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