1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * phylink models the MAC to optional PHY connection, supporting 4 * technologies such as SFP cages where the PHY is hot-pluggable. 5 * 6 * Copyright (C) 2015 Russell King 7 */ 8 #include <linux/acpi.h> 9 #include <linux/ethtool.h> 10 #include <linux/export.h> 11 #include <linux/gpio/consumer.h> 12 #include <linux/netdevice.h> 13 #include <linux/of.h> 14 #include <linux/of_mdio.h> 15 #include <linux/phy.h> 16 #include <linux/phy_fixed.h> 17 #include <linux/phylink.h> 18 #include <linux/rtnetlink.h> 19 #include <linux/spinlock.h> 20 #include <linux/timer.h> 21 #include <linux/workqueue.h> 22 23 #include "sfp.h" 24 #include "swphy.h" 25 26 #define SUPPORTED_INTERFACES \ 27 (SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE | \ 28 SUPPORTED_BNC | SUPPORTED_AUI | SUPPORTED_Backplane) 29 #define ADVERTISED_INTERFACES \ 30 (ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \ 31 ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane) 32 33 enum { 34 PHYLINK_DISABLE_STOPPED, 35 PHYLINK_DISABLE_LINK, 36 }; 37 38 /** 39 * struct phylink - internal data type for phylink 40 */ 41 struct phylink { 42 /* private: */ 43 struct net_device *netdev; 44 const struct phylink_mac_ops *mac_ops; 45 const struct phylink_pcs_ops *pcs_ops; 46 struct phylink_config *config; 47 struct phylink_pcs *pcs; 48 struct device *dev; 49 unsigned int old_link_state:1; 50 51 unsigned long phylink_disable_state; /* bitmask of disables */ 52 struct phy_device *phydev; 53 phy_interface_t link_interface; /* PHY_INTERFACE_xxx */ 54 u8 cfg_link_an_mode; /* MLO_AN_xxx */ 55 u8 cur_link_an_mode; 56 u8 link_port; /* The current non-phy ethtool port */ 57 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 58 59 /* The link configuration settings */ 60 struct phylink_link_state link_config; 61 62 /* The current settings */ 63 phy_interface_t cur_interface; 64 65 struct gpio_desc *link_gpio; 66 unsigned int link_irq; 67 struct timer_list link_poll; 68 void (*get_fixed_state)(struct net_device *dev, 69 struct phylink_link_state *s); 70 71 struct mutex state_mutex; 72 struct phylink_link_state phy_state; 73 struct work_struct resolve; 74 75 bool mac_link_dropped; 76 77 struct sfp_bus *sfp_bus; 78 bool sfp_may_have_phy; 79 __ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support); 80 u8 sfp_port; 81 }; 82 83 #define phylink_printk(level, pl, fmt, ...) \ 84 do { \ 85 if ((pl)->config->type == PHYLINK_NETDEV) \ 86 netdev_printk(level, (pl)->netdev, fmt, ##__VA_ARGS__); \ 87 else if ((pl)->config->type == PHYLINK_DEV) \ 88 dev_printk(level, (pl)->dev, fmt, ##__VA_ARGS__); \ 89 } while (0) 90 91 #define phylink_err(pl, fmt, ...) \ 92 phylink_printk(KERN_ERR, pl, fmt, ##__VA_ARGS__) 93 #define phylink_warn(pl, fmt, ...) \ 94 phylink_printk(KERN_WARNING, pl, fmt, ##__VA_ARGS__) 95 #define phylink_info(pl, fmt, ...) \ 96 phylink_printk(KERN_INFO, pl, fmt, ##__VA_ARGS__) 97 #if defined(CONFIG_DYNAMIC_DEBUG) 98 #define phylink_dbg(pl, fmt, ...) \ 99 do { \ 100 if ((pl)->config->type == PHYLINK_NETDEV) \ 101 netdev_dbg((pl)->netdev, fmt, ##__VA_ARGS__); \ 102 else if ((pl)->config->type == PHYLINK_DEV) \ 103 dev_dbg((pl)->dev, fmt, ##__VA_ARGS__); \ 104 } while (0) 105 #elif defined(DEBUG) 106 #define phylink_dbg(pl, fmt, ...) \ 107 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__) 108 #else 109 #define phylink_dbg(pl, fmt, ...) \ 110 ({ \ 111 if (0) \ 112 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__); \ 113 }) 114 #endif 115 116 /** 117 * phylink_set_port_modes() - set the port type modes in the ethtool mask 118 * @mask: ethtool link mode mask 119 * 120 * Sets all the port type modes in the ethtool mask. MAC drivers should 121 * use this in their 'validate' callback. 122 */ 123 void phylink_set_port_modes(unsigned long *mask) 124 { 125 phylink_set(mask, TP); 126 phylink_set(mask, AUI); 127 phylink_set(mask, MII); 128 phylink_set(mask, FIBRE); 129 phylink_set(mask, BNC); 130 phylink_set(mask, Backplane); 131 } 132 EXPORT_SYMBOL_GPL(phylink_set_port_modes); 133 134 static int phylink_is_empty_linkmode(const unsigned long *linkmode) 135 { 136 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, }; 137 138 phylink_set_port_modes(tmp); 139 phylink_set(tmp, Autoneg); 140 phylink_set(tmp, Pause); 141 phylink_set(tmp, Asym_Pause); 142 143 return linkmode_subset(linkmode, tmp); 144 } 145 146 static const char *phylink_an_mode_str(unsigned int mode) 147 { 148 static const char *modestr[] = { 149 [MLO_AN_PHY] = "phy", 150 [MLO_AN_FIXED] = "fixed", 151 [MLO_AN_INBAND] = "inband", 152 }; 153 154 return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown"; 155 } 156 157 static int phylink_validate(struct phylink *pl, unsigned long *supported, 158 struct phylink_link_state *state) 159 { 160 pl->mac_ops->validate(pl->config, supported, state); 161 162 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; 163 } 164 165 static int phylink_parse_fixedlink(struct phylink *pl, 166 struct fwnode_handle *fwnode) 167 { 168 struct fwnode_handle *fixed_node; 169 const struct phy_setting *s; 170 struct gpio_desc *desc; 171 u32 speed; 172 int ret; 173 174 fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link"); 175 if (fixed_node) { 176 ret = fwnode_property_read_u32(fixed_node, "speed", &speed); 177 178 pl->link_config.speed = speed; 179 pl->link_config.duplex = DUPLEX_HALF; 180 181 if (fwnode_property_read_bool(fixed_node, "full-duplex")) 182 pl->link_config.duplex = DUPLEX_FULL; 183 184 /* We treat the "pause" and "asym-pause" terminology as 185 * defining the link partner's ability. 186 */ 187 if (fwnode_property_read_bool(fixed_node, "pause")) 188 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 189 pl->link_config.lp_advertising); 190 if (fwnode_property_read_bool(fixed_node, "asym-pause")) 191 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 192 pl->link_config.lp_advertising); 193 194 if (ret == 0) { 195 desc = fwnode_gpiod_get_index(fixed_node, "link", 0, 196 GPIOD_IN, "?"); 197 198 if (!IS_ERR(desc)) 199 pl->link_gpio = desc; 200 else if (desc == ERR_PTR(-EPROBE_DEFER)) 201 ret = -EPROBE_DEFER; 202 } 203 fwnode_handle_put(fixed_node); 204 205 if (ret) 206 return ret; 207 } else { 208 u32 prop[5]; 209 210 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 211 NULL, 0); 212 if (ret != ARRAY_SIZE(prop)) { 213 phylink_err(pl, "broken fixed-link?\n"); 214 return -EINVAL; 215 } 216 217 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 218 prop, ARRAY_SIZE(prop)); 219 if (!ret) { 220 pl->link_config.duplex = prop[1] ? 221 DUPLEX_FULL : DUPLEX_HALF; 222 pl->link_config.speed = prop[2]; 223 if (prop[3]) 224 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 225 pl->link_config.lp_advertising); 226 if (prop[4]) 227 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 228 pl->link_config.lp_advertising); 229 } 230 } 231 232 if (pl->link_config.speed > SPEED_1000 && 233 pl->link_config.duplex != DUPLEX_FULL) 234 phylink_warn(pl, "fixed link specifies half duplex for %dMbps link?\n", 235 pl->link_config.speed); 236 237 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 238 linkmode_copy(pl->link_config.advertising, pl->supported); 239 phylink_validate(pl, pl->supported, &pl->link_config); 240 241 s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex, 242 pl->supported, true); 243 linkmode_zero(pl->supported); 244 phylink_set(pl->supported, MII); 245 phylink_set(pl->supported, Pause); 246 phylink_set(pl->supported, Asym_Pause); 247 phylink_set(pl->supported, Autoneg); 248 if (s) { 249 __set_bit(s->bit, pl->supported); 250 __set_bit(s->bit, pl->link_config.lp_advertising); 251 } else { 252 phylink_warn(pl, "fixed link %s duplex %dMbps not recognised\n", 253 pl->link_config.duplex == DUPLEX_FULL ? "full" : "half", 254 pl->link_config.speed); 255 } 256 257 linkmode_and(pl->link_config.advertising, pl->link_config.advertising, 258 pl->supported); 259 260 pl->link_config.link = 1; 261 pl->link_config.an_complete = 1; 262 263 return 0; 264 } 265 266 static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode) 267 { 268 struct fwnode_handle *dn; 269 const char *managed; 270 271 dn = fwnode_get_named_child_node(fwnode, "fixed-link"); 272 if (dn || fwnode_property_present(fwnode, "fixed-link")) 273 pl->cfg_link_an_mode = MLO_AN_FIXED; 274 fwnode_handle_put(dn); 275 276 if ((fwnode_property_read_string(fwnode, "managed", &managed) == 0 && 277 strcmp(managed, "in-band-status") == 0) || 278 pl->config->ovr_an_inband) { 279 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 280 phylink_err(pl, 281 "can't use both fixed-link and in-band-status\n"); 282 return -EINVAL; 283 } 284 285 linkmode_zero(pl->supported); 286 phylink_set(pl->supported, MII); 287 phylink_set(pl->supported, Autoneg); 288 phylink_set(pl->supported, Asym_Pause); 289 phylink_set(pl->supported, Pause); 290 pl->link_config.an_enabled = true; 291 pl->cfg_link_an_mode = MLO_AN_INBAND; 292 293 switch (pl->link_config.interface) { 294 case PHY_INTERFACE_MODE_SGMII: 295 case PHY_INTERFACE_MODE_QSGMII: 296 phylink_set(pl->supported, 10baseT_Half); 297 phylink_set(pl->supported, 10baseT_Full); 298 phylink_set(pl->supported, 100baseT_Half); 299 phylink_set(pl->supported, 100baseT_Full); 300 phylink_set(pl->supported, 1000baseT_Half); 301 phylink_set(pl->supported, 1000baseT_Full); 302 break; 303 304 case PHY_INTERFACE_MODE_1000BASEX: 305 phylink_set(pl->supported, 1000baseX_Full); 306 break; 307 308 case PHY_INTERFACE_MODE_2500BASEX: 309 phylink_set(pl->supported, 2500baseX_Full); 310 break; 311 312 case PHY_INTERFACE_MODE_5GBASER: 313 phylink_set(pl->supported, 5000baseT_Full); 314 break; 315 316 case PHY_INTERFACE_MODE_25GBASER: 317 phylink_set(pl->supported, 25000baseCR_Full); 318 phylink_set(pl->supported, 25000baseKR_Full); 319 phylink_set(pl->supported, 25000baseSR_Full); 320 fallthrough; 321 case PHY_INTERFACE_MODE_USXGMII: 322 case PHY_INTERFACE_MODE_10GKR: 323 case PHY_INTERFACE_MODE_10GBASER: 324 phylink_set(pl->supported, 10baseT_Half); 325 phylink_set(pl->supported, 10baseT_Full); 326 phylink_set(pl->supported, 100baseT_Half); 327 phylink_set(pl->supported, 100baseT_Full); 328 phylink_set(pl->supported, 1000baseT_Half); 329 phylink_set(pl->supported, 1000baseT_Full); 330 phylink_set(pl->supported, 1000baseX_Full); 331 phylink_set(pl->supported, 1000baseKX_Full); 332 phylink_set(pl->supported, 2500baseT_Full); 333 phylink_set(pl->supported, 2500baseX_Full); 334 phylink_set(pl->supported, 5000baseT_Full); 335 phylink_set(pl->supported, 10000baseT_Full); 336 phylink_set(pl->supported, 10000baseKR_Full); 337 phylink_set(pl->supported, 10000baseKX4_Full); 338 phylink_set(pl->supported, 10000baseCR_Full); 339 phylink_set(pl->supported, 10000baseSR_Full); 340 phylink_set(pl->supported, 10000baseLR_Full); 341 phylink_set(pl->supported, 10000baseLRM_Full); 342 phylink_set(pl->supported, 10000baseER_Full); 343 break; 344 345 case PHY_INTERFACE_MODE_XLGMII: 346 phylink_set(pl->supported, 25000baseCR_Full); 347 phylink_set(pl->supported, 25000baseKR_Full); 348 phylink_set(pl->supported, 25000baseSR_Full); 349 phylink_set(pl->supported, 40000baseKR4_Full); 350 phylink_set(pl->supported, 40000baseCR4_Full); 351 phylink_set(pl->supported, 40000baseSR4_Full); 352 phylink_set(pl->supported, 40000baseLR4_Full); 353 phylink_set(pl->supported, 50000baseCR2_Full); 354 phylink_set(pl->supported, 50000baseKR2_Full); 355 phylink_set(pl->supported, 50000baseSR2_Full); 356 phylink_set(pl->supported, 50000baseKR_Full); 357 phylink_set(pl->supported, 50000baseSR_Full); 358 phylink_set(pl->supported, 50000baseCR_Full); 359 phylink_set(pl->supported, 50000baseLR_ER_FR_Full); 360 phylink_set(pl->supported, 50000baseDR_Full); 361 phylink_set(pl->supported, 100000baseKR4_Full); 362 phylink_set(pl->supported, 100000baseSR4_Full); 363 phylink_set(pl->supported, 100000baseCR4_Full); 364 phylink_set(pl->supported, 100000baseLR4_ER4_Full); 365 phylink_set(pl->supported, 100000baseKR2_Full); 366 phylink_set(pl->supported, 100000baseSR2_Full); 367 phylink_set(pl->supported, 100000baseCR2_Full); 368 phylink_set(pl->supported, 100000baseLR2_ER2_FR2_Full); 369 phylink_set(pl->supported, 100000baseDR2_Full); 370 break; 371 372 default: 373 phylink_err(pl, 374 "incorrect link mode %s for in-band status\n", 375 phy_modes(pl->link_config.interface)); 376 return -EINVAL; 377 } 378 379 linkmode_copy(pl->link_config.advertising, pl->supported); 380 381 if (phylink_validate(pl, pl->supported, &pl->link_config)) { 382 phylink_err(pl, 383 "failed to validate link configuration for in-band status\n"); 384 return -EINVAL; 385 } 386 387 /* Check if MAC/PCS also supports Autoneg. */ 388 pl->link_config.an_enabled = phylink_test(pl->supported, Autoneg); 389 } 390 391 return 0; 392 } 393 394 static void phylink_apply_manual_flow(struct phylink *pl, 395 struct phylink_link_state *state) 396 { 397 /* If autoneg is disabled, pause AN is also disabled */ 398 if (!state->an_enabled) 399 state->pause &= ~MLO_PAUSE_AN; 400 401 /* Manual configuration of pause modes */ 402 if (!(pl->link_config.pause & MLO_PAUSE_AN)) 403 state->pause = pl->link_config.pause; 404 } 405 406 static void phylink_resolve_flow(struct phylink_link_state *state) 407 { 408 bool tx_pause, rx_pause; 409 410 state->pause = MLO_PAUSE_NONE; 411 if (state->duplex == DUPLEX_FULL) { 412 linkmode_resolve_pause(state->advertising, 413 state->lp_advertising, 414 &tx_pause, &rx_pause); 415 if (tx_pause) 416 state->pause |= MLO_PAUSE_TX; 417 if (rx_pause) 418 state->pause |= MLO_PAUSE_RX; 419 } 420 } 421 422 static void phylink_mac_config(struct phylink *pl, 423 const struct phylink_link_state *state) 424 { 425 phylink_dbg(pl, 426 "%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n", 427 __func__, phylink_an_mode_str(pl->cur_link_an_mode), 428 phy_modes(state->interface), 429 phy_speed_to_str(state->speed), 430 phy_duplex_to_str(state->duplex), 431 __ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising, 432 state->pause, state->link, state->an_enabled); 433 434 pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, state); 435 } 436 437 static void phylink_mac_pcs_an_restart(struct phylink *pl) 438 { 439 if (pl->link_config.an_enabled && 440 phy_interface_mode_is_8023z(pl->link_config.interface) && 441 phylink_autoneg_inband(pl->cur_link_an_mode)) { 442 if (pl->pcs_ops) 443 pl->pcs_ops->pcs_an_restart(pl->pcs); 444 else 445 pl->mac_ops->mac_an_restart(pl->config); 446 } 447 } 448 449 static void phylink_major_config(struct phylink *pl, bool restart, 450 const struct phylink_link_state *state) 451 { 452 int err; 453 454 phylink_dbg(pl, "major config %s\n", phy_modes(state->interface)); 455 456 if (pl->mac_ops->mac_prepare) { 457 err = pl->mac_ops->mac_prepare(pl->config, pl->cur_link_an_mode, 458 state->interface); 459 if (err < 0) { 460 phylink_err(pl, "mac_prepare failed: %pe\n", 461 ERR_PTR(err)); 462 return; 463 } 464 } 465 466 phylink_mac_config(pl, state); 467 468 if (pl->pcs_ops) { 469 err = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode, 470 state->interface, 471 state->advertising, 472 !!(pl->link_config.pause & 473 MLO_PAUSE_AN)); 474 if (err < 0) 475 phylink_err(pl, "pcs_config failed: %pe\n", 476 ERR_PTR(err)); 477 if (err > 0) 478 restart = true; 479 } 480 if (restart) 481 phylink_mac_pcs_an_restart(pl); 482 483 if (pl->mac_ops->mac_finish) { 484 err = pl->mac_ops->mac_finish(pl->config, pl->cur_link_an_mode, 485 state->interface); 486 if (err < 0) 487 phylink_err(pl, "mac_finish failed: %pe\n", 488 ERR_PTR(err)); 489 } 490 } 491 492 /* 493 * Reconfigure for a change of inband advertisement. 494 * If we have a separate PCS, we only need to call its pcs_config() method, 495 * and then restart AN if it indicates something changed. Otherwise, we do 496 * the full MAC reconfiguration. 497 */ 498 static int phylink_change_inband_advert(struct phylink *pl) 499 { 500 int ret; 501 502 if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) 503 return 0; 504 505 if (!pl->pcs_ops) { 506 /* Legacy method */ 507 phylink_mac_config(pl, &pl->link_config); 508 phylink_mac_pcs_an_restart(pl); 509 return 0; 510 } 511 512 phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__, 513 phylink_an_mode_str(pl->cur_link_an_mode), 514 phy_modes(pl->link_config.interface), 515 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->link_config.advertising, 516 pl->link_config.pause); 517 518 /* Modern PCS-based method; update the advert at the PCS, and 519 * restart negotiation if the pcs_config() helper indicates that 520 * the programmed advertisement has changed. 521 */ 522 ret = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode, 523 pl->link_config.interface, 524 pl->link_config.advertising, 525 !!(pl->link_config.pause & MLO_PAUSE_AN)); 526 if (ret < 0) 527 return ret; 528 529 if (ret > 0) 530 phylink_mac_pcs_an_restart(pl); 531 532 return 0; 533 } 534 535 static void phylink_mac_pcs_get_state(struct phylink *pl, 536 struct phylink_link_state *state) 537 { 538 linkmode_copy(state->advertising, pl->link_config.advertising); 539 linkmode_zero(state->lp_advertising); 540 state->interface = pl->link_config.interface; 541 state->an_enabled = pl->link_config.an_enabled; 542 state->speed = SPEED_UNKNOWN; 543 state->duplex = DUPLEX_UNKNOWN; 544 state->pause = MLO_PAUSE_NONE; 545 state->an_complete = 0; 546 state->link = 1; 547 548 if (pl->pcs_ops) 549 pl->pcs_ops->pcs_get_state(pl->pcs, state); 550 else if (pl->mac_ops->mac_pcs_get_state) 551 pl->mac_ops->mac_pcs_get_state(pl->config, state); 552 else 553 state->link = 0; 554 } 555 556 /* The fixed state is... fixed except for the link state, 557 * which may be determined by a GPIO or a callback. 558 */ 559 static void phylink_get_fixed_state(struct phylink *pl, 560 struct phylink_link_state *state) 561 { 562 *state = pl->link_config; 563 if (pl->config->get_fixed_state) 564 pl->config->get_fixed_state(pl->config, state); 565 else if (pl->link_gpio) 566 state->link = !!gpiod_get_value_cansleep(pl->link_gpio); 567 568 phylink_resolve_flow(state); 569 } 570 571 static void phylink_mac_initial_config(struct phylink *pl, bool force_restart) 572 { 573 struct phylink_link_state link_state; 574 575 switch (pl->cur_link_an_mode) { 576 case MLO_AN_PHY: 577 link_state = pl->phy_state; 578 break; 579 580 case MLO_AN_FIXED: 581 phylink_get_fixed_state(pl, &link_state); 582 break; 583 584 case MLO_AN_INBAND: 585 link_state = pl->link_config; 586 if (link_state.interface == PHY_INTERFACE_MODE_SGMII) 587 link_state.pause = MLO_PAUSE_NONE; 588 break; 589 590 default: /* can't happen */ 591 return; 592 } 593 594 link_state.link = false; 595 596 phylink_apply_manual_flow(pl, &link_state); 597 phylink_major_config(pl, force_restart, &link_state); 598 } 599 600 static const char *phylink_pause_to_str(int pause) 601 { 602 switch (pause & MLO_PAUSE_TXRX_MASK) { 603 case MLO_PAUSE_TX | MLO_PAUSE_RX: 604 return "rx/tx"; 605 case MLO_PAUSE_TX: 606 return "tx"; 607 case MLO_PAUSE_RX: 608 return "rx"; 609 default: 610 return "off"; 611 } 612 } 613 614 static void phylink_link_up(struct phylink *pl, 615 struct phylink_link_state link_state) 616 { 617 struct net_device *ndev = pl->netdev; 618 619 pl->cur_interface = link_state.interface; 620 621 if (pl->pcs_ops && pl->pcs_ops->pcs_link_up) 622 pl->pcs_ops->pcs_link_up(pl->pcs, pl->cur_link_an_mode, 623 pl->cur_interface, 624 link_state.speed, link_state.duplex); 625 626 pl->mac_ops->mac_link_up(pl->config, pl->phydev, 627 pl->cur_link_an_mode, pl->cur_interface, 628 link_state.speed, link_state.duplex, 629 !!(link_state.pause & MLO_PAUSE_TX), 630 !!(link_state.pause & MLO_PAUSE_RX)); 631 632 if (ndev) 633 netif_carrier_on(ndev); 634 635 phylink_info(pl, 636 "Link is Up - %s/%s - flow control %s\n", 637 phy_speed_to_str(link_state.speed), 638 phy_duplex_to_str(link_state.duplex), 639 phylink_pause_to_str(link_state.pause)); 640 } 641 642 static void phylink_link_down(struct phylink *pl) 643 { 644 struct net_device *ndev = pl->netdev; 645 646 if (ndev) 647 netif_carrier_off(ndev); 648 pl->mac_ops->mac_link_down(pl->config, pl->cur_link_an_mode, 649 pl->cur_interface); 650 phylink_info(pl, "Link is Down\n"); 651 } 652 653 static void phylink_resolve(struct work_struct *w) 654 { 655 struct phylink *pl = container_of(w, struct phylink, resolve); 656 struct phylink_link_state link_state; 657 struct net_device *ndev = pl->netdev; 658 bool mac_config = false; 659 bool cur_link_state; 660 661 mutex_lock(&pl->state_mutex); 662 if (pl->netdev) 663 cur_link_state = netif_carrier_ok(ndev); 664 else 665 cur_link_state = pl->old_link_state; 666 667 if (pl->phylink_disable_state) { 668 pl->mac_link_dropped = false; 669 link_state.link = false; 670 } else if (pl->mac_link_dropped) { 671 link_state.link = false; 672 } else { 673 switch (pl->cur_link_an_mode) { 674 case MLO_AN_PHY: 675 link_state = pl->phy_state; 676 phylink_apply_manual_flow(pl, &link_state); 677 mac_config = link_state.link; 678 break; 679 680 case MLO_AN_FIXED: 681 phylink_get_fixed_state(pl, &link_state); 682 mac_config = link_state.link; 683 break; 684 685 case MLO_AN_INBAND: 686 phylink_mac_pcs_get_state(pl, &link_state); 687 688 /* If we have a phy, the "up" state is the union of 689 * both the PHY and the MAC 690 */ 691 if (pl->phydev) 692 link_state.link &= pl->phy_state.link; 693 694 /* Only update if the PHY link is up */ 695 if (pl->phydev && pl->phy_state.link) { 696 link_state.interface = pl->phy_state.interface; 697 698 /* If we have a PHY, we need to update with 699 * the PHY flow control bits. 700 */ 701 link_state.pause = pl->phy_state.pause; 702 mac_config = true; 703 } 704 phylink_apply_manual_flow(pl, &link_state); 705 break; 706 } 707 } 708 709 if (mac_config) { 710 if (link_state.interface != pl->link_config.interface) { 711 /* The interface has changed, force the link down and 712 * then reconfigure. 713 */ 714 if (cur_link_state) { 715 phylink_link_down(pl); 716 cur_link_state = false; 717 } 718 phylink_major_config(pl, false, &link_state); 719 pl->link_config.interface = link_state.interface; 720 } else if (!pl->pcs_ops) { 721 /* The interface remains unchanged, only the speed, 722 * duplex or pause settings have changed. Call the 723 * old mac_config() method to configure the MAC/PCS 724 * only if we do not have a PCS installed (an 725 * unconverted user.) 726 */ 727 phylink_mac_config(pl, &link_state); 728 } 729 } 730 731 if (link_state.link != cur_link_state) { 732 pl->old_link_state = link_state.link; 733 if (!link_state.link) 734 phylink_link_down(pl); 735 else 736 phylink_link_up(pl, link_state); 737 } 738 if (!link_state.link && pl->mac_link_dropped) { 739 pl->mac_link_dropped = false; 740 queue_work(system_power_efficient_wq, &pl->resolve); 741 } 742 mutex_unlock(&pl->state_mutex); 743 } 744 745 static void phylink_run_resolve(struct phylink *pl) 746 { 747 if (!pl->phylink_disable_state) 748 queue_work(system_power_efficient_wq, &pl->resolve); 749 } 750 751 static void phylink_run_resolve_and_disable(struct phylink *pl, int bit) 752 { 753 unsigned long state = pl->phylink_disable_state; 754 755 set_bit(bit, &pl->phylink_disable_state); 756 if (state == 0) { 757 queue_work(system_power_efficient_wq, &pl->resolve); 758 flush_work(&pl->resolve); 759 } 760 } 761 762 static void phylink_fixed_poll(struct timer_list *t) 763 { 764 struct phylink *pl = container_of(t, struct phylink, link_poll); 765 766 mod_timer(t, jiffies + HZ); 767 768 phylink_run_resolve(pl); 769 } 770 771 static const struct sfp_upstream_ops sfp_phylink_ops; 772 773 static int phylink_register_sfp(struct phylink *pl, 774 struct fwnode_handle *fwnode) 775 { 776 struct sfp_bus *bus; 777 int ret; 778 779 if (!fwnode) 780 return 0; 781 782 bus = sfp_bus_find_fwnode(fwnode); 783 if (IS_ERR(bus)) { 784 ret = PTR_ERR(bus); 785 phylink_err(pl, "unable to attach SFP bus: %d\n", ret); 786 return ret; 787 } 788 789 pl->sfp_bus = bus; 790 791 ret = sfp_bus_add_upstream(bus, pl, &sfp_phylink_ops); 792 sfp_bus_put(bus); 793 794 return ret; 795 } 796 797 /** 798 * phylink_create() - create a phylink instance 799 * @config: a pointer to the target &struct phylink_config 800 * @fwnode: a pointer to a &struct fwnode_handle describing the network 801 * interface 802 * @iface: the desired link mode defined by &typedef phy_interface_t 803 * @mac_ops: a pointer to a &struct phylink_mac_ops for the MAC. 804 * 805 * Create a new phylink instance, and parse the link parameters found in @np. 806 * This will parse in-band modes, fixed-link or SFP configuration. 807 * 808 * Note: the rtnl lock must not be held when calling this function. 809 * 810 * Returns a pointer to a &struct phylink, or an error-pointer value. Users 811 * must use IS_ERR() to check for errors from this function. 812 */ 813 struct phylink *phylink_create(struct phylink_config *config, 814 struct fwnode_handle *fwnode, 815 phy_interface_t iface, 816 const struct phylink_mac_ops *mac_ops) 817 { 818 struct phylink *pl; 819 int ret; 820 821 pl = kzalloc(sizeof(*pl), GFP_KERNEL); 822 if (!pl) 823 return ERR_PTR(-ENOMEM); 824 825 mutex_init(&pl->state_mutex); 826 INIT_WORK(&pl->resolve, phylink_resolve); 827 828 pl->config = config; 829 if (config->type == PHYLINK_NETDEV) { 830 pl->netdev = to_net_dev(config->dev); 831 } else if (config->type == PHYLINK_DEV) { 832 pl->dev = config->dev; 833 } else { 834 kfree(pl); 835 return ERR_PTR(-EINVAL); 836 } 837 838 pl->phy_state.interface = iface; 839 pl->link_interface = iface; 840 if (iface == PHY_INTERFACE_MODE_MOCA) 841 pl->link_port = PORT_BNC; 842 else 843 pl->link_port = PORT_MII; 844 pl->link_config.interface = iface; 845 pl->link_config.pause = MLO_PAUSE_AN; 846 pl->link_config.speed = SPEED_UNKNOWN; 847 pl->link_config.duplex = DUPLEX_UNKNOWN; 848 pl->link_config.an_enabled = true; 849 pl->mac_ops = mac_ops; 850 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 851 timer_setup(&pl->link_poll, phylink_fixed_poll, 0); 852 853 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 854 linkmode_copy(pl->link_config.advertising, pl->supported); 855 phylink_validate(pl, pl->supported, &pl->link_config); 856 857 ret = phylink_parse_mode(pl, fwnode); 858 if (ret < 0) { 859 kfree(pl); 860 return ERR_PTR(ret); 861 } 862 863 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 864 ret = phylink_parse_fixedlink(pl, fwnode); 865 if (ret < 0) { 866 kfree(pl); 867 return ERR_PTR(ret); 868 } 869 } 870 871 pl->cur_link_an_mode = pl->cfg_link_an_mode; 872 873 ret = phylink_register_sfp(pl, fwnode); 874 if (ret < 0) { 875 kfree(pl); 876 return ERR_PTR(ret); 877 } 878 879 return pl; 880 } 881 EXPORT_SYMBOL_GPL(phylink_create); 882 883 /** 884 * phylink_set_pcs() - set the current PCS for phylink to use 885 * @pl: a pointer to a &struct phylink returned from phylink_create() 886 * @pcs: a pointer to the &struct phylink_pcs 887 * 888 * Bind the MAC PCS to phylink. This may be called after phylink_create(), 889 * in mac_prepare() or mac_config() methods if it is desired to dynamically 890 * change the PCS. 891 * 892 * Please note that there are behavioural changes with the mac_config() 893 * callback if a PCS is present (denoting a newer setup) so removing a PCS 894 * is not supported, and if a PCS is going to be used, it must be registered 895 * by calling phylink_set_pcs() at the latest in the first mac_config() call. 896 */ 897 void phylink_set_pcs(struct phylink *pl, struct phylink_pcs *pcs) 898 { 899 pl->pcs = pcs; 900 pl->pcs_ops = pcs->ops; 901 } 902 EXPORT_SYMBOL_GPL(phylink_set_pcs); 903 904 /** 905 * phylink_destroy() - cleanup and destroy the phylink instance 906 * @pl: a pointer to a &struct phylink returned from phylink_create() 907 * 908 * Destroy a phylink instance. Any PHY that has been attached must have been 909 * cleaned up via phylink_disconnect_phy() prior to calling this function. 910 * 911 * Note: the rtnl lock must not be held when calling this function. 912 */ 913 void phylink_destroy(struct phylink *pl) 914 { 915 sfp_bus_del_upstream(pl->sfp_bus); 916 if (pl->link_gpio) 917 gpiod_put(pl->link_gpio); 918 919 cancel_work_sync(&pl->resolve); 920 kfree(pl); 921 } 922 EXPORT_SYMBOL_GPL(phylink_destroy); 923 924 static void phylink_phy_change(struct phy_device *phydev, bool up) 925 { 926 struct phylink *pl = phydev->phylink; 927 bool tx_pause, rx_pause; 928 929 phy_get_pause(phydev, &tx_pause, &rx_pause); 930 931 mutex_lock(&pl->state_mutex); 932 pl->phy_state.speed = phydev->speed; 933 pl->phy_state.duplex = phydev->duplex; 934 pl->phy_state.pause = MLO_PAUSE_NONE; 935 if (tx_pause) 936 pl->phy_state.pause |= MLO_PAUSE_TX; 937 if (rx_pause) 938 pl->phy_state.pause |= MLO_PAUSE_RX; 939 pl->phy_state.interface = phydev->interface; 940 pl->phy_state.link = up; 941 mutex_unlock(&pl->state_mutex); 942 943 phylink_run_resolve(pl); 944 945 phylink_dbg(pl, "phy link %s %s/%s/%s\n", up ? "up" : "down", 946 phy_modes(phydev->interface), 947 phy_speed_to_str(phydev->speed), 948 phy_duplex_to_str(phydev->duplex)); 949 } 950 951 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy, 952 phy_interface_t interface) 953 { 954 struct phylink_link_state config; 955 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 956 char *irq_str; 957 int ret; 958 959 /* 960 * This is the new way of dealing with flow control for PHYs, 961 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 962 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 963 * using our validate call to the MAC, we rely upon the MAC 964 * clearing the bits from both supported and advertising fields. 965 */ 966 phy_support_asym_pause(phy); 967 968 memset(&config, 0, sizeof(config)); 969 linkmode_copy(supported, phy->supported); 970 linkmode_copy(config.advertising, phy->advertising); 971 972 /* Clause 45 PHYs switch their Serdes lane between several different 973 * modes, normally 10GBASE-R, SGMII. Some use 2500BASE-X for 2.5G 974 * speeds. We really need to know which interface modes the PHY and 975 * MAC supports to properly work out which linkmodes can be supported. 976 */ 977 if (phy->is_c45 && 978 interface != PHY_INTERFACE_MODE_RXAUI && 979 interface != PHY_INTERFACE_MODE_XAUI && 980 interface != PHY_INTERFACE_MODE_USXGMII) 981 config.interface = PHY_INTERFACE_MODE_NA; 982 else 983 config.interface = interface; 984 985 ret = phylink_validate(pl, supported, &config); 986 if (ret) { 987 phylink_warn(pl, "validation of %s with support %*pb and advertisement %*pb failed: %d\n", 988 phy_modes(config.interface), 989 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->supported, 990 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising, 991 ret); 992 return ret; 993 } 994 995 phy->phylink = pl; 996 phy->phy_link_change = phylink_phy_change; 997 998 irq_str = phy_attached_info_irq(phy); 999 phylink_info(pl, 1000 "PHY [%s] driver [%s] (irq=%s)\n", 1001 dev_name(&phy->mdio.dev), phy->drv->name, irq_str); 1002 kfree(irq_str); 1003 1004 mutex_lock(&phy->lock); 1005 mutex_lock(&pl->state_mutex); 1006 pl->phydev = phy; 1007 pl->phy_state.interface = interface; 1008 pl->phy_state.pause = MLO_PAUSE_NONE; 1009 pl->phy_state.speed = SPEED_UNKNOWN; 1010 pl->phy_state.duplex = DUPLEX_UNKNOWN; 1011 linkmode_copy(pl->supported, supported); 1012 linkmode_copy(pl->link_config.advertising, config.advertising); 1013 1014 /* Restrict the phy advertisement according to the MAC support. */ 1015 linkmode_copy(phy->advertising, config.advertising); 1016 mutex_unlock(&pl->state_mutex); 1017 mutex_unlock(&phy->lock); 1018 1019 phylink_dbg(pl, 1020 "phy: setting supported %*pb advertising %*pb\n", 1021 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported, 1022 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising); 1023 1024 if (phy_interrupt_is_valid(phy)) 1025 phy_request_interrupt(phy); 1026 1027 return 0; 1028 } 1029 1030 static int phylink_attach_phy(struct phylink *pl, struct phy_device *phy, 1031 phy_interface_t interface) 1032 { 1033 if (WARN_ON(pl->cfg_link_an_mode == MLO_AN_FIXED || 1034 (pl->cfg_link_an_mode == MLO_AN_INBAND && 1035 phy_interface_mode_is_8023z(interface)))) 1036 return -EINVAL; 1037 1038 if (pl->phydev) 1039 return -EBUSY; 1040 1041 return phy_attach_direct(pl->netdev, phy, 0, interface); 1042 } 1043 1044 /** 1045 * phylink_connect_phy() - connect a PHY to the phylink instance 1046 * @pl: a pointer to a &struct phylink returned from phylink_create() 1047 * @phy: a pointer to a &struct phy_device. 1048 * 1049 * Connect @phy to the phylink instance specified by @pl by calling 1050 * phy_attach_direct(). Configure the @phy according to the MAC driver's 1051 * capabilities, start the PHYLIB state machine and enable any interrupts 1052 * that the PHY supports. 1053 * 1054 * This updates the phylink's ethtool supported and advertising link mode 1055 * masks. 1056 * 1057 * Returns 0 on success or a negative errno. 1058 */ 1059 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy) 1060 { 1061 int ret; 1062 1063 /* Use PHY device/driver interface */ 1064 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 1065 pl->link_interface = phy->interface; 1066 pl->link_config.interface = pl->link_interface; 1067 } 1068 1069 ret = phylink_attach_phy(pl, phy, pl->link_interface); 1070 if (ret < 0) 1071 return ret; 1072 1073 ret = phylink_bringup_phy(pl, phy, pl->link_config.interface); 1074 if (ret) 1075 phy_detach(phy); 1076 1077 return ret; 1078 } 1079 EXPORT_SYMBOL_GPL(phylink_connect_phy); 1080 1081 /** 1082 * phylink_of_phy_connect() - connect the PHY specified in the DT mode. 1083 * @pl: a pointer to a &struct phylink returned from phylink_create() 1084 * @dn: a pointer to a &struct device_node. 1085 * @flags: PHY-specific flags to communicate to the PHY device driver 1086 * 1087 * Connect the phy specified in the device node @dn to the phylink instance 1088 * specified by @pl. Actions specified in phylink_connect_phy() will be 1089 * performed. 1090 * 1091 * Returns 0 on success or a negative errno. 1092 */ 1093 int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn, 1094 u32 flags) 1095 { 1096 return phylink_fwnode_phy_connect(pl, of_fwnode_handle(dn), flags); 1097 } 1098 EXPORT_SYMBOL_GPL(phylink_of_phy_connect); 1099 1100 /** 1101 * phylink_fwnode_phy_connect() - connect the PHY specified in the fwnode. 1102 * @pl: a pointer to a &struct phylink returned from phylink_create() 1103 * @fwnode: a pointer to a &struct fwnode_handle. 1104 * @flags: PHY-specific flags to communicate to the PHY device driver 1105 * 1106 * Connect the phy specified @fwnode to the phylink instance specified 1107 * by @pl. 1108 * 1109 * Returns 0 on success or a negative errno. 1110 */ 1111 int phylink_fwnode_phy_connect(struct phylink *pl, 1112 struct fwnode_handle *fwnode, 1113 u32 flags) 1114 { 1115 struct fwnode_handle *phy_fwnode; 1116 struct phy_device *phy_dev; 1117 int ret; 1118 1119 /* Fixed links and 802.3z are handled without needing a PHY */ 1120 if (pl->cfg_link_an_mode == MLO_AN_FIXED || 1121 (pl->cfg_link_an_mode == MLO_AN_INBAND && 1122 phy_interface_mode_is_8023z(pl->link_interface))) 1123 return 0; 1124 1125 phy_fwnode = fwnode_get_phy_node(fwnode); 1126 if (IS_ERR(phy_fwnode)) { 1127 if (pl->cfg_link_an_mode == MLO_AN_PHY) 1128 return -ENODEV; 1129 return 0; 1130 } 1131 1132 phy_dev = fwnode_phy_find_device(phy_fwnode); 1133 /* We're done with the phy_node handle */ 1134 fwnode_handle_put(phy_fwnode); 1135 if (!phy_dev) 1136 return -ENODEV; 1137 1138 ret = phy_attach_direct(pl->netdev, phy_dev, flags, 1139 pl->link_interface); 1140 if (ret) { 1141 phy_device_free(phy_dev); 1142 return ret; 1143 } 1144 1145 ret = phylink_bringup_phy(pl, phy_dev, pl->link_config.interface); 1146 if (ret) 1147 phy_detach(phy_dev); 1148 1149 return ret; 1150 } 1151 EXPORT_SYMBOL_GPL(phylink_fwnode_phy_connect); 1152 1153 /** 1154 * phylink_disconnect_phy() - disconnect any PHY attached to the phylink 1155 * instance. 1156 * @pl: a pointer to a &struct phylink returned from phylink_create() 1157 * 1158 * Disconnect any current PHY from the phylink instance described by @pl. 1159 */ 1160 void phylink_disconnect_phy(struct phylink *pl) 1161 { 1162 struct phy_device *phy; 1163 1164 ASSERT_RTNL(); 1165 1166 phy = pl->phydev; 1167 if (phy) { 1168 mutex_lock(&phy->lock); 1169 mutex_lock(&pl->state_mutex); 1170 pl->phydev = NULL; 1171 mutex_unlock(&pl->state_mutex); 1172 mutex_unlock(&phy->lock); 1173 flush_work(&pl->resolve); 1174 1175 phy_disconnect(phy); 1176 } 1177 } 1178 EXPORT_SYMBOL_GPL(phylink_disconnect_phy); 1179 1180 /** 1181 * phylink_mac_change() - notify phylink of a change in MAC state 1182 * @pl: a pointer to a &struct phylink returned from phylink_create() 1183 * @up: indicates whether the link is currently up. 1184 * 1185 * The MAC driver should call this driver when the state of its link 1186 * changes (eg, link failure, new negotiation results, etc.) 1187 */ 1188 void phylink_mac_change(struct phylink *pl, bool up) 1189 { 1190 if (!up) 1191 pl->mac_link_dropped = true; 1192 phylink_run_resolve(pl); 1193 phylink_dbg(pl, "mac link %s\n", up ? "up" : "down"); 1194 } 1195 EXPORT_SYMBOL_GPL(phylink_mac_change); 1196 1197 static irqreturn_t phylink_link_handler(int irq, void *data) 1198 { 1199 struct phylink *pl = data; 1200 1201 phylink_run_resolve(pl); 1202 1203 return IRQ_HANDLED; 1204 } 1205 1206 /** 1207 * phylink_start() - start a phylink instance 1208 * @pl: a pointer to a &struct phylink returned from phylink_create() 1209 * 1210 * Start the phylink instance specified by @pl, configuring the MAC for the 1211 * desired link mode(s) and negotiation style. This should be called from the 1212 * network device driver's &struct net_device_ops ndo_open() method. 1213 */ 1214 void phylink_start(struct phylink *pl) 1215 { 1216 bool poll = false; 1217 1218 ASSERT_RTNL(); 1219 1220 phylink_info(pl, "configuring for %s/%s link mode\n", 1221 phylink_an_mode_str(pl->cur_link_an_mode), 1222 phy_modes(pl->link_config.interface)); 1223 1224 /* Always set the carrier off */ 1225 if (pl->netdev) 1226 netif_carrier_off(pl->netdev); 1227 1228 /* Apply the link configuration to the MAC when starting. This allows 1229 * a fixed-link to start with the correct parameters, and also 1230 * ensures that we set the appropriate advertisement for Serdes links. 1231 * 1232 * Restart autonegotiation if using 802.3z to ensure that the link 1233 * parameters are properly negotiated. This is necessary for DSA 1234 * switches using 802.3z negotiation to ensure they see our modes. 1235 */ 1236 phylink_mac_initial_config(pl, true); 1237 1238 clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 1239 phylink_run_resolve(pl); 1240 1241 if (pl->cfg_link_an_mode == MLO_AN_FIXED && pl->link_gpio) { 1242 int irq = gpiod_to_irq(pl->link_gpio); 1243 1244 if (irq > 0) { 1245 if (!request_irq(irq, phylink_link_handler, 1246 IRQF_TRIGGER_RISING | 1247 IRQF_TRIGGER_FALLING, 1248 "netdev link", pl)) 1249 pl->link_irq = irq; 1250 else 1251 irq = 0; 1252 } 1253 if (irq <= 0) 1254 poll = true; 1255 } 1256 1257 switch (pl->cfg_link_an_mode) { 1258 case MLO_AN_FIXED: 1259 poll |= pl->config->poll_fixed_state; 1260 break; 1261 case MLO_AN_INBAND: 1262 poll |= pl->config->pcs_poll; 1263 if (pl->pcs) 1264 poll |= pl->pcs->poll; 1265 break; 1266 } 1267 if (poll) 1268 mod_timer(&pl->link_poll, jiffies + HZ); 1269 if (pl->phydev) 1270 phy_start(pl->phydev); 1271 if (pl->sfp_bus) 1272 sfp_upstream_start(pl->sfp_bus); 1273 } 1274 EXPORT_SYMBOL_GPL(phylink_start); 1275 1276 /** 1277 * phylink_stop() - stop a phylink instance 1278 * @pl: a pointer to a &struct phylink returned from phylink_create() 1279 * 1280 * Stop the phylink instance specified by @pl. This should be called from the 1281 * network device driver's &struct net_device_ops ndo_stop() method. The 1282 * network device's carrier state should not be changed prior to calling this 1283 * function. 1284 */ 1285 void phylink_stop(struct phylink *pl) 1286 { 1287 ASSERT_RTNL(); 1288 1289 if (pl->sfp_bus) 1290 sfp_upstream_stop(pl->sfp_bus); 1291 if (pl->phydev) 1292 phy_stop(pl->phydev); 1293 del_timer_sync(&pl->link_poll); 1294 if (pl->link_irq) { 1295 free_irq(pl->link_irq, pl); 1296 pl->link_irq = 0; 1297 } 1298 1299 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED); 1300 } 1301 EXPORT_SYMBOL_GPL(phylink_stop); 1302 1303 /** 1304 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY 1305 * @pl: a pointer to a &struct phylink returned from phylink_create() 1306 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters 1307 * 1308 * Read the wake on lan parameters from the PHY attached to the phylink 1309 * instance specified by @pl. If no PHY is currently attached, report no 1310 * support for wake on lan. 1311 */ 1312 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 1313 { 1314 ASSERT_RTNL(); 1315 1316 wol->supported = 0; 1317 wol->wolopts = 0; 1318 1319 if (pl->phydev) 1320 phy_ethtool_get_wol(pl->phydev, wol); 1321 } 1322 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol); 1323 1324 /** 1325 * phylink_ethtool_set_wol() - set wake on lan parameters 1326 * @pl: a pointer to a &struct phylink returned from phylink_create() 1327 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters 1328 * 1329 * Set the wake on lan parameters for the PHY attached to the phylink 1330 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP 1331 * error. 1332 * 1333 * Returns zero on success or negative errno code. 1334 */ 1335 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 1336 { 1337 int ret = -EOPNOTSUPP; 1338 1339 ASSERT_RTNL(); 1340 1341 if (pl->phydev) 1342 ret = phy_ethtool_set_wol(pl->phydev, wol); 1343 1344 return ret; 1345 } 1346 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol); 1347 1348 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b) 1349 { 1350 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask); 1351 1352 linkmode_zero(mask); 1353 phylink_set_port_modes(mask); 1354 1355 linkmode_and(dst, dst, mask); 1356 linkmode_or(dst, dst, b); 1357 } 1358 1359 static void phylink_get_ksettings(const struct phylink_link_state *state, 1360 struct ethtool_link_ksettings *kset) 1361 { 1362 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising); 1363 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising); 1364 kset->base.speed = state->speed; 1365 kset->base.duplex = state->duplex; 1366 kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE : 1367 AUTONEG_DISABLE; 1368 } 1369 1370 /** 1371 * phylink_ethtool_ksettings_get() - get the current link settings 1372 * @pl: a pointer to a &struct phylink returned from phylink_create() 1373 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings 1374 * 1375 * Read the current link settings for the phylink instance specified by @pl. 1376 * This will be the link settings read from the MAC, PHY or fixed link 1377 * settings depending on the current negotiation mode. 1378 */ 1379 int phylink_ethtool_ksettings_get(struct phylink *pl, 1380 struct ethtool_link_ksettings *kset) 1381 { 1382 struct phylink_link_state link_state; 1383 1384 ASSERT_RTNL(); 1385 1386 if (pl->phydev) { 1387 phy_ethtool_ksettings_get(pl->phydev, kset); 1388 } else { 1389 kset->base.port = pl->link_port; 1390 } 1391 1392 linkmode_copy(kset->link_modes.supported, pl->supported); 1393 1394 switch (pl->cur_link_an_mode) { 1395 case MLO_AN_FIXED: 1396 /* We are using fixed settings. Report these as the 1397 * current link settings - and note that these also 1398 * represent the supported speeds/duplex/pause modes. 1399 */ 1400 phylink_get_fixed_state(pl, &link_state); 1401 phylink_get_ksettings(&link_state, kset); 1402 break; 1403 1404 case MLO_AN_INBAND: 1405 /* If there is a phy attached, then use the reported 1406 * settings from the phy with no modification. 1407 */ 1408 if (pl->phydev) 1409 break; 1410 1411 phylink_mac_pcs_get_state(pl, &link_state); 1412 1413 /* The MAC is reporting the link results from its own PCS 1414 * layer via in-band status. Report these as the current 1415 * link settings. 1416 */ 1417 phylink_get_ksettings(&link_state, kset); 1418 break; 1419 } 1420 1421 return 0; 1422 } 1423 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get); 1424 1425 /** 1426 * phylink_ethtool_ksettings_set() - set the link settings 1427 * @pl: a pointer to a &struct phylink returned from phylink_create() 1428 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes 1429 */ 1430 int phylink_ethtool_ksettings_set(struct phylink *pl, 1431 const struct ethtool_link_ksettings *kset) 1432 { 1433 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 1434 struct phylink_link_state config; 1435 const struct phy_setting *s; 1436 1437 ASSERT_RTNL(); 1438 1439 if (pl->phydev) { 1440 /* We can rely on phylib for this update; we also do not need 1441 * to update the pl->link_config settings: 1442 * - the configuration returned via ksettings_get() will come 1443 * from phylib whenever a PHY is present. 1444 * - link_config.interface will be updated by the PHY calling 1445 * back via phylink_phy_change() and a subsequent resolve. 1446 * - initial link configuration for PHY mode comes from the 1447 * last phy state updated via phylink_phy_change(). 1448 * - other configuration changes (e.g. pause modes) are 1449 * performed directly via phylib. 1450 * - if in in-band mode with a PHY, the link configuration 1451 * is passed on the link from the PHY, and all of 1452 * link_config.{speed,duplex,an_enabled,pause} are not used. 1453 * - the only possible use would be link_config.advertising 1454 * pause modes when in 1000base-X mode with a PHY, but in 1455 * the presence of a PHY, this should not be changed as that 1456 * should be determined from the media side advertisement. 1457 */ 1458 return phy_ethtool_ksettings_set(pl->phydev, kset); 1459 } 1460 1461 linkmode_copy(support, pl->supported); 1462 config = pl->link_config; 1463 config.an_enabled = kset->base.autoneg == AUTONEG_ENABLE; 1464 1465 /* Mask out unsupported advertisements, and force the autoneg bit */ 1466 linkmode_and(config.advertising, kset->link_modes.advertising, 1467 support); 1468 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising, 1469 config.an_enabled); 1470 1471 /* FIXME: should we reject autoneg if phy/mac does not support it? */ 1472 switch (kset->base.autoneg) { 1473 case AUTONEG_DISABLE: 1474 /* Autonegotiation disabled, select a suitable speed and 1475 * duplex. 1476 */ 1477 s = phy_lookup_setting(kset->base.speed, kset->base.duplex, 1478 support, false); 1479 if (!s) 1480 return -EINVAL; 1481 1482 /* If we have a fixed link, refuse to change link parameters. 1483 * If the link parameters match, accept them but do nothing. 1484 */ 1485 if (pl->cur_link_an_mode == MLO_AN_FIXED) { 1486 if (s->speed != pl->link_config.speed || 1487 s->duplex != pl->link_config.duplex) 1488 return -EINVAL; 1489 return 0; 1490 } 1491 1492 config.speed = s->speed; 1493 config.duplex = s->duplex; 1494 break; 1495 1496 case AUTONEG_ENABLE: 1497 /* If we have a fixed link, allow autonegotiation (since that 1498 * is our default case) but do not allow the advertisement to 1499 * be changed. If the advertisement matches, simply return. 1500 */ 1501 if (pl->cur_link_an_mode == MLO_AN_FIXED) { 1502 if (!linkmode_equal(config.advertising, 1503 pl->link_config.advertising)) 1504 return -EINVAL; 1505 return 0; 1506 } 1507 1508 config.speed = SPEED_UNKNOWN; 1509 config.duplex = DUPLEX_UNKNOWN; 1510 break; 1511 1512 default: 1513 return -EINVAL; 1514 } 1515 1516 /* We have ruled out the case with a PHY attached, and the 1517 * fixed-link cases. All that is left are in-band links. 1518 */ 1519 if (phylink_validate(pl, support, &config)) 1520 return -EINVAL; 1521 1522 /* If autonegotiation is enabled, we must have an advertisement */ 1523 if (config.an_enabled && phylink_is_empty_linkmode(config.advertising)) 1524 return -EINVAL; 1525 1526 mutex_lock(&pl->state_mutex); 1527 pl->link_config.speed = config.speed; 1528 pl->link_config.duplex = config.duplex; 1529 pl->link_config.an_enabled = config.an_enabled; 1530 1531 if (pl->link_config.interface != config.interface) { 1532 /* The interface changed, e.g. 1000base-X <-> 2500base-X */ 1533 /* We need to force the link down, then change the interface */ 1534 if (pl->old_link_state) { 1535 phylink_link_down(pl); 1536 pl->old_link_state = false; 1537 } 1538 if (!test_bit(PHYLINK_DISABLE_STOPPED, 1539 &pl->phylink_disable_state)) 1540 phylink_major_config(pl, false, &config); 1541 pl->link_config.interface = config.interface; 1542 linkmode_copy(pl->link_config.advertising, config.advertising); 1543 } else if (!linkmode_equal(pl->link_config.advertising, 1544 config.advertising)) { 1545 linkmode_copy(pl->link_config.advertising, config.advertising); 1546 phylink_change_inband_advert(pl); 1547 } 1548 mutex_unlock(&pl->state_mutex); 1549 1550 return 0; 1551 } 1552 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set); 1553 1554 /** 1555 * phylink_ethtool_nway_reset() - restart negotiation 1556 * @pl: a pointer to a &struct phylink returned from phylink_create() 1557 * 1558 * Restart negotiation for the phylink instance specified by @pl. This will 1559 * cause any attached phy to restart negotiation with the link partner, and 1560 * if the MAC is in a BaseX mode, the MAC will also be requested to restart 1561 * negotiation. 1562 * 1563 * Returns zero on success, or negative error code. 1564 */ 1565 int phylink_ethtool_nway_reset(struct phylink *pl) 1566 { 1567 int ret = 0; 1568 1569 ASSERT_RTNL(); 1570 1571 if (pl->phydev) 1572 ret = phy_restart_aneg(pl->phydev); 1573 phylink_mac_pcs_an_restart(pl); 1574 1575 return ret; 1576 } 1577 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset); 1578 1579 /** 1580 * phylink_ethtool_get_pauseparam() - get the current pause parameters 1581 * @pl: a pointer to a &struct phylink returned from phylink_create() 1582 * @pause: a pointer to a &struct ethtool_pauseparam 1583 */ 1584 void phylink_ethtool_get_pauseparam(struct phylink *pl, 1585 struct ethtool_pauseparam *pause) 1586 { 1587 ASSERT_RTNL(); 1588 1589 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN); 1590 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX); 1591 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX); 1592 } 1593 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam); 1594 1595 /** 1596 * phylink_ethtool_set_pauseparam() - set the current pause parameters 1597 * @pl: a pointer to a &struct phylink returned from phylink_create() 1598 * @pause: a pointer to a &struct ethtool_pauseparam 1599 */ 1600 int phylink_ethtool_set_pauseparam(struct phylink *pl, 1601 struct ethtool_pauseparam *pause) 1602 { 1603 struct phylink_link_state *config = &pl->link_config; 1604 bool manual_changed; 1605 int pause_state; 1606 1607 ASSERT_RTNL(); 1608 1609 if (pl->cur_link_an_mode == MLO_AN_FIXED) 1610 return -EOPNOTSUPP; 1611 1612 if (!phylink_test(pl->supported, Pause) && 1613 !phylink_test(pl->supported, Asym_Pause)) 1614 return -EOPNOTSUPP; 1615 1616 if (!phylink_test(pl->supported, Asym_Pause) && 1617 !pause->autoneg && pause->rx_pause != pause->tx_pause) 1618 return -EINVAL; 1619 1620 pause_state = 0; 1621 if (pause->autoneg) 1622 pause_state |= MLO_PAUSE_AN; 1623 if (pause->rx_pause) 1624 pause_state |= MLO_PAUSE_RX; 1625 if (pause->tx_pause) 1626 pause_state |= MLO_PAUSE_TX; 1627 1628 mutex_lock(&pl->state_mutex); 1629 /* 1630 * See the comments for linkmode_set_pause(), wrt the deficiencies 1631 * with the current implementation. A solution to this issue would 1632 * be: 1633 * ethtool Local device 1634 * rx tx Pause AsymDir 1635 * 0 0 0 0 1636 * 1 0 1 1 1637 * 0 1 0 1 1638 * 1 1 1 1 1639 * and then use the ethtool rx/tx enablement status to mask the 1640 * rx/tx pause resolution. 1641 */ 1642 linkmode_set_pause(config->advertising, pause->tx_pause, 1643 pause->rx_pause); 1644 1645 manual_changed = (config->pause ^ pause_state) & MLO_PAUSE_AN || 1646 (!(pause_state & MLO_PAUSE_AN) && 1647 (config->pause ^ pause_state) & MLO_PAUSE_TXRX_MASK); 1648 1649 config->pause = pause_state; 1650 1651 /* Update our in-band advertisement, triggering a renegotiation if 1652 * the advertisement changed. 1653 */ 1654 if (!pl->phydev) 1655 phylink_change_inband_advert(pl); 1656 1657 mutex_unlock(&pl->state_mutex); 1658 1659 /* If we have a PHY, a change of the pause frame advertisement will 1660 * cause phylib to renegotiate (if AN is enabled) which will in turn 1661 * call our phylink_phy_change() and trigger a resolve. Note that 1662 * we can't hold our state mutex while calling phy_set_asym_pause(). 1663 */ 1664 if (pl->phydev) 1665 phy_set_asym_pause(pl->phydev, pause->rx_pause, 1666 pause->tx_pause); 1667 1668 /* If the manual pause settings changed, make sure we trigger a 1669 * resolve to update their state; we can not guarantee that the 1670 * link will cycle. 1671 */ 1672 if (manual_changed) { 1673 pl->mac_link_dropped = true; 1674 phylink_run_resolve(pl); 1675 } 1676 1677 return 0; 1678 } 1679 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam); 1680 1681 /** 1682 * phylink_get_eee_err() - read the energy efficient ethernet error 1683 * counter 1684 * @pl: a pointer to a &struct phylink returned from phylink_create(). 1685 * 1686 * Read the Energy Efficient Ethernet error counter from the PHY associated 1687 * with the phylink instance specified by @pl. 1688 * 1689 * Returns positive error counter value, or negative error code. 1690 */ 1691 int phylink_get_eee_err(struct phylink *pl) 1692 { 1693 int ret = 0; 1694 1695 ASSERT_RTNL(); 1696 1697 if (pl->phydev) 1698 ret = phy_get_eee_err(pl->phydev); 1699 1700 return ret; 1701 } 1702 EXPORT_SYMBOL_GPL(phylink_get_eee_err); 1703 1704 /** 1705 * phylink_init_eee() - init and check the EEE features 1706 * @pl: a pointer to a &struct phylink returned from phylink_create() 1707 * @clk_stop_enable: allow PHY to stop receive clock 1708 * 1709 * Must be called either with RTNL held or within mac_link_up() 1710 */ 1711 int phylink_init_eee(struct phylink *pl, bool clk_stop_enable) 1712 { 1713 int ret = -EOPNOTSUPP; 1714 1715 if (pl->phydev) 1716 ret = phy_init_eee(pl->phydev, clk_stop_enable); 1717 1718 return ret; 1719 } 1720 EXPORT_SYMBOL_GPL(phylink_init_eee); 1721 1722 /** 1723 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters 1724 * @pl: a pointer to a &struct phylink returned from phylink_create() 1725 * @eee: a pointer to a &struct ethtool_eee for the read parameters 1726 */ 1727 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee) 1728 { 1729 int ret = -EOPNOTSUPP; 1730 1731 ASSERT_RTNL(); 1732 1733 if (pl->phydev) 1734 ret = phy_ethtool_get_eee(pl->phydev, eee); 1735 1736 return ret; 1737 } 1738 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee); 1739 1740 /** 1741 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters 1742 * @pl: a pointer to a &struct phylink returned from phylink_create() 1743 * @eee: a pointer to a &struct ethtool_eee for the desired parameters 1744 */ 1745 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee) 1746 { 1747 int ret = -EOPNOTSUPP; 1748 1749 ASSERT_RTNL(); 1750 1751 if (pl->phydev) 1752 ret = phy_ethtool_set_eee(pl->phydev, eee); 1753 1754 return ret; 1755 } 1756 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee); 1757 1758 /* This emulates MII registers for a fixed-mode phy operating as per the 1759 * passed in state. "aneg" defines if we report negotiation is possible. 1760 * 1761 * FIXME: should deal with negotiation state too. 1762 */ 1763 static int phylink_mii_emul_read(unsigned int reg, 1764 struct phylink_link_state *state) 1765 { 1766 struct fixed_phy_status fs; 1767 unsigned long *lpa = state->lp_advertising; 1768 int val; 1769 1770 fs.link = state->link; 1771 fs.speed = state->speed; 1772 fs.duplex = state->duplex; 1773 fs.pause = test_bit(ETHTOOL_LINK_MODE_Pause_BIT, lpa); 1774 fs.asym_pause = test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, lpa); 1775 1776 val = swphy_read_reg(reg, &fs); 1777 if (reg == MII_BMSR) { 1778 if (!state->an_complete) 1779 val &= ~BMSR_ANEGCOMPLETE; 1780 } 1781 return val; 1782 } 1783 1784 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id, 1785 unsigned int reg) 1786 { 1787 struct phy_device *phydev = pl->phydev; 1788 int prtad, devad; 1789 1790 if (mdio_phy_id_is_c45(phy_id)) { 1791 prtad = mdio_phy_id_prtad(phy_id); 1792 devad = mdio_phy_id_devad(phy_id); 1793 devad = mdiobus_c45_addr(devad, reg); 1794 } else if (phydev->is_c45) { 1795 switch (reg) { 1796 case MII_BMCR: 1797 case MII_BMSR: 1798 case MII_PHYSID1: 1799 case MII_PHYSID2: 1800 devad = __ffs(phydev->c45_ids.mmds_present); 1801 break; 1802 case MII_ADVERTISE: 1803 case MII_LPA: 1804 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 1805 return -EINVAL; 1806 devad = MDIO_MMD_AN; 1807 if (reg == MII_ADVERTISE) 1808 reg = MDIO_AN_ADVERTISE; 1809 else 1810 reg = MDIO_AN_LPA; 1811 break; 1812 default: 1813 return -EINVAL; 1814 } 1815 prtad = phy_id; 1816 devad = mdiobus_c45_addr(devad, reg); 1817 } else { 1818 prtad = phy_id; 1819 devad = reg; 1820 } 1821 return mdiobus_read(pl->phydev->mdio.bus, prtad, devad); 1822 } 1823 1824 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id, 1825 unsigned int reg, unsigned int val) 1826 { 1827 struct phy_device *phydev = pl->phydev; 1828 int prtad, devad; 1829 1830 if (mdio_phy_id_is_c45(phy_id)) { 1831 prtad = mdio_phy_id_prtad(phy_id); 1832 devad = mdio_phy_id_devad(phy_id); 1833 devad = mdiobus_c45_addr(devad, reg); 1834 } else if (phydev->is_c45) { 1835 switch (reg) { 1836 case MII_BMCR: 1837 case MII_BMSR: 1838 case MII_PHYSID1: 1839 case MII_PHYSID2: 1840 devad = __ffs(phydev->c45_ids.mmds_present); 1841 break; 1842 case MII_ADVERTISE: 1843 case MII_LPA: 1844 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 1845 return -EINVAL; 1846 devad = MDIO_MMD_AN; 1847 if (reg == MII_ADVERTISE) 1848 reg = MDIO_AN_ADVERTISE; 1849 else 1850 reg = MDIO_AN_LPA; 1851 break; 1852 default: 1853 return -EINVAL; 1854 } 1855 prtad = phy_id; 1856 devad = mdiobus_c45_addr(devad, reg); 1857 } else { 1858 prtad = phy_id; 1859 devad = reg; 1860 } 1861 1862 return mdiobus_write(phydev->mdio.bus, prtad, devad, val); 1863 } 1864 1865 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id, 1866 unsigned int reg) 1867 { 1868 struct phylink_link_state state; 1869 int val = 0xffff; 1870 1871 switch (pl->cur_link_an_mode) { 1872 case MLO_AN_FIXED: 1873 if (phy_id == 0) { 1874 phylink_get_fixed_state(pl, &state); 1875 val = phylink_mii_emul_read(reg, &state); 1876 } 1877 break; 1878 1879 case MLO_AN_PHY: 1880 return -EOPNOTSUPP; 1881 1882 case MLO_AN_INBAND: 1883 if (phy_id == 0) { 1884 phylink_mac_pcs_get_state(pl, &state); 1885 val = phylink_mii_emul_read(reg, &state); 1886 } 1887 break; 1888 } 1889 1890 return val & 0xffff; 1891 } 1892 1893 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id, 1894 unsigned int reg, unsigned int val) 1895 { 1896 switch (pl->cur_link_an_mode) { 1897 case MLO_AN_FIXED: 1898 break; 1899 1900 case MLO_AN_PHY: 1901 return -EOPNOTSUPP; 1902 1903 case MLO_AN_INBAND: 1904 break; 1905 } 1906 1907 return 0; 1908 } 1909 1910 /** 1911 * phylink_mii_ioctl() - generic mii ioctl interface 1912 * @pl: a pointer to a &struct phylink returned from phylink_create() 1913 * @ifr: a pointer to a &struct ifreq for socket ioctls 1914 * @cmd: ioctl cmd to execute 1915 * 1916 * Perform the specified MII ioctl on the PHY attached to the phylink instance 1917 * specified by @pl. If no PHY is attached, emulate the presence of the PHY. 1918 * 1919 * Returns: zero on success or negative error code. 1920 * 1921 * %SIOCGMIIPHY: 1922 * read register from the current PHY. 1923 * %SIOCGMIIREG: 1924 * read register from the specified PHY. 1925 * %SIOCSMIIREG: 1926 * set a register on the specified PHY. 1927 */ 1928 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd) 1929 { 1930 struct mii_ioctl_data *mii = if_mii(ifr); 1931 int ret; 1932 1933 ASSERT_RTNL(); 1934 1935 if (pl->phydev) { 1936 /* PHYs only exist for MLO_AN_PHY and SGMII */ 1937 switch (cmd) { 1938 case SIOCGMIIPHY: 1939 mii->phy_id = pl->phydev->mdio.addr; 1940 fallthrough; 1941 1942 case SIOCGMIIREG: 1943 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num); 1944 if (ret >= 0) { 1945 mii->val_out = ret; 1946 ret = 0; 1947 } 1948 break; 1949 1950 case SIOCSMIIREG: 1951 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num, 1952 mii->val_in); 1953 break; 1954 1955 default: 1956 ret = phy_mii_ioctl(pl->phydev, ifr, cmd); 1957 break; 1958 } 1959 } else { 1960 switch (cmd) { 1961 case SIOCGMIIPHY: 1962 mii->phy_id = 0; 1963 fallthrough; 1964 1965 case SIOCGMIIREG: 1966 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num); 1967 if (ret >= 0) { 1968 mii->val_out = ret; 1969 ret = 0; 1970 } 1971 break; 1972 1973 case SIOCSMIIREG: 1974 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num, 1975 mii->val_in); 1976 break; 1977 1978 default: 1979 ret = -EOPNOTSUPP; 1980 break; 1981 } 1982 } 1983 1984 return ret; 1985 } 1986 EXPORT_SYMBOL_GPL(phylink_mii_ioctl); 1987 1988 /** 1989 * phylink_speed_down() - set the non-SFP PHY to lowest speed supported by both 1990 * link partners 1991 * @pl: a pointer to a &struct phylink returned from phylink_create() 1992 * @sync: perform action synchronously 1993 * 1994 * If we have a PHY that is not part of a SFP module, then set the speed 1995 * as described in the phy_speed_down() function. Please see this function 1996 * for a description of the @sync parameter. 1997 * 1998 * Returns zero if there is no PHY, otherwise as per phy_speed_down(). 1999 */ 2000 int phylink_speed_down(struct phylink *pl, bool sync) 2001 { 2002 int ret = 0; 2003 2004 ASSERT_RTNL(); 2005 2006 if (!pl->sfp_bus && pl->phydev) 2007 ret = phy_speed_down(pl->phydev, sync); 2008 2009 return ret; 2010 } 2011 EXPORT_SYMBOL_GPL(phylink_speed_down); 2012 2013 /** 2014 * phylink_speed_up() - restore the advertised speeds prior to the call to 2015 * phylink_speed_down() 2016 * @pl: a pointer to a &struct phylink returned from phylink_create() 2017 * 2018 * If we have a PHY that is not part of a SFP module, then restore the 2019 * PHY speeds as per phy_speed_up(). 2020 * 2021 * Returns zero if there is no PHY, otherwise as per phy_speed_up(). 2022 */ 2023 int phylink_speed_up(struct phylink *pl) 2024 { 2025 int ret = 0; 2026 2027 ASSERT_RTNL(); 2028 2029 if (!pl->sfp_bus && pl->phydev) 2030 ret = phy_speed_up(pl->phydev); 2031 2032 return ret; 2033 } 2034 EXPORT_SYMBOL_GPL(phylink_speed_up); 2035 2036 static void phylink_sfp_attach(void *upstream, struct sfp_bus *bus) 2037 { 2038 struct phylink *pl = upstream; 2039 2040 pl->netdev->sfp_bus = bus; 2041 } 2042 2043 static void phylink_sfp_detach(void *upstream, struct sfp_bus *bus) 2044 { 2045 struct phylink *pl = upstream; 2046 2047 pl->netdev->sfp_bus = NULL; 2048 } 2049 2050 static int phylink_sfp_config(struct phylink *pl, u8 mode, 2051 const unsigned long *supported, 2052 const unsigned long *advertising) 2053 { 2054 __ETHTOOL_DECLARE_LINK_MODE_MASK(support1); 2055 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 2056 struct phylink_link_state config; 2057 phy_interface_t iface; 2058 bool changed; 2059 int ret; 2060 2061 linkmode_copy(support, supported); 2062 2063 memset(&config, 0, sizeof(config)); 2064 linkmode_copy(config.advertising, advertising); 2065 config.interface = PHY_INTERFACE_MODE_NA; 2066 config.speed = SPEED_UNKNOWN; 2067 config.duplex = DUPLEX_UNKNOWN; 2068 config.pause = MLO_PAUSE_AN; 2069 config.an_enabled = pl->link_config.an_enabled; 2070 2071 /* Ignore errors if we're expecting a PHY to attach later */ 2072 ret = phylink_validate(pl, support, &config); 2073 if (ret) { 2074 phylink_err(pl, "validation with support %*pb failed: %d\n", 2075 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret); 2076 return ret; 2077 } 2078 2079 iface = sfp_select_interface(pl->sfp_bus, config.advertising); 2080 if (iface == PHY_INTERFACE_MODE_NA) { 2081 phylink_err(pl, 2082 "selection of interface failed, advertisement %*pb\n", 2083 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising); 2084 return -EINVAL; 2085 } 2086 2087 config.interface = iface; 2088 linkmode_copy(support1, support); 2089 ret = phylink_validate(pl, support1, &config); 2090 if (ret) { 2091 phylink_err(pl, "validation of %s/%s with support %*pb failed: %d\n", 2092 phylink_an_mode_str(mode), 2093 phy_modes(config.interface), 2094 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret); 2095 return ret; 2096 } 2097 2098 phylink_dbg(pl, "requesting link mode %s/%s with support %*pb\n", 2099 phylink_an_mode_str(mode), phy_modes(config.interface), 2100 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 2101 2102 if (phy_interface_mode_is_8023z(iface) && pl->phydev) 2103 return -EINVAL; 2104 2105 changed = !linkmode_equal(pl->supported, support); 2106 if (changed) { 2107 linkmode_copy(pl->supported, support); 2108 linkmode_copy(pl->link_config.advertising, config.advertising); 2109 } 2110 2111 if (pl->cur_link_an_mode != mode || 2112 pl->link_config.interface != config.interface) { 2113 pl->link_config.interface = config.interface; 2114 pl->cur_link_an_mode = mode; 2115 2116 changed = true; 2117 2118 phylink_info(pl, "switched to %s/%s link mode\n", 2119 phylink_an_mode_str(mode), 2120 phy_modes(config.interface)); 2121 } 2122 2123 pl->link_port = pl->sfp_port; 2124 2125 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED, 2126 &pl->phylink_disable_state)) 2127 phylink_mac_initial_config(pl, false); 2128 2129 return ret; 2130 } 2131 2132 static int phylink_sfp_module_insert(void *upstream, 2133 const struct sfp_eeprom_id *id) 2134 { 2135 struct phylink *pl = upstream; 2136 unsigned long *support = pl->sfp_support; 2137 2138 ASSERT_RTNL(); 2139 2140 linkmode_zero(support); 2141 sfp_parse_support(pl->sfp_bus, id, support); 2142 pl->sfp_port = sfp_parse_port(pl->sfp_bus, id, support); 2143 2144 /* If this module may have a PHY connecting later, defer until later */ 2145 pl->sfp_may_have_phy = sfp_may_have_phy(pl->sfp_bus, id); 2146 if (pl->sfp_may_have_phy) 2147 return 0; 2148 2149 return phylink_sfp_config(pl, MLO_AN_INBAND, support, support); 2150 } 2151 2152 static int phylink_sfp_module_start(void *upstream) 2153 { 2154 struct phylink *pl = upstream; 2155 2156 /* If this SFP module has a PHY, start the PHY now. */ 2157 if (pl->phydev) { 2158 phy_start(pl->phydev); 2159 return 0; 2160 } 2161 2162 /* If the module may have a PHY but we didn't detect one we 2163 * need to configure the MAC here. 2164 */ 2165 if (!pl->sfp_may_have_phy) 2166 return 0; 2167 2168 return phylink_sfp_config(pl, MLO_AN_INBAND, 2169 pl->sfp_support, pl->sfp_support); 2170 } 2171 2172 static void phylink_sfp_module_stop(void *upstream) 2173 { 2174 struct phylink *pl = upstream; 2175 2176 /* If this SFP module has a PHY, stop it. */ 2177 if (pl->phydev) 2178 phy_stop(pl->phydev); 2179 } 2180 2181 static void phylink_sfp_link_down(void *upstream) 2182 { 2183 struct phylink *pl = upstream; 2184 2185 ASSERT_RTNL(); 2186 2187 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_LINK); 2188 } 2189 2190 static void phylink_sfp_link_up(void *upstream) 2191 { 2192 struct phylink *pl = upstream; 2193 2194 ASSERT_RTNL(); 2195 2196 clear_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state); 2197 phylink_run_resolve(pl); 2198 } 2199 2200 /* The Broadcom BCM84881 in the Methode DM7052 is unable to provide a SGMII 2201 * or 802.3z control word, so inband will not work. 2202 */ 2203 static bool phylink_phy_no_inband(struct phy_device *phy) 2204 { 2205 return phy->is_c45 && 2206 (phy->c45_ids.device_ids[1] & 0xfffffff0) == 0xae025150; 2207 } 2208 2209 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy) 2210 { 2211 struct phylink *pl = upstream; 2212 phy_interface_t interface; 2213 u8 mode; 2214 int ret; 2215 2216 /* 2217 * This is the new way of dealing with flow control for PHYs, 2218 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 2219 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 2220 * using our validate call to the MAC, we rely upon the MAC 2221 * clearing the bits from both supported and advertising fields. 2222 */ 2223 phy_support_asym_pause(phy); 2224 2225 if (phylink_phy_no_inband(phy)) 2226 mode = MLO_AN_PHY; 2227 else 2228 mode = MLO_AN_INBAND; 2229 2230 /* Do the initial configuration */ 2231 ret = phylink_sfp_config(pl, mode, phy->supported, phy->advertising); 2232 if (ret < 0) 2233 return ret; 2234 2235 interface = pl->link_config.interface; 2236 ret = phylink_attach_phy(pl, phy, interface); 2237 if (ret < 0) 2238 return ret; 2239 2240 ret = phylink_bringup_phy(pl, phy, interface); 2241 if (ret) 2242 phy_detach(phy); 2243 2244 return ret; 2245 } 2246 2247 static void phylink_sfp_disconnect_phy(void *upstream) 2248 { 2249 phylink_disconnect_phy(upstream); 2250 } 2251 2252 static const struct sfp_upstream_ops sfp_phylink_ops = { 2253 .attach = phylink_sfp_attach, 2254 .detach = phylink_sfp_detach, 2255 .module_insert = phylink_sfp_module_insert, 2256 .module_start = phylink_sfp_module_start, 2257 .module_stop = phylink_sfp_module_stop, 2258 .link_up = phylink_sfp_link_up, 2259 .link_down = phylink_sfp_link_down, 2260 .connect_phy = phylink_sfp_connect_phy, 2261 .disconnect_phy = phylink_sfp_disconnect_phy, 2262 }; 2263 2264 /* Helpers for MAC drivers */ 2265 2266 /** 2267 * phylink_helper_basex_speed() - 1000BaseX/2500BaseX helper 2268 * @state: a pointer to a &struct phylink_link_state 2269 * 2270 * Inspect the interface mode, advertising mask or forced speed and 2271 * decide whether to run at 2.5Gbit or 1Gbit appropriately, switching 2272 * the interface mode to suit. @state->interface is appropriately 2273 * updated, and the advertising mask has the "other" baseX_Full flag 2274 * cleared. 2275 */ 2276 void phylink_helper_basex_speed(struct phylink_link_state *state) 2277 { 2278 if (phy_interface_mode_is_8023z(state->interface)) { 2279 bool want_2500 = state->an_enabled ? 2280 phylink_test(state->advertising, 2500baseX_Full) : 2281 state->speed == SPEED_2500; 2282 2283 if (want_2500) { 2284 phylink_clear(state->advertising, 1000baseX_Full); 2285 state->interface = PHY_INTERFACE_MODE_2500BASEX; 2286 } else { 2287 phylink_clear(state->advertising, 2500baseX_Full); 2288 state->interface = PHY_INTERFACE_MODE_1000BASEX; 2289 } 2290 } 2291 } 2292 EXPORT_SYMBOL_GPL(phylink_helper_basex_speed); 2293 2294 static void phylink_decode_c37_word(struct phylink_link_state *state, 2295 uint16_t config_reg, int speed) 2296 { 2297 bool tx_pause, rx_pause; 2298 int fd_bit; 2299 2300 if (speed == SPEED_2500) 2301 fd_bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT; 2302 else 2303 fd_bit = ETHTOOL_LINK_MODE_1000baseX_Full_BIT; 2304 2305 mii_lpa_mod_linkmode_x(state->lp_advertising, config_reg, fd_bit); 2306 2307 if (linkmode_test_bit(fd_bit, state->advertising) && 2308 linkmode_test_bit(fd_bit, state->lp_advertising)) { 2309 state->speed = speed; 2310 state->duplex = DUPLEX_FULL; 2311 } else { 2312 /* negotiation failure */ 2313 state->link = false; 2314 } 2315 2316 linkmode_resolve_pause(state->advertising, state->lp_advertising, 2317 &tx_pause, &rx_pause); 2318 2319 if (tx_pause) 2320 state->pause |= MLO_PAUSE_TX; 2321 if (rx_pause) 2322 state->pause |= MLO_PAUSE_RX; 2323 } 2324 2325 static void phylink_decode_sgmii_word(struct phylink_link_state *state, 2326 uint16_t config_reg) 2327 { 2328 if (!(config_reg & LPA_SGMII_LINK)) { 2329 state->link = false; 2330 return; 2331 } 2332 2333 switch (config_reg & LPA_SGMII_SPD_MASK) { 2334 case LPA_SGMII_10: 2335 state->speed = SPEED_10; 2336 break; 2337 case LPA_SGMII_100: 2338 state->speed = SPEED_100; 2339 break; 2340 case LPA_SGMII_1000: 2341 state->speed = SPEED_1000; 2342 break; 2343 default: 2344 state->link = false; 2345 return; 2346 } 2347 if (config_reg & LPA_SGMII_FULL_DUPLEX) 2348 state->duplex = DUPLEX_FULL; 2349 else 2350 state->duplex = DUPLEX_HALF; 2351 } 2352 2353 /** 2354 * phylink_decode_usxgmii_word() - decode the USXGMII word from a MAC PCS 2355 * @state: a pointer to a struct phylink_link_state. 2356 * @lpa: a 16 bit value which stores the USXGMII auto-negotiation word 2357 * 2358 * Helper for MAC PCS supporting the USXGMII protocol and the auto-negotiation 2359 * code word. Decode the USXGMII code word and populate the corresponding fields 2360 * (speed, duplex) into the phylink_link_state structure. 2361 */ 2362 void phylink_decode_usxgmii_word(struct phylink_link_state *state, 2363 uint16_t lpa) 2364 { 2365 switch (lpa & MDIO_USXGMII_SPD_MASK) { 2366 case MDIO_USXGMII_10: 2367 state->speed = SPEED_10; 2368 break; 2369 case MDIO_USXGMII_100: 2370 state->speed = SPEED_100; 2371 break; 2372 case MDIO_USXGMII_1000: 2373 state->speed = SPEED_1000; 2374 break; 2375 case MDIO_USXGMII_2500: 2376 state->speed = SPEED_2500; 2377 break; 2378 case MDIO_USXGMII_5000: 2379 state->speed = SPEED_5000; 2380 break; 2381 case MDIO_USXGMII_10G: 2382 state->speed = SPEED_10000; 2383 break; 2384 default: 2385 state->link = false; 2386 return; 2387 } 2388 2389 if (lpa & MDIO_USXGMII_FULL_DUPLEX) 2390 state->duplex = DUPLEX_FULL; 2391 else 2392 state->duplex = DUPLEX_HALF; 2393 } 2394 EXPORT_SYMBOL_GPL(phylink_decode_usxgmii_word); 2395 2396 /** 2397 * phylink_mii_c22_pcs_get_state() - read the MAC PCS state 2398 * @pcs: a pointer to a &struct mdio_device. 2399 * @state: a pointer to a &struct phylink_link_state. 2400 * 2401 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 2402 * clause 37 negotiation and/or SGMII control. 2403 * 2404 * Read the MAC PCS state from the MII device configured in @config and 2405 * parse the Clause 37 or Cisco SGMII link partner negotiation word into 2406 * the phylink @state structure. This is suitable to be directly plugged 2407 * into the mac_pcs_get_state() member of the struct phylink_mac_ops 2408 * structure. 2409 */ 2410 void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs, 2411 struct phylink_link_state *state) 2412 { 2413 struct mii_bus *bus = pcs->bus; 2414 int addr = pcs->addr; 2415 int bmsr, lpa; 2416 2417 bmsr = mdiobus_read(bus, addr, MII_BMSR); 2418 lpa = mdiobus_read(bus, addr, MII_LPA); 2419 if (bmsr < 0 || lpa < 0) { 2420 state->link = false; 2421 return; 2422 } 2423 2424 state->link = !!(bmsr & BMSR_LSTATUS); 2425 state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE); 2426 if (!state->link) 2427 return; 2428 2429 switch (state->interface) { 2430 case PHY_INTERFACE_MODE_1000BASEX: 2431 phylink_decode_c37_word(state, lpa, SPEED_1000); 2432 break; 2433 2434 case PHY_INTERFACE_MODE_2500BASEX: 2435 phylink_decode_c37_word(state, lpa, SPEED_2500); 2436 break; 2437 2438 case PHY_INTERFACE_MODE_SGMII: 2439 case PHY_INTERFACE_MODE_QSGMII: 2440 phylink_decode_sgmii_word(state, lpa); 2441 break; 2442 2443 default: 2444 state->link = false; 2445 break; 2446 } 2447 } 2448 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_get_state); 2449 2450 /** 2451 * phylink_mii_c22_pcs_set_advertisement() - configure the clause 37 PCS 2452 * advertisement 2453 * @pcs: a pointer to a &struct mdio_device. 2454 * @interface: the PHY interface mode being configured 2455 * @advertising: the ethtool advertisement mask 2456 * 2457 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 2458 * clause 37 negotiation and/or SGMII control. 2459 * 2460 * Configure the clause 37 PCS advertisement as specified by @state. This 2461 * does not trigger a renegotiation; phylink will do that via the 2462 * mac_an_restart() method of the struct phylink_mac_ops structure. 2463 * 2464 * Returns negative error code on failure to configure the advertisement, 2465 * zero if no change has been made, or one if the advertisement has changed. 2466 */ 2467 int phylink_mii_c22_pcs_set_advertisement(struct mdio_device *pcs, 2468 phy_interface_t interface, 2469 const unsigned long *advertising) 2470 { 2471 struct mii_bus *bus = pcs->bus; 2472 int addr = pcs->addr; 2473 int val, ret; 2474 u16 adv; 2475 2476 switch (interface) { 2477 case PHY_INTERFACE_MODE_1000BASEX: 2478 case PHY_INTERFACE_MODE_2500BASEX: 2479 adv = ADVERTISE_1000XFULL; 2480 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2481 advertising)) 2482 adv |= ADVERTISE_1000XPAUSE; 2483 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2484 advertising)) 2485 adv |= ADVERTISE_1000XPSE_ASYM; 2486 2487 val = mdiobus_read(bus, addr, MII_ADVERTISE); 2488 if (val < 0) 2489 return val; 2490 2491 if (val == adv) 2492 return 0; 2493 2494 ret = mdiobus_write(bus, addr, MII_ADVERTISE, adv); 2495 if (ret < 0) 2496 return ret; 2497 2498 return 1; 2499 2500 case PHY_INTERFACE_MODE_SGMII: 2501 val = mdiobus_read(bus, addr, MII_ADVERTISE); 2502 if (val < 0) 2503 return val; 2504 2505 if (val == 0x0001) 2506 return 0; 2507 2508 ret = mdiobus_write(bus, addr, MII_ADVERTISE, 0x0001); 2509 if (ret < 0) 2510 return ret; 2511 2512 return 1; 2513 2514 default: 2515 /* Nothing to do for other modes */ 2516 return 0; 2517 } 2518 } 2519 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_set_advertisement); 2520 2521 /** 2522 * phylink_mii_c22_pcs_config() - configure clause 22 PCS 2523 * @pcs: a pointer to a &struct mdio_device. 2524 * @mode: link autonegotiation mode 2525 * @interface: the PHY interface mode being configured 2526 * @advertising: the ethtool advertisement mask 2527 * 2528 * Configure a Clause 22 PCS PHY with the appropriate negotiation 2529 * parameters for the @mode, @interface and @advertising parameters. 2530 * Returns negative error number on failure, zero if the advertisement 2531 * has not changed, or positive if there is a change. 2532 */ 2533 int phylink_mii_c22_pcs_config(struct mdio_device *pcs, unsigned int mode, 2534 phy_interface_t interface, 2535 const unsigned long *advertising) 2536 { 2537 bool changed; 2538 u16 bmcr; 2539 int ret; 2540 2541 ret = phylink_mii_c22_pcs_set_advertisement(pcs, interface, 2542 advertising); 2543 if (ret < 0) 2544 return ret; 2545 2546 changed = ret > 0; 2547 2548 /* Ensure ISOLATE bit is disabled */ 2549 bmcr = mode == MLO_AN_INBAND ? BMCR_ANENABLE : 0; 2550 ret = mdiobus_modify(pcs->bus, pcs->addr, MII_BMCR, 2551 BMCR_ANENABLE | BMCR_ISOLATE, bmcr); 2552 if (ret < 0) 2553 return ret; 2554 2555 return changed ? 1 : 0; 2556 } 2557 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config); 2558 2559 /** 2560 * phylink_mii_c22_pcs_an_restart() - restart 802.3z autonegotiation 2561 * @pcs: a pointer to a &struct mdio_device. 2562 * 2563 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 2564 * clause 37 negotiation. 2565 * 2566 * Restart the clause 37 negotiation with the link partner. This is 2567 * suitable to be directly plugged into the mac_pcs_get_state() member 2568 * of the struct phylink_mac_ops structure. 2569 */ 2570 void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs) 2571 { 2572 struct mii_bus *bus = pcs->bus; 2573 int val, addr = pcs->addr; 2574 2575 val = mdiobus_read(bus, addr, MII_BMCR); 2576 if (val >= 0) { 2577 val |= BMCR_ANRESTART; 2578 2579 mdiobus_write(bus, addr, MII_BMCR, val); 2580 } 2581 } 2582 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_an_restart); 2583 2584 void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs, 2585 struct phylink_link_state *state) 2586 { 2587 struct mii_bus *bus = pcs->bus; 2588 int addr = pcs->addr; 2589 int stat; 2590 2591 stat = mdiobus_c45_read(bus, addr, MDIO_MMD_PCS, MDIO_STAT1); 2592 if (stat < 0) { 2593 state->link = false; 2594 return; 2595 } 2596 2597 state->link = !!(stat & MDIO_STAT1_LSTATUS); 2598 if (!state->link) 2599 return; 2600 2601 switch (state->interface) { 2602 case PHY_INTERFACE_MODE_10GBASER: 2603 state->speed = SPEED_10000; 2604 state->duplex = DUPLEX_FULL; 2605 break; 2606 2607 default: 2608 break; 2609 } 2610 } 2611 EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state); 2612 2613 MODULE_LICENSE("GPL v2"); 2614