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 PHYLINK_DISABLE_MAC_WOL, 37 }; 38 39 /** 40 * struct phylink - internal data type for phylink 41 */ 42 struct phylink { 43 /* private: */ 44 struct net_device *netdev; 45 const struct phylink_mac_ops *mac_ops; 46 const struct phylink_pcs_ops *pcs_ops; 47 struct phylink_config *config; 48 struct phylink_pcs *pcs; 49 struct device *dev; 50 unsigned int old_link_state:1; 51 52 unsigned long phylink_disable_state; /* bitmask of disables */ 53 struct phy_device *phydev; 54 phy_interface_t link_interface; /* PHY_INTERFACE_xxx */ 55 u8 cfg_link_an_mode; /* MLO_AN_xxx */ 56 u8 cur_link_an_mode; 57 u8 link_port; /* The current non-phy ethtool port */ 58 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 59 60 /* The link configuration settings */ 61 struct phylink_link_state link_config; 62 63 /* The current settings */ 64 phy_interface_t cur_interface; 65 66 struct gpio_desc *link_gpio; 67 unsigned int link_irq; 68 struct timer_list link_poll; 69 void (*get_fixed_state)(struct net_device *dev, 70 struct phylink_link_state *s); 71 72 struct mutex state_mutex; 73 struct phylink_link_state phy_state; 74 struct work_struct resolve; 75 76 bool mac_link_dropped; 77 78 struct sfp_bus *sfp_bus; 79 bool sfp_may_have_phy; 80 __ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support); 81 u8 sfp_port; 82 }; 83 84 #define phylink_printk(level, pl, fmt, ...) \ 85 do { \ 86 if ((pl)->config->type == PHYLINK_NETDEV) \ 87 netdev_printk(level, (pl)->netdev, fmt, ##__VA_ARGS__); \ 88 else if ((pl)->config->type == PHYLINK_DEV) \ 89 dev_printk(level, (pl)->dev, fmt, ##__VA_ARGS__); \ 90 } while (0) 91 92 #define phylink_err(pl, fmt, ...) \ 93 phylink_printk(KERN_ERR, pl, fmt, ##__VA_ARGS__) 94 #define phylink_warn(pl, fmt, ...) \ 95 phylink_printk(KERN_WARNING, pl, fmt, ##__VA_ARGS__) 96 #define phylink_info(pl, fmt, ...) \ 97 phylink_printk(KERN_INFO, pl, fmt, ##__VA_ARGS__) 98 #if defined(CONFIG_DYNAMIC_DEBUG) 99 #define phylink_dbg(pl, fmt, ...) \ 100 do { \ 101 if ((pl)->config->type == PHYLINK_NETDEV) \ 102 netdev_dbg((pl)->netdev, fmt, ##__VA_ARGS__); \ 103 else if ((pl)->config->type == PHYLINK_DEV) \ 104 dev_dbg((pl)->dev, fmt, ##__VA_ARGS__); \ 105 } while (0) 106 #elif defined(DEBUG) 107 #define phylink_dbg(pl, fmt, ...) \ 108 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__) 109 #else 110 #define phylink_dbg(pl, fmt, ...) \ 111 ({ \ 112 if (0) \ 113 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__); \ 114 }) 115 #endif 116 117 /** 118 * phylink_set_port_modes() - set the port type modes in the ethtool mask 119 * @mask: ethtool link mode mask 120 * 121 * Sets all the port type modes in the ethtool mask. MAC drivers should 122 * use this in their 'validate' callback. 123 */ 124 void phylink_set_port_modes(unsigned long *mask) 125 { 126 phylink_set(mask, TP); 127 phylink_set(mask, AUI); 128 phylink_set(mask, MII); 129 phylink_set(mask, FIBRE); 130 phylink_set(mask, BNC); 131 phylink_set(mask, Backplane); 132 } 133 EXPORT_SYMBOL_GPL(phylink_set_port_modes); 134 135 void phylink_set_10g_modes(unsigned long *mask) 136 { 137 phylink_set(mask, 10000baseT_Full); 138 phylink_set(mask, 10000baseCR_Full); 139 phylink_set(mask, 10000baseSR_Full); 140 phylink_set(mask, 10000baseLR_Full); 141 phylink_set(mask, 10000baseLRM_Full); 142 phylink_set(mask, 10000baseER_Full); 143 } 144 EXPORT_SYMBOL_GPL(phylink_set_10g_modes); 145 146 static int phylink_is_empty_linkmode(const unsigned long *linkmode) 147 { 148 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, }; 149 150 phylink_set_port_modes(tmp); 151 phylink_set(tmp, Autoneg); 152 phylink_set(tmp, Pause); 153 phylink_set(tmp, Asym_Pause); 154 155 return linkmode_subset(linkmode, tmp); 156 } 157 158 static const char *phylink_an_mode_str(unsigned int mode) 159 { 160 static const char *modestr[] = { 161 [MLO_AN_PHY] = "phy", 162 [MLO_AN_FIXED] = "fixed", 163 [MLO_AN_INBAND] = "inband", 164 }; 165 166 return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown"; 167 } 168 169 static int phylink_validate(struct phylink *pl, unsigned long *supported, 170 struct phylink_link_state *state) 171 { 172 pl->mac_ops->validate(pl->config, supported, state); 173 174 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; 175 } 176 177 static int phylink_parse_fixedlink(struct phylink *pl, 178 struct fwnode_handle *fwnode) 179 { 180 struct fwnode_handle *fixed_node; 181 const struct phy_setting *s; 182 struct gpio_desc *desc; 183 u32 speed; 184 int ret; 185 186 fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link"); 187 if (fixed_node) { 188 ret = fwnode_property_read_u32(fixed_node, "speed", &speed); 189 190 pl->link_config.speed = speed; 191 pl->link_config.duplex = DUPLEX_HALF; 192 193 if (fwnode_property_read_bool(fixed_node, "full-duplex")) 194 pl->link_config.duplex = DUPLEX_FULL; 195 196 /* We treat the "pause" and "asym-pause" terminology as 197 * defining the link partner's ability. 198 */ 199 if (fwnode_property_read_bool(fixed_node, "pause")) 200 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 201 pl->link_config.lp_advertising); 202 if (fwnode_property_read_bool(fixed_node, "asym-pause")) 203 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 204 pl->link_config.lp_advertising); 205 206 if (ret == 0) { 207 desc = fwnode_gpiod_get_index(fixed_node, "link", 0, 208 GPIOD_IN, "?"); 209 210 if (!IS_ERR(desc)) 211 pl->link_gpio = desc; 212 else if (desc == ERR_PTR(-EPROBE_DEFER)) 213 ret = -EPROBE_DEFER; 214 } 215 fwnode_handle_put(fixed_node); 216 217 if (ret) 218 return ret; 219 } else { 220 u32 prop[5]; 221 222 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 223 NULL, 0); 224 if (ret != ARRAY_SIZE(prop)) { 225 phylink_err(pl, "broken fixed-link?\n"); 226 return -EINVAL; 227 } 228 229 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 230 prop, ARRAY_SIZE(prop)); 231 if (!ret) { 232 pl->link_config.duplex = prop[1] ? 233 DUPLEX_FULL : DUPLEX_HALF; 234 pl->link_config.speed = prop[2]; 235 if (prop[3]) 236 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 237 pl->link_config.lp_advertising); 238 if (prop[4]) 239 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 240 pl->link_config.lp_advertising); 241 } 242 } 243 244 if (pl->link_config.speed > SPEED_1000 && 245 pl->link_config.duplex != DUPLEX_FULL) 246 phylink_warn(pl, "fixed link specifies half duplex for %dMbps link?\n", 247 pl->link_config.speed); 248 249 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 250 linkmode_copy(pl->link_config.advertising, pl->supported); 251 phylink_validate(pl, pl->supported, &pl->link_config); 252 253 s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex, 254 pl->supported, true); 255 linkmode_zero(pl->supported); 256 phylink_set(pl->supported, MII); 257 phylink_set(pl->supported, Pause); 258 phylink_set(pl->supported, Asym_Pause); 259 phylink_set(pl->supported, Autoneg); 260 if (s) { 261 __set_bit(s->bit, pl->supported); 262 __set_bit(s->bit, pl->link_config.lp_advertising); 263 } else { 264 phylink_warn(pl, "fixed link %s duplex %dMbps not recognised\n", 265 pl->link_config.duplex == DUPLEX_FULL ? "full" : "half", 266 pl->link_config.speed); 267 } 268 269 linkmode_and(pl->link_config.advertising, pl->link_config.advertising, 270 pl->supported); 271 272 pl->link_config.link = 1; 273 pl->link_config.an_complete = 1; 274 275 return 0; 276 } 277 278 static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode) 279 { 280 struct fwnode_handle *dn; 281 const char *managed; 282 283 dn = fwnode_get_named_child_node(fwnode, "fixed-link"); 284 if (dn || fwnode_property_present(fwnode, "fixed-link")) 285 pl->cfg_link_an_mode = MLO_AN_FIXED; 286 fwnode_handle_put(dn); 287 288 if ((fwnode_property_read_string(fwnode, "managed", &managed) == 0 && 289 strcmp(managed, "in-band-status") == 0) || 290 pl->config->ovr_an_inband) { 291 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 292 phylink_err(pl, 293 "can't use both fixed-link and in-band-status\n"); 294 return -EINVAL; 295 } 296 297 linkmode_zero(pl->supported); 298 phylink_set(pl->supported, MII); 299 phylink_set(pl->supported, Autoneg); 300 phylink_set(pl->supported, Asym_Pause); 301 phylink_set(pl->supported, Pause); 302 pl->link_config.an_enabled = true; 303 pl->cfg_link_an_mode = MLO_AN_INBAND; 304 305 switch (pl->link_config.interface) { 306 case PHY_INTERFACE_MODE_SGMII: 307 case PHY_INTERFACE_MODE_QSGMII: 308 phylink_set(pl->supported, 10baseT_Half); 309 phylink_set(pl->supported, 10baseT_Full); 310 phylink_set(pl->supported, 100baseT_Half); 311 phylink_set(pl->supported, 100baseT_Full); 312 phylink_set(pl->supported, 1000baseT_Half); 313 phylink_set(pl->supported, 1000baseT_Full); 314 break; 315 316 case PHY_INTERFACE_MODE_1000BASEX: 317 phylink_set(pl->supported, 1000baseX_Full); 318 break; 319 320 case PHY_INTERFACE_MODE_2500BASEX: 321 phylink_set(pl->supported, 2500baseX_Full); 322 break; 323 324 case PHY_INTERFACE_MODE_5GBASER: 325 phylink_set(pl->supported, 5000baseT_Full); 326 break; 327 328 case PHY_INTERFACE_MODE_25GBASER: 329 phylink_set(pl->supported, 25000baseCR_Full); 330 phylink_set(pl->supported, 25000baseKR_Full); 331 phylink_set(pl->supported, 25000baseSR_Full); 332 fallthrough; 333 case PHY_INTERFACE_MODE_USXGMII: 334 case PHY_INTERFACE_MODE_10GKR: 335 case PHY_INTERFACE_MODE_10GBASER: 336 phylink_set(pl->supported, 10baseT_Half); 337 phylink_set(pl->supported, 10baseT_Full); 338 phylink_set(pl->supported, 100baseT_Half); 339 phylink_set(pl->supported, 100baseT_Full); 340 phylink_set(pl->supported, 1000baseT_Half); 341 phylink_set(pl->supported, 1000baseT_Full); 342 phylink_set(pl->supported, 1000baseX_Full); 343 phylink_set(pl->supported, 1000baseKX_Full); 344 phylink_set(pl->supported, 2500baseT_Full); 345 phylink_set(pl->supported, 2500baseX_Full); 346 phylink_set(pl->supported, 5000baseT_Full); 347 phylink_set(pl->supported, 10000baseT_Full); 348 phylink_set(pl->supported, 10000baseKR_Full); 349 phylink_set(pl->supported, 10000baseKX4_Full); 350 phylink_set(pl->supported, 10000baseCR_Full); 351 phylink_set(pl->supported, 10000baseSR_Full); 352 phylink_set(pl->supported, 10000baseLR_Full); 353 phylink_set(pl->supported, 10000baseLRM_Full); 354 phylink_set(pl->supported, 10000baseER_Full); 355 break; 356 357 case PHY_INTERFACE_MODE_XLGMII: 358 phylink_set(pl->supported, 25000baseCR_Full); 359 phylink_set(pl->supported, 25000baseKR_Full); 360 phylink_set(pl->supported, 25000baseSR_Full); 361 phylink_set(pl->supported, 40000baseKR4_Full); 362 phylink_set(pl->supported, 40000baseCR4_Full); 363 phylink_set(pl->supported, 40000baseSR4_Full); 364 phylink_set(pl->supported, 40000baseLR4_Full); 365 phylink_set(pl->supported, 50000baseCR2_Full); 366 phylink_set(pl->supported, 50000baseKR2_Full); 367 phylink_set(pl->supported, 50000baseSR2_Full); 368 phylink_set(pl->supported, 50000baseKR_Full); 369 phylink_set(pl->supported, 50000baseSR_Full); 370 phylink_set(pl->supported, 50000baseCR_Full); 371 phylink_set(pl->supported, 50000baseLR_ER_FR_Full); 372 phylink_set(pl->supported, 50000baseDR_Full); 373 phylink_set(pl->supported, 100000baseKR4_Full); 374 phylink_set(pl->supported, 100000baseSR4_Full); 375 phylink_set(pl->supported, 100000baseCR4_Full); 376 phylink_set(pl->supported, 100000baseLR4_ER4_Full); 377 phylink_set(pl->supported, 100000baseKR2_Full); 378 phylink_set(pl->supported, 100000baseSR2_Full); 379 phylink_set(pl->supported, 100000baseCR2_Full); 380 phylink_set(pl->supported, 100000baseLR2_ER2_FR2_Full); 381 phylink_set(pl->supported, 100000baseDR2_Full); 382 break; 383 384 default: 385 phylink_err(pl, 386 "incorrect link mode %s for in-band status\n", 387 phy_modes(pl->link_config.interface)); 388 return -EINVAL; 389 } 390 391 linkmode_copy(pl->link_config.advertising, pl->supported); 392 393 if (phylink_validate(pl, pl->supported, &pl->link_config)) { 394 phylink_err(pl, 395 "failed to validate link configuration for in-band status\n"); 396 return -EINVAL; 397 } 398 399 /* Check if MAC/PCS also supports Autoneg. */ 400 pl->link_config.an_enabled = phylink_test(pl->supported, Autoneg); 401 } 402 403 return 0; 404 } 405 406 static void phylink_apply_manual_flow(struct phylink *pl, 407 struct phylink_link_state *state) 408 { 409 /* If autoneg is disabled, pause AN is also disabled */ 410 if (!state->an_enabled) 411 state->pause &= ~MLO_PAUSE_AN; 412 413 /* Manual configuration of pause modes */ 414 if (!(pl->link_config.pause & MLO_PAUSE_AN)) 415 state->pause = pl->link_config.pause; 416 } 417 418 static void phylink_resolve_flow(struct phylink_link_state *state) 419 { 420 bool tx_pause, rx_pause; 421 422 state->pause = MLO_PAUSE_NONE; 423 if (state->duplex == DUPLEX_FULL) { 424 linkmode_resolve_pause(state->advertising, 425 state->lp_advertising, 426 &tx_pause, &rx_pause); 427 if (tx_pause) 428 state->pause |= MLO_PAUSE_TX; 429 if (rx_pause) 430 state->pause |= MLO_PAUSE_RX; 431 } 432 } 433 434 static void phylink_mac_config(struct phylink *pl, 435 const struct phylink_link_state *state) 436 { 437 phylink_dbg(pl, 438 "%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n", 439 __func__, phylink_an_mode_str(pl->cur_link_an_mode), 440 phy_modes(state->interface), 441 phy_speed_to_str(state->speed), 442 phy_duplex_to_str(state->duplex), 443 __ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising, 444 state->pause, state->link, state->an_enabled); 445 446 pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, state); 447 } 448 449 static void phylink_mac_pcs_an_restart(struct phylink *pl) 450 { 451 if (pl->link_config.an_enabled && 452 phy_interface_mode_is_8023z(pl->link_config.interface) && 453 phylink_autoneg_inband(pl->cur_link_an_mode)) { 454 if (pl->pcs_ops) 455 pl->pcs_ops->pcs_an_restart(pl->pcs); 456 else 457 pl->mac_ops->mac_an_restart(pl->config); 458 } 459 } 460 461 static void phylink_major_config(struct phylink *pl, bool restart, 462 const struct phylink_link_state *state) 463 { 464 int err; 465 466 phylink_dbg(pl, "major config %s\n", phy_modes(state->interface)); 467 468 if (pl->mac_ops->mac_prepare) { 469 err = pl->mac_ops->mac_prepare(pl->config, pl->cur_link_an_mode, 470 state->interface); 471 if (err < 0) { 472 phylink_err(pl, "mac_prepare failed: %pe\n", 473 ERR_PTR(err)); 474 return; 475 } 476 } 477 478 phylink_mac_config(pl, state); 479 480 if (pl->pcs_ops) { 481 err = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode, 482 state->interface, 483 state->advertising, 484 !!(pl->link_config.pause & 485 MLO_PAUSE_AN)); 486 if (err < 0) 487 phylink_err(pl, "pcs_config failed: %pe\n", 488 ERR_PTR(err)); 489 if (err > 0) 490 restart = true; 491 } 492 if (restart) 493 phylink_mac_pcs_an_restart(pl); 494 495 if (pl->mac_ops->mac_finish) { 496 err = pl->mac_ops->mac_finish(pl->config, pl->cur_link_an_mode, 497 state->interface); 498 if (err < 0) 499 phylink_err(pl, "mac_finish failed: %pe\n", 500 ERR_PTR(err)); 501 } 502 } 503 504 /* 505 * Reconfigure for a change of inband advertisement. 506 * If we have a separate PCS, we only need to call its pcs_config() method, 507 * and then restart AN if it indicates something changed. Otherwise, we do 508 * the full MAC reconfiguration. 509 */ 510 static int phylink_change_inband_advert(struct phylink *pl) 511 { 512 int ret; 513 514 if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) 515 return 0; 516 517 if (!pl->pcs_ops) { 518 /* Legacy method */ 519 phylink_mac_config(pl, &pl->link_config); 520 phylink_mac_pcs_an_restart(pl); 521 return 0; 522 } 523 524 phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__, 525 phylink_an_mode_str(pl->cur_link_an_mode), 526 phy_modes(pl->link_config.interface), 527 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->link_config.advertising, 528 pl->link_config.pause); 529 530 /* Modern PCS-based method; update the advert at the PCS, and 531 * restart negotiation if the pcs_config() helper indicates that 532 * the programmed advertisement has changed. 533 */ 534 ret = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode, 535 pl->link_config.interface, 536 pl->link_config.advertising, 537 !!(pl->link_config.pause & MLO_PAUSE_AN)); 538 if (ret < 0) 539 return ret; 540 541 if (ret > 0) 542 phylink_mac_pcs_an_restart(pl); 543 544 return 0; 545 } 546 547 static void phylink_mac_pcs_get_state(struct phylink *pl, 548 struct phylink_link_state *state) 549 { 550 linkmode_copy(state->advertising, pl->link_config.advertising); 551 linkmode_zero(state->lp_advertising); 552 state->interface = pl->link_config.interface; 553 state->an_enabled = pl->link_config.an_enabled; 554 state->speed = SPEED_UNKNOWN; 555 state->duplex = DUPLEX_UNKNOWN; 556 state->pause = MLO_PAUSE_NONE; 557 state->an_complete = 0; 558 state->link = 1; 559 560 if (pl->pcs_ops) 561 pl->pcs_ops->pcs_get_state(pl->pcs, state); 562 else if (pl->mac_ops->mac_pcs_get_state) 563 pl->mac_ops->mac_pcs_get_state(pl->config, state); 564 else 565 state->link = 0; 566 } 567 568 /* The fixed state is... fixed except for the link state, 569 * which may be determined by a GPIO or a callback. 570 */ 571 static void phylink_get_fixed_state(struct phylink *pl, 572 struct phylink_link_state *state) 573 { 574 *state = pl->link_config; 575 if (pl->config->get_fixed_state) 576 pl->config->get_fixed_state(pl->config, state); 577 else if (pl->link_gpio) 578 state->link = !!gpiod_get_value_cansleep(pl->link_gpio); 579 580 phylink_resolve_flow(state); 581 } 582 583 static void phylink_mac_initial_config(struct phylink *pl, bool force_restart) 584 { 585 struct phylink_link_state link_state; 586 587 switch (pl->cur_link_an_mode) { 588 case MLO_AN_PHY: 589 link_state = pl->phy_state; 590 break; 591 592 case MLO_AN_FIXED: 593 phylink_get_fixed_state(pl, &link_state); 594 break; 595 596 case MLO_AN_INBAND: 597 link_state = pl->link_config; 598 if (link_state.interface == PHY_INTERFACE_MODE_SGMII) 599 link_state.pause = MLO_PAUSE_NONE; 600 break; 601 602 default: /* can't happen */ 603 return; 604 } 605 606 link_state.link = false; 607 608 phylink_apply_manual_flow(pl, &link_state); 609 phylink_major_config(pl, force_restart, &link_state); 610 } 611 612 static const char *phylink_pause_to_str(int pause) 613 { 614 switch (pause & MLO_PAUSE_TXRX_MASK) { 615 case MLO_PAUSE_TX | MLO_PAUSE_RX: 616 return "rx/tx"; 617 case MLO_PAUSE_TX: 618 return "tx"; 619 case MLO_PAUSE_RX: 620 return "rx"; 621 default: 622 return "off"; 623 } 624 } 625 626 static void phylink_link_up(struct phylink *pl, 627 struct phylink_link_state link_state) 628 { 629 struct net_device *ndev = pl->netdev; 630 631 pl->cur_interface = link_state.interface; 632 633 if (pl->pcs_ops && pl->pcs_ops->pcs_link_up) 634 pl->pcs_ops->pcs_link_up(pl->pcs, pl->cur_link_an_mode, 635 pl->cur_interface, 636 link_state.speed, link_state.duplex); 637 638 pl->mac_ops->mac_link_up(pl->config, pl->phydev, 639 pl->cur_link_an_mode, pl->cur_interface, 640 link_state.speed, link_state.duplex, 641 !!(link_state.pause & MLO_PAUSE_TX), 642 !!(link_state.pause & MLO_PAUSE_RX)); 643 644 if (ndev) 645 netif_carrier_on(ndev); 646 647 phylink_info(pl, 648 "Link is Up - %s/%s - flow control %s\n", 649 phy_speed_to_str(link_state.speed), 650 phy_duplex_to_str(link_state.duplex), 651 phylink_pause_to_str(link_state.pause)); 652 } 653 654 static void phylink_link_down(struct phylink *pl) 655 { 656 struct net_device *ndev = pl->netdev; 657 658 if (ndev) 659 netif_carrier_off(ndev); 660 pl->mac_ops->mac_link_down(pl->config, pl->cur_link_an_mode, 661 pl->cur_interface); 662 phylink_info(pl, "Link is Down\n"); 663 } 664 665 static void phylink_resolve(struct work_struct *w) 666 { 667 struct phylink *pl = container_of(w, struct phylink, resolve); 668 struct phylink_link_state link_state; 669 struct net_device *ndev = pl->netdev; 670 bool mac_config = false; 671 bool cur_link_state; 672 673 mutex_lock(&pl->state_mutex); 674 if (pl->netdev) 675 cur_link_state = netif_carrier_ok(ndev); 676 else 677 cur_link_state = pl->old_link_state; 678 679 if (pl->phylink_disable_state) { 680 pl->mac_link_dropped = false; 681 link_state.link = false; 682 } else if (pl->mac_link_dropped) { 683 link_state.link = false; 684 } else { 685 switch (pl->cur_link_an_mode) { 686 case MLO_AN_PHY: 687 link_state = pl->phy_state; 688 phylink_apply_manual_flow(pl, &link_state); 689 mac_config = link_state.link; 690 break; 691 692 case MLO_AN_FIXED: 693 phylink_get_fixed_state(pl, &link_state); 694 mac_config = link_state.link; 695 break; 696 697 case MLO_AN_INBAND: 698 phylink_mac_pcs_get_state(pl, &link_state); 699 700 /* If we have a phy, the "up" state is the union of 701 * both the PHY and the MAC 702 */ 703 if (pl->phydev) 704 link_state.link &= pl->phy_state.link; 705 706 /* Only update if the PHY link is up */ 707 if (pl->phydev && pl->phy_state.link) { 708 link_state.interface = pl->phy_state.interface; 709 710 /* If we have a PHY, we need to update with 711 * the PHY flow control bits. 712 */ 713 link_state.pause = pl->phy_state.pause; 714 mac_config = true; 715 } 716 phylink_apply_manual_flow(pl, &link_state); 717 break; 718 } 719 } 720 721 if (mac_config) { 722 if (link_state.interface != pl->link_config.interface) { 723 /* The interface has changed, force the link down and 724 * then reconfigure. 725 */ 726 if (cur_link_state) { 727 phylink_link_down(pl); 728 cur_link_state = false; 729 } 730 phylink_major_config(pl, false, &link_state); 731 pl->link_config.interface = link_state.interface; 732 } else if (!pl->pcs_ops) { 733 /* The interface remains unchanged, only the speed, 734 * duplex or pause settings have changed. Call the 735 * old mac_config() method to configure the MAC/PCS 736 * only if we do not have a PCS installed (an 737 * unconverted user.) 738 */ 739 phylink_mac_config(pl, &link_state); 740 } 741 } 742 743 if (link_state.link != cur_link_state) { 744 pl->old_link_state = link_state.link; 745 if (!link_state.link) 746 phylink_link_down(pl); 747 else 748 phylink_link_up(pl, link_state); 749 } 750 if (!link_state.link && pl->mac_link_dropped) { 751 pl->mac_link_dropped = false; 752 queue_work(system_power_efficient_wq, &pl->resolve); 753 } 754 mutex_unlock(&pl->state_mutex); 755 } 756 757 static void phylink_run_resolve(struct phylink *pl) 758 { 759 if (!pl->phylink_disable_state) 760 queue_work(system_power_efficient_wq, &pl->resolve); 761 } 762 763 static void phylink_run_resolve_and_disable(struct phylink *pl, int bit) 764 { 765 unsigned long state = pl->phylink_disable_state; 766 767 set_bit(bit, &pl->phylink_disable_state); 768 if (state == 0) { 769 queue_work(system_power_efficient_wq, &pl->resolve); 770 flush_work(&pl->resolve); 771 } 772 } 773 774 static void phylink_fixed_poll(struct timer_list *t) 775 { 776 struct phylink *pl = container_of(t, struct phylink, link_poll); 777 778 mod_timer(t, jiffies + HZ); 779 780 phylink_run_resolve(pl); 781 } 782 783 static const struct sfp_upstream_ops sfp_phylink_ops; 784 785 static int phylink_register_sfp(struct phylink *pl, 786 struct fwnode_handle *fwnode) 787 { 788 struct sfp_bus *bus; 789 int ret; 790 791 if (!fwnode) 792 return 0; 793 794 bus = sfp_bus_find_fwnode(fwnode); 795 if (IS_ERR(bus)) { 796 ret = PTR_ERR(bus); 797 phylink_err(pl, "unable to attach SFP bus: %d\n", ret); 798 return ret; 799 } 800 801 pl->sfp_bus = bus; 802 803 ret = sfp_bus_add_upstream(bus, pl, &sfp_phylink_ops); 804 sfp_bus_put(bus); 805 806 return ret; 807 } 808 809 /** 810 * phylink_create() - create a phylink instance 811 * @config: a pointer to the target &struct phylink_config 812 * @fwnode: a pointer to a &struct fwnode_handle describing the network 813 * interface 814 * @iface: the desired link mode defined by &typedef phy_interface_t 815 * @mac_ops: a pointer to a &struct phylink_mac_ops for the MAC. 816 * 817 * Create a new phylink instance, and parse the link parameters found in @np. 818 * This will parse in-band modes, fixed-link or SFP configuration. 819 * 820 * Note: the rtnl lock must not be held when calling this function. 821 * 822 * Returns a pointer to a &struct phylink, or an error-pointer value. Users 823 * must use IS_ERR() to check for errors from this function. 824 */ 825 struct phylink *phylink_create(struct phylink_config *config, 826 struct fwnode_handle *fwnode, 827 phy_interface_t iface, 828 const struct phylink_mac_ops *mac_ops) 829 { 830 struct phylink *pl; 831 int ret; 832 833 pl = kzalloc(sizeof(*pl), GFP_KERNEL); 834 if (!pl) 835 return ERR_PTR(-ENOMEM); 836 837 mutex_init(&pl->state_mutex); 838 INIT_WORK(&pl->resolve, phylink_resolve); 839 840 pl->config = config; 841 if (config->type == PHYLINK_NETDEV) { 842 pl->netdev = to_net_dev(config->dev); 843 } else if (config->type == PHYLINK_DEV) { 844 pl->dev = config->dev; 845 } else { 846 kfree(pl); 847 return ERR_PTR(-EINVAL); 848 } 849 850 pl->phy_state.interface = iface; 851 pl->link_interface = iface; 852 if (iface == PHY_INTERFACE_MODE_MOCA) 853 pl->link_port = PORT_BNC; 854 else 855 pl->link_port = PORT_MII; 856 pl->link_config.interface = iface; 857 pl->link_config.pause = MLO_PAUSE_AN; 858 pl->link_config.speed = SPEED_UNKNOWN; 859 pl->link_config.duplex = DUPLEX_UNKNOWN; 860 pl->link_config.an_enabled = true; 861 pl->mac_ops = mac_ops; 862 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 863 timer_setup(&pl->link_poll, phylink_fixed_poll, 0); 864 865 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 866 linkmode_copy(pl->link_config.advertising, pl->supported); 867 phylink_validate(pl, pl->supported, &pl->link_config); 868 869 ret = phylink_parse_mode(pl, fwnode); 870 if (ret < 0) { 871 kfree(pl); 872 return ERR_PTR(ret); 873 } 874 875 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 876 ret = phylink_parse_fixedlink(pl, fwnode); 877 if (ret < 0) { 878 kfree(pl); 879 return ERR_PTR(ret); 880 } 881 } 882 883 pl->cur_link_an_mode = pl->cfg_link_an_mode; 884 885 ret = phylink_register_sfp(pl, fwnode); 886 if (ret < 0) { 887 kfree(pl); 888 return ERR_PTR(ret); 889 } 890 891 return pl; 892 } 893 EXPORT_SYMBOL_GPL(phylink_create); 894 895 /** 896 * phylink_set_pcs() - set the current PCS for phylink to use 897 * @pl: a pointer to a &struct phylink returned from phylink_create() 898 * @pcs: a pointer to the &struct phylink_pcs 899 * 900 * Bind the MAC PCS to phylink. This may be called after phylink_create(), 901 * in mac_prepare() or mac_config() methods if it is desired to dynamically 902 * change the PCS. 903 * 904 * Please note that there are behavioural changes with the mac_config() 905 * callback if a PCS is present (denoting a newer setup) so removing a PCS 906 * is not supported, and if a PCS is going to be used, it must be registered 907 * by calling phylink_set_pcs() at the latest in the first mac_config() call. 908 */ 909 void phylink_set_pcs(struct phylink *pl, struct phylink_pcs *pcs) 910 { 911 pl->pcs = pcs; 912 pl->pcs_ops = pcs->ops; 913 } 914 EXPORT_SYMBOL_GPL(phylink_set_pcs); 915 916 /** 917 * phylink_destroy() - cleanup and destroy the phylink instance 918 * @pl: a pointer to a &struct phylink returned from phylink_create() 919 * 920 * Destroy a phylink instance. Any PHY that has been attached must have been 921 * cleaned up via phylink_disconnect_phy() prior to calling this function. 922 * 923 * Note: the rtnl lock must not be held when calling this function. 924 */ 925 void phylink_destroy(struct phylink *pl) 926 { 927 sfp_bus_del_upstream(pl->sfp_bus); 928 if (pl->link_gpio) 929 gpiod_put(pl->link_gpio); 930 931 cancel_work_sync(&pl->resolve); 932 kfree(pl); 933 } 934 EXPORT_SYMBOL_GPL(phylink_destroy); 935 936 static void phylink_phy_change(struct phy_device *phydev, bool up) 937 { 938 struct phylink *pl = phydev->phylink; 939 bool tx_pause, rx_pause; 940 941 phy_get_pause(phydev, &tx_pause, &rx_pause); 942 943 mutex_lock(&pl->state_mutex); 944 pl->phy_state.speed = phydev->speed; 945 pl->phy_state.duplex = phydev->duplex; 946 pl->phy_state.pause = MLO_PAUSE_NONE; 947 if (tx_pause) 948 pl->phy_state.pause |= MLO_PAUSE_TX; 949 if (rx_pause) 950 pl->phy_state.pause |= MLO_PAUSE_RX; 951 pl->phy_state.interface = phydev->interface; 952 pl->phy_state.link = up; 953 mutex_unlock(&pl->state_mutex); 954 955 phylink_run_resolve(pl); 956 957 phylink_dbg(pl, "phy link %s %s/%s/%s/%s\n", up ? "up" : "down", 958 phy_modes(phydev->interface), 959 phy_speed_to_str(phydev->speed), 960 phy_duplex_to_str(phydev->duplex), 961 phylink_pause_to_str(pl->phy_state.pause)); 962 } 963 964 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy, 965 phy_interface_t interface) 966 { 967 struct phylink_link_state config; 968 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 969 char *irq_str; 970 int ret; 971 972 /* 973 * This is the new way of dealing with flow control for PHYs, 974 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 975 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 976 * using our validate call to the MAC, we rely upon the MAC 977 * clearing the bits from both supported and advertising fields. 978 */ 979 phy_support_asym_pause(phy); 980 981 memset(&config, 0, sizeof(config)); 982 linkmode_copy(supported, phy->supported); 983 linkmode_copy(config.advertising, phy->advertising); 984 985 /* Clause 45 PHYs switch their Serdes lane between several different 986 * modes, normally 10GBASE-R, SGMII. Some use 2500BASE-X for 2.5G 987 * speeds. We really need to know which interface modes the PHY and 988 * MAC supports to properly work out which linkmodes can be supported. 989 */ 990 if (phy->is_c45 && 991 interface != PHY_INTERFACE_MODE_RXAUI && 992 interface != PHY_INTERFACE_MODE_XAUI && 993 interface != PHY_INTERFACE_MODE_USXGMII) 994 config.interface = PHY_INTERFACE_MODE_NA; 995 else 996 config.interface = interface; 997 998 ret = phylink_validate(pl, supported, &config); 999 if (ret) { 1000 phylink_warn(pl, "validation of %s with support %*pb and advertisement %*pb failed: %d\n", 1001 phy_modes(config.interface), 1002 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->supported, 1003 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising, 1004 ret); 1005 return ret; 1006 } 1007 1008 phy->phylink = pl; 1009 phy->phy_link_change = phylink_phy_change; 1010 1011 irq_str = phy_attached_info_irq(phy); 1012 phylink_info(pl, 1013 "PHY [%s] driver [%s] (irq=%s)\n", 1014 dev_name(&phy->mdio.dev), phy->drv->name, irq_str); 1015 kfree(irq_str); 1016 1017 mutex_lock(&phy->lock); 1018 mutex_lock(&pl->state_mutex); 1019 pl->phydev = phy; 1020 pl->phy_state.interface = interface; 1021 pl->phy_state.pause = MLO_PAUSE_NONE; 1022 pl->phy_state.speed = SPEED_UNKNOWN; 1023 pl->phy_state.duplex = DUPLEX_UNKNOWN; 1024 linkmode_copy(pl->supported, supported); 1025 linkmode_copy(pl->link_config.advertising, config.advertising); 1026 1027 /* Restrict the phy advertisement according to the MAC support. */ 1028 linkmode_copy(phy->advertising, config.advertising); 1029 mutex_unlock(&pl->state_mutex); 1030 mutex_unlock(&phy->lock); 1031 1032 phylink_dbg(pl, 1033 "phy: setting supported %*pb advertising %*pb\n", 1034 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported, 1035 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising); 1036 1037 if (phy_interrupt_is_valid(phy)) 1038 phy_request_interrupt(phy); 1039 1040 return 0; 1041 } 1042 1043 static int phylink_attach_phy(struct phylink *pl, struct phy_device *phy, 1044 phy_interface_t interface) 1045 { 1046 if (WARN_ON(pl->cfg_link_an_mode == MLO_AN_FIXED || 1047 (pl->cfg_link_an_mode == MLO_AN_INBAND && 1048 phy_interface_mode_is_8023z(interface)))) 1049 return -EINVAL; 1050 1051 if (pl->phydev) 1052 return -EBUSY; 1053 1054 return phy_attach_direct(pl->netdev, phy, 0, interface); 1055 } 1056 1057 /** 1058 * phylink_connect_phy() - connect a PHY to the phylink instance 1059 * @pl: a pointer to a &struct phylink returned from phylink_create() 1060 * @phy: a pointer to a &struct phy_device. 1061 * 1062 * Connect @phy to the phylink instance specified by @pl by calling 1063 * phy_attach_direct(). Configure the @phy according to the MAC driver's 1064 * capabilities, start the PHYLIB state machine and enable any interrupts 1065 * that the PHY supports. 1066 * 1067 * This updates the phylink's ethtool supported and advertising link mode 1068 * masks. 1069 * 1070 * Returns 0 on success or a negative errno. 1071 */ 1072 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy) 1073 { 1074 int ret; 1075 1076 /* Use PHY device/driver interface */ 1077 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 1078 pl->link_interface = phy->interface; 1079 pl->link_config.interface = pl->link_interface; 1080 } 1081 1082 ret = phylink_attach_phy(pl, phy, pl->link_interface); 1083 if (ret < 0) 1084 return ret; 1085 1086 ret = phylink_bringup_phy(pl, phy, pl->link_config.interface); 1087 if (ret) 1088 phy_detach(phy); 1089 1090 return ret; 1091 } 1092 EXPORT_SYMBOL_GPL(phylink_connect_phy); 1093 1094 /** 1095 * phylink_of_phy_connect() - connect the PHY specified in the DT mode. 1096 * @pl: a pointer to a &struct phylink returned from phylink_create() 1097 * @dn: a pointer to a &struct device_node. 1098 * @flags: PHY-specific flags to communicate to the PHY device driver 1099 * 1100 * Connect the phy specified in the device node @dn to the phylink instance 1101 * specified by @pl. Actions specified in phylink_connect_phy() will be 1102 * performed. 1103 * 1104 * Returns 0 on success or a negative errno. 1105 */ 1106 int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn, 1107 u32 flags) 1108 { 1109 return phylink_fwnode_phy_connect(pl, of_fwnode_handle(dn), flags); 1110 } 1111 EXPORT_SYMBOL_GPL(phylink_of_phy_connect); 1112 1113 /** 1114 * phylink_fwnode_phy_connect() - connect the PHY specified in the fwnode. 1115 * @pl: a pointer to a &struct phylink returned from phylink_create() 1116 * @fwnode: a pointer to a &struct fwnode_handle. 1117 * @flags: PHY-specific flags to communicate to the PHY device driver 1118 * 1119 * Connect the phy specified @fwnode to the phylink instance specified 1120 * by @pl. 1121 * 1122 * Returns 0 on success or a negative errno. 1123 */ 1124 int phylink_fwnode_phy_connect(struct phylink *pl, 1125 struct fwnode_handle *fwnode, 1126 u32 flags) 1127 { 1128 struct fwnode_handle *phy_fwnode; 1129 struct phy_device *phy_dev; 1130 int ret; 1131 1132 /* Fixed links and 802.3z are handled without needing a PHY */ 1133 if (pl->cfg_link_an_mode == MLO_AN_FIXED || 1134 (pl->cfg_link_an_mode == MLO_AN_INBAND && 1135 phy_interface_mode_is_8023z(pl->link_interface))) 1136 return 0; 1137 1138 phy_fwnode = fwnode_get_phy_node(fwnode); 1139 if (IS_ERR(phy_fwnode)) { 1140 if (pl->cfg_link_an_mode == MLO_AN_PHY) 1141 return -ENODEV; 1142 return 0; 1143 } 1144 1145 phy_dev = fwnode_phy_find_device(phy_fwnode); 1146 /* We're done with the phy_node handle */ 1147 fwnode_handle_put(phy_fwnode); 1148 if (!phy_dev) 1149 return -ENODEV; 1150 1151 ret = phy_attach_direct(pl->netdev, phy_dev, flags, 1152 pl->link_interface); 1153 if (ret) { 1154 phy_device_free(phy_dev); 1155 return ret; 1156 } 1157 1158 ret = phylink_bringup_phy(pl, phy_dev, pl->link_config.interface); 1159 if (ret) 1160 phy_detach(phy_dev); 1161 1162 return ret; 1163 } 1164 EXPORT_SYMBOL_GPL(phylink_fwnode_phy_connect); 1165 1166 /** 1167 * phylink_disconnect_phy() - disconnect any PHY attached to the phylink 1168 * instance. 1169 * @pl: a pointer to a &struct phylink returned from phylink_create() 1170 * 1171 * Disconnect any current PHY from the phylink instance described by @pl. 1172 */ 1173 void phylink_disconnect_phy(struct phylink *pl) 1174 { 1175 struct phy_device *phy; 1176 1177 ASSERT_RTNL(); 1178 1179 phy = pl->phydev; 1180 if (phy) { 1181 mutex_lock(&phy->lock); 1182 mutex_lock(&pl->state_mutex); 1183 pl->phydev = NULL; 1184 mutex_unlock(&pl->state_mutex); 1185 mutex_unlock(&phy->lock); 1186 flush_work(&pl->resolve); 1187 1188 phy_disconnect(phy); 1189 } 1190 } 1191 EXPORT_SYMBOL_GPL(phylink_disconnect_phy); 1192 1193 /** 1194 * phylink_mac_change() - notify phylink of a change in MAC state 1195 * @pl: a pointer to a &struct phylink returned from phylink_create() 1196 * @up: indicates whether the link is currently up. 1197 * 1198 * The MAC driver should call this driver when the state of its link 1199 * changes (eg, link failure, new negotiation results, etc.) 1200 */ 1201 void phylink_mac_change(struct phylink *pl, bool up) 1202 { 1203 if (!up) 1204 pl->mac_link_dropped = true; 1205 phylink_run_resolve(pl); 1206 phylink_dbg(pl, "mac link %s\n", up ? "up" : "down"); 1207 } 1208 EXPORT_SYMBOL_GPL(phylink_mac_change); 1209 1210 static irqreturn_t phylink_link_handler(int irq, void *data) 1211 { 1212 struct phylink *pl = data; 1213 1214 phylink_run_resolve(pl); 1215 1216 return IRQ_HANDLED; 1217 } 1218 1219 /** 1220 * phylink_start() - start a phylink instance 1221 * @pl: a pointer to a &struct phylink returned from phylink_create() 1222 * 1223 * Start the phylink instance specified by @pl, configuring the MAC for the 1224 * desired link mode(s) and negotiation style. This should be called from the 1225 * network device driver's &struct net_device_ops ndo_open() method. 1226 */ 1227 void phylink_start(struct phylink *pl) 1228 { 1229 bool poll = false; 1230 1231 ASSERT_RTNL(); 1232 1233 phylink_info(pl, "configuring for %s/%s link mode\n", 1234 phylink_an_mode_str(pl->cur_link_an_mode), 1235 phy_modes(pl->link_config.interface)); 1236 1237 /* Always set the carrier off */ 1238 if (pl->netdev) 1239 netif_carrier_off(pl->netdev); 1240 1241 /* Apply the link configuration to the MAC when starting. This allows 1242 * a fixed-link to start with the correct parameters, and also 1243 * ensures that we set the appropriate advertisement for Serdes links. 1244 * 1245 * Restart autonegotiation if using 802.3z to ensure that the link 1246 * parameters are properly negotiated. This is necessary for DSA 1247 * switches using 802.3z negotiation to ensure they see our modes. 1248 */ 1249 phylink_mac_initial_config(pl, true); 1250 1251 clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 1252 phylink_run_resolve(pl); 1253 1254 if (pl->cfg_link_an_mode == MLO_AN_FIXED && pl->link_gpio) { 1255 int irq = gpiod_to_irq(pl->link_gpio); 1256 1257 if (irq > 0) { 1258 if (!request_irq(irq, phylink_link_handler, 1259 IRQF_TRIGGER_RISING | 1260 IRQF_TRIGGER_FALLING, 1261 "netdev link", pl)) 1262 pl->link_irq = irq; 1263 else 1264 irq = 0; 1265 } 1266 if (irq <= 0) 1267 poll = true; 1268 } 1269 1270 switch (pl->cfg_link_an_mode) { 1271 case MLO_AN_FIXED: 1272 poll |= pl->config->poll_fixed_state; 1273 break; 1274 case MLO_AN_INBAND: 1275 poll |= pl->config->pcs_poll; 1276 if (pl->pcs) 1277 poll |= pl->pcs->poll; 1278 break; 1279 } 1280 if (poll) 1281 mod_timer(&pl->link_poll, jiffies + HZ); 1282 if (pl->phydev) 1283 phy_start(pl->phydev); 1284 if (pl->sfp_bus) 1285 sfp_upstream_start(pl->sfp_bus); 1286 } 1287 EXPORT_SYMBOL_GPL(phylink_start); 1288 1289 /** 1290 * phylink_stop() - stop a phylink instance 1291 * @pl: a pointer to a &struct phylink returned from phylink_create() 1292 * 1293 * Stop the phylink instance specified by @pl. This should be called from the 1294 * network device driver's &struct net_device_ops ndo_stop() method. The 1295 * network device's carrier state should not be changed prior to calling this 1296 * function. 1297 * 1298 * This will synchronously bring down the link if the link is not already 1299 * down (in other words, it will trigger a mac_link_down() method call.) 1300 */ 1301 void phylink_stop(struct phylink *pl) 1302 { 1303 ASSERT_RTNL(); 1304 1305 if (pl->sfp_bus) 1306 sfp_upstream_stop(pl->sfp_bus); 1307 if (pl->phydev) 1308 phy_stop(pl->phydev); 1309 del_timer_sync(&pl->link_poll); 1310 if (pl->link_irq) { 1311 free_irq(pl->link_irq, pl); 1312 pl->link_irq = 0; 1313 } 1314 1315 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED); 1316 } 1317 EXPORT_SYMBOL_GPL(phylink_stop); 1318 1319 /** 1320 * phylink_suspend() - handle a network device suspend event 1321 * @pl: a pointer to a &struct phylink returned from phylink_create() 1322 * @mac_wol: true if the MAC needs to receive packets for Wake-on-Lan 1323 * 1324 * Handle a network device suspend event. There are several cases: 1325 * - If Wake-on-Lan is not active, we can bring down the link between 1326 * the MAC and PHY by calling phylink_stop(). 1327 * - If Wake-on-Lan is active, and being handled only by the PHY, we 1328 * can also bring down the link between the MAC and PHY. 1329 * - If Wake-on-Lan is active, but being handled by the MAC, the MAC 1330 * still needs to receive packets, so we can not bring the link down. 1331 */ 1332 void phylink_suspend(struct phylink *pl, bool mac_wol) 1333 { 1334 ASSERT_RTNL(); 1335 1336 if (mac_wol && (!pl->netdev || pl->netdev->wol_enabled)) { 1337 /* Wake-on-Lan enabled, MAC handling */ 1338 mutex_lock(&pl->state_mutex); 1339 1340 /* Stop the resolver bringing the link up */ 1341 __set_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state); 1342 1343 /* Disable the carrier, to prevent transmit timeouts, 1344 * but one would hope all packets have been sent. This 1345 * also means phylink_resolve() will do nothing. 1346 */ 1347 if (pl->netdev) 1348 netif_carrier_off(pl->netdev); 1349 else 1350 pl->old_link_state = false; 1351 1352 /* We do not call mac_link_down() here as we want the 1353 * link to remain up to receive the WoL packets. 1354 */ 1355 mutex_unlock(&pl->state_mutex); 1356 } else { 1357 phylink_stop(pl); 1358 } 1359 } 1360 EXPORT_SYMBOL_GPL(phylink_suspend); 1361 1362 /** 1363 * phylink_resume() - handle a network device resume event 1364 * @pl: a pointer to a &struct phylink returned from phylink_create() 1365 * 1366 * Undo the effects of phylink_suspend(), returning the link to an 1367 * operational state. 1368 */ 1369 void phylink_resume(struct phylink *pl) 1370 { 1371 ASSERT_RTNL(); 1372 1373 if (test_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state)) { 1374 /* Wake-on-Lan enabled, MAC handling */ 1375 1376 /* Call mac_link_down() so we keep the overall state balanced. 1377 * Do this under the state_mutex lock for consistency. This 1378 * will cause a "Link Down" message to be printed during 1379 * resume, which is harmless - the true link state will be 1380 * printed when we run a resolve. 1381 */ 1382 mutex_lock(&pl->state_mutex); 1383 phylink_link_down(pl); 1384 mutex_unlock(&pl->state_mutex); 1385 1386 /* Re-apply the link parameters so that all the settings get 1387 * restored to the MAC. 1388 */ 1389 phylink_mac_initial_config(pl, true); 1390 1391 /* Re-enable and re-resolve the link parameters */ 1392 clear_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state); 1393 phylink_run_resolve(pl); 1394 } else { 1395 phylink_start(pl); 1396 } 1397 } 1398 EXPORT_SYMBOL_GPL(phylink_resume); 1399 1400 /** 1401 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY 1402 * @pl: a pointer to a &struct phylink returned from phylink_create() 1403 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters 1404 * 1405 * Read the wake on lan parameters from the PHY attached to the phylink 1406 * instance specified by @pl. If no PHY is currently attached, report no 1407 * support for wake on lan. 1408 */ 1409 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 1410 { 1411 ASSERT_RTNL(); 1412 1413 wol->supported = 0; 1414 wol->wolopts = 0; 1415 1416 if (pl->phydev) 1417 phy_ethtool_get_wol(pl->phydev, wol); 1418 } 1419 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol); 1420 1421 /** 1422 * phylink_ethtool_set_wol() - set wake on lan parameters 1423 * @pl: a pointer to a &struct phylink returned from phylink_create() 1424 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters 1425 * 1426 * Set the wake on lan parameters for the PHY attached to the phylink 1427 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP 1428 * error. 1429 * 1430 * Returns zero on success or negative errno code. 1431 */ 1432 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 1433 { 1434 int ret = -EOPNOTSUPP; 1435 1436 ASSERT_RTNL(); 1437 1438 if (pl->phydev) 1439 ret = phy_ethtool_set_wol(pl->phydev, wol); 1440 1441 return ret; 1442 } 1443 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol); 1444 1445 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b) 1446 { 1447 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask); 1448 1449 linkmode_zero(mask); 1450 phylink_set_port_modes(mask); 1451 1452 linkmode_and(dst, dst, mask); 1453 linkmode_or(dst, dst, b); 1454 } 1455 1456 static void phylink_get_ksettings(const struct phylink_link_state *state, 1457 struct ethtool_link_ksettings *kset) 1458 { 1459 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising); 1460 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising); 1461 kset->base.speed = state->speed; 1462 kset->base.duplex = state->duplex; 1463 kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE : 1464 AUTONEG_DISABLE; 1465 } 1466 1467 /** 1468 * phylink_ethtool_ksettings_get() - get the current link settings 1469 * @pl: a pointer to a &struct phylink returned from phylink_create() 1470 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings 1471 * 1472 * Read the current link settings for the phylink instance specified by @pl. 1473 * This will be the link settings read from the MAC, PHY or fixed link 1474 * settings depending on the current negotiation mode. 1475 */ 1476 int phylink_ethtool_ksettings_get(struct phylink *pl, 1477 struct ethtool_link_ksettings *kset) 1478 { 1479 struct phylink_link_state link_state; 1480 1481 ASSERT_RTNL(); 1482 1483 if (pl->phydev) 1484 phy_ethtool_ksettings_get(pl->phydev, kset); 1485 else 1486 kset->base.port = pl->link_port; 1487 1488 linkmode_copy(kset->link_modes.supported, pl->supported); 1489 1490 switch (pl->cur_link_an_mode) { 1491 case MLO_AN_FIXED: 1492 /* We are using fixed settings. Report these as the 1493 * current link settings - and note that these also 1494 * represent the supported speeds/duplex/pause modes. 1495 */ 1496 phylink_get_fixed_state(pl, &link_state); 1497 phylink_get_ksettings(&link_state, kset); 1498 break; 1499 1500 case MLO_AN_INBAND: 1501 /* If there is a phy attached, then use the reported 1502 * settings from the phy with no modification. 1503 */ 1504 if (pl->phydev) 1505 break; 1506 1507 phylink_mac_pcs_get_state(pl, &link_state); 1508 1509 /* The MAC is reporting the link results from its own PCS 1510 * layer via in-band status. Report these as the current 1511 * link settings. 1512 */ 1513 phylink_get_ksettings(&link_state, kset); 1514 break; 1515 } 1516 1517 return 0; 1518 } 1519 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get); 1520 1521 /** 1522 * phylink_ethtool_ksettings_set() - set the link settings 1523 * @pl: a pointer to a &struct phylink returned from phylink_create() 1524 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes 1525 */ 1526 int phylink_ethtool_ksettings_set(struct phylink *pl, 1527 const struct ethtool_link_ksettings *kset) 1528 { 1529 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 1530 struct phylink_link_state config; 1531 const struct phy_setting *s; 1532 1533 ASSERT_RTNL(); 1534 1535 if (pl->phydev) { 1536 /* We can rely on phylib for this update; we also do not need 1537 * to update the pl->link_config settings: 1538 * - the configuration returned via ksettings_get() will come 1539 * from phylib whenever a PHY is present. 1540 * - link_config.interface will be updated by the PHY calling 1541 * back via phylink_phy_change() and a subsequent resolve. 1542 * - initial link configuration for PHY mode comes from the 1543 * last phy state updated via phylink_phy_change(). 1544 * - other configuration changes (e.g. pause modes) are 1545 * performed directly via phylib. 1546 * - if in in-band mode with a PHY, the link configuration 1547 * is passed on the link from the PHY, and all of 1548 * link_config.{speed,duplex,an_enabled,pause} are not used. 1549 * - the only possible use would be link_config.advertising 1550 * pause modes when in 1000base-X mode with a PHY, but in 1551 * the presence of a PHY, this should not be changed as that 1552 * should be determined from the media side advertisement. 1553 */ 1554 return phy_ethtool_ksettings_set(pl->phydev, kset); 1555 } 1556 1557 config = pl->link_config; 1558 1559 /* Mask out unsupported advertisements */ 1560 linkmode_and(config.advertising, kset->link_modes.advertising, 1561 pl->supported); 1562 1563 /* FIXME: should we reject autoneg if phy/mac does not support it? */ 1564 switch (kset->base.autoneg) { 1565 case AUTONEG_DISABLE: 1566 /* Autonegotiation disabled, select a suitable speed and 1567 * duplex. 1568 */ 1569 s = phy_lookup_setting(kset->base.speed, kset->base.duplex, 1570 pl->supported, false); 1571 if (!s) 1572 return -EINVAL; 1573 1574 /* If we have a fixed link, refuse to change link parameters. 1575 * If the link parameters match, accept them but do nothing. 1576 */ 1577 if (pl->cur_link_an_mode == MLO_AN_FIXED) { 1578 if (s->speed != pl->link_config.speed || 1579 s->duplex != pl->link_config.duplex) 1580 return -EINVAL; 1581 return 0; 1582 } 1583 1584 config.speed = s->speed; 1585 config.duplex = s->duplex; 1586 break; 1587 1588 case AUTONEG_ENABLE: 1589 /* If we have a fixed link, allow autonegotiation (since that 1590 * is our default case) but do not allow the advertisement to 1591 * be changed. If the advertisement matches, simply return. 1592 */ 1593 if (pl->cur_link_an_mode == MLO_AN_FIXED) { 1594 if (!linkmode_equal(config.advertising, 1595 pl->link_config.advertising)) 1596 return -EINVAL; 1597 return 0; 1598 } 1599 1600 config.speed = SPEED_UNKNOWN; 1601 config.duplex = DUPLEX_UNKNOWN; 1602 break; 1603 1604 default: 1605 return -EINVAL; 1606 } 1607 1608 /* We have ruled out the case with a PHY attached, and the 1609 * fixed-link cases. All that is left are in-band links. 1610 */ 1611 config.an_enabled = kset->base.autoneg == AUTONEG_ENABLE; 1612 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising, 1613 config.an_enabled); 1614 1615 /* Validate without changing the current supported mask. */ 1616 linkmode_copy(support, pl->supported); 1617 if (phylink_validate(pl, support, &config)) 1618 return -EINVAL; 1619 1620 /* If autonegotiation is enabled, we must have an advertisement */ 1621 if (config.an_enabled && phylink_is_empty_linkmode(config.advertising)) 1622 return -EINVAL; 1623 1624 /* If this link is with an SFP, ensure that changes to advertised modes 1625 * also cause the associated interface to be selected such that the 1626 * link can be configured correctly. 1627 */ 1628 if (pl->sfp_port && pl->sfp_bus) { 1629 config.interface = sfp_select_interface(pl->sfp_bus, 1630 config.advertising); 1631 if (config.interface == PHY_INTERFACE_MODE_NA) { 1632 phylink_err(pl, 1633 "selection of interface failed, advertisement %*pb\n", 1634 __ETHTOOL_LINK_MODE_MASK_NBITS, 1635 config.advertising); 1636 return -EINVAL; 1637 } 1638 1639 /* Revalidate with the selected interface */ 1640 linkmode_copy(support, pl->supported); 1641 if (phylink_validate(pl, support, &config)) { 1642 phylink_err(pl, "validation of %s/%s with support %*pb failed\n", 1643 phylink_an_mode_str(pl->cur_link_an_mode), 1644 phy_modes(config.interface), 1645 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 1646 return -EINVAL; 1647 } 1648 } 1649 1650 mutex_lock(&pl->state_mutex); 1651 pl->link_config.speed = config.speed; 1652 pl->link_config.duplex = config.duplex; 1653 pl->link_config.an_enabled = config.an_enabled; 1654 1655 if (pl->link_config.interface != config.interface) { 1656 /* The interface changed, e.g. 1000base-X <-> 2500base-X */ 1657 /* We need to force the link down, then change the interface */ 1658 if (pl->old_link_state) { 1659 phylink_link_down(pl); 1660 pl->old_link_state = false; 1661 } 1662 if (!test_bit(PHYLINK_DISABLE_STOPPED, 1663 &pl->phylink_disable_state)) 1664 phylink_major_config(pl, false, &config); 1665 pl->link_config.interface = config.interface; 1666 linkmode_copy(pl->link_config.advertising, config.advertising); 1667 } else if (!linkmode_equal(pl->link_config.advertising, 1668 config.advertising)) { 1669 linkmode_copy(pl->link_config.advertising, config.advertising); 1670 phylink_change_inband_advert(pl); 1671 } 1672 mutex_unlock(&pl->state_mutex); 1673 1674 return 0; 1675 } 1676 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set); 1677 1678 /** 1679 * phylink_ethtool_nway_reset() - restart negotiation 1680 * @pl: a pointer to a &struct phylink returned from phylink_create() 1681 * 1682 * Restart negotiation for the phylink instance specified by @pl. This will 1683 * cause any attached phy to restart negotiation with the link partner, and 1684 * if the MAC is in a BaseX mode, the MAC will also be requested to restart 1685 * negotiation. 1686 * 1687 * Returns zero on success, or negative error code. 1688 */ 1689 int phylink_ethtool_nway_reset(struct phylink *pl) 1690 { 1691 int ret = 0; 1692 1693 ASSERT_RTNL(); 1694 1695 if (pl->phydev) 1696 ret = phy_restart_aneg(pl->phydev); 1697 phylink_mac_pcs_an_restart(pl); 1698 1699 return ret; 1700 } 1701 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset); 1702 1703 /** 1704 * phylink_ethtool_get_pauseparam() - get the current pause parameters 1705 * @pl: a pointer to a &struct phylink returned from phylink_create() 1706 * @pause: a pointer to a &struct ethtool_pauseparam 1707 */ 1708 void phylink_ethtool_get_pauseparam(struct phylink *pl, 1709 struct ethtool_pauseparam *pause) 1710 { 1711 ASSERT_RTNL(); 1712 1713 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN); 1714 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX); 1715 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX); 1716 } 1717 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam); 1718 1719 /** 1720 * phylink_ethtool_set_pauseparam() - set the current pause parameters 1721 * @pl: a pointer to a &struct phylink returned from phylink_create() 1722 * @pause: a pointer to a &struct ethtool_pauseparam 1723 */ 1724 int phylink_ethtool_set_pauseparam(struct phylink *pl, 1725 struct ethtool_pauseparam *pause) 1726 { 1727 struct phylink_link_state *config = &pl->link_config; 1728 bool manual_changed; 1729 int pause_state; 1730 1731 ASSERT_RTNL(); 1732 1733 if (pl->cur_link_an_mode == MLO_AN_FIXED) 1734 return -EOPNOTSUPP; 1735 1736 if (!phylink_test(pl->supported, Pause) && 1737 !phylink_test(pl->supported, Asym_Pause)) 1738 return -EOPNOTSUPP; 1739 1740 if (!phylink_test(pl->supported, Asym_Pause) && 1741 !pause->autoneg && pause->rx_pause != pause->tx_pause) 1742 return -EINVAL; 1743 1744 pause_state = 0; 1745 if (pause->autoneg) 1746 pause_state |= MLO_PAUSE_AN; 1747 if (pause->rx_pause) 1748 pause_state |= MLO_PAUSE_RX; 1749 if (pause->tx_pause) 1750 pause_state |= MLO_PAUSE_TX; 1751 1752 mutex_lock(&pl->state_mutex); 1753 /* 1754 * See the comments for linkmode_set_pause(), wrt the deficiencies 1755 * with the current implementation. A solution to this issue would 1756 * be: 1757 * ethtool Local device 1758 * rx tx Pause AsymDir 1759 * 0 0 0 0 1760 * 1 0 1 1 1761 * 0 1 0 1 1762 * 1 1 1 1 1763 * and then use the ethtool rx/tx enablement status to mask the 1764 * rx/tx pause resolution. 1765 */ 1766 linkmode_set_pause(config->advertising, pause->tx_pause, 1767 pause->rx_pause); 1768 1769 manual_changed = (config->pause ^ pause_state) & MLO_PAUSE_AN || 1770 (!(pause_state & MLO_PAUSE_AN) && 1771 (config->pause ^ pause_state) & MLO_PAUSE_TXRX_MASK); 1772 1773 config->pause = pause_state; 1774 1775 /* Update our in-band advertisement, triggering a renegotiation if 1776 * the advertisement changed. 1777 */ 1778 if (!pl->phydev) 1779 phylink_change_inband_advert(pl); 1780 1781 mutex_unlock(&pl->state_mutex); 1782 1783 /* If we have a PHY, a change of the pause frame advertisement will 1784 * cause phylib to renegotiate (if AN is enabled) which will in turn 1785 * call our phylink_phy_change() and trigger a resolve. Note that 1786 * we can't hold our state mutex while calling phy_set_asym_pause(). 1787 */ 1788 if (pl->phydev) 1789 phy_set_asym_pause(pl->phydev, pause->rx_pause, 1790 pause->tx_pause); 1791 1792 /* If the manual pause settings changed, make sure we trigger a 1793 * resolve to update their state; we can not guarantee that the 1794 * link will cycle. 1795 */ 1796 if (manual_changed) { 1797 pl->mac_link_dropped = true; 1798 phylink_run_resolve(pl); 1799 } 1800 1801 return 0; 1802 } 1803 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam); 1804 1805 /** 1806 * phylink_get_eee_err() - read the energy efficient ethernet error 1807 * counter 1808 * @pl: a pointer to a &struct phylink returned from phylink_create(). 1809 * 1810 * Read the Energy Efficient Ethernet error counter from the PHY associated 1811 * with the phylink instance specified by @pl. 1812 * 1813 * Returns positive error counter value, or negative error code. 1814 */ 1815 int phylink_get_eee_err(struct phylink *pl) 1816 { 1817 int ret = 0; 1818 1819 ASSERT_RTNL(); 1820 1821 if (pl->phydev) 1822 ret = phy_get_eee_err(pl->phydev); 1823 1824 return ret; 1825 } 1826 EXPORT_SYMBOL_GPL(phylink_get_eee_err); 1827 1828 /** 1829 * phylink_init_eee() - init and check the EEE features 1830 * @pl: a pointer to a &struct phylink returned from phylink_create() 1831 * @clk_stop_enable: allow PHY to stop receive clock 1832 * 1833 * Must be called either with RTNL held or within mac_link_up() 1834 */ 1835 int phylink_init_eee(struct phylink *pl, bool clk_stop_enable) 1836 { 1837 int ret = -EOPNOTSUPP; 1838 1839 if (pl->phydev) 1840 ret = phy_init_eee(pl->phydev, clk_stop_enable); 1841 1842 return ret; 1843 } 1844 EXPORT_SYMBOL_GPL(phylink_init_eee); 1845 1846 /** 1847 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters 1848 * @pl: a pointer to a &struct phylink returned from phylink_create() 1849 * @eee: a pointer to a &struct ethtool_eee for the read parameters 1850 */ 1851 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee) 1852 { 1853 int ret = -EOPNOTSUPP; 1854 1855 ASSERT_RTNL(); 1856 1857 if (pl->phydev) 1858 ret = phy_ethtool_get_eee(pl->phydev, eee); 1859 1860 return ret; 1861 } 1862 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee); 1863 1864 /** 1865 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters 1866 * @pl: a pointer to a &struct phylink returned from phylink_create() 1867 * @eee: a pointer to a &struct ethtool_eee for the desired parameters 1868 */ 1869 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee) 1870 { 1871 int ret = -EOPNOTSUPP; 1872 1873 ASSERT_RTNL(); 1874 1875 if (pl->phydev) 1876 ret = phy_ethtool_set_eee(pl->phydev, eee); 1877 1878 return ret; 1879 } 1880 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee); 1881 1882 /* This emulates MII registers for a fixed-mode phy operating as per the 1883 * passed in state. "aneg" defines if we report negotiation is possible. 1884 * 1885 * FIXME: should deal with negotiation state too. 1886 */ 1887 static int phylink_mii_emul_read(unsigned int reg, 1888 struct phylink_link_state *state) 1889 { 1890 struct fixed_phy_status fs; 1891 unsigned long *lpa = state->lp_advertising; 1892 int val; 1893 1894 fs.link = state->link; 1895 fs.speed = state->speed; 1896 fs.duplex = state->duplex; 1897 fs.pause = test_bit(ETHTOOL_LINK_MODE_Pause_BIT, lpa); 1898 fs.asym_pause = test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, lpa); 1899 1900 val = swphy_read_reg(reg, &fs); 1901 if (reg == MII_BMSR) { 1902 if (!state->an_complete) 1903 val &= ~BMSR_ANEGCOMPLETE; 1904 } 1905 return val; 1906 } 1907 1908 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id, 1909 unsigned int reg) 1910 { 1911 struct phy_device *phydev = pl->phydev; 1912 int prtad, devad; 1913 1914 if (mdio_phy_id_is_c45(phy_id)) { 1915 prtad = mdio_phy_id_prtad(phy_id); 1916 devad = mdio_phy_id_devad(phy_id); 1917 devad = mdiobus_c45_addr(devad, reg); 1918 } else if (phydev->is_c45) { 1919 switch (reg) { 1920 case MII_BMCR: 1921 case MII_BMSR: 1922 case MII_PHYSID1: 1923 case MII_PHYSID2: 1924 devad = __ffs(phydev->c45_ids.mmds_present); 1925 break; 1926 case MII_ADVERTISE: 1927 case MII_LPA: 1928 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 1929 return -EINVAL; 1930 devad = MDIO_MMD_AN; 1931 if (reg == MII_ADVERTISE) 1932 reg = MDIO_AN_ADVERTISE; 1933 else 1934 reg = MDIO_AN_LPA; 1935 break; 1936 default: 1937 return -EINVAL; 1938 } 1939 prtad = phy_id; 1940 devad = mdiobus_c45_addr(devad, reg); 1941 } else { 1942 prtad = phy_id; 1943 devad = reg; 1944 } 1945 return mdiobus_read(pl->phydev->mdio.bus, prtad, devad); 1946 } 1947 1948 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id, 1949 unsigned int reg, unsigned int val) 1950 { 1951 struct phy_device *phydev = pl->phydev; 1952 int prtad, devad; 1953 1954 if (mdio_phy_id_is_c45(phy_id)) { 1955 prtad = mdio_phy_id_prtad(phy_id); 1956 devad = mdio_phy_id_devad(phy_id); 1957 devad = mdiobus_c45_addr(devad, reg); 1958 } else if (phydev->is_c45) { 1959 switch (reg) { 1960 case MII_BMCR: 1961 case MII_BMSR: 1962 case MII_PHYSID1: 1963 case MII_PHYSID2: 1964 devad = __ffs(phydev->c45_ids.mmds_present); 1965 break; 1966 case MII_ADVERTISE: 1967 case MII_LPA: 1968 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 1969 return -EINVAL; 1970 devad = MDIO_MMD_AN; 1971 if (reg == MII_ADVERTISE) 1972 reg = MDIO_AN_ADVERTISE; 1973 else 1974 reg = MDIO_AN_LPA; 1975 break; 1976 default: 1977 return -EINVAL; 1978 } 1979 prtad = phy_id; 1980 devad = mdiobus_c45_addr(devad, reg); 1981 } else { 1982 prtad = phy_id; 1983 devad = reg; 1984 } 1985 1986 return mdiobus_write(phydev->mdio.bus, prtad, devad, val); 1987 } 1988 1989 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id, 1990 unsigned int reg) 1991 { 1992 struct phylink_link_state state; 1993 int val = 0xffff; 1994 1995 switch (pl->cur_link_an_mode) { 1996 case MLO_AN_FIXED: 1997 if (phy_id == 0) { 1998 phylink_get_fixed_state(pl, &state); 1999 val = phylink_mii_emul_read(reg, &state); 2000 } 2001 break; 2002 2003 case MLO_AN_PHY: 2004 return -EOPNOTSUPP; 2005 2006 case MLO_AN_INBAND: 2007 if (phy_id == 0) { 2008 phylink_mac_pcs_get_state(pl, &state); 2009 val = phylink_mii_emul_read(reg, &state); 2010 } 2011 break; 2012 } 2013 2014 return val & 0xffff; 2015 } 2016 2017 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id, 2018 unsigned int reg, unsigned int val) 2019 { 2020 switch (pl->cur_link_an_mode) { 2021 case MLO_AN_FIXED: 2022 break; 2023 2024 case MLO_AN_PHY: 2025 return -EOPNOTSUPP; 2026 2027 case MLO_AN_INBAND: 2028 break; 2029 } 2030 2031 return 0; 2032 } 2033 2034 /** 2035 * phylink_mii_ioctl() - generic mii ioctl interface 2036 * @pl: a pointer to a &struct phylink returned from phylink_create() 2037 * @ifr: a pointer to a &struct ifreq for socket ioctls 2038 * @cmd: ioctl cmd to execute 2039 * 2040 * Perform the specified MII ioctl on the PHY attached to the phylink instance 2041 * specified by @pl. If no PHY is attached, emulate the presence of the PHY. 2042 * 2043 * Returns: zero on success or negative error code. 2044 * 2045 * %SIOCGMIIPHY: 2046 * read register from the current PHY. 2047 * %SIOCGMIIREG: 2048 * read register from the specified PHY. 2049 * %SIOCSMIIREG: 2050 * set a register on the specified PHY. 2051 */ 2052 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd) 2053 { 2054 struct mii_ioctl_data *mii = if_mii(ifr); 2055 int ret; 2056 2057 ASSERT_RTNL(); 2058 2059 if (pl->phydev) { 2060 /* PHYs only exist for MLO_AN_PHY and SGMII */ 2061 switch (cmd) { 2062 case SIOCGMIIPHY: 2063 mii->phy_id = pl->phydev->mdio.addr; 2064 fallthrough; 2065 2066 case SIOCGMIIREG: 2067 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num); 2068 if (ret >= 0) { 2069 mii->val_out = ret; 2070 ret = 0; 2071 } 2072 break; 2073 2074 case SIOCSMIIREG: 2075 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num, 2076 mii->val_in); 2077 break; 2078 2079 default: 2080 ret = phy_mii_ioctl(pl->phydev, ifr, cmd); 2081 break; 2082 } 2083 } else { 2084 switch (cmd) { 2085 case SIOCGMIIPHY: 2086 mii->phy_id = 0; 2087 fallthrough; 2088 2089 case SIOCGMIIREG: 2090 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num); 2091 if (ret >= 0) { 2092 mii->val_out = ret; 2093 ret = 0; 2094 } 2095 break; 2096 2097 case SIOCSMIIREG: 2098 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num, 2099 mii->val_in); 2100 break; 2101 2102 default: 2103 ret = -EOPNOTSUPP; 2104 break; 2105 } 2106 } 2107 2108 return ret; 2109 } 2110 EXPORT_SYMBOL_GPL(phylink_mii_ioctl); 2111 2112 /** 2113 * phylink_speed_down() - set the non-SFP PHY to lowest speed supported by both 2114 * link partners 2115 * @pl: a pointer to a &struct phylink returned from phylink_create() 2116 * @sync: perform action synchronously 2117 * 2118 * If we have a PHY that is not part of a SFP module, then set the speed 2119 * as described in the phy_speed_down() function. Please see this function 2120 * for a description of the @sync parameter. 2121 * 2122 * Returns zero if there is no PHY, otherwise as per phy_speed_down(). 2123 */ 2124 int phylink_speed_down(struct phylink *pl, bool sync) 2125 { 2126 int ret = 0; 2127 2128 ASSERT_RTNL(); 2129 2130 if (!pl->sfp_bus && pl->phydev) 2131 ret = phy_speed_down(pl->phydev, sync); 2132 2133 return ret; 2134 } 2135 EXPORT_SYMBOL_GPL(phylink_speed_down); 2136 2137 /** 2138 * phylink_speed_up() - restore the advertised speeds prior to the call to 2139 * phylink_speed_down() 2140 * @pl: a pointer to a &struct phylink returned from phylink_create() 2141 * 2142 * If we have a PHY that is not part of a SFP module, then restore the 2143 * PHY speeds as per phy_speed_up(). 2144 * 2145 * Returns zero if there is no PHY, otherwise as per phy_speed_up(). 2146 */ 2147 int phylink_speed_up(struct phylink *pl) 2148 { 2149 int ret = 0; 2150 2151 ASSERT_RTNL(); 2152 2153 if (!pl->sfp_bus && pl->phydev) 2154 ret = phy_speed_up(pl->phydev); 2155 2156 return ret; 2157 } 2158 EXPORT_SYMBOL_GPL(phylink_speed_up); 2159 2160 static void phylink_sfp_attach(void *upstream, struct sfp_bus *bus) 2161 { 2162 struct phylink *pl = upstream; 2163 2164 pl->netdev->sfp_bus = bus; 2165 } 2166 2167 static void phylink_sfp_detach(void *upstream, struct sfp_bus *bus) 2168 { 2169 struct phylink *pl = upstream; 2170 2171 pl->netdev->sfp_bus = NULL; 2172 } 2173 2174 static int phylink_sfp_config(struct phylink *pl, u8 mode, 2175 const unsigned long *supported, 2176 const unsigned long *advertising) 2177 { 2178 __ETHTOOL_DECLARE_LINK_MODE_MASK(support1); 2179 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 2180 struct phylink_link_state config; 2181 phy_interface_t iface; 2182 bool changed; 2183 int ret; 2184 2185 linkmode_copy(support, supported); 2186 2187 memset(&config, 0, sizeof(config)); 2188 linkmode_copy(config.advertising, advertising); 2189 config.interface = PHY_INTERFACE_MODE_NA; 2190 config.speed = SPEED_UNKNOWN; 2191 config.duplex = DUPLEX_UNKNOWN; 2192 config.pause = MLO_PAUSE_AN; 2193 config.an_enabled = pl->link_config.an_enabled; 2194 2195 /* Ignore errors if we're expecting a PHY to attach later */ 2196 ret = phylink_validate(pl, support, &config); 2197 if (ret) { 2198 phylink_err(pl, "validation with support %*pb failed: %d\n", 2199 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret); 2200 return ret; 2201 } 2202 2203 iface = sfp_select_interface(pl->sfp_bus, config.advertising); 2204 if (iface == PHY_INTERFACE_MODE_NA) { 2205 phylink_err(pl, 2206 "selection of interface failed, advertisement %*pb\n", 2207 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising); 2208 return -EINVAL; 2209 } 2210 2211 config.interface = iface; 2212 linkmode_copy(support1, support); 2213 ret = phylink_validate(pl, support1, &config); 2214 if (ret) { 2215 phylink_err(pl, "validation of %s/%s with support %*pb failed: %d\n", 2216 phylink_an_mode_str(mode), 2217 phy_modes(config.interface), 2218 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret); 2219 return ret; 2220 } 2221 2222 phylink_dbg(pl, "requesting link mode %s/%s with support %*pb\n", 2223 phylink_an_mode_str(mode), phy_modes(config.interface), 2224 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 2225 2226 if (phy_interface_mode_is_8023z(iface) && pl->phydev) 2227 return -EINVAL; 2228 2229 changed = !linkmode_equal(pl->supported, support) || 2230 !linkmode_equal(pl->link_config.advertising, 2231 config.advertising); 2232 if (changed) { 2233 linkmode_copy(pl->supported, support); 2234 linkmode_copy(pl->link_config.advertising, config.advertising); 2235 } 2236 2237 if (pl->cur_link_an_mode != mode || 2238 pl->link_config.interface != config.interface) { 2239 pl->link_config.interface = config.interface; 2240 pl->cur_link_an_mode = mode; 2241 2242 changed = true; 2243 2244 phylink_info(pl, "switched to %s/%s link mode\n", 2245 phylink_an_mode_str(mode), 2246 phy_modes(config.interface)); 2247 } 2248 2249 pl->link_port = pl->sfp_port; 2250 2251 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED, 2252 &pl->phylink_disable_state)) 2253 phylink_mac_initial_config(pl, false); 2254 2255 return ret; 2256 } 2257 2258 static int phylink_sfp_module_insert(void *upstream, 2259 const struct sfp_eeprom_id *id) 2260 { 2261 struct phylink *pl = upstream; 2262 unsigned long *support = pl->sfp_support; 2263 2264 ASSERT_RTNL(); 2265 2266 linkmode_zero(support); 2267 sfp_parse_support(pl->sfp_bus, id, support); 2268 pl->sfp_port = sfp_parse_port(pl->sfp_bus, id, support); 2269 2270 /* If this module may have a PHY connecting later, defer until later */ 2271 pl->sfp_may_have_phy = sfp_may_have_phy(pl->sfp_bus, id); 2272 if (pl->sfp_may_have_phy) 2273 return 0; 2274 2275 return phylink_sfp_config(pl, MLO_AN_INBAND, support, support); 2276 } 2277 2278 static int phylink_sfp_module_start(void *upstream) 2279 { 2280 struct phylink *pl = upstream; 2281 2282 /* If this SFP module has a PHY, start the PHY now. */ 2283 if (pl->phydev) { 2284 phy_start(pl->phydev); 2285 return 0; 2286 } 2287 2288 /* If the module may have a PHY but we didn't detect one we 2289 * need to configure the MAC here. 2290 */ 2291 if (!pl->sfp_may_have_phy) 2292 return 0; 2293 2294 return phylink_sfp_config(pl, MLO_AN_INBAND, 2295 pl->sfp_support, pl->sfp_support); 2296 } 2297 2298 static void phylink_sfp_module_stop(void *upstream) 2299 { 2300 struct phylink *pl = upstream; 2301 2302 /* If this SFP module has a PHY, stop it. */ 2303 if (pl->phydev) 2304 phy_stop(pl->phydev); 2305 } 2306 2307 static void phylink_sfp_link_down(void *upstream) 2308 { 2309 struct phylink *pl = upstream; 2310 2311 ASSERT_RTNL(); 2312 2313 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_LINK); 2314 } 2315 2316 static void phylink_sfp_link_up(void *upstream) 2317 { 2318 struct phylink *pl = upstream; 2319 2320 ASSERT_RTNL(); 2321 2322 clear_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state); 2323 phylink_run_resolve(pl); 2324 } 2325 2326 /* The Broadcom BCM84881 in the Methode DM7052 is unable to provide a SGMII 2327 * or 802.3z control word, so inband will not work. 2328 */ 2329 static bool phylink_phy_no_inband(struct phy_device *phy) 2330 { 2331 return phy->is_c45 && 2332 (phy->c45_ids.device_ids[1] & 0xfffffff0) == 0xae025150; 2333 } 2334 2335 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy) 2336 { 2337 struct phylink *pl = upstream; 2338 phy_interface_t interface; 2339 u8 mode; 2340 int ret; 2341 2342 /* 2343 * This is the new way of dealing with flow control for PHYs, 2344 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 2345 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 2346 * using our validate call to the MAC, we rely upon the MAC 2347 * clearing the bits from both supported and advertising fields. 2348 */ 2349 phy_support_asym_pause(phy); 2350 2351 if (phylink_phy_no_inband(phy)) 2352 mode = MLO_AN_PHY; 2353 else 2354 mode = MLO_AN_INBAND; 2355 2356 /* Do the initial configuration */ 2357 ret = phylink_sfp_config(pl, mode, phy->supported, phy->advertising); 2358 if (ret < 0) 2359 return ret; 2360 2361 interface = pl->link_config.interface; 2362 ret = phylink_attach_phy(pl, phy, interface); 2363 if (ret < 0) 2364 return ret; 2365 2366 ret = phylink_bringup_phy(pl, phy, interface); 2367 if (ret) 2368 phy_detach(phy); 2369 2370 return ret; 2371 } 2372 2373 static void phylink_sfp_disconnect_phy(void *upstream) 2374 { 2375 phylink_disconnect_phy(upstream); 2376 } 2377 2378 static const struct sfp_upstream_ops sfp_phylink_ops = { 2379 .attach = phylink_sfp_attach, 2380 .detach = phylink_sfp_detach, 2381 .module_insert = phylink_sfp_module_insert, 2382 .module_start = phylink_sfp_module_start, 2383 .module_stop = phylink_sfp_module_stop, 2384 .link_up = phylink_sfp_link_up, 2385 .link_down = phylink_sfp_link_down, 2386 .connect_phy = phylink_sfp_connect_phy, 2387 .disconnect_phy = phylink_sfp_disconnect_phy, 2388 }; 2389 2390 /* Helpers for MAC drivers */ 2391 2392 /** 2393 * phylink_helper_basex_speed() - 1000BaseX/2500BaseX helper 2394 * @state: a pointer to a &struct phylink_link_state 2395 * 2396 * Inspect the interface mode, advertising mask or forced speed and 2397 * decide whether to run at 2.5Gbit or 1Gbit appropriately, switching 2398 * the interface mode to suit. @state->interface is appropriately 2399 * updated, and the advertising mask has the "other" baseX_Full flag 2400 * cleared. 2401 */ 2402 void phylink_helper_basex_speed(struct phylink_link_state *state) 2403 { 2404 if (phy_interface_mode_is_8023z(state->interface)) { 2405 bool want_2500 = state->an_enabled ? 2406 phylink_test(state->advertising, 2500baseX_Full) : 2407 state->speed == SPEED_2500; 2408 2409 if (want_2500) { 2410 phylink_clear(state->advertising, 1000baseX_Full); 2411 state->interface = PHY_INTERFACE_MODE_2500BASEX; 2412 } else { 2413 phylink_clear(state->advertising, 2500baseX_Full); 2414 state->interface = PHY_INTERFACE_MODE_1000BASEX; 2415 } 2416 } 2417 } 2418 EXPORT_SYMBOL_GPL(phylink_helper_basex_speed); 2419 2420 static void phylink_decode_c37_word(struct phylink_link_state *state, 2421 uint16_t config_reg, int speed) 2422 { 2423 bool tx_pause, rx_pause; 2424 int fd_bit; 2425 2426 if (speed == SPEED_2500) 2427 fd_bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT; 2428 else 2429 fd_bit = ETHTOOL_LINK_MODE_1000baseX_Full_BIT; 2430 2431 mii_lpa_mod_linkmode_x(state->lp_advertising, config_reg, fd_bit); 2432 2433 if (linkmode_test_bit(fd_bit, state->advertising) && 2434 linkmode_test_bit(fd_bit, state->lp_advertising)) { 2435 state->speed = speed; 2436 state->duplex = DUPLEX_FULL; 2437 } else { 2438 /* negotiation failure */ 2439 state->link = false; 2440 } 2441 2442 linkmode_resolve_pause(state->advertising, state->lp_advertising, 2443 &tx_pause, &rx_pause); 2444 2445 if (tx_pause) 2446 state->pause |= MLO_PAUSE_TX; 2447 if (rx_pause) 2448 state->pause |= MLO_PAUSE_RX; 2449 } 2450 2451 static void phylink_decode_sgmii_word(struct phylink_link_state *state, 2452 uint16_t config_reg) 2453 { 2454 if (!(config_reg & LPA_SGMII_LINK)) { 2455 state->link = false; 2456 return; 2457 } 2458 2459 switch (config_reg & LPA_SGMII_SPD_MASK) { 2460 case LPA_SGMII_10: 2461 state->speed = SPEED_10; 2462 break; 2463 case LPA_SGMII_100: 2464 state->speed = SPEED_100; 2465 break; 2466 case LPA_SGMII_1000: 2467 state->speed = SPEED_1000; 2468 break; 2469 default: 2470 state->link = false; 2471 return; 2472 } 2473 if (config_reg & LPA_SGMII_FULL_DUPLEX) 2474 state->duplex = DUPLEX_FULL; 2475 else 2476 state->duplex = DUPLEX_HALF; 2477 } 2478 2479 /** 2480 * phylink_decode_usxgmii_word() - decode the USXGMII word from a MAC PCS 2481 * @state: a pointer to a struct phylink_link_state. 2482 * @lpa: a 16 bit value which stores the USXGMII auto-negotiation word 2483 * 2484 * Helper for MAC PCS supporting the USXGMII protocol and the auto-negotiation 2485 * code word. Decode the USXGMII code word and populate the corresponding fields 2486 * (speed, duplex) into the phylink_link_state structure. 2487 */ 2488 void phylink_decode_usxgmii_word(struct phylink_link_state *state, 2489 uint16_t lpa) 2490 { 2491 switch (lpa & MDIO_USXGMII_SPD_MASK) { 2492 case MDIO_USXGMII_10: 2493 state->speed = SPEED_10; 2494 break; 2495 case MDIO_USXGMII_100: 2496 state->speed = SPEED_100; 2497 break; 2498 case MDIO_USXGMII_1000: 2499 state->speed = SPEED_1000; 2500 break; 2501 case MDIO_USXGMII_2500: 2502 state->speed = SPEED_2500; 2503 break; 2504 case MDIO_USXGMII_5000: 2505 state->speed = SPEED_5000; 2506 break; 2507 case MDIO_USXGMII_10G: 2508 state->speed = SPEED_10000; 2509 break; 2510 default: 2511 state->link = false; 2512 return; 2513 } 2514 2515 if (lpa & MDIO_USXGMII_FULL_DUPLEX) 2516 state->duplex = DUPLEX_FULL; 2517 else 2518 state->duplex = DUPLEX_HALF; 2519 } 2520 EXPORT_SYMBOL_GPL(phylink_decode_usxgmii_word); 2521 2522 /** 2523 * phylink_mii_c22_pcs_get_state() - read the MAC PCS state 2524 * @pcs: a pointer to a &struct mdio_device. 2525 * @state: a pointer to a &struct phylink_link_state. 2526 * 2527 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 2528 * clause 37 negotiation and/or SGMII control. 2529 * 2530 * Read the MAC PCS state from the MII device configured in @config and 2531 * parse the Clause 37 or Cisco SGMII link partner negotiation word into 2532 * the phylink @state structure. This is suitable to be directly plugged 2533 * into the mac_pcs_get_state() member of the struct phylink_mac_ops 2534 * structure. 2535 */ 2536 void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs, 2537 struct phylink_link_state *state) 2538 { 2539 struct mii_bus *bus = pcs->bus; 2540 int addr = pcs->addr; 2541 int bmsr, lpa; 2542 2543 bmsr = mdiobus_read(bus, addr, MII_BMSR); 2544 lpa = mdiobus_read(bus, addr, MII_LPA); 2545 if (bmsr < 0 || lpa < 0) { 2546 state->link = false; 2547 return; 2548 } 2549 2550 state->link = !!(bmsr & BMSR_LSTATUS); 2551 state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE); 2552 if (!state->link) 2553 return; 2554 2555 switch (state->interface) { 2556 case PHY_INTERFACE_MODE_1000BASEX: 2557 phylink_decode_c37_word(state, lpa, SPEED_1000); 2558 break; 2559 2560 case PHY_INTERFACE_MODE_2500BASEX: 2561 phylink_decode_c37_word(state, lpa, SPEED_2500); 2562 break; 2563 2564 case PHY_INTERFACE_MODE_SGMII: 2565 case PHY_INTERFACE_MODE_QSGMII: 2566 phylink_decode_sgmii_word(state, lpa); 2567 break; 2568 2569 default: 2570 state->link = false; 2571 break; 2572 } 2573 } 2574 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_get_state); 2575 2576 /** 2577 * phylink_mii_c22_pcs_set_advertisement() - configure the clause 37 PCS 2578 * advertisement 2579 * @pcs: a pointer to a &struct mdio_device. 2580 * @interface: the PHY interface mode being configured 2581 * @advertising: the ethtool advertisement mask 2582 * 2583 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 2584 * clause 37 negotiation and/or SGMII control. 2585 * 2586 * Configure the clause 37 PCS advertisement as specified by @state. This 2587 * does not trigger a renegotiation; phylink will do that via the 2588 * mac_an_restart() method of the struct phylink_mac_ops structure. 2589 * 2590 * Returns negative error code on failure to configure the advertisement, 2591 * zero if no change has been made, or one if the advertisement has changed. 2592 */ 2593 int phylink_mii_c22_pcs_set_advertisement(struct mdio_device *pcs, 2594 phy_interface_t interface, 2595 const unsigned long *advertising) 2596 { 2597 struct mii_bus *bus = pcs->bus; 2598 int addr = pcs->addr; 2599 u16 adv; 2600 2601 switch (interface) { 2602 case PHY_INTERFACE_MODE_1000BASEX: 2603 case PHY_INTERFACE_MODE_2500BASEX: 2604 adv = ADVERTISE_1000XFULL; 2605 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2606 advertising)) 2607 adv |= ADVERTISE_1000XPAUSE; 2608 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2609 advertising)) 2610 adv |= ADVERTISE_1000XPSE_ASYM; 2611 2612 return mdiobus_modify_changed(bus, addr, MII_ADVERTISE, 2613 0xffff, adv); 2614 2615 case PHY_INTERFACE_MODE_SGMII: 2616 return mdiobus_modify_changed(bus, addr, MII_ADVERTISE, 2617 0xffff, 0x0001); 2618 2619 default: 2620 /* Nothing to do for other modes */ 2621 return 0; 2622 } 2623 } 2624 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_set_advertisement); 2625 2626 /** 2627 * phylink_mii_c22_pcs_config() - configure clause 22 PCS 2628 * @pcs: a pointer to a &struct mdio_device. 2629 * @mode: link autonegotiation mode 2630 * @interface: the PHY interface mode being configured 2631 * @advertising: the ethtool advertisement mask 2632 * 2633 * Configure a Clause 22 PCS PHY with the appropriate negotiation 2634 * parameters for the @mode, @interface and @advertising parameters. 2635 * Returns negative error number on failure, zero if the advertisement 2636 * has not changed, or positive if there is a change. 2637 */ 2638 int phylink_mii_c22_pcs_config(struct mdio_device *pcs, unsigned int mode, 2639 phy_interface_t interface, 2640 const unsigned long *advertising) 2641 { 2642 bool changed; 2643 u16 bmcr; 2644 int ret; 2645 2646 ret = phylink_mii_c22_pcs_set_advertisement(pcs, interface, 2647 advertising); 2648 if (ret < 0) 2649 return ret; 2650 2651 changed = ret > 0; 2652 2653 /* Ensure ISOLATE bit is disabled */ 2654 bmcr = mode == MLO_AN_INBAND ? BMCR_ANENABLE : 0; 2655 ret = mdiobus_modify(pcs->bus, pcs->addr, MII_BMCR, 2656 BMCR_ANENABLE | BMCR_ISOLATE, bmcr); 2657 if (ret < 0) 2658 return ret; 2659 2660 return changed ? 1 : 0; 2661 } 2662 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config); 2663 2664 /** 2665 * phylink_mii_c22_pcs_an_restart() - restart 802.3z autonegotiation 2666 * @pcs: a pointer to a &struct mdio_device. 2667 * 2668 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 2669 * clause 37 negotiation. 2670 * 2671 * Restart the clause 37 negotiation with the link partner. This is 2672 * suitable to be directly plugged into the mac_pcs_get_state() member 2673 * of the struct phylink_mac_ops structure. 2674 */ 2675 void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs) 2676 { 2677 struct mii_bus *bus = pcs->bus; 2678 int val, addr = pcs->addr; 2679 2680 val = mdiobus_read(bus, addr, MII_BMCR); 2681 if (val >= 0) { 2682 val |= BMCR_ANRESTART; 2683 2684 mdiobus_write(bus, addr, MII_BMCR, val); 2685 } 2686 } 2687 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_an_restart); 2688 2689 void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs, 2690 struct phylink_link_state *state) 2691 { 2692 struct mii_bus *bus = pcs->bus; 2693 int addr = pcs->addr; 2694 int stat; 2695 2696 stat = mdiobus_c45_read(bus, addr, MDIO_MMD_PCS, MDIO_STAT1); 2697 if (stat < 0) { 2698 state->link = false; 2699 return; 2700 } 2701 2702 state->link = !!(stat & MDIO_STAT1_LSTATUS); 2703 if (!state->link) 2704 return; 2705 2706 switch (state->interface) { 2707 case PHY_INTERFACE_MODE_10GBASER: 2708 state->speed = SPEED_10000; 2709 state->duplex = DUPLEX_FULL; 2710 break; 2711 2712 default: 2713 break; 2714 } 2715 } 2716 EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state); 2717 2718 MODULE_LICENSE("GPL v2"); 2719