| 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 | if (err <= 0) |
| 994 | phydev->enable_tx_lpi = false; |
| 995 | else |
| 996 | phydev->enable_tx_lpi = phydev->eee_cfg.tx_lpi_enabled; |
| 997 | |
| 998 | phy_link_up(phydev); |
| 999 | } else if (!phydev->link && phydev->state != PHY_NOLINK) { |
| 1000 | phydev->state = PHY_NOLINK; |
| 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 | * @data: pointer to the ethtool_keee structure containing the new 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 | struct ethtool_keee *data) |
| 1687 | { |
| 1688 | if (phydev->eee_cfg.tx_lpi_enabled != data->tx_lpi_enabled || |
| 1689 | phydev->eee_cfg.tx_lpi_timer != data->tx_lpi_timer) { |
| 1690 | eee_to_eeecfg(&phydev->eee_cfg, data); |
| 1691 | phydev->enable_tx_lpi = eeecfg_mac_can_tx_lpi(&phydev->eee_cfg); |
| 1692 | if (phydev->link) { |
| 1693 | phydev->link = false; |
| 1694 | phy_link_down(phydev); |
| 1695 | phydev->link = true; |
| 1696 | phy_link_up(phydev); |
| 1697 | } |
| 1698 | } |
| 1699 | } |
| 1700 | |
| 1701 | /** |
| 1702 | * phy_ethtool_set_eee - set EEE supported and status |
| 1703 | * @phydev: target phy_device struct |
| 1704 | * @data: ethtool_keee data |
| 1705 | * |
| 1706 | * Description: it is to program the Advertisement EEE register. |
| 1707 | */ |
| 1708 | int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_keee *data) |
| 1709 | { |
| 1710 | int ret; |
| 1711 | |
| 1712 | if (!phydev->drv) |
| 1713 | return -EIO; |
| 1714 | |
| 1715 | mutex_lock(&phydev->lock); |
| 1716 | ret = genphy_c45_ethtool_set_eee(phydev, data); |
| 1717 | if (ret >= 0) { |
| 1718 | if (ret == 0) |
| 1719 | phy_ethtool_set_eee_noneg(phydev, data); |
| 1720 | eee_to_eeecfg(&phydev->eee_cfg, data); |
| 1721 | } |
| 1722 | mutex_unlock(&phydev->lock); |
| 1723 | |
| 1724 | return ret < 0 ? ret : 0; |
| 1725 | } |
| 1726 | EXPORT_SYMBOL(phy_ethtool_set_eee); |
| 1727 | |
| 1728 | /** |
| 1729 | * phy_ethtool_set_wol - Configure Wake On LAN |
| 1730 | * |
| 1731 | * @phydev: target phy_device struct |
| 1732 | * @wol: Configuration requested |
| 1733 | */ |
| 1734 | int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) |
| 1735 | { |
| 1736 | int ret; |
| 1737 | |
| 1738 | if (phydev->drv && phydev->drv->set_wol) { |
| 1739 | mutex_lock(&phydev->lock); |
| 1740 | ret = phydev->drv->set_wol(phydev, wol); |
| 1741 | mutex_unlock(&phydev->lock); |
| 1742 | |
| 1743 | return ret; |
| 1744 | } |
| 1745 | |
| 1746 | return -EOPNOTSUPP; |
| 1747 | } |
| 1748 | EXPORT_SYMBOL(phy_ethtool_set_wol); |
| 1749 | |
| 1750 | /** |
| 1751 | * phy_ethtool_get_wol - Get the current Wake On LAN configuration |
| 1752 | * |
| 1753 | * @phydev: target phy_device struct |
| 1754 | * @wol: Store the current configuration here |
| 1755 | */ |
| 1756 | void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) |
| 1757 | { |
| 1758 | if (phydev->drv && phydev->drv->get_wol) { |
| 1759 | mutex_lock(&phydev->lock); |
| 1760 | phydev->drv->get_wol(phydev, wol); |
| 1761 | mutex_unlock(&phydev->lock); |
| 1762 | } |
| 1763 | } |
| 1764 | EXPORT_SYMBOL(phy_ethtool_get_wol); |
| 1765 | |
| 1766 | int phy_ethtool_get_link_ksettings(struct net_device *ndev, |
| 1767 | struct ethtool_link_ksettings *cmd) |
| 1768 | { |
| 1769 | struct phy_device *phydev = ndev->phydev; |
| 1770 | |
| 1771 | if (!phydev) |
| 1772 | return -ENODEV; |
| 1773 | |
| 1774 | phy_ethtool_ksettings_get(phydev, cmd); |
| 1775 | |
| 1776 | return 0; |
| 1777 | } |
| 1778 | EXPORT_SYMBOL(phy_ethtool_get_link_ksettings); |
| 1779 | |
| 1780 | int phy_ethtool_set_link_ksettings(struct net_device *ndev, |
| 1781 | const struct ethtool_link_ksettings *cmd) |
| 1782 | { |
| 1783 | struct phy_device *phydev = ndev->phydev; |
| 1784 | |
| 1785 | if (!phydev) |
| 1786 | return -ENODEV; |
| 1787 | |
| 1788 | return phy_ethtool_ksettings_set(phydev, cmd); |
| 1789 | } |
| 1790 | EXPORT_SYMBOL(phy_ethtool_set_link_ksettings); |
| 1791 | |
| 1792 | /** |
| 1793 | * phy_ethtool_nway_reset - Restart auto negotiation |
| 1794 | * @ndev: Network device to restart autoneg for |
| 1795 | */ |
| 1796 | int phy_ethtool_nway_reset(struct net_device *ndev) |
| 1797 | { |
| 1798 | struct phy_device *phydev = ndev->phydev; |
| 1799 | int ret; |
| 1800 | |
| 1801 | if (!phydev) |
| 1802 | return -ENODEV; |
| 1803 | |
| 1804 | if (!phydev->drv) |
| 1805 | return -EIO; |
| 1806 | |
| 1807 | mutex_lock(&phydev->lock); |
| 1808 | ret = phy_restart_aneg(phydev); |
| 1809 | mutex_unlock(&phydev->lock); |
| 1810 | |
| 1811 | return ret; |
| 1812 | } |
| 1813 | EXPORT_SYMBOL(phy_ethtool_nway_reset); |