1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * phylink models the MAC to optional PHY connection, supporting 4 * technologies such as SFP cages where the PHY is hot-pluggable. 5 * 6 * Copyright (C) 2015 Russell King 7 */ 8 #include <linux/ethtool.h> 9 #include <linux/export.h> 10 #include <linux/gpio/consumer.h> 11 #include <linux/netdevice.h> 12 #include <linux/of.h> 13 #include <linux/of_mdio.h> 14 #include <linux/phy.h> 15 #include <linux/phy_fixed.h> 16 #include <linux/phylink.h> 17 #include <linux/rtnetlink.h> 18 #include <linux/spinlock.h> 19 #include <linux/timer.h> 20 #include <linux/workqueue.h> 21 22 #include "sfp.h" 23 #include "swphy.h" 24 25 #define SUPPORTED_INTERFACES \ 26 (SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE | \ 27 SUPPORTED_BNC | SUPPORTED_AUI | SUPPORTED_Backplane) 28 #define ADVERTISED_INTERFACES \ 29 (ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \ 30 ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane) 31 32 enum { 33 PHYLINK_DISABLE_STOPPED, 34 PHYLINK_DISABLE_LINK, 35 }; 36 37 /** 38 * struct phylink - internal data type for phylink 39 */ 40 struct phylink { 41 /* private: */ 42 struct net_device *netdev; 43 const struct phylink_mac_ops *ops; 44 45 unsigned long phylink_disable_state; /* bitmask of disables */ 46 struct phy_device *phydev; 47 phy_interface_t link_interface; /* PHY_INTERFACE_xxx */ 48 u8 link_an_mode; /* MLO_AN_xxx */ 49 u8 link_port; /* The current non-phy ethtool port */ 50 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 51 52 /* The link configuration settings */ 53 struct phylink_link_state link_config; 54 55 /* The current settings */ 56 phy_interface_t cur_interface; 57 58 struct gpio_desc *link_gpio; 59 struct timer_list link_poll; 60 void (*get_fixed_state)(struct net_device *dev, 61 struct phylink_link_state *s); 62 63 struct mutex state_mutex; 64 struct phylink_link_state phy_state; 65 struct work_struct resolve; 66 67 bool mac_link_dropped; 68 69 struct sfp_bus *sfp_bus; 70 }; 71 72 /** 73 * phylink_set_port_modes() - set the port type modes in the ethtool mask 74 * @mask: ethtool link mode mask 75 * 76 * Sets all the port type modes in the ethtool mask. MAC drivers should 77 * use this in their 'validate' callback. 78 */ 79 void phylink_set_port_modes(unsigned long *mask) 80 { 81 phylink_set(mask, TP); 82 phylink_set(mask, AUI); 83 phylink_set(mask, MII); 84 phylink_set(mask, FIBRE); 85 phylink_set(mask, BNC); 86 phylink_set(mask, Backplane); 87 } 88 EXPORT_SYMBOL_GPL(phylink_set_port_modes); 89 90 static int phylink_is_empty_linkmode(const unsigned long *linkmode) 91 { 92 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, }; 93 94 phylink_set_port_modes(tmp); 95 phylink_set(tmp, Autoneg); 96 phylink_set(tmp, Pause); 97 phylink_set(tmp, Asym_Pause); 98 99 bitmap_andnot(tmp, linkmode, tmp, __ETHTOOL_LINK_MODE_MASK_NBITS); 100 101 return linkmode_empty(tmp); 102 } 103 104 static const char *phylink_an_mode_str(unsigned int mode) 105 { 106 static const char *modestr[] = { 107 [MLO_AN_PHY] = "phy", 108 [MLO_AN_FIXED] = "fixed", 109 [MLO_AN_INBAND] = "inband", 110 }; 111 112 return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown"; 113 } 114 115 static int phylink_validate(struct phylink *pl, unsigned long *supported, 116 struct phylink_link_state *state) 117 { 118 pl->ops->validate(pl->netdev, supported, state); 119 120 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; 121 } 122 123 static int phylink_parse_fixedlink(struct phylink *pl, 124 struct fwnode_handle *fwnode) 125 { 126 struct fwnode_handle *fixed_node; 127 const struct phy_setting *s; 128 struct gpio_desc *desc; 129 u32 speed; 130 int ret; 131 132 fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link"); 133 if (fixed_node) { 134 ret = fwnode_property_read_u32(fixed_node, "speed", &speed); 135 136 pl->link_config.speed = speed; 137 pl->link_config.duplex = DUPLEX_HALF; 138 139 if (fwnode_property_read_bool(fixed_node, "full-duplex")) 140 pl->link_config.duplex = DUPLEX_FULL; 141 142 /* We treat the "pause" and "asym-pause" terminology as 143 * defining the link partner's ability. */ 144 if (fwnode_property_read_bool(fixed_node, "pause")) 145 pl->link_config.pause |= MLO_PAUSE_SYM; 146 if (fwnode_property_read_bool(fixed_node, "asym-pause")) 147 pl->link_config.pause |= MLO_PAUSE_ASYM; 148 149 if (ret == 0) { 150 desc = fwnode_get_named_gpiod(fixed_node, "link-gpios", 151 0, GPIOD_IN, "?"); 152 153 if (!IS_ERR(desc)) 154 pl->link_gpio = desc; 155 else if (desc == ERR_PTR(-EPROBE_DEFER)) 156 ret = -EPROBE_DEFER; 157 } 158 fwnode_handle_put(fixed_node); 159 160 if (ret) 161 return ret; 162 } else { 163 u32 prop[5]; 164 165 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 166 NULL, 0); 167 if (ret != ARRAY_SIZE(prop)) { 168 netdev_err(pl->netdev, "broken fixed-link?\n"); 169 return -EINVAL; 170 } 171 172 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 173 prop, ARRAY_SIZE(prop)); 174 if (!ret) { 175 pl->link_config.duplex = prop[1] ? 176 DUPLEX_FULL : DUPLEX_HALF; 177 pl->link_config.speed = prop[2]; 178 if (prop[3]) 179 pl->link_config.pause |= MLO_PAUSE_SYM; 180 if (prop[4]) 181 pl->link_config.pause |= MLO_PAUSE_ASYM; 182 } 183 } 184 185 if (pl->link_config.speed > SPEED_1000 && 186 pl->link_config.duplex != DUPLEX_FULL) 187 netdev_warn(pl->netdev, "fixed link specifies half duplex for %dMbps link?\n", 188 pl->link_config.speed); 189 190 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 191 linkmode_copy(pl->link_config.advertising, pl->supported); 192 phylink_validate(pl, pl->supported, &pl->link_config); 193 194 s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex, 195 pl->supported, true); 196 linkmode_zero(pl->supported); 197 phylink_set(pl->supported, MII); 198 if (s) { 199 __set_bit(s->bit, pl->supported); 200 } else { 201 netdev_warn(pl->netdev, "fixed link %s duplex %dMbps not recognised\n", 202 pl->link_config.duplex == DUPLEX_FULL ? "full" : "half", 203 pl->link_config.speed); 204 } 205 206 linkmode_and(pl->link_config.advertising, pl->link_config.advertising, 207 pl->supported); 208 209 pl->link_config.link = 1; 210 pl->link_config.an_complete = 1; 211 212 return 0; 213 } 214 215 static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode) 216 { 217 struct fwnode_handle *dn; 218 const char *managed; 219 220 dn = fwnode_get_named_child_node(fwnode, "fixed-link"); 221 if (dn || fwnode_property_present(fwnode, "fixed-link")) 222 pl->link_an_mode = MLO_AN_FIXED; 223 fwnode_handle_put(dn); 224 225 if (fwnode_property_read_string(fwnode, "managed", &managed) == 0 && 226 strcmp(managed, "in-band-status") == 0) { 227 if (pl->link_an_mode == MLO_AN_FIXED) { 228 netdev_err(pl->netdev, 229 "can't use both fixed-link and in-band-status\n"); 230 return -EINVAL; 231 } 232 233 linkmode_zero(pl->supported); 234 phylink_set(pl->supported, MII); 235 phylink_set(pl->supported, Autoneg); 236 phylink_set(pl->supported, Asym_Pause); 237 phylink_set(pl->supported, Pause); 238 pl->link_config.an_enabled = true; 239 pl->link_an_mode = MLO_AN_INBAND; 240 241 switch (pl->link_config.interface) { 242 case PHY_INTERFACE_MODE_SGMII: 243 phylink_set(pl->supported, 10baseT_Half); 244 phylink_set(pl->supported, 10baseT_Full); 245 phylink_set(pl->supported, 100baseT_Half); 246 phylink_set(pl->supported, 100baseT_Full); 247 phylink_set(pl->supported, 1000baseT_Half); 248 phylink_set(pl->supported, 1000baseT_Full); 249 break; 250 251 case PHY_INTERFACE_MODE_1000BASEX: 252 phylink_set(pl->supported, 1000baseX_Full); 253 break; 254 255 case PHY_INTERFACE_MODE_2500BASEX: 256 phylink_set(pl->supported, 2500baseX_Full); 257 break; 258 259 case PHY_INTERFACE_MODE_10GKR: 260 phylink_set(pl->supported, 10baseT_Half); 261 phylink_set(pl->supported, 10baseT_Full); 262 phylink_set(pl->supported, 100baseT_Half); 263 phylink_set(pl->supported, 100baseT_Full); 264 phylink_set(pl->supported, 1000baseT_Half); 265 phylink_set(pl->supported, 1000baseT_Full); 266 phylink_set(pl->supported, 1000baseX_Full); 267 phylink_set(pl->supported, 10000baseKR_Full); 268 phylink_set(pl->supported, 10000baseCR_Full); 269 phylink_set(pl->supported, 10000baseSR_Full); 270 phylink_set(pl->supported, 10000baseLR_Full); 271 phylink_set(pl->supported, 10000baseLRM_Full); 272 phylink_set(pl->supported, 10000baseER_Full); 273 break; 274 275 default: 276 netdev_err(pl->netdev, 277 "incorrect link mode %s for in-band status\n", 278 phy_modes(pl->link_config.interface)); 279 return -EINVAL; 280 } 281 282 linkmode_copy(pl->link_config.advertising, pl->supported); 283 284 if (phylink_validate(pl, pl->supported, &pl->link_config)) { 285 netdev_err(pl->netdev, 286 "failed to validate link configuration for in-band status\n"); 287 return -EINVAL; 288 } 289 } 290 291 return 0; 292 } 293 294 static void phylink_mac_config(struct phylink *pl, 295 const struct phylink_link_state *state) 296 { 297 netdev_dbg(pl->netdev, 298 "%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n", 299 __func__, phylink_an_mode_str(pl->link_an_mode), 300 phy_modes(state->interface), 301 phy_speed_to_str(state->speed), 302 phy_duplex_to_str(state->duplex), 303 __ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising, 304 state->pause, state->link, state->an_enabled); 305 306 pl->ops->mac_config(pl->netdev, pl->link_an_mode, state); 307 } 308 309 static void phylink_mac_config_up(struct phylink *pl, 310 const struct phylink_link_state *state) 311 { 312 if (state->link) 313 phylink_mac_config(pl, state); 314 } 315 316 static void phylink_mac_an_restart(struct phylink *pl) 317 { 318 if (pl->link_config.an_enabled && 319 phy_interface_mode_is_8023z(pl->link_config.interface)) 320 pl->ops->mac_an_restart(pl->netdev); 321 } 322 323 static int phylink_get_mac_state(struct phylink *pl, struct phylink_link_state *state) 324 { 325 struct net_device *ndev = pl->netdev; 326 327 linkmode_copy(state->advertising, pl->link_config.advertising); 328 linkmode_zero(state->lp_advertising); 329 state->interface = pl->link_config.interface; 330 state->an_enabled = pl->link_config.an_enabled; 331 state->speed = SPEED_UNKNOWN; 332 state->duplex = DUPLEX_UNKNOWN; 333 state->pause = MLO_PAUSE_NONE; 334 state->an_complete = 0; 335 state->link = 1; 336 337 return pl->ops->mac_link_state(ndev, state); 338 } 339 340 /* The fixed state is... fixed except for the link state, 341 * which may be determined by a GPIO or a callback. 342 */ 343 static void phylink_get_fixed_state(struct phylink *pl, struct phylink_link_state *state) 344 { 345 *state = pl->link_config; 346 if (pl->get_fixed_state) 347 pl->get_fixed_state(pl->netdev, state); 348 else if (pl->link_gpio) 349 state->link = !!gpiod_get_value_cansleep(pl->link_gpio); 350 } 351 352 /* Flow control is resolved according to our and the link partners 353 * advertisements using the following drawn from the 802.3 specs: 354 * Local device Link partner 355 * Pause AsymDir Pause AsymDir Result 356 * 1 X 1 X TX+RX 357 * 0 1 1 1 RX 358 * 1 1 0 1 TX 359 */ 360 static void phylink_resolve_flow(struct phylink *pl, 361 struct phylink_link_state *state) 362 { 363 int new_pause = 0; 364 365 if (pl->link_config.pause & MLO_PAUSE_AN) { 366 int pause = 0; 367 368 if (phylink_test(pl->link_config.advertising, Pause)) 369 pause |= MLO_PAUSE_SYM; 370 if (phylink_test(pl->link_config.advertising, Asym_Pause)) 371 pause |= MLO_PAUSE_ASYM; 372 373 pause &= state->pause; 374 375 if (pause & MLO_PAUSE_SYM) 376 new_pause = MLO_PAUSE_TX | MLO_PAUSE_RX; 377 else if (pause & MLO_PAUSE_ASYM) 378 new_pause = state->pause & MLO_PAUSE_SYM ? 379 MLO_PAUSE_RX : MLO_PAUSE_TX; 380 } else { 381 new_pause = pl->link_config.pause & MLO_PAUSE_TXRX_MASK; 382 } 383 384 state->pause &= ~MLO_PAUSE_TXRX_MASK; 385 state->pause |= new_pause; 386 } 387 388 static const char *phylink_pause_to_str(int pause) 389 { 390 switch (pause & MLO_PAUSE_TXRX_MASK) { 391 case MLO_PAUSE_TX | MLO_PAUSE_RX: 392 return "rx/tx"; 393 case MLO_PAUSE_TX: 394 return "tx"; 395 case MLO_PAUSE_RX: 396 return "rx"; 397 default: 398 return "off"; 399 } 400 } 401 402 static void phylink_resolve(struct work_struct *w) 403 { 404 struct phylink *pl = container_of(w, struct phylink, resolve); 405 struct phylink_link_state link_state; 406 struct net_device *ndev = pl->netdev; 407 408 mutex_lock(&pl->state_mutex); 409 if (pl->phylink_disable_state) { 410 pl->mac_link_dropped = false; 411 link_state.link = false; 412 } else if (pl->mac_link_dropped) { 413 link_state.link = false; 414 } else { 415 switch (pl->link_an_mode) { 416 case MLO_AN_PHY: 417 link_state = pl->phy_state; 418 phylink_resolve_flow(pl, &link_state); 419 phylink_mac_config_up(pl, &link_state); 420 break; 421 422 case MLO_AN_FIXED: 423 phylink_get_fixed_state(pl, &link_state); 424 phylink_mac_config_up(pl, &link_state); 425 break; 426 427 case MLO_AN_INBAND: 428 phylink_get_mac_state(pl, &link_state); 429 430 /* If we have a phy, the "up" state is the union of 431 * both the PHY and the MAC */ 432 if (pl->phydev) 433 link_state.link &= pl->phy_state.link; 434 435 /* Only update if the PHY link is up */ 436 if (pl->phydev && pl->phy_state.link) { 437 link_state.interface = pl->phy_state.interface; 438 439 /* If we have a PHY, we need to update with 440 * the pause mode bits. */ 441 link_state.pause |= pl->phy_state.pause; 442 phylink_resolve_flow(pl, &link_state); 443 phylink_mac_config(pl, &link_state); 444 } 445 break; 446 } 447 } 448 449 if (link_state.link != netif_carrier_ok(ndev)) { 450 if (!link_state.link) { 451 netif_carrier_off(ndev); 452 pl->ops->mac_link_down(ndev, pl->link_an_mode, 453 pl->cur_interface); 454 netdev_info(ndev, "Link is Down\n"); 455 } else { 456 pl->cur_interface = link_state.interface; 457 pl->ops->mac_link_up(ndev, pl->link_an_mode, 458 pl->cur_interface, pl->phydev); 459 460 netif_carrier_on(ndev); 461 462 netdev_info(ndev, 463 "Link is Up - %s/%s - flow control %s\n", 464 phy_speed_to_str(link_state.speed), 465 phy_duplex_to_str(link_state.duplex), 466 phylink_pause_to_str(link_state.pause)); 467 } 468 } 469 if (!link_state.link && pl->mac_link_dropped) { 470 pl->mac_link_dropped = false; 471 queue_work(system_power_efficient_wq, &pl->resolve); 472 } 473 mutex_unlock(&pl->state_mutex); 474 } 475 476 static void phylink_run_resolve(struct phylink *pl) 477 { 478 if (!pl->phylink_disable_state) 479 queue_work(system_power_efficient_wq, &pl->resolve); 480 } 481 482 static void phylink_run_resolve_and_disable(struct phylink *pl, int bit) 483 { 484 unsigned long state = pl->phylink_disable_state; 485 486 set_bit(bit, &pl->phylink_disable_state); 487 if (state == 0) { 488 queue_work(system_power_efficient_wq, &pl->resolve); 489 flush_work(&pl->resolve); 490 } 491 } 492 493 static void phylink_fixed_poll(struct timer_list *t) 494 { 495 struct phylink *pl = container_of(t, struct phylink, link_poll); 496 497 mod_timer(t, jiffies + HZ); 498 499 phylink_run_resolve(pl); 500 } 501 502 static const struct sfp_upstream_ops sfp_phylink_ops; 503 504 static int phylink_register_sfp(struct phylink *pl, 505 struct fwnode_handle *fwnode) 506 { 507 struct fwnode_reference_args ref; 508 int ret; 509 510 if (!fwnode) 511 return 0; 512 513 ret = fwnode_property_get_reference_args(fwnode, "sfp", NULL, 514 0, 0, &ref); 515 if (ret < 0) { 516 if (ret == -ENOENT) 517 return 0; 518 519 netdev_err(pl->netdev, "unable to parse \"sfp\" node: %d\n", 520 ret); 521 return ret; 522 } 523 524 pl->sfp_bus = sfp_register_upstream(ref.fwnode, pl->netdev, pl, 525 &sfp_phylink_ops); 526 if (!pl->sfp_bus) 527 return -ENOMEM; 528 529 return 0; 530 } 531 532 /** 533 * phylink_create() - create a phylink instance 534 * @ndev: a pointer to the &struct net_device 535 * @fwnode: a pointer to a &struct fwnode_handle describing the network 536 * interface 537 * @iface: the desired link mode defined by &typedef phy_interface_t 538 * @ops: a pointer to a &struct phylink_mac_ops for the MAC. 539 * 540 * Create a new phylink instance, and parse the link parameters found in @np. 541 * This will parse in-band modes, fixed-link or SFP configuration. 542 * 543 * Returns a pointer to a &struct phylink, or an error-pointer value. Users 544 * must use IS_ERR() to check for errors from this function. 545 */ 546 struct phylink *phylink_create(struct net_device *ndev, 547 struct fwnode_handle *fwnode, 548 phy_interface_t iface, 549 const struct phylink_mac_ops *ops) 550 { 551 struct phylink *pl; 552 int ret; 553 554 pl = kzalloc(sizeof(*pl), GFP_KERNEL); 555 if (!pl) 556 return ERR_PTR(-ENOMEM); 557 558 mutex_init(&pl->state_mutex); 559 INIT_WORK(&pl->resolve, phylink_resolve); 560 pl->netdev = ndev; 561 pl->phy_state.interface = iface; 562 pl->link_interface = iface; 563 if (iface == PHY_INTERFACE_MODE_MOCA) 564 pl->link_port = PORT_BNC; 565 else 566 pl->link_port = PORT_MII; 567 pl->link_config.interface = iface; 568 pl->link_config.pause = MLO_PAUSE_AN; 569 pl->link_config.speed = SPEED_UNKNOWN; 570 pl->link_config.duplex = DUPLEX_UNKNOWN; 571 pl->link_config.an_enabled = true; 572 pl->ops = ops; 573 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 574 timer_setup(&pl->link_poll, phylink_fixed_poll, 0); 575 576 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 577 linkmode_copy(pl->link_config.advertising, pl->supported); 578 phylink_validate(pl, pl->supported, &pl->link_config); 579 580 ret = phylink_parse_mode(pl, fwnode); 581 if (ret < 0) { 582 kfree(pl); 583 return ERR_PTR(ret); 584 } 585 586 if (pl->link_an_mode == MLO_AN_FIXED) { 587 ret = phylink_parse_fixedlink(pl, fwnode); 588 if (ret < 0) { 589 kfree(pl); 590 return ERR_PTR(ret); 591 } 592 } 593 594 ret = phylink_register_sfp(pl, fwnode); 595 if (ret < 0) { 596 kfree(pl); 597 return ERR_PTR(ret); 598 } 599 600 return pl; 601 } 602 EXPORT_SYMBOL_GPL(phylink_create); 603 604 /** 605 * phylink_destroy() - cleanup and destroy the phylink instance 606 * @pl: a pointer to a &struct phylink returned from phylink_create() 607 * 608 * Destroy a phylink instance. Any PHY that has been attached must have been 609 * cleaned up via phylink_disconnect_phy() prior to calling this function. 610 */ 611 void phylink_destroy(struct phylink *pl) 612 { 613 if (pl->sfp_bus) 614 sfp_unregister_upstream(pl->sfp_bus); 615 if (!IS_ERR_OR_NULL(pl->link_gpio)) 616 gpiod_put(pl->link_gpio); 617 618 cancel_work_sync(&pl->resolve); 619 kfree(pl); 620 } 621 EXPORT_SYMBOL_GPL(phylink_destroy); 622 623 static void phylink_phy_change(struct phy_device *phydev, bool up, 624 bool do_carrier) 625 { 626 struct phylink *pl = phydev->phylink; 627 628 mutex_lock(&pl->state_mutex); 629 pl->phy_state.speed = phydev->speed; 630 pl->phy_state.duplex = phydev->duplex; 631 pl->phy_state.pause = MLO_PAUSE_NONE; 632 if (phydev->pause) 633 pl->phy_state.pause |= MLO_PAUSE_SYM; 634 if (phydev->asym_pause) 635 pl->phy_state.pause |= MLO_PAUSE_ASYM; 636 pl->phy_state.interface = phydev->interface; 637 pl->phy_state.link = up; 638 mutex_unlock(&pl->state_mutex); 639 640 phylink_run_resolve(pl); 641 642 netdev_dbg(pl->netdev, "phy link %s %s/%s/%s\n", up ? "up" : "down", 643 phy_modes(phydev->interface), 644 phy_speed_to_str(phydev->speed), 645 phy_duplex_to_str(phydev->duplex)); 646 } 647 648 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy) 649 { 650 struct phylink_link_state config; 651 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 652 int ret; 653 654 memset(&config, 0, sizeof(config)); 655 linkmode_copy(supported, phy->supported); 656 linkmode_copy(config.advertising, phy->advertising); 657 config.interface = pl->link_config.interface; 658 659 /* 660 * This is the new way of dealing with flow control for PHYs, 661 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 662 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 663 * using our validate call to the MAC, we rely upon the MAC 664 * clearing the bits from both supported and advertising fields. 665 */ 666 if (phylink_test(supported, Pause)) 667 phylink_set(config.advertising, Pause); 668 if (phylink_test(supported, Asym_Pause)) 669 phylink_set(config.advertising, Asym_Pause); 670 671 ret = phylink_validate(pl, supported, &config); 672 if (ret) 673 return ret; 674 675 phy->phylink = pl; 676 phy->phy_link_change = phylink_phy_change; 677 678 netdev_info(pl->netdev, 679 "PHY [%s] driver [%s]\n", dev_name(&phy->mdio.dev), 680 phy->drv->name); 681 682 mutex_lock(&phy->lock); 683 mutex_lock(&pl->state_mutex); 684 pl->phydev = phy; 685 linkmode_copy(pl->supported, supported); 686 linkmode_copy(pl->link_config.advertising, config.advertising); 687 688 /* Restrict the phy advertisement according to the MAC support. */ 689 linkmode_copy(phy->advertising, config.advertising); 690 mutex_unlock(&pl->state_mutex); 691 mutex_unlock(&phy->lock); 692 693 netdev_dbg(pl->netdev, 694 "phy: setting supported %*pb advertising %*pb\n", 695 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported, 696 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising); 697 698 if (phy_interrupt_is_valid(phy)) 699 phy_request_interrupt(phy); 700 701 return 0; 702 } 703 704 static int __phylink_connect_phy(struct phylink *pl, struct phy_device *phy, 705 phy_interface_t interface) 706 { 707 int ret; 708 709 if (WARN_ON(pl->link_an_mode == MLO_AN_FIXED || 710 (pl->link_an_mode == MLO_AN_INBAND && 711 phy_interface_mode_is_8023z(interface)))) 712 return -EINVAL; 713 714 if (pl->phydev) 715 return -EBUSY; 716 717 ret = phy_attach_direct(pl->netdev, phy, 0, interface); 718 if (ret) 719 return ret; 720 721 ret = phylink_bringup_phy(pl, phy); 722 if (ret) 723 phy_detach(phy); 724 725 return ret; 726 } 727 728 /** 729 * phylink_connect_phy() - connect a PHY to the phylink instance 730 * @pl: a pointer to a &struct phylink returned from phylink_create() 731 * @phy: a pointer to a &struct phy_device. 732 * 733 * Connect @phy to the phylink instance specified by @pl by calling 734 * phy_attach_direct(). Configure the @phy according to the MAC driver's 735 * capabilities, start the PHYLIB state machine and enable any interrupts 736 * that the PHY supports. 737 * 738 * This updates the phylink's ethtool supported and advertising link mode 739 * masks. 740 * 741 * Returns 0 on success or a negative errno. 742 */ 743 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy) 744 { 745 /* Use PHY device/driver interface */ 746 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 747 pl->link_interface = phy->interface; 748 pl->link_config.interface = pl->link_interface; 749 } 750 751 return __phylink_connect_phy(pl, phy, pl->link_interface); 752 } 753 EXPORT_SYMBOL_GPL(phylink_connect_phy); 754 755 /** 756 * phylink_of_phy_connect() - connect the PHY specified in the DT mode. 757 * @pl: a pointer to a &struct phylink returned from phylink_create() 758 * @dn: a pointer to a &struct device_node. 759 * @flags: PHY-specific flags to communicate to the PHY device driver 760 * 761 * Connect the phy specified in the device node @dn to the phylink instance 762 * specified by @pl. Actions specified in phylink_connect_phy() will be 763 * performed. 764 * 765 * Returns 0 on success or a negative errno. 766 */ 767 int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn, 768 u32 flags) 769 { 770 struct device_node *phy_node; 771 struct phy_device *phy_dev; 772 int ret; 773 774 /* Fixed links and 802.3z are handled without needing a PHY */ 775 if (pl->link_an_mode == MLO_AN_FIXED || 776 (pl->link_an_mode == MLO_AN_INBAND && 777 phy_interface_mode_is_8023z(pl->link_interface))) 778 return 0; 779 780 phy_node = of_parse_phandle(dn, "phy-handle", 0); 781 if (!phy_node) 782 phy_node = of_parse_phandle(dn, "phy", 0); 783 if (!phy_node) 784 phy_node = of_parse_phandle(dn, "phy-device", 0); 785 786 if (!phy_node) { 787 if (pl->link_an_mode == MLO_AN_PHY) 788 return -ENODEV; 789 return 0; 790 } 791 792 phy_dev = of_phy_attach(pl->netdev, phy_node, flags, 793 pl->link_interface); 794 /* We're done with the phy_node handle */ 795 of_node_put(phy_node); 796 797 if (!phy_dev) 798 return -ENODEV; 799 800 ret = phylink_bringup_phy(pl, phy_dev); 801 if (ret) 802 phy_detach(phy_dev); 803 804 return ret; 805 } 806 EXPORT_SYMBOL_GPL(phylink_of_phy_connect); 807 808 /** 809 * phylink_disconnect_phy() - disconnect any PHY attached to the phylink 810 * instance. 811 * @pl: a pointer to a &struct phylink returned from phylink_create() 812 * 813 * Disconnect any current PHY from the phylink instance described by @pl. 814 */ 815 void phylink_disconnect_phy(struct phylink *pl) 816 { 817 struct phy_device *phy; 818 819 ASSERT_RTNL(); 820 821 phy = pl->phydev; 822 if (phy) { 823 mutex_lock(&phy->lock); 824 mutex_lock(&pl->state_mutex); 825 pl->phydev = NULL; 826 mutex_unlock(&pl->state_mutex); 827 mutex_unlock(&phy->lock); 828 flush_work(&pl->resolve); 829 830 phy_disconnect(phy); 831 } 832 } 833 EXPORT_SYMBOL_GPL(phylink_disconnect_phy); 834 835 /** 836 * phylink_fixed_state_cb() - allow setting a fixed link callback 837 * @pl: a pointer to a &struct phylink returned from phylink_create() 838 * @cb: callback to execute to determine the fixed link state. 839 * 840 * The MAC driver should call this driver when the state of its link 841 * can be determined through e.g: an out of band MMIO register. 842 */ 843 int phylink_fixed_state_cb(struct phylink *pl, 844 void (*cb)(struct net_device *dev, 845 struct phylink_link_state *state)) 846 { 847 /* It does not make sense to let the link be overriden unless we use 848 * MLO_AN_FIXED 849 */ 850 if (pl->link_an_mode != MLO_AN_FIXED) 851 return -EINVAL; 852 853 mutex_lock(&pl->state_mutex); 854 pl->get_fixed_state = cb; 855 mutex_unlock(&pl->state_mutex); 856 857 return 0; 858 } 859 EXPORT_SYMBOL_GPL(phylink_fixed_state_cb); 860 861 /** 862 * phylink_mac_change() - notify phylink of a change in MAC state 863 * @pl: a pointer to a &struct phylink returned from phylink_create() 864 * @up: indicates whether the link is currently up. 865 * 866 * The MAC driver should call this driver when the state of its link 867 * changes (eg, link failure, new negotiation results, etc.) 868 */ 869 void phylink_mac_change(struct phylink *pl, bool up) 870 { 871 if (!up) 872 pl->mac_link_dropped = true; 873 phylink_run_resolve(pl); 874 netdev_dbg(pl->netdev, "mac link %s\n", up ? "up" : "down"); 875 } 876 EXPORT_SYMBOL_GPL(phylink_mac_change); 877 878 /** 879 * phylink_start() - start a phylink instance 880 * @pl: a pointer to a &struct phylink returned from phylink_create() 881 * 882 * Start the phylink instance specified by @pl, configuring the MAC for the 883 * desired link mode(s) and negotiation style. This should be called from the 884 * network device driver's &struct net_device_ops ndo_open() method. 885 */ 886 void phylink_start(struct phylink *pl) 887 { 888 ASSERT_RTNL(); 889 890 netdev_info(pl->netdev, "configuring for %s/%s link mode\n", 891 phylink_an_mode_str(pl->link_an_mode), 892 phy_modes(pl->link_config.interface)); 893 894 /* Always set the carrier off */ 895 netif_carrier_off(pl->netdev); 896 897 /* Apply the link configuration to the MAC when starting. This allows 898 * a fixed-link to start with the correct parameters, and also 899 * ensures that we set the appropriate advertisement for Serdes links. 900 */ 901 phylink_resolve_flow(pl, &pl->link_config); 902 phylink_mac_config(pl, &pl->link_config); 903 904 /* Restart autonegotiation if using 802.3z to ensure that the link 905 * parameters are properly negotiated. This is necessary for DSA 906 * switches using 802.3z negotiation to ensure they see our modes. 907 */ 908 phylink_mac_an_restart(pl); 909 910 clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 911 phylink_run_resolve(pl); 912 913 if (pl->link_an_mode == MLO_AN_FIXED && !IS_ERR(pl->link_gpio)) 914 mod_timer(&pl->link_poll, jiffies + HZ); 915 if (pl->sfp_bus) 916 sfp_upstream_start(pl->sfp_bus); 917 if (pl->phydev) 918 phy_start(pl->phydev); 919 } 920 EXPORT_SYMBOL_GPL(phylink_start); 921 922 /** 923 * phylink_stop() - stop a phylink instance 924 * @pl: a pointer to a &struct phylink returned from phylink_create() 925 * 926 * Stop the phylink instance specified by @pl. This should be called from the 927 * network device driver's &struct net_device_ops ndo_stop() method. The 928 * network device's carrier state should not be changed prior to calling this 929 * function. 930 */ 931 void phylink_stop(struct phylink *pl) 932 { 933 ASSERT_RTNL(); 934 935 if (pl->phydev) 936 phy_stop(pl->phydev); 937 if (pl->sfp_bus) 938 sfp_upstream_stop(pl->sfp_bus); 939 if (pl->link_an_mode == MLO_AN_FIXED && !IS_ERR(pl->link_gpio)) 940 del_timer_sync(&pl->link_poll); 941 942 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED); 943 } 944 EXPORT_SYMBOL_GPL(phylink_stop); 945 946 /** 947 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY 948 * @pl: a pointer to a &struct phylink returned from phylink_create() 949 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters 950 * 951 * Read the wake on lan parameters from the PHY attached to the phylink 952 * instance specified by @pl. If no PHY is currently attached, report no 953 * support for wake on lan. 954 */ 955 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 956 { 957 ASSERT_RTNL(); 958 959 wol->supported = 0; 960 wol->wolopts = 0; 961 962 if (pl->phydev) 963 phy_ethtool_get_wol(pl->phydev, wol); 964 } 965 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol); 966 967 /** 968 * phylink_ethtool_set_wol() - set wake on lan parameters 969 * @pl: a pointer to a &struct phylink returned from phylink_create() 970 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters 971 * 972 * Set the wake on lan parameters for the PHY attached to the phylink 973 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP 974 * error. 975 * 976 * Returns zero on success or negative errno code. 977 */ 978 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 979 { 980 int ret = -EOPNOTSUPP; 981 982 ASSERT_RTNL(); 983 984 if (pl->phydev) 985 ret = phy_ethtool_set_wol(pl->phydev, wol); 986 987 return ret; 988 } 989 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol); 990 991 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b) 992 { 993 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask); 994 995 linkmode_zero(mask); 996 phylink_set_port_modes(mask); 997 998 linkmode_and(dst, dst, mask); 999 linkmode_or(dst, dst, b); 1000 } 1001 1002 static void phylink_get_ksettings(const struct phylink_link_state *state, 1003 struct ethtool_link_ksettings *kset) 1004 { 1005 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising); 1006 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising); 1007 kset->base.speed = state->speed; 1008 kset->base.duplex = state->duplex; 1009 kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE : 1010 AUTONEG_DISABLE; 1011 } 1012 1013 /** 1014 * phylink_ethtool_ksettings_get() - get the current link settings 1015 * @pl: a pointer to a &struct phylink returned from phylink_create() 1016 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings 1017 * 1018 * Read the current link settings for the phylink instance specified by @pl. 1019 * This will be the link settings read from the MAC, PHY or fixed link 1020 * settings depending on the current negotiation mode. 1021 */ 1022 int phylink_ethtool_ksettings_get(struct phylink *pl, 1023 struct ethtool_link_ksettings *kset) 1024 { 1025 struct phylink_link_state link_state; 1026 1027 ASSERT_RTNL(); 1028 1029 if (pl->phydev) { 1030 phy_ethtool_ksettings_get(pl->phydev, kset); 1031 } else { 1032 kset->base.port = pl->link_port; 1033 } 1034 1035 linkmode_copy(kset->link_modes.supported, pl->supported); 1036 1037 switch (pl->link_an_mode) { 1038 case MLO_AN_FIXED: 1039 /* We are using fixed settings. Report these as the 1040 * current link settings - and note that these also 1041 * represent the supported speeds/duplex/pause modes. 1042 */ 1043 phylink_get_fixed_state(pl, &link_state); 1044 phylink_get_ksettings(&link_state, kset); 1045 break; 1046 1047 case MLO_AN_INBAND: 1048 /* If there is a phy attached, then use the reported 1049 * settings from the phy with no modification. 1050 */ 1051 if (pl->phydev) 1052 break; 1053 1054 phylink_get_mac_state(pl, &link_state); 1055 1056 /* The MAC is reporting the link results from its own PCS 1057 * layer via in-band status. Report these as the current 1058 * link settings. 1059 */ 1060 phylink_get_ksettings(&link_state, kset); 1061 break; 1062 } 1063 1064 return 0; 1065 } 1066 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get); 1067 1068 /** 1069 * phylink_ethtool_ksettings_set() - set the link settings 1070 * @pl: a pointer to a &struct phylink returned from phylink_create() 1071 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes 1072 */ 1073 int phylink_ethtool_ksettings_set(struct phylink *pl, 1074 const struct ethtool_link_ksettings *kset) 1075 { 1076 struct ethtool_link_ksettings our_kset; 1077 struct phylink_link_state config; 1078 int ret; 1079 1080 ASSERT_RTNL(); 1081 1082 if (kset->base.autoneg != AUTONEG_DISABLE && 1083 kset->base.autoneg != AUTONEG_ENABLE) 1084 return -EINVAL; 1085 1086 config = pl->link_config; 1087 1088 /* Mask out unsupported advertisements */ 1089 linkmode_and(config.advertising, kset->link_modes.advertising, 1090 pl->supported); 1091 1092 /* FIXME: should we reject autoneg if phy/mac does not support it? */ 1093 if (kset->base.autoneg == AUTONEG_DISABLE) { 1094 const struct phy_setting *s; 1095 1096 /* Autonegotiation disabled, select a suitable speed and 1097 * duplex. 1098 */ 1099 s = phy_lookup_setting(kset->base.speed, kset->base.duplex, 1100 pl->supported, false); 1101 if (!s) 1102 return -EINVAL; 1103 1104 /* If we have a fixed link (as specified by firmware), refuse 1105 * to change link parameters. 1106 */ 1107 if (pl->link_an_mode == MLO_AN_FIXED && 1108 (s->speed != pl->link_config.speed || 1109 s->duplex != pl->link_config.duplex)) 1110 return -EINVAL; 1111 1112 config.speed = s->speed; 1113 config.duplex = s->duplex; 1114 config.an_enabled = false; 1115 1116 __clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising); 1117 } else { 1118 /* If we have a fixed link, refuse to enable autonegotiation */ 1119 if (pl->link_an_mode == MLO_AN_FIXED) 1120 return -EINVAL; 1121 1122 config.speed = SPEED_UNKNOWN; 1123 config.duplex = DUPLEX_UNKNOWN; 1124 config.an_enabled = true; 1125 1126 __set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising); 1127 } 1128 1129 if (phylink_validate(pl, pl->supported, &config)) 1130 return -EINVAL; 1131 1132 /* If autonegotiation is enabled, we must have an advertisement */ 1133 if (config.an_enabled && phylink_is_empty_linkmode(config.advertising)) 1134 return -EINVAL; 1135 1136 our_kset = *kset; 1137 linkmode_copy(our_kset.link_modes.advertising, config.advertising); 1138 our_kset.base.speed = config.speed; 1139 our_kset.base.duplex = config.duplex; 1140 1141 /* If we have a PHY, configure the phy */ 1142 if (pl->phydev) { 1143 ret = phy_ethtool_ksettings_set(pl->phydev, &our_kset); 1144 if (ret) 1145 return ret; 1146 } 1147 1148 mutex_lock(&pl->state_mutex); 1149 /* Configure the MAC to match the new settings */ 1150 linkmode_copy(pl->link_config.advertising, our_kset.link_modes.advertising); 1151 pl->link_config.interface = config.interface; 1152 pl->link_config.speed = our_kset.base.speed; 1153 pl->link_config.duplex = our_kset.base.duplex; 1154 pl->link_config.an_enabled = our_kset.base.autoneg != AUTONEG_DISABLE; 1155 1156 if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) { 1157 phylink_mac_config(pl, &pl->link_config); 1158 phylink_mac_an_restart(pl); 1159 } 1160 mutex_unlock(&pl->state_mutex); 1161 1162 return 0; 1163 } 1164 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set); 1165 1166 /** 1167 * phylink_ethtool_nway_reset() - restart negotiation 1168 * @pl: a pointer to a &struct phylink returned from phylink_create() 1169 * 1170 * Restart negotiation for the phylink instance specified by @pl. This will 1171 * cause any attached phy to restart negotiation with the link partner, and 1172 * if the MAC is in a BaseX mode, the MAC will also be requested to restart 1173 * negotiation. 1174 * 1175 * Returns zero on success, or negative error code. 1176 */ 1177 int phylink_ethtool_nway_reset(struct phylink *pl) 1178 { 1179 int ret = 0; 1180 1181 ASSERT_RTNL(); 1182 1183 if (pl->phydev) 1184 ret = phy_restart_aneg(pl->phydev); 1185 phylink_mac_an_restart(pl); 1186 1187 return ret; 1188 } 1189 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset); 1190 1191 /** 1192 * phylink_ethtool_get_pauseparam() - get the current pause parameters 1193 * @pl: a pointer to a &struct phylink returned from phylink_create() 1194 * @pause: a pointer to a &struct ethtool_pauseparam 1195 */ 1196 void phylink_ethtool_get_pauseparam(struct phylink *pl, 1197 struct ethtool_pauseparam *pause) 1198 { 1199 ASSERT_RTNL(); 1200 1201 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN); 1202 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX); 1203 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX); 1204 } 1205 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam); 1206 1207 /** 1208 * phylink_ethtool_set_pauseparam() - set the current pause parameters 1209 * @pl: a pointer to a &struct phylink returned from phylink_create() 1210 * @pause: a pointer to a &struct ethtool_pauseparam 1211 */ 1212 int phylink_ethtool_set_pauseparam(struct phylink *pl, 1213 struct ethtool_pauseparam *pause) 1214 { 1215 struct phylink_link_state *config = &pl->link_config; 1216 1217 ASSERT_RTNL(); 1218 1219 if (!phylink_test(pl->supported, Pause) && 1220 !phylink_test(pl->supported, Asym_Pause)) 1221 return -EOPNOTSUPP; 1222 1223 if (!phylink_test(pl->supported, Asym_Pause) && 1224 !pause->autoneg && pause->rx_pause != pause->tx_pause) 1225 return -EINVAL; 1226 1227 config->pause &= ~(MLO_PAUSE_AN | MLO_PAUSE_TXRX_MASK); 1228 1229 if (pause->autoneg) 1230 config->pause |= MLO_PAUSE_AN; 1231 if (pause->rx_pause) 1232 config->pause |= MLO_PAUSE_RX; 1233 if (pause->tx_pause) 1234 config->pause |= MLO_PAUSE_TX; 1235 1236 if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) { 1237 switch (pl->link_an_mode) { 1238 case MLO_AN_PHY: 1239 /* Silently mark the carrier down, and then trigger a resolve */ 1240 netif_carrier_off(pl->netdev); 1241 phylink_run_resolve(pl); 1242 break; 1243 1244 case MLO_AN_FIXED: 1245 /* Should we allow fixed links to change against the config? */ 1246 phylink_resolve_flow(pl, config); 1247 phylink_mac_config(pl, config); 1248 break; 1249 1250 case MLO_AN_INBAND: 1251 phylink_mac_config(pl, config); 1252 phylink_mac_an_restart(pl); 1253 break; 1254 } 1255 } 1256 1257 return 0; 1258 } 1259 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam); 1260 1261 /** 1262 * phylink_ethtool_get_eee_err() - read the energy efficient ethernet error 1263 * counter 1264 * @pl: a pointer to a &struct phylink returned from phylink_create(). 1265 * 1266 * Read the Energy Efficient Ethernet error counter from the PHY associated 1267 * with the phylink instance specified by @pl. 1268 * 1269 * Returns positive error counter value, or negative error code. 1270 */ 1271 int phylink_get_eee_err(struct phylink *pl) 1272 { 1273 int ret = 0; 1274 1275 ASSERT_RTNL(); 1276 1277 if (pl->phydev) 1278 ret = phy_get_eee_err(pl->phydev); 1279 1280 return ret; 1281 } 1282 EXPORT_SYMBOL_GPL(phylink_get_eee_err); 1283 1284 /** 1285 * phylink_init_eee() - init and check the EEE features 1286 * @pl: a pointer to a &struct phylink returned from phylink_create() 1287 * @clk_stop_enable: allow PHY to stop receive clock 1288 * 1289 * Must be called either with RTNL held or within mac_link_up() 1290 */ 1291 int phylink_init_eee(struct phylink *pl, bool clk_stop_enable) 1292 { 1293 int ret = -EOPNOTSUPP; 1294 1295 if (pl->phydev) 1296 ret = phy_init_eee(pl->phydev, clk_stop_enable); 1297 1298 return ret; 1299 } 1300 EXPORT_SYMBOL_GPL(phylink_init_eee); 1301 1302 /** 1303 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters 1304 * @pl: a pointer to a &struct phylink returned from phylink_create() 1305 * @eee: a pointer to a &struct ethtool_eee for the read parameters 1306 */ 1307 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee) 1308 { 1309 int ret = -EOPNOTSUPP; 1310 1311 ASSERT_RTNL(); 1312 1313 if (pl->phydev) 1314 ret = phy_ethtool_get_eee(pl->phydev, eee); 1315 1316 return ret; 1317 } 1318 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee); 1319 1320 /** 1321 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters 1322 * @pl: a pointer to a &struct phylink returned from phylink_create() 1323 * @eee: a pointer to a &struct ethtool_eee for the desired parameters 1324 */ 1325 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee) 1326 { 1327 int ret = -EOPNOTSUPP; 1328 1329 ASSERT_RTNL(); 1330 1331 if (pl->phydev) 1332 ret = phy_ethtool_set_eee(pl->phydev, eee); 1333 1334 return ret; 1335 } 1336 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee); 1337 1338 /* This emulates MII registers for a fixed-mode phy operating as per the 1339 * passed in state. "aneg" defines if we report negotiation is possible. 1340 * 1341 * FIXME: should deal with negotiation state too. 1342 */ 1343 static int phylink_mii_emul_read(struct net_device *ndev, unsigned int reg, 1344 struct phylink_link_state *state, bool aneg) 1345 { 1346 struct fixed_phy_status fs; 1347 int val; 1348 1349 fs.link = state->link; 1350 fs.speed = state->speed; 1351 fs.duplex = state->duplex; 1352 fs.pause = state->pause & MLO_PAUSE_SYM; 1353 fs.asym_pause = state->pause & MLO_PAUSE_ASYM; 1354 1355 val = swphy_read_reg(reg, &fs); 1356 if (reg == MII_BMSR) { 1357 if (!state->an_complete) 1358 val &= ~BMSR_ANEGCOMPLETE; 1359 if (!aneg) 1360 val &= ~BMSR_ANEGCAPABLE; 1361 } 1362 return val; 1363 } 1364 1365 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id, 1366 unsigned int reg) 1367 { 1368 struct phy_device *phydev = pl->phydev; 1369 int prtad, devad; 1370 1371 if (mdio_phy_id_is_c45(phy_id)) { 1372 prtad = mdio_phy_id_prtad(phy_id); 1373 devad = mdio_phy_id_devad(phy_id); 1374 devad = MII_ADDR_C45 | devad << 16 | reg; 1375 } else if (phydev->is_c45) { 1376 switch (reg) { 1377 case MII_BMCR: 1378 case MII_BMSR: 1379 case MII_PHYSID1: 1380 case MII_PHYSID2: 1381 devad = __ffs(phydev->c45_ids.devices_in_package); 1382 break; 1383 case MII_ADVERTISE: 1384 case MII_LPA: 1385 if (!(phydev->c45_ids.devices_in_package & MDIO_DEVS_AN)) 1386 return -EINVAL; 1387 devad = MDIO_MMD_AN; 1388 if (reg == MII_ADVERTISE) 1389 reg = MDIO_AN_ADVERTISE; 1390 else 1391 reg = MDIO_AN_LPA; 1392 break; 1393 default: 1394 return -EINVAL; 1395 } 1396 prtad = phy_id; 1397 devad = MII_ADDR_C45 | devad << 16 | reg; 1398 } else { 1399 prtad = phy_id; 1400 devad = reg; 1401 } 1402 return mdiobus_read(pl->phydev->mdio.bus, prtad, devad); 1403 } 1404 1405 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id, 1406 unsigned int reg, unsigned int val) 1407 { 1408 struct phy_device *phydev = pl->phydev; 1409 int prtad, devad; 1410 1411 if (mdio_phy_id_is_c45(phy_id)) { 1412 prtad = mdio_phy_id_prtad(phy_id); 1413 devad = mdio_phy_id_devad(phy_id); 1414 devad = MII_ADDR_C45 | devad << 16 | reg; 1415 } else if (phydev->is_c45) { 1416 switch (reg) { 1417 case MII_BMCR: 1418 case MII_BMSR: 1419 case MII_PHYSID1: 1420 case MII_PHYSID2: 1421 devad = __ffs(phydev->c45_ids.devices_in_package); 1422 break; 1423 case MII_ADVERTISE: 1424 case MII_LPA: 1425 if (!(phydev->c45_ids.devices_in_package & MDIO_DEVS_AN)) 1426 return -EINVAL; 1427 devad = MDIO_MMD_AN; 1428 if (reg == MII_ADVERTISE) 1429 reg = MDIO_AN_ADVERTISE; 1430 else 1431 reg = MDIO_AN_LPA; 1432 break; 1433 default: 1434 return -EINVAL; 1435 } 1436 prtad = phy_id; 1437 devad = MII_ADDR_C45 | devad << 16 | reg; 1438 } else { 1439 prtad = phy_id; 1440 devad = reg; 1441 } 1442 1443 return mdiobus_write(phydev->mdio.bus, prtad, devad, val); 1444 } 1445 1446 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id, 1447 unsigned int reg) 1448 { 1449 struct phylink_link_state state; 1450 int val = 0xffff; 1451 1452 switch (pl->link_an_mode) { 1453 case MLO_AN_FIXED: 1454 if (phy_id == 0) { 1455 phylink_get_fixed_state(pl, &state); 1456 val = phylink_mii_emul_read(pl->netdev, reg, &state, 1457 true); 1458 } 1459 break; 1460 1461 case MLO_AN_PHY: 1462 return -EOPNOTSUPP; 1463 1464 case MLO_AN_INBAND: 1465 if (phy_id == 0) { 1466 val = phylink_get_mac_state(pl, &state); 1467 if (val < 0) 1468 return val; 1469 1470 val = phylink_mii_emul_read(pl->netdev, reg, &state, 1471 true); 1472 } 1473 break; 1474 } 1475 1476 return val & 0xffff; 1477 } 1478 1479 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id, 1480 unsigned int reg, unsigned int val) 1481 { 1482 switch (pl->link_an_mode) { 1483 case MLO_AN_FIXED: 1484 break; 1485 1486 case MLO_AN_PHY: 1487 return -EOPNOTSUPP; 1488 1489 case MLO_AN_INBAND: 1490 break; 1491 } 1492 1493 return 0; 1494 } 1495 1496 /** 1497 * phylink_mii_ioctl() - generic mii ioctl interface 1498 * @pl: a pointer to a &struct phylink returned from phylink_create() 1499 * @ifr: a pointer to a &struct ifreq for socket ioctls 1500 * @cmd: ioctl cmd to execute 1501 * 1502 * Perform the specified MII ioctl on the PHY attached to the phylink instance 1503 * specified by @pl. If no PHY is attached, emulate the presence of the PHY. 1504 * 1505 * Returns: zero on success or negative error code. 1506 * 1507 * %SIOCGMIIPHY: 1508 * read register from the current PHY. 1509 * %SIOCGMIIREG: 1510 * read register from the specified PHY. 1511 * %SIOCSMIIREG: 1512 * set a register on the specified PHY. 1513 */ 1514 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd) 1515 { 1516 struct mii_ioctl_data *mii = if_mii(ifr); 1517 int ret; 1518 1519 ASSERT_RTNL(); 1520 1521 if (pl->phydev) { 1522 /* PHYs only exist for MLO_AN_PHY and SGMII */ 1523 switch (cmd) { 1524 case SIOCGMIIPHY: 1525 mii->phy_id = pl->phydev->mdio.addr; 1526 /* fall through */ 1527 1528 case SIOCGMIIREG: 1529 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num); 1530 if (ret >= 0) { 1531 mii->val_out = ret; 1532 ret = 0; 1533 } 1534 break; 1535 1536 case SIOCSMIIREG: 1537 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num, 1538 mii->val_in); 1539 break; 1540 1541 default: 1542 ret = phy_mii_ioctl(pl->phydev, ifr, cmd); 1543 break; 1544 } 1545 } else { 1546 switch (cmd) { 1547 case SIOCGMIIPHY: 1548 mii->phy_id = 0; 1549 /* fall through */ 1550 1551 case SIOCGMIIREG: 1552 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num); 1553 if (ret >= 0) { 1554 mii->val_out = ret; 1555 ret = 0; 1556 } 1557 break; 1558 1559 case SIOCSMIIREG: 1560 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num, 1561 mii->val_in); 1562 break; 1563 1564 default: 1565 ret = -EOPNOTSUPP; 1566 break; 1567 } 1568 } 1569 1570 return ret; 1571 } 1572 EXPORT_SYMBOL_GPL(phylink_mii_ioctl); 1573 1574 static int phylink_sfp_module_insert(void *upstream, 1575 const struct sfp_eeprom_id *id) 1576 { 1577 struct phylink *pl = upstream; 1578 __ETHTOOL_DECLARE_LINK_MODE_MASK(support) = { 0, }; 1579 struct phylink_link_state config; 1580 phy_interface_t iface; 1581 int ret = 0; 1582 bool changed; 1583 u8 port; 1584 1585 ASSERT_RTNL(); 1586 1587 sfp_parse_support(pl->sfp_bus, id, support); 1588 port = sfp_parse_port(pl->sfp_bus, id, support); 1589 1590 memset(&config, 0, sizeof(config)); 1591 linkmode_copy(config.advertising, support); 1592 config.interface = PHY_INTERFACE_MODE_NA; 1593 config.speed = SPEED_UNKNOWN; 1594 config.duplex = DUPLEX_UNKNOWN; 1595 config.pause = MLO_PAUSE_AN; 1596 config.an_enabled = pl->link_config.an_enabled; 1597 1598 /* Ignore errors if we're expecting a PHY to attach later */ 1599 ret = phylink_validate(pl, support, &config); 1600 if (ret) { 1601 netdev_err(pl->netdev, "validation with support %*pb failed: %d\n", 1602 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret); 1603 return ret; 1604 } 1605 1606 iface = sfp_select_interface(pl->sfp_bus, id, config.advertising); 1607 if (iface == PHY_INTERFACE_MODE_NA) { 1608 netdev_err(pl->netdev, 1609 "selection of interface failed, advertisement %*pb\n", 1610 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising); 1611 return -EINVAL; 1612 } 1613 1614 config.interface = iface; 1615 ret = phylink_validate(pl, support, &config); 1616 if (ret) { 1617 netdev_err(pl->netdev, "validation of %s/%s with support %*pb failed: %d\n", 1618 phylink_an_mode_str(MLO_AN_INBAND), 1619 phy_modes(config.interface), 1620 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret); 1621 return ret; 1622 } 1623 1624 netdev_dbg(pl->netdev, "requesting link mode %s/%s with support %*pb\n", 1625 phylink_an_mode_str(MLO_AN_INBAND), 1626 phy_modes(config.interface), 1627 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 1628 1629 if (phy_interface_mode_is_8023z(iface) && pl->phydev) 1630 return -EINVAL; 1631 1632 changed = !bitmap_equal(pl->supported, support, 1633 __ETHTOOL_LINK_MODE_MASK_NBITS); 1634 if (changed) { 1635 linkmode_copy(pl->supported, support); 1636 linkmode_copy(pl->link_config.advertising, config.advertising); 1637 } 1638 1639 if (pl->link_an_mode != MLO_AN_INBAND || 1640 pl->link_config.interface != config.interface) { 1641 pl->link_config.interface = config.interface; 1642 pl->link_an_mode = MLO_AN_INBAND; 1643 1644 changed = true; 1645 1646 netdev_info(pl->netdev, "switched to %s/%s link mode\n", 1647 phylink_an_mode_str(MLO_AN_INBAND), 1648 phy_modes(config.interface)); 1649 } 1650 1651 pl->link_port = port; 1652 1653 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED, 1654 &pl->phylink_disable_state)) 1655 phylink_mac_config(pl, &pl->link_config); 1656 1657 return ret; 1658 } 1659 1660 static void phylink_sfp_link_down(void *upstream) 1661 { 1662 struct phylink *pl = upstream; 1663 1664 ASSERT_RTNL(); 1665 1666 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_LINK); 1667 } 1668 1669 static void phylink_sfp_link_up(void *upstream) 1670 { 1671 struct phylink *pl = upstream; 1672 1673 ASSERT_RTNL(); 1674 1675 clear_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state); 1676 phylink_run_resolve(pl); 1677 } 1678 1679 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy) 1680 { 1681 struct phylink *pl = upstream; 1682 1683 return __phylink_connect_phy(upstream, phy, pl->link_config.interface); 1684 } 1685 1686 static void phylink_sfp_disconnect_phy(void *upstream) 1687 { 1688 phylink_disconnect_phy(upstream); 1689 } 1690 1691 static const struct sfp_upstream_ops sfp_phylink_ops = { 1692 .module_insert = phylink_sfp_module_insert, 1693 .link_up = phylink_sfp_link_up, 1694 .link_down = phylink_sfp_link_down, 1695 .connect_phy = phylink_sfp_connect_phy, 1696 .disconnect_phy = phylink_sfp_disconnect_phy, 1697 }; 1698 1699 /* Helpers for MAC drivers */ 1700 1701 /** 1702 * phylink_helper_basex_speed() - 1000BaseX/2500BaseX helper 1703 * @state: a pointer to a &struct phylink_link_state 1704 * 1705 * Inspect the interface mode, advertising mask or forced speed and 1706 * decide whether to run at 2.5Gbit or 1Gbit appropriately, switching 1707 * the interface mode to suit. @state->interface is appropriately 1708 * updated, and the advertising mask has the "other" baseX_Full flag 1709 * cleared. 1710 */ 1711 void phylink_helper_basex_speed(struct phylink_link_state *state) 1712 { 1713 if (phy_interface_mode_is_8023z(state->interface)) { 1714 bool want_2500 = state->an_enabled ? 1715 phylink_test(state->advertising, 2500baseX_Full) : 1716 state->speed == SPEED_2500; 1717 1718 if (want_2500) { 1719 phylink_clear(state->advertising, 1000baseX_Full); 1720 state->interface = PHY_INTERFACE_MODE_2500BASEX; 1721 } else { 1722 phylink_clear(state->advertising, 2500baseX_Full); 1723 state->interface = PHY_INTERFACE_MODE_1000BASEX; 1724 } 1725 } 1726 } 1727 EXPORT_SYMBOL_GPL(phylink_helper_basex_speed); 1728 1729 MODULE_LICENSE("GPL v2"); 1730