter->tx_ring = txdr;
 352#endif
 353                err = pch_gbe_up(adapter);
 354        }
 355        return err;
 356
 357err_setup_tx:
 358        pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
 359err_setup_rx:
 360        adapter->rx_ring = rx_old;
 361        adapter->tx_ring = tx_old;
 362        kfree(rxdr);
 363err_alloc_rx:
 364        kfree(txdr);
 365err_alloc_tx:
 366        if (netif_running(adapter->netdev))
 367                pch_gbe_up(adapter);
 368        return err;
 369}
 370
 371/**
 372 * pch_gbe_get_pauseparam - Report pause parameters
 373 * @netdev:  Network interface device structure
 374 * @pause:   Pause parameters structure
 375 */
 376static void pch_gbe_get_pauseparam(struct net_device *netdev,
 377                                       struct ethtool_pauseparam *pause)
 378{
 379        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 380        struct pch_gbe_hw *hw = &adapter->hw;
 381
 382        pause->autoneg =
 383            ((hw->mac.fc_autoneg) ? AUTONEG_ENABLE : AUTONEG_DISABLE);
 384
 385        if (hw->mac.fc == PCH_GBE_FC_RX_PAUSE) {
 386                pause->rx_pause = 1;
 387        } else if (hw->mac.fc == PCH_GBE_FC_TX_PAUSE) {
 388                pause->tx_pause = 1;
 389        } else if (hw->mac.fc == PCH_GBE_FC_FULL) {
 390                pause->rx_pause = 1;
 391                pause->tx_pause = 1;
 392        }
 393}
 394
 395/**
 396 * pch_gbe_set_pauseparam - Set pause parameters
 397 * @netdev:  Network interface device structure
 398 * @pause:   Pause parameters structure
 399 * Returns:
 400 *      0:                      Successful.
 401 *      Negative value:         Failed.
 402 */
 403static int pch_gbe_set_pauseparam(struct net_device *netdev,
 404                                       struct ethtool_pauseparam *pause)
 405{
 406        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 407        struct pch_gbe_hw *hw = &adapter->hw;
 408        int ret = 0;
 409
 410        hw->mac.fc_autoneg = pause->autoneg;
 411        if ((pause->rx_pause) && (pause->tx_pause))
 412                hw->mac.fc = PCH_GBE_FC_FULL;
 413        else if ((pause->rx_pause) && (!pause->tx_pause))
 414                hw->mac.fc = PCH_GBE_FC_RX_PAUSE;
 415        else if ((!pause->rx_pause) && (pause->tx_pause))
 416                hw->mac.fc = PCH_GBE_FC_TX_PAUSE;
 417        else if ((!pause->rx_pause) && (!pause->tx_pause))
 418                hw->mac.fc = PCH_GBE_FC_NONE;
 419
 420        if (hw->mac.fc_autoneg == AUTONEG_ENABLE) {
 421                if ((netif_running(adapter->netdev))) {
 422                        pch_gbe_down(adapter);
 423                        ret = pch_gbe_up(adapter);
 424                } else {
 425                        pch_gbe_reset(adapter);
 426                }
 427        } else {
 428                ret = pch_gbe_mac_force_mac_fc(hw);
 429        }
 430        return ret;
 431}
 432
 433/**
 434 * pch_gbe_get_strings - Return a set of strings that describe the requested
 435 *                       objects
 436 * @netdev:    Network interface device structure
 437 * @stringset: Select the stringset. [ETH_SS_TEST] [ETH_SS_STATS]
 438 * @data:      Pointer of read string data.
 439 */
 440static void pch_gbe_get_strings(struct net_device *netdev, u32 stringset,
 441                                        u8 *data)
 442{
 443        u8 *p = data;
 444        int i;
 445
 446        switch (stringset) {
 447        case (u32) ETH_SS_STATS:
 448                for (i = 0; i < PCH_GBE_GLOBAL_STATS_LEN; i++) {
 449                        memcpy(p, pch_gbe_gstrings_stats[i].string,
 450                               ETH_GSTRING_LEN);
 451                        p += ETH_GSTRING_LEN;
 452                }
 453                break;
 454        }
 455}
 456
 457/**
 458 * pch_gbe_get_ethtool_stats - Return statistics about the device
 459 * @netdev: Network interface device structure
 460 * @stats:  Ethtool statue structure
 461 * @data:   Pointer of read status area
 462 */
 463static void pch_gbe_get_ethtool_stats(struct net_device *netdev,
 464                                  struct ethtool_stats *stats, u64 *data)
 465{
 466        struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 467        int i;
 468        const struct pch_gbe_stats *gstats = pch_gbe_gstrings_stats;
 469        char *hw_stats = (char *)&adapter->stats;
 470
 471        pch_gbe_update_stats(adapter);
 472        for (i = 0; i < PCH_GBE_GLOBAL_STATS_LEN; i++) {
 473                char *p = hw_stats + gstats->offset;
 474                data[i] = gstats->size == sizeof(u64) ? *(u64 *)p:(*(u32 *)p);
 475                gstats++;
 476        }
 477}
 478
 479static int pch_gbe_get_sset_count(struct net_device *netdev, int sset)
 480{
 481        switch (sset) {
 482        case ETH_SS_STATS:
 483                return PCH_GBE_STATS_LEN;
 484        default:
 485                return -EOPNOTSUPP;
 486        }
 487}
 488
 489static const struct ethtool_ops pch_gbe_ethtool_ops = {
 490        .get_settings = pch_gbe_get_settings,
 491        .set_settings = pch_gbe_set_settings,
 492        .get_drvinfo = pch_gbe_get_drvinfo,
 493        .get_regs_len = pch_gbe_get_regs_len,
 494        .get_regs = pch_gbe_get_regs,
 495        .get_wol = pch_gbe_get_wol,
 496        .set_wol = pch_gbe_set_wol,
 497        .nway_reset = pch_gbe_nway_reset,
 498        .get_link = ethtool_op_get_link,
 499        .get_ringparam = pch_gbe_get_ringparam,
 500        .set_ringparam = pch_gbe_set_ringparam,
 501        .get_pauseparam = pch_gbe_get_pauseparam,
 502        .set_pauseparam = pch_gbe_set_pauseparam,
 503        .get_strings = pch_gbe_get_strings,
 504        .get_ethtool_stats = pch_gbe_get_ethtool_stats,
 505        .get_sset_count = pch_gbe_get_sset_count,
 506};
 507
 508void pch_gbe_set_ethtool_ops(struct net_device *netdev)
 509{
 510        netdev->ethtool_ops = &pch_gbe_ethtool_ops;
 511}
 512