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 <linux/suspend.h> 35 #include <net/netlink.h> 36 #include <net/genetlink.h> 37 #include <net/sock.h> 38 39 #define PHY_STATE_TIME HZ 40 41 #define PHY_STATE_STR(_state) \ 42 case PHY_##_state: \ 43 return __stringify(_state); \ 44 45 static const char *phy_state_to_str(enum phy_state st) 46 { 47 switch (st) { 48 PHY_STATE_STR(DOWN) 49 PHY_STATE_STR(READY) 50 PHY_STATE_STR(UP) 51 PHY_STATE_STR(RUNNING) 52 PHY_STATE_STR(NOLINK) 53 PHY_STATE_STR(CABLETEST) 54 PHY_STATE_STR(HALTED) 55 PHY_STATE_STR(ERROR) 56 } 57 58 return NULL; 59 } 60 61 static void phy_process_state_change(struct phy_device *phydev, 62 enum phy_state old_state) 63 { 64 if (old_state != phydev->state) { 65 phydev_dbg(phydev, "PHY state change %s -> %s\n", 66 phy_state_to_str(old_state), 67 phy_state_to_str(phydev->state)); 68 if (phydev->drv && phydev->drv->link_change_notify) 69 phydev->drv->link_change_notify(phydev); 70 } 71 } 72 73 static void phy_link_up(struct phy_device *phydev) 74 { 75 phydev->phy_link_change(phydev, true); 76 phy_led_trigger_change_speed(phydev); 77 } 78 79 static void phy_link_down(struct phy_device *phydev) 80 { 81 phydev->phy_link_change(phydev, false); 82 phy_led_trigger_change_speed(phydev); 83 WRITE_ONCE(phydev->link_down_events, phydev->link_down_events + 1); 84 } 85 86 static const char *phy_pause_str(struct phy_device *phydev) 87 { 88 bool local_pause, local_asym_pause; 89 90 if (phydev->autoneg == AUTONEG_DISABLE) 91 goto no_pause; 92 93 local_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 94 phydev->advertising); 95 local_asym_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 96 phydev->advertising); 97 98 if (local_pause && phydev->pause) 99 return "rx/tx"; 100 101 if (local_asym_pause && phydev->asym_pause) { 102 if (local_pause) 103 return "rx"; 104 if (phydev->pause) 105 return "tx"; 106 } 107 108 no_pause: 109 return "off"; 110 } 111 112 /** 113 * phy_print_status - Convenience function to print out the current phy status 114 * @phydev: the phy_device struct 115 */ 116 void phy_print_status(struct phy_device *phydev) 117 { 118 if (phydev->link) { 119 netdev_info(phydev->attached_dev, 120 "Link is Up - %s/%s %s- flow control %s\n", 121 phy_speed_to_str(phydev->speed), 122 phy_duplex_to_str(phydev->duplex), 123 phydev->downshifted_rate ? "(downshifted) " : "", 124 phy_pause_str(phydev)); 125 } else { 126 netdev_info(phydev->attached_dev, "Link is Down\n"); 127 } 128 } 129 EXPORT_SYMBOL(phy_print_status); 130 131 /** 132 * phy_get_rate_matching - determine if rate matching is supported 133 * @phydev: The phy device to return rate matching for 134 * @iface: The interface mode to use 135 * 136 * This determines the type of rate matching (if any) that @phy supports 137 * using @iface. @iface may be %PHY_INTERFACE_MODE_NA to determine if any 138 * interface supports rate matching. 139 * 140 * Return: The type of rate matching @phy supports for @iface, or 141 * %RATE_MATCH_NONE. 142 */ 143 int phy_get_rate_matching(struct phy_device *phydev, 144 phy_interface_t iface) 145 { 146 int ret = RATE_MATCH_NONE; 147 148 if (phydev->drv->get_rate_matching) { 149 mutex_lock(&phydev->lock); 150 ret = phydev->drv->get_rate_matching(phydev, iface); 151 mutex_unlock(&phydev->lock); 152 } 153 154 return ret; 155 } 156 EXPORT_SYMBOL_GPL(phy_get_rate_matching); 157 158 /** 159 * phy_config_interrupt - configure the PHY device for the requested interrupts 160 * @phydev: the phy_device struct 161 * @interrupts: interrupt flags to configure for this @phydev 162 * 163 * Returns 0 on success or < 0 on error. 164 */ 165 static int phy_config_interrupt(struct phy_device *phydev, bool interrupts) 166 { 167 phydev->interrupts = interrupts ? 1 : 0; 168 if (phydev->drv->config_intr) 169 return phydev->drv->config_intr(phydev); 170 171 return 0; 172 } 173 174 /** 175 * phy_restart_aneg - restart auto-negotiation 176 * @phydev: target phy_device struct 177 * 178 * Restart the autonegotiation on @phydev. Returns >= 0 on success or 179 * negative errno on error. 180 */ 181 int phy_restart_aneg(struct phy_device *phydev) 182 { 183 int ret; 184 185 if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0))) 186 ret = genphy_c45_restart_aneg(phydev); 187 else 188 ret = genphy_restart_aneg(phydev); 189 190 return ret; 191 } 192 EXPORT_SYMBOL_GPL(phy_restart_aneg); 193 194 /** 195 * phy_aneg_done - return auto-negotiation status 196 * @phydev: target phy_device struct 197 * 198 * Description: Return the auto-negotiation status from this @phydev 199 * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation 200 * is still pending. 201 */ 202 int phy_aneg_done(struct phy_device *phydev) 203 { 204 if (phydev->drv && phydev->drv->aneg_done) 205 return phydev->drv->aneg_done(phydev); 206 else if (phydev->is_c45) 207 return genphy_c45_aneg_done(phydev); 208 else 209 return genphy_aneg_done(phydev); 210 } 211 EXPORT_SYMBOL(phy_aneg_done); 212 213 /** 214 * phy_find_valid - find a PHY setting that matches the requested parameters 215 * @speed: desired speed 216 * @duplex: desired duplex 217 * @supported: mask of supported link modes 218 * 219 * Locate a supported phy setting that is, in priority order: 220 * - an exact match for the specified speed and duplex mode 221 * - a match for the specified speed, or slower speed 222 * - the slowest supported speed 223 * Returns the matched phy_setting entry, or %NULL if no supported phy 224 * settings were found. 225 */ 226 static const struct phy_setting * 227 phy_find_valid(int speed, int duplex, unsigned long *supported) 228 { 229 return phy_lookup_setting(speed, duplex, supported, false); 230 } 231 232 /** 233 * phy_supported_speeds - return all speeds currently supported by a phy device 234 * @phy: The phy device to return supported speeds of. 235 * @speeds: buffer to store supported speeds in. 236 * @size: size of speeds buffer. 237 * 238 * Description: Returns the number of supported speeds, and fills the speeds 239 * buffer with the supported speeds. If speeds buffer is too small to contain 240 * all currently supported speeds, will return as many speeds as can fit. 241 */ 242 unsigned int phy_supported_speeds(struct phy_device *phy, 243 unsigned int *speeds, 244 unsigned int size) 245 { 246 return phy_speeds(speeds, size, phy->supported); 247 } 248 249 /** 250 * phy_check_valid - check if there is a valid PHY setting which matches 251 * speed, duplex, and feature mask 252 * @speed: speed to match 253 * @duplex: duplex to match 254 * @features: A mask of the valid settings 255 * 256 * Description: Returns true if there is a valid setting, false otherwise. 257 */ 258 bool phy_check_valid(int speed, int duplex, unsigned long *features) 259 { 260 return !!phy_lookup_setting(speed, duplex, features, true); 261 } 262 EXPORT_SYMBOL(phy_check_valid); 263 264 /** 265 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex 266 * @phydev: the target phy_device struct 267 * 268 * Description: Make sure the PHY is set to supported speeds and 269 * duplexes. Drop down by one in this order: 1000/FULL, 270 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF. 271 */ 272 static void phy_sanitize_settings(struct phy_device *phydev) 273 { 274 const struct phy_setting *setting; 275 276 setting = phy_find_valid(phydev->speed, phydev->duplex, 277 phydev->supported); 278 if (setting) { 279 phydev->speed = setting->speed; 280 phydev->duplex = setting->duplex; 281 } else { 282 /* We failed to find anything (no supported speeds?) */ 283 phydev->speed = SPEED_UNKNOWN; 284 phydev->duplex = DUPLEX_UNKNOWN; 285 } 286 } 287 288 void phy_ethtool_ksettings_get(struct phy_device *phydev, 289 struct ethtool_link_ksettings *cmd) 290 { 291 mutex_lock(&phydev->lock); 292 linkmode_copy(cmd->link_modes.supported, phydev->supported); 293 linkmode_copy(cmd->link_modes.advertising, phydev->advertising); 294 linkmode_copy(cmd->link_modes.lp_advertising, phydev->lp_advertising); 295 296 cmd->base.speed = phydev->speed; 297 cmd->base.duplex = phydev->duplex; 298 cmd->base.master_slave_cfg = phydev->master_slave_get; 299 cmd->base.master_slave_state = phydev->master_slave_state; 300 cmd->base.rate_matching = phydev->rate_matching; 301 if (phydev->interface == PHY_INTERFACE_MODE_MOCA) 302 cmd->base.port = PORT_BNC; 303 else 304 cmd->base.port = phydev->port; 305 cmd->base.transceiver = phy_is_internal(phydev) ? 306 XCVR_INTERNAL : XCVR_EXTERNAL; 307 cmd->base.phy_address = phydev->mdio.addr; 308 cmd->base.autoneg = phydev->autoneg; 309 cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl; 310 cmd->base.eth_tp_mdix = phydev->mdix; 311 mutex_unlock(&phydev->lock); 312 } 313 EXPORT_SYMBOL(phy_ethtool_ksettings_get); 314 315 /** 316 * phy_mii_ioctl - generic PHY MII ioctl interface 317 * @phydev: the phy_device struct 318 * @ifr: &struct ifreq for socket ioctl's 319 * @cmd: ioctl cmd to execute 320 * 321 * Note that this function is currently incompatible with the 322 * PHYCONTROL layer. It changes registers without regard to 323 * current state. Use at own risk. 324 */ 325 int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd) 326 { 327 struct mii_ioctl_data *mii_data = if_mii(ifr); 328 struct kernel_hwtstamp_config kernel_cfg; 329 struct netlink_ext_ack extack = {}; 330 u16 val = mii_data->val_in; 331 bool change_autoneg = false; 332 struct hwtstamp_config cfg; 333 int prtad, devad; 334 int ret; 335 336 switch (cmd) { 337 case SIOCGMIIPHY: 338 mii_data->phy_id = phydev->mdio.addr; 339 fallthrough; 340 341 case SIOCGMIIREG: 342 if (mdio_phy_id_is_c45(mii_data->phy_id)) { 343 prtad = mdio_phy_id_prtad(mii_data->phy_id); 344 devad = mdio_phy_id_devad(mii_data->phy_id); 345 ret = mdiobus_c45_read(phydev->mdio.bus, prtad, devad, 346 mii_data->reg_num); 347 348 } else { 349 ret = mdiobus_read(phydev->mdio.bus, mii_data->phy_id, 350 mii_data->reg_num); 351 } 352 353 if (ret < 0) 354 return ret; 355 356 mii_data->val_out = ret; 357 358 return 0; 359 360 case SIOCSMIIREG: 361 if (mdio_phy_id_is_c45(mii_data->phy_id)) { 362 prtad = mdio_phy_id_prtad(mii_data->phy_id); 363 devad = mdio_phy_id_devad(mii_data->phy_id); 364 } else { 365 prtad = mii_data->phy_id; 366 devad = mii_data->reg_num; 367 } 368 if (prtad == phydev->mdio.addr) { 369 switch (devad) { 370 case MII_BMCR: 371 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) { 372 if (phydev->autoneg == AUTONEG_ENABLE) 373 change_autoneg = true; 374 phydev->autoneg = AUTONEG_DISABLE; 375 if (val & BMCR_FULLDPLX) 376 phydev->duplex = DUPLEX_FULL; 377 else 378 phydev->duplex = DUPLEX_HALF; 379 if (val & BMCR_SPEED1000) 380 phydev->speed = SPEED_1000; 381 else if (val & BMCR_SPEED100) 382 phydev->speed = SPEED_100; 383 else phydev->speed = SPEED_10; 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 if (mdio_phy_id_is_c45(mii_data->phy_id)) 407 mdiobus_c45_write(phydev->mdio.bus, prtad, devad, 408 mii_data->reg_num, val); 409 else 410 mdiobus_write(phydev->mdio.bus, prtad, devad, val); 411 412 if (prtad == phydev->mdio.addr && 413 devad == MII_BMCR && 414 val & BMCR_RESET) 415 return phy_init_hw(phydev); 416 417 if (change_autoneg) 418 return phy_start_aneg(phydev); 419 420 return 0; 421 422 case SIOCSHWTSTAMP: 423 if (phydev->mii_ts && phydev->mii_ts->hwtstamp) { 424 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) 425 return -EFAULT; 426 427 hwtstamp_config_to_kernel(&kernel_cfg, &cfg); 428 ret = phydev->mii_ts->hwtstamp(phydev->mii_ts, &kernel_cfg, &extack); 429 if (ret) 430 return ret; 431 432 hwtstamp_config_from_kernel(&cfg, &kernel_cfg); 433 if (copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg))) 434 return -EFAULT; 435 436 return 0; 437 } 438 fallthrough; 439 440 default: 441 return -EOPNOTSUPP; 442 } 443 } 444 EXPORT_SYMBOL(phy_mii_ioctl); 445 446 /** 447 * phy_do_ioctl - generic ndo_eth_ioctl implementation 448 * @dev: the net_device struct 449 * @ifr: &struct ifreq for socket ioctl's 450 * @cmd: ioctl cmd to execute 451 */ 452 int phy_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 453 { 454 if (!dev->phydev) 455 return -ENODEV; 456 457 return phy_mii_ioctl(dev->phydev, ifr, cmd); 458 } 459 EXPORT_SYMBOL(phy_do_ioctl); 460 461 /** 462 * phy_do_ioctl_running - generic ndo_eth_ioctl implementation but test first 463 * 464 * @dev: the net_device struct 465 * @ifr: &struct ifreq for socket ioctl's 466 * @cmd: ioctl cmd to execute 467 * 468 * Same as phy_do_ioctl, but ensures that net_device is running before 469 * handling the ioctl. 470 */ 471 int phy_do_ioctl_running(struct net_device *dev, struct ifreq *ifr, int cmd) 472 { 473 if (!netif_running(dev)) 474 return -ENODEV; 475 476 return phy_do_ioctl(dev, ifr, cmd); 477 } 478 EXPORT_SYMBOL(phy_do_ioctl_running); 479 480 /** 481 * __phy_hwtstamp_get - Get hardware timestamping configuration from PHY 482 * 483 * @phydev: the PHY device structure 484 * @config: structure holding the timestamping configuration 485 * 486 * Query the PHY device for its current hardware timestamping configuration. 487 */ 488 int __phy_hwtstamp_get(struct phy_device *phydev, 489 struct kernel_hwtstamp_config *config) 490 { 491 if (!phydev) 492 return -ENODEV; 493 494 return -EOPNOTSUPP; 495 } 496 497 /** 498 * __phy_hwtstamp_set - Modify PHY hardware timestamping configuration 499 * 500 * @phydev: the PHY device structure 501 * @config: structure holding the timestamping configuration 502 * @extack: netlink extended ack structure, for error reporting 503 */ 504 int __phy_hwtstamp_set(struct phy_device *phydev, 505 struct kernel_hwtstamp_config *config, 506 struct netlink_ext_ack *extack) 507 { 508 if (!phydev) 509 return -ENODEV; 510 511 if (phydev->mii_ts && phydev->mii_ts->hwtstamp) 512 return phydev->mii_ts->hwtstamp(phydev->mii_ts, config, extack); 513 514 return -EOPNOTSUPP; 515 } 516 517 /** 518 * phy_queue_state_machine - Trigger the state machine to run soon 519 * 520 * @phydev: the phy_device struct 521 * @jiffies: Run the state machine after these jiffies 522 */ 523 void phy_queue_state_machine(struct phy_device *phydev, unsigned long jiffies) 524 { 525 mod_delayed_work(system_power_efficient_wq, &phydev->state_queue, 526 jiffies); 527 } 528 EXPORT_SYMBOL(phy_queue_state_machine); 529 530 /** 531 * phy_trigger_machine - Trigger the state machine to run now 532 * 533 * @phydev: the phy_device struct 534 */ 535 void phy_trigger_machine(struct phy_device *phydev) 536 { 537 phy_queue_state_machine(phydev, 0); 538 } 539 EXPORT_SYMBOL(phy_trigger_machine); 540 541 static void phy_abort_cable_test(struct phy_device *phydev) 542 { 543 int err; 544 545 ethnl_cable_test_finished(phydev); 546 547 err = phy_init_hw(phydev); 548 if (err) 549 phydev_err(phydev, "Error while aborting cable test"); 550 } 551 552 /** 553 * phy_ethtool_get_strings - Get the statistic counter names 554 * 555 * @phydev: the phy_device struct 556 * @data: Where to put the strings 557 */ 558 int phy_ethtool_get_strings(struct phy_device *phydev, u8 *data) 559 { 560 if (!phydev->drv) 561 return -EIO; 562 563 mutex_lock(&phydev->lock); 564 phydev->drv->get_strings(phydev, data); 565 mutex_unlock(&phydev->lock); 566 567 return 0; 568 } 569 EXPORT_SYMBOL(phy_ethtool_get_strings); 570 571 /** 572 * phy_ethtool_get_sset_count - Get the number of statistic counters 573 * 574 * @phydev: the phy_device struct 575 */ 576 int phy_ethtool_get_sset_count(struct phy_device *phydev) 577 { 578 int ret; 579 580 if (!phydev->drv) 581 return -EIO; 582 583 if (phydev->drv->get_sset_count && 584 phydev->drv->get_strings && 585 phydev->drv->get_stats) { 586 mutex_lock(&phydev->lock); 587 ret = phydev->drv->get_sset_count(phydev); 588 mutex_unlock(&phydev->lock); 589 590 return ret; 591 } 592 593 return -EOPNOTSUPP; 594 } 595 EXPORT_SYMBOL(phy_ethtool_get_sset_count); 596 597 /** 598 * phy_ethtool_get_stats - Get the statistic counters 599 * 600 * @phydev: the phy_device struct 601 * @stats: What counters to get 602 * @data: Where to store the counters 603 */ 604 int phy_ethtool_get_stats(struct phy_device *phydev, 605 struct ethtool_stats *stats, u64 *data) 606 { 607 if (!phydev->drv) 608 return -EIO; 609 610 mutex_lock(&phydev->lock); 611 phydev->drv->get_stats(phydev, stats, data); 612 mutex_unlock(&phydev->lock); 613 614 return 0; 615 } 616 EXPORT_SYMBOL(phy_ethtool_get_stats); 617 618 /** 619 * phy_ethtool_get_plca_cfg - Get PLCA RS configuration 620 * @phydev: the phy_device struct 621 * @plca_cfg: where to store the retrieved configuration 622 * 623 * Retrieve the PLCA configuration from the PHY. Return 0 on success or a 624 * negative value if an error occurred. 625 */ 626 int phy_ethtool_get_plca_cfg(struct phy_device *phydev, 627 struct phy_plca_cfg *plca_cfg) 628 { 629 int ret; 630 631 if (!phydev->drv) { 632 ret = -EIO; 633 goto out; 634 } 635 636 if (!phydev->drv->get_plca_cfg) { 637 ret = -EOPNOTSUPP; 638 goto out; 639 } 640 641 mutex_lock(&phydev->lock); 642 ret = phydev->drv->get_plca_cfg(phydev, plca_cfg); 643 644 mutex_unlock(&phydev->lock); 645 out: 646 return ret; 647 } 648 649 /** 650 * plca_check_valid - Check PLCA configuration before enabling 651 * @phydev: the phy_device struct 652 * @plca_cfg: current PLCA configuration 653 * @extack: extack for reporting useful error messages 654 * 655 * Checks whether the PLCA and PHY configuration are consistent and it is safe 656 * to enable PLCA. Returns 0 on success or a negative value if the PLCA or PHY 657 * configuration is not consistent. 658 */ 659 static int plca_check_valid(struct phy_device *phydev, 660 const struct phy_plca_cfg *plca_cfg, 661 struct netlink_ext_ack *extack) 662 { 663 int ret = 0; 664 665 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT1S_P2MP_Half_BIT, 666 phydev->advertising)) { 667 ret = -EOPNOTSUPP; 668 NL_SET_ERR_MSG(extack, 669 "Point to Multi-Point mode is not enabled"); 670 } else if (plca_cfg->node_id >= 255) { 671 NL_SET_ERR_MSG(extack, "PLCA node ID is not set"); 672 ret = -EINVAL; 673 } 674 675 return ret; 676 } 677 678 /** 679 * phy_ethtool_set_plca_cfg - Set PLCA RS configuration 680 * @phydev: the phy_device struct 681 * @plca_cfg: new PLCA configuration to apply 682 * @extack: extack for reporting useful error messages 683 * 684 * Sets the PLCA configuration in the PHY. Return 0 on success or a 685 * negative value if an error occurred. 686 */ 687 int phy_ethtool_set_plca_cfg(struct phy_device *phydev, 688 const struct phy_plca_cfg *plca_cfg, 689 struct netlink_ext_ack *extack) 690 { 691 struct phy_plca_cfg *curr_plca_cfg; 692 int ret; 693 694 if (!phydev->drv) { 695 ret = -EIO; 696 goto out; 697 } 698 699 if (!phydev->drv->set_plca_cfg || 700 !phydev->drv->get_plca_cfg) { 701 ret = -EOPNOTSUPP; 702 goto out; 703 } 704 705 curr_plca_cfg = kmalloc(sizeof(*curr_plca_cfg), GFP_KERNEL); 706 if (!curr_plca_cfg) { 707 ret = -ENOMEM; 708 goto out; 709 } 710 711 mutex_lock(&phydev->lock); 712 713 ret = phydev->drv->get_plca_cfg(phydev, curr_plca_cfg); 714 if (ret) 715 goto out_drv; 716 717 if (curr_plca_cfg->enabled < 0 && plca_cfg->enabled >= 0) { 718 NL_SET_ERR_MSG(extack, 719 "PHY does not support changing the PLCA 'enable' attribute"); 720 ret = -EINVAL; 721 goto out_drv; 722 } 723 724 if (curr_plca_cfg->node_id < 0 && plca_cfg->node_id >= 0) { 725 NL_SET_ERR_MSG(extack, 726 "PHY does not support changing the PLCA 'local node ID' attribute"); 727 ret = -EINVAL; 728 goto out_drv; 729 } 730 731 if (curr_plca_cfg->node_cnt < 0 && plca_cfg->node_cnt >= 0) { 732 NL_SET_ERR_MSG(extack, 733 "PHY does not support changing the PLCA 'node count' attribute"); 734 ret = -EINVAL; 735 goto out_drv; 736 } 737 738 if (curr_plca_cfg->to_tmr < 0 && plca_cfg->to_tmr >= 0) { 739 NL_SET_ERR_MSG(extack, 740 "PHY does not support changing the PLCA 'TO timer' attribute"); 741 ret = -EINVAL; 742 goto out_drv; 743 } 744 745 if (curr_plca_cfg->burst_cnt < 0 && plca_cfg->burst_cnt >= 0) { 746 NL_SET_ERR_MSG(extack, 747 "PHY does not support changing the PLCA 'burst count' attribute"); 748 ret = -EINVAL; 749 goto out_drv; 750 } 751 752 if (curr_plca_cfg->burst_tmr < 0 && plca_cfg->burst_tmr >= 0) { 753 NL_SET_ERR_MSG(extack, 754 "PHY does not support changing the PLCA 'burst timer' attribute"); 755 ret = -EINVAL; 756 goto out_drv; 757 } 758 759 // if enabling PLCA, perform a few sanity checks 760 if (plca_cfg->enabled > 0) { 761 // allow setting node_id concurrently with enabled 762 if (plca_cfg->node_id >= 0) 763 curr_plca_cfg->node_id = plca_cfg->node_id; 764 765 ret = plca_check_valid(phydev, curr_plca_cfg, extack); 766 if (ret) 767 goto out_drv; 768 } 769 770 ret = phydev->drv->set_plca_cfg(phydev, plca_cfg); 771 772 out_drv: 773 kfree(curr_plca_cfg); 774 mutex_unlock(&phydev->lock); 775 out: 776 return ret; 777 } 778 779 /** 780 * phy_ethtool_get_plca_status - Get PLCA RS status information 781 * @phydev: the phy_device struct 782 * @plca_st: where to store the retrieved status information 783 * 784 * Retrieve the PLCA status information from the PHY. Return 0 on success or a 785 * negative value if an error occurred. 786 */ 787 int phy_ethtool_get_plca_status(struct phy_device *phydev, 788 struct phy_plca_status *plca_st) 789 { 790 int ret; 791 792 if (!phydev->drv) { 793 ret = -EIO; 794 goto out; 795 } 796 797 if (!phydev->drv->get_plca_status) { 798 ret = -EOPNOTSUPP; 799 goto out; 800 } 801 802 mutex_lock(&phydev->lock); 803 ret = phydev->drv->get_plca_status(phydev, plca_st); 804 805 mutex_unlock(&phydev->lock); 806 out: 807 return ret; 808 } 809 810 /** 811 * phy_start_cable_test - Start a cable test 812 * 813 * @phydev: the phy_device struct 814 * @extack: extack for reporting useful error messages 815 */ 816 int phy_start_cable_test(struct phy_device *phydev, 817 struct netlink_ext_ack *extack) 818 { 819 struct net_device *dev = phydev->attached_dev; 820 int err = -ENOMEM; 821 822 if (!(phydev->drv && 823 phydev->drv->cable_test_start && 824 phydev->drv->cable_test_get_status)) { 825 NL_SET_ERR_MSG(extack, 826 "PHY driver does not support cable testing"); 827 return -EOPNOTSUPP; 828 } 829 830 mutex_lock(&phydev->lock); 831 if (phydev->state == PHY_CABLETEST) { 832 NL_SET_ERR_MSG(extack, 833 "PHY already performing a test"); 834 err = -EBUSY; 835 goto out; 836 } 837 838 if (phydev->state < PHY_UP || 839 phydev->state > PHY_CABLETEST) { 840 NL_SET_ERR_MSG(extack, 841 "PHY not configured. Try setting interface up"); 842 err = -EBUSY; 843 goto out; 844 } 845 846 err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF); 847 if (err) 848 goto out; 849 850 /* Mark the carrier down until the test is complete */ 851 phy_link_down(phydev); 852 853 netif_testing_on(dev); 854 err = phydev->drv->cable_test_start(phydev); 855 if (err) { 856 netif_testing_off(dev); 857 phy_link_up(phydev); 858 goto out_free; 859 } 860 861 phydev->state = PHY_CABLETEST; 862 863 if (phy_polling_mode(phydev)) 864 phy_trigger_machine(phydev); 865 866 mutex_unlock(&phydev->lock); 867 868 return 0; 869 870 out_free: 871 ethnl_cable_test_free(phydev); 872 out: 873 mutex_unlock(&phydev->lock); 874 875 return err; 876 } 877 EXPORT_SYMBOL(phy_start_cable_test); 878 879 /** 880 * phy_start_cable_test_tdr - Start a raw TDR cable test 881 * 882 * @phydev: the phy_device struct 883 * @extack: extack for reporting useful error messages 884 * @config: Configuration of the test to run 885 */ 886 int phy_start_cable_test_tdr(struct phy_device *phydev, 887 struct netlink_ext_ack *extack, 888 const struct phy_tdr_config *config) 889 { 890 struct net_device *dev = phydev->attached_dev; 891 int err = -ENOMEM; 892 893 if (!(phydev->drv && 894 phydev->drv->cable_test_tdr_start && 895 phydev->drv->cable_test_get_status)) { 896 NL_SET_ERR_MSG(extack, 897 "PHY driver does not support cable test TDR"); 898 return -EOPNOTSUPP; 899 } 900 901 mutex_lock(&phydev->lock); 902 if (phydev->state == PHY_CABLETEST) { 903 NL_SET_ERR_MSG(extack, 904 "PHY already performing a test"); 905 err = -EBUSY; 906 goto out; 907 } 908 909 if (phydev->state < PHY_UP || 910 phydev->state > PHY_CABLETEST) { 911 NL_SET_ERR_MSG(extack, 912 "PHY not configured. Try setting interface up"); 913 err = -EBUSY; 914 goto out; 915 } 916 917 err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF); 918 if (err) 919 goto out; 920 921 /* Mark the carrier down until the test is complete */ 922 phy_link_down(phydev); 923 924 netif_testing_on(dev); 925 err = phydev->drv->cable_test_tdr_start(phydev, config); 926 if (err) { 927 netif_testing_off(dev); 928 phy_link_up(phydev); 929 goto out_free; 930 } 931 932 phydev->state = PHY_CABLETEST; 933 934 if (phy_polling_mode(phydev)) 935 phy_trigger_machine(phydev); 936 937 mutex_unlock(&phydev->lock); 938 939 return 0; 940 941 out_free: 942 ethnl_cable_test_free(phydev); 943 out: 944 mutex_unlock(&phydev->lock); 945 946 return err; 947 } 948 EXPORT_SYMBOL(phy_start_cable_test_tdr); 949 950 int phy_config_aneg(struct phy_device *phydev) 951 { 952 if (phydev->drv->config_aneg) 953 return phydev->drv->config_aneg(phydev); 954 955 /* Clause 45 PHYs that don't implement Clause 22 registers are not 956 * allowed to call genphy_config_aneg() 957 */ 958 if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0))) 959 return genphy_c45_config_aneg(phydev); 960 961 return genphy_config_aneg(phydev); 962 } 963 EXPORT_SYMBOL(phy_config_aneg); 964 965 /** 966 * phy_check_link_status - check link status and set state accordingly 967 * @phydev: the phy_device struct 968 * 969 * Description: Check for link and whether autoneg was triggered / is running 970 * and set state accordingly 971 */ 972 static int phy_check_link_status(struct phy_device *phydev) 973 { 974 int err; 975 976 lockdep_assert_held(&phydev->lock); 977 978 /* Keep previous state if loopback is enabled because some PHYs 979 * report that Link is Down when loopback is enabled. 980 */ 981 if (phydev->loopback_enabled) 982 return 0; 983 984 err = phy_read_status(phydev); 985 if (err) 986 return err; 987 988 if (phydev->link && phydev->state != PHY_RUNNING) { 989 phy_check_downshift(phydev); 990 phydev->state = PHY_RUNNING; 991 err = genphy_c45_eee_is_active(phydev, 992 NULL, NULL, NULL); 993 phydev->eee_active = err > 0; 994 phydev->enable_tx_lpi = phydev->eee_cfg.tx_lpi_enabled && 995 phydev->eee_active; 996 997 phy_link_up(phydev); 998 } else if (!phydev->link && phydev->state != PHY_NOLINK) { 999 phydev->state = PHY_NOLINK; 1000 phydev->eee_active = false; 1001 phydev->enable_tx_lpi = false; 1002 phy_link_down(phydev); 1003 } 1004 1005 return 0; 1006 } 1007 1008 /** 1009 * _phy_start_aneg - start auto-negotiation for this PHY device 1010 * @phydev: the phy_device struct 1011 * 1012 * Description: Sanitizes the settings (if we're not autonegotiating 1013 * them), and then calls the driver's config_aneg function. 1014 * If the PHYCONTROL Layer is operating, we change the state to 1015 * reflect the beginning of Auto-negotiation or forcing. 1016 */ 1017 int _phy_start_aneg(struct phy_device *phydev) 1018 { 1019 int err; 1020 1021 lockdep_assert_held(&phydev->lock); 1022 1023 if (!phydev->drv) 1024 return -EIO; 1025 1026 if (AUTONEG_DISABLE == phydev->autoneg) 1027 phy_sanitize_settings(phydev); 1028 1029 err = phy_config_aneg(phydev); 1030 if (err < 0) 1031 return err; 1032 1033 if (phy_is_started(phydev)) 1034 err = phy_check_link_status(phydev); 1035 1036 return err; 1037 } 1038 EXPORT_SYMBOL(_phy_start_aneg); 1039 1040 /** 1041 * phy_start_aneg - start auto-negotiation for this PHY device 1042 * @phydev: the phy_device struct 1043 * 1044 * Description: Sanitizes the settings (if we're not autonegotiating 1045 * them), and then calls the driver's config_aneg function. 1046 * If the PHYCONTROL Layer is operating, we change the state to 1047 * reflect the beginning of Auto-negotiation or forcing. 1048 */ 1049 int phy_start_aneg(struct phy_device *phydev) 1050 { 1051 int err; 1052 1053 mutex_lock(&phydev->lock); 1054 err = _phy_start_aneg(phydev); 1055 mutex_unlock(&phydev->lock); 1056 1057 return err; 1058 } 1059 EXPORT_SYMBOL(phy_start_aneg); 1060 1061 static int phy_poll_aneg_done(struct phy_device *phydev) 1062 { 1063 unsigned int retries = 100; 1064 int ret; 1065 1066 do { 1067 msleep(100); 1068 ret = phy_aneg_done(phydev); 1069 } while (!ret && --retries); 1070 1071 if (!ret) 1072 return -ETIMEDOUT; 1073 1074 return ret < 0 ? ret : 0; 1075 } 1076 1077 int phy_ethtool_ksettings_set(struct phy_device *phydev, 1078 const struct ethtool_link_ksettings *cmd) 1079 { 1080 __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising); 1081 u8 autoneg = cmd->base.autoneg; 1082 u8 duplex = cmd->base.duplex; 1083 u32 speed = cmd->base.speed; 1084 1085 if (cmd->base.phy_address != phydev->mdio.addr) 1086 return -EINVAL; 1087 1088 linkmode_copy(advertising, cmd->link_modes.advertising); 1089 1090 /* We make sure that we don't pass unsupported values in to the PHY */ 1091 linkmode_and(advertising, advertising, phydev->supported); 1092 1093 /* Verify the settings we care about. */ 1094 if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE) 1095 return -EINVAL; 1096 1097 if (autoneg == AUTONEG_ENABLE && 1098 (linkmode_empty(advertising) || 1099 !linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 1100 phydev->supported))) 1101 return -EINVAL; 1102 1103 if (autoneg == AUTONEG_DISABLE && 1104 ((speed != SPEED_1000 && 1105 speed != SPEED_100 && 1106 speed != SPEED_10) || 1107 (duplex != DUPLEX_HALF && 1108 duplex != DUPLEX_FULL))) 1109 return -EINVAL; 1110 1111 mutex_lock(&phydev->lock); 1112 phydev->autoneg = autoneg; 1113 1114 if (autoneg == AUTONEG_DISABLE) { 1115 phydev->speed = speed; 1116 phydev->duplex = duplex; 1117 } 1118 1119 linkmode_copy(phydev->advertising, advertising); 1120 1121 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 1122 phydev->advertising, autoneg == AUTONEG_ENABLE); 1123 1124 phydev->master_slave_set = cmd->base.master_slave_cfg; 1125 phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl; 1126 1127 /* Restart the PHY */ 1128 if (phy_is_started(phydev)) { 1129 phydev->state = PHY_UP; 1130 phy_trigger_machine(phydev); 1131 } else { 1132 _phy_start_aneg(phydev); 1133 } 1134 1135 mutex_unlock(&phydev->lock); 1136 return 0; 1137 } 1138 EXPORT_SYMBOL(phy_ethtool_ksettings_set); 1139 1140 /** 1141 * phy_speed_down - set speed to lowest speed supported by both link partners 1142 * @phydev: the phy_device struct 1143 * @sync: perform action synchronously 1144 * 1145 * Description: Typically used to save energy when waiting for a WoL packet 1146 * 1147 * WARNING: Setting sync to false may cause the system being unable to suspend 1148 * in case the PHY generates an interrupt when finishing the autonegotiation. 1149 * This interrupt may wake up the system immediately after suspend. 1150 * Therefore use sync = false only if you're sure it's safe with the respective 1151 * network chip. 1152 */ 1153 int phy_speed_down(struct phy_device *phydev, bool sync) 1154 { 1155 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp); 1156 int ret = 0; 1157 1158 mutex_lock(&phydev->lock); 1159 1160 if (phydev->autoneg != AUTONEG_ENABLE) 1161 goto out; 1162 1163 linkmode_copy(adv_tmp, phydev->advertising); 1164 1165 ret = phy_speed_down_core(phydev); 1166 if (ret) 1167 goto out; 1168 1169 linkmode_copy(phydev->adv_old, adv_tmp); 1170 1171 if (linkmode_equal(phydev->advertising, adv_tmp)) { 1172 ret = 0; 1173 goto out; 1174 } 1175 1176 ret = phy_config_aneg(phydev); 1177 if (ret) 1178 goto out; 1179 1180 ret = sync ? phy_poll_aneg_done(phydev) : 0; 1181 out: 1182 mutex_unlock(&phydev->lock); 1183 1184 return ret; 1185 } 1186 EXPORT_SYMBOL_GPL(phy_speed_down); 1187 1188 /** 1189 * phy_speed_up - (re)set advertised speeds to all supported speeds 1190 * @phydev: the phy_device struct 1191 * 1192 * Description: Used to revert the effect of phy_speed_down 1193 */ 1194 int phy_speed_up(struct phy_device *phydev) 1195 { 1196 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp); 1197 int ret = 0; 1198 1199 mutex_lock(&phydev->lock); 1200 1201 if (phydev->autoneg != AUTONEG_ENABLE) 1202 goto out; 1203 1204 if (linkmode_empty(phydev->adv_old)) 1205 goto out; 1206 1207 linkmode_copy(adv_tmp, phydev->advertising); 1208 linkmode_copy(phydev->advertising, phydev->adv_old); 1209 linkmode_zero(phydev->adv_old); 1210 1211 if (linkmode_equal(phydev->advertising, adv_tmp)) 1212 goto out; 1213 1214 ret = phy_config_aneg(phydev); 1215 out: 1216 mutex_unlock(&phydev->lock); 1217 1218 return ret; 1219 } 1220 EXPORT_SYMBOL_GPL(phy_speed_up); 1221 1222 /** 1223 * phy_start_machine - start PHY state machine tracking 1224 * @phydev: the phy_device struct 1225 * 1226 * Description: The PHY infrastructure can run a state machine 1227 * which tracks whether the PHY is starting up, negotiating, 1228 * etc. This function starts the delayed workqueue which tracks 1229 * the state of the PHY. If you want to maintain your own state machine, 1230 * do not call this function. 1231 */ 1232 void phy_start_machine(struct phy_device *phydev) 1233 { 1234 phy_trigger_machine(phydev); 1235 } 1236 EXPORT_SYMBOL_GPL(phy_start_machine); 1237 1238 /** 1239 * phy_stop_machine - stop the PHY state machine tracking 1240 * @phydev: target phy_device struct 1241 * 1242 * Description: Stops the state machine delayed workqueue, sets the 1243 * state to UP (unless it wasn't up yet). This function must be 1244 * called BEFORE phy_detach. 1245 */ 1246 void phy_stop_machine(struct phy_device *phydev) 1247 { 1248 cancel_delayed_work_sync(&phydev->state_queue); 1249 1250 mutex_lock(&phydev->lock); 1251 if (phy_is_started(phydev)) 1252 phydev->state = PHY_UP; 1253 mutex_unlock(&phydev->lock); 1254 } 1255 1256 static void phy_process_error(struct phy_device *phydev) 1257 { 1258 /* phydev->lock must be held for the state change to be safe */ 1259 if (!mutex_is_locked(&phydev->lock)) 1260 phydev_err(phydev, "PHY-device data unsafe context\n"); 1261 1262 phydev->state = PHY_ERROR; 1263 1264 phy_trigger_machine(phydev); 1265 } 1266 1267 static void phy_error_precise(struct phy_device *phydev, 1268 const void *func, int err) 1269 { 1270 WARN(1, "%pS: returned: %d\n", func, err); 1271 phy_process_error(phydev); 1272 } 1273 1274 /** 1275 * phy_error - enter ERROR state for this PHY device 1276 * @phydev: target phy_device struct 1277 * 1278 * Moves the PHY to the ERROR state in response to a read 1279 * or write error, and tells the controller the link is down. 1280 * Must be called with phydev->lock held. 1281 */ 1282 void phy_error(struct phy_device *phydev) 1283 { 1284 WARN_ON(1); 1285 phy_process_error(phydev); 1286 } 1287 EXPORT_SYMBOL(phy_error); 1288 1289 /** 1290 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side 1291 * @phydev: target phy_device struct 1292 */ 1293 int phy_disable_interrupts(struct phy_device *phydev) 1294 { 1295 /* Disable PHY interrupts */ 1296 return phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); 1297 } 1298 1299 /** 1300 * phy_interrupt - PHY interrupt handler 1301 * @irq: interrupt line 1302 * @phy_dat: phy_device pointer 1303 * 1304 * Description: Handle PHY interrupt 1305 */ 1306 static irqreturn_t phy_interrupt(int irq, void *phy_dat) 1307 { 1308 struct phy_device *phydev = phy_dat; 1309 irqreturn_t ret; 1310 1311 /* Wakeup interrupts may occur during a system sleep transition. 1312 * Postpone handling until the PHY has resumed. 1313 */ 1314 if (IS_ENABLED(CONFIG_PM_SLEEP) && phydev->irq_suspended) { 1315 struct net_device *netdev = phydev->attached_dev; 1316 1317 if (netdev) { 1318 struct device *parent = netdev->dev.parent; 1319 1320 if (netdev->ethtool->wol_enabled) 1321 pm_system_wakeup(); 1322 else if (device_may_wakeup(&netdev->dev)) 1323 pm_wakeup_dev_event(&netdev->dev, 0, true); 1324 else if (parent && device_may_wakeup(parent)) 1325 pm_wakeup_dev_event(parent, 0, true); 1326 } 1327 1328 phydev->irq_rerun = 1; 1329 disable_irq_nosync(irq); 1330 return IRQ_HANDLED; 1331 } 1332 1333 mutex_lock(&phydev->lock); 1334 ret = phydev->drv->handle_interrupt(phydev); 1335 mutex_unlock(&phydev->lock); 1336 1337 return ret; 1338 } 1339 1340 /** 1341 * phy_enable_interrupts - Enable the interrupts from the PHY side 1342 * @phydev: target phy_device struct 1343 */ 1344 static int phy_enable_interrupts(struct phy_device *phydev) 1345 { 1346 return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); 1347 } 1348 1349 /** 1350 * phy_request_interrupt - request and enable interrupt for a PHY device 1351 * @phydev: target phy_device struct 1352 * 1353 * Description: Request and enable the interrupt for the given PHY. 1354 * If this fails, then we set irq to PHY_POLL. 1355 * This should only be called with a valid IRQ number. 1356 */ 1357 void phy_request_interrupt(struct phy_device *phydev) 1358 { 1359 int err; 1360 1361 err = request_threaded_irq(phydev->irq, NULL, phy_interrupt, 1362 IRQF_ONESHOT | IRQF_SHARED, 1363 phydev_name(phydev), phydev); 1364 if (err) { 1365 phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n", 1366 err, phydev->irq); 1367 phydev->irq = PHY_POLL; 1368 } else { 1369 if (phy_enable_interrupts(phydev)) { 1370 phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n"); 1371 phy_free_interrupt(phydev); 1372 phydev->irq = PHY_POLL; 1373 } 1374 } 1375 } 1376 EXPORT_SYMBOL(phy_request_interrupt); 1377 1378 /** 1379 * phy_free_interrupt - disable and free interrupt for a PHY device 1380 * @phydev: target phy_device struct 1381 * 1382 * Description: Disable and free the interrupt for the given PHY. 1383 * This should only be called with a valid IRQ number. 1384 */ 1385 void phy_free_interrupt(struct phy_device *phydev) 1386 { 1387 phy_disable_interrupts(phydev); 1388 free_irq(phydev->irq, phydev); 1389 } 1390 EXPORT_SYMBOL(phy_free_interrupt); 1391 1392 enum phy_state_work { 1393 PHY_STATE_WORK_NONE, 1394 PHY_STATE_WORK_ANEG, 1395 PHY_STATE_WORK_SUSPEND, 1396 }; 1397 1398 static enum phy_state_work _phy_state_machine(struct phy_device *phydev) 1399 { 1400 enum phy_state_work state_work = PHY_STATE_WORK_NONE; 1401 struct net_device *dev = phydev->attached_dev; 1402 enum phy_state old_state = phydev->state; 1403 const void *func = NULL; 1404 bool finished = false; 1405 int err = 0; 1406 1407 switch (phydev->state) { 1408 case PHY_DOWN: 1409 case PHY_READY: 1410 break; 1411 case PHY_UP: 1412 state_work = PHY_STATE_WORK_ANEG; 1413 break; 1414 case PHY_NOLINK: 1415 case PHY_RUNNING: 1416 err = phy_check_link_status(phydev); 1417 func = &phy_check_link_status; 1418 break; 1419 case PHY_CABLETEST: 1420 err = phydev->drv->cable_test_get_status(phydev, &finished); 1421 if (err) { 1422 phy_abort_cable_test(phydev); 1423 netif_testing_off(dev); 1424 state_work = PHY_STATE_WORK_ANEG; 1425 phydev->state = PHY_UP; 1426 break; 1427 } 1428 1429 if (finished) { 1430 ethnl_cable_test_finished(phydev); 1431 netif_testing_off(dev); 1432 state_work = PHY_STATE_WORK_ANEG; 1433 phydev->state = PHY_UP; 1434 } 1435 break; 1436 case PHY_HALTED: 1437 case PHY_ERROR: 1438 if (phydev->link) { 1439 phydev->link = 0; 1440 phy_link_down(phydev); 1441 } 1442 state_work = PHY_STATE_WORK_SUSPEND; 1443 break; 1444 } 1445 1446 if (state_work == PHY_STATE_WORK_ANEG) { 1447 err = _phy_start_aneg(phydev); 1448 func = &_phy_start_aneg; 1449 } 1450 1451 if (err == -ENODEV) 1452 return state_work; 1453 1454 if (err < 0) 1455 phy_error_precise(phydev, func, err); 1456 1457 phy_process_state_change(phydev, old_state); 1458 1459 /* Only re-schedule a PHY state machine change if we are polling the 1460 * PHY, if PHY_MAC_INTERRUPT is set, then we will be moving 1461 * between states from phy_mac_interrupt(). 1462 * 1463 * In state PHY_HALTED the PHY gets suspended, so rescheduling the 1464 * state machine would be pointless and possibly error prone when 1465 * called from phy_disconnect() synchronously. 1466 */ 1467 if (phy_polling_mode(phydev) && phy_is_started(phydev)) 1468 phy_queue_state_machine(phydev, PHY_STATE_TIME); 1469 1470 return state_work; 1471 } 1472 1473 /* unlocked part of the PHY state machine */ 1474 static void _phy_state_machine_post_work(struct phy_device *phydev, 1475 enum phy_state_work state_work) 1476 { 1477 if (state_work == PHY_STATE_WORK_SUSPEND) 1478 phy_suspend(phydev); 1479 } 1480 1481 /** 1482 * phy_state_machine - Handle the state machine 1483 * @work: work_struct that describes the work to be done 1484 */ 1485 void phy_state_machine(struct work_struct *work) 1486 { 1487 struct delayed_work *dwork = to_delayed_work(work); 1488 struct phy_device *phydev = 1489 container_of(dwork, struct phy_device, state_queue); 1490 enum phy_state_work state_work; 1491 1492 mutex_lock(&phydev->lock); 1493 state_work = _phy_state_machine(phydev); 1494 mutex_unlock(&phydev->lock); 1495 1496 _phy_state_machine_post_work(phydev, state_work); 1497 } 1498 1499 /** 1500 * phy_stop - Bring down the PHY link, and stop checking the status 1501 * @phydev: target phy_device struct 1502 */ 1503 void phy_stop(struct phy_device *phydev) 1504 { 1505 struct net_device *dev = phydev->attached_dev; 1506 enum phy_state_work state_work; 1507 enum phy_state old_state; 1508 1509 if (!phy_is_started(phydev) && phydev->state != PHY_DOWN && 1510 phydev->state != PHY_ERROR) { 1511 WARN(1, "called from state %s\n", 1512 phy_state_to_str(phydev->state)); 1513 return; 1514 } 1515 1516 mutex_lock(&phydev->lock); 1517 old_state = phydev->state; 1518 1519 if (phydev->state == PHY_CABLETEST) { 1520 phy_abort_cable_test(phydev); 1521 netif_testing_off(dev); 1522 } 1523 1524 if (phydev->sfp_bus) 1525 sfp_upstream_stop(phydev->sfp_bus); 1526 1527 phydev->state = PHY_HALTED; 1528 phy_process_state_change(phydev, old_state); 1529 1530 state_work = _phy_state_machine(phydev); 1531 mutex_unlock(&phydev->lock); 1532 1533 _phy_state_machine_post_work(phydev, state_work); 1534 phy_stop_machine(phydev); 1535 1536 /* Cannot call flush_scheduled_work() here as desired because 1537 * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler 1538 * will not reenable interrupts. 1539 */ 1540 } 1541 EXPORT_SYMBOL(phy_stop); 1542 1543 /** 1544 * phy_start - start or restart a PHY device 1545 * @phydev: target phy_device struct 1546 * 1547 * Description: Indicates the attached device's readiness to 1548 * handle PHY-related work. Used during startup to start the 1549 * PHY, and after a call to phy_stop() to resume operation. 1550 * Also used to indicate the MDIO bus has cleared an error 1551 * condition. 1552 */ 1553 void phy_start(struct phy_device *phydev) 1554 { 1555 mutex_lock(&phydev->lock); 1556 1557 if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) { 1558 WARN(1, "called from state %s\n", 1559 phy_state_to_str(phydev->state)); 1560 goto out; 1561 } 1562 1563 if (phydev->sfp_bus) 1564 sfp_upstream_start(phydev->sfp_bus); 1565 1566 /* if phy was suspended, bring the physical link up again */ 1567 __phy_resume(phydev); 1568 1569 phydev->state = PHY_UP; 1570 1571 phy_start_machine(phydev); 1572 out: 1573 mutex_unlock(&phydev->lock); 1574 } 1575 EXPORT_SYMBOL(phy_start); 1576 1577 /** 1578 * phy_mac_interrupt - MAC says the link has changed 1579 * @phydev: phy_device struct with changed link 1580 * 1581 * The MAC layer is able to indicate there has been a change in the PHY link 1582 * status. Trigger the state machine and work a work queue. 1583 */ 1584 void phy_mac_interrupt(struct phy_device *phydev) 1585 { 1586 /* Trigger a state machine change */ 1587 phy_trigger_machine(phydev); 1588 } 1589 EXPORT_SYMBOL(phy_mac_interrupt); 1590 1591 /** 1592 * phy_init_eee - init and check the EEE feature 1593 * @phydev: target phy_device struct 1594 * @clk_stop_enable: PHY may stop the clock during LPI 1595 * 1596 * Description: it checks if the Energy-Efficient Ethernet (EEE) 1597 * is supported by looking at the MMD registers 3.20 and 7.60/61 1598 * and it programs the MMD register 3.0 setting the "Clock stop enable" 1599 * bit if required. 1600 */ 1601 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable) 1602 { 1603 int ret; 1604 1605 if (!phydev->drv) 1606 return -EIO; 1607 1608 ret = genphy_c45_eee_is_active(phydev, NULL, NULL, NULL); 1609 if (ret < 0) 1610 return ret; 1611 if (!ret) 1612 return -EPROTONOSUPPORT; 1613 1614 if (clk_stop_enable) 1615 /* Configure the PHY to stop receiving xMII 1616 * clock while it is signaling LPI. 1617 */ 1618 ret = phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, 1619 MDIO_PCS_CTRL1_CLKSTOP_EN); 1620 1621 return ret < 0 ? ret : 0; 1622 } 1623 EXPORT_SYMBOL(phy_init_eee); 1624 1625 /** 1626 * phy_get_eee_err - report the EEE wake error count 1627 * @phydev: target phy_device struct 1628 * 1629 * Description: it is to report the number of time where the PHY 1630 * failed to complete its normal wake sequence. 1631 */ 1632 int phy_get_eee_err(struct phy_device *phydev) 1633 { 1634 int ret; 1635 1636 if (!phydev->drv) 1637 return -EIO; 1638 1639 mutex_lock(&phydev->lock); 1640 ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR); 1641 mutex_unlock(&phydev->lock); 1642 1643 return ret; 1644 } 1645 EXPORT_SYMBOL(phy_get_eee_err); 1646 1647 /** 1648 * phy_ethtool_get_eee - get EEE supported and status 1649 * @phydev: target phy_device struct 1650 * @data: ethtool_keee data 1651 * 1652 * Description: reports the Supported/Advertisement/LP Advertisement 1653 * capabilities, etc. 1654 */ 1655 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_keee *data) 1656 { 1657 int ret; 1658 1659 if (!phydev->drv) 1660 return -EIO; 1661 1662 mutex_lock(&phydev->lock); 1663 ret = genphy_c45_ethtool_get_eee(phydev, data); 1664 eeecfg_to_eee(data, &phydev->eee_cfg); 1665 mutex_unlock(&phydev->lock); 1666 1667 return ret; 1668 } 1669 EXPORT_SYMBOL(phy_ethtool_get_eee); 1670 1671 /** 1672 * phy_ethtool_set_eee_noneg - Adjusts MAC LPI configuration without PHY 1673 * renegotiation 1674 * @phydev: pointer to the target PHY device structure 1675 * @old_cfg: pointer to the eee_config structure containing the old EEE settings 1676 * 1677 * This function updates the Energy Efficient Ethernet (EEE) configuration 1678 * for cases where only the MAC's Low Power Idle (LPI) configuration changes, 1679 * without triggering PHY renegotiation. It ensures that the MAC is properly 1680 * informed of the new LPI settings by cycling the link down and up, which 1681 * is necessary for the MAC to adopt the new configuration. This adjustment 1682 * is done only if there is a change in the tx_lpi_enabled or tx_lpi_timer 1683 * configuration. 1684 */ 1685 static void phy_ethtool_set_eee_noneg(struct phy_device *phydev, 1686 const struct eee_config *old_cfg) 1687 { 1688 bool enable_tx_lpi; 1689 1690 if (!phydev->link) 1691 return; 1692 1693 enable_tx_lpi = phydev->eee_cfg.tx_lpi_enabled && phydev->eee_active; 1694 1695 if (phydev->enable_tx_lpi != enable_tx_lpi || 1696 phydev->eee_cfg.tx_lpi_timer != old_cfg->tx_lpi_timer) { 1697 phydev->enable_tx_lpi = false; 1698 phydev->link = false; 1699 phy_link_down(phydev); 1700 phydev->enable_tx_lpi = enable_tx_lpi; 1701 phydev->link = true; 1702 phy_link_up(phydev); 1703 } 1704 } 1705 1706 /** 1707 * phy_ethtool_set_eee - set EEE supported and status 1708 * @phydev: target phy_device struct 1709 * @data: ethtool_keee data 1710 * 1711 * Description: it is to program the Advertisement EEE register. 1712 */ 1713 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_keee *data) 1714 { 1715 struct eee_config old_cfg; 1716 int ret; 1717 1718 if (!phydev->drv) 1719 return -EIO; 1720 1721 mutex_lock(&phydev->lock); 1722 1723 old_cfg = phydev->eee_cfg; 1724 eee_to_eeecfg(&phydev->eee_cfg, data); 1725 1726 ret = genphy_c45_ethtool_set_eee(phydev, data); 1727 if (ret == 0) 1728 phy_ethtool_set_eee_noneg(phydev, &old_cfg); 1729 else if (ret < 0) 1730 phydev->eee_cfg = old_cfg; 1731 1732 mutex_unlock(&phydev->lock); 1733 1734 return ret < 0 ? ret : 0; 1735 } 1736 EXPORT_SYMBOL(phy_ethtool_set_eee); 1737 1738 /** 1739 * phy_ethtool_set_wol - Configure Wake On LAN 1740 * 1741 * @phydev: target phy_device struct 1742 * @wol: Configuration requested 1743 */ 1744 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) 1745 { 1746 int ret; 1747 1748 if (phydev->drv && phydev->drv->set_wol) { 1749 mutex_lock(&phydev->lock); 1750 ret = phydev->drv->set_wol(phydev, wol); 1751 mutex_unlock(&phydev->lock); 1752 1753 return ret; 1754 } 1755 1756 return -EOPNOTSUPP; 1757 } 1758 EXPORT_SYMBOL(phy_ethtool_set_wol); 1759 1760 /** 1761 * phy_ethtool_get_wol - Get the current Wake On LAN configuration 1762 * 1763 * @phydev: target phy_device struct 1764 * @wol: Store the current configuration here 1765 */ 1766 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) 1767 { 1768 if (phydev->drv && phydev->drv->get_wol) { 1769 mutex_lock(&phydev->lock); 1770 phydev->drv->get_wol(phydev, wol); 1771 mutex_unlock(&phydev->lock); 1772 } 1773 } 1774 EXPORT_SYMBOL(phy_ethtool_get_wol); 1775 1776 int phy_ethtool_get_link_ksettings(struct net_device *ndev, 1777 struct ethtool_link_ksettings *cmd) 1778 { 1779 struct phy_device *phydev = ndev->phydev; 1780 1781 if (!phydev) 1782 return -ENODEV; 1783 1784 phy_ethtool_ksettings_get(phydev, cmd); 1785 1786 return 0; 1787 } 1788 EXPORT_SYMBOL(phy_ethtool_get_link_ksettings); 1789 1790 int phy_ethtool_set_link_ksettings(struct net_device *ndev, 1791 const struct ethtool_link_ksettings *cmd) 1792 { 1793 struct phy_device *phydev = ndev->phydev; 1794 1795 if (!phydev) 1796 return -ENODEV; 1797 1798 return phy_ethtool_ksettings_set(phydev, cmd); 1799 } 1800 EXPORT_SYMBOL(phy_ethtool_set_link_ksettings); 1801 1802 /** 1803 * phy_ethtool_nway_reset - Restart auto negotiation 1804 * @ndev: Network device to restart autoneg for 1805 */ 1806 int phy_ethtool_nway_reset(struct net_device *ndev) 1807 { 1808 struct phy_device *phydev = ndev->phydev; 1809 int ret; 1810 1811 if (!phydev) 1812 return -ENODEV; 1813 1814 if (!phydev->drv) 1815 return -EIO; 1816 1817 mutex_lock(&phydev->lock); 1818 ret = phy_restart_aneg(phydev); 1819 mutex_unlock(&phydev->lock); 1820 1821 return ret; 1822 } 1823 EXPORT_SYMBOL(phy_ethtool_nway_reset); 1824