1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * phylink models the MAC to optional PHY connection, supporting 4 * technologies such as SFP cages where the PHY is hot-pluggable. 5 * 6 * Copyright (C) 2015 Russell King 7 */ 8 #include <linux/acpi.h> 9 #include <linux/ethtool.h> 10 #include <linux/export.h> 11 #include <linux/gpio/consumer.h> 12 #include <linux/netdevice.h> 13 #include <linux/of.h> 14 #include <linux/of_mdio.h> 15 #include <linux/phy.h> 16 #include <linux/phy_fixed.h> 17 #include <linux/phylink.h> 18 #include <linux/rtnetlink.h> 19 #include <linux/spinlock.h> 20 #include <linux/timer.h> 21 #include <linux/workqueue.h> 22 23 #include "sfp.h" 24 #include "swphy.h" 25 26 #define SUPPORTED_INTERFACES \ 27 (SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE | \ 28 SUPPORTED_BNC | SUPPORTED_AUI | SUPPORTED_Backplane) 29 #define ADVERTISED_INTERFACES \ 30 (ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \ 31 ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane) 32 33 enum { 34 PHYLINK_DISABLE_STOPPED, 35 PHYLINK_DISABLE_LINK, 36 PHYLINK_DISABLE_MAC_WOL, 37 }; 38 39 /** 40 * struct phylink - internal data type for phylink 41 */ 42 struct phylink { 43 /* private: */ 44 struct net_device *netdev; 45 const struct phylink_mac_ops *mac_ops; 46 const struct phylink_pcs_ops *pcs_ops; 47 struct phylink_config *config; 48 struct phylink_pcs *pcs; 49 struct device *dev; 50 unsigned int old_link_state:1; 51 52 unsigned long phylink_disable_state; /* bitmask of disables */ 53 struct phy_device *phydev; 54 phy_interface_t link_interface; /* PHY_INTERFACE_xxx */ 55 u8 cfg_link_an_mode; /* MLO_AN_xxx */ 56 u8 cur_link_an_mode; 57 u8 link_port; /* The current non-phy ethtool port */ 58 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 59 60 /* The link configuration settings */ 61 struct phylink_link_state link_config; 62 63 /* The current settings */ 64 phy_interface_t cur_interface; 65 66 struct gpio_desc *link_gpio; 67 unsigned int link_irq; 68 struct timer_list link_poll; 69 void (*get_fixed_state)(struct net_device *dev, 70 struct phylink_link_state *s); 71 72 struct mutex state_mutex; 73 struct phylink_link_state phy_state; 74 struct work_struct resolve; 75 76 bool mac_link_dropped; 77 78 struct sfp_bus *sfp_bus; 79 bool sfp_may_have_phy; 80 __ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support); 81 u8 sfp_port; 82 }; 83 84 #define phylink_printk(level, pl, fmt, ...) \ 85 do { \ 86 if ((pl)->config->type == PHYLINK_NETDEV) \ 87 netdev_printk(level, (pl)->netdev, fmt, ##__VA_ARGS__); \ 88 else if ((pl)->config->type == PHYLINK_DEV) \ 89 dev_printk(level, (pl)->dev, fmt, ##__VA_ARGS__); \ 90 } while (0) 91 92 #define phylink_err(pl, fmt, ...) \ 93 phylink_printk(KERN_ERR, pl, fmt, ##__VA_ARGS__) 94 #define phylink_warn(pl, fmt, ...) \ 95 phylink_printk(KERN_WARNING, pl, fmt, ##__VA_ARGS__) 96 #define phylink_info(pl, fmt, ...) \ 97 phylink_printk(KERN_INFO, pl, fmt, ##__VA_ARGS__) 98 #if defined(CONFIG_DYNAMIC_DEBUG) 99 #define phylink_dbg(pl, fmt, ...) \ 100 do { \ 101 if ((pl)->config->type == PHYLINK_NETDEV) \ 102 netdev_dbg((pl)->netdev, fmt, ##__VA_ARGS__); \ 103 else if ((pl)->config->type == PHYLINK_DEV) \ 104 dev_dbg((pl)->dev, fmt, ##__VA_ARGS__); \ 105 } while (0) 106 #elif defined(DEBUG) 107 #define phylink_dbg(pl, fmt, ...) \ 108 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__) 109 #else 110 #define phylink_dbg(pl, fmt, ...) \ 111 ({ \ 112 if (0) \ 113 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__); \ 114 }) 115 #endif 116 117 /** 118 * phylink_set_port_modes() - set the port type modes in the ethtool mask 119 * @mask: ethtool link mode mask 120 * 121 * Sets all the port type modes in the ethtool mask. MAC drivers should 122 * use this in their 'validate' callback. 123 */ 124 void phylink_set_port_modes(unsigned long *mask) 125 { 126 phylink_set(mask, TP); 127 phylink_set(mask, AUI); 128 phylink_set(mask, MII); 129 phylink_set(mask, FIBRE); 130 phylink_set(mask, BNC); 131 phylink_set(mask, Backplane); 132 } 133 EXPORT_SYMBOL_GPL(phylink_set_port_modes); 134 135 void phylink_set_10g_modes(unsigned long *mask) 136 { 137 phylink_set(mask, 10000baseT_Full); 138 phylink_set(mask, 10000baseCR_Full); 139 phylink_set(mask, 10000baseSR_Full); 140 phylink_set(mask, 10000baseLR_Full); 141 phylink_set(mask, 10000baseLRM_Full); 142 phylink_set(mask, 10000baseER_Full); 143 } 144 EXPORT_SYMBOL_GPL(phylink_set_10g_modes); 145 146 static int phylink_is_empty_linkmode(const unsigned long *linkmode) 147 { 148 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, }; 149 150 phylink_set_port_modes(tmp); 151 phylink_set(tmp, Autoneg); 152 phylink_set(tmp, Pause); 153 phylink_set(tmp, Asym_Pause); 154 155 return linkmode_subset(linkmode, tmp); 156 } 157 158 static const char *phylink_an_mode_str(unsigned int mode) 159 { 160 static const char *modestr[] = { 161 [MLO_AN_PHY] = "phy", 162 [MLO_AN_FIXED] = "fixed", 163 [MLO_AN_INBAND] = "inband", 164 }; 165 166 return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown"; 167 } 168 169 static void phylink_caps_to_linkmodes(unsigned long *linkmodes, 170 unsigned long caps) 171 { 172 if (caps & MAC_SYM_PAUSE) 173 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, linkmodes); 174 175 if (caps & MAC_ASYM_PAUSE) 176 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, linkmodes); 177 178 if (caps & MAC_10HD) 179 __set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, linkmodes); 180 181 if (caps & MAC_10FD) 182 __set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, linkmodes); 183 184 if (caps & MAC_100HD) { 185 __set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, linkmodes); 186 __set_bit(ETHTOOL_LINK_MODE_100baseFX_Half_BIT, linkmodes); 187 } 188 189 if (caps & MAC_100FD) { 190 __set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, linkmodes); 191 __set_bit(ETHTOOL_LINK_MODE_100baseT1_Full_BIT, linkmodes); 192 __set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT, linkmodes); 193 } 194 195 if (caps & MAC_1000HD) 196 __set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, linkmodes); 197 198 if (caps & MAC_1000FD) { 199 __set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, linkmodes); 200 __set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, linkmodes); 201 __set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, linkmodes); 202 __set_bit(ETHTOOL_LINK_MODE_1000baseT1_Full_BIT, linkmodes); 203 } 204 205 if (caps & MAC_2500FD) { 206 __set_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, linkmodes); 207 __set_bit(ETHTOOL_LINK_MODE_2500baseX_Full_BIT, linkmodes); 208 } 209 210 if (caps & MAC_5000FD) 211 __set_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT, linkmodes); 212 213 if (caps & MAC_10000FD) { 214 __set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, linkmodes); 215 __set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, linkmodes); 216 __set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, linkmodes); 217 __set_bit(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT, linkmodes); 218 __set_bit(ETHTOOL_LINK_MODE_10000baseCR_Full_BIT, linkmodes); 219 __set_bit(ETHTOOL_LINK_MODE_10000baseSR_Full_BIT, linkmodes); 220 __set_bit(ETHTOOL_LINK_MODE_10000baseLR_Full_BIT, linkmodes); 221 __set_bit(ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT, linkmodes); 222 __set_bit(ETHTOOL_LINK_MODE_10000baseER_Full_BIT, linkmodes); 223 } 224 225 if (caps & MAC_25000FD) { 226 __set_bit(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT, linkmodes); 227 __set_bit(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT, linkmodes); 228 __set_bit(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT, linkmodes); 229 } 230 231 if (caps & MAC_40000FD) { 232 __set_bit(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT, linkmodes); 233 __set_bit(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT, linkmodes); 234 __set_bit(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT, linkmodes); 235 __set_bit(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT, linkmodes); 236 } 237 238 if (caps & MAC_50000FD) { 239 __set_bit(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT, linkmodes); 240 __set_bit(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT, linkmodes); 241 __set_bit(ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT, linkmodes); 242 __set_bit(ETHTOOL_LINK_MODE_50000baseKR_Full_BIT, linkmodes); 243 __set_bit(ETHTOOL_LINK_MODE_50000baseSR_Full_BIT, linkmodes); 244 __set_bit(ETHTOOL_LINK_MODE_50000baseCR_Full_BIT, linkmodes); 245 __set_bit(ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT, 246 linkmodes); 247 __set_bit(ETHTOOL_LINK_MODE_50000baseDR_Full_BIT, linkmodes); 248 } 249 250 if (caps & MAC_56000FD) { 251 __set_bit(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT, linkmodes); 252 __set_bit(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT, linkmodes); 253 __set_bit(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT, linkmodes); 254 __set_bit(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT, linkmodes); 255 } 256 257 if (caps & MAC_100000FD) { 258 __set_bit(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT, linkmodes); 259 __set_bit(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT, linkmodes); 260 __set_bit(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT, linkmodes); 261 __set_bit(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT, 262 linkmodes); 263 __set_bit(ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT, linkmodes); 264 __set_bit(ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT, linkmodes); 265 __set_bit(ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT, linkmodes); 266 __set_bit(ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT, 267 linkmodes); 268 __set_bit(ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT, linkmodes); 269 __set_bit(ETHTOOL_LINK_MODE_100000baseKR_Full_BIT, linkmodes); 270 __set_bit(ETHTOOL_LINK_MODE_100000baseSR_Full_BIT, linkmodes); 271 __set_bit(ETHTOOL_LINK_MODE_100000baseLR_ER_FR_Full_BIT, 272 linkmodes); 273 __set_bit(ETHTOOL_LINK_MODE_100000baseCR_Full_BIT, linkmodes); 274 __set_bit(ETHTOOL_LINK_MODE_100000baseDR_Full_BIT, linkmodes); 275 } 276 277 if (caps & MAC_200000FD) { 278 __set_bit(ETHTOOL_LINK_MODE_200000baseKR4_Full_BIT, linkmodes); 279 __set_bit(ETHTOOL_LINK_MODE_200000baseSR4_Full_BIT, linkmodes); 280 __set_bit(ETHTOOL_LINK_MODE_200000baseLR4_ER4_FR4_Full_BIT, 281 linkmodes); 282 __set_bit(ETHTOOL_LINK_MODE_200000baseDR4_Full_BIT, linkmodes); 283 __set_bit(ETHTOOL_LINK_MODE_200000baseCR4_Full_BIT, linkmodes); 284 __set_bit(ETHTOOL_LINK_MODE_200000baseKR2_Full_BIT, linkmodes); 285 __set_bit(ETHTOOL_LINK_MODE_200000baseSR2_Full_BIT, linkmodes); 286 __set_bit(ETHTOOL_LINK_MODE_200000baseLR2_ER2_FR2_Full_BIT, 287 linkmodes); 288 __set_bit(ETHTOOL_LINK_MODE_200000baseDR2_Full_BIT, linkmodes); 289 __set_bit(ETHTOOL_LINK_MODE_200000baseCR2_Full_BIT, linkmodes); 290 } 291 292 if (caps & MAC_400000FD) { 293 __set_bit(ETHTOOL_LINK_MODE_400000baseKR8_Full_BIT, linkmodes); 294 __set_bit(ETHTOOL_LINK_MODE_400000baseSR8_Full_BIT, linkmodes); 295 __set_bit(ETHTOOL_LINK_MODE_400000baseLR8_ER8_FR8_Full_BIT, 296 linkmodes); 297 __set_bit(ETHTOOL_LINK_MODE_400000baseDR8_Full_BIT, linkmodes); 298 __set_bit(ETHTOOL_LINK_MODE_400000baseCR8_Full_BIT, linkmodes); 299 __set_bit(ETHTOOL_LINK_MODE_400000baseKR4_Full_BIT, linkmodes); 300 __set_bit(ETHTOOL_LINK_MODE_400000baseSR4_Full_BIT, linkmodes); 301 __set_bit(ETHTOOL_LINK_MODE_400000baseLR4_ER4_FR4_Full_BIT, 302 linkmodes); 303 __set_bit(ETHTOOL_LINK_MODE_400000baseDR4_Full_BIT, linkmodes); 304 __set_bit(ETHTOOL_LINK_MODE_400000baseCR4_Full_BIT, linkmodes); 305 } 306 } 307 308 /** 309 * phylink_get_linkmodes() - get acceptable link modes 310 * @linkmodes: ethtool linkmode mask (must be already initialised) 311 * @interface: phy interface mode defined by &typedef phy_interface_t 312 * @mac_capabilities: bitmask of MAC capabilities 313 * 314 * Set all possible pause, speed and duplex linkmodes in @linkmodes that 315 * are supported by the @interface mode and @mac_capabilities. @linkmodes 316 * must have been initialised previously. 317 */ 318 void phylink_get_linkmodes(unsigned long *linkmodes, phy_interface_t interface, 319 unsigned long mac_capabilities) 320 { 321 unsigned long caps = MAC_SYM_PAUSE | MAC_ASYM_PAUSE; 322 323 switch (interface) { 324 case PHY_INTERFACE_MODE_USXGMII: 325 caps |= MAC_10000FD | MAC_5000FD | MAC_2500FD; 326 fallthrough; 327 328 case PHY_INTERFACE_MODE_RGMII_TXID: 329 case PHY_INTERFACE_MODE_RGMII_RXID: 330 case PHY_INTERFACE_MODE_RGMII_ID: 331 case PHY_INTERFACE_MODE_RGMII: 332 case PHY_INTERFACE_MODE_QSGMII: 333 case PHY_INTERFACE_MODE_SGMII: 334 case PHY_INTERFACE_MODE_GMII: 335 caps |= MAC_1000HD | MAC_1000FD; 336 fallthrough; 337 338 case PHY_INTERFACE_MODE_REVRMII: 339 case PHY_INTERFACE_MODE_RMII: 340 case PHY_INTERFACE_MODE_SMII: 341 case PHY_INTERFACE_MODE_REVMII: 342 case PHY_INTERFACE_MODE_MII: 343 caps |= MAC_10HD | MAC_10FD; 344 fallthrough; 345 346 case PHY_INTERFACE_MODE_100BASEX: 347 caps |= MAC_100HD | MAC_100FD; 348 break; 349 350 case PHY_INTERFACE_MODE_TBI: 351 case PHY_INTERFACE_MODE_MOCA: 352 case PHY_INTERFACE_MODE_RTBI: 353 case PHY_INTERFACE_MODE_1000BASEX: 354 caps |= MAC_1000HD; 355 fallthrough; 356 case PHY_INTERFACE_MODE_TRGMII: 357 caps |= MAC_1000FD; 358 break; 359 360 case PHY_INTERFACE_MODE_2500BASEX: 361 caps |= MAC_2500FD; 362 break; 363 364 case PHY_INTERFACE_MODE_5GBASER: 365 caps |= MAC_5000FD; 366 break; 367 368 case PHY_INTERFACE_MODE_XGMII: 369 case PHY_INTERFACE_MODE_RXAUI: 370 case PHY_INTERFACE_MODE_XAUI: 371 case PHY_INTERFACE_MODE_10GBASER: 372 case PHY_INTERFACE_MODE_10GKR: 373 caps |= MAC_10000FD; 374 break; 375 376 case PHY_INTERFACE_MODE_25GBASER: 377 caps |= MAC_25000FD; 378 break; 379 380 case PHY_INTERFACE_MODE_XLGMII: 381 caps |= MAC_40000FD; 382 break; 383 384 case PHY_INTERFACE_MODE_INTERNAL: 385 caps |= ~0; 386 break; 387 388 case PHY_INTERFACE_MODE_NA: 389 case PHY_INTERFACE_MODE_MAX: 390 break; 391 } 392 393 phylink_caps_to_linkmodes(linkmodes, caps & mac_capabilities); 394 } 395 EXPORT_SYMBOL_GPL(phylink_get_linkmodes); 396 397 /** 398 * phylink_generic_validate() - generic validate() callback implementation 399 * @config: a pointer to a &struct phylink_config. 400 * @supported: ethtool bitmask for supported link modes. 401 * @state: a pointer to a &struct phylink_link_state. 402 * 403 * Generic implementation of the validate() callback that MAC drivers can 404 * use when they pass the range of supported interfaces and MAC capabilities. 405 * This makes use of phylink_get_linkmodes(). 406 */ 407 void phylink_generic_validate(struct phylink_config *config, 408 unsigned long *supported, 409 struct phylink_link_state *state) 410 { 411 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; 412 413 phylink_set_port_modes(mask); 414 phylink_set(mask, Autoneg); 415 phylink_get_linkmodes(mask, state->interface, config->mac_capabilities); 416 417 linkmode_and(supported, supported, mask); 418 linkmode_and(state->advertising, state->advertising, mask); 419 } 420 EXPORT_SYMBOL_GPL(phylink_generic_validate); 421 422 static int phylink_validate_mac_and_pcs(struct phylink *pl, 423 unsigned long *supported, 424 struct phylink_link_state *state) 425 { 426 struct phylink_pcs *pcs; 427 int ret; 428 429 /* Get the PCS for this interface mode */ 430 if (pl->mac_ops->mac_select_pcs) { 431 pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface); 432 if (IS_ERR(pcs)) 433 return PTR_ERR(pcs); 434 } else { 435 pcs = pl->pcs; 436 } 437 438 if (pcs) { 439 /* The PCS, if present, must be setup before phylink_create() 440 * has been called. If the ops is not initialised, print an 441 * error and backtrace rather than oopsing the kernel. 442 */ 443 if (!pcs->ops) { 444 phylink_err(pl, "interface %s: uninitialised PCS\n", 445 phy_modes(state->interface)); 446 dump_stack(); 447 return -EINVAL; 448 } 449 450 /* Validate the link parameters with the PCS */ 451 if (pcs->ops->pcs_validate) { 452 ret = pcs->ops->pcs_validate(pcs, supported, state); 453 if (ret < 0 || phylink_is_empty_linkmode(supported)) 454 return -EINVAL; 455 456 /* Ensure the advertising mask is a subset of the 457 * supported mask. 458 */ 459 linkmode_and(state->advertising, state->advertising, 460 supported); 461 } 462 } 463 464 /* Then validate the link parameters with the MAC */ 465 pl->mac_ops->validate(pl->config, supported, state); 466 467 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; 468 } 469 470 static int phylink_validate_any(struct phylink *pl, unsigned long *supported, 471 struct phylink_link_state *state) 472 { 473 __ETHTOOL_DECLARE_LINK_MODE_MASK(all_adv) = { 0, }; 474 __ETHTOOL_DECLARE_LINK_MODE_MASK(all_s) = { 0, }; 475 __ETHTOOL_DECLARE_LINK_MODE_MASK(s); 476 struct phylink_link_state t; 477 int intf; 478 479 for (intf = 0; intf < PHY_INTERFACE_MODE_MAX; intf++) { 480 if (test_bit(intf, pl->config->supported_interfaces)) { 481 linkmode_copy(s, supported); 482 483 t = *state; 484 t.interface = intf; 485 if (!phylink_validate_mac_and_pcs(pl, s, &t)) { 486 linkmode_or(all_s, all_s, s); 487 linkmode_or(all_adv, all_adv, t.advertising); 488 } 489 } 490 } 491 492 linkmode_copy(supported, all_s); 493 linkmode_copy(state->advertising, all_adv); 494 495 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; 496 } 497 498 static int phylink_validate(struct phylink *pl, unsigned long *supported, 499 struct phylink_link_state *state) 500 { 501 if (!phy_interface_empty(pl->config->supported_interfaces)) { 502 if (state->interface == PHY_INTERFACE_MODE_NA) 503 return phylink_validate_any(pl, supported, state); 504 505 if (!test_bit(state->interface, 506 pl->config->supported_interfaces)) 507 return -EINVAL; 508 } 509 510 return phylink_validate_mac_and_pcs(pl, supported, state); 511 } 512 513 static int phylink_parse_fixedlink(struct phylink *pl, 514 struct fwnode_handle *fwnode) 515 { 516 struct fwnode_handle *fixed_node; 517 const struct phy_setting *s; 518 struct gpio_desc *desc; 519 u32 speed; 520 int ret; 521 522 fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link"); 523 if (fixed_node) { 524 ret = fwnode_property_read_u32(fixed_node, "speed", &speed); 525 526 pl->link_config.speed = speed; 527 pl->link_config.duplex = DUPLEX_HALF; 528 529 if (fwnode_property_read_bool(fixed_node, "full-duplex")) 530 pl->link_config.duplex = DUPLEX_FULL; 531 532 /* We treat the "pause" and "asym-pause" terminology as 533 * defining the link partner's ability. 534 */ 535 if (fwnode_property_read_bool(fixed_node, "pause")) 536 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 537 pl->link_config.lp_advertising); 538 if (fwnode_property_read_bool(fixed_node, "asym-pause")) 539 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 540 pl->link_config.lp_advertising); 541 542 if (ret == 0) { 543 desc = fwnode_gpiod_get_index(fixed_node, "link", 0, 544 GPIOD_IN, "?"); 545 546 if (!IS_ERR(desc)) 547 pl->link_gpio = desc; 548 else if (desc == ERR_PTR(-EPROBE_DEFER)) 549 ret = -EPROBE_DEFER; 550 } 551 fwnode_handle_put(fixed_node); 552 553 if (ret) 554 return ret; 555 } else { 556 u32 prop[5]; 557 558 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 559 NULL, 0); 560 if (ret != ARRAY_SIZE(prop)) { 561 phylink_err(pl, "broken fixed-link?\n"); 562 return -EINVAL; 563 } 564 565 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 566 prop, ARRAY_SIZE(prop)); 567 if (!ret) { 568 pl->link_config.duplex = prop[1] ? 569 DUPLEX_FULL : DUPLEX_HALF; 570 pl->link_config.speed = prop[2]; 571 if (prop[3]) 572 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 573 pl->link_config.lp_advertising); 574 if (prop[4]) 575 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 576 pl->link_config.lp_advertising); 577 } 578 } 579 580 if (pl->link_config.speed > SPEED_1000 && 581 pl->link_config.duplex != DUPLEX_FULL) 582 phylink_warn(pl, "fixed link specifies half duplex for %dMbps link?\n", 583 pl->link_config.speed); 584 585 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 586 linkmode_copy(pl->link_config.advertising, pl->supported); 587 phylink_validate(pl, pl->supported, &pl->link_config); 588 589 s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex, 590 pl->supported, true); 591 linkmode_zero(pl->supported); 592 phylink_set(pl->supported, MII); 593 phylink_set(pl->supported, Pause); 594 phylink_set(pl->supported, Asym_Pause); 595 phylink_set(pl->supported, Autoneg); 596 if (s) { 597 __set_bit(s->bit, pl->supported); 598 __set_bit(s->bit, pl->link_config.lp_advertising); 599 } else { 600 phylink_warn(pl, "fixed link %s duplex %dMbps not recognised\n", 601 pl->link_config.duplex == DUPLEX_FULL ? "full" : "half", 602 pl->link_config.speed); 603 } 604 605 linkmode_and(pl->link_config.advertising, pl->link_config.advertising, 606 pl->supported); 607 608 pl->link_config.link = 1; 609 pl->link_config.an_complete = 1; 610 611 return 0; 612 } 613 614 static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode) 615 { 616 struct fwnode_handle *dn; 617 const char *managed; 618 619 dn = fwnode_get_named_child_node(fwnode, "fixed-link"); 620 if (dn || fwnode_property_present(fwnode, "fixed-link")) 621 pl->cfg_link_an_mode = MLO_AN_FIXED; 622 fwnode_handle_put(dn); 623 624 if ((fwnode_property_read_string(fwnode, "managed", &managed) == 0 && 625 strcmp(managed, "in-band-status") == 0) || 626 pl->config->ovr_an_inband) { 627 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 628 phylink_err(pl, 629 "can't use both fixed-link and in-band-status\n"); 630 return -EINVAL; 631 } 632 633 linkmode_zero(pl->supported); 634 phylink_set(pl->supported, MII); 635 phylink_set(pl->supported, Autoneg); 636 phylink_set(pl->supported, Asym_Pause); 637 phylink_set(pl->supported, Pause); 638 pl->link_config.an_enabled = true; 639 pl->cfg_link_an_mode = MLO_AN_INBAND; 640 641 switch (pl->link_config.interface) { 642 case PHY_INTERFACE_MODE_SGMII: 643 case PHY_INTERFACE_MODE_QSGMII: 644 phylink_set(pl->supported, 10baseT_Half); 645 phylink_set(pl->supported, 10baseT_Full); 646 phylink_set(pl->supported, 100baseT_Half); 647 phylink_set(pl->supported, 100baseT_Full); 648 phylink_set(pl->supported, 1000baseT_Half); 649 phylink_set(pl->supported, 1000baseT_Full); 650 break; 651 652 case PHY_INTERFACE_MODE_1000BASEX: 653 phylink_set(pl->supported, 1000baseX_Full); 654 break; 655 656 case PHY_INTERFACE_MODE_2500BASEX: 657 phylink_set(pl->supported, 2500baseX_Full); 658 break; 659 660 case PHY_INTERFACE_MODE_5GBASER: 661 phylink_set(pl->supported, 5000baseT_Full); 662 break; 663 664 case PHY_INTERFACE_MODE_25GBASER: 665 phylink_set(pl->supported, 25000baseCR_Full); 666 phylink_set(pl->supported, 25000baseKR_Full); 667 phylink_set(pl->supported, 25000baseSR_Full); 668 fallthrough; 669 case PHY_INTERFACE_MODE_USXGMII: 670 case PHY_INTERFACE_MODE_10GKR: 671 case PHY_INTERFACE_MODE_10GBASER: 672 phylink_set(pl->supported, 10baseT_Half); 673 phylink_set(pl->supported, 10baseT_Full); 674 phylink_set(pl->supported, 100baseT_Half); 675 phylink_set(pl->supported, 100baseT_Full); 676 phylink_set(pl->supported, 1000baseT_Half); 677 phylink_set(pl->supported, 1000baseT_Full); 678 phylink_set(pl->supported, 1000baseX_Full); 679 phylink_set(pl->supported, 1000baseKX_Full); 680 phylink_set(pl->supported, 2500baseT_Full); 681 phylink_set(pl->supported, 2500baseX_Full); 682 phylink_set(pl->supported, 5000baseT_Full); 683 phylink_set(pl->supported, 10000baseT_Full); 684 phylink_set(pl->supported, 10000baseKR_Full); 685 phylink_set(pl->supported, 10000baseKX4_Full); 686 phylink_set(pl->supported, 10000baseCR_Full); 687 phylink_set(pl->supported, 10000baseSR_Full); 688 phylink_set(pl->supported, 10000baseLR_Full); 689 phylink_set(pl->supported, 10000baseLRM_Full); 690 phylink_set(pl->supported, 10000baseER_Full); 691 break; 692 693 case PHY_INTERFACE_MODE_XLGMII: 694 phylink_set(pl->supported, 25000baseCR_Full); 695 phylink_set(pl->supported, 25000baseKR_Full); 696 phylink_set(pl->supported, 25000baseSR_Full); 697 phylink_set(pl->supported, 40000baseKR4_Full); 698 phylink_set(pl->supported, 40000baseCR4_Full); 699 phylink_set(pl->supported, 40000baseSR4_Full); 700 phylink_set(pl->supported, 40000baseLR4_Full); 701 phylink_set(pl->supported, 50000baseCR2_Full); 702 phylink_set(pl->supported, 50000baseKR2_Full); 703 phylink_set(pl->supported, 50000baseSR2_Full); 704 phylink_set(pl->supported, 50000baseKR_Full); 705 phylink_set(pl->supported, 50000baseSR_Full); 706 phylink_set(pl->supported, 50000baseCR_Full); 707 phylink_set(pl->supported, 50000baseLR_ER_FR_Full); 708 phylink_set(pl->supported, 50000baseDR_Full); 709 phylink_set(pl->supported, 100000baseKR4_Full); 710 phylink_set(pl->supported, 100000baseSR4_Full); 711 phylink_set(pl->supported, 100000baseCR4_Full); 712 phylink_set(pl->supported, 100000baseLR4_ER4_Full); 713 phylink_set(pl->supported, 100000baseKR2_Full); 714 phylink_set(pl->supported, 100000baseSR2_Full); 715 phylink_set(pl->supported, 100000baseCR2_Full); 716 phylink_set(pl->supported, 100000baseLR2_ER2_FR2_Full); 717 phylink_set(pl->supported, 100000baseDR2_Full); 718 break; 719 720 default: 721 phylink_err(pl, 722 "incorrect link mode %s for in-band status\n", 723 phy_modes(pl->link_config.interface)); 724 return -EINVAL; 725 } 726 727 linkmode_copy(pl->link_config.advertising, pl->supported); 728 729 if (phylink_validate(pl, pl->supported, &pl->link_config)) { 730 phylink_err(pl, 731 "failed to validate link configuration for in-band status\n"); 732 return -EINVAL; 733 } 734 735 /* Check if MAC/PCS also supports Autoneg. */ 736 pl->link_config.an_enabled = phylink_test(pl->supported, Autoneg); 737 } 738 739 return 0; 740 } 741 742 static void phylink_apply_manual_flow(struct phylink *pl, 743 struct phylink_link_state *state) 744 { 745 /* If autoneg is disabled, pause AN is also disabled */ 746 if (!state->an_enabled) 747 state->pause &= ~MLO_PAUSE_AN; 748 749 /* Manual configuration of pause modes */ 750 if (!(pl->link_config.pause & MLO_PAUSE_AN)) 751 state->pause = pl->link_config.pause; 752 } 753 754 static void phylink_resolve_flow(struct phylink_link_state *state) 755 { 756 bool tx_pause, rx_pause; 757 758 state->pause = MLO_PAUSE_NONE; 759 if (state->duplex == DUPLEX_FULL) { 760 linkmode_resolve_pause(state->advertising, 761 state->lp_advertising, 762 &tx_pause, &rx_pause); 763 if (tx_pause) 764 state->pause |= MLO_PAUSE_TX; 765 if (rx_pause) 766 state->pause |= MLO_PAUSE_RX; 767 } 768 } 769 770 static void phylink_mac_config(struct phylink *pl, 771 const struct phylink_link_state *state) 772 { 773 phylink_dbg(pl, 774 "%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n", 775 __func__, phylink_an_mode_str(pl->cur_link_an_mode), 776 phy_modes(state->interface), 777 phy_speed_to_str(state->speed), 778 phy_duplex_to_str(state->duplex), 779 __ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising, 780 state->pause, state->link, state->an_enabled); 781 782 pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, state); 783 } 784 785 static void phylink_mac_pcs_an_restart(struct phylink *pl) 786 { 787 if (pl->link_config.an_enabled && 788 phy_interface_mode_is_8023z(pl->link_config.interface) && 789 phylink_autoneg_inband(pl->cur_link_an_mode)) { 790 if (pl->pcs_ops) 791 pl->pcs_ops->pcs_an_restart(pl->pcs); 792 else if (pl->config->legacy_pre_march2020) 793 pl->mac_ops->mac_an_restart(pl->config); 794 } 795 } 796 797 static void phylink_major_config(struct phylink *pl, bool restart, 798 const struct phylink_link_state *state) 799 { 800 struct phylink_pcs *pcs = NULL; 801 int err; 802 803 phylink_dbg(pl, "major config %s\n", phy_modes(state->interface)); 804 805 if (pl->mac_ops->mac_select_pcs) { 806 pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface); 807 if (IS_ERR(pcs)) { 808 phylink_err(pl, 809 "mac_select_pcs unexpectedly failed: %pe\n", 810 pcs); 811 return; 812 } 813 } 814 815 if (pl->mac_ops->mac_prepare) { 816 err = pl->mac_ops->mac_prepare(pl->config, pl->cur_link_an_mode, 817 state->interface); 818 if (err < 0) { 819 phylink_err(pl, "mac_prepare failed: %pe\n", 820 ERR_PTR(err)); 821 return; 822 } 823 } 824 825 /* If we have a new PCS, switch to the new PCS after preparing the MAC 826 * for the change. 827 */ 828 if (pcs) 829 phylink_set_pcs(pl, pcs); 830 831 phylink_mac_config(pl, state); 832 833 if (pl->pcs_ops) { 834 err = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode, 835 state->interface, 836 state->advertising, 837 !!(pl->link_config.pause & 838 MLO_PAUSE_AN)); 839 if (err < 0) 840 phylink_err(pl, "pcs_config failed: %pe\n", 841 ERR_PTR(err)); 842 if (err > 0) 843 restart = true; 844 } 845 if (restart) 846 phylink_mac_pcs_an_restart(pl); 847 848 if (pl->mac_ops->mac_finish) { 849 err = pl->mac_ops->mac_finish(pl->config, pl->cur_link_an_mode, 850 state->interface); 851 if (err < 0) 852 phylink_err(pl, "mac_finish failed: %pe\n", 853 ERR_PTR(err)); 854 } 855 } 856 857 /* 858 * Reconfigure for a change of inband advertisement. 859 * If we have a separate PCS, we only need to call its pcs_config() method, 860 * and then restart AN if it indicates something changed. Otherwise, we do 861 * the full MAC reconfiguration. 862 */ 863 static int phylink_change_inband_advert(struct phylink *pl) 864 { 865 int ret; 866 867 if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) 868 return 0; 869 870 if (!pl->pcs_ops && pl->config->legacy_pre_march2020) { 871 /* Legacy method */ 872 phylink_mac_config(pl, &pl->link_config); 873 phylink_mac_pcs_an_restart(pl); 874 return 0; 875 } 876 877 phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__, 878 phylink_an_mode_str(pl->cur_link_an_mode), 879 phy_modes(pl->link_config.interface), 880 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->link_config.advertising, 881 pl->link_config.pause); 882 883 /* Modern PCS-based method; update the advert at the PCS, and 884 * restart negotiation if the pcs_config() helper indicates that 885 * the programmed advertisement has changed. 886 */ 887 ret = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode, 888 pl->link_config.interface, 889 pl->link_config.advertising, 890 !!(pl->link_config.pause & MLO_PAUSE_AN)); 891 if (ret < 0) 892 return ret; 893 894 if (ret > 0) 895 phylink_mac_pcs_an_restart(pl); 896 897 return 0; 898 } 899 900 static void phylink_mac_pcs_get_state(struct phylink *pl, 901 struct phylink_link_state *state) 902 { 903 linkmode_copy(state->advertising, pl->link_config.advertising); 904 linkmode_zero(state->lp_advertising); 905 state->interface = pl->link_config.interface; 906 state->an_enabled = pl->link_config.an_enabled; 907 if (state->an_enabled) { 908 state->speed = SPEED_UNKNOWN; 909 state->duplex = DUPLEX_UNKNOWN; 910 state->pause = MLO_PAUSE_NONE; 911 } else { 912 state->speed = pl->link_config.speed; 913 state->duplex = pl->link_config.duplex; 914 state->pause = pl->link_config.pause; 915 } 916 state->an_complete = 0; 917 state->link = 1; 918 919 if (pl->pcs_ops) 920 pl->pcs_ops->pcs_get_state(pl->pcs, state); 921 else if (pl->mac_ops->mac_pcs_get_state && 922 pl->config->legacy_pre_march2020) 923 pl->mac_ops->mac_pcs_get_state(pl->config, state); 924 else 925 state->link = 0; 926 } 927 928 /* The fixed state is... fixed except for the link state, 929 * which may be determined by a GPIO or a callback. 930 */ 931 static void phylink_get_fixed_state(struct phylink *pl, 932 struct phylink_link_state *state) 933 { 934 *state = pl->link_config; 935 if (pl->config->get_fixed_state) 936 pl->config->get_fixed_state(pl->config, state); 937 else if (pl->link_gpio) 938 state->link = !!gpiod_get_value_cansleep(pl->link_gpio); 939 940 phylink_resolve_flow(state); 941 } 942 943 static void phylink_mac_initial_config(struct phylink *pl, bool force_restart) 944 { 945 struct phylink_link_state link_state; 946 947 switch (pl->cur_link_an_mode) { 948 case MLO_AN_PHY: 949 link_state = pl->phy_state; 950 break; 951 952 case MLO_AN_FIXED: 953 phylink_get_fixed_state(pl, &link_state); 954 break; 955 956 case MLO_AN_INBAND: 957 link_state = pl->link_config; 958 if (link_state.interface == PHY_INTERFACE_MODE_SGMII) 959 link_state.pause = MLO_PAUSE_NONE; 960 break; 961 962 default: /* can't happen */ 963 return; 964 } 965 966 link_state.link = false; 967 968 phylink_apply_manual_flow(pl, &link_state); 969 phylink_major_config(pl, force_restart, &link_state); 970 } 971 972 static const char *phylink_pause_to_str(int pause) 973 { 974 switch (pause & MLO_PAUSE_TXRX_MASK) { 975 case MLO_PAUSE_TX | MLO_PAUSE_RX: 976 return "rx/tx"; 977 case MLO_PAUSE_TX: 978 return "tx"; 979 case MLO_PAUSE_RX: 980 return "rx"; 981 default: 982 return "off"; 983 } 984 } 985 986 static void phylink_link_up(struct phylink *pl, 987 struct phylink_link_state link_state) 988 { 989 struct net_device *ndev = pl->netdev; 990 991 pl->cur_interface = link_state.interface; 992 993 if (pl->pcs_ops && pl->pcs_ops->pcs_link_up) 994 pl->pcs_ops->pcs_link_up(pl->pcs, pl->cur_link_an_mode, 995 pl->cur_interface, 996 link_state.speed, link_state.duplex); 997 998 pl->mac_ops->mac_link_up(pl->config, pl->phydev, 999 pl->cur_link_an_mode, pl->cur_interface, 1000 link_state.speed, link_state.duplex, 1001 !!(link_state.pause & MLO_PAUSE_TX), 1002 !!(link_state.pause & MLO_PAUSE_RX)); 1003 1004 if (ndev) 1005 netif_carrier_on(ndev); 1006 1007 phylink_info(pl, 1008 "Link is Up - %s/%s - flow control %s\n", 1009 phy_speed_to_str(link_state.speed), 1010 phy_duplex_to_str(link_state.duplex), 1011 phylink_pause_to_str(link_state.pause)); 1012 } 1013 1014 static void phylink_link_down(struct phylink *pl) 1015 { 1016 struct net_device *ndev = pl->netdev; 1017 1018 if (ndev) 1019 netif_carrier_off(ndev); 1020 pl->mac_ops->mac_link_down(pl->config, pl->cur_link_an_mode, 1021 pl->cur_interface); 1022 phylink_info(pl, "Link is Down\n"); 1023 } 1024 1025 static void phylink_resolve(struct work_struct *w) 1026 { 1027 struct phylink *pl = container_of(w, struct phylink, resolve); 1028 struct phylink_link_state link_state; 1029 struct net_device *ndev = pl->netdev; 1030 bool mac_config = false; 1031 bool retrigger = false; 1032 bool cur_link_state; 1033 1034 mutex_lock(&pl->state_mutex); 1035 if (pl->netdev) 1036 cur_link_state = netif_carrier_ok(ndev); 1037 else 1038 cur_link_state = pl->old_link_state; 1039 1040 if (pl->phylink_disable_state) { 1041 pl->mac_link_dropped = false; 1042 link_state.link = false; 1043 } else if (pl->mac_link_dropped) { 1044 link_state.link = false; 1045 retrigger = true; 1046 } else { 1047 switch (pl->cur_link_an_mode) { 1048 case MLO_AN_PHY: 1049 link_state = pl->phy_state; 1050 phylink_apply_manual_flow(pl, &link_state); 1051 mac_config = link_state.link; 1052 break; 1053 1054 case MLO_AN_FIXED: 1055 phylink_get_fixed_state(pl, &link_state); 1056 mac_config = link_state.link; 1057 break; 1058 1059 case MLO_AN_INBAND: 1060 phylink_mac_pcs_get_state(pl, &link_state); 1061 1062 /* The PCS may have a latching link-fail indicator. 1063 * If the link was up, bring the link down and 1064 * re-trigger the resolve. Otherwise, re-read the 1065 * PCS state to get the current status of the link. 1066 */ 1067 if (!link_state.link) { 1068 if (cur_link_state) 1069 retrigger = true; 1070 else 1071 phylink_mac_pcs_get_state(pl, 1072 &link_state); 1073 } 1074 1075 /* If we have a phy, the "up" state is the union of 1076 * both the PHY and the MAC 1077 */ 1078 if (pl->phydev) 1079 link_state.link &= pl->phy_state.link; 1080 1081 /* Only update if the PHY link is up */ 1082 if (pl->phydev && pl->phy_state.link) { 1083 /* If the interface has changed, force a 1084 * link down event if the link isn't already 1085 * down, and re-resolve. 1086 */ 1087 if (link_state.interface != 1088 pl->phy_state.interface) { 1089 retrigger = true; 1090 link_state.link = false; 1091 } 1092 link_state.interface = pl->phy_state.interface; 1093 1094 /* If we have a PHY, we need to update with 1095 * the PHY flow control bits. 1096 */ 1097 link_state.pause = pl->phy_state.pause; 1098 mac_config = true; 1099 } 1100 phylink_apply_manual_flow(pl, &link_state); 1101 break; 1102 } 1103 } 1104 1105 if (mac_config) { 1106 if (link_state.interface != pl->link_config.interface) { 1107 /* The interface has changed, force the link down and 1108 * then reconfigure. 1109 */ 1110 if (cur_link_state) { 1111 phylink_link_down(pl); 1112 cur_link_state = false; 1113 } 1114 phylink_major_config(pl, false, &link_state); 1115 pl->link_config.interface = link_state.interface; 1116 } else if (!pl->pcs_ops && pl->config->legacy_pre_march2020) { 1117 /* The interface remains unchanged, only the speed, 1118 * duplex or pause settings have changed. Call the 1119 * old mac_config() method to configure the MAC/PCS 1120 * only if we do not have a legacy MAC driver. 1121 */ 1122 phylink_mac_config(pl, &link_state); 1123 } 1124 } 1125 1126 if (link_state.link != cur_link_state) { 1127 pl->old_link_state = link_state.link; 1128 if (!link_state.link) 1129 phylink_link_down(pl); 1130 else 1131 phylink_link_up(pl, link_state); 1132 } 1133 if (!link_state.link && retrigger) { 1134 pl->mac_link_dropped = false; 1135 queue_work(system_power_efficient_wq, &pl->resolve); 1136 } 1137 mutex_unlock(&pl->state_mutex); 1138 } 1139 1140 static void phylink_run_resolve(struct phylink *pl) 1141 { 1142 if (!pl->phylink_disable_state) 1143 queue_work(system_power_efficient_wq, &pl->resolve); 1144 } 1145 1146 static void phylink_run_resolve_and_disable(struct phylink *pl, int bit) 1147 { 1148 unsigned long state = pl->phylink_disable_state; 1149 1150 set_bit(bit, &pl->phylink_disable_state); 1151 if (state == 0) { 1152 queue_work(system_power_efficient_wq, &pl->resolve); 1153 flush_work(&pl->resolve); 1154 } 1155 } 1156 1157 static void phylink_enable_and_run_resolve(struct phylink *pl, int bit) 1158 { 1159 clear_bit(bit, &pl->phylink_disable_state); 1160 phylink_run_resolve(pl); 1161 } 1162 1163 static void phylink_fixed_poll(struct timer_list *t) 1164 { 1165 struct phylink *pl = container_of(t, struct phylink, link_poll); 1166 1167 mod_timer(t, jiffies + HZ); 1168 1169 phylink_run_resolve(pl); 1170 } 1171 1172 static const struct sfp_upstream_ops sfp_phylink_ops; 1173 1174 static int phylink_register_sfp(struct phylink *pl, 1175 struct fwnode_handle *fwnode) 1176 { 1177 struct sfp_bus *bus; 1178 int ret; 1179 1180 if (!fwnode) 1181 return 0; 1182 1183 bus = sfp_bus_find_fwnode(fwnode); 1184 if (IS_ERR(bus)) { 1185 ret = PTR_ERR(bus); 1186 phylink_err(pl, "unable to attach SFP bus: %d\n", ret); 1187 return ret; 1188 } 1189 1190 pl->sfp_bus = bus; 1191 1192 ret = sfp_bus_add_upstream(bus, pl, &sfp_phylink_ops); 1193 sfp_bus_put(bus); 1194 1195 return ret; 1196 } 1197 1198 /** 1199 * phylink_create() - create a phylink instance 1200 * @config: a pointer to the target &struct phylink_config 1201 * @fwnode: a pointer to a &struct fwnode_handle describing the network 1202 * interface 1203 * @iface: the desired link mode defined by &typedef phy_interface_t 1204 * @mac_ops: a pointer to a &struct phylink_mac_ops for the MAC. 1205 * 1206 * Create a new phylink instance, and parse the link parameters found in @np. 1207 * This will parse in-band modes, fixed-link or SFP configuration. 1208 * 1209 * Note: the rtnl lock must not be held when calling this function. 1210 * 1211 * Returns a pointer to a &struct phylink, or an error-pointer value. Users 1212 * must use IS_ERR() to check for errors from this function. 1213 */ 1214 struct phylink *phylink_create(struct phylink_config *config, 1215 struct fwnode_handle *fwnode, 1216 phy_interface_t iface, 1217 const struct phylink_mac_ops *mac_ops) 1218 { 1219 struct phylink *pl; 1220 int ret; 1221 1222 /* Validate the supplied configuration */ 1223 if (mac_ops->mac_select_pcs && 1224 phy_interface_empty(config->supported_interfaces)) { 1225 dev_err(config->dev, 1226 "phylink: error: empty supported_interfaces but mac_select_pcs() method present\n"); 1227 return ERR_PTR(-EINVAL); 1228 } 1229 1230 pl = kzalloc(sizeof(*pl), GFP_KERNEL); 1231 if (!pl) 1232 return ERR_PTR(-ENOMEM); 1233 1234 mutex_init(&pl->state_mutex); 1235 INIT_WORK(&pl->resolve, phylink_resolve); 1236 1237 pl->config = config; 1238 if (config->type == PHYLINK_NETDEV) { 1239 pl->netdev = to_net_dev(config->dev); 1240 } else if (config->type == PHYLINK_DEV) { 1241 pl->dev = config->dev; 1242 } else { 1243 kfree(pl); 1244 return ERR_PTR(-EINVAL); 1245 } 1246 1247 pl->phy_state.interface = iface; 1248 pl->link_interface = iface; 1249 if (iface == PHY_INTERFACE_MODE_MOCA) 1250 pl->link_port = PORT_BNC; 1251 else 1252 pl->link_port = PORT_MII; 1253 pl->link_config.interface = iface; 1254 pl->link_config.pause = MLO_PAUSE_AN; 1255 pl->link_config.speed = SPEED_UNKNOWN; 1256 pl->link_config.duplex = DUPLEX_UNKNOWN; 1257 pl->link_config.an_enabled = true; 1258 pl->mac_ops = mac_ops; 1259 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 1260 timer_setup(&pl->link_poll, phylink_fixed_poll, 0); 1261 1262 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 1263 linkmode_copy(pl->link_config.advertising, pl->supported); 1264 phylink_validate(pl, pl->supported, &pl->link_config); 1265 1266 ret = phylink_parse_mode(pl, fwnode); 1267 if (ret < 0) { 1268 kfree(pl); 1269 return ERR_PTR(ret); 1270 } 1271 1272 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 1273 ret = phylink_parse_fixedlink(pl, fwnode); 1274 if (ret < 0) { 1275 kfree(pl); 1276 return ERR_PTR(ret); 1277 } 1278 } 1279 1280 pl->cur_link_an_mode = pl->cfg_link_an_mode; 1281 1282 ret = phylink_register_sfp(pl, fwnode); 1283 if (ret < 0) { 1284 kfree(pl); 1285 return ERR_PTR(ret); 1286 } 1287 1288 return pl; 1289 } 1290 EXPORT_SYMBOL_GPL(phylink_create); 1291 1292 /** 1293 * phylink_set_pcs() - set the current PCS for phylink to use 1294 * @pl: a pointer to a &struct phylink returned from phylink_create() 1295 * @pcs: a pointer to the &struct phylink_pcs 1296 * 1297 * Bind the MAC PCS to phylink. This may be called after phylink_create(). 1298 * If it is desired to dynamically change the PCS, then the preferred method 1299 * is to use mac_select_pcs(), but it may also be called in mac_prepare() 1300 * or mac_config(). 1301 * 1302 * Please note that there are behavioural changes with the mac_config() 1303 * callback if a PCS is present (denoting a newer setup) so removing a PCS 1304 * is not supported, and if a PCS is going to be used, it must be registered 1305 * by calling phylink_set_pcs() at the latest in the first mac_config() call. 1306 */ 1307 void phylink_set_pcs(struct phylink *pl, struct phylink_pcs *pcs) 1308 { 1309 pl->pcs = pcs; 1310 pl->pcs_ops = pcs->ops; 1311 1312 if (!pl->phylink_disable_state && 1313 pl->cfg_link_an_mode == MLO_AN_INBAND) { 1314 if (pl->config->pcs_poll || pcs->poll) 1315 mod_timer(&pl->link_poll, jiffies + HZ); 1316 else 1317 del_timer(&pl->link_poll); 1318 } 1319 } 1320 EXPORT_SYMBOL_GPL(phylink_set_pcs); 1321 1322 /** 1323 * phylink_destroy() - cleanup and destroy the phylink instance 1324 * @pl: a pointer to a &struct phylink returned from phylink_create() 1325 * 1326 * Destroy a phylink instance. Any PHY that has been attached must have been 1327 * cleaned up via phylink_disconnect_phy() prior to calling this function. 1328 * 1329 * Note: the rtnl lock must not be held when calling this function. 1330 */ 1331 void phylink_destroy(struct phylink *pl) 1332 { 1333 sfp_bus_del_upstream(pl->sfp_bus); 1334 if (pl->link_gpio) 1335 gpiod_put(pl->link_gpio); 1336 1337 cancel_work_sync(&pl->resolve); 1338 kfree(pl); 1339 } 1340 EXPORT_SYMBOL_GPL(phylink_destroy); 1341 1342 static void phylink_phy_change(struct phy_device *phydev, bool up) 1343 { 1344 struct phylink *pl = phydev->phylink; 1345 bool tx_pause, rx_pause; 1346 1347 phy_get_pause(phydev, &tx_pause, &rx_pause); 1348 1349 mutex_lock(&pl->state_mutex); 1350 pl->phy_state.speed = phydev->speed; 1351 pl->phy_state.duplex = phydev->duplex; 1352 pl->phy_state.pause = MLO_PAUSE_NONE; 1353 if (tx_pause) 1354 pl->phy_state.pause |= MLO_PAUSE_TX; 1355 if (rx_pause) 1356 pl->phy_state.pause |= MLO_PAUSE_RX; 1357 pl->phy_state.interface = phydev->interface; 1358 pl->phy_state.link = up; 1359 mutex_unlock(&pl->state_mutex); 1360 1361 phylink_run_resolve(pl); 1362 1363 phylink_dbg(pl, "phy link %s %s/%s/%s/%s\n", up ? "up" : "down", 1364 phy_modes(phydev->interface), 1365 phy_speed_to_str(phydev->speed), 1366 phy_duplex_to_str(phydev->duplex), 1367 phylink_pause_to_str(pl->phy_state.pause)); 1368 } 1369 1370 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy, 1371 phy_interface_t interface) 1372 { 1373 struct phylink_link_state config; 1374 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 1375 char *irq_str; 1376 int ret; 1377 1378 /* 1379 * This is the new way of dealing with flow control for PHYs, 1380 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 1381 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 1382 * using our validate call to the MAC, we rely upon the MAC 1383 * clearing the bits from both supported and advertising fields. 1384 */ 1385 phy_support_asym_pause(phy); 1386 1387 memset(&config, 0, sizeof(config)); 1388 linkmode_copy(supported, phy->supported); 1389 linkmode_copy(config.advertising, phy->advertising); 1390 1391 /* Clause 45 PHYs switch their Serdes lane between several different 1392 * modes, normally 10GBASE-R, SGMII. Some use 2500BASE-X for 2.5G 1393 * speeds. We really need to know which interface modes the PHY and 1394 * MAC supports to properly work out which linkmodes can be supported. 1395 */ 1396 if (phy->is_c45 && 1397 interface != PHY_INTERFACE_MODE_RXAUI && 1398 interface != PHY_INTERFACE_MODE_XAUI && 1399 interface != PHY_INTERFACE_MODE_USXGMII) 1400 config.interface = PHY_INTERFACE_MODE_NA; 1401 else 1402 config.interface = interface; 1403 1404 ret = phylink_validate(pl, supported, &config); 1405 if (ret) { 1406 phylink_warn(pl, "validation of %s with support %*pb and advertisement %*pb failed: %d\n", 1407 phy_modes(config.interface), 1408 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->supported, 1409 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising, 1410 ret); 1411 return ret; 1412 } 1413 1414 phy->phylink = pl; 1415 phy->phy_link_change = phylink_phy_change; 1416 1417 irq_str = phy_attached_info_irq(phy); 1418 phylink_info(pl, 1419 "PHY [%s] driver [%s] (irq=%s)\n", 1420 dev_name(&phy->mdio.dev), phy->drv->name, irq_str); 1421 kfree(irq_str); 1422 1423 mutex_lock(&phy->lock); 1424 mutex_lock(&pl->state_mutex); 1425 pl->phydev = phy; 1426 pl->phy_state.interface = interface; 1427 pl->phy_state.pause = MLO_PAUSE_NONE; 1428 pl->phy_state.speed = SPEED_UNKNOWN; 1429 pl->phy_state.duplex = DUPLEX_UNKNOWN; 1430 linkmode_copy(pl->supported, supported); 1431 linkmode_copy(pl->link_config.advertising, config.advertising); 1432 1433 /* Restrict the phy advertisement according to the MAC support. */ 1434 linkmode_copy(phy->advertising, config.advertising); 1435 mutex_unlock(&pl->state_mutex); 1436 mutex_unlock(&phy->lock); 1437 1438 phylink_dbg(pl, 1439 "phy: %s setting supported %*pb advertising %*pb\n", 1440 phy_modes(interface), 1441 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported, 1442 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising); 1443 1444 if (phy_interrupt_is_valid(phy)) 1445 phy_request_interrupt(phy); 1446 1447 return 0; 1448 } 1449 1450 static int phylink_attach_phy(struct phylink *pl, struct phy_device *phy, 1451 phy_interface_t interface) 1452 { 1453 if (WARN_ON(pl->cfg_link_an_mode == MLO_AN_FIXED || 1454 (pl->cfg_link_an_mode == MLO_AN_INBAND && 1455 phy_interface_mode_is_8023z(interface)))) 1456 return -EINVAL; 1457 1458 if (pl->phydev) 1459 return -EBUSY; 1460 1461 return phy_attach_direct(pl->netdev, phy, 0, interface); 1462 } 1463 1464 /** 1465 * phylink_connect_phy() - connect a PHY to the phylink instance 1466 * @pl: a pointer to a &struct phylink returned from phylink_create() 1467 * @phy: a pointer to a &struct phy_device. 1468 * 1469 * Connect @phy to the phylink instance specified by @pl by calling 1470 * phy_attach_direct(). Configure the @phy according to the MAC driver's 1471 * capabilities, start the PHYLIB state machine and enable any interrupts 1472 * that the PHY supports. 1473 * 1474 * This updates the phylink's ethtool supported and advertising link mode 1475 * masks. 1476 * 1477 * Returns 0 on success or a negative errno. 1478 */ 1479 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy) 1480 { 1481 int ret; 1482 1483 /* Use PHY device/driver interface */ 1484 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 1485 pl->link_interface = phy->interface; 1486 pl->link_config.interface = pl->link_interface; 1487 } 1488 1489 ret = phylink_attach_phy(pl, phy, pl->link_interface); 1490 if (ret < 0) 1491 return ret; 1492 1493 ret = phylink_bringup_phy(pl, phy, pl->link_config.interface); 1494 if (ret) 1495 phy_detach(phy); 1496 1497 return ret; 1498 } 1499 EXPORT_SYMBOL_GPL(phylink_connect_phy); 1500 1501 /** 1502 * phylink_of_phy_connect() - connect the PHY specified in the DT mode. 1503 * @pl: a pointer to a &struct phylink returned from phylink_create() 1504 * @dn: a pointer to a &struct device_node. 1505 * @flags: PHY-specific flags to communicate to the PHY device driver 1506 * 1507 * Connect the phy specified in the device node @dn to the phylink instance 1508 * specified by @pl. Actions specified in phylink_connect_phy() will be 1509 * performed. 1510 * 1511 * Returns 0 on success or a negative errno. 1512 */ 1513 int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn, 1514 u32 flags) 1515 { 1516 return phylink_fwnode_phy_connect(pl, of_fwnode_handle(dn), flags); 1517 } 1518 EXPORT_SYMBOL_GPL(phylink_of_phy_connect); 1519 1520 /** 1521 * phylink_fwnode_phy_connect() - connect the PHY specified in the fwnode. 1522 * @pl: a pointer to a &struct phylink returned from phylink_create() 1523 * @fwnode: a pointer to a &struct fwnode_handle. 1524 * @flags: PHY-specific flags to communicate to the PHY device driver 1525 * 1526 * Connect the phy specified @fwnode to the phylink instance specified 1527 * by @pl. 1528 * 1529 * Returns 0 on success or a negative errno. 1530 */ 1531 int phylink_fwnode_phy_connect(struct phylink *pl, 1532 struct fwnode_handle *fwnode, 1533 u32 flags) 1534 { 1535 struct fwnode_handle *phy_fwnode; 1536 struct phy_device *phy_dev; 1537 int ret; 1538 1539 /* Fixed links and 802.3z are handled without needing a PHY */ 1540 if (pl->cfg_link_an_mode == MLO_AN_FIXED || 1541 (pl->cfg_link_an_mode == MLO_AN_INBAND && 1542 phy_interface_mode_is_8023z(pl->link_interface))) 1543 return 0; 1544 1545 phy_fwnode = fwnode_get_phy_node(fwnode); 1546 if (IS_ERR(phy_fwnode)) { 1547 if (pl->cfg_link_an_mode == MLO_AN_PHY) 1548 return -ENODEV; 1549 return 0; 1550 } 1551 1552 phy_dev = fwnode_phy_find_device(phy_fwnode); 1553 /* We're done with the phy_node handle */ 1554 fwnode_handle_put(phy_fwnode); 1555 if (!phy_dev) 1556 return -ENODEV; 1557 1558 /* Use PHY device/driver interface */ 1559 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 1560 pl->link_interface = phy_dev->interface; 1561 pl->link_config.interface = pl->link_interface; 1562 } 1563 1564 ret = phy_attach_direct(pl->netdev, phy_dev, flags, 1565 pl->link_interface); 1566 if (ret) { 1567 phy_device_free(phy_dev); 1568 return ret; 1569 } 1570 1571 ret = phylink_bringup_phy(pl, phy_dev, pl->link_config.interface); 1572 if (ret) 1573 phy_detach(phy_dev); 1574 1575 return ret; 1576 } 1577 EXPORT_SYMBOL_GPL(phylink_fwnode_phy_connect); 1578 1579 /** 1580 * phylink_disconnect_phy() - disconnect any PHY attached to the phylink 1581 * instance. 1582 * @pl: a pointer to a &struct phylink returned from phylink_create() 1583 * 1584 * Disconnect any current PHY from the phylink instance described by @pl. 1585 */ 1586 void phylink_disconnect_phy(struct phylink *pl) 1587 { 1588 struct phy_device *phy; 1589 1590 ASSERT_RTNL(); 1591 1592 phy = pl->phydev; 1593 if (phy) { 1594 mutex_lock(&phy->lock); 1595 mutex_lock(&pl->state_mutex); 1596 pl->phydev = NULL; 1597 mutex_unlock(&pl->state_mutex); 1598 mutex_unlock(&phy->lock); 1599 flush_work(&pl->resolve); 1600 1601 phy_disconnect(phy); 1602 } 1603 } 1604 EXPORT_SYMBOL_GPL(phylink_disconnect_phy); 1605 1606 /** 1607 * phylink_mac_change() - notify phylink of a change in MAC state 1608 * @pl: a pointer to a &struct phylink returned from phylink_create() 1609 * @up: indicates whether the link is currently up. 1610 * 1611 * The MAC driver should call this driver when the state of its link 1612 * changes (eg, link failure, new negotiation results, etc.) 1613 */ 1614 void phylink_mac_change(struct phylink *pl, bool up) 1615 { 1616 if (!up) 1617 pl->mac_link_dropped = true; 1618 phylink_run_resolve(pl); 1619 phylink_dbg(pl, "mac link %s\n", up ? "up" : "down"); 1620 } 1621 EXPORT_SYMBOL_GPL(phylink_mac_change); 1622 1623 static irqreturn_t phylink_link_handler(int irq, void *data) 1624 { 1625 struct phylink *pl = data; 1626 1627 phylink_run_resolve(pl); 1628 1629 return IRQ_HANDLED; 1630 } 1631 1632 /** 1633 * phylink_start() - start a phylink instance 1634 * @pl: a pointer to a &struct phylink returned from phylink_create() 1635 * 1636 * Start the phylink instance specified by @pl, configuring the MAC for the 1637 * desired link mode(s) and negotiation style. This should be called from the 1638 * network device driver's &struct net_device_ops ndo_open() method. 1639 */ 1640 void phylink_start(struct phylink *pl) 1641 { 1642 bool poll = false; 1643 1644 ASSERT_RTNL(); 1645 1646 phylink_info(pl, "configuring for %s/%s link mode\n", 1647 phylink_an_mode_str(pl->cur_link_an_mode), 1648 phy_modes(pl->link_config.interface)); 1649 1650 /* Always set the carrier off */ 1651 if (pl->netdev) 1652 netif_carrier_off(pl->netdev); 1653 1654 /* Apply the link configuration to the MAC when starting. This allows 1655 * a fixed-link to start with the correct parameters, and also 1656 * ensures that we set the appropriate advertisement for Serdes links. 1657 * 1658 * Restart autonegotiation if using 802.3z to ensure that the link 1659 * parameters are properly negotiated. This is necessary for DSA 1660 * switches using 802.3z negotiation to ensure they see our modes. 1661 */ 1662 phylink_mac_initial_config(pl, true); 1663 1664 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_STOPPED); 1665 1666 if (pl->cfg_link_an_mode == MLO_AN_FIXED && pl->link_gpio) { 1667 int irq = gpiod_to_irq(pl->link_gpio); 1668 1669 if (irq > 0) { 1670 if (!request_irq(irq, phylink_link_handler, 1671 IRQF_TRIGGER_RISING | 1672 IRQF_TRIGGER_FALLING, 1673 "netdev link", pl)) 1674 pl->link_irq = irq; 1675 else 1676 irq = 0; 1677 } 1678 if (irq <= 0) 1679 poll = true; 1680 } 1681 1682 switch (pl->cfg_link_an_mode) { 1683 case MLO_AN_FIXED: 1684 poll |= pl->config->poll_fixed_state; 1685 break; 1686 case MLO_AN_INBAND: 1687 poll |= pl->config->pcs_poll; 1688 if (pl->pcs) 1689 poll |= pl->pcs->poll; 1690 break; 1691 } 1692 if (poll) 1693 mod_timer(&pl->link_poll, jiffies + HZ); 1694 if (pl->phydev) 1695 phy_start(pl->phydev); 1696 if (pl->sfp_bus) 1697 sfp_upstream_start(pl->sfp_bus); 1698 } 1699 EXPORT_SYMBOL_GPL(phylink_start); 1700 1701 /** 1702 * phylink_stop() - stop a phylink instance 1703 * @pl: a pointer to a &struct phylink returned from phylink_create() 1704 * 1705 * Stop the phylink instance specified by @pl. This should be called from the 1706 * network device driver's &struct net_device_ops ndo_stop() method. The 1707 * network device's carrier state should not be changed prior to calling this 1708 * function. 1709 * 1710 * This will synchronously bring down the link if the link is not already 1711 * down (in other words, it will trigger a mac_link_down() method call.) 1712 */ 1713 void phylink_stop(struct phylink *pl) 1714 { 1715 ASSERT_RTNL(); 1716 1717 if (pl->sfp_bus) 1718 sfp_upstream_stop(pl->sfp_bus); 1719 if (pl->phydev) 1720 phy_stop(pl->phydev); 1721 del_timer_sync(&pl->link_poll); 1722 if (pl->link_irq) { 1723 free_irq(pl->link_irq, pl); 1724 pl->link_irq = 0; 1725 } 1726 1727 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED); 1728 } 1729 EXPORT_SYMBOL_GPL(phylink_stop); 1730 1731 /** 1732 * phylink_suspend() - handle a network device suspend event 1733 * @pl: a pointer to a &struct phylink returned from phylink_create() 1734 * @mac_wol: true if the MAC needs to receive packets for Wake-on-Lan 1735 * 1736 * Handle a network device suspend event. There are several cases: 1737 * 1738 * - If Wake-on-Lan is not active, we can bring down the link between 1739 * the MAC and PHY by calling phylink_stop(). 1740 * - If Wake-on-Lan is active, and being handled only by the PHY, we 1741 * can also bring down the link between the MAC and PHY. 1742 * - If Wake-on-Lan is active, but being handled by the MAC, the MAC 1743 * still needs to receive packets, so we can not bring the link down. 1744 */ 1745 void phylink_suspend(struct phylink *pl, bool mac_wol) 1746 { 1747 ASSERT_RTNL(); 1748 1749 if (mac_wol && (!pl->netdev || pl->netdev->wol_enabled)) { 1750 /* Wake-on-Lan enabled, MAC handling */ 1751 mutex_lock(&pl->state_mutex); 1752 1753 /* Stop the resolver bringing the link up */ 1754 __set_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state); 1755 1756 /* Disable the carrier, to prevent transmit timeouts, 1757 * but one would hope all packets have been sent. This 1758 * also means phylink_resolve() will do nothing. 1759 */ 1760 if (pl->netdev) 1761 netif_carrier_off(pl->netdev); 1762 else 1763 pl->old_link_state = false; 1764 1765 /* We do not call mac_link_down() here as we want the 1766 * link to remain up to receive the WoL packets. 1767 */ 1768 mutex_unlock(&pl->state_mutex); 1769 } else { 1770 phylink_stop(pl); 1771 } 1772 } 1773 EXPORT_SYMBOL_GPL(phylink_suspend); 1774 1775 /** 1776 * phylink_resume() - handle a network device resume event 1777 * @pl: a pointer to a &struct phylink returned from phylink_create() 1778 * 1779 * Undo the effects of phylink_suspend(), returning the link to an 1780 * operational state. 1781 */ 1782 void phylink_resume(struct phylink *pl) 1783 { 1784 ASSERT_RTNL(); 1785 1786 if (test_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state)) { 1787 /* Wake-on-Lan enabled, MAC handling */ 1788 1789 /* Call mac_link_down() so we keep the overall state balanced. 1790 * Do this under the state_mutex lock for consistency. This 1791 * will cause a "Link Down" message to be printed during 1792 * resume, which is harmless - the true link state will be 1793 * printed when we run a resolve. 1794 */ 1795 mutex_lock(&pl->state_mutex); 1796 phylink_link_down(pl); 1797 mutex_unlock(&pl->state_mutex); 1798 1799 /* Re-apply the link parameters so that all the settings get 1800 * restored to the MAC. 1801 */ 1802 phylink_mac_initial_config(pl, true); 1803 1804 /* Re-enable and re-resolve the link parameters */ 1805 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_MAC_WOL); 1806 } else { 1807 phylink_start(pl); 1808 } 1809 } 1810 EXPORT_SYMBOL_GPL(phylink_resume); 1811 1812 /** 1813 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY 1814 * @pl: a pointer to a &struct phylink returned from phylink_create() 1815 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters 1816 * 1817 * Read the wake on lan parameters from the PHY attached to the phylink 1818 * instance specified by @pl. If no PHY is currently attached, report no 1819 * support for wake on lan. 1820 */ 1821 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 1822 { 1823 ASSERT_RTNL(); 1824 1825 wol->supported = 0; 1826 wol->wolopts = 0; 1827 1828 if (pl->phydev) 1829 phy_ethtool_get_wol(pl->phydev, wol); 1830 } 1831 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol); 1832 1833 /** 1834 * phylink_ethtool_set_wol() - set wake on lan parameters 1835 * @pl: a pointer to a &struct phylink returned from phylink_create() 1836 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters 1837 * 1838 * Set the wake on lan parameters for the PHY attached to the phylink 1839 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP 1840 * error. 1841 * 1842 * Returns zero on success or negative errno code. 1843 */ 1844 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 1845 { 1846 int ret = -EOPNOTSUPP; 1847 1848 ASSERT_RTNL(); 1849 1850 if (pl->phydev) 1851 ret = phy_ethtool_set_wol(pl->phydev, wol); 1852 1853 return ret; 1854 } 1855 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol); 1856 1857 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b) 1858 { 1859 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask); 1860 1861 linkmode_zero(mask); 1862 phylink_set_port_modes(mask); 1863 1864 linkmode_and(dst, dst, mask); 1865 linkmode_or(dst, dst, b); 1866 } 1867 1868 static void phylink_get_ksettings(const struct phylink_link_state *state, 1869 struct ethtool_link_ksettings *kset) 1870 { 1871 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising); 1872 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising); 1873 kset->base.speed = state->speed; 1874 kset->base.duplex = state->duplex; 1875 kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE : 1876 AUTONEG_DISABLE; 1877 } 1878 1879 /** 1880 * phylink_ethtool_ksettings_get() - get the current link settings 1881 * @pl: a pointer to a &struct phylink returned from phylink_create() 1882 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings 1883 * 1884 * Read the current link settings for the phylink instance specified by @pl. 1885 * This will be the link settings read from the MAC, PHY or fixed link 1886 * settings depending on the current negotiation mode. 1887 */ 1888 int phylink_ethtool_ksettings_get(struct phylink *pl, 1889 struct ethtool_link_ksettings *kset) 1890 { 1891 struct phylink_link_state link_state; 1892 1893 ASSERT_RTNL(); 1894 1895 if (pl->phydev) 1896 phy_ethtool_ksettings_get(pl->phydev, kset); 1897 else 1898 kset->base.port = pl->link_port; 1899 1900 linkmode_copy(kset->link_modes.supported, pl->supported); 1901 1902 switch (pl->cur_link_an_mode) { 1903 case MLO_AN_FIXED: 1904 /* We are using fixed settings. Report these as the 1905 * current link settings - and note that these also 1906 * represent the supported speeds/duplex/pause modes. 1907 */ 1908 phylink_get_fixed_state(pl, &link_state); 1909 phylink_get_ksettings(&link_state, kset); 1910 break; 1911 1912 case MLO_AN_INBAND: 1913 /* If there is a phy attached, then use the reported 1914 * settings from the phy with no modification. 1915 */ 1916 if (pl->phydev) 1917 break; 1918 1919 phylink_mac_pcs_get_state(pl, &link_state); 1920 1921 /* The MAC is reporting the link results from its own PCS 1922 * layer via in-band status. Report these as the current 1923 * link settings. 1924 */ 1925 phylink_get_ksettings(&link_state, kset); 1926 break; 1927 } 1928 1929 return 0; 1930 } 1931 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get); 1932 1933 /** 1934 * phylink_ethtool_ksettings_set() - set the link settings 1935 * @pl: a pointer to a &struct phylink returned from phylink_create() 1936 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes 1937 */ 1938 int phylink_ethtool_ksettings_set(struct phylink *pl, 1939 const struct ethtool_link_ksettings *kset) 1940 { 1941 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 1942 struct phylink_link_state config; 1943 const struct phy_setting *s; 1944 1945 ASSERT_RTNL(); 1946 1947 if (pl->phydev) { 1948 /* We can rely on phylib for this update; we also do not need 1949 * to update the pl->link_config settings: 1950 * - the configuration returned via ksettings_get() will come 1951 * from phylib whenever a PHY is present. 1952 * - link_config.interface will be updated by the PHY calling 1953 * back via phylink_phy_change() and a subsequent resolve. 1954 * - initial link configuration for PHY mode comes from the 1955 * last phy state updated via phylink_phy_change(). 1956 * - other configuration changes (e.g. pause modes) are 1957 * performed directly via phylib. 1958 * - if in in-band mode with a PHY, the link configuration 1959 * is passed on the link from the PHY, and all of 1960 * link_config.{speed,duplex,an_enabled,pause} are not used. 1961 * - the only possible use would be link_config.advertising 1962 * pause modes when in 1000base-X mode with a PHY, but in 1963 * the presence of a PHY, this should not be changed as that 1964 * should be determined from the media side advertisement. 1965 */ 1966 return phy_ethtool_ksettings_set(pl->phydev, kset); 1967 } 1968 1969 config = pl->link_config; 1970 1971 /* Mask out unsupported advertisements */ 1972 linkmode_and(config.advertising, kset->link_modes.advertising, 1973 pl->supported); 1974 1975 /* FIXME: should we reject autoneg if phy/mac does not support it? */ 1976 switch (kset->base.autoneg) { 1977 case AUTONEG_DISABLE: 1978 /* Autonegotiation disabled, select a suitable speed and 1979 * duplex. 1980 */ 1981 s = phy_lookup_setting(kset->base.speed, kset->base.duplex, 1982 pl->supported, false); 1983 if (!s) 1984 return -EINVAL; 1985 1986 /* If we have a fixed link, refuse to change link parameters. 1987 * If the link parameters match, accept them but do nothing. 1988 */ 1989 if (pl->cur_link_an_mode == MLO_AN_FIXED) { 1990 if (s->speed != pl->link_config.speed || 1991 s->duplex != pl->link_config.duplex) 1992 return -EINVAL; 1993 return 0; 1994 } 1995 1996 config.speed = s->speed; 1997 config.duplex = s->duplex; 1998 break; 1999 2000 case AUTONEG_ENABLE: 2001 /* If we have a fixed link, allow autonegotiation (since that 2002 * is our default case) but do not allow the advertisement to 2003 * be changed. If the advertisement matches, simply return. 2004 */ 2005 if (pl->cur_link_an_mode == MLO_AN_FIXED) { 2006 if (!linkmode_equal(config.advertising, 2007 pl->link_config.advertising)) 2008 return -EINVAL; 2009 return 0; 2010 } 2011 2012 config.speed = SPEED_UNKNOWN; 2013 config.duplex = DUPLEX_UNKNOWN; 2014 break; 2015 2016 default: 2017 return -EINVAL; 2018 } 2019 2020 /* We have ruled out the case with a PHY attached, and the 2021 * fixed-link cases. All that is left are in-band links. 2022 */ 2023 config.an_enabled = kset->base.autoneg == AUTONEG_ENABLE; 2024 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising, 2025 config.an_enabled); 2026 2027 /* If this link is with an SFP, ensure that changes to advertised modes 2028 * also cause the associated interface to be selected such that the 2029 * link can be configured correctly. 2030 */ 2031 if (pl->sfp_bus) { 2032 config.interface = sfp_select_interface(pl->sfp_bus, 2033 config.advertising); 2034 if (config.interface == PHY_INTERFACE_MODE_NA) { 2035 phylink_err(pl, 2036 "selection of interface failed, advertisement %*pb\n", 2037 __ETHTOOL_LINK_MODE_MASK_NBITS, 2038 config.advertising); 2039 return -EINVAL; 2040 } 2041 2042 /* Revalidate with the selected interface */ 2043 linkmode_copy(support, pl->supported); 2044 if (phylink_validate(pl, support, &config)) { 2045 phylink_err(pl, "validation of %s/%s with support %*pb failed\n", 2046 phylink_an_mode_str(pl->cur_link_an_mode), 2047 phy_modes(config.interface), 2048 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 2049 return -EINVAL; 2050 } 2051 } else { 2052 /* Validate without changing the current supported mask. */ 2053 linkmode_copy(support, pl->supported); 2054 if (phylink_validate(pl, support, &config)) 2055 return -EINVAL; 2056 } 2057 2058 /* If autonegotiation is enabled, we must have an advertisement */ 2059 if (config.an_enabled && phylink_is_empty_linkmode(config.advertising)) 2060 return -EINVAL; 2061 2062 mutex_lock(&pl->state_mutex); 2063 pl->link_config.speed = config.speed; 2064 pl->link_config.duplex = config.duplex; 2065 pl->link_config.an_enabled = config.an_enabled; 2066 2067 if (pl->link_config.interface != config.interface) { 2068 /* The interface changed, e.g. 1000base-X <-> 2500base-X */ 2069 /* We need to force the link down, then change the interface */ 2070 if (pl->old_link_state) { 2071 phylink_link_down(pl); 2072 pl->old_link_state = false; 2073 } 2074 if (!test_bit(PHYLINK_DISABLE_STOPPED, 2075 &pl->phylink_disable_state)) 2076 phylink_major_config(pl, false, &config); 2077 pl->link_config.interface = config.interface; 2078 linkmode_copy(pl->link_config.advertising, config.advertising); 2079 } else if (!linkmode_equal(pl->link_config.advertising, 2080 config.advertising)) { 2081 linkmode_copy(pl->link_config.advertising, config.advertising); 2082 phylink_change_inband_advert(pl); 2083 } 2084 mutex_unlock(&pl->state_mutex); 2085 2086 return 0; 2087 } 2088 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set); 2089 2090 /** 2091 * phylink_ethtool_nway_reset() - restart negotiation 2092 * @pl: a pointer to a &struct phylink returned from phylink_create() 2093 * 2094 * Restart negotiation for the phylink instance specified by @pl. This will 2095 * cause any attached phy to restart negotiation with the link partner, and 2096 * if the MAC is in a BaseX mode, the MAC will also be requested to restart 2097 * negotiation. 2098 * 2099 * Returns zero on success, or negative error code. 2100 */ 2101 int phylink_ethtool_nway_reset(struct phylink *pl) 2102 { 2103 int ret = 0; 2104 2105 ASSERT_RTNL(); 2106 2107 if (pl->phydev) 2108 ret = phy_restart_aneg(pl->phydev); 2109 phylink_mac_pcs_an_restart(pl); 2110 2111 return ret; 2112 } 2113 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset); 2114 2115 /** 2116 * phylink_ethtool_get_pauseparam() - get the current pause parameters 2117 * @pl: a pointer to a &struct phylink returned from phylink_create() 2118 * @pause: a pointer to a &struct ethtool_pauseparam 2119 */ 2120 void phylink_ethtool_get_pauseparam(struct phylink *pl, 2121 struct ethtool_pauseparam *pause) 2122 { 2123 ASSERT_RTNL(); 2124 2125 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN); 2126 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX); 2127 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX); 2128 } 2129 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam); 2130 2131 /** 2132 * phylink_ethtool_set_pauseparam() - set the current pause parameters 2133 * @pl: a pointer to a &struct phylink returned from phylink_create() 2134 * @pause: a pointer to a &struct ethtool_pauseparam 2135 */ 2136 int phylink_ethtool_set_pauseparam(struct phylink *pl, 2137 struct ethtool_pauseparam *pause) 2138 { 2139 struct phylink_link_state *config = &pl->link_config; 2140 bool manual_changed; 2141 int pause_state; 2142 2143 ASSERT_RTNL(); 2144 2145 if (pl->cur_link_an_mode == MLO_AN_FIXED) 2146 return -EOPNOTSUPP; 2147 2148 if (!phylink_test(pl->supported, Pause) && 2149 !phylink_test(pl->supported, Asym_Pause)) 2150 return -EOPNOTSUPP; 2151 2152 if (!phylink_test(pl->supported, Asym_Pause) && 2153 pause->rx_pause != pause->tx_pause) 2154 return -EINVAL; 2155 2156 pause_state = 0; 2157 if (pause->autoneg) 2158 pause_state |= MLO_PAUSE_AN; 2159 if (pause->rx_pause) 2160 pause_state |= MLO_PAUSE_RX; 2161 if (pause->tx_pause) 2162 pause_state |= MLO_PAUSE_TX; 2163 2164 mutex_lock(&pl->state_mutex); 2165 /* 2166 * See the comments for linkmode_set_pause(), wrt the deficiencies 2167 * with the current implementation. A solution to this issue would 2168 * be: 2169 * ethtool Local device 2170 * rx tx Pause AsymDir 2171 * 0 0 0 0 2172 * 1 0 1 1 2173 * 0 1 0 1 2174 * 1 1 1 1 2175 * and then use the ethtool rx/tx enablement status to mask the 2176 * rx/tx pause resolution. 2177 */ 2178 linkmode_set_pause(config->advertising, pause->tx_pause, 2179 pause->rx_pause); 2180 2181 manual_changed = (config->pause ^ pause_state) & MLO_PAUSE_AN || 2182 (!(pause_state & MLO_PAUSE_AN) && 2183 (config->pause ^ pause_state) & MLO_PAUSE_TXRX_MASK); 2184 2185 config->pause = pause_state; 2186 2187 /* Update our in-band advertisement, triggering a renegotiation if 2188 * the advertisement changed. 2189 */ 2190 if (!pl->phydev) 2191 phylink_change_inband_advert(pl); 2192 2193 mutex_unlock(&pl->state_mutex); 2194 2195 /* If we have a PHY, a change of the pause frame advertisement will 2196 * cause phylib to renegotiate (if AN is enabled) which will in turn 2197 * call our phylink_phy_change() and trigger a resolve. Note that 2198 * we can't hold our state mutex while calling phy_set_asym_pause(). 2199 */ 2200 if (pl->phydev) 2201 phy_set_asym_pause(pl->phydev, pause->rx_pause, 2202 pause->tx_pause); 2203 2204 /* If the manual pause settings changed, make sure we trigger a 2205 * resolve to update their state; we can not guarantee that the 2206 * link will cycle. 2207 */ 2208 if (manual_changed) { 2209 pl->mac_link_dropped = true; 2210 phylink_run_resolve(pl); 2211 } 2212 2213 return 0; 2214 } 2215 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam); 2216 2217 /** 2218 * phylink_get_eee_err() - read the energy efficient ethernet error 2219 * counter 2220 * @pl: a pointer to a &struct phylink returned from phylink_create(). 2221 * 2222 * Read the Energy Efficient Ethernet error counter from the PHY associated 2223 * with the phylink instance specified by @pl. 2224 * 2225 * Returns positive error counter value, or negative error code. 2226 */ 2227 int phylink_get_eee_err(struct phylink *pl) 2228 { 2229 int ret = 0; 2230 2231 ASSERT_RTNL(); 2232 2233 if (pl->phydev) 2234 ret = phy_get_eee_err(pl->phydev); 2235 2236 return ret; 2237 } 2238 EXPORT_SYMBOL_GPL(phylink_get_eee_err); 2239 2240 /** 2241 * phylink_init_eee() - init and check the EEE features 2242 * @pl: a pointer to a &struct phylink returned from phylink_create() 2243 * @clk_stop_enable: allow PHY to stop receive clock 2244 * 2245 * Must be called either with RTNL held or within mac_link_up() 2246 */ 2247 int phylink_init_eee(struct phylink *pl, bool clk_stop_enable) 2248 { 2249 int ret = -EOPNOTSUPP; 2250 2251 if (pl->phydev) 2252 ret = phy_init_eee(pl->phydev, clk_stop_enable); 2253 2254 return ret; 2255 } 2256 EXPORT_SYMBOL_GPL(phylink_init_eee); 2257 2258 /** 2259 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters 2260 * @pl: a pointer to a &struct phylink returned from phylink_create() 2261 * @eee: a pointer to a &struct ethtool_eee for the read parameters 2262 */ 2263 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee) 2264 { 2265 int ret = -EOPNOTSUPP; 2266 2267 ASSERT_RTNL(); 2268 2269 if (pl->phydev) 2270 ret = phy_ethtool_get_eee(pl->phydev, eee); 2271 2272 return ret; 2273 } 2274 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee); 2275 2276 /** 2277 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters 2278 * @pl: a pointer to a &struct phylink returned from phylink_create() 2279 * @eee: a pointer to a &struct ethtool_eee for the desired parameters 2280 */ 2281 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee) 2282 { 2283 int ret = -EOPNOTSUPP; 2284 2285 ASSERT_RTNL(); 2286 2287 if (pl->phydev) 2288 ret = phy_ethtool_set_eee(pl->phydev, eee); 2289 2290 return ret; 2291 } 2292 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee); 2293 2294 /* This emulates MII registers for a fixed-mode phy operating as per the 2295 * passed in state. "aneg" defines if we report negotiation is possible. 2296 * 2297 * FIXME: should deal with negotiation state too. 2298 */ 2299 static int phylink_mii_emul_read(unsigned int reg, 2300 struct phylink_link_state *state) 2301 { 2302 struct fixed_phy_status fs; 2303 unsigned long *lpa = state->lp_advertising; 2304 int val; 2305 2306 fs.link = state->link; 2307 fs.speed = state->speed; 2308 fs.duplex = state->duplex; 2309 fs.pause = test_bit(ETHTOOL_LINK_MODE_Pause_BIT, lpa); 2310 fs.asym_pause = test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, lpa); 2311 2312 val = swphy_read_reg(reg, &fs); 2313 if (reg == MII_BMSR) { 2314 if (!state->an_complete) 2315 val &= ~BMSR_ANEGCOMPLETE; 2316 } 2317 return val; 2318 } 2319 2320 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id, 2321 unsigned int reg) 2322 { 2323 struct phy_device *phydev = pl->phydev; 2324 int prtad, devad; 2325 2326 if (mdio_phy_id_is_c45(phy_id)) { 2327 prtad = mdio_phy_id_prtad(phy_id); 2328 devad = mdio_phy_id_devad(phy_id); 2329 devad = mdiobus_c45_addr(devad, reg); 2330 } else if (phydev->is_c45) { 2331 switch (reg) { 2332 case MII_BMCR: 2333 case MII_BMSR: 2334 case MII_PHYSID1: 2335 case MII_PHYSID2: 2336 devad = __ffs(phydev->c45_ids.mmds_present); 2337 break; 2338 case MII_ADVERTISE: 2339 case MII_LPA: 2340 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 2341 return -EINVAL; 2342 devad = MDIO_MMD_AN; 2343 if (reg == MII_ADVERTISE) 2344 reg = MDIO_AN_ADVERTISE; 2345 else 2346 reg = MDIO_AN_LPA; 2347 break; 2348 default: 2349 return -EINVAL; 2350 } 2351 prtad = phy_id; 2352 devad = mdiobus_c45_addr(devad, reg); 2353 } else { 2354 prtad = phy_id; 2355 devad = reg; 2356 } 2357 return mdiobus_read(pl->phydev->mdio.bus, prtad, devad); 2358 } 2359 2360 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id, 2361 unsigned int reg, unsigned int val) 2362 { 2363 struct phy_device *phydev = pl->phydev; 2364 int prtad, devad; 2365 2366 if (mdio_phy_id_is_c45(phy_id)) { 2367 prtad = mdio_phy_id_prtad(phy_id); 2368 devad = mdio_phy_id_devad(phy_id); 2369 devad = mdiobus_c45_addr(devad, reg); 2370 } else if (phydev->is_c45) { 2371 switch (reg) { 2372 case MII_BMCR: 2373 case MII_BMSR: 2374 case MII_PHYSID1: 2375 case MII_PHYSID2: 2376 devad = __ffs(phydev->c45_ids.mmds_present); 2377 break; 2378 case MII_ADVERTISE: 2379 case MII_LPA: 2380 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 2381 return -EINVAL; 2382 devad = MDIO_MMD_AN; 2383 if (reg == MII_ADVERTISE) 2384 reg = MDIO_AN_ADVERTISE; 2385 else 2386 reg = MDIO_AN_LPA; 2387 break; 2388 default: 2389 return -EINVAL; 2390 } 2391 prtad = phy_id; 2392 devad = mdiobus_c45_addr(devad, reg); 2393 } else { 2394 prtad = phy_id; 2395 devad = reg; 2396 } 2397 2398 return mdiobus_write(phydev->mdio.bus, prtad, devad, val); 2399 } 2400 2401 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id, 2402 unsigned int reg) 2403 { 2404 struct phylink_link_state state; 2405 int val = 0xffff; 2406 2407 switch (pl->cur_link_an_mode) { 2408 case MLO_AN_FIXED: 2409 if (phy_id == 0) { 2410 phylink_get_fixed_state(pl, &state); 2411 val = phylink_mii_emul_read(reg, &state); 2412 } 2413 break; 2414 2415 case MLO_AN_PHY: 2416 return -EOPNOTSUPP; 2417 2418 case MLO_AN_INBAND: 2419 if (phy_id == 0) { 2420 phylink_mac_pcs_get_state(pl, &state); 2421 val = phylink_mii_emul_read(reg, &state); 2422 } 2423 break; 2424 } 2425 2426 return val & 0xffff; 2427 } 2428 2429 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id, 2430 unsigned int reg, unsigned int val) 2431 { 2432 switch (pl->cur_link_an_mode) { 2433 case MLO_AN_FIXED: 2434 break; 2435 2436 case MLO_AN_PHY: 2437 return -EOPNOTSUPP; 2438 2439 case MLO_AN_INBAND: 2440 break; 2441 } 2442 2443 return 0; 2444 } 2445 2446 /** 2447 * phylink_mii_ioctl() - generic mii ioctl interface 2448 * @pl: a pointer to a &struct phylink returned from phylink_create() 2449 * @ifr: a pointer to a &struct ifreq for socket ioctls 2450 * @cmd: ioctl cmd to execute 2451 * 2452 * Perform the specified MII ioctl on the PHY attached to the phylink instance 2453 * specified by @pl. If no PHY is attached, emulate the presence of the PHY. 2454 * 2455 * Returns: zero on success or negative error code. 2456 * 2457 * %SIOCGMIIPHY: 2458 * read register from the current PHY. 2459 * %SIOCGMIIREG: 2460 * read register from the specified PHY. 2461 * %SIOCSMIIREG: 2462 * set a register on the specified PHY. 2463 */ 2464 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd) 2465 { 2466 struct mii_ioctl_data *mii = if_mii(ifr); 2467 int ret; 2468 2469 ASSERT_RTNL(); 2470 2471 if (pl->phydev) { 2472 /* PHYs only exist for MLO_AN_PHY and SGMII */ 2473 switch (cmd) { 2474 case SIOCGMIIPHY: 2475 mii->phy_id = pl->phydev->mdio.addr; 2476 fallthrough; 2477 2478 case SIOCGMIIREG: 2479 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num); 2480 if (ret >= 0) { 2481 mii->val_out = ret; 2482 ret = 0; 2483 } 2484 break; 2485 2486 case SIOCSMIIREG: 2487 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num, 2488 mii->val_in); 2489 break; 2490 2491 default: 2492 ret = phy_mii_ioctl(pl->phydev, ifr, cmd); 2493 break; 2494 } 2495 } else { 2496 switch (cmd) { 2497 case SIOCGMIIPHY: 2498 mii->phy_id = 0; 2499 fallthrough; 2500 2501 case SIOCGMIIREG: 2502 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num); 2503 if (ret >= 0) { 2504 mii->val_out = ret; 2505 ret = 0; 2506 } 2507 break; 2508 2509 case SIOCSMIIREG: 2510 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num, 2511 mii->val_in); 2512 break; 2513 2514 default: 2515 ret = -EOPNOTSUPP; 2516 break; 2517 } 2518 } 2519 2520 return ret; 2521 } 2522 EXPORT_SYMBOL_GPL(phylink_mii_ioctl); 2523 2524 /** 2525 * phylink_speed_down() - set the non-SFP PHY to lowest speed supported by both 2526 * link partners 2527 * @pl: a pointer to a &struct phylink returned from phylink_create() 2528 * @sync: perform action synchronously 2529 * 2530 * If we have a PHY that is not part of a SFP module, then set the speed 2531 * as described in the phy_speed_down() function. Please see this function 2532 * for a description of the @sync parameter. 2533 * 2534 * Returns zero if there is no PHY, otherwise as per phy_speed_down(). 2535 */ 2536 int phylink_speed_down(struct phylink *pl, bool sync) 2537 { 2538 int ret = 0; 2539 2540 ASSERT_RTNL(); 2541 2542 if (!pl->sfp_bus && pl->phydev) 2543 ret = phy_speed_down(pl->phydev, sync); 2544 2545 return ret; 2546 } 2547 EXPORT_SYMBOL_GPL(phylink_speed_down); 2548 2549 /** 2550 * phylink_speed_up() - restore the advertised speeds prior to the call to 2551 * phylink_speed_down() 2552 * @pl: a pointer to a &struct phylink returned from phylink_create() 2553 * 2554 * If we have a PHY that is not part of a SFP module, then restore the 2555 * PHY speeds as per phy_speed_up(). 2556 * 2557 * Returns zero if there is no PHY, otherwise as per phy_speed_up(). 2558 */ 2559 int phylink_speed_up(struct phylink *pl) 2560 { 2561 int ret = 0; 2562 2563 ASSERT_RTNL(); 2564 2565 if (!pl->sfp_bus && pl->phydev) 2566 ret = phy_speed_up(pl->phydev); 2567 2568 return ret; 2569 } 2570 EXPORT_SYMBOL_GPL(phylink_speed_up); 2571 2572 static void phylink_sfp_attach(void *upstream, struct sfp_bus *bus) 2573 { 2574 struct phylink *pl = upstream; 2575 2576 pl->netdev->sfp_bus = bus; 2577 } 2578 2579 static void phylink_sfp_detach(void *upstream, struct sfp_bus *bus) 2580 { 2581 struct phylink *pl = upstream; 2582 2583 pl->netdev->sfp_bus = NULL; 2584 } 2585 2586 static int phylink_sfp_config(struct phylink *pl, u8 mode, 2587 const unsigned long *supported, 2588 const unsigned long *advertising) 2589 { 2590 __ETHTOOL_DECLARE_LINK_MODE_MASK(support1); 2591 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 2592 struct phylink_link_state config; 2593 phy_interface_t iface; 2594 bool changed; 2595 int ret; 2596 2597 linkmode_copy(support, supported); 2598 2599 memset(&config, 0, sizeof(config)); 2600 linkmode_copy(config.advertising, advertising); 2601 config.interface = PHY_INTERFACE_MODE_NA; 2602 config.speed = SPEED_UNKNOWN; 2603 config.duplex = DUPLEX_UNKNOWN; 2604 config.pause = MLO_PAUSE_AN; 2605 config.an_enabled = pl->link_config.an_enabled; 2606 2607 /* Ignore errors if we're expecting a PHY to attach later */ 2608 ret = phylink_validate(pl, support, &config); 2609 if (ret) { 2610 phylink_err(pl, "validation with support %*pb failed: %d\n", 2611 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret); 2612 return ret; 2613 } 2614 2615 iface = sfp_select_interface(pl->sfp_bus, config.advertising); 2616 if (iface == PHY_INTERFACE_MODE_NA) { 2617 phylink_err(pl, 2618 "selection of interface failed, advertisement %*pb\n", 2619 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising); 2620 return -EINVAL; 2621 } 2622 2623 config.interface = iface; 2624 linkmode_copy(support1, support); 2625 ret = phylink_validate(pl, support1, &config); 2626 if (ret) { 2627 phylink_err(pl, "validation of %s/%s with support %*pb failed: %d\n", 2628 phylink_an_mode_str(mode), 2629 phy_modes(config.interface), 2630 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret); 2631 return ret; 2632 } 2633 2634 phylink_dbg(pl, "requesting link mode %s/%s with support %*pb\n", 2635 phylink_an_mode_str(mode), phy_modes(config.interface), 2636 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 2637 2638 if (phy_interface_mode_is_8023z(iface) && pl->phydev) 2639 return -EINVAL; 2640 2641 changed = !linkmode_equal(pl->supported, support) || 2642 !linkmode_equal(pl->link_config.advertising, 2643 config.advertising); 2644 if (changed) { 2645 linkmode_copy(pl->supported, support); 2646 linkmode_copy(pl->link_config.advertising, config.advertising); 2647 } 2648 2649 if (pl->cur_link_an_mode != mode || 2650 pl->link_config.interface != config.interface) { 2651 pl->link_config.interface = config.interface; 2652 pl->cur_link_an_mode = mode; 2653 2654 changed = true; 2655 2656 phylink_info(pl, "switched to %s/%s link mode\n", 2657 phylink_an_mode_str(mode), 2658 phy_modes(config.interface)); 2659 } 2660 2661 pl->link_port = pl->sfp_port; 2662 2663 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED, 2664 &pl->phylink_disable_state)) 2665 phylink_mac_initial_config(pl, false); 2666 2667 return ret; 2668 } 2669 2670 static int phylink_sfp_module_insert(void *upstream, 2671 const struct sfp_eeprom_id *id) 2672 { 2673 struct phylink *pl = upstream; 2674 unsigned long *support = pl->sfp_support; 2675 2676 ASSERT_RTNL(); 2677 2678 linkmode_zero(support); 2679 sfp_parse_support(pl->sfp_bus, id, support); 2680 pl->sfp_port = sfp_parse_port(pl->sfp_bus, id, support); 2681 2682 /* If this module may have a PHY connecting later, defer until later */ 2683 pl->sfp_may_have_phy = sfp_may_have_phy(pl->sfp_bus, id); 2684 if (pl->sfp_may_have_phy) 2685 return 0; 2686 2687 return phylink_sfp_config(pl, MLO_AN_INBAND, support, support); 2688 } 2689 2690 static int phylink_sfp_module_start(void *upstream) 2691 { 2692 struct phylink *pl = upstream; 2693 2694 /* If this SFP module has a PHY, start the PHY now. */ 2695 if (pl->phydev) { 2696 phy_start(pl->phydev); 2697 return 0; 2698 } 2699 2700 /* If the module may have a PHY but we didn't detect one we 2701 * need to configure the MAC here. 2702 */ 2703 if (!pl->sfp_may_have_phy) 2704 return 0; 2705 2706 return phylink_sfp_config(pl, MLO_AN_INBAND, 2707 pl->sfp_support, pl->sfp_support); 2708 } 2709 2710 static void phylink_sfp_module_stop(void *upstream) 2711 { 2712 struct phylink *pl = upstream; 2713 2714 /* If this SFP module has a PHY, stop it. */ 2715 if (pl->phydev) 2716 phy_stop(pl->phydev); 2717 } 2718 2719 static void phylink_sfp_link_down(void *upstream) 2720 { 2721 struct phylink *pl = upstream; 2722 2723 ASSERT_RTNL(); 2724 2725 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_LINK); 2726 } 2727 2728 static void phylink_sfp_link_up(void *upstream) 2729 { 2730 struct phylink *pl = upstream; 2731 2732 ASSERT_RTNL(); 2733 2734 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_LINK); 2735 } 2736 2737 /* The Broadcom BCM84881 in the Methode DM7052 is unable to provide a SGMII 2738 * or 802.3z control word, so inband will not work. 2739 */ 2740 static bool phylink_phy_no_inband(struct phy_device *phy) 2741 { 2742 return phy->is_c45 && 2743 (phy->c45_ids.device_ids[1] & 0xfffffff0) == 0xae025150; 2744 } 2745 2746 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy) 2747 { 2748 struct phylink *pl = upstream; 2749 phy_interface_t interface; 2750 u8 mode; 2751 int ret; 2752 2753 /* 2754 * This is the new way of dealing with flow control for PHYs, 2755 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 2756 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 2757 * using our validate call to the MAC, we rely upon the MAC 2758 * clearing the bits from both supported and advertising fields. 2759 */ 2760 phy_support_asym_pause(phy); 2761 2762 if (phylink_phy_no_inband(phy)) 2763 mode = MLO_AN_PHY; 2764 else 2765 mode = MLO_AN_INBAND; 2766 2767 /* Do the initial configuration */ 2768 ret = phylink_sfp_config(pl, mode, phy->supported, phy->advertising); 2769 if (ret < 0) 2770 return ret; 2771 2772 interface = pl->link_config.interface; 2773 ret = phylink_attach_phy(pl, phy, interface); 2774 if (ret < 0) 2775 return ret; 2776 2777 ret = phylink_bringup_phy(pl, phy, interface); 2778 if (ret) 2779 phy_detach(phy); 2780 2781 return ret; 2782 } 2783 2784 static void phylink_sfp_disconnect_phy(void *upstream) 2785 { 2786 phylink_disconnect_phy(upstream); 2787 } 2788 2789 static const struct sfp_upstream_ops sfp_phylink_ops = { 2790 .attach = phylink_sfp_attach, 2791 .detach = phylink_sfp_detach, 2792 .module_insert = phylink_sfp_module_insert, 2793 .module_start = phylink_sfp_module_start, 2794 .module_stop = phylink_sfp_module_stop, 2795 .link_up = phylink_sfp_link_up, 2796 .link_down = phylink_sfp_link_down, 2797 .connect_phy = phylink_sfp_connect_phy, 2798 .disconnect_phy = phylink_sfp_disconnect_phy, 2799 }; 2800 2801 /* Helpers for MAC drivers */ 2802 2803 /** 2804 * phylink_helper_basex_speed() - 1000BaseX/2500BaseX helper 2805 * @state: a pointer to a &struct phylink_link_state 2806 * 2807 * Inspect the interface mode, advertising mask or forced speed and 2808 * decide whether to run at 2.5Gbit or 1Gbit appropriately, switching 2809 * the interface mode to suit. @state->interface is appropriately 2810 * updated, and the advertising mask has the "other" baseX_Full flag 2811 * cleared. 2812 */ 2813 void phylink_helper_basex_speed(struct phylink_link_state *state) 2814 { 2815 if (phy_interface_mode_is_8023z(state->interface)) { 2816 bool want_2500 = state->an_enabled ? 2817 phylink_test(state->advertising, 2500baseX_Full) : 2818 state->speed == SPEED_2500; 2819 2820 if (want_2500) { 2821 phylink_clear(state->advertising, 1000baseX_Full); 2822 state->interface = PHY_INTERFACE_MODE_2500BASEX; 2823 } else { 2824 phylink_clear(state->advertising, 2500baseX_Full); 2825 state->interface = PHY_INTERFACE_MODE_1000BASEX; 2826 } 2827 } 2828 } 2829 EXPORT_SYMBOL_GPL(phylink_helper_basex_speed); 2830 2831 static void phylink_decode_c37_word(struct phylink_link_state *state, 2832 uint16_t config_reg, int speed) 2833 { 2834 bool tx_pause, rx_pause; 2835 int fd_bit; 2836 2837 if (speed == SPEED_2500) 2838 fd_bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT; 2839 else 2840 fd_bit = ETHTOOL_LINK_MODE_1000baseX_Full_BIT; 2841 2842 mii_lpa_mod_linkmode_x(state->lp_advertising, config_reg, fd_bit); 2843 2844 if (linkmode_test_bit(fd_bit, state->advertising) && 2845 linkmode_test_bit(fd_bit, state->lp_advertising)) { 2846 state->speed = speed; 2847 state->duplex = DUPLEX_FULL; 2848 } else { 2849 /* negotiation failure */ 2850 state->link = false; 2851 } 2852 2853 linkmode_resolve_pause(state->advertising, state->lp_advertising, 2854 &tx_pause, &rx_pause); 2855 2856 if (tx_pause) 2857 state->pause |= MLO_PAUSE_TX; 2858 if (rx_pause) 2859 state->pause |= MLO_PAUSE_RX; 2860 } 2861 2862 static void phylink_decode_sgmii_word(struct phylink_link_state *state, 2863 uint16_t config_reg) 2864 { 2865 if (!(config_reg & LPA_SGMII_LINK)) { 2866 state->link = false; 2867 return; 2868 } 2869 2870 switch (config_reg & LPA_SGMII_SPD_MASK) { 2871 case LPA_SGMII_10: 2872 state->speed = SPEED_10; 2873 break; 2874 case LPA_SGMII_100: 2875 state->speed = SPEED_100; 2876 break; 2877 case LPA_SGMII_1000: 2878 state->speed = SPEED_1000; 2879 break; 2880 default: 2881 state->link = false; 2882 return; 2883 } 2884 if (config_reg & LPA_SGMII_FULL_DUPLEX) 2885 state->duplex = DUPLEX_FULL; 2886 else 2887 state->duplex = DUPLEX_HALF; 2888 } 2889 2890 /** 2891 * phylink_decode_usxgmii_word() - decode the USXGMII word from a MAC PCS 2892 * @state: a pointer to a struct phylink_link_state. 2893 * @lpa: a 16 bit value which stores the USXGMII auto-negotiation word 2894 * 2895 * Helper for MAC PCS supporting the USXGMII protocol and the auto-negotiation 2896 * code word. Decode the USXGMII code word and populate the corresponding fields 2897 * (speed, duplex) into the phylink_link_state structure. 2898 */ 2899 void phylink_decode_usxgmii_word(struct phylink_link_state *state, 2900 uint16_t lpa) 2901 { 2902 switch (lpa & MDIO_USXGMII_SPD_MASK) { 2903 case MDIO_USXGMII_10: 2904 state->speed = SPEED_10; 2905 break; 2906 case MDIO_USXGMII_100: 2907 state->speed = SPEED_100; 2908 break; 2909 case MDIO_USXGMII_1000: 2910 state->speed = SPEED_1000; 2911 break; 2912 case MDIO_USXGMII_2500: 2913 state->speed = SPEED_2500; 2914 break; 2915 case MDIO_USXGMII_5000: 2916 state->speed = SPEED_5000; 2917 break; 2918 case MDIO_USXGMII_10G: 2919 state->speed = SPEED_10000; 2920 break; 2921 default: 2922 state->link = false; 2923 return; 2924 } 2925 2926 if (lpa & MDIO_USXGMII_FULL_DUPLEX) 2927 state->duplex = DUPLEX_FULL; 2928 else 2929 state->duplex = DUPLEX_HALF; 2930 } 2931 EXPORT_SYMBOL_GPL(phylink_decode_usxgmii_word); 2932 2933 /** 2934 * phylink_mii_c22_pcs_decode_state() - Decode MAC PCS state from MII registers 2935 * @state: a pointer to a &struct phylink_link_state. 2936 * @bmsr: The value of the %MII_BMSR register 2937 * @lpa: The value of the %MII_LPA register 2938 * 2939 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 2940 * clause 37 negotiation and/or SGMII control. 2941 * 2942 * Parse the Clause 37 or Cisco SGMII link partner negotiation word into 2943 * the phylink @state structure. This is suitable to be used for implementing 2944 * the mac_pcs_get_state() member of the struct phylink_mac_ops structure if 2945 * accessing @bmsr and @lpa cannot be done with MDIO directly. 2946 */ 2947 void phylink_mii_c22_pcs_decode_state(struct phylink_link_state *state, 2948 u16 bmsr, u16 lpa) 2949 { 2950 state->link = !!(bmsr & BMSR_LSTATUS); 2951 state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE); 2952 /* If there is no link or autonegotiation is disabled, the LP advertisement 2953 * data is not meaningful, so don't go any further. 2954 */ 2955 if (!state->link || !state->an_enabled) 2956 return; 2957 2958 switch (state->interface) { 2959 case PHY_INTERFACE_MODE_1000BASEX: 2960 phylink_decode_c37_word(state, lpa, SPEED_1000); 2961 break; 2962 2963 case PHY_INTERFACE_MODE_2500BASEX: 2964 phylink_decode_c37_word(state, lpa, SPEED_2500); 2965 break; 2966 2967 case PHY_INTERFACE_MODE_SGMII: 2968 case PHY_INTERFACE_MODE_QSGMII: 2969 phylink_decode_sgmii_word(state, lpa); 2970 break; 2971 2972 default: 2973 state->link = false; 2974 break; 2975 } 2976 } 2977 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_decode_state); 2978 2979 /** 2980 * phylink_mii_c22_pcs_get_state() - read the MAC PCS state 2981 * @pcs: a pointer to a &struct mdio_device. 2982 * @state: a pointer to a &struct phylink_link_state. 2983 * 2984 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 2985 * clause 37 negotiation and/or SGMII control. 2986 * 2987 * Read the MAC PCS state from the MII device configured in @config and 2988 * parse the Clause 37 or Cisco SGMII link partner negotiation word into 2989 * the phylink @state structure. This is suitable to be directly plugged 2990 * into the mac_pcs_get_state() member of the struct phylink_mac_ops 2991 * structure. 2992 */ 2993 void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs, 2994 struct phylink_link_state *state) 2995 { 2996 int bmsr, lpa; 2997 2998 bmsr = mdiodev_read(pcs, MII_BMSR); 2999 lpa = mdiodev_read(pcs, MII_LPA); 3000 if (bmsr < 0 || lpa < 0) { 3001 state->link = false; 3002 return; 3003 } 3004 3005 phylink_mii_c22_pcs_decode_state(state, bmsr, lpa); 3006 } 3007 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_get_state); 3008 3009 /** 3010 * phylink_mii_c22_pcs_encode_advertisement() - configure the clause 37 PCS 3011 * advertisement 3012 * @interface: the PHY interface mode being configured 3013 * @advertising: the ethtool advertisement mask 3014 * 3015 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 3016 * clause 37 negotiation and/or SGMII control. 3017 * 3018 * Encode the clause 37 PCS advertisement as specified by @interface and 3019 * @advertising. 3020 * 3021 * Return: The new value for @adv, or ``-EINVAL`` if it should not be changed. 3022 */ 3023 int phylink_mii_c22_pcs_encode_advertisement(phy_interface_t interface, 3024 const unsigned long *advertising) 3025 { 3026 u16 adv; 3027 3028 switch (interface) { 3029 case PHY_INTERFACE_MODE_1000BASEX: 3030 case PHY_INTERFACE_MODE_2500BASEX: 3031 adv = ADVERTISE_1000XFULL; 3032 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 3033 advertising)) 3034 adv |= ADVERTISE_1000XPAUSE; 3035 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 3036 advertising)) 3037 adv |= ADVERTISE_1000XPSE_ASYM; 3038 return adv; 3039 case PHY_INTERFACE_MODE_SGMII: 3040 return 0x0001; 3041 default: 3042 /* Nothing to do for other modes */ 3043 return -EINVAL; 3044 } 3045 } 3046 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_encode_advertisement); 3047 3048 /** 3049 * phylink_mii_c22_pcs_config() - configure clause 22 PCS 3050 * @pcs: a pointer to a &struct mdio_device. 3051 * @mode: link autonegotiation mode 3052 * @interface: the PHY interface mode being configured 3053 * @advertising: the ethtool advertisement mask 3054 * 3055 * Configure a Clause 22 PCS PHY with the appropriate negotiation 3056 * parameters for the @mode, @interface and @advertising parameters. 3057 * Returns negative error number on failure, zero if the advertisement 3058 * has not changed, or positive if there is a change. 3059 */ 3060 int phylink_mii_c22_pcs_config(struct mdio_device *pcs, unsigned int mode, 3061 phy_interface_t interface, 3062 const unsigned long *advertising) 3063 { 3064 bool changed = 0; 3065 u16 bmcr; 3066 int ret, adv; 3067 3068 adv = phylink_mii_c22_pcs_encode_advertisement(interface, advertising); 3069 if (adv >= 0) { 3070 ret = mdiobus_modify_changed(pcs->bus, pcs->addr, 3071 MII_ADVERTISE, 0xffff, adv); 3072 if (ret < 0) 3073 return ret; 3074 changed = ret; 3075 } 3076 3077 /* Ensure ISOLATE bit is disabled */ 3078 if (mode == MLO_AN_INBAND && 3079 linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, advertising)) 3080 bmcr = BMCR_ANENABLE; 3081 else 3082 bmcr = 0; 3083 3084 ret = mdiodev_modify(pcs, MII_BMCR, BMCR_ANENABLE | BMCR_ISOLATE, bmcr); 3085 if (ret < 0) 3086 return ret; 3087 3088 return changed; 3089 } 3090 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config); 3091 3092 /** 3093 * phylink_mii_c22_pcs_an_restart() - restart 802.3z autonegotiation 3094 * @pcs: a pointer to a &struct mdio_device. 3095 * 3096 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 3097 * clause 37 negotiation. 3098 * 3099 * Restart the clause 37 negotiation with the link partner. This is 3100 * suitable to be directly plugged into the mac_pcs_get_state() member 3101 * of the struct phylink_mac_ops structure. 3102 */ 3103 void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs) 3104 { 3105 int val = mdiodev_read(pcs, MII_BMCR); 3106 3107 if (val >= 0) { 3108 val |= BMCR_ANRESTART; 3109 3110 mdiodev_write(pcs, MII_BMCR, val); 3111 } 3112 } 3113 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_an_restart); 3114 3115 void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs, 3116 struct phylink_link_state *state) 3117 { 3118 struct mii_bus *bus = pcs->bus; 3119 int addr = pcs->addr; 3120 int stat; 3121 3122 stat = mdiobus_c45_read(bus, addr, MDIO_MMD_PCS, MDIO_STAT1); 3123 if (stat < 0) { 3124 state->link = false; 3125 return; 3126 } 3127 3128 state->link = !!(stat & MDIO_STAT1_LSTATUS); 3129 if (!state->link) 3130 return; 3131 3132 switch (state->interface) { 3133 case PHY_INTERFACE_MODE_10GBASER: 3134 state->speed = SPEED_10000; 3135 state->duplex = DUPLEX_FULL; 3136 break; 3137 3138 default: 3139 break; 3140 } 3141 } 3142 EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state); 3143 3144 MODULE_LICENSE("GPL v2"); 3145