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