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/workqueue.h> 23 24 #include "sfp.h" 25 #include "swphy.h" 26 27 #define SUPPORTED_INTERFACES \ 28 (SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE | \ 29 SUPPORTED_BNC | SUPPORTED_AUI | SUPPORTED_Backplane) 30 #define ADVERTISED_INTERFACES \ 31 (ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \ 32 ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane) 33 34 enum { 35 PHYLINK_DISABLE_STOPPED, 36 PHYLINK_DISABLE_LINK, 37 }; 38 39 /** 40 * struct phylink - internal data type for phylink 41 */ 42 struct phylink { 43 /* private: */ 44 struct net_device *netdev; 45 const struct phylink_mac_ops *ops; 46 47 unsigned long phylink_disable_state; /* bitmask of disables */ 48 struct phy_device *phydev; 49 phy_interface_t link_interface; /* PHY_INTERFACE_xxx */ 50 u8 link_an_mode; /* MLO_AN_xxx */ 51 u8 link_port; /* The current non-phy ethtool port */ 52 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 53 54 /* The link configuration settings */ 55 struct phylink_link_state link_config; 56 struct gpio_desc *link_gpio; 57 void (*get_fixed_state)(struct net_device *dev, 58 struct phylink_link_state *s); 59 60 struct mutex state_mutex; 61 struct phylink_link_state phy_state; 62 struct work_struct resolve; 63 64 bool mac_link_dropped; 65 66 struct sfp_bus *sfp_bus; 67 }; 68 69 static inline void linkmode_zero(unsigned long *dst) 70 { 71 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS); 72 } 73 74 static inline void linkmode_copy(unsigned long *dst, const unsigned long *src) 75 { 76 bitmap_copy(dst, src, __ETHTOOL_LINK_MODE_MASK_NBITS); 77 } 78 79 static inline void linkmode_and(unsigned long *dst, const unsigned long *a, 80 const unsigned long *b) 81 { 82 bitmap_and(dst, a, b, __ETHTOOL_LINK_MODE_MASK_NBITS); 83 } 84 85 static inline void linkmode_or(unsigned long *dst, const unsigned long *a, 86 const unsigned long *b) 87 { 88 bitmap_or(dst, a, b, __ETHTOOL_LINK_MODE_MASK_NBITS); 89 } 90 91 static inline bool linkmode_empty(const unsigned long *src) 92 { 93 return bitmap_empty(src, __ETHTOOL_LINK_MODE_MASK_NBITS); 94 } 95 96 /** 97 * phylink_set_port_modes() - set the port type modes in the ethtool mask 98 * @mask: ethtool link mode mask 99 * 100 * Sets all the port type modes in the ethtool mask. MAC drivers should 101 * use this in their 'validate' callback. 102 */ 103 void phylink_set_port_modes(unsigned long *mask) 104 { 105 phylink_set(mask, TP); 106 phylink_set(mask, AUI); 107 phylink_set(mask, MII); 108 phylink_set(mask, FIBRE); 109 phylink_set(mask, BNC); 110 phylink_set(mask, Backplane); 111 } 112 EXPORT_SYMBOL_GPL(phylink_set_port_modes); 113 114 static int phylink_is_empty_linkmode(const unsigned long *linkmode) 115 { 116 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, }; 117 118 phylink_set_port_modes(tmp); 119 phylink_set(tmp, Autoneg); 120 phylink_set(tmp, Pause); 121 phylink_set(tmp, Asym_Pause); 122 123 bitmap_andnot(tmp, linkmode, tmp, __ETHTOOL_LINK_MODE_MASK_NBITS); 124 125 return linkmode_empty(tmp); 126 } 127 128 static const char *phylink_an_mode_str(unsigned int mode) 129 { 130 static const char *modestr[] = { 131 [MLO_AN_PHY] = "phy", 132 [MLO_AN_FIXED] = "fixed", 133 [MLO_AN_INBAND] = "inband", 134 }; 135 136 return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown"; 137 } 138 139 static int phylink_validate(struct phylink *pl, unsigned long *supported, 140 struct phylink_link_state *state) 141 { 142 pl->ops->validate(pl->netdev, supported, state); 143 144 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; 145 } 146 147 static int phylink_parse_fixedlink(struct phylink *pl, 148 struct fwnode_handle *fwnode) 149 { 150 struct fwnode_handle *fixed_node; 151 const struct phy_setting *s; 152 struct gpio_desc *desc; 153 u32 speed; 154 int ret; 155 156 fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link"); 157 if (fixed_node) { 158 ret = fwnode_property_read_u32(fixed_node, "speed", &speed); 159 160 pl->link_config.speed = speed; 161 pl->link_config.duplex = DUPLEX_HALF; 162 163 if (fwnode_property_read_bool(fixed_node, "full-duplex")) 164 pl->link_config.duplex = DUPLEX_FULL; 165 166 /* We treat the "pause" and "asym-pause" terminology as 167 * defining the link partner's ability. */ 168 if (fwnode_property_read_bool(fixed_node, "pause")) 169 pl->link_config.pause |= MLO_PAUSE_SYM; 170 if (fwnode_property_read_bool(fixed_node, "asym-pause")) 171 pl->link_config.pause |= MLO_PAUSE_ASYM; 172 173 if (ret == 0) { 174 desc = fwnode_get_named_gpiod(fixed_node, "link-gpios", 175 0, GPIOD_IN, "?"); 176 177 if (!IS_ERR(desc)) 178 pl->link_gpio = desc; 179 else if (desc == ERR_PTR(-EPROBE_DEFER)) 180 ret = -EPROBE_DEFER; 181 } 182 fwnode_handle_put(fixed_node); 183 184 if (ret) 185 return ret; 186 } else { 187 u32 prop[5]; 188 189 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 190 NULL, 0); 191 if (ret != ARRAY_SIZE(prop)) { 192 netdev_err(pl->netdev, "broken fixed-link?\n"); 193 return -EINVAL; 194 } 195 196 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 197 prop, ARRAY_SIZE(prop)); 198 if (!ret) { 199 pl->link_config.duplex = prop[1] ? 200 DUPLEX_FULL : DUPLEX_HALF; 201 pl->link_config.speed = prop[2]; 202 if (prop[3]) 203 pl->link_config.pause |= MLO_PAUSE_SYM; 204 if (prop[4]) 205 pl->link_config.pause |= MLO_PAUSE_ASYM; 206 } 207 } 208 209 if (pl->link_config.speed > SPEED_1000 && 210 pl->link_config.duplex != DUPLEX_FULL) 211 netdev_warn(pl->netdev, "fixed link specifies half duplex for %dMbps link?\n", 212 pl->link_config.speed); 213 214 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 215 linkmode_copy(pl->link_config.advertising, pl->supported); 216 phylink_validate(pl, pl->supported, &pl->link_config); 217 218 s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex, 219 pl->supported, 220 __ETHTOOL_LINK_MODE_MASK_NBITS, true); 221 linkmode_zero(pl->supported); 222 phylink_set(pl->supported, MII); 223 if (s) { 224 __set_bit(s->bit, pl->supported); 225 } else { 226 netdev_warn(pl->netdev, "fixed link %s duplex %dMbps not recognised\n", 227 pl->link_config.duplex == DUPLEX_FULL ? "full" : "half", 228 pl->link_config.speed); 229 } 230 231 linkmode_and(pl->link_config.advertising, pl->link_config.advertising, 232 pl->supported); 233 234 pl->link_config.link = 1; 235 pl->link_config.an_complete = 1; 236 237 return 0; 238 } 239 240 static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode) 241 { 242 struct fwnode_handle *dn; 243 const char *managed; 244 245 dn = fwnode_get_named_child_node(fwnode, "fixed-link"); 246 if (dn || fwnode_property_present(fwnode, "fixed-link")) 247 pl->link_an_mode = MLO_AN_FIXED; 248 fwnode_handle_put(dn); 249 250 if (fwnode_property_read_string(fwnode, "managed", &managed) == 0 && 251 strcmp(managed, "in-band-status") == 0) { 252 if (pl->link_an_mode == MLO_AN_FIXED) { 253 netdev_err(pl->netdev, 254 "can't use both fixed-link and in-band-status\n"); 255 return -EINVAL; 256 } 257 258 linkmode_zero(pl->supported); 259 phylink_set(pl->supported, MII); 260 phylink_set(pl->supported, Autoneg); 261 phylink_set(pl->supported, Asym_Pause); 262 phylink_set(pl->supported, Pause); 263 pl->link_config.an_enabled = true; 264 pl->link_an_mode = MLO_AN_INBAND; 265 266 switch (pl->link_config.interface) { 267 case PHY_INTERFACE_MODE_SGMII: 268 phylink_set(pl->supported, 10baseT_Half); 269 phylink_set(pl->supported, 10baseT_Full); 270 phylink_set(pl->supported, 100baseT_Half); 271 phylink_set(pl->supported, 100baseT_Full); 272 phylink_set(pl->supported, 1000baseT_Half); 273 phylink_set(pl->supported, 1000baseT_Full); 274 break; 275 276 case PHY_INTERFACE_MODE_1000BASEX: 277 phylink_set(pl->supported, 1000baseX_Full); 278 break; 279 280 case PHY_INTERFACE_MODE_2500BASEX: 281 phylink_set(pl->supported, 2500baseX_Full); 282 break; 283 284 case PHY_INTERFACE_MODE_10GKR: 285 phylink_set(pl->supported, 10baseT_Half); 286 phylink_set(pl->supported, 10baseT_Full); 287 phylink_set(pl->supported, 100baseT_Half); 288 phylink_set(pl->supported, 100baseT_Full); 289 phylink_set(pl->supported, 1000baseT_Half); 290 phylink_set(pl->supported, 1000baseT_Full); 291 phylink_set(pl->supported, 1000baseX_Full); 292 phylink_set(pl->supported, 10000baseKR_Full); 293 phylink_set(pl->supported, 10000baseCR_Full); 294 phylink_set(pl->supported, 10000baseSR_Full); 295 phylink_set(pl->supported, 10000baseLR_Full); 296 phylink_set(pl->supported, 10000baseLRM_Full); 297 phylink_set(pl->supported, 10000baseER_Full); 298 break; 299 300 default: 301 netdev_err(pl->netdev, 302 "incorrect link mode %s for in-band status\n", 303 phy_modes(pl->link_config.interface)); 304 return -EINVAL; 305 } 306 307 linkmode_copy(pl->link_config.advertising, pl->supported); 308 309 if (phylink_validate(pl, pl->supported, &pl->link_config)) { 310 netdev_err(pl->netdev, 311 "failed to validate link configuration for in-band status\n"); 312 return -EINVAL; 313 } 314 } 315 316 return 0; 317 } 318 319 static void phylink_mac_config(struct phylink *pl, 320 const struct phylink_link_state *state) 321 { 322 netdev_dbg(pl->netdev, 323 "%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n", 324 __func__, phylink_an_mode_str(pl->link_an_mode), 325 phy_modes(state->interface), 326 phy_speed_to_str(state->speed), 327 phy_duplex_to_str(state->duplex), 328 __ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising, 329 state->pause, state->link, state->an_enabled); 330 331 pl->ops->mac_config(pl->netdev, pl->link_an_mode, state); 332 } 333 334 static void phylink_mac_an_restart(struct phylink *pl) 335 { 336 if (pl->link_config.an_enabled && 337 phy_interface_mode_is_8023z(pl->link_config.interface)) 338 pl->ops->mac_an_restart(pl->netdev); 339 } 340 341 static int phylink_get_mac_state(struct phylink *pl, struct phylink_link_state *state) 342 { 343 struct net_device *ndev = pl->netdev; 344 345 linkmode_copy(state->advertising, pl->link_config.advertising); 346 linkmode_zero(state->lp_advertising); 347 state->interface = pl->link_config.interface; 348 state->an_enabled = pl->link_config.an_enabled; 349 state->link = 1; 350 351 return pl->ops->mac_link_state(ndev, state); 352 } 353 354 /* The fixed state is... fixed except for the link state, 355 * which may be determined by a GPIO or a callback. 356 */ 357 static void phylink_get_fixed_state(struct phylink *pl, struct phylink_link_state *state) 358 { 359 *state = pl->link_config; 360 if (pl->get_fixed_state) 361 pl->get_fixed_state(pl->netdev, state); 362 else if (pl->link_gpio) 363 state->link = !!gpiod_get_value(pl->link_gpio); 364 } 365 366 /* Flow control is resolved according to our and the link partners 367 * advertisements using the following drawn from the 802.3 specs: 368 * Local device Link partner 369 * Pause AsymDir Pause AsymDir Result 370 * 1 X 1 X TX+RX 371 * 0 1 1 1 RX 372 * 1 1 0 1 TX 373 */ 374 static void phylink_resolve_flow(struct phylink *pl, 375 struct phylink_link_state *state) 376 { 377 int new_pause = 0; 378 379 if (pl->link_config.pause & MLO_PAUSE_AN) { 380 int pause = 0; 381 382 if (phylink_test(pl->link_config.advertising, Pause)) 383 pause |= MLO_PAUSE_SYM; 384 if (phylink_test(pl->link_config.advertising, Asym_Pause)) 385 pause |= MLO_PAUSE_ASYM; 386 387 pause &= state->pause; 388 389 if (pause & MLO_PAUSE_SYM) 390 new_pause = MLO_PAUSE_TX | MLO_PAUSE_RX; 391 else if (pause & MLO_PAUSE_ASYM) 392 new_pause = state->pause & MLO_PAUSE_SYM ? 393 MLO_PAUSE_RX : MLO_PAUSE_TX; 394 } else { 395 new_pause = pl->link_config.pause & MLO_PAUSE_TXRX_MASK; 396 } 397 398 state->pause &= ~MLO_PAUSE_TXRX_MASK; 399 state->pause |= new_pause; 400 } 401 402 static const char *phylink_pause_to_str(int pause) 403 { 404 switch (pause & MLO_PAUSE_TXRX_MASK) { 405 case MLO_PAUSE_TX | MLO_PAUSE_RX: 406 return "rx/tx"; 407 case MLO_PAUSE_TX: 408 return "tx"; 409 case MLO_PAUSE_RX: 410 return "rx"; 411 default: 412 return "off"; 413 } 414 } 415 416 static void phylink_resolve(struct work_struct *w) 417 { 418 struct phylink *pl = container_of(w, struct phylink, resolve); 419 struct phylink_link_state link_state; 420 struct net_device *ndev = pl->netdev; 421 422 mutex_lock(&pl->state_mutex); 423 if (pl->phylink_disable_state) { 424 pl->mac_link_dropped = false; 425 link_state.link = false; 426 } else if (pl->mac_link_dropped) { 427 link_state.link = false; 428 } else { 429 switch (pl->link_an_mode) { 430 case MLO_AN_PHY: 431 link_state = pl->phy_state; 432 phylink_resolve_flow(pl, &link_state); 433 phylink_mac_config(pl, &link_state); 434 break; 435 436 case MLO_AN_FIXED: 437 phylink_get_fixed_state(pl, &link_state); 438 phylink_mac_config(pl, &link_state); 439 break; 440 441 case MLO_AN_INBAND: 442 phylink_get_mac_state(pl, &link_state); 443 if (pl->phydev) { 444 bool changed = false; 445 446 link_state.link = link_state.link && 447 pl->phy_state.link; 448 449 if (pl->phy_state.interface != 450 link_state.interface) { 451 link_state.interface = pl->phy_state.interface; 452 changed = true; 453 } 454 455 /* Propagate the flow control from the PHY 456 * to the MAC. Also propagate the interface 457 * if changed. 458 */ 459 if (pl->phy_state.link || changed) { 460 link_state.pause |= pl->phy_state.pause; 461 phylink_resolve_flow(pl, &link_state); 462 463 phylink_mac_config(pl, &link_state); 464 } 465 } 466 break; 467 } 468 } 469 470 if (link_state.link != netif_carrier_ok(ndev)) { 471 if (!link_state.link) { 472 netif_carrier_off(ndev); 473 pl->ops->mac_link_down(ndev, pl->link_an_mode, 474 pl->phy_state.interface); 475 netdev_info(ndev, "Link is Down\n"); 476 } else { 477 pl->ops->mac_link_up(ndev, pl->link_an_mode, 478 pl->phy_state.interface, 479 pl->phydev); 480 481 netif_carrier_on(ndev); 482 483 netdev_info(ndev, 484 "Link is Up - %s/%s - flow control %s\n", 485 phy_speed_to_str(link_state.speed), 486 phy_duplex_to_str(link_state.duplex), 487 phylink_pause_to_str(link_state.pause)); 488 } 489 } 490 if (!link_state.link && pl->mac_link_dropped) { 491 pl->mac_link_dropped = false; 492 queue_work(system_power_efficient_wq, &pl->resolve); 493 } 494 mutex_unlock(&pl->state_mutex); 495 } 496 497 static void phylink_run_resolve(struct phylink *pl) 498 { 499 if (!pl->phylink_disable_state) 500 queue_work(system_power_efficient_wq, &pl->resolve); 501 } 502 503 static const struct sfp_upstream_ops sfp_phylink_ops; 504 505 static int phylink_register_sfp(struct phylink *pl, 506 struct fwnode_handle *fwnode) 507 { 508 struct fwnode_reference_args ref; 509 int ret; 510 511 if (!fwnode) 512 return 0; 513 514 ret = fwnode_property_get_reference_args(fwnode, "sfp", NULL, 515 0, 0, &ref); 516 if (ret < 0) { 517 if (ret == -ENOENT) 518 return 0; 519 520 netdev_err(pl->netdev, "unable to parse \"sfp\" node: %d\n", 521 ret); 522 return ret; 523 } 524 525 pl->sfp_bus = sfp_register_upstream(ref.fwnode, pl->netdev, pl, 526 &sfp_phylink_ops); 527 if (!pl->sfp_bus) 528 return -ENOMEM; 529 530 return 0; 531 } 532 533 /** 534 * phylink_create() - create a phylink instance 535 * @ndev: a pointer to the &struct net_device 536 * @fwnode: a pointer to a &struct fwnode_handle describing the network 537 * interface 538 * @iface: the desired link mode defined by &typedef phy_interface_t 539 * @ops: a pointer to a &struct phylink_mac_ops for the MAC. 540 * 541 * Create a new phylink instance, and parse the link parameters found in @np. 542 * This will parse in-band modes, fixed-link or SFP configuration. 543 * 544 * Returns a pointer to a &struct phylink, or an error-pointer value. Users 545 * must use IS_ERR() to check for errors from this function. 546 */ 547 struct phylink *phylink_create(struct net_device *ndev, 548 struct fwnode_handle *fwnode, 549 phy_interface_t iface, 550 const struct phylink_mac_ops *ops) 551 { 552 struct phylink *pl; 553 int ret; 554 555 pl = kzalloc(sizeof(*pl), GFP_KERNEL); 556 if (!pl) 557 return ERR_PTR(-ENOMEM); 558 559 mutex_init(&pl->state_mutex); 560 INIT_WORK(&pl->resolve, phylink_resolve); 561 pl->netdev = ndev; 562 pl->phy_state.interface = iface; 563 pl->link_interface = iface; 564 if (iface == PHY_INTERFACE_MODE_MOCA) 565 pl->link_port = PORT_BNC; 566 else 567 pl->link_port = PORT_MII; 568 pl->link_config.interface = iface; 569 pl->link_config.pause = MLO_PAUSE_AN; 570 pl->link_config.speed = SPEED_UNKNOWN; 571 pl->link_config.duplex = DUPLEX_UNKNOWN; 572 pl->link_config.an_enabled = true; 573 pl->ops = ops; 574 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 575 576 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 577 linkmode_copy(pl->link_config.advertising, pl->supported); 578 phylink_validate(pl, pl->supported, &pl->link_config); 579 580 ret = phylink_parse_mode(pl, fwnode); 581 if (ret < 0) { 582 kfree(pl); 583 return ERR_PTR(ret); 584 } 585 586 if (pl->link_an_mode == MLO_AN_FIXED) { 587 ret = phylink_parse_fixedlink(pl, fwnode); 588 if (ret < 0) { 589 kfree(pl); 590 return ERR_PTR(ret); 591 } 592 } 593 594 ret = phylink_register_sfp(pl, fwnode); 595 if (ret < 0) { 596 kfree(pl); 597 return ERR_PTR(ret); 598 } 599 600 return pl; 601 } 602 EXPORT_SYMBOL_GPL(phylink_create); 603 604 /** 605 * phylink_destroy() - cleanup and destroy the phylink instance 606 * @pl: a pointer to a &struct phylink returned from phylink_create() 607 * 608 * Destroy a phylink instance. Any PHY that has been attached must have been 609 * cleaned up via phylink_disconnect_phy() prior to calling this function. 610 */ 611 void phylink_destroy(struct phylink *pl) 612 { 613 if (pl->sfp_bus) 614 sfp_unregister_upstream(pl->sfp_bus); 615 616 cancel_work_sync(&pl->resolve); 617 kfree(pl); 618 } 619 EXPORT_SYMBOL_GPL(phylink_destroy); 620 621 static void phylink_phy_change(struct phy_device *phydev, bool up, 622 bool do_carrier) 623 { 624 struct phylink *pl = phydev->phylink; 625 626 mutex_lock(&pl->state_mutex); 627 pl->phy_state.speed = phydev->speed; 628 pl->phy_state.duplex = phydev->duplex; 629 pl->phy_state.pause = MLO_PAUSE_NONE; 630 if (phydev->pause) 631 pl->phy_state.pause |= MLO_PAUSE_SYM; 632 if (phydev->asym_pause) 633 pl->phy_state.pause |= MLO_PAUSE_ASYM; 634 pl->phy_state.interface = phydev->interface; 635 pl->phy_state.link = up; 636 mutex_unlock(&pl->state_mutex); 637 638 phylink_run_resolve(pl); 639 640 netdev_dbg(pl->netdev, "phy link %s %s/%s/%s\n", up ? "up" : "down", 641 phy_modes(phydev->interface), 642 phy_speed_to_str(phydev->speed), 643 phy_duplex_to_str(phydev->duplex)); 644 } 645 646 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy) 647 { 648 struct phylink_link_state config; 649 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 650 u32 advertising; 651 int ret; 652 653 memset(&config, 0, sizeof(config)); 654 ethtool_convert_legacy_u32_to_link_mode(supported, phy->supported); 655 ethtool_convert_legacy_u32_to_link_mode(config.advertising, 656 phy->advertising); 657 config.interface = pl->link_config.interface; 658 659 /* 660 * This is the new way of dealing with flow control for PHYs, 661 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 662 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 663 * using our validate call to the MAC, we rely upon the MAC 664 * clearing the bits from both supported and advertising fields. 665 */ 666 if (phylink_test(supported, Pause)) 667 phylink_set(config.advertising, Pause); 668 if (phylink_test(supported, Asym_Pause)) 669 phylink_set(config.advertising, Asym_Pause); 670 671 ret = phylink_validate(pl, supported, &config); 672 if (ret) 673 return ret; 674 675 phy->phylink = pl; 676 phy->phy_link_change = phylink_phy_change; 677 678 netdev_info(pl->netdev, 679 "PHY [%s] driver [%s]\n", dev_name(&phy->mdio.dev), 680 phy->drv->name); 681 682 mutex_lock(&phy->lock); 683 mutex_lock(&pl->state_mutex); 684 pl->phydev = phy; 685 linkmode_copy(pl->supported, supported); 686 linkmode_copy(pl->link_config.advertising, config.advertising); 687 688 /* Restrict the phy advertisement according to the MAC support. */ 689 ethtool_convert_link_mode_to_legacy_u32(&advertising, config.advertising); 690 phy->advertising = advertising; 691 mutex_unlock(&pl->state_mutex); 692 mutex_unlock(&phy->lock); 693 694 netdev_dbg(pl->netdev, 695 "phy: setting supported %*pb advertising 0x%08x\n", 696 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported, 697 phy->advertising); 698 699 phy_start_machine(phy); 700 if (phy->irq > 0) 701 phy_start_interrupts(phy); 702 703 return 0; 704 } 705 706 /** 707 * phylink_connect_phy() - connect a PHY to the phylink instance 708 * @pl: a pointer to a &struct phylink returned from phylink_create() 709 * @phy: a pointer to a &struct phy_device. 710 * 711 * Connect @phy to the phylink instance specified by @pl by calling 712 * phy_attach_direct(). Configure the @phy according to the MAC driver's 713 * capabilities, start the PHYLIB state machine and enable any interrupts 714 * that the PHY supports. 715 * 716 * This updates the phylink's ethtool supported and advertising link mode 717 * masks. 718 * 719 * Returns 0 on success or a negative errno. 720 */ 721 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy) 722 { 723 int ret; 724 725 if (WARN_ON(pl->link_an_mode == MLO_AN_FIXED || 726 (pl->link_an_mode == MLO_AN_INBAND && 727 phy_interface_mode_is_8023z(pl->link_interface)))) 728 return -EINVAL; 729 730 if (pl->phydev) 731 return -EBUSY; 732 733 /* Use PHY device/driver interface */ 734 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 735 pl->link_interface = phy->interface; 736 pl->link_config.interface = pl->link_interface; 737 } 738 739 ret = phy_attach_direct(pl->netdev, phy, 0, pl->link_interface); 740 if (ret) 741 return ret; 742 743 ret = phylink_bringup_phy(pl, phy); 744 if (ret) 745 phy_detach(phy); 746 747 return ret; 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 /* Apply the link configuration to the MAC when starting. This allows 891 * a fixed-link to start with the correct parameters, and also 892 * ensures that we set the appropriate advertisement for Serdes links. 893 */ 894 phylink_resolve_flow(pl, &pl->link_config); 895 phylink_mac_config(pl, &pl->link_config); 896 897 /* Restart autonegotiation if using 802.3z to ensure that the link 898 * parameters are properly negotiated. This is necessary for DSA 899 * switches using 802.3z negotiation to ensure they see our modes. 900 */ 901 phylink_mac_an_restart(pl); 902 903 clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 904 phylink_run_resolve(pl); 905 906 if (pl->sfp_bus) 907 sfp_upstream_start(pl->sfp_bus); 908 if (pl->phydev) 909 phy_start(pl->phydev); 910 } 911 EXPORT_SYMBOL_GPL(phylink_start); 912 913 /** 914 * phylink_stop() - stop a phylink instance 915 * @pl: a pointer to a &struct phylink returned from phylink_create() 916 * 917 * Stop the phylink instance specified by @pl. This should be called from the 918 * network device driver's &struct net_device_ops ndo_stop() method. The 919 * network device's carrier state should not be changed prior to calling this 920 * function. 921 */ 922 void phylink_stop(struct phylink *pl) 923 { 924 ASSERT_RTNL(); 925 926 if (pl->phydev) 927 phy_stop(pl->phydev); 928 if (pl->sfp_bus) 929 sfp_upstream_stop(pl->sfp_bus); 930 931 set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 932 queue_work(system_power_efficient_wq, &pl->resolve); 933 flush_work(&pl->resolve); 934 } 935 EXPORT_SYMBOL_GPL(phylink_stop); 936 937 /** 938 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY 939 * @pl: a pointer to a &struct phylink returned from phylink_create() 940 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters 941 * 942 * Read the wake on lan parameters from the PHY attached to the phylink 943 * instance specified by @pl. If no PHY is currently attached, report no 944 * support for wake on lan. 945 */ 946 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 947 { 948 ASSERT_RTNL(); 949 950 wol->supported = 0; 951 wol->wolopts = 0; 952 953 if (pl->phydev) 954 phy_ethtool_get_wol(pl->phydev, wol); 955 } 956 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol); 957 958 /** 959 * phylink_ethtool_set_wol() - set wake on lan parameters 960 * @pl: a pointer to a &struct phylink returned from phylink_create() 961 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters 962 * 963 * Set the wake on lan parameters for the PHY attached to the phylink 964 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP 965 * error. 966 * 967 * Returns zero on success or negative errno code. 968 */ 969 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 970 { 971 int ret = -EOPNOTSUPP; 972 973 ASSERT_RTNL(); 974 975 if (pl->phydev) 976 ret = phy_ethtool_set_wol(pl->phydev, wol); 977 978 return ret; 979 } 980 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol); 981 982 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b) 983 { 984 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask); 985 986 linkmode_zero(mask); 987 phylink_set_port_modes(mask); 988 989 linkmode_and(dst, dst, mask); 990 linkmode_or(dst, dst, b); 991 } 992 993 static void phylink_get_ksettings(const struct phylink_link_state *state, 994 struct ethtool_link_ksettings *kset) 995 { 996 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising); 997 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising); 998 kset->base.speed = state->speed; 999 kset->base.duplex = state->duplex; 1000 kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE : 1001 AUTONEG_DISABLE; 1002 } 1003 1004 /** 1005 * phylink_ethtool_ksettings_get() - get the current link settings 1006 * @pl: a pointer to a &struct phylink returned from phylink_create() 1007 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings 1008 * 1009 * Read the current link settings for the phylink instance specified by @pl. 1010 * This will be the link settings read from the MAC, PHY or fixed link 1011 * settings depending on the current negotiation mode. 1012 */ 1013 int phylink_ethtool_ksettings_get(struct phylink *pl, 1014 struct ethtool_link_ksettings *kset) 1015 { 1016 struct phylink_link_state link_state; 1017 1018 ASSERT_RTNL(); 1019 1020 if (pl->phydev) { 1021 phy_ethtool_ksettings_get(pl->phydev, kset); 1022 } else { 1023 kset->base.port = pl->link_port; 1024 } 1025 1026 linkmode_copy(kset->link_modes.supported, pl->supported); 1027 1028 switch (pl->link_an_mode) { 1029 case MLO_AN_FIXED: 1030 /* We are using fixed settings. Report these as the 1031 * current link settings - and note that these also 1032 * represent the supported speeds/duplex/pause modes. 1033 */ 1034 phylink_get_fixed_state(pl, &link_state); 1035 phylink_get_ksettings(&link_state, kset); 1036 break; 1037 1038 case MLO_AN_INBAND: 1039 /* If there is a phy attached, then use the reported 1040 * settings from the phy with no modification. 1041 */ 1042 if (pl->phydev) 1043 break; 1044 1045 phylink_get_mac_state(pl, &link_state); 1046 1047 /* The MAC is reporting the link results from its own PCS 1048 * layer via in-band status. Report these as the current 1049 * link settings. 1050 */ 1051 phylink_get_ksettings(&link_state, kset); 1052 break; 1053 } 1054 1055 return 0; 1056 } 1057 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get); 1058 1059 /** 1060 * phylink_ethtool_ksettings_set() - set the link settings 1061 * @pl: a pointer to a &struct phylink returned from phylink_create() 1062 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes 1063 */ 1064 int phylink_ethtool_ksettings_set(struct phylink *pl, 1065 const struct ethtool_link_ksettings *kset) 1066 { 1067 struct ethtool_link_ksettings our_kset; 1068 struct phylink_link_state config; 1069 int ret; 1070 1071 ASSERT_RTNL(); 1072 1073 if (kset->base.autoneg != AUTONEG_DISABLE && 1074 kset->base.autoneg != AUTONEG_ENABLE) 1075 return -EINVAL; 1076 1077 config = pl->link_config; 1078 1079 /* Mask out unsupported advertisements */ 1080 linkmode_and(config.advertising, kset->link_modes.advertising, 1081 pl->supported); 1082 1083 /* FIXME: should we reject autoneg if phy/mac does not support it? */ 1084 if (kset->base.autoneg == AUTONEG_DISABLE) { 1085 const struct phy_setting *s; 1086 1087 /* Autonegotiation disabled, select a suitable speed and 1088 * duplex. 1089 */ 1090 s = phy_lookup_setting(kset->base.speed, kset->base.duplex, 1091 pl->supported, 1092 __ETHTOOL_LINK_MODE_MASK_NBITS, false); 1093 if (!s) 1094 return -EINVAL; 1095 1096 /* If we have a fixed link (as specified by firmware), refuse 1097 * to change link parameters. 1098 */ 1099 if (pl->link_an_mode == MLO_AN_FIXED && 1100 (s->speed != pl->link_config.speed || 1101 s->duplex != pl->link_config.duplex)) 1102 return -EINVAL; 1103 1104 config.speed = s->speed; 1105 config.duplex = s->duplex; 1106 config.an_enabled = false; 1107 1108 __clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising); 1109 } else { 1110 /* If we have a fixed link, refuse to enable autonegotiation */ 1111 if (pl->link_an_mode == MLO_AN_FIXED) 1112 return -EINVAL; 1113 1114 config.speed = SPEED_UNKNOWN; 1115 config.duplex = DUPLEX_UNKNOWN; 1116 config.an_enabled = true; 1117 1118 __set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising); 1119 } 1120 1121 if (phylink_validate(pl, pl->supported, &config)) 1122 return -EINVAL; 1123 1124 /* If autonegotiation is enabled, we must have an advertisement */ 1125 if (config.an_enabled && phylink_is_empty_linkmode(config.advertising)) 1126 return -EINVAL; 1127 1128 our_kset = *kset; 1129 linkmode_copy(our_kset.link_modes.advertising, config.advertising); 1130 our_kset.base.speed = config.speed; 1131 our_kset.base.duplex = config.duplex; 1132 1133 /* If we have a PHY, configure the phy */ 1134 if (pl->phydev) { 1135 ret = phy_ethtool_ksettings_set(pl->phydev, &our_kset); 1136 if (ret) 1137 return ret; 1138 } 1139 1140 mutex_lock(&pl->state_mutex); 1141 /* Configure the MAC to match the new settings */ 1142 linkmode_copy(pl->link_config.advertising, our_kset.link_modes.advertising); 1143 pl->link_config.interface = config.interface; 1144 pl->link_config.speed = our_kset.base.speed; 1145 pl->link_config.duplex = our_kset.base.duplex; 1146 pl->link_config.an_enabled = our_kset.base.autoneg != AUTONEG_DISABLE; 1147 1148 if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) { 1149 phylink_mac_config(pl, &pl->link_config); 1150 phylink_mac_an_restart(pl); 1151 } 1152 mutex_unlock(&pl->state_mutex); 1153 1154 return 0; 1155 } 1156 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set); 1157 1158 /** 1159 * phylink_ethtool_nway_reset() - restart negotiation 1160 * @pl: a pointer to a &struct phylink returned from phylink_create() 1161 * 1162 * Restart negotiation for the phylink instance specified by @pl. This will 1163 * cause any attached phy to restart negotiation with the link partner, and 1164 * if the MAC is in a BaseX mode, the MAC will also be requested to restart 1165 * negotiation. 1166 * 1167 * Returns zero on success, or negative error code. 1168 */ 1169 int phylink_ethtool_nway_reset(struct phylink *pl) 1170 { 1171 int ret = 0; 1172 1173 ASSERT_RTNL(); 1174 1175 if (pl->phydev) 1176 ret = phy_restart_aneg(pl->phydev); 1177 phylink_mac_an_restart(pl); 1178 1179 return ret; 1180 } 1181 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset); 1182 1183 /** 1184 * phylink_ethtool_get_pauseparam() - get the current pause parameters 1185 * @pl: a pointer to a &struct phylink returned from phylink_create() 1186 * @pause: a pointer to a &struct ethtool_pauseparam 1187 */ 1188 void phylink_ethtool_get_pauseparam(struct phylink *pl, 1189 struct ethtool_pauseparam *pause) 1190 { 1191 ASSERT_RTNL(); 1192 1193 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN); 1194 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX); 1195 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX); 1196 } 1197 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam); 1198 1199 /** 1200 * phylink_ethtool_set_pauseparam() - set the current pause parameters 1201 * @pl: a pointer to a &struct phylink returned from phylink_create() 1202 * @pause: a pointer to a &struct ethtool_pauseparam 1203 */ 1204 int phylink_ethtool_set_pauseparam(struct phylink *pl, 1205 struct ethtool_pauseparam *pause) 1206 { 1207 struct phylink_link_state *config = &pl->link_config; 1208 1209 ASSERT_RTNL(); 1210 1211 if (!phylink_test(pl->supported, Pause) && 1212 !phylink_test(pl->supported, Asym_Pause)) 1213 return -EOPNOTSUPP; 1214 1215 if (!phylink_test(pl->supported, Asym_Pause) && 1216 !pause->autoneg && pause->rx_pause != pause->tx_pause) 1217 return -EINVAL; 1218 1219 config->pause &= ~(MLO_PAUSE_AN | MLO_PAUSE_TXRX_MASK); 1220 1221 if (pause->autoneg) 1222 config->pause |= MLO_PAUSE_AN; 1223 if (pause->rx_pause) 1224 config->pause |= MLO_PAUSE_RX; 1225 if (pause->tx_pause) 1226 config->pause |= MLO_PAUSE_TX; 1227 1228 if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) { 1229 switch (pl->link_an_mode) { 1230 case MLO_AN_PHY: 1231 /* Silently mark the carrier down, and then trigger a resolve */ 1232 netif_carrier_off(pl->netdev); 1233 phylink_run_resolve(pl); 1234 break; 1235 1236 case MLO_AN_FIXED: 1237 /* Should we allow fixed links to change against the config? */ 1238 phylink_resolve_flow(pl, config); 1239 phylink_mac_config(pl, config); 1240 break; 1241 1242 case MLO_AN_INBAND: 1243 phylink_mac_config(pl, config); 1244 phylink_mac_an_restart(pl); 1245 break; 1246 } 1247 } 1248 1249 return 0; 1250 } 1251 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam); 1252 1253 /** 1254 * phylink_ethtool_get_eee_err() - read the energy efficient ethernet error 1255 * counter 1256 * @pl: a pointer to a &struct phylink returned from phylink_create(). 1257 * 1258 * Read the Energy Efficient Ethernet error counter from the PHY associated 1259 * with the phylink instance specified by @pl. 1260 * 1261 * Returns positive error counter value, or negative error code. 1262 */ 1263 int phylink_get_eee_err(struct phylink *pl) 1264 { 1265 int ret = 0; 1266 1267 ASSERT_RTNL(); 1268 1269 if (pl->phydev) 1270 ret = phy_get_eee_err(pl->phydev); 1271 1272 return ret; 1273 } 1274 EXPORT_SYMBOL_GPL(phylink_get_eee_err); 1275 1276 /** 1277 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters 1278 * @pl: a pointer to a &struct phylink returned from phylink_create() 1279 * @eee: a pointer to a &struct ethtool_eee for the read parameters 1280 */ 1281 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee) 1282 { 1283 int ret = -EOPNOTSUPP; 1284 1285 ASSERT_RTNL(); 1286 1287 if (pl->phydev) 1288 ret = phy_ethtool_get_eee(pl->phydev, eee); 1289 1290 return ret; 1291 } 1292 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee); 1293 1294 /** 1295 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters 1296 * @pl: a pointer to a &struct phylink returned from phylink_create() 1297 * @eee: a pointer to a &struct ethtool_eee for the desired parameters 1298 */ 1299 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee) 1300 { 1301 int ret = -EOPNOTSUPP; 1302 1303 ASSERT_RTNL(); 1304 1305 if (pl->phydev) 1306 ret = phy_ethtool_set_eee(pl->phydev, eee); 1307 1308 return ret; 1309 } 1310 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee); 1311 1312 /* This emulates MII registers for a fixed-mode phy operating as per the 1313 * passed in state. "aneg" defines if we report negotiation is possible. 1314 * 1315 * FIXME: should deal with negotiation state too. 1316 */ 1317 static int phylink_mii_emul_read(struct net_device *ndev, unsigned int reg, 1318 struct phylink_link_state *state, bool aneg) 1319 { 1320 struct fixed_phy_status fs; 1321 int val; 1322 1323 fs.link = state->link; 1324 fs.speed = state->speed; 1325 fs.duplex = state->duplex; 1326 fs.pause = state->pause & MLO_PAUSE_SYM; 1327 fs.asym_pause = state->pause & MLO_PAUSE_ASYM; 1328 1329 val = swphy_read_reg(reg, &fs); 1330 if (reg == MII_BMSR) { 1331 if (!state->an_complete) 1332 val &= ~BMSR_ANEGCOMPLETE; 1333 if (!aneg) 1334 val &= ~BMSR_ANEGCAPABLE; 1335 } 1336 return val; 1337 } 1338 1339 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id, 1340 unsigned int reg) 1341 { 1342 struct phy_device *phydev = pl->phydev; 1343 int prtad, devad; 1344 1345 if (mdio_phy_id_is_c45(phy_id)) { 1346 prtad = mdio_phy_id_prtad(phy_id); 1347 devad = mdio_phy_id_devad(phy_id); 1348 devad = MII_ADDR_C45 | devad << 16 | reg; 1349 } else if (phydev->is_c45) { 1350 switch (reg) { 1351 case MII_BMCR: 1352 case MII_BMSR: 1353 case MII_PHYSID1: 1354 case MII_PHYSID2: 1355 devad = __ffs(phydev->c45_ids.devices_in_package); 1356 break; 1357 case MII_ADVERTISE: 1358 case MII_LPA: 1359 if (!(phydev->c45_ids.devices_in_package & MDIO_DEVS_AN)) 1360 return -EINVAL; 1361 devad = MDIO_MMD_AN; 1362 if (reg == MII_ADVERTISE) 1363 reg = MDIO_AN_ADVERTISE; 1364 else 1365 reg = MDIO_AN_LPA; 1366 break; 1367 default: 1368 return -EINVAL; 1369 } 1370 prtad = phy_id; 1371 devad = MII_ADDR_C45 | devad << 16 | reg; 1372 } else { 1373 prtad = phy_id; 1374 devad = reg; 1375 } 1376 return mdiobus_read(pl->phydev->mdio.bus, prtad, devad); 1377 } 1378 1379 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id, 1380 unsigned int reg, unsigned int val) 1381 { 1382 struct phy_device *phydev = pl->phydev; 1383 int prtad, devad; 1384 1385 if (mdio_phy_id_is_c45(phy_id)) { 1386 prtad = mdio_phy_id_prtad(phy_id); 1387 devad = mdio_phy_id_devad(phy_id); 1388 devad = MII_ADDR_C45 | devad << 16 | reg; 1389 } else if (phydev->is_c45) { 1390 switch (reg) { 1391 case MII_BMCR: 1392 case MII_BMSR: 1393 case MII_PHYSID1: 1394 case MII_PHYSID2: 1395 devad = __ffs(phydev->c45_ids.devices_in_package); 1396 break; 1397 case MII_ADVERTISE: 1398 case MII_LPA: 1399 if (!(phydev->c45_ids.devices_in_package & MDIO_DEVS_AN)) 1400 return -EINVAL; 1401 devad = MDIO_MMD_AN; 1402 if (reg == MII_ADVERTISE) 1403 reg = MDIO_AN_ADVERTISE; 1404 else 1405 reg = MDIO_AN_LPA; 1406 break; 1407 default: 1408 return -EINVAL; 1409 } 1410 prtad = phy_id; 1411 devad = MII_ADDR_C45 | devad << 16 | reg; 1412 } else { 1413 prtad = phy_id; 1414 devad = reg; 1415 } 1416 1417 return mdiobus_write(phydev->mdio.bus, prtad, devad, val); 1418 } 1419 1420 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id, 1421 unsigned int reg) 1422 { 1423 struct phylink_link_state state; 1424 int val = 0xffff; 1425 1426 switch (pl->link_an_mode) { 1427 case MLO_AN_FIXED: 1428 if (phy_id == 0) { 1429 phylink_get_fixed_state(pl, &state); 1430 val = phylink_mii_emul_read(pl->netdev, reg, &state, 1431 true); 1432 } 1433 break; 1434 1435 case MLO_AN_PHY: 1436 return -EOPNOTSUPP; 1437 1438 case MLO_AN_INBAND: 1439 if (phy_id == 0) { 1440 val = phylink_get_mac_state(pl, &state); 1441 if (val < 0) 1442 return val; 1443 1444 val = phylink_mii_emul_read(pl->netdev, reg, &state, 1445 true); 1446 } 1447 break; 1448 } 1449 1450 return val & 0xffff; 1451 } 1452 1453 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id, 1454 unsigned int reg, unsigned int val) 1455 { 1456 switch (pl->link_an_mode) { 1457 case MLO_AN_FIXED: 1458 break; 1459 1460 case MLO_AN_PHY: 1461 return -EOPNOTSUPP; 1462 1463 case MLO_AN_INBAND: 1464 break; 1465 } 1466 1467 return 0; 1468 } 1469 1470 /** 1471 * phylink_mii_ioctl() - generic mii ioctl interface 1472 * @pl: a pointer to a &struct phylink returned from phylink_create() 1473 * @ifr: a pointer to a &struct ifreq for socket ioctls 1474 * @cmd: ioctl cmd to execute 1475 * 1476 * Perform the specified MII ioctl on the PHY attached to the phylink instance 1477 * specified by @pl. If no PHY is attached, emulate the presence of the PHY. 1478 * 1479 * Returns: zero on success or negative error code. 1480 * 1481 * %SIOCGMIIPHY: 1482 * read register from the current PHY. 1483 * %SIOCGMIIREG: 1484 * read register from the specified PHY. 1485 * %SIOCSMIIREG: 1486 * set a register on the specified PHY. 1487 */ 1488 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd) 1489 { 1490 struct mii_ioctl_data *mii = if_mii(ifr); 1491 int ret; 1492 1493 ASSERT_RTNL(); 1494 1495 if (pl->phydev) { 1496 /* PHYs only exist for MLO_AN_PHY and SGMII */ 1497 switch (cmd) { 1498 case SIOCGMIIPHY: 1499 mii->phy_id = pl->phydev->mdio.addr; 1500 /* fall through */ 1501 1502 case SIOCGMIIREG: 1503 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num); 1504 if (ret >= 0) { 1505 mii->val_out = ret; 1506 ret = 0; 1507 } 1508 break; 1509 1510 case SIOCSMIIREG: 1511 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num, 1512 mii->val_in); 1513 break; 1514 1515 default: 1516 ret = phy_mii_ioctl(pl->phydev, ifr, cmd); 1517 break; 1518 } 1519 } else { 1520 switch (cmd) { 1521 case SIOCGMIIPHY: 1522 mii->phy_id = 0; 1523 /* fall through */ 1524 1525 case SIOCGMIIREG: 1526 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num); 1527 if (ret >= 0) { 1528 mii->val_out = ret; 1529 ret = 0; 1530 } 1531 break; 1532 1533 case SIOCSMIIREG: 1534 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num, 1535 mii->val_in); 1536 break; 1537 1538 default: 1539 ret = -EOPNOTSUPP; 1540 break; 1541 } 1542 } 1543 1544 return ret; 1545 } 1546 EXPORT_SYMBOL_GPL(phylink_mii_ioctl); 1547 1548 static int phylink_sfp_module_insert(void *upstream, 1549 const struct sfp_eeprom_id *id) 1550 { 1551 struct phylink *pl = upstream; 1552 __ETHTOOL_DECLARE_LINK_MODE_MASK(support) = { 0, }; 1553 struct phylink_link_state config; 1554 phy_interface_t iface; 1555 int ret = 0; 1556 bool changed; 1557 u8 port; 1558 1559 ASSERT_RTNL(); 1560 1561 sfp_parse_support(pl->sfp_bus, id, support); 1562 port = sfp_parse_port(pl->sfp_bus, id, support); 1563 1564 memset(&config, 0, sizeof(config)); 1565 linkmode_copy(config.advertising, support); 1566 config.interface = PHY_INTERFACE_MODE_NA; 1567 config.speed = SPEED_UNKNOWN; 1568 config.duplex = DUPLEX_UNKNOWN; 1569 config.pause = MLO_PAUSE_AN; 1570 config.an_enabled = pl->link_config.an_enabled; 1571 1572 /* Ignore errors if we're expecting a PHY to attach later */ 1573 ret = phylink_validate(pl, support, &config); 1574 if (ret) { 1575 netdev_err(pl->netdev, "validation with support %*pb failed: %d\n", 1576 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret); 1577 return ret; 1578 } 1579 1580 iface = sfp_select_interface(pl->sfp_bus, id, config.advertising); 1581 if (iface == PHY_INTERFACE_MODE_NA) { 1582 netdev_err(pl->netdev, 1583 "selection of interface failed, advertisement %*pb\n", 1584 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising); 1585 return -EINVAL; 1586 } 1587 1588 config.interface = iface; 1589 ret = phylink_validate(pl, support, &config); 1590 if (ret) { 1591 netdev_err(pl->netdev, "validation of %s/%s with support %*pb failed: %d\n", 1592 phylink_an_mode_str(MLO_AN_INBAND), 1593 phy_modes(config.interface), 1594 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret); 1595 return ret; 1596 } 1597 1598 netdev_dbg(pl->netdev, "requesting link mode %s/%s with support %*pb\n", 1599 phylink_an_mode_str(MLO_AN_INBAND), 1600 phy_modes(config.interface), 1601 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 1602 1603 if (phy_interface_mode_is_8023z(iface) && pl->phydev) 1604 return -EINVAL; 1605 1606 changed = !bitmap_equal(pl->supported, support, 1607 __ETHTOOL_LINK_MODE_MASK_NBITS); 1608 if (changed) { 1609 linkmode_copy(pl->supported, support); 1610 linkmode_copy(pl->link_config.advertising, config.advertising); 1611 } 1612 1613 if (pl->link_an_mode != MLO_AN_INBAND || 1614 pl->link_config.interface != config.interface) { 1615 pl->link_config.interface = config.interface; 1616 pl->link_an_mode = MLO_AN_INBAND; 1617 1618 changed = true; 1619 1620 netdev_info(pl->netdev, "switched to %s/%s link mode\n", 1621 phylink_an_mode_str(MLO_AN_INBAND), 1622 phy_modes(config.interface)); 1623 } 1624 1625 pl->link_port = port; 1626 1627 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED, 1628 &pl->phylink_disable_state)) 1629 phylink_mac_config(pl, &pl->link_config); 1630 1631 return ret; 1632 } 1633 1634 static void phylink_sfp_link_down(void *upstream) 1635 { 1636 struct phylink *pl = upstream; 1637 1638 ASSERT_RTNL(); 1639 1640 set_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state); 1641 queue_work(system_power_efficient_wq, &pl->resolve); 1642 flush_work(&pl->resolve); 1643 } 1644 1645 static void phylink_sfp_link_up(void *upstream) 1646 { 1647 struct phylink *pl = upstream; 1648 1649 ASSERT_RTNL(); 1650 1651 clear_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state); 1652 phylink_run_resolve(pl); 1653 } 1654 1655 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy) 1656 { 1657 return phylink_connect_phy(upstream, phy); 1658 } 1659 1660 static void phylink_sfp_disconnect_phy(void *upstream) 1661 { 1662 phylink_disconnect_phy(upstream); 1663 } 1664 1665 static const struct sfp_upstream_ops sfp_phylink_ops = { 1666 .module_insert = phylink_sfp_module_insert, 1667 .link_up = phylink_sfp_link_up, 1668 .link_down = phylink_sfp_link_down, 1669 .connect_phy = phylink_sfp_connect_phy, 1670 .disconnect_phy = phylink_sfp_disconnect_phy, 1671 }; 1672 1673 MODULE_LICENSE("GPL"); 1674