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         if (autoneg == AUTONEG_DISABLE) {
 280                 phydev->speed = speed;
 281                 phydev->duplex = duplex;
 282         }
 283
 284         linkmode_copy(phydev->advertising, advertising);
 285
 286         linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
 287                          phydev->advertising, autoneg == AUTONEG_ENABLE);
 288
 289         phydev->master_slave_set = cmd->base.master_slave_cfg;
 290         phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
 291
 292         /* Restart the PHY */
 293         phy_start_aneg(phydev);
 294
 295         return 0;
 296 }
 297 EXPORT_SYMBOL(phy_ethtool_ksettings_set);
 298
 299 void phy_ethtool_ksettings_get(struct phy_device *phydev,
 300                                struct ethtool_link_ksettings *cmd)
 301 {
 302         linkmode_copy(cmd->link_modes.supported, phydev->supported);
 303         linkmode_copy(cmd->link_modes.advertising, phydev->advertising);
 304         linkmode_copy(cmd->link_modes.lp_advertising, phydev->lp_advertising);
 305
 306         cmd->base.speed = phydev->speed;
 307         cmd->base.duplex = phydev->duplex;
 308         cmd->base.master_slave_cfg = phydev->master_slave_get;
 309         cmd->base.master_slave_state = phydev->master_slave_state;
 310         if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
 311                 cmd->base.port = PORT_BNC;
 312         else
 313                 cmd->base.port = phydev->port;
 314         cmd->base.transceiver = phy_is_internal(phydev) ?
 315                                 XCVR_INTERNAL : XCVR_EXTERNAL;
 316         cmd->base.phy_address = phydev->mdio.addr;
 317         cmd->base.autoneg = phydev->autoneg;
 318         cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
 319         cmd->base.eth_tp_mdix = phydev->mdix;
 320 }
 321 EXPORT_SYMBOL(phy_ethtool_ksettings_get);
 322
 323 /**
 324  * phy_mii_ioctl - generic PHY MII ioctl interface
 325  * @phydev: the phy_device struct
 326  * @ifr: &struct ifreq for socket ioctl's
 327  * @cmd: ioctl cmd to execute
 328  *
 329  * Note that this function is currently incompatible with the
 330  * PHYCONTROL layer.  It changes registers without regard to
 331  * current state.  Use at own risk.
 332  */
 333 int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
 334 {
 335         struct mii_ioctl_data *mii_data = if_mii(ifr);
 336         u16 val = mii_data->val_in;
 337         bool change_autoneg = false;
 338         int prtad, devad;
 339
 340         switch (cmd) {
 341         case SIOCGMIIPHY:
 342                 mii_data->phy_id = phydev->mdio.addr;
 343                 fallthrough;
 344
 345         case SIOCGMIIREG:
 346                 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
 347                         prtad = mdio_phy_id_prtad(mii_data->phy_id);
 348                         devad = mdio_phy_id_devad(mii_data->phy_id);
 349                         devad = mdiobus_c45_addr(devad, mii_data->reg_num);
 350                 } else {
 351                         prtad = mii_data->phy_id;
 352                         devad = mii_data->reg_num;
 353                 }
 354                 mii_data->val_out = mdiobus_read(phydev->mdio.bus, prtad,
 355                                                  devad);
 356                 return 0;
 357
 358         case SIOCSMIIREG:
 359                 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
 360                         prtad = mdio_phy_id_prtad(mii_data->phy_id);
 361                         devad = mdio_phy_id_devad(mii_data->phy_id);
 362                         devad = mdiobus_c45_addr(devad, mii_data->reg_num);
 363                 } else {
 364                         prtad = mii_data->phy_id;
 365                         devad = mii_data->reg_num;
 366                 }
 367                 if (prtad == phydev->mdio.addr) {
 368                         switch (devad) {
 369                         case MII_BMCR:
 370                                 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
 371                                         if (phydev->autoneg == AUTONEG_ENABLE)
 372                                                 change_autoneg = true;
 373                                         phydev->autoneg = AUTONEG_DISABLE;
 374                                         if (val & BMCR_FULLDPLX)
 375                                                 phydev->duplex = DUPLEX_FULL;
 376                                         else
 377                                                 phydev->duplex = DUPLEX_HALF;
 378                                         if (val & BMCR_SPEED1000)
 379                                                 phydev->speed = SPEED_1000;
 380                                         else if (val & BMCR_SPEED100)
 381                                                 phydev->speed = SPEED_100;
 382                                         else phydev->speed = SPEED_10;
 383                                 } else {
 384                                         if (phydev->autoneg == AUTONEG_DISABLE)
 385                                                 change_autoneg = true;
 386                                         phydev->autoneg = AUTONEG_ENABLE;
 387                                 }
 388                                 break;
 389                         case MII_ADVERTISE:
 390                                 mii_adv_mod_linkmode_adv_t(phydev->advertising,
 391                                                            val);
 392                                 change_autoneg = true;
 393                                 break;
 394                         case MII_CTRL1000:
 395                                 mii_ctrl1000_mod_linkmode_adv_t(phydev->advertising,
 396                                                                 val);
 397                                 change_autoneg = true;
 398                                 break;
 399                         default:
 400                                 /* do nothing */
 401                                 break;
 402                         }
 403                 }
 404
 405                 mdiobus_write(phydev->mdio.bus, prtad, devad, val);
 406
 407                 if (prtad == phydev->mdio.addr &&
 408                     devad == MII_BMCR &&
 409                     val & BMCR_RESET)
 410                         return phy_init_hw(phydev);
 411
 412                 if (change_autoneg)
 413                         return phy_start_aneg(phydev);
 414
 415                 return 0;
 416
 417         case SIOCSHWTSTAMP:
 418                 if (phydev->mii_ts && phydev->mii_ts->hwtstamp)
 419                         return phydev->mii_ts->hwtstamp(phydev->mii_ts, ifr);
 420                 fallthrough;
 421
 422         default:
 423                 return -EOPNOTSUPP;
 424         }
 425 }
 426 EXPORT_SYMBOL(phy_mii_ioctl);
 427
 428 /**
 429  * phy_do_ioctl - generic ndo_eth_ioctl implementation
 430  * @dev: the net_device struct
 431  * @ifr: &struct ifreq for socket ioctl's
 432  * @cmd: ioctl cmd to execute
 433  */
 434 int phy_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 435 {
 436         if (!dev->phydev)
 437                 return -ENODEV;
 438
 439         return phy_mii_ioctl(dev->phydev, ifr, cmd);
 440 }
 441 EXPORT_SYMBOL(phy_do_ioctl);
 442
 443 /**
 444  * phy_do_ioctl_running - generic ndo_eth_ioctl implementation but test first
 445  *
 446  * @dev: the net_device struct
 447  * @ifr: &struct ifreq for socket ioctl's
 448  * @cmd: ioctl cmd to execute
 449  *
 450  * Same as phy_do_ioctl, but ensures that net_device is running before
 451  * handling the ioctl.
 452  */
 453 int phy_do_ioctl_running(struct net_device *dev, struct ifreq *ifr, int cmd)
 454 {
 455         if (!netif_running(dev))
 456                 return -ENODEV;
 457
 458         return phy_do_ioctl(dev, ifr, cmd);
 459 }
 460 EXPORT_SYMBOL(phy_do_ioctl_running);
 461
 462 /**
 463  * phy_queue_state_machine - Trigger the state machine to run soon
 464  *
 465  * @phydev: the phy_device struct
 466  * @jiffies: Run the state machine after these jiffies
 467  */
 468 void phy_queue_state_machine(struct phy_device *phydev, unsigned long jiffies)
 469 {
 470         mod_delayed_work(system_power_efficient_wq, &phydev->state_queue,
 471                          jiffies);
 472 }
 473 EXPORT_SYMBOL(phy_queue_state_machine);
 474
 475 /**
 476  * phy_trigger_machine - Trigger the state machine to run now
 477  *
 478  * @phydev: the phy_device struct
 479  */
 480 void phy_trigger_machine(struct phy_device *phydev)
 481 {
 482         phy_queue_state_machine(phydev, 0);
 483 }
 484 EXPORT_SYMBOL(phy_trigger_machine);
 485
 486 static void phy_abort_cable_test(struct phy_device *phydev)
 487 {
 488         int err;
 489
 490         ethnl_cable_test_finished(phydev);
 491
 492         err = phy_init_hw(phydev);
 493         if (err)
 494                 phydev_err(phydev, "Error while aborting cable test");
 495 }
 496
 497 /**
 498  * phy_ethtool_get_strings - Get the statistic counter names
 499  *
 500  * @phydev: the phy_device struct
 501  * @data: Where to put the strings
 502  */
 503 int phy_ethtool_get_strings(struct phy_device *phydev, u8 *data)
 504 {
 505         if (!phydev->drv)
 506                 return -EIO;
 507
 508         mutex_lock(&phydev->lock);
 509         phydev->drv->get_strings(phydev, data);
 510         mutex_unlock(&phydev->lock);
 511
 512         return 0;
 513 }
 514 EXPORT_SYMBOL(phy_ethtool_get_strings);
 515
 516 /**
 517  * phy_ethtool_get_sset_count - Get the number of statistic counters
 518  *
 519  * @phydev: the phy_device struct
 520  */
 521 int phy_ethtool_get_sset_count(struct phy_device *phydev)
 522 {
 523         int ret;
 524
 525         if (!phydev->drv)
 526                 return -EIO;
 527
 528         if (phydev->drv->get_sset_count &&
 529             phydev->drv->get_strings &&
 530             phydev->drv->get_stats) {
 531                 mutex_lock(&phydev->lock);
 532                 ret = phydev->drv->get_sset_count(phydev);
 533                 mutex_unlock(&phydev->lock);
 534
 535                 return ret;
 536         }
 537
 538         return -EOPNOTSUPP;
 539 }
 540 EXPORT_SYMBOL(phy_ethtool_get_sset_count);
 541
 542 /**
 543  * phy_ethtool_get_stats - Get the statistic counters
 544  *
 545  * @phydev: the phy_device struct
 546  * @stats: What counters to get
 547  * @data: Where to store the counters
 548  */
 549 int phy_ethtool_get_stats(struct phy_device *phydev,
 550                           struct ethtool_stats *stats, u64 *data)
 551 {
 552         if (!phydev->drv)
 553                 return -EIO;
 554
 555         mutex_lock(&phydev->lock);
 556         phydev->drv->get_stats(phydev, stats, data);
 557         mutex_unlock(&phydev->lock);
 558
 559         return 0;
 560 }
 561 EXPORT_SYMBOL(phy_ethtool_get_stats);
 562
 563 /**
 564  * phy_start_cable_test - Start a cable test
 565  *
 566  * @phydev: the phy_device struct
 567  * @extack: extack for reporting useful error messages
 568  */
 569 int phy_start_cable_test(struct phy_device *phydev,
 570                          struct netlink_ext_ack *extack)
 571 {
 572         struct net_device *dev = phydev->attached_dev;
 573         int err = -ENOMEM;
 574
 575         if (!(phydev->drv &&
 576               phydev->drv->cable_test_start &&
 577               phydev->drv->cable_test_get_status)) {
 578                 NL_SET_ERR_MSG(extack,
 579                                "PHY driver does not support cable testing");
 580                 return -EOPNOTSUPP;
 581         }
 582
 583         mutex_lock(&phydev->lock);
 584         if (phydev->state == PHY_CABLETEST) {
 585                 NL_SET_ERR_MSG(extack,
 586                                "PHY already performing a test");
 587                 err = -EBUSY;
 588                 goto out;
 589         }
 590
 591         if (phydev->state < PHY_UP ||
 592             phydev->state > PHY_CABLETEST) {
 593                 NL_SET_ERR_MSG(extack,
 594                                "PHY not configured. Try setting interface up");
 595                 err = -EBUSY;
 596                 goto out;
 597         }
 598
 599         err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF);
 600         if (err)
 601                 goto out;
 602
 603         /* Mark the carrier down until the test is complete */
 604         phy_link_down(phydev);
 605
 606         netif_testing_on(dev);
 607         err = phydev->drv->cable_test_start(phydev);
 608         if (err) {
 609                 netif_testing_off(dev);
 610                 phy_link_up(phydev);
 611                 goto out_free;
 612         }
 613
 614         phydev->state = PHY_CABLETEST;
 615
 616         if (phy_polling_mode(phydev))
 617                 phy_trigger_machine(phydev);
 618
 619         mutex_unlock(&phydev->lock);
 620
 621         return 0;
 622
 623 out_free:
 624         ethnl_cable_test_free(phydev);
 625 out:
 626         mutex_unlock(&phydev->lock);
 627
 628         return err;
 629 }
 630 EXPORT_SYMBOL(phy_start_cable_test);
 631
 632 /**
 633  * phy_start_cable_test_tdr - Start a raw TDR cable test
 634  *
 635  * @phydev: the phy_device struct
 636  * @extack: extack for reporting useful error messages
 637  * @config: Configuration of the test to run
 638  */
 639 int phy_start_cable_test_tdr(struct phy_device *phydev,
 640                              struct netlink_ext_ack *extack,
 641                              const struct phy_tdr_config *config)
 642 {
 643         struct net_device *dev = phydev->attached_dev;
 644         int err = -ENOMEM;
 645
 646         if (!(phydev->drv &&
 647               phydev->drv->cable_test_tdr_start &&
 648               phydev->drv->cable_test_get_status)) {
 649                 NL_SET_ERR_MSG(extack,
 650                                "PHY driver does not support cable test TDR");
 651                 return -EOPNOTSUPP;
 652         }
 653
 654         mutex_lock(&phydev->lock);
 655         if (phydev->state == PHY_CABLETEST) {
 656                 NL_SET_ERR_MSG(extack,
 657                                "PHY already performing a test");
 658                 err = -EBUSY;
 659                 goto out;
 660         }
 661
 662         if (phydev->state < PHY_UP ||
 663             phydev->state > PHY_CABLETEST) {
 664                 NL_SET_ERR_MSG(extack,
 665                                "PHY not configured. Try setting interface up");
 666                 err = -EBUSY;
 667                 goto out;
 668         }
 669
 670         err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
 671         if (err)
 672                 goto out;
 673
 674         /* Mark the carrier down until the test is complete */
 675         phy_link_down(phydev);
 676
 677         netif_testing_on(dev);
 678         err = phydev->drv->cable_test_tdr_start(phydev, config);
 679         if (err) {
 680                 netif_testing_off(dev);
 681                 phy_link_up(phydev);
 682                 goto out_free;
 683         }
 684
 685         phydev->state = PHY_CABLETEST;
 686
 687         if (phy_polling_mode(phydev))
 688                 phy_trigger_machine(phydev);
 689
 690         mutex_unlock(&phydev->lock);
 691
 692         return 0;
 693
 694 out_free:
 695         ethnl_cable_test_free(phydev);
 696 out:
 697         mutex_unlock(&phydev->lock);
 698
 699         return err;
 700 }
 701 EXPORT_SYMBOL(phy_start_cable_test_tdr);
 702
 703 int phy_config_aneg(struct phy_device *phydev)
 704 {
 705         if (phydev->drv->config_aneg)
 706                 return phydev->drv->config_aneg(phydev);
 707
 708         /* Clause 45 PHYs that don't implement Clause 22 registers are not
 709          * allowed to call genphy_config_aneg()
 710          */
 711         if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
 712                 return genphy_c45_config_aneg(phydev);
 713
 714         return genphy_config_aneg(phydev);
 715 }
 716 EXPORT_SYMBOL(phy_config_aneg);
 717
 718 /**
 719  * phy_check_link_status - check link status and set state accordingly
 720  * @phydev: the phy_device struct
 721  *
 722  * Description: Check for link and whether autoneg was triggered / is running
 723  * and set state accordingly
 724  */
 725 static int phy_check_link_status(struct phy_device *phydev)
 726 {
 727         int err;
 728
 729         lockdep_assert_held(&phydev->lock);
 730
 731         /* Keep previous state if loopback is enabled because some PHYs
 732          * report that Link is Down when loopback is enabled.
 733          */
 734         if (phydev->loopback_enabled)
 735                 return 0;
 736
 737         err = phy_read_status(phydev);
 738         if (err)
 739                 return err;
 740
 741         if (phydev->link && phydev->state != PHY_RUNNING) {
 742                 phy_check_downshift(phydev);
 743                 phydev->state = PHY_RUNNING;
 744                 phy_link_up(phydev);
 745         } else if (!phydev->link && phydev->state != PHY_NOLINK) {
 746                 phydev->state = PHY_NOLINK;
 747                 phy_link_down(phydev);
 748         }
 749
 750         return 0;
 751 }
 752
 753 /**
 754  * phy_start_aneg - start auto-negotiation for this PHY device
 755  * @phydev: the phy_device struct
 756  *
 757  * Description: Sanitizes the settings (if we're not autonegotiating
 758  *   them), and then calls the driver's config_aneg function.
 759  *   If the PHYCONTROL Layer is operating, we change the state to
 760  *   reflect the beginning of Auto-negotiation or forcing.
 761  */
 762 int phy_start_aneg(struct phy_device *phydev)
 763 {
 764         int err;
 765
 766         if (!phydev->drv)
 767                 return -EIO;
 768
 769         mutex_lock(&phydev->lock);
 770
 771         if (AUTONEG_DISABLE == phydev->autoneg)
 772                 phy_sanitize_settings(phydev);
 773
 774         err = phy_config_aneg(phydev);
 775         if (err < 0)
 776                 goto out_unlock;
 777
 778         if (phy_is_started(phydev))
 779                 err = phy_check_link_status(phydev);
 780 out_unlock:
 781         mutex_unlock(&phydev->lock);
 782
 783         return err;
 784 }
 785 EXPORT_SYMBOL(phy_start_aneg);
 786
 787 static int phy_poll_aneg_done(struct phy_device *phydev)
 788 {
 789         unsigned int retries = 100;
 790         int ret;
 791
 792         do {
 793                 msleep(100);
 794                 ret = phy_aneg_done(phydev);
 795         } while (!ret && --retries);
 796
 797         if (!ret)
 798                 return -ETIMEDOUT;
 799
 800         return ret < 0 ? ret : 0;
 801 }
 802
 803 /**
 804  * phy_speed_down - set speed to lowest speed supported by both link partners
 805  * @phydev: the phy_device struct
 806  * @sync: perform action synchronously
 807  *
 808  * Description: Typically used to save energy when waiting for a WoL packet
 809  *
 810  * WARNING: Setting sync to false may cause the system being unable to suspend
 811  * in case the PHY generates an interrupt when finishing the autonegotiation.
 812  * This interrupt may wake up the system immediately after suspend.
 813  * Therefore use sync = false only if you're sure it's safe with the respective
 814  * network chip.
 815  */
 816 int phy_speed_down(struct phy_device *phydev, bool sync)
 817 {
 818         __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
 819         int ret;
 820
 821         if (phydev->autoneg != AUTONEG_ENABLE)
 822                 return 0;
 823
 824         linkmode_copy(adv_tmp, phydev->advertising);
 825
 826         ret = phy_speed_down_core(phydev);
 827         if (ret)
 828                 return ret;
 829
 830         linkmode_copy(phydev->adv_old, adv_tmp);
 831
 832         if (linkmode_equal(phydev->advertising, adv_tmp))
 833                 return 0;
 834
 835         ret = phy_config_aneg(phydev);
 836         if (ret)
 837                 return ret;
 838
 839         return sync ? phy_poll_aneg_done(phydev) : 0;
 840 }
 841 EXPORT_SYMBOL_GPL(phy_speed_down);
 842
 843 /**
 844  * phy_speed_up - (re)set advertised speeds to all supported speeds
 845  * @phydev: the phy_device struct
 846  *
 847  * Description: Used to revert the effect of phy_speed_down
 848  */
 849 int phy_speed_up(struct phy_device *phydev)
 850 {
 851         __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
 852
 853         if (phydev->autoneg != AUTONEG_ENABLE)
 854                 return 0;
 855
 856         if (linkmode_empty(phydev->adv_old))
 857                 return 0;
 858
 859         linkmode_copy(adv_tmp, phydev->advertising);
 860         linkmode_copy(phydev->advertising, phydev->adv_old);
 861         linkmode_zero(phydev->adv_old);
 862
 863         if (linkmode_equal(phydev->advertising, adv_tmp))
 864                 return 0;
 865
 866         return phy_config_aneg(phydev);
 867 }
 868 EXPORT_SYMBOL_GPL(phy_speed_up);
 869
 870 /**
 871  * phy_start_machine - start PHY state machine tracking
 872  * @phydev: the phy_device struct
 873  *
 874  * Description: The PHY infrastructure can run a state machine
 875  *   which tracks whether the PHY is starting up, negotiating,
 876  *   etc.  This function starts the delayed workqueue which tracks
 877  *   the state of the PHY. If you want to maintain your own state machine,
 878  *   do not call this function.
 879  */
 880 void phy_start_machine(struct phy_device *phydev)
 881 {
 882         phy_trigger_machine(phydev);
 883 }
 884 EXPORT_SYMBOL_GPL(phy_start_machine);
 885
 886 /**
 887  * phy_stop_machine - stop the PHY state machine tracking
 888  * @phydev: target phy_device struct
 889  *
 890  * Description: Stops the state machine delayed workqueue, sets the
 891  *   state to UP (unless it wasn't up yet). This function must be
 892  *   called BEFORE phy_detach.
 893  */
 894 void phy_stop_machine(struct phy_device *phydev)
 895 {
 896         cancel_delayed_work_sync(&phydev->state_queue);
 897
 898         mutex_lock(&phydev->lock);
 899         if (phy_is_started(phydev))
 900                 phydev->state = PHY_UP;
 901         mutex_unlock(&phydev->lock);
 902 }
 903
 904 /**
 905  * phy_error - enter HALTED state for this PHY device
 906  * @phydev: target phy_device struct
 907  *
 908  * Moves the PHY to the HALTED state in response to a read
 909  * or write error, and tells the controller the link is down.
 910  * Must not be called from interrupt context, or while the
 911  * phydev->lock is held.
 912  */
 913 void phy_error(struct phy_device *phydev)
 914 {
 915         WARN_ON(1);
 916
 917         mutex_lock(&phydev->lock);
 918         phydev->state = PHY_HALTED;
 919         mutex_unlock(&phydev->lock);
 920
 921         phy_trigger_machine(phydev);
 922 }
 923 EXPORT_SYMBOL(phy_error);
 924
 925 /**
 926  * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
 927  * @phydev: target phy_device struct
 928  */
 929 int phy_disable_interrupts(struct phy_device *phydev)
 930 {
 931         /* Disable PHY interrupts */
 932         return phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 933 }
 934
 935 /**
 936  * phy_interrupt - PHY interrupt handler
 937  * @irq: interrupt line
 938  * @phy_dat: phy_device pointer
 939  *
 940  * Description: Handle PHY interrupt
 941  */
 942 static irqreturn_t phy_interrupt(int irq, void *phy_dat)
 943 {
 944         struct phy_device *phydev = phy_dat;
 945         struct phy_driver *drv = phydev->drv;
 946
 947         return drv->handle_interrupt(phydev);
 948 }
 949
 950 /**
 951  * phy_enable_interrupts - Enable the interrupts from the PHY side
 952  * @phydev: target phy_device struct
 953  */
 954 static int phy_enable_interrupts(struct phy_device *phydev)
 955 {
 956         return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
 957 }
 958
 959 /**
 960  * phy_request_interrupt - request and enable interrupt for a PHY device
 961  * @phydev: target phy_device struct
 962  *
 963  * Description: Request and enable the interrupt for the given PHY.
 964  *   If this fails, then we set irq to PHY_POLL.
 965  *   This should only be called with a valid IRQ number.
 966  */
 967 void phy_request_interrupt(struct phy_device *phydev)
 968 {
 969         int err;
 970
 971         err = request_threaded_irq(phydev->irq, NULL, phy_interrupt,
 972                                    IRQF_ONESHOT | IRQF_SHARED,
 973                                    phydev_name(phydev), phydev);
 974         if (err) {
 975                 phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n",
 976                             err, phydev->irq);
 977                 phydev->irq = PHY_POLL;
 978         } else {
 979                 if (phy_enable_interrupts(phydev)) {
 980                         phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n");
 981                         phy_free_interrupt(phydev);
 982                         phydev->irq = PHY_POLL;
 983                 }
 984         }
 985 }
 986 EXPORT_SYMBOL(phy_request_interrupt);
 987
 988 /**
 989  * phy_free_interrupt - disable and free interrupt for a PHY device
 990  * @phydev: target phy_device struct
 991  *
 992  * Description: Disable and free the interrupt for the given PHY.
 993  *   This should only be called with a valid IRQ number.
 994  */
 995 void phy_free_interrupt(struct phy_device *phydev)
 996 {
 997         phy_disable_interrupts(phydev);
 998         free_irq(phydev->irq, phydev);
 999 }
1000 EXPORT_SYMBOL(phy_free_interrupt);
1001
1002 /**
1003  * phy_stop - Bring down the PHY link, and stop checking the status
1004  * @phydev: target phy_device struct
1005  */
1006 void phy_stop(struct phy_device *phydev)
1007 {
1008         struct net_device *dev = phydev->attached_dev;
1009
1010         if (!phy_is_started(phydev) && phydev->state != PHY_DOWN) {
1011                 WARN(1, "called from state %s\n",
1012                      phy_state_to_str(phydev->state));
1013                 return;
1014         }
1015
1016         mutex_lock(&phydev->lock);
1017
1018         if (phydev->state == PHY_CABLETEST) {
1019                 phy_abort_cable_test(phydev);
1020                 netif_testing_off(dev);
1021         }
1022
1023         if (phydev->sfp_bus)
1024                 sfp_upstream_stop(phydev->sfp_bus);
1025
1026         phydev->state = PHY_HALTED;
1027
1028         mutex_unlock(&phydev->lock);
1029
1030         phy_state_machine(&phydev->state_queue.work);
1031         phy_stop_machine(phydev);
1032
1033         /* Cannot call flush_scheduled_work() here as desired because
1034          * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler
1035          * will not reenable interrupts.
1036          */
1037 }
1038 EXPORT_SYMBOL(phy_stop);
1039
1040 /**
1041  * phy_start - start or restart a PHY device
1042  * @phydev: target phy_device struct
1043  *
1044  * Description: Indicates the attached device's readiness to
1045  *   handle PHY-related work.  Used during startup to start the
1046  *   PHY, and after a call to phy_stop() to resume operation.
1047  *   Also used to indicate the MDIO bus has cleared an error
1048  *   condition.
1049  */
1050 void phy_start(struct phy_device *phydev)
1051 {
1052         mutex_lock(&phydev->lock);
1053
1054         if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
1055                 WARN(1, "called from state %s\n",
1056                      phy_state_to_str(phydev->state));
1057                 goto out;
1058         }
1059
1060         if (phydev->sfp_bus)
1061                 sfp_upstream_start(phydev->sfp_bus);
1062
1063         /* if phy was suspended, bring the physical link up again */
1064         __phy_resume(phydev);
1065
1066         phydev->state = PHY_UP;
1067
1068         phy_start_machine(phydev);
1069 out:
1070         mutex_unlock(&phydev->lock);
1071 }
1072 EXPORT_SYMBOL(phy_start);
1073
1074 /**
1075  * phy_state_machine - Handle the state machine
1076  * @work: work_struct that describes the work to be done
1077  */
1078 void phy_state_machine(struct work_struct *work)
1079 {
1080         struct delayed_work *dwork = to_delayed_work(work);
1081         struct phy_device *phydev =
1082                         container_of(dwork, struct phy_device, state_queue);
1083         struct net_device *dev = phydev->attached_dev;
1084         bool needs_aneg = false, do_suspend = false;
1085         enum phy_state old_state;
1086         bool finished = false;
1087         int err = 0;
1088
1089         mutex_lock(&phydev->lock);
1090
1091         old_state = phydev->state;
1092
1093         switch (phydev->state) {
1094         case PHY_DOWN:
1095         case PHY_READY:
1096                 break;
1097         case PHY_UP:
1098                 needs_aneg = true;
1099
1100                 break;
1101         case PHY_NOLINK:
1102         case PHY_RUNNING:
1103                 err = phy_check_link_status(phydev);
1104                 break;
1105         case PHY_CABLETEST:
1106                 err = phydev->drv->cable_test_get_status(phydev, &finished);
1107                 if (err) {
1108                         phy_abort_cable_test(phydev);
1109                         netif_testing_off(dev);
1110                         needs_aneg = true;
1111                         phydev->state = PHY_UP;
1112                         break;
1113                 }
1114
1115                 if (finished) {
1116                         ethnl_cable_test_finished(phydev);
1117                         netif_testing_off(dev);
1118                         needs_aneg = true;
1119                         phydev->state = PHY_UP;
1120                 }
1121                 break;
1122         case PHY_HALTED:
1123                 if (phydev->link) {
1124                         phydev->link = 0;
1125                         phy_link_down(phydev);
1126                 }
1127                 do_suspend = true;
1128                 break;
1129         }
1130
1131         mutex_unlock(&phydev->lock);
1132
1133         if (needs_aneg)
1134                 err = phy_start_aneg(phydev);
1135         else if (do_suspend)
1136                 phy_suspend(phydev);
1137
1138         if (err == -ENODEV)
1139                 return;
1140
1141         if (err < 0)
1142                 phy_error(phydev);
1143
1144         if (old_state != phydev->state) {
1145                 phydev_dbg(phydev, "PHY state change %s -> %s\n",
1146                            phy_state_to_str(old_state),
1147                            phy_state_to_str(phydev->state));
1148                 if (phydev->drv && phydev->drv->link_change_notify)
1149                         phydev->drv->link_change_notify(phydev);
1150         }
1151
1152         /* Only re-schedule a PHY state machine change if we are polling the
1153          * PHY, if PHY_MAC_INTERRUPT is set, then we will be moving
1154          * between states from phy_mac_interrupt().
1155          *
1156          * In state PHY_HALTED the PHY gets suspended, so rescheduling the
1157          * state machine would be pointless and possibly error prone when
1158          * called from phy_disconnect() synchronously.
1159          */
1160         mutex_lock(&phydev->lock);
1161         if (phy_polling_mode(phydev) && phy_is_started(phydev))
1162                 phy_queue_state_machine(phydev, PHY_STATE_TIME);
1163         mutex_unlock(&phydev->lock);
1164 }
1165
1166 /**
1167  * phy_mac_interrupt - MAC says the link has changed
1168  * @phydev: phy_device struct with changed link
1169  *
1170  * The MAC layer is able to indicate there has been a change in the PHY link
1171  * status. Trigger the state machine and work a work queue.
1172  */
1173 void phy_mac_interrupt(struct phy_device *phydev)
1174 {
1175         /* Trigger a state machine change */
1176         phy_trigger_machine(phydev);
1177 }
1178 EXPORT_SYMBOL(phy_mac_interrupt);
1179
1180 static void mmd_eee_adv_to_linkmode(unsigned long *advertising, u16 eee_adv)
1181 {
1182         linkmode_zero(advertising);
1183
1184         if (eee_adv & MDIO_EEE_100TX)
1185                 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
1186                                  advertising);
1187         if (eee_adv & MDIO_EEE_1000T)
1188                 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
1189                                  advertising);
1190         if (eee_adv & MDIO_EEE_10GT)
1191                 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
1192                                  advertising);
1193         if (eee_adv & MDIO_EEE_1000KX)
1194                 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
1195                                  advertising);
1196         if (eee_adv & MDIO_EEE_10GKX4)
1197                 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
1198                                  advertising);
1199         if (eee_adv & MDIO_EEE_10GKR)
1200                 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
1201                                  advertising);
1202 }
1203
1204 /**
1205  * phy_init_eee - init and check the EEE feature
1206  * @phydev: target phy_device struct
1207  * @clk_stop_enable: PHY may stop the clock during LPI
1208  *
1209  * Description: it checks if the Energy-Efficient Ethernet (EEE)
1210  * is supported by looking at the MMD registers 3.20 and 7.60/61
1211  * and it programs the MMD register 3.0 setting the "Clock stop enable"
1212  * bit if required.
1213  */
1214 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1215 {
1216         if (!phydev->drv)
1217                 return -EIO;
1218
1219         /* According to 802.3az,the EEE is supported only in full duplex-mode.
1220          */
1221         if (phydev->duplex == DUPLEX_FULL) {
1222                 __ETHTOOL_DECLARE_LINK_MODE_MASK(common);
1223                 __ETHTOOL_DECLARE_LINK_MODE_MASK(lp);
1224                 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv);
1225                 int eee_lp, eee_cap, eee_adv;
1226                 int status;
1227                 u32 cap;
1228
1229                 /* Read phy status to properly get the right settings */
1230                 status = phy_read_status(phydev);
1231                 if (status)
1232                         return status;
1233
1234                 /* First check if the EEE ability is supported */
1235                 eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1236                 if (eee_cap <= 0)
1237                         goto eee_exit_err;
1238
1239                 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1240                 if (!cap)
1241                         goto eee_exit_err;
1242
1243                 /* Check which link settings negotiated and verify it in
1244                  * the EEE advertising registers.
1245                  */
1246                 eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1247                 if (eee_lp <= 0)
1248                         goto eee_exit_err;
1249
1250                 eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1251                 if (eee_adv <= 0)
1252                         goto eee_exit_err;
1253
1254                 mmd_eee_adv_to_linkmode(adv, eee_adv);
1255                 mmd_eee_adv_to_linkmode(lp, eee_lp);
1256                 linkmode_and(common, adv, lp);
1257
1258                 if (!phy_check_valid(phydev->speed, phydev->duplex, common))
1259                         goto eee_exit_err;
1260
1261                 if (clk_stop_enable)
1262                         /* Configure the PHY to stop receiving xMII
1263                          * clock while it is signaling LPI.
1264                          */
1265                         phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
1266                                          MDIO_PCS_CTRL1_CLKSTOP_EN);
1267
1268                 return 0; /* EEE supported */
1269         }
1270 eee_exit_err:
1271         return -EPROTONOSUPPORT;
1272 }
1273 EXPORT_SYMBOL(phy_init_eee);
1274
1275 /**
1276  * phy_get_eee_err - report the EEE wake error count
1277  * @phydev: target phy_device struct
1278  *
1279  * Description: it is to report the number of time where the PHY
1280  * failed to complete its normal wake sequence.
1281  */
1282 int phy_get_eee_err(struct phy_device *phydev)
1283 {
1284         if (!phydev->drv)
1285                 return -EIO;
1286
1287         return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
1288 }
1289 EXPORT_SYMBOL(phy_get_eee_err);
1290
1291 /**
1292  * phy_ethtool_get_eee - get EEE supported and status
1293  * @phydev: target phy_device struct
1294  * @data: ethtool_eee data
1295  *
1296  * Description: it reportes the Supported/Advertisement/LP Advertisement
1297  * capabilities.
1298  */
1299 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1300 {
1301         int val;
1302
1303         if (!phydev->drv)
1304                 return -EIO;
1305
1306         /* Get Supported EEE */
1307         val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1308         if (val < 0)
1309                 return val;
1310         data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1311
1312         /* Get advertisement EEE */
1313         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1314         if (val < 0)
1315                 return val;
1316         data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1317         data->eee_enabled = !!data->advertised;
1318
1319         /* Get LP advertisement EEE */
1320         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1321         if (val < 0)
1322                 return val;
1323         data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1324
1325         data->eee_active = !!(data->advertised & data->lp_advertised);
1326
1327         return 0;
1328 }
1329 EXPORT_SYMBOL(phy_ethtool_get_eee);
1330
1331 /**
1332  * phy_ethtool_set_eee - set EEE supported and status
1333  * @phydev: target phy_device struct
1334  * @data: ethtool_eee data
1335  *
1336  * Description: it is to program the Advertisement EEE register.
1337  */
1338 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1339 {
1340         int cap, old_adv, adv = 0, ret;
1341
1342         if (!phydev->drv)
1343                 return -EIO;
1344
1345         /* Get Supported EEE */
1346         cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1347         if (cap < 0)
1348                 return cap;
1349
1350         old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1351         if (old_adv < 0)
1352                 return old_adv;
1353
1354         if (data->eee_enabled) {
1355                 adv = !data->advertised ? cap :
1356                       ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
1357                 /* Mask prohibited EEE modes */
1358                 adv &= ~phydev->eee_broken_modes;
1359         }
1360
1361         if (old_adv != adv) {
1362                 ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1363                 if (ret < 0)
1364                         return ret;
1365
1366                 /* Restart autonegotiation so the new modes get sent to the
1367                  * link partner.
1368                  */
1369                 if (phydev->autoneg == AUTONEG_ENABLE) {
1370                         ret = phy_restart_aneg(phydev);
1371                         if (ret < 0)
1372                                 return ret;
1373                 }
1374         }
1375
1376         return 0;
1377 }
1378 EXPORT_SYMBOL(phy_ethtool_set_eee);
1379
1380 /**
1381  * phy_ethtool_set_wol - Configure Wake On LAN
1382  *
1383  * @phydev: target phy_device struct
1384  * @wol: Configuration requested
1385  */
1386 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1387 {
1388         if (phydev->drv && phydev->drv->set_wol)
1389                 return phydev->drv->set_wol(phydev, wol);
1390
1391         return -EOPNOTSUPP;
1392 }
1393 EXPORT_SYMBOL(phy_ethtool_set_wol);
1394
1395 /**
1396  * phy_ethtool_get_wol - Get the current Wake On LAN configuration
1397  *
1398  * @phydev: target phy_device struct
1399  * @wol: Store the current configuration here
1400  */
1401 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1402 {
1403         if (phydev->drv && phydev->drv->get_wol)
1404                 phydev->drv->get_wol(phydev, wol);
1405 }
1406 EXPORT_SYMBOL(phy_ethtool_get_wol);
1407
1408 int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1409                                    struct ethtool_link_ksettings *cmd)
1410 {
1411         struct phy_device *phydev = ndev->phydev;
1412
1413         if (!phydev)
1414                 return -ENODEV;
1415
1416         phy_ethtool_ksettings_get(phydev, cmd);
1417
1418         return 0;
1419 }
1420 EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1421
1422 int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1423                                    const struct ethtool_link_ksettings *cmd)
1424 {
1425         struct phy_device *phydev = ndev->phydev;
1426
1427         if (!phydev)
1428                 return -ENODEV;
1429
1430         return phy_ethtool_ksettings_set(phydev, cmd);
1431 }
1432 EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1433
1434 /**
1435  * phy_ethtool_nway_reset - Restart auto negotiation
1436  * @ndev: Network device to restart autoneg for
1437  */
1438 int phy_ethtool_nway_reset(struct net_device *ndev)
1439 {
1440         struct phy_device *phydev = ndev->phydev;
1441
1442         if (!phydev)
1443                 return -ENODEV;
1444
1445         if (!phydev->drv)
1446                 return -EIO;
1447
1448         return phy_restart_aneg(phydev);
1449 }
1450 EXPORT_SYMBOL(phy_ethtool_nway_reset);