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                 fallthrough;
 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                 fallthrough;
 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_ethtool_get_strings(struct phy_device *phydev, u8 *data)
 493 {
 494         if (!phydev->drv)
 495                 return -EIO;
 496
 497         mutex_lock(&phydev->lock);
 498         phydev->drv->get_strings(phydev, data);
 499         mutex_unlock(&phydev->lock);
 500
 501         return 0;
 502 }
 503 EXPORT_SYMBOL(phy_ethtool_get_strings);
 504
 505 int phy_ethtool_get_sset_count(struct phy_device *phydev)
 506 {
 507         int ret;
 508
 509         if (!phydev->drv)
 510                 return -EIO;
 511
 512         if (phydev->drv->get_sset_count &&
 513             phydev->drv->get_strings &&
 514             phydev->drv->get_stats) {
 515                 mutex_lock(&phydev->lock);
 516                 ret = phydev->drv->get_sset_count(phydev);
 517                 mutex_unlock(&phydev->lock);
 518
 519                 return ret;
 520         }
 521
 522         return -EOPNOTSUPP;
 523 }
 524 EXPORT_SYMBOL(phy_ethtool_get_sset_count);
 525
 526 int phy_ethtool_get_stats(struct phy_device *phydev,
 527                           struct ethtool_stats *stats, u64 *data)
 528 {
 529         if (!phydev->drv)
 530                 return -EIO;
 531
 532         mutex_lock(&phydev->lock);
 533         phydev->drv->get_stats(phydev, stats, data);
 534         mutex_unlock(&phydev->lock);
 535
 536         return 0;
 537 }
 538 EXPORT_SYMBOL(phy_ethtool_get_stats);
 539
 540 int phy_start_cable_test(struct phy_device *phydev,
 541                          struct netlink_ext_ack *extack)
 542 {
 543         struct net_device *dev = phydev->attached_dev;
 544         int err = -ENOMEM;
 545
 546         if (!(phydev->drv &&
 547               phydev->drv->cable_test_start &&
 548               phydev->drv->cable_test_get_status)) {
 549                 NL_SET_ERR_MSG(extack,
 550                                "PHY driver does not support cable testing");
 551                 return -EOPNOTSUPP;
 552         }
 553
 554         mutex_lock(&phydev->lock);
 555         if (phydev->state == PHY_CABLETEST) {
 556                 NL_SET_ERR_MSG(extack,
 557                                "PHY already performing a test");
 558                 err = -EBUSY;
 559                 goto out;
 560         }
 561
 562         if (phydev->state < PHY_UP ||
 563             phydev->state > PHY_CABLETEST) {
 564                 NL_SET_ERR_MSG(extack,
 565                                "PHY not configured. Try setting interface up");
 566                 err = -EBUSY;
 567                 goto out;
 568         }
 569
 570         err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF);
 571         if (err)
 572                 goto out;
 573
 574         /* Mark the carrier down until the test is complete */
 575         phy_link_down(phydev);
 576
 577         netif_testing_on(dev);
 578         err = phydev->drv->cable_test_start(phydev);
 579         if (err) {
 580                 netif_testing_off(dev);
 581                 phy_link_up(phydev);
 582                 goto out_free;
 583         }
 584
 585         phydev->state = PHY_CABLETEST;
 586
 587         if (phy_polling_mode(phydev))
 588                 phy_trigger_machine(phydev);
 589
 590         mutex_unlock(&phydev->lock);
 591
 592         return 0;
 593
 594 out_free:
 595         ethnl_cable_test_free(phydev);
 596 out:
 597         mutex_unlock(&phydev->lock);
 598
 599         return err;
 600 }
 601 EXPORT_SYMBOL(phy_start_cable_test);
 602
 603 int phy_start_cable_test_tdr(struct phy_device *phydev,
 604                              struct netlink_ext_ack *extack,
 605                              const struct phy_tdr_config *config)
 606 {
 607         struct net_device *dev = phydev->attached_dev;
 608         int err = -ENOMEM;
 609
 610         if (!(phydev->drv &&
 611               phydev->drv->cable_test_tdr_start &&
 612               phydev->drv->cable_test_get_status)) {
 613                 NL_SET_ERR_MSG(extack,
 614                                "PHY driver does not support cable test TDR");
 615                 return -EOPNOTSUPP;
 616         }
 617
 618         mutex_lock(&phydev->lock);
 619         if (phydev->state == PHY_CABLETEST) {
 620                 NL_SET_ERR_MSG(extack,
 621                                "PHY already performing a test");
 622                 err = -EBUSY;
 623                 goto out;
 624         }
 625
 626         if (phydev->state < PHY_UP ||
 627             phydev->state > PHY_CABLETEST) {
 628                 NL_SET_ERR_MSG(extack,
 629                                "PHY not configured. Try setting interface up");
 630                 err = -EBUSY;
 631                 goto out;
 632         }
 633
 634         err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
 635         if (err)
 636                 goto out;
 637
 638         /* Mark the carrier down until the test is complete */
 639         phy_link_down(phydev);
 640
 641         netif_testing_on(dev);
 642         err = phydev->drv->cable_test_tdr_start(phydev, config);
 643         if (err) {
 644                 netif_testing_off(dev);
 645                 phy_link_up(phydev);
 646                 goto out_free;
 647         }
 648
 649         phydev->state = PHY_CABLETEST;
 650
 651         if (phy_polling_mode(phydev))
 652                 phy_trigger_machine(phydev);
 653
 654         mutex_unlock(&phydev->lock);
 655
 656         return 0;
 657
 658 out_free:
 659         ethnl_cable_test_free(phydev);
 660 out:
 661         mutex_unlock(&phydev->lock);
 662
 663         return err;
 664 }
 665 EXPORT_SYMBOL(phy_start_cable_test_tdr);
 666
 667 static int phy_config_aneg(struct phy_device *phydev)
 668 {
 669         if (phydev->drv->config_aneg)
 670                 return phydev->drv->config_aneg(phydev);
 671
 672         /* Clause 45 PHYs that don't implement Clause 22 registers are not
 673          * allowed to call genphy_config_aneg()
 674          */
 675         if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
 676                 return genphy_c45_config_aneg(phydev);
 677
 678         return genphy_config_aneg(phydev);
 679 }
 680
 681 /**
 682  * phy_check_link_status - check link status and set state accordingly
 683  * @phydev: the phy_device struct
 684  *
 685  * Description: Check for link and whether autoneg was triggered / is running
 686  * and set state accordingly
 687  */
 688 static int phy_check_link_status(struct phy_device *phydev)
 689 {
 690         int err;
 691
 692         WARN_ON(!mutex_is_locked(&phydev->lock));
 693
 694         /* Keep previous state if loopback is enabled because some PHYs
 695          * report that Link is Down when loopback is enabled.
 696          */
 697         if (phydev->loopback_enabled)
 698                 return 0;
 699
 700         err = phy_read_status(phydev);
 701         if (err)
 702                 return err;
 703
 704         if (phydev->link && phydev->state != PHY_RUNNING) {
 705                 phy_check_downshift(phydev);
 706                 phydev->state = PHY_RUNNING;
 707                 phy_link_up(phydev);
 708         } else if (!phydev->link && phydev->state != PHY_NOLINK) {
 709                 phydev->state = PHY_NOLINK;
 710                 phy_link_down(phydev);
 711         }
 712
 713         return 0;
 714 }
 715
 716 /**
 717  * phy_start_aneg - start auto-negotiation for this PHY device
 718  * @phydev: the phy_device struct
 719  *
 720  * Description: Sanitizes the settings (if we're not autonegotiating
 721  *   them), and then calls the driver's config_aneg function.
 722  *   If the PHYCONTROL Layer is operating, we change the state to
 723  *   reflect the beginning of Auto-negotiation or forcing.
 724  */
 725 int phy_start_aneg(struct phy_device *phydev)
 726 {
 727         int err;
 728
 729         if (!phydev->drv)
 730                 return -EIO;
 731
 732         mutex_lock(&phydev->lock);
 733
 734         if (AUTONEG_DISABLE == phydev->autoneg)
 735                 phy_sanitize_settings(phydev);
 736
 737         err = phy_config_aneg(phydev);
 738         if (err < 0)
 739                 goto out_unlock;
 740
 741         if (phy_is_started(phydev))
 742                 err = phy_check_link_status(phydev);
 743 out_unlock:
 744         mutex_unlock(&phydev->lock);
 745
 746         return err;
 747 }
 748 EXPORT_SYMBOL(phy_start_aneg);
 749
 750 static int phy_poll_aneg_done(struct phy_device *phydev)
 751 {
 752         unsigned int retries = 100;
 753         int ret;
 754
 755         do {
 756                 msleep(100);
 757                 ret = phy_aneg_done(phydev);
 758         } while (!ret && --retries);
 759
 760         if (!ret)
 761                 return -ETIMEDOUT;
 762
 763         return ret < 0 ? ret : 0;
 764 }
 765
 766 /**
 767  * phy_speed_down - set speed to lowest speed supported by both link partners
 768  * @phydev: the phy_device struct
 769  * @sync: perform action synchronously
 770  *
 771  * Description: Typically used to save energy when waiting for a WoL packet
 772  *
 773  * WARNING: Setting sync to false may cause the system being unable to suspend
 774  * in case the PHY generates an interrupt when finishing the autonegotiation.
 775  * This interrupt may wake up the system immediately after suspend.
 776  * Therefore use sync = false only if you're sure it's safe with the respective
 777  * network chip.
 778  */
 779 int phy_speed_down(struct phy_device *phydev, bool sync)
 780 {
 781         __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
 782         int ret;
 783
 784         if (phydev->autoneg != AUTONEG_ENABLE)
 785                 return 0;
 786
 787         linkmode_copy(adv_tmp, phydev->advertising);
 788
 789         ret = phy_speed_down_core(phydev);
 790         if (ret)
 791                 return ret;
 792
 793         linkmode_copy(phydev->adv_old, adv_tmp);
 794
 795         if (linkmode_equal(phydev->advertising, adv_tmp))
 796                 return 0;
 797
 798         ret = phy_config_aneg(phydev);
 799         if (ret)
 800                 return ret;
 801
 802         return sync ? phy_poll_aneg_done(phydev) : 0;
 803 }
 804 EXPORT_SYMBOL_GPL(phy_speed_down);
 805
 806 /**
 807  * phy_speed_up - (re)set advertised speeds to all supported speeds
 808  * @phydev: the phy_device struct
 809  *
 810  * Description: Used to revert the effect of phy_speed_down
 811  */
 812 int phy_speed_up(struct phy_device *phydev)
 813 {
 814         __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
 815
 816         if (phydev->autoneg != AUTONEG_ENABLE)
 817                 return 0;
 818
 819         if (linkmode_empty(phydev->adv_old))
 820                 return 0;
 821
 822         linkmode_copy(adv_tmp, phydev->advertising);
 823         linkmode_copy(phydev->advertising, phydev->adv_old);
 824         linkmode_zero(phydev->adv_old);
 825
 826         if (linkmode_equal(phydev->advertising, adv_tmp))
 827                 return 0;
 828
 829         return phy_config_aneg(phydev);
 830 }
 831 EXPORT_SYMBOL_GPL(phy_speed_up);
 832
 833 /**
 834  * phy_start_machine - start PHY state machine tracking
 835  * @phydev: the phy_device struct
 836  *
 837  * Description: The PHY infrastructure can run a state machine
 838  *   which tracks whether the PHY is starting up, negotiating,
 839  *   etc.  This function starts the delayed workqueue which tracks
 840  *   the state of the PHY. If you want to maintain your own state machine,
 841  *   do not call this function.
 842  */
 843 void phy_start_machine(struct phy_device *phydev)
 844 {
 845         phy_trigger_machine(phydev);
 846 }
 847 EXPORT_SYMBOL_GPL(phy_start_machine);
 848
 849 /**
 850  * phy_stop_machine - stop the PHY state machine tracking
 851  * @phydev: target phy_device struct
 852  *
 853  * Description: Stops the state machine delayed workqueue, sets the
 854  *   state to UP (unless it wasn't up yet). This function must be
 855  *   called BEFORE phy_detach.
 856  */
 857 void phy_stop_machine(struct phy_device *phydev)
 858 {
 859         cancel_delayed_work_sync(&phydev->state_queue);
 860
 861         mutex_lock(&phydev->lock);
 862         if (phy_is_started(phydev))
 863                 phydev->state = PHY_UP;
 864         mutex_unlock(&phydev->lock);
 865 }
 866
 867 /**
 868  * phy_error - enter HALTED state for this PHY device
 869  * @phydev: target phy_device struct
 870  *
 871  * Moves the PHY to the HALTED state in response to a read
 872  * or write error, and tells the controller the link is down.
 873  * Must not be called from interrupt context, or while the
 874  * phydev->lock is held.
 875  */
 876 static void phy_error(struct phy_device *phydev)
 877 {
 878         WARN_ON(1);
 879
 880         mutex_lock(&phydev->lock);
 881         phydev->state = PHY_HALTED;
 882         mutex_unlock(&phydev->lock);
 883
 884         phy_trigger_machine(phydev);
 885 }
 886
 887 /**
 888  * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
 889  * @phydev: target phy_device struct
 890  */
 891 int phy_disable_interrupts(struct phy_device *phydev)
 892 {
 893         int err;
 894
 895         /* Disable PHY interrupts */
 896         err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 897         if (err)
 898                 return err;
 899
 900         /* Clear the interrupt */
 901         return phy_clear_interrupt(phydev);
 902 }
 903
 904 /**
 905  * phy_interrupt - PHY interrupt handler
 906  * @irq: interrupt line
 907  * @phy_dat: phy_device pointer
 908  *
 909  * Description: Handle PHY interrupt
 910  */
 911 static irqreturn_t phy_interrupt(int irq, void *phy_dat)
 912 {
 913         struct phy_device *phydev = phy_dat;
 914         struct phy_driver *drv = phydev->drv;
 915
 916         if (drv->handle_interrupt)
 917                 return drv->handle_interrupt(phydev);
 918
 919         if (drv->did_interrupt && !drv->did_interrupt(phydev))
 920                 return IRQ_NONE;
 921
 922         /* reschedule state queue work to run as soon as possible */
 923         phy_trigger_machine(phydev);
 924
 925         /* did_interrupt() may have cleared the interrupt already */
 926         if (!drv->did_interrupt && phy_clear_interrupt(phydev)) {
 927                 phy_error(phydev);
 928                 return IRQ_NONE;
 929         }
 930
 931         return IRQ_HANDLED;
 932 }
 933
 934 /**
 935  * phy_enable_interrupts - Enable the interrupts from the PHY side
 936  * @phydev: target phy_device struct
 937  */
 938 static int phy_enable_interrupts(struct phy_device *phydev)
 939 {
 940         int err = phy_clear_interrupt(phydev);
 941
 942         if (err < 0)
 943                 return err;
 944
 945         return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
 946 }
 947
 948 /**
 949  * phy_request_interrupt - request and enable interrupt for a PHY device
 950  * @phydev: target phy_device struct
 951  *
 952  * Description: Request and enable the interrupt for the given PHY.
 953  *   If this fails, then we set irq to PHY_POLL.
 954  *   This should only be called with a valid IRQ number.
 955  */
 956 void phy_request_interrupt(struct phy_device *phydev)
 957 {
 958         int err;
 959
 960         err = request_threaded_irq(phydev->irq, NULL, phy_interrupt,
 961                                    IRQF_ONESHOT | IRQF_SHARED,
 962                                    phydev_name(phydev), phydev);
 963         if (err) {
 964                 phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n",
 965                             err, phydev->irq);
 966                 phydev->irq = PHY_POLL;
 967         } else {
 968                 if (phy_enable_interrupts(phydev)) {
 969                         phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n");
 970                         phy_free_interrupt(phydev);
 971                         phydev->irq = PHY_POLL;
 972                 }
 973         }
 974 }
 975 EXPORT_SYMBOL(phy_request_interrupt);
 976
 977 /**
 978  * phy_free_interrupt - disable and free interrupt for a PHY device
 979  * @phydev: target phy_device struct
 980  *
 981  * Description: Disable and free the interrupt for the given PHY.
 982  *   This should only be called with a valid IRQ number.
 983  */
 984 void phy_free_interrupt(struct phy_device *phydev)
 985 {
 986         phy_disable_interrupts(phydev);
 987         free_irq(phydev->irq, phydev);
 988 }
 989 EXPORT_SYMBOL(phy_free_interrupt);
 990
 991 /**
 992  * phy_stop - Bring down the PHY link, and stop checking the status
 993  * @phydev: target phy_device struct
 994  */
 995 void phy_stop(struct phy_device *phydev)
 996 {
 997         struct net_device *dev = phydev->attached_dev;
 998
 999         if (!phy_is_started(phydev)) {
1000                 WARN(1, "called from state %s\n",
1001                      phy_state_to_str(phydev->state));
1002                 return;
1003         }
1004
1005         mutex_lock(&phydev->lock);
1006
1007         if (phydev->state == PHY_CABLETEST) {
1008                 phy_abort_cable_test(phydev);
1009                 netif_testing_off(dev);
1010         }
1011
1012         if (phydev->sfp_bus)
1013                 sfp_upstream_stop(phydev->sfp_bus);
1014
1015         phydev->state = PHY_HALTED;
1016
1017         mutex_unlock(&phydev->lock);
1018
1019         phy_state_machine(&phydev->state_queue.work);
1020         phy_stop_machine(phydev);
1021
1022         /* Cannot call flush_scheduled_work() here as desired because
1023          * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler
1024          * will not reenable interrupts.
1025          */
1026 }
1027 EXPORT_SYMBOL(phy_stop);
1028
1029 /**
1030  * phy_start - start or restart a PHY device
1031  * @phydev: target phy_device struct
1032  *
1033  * Description: Indicates the attached device's readiness to
1034  *   handle PHY-related work.  Used during startup to start the
1035  *   PHY, and after a call to phy_stop() to resume operation.
1036  *   Also used to indicate the MDIO bus has cleared an error
1037  *   condition.
1038  */
1039 void phy_start(struct phy_device *phydev)
1040 {
1041         mutex_lock(&phydev->lock);
1042
1043         if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
1044                 WARN(1, "called from state %s\n",
1045                      phy_state_to_str(phydev->state));
1046                 goto out;
1047         }
1048
1049         if (phydev->sfp_bus)
1050                 sfp_upstream_start(phydev->sfp_bus);
1051
1052         /* if phy was suspended, bring the physical link up again */
1053         __phy_resume(phydev);
1054
1055         phydev->state = PHY_UP;
1056
1057         phy_start_machine(phydev);
1058 out:
1059         mutex_unlock(&phydev->lock);
1060 }
1061 EXPORT_SYMBOL(phy_start);
1062
1063 /**
1064  * phy_state_machine - Handle the state machine
1065  * @work: work_struct that describes the work to be done
1066  */
1067 void phy_state_machine(struct work_struct *work)
1068 {
1069         struct delayed_work *dwork = to_delayed_work(work);
1070         struct phy_device *phydev =
1071                         container_of(dwork, struct phy_device, state_queue);
1072         struct net_device *dev = phydev->attached_dev;
1073         bool needs_aneg = false, do_suspend = false;
1074         enum phy_state old_state;
1075         bool finished = false;
1076         int err = 0;
1077
1078         mutex_lock(&phydev->lock);
1079
1080         old_state = phydev->state;
1081
1082         switch (phydev->state) {
1083         case PHY_DOWN:
1084         case PHY_READY:
1085                 break;
1086         case PHY_UP:
1087                 needs_aneg = true;
1088
1089                 break;
1090         case PHY_NOLINK:
1091         case PHY_RUNNING:
1092                 err = phy_check_link_status(phydev);
1093                 break;
1094         case PHY_CABLETEST:
1095                 err = phydev->drv->cable_test_get_status(phydev, &finished);
1096                 if (err) {
1097                         phy_abort_cable_test(phydev);
1098                         netif_testing_off(dev);
1099                         needs_aneg = true;
1100                         phydev->state = PHY_UP;
1101                         break;
1102                 }
1103
1104                 if (finished) {
1105                         ethnl_cable_test_finished(phydev);
1106                         netif_testing_off(dev);
1107                         needs_aneg = true;
1108                         phydev->state = PHY_UP;
1109                 }
1110                 break;
1111         case PHY_HALTED:
1112                 if (phydev->link) {
1113                         phydev->link = 0;
1114                         phy_link_down(phydev);
1115                 }
1116                 do_suspend = true;
1117                 break;
1118         }
1119
1120         mutex_unlock(&phydev->lock);
1121
1122         if (needs_aneg)
1123                 err = phy_start_aneg(phydev);
1124         else if (do_suspend)
1125                 phy_suspend(phydev);
1126
1127         if (err < 0)
1128                 phy_error(phydev);
1129
1130         if (old_state != phydev->state) {
1131                 phydev_dbg(phydev, "PHY state change %s -> %s\n",
1132                            phy_state_to_str(old_state),
1133                            phy_state_to_str(phydev->state));
1134                 if (phydev->drv && phydev->drv->link_change_notify)
1135                         phydev->drv->link_change_notify(phydev);
1136         }
1137
1138         /* Only re-schedule a PHY state machine change if we are polling the
1139          * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving
1140          * between states from phy_mac_interrupt().
1141          *
1142          * In state PHY_HALTED the PHY gets suspended, so rescheduling the
1143          * state machine would be pointless and possibly error prone when
1144          * called from phy_disconnect() synchronously.
1145          */
1146         mutex_lock(&phydev->lock);
1147         if (phy_polling_mode(phydev) && phy_is_started(phydev))
1148                 phy_queue_state_machine(phydev, PHY_STATE_TIME);
1149         mutex_unlock(&phydev->lock);
1150 }
1151
1152 /**
1153  * phy_mac_interrupt - MAC says the link has changed
1154  * @phydev: phy_device struct with changed link
1155  *
1156  * The MAC layer is able to indicate there has been a change in the PHY link
1157  * status. Trigger the state machine and work a work queue.
1158  */
1159 void phy_mac_interrupt(struct phy_device *phydev)
1160 {
1161         /* Trigger a state machine change */
1162         phy_trigger_machine(phydev);
1163 }
1164 EXPORT_SYMBOL(phy_mac_interrupt);
1165
1166 static void mmd_eee_adv_to_linkmode(unsigned long *advertising, u16 eee_adv)
1167 {
1168         linkmode_zero(advertising);
1169
1170         if (eee_adv & MDIO_EEE_100TX)
1171                 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
1172                                  advertising);
1173         if (eee_adv & MDIO_EEE_1000T)
1174                 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
1175                                  advertising);
1176         if (eee_adv & MDIO_EEE_10GT)
1177                 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
1178                                  advertising);
1179         if (eee_adv & MDIO_EEE_1000KX)
1180                 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
1181                                  advertising);
1182         if (eee_adv & MDIO_EEE_10GKX4)
1183                 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
1184                                  advertising);
1185         if (eee_adv & MDIO_EEE_10GKR)
1186                 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
1187                                  advertising);
1188 }
1189
1190 /**
1191  * phy_init_eee - init and check the EEE feature
1192  * @phydev: target phy_device struct
1193  * @clk_stop_enable: PHY may stop the clock during LPI
1194  *
1195  * Description: it checks if the Energy-Efficient Ethernet (EEE)
1196  * is supported by looking at the MMD registers 3.20 and 7.60/61
1197  * and it programs the MMD register 3.0 setting the "Clock stop enable"
1198  * bit if required.
1199  */
1200 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1201 {
1202         if (!phydev->drv)
1203                 return -EIO;
1204
1205         /* According to 802.3az,the EEE is supported only in full duplex-mode.
1206          */
1207         if (phydev->duplex == DUPLEX_FULL) {
1208                 __ETHTOOL_DECLARE_LINK_MODE_MASK(common);
1209                 __ETHTOOL_DECLARE_LINK_MODE_MASK(lp);
1210                 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv);
1211                 int eee_lp, eee_cap, eee_adv;
1212                 int status;
1213                 u32 cap;
1214
1215                 /* Read phy status to properly get the right settings */
1216                 status = phy_read_status(phydev);
1217                 if (status)
1218                         return status;
1219
1220                 /* First check if the EEE ability is supported */
1221                 eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1222                 if (eee_cap <= 0)
1223                         goto eee_exit_err;
1224
1225                 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1226                 if (!cap)
1227                         goto eee_exit_err;
1228
1229                 /* Check which link settings negotiated and verify it in
1230                  * the EEE advertising registers.
1231                  */
1232                 eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1233                 if (eee_lp <= 0)
1234                         goto eee_exit_err;
1235
1236                 eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1237                 if (eee_adv <= 0)
1238                         goto eee_exit_err;
1239
1240                 mmd_eee_adv_to_linkmode(adv, eee_adv);
1241                 mmd_eee_adv_to_linkmode(lp, eee_lp);
1242                 linkmode_and(common, adv, lp);
1243
1244                 if (!phy_check_valid(phydev->speed, phydev->duplex, common))
1245                         goto eee_exit_err;
1246
1247                 if (clk_stop_enable)
1248                         /* Configure the PHY to stop receiving xMII
1249                          * clock while it is signaling LPI.
1250                          */
1251                         phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
1252                                          MDIO_PCS_CTRL1_CLKSTOP_EN);
1253
1254                 return 0; /* EEE supported */
1255         }
1256 eee_exit_err:
1257         return -EPROTONOSUPPORT;
1258 }
1259 EXPORT_SYMBOL(phy_init_eee);
1260
1261 /**
1262  * phy_get_eee_err - report the EEE wake error count
1263  * @phydev: target phy_device struct
1264  *
1265  * Description: it is to report the number of time where the PHY
1266  * failed to complete its normal wake sequence.
1267  */
1268 int phy_get_eee_err(struct phy_device *phydev)
1269 {
1270         if (!phydev->drv)
1271                 return -EIO;
1272
1273         return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
1274 }
1275 EXPORT_SYMBOL(phy_get_eee_err);
1276
1277 /**
1278  * phy_ethtool_get_eee - get EEE supported and status
1279  * @phydev: target phy_device struct
1280  * @data: ethtool_eee data
1281  *
1282  * Description: it reportes the Supported/Advertisement/LP Advertisement
1283  * capabilities.
1284  */
1285 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1286 {
1287         int val;
1288
1289         if (!phydev->drv)
1290                 return -EIO;
1291
1292         /* Get Supported EEE */
1293         val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1294         if (val < 0)
1295                 return val;
1296         data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1297
1298         /* Get advertisement EEE */
1299         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1300         if (val < 0)
1301                 return val;
1302         data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1303         data->eee_enabled = !!data->advertised;
1304
1305         /* Get LP advertisement EEE */
1306         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1307         if (val < 0)
1308                 return val;
1309         data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1310
1311         data->eee_active = !!(data->advertised & data->lp_advertised);
1312
1313         return 0;
1314 }
1315 EXPORT_SYMBOL(phy_ethtool_get_eee);
1316
1317 /**
1318  * phy_ethtool_set_eee - set EEE supported and status
1319  * @phydev: target phy_device struct
1320  * @data: ethtool_eee data
1321  *
1322  * Description: it is to program the Advertisement EEE register.
1323  */
1324 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1325 {
1326         int cap, old_adv, adv = 0, ret;
1327
1328         if (!phydev->drv)
1329                 return -EIO;
1330
1331         /* Get Supported EEE */
1332         cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1333         if (cap < 0)
1334                 return cap;
1335
1336         old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1337         if (old_adv < 0)
1338                 return old_adv;
1339
1340         if (data->eee_enabled) {
1341                 adv = !data->advertised ? cap :
1342                       ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
1343                 /* Mask prohibited EEE modes */
1344                 adv &= ~phydev->eee_broken_modes;
1345         }
1346
1347         if (old_adv != adv) {
1348                 ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1349                 if (ret < 0)
1350                         return ret;
1351
1352                 /* Restart autonegotiation so the new modes get sent to the
1353                  * link partner.
1354                  */
1355                 if (phydev->autoneg == AUTONEG_ENABLE) {
1356                         ret = phy_restart_aneg(phydev);
1357                         if (ret < 0)
1358                                 return ret;
1359                 }
1360         }
1361
1362         return 0;
1363 }
1364 EXPORT_SYMBOL(phy_ethtool_set_eee);
1365
1366 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1367 {
1368         if (phydev->drv && phydev->drv->set_wol)
1369                 return phydev->drv->set_wol(phydev, wol);
1370
1371         return -EOPNOTSUPP;
1372 }
1373 EXPORT_SYMBOL(phy_ethtool_set_wol);
1374
1375 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1376 {
1377         if (phydev->drv && phydev->drv->get_wol)
1378                 phydev->drv->get_wol(phydev, wol);
1379 }
1380 EXPORT_SYMBOL(phy_ethtool_get_wol);
1381
1382 int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1383                                    struct ethtool_link_ksettings *cmd)
1384 {
1385         struct phy_device *phydev = ndev->phydev;
1386
1387         if (!phydev)
1388                 return -ENODEV;
1389
1390         phy_ethtool_ksettings_get(phydev, cmd);
1391
1392         return 0;
1393 }
1394 EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1395
1396 int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1397                                    const struct ethtool_link_ksettings *cmd)
1398 {
1399         struct phy_device *phydev = ndev->phydev;
1400
1401         if (!phydev)
1402                 return -ENODEV;
1403
1404         return phy_ethtool_ksettings_set(phydev, cmd);
1405 }
1406 EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1407
1408 int phy_ethtool_nway_reset(struct net_device *ndev)
1409 {
1410         struct phy_device *phydev = ndev->phydev;
1411
1412         if (!phydev)
1413                 return -ENODEV;
1414
1415         if (!phydev->drv)
1416                 return -EIO;
1417
1418         return phy_restart_aneg(phydev);
1419 }
1420 EXPORT_SYMBOL(phy_ethtool_nway_reset);