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 "phy-caps.h" 24 #include "sfp.h" 25 #include "swphy.h" 26 27 enum { 28 PHYLINK_DISABLE_STOPPED, 29 PHYLINK_DISABLE_LINK, 30 PHYLINK_DISABLE_MAC_WOL, 31 PHYLINK_DISABLE_REPLAY, 32 33 PCS_STATE_DOWN = 0, 34 PCS_STATE_STARTING, 35 PCS_STATE_STARTED, 36 }; 37 38 /** 39 * struct phylink - internal data type for phylink 40 */ 41 struct phylink { 42 /* private: */ 43 struct net_device *netdev; 44 const struct phylink_mac_ops *mac_ops; 45 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 req_link_an_mode; /* Requested MLO_AN_xxx mode */ 55 u8 act_link_an_mode; /* Active MLO_AN_xxx mode */ 56 u8 link_port; /* The current non-phy ethtool port */ 57 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 58 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported_lpi); 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 70 struct mutex state_mutex; 71 /* Serialize updates to pl->phydev with phylink_resolve() */ 72 struct mutex phydev_mutex; 73 struct phylink_link_state phy_state; 74 unsigned int phy_ib_mode; 75 struct work_struct resolve; 76 unsigned int pcs_neg_mode; 77 unsigned int pcs_state; 78 79 bool link_failed; 80 bool suspend_link_up; 81 bool force_major_config; 82 bool major_config_failed; 83 bool mac_supports_eee_ops; 84 bool mac_supports_eee; 85 bool phy_enable_tx_lpi; 86 bool mac_enable_tx_lpi; 87 bool mac_tx_clk_stop; 88 u32 mac_tx_lpi_timer; 89 u8 mac_rx_clk_stop_blocked; 90 91 struct sfp_bus *sfp_bus; 92 bool sfp_may_have_phy; 93 DECLARE_PHY_INTERFACE_MASK(sfp_interfaces); 94 __ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support); 95 u8 sfp_port; 96 97 struct eee_config eee_cfg; 98 99 u32 wolopts_mac; 100 u8 wol_sopass[SOPASS_MAX]; 101 }; 102 103 #define phylink_printk(level, pl, fmt, ...) \ 104 do { \ 105 if ((pl)->config->type == PHYLINK_NETDEV) \ 106 netdev_printk(level, (pl)->netdev, fmt, ##__VA_ARGS__); \ 107 else if ((pl)->config->type == PHYLINK_DEV) \ 108 dev_printk(level, (pl)->dev, fmt, ##__VA_ARGS__); \ 109 } while (0) 110 111 #define phylink_err(pl, fmt, ...) \ 112 phylink_printk(KERN_ERR, pl, fmt, ##__VA_ARGS__) 113 #define phylink_warn(pl, fmt, ...) \ 114 phylink_printk(KERN_WARNING, pl, fmt, ##__VA_ARGS__) 115 #define phylink_info(pl, fmt, ...) \ 116 phylink_printk(KERN_INFO, pl, fmt, ##__VA_ARGS__) 117 #if defined(CONFIG_DYNAMIC_DEBUG) 118 #define phylink_dbg(pl, fmt, ...) \ 119 do { \ 120 if ((pl)->config->type == PHYLINK_NETDEV) \ 121 netdev_dbg((pl)->netdev, fmt, ##__VA_ARGS__); \ 122 else if ((pl)->config->type == PHYLINK_DEV) \ 123 dev_dbg((pl)->dev, fmt, ##__VA_ARGS__); \ 124 } while (0) 125 #elif defined(DEBUG) 126 #define phylink_dbg(pl, fmt, ...) \ 127 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__) 128 #else 129 #define phylink_dbg(pl, fmt, ...) \ 130 ({ \ 131 if (0) \ 132 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__); \ 133 }) 134 #endif 135 136 static const phy_interface_t phylink_sfp_interface_preference[] = { 137 PHY_INTERFACE_MODE_100GBASEP, 138 PHY_INTERFACE_MODE_50GBASER, 139 PHY_INTERFACE_MODE_LAUI, 140 PHY_INTERFACE_MODE_25GBASER, 141 PHY_INTERFACE_MODE_USXGMII, 142 PHY_INTERFACE_MODE_10GBASER, 143 PHY_INTERFACE_MODE_5GBASER, 144 PHY_INTERFACE_MODE_2500BASEX, 145 PHY_INTERFACE_MODE_SGMII, 146 PHY_INTERFACE_MODE_1000BASEX, 147 PHY_INTERFACE_MODE_100BASEX, 148 }; 149 150 static DECLARE_PHY_INTERFACE_MASK(phylink_sfp_interfaces); 151 152 /** 153 * phylink_set_port_modes() - set the port type modes in the ethtool mask 154 * @mask: ethtool link mode mask 155 * 156 * Sets all the port type modes in the ethtool mask. MAC drivers should 157 * use this in their 'validate' callback. 158 */ 159 void phylink_set_port_modes(unsigned long *mask) 160 { 161 phylink_set(mask, TP); 162 phylink_set(mask, AUI); 163 phylink_set(mask, MII); 164 phylink_set(mask, FIBRE); 165 phylink_set(mask, BNC); 166 phylink_set(mask, Backplane); 167 } 168 EXPORT_SYMBOL_GPL(phylink_set_port_modes); 169 170 static int phylink_is_empty_linkmode(const unsigned long *linkmode) 171 { 172 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, }; 173 174 phylink_set_port_modes(tmp); 175 phylink_set(tmp, Autoneg); 176 phylink_set(tmp, Pause); 177 phylink_set(tmp, Asym_Pause); 178 179 return linkmode_subset(linkmode, tmp); 180 } 181 182 static const char *phylink_an_mode_str(unsigned int mode) 183 { 184 static const char *modestr[] = { 185 [MLO_AN_PHY] = "phy", 186 [MLO_AN_FIXED] = "fixed", 187 [MLO_AN_INBAND] = "inband", 188 }; 189 190 return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown"; 191 } 192 193 static const char *phylink_pcs_mode_str(unsigned int mode) 194 { 195 if (!mode) 196 return "none"; 197 198 if (mode & PHYLINK_PCS_NEG_OUTBAND) 199 return "outband"; 200 201 if (mode & PHYLINK_PCS_NEG_INBAND) { 202 if (mode & PHYLINK_PCS_NEG_ENABLED) 203 return "inband,an-enabled"; 204 else 205 return "inband,an-disabled"; 206 } 207 208 return "unknown"; 209 } 210 211 static unsigned int phylink_interface_signal_rate(phy_interface_t interface) 212 { 213 switch (interface) { 214 case PHY_INTERFACE_MODE_SGMII: 215 case PHY_INTERFACE_MODE_1000BASEX: /* 1.25Mbd */ 216 return 1250; 217 case PHY_INTERFACE_MODE_2500BASEX: /* 3.125Mbd */ 218 return 3125; 219 case PHY_INTERFACE_MODE_5GBASER: /* 5.15625Mbd */ 220 return 5156; 221 case PHY_INTERFACE_MODE_10GBASER: /* 10.3125Mbd */ 222 return 10313; 223 default: 224 return 0; 225 } 226 } 227 228 /** 229 * phylink_interface_max_speed() - get the maximum speed of a phy interface 230 * @interface: phy interface mode defined by &typedef phy_interface_t 231 * 232 * Determine the maximum speed of a phy interface. This is intended to help 233 * determine the correct speed to pass to the MAC when the phy is performing 234 * rate matching. 235 * 236 * Return: The maximum speed of @interface 237 */ 238 static int phylink_interface_max_speed(phy_interface_t interface) 239 { 240 switch (interface) { 241 case PHY_INTERFACE_MODE_100BASEX: 242 case PHY_INTERFACE_MODE_REVRMII: 243 case PHY_INTERFACE_MODE_RMII: 244 case PHY_INTERFACE_MODE_SMII: 245 case PHY_INTERFACE_MODE_REVMII: 246 case PHY_INTERFACE_MODE_MII: 247 case PHY_INTERFACE_MODE_MIILITE: 248 return SPEED_100; 249 250 case PHY_INTERFACE_MODE_TBI: 251 case PHY_INTERFACE_MODE_MOCA: 252 case PHY_INTERFACE_MODE_RTBI: 253 case PHY_INTERFACE_MODE_1000BASEX: 254 case PHY_INTERFACE_MODE_1000BASEKX: 255 case PHY_INTERFACE_MODE_TRGMII: 256 case PHY_INTERFACE_MODE_RGMII_TXID: 257 case PHY_INTERFACE_MODE_RGMII_RXID: 258 case PHY_INTERFACE_MODE_RGMII_ID: 259 case PHY_INTERFACE_MODE_RGMII: 260 case PHY_INTERFACE_MODE_PSGMII: 261 case PHY_INTERFACE_MODE_QSGMII: 262 case PHY_INTERFACE_MODE_QUSGMII: 263 case PHY_INTERFACE_MODE_SGMII: 264 case PHY_INTERFACE_MODE_GMII: 265 return SPEED_1000; 266 267 case PHY_INTERFACE_MODE_2500BASEX: 268 case PHY_INTERFACE_MODE_10G_QXGMII: 269 return SPEED_2500; 270 271 case PHY_INTERFACE_MODE_5GBASER: 272 return SPEED_5000; 273 274 case PHY_INTERFACE_MODE_XGMII: 275 case PHY_INTERFACE_MODE_RXAUI: 276 case PHY_INTERFACE_MODE_XAUI: 277 case PHY_INTERFACE_MODE_10GBASER: 278 case PHY_INTERFACE_MODE_10GKR: 279 case PHY_INTERFACE_MODE_USXGMII: 280 return SPEED_10000; 281 282 case PHY_INTERFACE_MODE_25GBASER: 283 return SPEED_25000; 284 285 case PHY_INTERFACE_MODE_XLGMII: 286 return SPEED_40000; 287 288 case PHY_INTERFACE_MODE_50GBASER: 289 case PHY_INTERFACE_MODE_LAUI: 290 return SPEED_50000; 291 292 case PHY_INTERFACE_MODE_100GBASEP: 293 return SPEED_100000; 294 295 case PHY_INTERFACE_MODE_INTERNAL: 296 case PHY_INTERFACE_MODE_NA: 297 case PHY_INTERFACE_MODE_MAX: 298 /* No idea! Garbage in, unknown out */ 299 return SPEED_UNKNOWN; 300 } 301 302 /* If we get here, someone forgot to add an interface mode above */ 303 WARN_ON_ONCE(1); 304 return SPEED_UNKNOWN; 305 } 306 307 static struct { 308 unsigned long mask; 309 int speed; 310 unsigned int duplex; 311 unsigned int caps_bit; 312 } phylink_caps_params[] = { 313 { MAC_400000FD, SPEED_400000, DUPLEX_FULL, BIT(LINK_CAPA_400000FD) }, 314 { MAC_200000FD, SPEED_200000, DUPLEX_FULL, BIT(LINK_CAPA_200000FD) }, 315 { MAC_100000FD, SPEED_100000, DUPLEX_FULL, BIT(LINK_CAPA_100000FD) }, 316 { MAC_80000FD, SPEED_80000, DUPLEX_FULL, BIT(LINK_CAPA_80000FD) }, 317 { MAC_56000FD, SPEED_56000, DUPLEX_FULL, BIT(LINK_CAPA_56000FD) }, 318 { MAC_50000FD, SPEED_50000, DUPLEX_FULL, BIT(LINK_CAPA_50000FD) }, 319 { MAC_40000FD, SPEED_40000, DUPLEX_FULL, BIT(LINK_CAPA_40000FD) }, 320 { MAC_25000FD, SPEED_25000, DUPLEX_FULL, BIT(LINK_CAPA_25000FD) }, 321 { MAC_20000FD, SPEED_20000, DUPLEX_FULL, BIT(LINK_CAPA_20000FD) }, 322 { MAC_10000FD, SPEED_10000, DUPLEX_FULL, BIT(LINK_CAPA_10000FD) }, 323 { MAC_5000FD, SPEED_5000, DUPLEX_FULL, BIT(LINK_CAPA_5000FD) }, 324 { MAC_2500FD, SPEED_2500, DUPLEX_FULL, BIT(LINK_CAPA_2500FD) }, 325 { MAC_1000FD, SPEED_1000, DUPLEX_FULL, BIT(LINK_CAPA_1000FD) }, 326 { MAC_1000HD, SPEED_1000, DUPLEX_HALF, BIT(LINK_CAPA_1000HD) }, 327 { MAC_100FD, SPEED_100, DUPLEX_FULL, BIT(LINK_CAPA_100FD) }, 328 { MAC_100HD, SPEED_100, DUPLEX_HALF, BIT(LINK_CAPA_100HD) }, 329 { MAC_10FD, SPEED_10, DUPLEX_FULL, BIT(LINK_CAPA_10FD) }, 330 { MAC_10HD, SPEED_10, DUPLEX_HALF, BIT(LINK_CAPA_10HD) }, 331 }; 332 333 /** 334 * phylink_caps_to_link_caps() - Convert a set of MAC capabilities LINK caps 335 * @caps: A set of MAC capabilities 336 * 337 * Returns: The corresponding set of LINK_CAPA as defined in phy-caps.h 338 */ 339 static unsigned long phylink_caps_to_link_caps(unsigned long caps) 340 { 341 unsigned long link_caps = 0; 342 int i; 343 344 for (i = 0; i < ARRAY_SIZE(phylink_caps_params); i++) 345 if (caps & phylink_caps_params[i].mask) 346 link_caps |= phylink_caps_params[i].caps_bit; 347 348 return link_caps; 349 } 350 351 static unsigned long phylink_link_caps_to_mac_caps(unsigned long link_caps) 352 { 353 unsigned long caps = 0; 354 int i; 355 356 for (i = 0; i < ARRAY_SIZE(phylink_caps_params); i++) 357 if (link_caps & phylink_caps_params[i].caps_bit) 358 caps |= phylink_caps_params[i].mask; 359 360 return caps; 361 } 362 363 /** 364 * phylink_caps_to_linkmodes() - Convert capabilities to ethtool link modes 365 * @linkmodes: ethtool linkmode mask (must be already initialised) 366 * @caps: bitmask of MAC capabilities 367 * 368 * Set all possible pause, speed and duplex linkmodes in @linkmodes that are 369 * supported by the @caps. @linkmodes must have been initialised previously. 370 */ 371 static void phylink_caps_to_linkmodes(unsigned long *linkmodes, 372 unsigned long caps) 373 { 374 unsigned long link_caps = phylink_caps_to_link_caps(caps); 375 376 if (caps & MAC_SYM_PAUSE) 377 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, linkmodes); 378 379 if (caps & MAC_ASYM_PAUSE) 380 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, linkmodes); 381 382 phy_caps_linkmodes(link_caps, linkmodes); 383 } 384 385 /** 386 * phylink_limit_mac_speed - limit the phylink_config to a maximum speed 387 * @config: pointer to a &struct phylink_config 388 * @max_speed: maximum speed 389 * 390 * Mask off MAC capabilities for speeds higher than the @max_speed parameter. 391 * Any further motifications of config.mac_capabilities will override this. 392 */ 393 void phylink_limit_mac_speed(struct phylink_config *config, u32 max_speed) 394 { 395 int i; 396 397 for (i = 0; i < ARRAY_SIZE(phylink_caps_params) && 398 phylink_caps_params[i].speed > max_speed; i++) 399 config->mac_capabilities &= ~phylink_caps_params[i].mask; 400 } 401 EXPORT_SYMBOL_GPL(phylink_limit_mac_speed); 402 403 /** 404 * phylink_cap_from_speed_duplex - Get mac capability from speed/duplex 405 * @speed: the speed to search for 406 * @duplex: the duplex to search for 407 * 408 * Find the mac capability for a given speed and duplex. 409 * 410 * Return: A mask with the mac capability patching @speed and @duplex, or 0 if 411 * there were no matches. 412 */ 413 static unsigned long phylink_cap_from_speed_duplex(int speed, 414 unsigned int duplex) 415 { 416 int i; 417 418 for (i = 0; i < ARRAY_SIZE(phylink_caps_params); i++) { 419 if (speed == phylink_caps_params[i].speed && 420 duplex == phylink_caps_params[i].duplex) 421 return phylink_caps_params[i].mask; 422 } 423 424 return 0; 425 } 426 427 /** 428 * phylink_get_capabilities() - get capabilities for a given MAC 429 * @interface: phy interface mode defined by &typedef phy_interface_t 430 * @mac_capabilities: bitmask of MAC capabilities 431 * @rate_matching: type of rate matching being performed 432 * 433 * Get the MAC capabilities that are supported by the @interface mode and 434 * @mac_capabilities. 435 */ 436 static unsigned long phylink_get_capabilities(phy_interface_t interface, 437 unsigned long mac_capabilities, 438 int rate_matching) 439 { 440 unsigned long link_caps = phy_caps_from_interface(interface); 441 int max_speed = phylink_interface_max_speed(interface); 442 unsigned long caps = MAC_SYM_PAUSE | MAC_ASYM_PAUSE; 443 unsigned long matched_caps = 0; 444 445 caps |= phylink_link_caps_to_mac_caps(link_caps); 446 447 switch (rate_matching) { 448 case RATE_MATCH_OPEN_LOOP: 449 /* TODO */ 450 fallthrough; 451 case RATE_MATCH_NONE: 452 matched_caps = 0; 453 break; 454 case RATE_MATCH_PAUSE: { 455 /* The MAC must support asymmetric pause towards the local 456 * device for this. We could allow just symmetric pause, but 457 * then we might have to renegotiate if the link partner 458 * doesn't support pause. This is because there's no way to 459 * accept pause frames without transmitting them if we only 460 * support symmetric pause. 461 */ 462 if (!(mac_capabilities & MAC_SYM_PAUSE) || 463 !(mac_capabilities & MAC_ASYM_PAUSE)) 464 break; 465 466 /* We can't adapt if the MAC doesn't support the interface's 467 * max speed at full duplex. 468 */ 469 if (mac_capabilities & 470 phylink_cap_from_speed_duplex(max_speed, DUPLEX_FULL)) 471 matched_caps = GENMASK(__fls(caps), __fls(MAC_10HD)); 472 break; 473 } 474 case RATE_MATCH_CRS: 475 /* The MAC must support half duplex at the interface's max 476 * speed. 477 */ 478 if (mac_capabilities & 479 phylink_cap_from_speed_duplex(max_speed, DUPLEX_HALF)) { 480 matched_caps = GENMASK(__fls(caps), __fls(MAC_10HD)); 481 matched_caps &= mac_capabilities; 482 } 483 break; 484 } 485 486 return (caps & mac_capabilities) | matched_caps; 487 } 488 489 /** 490 * phylink_validate_mask_caps() - Restrict link modes based on caps 491 * @supported: ethtool bitmask for supported link modes. 492 * @state: pointer to a &struct phylink_link_state. 493 * @mac_capabilities: bitmask of MAC capabilities 494 * 495 * Calculate the supported link modes based on @mac_capabilities, and restrict 496 * @supported and @state based on that. Use this function if your capabiliies 497 * aren't constant, such as if they vary depending on the interface. 498 */ 499 static void phylink_validate_mask_caps(unsigned long *supported, 500 struct phylink_link_state *state, 501 unsigned long mac_capabilities) 502 { 503 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; 504 unsigned long caps; 505 506 phylink_set_port_modes(mask); 507 phylink_set(mask, Autoneg); 508 caps = phylink_get_capabilities(state->interface, mac_capabilities, 509 state->rate_matching); 510 phylink_caps_to_linkmodes(mask, caps); 511 512 linkmode_and(supported, supported, mask); 513 linkmode_and(state->advertising, state->advertising, mask); 514 } 515 516 static int phylink_validate_mac_and_pcs(struct phylink *pl, 517 unsigned long *supported, 518 struct phylink_link_state *state) 519 { 520 struct phylink_pcs *pcs = NULL; 521 unsigned long capabilities; 522 int ret; 523 524 /* Get the PCS for this interface mode */ 525 if (pl->mac_ops->mac_select_pcs) { 526 pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface); 527 if (IS_ERR(pcs)) 528 return PTR_ERR(pcs); 529 } 530 531 if (pcs) { 532 /* The PCS, if present, must be setup before phylink_create() 533 * has been called. If the ops is not initialised, print an 534 * error and backtrace rather than oopsing the kernel. 535 */ 536 if (!pcs->ops) { 537 phylink_err(pl, "interface %s: uninitialised PCS\n", 538 phy_modes(state->interface)); 539 dump_stack(); 540 return -EINVAL; 541 } 542 543 /* Ensure that this PCS supports the interface which the MAC 544 * returned it for. It is an error for the MAC to return a PCS 545 * that does not support the interface mode. 546 */ 547 if (!phy_interface_empty(pcs->supported_interfaces) && 548 !test_bit(state->interface, pcs->supported_interfaces)) { 549 phylink_err(pl, "MAC returned PCS which does not support %s\n", 550 phy_modes(state->interface)); 551 return -EINVAL; 552 } 553 554 /* Validate the link parameters with the PCS */ 555 if (pcs->ops->pcs_validate) { 556 ret = pcs->ops->pcs_validate(pcs, supported, state); 557 if (ret < 0 || phylink_is_empty_linkmode(supported)) 558 return -EINVAL; 559 560 /* Ensure the advertising mask is a subset of the 561 * supported mask. 562 */ 563 linkmode_and(state->advertising, state->advertising, 564 supported); 565 } 566 } 567 568 /* Then validate the link parameters with the MAC */ 569 if (pl->mac_ops->mac_get_caps) 570 capabilities = pl->mac_ops->mac_get_caps(pl->config, 571 state->interface); 572 else 573 capabilities = pl->config->mac_capabilities; 574 575 phylink_validate_mask_caps(supported, state, capabilities); 576 577 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; 578 } 579 580 static void phylink_validate_one(struct phylink *pl, struct phy_device *phy, 581 const unsigned long *supported, 582 const struct phylink_link_state *state, 583 phy_interface_t interface, 584 unsigned long *accum_supported, 585 unsigned long *accum_advertising) 586 { 587 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp_supported); 588 struct phylink_link_state tmp_state; 589 590 linkmode_copy(tmp_supported, supported); 591 592 tmp_state = *state; 593 tmp_state.interface = interface; 594 595 if (phy) 596 tmp_state.rate_matching = phy_get_rate_matching(phy, interface); 597 598 if (!phylink_validate_mac_and_pcs(pl, tmp_supported, &tmp_state)) { 599 phylink_dbg(pl, " interface %u (%s) rate match %s supports %*pbl\n", 600 interface, phy_modes(interface), 601 phy_rate_matching_to_str(tmp_state.rate_matching), 602 __ETHTOOL_LINK_MODE_MASK_NBITS, tmp_supported); 603 604 linkmode_or(accum_supported, accum_supported, tmp_supported); 605 linkmode_or(accum_advertising, accum_advertising, 606 tmp_state.advertising); 607 } 608 } 609 610 static int phylink_validate_mask(struct phylink *pl, struct phy_device *phy, 611 unsigned long *supported, 612 struct phylink_link_state *state, 613 const unsigned long *interfaces) 614 { 615 __ETHTOOL_DECLARE_LINK_MODE_MASK(all_adv) = { 0, }; 616 __ETHTOOL_DECLARE_LINK_MODE_MASK(all_s) = { 0, }; 617 int interface; 618 619 for_each_set_bit(interface, interfaces, PHY_INTERFACE_MODE_MAX) 620 phylink_validate_one(pl, phy, supported, state, interface, 621 all_s, all_adv); 622 623 linkmode_copy(supported, all_s); 624 linkmode_copy(state->advertising, all_adv); 625 626 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; 627 } 628 629 static int phylink_validate(struct phylink *pl, unsigned long *supported, 630 struct phylink_link_state *state) 631 { 632 const unsigned long *interfaces = pl->config->supported_interfaces; 633 634 if (state->interface == PHY_INTERFACE_MODE_NA) 635 return phylink_validate_mask(pl, NULL, supported, state, 636 interfaces); 637 638 if (!test_bit(state->interface, interfaces)) 639 return -EINVAL; 640 641 return phylink_validate_mac_and_pcs(pl, supported, state); 642 } 643 644 static void phylink_fill_fixedlink_supported(unsigned long *supported) 645 { 646 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, supported); 647 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, supported); 648 linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, supported); 649 linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, supported); 650 linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, supported); 651 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, supported); 652 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, supported); 653 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, supported); 654 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, supported); 655 linkmode_set_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, supported); 656 linkmode_set_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT, supported); 657 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, supported); 658 } 659 660 static int phylink_parse_fixedlink(struct phylink *pl, 661 const struct fwnode_handle *fwnode) 662 { 663 __ETHTOOL_DECLARE_LINK_MODE_MASK(match) = { 0, }; 664 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; 665 const struct link_capabilities *c; 666 struct fwnode_handle *fixed_node; 667 struct gpio_desc *desc; 668 u32 speed; 669 int ret; 670 671 fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link"); 672 if (fixed_node) { 673 ret = fwnode_property_read_u32(fixed_node, "speed", &speed); 674 675 pl->link_config.speed = speed; 676 pl->link_config.duplex = DUPLEX_HALF; 677 678 if (fwnode_property_read_bool(fixed_node, "full-duplex")) 679 pl->link_config.duplex = DUPLEX_FULL; 680 681 /* We treat the "pause" and "asym-pause" terminology as 682 * defining the link partner's ability. 683 */ 684 if (fwnode_property_read_bool(fixed_node, "pause")) 685 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 686 pl->link_config.lp_advertising); 687 if (fwnode_property_read_bool(fixed_node, "asym-pause")) 688 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 689 pl->link_config.lp_advertising); 690 691 if (ret == 0) { 692 desc = fwnode_gpiod_get_index(fixed_node, "link", 0, 693 GPIOD_IN, "?"); 694 695 if (!IS_ERR(desc)) 696 pl->link_gpio = desc; 697 else if (desc == ERR_PTR(-EPROBE_DEFER)) 698 ret = -EPROBE_DEFER; 699 } 700 fwnode_handle_put(fixed_node); 701 702 if (ret) 703 return ret; 704 } else { 705 u32 prop[5]; 706 707 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 708 NULL, 0); 709 if (ret != ARRAY_SIZE(prop)) { 710 phylink_err(pl, "broken fixed-link?\n"); 711 return -EINVAL; 712 } 713 714 phylink_warn(pl, "%pfw uses deprecated array-style fixed-link binding!\n", 715 fwnode); 716 717 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 718 prop, ARRAY_SIZE(prop)); 719 if (!ret) { 720 pl->link_config.duplex = prop[1] ? 721 DUPLEX_FULL : DUPLEX_HALF; 722 pl->link_config.speed = prop[2]; 723 if (prop[3]) 724 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 725 pl->link_config.lp_advertising); 726 if (prop[4]) 727 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 728 pl->link_config.lp_advertising); 729 } 730 } 731 732 if (pl->link_config.speed > SPEED_1000 && 733 pl->link_config.duplex != DUPLEX_FULL) 734 phylink_warn(pl, "fixed link specifies half duplex for %dMbps link?\n", 735 pl->link_config.speed); 736 737 linkmode_zero(pl->supported); 738 phylink_fill_fixedlink_supported(pl->supported); 739 740 linkmode_copy(pl->link_config.advertising, pl->supported); 741 phylink_validate(pl, pl->supported, &pl->link_config); 742 743 c = phy_caps_lookup(pl->link_config.speed, pl->link_config.duplex, 744 pl->supported, true); 745 if (c) 746 linkmode_and(match, pl->supported, c->linkmodes); 747 748 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, mask); 749 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, mask); 750 linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, mask); 751 linkmode_and(pl->supported, pl->supported, mask); 752 753 phylink_set(pl->supported, MII); 754 755 if (c) { 756 linkmode_or(pl->supported, pl->supported, match); 757 linkmode_or(pl->link_config.lp_advertising, 758 pl->link_config.lp_advertising, match); 759 } else { 760 phylink_warn(pl, "fixed link %s duplex %dMbps not recognised\n", 761 pl->link_config.duplex == DUPLEX_FULL ? "full" : "half", 762 pl->link_config.speed); 763 } 764 765 linkmode_and(pl->link_config.advertising, pl->link_config.advertising, 766 pl->supported); 767 768 pl->link_config.link = 1; 769 pl->link_config.an_complete = 1; 770 771 return 0; 772 } 773 774 static int phylink_parse_mode(struct phylink *pl, 775 const struct fwnode_handle *fwnode) 776 { 777 struct fwnode_handle *dn; 778 const char *managed; 779 unsigned long caps; 780 781 if (pl->config->default_an_inband) 782 pl->cfg_link_an_mode = MLO_AN_INBAND; 783 784 dn = fwnode_get_named_child_node(fwnode, "fixed-link"); 785 if (dn || fwnode_property_present(fwnode, "fixed-link")) 786 pl->cfg_link_an_mode = MLO_AN_FIXED; 787 fwnode_handle_put(dn); 788 789 if ((fwnode_property_read_string(fwnode, "managed", &managed) == 0 && 790 strcmp(managed, "in-band-status") == 0)) { 791 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 792 phylink_err(pl, 793 "can't use both fixed-link and in-band-status\n"); 794 return -EINVAL; 795 } 796 797 pl->cfg_link_an_mode = MLO_AN_INBAND; 798 } 799 800 if (pl->cfg_link_an_mode == MLO_AN_INBAND) { 801 linkmode_zero(pl->supported); 802 phylink_set(pl->supported, MII); 803 phylink_set(pl->supported, Autoneg); 804 phylink_set(pl->supported, Asym_Pause); 805 phylink_set(pl->supported, Pause); 806 807 switch (pl->link_config.interface) { 808 case PHY_INTERFACE_MODE_SGMII: 809 case PHY_INTERFACE_MODE_PSGMII: 810 case PHY_INTERFACE_MODE_QSGMII: 811 case PHY_INTERFACE_MODE_QUSGMII: 812 case PHY_INTERFACE_MODE_RGMII: 813 case PHY_INTERFACE_MODE_RGMII_ID: 814 case PHY_INTERFACE_MODE_RGMII_RXID: 815 case PHY_INTERFACE_MODE_RGMII_TXID: 816 case PHY_INTERFACE_MODE_RTBI: 817 case PHY_INTERFACE_MODE_1000BASEX: 818 case PHY_INTERFACE_MODE_2500BASEX: 819 case PHY_INTERFACE_MODE_5GBASER: 820 case PHY_INTERFACE_MODE_25GBASER: 821 case PHY_INTERFACE_MODE_USXGMII: 822 case PHY_INTERFACE_MODE_10G_QXGMII: 823 case PHY_INTERFACE_MODE_10GKR: 824 case PHY_INTERFACE_MODE_10GBASER: 825 case PHY_INTERFACE_MODE_XLGMII: 826 case PHY_INTERFACE_MODE_50GBASER: 827 case PHY_INTERFACE_MODE_LAUI: 828 case PHY_INTERFACE_MODE_100GBASEP: 829 caps = ~(MAC_SYM_PAUSE | MAC_ASYM_PAUSE); 830 caps = phylink_get_capabilities(pl->link_config.interface, caps, 831 RATE_MATCH_NONE); 832 phylink_caps_to_linkmodes(pl->supported, caps); 833 break; 834 835 default: 836 phylink_err(pl, 837 "incorrect link mode %s for in-band status\n", 838 phy_modes(pl->link_config.interface)); 839 return -EINVAL; 840 } 841 842 linkmode_copy(pl->link_config.advertising, pl->supported); 843 844 if (phylink_validate(pl, pl->supported, &pl->link_config)) { 845 phylink_err(pl, 846 "failed to validate link configuration for in-band status\n"); 847 return -EINVAL; 848 } 849 } 850 851 return 0; 852 } 853 854 static void phylink_apply_manual_flow(struct phylink *pl, 855 struct phylink_link_state *state) 856 { 857 /* If autoneg is disabled, pause AN is also disabled */ 858 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 859 state->advertising)) 860 state->pause &= ~MLO_PAUSE_AN; 861 862 /* Manual configuration of pause modes */ 863 if (!(pl->link_config.pause & MLO_PAUSE_AN)) 864 state->pause = pl->link_config.pause; 865 } 866 867 static void phylink_resolve_an_pause(struct phylink_link_state *state) 868 { 869 bool tx_pause, rx_pause; 870 871 if (state->duplex == DUPLEX_FULL) { 872 linkmode_resolve_pause(state->advertising, 873 state->lp_advertising, 874 &tx_pause, &rx_pause); 875 if (tx_pause) 876 state->pause |= MLO_PAUSE_TX; 877 if (rx_pause) 878 state->pause |= MLO_PAUSE_RX; 879 } 880 } 881 882 static unsigned int phylink_pcs_inband_caps(struct phylink_pcs *pcs, 883 phy_interface_t interface) 884 { 885 if (pcs && pcs->ops->pcs_inband_caps) 886 return pcs->ops->pcs_inband_caps(pcs, interface); 887 888 return 0; 889 } 890 891 static void phylink_pcs_pre_config(struct phylink_pcs *pcs, 892 phy_interface_t interface) 893 { 894 if (pcs && pcs->ops->pcs_pre_config) 895 pcs->ops->pcs_pre_config(pcs, interface); 896 } 897 898 static int phylink_pcs_post_config(struct phylink_pcs *pcs, 899 phy_interface_t interface) 900 { 901 int err = 0; 902 903 if (pcs && pcs->ops->pcs_post_config) 904 err = pcs->ops->pcs_post_config(pcs, interface); 905 906 return err; 907 } 908 909 static void phylink_pcs_disable(struct phylink_pcs *pcs) 910 { 911 if (pcs && pcs->ops->pcs_disable) 912 pcs->ops->pcs_disable(pcs); 913 } 914 915 static int phylink_pcs_enable(struct phylink_pcs *pcs) 916 { 917 int err = 0; 918 919 if (pcs && pcs->ops->pcs_enable) 920 err = pcs->ops->pcs_enable(pcs); 921 922 return err; 923 } 924 925 static int phylink_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode, 926 const struct phylink_link_state *state, 927 bool permit_pause_to_mac) 928 { 929 if (!pcs) 930 return 0; 931 932 return pcs->ops->pcs_config(pcs, neg_mode, state->interface, 933 state->advertising, permit_pause_to_mac); 934 } 935 936 static void phylink_pcs_link_up(struct phylink_pcs *pcs, unsigned int neg_mode, 937 phy_interface_t interface, int speed, 938 int duplex) 939 { 940 if (pcs && pcs->ops->pcs_link_up) 941 pcs->ops->pcs_link_up(pcs, neg_mode, interface, speed, duplex); 942 } 943 944 static void phylink_pcs_disable_eee(struct phylink_pcs *pcs) 945 { 946 if (pcs && pcs->ops->pcs_disable_eee) 947 pcs->ops->pcs_disable_eee(pcs); 948 } 949 950 static void phylink_pcs_enable_eee(struct phylink_pcs *pcs) 951 { 952 if (pcs && pcs->ops->pcs_enable_eee) 953 pcs->ops->pcs_enable_eee(pcs); 954 } 955 956 /* Query inband for a specific interface mode, asking the MAC for the 957 * PCS which will be used to handle the interface mode. 958 */ 959 static unsigned int phylink_inband_caps(struct phylink *pl, 960 phy_interface_t interface) 961 { 962 struct phylink_pcs *pcs; 963 964 if (!pl->mac_ops->mac_select_pcs) 965 return 0; 966 967 pcs = pl->mac_ops->mac_select_pcs(pl->config, interface); 968 if (!pcs) 969 return 0; 970 971 return phylink_pcs_inband_caps(pcs, interface); 972 } 973 974 static void phylink_pcs_poll_stop(struct phylink *pl) 975 { 976 if (pl->cfg_link_an_mode == MLO_AN_INBAND) 977 timer_delete(&pl->link_poll); 978 } 979 980 static void phylink_pcs_poll_start(struct phylink *pl) 981 { 982 if (pl->pcs && pl->pcs->poll && pl->cfg_link_an_mode == MLO_AN_INBAND) 983 mod_timer(&pl->link_poll, jiffies + HZ); 984 } 985 986 int phylink_pcs_pre_init(struct phylink *pl, struct phylink_pcs *pcs) 987 { 988 int ret = 0; 989 990 /* Signal to PCS driver that MAC requires RX clock for init */ 991 if (pl->config->mac_requires_rxc) 992 pcs->rxc_always_on = true; 993 994 if (pcs->ops->pcs_pre_init) 995 ret = pcs->ops->pcs_pre_init(pcs); 996 997 return ret; 998 } 999 EXPORT_SYMBOL_GPL(phylink_pcs_pre_init); 1000 1001 static void phylink_mac_config(struct phylink *pl, 1002 const struct phylink_link_state *state) 1003 { 1004 struct phylink_link_state st = *state; 1005 1006 /* Stop drivers incorrectly using these */ 1007 linkmode_zero(st.lp_advertising); 1008 st.speed = SPEED_UNKNOWN; 1009 st.duplex = DUPLEX_UNKNOWN; 1010 st.an_complete = false; 1011 st.link = false; 1012 1013 phylink_dbg(pl, 1014 "%s: mode=%s/%s/%s adv=%*pb pause=%02x\n", 1015 __func__, phylink_an_mode_str(pl->act_link_an_mode), 1016 phy_modes(st.interface), 1017 phy_rate_matching_to_str(st.rate_matching), 1018 __ETHTOOL_LINK_MODE_MASK_NBITS, st.advertising, 1019 st.pause); 1020 1021 pl->mac_ops->mac_config(pl->config, pl->act_link_an_mode, &st); 1022 } 1023 1024 static void phylink_pcs_an_restart(struct phylink *pl) 1025 { 1026 if (pl->pcs && linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 1027 pl->link_config.advertising) && 1028 phy_interface_mode_is_8023z(pl->link_config.interface) && 1029 phylink_autoneg_inband(pl->act_link_an_mode)) 1030 pl->pcs->ops->pcs_an_restart(pl->pcs); 1031 } 1032 1033 enum inband_type { 1034 INBAND_NONE, 1035 INBAND_CISCO_SGMII, 1036 INBAND_BASEX, 1037 }; 1038 1039 static enum inband_type phylink_get_inband_type(phy_interface_t interface) 1040 { 1041 switch (interface) { 1042 case PHY_INTERFACE_MODE_SGMII: 1043 case PHY_INTERFACE_MODE_QSGMII: 1044 case PHY_INTERFACE_MODE_QUSGMII: 1045 case PHY_INTERFACE_MODE_USXGMII: 1046 case PHY_INTERFACE_MODE_10G_QXGMII: 1047 /* These protocols are designed for use with a PHY which 1048 * communicates its negotiation result back to the MAC via 1049 * inband communication. Note: there exist PHYs that run 1050 * with SGMII but do not send the inband data. 1051 */ 1052 return INBAND_CISCO_SGMII; 1053 1054 case PHY_INTERFACE_MODE_1000BASEX: 1055 case PHY_INTERFACE_MODE_2500BASEX: 1056 /* 1000base-X is designed for use media-side for Fibre 1057 * connections, and thus the Autoneg bit needs to be 1058 * taken into account. We also do this for 2500base-X 1059 * as well, but drivers may not support this, so may 1060 * need to override this. 1061 */ 1062 return INBAND_BASEX; 1063 1064 default: 1065 return INBAND_NONE; 1066 } 1067 } 1068 1069 /** 1070 * phylink_pcs_neg_mode() - helper to determine PCS inband mode 1071 * @pl: a pointer to a &struct phylink returned from phylink_create() 1072 * @pcs: a pointer to &struct phylink_pcs 1073 * @interface: interface mode to be used 1074 * @advertising: adertisement ethtool link mode mask 1075 * 1076 * Determines the negotiation mode to be used by the PCS, and returns 1077 * one of: 1078 * 1079 * - %PHYLINK_PCS_NEG_NONE: interface mode does not support inband 1080 * - %PHYLINK_PCS_NEG_OUTBAND: an out of band mode (e.g. reading the PHY) 1081 * will be used. 1082 * - %PHYLINK_PCS_NEG_INBAND_DISABLED: inband mode selected but autoneg 1083 * disabled 1084 * - %PHYLINK_PCS_NEG_INBAND_ENABLED: inband mode selected and autoneg enabled 1085 * 1086 * Note: this is for cases where the PCS itself is involved in negotiation 1087 * (e.g. Clause 37, SGMII and similar) not Clause 73. 1088 */ 1089 static void phylink_pcs_neg_mode(struct phylink *pl, struct phylink_pcs *pcs, 1090 phy_interface_t interface, 1091 const unsigned long *advertising) 1092 { 1093 unsigned int pcs_ib_caps = 0; 1094 unsigned int phy_ib_caps = 0; 1095 unsigned int neg_mode, mode; 1096 enum inband_type type; 1097 1098 type = phylink_get_inband_type(interface); 1099 if (type == INBAND_NONE) { 1100 pl->pcs_neg_mode = PHYLINK_PCS_NEG_NONE; 1101 pl->act_link_an_mode = pl->req_link_an_mode; 1102 return; 1103 } 1104 1105 mode = pl->req_link_an_mode; 1106 1107 pl->phy_ib_mode = 0; 1108 1109 if (pcs) 1110 pcs_ib_caps = phylink_pcs_inband_caps(pcs, interface); 1111 1112 if (pl->phydev) 1113 phy_ib_caps = phy_inband_caps(pl->phydev, interface); 1114 1115 phylink_dbg(pl, "interface %s inband modes: pcs=%02x phy=%02x\n", 1116 phy_modes(interface), pcs_ib_caps, phy_ib_caps); 1117 1118 if (!phylink_autoneg_inband(mode)) { 1119 bool pcs_ib_only = false; 1120 bool phy_ib_only = false; 1121 1122 if (pcs_ib_caps && pcs_ib_caps != LINK_INBAND_DISABLE) { 1123 /* PCS supports reporting in-band capabilities, and 1124 * supports more than disable mode. 1125 */ 1126 if (pcs_ib_caps & LINK_INBAND_DISABLE) 1127 neg_mode = PHYLINK_PCS_NEG_OUTBAND; 1128 else if (pcs_ib_caps & LINK_INBAND_ENABLE) 1129 pcs_ib_only = true; 1130 } 1131 1132 if (phy_ib_caps && phy_ib_caps != LINK_INBAND_DISABLE) { 1133 /* PHY supports in-band capabilities, and supports 1134 * more than disable mode. 1135 */ 1136 if (phy_ib_caps & LINK_INBAND_DISABLE) 1137 pl->phy_ib_mode = LINK_INBAND_DISABLE; 1138 else if (phy_ib_caps & LINK_INBAND_BYPASS) 1139 pl->phy_ib_mode = LINK_INBAND_BYPASS; 1140 else if (phy_ib_caps & LINK_INBAND_ENABLE) 1141 phy_ib_only = true; 1142 } 1143 1144 /* If either the PCS or PHY requires inband to be enabled, 1145 * this is an invalid configuration. Provide a diagnostic 1146 * message for this case, but don't try to force the issue. 1147 */ 1148 if (pcs_ib_only || phy_ib_only) 1149 phylink_warn(pl, 1150 "firmware wants %s mode, but %s%s%s requires inband\n", 1151 phylink_an_mode_str(mode), 1152 pcs_ib_only ? "PCS" : "", 1153 pcs_ib_only && phy_ib_only ? " and " : "", 1154 phy_ib_only ? "PHY" : ""); 1155 1156 neg_mode = PHYLINK_PCS_NEG_OUTBAND; 1157 } else if (type == INBAND_CISCO_SGMII || pl->phydev) { 1158 /* For SGMII modes which are designed to be used with PHYs, or 1159 * Base-X with a PHY, we try to use in-band mode where-ever 1160 * possible. However, there are some PHYs e.g. BCM84881 which 1161 * do not support in-band. 1162 */ 1163 const unsigned int inband_ok = LINK_INBAND_ENABLE | 1164 LINK_INBAND_BYPASS; 1165 const unsigned int outband_ok = LINK_INBAND_DISABLE | 1166 LINK_INBAND_BYPASS; 1167 /* PCS PHY 1168 * D E D E 1169 * 0 0 0 0 no information inband enabled 1170 * 1 0 0 0 pcs doesn't support outband 1171 * 0 1 0 0 pcs required inband enabled 1172 * 1 1 0 0 pcs optional inband enabled 1173 * 0 0 1 0 phy doesn't support outband 1174 * 1 0 1 0 pcs+phy doesn't support outband 1175 * 0 1 1 0 pcs required, phy doesn't support, invalid 1176 * 1 1 1 0 pcs optional, phy doesn't support, outband 1177 * 0 0 0 1 phy required inband enabled 1178 * 1 0 0 1 pcs doesn't support, phy required, invalid 1179 * 0 1 0 1 pcs+phy required inband enabled 1180 * 1 1 0 1 pcs optional, phy required inband enabled 1181 * 0 0 1 1 phy optional inband enabled 1182 * 1 0 1 1 pcs doesn't support, phy optional, outband 1183 * 0 1 1 1 pcs required, phy optional inband enabled 1184 * 1 1 1 1 pcs+phy optional inband enabled 1185 */ 1186 if ((!pcs_ib_caps || pcs_ib_caps & inband_ok) && 1187 (!phy_ib_caps || phy_ib_caps & inband_ok)) { 1188 /* In-band supported or unknown at both ends. Enable 1189 * in-band mode with or without bypass at the PHY. 1190 */ 1191 if (phy_ib_caps & LINK_INBAND_ENABLE) 1192 pl->phy_ib_mode = LINK_INBAND_ENABLE; 1193 else if (phy_ib_caps & LINK_INBAND_BYPASS) 1194 pl->phy_ib_mode = LINK_INBAND_BYPASS; 1195 1196 neg_mode = PHYLINK_PCS_NEG_INBAND_ENABLED; 1197 } else if ((!pcs_ib_caps || pcs_ib_caps & outband_ok) && 1198 (!phy_ib_caps || phy_ib_caps & outband_ok)) { 1199 /* Either in-band not supported at at least one end. 1200 * In-band bypass at the other end is possible. 1201 */ 1202 if (phy_ib_caps & LINK_INBAND_DISABLE) 1203 pl->phy_ib_mode = LINK_INBAND_DISABLE; 1204 else if (phy_ib_caps & LINK_INBAND_BYPASS) 1205 pl->phy_ib_mode = LINK_INBAND_BYPASS; 1206 1207 neg_mode = PHYLINK_PCS_NEG_OUTBAND; 1208 if (pl->phydev) 1209 mode = MLO_AN_PHY; 1210 } else { 1211 /* invalid */ 1212 phylink_warn(pl, "%s: incompatible in-band capabilities, trying in-band", 1213 phy_modes(interface)); 1214 neg_mode = PHYLINK_PCS_NEG_INBAND_ENABLED; 1215 } 1216 } else { 1217 /* For Base-X without a PHY */ 1218 if (pcs_ib_caps == LINK_INBAND_DISABLE) 1219 /* If the PCS doesn't support inband, then inband must 1220 * be disabled. 1221 */ 1222 neg_mode = PHYLINK_PCS_NEG_INBAND_DISABLED; 1223 else if (pcs_ib_caps == LINK_INBAND_ENABLE) 1224 /* If the PCS requires inband, then inband must always 1225 * be enabled. 1226 */ 1227 neg_mode = PHYLINK_PCS_NEG_INBAND_ENABLED; 1228 else if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 1229 advertising)) 1230 neg_mode = PHYLINK_PCS_NEG_INBAND_ENABLED; 1231 else 1232 neg_mode = PHYLINK_PCS_NEG_INBAND_DISABLED; 1233 } 1234 1235 pl->pcs_neg_mode = neg_mode; 1236 pl->act_link_an_mode = mode; 1237 } 1238 1239 static void phylink_major_config(struct phylink *pl, bool restart, 1240 const struct phylink_link_state *state) 1241 { 1242 struct phylink_pcs *pcs = NULL; 1243 bool pcs_changed = false; 1244 unsigned int rate_kbd; 1245 int err; 1246 1247 phylink_dbg(pl, "major config, requested %s/%s\n", 1248 phylink_an_mode_str(pl->req_link_an_mode), 1249 phy_modes(state->interface)); 1250 1251 pl->major_config_failed = false; 1252 1253 if (pl->mac_ops->mac_select_pcs) { 1254 pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface); 1255 if (IS_ERR(pcs)) { 1256 phylink_err(pl, 1257 "mac_select_pcs unexpectedly failed: %pe\n", 1258 pcs); 1259 1260 pl->major_config_failed = true; 1261 return; 1262 } 1263 1264 pcs_changed = pl->pcs != pcs; 1265 } 1266 1267 phylink_pcs_neg_mode(pl, pcs, state->interface, state->advertising); 1268 1269 phylink_dbg(pl, "major config, active %s/%s/%s\n", 1270 phylink_an_mode_str(pl->act_link_an_mode), 1271 phylink_pcs_mode_str(pl->pcs_neg_mode), 1272 phy_modes(state->interface)); 1273 1274 phylink_pcs_poll_stop(pl); 1275 1276 if (pl->mac_ops->mac_prepare) { 1277 err = pl->mac_ops->mac_prepare(pl->config, pl->act_link_an_mode, 1278 state->interface); 1279 if (err < 0) { 1280 phylink_err(pl, "mac_prepare failed: %pe\n", 1281 ERR_PTR(err)); 1282 pl->major_config_failed = true; 1283 return; 1284 } 1285 } 1286 1287 /* If we have a new PCS, switch to the new PCS after preparing the MAC 1288 * for the change. 1289 */ 1290 if (pcs_changed) { 1291 phylink_pcs_disable(pl->pcs); 1292 1293 if (pl->pcs) 1294 pl->pcs->phylink = NULL; 1295 1296 pcs->phylink = pl; 1297 1298 pl->pcs = pcs; 1299 } 1300 1301 if (pl->pcs) 1302 phylink_pcs_pre_config(pl->pcs, state->interface); 1303 1304 phylink_mac_config(pl, state); 1305 1306 if (pl->pcs) { 1307 err = phylink_pcs_post_config(pl->pcs, state->interface); 1308 if (err < 0) { 1309 phylink_err(pl, "pcs_post_config failed: %pe\n", 1310 ERR_PTR(err)); 1311 1312 pl->major_config_failed = true; 1313 } 1314 } 1315 1316 if (pl->pcs_state == PCS_STATE_STARTING || pcs_changed) 1317 phylink_pcs_enable(pl->pcs); 1318 1319 err = phylink_pcs_config(pl->pcs, pl->pcs_neg_mode, state, 1320 !!(pl->link_config.pause & MLO_PAUSE_AN)); 1321 if (err < 0) { 1322 phylink_err(pl, "pcs_config failed: %pe\n", ERR_PTR(err)); 1323 pl->major_config_failed = true; 1324 } else if (err > 0) { 1325 restart = true; 1326 } 1327 1328 if (restart) 1329 phylink_pcs_an_restart(pl); 1330 1331 if (pl->mac_ops->mac_finish) { 1332 err = pl->mac_ops->mac_finish(pl->config, pl->act_link_an_mode, 1333 state->interface); 1334 if (err < 0) { 1335 phylink_err(pl, "mac_finish failed: %pe\n", 1336 ERR_PTR(err)); 1337 1338 pl->major_config_failed = true; 1339 } 1340 } 1341 1342 if (pl->phydev && pl->phy_ib_mode) { 1343 err = phy_config_inband(pl->phydev, pl->phy_ib_mode); 1344 if (err < 0) { 1345 phylink_err(pl, "phy_config_inband: %pe\n", 1346 ERR_PTR(err)); 1347 1348 pl->major_config_failed = true; 1349 } 1350 } 1351 1352 if (pl->sfp_bus) { 1353 rate_kbd = phylink_interface_signal_rate(state->interface); 1354 if (rate_kbd) 1355 sfp_upstream_set_signal_rate(pl->sfp_bus, rate_kbd); 1356 } 1357 1358 phylink_pcs_poll_start(pl); 1359 } 1360 1361 /* 1362 * Reconfigure for a change of inband advertisement. 1363 * If we have a separate PCS, we only need to call its pcs_config() method, 1364 * and then restart AN if it indicates something changed. Otherwise, we do 1365 * the full MAC reconfiguration. 1366 */ 1367 static int phylink_change_inband_advert(struct phylink *pl) 1368 { 1369 int ret; 1370 1371 if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) 1372 return 0; 1373 1374 phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__, 1375 phylink_an_mode_str(pl->req_link_an_mode), 1376 phy_modes(pl->link_config.interface), 1377 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->link_config.advertising, 1378 pl->link_config.pause); 1379 1380 /* Recompute the PCS neg mode */ 1381 phylink_pcs_neg_mode(pl, pl->pcs, pl->link_config.interface, 1382 pl->link_config.advertising); 1383 1384 /* Modern PCS-based method; update the advert at the PCS, and 1385 * restart negotiation if the pcs_config() helper indicates that 1386 * the programmed advertisement has changed. 1387 */ 1388 ret = phylink_pcs_config(pl->pcs, pl->pcs_neg_mode, &pl->link_config, 1389 !!(pl->link_config.pause & MLO_PAUSE_AN)); 1390 if (ret < 0) 1391 return ret; 1392 1393 if (ret > 0) 1394 phylink_pcs_an_restart(pl); 1395 1396 return 0; 1397 } 1398 1399 static void phylink_mac_pcs_get_state(struct phylink *pl, 1400 struct phylink_link_state *state) 1401 { 1402 struct phylink_pcs *pcs; 1403 bool autoneg; 1404 1405 linkmode_copy(state->advertising, pl->link_config.advertising); 1406 linkmode_zero(state->lp_advertising); 1407 state->interface = pl->link_config.interface; 1408 state->rate_matching = pl->link_config.rate_matching; 1409 state->an_complete = 0; 1410 state->link = 1; 1411 1412 autoneg = pl->pcs_neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED; 1413 if (autoneg) { 1414 state->speed = SPEED_UNKNOWN; 1415 state->duplex = DUPLEX_UNKNOWN; 1416 state->pause = MLO_PAUSE_NONE; 1417 } else { 1418 state->speed = pl->link_config.speed; 1419 state->duplex = pl->link_config.duplex; 1420 state->pause = pl->link_config.pause; 1421 } 1422 1423 pcs = pl->pcs; 1424 if (pcs) 1425 pcs->ops->pcs_get_state(pcs, pl->pcs_neg_mode, state); 1426 else 1427 state->link = 0; 1428 } 1429 1430 /* The fixed state is... fixed except for the link state, 1431 * which may be determined by a GPIO or a callback. 1432 */ 1433 static void phylink_get_fixed_state(struct phylink *pl, 1434 struct phylink_link_state *state) 1435 { 1436 *state = pl->link_config; 1437 if (pl->config->get_fixed_state) 1438 pl->config->get_fixed_state(pl->config, state); 1439 else if (pl->link_gpio) 1440 state->link = !!gpiod_get_value_cansleep(pl->link_gpio); 1441 1442 state->pause = MLO_PAUSE_NONE; 1443 phylink_resolve_an_pause(state); 1444 } 1445 1446 static void phylink_mac_initial_config(struct phylink *pl, bool force_restart) 1447 { 1448 struct phylink_link_state link_state; 1449 struct phy_device *phy = pl->phydev; 1450 1451 switch (pl->req_link_an_mode) { 1452 case MLO_AN_PHY: 1453 link_state = pl->phy_state; 1454 break; 1455 1456 case MLO_AN_FIXED: 1457 phylink_get_fixed_state(pl, &link_state); 1458 break; 1459 1460 case MLO_AN_INBAND: 1461 link_state = pl->link_config; 1462 if (link_state.interface == PHY_INTERFACE_MODE_SGMII) 1463 link_state.pause = MLO_PAUSE_NONE; 1464 break; 1465 1466 default: /* can't happen */ 1467 return; 1468 } 1469 1470 link_state.link = false; 1471 1472 phylink_apply_manual_flow(pl, &link_state); 1473 if (phy) 1474 mutex_lock(&phy->lock); 1475 phylink_major_config(pl, force_restart, &link_state); 1476 if (phy) 1477 mutex_unlock(&phy->lock); 1478 } 1479 1480 static const char *phylink_pause_to_str(int pause) 1481 { 1482 switch (pause & MLO_PAUSE_TXRX_MASK) { 1483 case MLO_PAUSE_TX | MLO_PAUSE_RX: 1484 return "rx/tx"; 1485 case MLO_PAUSE_TX: 1486 return "tx"; 1487 case MLO_PAUSE_RX: 1488 return "rx"; 1489 default: 1490 return "off"; 1491 } 1492 } 1493 1494 static void phylink_deactivate_lpi(struct phylink *pl) 1495 { 1496 if (pl->mac_enable_tx_lpi) { 1497 pl->mac_enable_tx_lpi = false; 1498 1499 phylink_dbg(pl, "disabling LPI\n"); 1500 1501 pl->mac_ops->mac_disable_tx_lpi(pl->config); 1502 1503 phylink_pcs_disable_eee(pl->pcs); 1504 } 1505 } 1506 1507 static void phylink_activate_lpi(struct phylink *pl) 1508 { 1509 int err; 1510 1511 if (!test_bit(pl->cur_interface, pl->config->lpi_interfaces)) { 1512 phylink_dbg(pl, "MAC does not support LPI with %s\n", 1513 phy_modes(pl->cur_interface)); 1514 return; 1515 } 1516 1517 phylink_dbg(pl, "LPI timer %uus, tx clock stop %u\n", 1518 pl->mac_tx_lpi_timer, pl->mac_tx_clk_stop); 1519 1520 phylink_pcs_enable_eee(pl->pcs); 1521 1522 err = pl->mac_ops->mac_enable_tx_lpi(pl->config, pl->mac_tx_lpi_timer, 1523 pl->mac_tx_clk_stop); 1524 if (err) { 1525 phylink_pcs_disable_eee(pl->pcs); 1526 phylink_err(pl, "%ps() failed: %pe\n", 1527 pl->mac_ops->mac_enable_tx_lpi, ERR_PTR(err)); 1528 return; 1529 } 1530 1531 pl->mac_enable_tx_lpi = true; 1532 } 1533 1534 static void phylink_link_up(struct phylink *pl, 1535 struct phylink_link_state link_state) 1536 { 1537 struct net_device *ndev = pl->netdev; 1538 int speed, duplex; 1539 bool rx_pause; 1540 1541 speed = link_state.speed; 1542 duplex = link_state.duplex; 1543 rx_pause = !!(link_state.pause & MLO_PAUSE_RX); 1544 1545 switch (link_state.rate_matching) { 1546 case RATE_MATCH_PAUSE: 1547 /* The PHY is doing rate matchion from the media rate (in 1548 * the link_state) to the interface speed, and will send 1549 * pause frames to the MAC to limit its transmission speed. 1550 */ 1551 speed = phylink_interface_max_speed(link_state.interface); 1552 duplex = DUPLEX_FULL; 1553 rx_pause = true; 1554 break; 1555 1556 case RATE_MATCH_CRS: 1557 /* The PHY is doing rate matchion from the media rate (in 1558 * the link_state) to the interface speed, and will cause 1559 * collisions to the MAC to limit its transmission speed. 1560 */ 1561 speed = phylink_interface_max_speed(link_state.interface); 1562 duplex = DUPLEX_HALF; 1563 break; 1564 } 1565 1566 pl->cur_interface = link_state.interface; 1567 1568 phylink_pcs_link_up(pl->pcs, pl->pcs_neg_mode, pl->cur_interface, speed, 1569 duplex); 1570 1571 pl->mac_ops->mac_link_up(pl->config, pl->phydev, pl->act_link_an_mode, 1572 pl->cur_interface, speed, duplex, 1573 !!(link_state.pause & MLO_PAUSE_TX), rx_pause); 1574 1575 if (pl->mac_supports_eee && pl->phy_enable_tx_lpi) 1576 phylink_activate_lpi(pl); 1577 1578 if (ndev) 1579 netif_carrier_on(ndev); 1580 1581 phylink_info(pl, 1582 "Link is Up - %s/%s - flow control %s\n", 1583 phy_speed_to_str(link_state.speed), 1584 phy_duplex_to_str(link_state.duplex), 1585 phylink_pause_to_str(link_state.pause)); 1586 } 1587 1588 static void phylink_link_down(struct phylink *pl) 1589 { 1590 struct net_device *ndev = pl->netdev; 1591 1592 if (ndev) 1593 netif_carrier_off(ndev); 1594 1595 phylink_deactivate_lpi(pl); 1596 1597 pl->mac_ops->mac_link_down(pl->config, pl->act_link_an_mode, 1598 pl->cur_interface); 1599 phylink_info(pl, "Link is Down\n"); 1600 } 1601 1602 static bool phylink_link_is_up(struct phylink *pl) 1603 { 1604 return pl->netdev ? netif_carrier_ok(pl->netdev) : pl->old_link_state; 1605 } 1606 1607 static void phylink_resolve(struct work_struct *w) 1608 { 1609 struct phylink *pl = container_of(w, struct phylink, resolve); 1610 struct phylink_link_state link_state; 1611 bool mac_config = false; 1612 bool retrigger = false; 1613 struct phy_device *phy; 1614 bool cur_link_state; 1615 1616 mutex_lock(&pl->phydev_mutex); 1617 phy = pl->phydev; 1618 if (phy) 1619 mutex_lock(&phy->lock); 1620 mutex_lock(&pl->state_mutex); 1621 cur_link_state = phylink_link_is_up(pl); 1622 1623 if (pl->phylink_disable_state) { 1624 pl->link_failed = false; 1625 link_state.link = false; 1626 } else if (pl->link_failed) { 1627 link_state.link = false; 1628 retrigger = true; 1629 } else if (pl->act_link_an_mode == MLO_AN_FIXED) { 1630 phylink_get_fixed_state(pl, &link_state); 1631 mac_config = link_state.link; 1632 } else if (pl->act_link_an_mode == MLO_AN_PHY) { 1633 link_state = pl->phy_state; 1634 mac_config = link_state.link; 1635 } else { 1636 phylink_mac_pcs_get_state(pl, &link_state); 1637 1638 /* The PCS may have a latching link-fail indicator. If the link 1639 * was up, bring the link down and re-trigger the resolve. 1640 * Otherwise, re-read the PCS state to get the current status 1641 * of the link. 1642 */ 1643 if (!link_state.link) { 1644 if (cur_link_state) 1645 retrigger = true; 1646 else 1647 phylink_mac_pcs_get_state(pl, &link_state); 1648 } 1649 1650 /* If we have a phy, the "up" state is the union of both the 1651 * PHY and the MAC 1652 */ 1653 if (phy) 1654 link_state.link &= pl->phy_state.link; 1655 1656 /* Only update if the PHY link is up */ 1657 if (phy && pl->phy_state.link) { 1658 /* If the interface has changed, force a link down 1659 * event if the link isn't already down, and re-resolve. 1660 */ 1661 if (link_state.interface != pl->phy_state.interface) { 1662 retrigger = true; 1663 link_state.link = false; 1664 } 1665 1666 link_state.interface = pl->phy_state.interface; 1667 1668 /* If we are doing rate matching, then the link 1669 * speed/duplex comes from the PHY 1670 */ 1671 if (pl->phy_state.rate_matching) { 1672 link_state.rate_matching = 1673 pl->phy_state.rate_matching; 1674 link_state.speed = pl->phy_state.speed; 1675 link_state.duplex = pl->phy_state.duplex; 1676 } 1677 1678 /* If we have a PHY, we need to update with the PHY 1679 * flow control bits. 1680 */ 1681 link_state.pause = pl->phy_state.pause; 1682 mac_config = true; 1683 } 1684 } 1685 1686 if (pl->act_link_an_mode != MLO_AN_FIXED) 1687 phylink_apply_manual_flow(pl, &link_state); 1688 1689 if ((mac_config && link_state.interface != pl->link_config.interface) || 1690 pl->force_major_config) { 1691 /* The interface has changed or a forced major configuration 1692 * was requested, so force the link down and then reconfigure. 1693 */ 1694 if (cur_link_state) { 1695 phylink_link_down(pl); 1696 cur_link_state = false; 1697 } 1698 phylink_major_config(pl, false, &link_state); 1699 pl->link_config.interface = link_state.interface; 1700 pl->force_major_config = false; 1701 } 1702 1703 /* If configuration of the interface failed, force the link down 1704 * until we get a successful configuration. 1705 */ 1706 if (pl->major_config_failed) 1707 link_state.link = false; 1708 1709 if (link_state.link != cur_link_state) { 1710 pl->old_link_state = link_state.link; 1711 if (!link_state.link) 1712 phylink_link_down(pl); 1713 else 1714 phylink_link_up(pl, link_state); 1715 } 1716 if (!link_state.link && retrigger) { 1717 pl->link_failed = false; 1718 queue_work(system_power_efficient_wq, &pl->resolve); 1719 } 1720 mutex_unlock(&pl->state_mutex); 1721 if (phy) 1722 mutex_unlock(&phy->lock); 1723 mutex_unlock(&pl->phydev_mutex); 1724 } 1725 1726 static void phylink_run_resolve(struct phylink *pl) 1727 { 1728 if (!pl->phylink_disable_state) 1729 queue_work(system_power_efficient_wq, &pl->resolve); 1730 } 1731 1732 static void phylink_run_resolve_and_disable(struct phylink *pl, int bit) 1733 { 1734 unsigned long state = pl->phylink_disable_state; 1735 1736 set_bit(bit, &pl->phylink_disable_state); 1737 if (state == 0) { 1738 queue_work(system_power_efficient_wq, &pl->resolve); 1739 flush_work(&pl->resolve); 1740 } 1741 } 1742 1743 static void phylink_enable_and_run_resolve(struct phylink *pl, int bit) 1744 { 1745 clear_bit(bit, &pl->phylink_disable_state); 1746 phylink_run_resolve(pl); 1747 } 1748 1749 static void phylink_fixed_poll(struct timer_list *t) 1750 { 1751 struct phylink *pl = container_of(t, struct phylink, link_poll); 1752 1753 mod_timer(t, jiffies + HZ); 1754 1755 phylink_run_resolve(pl); 1756 } 1757 1758 static const struct sfp_upstream_ops sfp_phylink_ops; 1759 1760 static int phylink_register_sfp(struct phylink *pl, 1761 const struct fwnode_handle *fwnode) 1762 { 1763 struct sfp_bus *bus; 1764 int ret; 1765 1766 if (!fwnode) 1767 return 0; 1768 1769 bus = sfp_bus_find_fwnode(fwnode); 1770 if (IS_ERR(bus)) { 1771 phylink_err(pl, "unable to attach SFP bus: %pe\n", bus); 1772 return PTR_ERR(bus); 1773 } 1774 1775 pl->sfp_bus = bus; 1776 1777 ret = sfp_bus_add_upstream(bus, pl, &sfp_phylink_ops); 1778 sfp_bus_put(bus); 1779 1780 return ret; 1781 } 1782 1783 /** 1784 * phylink_set_fixed_link() - set the fixed link 1785 * @pl: a pointer to a &struct phylink returned from phylink_create() 1786 * @state: a pointer to a struct phylink_link_state. 1787 * 1788 * This function is used when the link parameters are known and do not change, 1789 * making it suitable for certain types of network connections. 1790 * 1791 * Returns: zero on success or negative error code. 1792 */ 1793 int phylink_set_fixed_link(struct phylink *pl, 1794 const struct phylink_link_state *state) 1795 { 1796 const struct link_capabilities *c; 1797 unsigned long *adv; 1798 1799 if (pl->cfg_link_an_mode != MLO_AN_PHY || !state || 1800 !test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) 1801 return -EINVAL; 1802 1803 c = phy_caps_lookup(state->speed, state->duplex, 1804 pl->supported, true); 1805 if (!c) 1806 return -EINVAL; 1807 1808 adv = pl->link_config.advertising; 1809 linkmode_and(adv, pl->supported, c->linkmodes); 1810 linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, adv); 1811 1812 pl->link_config.speed = state->speed; 1813 pl->link_config.duplex = state->duplex; 1814 pl->link_config.link = 1; 1815 pl->link_config.an_complete = 1; 1816 1817 pl->cfg_link_an_mode = MLO_AN_FIXED; 1818 pl->req_link_an_mode = pl->cfg_link_an_mode; 1819 1820 return 0; 1821 } 1822 EXPORT_SYMBOL_GPL(phylink_set_fixed_link); 1823 1824 /** 1825 * phylink_create() - create a phylink instance 1826 * @config: a pointer to the target &struct phylink_config 1827 * @fwnode: a pointer to a &struct fwnode_handle describing the network 1828 * interface 1829 * @iface: the desired link mode defined by &typedef phy_interface_t 1830 * @mac_ops: a pointer to a &struct phylink_mac_ops for the MAC. 1831 * 1832 * Create a new phylink instance, and parse the link parameters found in @np. 1833 * This will parse in-band modes, fixed-link or SFP configuration. 1834 * 1835 * Note: the rtnl lock must not be held when calling this function. 1836 * 1837 * Returns a pointer to a &struct phylink, or an error-pointer value. Users 1838 * must use IS_ERR() to check for errors from this function. 1839 */ 1840 struct phylink *phylink_create(struct phylink_config *config, 1841 const struct fwnode_handle *fwnode, 1842 phy_interface_t iface, 1843 const struct phylink_mac_ops *mac_ops) 1844 { 1845 struct phylink *pl; 1846 int ret; 1847 1848 /* Validate the supplied configuration */ 1849 if (phy_interface_empty(config->supported_interfaces)) { 1850 dev_err(config->dev, 1851 "phylink: error: empty supported_interfaces\n"); 1852 return ERR_PTR(-EINVAL); 1853 } 1854 1855 pl = kzalloc(sizeof(*pl), GFP_KERNEL); 1856 if (!pl) 1857 return ERR_PTR(-ENOMEM); 1858 1859 mutex_init(&pl->phydev_mutex); 1860 mutex_init(&pl->state_mutex); 1861 INIT_WORK(&pl->resolve, phylink_resolve); 1862 1863 pl->config = config; 1864 if (config->type == PHYLINK_NETDEV) { 1865 pl->netdev = to_net_dev(config->dev); 1866 netif_carrier_off(pl->netdev); 1867 } else if (config->type == PHYLINK_DEV) { 1868 pl->dev = config->dev; 1869 } else { 1870 kfree(pl); 1871 return ERR_PTR(-EINVAL); 1872 } 1873 1874 pl->mac_supports_eee_ops = phylink_mac_implements_lpi(mac_ops); 1875 pl->mac_supports_eee = pl->mac_supports_eee_ops && 1876 pl->config->lpi_capabilities && 1877 !phy_interface_empty(pl->config->lpi_interfaces); 1878 1879 /* Set the default EEE configuration */ 1880 pl->eee_cfg.eee_enabled = pl->config->eee_enabled_default; 1881 pl->eee_cfg.tx_lpi_enabled = pl->eee_cfg.eee_enabled; 1882 pl->eee_cfg.tx_lpi_timer = pl->config->lpi_timer_default; 1883 1884 pl->phy_state.interface = iface; 1885 pl->link_interface = iface; 1886 if (iface == PHY_INTERFACE_MODE_MOCA) 1887 pl->link_port = PORT_BNC; 1888 else 1889 pl->link_port = PORT_MII; 1890 pl->link_config.interface = iface; 1891 pl->link_config.pause = MLO_PAUSE_AN; 1892 pl->link_config.speed = SPEED_UNKNOWN; 1893 pl->link_config.duplex = DUPLEX_UNKNOWN; 1894 pl->pcs_state = PCS_STATE_DOWN; 1895 pl->mac_ops = mac_ops; 1896 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 1897 timer_setup(&pl->link_poll, phylink_fixed_poll, 0); 1898 1899 linkmode_fill(pl->supported); 1900 linkmode_copy(pl->link_config.advertising, pl->supported); 1901 phylink_validate(pl, pl->supported, &pl->link_config); 1902 1903 ret = phylink_parse_mode(pl, fwnode); 1904 if (ret < 0) { 1905 kfree(pl); 1906 return ERR_PTR(ret); 1907 } 1908 1909 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 1910 ret = phylink_parse_fixedlink(pl, fwnode); 1911 if (ret < 0) { 1912 kfree(pl); 1913 return ERR_PTR(ret); 1914 } 1915 } 1916 1917 pl->req_link_an_mode = pl->cfg_link_an_mode; 1918 1919 ret = phylink_register_sfp(pl, fwnode); 1920 if (ret < 0) { 1921 kfree(pl); 1922 return ERR_PTR(ret); 1923 } 1924 1925 return pl; 1926 } 1927 EXPORT_SYMBOL_GPL(phylink_create); 1928 1929 /** 1930 * phylink_destroy() - cleanup and destroy the phylink instance 1931 * @pl: a pointer to a &struct phylink returned from phylink_create() 1932 * 1933 * Destroy a phylink instance. Any PHY that has been attached must have been 1934 * cleaned up via phylink_disconnect_phy() prior to calling this function. 1935 * 1936 * Note: the rtnl lock must not be held when calling this function. 1937 */ 1938 void phylink_destroy(struct phylink *pl) 1939 { 1940 sfp_bus_del_upstream(pl->sfp_bus); 1941 if (pl->link_gpio) 1942 gpiod_put(pl->link_gpio); 1943 1944 cancel_work_sync(&pl->resolve); 1945 kfree(pl); 1946 } 1947 EXPORT_SYMBOL_GPL(phylink_destroy); 1948 1949 /** 1950 * phylink_expects_phy() - Determine if phylink expects a phy to be attached 1951 * @pl: a pointer to a &struct phylink returned from phylink_create() 1952 * 1953 * When using fixed-link mode, or in-band mode with 1000base-X or 2500base-X, 1954 * no PHY is needed. 1955 * 1956 * Returns true if phylink will be expecting a PHY. 1957 */ 1958 bool phylink_expects_phy(struct phylink *pl) 1959 { 1960 if (pl->cfg_link_an_mode == MLO_AN_FIXED || 1961 (pl->cfg_link_an_mode == MLO_AN_INBAND && 1962 phy_interface_mode_is_8023z(pl->link_interface))) 1963 return false; 1964 return true; 1965 } 1966 EXPORT_SYMBOL_GPL(phylink_expects_phy); 1967 1968 static void phylink_phy_change(struct phy_device *phydev, bool up) 1969 { 1970 struct phylink *pl = phydev->phylink; 1971 bool tx_pause, rx_pause; 1972 1973 phy_get_pause(phydev, &tx_pause, &rx_pause); 1974 1975 mutex_lock(&pl->state_mutex); 1976 pl->phy_state.speed = phydev->speed; 1977 pl->phy_state.duplex = phydev->duplex; 1978 pl->phy_state.rate_matching = phydev->rate_matching; 1979 pl->phy_state.pause = MLO_PAUSE_NONE; 1980 if (tx_pause) 1981 pl->phy_state.pause |= MLO_PAUSE_TX; 1982 if (rx_pause) 1983 pl->phy_state.pause |= MLO_PAUSE_RX; 1984 pl->phy_state.interface = phydev->interface; 1985 pl->phy_state.link = up; 1986 if (!up) 1987 pl->link_failed = true; 1988 1989 /* Get the LPI state from phylib */ 1990 pl->phy_enable_tx_lpi = phydev->enable_tx_lpi; 1991 pl->mac_tx_lpi_timer = phydev->eee_cfg.tx_lpi_timer; 1992 mutex_unlock(&pl->state_mutex); 1993 1994 phylink_run_resolve(pl); 1995 1996 phylink_dbg(pl, "phy link %s %s/%s/%s/%s/%s/%slpi\n", 1997 up ? "up" : "down", 1998 phy_modes(phydev->interface), 1999 phy_speed_to_str(phydev->speed), 2000 phy_duplex_to_str(phydev->duplex), 2001 phy_rate_matching_to_str(phydev->rate_matching), 2002 phylink_pause_to_str(pl->phy_state.pause), 2003 phydev->enable_tx_lpi ? "" : "no"); 2004 } 2005 2006 static int phylink_validate_phy(struct phylink *pl, struct phy_device *phy, 2007 unsigned long *supported, 2008 struct phylink_link_state *state) 2009 { 2010 DECLARE_PHY_INTERFACE_MASK(interfaces); 2011 2012 /* If the PHY provides a bitmap of the interfaces it will be using 2013 * depending on the negotiated media speeds, use this to validate 2014 * which ethtool link modes can be used. 2015 */ 2016 if (!phy_interface_empty(phy->possible_interfaces)) { 2017 /* We only care about the union of the PHY's interfaces and 2018 * those which the host supports. 2019 */ 2020 phy_interface_and(interfaces, phy->possible_interfaces, 2021 pl->config->supported_interfaces); 2022 2023 if (phy_interface_empty(interfaces)) { 2024 phylink_err(pl, "PHY has no common interfaces\n"); 2025 return -EINVAL; 2026 } 2027 2028 if (phy_on_sfp(phy)) { 2029 /* If the PHY is on a SFP, limit the interfaces to 2030 * those that can be used with a SFP module. 2031 */ 2032 phy_interface_and(interfaces, interfaces, 2033 phylink_sfp_interfaces); 2034 2035 if (phy_interface_empty(interfaces)) { 2036 phylink_err(pl, "SFP PHY's possible interfaces becomes empty\n"); 2037 return -EINVAL; 2038 } 2039 } 2040 2041 phylink_dbg(pl, "PHY %s uses interfaces %*pbl, validating %*pbl\n", 2042 phydev_name(phy), 2043 (int)PHY_INTERFACE_MODE_MAX, 2044 phy->possible_interfaces, 2045 (int)PHY_INTERFACE_MODE_MAX, interfaces); 2046 2047 return phylink_validate_mask(pl, phy, supported, state, 2048 interfaces); 2049 } 2050 2051 phylink_dbg(pl, "PHY %s doesn't supply possible interfaces\n", 2052 phydev_name(phy)); 2053 2054 /* Check whether we would use rate matching for the proposed interface 2055 * mode. 2056 */ 2057 state->rate_matching = phy_get_rate_matching(phy, state->interface); 2058 2059 /* Clause 45 PHYs may switch their Serdes lane between, e.g. 10GBASE-R, 2060 * 5GBASE-R, 2500BASE-X and SGMII if they are not using rate matching. 2061 * For some interface modes (e.g. RXAUI, XAUI and USXGMII) switching 2062 * their Serdes is either unnecessary or not reasonable. 2063 * 2064 * For these which switch interface modes, we really need to know which 2065 * interface modes the PHY supports to properly work out which ethtool 2066 * linkmodes can be supported. For now, as a work-around, we validate 2067 * against all interface modes, which may lead to more ethtool link 2068 * modes being advertised than are actually supported. 2069 */ 2070 if (phy->is_c45 && state->rate_matching == RATE_MATCH_NONE && 2071 state->interface != PHY_INTERFACE_MODE_RXAUI && 2072 state->interface != PHY_INTERFACE_MODE_XAUI && 2073 state->interface != PHY_INTERFACE_MODE_USXGMII) 2074 state->interface = PHY_INTERFACE_MODE_NA; 2075 2076 return phylink_validate(pl, supported, state); 2077 } 2078 2079 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy, 2080 phy_interface_t interface) 2081 { 2082 struct phylink_link_state config; 2083 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 2084 char *irq_str; 2085 int ret; 2086 2087 /* 2088 * This is the new way of dealing with flow control for PHYs, 2089 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 2090 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 2091 * using our validate call to the MAC, we rely upon the MAC 2092 * clearing the bits from both supported and advertising fields. 2093 */ 2094 phy_support_asym_pause(phy); 2095 2096 memset(&config, 0, sizeof(config)); 2097 linkmode_copy(supported, phy->supported); 2098 linkmode_copy(config.advertising, phy->advertising); 2099 config.interface = interface; 2100 2101 ret = phylink_validate_phy(pl, phy, supported, &config); 2102 if (ret) { 2103 phylink_warn(pl, "validation of %s with support %*pb and advertisement %*pb failed: %pe\n", 2104 phy_modes(config.interface), 2105 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->supported, 2106 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising, 2107 ERR_PTR(ret)); 2108 return ret; 2109 } 2110 2111 phy->phylink = pl; 2112 phy->phy_link_change = phylink_phy_change; 2113 2114 irq_str = phy_attached_info_irq(phy); 2115 phylink_info(pl, 2116 "PHY [%s] driver [%s] (irq=%s)\n", 2117 dev_name(&phy->mdio.dev), phy->drv->name, irq_str); 2118 kfree(irq_str); 2119 2120 mutex_lock(&pl->phydev_mutex); 2121 mutex_lock(&phy->lock); 2122 mutex_lock(&pl->state_mutex); 2123 pl->phydev = phy; 2124 pl->phy_state.interface = interface; 2125 pl->phy_state.pause = MLO_PAUSE_NONE; 2126 pl->phy_state.speed = SPEED_UNKNOWN; 2127 pl->phy_state.duplex = DUPLEX_UNKNOWN; 2128 pl->phy_state.rate_matching = RATE_MATCH_NONE; 2129 linkmode_copy(pl->supported, supported); 2130 linkmode_copy(pl->link_config.advertising, config.advertising); 2131 2132 /* Restrict the phy advertisement according to the MAC support. */ 2133 linkmode_copy(phy->advertising, config.advertising); 2134 2135 /* If the MAC supports phylink managed EEE, restrict the EEE 2136 * advertisement according to the MAC's LPI capabilities. 2137 */ 2138 if (pl->mac_supports_eee) { 2139 /* If EEE is enabled, then we need to call phy_support_eee() 2140 * to ensure that the advertising mask is appropriately set. 2141 * This also enables EEE at the PHY. 2142 */ 2143 if (pl->eee_cfg.eee_enabled) 2144 phy_support_eee(phy); 2145 2146 phy->eee_cfg.tx_lpi_enabled = pl->eee_cfg.tx_lpi_enabled; 2147 phy->eee_cfg.tx_lpi_timer = pl->eee_cfg.tx_lpi_timer; 2148 2149 /* Convert the MAC's LPI capabilities to linkmodes */ 2150 linkmode_zero(pl->supported_lpi); 2151 phylink_caps_to_linkmodes(pl->supported_lpi, 2152 pl->config->lpi_capabilities); 2153 2154 /* Restrict the PHYs EEE support/advertisement to the modes 2155 * that the MAC supports. 2156 */ 2157 linkmode_and(phy->advertising_eee, phy->advertising_eee, 2158 pl->supported_lpi); 2159 } else if (pl->mac_supports_eee_ops) { 2160 /* MAC supports phylink EEE, but wants EEE always disabled. */ 2161 phy_disable_eee(phy); 2162 } 2163 2164 mutex_unlock(&pl->state_mutex); 2165 mutex_unlock(&phy->lock); 2166 mutex_unlock(&pl->phydev_mutex); 2167 2168 phylink_dbg(pl, 2169 "phy: %s setting supported %*pb advertising %*pb\n", 2170 phy_modes(interface), 2171 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported, 2172 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising); 2173 2174 if (pl->config->mac_managed_pm) 2175 phy->mac_managed_pm = true; 2176 2177 /* Allow the MAC to stop its clock if the PHY has the capability */ 2178 pl->mac_tx_clk_stop = phy_eee_tx_clock_stop_capable(phy) > 0; 2179 2180 if (pl->mac_supports_eee_ops) { 2181 /* Explicitly configure whether the PHY is allowed to stop it's 2182 * receive clock. 2183 */ 2184 ret = phy_eee_rx_clock_stop(phy, 2185 pl->config->eee_rx_clk_stop_enable); 2186 if (ret == -EOPNOTSUPP) 2187 ret = 0; 2188 } 2189 2190 if (ret == 0 && phy_interrupt_is_valid(phy)) 2191 phy_request_interrupt(phy); 2192 2193 return ret; 2194 } 2195 2196 static int phylink_attach_phy(struct phylink *pl, struct phy_device *phy, 2197 phy_interface_t interface) 2198 { 2199 u32 flags = 0; 2200 2201 if (WARN_ON(pl->cfg_link_an_mode == MLO_AN_FIXED || 2202 (pl->cfg_link_an_mode == MLO_AN_INBAND && 2203 phy_interface_mode_is_8023z(interface) && !pl->sfp_bus))) 2204 return -EINVAL; 2205 2206 if (pl->phydev) 2207 return -EBUSY; 2208 2209 if (pl->config->mac_requires_rxc) 2210 flags |= PHY_F_RXC_ALWAYS_ON; 2211 2212 return phy_attach_direct(pl->netdev, phy, flags, interface); 2213 } 2214 2215 /** 2216 * phylink_connect_phy() - connect a PHY to the phylink instance 2217 * @pl: a pointer to a &struct phylink returned from phylink_create() 2218 * @phy: a pointer to a &struct phy_device. 2219 * 2220 * Connect @phy to the phylink instance specified by @pl by calling 2221 * phy_attach_direct(). Configure the @phy according to the MAC driver's 2222 * capabilities, start the PHYLIB state machine and enable any interrupts 2223 * that the PHY supports. 2224 * 2225 * This updates the phylink's ethtool supported and advertising link mode 2226 * masks. 2227 * 2228 * Returns 0 on success or a negative errno. 2229 */ 2230 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy) 2231 { 2232 int ret; 2233 2234 /* Use PHY device/driver interface */ 2235 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 2236 pl->link_interface = phy->interface; 2237 pl->link_config.interface = pl->link_interface; 2238 } 2239 2240 ret = phylink_attach_phy(pl, phy, pl->link_interface); 2241 if (ret < 0) 2242 return ret; 2243 2244 ret = phylink_bringup_phy(pl, phy, pl->link_config.interface); 2245 if (ret) 2246 phy_detach(phy); 2247 2248 return ret; 2249 } 2250 EXPORT_SYMBOL_GPL(phylink_connect_phy); 2251 2252 /** 2253 * phylink_of_phy_connect() - connect the PHY specified in the DT mode. 2254 * @pl: a pointer to a &struct phylink returned from phylink_create() 2255 * @dn: a pointer to a &struct device_node. 2256 * @flags: PHY-specific flags to communicate to the PHY device driver 2257 * 2258 * Connect the phy specified in the device node @dn to the phylink instance 2259 * specified by @pl. Actions specified in phylink_connect_phy() will be 2260 * performed. 2261 * 2262 * Returns 0 on success or a negative errno. 2263 */ 2264 int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn, 2265 u32 flags) 2266 { 2267 return phylink_fwnode_phy_connect(pl, of_fwnode_handle(dn), flags); 2268 } 2269 EXPORT_SYMBOL_GPL(phylink_of_phy_connect); 2270 2271 /** 2272 * phylink_fwnode_phy_connect() - connect the PHY specified in the fwnode. 2273 * @pl: a pointer to a &struct phylink returned from phylink_create() 2274 * @fwnode: a pointer to a &struct fwnode_handle. 2275 * @flags: PHY-specific flags to communicate to the PHY device driver 2276 * 2277 * Connect the phy specified @fwnode to the phylink instance specified 2278 * by @pl. 2279 * 2280 * Returns 0 on success or a negative errno. 2281 */ 2282 int phylink_fwnode_phy_connect(struct phylink *pl, 2283 const struct fwnode_handle *fwnode, 2284 u32 flags) 2285 { 2286 struct fwnode_handle *phy_fwnode; 2287 struct phy_device *phy_dev; 2288 int ret; 2289 2290 /* Fixed links and 802.3z are handled without needing a PHY */ 2291 if (pl->cfg_link_an_mode == MLO_AN_FIXED || 2292 (pl->cfg_link_an_mode == MLO_AN_INBAND && 2293 phy_interface_mode_is_8023z(pl->link_interface))) 2294 return 0; 2295 2296 phy_fwnode = fwnode_get_phy_node(fwnode); 2297 if (IS_ERR(phy_fwnode)) { 2298 if (pl->cfg_link_an_mode == MLO_AN_PHY) 2299 return -ENODEV; 2300 return 0; 2301 } 2302 2303 phy_dev = fwnode_phy_find_device(phy_fwnode); 2304 /* We're done with the phy_node handle */ 2305 fwnode_handle_put(phy_fwnode); 2306 if (!phy_dev) 2307 return -ENODEV; 2308 2309 /* Use PHY device/driver interface */ 2310 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 2311 pl->link_interface = phy_dev->interface; 2312 pl->link_config.interface = pl->link_interface; 2313 } 2314 2315 if (pl->config->mac_requires_rxc) 2316 flags |= PHY_F_RXC_ALWAYS_ON; 2317 2318 ret = phy_attach_direct(pl->netdev, phy_dev, flags, 2319 pl->link_interface); 2320 phy_device_free(phy_dev); 2321 if (ret) 2322 return ret; 2323 2324 ret = phylink_bringup_phy(pl, phy_dev, pl->link_config.interface); 2325 if (ret) 2326 phy_detach(phy_dev); 2327 2328 return ret; 2329 } 2330 EXPORT_SYMBOL_GPL(phylink_fwnode_phy_connect); 2331 2332 /** 2333 * phylink_disconnect_phy() - disconnect any PHY attached to the phylink 2334 * instance. 2335 * @pl: a pointer to a &struct phylink returned from phylink_create() 2336 * 2337 * Disconnect any current PHY from the phylink instance described by @pl. 2338 */ 2339 void phylink_disconnect_phy(struct phylink *pl) 2340 { 2341 struct phy_device *phy; 2342 2343 ASSERT_RTNL(); 2344 2345 mutex_lock(&pl->phydev_mutex); 2346 phy = pl->phydev; 2347 if (phy) { 2348 mutex_lock(&phy->lock); 2349 mutex_lock(&pl->state_mutex); 2350 pl->phydev = NULL; 2351 pl->phy_enable_tx_lpi = false; 2352 pl->mac_tx_clk_stop = false; 2353 mutex_unlock(&pl->state_mutex); 2354 mutex_unlock(&phy->lock); 2355 } 2356 mutex_unlock(&pl->phydev_mutex); 2357 2358 if (phy) { 2359 flush_work(&pl->resolve); 2360 phy_disconnect(phy); 2361 } 2362 } 2363 EXPORT_SYMBOL_GPL(phylink_disconnect_phy); 2364 2365 static void phylink_link_changed(struct phylink *pl, bool up, const char *what) 2366 { 2367 if (!up) 2368 pl->link_failed = true; 2369 phylink_run_resolve(pl); 2370 phylink_dbg(pl, "%s link %s\n", what, up ? "up" : "down"); 2371 } 2372 2373 /** 2374 * phylink_mac_change() - notify phylink of a change in MAC state 2375 * @pl: a pointer to a &struct phylink returned from phylink_create() 2376 * @up: indicates whether the link is currently up. 2377 * 2378 * The MAC driver should call this driver when the state of its link 2379 * changes (eg, link failure, new negotiation results, etc.) 2380 */ 2381 void phylink_mac_change(struct phylink *pl, bool up) 2382 { 2383 phylink_link_changed(pl, up, "mac"); 2384 } 2385 EXPORT_SYMBOL_GPL(phylink_mac_change); 2386 2387 /** 2388 * phylink_pcs_change() - notify phylink of a change to PCS link state 2389 * @pcs: pointer to &struct phylink_pcs 2390 * @up: indicates whether the link is currently up. 2391 * 2392 * The PCS driver should call this when the state of its link changes 2393 * (e.g. link failure, new negotiation results, etc.) Note: it should 2394 * not determine "up" by reading the BMSR. If in doubt about the link 2395 * state at interrupt time, then pass true if pcs_get_state() returns 2396 * the latched link-down state, otherwise pass false. 2397 */ 2398 void phylink_pcs_change(struct phylink_pcs *pcs, bool up) 2399 { 2400 struct phylink *pl = pcs->phylink; 2401 2402 if (pl) 2403 phylink_link_changed(pl, up, "pcs"); 2404 } 2405 EXPORT_SYMBOL_GPL(phylink_pcs_change); 2406 2407 static irqreturn_t phylink_link_handler(int irq, void *data) 2408 { 2409 struct phylink *pl = data; 2410 2411 phylink_run_resolve(pl); 2412 2413 return IRQ_HANDLED; 2414 } 2415 2416 /** 2417 * phylink_start() - start a phylink instance 2418 * @pl: a pointer to a &struct phylink returned from phylink_create() 2419 * 2420 * Start the phylink instance specified by @pl, configuring the MAC for the 2421 * desired link mode(s) and negotiation style. This should be called from the 2422 * network device driver's &struct net_device_ops ndo_open() method. 2423 */ 2424 void phylink_start(struct phylink *pl) 2425 { 2426 bool poll = false; 2427 2428 ASSERT_RTNL(); 2429 2430 phylink_info(pl, "configuring for %s/%s link mode\n", 2431 phylink_an_mode_str(pl->req_link_an_mode), 2432 phy_modes(pl->link_config.interface)); 2433 2434 /* Always set the carrier off */ 2435 if (pl->netdev) 2436 netif_carrier_off(pl->netdev); 2437 2438 pl->pcs_state = PCS_STATE_STARTING; 2439 2440 /* Apply the link configuration to the MAC when starting. This allows 2441 * a fixed-link to start with the correct parameters, and also 2442 * ensures that we set the appropriate advertisement for Serdes links. 2443 * 2444 * Restart autonegotiation if using 802.3z to ensure that the link 2445 * parameters are properly negotiated. This is necessary for DSA 2446 * switches using 802.3z negotiation to ensure they see our modes. 2447 */ 2448 phylink_mac_initial_config(pl, true); 2449 2450 pl->pcs_state = PCS_STATE_STARTED; 2451 2452 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_STOPPED); 2453 2454 if (pl->cfg_link_an_mode == MLO_AN_FIXED && pl->link_gpio) { 2455 int irq = gpiod_to_irq(pl->link_gpio); 2456 2457 if (irq > 0) { 2458 if (!request_irq(irq, phylink_link_handler, 2459 IRQF_TRIGGER_RISING | 2460 IRQF_TRIGGER_FALLING, 2461 "netdev link", pl)) 2462 pl->link_irq = irq; 2463 else 2464 irq = 0; 2465 } 2466 if (irq <= 0) 2467 poll = true; 2468 } 2469 2470 if (pl->cfg_link_an_mode == MLO_AN_FIXED) 2471 poll |= pl->config->poll_fixed_state; 2472 2473 if (poll) 2474 mod_timer(&pl->link_poll, jiffies + HZ); 2475 if (pl->phydev) 2476 phy_start(pl->phydev); 2477 if (pl->sfp_bus) 2478 sfp_upstream_start(pl->sfp_bus); 2479 } 2480 EXPORT_SYMBOL_GPL(phylink_start); 2481 2482 /** 2483 * phylink_stop() - stop a phylink instance 2484 * @pl: a pointer to a &struct phylink returned from phylink_create() 2485 * 2486 * Stop the phylink instance specified by @pl. This should be called from the 2487 * network device driver's &struct net_device_ops ndo_stop() method. The 2488 * network device's carrier state should not be changed prior to calling this 2489 * function. 2490 * 2491 * This will synchronously bring down the link if the link is not already 2492 * down (in other words, it will trigger a mac_link_down() method call.) 2493 */ 2494 void phylink_stop(struct phylink *pl) 2495 { 2496 ASSERT_RTNL(); 2497 2498 if (pl->sfp_bus) 2499 sfp_upstream_stop(pl->sfp_bus); 2500 if (pl->phydev) 2501 phy_stop(pl->phydev); 2502 timer_delete_sync(&pl->link_poll); 2503 if (pl->link_irq) { 2504 free_irq(pl->link_irq, pl); 2505 pl->link_irq = 0; 2506 } 2507 2508 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED); 2509 2510 pl->pcs_state = PCS_STATE_DOWN; 2511 2512 phylink_pcs_disable(pl->pcs); 2513 } 2514 EXPORT_SYMBOL_GPL(phylink_stop); 2515 2516 /** 2517 * phylink_rx_clk_stop_block() - block PHY ability to stop receive clock in LPI 2518 * @pl: a pointer to a &struct phylink returned from phylink_create() 2519 * 2520 * Disable the PHY's ability to stop the receive clock while the receive path 2521 * is in EEE LPI state, until the number of calls to phylink_rx_clk_stop_block() 2522 * are balanced by calls to phylink_rx_clk_stop_unblock(). 2523 */ 2524 void phylink_rx_clk_stop_block(struct phylink *pl) 2525 { 2526 ASSERT_RTNL(); 2527 2528 if (pl->mac_rx_clk_stop_blocked == U8_MAX) { 2529 phylink_warn(pl, "%s called too many times - ignoring\n", 2530 __func__); 2531 dump_stack(); 2532 return; 2533 } 2534 2535 /* Disable PHY receive clock stop if this is the first time this 2536 * function has been called and clock-stop was previously enabled. 2537 */ 2538 if (pl->mac_rx_clk_stop_blocked++ == 0 && 2539 pl->mac_supports_eee_ops && pl->phydev && 2540 pl->config->eee_rx_clk_stop_enable) 2541 phy_eee_rx_clock_stop(pl->phydev, false); 2542 } 2543 EXPORT_SYMBOL_GPL(phylink_rx_clk_stop_block); 2544 2545 /** 2546 * phylink_rx_clk_stop_unblock() - unblock PHY ability to stop receive clock 2547 * @pl: a pointer to a &struct phylink returned from phylink_create() 2548 * 2549 * All calls to phylink_rx_clk_stop_block() must be balanced with a 2550 * corresponding call to phylink_rx_clk_stop_unblock() to restore the PHYs 2551 * ability to stop the receive clock when the receive path is in EEE LPI mode. 2552 */ 2553 void phylink_rx_clk_stop_unblock(struct phylink *pl) 2554 { 2555 ASSERT_RTNL(); 2556 2557 if (pl->mac_rx_clk_stop_blocked == 0) { 2558 phylink_warn(pl, "%s called too many times - ignoring\n", 2559 __func__); 2560 dump_stack(); 2561 return; 2562 } 2563 2564 /* Re-enable PHY receive clock stop if the number of unblocks matches 2565 * the number of calls to the block function above. 2566 */ 2567 if (--pl->mac_rx_clk_stop_blocked == 0 && 2568 pl->mac_supports_eee_ops && pl->phydev && 2569 pl->config->eee_rx_clk_stop_enable) 2570 phy_eee_rx_clock_stop(pl->phydev, true); 2571 } 2572 EXPORT_SYMBOL_GPL(phylink_rx_clk_stop_unblock); 2573 2574 static bool phylink_mac_supports_wol(struct phylink *pl) 2575 { 2576 return !!pl->mac_ops->mac_wol_set; 2577 } 2578 2579 static bool phylink_phy_supports_wol(struct phylink *pl, 2580 struct phy_device *phydev) 2581 { 2582 return phydev && (pl->config->wol_phy_legacy || phy_can_wakeup(phydev)); 2583 } 2584 2585 static bool phylink_phy_pm_speed_ctrl(struct phylink *pl) 2586 { 2587 return pl->config->wol_phy_speed_ctrl && !pl->wolopts_mac && 2588 pl->phydev && phy_may_wakeup(pl->phydev); 2589 } 2590 2591 /** 2592 * phylink_suspend() - handle a network device suspend event 2593 * @pl: a pointer to a &struct phylink returned from phylink_create() 2594 * @mac_wol: true if the MAC needs to receive packets for Wake-on-Lan 2595 * 2596 * Handle a network device suspend event. There are several cases: 2597 * 2598 * - If Wake-on-Lan is not active, we can bring down the link between 2599 * the MAC and PHY by calling phylink_stop(). 2600 * - If Wake-on-Lan is active, and being handled only by the PHY, we 2601 * can also bring down the link between the MAC and PHY. 2602 * - If Wake-on-Lan is active, but being handled by the MAC, the MAC 2603 * still needs to receive packets, so we can not bring the link down. 2604 * 2605 * Note: when phylink managed Wake-on-Lan is in use, @mac_wol is ignored. 2606 * (struct phylink_mac_ops.mac_set_wol populated.) 2607 */ 2608 void phylink_suspend(struct phylink *pl, bool mac_wol) 2609 { 2610 ASSERT_RTNL(); 2611 2612 if (phylink_mac_supports_wol(pl)) 2613 mac_wol = !!pl->wolopts_mac; 2614 2615 if (mac_wol && (!pl->netdev || pl->netdev->ethtool->wol_enabled)) { 2616 /* Wake-on-Lan enabled, MAC handling */ 2617 mutex_lock(&pl->state_mutex); 2618 2619 /* Stop the resolver bringing the link up */ 2620 __set_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state); 2621 2622 pl->suspend_link_up = phylink_link_is_up(pl); 2623 if (pl->suspend_link_up) { 2624 /* Disable the carrier, to prevent transmit timeouts, 2625 * but one would hope all packets have been sent. This 2626 * also means phylink_resolve() will do nothing. 2627 */ 2628 if (pl->netdev) 2629 netif_carrier_off(pl->netdev); 2630 pl->old_link_state = false; 2631 } 2632 2633 /* We do not call mac_link_down() here as we want the 2634 * link to remain up to receive the WoL packets. 2635 */ 2636 mutex_unlock(&pl->state_mutex); 2637 } else { 2638 phylink_stop(pl); 2639 } 2640 2641 if (phylink_phy_pm_speed_ctrl(pl)) 2642 phylink_speed_down(pl, false); 2643 } 2644 EXPORT_SYMBOL_GPL(phylink_suspend); 2645 2646 /** 2647 * phylink_prepare_resume() - prepare to resume a network device 2648 * @pl: a pointer to a &struct phylink returned from phylink_create() 2649 * 2650 * Optional, but if called must be called prior to phylink_resume(). 2651 * 2652 * Prepare to resume a network device, preparing the PHY as necessary. 2653 */ 2654 void phylink_prepare_resume(struct phylink *pl) 2655 { 2656 struct phy_device *phydev = pl->phydev; 2657 2658 ASSERT_RTNL(); 2659 2660 /* IEEE 802.3 22.2.4.1.5 allows PHYs to stop their receive clock 2661 * when PDOWN is set. However, some MACs require RXC to be running 2662 * in order to resume. If the MAC requires RXC, and we have a PHY, 2663 * then resume the PHY. Note that 802.3 allows PHYs 500ms before 2664 * the clock meets requirements. We do not implement this delay. 2665 */ 2666 if (pl->config->mac_requires_rxc && phydev && phydev->suspended) 2667 phy_resume(phydev); 2668 } 2669 EXPORT_SYMBOL_GPL(phylink_prepare_resume); 2670 2671 /** 2672 * phylink_resume() - handle a network device resume event 2673 * @pl: a pointer to a &struct phylink returned from phylink_create() 2674 * 2675 * Undo the effects of phylink_suspend(), returning the link to an 2676 * operational state. 2677 */ 2678 void phylink_resume(struct phylink *pl) 2679 { 2680 ASSERT_RTNL(); 2681 2682 if (phylink_phy_pm_speed_ctrl(pl)) 2683 phylink_speed_up(pl); 2684 2685 if (test_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state)) { 2686 /* Wake-on-Lan enabled, MAC handling */ 2687 2688 if (pl->suspend_link_up) { 2689 /* Call mac_link_down() so we keep the overall state 2690 * balanced. Do this under the state_mutex lock for 2691 * consistency. This will cause a "Link Down" message 2692 * to be printed during resume, which is harmless - 2693 * the true link state will be printed when we run a 2694 * resolve. 2695 */ 2696 mutex_lock(&pl->state_mutex); 2697 phylink_link_down(pl); 2698 mutex_unlock(&pl->state_mutex); 2699 } 2700 2701 /* Re-apply the link parameters so that all the settings get 2702 * restored to the MAC. 2703 */ 2704 phylink_mac_initial_config(pl, true); 2705 2706 /* Re-enable and re-resolve the link parameters */ 2707 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_MAC_WOL); 2708 } else { 2709 phylink_start(pl); 2710 } 2711 } 2712 EXPORT_SYMBOL_GPL(phylink_resume); 2713 2714 /** 2715 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY 2716 * @pl: a pointer to a &struct phylink returned from phylink_create() 2717 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters 2718 * 2719 * Read the wake on lan parameters from the PHY attached to the phylink 2720 * instance specified by @pl. If no PHY is currently attached, report no 2721 * support for wake on lan. 2722 */ 2723 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 2724 { 2725 ASSERT_RTNL(); 2726 2727 wol->supported = 0; 2728 wol->wolopts = 0; 2729 2730 if (phylink_mac_supports_wol(pl)) { 2731 if (phylink_phy_supports_wol(pl, pl->phydev)) 2732 phy_ethtool_get_wol(pl->phydev, wol); 2733 2734 /* Where the MAC augments the WoL support, merge its support and 2735 * current configuration. 2736 */ 2737 if (~wol->wolopts & pl->wolopts_mac & WAKE_MAGICSECURE) 2738 memcpy(wol->sopass, pl->wol_sopass, 2739 sizeof(wol->sopass)); 2740 2741 wol->supported |= pl->config->wol_mac_support; 2742 wol->wolopts |= pl->wolopts_mac; 2743 } else { 2744 /* Legacy */ 2745 if (pl->phydev) 2746 phy_ethtool_get_wol(pl->phydev, wol); 2747 } 2748 } 2749 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol); 2750 2751 /** 2752 * phylink_ethtool_set_wol() - set wake on lan parameters 2753 * @pl: a pointer to a &struct phylink returned from phylink_create() 2754 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters 2755 * 2756 * Set the wake on lan parameters for the PHY attached to the phylink 2757 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP 2758 * error. 2759 * 2760 * Returns zero on success or negative errno code. 2761 */ 2762 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 2763 { 2764 struct ethtool_wolinfo w = { .cmd = ETHTOOL_GWOL }; 2765 int ret = -EOPNOTSUPP; 2766 bool changed; 2767 u32 wolopts; 2768 2769 ASSERT_RTNL(); 2770 2771 if (phylink_mac_supports_wol(pl)) { 2772 wolopts = wol->wolopts; 2773 2774 if (phylink_phy_supports_wol(pl, pl->phydev)) { 2775 ret = phy_ethtool_set_wol(pl->phydev, wol); 2776 if (ret != 0 && ret != -EOPNOTSUPP) 2777 return ret; 2778 2779 phy_ethtool_get_wol(pl->phydev, &w); 2780 2781 /* Any Wake-on-Lan modes which the PHY is handling 2782 * should not be passed on to the MAC. 2783 */ 2784 wolopts &= ~w.wolopts; 2785 } 2786 2787 wolopts &= pl->config->wol_mac_support; 2788 changed = pl->wolopts_mac != wolopts; 2789 if (wolopts & WAKE_MAGICSECURE) 2790 changed |= !!memcmp(wol->sopass, pl->wol_sopass, 2791 sizeof(wol->sopass)); 2792 memcpy(pl->wol_sopass, wol->sopass, sizeof(pl->wol_sopass)); 2793 2794 if (changed) { 2795 ret = pl->mac_ops->mac_wol_set(pl->config, wolopts, 2796 wol->sopass); 2797 if (!ret) 2798 pl->wolopts_mac = wolopts; 2799 } else { 2800 ret = 0; 2801 } 2802 } else { 2803 if (pl->phydev) 2804 ret = phy_ethtool_set_wol(pl->phydev, wol); 2805 } 2806 2807 return ret; 2808 } 2809 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol); 2810 2811 static phy_interface_t phylink_sfp_select_interface(struct phylink *pl, 2812 const unsigned long *link_modes) 2813 { 2814 phy_interface_t interface; 2815 2816 interface = sfp_select_interface(pl->sfp_bus, link_modes); 2817 if (interface == PHY_INTERFACE_MODE_NA) { 2818 phylink_err(pl, 2819 "selection of interface failed, advertisement %*pb\n", 2820 __ETHTOOL_LINK_MODE_MASK_NBITS, 2821 link_modes); 2822 return interface; 2823 } 2824 2825 if (!test_bit(interface, pl->config->supported_interfaces)) { 2826 phylink_err(pl, 2827 "selection of interface failed, SFP selected %s (%u) but MAC supports %*pbl\n", 2828 phy_modes(interface), interface, 2829 (int)PHY_INTERFACE_MODE_MAX, 2830 pl->config->supported_interfaces); 2831 return PHY_INTERFACE_MODE_NA; 2832 } 2833 2834 return interface; 2835 } 2836 2837 static phy_interface_t phylink_sfp_select_interface_speed(struct phylink *pl, 2838 u32 speed) 2839 { 2840 phy_interface_t best_interface = PHY_INTERFACE_MODE_NA; 2841 phy_interface_t interface; 2842 u32 max_speed; 2843 int i; 2844 2845 for (i = 0; i < ARRAY_SIZE(phylink_sfp_interface_preference); i++) { 2846 interface = phylink_sfp_interface_preference[i]; 2847 if (!test_bit(interface, pl->sfp_interfaces)) 2848 continue; 2849 2850 max_speed = phylink_interface_max_speed(interface); 2851 2852 /* The logic here is: if speed == max_speed, then we've found 2853 * the best interface. Otherwise we find the interface that 2854 * can just support the requested speed. 2855 */ 2856 if (max_speed >= speed) 2857 best_interface = interface; 2858 2859 if (max_speed <= speed) 2860 break; 2861 } 2862 2863 if (best_interface == PHY_INTERFACE_MODE_NA) 2864 phylink_err(pl, "selection of interface failed, speed %u\n", 2865 speed); 2866 2867 return best_interface; 2868 } 2869 2870 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b) 2871 { 2872 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask); 2873 2874 linkmode_zero(mask); 2875 phylink_set_port_modes(mask); 2876 2877 linkmode_and(dst, dst, mask); 2878 linkmode_or(dst, dst, b); 2879 } 2880 2881 static void phylink_get_ksettings(const struct phylink_link_state *state, 2882 struct ethtool_link_ksettings *kset) 2883 { 2884 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising); 2885 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising); 2886 if (kset->base.rate_matching == RATE_MATCH_NONE) { 2887 kset->base.speed = state->speed; 2888 kset->base.duplex = state->duplex; 2889 } 2890 kset->base.autoneg = linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2891 state->advertising) ? 2892 AUTONEG_ENABLE : AUTONEG_DISABLE; 2893 } 2894 2895 /** 2896 * phylink_ethtool_ksettings_get() - get the current link settings 2897 * @pl: a pointer to a &struct phylink returned from phylink_create() 2898 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings 2899 * 2900 * Read the current link settings for the phylink instance specified by @pl. 2901 * This will be the link settings read from the MAC, PHY or fixed link 2902 * settings depending on the current negotiation mode. 2903 */ 2904 int phylink_ethtool_ksettings_get(struct phylink *pl, 2905 struct ethtool_link_ksettings *kset) 2906 { 2907 struct phylink_link_state link_state; 2908 2909 ASSERT_RTNL(); 2910 2911 if (pl->phydev) 2912 phy_ethtool_ksettings_get(pl->phydev, kset); 2913 else 2914 kset->base.port = pl->link_port; 2915 2916 linkmode_copy(kset->link_modes.supported, pl->supported); 2917 2918 switch (pl->act_link_an_mode) { 2919 case MLO_AN_FIXED: 2920 /* We are using fixed settings. Report these as the 2921 * current link settings - and note that these also 2922 * represent the supported speeds/duplex/pause modes. 2923 */ 2924 phylink_get_fixed_state(pl, &link_state); 2925 phylink_get_ksettings(&link_state, kset); 2926 break; 2927 2928 case MLO_AN_INBAND: 2929 /* If there is a phy attached, then use the reported 2930 * settings from the phy with no modification. 2931 */ 2932 if (pl->phydev) 2933 break; 2934 2935 phylink_mac_pcs_get_state(pl, &link_state); 2936 2937 /* The MAC is reporting the link results from its own PCS 2938 * layer via in-band status. Report these as the current 2939 * link settings. 2940 */ 2941 phylink_get_ksettings(&link_state, kset); 2942 break; 2943 } 2944 2945 return 0; 2946 } 2947 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get); 2948 2949 static bool phylink_validate_pcs_inband_autoneg(struct phylink *pl, 2950 phy_interface_t interface, 2951 unsigned long *adv) 2952 { 2953 unsigned int inband = phylink_inband_caps(pl, interface); 2954 unsigned int mask; 2955 2956 /* If the PCS doesn't implement inband support, be permissive. */ 2957 if (!inband) 2958 return true; 2959 2960 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, adv)) 2961 mask = LINK_INBAND_ENABLE; 2962 else 2963 mask = LINK_INBAND_DISABLE; 2964 2965 /* Check whether the PCS implements the required mode */ 2966 return !!(inband & mask); 2967 } 2968 2969 /** 2970 * phylink_ethtool_ksettings_set() - set the link settings 2971 * @pl: a pointer to a &struct phylink returned from phylink_create() 2972 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes 2973 */ 2974 int phylink_ethtool_ksettings_set(struct phylink *pl, 2975 const struct ethtool_link_ksettings *kset) 2976 { 2977 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 2978 const struct link_capabilities *c; 2979 struct phylink_link_state config; 2980 2981 ASSERT_RTNL(); 2982 2983 if (pl->phydev) { 2984 struct ethtool_link_ksettings phy_kset = *kset; 2985 2986 linkmode_and(phy_kset.link_modes.advertising, 2987 phy_kset.link_modes.advertising, 2988 pl->supported); 2989 2990 /* We can rely on phylib for this update; we also do not need 2991 * to update the pl->link_config settings: 2992 * - the configuration returned via ksettings_get() will come 2993 * from phylib whenever a PHY is present. 2994 * - link_config.interface will be updated by the PHY calling 2995 * back via phylink_phy_change() and a subsequent resolve. 2996 * - initial link configuration for PHY mode comes from the 2997 * last phy state updated via phylink_phy_change(). 2998 * - other configuration changes (e.g. pause modes) are 2999 * performed directly via phylib. 3000 * - if in in-band mode with a PHY, the link configuration 3001 * is passed on the link from the PHY, and all of 3002 * link_config.{speed,duplex,an_enabled,pause} are not used. 3003 * - the only possible use would be link_config.advertising 3004 * pause modes when in 1000base-X mode with a PHY, but in 3005 * the presence of a PHY, this should not be changed as that 3006 * should be determined from the media side advertisement. 3007 */ 3008 return phy_ethtool_ksettings_set(pl->phydev, &phy_kset); 3009 } 3010 3011 config = pl->link_config; 3012 /* Mask out unsupported advertisements */ 3013 linkmode_and(config.advertising, kset->link_modes.advertising, 3014 pl->supported); 3015 3016 /* FIXME: should we reject autoneg if phy/mac does not support it? */ 3017 switch (kset->base.autoneg) { 3018 case AUTONEG_DISABLE: 3019 /* Autonegotiation disabled, select a suitable speed and 3020 * duplex. 3021 */ 3022 c = phy_caps_lookup(kset->base.speed, kset->base.duplex, 3023 pl->supported, false); 3024 if (!c) 3025 return -EINVAL; 3026 3027 /* If we have a fixed link, refuse to change link parameters. 3028 * If the link parameters match, accept them but do nothing. 3029 */ 3030 if (pl->req_link_an_mode == MLO_AN_FIXED) { 3031 if (c->speed != pl->link_config.speed || 3032 c->duplex != pl->link_config.duplex) 3033 return -EINVAL; 3034 return 0; 3035 } 3036 3037 config.speed = c->speed; 3038 config.duplex = c->duplex; 3039 break; 3040 3041 case AUTONEG_ENABLE: 3042 /* If we have a fixed link, allow autonegotiation (since that 3043 * is our default case) but do not allow the advertisement to 3044 * be changed. If the advertisement matches, simply return. 3045 */ 3046 if (pl->req_link_an_mode == MLO_AN_FIXED) { 3047 if (!linkmode_equal(config.advertising, 3048 pl->link_config.advertising)) 3049 return -EINVAL; 3050 return 0; 3051 } 3052 3053 config.speed = SPEED_UNKNOWN; 3054 config.duplex = DUPLEX_UNKNOWN; 3055 break; 3056 3057 default: 3058 return -EINVAL; 3059 } 3060 3061 /* We have ruled out the case with a PHY attached, and the 3062 * fixed-link cases. All that is left are in-band links. 3063 */ 3064 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising, 3065 kset->base.autoneg == AUTONEG_ENABLE); 3066 3067 /* If this link is with an SFP, ensure that changes to advertised modes 3068 * also cause the associated interface to be selected such that the 3069 * link can be configured correctly. 3070 */ 3071 if (pl->sfp_bus) { 3072 if (kset->base.autoneg == AUTONEG_ENABLE) 3073 config.interface = 3074 phylink_sfp_select_interface(pl, 3075 config.advertising); 3076 else 3077 config.interface = 3078 phylink_sfp_select_interface_speed(pl, 3079 config.speed); 3080 if (config.interface == PHY_INTERFACE_MODE_NA) 3081 return -EINVAL; 3082 3083 /* Revalidate with the selected interface */ 3084 linkmode_copy(support, pl->supported); 3085 if (phylink_validate(pl, support, &config)) { 3086 phylink_err(pl, "validation of %s/%s with support %*pb failed\n", 3087 phylink_an_mode_str(pl->req_link_an_mode), 3088 phy_modes(config.interface), 3089 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 3090 return -EINVAL; 3091 } 3092 } else { 3093 /* Validate without changing the current supported mask. */ 3094 linkmode_copy(support, pl->supported); 3095 if (phylink_validate(pl, support, &config)) 3096 return -EINVAL; 3097 } 3098 3099 /* If autonegotiation is enabled, we must have an advertisement */ 3100 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 3101 config.advertising) && 3102 phylink_is_empty_linkmode(config.advertising)) 3103 return -EINVAL; 3104 3105 /* Validate the autonegotiation state. We don't have a PHY in this 3106 * situation, so the PCS is the media-facing entity. 3107 */ 3108 if (!phylink_validate_pcs_inband_autoneg(pl, config.interface, 3109 config.advertising)) 3110 return -EINVAL; 3111 3112 mutex_lock(&pl->state_mutex); 3113 pl->link_config.speed = config.speed; 3114 pl->link_config.duplex = config.duplex; 3115 3116 if (pl->link_config.interface != config.interface) { 3117 /* The interface changed, e.g. 1000base-X <-> 2500base-X */ 3118 /* We need to force the link down, then change the interface */ 3119 if (pl->old_link_state) { 3120 phylink_link_down(pl); 3121 pl->old_link_state = false; 3122 } 3123 if (!test_bit(PHYLINK_DISABLE_STOPPED, 3124 &pl->phylink_disable_state)) 3125 phylink_major_config(pl, false, &config); 3126 pl->link_config.interface = config.interface; 3127 linkmode_copy(pl->link_config.advertising, config.advertising); 3128 } else if (!linkmode_equal(pl->link_config.advertising, 3129 config.advertising)) { 3130 linkmode_copy(pl->link_config.advertising, config.advertising); 3131 phylink_change_inband_advert(pl); 3132 } 3133 mutex_unlock(&pl->state_mutex); 3134 3135 return 0; 3136 } 3137 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set); 3138 3139 /** 3140 * phylink_ethtool_nway_reset() - restart negotiation 3141 * @pl: a pointer to a &struct phylink returned from phylink_create() 3142 * 3143 * Restart negotiation for the phylink instance specified by @pl. This will 3144 * cause any attached phy to restart negotiation with the link partner, and 3145 * if the MAC is in a BaseX mode, the MAC will also be requested to restart 3146 * negotiation. 3147 * 3148 * Returns zero on success, or negative error code. 3149 */ 3150 int phylink_ethtool_nway_reset(struct phylink *pl) 3151 { 3152 int ret = 0; 3153 3154 ASSERT_RTNL(); 3155 3156 if (pl->phydev) 3157 ret = phy_restart_aneg(pl->phydev); 3158 phylink_pcs_an_restart(pl); 3159 3160 return ret; 3161 } 3162 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset); 3163 3164 /** 3165 * phylink_ethtool_get_pauseparam() - get the current pause parameters 3166 * @pl: a pointer to a &struct phylink returned from phylink_create() 3167 * @pause: a pointer to a &struct ethtool_pauseparam 3168 */ 3169 void phylink_ethtool_get_pauseparam(struct phylink *pl, 3170 struct ethtool_pauseparam *pause) 3171 { 3172 ASSERT_RTNL(); 3173 3174 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN); 3175 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX); 3176 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX); 3177 } 3178 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam); 3179 3180 /** 3181 * phylink_ethtool_set_pauseparam() - set the current pause parameters 3182 * @pl: a pointer to a &struct phylink returned from phylink_create() 3183 * @pause: a pointer to a &struct ethtool_pauseparam 3184 */ 3185 int phylink_ethtool_set_pauseparam(struct phylink *pl, 3186 struct ethtool_pauseparam *pause) 3187 { 3188 struct phylink_link_state *config = &pl->link_config; 3189 bool manual_changed; 3190 int pause_state; 3191 3192 ASSERT_RTNL(); 3193 3194 if (pl->req_link_an_mode == MLO_AN_FIXED) 3195 return -EOPNOTSUPP; 3196 3197 if (!phylink_test(pl->supported, Pause) && 3198 !phylink_test(pl->supported, Asym_Pause)) 3199 return -EOPNOTSUPP; 3200 3201 if (!phylink_test(pl->supported, Asym_Pause) && 3202 pause->rx_pause != pause->tx_pause) 3203 return -EINVAL; 3204 3205 pause_state = 0; 3206 if (pause->autoneg) 3207 pause_state |= MLO_PAUSE_AN; 3208 if (pause->rx_pause) 3209 pause_state |= MLO_PAUSE_RX; 3210 if (pause->tx_pause) 3211 pause_state |= MLO_PAUSE_TX; 3212 3213 mutex_lock(&pl->state_mutex); 3214 /* 3215 * See the comments for linkmode_set_pause(), wrt the deficiencies 3216 * with the current implementation. A solution to this issue would 3217 * be: 3218 * ethtool Local device 3219 * rx tx Pause AsymDir 3220 * 0 0 0 0 3221 * 1 0 1 1 3222 * 0 1 0 1 3223 * 1 1 1 1 3224 * and then use the ethtool rx/tx enablement status to mask the 3225 * rx/tx pause resolution. 3226 */ 3227 linkmode_set_pause(config->advertising, pause->tx_pause, 3228 pause->rx_pause); 3229 3230 manual_changed = (config->pause ^ pause_state) & MLO_PAUSE_AN || 3231 (!(pause_state & MLO_PAUSE_AN) && 3232 (config->pause ^ pause_state) & MLO_PAUSE_TXRX_MASK); 3233 3234 config->pause = pause_state; 3235 3236 /* Update our in-band advertisement, triggering a renegotiation if 3237 * the advertisement changed. 3238 */ 3239 if (!pl->phydev) 3240 phylink_change_inband_advert(pl); 3241 3242 mutex_unlock(&pl->state_mutex); 3243 3244 /* If we have a PHY, a change of the pause frame advertisement will 3245 * cause phylib to renegotiate (if AN is enabled) which will in turn 3246 * call our phylink_phy_change() and trigger a resolve. Note that 3247 * we can't hold our state mutex while calling phy_set_asym_pause(). 3248 */ 3249 if (pl->phydev) 3250 phy_set_asym_pause(pl->phydev, pause->rx_pause, 3251 pause->tx_pause); 3252 3253 /* If the manual pause settings changed, make sure we trigger a 3254 * resolve to update their state; we can not guarantee that the 3255 * link will cycle. 3256 */ 3257 if (manual_changed) { 3258 pl->link_failed = true; 3259 phylink_run_resolve(pl); 3260 } 3261 3262 return 0; 3263 } 3264 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam); 3265 3266 /** 3267 * phylink_get_eee_err() - read the energy efficient ethernet error 3268 * counter 3269 * @pl: a pointer to a &struct phylink returned from phylink_create(). 3270 * 3271 * Read the Energy Efficient Ethernet error counter from the PHY associated 3272 * with the phylink instance specified by @pl. 3273 * 3274 * Returns positive error counter value, or negative error code. 3275 */ 3276 int phylink_get_eee_err(struct phylink *pl) 3277 { 3278 int ret = 0; 3279 3280 ASSERT_RTNL(); 3281 3282 if (pl->phydev) 3283 ret = phy_get_eee_err(pl->phydev); 3284 3285 return ret; 3286 } 3287 EXPORT_SYMBOL_GPL(phylink_get_eee_err); 3288 3289 /** 3290 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters 3291 * @pl: a pointer to a &struct phylink returned from phylink_create() 3292 * @eee: a pointer to a &struct ethtool_keee for the read parameters 3293 */ 3294 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_keee *eee) 3295 { 3296 int ret = -EOPNOTSUPP; 3297 3298 ASSERT_RTNL(); 3299 3300 if (pl->mac_supports_eee_ops && !pl->mac_supports_eee) 3301 return ret; 3302 3303 if (pl->phydev) { 3304 ret = phy_ethtool_get_eee(pl->phydev, eee); 3305 /* Restrict supported linkmode mask */ 3306 if (ret == 0 && pl->mac_supports_eee_ops) 3307 linkmode_and(eee->supported, eee->supported, 3308 pl->supported_lpi); 3309 } 3310 3311 return ret; 3312 } 3313 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee); 3314 3315 /** 3316 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters 3317 * @pl: a pointer to a &struct phylink returned from phylink_create() 3318 * @eee: a pointer to a &struct ethtool_keee for the desired parameters 3319 */ 3320 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_keee *eee) 3321 { 3322 bool mac_eee = pl->mac_supports_eee; 3323 int ret = -EOPNOTSUPP; 3324 3325 ASSERT_RTNL(); 3326 3327 phylink_dbg(pl, "mac %s phylink EEE%s, adv %*pbl, LPI%s timer %uus\n", 3328 mac_eee ? "supports" : "does not support", 3329 eee->eee_enabled ? ", enabled" : "", 3330 __ETHTOOL_LINK_MODE_MASK_NBITS, eee->advertised, 3331 eee->tx_lpi_enabled ? " enabled" : "", eee->tx_lpi_timer); 3332 3333 if (pl->mac_supports_eee_ops && !mac_eee) 3334 return ret; 3335 3336 if (pl->phydev) { 3337 /* Restrict advertisement mask */ 3338 if (pl->mac_supports_eee_ops) 3339 linkmode_and(eee->advertised, eee->advertised, 3340 pl->supported_lpi); 3341 ret = phy_ethtool_set_eee(pl->phydev, eee); 3342 if (ret == 0) 3343 eee_to_eeecfg(&pl->eee_cfg, eee); 3344 } 3345 3346 return ret; 3347 } 3348 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee); 3349 3350 /* This emulates MII registers for a fixed-mode phy operating as per the 3351 * passed in state. "aneg" defines if we report negotiation is possible. 3352 * 3353 * FIXME: should deal with negotiation state too. 3354 */ 3355 static int phylink_mii_emul_read(unsigned int reg, 3356 struct phylink_link_state *state) 3357 { 3358 struct fixed_phy_status fs; 3359 unsigned long *lpa = state->lp_advertising; 3360 int val; 3361 3362 fs.link = state->link; 3363 fs.speed = state->speed; 3364 fs.duplex = state->duplex; 3365 fs.pause = test_bit(ETHTOOL_LINK_MODE_Pause_BIT, lpa); 3366 fs.asym_pause = test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, lpa); 3367 3368 val = swphy_read_reg(reg, &fs); 3369 if (reg == MII_BMSR) { 3370 if (!state->an_complete) 3371 val &= ~BMSR_ANEGCOMPLETE; 3372 } 3373 return val; 3374 } 3375 3376 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id, 3377 unsigned int reg) 3378 { 3379 struct phy_device *phydev = pl->phydev; 3380 int prtad, devad; 3381 3382 if (mdio_phy_id_is_c45(phy_id)) { 3383 prtad = mdio_phy_id_prtad(phy_id); 3384 devad = mdio_phy_id_devad(phy_id); 3385 return mdiobus_c45_read(pl->phydev->mdio.bus, prtad, devad, 3386 reg); 3387 } 3388 3389 if (phydev->is_c45) { 3390 switch (reg) { 3391 case MII_BMCR: 3392 case MII_BMSR: 3393 case MII_PHYSID1: 3394 case MII_PHYSID2: 3395 devad = __ffs(phydev->c45_ids.mmds_present); 3396 break; 3397 case MII_ADVERTISE: 3398 case MII_LPA: 3399 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 3400 return -EINVAL; 3401 devad = MDIO_MMD_AN; 3402 if (reg == MII_ADVERTISE) 3403 reg = MDIO_AN_ADVERTISE; 3404 else 3405 reg = MDIO_AN_LPA; 3406 break; 3407 default: 3408 return -EINVAL; 3409 } 3410 prtad = phy_id; 3411 return mdiobus_c45_read(pl->phydev->mdio.bus, prtad, devad, 3412 reg); 3413 } 3414 3415 return mdiobus_read(pl->phydev->mdio.bus, phy_id, reg); 3416 } 3417 3418 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id, 3419 unsigned int reg, unsigned int val) 3420 { 3421 struct phy_device *phydev = pl->phydev; 3422 int prtad, devad; 3423 3424 if (mdio_phy_id_is_c45(phy_id)) { 3425 prtad = mdio_phy_id_prtad(phy_id); 3426 devad = mdio_phy_id_devad(phy_id); 3427 return mdiobus_c45_write(pl->phydev->mdio.bus, prtad, devad, 3428 reg, val); 3429 } 3430 3431 if (phydev->is_c45) { 3432 switch (reg) { 3433 case MII_BMCR: 3434 case MII_BMSR: 3435 case MII_PHYSID1: 3436 case MII_PHYSID2: 3437 devad = __ffs(phydev->c45_ids.mmds_present); 3438 break; 3439 case MII_ADVERTISE: 3440 case MII_LPA: 3441 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 3442 return -EINVAL; 3443 devad = MDIO_MMD_AN; 3444 if (reg == MII_ADVERTISE) 3445 reg = MDIO_AN_ADVERTISE; 3446 else 3447 reg = MDIO_AN_LPA; 3448 break; 3449 default: 3450 return -EINVAL; 3451 } 3452 return mdiobus_c45_write(pl->phydev->mdio.bus, phy_id, devad, 3453 reg, val); 3454 } 3455 3456 return mdiobus_write(phydev->mdio.bus, phy_id, reg, val); 3457 } 3458 3459 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id, 3460 unsigned int reg) 3461 { 3462 struct phylink_link_state state; 3463 int val = 0xffff; 3464 3465 switch (pl->act_link_an_mode) { 3466 case MLO_AN_FIXED: 3467 if (phy_id == 0) { 3468 phylink_get_fixed_state(pl, &state); 3469 val = phylink_mii_emul_read(reg, &state); 3470 } 3471 break; 3472 3473 case MLO_AN_PHY: 3474 return -EOPNOTSUPP; 3475 3476 case MLO_AN_INBAND: 3477 if (phy_id == 0) { 3478 phylink_mac_pcs_get_state(pl, &state); 3479 val = phylink_mii_emul_read(reg, &state); 3480 } 3481 break; 3482 } 3483 3484 return val & 0xffff; 3485 } 3486 3487 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id, 3488 unsigned int reg, unsigned int val) 3489 { 3490 switch (pl->act_link_an_mode) { 3491 case MLO_AN_FIXED: 3492 break; 3493 3494 case MLO_AN_PHY: 3495 return -EOPNOTSUPP; 3496 3497 case MLO_AN_INBAND: 3498 break; 3499 } 3500 3501 return 0; 3502 } 3503 3504 /** 3505 * phylink_mii_ioctl() - generic mii ioctl interface 3506 * @pl: a pointer to a &struct phylink returned from phylink_create() 3507 * @ifr: a pointer to a &struct ifreq for socket ioctls 3508 * @cmd: ioctl cmd to execute 3509 * 3510 * Perform the specified MII ioctl on the PHY attached to the phylink instance 3511 * specified by @pl. If no PHY is attached, emulate the presence of the PHY. 3512 * 3513 * Returns: zero on success or negative error code. 3514 * 3515 * %SIOCGMIIPHY: 3516 * read register from the current PHY. 3517 * %SIOCGMIIREG: 3518 * read register from the specified PHY. 3519 * %SIOCSMIIREG: 3520 * set a register on the specified PHY. 3521 */ 3522 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd) 3523 { 3524 struct mii_ioctl_data *mii = if_mii(ifr); 3525 int ret; 3526 3527 ASSERT_RTNL(); 3528 3529 if (pl->phydev) { 3530 /* PHYs only exist for MLO_AN_PHY and SGMII */ 3531 switch (cmd) { 3532 case SIOCGMIIPHY: 3533 mii->phy_id = pl->phydev->mdio.addr; 3534 fallthrough; 3535 3536 case SIOCGMIIREG: 3537 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num); 3538 if (ret >= 0) { 3539 mii->val_out = ret; 3540 ret = 0; 3541 } 3542 break; 3543 3544 case SIOCSMIIREG: 3545 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num, 3546 mii->val_in); 3547 break; 3548 3549 default: 3550 ret = phy_mii_ioctl(pl->phydev, ifr, cmd); 3551 break; 3552 } 3553 } else { 3554 switch (cmd) { 3555 case SIOCGMIIPHY: 3556 mii->phy_id = 0; 3557 fallthrough; 3558 3559 case SIOCGMIIREG: 3560 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num); 3561 if (ret >= 0) { 3562 mii->val_out = ret; 3563 ret = 0; 3564 } 3565 break; 3566 3567 case SIOCSMIIREG: 3568 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num, 3569 mii->val_in); 3570 break; 3571 3572 default: 3573 ret = -EOPNOTSUPP; 3574 break; 3575 } 3576 } 3577 3578 return ret; 3579 } 3580 EXPORT_SYMBOL_GPL(phylink_mii_ioctl); 3581 3582 /** 3583 * phylink_speed_down() - set the non-SFP PHY to lowest speed supported by both 3584 * link partners 3585 * @pl: a pointer to a &struct phylink returned from phylink_create() 3586 * @sync: perform action synchronously 3587 * 3588 * If we have a PHY that is not part of a SFP module, then set the speed 3589 * as described in the phy_speed_down() function. Please see this function 3590 * for a description of the @sync parameter. 3591 * 3592 * Returns zero if there is no PHY, otherwise as per phy_speed_down(). 3593 */ 3594 int phylink_speed_down(struct phylink *pl, bool sync) 3595 { 3596 int ret = 0; 3597 3598 ASSERT_RTNL(); 3599 3600 if (!pl->sfp_bus && pl->phydev) 3601 ret = phy_speed_down(pl->phydev, sync); 3602 3603 return ret; 3604 } 3605 EXPORT_SYMBOL_GPL(phylink_speed_down); 3606 3607 /** 3608 * phylink_speed_up() - restore the advertised speeds prior to the call to 3609 * phylink_speed_down() 3610 * @pl: a pointer to a &struct phylink returned from phylink_create() 3611 * 3612 * If we have a PHY that is not part of a SFP module, then restore the 3613 * PHY speeds as per phy_speed_up(). 3614 * 3615 * Returns zero if there is no PHY, otherwise as per phy_speed_up(). 3616 */ 3617 int phylink_speed_up(struct phylink *pl) 3618 { 3619 int ret = 0; 3620 3621 ASSERT_RTNL(); 3622 3623 if (!pl->sfp_bus && pl->phydev) 3624 ret = phy_speed_up(pl->phydev); 3625 3626 return ret; 3627 } 3628 EXPORT_SYMBOL_GPL(phylink_speed_up); 3629 3630 static void phylink_sfp_attach(void *upstream, struct sfp_bus *bus) 3631 { 3632 struct phylink *pl = upstream; 3633 3634 pl->netdev->sfp_bus = bus; 3635 } 3636 3637 static void phylink_sfp_detach(void *upstream, struct sfp_bus *bus) 3638 { 3639 struct phylink *pl = upstream; 3640 3641 pl->netdev->sfp_bus = NULL; 3642 } 3643 3644 static phy_interface_t phylink_choose_sfp_interface(struct phylink *pl, 3645 const unsigned long *intf) 3646 { 3647 phy_interface_t interface; 3648 size_t i; 3649 3650 interface = PHY_INTERFACE_MODE_NA; 3651 for (i = 0; i < ARRAY_SIZE(phylink_sfp_interface_preference); i++) 3652 if (test_bit(phylink_sfp_interface_preference[i], intf)) { 3653 interface = phylink_sfp_interface_preference[i]; 3654 break; 3655 } 3656 3657 return interface; 3658 } 3659 3660 static void phylink_sfp_set_config(struct phylink *pl, unsigned long *supported, 3661 struct phylink_link_state *state, 3662 bool changed) 3663 { 3664 u8 mode = MLO_AN_INBAND; 3665 3666 phylink_dbg(pl, "requesting link mode %s/%s with support %*pb\n", 3667 phylink_an_mode_str(mode), phy_modes(state->interface), 3668 __ETHTOOL_LINK_MODE_MASK_NBITS, supported); 3669 3670 if (!linkmode_equal(pl->supported, supported)) { 3671 linkmode_copy(pl->supported, supported); 3672 changed = true; 3673 } 3674 3675 if (!linkmode_equal(pl->link_config.advertising, state->advertising)) { 3676 linkmode_copy(pl->link_config.advertising, state->advertising); 3677 changed = true; 3678 } 3679 3680 if (pl->req_link_an_mode != mode || 3681 pl->link_config.interface != state->interface) { 3682 pl->req_link_an_mode = mode; 3683 pl->link_config.interface = state->interface; 3684 3685 changed = true; 3686 3687 phylink_info(pl, "switched to %s/%s link mode\n", 3688 phylink_an_mode_str(mode), 3689 phy_modes(state->interface)); 3690 } 3691 3692 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED, 3693 &pl->phylink_disable_state)) 3694 phylink_mac_initial_config(pl, false); 3695 } 3696 3697 static int phylink_sfp_config_phy(struct phylink *pl, struct phy_device *phy) 3698 { 3699 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 3700 struct phylink_link_state config; 3701 int ret; 3702 3703 /* We're not using pl->sfp_interfaces, so clear it. */ 3704 phy_interface_zero(pl->sfp_interfaces); 3705 linkmode_copy(support, phy->supported); 3706 3707 memset(&config, 0, sizeof(config)); 3708 linkmode_copy(config.advertising, phy->advertising); 3709 config.interface = PHY_INTERFACE_MODE_NA; 3710 config.speed = SPEED_UNKNOWN; 3711 config.duplex = DUPLEX_UNKNOWN; 3712 config.pause = MLO_PAUSE_AN; 3713 3714 /* Ignore errors if we're expecting a PHY to attach later */ 3715 ret = phylink_validate(pl, support, &config); 3716 if (ret) { 3717 phylink_err(pl, "validation with support %*pb failed: %pe\n", 3718 __ETHTOOL_LINK_MODE_MASK_NBITS, support, 3719 ERR_PTR(ret)); 3720 return ret; 3721 } 3722 3723 config.interface = phylink_sfp_select_interface(pl, config.advertising); 3724 if (config.interface == PHY_INTERFACE_MODE_NA) 3725 return -EINVAL; 3726 3727 /* Attach the PHY so that the PHY is present when we do the major 3728 * configuration step. 3729 */ 3730 ret = phylink_attach_phy(pl, phy, config.interface); 3731 if (ret < 0) 3732 return ret; 3733 3734 /* This will validate the configuration for us. */ 3735 ret = phylink_bringup_phy(pl, phy, config.interface); 3736 if (ret < 0) { 3737 phy_detach(phy); 3738 return ret; 3739 } 3740 3741 pl->link_port = pl->sfp_port; 3742 3743 phylink_sfp_set_config(pl, support, &config, true); 3744 3745 return 0; 3746 } 3747 3748 static int phylink_sfp_config_optical(struct phylink *pl) 3749 { 3750 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 3751 struct phylink_link_state config; 3752 enum inband_type inband_type; 3753 phy_interface_t interface; 3754 int ret; 3755 3756 phylink_dbg(pl, "optical SFP: interfaces=[mac=%*pbl, sfp=%*pbl]\n", 3757 (int)PHY_INTERFACE_MODE_MAX, 3758 pl->config->supported_interfaces, 3759 (int)PHY_INTERFACE_MODE_MAX, 3760 pl->sfp_interfaces); 3761 3762 /* Find the union of the supported interfaces by the PCS/MAC and 3763 * the SFP module. 3764 */ 3765 phy_interface_and(pl->sfp_interfaces, pl->config->supported_interfaces, 3766 pl->sfp_interfaces); 3767 if (phy_interface_empty(pl->sfp_interfaces)) { 3768 phylink_err(pl, "unsupported SFP module: no common interface modes\n"); 3769 return -EINVAL; 3770 } 3771 3772 memset(&config, 0, sizeof(config)); 3773 linkmode_copy(support, pl->sfp_support); 3774 linkmode_copy(config.advertising, pl->sfp_support); 3775 config.speed = SPEED_UNKNOWN; 3776 config.duplex = DUPLEX_UNKNOWN; 3777 config.pause = MLO_PAUSE_AN; 3778 3779 /* For all the interfaces that are supported, reduce the sfp_support 3780 * mask to only those link modes that can be supported. 3781 */ 3782 ret = phylink_validate_mask(pl, NULL, pl->sfp_support, &config, 3783 pl->sfp_interfaces); 3784 if (ret) { 3785 phylink_err(pl, "unsupported SFP module: validation with support %*pb failed\n", 3786 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 3787 return ret; 3788 } 3789 3790 interface = phylink_choose_sfp_interface(pl, pl->sfp_interfaces); 3791 if (interface == PHY_INTERFACE_MODE_NA) { 3792 phylink_err(pl, "failed to select SFP interface\n"); 3793 return -EINVAL; 3794 } 3795 3796 phylink_dbg(pl, "optical SFP: chosen %s interface\n", 3797 phy_modes(interface)); 3798 3799 inband_type = phylink_get_inband_type(interface); 3800 if (inband_type == INBAND_NONE) { 3801 /* If this is the sole interface, and there is no inband 3802 * support, clear the advertising mask and Autoneg bit in 3803 * the support mask. Otherwise, just clear the Autoneg bit 3804 * in the advertising mask. 3805 */ 3806 if (phy_interface_weight(pl->sfp_interfaces) == 1) { 3807 linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 3808 pl->sfp_support); 3809 linkmode_zero(config.advertising); 3810 } else { 3811 linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 3812 config.advertising); 3813 } 3814 } 3815 3816 if (!phylink_validate_pcs_inband_autoneg(pl, interface, 3817 config.advertising)) { 3818 phylink_err(pl, "autoneg setting not compatible with PCS"); 3819 return -EINVAL; 3820 } 3821 3822 config.interface = interface; 3823 3824 /* Ignore errors if we're expecting a PHY to attach later */ 3825 ret = phylink_validate(pl, support, &config); 3826 if (ret) { 3827 phylink_err(pl, "validation with support %*pb failed: %pe\n", 3828 __ETHTOOL_LINK_MODE_MASK_NBITS, support, 3829 ERR_PTR(ret)); 3830 return ret; 3831 } 3832 3833 pl->link_port = pl->sfp_port; 3834 3835 phylink_sfp_set_config(pl, pl->sfp_support, &config, false); 3836 3837 return 0; 3838 } 3839 3840 static int phylink_sfp_module_insert(void *upstream, 3841 const struct sfp_eeprom_id *id) 3842 { 3843 const struct sfp_module_caps *caps; 3844 struct phylink *pl = upstream; 3845 3846 ASSERT_RTNL(); 3847 3848 caps = sfp_get_module_caps(pl->sfp_bus); 3849 phy_interface_copy(pl->sfp_interfaces, caps->interfaces); 3850 linkmode_copy(pl->sfp_support, caps->link_modes); 3851 pl->sfp_may_have_phy = caps->may_have_phy; 3852 pl->sfp_port = caps->port; 3853 3854 /* If this module may have a PHY connecting later, defer until later */ 3855 if (pl->sfp_may_have_phy) 3856 return 0; 3857 3858 return phylink_sfp_config_optical(pl); 3859 } 3860 3861 static void phylink_sfp_module_remove(void *upstream) 3862 { 3863 struct phylink *pl = upstream; 3864 3865 phy_interface_zero(pl->sfp_interfaces); 3866 } 3867 3868 static int phylink_sfp_module_start(void *upstream) 3869 { 3870 struct phylink *pl = upstream; 3871 3872 /* If this SFP module has a PHY, start the PHY now. */ 3873 if (pl->phydev) { 3874 phy_start(pl->phydev); 3875 return 0; 3876 } 3877 3878 /* If the module may have a PHY but we didn't detect one we 3879 * need to configure the MAC here. 3880 */ 3881 if (!pl->sfp_may_have_phy) 3882 return 0; 3883 3884 return phylink_sfp_config_optical(pl); 3885 } 3886 3887 static void phylink_sfp_module_stop(void *upstream) 3888 { 3889 struct phylink *pl = upstream; 3890 3891 /* If this SFP module has a PHY, stop it. */ 3892 if (pl->phydev) 3893 phy_stop(pl->phydev); 3894 } 3895 3896 static void phylink_sfp_link_down(void *upstream) 3897 { 3898 struct phylink *pl = upstream; 3899 3900 ASSERT_RTNL(); 3901 3902 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_LINK); 3903 } 3904 3905 static void phylink_sfp_link_up(void *upstream) 3906 { 3907 struct phylink *pl = upstream; 3908 3909 ASSERT_RTNL(); 3910 3911 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_LINK); 3912 } 3913 3914 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy) 3915 { 3916 struct phylink *pl = upstream; 3917 3918 if (!phy->drv) { 3919 phylink_err(pl, "PHY %s (id 0x%.8lx) has no driver loaded\n", 3920 phydev_name(phy), (unsigned long)phy->phy_id); 3921 phylink_err(pl, "Drivers which handle known common cases: CONFIG_BCM84881_PHY, CONFIG_MARVELL_PHY\n"); 3922 return -EINVAL; 3923 } 3924 3925 /* 3926 * This is the new way of dealing with flow control for PHYs, 3927 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 3928 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 3929 * using our validate call to the MAC, we rely upon the MAC 3930 * clearing the bits from both supported and advertising fields. 3931 */ 3932 phy_support_asym_pause(phy); 3933 3934 /* Set the PHY's host supported interfaces */ 3935 phy_interface_and(phy->host_interfaces, phylink_sfp_interfaces, 3936 pl->config->supported_interfaces); 3937 3938 /* Do the initial configuration */ 3939 return phylink_sfp_config_phy(pl, phy); 3940 } 3941 3942 static void phylink_sfp_disconnect_phy(void *upstream, 3943 struct phy_device *phydev) 3944 { 3945 phylink_disconnect_phy(upstream); 3946 } 3947 3948 static const struct sfp_upstream_ops sfp_phylink_ops = { 3949 .attach = phylink_sfp_attach, 3950 .detach = phylink_sfp_detach, 3951 .module_insert = phylink_sfp_module_insert, 3952 .module_remove = phylink_sfp_module_remove, 3953 .module_start = phylink_sfp_module_start, 3954 .module_stop = phylink_sfp_module_stop, 3955 .link_up = phylink_sfp_link_up, 3956 .link_down = phylink_sfp_link_down, 3957 .connect_phy = phylink_sfp_connect_phy, 3958 .disconnect_phy = phylink_sfp_disconnect_phy, 3959 }; 3960 3961 /* Helpers for MAC drivers */ 3962 3963 static struct { 3964 int bit; 3965 int speed; 3966 } phylink_c73_priority_resolution[] = { 3967 { ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT, SPEED_100000 }, 3968 { ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT, SPEED_100000 }, 3969 /* 100GBASE-KP4 and 100GBASE-CR10 not supported */ 3970 { ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT, SPEED_40000 }, 3971 { ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT, SPEED_40000 }, 3972 { ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, SPEED_10000 }, 3973 { ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, SPEED_10000 }, 3974 /* 5GBASE-KR not supported */ 3975 { ETHTOOL_LINK_MODE_2500baseX_Full_BIT, SPEED_2500 }, 3976 { ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, SPEED_1000 }, 3977 }; 3978 3979 void phylink_resolve_c73(struct phylink_link_state *state) 3980 { 3981 int i; 3982 3983 for (i = 0; i < ARRAY_SIZE(phylink_c73_priority_resolution); i++) { 3984 int bit = phylink_c73_priority_resolution[i].bit; 3985 if (linkmode_test_bit(bit, state->advertising) && 3986 linkmode_test_bit(bit, state->lp_advertising)) 3987 break; 3988 } 3989 3990 if (i < ARRAY_SIZE(phylink_c73_priority_resolution)) { 3991 state->speed = phylink_c73_priority_resolution[i].speed; 3992 state->duplex = DUPLEX_FULL; 3993 } else { 3994 /* negotiation failure */ 3995 state->link = false; 3996 } 3997 3998 phylink_resolve_an_pause(state); 3999 } 4000 EXPORT_SYMBOL_GPL(phylink_resolve_c73); 4001 4002 static void phylink_decode_c37_word(struct phylink_link_state *state, 4003 uint16_t config_reg, int speed) 4004 { 4005 int fd_bit; 4006 4007 if (speed == SPEED_2500) 4008 fd_bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT; 4009 else 4010 fd_bit = ETHTOOL_LINK_MODE_1000baseX_Full_BIT; 4011 4012 mii_lpa_mod_linkmode_x(state->lp_advertising, config_reg, fd_bit); 4013 4014 if (linkmode_test_bit(fd_bit, state->advertising) && 4015 linkmode_test_bit(fd_bit, state->lp_advertising)) { 4016 state->speed = speed; 4017 state->duplex = DUPLEX_FULL; 4018 } else { 4019 /* negotiation failure */ 4020 state->link = false; 4021 } 4022 4023 phylink_resolve_an_pause(state); 4024 } 4025 4026 static void phylink_decode_sgmii_word(struct phylink_link_state *state, 4027 uint16_t config_reg) 4028 { 4029 if (!(config_reg & LPA_SGMII_LINK)) { 4030 state->link = false; 4031 return; 4032 } 4033 4034 switch (config_reg & LPA_SGMII_SPD_MASK) { 4035 case LPA_SGMII_10: 4036 state->speed = SPEED_10; 4037 break; 4038 case LPA_SGMII_100: 4039 state->speed = SPEED_100; 4040 break; 4041 case LPA_SGMII_1000: 4042 state->speed = SPEED_1000; 4043 break; 4044 default: 4045 state->link = false; 4046 return; 4047 } 4048 if (config_reg & LPA_SGMII_FULL_DUPLEX) 4049 state->duplex = DUPLEX_FULL; 4050 else 4051 state->duplex = DUPLEX_HALF; 4052 } 4053 4054 /** 4055 * phylink_decode_usxgmii_word() - decode the USXGMII word from a MAC PCS 4056 * @state: a pointer to a struct phylink_link_state. 4057 * @lpa: a 16 bit value which stores the USXGMII auto-negotiation word 4058 * 4059 * Helper for MAC PCS supporting the USXGMII protocol and the auto-negotiation 4060 * code word. Decode the USXGMII code word and populate the corresponding fields 4061 * (speed, duplex) into the phylink_link_state structure. 4062 */ 4063 void phylink_decode_usxgmii_word(struct phylink_link_state *state, 4064 uint16_t lpa) 4065 { 4066 switch (lpa & MDIO_USXGMII_SPD_MASK) { 4067 case MDIO_USXGMII_10: 4068 state->speed = SPEED_10; 4069 break; 4070 case MDIO_USXGMII_100: 4071 state->speed = SPEED_100; 4072 break; 4073 case MDIO_USXGMII_1000: 4074 state->speed = SPEED_1000; 4075 break; 4076 case MDIO_USXGMII_2500: 4077 state->speed = SPEED_2500; 4078 break; 4079 case MDIO_USXGMII_5000: 4080 state->speed = SPEED_5000; 4081 break; 4082 case MDIO_USXGMII_10G: 4083 state->speed = SPEED_10000; 4084 break; 4085 default: 4086 state->link = false; 4087 return; 4088 } 4089 4090 if (lpa & MDIO_USXGMII_FULL_DUPLEX) 4091 state->duplex = DUPLEX_FULL; 4092 else 4093 state->duplex = DUPLEX_HALF; 4094 } 4095 EXPORT_SYMBOL_GPL(phylink_decode_usxgmii_word); 4096 4097 /** 4098 * phylink_decode_usgmii_word() - decode the USGMII word from a MAC PCS 4099 * @state: a pointer to a struct phylink_link_state. 4100 * @lpa: a 16 bit value which stores the USGMII auto-negotiation word 4101 * 4102 * Helper for MAC PCS supporting the USGMII protocol and the auto-negotiation 4103 * code word. Decode the USGMII code word and populate the corresponding fields 4104 * (speed, duplex) into the phylink_link_state structure. The structure for this 4105 * word is the same as the USXGMII word, except it only supports speeds up to 4106 * 1Gbps. 4107 */ 4108 static void phylink_decode_usgmii_word(struct phylink_link_state *state, 4109 uint16_t lpa) 4110 { 4111 switch (lpa & MDIO_USXGMII_SPD_MASK) { 4112 case MDIO_USXGMII_10: 4113 state->speed = SPEED_10; 4114 break; 4115 case MDIO_USXGMII_100: 4116 state->speed = SPEED_100; 4117 break; 4118 case MDIO_USXGMII_1000: 4119 state->speed = SPEED_1000; 4120 break; 4121 default: 4122 state->link = false; 4123 return; 4124 } 4125 4126 if (lpa & MDIO_USXGMII_FULL_DUPLEX) 4127 state->duplex = DUPLEX_FULL; 4128 else 4129 state->duplex = DUPLEX_HALF; 4130 } 4131 4132 /** 4133 * phylink_mii_c22_pcs_decode_state() - Decode MAC PCS state from MII registers 4134 * @state: a pointer to a &struct phylink_link_state. 4135 * @neg_mode: link negotiation mode (PHYLINK_PCS_NEG_xxx) 4136 * @bmsr: The value of the %MII_BMSR register 4137 * @lpa: The value of the %MII_LPA register 4138 * 4139 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 4140 * clause 37 negotiation and/or SGMII control. 4141 * 4142 * Parse the Clause 37 or Cisco SGMII link partner negotiation word into 4143 * the phylink @state structure. This is suitable to be used for implementing 4144 * the pcs_get_state() member of the struct phylink_pcs_ops structure if 4145 * accessing @bmsr and @lpa cannot be done with MDIO directly. 4146 */ 4147 void phylink_mii_c22_pcs_decode_state(struct phylink_link_state *state, 4148 unsigned int neg_mode, u16 bmsr, u16 lpa) 4149 { 4150 state->link = !!(bmsr & BMSR_LSTATUS); 4151 state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE); 4152 4153 /* If the link is down, the advertisement data is undefined. */ 4154 if (!state->link) 4155 return; 4156 4157 switch (state->interface) { 4158 case PHY_INTERFACE_MODE_1000BASEX: 4159 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) { 4160 phylink_decode_c37_word(state, lpa, SPEED_1000); 4161 } else { 4162 state->speed = SPEED_1000; 4163 state->duplex = DUPLEX_FULL; 4164 state->pause |= MLO_PAUSE_TX | MLO_PAUSE_RX; 4165 } 4166 break; 4167 4168 case PHY_INTERFACE_MODE_2500BASEX: 4169 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) { 4170 phylink_decode_c37_word(state, lpa, SPEED_2500); 4171 } else { 4172 state->speed = SPEED_2500; 4173 state->duplex = DUPLEX_FULL; 4174 state->pause |= MLO_PAUSE_TX | MLO_PAUSE_RX; 4175 } 4176 break; 4177 4178 case PHY_INTERFACE_MODE_SGMII: 4179 case PHY_INTERFACE_MODE_QSGMII: 4180 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) 4181 phylink_decode_sgmii_word(state, lpa); 4182 break; 4183 4184 case PHY_INTERFACE_MODE_QUSGMII: 4185 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) 4186 phylink_decode_usgmii_word(state, lpa); 4187 break; 4188 4189 default: 4190 state->link = false; 4191 break; 4192 } 4193 } 4194 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_decode_state); 4195 4196 /** 4197 * phylink_mii_c22_pcs_get_state() - read the MAC PCS state 4198 * @pcs: a pointer to a &struct mdio_device. 4199 * @neg_mode: link negotiation mode (PHYLINK_PCS_NEG_xxx) 4200 * @state: a pointer to a &struct phylink_link_state. 4201 * 4202 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 4203 * clause 37 negotiation and/or SGMII control. 4204 * 4205 * Read the MAC PCS state from the MII device configured in @config and 4206 * parse the Clause 37 or Cisco SGMII link partner negotiation word into 4207 * the phylink @state structure. This is suitable to be directly plugged 4208 * into the pcs_get_state() member of the struct phylink_pcs_ops 4209 * structure. 4210 */ 4211 void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs, 4212 unsigned int neg_mode, 4213 struct phylink_link_state *state) 4214 { 4215 int bmsr, lpa; 4216 4217 bmsr = mdiodev_read(pcs, MII_BMSR); 4218 lpa = mdiodev_read(pcs, MII_LPA); 4219 if (bmsr < 0 || lpa < 0) { 4220 state->link = false; 4221 return; 4222 } 4223 4224 phylink_mii_c22_pcs_decode_state(state, neg_mode, bmsr, lpa); 4225 } 4226 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_get_state); 4227 4228 /** 4229 * phylink_mii_c22_pcs_encode_advertisement() - configure the clause 37 PCS 4230 * advertisement 4231 * @interface: the PHY interface mode being configured 4232 * @advertising: the ethtool advertisement mask 4233 * 4234 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 4235 * clause 37 negotiation and/or SGMII control. 4236 * 4237 * Encode the clause 37 PCS advertisement as specified by @interface and 4238 * @advertising. 4239 * 4240 * Return: The new value for @adv, or ``-EINVAL`` if it should not be changed. 4241 */ 4242 int phylink_mii_c22_pcs_encode_advertisement(phy_interface_t interface, 4243 const unsigned long *advertising) 4244 { 4245 u16 adv; 4246 4247 switch (interface) { 4248 case PHY_INTERFACE_MODE_1000BASEX: 4249 case PHY_INTERFACE_MODE_2500BASEX: 4250 adv = ADVERTISE_1000XFULL; 4251 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 4252 advertising)) 4253 adv |= ADVERTISE_1000XPAUSE; 4254 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 4255 advertising)) 4256 adv |= ADVERTISE_1000XPSE_ASYM; 4257 return adv; 4258 case PHY_INTERFACE_MODE_SGMII: 4259 case PHY_INTERFACE_MODE_QSGMII: 4260 return 0x0001; 4261 default: 4262 /* Nothing to do for other modes */ 4263 return -EINVAL; 4264 } 4265 } 4266 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_encode_advertisement); 4267 4268 /** 4269 * phylink_mii_c22_pcs_config() - configure clause 22 PCS 4270 * @pcs: a pointer to a &struct mdio_device. 4271 * @interface: the PHY interface mode being configured 4272 * @advertising: the ethtool advertisement mask 4273 * @neg_mode: PCS negotiation mode 4274 * 4275 * Configure a Clause 22 PCS PHY with the appropriate negotiation 4276 * parameters for the @mode, @interface and @advertising parameters. 4277 * Returns negative error number on failure, zero if the advertisement 4278 * has not changed, or positive if there is a change. 4279 */ 4280 int phylink_mii_c22_pcs_config(struct mdio_device *pcs, 4281 phy_interface_t interface, 4282 const unsigned long *advertising, 4283 unsigned int neg_mode) 4284 { 4285 bool changed = 0; 4286 u16 bmcr; 4287 int ret, adv; 4288 4289 adv = phylink_mii_c22_pcs_encode_advertisement(interface, advertising); 4290 if (adv >= 0) { 4291 ret = mdiobus_modify_changed(pcs->bus, pcs->addr, 4292 MII_ADVERTISE, 0xffff, adv); 4293 if (ret < 0) 4294 return ret; 4295 changed = ret; 4296 } 4297 4298 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) 4299 bmcr = BMCR_ANENABLE; 4300 else 4301 bmcr = 0; 4302 4303 /* Configure the inband state. Ensure ISOLATE bit is disabled */ 4304 ret = mdiodev_modify(pcs, MII_BMCR, BMCR_ANENABLE | BMCR_ISOLATE, bmcr); 4305 if (ret < 0) 4306 return ret; 4307 4308 return changed; 4309 } 4310 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config); 4311 4312 /** 4313 * phylink_mii_c22_pcs_an_restart() - restart 802.3z autonegotiation 4314 * @pcs: a pointer to a &struct mdio_device. 4315 * 4316 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 4317 * clause 37 negotiation. 4318 * 4319 * Restart the clause 37 negotiation with the link partner. This is 4320 * suitable to be directly plugged into the pcs_get_state() member 4321 * of the struct phylink_pcs_ops structure. 4322 */ 4323 void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs) 4324 { 4325 int val = mdiodev_read(pcs, MII_BMCR); 4326 4327 if (val >= 0) { 4328 val |= BMCR_ANRESTART; 4329 4330 mdiodev_write(pcs, MII_BMCR, val); 4331 } 4332 } 4333 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_an_restart); 4334 4335 void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs, 4336 struct phylink_link_state *state) 4337 { 4338 struct mii_bus *bus = pcs->bus; 4339 int addr = pcs->addr; 4340 int stat; 4341 4342 stat = mdiobus_c45_read(bus, addr, MDIO_MMD_PCS, MDIO_STAT1); 4343 if (stat < 0) { 4344 state->link = false; 4345 return; 4346 } 4347 4348 state->link = !!(stat & MDIO_STAT1_LSTATUS); 4349 if (!state->link) 4350 return; 4351 4352 switch (state->interface) { 4353 case PHY_INTERFACE_MODE_10GBASER: 4354 state->speed = SPEED_10000; 4355 state->duplex = DUPLEX_FULL; 4356 break; 4357 4358 default: 4359 break; 4360 } 4361 } 4362 EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state); 4363 4364 /** 4365 * phylink_replay_link_begin() - begin replay of link callbacks for driver 4366 * which loses state 4367 * @pl: a pointer to a &struct phylink returned from phylink_create() 4368 * 4369 * Helper for MAC drivers which may perform a destructive reset at runtime. 4370 * Both the own driver's mac_link_down() method is called, as well as the 4371 * pcs_link_down() method of the split PCS (if any). 4372 * 4373 * This is similar to phylink_stop(), except it does not alter the state of 4374 * the phylib PHY (it is assumed that it is not affected by the MAC destructive 4375 * reset). 4376 */ 4377 void phylink_replay_link_begin(struct phylink *pl) 4378 { 4379 ASSERT_RTNL(); 4380 4381 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_REPLAY); 4382 } 4383 EXPORT_SYMBOL_GPL(phylink_replay_link_begin); 4384 4385 /** 4386 * phylink_replay_link_end() - end replay of link callbacks for driver 4387 * which lost state 4388 * @pl: a pointer to a &struct phylink returned from phylink_create() 4389 * 4390 * Helper for MAC drivers which may perform a destructive reset at runtime. 4391 * Both the own driver's mac_config() and mac_link_up() methods, as well as the 4392 * pcs_config() and pcs_link_up() method of the split PCS (if any), are called. 4393 * 4394 * This is similar to phylink_start(), except it does not alter the state of 4395 * the phylib PHY. 4396 * 4397 * One must call this method only within the same rtnl_lock() critical section 4398 * as a previous phylink_replay_link_start(). 4399 */ 4400 void phylink_replay_link_end(struct phylink *pl) 4401 { 4402 ASSERT_RTNL(); 4403 4404 if (WARN(!test_bit(PHYLINK_DISABLE_REPLAY, 4405 &pl->phylink_disable_state), 4406 "phylink_replay_link_end() called without a prior phylink_replay_link_begin()\n")) 4407 return; 4408 4409 pl->force_major_config = true; 4410 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_REPLAY); 4411 flush_work(&pl->resolve); 4412 } 4413 EXPORT_SYMBOL_GPL(phylink_replay_link_end); 4414 4415 static int __init phylink_init(void) 4416 { 4417 for (int i = 0; i < ARRAY_SIZE(phylink_sfp_interface_preference); ++i) 4418 __set_bit(phylink_sfp_interface_preference[i], 4419 phylink_sfp_interfaces); 4420 4421 return 0; 4422 } 4423 4424 module_init(phylink_init); 4425 4426 MODULE_LICENSE("GPL v2"); 4427 MODULE_DESCRIPTION("phylink models the MAC to optional PHY connection"); 4428