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 void phy_ethtool_ksettings_get(struct phy_device *phydev,
 247                                struct ethtool_link_ksettings *cmd)
 248 {
 249         mutex_lock(&phydev->lock);
 250         linkmode_copy(cmd->link_modes.supported, phydev->supported);
 251         linkmode_copy(cmd->link_modes.advertising, phydev->advertising);
 252         linkmode_copy(cmd->link_modes.lp_advertising, phydev->lp_advertising);
 253
 254         cmd->base.speed = phydev->speed;
 255         cmd->base.duplex = phydev->duplex;
 256         cmd->base.master_slave_cfg = phydev->master_slave_get;
 257         cmd->base.master_slave_state = phydev->master_slave_state;
 258         if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
 259                 cmd->base.port = PORT_BNC;
 260         else
 261                 cmd->base.port = phydev->port;
 262         cmd->base.transceiver = phy_is_internal(phydev) ?
 263                                 XCVR_INTERNAL : XCVR_EXTERNAL;
 264         cmd->base.phy_address = phydev->mdio.addr;
 265         cmd->base.autoneg = phydev->autoneg;
 266         cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
 267         cmd->base.eth_tp_mdix = phydev->mdix;
 268         mutex_unlock(&phydev->lock);
 269 }
 270 EXPORT_SYMBOL(phy_ethtool_ksettings_get);
 271
 272 /**
 273  * phy_mii_ioctl - generic PHY MII ioctl interface
 274  * @phydev: the phy_device struct
 275  * @ifr: &struct ifreq for socket ioctl's
 276  * @cmd: ioctl cmd to execute
 277  *
 278  * Note that this function is currently incompatible with the
 279  * PHYCONTROL layer.  It changes registers without regard to
 280  * current state.  Use at own risk.
 281  */
 282 int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
 283 {
 284         struct mii_ioctl_data *mii_data = if_mii(ifr);
 285         u16 val = mii_data->val_in;
 286         bool change_autoneg = false;
 287         int prtad, devad;
 288
 289         switch (cmd) {
 290         case SIOCGMIIPHY:
 291                 mii_data->phy_id = phydev->mdio.addr;
 292                 fallthrough;
 293
 294         case SIOCGMIIREG:
 295                 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
 296                         prtad = mdio_phy_id_prtad(mii_data->phy_id);
 297                         devad = mdio_phy_id_devad(mii_data->phy_id);
 298                         mii_data->val_out = mdiobus_c45_read(
 299                                 phydev->mdio.bus, prtad, devad,
 300                                 mii_data->reg_num);
 301                 } else {
 302                         mii_data->val_out = mdiobus_read(
 303                                 phydev->mdio.bus, mii_data->phy_id,
 304                                 mii_data->reg_num);
 305                 }
 306                 return 0;
 307
 308         case SIOCSMIIREG:
 309                 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
 310                         prtad = mdio_phy_id_prtad(mii_data->phy_id);
 311                         devad = mdio_phy_id_devad(mii_data->phy_id);
 312                 } else {
 313                         prtad = mii_data->phy_id;
 314                         devad = mii_data->reg_num;
 315                 }
 316                 if (prtad == phydev->mdio.addr) {
 317                         switch (devad) {
 318                         case MII_BMCR:
 319                                 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
 320                                         if (phydev->autoneg == AUTONEG_ENABLE)
 321                                                 change_autoneg = true;
 322                                         phydev->autoneg = AUTONEG_DISABLE;
 323                                         if (val & BMCR_FULLDPLX)
 324                                                 phydev->duplex = DUPLEX_FULL;
 325                                         else
 326                                                 phydev->duplex = DUPLEX_HALF;
 327                                         if (val & BMCR_SPEED1000)
 328                                                 phydev->speed = SPEED_1000;
 329                                         else if (val & BMCR_SPEED100)
 330                                                 phydev->speed = SPEED_100;
 331                                         else phydev->speed = SPEED_10;
 332                                 } else {
 333                                         if (phydev->autoneg == AUTONEG_DISABLE)
 334                                                 change_autoneg = true;
 335                                         phydev->autoneg = AUTONEG_ENABLE;
 336                                 }
 337                                 break;
 338                         case MII_ADVERTISE:
 339                                 mii_adv_mod_linkmode_adv_t(phydev->advertising,
 340                                                            val);
 341                                 change_autoneg = true;
 342                                 break;
 343                         case MII_CTRL1000:
 344                                 mii_ctrl1000_mod_linkmode_adv_t(phydev->advertising,
 345                                                                 val);
 346                                 change_autoneg = true;
 347                                 break;
 348                         default:
 349                                 /* do nothing */
 350                                 break;
 351                         }
 352                 }
 353
 354                 if (mdio_phy_id_is_c45(mii_data->phy_id))
 355                         mdiobus_c45_write(phydev->mdio.bus, prtad, devad,
 356                                           mii_data->reg_num, val);
 357                 else
 358                         mdiobus_write(phydev->mdio.bus, prtad, devad, val);
 359
 360                 if (prtad == phydev->mdio.addr &&
 361                     devad == MII_BMCR &&
 362                     val & BMCR_RESET)
 363                         return phy_init_hw(phydev);
 364
 365                 if (change_autoneg)
 366                         return phy_start_aneg(phydev);
 367
 368                 return 0;
 369
 370         case SIOCSHWTSTAMP:
 371                 if (phydev->mii_ts && phydev->mii_ts->hwtstamp)
 372                         return phydev->mii_ts->hwtstamp(phydev->mii_ts, ifr);
 373                 fallthrough;
 374
 375         default:
 376                 return -EOPNOTSUPP;
 377         }
 378 }
 379 EXPORT_SYMBOL(phy_mii_ioctl);
 380
 381 /**
 382  * phy_do_ioctl - generic ndo_eth_ioctl implementation
 383  * @dev: the net_device struct
 384  * @ifr: &struct ifreq for socket ioctl's
 385  * @cmd: ioctl cmd to execute
 386  */
 387 int phy_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 388 {
 389         if (!dev->phydev)
 390                 return -ENODEV;
 391
 392         return phy_mii_ioctl(dev->phydev, ifr, cmd);
 393 }
 394 EXPORT_SYMBOL(phy_do_ioctl);
 395
 396 /**
 397  * phy_do_ioctl_running - generic ndo_eth_ioctl implementation but test first
 398  *
 399  * @dev: the net_device struct
 400  * @ifr: &struct ifreq for socket ioctl's
 401  * @cmd: ioctl cmd to execute
 402  *
 403  * Same as phy_do_ioctl, but ensures that net_device is running before
 404  * handling the ioctl.
 405  */
 406 int phy_do_ioctl_running(struct net_device *dev, struct ifreq *ifr, int cmd)
 407 {
 408         if (!netif_running(dev))
 409                 return -ENODEV;
 410
 411         return phy_do_ioctl(dev, ifr, cmd);
 412 }
 413 EXPORT_SYMBOL(phy_do_ioctl_running);
 414
 415 /**
 416  * phy_queue_state_machine - Trigger the state machine to run soon
 417  *
 418  * @phydev: the phy_device struct
 419  * @jiffies: Run the state machine after these jiffies
 420  */
 421 void phy_queue_state_machine(struct phy_device *phydev, unsigned long jiffies)
 422 {
 423         mod_delayed_work(system_power_efficient_wq, &phydev->state_queue,
 424                          jiffies);
 425 }
 426 EXPORT_SYMBOL(phy_queue_state_machine);
 427
 428 /**
 429  * phy_trigger_machine - Trigger the state machine to run now
 430  *
 431  * @phydev: the phy_device struct
 432  */
 433 void phy_trigger_machine(struct phy_device *phydev)
 434 {
 435         phy_queue_state_machine(phydev, 0);
 436 }
 437 EXPORT_SYMBOL(phy_trigger_machine);
 438
 439 static void phy_abort_cable_test(struct phy_device *phydev)
 440 {
 441         int err;
 442
 443         ethnl_cable_test_finished(phydev);
 444
 445         err = phy_init_hw(phydev);
 446         if (err)
 447                 phydev_err(phydev, "Error while aborting cable test");
 448 }
 449
 450 /**
 451  * phy_ethtool_get_strings - Get the statistic counter names
 452  *
 453  * @phydev: the phy_device struct
 454  * @data: Where to put the strings
 455  */
 456 int phy_ethtool_get_strings(struct phy_device *phydev, u8 *data)
 457 {
 458         if (!phydev->drv)
 459                 return -EIO;
 460
 461         mutex_lock(&phydev->lock);
 462         phydev->drv->get_strings(phydev, data);
 463         mutex_unlock(&phydev->lock);
 464
 465         return 0;
 466 }
 467 EXPORT_SYMBOL(phy_ethtool_get_strings);
 468
 469 /**
 470  * phy_ethtool_get_sset_count - Get the number of statistic counters
 471  *
 472  * @phydev: the phy_device struct
 473  */
 474 int phy_ethtool_get_sset_count(struct phy_device *phydev)
 475 {
 476         int ret;
 477
 478         if (!phydev->drv)
 479                 return -EIO;
 480
 481         if (phydev->drv->get_sset_count &&
 482             phydev->drv->get_strings &&
 483             phydev->drv->get_stats) {
 484                 mutex_lock(&phydev->lock);
 485                 ret = phydev->drv->get_sset_count(phydev);
 486                 mutex_unlock(&phydev->lock);
 487
 488                 return ret;
 489         }
 490
 491         return -EOPNOTSUPP;
 492 }
 493 EXPORT_SYMBOL(phy_ethtool_get_sset_count);
 494
 495 /**
 496  * phy_ethtool_get_stats - Get the statistic counters
 497  *
 498  * @phydev: the phy_device struct
 499  * @stats: What counters to get
 500  * @data: Where to store the counters
 501  */
 502 int phy_ethtool_get_stats(struct phy_device *phydev,
 503                           struct ethtool_stats *stats, u64 *data)
 504 {
 505         if (!phydev->drv)
 506                 return -EIO;
 507
 508         mutex_lock(&phydev->lock);
 509         phydev->drv->get_stats(phydev, stats, data);
 510         mutex_unlock(&phydev->lock);
 511
 512         return 0;
 513 }
 514 EXPORT_SYMBOL(phy_ethtool_get_stats);
 515
 516 /**
 517  * phy_start_cable_test - Start a cable test
 518  *
 519  * @phydev: the phy_device struct
 520  * @extack: extack for reporting useful error messages
 521  */
 522 int phy_start_cable_test(struct phy_device *phydev,
 523                          struct netlink_ext_ack *extack)
 524 {
 525         struct net_device *dev = phydev->attached_dev;
 526         int err = -ENOMEM;
 527
 528         if (!(phydev->drv &&
 529               phydev->drv->cable_test_start &&
 530               phydev->drv->cable_test_get_status)) {
 531                 NL_SET_ERR_MSG(extack,
 532                                "PHY driver does not support cable testing");
 533                 return -EOPNOTSUPP;
 534         }
 535
 536         mutex_lock(&phydev->lock);
 537         if (phydev->state == PHY_CABLETEST) {
 538                 NL_SET_ERR_MSG(extack,
 539                                "PHY already performing a test");
 540                 err = -EBUSY;
 541                 goto out;
 542         }
 543
 544         if (phydev->state < PHY_UP ||
 545             phydev->state > PHY_CABLETEST) {
 546                 NL_SET_ERR_MSG(extack,
 547                                "PHY not configured. Try setting interface up");
 548                 err = -EBUSY;
 549                 goto out;
 550         }
 551
 552         err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF);
 553         if (err)
 554                 goto out;
 555
 556         /* Mark the carrier down until the test is complete */
 557         phy_link_down(phydev);
 558
 559         netif_testing_on(dev);
 560         err = phydev->drv->cable_test_start(phydev);
 561         if (err) {
 562                 netif_testing_off(dev);
 563                 phy_link_up(phydev);
 564                 goto out_free;
 565         }
 566
 567         phydev->state = PHY_CABLETEST;
 568
 569         if (phy_polling_mode(phydev))
 570                 phy_trigger_machine(phydev);
 571
 572         mutex_unlock(&phydev->lock);
 573
 574         return 0;
 575
 576 out_free:
 577         ethnl_cable_test_free(phydev);
 578 out:
 579         mutex_unlock(&phydev->lock);
 580
 581         return err;
 582 }
 583 EXPORT_SYMBOL(phy_start_cable_test);
 584
 585 /**
 586  * phy_start_cable_test_tdr - Start a raw TDR cable test
 587  *
 588  * @phydev: the phy_device struct
 589  * @extack: extack for reporting useful error messages
 590  * @config: Configuration of the test to run
 591  */
 592 int phy_start_cable_test_tdr(struct phy_device *phydev,
 593                              struct netlink_ext_ack *extack,
 594                              const struct phy_tdr_config *config)
 595 {
 596         struct net_device *dev = phydev->attached_dev;
 597         int err = -ENOMEM;
 598
 599         if (!(phydev->drv &&
 600               phydev->drv->cable_test_tdr_start &&
 601               phydev->drv->cable_test_get_status)) {
 602                 NL_SET_ERR_MSG(extack,
 603                                "PHY driver does not support cable test TDR");
 604                 return -EOPNOTSUPP;
 605         }
 606
 607         mutex_lock(&phydev->lock);
 608         if (phydev->state == PHY_CABLETEST) {
 609                 NL_SET_ERR_MSG(extack,
 610                                "PHY already performing a test");
 611                 err = -EBUSY;
 612                 goto out;
 613         }
 614
 615         if (phydev->state < PHY_UP ||
 616             phydev->state > PHY_CABLETEST) {
 617                 NL_SET_ERR_MSG(extack,
 618                                "PHY not configured. Try setting interface up");
 619                 err = -EBUSY;
 620                 goto out;
 621         }
 622
 623         err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
 624         if (err)
 625                 goto out;
 626
 627         /* Mark the carrier down until the test is complete */
 628         phy_link_down(phydev);
 629
 630         netif_testing_on(dev);
 631         err = phydev->drv->cable_test_tdr_start(phydev, config);
 632         if (err) {
 633                 netif_testing_off(dev);
 634                 phy_link_up(phydev);
 635                 goto out_free;
 636         }
 637
 638         phydev->state = PHY_CABLETEST;
 639
 640         if (phy_polling_mode(phydev))
 641                 phy_trigger_machine(phydev);
 642
 643         mutex_unlock(&phydev->lock);
 644
 645         return 0;
 646
 647 out_free:
 648         ethnl_cable_test_free(phydev);
 649 out:
 650         mutex_unlock(&phydev->lock);
 651
 652         return err;
 653 }
 654 EXPORT_SYMBOL(phy_start_cable_test_tdr);
 655
 656 int phy_config_aneg(struct phy_device *phydev)
 657 {
 658         if (phydev->drv->config_aneg)
 659                 return phydev->drv->config_aneg(phydev);
 660
 661         /* Clause 45 PHYs that don't implement Clause 22 registers are not
 662          * allowed to call genphy_config_aneg()
 663          */
 664         if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
 665                 return genphy_c45_config_aneg(phydev);
 666
 667         return genphy_config_aneg(phydev);
 668 }
 669 EXPORT_SYMBOL(phy_config_aneg);
 670
 671 /**
 672  * phy_check_link_status - check link status and set state accordingly
 673  * @phydev: the phy_device struct
 674  *
 675  * Description: Check for link and whether autoneg was triggered / is running
 676  * and set state accordingly
 677  */
 678 static int phy_check_link_status(struct phy_device *phydev)
 679 {
 680         int err;
 681
 682         lockdep_assert_held(&phydev->lock);
 683
 684         /* Keep previous state if loopback is enabled because some PHYs
 685          * report that Link is Down when loopback is enabled.
 686          */
 687         if (phydev->loopback_enabled)
 688                 return 0;
 689
 690         err = phy_read_status(phydev);
 691         if (err)
 692                 return err;
 693
 694         if (phydev->link && phydev->state != PHY_RUNNING) {
 695                 phy_check_downshift(phydev);
 696                 phydev->state = PHY_RUNNING;
 697                 phy_link_up(phydev);
 698         } else if (!phydev->link && phydev->state != PHY_NOLINK) {
 699                 phydev->state = PHY_NOLINK;
 700                 phy_link_down(phydev);
 701         }
 702
 703         return 0;
 704 }
 705
 706 /**
 707  * _phy_start_aneg - start auto-negotiation for this PHY device
 708  * @phydev: the phy_device struct
 709  *
 710  * Description: Sanitizes the settings (if we're not autonegotiating
 711  *   them), and then calls the driver's config_aneg function.
 712  *   If the PHYCONTROL Layer is operating, we change the state to
 713  *   reflect the beginning of Auto-negotiation or forcing.
 714  */
 715 static int _phy_start_aneg(struct phy_device *phydev)
 716 {
 717         int err;
 718
 719         lockdep_assert_held(&phydev->lock);
 720
 721         if (!phydev->drv)
 722                 return -EIO;
 723
 724         if (AUTONEG_DISABLE == phydev->autoneg)
 725                 phy_sanitize_settings(phydev);
 726
 727         err = phy_config_aneg(phydev);
 728         if (err < 0)
 729                 return err;
 730
 731         if (phy_is_started(phydev))
 732                 err = phy_check_link_status(phydev);
 733
 734         return err;
 735 }
 736
 737 /**
 738  * phy_start_aneg - start auto-negotiation for this PHY device
 739  * @phydev: the phy_device struct
 740  *
 741  * Description: Sanitizes the settings (if we're not autonegotiating
 742  *   them), and then calls the driver's config_aneg function.
 743  *   If the PHYCONTROL Layer is operating, we change the state to
 744  *   reflect the beginning of Auto-negotiation or forcing.
 745  */
 746 int phy_start_aneg(struct phy_device *phydev)
 747 {
 748         int err;
 749
 750         mutex_lock(&phydev->lock);
 751         err = _phy_start_aneg(phydev);
 752         mutex_unlock(&phydev->lock);
 753
 754         return err;
 755 }
 756 EXPORT_SYMBOL(phy_start_aneg);
 757
 758 static int phy_poll_aneg_done(struct phy_device *phydev)
 759 {
 760         unsigned int retries = 100;
 761         int ret;
 762
 763         do {
 764                 msleep(100);
 765                 ret = phy_aneg_done(phydev);
 766         } while (!ret && --retries);
 767
 768         if (!ret)
 769                 return -ETIMEDOUT;
 770
 771         return ret < 0 ? ret : 0;
 772 }
 773
 774 int phy_ethtool_ksettings_set(struct phy_device *phydev,
 775                               const struct ethtool_link_ksettings *cmd)
 776 {
 777         __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
 778         u8 autoneg = cmd->base.autoneg;
 779         u8 duplex = cmd->base.duplex;
 780         u32 speed = cmd->base.speed;
 781
 782         if (cmd->base.phy_address != phydev->mdio.addr)
 783                 return -EINVAL;
 784
 785         linkmode_copy(advertising, cmd->link_modes.advertising);
 786
 787         /* We make sure that we don't pass unsupported values in to the PHY */
 788         linkmode_and(advertising, advertising, phydev->supported);
 789
 790         /* Verify the settings we care about. */
 791         if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
 792                 return -EINVAL;
 793
 794         if (autoneg == AUTONEG_ENABLE && linkmode_empty(advertising))
 795                 return -EINVAL;
 796
 797         if (autoneg == AUTONEG_DISABLE &&
 798             ((speed != SPEED_1000 &&
 799               speed != SPEED_100 &&
 800               speed != SPEED_10) ||
 801              (duplex != DUPLEX_HALF &&
 802               duplex != DUPLEX_FULL)))
 803                 return -EINVAL;
 804
 805         mutex_lock(&phydev->lock);
 806         phydev->autoneg = autoneg;
 807
 808         if (autoneg == AUTONEG_DISABLE) {
 809                 phydev->speed = speed;
 810                 phydev->duplex = duplex;
 811         }
 812
 813         linkmode_copy(phydev->advertising, advertising);
 814
 815         linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
 816                          phydev->advertising, autoneg == AUTONEG_ENABLE);
 817
 818         phydev->master_slave_set = cmd->base.master_slave_cfg;
 819         phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
 820
 821         /* Restart the PHY */
 822         if (phy_is_started(phydev)) {
 823                 phydev->state = PHY_UP;
 824                 phy_trigger_machine(phydev);
 825         } else {
 826                 _phy_start_aneg(phydev);
 827         }
 828
 829         mutex_unlock(&phydev->lock);
 830         return 0;
 831 }
 832 EXPORT_SYMBOL(phy_ethtool_ksettings_set);
 833
 834 /**
 835  * phy_speed_down - set speed to lowest speed supported by both link partners
 836  * @phydev: the phy_device struct
 837  * @sync: perform action synchronously
 838  *
 839  * Description: Typically used to save energy when waiting for a WoL packet
 840  *
 841  * WARNING: Setting sync to false may cause the system being unable to suspend
 842  * in case the PHY generates an interrupt when finishing the autonegotiation.
 843  * This interrupt may wake up the system immediately after suspend.
 844  * Therefore use sync = false only if you're sure it's safe with the respective
 845  * network chip.
 846  */
 847 int phy_speed_down(struct phy_device *phydev, bool sync)
 848 {
 849         __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
 850         int ret;
 851
 852         if (phydev->autoneg != AUTONEG_ENABLE)
 853                 return 0;
 854
 855         linkmode_copy(adv_tmp, phydev->advertising);
 856
 857         ret = phy_speed_down_core(phydev);
 858         if (ret)
 859                 return ret;
 860
 861         linkmode_copy(phydev->adv_old, adv_tmp);
 862
 863         if (linkmode_equal(phydev->advertising, adv_tmp))
 864                 return 0;
 865
 866         ret = phy_config_aneg(phydev);
 867         if (ret)
 868                 return ret;
 869
 870         return sync ? phy_poll_aneg_done(phydev) : 0;
 871 }
 872 EXPORT_SYMBOL_GPL(phy_speed_down);
 873
 874 /**
 875  * phy_speed_up - (re)set advertised speeds to all supported speeds
 876  * @phydev: the phy_device struct
 877  *
 878  * Description: Used to revert the effect of phy_speed_down
 879  */
 880 int phy_speed_up(struct phy_device *phydev)
 881 {
 882         __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
 883
 884         if (phydev->autoneg != AUTONEG_ENABLE)
 885                 return 0;
 886
 887         if (linkmode_empty(phydev->adv_old))
 888                 return 0;
 889
 890         linkmode_copy(adv_tmp, phydev->advertising);
 891         linkmode_copy(phydev->advertising, phydev->adv_old);
 892         linkmode_zero(phydev->adv_old);
 893
 894         if (linkmode_equal(phydev->advertising, adv_tmp))
 895                 return 0;
 896
 897         return phy_config_aneg(phydev);
 898 }
 899 EXPORT_SYMBOL_GPL(phy_speed_up);
 900
 901 /**
 902  * phy_start_machine - start PHY state machine tracking
 903  * @phydev: the phy_device struct
 904  *
 905  * Description: The PHY infrastructure can run a state machine
 906  *   which tracks whether the PHY is starting up, negotiating,
 907  *   etc.  This function starts the delayed workqueue which tracks
 908  *   the state of the PHY. If you want to maintain your own state machine,
 909  *   do not call this function.
 910  */
 911 void phy_start_machine(struct phy_device *phydev)
 912 {
 913         phy_trigger_machine(phydev);
 914 }
 915 EXPORT_SYMBOL_GPL(phy_start_machine);
 916
 917 /**
 918  * phy_stop_machine - stop the PHY state machine tracking
 919  * @phydev: target phy_device struct
 920  *
 921  * Description: Stops the state machine delayed workqueue, sets the
 922  *   state to UP (unless it wasn't up yet). This function must be
 923  *   called BEFORE phy_detach.
 924  */
 925 void phy_stop_machine(struct phy_device *phydev)
 926 {
 927         cancel_delayed_work_sync(&phydev->state_queue);
 928
 929         mutex_lock(&phydev->lock);
 930         if (phy_is_started(phydev))
 931                 phydev->state = PHY_UP;
 932         mutex_unlock(&phydev->lock);
 933 }
 934
 935 /**
 936  * phy_error - enter HALTED state for this PHY device
 937  * @phydev: target phy_device struct
 938  *
 939  * Moves the PHY to the HALTED state in response to a read
 940  * or write error, and tells the controller the link is down.
 941  * Must not be called from interrupt context, or while the
 942  * phydev->lock is held.
 943  */
 944 void phy_error(struct phy_device *phydev)
 945 {
 946         WARN_ON(1);
 947
 948         mutex_lock(&phydev->lock);
 949         phydev->state = PHY_HALTED;
 950         mutex_unlock(&phydev->lock);
 951
 952         phy_trigger_machine(phydev);
 953 }
 954 EXPORT_SYMBOL(phy_error);
 955
 956 /**
 957  * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
 958  * @phydev: target phy_device struct
 959  */
 960 int phy_disable_interrupts(struct phy_device *phydev)
 961 {
 962         /* Disable PHY interrupts */
 963         return phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 964 }
 965
 966 /**
 967  * phy_interrupt - PHY interrupt handler
 968  * @irq: interrupt line
 969  * @phy_dat: phy_device pointer
 970  *
 971  * Description: Handle PHY interrupt
 972  */
 973 static irqreturn_t phy_interrupt(int irq, void *phy_dat)
 974 {
 975         struct phy_device *phydev = phy_dat;
 976         struct phy_driver *drv = phydev->drv;
 977         irqreturn_t ret;
 978
 979         mutex_lock(&phydev->lock);
 980         ret = drv->handle_interrupt(phydev);
 981         mutex_unlock(&phydev->lock);
 982
 983         return ret;
 984 }
 985
 986 /**
 987  * phy_enable_interrupts - Enable the interrupts from the PHY side
 988  * @phydev: target phy_device struct
 989  */
 990 static int phy_enable_interrupts(struct phy_device *phydev)
 991 {
 992         return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
 993 }
 994
 995 /**
 996  * phy_request_interrupt - request and enable interrupt for a PHY device
 997  * @phydev: target phy_device struct
 998  *
 999  * Description: Request and enable the interrupt for the given PHY.
1000  *   If this fails, then we set irq to PHY_POLL.
1001  *   This should only be called with a valid IRQ number.
1002  */
1003 void phy_request_interrupt(struct phy_device *phydev)
1004 {
1005         int err;
1006
1007         err = request_threaded_irq(phydev->irq, NULL, phy_interrupt,
1008                                    IRQF_ONESHOT | IRQF_SHARED,
1009                                    phydev_name(phydev), phydev);
1010         if (err) {
1011                 phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n",
1012                             err, phydev->irq);
1013                 phydev->irq = PHY_POLL;
1014         } else {
1015                 if (phy_enable_interrupts(phydev)) {
1016                         phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n");
1017                         phy_free_interrupt(phydev);
1018                         phydev->irq = PHY_POLL;
1019                 }
1020         }
1021 }
1022 EXPORT_SYMBOL(phy_request_interrupt);
1023
1024 /**
1025  * phy_free_interrupt - disable and free interrupt for a PHY device
1026  * @phydev: target phy_device struct
1027  *
1028  * Description: Disable and free the interrupt for the given PHY.
1029  *   This should only be called with a valid IRQ number.
1030  */
1031 void phy_free_interrupt(struct phy_device *phydev)
1032 {
1033         phy_disable_interrupts(phydev);
1034         free_irq(phydev->irq, phydev);
1035 }
1036 EXPORT_SYMBOL(phy_free_interrupt);
1037
1038 /**
1039  * phy_stop - Bring down the PHY link, and stop checking the status
1040  * @phydev: target phy_device struct
1041  */
1042 void phy_stop(struct phy_device *phydev)
1043 {
1044         struct net_device *dev = phydev->attached_dev;
1045
1046         if (!phy_is_started(phydev) && phydev->state != PHY_DOWN) {
1047                 WARN(1, "called from state %s\n",
1048                      phy_state_to_str(phydev->state));
1049                 return;
1050         }
1051
1052         mutex_lock(&phydev->lock);
1053
1054         if (phydev->state == PHY_CABLETEST) {
1055                 phy_abort_cable_test(phydev);
1056                 netif_testing_off(dev);
1057         }
1058
1059         if (phydev->sfp_bus)
1060                 sfp_upstream_stop(phydev->sfp_bus);
1061
1062         phydev->state = PHY_HALTED;
1063
1064         mutex_unlock(&phydev->lock);
1065
1066         phy_state_machine(&phydev->state_queue.work);
1067         phy_stop_machine(phydev);
1068
1069         /* Cannot call flush_scheduled_work() here as desired because
1070          * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler
1071          * will not reenable interrupts.
1072          */
1073 }
1074 EXPORT_SYMBOL(phy_stop);
1075
1076 /**
1077  * phy_start - start or restart a PHY device
1078  * @phydev: target phy_device struct
1079  *
1080  * Description: Indicates the attached device's readiness to
1081  *   handle PHY-related work.  Used during startup to start the
1082  *   PHY, and after a call to phy_stop() to resume operation.
1083  *   Also used to indicate the MDIO bus has cleared an error
1084  *   condition.
1085  */
1086 void phy_start(struct phy_device *phydev)
1087 {
1088         mutex_lock(&phydev->lock);
1089
1090         if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
1091                 WARN(1, "called from state %s\n",
1092                      phy_state_to_str(phydev->state));
1093                 goto out;
1094         }
1095
1096         if (phydev->sfp_bus)
1097                 sfp_upstream_start(phydev->sfp_bus);
1098
1099         /* if phy was suspended, bring the physical link up again */
1100         __phy_resume(phydev);
1101
1102         phydev->state = PHY_UP;
1103
1104         phy_start_machine(phydev);
1105 out:
1106         mutex_unlock(&phydev->lock);
1107 }
1108 EXPORT_SYMBOL(phy_start);
1109
1110 /**
1111  * phy_state_machine - Handle the state machine
1112  * @work: work_struct that describes the work to be done
1113  */
1114 void phy_state_machine(struct work_struct *work)
1115 {
1116         struct delayed_work *dwork = to_delayed_work(work);
1117         struct phy_device *phydev =
1118                         container_of(dwork, struct phy_device, state_queue);
1119         struct net_device *dev = phydev->attached_dev;
1120         bool needs_aneg = false, do_suspend = false;
1121         enum phy_state old_state;
1122         bool finished = false;
1123         int err = 0;
1124
1125         mutex_lock(&phydev->lock);
1126
1127         old_state = phydev->state;
1128
1129         switch (phydev->state) {
1130         case PHY_DOWN:
1131         case PHY_READY:
1132                 break;
1133         case PHY_UP:
1134                 needs_aneg = true;
1135
1136                 break;
1137         case PHY_NOLINK:
1138         case PHY_RUNNING:
1139                 err = phy_check_link_status(phydev);
1140                 break;
1141         case PHY_CABLETEST:
1142                 err = phydev->drv->cable_test_get_status(phydev, &finished);
1143                 if (err) {
1144                         phy_abort_cable_test(phydev);
1145                         netif_testing_off(dev);
1146                         needs_aneg = true;
1147                         phydev->state = PHY_UP;
1148                         break;
1149                 }
1150
1151                 if (finished) {
1152                         ethnl_cable_test_finished(phydev);
1153                         netif_testing_off(dev);
1154                         needs_aneg = true;
1155                         phydev->state = PHY_UP;
1156                 }
1157                 break;
1158         case PHY_HALTED:
1159                 if (phydev->link) {
1160                         phydev->link = 0;
1161                         phy_link_down(phydev);
1162                 }
1163                 do_suspend = true;
1164                 break;
1165         }
1166
1167         mutex_unlock(&phydev->lock);
1168
1169         if (needs_aneg)
1170                 err = phy_start_aneg(phydev);
1171         else if (do_suspend)
1172                 phy_suspend(phydev);
1173
1174         if (err == -ENODEV)
1175                 return;
1176
1177         if (err < 0)
1178                 phy_error(phydev);
1179
1180         if (old_state != phydev->state) {
1181                 phydev_dbg(phydev, "PHY state change %s -> %s\n",
1182                            phy_state_to_str(old_state),
1183                            phy_state_to_str(phydev->state));
1184                 if (phydev->drv && phydev->drv->link_change_notify)
1185                         phydev->drv->link_change_notify(phydev);
1186         }
1187
1188         /* Only re-schedule a PHY state machine change if we are polling the
1189          * PHY, if PHY_MAC_INTERRUPT is set, then we will be moving
1190          * between states from phy_mac_interrupt().
1191          *
1192          * In state PHY_HALTED the PHY gets suspended, so rescheduling the
1193          * state machine would be pointless and possibly error prone when
1194          * called from phy_disconnect() synchronously.
1195          */
1196         mutex_lock(&phydev->lock);
1197         if (phy_polling_mode(phydev) && phy_is_started(phydev))
1198                 phy_queue_state_machine(phydev, PHY_STATE_TIME);
1199         mutex_unlock(&phydev->lock);
1200 }
1201
1202 /**
1203  * phy_mac_interrupt - MAC says the link has changed
1204  * @phydev: phy_device struct with changed link
1205  *
1206  * The MAC layer is able to indicate there has been a change in the PHY link
1207  * status. Trigger the state machine and work a work queue.
1208  */
1209 void phy_mac_interrupt(struct phy_device *phydev)
1210 {
1211         /* Trigger a state machine change */
1212         phy_trigger_machine(phydev);
1213 }
1214 EXPORT_SYMBOL(phy_mac_interrupt);
1215
1216 static void mmd_eee_adv_to_linkmode(unsigned long *advertising, u16 eee_adv)
1217 {
1218         linkmode_zero(advertising);
1219
1220         if (eee_adv & MDIO_EEE_100TX)
1221                 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
1222                                  advertising);
1223         if (eee_adv & MDIO_EEE_1000T)
1224                 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
1225                                  advertising);
1226         if (eee_adv & MDIO_EEE_10GT)
1227                 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
1228                                  advertising);
1229         if (eee_adv & MDIO_EEE_1000KX)
1230                 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
1231                                  advertising);
1232         if (eee_adv & MDIO_EEE_10GKX4)
1233                 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
1234                                  advertising);
1235         if (eee_adv & MDIO_EEE_10GKR)
1236                 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
1237                                  advertising);
1238 }
1239
1240 /**
1241  * phy_init_eee - init and check the EEE feature
1242  * @phydev: target phy_device struct
1243  * @clk_stop_enable: PHY may stop the clock during LPI
1244  *
1245  * Description: it checks if the Energy-Efficient Ethernet (EEE)
1246  * is supported by looking at the MMD registers 3.20 and 7.60/61
1247  * and it programs the MMD register 3.0 setting the "Clock stop enable"
1248  * bit if required.
1249  */
1250 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1251 {
1252         if (!phydev->drv)
1253                 return -EIO;
1254
1255         /* According to 802.3az,the EEE is supported only in full duplex-mode.
1256          */
1257         if (phydev->duplex == DUPLEX_FULL) {
1258                 __ETHTOOL_DECLARE_LINK_MODE_MASK(common);
1259                 __ETHTOOL_DECLARE_LINK_MODE_MASK(lp);
1260                 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv);
1261                 int eee_lp, eee_cap, eee_adv;
1262                 int status;
1263                 u32 cap;
1264
1265                 /* Read phy status to properly get the right settings */
1266                 status = phy_read_status(phydev);
1267                 if (status)
1268                         return status;
1269
1270                 /* First check if the EEE ability is supported */
1271                 eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1272                 if (eee_cap <= 0)
1273                         goto eee_exit_err;
1274
1275                 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1276                 if (!cap)
1277                         goto eee_exit_err;
1278
1279                 /* Check which link settings negotiated and verify it in
1280                  * the EEE advertising registers.
1281                  */
1282                 eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1283                 if (eee_lp <= 0)
1284                         goto eee_exit_err;
1285
1286                 eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1287                 if (eee_adv <= 0)
1288                         goto eee_exit_err;
1289
1290                 mmd_eee_adv_to_linkmode(adv, eee_adv);
1291                 mmd_eee_adv_to_linkmode(lp, eee_lp);
1292                 linkmode_and(common, adv, lp);
1293
1294                 if (!phy_check_valid(phydev->speed, phydev->duplex, common))
1295                         goto eee_exit_err;
1296
1297                 if (clk_stop_enable)
1298                         /* Configure the PHY to stop receiving xMII
1299                          * clock while it is signaling LPI.
1300                          */
1301                         phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
1302                                          MDIO_PCS_CTRL1_CLKSTOP_EN);
1303
1304                 return 0; /* EEE supported */
1305         }
1306 eee_exit_err:
1307         return -EPROTONOSUPPORT;
1308 }
1309 EXPORT_SYMBOL(phy_init_eee);
1310
1311 /**
1312  * phy_get_eee_err - report the EEE wake error count
1313  * @phydev: target phy_device struct
1314  *
1315  * Description: it is to report the number of time where the PHY
1316  * failed to complete its normal wake sequence.
1317  */
1318 int phy_get_eee_err(struct phy_device *phydev)
1319 {
1320         if (!phydev->drv)
1321                 return -EIO;
1322
1323         return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
1324 }
1325 EXPORT_SYMBOL(phy_get_eee_err);
1326
1327 /**
1328  * phy_ethtool_get_eee - get EEE supported and status
1329  * @phydev: target phy_device struct
1330  * @data: ethtool_eee data
1331  *
1332  * Description: it reportes the Supported/Advertisement/LP Advertisement
1333  * capabilities.
1334  */
1335 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1336 {
1337         int val;
1338
1339         if (!phydev->drv)
1340                 return -EIO;
1341
1342         /* Get Supported EEE */
1343         val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1344         if (val < 0)
1345                 return val;
1346         data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1347
1348         /* Get advertisement EEE */
1349         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1350         if (val < 0)
1351                 return val;
1352         data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1353         data->eee_enabled = !!data->advertised;
1354
1355         /* Get LP advertisement EEE */
1356         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1357         if (val < 0)
1358                 return val;
1359         data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1360
1361         data->eee_active = !!(data->advertised & data->lp_advertised);
1362
1363         return 0;
1364 }
1365 EXPORT_SYMBOL(phy_ethtool_get_eee);
1366
1367 /**
1368  * phy_ethtool_set_eee - set EEE supported and status
1369  * @phydev: target phy_device struct
1370  * @data: ethtool_eee data
1371  *
1372  * Description: it is to program the Advertisement EEE register.
1373  */
1374 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1375 {
1376         int cap, old_adv, adv = 0, ret;
1377
1378         if (!phydev->drv)
1379                 return -EIO;
1380
1381         /* Get Supported EEE */
1382         cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1383         if (cap < 0)
1384                 return cap;
1385
1386         old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1387         if (old_adv < 0)
1388                 return old_adv;
1389
1390         if (data->eee_enabled) {
1391                 adv = !data->advertised ? cap :
1392                       ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
1393                 /* Mask prohibited EEE modes */
1394                 adv &= ~phydev->eee_broken_modes;
1395         }
1396
1397         if (old_adv != adv) {
1398                 ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1399                 if (ret < 0)
1400                         return ret;
1401
1402                 /* Restart autonegotiation so the new modes get sent to the
1403                  * link partner.
1404                  */
1405                 if (phydev->autoneg == AUTONEG_ENABLE) {
1406                         ret = phy_restart_aneg(phydev);
1407                         if (ret < 0)
1408                                 return ret;
1409                 }
1410         }
1411
1412         return 0;
1413 }
1414 EXPORT_SYMBOL(phy_ethtool_set_eee);
1415
1416 /**
1417  * phy_ethtool_set_wol - Configure Wake On LAN
1418  *
1419  * @phydev: target phy_device struct
1420  * @wol: Configuration requested
1421  */
1422 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1423 {
1424         if (phydev->drv && phydev->drv->set_wol)
1425                 return phydev->drv->set_wol(phydev, wol);
1426
1427         return -EOPNOTSUPP;
1428 }
1429 EXPORT_SYMBOL(phy_ethtool_set_wol);
1430
1431 /**
1432  * phy_ethtool_get_wol - Get the current Wake On LAN configuration
1433  *
1434  * @phydev: target phy_device struct
1435  * @wol: Store the current configuration here
1436  */
1437 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1438 {
1439         if (phydev->drv && phydev->drv->get_wol)
1440                 phydev->drv->get_wol(phydev, wol);
1441 }
1442 EXPORT_SYMBOL(phy_ethtool_get_wol);
1443
1444 int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1445                                    struct ethtool_link_ksettings *cmd)
1446 {
1447         struct phy_device *phydev = ndev->phydev;
1448
1449         if (!phydev)
1450                 return -ENODEV;
1451
1452         phy_ethtool_ksettings_get(phydev, cmd);
1453
1454         return 0;
1455 }
1456 EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1457
1458 int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1459                                    const struct ethtool_link_ksettings *cmd)
1460 {
1461         struct phy_device *phydev = ndev->phydev;
1462
1463         if (!phydev)
1464                 return -ENODEV;
1465
1466         return phy_ethtool_ksettings_set(phydev, cmd);
1467 }
1468 EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1469
1470 /**
1471  * phy_ethtool_nway_reset - Restart auto negotiation
1472  * @ndev: Network device to restart autoneg for
1473  */
1474 int phy_ethtool_nway_reset(struct net_device *ndev)
1475 {
1476         struct phy_device *phydev = ndev->phydev;
1477
1478         if (!phydev)
1479                 return -ENODEV;
1480
1481         if (!phydev->drv)
1482                 return -EIO;
1483
1484         return phy_restart_aneg(phydev);
1485 }
1486 EXPORT_SYMBOL(phy_ethtool_nway_reset);