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