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 PCS_STATE_DOWN = 0, 39 PCS_STATE_STARTING, 40 PCS_STATE_STARTED, 41 }; 42 43 /** 44 * struct phylink - internal data type for phylink 45 */ 46 struct phylink { 47 /* private: */ 48 struct net_device *netdev; 49 const struct phylink_mac_ops *mac_ops; 50 struct phylink_config *config; 51 struct phylink_pcs *pcs; 52 struct device *dev; 53 unsigned int old_link_state:1; 54 55 unsigned long phylink_disable_state; /* bitmask of disables */ 56 struct phy_device *phydev; 57 phy_interface_t link_interface; /* PHY_INTERFACE_xxx */ 58 u8 cfg_link_an_mode; /* MLO_AN_xxx */ 59 u8 cur_link_an_mode; 60 u8 link_port; /* The current non-phy ethtool port */ 61 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 62 63 /* The link configuration settings */ 64 struct phylink_link_state link_config; 65 66 /* The current settings */ 67 phy_interface_t cur_interface; 68 69 struct gpio_desc *link_gpio; 70 unsigned int link_irq; 71 struct timer_list link_poll; 72 void (*get_fixed_state)(struct net_device *dev, 73 struct phylink_link_state *s); 74 75 struct mutex state_mutex; 76 struct phylink_link_state phy_state; 77 struct work_struct resolve; 78 unsigned int pcs_neg_mode; 79 unsigned int pcs_state; 80 81 bool mac_link_dropped; 82 bool using_mac_select_pcs; 83 84 struct sfp_bus *sfp_bus; 85 bool sfp_may_have_phy; 86 DECLARE_PHY_INTERFACE_MASK(sfp_interfaces); 87 __ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support); 88 u8 sfp_port; 89 }; 90 91 #define phylink_printk(level, pl, fmt, ...) \ 92 do { \ 93 if ((pl)->config->type == PHYLINK_NETDEV) \ 94 netdev_printk(level, (pl)->netdev, fmt, ##__VA_ARGS__); \ 95 else if ((pl)->config->type == PHYLINK_DEV) \ 96 dev_printk(level, (pl)->dev, fmt, ##__VA_ARGS__); \ 97 } while (0) 98 99 #define phylink_err(pl, fmt, ...) \ 100 phylink_printk(KERN_ERR, pl, fmt, ##__VA_ARGS__) 101 #define phylink_warn(pl, fmt, ...) \ 102 phylink_printk(KERN_WARNING, pl, fmt, ##__VA_ARGS__) 103 #define phylink_info(pl, fmt, ...) \ 104 phylink_printk(KERN_INFO, pl, fmt, ##__VA_ARGS__) 105 #if defined(CONFIG_DYNAMIC_DEBUG) 106 #define phylink_dbg(pl, fmt, ...) \ 107 do { \ 108 if ((pl)->config->type == PHYLINK_NETDEV) \ 109 netdev_dbg((pl)->netdev, fmt, ##__VA_ARGS__); \ 110 else if ((pl)->config->type == PHYLINK_DEV) \ 111 dev_dbg((pl)->dev, fmt, ##__VA_ARGS__); \ 112 } while (0) 113 #elif defined(DEBUG) 114 #define phylink_dbg(pl, fmt, ...) \ 115 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__) 116 #else 117 #define phylink_dbg(pl, fmt, ...) \ 118 ({ \ 119 if (0) \ 120 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__); \ 121 }) 122 #endif 123 124 /** 125 * phylink_set_port_modes() - set the port type modes in the ethtool mask 126 * @mask: ethtool link mode mask 127 * 128 * Sets all the port type modes in the ethtool mask. MAC drivers should 129 * use this in their 'validate' callback. 130 */ 131 void phylink_set_port_modes(unsigned long *mask) 132 { 133 phylink_set(mask, TP); 134 phylink_set(mask, AUI); 135 phylink_set(mask, MII); 136 phylink_set(mask, FIBRE); 137 phylink_set(mask, BNC); 138 phylink_set(mask, Backplane); 139 } 140 EXPORT_SYMBOL_GPL(phylink_set_port_modes); 141 142 static int phylink_is_empty_linkmode(const unsigned long *linkmode) 143 { 144 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, }; 145 146 phylink_set_port_modes(tmp); 147 phylink_set(tmp, Autoneg); 148 phylink_set(tmp, Pause); 149 phylink_set(tmp, Asym_Pause); 150 151 return linkmode_subset(linkmode, tmp); 152 } 153 154 static const char *phylink_an_mode_str(unsigned int mode) 155 { 156 static const char *modestr[] = { 157 [MLO_AN_PHY] = "phy", 158 [MLO_AN_FIXED] = "fixed", 159 [MLO_AN_INBAND] = "inband", 160 }; 161 162 return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown"; 163 } 164 165 static unsigned int phylink_interface_signal_rate(phy_interface_t interface) 166 { 167 switch (interface) { 168 case PHY_INTERFACE_MODE_SGMII: 169 case PHY_INTERFACE_MODE_1000BASEX: /* 1.25Mbd */ 170 return 1250; 171 case PHY_INTERFACE_MODE_2500BASEX: /* 3.125Mbd */ 172 return 3125; 173 case PHY_INTERFACE_MODE_5GBASER: /* 5.15625Mbd */ 174 return 5156; 175 case PHY_INTERFACE_MODE_10GBASER: /* 10.3125Mbd */ 176 return 10313; 177 default: 178 return 0; 179 } 180 } 181 182 /** 183 * phylink_interface_max_speed() - get the maximum speed of a phy interface 184 * @interface: phy interface mode defined by &typedef phy_interface_t 185 * 186 * Determine the maximum speed of a phy interface. This is intended to help 187 * determine the correct speed to pass to the MAC when the phy is performing 188 * rate matching. 189 * 190 * Return: The maximum speed of @interface 191 */ 192 static int phylink_interface_max_speed(phy_interface_t interface) 193 { 194 switch (interface) { 195 case PHY_INTERFACE_MODE_100BASEX: 196 case PHY_INTERFACE_MODE_REVRMII: 197 case PHY_INTERFACE_MODE_RMII: 198 case PHY_INTERFACE_MODE_SMII: 199 case PHY_INTERFACE_MODE_REVMII: 200 case PHY_INTERFACE_MODE_MII: 201 return SPEED_100; 202 203 case PHY_INTERFACE_MODE_TBI: 204 case PHY_INTERFACE_MODE_MOCA: 205 case PHY_INTERFACE_MODE_RTBI: 206 case PHY_INTERFACE_MODE_1000BASEX: 207 case PHY_INTERFACE_MODE_1000BASEKX: 208 case PHY_INTERFACE_MODE_TRGMII: 209 case PHY_INTERFACE_MODE_RGMII_TXID: 210 case PHY_INTERFACE_MODE_RGMII_RXID: 211 case PHY_INTERFACE_MODE_RGMII_ID: 212 case PHY_INTERFACE_MODE_RGMII: 213 case PHY_INTERFACE_MODE_PSGMII: 214 case PHY_INTERFACE_MODE_QSGMII: 215 case PHY_INTERFACE_MODE_QUSGMII: 216 case PHY_INTERFACE_MODE_SGMII: 217 case PHY_INTERFACE_MODE_GMII: 218 return SPEED_1000; 219 220 case PHY_INTERFACE_MODE_2500BASEX: 221 return SPEED_2500; 222 223 case PHY_INTERFACE_MODE_5GBASER: 224 return SPEED_5000; 225 226 case PHY_INTERFACE_MODE_XGMII: 227 case PHY_INTERFACE_MODE_RXAUI: 228 case PHY_INTERFACE_MODE_XAUI: 229 case PHY_INTERFACE_MODE_10GBASER: 230 case PHY_INTERFACE_MODE_10GKR: 231 case PHY_INTERFACE_MODE_USXGMII: 232 return SPEED_10000; 233 234 case PHY_INTERFACE_MODE_25GBASER: 235 return SPEED_25000; 236 237 case PHY_INTERFACE_MODE_XLGMII: 238 return SPEED_40000; 239 240 case PHY_INTERFACE_MODE_INTERNAL: 241 case PHY_INTERFACE_MODE_NA: 242 case PHY_INTERFACE_MODE_MAX: 243 /* No idea! Garbage in, unknown out */ 244 return SPEED_UNKNOWN; 245 } 246 247 /* If we get here, someone forgot to add an interface mode above */ 248 WARN_ON_ONCE(1); 249 return SPEED_UNKNOWN; 250 } 251 252 /** 253 * phylink_caps_to_linkmodes() - Convert capabilities to ethtool link modes 254 * @linkmodes: ethtool linkmode mask (must be already initialised) 255 * @caps: bitmask of MAC capabilities 256 * 257 * Set all possible pause, speed and duplex linkmodes in @linkmodes that are 258 * supported by the @caps. @linkmodes must have been initialised previously. 259 */ 260 static void phylink_caps_to_linkmodes(unsigned long *linkmodes, 261 unsigned long caps) 262 { 263 if (caps & MAC_SYM_PAUSE) 264 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, linkmodes); 265 266 if (caps & MAC_ASYM_PAUSE) 267 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, linkmodes); 268 269 if (caps & MAC_10HD) { 270 __set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, linkmodes); 271 __set_bit(ETHTOOL_LINK_MODE_10baseT1S_Half_BIT, linkmodes); 272 __set_bit(ETHTOOL_LINK_MODE_10baseT1S_P2MP_Half_BIT, linkmodes); 273 } 274 275 if (caps & MAC_10FD) { 276 __set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, linkmodes); 277 __set_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT, linkmodes); 278 __set_bit(ETHTOOL_LINK_MODE_10baseT1S_Full_BIT, linkmodes); 279 } 280 281 if (caps & MAC_100HD) { 282 __set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, linkmodes); 283 __set_bit(ETHTOOL_LINK_MODE_100baseFX_Half_BIT, linkmodes); 284 } 285 286 if (caps & MAC_100FD) { 287 __set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, linkmodes); 288 __set_bit(ETHTOOL_LINK_MODE_100baseT1_Full_BIT, linkmodes); 289 __set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT, linkmodes); 290 } 291 292 if (caps & MAC_1000HD) 293 __set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, linkmodes); 294 295 if (caps & MAC_1000FD) { 296 __set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, linkmodes); 297 __set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, linkmodes); 298 __set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, linkmodes); 299 __set_bit(ETHTOOL_LINK_MODE_1000baseT1_Full_BIT, linkmodes); 300 } 301 302 if (caps & MAC_2500FD) { 303 __set_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, linkmodes); 304 __set_bit(ETHTOOL_LINK_MODE_2500baseX_Full_BIT, linkmodes); 305 } 306 307 if (caps & MAC_5000FD) 308 __set_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT, linkmodes); 309 310 if (caps & MAC_10000FD) { 311 __set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, linkmodes); 312 __set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, linkmodes); 313 __set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, linkmodes); 314 __set_bit(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT, linkmodes); 315 __set_bit(ETHTOOL_LINK_MODE_10000baseCR_Full_BIT, linkmodes); 316 __set_bit(ETHTOOL_LINK_MODE_10000baseSR_Full_BIT, linkmodes); 317 __set_bit(ETHTOOL_LINK_MODE_10000baseLR_Full_BIT, linkmodes); 318 __set_bit(ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT, linkmodes); 319 __set_bit(ETHTOOL_LINK_MODE_10000baseER_Full_BIT, linkmodes); 320 } 321 322 if (caps & MAC_25000FD) { 323 __set_bit(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT, linkmodes); 324 __set_bit(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT, linkmodes); 325 __set_bit(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT, linkmodes); 326 } 327 328 if (caps & MAC_40000FD) { 329 __set_bit(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT, linkmodes); 330 __set_bit(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT, linkmodes); 331 __set_bit(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT, linkmodes); 332 __set_bit(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT, linkmodes); 333 } 334 335 if (caps & MAC_50000FD) { 336 __set_bit(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT, linkmodes); 337 __set_bit(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT, linkmodes); 338 __set_bit(ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT, linkmodes); 339 __set_bit(ETHTOOL_LINK_MODE_50000baseKR_Full_BIT, linkmodes); 340 __set_bit(ETHTOOL_LINK_MODE_50000baseSR_Full_BIT, linkmodes); 341 __set_bit(ETHTOOL_LINK_MODE_50000baseCR_Full_BIT, linkmodes); 342 __set_bit(ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT, 343 linkmodes); 344 __set_bit(ETHTOOL_LINK_MODE_50000baseDR_Full_BIT, linkmodes); 345 } 346 347 if (caps & MAC_56000FD) { 348 __set_bit(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT, linkmodes); 349 __set_bit(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT, linkmodes); 350 __set_bit(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT, linkmodes); 351 __set_bit(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT, linkmodes); 352 } 353 354 if (caps & MAC_100000FD) { 355 __set_bit(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT, linkmodes); 356 __set_bit(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT, linkmodes); 357 __set_bit(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT, linkmodes); 358 __set_bit(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT, 359 linkmodes); 360 __set_bit(ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT, linkmodes); 361 __set_bit(ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT, linkmodes); 362 __set_bit(ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT, linkmodes); 363 __set_bit(ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT, 364 linkmodes); 365 __set_bit(ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT, linkmodes); 366 __set_bit(ETHTOOL_LINK_MODE_100000baseKR_Full_BIT, linkmodes); 367 __set_bit(ETHTOOL_LINK_MODE_100000baseSR_Full_BIT, linkmodes); 368 __set_bit(ETHTOOL_LINK_MODE_100000baseLR_ER_FR_Full_BIT, 369 linkmodes); 370 __set_bit(ETHTOOL_LINK_MODE_100000baseCR_Full_BIT, linkmodes); 371 __set_bit(ETHTOOL_LINK_MODE_100000baseDR_Full_BIT, linkmodes); 372 } 373 374 if (caps & MAC_200000FD) { 375 __set_bit(ETHTOOL_LINK_MODE_200000baseKR4_Full_BIT, linkmodes); 376 __set_bit(ETHTOOL_LINK_MODE_200000baseSR4_Full_BIT, linkmodes); 377 __set_bit(ETHTOOL_LINK_MODE_200000baseLR4_ER4_FR4_Full_BIT, 378 linkmodes); 379 __set_bit(ETHTOOL_LINK_MODE_200000baseDR4_Full_BIT, linkmodes); 380 __set_bit(ETHTOOL_LINK_MODE_200000baseCR4_Full_BIT, linkmodes); 381 __set_bit(ETHTOOL_LINK_MODE_200000baseKR2_Full_BIT, linkmodes); 382 __set_bit(ETHTOOL_LINK_MODE_200000baseSR2_Full_BIT, linkmodes); 383 __set_bit(ETHTOOL_LINK_MODE_200000baseLR2_ER2_FR2_Full_BIT, 384 linkmodes); 385 __set_bit(ETHTOOL_LINK_MODE_200000baseDR2_Full_BIT, linkmodes); 386 __set_bit(ETHTOOL_LINK_MODE_200000baseCR2_Full_BIT, linkmodes); 387 } 388 389 if (caps & MAC_400000FD) { 390 __set_bit(ETHTOOL_LINK_MODE_400000baseKR8_Full_BIT, linkmodes); 391 __set_bit(ETHTOOL_LINK_MODE_400000baseSR8_Full_BIT, linkmodes); 392 __set_bit(ETHTOOL_LINK_MODE_400000baseLR8_ER8_FR8_Full_BIT, 393 linkmodes); 394 __set_bit(ETHTOOL_LINK_MODE_400000baseDR8_Full_BIT, linkmodes); 395 __set_bit(ETHTOOL_LINK_MODE_400000baseCR8_Full_BIT, linkmodes); 396 __set_bit(ETHTOOL_LINK_MODE_400000baseKR4_Full_BIT, linkmodes); 397 __set_bit(ETHTOOL_LINK_MODE_400000baseSR4_Full_BIT, linkmodes); 398 __set_bit(ETHTOOL_LINK_MODE_400000baseLR4_ER4_FR4_Full_BIT, 399 linkmodes); 400 __set_bit(ETHTOOL_LINK_MODE_400000baseDR4_Full_BIT, linkmodes); 401 __set_bit(ETHTOOL_LINK_MODE_400000baseCR4_Full_BIT, linkmodes); 402 } 403 } 404 405 static struct { 406 unsigned long mask; 407 int speed; 408 unsigned int duplex; 409 } phylink_caps_params[] = { 410 { MAC_400000FD, SPEED_400000, DUPLEX_FULL }, 411 { MAC_200000FD, SPEED_200000, DUPLEX_FULL }, 412 { MAC_100000FD, SPEED_100000, DUPLEX_FULL }, 413 { MAC_56000FD, SPEED_56000, DUPLEX_FULL }, 414 { MAC_50000FD, SPEED_50000, DUPLEX_FULL }, 415 { MAC_40000FD, SPEED_40000, DUPLEX_FULL }, 416 { MAC_25000FD, SPEED_25000, DUPLEX_FULL }, 417 { MAC_20000FD, SPEED_20000, DUPLEX_FULL }, 418 { MAC_10000FD, SPEED_10000, DUPLEX_FULL }, 419 { MAC_5000FD, SPEED_5000, DUPLEX_FULL }, 420 { MAC_2500FD, SPEED_2500, DUPLEX_FULL }, 421 { MAC_1000FD, SPEED_1000, DUPLEX_FULL }, 422 { MAC_1000HD, SPEED_1000, DUPLEX_HALF }, 423 { MAC_100FD, SPEED_100, DUPLEX_FULL }, 424 { MAC_100HD, SPEED_100, DUPLEX_HALF }, 425 { MAC_10FD, SPEED_10, DUPLEX_FULL }, 426 { MAC_10HD, SPEED_10, DUPLEX_HALF }, 427 }; 428 429 /** 430 * phylink_limit_mac_speed - limit the phylink_config to a maximum speed 431 * @config: pointer to a &struct phylink_config 432 * @max_speed: maximum speed 433 * 434 * Mask off MAC capabilities for speeds higher than the @max_speed parameter. 435 * Any further motifications of config.mac_capabilities will override this. 436 */ 437 void phylink_limit_mac_speed(struct phylink_config *config, u32 max_speed) 438 { 439 int i; 440 441 for (i = 0; i < ARRAY_SIZE(phylink_caps_params) && 442 phylink_caps_params[i].speed > max_speed; i++) 443 config->mac_capabilities &= ~phylink_caps_params[i].mask; 444 } 445 EXPORT_SYMBOL_GPL(phylink_limit_mac_speed); 446 447 /** 448 * phylink_cap_from_speed_duplex - Get mac capability from speed/duplex 449 * @speed: the speed to search for 450 * @duplex: the duplex to search for 451 * 452 * Find the mac capability for a given speed and duplex. 453 * 454 * Return: A mask with the mac capability patching @speed and @duplex, or 0 if 455 * there were no matches. 456 */ 457 static unsigned long phylink_cap_from_speed_duplex(int speed, 458 unsigned int duplex) 459 { 460 int i; 461 462 for (i = 0; i < ARRAY_SIZE(phylink_caps_params); i++) { 463 if (speed == phylink_caps_params[i].speed && 464 duplex == phylink_caps_params[i].duplex) 465 return phylink_caps_params[i].mask; 466 } 467 468 return 0; 469 } 470 471 /** 472 * phylink_get_capabilities() - get capabilities for a given MAC 473 * @interface: phy interface mode defined by &typedef phy_interface_t 474 * @mac_capabilities: bitmask of MAC capabilities 475 * @rate_matching: type of rate matching being performed 476 * 477 * Get the MAC capabilities that are supported by the @interface mode and 478 * @mac_capabilities. 479 */ 480 static unsigned long phylink_get_capabilities(phy_interface_t interface, 481 unsigned long mac_capabilities, 482 int rate_matching) 483 { 484 int max_speed = phylink_interface_max_speed(interface); 485 unsigned long caps = MAC_SYM_PAUSE | MAC_ASYM_PAUSE; 486 unsigned long matched_caps = 0; 487 488 switch (interface) { 489 case PHY_INTERFACE_MODE_USXGMII: 490 caps |= MAC_10000FD | MAC_5000FD | MAC_2500FD; 491 fallthrough; 492 493 case PHY_INTERFACE_MODE_RGMII_TXID: 494 case PHY_INTERFACE_MODE_RGMII_RXID: 495 case PHY_INTERFACE_MODE_RGMII_ID: 496 case PHY_INTERFACE_MODE_RGMII: 497 case PHY_INTERFACE_MODE_PSGMII: 498 case PHY_INTERFACE_MODE_QSGMII: 499 case PHY_INTERFACE_MODE_QUSGMII: 500 case PHY_INTERFACE_MODE_SGMII: 501 case PHY_INTERFACE_MODE_GMII: 502 caps |= MAC_1000HD | MAC_1000FD; 503 fallthrough; 504 505 case PHY_INTERFACE_MODE_REVRMII: 506 case PHY_INTERFACE_MODE_RMII: 507 case PHY_INTERFACE_MODE_SMII: 508 case PHY_INTERFACE_MODE_REVMII: 509 case PHY_INTERFACE_MODE_MII: 510 caps |= MAC_10HD | MAC_10FD; 511 fallthrough; 512 513 case PHY_INTERFACE_MODE_100BASEX: 514 caps |= MAC_100HD | MAC_100FD; 515 break; 516 517 case PHY_INTERFACE_MODE_TBI: 518 case PHY_INTERFACE_MODE_MOCA: 519 case PHY_INTERFACE_MODE_RTBI: 520 case PHY_INTERFACE_MODE_1000BASEX: 521 caps |= MAC_1000HD; 522 fallthrough; 523 case PHY_INTERFACE_MODE_1000BASEKX: 524 case PHY_INTERFACE_MODE_TRGMII: 525 caps |= MAC_1000FD; 526 break; 527 528 case PHY_INTERFACE_MODE_2500BASEX: 529 caps |= MAC_2500FD; 530 break; 531 532 case PHY_INTERFACE_MODE_5GBASER: 533 caps |= MAC_5000FD; 534 break; 535 536 case PHY_INTERFACE_MODE_XGMII: 537 case PHY_INTERFACE_MODE_RXAUI: 538 case PHY_INTERFACE_MODE_XAUI: 539 case PHY_INTERFACE_MODE_10GBASER: 540 case PHY_INTERFACE_MODE_10GKR: 541 caps |= MAC_10000FD; 542 break; 543 544 case PHY_INTERFACE_MODE_25GBASER: 545 caps |= MAC_25000FD; 546 break; 547 548 case PHY_INTERFACE_MODE_XLGMII: 549 caps |= MAC_40000FD; 550 break; 551 552 case PHY_INTERFACE_MODE_INTERNAL: 553 caps |= ~0; 554 break; 555 556 case PHY_INTERFACE_MODE_NA: 557 case PHY_INTERFACE_MODE_MAX: 558 break; 559 } 560 561 switch (rate_matching) { 562 case RATE_MATCH_OPEN_LOOP: 563 /* TODO */ 564 fallthrough; 565 case RATE_MATCH_NONE: 566 matched_caps = 0; 567 break; 568 case RATE_MATCH_PAUSE: { 569 /* The MAC must support asymmetric pause towards the local 570 * device for this. We could allow just symmetric pause, but 571 * then we might have to renegotiate if the link partner 572 * doesn't support pause. This is because there's no way to 573 * accept pause frames without transmitting them if we only 574 * support symmetric pause. 575 */ 576 if (!(mac_capabilities & MAC_SYM_PAUSE) || 577 !(mac_capabilities & MAC_ASYM_PAUSE)) 578 break; 579 580 /* We can't adapt if the MAC doesn't support the interface's 581 * max speed at full duplex. 582 */ 583 if (mac_capabilities & 584 phylink_cap_from_speed_duplex(max_speed, DUPLEX_FULL)) { 585 /* Although a duplex-matching phy might exist, we 586 * conservatively remove these modes because the MAC 587 * will not be aware of the half-duplex nature of the 588 * link. 589 */ 590 matched_caps = GENMASK(__fls(caps), __fls(MAC_10HD)); 591 matched_caps &= ~(MAC_1000HD | MAC_100HD | MAC_10HD); 592 } 593 break; 594 } 595 case RATE_MATCH_CRS: 596 /* The MAC must support half duplex at the interface's max 597 * speed. 598 */ 599 if (mac_capabilities & 600 phylink_cap_from_speed_duplex(max_speed, DUPLEX_HALF)) { 601 matched_caps = GENMASK(__fls(caps), __fls(MAC_10HD)); 602 matched_caps &= mac_capabilities; 603 } 604 break; 605 } 606 607 return (caps & mac_capabilities) | matched_caps; 608 } 609 610 /** 611 * phylink_validate_mask_caps() - Restrict link modes based on caps 612 * @supported: ethtool bitmask for supported link modes. 613 * @state: pointer to a &struct phylink_link_state. 614 * @mac_capabilities: bitmask of MAC capabilities 615 * 616 * Calculate the supported link modes based on @mac_capabilities, and restrict 617 * @supported and @state based on that. Use this function if your capabiliies 618 * aren't constant, such as if they vary depending on the interface. 619 */ 620 static void phylink_validate_mask_caps(unsigned long *supported, 621 struct phylink_link_state *state, 622 unsigned long mac_capabilities) 623 { 624 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; 625 unsigned long caps; 626 627 phylink_set_port_modes(mask); 628 phylink_set(mask, Autoneg); 629 caps = phylink_get_capabilities(state->interface, mac_capabilities, 630 state->rate_matching); 631 phylink_caps_to_linkmodes(mask, caps); 632 633 linkmode_and(supported, supported, mask); 634 linkmode_and(state->advertising, state->advertising, mask); 635 } 636 637 static int phylink_validate_mac_and_pcs(struct phylink *pl, 638 unsigned long *supported, 639 struct phylink_link_state *state) 640 { 641 unsigned long capabilities; 642 struct phylink_pcs *pcs; 643 int ret; 644 645 /* Get the PCS for this interface mode */ 646 if (pl->using_mac_select_pcs) { 647 pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface); 648 if (IS_ERR(pcs)) 649 return PTR_ERR(pcs); 650 } else { 651 pcs = pl->pcs; 652 } 653 654 if (pcs) { 655 /* The PCS, if present, must be setup before phylink_create() 656 * has been called. If the ops is not initialised, print an 657 * error and backtrace rather than oopsing the kernel. 658 */ 659 if (!pcs->ops) { 660 phylink_err(pl, "interface %s: uninitialised PCS\n", 661 phy_modes(state->interface)); 662 dump_stack(); 663 return -EINVAL; 664 } 665 666 /* Validate the link parameters with the PCS */ 667 if (pcs->ops->pcs_validate) { 668 ret = pcs->ops->pcs_validate(pcs, supported, state); 669 if (ret < 0 || phylink_is_empty_linkmode(supported)) 670 return -EINVAL; 671 672 /* Ensure the advertising mask is a subset of the 673 * supported mask. 674 */ 675 linkmode_and(state->advertising, state->advertising, 676 supported); 677 } 678 } 679 680 /* Then validate the link parameters with the MAC */ 681 if (pl->mac_ops->mac_get_caps) 682 capabilities = pl->mac_ops->mac_get_caps(pl->config, 683 state->interface); 684 else 685 capabilities = pl->config->mac_capabilities; 686 687 phylink_validate_mask_caps(supported, state, capabilities); 688 689 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; 690 } 691 692 static int phylink_validate_mask(struct phylink *pl, unsigned long *supported, 693 struct phylink_link_state *state, 694 const unsigned long *interfaces) 695 { 696 __ETHTOOL_DECLARE_LINK_MODE_MASK(all_adv) = { 0, }; 697 __ETHTOOL_DECLARE_LINK_MODE_MASK(all_s) = { 0, }; 698 __ETHTOOL_DECLARE_LINK_MODE_MASK(s); 699 struct phylink_link_state t; 700 int intf; 701 702 for (intf = 0; intf < PHY_INTERFACE_MODE_MAX; intf++) { 703 if (test_bit(intf, interfaces)) { 704 linkmode_copy(s, supported); 705 706 t = *state; 707 t.interface = intf; 708 if (!phylink_validate_mac_and_pcs(pl, s, &t)) { 709 linkmode_or(all_s, all_s, s); 710 linkmode_or(all_adv, all_adv, t.advertising); 711 } 712 } 713 } 714 715 linkmode_copy(supported, all_s); 716 linkmode_copy(state->advertising, all_adv); 717 718 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; 719 } 720 721 static int phylink_validate(struct phylink *pl, unsigned long *supported, 722 struct phylink_link_state *state) 723 { 724 const unsigned long *interfaces = pl->config->supported_interfaces; 725 726 if (state->interface == PHY_INTERFACE_MODE_NA) 727 return phylink_validate_mask(pl, supported, state, interfaces); 728 729 if (!test_bit(state->interface, interfaces)) 730 return -EINVAL; 731 732 return phylink_validate_mac_and_pcs(pl, supported, state); 733 } 734 735 static int phylink_parse_fixedlink(struct phylink *pl, 736 const struct fwnode_handle *fwnode) 737 { 738 struct fwnode_handle *fixed_node; 739 bool pause, asym_pause, autoneg; 740 const struct phy_setting *s; 741 struct gpio_desc *desc; 742 u32 speed; 743 int ret; 744 745 fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link"); 746 if (fixed_node) { 747 ret = fwnode_property_read_u32(fixed_node, "speed", &speed); 748 749 pl->link_config.speed = speed; 750 pl->link_config.duplex = DUPLEX_HALF; 751 752 if (fwnode_property_read_bool(fixed_node, "full-duplex")) 753 pl->link_config.duplex = DUPLEX_FULL; 754 755 /* We treat the "pause" and "asym-pause" terminology as 756 * defining the link partner's ability. 757 */ 758 if (fwnode_property_read_bool(fixed_node, "pause")) 759 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 760 pl->link_config.lp_advertising); 761 if (fwnode_property_read_bool(fixed_node, "asym-pause")) 762 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 763 pl->link_config.lp_advertising); 764 765 if (ret == 0) { 766 desc = fwnode_gpiod_get_index(fixed_node, "link", 0, 767 GPIOD_IN, "?"); 768 769 if (!IS_ERR(desc)) 770 pl->link_gpio = desc; 771 else if (desc == ERR_PTR(-EPROBE_DEFER)) 772 ret = -EPROBE_DEFER; 773 } 774 fwnode_handle_put(fixed_node); 775 776 if (ret) 777 return ret; 778 } else { 779 u32 prop[5]; 780 781 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 782 NULL, 0); 783 if (ret != ARRAY_SIZE(prop)) { 784 phylink_err(pl, "broken fixed-link?\n"); 785 return -EINVAL; 786 } 787 788 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 789 prop, ARRAY_SIZE(prop)); 790 if (!ret) { 791 pl->link_config.duplex = prop[1] ? 792 DUPLEX_FULL : DUPLEX_HALF; 793 pl->link_config.speed = prop[2]; 794 if (prop[3]) 795 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 796 pl->link_config.lp_advertising); 797 if (prop[4]) 798 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 799 pl->link_config.lp_advertising); 800 } 801 } 802 803 if (pl->link_config.speed > SPEED_1000 && 804 pl->link_config.duplex != DUPLEX_FULL) 805 phylink_warn(pl, "fixed link specifies half duplex for %dMbps link?\n", 806 pl->link_config.speed); 807 808 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 809 linkmode_copy(pl->link_config.advertising, pl->supported); 810 phylink_validate(pl, pl->supported, &pl->link_config); 811 812 pause = phylink_test(pl->supported, Pause); 813 asym_pause = phylink_test(pl->supported, Asym_Pause); 814 autoneg = phylink_test(pl->supported, Autoneg); 815 s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex, 816 pl->supported, true); 817 linkmode_zero(pl->supported); 818 phylink_set(pl->supported, MII); 819 820 if (pause) 821 phylink_set(pl->supported, Pause); 822 823 if (asym_pause) 824 phylink_set(pl->supported, Asym_Pause); 825 826 if (autoneg) 827 phylink_set(pl->supported, Autoneg); 828 829 if (s) { 830 __set_bit(s->bit, pl->supported); 831 __set_bit(s->bit, pl->link_config.lp_advertising); 832 } else { 833 phylink_warn(pl, "fixed link %s duplex %dMbps not recognised\n", 834 pl->link_config.duplex == DUPLEX_FULL ? "full" : "half", 835 pl->link_config.speed); 836 } 837 838 linkmode_and(pl->link_config.advertising, pl->link_config.advertising, 839 pl->supported); 840 841 pl->link_config.link = 1; 842 pl->link_config.an_complete = 1; 843 844 return 0; 845 } 846 847 static int phylink_parse_mode(struct phylink *pl, 848 const struct fwnode_handle *fwnode) 849 { 850 struct fwnode_handle *dn; 851 const char *managed; 852 853 dn = fwnode_get_named_child_node(fwnode, "fixed-link"); 854 if (dn || fwnode_property_present(fwnode, "fixed-link")) 855 pl->cfg_link_an_mode = MLO_AN_FIXED; 856 fwnode_handle_put(dn); 857 858 if ((fwnode_property_read_string(fwnode, "managed", &managed) == 0 && 859 strcmp(managed, "in-band-status") == 0) || 860 pl->config->ovr_an_inband) { 861 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 862 phylink_err(pl, 863 "can't use both fixed-link and in-band-status\n"); 864 return -EINVAL; 865 } 866 867 linkmode_zero(pl->supported); 868 phylink_set(pl->supported, MII); 869 phylink_set(pl->supported, Autoneg); 870 phylink_set(pl->supported, Asym_Pause); 871 phylink_set(pl->supported, Pause); 872 pl->cfg_link_an_mode = MLO_AN_INBAND; 873 874 switch (pl->link_config.interface) { 875 case PHY_INTERFACE_MODE_SGMII: 876 case PHY_INTERFACE_MODE_PSGMII: 877 case PHY_INTERFACE_MODE_QSGMII: 878 case PHY_INTERFACE_MODE_QUSGMII: 879 case PHY_INTERFACE_MODE_RGMII: 880 case PHY_INTERFACE_MODE_RGMII_ID: 881 case PHY_INTERFACE_MODE_RGMII_RXID: 882 case PHY_INTERFACE_MODE_RGMII_TXID: 883 case PHY_INTERFACE_MODE_RTBI: 884 phylink_set(pl->supported, 10baseT_Half); 885 phylink_set(pl->supported, 10baseT_Full); 886 phylink_set(pl->supported, 100baseT_Half); 887 phylink_set(pl->supported, 100baseT_Full); 888 phylink_set(pl->supported, 1000baseT_Half); 889 phylink_set(pl->supported, 1000baseT_Full); 890 break; 891 892 case PHY_INTERFACE_MODE_1000BASEX: 893 phylink_set(pl->supported, 1000baseX_Full); 894 break; 895 896 case PHY_INTERFACE_MODE_2500BASEX: 897 phylink_set(pl->supported, 2500baseX_Full); 898 break; 899 900 case PHY_INTERFACE_MODE_5GBASER: 901 phylink_set(pl->supported, 5000baseT_Full); 902 break; 903 904 case PHY_INTERFACE_MODE_25GBASER: 905 phylink_set(pl->supported, 25000baseCR_Full); 906 phylink_set(pl->supported, 25000baseKR_Full); 907 phylink_set(pl->supported, 25000baseSR_Full); 908 fallthrough; 909 case PHY_INTERFACE_MODE_USXGMII: 910 case PHY_INTERFACE_MODE_10GKR: 911 case PHY_INTERFACE_MODE_10GBASER: 912 phylink_set(pl->supported, 10baseT_Half); 913 phylink_set(pl->supported, 10baseT_Full); 914 phylink_set(pl->supported, 100baseT_Half); 915 phylink_set(pl->supported, 100baseT_Full); 916 phylink_set(pl->supported, 1000baseT_Half); 917 phylink_set(pl->supported, 1000baseT_Full); 918 phylink_set(pl->supported, 1000baseX_Full); 919 phylink_set(pl->supported, 1000baseKX_Full); 920 phylink_set(pl->supported, 2500baseT_Full); 921 phylink_set(pl->supported, 2500baseX_Full); 922 phylink_set(pl->supported, 5000baseT_Full); 923 phylink_set(pl->supported, 10000baseT_Full); 924 phylink_set(pl->supported, 10000baseKR_Full); 925 phylink_set(pl->supported, 10000baseKX4_Full); 926 phylink_set(pl->supported, 10000baseCR_Full); 927 phylink_set(pl->supported, 10000baseSR_Full); 928 phylink_set(pl->supported, 10000baseLR_Full); 929 phylink_set(pl->supported, 10000baseLRM_Full); 930 phylink_set(pl->supported, 10000baseER_Full); 931 break; 932 933 case PHY_INTERFACE_MODE_XLGMII: 934 phylink_set(pl->supported, 25000baseCR_Full); 935 phylink_set(pl->supported, 25000baseKR_Full); 936 phylink_set(pl->supported, 25000baseSR_Full); 937 phylink_set(pl->supported, 40000baseKR4_Full); 938 phylink_set(pl->supported, 40000baseCR4_Full); 939 phylink_set(pl->supported, 40000baseSR4_Full); 940 phylink_set(pl->supported, 40000baseLR4_Full); 941 phylink_set(pl->supported, 50000baseCR2_Full); 942 phylink_set(pl->supported, 50000baseKR2_Full); 943 phylink_set(pl->supported, 50000baseSR2_Full); 944 phylink_set(pl->supported, 50000baseKR_Full); 945 phylink_set(pl->supported, 50000baseSR_Full); 946 phylink_set(pl->supported, 50000baseCR_Full); 947 phylink_set(pl->supported, 50000baseLR_ER_FR_Full); 948 phylink_set(pl->supported, 50000baseDR_Full); 949 phylink_set(pl->supported, 100000baseKR4_Full); 950 phylink_set(pl->supported, 100000baseSR4_Full); 951 phylink_set(pl->supported, 100000baseCR4_Full); 952 phylink_set(pl->supported, 100000baseLR4_ER4_Full); 953 phylink_set(pl->supported, 100000baseKR2_Full); 954 phylink_set(pl->supported, 100000baseSR2_Full); 955 phylink_set(pl->supported, 100000baseCR2_Full); 956 phylink_set(pl->supported, 100000baseLR2_ER2_FR2_Full); 957 phylink_set(pl->supported, 100000baseDR2_Full); 958 break; 959 960 default: 961 phylink_err(pl, 962 "incorrect link mode %s for in-band status\n", 963 phy_modes(pl->link_config.interface)); 964 return -EINVAL; 965 } 966 967 linkmode_copy(pl->link_config.advertising, pl->supported); 968 969 if (phylink_validate(pl, pl->supported, &pl->link_config)) { 970 phylink_err(pl, 971 "failed to validate link configuration for in-band status\n"); 972 return -EINVAL; 973 } 974 } 975 976 return 0; 977 } 978 979 static void phylink_apply_manual_flow(struct phylink *pl, 980 struct phylink_link_state *state) 981 { 982 /* If autoneg is disabled, pause AN is also disabled */ 983 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 984 state->advertising)) 985 state->pause &= ~MLO_PAUSE_AN; 986 987 /* Manual configuration of pause modes */ 988 if (!(pl->link_config.pause & MLO_PAUSE_AN)) 989 state->pause = pl->link_config.pause; 990 } 991 992 static void phylink_resolve_an_pause(struct phylink_link_state *state) 993 { 994 bool tx_pause, rx_pause; 995 996 if (state->duplex == DUPLEX_FULL) { 997 linkmode_resolve_pause(state->advertising, 998 state->lp_advertising, 999 &tx_pause, &rx_pause); 1000 if (tx_pause) 1001 state->pause |= MLO_PAUSE_TX; 1002 if (rx_pause) 1003 state->pause |= MLO_PAUSE_RX; 1004 } 1005 } 1006 1007 static void phylink_pcs_pre_config(struct phylink_pcs *pcs, 1008 phy_interface_t interface) 1009 { 1010 if (pcs && pcs->ops->pcs_pre_config) 1011 pcs->ops->pcs_pre_config(pcs, interface); 1012 } 1013 1014 static int phylink_pcs_post_config(struct phylink_pcs *pcs, 1015 phy_interface_t interface) 1016 { 1017 int err = 0; 1018 1019 if (pcs && pcs->ops->pcs_post_config) 1020 err = pcs->ops->pcs_post_config(pcs, interface); 1021 1022 return err; 1023 } 1024 1025 static void phylink_pcs_disable(struct phylink_pcs *pcs) 1026 { 1027 if (pcs && pcs->ops->pcs_disable) 1028 pcs->ops->pcs_disable(pcs); 1029 } 1030 1031 static int phylink_pcs_enable(struct phylink_pcs *pcs) 1032 { 1033 int err = 0; 1034 1035 if (pcs && pcs->ops->pcs_enable) 1036 err = pcs->ops->pcs_enable(pcs); 1037 1038 return err; 1039 } 1040 1041 static int phylink_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode, 1042 const struct phylink_link_state *state, 1043 bool permit_pause_to_mac) 1044 { 1045 if (!pcs) 1046 return 0; 1047 1048 return pcs->ops->pcs_config(pcs, neg_mode, state->interface, 1049 state->advertising, permit_pause_to_mac); 1050 } 1051 1052 static void phylink_pcs_link_up(struct phylink_pcs *pcs, unsigned int neg_mode, 1053 phy_interface_t interface, int speed, 1054 int duplex) 1055 { 1056 if (pcs && pcs->ops->pcs_link_up) 1057 pcs->ops->pcs_link_up(pcs, neg_mode, interface, speed, duplex); 1058 } 1059 1060 static void phylink_pcs_poll_stop(struct phylink *pl) 1061 { 1062 if (pl->cfg_link_an_mode == MLO_AN_INBAND) 1063 del_timer(&pl->link_poll); 1064 } 1065 1066 static void phylink_pcs_poll_start(struct phylink *pl) 1067 { 1068 if (pl->pcs && pl->pcs->poll && pl->cfg_link_an_mode == MLO_AN_INBAND) 1069 mod_timer(&pl->link_poll, jiffies + HZ); 1070 } 1071 1072 static void phylink_mac_config(struct phylink *pl, 1073 const struct phylink_link_state *state) 1074 { 1075 struct phylink_link_state st = *state; 1076 1077 /* Stop drivers incorrectly using these */ 1078 linkmode_zero(st.lp_advertising); 1079 st.speed = SPEED_UNKNOWN; 1080 st.duplex = DUPLEX_UNKNOWN; 1081 st.an_complete = false; 1082 st.link = false; 1083 1084 phylink_dbg(pl, 1085 "%s: mode=%s/%s/%s adv=%*pb pause=%02x\n", 1086 __func__, phylink_an_mode_str(pl->cur_link_an_mode), 1087 phy_modes(st.interface), 1088 phy_rate_matching_to_str(st.rate_matching), 1089 __ETHTOOL_LINK_MODE_MASK_NBITS, st.advertising, 1090 st.pause); 1091 1092 pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, &st); 1093 } 1094 1095 static void phylink_pcs_an_restart(struct phylink *pl) 1096 { 1097 if (pl->pcs && linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 1098 pl->link_config.advertising) && 1099 phy_interface_mode_is_8023z(pl->link_config.interface) && 1100 phylink_autoneg_inband(pl->cur_link_an_mode)) 1101 pl->pcs->ops->pcs_an_restart(pl->pcs); 1102 } 1103 1104 static void phylink_major_config(struct phylink *pl, bool restart, 1105 const struct phylink_link_state *state) 1106 { 1107 struct phylink_pcs *pcs = NULL; 1108 bool pcs_changed = false; 1109 unsigned int rate_kbd; 1110 unsigned int neg_mode; 1111 int err; 1112 1113 phylink_dbg(pl, "major config %s\n", phy_modes(state->interface)); 1114 1115 pl->pcs_neg_mode = phylink_pcs_neg_mode(pl->cur_link_an_mode, 1116 state->interface, 1117 state->advertising); 1118 1119 if (pl->using_mac_select_pcs) { 1120 pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface); 1121 if (IS_ERR(pcs)) { 1122 phylink_err(pl, 1123 "mac_select_pcs unexpectedly failed: %pe\n", 1124 pcs); 1125 return; 1126 } 1127 1128 pcs_changed = pcs && pl->pcs != pcs; 1129 } 1130 1131 phylink_pcs_poll_stop(pl); 1132 1133 if (pl->mac_ops->mac_prepare) { 1134 err = pl->mac_ops->mac_prepare(pl->config, pl->cur_link_an_mode, 1135 state->interface); 1136 if (err < 0) { 1137 phylink_err(pl, "mac_prepare failed: %pe\n", 1138 ERR_PTR(err)); 1139 return; 1140 } 1141 } 1142 1143 /* If we have a new PCS, switch to the new PCS after preparing the MAC 1144 * for the change. 1145 */ 1146 if (pcs_changed) { 1147 phylink_pcs_disable(pl->pcs); 1148 1149 if (pl->pcs) 1150 pl->pcs->phylink = NULL; 1151 1152 pcs->phylink = pl; 1153 1154 pl->pcs = pcs; 1155 } 1156 1157 if (pl->pcs) 1158 phylink_pcs_pre_config(pl->pcs, state->interface); 1159 1160 phylink_mac_config(pl, state); 1161 1162 if (pl->pcs) 1163 phylink_pcs_post_config(pl->pcs, state->interface); 1164 1165 if (pl->pcs_state == PCS_STATE_STARTING || pcs_changed) 1166 phylink_pcs_enable(pl->pcs); 1167 1168 neg_mode = pl->cur_link_an_mode; 1169 if (pl->pcs && pl->pcs->neg_mode) 1170 neg_mode = pl->pcs_neg_mode; 1171 1172 err = phylink_pcs_config(pl->pcs, neg_mode, state, 1173 !!(pl->link_config.pause & MLO_PAUSE_AN)); 1174 if (err < 0) 1175 phylink_err(pl, "pcs_config failed: %pe\n", 1176 ERR_PTR(err)); 1177 else if (err > 0) 1178 restart = true; 1179 1180 if (restart) 1181 phylink_pcs_an_restart(pl); 1182 1183 if (pl->mac_ops->mac_finish) { 1184 err = pl->mac_ops->mac_finish(pl->config, pl->cur_link_an_mode, 1185 state->interface); 1186 if (err < 0) 1187 phylink_err(pl, "mac_finish failed: %pe\n", 1188 ERR_PTR(err)); 1189 } 1190 1191 if (pl->sfp_bus) { 1192 rate_kbd = phylink_interface_signal_rate(state->interface); 1193 if (rate_kbd) 1194 sfp_upstream_set_signal_rate(pl->sfp_bus, rate_kbd); 1195 } 1196 1197 phylink_pcs_poll_start(pl); 1198 } 1199 1200 /* 1201 * Reconfigure for a change of inband advertisement. 1202 * If we have a separate PCS, we only need to call its pcs_config() method, 1203 * and then restart AN if it indicates something changed. Otherwise, we do 1204 * the full MAC reconfiguration. 1205 */ 1206 static int phylink_change_inband_advert(struct phylink *pl) 1207 { 1208 unsigned int neg_mode; 1209 int ret; 1210 1211 if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) 1212 return 0; 1213 1214 phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__, 1215 phylink_an_mode_str(pl->cur_link_an_mode), 1216 phy_modes(pl->link_config.interface), 1217 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->link_config.advertising, 1218 pl->link_config.pause); 1219 1220 /* Recompute the PCS neg mode */ 1221 pl->pcs_neg_mode = phylink_pcs_neg_mode(pl->cur_link_an_mode, 1222 pl->link_config.interface, 1223 pl->link_config.advertising); 1224 1225 neg_mode = pl->cur_link_an_mode; 1226 if (pl->pcs->neg_mode) 1227 neg_mode = pl->pcs_neg_mode; 1228 1229 /* Modern PCS-based method; update the advert at the PCS, and 1230 * restart negotiation if the pcs_config() helper indicates that 1231 * the programmed advertisement has changed. 1232 */ 1233 ret = phylink_pcs_config(pl->pcs, neg_mode, &pl->link_config, 1234 !!(pl->link_config.pause & MLO_PAUSE_AN)); 1235 if (ret < 0) 1236 return ret; 1237 1238 if (ret > 0) 1239 phylink_pcs_an_restart(pl); 1240 1241 return 0; 1242 } 1243 1244 static void phylink_mac_pcs_get_state(struct phylink *pl, 1245 struct phylink_link_state *state) 1246 { 1247 linkmode_copy(state->advertising, pl->link_config.advertising); 1248 linkmode_zero(state->lp_advertising); 1249 state->interface = pl->link_config.interface; 1250 state->rate_matching = pl->link_config.rate_matching; 1251 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 1252 state->advertising)) { 1253 state->speed = SPEED_UNKNOWN; 1254 state->duplex = DUPLEX_UNKNOWN; 1255 state->pause = MLO_PAUSE_NONE; 1256 } else { 1257 state->speed = pl->link_config.speed; 1258 state->duplex = pl->link_config.duplex; 1259 state->pause = pl->link_config.pause; 1260 } 1261 state->an_complete = 0; 1262 state->link = 1; 1263 1264 if (pl->pcs) 1265 pl->pcs->ops->pcs_get_state(pl->pcs, state); 1266 else 1267 state->link = 0; 1268 } 1269 1270 /* The fixed state is... fixed except for the link state, 1271 * which may be determined by a GPIO or a callback. 1272 */ 1273 static void phylink_get_fixed_state(struct phylink *pl, 1274 struct phylink_link_state *state) 1275 { 1276 *state = pl->link_config; 1277 if (pl->config->get_fixed_state) 1278 pl->config->get_fixed_state(pl->config, state); 1279 else if (pl->link_gpio) 1280 state->link = !!gpiod_get_value_cansleep(pl->link_gpio); 1281 1282 state->pause = MLO_PAUSE_NONE; 1283 phylink_resolve_an_pause(state); 1284 } 1285 1286 static void phylink_mac_initial_config(struct phylink *pl, bool force_restart) 1287 { 1288 struct phylink_link_state link_state; 1289 1290 switch (pl->cur_link_an_mode) { 1291 case MLO_AN_PHY: 1292 link_state = pl->phy_state; 1293 break; 1294 1295 case MLO_AN_FIXED: 1296 phylink_get_fixed_state(pl, &link_state); 1297 break; 1298 1299 case MLO_AN_INBAND: 1300 link_state = pl->link_config; 1301 if (link_state.interface == PHY_INTERFACE_MODE_SGMII) 1302 link_state.pause = MLO_PAUSE_NONE; 1303 break; 1304 1305 default: /* can't happen */ 1306 return; 1307 } 1308 1309 link_state.link = false; 1310 1311 phylink_apply_manual_flow(pl, &link_state); 1312 phylink_major_config(pl, force_restart, &link_state); 1313 } 1314 1315 static const char *phylink_pause_to_str(int pause) 1316 { 1317 switch (pause & MLO_PAUSE_TXRX_MASK) { 1318 case MLO_PAUSE_TX | MLO_PAUSE_RX: 1319 return "rx/tx"; 1320 case MLO_PAUSE_TX: 1321 return "tx"; 1322 case MLO_PAUSE_RX: 1323 return "rx"; 1324 default: 1325 return "off"; 1326 } 1327 } 1328 1329 static void phylink_link_up(struct phylink *pl, 1330 struct phylink_link_state link_state) 1331 { 1332 struct net_device *ndev = pl->netdev; 1333 unsigned int neg_mode; 1334 int speed, duplex; 1335 bool rx_pause; 1336 1337 speed = link_state.speed; 1338 duplex = link_state.duplex; 1339 rx_pause = !!(link_state.pause & MLO_PAUSE_RX); 1340 1341 switch (link_state.rate_matching) { 1342 case RATE_MATCH_PAUSE: 1343 /* The PHY is doing rate matchion from the media rate (in 1344 * the link_state) to the interface speed, and will send 1345 * pause frames to the MAC to limit its transmission speed. 1346 */ 1347 speed = phylink_interface_max_speed(link_state.interface); 1348 duplex = DUPLEX_FULL; 1349 rx_pause = true; 1350 break; 1351 1352 case RATE_MATCH_CRS: 1353 /* The PHY is doing rate matchion from the media rate (in 1354 * the link_state) to the interface speed, and will cause 1355 * collisions to the MAC to limit its transmission speed. 1356 */ 1357 speed = phylink_interface_max_speed(link_state.interface); 1358 duplex = DUPLEX_HALF; 1359 break; 1360 } 1361 1362 pl->cur_interface = link_state.interface; 1363 1364 neg_mode = pl->cur_link_an_mode; 1365 if (pl->pcs && pl->pcs->neg_mode) 1366 neg_mode = pl->pcs_neg_mode; 1367 1368 phylink_pcs_link_up(pl->pcs, neg_mode, pl->cur_interface, speed, 1369 duplex); 1370 1371 pl->mac_ops->mac_link_up(pl->config, pl->phydev, pl->cur_link_an_mode, 1372 pl->cur_interface, speed, duplex, 1373 !!(link_state.pause & MLO_PAUSE_TX), rx_pause); 1374 1375 if (ndev) 1376 netif_carrier_on(ndev); 1377 1378 phylink_info(pl, 1379 "Link is Up - %s/%s - flow control %s\n", 1380 phy_speed_to_str(link_state.speed), 1381 phy_duplex_to_str(link_state.duplex), 1382 phylink_pause_to_str(link_state.pause)); 1383 } 1384 1385 static void phylink_link_down(struct phylink *pl) 1386 { 1387 struct net_device *ndev = pl->netdev; 1388 1389 if (ndev) 1390 netif_carrier_off(ndev); 1391 pl->mac_ops->mac_link_down(pl->config, pl->cur_link_an_mode, 1392 pl->cur_interface); 1393 phylink_info(pl, "Link is Down\n"); 1394 } 1395 1396 static void phylink_resolve(struct work_struct *w) 1397 { 1398 struct phylink *pl = container_of(w, struct phylink, resolve); 1399 struct phylink_link_state link_state; 1400 struct net_device *ndev = pl->netdev; 1401 bool mac_config = false; 1402 bool retrigger = false; 1403 bool cur_link_state; 1404 1405 mutex_lock(&pl->state_mutex); 1406 if (pl->netdev) 1407 cur_link_state = netif_carrier_ok(ndev); 1408 else 1409 cur_link_state = pl->old_link_state; 1410 1411 if (pl->phylink_disable_state) { 1412 pl->mac_link_dropped = false; 1413 link_state.link = false; 1414 } else if (pl->mac_link_dropped) { 1415 link_state.link = false; 1416 retrigger = true; 1417 } else { 1418 switch (pl->cur_link_an_mode) { 1419 case MLO_AN_PHY: 1420 link_state = pl->phy_state; 1421 phylink_apply_manual_flow(pl, &link_state); 1422 mac_config = link_state.link; 1423 break; 1424 1425 case MLO_AN_FIXED: 1426 phylink_get_fixed_state(pl, &link_state); 1427 mac_config = link_state.link; 1428 break; 1429 1430 case MLO_AN_INBAND: 1431 phylink_mac_pcs_get_state(pl, &link_state); 1432 1433 /* The PCS may have a latching link-fail indicator. 1434 * If the link was up, bring the link down and 1435 * re-trigger the resolve. Otherwise, re-read the 1436 * PCS state to get the current status of the link. 1437 */ 1438 if (!link_state.link) { 1439 if (cur_link_state) 1440 retrigger = true; 1441 else 1442 phylink_mac_pcs_get_state(pl, 1443 &link_state); 1444 } 1445 1446 /* If we have a phy, the "up" state is the union of 1447 * both the PHY and the MAC 1448 */ 1449 if (pl->phydev) 1450 link_state.link &= pl->phy_state.link; 1451 1452 /* Only update if the PHY link is up */ 1453 if (pl->phydev && pl->phy_state.link) { 1454 /* If the interface has changed, force a 1455 * link down event if the link isn't already 1456 * down, and re-resolve. 1457 */ 1458 if (link_state.interface != 1459 pl->phy_state.interface) { 1460 retrigger = true; 1461 link_state.link = false; 1462 } 1463 link_state.interface = pl->phy_state.interface; 1464 1465 /* If we are doing rate matching, then the 1466 * link speed/duplex comes from the PHY 1467 */ 1468 if (pl->phy_state.rate_matching) { 1469 link_state.rate_matching = 1470 pl->phy_state.rate_matching; 1471 link_state.speed = pl->phy_state.speed; 1472 link_state.duplex = 1473 pl->phy_state.duplex; 1474 } 1475 1476 /* If we have a PHY, we need to update with 1477 * the PHY flow control bits. 1478 */ 1479 link_state.pause = pl->phy_state.pause; 1480 mac_config = true; 1481 } 1482 phylink_apply_manual_flow(pl, &link_state); 1483 break; 1484 } 1485 } 1486 1487 if (mac_config) { 1488 if (link_state.interface != pl->link_config.interface) { 1489 /* The interface has changed, force the link down and 1490 * then reconfigure. 1491 */ 1492 if (cur_link_state) { 1493 phylink_link_down(pl); 1494 cur_link_state = false; 1495 } 1496 phylink_major_config(pl, false, &link_state); 1497 pl->link_config.interface = link_state.interface; 1498 } 1499 } 1500 1501 if (link_state.link != cur_link_state) { 1502 pl->old_link_state = link_state.link; 1503 if (!link_state.link) 1504 phylink_link_down(pl); 1505 else 1506 phylink_link_up(pl, link_state); 1507 } 1508 if (!link_state.link && retrigger) { 1509 pl->mac_link_dropped = false; 1510 queue_work(system_power_efficient_wq, &pl->resolve); 1511 } 1512 mutex_unlock(&pl->state_mutex); 1513 } 1514 1515 static void phylink_run_resolve(struct phylink *pl) 1516 { 1517 if (!pl->phylink_disable_state) 1518 queue_work(system_power_efficient_wq, &pl->resolve); 1519 } 1520 1521 static void phylink_run_resolve_and_disable(struct phylink *pl, int bit) 1522 { 1523 unsigned long state = pl->phylink_disable_state; 1524 1525 set_bit(bit, &pl->phylink_disable_state); 1526 if (state == 0) { 1527 queue_work(system_power_efficient_wq, &pl->resolve); 1528 flush_work(&pl->resolve); 1529 } 1530 } 1531 1532 static void phylink_enable_and_run_resolve(struct phylink *pl, int bit) 1533 { 1534 clear_bit(bit, &pl->phylink_disable_state); 1535 phylink_run_resolve(pl); 1536 } 1537 1538 static void phylink_fixed_poll(struct timer_list *t) 1539 { 1540 struct phylink *pl = container_of(t, struct phylink, link_poll); 1541 1542 mod_timer(t, jiffies + HZ); 1543 1544 phylink_run_resolve(pl); 1545 } 1546 1547 static const struct sfp_upstream_ops sfp_phylink_ops; 1548 1549 static int phylink_register_sfp(struct phylink *pl, 1550 const struct fwnode_handle *fwnode) 1551 { 1552 struct sfp_bus *bus; 1553 int ret; 1554 1555 if (!fwnode) 1556 return 0; 1557 1558 bus = sfp_bus_find_fwnode(fwnode); 1559 if (IS_ERR(bus)) { 1560 phylink_err(pl, "unable to attach SFP bus: %pe\n", bus); 1561 return PTR_ERR(bus); 1562 } 1563 1564 pl->sfp_bus = bus; 1565 1566 ret = sfp_bus_add_upstream(bus, pl, &sfp_phylink_ops); 1567 sfp_bus_put(bus); 1568 1569 return ret; 1570 } 1571 1572 /** 1573 * phylink_create() - create a phylink instance 1574 * @config: a pointer to the target &struct phylink_config 1575 * @fwnode: a pointer to a &struct fwnode_handle describing the network 1576 * interface 1577 * @iface: the desired link mode defined by &typedef phy_interface_t 1578 * @mac_ops: a pointer to a &struct phylink_mac_ops for the MAC. 1579 * 1580 * Create a new phylink instance, and parse the link parameters found in @np. 1581 * This will parse in-band modes, fixed-link or SFP configuration. 1582 * 1583 * Note: the rtnl lock must not be held when calling this function. 1584 * 1585 * Returns a pointer to a &struct phylink, or an error-pointer value. Users 1586 * must use IS_ERR() to check for errors from this function. 1587 */ 1588 struct phylink *phylink_create(struct phylink_config *config, 1589 const struct fwnode_handle *fwnode, 1590 phy_interface_t iface, 1591 const struct phylink_mac_ops *mac_ops) 1592 { 1593 bool using_mac_select_pcs = false; 1594 struct phylink *pl; 1595 int ret; 1596 1597 /* Validate the supplied configuration */ 1598 if (phy_interface_empty(config->supported_interfaces)) { 1599 dev_err(config->dev, 1600 "phylink: error: empty supported_interfaces\n"); 1601 return ERR_PTR(-EINVAL); 1602 } 1603 1604 if (mac_ops->mac_select_pcs && 1605 mac_ops->mac_select_pcs(config, PHY_INTERFACE_MODE_NA) != 1606 ERR_PTR(-EOPNOTSUPP)) 1607 using_mac_select_pcs = true; 1608 1609 pl = kzalloc(sizeof(*pl), GFP_KERNEL); 1610 if (!pl) 1611 return ERR_PTR(-ENOMEM); 1612 1613 mutex_init(&pl->state_mutex); 1614 INIT_WORK(&pl->resolve, phylink_resolve); 1615 1616 pl->config = config; 1617 if (config->type == PHYLINK_NETDEV) { 1618 pl->netdev = to_net_dev(config->dev); 1619 netif_carrier_off(pl->netdev); 1620 } else if (config->type == PHYLINK_DEV) { 1621 pl->dev = config->dev; 1622 } else { 1623 kfree(pl); 1624 return ERR_PTR(-EINVAL); 1625 } 1626 1627 pl->using_mac_select_pcs = using_mac_select_pcs; 1628 pl->phy_state.interface = iface; 1629 pl->link_interface = iface; 1630 if (iface == PHY_INTERFACE_MODE_MOCA) 1631 pl->link_port = PORT_BNC; 1632 else 1633 pl->link_port = PORT_MII; 1634 pl->link_config.interface = iface; 1635 pl->link_config.pause = MLO_PAUSE_AN; 1636 pl->link_config.speed = SPEED_UNKNOWN; 1637 pl->link_config.duplex = DUPLEX_UNKNOWN; 1638 pl->pcs_state = PCS_STATE_DOWN; 1639 pl->mac_ops = mac_ops; 1640 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 1641 timer_setup(&pl->link_poll, phylink_fixed_poll, 0); 1642 1643 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 1644 linkmode_copy(pl->link_config.advertising, pl->supported); 1645 phylink_validate(pl, pl->supported, &pl->link_config); 1646 1647 ret = phylink_parse_mode(pl, fwnode); 1648 if (ret < 0) { 1649 kfree(pl); 1650 return ERR_PTR(ret); 1651 } 1652 1653 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 1654 ret = phylink_parse_fixedlink(pl, fwnode); 1655 if (ret < 0) { 1656 kfree(pl); 1657 return ERR_PTR(ret); 1658 } 1659 } 1660 1661 pl->cur_link_an_mode = pl->cfg_link_an_mode; 1662 1663 ret = phylink_register_sfp(pl, fwnode); 1664 if (ret < 0) { 1665 kfree(pl); 1666 return ERR_PTR(ret); 1667 } 1668 1669 return pl; 1670 } 1671 EXPORT_SYMBOL_GPL(phylink_create); 1672 1673 /** 1674 * phylink_destroy() - cleanup and destroy the phylink instance 1675 * @pl: a pointer to a &struct phylink returned from phylink_create() 1676 * 1677 * Destroy a phylink instance. Any PHY that has been attached must have been 1678 * cleaned up via phylink_disconnect_phy() prior to calling this function. 1679 * 1680 * Note: the rtnl lock must not be held when calling this function. 1681 */ 1682 void phylink_destroy(struct phylink *pl) 1683 { 1684 sfp_bus_del_upstream(pl->sfp_bus); 1685 if (pl->link_gpio) 1686 gpiod_put(pl->link_gpio); 1687 1688 cancel_work_sync(&pl->resolve); 1689 kfree(pl); 1690 } 1691 EXPORT_SYMBOL_GPL(phylink_destroy); 1692 1693 /** 1694 * phylink_expects_phy() - Determine if phylink expects a phy to be attached 1695 * @pl: a pointer to a &struct phylink returned from phylink_create() 1696 * 1697 * When using fixed-link mode, or in-band mode with 1000base-X or 2500base-X, 1698 * no PHY is needed. 1699 * 1700 * Returns true if phylink will be expecting a PHY. 1701 */ 1702 bool phylink_expects_phy(struct phylink *pl) 1703 { 1704 if (pl->cfg_link_an_mode == MLO_AN_FIXED || 1705 (pl->cfg_link_an_mode == MLO_AN_INBAND && 1706 phy_interface_mode_is_8023z(pl->link_config.interface))) 1707 return false; 1708 return true; 1709 } 1710 EXPORT_SYMBOL_GPL(phylink_expects_phy); 1711 1712 static void phylink_phy_change(struct phy_device *phydev, bool up) 1713 { 1714 struct phylink *pl = phydev->phylink; 1715 bool tx_pause, rx_pause; 1716 1717 phy_get_pause(phydev, &tx_pause, &rx_pause); 1718 1719 mutex_lock(&pl->state_mutex); 1720 pl->phy_state.speed = phydev->speed; 1721 pl->phy_state.duplex = phydev->duplex; 1722 pl->phy_state.rate_matching = phydev->rate_matching; 1723 pl->phy_state.pause = MLO_PAUSE_NONE; 1724 if (tx_pause) 1725 pl->phy_state.pause |= MLO_PAUSE_TX; 1726 if (rx_pause) 1727 pl->phy_state.pause |= MLO_PAUSE_RX; 1728 pl->phy_state.interface = phydev->interface; 1729 pl->phy_state.link = up; 1730 mutex_unlock(&pl->state_mutex); 1731 1732 phylink_run_resolve(pl); 1733 1734 phylink_dbg(pl, "phy link %s %s/%s/%s/%s/%s\n", up ? "up" : "down", 1735 phy_modes(phydev->interface), 1736 phy_speed_to_str(phydev->speed), 1737 phy_duplex_to_str(phydev->duplex), 1738 phy_rate_matching_to_str(phydev->rate_matching), 1739 phylink_pause_to_str(pl->phy_state.pause)); 1740 } 1741 1742 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy, 1743 phy_interface_t interface) 1744 { 1745 struct phylink_link_state config; 1746 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 1747 char *irq_str; 1748 int ret; 1749 1750 /* 1751 * This is the new way of dealing with flow control for PHYs, 1752 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 1753 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 1754 * using our validate call to the MAC, we rely upon the MAC 1755 * clearing the bits from both supported and advertising fields. 1756 */ 1757 phy_support_asym_pause(phy); 1758 1759 memset(&config, 0, sizeof(config)); 1760 linkmode_copy(supported, phy->supported); 1761 linkmode_copy(config.advertising, phy->advertising); 1762 1763 /* Check whether we would use rate matching for the proposed interface 1764 * mode. 1765 */ 1766 config.rate_matching = phy_get_rate_matching(phy, interface); 1767 1768 /* Clause 45 PHYs may switch their Serdes lane between, e.g. 10GBASE-R, 1769 * 5GBASE-R, 2500BASE-X and SGMII if they are not using rate matching. 1770 * For some interface modes (e.g. RXAUI, XAUI and USXGMII) switching 1771 * their Serdes is either unnecessary or not reasonable. 1772 * 1773 * For these which switch interface modes, we really need to know which 1774 * interface modes the PHY supports to properly work out which ethtool 1775 * linkmodes can be supported. For now, as a work-around, we validate 1776 * against all interface modes, which may lead to more ethtool link 1777 * modes being advertised than are actually supported. 1778 */ 1779 if (phy->is_c45 && config.rate_matching == RATE_MATCH_NONE && 1780 interface != PHY_INTERFACE_MODE_RXAUI && 1781 interface != PHY_INTERFACE_MODE_XAUI && 1782 interface != PHY_INTERFACE_MODE_USXGMII) 1783 config.interface = PHY_INTERFACE_MODE_NA; 1784 else 1785 config.interface = interface; 1786 1787 ret = phylink_validate(pl, supported, &config); 1788 if (ret) { 1789 phylink_warn(pl, "validation of %s with support %*pb and advertisement %*pb failed: %pe\n", 1790 phy_modes(config.interface), 1791 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->supported, 1792 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising, 1793 ERR_PTR(ret)); 1794 return ret; 1795 } 1796 1797 phy->phylink = pl; 1798 phy->phy_link_change = phylink_phy_change; 1799 1800 irq_str = phy_attached_info_irq(phy); 1801 phylink_info(pl, 1802 "PHY [%s] driver [%s] (irq=%s)\n", 1803 dev_name(&phy->mdio.dev), phy->drv->name, irq_str); 1804 kfree(irq_str); 1805 1806 mutex_lock(&phy->lock); 1807 mutex_lock(&pl->state_mutex); 1808 pl->phydev = phy; 1809 pl->phy_state.interface = interface; 1810 pl->phy_state.pause = MLO_PAUSE_NONE; 1811 pl->phy_state.speed = SPEED_UNKNOWN; 1812 pl->phy_state.duplex = DUPLEX_UNKNOWN; 1813 pl->phy_state.rate_matching = RATE_MATCH_NONE; 1814 linkmode_copy(pl->supported, supported); 1815 linkmode_copy(pl->link_config.advertising, config.advertising); 1816 1817 /* Restrict the phy advertisement according to the MAC support. */ 1818 linkmode_copy(phy->advertising, config.advertising); 1819 mutex_unlock(&pl->state_mutex); 1820 mutex_unlock(&phy->lock); 1821 1822 phylink_dbg(pl, 1823 "phy: %s setting supported %*pb advertising %*pb\n", 1824 phy_modes(interface), 1825 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported, 1826 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising); 1827 1828 if (phy_interrupt_is_valid(phy)) 1829 phy_request_interrupt(phy); 1830 1831 if (pl->config->mac_managed_pm) 1832 phy->mac_managed_pm = true; 1833 1834 return 0; 1835 } 1836 1837 static int phylink_attach_phy(struct phylink *pl, struct phy_device *phy, 1838 phy_interface_t interface) 1839 { 1840 if (WARN_ON(pl->cfg_link_an_mode == MLO_AN_FIXED || 1841 (pl->cfg_link_an_mode == MLO_AN_INBAND && 1842 phy_interface_mode_is_8023z(interface) && !pl->sfp_bus))) 1843 return -EINVAL; 1844 1845 if (pl->phydev) 1846 return -EBUSY; 1847 1848 return phy_attach_direct(pl->netdev, phy, 0, interface); 1849 } 1850 1851 /** 1852 * phylink_connect_phy() - connect a PHY to the phylink instance 1853 * @pl: a pointer to a &struct phylink returned from phylink_create() 1854 * @phy: a pointer to a &struct phy_device. 1855 * 1856 * Connect @phy to the phylink instance specified by @pl by calling 1857 * phy_attach_direct(). Configure the @phy according to the MAC driver's 1858 * capabilities, start the PHYLIB state machine and enable any interrupts 1859 * that the PHY supports. 1860 * 1861 * This updates the phylink's ethtool supported and advertising link mode 1862 * masks. 1863 * 1864 * Returns 0 on success or a negative errno. 1865 */ 1866 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy) 1867 { 1868 int ret; 1869 1870 /* Use PHY device/driver interface */ 1871 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 1872 pl->link_interface = phy->interface; 1873 pl->link_config.interface = pl->link_interface; 1874 } 1875 1876 ret = phylink_attach_phy(pl, phy, pl->link_interface); 1877 if (ret < 0) 1878 return ret; 1879 1880 ret = phylink_bringup_phy(pl, phy, pl->link_config.interface); 1881 if (ret) 1882 phy_detach(phy); 1883 1884 return ret; 1885 } 1886 EXPORT_SYMBOL_GPL(phylink_connect_phy); 1887 1888 /** 1889 * phylink_of_phy_connect() - connect the PHY specified in the DT mode. 1890 * @pl: a pointer to a &struct phylink returned from phylink_create() 1891 * @dn: a pointer to a &struct device_node. 1892 * @flags: PHY-specific flags to communicate to the PHY device driver 1893 * 1894 * Connect the phy specified in the device node @dn to the phylink instance 1895 * specified by @pl. Actions specified in phylink_connect_phy() will be 1896 * performed. 1897 * 1898 * Returns 0 on success or a negative errno. 1899 */ 1900 int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn, 1901 u32 flags) 1902 { 1903 return phylink_fwnode_phy_connect(pl, of_fwnode_handle(dn), flags); 1904 } 1905 EXPORT_SYMBOL_GPL(phylink_of_phy_connect); 1906 1907 /** 1908 * phylink_fwnode_phy_connect() - connect the PHY specified in the fwnode. 1909 * @pl: a pointer to a &struct phylink returned from phylink_create() 1910 * @fwnode: a pointer to a &struct fwnode_handle. 1911 * @flags: PHY-specific flags to communicate to the PHY device driver 1912 * 1913 * Connect the phy specified @fwnode to the phylink instance specified 1914 * by @pl. 1915 * 1916 * Returns 0 on success or a negative errno. 1917 */ 1918 int phylink_fwnode_phy_connect(struct phylink *pl, 1919 const struct fwnode_handle *fwnode, 1920 u32 flags) 1921 { 1922 struct fwnode_handle *phy_fwnode; 1923 struct phy_device *phy_dev; 1924 int ret; 1925 1926 /* Fixed links and 802.3z are handled without needing a PHY */ 1927 if (pl->cfg_link_an_mode == MLO_AN_FIXED || 1928 (pl->cfg_link_an_mode == MLO_AN_INBAND && 1929 phy_interface_mode_is_8023z(pl->link_interface))) 1930 return 0; 1931 1932 phy_fwnode = fwnode_get_phy_node(fwnode); 1933 if (IS_ERR(phy_fwnode)) { 1934 if (pl->cfg_link_an_mode == MLO_AN_PHY) 1935 return -ENODEV; 1936 return 0; 1937 } 1938 1939 phy_dev = fwnode_phy_find_device(phy_fwnode); 1940 /* We're done with the phy_node handle */ 1941 fwnode_handle_put(phy_fwnode); 1942 if (!phy_dev) 1943 return -ENODEV; 1944 1945 /* Use PHY device/driver interface */ 1946 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 1947 pl->link_interface = phy_dev->interface; 1948 pl->link_config.interface = pl->link_interface; 1949 } 1950 1951 ret = phy_attach_direct(pl->netdev, phy_dev, flags, 1952 pl->link_interface); 1953 phy_device_free(phy_dev); 1954 if (ret) 1955 return ret; 1956 1957 ret = phylink_bringup_phy(pl, phy_dev, pl->link_config.interface); 1958 if (ret) 1959 phy_detach(phy_dev); 1960 1961 return ret; 1962 } 1963 EXPORT_SYMBOL_GPL(phylink_fwnode_phy_connect); 1964 1965 /** 1966 * phylink_disconnect_phy() - disconnect any PHY attached to the phylink 1967 * instance. 1968 * @pl: a pointer to a &struct phylink returned from phylink_create() 1969 * 1970 * Disconnect any current PHY from the phylink instance described by @pl. 1971 */ 1972 void phylink_disconnect_phy(struct phylink *pl) 1973 { 1974 struct phy_device *phy; 1975 1976 ASSERT_RTNL(); 1977 1978 phy = pl->phydev; 1979 if (phy) { 1980 mutex_lock(&phy->lock); 1981 mutex_lock(&pl->state_mutex); 1982 pl->phydev = NULL; 1983 mutex_unlock(&pl->state_mutex); 1984 mutex_unlock(&phy->lock); 1985 flush_work(&pl->resolve); 1986 1987 phy_disconnect(phy); 1988 } 1989 } 1990 EXPORT_SYMBOL_GPL(phylink_disconnect_phy); 1991 1992 static void phylink_link_changed(struct phylink *pl, bool up, const char *what) 1993 { 1994 if (!up) 1995 pl->mac_link_dropped = true; 1996 phylink_run_resolve(pl); 1997 phylink_dbg(pl, "%s link %s\n", what, up ? "up" : "down"); 1998 } 1999 2000 /** 2001 * phylink_mac_change() - notify phylink of a change in MAC state 2002 * @pl: a pointer to a &struct phylink returned from phylink_create() 2003 * @up: indicates whether the link is currently up. 2004 * 2005 * The MAC driver should call this driver when the state of its link 2006 * changes (eg, link failure, new negotiation results, etc.) 2007 */ 2008 void phylink_mac_change(struct phylink *pl, bool up) 2009 { 2010 phylink_link_changed(pl, up, "mac"); 2011 } 2012 EXPORT_SYMBOL_GPL(phylink_mac_change); 2013 2014 /** 2015 * phylink_pcs_change() - notify phylink of a change to PCS link state 2016 * @pcs: pointer to &struct phylink_pcs 2017 * @up: indicates whether the link is currently up. 2018 * 2019 * The PCS driver should call this when the state of its link changes 2020 * (e.g. link failure, new negotiation results, etc.) Note: it should 2021 * not determine "up" by reading the BMSR. If in doubt about the link 2022 * state at interrupt time, then pass true if pcs_get_state() returns 2023 * the latched link-down state, otherwise pass false. 2024 */ 2025 void phylink_pcs_change(struct phylink_pcs *pcs, bool up) 2026 { 2027 struct phylink *pl = pcs->phylink; 2028 2029 if (pl) 2030 phylink_link_changed(pl, up, "pcs"); 2031 } 2032 EXPORT_SYMBOL_GPL(phylink_pcs_change); 2033 2034 static irqreturn_t phylink_link_handler(int irq, void *data) 2035 { 2036 struct phylink *pl = data; 2037 2038 phylink_run_resolve(pl); 2039 2040 return IRQ_HANDLED; 2041 } 2042 2043 /** 2044 * phylink_start() - start a phylink instance 2045 * @pl: a pointer to a &struct phylink returned from phylink_create() 2046 * 2047 * Start the phylink instance specified by @pl, configuring the MAC for the 2048 * desired link mode(s) and negotiation style. This should be called from the 2049 * network device driver's &struct net_device_ops ndo_open() method. 2050 */ 2051 void phylink_start(struct phylink *pl) 2052 { 2053 bool poll = false; 2054 2055 ASSERT_RTNL(); 2056 2057 phylink_info(pl, "configuring for %s/%s link mode\n", 2058 phylink_an_mode_str(pl->cur_link_an_mode), 2059 phy_modes(pl->link_config.interface)); 2060 2061 /* Always set the carrier off */ 2062 if (pl->netdev) 2063 netif_carrier_off(pl->netdev); 2064 2065 pl->pcs_state = PCS_STATE_STARTING; 2066 2067 /* Apply the link configuration to the MAC when starting. This allows 2068 * a fixed-link to start with the correct parameters, and also 2069 * ensures that we set the appropriate advertisement for Serdes links. 2070 * 2071 * Restart autonegotiation if using 802.3z to ensure that the link 2072 * parameters are properly negotiated. This is necessary for DSA 2073 * switches using 802.3z negotiation to ensure they see our modes. 2074 */ 2075 phylink_mac_initial_config(pl, true); 2076 2077 pl->pcs_state = PCS_STATE_STARTED; 2078 2079 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_STOPPED); 2080 2081 if (pl->cfg_link_an_mode == MLO_AN_FIXED && pl->link_gpio) { 2082 int irq = gpiod_to_irq(pl->link_gpio); 2083 2084 if (irq > 0) { 2085 if (!request_irq(irq, phylink_link_handler, 2086 IRQF_TRIGGER_RISING | 2087 IRQF_TRIGGER_FALLING, 2088 "netdev link", pl)) 2089 pl->link_irq = irq; 2090 else 2091 irq = 0; 2092 } 2093 if (irq <= 0) 2094 poll = true; 2095 } 2096 2097 if (pl->cfg_link_an_mode == MLO_AN_FIXED) 2098 poll |= pl->config->poll_fixed_state; 2099 2100 if (poll) 2101 mod_timer(&pl->link_poll, jiffies + HZ); 2102 if (pl->phydev) 2103 phy_start(pl->phydev); 2104 if (pl->sfp_bus) 2105 sfp_upstream_start(pl->sfp_bus); 2106 } 2107 EXPORT_SYMBOL_GPL(phylink_start); 2108 2109 /** 2110 * phylink_stop() - stop a phylink instance 2111 * @pl: a pointer to a &struct phylink returned from phylink_create() 2112 * 2113 * Stop the phylink instance specified by @pl. This should be called from the 2114 * network device driver's &struct net_device_ops ndo_stop() method. The 2115 * network device's carrier state should not be changed prior to calling this 2116 * function. 2117 * 2118 * This will synchronously bring down the link if the link is not already 2119 * down (in other words, it will trigger a mac_link_down() method call.) 2120 */ 2121 void phylink_stop(struct phylink *pl) 2122 { 2123 ASSERT_RTNL(); 2124 2125 if (pl->sfp_bus) 2126 sfp_upstream_stop(pl->sfp_bus); 2127 if (pl->phydev) 2128 phy_stop(pl->phydev); 2129 del_timer_sync(&pl->link_poll); 2130 if (pl->link_irq) { 2131 free_irq(pl->link_irq, pl); 2132 pl->link_irq = 0; 2133 } 2134 2135 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED); 2136 2137 pl->pcs_state = PCS_STATE_DOWN; 2138 2139 phylink_pcs_disable(pl->pcs); 2140 } 2141 EXPORT_SYMBOL_GPL(phylink_stop); 2142 2143 /** 2144 * phylink_suspend() - handle a network device suspend event 2145 * @pl: a pointer to a &struct phylink returned from phylink_create() 2146 * @mac_wol: true if the MAC needs to receive packets for Wake-on-Lan 2147 * 2148 * Handle a network device suspend event. There are several cases: 2149 * 2150 * - If Wake-on-Lan is not active, we can bring down the link between 2151 * the MAC and PHY by calling phylink_stop(). 2152 * - If Wake-on-Lan is active, and being handled only by the PHY, we 2153 * can also bring down the link between the MAC and PHY. 2154 * - If Wake-on-Lan is active, but being handled by the MAC, the MAC 2155 * still needs to receive packets, so we can not bring the link down. 2156 */ 2157 void phylink_suspend(struct phylink *pl, bool mac_wol) 2158 { 2159 ASSERT_RTNL(); 2160 2161 if (mac_wol && (!pl->netdev || pl->netdev->wol_enabled)) { 2162 /* Wake-on-Lan enabled, MAC handling */ 2163 mutex_lock(&pl->state_mutex); 2164 2165 /* Stop the resolver bringing the link up */ 2166 __set_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state); 2167 2168 /* Disable the carrier, to prevent transmit timeouts, 2169 * but one would hope all packets have been sent. This 2170 * also means phylink_resolve() will do nothing. 2171 */ 2172 if (pl->netdev) 2173 netif_carrier_off(pl->netdev); 2174 else 2175 pl->old_link_state = false; 2176 2177 /* We do not call mac_link_down() here as we want the 2178 * link to remain up to receive the WoL packets. 2179 */ 2180 mutex_unlock(&pl->state_mutex); 2181 } else { 2182 phylink_stop(pl); 2183 } 2184 } 2185 EXPORT_SYMBOL_GPL(phylink_suspend); 2186 2187 /** 2188 * phylink_resume() - handle a network device resume event 2189 * @pl: a pointer to a &struct phylink returned from phylink_create() 2190 * 2191 * Undo the effects of phylink_suspend(), returning the link to an 2192 * operational state. 2193 */ 2194 void phylink_resume(struct phylink *pl) 2195 { 2196 ASSERT_RTNL(); 2197 2198 if (test_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state)) { 2199 /* Wake-on-Lan enabled, MAC handling */ 2200 2201 /* Call mac_link_down() so we keep the overall state balanced. 2202 * Do this under the state_mutex lock for consistency. This 2203 * will cause a "Link Down" message to be printed during 2204 * resume, which is harmless - the true link state will be 2205 * printed when we run a resolve. 2206 */ 2207 mutex_lock(&pl->state_mutex); 2208 phylink_link_down(pl); 2209 mutex_unlock(&pl->state_mutex); 2210 2211 /* Re-apply the link parameters so that all the settings get 2212 * restored to the MAC. 2213 */ 2214 phylink_mac_initial_config(pl, true); 2215 2216 /* Re-enable and re-resolve the link parameters */ 2217 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_MAC_WOL); 2218 } else { 2219 phylink_start(pl); 2220 } 2221 } 2222 EXPORT_SYMBOL_GPL(phylink_resume); 2223 2224 /** 2225 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY 2226 * @pl: a pointer to a &struct phylink returned from phylink_create() 2227 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters 2228 * 2229 * Read the wake on lan parameters from the PHY attached to the phylink 2230 * instance specified by @pl. If no PHY is currently attached, report no 2231 * support for wake on lan. 2232 */ 2233 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 2234 { 2235 ASSERT_RTNL(); 2236 2237 wol->supported = 0; 2238 wol->wolopts = 0; 2239 2240 if (pl->phydev) 2241 phy_ethtool_get_wol(pl->phydev, wol); 2242 } 2243 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol); 2244 2245 /** 2246 * phylink_ethtool_set_wol() - set wake on lan parameters 2247 * @pl: a pointer to a &struct phylink returned from phylink_create() 2248 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters 2249 * 2250 * Set the wake on lan parameters for the PHY attached to the phylink 2251 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP 2252 * error. 2253 * 2254 * Returns zero on success or negative errno code. 2255 */ 2256 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 2257 { 2258 int ret = -EOPNOTSUPP; 2259 2260 ASSERT_RTNL(); 2261 2262 if (pl->phydev) 2263 ret = phy_ethtool_set_wol(pl->phydev, wol); 2264 2265 return ret; 2266 } 2267 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol); 2268 2269 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b) 2270 { 2271 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask); 2272 2273 linkmode_zero(mask); 2274 phylink_set_port_modes(mask); 2275 2276 linkmode_and(dst, dst, mask); 2277 linkmode_or(dst, dst, b); 2278 } 2279 2280 static void phylink_get_ksettings(const struct phylink_link_state *state, 2281 struct ethtool_link_ksettings *kset) 2282 { 2283 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising); 2284 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising); 2285 if (kset->base.rate_matching == RATE_MATCH_NONE) { 2286 kset->base.speed = state->speed; 2287 kset->base.duplex = state->duplex; 2288 } 2289 kset->base.autoneg = linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2290 state->advertising) ? 2291 AUTONEG_ENABLE : AUTONEG_DISABLE; 2292 } 2293 2294 /** 2295 * phylink_ethtool_ksettings_get() - get the current link settings 2296 * @pl: a pointer to a &struct phylink returned from phylink_create() 2297 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings 2298 * 2299 * Read the current link settings for the phylink instance specified by @pl. 2300 * This will be the link settings read from the MAC, PHY or fixed link 2301 * settings depending on the current negotiation mode. 2302 */ 2303 int phylink_ethtool_ksettings_get(struct phylink *pl, 2304 struct ethtool_link_ksettings *kset) 2305 { 2306 struct phylink_link_state link_state; 2307 2308 ASSERT_RTNL(); 2309 2310 if (pl->phydev) 2311 phy_ethtool_ksettings_get(pl->phydev, kset); 2312 else 2313 kset->base.port = pl->link_port; 2314 2315 linkmode_copy(kset->link_modes.supported, pl->supported); 2316 2317 switch (pl->cur_link_an_mode) { 2318 case MLO_AN_FIXED: 2319 /* We are using fixed settings. Report these as the 2320 * current link settings - and note that these also 2321 * represent the supported speeds/duplex/pause modes. 2322 */ 2323 phylink_get_fixed_state(pl, &link_state); 2324 phylink_get_ksettings(&link_state, kset); 2325 break; 2326 2327 case MLO_AN_INBAND: 2328 /* If there is a phy attached, then use the reported 2329 * settings from the phy with no modification. 2330 */ 2331 if (pl->phydev) 2332 break; 2333 2334 phylink_mac_pcs_get_state(pl, &link_state); 2335 2336 /* The MAC is reporting the link results from its own PCS 2337 * layer via in-band status. Report these as the current 2338 * link settings. 2339 */ 2340 phylink_get_ksettings(&link_state, kset); 2341 break; 2342 } 2343 2344 return 0; 2345 } 2346 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get); 2347 2348 /** 2349 * phylink_ethtool_ksettings_set() - set the link settings 2350 * @pl: a pointer to a &struct phylink returned from phylink_create() 2351 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes 2352 */ 2353 int phylink_ethtool_ksettings_set(struct phylink *pl, 2354 const struct ethtool_link_ksettings *kset) 2355 { 2356 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 2357 struct phylink_link_state config; 2358 const struct phy_setting *s; 2359 2360 ASSERT_RTNL(); 2361 2362 if (pl->phydev) { 2363 struct ethtool_link_ksettings phy_kset = *kset; 2364 2365 linkmode_and(phy_kset.link_modes.advertising, 2366 phy_kset.link_modes.advertising, 2367 pl->supported); 2368 2369 /* We can rely on phylib for this update; we also do not need 2370 * to update the pl->link_config settings: 2371 * - the configuration returned via ksettings_get() will come 2372 * from phylib whenever a PHY is present. 2373 * - link_config.interface will be updated by the PHY calling 2374 * back via phylink_phy_change() and a subsequent resolve. 2375 * - initial link configuration for PHY mode comes from the 2376 * last phy state updated via phylink_phy_change(). 2377 * - other configuration changes (e.g. pause modes) are 2378 * performed directly via phylib. 2379 * - if in in-band mode with a PHY, the link configuration 2380 * is passed on the link from the PHY, and all of 2381 * link_config.{speed,duplex,an_enabled,pause} are not used. 2382 * - the only possible use would be link_config.advertising 2383 * pause modes when in 1000base-X mode with a PHY, but in 2384 * the presence of a PHY, this should not be changed as that 2385 * should be determined from the media side advertisement. 2386 */ 2387 return phy_ethtool_ksettings_set(pl->phydev, &phy_kset); 2388 } 2389 2390 config = pl->link_config; 2391 /* Mask out unsupported advertisements */ 2392 linkmode_and(config.advertising, kset->link_modes.advertising, 2393 pl->supported); 2394 2395 /* FIXME: should we reject autoneg if phy/mac does not support it? */ 2396 switch (kset->base.autoneg) { 2397 case AUTONEG_DISABLE: 2398 /* Autonegotiation disabled, select a suitable speed and 2399 * duplex. 2400 */ 2401 s = phy_lookup_setting(kset->base.speed, kset->base.duplex, 2402 pl->supported, false); 2403 if (!s) 2404 return -EINVAL; 2405 2406 /* If we have a fixed link, refuse to change link parameters. 2407 * If the link parameters match, accept them but do nothing. 2408 */ 2409 if (pl->cur_link_an_mode == MLO_AN_FIXED) { 2410 if (s->speed != pl->link_config.speed || 2411 s->duplex != pl->link_config.duplex) 2412 return -EINVAL; 2413 return 0; 2414 } 2415 2416 config.speed = s->speed; 2417 config.duplex = s->duplex; 2418 break; 2419 2420 case AUTONEG_ENABLE: 2421 /* If we have a fixed link, allow autonegotiation (since that 2422 * is our default case) but do not allow the advertisement to 2423 * be changed. If the advertisement matches, simply return. 2424 */ 2425 if (pl->cur_link_an_mode == MLO_AN_FIXED) { 2426 if (!linkmode_equal(config.advertising, 2427 pl->link_config.advertising)) 2428 return -EINVAL; 2429 return 0; 2430 } 2431 2432 config.speed = SPEED_UNKNOWN; 2433 config.duplex = DUPLEX_UNKNOWN; 2434 break; 2435 2436 default: 2437 return -EINVAL; 2438 } 2439 2440 /* We have ruled out the case with a PHY attached, and the 2441 * fixed-link cases. All that is left are in-band links. 2442 */ 2443 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising, 2444 kset->base.autoneg == AUTONEG_ENABLE); 2445 2446 /* If this link is with an SFP, ensure that changes to advertised modes 2447 * also cause the associated interface to be selected such that the 2448 * link can be configured correctly. 2449 */ 2450 if (pl->sfp_bus) { 2451 config.interface = sfp_select_interface(pl->sfp_bus, 2452 config.advertising); 2453 if (config.interface == PHY_INTERFACE_MODE_NA) { 2454 phylink_err(pl, 2455 "selection of interface failed, advertisement %*pb\n", 2456 __ETHTOOL_LINK_MODE_MASK_NBITS, 2457 config.advertising); 2458 return -EINVAL; 2459 } 2460 2461 /* Revalidate with the selected interface */ 2462 linkmode_copy(support, pl->supported); 2463 if (phylink_validate(pl, support, &config)) { 2464 phylink_err(pl, "validation of %s/%s with support %*pb failed\n", 2465 phylink_an_mode_str(pl->cur_link_an_mode), 2466 phy_modes(config.interface), 2467 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 2468 return -EINVAL; 2469 } 2470 } else { 2471 /* Validate without changing the current supported mask. */ 2472 linkmode_copy(support, pl->supported); 2473 if (phylink_validate(pl, support, &config)) 2474 return -EINVAL; 2475 } 2476 2477 /* If autonegotiation is enabled, we must have an advertisement */ 2478 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2479 config.advertising) && 2480 phylink_is_empty_linkmode(config.advertising)) 2481 return -EINVAL; 2482 2483 mutex_lock(&pl->state_mutex); 2484 pl->link_config.speed = config.speed; 2485 pl->link_config.duplex = config.duplex; 2486 2487 if (pl->link_config.interface != config.interface) { 2488 /* The interface changed, e.g. 1000base-X <-> 2500base-X */ 2489 /* We need to force the link down, then change the interface */ 2490 if (pl->old_link_state) { 2491 phylink_link_down(pl); 2492 pl->old_link_state = false; 2493 } 2494 if (!test_bit(PHYLINK_DISABLE_STOPPED, 2495 &pl->phylink_disable_state)) 2496 phylink_major_config(pl, false, &config); 2497 pl->link_config.interface = config.interface; 2498 linkmode_copy(pl->link_config.advertising, config.advertising); 2499 } else if (!linkmode_equal(pl->link_config.advertising, 2500 config.advertising)) { 2501 linkmode_copy(pl->link_config.advertising, config.advertising); 2502 phylink_change_inband_advert(pl); 2503 } 2504 mutex_unlock(&pl->state_mutex); 2505 2506 return 0; 2507 } 2508 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set); 2509 2510 /** 2511 * phylink_ethtool_nway_reset() - restart negotiation 2512 * @pl: a pointer to a &struct phylink returned from phylink_create() 2513 * 2514 * Restart negotiation for the phylink instance specified by @pl. This will 2515 * cause any attached phy to restart negotiation with the link partner, and 2516 * if the MAC is in a BaseX mode, the MAC will also be requested to restart 2517 * negotiation. 2518 * 2519 * Returns zero on success, or negative error code. 2520 */ 2521 int phylink_ethtool_nway_reset(struct phylink *pl) 2522 { 2523 int ret = 0; 2524 2525 ASSERT_RTNL(); 2526 2527 if (pl->phydev) 2528 ret = phy_restart_aneg(pl->phydev); 2529 phylink_pcs_an_restart(pl); 2530 2531 return ret; 2532 } 2533 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset); 2534 2535 /** 2536 * phylink_ethtool_get_pauseparam() - get the current pause parameters 2537 * @pl: a pointer to a &struct phylink returned from phylink_create() 2538 * @pause: a pointer to a &struct ethtool_pauseparam 2539 */ 2540 void phylink_ethtool_get_pauseparam(struct phylink *pl, 2541 struct ethtool_pauseparam *pause) 2542 { 2543 ASSERT_RTNL(); 2544 2545 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN); 2546 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX); 2547 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX); 2548 } 2549 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam); 2550 2551 /** 2552 * phylink_ethtool_set_pauseparam() - set the current pause parameters 2553 * @pl: a pointer to a &struct phylink returned from phylink_create() 2554 * @pause: a pointer to a &struct ethtool_pauseparam 2555 */ 2556 int phylink_ethtool_set_pauseparam(struct phylink *pl, 2557 struct ethtool_pauseparam *pause) 2558 { 2559 struct phylink_link_state *config = &pl->link_config; 2560 bool manual_changed; 2561 int pause_state; 2562 2563 ASSERT_RTNL(); 2564 2565 if (pl->cur_link_an_mode == MLO_AN_FIXED) 2566 return -EOPNOTSUPP; 2567 2568 if (!phylink_test(pl->supported, Pause) && 2569 !phylink_test(pl->supported, Asym_Pause)) 2570 return -EOPNOTSUPP; 2571 2572 if (!phylink_test(pl->supported, Asym_Pause) && 2573 pause->rx_pause != pause->tx_pause) 2574 return -EINVAL; 2575 2576 pause_state = 0; 2577 if (pause->autoneg) 2578 pause_state |= MLO_PAUSE_AN; 2579 if (pause->rx_pause) 2580 pause_state |= MLO_PAUSE_RX; 2581 if (pause->tx_pause) 2582 pause_state |= MLO_PAUSE_TX; 2583 2584 mutex_lock(&pl->state_mutex); 2585 /* 2586 * See the comments for linkmode_set_pause(), wrt the deficiencies 2587 * with the current implementation. A solution to this issue would 2588 * be: 2589 * ethtool Local device 2590 * rx tx Pause AsymDir 2591 * 0 0 0 0 2592 * 1 0 1 1 2593 * 0 1 0 1 2594 * 1 1 1 1 2595 * and then use the ethtool rx/tx enablement status to mask the 2596 * rx/tx pause resolution. 2597 */ 2598 linkmode_set_pause(config->advertising, pause->tx_pause, 2599 pause->rx_pause); 2600 2601 manual_changed = (config->pause ^ pause_state) & MLO_PAUSE_AN || 2602 (!(pause_state & MLO_PAUSE_AN) && 2603 (config->pause ^ pause_state) & MLO_PAUSE_TXRX_MASK); 2604 2605 config->pause = pause_state; 2606 2607 /* Update our in-band advertisement, triggering a renegotiation if 2608 * the advertisement changed. 2609 */ 2610 if (!pl->phydev) 2611 phylink_change_inband_advert(pl); 2612 2613 mutex_unlock(&pl->state_mutex); 2614 2615 /* If we have a PHY, a change of the pause frame advertisement will 2616 * cause phylib to renegotiate (if AN is enabled) which will in turn 2617 * call our phylink_phy_change() and trigger a resolve. Note that 2618 * we can't hold our state mutex while calling phy_set_asym_pause(). 2619 */ 2620 if (pl->phydev) 2621 phy_set_asym_pause(pl->phydev, pause->rx_pause, 2622 pause->tx_pause); 2623 2624 /* If the manual pause settings changed, make sure we trigger a 2625 * resolve to update their state; we can not guarantee that the 2626 * link will cycle. 2627 */ 2628 if (manual_changed) { 2629 pl->mac_link_dropped = true; 2630 phylink_run_resolve(pl); 2631 } 2632 2633 return 0; 2634 } 2635 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam); 2636 2637 /** 2638 * phylink_get_eee_err() - read the energy efficient ethernet error 2639 * counter 2640 * @pl: a pointer to a &struct phylink returned from phylink_create(). 2641 * 2642 * Read the Energy Efficient Ethernet error counter from the PHY associated 2643 * with the phylink instance specified by @pl. 2644 * 2645 * Returns positive error counter value, or negative error code. 2646 */ 2647 int phylink_get_eee_err(struct phylink *pl) 2648 { 2649 int ret = 0; 2650 2651 ASSERT_RTNL(); 2652 2653 if (pl->phydev) 2654 ret = phy_get_eee_err(pl->phydev); 2655 2656 return ret; 2657 } 2658 EXPORT_SYMBOL_GPL(phylink_get_eee_err); 2659 2660 /** 2661 * phylink_init_eee() - init and check the EEE features 2662 * @pl: a pointer to a &struct phylink returned from phylink_create() 2663 * @clk_stop_enable: allow PHY to stop receive clock 2664 * 2665 * Must be called either with RTNL held or within mac_link_up() 2666 */ 2667 int phylink_init_eee(struct phylink *pl, bool clk_stop_enable) 2668 { 2669 int ret = -EOPNOTSUPP; 2670 2671 if (pl->phydev) 2672 ret = phy_init_eee(pl->phydev, clk_stop_enable); 2673 2674 return ret; 2675 } 2676 EXPORT_SYMBOL_GPL(phylink_init_eee); 2677 2678 /** 2679 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters 2680 * @pl: a pointer to a &struct phylink returned from phylink_create() 2681 * @eee: a pointer to a &struct ethtool_eee for the read parameters 2682 */ 2683 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee) 2684 { 2685 int ret = -EOPNOTSUPP; 2686 2687 ASSERT_RTNL(); 2688 2689 if (pl->phydev) 2690 ret = phy_ethtool_get_eee(pl->phydev, eee); 2691 2692 return ret; 2693 } 2694 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee); 2695 2696 /** 2697 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters 2698 * @pl: a pointer to a &struct phylink returned from phylink_create() 2699 * @eee: a pointer to a &struct ethtool_eee for the desired parameters 2700 */ 2701 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee) 2702 { 2703 int ret = -EOPNOTSUPP; 2704 2705 ASSERT_RTNL(); 2706 2707 if (pl->phydev) 2708 ret = phy_ethtool_set_eee(pl->phydev, eee); 2709 2710 return ret; 2711 } 2712 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee); 2713 2714 /* This emulates MII registers for a fixed-mode phy operating as per the 2715 * passed in state. "aneg" defines if we report negotiation is possible. 2716 * 2717 * FIXME: should deal with negotiation state too. 2718 */ 2719 static int phylink_mii_emul_read(unsigned int reg, 2720 struct phylink_link_state *state) 2721 { 2722 struct fixed_phy_status fs; 2723 unsigned long *lpa = state->lp_advertising; 2724 int val; 2725 2726 fs.link = state->link; 2727 fs.speed = state->speed; 2728 fs.duplex = state->duplex; 2729 fs.pause = test_bit(ETHTOOL_LINK_MODE_Pause_BIT, lpa); 2730 fs.asym_pause = test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, lpa); 2731 2732 val = swphy_read_reg(reg, &fs); 2733 if (reg == MII_BMSR) { 2734 if (!state->an_complete) 2735 val &= ~BMSR_ANEGCOMPLETE; 2736 } 2737 return val; 2738 } 2739 2740 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id, 2741 unsigned int reg) 2742 { 2743 struct phy_device *phydev = pl->phydev; 2744 int prtad, devad; 2745 2746 if (mdio_phy_id_is_c45(phy_id)) { 2747 prtad = mdio_phy_id_prtad(phy_id); 2748 devad = mdio_phy_id_devad(phy_id); 2749 return mdiobus_c45_read(pl->phydev->mdio.bus, prtad, devad, 2750 reg); 2751 } 2752 2753 if (phydev->is_c45) { 2754 switch (reg) { 2755 case MII_BMCR: 2756 case MII_BMSR: 2757 case MII_PHYSID1: 2758 case MII_PHYSID2: 2759 devad = __ffs(phydev->c45_ids.mmds_present); 2760 break; 2761 case MII_ADVERTISE: 2762 case MII_LPA: 2763 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 2764 return -EINVAL; 2765 devad = MDIO_MMD_AN; 2766 if (reg == MII_ADVERTISE) 2767 reg = MDIO_AN_ADVERTISE; 2768 else 2769 reg = MDIO_AN_LPA; 2770 break; 2771 default: 2772 return -EINVAL; 2773 } 2774 prtad = phy_id; 2775 return mdiobus_c45_read(pl->phydev->mdio.bus, prtad, devad, 2776 reg); 2777 } 2778 2779 return mdiobus_read(pl->phydev->mdio.bus, phy_id, reg); 2780 } 2781 2782 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id, 2783 unsigned int reg, unsigned int val) 2784 { 2785 struct phy_device *phydev = pl->phydev; 2786 int prtad, devad; 2787 2788 if (mdio_phy_id_is_c45(phy_id)) { 2789 prtad = mdio_phy_id_prtad(phy_id); 2790 devad = mdio_phy_id_devad(phy_id); 2791 return mdiobus_c45_write(pl->phydev->mdio.bus, prtad, devad, 2792 reg, val); 2793 } 2794 2795 if (phydev->is_c45) { 2796 switch (reg) { 2797 case MII_BMCR: 2798 case MII_BMSR: 2799 case MII_PHYSID1: 2800 case MII_PHYSID2: 2801 devad = __ffs(phydev->c45_ids.mmds_present); 2802 break; 2803 case MII_ADVERTISE: 2804 case MII_LPA: 2805 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 2806 return -EINVAL; 2807 devad = MDIO_MMD_AN; 2808 if (reg == MII_ADVERTISE) 2809 reg = MDIO_AN_ADVERTISE; 2810 else 2811 reg = MDIO_AN_LPA; 2812 break; 2813 default: 2814 return -EINVAL; 2815 } 2816 return mdiobus_c45_write(pl->phydev->mdio.bus, phy_id, devad, 2817 reg, val); 2818 } 2819 2820 return mdiobus_write(phydev->mdio.bus, phy_id, reg, val); 2821 } 2822 2823 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id, 2824 unsigned int reg) 2825 { 2826 struct phylink_link_state state; 2827 int val = 0xffff; 2828 2829 switch (pl->cur_link_an_mode) { 2830 case MLO_AN_FIXED: 2831 if (phy_id == 0) { 2832 phylink_get_fixed_state(pl, &state); 2833 val = phylink_mii_emul_read(reg, &state); 2834 } 2835 break; 2836 2837 case MLO_AN_PHY: 2838 return -EOPNOTSUPP; 2839 2840 case MLO_AN_INBAND: 2841 if (phy_id == 0) { 2842 phylink_mac_pcs_get_state(pl, &state); 2843 val = phylink_mii_emul_read(reg, &state); 2844 } 2845 break; 2846 } 2847 2848 return val & 0xffff; 2849 } 2850 2851 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id, 2852 unsigned int reg, unsigned int val) 2853 { 2854 switch (pl->cur_link_an_mode) { 2855 case MLO_AN_FIXED: 2856 break; 2857 2858 case MLO_AN_PHY: 2859 return -EOPNOTSUPP; 2860 2861 case MLO_AN_INBAND: 2862 break; 2863 } 2864 2865 return 0; 2866 } 2867 2868 /** 2869 * phylink_mii_ioctl() - generic mii ioctl interface 2870 * @pl: a pointer to a &struct phylink returned from phylink_create() 2871 * @ifr: a pointer to a &struct ifreq for socket ioctls 2872 * @cmd: ioctl cmd to execute 2873 * 2874 * Perform the specified MII ioctl on the PHY attached to the phylink instance 2875 * specified by @pl. If no PHY is attached, emulate the presence of the PHY. 2876 * 2877 * Returns: zero on success or negative error code. 2878 * 2879 * %SIOCGMIIPHY: 2880 * read register from the current PHY. 2881 * %SIOCGMIIREG: 2882 * read register from the specified PHY. 2883 * %SIOCSMIIREG: 2884 * set a register on the specified PHY. 2885 */ 2886 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd) 2887 { 2888 struct mii_ioctl_data *mii = if_mii(ifr); 2889 int ret; 2890 2891 ASSERT_RTNL(); 2892 2893 if (pl->phydev) { 2894 /* PHYs only exist for MLO_AN_PHY and SGMII */ 2895 switch (cmd) { 2896 case SIOCGMIIPHY: 2897 mii->phy_id = pl->phydev->mdio.addr; 2898 fallthrough; 2899 2900 case SIOCGMIIREG: 2901 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num); 2902 if (ret >= 0) { 2903 mii->val_out = ret; 2904 ret = 0; 2905 } 2906 break; 2907 2908 case SIOCSMIIREG: 2909 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num, 2910 mii->val_in); 2911 break; 2912 2913 default: 2914 ret = phy_mii_ioctl(pl->phydev, ifr, cmd); 2915 break; 2916 } 2917 } else { 2918 switch (cmd) { 2919 case SIOCGMIIPHY: 2920 mii->phy_id = 0; 2921 fallthrough; 2922 2923 case SIOCGMIIREG: 2924 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num); 2925 if (ret >= 0) { 2926 mii->val_out = ret; 2927 ret = 0; 2928 } 2929 break; 2930 2931 case SIOCSMIIREG: 2932 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num, 2933 mii->val_in); 2934 break; 2935 2936 default: 2937 ret = -EOPNOTSUPP; 2938 break; 2939 } 2940 } 2941 2942 return ret; 2943 } 2944 EXPORT_SYMBOL_GPL(phylink_mii_ioctl); 2945 2946 /** 2947 * phylink_speed_down() - set the non-SFP PHY to lowest speed supported by both 2948 * link partners 2949 * @pl: a pointer to a &struct phylink returned from phylink_create() 2950 * @sync: perform action synchronously 2951 * 2952 * If we have a PHY that is not part of a SFP module, then set the speed 2953 * as described in the phy_speed_down() function. Please see this function 2954 * for a description of the @sync parameter. 2955 * 2956 * Returns zero if there is no PHY, otherwise as per phy_speed_down(). 2957 */ 2958 int phylink_speed_down(struct phylink *pl, bool sync) 2959 { 2960 int ret = 0; 2961 2962 ASSERT_RTNL(); 2963 2964 if (!pl->sfp_bus && pl->phydev) 2965 ret = phy_speed_down(pl->phydev, sync); 2966 2967 return ret; 2968 } 2969 EXPORT_SYMBOL_GPL(phylink_speed_down); 2970 2971 /** 2972 * phylink_speed_up() - restore the advertised speeds prior to the call to 2973 * phylink_speed_down() 2974 * @pl: a pointer to a &struct phylink returned from phylink_create() 2975 * 2976 * If we have a PHY that is not part of a SFP module, then restore the 2977 * PHY speeds as per phy_speed_up(). 2978 * 2979 * Returns zero if there is no PHY, otherwise as per phy_speed_up(). 2980 */ 2981 int phylink_speed_up(struct phylink *pl) 2982 { 2983 int ret = 0; 2984 2985 ASSERT_RTNL(); 2986 2987 if (!pl->sfp_bus && pl->phydev) 2988 ret = phy_speed_up(pl->phydev); 2989 2990 return ret; 2991 } 2992 EXPORT_SYMBOL_GPL(phylink_speed_up); 2993 2994 static void phylink_sfp_attach(void *upstream, struct sfp_bus *bus) 2995 { 2996 struct phylink *pl = upstream; 2997 2998 pl->netdev->sfp_bus = bus; 2999 } 3000 3001 static void phylink_sfp_detach(void *upstream, struct sfp_bus *bus) 3002 { 3003 struct phylink *pl = upstream; 3004 3005 pl->netdev->sfp_bus = NULL; 3006 } 3007 3008 static const phy_interface_t phylink_sfp_interface_preference[] = { 3009 PHY_INTERFACE_MODE_25GBASER, 3010 PHY_INTERFACE_MODE_USXGMII, 3011 PHY_INTERFACE_MODE_10GBASER, 3012 PHY_INTERFACE_MODE_5GBASER, 3013 PHY_INTERFACE_MODE_2500BASEX, 3014 PHY_INTERFACE_MODE_SGMII, 3015 PHY_INTERFACE_MODE_1000BASEX, 3016 PHY_INTERFACE_MODE_100BASEX, 3017 }; 3018 3019 static DECLARE_PHY_INTERFACE_MASK(phylink_sfp_interfaces); 3020 3021 static phy_interface_t phylink_choose_sfp_interface(struct phylink *pl, 3022 const unsigned long *intf) 3023 { 3024 phy_interface_t interface; 3025 size_t i; 3026 3027 interface = PHY_INTERFACE_MODE_NA; 3028 for (i = 0; i < ARRAY_SIZE(phylink_sfp_interface_preference); i++) 3029 if (test_bit(phylink_sfp_interface_preference[i], intf)) { 3030 interface = phylink_sfp_interface_preference[i]; 3031 break; 3032 } 3033 3034 return interface; 3035 } 3036 3037 static void phylink_sfp_set_config(struct phylink *pl, u8 mode, 3038 unsigned long *supported, 3039 struct phylink_link_state *state) 3040 { 3041 bool changed = false; 3042 3043 phylink_dbg(pl, "requesting link mode %s/%s with support %*pb\n", 3044 phylink_an_mode_str(mode), phy_modes(state->interface), 3045 __ETHTOOL_LINK_MODE_MASK_NBITS, supported); 3046 3047 if (!linkmode_equal(pl->supported, supported)) { 3048 linkmode_copy(pl->supported, supported); 3049 changed = true; 3050 } 3051 3052 if (!linkmode_equal(pl->link_config.advertising, state->advertising)) { 3053 linkmode_copy(pl->link_config.advertising, state->advertising); 3054 changed = true; 3055 } 3056 3057 if (pl->cur_link_an_mode != mode || 3058 pl->link_config.interface != state->interface) { 3059 pl->cur_link_an_mode = mode; 3060 pl->link_config.interface = state->interface; 3061 3062 changed = true; 3063 3064 phylink_info(pl, "switched to %s/%s link mode\n", 3065 phylink_an_mode_str(mode), 3066 phy_modes(state->interface)); 3067 } 3068 3069 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED, 3070 &pl->phylink_disable_state)) 3071 phylink_mac_initial_config(pl, false); 3072 } 3073 3074 static int phylink_sfp_config_phy(struct phylink *pl, u8 mode, 3075 struct phy_device *phy) 3076 { 3077 __ETHTOOL_DECLARE_LINK_MODE_MASK(support1); 3078 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 3079 struct phylink_link_state config; 3080 phy_interface_t iface; 3081 int ret; 3082 3083 linkmode_copy(support, phy->supported); 3084 3085 memset(&config, 0, sizeof(config)); 3086 linkmode_copy(config.advertising, phy->advertising); 3087 config.interface = PHY_INTERFACE_MODE_NA; 3088 config.speed = SPEED_UNKNOWN; 3089 config.duplex = DUPLEX_UNKNOWN; 3090 config.pause = MLO_PAUSE_AN; 3091 3092 /* Ignore errors if we're expecting a PHY to attach later */ 3093 ret = phylink_validate(pl, support, &config); 3094 if (ret) { 3095 phylink_err(pl, "validation with support %*pb failed: %pe\n", 3096 __ETHTOOL_LINK_MODE_MASK_NBITS, support, 3097 ERR_PTR(ret)); 3098 return ret; 3099 } 3100 3101 iface = sfp_select_interface(pl->sfp_bus, config.advertising); 3102 if (iface == PHY_INTERFACE_MODE_NA) { 3103 phylink_err(pl, 3104 "selection of interface failed, advertisement %*pb\n", 3105 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising); 3106 return -EINVAL; 3107 } 3108 3109 config.interface = iface; 3110 linkmode_copy(support1, support); 3111 ret = phylink_validate(pl, support1, &config); 3112 if (ret) { 3113 phylink_err(pl, 3114 "validation of %s/%s with support %*pb failed: %pe\n", 3115 phylink_an_mode_str(mode), 3116 phy_modes(config.interface), 3117 __ETHTOOL_LINK_MODE_MASK_NBITS, support, 3118 ERR_PTR(ret)); 3119 return ret; 3120 } 3121 3122 pl->link_port = pl->sfp_port; 3123 3124 phylink_sfp_set_config(pl, mode, support, &config); 3125 3126 return 0; 3127 } 3128 3129 static int phylink_sfp_config_optical(struct phylink *pl) 3130 { 3131 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 3132 DECLARE_PHY_INTERFACE_MASK(interfaces); 3133 struct phylink_link_state config; 3134 phy_interface_t interface; 3135 int ret; 3136 3137 phylink_dbg(pl, "optical SFP: interfaces=[mac=%*pbl, sfp=%*pbl]\n", 3138 (int)PHY_INTERFACE_MODE_MAX, 3139 pl->config->supported_interfaces, 3140 (int)PHY_INTERFACE_MODE_MAX, 3141 pl->sfp_interfaces); 3142 3143 /* Find the union of the supported interfaces by the PCS/MAC and 3144 * the SFP module. 3145 */ 3146 phy_interface_and(interfaces, pl->config->supported_interfaces, 3147 pl->sfp_interfaces); 3148 if (phy_interface_empty(interfaces)) { 3149 phylink_err(pl, "unsupported SFP module: no common interface modes\n"); 3150 return -EINVAL; 3151 } 3152 3153 memset(&config, 0, sizeof(config)); 3154 linkmode_copy(support, pl->sfp_support); 3155 linkmode_copy(config.advertising, pl->sfp_support); 3156 config.speed = SPEED_UNKNOWN; 3157 config.duplex = DUPLEX_UNKNOWN; 3158 config.pause = MLO_PAUSE_AN; 3159 3160 /* For all the interfaces that are supported, reduce the sfp_support 3161 * mask to only those link modes that can be supported. 3162 */ 3163 ret = phylink_validate_mask(pl, pl->sfp_support, &config, interfaces); 3164 if (ret) { 3165 phylink_err(pl, "unsupported SFP module: validation with support %*pb failed\n", 3166 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 3167 return ret; 3168 } 3169 3170 interface = phylink_choose_sfp_interface(pl, interfaces); 3171 if (interface == PHY_INTERFACE_MODE_NA) { 3172 phylink_err(pl, "failed to select SFP interface\n"); 3173 return -EINVAL; 3174 } 3175 3176 phylink_dbg(pl, "optical SFP: chosen %s interface\n", 3177 phy_modes(interface)); 3178 3179 config.interface = interface; 3180 3181 /* Ignore errors if we're expecting a PHY to attach later */ 3182 ret = phylink_validate(pl, support, &config); 3183 if (ret) { 3184 phylink_err(pl, "validation with support %*pb failed: %pe\n", 3185 __ETHTOOL_LINK_MODE_MASK_NBITS, support, 3186 ERR_PTR(ret)); 3187 return ret; 3188 } 3189 3190 pl->link_port = pl->sfp_port; 3191 3192 phylink_sfp_set_config(pl, MLO_AN_INBAND, pl->sfp_support, &config); 3193 3194 return 0; 3195 } 3196 3197 static int phylink_sfp_module_insert(void *upstream, 3198 const struct sfp_eeprom_id *id) 3199 { 3200 struct phylink *pl = upstream; 3201 3202 ASSERT_RTNL(); 3203 3204 linkmode_zero(pl->sfp_support); 3205 phy_interface_zero(pl->sfp_interfaces); 3206 sfp_parse_support(pl->sfp_bus, id, pl->sfp_support, pl->sfp_interfaces); 3207 pl->sfp_port = sfp_parse_port(pl->sfp_bus, id, pl->sfp_support); 3208 3209 /* If this module may have a PHY connecting later, defer until later */ 3210 pl->sfp_may_have_phy = sfp_may_have_phy(pl->sfp_bus, id); 3211 if (pl->sfp_may_have_phy) 3212 return 0; 3213 3214 return phylink_sfp_config_optical(pl); 3215 } 3216 3217 static int phylink_sfp_module_start(void *upstream) 3218 { 3219 struct phylink *pl = upstream; 3220 3221 /* If this SFP module has a PHY, start the PHY now. */ 3222 if (pl->phydev) { 3223 phy_start(pl->phydev); 3224 return 0; 3225 } 3226 3227 /* If the module may have a PHY but we didn't detect one we 3228 * need to configure the MAC here. 3229 */ 3230 if (!pl->sfp_may_have_phy) 3231 return 0; 3232 3233 return phylink_sfp_config_optical(pl); 3234 } 3235 3236 static void phylink_sfp_module_stop(void *upstream) 3237 { 3238 struct phylink *pl = upstream; 3239 3240 /* If this SFP module has a PHY, stop it. */ 3241 if (pl->phydev) 3242 phy_stop(pl->phydev); 3243 } 3244 3245 static void phylink_sfp_link_down(void *upstream) 3246 { 3247 struct phylink *pl = upstream; 3248 3249 ASSERT_RTNL(); 3250 3251 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_LINK); 3252 } 3253 3254 static void phylink_sfp_link_up(void *upstream) 3255 { 3256 struct phylink *pl = upstream; 3257 3258 ASSERT_RTNL(); 3259 3260 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_LINK); 3261 } 3262 3263 /* The Broadcom BCM84881 in the Methode DM7052 is unable to provide a SGMII 3264 * or 802.3z control word, so inband will not work. 3265 */ 3266 static bool phylink_phy_no_inband(struct phy_device *phy) 3267 { 3268 return phy->is_c45 && phy_id_compare(phy->c45_ids.device_ids[1], 3269 0xae025150, 0xfffffff0); 3270 } 3271 3272 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy) 3273 { 3274 struct phylink *pl = upstream; 3275 phy_interface_t interface; 3276 u8 mode; 3277 int ret; 3278 3279 /* 3280 * This is the new way of dealing with flow control for PHYs, 3281 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 3282 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 3283 * using our validate call to the MAC, we rely upon the MAC 3284 * clearing the bits from both supported and advertising fields. 3285 */ 3286 phy_support_asym_pause(phy); 3287 3288 if (phylink_phy_no_inband(phy)) 3289 mode = MLO_AN_PHY; 3290 else 3291 mode = MLO_AN_INBAND; 3292 3293 /* Set the PHY's host supported interfaces */ 3294 phy_interface_and(phy->host_interfaces, phylink_sfp_interfaces, 3295 pl->config->supported_interfaces); 3296 3297 /* Do the initial configuration */ 3298 ret = phylink_sfp_config_phy(pl, mode, phy); 3299 if (ret < 0) 3300 return ret; 3301 3302 interface = pl->link_config.interface; 3303 ret = phylink_attach_phy(pl, phy, interface); 3304 if (ret < 0) 3305 return ret; 3306 3307 ret = phylink_bringup_phy(pl, phy, interface); 3308 if (ret) 3309 phy_detach(phy); 3310 3311 return ret; 3312 } 3313 3314 static void phylink_sfp_disconnect_phy(void *upstream) 3315 { 3316 phylink_disconnect_phy(upstream); 3317 } 3318 3319 static const struct sfp_upstream_ops sfp_phylink_ops = { 3320 .attach = phylink_sfp_attach, 3321 .detach = phylink_sfp_detach, 3322 .module_insert = phylink_sfp_module_insert, 3323 .module_start = phylink_sfp_module_start, 3324 .module_stop = phylink_sfp_module_stop, 3325 .link_up = phylink_sfp_link_up, 3326 .link_down = phylink_sfp_link_down, 3327 .connect_phy = phylink_sfp_connect_phy, 3328 .disconnect_phy = phylink_sfp_disconnect_phy, 3329 }; 3330 3331 /* Helpers for MAC drivers */ 3332 3333 static struct { 3334 int bit; 3335 int speed; 3336 } phylink_c73_priority_resolution[] = { 3337 { ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT, SPEED_100000 }, 3338 { ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT, SPEED_100000 }, 3339 /* 100GBASE-KP4 and 100GBASE-CR10 not supported */ 3340 { ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT, SPEED_40000 }, 3341 { ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT, SPEED_40000 }, 3342 { ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, SPEED_10000 }, 3343 { ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, SPEED_10000 }, 3344 /* 5GBASE-KR not supported */ 3345 { ETHTOOL_LINK_MODE_2500baseX_Full_BIT, SPEED_2500 }, 3346 { ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, SPEED_1000 }, 3347 }; 3348 3349 void phylink_resolve_c73(struct phylink_link_state *state) 3350 { 3351 int i; 3352 3353 for (i = 0; i < ARRAY_SIZE(phylink_c73_priority_resolution); i++) { 3354 int bit = phylink_c73_priority_resolution[i].bit; 3355 if (linkmode_test_bit(bit, state->advertising) && 3356 linkmode_test_bit(bit, state->lp_advertising)) 3357 break; 3358 } 3359 3360 if (i < ARRAY_SIZE(phylink_c73_priority_resolution)) { 3361 state->speed = phylink_c73_priority_resolution[i].speed; 3362 state->duplex = DUPLEX_FULL; 3363 } else { 3364 /* negotiation failure */ 3365 state->link = false; 3366 } 3367 3368 phylink_resolve_an_pause(state); 3369 } 3370 EXPORT_SYMBOL_GPL(phylink_resolve_c73); 3371 3372 static void phylink_decode_c37_word(struct phylink_link_state *state, 3373 uint16_t config_reg, int speed) 3374 { 3375 int fd_bit; 3376 3377 if (speed == SPEED_2500) 3378 fd_bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT; 3379 else 3380 fd_bit = ETHTOOL_LINK_MODE_1000baseX_Full_BIT; 3381 3382 mii_lpa_mod_linkmode_x(state->lp_advertising, config_reg, fd_bit); 3383 3384 if (linkmode_test_bit(fd_bit, state->advertising) && 3385 linkmode_test_bit(fd_bit, state->lp_advertising)) { 3386 state->speed = speed; 3387 state->duplex = DUPLEX_FULL; 3388 } else { 3389 /* negotiation failure */ 3390 state->link = false; 3391 } 3392 3393 phylink_resolve_an_pause(state); 3394 } 3395 3396 static void phylink_decode_sgmii_word(struct phylink_link_state *state, 3397 uint16_t config_reg) 3398 { 3399 if (!(config_reg & LPA_SGMII_LINK)) { 3400 state->link = false; 3401 return; 3402 } 3403 3404 switch (config_reg & LPA_SGMII_SPD_MASK) { 3405 case LPA_SGMII_10: 3406 state->speed = SPEED_10; 3407 break; 3408 case LPA_SGMII_100: 3409 state->speed = SPEED_100; 3410 break; 3411 case LPA_SGMII_1000: 3412 state->speed = SPEED_1000; 3413 break; 3414 default: 3415 state->link = false; 3416 return; 3417 } 3418 if (config_reg & LPA_SGMII_FULL_DUPLEX) 3419 state->duplex = DUPLEX_FULL; 3420 else 3421 state->duplex = DUPLEX_HALF; 3422 } 3423 3424 /** 3425 * phylink_decode_usxgmii_word() - decode the USXGMII word from a MAC PCS 3426 * @state: a pointer to a struct phylink_link_state. 3427 * @lpa: a 16 bit value which stores the USXGMII auto-negotiation word 3428 * 3429 * Helper for MAC PCS supporting the USXGMII protocol and the auto-negotiation 3430 * code word. Decode the USXGMII code word and populate the corresponding fields 3431 * (speed, duplex) into the phylink_link_state structure. 3432 */ 3433 void phylink_decode_usxgmii_word(struct phylink_link_state *state, 3434 uint16_t lpa) 3435 { 3436 switch (lpa & MDIO_USXGMII_SPD_MASK) { 3437 case MDIO_USXGMII_10: 3438 state->speed = SPEED_10; 3439 break; 3440 case MDIO_USXGMII_100: 3441 state->speed = SPEED_100; 3442 break; 3443 case MDIO_USXGMII_1000: 3444 state->speed = SPEED_1000; 3445 break; 3446 case MDIO_USXGMII_2500: 3447 state->speed = SPEED_2500; 3448 break; 3449 case MDIO_USXGMII_5000: 3450 state->speed = SPEED_5000; 3451 break; 3452 case MDIO_USXGMII_10G: 3453 state->speed = SPEED_10000; 3454 break; 3455 default: 3456 state->link = false; 3457 return; 3458 } 3459 3460 if (lpa & MDIO_USXGMII_FULL_DUPLEX) 3461 state->duplex = DUPLEX_FULL; 3462 else 3463 state->duplex = DUPLEX_HALF; 3464 } 3465 EXPORT_SYMBOL_GPL(phylink_decode_usxgmii_word); 3466 3467 /** 3468 * phylink_decode_usgmii_word() - decode the USGMII word from a MAC PCS 3469 * @state: a pointer to a struct phylink_link_state. 3470 * @lpa: a 16 bit value which stores the USGMII auto-negotiation word 3471 * 3472 * Helper for MAC PCS supporting the USGMII protocol and the auto-negotiation 3473 * code word. Decode the USGMII code word and populate the corresponding fields 3474 * (speed, duplex) into the phylink_link_state structure. The structure for this 3475 * word is the same as the USXGMII word, except it only supports speeds up to 3476 * 1Gbps. 3477 */ 3478 static void phylink_decode_usgmii_word(struct phylink_link_state *state, 3479 uint16_t lpa) 3480 { 3481 switch (lpa & MDIO_USXGMII_SPD_MASK) { 3482 case MDIO_USXGMII_10: 3483 state->speed = SPEED_10; 3484 break; 3485 case MDIO_USXGMII_100: 3486 state->speed = SPEED_100; 3487 break; 3488 case MDIO_USXGMII_1000: 3489 state->speed = SPEED_1000; 3490 break; 3491 default: 3492 state->link = false; 3493 return; 3494 } 3495 3496 if (lpa & MDIO_USXGMII_FULL_DUPLEX) 3497 state->duplex = DUPLEX_FULL; 3498 else 3499 state->duplex = DUPLEX_HALF; 3500 } 3501 3502 /** 3503 * phylink_mii_c22_pcs_decode_state() - Decode MAC PCS state from MII registers 3504 * @state: a pointer to a &struct phylink_link_state. 3505 * @bmsr: The value of the %MII_BMSR register 3506 * @lpa: The value of the %MII_LPA register 3507 * 3508 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 3509 * clause 37 negotiation and/or SGMII control. 3510 * 3511 * Parse the Clause 37 or Cisco SGMII link partner negotiation word into 3512 * the phylink @state structure. This is suitable to be used for implementing 3513 * the pcs_get_state() member of the struct phylink_pcs_ops structure if 3514 * accessing @bmsr and @lpa cannot be done with MDIO directly. 3515 */ 3516 void phylink_mii_c22_pcs_decode_state(struct phylink_link_state *state, 3517 u16 bmsr, u16 lpa) 3518 { 3519 state->link = !!(bmsr & BMSR_LSTATUS); 3520 state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE); 3521 /* If there is no link or autonegotiation is disabled, the LP advertisement 3522 * data is not meaningful, so don't go any further. 3523 */ 3524 if (!state->link || !linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 3525 state->advertising)) 3526 return; 3527 3528 switch (state->interface) { 3529 case PHY_INTERFACE_MODE_1000BASEX: 3530 phylink_decode_c37_word(state, lpa, SPEED_1000); 3531 break; 3532 3533 case PHY_INTERFACE_MODE_2500BASEX: 3534 phylink_decode_c37_word(state, lpa, SPEED_2500); 3535 break; 3536 3537 case PHY_INTERFACE_MODE_SGMII: 3538 case PHY_INTERFACE_MODE_QSGMII: 3539 phylink_decode_sgmii_word(state, lpa); 3540 break; 3541 case PHY_INTERFACE_MODE_QUSGMII: 3542 phylink_decode_usgmii_word(state, lpa); 3543 break; 3544 3545 default: 3546 state->link = false; 3547 break; 3548 } 3549 } 3550 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_decode_state); 3551 3552 /** 3553 * phylink_mii_c22_pcs_get_state() - read the MAC PCS state 3554 * @pcs: a pointer to a &struct mdio_device. 3555 * @state: a pointer to a &struct phylink_link_state. 3556 * 3557 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 3558 * clause 37 negotiation and/or SGMII control. 3559 * 3560 * Read the MAC PCS state from the MII device configured in @config and 3561 * parse the Clause 37 or Cisco SGMII link partner negotiation word into 3562 * the phylink @state structure. This is suitable to be directly plugged 3563 * into the pcs_get_state() member of the struct phylink_pcs_ops 3564 * structure. 3565 */ 3566 void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs, 3567 struct phylink_link_state *state) 3568 { 3569 int bmsr, lpa; 3570 3571 bmsr = mdiodev_read(pcs, MII_BMSR); 3572 lpa = mdiodev_read(pcs, MII_LPA); 3573 if (bmsr < 0 || lpa < 0) { 3574 state->link = false; 3575 return; 3576 } 3577 3578 phylink_mii_c22_pcs_decode_state(state, bmsr, lpa); 3579 } 3580 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_get_state); 3581 3582 /** 3583 * phylink_mii_c22_pcs_encode_advertisement() - configure the clause 37 PCS 3584 * advertisement 3585 * @interface: the PHY interface mode being configured 3586 * @advertising: the ethtool advertisement mask 3587 * 3588 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 3589 * clause 37 negotiation and/or SGMII control. 3590 * 3591 * Encode the clause 37 PCS advertisement as specified by @interface and 3592 * @advertising. 3593 * 3594 * Return: The new value for @adv, or ``-EINVAL`` if it should not be changed. 3595 */ 3596 int phylink_mii_c22_pcs_encode_advertisement(phy_interface_t interface, 3597 const unsigned long *advertising) 3598 { 3599 u16 adv; 3600 3601 switch (interface) { 3602 case PHY_INTERFACE_MODE_1000BASEX: 3603 case PHY_INTERFACE_MODE_2500BASEX: 3604 adv = ADVERTISE_1000XFULL; 3605 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 3606 advertising)) 3607 adv |= ADVERTISE_1000XPAUSE; 3608 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 3609 advertising)) 3610 adv |= ADVERTISE_1000XPSE_ASYM; 3611 return adv; 3612 case PHY_INTERFACE_MODE_SGMII: 3613 case PHY_INTERFACE_MODE_QSGMII: 3614 return 0x0001; 3615 default: 3616 /* Nothing to do for other modes */ 3617 return -EINVAL; 3618 } 3619 } 3620 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_encode_advertisement); 3621 3622 /** 3623 * phylink_mii_c22_pcs_config() - configure clause 22 PCS 3624 * @pcs: a pointer to a &struct mdio_device. 3625 * @interface: the PHY interface mode being configured 3626 * @advertising: the ethtool advertisement mask 3627 * @neg_mode: PCS negotiation mode 3628 * 3629 * Configure a Clause 22 PCS PHY with the appropriate negotiation 3630 * parameters for the @mode, @interface and @advertising parameters. 3631 * Returns negative error number on failure, zero if the advertisement 3632 * has not changed, or positive if there is a change. 3633 */ 3634 int phylink_mii_c22_pcs_config(struct mdio_device *pcs, 3635 phy_interface_t interface, 3636 const unsigned long *advertising, 3637 unsigned int neg_mode) 3638 { 3639 bool changed = 0; 3640 u16 bmcr; 3641 int ret, adv; 3642 3643 adv = phylink_mii_c22_pcs_encode_advertisement(interface, advertising); 3644 if (adv >= 0) { 3645 ret = mdiobus_modify_changed(pcs->bus, pcs->addr, 3646 MII_ADVERTISE, 0xffff, adv); 3647 if (ret < 0) 3648 return ret; 3649 changed = ret; 3650 } 3651 3652 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) 3653 bmcr = BMCR_ANENABLE; 3654 else 3655 bmcr = 0; 3656 3657 /* Configure the inband state. Ensure ISOLATE bit is disabled */ 3658 ret = mdiodev_modify(pcs, MII_BMCR, BMCR_ANENABLE | BMCR_ISOLATE, bmcr); 3659 if (ret < 0) 3660 return ret; 3661 3662 return changed; 3663 } 3664 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config); 3665 3666 /** 3667 * phylink_mii_c22_pcs_an_restart() - restart 802.3z autonegotiation 3668 * @pcs: a pointer to a &struct mdio_device. 3669 * 3670 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 3671 * clause 37 negotiation. 3672 * 3673 * Restart the clause 37 negotiation with the link partner. This is 3674 * suitable to be directly plugged into the pcs_get_state() member 3675 * of the struct phylink_pcs_ops structure. 3676 */ 3677 void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs) 3678 { 3679 int val = mdiodev_read(pcs, MII_BMCR); 3680 3681 if (val >= 0) { 3682 val |= BMCR_ANRESTART; 3683 3684 mdiodev_write(pcs, MII_BMCR, val); 3685 } 3686 } 3687 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_an_restart); 3688 3689 void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs, 3690 struct phylink_link_state *state) 3691 { 3692 struct mii_bus *bus = pcs->bus; 3693 int addr = pcs->addr; 3694 int stat; 3695 3696 stat = mdiobus_c45_read(bus, addr, MDIO_MMD_PCS, MDIO_STAT1); 3697 if (stat < 0) { 3698 state->link = false; 3699 return; 3700 } 3701 3702 state->link = !!(stat & MDIO_STAT1_LSTATUS); 3703 if (!state->link) 3704 return; 3705 3706 switch (state->interface) { 3707 case PHY_INTERFACE_MODE_10GBASER: 3708 state->speed = SPEED_10000; 3709 state->duplex = DUPLEX_FULL; 3710 break; 3711 3712 default: 3713 break; 3714 } 3715 } 3716 EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state); 3717 3718 static int __init phylink_init(void) 3719 { 3720 for (int i = 0; i < ARRAY_SIZE(phylink_sfp_interface_preference); ++i) 3721 __set_bit(phylink_sfp_interface_preference[i], 3722 phylink_sfp_interfaces); 3723 3724 return 0; 3725 } 3726 3727 module_init(phylink_init); 3728 3729 MODULE_LICENSE("GPL v2"); 3730 MODULE_DESCRIPTION("phylink models the MAC to optional PHY connection"); 3731