1 /* 2 * phylink models the MAC to optional PHY connection, supporting 3 * technologies such as SFP cages where the PHY is hot-pluggable. 4 * 5 * Copyright (C) 2015 Russell King 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 #include <linux/ethtool.h> 12 #include <linux/export.h> 13 #include <linux/gpio/consumer.h> 14 #include <linux/netdevice.h> 15 #include <linux/of.h> 16 #include <linux/of_mdio.h> 17 #include <linux/phy.h> 18 #include <linux/phy_fixed.h> 19 #include <linux/phylink.h> 20 #include <linux/rtnetlink.h> 21 #include <linux/spinlock.h> 22 #include <linux/timer.h> 23 #include <linux/workqueue.h> 24 25 #include "sfp.h" 26 #include "swphy.h" 27 28 #define SUPPORTED_INTERFACES \ 29 (SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE | \ 30 SUPPORTED_BNC | SUPPORTED_AUI | SUPPORTED_Backplane) 31 #define ADVERTISED_INTERFACES \ 32 (ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \ 33 ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane) 34 35 enum { 36 PHYLINK_DISABLE_STOPPED, 37 PHYLINK_DISABLE_LINK, 38 }; 39 40 /** 41 * struct phylink - internal data type for phylink 42 */ 43 struct phylink { 44 /* private: */ 45 struct net_device *netdev; 46 const struct phylink_mac_ops *ops; 47 48 unsigned long phylink_disable_state; /* bitmask of disables */ 49 struct phy_device *phydev; 50 phy_interface_t link_interface; /* PHY_INTERFACE_xxx */ 51 u8 link_an_mode; /* MLO_AN_xxx */ 52 u8 link_port; /* The current non-phy ethtool port */ 53 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 54 55 /* The link configuration settings */ 56 struct phylink_link_state link_config; 57 struct gpio_desc *link_gpio; 58 struct timer_list link_poll; 59 void (*get_fixed_state)(struct net_device *dev, 60 struct phylink_link_state *s); 61 62 struct mutex state_mutex; 63 struct phylink_link_state phy_state; 64 struct work_struct resolve; 65 66 bool mac_link_dropped; 67 68 struct sfp_bus *sfp_bus; 69 }; 70 71 /** 72 * phylink_set_port_modes() - set the port type modes in the ethtool mask 73 * @mask: ethtool link mode mask 74 * 75 * Sets all the port type modes in the ethtool mask. MAC drivers should 76 * use this in their 'validate' callback. 77 */ 78 void phylink_set_port_modes(unsigned long *mask) 79 { 80 phylink_set(mask, TP); 81 phylink_set(mask, AUI); 82 phylink_set(mask, MII); 83 phylink_set(mask, FIBRE); 84 phylink_set(mask, BNC); 85 phylink_set(mask, Backplane); 86 } 87 EXPORT_SYMBOL_GPL(phylink_set_port_modes); 88 89 static int phylink_is_empty_linkmode(const unsigned long *linkmode) 90 { 91 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, }; 92 93 phylink_set_port_modes(tmp); 94 phylink_set(tmp, Autoneg); 95 phylink_set(tmp, Pause); 96 phylink_set(tmp, Asym_Pause); 97 98 bitmap_andnot(tmp, linkmode, tmp, __ETHTOOL_LINK_MODE_MASK_NBITS); 99 100 return linkmode_empty(tmp); 101 } 102 103 static const char *phylink_an_mode_str(unsigned int mode) 104 { 105 static const char *modestr[] = { 106 [MLO_AN_PHY] = "phy", 107 [MLO_AN_FIXED] = "fixed", 108 [MLO_AN_INBAND] = "inband", 109 }; 110 111 return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown"; 112 } 113 114 static int phylink_validate(struct phylink *pl, unsigned long *supported, 115 struct phylink_link_state *state) 116 { 117 pl->ops->validate(pl->netdev, supported, state); 118 119 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; 120 } 121 122 static int phylink_parse_fixedlink(struct phylink *pl, 123 struct fwnode_handle *fwnode) 124 { 125 struct fwnode_handle *fixed_node; 126 const struct phy_setting *s; 127 struct gpio_desc *desc; 128 u32 speed; 129 int ret; 130 131 fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link"); 132 if (fixed_node) { 133 ret = fwnode_property_read_u32(fixed_node, "speed", &speed); 134 135 pl->link_config.speed = speed; 136 pl->link_config.duplex = DUPLEX_HALF; 137 138 if (fwnode_property_read_bool(fixed_node, "full-duplex")) 139 pl->link_config.duplex = DUPLEX_FULL; 140 141 /* We treat the "pause" and "asym-pause" terminology as 142 * defining the link partner's ability. */ 143 if (fwnode_property_read_bool(fixed_node, "pause")) 144 pl->link_config.pause |= MLO_PAUSE_SYM; 145 if (fwnode_property_read_bool(fixed_node, "asym-pause")) 146 pl->link_config.pause |= MLO_PAUSE_ASYM; 147 148 if (ret == 0) { 149 desc = fwnode_get_named_gpiod(fixed_node, "link-gpios", 150 0, GPIOD_IN, "?"); 151 152 if (!IS_ERR(desc)) 153 pl->link_gpio = desc; 154 else if (desc == ERR_PTR(-EPROBE_DEFER)) 155 ret = -EPROBE_DEFER; 156 } 157 fwnode_handle_put(fixed_node); 158 159 if (ret) 160 return ret; 161 } else { 162 u32 prop[5]; 163 164 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 165 NULL, 0); 166 if (ret != ARRAY_SIZE(prop)) { 167 netdev_err(pl->netdev, "broken fixed-link?\n"); 168 return -EINVAL; 169 } 170 171 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 172 prop, ARRAY_SIZE(prop)); 173 if (!ret) { 174 pl->link_config.duplex = prop[1] ? 175 DUPLEX_FULL : DUPLEX_HALF; 176 pl->link_config.speed = prop[2]; 177 if (prop[3]) 178 pl->link_config.pause |= MLO_PAUSE_SYM; 179 if (prop[4]) 180 pl->link_config.pause |= MLO_PAUSE_ASYM; 181 } 182 } 183 184 if (pl->link_config.speed > SPEED_1000 && 185 pl->link_config.duplex != DUPLEX_FULL) 186 netdev_warn(pl->netdev, "fixed link specifies half duplex for %dMbps link?\n", 187 pl->link_config.speed); 188 189 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 190 linkmode_copy(pl->link_config.advertising, pl->supported); 191 phylink_validate(pl, pl->supported, &pl->link_config); 192 193 s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex, 194 pl->supported, 195 __ETHTOOL_LINK_MODE_MASK_NBITS, 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_an_restart(struct phylink *pl) 310 { 311 if (pl->link_config.an_enabled && 312 phy_interface_mode_is_8023z(pl->link_config.interface)) 313 pl->ops->mac_an_restart(pl->netdev); 314 } 315 316 static int phylink_get_mac_state(struct phylink *pl, struct phylink_link_state *state) 317 { 318 struct net_device *ndev = pl->netdev; 319 320 linkmode_copy(state->advertising, pl->link_config.advertising); 321 linkmode_zero(state->lp_advertising); 322 state->interface = pl->link_config.interface; 323 state->an_enabled = pl->link_config.an_enabled; 324 state->link = 1; 325 326 return pl->ops->mac_link_state(ndev, state); 327 } 328 329 /* The fixed state is... fixed except for the link state, 330 * which may be determined by a GPIO or a callback. 331 */ 332 static void phylink_get_fixed_state(struct phylink *pl, struct phylink_link_state *state) 333 { 334 *state = pl->link_config; 335 if (pl->get_fixed_state) 336 pl->get_fixed_state(pl->netdev, state); 337 else if (pl->link_gpio) 338 state->link = !!gpiod_get_value_cansleep(pl->link_gpio); 339 } 340 341 /* Flow control is resolved according to our and the link partners 342 * advertisements using the following drawn from the 802.3 specs: 343 * Local device Link partner 344 * Pause AsymDir Pause AsymDir Result 345 * 1 X 1 X TX+RX 346 * 0 1 1 1 RX 347 * 1 1 0 1 TX 348 */ 349 static void phylink_resolve_flow(struct phylink *pl, 350 struct phylink_link_state *state) 351 { 352 int new_pause = 0; 353 354 if (pl->link_config.pause & MLO_PAUSE_AN) { 355 int pause = 0; 356 357 if (phylink_test(pl->link_config.advertising, Pause)) 358 pause |= MLO_PAUSE_SYM; 359 if (phylink_test(pl->link_config.advertising, Asym_Pause)) 360 pause |= MLO_PAUSE_ASYM; 361 362 pause &= state->pause; 363 364 if (pause & MLO_PAUSE_SYM) 365 new_pause = MLO_PAUSE_TX | MLO_PAUSE_RX; 366 else if (pause & MLO_PAUSE_ASYM) 367 new_pause = state->pause & MLO_PAUSE_SYM ? 368 MLO_PAUSE_RX : MLO_PAUSE_TX; 369 } else { 370 new_pause = pl->link_config.pause & MLO_PAUSE_TXRX_MASK; 371 } 372 373 state->pause &= ~MLO_PAUSE_TXRX_MASK; 374 state->pause |= new_pause; 375 } 376 377 static const char *phylink_pause_to_str(int pause) 378 { 379 switch (pause & MLO_PAUSE_TXRX_MASK) { 380 case MLO_PAUSE_TX | MLO_PAUSE_RX: 381 return "rx/tx"; 382 case MLO_PAUSE_TX: 383 return "tx"; 384 case MLO_PAUSE_RX: 385 return "rx"; 386 default: 387 return "off"; 388 } 389 } 390 391 static void phylink_resolve(struct work_struct *w) 392 { 393 struct phylink *pl = container_of(w, struct phylink, resolve); 394 struct phylink_link_state link_state; 395 struct net_device *ndev = pl->netdev; 396 397 mutex_lock(&pl->state_mutex); 398 if (pl->phylink_disable_state) { 399 pl->mac_link_dropped = false; 400 link_state.link = false; 401 } else if (pl->mac_link_dropped) { 402 link_state.link = false; 403 } else { 404 switch (pl->link_an_mode) { 405 case MLO_AN_PHY: 406 link_state = pl->phy_state; 407 phylink_resolve_flow(pl, &link_state); 408 phylink_mac_config(pl, &link_state); 409 break; 410 411 case MLO_AN_FIXED: 412 phylink_get_fixed_state(pl, &link_state); 413 phylink_mac_config(pl, &link_state); 414 break; 415 416 case MLO_AN_INBAND: 417 phylink_get_mac_state(pl, &link_state); 418 if (pl->phydev) { 419 bool changed = false; 420 421 link_state.link = link_state.link && 422 pl->phy_state.link; 423 424 if (pl->phy_state.interface != 425 link_state.interface) { 426 link_state.interface = pl->phy_state.interface; 427 changed = true; 428 } 429 430 /* Propagate the flow control from the PHY 431 * to the MAC. Also propagate the interface 432 * if changed. 433 */ 434 if (pl->phy_state.link || changed) { 435 link_state.pause |= pl->phy_state.pause; 436 phylink_resolve_flow(pl, &link_state); 437 438 phylink_mac_config(pl, &link_state); 439 } 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_fixed_poll(struct timer_list *t) 479 { 480 struct phylink *pl = container_of(t, struct phylink, link_poll); 481 482 mod_timer(t, jiffies + HZ); 483 484 phylink_run_resolve(pl); 485 } 486 487 static const struct sfp_upstream_ops sfp_phylink_ops; 488 489 static int phylink_register_sfp(struct phylink *pl, 490 struct fwnode_handle *fwnode) 491 { 492 struct fwnode_reference_args ref; 493 int ret; 494 495 if (!fwnode) 496 return 0; 497 498 ret = fwnode_property_get_reference_args(fwnode, "sfp", NULL, 499 0, 0, &ref); 500 if (ret < 0) { 501 if (ret == -ENOENT) 502 return 0; 503 504 netdev_err(pl->netdev, "unable to parse \"sfp\" node: %d\n", 505 ret); 506 return ret; 507 } 508 509 pl->sfp_bus = sfp_register_upstream(ref.fwnode, pl->netdev, pl, 510 &sfp_phylink_ops); 511 if (!pl->sfp_bus) 512 return -ENOMEM; 513 514 return 0; 515 } 516 517 /** 518 * phylink_create() - create a phylink instance 519 * @ndev: a pointer to the &struct net_device 520 * @fwnode: a pointer to a &struct fwnode_handle describing the network 521 * interface 522 * @iface: the desired link mode defined by &typedef phy_interface_t 523 * @ops: a pointer to a &struct phylink_mac_ops for the MAC. 524 * 525 * Create a new phylink instance, and parse the link parameters found in @np. 526 * This will parse in-band modes, fixed-link or SFP configuration. 527 * 528 * Returns a pointer to a &struct phylink, or an error-pointer value. Users 529 * must use IS_ERR() to check for errors from this function. 530 */ 531 struct phylink *phylink_create(struct net_device *ndev, 532 struct fwnode_handle *fwnode, 533 phy_interface_t iface, 534 const struct phylink_mac_ops *ops) 535 { 536 struct phylink *pl; 537 int ret; 538 539 pl = kzalloc(sizeof(*pl), GFP_KERNEL); 540 if (!pl) 541 return ERR_PTR(-ENOMEM); 542 543 mutex_init(&pl->state_mutex); 544 INIT_WORK(&pl->resolve, phylink_resolve); 545 pl->netdev = ndev; 546 pl->phy_state.interface = iface; 547 pl->link_interface = iface; 548 if (iface == PHY_INTERFACE_MODE_MOCA) 549 pl->link_port = PORT_BNC; 550 else 551 pl->link_port = PORT_MII; 552 pl->link_config.interface = iface; 553 pl->link_config.pause = MLO_PAUSE_AN; 554 pl->link_config.speed = SPEED_UNKNOWN; 555 pl->link_config.duplex = DUPLEX_UNKNOWN; 556 pl->link_config.an_enabled = true; 557 pl->ops = ops; 558 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 559 timer_setup(&pl->link_poll, phylink_fixed_poll, 0); 560 561 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 562 linkmode_copy(pl->link_config.advertising, pl->supported); 563 phylink_validate(pl, pl->supported, &pl->link_config); 564 565 ret = phylink_parse_mode(pl, fwnode); 566 if (ret < 0) { 567 kfree(pl); 568 return ERR_PTR(ret); 569 } 570 571 if (pl->link_an_mode == MLO_AN_FIXED) { 572 ret = phylink_parse_fixedlink(pl, fwnode); 573 if (ret < 0) { 574 kfree(pl); 575 return ERR_PTR(ret); 576 } 577 } 578 579 ret = phylink_register_sfp(pl, fwnode); 580 if (ret < 0) { 581 kfree(pl); 582 return ERR_PTR(ret); 583 } 584 585 return pl; 586 } 587 EXPORT_SYMBOL_GPL(phylink_create); 588 589 /** 590 * phylink_destroy() - cleanup and destroy the phylink instance 591 * @pl: a pointer to a &struct phylink returned from phylink_create() 592 * 593 * Destroy a phylink instance. Any PHY that has been attached must have been 594 * cleaned up via phylink_disconnect_phy() prior to calling this function. 595 */ 596 void phylink_destroy(struct phylink *pl) 597 { 598 if (pl->sfp_bus) 599 sfp_unregister_upstream(pl->sfp_bus); 600 if (!IS_ERR_OR_NULL(pl->link_gpio)) 601 gpiod_put(pl->link_gpio); 602 603 cancel_work_sync(&pl->resolve); 604 kfree(pl); 605 } 606 EXPORT_SYMBOL_GPL(phylink_destroy); 607 608 static void phylink_phy_change(struct phy_device *phydev, bool up, 609 bool do_carrier) 610 { 611 struct phylink *pl = phydev->phylink; 612 613 mutex_lock(&pl->state_mutex); 614 pl->phy_state.speed = phydev->speed; 615 pl->phy_state.duplex = phydev->duplex; 616 pl->phy_state.pause = MLO_PAUSE_NONE; 617 if (phydev->pause) 618 pl->phy_state.pause |= MLO_PAUSE_SYM; 619 if (phydev->asym_pause) 620 pl->phy_state.pause |= MLO_PAUSE_ASYM; 621 pl->phy_state.interface = phydev->interface; 622 pl->phy_state.link = up; 623 mutex_unlock(&pl->state_mutex); 624 625 phylink_run_resolve(pl); 626 627 netdev_dbg(pl->netdev, "phy link %s %s/%s/%s\n", up ? "up" : "down", 628 phy_modes(phydev->interface), 629 phy_speed_to_str(phydev->speed), 630 phy_duplex_to_str(phydev->duplex)); 631 } 632 633 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy) 634 { 635 struct phylink_link_state config; 636 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 637 u32 advertising; 638 int ret; 639 640 memset(&config, 0, sizeof(config)); 641 ethtool_convert_legacy_u32_to_link_mode(supported, phy->supported); 642 ethtool_convert_legacy_u32_to_link_mode(config.advertising, 643 phy->advertising); 644 config.interface = pl->link_config.interface; 645 646 /* 647 * This is the new way of dealing with flow control for PHYs, 648 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 649 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 650 * using our validate call to the MAC, we rely upon the MAC 651 * clearing the bits from both supported and advertising fields. 652 */ 653 if (phylink_test(supported, Pause)) 654 phylink_set(config.advertising, Pause); 655 if (phylink_test(supported, Asym_Pause)) 656 phylink_set(config.advertising, Asym_Pause); 657 658 ret = phylink_validate(pl, supported, &config); 659 if (ret) 660 return ret; 661 662 phy->phylink = pl; 663 phy->phy_link_change = phylink_phy_change; 664 665 netdev_info(pl->netdev, 666 "PHY [%s] driver [%s]\n", dev_name(&phy->mdio.dev), 667 phy->drv->name); 668 669 mutex_lock(&phy->lock); 670 mutex_lock(&pl->state_mutex); 671 pl->phydev = phy; 672 linkmode_copy(pl->supported, supported); 673 linkmode_copy(pl->link_config.advertising, config.advertising); 674 675 /* Restrict the phy advertisement according to the MAC support. */ 676 ethtool_convert_link_mode_to_legacy_u32(&advertising, config.advertising); 677 phy->advertising = advertising; 678 mutex_unlock(&pl->state_mutex); 679 mutex_unlock(&phy->lock); 680 681 netdev_dbg(pl->netdev, 682 "phy: setting supported %*pb advertising 0x%08x\n", 683 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported, 684 phy->advertising); 685 686 phy_start_machine(phy); 687 if (phy->irq > 0) 688 phy_start_interrupts(phy); 689 690 return 0; 691 } 692 693 /** 694 * phylink_connect_phy() - connect a PHY to the phylink instance 695 * @pl: a pointer to a &struct phylink returned from phylink_create() 696 * @phy: a pointer to a &struct phy_device. 697 * 698 * Connect @phy to the phylink instance specified by @pl by calling 699 * phy_attach_direct(). Configure the @phy according to the MAC driver's 700 * capabilities, start the PHYLIB state machine and enable any interrupts 701 * that the PHY supports. 702 * 703 * This updates the phylink's ethtool supported and advertising link mode 704 * masks. 705 * 706 * Returns 0 on success or a negative errno. 707 */ 708 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy) 709 { 710 int ret; 711 712 if (WARN_ON(pl->link_an_mode == MLO_AN_FIXED || 713 (pl->link_an_mode == MLO_AN_INBAND && 714 phy_interface_mode_is_8023z(pl->link_interface)))) 715 return -EINVAL; 716 717 if (pl->phydev) 718 return -EBUSY; 719 720 /* Use PHY device/driver interface */ 721 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 722 pl->link_interface = phy->interface; 723 pl->link_config.interface = pl->link_interface; 724 } 725 726 ret = phy_attach_direct(pl->netdev, phy, 0, pl->link_interface); 727 if (ret) 728 return ret; 729 730 ret = phylink_bringup_phy(pl, phy); 731 if (ret) 732 phy_detach(phy); 733 734 return ret; 735 } 736 EXPORT_SYMBOL_GPL(phylink_connect_phy); 737 738 /** 739 * phylink_of_phy_connect() - connect the PHY specified in the DT mode. 740 * @pl: a pointer to a &struct phylink returned from phylink_create() 741 * @dn: a pointer to a &struct device_node. 742 * @flags: PHY-specific flags to communicate to the PHY device driver 743 * 744 * Connect the phy specified in the device node @dn to the phylink instance 745 * specified by @pl. Actions specified in phylink_connect_phy() will be 746 * performed. 747 * 748 * Returns 0 on success or a negative errno. 749 */ 750 int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn, 751 u32 flags) 752 { 753 struct device_node *phy_node; 754 struct phy_device *phy_dev; 755 int ret; 756 757 /* Fixed links and 802.3z are handled without needing a PHY */ 758 if (pl->link_an_mode == MLO_AN_FIXED || 759 (pl->link_an_mode == MLO_AN_INBAND && 760 phy_interface_mode_is_8023z(pl->link_interface))) 761 return 0; 762 763 phy_node = of_parse_phandle(dn, "phy-handle", 0); 764 if (!phy_node) 765 phy_node = of_parse_phandle(dn, "phy", 0); 766 if (!phy_node) 767 phy_node = of_parse_phandle(dn, "phy-device", 0); 768 769 if (!phy_node) { 770 if (pl->link_an_mode == MLO_AN_PHY) 771 return -ENODEV; 772 return 0; 773 } 774 775 phy_dev = of_phy_attach(pl->netdev, phy_node, flags, 776 pl->link_interface); 777 /* We're done with the phy_node handle */ 778 of_node_put(phy_node); 779 780 if (!phy_dev) 781 return -ENODEV; 782 783 ret = phylink_bringup_phy(pl, phy_dev); 784 if (ret) 785 phy_detach(phy_dev); 786 787 return ret; 788 } 789 EXPORT_SYMBOL_GPL(phylink_of_phy_connect); 790 791 /** 792 * phylink_disconnect_phy() - disconnect any PHY attached to the phylink 793 * instance. 794 * @pl: a pointer to a &struct phylink returned from phylink_create() 795 * 796 * Disconnect any current PHY from the phylink instance described by @pl. 797 */ 798 void phylink_disconnect_phy(struct phylink *pl) 799 { 800 struct phy_device *phy; 801 802 ASSERT_RTNL(); 803 804 phy = pl->phydev; 805 if (phy) { 806 mutex_lock(&phy->lock); 807 mutex_lock(&pl->state_mutex); 808 pl->phydev = NULL; 809 mutex_unlock(&pl->state_mutex); 810 mutex_unlock(&phy->lock); 811 flush_work(&pl->resolve); 812 813 phy_disconnect(phy); 814 } 815 } 816 EXPORT_SYMBOL_GPL(phylink_disconnect_phy); 817 818 /** 819 * phylink_fixed_state_cb() - allow setting a fixed link callback 820 * @pl: a pointer to a &struct phylink returned from phylink_create() 821 * @cb: callback to execute to determine the fixed link state. 822 * 823 * The MAC driver should call this driver when the state of its link 824 * can be determined through e.g: an out of band MMIO register. 825 */ 826 int phylink_fixed_state_cb(struct phylink *pl, 827 void (*cb)(struct net_device *dev, 828 struct phylink_link_state *state)) 829 { 830 /* It does not make sense to let the link be overriden unless we use 831 * MLO_AN_FIXED 832 */ 833 if (pl->link_an_mode != MLO_AN_FIXED) 834 return -EINVAL; 835 836 mutex_lock(&pl->state_mutex); 837 pl->get_fixed_state = cb; 838 mutex_unlock(&pl->state_mutex); 839 840 return 0; 841 } 842 EXPORT_SYMBOL_GPL(phylink_fixed_state_cb); 843 844 /** 845 * phylink_mac_change() - notify phylink of a change in MAC state 846 * @pl: a pointer to a &struct phylink returned from phylink_create() 847 * @up: indicates whether the link is currently up. 848 * 849 * The MAC driver should call this driver when the state of its link 850 * changes (eg, link failure, new negotiation results, etc.) 851 */ 852 void phylink_mac_change(struct phylink *pl, bool up) 853 { 854 if (!up) 855 pl->mac_link_dropped = true; 856 phylink_run_resolve(pl); 857 netdev_dbg(pl->netdev, "mac link %s\n", up ? "up" : "down"); 858 } 859 EXPORT_SYMBOL_GPL(phylink_mac_change); 860 861 /** 862 * phylink_start() - start a phylink instance 863 * @pl: a pointer to a &struct phylink returned from phylink_create() 864 * 865 * Start the phylink instance specified by @pl, configuring the MAC for the 866 * desired link mode(s) and negotiation style. This should be called from the 867 * network device driver's &struct net_device_ops ndo_open() method. 868 */ 869 void phylink_start(struct phylink *pl) 870 { 871 ASSERT_RTNL(); 872 873 netdev_info(pl->netdev, "configuring for %s/%s link mode\n", 874 phylink_an_mode_str(pl->link_an_mode), 875 phy_modes(pl->link_config.interface)); 876 877 /* Always set the carrier off */ 878 netif_carrier_off(pl->netdev); 879 880 /* Apply the link configuration to the MAC when starting. This allows 881 * a fixed-link to start with the correct parameters, and also 882 * ensures that we set the appropriate advertisement for Serdes links. 883 */ 884 phylink_resolve_flow(pl, &pl->link_config); 885 phylink_mac_config(pl, &pl->link_config); 886 887 /* Restart autonegotiation if using 802.3z to ensure that the link 888 * parameters are properly negotiated. This is necessary for DSA 889 * switches using 802.3z negotiation to ensure they see our modes. 890 */ 891 phylink_mac_an_restart(pl); 892 893 clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 894 phylink_run_resolve(pl); 895 896 if (pl->link_an_mode == MLO_AN_FIXED && !IS_ERR(pl->link_gpio)) 897 mod_timer(&pl->link_poll, jiffies + HZ); 898 if (pl->sfp_bus) 899 sfp_upstream_start(pl->sfp_bus); 900 if (pl->phydev) 901 phy_start(pl->phydev); 902 } 903 EXPORT_SYMBOL_GPL(phylink_start); 904 905 /** 906 * phylink_stop() - stop a phylink instance 907 * @pl: a pointer to a &struct phylink returned from phylink_create() 908 * 909 * Stop the phylink instance specified by @pl. This should be called from the 910 * network device driver's &struct net_device_ops ndo_stop() method. The 911 * network device's carrier state should not be changed prior to calling this 912 * function. 913 */ 914 void phylink_stop(struct phylink *pl) 915 { 916 ASSERT_RTNL(); 917 918 if (pl->phydev) 919 phy_stop(pl->phydev); 920 if (pl->sfp_bus) 921 sfp_upstream_stop(pl->sfp_bus); 922 if (pl->link_an_mode == MLO_AN_FIXED && !IS_ERR(pl->link_gpio)) 923 del_timer_sync(&pl->link_poll); 924 925 set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 926 queue_work(system_power_efficient_wq, &pl->resolve); 927 flush_work(&pl->resolve); 928 } 929 EXPORT_SYMBOL_GPL(phylink_stop); 930 931 /** 932 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY 933 * @pl: a pointer to a &struct phylink returned from phylink_create() 934 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters 935 * 936 * Read the wake on lan parameters from the PHY attached to the phylink 937 * instance specified by @pl. If no PHY is currently attached, report no 938 * support for wake on lan. 939 */ 940 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 941 { 942 ASSERT_RTNL(); 943 944 wol->supported = 0; 945 wol->wolopts = 0; 946 947 if (pl->phydev) 948 phy_ethtool_get_wol(pl->phydev, wol); 949 } 950 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol); 951 952 /** 953 * phylink_ethtool_set_wol() - set wake on lan parameters 954 * @pl: a pointer to a &struct phylink returned from phylink_create() 955 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters 956 * 957 * Set the wake on lan parameters for the PHY attached to the phylink 958 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP 959 * error. 960 * 961 * Returns zero on success or negative errno code. 962 */ 963 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 964 { 965 int ret = -EOPNOTSUPP; 966 967 ASSERT_RTNL(); 968 969 if (pl->phydev) 970 ret = phy_ethtool_set_wol(pl->phydev, wol); 971 972 return ret; 973 } 974 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol); 975 976 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b) 977 { 978 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask); 979 980 linkmode_zero(mask); 981 phylink_set_port_modes(mask); 982 983 linkmode_and(dst, dst, mask); 984 linkmode_or(dst, dst, b); 985 } 986 987 static void phylink_get_ksettings(const struct phylink_link_state *state, 988 struct ethtool_link_ksettings *kset) 989 { 990 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising); 991 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising); 992 kset->base.speed = state->speed; 993 kset->base.duplex = state->duplex; 994 kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE : 995 AUTONEG_DISABLE; 996 } 997 998 /** 999 * phylink_ethtool_ksettings_get() - get the current link settings 1000 * @pl: a pointer to a &struct phylink returned from phylink_create() 1001 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings 1002 * 1003 * Read the current link settings for the phylink instance specified by @pl. 1004 * This will be the link settings read from the MAC, PHY or fixed link 1005 * settings depending on the current negotiation mode. 1006 */ 1007 int phylink_ethtool_ksettings_get(struct phylink *pl, 1008 struct ethtool_link_ksettings *kset) 1009 { 1010 struct phylink_link_state link_state; 1011 1012 ASSERT_RTNL(); 1013 1014 if (pl->phydev) { 1015 phy_ethtool_ksettings_get(pl->phydev, kset); 1016 } else { 1017 kset->base.port = pl->link_port; 1018 } 1019 1020 linkmode_copy(kset->link_modes.supported, pl->supported); 1021 1022 switch (pl->link_an_mode) { 1023 case MLO_AN_FIXED: 1024 /* We are using fixed settings. Report these as the 1025 * current link settings - and note that these also 1026 * represent the supported speeds/duplex/pause modes. 1027 */ 1028 phylink_get_fixed_state(pl, &link_state); 1029 phylink_get_ksettings(&link_state, kset); 1030 break; 1031 1032 case MLO_AN_INBAND: 1033 /* If there is a phy attached, then use the reported 1034 * settings from the phy with no modification. 1035 */ 1036 if (pl->phydev) 1037 break; 1038 1039 phylink_get_mac_state(pl, &link_state); 1040 1041 /* The MAC is reporting the link results from its own PCS 1042 * layer via in-band status. Report these as the current 1043 * link settings. 1044 */ 1045 phylink_get_ksettings(&link_state, kset); 1046 break; 1047 } 1048 1049 return 0; 1050 } 1051 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get); 1052 1053 /** 1054 * phylink_ethtool_ksettings_set() - set the link settings 1055 * @pl: a pointer to a &struct phylink returned from phylink_create() 1056 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes 1057 */ 1058 int phylink_ethtool_ksettings_set(struct phylink *pl, 1059 const struct ethtool_link_ksettings *kset) 1060 { 1061 struct ethtool_link_ksettings our_kset; 1062 struct phylink_link_state config; 1063 int ret; 1064 1065 ASSERT_RTNL(); 1066 1067 if (kset->base.autoneg != AUTONEG_DISABLE && 1068 kset->base.autoneg != AUTONEG_ENABLE) 1069 return -EINVAL; 1070 1071 config = pl->link_config; 1072 1073 /* Mask out unsupported advertisements */ 1074 linkmode_and(config.advertising, kset->link_modes.advertising, 1075 pl->supported); 1076 1077 /* FIXME: should we reject autoneg if phy/mac does not support it? */ 1078 if (kset->base.autoneg == AUTONEG_DISABLE) { 1079 const struct phy_setting *s; 1080 1081 /* Autonegotiation disabled, select a suitable speed and 1082 * duplex. 1083 */ 1084 s = phy_lookup_setting(kset->base.speed, kset->base.duplex, 1085 pl->supported, 1086 __ETHTOOL_LINK_MODE_MASK_NBITS, false); 1087 if (!s) 1088 return -EINVAL; 1089 1090 /* If we have a fixed link (as specified by firmware), refuse 1091 * to change link parameters. 1092 */ 1093 if (pl->link_an_mode == MLO_AN_FIXED && 1094 (s->speed != pl->link_config.speed || 1095 s->duplex != pl->link_config.duplex)) 1096 return -EINVAL; 1097 1098 config.speed = s->speed; 1099 config.duplex = s->duplex; 1100 config.an_enabled = false; 1101 1102 __clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising); 1103 } else { 1104 /* If we have a fixed link, refuse to enable autonegotiation */ 1105 if (pl->link_an_mode == MLO_AN_FIXED) 1106 return -EINVAL; 1107 1108 config.speed = SPEED_UNKNOWN; 1109 config.duplex = DUPLEX_UNKNOWN; 1110 config.an_enabled = true; 1111 1112 __set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising); 1113 } 1114 1115 if (phylink_validate(pl, pl->supported, &config)) 1116 return -EINVAL; 1117 1118 /* If autonegotiation is enabled, we must have an advertisement */ 1119 if (config.an_enabled && phylink_is_empty_linkmode(config.advertising)) 1120 return -EINVAL; 1121 1122 our_kset = *kset; 1123 linkmode_copy(our_kset.link_modes.advertising, config.advertising); 1124 our_kset.base.speed = config.speed; 1125 our_kset.base.duplex = config.duplex; 1126 1127 /* If we have a PHY, configure the phy */ 1128 if (pl->phydev) { 1129 ret = phy_ethtool_ksettings_set(pl->phydev, &our_kset); 1130 if (ret) 1131 return ret; 1132 } 1133 1134 mutex_lock(&pl->state_mutex); 1135 /* Configure the MAC to match the new settings */ 1136 linkmode_copy(pl->link_config.advertising, our_kset.link_modes.advertising); 1137 pl->link_config.interface = config.interface; 1138 pl->link_config.speed = our_kset.base.speed; 1139 pl->link_config.duplex = our_kset.base.duplex; 1140 pl->link_config.an_enabled = our_kset.base.autoneg != AUTONEG_DISABLE; 1141 1142 if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) { 1143 phylink_mac_config(pl, &pl->link_config); 1144 phylink_mac_an_restart(pl); 1145 } 1146 mutex_unlock(&pl->state_mutex); 1147 1148 return 0; 1149 } 1150 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set); 1151 1152 /** 1153 * phylink_ethtool_nway_reset() - restart negotiation 1154 * @pl: a pointer to a &struct phylink returned from phylink_create() 1155 * 1156 * Restart negotiation for the phylink instance specified by @pl. This will 1157 * cause any attached phy to restart negotiation with the link partner, and 1158 * if the MAC is in a BaseX mode, the MAC will also be requested to restart 1159 * negotiation. 1160 * 1161 * Returns zero on success, or negative error code. 1162 */ 1163 int phylink_ethtool_nway_reset(struct phylink *pl) 1164 { 1165 int ret = 0; 1166 1167 ASSERT_RTNL(); 1168 1169 if (pl->phydev) 1170 ret = phy_restart_aneg(pl->phydev); 1171 phylink_mac_an_restart(pl); 1172 1173 return ret; 1174 } 1175 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset); 1176 1177 /** 1178 * phylink_ethtool_get_pauseparam() - get the current pause parameters 1179 * @pl: a pointer to a &struct phylink returned from phylink_create() 1180 * @pause: a pointer to a &struct ethtool_pauseparam 1181 */ 1182 void phylink_ethtool_get_pauseparam(struct phylink *pl, 1183 struct ethtool_pauseparam *pause) 1184 { 1185 ASSERT_RTNL(); 1186 1187 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN); 1188 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX); 1189 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX); 1190 } 1191 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam); 1192 1193 /** 1194 * phylink_ethtool_set_pauseparam() - set the current pause parameters 1195 * @pl: a pointer to a &struct phylink returned from phylink_create() 1196 * @pause: a pointer to a &struct ethtool_pauseparam 1197 */ 1198 int phylink_ethtool_set_pauseparam(struct phylink *pl, 1199 struct ethtool_pauseparam *pause) 1200 { 1201 struct phylink_link_state *config = &pl->link_config; 1202 1203 ASSERT_RTNL(); 1204 1205 if (!phylink_test(pl->supported, Pause) && 1206 !phylink_test(pl->supported, Asym_Pause)) 1207 return -EOPNOTSUPP; 1208 1209 if (!phylink_test(pl->supported, Asym_Pause) && 1210 !pause->autoneg && pause->rx_pause != pause->tx_pause) 1211 return -EINVAL; 1212 1213 config->pause &= ~(MLO_PAUSE_AN | MLO_PAUSE_TXRX_MASK); 1214 1215 if (pause->autoneg) 1216 config->pause |= MLO_PAUSE_AN; 1217 if (pause->rx_pause) 1218 config->pause |= MLO_PAUSE_RX; 1219 if (pause->tx_pause) 1220 config->pause |= MLO_PAUSE_TX; 1221 1222 if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) { 1223 switch (pl->link_an_mode) { 1224 case MLO_AN_PHY: 1225 /* Silently mark the carrier down, and then trigger a resolve */ 1226 netif_carrier_off(pl->netdev); 1227 phylink_run_resolve(pl); 1228 break; 1229 1230 case MLO_AN_FIXED: 1231 /* Should we allow fixed links to change against the config? */ 1232 phylink_resolve_flow(pl, config); 1233 phylink_mac_config(pl, config); 1234 break; 1235 1236 case MLO_AN_INBAND: 1237 phylink_mac_config(pl, config); 1238 phylink_mac_an_restart(pl); 1239 break; 1240 } 1241 } 1242 1243 return 0; 1244 } 1245 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam); 1246 1247 /** 1248 * phylink_ethtool_get_eee_err() - read the energy efficient ethernet error 1249 * counter 1250 * @pl: a pointer to a &struct phylink returned from phylink_create(). 1251 * 1252 * Read the Energy Efficient Ethernet error counter from the PHY associated 1253 * with the phylink instance specified by @pl. 1254 * 1255 * Returns positive error counter value, or negative error code. 1256 */ 1257 int phylink_get_eee_err(struct phylink *pl) 1258 { 1259 int ret = 0; 1260 1261 ASSERT_RTNL(); 1262 1263 if (pl->phydev) 1264 ret = phy_get_eee_err(pl->phydev); 1265 1266 return ret; 1267 } 1268 EXPORT_SYMBOL_GPL(phylink_get_eee_err); 1269 1270 /** 1271 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters 1272 * @pl: a pointer to a &struct phylink returned from phylink_create() 1273 * @eee: a pointer to a &struct ethtool_eee for the read parameters 1274 */ 1275 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee) 1276 { 1277 int ret = -EOPNOTSUPP; 1278 1279 ASSERT_RTNL(); 1280 1281 if (pl->phydev) 1282 ret = phy_ethtool_get_eee(pl->phydev, eee); 1283 1284 return ret; 1285 } 1286 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee); 1287 1288 /** 1289 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters 1290 * @pl: a pointer to a &struct phylink returned from phylink_create() 1291 * @eee: a pointer to a &struct ethtool_eee for the desired parameters 1292 */ 1293 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee) 1294 { 1295 int ret = -EOPNOTSUPP; 1296 1297 ASSERT_RTNL(); 1298 1299 if (pl->phydev) 1300 ret = phy_ethtool_set_eee(pl->phydev, eee); 1301 1302 return ret; 1303 } 1304 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee); 1305 1306 /* This emulates MII registers for a fixed-mode phy operating as per the 1307 * passed in state. "aneg" defines if we report negotiation is possible. 1308 * 1309 * FIXME: should deal with negotiation state too. 1310 */ 1311 static int phylink_mii_emul_read(struct net_device *ndev, unsigned int reg, 1312 struct phylink_link_state *state, bool aneg) 1313 { 1314 struct fixed_phy_status fs; 1315 int val; 1316 1317 fs.link = state->link; 1318 fs.speed = state->speed; 1319 fs.duplex = state->duplex; 1320 fs.pause = state->pause & MLO_PAUSE_SYM; 1321 fs.asym_pause = state->pause & MLO_PAUSE_ASYM; 1322 1323 val = swphy_read_reg(reg, &fs); 1324 if (reg == MII_BMSR) { 1325 if (!state->an_complete) 1326 val &= ~BMSR_ANEGCOMPLETE; 1327 if (!aneg) 1328 val &= ~BMSR_ANEGCAPABLE; 1329 } 1330 return val; 1331 } 1332 1333 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id, 1334 unsigned int reg) 1335 { 1336 struct phy_device *phydev = pl->phydev; 1337 int prtad, devad; 1338 1339 if (mdio_phy_id_is_c45(phy_id)) { 1340 prtad = mdio_phy_id_prtad(phy_id); 1341 devad = mdio_phy_id_devad(phy_id); 1342 devad = MII_ADDR_C45 | devad << 16 | reg; 1343 } else if (phydev->is_c45) { 1344 switch (reg) { 1345 case MII_BMCR: 1346 case MII_BMSR: 1347 case MII_PHYSID1: 1348 case MII_PHYSID2: 1349 devad = __ffs(phydev->c45_ids.devices_in_package); 1350 break; 1351 case MII_ADVERTISE: 1352 case MII_LPA: 1353 if (!(phydev->c45_ids.devices_in_package & MDIO_DEVS_AN)) 1354 return -EINVAL; 1355 devad = MDIO_MMD_AN; 1356 if (reg == MII_ADVERTISE) 1357 reg = MDIO_AN_ADVERTISE; 1358 else 1359 reg = MDIO_AN_LPA; 1360 break; 1361 default: 1362 return -EINVAL; 1363 } 1364 prtad = phy_id; 1365 devad = MII_ADDR_C45 | devad << 16 | reg; 1366 } else { 1367 prtad = phy_id; 1368 devad = reg; 1369 } 1370 return mdiobus_read(pl->phydev->mdio.bus, prtad, devad); 1371 } 1372 1373 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id, 1374 unsigned int reg, unsigned int val) 1375 { 1376 struct phy_device *phydev = pl->phydev; 1377 int prtad, devad; 1378 1379 if (mdio_phy_id_is_c45(phy_id)) { 1380 prtad = mdio_phy_id_prtad(phy_id); 1381 devad = mdio_phy_id_devad(phy_id); 1382 devad = MII_ADDR_C45 | devad << 16 | reg; 1383 } else if (phydev->is_c45) { 1384 switch (reg) { 1385 case MII_BMCR: 1386 case MII_BMSR: 1387 case MII_PHYSID1: 1388 case MII_PHYSID2: 1389 devad = __ffs(phydev->c45_ids.devices_in_package); 1390 break; 1391 case MII_ADVERTISE: 1392 case MII_LPA: 1393 if (!(phydev->c45_ids.devices_in_package & MDIO_DEVS_AN)) 1394 return -EINVAL; 1395 devad = MDIO_MMD_AN; 1396 if (reg == MII_ADVERTISE) 1397 reg = MDIO_AN_ADVERTISE; 1398 else 1399 reg = MDIO_AN_LPA; 1400 break; 1401 default: 1402 return -EINVAL; 1403 } 1404 prtad = phy_id; 1405 devad = MII_ADDR_C45 | devad << 16 | reg; 1406 } else { 1407 prtad = phy_id; 1408 devad = reg; 1409 } 1410 1411 return mdiobus_write(phydev->mdio.bus, prtad, devad, val); 1412 } 1413 1414 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id, 1415 unsigned int reg) 1416 { 1417 struct phylink_link_state state; 1418 int val = 0xffff; 1419 1420 switch (pl->link_an_mode) { 1421 case MLO_AN_FIXED: 1422 if (phy_id == 0) { 1423 phylink_get_fixed_state(pl, &state); 1424 val = phylink_mii_emul_read(pl->netdev, reg, &state, 1425 true); 1426 } 1427 break; 1428 1429 case MLO_AN_PHY: 1430 return -EOPNOTSUPP; 1431 1432 case MLO_AN_INBAND: 1433 if (phy_id == 0) { 1434 val = phylink_get_mac_state(pl, &state); 1435 if (val < 0) 1436 return val; 1437 1438 val = phylink_mii_emul_read(pl->netdev, reg, &state, 1439 true); 1440 } 1441 break; 1442 } 1443 1444 return val & 0xffff; 1445 } 1446 1447 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id, 1448 unsigned int reg, unsigned int val) 1449 { 1450 switch (pl->link_an_mode) { 1451 case MLO_AN_FIXED: 1452 break; 1453 1454 case MLO_AN_PHY: 1455 return -EOPNOTSUPP; 1456 1457 case MLO_AN_INBAND: 1458 break; 1459 } 1460 1461 return 0; 1462 } 1463 1464 /** 1465 * phylink_mii_ioctl() - generic mii ioctl interface 1466 * @pl: a pointer to a &struct phylink returned from phylink_create() 1467 * @ifr: a pointer to a &struct ifreq for socket ioctls 1468 * @cmd: ioctl cmd to execute 1469 * 1470 * Perform the specified MII ioctl on the PHY attached to the phylink instance 1471 * specified by @pl. If no PHY is attached, emulate the presence of the PHY. 1472 * 1473 * Returns: zero on success or negative error code. 1474 * 1475 * %SIOCGMIIPHY: 1476 * read register from the current PHY. 1477 * %SIOCGMIIREG: 1478 * read register from the specified PHY. 1479 * %SIOCSMIIREG: 1480 * set a register on the specified PHY. 1481 */ 1482 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd) 1483 { 1484 struct mii_ioctl_data *mii = if_mii(ifr); 1485 int ret; 1486 1487 ASSERT_RTNL(); 1488 1489 if (pl->phydev) { 1490 /* PHYs only exist for MLO_AN_PHY and SGMII */ 1491 switch (cmd) { 1492 case SIOCGMIIPHY: 1493 mii->phy_id = pl->phydev->mdio.addr; 1494 /* fall through */ 1495 1496 case SIOCGMIIREG: 1497 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num); 1498 if (ret >= 0) { 1499 mii->val_out = ret; 1500 ret = 0; 1501 } 1502 break; 1503 1504 case SIOCSMIIREG: 1505 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num, 1506 mii->val_in); 1507 break; 1508 1509 default: 1510 ret = phy_mii_ioctl(pl->phydev, ifr, cmd); 1511 break; 1512 } 1513 } else { 1514 switch (cmd) { 1515 case SIOCGMIIPHY: 1516 mii->phy_id = 0; 1517 /* fall through */ 1518 1519 case SIOCGMIIREG: 1520 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num); 1521 if (ret >= 0) { 1522 mii->val_out = ret; 1523 ret = 0; 1524 } 1525 break; 1526 1527 case SIOCSMIIREG: 1528 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num, 1529 mii->val_in); 1530 break; 1531 1532 default: 1533 ret = -EOPNOTSUPP; 1534 break; 1535 } 1536 } 1537 1538 return ret; 1539 } 1540 EXPORT_SYMBOL_GPL(phylink_mii_ioctl); 1541 1542 static int phylink_sfp_module_insert(void *upstream, 1543 const struct sfp_eeprom_id *id) 1544 { 1545 struct phylink *pl = upstream; 1546 __ETHTOOL_DECLARE_LINK_MODE_MASK(support) = { 0, }; 1547 struct phylink_link_state config; 1548 phy_interface_t iface; 1549 int ret = 0; 1550 bool changed; 1551 u8 port; 1552 1553 ASSERT_RTNL(); 1554 1555 sfp_parse_support(pl->sfp_bus, id, support); 1556 port = sfp_parse_port(pl->sfp_bus, id, support); 1557 1558 memset(&config, 0, sizeof(config)); 1559 linkmode_copy(config.advertising, support); 1560 config.interface = PHY_INTERFACE_MODE_NA; 1561 config.speed = SPEED_UNKNOWN; 1562 config.duplex = DUPLEX_UNKNOWN; 1563 config.pause = MLO_PAUSE_AN; 1564 config.an_enabled = pl->link_config.an_enabled; 1565 1566 /* Ignore errors if we're expecting a PHY to attach later */ 1567 ret = phylink_validate(pl, support, &config); 1568 if (ret) { 1569 netdev_err(pl->netdev, "validation with support %*pb failed: %d\n", 1570 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret); 1571 return ret; 1572 } 1573 1574 iface = sfp_select_interface(pl->sfp_bus, id, config.advertising); 1575 if (iface == PHY_INTERFACE_MODE_NA) { 1576 netdev_err(pl->netdev, 1577 "selection of interface failed, advertisement %*pb\n", 1578 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising); 1579 return -EINVAL; 1580 } 1581 1582 config.interface = iface; 1583 ret = phylink_validate(pl, support, &config); 1584 if (ret) { 1585 netdev_err(pl->netdev, "validation of %s/%s with support %*pb failed: %d\n", 1586 phylink_an_mode_str(MLO_AN_INBAND), 1587 phy_modes(config.interface), 1588 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret); 1589 return ret; 1590 } 1591 1592 netdev_dbg(pl->netdev, "requesting link mode %s/%s with support %*pb\n", 1593 phylink_an_mode_str(MLO_AN_INBAND), 1594 phy_modes(config.interface), 1595 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 1596 1597 if (phy_interface_mode_is_8023z(iface) && pl->phydev) 1598 return -EINVAL; 1599 1600 changed = !bitmap_equal(pl->supported, support, 1601 __ETHTOOL_LINK_MODE_MASK_NBITS); 1602 if (changed) { 1603 linkmode_copy(pl->supported, support); 1604 linkmode_copy(pl->link_config.advertising, config.advertising); 1605 } 1606 1607 if (pl->link_an_mode != MLO_AN_INBAND || 1608 pl->link_config.interface != config.interface) { 1609 pl->link_config.interface = config.interface; 1610 pl->link_an_mode = MLO_AN_INBAND; 1611 1612 changed = true; 1613 1614 netdev_info(pl->netdev, "switched to %s/%s link mode\n", 1615 phylink_an_mode_str(MLO_AN_INBAND), 1616 phy_modes(config.interface)); 1617 } 1618 1619 pl->link_port = port; 1620 1621 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED, 1622 &pl->phylink_disable_state)) 1623 phylink_mac_config(pl, &pl->link_config); 1624 1625 return ret; 1626 } 1627 1628 static void phylink_sfp_link_down(void *upstream) 1629 { 1630 struct phylink *pl = upstream; 1631 1632 ASSERT_RTNL(); 1633 1634 set_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state); 1635 queue_work(system_power_efficient_wq, &pl->resolve); 1636 flush_work(&pl->resolve); 1637 } 1638 1639 static void phylink_sfp_link_up(void *upstream) 1640 { 1641 struct phylink *pl = upstream; 1642 1643 ASSERT_RTNL(); 1644 1645 clear_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state); 1646 phylink_run_resolve(pl); 1647 } 1648 1649 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy) 1650 { 1651 return phylink_connect_phy(upstream, phy); 1652 } 1653 1654 static void phylink_sfp_disconnect_phy(void *upstream) 1655 { 1656 phylink_disconnect_phy(upstream); 1657 } 1658 1659 static const struct sfp_upstream_ops sfp_phylink_ops = { 1660 .module_insert = phylink_sfp_module_insert, 1661 .link_up = phylink_sfp_link_up, 1662 .link_down = phylink_sfp_link_down, 1663 .connect_phy = phylink_sfp_connect_phy, 1664 .disconnect_phy = phylink_sfp_disconnect_phy, 1665 }; 1666 1667 /* Helpers for MAC drivers */ 1668 1669 /** 1670 * phylink_helper_basex_speed() - 1000BaseX/2500BaseX helper 1671 * @state: a pointer to a &struct phylink_link_state 1672 * 1673 * Inspect the interface mode, advertising mask or forced speed and 1674 * decide whether to run at 2.5Gbit or 1Gbit appropriately, switching 1675 * the interface mode to suit. @state->interface is appropriately 1676 * updated, and the advertising mask has the "other" baseX_Full flag 1677 * cleared. 1678 */ 1679 void phylink_helper_basex_speed(struct phylink_link_state *state) 1680 { 1681 if (phy_interface_mode_is_8023z(state->interface)) { 1682 bool want_2500 = state->an_enabled ? 1683 phylink_test(state->advertising, 2500baseX_Full) : 1684 state->speed == SPEED_2500; 1685 1686 if (want_2500) { 1687 phylink_clear(state->advertising, 1000baseX_Full); 1688 state->interface = PHY_INTERFACE_MODE_2500BASEX; 1689 } else { 1690 phylink_clear(state->advertising, 2500baseX_Full); 1691 state->interface = PHY_INTERFACE_MODE_1000BASEX; 1692 } 1693 } 1694 } 1695 EXPORT_SYMBOL_GPL(phylink_helper_basex_speed); 1696 1697 MODULE_LICENSE("GPL"); 1698