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_config_interrupt - configure the PHY device for the requested interrupts
 118  * @phydev: the phy_device struct
 119  * @interrupts: interrupt flags to configure for this @phydev
 120  *
 121  * Returns 0 on success or < 0 on error.
 122  */
 123 static int phy_config_interrupt(struct phy_device *phydev, bool interrupts)
 124 {
 125         phydev->interrupts = interrupts ? 1 : 0;
 126         if (phydev->drv->config_intr)
 127                 return phydev->drv->config_intr(phydev);
 128
 129         return 0;
 130 }
 131
 132 /**
 133  * phy_restart_aneg - restart auto-negotiation
 134  * @phydev: target phy_device struct
 135  *
 136  * Restart the autonegotiation on @phydev.  Returns >= 0 on success or
 137  * negative errno on error.
 138  */
 139 int phy_restart_aneg(struct phy_device *phydev)
 140 {
 141         int ret;
 142
 143         if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
 144                 ret = genphy_c45_restart_aneg(phydev);
 145         else
 146                 ret = genphy_restart_aneg(phydev);
 147
 148         return ret;
 149 }
 150 EXPORT_SYMBOL_GPL(phy_restart_aneg);
 151
 152 /**
 153  * phy_aneg_done - return auto-negotiation status
 154  * @phydev: target phy_device struct
 155  *
 156  * Description: Return the auto-negotiation status from this @phydev
 157  * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
 158  * is still pending.
 159  */
 160 int phy_aneg_done(struct phy_device *phydev)
 161 {
 162         if (phydev->drv && phydev->drv->aneg_done)
 163                 return phydev->drv->aneg_done(phydev);
 164         else if (phydev->is_c45)
 165                 return genphy_c45_aneg_done(phydev);
 166         else
 167                 return genphy_aneg_done(phydev);
 168 }
 169 EXPORT_SYMBOL(phy_aneg_done);
 170
 171 /**
 172  * phy_find_valid - find a PHY setting that matches the requested parameters
 173  * @speed: desired speed
 174  * @duplex: desired duplex
 175  * @supported: mask of supported link modes
 176  *
 177  * Locate a supported phy setting that is, in priority order:
 178  * - an exact match for the specified speed and duplex mode
 179  * - a match for the specified speed, or slower speed
 180  * - the slowest supported speed
 181  * Returns the matched phy_setting entry, or %NULL if no supported phy
 182  * settings were found.
 183  */
 184 static const struct phy_setting *
 185 phy_find_valid(int speed, int duplex, unsigned long *supported)
 186 {
 187         return phy_lookup_setting(speed, duplex, supported, false);
 188 }
 189
 190 /**
 191  * phy_supported_speeds - return all speeds currently supported by a phy device
 192  * @phy: The phy device to return supported speeds of.
 193  * @speeds: buffer to store supported speeds in.
 194  * @size:   size of speeds buffer.
 195  *
 196  * Description: Returns the number of supported speeds, and fills the speeds
 197  * buffer with the supported speeds. If speeds buffer is too small to contain
 198  * all currently supported speeds, will return as many speeds as can fit.
 199  */
 200 unsigned int phy_supported_speeds(struct phy_device *phy,
 201                                   unsigned int *speeds,
 202                                   unsigned int size)
 203 {
 204         return phy_speeds(speeds, size, phy->supported);
 205 }
 206
 207 /**
 208  * phy_check_valid - check if there is a valid PHY setting which matches
 209  *                   speed, duplex, and feature mask
 210  * @speed: speed to match
 211  * @duplex: duplex to match
 212  * @features: A mask of the valid settings
 213  *
 214  * Description: Returns true if there is a valid setting, false otherwise.
 215  */
 216 static inline bool phy_check_valid(int speed, int duplex,
 217                                    unsigned long *features)
 218 {
 219         return !!phy_lookup_setting(speed, duplex, features, true);
 220 }
 221
 222 /**
 223  * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
 224  * @phydev: the target phy_device struct
 225  *
 226  * Description: Make sure the PHY is set to supported speeds and
 227  *   duplexes.  Drop down by one in this order:  1000/FULL,
 228  *   1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
 229  */
 230 static void phy_sanitize_settings(struct phy_device *phydev)
 231 {
 232         const struct phy_setting *setting;
 233
 234         setting = phy_find_valid(phydev->speed, phydev->duplex,
 235                                  phydev->supported);
 236         if (setting) {
 237                 phydev->speed = setting->speed;
 238                 phydev->duplex = setting->duplex;
 239         } else {
 240                 /* We failed to find anything (no supported speeds?) */
 241                 phydev->speed = SPEED_UNKNOWN;
 242                 phydev->duplex = DUPLEX_UNKNOWN;
 243         }
 244 }
 245
 246 int phy_ethtool_ksettings_set(struct phy_device *phydev,
 247                               const struct ethtool_link_ksettings *cmd)
 248 {
 249         __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
 250         u8 autoneg = cmd->base.autoneg;
 251         u8 duplex = cmd->base.duplex;
 252         u32 speed = cmd->base.speed;
 253
 254         if (cmd->base.phy_address != phydev->mdio.addr)
 255                 return -EINVAL;
 256
 257         linkmode_copy(advertising, cmd->link_modes.advertising);
 258
 259         /* We make sure that we don't pass unsupported values in to the PHY */
 260         linkmode_and(advertising, advertising, phydev->supported);
 261
 262         /* Verify the settings we care about. */
 263         if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
 264                 return -EINVAL;
 265
 266         if (autoneg == AUTONEG_ENABLE && linkmode_empty(advertising))
 267                 return -EINVAL;
 268
 269         if (autoneg == AUTONEG_DISABLE &&
 270             ((speed != SPEED_1000 &&
 271               speed != SPEED_100 &&
 272               speed != SPEED_10) ||
 273              (duplex != DUPLEX_HALF &&
 274               duplex != DUPLEX_FULL)))
 275                 return -EINVAL;
 276
 277         phydev->autoneg = autoneg;
 278
 279         phydev->speed = speed;
 280
 281         linkmode_copy(phydev->advertising, advertising);
 282
 283         linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
 284                          phydev->advertising, autoneg == AUTONEG_ENABLE);
 285
 286         phydev->duplex = duplex;
 287         phydev->master_slave_set = cmd->base.master_slave_cfg;
 288         phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
 289
 290         /* Restart the PHY */
 291         phy_start_aneg(phydev);
 292
 293         return 0;
 294 }
 295 EXPORT_SYMBOL(phy_ethtool_ksettings_set);
 296
 297 void phy_ethtool_ksettings_get(struct phy_device *phydev,
 298                                struct ethtool_link_ksettings *cmd)
 299 {
 300         linkmode_copy(cmd->link_modes.supported, phydev->supported);
 301         linkmode_copy(cmd->link_modes.advertising, phydev->advertising);
 302         linkmode_copy(cmd->link_modes.lp_advertising, phydev->lp_advertising);
 303
 304         cmd->base.speed = phydev->speed;
 305         cmd->base.duplex = phydev->duplex;
 306         cmd->base.master_slave_cfg = phydev->master_slave_get;
 307         cmd->base.master_slave_state = phydev->master_slave_state;
 308         if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
 309                 cmd->base.port = PORT_BNC;
 310         else
 311                 cmd->base.port = PORT_MII;
 312         cmd->base.transceiver = phy_is_internal(phydev) ?
 313                                 XCVR_INTERNAL : XCVR_EXTERNAL;
 314         cmd->base.phy_address = phydev->mdio.addr;
 315         cmd->base.autoneg = phydev->autoneg;
 316         cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
 317         cmd->base.eth_tp_mdix = phydev->mdix;
 318 }
 319 EXPORT_SYMBOL(phy_ethtool_ksettings_get);
 320
 321 /**
 322  * phy_mii_ioctl - generic PHY MII ioctl interface
 323  * @phydev: the phy_device struct
 324  * @ifr: &struct ifreq for socket ioctl's
 325  * @cmd: ioctl cmd to execute
 326  *
 327  * Note that this function is currently incompatible with the
 328  * PHYCONTROL layer.  It changes registers without regard to
 329  * current state.  Use at own risk.
 330  */
 331 int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
 332 {
 333         struct mii_ioctl_data *mii_data = if_mii(ifr);
 334         u16 val = mii_data->val_in;
 335         bool change_autoneg = false;
 336         int prtad, devad;
 337
 338         switch (cmd) {
 339         case SIOCGMIIPHY:
 340                 mii_data->phy_id = phydev->mdio.addr;
 341                 fallthrough;
 342
 343         case SIOCGMIIREG:
 344                 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
 345                         prtad = mdio_phy_id_prtad(mii_data->phy_id);
 346                         devad = mdio_phy_id_devad(mii_data->phy_id);
 347                         devad = mdiobus_c45_addr(devad, mii_data->reg_num);
 348                 } else {
 349                         prtad = mii_data->phy_id;
 350                         devad = mii_data->reg_num;
 351                 }
 352                 mii_data->val_out = mdiobus_read(phydev->mdio.bus, prtad,
 353                                                  devad);
 354                 return 0;
 355
 356         case SIOCSMIIREG:
 357                 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
 358                         prtad = mdio_phy_id_prtad(mii_data->phy_id);
 359                         devad = mdio_phy_id_devad(mii_data->phy_id);
 360                         devad = mdiobus_c45_addr(devad, mii_data->reg_num);
 361                 } else {
 362                         prtad = mii_data->phy_id;
 363                         devad = mii_data->reg_num;
 364                 }
 365                 if (prtad == phydev->mdio.addr) {
 366                         switch (devad) {
 367                         case MII_BMCR:
 368                                 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
 369                                         if (phydev->autoneg == AUTONEG_ENABLE)
 370                                                 change_autoneg = true;
 371                                         phydev->autoneg = AUTONEG_DISABLE;
 372                                         if (val & BMCR_FULLDPLX)
 373                                                 phydev->duplex = DUPLEX_FULL;
 374                                         else
 375                                                 phydev->duplex = DUPLEX_HALF;
 376                                         if (val & BMCR_SPEED1000)
 377                                                 phydev->speed = SPEED_1000;
 378                                         else if (val & BMCR_SPEED100)
 379                                                 phydev->speed = SPEED_100;
 380                                         else phydev->speed = SPEED_10;
 381                                 }
 382                                 else {
 383                                         if (phydev->autoneg == AUTONEG_DISABLE)
 384                                                 change_autoneg = true;
 385                                         phydev->autoneg = AUTONEG_ENABLE;
 386                                 }
 387                                 break;
 388                         case MII_ADVERTISE:
 389                                 mii_adv_mod_linkmode_adv_t(phydev->advertising,
 390                                                            val);
 391                                 change_autoneg = true;
 392                                 break;
 393                         case MII_CTRL1000:
 394                                 mii_ctrl1000_mod_linkmode_adv_t(phydev->advertising,
 395                                                                 val);
 396                                 change_autoneg = true;
 397                                 break;
 398                         default:
 399                                 /* do nothing */
 400                                 break;
 401                         }
 402                 }
 403
 404                 mdiobus_write(phydev->mdio.bus, prtad, devad, val);
 405
 406                 if (prtad == phydev->mdio.addr &&
 407                     devad == MII_BMCR &&
 408                     val & BMCR_RESET)
 409                         return phy_init_hw(phydev);
 410
 411                 if (change_autoneg)
 412                         return phy_start_aneg(phydev);
 413
 414                 return 0;
 415
 416         case SIOCSHWTSTAMP:
 417                 if (phydev->mii_ts && phydev->mii_ts->hwtstamp)
 418                         return phydev->mii_ts->hwtstamp(phydev->mii_ts, ifr);
 419                 fallthrough;
 420
 421         default:
 422                 return -EOPNOTSUPP;
 423         }
 424 }
 425 EXPORT_SYMBOL(phy_mii_ioctl);
 426
 427 /**
 428  * phy_do_ioctl - generic ndo_do_ioctl implementation
 429  * @dev: the net_device struct
 430  * @ifr: &struct ifreq for socket ioctl's
 431  * @cmd: ioctl cmd to execute
 432  */
 433 int phy_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 434 {
 435         if (!dev->phydev)
 436                 return -ENODEV;
 437
 438         return phy_mii_ioctl(dev->phydev, ifr, cmd);
 439 }
 440 EXPORT_SYMBOL(phy_do_ioctl);
 441
 442 /**
 443  * phy_do_ioctl_running - generic ndo_do_ioctl implementation but test first
 444  *
 445  * @dev: the net_device struct
 446  * @ifr: &struct ifreq for socket ioctl's
 447  * @cmd: ioctl cmd to execute
 448  *
 449  * Same as phy_do_ioctl, but ensures that net_device is running before
 450  * handling the ioctl.
 451  */
 452 int phy_do_ioctl_running(struct net_device *dev, struct ifreq *ifr, int cmd)
 453 {
 454         if (!netif_running(dev))
 455                 return -ENODEV;
 456
 457         return phy_do_ioctl(dev, ifr, cmd);
 458 }
 459 EXPORT_SYMBOL(phy_do_ioctl_running);
 460
 461 /**
 462  * phy_queue_state_machine - Trigger the state machine to run soon
 463  *
 464  * @phydev: the phy_device struct
 465  * @jiffies: Run the state machine after these jiffies
 466  */
 467 void phy_queue_state_machine(struct phy_device *phydev, unsigned long jiffies)
 468 {
 469         mod_delayed_work(system_power_efficient_wq, &phydev->state_queue,
 470                          jiffies);
 471 }
 472 EXPORT_SYMBOL(phy_queue_state_machine);
 473
 474 /**
 475  * phy_trigger_machine - Trigger the state machine to run now
 476  *
 477  * @phydev: the phy_device struct
 478  */
 479 void phy_trigger_machine(struct phy_device *phydev)
 480 {
 481         phy_queue_state_machine(phydev, 0);
 482 }
 483 EXPORT_SYMBOL(phy_trigger_machine);
 484
 485 static void phy_abort_cable_test(struct phy_device *phydev)
 486 {
 487         int err;
 488
 489         ethnl_cable_test_finished(phydev);
 490
 491         err = phy_init_hw(phydev);
 492         if (err)
 493                 phydev_err(phydev, "Error while aborting cable test");
 494 }
 495
 496 /**
 497  * phy_ethtool_get_strings - Get the statistic counter names
 498  *
 499  * @phydev: the phy_device struct
 500  * @data: Where to put the strings
 501  */
 502 int phy_ethtool_get_strings(struct phy_device *phydev, u8 *data)
 503 {
 504         if (!phydev->drv)
 505                 return -EIO;
 506
 507         mutex_lock(&phydev->lock);
 508         phydev->drv->get_strings(phydev, data);
 509         mutex_unlock(&phydev->lock);
 510
 511         return 0;
 512 }
 513 EXPORT_SYMBOL(phy_ethtool_get_strings);
 514
 515 /**
 516  * phy_ethtool_get_sset_count - Get the number of statistic counters
 517  *
 518  * @phydev: the phy_device struct
 519  */
 520 int phy_ethtool_get_sset_count(struct phy_device *phydev)
 521 {
 522         int ret;
 523
 524         if (!phydev->drv)
 525                 return -EIO;
 526
 527         if (phydev->drv->get_sset_count &&
 528             phydev->drv->get_strings &&
 529             phydev->drv->get_stats) {
 530                 mutex_lock(&phydev->lock);
 531                 ret = phydev->drv->get_sset_count(phydev);
 532                 mutex_unlock(&phydev->lock);
 533
 534                 return ret;
 535         }
 536
 537         return -EOPNOTSUPP;
 538 }
 539 EXPORT_SYMBOL(phy_ethtool_get_sset_count);
 540
 541 /**
 542  * phy_ethtool_get_stats - Get the statistic counters
 543  *
 544  * @phydev: the phy_device struct
 545  * @stats: What counters to get
 546  * @data: Where to store the counters
 547  */
 548 int phy_ethtool_get_stats(struct phy_device *phydev,
 549                           struct ethtool_stats *stats, u64 *data)
 550 {
 551         if (!phydev->drv)
 552                 return -EIO;
 553
 554         mutex_lock(&phydev->lock);
 555         phydev->drv->get_stats(phydev, stats, data);
 556         mutex_unlock(&phydev->lock);
 557
 558         return 0;
 559 }
 560 EXPORT_SYMBOL(phy_ethtool_get_stats);
 561
 562 /**
 563  * phy_start_cable_test - Start a cable test
 564  *
 565  * @phydev: the phy_device struct
 566  * @extack: extack for reporting useful error messages
 567  */
 568 int phy_start_cable_test(struct phy_device *phydev,
 569                          struct netlink_ext_ack *extack)
 570 {
 571         struct net_device *dev = phydev->attached_dev;
 572         int err = -ENOMEM;
 573
 574         if (!(phydev->drv &&
 575               phydev->drv->cable_test_start &&
 576               phydev->drv->cable_test_get_status)) {
 577                 NL_SET_ERR_MSG(extack,
 578                                "PHY driver does not support cable testing");
 579                 return -EOPNOTSUPP;
 580         }
 581
 582         mutex_lock(&phydev->lock);
 583         if (phydev->state == PHY_CABLETEST) {
 584                 NL_SET_ERR_MSG(extack,
 585                                "PHY already performing a test");
 586                 err = -EBUSY;
 587                 goto out;
 588         }
 589
 590         if (phydev->state < PHY_UP ||
 591             phydev->state > PHY_CABLETEST) {
 592                 NL_SET_ERR_MSG(extack,
 593                                "PHY not configured. Try setting interface up");
 594                 err = -EBUSY;
 595                 goto out;
 596         }
 597
 598         err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF);
 599         if (err)
 600                 goto out;
 601
 602         /* Mark the carrier down until the test is complete */
 603         phy_link_down(phydev);
 604
 605         netif_testing_on(dev);
 606         err = phydev->drv->cable_test_start(phydev);
 607         if (err) {
 608                 netif_testing_off(dev);
 609                 phy_link_up(phydev);
 610                 goto out_free;
 611         }
 612
 613         phydev->state = PHY_CABLETEST;
 614
 615         if (phy_polling_mode(phydev))
 616                 phy_trigger_machine(phydev);
 617
 618         mutex_unlock(&phydev->lock);
 619
 620         return 0;
 621
 622 out_free:
 623         ethnl_cable_test_free(phydev);
 624 out:
 625         mutex_unlock(&phydev->lock);
 626
 627         return err;
 628 }
 629 EXPORT_SYMBOL(phy_start_cable_test);
 630
 631 /**
 632  * phy_start_cable_test_tdr - Start a raw TDR cable test
 633  *
 634  * @phydev: the phy_device struct
 635  * @extack: extack for reporting useful error messages
 636  * @config: Configuration of the test to run
 637  */
 638 int phy_start_cable_test_tdr(struct phy_device *phydev,
 639                              struct netlink_ext_ack *extack,
 640                              const struct phy_tdr_config *config)
 641 {
 642         struct net_device *dev = phydev->attached_dev;
 643         int err = -ENOMEM;
 644
 645         if (!(phydev->drv &&
 646               phydev->drv->cable_test_tdr_start &&
 647               phydev->drv->cable_test_get_status)) {
 648                 NL_SET_ERR_MSG(extack,
 649                                "PHY driver does not support cable test TDR");
 650                 return -EOPNOTSUPP;
 651         }
 652
 653         mutex_lock(&phydev->lock);
 654         if (phydev->state == PHY_CABLETEST) {
 655                 NL_SET_ERR_MSG(extack,
 656                                "PHY already performing a test");
 657                 err = -EBUSY;
 658                 goto out;
 659         }
 660
 661         if (phydev->state < PHY_UP ||
 662             phydev->state > PHY_CABLETEST) {
 663                 NL_SET_ERR_MSG(extack,
 664                                "PHY not configured. Try setting interface up");
 665                 err = -EBUSY;
 666                 goto out;
 667         }
 668
 669         err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
 670         if (err)
 671                 goto out;
 672
 673         /* Mark the carrier down until the test is complete */
 674         phy_link_down(phydev);
 675
 676         netif_testing_on(dev);
 677         err = phydev->drv->cable_test_tdr_start(phydev, config);
 678         if (err) {
 679                 netif_testing_off(dev);
 680                 phy_link_up(phydev);
 681                 goto out_free;
 682         }
 683
 684         phydev->state = PHY_CABLETEST;
 685
 686         if (phy_polling_mode(phydev))
 687                 phy_trigger_machine(phydev);
 688
 689         mutex_unlock(&phydev->lock);
 690
 691         return 0;
 692
 693 out_free:
 694         ethnl_cable_test_free(phydev);
 695 out:
 696         mutex_unlock(&phydev->lock);
 697
 698         return err;
 699 }
 700 EXPORT_SYMBOL(phy_start_cable_test_tdr);
 701
 702 static int phy_config_aneg(struct phy_device *phydev)
 703 {
 704         if (phydev->drv->config_aneg)
 705                 return phydev->drv->config_aneg(phydev);
 706
 707         /* Clause 45 PHYs that don't implement Clause 22 registers are not
 708          * allowed to call genphy_config_aneg()
 709          */
 710         if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
 711                 return genphy_c45_config_aneg(phydev);
 712
 713         return genphy_config_aneg(phydev);
 714 }
 715
 716 /**
 717  * phy_check_link_status - check link status and set state accordingly
 718  * @phydev: the phy_device struct
 719  *
 720  * Description: Check for link and whether autoneg was triggered / is running
 721  * and set state accordingly
 722  */
 723 static int phy_check_link_status(struct phy_device *phydev)
 724 {
 725         int err;
 726
 727         WARN_ON(!mutex_is_locked(&phydev->lock));
 728
 729         /* Keep previous state if loopback is enabled because some PHYs
 730          * report that Link is Down when loopback is enabled.
 731          */
 732         if (phydev->loopback_enabled)
 733                 return 0;
 734
 735         err = phy_read_status(phydev);
 736         if (err)
 737                 return err;
 738
 739         if (phydev->link && phydev->state != PHY_RUNNING) {
 740                 phy_check_downshift(phydev);
 741                 phydev->state = PHY_RUNNING;
 742                 phy_link_up(phydev);
 743         } else if (!phydev->link && phydev->state != PHY_NOLINK) {
 744                 phydev->state = PHY_NOLINK;
 745                 phy_link_down(phydev);
 746         }
 747
 748         return 0;
 749 }
 750
 751 /**
 752  * phy_start_aneg - start auto-negotiation for this PHY device
 753  * @phydev: the phy_device struct
 754  *
 755  * Description: Sanitizes the settings (if we're not autonegotiating
 756  *   them), and then calls the driver's config_aneg function.
 757  *   If the PHYCONTROL Layer is operating, we change the state to
 758  *   reflect the beginning of Auto-negotiation or forcing.
 759  */
 760 int phy_start_aneg(struct phy_device *phydev)
 761 {
 762         int err;
 763
 764         if (!phydev->drv)
 765                 return -EIO;
 766
 767         mutex_lock(&phydev->lock);
 768
 769         if (AUTONEG_DISABLE == phydev->autoneg)
 770                 phy_sanitize_settings(phydev);
 771
 772         err = phy_config_aneg(phydev);
 773         if (err < 0)
 774                 goto out_unlock;
 775
 776         if (phy_is_started(phydev))
 777                 err = phy_check_link_status(phydev);
 778 out_unlock:
 779         mutex_unlock(&phydev->lock);
 780
 781         return err;
 782 }
 783 EXPORT_SYMBOL(phy_start_aneg);
 784
 785 static int phy_poll_aneg_done(struct phy_device *phydev)
 786 {
 787         unsigned int retries = 100;
 788         int ret;
 789
 790         do {
 791                 msleep(100);
 792                 ret = phy_aneg_done(phydev);
 793         } while (!ret && --retries);
 794
 795         if (!ret)
 796                 return -ETIMEDOUT;
 797
 798         return ret < 0 ? ret : 0;
 799 }
 800
 801 /**
 802  * phy_speed_down - set speed to lowest speed supported by both link partners
 803  * @phydev: the phy_device struct
 804  * @sync: perform action synchronously
 805  *
 806  * Description: Typically used to save energy when waiting for a WoL packet
 807  *
 808  * WARNING: Setting sync to false may cause the system being unable to suspend
 809  * in case the PHY generates an interrupt when finishing the autonegotiation.
 810  * This interrupt may wake up the system immediately after suspend.
 811  * Therefore use sync = false only if you're sure it's safe with the respective
 812  * network chip.
 813  */
 814 int phy_speed_down(struct phy_device *phydev, bool sync)
 815 {
 816         __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
 817         int ret;
 818
 819         if (phydev->autoneg != AUTONEG_ENABLE)
 820                 return 0;
 821
 822         linkmode_copy(adv_tmp, phydev->advertising);
 823
 824         ret = phy_speed_down_core(phydev);
 825         if (ret)
 826                 return ret;
 827
 828         linkmode_copy(phydev->adv_old, adv_tmp);
 829
 830         if (linkmode_equal(phydev->advertising, adv_tmp))
 831                 return 0;
 832
 833         ret = phy_config_aneg(phydev);
 834         if (ret)
 835                 return ret;
 836
 837         return sync ? phy_poll_aneg_done(phydev) : 0;
 838 }
 839 EXPORT_SYMBOL_GPL(phy_speed_down);
 840
 841 /**
 842  * phy_speed_up - (re)set advertised speeds to all supported speeds
 843  * @phydev: the phy_device struct
 844  *
 845  * Description: Used to revert the effect of phy_speed_down
 846  */
 847 int phy_speed_up(struct phy_device *phydev)
 848 {
 849         __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
 850
 851         if (phydev->autoneg != AUTONEG_ENABLE)
 852                 return 0;
 853
 854         if (linkmode_empty(phydev->adv_old))
 855                 return 0;
 856
 857         linkmode_copy(adv_tmp, phydev->advertising);
 858         linkmode_copy(phydev->advertising, phydev->adv_old);
 859         linkmode_zero(phydev->adv_old);
 860
 861         if (linkmode_equal(phydev->advertising, adv_tmp))
 862                 return 0;
 863
 864         return phy_config_aneg(phydev);
 865 }
 866 EXPORT_SYMBOL_GPL(phy_speed_up);
 867
 868 /**
 869  * phy_start_machine - start PHY state machine tracking
 870  * @phydev: the phy_device struct
 871  *
 872  * Description: The PHY infrastructure can run a state machine
 873  *   which tracks whether the PHY is starting up, negotiating,
 874  *   etc.  This function starts the delayed workqueue which tracks
 875  *   the state of the PHY. If you want to maintain your own state machine,
 876  *   do not call this function.
 877  */
 878 void phy_start_machine(struct phy_device *phydev)
 879 {
 880         phy_trigger_machine(phydev);
 881 }
 882 EXPORT_SYMBOL_GPL(phy_start_machine);
 883
 884 /**
 885  * phy_stop_machine - stop the PHY state machine tracking
 886  * @phydev: target phy_device struct
 887  *
 888  * Description: Stops the state machine delayed workqueue, sets the
 889  *   state to UP (unless it wasn't up yet). This function must be
 890  *   called BEFORE phy_detach.
 891  */
 892 void phy_stop_machine(struct phy_device *phydev)
 893 {
 894         cancel_delayed_work_sync(&phydev->state_queue);
 895
 896         mutex_lock(&phydev->lock);
 897         if (phy_is_started(phydev))
 898                 phydev->state = PHY_UP;
 899         mutex_unlock(&phydev->lock);
 900 }
 901
 902 /**
 903  * phy_error - enter HALTED state for this PHY device
 904  * @phydev: target phy_device struct
 905  *
 906  * Moves the PHY to the HALTED state in response to a read
 907  * or write error, and tells the controller the link is down.
 908  * Must not be called from interrupt context, or while the
 909  * phydev->lock is held.
 910  */
 911 void phy_error(struct phy_device *phydev)
 912 {
 913         WARN_ON(1);
 914
 915         mutex_lock(&phydev->lock);
 916         phydev->state = PHY_HALTED;
 917         mutex_unlock(&phydev->lock);
 918
 919         phy_trigger_machine(phydev);
 920 }
 921 EXPORT_SYMBOL(phy_error);
 922
 923 /**
 924  * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
 925  * @phydev: target phy_device struct
 926  */
 927 int phy_disable_interrupts(struct phy_device *phydev)
 928 {
 929         /* Disable PHY interrupts */
 930         return phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 931 }
 932
 933 /**
 934  * phy_interrupt - PHY interrupt handler
 935  * @irq: interrupt line
 936  * @phy_dat: phy_device pointer
 937  *
 938  * Description: Handle PHY interrupt
 939  */
 940 static irqreturn_t phy_interrupt(int irq, void *phy_dat)
 941 {
 942         struct phy_device *phydev = phy_dat;
 943         struct phy_driver *drv = phydev->drv;
 944
 945         return drv->handle_interrupt(phydev);
 946 }
 947
 948 /**
 949  * phy_enable_interrupts - Enable the interrupts from the PHY side
 950  * @phydev: target phy_device struct
 951  */
 952 static int phy_enable_interrupts(struct phy_device *phydev)
 953 {
 954         return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
 955 }
 956
 957 /**
 958  * phy_request_interrupt - request and enable interrupt for a PHY device
 959  * @phydev: target phy_device struct
 960  *
 961  * Description: Request and enable the interrupt for the given PHY.
 962  *   If this fails, then we set irq to PHY_POLL.
 963  *   This should only be called with a valid IRQ number.
 964  */
 965 void phy_request_interrupt(struct phy_device *phydev)
 966 {
 967         int err;
 968
 969         err = request_threaded_irq(phydev->irq, NULL, phy_interrupt,
 970                                    IRQF_ONESHOT | IRQF_SHARED,
 971                                    phydev_name(phydev), phydev);
 972         if (err) {
 973                 phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n",
 974                             err, phydev->irq);
 975                 phydev->irq = PHY_POLL;
 976         } else {
 977                 if (phy_enable_interrupts(phydev)) {
 978                         phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n");
 979                         phy_free_interrupt(phydev);
 980                         phydev->irq = PHY_POLL;
 981                 }
 982         }
 983 }
 984 EXPORT_SYMBOL(phy_request_interrupt);
 985
 986 /**
 987  * phy_free_interrupt - disable and free interrupt for a PHY device
 988  * @phydev: target phy_device struct
 989  *
 990  * Description: Disable and free the interrupt for the given PHY.
 991  *   This should only be called with a valid IRQ number.
 992  */
 993 void phy_free_interrupt(struct phy_device *phydev)
 994 {
 995         phy_disable_interrupts(phydev);
 996         free_irq(phydev->irq, phydev);
 997 }
 998 EXPORT_SYMBOL(phy_free_interrupt);
 999
1000 /**
1001  * phy_stop - Bring down the PHY link, and stop checking the status
1002  * @phydev: target phy_device struct
1003  */
1004 void phy_stop(struct phy_device *phydev)
1005 {
1006         struct net_device *dev = phydev->attached_dev;
1007
1008         if (!phy_is_started(phydev) && phydev->state != PHY_DOWN) {
1009                 WARN(1, "called from state %s\n",
1010                      phy_state_to_str(phydev->state));
1011                 return;
1012         }
1013
1014         mutex_lock(&phydev->lock);
1015
1016         if (phydev->state == PHY_CABLETEST) {
1017                 phy_abort_cable_test(phydev);
1018                 netif_testing_off(dev);
1019         }
1020
1021         if (phydev->sfp_bus)
1022                 sfp_upstream_stop(phydev->sfp_bus);
1023
1024         phydev->state = PHY_HALTED;
1025
1026         mutex_unlock(&phydev->lock);
1027
1028         phy_state_machine(&phydev->state_queue.work);
1029         phy_stop_machine(phydev);
1030
1031         /* Cannot call flush_scheduled_work() here as desired because
1032          * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler
1033          * will not reenable interrupts.
1034          */
1035 }
1036 EXPORT_SYMBOL(phy_stop);
1037
1038 /**
1039  * phy_start - start or restart a PHY device
1040  * @phydev: target phy_device struct
1041  *
1042  * Description: Indicates the attached device's readiness to
1043  *   handle PHY-related work.  Used during startup to start the
1044  *   PHY, and after a call to phy_stop() to resume operation.
1045  *   Also used to indicate the MDIO bus has cleared an error
1046  *   condition.
1047  */
1048 void phy_start(struct phy_device *phydev)
1049 {
1050         mutex_lock(&phydev->lock);
1051
1052         if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
1053                 WARN(1, "called from state %s\n",
1054                      phy_state_to_str(phydev->state));
1055                 goto out;
1056         }
1057
1058         if (phydev->sfp_bus)
1059                 sfp_upstream_start(phydev->sfp_bus);
1060
1061         /* if phy was suspended, bring the physical link up again */
1062         __phy_resume(phydev);
1063
1064         phydev->state = PHY_UP;
1065
1066         phy_start_machine(phydev);
1067 out:
1068         mutex_unlock(&phydev->lock);
1069 }
1070 EXPORT_SYMBOL(phy_start);
1071
1072 /**
1073  * phy_state_machine - Handle the state machine
1074  * @work: work_struct that describes the work to be done
1075  */
1076 void phy_state_machine(struct work_struct *work)
1077 {
1078         struct delayed_work *dwork = to_delayed_work(work);
1079         struct phy_device *phydev =
1080                         container_of(dwork, struct phy_device, state_queue);
1081         struct net_device *dev = phydev->attached_dev;
1082         bool needs_aneg = false, do_suspend = false;
1083         enum phy_state old_state;
1084         bool finished = false;
1085         int err = 0;
1086
1087         mutex_lock(&phydev->lock);
1088
1089         old_state = phydev->state;
1090
1091         switch (phydev->state) {
1092         case PHY_DOWN:
1093         case PHY_READY:
1094                 break;
1095         case PHY_UP:
1096                 needs_aneg = true;
1097
1098                 break;
1099         case PHY_NOLINK:
1100         case PHY_RUNNING:
1101                 err = phy_check_link_status(phydev);
1102                 break;
1103         case PHY_CABLETEST:
1104                 err = phydev->drv->cable_test_get_status(phydev, &finished);
1105                 if (err) {
1106                         phy_abort_cable_test(phydev);
1107                         netif_testing_off(dev);
1108                         needs_aneg = true;
1109                         phydev->state = PHY_UP;
1110                         break;
1111                 }
1112
1113                 if (finished) {
1114                         ethnl_cable_test_finished(phydev);
1115                         netif_testing_off(dev);
1116                         needs_aneg = true;
1117                         phydev->state = PHY_UP;
1118                 }
1119                 break;
1120         case PHY_HALTED:
1121                 if (phydev->link) {
1122                         phydev->link = 0;
1123                         phy_link_down(phydev);
1124                 }
1125                 do_suspend = true;
1126                 break;
1127         }
1128
1129         mutex_unlock(&phydev->lock);
1130
1131         if (needs_aneg)
1132                 err = phy_start_aneg(phydev);
1133         else if (do_suspend)
1134                 phy_suspend(phydev);
1135
1136         if (err < 0)
1137                 phy_error(phydev);
1138
1139         if (old_state != phydev->state) {
1140                 phydev_dbg(phydev, "PHY state change %s -> %s\n",
1141                            phy_state_to_str(old_state),
1142                            phy_state_to_str(phydev->state));
1143                 if (phydev->drv && phydev->drv->link_change_notify)
1144                         phydev->drv->link_change_notify(phydev);
1145         }
1146
1147         /* Only re-schedule a PHY state machine change if we are polling the
1148          * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving
1149          * between states from phy_mac_interrupt().
1150          *
1151          * In state PHY_HALTED the PHY gets suspended, so rescheduling the
1152          * state machine would be pointless and possibly error prone when
1153          * called from phy_disconnect() synchronously.
1154          */
1155         mutex_lock(&phydev->lock);
1156         if (phy_polling_mode(phydev) && phy_is_started(phydev))
1157                 phy_queue_state_machine(phydev, PHY_STATE_TIME);
1158         mutex_unlock(&phydev->lock);
1159 }
1160
1161 /**
1162  * phy_mac_interrupt - MAC says the link has changed
1163  * @phydev: phy_device struct with changed link
1164  *
1165  * The MAC layer is able to indicate there has been a change in the PHY link
1166  * status. Trigger the state machine and work a work queue.
1167  */
1168 void phy_mac_interrupt(struct phy_device *phydev)
1169 {
1170         /* Trigger a state machine change */
1171         phy_trigger_machine(phydev);
1172 }
1173 EXPORT_SYMBOL(phy_mac_interrupt);
1174
1175 static void mmd_eee_adv_to_linkmode(unsigned long *advertising, u16 eee_adv)
1176 {
1177         linkmode_zero(advertising);
1178
1179         if (eee_adv & MDIO_EEE_100TX)
1180                 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
1181                                  advertising);
1182         if (eee_adv & MDIO_EEE_1000T)
1183                 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
1184                                  advertising);
1185         if (eee_adv & MDIO_EEE_10GT)
1186                 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
1187                                  advertising);
1188         if (eee_adv & MDIO_EEE_1000KX)
1189                 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
1190                                  advertising);
1191         if (eee_adv & MDIO_EEE_10GKX4)
1192                 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
1193                                  advertising);
1194         if (eee_adv & MDIO_EEE_10GKR)
1195                 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
1196                                  advertising);
1197 }
1198
1199 /**
1200  * phy_init_eee - init and check the EEE feature
1201  * @phydev: target phy_device struct
1202  * @clk_stop_enable: PHY may stop the clock during LPI
1203  *
1204  * Description: it checks if the Energy-Efficient Ethernet (EEE)
1205  * is supported by looking at the MMD registers 3.20 and 7.60/61
1206  * and it programs the MMD register 3.0 setting the "Clock stop enable"
1207  * bit if required.
1208  */
1209 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1210 {
1211         if (!phydev->drv)
1212                 return -EIO;
1213
1214         /* According to 802.3az,the EEE is supported only in full duplex-mode.
1215          */
1216         if (phydev->duplex == DUPLEX_FULL) {
1217                 __ETHTOOL_DECLARE_LINK_MODE_MASK(common);
1218                 __ETHTOOL_DECLARE_LINK_MODE_MASK(lp);
1219                 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv);
1220                 int eee_lp, eee_cap, eee_adv;
1221                 int status;
1222                 u32 cap;
1223
1224                 /* Read phy status to properly get the right settings */
1225                 status = phy_read_status(phydev);
1226                 if (status)
1227                         return status;
1228
1229                 /* First check if the EEE ability is supported */
1230                 eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1231                 if (eee_cap <= 0)
1232                         goto eee_exit_err;
1233
1234                 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1235                 if (!cap)
1236                         goto eee_exit_err;
1237
1238                 /* Check which link settings negotiated and verify it in
1239                  * the EEE advertising registers.
1240                  */
1241                 eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1242                 if (eee_lp <= 0)
1243                         goto eee_exit_err;
1244
1245                 eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1246                 if (eee_adv <= 0)
1247                         goto eee_exit_err;
1248
1249                 mmd_eee_adv_to_linkmode(adv, eee_adv);
1250                 mmd_eee_adv_to_linkmode(lp, eee_lp);
1251                 linkmode_and(common, adv, lp);
1252
1253                 if (!phy_check_valid(phydev->speed, phydev->duplex, common))
1254                         goto eee_exit_err;
1255
1256                 if (clk_stop_enable)
1257                         /* Configure the PHY to stop receiving xMII
1258                          * clock while it is signaling LPI.
1259                          */
1260                         phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
1261                                          MDIO_PCS_CTRL1_CLKSTOP_EN);
1262
1263                 return 0; /* EEE supported */
1264         }
1265 eee_exit_err:
1266         return -EPROTONOSUPPORT;
1267 }
1268 EXPORT_SYMBOL(phy_init_eee);
1269
1270 /**
1271  * phy_get_eee_err - report the EEE wake error count
1272  * @phydev: target phy_device struct
1273  *
1274  * Description: it is to report the number of time where the PHY
1275  * failed to complete its normal wake sequence.
1276  */
1277 int phy_get_eee_err(struct phy_device *phydev)
1278 {
1279         if (!phydev->drv)
1280                 return -EIO;
1281
1282         return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
1283 }
1284 EXPORT_SYMBOL(phy_get_eee_err);
1285
1286 /**
1287  * phy_ethtool_get_eee - get EEE supported and status
1288  * @phydev: target phy_device struct
1289  * @data: ethtool_eee data
1290  *
1291  * Description: it reportes the Supported/Advertisement/LP Advertisement
1292  * capabilities.
1293  */
1294 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1295 {
1296         int val;
1297
1298         if (!phydev->drv)
1299                 return -EIO;
1300
1301         /* Get Supported EEE */
1302         val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1303         if (val < 0)
1304                 return val;
1305         data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1306
1307         /* Get advertisement EEE */
1308         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1309         if (val < 0)
1310                 return val;
1311         data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1312         data->eee_enabled = !!data->advertised;
1313
1314         /* Get LP advertisement EEE */
1315         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1316         if (val < 0)
1317                 return val;
1318         data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1319
1320         data->eee_active = !!(data->advertised & data->lp_advertised);
1321
1322         return 0;
1323 }
1324 EXPORT_SYMBOL(phy_ethtool_get_eee);
1325
1326 /**
1327  * phy_ethtool_set_eee - set EEE supported and status
1328  * @phydev: target phy_device struct
1329  * @data: ethtool_eee data
1330  *
1331  * Description: it is to program the Advertisement EEE register.
1332  */
1333 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1334 {
1335         int cap, old_adv, adv = 0, ret;
1336
1337         if (!phydev->drv)
1338                 return -EIO;
1339
1340         /* Get Supported EEE */
1341         cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1342         if (cap < 0)
1343                 return cap;
1344
1345         old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1346         if (old_adv < 0)
1347                 return old_adv;
1348
1349         if (data->eee_enabled) {
1350                 adv = !data->advertised ? cap :
1351                       ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
1352                 /* Mask prohibited EEE modes */
1353                 adv &= ~phydev->eee_broken_modes;
1354         }
1355
1356         if (old_adv != adv) {
1357                 ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1358                 if (ret < 0)
1359                         return ret;
1360
1361                 /* Restart autonegotiation so the new modes get sent to the
1362                  * link partner.
1363                  */
1364                 if (phydev->autoneg == AUTONEG_ENABLE) {
1365                         ret = phy_restart_aneg(phydev);
1366                         if (ret < 0)
1367                                 return ret;
1368                 }
1369         }
1370
1371         return 0;
1372 }
1373 EXPORT_SYMBOL(phy_ethtool_set_eee);
1374
1375 /**
1376  * phy_ethtool_set_wol - Configure Wake On LAN
1377  *
1378  * @phydev: target phy_device struct
1379  * @wol: Configuration requested
1380  */
1381 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1382 {
1383         if (phydev->drv && phydev->drv->set_wol)
1384                 return phydev->drv->set_wol(phydev, wol);
1385
1386         return -EOPNOTSUPP;
1387 }
1388 EXPORT_SYMBOL(phy_ethtool_set_wol);
1389
1390 /**
1391  * phy_ethtool_get_wol - Get the current Wake On LAN configuration
1392  *
1393  * @phydev: target phy_device struct
1394  * @wol: Store the current configuration here
1395  */
1396 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1397 {
1398         if (phydev->drv && phydev->drv->get_wol)
1399                 phydev->drv->get_wol(phydev, wol);
1400 }
1401 EXPORT_SYMBOL(phy_ethtool_get_wol);
1402
1403 int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1404                                    struct ethtool_link_ksettings *cmd)
1405 {
1406         struct phy_device *phydev = ndev->phydev;
1407
1408         if (!phydev)
1409                 return -ENODEV;
1410
1411         phy_ethtool_ksettings_get(phydev, cmd);
1412
1413         return 0;
1414 }
1415 EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1416
1417 int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1418                                    const struct ethtool_link_ksettings *cmd)
1419 {
1420         struct phy_device *phydev = ndev->phydev;
1421
1422         if (!phydev)
1423                 return -ENODEV;
1424
1425         return phy_ethtool_ksettings_set(phydev, cmd);
1426 }
1427 EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1428
1429 /**
1430  * phy_ethtool_nway_reset - Restart auto negotiation
1431  * @ndev: Network device to restart autoneg for
1432  */
1433 int phy_ethtool_nway_reset(struct net_device *ndev)
1434 {
1435         struct phy_device *phydev = ndev->phydev;
1436
1437         if (!phydev)
1438                 return -ENODEV;
1439
1440         if (!phydev->drv)
1441                 return -EIO;
1442
1443         return phy_restart_aneg(phydev);
1444 }
1445 EXPORT_SYMBOL(phy_ethtool_nway_reset);