drivers/net/phy/phy.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /* Framework for configuring and reading PHY devices
   3  * Based on code in sungem_phy.c and gianfar_phy.c
   4  *
   5  * Author: Andy Fleming
   6  *
   7  * Copyright (c) 2004 Freescale Semiconductor, Inc.
   8  * Copyright (c) 2006, 2007  Maciej W. Rozycki
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/string.h>
  13 #include <linux/errno.h>
  14 #include <linux/unistd.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/delay.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/netlink.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/skbuff.h>
  21 #include <linux/mm.h>
  22 #include <linux/module.h>
  23 #include <linux/mii.h>
  24 #include <linux/ethtool.h>
  25 #include <linux/ethtool_netlink.h>
  26 #include <linux/phy.h>
  27 #include <linux/phy_led_triggers.h>
  28 #include <linux/sfp.h>
  29 #include <linux/workqueue.h>
  30 #include <linux/mdio.h>
  31 #include <linux/io.h>
  32 #include <linux/uaccess.h>
  33 #include <linux/atomic.h>
  34 #include <net/netlink.h>
  35 #include <net/genetlink.h>
  36 #include <net/sock.h>
  37
  38 #define PHY_STATE_TIME  HZ
  39
  40 #define PHY_STATE_STR(_state)                   \
  41         case PHY_##_state:                      \
  42                 return __stringify(_state);     \
  43
  44 static const char *phy_state_to_str(enum phy_state st)
  45 {
  46         switch (st) {
  47         PHY_STATE_STR(DOWN)
  48         PHY_STATE_STR(READY)
  49         PHY_STATE_STR(UP)
  50         PHY_STATE_STR(RUNNING)
  51         PHY_STATE_STR(NOLINK)
  52         PHY_STATE_STR(CABLETEST)
  53         PHY_STATE_STR(HALTED)
  54         }
  55
  56         return NULL;
  57 }
  58
  59 static void phy_link_up(struct phy_device *phydev)
  60 {
  61         phydev->phy_link_change(phydev, true);
  62         phy_led_trigger_change_speed(phydev);
  63 }
  64
  65 static void phy_link_down(struct phy_device *phydev)
  66 {
  67         phydev->phy_link_change(phydev, false);
  68         phy_led_trigger_change_speed(phydev);
  69 }
  70
  71 static const char *phy_pause_str(struct phy_device *phydev)
  72 {
  73         bool local_pause, local_asym_pause;
  74
  75         if (phydev->autoneg == AUTONEG_DISABLE)
  76                 goto no_pause;
  77
  78         local_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
  79                                         phydev->advertising);
  80         local_asym_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
  81                                              phydev->advertising);
  82
  83         if (local_pause && phydev->pause)
  84                 return "rx/tx";
  85
  86         if (local_asym_pause && phydev->asym_pause) {
  87                 if (local_pause)
  88                         return "rx";
  89                 if (phydev->pause)
  90                         return "tx";
  91         }
  92
  93 no_pause:
  94         return "off";
  95 }
  96
  97 /**
  98  * phy_print_status - Convenience function to print out the current phy status
  99  * @phydev: the phy_device struct
 100  */
 101 void phy_print_status(struct phy_device *phydev)
 102 {
 103         if (phydev->link) {
 104                 netdev_info(phydev->attached_dev,
 105                         "Link is Up - %s/%s %s- flow control %s\n",
 106                         phy_speed_to_str(phydev->speed),
 107                         phy_duplex_to_str(phydev->duplex),
 108                         phydev->downshifted_rate ? "(downshifted) " : "",
 109                         phy_pause_str(phydev));
 110         } else  {
 111                 netdev_info(phydev->attached_dev, "Link is Down\n");
 112         }
 113 }
 114 EXPORT_SYMBOL(phy_print_status);
 115
 116 /**
 117  * phy_clear_interrupt - Ack the phy device's interrupt
 118  * @phydev: the phy_device struct
 119  *
 120  * If the @phydev driver has an ack_interrupt function, call it to
 121  * ack and clear the phy device's interrupt.
 122  *
 123  * Returns 0 on success or < 0 on error.
 124  */
 125 static int phy_clear_interrupt(struct phy_device *phydev)
 126 {
 127         if (phydev->drv->ack_interrupt)
 128                 return phydev->drv->ack_interrupt(phydev);
 129
 130         return 0;
 131 }
 132
 133 /**
 134  * phy_config_interrupt - configure the PHY device for the requested interrupts
 135  * @phydev: the phy_device struct
 136  * @interrupts: interrupt flags to configure for this @phydev
 137  *
 138  * Returns 0 on success or < 0 on error.
 139  */
 140 static int phy_config_interrupt(struct phy_device *phydev, bool interrupts)
 141 {
 142         phydev->interrupts = interrupts ? 1 : 0;
 143         if (phydev->drv->config_intr)
 144                 return phydev->drv->config_intr(phydev);
 145
 146         return 0;
 147 }
 148
 149 /**
 150  * phy_restart_aneg - restart auto-negotiation
 151  * @phydev: target phy_device struct
 152  *
 153  * Restart the autonegotiation on @phydev.  Returns >= 0 on success or
 154  * negative errno on error.
 155  */
 156 int phy_restart_aneg(struct phy_device *phydev)
 157 {
 158         int ret;
 159
 160         if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
 161                 ret = genphy_c45_restart_aneg(phydev);
 162         else
 163                 ret = genphy_restart_aneg(phydev);
 164
 165         return ret;
 166 }
 167 EXPORT_SYMBOL_GPL(phy_restart_aneg);
 168
 169 /**
 170  * phy_aneg_done - return auto-negotiation status
 171  * @phydev: target phy_device struct
 172  *
 173  * Description: Return the auto-negotiation status from this @phydev
 174  * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
 175  * is still pending.
 176  */
 177 int phy_aneg_done(struct phy_device *phydev)
 178 {
 179         if (phydev->drv && phydev->drv->aneg_done)
 180                 return phydev->drv->aneg_done(phydev);
 181         else if (phydev->is_c45)
 182                 return genphy_c45_aneg_done(phydev);
 183         else
 184                 return genphy_aneg_done(phydev);
 185 }
 186 EXPORT_SYMBOL(phy_aneg_done);
 187
 188 /**
 189  * phy_find_valid - find a PHY setting that matches the requested parameters
 190  * @speed: desired speed
 191  * @duplex: desired duplex
 192  * @supported: mask of supported link modes
 193  *
 194  * Locate a supported phy setting that is, in priority order:
 195  * - an exact match for the specified speed and duplex mode
 196  * - a match for the specified speed, or slower speed
 197  * - the slowest supported speed
 198  * Returns the matched phy_setting entry, or %NULL if no supported phy
 199  * settings were found.
 200  */
 201 static const struct phy_setting *
 202 phy_find_valid(int speed, int duplex, unsigned long *supported)
 203 {
 204         return phy_lookup_setting(speed, duplex, supported, false);
 205 }
 206
 207 /**
 208  * phy_supported_speeds - return all speeds currently supported by a phy device
 209  * @phy: The phy device to return supported speeds of.
 210  * @speeds: buffer to store supported speeds in.
 211  * @size:   size of speeds buffer.
 212  *
 213  * Description: Returns the number of supported speeds, and fills the speeds
 214  * buffer with the supported speeds. If speeds buffer is too small to contain
 215  * all currently supported speeds, will return as many speeds as can fit.
 216  */
 217 unsigned int phy_supported_speeds(struct phy_device *phy,
 218                                   unsigned int *speeds,
 219                                   unsigned int size)
 220 {
 221         return phy_speeds(speeds, size, phy->supported);
 222 }
 223
 224 /**
 225  * phy_check_valid - check if there is a valid PHY setting which matches
 226  *                   speed, duplex, and feature mask
 227  * @speed: speed to match
 228  * @duplex: duplex to match
 229  * @features: A mask of the valid settings
 230  *
 231  * Description: Returns true if there is a valid setting, false otherwise.
 232  */
 233 static inline bool phy_check_valid(int speed, int duplex,
 234                                    unsigned long *features)
 235 {
 236         return !!phy_lookup_setting(speed, duplex, features, true);
 237 }
 238
 239 /**
 240  * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
 241  * @phydev: the target phy_device struct
 242  *
 243  * Description: Make sure the PHY is set to supported speeds and
 244  *   duplexes.  Drop down by one in this order:  1000/FULL,
 245  *   1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
 246  */
 247 static void phy_sanitize_settings(struct phy_device *phydev)
 248 {
 249         const struct phy_setting *setting;
 250
 251         setting = phy_find_valid(phydev->speed, phydev->duplex,
 252                                  phydev->supported);
 253         if (setting) {
 254                 phydev->speed = setting->speed;
 255                 phydev->duplex = setting->duplex;
 256         } else {
 257                 /* We failed to find anything (no supported speeds?) */
 258                 phydev->speed = SPEED_UNKNOWN;
 259                 phydev->duplex = DUPLEX_UNKNOWN;
 260         }
 261 }
 262
 263 int phy_ethtool_ksettings_set(struct phy_device *phydev,
 264                               const struct ethtool_link_ksettings *cmd)
 265 {
 266         __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
 267         u8 autoneg = cmd->base.autoneg;
 268         u8 duplex = cmd->base.duplex;
 269         u32 speed = cmd->base.speed;
 270
 271         if (cmd->base.phy_address != phydev->mdio.addr)
 272                 return -EINVAL;
 273
 274         linkmode_copy(advertising, cmd->link_modes.advertising);
 275
 276         /* We make sure that we don't pass unsupported values in to the PHY */
 277         linkmode_and(advertising, advertising, phydev->supported);
 278
 279         /* Verify the settings we care about. */
 280         if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
 281                 return -EINVAL;
 282
 283         if (autoneg == AUTONEG_ENABLE && linkmode_empty(advertising))
 284                 return -EINVAL;
 285
 286         if (autoneg == AUTONEG_DISABLE &&
 287             ((speed != SPEED_1000 &&
 288               speed != SPEED_100 &&
 289               speed != SPEED_10) ||
 290              (duplex != DUPLEX_HALF &&
 291               duplex != DUPLEX_FULL)))
 292                 return -EINVAL;
 293
 294         phydev->autoneg = autoneg;
 295
 296         phydev->speed = speed;
 297
 298         linkmode_copy(phydev->advertising, advertising);
 299
 300         linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
 301                          phydev->advertising, autoneg == AUTONEG_ENABLE);
 302
 303         phydev->duplex = duplex;
 304         phydev->master_slave_set = cmd->base.master_slave_cfg;
 305         phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
 306
 307         /* Restart the PHY */
 308         phy_start_aneg(phydev);
 309
 310         return 0;
 311 }
 312 EXPORT_SYMBOL(phy_ethtool_ksettings_set);
 313
 314 void phy_ethtool_ksettings_get(struct phy_device *phydev,
 315                                struct ethtool_link_ksettings *cmd)
 316 {
 317         linkmode_copy(cmd->link_modes.supported, phydev->supported);
 318         linkmode_copy(cmd->link_modes.advertising, phydev->advertising);
 319         linkmode_copy(cmd->link_modes.lp_advertising, phydev->lp_advertising);
 320
 321         cmd->base.speed = phydev->speed;
 322         cmd->base.duplex = phydev->duplex;
 323         cmd->base.master_slave_cfg = phydev->master_slave_get;
 324         cmd->base.master_slave_state = phydev->master_slave_state;
 325         if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
 326                 cmd->base.port = PORT_BNC;
 327         else
 328                 cmd->base.port = PORT_MII;
 329         cmd->base.transceiver = phy_is_internal(phydev) ?
 330                                 XCVR_INTERNAL : XCVR_EXTERNAL;
 331         cmd->base.phy_address = phydev->mdio.addr;
 332         cmd->base.autoneg = phydev->autoneg;
 333         cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
 334         cmd->base.eth_tp_mdix = phydev->mdix;
 335 }
 336 EXPORT_SYMBOL(phy_ethtool_ksettings_get);
 337
 338 /**
 339  * phy_mii_ioctl - generic PHY MII ioctl interface
 340  * @phydev: the phy_device struct
 341  * @ifr: &struct ifreq for socket ioctl's
 342  * @cmd: ioctl cmd to execute
 343  *
 344  * Note that this function is currently incompatible with the
 345  * PHYCONTROL layer.  It changes registers without regard to
 346  * current state.  Use at own risk.
 347  */
 348 int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
 349 {
 350         struct mii_ioctl_data *mii_data = if_mii(ifr);
 351         u16 val = mii_data->val_in;
 352         bool change_autoneg = false;
 353         int prtad, devad;
 354
 355         switch (cmd) {
 356         case SIOCGMIIPHY:
 357                 mii_data->phy_id = phydev->mdio.addr;
 358                 /* fall through */
 359
 360         case SIOCGMIIREG:
 361                 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
 362                         prtad = mdio_phy_id_prtad(mii_data->phy_id);
 363                         devad = mdio_phy_id_devad(mii_data->phy_id);
 364                         devad = mdiobus_c45_addr(devad, mii_data->reg_num);
 365                 } else {
 366                         prtad = mii_data->phy_id;
 367                         devad = mii_data->reg_num;
 368                 }
 369                 mii_data->val_out = mdiobus_read(phydev->mdio.bus, prtad,
 370                                                  devad);
 371                 return 0;
 372
 373         case SIOCSMIIREG:
 374                 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
 375                         prtad = mdio_phy_id_prtad(mii_data->phy_id);
 376                         devad = mdio_phy_id_devad(mii_data->phy_id);
 377                         devad = mdiobus_c45_addr(devad, mii_data->reg_num);
 378                 } else {
 379                         prtad = mii_data->phy_id;
 380                         devad = mii_data->reg_num;
 381                 }
 382                 if (prtad == phydev->mdio.addr) {
 383                         switch (devad) {
 384                         case MII_BMCR:
 385                                 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
 386                                         if (phydev->autoneg == AUTONEG_ENABLE)
 387                                                 change_autoneg = true;
 388                                         phydev->autoneg = AUTONEG_DISABLE;
 389                                         if (val & BMCR_FULLDPLX)
 390                                                 phydev->duplex = DUPLEX_FULL;
 391                                         else
 392                                                 phydev->duplex = DUPLEX_HALF;
 393                                         if (val & BMCR_SPEED1000)
 394                                                 phydev->speed = SPEED_1000;
 395                                         else if (val & BMCR_SPEED100)
 396                                                 phydev->speed = SPEED_100;
 397                                         else phydev->speed = SPEED_10;
 398                                 }
 399                                 else {
 400                                         if (phydev->autoneg == AUTONEG_DISABLE)
 401                                                 change_autoneg = true;
 402                                         phydev->autoneg = AUTONEG_ENABLE;
 403                                 }
 404                                 break;
 405                         case MII_ADVERTISE:
 406                                 mii_adv_mod_linkmode_adv_t(phydev->advertising,
 407                                                            val);
 408                                 change_autoneg = true;
 409                                 break;
 410                         case MII_CTRL1000:
 411                                 mii_ctrl1000_mod_linkmode_adv_t(phydev->advertising,
 412                                                                 val);
 413                                 change_autoneg = true;
 414                                 break;
 415                         default:
 416                                 /* do nothing */
 417                                 break;
 418                         }
 419                 }
 420
 421                 mdiobus_write(phydev->mdio.bus, prtad, devad, val);
 422
 423                 if (prtad == phydev->mdio.addr &&
 424                     devad == MII_BMCR &&
 425                     val & BMCR_RESET)
 426                         return phy_init_hw(phydev);
 427
 428                 if (change_autoneg)
 429                         return phy_start_aneg(phydev);
 430
 431                 return 0;
 432
 433         case SIOCSHWTSTAMP:
 434                 if (phydev->mii_ts && phydev->mii_ts->hwtstamp)
 435                         return phydev->mii_ts->hwtstamp(phydev->mii_ts, ifr);
 436                 /* fall through */
 437
 438         default:
 439                 return -EOPNOTSUPP;
 440         }
 441 }
 442 EXPORT_SYMBOL(phy_mii_ioctl);
 443
 444 /**
 445  * phy_do_ioctl - generic ndo_do_ioctl implementation
 446  * @dev: the net_device struct
 447  * @ifr: &struct ifreq for socket ioctl's
 448  * @cmd: ioctl cmd to execute
 449  */
 450 int phy_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 451 {
 452         if (!dev->phydev)
 453                 return -ENODEV;
 454
 455         return phy_mii_ioctl(dev->phydev, ifr, cmd);
 456 }
 457 EXPORT_SYMBOL(phy_do_ioctl);
 458
 459 /* same as phy_do_ioctl, but ensures that net_device is running */
 460 int phy_do_ioctl_running(struct net_device *dev, struct ifreq *ifr, int cmd)
 461 {
 462         if (!netif_running(dev))
 463                 return -ENODEV;
 464
 465         return phy_do_ioctl(dev, ifr, cmd);
 466 }
 467 EXPORT_SYMBOL(phy_do_ioctl_running);
 468
 469 void phy_queue_state_machine(struct phy_device *phydev, unsigned long jiffies)
 470 {
 471         mod_delayed_work(system_power_efficient_wq, &phydev->state_queue,
 472                          jiffies);
 473 }
 474 EXPORT_SYMBOL(phy_queue_state_machine);
 475
 476 static void phy_trigger_machine(struct phy_device *phydev)
 477 {
 478         phy_queue_state_machine(phydev, 0);
 479 }
 480
 481 static void phy_abort_cable_test(struct phy_device *phydev)
 482 {
 483         int err;
 484
 485         ethnl_cable_test_finished(phydev);
 486
 487         err = phy_init_hw(phydev);
 488         if (err)
 489                 phydev_err(phydev, "Error while aborting cable test");
 490 }
 491
 492 int phy_start_cable_test(struct phy_device *phydev,
 493                          struct netlink_ext_ack *extack)
 494 {
 495         struct net_device *dev = phydev->attached_dev;
 496         int err = -ENOMEM;
 497
 498         if (!(phydev->drv &&
 499               phydev->drv->cable_test_start &&
 500               phydev->drv->cable_test_get_status)) {
 501                 NL_SET_ERR_MSG(extack,
 502                                "PHY driver does not support cable testing");
 503                 return -EOPNOTSUPP;
 504         }
 505
 506         mutex_lock(&phydev->lock);
 507         if (phydev->state == PHY_CABLETEST) {
 508                 NL_SET_ERR_MSG(extack,
 509                                "PHY already performing a test");
 510                 err = -EBUSY;
 511                 goto out;
 512         }
 513
 514         if (phydev->state < PHY_UP ||
 515             phydev->state > PHY_CABLETEST) {
 516                 NL_SET_ERR_MSG(extack,
 517                                "PHY not configured. Try setting interface up");
 518                 err = -EBUSY;
 519                 goto out;
 520         }
 521
 522         err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF);
 523         if (err)
 524                 goto out;
 525
 526         /* Mark the carrier down until the test is complete */
 527         phy_link_down(phydev);
 528
 529         netif_testing_on(dev);
 530         err = phydev->drv->cable_test_start(phydev);
 531         if (err) {
 532                 netif_testing_off(dev);
 533                 phy_link_up(phydev);
 534                 goto out_free;
 535         }
 536
 537         phydev->state = PHY_CABLETEST;
 538
 539         if (phy_polling_mode(phydev))
 540                 phy_trigger_machine(phydev);
 541
 542         mutex_unlock(&phydev->lock);
 543
 544         return 0;
 545
 546 out_free:
 547         ethnl_cable_test_free(phydev);
 548 out:
 549         mutex_unlock(&phydev->lock);
 550
 551         return err;
 552 }
 553 EXPORT_SYMBOL(phy_start_cable_test);
 554
 555 int phy_start_cable_test_tdr(struct phy_device *phydev,
 556                              struct netlink_ext_ack *extack,
 557                              const struct phy_tdr_config *config)
 558 {
 559         struct net_device *dev = phydev->attached_dev;
 560         int err = -ENOMEM;
 561
 562         if (!(phydev->drv &&
 563               phydev->drv->cable_test_tdr_start &&
 564               phydev->drv->cable_test_get_status)) {
 565                 NL_SET_ERR_MSG(extack,
 566                                "PHY driver does not support cable test TDR");
 567                 return -EOPNOTSUPP;
 568         }
 569
 570         mutex_lock(&phydev->lock);
 571         if (phydev->state == PHY_CABLETEST) {
 572                 NL_SET_ERR_MSG(extack,
 573                                "PHY already performing a test");
 574                 err = -EBUSY;
 575                 goto out;
 576         }
 577
 578         if (phydev->state < PHY_UP ||
 579             phydev->state > PHY_CABLETEST) {
 580                 NL_SET_ERR_MSG(extack,
 581                                "PHY not configured. Try setting interface up");
 582                 err = -EBUSY;
 583                 goto out;
 584         }
 585
 586         err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
 587         if (err)
 588                 goto out;
 589
 590         /* Mark the carrier down until the test is complete */
 591         phy_link_down(phydev);
 592
 593         netif_testing_on(dev);
 594         err = phydev->drv->cable_test_tdr_start(phydev, config);
 595         if (err) {
 596                 netif_testing_off(dev);
 597                 phy_link_up(phydev);
 598                 goto out_free;
 599         }
 600
 601         phydev->state = PHY_CABLETEST;
 602
 603         if (phy_polling_mode(phydev))
 604                 phy_trigger_machine(phydev);
 605
 606         mutex_unlock(&phydev->lock);
 607
 608         return 0;
 609
 610 out_free:
 611         ethnl_cable_test_free(phydev);
 612 out:
 613         mutex_unlock(&phydev->lock);
 614
 615         return err;
 616 }
 617 EXPORT_SYMBOL(phy_start_cable_test_tdr);
 618
 619 static int phy_config_aneg(struct phy_device *phydev)
 620 {
 621         if (phydev->drv->config_aneg)
 622                 return phydev->drv->config_aneg(phydev);
 623
 624         /* Clause 45 PHYs that don't implement Clause 22 registers are not
 625          * allowed to call genphy_config_aneg()
 626          */
 627         if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
 628                 return genphy_c45_config_aneg(phydev);
 629
 630         return genphy_config_aneg(phydev);
 631 }
 632
 633 /**
 634  * phy_check_link_status - check link status and set state accordingly
 635  * @phydev: the phy_device struct
 636  *
 637  * Description: Check for link and whether autoneg was triggered / is running
 638  * and set state accordingly
 639  */
 640 static int phy_check_link_status(struct phy_device *phydev)
 641 {
 642         int err;
 643
 644         WARN_ON(!mutex_is_locked(&phydev->lock));
 645
 646         /* Keep previous state if loopback is enabled because some PHYs
 647          * report that Link is Down when loopback is enabled.
 648          */
 649         if (phydev->loopback_enabled)
 650                 return 0;
 651
 652         err = phy_read_status(phydev);
 653         if (err)
 654                 return err;
 655
 656         if (phydev->link && phydev->state != PHY_RUNNING) {
 657                 phy_check_downshift(phydev);
 658                 phydev->state = PHY_RUNNING;
 659                 phy_link_up(phydev);
 660         } else if (!phydev->link && phydev->state != PHY_NOLINK) {
 661                 phydev->state = PHY_NOLINK;
 662                 phy_link_down(phydev);
 663         }
 664
 665         return 0;
 666 }
 667
 668 /**
 669  * phy_start_aneg - start auto-negotiation for this PHY device
 670  * @phydev: the phy_device struct
 671  *
 672  * Description: Sanitizes the settings (if we're not autonegotiating
 673  *   them), and then calls the driver's config_aneg function.
 674  *   If the PHYCONTROL Layer is operating, we change the state to
 675  *   reflect the beginning of Auto-negotiation or forcing.
 676  */
 677 int phy_start_aneg(struct phy_device *phydev)
 678 {
 679         int err;
 680
 681         if (!phydev->drv)
 682                 return -EIO;
 683
 684         mutex_lock(&phydev->lock);
 685
 686         if (AUTONEG_DISABLE == phydev->autoneg)
 687                 phy_sanitize_settings(phydev);
 688
 689         err = phy_config_aneg(phydev);
 690         if (err < 0)
 691                 goto out_unlock;
 692
 693         if (phy_is_started(phydev))
 694                 err = phy_check_link_status(phydev);
 695 out_unlock:
 696         mutex_unlock(&phydev->lock);
 697
 698         return err;
 699 }
 700 EXPORT_SYMBOL(phy_start_aneg);
 701
 702 static int phy_poll_aneg_done(struct phy_device *phydev)
 703 {
 704         unsigned int retries = 100;
 705         int ret;
 706
 707         do {
 708                 msleep(100);
 709                 ret = phy_aneg_done(phydev);
 710         } while (!ret && --retries);
 711
 712         if (!ret)
 713                 return -ETIMEDOUT;
 714
 715         return ret < 0 ? ret : 0;
 716 }
 717
 718 /**
 719  * phy_speed_down - set speed to lowest speed supported by both link partners
 720  * @phydev: the phy_device struct
 721  * @sync: perform action synchronously
 722  *
 723  * Description: Typically used to save energy when waiting for a WoL packet
 724  *
 725  * WARNING: Setting sync to false may cause the system being unable to suspend
 726  * in case the PHY generates an interrupt when finishing the autonegotiation.
 727  * This interrupt may wake up the system immediately after suspend.
 728  * Therefore use sync = false only if you're sure it's safe with the respective
 729  * network chip.
 730  */
 731 int phy_speed_down(struct phy_device *phydev, bool sync)
 732 {
 733         __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
 734         int ret;
 735
 736         if (phydev->autoneg != AUTONEG_ENABLE)
 737                 return 0;
 738
 739         linkmode_copy(adv_tmp, phydev->advertising);
 740
 741         ret = phy_speed_down_core(phydev);
 742         if (ret)
 743                 return ret;
 744
 745         linkmode_copy(phydev->adv_old, adv_tmp);
 746
 747         if (linkmode_equal(phydev->advertising, adv_tmp))
 748                 return 0;
 749
 750         ret = phy_config_aneg(phydev);
 751         if (ret)
 752                 return ret;
 753
 754         return sync ? phy_poll_aneg_done(phydev) : 0;
 755 }
 756 EXPORT_SYMBOL_GPL(phy_speed_down);
 757
 758 /**
 759  * phy_speed_up - (re)set advertised speeds to all supported speeds
 760  * @phydev: the phy_device struct
 761  *
 762  * Description: Used to revert the effect of phy_speed_down
 763  */
 764 int phy_speed_up(struct phy_device *phydev)
 765 {
 766         __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
 767
 768         if (phydev->autoneg != AUTONEG_ENABLE)
 769                 return 0;
 770
 771         if (linkmode_empty(phydev->adv_old))
 772                 return 0;
 773
 774         linkmode_copy(adv_tmp, phydev->advertising);
 775         linkmode_copy(phydev->advertising, phydev->adv_old);
 776         linkmode_zero(phydev->adv_old);
 777
 778         if (linkmode_equal(phydev->advertising, adv_tmp))
 779                 return 0;
 780
 781         return phy_config_aneg(phydev);
 782 }
 783 EXPORT_SYMBOL_GPL(phy_speed_up);
 784
 785 /**
 786  * phy_start_machine - start PHY state machine tracking
 787  * @phydev: the phy_device struct
 788  *
 789  * Description: The PHY infrastructure can run a state machine
 790  *   which tracks whether the PHY is starting up, negotiating,
 791  *   etc.  This function starts the delayed workqueue which tracks
 792  *   the state of the PHY. If you want to maintain your own state machine,
 793  *   do not call this function.
 794  */
 795 void phy_start_machine(struct phy_device *phydev)
 796 {
 797         phy_trigger_machine(phydev);
 798 }
 799 EXPORT_SYMBOL_GPL(phy_start_machine);
 800
 801 /**
 802  * phy_stop_machine - stop the PHY state machine tracking
 803  * @phydev: target phy_device struct
 804  *
 805  * Description: Stops the state machine delayed workqueue, sets the
 806  *   state to UP (unless it wasn't up yet). This function must be
 807  *   called BEFORE phy_detach.
 808  */
 809 void phy_stop_machine(struct phy_device *phydev)
 810 {
 811         cancel_delayed_work_sync(&phydev->state_queue);
 812
 813         mutex_lock(&phydev->lock);
 814         if (phy_is_started(phydev))
 815                 phydev->state = PHY_UP;
 816         mutex_unlock(&phydev->lock);
 817 }
 818
 819 /**
 820  * phy_error - enter HALTED state for this PHY device
 821  * @phydev: target phy_device struct
 822  *
 823  * Moves the PHY to the HALTED state in response to a read
 824  * or write error, and tells the controller the link is down.
 825  * Must not be called from interrupt context, or while the
 826  * phydev->lock is held.
 827  */
 828 static void phy_error(struct phy_device *phydev)
 829 {
 830         WARN_ON(1);
 831
 832         mutex_lock(&phydev->lock);
 833         phydev->state = PHY_HALTED;
 834         mutex_unlock(&phydev->lock);
 835
 836         phy_trigger_machine(phydev);
 837 }
 838
 839 /**
 840  * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
 841  * @phydev: target phy_device struct
 842  */
 843 int phy_disable_interrupts(struct phy_device *phydev)
 844 {
 845         int err;
 846
 847         /* Disable PHY interrupts */
 848         err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 849         if (err)
 850                 return err;
 851
 852         /* Clear the interrupt */
 853         return phy_clear_interrupt(phydev);
 854 }
 855
 856 /**
 857  * phy_interrupt - PHY interrupt handler
 858  * @irq: interrupt line
 859  * @phy_dat: phy_device pointer
 860  *
 861  * Description: Handle PHY interrupt
 862  */
 863 static irqreturn_t phy_interrupt(int irq, void *phy_dat)
 864 {
 865         struct phy_device *phydev = phy_dat;
 866         struct phy_driver *drv = phydev->drv;
 867
 868         if (drv->handle_interrupt)
 869                 return drv->handle_interrupt(phydev);
 870
 871         if (drv->did_interrupt && !drv->did_interrupt(phydev))
 872                 return IRQ_NONE;
 873
 874         /* reschedule state queue work to run as soon as possible */
 875         phy_trigger_machine(phydev);
 876
 877         /* did_interrupt() may have cleared the interrupt already */
 878         if (!drv->did_interrupt && phy_clear_interrupt(phydev)) {
 879                 phy_error(phydev);
 880                 return IRQ_NONE;
 881         }
 882
 883         return IRQ_HANDLED;
 884 }
 885
 886 /**
 887  * phy_enable_interrupts - Enable the interrupts from the PHY side
 888  * @phydev: target phy_device struct
 889  */
 890 static int phy_enable_interrupts(struct phy_device *phydev)
 891 {
 892         int err = phy_clear_interrupt(phydev);
 893
 894         if (err < 0)
 895                 return err;
 896
 897         return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
 898 }
 899
 900 /**
 901  * phy_request_interrupt - request and enable interrupt for a PHY device
 902  * @phydev: target phy_device struct
 903  *
 904  * Description: Request and enable the interrupt for the given PHY.
 905  *   If this fails, then we set irq to PHY_POLL.
 906  *   This should only be called with a valid IRQ number.
 907  */
 908 void phy_request_interrupt(struct phy_device *phydev)
 909 {
 910         int err;
 911
 912         err = request_threaded_irq(phydev->irq, NULL, phy_interrupt,
 913                                    IRQF_ONESHOT | IRQF_SHARED,
 914                                    phydev_name(phydev), phydev);
 915         if (err) {
 916                 phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n",
 917                             err, phydev->irq);
 918                 phydev->irq = PHY_POLL;
 919         } else {
 920                 if (phy_enable_interrupts(phydev)) {
 921                         phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n");
 922                         phy_free_interrupt(phydev);
 923                         phydev->irq = PHY_POLL;
 924                 }
 925         }
 926 }
 927 EXPORT_SYMBOL(phy_request_interrupt);
 928
 929 /**
 930  * phy_free_interrupt - disable and free interrupt for a PHY device
 931  * @phydev: target phy_device struct
 932  *
 933  * Description: Disable and free the interrupt for the given PHY.
 934  *   This should only be called with a valid IRQ number.
 935  */
 936 void phy_free_interrupt(struct phy_device *phydev)
 937 {
 938         phy_disable_interrupts(phydev);
 939         free_irq(phydev->irq, phydev);
 940 }
 941 EXPORT_SYMBOL(phy_free_interrupt);
 942
 943 /**
 944  * phy_stop - Bring down the PHY link, and stop checking the status
 945  * @phydev: target phy_device struct
 946  */
 947 void phy_stop(struct phy_device *phydev)
 948 {
 949         struct net_device *dev = phydev->attached_dev;
 950
 951         if (!phy_is_started(phydev)) {
 952                 WARN(1, "called from state %s\n",
 953                      phy_state_to_str(phydev->state));
 954                 return;
 955         }
 956
 957         mutex_lock(&phydev->lock);
 958
 959         if (phydev->state == PHY_CABLETEST) {
 960                 phy_abort_cable_test(phydev);
 961                 netif_testing_off(dev);
 962         }
 963
 964         if (phydev->sfp_bus)
 965                 sfp_upstream_stop(phydev->sfp_bus);
 966
 967         phydev->state = PHY_HALTED;
 968
 969         mutex_unlock(&phydev->lock);
 970
 971         phy_state_machine(&phydev->state_queue.work);
 972         phy_stop_machine(phydev);
 973
 974         /* Cannot call flush_scheduled_work() here as desired because
 975          * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler
 976          * will not reenable interrupts.
 977          */
 978 }
 979 EXPORT_SYMBOL(phy_stop);
 980
 981 /**
 982  * phy_start - start or restart a PHY device
 983  * @phydev: target phy_device struct
 984  *
 985  * Description: Indicates the attached device's readiness to
 986  *   handle PHY-related work.  Used during startup to start the
 987  *   PHY, and after a call to phy_stop() to resume operation.
 988  *   Also used to indicate the MDIO bus has cleared an error
 989  *   condition.
 990  */
 991 void phy_start(struct phy_device *phydev)
 992 {
 993         mutex_lock(&phydev->lock);
 994
 995         if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
 996                 WARN(1, "called from state %s\n",
 997                      phy_state_to_str(phydev->state));
 998                 goto out;
 999         }
1000
1001         if (phydev->sfp_bus)
1002                 sfp_upstream_start(phydev->sfp_bus);
1003
1004         /* if phy was suspended, bring the physical link up again */
1005         __phy_resume(phydev);
1006
1007         phydev->state = PHY_UP;
1008
1009         phy_start_machine(phydev);
1010 out:
1011         mutex_unlock(&phydev->lock);
1012 }
1013 EXPORT_SYMBOL(phy_start);
1014
1015 /**
1016  * phy_state_machine - Handle the state machine
1017  * @work: work_struct that describes the work to be done
1018  */
1019 void phy_state_machine(struct work_struct *work)
1020 {
1021         struct delayed_work *dwork = to_delayed_work(work);
1022         struct phy_device *phydev =
1023                         container_of(dwork, struct phy_device, state_queue);
1024         struct net_device *dev = phydev->attached_dev;
1025         bool needs_aneg = false, do_suspend = false;
1026         enum phy_state old_state;
1027         bool finished = false;
1028         int err = 0;
1029
1030         mutex_lock(&phydev->lock);
1031
1032         old_state = phydev->state;
1033
1034         switch (phydev->state) {
1035         case PHY_DOWN:
1036         case PHY_READY:
1037                 break;
1038         case PHY_UP:
1039                 needs_aneg = true;
1040
1041                 break;
1042         case PHY_NOLINK:
1043         case PHY_RUNNING:
1044                 err = phy_check_link_status(phydev);
1045                 break;
1046         case PHY_CABLETEST:
1047                 err = phydev->drv->cable_test_get_status(phydev, &finished);
1048                 if (err) {
1049                         phy_abort_cable_test(phydev);
1050                         netif_testing_off(dev);
1051                         needs_aneg = true;
1052                         phydev->state = PHY_UP;
1053                         break;
1054                 }
1055
1056                 if (finished) {
1057                         ethnl_cable_test_finished(phydev);
1058                         netif_testing_off(dev);
1059                         needs_aneg = true;
1060                         phydev->state = PHY_UP;
1061                 }
1062                 break;
1063         case PHY_HALTED:
1064                 if (phydev->link) {
1065                         phydev->link = 0;
1066                         phy_link_down(phydev);
1067                 }
1068                 do_suspend = true;
1069                 break;
1070         }
1071
1072         mutex_unlock(&phydev->lock);
1073
1074         if (needs_aneg)
1075                 err = phy_start_aneg(phydev);
1076         else if (do_suspend)
1077                 phy_suspend(phydev);
1078
1079         if (err < 0)
1080                 phy_error(phydev);
1081
1082         if (old_state != phydev->state) {
1083                 phydev_dbg(phydev, "PHY state change %s -> %s\n",
1084                            phy_state_to_str(old_state),
1085                            phy_state_to_str(phydev->state));
1086                 if (phydev->drv && phydev->drv->link_change_notify)
1087                         phydev->drv->link_change_notify(phydev);
1088         }
1089
1090         /* Only re-schedule a PHY state machine change if we are polling the
1091          * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving
1092          * between states from phy_mac_interrupt().
1093          *
1094          * In state PHY_HALTED the PHY gets suspended, so rescheduling the
1095          * state machine would be pointless and possibly error prone when
1096          * called from phy_disconnect() synchronously.
1097          */
1098         mutex_lock(&phydev->lock);
1099         if (phy_polling_mode(phydev) && phy_is_started(phydev))
1100                 phy_queue_state_machine(phydev, PHY_STATE_TIME);
1101         mutex_unlock(&phydev->lock);
1102 }
1103
1104 /**
1105  * phy_mac_interrupt - MAC says the link has changed
1106  * @phydev: phy_device struct with changed link
1107  *
1108  * The MAC layer is able to indicate there has been a change in the PHY link
1109  * status. Trigger the state machine and work a work queue.
1110  */
1111 void phy_mac_interrupt(struct phy_device *phydev)
1112 {
1113         /* Trigger a state machine change */
1114         phy_trigger_machine(phydev);
1115 }
1116 EXPORT_SYMBOL(phy_mac_interrupt);
1117
1118 static void mmd_eee_adv_to_linkmode(unsigned long *advertising, u16 eee_adv)
1119 {
1120         linkmode_zero(advertising);
1121
1122         if (eee_adv & MDIO_EEE_100TX)
1123                 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
1124                                  advertising);
1125         if (eee_adv & MDIO_EEE_1000T)
1126                 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
1127                                  advertising);
1128         if (eee_adv & MDIO_EEE_10GT)
1129                 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
1130                                  advertising);
1131         if (eee_adv & MDIO_EEE_1000KX)
1132                 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
1133                                  advertising);
1134         if (eee_adv & MDIO_EEE_10GKX4)
1135                 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
1136                                  advertising);
1137         if (eee_adv & MDIO_EEE_10GKR)
1138                 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
1139                                  advertising);
1140 }
1141
1142 /**
1143  * phy_init_eee - init and check the EEE feature
1144  * @phydev: target phy_device struct
1145  * @clk_stop_enable: PHY may stop the clock during LPI
1146  *
1147  * Description: it checks if the Energy-Efficient Ethernet (EEE)
1148  * is supported by looking at the MMD registers 3.20 and 7.60/61
1149  * and it programs the MMD register 3.0 setting the "Clock stop enable"
1150  * bit if required.
1151  */
1152 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1153 {
1154         if (!phydev->drv)
1155                 return -EIO;
1156
1157         /* According to 802.3az,the EEE is supported only in full duplex-mode.
1158          */
1159         if (phydev->duplex == DUPLEX_FULL) {
1160                 __ETHTOOL_DECLARE_LINK_MODE_MASK(common);
1161                 __ETHTOOL_DECLARE_LINK_MODE_MASK(lp);
1162                 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv);
1163                 int eee_lp, eee_cap, eee_adv;
1164                 int status;
1165                 u32 cap;
1166
1167                 /* Read phy status to properly get the right settings */
1168                 status = phy_read_status(phydev);
1169                 if (status)
1170                         return status;
1171
1172                 /* First check if the EEE ability is supported */
1173                 eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1174                 if (eee_cap <= 0)
1175                         goto eee_exit_err;
1176
1177                 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1178                 if (!cap)
1179                         goto eee_exit_err;
1180
1181                 /* Check which link settings negotiated and verify it in
1182                  * the EEE advertising registers.
1183                  */
1184                 eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1185                 if (eee_lp <= 0)
1186                         goto eee_exit_err;
1187
1188                 eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1189                 if (eee_adv <= 0)
1190                         goto eee_exit_err;
1191
1192                 mmd_eee_adv_to_linkmode(adv, eee_adv);
1193                 mmd_eee_adv_to_linkmode(lp, eee_lp);
1194                 linkmode_and(common, adv, lp);
1195
1196                 if (!phy_check_valid(phydev->speed, phydev->duplex, common))
1197                         goto eee_exit_err;
1198
1199                 if (clk_stop_enable)
1200                         /* Configure the PHY to stop receiving xMII
1201                          * clock while it is signaling LPI.
1202                          */
1203                         phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
1204                                          MDIO_PCS_CTRL1_CLKSTOP_EN);
1205
1206                 return 0; /* EEE supported */
1207         }
1208 eee_exit_err:
1209         return -EPROTONOSUPPORT;
1210 }
1211 EXPORT_SYMBOL(phy_init_eee);
1212
1213 /**
1214  * phy_get_eee_err - report the EEE wake error count
1215  * @phydev: target phy_device struct
1216  *
1217  * Description: it is to report the number of time where the PHY
1218  * failed to complete its normal wake sequence.
1219  */
1220 int phy_get_eee_err(struct phy_device *phydev)
1221 {
1222         if (!phydev->drv)
1223                 return -EIO;
1224
1225         return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
1226 }
1227 EXPORT_SYMBOL(phy_get_eee_err);
1228
1229 /**
1230  * phy_ethtool_get_eee - get EEE supported and status
1231  * @phydev: target phy_device struct
1232  * @data: ethtool_eee data
1233  *
1234  * Description: it reportes the Supported/Advertisement/LP Advertisement
1235  * capabilities.
1236  */
1237 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1238 {
1239         int val;
1240
1241         if (!phydev->drv)
1242                 return -EIO;
1243
1244         /* Get Supported EEE */
1245         val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1246         if (val < 0)
1247                 return val;
1248         data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1249
1250         /* Get advertisement EEE */
1251         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1252         if (val < 0)
1253                 return val;
1254         data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1255         data->eee_enabled = !!data->advertised;
1256
1257         /* Get LP advertisement EEE */
1258         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1259         if (val < 0)
1260                 return val;
1261         data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1262
1263         data->eee_active = !!(data->advertised & data->lp_advertised);
1264
1265         return 0;
1266 }
1267 EXPORT_SYMBOL(phy_ethtool_get_eee);
1268
1269 /**
1270  * phy_ethtool_set_eee - set EEE supported and status
1271  * @phydev: target phy_device struct
1272  * @data: ethtool_eee data
1273  *
1274  * Description: it is to program the Advertisement EEE register.
1275  */
1276 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1277 {
1278         int cap, old_adv, adv = 0, ret;
1279
1280         if (!phydev->drv)
1281                 return -EIO;
1282
1283         /* Get Supported EEE */
1284         cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1285         if (cap < 0)
1286                 return cap;
1287
1288         old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1289         if (old_adv < 0)
1290                 return old_adv;
1291
1292         if (data->eee_enabled) {
1293                 adv = !data->advertised ? cap :
1294                       ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
1295                 /* Mask prohibited EEE modes */
1296                 adv &= ~phydev->eee_broken_modes;
1297         }
1298
1299         if (old_adv != adv) {
1300                 ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1301                 if (ret < 0)
1302                         return ret;
1303
1304                 /* Restart autonegotiation so the new modes get sent to the
1305                  * link partner.
1306                  */
1307                 if (phydev->autoneg == AUTONEG_ENABLE) {
1308                         ret = phy_restart_aneg(phydev);
1309                         if (ret < 0)
1310                                 return ret;
1311                 }
1312         }
1313
1314         return 0;
1315 }
1316 EXPORT_SYMBOL(phy_ethtool_set_eee);
1317
1318 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1319 {
1320         if (phydev->drv && phydev->drv->set_wol)
1321                 return phydev->drv->set_wol(phydev, wol);
1322
1323         return -EOPNOTSUPP;
1324 }
1325 EXPORT_SYMBOL(phy_ethtool_set_wol);
1326
1327 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1328 {
1329         if (phydev->drv && phydev->drv->get_wol)
1330                 phydev->drv->get_wol(phydev, wol);
1331 }
1332 EXPORT_SYMBOL(phy_ethtool_get_wol);
1333
1334 int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1335                                    struct ethtool_link_ksettings *cmd)
1336 {
1337         struct phy_device *phydev = ndev->phydev;
1338
1339         if (!phydev)
1340                 return -ENODEV;
1341
1342         phy_ethtool_ksettings_get(phydev, cmd);
1343
1344         return 0;
1345 }
1346 EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1347
1348 int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1349                                    const struct ethtool_link_ksettings *cmd)
1350 {
1351         struct phy_device *phydev = ndev->phydev;
1352
1353         if (!phydev)
1354                 return -ENODEV;
1355
1356         return phy_ethtool_ksettings_set(phydev, cmd);
1357 }
1358 EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1359
1360 int phy_ethtool_nway_reset(struct net_device *ndev)
1361 {
1362         struct phy_device *phydev = ndev->phydev;
1363
1364         if (!phydev)
1365                 return -ENODEV;
1366
1367         if (!phydev->drv)
1368                 return -EIO;
1369
1370         return phy_restart_aneg(phydev);
1371 }
1372 EXPORT_SYMBOL(phy_ethtool_nway_reset);