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 if (pcs) 1297 pcs->phylink = pl; 1298 1299 pl->pcs = pcs; 1300 } 1301 1302 if (pl->pcs) 1303 phylink_pcs_pre_config(pl->pcs, state->interface); 1304 1305 phylink_mac_config(pl, state); 1306 1307 if (pl->pcs) { 1308 err = phylink_pcs_post_config(pl->pcs, state->interface); 1309 if (err < 0) { 1310 phylink_err(pl, "pcs_post_config failed: %pe\n", 1311 ERR_PTR(err)); 1312 1313 pl->major_config_failed = true; 1314 } 1315 } 1316 1317 if (pl->pcs_state == PCS_STATE_STARTING || pcs_changed) 1318 phylink_pcs_enable(pl->pcs); 1319 1320 err = phylink_pcs_config(pl->pcs, pl->pcs_neg_mode, state, 1321 !!(pl->link_config.pause & MLO_PAUSE_AN)); 1322 if (err < 0) { 1323 phylink_err(pl, "pcs_config failed: %pe\n", ERR_PTR(err)); 1324 pl->major_config_failed = true; 1325 } else if (err > 0) { 1326 restart = true; 1327 } 1328 1329 if (restart) 1330 phylink_pcs_an_restart(pl); 1331 1332 if (pl->mac_ops->mac_finish) { 1333 err = pl->mac_ops->mac_finish(pl->config, pl->act_link_an_mode, 1334 state->interface); 1335 if (err < 0) { 1336 phylink_err(pl, "mac_finish failed: %pe\n", 1337 ERR_PTR(err)); 1338 1339 pl->major_config_failed = true; 1340 } 1341 } 1342 1343 if (pl->phydev && pl->phy_ib_mode) { 1344 phylink_dbg(pl, "configuring PHY for inband%s%s%s\n", 1345 pl->phy_ib_mode & LINK_INBAND_DISABLE ? 1346 " disable" : "", 1347 pl->phy_ib_mode & LINK_INBAND_ENABLE ? 1348 " enable" : "", 1349 pl->phy_ib_mode & LINK_INBAND_BYPASS ? 1350 " bypass" : ""); 1351 err = phy_config_inband(pl->phydev, pl->phy_ib_mode); 1352 if (err < 0) { 1353 phylink_err(pl, "phy_config_inband: %pe\n", 1354 ERR_PTR(err)); 1355 1356 pl->major_config_failed = true; 1357 } 1358 } 1359 1360 if (pl->sfp_bus) { 1361 rate_kbd = phylink_interface_signal_rate(state->interface); 1362 if (rate_kbd) 1363 sfp_upstream_set_signal_rate(pl->sfp_bus, rate_kbd); 1364 } 1365 1366 phylink_pcs_poll_start(pl); 1367 } 1368 1369 /* 1370 * Reconfigure for a change of inband advertisement. 1371 * If we have a separate PCS, we only need to call its pcs_config() method, 1372 * and then restart AN if it indicates something changed. Otherwise, we do 1373 * the full MAC reconfiguration. 1374 */ 1375 static int phylink_change_inband_advert(struct phylink *pl) 1376 { 1377 int ret; 1378 1379 if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) 1380 return 0; 1381 1382 phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__, 1383 phylink_an_mode_str(pl->req_link_an_mode), 1384 phy_modes(pl->link_config.interface), 1385 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->link_config.advertising, 1386 pl->link_config.pause); 1387 1388 /* Recompute the PCS neg mode */ 1389 phylink_pcs_neg_mode(pl, pl->pcs, pl->link_config.interface, 1390 pl->link_config.advertising); 1391 1392 /* Modern PCS-based method; update the advert at the PCS, and 1393 * restart negotiation if the pcs_config() helper indicates that 1394 * the programmed advertisement has changed. 1395 */ 1396 ret = phylink_pcs_config(pl->pcs, pl->pcs_neg_mode, &pl->link_config, 1397 !!(pl->link_config.pause & MLO_PAUSE_AN)); 1398 if (ret < 0) 1399 return ret; 1400 1401 if (ret > 0) 1402 phylink_pcs_an_restart(pl); 1403 1404 return 0; 1405 } 1406 1407 static void phylink_mac_pcs_get_state(struct phylink *pl, 1408 struct phylink_link_state *state) 1409 { 1410 struct phylink_pcs *pcs; 1411 bool autoneg; 1412 1413 linkmode_copy(state->advertising, pl->link_config.advertising); 1414 linkmode_zero(state->lp_advertising); 1415 state->interface = pl->link_config.interface; 1416 state->rate_matching = pl->link_config.rate_matching; 1417 state->an_complete = 0; 1418 state->link = 1; 1419 1420 autoneg = pl->pcs_neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED; 1421 if (autoneg) { 1422 state->speed = SPEED_UNKNOWN; 1423 state->duplex = DUPLEX_UNKNOWN; 1424 state->pause = MLO_PAUSE_NONE; 1425 } else { 1426 state->speed = pl->link_config.speed; 1427 state->duplex = pl->link_config.duplex; 1428 state->pause = pl->link_config.pause; 1429 } 1430 1431 pcs = pl->pcs; 1432 if (pcs) 1433 pcs->ops->pcs_get_state(pcs, pl->pcs_neg_mode, state); 1434 else 1435 state->link = 0; 1436 } 1437 1438 /* The fixed state is... fixed except for the link state, 1439 * which may be determined by a GPIO or a callback. 1440 */ 1441 static void phylink_get_fixed_state(struct phylink *pl, 1442 struct phylink_link_state *state) 1443 { 1444 *state = pl->link_config; 1445 if (pl->config->get_fixed_state) 1446 pl->config->get_fixed_state(pl->config, state); 1447 else if (pl->link_gpio) 1448 state->link = !!gpiod_get_value_cansleep(pl->link_gpio); 1449 1450 state->pause = MLO_PAUSE_NONE; 1451 phylink_resolve_an_pause(state); 1452 } 1453 1454 static void phylink_mac_initial_config(struct phylink *pl, bool force_restart) 1455 { 1456 struct phylink_link_state link_state; 1457 struct phy_device *phy = pl->phydev; 1458 1459 switch (pl->req_link_an_mode) { 1460 case MLO_AN_PHY: 1461 link_state = pl->phy_state; 1462 break; 1463 1464 case MLO_AN_FIXED: 1465 phylink_get_fixed_state(pl, &link_state); 1466 break; 1467 1468 case MLO_AN_INBAND: 1469 link_state = pl->link_config; 1470 if (link_state.interface == PHY_INTERFACE_MODE_SGMII) 1471 link_state.pause = MLO_PAUSE_NONE; 1472 break; 1473 1474 default: /* can't happen */ 1475 return; 1476 } 1477 1478 link_state.link = false; 1479 1480 phylink_apply_manual_flow(pl, &link_state); 1481 if (phy) 1482 mutex_lock(&phy->lock); 1483 phylink_major_config(pl, force_restart, &link_state); 1484 if (phy) 1485 mutex_unlock(&phy->lock); 1486 } 1487 1488 static const char *phylink_pause_to_str(int pause) 1489 { 1490 switch (pause & MLO_PAUSE_TXRX_MASK) { 1491 case MLO_PAUSE_TX | MLO_PAUSE_RX: 1492 return "rx/tx"; 1493 case MLO_PAUSE_TX: 1494 return "tx"; 1495 case MLO_PAUSE_RX: 1496 return "rx"; 1497 default: 1498 return "off"; 1499 } 1500 } 1501 1502 static void phylink_deactivate_lpi(struct phylink *pl) 1503 { 1504 if (pl->mac_enable_tx_lpi) { 1505 pl->mac_enable_tx_lpi = false; 1506 1507 phylink_dbg(pl, "disabling LPI\n"); 1508 1509 pl->mac_ops->mac_disable_tx_lpi(pl->config); 1510 1511 phylink_pcs_disable_eee(pl->pcs); 1512 } 1513 } 1514 1515 static void phylink_activate_lpi(struct phylink *pl) 1516 { 1517 int err; 1518 1519 if (!test_bit(pl->cur_interface, pl->config->lpi_interfaces)) { 1520 phylink_dbg(pl, "MAC does not support LPI with %s\n", 1521 phy_modes(pl->cur_interface)); 1522 return; 1523 } 1524 1525 phylink_dbg(pl, "LPI timer %uus, tx clock stop %u\n", 1526 pl->mac_tx_lpi_timer, pl->mac_tx_clk_stop); 1527 1528 phylink_pcs_enable_eee(pl->pcs); 1529 1530 err = pl->mac_ops->mac_enable_tx_lpi(pl->config, pl->mac_tx_lpi_timer, 1531 pl->mac_tx_clk_stop); 1532 if (err) { 1533 phylink_pcs_disable_eee(pl->pcs); 1534 phylink_err(pl, "%ps() failed: %pe\n", 1535 pl->mac_ops->mac_enable_tx_lpi, ERR_PTR(err)); 1536 return; 1537 } 1538 1539 pl->mac_enable_tx_lpi = true; 1540 } 1541 1542 static void phylink_link_up(struct phylink *pl, 1543 struct phylink_link_state link_state) 1544 { 1545 struct net_device *ndev = pl->netdev; 1546 int speed, duplex; 1547 bool rx_pause; 1548 1549 speed = link_state.speed; 1550 duplex = link_state.duplex; 1551 rx_pause = !!(link_state.pause & MLO_PAUSE_RX); 1552 1553 switch (link_state.rate_matching) { 1554 case RATE_MATCH_PAUSE: 1555 /* The PHY is doing rate matchion from the media rate (in 1556 * the link_state) to the interface speed, and will send 1557 * pause frames to the MAC to limit its transmission speed. 1558 */ 1559 speed = phylink_interface_max_speed(link_state.interface); 1560 duplex = DUPLEX_FULL; 1561 rx_pause = true; 1562 break; 1563 1564 case RATE_MATCH_CRS: 1565 /* The PHY is doing rate matchion from the media rate (in 1566 * the link_state) to the interface speed, and will cause 1567 * collisions to the MAC to limit its transmission speed. 1568 */ 1569 speed = phylink_interface_max_speed(link_state.interface); 1570 duplex = DUPLEX_HALF; 1571 break; 1572 } 1573 1574 pl->cur_interface = link_state.interface; 1575 1576 phylink_pcs_link_up(pl->pcs, pl->pcs_neg_mode, pl->cur_interface, speed, 1577 duplex); 1578 1579 pl->mac_ops->mac_link_up(pl->config, pl->phydev, pl->act_link_an_mode, 1580 pl->cur_interface, speed, duplex, 1581 !!(link_state.pause & MLO_PAUSE_TX), rx_pause); 1582 1583 if (pl->mac_supports_eee && pl->phy_enable_tx_lpi) 1584 phylink_activate_lpi(pl); 1585 1586 if (ndev) 1587 netif_carrier_on(ndev); 1588 1589 phylink_info(pl, 1590 "Link is Up - %s/%s - flow control %s\n", 1591 phy_speed_to_str(link_state.speed), 1592 phy_duplex_to_str(link_state.duplex), 1593 phylink_pause_to_str(link_state.pause)); 1594 } 1595 1596 static void phylink_link_down(struct phylink *pl) 1597 { 1598 struct net_device *ndev = pl->netdev; 1599 1600 if (ndev) 1601 netif_carrier_off(ndev); 1602 1603 phylink_deactivate_lpi(pl); 1604 1605 pl->mac_ops->mac_link_down(pl->config, pl->act_link_an_mode, 1606 pl->cur_interface); 1607 phylink_info(pl, "Link is Down\n"); 1608 } 1609 1610 static bool phylink_link_is_up(struct phylink *pl) 1611 { 1612 return pl->netdev ? netif_carrier_ok(pl->netdev) : pl->old_link_state; 1613 } 1614 1615 static void phylink_resolve(struct work_struct *w) 1616 { 1617 struct phylink *pl = container_of(w, struct phylink, resolve); 1618 struct phylink_link_state link_state; 1619 bool mac_config = false; 1620 bool retrigger = false; 1621 struct phy_device *phy; 1622 bool cur_link_state; 1623 1624 mutex_lock(&pl->phydev_mutex); 1625 phy = pl->phydev; 1626 if (phy) 1627 mutex_lock(&phy->lock); 1628 mutex_lock(&pl->state_mutex); 1629 cur_link_state = phylink_link_is_up(pl); 1630 1631 if (pl->phylink_disable_state) { 1632 pl->link_failed = false; 1633 link_state.link = false; 1634 } else if (pl->link_failed) { 1635 link_state.link = false; 1636 retrigger = true; 1637 } else if (pl->act_link_an_mode == MLO_AN_FIXED) { 1638 phylink_get_fixed_state(pl, &link_state); 1639 mac_config = link_state.link; 1640 } else if (pl->act_link_an_mode == MLO_AN_PHY) { 1641 link_state = pl->phy_state; 1642 mac_config = link_state.link; 1643 } else { 1644 phylink_mac_pcs_get_state(pl, &link_state); 1645 1646 /* The PCS may have a latching link-fail indicator. If the link 1647 * was up, bring the link down and re-trigger the resolve. 1648 * Otherwise, re-read the PCS state to get the current status 1649 * of the link. 1650 */ 1651 if (!link_state.link) { 1652 if (cur_link_state) 1653 retrigger = true; 1654 else 1655 phylink_mac_pcs_get_state(pl, &link_state); 1656 } 1657 1658 /* If we have a phy, the "up" state is the union of both the 1659 * PHY and the MAC 1660 */ 1661 if (phy) 1662 link_state.link &= pl->phy_state.link; 1663 1664 /* Only update if the PHY link is up */ 1665 if (phy && pl->phy_state.link) { 1666 /* If the interface has changed, force a link down 1667 * event if the link isn't already down, and re-resolve. 1668 */ 1669 if (link_state.interface != pl->phy_state.interface) { 1670 retrigger = true; 1671 link_state.link = false; 1672 } 1673 1674 link_state.interface = pl->phy_state.interface; 1675 1676 /* If we are doing rate matching, then the link 1677 * speed/duplex comes from the PHY 1678 */ 1679 if (pl->phy_state.rate_matching) { 1680 link_state.rate_matching = 1681 pl->phy_state.rate_matching; 1682 link_state.speed = pl->phy_state.speed; 1683 link_state.duplex = pl->phy_state.duplex; 1684 } 1685 1686 /* If we have a PHY, we need to update with the PHY 1687 * flow control bits. 1688 */ 1689 link_state.pause = pl->phy_state.pause; 1690 mac_config = true; 1691 } 1692 } 1693 1694 if (pl->act_link_an_mode != MLO_AN_FIXED) 1695 phylink_apply_manual_flow(pl, &link_state); 1696 1697 if ((mac_config && link_state.interface != pl->link_config.interface) || 1698 pl->force_major_config) { 1699 /* The interface has changed or a forced major configuration 1700 * was requested, so force the link down and then reconfigure. 1701 */ 1702 if (cur_link_state) { 1703 phylink_link_down(pl); 1704 cur_link_state = false; 1705 } 1706 phylink_major_config(pl, false, &link_state); 1707 pl->link_config.interface = link_state.interface; 1708 pl->force_major_config = false; 1709 } 1710 1711 /* If configuration of the interface failed, force the link down 1712 * until we get a successful configuration. 1713 */ 1714 if (pl->major_config_failed) 1715 link_state.link = false; 1716 1717 if (link_state.link != cur_link_state) { 1718 pl->old_link_state = link_state.link; 1719 if (!link_state.link) 1720 phylink_link_down(pl); 1721 else 1722 phylink_link_up(pl, link_state); 1723 } 1724 if (!link_state.link && retrigger) { 1725 pl->link_failed = false; 1726 queue_work(system_power_efficient_wq, &pl->resolve); 1727 } 1728 mutex_unlock(&pl->state_mutex); 1729 if (phy) 1730 mutex_unlock(&phy->lock); 1731 mutex_unlock(&pl->phydev_mutex); 1732 } 1733 1734 static void phylink_run_resolve(struct phylink *pl) 1735 { 1736 if (!pl->phylink_disable_state) 1737 queue_work(system_power_efficient_wq, &pl->resolve); 1738 } 1739 1740 static void phylink_run_resolve_and_disable(struct phylink *pl, int bit) 1741 { 1742 unsigned long state = pl->phylink_disable_state; 1743 1744 set_bit(bit, &pl->phylink_disable_state); 1745 if (state == 0) { 1746 queue_work(system_power_efficient_wq, &pl->resolve); 1747 flush_work(&pl->resolve); 1748 } 1749 } 1750 1751 static void phylink_enable_and_run_resolve(struct phylink *pl, int bit) 1752 { 1753 clear_bit(bit, &pl->phylink_disable_state); 1754 phylink_run_resolve(pl); 1755 } 1756 1757 static void phylink_fixed_poll(struct timer_list *t) 1758 { 1759 struct phylink *pl = container_of(t, struct phylink, link_poll); 1760 1761 mod_timer(t, jiffies + HZ); 1762 1763 phylink_run_resolve(pl); 1764 } 1765 1766 static const struct sfp_upstream_ops sfp_phylink_ops; 1767 1768 static int phylink_register_sfp(struct phylink *pl, 1769 const struct fwnode_handle *fwnode) 1770 { 1771 struct sfp_bus *bus; 1772 int ret; 1773 1774 if (!fwnode) 1775 return 0; 1776 1777 bus = sfp_bus_find_fwnode(fwnode); 1778 if (IS_ERR(bus)) { 1779 phylink_err(pl, "unable to attach SFP bus: %pe\n", bus); 1780 return PTR_ERR(bus); 1781 } 1782 1783 pl->sfp_bus = bus; 1784 1785 ret = sfp_bus_add_upstream(bus, pl, &sfp_phylink_ops); 1786 sfp_bus_put(bus); 1787 1788 return ret; 1789 } 1790 1791 /** 1792 * phylink_set_fixed_link() - set the fixed link 1793 * @pl: a pointer to a &struct phylink returned from phylink_create() 1794 * @state: a pointer to a struct phylink_link_state. 1795 * 1796 * This function is used when the link parameters are known and do not change, 1797 * making it suitable for certain types of network connections. 1798 * 1799 * Returns: zero on success or negative error code. 1800 */ 1801 int phylink_set_fixed_link(struct phylink *pl, 1802 const struct phylink_link_state *state) 1803 { 1804 const struct link_capabilities *c; 1805 unsigned long *adv; 1806 1807 if (pl->cfg_link_an_mode != MLO_AN_PHY || !state || 1808 !test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) 1809 return -EINVAL; 1810 1811 c = phy_caps_lookup(state->speed, state->duplex, 1812 pl->supported, true); 1813 if (!c) 1814 return -EINVAL; 1815 1816 adv = pl->link_config.advertising; 1817 linkmode_and(adv, pl->supported, c->linkmodes); 1818 linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, adv); 1819 1820 pl->link_config.speed = state->speed; 1821 pl->link_config.duplex = state->duplex; 1822 pl->link_config.link = 1; 1823 pl->link_config.an_complete = 1; 1824 1825 pl->cfg_link_an_mode = MLO_AN_FIXED; 1826 pl->req_link_an_mode = pl->cfg_link_an_mode; 1827 1828 return 0; 1829 } 1830 EXPORT_SYMBOL_GPL(phylink_set_fixed_link); 1831 1832 /** 1833 * phylink_create() - create a phylink instance 1834 * @config: a pointer to the target &struct phylink_config 1835 * @fwnode: a pointer to a &struct fwnode_handle describing the network 1836 * interface 1837 * @iface: the desired link mode defined by &typedef phy_interface_t 1838 * @mac_ops: a pointer to a &struct phylink_mac_ops for the MAC. 1839 * 1840 * Create a new phylink instance, and parse the link parameters found in @np. 1841 * This will parse in-band modes, fixed-link or SFP configuration. 1842 * 1843 * Note: the rtnl lock must not be held when calling this function. 1844 * 1845 * Returns a pointer to a &struct phylink, or an error-pointer value. Users 1846 * must use IS_ERR() to check for errors from this function. 1847 */ 1848 struct phylink *phylink_create(struct phylink_config *config, 1849 const struct fwnode_handle *fwnode, 1850 phy_interface_t iface, 1851 const struct phylink_mac_ops *mac_ops) 1852 { 1853 struct phylink *pl; 1854 int ret; 1855 1856 /* Validate the supplied configuration */ 1857 if (phy_interface_empty(config->supported_interfaces)) { 1858 dev_err(config->dev, 1859 "phylink: error: empty supported_interfaces\n"); 1860 return ERR_PTR(-EINVAL); 1861 } 1862 1863 pl = kzalloc_obj(*pl); 1864 if (!pl) 1865 return ERR_PTR(-ENOMEM); 1866 1867 mutex_init(&pl->phydev_mutex); 1868 mutex_init(&pl->state_mutex); 1869 INIT_WORK(&pl->resolve, phylink_resolve); 1870 1871 pl->config = config; 1872 if (config->type == PHYLINK_NETDEV) { 1873 pl->netdev = to_net_dev(config->dev); 1874 netif_carrier_off(pl->netdev); 1875 } else if (config->type == PHYLINK_DEV) { 1876 pl->dev = config->dev; 1877 } else { 1878 ret = -EINVAL; 1879 goto free_pl; 1880 } 1881 1882 pl->mac_supports_eee_ops = phylink_mac_implements_lpi(mac_ops); 1883 pl->mac_supports_eee = pl->mac_supports_eee_ops && 1884 pl->config->lpi_capabilities && 1885 !phy_interface_empty(pl->config->lpi_interfaces); 1886 1887 /* Set the default EEE configuration */ 1888 pl->eee_cfg.eee_enabled = pl->config->eee_enabled_default; 1889 pl->eee_cfg.tx_lpi_enabled = pl->eee_cfg.eee_enabled; 1890 pl->eee_cfg.tx_lpi_timer = pl->config->lpi_timer_default; 1891 1892 pl->phy_state.interface = iface; 1893 pl->link_interface = iface; 1894 if (iface == PHY_INTERFACE_MODE_MOCA) 1895 pl->link_port = PORT_BNC; 1896 else 1897 pl->link_port = PORT_MII; 1898 pl->link_config.interface = iface; 1899 pl->link_config.pause = MLO_PAUSE_AN; 1900 pl->link_config.speed = SPEED_UNKNOWN; 1901 pl->link_config.duplex = DUPLEX_UNKNOWN; 1902 pl->pcs_state = PCS_STATE_DOWN; 1903 pl->mac_ops = mac_ops; 1904 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 1905 timer_setup(&pl->link_poll, phylink_fixed_poll, 0); 1906 1907 linkmode_fill(pl->supported); 1908 linkmode_copy(pl->link_config.advertising, pl->supported); 1909 phylink_validate(pl, pl->supported, &pl->link_config); 1910 1911 ret = phylink_parse_mode(pl, fwnode); 1912 if (ret < 0) 1913 goto free_pl; 1914 1915 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 1916 ret = phylink_parse_fixedlink(pl, fwnode); 1917 if (ret < 0) 1918 goto release_link_gpio; 1919 } 1920 1921 pl->req_link_an_mode = pl->cfg_link_an_mode; 1922 1923 ret = phylink_register_sfp(pl, fwnode); 1924 if (ret < 0) 1925 goto release_link_gpio; 1926 1927 return pl; 1928 1929 release_link_gpio: 1930 if (pl->link_gpio) 1931 gpiod_put(pl->link_gpio); 1932 free_pl: 1933 kfree(pl); 1934 return ERR_PTR(ret); 1935 } 1936 EXPORT_SYMBOL_GPL(phylink_create); 1937 1938 /** 1939 * phylink_destroy() - cleanup and destroy the phylink instance 1940 * @pl: a pointer to a &struct phylink returned from phylink_create() 1941 * 1942 * Destroy a phylink instance. Any PHY that has been attached must have been 1943 * cleaned up via phylink_disconnect_phy() prior to calling this function. 1944 * 1945 * Note: the rtnl lock must not be held when calling this function. 1946 */ 1947 void phylink_destroy(struct phylink *pl) 1948 { 1949 sfp_bus_del_upstream(pl->sfp_bus); 1950 if (pl->link_gpio) 1951 gpiod_put(pl->link_gpio); 1952 1953 cancel_work_sync(&pl->resolve); 1954 kfree(pl); 1955 } 1956 EXPORT_SYMBOL_GPL(phylink_destroy); 1957 1958 /** 1959 * phylink_expects_phy() - Determine if phylink expects a phy to be attached 1960 * @pl: a pointer to a &struct phylink returned from phylink_create() 1961 * 1962 * When using fixed-link mode, or in-band mode with 1000base-X or 2500base-X, 1963 * no PHY is needed. 1964 * 1965 * Returns true if phylink will be expecting a PHY. 1966 */ 1967 bool phylink_expects_phy(struct phylink *pl) 1968 { 1969 if (pl->cfg_link_an_mode == MLO_AN_FIXED || 1970 (pl->cfg_link_an_mode == MLO_AN_INBAND && 1971 phy_interface_mode_is_8023z(pl->link_interface))) 1972 return false; 1973 return true; 1974 } 1975 EXPORT_SYMBOL_GPL(phylink_expects_phy); 1976 1977 static void phylink_phy_change(struct phy_device *phydev, bool up) 1978 { 1979 struct phylink *pl = phydev->phylink; 1980 bool tx_pause, rx_pause; 1981 1982 phy_get_pause(phydev, &tx_pause, &rx_pause); 1983 1984 mutex_lock(&pl->state_mutex); 1985 pl->phy_state.speed = phydev->speed; 1986 pl->phy_state.duplex = phydev->duplex; 1987 pl->phy_state.rate_matching = phydev->rate_matching; 1988 pl->phy_state.pause = MLO_PAUSE_NONE; 1989 if (tx_pause) 1990 pl->phy_state.pause |= MLO_PAUSE_TX; 1991 if (rx_pause) 1992 pl->phy_state.pause |= MLO_PAUSE_RX; 1993 pl->phy_state.interface = phydev->interface; 1994 pl->phy_state.link = up; 1995 if (!up) 1996 pl->link_failed = true; 1997 1998 /* Get the LPI state from phylib */ 1999 pl->phy_enable_tx_lpi = phydev->enable_tx_lpi; 2000 pl->mac_tx_lpi_timer = phydev->eee_cfg.tx_lpi_timer; 2001 mutex_unlock(&pl->state_mutex); 2002 2003 phylink_run_resolve(pl); 2004 2005 phylink_dbg(pl, "phy link %s %s/%s/%s/%s/%s/%slpi\n", 2006 up ? "up" : "down", 2007 phy_modes(phydev->interface), 2008 phy_speed_to_str(phydev->speed), 2009 phy_duplex_to_str(phydev->duplex), 2010 phy_rate_matching_to_str(phydev->rate_matching), 2011 phylink_pause_to_str(pl->phy_state.pause), 2012 phydev->enable_tx_lpi ? "" : "no"); 2013 } 2014 2015 static int phylink_validate_phy(struct phylink *pl, struct phy_device *phy, 2016 unsigned long *supported, 2017 struct phylink_link_state *state) 2018 { 2019 DECLARE_PHY_INTERFACE_MASK(interfaces); 2020 2021 /* If the PHY provides a bitmap of the interfaces it will be using 2022 * depending on the negotiated media speeds, use this to validate 2023 * which ethtool link modes can be used. 2024 */ 2025 if (!phy_interface_empty(phy->possible_interfaces)) { 2026 /* We only care about the union of the PHY's interfaces and 2027 * those which the host supports. 2028 */ 2029 phy_interface_and(interfaces, phy->possible_interfaces, 2030 pl->config->supported_interfaces); 2031 2032 if (phy_interface_empty(interfaces)) { 2033 phylink_err(pl, "PHY has no common interfaces\n"); 2034 return -EINVAL; 2035 } 2036 2037 if (phy_on_sfp(phy)) { 2038 /* If the PHY is on a SFP, limit the interfaces to 2039 * those that can be used with a SFP module. 2040 */ 2041 phy_interface_and(interfaces, interfaces, 2042 phylink_sfp_interfaces); 2043 2044 if (phy_interface_empty(interfaces)) { 2045 phylink_err(pl, "SFP PHY's possible interfaces becomes empty\n"); 2046 return -EINVAL; 2047 } 2048 } 2049 2050 phylink_dbg(pl, "PHY %s uses interfaces %*pbl, validating %*pbl\n", 2051 phydev_name(phy), 2052 (int)PHY_INTERFACE_MODE_MAX, 2053 phy->possible_interfaces, 2054 (int)PHY_INTERFACE_MODE_MAX, interfaces); 2055 2056 return phylink_validate_mask(pl, phy, supported, state, 2057 interfaces); 2058 } 2059 2060 phylink_dbg(pl, "PHY %s doesn't supply possible interfaces\n", 2061 phydev_name(phy)); 2062 2063 /* Check whether we would use rate matching for the proposed interface 2064 * mode. 2065 */ 2066 state->rate_matching = phy_get_rate_matching(phy, state->interface); 2067 2068 /* Clause 45 PHYs may switch their Serdes lane between, e.g. 10GBASE-R, 2069 * 5GBASE-R, 2500BASE-X and SGMII if they are not using rate matching. 2070 * For some interface modes (e.g. RXAUI, XAUI and USXGMII) switching 2071 * their Serdes is either unnecessary or not reasonable. 2072 * 2073 * For these which switch interface modes, we really need to know which 2074 * interface modes the PHY supports to properly work out which ethtool 2075 * linkmodes can be supported. For now, as a work-around, we validate 2076 * against all interface modes, which may lead to more ethtool link 2077 * modes being advertised than are actually supported. 2078 */ 2079 if (phy->is_c45 && state->rate_matching == RATE_MATCH_NONE && 2080 state->interface != PHY_INTERFACE_MODE_RXAUI && 2081 state->interface != PHY_INTERFACE_MODE_XAUI && 2082 state->interface != PHY_INTERFACE_MODE_USXGMII) 2083 state->interface = PHY_INTERFACE_MODE_NA; 2084 2085 return phylink_validate(pl, supported, state); 2086 } 2087 2088 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy, 2089 phy_interface_t interface) 2090 { 2091 struct phylink_link_state config; 2092 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 2093 char *irq_str; 2094 int ret; 2095 2096 /* 2097 * This is the new way of dealing with flow control for PHYs, 2098 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 2099 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 2100 * using our validate call to the MAC, we rely upon the MAC 2101 * clearing the bits from both supported and advertising fields. 2102 */ 2103 phy_support_asym_pause(phy); 2104 2105 memset(&config, 0, sizeof(config)); 2106 linkmode_copy(supported, phy->supported); 2107 linkmode_copy(config.advertising, phy->advertising); 2108 config.interface = interface; 2109 2110 ret = phylink_validate_phy(pl, phy, supported, &config); 2111 if (ret) { 2112 phylink_warn(pl, "validation of %s with support %*pb and advertisement %*pb failed: %pe\n", 2113 phy_modes(config.interface), 2114 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->supported, 2115 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising, 2116 ERR_PTR(ret)); 2117 return ret; 2118 } 2119 2120 phy->phylink = pl; 2121 phy->phy_link_change = phylink_phy_change; 2122 2123 irq_str = phy_attached_info_irq(phy); 2124 phylink_info(pl, 2125 "PHY [%s] driver [%s] (irq=%s)\n", 2126 dev_name(&phy->mdio.dev), phy->drv->name, irq_str); 2127 kfree(irq_str); 2128 2129 mutex_lock(&pl->phydev_mutex); 2130 mutex_lock(&phy->lock); 2131 mutex_lock(&pl->state_mutex); 2132 pl->phydev = phy; 2133 pl->phy_state.interface = interface; 2134 pl->phy_state.pause = MLO_PAUSE_NONE; 2135 pl->phy_state.speed = SPEED_UNKNOWN; 2136 pl->phy_state.duplex = DUPLEX_UNKNOWN; 2137 pl->phy_state.rate_matching = RATE_MATCH_NONE; 2138 linkmode_copy(pl->supported, supported); 2139 linkmode_copy(pl->link_config.advertising, config.advertising); 2140 2141 /* Restrict the phy advertisement according to the MAC support. */ 2142 linkmode_copy(phy->advertising, config.advertising); 2143 2144 /* If the MAC supports phylink managed EEE, restrict the EEE 2145 * advertisement according to the MAC's LPI capabilities. 2146 */ 2147 if (pl->mac_supports_eee) { 2148 /* If EEE is enabled, then we need to call phy_support_eee() 2149 * to ensure that the advertising mask is appropriately set. 2150 * This also enables EEE at the PHY. 2151 */ 2152 if (pl->eee_cfg.eee_enabled) 2153 phy_support_eee(phy); 2154 2155 phy->eee_cfg.tx_lpi_enabled = pl->eee_cfg.tx_lpi_enabled; 2156 phy->eee_cfg.tx_lpi_timer = pl->eee_cfg.tx_lpi_timer; 2157 2158 /* Convert the MAC's LPI capabilities to linkmodes */ 2159 linkmode_zero(pl->supported_lpi); 2160 phylink_caps_to_linkmodes(pl->supported_lpi, 2161 pl->config->lpi_capabilities); 2162 2163 /* Restrict the PHYs EEE support/advertisement to the modes 2164 * that the MAC supports. 2165 */ 2166 linkmode_and(phy->advertising_eee, phy->advertising_eee, 2167 pl->supported_lpi); 2168 } else if (pl->mac_supports_eee_ops) { 2169 /* MAC supports phylink EEE, but wants EEE always disabled. */ 2170 phy_disable_eee(phy); 2171 } 2172 2173 mutex_unlock(&pl->state_mutex); 2174 mutex_unlock(&phy->lock); 2175 mutex_unlock(&pl->phydev_mutex); 2176 2177 phylink_dbg(pl, 2178 "phy: %s setting supported %*pb advertising %*pb\n", 2179 phy_modes(interface), 2180 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported, 2181 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising); 2182 2183 if (pl->config->mac_managed_pm) 2184 phy->mac_managed_pm = true; 2185 2186 /* Allow the MAC to stop its clock if the PHY has the capability */ 2187 pl->mac_tx_clk_stop = phy_eee_tx_clock_stop_capable(phy) > 0; 2188 2189 if (pl->mac_supports_eee_ops) { 2190 /* Explicitly configure whether the PHY is allowed to stop it's 2191 * receive clock. 2192 */ 2193 ret = phy_eee_rx_clock_stop(phy, 2194 pl->config->eee_rx_clk_stop_enable); 2195 if (ret == -EOPNOTSUPP) 2196 ret = 0; 2197 } 2198 2199 if (ret == 0 && phy_interrupt_is_valid(phy)) 2200 phy_request_interrupt(phy); 2201 2202 return ret; 2203 } 2204 2205 static int phylink_attach_phy(struct phylink *pl, struct phy_device *phy, 2206 phy_interface_t interface) 2207 { 2208 u32 flags = 0; 2209 2210 if (WARN_ON(pl->cfg_link_an_mode == MLO_AN_FIXED || 2211 (pl->cfg_link_an_mode == MLO_AN_INBAND && 2212 phy_interface_mode_is_8023z(interface) && !pl->sfp_bus))) 2213 return -EINVAL; 2214 2215 if (pl->phydev) 2216 return -EBUSY; 2217 2218 if (pl->config->mac_requires_rxc) 2219 flags |= PHY_F_RXC_ALWAYS_ON; 2220 2221 return phy_attach_direct(pl->netdev, phy, flags, interface); 2222 } 2223 2224 /** 2225 * phylink_connect_phy() - connect a PHY to the phylink instance 2226 * @pl: a pointer to a &struct phylink returned from phylink_create() 2227 * @phy: a pointer to a &struct phy_device. 2228 * 2229 * Connect @phy to the phylink instance specified by @pl by calling 2230 * phy_attach_direct(). Configure the @phy according to the MAC driver's 2231 * capabilities, start the PHYLIB state machine and enable any interrupts 2232 * that the PHY supports. 2233 * 2234 * This updates the phylink's ethtool supported and advertising link mode 2235 * masks. 2236 * 2237 * Returns 0 on success or a negative errno. 2238 */ 2239 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy) 2240 { 2241 int ret; 2242 2243 /* Use PHY device/driver interface */ 2244 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 2245 pl->link_interface = phy->interface; 2246 pl->link_config.interface = pl->link_interface; 2247 } 2248 2249 ret = phylink_attach_phy(pl, phy, pl->link_interface); 2250 if (ret < 0) 2251 return ret; 2252 2253 ret = phylink_bringup_phy(pl, phy, pl->link_config.interface); 2254 if (ret) 2255 phy_detach(phy); 2256 2257 return ret; 2258 } 2259 EXPORT_SYMBOL_GPL(phylink_connect_phy); 2260 2261 /** 2262 * phylink_of_phy_connect() - connect the PHY specified in the DT mode. 2263 * @pl: a pointer to a &struct phylink returned from phylink_create() 2264 * @dn: a pointer to a &struct device_node. 2265 * @flags: PHY-specific flags to communicate to the PHY device driver 2266 * 2267 * Connect the phy specified in the device node @dn to the phylink instance 2268 * specified by @pl. Actions specified in phylink_connect_phy() will be 2269 * performed. 2270 * 2271 * Returns 0 on success or a negative errno. 2272 */ 2273 int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn, 2274 u32 flags) 2275 { 2276 return phylink_fwnode_phy_connect(pl, of_fwnode_handle(dn), flags); 2277 } 2278 EXPORT_SYMBOL_GPL(phylink_of_phy_connect); 2279 2280 /** 2281 * phylink_fwnode_phy_connect() - connect the PHY specified in the fwnode. 2282 * @pl: a pointer to a &struct phylink returned from phylink_create() 2283 * @fwnode: a pointer to a &struct fwnode_handle. 2284 * @flags: PHY-specific flags to communicate to the PHY device driver 2285 * 2286 * Connect the phy specified @fwnode to the phylink instance specified 2287 * by @pl. 2288 * 2289 * Returns 0 on success or a negative errno. 2290 */ 2291 int phylink_fwnode_phy_connect(struct phylink *pl, 2292 const struct fwnode_handle *fwnode, 2293 u32 flags) 2294 { 2295 struct fwnode_handle *phy_fwnode; 2296 struct phy_device *phy_dev; 2297 int ret; 2298 2299 if (!phylink_expects_phy(pl)) 2300 return 0; 2301 2302 phy_fwnode = fwnode_get_phy_node(fwnode); 2303 if (IS_ERR(phy_fwnode)) { 2304 /* PHY mode requires a PHY to be specified. */ 2305 if (pl->cfg_link_an_mode == MLO_AN_PHY) 2306 return -ENODEV; 2307 return 0; 2308 } 2309 2310 phy_dev = fwnode_phy_find_device(phy_fwnode); 2311 /* We're done with the phy_node handle */ 2312 fwnode_handle_put(phy_fwnode); 2313 if (!phy_dev) 2314 return -ENODEV; 2315 2316 /* Use PHY device/driver interface */ 2317 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 2318 pl->link_interface = phy_dev->interface; 2319 pl->link_config.interface = pl->link_interface; 2320 } 2321 2322 if (pl->config->mac_requires_rxc) 2323 flags |= PHY_F_RXC_ALWAYS_ON; 2324 2325 ret = phy_attach_direct(pl->netdev, phy_dev, flags, 2326 pl->link_interface); 2327 phy_device_free(phy_dev); 2328 if (ret) 2329 return ret; 2330 2331 ret = phylink_bringup_phy(pl, phy_dev, pl->link_config.interface); 2332 if (ret) 2333 phy_detach(phy_dev); 2334 2335 return ret; 2336 } 2337 EXPORT_SYMBOL_GPL(phylink_fwnode_phy_connect); 2338 2339 /** 2340 * phylink_disconnect_phy() - disconnect any PHY attached to the phylink 2341 * instance. 2342 * @pl: a pointer to a &struct phylink returned from phylink_create() 2343 * 2344 * Disconnect any current PHY from the phylink instance described by @pl. 2345 */ 2346 void phylink_disconnect_phy(struct phylink *pl) 2347 { 2348 struct phy_device *phy; 2349 2350 ASSERT_RTNL(); 2351 2352 mutex_lock(&pl->phydev_mutex); 2353 phy = pl->phydev; 2354 if (phy) { 2355 mutex_lock(&phy->lock); 2356 mutex_lock(&pl->state_mutex); 2357 pl->phydev = NULL; 2358 pl->phy_enable_tx_lpi = false; 2359 pl->mac_tx_clk_stop = false; 2360 mutex_unlock(&pl->state_mutex); 2361 mutex_unlock(&phy->lock); 2362 } 2363 mutex_unlock(&pl->phydev_mutex); 2364 2365 if (phy) { 2366 flush_work(&pl->resolve); 2367 phy_disconnect(phy); 2368 } 2369 } 2370 EXPORT_SYMBOL_GPL(phylink_disconnect_phy); 2371 2372 static void phylink_link_changed(struct phylink *pl, bool up, const char *what) 2373 { 2374 if (!up) 2375 pl->link_failed = true; 2376 phylink_run_resolve(pl); 2377 phylink_dbg(pl, "%s link %s\n", what, up ? "up" : "down"); 2378 } 2379 2380 /** 2381 * phylink_mac_change() - notify phylink of a change in MAC state 2382 * @pl: a pointer to a &struct phylink returned from phylink_create() 2383 * @up: indicates whether the link is currently up. 2384 * 2385 * The MAC driver should call this driver when the state of its link 2386 * changes (eg, link failure, new negotiation results, etc.) 2387 */ 2388 void phylink_mac_change(struct phylink *pl, bool up) 2389 { 2390 phylink_link_changed(pl, up, "mac"); 2391 } 2392 EXPORT_SYMBOL_GPL(phylink_mac_change); 2393 2394 /** 2395 * phylink_pcs_change() - notify phylink of a change to PCS link state 2396 * @pcs: pointer to &struct phylink_pcs 2397 * @up: indicates whether the link is currently up. 2398 * 2399 * The PCS driver should call this when the state of its link changes 2400 * (e.g. link failure, new negotiation results, etc.) Note: it should 2401 * not determine "up" by reading the BMSR. If in doubt about the link 2402 * state at interrupt time, then pass true if pcs_get_state() returns 2403 * the latched link-down state, otherwise pass false. 2404 */ 2405 void phylink_pcs_change(struct phylink_pcs *pcs, bool up) 2406 { 2407 struct phylink *pl = pcs->phylink; 2408 2409 if (pl) 2410 phylink_link_changed(pl, up, "pcs"); 2411 } 2412 EXPORT_SYMBOL_GPL(phylink_pcs_change); 2413 2414 static irqreturn_t phylink_link_handler(int irq, void *data) 2415 { 2416 struct phylink *pl = data; 2417 2418 phylink_run_resolve(pl); 2419 2420 return IRQ_HANDLED; 2421 } 2422 2423 /** 2424 * phylink_start() - start a phylink instance 2425 * @pl: a pointer to a &struct phylink returned from phylink_create() 2426 * 2427 * Start the phylink instance specified by @pl, configuring the MAC for the 2428 * desired link mode(s) and negotiation style. This should be called from the 2429 * network device driver's &struct net_device_ops ndo_open() method. 2430 */ 2431 void phylink_start(struct phylink *pl) 2432 { 2433 bool poll = false; 2434 2435 ASSERT_RTNL(); 2436 2437 phylink_info(pl, "configuring for %s/%s link mode\n", 2438 phylink_an_mode_str(pl->req_link_an_mode), 2439 phy_modes(pl->link_config.interface)); 2440 2441 /* Always set the carrier off */ 2442 if (pl->netdev) 2443 netif_carrier_off(pl->netdev); 2444 2445 pl->pcs_state = PCS_STATE_STARTING; 2446 2447 /* Apply the link configuration to the MAC when starting. This allows 2448 * a fixed-link to start with the correct parameters, and also 2449 * ensures that we set the appropriate advertisement for Serdes links. 2450 * 2451 * Restart autonegotiation if using 802.3z to ensure that the link 2452 * parameters are properly negotiated. This is necessary for DSA 2453 * switches using 802.3z negotiation to ensure they see our modes. 2454 */ 2455 phylink_mac_initial_config(pl, true); 2456 2457 pl->pcs_state = PCS_STATE_STARTED; 2458 2459 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_STOPPED); 2460 2461 if (pl->cfg_link_an_mode == MLO_AN_FIXED && pl->link_gpio) { 2462 int irq = gpiod_to_irq(pl->link_gpio); 2463 2464 if (irq > 0) { 2465 if (!request_irq(irq, phylink_link_handler, 2466 IRQF_TRIGGER_RISING | 2467 IRQF_TRIGGER_FALLING, 2468 "netdev link", pl)) 2469 pl->link_irq = irq; 2470 else 2471 irq = 0; 2472 } 2473 if (irq <= 0) 2474 poll = true; 2475 } 2476 2477 if (pl->cfg_link_an_mode == MLO_AN_FIXED) 2478 poll |= pl->config->poll_fixed_state; 2479 2480 if (poll) 2481 mod_timer(&pl->link_poll, jiffies + HZ); 2482 if (pl->phydev) 2483 phy_start(pl->phydev); 2484 if (pl->sfp_bus) 2485 sfp_upstream_start(pl->sfp_bus); 2486 } 2487 EXPORT_SYMBOL_GPL(phylink_start); 2488 2489 /** 2490 * phylink_stop() - stop a phylink instance 2491 * @pl: a pointer to a &struct phylink returned from phylink_create() 2492 * 2493 * Stop the phylink instance specified by @pl. This should be called from the 2494 * network device driver's &struct net_device_ops ndo_stop() method. The 2495 * network device's carrier state should not be changed prior to calling this 2496 * function. 2497 * 2498 * This will synchronously bring down the link if the link is not already 2499 * down (in other words, it will trigger a mac_link_down() method call.) 2500 */ 2501 void phylink_stop(struct phylink *pl) 2502 { 2503 ASSERT_RTNL(); 2504 2505 if (pl->sfp_bus) 2506 sfp_upstream_stop(pl->sfp_bus); 2507 if (pl->phydev) 2508 phy_stop(pl->phydev); 2509 timer_delete_sync(&pl->link_poll); 2510 if (pl->link_irq) { 2511 free_irq(pl->link_irq, pl); 2512 pl->link_irq = 0; 2513 } 2514 2515 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED); 2516 2517 pl->pcs_state = PCS_STATE_DOWN; 2518 2519 phylink_pcs_disable(pl->pcs); 2520 } 2521 EXPORT_SYMBOL_GPL(phylink_stop); 2522 2523 /** 2524 * phylink_rx_clk_stop_block() - block PHY ability to stop receive clock in LPI 2525 * @pl: a pointer to a &struct phylink returned from phylink_create() 2526 * 2527 * Disable the PHY's ability to stop the receive clock while the receive path 2528 * is in EEE LPI state, until the number of calls to phylink_rx_clk_stop_block() 2529 * are balanced by calls to phylink_rx_clk_stop_unblock(). 2530 */ 2531 void phylink_rx_clk_stop_block(struct phylink *pl) 2532 { 2533 ASSERT_RTNL(); 2534 2535 if (pl->mac_rx_clk_stop_blocked == U8_MAX) { 2536 phylink_warn(pl, "%s called too many times - ignoring\n", 2537 __func__); 2538 dump_stack(); 2539 return; 2540 } 2541 2542 /* Disable PHY receive clock stop if this is the first time this 2543 * function has been called and clock-stop was previously enabled. 2544 */ 2545 if (pl->mac_rx_clk_stop_blocked++ == 0 && 2546 pl->mac_supports_eee_ops && pl->phydev && 2547 pl->config->eee_rx_clk_stop_enable) 2548 phy_eee_rx_clock_stop(pl->phydev, false); 2549 } 2550 EXPORT_SYMBOL_GPL(phylink_rx_clk_stop_block); 2551 2552 /** 2553 * phylink_rx_clk_stop_unblock() - unblock PHY ability to stop receive clock 2554 * @pl: a pointer to a &struct phylink returned from phylink_create() 2555 * 2556 * All calls to phylink_rx_clk_stop_block() must be balanced with a 2557 * corresponding call to phylink_rx_clk_stop_unblock() to restore the PHYs 2558 * ability to stop the receive clock when the receive path is in EEE LPI mode. 2559 */ 2560 void phylink_rx_clk_stop_unblock(struct phylink *pl) 2561 { 2562 ASSERT_RTNL(); 2563 2564 if (pl->mac_rx_clk_stop_blocked == 0) { 2565 phylink_warn(pl, "%s called too many times - ignoring\n", 2566 __func__); 2567 dump_stack(); 2568 return; 2569 } 2570 2571 /* Re-enable PHY receive clock stop if the number of unblocks matches 2572 * the number of calls to the block function above. 2573 */ 2574 if (--pl->mac_rx_clk_stop_blocked == 0 && 2575 pl->mac_supports_eee_ops && pl->phydev && 2576 pl->config->eee_rx_clk_stop_enable) 2577 phy_eee_rx_clock_stop(pl->phydev, true); 2578 } 2579 EXPORT_SYMBOL_GPL(phylink_rx_clk_stop_unblock); 2580 2581 static bool phylink_mac_supports_wol(struct phylink *pl) 2582 { 2583 return !!pl->mac_ops->mac_wol_set; 2584 } 2585 2586 static bool phylink_phy_supports_wol(struct phylink *pl, 2587 struct phy_device *phydev) 2588 { 2589 return phydev && (pl->config->wol_phy_legacy || phy_can_wakeup(phydev)); 2590 } 2591 2592 static bool phylink_phy_pm_speed_ctrl(struct phylink *pl) 2593 { 2594 return pl->config->wol_phy_speed_ctrl && !pl->wolopts_mac && 2595 pl->phydev && phy_may_wakeup(pl->phydev); 2596 } 2597 2598 /** 2599 * phylink_suspend() - handle a network device suspend event 2600 * @pl: a pointer to a &struct phylink returned from phylink_create() 2601 * @mac_wol: true if the MAC needs to receive packets for Wake-on-Lan 2602 * 2603 * Handle a network device suspend event. There are several cases: 2604 * 2605 * - If Wake-on-Lan is not active, we can bring down the link between 2606 * the MAC and PHY by calling phylink_stop(). 2607 * - If Wake-on-Lan is active, and being handled only by the PHY, we 2608 * can also bring down the link between the MAC and PHY. 2609 * - If Wake-on-Lan is active, but being handled by the MAC, the MAC 2610 * still needs to receive packets, so we can not bring the link down. 2611 * 2612 * Note: when phylink managed Wake-on-Lan is in use, @mac_wol is ignored. 2613 * (struct phylink_mac_ops.mac_set_wol populated.) 2614 */ 2615 void phylink_suspend(struct phylink *pl, bool mac_wol) 2616 { 2617 ASSERT_RTNL(); 2618 2619 if (phylink_mac_supports_wol(pl)) 2620 mac_wol = !!pl->wolopts_mac; 2621 2622 if (mac_wol && (!pl->netdev || pl->netdev->ethtool->wol_enabled)) { 2623 /* Wake-on-Lan enabled, MAC handling */ 2624 mutex_lock(&pl->state_mutex); 2625 2626 /* Stop the resolver bringing the link up */ 2627 __set_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state); 2628 2629 pl->suspend_link_up = phylink_link_is_up(pl); 2630 if (pl->suspend_link_up) { 2631 /* Disable the carrier, to prevent transmit timeouts, 2632 * but one would hope all packets have been sent. This 2633 * also means phylink_resolve() will do nothing. 2634 */ 2635 if (pl->netdev) 2636 netif_carrier_off(pl->netdev); 2637 pl->old_link_state = false; 2638 } 2639 2640 /* We do not call mac_link_down() here as we want the 2641 * link to remain up to receive the WoL packets. 2642 */ 2643 mutex_unlock(&pl->state_mutex); 2644 } else { 2645 phylink_stop(pl); 2646 } 2647 2648 if (phylink_phy_pm_speed_ctrl(pl)) 2649 phylink_speed_down(pl, false); 2650 } 2651 EXPORT_SYMBOL_GPL(phylink_suspend); 2652 2653 /** 2654 * phylink_prepare_resume() - prepare to resume a network device 2655 * @pl: a pointer to a &struct phylink returned from phylink_create() 2656 * 2657 * Optional, but if called must be called prior to phylink_resume(). 2658 * 2659 * Prepare to resume a network device, preparing the PHY as necessary. 2660 */ 2661 void phylink_prepare_resume(struct phylink *pl) 2662 { 2663 struct phy_device *phydev = pl->phydev; 2664 2665 ASSERT_RTNL(); 2666 2667 /* IEEE 802.3 22.2.4.1.5 allows PHYs to stop their receive clock 2668 * when PDOWN is set. However, some MACs require RXC to be running 2669 * in order to resume. If the MAC requires RXC, and we have a PHY, 2670 * then resume the PHY. Note that 802.3 allows PHYs 500ms before 2671 * the clock meets requirements. We do not implement this delay. 2672 */ 2673 if (pl->config->mac_requires_rxc && phydev && phydev->suspended) 2674 phy_resume(phydev); 2675 } 2676 EXPORT_SYMBOL_GPL(phylink_prepare_resume); 2677 2678 /** 2679 * phylink_resume() - handle a network device resume event 2680 * @pl: a pointer to a &struct phylink returned from phylink_create() 2681 * 2682 * Undo the effects of phylink_suspend(), returning the link to an 2683 * operational state. 2684 */ 2685 void phylink_resume(struct phylink *pl) 2686 { 2687 ASSERT_RTNL(); 2688 2689 if (phylink_phy_pm_speed_ctrl(pl)) 2690 phylink_speed_up(pl); 2691 2692 if (test_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state)) { 2693 /* Wake-on-Lan enabled, MAC handling */ 2694 2695 if (pl->suspend_link_up) { 2696 /* Call mac_link_down() so we keep the overall state 2697 * balanced. Do this under the state_mutex lock for 2698 * consistency. This will cause a "Link Down" message 2699 * to be printed during resume, which is harmless - 2700 * the true link state will be printed when we run a 2701 * resolve. 2702 */ 2703 mutex_lock(&pl->state_mutex); 2704 phylink_link_down(pl); 2705 mutex_unlock(&pl->state_mutex); 2706 } 2707 2708 /* Re-apply the link parameters so that all the settings get 2709 * restored to the MAC. 2710 */ 2711 phylink_mac_initial_config(pl, true); 2712 2713 /* Re-enable and re-resolve the link parameters */ 2714 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_MAC_WOL); 2715 } else { 2716 phylink_start(pl); 2717 } 2718 } 2719 EXPORT_SYMBOL_GPL(phylink_resume); 2720 2721 /** 2722 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY 2723 * @pl: a pointer to a &struct phylink returned from phylink_create() 2724 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters 2725 * 2726 * Read the wake on lan parameters from the PHY attached to the phylink 2727 * instance specified by @pl. If no PHY is currently attached, report no 2728 * support for wake on lan. 2729 */ 2730 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 2731 { 2732 ASSERT_RTNL(); 2733 2734 wol->supported = 0; 2735 wol->wolopts = 0; 2736 2737 if (phylink_mac_supports_wol(pl)) { 2738 if (phylink_phy_supports_wol(pl, pl->phydev)) 2739 phy_ethtool_get_wol(pl->phydev, wol); 2740 2741 /* Where the MAC augments the WoL support, merge its support and 2742 * current configuration. 2743 */ 2744 if (~wol->wolopts & pl->wolopts_mac & WAKE_MAGICSECURE) 2745 memcpy(wol->sopass, pl->wol_sopass, 2746 sizeof(wol->sopass)); 2747 2748 wol->supported |= pl->config->wol_mac_support; 2749 wol->wolopts |= pl->wolopts_mac; 2750 } else { 2751 /* Legacy */ 2752 if (pl->phydev) 2753 phy_ethtool_get_wol(pl->phydev, wol); 2754 } 2755 } 2756 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol); 2757 2758 /** 2759 * phylink_ethtool_set_wol() - set wake on lan parameters 2760 * @pl: a pointer to a &struct phylink returned from phylink_create() 2761 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters 2762 * 2763 * Set the wake on lan parameters for the PHY attached to the phylink 2764 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP 2765 * error. 2766 * 2767 * Returns zero on success or negative errno code. 2768 */ 2769 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 2770 { 2771 struct ethtool_wolinfo w = { .cmd = ETHTOOL_GWOL }; 2772 int ret = -EOPNOTSUPP; 2773 bool changed; 2774 u32 wolopts; 2775 2776 ASSERT_RTNL(); 2777 2778 if (phylink_mac_supports_wol(pl)) { 2779 wolopts = wol->wolopts; 2780 2781 if (phylink_phy_supports_wol(pl, pl->phydev)) { 2782 ret = phy_ethtool_set_wol(pl->phydev, wol); 2783 if (ret != 0 && ret != -EOPNOTSUPP) 2784 return ret; 2785 2786 phy_ethtool_get_wol(pl->phydev, &w); 2787 2788 /* Any Wake-on-Lan modes which the PHY is handling 2789 * should not be passed on to the MAC. 2790 */ 2791 wolopts &= ~w.wolopts; 2792 } 2793 2794 wolopts &= pl->config->wol_mac_support; 2795 changed = pl->wolopts_mac != wolopts; 2796 if (wolopts & WAKE_MAGICSECURE) 2797 changed |= !!memcmp(wol->sopass, pl->wol_sopass, 2798 sizeof(wol->sopass)); 2799 memcpy(pl->wol_sopass, wol->sopass, sizeof(pl->wol_sopass)); 2800 2801 if (changed) { 2802 ret = pl->mac_ops->mac_wol_set(pl->config, wolopts, 2803 wol->sopass); 2804 if (!ret) 2805 pl->wolopts_mac = wolopts; 2806 } else { 2807 ret = 0; 2808 } 2809 } else { 2810 if (pl->phydev) 2811 ret = phy_ethtool_set_wol(pl->phydev, wol); 2812 } 2813 2814 return ret; 2815 } 2816 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol); 2817 2818 static phy_interface_t phylink_sfp_select_interface(struct phylink *pl, 2819 const unsigned long *link_modes) 2820 { 2821 phy_interface_t interface; 2822 2823 interface = sfp_select_interface(pl->sfp_bus, link_modes); 2824 if (interface == PHY_INTERFACE_MODE_NA) { 2825 phylink_err(pl, 2826 "selection of interface failed, advertisement %*pb\n", 2827 __ETHTOOL_LINK_MODE_MASK_NBITS, 2828 link_modes); 2829 return interface; 2830 } 2831 2832 if (!test_bit(interface, pl->config->supported_interfaces)) { 2833 phylink_err(pl, 2834 "selection of interface failed, SFP selected %s (%u) but MAC supports %*pbl\n", 2835 phy_modes(interface), interface, 2836 (int)PHY_INTERFACE_MODE_MAX, 2837 pl->config->supported_interfaces); 2838 return PHY_INTERFACE_MODE_NA; 2839 } 2840 2841 return interface; 2842 } 2843 2844 static phy_interface_t phylink_sfp_select_interface_speed(struct phylink *pl, 2845 u32 speed) 2846 { 2847 phy_interface_t best_interface = PHY_INTERFACE_MODE_NA; 2848 phy_interface_t interface; 2849 u32 max_speed; 2850 int i; 2851 2852 for (i = 0; i < ARRAY_SIZE(phylink_sfp_interface_preference); i++) { 2853 interface = phylink_sfp_interface_preference[i]; 2854 if (!test_bit(interface, pl->sfp_interfaces)) 2855 continue; 2856 2857 max_speed = phylink_interface_max_speed(interface); 2858 2859 /* The logic here is: if speed == max_speed, then we've found 2860 * the best interface. Otherwise we find the interface that 2861 * can just support the requested speed. 2862 */ 2863 if (max_speed >= speed) 2864 best_interface = interface; 2865 2866 if (max_speed <= speed) 2867 break; 2868 } 2869 2870 if (best_interface == PHY_INTERFACE_MODE_NA) 2871 phylink_err(pl, "selection of interface failed, speed %u\n", 2872 speed); 2873 2874 return best_interface; 2875 } 2876 2877 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b) 2878 { 2879 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask); 2880 2881 linkmode_zero(mask); 2882 phylink_set_port_modes(mask); 2883 2884 linkmode_and(dst, dst, mask); 2885 linkmode_or(dst, dst, b); 2886 } 2887 2888 static void phylink_get_ksettings(const struct phylink_link_state *state, 2889 struct ethtool_link_ksettings *kset) 2890 { 2891 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising); 2892 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising); 2893 if (kset->base.rate_matching == RATE_MATCH_NONE) { 2894 kset->base.speed = state->speed; 2895 kset->base.duplex = state->duplex; 2896 } 2897 kset->base.autoneg = linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2898 state->advertising) ? 2899 AUTONEG_ENABLE : AUTONEG_DISABLE; 2900 } 2901 2902 /** 2903 * phylink_ethtool_ksettings_get() - get the current link settings 2904 * @pl: a pointer to a &struct phylink returned from phylink_create() 2905 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings 2906 * 2907 * Read the current link settings for the phylink instance specified by @pl. 2908 * This will be the link settings read from the MAC, PHY or fixed link 2909 * settings depending on the current negotiation mode. 2910 */ 2911 int phylink_ethtool_ksettings_get(struct phylink *pl, 2912 struct ethtool_link_ksettings *kset) 2913 { 2914 struct phylink_link_state link_state; 2915 2916 ASSERT_RTNL(); 2917 2918 if (pl->phydev) 2919 phy_ethtool_ksettings_get(pl->phydev, kset); 2920 else 2921 kset->base.port = pl->link_port; 2922 2923 linkmode_copy(kset->link_modes.supported, pl->supported); 2924 2925 switch (pl->act_link_an_mode) { 2926 case MLO_AN_FIXED: 2927 /* We are using fixed settings. Report these as the 2928 * current link settings - and note that these also 2929 * represent the supported speeds/duplex/pause modes. 2930 */ 2931 phylink_get_fixed_state(pl, &link_state); 2932 phylink_get_ksettings(&link_state, kset); 2933 break; 2934 2935 case MLO_AN_INBAND: 2936 /* If there is a phy attached, then use the reported 2937 * settings from the phy with no modification. 2938 */ 2939 if (pl->phydev) 2940 break; 2941 2942 phylink_mac_pcs_get_state(pl, &link_state); 2943 2944 /* The MAC is reporting the link results from its own PCS 2945 * layer via in-band status. Report these as the current 2946 * link settings. 2947 */ 2948 phylink_get_ksettings(&link_state, kset); 2949 break; 2950 } 2951 2952 return 0; 2953 } 2954 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get); 2955 2956 static bool phylink_validate_pcs_inband_autoneg(struct phylink *pl, 2957 phy_interface_t interface, 2958 unsigned long *adv) 2959 { 2960 unsigned int inband = phylink_inband_caps(pl, interface); 2961 unsigned int mask; 2962 2963 /* If the PCS doesn't implement inband support, be permissive. */ 2964 if (!inband) 2965 return true; 2966 2967 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, adv)) 2968 mask = LINK_INBAND_ENABLE; 2969 else 2970 mask = LINK_INBAND_DISABLE; 2971 2972 /* Check whether the PCS implements the required mode */ 2973 return !!(inband & mask); 2974 } 2975 2976 /** 2977 * phylink_ethtool_ksettings_set() - set the link settings 2978 * @pl: a pointer to a &struct phylink returned from phylink_create() 2979 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes 2980 */ 2981 int phylink_ethtool_ksettings_set(struct phylink *pl, 2982 const struct ethtool_link_ksettings *kset) 2983 { 2984 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 2985 const struct link_capabilities *c; 2986 struct phylink_link_state config; 2987 2988 ASSERT_RTNL(); 2989 2990 if (pl->phydev) { 2991 struct ethtool_link_ksettings phy_kset = *kset; 2992 2993 linkmode_and(phy_kset.link_modes.advertising, 2994 phy_kset.link_modes.advertising, 2995 pl->supported); 2996 2997 /* We can rely on phylib for this update; we also do not need 2998 * to update the pl->link_config settings: 2999 * - the configuration returned via ksettings_get() will come 3000 * from phylib whenever a PHY is present. 3001 * - link_config.interface will be updated by the PHY calling 3002 * back via phylink_phy_change() and a subsequent resolve. 3003 * - initial link configuration for PHY mode comes from the 3004 * last phy state updated via phylink_phy_change(). 3005 * - other configuration changes (e.g. pause modes) are 3006 * performed directly via phylib. 3007 * - if in in-band mode with a PHY, the link configuration 3008 * is passed on the link from the PHY, and all of 3009 * link_config.{speed,duplex,an_enabled,pause} are not used. 3010 * - the only possible use would be link_config.advertising 3011 * pause modes when in 1000base-X mode with a PHY, but in 3012 * the presence of a PHY, this should not be changed as that 3013 * should be determined from the media side advertisement. 3014 */ 3015 return phy_ethtool_ksettings_set(pl->phydev, &phy_kset); 3016 } 3017 3018 config = pl->link_config; 3019 /* Mask out unsupported advertisements */ 3020 linkmode_and(config.advertising, kset->link_modes.advertising, 3021 pl->supported); 3022 3023 /* FIXME: should we reject autoneg if phy/mac does not support it? */ 3024 switch (kset->base.autoneg) { 3025 case AUTONEG_DISABLE: 3026 /* Autonegotiation disabled, select a suitable speed and 3027 * duplex. 3028 */ 3029 c = phy_caps_lookup(kset->base.speed, kset->base.duplex, 3030 pl->supported, false); 3031 if (!c) 3032 return -EINVAL; 3033 3034 /* If we have a fixed link, refuse to change link parameters. 3035 * If the link parameters match, accept them but do nothing. 3036 */ 3037 if (pl->req_link_an_mode == MLO_AN_FIXED) { 3038 if (c->speed != pl->link_config.speed || 3039 c->duplex != pl->link_config.duplex) 3040 return -EINVAL; 3041 return 0; 3042 } 3043 3044 config.speed = c->speed; 3045 config.duplex = c->duplex; 3046 break; 3047 3048 case AUTONEG_ENABLE: 3049 /* If we have a fixed link, allow autonegotiation (since that 3050 * is our default case) but do not allow the advertisement to 3051 * be changed. If the advertisement matches, simply return. 3052 */ 3053 if (pl->req_link_an_mode == MLO_AN_FIXED) { 3054 if (!linkmode_equal(config.advertising, 3055 pl->link_config.advertising)) 3056 return -EINVAL; 3057 return 0; 3058 } 3059 3060 config.speed = SPEED_UNKNOWN; 3061 config.duplex = DUPLEX_UNKNOWN; 3062 break; 3063 3064 default: 3065 return -EINVAL; 3066 } 3067 3068 /* We have ruled out the case with a PHY attached, and the 3069 * fixed-link cases. All that is left are in-band links. 3070 */ 3071 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising, 3072 kset->base.autoneg == AUTONEG_ENABLE); 3073 3074 /* If this link is with an SFP, ensure that changes to advertised modes 3075 * also cause the associated interface to be selected such that the 3076 * link can be configured correctly. 3077 */ 3078 if (pl->sfp_bus) { 3079 if (kset->base.autoneg == AUTONEG_ENABLE) 3080 config.interface = 3081 phylink_sfp_select_interface(pl, 3082 config.advertising); 3083 else 3084 config.interface = 3085 phylink_sfp_select_interface_speed(pl, 3086 config.speed); 3087 if (config.interface == PHY_INTERFACE_MODE_NA) 3088 return -EINVAL; 3089 3090 /* Revalidate with the selected interface */ 3091 linkmode_copy(support, pl->supported); 3092 if (phylink_validate(pl, support, &config)) { 3093 phylink_err(pl, "validation of %s/%s with support %*pb failed\n", 3094 phylink_an_mode_str(pl->req_link_an_mode), 3095 phy_modes(config.interface), 3096 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 3097 return -EINVAL; 3098 } 3099 } else { 3100 /* Validate without changing the current supported mask. */ 3101 linkmode_copy(support, pl->supported); 3102 if (phylink_validate(pl, support, &config)) 3103 return -EINVAL; 3104 } 3105 3106 /* If autonegotiation is enabled, we must have an advertisement */ 3107 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 3108 config.advertising) && 3109 phylink_is_empty_linkmode(config.advertising)) 3110 return -EINVAL; 3111 3112 /* Validate the autonegotiation state. We don't have a PHY in this 3113 * situation, so the PCS is the media-facing entity. 3114 */ 3115 if (!phylink_validate_pcs_inband_autoneg(pl, config.interface, 3116 config.advertising)) 3117 return -EINVAL; 3118 3119 mutex_lock(&pl->state_mutex); 3120 pl->link_config.speed = config.speed; 3121 pl->link_config.duplex = config.duplex; 3122 3123 if (pl->link_config.interface != config.interface) { 3124 /* The interface changed, e.g. 1000base-X <-> 2500base-X */ 3125 /* We need to force the link down, then change the interface */ 3126 if (pl->old_link_state) { 3127 phylink_link_down(pl); 3128 pl->old_link_state = false; 3129 } 3130 if (!test_bit(PHYLINK_DISABLE_STOPPED, 3131 &pl->phylink_disable_state)) 3132 phylink_major_config(pl, false, &config); 3133 pl->link_config.interface = config.interface; 3134 linkmode_copy(pl->link_config.advertising, config.advertising); 3135 } else if (!linkmode_equal(pl->link_config.advertising, 3136 config.advertising)) { 3137 linkmode_copy(pl->link_config.advertising, config.advertising); 3138 phylink_change_inband_advert(pl); 3139 } 3140 mutex_unlock(&pl->state_mutex); 3141 3142 return 0; 3143 } 3144 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set); 3145 3146 /** 3147 * phylink_ethtool_nway_reset() - restart negotiation 3148 * @pl: a pointer to a &struct phylink returned from phylink_create() 3149 * 3150 * Restart negotiation for the phylink instance specified by @pl. This will 3151 * cause any attached phy to restart negotiation with the link partner, and 3152 * if the MAC is in a BaseX mode, the MAC will also be requested to restart 3153 * negotiation. 3154 * 3155 * Returns zero on success, or negative error code. 3156 */ 3157 int phylink_ethtool_nway_reset(struct phylink *pl) 3158 { 3159 int ret = 0; 3160 3161 ASSERT_RTNL(); 3162 3163 if (pl->phydev) 3164 ret = phy_restart_aneg(pl->phydev); 3165 phylink_pcs_an_restart(pl); 3166 3167 return ret; 3168 } 3169 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset); 3170 3171 /** 3172 * phylink_ethtool_get_pauseparam() - get the current pause parameters 3173 * @pl: a pointer to a &struct phylink returned from phylink_create() 3174 * @pause: a pointer to a &struct ethtool_pauseparam 3175 */ 3176 void phylink_ethtool_get_pauseparam(struct phylink *pl, 3177 struct ethtool_pauseparam *pause) 3178 { 3179 ASSERT_RTNL(); 3180 3181 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN); 3182 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX); 3183 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX); 3184 } 3185 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam); 3186 3187 /** 3188 * phylink_ethtool_set_pauseparam() - set the current pause parameters 3189 * @pl: a pointer to a &struct phylink returned from phylink_create() 3190 * @pause: a pointer to a &struct ethtool_pauseparam 3191 */ 3192 int phylink_ethtool_set_pauseparam(struct phylink *pl, 3193 struct ethtool_pauseparam *pause) 3194 { 3195 struct phylink_link_state *config = &pl->link_config; 3196 bool manual_changed; 3197 int pause_state; 3198 3199 ASSERT_RTNL(); 3200 3201 if (pl->req_link_an_mode == MLO_AN_FIXED) 3202 return -EOPNOTSUPP; 3203 3204 if (!phylink_test(pl->supported, Pause) && 3205 !phylink_test(pl->supported, Asym_Pause)) 3206 return -EOPNOTSUPP; 3207 3208 if (!phylink_test(pl->supported, Asym_Pause) && 3209 pause->rx_pause != pause->tx_pause) 3210 return -EINVAL; 3211 3212 pause_state = 0; 3213 if (pause->autoneg) 3214 pause_state |= MLO_PAUSE_AN; 3215 if (pause->rx_pause) 3216 pause_state |= MLO_PAUSE_RX; 3217 if (pause->tx_pause) 3218 pause_state |= MLO_PAUSE_TX; 3219 3220 mutex_lock(&pl->state_mutex); 3221 /* 3222 * See the comments for linkmode_set_pause(), wrt the deficiencies 3223 * with the current implementation. A solution to this issue would 3224 * be: 3225 * ethtool Local device 3226 * rx tx Pause AsymDir 3227 * 0 0 0 0 3228 * 1 0 1 1 3229 * 0 1 0 1 3230 * 1 1 1 1 3231 * and then use the ethtool rx/tx enablement status to mask the 3232 * rx/tx pause resolution. 3233 */ 3234 linkmode_set_pause(config->advertising, pause->tx_pause, 3235 pause->rx_pause); 3236 3237 manual_changed = (config->pause ^ pause_state) & MLO_PAUSE_AN || 3238 (!(pause_state & MLO_PAUSE_AN) && 3239 (config->pause ^ pause_state) & MLO_PAUSE_TXRX_MASK); 3240 3241 config->pause = pause_state; 3242 3243 /* Update our in-band advertisement, triggering a renegotiation if 3244 * the advertisement changed. 3245 */ 3246 if (!pl->phydev) 3247 phylink_change_inband_advert(pl); 3248 3249 mutex_unlock(&pl->state_mutex); 3250 3251 /* If we have a PHY, a change of the pause frame advertisement will 3252 * cause phylib to renegotiate (if AN is enabled) which will in turn 3253 * call our phylink_phy_change() and trigger a resolve. Note that 3254 * we can't hold our state mutex while calling phy_set_asym_pause(). 3255 */ 3256 if (pl->phydev) 3257 phy_set_asym_pause(pl->phydev, pause->rx_pause, 3258 pause->tx_pause); 3259 3260 /* If the manual pause settings changed, make sure we trigger a 3261 * resolve to update their state; we can not guarantee that the 3262 * link will cycle. 3263 */ 3264 if (manual_changed) { 3265 pl->link_failed = true; 3266 phylink_run_resolve(pl); 3267 } 3268 3269 return 0; 3270 } 3271 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam); 3272 3273 /** 3274 * phylink_get_eee_err() - read the energy efficient ethernet error 3275 * counter 3276 * @pl: a pointer to a &struct phylink returned from phylink_create(). 3277 * 3278 * Read the Energy Efficient Ethernet error counter from the PHY associated 3279 * with the phylink instance specified by @pl. 3280 * 3281 * Returns positive error counter value, or negative error code. 3282 */ 3283 int phylink_get_eee_err(struct phylink *pl) 3284 { 3285 int ret = 0; 3286 3287 ASSERT_RTNL(); 3288 3289 if (pl->phydev) 3290 ret = phy_get_eee_err(pl->phydev); 3291 3292 return ret; 3293 } 3294 EXPORT_SYMBOL_GPL(phylink_get_eee_err); 3295 3296 /** 3297 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters 3298 * @pl: a pointer to a &struct phylink returned from phylink_create() 3299 * @eee: a pointer to a &struct ethtool_keee for the read parameters 3300 */ 3301 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_keee *eee) 3302 { 3303 int ret = -EOPNOTSUPP; 3304 3305 ASSERT_RTNL(); 3306 3307 if (pl->mac_supports_eee_ops && !pl->mac_supports_eee) 3308 return ret; 3309 3310 if (pl->phydev) { 3311 ret = phy_ethtool_get_eee(pl->phydev, eee); 3312 /* Restrict supported linkmode mask */ 3313 if (ret == 0 && pl->mac_supports_eee_ops) 3314 linkmode_and(eee->supported, eee->supported, 3315 pl->supported_lpi); 3316 } 3317 3318 return ret; 3319 } 3320 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee); 3321 3322 /** 3323 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters 3324 * @pl: a pointer to a &struct phylink returned from phylink_create() 3325 * @eee: a pointer to a &struct ethtool_keee for the desired parameters 3326 */ 3327 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_keee *eee) 3328 { 3329 bool mac_eee = pl->mac_supports_eee; 3330 int ret = -EOPNOTSUPP; 3331 3332 ASSERT_RTNL(); 3333 3334 phylink_dbg(pl, "mac %s phylink EEE%s, adv %*pbl, LPI%s timer %uus\n", 3335 mac_eee ? "supports" : "does not support", 3336 eee->eee_enabled ? ", enabled" : "", 3337 __ETHTOOL_LINK_MODE_MASK_NBITS, eee->advertised, 3338 eee->tx_lpi_enabled ? " enabled" : "", eee->tx_lpi_timer); 3339 3340 if (pl->mac_supports_eee_ops && !mac_eee) 3341 return ret; 3342 3343 if (pl->phydev) { 3344 /* Restrict advertisement mask */ 3345 if (pl->mac_supports_eee_ops) 3346 linkmode_and(eee->advertised, eee->advertised, 3347 pl->supported_lpi); 3348 ret = phy_ethtool_set_eee(pl->phydev, eee); 3349 if (ret == 0) 3350 eee_to_eeecfg(&pl->eee_cfg, eee); 3351 } 3352 3353 return ret; 3354 } 3355 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee); 3356 3357 /* This emulates MII registers for a fixed-mode phy operating as per the 3358 * passed in state. "aneg" defines if we report negotiation is possible. 3359 * 3360 * FIXME: should deal with negotiation state too. 3361 */ 3362 static int phylink_mii_emul_read(unsigned int reg, 3363 struct phylink_link_state *state) 3364 { 3365 struct fixed_phy_status fs; 3366 unsigned long *lpa = state->lp_advertising; 3367 int val; 3368 3369 fs.link = state->link; 3370 fs.speed = state->speed; 3371 fs.duplex = state->duplex; 3372 fs.pause = test_bit(ETHTOOL_LINK_MODE_Pause_BIT, lpa); 3373 fs.asym_pause = test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, lpa); 3374 3375 val = swphy_read_reg(reg, &fs); 3376 if (reg == MII_BMSR) { 3377 if (!state->an_complete) 3378 val &= ~BMSR_ANEGCOMPLETE; 3379 } 3380 return val; 3381 } 3382 3383 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id, 3384 unsigned int reg) 3385 { 3386 struct phy_device *phydev = pl->phydev; 3387 int prtad, devad; 3388 3389 if (mdio_phy_id_is_c45(phy_id)) { 3390 prtad = mdio_phy_id_prtad(phy_id); 3391 devad = mdio_phy_id_devad(phy_id); 3392 return mdiobus_c45_read(pl->phydev->mdio.bus, prtad, devad, 3393 reg); 3394 } 3395 3396 if (phydev->is_c45) { 3397 switch (reg) { 3398 case MII_BMCR: 3399 case MII_BMSR: 3400 case MII_PHYSID1: 3401 case MII_PHYSID2: 3402 devad = __ffs(phydev->c45_ids.mmds_present); 3403 break; 3404 case MII_ADVERTISE: 3405 case MII_LPA: 3406 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 3407 return -EINVAL; 3408 devad = MDIO_MMD_AN; 3409 if (reg == MII_ADVERTISE) 3410 reg = MDIO_AN_ADVERTISE; 3411 else 3412 reg = MDIO_AN_LPA; 3413 break; 3414 default: 3415 return -EINVAL; 3416 } 3417 prtad = phy_id; 3418 return mdiobus_c45_read(pl->phydev->mdio.bus, prtad, devad, 3419 reg); 3420 } 3421 3422 return mdiobus_read(pl->phydev->mdio.bus, phy_id, reg); 3423 } 3424 3425 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id, 3426 unsigned int reg, unsigned int val) 3427 { 3428 struct phy_device *phydev = pl->phydev; 3429 int prtad, devad; 3430 3431 if (mdio_phy_id_is_c45(phy_id)) { 3432 prtad = mdio_phy_id_prtad(phy_id); 3433 devad = mdio_phy_id_devad(phy_id); 3434 return mdiobus_c45_write(pl->phydev->mdio.bus, prtad, devad, 3435 reg, val); 3436 } 3437 3438 if (phydev->is_c45) { 3439 switch (reg) { 3440 case MII_BMCR: 3441 case MII_BMSR: 3442 case MII_PHYSID1: 3443 case MII_PHYSID2: 3444 devad = __ffs(phydev->c45_ids.mmds_present); 3445 break; 3446 case MII_ADVERTISE: 3447 case MII_LPA: 3448 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 3449 return -EINVAL; 3450 devad = MDIO_MMD_AN; 3451 if (reg == MII_ADVERTISE) 3452 reg = MDIO_AN_ADVERTISE; 3453 else 3454 reg = MDIO_AN_LPA; 3455 break; 3456 default: 3457 return -EINVAL; 3458 } 3459 return mdiobus_c45_write(pl->phydev->mdio.bus, phy_id, devad, 3460 reg, val); 3461 } 3462 3463 return mdiobus_write(phydev->mdio.bus, phy_id, reg, val); 3464 } 3465 3466 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id, 3467 unsigned int reg) 3468 { 3469 struct phylink_link_state state; 3470 int val = 0xffff; 3471 3472 switch (pl->act_link_an_mode) { 3473 case MLO_AN_FIXED: 3474 if (phy_id == 0) { 3475 phylink_get_fixed_state(pl, &state); 3476 val = phylink_mii_emul_read(reg, &state); 3477 } 3478 break; 3479 3480 case MLO_AN_PHY: 3481 return -EOPNOTSUPP; 3482 3483 case MLO_AN_INBAND: 3484 if (phy_id == 0) { 3485 phylink_mac_pcs_get_state(pl, &state); 3486 val = phylink_mii_emul_read(reg, &state); 3487 } 3488 break; 3489 } 3490 3491 return val & 0xffff; 3492 } 3493 3494 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id, 3495 unsigned int reg, unsigned int val) 3496 { 3497 switch (pl->act_link_an_mode) { 3498 case MLO_AN_FIXED: 3499 break; 3500 3501 case MLO_AN_PHY: 3502 return -EOPNOTSUPP; 3503 3504 case MLO_AN_INBAND: 3505 break; 3506 } 3507 3508 return 0; 3509 } 3510 3511 /** 3512 * phylink_mii_ioctl() - generic mii ioctl interface 3513 * @pl: a pointer to a &struct phylink returned from phylink_create() 3514 * @ifr: a pointer to a &struct ifreq for socket ioctls 3515 * @cmd: ioctl cmd to execute 3516 * 3517 * Perform the specified MII ioctl on the PHY attached to the phylink instance 3518 * specified by @pl. If no PHY is attached, emulate the presence of the PHY. 3519 * 3520 * Returns: zero on success or negative error code. 3521 * 3522 * %SIOCGMIIPHY: 3523 * read register from the current PHY. 3524 * %SIOCGMIIREG: 3525 * read register from the specified PHY. 3526 * %SIOCSMIIREG: 3527 * set a register on the specified PHY. 3528 */ 3529 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd) 3530 { 3531 struct mii_ioctl_data *mii = if_mii(ifr); 3532 int ret; 3533 3534 ASSERT_RTNL(); 3535 3536 if (pl->phydev) { 3537 /* PHYs only exist for MLO_AN_PHY and SGMII */ 3538 switch (cmd) { 3539 case SIOCGMIIPHY: 3540 mii->phy_id = pl->phydev->mdio.addr; 3541 fallthrough; 3542 3543 case SIOCGMIIREG: 3544 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num); 3545 if (ret >= 0) { 3546 mii->val_out = ret; 3547 ret = 0; 3548 } 3549 break; 3550 3551 case SIOCSMIIREG: 3552 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num, 3553 mii->val_in); 3554 break; 3555 3556 default: 3557 ret = phy_mii_ioctl(pl->phydev, ifr, cmd); 3558 break; 3559 } 3560 } else { 3561 switch (cmd) { 3562 case SIOCGMIIPHY: 3563 mii->phy_id = 0; 3564 fallthrough; 3565 3566 case SIOCGMIIREG: 3567 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num); 3568 if (ret >= 0) { 3569 mii->val_out = ret; 3570 ret = 0; 3571 } 3572 break; 3573 3574 case SIOCSMIIREG: 3575 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num, 3576 mii->val_in); 3577 break; 3578 3579 default: 3580 ret = -EOPNOTSUPP; 3581 break; 3582 } 3583 } 3584 3585 return ret; 3586 } 3587 EXPORT_SYMBOL_GPL(phylink_mii_ioctl); 3588 3589 /** 3590 * phylink_speed_down() - set the non-SFP PHY to lowest speed supported by both 3591 * link partners 3592 * @pl: a pointer to a &struct phylink returned from phylink_create() 3593 * @sync: perform action synchronously 3594 * 3595 * If we have a PHY that is not part of a SFP module, then set the speed 3596 * as described in the phy_speed_down() function. Please see this function 3597 * for a description of the @sync parameter. 3598 * 3599 * Returns zero if there is no PHY, otherwise as per phy_speed_down(). 3600 */ 3601 int phylink_speed_down(struct phylink *pl, bool sync) 3602 { 3603 int ret = 0; 3604 3605 ASSERT_RTNL(); 3606 3607 if (!pl->sfp_bus && pl->phydev) 3608 ret = phy_speed_down(pl->phydev, sync); 3609 3610 return ret; 3611 } 3612 EXPORT_SYMBOL_GPL(phylink_speed_down); 3613 3614 /** 3615 * phylink_speed_up() - restore the advertised speeds prior to the call to 3616 * phylink_speed_down() 3617 * @pl: a pointer to a &struct phylink returned from phylink_create() 3618 * 3619 * If we have a PHY that is not part of a SFP module, then restore the 3620 * PHY speeds as per phy_speed_up(). 3621 * 3622 * Returns zero if there is no PHY, otherwise as per phy_speed_up(). 3623 */ 3624 int phylink_speed_up(struct phylink *pl) 3625 { 3626 int ret = 0; 3627 3628 ASSERT_RTNL(); 3629 3630 if (!pl->sfp_bus && pl->phydev) 3631 ret = phy_speed_up(pl->phydev); 3632 3633 return ret; 3634 } 3635 EXPORT_SYMBOL_GPL(phylink_speed_up); 3636 3637 static void phylink_sfp_attach(void *upstream, struct sfp_bus *bus) 3638 { 3639 struct phylink *pl = upstream; 3640 3641 pl->netdev->sfp_bus = bus; 3642 } 3643 3644 static void phylink_sfp_detach(void *upstream, struct sfp_bus *bus) 3645 { 3646 struct phylink *pl = upstream; 3647 3648 pl->netdev->sfp_bus = NULL; 3649 } 3650 3651 static phy_interface_t phylink_choose_sfp_interface(struct phylink *pl, 3652 const unsigned long *intf) 3653 { 3654 phy_interface_t interface; 3655 size_t i; 3656 3657 interface = PHY_INTERFACE_MODE_NA; 3658 for (i = 0; i < ARRAY_SIZE(phylink_sfp_interface_preference); i++) 3659 if (test_bit(phylink_sfp_interface_preference[i], intf)) { 3660 interface = phylink_sfp_interface_preference[i]; 3661 break; 3662 } 3663 3664 return interface; 3665 } 3666 3667 static void phylink_sfp_set_config(struct phylink *pl, unsigned long *supported, 3668 struct phylink_link_state *state, 3669 bool changed) 3670 { 3671 u8 mode = MLO_AN_INBAND; 3672 3673 phylink_dbg(pl, "requesting link mode %s/%s with support %*pb\n", 3674 phylink_an_mode_str(mode), phy_modes(state->interface), 3675 __ETHTOOL_LINK_MODE_MASK_NBITS, supported); 3676 3677 if (!linkmode_equal(pl->supported, supported)) { 3678 linkmode_copy(pl->supported, supported); 3679 changed = true; 3680 } 3681 3682 if (!linkmode_equal(pl->link_config.advertising, state->advertising)) { 3683 linkmode_copy(pl->link_config.advertising, state->advertising); 3684 changed = true; 3685 } 3686 3687 if (pl->req_link_an_mode != mode || 3688 pl->link_config.interface != state->interface) { 3689 pl->req_link_an_mode = mode; 3690 pl->link_config.interface = state->interface; 3691 3692 changed = true; 3693 3694 phylink_info(pl, "switched to %s/%s link mode\n", 3695 phylink_an_mode_str(mode), 3696 phy_modes(state->interface)); 3697 } 3698 3699 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED, 3700 &pl->phylink_disable_state)) 3701 phylink_mac_initial_config(pl, false); 3702 } 3703 3704 static int phylink_sfp_config_phy(struct phylink *pl, struct phy_device *phy) 3705 { 3706 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 3707 struct phylink_link_state config; 3708 int ret; 3709 3710 /* We're not using pl->sfp_interfaces, so clear it. */ 3711 phy_interface_zero(pl->sfp_interfaces); 3712 linkmode_copy(support, phy->supported); 3713 3714 memset(&config, 0, sizeof(config)); 3715 linkmode_copy(config.advertising, phy->advertising); 3716 config.interface = PHY_INTERFACE_MODE_NA; 3717 config.speed = SPEED_UNKNOWN; 3718 config.duplex = DUPLEX_UNKNOWN; 3719 config.pause = MLO_PAUSE_AN; 3720 3721 /* Ignore errors if we're expecting a PHY to attach later */ 3722 ret = phylink_validate(pl, support, &config); 3723 if (ret) { 3724 phylink_err(pl, "validation with support %*pb failed: %pe\n", 3725 __ETHTOOL_LINK_MODE_MASK_NBITS, support, 3726 ERR_PTR(ret)); 3727 return ret; 3728 } 3729 3730 config.interface = phylink_sfp_select_interface(pl, config.advertising); 3731 if (config.interface == PHY_INTERFACE_MODE_NA) 3732 return -EINVAL; 3733 3734 /* Attach the PHY so that the PHY is present when we do the major 3735 * configuration step. 3736 */ 3737 ret = phylink_attach_phy(pl, phy, config.interface); 3738 if (ret < 0) 3739 return ret; 3740 3741 /* This will validate the configuration for us. */ 3742 ret = phylink_bringup_phy(pl, phy, config.interface); 3743 if (ret < 0) { 3744 phy_detach(phy); 3745 return ret; 3746 } 3747 3748 pl->link_port = pl->sfp_port; 3749 3750 phylink_sfp_set_config(pl, support, &config, true); 3751 3752 return 0; 3753 } 3754 3755 static int phylink_sfp_config_optical(struct phylink *pl) 3756 { 3757 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 3758 struct phylink_link_state config; 3759 enum inband_type inband_type; 3760 phy_interface_t interface; 3761 int ret; 3762 3763 phylink_dbg(pl, "optical SFP: interfaces=[mac=%*pbl, sfp=%*pbl]\n", 3764 (int)PHY_INTERFACE_MODE_MAX, 3765 pl->config->supported_interfaces, 3766 (int)PHY_INTERFACE_MODE_MAX, 3767 pl->sfp_interfaces); 3768 3769 /* Find the union of the supported interfaces by the PCS/MAC and 3770 * the SFP module. 3771 */ 3772 phy_interface_and(pl->sfp_interfaces, pl->config->supported_interfaces, 3773 pl->sfp_interfaces); 3774 if (phy_interface_empty(pl->sfp_interfaces)) { 3775 phylink_err(pl, "unsupported SFP module: no common interface modes\n"); 3776 return -EINVAL; 3777 } 3778 3779 memset(&config, 0, sizeof(config)); 3780 linkmode_copy(support, pl->sfp_support); 3781 linkmode_copy(config.advertising, pl->sfp_support); 3782 config.speed = SPEED_UNKNOWN; 3783 config.duplex = DUPLEX_UNKNOWN; 3784 config.pause = MLO_PAUSE_AN; 3785 3786 /* For all the interfaces that are supported, reduce the sfp_support 3787 * mask to only those link modes that can be supported. 3788 */ 3789 ret = phylink_validate_mask(pl, NULL, pl->sfp_support, &config, 3790 pl->sfp_interfaces); 3791 if (ret) { 3792 phylink_err(pl, "unsupported SFP module: validation with support %*pb failed\n", 3793 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 3794 return ret; 3795 } 3796 3797 interface = phylink_choose_sfp_interface(pl, pl->sfp_interfaces); 3798 if (interface == PHY_INTERFACE_MODE_NA) { 3799 phylink_err(pl, "failed to select SFP interface\n"); 3800 return -EINVAL; 3801 } 3802 3803 phylink_dbg(pl, "optical SFP: chosen %s interface\n", 3804 phy_modes(interface)); 3805 3806 inband_type = phylink_get_inband_type(interface); 3807 if (inband_type == INBAND_NONE) { 3808 /* If this is the sole interface, and there is no inband 3809 * support, clear the advertising mask and Autoneg bit in 3810 * the support mask. Otherwise, just clear the Autoneg bit 3811 * in the advertising mask. 3812 */ 3813 if (phy_interface_weight(pl->sfp_interfaces) == 1) { 3814 linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 3815 pl->sfp_support); 3816 linkmode_zero(config.advertising); 3817 } else { 3818 linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 3819 config.advertising); 3820 } 3821 } 3822 3823 if (!phylink_validate_pcs_inband_autoneg(pl, interface, 3824 config.advertising)) { 3825 phylink_err(pl, "autoneg setting not compatible with PCS"); 3826 return -EINVAL; 3827 } 3828 3829 config.interface = interface; 3830 3831 /* Ignore errors if we're expecting a PHY to attach later */ 3832 ret = phylink_validate(pl, support, &config); 3833 if (ret) { 3834 phylink_err(pl, "validation with support %*pb failed: %pe\n", 3835 __ETHTOOL_LINK_MODE_MASK_NBITS, support, 3836 ERR_PTR(ret)); 3837 return ret; 3838 } 3839 3840 pl->link_port = pl->sfp_port; 3841 3842 phylink_sfp_set_config(pl, pl->sfp_support, &config, false); 3843 3844 return 0; 3845 } 3846 3847 static int phylink_sfp_module_insert(void *upstream, 3848 const struct sfp_eeprom_id *id) 3849 { 3850 const struct sfp_module_caps *caps; 3851 struct phylink *pl = upstream; 3852 3853 ASSERT_RTNL(); 3854 3855 caps = sfp_get_module_caps(pl->sfp_bus); 3856 phy_interface_copy(pl->sfp_interfaces, caps->interfaces); 3857 linkmode_copy(pl->sfp_support, caps->link_modes); 3858 pl->sfp_may_have_phy = caps->may_have_phy; 3859 pl->sfp_port = caps->port; 3860 3861 /* If this module may have a PHY connecting later, defer until later */ 3862 if (pl->sfp_may_have_phy) 3863 return 0; 3864 3865 return phylink_sfp_config_optical(pl); 3866 } 3867 3868 static void phylink_sfp_module_remove(void *upstream) 3869 { 3870 struct phylink *pl = upstream; 3871 3872 phy_interface_zero(pl->sfp_interfaces); 3873 } 3874 3875 static int phylink_sfp_module_start(void *upstream) 3876 { 3877 struct phylink *pl = upstream; 3878 3879 /* If this SFP module has a PHY, start the PHY now. */ 3880 if (pl->phydev) { 3881 phy_start(pl->phydev); 3882 return 0; 3883 } 3884 3885 /* If the module may have a PHY but we didn't detect one we 3886 * need to configure the MAC here. 3887 */ 3888 if (!pl->sfp_may_have_phy) 3889 return 0; 3890 3891 return phylink_sfp_config_optical(pl); 3892 } 3893 3894 static void phylink_sfp_module_stop(void *upstream) 3895 { 3896 struct phylink *pl = upstream; 3897 3898 /* If this SFP module has a PHY, stop it. */ 3899 if (pl->phydev) 3900 phy_stop(pl->phydev); 3901 } 3902 3903 static void phylink_sfp_link_down(void *upstream) 3904 { 3905 struct phylink *pl = upstream; 3906 3907 ASSERT_RTNL(); 3908 3909 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_LINK); 3910 } 3911 3912 static void phylink_sfp_link_up(void *upstream) 3913 { 3914 struct phylink *pl = upstream; 3915 3916 ASSERT_RTNL(); 3917 3918 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_LINK); 3919 } 3920 3921 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy) 3922 { 3923 struct phylink *pl = upstream; 3924 3925 if (!phy->drv) { 3926 phylink_err(pl, "PHY %s (id 0x%.8lx) has no driver loaded\n", 3927 phydev_name(phy), (unsigned long)phy->phy_id); 3928 phylink_err(pl, "Drivers which handle known common cases: CONFIG_BCM84881_PHY, CONFIG_MARVELL_PHY\n"); 3929 return -EINVAL; 3930 } 3931 3932 /* 3933 * This is the new way of dealing with flow control for PHYs, 3934 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 3935 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 3936 * using our validate call to the MAC, we rely upon the MAC 3937 * clearing the bits from both supported and advertising fields. 3938 */ 3939 phy_support_asym_pause(phy); 3940 3941 /* Set the PHY's host supported interfaces */ 3942 phy_interface_and(phy->host_interfaces, phylink_sfp_interfaces, 3943 pl->config->supported_interfaces); 3944 3945 /* Do the initial configuration */ 3946 return phylink_sfp_config_phy(pl, phy); 3947 } 3948 3949 static void phylink_sfp_disconnect_phy(void *upstream, 3950 struct phy_device *phydev) 3951 { 3952 phylink_disconnect_phy(upstream); 3953 } 3954 3955 static const struct sfp_upstream_ops sfp_phylink_ops = { 3956 .attach = phylink_sfp_attach, 3957 .detach = phylink_sfp_detach, 3958 .module_insert = phylink_sfp_module_insert, 3959 .module_remove = phylink_sfp_module_remove, 3960 .module_start = phylink_sfp_module_start, 3961 .module_stop = phylink_sfp_module_stop, 3962 .link_up = phylink_sfp_link_up, 3963 .link_down = phylink_sfp_link_down, 3964 .connect_phy = phylink_sfp_connect_phy, 3965 .disconnect_phy = phylink_sfp_disconnect_phy, 3966 }; 3967 3968 /* Helpers for MAC drivers */ 3969 3970 static struct { 3971 int bit; 3972 int speed; 3973 } phylink_c73_priority_resolution[] = { 3974 { ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT, SPEED_100000 }, 3975 { ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT, SPEED_100000 }, 3976 /* 100GBASE-KP4 and 100GBASE-CR10 not supported */ 3977 { ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT, SPEED_40000 }, 3978 { ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT, SPEED_40000 }, 3979 { ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, SPEED_10000 }, 3980 { ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, SPEED_10000 }, 3981 /* 5GBASE-KR not supported */ 3982 { ETHTOOL_LINK_MODE_2500baseX_Full_BIT, SPEED_2500 }, 3983 { ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, SPEED_1000 }, 3984 }; 3985 3986 void phylink_resolve_c73(struct phylink_link_state *state) 3987 { 3988 int i; 3989 3990 for (i = 0; i < ARRAY_SIZE(phylink_c73_priority_resolution); i++) { 3991 int bit = phylink_c73_priority_resolution[i].bit; 3992 if (linkmode_test_bit(bit, state->advertising) && 3993 linkmode_test_bit(bit, state->lp_advertising)) 3994 break; 3995 } 3996 3997 if (i < ARRAY_SIZE(phylink_c73_priority_resolution)) { 3998 state->speed = phylink_c73_priority_resolution[i].speed; 3999 state->duplex = DUPLEX_FULL; 4000 } else { 4001 /* negotiation failure */ 4002 state->link = false; 4003 } 4004 4005 phylink_resolve_an_pause(state); 4006 } 4007 EXPORT_SYMBOL_GPL(phylink_resolve_c73); 4008 4009 static void phylink_decode_c37_word(struct phylink_link_state *state, 4010 uint16_t config_reg, int speed) 4011 { 4012 int fd_bit; 4013 4014 if (speed == SPEED_2500) 4015 fd_bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT; 4016 else 4017 fd_bit = ETHTOOL_LINK_MODE_1000baseX_Full_BIT; 4018 4019 mii_lpa_mod_linkmode_x(state->lp_advertising, config_reg, fd_bit); 4020 4021 if (linkmode_test_bit(fd_bit, state->advertising) && 4022 linkmode_test_bit(fd_bit, state->lp_advertising)) { 4023 state->speed = speed; 4024 state->duplex = DUPLEX_FULL; 4025 } else { 4026 /* negotiation failure */ 4027 state->link = false; 4028 } 4029 4030 phylink_resolve_an_pause(state); 4031 } 4032 4033 static void phylink_decode_sgmii_word(struct phylink_link_state *state, 4034 uint16_t config_reg) 4035 { 4036 if (!(config_reg & LPA_SGMII_LINK)) { 4037 state->link = false; 4038 return; 4039 } 4040 4041 switch (config_reg & LPA_SGMII_SPD_MASK) { 4042 case LPA_SGMII_10: 4043 state->speed = SPEED_10; 4044 break; 4045 case LPA_SGMII_100: 4046 state->speed = SPEED_100; 4047 break; 4048 case LPA_SGMII_1000: 4049 state->speed = SPEED_1000; 4050 break; 4051 default: 4052 state->link = false; 4053 return; 4054 } 4055 if (config_reg & LPA_SGMII_FULL_DUPLEX) 4056 state->duplex = DUPLEX_FULL; 4057 else 4058 state->duplex = DUPLEX_HALF; 4059 } 4060 4061 /** 4062 * phylink_decode_usxgmii_word() - decode the USXGMII word from a MAC PCS 4063 * @state: a pointer to a struct phylink_link_state. 4064 * @lpa: a 16 bit value which stores the USXGMII auto-negotiation word 4065 * 4066 * Helper for MAC PCS supporting the USXGMII protocol and the auto-negotiation 4067 * code word. Decode the USXGMII code word and populate the corresponding fields 4068 * (speed, duplex) into the phylink_link_state structure. 4069 */ 4070 void phylink_decode_usxgmii_word(struct phylink_link_state *state, 4071 uint16_t lpa) 4072 { 4073 switch (lpa & MDIO_USXGMII_SPD_MASK) { 4074 case MDIO_USXGMII_10: 4075 state->speed = SPEED_10; 4076 break; 4077 case MDIO_USXGMII_100: 4078 state->speed = SPEED_100; 4079 break; 4080 case MDIO_USXGMII_1000: 4081 state->speed = SPEED_1000; 4082 break; 4083 case MDIO_USXGMII_2500: 4084 state->speed = SPEED_2500; 4085 break; 4086 case MDIO_USXGMII_5000: 4087 state->speed = SPEED_5000; 4088 break; 4089 case MDIO_USXGMII_10G: 4090 state->speed = SPEED_10000; 4091 break; 4092 default: 4093 state->link = false; 4094 return; 4095 } 4096 4097 if (lpa & MDIO_USXGMII_FULL_DUPLEX) 4098 state->duplex = DUPLEX_FULL; 4099 else 4100 state->duplex = DUPLEX_HALF; 4101 } 4102 EXPORT_SYMBOL_GPL(phylink_decode_usxgmii_word); 4103 4104 /** 4105 * phylink_decode_usgmii_word() - decode the USGMII word from a MAC PCS 4106 * @state: a pointer to a struct phylink_link_state. 4107 * @lpa: a 16 bit value which stores the USGMII auto-negotiation word 4108 * 4109 * Helper for MAC PCS supporting the USGMII protocol and the auto-negotiation 4110 * code word. Decode the USGMII code word and populate the corresponding fields 4111 * (speed, duplex) into the phylink_link_state structure. The structure for this 4112 * word is the same as the USXGMII word, except it only supports speeds up to 4113 * 1Gbps. 4114 */ 4115 static void phylink_decode_usgmii_word(struct phylink_link_state *state, 4116 uint16_t lpa) 4117 { 4118 switch (lpa & MDIO_USXGMII_SPD_MASK) { 4119 case MDIO_USXGMII_10: 4120 state->speed = SPEED_10; 4121 break; 4122 case MDIO_USXGMII_100: 4123 state->speed = SPEED_100; 4124 break; 4125 case MDIO_USXGMII_1000: 4126 state->speed = SPEED_1000; 4127 break; 4128 default: 4129 state->link = false; 4130 return; 4131 } 4132 4133 if (lpa & MDIO_USXGMII_FULL_DUPLEX) 4134 state->duplex = DUPLEX_FULL; 4135 else 4136 state->duplex = DUPLEX_HALF; 4137 } 4138 4139 /** 4140 * phylink_mii_c22_pcs_decode_state() - Decode MAC PCS state from MII registers 4141 * @state: a pointer to a &struct phylink_link_state. 4142 * @neg_mode: link negotiation mode (PHYLINK_PCS_NEG_xxx) 4143 * @bmsr: The value of the %MII_BMSR register 4144 * @lpa: The value of the %MII_LPA register 4145 * 4146 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 4147 * clause 37 negotiation and/or SGMII control. 4148 * 4149 * Parse the Clause 37 or Cisco SGMII link partner negotiation word into 4150 * the phylink @state structure. This is suitable to be used for implementing 4151 * the pcs_get_state() member of the struct phylink_pcs_ops structure if 4152 * accessing @bmsr and @lpa cannot be done with MDIO directly. 4153 */ 4154 void phylink_mii_c22_pcs_decode_state(struct phylink_link_state *state, 4155 unsigned int neg_mode, u16 bmsr, u16 lpa) 4156 { 4157 state->link = !!(bmsr & BMSR_LSTATUS); 4158 state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE); 4159 4160 /* If the link is down, the advertisement data is undefined. */ 4161 if (!state->link) 4162 return; 4163 4164 switch (state->interface) { 4165 case PHY_INTERFACE_MODE_1000BASEX: 4166 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) { 4167 phylink_decode_c37_word(state, lpa, SPEED_1000); 4168 } else { 4169 state->speed = SPEED_1000; 4170 state->duplex = DUPLEX_FULL; 4171 state->pause |= MLO_PAUSE_TX | MLO_PAUSE_RX; 4172 } 4173 break; 4174 4175 case PHY_INTERFACE_MODE_2500BASEX: 4176 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) { 4177 phylink_decode_c37_word(state, lpa, SPEED_2500); 4178 } else { 4179 state->speed = SPEED_2500; 4180 state->duplex = DUPLEX_FULL; 4181 state->pause |= MLO_PAUSE_TX | MLO_PAUSE_RX; 4182 } 4183 break; 4184 4185 case PHY_INTERFACE_MODE_SGMII: 4186 case PHY_INTERFACE_MODE_QSGMII: 4187 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) 4188 phylink_decode_sgmii_word(state, lpa); 4189 break; 4190 4191 case PHY_INTERFACE_MODE_QUSGMII: 4192 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) 4193 phylink_decode_usgmii_word(state, lpa); 4194 break; 4195 4196 default: 4197 state->link = false; 4198 break; 4199 } 4200 } 4201 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_decode_state); 4202 4203 /** 4204 * phylink_mii_c22_pcs_get_state() - read the MAC PCS state 4205 * @pcs: a pointer to a &struct mdio_device. 4206 * @neg_mode: link negotiation mode (PHYLINK_PCS_NEG_xxx) 4207 * @state: a pointer to a &struct phylink_link_state. 4208 * 4209 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 4210 * clause 37 negotiation and/or SGMII control. 4211 * 4212 * Read the MAC PCS state from the MII device configured in @config and 4213 * parse the Clause 37 or Cisco SGMII link partner negotiation word into 4214 * the phylink @state structure. This is suitable to be directly plugged 4215 * into the pcs_get_state() member of the struct phylink_pcs_ops 4216 * structure. 4217 */ 4218 void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs, 4219 unsigned int neg_mode, 4220 struct phylink_link_state *state) 4221 { 4222 int bmsr, lpa; 4223 4224 bmsr = mdiodev_read(pcs, MII_BMSR); 4225 lpa = mdiodev_read(pcs, MII_LPA); 4226 if (bmsr < 0 || lpa < 0) { 4227 state->link = false; 4228 return; 4229 } 4230 4231 phylink_mii_c22_pcs_decode_state(state, neg_mode, bmsr, lpa); 4232 } 4233 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_get_state); 4234 4235 /** 4236 * phylink_mii_c22_pcs_encode_advertisement() - configure the clause 37 PCS 4237 * advertisement 4238 * @interface: the PHY interface mode being configured 4239 * @advertising: the ethtool advertisement mask 4240 * 4241 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 4242 * clause 37 negotiation and/or SGMII control. 4243 * 4244 * Encode the clause 37 PCS advertisement as specified by @interface and 4245 * @advertising. 4246 * 4247 * Return: The new value for @adv, or ``-EINVAL`` if it should not be changed. 4248 */ 4249 int phylink_mii_c22_pcs_encode_advertisement(phy_interface_t interface, 4250 const unsigned long *advertising) 4251 { 4252 u16 adv; 4253 4254 switch (interface) { 4255 case PHY_INTERFACE_MODE_1000BASEX: 4256 case PHY_INTERFACE_MODE_2500BASEX: 4257 adv = ADVERTISE_1000XFULL; 4258 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 4259 advertising)) 4260 adv |= ADVERTISE_1000XPAUSE; 4261 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 4262 advertising)) 4263 adv |= ADVERTISE_1000XPSE_ASYM; 4264 return adv; 4265 case PHY_INTERFACE_MODE_SGMII: 4266 case PHY_INTERFACE_MODE_QSGMII: 4267 return 0x0001; 4268 default: 4269 /* Nothing to do for other modes */ 4270 return -EINVAL; 4271 } 4272 } 4273 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_encode_advertisement); 4274 4275 /** 4276 * phylink_mii_c22_pcs_config() - configure clause 22 PCS 4277 * @pcs: a pointer to a &struct mdio_device. 4278 * @interface: the PHY interface mode being configured 4279 * @advertising: the ethtool advertisement mask 4280 * @neg_mode: PCS negotiation mode 4281 * 4282 * Configure a Clause 22 PCS PHY with the appropriate negotiation 4283 * parameters for the @mode, @interface and @advertising parameters. 4284 * Returns negative error number on failure, zero if the advertisement 4285 * has not changed, or positive if there is a change. 4286 */ 4287 int phylink_mii_c22_pcs_config(struct mdio_device *pcs, 4288 phy_interface_t interface, 4289 const unsigned long *advertising, 4290 unsigned int neg_mode) 4291 { 4292 bool changed = 0; 4293 u16 bmcr; 4294 int ret, adv; 4295 4296 adv = phylink_mii_c22_pcs_encode_advertisement(interface, advertising); 4297 if (adv >= 0) { 4298 ret = mdiobus_modify_changed(pcs->bus, pcs->addr, 4299 MII_ADVERTISE, 0xffff, adv); 4300 if (ret < 0) 4301 return ret; 4302 changed = ret; 4303 } 4304 4305 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) 4306 bmcr = BMCR_ANENABLE; 4307 else 4308 bmcr = 0; 4309 4310 /* Configure the inband state. Ensure ISOLATE bit is disabled */ 4311 ret = mdiodev_modify(pcs, MII_BMCR, BMCR_ANENABLE | BMCR_ISOLATE, bmcr); 4312 if (ret < 0) 4313 return ret; 4314 4315 return changed; 4316 } 4317 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config); 4318 4319 /** 4320 * phylink_mii_c22_pcs_an_restart() - restart 802.3z autonegotiation 4321 * @pcs: a pointer to a &struct mdio_device. 4322 * 4323 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 4324 * clause 37 negotiation. 4325 * 4326 * Restart the clause 37 negotiation with the link partner. This is 4327 * suitable to be directly plugged into the pcs_get_state() member 4328 * of the struct phylink_pcs_ops structure. 4329 */ 4330 void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs) 4331 { 4332 int val = mdiodev_read(pcs, MII_BMCR); 4333 4334 if (val >= 0) { 4335 val |= BMCR_ANRESTART; 4336 4337 mdiodev_write(pcs, MII_BMCR, val); 4338 } 4339 } 4340 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_an_restart); 4341 4342 void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs, 4343 struct phylink_link_state *state) 4344 { 4345 struct mii_bus *bus = pcs->bus; 4346 int addr = pcs->addr; 4347 int stat; 4348 4349 stat = mdiobus_c45_read(bus, addr, MDIO_MMD_PCS, MDIO_STAT1); 4350 if (stat < 0) { 4351 state->link = false; 4352 return; 4353 } 4354 4355 state->link = !!(stat & MDIO_STAT1_LSTATUS); 4356 if (!state->link) 4357 return; 4358 4359 switch (state->interface) { 4360 case PHY_INTERFACE_MODE_10GBASER: 4361 state->speed = SPEED_10000; 4362 state->duplex = DUPLEX_FULL; 4363 break; 4364 4365 default: 4366 break; 4367 } 4368 } 4369 EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state); 4370 4371 /** 4372 * phylink_replay_link_begin() - begin replay of link callbacks for driver 4373 * which loses state 4374 * @pl: a pointer to a &struct phylink returned from phylink_create() 4375 * 4376 * Helper for MAC drivers which may perform a destructive reset at runtime. 4377 * Both the own driver's mac_link_down() method is called, as well as the 4378 * pcs_link_down() method of the split PCS (if any). 4379 * 4380 * This is similar to phylink_stop(), except it does not alter the state of 4381 * the phylib PHY (it is assumed that it is not affected by the MAC destructive 4382 * reset). 4383 */ 4384 void phylink_replay_link_begin(struct phylink *pl) 4385 { 4386 ASSERT_RTNL(); 4387 4388 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_REPLAY); 4389 } 4390 EXPORT_SYMBOL_GPL(phylink_replay_link_begin); 4391 4392 /** 4393 * phylink_replay_link_end() - end replay of link callbacks for driver 4394 * which lost state 4395 * @pl: a pointer to a &struct phylink returned from phylink_create() 4396 * 4397 * Helper for MAC drivers which may perform a destructive reset at runtime. 4398 * Both the own driver's mac_config() and mac_link_up() methods, as well as the 4399 * pcs_config() and pcs_link_up() method of the split PCS (if any), are called. 4400 * 4401 * This is similar to phylink_start(), except it does not alter the state of 4402 * the phylib PHY. 4403 * 4404 * One must call this method only within the same rtnl_lock() critical section 4405 * as a previous phylink_replay_link_start(). 4406 */ 4407 void phylink_replay_link_end(struct phylink *pl) 4408 { 4409 ASSERT_RTNL(); 4410 4411 if (WARN(!test_bit(PHYLINK_DISABLE_REPLAY, 4412 &pl->phylink_disable_state), 4413 "phylink_replay_link_end() called without a prior phylink_replay_link_begin()\n")) 4414 return; 4415 4416 pl->force_major_config = true; 4417 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_REPLAY); 4418 flush_work(&pl->resolve); 4419 } 4420 EXPORT_SYMBOL_GPL(phylink_replay_link_end); 4421 4422 static int __init phylink_init(void) 4423 { 4424 for (int i = 0; i < ARRAY_SIZE(phylink_sfp_interface_preference); ++i) 4425 __set_bit(phylink_sfp_interface_preference[i], 4426 phylink_sfp_interfaces); 4427 4428 return 0; 4429 } 4430 4431 module_init(phylink_init); 4432 4433 MODULE_LICENSE("GPL v2"); 4434 MODULE_DESCRIPTION("phylink models the MAC to optional PHY connection"); 4435