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 devad = mdiobus_c45_addr(devad, mii_data->reg_num); 299 } else { 300 prtad = mii_data->phy_id; 301 devad = mii_data->reg_num; 302 } 303 mii_data->val_out = mdiobus_read(phydev->mdio.bus, prtad, 304 devad); 305 return 0; 306 307 case SIOCSMIIREG: 308 if (mdio_phy_id_is_c45(mii_data->phy_id)) { 309 prtad = mdio_phy_id_prtad(mii_data->phy_id); 310 devad = mdio_phy_id_devad(mii_data->phy_id); 311 devad = mdiobus_c45_addr(devad, mii_data->reg_num); 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 mdiobus_write(phydev->mdio.bus, prtad, devad, val); 355 356 if (prtad == phydev->mdio.addr && 357 devad == MII_BMCR && 358 val & BMCR_RESET) 359 return phy_init_hw(phydev); 360 361 if (change_autoneg) 362 return phy_start_aneg(phydev); 363 364 return 0; 365 366 case SIOCSHWTSTAMP: 367 if (phydev->mii_ts && phydev->mii_ts->hwtstamp) 368 return phydev->mii_ts->hwtstamp(phydev->mii_ts, ifr); 369 fallthrough; 370 371 default: 372 return -EOPNOTSUPP; 373 } 374 } 375 EXPORT_SYMBOL(phy_mii_ioctl); 376 377 /** 378 * phy_do_ioctl - generic ndo_eth_ioctl implementation 379 * @dev: the net_device struct 380 * @ifr: &struct ifreq for socket ioctl's 381 * @cmd: ioctl cmd to execute 382 */ 383 int phy_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 384 { 385 if (!dev->phydev) 386 return -ENODEV; 387 388 return phy_mii_ioctl(dev->phydev, ifr, cmd); 389 } 390 EXPORT_SYMBOL(phy_do_ioctl); 391 392 /** 393 * phy_do_ioctl_running - generic ndo_eth_ioctl implementation but test first 394 * 395 * @dev: the net_device struct 396 * @ifr: &struct ifreq for socket ioctl's 397 * @cmd: ioctl cmd to execute 398 * 399 * Same as phy_do_ioctl, but ensures that net_device is running before 400 * handling the ioctl. 401 */ 402 int phy_do_ioctl_running(struct net_device *dev, struct ifreq *ifr, int cmd) 403 { 404 if (!netif_running(dev)) 405 return -ENODEV; 406 407 return phy_do_ioctl(dev, ifr, cmd); 408 } 409 EXPORT_SYMBOL(phy_do_ioctl_running); 410 411 /** 412 * phy_queue_state_machine - Trigger the state machine to run soon 413 * 414 * @phydev: the phy_device struct 415 * @jiffies: Run the state machine after these jiffies 416 */ 417 void phy_queue_state_machine(struct phy_device *phydev, unsigned long jiffies) 418 { 419 mod_delayed_work(system_power_efficient_wq, &phydev->state_queue, 420 jiffies); 421 } 422 EXPORT_SYMBOL(phy_queue_state_machine); 423 424 /** 425 * phy_trigger_machine - Trigger the state machine to run now 426 * 427 * @phydev: the phy_device struct 428 */ 429 void phy_trigger_machine(struct phy_device *phydev) 430 { 431 phy_queue_state_machine(phydev, 0); 432 } 433 EXPORT_SYMBOL(phy_trigger_machine); 434 435 static void phy_abort_cable_test(struct phy_device *phydev) 436 { 437 int err; 438 439 ethnl_cable_test_finished(phydev); 440 441 err = phy_init_hw(phydev); 442 if (err) 443 phydev_err(phydev, "Error while aborting cable test"); 444 } 445 446 /** 447 * phy_ethtool_get_strings - Get the statistic counter names 448 * 449 * @phydev: the phy_device struct 450 * @data: Where to put the strings 451 */ 452 int phy_ethtool_get_strings(struct phy_device *phydev, u8 *data) 453 { 454 if (!phydev->drv) 455 return -EIO; 456 457 mutex_lock(&phydev->lock); 458 phydev->drv->get_strings(phydev, data); 459 mutex_unlock(&phydev->lock); 460 461 return 0; 462 } 463 EXPORT_SYMBOL(phy_ethtool_get_strings); 464 465 /** 466 * phy_ethtool_get_sset_count - Get the number of statistic counters 467 * 468 * @phydev: the phy_device struct 469 */ 470 int phy_ethtool_get_sset_count(struct phy_device *phydev) 471 { 472 int ret; 473 474 if (!phydev->drv) 475 return -EIO; 476 477 if (phydev->drv->get_sset_count && 478 phydev->drv->get_strings && 479 phydev->drv->get_stats) { 480 mutex_lock(&phydev->lock); 481 ret = phydev->drv->get_sset_count(phydev); 482 mutex_unlock(&phydev->lock); 483 484 return ret; 485 } 486 487 return -EOPNOTSUPP; 488 } 489 EXPORT_SYMBOL(phy_ethtool_get_sset_count); 490 491 /** 492 * phy_ethtool_get_stats - Get the statistic counters 493 * 494 * @phydev: the phy_device struct 495 * @stats: What counters to get 496 * @data: Where to store the counters 497 */ 498 int phy_ethtool_get_stats(struct phy_device *phydev, 499 struct ethtool_stats *stats, u64 *data) 500 { 501 if (!phydev->drv) 502 return -EIO; 503 504 mutex_lock(&phydev->lock); 505 phydev->drv->get_stats(phydev, stats, data); 506 mutex_unlock(&phydev->lock); 507 508 return 0; 509 } 510 EXPORT_SYMBOL(phy_ethtool_get_stats); 511 512 /** 513 * phy_start_cable_test - Start a cable test 514 * 515 * @phydev: the phy_device struct 516 * @extack: extack for reporting useful error messages 517 */ 518 int phy_start_cable_test(struct phy_device *phydev, 519 struct netlink_ext_ack *extack) 520 { 521 struct net_device *dev = phydev->attached_dev; 522 int err = -ENOMEM; 523 524 if (!(phydev->drv && 525 phydev->drv->cable_test_start && 526 phydev->drv->cable_test_get_status)) { 527 NL_SET_ERR_MSG(extack, 528 "PHY driver does not support cable testing"); 529 return -EOPNOTSUPP; 530 } 531 532 mutex_lock(&phydev->lock); 533 if (phydev->state == PHY_CABLETEST) { 534 NL_SET_ERR_MSG(extack, 535 "PHY already performing a test"); 536 err = -EBUSY; 537 goto out; 538 } 539 540 if (phydev->state < PHY_UP || 541 phydev->state > PHY_CABLETEST) { 542 NL_SET_ERR_MSG(extack, 543 "PHY not configured. Try setting interface up"); 544 err = -EBUSY; 545 goto out; 546 } 547 548 err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF); 549 if (err) 550 goto out; 551 552 /* Mark the carrier down until the test is complete */ 553 phy_link_down(phydev); 554 555 netif_testing_on(dev); 556 err = phydev->drv->cable_test_start(phydev); 557 if (err) { 558 netif_testing_off(dev); 559 phy_link_up(phydev); 560 goto out_free; 561 } 562 563 phydev->state = PHY_CABLETEST; 564 565 if (phy_polling_mode(phydev)) 566 phy_trigger_machine(phydev); 567 568 mutex_unlock(&phydev->lock); 569 570 return 0; 571 572 out_free: 573 ethnl_cable_test_free(phydev); 574 out: 575 mutex_unlock(&phydev->lock); 576 577 return err; 578 } 579 EXPORT_SYMBOL(phy_start_cable_test); 580 581 /** 582 * phy_start_cable_test_tdr - Start a raw TDR cable test 583 * 584 * @phydev: the phy_device struct 585 * @extack: extack for reporting useful error messages 586 * @config: Configuration of the test to run 587 */ 588 int phy_start_cable_test_tdr(struct phy_device *phydev, 589 struct netlink_ext_ack *extack, 590 const struct phy_tdr_config *config) 591 { 592 struct net_device *dev = phydev->attached_dev; 593 int err = -ENOMEM; 594 595 if (!(phydev->drv && 596 phydev->drv->cable_test_tdr_start && 597 phydev->drv->cable_test_get_status)) { 598 NL_SET_ERR_MSG(extack, 599 "PHY driver does not support cable test TDR"); 600 return -EOPNOTSUPP; 601 } 602 603 mutex_lock(&phydev->lock); 604 if (phydev->state == PHY_CABLETEST) { 605 NL_SET_ERR_MSG(extack, 606 "PHY already performing a test"); 607 err = -EBUSY; 608 goto out; 609 } 610 611 if (phydev->state < PHY_UP || 612 phydev->state > PHY_CABLETEST) { 613 NL_SET_ERR_MSG(extack, 614 "PHY not configured. Try setting interface up"); 615 err = -EBUSY; 616 goto out; 617 } 618 619 err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF); 620 if (err) 621 goto out; 622 623 /* Mark the carrier down until the test is complete */ 624 phy_link_down(phydev); 625 626 netif_testing_on(dev); 627 err = phydev->drv->cable_test_tdr_start(phydev, config); 628 if (err) { 629 netif_testing_off(dev); 630 phy_link_up(phydev); 631 goto out_free; 632 } 633 634 phydev->state = PHY_CABLETEST; 635 636 if (phy_polling_mode(phydev)) 637 phy_trigger_machine(phydev); 638 639 mutex_unlock(&phydev->lock); 640 641 return 0; 642 643 out_free: 644 ethnl_cable_test_free(phydev); 645 out: 646 mutex_unlock(&phydev->lock); 647 648 return err; 649 } 650 EXPORT_SYMBOL(phy_start_cable_test_tdr); 651 652 int phy_config_aneg(struct phy_device *phydev) 653 { 654 if (phydev->drv->config_aneg) 655 return phydev->drv->config_aneg(phydev); 656 657 /* Clause 45 PHYs that don't implement Clause 22 registers are not 658 * allowed to call genphy_config_aneg() 659 */ 660 if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0))) 661 return genphy_c45_config_aneg(phydev); 662 663 return genphy_config_aneg(phydev); 664 } 665 EXPORT_SYMBOL(phy_config_aneg); 666 667 /** 668 * phy_check_link_status - check link status and set state accordingly 669 * @phydev: the phy_device struct 670 * 671 * Description: Check for link and whether autoneg was triggered / is running 672 * and set state accordingly 673 */ 674 static int phy_check_link_status(struct phy_device *phydev) 675 { 676 int err; 677 678 lockdep_assert_held(&phydev->lock); 679 680 /* Keep previous state if loopback is enabled because some PHYs 681 * report that Link is Down when loopback is enabled. 682 */ 683 if (phydev->loopback_enabled) 684 return 0; 685 686 err = phy_read_status(phydev); 687 if (err) 688 return err; 689 690 if (phydev->link && phydev->state != PHY_RUNNING) { 691 phy_check_downshift(phydev); 692 phydev->state = PHY_RUNNING; 693 phy_link_up(phydev); 694 } else if (!phydev->link && phydev->state != PHY_NOLINK) { 695 phydev->state = PHY_NOLINK; 696 phy_link_down(phydev); 697 } 698 699 return 0; 700 } 701 702 /** 703 * _phy_start_aneg - start auto-negotiation for this PHY device 704 * @phydev: the phy_device struct 705 * 706 * Description: Sanitizes the settings (if we're not autonegotiating 707 * them), and then calls the driver's config_aneg function. 708 * If the PHYCONTROL Layer is operating, we change the state to 709 * reflect the beginning of Auto-negotiation or forcing. 710 */ 711 static int _phy_start_aneg(struct phy_device *phydev) 712 { 713 int err; 714 715 lockdep_assert_held(&phydev->lock); 716 717 if (!phydev->drv) 718 return -EIO; 719 720 if (AUTONEG_DISABLE == phydev->autoneg) 721 phy_sanitize_settings(phydev); 722 723 err = phy_config_aneg(phydev); 724 if (err < 0) 725 return err; 726 727 if (phy_is_started(phydev)) 728 err = phy_check_link_status(phydev); 729 730 return err; 731 } 732 733 /** 734 * phy_start_aneg - start auto-negotiation for this PHY device 735 * @phydev: the phy_device struct 736 * 737 * Description: Sanitizes the settings (if we're not autonegotiating 738 * them), and then calls the driver's config_aneg function. 739 * If the PHYCONTROL Layer is operating, we change the state to 740 * reflect the beginning of Auto-negotiation or forcing. 741 */ 742 int phy_start_aneg(struct phy_device *phydev) 743 { 744 int err; 745 746 mutex_lock(&phydev->lock); 747 err = _phy_start_aneg(phydev); 748 mutex_unlock(&phydev->lock); 749 750 return err; 751 } 752 EXPORT_SYMBOL(phy_start_aneg); 753 754 static int phy_poll_aneg_done(struct phy_device *phydev) 755 { 756 unsigned int retries = 100; 757 int ret; 758 759 do { 760 msleep(100); 761 ret = phy_aneg_done(phydev); 762 } while (!ret && --retries); 763 764 if (!ret) 765 return -ETIMEDOUT; 766 767 return ret < 0 ? ret : 0; 768 } 769 770 int phy_ethtool_ksettings_set(struct phy_device *phydev, 771 const struct ethtool_link_ksettings *cmd) 772 { 773 __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising); 774 u8 autoneg = cmd->base.autoneg; 775 u8 duplex = cmd->base.duplex; 776 u32 speed = cmd->base.speed; 777 778 if (cmd->base.phy_address != phydev->mdio.addr) 779 return -EINVAL; 780 781 linkmode_copy(advertising, cmd->link_modes.advertising); 782 783 /* We make sure that we don't pass unsupported values in to the PHY */ 784 linkmode_and(advertising, advertising, phydev->supported); 785 786 /* Verify the settings we care about. */ 787 if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE) 788 return -EINVAL; 789 790 if (autoneg == AUTONEG_ENABLE && linkmode_empty(advertising)) 791 return -EINVAL; 792 793 if (autoneg == AUTONEG_DISABLE && 794 ((speed != SPEED_1000 && 795 speed != SPEED_100 && 796 speed != SPEED_10) || 797 (duplex != DUPLEX_HALF && 798 duplex != DUPLEX_FULL))) 799 return -EINVAL; 800 801 mutex_lock(&phydev->lock); 802 phydev->autoneg = autoneg; 803 804 if (autoneg == AUTONEG_DISABLE) { 805 phydev->speed = speed; 806 phydev->duplex = duplex; 807 } 808 809 linkmode_copy(phydev->advertising, advertising); 810 811 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 812 phydev->advertising, autoneg == AUTONEG_ENABLE); 813 814 phydev->master_slave_set = cmd->base.master_slave_cfg; 815 phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl; 816 817 /* Restart the PHY */ 818 if (phy_is_started(phydev)) { 819 phydev->state = PHY_UP; 820 phy_trigger_machine(phydev); 821 } else { 822 _phy_start_aneg(phydev); 823 } 824 825 mutex_unlock(&phydev->lock); 826 return 0; 827 } 828 EXPORT_SYMBOL(phy_ethtool_ksettings_set); 829 830 /** 831 * phy_speed_down - set speed to lowest speed supported by both link partners 832 * @phydev: the phy_device struct 833 * @sync: perform action synchronously 834 * 835 * Description: Typically used to save energy when waiting for a WoL packet 836 * 837 * WARNING: Setting sync to false may cause the system being unable to suspend 838 * in case the PHY generates an interrupt when finishing the autonegotiation. 839 * This interrupt may wake up the system immediately after suspend. 840 * Therefore use sync = false only if you're sure it's safe with the respective 841 * network chip. 842 */ 843 int phy_speed_down(struct phy_device *phydev, bool sync) 844 { 845 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp); 846 int ret; 847 848 if (phydev->autoneg != AUTONEG_ENABLE) 849 return 0; 850 851 linkmode_copy(adv_tmp, phydev->advertising); 852 853 ret = phy_speed_down_core(phydev); 854 if (ret) 855 return ret; 856 857 linkmode_copy(phydev->adv_old, adv_tmp); 858 859 if (linkmode_equal(phydev->advertising, adv_tmp)) 860 return 0; 861 862 ret = phy_config_aneg(phydev); 863 if (ret) 864 return ret; 865 866 return sync ? phy_poll_aneg_done(phydev) : 0; 867 } 868 EXPORT_SYMBOL_GPL(phy_speed_down); 869 870 /** 871 * phy_speed_up - (re)set advertised speeds to all supported speeds 872 * @phydev: the phy_device struct 873 * 874 * Description: Used to revert the effect of phy_speed_down 875 */ 876 int phy_speed_up(struct phy_device *phydev) 877 { 878 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp); 879 880 if (phydev->autoneg != AUTONEG_ENABLE) 881 return 0; 882 883 if (linkmode_empty(phydev->adv_old)) 884 return 0; 885 886 linkmode_copy(adv_tmp, phydev->advertising); 887 linkmode_copy(phydev->advertising, phydev->adv_old); 888 linkmode_zero(phydev->adv_old); 889 890 if (linkmode_equal(phydev->advertising, adv_tmp)) 891 return 0; 892 893 return phy_config_aneg(phydev); 894 } 895 EXPORT_SYMBOL_GPL(phy_speed_up); 896 897 /** 898 * phy_start_machine - start PHY state machine tracking 899 * @phydev: the phy_device struct 900 * 901 * Description: The PHY infrastructure can run a state machine 902 * which tracks whether the PHY is starting up, negotiating, 903 * etc. This function starts the delayed workqueue which tracks 904 * the state of the PHY. If you want to maintain your own state machine, 905 * do not call this function. 906 */ 907 void phy_start_machine(struct phy_device *phydev) 908 { 909 phy_trigger_machine(phydev); 910 } 911 EXPORT_SYMBOL_GPL(phy_start_machine); 912 913 /** 914 * phy_stop_machine - stop the PHY state machine tracking 915 * @phydev: target phy_device struct 916 * 917 * Description: Stops the state machine delayed workqueue, sets the 918 * state to UP (unless it wasn't up yet). This function must be 919 * called BEFORE phy_detach. 920 */ 921 void phy_stop_machine(struct phy_device *phydev) 922 { 923 cancel_delayed_work_sync(&phydev->state_queue); 924 925 mutex_lock(&phydev->lock); 926 if (phy_is_started(phydev)) 927 phydev->state = PHY_UP; 928 mutex_unlock(&phydev->lock); 929 } 930 931 /** 932 * phy_error - enter HALTED state for this PHY device 933 * @phydev: target phy_device struct 934 * 935 * Moves the PHY to the HALTED state in response to a read 936 * or write error, and tells the controller the link is down. 937 * Must not be called from interrupt context, or while the 938 * phydev->lock is held. 939 */ 940 void phy_error(struct phy_device *phydev) 941 { 942 WARN_ON(1); 943 944 mutex_lock(&phydev->lock); 945 phydev->state = PHY_HALTED; 946 mutex_unlock(&phydev->lock); 947 948 phy_trigger_machine(phydev); 949 } 950 EXPORT_SYMBOL(phy_error); 951 952 /** 953 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side 954 * @phydev: target phy_device struct 955 */ 956 int phy_disable_interrupts(struct phy_device *phydev) 957 { 958 /* Disable PHY interrupts */ 959 return phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); 960 } 961 962 /** 963 * phy_interrupt - PHY interrupt handler 964 * @irq: interrupt line 965 * @phy_dat: phy_device pointer 966 * 967 * Description: Handle PHY interrupt 968 */ 969 static irqreturn_t phy_interrupt(int irq, void *phy_dat) 970 { 971 struct phy_device *phydev = phy_dat; 972 struct phy_driver *drv = phydev->drv; 973 irqreturn_t ret; 974 975 mutex_lock(&phydev->lock); 976 ret = drv->handle_interrupt(phydev); 977 mutex_unlock(&phydev->lock); 978 979 return ret; 980 } 981 982 /** 983 * phy_enable_interrupts - Enable the interrupts from the PHY side 984 * @phydev: target phy_device struct 985 */ 986 static int phy_enable_interrupts(struct phy_device *phydev) 987 { 988 return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); 989 } 990 991 /** 992 * phy_request_interrupt - request and enable interrupt for a PHY device 993 * @phydev: target phy_device struct 994 * 995 * Description: Request and enable the interrupt for the given PHY. 996 * If this fails, then we set irq to PHY_POLL. 997 * This should only be called with a valid IRQ number. 998 */ 999 void phy_request_interrupt(struct phy_device *phydev) 1000 { 1001 int err; 1002 1003 err = request_threaded_irq(phydev->irq, NULL, phy_interrupt, 1004 IRQF_ONESHOT | IRQF_SHARED, 1005 phydev_name(phydev), phydev); 1006 if (err) { 1007 phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n", 1008 err, phydev->irq); 1009 phydev->irq = PHY_POLL; 1010 } else { 1011 if (phy_enable_interrupts(phydev)) { 1012 phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n"); 1013 phy_free_interrupt(phydev); 1014 phydev->irq = PHY_POLL; 1015 } 1016 } 1017 } 1018 EXPORT_SYMBOL(phy_request_interrupt); 1019 1020 /** 1021 * phy_free_interrupt - disable and free interrupt for a PHY device 1022 * @phydev: target phy_device struct 1023 * 1024 * Description: Disable and free the interrupt for the given PHY. 1025 * This should only be called with a valid IRQ number. 1026 */ 1027 void phy_free_interrupt(struct phy_device *phydev) 1028 { 1029 phy_disable_interrupts(phydev); 1030 free_irq(phydev->irq, phydev); 1031 } 1032 EXPORT_SYMBOL(phy_free_interrupt); 1033 1034 /** 1035 * phy_stop - Bring down the PHY link, and stop checking the status 1036 * @phydev: target phy_device struct 1037 */ 1038 void phy_stop(struct phy_device *phydev) 1039 { 1040 struct net_device *dev = phydev->attached_dev; 1041 1042 if (!phy_is_started(phydev) && phydev->state != PHY_DOWN) { 1043 WARN(1, "called from state %s\n", 1044 phy_state_to_str(phydev->state)); 1045 return; 1046 } 1047 1048 mutex_lock(&phydev->lock); 1049 1050 if (phydev->state == PHY_CABLETEST) { 1051 phy_abort_cable_test(phydev); 1052 netif_testing_off(dev); 1053 } 1054 1055 if (phydev->sfp_bus) 1056 sfp_upstream_stop(phydev->sfp_bus); 1057 1058 phydev->state = PHY_HALTED; 1059 1060 mutex_unlock(&phydev->lock); 1061 1062 phy_state_machine(&phydev->state_queue.work); 1063 phy_stop_machine(phydev); 1064 1065 /* Cannot call flush_scheduled_work() here as desired because 1066 * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler 1067 * will not reenable interrupts. 1068 */ 1069 } 1070 EXPORT_SYMBOL(phy_stop); 1071 1072 /** 1073 * phy_start - start or restart a PHY device 1074 * @phydev: target phy_device struct 1075 * 1076 * Description: Indicates the attached device's readiness to 1077 * handle PHY-related work. Used during startup to start the 1078 * PHY, and after a call to phy_stop() to resume operation. 1079 * Also used to indicate the MDIO bus has cleared an error 1080 * condition. 1081 */ 1082 void phy_start(struct phy_device *phydev) 1083 { 1084 mutex_lock(&phydev->lock); 1085 1086 if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) { 1087 WARN(1, "called from state %s\n", 1088 phy_state_to_str(phydev->state)); 1089 goto out; 1090 } 1091 1092 if (phydev->sfp_bus) 1093 sfp_upstream_start(phydev->sfp_bus); 1094 1095 /* if phy was suspended, bring the physical link up again */ 1096 __phy_resume(phydev); 1097 1098 phydev->state = PHY_UP; 1099 1100 phy_start_machine(phydev); 1101 out: 1102 mutex_unlock(&phydev->lock); 1103 } 1104 EXPORT_SYMBOL(phy_start); 1105 1106 /** 1107 * phy_state_machine - Handle the state machine 1108 * @work: work_struct that describes the work to be done 1109 */ 1110 void phy_state_machine(struct work_struct *work) 1111 { 1112 struct delayed_work *dwork = to_delayed_work(work); 1113 struct phy_device *phydev = 1114 container_of(dwork, struct phy_device, state_queue); 1115 struct net_device *dev = phydev->attached_dev; 1116 bool needs_aneg = false, do_suspend = false; 1117 enum phy_state old_state; 1118 bool finished = false; 1119 int err = 0; 1120 1121 mutex_lock(&phydev->lock); 1122 1123 old_state = phydev->state; 1124 1125 switch (phydev->state) { 1126 case PHY_DOWN: 1127 case PHY_READY: 1128 break; 1129 case PHY_UP: 1130 needs_aneg = true; 1131 1132 break; 1133 case PHY_NOLINK: 1134 case PHY_RUNNING: 1135 err = phy_check_link_status(phydev); 1136 break; 1137 case PHY_CABLETEST: 1138 err = phydev->drv->cable_test_get_status(phydev, &finished); 1139 if (err) { 1140 phy_abort_cable_test(phydev); 1141 netif_testing_off(dev); 1142 needs_aneg = true; 1143 phydev->state = PHY_UP; 1144 break; 1145 } 1146 1147 if (finished) { 1148 ethnl_cable_test_finished(phydev); 1149 netif_testing_off(dev); 1150 needs_aneg = true; 1151 phydev->state = PHY_UP; 1152 } 1153 break; 1154 case PHY_HALTED: 1155 if (phydev->link) { 1156 phydev->link = 0; 1157 phy_link_down(phydev); 1158 } 1159 do_suspend = true; 1160 break; 1161 } 1162 1163 mutex_unlock(&phydev->lock); 1164 1165 if (needs_aneg) 1166 err = phy_start_aneg(phydev); 1167 else if (do_suspend) 1168 phy_suspend(phydev); 1169 1170 if (err == -ENODEV) 1171 return; 1172 1173 if (err < 0) 1174 phy_error(phydev); 1175 1176 if (old_state != phydev->state) { 1177 phydev_dbg(phydev, "PHY state change %s -> %s\n", 1178 phy_state_to_str(old_state), 1179 phy_state_to_str(phydev->state)); 1180 if (phydev->drv && phydev->drv->link_change_notify) 1181 phydev->drv->link_change_notify(phydev); 1182 } 1183 1184 /* Only re-schedule a PHY state machine change if we are polling the 1185 * PHY, if PHY_MAC_INTERRUPT is set, then we will be moving 1186 * between states from phy_mac_interrupt(). 1187 * 1188 * In state PHY_HALTED the PHY gets suspended, so rescheduling the 1189 * state machine would be pointless and possibly error prone when 1190 * called from phy_disconnect() synchronously. 1191 */ 1192 mutex_lock(&phydev->lock); 1193 if (phy_polling_mode(phydev) && phy_is_started(phydev)) 1194 phy_queue_state_machine(phydev, PHY_STATE_TIME); 1195 mutex_unlock(&phydev->lock); 1196 } 1197 1198 /** 1199 * phy_mac_interrupt - MAC says the link has changed 1200 * @phydev: phy_device struct with changed link 1201 * 1202 * The MAC layer is able to indicate there has been a change in the PHY link 1203 * status. Trigger the state machine and work a work queue. 1204 */ 1205 void phy_mac_interrupt(struct phy_device *phydev) 1206 { 1207 /* Trigger a state machine change */ 1208 phy_trigger_machine(phydev); 1209 } 1210 EXPORT_SYMBOL(phy_mac_interrupt); 1211 1212 static void mmd_eee_adv_to_linkmode(unsigned long *advertising, u16 eee_adv) 1213 { 1214 linkmode_zero(advertising); 1215 1216 if (eee_adv & MDIO_EEE_100TX) 1217 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, 1218 advertising); 1219 if (eee_adv & MDIO_EEE_1000T) 1220 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 1221 advertising); 1222 if (eee_adv & MDIO_EEE_10GT) 1223 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, 1224 advertising); 1225 if (eee_adv & MDIO_EEE_1000KX) 1226 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, 1227 advertising); 1228 if (eee_adv & MDIO_EEE_10GKX4) 1229 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, 1230 advertising); 1231 if (eee_adv & MDIO_EEE_10GKR) 1232 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, 1233 advertising); 1234 } 1235 1236 /** 1237 * phy_init_eee - init and check the EEE feature 1238 * @phydev: target phy_device struct 1239 * @clk_stop_enable: PHY may stop the clock during LPI 1240 * 1241 * Description: it checks if the Energy-Efficient Ethernet (EEE) 1242 * is supported by looking at the MMD registers 3.20 and 7.60/61 1243 * and it programs the MMD register 3.0 setting the "Clock stop enable" 1244 * bit if required. 1245 */ 1246 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable) 1247 { 1248 if (!phydev->drv) 1249 return -EIO; 1250 1251 /* According to 802.3az,the EEE is supported only in full duplex-mode. 1252 */ 1253 if (phydev->duplex == DUPLEX_FULL) { 1254 __ETHTOOL_DECLARE_LINK_MODE_MASK(common); 1255 __ETHTOOL_DECLARE_LINK_MODE_MASK(lp); 1256 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv); 1257 int eee_lp, eee_cap, eee_adv; 1258 int status; 1259 u32 cap; 1260 1261 /* Read phy status to properly get the right settings */ 1262 status = phy_read_status(phydev); 1263 if (status) 1264 return status; 1265 1266 /* First check if the EEE ability is supported */ 1267 eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); 1268 if (eee_cap <= 0) 1269 goto eee_exit_err; 1270 1271 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap); 1272 if (!cap) 1273 goto eee_exit_err; 1274 1275 /* Check which link settings negotiated and verify it in 1276 * the EEE advertising registers. 1277 */ 1278 eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE); 1279 if (eee_lp <= 0) 1280 goto eee_exit_err; 1281 1282 eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); 1283 if (eee_adv <= 0) 1284 goto eee_exit_err; 1285 1286 mmd_eee_adv_to_linkmode(adv, eee_adv); 1287 mmd_eee_adv_to_linkmode(lp, eee_lp); 1288 linkmode_and(common, adv, lp); 1289 1290 if (!phy_check_valid(phydev->speed, phydev->duplex, common)) 1291 goto eee_exit_err; 1292 1293 if (clk_stop_enable) 1294 /* Configure the PHY to stop receiving xMII 1295 * clock while it is signaling LPI. 1296 */ 1297 phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, 1298 MDIO_PCS_CTRL1_CLKSTOP_EN); 1299 1300 return 0; /* EEE supported */ 1301 } 1302 eee_exit_err: 1303 return -EPROTONOSUPPORT; 1304 } 1305 EXPORT_SYMBOL(phy_init_eee); 1306 1307 /** 1308 * phy_get_eee_err - report the EEE wake error count 1309 * @phydev: target phy_device struct 1310 * 1311 * Description: it is to report the number of time where the PHY 1312 * failed to complete its normal wake sequence. 1313 */ 1314 int phy_get_eee_err(struct phy_device *phydev) 1315 { 1316 if (!phydev->drv) 1317 return -EIO; 1318 1319 return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR); 1320 } 1321 EXPORT_SYMBOL(phy_get_eee_err); 1322 1323 /** 1324 * phy_ethtool_get_eee - get EEE supported and status 1325 * @phydev: target phy_device struct 1326 * @data: ethtool_eee data 1327 * 1328 * Description: it reportes the Supported/Advertisement/LP Advertisement 1329 * capabilities. 1330 */ 1331 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data) 1332 { 1333 int val; 1334 1335 if (!phydev->drv) 1336 return -EIO; 1337 1338 /* Get Supported EEE */ 1339 val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); 1340 if (val < 0) 1341 return val; 1342 data->supported = mmd_eee_cap_to_ethtool_sup_t(val); 1343 1344 /* Get advertisement EEE */ 1345 val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); 1346 if (val < 0) 1347 return val; 1348 data->advertised = mmd_eee_adv_to_ethtool_adv_t(val); 1349 data->eee_enabled = !!data->advertised; 1350 1351 /* Get LP advertisement EEE */ 1352 val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE); 1353 if (val < 0) 1354 return val; 1355 data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val); 1356 1357 data->eee_active = !!(data->advertised & data->lp_advertised); 1358 1359 return 0; 1360 } 1361 EXPORT_SYMBOL(phy_ethtool_get_eee); 1362 1363 /** 1364 * phy_ethtool_set_eee - set EEE supported and status 1365 * @phydev: target phy_device struct 1366 * @data: ethtool_eee data 1367 * 1368 * Description: it is to program the Advertisement EEE register. 1369 */ 1370 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data) 1371 { 1372 int cap, old_adv, adv = 0, ret; 1373 1374 if (!phydev->drv) 1375 return -EIO; 1376 1377 /* Get Supported EEE */ 1378 cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); 1379 if (cap < 0) 1380 return cap; 1381 1382 old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); 1383 if (old_adv < 0) 1384 return old_adv; 1385 1386 if (data->eee_enabled) { 1387 adv = !data->advertised ? cap : 1388 ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap; 1389 /* Mask prohibited EEE modes */ 1390 adv &= ~phydev->eee_broken_modes; 1391 } 1392 1393 if (old_adv != adv) { 1394 ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv); 1395 if (ret < 0) 1396 return ret; 1397 1398 /* Restart autonegotiation so the new modes get sent to the 1399 * link partner. 1400 */ 1401 if (phydev->autoneg == AUTONEG_ENABLE) { 1402 ret = phy_restart_aneg(phydev); 1403 if (ret < 0) 1404 return ret; 1405 } 1406 } 1407 1408 return 0; 1409 } 1410 EXPORT_SYMBOL(phy_ethtool_set_eee); 1411 1412 /** 1413 * phy_ethtool_set_wol - Configure Wake On LAN 1414 * 1415 * @phydev: target phy_device struct 1416 * @wol: Configuration requested 1417 */ 1418 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) 1419 { 1420 if (phydev->drv && phydev->drv->set_wol) 1421 return phydev->drv->set_wol(phydev, wol); 1422 1423 return -EOPNOTSUPP; 1424 } 1425 EXPORT_SYMBOL(phy_ethtool_set_wol); 1426 1427 /** 1428 * phy_ethtool_get_wol - Get the current Wake On LAN configuration 1429 * 1430 * @phydev: target phy_device struct 1431 * @wol: Store the current configuration here 1432 */ 1433 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) 1434 { 1435 if (phydev->drv && phydev->drv->get_wol) 1436 phydev->drv->get_wol(phydev, wol); 1437 } 1438 EXPORT_SYMBOL(phy_ethtool_get_wol); 1439 1440 int phy_ethtool_get_link_ksettings(struct net_device *ndev, 1441 struct ethtool_link_ksettings *cmd) 1442 { 1443 struct phy_device *phydev = ndev->phydev; 1444 1445 if (!phydev) 1446 return -ENODEV; 1447 1448 phy_ethtool_ksettings_get(phydev, cmd); 1449 1450 return 0; 1451 } 1452 EXPORT_SYMBOL(phy_ethtool_get_link_ksettings); 1453 1454 int phy_ethtool_set_link_ksettings(struct net_device *ndev, 1455 const struct ethtool_link_ksettings *cmd) 1456 { 1457 struct phy_device *phydev = ndev->phydev; 1458 1459 if (!phydev) 1460 return -ENODEV; 1461 1462 return phy_ethtool_ksettings_set(phydev, cmd); 1463 } 1464 EXPORT_SYMBOL(phy_ethtool_set_link_ksettings); 1465 1466 /** 1467 * phy_ethtool_nway_reset - Restart auto negotiation 1468 * @ndev: Network device to restart autoneg for 1469 */ 1470 int phy_ethtool_nway_reset(struct net_device *ndev) 1471 { 1472 struct phy_device *phydev = ndev->phydev; 1473 1474 if (!phydev) 1475 return -ENODEV; 1476 1477 if (!phydev->drv) 1478 return -EIO; 1479 1480 return phy_restart_aneg(phydev); 1481 } 1482 EXPORT_SYMBOL(phy_ethtool_nway_reset); 1483