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 void phylink_caps_to_linkmodes(unsigned long *linkmodes, unsigned long caps) 261 { 262 if (caps & MAC_SYM_PAUSE) 263 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, linkmodes); 264 265 if (caps & MAC_ASYM_PAUSE) 266 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, linkmodes); 267 268 if (caps & MAC_10HD) { 269 __set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, linkmodes); 270 __set_bit(ETHTOOL_LINK_MODE_10baseT1S_Half_BIT, linkmodes); 271 __set_bit(ETHTOOL_LINK_MODE_10baseT1S_P2MP_Half_BIT, linkmodes); 272 } 273 274 if (caps & MAC_10FD) { 275 __set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, linkmodes); 276 __set_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT, linkmodes); 277 __set_bit(ETHTOOL_LINK_MODE_10baseT1S_Full_BIT, linkmodes); 278 } 279 280 if (caps & MAC_100HD) { 281 __set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, linkmodes); 282 __set_bit(ETHTOOL_LINK_MODE_100baseFX_Half_BIT, linkmodes); 283 } 284 285 if (caps & MAC_100FD) { 286 __set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, linkmodes); 287 __set_bit(ETHTOOL_LINK_MODE_100baseT1_Full_BIT, linkmodes); 288 __set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT, linkmodes); 289 } 290 291 if (caps & MAC_1000HD) 292 __set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, linkmodes); 293 294 if (caps & MAC_1000FD) { 295 __set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, linkmodes); 296 __set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, linkmodes); 297 __set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, linkmodes); 298 __set_bit(ETHTOOL_LINK_MODE_1000baseT1_Full_BIT, linkmodes); 299 } 300 301 if (caps & MAC_2500FD) { 302 __set_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, linkmodes); 303 __set_bit(ETHTOOL_LINK_MODE_2500baseX_Full_BIT, linkmodes); 304 } 305 306 if (caps & MAC_5000FD) 307 __set_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT, linkmodes); 308 309 if (caps & MAC_10000FD) { 310 __set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, linkmodes); 311 __set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, linkmodes); 312 __set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, linkmodes); 313 __set_bit(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT, linkmodes); 314 __set_bit(ETHTOOL_LINK_MODE_10000baseCR_Full_BIT, linkmodes); 315 __set_bit(ETHTOOL_LINK_MODE_10000baseSR_Full_BIT, linkmodes); 316 __set_bit(ETHTOOL_LINK_MODE_10000baseLR_Full_BIT, linkmodes); 317 __set_bit(ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT, linkmodes); 318 __set_bit(ETHTOOL_LINK_MODE_10000baseER_Full_BIT, linkmodes); 319 } 320 321 if (caps & MAC_25000FD) { 322 __set_bit(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT, linkmodes); 323 __set_bit(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT, linkmodes); 324 __set_bit(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT, linkmodes); 325 } 326 327 if (caps & MAC_40000FD) { 328 __set_bit(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT, linkmodes); 329 __set_bit(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT, linkmodes); 330 __set_bit(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT, linkmodes); 331 __set_bit(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT, linkmodes); 332 } 333 334 if (caps & MAC_50000FD) { 335 __set_bit(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT, linkmodes); 336 __set_bit(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT, linkmodes); 337 __set_bit(ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT, linkmodes); 338 __set_bit(ETHTOOL_LINK_MODE_50000baseKR_Full_BIT, linkmodes); 339 __set_bit(ETHTOOL_LINK_MODE_50000baseSR_Full_BIT, linkmodes); 340 __set_bit(ETHTOOL_LINK_MODE_50000baseCR_Full_BIT, linkmodes); 341 __set_bit(ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT, 342 linkmodes); 343 __set_bit(ETHTOOL_LINK_MODE_50000baseDR_Full_BIT, linkmodes); 344 } 345 346 if (caps & MAC_56000FD) { 347 __set_bit(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT, linkmodes); 348 __set_bit(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT, linkmodes); 349 __set_bit(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT, linkmodes); 350 __set_bit(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT, linkmodes); 351 } 352 353 if (caps & MAC_100000FD) { 354 __set_bit(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT, linkmodes); 355 __set_bit(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT, linkmodes); 356 __set_bit(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT, linkmodes); 357 __set_bit(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT, 358 linkmodes); 359 __set_bit(ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT, linkmodes); 360 __set_bit(ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT, linkmodes); 361 __set_bit(ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT, linkmodes); 362 __set_bit(ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT, 363 linkmodes); 364 __set_bit(ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT, linkmodes); 365 __set_bit(ETHTOOL_LINK_MODE_100000baseKR_Full_BIT, linkmodes); 366 __set_bit(ETHTOOL_LINK_MODE_100000baseSR_Full_BIT, linkmodes); 367 __set_bit(ETHTOOL_LINK_MODE_100000baseLR_ER_FR_Full_BIT, 368 linkmodes); 369 __set_bit(ETHTOOL_LINK_MODE_100000baseCR_Full_BIT, linkmodes); 370 __set_bit(ETHTOOL_LINK_MODE_100000baseDR_Full_BIT, linkmodes); 371 } 372 373 if (caps & MAC_200000FD) { 374 __set_bit(ETHTOOL_LINK_MODE_200000baseKR4_Full_BIT, linkmodes); 375 __set_bit(ETHTOOL_LINK_MODE_200000baseSR4_Full_BIT, linkmodes); 376 __set_bit(ETHTOOL_LINK_MODE_200000baseLR4_ER4_FR4_Full_BIT, 377 linkmodes); 378 __set_bit(ETHTOOL_LINK_MODE_200000baseDR4_Full_BIT, linkmodes); 379 __set_bit(ETHTOOL_LINK_MODE_200000baseCR4_Full_BIT, linkmodes); 380 __set_bit(ETHTOOL_LINK_MODE_200000baseKR2_Full_BIT, linkmodes); 381 __set_bit(ETHTOOL_LINK_MODE_200000baseSR2_Full_BIT, linkmodes); 382 __set_bit(ETHTOOL_LINK_MODE_200000baseLR2_ER2_FR2_Full_BIT, 383 linkmodes); 384 __set_bit(ETHTOOL_LINK_MODE_200000baseDR2_Full_BIT, linkmodes); 385 __set_bit(ETHTOOL_LINK_MODE_200000baseCR2_Full_BIT, linkmodes); 386 } 387 388 if (caps & MAC_400000FD) { 389 __set_bit(ETHTOOL_LINK_MODE_400000baseKR8_Full_BIT, linkmodes); 390 __set_bit(ETHTOOL_LINK_MODE_400000baseSR8_Full_BIT, linkmodes); 391 __set_bit(ETHTOOL_LINK_MODE_400000baseLR8_ER8_FR8_Full_BIT, 392 linkmodes); 393 __set_bit(ETHTOOL_LINK_MODE_400000baseDR8_Full_BIT, linkmodes); 394 __set_bit(ETHTOOL_LINK_MODE_400000baseCR8_Full_BIT, linkmodes); 395 __set_bit(ETHTOOL_LINK_MODE_400000baseKR4_Full_BIT, linkmodes); 396 __set_bit(ETHTOOL_LINK_MODE_400000baseSR4_Full_BIT, linkmodes); 397 __set_bit(ETHTOOL_LINK_MODE_400000baseLR4_ER4_FR4_Full_BIT, 398 linkmodes); 399 __set_bit(ETHTOOL_LINK_MODE_400000baseDR4_Full_BIT, linkmodes); 400 __set_bit(ETHTOOL_LINK_MODE_400000baseCR4_Full_BIT, linkmodes); 401 } 402 } 403 EXPORT_SYMBOL_GPL(phylink_caps_to_linkmodes); 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 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 EXPORT_SYMBOL_GPL(phylink_get_capabilities); 610 611 /** 612 * phylink_validate_mask_caps() - Restrict link modes based on caps 613 * @supported: ethtool bitmask for supported link modes. 614 * @state: pointer to a &struct phylink_link_state. 615 * @mac_capabilities: bitmask of MAC capabilities 616 * 617 * Calculate the supported link modes based on @mac_capabilities, and restrict 618 * @supported and @state based on that. Use this function if your capabiliies 619 * aren't constant, such as if they vary depending on the interface. 620 */ 621 void phylink_validate_mask_caps(unsigned long *supported, 622 struct phylink_link_state *state, 623 unsigned long mac_capabilities) 624 { 625 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; 626 unsigned long caps; 627 628 phylink_set_port_modes(mask); 629 phylink_set(mask, Autoneg); 630 caps = phylink_get_capabilities(state->interface, mac_capabilities, 631 state->rate_matching); 632 phylink_caps_to_linkmodes(mask, caps); 633 634 linkmode_and(supported, supported, mask); 635 linkmode_and(state->advertising, state->advertising, mask); 636 } 637 EXPORT_SYMBOL_GPL(phylink_validate_mask_caps); 638 639 /** 640 * phylink_generic_validate() - generic validate() callback implementation 641 * @config: a pointer to a &struct phylink_config. 642 * @supported: ethtool bitmask for supported link modes. 643 * @state: a pointer to a &struct phylink_link_state. 644 * 645 * Generic implementation of the validate() callback that MAC drivers can 646 * use when they pass the range of supported interfaces and MAC capabilities. 647 */ 648 void phylink_generic_validate(struct phylink_config *config, 649 unsigned long *supported, 650 struct phylink_link_state *state) 651 { 652 phylink_validate_mask_caps(supported, state, config->mac_capabilities); 653 } 654 EXPORT_SYMBOL_GPL(phylink_generic_validate); 655 656 static int phylink_validate_mac_and_pcs(struct phylink *pl, 657 unsigned long *supported, 658 struct phylink_link_state *state) 659 { 660 struct phylink_pcs *pcs; 661 int ret; 662 663 /* Get the PCS for this interface mode */ 664 if (pl->using_mac_select_pcs) { 665 pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface); 666 if (IS_ERR(pcs)) 667 return PTR_ERR(pcs); 668 } else { 669 pcs = pl->pcs; 670 } 671 672 if (pcs) { 673 /* The PCS, if present, must be setup before phylink_create() 674 * has been called. If the ops is not initialised, print an 675 * error and backtrace rather than oopsing the kernel. 676 */ 677 if (!pcs->ops) { 678 phylink_err(pl, "interface %s: uninitialised PCS\n", 679 phy_modes(state->interface)); 680 dump_stack(); 681 return -EINVAL; 682 } 683 684 /* Validate the link parameters with the PCS */ 685 if (pcs->ops->pcs_validate) { 686 ret = pcs->ops->pcs_validate(pcs, supported, state); 687 if (ret < 0 || phylink_is_empty_linkmode(supported)) 688 return -EINVAL; 689 690 /* Ensure the advertising mask is a subset of the 691 * supported mask. 692 */ 693 linkmode_and(state->advertising, state->advertising, 694 supported); 695 } 696 } 697 698 /* Then validate the link parameters with the MAC */ 699 if (pl->mac_ops->validate) 700 pl->mac_ops->validate(pl->config, supported, state); 701 else 702 phylink_generic_validate(pl->config, supported, state); 703 704 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; 705 } 706 707 static int phylink_validate_mask(struct phylink *pl, unsigned long *supported, 708 struct phylink_link_state *state, 709 const unsigned long *interfaces) 710 { 711 __ETHTOOL_DECLARE_LINK_MODE_MASK(all_adv) = { 0, }; 712 __ETHTOOL_DECLARE_LINK_MODE_MASK(all_s) = { 0, }; 713 __ETHTOOL_DECLARE_LINK_MODE_MASK(s); 714 struct phylink_link_state t; 715 int intf; 716 717 for (intf = 0; intf < PHY_INTERFACE_MODE_MAX; intf++) { 718 if (test_bit(intf, interfaces)) { 719 linkmode_copy(s, supported); 720 721 t = *state; 722 t.interface = intf; 723 if (!phylink_validate_mac_and_pcs(pl, s, &t)) { 724 linkmode_or(all_s, all_s, s); 725 linkmode_or(all_adv, all_adv, t.advertising); 726 } 727 } 728 } 729 730 linkmode_copy(supported, all_s); 731 linkmode_copy(state->advertising, all_adv); 732 733 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; 734 } 735 736 static int phylink_validate(struct phylink *pl, unsigned long *supported, 737 struct phylink_link_state *state) 738 { 739 const unsigned long *interfaces = pl->config->supported_interfaces; 740 741 if (state->interface == PHY_INTERFACE_MODE_NA) 742 return phylink_validate_mask(pl, supported, state, interfaces); 743 744 if (!test_bit(state->interface, interfaces)) 745 return -EINVAL; 746 747 return phylink_validate_mac_and_pcs(pl, supported, state); 748 } 749 750 static int phylink_parse_fixedlink(struct phylink *pl, 751 const struct fwnode_handle *fwnode) 752 { 753 struct fwnode_handle *fixed_node; 754 bool pause, asym_pause, autoneg; 755 const struct phy_setting *s; 756 struct gpio_desc *desc; 757 u32 speed; 758 int ret; 759 760 fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link"); 761 if (fixed_node) { 762 ret = fwnode_property_read_u32(fixed_node, "speed", &speed); 763 764 pl->link_config.speed = speed; 765 pl->link_config.duplex = DUPLEX_HALF; 766 767 if (fwnode_property_read_bool(fixed_node, "full-duplex")) 768 pl->link_config.duplex = DUPLEX_FULL; 769 770 /* We treat the "pause" and "asym-pause" terminology as 771 * defining the link partner's ability. 772 */ 773 if (fwnode_property_read_bool(fixed_node, "pause")) 774 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 775 pl->link_config.lp_advertising); 776 if (fwnode_property_read_bool(fixed_node, "asym-pause")) 777 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 778 pl->link_config.lp_advertising); 779 780 if (ret == 0) { 781 desc = fwnode_gpiod_get_index(fixed_node, "link", 0, 782 GPIOD_IN, "?"); 783 784 if (!IS_ERR(desc)) 785 pl->link_gpio = desc; 786 else if (desc == ERR_PTR(-EPROBE_DEFER)) 787 ret = -EPROBE_DEFER; 788 } 789 fwnode_handle_put(fixed_node); 790 791 if (ret) 792 return ret; 793 } else { 794 u32 prop[5]; 795 796 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 797 NULL, 0); 798 if (ret != ARRAY_SIZE(prop)) { 799 phylink_err(pl, "broken fixed-link?\n"); 800 return -EINVAL; 801 } 802 803 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 804 prop, ARRAY_SIZE(prop)); 805 if (!ret) { 806 pl->link_config.duplex = prop[1] ? 807 DUPLEX_FULL : DUPLEX_HALF; 808 pl->link_config.speed = prop[2]; 809 if (prop[3]) 810 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 811 pl->link_config.lp_advertising); 812 if (prop[4]) 813 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 814 pl->link_config.lp_advertising); 815 } 816 } 817 818 if (pl->link_config.speed > SPEED_1000 && 819 pl->link_config.duplex != DUPLEX_FULL) 820 phylink_warn(pl, "fixed link specifies half duplex for %dMbps link?\n", 821 pl->link_config.speed); 822 823 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 824 linkmode_copy(pl->link_config.advertising, pl->supported); 825 phylink_validate(pl, pl->supported, &pl->link_config); 826 827 pause = phylink_test(pl->supported, Pause); 828 asym_pause = phylink_test(pl->supported, Asym_Pause); 829 autoneg = phylink_test(pl->supported, Autoneg); 830 s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex, 831 pl->supported, true); 832 linkmode_zero(pl->supported); 833 phylink_set(pl->supported, MII); 834 835 if (pause) 836 phylink_set(pl->supported, Pause); 837 838 if (asym_pause) 839 phylink_set(pl->supported, Asym_Pause); 840 841 if (autoneg) 842 phylink_set(pl->supported, Autoneg); 843 844 if (s) { 845 __set_bit(s->bit, pl->supported); 846 __set_bit(s->bit, pl->link_config.lp_advertising); 847 } else { 848 phylink_warn(pl, "fixed link %s duplex %dMbps not recognised\n", 849 pl->link_config.duplex == DUPLEX_FULL ? "full" : "half", 850 pl->link_config.speed); 851 } 852 853 linkmode_and(pl->link_config.advertising, pl->link_config.advertising, 854 pl->supported); 855 856 pl->link_config.link = 1; 857 pl->link_config.an_complete = 1; 858 859 return 0; 860 } 861 862 static int phylink_parse_mode(struct phylink *pl, 863 const struct fwnode_handle *fwnode) 864 { 865 struct fwnode_handle *dn; 866 const char *managed; 867 868 dn = fwnode_get_named_child_node(fwnode, "fixed-link"); 869 if (dn || fwnode_property_present(fwnode, "fixed-link")) 870 pl->cfg_link_an_mode = MLO_AN_FIXED; 871 fwnode_handle_put(dn); 872 873 if ((fwnode_property_read_string(fwnode, "managed", &managed) == 0 && 874 strcmp(managed, "in-band-status") == 0) || 875 pl->config->ovr_an_inband) { 876 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 877 phylink_err(pl, 878 "can't use both fixed-link and in-band-status\n"); 879 return -EINVAL; 880 } 881 882 linkmode_zero(pl->supported); 883 phylink_set(pl->supported, MII); 884 phylink_set(pl->supported, Autoneg); 885 phylink_set(pl->supported, Asym_Pause); 886 phylink_set(pl->supported, Pause); 887 pl->cfg_link_an_mode = MLO_AN_INBAND; 888 889 switch (pl->link_config.interface) { 890 case PHY_INTERFACE_MODE_SGMII: 891 case PHY_INTERFACE_MODE_PSGMII: 892 case PHY_INTERFACE_MODE_QSGMII: 893 case PHY_INTERFACE_MODE_QUSGMII: 894 case PHY_INTERFACE_MODE_RGMII: 895 case PHY_INTERFACE_MODE_RGMII_ID: 896 case PHY_INTERFACE_MODE_RGMII_RXID: 897 case PHY_INTERFACE_MODE_RGMII_TXID: 898 case PHY_INTERFACE_MODE_RTBI: 899 phylink_set(pl->supported, 10baseT_Half); 900 phylink_set(pl->supported, 10baseT_Full); 901 phylink_set(pl->supported, 100baseT_Half); 902 phylink_set(pl->supported, 100baseT_Full); 903 phylink_set(pl->supported, 1000baseT_Half); 904 phylink_set(pl->supported, 1000baseT_Full); 905 break; 906 907 case PHY_INTERFACE_MODE_1000BASEX: 908 phylink_set(pl->supported, 1000baseX_Full); 909 break; 910 911 case PHY_INTERFACE_MODE_2500BASEX: 912 phylink_set(pl->supported, 2500baseX_Full); 913 break; 914 915 case PHY_INTERFACE_MODE_5GBASER: 916 phylink_set(pl->supported, 5000baseT_Full); 917 break; 918 919 case PHY_INTERFACE_MODE_25GBASER: 920 phylink_set(pl->supported, 25000baseCR_Full); 921 phylink_set(pl->supported, 25000baseKR_Full); 922 phylink_set(pl->supported, 25000baseSR_Full); 923 fallthrough; 924 case PHY_INTERFACE_MODE_USXGMII: 925 case PHY_INTERFACE_MODE_10GKR: 926 case PHY_INTERFACE_MODE_10GBASER: 927 phylink_set(pl->supported, 10baseT_Half); 928 phylink_set(pl->supported, 10baseT_Full); 929 phylink_set(pl->supported, 100baseT_Half); 930 phylink_set(pl->supported, 100baseT_Full); 931 phylink_set(pl->supported, 1000baseT_Half); 932 phylink_set(pl->supported, 1000baseT_Full); 933 phylink_set(pl->supported, 1000baseX_Full); 934 phylink_set(pl->supported, 1000baseKX_Full); 935 phylink_set(pl->supported, 2500baseT_Full); 936 phylink_set(pl->supported, 2500baseX_Full); 937 phylink_set(pl->supported, 5000baseT_Full); 938 phylink_set(pl->supported, 10000baseT_Full); 939 phylink_set(pl->supported, 10000baseKR_Full); 940 phylink_set(pl->supported, 10000baseKX4_Full); 941 phylink_set(pl->supported, 10000baseCR_Full); 942 phylink_set(pl->supported, 10000baseSR_Full); 943 phylink_set(pl->supported, 10000baseLR_Full); 944 phylink_set(pl->supported, 10000baseLRM_Full); 945 phylink_set(pl->supported, 10000baseER_Full); 946 break; 947 948 case PHY_INTERFACE_MODE_XLGMII: 949 phylink_set(pl->supported, 25000baseCR_Full); 950 phylink_set(pl->supported, 25000baseKR_Full); 951 phylink_set(pl->supported, 25000baseSR_Full); 952 phylink_set(pl->supported, 40000baseKR4_Full); 953 phylink_set(pl->supported, 40000baseCR4_Full); 954 phylink_set(pl->supported, 40000baseSR4_Full); 955 phylink_set(pl->supported, 40000baseLR4_Full); 956 phylink_set(pl->supported, 50000baseCR2_Full); 957 phylink_set(pl->supported, 50000baseKR2_Full); 958 phylink_set(pl->supported, 50000baseSR2_Full); 959 phylink_set(pl->supported, 50000baseKR_Full); 960 phylink_set(pl->supported, 50000baseSR_Full); 961 phylink_set(pl->supported, 50000baseCR_Full); 962 phylink_set(pl->supported, 50000baseLR_ER_FR_Full); 963 phylink_set(pl->supported, 50000baseDR_Full); 964 phylink_set(pl->supported, 100000baseKR4_Full); 965 phylink_set(pl->supported, 100000baseSR4_Full); 966 phylink_set(pl->supported, 100000baseCR4_Full); 967 phylink_set(pl->supported, 100000baseLR4_ER4_Full); 968 phylink_set(pl->supported, 100000baseKR2_Full); 969 phylink_set(pl->supported, 100000baseSR2_Full); 970 phylink_set(pl->supported, 100000baseCR2_Full); 971 phylink_set(pl->supported, 100000baseLR2_ER2_FR2_Full); 972 phylink_set(pl->supported, 100000baseDR2_Full); 973 break; 974 975 default: 976 phylink_err(pl, 977 "incorrect link mode %s for in-band status\n", 978 phy_modes(pl->link_config.interface)); 979 return -EINVAL; 980 } 981 982 linkmode_copy(pl->link_config.advertising, pl->supported); 983 984 if (phylink_validate(pl, pl->supported, &pl->link_config)) { 985 phylink_err(pl, 986 "failed to validate link configuration for in-band status\n"); 987 return -EINVAL; 988 } 989 } 990 991 return 0; 992 } 993 994 static void phylink_apply_manual_flow(struct phylink *pl, 995 struct phylink_link_state *state) 996 { 997 /* If autoneg is disabled, pause AN is also disabled */ 998 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 999 state->advertising)) 1000 state->pause &= ~MLO_PAUSE_AN; 1001 1002 /* Manual configuration of pause modes */ 1003 if (!(pl->link_config.pause & MLO_PAUSE_AN)) 1004 state->pause = pl->link_config.pause; 1005 } 1006 1007 static void phylink_resolve_an_pause(struct phylink_link_state *state) 1008 { 1009 bool tx_pause, rx_pause; 1010 1011 if (state->duplex == DUPLEX_FULL) { 1012 linkmode_resolve_pause(state->advertising, 1013 state->lp_advertising, 1014 &tx_pause, &rx_pause); 1015 if (tx_pause) 1016 state->pause |= MLO_PAUSE_TX; 1017 if (rx_pause) 1018 state->pause |= MLO_PAUSE_RX; 1019 } 1020 } 1021 1022 static void phylink_pcs_pre_config(struct phylink_pcs *pcs, 1023 phy_interface_t interface) 1024 { 1025 if (pcs && pcs->ops->pcs_pre_config) 1026 pcs->ops->pcs_pre_config(pcs, interface); 1027 } 1028 1029 static int phylink_pcs_post_config(struct phylink_pcs *pcs, 1030 phy_interface_t interface) 1031 { 1032 int err = 0; 1033 1034 if (pcs && pcs->ops->pcs_post_config) 1035 err = pcs->ops->pcs_post_config(pcs, interface); 1036 1037 return err; 1038 } 1039 1040 static void phylink_pcs_disable(struct phylink_pcs *pcs) 1041 { 1042 if (pcs && pcs->ops->pcs_disable) 1043 pcs->ops->pcs_disable(pcs); 1044 } 1045 1046 static int phylink_pcs_enable(struct phylink_pcs *pcs) 1047 { 1048 int err = 0; 1049 1050 if (pcs && pcs->ops->pcs_enable) 1051 err = pcs->ops->pcs_enable(pcs); 1052 1053 return err; 1054 } 1055 1056 static int phylink_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode, 1057 const struct phylink_link_state *state, 1058 bool permit_pause_to_mac) 1059 { 1060 if (!pcs) 1061 return 0; 1062 1063 return pcs->ops->pcs_config(pcs, neg_mode, state->interface, 1064 state->advertising, permit_pause_to_mac); 1065 } 1066 1067 static void phylink_pcs_link_up(struct phylink_pcs *pcs, unsigned int neg_mode, 1068 phy_interface_t interface, int speed, 1069 int duplex) 1070 { 1071 if (pcs && pcs->ops->pcs_link_up) 1072 pcs->ops->pcs_link_up(pcs, neg_mode, interface, speed, duplex); 1073 } 1074 1075 static void phylink_pcs_poll_stop(struct phylink *pl) 1076 { 1077 if (pl->cfg_link_an_mode == MLO_AN_INBAND) 1078 del_timer(&pl->link_poll); 1079 } 1080 1081 static void phylink_pcs_poll_start(struct phylink *pl) 1082 { 1083 if (pl->pcs && pl->pcs->poll && pl->cfg_link_an_mode == MLO_AN_INBAND) 1084 mod_timer(&pl->link_poll, jiffies + HZ); 1085 } 1086 1087 static void phylink_mac_config(struct phylink *pl, 1088 const struct phylink_link_state *state) 1089 { 1090 struct phylink_link_state st = *state; 1091 1092 /* Stop drivers incorrectly using these */ 1093 linkmode_zero(st.lp_advertising); 1094 st.speed = SPEED_UNKNOWN; 1095 st.duplex = DUPLEX_UNKNOWN; 1096 st.an_complete = false; 1097 st.link = false; 1098 1099 phylink_dbg(pl, 1100 "%s: mode=%s/%s/%s adv=%*pb pause=%02x\n", 1101 __func__, phylink_an_mode_str(pl->cur_link_an_mode), 1102 phy_modes(st.interface), 1103 phy_rate_matching_to_str(st.rate_matching), 1104 __ETHTOOL_LINK_MODE_MASK_NBITS, st.advertising, 1105 st.pause); 1106 1107 pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, &st); 1108 } 1109 1110 static void phylink_pcs_an_restart(struct phylink *pl) 1111 { 1112 if (pl->pcs && linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 1113 pl->link_config.advertising) && 1114 phy_interface_mode_is_8023z(pl->link_config.interface) && 1115 phylink_autoneg_inband(pl->cur_link_an_mode)) 1116 pl->pcs->ops->pcs_an_restart(pl->pcs); 1117 } 1118 1119 static void phylink_major_config(struct phylink *pl, bool restart, 1120 const struct phylink_link_state *state) 1121 { 1122 struct phylink_pcs *pcs = NULL; 1123 bool pcs_changed = false; 1124 unsigned int rate_kbd; 1125 unsigned int neg_mode; 1126 int err; 1127 1128 phylink_dbg(pl, "major config %s\n", phy_modes(state->interface)); 1129 1130 pl->pcs_neg_mode = phylink_pcs_neg_mode(pl->cur_link_an_mode, 1131 state->interface, 1132 state->advertising); 1133 1134 if (pl->using_mac_select_pcs) { 1135 pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface); 1136 if (IS_ERR(pcs)) { 1137 phylink_err(pl, 1138 "mac_select_pcs unexpectedly failed: %pe\n", 1139 pcs); 1140 return; 1141 } 1142 1143 pcs_changed = pcs && pl->pcs != pcs; 1144 } 1145 1146 phylink_pcs_poll_stop(pl); 1147 1148 if (pl->mac_ops->mac_prepare) { 1149 err = pl->mac_ops->mac_prepare(pl->config, pl->cur_link_an_mode, 1150 state->interface); 1151 if (err < 0) { 1152 phylink_err(pl, "mac_prepare failed: %pe\n", 1153 ERR_PTR(err)); 1154 return; 1155 } 1156 } 1157 1158 /* If we have a new PCS, switch to the new PCS after preparing the MAC 1159 * for the change. 1160 */ 1161 if (pcs_changed) { 1162 phylink_pcs_disable(pl->pcs); 1163 1164 if (pl->pcs) 1165 pl->pcs->phylink = NULL; 1166 1167 pcs->phylink = pl; 1168 1169 pl->pcs = pcs; 1170 } 1171 1172 if (pl->pcs) 1173 phylink_pcs_pre_config(pl->pcs, state->interface); 1174 1175 phylink_mac_config(pl, state); 1176 1177 if (pl->pcs) 1178 phylink_pcs_post_config(pl->pcs, state->interface); 1179 1180 if (pl->pcs_state == PCS_STATE_STARTING || pcs_changed) 1181 phylink_pcs_enable(pl->pcs); 1182 1183 neg_mode = pl->cur_link_an_mode; 1184 if (pl->pcs && pl->pcs->neg_mode) 1185 neg_mode = pl->pcs_neg_mode; 1186 1187 err = phylink_pcs_config(pl->pcs, neg_mode, state, 1188 !!(pl->link_config.pause & MLO_PAUSE_AN)); 1189 if (err < 0) 1190 phylink_err(pl, "pcs_config failed: %pe\n", 1191 ERR_PTR(err)); 1192 else if (err > 0) 1193 restart = true; 1194 1195 if (restart) 1196 phylink_pcs_an_restart(pl); 1197 1198 if (pl->mac_ops->mac_finish) { 1199 err = pl->mac_ops->mac_finish(pl->config, pl->cur_link_an_mode, 1200 state->interface); 1201 if (err < 0) 1202 phylink_err(pl, "mac_finish failed: %pe\n", 1203 ERR_PTR(err)); 1204 } 1205 1206 if (pl->sfp_bus) { 1207 rate_kbd = phylink_interface_signal_rate(state->interface); 1208 if (rate_kbd) 1209 sfp_upstream_set_signal_rate(pl->sfp_bus, rate_kbd); 1210 } 1211 1212 phylink_pcs_poll_start(pl); 1213 } 1214 1215 /* 1216 * Reconfigure for a change of inband advertisement. 1217 * If we have a separate PCS, we only need to call its pcs_config() method, 1218 * and then restart AN if it indicates something changed. Otherwise, we do 1219 * the full MAC reconfiguration. 1220 */ 1221 static int phylink_change_inband_advert(struct phylink *pl) 1222 { 1223 unsigned int neg_mode; 1224 int ret; 1225 1226 if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) 1227 return 0; 1228 1229 phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__, 1230 phylink_an_mode_str(pl->cur_link_an_mode), 1231 phy_modes(pl->link_config.interface), 1232 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->link_config.advertising, 1233 pl->link_config.pause); 1234 1235 /* Recompute the PCS neg mode */ 1236 pl->pcs_neg_mode = phylink_pcs_neg_mode(pl->cur_link_an_mode, 1237 pl->link_config.interface, 1238 pl->link_config.advertising); 1239 1240 neg_mode = pl->cur_link_an_mode; 1241 if (pl->pcs->neg_mode) 1242 neg_mode = pl->pcs_neg_mode; 1243 1244 /* Modern PCS-based method; update the advert at the PCS, and 1245 * restart negotiation if the pcs_config() helper indicates that 1246 * the programmed advertisement has changed. 1247 */ 1248 ret = phylink_pcs_config(pl->pcs, neg_mode, &pl->link_config, 1249 !!(pl->link_config.pause & MLO_PAUSE_AN)); 1250 if (ret < 0) 1251 return ret; 1252 1253 if (ret > 0) 1254 phylink_pcs_an_restart(pl); 1255 1256 return 0; 1257 } 1258 1259 static void phylink_mac_pcs_get_state(struct phylink *pl, 1260 struct phylink_link_state *state) 1261 { 1262 linkmode_copy(state->advertising, pl->link_config.advertising); 1263 linkmode_zero(state->lp_advertising); 1264 state->interface = pl->link_config.interface; 1265 state->rate_matching = pl->link_config.rate_matching; 1266 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 1267 state->advertising)) { 1268 state->speed = SPEED_UNKNOWN; 1269 state->duplex = DUPLEX_UNKNOWN; 1270 state->pause = MLO_PAUSE_NONE; 1271 } else { 1272 state->speed = pl->link_config.speed; 1273 state->duplex = pl->link_config.duplex; 1274 state->pause = pl->link_config.pause; 1275 } 1276 state->an_complete = 0; 1277 state->link = 1; 1278 1279 if (pl->pcs) 1280 pl->pcs->ops->pcs_get_state(pl->pcs, state); 1281 else 1282 state->link = 0; 1283 } 1284 1285 /* The fixed state is... fixed except for the link state, 1286 * which may be determined by a GPIO or a callback. 1287 */ 1288 static void phylink_get_fixed_state(struct phylink *pl, 1289 struct phylink_link_state *state) 1290 { 1291 *state = pl->link_config; 1292 if (pl->config->get_fixed_state) 1293 pl->config->get_fixed_state(pl->config, state); 1294 else if (pl->link_gpio) 1295 state->link = !!gpiod_get_value_cansleep(pl->link_gpio); 1296 1297 state->pause = MLO_PAUSE_NONE; 1298 phylink_resolve_an_pause(state); 1299 } 1300 1301 static void phylink_mac_initial_config(struct phylink *pl, bool force_restart) 1302 { 1303 struct phylink_link_state link_state; 1304 1305 switch (pl->cur_link_an_mode) { 1306 case MLO_AN_PHY: 1307 link_state = pl->phy_state; 1308 break; 1309 1310 case MLO_AN_FIXED: 1311 phylink_get_fixed_state(pl, &link_state); 1312 break; 1313 1314 case MLO_AN_INBAND: 1315 link_state = pl->link_config; 1316 if (link_state.interface == PHY_INTERFACE_MODE_SGMII) 1317 link_state.pause = MLO_PAUSE_NONE; 1318 break; 1319 1320 default: /* can't happen */ 1321 return; 1322 } 1323 1324 link_state.link = false; 1325 1326 phylink_apply_manual_flow(pl, &link_state); 1327 phylink_major_config(pl, force_restart, &link_state); 1328 } 1329 1330 static const char *phylink_pause_to_str(int pause) 1331 { 1332 switch (pause & MLO_PAUSE_TXRX_MASK) { 1333 case MLO_PAUSE_TX | MLO_PAUSE_RX: 1334 return "rx/tx"; 1335 case MLO_PAUSE_TX: 1336 return "tx"; 1337 case MLO_PAUSE_RX: 1338 return "rx"; 1339 default: 1340 return "off"; 1341 } 1342 } 1343 1344 static void phylink_link_up(struct phylink *pl, 1345 struct phylink_link_state link_state) 1346 { 1347 struct net_device *ndev = pl->netdev; 1348 unsigned int neg_mode; 1349 int speed, duplex; 1350 bool rx_pause; 1351 1352 speed = link_state.speed; 1353 duplex = link_state.duplex; 1354 rx_pause = !!(link_state.pause & MLO_PAUSE_RX); 1355 1356 switch (link_state.rate_matching) { 1357 case RATE_MATCH_PAUSE: 1358 /* The PHY is doing rate matchion from the media rate (in 1359 * the link_state) to the interface speed, and will send 1360 * pause frames to the MAC to limit its transmission speed. 1361 */ 1362 speed = phylink_interface_max_speed(link_state.interface); 1363 duplex = DUPLEX_FULL; 1364 rx_pause = true; 1365 break; 1366 1367 case RATE_MATCH_CRS: 1368 /* The PHY is doing rate matchion from the media rate (in 1369 * the link_state) to the interface speed, and will cause 1370 * collisions to the MAC to limit its transmission speed. 1371 */ 1372 speed = phylink_interface_max_speed(link_state.interface); 1373 duplex = DUPLEX_HALF; 1374 break; 1375 } 1376 1377 pl->cur_interface = link_state.interface; 1378 1379 neg_mode = pl->cur_link_an_mode; 1380 if (pl->pcs && pl->pcs->neg_mode) 1381 neg_mode = pl->pcs_neg_mode; 1382 1383 phylink_pcs_link_up(pl->pcs, neg_mode, pl->cur_interface, speed, 1384 duplex); 1385 1386 pl->mac_ops->mac_link_up(pl->config, pl->phydev, pl->cur_link_an_mode, 1387 pl->cur_interface, speed, duplex, 1388 !!(link_state.pause & MLO_PAUSE_TX), rx_pause); 1389 1390 if (ndev) 1391 netif_carrier_on(ndev); 1392 1393 phylink_info(pl, 1394 "Link is Up - %s/%s - flow control %s\n", 1395 phy_speed_to_str(link_state.speed), 1396 phy_duplex_to_str(link_state.duplex), 1397 phylink_pause_to_str(link_state.pause)); 1398 } 1399 1400 static void phylink_link_down(struct phylink *pl) 1401 { 1402 struct net_device *ndev = pl->netdev; 1403 1404 if (ndev) 1405 netif_carrier_off(ndev); 1406 pl->mac_ops->mac_link_down(pl->config, pl->cur_link_an_mode, 1407 pl->cur_interface); 1408 phylink_info(pl, "Link is Down\n"); 1409 } 1410 1411 static void phylink_resolve(struct work_struct *w) 1412 { 1413 struct phylink *pl = container_of(w, struct phylink, resolve); 1414 struct phylink_link_state link_state; 1415 struct net_device *ndev = pl->netdev; 1416 bool mac_config = false; 1417 bool retrigger = false; 1418 bool cur_link_state; 1419 1420 mutex_lock(&pl->state_mutex); 1421 if (pl->netdev) 1422 cur_link_state = netif_carrier_ok(ndev); 1423 else 1424 cur_link_state = pl->old_link_state; 1425 1426 if (pl->phylink_disable_state) { 1427 pl->mac_link_dropped = false; 1428 link_state.link = false; 1429 } else if (pl->mac_link_dropped) { 1430 link_state.link = false; 1431 retrigger = true; 1432 } else { 1433 switch (pl->cur_link_an_mode) { 1434 case MLO_AN_PHY: 1435 link_state = pl->phy_state; 1436 phylink_apply_manual_flow(pl, &link_state); 1437 mac_config = link_state.link; 1438 break; 1439 1440 case MLO_AN_FIXED: 1441 phylink_get_fixed_state(pl, &link_state); 1442 mac_config = link_state.link; 1443 break; 1444 1445 case MLO_AN_INBAND: 1446 phylink_mac_pcs_get_state(pl, &link_state); 1447 1448 /* The PCS may have a latching link-fail indicator. 1449 * If the link was up, bring the link down and 1450 * re-trigger the resolve. Otherwise, re-read the 1451 * PCS state to get the current status of the link. 1452 */ 1453 if (!link_state.link) { 1454 if (cur_link_state) 1455 retrigger = true; 1456 else 1457 phylink_mac_pcs_get_state(pl, 1458 &link_state); 1459 } 1460 1461 /* If we have a phy, the "up" state is the union of 1462 * both the PHY and the MAC 1463 */ 1464 if (pl->phydev) 1465 link_state.link &= pl->phy_state.link; 1466 1467 /* Only update if the PHY link is up */ 1468 if (pl->phydev && pl->phy_state.link) { 1469 /* If the interface has changed, force a 1470 * link down event if the link isn't already 1471 * down, and re-resolve. 1472 */ 1473 if (link_state.interface != 1474 pl->phy_state.interface) { 1475 retrigger = true; 1476 link_state.link = false; 1477 } 1478 link_state.interface = pl->phy_state.interface; 1479 1480 /* If we are doing rate matching, then the 1481 * link speed/duplex comes from the PHY 1482 */ 1483 if (pl->phy_state.rate_matching) { 1484 link_state.rate_matching = 1485 pl->phy_state.rate_matching; 1486 link_state.speed = pl->phy_state.speed; 1487 link_state.duplex = 1488 pl->phy_state.duplex; 1489 } 1490 1491 /* If we have a PHY, we need to update with 1492 * the PHY flow control bits. 1493 */ 1494 link_state.pause = pl->phy_state.pause; 1495 mac_config = true; 1496 } 1497 phylink_apply_manual_flow(pl, &link_state); 1498 break; 1499 } 1500 } 1501 1502 if (mac_config) { 1503 if (link_state.interface != pl->link_config.interface) { 1504 /* The interface has changed, force the link down and 1505 * then reconfigure. 1506 */ 1507 if (cur_link_state) { 1508 phylink_link_down(pl); 1509 cur_link_state = false; 1510 } 1511 phylink_major_config(pl, false, &link_state); 1512 pl->link_config.interface = link_state.interface; 1513 } 1514 } 1515 1516 if (link_state.link != cur_link_state) { 1517 pl->old_link_state = link_state.link; 1518 if (!link_state.link) 1519 phylink_link_down(pl); 1520 else 1521 phylink_link_up(pl, link_state); 1522 } 1523 if (!link_state.link && retrigger) { 1524 pl->mac_link_dropped = false; 1525 queue_work(system_power_efficient_wq, &pl->resolve); 1526 } 1527 mutex_unlock(&pl->state_mutex); 1528 } 1529 1530 static void phylink_run_resolve(struct phylink *pl) 1531 { 1532 if (!pl->phylink_disable_state) 1533 queue_work(system_power_efficient_wq, &pl->resolve); 1534 } 1535 1536 static void phylink_run_resolve_and_disable(struct phylink *pl, int bit) 1537 { 1538 unsigned long state = pl->phylink_disable_state; 1539 1540 set_bit(bit, &pl->phylink_disable_state); 1541 if (state == 0) { 1542 queue_work(system_power_efficient_wq, &pl->resolve); 1543 flush_work(&pl->resolve); 1544 } 1545 } 1546 1547 static void phylink_enable_and_run_resolve(struct phylink *pl, int bit) 1548 { 1549 clear_bit(bit, &pl->phylink_disable_state); 1550 phylink_run_resolve(pl); 1551 } 1552 1553 static void phylink_fixed_poll(struct timer_list *t) 1554 { 1555 struct phylink *pl = container_of(t, struct phylink, link_poll); 1556 1557 mod_timer(t, jiffies + HZ); 1558 1559 phylink_run_resolve(pl); 1560 } 1561 1562 static const struct sfp_upstream_ops sfp_phylink_ops; 1563 1564 static int phylink_register_sfp(struct phylink *pl, 1565 const struct fwnode_handle *fwnode) 1566 { 1567 struct sfp_bus *bus; 1568 int ret; 1569 1570 if (!fwnode) 1571 return 0; 1572 1573 bus = sfp_bus_find_fwnode(fwnode); 1574 if (IS_ERR(bus)) { 1575 phylink_err(pl, "unable to attach SFP bus: %pe\n", bus); 1576 return PTR_ERR(bus); 1577 } 1578 1579 pl->sfp_bus = bus; 1580 1581 ret = sfp_bus_add_upstream(bus, pl, &sfp_phylink_ops); 1582 sfp_bus_put(bus); 1583 1584 return ret; 1585 } 1586 1587 /** 1588 * phylink_create() - create a phylink instance 1589 * @config: a pointer to the target &struct phylink_config 1590 * @fwnode: a pointer to a &struct fwnode_handle describing the network 1591 * interface 1592 * @iface: the desired link mode defined by &typedef phy_interface_t 1593 * @mac_ops: a pointer to a &struct phylink_mac_ops for the MAC. 1594 * 1595 * Create a new phylink instance, and parse the link parameters found in @np. 1596 * This will parse in-band modes, fixed-link or SFP configuration. 1597 * 1598 * Note: the rtnl lock must not be held when calling this function. 1599 * 1600 * Returns a pointer to a &struct phylink, or an error-pointer value. Users 1601 * must use IS_ERR() to check for errors from this function. 1602 */ 1603 struct phylink *phylink_create(struct phylink_config *config, 1604 const struct fwnode_handle *fwnode, 1605 phy_interface_t iface, 1606 const struct phylink_mac_ops *mac_ops) 1607 { 1608 bool using_mac_select_pcs = false; 1609 struct phylink *pl; 1610 int ret; 1611 1612 /* Validate the supplied configuration */ 1613 if (phy_interface_empty(config->supported_interfaces)) { 1614 dev_err(config->dev, 1615 "phylink: error: empty supported_interfaces\n"); 1616 return ERR_PTR(-EINVAL); 1617 } 1618 1619 if (mac_ops->mac_select_pcs && 1620 mac_ops->mac_select_pcs(config, PHY_INTERFACE_MODE_NA) != 1621 ERR_PTR(-EOPNOTSUPP)) 1622 using_mac_select_pcs = true; 1623 1624 pl = kzalloc(sizeof(*pl), GFP_KERNEL); 1625 if (!pl) 1626 return ERR_PTR(-ENOMEM); 1627 1628 mutex_init(&pl->state_mutex); 1629 INIT_WORK(&pl->resolve, phylink_resolve); 1630 1631 pl->config = config; 1632 if (config->type == PHYLINK_NETDEV) { 1633 pl->netdev = to_net_dev(config->dev); 1634 netif_carrier_off(pl->netdev); 1635 } else if (config->type == PHYLINK_DEV) { 1636 pl->dev = config->dev; 1637 } else { 1638 kfree(pl); 1639 return ERR_PTR(-EINVAL); 1640 } 1641 1642 pl->using_mac_select_pcs = using_mac_select_pcs; 1643 pl->phy_state.interface = iface; 1644 pl->link_interface = iface; 1645 if (iface == PHY_INTERFACE_MODE_MOCA) 1646 pl->link_port = PORT_BNC; 1647 else 1648 pl->link_port = PORT_MII; 1649 pl->link_config.interface = iface; 1650 pl->link_config.pause = MLO_PAUSE_AN; 1651 pl->link_config.speed = SPEED_UNKNOWN; 1652 pl->link_config.duplex = DUPLEX_UNKNOWN; 1653 pl->pcs_state = PCS_STATE_DOWN; 1654 pl->mac_ops = mac_ops; 1655 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 1656 timer_setup(&pl->link_poll, phylink_fixed_poll, 0); 1657 1658 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 1659 linkmode_copy(pl->link_config.advertising, pl->supported); 1660 phylink_validate(pl, pl->supported, &pl->link_config); 1661 1662 ret = phylink_parse_mode(pl, fwnode); 1663 if (ret < 0) { 1664 kfree(pl); 1665 return ERR_PTR(ret); 1666 } 1667 1668 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 1669 ret = phylink_parse_fixedlink(pl, fwnode); 1670 if (ret < 0) { 1671 kfree(pl); 1672 return ERR_PTR(ret); 1673 } 1674 } 1675 1676 pl->cur_link_an_mode = pl->cfg_link_an_mode; 1677 1678 ret = phylink_register_sfp(pl, fwnode); 1679 if (ret < 0) { 1680 kfree(pl); 1681 return ERR_PTR(ret); 1682 } 1683 1684 return pl; 1685 } 1686 EXPORT_SYMBOL_GPL(phylink_create); 1687 1688 /** 1689 * phylink_destroy() - cleanup and destroy the phylink instance 1690 * @pl: a pointer to a &struct phylink returned from phylink_create() 1691 * 1692 * Destroy a phylink instance. Any PHY that has been attached must have been 1693 * cleaned up via phylink_disconnect_phy() prior to calling this function. 1694 * 1695 * Note: the rtnl lock must not be held when calling this function. 1696 */ 1697 void phylink_destroy(struct phylink *pl) 1698 { 1699 sfp_bus_del_upstream(pl->sfp_bus); 1700 if (pl->link_gpio) 1701 gpiod_put(pl->link_gpio); 1702 1703 cancel_work_sync(&pl->resolve); 1704 kfree(pl); 1705 } 1706 EXPORT_SYMBOL_GPL(phylink_destroy); 1707 1708 /** 1709 * phylink_expects_phy() - Determine if phylink expects a phy to be attached 1710 * @pl: a pointer to a &struct phylink returned from phylink_create() 1711 * 1712 * When using fixed-link mode, or in-band mode with 1000base-X or 2500base-X, 1713 * no PHY is needed. 1714 * 1715 * Returns true if phylink will be expecting a PHY. 1716 */ 1717 bool phylink_expects_phy(struct phylink *pl) 1718 { 1719 if (pl->cfg_link_an_mode == MLO_AN_FIXED || 1720 (pl->cfg_link_an_mode == MLO_AN_INBAND && 1721 phy_interface_mode_is_8023z(pl->link_config.interface))) 1722 return false; 1723 return true; 1724 } 1725 EXPORT_SYMBOL_GPL(phylink_expects_phy); 1726 1727 static void phylink_phy_change(struct phy_device *phydev, bool up) 1728 { 1729 struct phylink *pl = phydev->phylink; 1730 bool tx_pause, rx_pause; 1731 1732 phy_get_pause(phydev, &tx_pause, &rx_pause); 1733 1734 mutex_lock(&pl->state_mutex); 1735 pl->phy_state.speed = phydev->speed; 1736 pl->phy_state.duplex = phydev->duplex; 1737 pl->phy_state.rate_matching = phydev->rate_matching; 1738 pl->phy_state.pause = MLO_PAUSE_NONE; 1739 if (tx_pause) 1740 pl->phy_state.pause |= MLO_PAUSE_TX; 1741 if (rx_pause) 1742 pl->phy_state.pause |= MLO_PAUSE_RX; 1743 pl->phy_state.interface = phydev->interface; 1744 pl->phy_state.link = up; 1745 mutex_unlock(&pl->state_mutex); 1746 1747 phylink_run_resolve(pl); 1748 1749 phylink_dbg(pl, "phy link %s %s/%s/%s/%s/%s\n", up ? "up" : "down", 1750 phy_modes(phydev->interface), 1751 phy_speed_to_str(phydev->speed), 1752 phy_duplex_to_str(phydev->duplex), 1753 phy_rate_matching_to_str(phydev->rate_matching), 1754 phylink_pause_to_str(pl->phy_state.pause)); 1755 } 1756 1757 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy, 1758 phy_interface_t interface) 1759 { 1760 struct phylink_link_state config; 1761 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 1762 char *irq_str; 1763 int ret; 1764 1765 /* 1766 * This is the new way of dealing with flow control for PHYs, 1767 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 1768 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 1769 * using our validate call to the MAC, we rely upon the MAC 1770 * clearing the bits from both supported and advertising fields. 1771 */ 1772 phy_support_asym_pause(phy); 1773 1774 memset(&config, 0, sizeof(config)); 1775 linkmode_copy(supported, phy->supported); 1776 linkmode_copy(config.advertising, phy->advertising); 1777 1778 /* Check whether we would use rate matching for the proposed interface 1779 * mode. 1780 */ 1781 config.rate_matching = phy_get_rate_matching(phy, interface); 1782 1783 /* Clause 45 PHYs may switch their Serdes lane between, e.g. 10GBASE-R, 1784 * 5GBASE-R, 2500BASE-X and SGMII if they are not using rate matching. 1785 * For some interface modes (e.g. RXAUI, XAUI and USXGMII) switching 1786 * their Serdes is either unnecessary or not reasonable. 1787 * 1788 * For these which switch interface modes, we really need to know which 1789 * interface modes the PHY supports to properly work out which ethtool 1790 * linkmodes can be supported. For now, as a work-around, we validate 1791 * against all interface modes, which may lead to more ethtool link 1792 * modes being advertised than are actually supported. 1793 */ 1794 if (phy->is_c45 && config.rate_matching == RATE_MATCH_NONE && 1795 interface != PHY_INTERFACE_MODE_RXAUI && 1796 interface != PHY_INTERFACE_MODE_XAUI && 1797 interface != PHY_INTERFACE_MODE_USXGMII) 1798 config.interface = PHY_INTERFACE_MODE_NA; 1799 else 1800 config.interface = interface; 1801 1802 ret = phylink_validate(pl, supported, &config); 1803 if (ret) { 1804 phylink_warn(pl, "validation of %s with support %*pb and advertisement %*pb failed: %pe\n", 1805 phy_modes(config.interface), 1806 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->supported, 1807 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising, 1808 ERR_PTR(ret)); 1809 return ret; 1810 } 1811 1812 phy->phylink = pl; 1813 phy->phy_link_change = phylink_phy_change; 1814 1815 irq_str = phy_attached_info_irq(phy); 1816 phylink_info(pl, 1817 "PHY [%s] driver [%s] (irq=%s)\n", 1818 dev_name(&phy->mdio.dev), phy->drv->name, irq_str); 1819 kfree(irq_str); 1820 1821 mutex_lock(&phy->lock); 1822 mutex_lock(&pl->state_mutex); 1823 pl->phydev = phy; 1824 pl->phy_state.interface = interface; 1825 pl->phy_state.pause = MLO_PAUSE_NONE; 1826 pl->phy_state.speed = SPEED_UNKNOWN; 1827 pl->phy_state.duplex = DUPLEX_UNKNOWN; 1828 pl->phy_state.rate_matching = RATE_MATCH_NONE; 1829 linkmode_copy(pl->supported, supported); 1830 linkmode_copy(pl->link_config.advertising, config.advertising); 1831 1832 /* Restrict the phy advertisement according to the MAC support. */ 1833 linkmode_copy(phy->advertising, config.advertising); 1834 mutex_unlock(&pl->state_mutex); 1835 mutex_unlock(&phy->lock); 1836 1837 phylink_dbg(pl, 1838 "phy: %s setting supported %*pb advertising %*pb\n", 1839 phy_modes(interface), 1840 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported, 1841 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising); 1842 1843 if (phy_interrupt_is_valid(phy)) 1844 phy_request_interrupt(phy); 1845 1846 if (pl->config->mac_managed_pm) 1847 phy->mac_managed_pm = true; 1848 1849 return 0; 1850 } 1851 1852 static int phylink_attach_phy(struct phylink *pl, struct phy_device *phy, 1853 phy_interface_t interface) 1854 { 1855 if (WARN_ON(pl->cfg_link_an_mode == MLO_AN_FIXED || 1856 (pl->cfg_link_an_mode == MLO_AN_INBAND && 1857 phy_interface_mode_is_8023z(interface) && !pl->sfp_bus))) 1858 return -EINVAL; 1859 1860 if (pl->phydev) 1861 return -EBUSY; 1862 1863 return phy_attach_direct(pl->netdev, phy, 0, interface); 1864 } 1865 1866 /** 1867 * phylink_connect_phy() - connect a PHY to the phylink instance 1868 * @pl: a pointer to a &struct phylink returned from phylink_create() 1869 * @phy: a pointer to a &struct phy_device. 1870 * 1871 * Connect @phy to the phylink instance specified by @pl by calling 1872 * phy_attach_direct(). Configure the @phy according to the MAC driver's 1873 * capabilities, start the PHYLIB state machine and enable any interrupts 1874 * that the PHY supports. 1875 * 1876 * This updates the phylink's ethtool supported and advertising link mode 1877 * masks. 1878 * 1879 * Returns 0 on success or a negative errno. 1880 */ 1881 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy) 1882 { 1883 int ret; 1884 1885 /* Use PHY device/driver interface */ 1886 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 1887 pl->link_interface = phy->interface; 1888 pl->link_config.interface = pl->link_interface; 1889 } 1890 1891 ret = phylink_attach_phy(pl, phy, pl->link_interface); 1892 if (ret < 0) 1893 return ret; 1894 1895 ret = phylink_bringup_phy(pl, phy, pl->link_config.interface); 1896 if (ret) 1897 phy_detach(phy); 1898 1899 return ret; 1900 } 1901 EXPORT_SYMBOL_GPL(phylink_connect_phy); 1902 1903 /** 1904 * phylink_of_phy_connect() - connect the PHY specified in the DT mode. 1905 * @pl: a pointer to a &struct phylink returned from phylink_create() 1906 * @dn: a pointer to a &struct device_node. 1907 * @flags: PHY-specific flags to communicate to the PHY device driver 1908 * 1909 * Connect the phy specified in the device node @dn to the phylink instance 1910 * specified by @pl. Actions specified in phylink_connect_phy() will be 1911 * performed. 1912 * 1913 * Returns 0 on success or a negative errno. 1914 */ 1915 int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn, 1916 u32 flags) 1917 { 1918 return phylink_fwnode_phy_connect(pl, of_fwnode_handle(dn), flags); 1919 } 1920 EXPORT_SYMBOL_GPL(phylink_of_phy_connect); 1921 1922 /** 1923 * phylink_fwnode_phy_connect() - connect the PHY specified in the fwnode. 1924 * @pl: a pointer to a &struct phylink returned from phylink_create() 1925 * @fwnode: a pointer to a &struct fwnode_handle. 1926 * @flags: PHY-specific flags to communicate to the PHY device driver 1927 * 1928 * Connect the phy specified @fwnode to the phylink instance specified 1929 * by @pl. 1930 * 1931 * Returns 0 on success or a negative errno. 1932 */ 1933 int phylink_fwnode_phy_connect(struct phylink *pl, 1934 const struct fwnode_handle *fwnode, 1935 u32 flags) 1936 { 1937 struct fwnode_handle *phy_fwnode; 1938 struct phy_device *phy_dev; 1939 int ret; 1940 1941 /* Fixed links and 802.3z are handled without needing a PHY */ 1942 if (pl->cfg_link_an_mode == MLO_AN_FIXED || 1943 (pl->cfg_link_an_mode == MLO_AN_INBAND && 1944 phy_interface_mode_is_8023z(pl->link_interface))) 1945 return 0; 1946 1947 phy_fwnode = fwnode_get_phy_node(fwnode); 1948 if (IS_ERR(phy_fwnode)) { 1949 if (pl->cfg_link_an_mode == MLO_AN_PHY) 1950 return -ENODEV; 1951 return 0; 1952 } 1953 1954 phy_dev = fwnode_phy_find_device(phy_fwnode); 1955 /* We're done with the phy_node handle */ 1956 fwnode_handle_put(phy_fwnode); 1957 if (!phy_dev) 1958 return -ENODEV; 1959 1960 /* Use PHY device/driver interface */ 1961 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 1962 pl->link_interface = phy_dev->interface; 1963 pl->link_config.interface = pl->link_interface; 1964 } 1965 1966 ret = phy_attach_direct(pl->netdev, phy_dev, flags, 1967 pl->link_interface); 1968 phy_device_free(phy_dev); 1969 if (ret) 1970 return ret; 1971 1972 ret = phylink_bringup_phy(pl, phy_dev, pl->link_config.interface); 1973 if (ret) 1974 phy_detach(phy_dev); 1975 1976 return ret; 1977 } 1978 EXPORT_SYMBOL_GPL(phylink_fwnode_phy_connect); 1979 1980 /** 1981 * phylink_disconnect_phy() - disconnect any PHY attached to the phylink 1982 * instance. 1983 * @pl: a pointer to a &struct phylink returned from phylink_create() 1984 * 1985 * Disconnect any current PHY from the phylink instance described by @pl. 1986 */ 1987 void phylink_disconnect_phy(struct phylink *pl) 1988 { 1989 struct phy_device *phy; 1990 1991 ASSERT_RTNL(); 1992 1993 phy = pl->phydev; 1994 if (phy) { 1995 mutex_lock(&phy->lock); 1996 mutex_lock(&pl->state_mutex); 1997 pl->phydev = NULL; 1998 mutex_unlock(&pl->state_mutex); 1999 mutex_unlock(&phy->lock); 2000 flush_work(&pl->resolve); 2001 2002 phy_disconnect(phy); 2003 } 2004 } 2005 EXPORT_SYMBOL_GPL(phylink_disconnect_phy); 2006 2007 static void phylink_link_changed(struct phylink *pl, bool up, const char *what) 2008 { 2009 if (!up) 2010 pl->mac_link_dropped = true; 2011 phylink_run_resolve(pl); 2012 phylink_dbg(pl, "%s link %s\n", what, up ? "up" : "down"); 2013 } 2014 2015 /** 2016 * phylink_mac_change() - notify phylink of a change in MAC state 2017 * @pl: a pointer to a &struct phylink returned from phylink_create() 2018 * @up: indicates whether the link is currently up. 2019 * 2020 * The MAC driver should call this driver when the state of its link 2021 * changes (eg, link failure, new negotiation results, etc.) 2022 */ 2023 void phylink_mac_change(struct phylink *pl, bool up) 2024 { 2025 phylink_link_changed(pl, up, "mac"); 2026 } 2027 EXPORT_SYMBOL_GPL(phylink_mac_change); 2028 2029 /** 2030 * phylink_pcs_change() - notify phylink of a change to PCS link state 2031 * @pcs: pointer to &struct phylink_pcs 2032 * @up: indicates whether the link is currently up. 2033 * 2034 * The PCS driver should call this when the state of its link changes 2035 * (e.g. link failure, new negotiation results, etc.) Note: it should 2036 * not determine "up" by reading the BMSR. If in doubt about the link 2037 * state at interrupt time, then pass true if pcs_get_state() returns 2038 * the latched link-down state, otherwise pass false. 2039 */ 2040 void phylink_pcs_change(struct phylink_pcs *pcs, bool up) 2041 { 2042 struct phylink *pl = pcs->phylink; 2043 2044 if (pl) 2045 phylink_link_changed(pl, up, "pcs"); 2046 } 2047 EXPORT_SYMBOL_GPL(phylink_pcs_change); 2048 2049 static irqreturn_t phylink_link_handler(int irq, void *data) 2050 { 2051 struct phylink *pl = data; 2052 2053 phylink_run_resolve(pl); 2054 2055 return IRQ_HANDLED; 2056 } 2057 2058 /** 2059 * phylink_start() - start a phylink instance 2060 * @pl: a pointer to a &struct phylink returned from phylink_create() 2061 * 2062 * Start the phylink instance specified by @pl, configuring the MAC for the 2063 * desired link mode(s) and negotiation style. This should be called from the 2064 * network device driver's &struct net_device_ops ndo_open() method. 2065 */ 2066 void phylink_start(struct phylink *pl) 2067 { 2068 bool poll = false; 2069 2070 ASSERT_RTNL(); 2071 2072 phylink_info(pl, "configuring for %s/%s link mode\n", 2073 phylink_an_mode_str(pl->cur_link_an_mode), 2074 phy_modes(pl->link_config.interface)); 2075 2076 /* Always set the carrier off */ 2077 if (pl->netdev) 2078 netif_carrier_off(pl->netdev); 2079 2080 pl->pcs_state = PCS_STATE_STARTING; 2081 2082 /* Apply the link configuration to the MAC when starting. This allows 2083 * a fixed-link to start with the correct parameters, and also 2084 * ensures that we set the appropriate advertisement for Serdes links. 2085 * 2086 * Restart autonegotiation if using 802.3z to ensure that the link 2087 * parameters are properly negotiated. This is necessary for DSA 2088 * switches using 802.3z negotiation to ensure they see our modes. 2089 */ 2090 phylink_mac_initial_config(pl, true); 2091 2092 pl->pcs_state = PCS_STATE_STARTED; 2093 2094 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_STOPPED); 2095 2096 if (pl->cfg_link_an_mode == MLO_AN_FIXED && pl->link_gpio) { 2097 int irq = gpiod_to_irq(pl->link_gpio); 2098 2099 if (irq > 0) { 2100 if (!request_irq(irq, phylink_link_handler, 2101 IRQF_TRIGGER_RISING | 2102 IRQF_TRIGGER_FALLING, 2103 "netdev link", pl)) 2104 pl->link_irq = irq; 2105 else 2106 irq = 0; 2107 } 2108 if (irq <= 0) 2109 poll = true; 2110 } 2111 2112 if (pl->cfg_link_an_mode == MLO_AN_FIXED) 2113 poll |= pl->config->poll_fixed_state; 2114 2115 if (poll) 2116 mod_timer(&pl->link_poll, jiffies + HZ); 2117 if (pl->phydev) 2118 phy_start(pl->phydev); 2119 if (pl->sfp_bus) 2120 sfp_upstream_start(pl->sfp_bus); 2121 } 2122 EXPORT_SYMBOL_GPL(phylink_start); 2123 2124 /** 2125 * phylink_stop() - stop a phylink instance 2126 * @pl: a pointer to a &struct phylink returned from phylink_create() 2127 * 2128 * Stop the phylink instance specified by @pl. This should be called from the 2129 * network device driver's &struct net_device_ops ndo_stop() method. The 2130 * network device's carrier state should not be changed prior to calling this 2131 * function. 2132 * 2133 * This will synchronously bring down the link if the link is not already 2134 * down (in other words, it will trigger a mac_link_down() method call.) 2135 */ 2136 void phylink_stop(struct phylink *pl) 2137 { 2138 ASSERT_RTNL(); 2139 2140 if (pl->sfp_bus) 2141 sfp_upstream_stop(pl->sfp_bus); 2142 if (pl->phydev) 2143 phy_stop(pl->phydev); 2144 del_timer_sync(&pl->link_poll); 2145 if (pl->link_irq) { 2146 free_irq(pl->link_irq, pl); 2147 pl->link_irq = 0; 2148 } 2149 2150 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED); 2151 2152 pl->pcs_state = PCS_STATE_DOWN; 2153 2154 phylink_pcs_disable(pl->pcs); 2155 } 2156 EXPORT_SYMBOL_GPL(phylink_stop); 2157 2158 /** 2159 * phylink_suspend() - handle a network device suspend event 2160 * @pl: a pointer to a &struct phylink returned from phylink_create() 2161 * @mac_wol: true if the MAC needs to receive packets for Wake-on-Lan 2162 * 2163 * Handle a network device suspend event. There are several cases: 2164 * 2165 * - If Wake-on-Lan is not active, we can bring down the link between 2166 * the MAC and PHY by calling phylink_stop(). 2167 * - If Wake-on-Lan is active, and being handled only by the PHY, we 2168 * can also bring down the link between the MAC and PHY. 2169 * - If Wake-on-Lan is active, but being handled by the MAC, the MAC 2170 * still needs to receive packets, so we can not bring the link down. 2171 */ 2172 void phylink_suspend(struct phylink *pl, bool mac_wol) 2173 { 2174 ASSERT_RTNL(); 2175 2176 if (mac_wol && (!pl->netdev || pl->netdev->wol_enabled)) { 2177 /* Wake-on-Lan enabled, MAC handling */ 2178 mutex_lock(&pl->state_mutex); 2179 2180 /* Stop the resolver bringing the link up */ 2181 __set_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state); 2182 2183 /* Disable the carrier, to prevent transmit timeouts, 2184 * but one would hope all packets have been sent. This 2185 * also means phylink_resolve() will do nothing. 2186 */ 2187 if (pl->netdev) 2188 netif_carrier_off(pl->netdev); 2189 else 2190 pl->old_link_state = false; 2191 2192 /* We do not call mac_link_down() here as we want the 2193 * link to remain up to receive the WoL packets. 2194 */ 2195 mutex_unlock(&pl->state_mutex); 2196 } else { 2197 phylink_stop(pl); 2198 } 2199 } 2200 EXPORT_SYMBOL_GPL(phylink_suspend); 2201 2202 /** 2203 * phylink_resume() - handle a network device resume event 2204 * @pl: a pointer to a &struct phylink returned from phylink_create() 2205 * 2206 * Undo the effects of phylink_suspend(), returning the link to an 2207 * operational state. 2208 */ 2209 void phylink_resume(struct phylink *pl) 2210 { 2211 ASSERT_RTNL(); 2212 2213 if (test_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state)) { 2214 /* Wake-on-Lan enabled, MAC handling */ 2215 2216 /* Call mac_link_down() so we keep the overall state balanced. 2217 * Do this under the state_mutex lock for consistency. This 2218 * will cause a "Link Down" message to be printed during 2219 * resume, which is harmless - the true link state will be 2220 * printed when we run a resolve. 2221 */ 2222 mutex_lock(&pl->state_mutex); 2223 phylink_link_down(pl); 2224 mutex_unlock(&pl->state_mutex); 2225 2226 /* Re-apply the link parameters so that all the settings get 2227 * restored to the MAC. 2228 */ 2229 phylink_mac_initial_config(pl, true); 2230 2231 /* Re-enable and re-resolve the link parameters */ 2232 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_MAC_WOL); 2233 } else { 2234 phylink_start(pl); 2235 } 2236 } 2237 EXPORT_SYMBOL_GPL(phylink_resume); 2238 2239 /** 2240 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY 2241 * @pl: a pointer to a &struct phylink returned from phylink_create() 2242 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters 2243 * 2244 * Read the wake on lan parameters from the PHY attached to the phylink 2245 * instance specified by @pl. If no PHY is currently attached, report no 2246 * support for wake on lan. 2247 */ 2248 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 2249 { 2250 ASSERT_RTNL(); 2251 2252 wol->supported = 0; 2253 wol->wolopts = 0; 2254 2255 if (pl->phydev) 2256 phy_ethtool_get_wol(pl->phydev, wol); 2257 } 2258 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol); 2259 2260 /** 2261 * phylink_ethtool_set_wol() - set wake on lan parameters 2262 * @pl: a pointer to a &struct phylink returned from phylink_create() 2263 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters 2264 * 2265 * Set the wake on lan parameters for the PHY attached to the phylink 2266 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP 2267 * error. 2268 * 2269 * Returns zero on success or negative errno code. 2270 */ 2271 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 2272 { 2273 int ret = -EOPNOTSUPP; 2274 2275 ASSERT_RTNL(); 2276 2277 if (pl->phydev) 2278 ret = phy_ethtool_set_wol(pl->phydev, wol); 2279 2280 return ret; 2281 } 2282 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol); 2283 2284 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b) 2285 { 2286 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask); 2287 2288 linkmode_zero(mask); 2289 phylink_set_port_modes(mask); 2290 2291 linkmode_and(dst, dst, mask); 2292 linkmode_or(dst, dst, b); 2293 } 2294 2295 static void phylink_get_ksettings(const struct phylink_link_state *state, 2296 struct ethtool_link_ksettings *kset) 2297 { 2298 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising); 2299 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising); 2300 if (kset->base.rate_matching == RATE_MATCH_NONE) { 2301 kset->base.speed = state->speed; 2302 kset->base.duplex = state->duplex; 2303 } 2304 kset->base.autoneg = linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2305 state->advertising) ? 2306 AUTONEG_ENABLE : AUTONEG_DISABLE; 2307 } 2308 2309 /** 2310 * phylink_ethtool_ksettings_get() - get the current link settings 2311 * @pl: a pointer to a &struct phylink returned from phylink_create() 2312 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings 2313 * 2314 * Read the current link settings for the phylink instance specified by @pl. 2315 * This will be the link settings read from the MAC, PHY or fixed link 2316 * settings depending on the current negotiation mode. 2317 */ 2318 int phylink_ethtool_ksettings_get(struct phylink *pl, 2319 struct ethtool_link_ksettings *kset) 2320 { 2321 struct phylink_link_state link_state; 2322 2323 ASSERT_RTNL(); 2324 2325 if (pl->phydev) 2326 phy_ethtool_ksettings_get(pl->phydev, kset); 2327 else 2328 kset->base.port = pl->link_port; 2329 2330 linkmode_copy(kset->link_modes.supported, pl->supported); 2331 2332 switch (pl->cur_link_an_mode) { 2333 case MLO_AN_FIXED: 2334 /* We are using fixed settings. Report these as the 2335 * current link settings - and note that these also 2336 * represent the supported speeds/duplex/pause modes. 2337 */ 2338 phylink_get_fixed_state(pl, &link_state); 2339 phylink_get_ksettings(&link_state, kset); 2340 break; 2341 2342 case MLO_AN_INBAND: 2343 /* If there is a phy attached, then use the reported 2344 * settings from the phy with no modification. 2345 */ 2346 if (pl->phydev) 2347 break; 2348 2349 phylink_mac_pcs_get_state(pl, &link_state); 2350 2351 /* The MAC is reporting the link results from its own PCS 2352 * layer via in-band status. Report these as the current 2353 * link settings. 2354 */ 2355 phylink_get_ksettings(&link_state, kset); 2356 break; 2357 } 2358 2359 return 0; 2360 } 2361 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get); 2362 2363 /** 2364 * phylink_ethtool_ksettings_set() - set the link settings 2365 * @pl: a pointer to a &struct phylink returned from phylink_create() 2366 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes 2367 */ 2368 int phylink_ethtool_ksettings_set(struct phylink *pl, 2369 const struct ethtool_link_ksettings *kset) 2370 { 2371 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 2372 struct phylink_link_state config; 2373 const struct phy_setting *s; 2374 2375 ASSERT_RTNL(); 2376 2377 if (pl->phydev) { 2378 struct ethtool_link_ksettings phy_kset = *kset; 2379 2380 linkmode_and(phy_kset.link_modes.advertising, 2381 phy_kset.link_modes.advertising, 2382 pl->supported); 2383 2384 /* We can rely on phylib for this update; we also do not need 2385 * to update the pl->link_config settings: 2386 * - the configuration returned via ksettings_get() will come 2387 * from phylib whenever a PHY is present. 2388 * - link_config.interface will be updated by the PHY calling 2389 * back via phylink_phy_change() and a subsequent resolve. 2390 * - initial link configuration for PHY mode comes from the 2391 * last phy state updated via phylink_phy_change(). 2392 * - other configuration changes (e.g. pause modes) are 2393 * performed directly via phylib. 2394 * - if in in-band mode with a PHY, the link configuration 2395 * is passed on the link from the PHY, and all of 2396 * link_config.{speed,duplex,an_enabled,pause} are not used. 2397 * - the only possible use would be link_config.advertising 2398 * pause modes when in 1000base-X mode with a PHY, but in 2399 * the presence of a PHY, this should not be changed as that 2400 * should be determined from the media side advertisement. 2401 */ 2402 return phy_ethtool_ksettings_set(pl->phydev, &phy_kset); 2403 } 2404 2405 config = pl->link_config; 2406 /* Mask out unsupported advertisements */ 2407 linkmode_and(config.advertising, kset->link_modes.advertising, 2408 pl->supported); 2409 2410 /* FIXME: should we reject autoneg if phy/mac does not support it? */ 2411 switch (kset->base.autoneg) { 2412 case AUTONEG_DISABLE: 2413 /* Autonegotiation disabled, select a suitable speed and 2414 * duplex. 2415 */ 2416 s = phy_lookup_setting(kset->base.speed, kset->base.duplex, 2417 pl->supported, false); 2418 if (!s) 2419 return -EINVAL; 2420 2421 /* If we have a fixed link, refuse to change link parameters. 2422 * If the link parameters match, accept them but do nothing. 2423 */ 2424 if (pl->cur_link_an_mode == MLO_AN_FIXED) { 2425 if (s->speed != pl->link_config.speed || 2426 s->duplex != pl->link_config.duplex) 2427 return -EINVAL; 2428 return 0; 2429 } 2430 2431 config.speed = s->speed; 2432 config.duplex = s->duplex; 2433 break; 2434 2435 case AUTONEG_ENABLE: 2436 /* If we have a fixed link, allow autonegotiation (since that 2437 * is our default case) but do not allow the advertisement to 2438 * be changed. If the advertisement matches, simply return. 2439 */ 2440 if (pl->cur_link_an_mode == MLO_AN_FIXED) { 2441 if (!linkmode_equal(config.advertising, 2442 pl->link_config.advertising)) 2443 return -EINVAL; 2444 return 0; 2445 } 2446 2447 config.speed = SPEED_UNKNOWN; 2448 config.duplex = DUPLEX_UNKNOWN; 2449 break; 2450 2451 default: 2452 return -EINVAL; 2453 } 2454 2455 /* We have ruled out the case with a PHY attached, and the 2456 * fixed-link cases. All that is left are in-band links. 2457 */ 2458 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising, 2459 kset->base.autoneg == AUTONEG_ENABLE); 2460 2461 /* If this link is with an SFP, ensure that changes to advertised modes 2462 * also cause the associated interface to be selected such that the 2463 * link can be configured correctly. 2464 */ 2465 if (pl->sfp_bus) { 2466 config.interface = sfp_select_interface(pl->sfp_bus, 2467 config.advertising); 2468 if (config.interface == PHY_INTERFACE_MODE_NA) { 2469 phylink_err(pl, 2470 "selection of interface failed, advertisement %*pb\n", 2471 __ETHTOOL_LINK_MODE_MASK_NBITS, 2472 config.advertising); 2473 return -EINVAL; 2474 } 2475 2476 /* Revalidate with the selected interface */ 2477 linkmode_copy(support, pl->supported); 2478 if (phylink_validate(pl, support, &config)) { 2479 phylink_err(pl, "validation of %s/%s with support %*pb failed\n", 2480 phylink_an_mode_str(pl->cur_link_an_mode), 2481 phy_modes(config.interface), 2482 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 2483 return -EINVAL; 2484 } 2485 } else { 2486 /* Validate without changing the current supported mask. */ 2487 linkmode_copy(support, pl->supported); 2488 if (phylink_validate(pl, support, &config)) 2489 return -EINVAL; 2490 } 2491 2492 /* If autonegotiation is enabled, we must have an advertisement */ 2493 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2494 config.advertising) && 2495 phylink_is_empty_linkmode(config.advertising)) 2496 return -EINVAL; 2497 2498 mutex_lock(&pl->state_mutex); 2499 pl->link_config.speed = config.speed; 2500 pl->link_config.duplex = config.duplex; 2501 2502 if (pl->link_config.interface != config.interface) { 2503 /* The interface changed, e.g. 1000base-X <-> 2500base-X */ 2504 /* We need to force the link down, then change the interface */ 2505 if (pl->old_link_state) { 2506 phylink_link_down(pl); 2507 pl->old_link_state = false; 2508 } 2509 if (!test_bit(PHYLINK_DISABLE_STOPPED, 2510 &pl->phylink_disable_state)) 2511 phylink_major_config(pl, false, &config); 2512 pl->link_config.interface = config.interface; 2513 linkmode_copy(pl->link_config.advertising, config.advertising); 2514 } else if (!linkmode_equal(pl->link_config.advertising, 2515 config.advertising)) { 2516 linkmode_copy(pl->link_config.advertising, config.advertising); 2517 phylink_change_inband_advert(pl); 2518 } 2519 mutex_unlock(&pl->state_mutex); 2520 2521 return 0; 2522 } 2523 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set); 2524 2525 /** 2526 * phylink_ethtool_nway_reset() - restart negotiation 2527 * @pl: a pointer to a &struct phylink returned from phylink_create() 2528 * 2529 * Restart negotiation for the phylink instance specified by @pl. This will 2530 * cause any attached phy to restart negotiation with the link partner, and 2531 * if the MAC is in a BaseX mode, the MAC will also be requested to restart 2532 * negotiation. 2533 * 2534 * Returns zero on success, or negative error code. 2535 */ 2536 int phylink_ethtool_nway_reset(struct phylink *pl) 2537 { 2538 int ret = 0; 2539 2540 ASSERT_RTNL(); 2541 2542 if (pl->phydev) 2543 ret = phy_restart_aneg(pl->phydev); 2544 phylink_pcs_an_restart(pl); 2545 2546 return ret; 2547 } 2548 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset); 2549 2550 /** 2551 * phylink_ethtool_get_pauseparam() - get the current pause parameters 2552 * @pl: a pointer to a &struct phylink returned from phylink_create() 2553 * @pause: a pointer to a &struct ethtool_pauseparam 2554 */ 2555 void phylink_ethtool_get_pauseparam(struct phylink *pl, 2556 struct ethtool_pauseparam *pause) 2557 { 2558 ASSERT_RTNL(); 2559 2560 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN); 2561 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX); 2562 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX); 2563 } 2564 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam); 2565 2566 /** 2567 * phylink_ethtool_set_pauseparam() - set the current pause parameters 2568 * @pl: a pointer to a &struct phylink returned from phylink_create() 2569 * @pause: a pointer to a &struct ethtool_pauseparam 2570 */ 2571 int phylink_ethtool_set_pauseparam(struct phylink *pl, 2572 struct ethtool_pauseparam *pause) 2573 { 2574 struct phylink_link_state *config = &pl->link_config; 2575 bool manual_changed; 2576 int pause_state; 2577 2578 ASSERT_RTNL(); 2579 2580 if (pl->cur_link_an_mode == MLO_AN_FIXED) 2581 return -EOPNOTSUPP; 2582 2583 if (!phylink_test(pl->supported, Pause) && 2584 !phylink_test(pl->supported, Asym_Pause)) 2585 return -EOPNOTSUPP; 2586 2587 if (!phylink_test(pl->supported, Asym_Pause) && 2588 pause->rx_pause != pause->tx_pause) 2589 return -EINVAL; 2590 2591 pause_state = 0; 2592 if (pause->autoneg) 2593 pause_state |= MLO_PAUSE_AN; 2594 if (pause->rx_pause) 2595 pause_state |= MLO_PAUSE_RX; 2596 if (pause->tx_pause) 2597 pause_state |= MLO_PAUSE_TX; 2598 2599 mutex_lock(&pl->state_mutex); 2600 /* 2601 * See the comments for linkmode_set_pause(), wrt the deficiencies 2602 * with the current implementation. A solution to this issue would 2603 * be: 2604 * ethtool Local device 2605 * rx tx Pause AsymDir 2606 * 0 0 0 0 2607 * 1 0 1 1 2608 * 0 1 0 1 2609 * 1 1 1 1 2610 * and then use the ethtool rx/tx enablement status to mask the 2611 * rx/tx pause resolution. 2612 */ 2613 linkmode_set_pause(config->advertising, pause->tx_pause, 2614 pause->rx_pause); 2615 2616 manual_changed = (config->pause ^ pause_state) & MLO_PAUSE_AN || 2617 (!(pause_state & MLO_PAUSE_AN) && 2618 (config->pause ^ pause_state) & MLO_PAUSE_TXRX_MASK); 2619 2620 config->pause = pause_state; 2621 2622 /* Update our in-band advertisement, triggering a renegotiation if 2623 * the advertisement changed. 2624 */ 2625 if (!pl->phydev) 2626 phylink_change_inband_advert(pl); 2627 2628 mutex_unlock(&pl->state_mutex); 2629 2630 /* If we have a PHY, a change of the pause frame advertisement will 2631 * cause phylib to renegotiate (if AN is enabled) which will in turn 2632 * call our phylink_phy_change() and trigger a resolve. Note that 2633 * we can't hold our state mutex while calling phy_set_asym_pause(). 2634 */ 2635 if (pl->phydev) 2636 phy_set_asym_pause(pl->phydev, pause->rx_pause, 2637 pause->tx_pause); 2638 2639 /* If the manual pause settings changed, make sure we trigger a 2640 * resolve to update their state; we can not guarantee that the 2641 * link will cycle. 2642 */ 2643 if (manual_changed) { 2644 pl->mac_link_dropped = true; 2645 phylink_run_resolve(pl); 2646 } 2647 2648 return 0; 2649 } 2650 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam); 2651 2652 /** 2653 * phylink_get_eee_err() - read the energy efficient ethernet error 2654 * counter 2655 * @pl: a pointer to a &struct phylink returned from phylink_create(). 2656 * 2657 * Read the Energy Efficient Ethernet error counter from the PHY associated 2658 * with the phylink instance specified by @pl. 2659 * 2660 * Returns positive error counter value, or negative error code. 2661 */ 2662 int phylink_get_eee_err(struct phylink *pl) 2663 { 2664 int ret = 0; 2665 2666 ASSERT_RTNL(); 2667 2668 if (pl->phydev) 2669 ret = phy_get_eee_err(pl->phydev); 2670 2671 return ret; 2672 } 2673 EXPORT_SYMBOL_GPL(phylink_get_eee_err); 2674 2675 /** 2676 * phylink_init_eee() - init and check the EEE features 2677 * @pl: a pointer to a &struct phylink returned from phylink_create() 2678 * @clk_stop_enable: allow PHY to stop receive clock 2679 * 2680 * Must be called either with RTNL held or within mac_link_up() 2681 */ 2682 int phylink_init_eee(struct phylink *pl, bool clk_stop_enable) 2683 { 2684 int ret = -EOPNOTSUPP; 2685 2686 if (pl->phydev) 2687 ret = phy_init_eee(pl->phydev, clk_stop_enable); 2688 2689 return ret; 2690 } 2691 EXPORT_SYMBOL_GPL(phylink_init_eee); 2692 2693 /** 2694 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters 2695 * @pl: a pointer to a &struct phylink returned from phylink_create() 2696 * @eee: a pointer to a &struct ethtool_eee for the read parameters 2697 */ 2698 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee) 2699 { 2700 int ret = -EOPNOTSUPP; 2701 2702 ASSERT_RTNL(); 2703 2704 if (pl->phydev) 2705 ret = phy_ethtool_get_eee(pl->phydev, eee); 2706 2707 return ret; 2708 } 2709 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee); 2710 2711 /** 2712 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters 2713 * @pl: a pointer to a &struct phylink returned from phylink_create() 2714 * @eee: a pointer to a &struct ethtool_eee for the desired parameters 2715 */ 2716 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee) 2717 { 2718 int ret = -EOPNOTSUPP; 2719 2720 ASSERT_RTNL(); 2721 2722 if (pl->phydev) 2723 ret = phy_ethtool_set_eee(pl->phydev, eee); 2724 2725 return ret; 2726 } 2727 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee); 2728 2729 /* This emulates MII registers for a fixed-mode phy operating as per the 2730 * passed in state. "aneg" defines if we report negotiation is possible. 2731 * 2732 * FIXME: should deal with negotiation state too. 2733 */ 2734 static int phylink_mii_emul_read(unsigned int reg, 2735 struct phylink_link_state *state) 2736 { 2737 struct fixed_phy_status fs; 2738 unsigned long *lpa = state->lp_advertising; 2739 int val; 2740 2741 fs.link = state->link; 2742 fs.speed = state->speed; 2743 fs.duplex = state->duplex; 2744 fs.pause = test_bit(ETHTOOL_LINK_MODE_Pause_BIT, lpa); 2745 fs.asym_pause = test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, lpa); 2746 2747 val = swphy_read_reg(reg, &fs); 2748 if (reg == MII_BMSR) { 2749 if (!state->an_complete) 2750 val &= ~BMSR_ANEGCOMPLETE; 2751 } 2752 return val; 2753 } 2754 2755 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id, 2756 unsigned int reg) 2757 { 2758 struct phy_device *phydev = pl->phydev; 2759 int prtad, devad; 2760 2761 if (mdio_phy_id_is_c45(phy_id)) { 2762 prtad = mdio_phy_id_prtad(phy_id); 2763 devad = mdio_phy_id_devad(phy_id); 2764 return mdiobus_c45_read(pl->phydev->mdio.bus, prtad, devad, 2765 reg); 2766 } 2767 2768 if (phydev->is_c45) { 2769 switch (reg) { 2770 case MII_BMCR: 2771 case MII_BMSR: 2772 case MII_PHYSID1: 2773 case MII_PHYSID2: 2774 devad = __ffs(phydev->c45_ids.mmds_present); 2775 break; 2776 case MII_ADVERTISE: 2777 case MII_LPA: 2778 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 2779 return -EINVAL; 2780 devad = MDIO_MMD_AN; 2781 if (reg == MII_ADVERTISE) 2782 reg = MDIO_AN_ADVERTISE; 2783 else 2784 reg = MDIO_AN_LPA; 2785 break; 2786 default: 2787 return -EINVAL; 2788 } 2789 prtad = phy_id; 2790 return mdiobus_c45_read(pl->phydev->mdio.bus, prtad, devad, 2791 reg); 2792 } 2793 2794 return mdiobus_read(pl->phydev->mdio.bus, phy_id, reg); 2795 } 2796 2797 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id, 2798 unsigned int reg, unsigned int val) 2799 { 2800 struct phy_device *phydev = pl->phydev; 2801 int prtad, devad; 2802 2803 if (mdio_phy_id_is_c45(phy_id)) { 2804 prtad = mdio_phy_id_prtad(phy_id); 2805 devad = mdio_phy_id_devad(phy_id); 2806 return mdiobus_c45_write(pl->phydev->mdio.bus, prtad, devad, 2807 reg, val); 2808 } 2809 2810 if (phydev->is_c45) { 2811 switch (reg) { 2812 case MII_BMCR: 2813 case MII_BMSR: 2814 case MII_PHYSID1: 2815 case MII_PHYSID2: 2816 devad = __ffs(phydev->c45_ids.mmds_present); 2817 break; 2818 case MII_ADVERTISE: 2819 case MII_LPA: 2820 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 2821 return -EINVAL; 2822 devad = MDIO_MMD_AN; 2823 if (reg == MII_ADVERTISE) 2824 reg = MDIO_AN_ADVERTISE; 2825 else 2826 reg = MDIO_AN_LPA; 2827 break; 2828 default: 2829 return -EINVAL; 2830 } 2831 return mdiobus_c45_write(pl->phydev->mdio.bus, phy_id, devad, 2832 reg, val); 2833 } 2834 2835 return mdiobus_write(phydev->mdio.bus, phy_id, reg, val); 2836 } 2837 2838 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id, 2839 unsigned int reg) 2840 { 2841 struct phylink_link_state state; 2842 int val = 0xffff; 2843 2844 switch (pl->cur_link_an_mode) { 2845 case MLO_AN_FIXED: 2846 if (phy_id == 0) { 2847 phylink_get_fixed_state(pl, &state); 2848 val = phylink_mii_emul_read(reg, &state); 2849 } 2850 break; 2851 2852 case MLO_AN_PHY: 2853 return -EOPNOTSUPP; 2854 2855 case MLO_AN_INBAND: 2856 if (phy_id == 0) { 2857 phylink_mac_pcs_get_state(pl, &state); 2858 val = phylink_mii_emul_read(reg, &state); 2859 } 2860 break; 2861 } 2862 2863 return val & 0xffff; 2864 } 2865 2866 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id, 2867 unsigned int reg, unsigned int val) 2868 { 2869 switch (pl->cur_link_an_mode) { 2870 case MLO_AN_FIXED: 2871 break; 2872 2873 case MLO_AN_PHY: 2874 return -EOPNOTSUPP; 2875 2876 case MLO_AN_INBAND: 2877 break; 2878 } 2879 2880 return 0; 2881 } 2882 2883 /** 2884 * phylink_mii_ioctl() - generic mii ioctl interface 2885 * @pl: a pointer to a &struct phylink returned from phylink_create() 2886 * @ifr: a pointer to a &struct ifreq for socket ioctls 2887 * @cmd: ioctl cmd to execute 2888 * 2889 * Perform the specified MII ioctl on the PHY attached to the phylink instance 2890 * specified by @pl. If no PHY is attached, emulate the presence of the PHY. 2891 * 2892 * Returns: zero on success or negative error code. 2893 * 2894 * %SIOCGMIIPHY: 2895 * read register from the current PHY. 2896 * %SIOCGMIIREG: 2897 * read register from the specified PHY. 2898 * %SIOCSMIIREG: 2899 * set a register on the specified PHY. 2900 */ 2901 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd) 2902 { 2903 struct mii_ioctl_data *mii = if_mii(ifr); 2904 int ret; 2905 2906 ASSERT_RTNL(); 2907 2908 if (pl->phydev) { 2909 /* PHYs only exist for MLO_AN_PHY and SGMII */ 2910 switch (cmd) { 2911 case SIOCGMIIPHY: 2912 mii->phy_id = pl->phydev->mdio.addr; 2913 fallthrough; 2914 2915 case SIOCGMIIREG: 2916 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num); 2917 if (ret >= 0) { 2918 mii->val_out = ret; 2919 ret = 0; 2920 } 2921 break; 2922 2923 case SIOCSMIIREG: 2924 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num, 2925 mii->val_in); 2926 break; 2927 2928 default: 2929 ret = phy_mii_ioctl(pl->phydev, ifr, cmd); 2930 break; 2931 } 2932 } else { 2933 switch (cmd) { 2934 case SIOCGMIIPHY: 2935 mii->phy_id = 0; 2936 fallthrough; 2937 2938 case SIOCGMIIREG: 2939 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num); 2940 if (ret >= 0) { 2941 mii->val_out = ret; 2942 ret = 0; 2943 } 2944 break; 2945 2946 case SIOCSMIIREG: 2947 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num, 2948 mii->val_in); 2949 break; 2950 2951 default: 2952 ret = -EOPNOTSUPP; 2953 break; 2954 } 2955 } 2956 2957 return ret; 2958 } 2959 EXPORT_SYMBOL_GPL(phylink_mii_ioctl); 2960 2961 /** 2962 * phylink_speed_down() - set the non-SFP PHY to lowest speed supported by both 2963 * link partners 2964 * @pl: a pointer to a &struct phylink returned from phylink_create() 2965 * @sync: perform action synchronously 2966 * 2967 * If we have a PHY that is not part of a SFP module, then set the speed 2968 * as described in the phy_speed_down() function. Please see this function 2969 * for a description of the @sync parameter. 2970 * 2971 * Returns zero if there is no PHY, otherwise as per phy_speed_down(). 2972 */ 2973 int phylink_speed_down(struct phylink *pl, bool sync) 2974 { 2975 int ret = 0; 2976 2977 ASSERT_RTNL(); 2978 2979 if (!pl->sfp_bus && pl->phydev) 2980 ret = phy_speed_down(pl->phydev, sync); 2981 2982 return ret; 2983 } 2984 EXPORT_SYMBOL_GPL(phylink_speed_down); 2985 2986 /** 2987 * phylink_speed_up() - restore the advertised speeds prior to the call to 2988 * phylink_speed_down() 2989 * @pl: a pointer to a &struct phylink returned from phylink_create() 2990 * 2991 * If we have a PHY that is not part of a SFP module, then restore the 2992 * PHY speeds as per phy_speed_up(). 2993 * 2994 * Returns zero if there is no PHY, otherwise as per phy_speed_up(). 2995 */ 2996 int phylink_speed_up(struct phylink *pl) 2997 { 2998 int ret = 0; 2999 3000 ASSERT_RTNL(); 3001 3002 if (!pl->sfp_bus && pl->phydev) 3003 ret = phy_speed_up(pl->phydev); 3004 3005 return ret; 3006 } 3007 EXPORT_SYMBOL_GPL(phylink_speed_up); 3008 3009 static void phylink_sfp_attach(void *upstream, struct sfp_bus *bus) 3010 { 3011 struct phylink *pl = upstream; 3012 3013 pl->netdev->sfp_bus = bus; 3014 } 3015 3016 static void phylink_sfp_detach(void *upstream, struct sfp_bus *bus) 3017 { 3018 struct phylink *pl = upstream; 3019 3020 pl->netdev->sfp_bus = NULL; 3021 } 3022 3023 static const phy_interface_t phylink_sfp_interface_preference[] = { 3024 PHY_INTERFACE_MODE_25GBASER, 3025 PHY_INTERFACE_MODE_USXGMII, 3026 PHY_INTERFACE_MODE_10GBASER, 3027 PHY_INTERFACE_MODE_5GBASER, 3028 PHY_INTERFACE_MODE_2500BASEX, 3029 PHY_INTERFACE_MODE_SGMII, 3030 PHY_INTERFACE_MODE_1000BASEX, 3031 PHY_INTERFACE_MODE_100BASEX, 3032 }; 3033 3034 static DECLARE_PHY_INTERFACE_MASK(phylink_sfp_interfaces); 3035 3036 static phy_interface_t phylink_choose_sfp_interface(struct phylink *pl, 3037 const unsigned long *intf) 3038 { 3039 phy_interface_t interface; 3040 size_t i; 3041 3042 interface = PHY_INTERFACE_MODE_NA; 3043 for (i = 0; i < ARRAY_SIZE(phylink_sfp_interface_preference); i++) 3044 if (test_bit(phylink_sfp_interface_preference[i], intf)) { 3045 interface = phylink_sfp_interface_preference[i]; 3046 break; 3047 } 3048 3049 return interface; 3050 } 3051 3052 static void phylink_sfp_set_config(struct phylink *pl, u8 mode, 3053 unsigned long *supported, 3054 struct phylink_link_state *state) 3055 { 3056 bool changed = false; 3057 3058 phylink_dbg(pl, "requesting link mode %s/%s with support %*pb\n", 3059 phylink_an_mode_str(mode), phy_modes(state->interface), 3060 __ETHTOOL_LINK_MODE_MASK_NBITS, supported); 3061 3062 if (!linkmode_equal(pl->supported, supported)) { 3063 linkmode_copy(pl->supported, supported); 3064 changed = true; 3065 } 3066 3067 if (!linkmode_equal(pl->link_config.advertising, state->advertising)) { 3068 linkmode_copy(pl->link_config.advertising, state->advertising); 3069 changed = true; 3070 } 3071 3072 if (pl->cur_link_an_mode != mode || 3073 pl->link_config.interface != state->interface) { 3074 pl->cur_link_an_mode = mode; 3075 pl->link_config.interface = state->interface; 3076 3077 changed = true; 3078 3079 phylink_info(pl, "switched to %s/%s link mode\n", 3080 phylink_an_mode_str(mode), 3081 phy_modes(state->interface)); 3082 } 3083 3084 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED, 3085 &pl->phylink_disable_state)) 3086 phylink_mac_initial_config(pl, false); 3087 } 3088 3089 static int phylink_sfp_config_phy(struct phylink *pl, u8 mode, 3090 struct phy_device *phy) 3091 { 3092 __ETHTOOL_DECLARE_LINK_MODE_MASK(support1); 3093 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 3094 struct phylink_link_state config; 3095 phy_interface_t iface; 3096 int ret; 3097 3098 linkmode_copy(support, phy->supported); 3099 3100 memset(&config, 0, sizeof(config)); 3101 linkmode_copy(config.advertising, phy->advertising); 3102 config.interface = PHY_INTERFACE_MODE_NA; 3103 config.speed = SPEED_UNKNOWN; 3104 config.duplex = DUPLEX_UNKNOWN; 3105 config.pause = MLO_PAUSE_AN; 3106 3107 /* Ignore errors if we're expecting a PHY to attach later */ 3108 ret = phylink_validate(pl, support, &config); 3109 if (ret) { 3110 phylink_err(pl, "validation with support %*pb failed: %pe\n", 3111 __ETHTOOL_LINK_MODE_MASK_NBITS, support, 3112 ERR_PTR(ret)); 3113 return ret; 3114 } 3115 3116 iface = sfp_select_interface(pl->sfp_bus, config.advertising); 3117 if (iface == PHY_INTERFACE_MODE_NA) { 3118 phylink_err(pl, 3119 "selection of interface failed, advertisement %*pb\n", 3120 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising); 3121 return -EINVAL; 3122 } 3123 3124 config.interface = iface; 3125 linkmode_copy(support1, support); 3126 ret = phylink_validate(pl, support1, &config); 3127 if (ret) { 3128 phylink_err(pl, 3129 "validation of %s/%s with support %*pb failed: %pe\n", 3130 phylink_an_mode_str(mode), 3131 phy_modes(config.interface), 3132 __ETHTOOL_LINK_MODE_MASK_NBITS, support, 3133 ERR_PTR(ret)); 3134 return ret; 3135 } 3136 3137 pl->link_port = pl->sfp_port; 3138 3139 phylink_sfp_set_config(pl, mode, support, &config); 3140 3141 return 0; 3142 } 3143 3144 static int phylink_sfp_config_optical(struct phylink *pl) 3145 { 3146 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 3147 DECLARE_PHY_INTERFACE_MASK(interfaces); 3148 struct phylink_link_state config; 3149 phy_interface_t interface; 3150 int ret; 3151 3152 phylink_dbg(pl, "optical SFP: interfaces=[mac=%*pbl, sfp=%*pbl]\n", 3153 (int)PHY_INTERFACE_MODE_MAX, 3154 pl->config->supported_interfaces, 3155 (int)PHY_INTERFACE_MODE_MAX, 3156 pl->sfp_interfaces); 3157 3158 /* Find the union of the supported interfaces by the PCS/MAC and 3159 * the SFP module. 3160 */ 3161 phy_interface_and(interfaces, pl->config->supported_interfaces, 3162 pl->sfp_interfaces); 3163 if (phy_interface_empty(interfaces)) { 3164 phylink_err(pl, "unsupported SFP module: no common interface modes\n"); 3165 return -EINVAL; 3166 } 3167 3168 memset(&config, 0, sizeof(config)); 3169 linkmode_copy(support, pl->sfp_support); 3170 linkmode_copy(config.advertising, pl->sfp_support); 3171 config.speed = SPEED_UNKNOWN; 3172 config.duplex = DUPLEX_UNKNOWN; 3173 config.pause = MLO_PAUSE_AN; 3174 3175 /* For all the interfaces that are supported, reduce the sfp_support 3176 * mask to only those link modes that can be supported. 3177 */ 3178 ret = phylink_validate_mask(pl, pl->sfp_support, &config, interfaces); 3179 if (ret) { 3180 phylink_err(pl, "unsupported SFP module: validation with support %*pb failed\n", 3181 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 3182 return ret; 3183 } 3184 3185 interface = phylink_choose_sfp_interface(pl, interfaces); 3186 if (interface == PHY_INTERFACE_MODE_NA) { 3187 phylink_err(pl, "failed to select SFP interface\n"); 3188 return -EINVAL; 3189 } 3190 3191 phylink_dbg(pl, "optical SFP: chosen %s interface\n", 3192 phy_modes(interface)); 3193 3194 config.interface = interface; 3195 3196 /* Ignore errors if we're expecting a PHY to attach later */ 3197 ret = phylink_validate(pl, support, &config); 3198 if (ret) { 3199 phylink_err(pl, "validation with support %*pb failed: %pe\n", 3200 __ETHTOOL_LINK_MODE_MASK_NBITS, support, 3201 ERR_PTR(ret)); 3202 return ret; 3203 } 3204 3205 pl->link_port = pl->sfp_port; 3206 3207 phylink_sfp_set_config(pl, MLO_AN_INBAND, pl->sfp_support, &config); 3208 3209 return 0; 3210 } 3211 3212 static int phylink_sfp_module_insert(void *upstream, 3213 const struct sfp_eeprom_id *id) 3214 { 3215 struct phylink *pl = upstream; 3216 3217 ASSERT_RTNL(); 3218 3219 linkmode_zero(pl->sfp_support); 3220 phy_interface_zero(pl->sfp_interfaces); 3221 sfp_parse_support(pl->sfp_bus, id, pl->sfp_support, pl->sfp_interfaces); 3222 pl->sfp_port = sfp_parse_port(pl->sfp_bus, id, pl->sfp_support); 3223 3224 /* If this module may have a PHY connecting later, defer until later */ 3225 pl->sfp_may_have_phy = sfp_may_have_phy(pl->sfp_bus, id); 3226 if (pl->sfp_may_have_phy) 3227 return 0; 3228 3229 return phylink_sfp_config_optical(pl); 3230 } 3231 3232 static int phylink_sfp_module_start(void *upstream) 3233 { 3234 struct phylink *pl = upstream; 3235 3236 /* If this SFP module has a PHY, start the PHY now. */ 3237 if (pl->phydev) { 3238 phy_start(pl->phydev); 3239 return 0; 3240 } 3241 3242 /* If the module may have a PHY but we didn't detect one we 3243 * need to configure the MAC here. 3244 */ 3245 if (!pl->sfp_may_have_phy) 3246 return 0; 3247 3248 return phylink_sfp_config_optical(pl); 3249 } 3250 3251 static void phylink_sfp_module_stop(void *upstream) 3252 { 3253 struct phylink *pl = upstream; 3254 3255 /* If this SFP module has a PHY, stop it. */ 3256 if (pl->phydev) 3257 phy_stop(pl->phydev); 3258 } 3259 3260 static void phylink_sfp_link_down(void *upstream) 3261 { 3262 struct phylink *pl = upstream; 3263 3264 ASSERT_RTNL(); 3265 3266 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_LINK); 3267 } 3268 3269 static void phylink_sfp_link_up(void *upstream) 3270 { 3271 struct phylink *pl = upstream; 3272 3273 ASSERT_RTNL(); 3274 3275 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_LINK); 3276 } 3277 3278 /* The Broadcom BCM84881 in the Methode DM7052 is unable to provide a SGMII 3279 * or 802.3z control word, so inband will not work. 3280 */ 3281 static bool phylink_phy_no_inband(struct phy_device *phy) 3282 { 3283 return phy->is_c45 && phy_id_compare(phy->c45_ids.device_ids[1], 3284 0xae025150, 0xfffffff0); 3285 } 3286 3287 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy) 3288 { 3289 struct phylink *pl = upstream; 3290 phy_interface_t interface; 3291 u8 mode; 3292 int ret; 3293 3294 /* 3295 * This is the new way of dealing with flow control for PHYs, 3296 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 3297 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 3298 * using our validate call to the MAC, we rely upon the MAC 3299 * clearing the bits from both supported and advertising fields. 3300 */ 3301 phy_support_asym_pause(phy); 3302 3303 if (phylink_phy_no_inband(phy)) 3304 mode = MLO_AN_PHY; 3305 else 3306 mode = MLO_AN_INBAND; 3307 3308 /* Set the PHY's host supported interfaces */ 3309 phy_interface_and(phy->host_interfaces, phylink_sfp_interfaces, 3310 pl->config->supported_interfaces); 3311 3312 /* Do the initial configuration */ 3313 ret = phylink_sfp_config_phy(pl, mode, phy); 3314 if (ret < 0) 3315 return ret; 3316 3317 interface = pl->link_config.interface; 3318 ret = phylink_attach_phy(pl, phy, interface); 3319 if (ret < 0) 3320 return ret; 3321 3322 ret = phylink_bringup_phy(pl, phy, interface); 3323 if (ret) 3324 phy_detach(phy); 3325 3326 return ret; 3327 } 3328 3329 static void phylink_sfp_disconnect_phy(void *upstream) 3330 { 3331 phylink_disconnect_phy(upstream); 3332 } 3333 3334 static const struct sfp_upstream_ops sfp_phylink_ops = { 3335 .attach = phylink_sfp_attach, 3336 .detach = phylink_sfp_detach, 3337 .module_insert = phylink_sfp_module_insert, 3338 .module_start = phylink_sfp_module_start, 3339 .module_stop = phylink_sfp_module_stop, 3340 .link_up = phylink_sfp_link_up, 3341 .link_down = phylink_sfp_link_down, 3342 .connect_phy = phylink_sfp_connect_phy, 3343 .disconnect_phy = phylink_sfp_disconnect_phy, 3344 }; 3345 3346 /* Helpers for MAC drivers */ 3347 3348 static struct { 3349 int bit; 3350 int speed; 3351 } phylink_c73_priority_resolution[] = { 3352 { ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT, SPEED_100000 }, 3353 { ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT, SPEED_100000 }, 3354 /* 100GBASE-KP4 and 100GBASE-CR10 not supported */ 3355 { ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT, SPEED_40000 }, 3356 { ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT, SPEED_40000 }, 3357 { ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, SPEED_10000 }, 3358 { ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, SPEED_10000 }, 3359 /* 5GBASE-KR not supported */ 3360 { ETHTOOL_LINK_MODE_2500baseX_Full_BIT, SPEED_2500 }, 3361 { ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, SPEED_1000 }, 3362 }; 3363 3364 void phylink_resolve_c73(struct phylink_link_state *state) 3365 { 3366 int i; 3367 3368 for (i = 0; i < ARRAY_SIZE(phylink_c73_priority_resolution); i++) { 3369 int bit = phylink_c73_priority_resolution[i].bit; 3370 if (linkmode_test_bit(bit, state->advertising) && 3371 linkmode_test_bit(bit, state->lp_advertising)) 3372 break; 3373 } 3374 3375 if (i < ARRAY_SIZE(phylink_c73_priority_resolution)) { 3376 state->speed = phylink_c73_priority_resolution[i].speed; 3377 state->duplex = DUPLEX_FULL; 3378 } else { 3379 /* negotiation failure */ 3380 state->link = false; 3381 } 3382 3383 phylink_resolve_an_pause(state); 3384 } 3385 EXPORT_SYMBOL_GPL(phylink_resolve_c73); 3386 3387 static void phylink_decode_c37_word(struct phylink_link_state *state, 3388 uint16_t config_reg, int speed) 3389 { 3390 int fd_bit; 3391 3392 if (speed == SPEED_2500) 3393 fd_bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT; 3394 else 3395 fd_bit = ETHTOOL_LINK_MODE_1000baseX_Full_BIT; 3396 3397 mii_lpa_mod_linkmode_x(state->lp_advertising, config_reg, fd_bit); 3398 3399 if (linkmode_test_bit(fd_bit, state->advertising) && 3400 linkmode_test_bit(fd_bit, state->lp_advertising)) { 3401 state->speed = speed; 3402 state->duplex = DUPLEX_FULL; 3403 } else { 3404 /* negotiation failure */ 3405 state->link = false; 3406 } 3407 3408 phylink_resolve_an_pause(state); 3409 } 3410 3411 static void phylink_decode_sgmii_word(struct phylink_link_state *state, 3412 uint16_t config_reg) 3413 { 3414 if (!(config_reg & LPA_SGMII_LINK)) { 3415 state->link = false; 3416 return; 3417 } 3418 3419 switch (config_reg & LPA_SGMII_SPD_MASK) { 3420 case LPA_SGMII_10: 3421 state->speed = SPEED_10; 3422 break; 3423 case LPA_SGMII_100: 3424 state->speed = SPEED_100; 3425 break; 3426 case LPA_SGMII_1000: 3427 state->speed = SPEED_1000; 3428 break; 3429 default: 3430 state->link = false; 3431 return; 3432 } 3433 if (config_reg & LPA_SGMII_FULL_DUPLEX) 3434 state->duplex = DUPLEX_FULL; 3435 else 3436 state->duplex = DUPLEX_HALF; 3437 } 3438 3439 /** 3440 * phylink_decode_usxgmii_word() - decode the USXGMII word from a MAC PCS 3441 * @state: a pointer to a struct phylink_link_state. 3442 * @lpa: a 16 bit value which stores the USXGMII auto-negotiation word 3443 * 3444 * Helper for MAC PCS supporting the USXGMII protocol and the auto-negotiation 3445 * code word. Decode the USXGMII code word and populate the corresponding fields 3446 * (speed, duplex) into the phylink_link_state structure. 3447 */ 3448 void phylink_decode_usxgmii_word(struct phylink_link_state *state, 3449 uint16_t lpa) 3450 { 3451 switch (lpa & MDIO_USXGMII_SPD_MASK) { 3452 case MDIO_USXGMII_10: 3453 state->speed = SPEED_10; 3454 break; 3455 case MDIO_USXGMII_100: 3456 state->speed = SPEED_100; 3457 break; 3458 case MDIO_USXGMII_1000: 3459 state->speed = SPEED_1000; 3460 break; 3461 case MDIO_USXGMII_2500: 3462 state->speed = SPEED_2500; 3463 break; 3464 case MDIO_USXGMII_5000: 3465 state->speed = SPEED_5000; 3466 break; 3467 case MDIO_USXGMII_10G: 3468 state->speed = SPEED_10000; 3469 break; 3470 default: 3471 state->link = false; 3472 return; 3473 } 3474 3475 if (lpa & MDIO_USXGMII_FULL_DUPLEX) 3476 state->duplex = DUPLEX_FULL; 3477 else 3478 state->duplex = DUPLEX_HALF; 3479 } 3480 EXPORT_SYMBOL_GPL(phylink_decode_usxgmii_word); 3481 3482 /** 3483 * phylink_decode_usgmii_word() - decode the USGMII word from a MAC PCS 3484 * @state: a pointer to a struct phylink_link_state. 3485 * @lpa: a 16 bit value which stores the USGMII auto-negotiation word 3486 * 3487 * Helper for MAC PCS supporting the USGMII protocol and the auto-negotiation 3488 * code word. Decode the USGMII code word and populate the corresponding fields 3489 * (speed, duplex) into the phylink_link_state structure. The structure for this 3490 * word is the same as the USXGMII word, except it only supports speeds up to 3491 * 1Gbps. 3492 */ 3493 static void phylink_decode_usgmii_word(struct phylink_link_state *state, 3494 uint16_t lpa) 3495 { 3496 switch (lpa & MDIO_USXGMII_SPD_MASK) { 3497 case MDIO_USXGMII_10: 3498 state->speed = SPEED_10; 3499 break; 3500 case MDIO_USXGMII_100: 3501 state->speed = SPEED_100; 3502 break; 3503 case MDIO_USXGMII_1000: 3504 state->speed = SPEED_1000; 3505 break; 3506 default: 3507 state->link = false; 3508 return; 3509 } 3510 3511 if (lpa & MDIO_USXGMII_FULL_DUPLEX) 3512 state->duplex = DUPLEX_FULL; 3513 else 3514 state->duplex = DUPLEX_HALF; 3515 } 3516 3517 /** 3518 * phylink_mii_c22_pcs_decode_state() - Decode MAC PCS state from MII registers 3519 * @state: a pointer to a &struct phylink_link_state. 3520 * @bmsr: The value of the %MII_BMSR register 3521 * @lpa: The value of the %MII_LPA register 3522 * 3523 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 3524 * clause 37 negotiation and/or SGMII control. 3525 * 3526 * Parse the Clause 37 or Cisco SGMII link partner negotiation word into 3527 * the phylink @state structure. This is suitable to be used for implementing 3528 * the pcs_get_state() member of the struct phylink_pcs_ops structure if 3529 * accessing @bmsr and @lpa cannot be done with MDIO directly. 3530 */ 3531 void phylink_mii_c22_pcs_decode_state(struct phylink_link_state *state, 3532 u16 bmsr, u16 lpa) 3533 { 3534 state->link = !!(bmsr & BMSR_LSTATUS); 3535 state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE); 3536 /* If there is no link or autonegotiation is disabled, the LP advertisement 3537 * data is not meaningful, so don't go any further. 3538 */ 3539 if (!state->link || !linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 3540 state->advertising)) 3541 return; 3542 3543 switch (state->interface) { 3544 case PHY_INTERFACE_MODE_1000BASEX: 3545 phylink_decode_c37_word(state, lpa, SPEED_1000); 3546 break; 3547 3548 case PHY_INTERFACE_MODE_2500BASEX: 3549 phylink_decode_c37_word(state, lpa, SPEED_2500); 3550 break; 3551 3552 case PHY_INTERFACE_MODE_SGMII: 3553 case PHY_INTERFACE_MODE_QSGMII: 3554 phylink_decode_sgmii_word(state, lpa); 3555 break; 3556 case PHY_INTERFACE_MODE_QUSGMII: 3557 phylink_decode_usgmii_word(state, lpa); 3558 break; 3559 3560 default: 3561 state->link = false; 3562 break; 3563 } 3564 } 3565 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_decode_state); 3566 3567 /** 3568 * phylink_mii_c22_pcs_get_state() - read the MAC PCS state 3569 * @pcs: a pointer to a &struct mdio_device. 3570 * @state: a pointer to a &struct phylink_link_state. 3571 * 3572 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 3573 * clause 37 negotiation and/or SGMII control. 3574 * 3575 * Read the MAC PCS state from the MII device configured in @config and 3576 * parse the Clause 37 or Cisco SGMII link partner negotiation word into 3577 * the phylink @state structure. This is suitable to be directly plugged 3578 * into the pcs_get_state() member of the struct phylink_pcs_ops 3579 * structure. 3580 */ 3581 void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs, 3582 struct phylink_link_state *state) 3583 { 3584 int bmsr, lpa; 3585 3586 bmsr = mdiodev_read(pcs, MII_BMSR); 3587 lpa = mdiodev_read(pcs, MII_LPA); 3588 if (bmsr < 0 || lpa < 0) { 3589 state->link = false; 3590 return; 3591 } 3592 3593 phylink_mii_c22_pcs_decode_state(state, bmsr, lpa); 3594 } 3595 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_get_state); 3596 3597 /** 3598 * phylink_mii_c22_pcs_encode_advertisement() - configure the clause 37 PCS 3599 * advertisement 3600 * @interface: the PHY interface mode being configured 3601 * @advertising: the ethtool advertisement mask 3602 * 3603 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 3604 * clause 37 negotiation and/or SGMII control. 3605 * 3606 * Encode the clause 37 PCS advertisement as specified by @interface and 3607 * @advertising. 3608 * 3609 * Return: The new value for @adv, or ``-EINVAL`` if it should not be changed. 3610 */ 3611 int phylink_mii_c22_pcs_encode_advertisement(phy_interface_t interface, 3612 const unsigned long *advertising) 3613 { 3614 u16 adv; 3615 3616 switch (interface) { 3617 case PHY_INTERFACE_MODE_1000BASEX: 3618 case PHY_INTERFACE_MODE_2500BASEX: 3619 adv = ADVERTISE_1000XFULL; 3620 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 3621 advertising)) 3622 adv |= ADVERTISE_1000XPAUSE; 3623 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 3624 advertising)) 3625 adv |= ADVERTISE_1000XPSE_ASYM; 3626 return adv; 3627 case PHY_INTERFACE_MODE_SGMII: 3628 case PHY_INTERFACE_MODE_QSGMII: 3629 return 0x0001; 3630 default: 3631 /* Nothing to do for other modes */ 3632 return -EINVAL; 3633 } 3634 } 3635 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_encode_advertisement); 3636 3637 /** 3638 * phylink_mii_c22_pcs_config() - configure clause 22 PCS 3639 * @pcs: a pointer to a &struct mdio_device. 3640 * @interface: the PHY interface mode being configured 3641 * @advertising: the ethtool advertisement mask 3642 * @neg_mode: PCS negotiation mode 3643 * 3644 * Configure a Clause 22 PCS PHY with the appropriate negotiation 3645 * parameters for the @mode, @interface and @advertising parameters. 3646 * Returns negative error number on failure, zero if the advertisement 3647 * has not changed, or positive if there is a change. 3648 */ 3649 int phylink_mii_c22_pcs_config(struct mdio_device *pcs, 3650 phy_interface_t interface, 3651 const unsigned long *advertising, 3652 unsigned int neg_mode) 3653 { 3654 bool changed = 0; 3655 u16 bmcr; 3656 int ret, adv; 3657 3658 adv = phylink_mii_c22_pcs_encode_advertisement(interface, advertising); 3659 if (adv >= 0) { 3660 ret = mdiobus_modify_changed(pcs->bus, pcs->addr, 3661 MII_ADVERTISE, 0xffff, adv); 3662 if (ret < 0) 3663 return ret; 3664 changed = ret; 3665 } 3666 3667 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) 3668 bmcr = BMCR_ANENABLE; 3669 else 3670 bmcr = 0; 3671 3672 /* Configure the inband state. Ensure ISOLATE bit is disabled */ 3673 ret = mdiodev_modify(pcs, MII_BMCR, BMCR_ANENABLE | BMCR_ISOLATE, bmcr); 3674 if (ret < 0) 3675 return ret; 3676 3677 return changed; 3678 } 3679 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config); 3680 3681 /** 3682 * phylink_mii_c22_pcs_an_restart() - restart 802.3z autonegotiation 3683 * @pcs: a pointer to a &struct mdio_device. 3684 * 3685 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 3686 * clause 37 negotiation. 3687 * 3688 * Restart the clause 37 negotiation with the link partner. This is 3689 * suitable to be directly plugged into the pcs_get_state() member 3690 * of the struct phylink_pcs_ops structure. 3691 */ 3692 void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs) 3693 { 3694 int val = mdiodev_read(pcs, MII_BMCR); 3695 3696 if (val >= 0) { 3697 val |= BMCR_ANRESTART; 3698 3699 mdiodev_write(pcs, MII_BMCR, val); 3700 } 3701 } 3702 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_an_restart); 3703 3704 void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs, 3705 struct phylink_link_state *state) 3706 { 3707 struct mii_bus *bus = pcs->bus; 3708 int addr = pcs->addr; 3709 int stat; 3710 3711 stat = mdiobus_c45_read(bus, addr, MDIO_MMD_PCS, MDIO_STAT1); 3712 if (stat < 0) { 3713 state->link = false; 3714 return; 3715 } 3716 3717 state->link = !!(stat & MDIO_STAT1_LSTATUS); 3718 if (!state->link) 3719 return; 3720 3721 switch (state->interface) { 3722 case PHY_INTERFACE_MODE_10GBASER: 3723 state->speed = SPEED_10000; 3724 state->duplex = DUPLEX_FULL; 3725 break; 3726 3727 default: 3728 break; 3729 } 3730 } 3731 EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state); 3732 3733 static int __init phylink_init(void) 3734 { 3735 for (int i = 0; i < ARRAY_SIZE(phylink_sfp_interface_preference); ++i) 3736 __set_bit(phylink_sfp_interface_preference[i], 3737 phylink_sfp_interfaces); 3738 3739 return 0; 3740 } 3741 3742 module_init(phylink_init); 3743 3744 MODULE_LICENSE("GPL v2"); 3745