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 link_failed; 82 83 struct sfp_bus *sfp_bus; 84 bool sfp_may_have_phy; 85 DECLARE_PHY_INTERFACE_MASK(sfp_interfaces); 86 __ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support); 87 u8 sfp_port; 88 }; 89 90 #define phylink_printk(level, pl, fmt, ...) \ 91 do { \ 92 if ((pl)->config->type == PHYLINK_NETDEV) \ 93 netdev_printk(level, (pl)->netdev, fmt, ##__VA_ARGS__); \ 94 else if ((pl)->config->type == PHYLINK_DEV) \ 95 dev_printk(level, (pl)->dev, fmt, ##__VA_ARGS__); \ 96 } while (0) 97 98 #define phylink_err(pl, fmt, ...) \ 99 phylink_printk(KERN_ERR, pl, fmt, ##__VA_ARGS__) 100 #define phylink_warn(pl, fmt, ...) \ 101 phylink_printk(KERN_WARNING, pl, fmt, ##__VA_ARGS__) 102 #define phylink_info(pl, fmt, ...) \ 103 phylink_printk(KERN_INFO, pl, fmt, ##__VA_ARGS__) 104 #if defined(CONFIG_DYNAMIC_DEBUG) 105 #define phylink_dbg(pl, fmt, ...) \ 106 do { \ 107 if ((pl)->config->type == PHYLINK_NETDEV) \ 108 netdev_dbg((pl)->netdev, fmt, ##__VA_ARGS__); \ 109 else if ((pl)->config->type == PHYLINK_DEV) \ 110 dev_dbg((pl)->dev, fmt, ##__VA_ARGS__); \ 111 } while (0) 112 #elif defined(DEBUG) 113 #define phylink_dbg(pl, fmt, ...) \ 114 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__) 115 #else 116 #define phylink_dbg(pl, fmt, ...) \ 117 ({ \ 118 if (0) \ 119 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__); \ 120 }) 121 #endif 122 123 static const phy_interface_t phylink_sfp_interface_preference[] = { 124 PHY_INTERFACE_MODE_25GBASER, 125 PHY_INTERFACE_MODE_USXGMII, 126 PHY_INTERFACE_MODE_10GBASER, 127 PHY_INTERFACE_MODE_5GBASER, 128 PHY_INTERFACE_MODE_2500BASEX, 129 PHY_INTERFACE_MODE_SGMII, 130 PHY_INTERFACE_MODE_1000BASEX, 131 PHY_INTERFACE_MODE_100BASEX, 132 }; 133 134 static DECLARE_PHY_INTERFACE_MASK(phylink_sfp_interfaces); 135 136 /** 137 * phylink_set_port_modes() - set the port type modes in the ethtool mask 138 * @mask: ethtool link mode mask 139 * 140 * Sets all the port type modes in the ethtool mask. MAC drivers should 141 * use this in their 'validate' callback. 142 */ 143 void phylink_set_port_modes(unsigned long *mask) 144 { 145 phylink_set(mask, TP); 146 phylink_set(mask, AUI); 147 phylink_set(mask, MII); 148 phylink_set(mask, FIBRE); 149 phylink_set(mask, BNC); 150 phylink_set(mask, Backplane); 151 } 152 EXPORT_SYMBOL_GPL(phylink_set_port_modes); 153 154 static int phylink_is_empty_linkmode(const unsigned long *linkmode) 155 { 156 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, }; 157 158 phylink_set_port_modes(tmp); 159 phylink_set(tmp, Autoneg); 160 phylink_set(tmp, Pause); 161 phylink_set(tmp, Asym_Pause); 162 163 return linkmode_subset(linkmode, tmp); 164 } 165 166 static const char *phylink_an_mode_str(unsigned int mode) 167 { 168 static const char *modestr[] = { 169 [MLO_AN_PHY] = "phy", 170 [MLO_AN_FIXED] = "fixed", 171 [MLO_AN_INBAND] = "inband", 172 }; 173 174 return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown"; 175 } 176 177 static unsigned int phylink_interface_signal_rate(phy_interface_t interface) 178 { 179 switch (interface) { 180 case PHY_INTERFACE_MODE_SGMII: 181 case PHY_INTERFACE_MODE_1000BASEX: /* 1.25Mbd */ 182 return 1250; 183 case PHY_INTERFACE_MODE_2500BASEX: /* 3.125Mbd */ 184 return 3125; 185 case PHY_INTERFACE_MODE_5GBASER: /* 5.15625Mbd */ 186 return 5156; 187 case PHY_INTERFACE_MODE_10GBASER: /* 10.3125Mbd */ 188 return 10313; 189 default: 190 return 0; 191 } 192 } 193 194 /** 195 * phylink_interface_max_speed() - get the maximum speed of a phy interface 196 * @interface: phy interface mode defined by &typedef phy_interface_t 197 * 198 * Determine the maximum speed of a phy interface. This is intended to help 199 * determine the correct speed to pass to the MAC when the phy is performing 200 * rate matching. 201 * 202 * Return: The maximum speed of @interface 203 */ 204 static int phylink_interface_max_speed(phy_interface_t interface) 205 { 206 switch (interface) { 207 case PHY_INTERFACE_MODE_100BASEX: 208 case PHY_INTERFACE_MODE_REVRMII: 209 case PHY_INTERFACE_MODE_RMII: 210 case PHY_INTERFACE_MODE_SMII: 211 case PHY_INTERFACE_MODE_REVMII: 212 case PHY_INTERFACE_MODE_MII: 213 return SPEED_100; 214 215 case PHY_INTERFACE_MODE_TBI: 216 case PHY_INTERFACE_MODE_MOCA: 217 case PHY_INTERFACE_MODE_RTBI: 218 case PHY_INTERFACE_MODE_1000BASEX: 219 case PHY_INTERFACE_MODE_1000BASEKX: 220 case PHY_INTERFACE_MODE_TRGMII: 221 case PHY_INTERFACE_MODE_RGMII_TXID: 222 case PHY_INTERFACE_MODE_RGMII_RXID: 223 case PHY_INTERFACE_MODE_RGMII_ID: 224 case PHY_INTERFACE_MODE_RGMII: 225 case PHY_INTERFACE_MODE_PSGMII: 226 case PHY_INTERFACE_MODE_QSGMII: 227 case PHY_INTERFACE_MODE_QUSGMII: 228 case PHY_INTERFACE_MODE_SGMII: 229 case PHY_INTERFACE_MODE_GMII: 230 return SPEED_1000; 231 232 case PHY_INTERFACE_MODE_2500BASEX: 233 case PHY_INTERFACE_MODE_10G_QXGMII: 234 return SPEED_2500; 235 236 case PHY_INTERFACE_MODE_5GBASER: 237 return SPEED_5000; 238 239 case PHY_INTERFACE_MODE_XGMII: 240 case PHY_INTERFACE_MODE_RXAUI: 241 case PHY_INTERFACE_MODE_XAUI: 242 case PHY_INTERFACE_MODE_10GBASER: 243 case PHY_INTERFACE_MODE_10GKR: 244 case PHY_INTERFACE_MODE_USXGMII: 245 return SPEED_10000; 246 247 case PHY_INTERFACE_MODE_25GBASER: 248 return SPEED_25000; 249 250 case PHY_INTERFACE_MODE_XLGMII: 251 return SPEED_40000; 252 253 case PHY_INTERFACE_MODE_INTERNAL: 254 case PHY_INTERFACE_MODE_NA: 255 case PHY_INTERFACE_MODE_MAX: 256 /* No idea! Garbage in, unknown out */ 257 return SPEED_UNKNOWN; 258 } 259 260 /* If we get here, someone forgot to add an interface mode above */ 261 WARN_ON_ONCE(1); 262 return SPEED_UNKNOWN; 263 } 264 265 /** 266 * phylink_caps_to_linkmodes() - Convert capabilities to ethtool link modes 267 * @linkmodes: ethtool linkmode mask (must be already initialised) 268 * @caps: bitmask of MAC capabilities 269 * 270 * Set all possible pause, speed and duplex linkmodes in @linkmodes that are 271 * supported by the @caps. @linkmodes must have been initialised previously. 272 */ 273 static void phylink_caps_to_linkmodes(unsigned long *linkmodes, 274 unsigned long caps) 275 { 276 if (caps & MAC_SYM_PAUSE) 277 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, linkmodes); 278 279 if (caps & MAC_ASYM_PAUSE) 280 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, linkmodes); 281 282 if (caps & MAC_10HD) { 283 __set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, linkmodes); 284 __set_bit(ETHTOOL_LINK_MODE_10baseT1S_Half_BIT, linkmodes); 285 __set_bit(ETHTOOL_LINK_MODE_10baseT1S_P2MP_Half_BIT, linkmodes); 286 } 287 288 if (caps & MAC_10FD) { 289 __set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, linkmodes); 290 __set_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT, linkmodes); 291 __set_bit(ETHTOOL_LINK_MODE_10baseT1S_Full_BIT, linkmodes); 292 } 293 294 if (caps & MAC_100HD) { 295 __set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, linkmodes); 296 __set_bit(ETHTOOL_LINK_MODE_100baseFX_Half_BIT, linkmodes); 297 } 298 299 if (caps & MAC_100FD) { 300 __set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, linkmodes); 301 __set_bit(ETHTOOL_LINK_MODE_100baseT1_Full_BIT, linkmodes); 302 __set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT, linkmodes); 303 } 304 305 if (caps & MAC_1000HD) 306 __set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, linkmodes); 307 308 if (caps & MAC_1000FD) { 309 __set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, linkmodes); 310 __set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, linkmodes); 311 __set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, linkmodes); 312 __set_bit(ETHTOOL_LINK_MODE_1000baseT1_Full_BIT, linkmodes); 313 } 314 315 if (caps & MAC_2500FD) { 316 __set_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, linkmodes); 317 __set_bit(ETHTOOL_LINK_MODE_2500baseX_Full_BIT, linkmodes); 318 } 319 320 if (caps & MAC_5000FD) 321 __set_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT, linkmodes); 322 323 if (caps & MAC_10000FD) { 324 __set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, linkmodes); 325 __set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, linkmodes); 326 __set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, linkmodes); 327 __set_bit(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT, linkmodes); 328 __set_bit(ETHTOOL_LINK_MODE_10000baseCR_Full_BIT, linkmodes); 329 __set_bit(ETHTOOL_LINK_MODE_10000baseSR_Full_BIT, linkmodes); 330 __set_bit(ETHTOOL_LINK_MODE_10000baseLR_Full_BIT, linkmodes); 331 __set_bit(ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT, linkmodes); 332 __set_bit(ETHTOOL_LINK_MODE_10000baseER_Full_BIT, linkmodes); 333 } 334 335 if (caps & MAC_25000FD) { 336 __set_bit(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT, linkmodes); 337 __set_bit(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT, linkmodes); 338 __set_bit(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT, linkmodes); 339 } 340 341 if (caps & MAC_40000FD) { 342 __set_bit(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT, linkmodes); 343 __set_bit(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT, linkmodes); 344 __set_bit(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT, linkmodes); 345 __set_bit(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT, linkmodes); 346 } 347 348 if (caps & MAC_50000FD) { 349 __set_bit(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT, linkmodes); 350 __set_bit(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT, linkmodes); 351 __set_bit(ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT, linkmodes); 352 __set_bit(ETHTOOL_LINK_MODE_50000baseKR_Full_BIT, linkmodes); 353 __set_bit(ETHTOOL_LINK_MODE_50000baseSR_Full_BIT, linkmodes); 354 __set_bit(ETHTOOL_LINK_MODE_50000baseCR_Full_BIT, linkmodes); 355 __set_bit(ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT, 356 linkmodes); 357 __set_bit(ETHTOOL_LINK_MODE_50000baseDR_Full_BIT, linkmodes); 358 } 359 360 if (caps & MAC_56000FD) { 361 __set_bit(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT, linkmodes); 362 __set_bit(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT, linkmodes); 363 __set_bit(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT, linkmodes); 364 __set_bit(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT, linkmodes); 365 } 366 367 if (caps & MAC_100000FD) { 368 __set_bit(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT, linkmodes); 369 __set_bit(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT, linkmodes); 370 __set_bit(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT, linkmodes); 371 __set_bit(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT, 372 linkmodes); 373 __set_bit(ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT, linkmodes); 374 __set_bit(ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT, linkmodes); 375 __set_bit(ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT, linkmodes); 376 __set_bit(ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT, 377 linkmodes); 378 __set_bit(ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT, linkmodes); 379 __set_bit(ETHTOOL_LINK_MODE_100000baseKR_Full_BIT, linkmodes); 380 __set_bit(ETHTOOL_LINK_MODE_100000baseSR_Full_BIT, linkmodes); 381 __set_bit(ETHTOOL_LINK_MODE_100000baseLR_ER_FR_Full_BIT, 382 linkmodes); 383 __set_bit(ETHTOOL_LINK_MODE_100000baseCR_Full_BIT, linkmodes); 384 __set_bit(ETHTOOL_LINK_MODE_100000baseDR_Full_BIT, linkmodes); 385 } 386 387 if (caps & MAC_200000FD) { 388 __set_bit(ETHTOOL_LINK_MODE_200000baseKR4_Full_BIT, linkmodes); 389 __set_bit(ETHTOOL_LINK_MODE_200000baseSR4_Full_BIT, linkmodes); 390 __set_bit(ETHTOOL_LINK_MODE_200000baseLR4_ER4_FR4_Full_BIT, 391 linkmodes); 392 __set_bit(ETHTOOL_LINK_MODE_200000baseDR4_Full_BIT, linkmodes); 393 __set_bit(ETHTOOL_LINK_MODE_200000baseCR4_Full_BIT, linkmodes); 394 __set_bit(ETHTOOL_LINK_MODE_200000baseKR2_Full_BIT, linkmodes); 395 __set_bit(ETHTOOL_LINK_MODE_200000baseSR2_Full_BIT, linkmodes); 396 __set_bit(ETHTOOL_LINK_MODE_200000baseLR2_ER2_FR2_Full_BIT, 397 linkmodes); 398 __set_bit(ETHTOOL_LINK_MODE_200000baseDR2_Full_BIT, linkmodes); 399 __set_bit(ETHTOOL_LINK_MODE_200000baseCR2_Full_BIT, linkmodes); 400 } 401 402 if (caps & MAC_400000FD) { 403 __set_bit(ETHTOOL_LINK_MODE_400000baseKR8_Full_BIT, linkmodes); 404 __set_bit(ETHTOOL_LINK_MODE_400000baseSR8_Full_BIT, linkmodes); 405 __set_bit(ETHTOOL_LINK_MODE_400000baseLR8_ER8_FR8_Full_BIT, 406 linkmodes); 407 __set_bit(ETHTOOL_LINK_MODE_400000baseDR8_Full_BIT, linkmodes); 408 __set_bit(ETHTOOL_LINK_MODE_400000baseCR8_Full_BIT, linkmodes); 409 __set_bit(ETHTOOL_LINK_MODE_400000baseKR4_Full_BIT, linkmodes); 410 __set_bit(ETHTOOL_LINK_MODE_400000baseSR4_Full_BIT, linkmodes); 411 __set_bit(ETHTOOL_LINK_MODE_400000baseLR4_ER4_FR4_Full_BIT, 412 linkmodes); 413 __set_bit(ETHTOOL_LINK_MODE_400000baseDR4_Full_BIT, linkmodes); 414 __set_bit(ETHTOOL_LINK_MODE_400000baseCR4_Full_BIT, linkmodes); 415 } 416 } 417 418 static struct { 419 unsigned long mask; 420 int speed; 421 unsigned int duplex; 422 } phylink_caps_params[] = { 423 { MAC_400000FD, SPEED_400000, DUPLEX_FULL }, 424 { MAC_200000FD, SPEED_200000, DUPLEX_FULL }, 425 { MAC_100000FD, SPEED_100000, DUPLEX_FULL }, 426 { MAC_56000FD, SPEED_56000, DUPLEX_FULL }, 427 { MAC_50000FD, SPEED_50000, DUPLEX_FULL }, 428 { MAC_40000FD, SPEED_40000, DUPLEX_FULL }, 429 { MAC_25000FD, SPEED_25000, DUPLEX_FULL }, 430 { MAC_20000FD, SPEED_20000, DUPLEX_FULL }, 431 { MAC_10000FD, SPEED_10000, DUPLEX_FULL }, 432 { MAC_5000FD, SPEED_5000, DUPLEX_FULL }, 433 { MAC_2500FD, SPEED_2500, DUPLEX_FULL }, 434 { MAC_1000FD, SPEED_1000, DUPLEX_FULL }, 435 { MAC_1000HD, SPEED_1000, DUPLEX_HALF }, 436 { MAC_100FD, SPEED_100, DUPLEX_FULL }, 437 { MAC_100HD, SPEED_100, DUPLEX_HALF }, 438 { MAC_10FD, SPEED_10, DUPLEX_FULL }, 439 { MAC_10HD, SPEED_10, DUPLEX_HALF }, 440 }; 441 442 /** 443 * phylink_limit_mac_speed - limit the phylink_config to a maximum speed 444 * @config: pointer to a &struct phylink_config 445 * @max_speed: maximum speed 446 * 447 * Mask off MAC capabilities for speeds higher than the @max_speed parameter. 448 * Any further motifications of config.mac_capabilities will override this. 449 */ 450 void phylink_limit_mac_speed(struct phylink_config *config, u32 max_speed) 451 { 452 int i; 453 454 for (i = 0; i < ARRAY_SIZE(phylink_caps_params) && 455 phylink_caps_params[i].speed > max_speed; i++) 456 config->mac_capabilities &= ~phylink_caps_params[i].mask; 457 } 458 EXPORT_SYMBOL_GPL(phylink_limit_mac_speed); 459 460 /** 461 * phylink_cap_from_speed_duplex - Get mac capability from speed/duplex 462 * @speed: the speed to search for 463 * @duplex: the duplex to search for 464 * 465 * Find the mac capability for a given speed and duplex. 466 * 467 * Return: A mask with the mac capability patching @speed and @duplex, or 0 if 468 * there were no matches. 469 */ 470 static unsigned long phylink_cap_from_speed_duplex(int speed, 471 unsigned int duplex) 472 { 473 int i; 474 475 for (i = 0; i < ARRAY_SIZE(phylink_caps_params); i++) { 476 if (speed == phylink_caps_params[i].speed && 477 duplex == phylink_caps_params[i].duplex) 478 return phylink_caps_params[i].mask; 479 } 480 481 return 0; 482 } 483 484 /** 485 * phylink_get_capabilities() - get capabilities for a given MAC 486 * @interface: phy interface mode defined by &typedef phy_interface_t 487 * @mac_capabilities: bitmask of MAC capabilities 488 * @rate_matching: type of rate matching being performed 489 * 490 * Get the MAC capabilities that are supported by the @interface mode and 491 * @mac_capabilities. 492 */ 493 static unsigned long phylink_get_capabilities(phy_interface_t interface, 494 unsigned long mac_capabilities, 495 int rate_matching) 496 { 497 int max_speed = phylink_interface_max_speed(interface); 498 unsigned long caps = MAC_SYM_PAUSE | MAC_ASYM_PAUSE; 499 unsigned long matched_caps = 0; 500 501 switch (interface) { 502 case PHY_INTERFACE_MODE_USXGMII: 503 caps |= MAC_10000FD | MAC_5000FD; 504 fallthrough; 505 506 case PHY_INTERFACE_MODE_10G_QXGMII: 507 caps |= MAC_2500FD; 508 fallthrough; 509 510 case PHY_INTERFACE_MODE_RGMII_TXID: 511 case PHY_INTERFACE_MODE_RGMII_RXID: 512 case PHY_INTERFACE_MODE_RGMII_ID: 513 case PHY_INTERFACE_MODE_RGMII: 514 case PHY_INTERFACE_MODE_PSGMII: 515 case PHY_INTERFACE_MODE_QSGMII: 516 case PHY_INTERFACE_MODE_QUSGMII: 517 case PHY_INTERFACE_MODE_SGMII: 518 case PHY_INTERFACE_MODE_GMII: 519 caps |= MAC_1000HD | MAC_1000FD; 520 fallthrough; 521 522 case PHY_INTERFACE_MODE_REVRMII: 523 case PHY_INTERFACE_MODE_RMII: 524 case PHY_INTERFACE_MODE_SMII: 525 case PHY_INTERFACE_MODE_REVMII: 526 case PHY_INTERFACE_MODE_MII: 527 caps |= MAC_10HD | MAC_10FD; 528 fallthrough; 529 530 case PHY_INTERFACE_MODE_100BASEX: 531 caps |= MAC_100HD | MAC_100FD; 532 break; 533 534 case PHY_INTERFACE_MODE_TBI: 535 case PHY_INTERFACE_MODE_MOCA: 536 case PHY_INTERFACE_MODE_RTBI: 537 case PHY_INTERFACE_MODE_1000BASEX: 538 caps |= MAC_1000HD; 539 fallthrough; 540 case PHY_INTERFACE_MODE_1000BASEKX: 541 case PHY_INTERFACE_MODE_TRGMII: 542 caps |= MAC_1000FD; 543 break; 544 545 case PHY_INTERFACE_MODE_2500BASEX: 546 caps |= MAC_2500FD; 547 break; 548 549 case PHY_INTERFACE_MODE_5GBASER: 550 caps |= MAC_5000FD; 551 break; 552 553 case PHY_INTERFACE_MODE_XGMII: 554 case PHY_INTERFACE_MODE_RXAUI: 555 case PHY_INTERFACE_MODE_XAUI: 556 case PHY_INTERFACE_MODE_10GBASER: 557 case PHY_INTERFACE_MODE_10GKR: 558 caps |= MAC_10000FD; 559 break; 560 561 case PHY_INTERFACE_MODE_25GBASER: 562 caps |= MAC_25000FD; 563 break; 564 565 case PHY_INTERFACE_MODE_XLGMII: 566 caps |= MAC_40000FD; 567 break; 568 569 case PHY_INTERFACE_MODE_INTERNAL: 570 caps |= ~0; 571 break; 572 573 case PHY_INTERFACE_MODE_NA: 574 case PHY_INTERFACE_MODE_MAX: 575 break; 576 } 577 578 switch (rate_matching) { 579 case RATE_MATCH_OPEN_LOOP: 580 /* TODO */ 581 fallthrough; 582 case RATE_MATCH_NONE: 583 matched_caps = 0; 584 break; 585 case RATE_MATCH_PAUSE: { 586 /* The MAC must support asymmetric pause towards the local 587 * device for this. We could allow just symmetric pause, but 588 * then we might have to renegotiate if the link partner 589 * doesn't support pause. This is because there's no way to 590 * accept pause frames without transmitting them if we only 591 * support symmetric pause. 592 */ 593 if (!(mac_capabilities & MAC_SYM_PAUSE) || 594 !(mac_capabilities & MAC_ASYM_PAUSE)) 595 break; 596 597 /* We can't adapt if the MAC doesn't support the interface's 598 * max speed at full duplex. 599 */ 600 if (mac_capabilities & 601 phylink_cap_from_speed_duplex(max_speed, DUPLEX_FULL)) 602 matched_caps = GENMASK(__fls(caps), __fls(MAC_10HD)); 603 break; 604 } 605 case RATE_MATCH_CRS: 606 /* The MAC must support half duplex at the interface's max 607 * speed. 608 */ 609 if (mac_capabilities & 610 phylink_cap_from_speed_duplex(max_speed, DUPLEX_HALF)) { 611 matched_caps = GENMASK(__fls(caps), __fls(MAC_10HD)); 612 matched_caps &= mac_capabilities; 613 } 614 break; 615 } 616 617 return (caps & mac_capabilities) | matched_caps; 618 } 619 620 /** 621 * phylink_validate_mask_caps() - Restrict link modes based on caps 622 * @supported: ethtool bitmask for supported link modes. 623 * @state: pointer to a &struct phylink_link_state. 624 * @mac_capabilities: bitmask of MAC capabilities 625 * 626 * Calculate the supported link modes based on @mac_capabilities, and restrict 627 * @supported and @state based on that. Use this function if your capabiliies 628 * aren't constant, such as if they vary depending on the interface. 629 */ 630 static void phylink_validate_mask_caps(unsigned long *supported, 631 struct phylink_link_state *state, 632 unsigned long mac_capabilities) 633 { 634 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; 635 unsigned long caps; 636 637 phylink_set_port_modes(mask); 638 phylink_set(mask, Autoneg); 639 caps = phylink_get_capabilities(state->interface, mac_capabilities, 640 state->rate_matching); 641 phylink_caps_to_linkmodes(mask, caps); 642 643 linkmode_and(supported, supported, mask); 644 linkmode_and(state->advertising, state->advertising, mask); 645 } 646 647 static int phylink_validate_mac_and_pcs(struct phylink *pl, 648 unsigned long *supported, 649 struct phylink_link_state *state) 650 { 651 struct phylink_pcs *pcs = NULL; 652 unsigned long capabilities; 653 int ret; 654 655 /* Get the PCS for this interface mode */ 656 if (pl->mac_ops->mac_select_pcs) { 657 pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface); 658 if (IS_ERR(pcs)) 659 return PTR_ERR(pcs); 660 } 661 662 if (pcs) { 663 /* The PCS, if present, must be setup before phylink_create() 664 * has been called. If the ops is not initialised, print an 665 * error and backtrace rather than oopsing the kernel. 666 */ 667 if (!pcs->ops) { 668 phylink_err(pl, "interface %s: uninitialised PCS\n", 669 phy_modes(state->interface)); 670 dump_stack(); 671 return -EINVAL; 672 } 673 674 /* Validate the link parameters with the PCS */ 675 if (pcs->ops->pcs_validate) { 676 ret = pcs->ops->pcs_validate(pcs, supported, state); 677 if (ret < 0 || phylink_is_empty_linkmode(supported)) 678 return -EINVAL; 679 680 /* Ensure the advertising mask is a subset of the 681 * supported mask. 682 */ 683 linkmode_and(state->advertising, state->advertising, 684 supported); 685 } 686 } 687 688 /* Then validate the link parameters with the MAC */ 689 if (pl->mac_ops->mac_get_caps) 690 capabilities = pl->mac_ops->mac_get_caps(pl->config, 691 state->interface); 692 else 693 capabilities = pl->config->mac_capabilities; 694 695 phylink_validate_mask_caps(supported, state, capabilities); 696 697 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; 698 } 699 700 static void phylink_validate_one(struct phylink *pl, struct phy_device *phy, 701 const unsigned long *supported, 702 const struct phylink_link_state *state, 703 phy_interface_t interface, 704 unsigned long *accum_supported, 705 unsigned long *accum_advertising) 706 { 707 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp_supported); 708 struct phylink_link_state tmp_state; 709 710 linkmode_copy(tmp_supported, supported); 711 712 tmp_state = *state; 713 tmp_state.interface = interface; 714 715 if (phy) 716 tmp_state.rate_matching = phy_get_rate_matching(phy, interface); 717 718 if (!phylink_validate_mac_and_pcs(pl, tmp_supported, &tmp_state)) { 719 phylink_dbg(pl, " interface %u (%s) rate match %s supports %*pbl\n", 720 interface, phy_modes(interface), 721 phy_rate_matching_to_str(tmp_state.rate_matching), 722 __ETHTOOL_LINK_MODE_MASK_NBITS, tmp_supported); 723 724 linkmode_or(accum_supported, accum_supported, tmp_supported); 725 linkmode_or(accum_advertising, accum_advertising, 726 tmp_state.advertising); 727 } 728 } 729 730 static int phylink_validate_mask(struct phylink *pl, struct phy_device *phy, 731 unsigned long *supported, 732 struct phylink_link_state *state, 733 const unsigned long *interfaces) 734 { 735 __ETHTOOL_DECLARE_LINK_MODE_MASK(all_adv) = { 0, }; 736 __ETHTOOL_DECLARE_LINK_MODE_MASK(all_s) = { 0, }; 737 int interface; 738 739 for_each_set_bit(interface, interfaces, PHY_INTERFACE_MODE_MAX) 740 phylink_validate_one(pl, phy, supported, state, interface, 741 all_s, all_adv); 742 743 linkmode_copy(supported, all_s); 744 linkmode_copy(state->advertising, all_adv); 745 746 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; 747 } 748 749 static int phylink_validate(struct phylink *pl, unsigned long *supported, 750 struct phylink_link_state *state) 751 { 752 const unsigned long *interfaces = pl->config->supported_interfaces; 753 754 if (state->interface == PHY_INTERFACE_MODE_NA) 755 return phylink_validate_mask(pl, NULL, supported, state, 756 interfaces); 757 758 if (!test_bit(state->interface, interfaces)) 759 return -EINVAL; 760 761 return phylink_validate_mac_and_pcs(pl, supported, state); 762 } 763 764 static int phylink_parse_fixedlink(struct phylink *pl, 765 const struct fwnode_handle *fwnode) 766 { 767 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; 768 struct fwnode_handle *fixed_node; 769 const struct phy_setting *s; 770 struct gpio_desc *desc; 771 u32 speed; 772 int ret; 773 774 fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link"); 775 if (fixed_node) { 776 ret = fwnode_property_read_u32(fixed_node, "speed", &speed); 777 778 pl->link_config.speed = speed; 779 pl->link_config.duplex = DUPLEX_HALF; 780 781 if (fwnode_property_read_bool(fixed_node, "full-duplex")) 782 pl->link_config.duplex = DUPLEX_FULL; 783 784 /* We treat the "pause" and "asym-pause" terminology as 785 * defining the link partner's ability. 786 */ 787 if (fwnode_property_read_bool(fixed_node, "pause")) 788 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 789 pl->link_config.lp_advertising); 790 if (fwnode_property_read_bool(fixed_node, "asym-pause")) 791 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 792 pl->link_config.lp_advertising); 793 794 if (ret == 0) { 795 desc = fwnode_gpiod_get_index(fixed_node, "link", 0, 796 GPIOD_IN, "?"); 797 798 if (!IS_ERR(desc)) 799 pl->link_gpio = desc; 800 else if (desc == ERR_PTR(-EPROBE_DEFER)) 801 ret = -EPROBE_DEFER; 802 } 803 fwnode_handle_put(fixed_node); 804 805 if (ret) 806 return ret; 807 } else { 808 u32 prop[5]; 809 810 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 811 NULL, 0); 812 if (ret != ARRAY_SIZE(prop)) { 813 phylink_err(pl, "broken fixed-link?\n"); 814 return -EINVAL; 815 } 816 817 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 818 prop, ARRAY_SIZE(prop)); 819 if (!ret) { 820 pl->link_config.duplex = prop[1] ? 821 DUPLEX_FULL : DUPLEX_HALF; 822 pl->link_config.speed = prop[2]; 823 if (prop[3]) 824 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 825 pl->link_config.lp_advertising); 826 if (prop[4]) 827 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 828 pl->link_config.lp_advertising); 829 } 830 } 831 832 if (pl->link_config.speed > SPEED_1000 && 833 pl->link_config.duplex != DUPLEX_FULL) 834 phylink_warn(pl, "fixed link specifies half duplex for %dMbps link?\n", 835 pl->link_config.speed); 836 837 linkmode_fill(pl->supported); 838 linkmode_copy(pl->link_config.advertising, pl->supported); 839 phylink_validate(pl, pl->supported, &pl->link_config); 840 841 s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex, 842 pl->supported, true); 843 844 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, mask); 845 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, mask); 846 linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, mask); 847 linkmode_and(pl->supported, pl->supported, mask); 848 849 phylink_set(pl->supported, MII); 850 851 if (s) { 852 __set_bit(s->bit, pl->supported); 853 __set_bit(s->bit, pl->link_config.lp_advertising); 854 } else { 855 phylink_warn(pl, "fixed link %s duplex %dMbps not recognised\n", 856 pl->link_config.duplex == DUPLEX_FULL ? "full" : "half", 857 pl->link_config.speed); 858 } 859 860 linkmode_and(pl->link_config.advertising, pl->link_config.advertising, 861 pl->supported); 862 863 pl->link_config.link = 1; 864 pl->link_config.an_complete = 1; 865 866 return 0; 867 } 868 869 static int phylink_parse_mode(struct phylink *pl, 870 const struct fwnode_handle *fwnode) 871 { 872 struct fwnode_handle *dn; 873 const char *managed; 874 unsigned long caps; 875 876 if (pl->config->default_an_inband) 877 pl->cfg_link_an_mode = MLO_AN_INBAND; 878 879 dn = fwnode_get_named_child_node(fwnode, "fixed-link"); 880 if (dn || fwnode_property_present(fwnode, "fixed-link")) 881 pl->cfg_link_an_mode = MLO_AN_FIXED; 882 fwnode_handle_put(dn); 883 884 if ((fwnode_property_read_string(fwnode, "managed", &managed) == 0 && 885 strcmp(managed, "in-band-status") == 0)) { 886 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 887 phylink_err(pl, 888 "can't use both fixed-link and in-band-status\n"); 889 return -EINVAL; 890 } 891 892 pl->cfg_link_an_mode = MLO_AN_INBAND; 893 } 894 895 if (pl->cfg_link_an_mode == MLO_AN_INBAND) { 896 linkmode_zero(pl->supported); 897 phylink_set(pl->supported, MII); 898 phylink_set(pl->supported, Autoneg); 899 phylink_set(pl->supported, Asym_Pause); 900 phylink_set(pl->supported, Pause); 901 902 switch (pl->link_config.interface) { 903 case PHY_INTERFACE_MODE_SGMII: 904 case PHY_INTERFACE_MODE_PSGMII: 905 case PHY_INTERFACE_MODE_QSGMII: 906 case PHY_INTERFACE_MODE_QUSGMII: 907 case PHY_INTERFACE_MODE_RGMII: 908 case PHY_INTERFACE_MODE_RGMII_ID: 909 case PHY_INTERFACE_MODE_RGMII_RXID: 910 case PHY_INTERFACE_MODE_RGMII_TXID: 911 case PHY_INTERFACE_MODE_RTBI: 912 case PHY_INTERFACE_MODE_1000BASEX: 913 case PHY_INTERFACE_MODE_2500BASEX: 914 case PHY_INTERFACE_MODE_5GBASER: 915 case PHY_INTERFACE_MODE_25GBASER: 916 case PHY_INTERFACE_MODE_USXGMII: 917 case PHY_INTERFACE_MODE_10G_QXGMII: 918 case PHY_INTERFACE_MODE_10GKR: 919 case PHY_INTERFACE_MODE_10GBASER: 920 case PHY_INTERFACE_MODE_XLGMII: 921 caps = ~(MAC_SYM_PAUSE | MAC_ASYM_PAUSE); 922 caps = phylink_get_capabilities(pl->link_config.interface, caps, 923 RATE_MATCH_NONE); 924 phylink_caps_to_linkmodes(pl->supported, caps); 925 break; 926 927 default: 928 phylink_err(pl, 929 "incorrect link mode %s for in-band status\n", 930 phy_modes(pl->link_config.interface)); 931 return -EINVAL; 932 } 933 934 linkmode_copy(pl->link_config.advertising, pl->supported); 935 936 if (phylink_validate(pl, pl->supported, &pl->link_config)) { 937 phylink_err(pl, 938 "failed to validate link configuration for in-band status\n"); 939 return -EINVAL; 940 } 941 } 942 943 return 0; 944 } 945 946 static void phylink_apply_manual_flow(struct phylink *pl, 947 struct phylink_link_state *state) 948 { 949 /* If autoneg is disabled, pause AN is also disabled */ 950 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 951 state->advertising)) 952 state->pause &= ~MLO_PAUSE_AN; 953 954 /* Manual configuration of pause modes */ 955 if (!(pl->link_config.pause & MLO_PAUSE_AN)) 956 state->pause = pl->link_config.pause; 957 } 958 959 static void phylink_resolve_an_pause(struct phylink_link_state *state) 960 { 961 bool tx_pause, rx_pause; 962 963 if (state->duplex == DUPLEX_FULL) { 964 linkmode_resolve_pause(state->advertising, 965 state->lp_advertising, 966 &tx_pause, &rx_pause); 967 if (tx_pause) 968 state->pause |= MLO_PAUSE_TX; 969 if (rx_pause) 970 state->pause |= MLO_PAUSE_RX; 971 } 972 } 973 974 static void phylink_pcs_pre_config(struct phylink_pcs *pcs, 975 phy_interface_t interface) 976 { 977 if (pcs && pcs->ops->pcs_pre_config) 978 pcs->ops->pcs_pre_config(pcs, interface); 979 } 980 981 static int phylink_pcs_post_config(struct phylink_pcs *pcs, 982 phy_interface_t interface) 983 { 984 int err = 0; 985 986 if (pcs && pcs->ops->pcs_post_config) 987 err = pcs->ops->pcs_post_config(pcs, interface); 988 989 return err; 990 } 991 992 static void phylink_pcs_disable(struct phylink_pcs *pcs) 993 { 994 if (pcs && pcs->ops->pcs_disable) 995 pcs->ops->pcs_disable(pcs); 996 } 997 998 static int phylink_pcs_enable(struct phylink_pcs *pcs) 999 { 1000 int err = 0; 1001 1002 if (pcs && pcs->ops->pcs_enable) 1003 err = pcs->ops->pcs_enable(pcs); 1004 1005 return err; 1006 } 1007 1008 static int phylink_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode, 1009 const struct phylink_link_state *state, 1010 bool permit_pause_to_mac) 1011 { 1012 if (!pcs) 1013 return 0; 1014 1015 return pcs->ops->pcs_config(pcs, neg_mode, state->interface, 1016 state->advertising, permit_pause_to_mac); 1017 } 1018 1019 static void phylink_pcs_link_up(struct phylink_pcs *pcs, unsigned int neg_mode, 1020 phy_interface_t interface, int speed, 1021 int duplex) 1022 { 1023 if (pcs && pcs->ops->pcs_link_up) 1024 pcs->ops->pcs_link_up(pcs, neg_mode, interface, speed, duplex); 1025 } 1026 1027 static void phylink_pcs_poll_stop(struct phylink *pl) 1028 { 1029 if (pl->cfg_link_an_mode == MLO_AN_INBAND) 1030 del_timer(&pl->link_poll); 1031 } 1032 1033 static void phylink_pcs_poll_start(struct phylink *pl) 1034 { 1035 if (pl->pcs && pl->pcs->poll && pl->cfg_link_an_mode == MLO_AN_INBAND) 1036 mod_timer(&pl->link_poll, jiffies + HZ); 1037 } 1038 1039 int phylink_pcs_pre_init(struct phylink *pl, struct phylink_pcs *pcs) 1040 { 1041 int ret = 0; 1042 1043 /* Signal to PCS driver that MAC requires RX clock for init */ 1044 if (pl->config->mac_requires_rxc) 1045 pcs->rxc_always_on = true; 1046 1047 if (pcs->ops->pcs_pre_init) 1048 ret = pcs->ops->pcs_pre_init(pcs); 1049 1050 return ret; 1051 } 1052 EXPORT_SYMBOL_GPL(phylink_pcs_pre_init); 1053 1054 static void phylink_mac_config(struct phylink *pl, 1055 const struct phylink_link_state *state) 1056 { 1057 struct phylink_link_state st = *state; 1058 1059 /* Stop drivers incorrectly using these */ 1060 linkmode_zero(st.lp_advertising); 1061 st.speed = SPEED_UNKNOWN; 1062 st.duplex = DUPLEX_UNKNOWN; 1063 st.an_complete = false; 1064 st.link = false; 1065 1066 phylink_dbg(pl, 1067 "%s: mode=%s/%s/%s adv=%*pb pause=%02x\n", 1068 __func__, phylink_an_mode_str(pl->cur_link_an_mode), 1069 phy_modes(st.interface), 1070 phy_rate_matching_to_str(st.rate_matching), 1071 __ETHTOOL_LINK_MODE_MASK_NBITS, st.advertising, 1072 st.pause); 1073 1074 pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, &st); 1075 } 1076 1077 static void phylink_pcs_an_restart(struct phylink *pl) 1078 { 1079 if (pl->pcs && linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 1080 pl->link_config.advertising) && 1081 phy_interface_mode_is_8023z(pl->link_config.interface) && 1082 phylink_autoneg_inband(pl->cur_link_an_mode)) 1083 pl->pcs->ops->pcs_an_restart(pl->pcs); 1084 } 1085 1086 /** 1087 * phylink_pcs_neg_mode() - helper to determine PCS inband mode 1088 * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND. 1089 * @interface: interface mode to be used 1090 * @advertising: adertisement ethtool link mode mask 1091 * 1092 * Determines the negotiation mode to be used by the PCS, and returns 1093 * one of: 1094 * 1095 * - %PHYLINK_PCS_NEG_NONE: interface mode does not support inband 1096 * - %PHYLINK_PCS_NEG_OUTBAND: an out of band mode (e.g. reading the PHY) 1097 * will be used. 1098 * - %PHYLINK_PCS_NEG_INBAND_DISABLED: inband mode selected but autoneg 1099 * disabled 1100 * - %PHYLINK_PCS_NEG_INBAND_ENABLED: inband mode selected and autoneg enabled 1101 * 1102 * Note: this is for cases where the PCS itself is involved in negotiation 1103 * (e.g. Clause 37, SGMII and similar) not Clause 73. 1104 */ 1105 static unsigned int phylink_pcs_neg_mode(unsigned int mode, 1106 phy_interface_t interface, 1107 const unsigned long *advertising) 1108 { 1109 unsigned int neg_mode; 1110 1111 switch (interface) { 1112 case PHY_INTERFACE_MODE_SGMII: 1113 case PHY_INTERFACE_MODE_QSGMII: 1114 case PHY_INTERFACE_MODE_QUSGMII: 1115 case PHY_INTERFACE_MODE_USXGMII: 1116 case PHY_INTERFACE_MODE_10G_QXGMII: 1117 /* These protocols are designed for use with a PHY which 1118 * communicates its negotiation result back to the MAC via 1119 * inband communication. Note: there exist PHYs that run 1120 * with SGMII but do not send the inband data. 1121 */ 1122 if (!phylink_autoneg_inband(mode)) 1123 neg_mode = PHYLINK_PCS_NEG_OUTBAND; 1124 else 1125 neg_mode = PHYLINK_PCS_NEG_INBAND_ENABLED; 1126 break; 1127 1128 case PHY_INTERFACE_MODE_1000BASEX: 1129 case PHY_INTERFACE_MODE_2500BASEX: 1130 /* 1000base-X is designed for use media-side for Fibre 1131 * connections, and thus the Autoneg bit needs to be 1132 * taken into account. We also do this for 2500base-X 1133 * as well, but drivers may not support this, so may 1134 * need to override this. 1135 */ 1136 if (!phylink_autoneg_inband(mode)) 1137 neg_mode = PHYLINK_PCS_NEG_OUTBAND; 1138 else if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 1139 advertising)) 1140 neg_mode = PHYLINK_PCS_NEG_INBAND_ENABLED; 1141 else 1142 neg_mode = PHYLINK_PCS_NEG_INBAND_DISABLED; 1143 break; 1144 1145 default: 1146 neg_mode = PHYLINK_PCS_NEG_NONE; 1147 break; 1148 } 1149 1150 return neg_mode; 1151 } 1152 1153 static void phylink_major_config(struct phylink *pl, bool restart, 1154 const struct phylink_link_state *state) 1155 { 1156 struct phylink_pcs *pcs = NULL; 1157 bool pcs_changed = false; 1158 unsigned int rate_kbd; 1159 unsigned int neg_mode; 1160 int err; 1161 1162 phylink_dbg(pl, "major config %s\n", phy_modes(state->interface)); 1163 1164 pl->pcs_neg_mode = phylink_pcs_neg_mode(pl->cur_link_an_mode, 1165 state->interface, 1166 state->advertising); 1167 1168 if (pl->mac_ops->mac_select_pcs) { 1169 pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface); 1170 if (IS_ERR(pcs)) { 1171 phylink_err(pl, 1172 "mac_select_pcs unexpectedly failed: %pe\n", 1173 pcs); 1174 return; 1175 } 1176 1177 pcs_changed = pl->pcs != pcs; 1178 } 1179 1180 phylink_pcs_poll_stop(pl); 1181 1182 if (pl->mac_ops->mac_prepare) { 1183 err = pl->mac_ops->mac_prepare(pl->config, pl->cur_link_an_mode, 1184 state->interface); 1185 if (err < 0) { 1186 phylink_err(pl, "mac_prepare failed: %pe\n", 1187 ERR_PTR(err)); 1188 return; 1189 } 1190 } 1191 1192 /* If we have a new PCS, switch to the new PCS after preparing the MAC 1193 * for the change. 1194 */ 1195 if (pcs_changed) { 1196 phylink_pcs_disable(pl->pcs); 1197 1198 if (pl->pcs) 1199 pl->pcs->phylink = NULL; 1200 1201 pcs->phylink = pl; 1202 1203 pl->pcs = pcs; 1204 } 1205 1206 if (pl->pcs) 1207 phylink_pcs_pre_config(pl->pcs, state->interface); 1208 1209 phylink_mac_config(pl, state); 1210 1211 if (pl->pcs) 1212 phylink_pcs_post_config(pl->pcs, state->interface); 1213 1214 if (pl->pcs_state == PCS_STATE_STARTING || pcs_changed) 1215 phylink_pcs_enable(pl->pcs); 1216 1217 neg_mode = pl->cur_link_an_mode; 1218 if (pl->pcs && pl->pcs->neg_mode) 1219 neg_mode = pl->pcs_neg_mode; 1220 1221 err = phylink_pcs_config(pl->pcs, neg_mode, state, 1222 !!(pl->link_config.pause & MLO_PAUSE_AN)); 1223 if (err < 0) 1224 phylink_err(pl, "pcs_config failed: %pe\n", 1225 ERR_PTR(err)); 1226 else if (err > 0) 1227 restart = true; 1228 1229 if (restart) 1230 phylink_pcs_an_restart(pl); 1231 1232 if (pl->mac_ops->mac_finish) { 1233 err = pl->mac_ops->mac_finish(pl->config, pl->cur_link_an_mode, 1234 state->interface); 1235 if (err < 0) 1236 phylink_err(pl, "mac_finish failed: %pe\n", 1237 ERR_PTR(err)); 1238 } 1239 1240 if (pl->sfp_bus) { 1241 rate_kbd = phylink_interface_signal_rate(state->interface); 1242 if (rate_kbd) 1243 sfp_upstream_set_signal_rate(pl->sfp_bus, rate_kbd); 1244 } 1245 1246 phylink_pcs_poll_start(pl); 1247 } 1248 1249 /* 1250 * Reconfigure for a change of inband advertisement. 1251 * If we have a separate PCS, we only need to call its pcs_config() method, 1252 * and then restart AN if it indicates something changed. Otherwise, we do 1253 * the full MAC reconfiguration. 1254 */ 1255 static int phylink_change_inband_advert(struct phylink *pl) 1256 { 1257 unsigned int neg_mode; 1258 int ret; 1259 1260 if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) 1261 return 0; 1262 1263 phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__, 1264 phylink_an_mode_str(pl->cur_link_an_mode), 1265 phy_modes(pl->link_config.interface), 1266 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->link_config.advertising, 1267 pl->link_config.pause); 1268 1269 /* Recompute the PCS neg mode */ 1270 pl->pcs_neg_mode = phylink_pcs_neg_mode(pl->cur_link_an_mode, 1271 pl->link_config.interface, 1272 pl->link_config.advertising); 1273 1274 neg_mode = pl->cur_link_an_mode; 1275 if (pl->pcs->neg_mode) 1276 neg_mode = pl->pcs_neg_mode; 1277 1278 /* Modern PCS-based method; update the advert at the PCS, and 1279 * restart negotiation if the pcs_config() helper indicates that 1280 * the programmed advertisement has changed. 1281 */ 1282 ret = phylink_pcs_config(pl->pcs, neg_mode, &pl->link_config, 1283 !!(pl->link_config.pause & MLO_PAUSE_AN)); 1284 if (ret < 0) 1285 return ret; 1286 1287 if (ret > 0) 1288 phylink_pcs_an_restart(pl); 1289 1290 return 0; 1291 } 1292 1293 static void phylink_mac_pcs_get_state(struct phylink *pl, 1294 struct phylink_link_state *state) 1295 { 1296 linkmode_copy(state->advertising, pl->link_config.advertising); 1297 linkmode_zero(state->lp_advertising); 1298 state->interface = pl->link_config.interface; 1299 state->rate_matching = pl->link_config.rate_matching; 1300 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 1301 state->advertising)) { 1302 state->speed = SPEED_UNKNOWN; 1303 state->duplex = DUPLEX_UNKNOWN; 1304 state->pause = MLO_PAUSE_NONE; 1305 } else { 1306 state->speed = pl->link_config.speed; 1307 state->duplex = pl->link_config.duplex; 1308 state->pause = pl->link_config.pause; 1309 } 1310 state->an_complete = 0; 1311 state->link = 1; 1312 1313 if (pl->pcs) 1314 pl->pcs->ops->pcs_get_state(pl->pcs, state); 1315 else 1316 state->link = 0; 1317 } 1318 1319 /* The fixed state is... fixed except for the link state, 1320 * which may be determined by a GPIO or a callback. 1321 */ 1322 static void phylink_get_fixed_state(struct phylink *pl, 1323 struct phylink_link_state *state) 1324 { 1325 *state = pl->link_config; 1326 if (pl->config->get_fixed_state) 1327 pl->config->get_fixed_state(pl->config, state); 1328 else if (pl->link_gpio) 1329 state->link = !!gpiod_get_value_cansleep(pl->link_gpio); 1330 1331 state->pause = MLO_PAUSE_NONE; 1332 phylink_resolve_an_pause(state); 1333 } 1334 1335 static void phylink_mac_initial_config(struct phylink *pl, bool force_restart) 1336 { 1337 struct phylink_link_state link_state; 1338 1339 switch (pl->cur_link_an_mode) { 1340 case MLO_AN_PHY: 1341 link_state = pl->phy_state; 1342 break; 1343 1344 case MLO_AN_FIXED: 1345 phylink_get_fixed_state(pl, &link_state); 1346 break; 1347 1348 case MLO_AN_INBAND: 1349 link_state = pl->link_config; 1350 if (link_state.interface == PHY_INTERFACE_MODE_SGMII) 1351 link_state.pause = MLO_PAUSE_NONE; 1352 break; 1353 1354 default: /* can't happen */ 1355 return; 1356 } 1357 1358 link_state.link = false; 1359 1360 phylink_apply_manual_flow(pl, &link_state); 1361 phylink_major_config(pl, force_restart, &link_state); 1362 } 1363 1364 static const char *phylink_pause_to_str(int pause) 1365 { 1366 switch (pause & MLO_PAUSE_TXRX_MASK) { 1367 case MLO_PAUSE_TX | MLO_PAUSE_RX: 1368 return "rx/tx"; 1369 case MLO_PAUSE_TX: 1370 return "tx"; 1371 case MLO_PAUSE_RX: 1372 return "rx"; 1373 default: 1374 return "off"; 1375 } 1376 } 1377 1378 static void phylink_link_up(struct phylink *pl, 1379 struct phylink_link_state link_state) 1380 { 1381 struct net_device *ndev = pl->netdev; 1382 unsigned int neg_mode; 1383 int speed, duplex; 1384 bool rx_pause; 1385 1386 speed = link_state.speed; 1387 duplex = link_state.duplex; 1388 rx_pause = !!(link_state.pause & MLO_PAUSE_RX); 1389 1390 switch (link_state.rate_matching) { 1391 case RATE_MATCH_PAUSE: 1392 /* The PHY is doing rate matchion from the media rate (in 1393 * the link_state) to the interface speed, and will send 1394 * pause frames to the MAC to limit its transmission speed. 1395 */ 1396 speed = phylink_interface_max_speed(link_state.interface); 1397 duplex = DUPLEX_FULL; 1398 rx_pause = true; 1399 break; 1400 1401 case RATE_MATCH_CRS: 1402 /* The PHY is doing rate matchion from the media rate (in 1403 * the link_state) to the interface speed, and will cause 1404 * collisions to the MAC to limit its transmission speed. 1405 */ 1406 speed = phylink_interface_max_speed(link_state.interface); 1407 duplex = DUPLEX_HALF; 1408 break; 1409 } 1410 1411 pl->cur_interface = link_state.interface; 1412 1413 neg_mode = pl->cur_link_an_mode; 1414 if (pl->pcs && pl->pcs->neg_mode) 1415 neg_mode = pl->pcs_neg_mode; 1416 1417 phylink_pcs_link_up(pl->pcs, neg_mode, pl->cur_interface, speed, 1418 duplex); 1419 1420 pl->mac_ops->mac_link_up(pl->config, pl->phydev, pl->cur_link_an_mode, 1421 pl->cur_interface, speed, duplex, 1422 !!(link_state.pause & MLO_PAUSE_TX), rx_pause); 1423 1424 if (ndev) 1425 netif_carrier_on(ndev); 1426 1427 phylink_info(pl, 1428 "Link is Up - %s/%s - flow control %s\n", 1429 phy_speed_to_str(link_state.speed), 1430 phy_duplex_to_str(link_state.duplex), 1431 phylink_pause_to_str(link_state.pause)); 1432 } 1433 1434 static void phylink_link_down(struct phylink *pl) 1435 { 1436 struct net_device *ndev = pl->netdev; 1437 1438 if (ndev) 1439 netif_carrier_off(ndev); 1440 pl->mac_ops->mac_link_down(pl->config, pl->cur_link_an_mode, 1441 pl->cur_interface); 1442 phylink_info(pl, "Link is Down\n"); 1443 } 1444 1445 static void phylink_resolve(struct work_struct *w) 1446 { 1447 struct phylink *pl = container_of(w, struct phylink, resolve); 1448 struct phylink_link_state link_state; 1449 struct net_device *ndev = pl->netdev; 1450 bool mac_config = false; 1451 bool retrigger = false; 1452 bool cur_link_state; 1453 1454 mutex_lock(&pl->state_mutex); 1455 if (pl->netdev) 1456 cur_link_state = netif_carrier_ok(ndev); 1457 else 1458 cur_link_state = pl->old_link_state; 1459 1460 if (pl->phylink_disable_state) { 1461 pl->link_failed = false; 1462 link_state.link = false; 1463 } else if (pl->link_failed) { 1464 link_state.link = false; 1465 retrigger = true; 1466 } else if (pl->cur_link_an_mode == MLO_AN_FIXED) { 1467 phylink_get_fixed_state(pl, &link_state); 1468 mac_config = link_state.link; 1469 } else if (pl->cur_link_an_mode == MLO_AN_PHY) { 1470 link_state = pl->phy_state; 1471 mac_config = link_state.link; 1472 } else { 1473 phylink_mac_pcs_get_state(pl, &link_state); 1474 1475 /* The PCS may have a latching link-fail indicator. If the link 1476 * was up, bring the link down and re-trigger the resolve. 1477 * Otherwise, re-read the PCS state to get the current status 1478 * of the link. 1479 */ 1480 if (!link_state.link) { 1481 if (cur_link_state) 1482 retrigger = true; 1483 else 1484 phylink_mac_pcs_get_state(pl, &link_state); 1485 } 1486 1487 /* If we have a phy, the "up" state is the union of both the 1488 * PHY and the MAC 1489 */ 1490 if (pl->phydev) 1491 link_state.link &= pl->phy_state.link; 1492 1493 /* Only update if the PHY link is up */ 1494 if (pl->phydev && pl->phy_state.link) { 1495 /* If the interface has changed, force a link down 1496 * event if the link isn't already down, and re-resolve. 1497 */ 1498 if (link_state.interface != pl->phy_state.interface) { 1499 retrigger = true; 1500 link_state.link = false; 1501 } 1502 1503 link_state.interface = pl->phy_state.interface; 1504 1505 /* If we are doing rate matching, then the link 1506 * speed/duplex comes from the PHY 1507 */ 1508 if (pl->phy_state.rate_matching) { 1509 link_state.rate_matching = 1510 pl->phy_state.rate_matching; 1511 link_state.speed = pl->phy_state.speed; 1512 link_state.duplex = pl->phy_state.duplex; 1513 } 1514 1515 /* If we have a PHY, we need to update with the PHY 1516 * flow control bits. 1517 */ 1518 link_state.pause = pl->phy_state.pause; 1519 mac_config = true; 1520 } 1521 } 1522 1523 if (pl->cur_link_an_mode != MLO_AN_FIXED) 1524 phylink_apply_manual_flow(pl, &link_state); 1525 1526 if (mac_config) { 1527 if (link_state.interface != pl->link_config.interface) { 1528 /* The interface has changed, force the link down and 1529 * then reconfigure. 1530 */ 1531 if (cur_link_state) { 1532 phylink_link_down(pl); 1533 cur_link_state = false; 1534 } 1535 phylink_major_config(pl, false, &link_state); 1536 pl->link_config.interface = link_state.interface; 1537 } 1538 } 1539 1540 if (link_state.link != cur_link_state) { 1541 pl->old_link_state = link_state.link; 1542 if (!link_state.link) 1543 phylink_link_down(pl); 1544 else 1545 phylink_link_up(pl, link_state); 1546 } 1547 if (!link_state.link && retrigger) { 1548 pl->link_failed = false; 1549 queue_work(system_power_efficient_wq, &pl->resolve); 1550 } 1551 mutex_unlock(&pl->state_mutex); 1552 } 1553 1554 static void phylink_run_resolve(struct phylink *pl) 1555 { 1556 if (!pl->phylink_disable_state) 1557 queue_work(system_power_efficient_wq, &pl->resolve); 1558 } 1559 1560 static void phylink_run_resolve_and_disable(struct phylink *pl, int bit) 1561 { 1562 unsigned long state = pl->phylink_disable_state; 1563 1564 set_bit(bit, &pl->phylink_disable_state); 1565 if (state == 0) { 1566 queue_work(system_power_efficient_wq, &pl->resolve); 1567 flush_work(&pl->resolve); 1568 } 1569 } 1570 1571 static void phylink_enable_and_run_resolve(struct phylink *pl, int bit) 1572 { 1573 clear_bit(bit, &pl->phylink_disable_state); 1574 phylink_run_resolve(pl); 1575 } 1576 1577 static void phylink_fixed_poll(struct timer_list *t) 1578 { 1579 struct phylink *pl = container_of(t, struct phylink, link_poll); 1580 1581 mod_timer(t, jiffies + HZ); 1582 1583 phylink_run_resolve(pl); 1584 } 1585 1586 static const struct sfp_upstream_ops sfp_phylink_ops; 1587 1588 static int phylink_register_sfp(struct phylink *pl, 1589 const struct fwnode_handle *fwnode) 1590 { 1591 struct sfp_bus *bus; 1592 int ret; 1593 1594 if (!fwnode) 1595 return 0; 1596 1597 bus = sfp_bus_find_fwnode(fwnode); 1598 if (IS_ERR(bus)) { 1599 phylink_err(pl, "unable to attach SFP bus: %pe\n", bus); 1600 return PTR_ERR(bus); 1601 } 1602 1603 pl->sfp_bus = bus; 1604 1605 ret = sfp_bus_add_upstream(bus, pl, &sfp_phylink_ops); 1606 sfp_bus_put(bus); 1607 1608 return ret; 1609 } 1610 1611 /** 1612 * phylink_set_fixed_link() - set the fixed link 1613 * @pl: a pointer to a &struct phylink returned from phylink_create() 1614 * @state: a pointer to a struct phylink_link_state. 1615 * 1616 * This function is used when the link parameters are known and do not change, 1617 * making it suitable for certain types of network connections. 1618 * 1619 * Returns: zero on success or negative error code. 1620 */ 1621 int phylink_set_fixed_link(struct phylink *pl, 1622 const struct phylink_link_state *state) 1623 { 1624 const struct phy_setting *s; 1625 unsigned long *adv; 1626 1627 if (pl->cfg_link_an_mode != MLO_AN_PHY || !state || 1628 !test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) 1629 return -EINVAL; 1630 1631 s = phy_lookup_setting(state->speed, state->duplex, 1632 pl->supported, true); 1633 if (!s) 1634 return -EINVAL; 1635 1636 adv = pl->link_config.advertising; 1637 linkmode_zero(adv); 1638 linkmode_set_bit(s->bit, adv); 1639 linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, adv); 1640 1641 pl->link_config.speed = state->speed; 1642 pl->link_config.duplex = state->duplex; 1643 pl->link_config.link = 1; 1644 pl->link_config.an_complete = 1; 1645 1646 pl->cfg_link_an_mode = MLO_AN_FIXED; 1647 pl->cur_link_an_mode = pl->cfg_link_an_mode; 1648 1649 return 0; 1650 } 1651 EXPORT_SYMBOL_GPL(phylink_set_fixed_link); 1652 1653 /** 1654 * phylink_create() - create a phylink instance 1655 * @config: a pointer to the target &struct phylink_config 1656 * @fwnode: a pointer to a &struct fwnode_handle describing the network 1657 * interface 1658 * @iface: the desired link mode defined by &typedef phy_interface_t 1659 * @mac_ops: a pointer to a &struct phylink_mac_ops for the MAC. 1660 * 1661 * Create a new phylink instance, and parse the link parameters found in @np. 1662 * This will parse in-band modes, fixed-link or SFP configuration. 1663 * 1664 * Note: the rtnl lock must not be held when calling this function. 1665 * 1666 * Returns a pointer to a &struct phylink, or an error-pointer value. Users 1667 * must use IS_ERR() to check for errors from this function. 1668 */ 1669 struct phylink *phylink_create(struct phylink_config *config, 1670 const struct fwnode_handle *fwnode, 1671 phy_interface_t iface, 1672 const struct phylink_mac_ops *mac_ops) 1673 { 1674 struct phylink *pl; 1675 int ret; 1676 1677 /* Validate the supplied configuration */ 1678 if (phy_interface_empty(config->supported_interfaces)) { 1679 dev_err(config->dev, 1680 "phylink: error: empty supported_interfaces\n"); 1681 return ERR_PTR(-EINVAL); 1682 } 1683 1684 pl = kzalloc(sizeof(*pl), GFP_KERNEL); 1685 if (!pl) 1686 return ERR_PTR(-ENOMEM); 1687 1688 mutex_init(&pl->state_mutex); 1689 INIT_WORK(&pl->resolve, phylink_resolve); 1690 1691 pl->config = config; 1692 if (config->type == PHYLINK_NETDEV) { 1693 pl->netdev = to_net_dev(config->dev); 1694 netif_carrier_off(pl->netdev); 1695 } else if (config->type == PHYLINK_DEV) { 1696 pl->dev = config->dev; 1697 } else { 1698 kfree(pl); 1699 return ERR_PTR(-EINVAL); 1700 } 1701 1702 pl->phy_state.interface = iface; 1703 pl->link_interface = iface; 1704 if (iface == PHY_INTERFACE_MODE_MOCA) 1705 pl->link_port = PORT_BNC; 1706 else 1707 pl->link_port = PORT_MII; 1708 pl->link_config.interface = iface; 1709 pl->link_config.pause = MLO_PAUSE_AN; 1710 pl->link_config.speed = SPEED_UNKNOWN; 1711 pl->link_config.duplex = DUPLEX_UNKNOWN; 1712 pl->pcs_state = PCS_STATE_DOWN; 1713 pl->mac_ops = mac_ops; 1714 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 1715 timer_setup(&pl->link_poll, phylink_fixed_poll, 0); 1716 1717 linkmode_fill(pl->supported); 1718 linkmode_copy(pl->link_config.advertising, pl->supported); 1719 phylink_validate(pl, pl->supported, &pl->link_config); 1720 1721 ret = phylink_parse_mode(pl, fwnode); 1722 if (ret < 0) { 1723 kfree(pl); 1724 return ERR_PTR(ret); 1725 } 1726 1727 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 1728 ret = phylink_parse_fixedlink(pl, fwnode); 1729 if (ret < 0) { 1730 kfree(pl); 1731 return ERR_PTR(ret); 1732 } 1733 } 1734 1735 pl->cur_link_an_mode = pl->cfg_link_an_mode; 1736 1737 ret = phylink_register_sfp(pl, fwnode); 1738 if (ret < 0) { 1739 kfree(pl); 1740 return ERR_PTR(ret); 1741 } 1742 1743 return pl; 1744 } 1745 EXPORT_SYMBOL_GPL(phylink_create); 1746 1747 /** 1748 * phylink_destroy() - cleanup and destroy the phylink instance 1749 * @pl: a pointer to a &struct phylink returned from phylink_create() 1750 * 1751 * Destroy a phylink instance. Any PHY that has been attached must have been 1752 * cleaned up via phylink_disconnect_phy() prior to calling this function. 1753 * 1754 * Note: the rtnl lock must not be held when calling this function. 1755 */ 1756 void phylink_destroy(struct phylink *pl) 1757 { 1758 sfp_bus_del_upstream(pl->sfp_bus); 1759 if (pl->link_gpio) 1760 gpiod_put(pl->link_gpio); 1761 1762 cancel_work_sync(&pl->resolve); 1763 kfree(pl); 1764 } 1765 EXPORT_SYMBOL_GPL(phylink_destroy); 1766 1767 /** 1768 * phylink_expects_phy() - Determine if phylink expects a phy to be attached 1769 * @pl: a pointer to a &struct phylink returned from phylink_create() 1770 * 1771 * When using fixed-link mode, or in-band mode with 1000base-X or 2500base-X, 1772 * no PHY is needed. 1773 * 1774 * Returns true if phylink will be expecting a PHY. 1775 */ 1776 bool phylink_expects_phy(struct phylink *pl) 1777 { 1778 if (pl->cfg_link_an_mode == MLO_AN_FIXED || 1779 (pl->cfg_link_an_mode == MLO_AN_INBAND && 1780 phy_interface_mode_is_8023z(pl->link_config.interface))) 1781 return false; 1782 return true; 1783 } 1784 EXPORT_SYMBOL_GPL(phylink_expects_phy); 1785 1786 static void phylink_phy_change(struct phy_device *phydev, bool up) 1787 { 1788 struct phylink *pl = phydev->phylink; 1789 bool tx_pause, rx_pause; 1790 1791 phy_get_pause(phydev, &tx_pause, &rx_pause); 1792 1793 mutex_lock(&pl->state_mutex); 1794 pl->phy_state.speed = phydev->speed; 1795 pl->phy_state.duplex = phydev->duplex; 1796 pl->phy_state.rate_matching = phydev->rate_matching; 1797 pl->phy_state.pause = MLO_PAUSE_NONE; 1798 if (tx_pause) 1799 pl->phy_state.pause |= MLO_PAUSE_TX; 1800 if (rx_pause) 1801 pl->phy_state.pause |= MLO_PAUSE_RX; 1802 pl->phy_state.interface = phydev->interface; 1803 pl->phy_state.link = up; 1804 if (!up) 1805 pl->link_failed = true; 1806 mutex_unlock(&pl->state_mutex); 1807 1808 phylink_run_resolve(pl); 1809 1810 phylink_dbg(pl, "phy link %s %s/%s/%s/%s/%s\n", up ? "up" : "down", 1811 phy_modes(phydev->interface), 1812 phy_speed_to_str(phydev->speed), 1813 phy_duplex_to_str(phydev->duplex), 1814 phy_rate_matching_to_str(phydev->rate_matching), 1815 phylink_pause_to_str(pl->phy_state.pause)); 1816 } 1817 1818 static int phylink_validate_phy(struct phylink *pl, struct phy_device *phy, 1819 unsigned long *supported, 1820 struct phylink_link_state *state) 1821 { 1822 DECLARE_PHY_INTERFACE_MASK(interfaces); 1823 1824 /* If the PHY provides a bitmap of the interfaces it will be using 1825 * depending on the negotiated media speeds, use this to validate 1826 * which ethtool link modes can be used. 1827 */ 1828 if (!phy_interface_empty(phy->possible_interfaces)) { 1829 /* We only care about the union of the PHY's interfaces and 1830 * those which the host supports. 1831 */ 1832 phy_interface_and(interfaces, phy->possible_interfaces, 1833 pl->config->supported_interfaces); 1834 1835 if (phy_interface_empty(interfaces)) { 1836 phylink_err(pl, "PHY has no common interfaces\n"); 1837 return -EINVAL; 1838 } 1839 1840 if (phy_on_sfp(phy)) { 1841 /* If the PHY is on a SFP, limit the interfaces to 1842 * those that can be used with a SFP module. 1843 */ 1844 phy_interface_and(interfaces, interfaces, 1845 phylink_sfp_interfaces); 1846 1847 if (phy_interface_empty(interfaces)) { 1848 phylink_err(pl, "SFP PHY's possible interfaces becomes empty\n"); 1849 return -EINVAL; 1850 } 1851 } 1852 1853 phylink_dbg(pl, "PHY %s uses interfaces %*pbl, validating %*pbl\n", 1854 phydev_name(phy), 1855 (int)PHY_INTERFACE_MODE_MAX, 1856 phy->possible_interfaces, 1857 (int)PHY_INTERFACE_MODE_MAX, interfaces); 1858 1859 return phylink_validate_mask(pl, phy, supported, state, 1860 interfaces); 1861 } 1862 1863 phylink_dbg(pl, "PHY %s doesn't supply possible interfaces\n", 1864 phydev_name(phy)); 1865 1866 /* Check whether we would use rate matching for the proposed interface 1867 * mode. 1868 */ 1869 state->rate_matching = phy_get_rate_matching(phy, state->interface); 1870 1871 /* Clause 45 PHYs may switch their Serdes lane between, e.g. 10GBASE-R, 1872 * 5GBASE-R, 2500BASE-X and SGMII if they are not using rate matching. 1873 * For some interface modes (e.g. RXAUI, XAUI and USXGMII) switching 1874 * their Serdes is either unnecessary or not reasonable. 1875 * 1876 * For these which switch interface modes, we really need to know which 1877 * interface modes the PHY supports to properly work out which ethtool 1878 * linkmodes can be supported. For now, as a work-around, we validate 1879 * against all interface modes, which may lead to more ethtool link 1880 * modes being advertised than are actually supported. 1881 */ 1882 if (phy->is_c45 && state->rate_matching == RATE_MATCH_NONE && 1883 state->interface != PHY_INTERFACE_MODE_RXAUI && 1884 state->interface != PHY_INTERFACE_MODE_XAUI && 1885 state->interface != PHY_INTERFACE_MODE_USXGMII) 1886 state->interface = PHY_INTERFACE_MODE_NA; 1887 1888 return phylink_validate(pl, supported, state); 1889 } 1890 1891 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy, 1892 phy_interface_t interface) 1893 { 1894 struct phylink_link_state config; 1895 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 1896 char *irq_str; 1897 int ret; 1898 1899 /* 1900 * This is the new way of dealing with flow control for PHYs, 1901 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 1902 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 1903 * using our validate call to the MAC, we rely upon the MAC 1904 * clearing the bits from both supported and advertising fields. 1905 */ 1906 phy_support_asym_pause(phy); 1907 1908 memset(&config, 0, sizeof(config)); 1909 linkmode_copy(supported, phy->supported); 1910 linkmode_copy(config.advertising, phy->advertising); 1911 config.interface = interface; 1912 1913 ret = phylink_validate_phy(pl, phy, supported, &config); 1914 if (ret) { 1915 phylink_warn(pl, "validation of %s with support %*pb and advertisement %*pb failed: %pe\n", 1916 phy_modes(config.interface), 1917 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->supported, 1918 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising, 1919 ERR_PTR(ret)); 1920 return ret; 1921 } 1922 1923 phy->phylink = pl; 1924 phy->phy_link_change = phylink_phy_change; 1925 1926 irq_str = phy_attached_info_irq(phy); 1927 phylink_info(pl, 1928 "PHY [%s] driver [%s] (irq=%s)\n", 1929 dev_name(&phy->mdio.dev), phy->drv->name, irq_str); 1930 kfree(irq_str); 1931 1932 mutex_lock(&phy->lock); 1933 mutex_lock(&pl->state_mutex); 1934 pl->phydev = phy; 1935 pl->phy_state.interface = interface; 1936 pl->phy_state.pause = MLO_PAUSE_NONE; 1937 pl->phy_state.speed = SPEED_UNKNOWN; 1938 pl->phy_state.duplex = DUPLEX_UNKNOWN; 1939 pl->phy_state.rate_matching = RATE_MATCH_NONE; 1940 linkmode_copy(pl->supported, supported); 1941 linkmode_copy(pl->link_config.advertising, config.advertising); 1942 1943 /* Restrict the phy advertisement according to the MAC support. */ 1944 linkmode_copy(phy->advertising, config.advertising); 1945 mutex_unlock(&pl->state_mutex); 1946 mutex_unlock(&phy->lock); 1947 1948 phylink_dbg(pl, 1949 "phy: %s setting supported %*pb advertising %*pb\n", 1950 phy_modes(interface), 1951 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported, 1952 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising); 1953 1954 if (phy_interrupt_is_valid(phy)) 1955 phy_request_interrupt(phy); 1956 1957 if (pl->config->mac_managed_pm) 1958 phy->mac_managed_pm = true; 1959 1960 return 0; 1961 } 1962 1963 static int phylink_attach_phy(struct phylink *pl, struct phy_device *phy, 1964 phy_interface_t interface) 1965 { 1966 u32 flags = 0; 1967 1968 if (WARN_ON(pl->cfg_link_an_mode == MLO_AN_FIXED || 1969 (pl->cfg_link_an_mode == MLO_AN_INBAND && 1970 phy_interface_mode_is_8023z(interface) && !pl->sfp_bus))) 1971 return -EINVAL; 1972 1973 if (pl->phydev) 1974 return -EBUSY; 1975 1976 if (pl->config->mac_requires_rxc) 1977 flags |= PHY_F_RXC_ALWAYS_ON; 1978 1979 return phy_attach_direct(pl->netdev, phy, flags, interface); 1980 } 1981 1982 /** 1983 * phylink_connect_phy() - connect a PHY to the phylink instance 1984 * @pl: a pointer to a &struct phylink returned from phylink_create() 1985 * @phy: a pointer to a &struct phy_device. 1986 * 1987 * Connect @phy to the phylink instance specified by @pl by calling 1988 * phy_attach_direct(). Configure the @phy according to the MAC driver's 1989 * capabilities, start the PHYLIB state machine and enable any interrupts 1990 * that the PHY supports. 1991 * 1992 * This updates the phylink's ethtool supported and advertising link mode 1993 * masks. 1994 * 1995 * Returns 0 on success or a negative errno. 1996 */ 1997 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy) 1998 { 1999 int ret; 2000 2001 /* Use PHY device/driver interface */ 2002 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 2003 pl->link_interface = phy->interface; 2004 pl->link_config.interface = pl->link_interface; 2005 } 2006 2007 ret = phylink_attach_phy(pl, phy, pl->link_interface); 2008 if (ret < 0) 2009 return ret; 2010 2011 ret = phylink_bringup_phy(pl, phy, pl->link_config.interface); 2012 if (ret) 2013 phy_detach(phy); 2014 2015 return ret; 2016 } 2017 EXPORT_SYMBOL_GPL(phylink_connect_phy); 2018 2019 /** 2020 * phylink_of_phy_connect() - connect the PHY specified in the DT mode. 2021 * @pl: a pointer to a &struct phylink returned from phylink_create() 2022 * @dn: a pointer to a &struct device_node. 2023 * @flags: PHY-specific flags to communicate to the PHY device driver 2024 * 2025 * Connect the phy specified in the device node @dn to the phylink instance 2026 * specified by @pl. Actions specified in phylink_connect_phy() will be 2027 * performed. 2028 * 2029 * Returns 0 on success or a negative errno. 2030 */ 2031 int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn, 2032 u32 flags) 2033 { 2034 return phylink_fwnode_phy_connect(pl, of_fwnode_handle(dn), flags); 2035 } 2036 EXPORT_SYMBOL_GPL(phylink_of_phy_connect); 2037 2038 /** 2039 * phylink_fwnode_phy_connect() - connect the PHY specified in the fwnode. 2040 * @pl: a pointer to a &struct phylink returned from phylink_create() 2041 * @fwnode: a pointer to a &struct fwnode_handle. 2042 * @flags: PHY-specific flags to communicate to the PHY device driver 2043 * 2044 * Connect the phy specified @fwnode to the phylink instance specified 2045 * by @pl. 2046 * 2047 * Returns 0 on success or a negative errno. 2048 */ 2049 int phylink_fwnode_phy_connect(struct phylink *pl, 2050 const struct fwnode_handle *fwnode, 2051 u32 flags) 2052 { 2053 struct fwnode_handle *phy_fwnode; 2054 struct phy_device *phy_dev; 2055 int ret; 2056 2057 /* Fixed links and 802.3z are handled without needing a PHY */ 2058 if (pl->cfg_link_an_mode == MLO_AN_FIXED || 2059 (pl->cfg_link_an_mode == MLO_AN_INBAND && 2060 phy_interface_mode_is_8023z(pl->link_interface))) 2061 return 0; 2062 2063 phy_fwnode = fwnode_get_phy_node(fwnode); 2064 if (IS_ERR(phy_fwnode)) { 2065 if (pl->cfg_link_an_mode == MLO_AN_PHY) 2066 return -ENODEV; 2067 return 0; 2068 } 2069 2070 phy_dev = fwnode_phy_find_device(phy_fwnode); 2071 /* We're done with the phy_node handle */ 2072 fwnode_handle_put(phy_fwnode); 2073 if (!phy_dev) 2074 return -ENODEV; 2075 2076 /* Use PHY device/driver interface */ 2077 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 2078 pl->link_interface = phy_dev->interface; 2079 pl->link_config.interface = pl->link_interface; 2080 } 2081 2082 if (pl->config->mac_requires_rxc) 2083 flags |= PHY_F_RXC_ALWAYS_ON; 2084 2085 ret = phy_attach_direct(pl->netdev, phy_dev, flags, 2086 pl->link_interface); 2087 phy_device_free(phy_dev); 2088 if (ret) 2089 return ret; 2090 2091 ret = phylink_bringup_phy(pl, phy_dev, pl->link_config.interface); 2092 if (ret) 2093 phy_detach(phy_dev); 2094 2095 return ret; 2096 } 2097 EXPORT_SYMBOL_GPL(phylink_fwnode_phy_connect); 2098 2099 /** 2100 * phylink_disconnect_phy() - disconnect any PHY attached to the phylink 2101 * instance. 2102 * @pl: a pointer to a &struct phylink returned from phylink_create() 2103 * 2104 * Disconnect any current PHY from the phylink instance described by @pl. 2105 */ 2106 void phylink_disconnect_phy(struct phylink *pl) 2107 { 2108 struct phy_device *phy; 2109 2110 ASSERT_RTNL(); 2111 2112 phy = pl->phydev; 2113 if (phy) { 2114 mutex_lock(&phy->lock); 2115 mutex_lock(&pl->state_mutex); 2116 pl->phydev = NULL; 2117 mutex_unlock(&pl->state_mutex); 2118 mutex_unlock(&phy->lock); 2119 flush_work(&pl->resolve); 2120 2121 phy_disconnect(phy); 2122 } 2123 } 2124 EXPORT_SYMBOL_GPL(phylink_disconnect_phy); 2125 2126 static void phylink_link_changed(struct phylink *pl, bool up, const char *what) 2127 { 2128 if (!up) 2129 pl->link_failed = true; 2130 phylink_run_resolve(pl); 2131 phylink_dbg(pl, "%s link %s\n", what, up ? "up" : "down"); 2132 } 2133 2134 /** 2135 * phylink_mac_change() - notify phylink of a change in MAC state 2136 * @pl: a pointer to a &struct phylink returned from phylink_create() 2137 * @up: indicates whether the link is currently up. 2138 * 2139 * The MAC driver should call this driver when the state of its link 2140 * changes (eg, link failure, new negotiation results, etc.) 2141 */ 2142 void phylink_mac_change(struct phylink *pl, bool up) 2143 { 2144 phylink_link_changed(pl, up, "mac"); 2145 } 2146 EXPORT_SYMBOL_GPL(phylink_mac_change); 2147 2148 /** 2149 * phylink_pcs_change() - notify phylink of a change to PCS link state 2150 * @pcs: pointer to &struct phylink_pcs 2151 * @up: indicates whether the link is currently up. 2152 * 2153 * The PCS driver should call this when the state of its link changes 2154 * (e.g. link failure, new negotiation results, etc.) Note: it should 2155 * not determine "up" by reading the BMSR. If in doubt about the link 2156 * state at interrupt time, then pass true if pcs_get_state() returns 2157 * the latched link-down state, otherwise pass false. 2158 */ 2159 void phylink_pcs_change(struct phylink_pcs *pcs, bool up) 2160 { 2161 struct phylink *pl = pcs->phylink; 2162 2163 if (pl) 2164 phylink_link_changed(pl, up, "pcs"); 2165 } 2166 EXPORT_SYMBOL_GPL(phylink_pcs_change); 2167 2168 static irqreturn_t phylink_link_handler(int irq, void *data) 2169 { 2170 struct phylink *pl = data; 2171 2172 phylink_run_resolve(pl); 2173 2174 return IRQ_HANDLED; 2175 } 2176 2177 /** 2178 * phylink_start() - start a phylink instance 2179 * @pl: a pointer to a &struct phylink returned from phylink_create() 2180 * 2181 * Start the phylink instance specified by @pl, configuring the MAC for the 2182 * desired link mode(s) and negotiation style. This should be called from the 2183 * network device driver's &struct net_device_ops ndo_open() method. 2184 */ 2185 void phylink_start(struct phylink *pl) 2186 { 2187 bool poll = false; 2188 2189 ASSERT_RTNL(); 2190 2191 phylink_info(pl, "configuring for %s/%s link mode\n", 2192 phylink_an_mode_str(pl->cur_link_an_mode), 2193 phy_modes(pl->link_config.interface)); 2194 2195 /* Always set the carrier off */ 2196 if (pl->netdev) 2197 netif_carrier_off(pl->netdev); 2198 2199 pl->pcs_state = PCS_STATE_STARTING; 2200 2201 /* Apply the link configuration to the MAC when starting. This allows 2202 * a fixed-link to start with the correct parameters, and also 2203 * ensures that we set the appropriate advertisement for Serdes links. 2204 * 2205 * Restart autonegotiation if using 802.3z to ensure that the link 2206 * parameters are properly negotiated. This is necessary for DSA 2207 * switches using 802.3z negotiation to ensure they see our modes. 2208 */ 2209 phylink_mac_initial_config(pl, true); 2210 2211 pl->pcs_state = PCS_STATE_STARTED; 2212 2213 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_STOPPED); 2214 2215 if (pl->cfg_link_an_mode == MLO_AN_FIXED && pl->link_gpio) { 2216 int irq = gpiod_to_irq(pl->link_gpio); 2217 2218 if (irq > 0) { 2219 if (!request_irq(irq, phylink_link_handler, 2220 IRQF_TRIGGER_RISING | 2221 IRQF_TRIGGER_FALLING, 2222 "netdev link", pl)) 2223 pl->link_irq = irq; 2224 else 2225 irq = 0; 2226 } 2227 if (irq <= 0) 2228 poll = true; 2229 } 2230 2231 if (pl->cfg_link_an_mode == MLO_AN_FIXED) 2232 poll |= pl->config->poll_fixed_state; 2233 2234 if (poll) 2235 mod_timer(&pl->link_poll, jiffies + HZ); 2236 if (pl->phydev) 2237 phy_start(pl->phydev); 2238 if (pl->sfp_bus) 2239 sfp_upstream_start(pl->sfp_bus); 2240 } 2241 EXPORT_SYMBOL_GPL(phylink_start); 2242 2243 /** 2244 * phylink_stop() - stop a phylink instance 2245 * @pl: a pointer to a &struct phylink returned from phylink_create() 2246 * 2247 * Stop the phylink instance specified by @pl. This should be called from the 2248 * network device driver's &struct net_device_ops ndo_stop() method. The 2249 * network device's carrier state should not be changed prior to calling this 2250 * function. 2251 * 2252 * This will synchronously bring down the link if the link is not already 2253 * down (in other words, it will trigger a mac_link_down() method call.) 2254 */ 2255 void phylink_stop(struct phylink *pl) 2256 { 2257 ASSERT_RTNL(); 2258 2259 if (pl->sfp_bus) 2260 sfp_upstream_stop(pl->sfp_bus); 2261 if (pl->phydev) 2262 phy_stop(pl->phydev); 2263 del_timer_sync(&pl->link_poll); 2264 if (pl->link_irq) { 2265 free_irq(pl->link_irq, pl); 2266 pl->link_irq = 0; 2267 } 2268 2269 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED); 2270 2271 pl->pcs_state = PCS_STATE_DOWN; 2272 2273 phylink_pcs_disable(pl->pcs); 2274 } 2275 EXPORT_SYMBOL_GPL(phylink_stop); 2276 2277 /** 2278 * phylink_suspend() - handle a network device suspend event 2279 * @pl: a pointer to a &struct phylink returned from phylink_create() 2280 * @mac_wol: true if the MAC needs to receive packets for Wake-on-Lan 2281 * 2282 * Handle a network device suspend event. There are several cases: 2283 * 2284 * - If Wake-on-Lan is not active, we can bring down the link between 2285 * the MAC and PHY by calling phylink_stop(). 2286 * - If Wake-on-Lan is active, and being handled only by the PHY, we 2287 * can also bring down the link between the MAC and PHY. 2288 * - If Wake-on-Lan is active, but being handled by the MAC, the MAC 2289 * still needs to receive packets, so we can not bring the link down. 2290 */ 2291 void phylink_suspend(struct phylink *pl, bool mac_wol) 2292 { 2293 ASSERT_RTNL(); 2294 2295 if (mac_wol && (!pl->netdev || pl->netdev->ethtool->wol_enabled)) { 2296 /* Wake-on-Lan enabled, MAC handling */ 2297 mutex_lock(&pl->state_mutex); 2298 2299 /* Stop the resolver bringing the link up */ 2300 __set_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state); 2301 2302 /* Disable the carrier, to prevent transmit timeouts, 2303 * but one would hope all packets have been sent. This 2304 * also means phylink_resolve() will do nothing. 2305 */ 2306 if (pl->netdev) 2307 netif_carrier_off(pl->netdev); 2308 else 2309 pl->old_link_state = false; 2310 2311 /* We do not call mac_link_down() here as we want the 2312 * link to remain up to receive the WoL packets. 2313 */ 2314 mutex_unlock(&pl->state_mutex); 2315 } else { 2316 phylink_stop(pl); 2317 } 2318 } 2319 EXPORT_SYMBOL_GPL(phylink_suspend); 2320 2321 /** 2322 * phylink_resume() - handle a network device resume event 2323 * @pl: a pointer to a &struct phylink returned from phylink_create() 2324 * 2325 * Undo the effects of phylink_suspend(), returning the link to an 2326 * operational state. 2327 */ 2328 void phylink_resume(struct phylink *pl) 2329 { 2330 ASSERT_RTNL(); 2331 2332 if (test_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state)) { 2333 /* Wake-on-Lan enabled, MAC handling */ 2334 2335 /* Call mac_link_down() so we keep the overall state balanced. 2336 * Do this under the state_mutex lock for consistency. This 2337 * will cause a "Link Down" message to be printed during 2338 * resume, which is harmless - the true link state will be 2339 * printed when we run a resolve. 2340 */ 2341 mutex_lock(&pl->state_mutex); 2342 phylink_link_down(pl); 2343 mutex_unlock(&pl->state_mutex); 2344 2345 /* Re-apply the link parameters so that all the settings get 2346 * restored to the MAC. 2347 */ 2348 phylink_mac_initial_config(pl, true); 2349 2350 /* Re-enable and re-resolve the link parameters */ 2351 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_MAC_WOL); 2352 } else { 2353 phylink_start(pl); 2354 } 2355 } 2356 EXPORT_SYMBOL_GPL(phylink_resume); 2357 2358 /** 2359 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY 2360 * @pl: a pointer to a &struct phylink returned from phylink_create() 2361 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters 2362 * 2363 * Read the wake on lan parameters from the PHY attached to the phylink 2364 * instance specified by @pl. If no PHY is currently attached, report no 2365 * support for wake on lan. 2366 */ 2367 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 2368 { 2369 ASSERT_RTNL(); 2370 2371 wol->supported = 0; 2372 wol->wolopts = 0; 2373 2374 if (pl->phydev) 2375 phy_ethtool_get_wol(pl->phydev, wol); 2376 } 2377 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol); 2378 2379 /** 2380 * phylink_ethtool_set_wol() - set wake on lan parameters 2381 * @pl: a pointer to a &struct phylink returned from phylink_create() 2382 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters 2383 * 2384 * Set the wake on lan parameters for the PHY attached to the phylink 2385 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP 2386 * error. 2387 * 2388 * Returns zero on success or negative errno code. 2389 */ 2390 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 2391 { 2392 int ret = -EOPNOTSUPP; 2393 2394 ASSERT_RTNL(); 2395 2396 if (pl->phydev) 2397 ret = phy_ethtool_set_wol(pl->phydev, wol); 2398 2399 return ret; 2400 } 2401 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol); 2402 2403 static phy_interface_t phylink_sfp_select_interface(struct phylink *pl, 2404 const unsigned long *link_modes) 2405 { 2406 phy_interface_t interface; 2407 2408 interface = sfp_select_interface(pl->sfp_bus, link_modes); 2409 if (interface == PHY_INTERFACE_MODE_NA) { 2410 phylink_err(pl, 2411 "selection of interface failed, advertisement %*pb\n", 2412 __ETHTOOL_LINK_MODE_MASK_NBITS, 2413 link_modes); 2414 return interface; 2415 } 2416 2417 if (!test_bit(interface, pl->config->supported_interfaces)) { 2418 phylink_err(pl, 2419 "selection of interface failed, SFP selected %s (%u) but MAC supports %*pbl\n", 2420 phy_modes(interface), interface, 2421 (int)PHY_INTERFACE_MODE_MAX, 2422 pl->config->supported_interfaces); 2423 return PHY_INTERFACE_MODE_NA; 2424 } 2425 2426 return interface; 2427 } 2428 2429 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b) 2430 { 2431 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask); 2432 2433 linkmode_zero(mask); 2434 phylink_set_port_modes(mask); 2435 2436 linkmode_and(dst, dst, mask); 2437 linkmode_or(dst, dst, b); 2438 } 2439 2440 static void phylink_get_ksettings(const struct phylink_link_state *state, 2441 struct ethtool_link_ksettings *kset) 2442 { 2443 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising); 2444 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising); 2445 if (kset->base.rate_matching == RATE_MATCH_NONE) { 2446 kset->base.speed = state->speed; 2447 kset->base.duplex = state->duplex; 2448 } 2449 kset->base.autoneg = linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2450 state->advertising) ? 2451 AUTONEG_ENABLE : AUTONEG_DISABLE; 2452 } 2453 2454 /** 2455 * phylink_ethtool_ksettings_get() - get the current link settings 2456 * @pl: a pointer to a &struct phylink returned from phylink_create() 2457 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings 2458 * 2459 * Read the current link settings for the phylink instance specified by @pl. 2460 * This will be the link settings read from the MAC, PHY or fixed link 2461 * settings depending on the current negotiation mode. 2462 */ 2463 int phylink_ethtool_ksettings_get(struct phylink *pl, 2464 struct ethtool_link_ksettings *kset) 2465 { 2466 struct phylink_link_state link_state; 2467 2468 ASSERT_RTNL(); 2469 2470 if (pl->phydev) 2471 phy_ethtool_ksettings_get(pl->phydev, kset); 2472 else 2473 kset->base.port = pl->link_port; 2474 2475 linkmode_copy(kset->link_modes.supported, pl->supported); 2476 2477 switch (pl->cur_link_an_mode) { 2478 case MLO_AN_FIXED: 2479 /* We are using fixed settings. Report these as the 2480 * current link settings - and note that these also 2481 * represent the supported speeds/duplex/pause modes. 2482 */ 2483 phylink_get_fixed_state(pl, &link_state); 2484 phylink_get_ksettings(&link_state, kset); 2485 break; 2486 2487 case MLO_AN_INBAND: 2488 /* If there is a phy attached, then use the reported 2489 * settings from the phy with no modification. 2490 */ 2491 if (pl->phydev) 2492 break; 2493 2494 phylink_mac_pcs_get_state(pl, &link_state); 2495 2496 /* The MAC is reporting the link results from its own PCS 2497 * layer via in-band status. Report these as the current 2498 * link settings. 2499 */ 2500 phylink_get_ksettings(&link_state, kset); 2501 break; 2502 } 2503 2504 return 0; 2505 } 2506 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get); 2507 2508 /** 2509 * phylink_ethtool_ksettings_set() - set the link settings 2510 * @pl: a pointer to a &struct phylink returned from phylink_create() 2511 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes 2512 */ 2513 int phylink_ethtool_ksettings_set(struct phylink *pl, 2514 const struct ethtool_link_ksettings *kset) 2515 { 2516 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 2517 struct phylink_link_state config; 2518 const struct phy_setting *s; 2519 2520 ASSERT_RTNL(); 2521 2522 if (pl->phydev) { 2523 struct ethtool_link_ksettings phy_kset = *kset; 2524 2525 linkmode_and(phy_kset.link_modes.advertising, 2526 phy_kset.link_modes.advertising, 2527 pl->supported); 2528 2529 /* We can rely on phylib for this update; we also do not need 2530 * to update the pl->link_config settings: 2531 * - the configuration returned via ksettings_get() will come 2532 * from phylib whenever a PHY is present. 2533 * - link_config.interface will be updated by the PHY calling 2534 * back via phylink_phy_change() and a subsequent resolve. 2535 * - initial link configuration for PHY mode comes from the 2536 * last phy state updated via phylink_phy_change(). 2537 * - other configuration changes (e.g. pause modes) are 2538 * performed directly via phylib. 2539 * - if in in-band mode with a PHY, the link configuration 2540 * is passed on the link from the PHY, and all of 2541 * link_config.{speed,duplex,an_enabled,pause} are not used. 2542 * - the only possible use would be link_config.advertising 2543 * pause modes when in 1000base-X mode with a PHY, but in 2544 * the presence of a PHY, this should not be changed as that 2545 * should be determined from the media side advertisement. 2546 */ 2547 return phy_ethtool_ksettings_set(pl->phydev, &phy_kset); 2548 } 2549 2550 config = pl->link_config; 2551 /* Mask out unsupported advertisements */ 2552 linkmode_and(config.advertising, kset->link_modes.advertising, 2553 pl->supported); 2554 2555 /* FIXME: should we reject autoneg if phy/mac does not support it? */ 2556 switch (kset->base.autoneg) { 2557 case AUTONEG_DISABLE: 2558 /* Autonegotiation disabled, select a suitable speed and 2559 * duplex. 2560 */ 2561 s = phy_lookup_setting(kset->base.speed, kset->base.duplex, 2562 pl->supported, false); 2563 if (!s) 2564 return -EINVAL; 2565 2566 /* If we have a fixed link, refuse to change link parameters. 2567 * If the link parameters match, accept them but do nothing. 2568 */ 2569 if (pl->cur_link_an_mode == MLO_AN_FIXED) { 2570 if (s->speed != pl->link_config.speed || 2571 s->duplex != pl->link_config.duplex) 2572 return -EINVAL; 2573 return 0; 2574 } 2575 2576 config.speed = s->speed; 2577 config.duplex = s->duplex; 2578 break; 2579 2580 case AUTONEG_ENABLE: 2581 /* If we have a fixed link, allow autonegotiation (since that 2582 * is our default case) but do not allow the advertisement to 2583 * be changed. If the advertisement matches, simply return. 2584 */ 2585 if (pl->cur_link_an_mode == MLO_AN_FIXED) { 2586 if (!linkmode_equal(config.advertising, 2587 pl->link_config.advertising)) 2588 return -EINVAL; 2589 return 0; 2590 } 2591 2592 config.speed = SPEED_UNKNOWN; 2593 config.duplex = DUPLEX_UNKNOWN; 2594 break; 2595 2596 default: 2597 return -EINVAL; 2598 } 2599 2600 /* We have ruled out the case with a PHY attached, and the 2601 * fixed-link cases. All that is left are in-band links. 2602 */ 2603 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising, 2604 kset->base.autoneg == AUTONEG_ENABLE); 2605 2606 /* If this link is with an SFP, ensure that changes to advertised modes 2607 * also cause the associated interface to be selected such that the 2608 * link can be configured correctly. 2609 */ 2610 if (pl->sfp_bus) { 2611 config.interface = phylink_sfp_select_interface(pl, 2612 config.advertising); 2613 if (config.interface == PHY_INTERFACE_MODE_NA) 2614 return -EINVAL; 2615 2616 /* Revalidate with the selected interface */ 2617 linkmode_copy(support, pl->supported); 2618 if (phylink_validate(pl, support, &config)) { 2619 phylink_err(pl, "validation of %s/%s with support %*pb failed\n", 2620 phylink_an_mode_str(pl->cur_link_an_mode), 2621 phy_modes(config.interface), 2622 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 2623 return -EINVAL; 2624 } 2625 } else { 2626 /* Validate without changing the current supported mask. */ 2627 linkmode_copy(support, pl->supported); 2628 if (phylink_validate(pl, support, &config)) 2629 return -EINVAL; 2630 } 2631 2632 /* If autonegotiation is enabled, we must have an advertisement */ 2633 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2634 config.advertising) && 2635 phylink_is_empty_linkmode(config.advertising)) 2636 return -EINVAL; 2637 2638 mutex_lock(&pl->state_mutex); 2639 pl->link_config.speed = config.speed; 2640 pl->link_config.duplex = config.duplex; 2641 2642 if (pl->link_config.interface != config.interface) { 2643 /* The interface changed, e.g. 1000base-X <-> 2500base-X */ 2644 /* We need to force the link down, then change the interface */ 2645 if (pl->old_link_state) { 2646 phylink_link_down(pl); 2647 pl->old_link_state = false; 2648 } 2649 if (!test_bit(PHYLINK_DISABLE_STOPPED, 2650 &pl->phylink_disable_state)) 2651 phylink_major_config(pl, false, &config); 2652 pl->link_config.interface = config.interface; 2653 linkmode_copy(pl->link_config.advertising, config.advertising); 2654 } else if (!linkmode_equal(pl->link_config.advertising, 2655 config.advertising)) { 2656 linkmode_copy(pl->link_config.advertising, config.advertising); 2657 phylink_change_inband_advert(pl); 2658 } 2659 mutex_unlock(&pl->state_mutex); 2660 2661 return 0; 2662 } 2663 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set); 2664 2665 /** 2666 * phylink_ethtool_nway_reset() - restart negotiation 2667 * @pl: a pointer to a &struct phylink returned from phylink_create() 2668 * 2669 * Restart negotiation for the phylink instance specified by @pl. This will 2670 * cause any attached phy to restart negotiation with the link partner, and 2671 * if the MAC is in a BaseX mode, the MAC will also be requested to restart 2672 * negotiation. 2673 * 2674 * Returns zero on success, or negative error code. 2675 */ 2676 int phylink_ethtool_nway_reset(struct phylink *pl) 2677 { 2678 int ret = 0; 2679 2680 ASSERT_RTNL(); 2681 2682 if (pl->phydev) 2683 ret = phy_restart_aneg(pl->phydev); 2684 phylink_pcs_an_restart(pl); 2685 2686 return ret; 2687 } 2688 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset); 2689 2690 /** 2691 * phylink_ethtool_get_pauseparam() - get the current pause parameters 2692 * @pl: a pointer to a &struct phylink returned from phylink_create() 2693 * @pause: a pointer to a &struct ethtool_pauseparam 2694 */ 2695 void phylink_ethtool_get_pauseparam(struct phylink *pl, 2696 struct ethtool_pauseparam *pause) 2697 { 2698 ASSERT_RTNL(); 2699 2700 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN); 2701 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX); 2702 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX); 2703 } 2704 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam); 2705 2706 /** 2707 * phylink_ethtool_set_pauseparam() - set the current pause parameters 2708 * @pl: a pointer to a &struct phylink returned from phylink_create() 2709 * @pause: a pointer to a &struct ethtool_pauseparam 2710 */ 2711 int phylink_ethtool_set_pauseparam(struct phylink *pl, 2712 struct ethtool_pauseparam *pause) 2713 { 2714 struct phylink_link_state *config = &pl->link_config; 2715 bool manual_changed; 2716 int pause_state; 2717 2718 ASSERT_RTNL(); 2719 2720 if (pl->cur_link_an_mode == MLO_AN_FIXED) 2721 return -EOPNOTSUPP; 2722 2723 if (!phylink_test(pl->supported, Pause) && 2724 !phylink_test(pl->supported, Asym_Pause)) 2725 return -EOPNOTSUPP; 2726 2727 if (!phylink_test(pl->supported, Asym_Pause) && 2728 pause->rx_pause != pause->tx_pause) 2729 return -EINVAL; 2730 2731 pause_state = 0; 2732 if (pause->autoneg) 2733 pause_state |= MLO_PAUSE_AN; 2734 if (pause->rx_pause) 2735 pause_state |= MLO_PAUSE_RX; 2736 if (pause->tx_pause) 2737 pause_state |= MLO_PAUSE_TX; 2738 2739 mutex_lock(&pl->state_mutex); 2740 /* 2741 * See the comments for linkmode_set_pause(), wrt the deficiencies 2742 * with the current implementation. A solution to this issue would 2743 * be: 2744 * ethtool Local device 2745 * rx tx Pause AsymDir 2746 * 0 0 0 0 2747 * 1 0 1 1 2748 * 0 1 0 1 2749 * 1 1 1 1 2750 * and then use the ethtool rx/tx enablement status to mask the 2751 * rx/tx pause resolution. 2752 */ 2753 linkmode_set_pause(config->advertising, pause->tx_pause, 2754 pause->rx_pause); 2755 2756 manual_changed = (config->pause ^ pause_state) & MLO_PAUSE_AN || 2757 (!(pause_state & MLO_PAUSE_AN) && 2758 (config->pause ^ pause_state) & MLO_PAUSE_TXRX_MASK); 2759 2760 config->pause = pause_state; 2761 2762 /* Update our in-band advertisement, triggering a renegotiation if 2763 * the advertisement changed. 2764 */ 2765 if (!pl->phydev) 2766 phylink_change_inband_advert(pl); 2767 2768 mutex_unlock(&pl->state_mutex); 2769 2770 /* If we have a PHY, a change of the pause frame advertisement will 2771 * cause phylib to renegotiate (if AN is enabled) which will in turn 2772 * call our phylink_phy_change() and trigger a resolve. Note that 2773 * we can't hold our state mutex while calling phy_set_asym_pause(). 2774 */ 2775 if (pl->phydev) 2776 phy_set_asym_pause(pl->phydev, pause->rx_pause, 2777 pause->tx_pause); 2778 2779 /* If the manual pause settings changed, make sure we trigger a 2780 * resolve to update their state; we can not guarantee that the 2781 * link will cycle. 2782 */ 2783 if (manual_changed) { 2784 pl->link_failed = true; 2785 phylink_run_resolve(pl); 2786 } 2787 2788 return 0; 2789 } 2790 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam); 2791 2792 /** 2793 * phylink_get_eee_err() - read the energy efficient ethernet error 2794 * counter 2795 * @pl: a pointer to a &struct phylink returned from phylink_create(). 2796 * 2797 * Read the Energy Efficient Ethernet error counter from the PHY associated 2798 * with the phylink instance specified by @pl. 2799 * 2800 * Returns positive error counter value, or negative error code. 2801 */ 2802 int phylink_get_eee_err(struct phylink *pl) 2803 { 2804 int ret = 0; 2805 2806 ASSERT_RTNL(); 2807 2808 if (pl->phydev) 2809 ret = phy_get_eee_err(pl->phydev); 2810 2811 return ret; 2812 } 2813 EXPORT_SYMBOL_GPL(phylink_get_eee_err); 2814 2815 /** 2816 * phylink_init_eee() - init and check the EEE features 2817 * @pl: a pointer to a &struct phylink returned from phylink_create() 2818 * @clk_stop_enable: allow PHY to stop receive clock 2819 * 2820 * Must be called either with RTNL held or within mac_link_up() 2821 */ 2822 int phylink_init_eee(struct phylink *pl, bool clk_stop_enable) 2823 { 2824 int ret = -EOPNOTSUPP; 2825 2826 if (pl->phydev) 2827 ret = phy_init_eee(pl->phydev, clk_stop_enable); 2828 2829 return ret; 2830 } 2831 EXPORT_SYMBOL_GPL(phylink_init_eee); 2832 2833 /** 2834 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters 2835 * @pl: a pointer to a &struct phylink returned from phylink_create() 2836 * @eee: a pointer to a &struct ethtool_keee for the read parameters 2837 */ 2838 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_keee *eee) 2839 { 2840 int ret = -EOPNOTSUPP; 2841 2842 ASSERT_RTNL(); 2843 2844 if (pl->phydev) 2845 ret = phy_ethtool_get_eee(pl->phydev, eee); 2846 2847 return ret; 2848 } 2849 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee); 2850 2851 /** 2852 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters 2853 * @pl: a pointer to a &struct phylink returned from phylink_create() 2854 * @eee: a pointer to a &struct ethtool_keee for the desired parameters 2855 */ 2856 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_keee *eee) 2857 { 2858 int ret = -EOPNOTSUPP; 2859 2860 ASSERT_RTNL(); 2861 2862 if (pl->phydev) 2863 ret = phy_ethtool_set_eee(pl->phydev, eee); 2864 2865 return ret; 2866 } 2867 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee); 2868 2869 /* This emulates MII registers for a fixed-mode phy operating as per the 2870 * passed in state. "aneg" defines if we report negotiation is possible. 2871 * 2872 * FIXME: should deal with negotiation state too. 2873 */ 2874 static int phylink_mii_emul_read(unsigned int reg, 2875 struct phylink_link_state *state) 2876 { 2877 struct fixed_phy_status fs; 2878 unsigned long *lpa = state->lp_advertising; 2879 int val; 2880 2881 fs.link = state->link; 2882 fs.speed = state->speed; 2883 fs.duplex = state->duplex; 2884 fs.pause = test_bit(ETHTOOL_LINK_MODE_Pause_BIT, lpa); 2885 fs.asym_pause = test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, lpa); 2886 2887 val = swphy_read_reg(reg, &fs); 2888 if (reg == MII_BMSR) { 2889 if (!state->an_complete) 2890 val &= ~BMSR_ANEGCOMPLETE; 2891 } 2892 return val; 2893 } 2894 2895 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id, 2896 unsigned int reg) 2897 { 2898 struct phy_device *phydev = pl->phydev; 2899 int prtad, devad; 2900 2901 if (mdio_phy_id_is_c45(phy_id)) { 2902 prtad = mdio_phy_id_prtad(phy_id); 2903 devad = mdio_phy_id_devad(phy_id); 2904 return mdiobus_c45_read(pl->phydev->mdio.bus, prtad, devad, 2905 reg); 2906 } 2907 2908 if (phydev->is_c45) { 2909 switch (reg) { 2910 case MII_BMCR: 2911 case MII_BMSR: 2912 case MII_PHYSID1: 2913 case MII_PHYSID2: 2914 devad = __ffs(phydev->c45_ids.mmds_present); 2915 break; 2916 case MII_ADVERTISE: 2917 case MII_LPA: 2918 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 2919 return -EINVAL; 2920 devad = MDIO_MMD_AN; 2921 if (reg == MII_ADVERTISE) 2922 reg = MDIO_AN_ADVERTISE; 2923 else 2924 reg = MDIO_AN_LPA; 2925 break; 2926 default: 2927 return -EINVAL; 2928 } 2929 prtad = phy_id; 2930 return mdiobus_c45_read(pl->phydev->mdio.bus, prtad, devad, 2931 reg); 2932 } 2933 2934 return mdiobus_read(pl->phydev->mdio.bus, phy_id, reg); 2935 } 2936 2937 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id, 2938 unsigned int reg, unsigned int val) 2939 { 2940 struct phy_device *phydev = pl->phydev; 2941 int prtad, devad; 2942 2943 if (mdio_phy_id_is_c45(phy_id)) { 2944 prtad = mdio_phy_id_prtad(phy_id); 2945 devad = mdio_phy_id_devad(phy_id); 2946 return mdiobus_c45_write(pl->phydev->mdio.bus, prtad, devad, 2947 reg, val); 2948 } 2949 2950 if (phydev->is_c45) { 2951 switch (reg) { 2952 case MII_BMCR: 2953 case MII_BMSR: 2954 case MII_PHYSID1: 2955 case MII_PHYSID2: 2956 devad = __ffs(phydev->c45_ids.mmds_present); 2957 break; 2958 case MII_ADVERTISE: 2959 case MII_LPA: 2960 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 2961 return -EINVAL; 2962 devad = MDIO_MMD_AN; 2963 if (reg == MII_ADVERTISE) 2964 reg = MDIO_AN_ADVERTISE; 2965 else 2966 reg = MDIO_AN_LPA; 2967 break; 2968 default: 2969 return -EINVAL; 2970 } 2971 return mdiobus_c45_write(pl->phydev->mdio.bus, phy_id, devad, 2972 reg, val); 2973 } 2974 2975 return mdiobus_write(phydev->mdio.bus, phy_id, reg, val); 2976 } 2977 2978 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id, 2979 unsigned int reg) 2980 { 2981 struct phylink_link_state state; 2982 int val = 0xffff; 2983 2984 switch (pl->cur_link_an_mode) { 2985 case MLO_AN_FIXED: 2986 if (phy_id == 0) { 2987 phylink_get_fixed_state(pl, &state); 2988 val = phylink_mii_emul_read(reg, &state); 2989 } 2990 break; 2991 2992 case MLO_AN_PHY: 2993 return -EOPNOTSUPP; 2994 2995 case MLO_AN_INBAND: 2996 if (phy_id == 0) { 2997 phylink_mac_pcs_get_state(pl, &state); 2998 val = phylink_mii_emul_read(reg, &state); 2999 } 3000 break; 3001 } 3002 3003 return val & 0xffff; 3004 } 3005 3006 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id, 3007 unsigned int reg, unsigned int val) 3008 { 3009 switch (pl->cur_link_an_mode) { 3010 case MLO_AN_FIXED: 3011 break; 3012 3013 case MLO_AN_PHY: 3014 return -EOPNOTSUPP; 3015 3016 case MLO_AN_INBAND: 3017 break; 3018 } 3019 3020 return 0; 3021 } 3022 3023 /** 3024 * phylink_mii_ioctl() - generic mii ioctl interface 3025 * @pl: a pointer to a &struct phylink returned from phylink_create() 3026 * @ifr: a pointer to a &struct ifreq for socket ioctls 3027 * @cmd: ioctl cmd to execute 3028 * 3029 * Perform the specified MII ioctl on the PHY attached to the phylink instance 3030 * specified by @pl. If no PHY is attached, emulate the presence of the PHY. 3031 * 3032 * Returns: zero on success or negative error code. 3033 * 3034 * %SIOCGMIIPHY: 3035 * read register from the current PHY. 3036 * %SIOCGMIIREG: 3037 * read register from the specified PHY. 3038 * %SIOCSMIIREG: 3039 * set a register on the specified PHY. 3040 */ 3041 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd) 3042 { 3043 struct mii_ioctl_data *mii = if_mii(ifr); 3044 int ret; 3045 3046 ASSERT_RTNL(); 3047 3048 if (pl->phydev) { 3049 /* PHYs only exist for MLO_AN_PHY and SGMII */ 3050 switch (cmd) { 3051 case SIOCGMIIPHY: 3052 mii->phy_id = pl->phydev->mdio.addr; 3053 fallthrough; 3054 3055 case SIOCGMIIREG: 3056 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num); 3057 if (ret >= 0) { 3058 mii->val_out = ret; 3059 ret = 0; 3060 } 3061 break; 3062 3063 case SIOCSMIIREG: 3064 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num, 3065 mii->val_in); 3066 break; 3067 3068 default: 3069 ret = phy_mii_ioctl(pl->phydev, ifr, cmd); 3070 break; 3071 } 3072 } else { 3073 switch (cmd) { 3074 case SIOCGMIIPHY: 3075 mii->phy_id = 0; 3076 fallthrough; 3077 3078 case SIOCGMIIREG: 3079 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num); 3080 if (ret >= 0) { 3081 mii->val_out = ret; 3082 ret = 0; 3083 } 3084 break; 3085 3086 case SIOCSMIIREG: 3087 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num, 3088 mii->val_in); 3089 break; 3090 3091 default: 3092 ret = -EOPNOTSUPP; 3093 break; 3094 } 3095 } 3096 3097 return ret; 3098 } 3099 EXPORT_SYMBOL_GPL(phylink_mii_ioctl); 3100 3101 /** 3102 * phylink_speed_down() - set the non-SFP PHY to lowest speed supported by both 3103 * link partners 3104 * @pl: a pointer to a &struct phylink returned from phylink_create() 3105 * @sync: perform action synchronously 3106 * 3107 * If we have a PHY that is not part of a SFP module, then set the speed 3108 * as described in the phy_speed_down() function. Please see this function 3109 * for a description of the @sync parameter. 3110 * 3111 * Returns zero if there is no PHY, otherwise as per phy_speed_down(). 3112 */ 3113 int phylink_speed_down(struct phylink *pl, bool sync) 3114 { 3115 int ret = 0; 3116 3117 ASSERT_RTNL(); 3118 3119 if (!pl->sfp_bus && pl->phydev) 3120 ret = phy_speed_down(pl->phydev, sync); 3121 3122 return ret; 3123 } 3124 EXPORT_SYMBOL_GPL(phylink_speed_down); 3125 3126 /** 3127 * phylink_speed_up() - restore the advertised speeds prior to the call to 3128 * phylink_speed_down() 3129 * @pl: a pointer to a &struct phylink returned from phylink_create() 3130 * 3131 * If we have a PHY that is not part of a SFP module, then restore the 3132 * PHY speeds as per phy_speed_up(). 3133 * 3134 * Returns zero if there is no PHY, otherwise as per phy_speed_up(). 3135 */ 3136 int phylink_speed_up(struct phylink *pl) 3137 { 3138 int ret = 0; 3139 3140 ASSERT_RTNL(); 3141 3142 if (!pl->sfp_bus && pl->phydev) 3143 ret = phy_speed_up(pl->phydev); 3144 3145 return ret; 3146 } 3147 EXPORT_SYMBOL_GPL(phylink_speed_up); 3148 3149 static void phylink_sfp_attach(void *upstream, struct sfp_bus *bus) 3150 { 3151 struct phylink *pl = upstream; 3152 3153 pl->netdev->sfp_bus = bus; 3154 } 3155 3156 static void phylink_sfp_detach(void *upstream, struct sfp_bus *bus) 3157 { 3158 struct phylink *pl = upstream; 3159 3160 pl->netdev->sfp_bus = NULL; 3161 } 3162 3163 static phy_interface_t phylink_choose_sfp_interface(struct phylink *pl, 3164 const unsigned long *intf) 3165 { 3166 phy_interface_t interface; 3167 size_t i; 3168 3169 interface = PHY_INTERFACE_MODE_NA; 3170 for (i = 0; i < ARRAY_SIZE(phylink_sfp_interface_preference); i++) 3171 if (test_bit(phylink_sfp_interface_preference[i], intf)) { 3172 interface = phylink_sfp_interface_preference[i]; 3173 break; 3174 } 3175 3176 return interface; 3177 } 3178 3179 static void phylink_sfp_set_config(struct phylink *pl, u8 mode, 3180 unsigned long *supported, 3181 struct phylink_link_state *state) 3182 { 3183 bool changed = false; 3184 3185 phylink_dbg(pl, "requesting link mode %s/%s with support %*pb\n", 3186 phylink_an_mode_str(mode), phy_modes(state->interface), 3187 __ETHTOOL_LINK_MODE_MASK_NBITS, supported); 3188 3189 if (!linkmode_equal(pl->supported, supported)) { 3190 linkmode_copy(pl->supported, supported); 3191 changed = true; 3192 } 3193 3194 if (!linkmode_equal(pl->link_config.advertising, state->advertising)) { 3195 linkmode_copy(pl->link_config.advertising, state->advertising); 3196 changed = true; 3197 } 3198 3199 if (pl->cur_link_an_mode != mode || 3200 pl->link_config.interface != state->interface) { 3201 pl->cur_link_an_mode = mode; 3202 pl->link_config.interface = state->interface; 3203 3204 changed = true; 3205 3206 phylink_info(pl, "switched to %s/%s link mode\n", 3207 phylink_an_mode_str(mode), 3208 phy_modes(state->interface)); 3209 } 3210 3211 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED, 3212 &pl->phylink_disable_state)) 3213 phylink_mac_initial_config(pl, false); 3214 } 3215 3216 static int phylink_sfp_config_phy(struct phylink *pl, u8 mode, 3217 struct phy_device *phy) 3218 { 3219 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 3220 struct phylink_link_state config; 3221 int ret; 3222 3223 linkmode_copy(support, phy->supported); 3224 3225 memset(&config, 0, sizeof(config)); 3226 linkmode_copy(config.advertising, phy->advertising); 3227 config.interface = PHY_INTERFACE_MODE_NA; 3228 config.speed = SPEED_UNKNOWN; 3229 config.duplex = DUPLEX_UNKNOWN; 3230 config.pause = MLO_PAUSE_AN; 3231 3232 /* Ignore errors if we're expecting a PHY to attach later */ 3233 ret = phylink_validate(pl, support, &config); 3234 if (ret) { 3235 phylink_err(pl, "validation with support %*pb failed: %pe\n", 3236 __ETHTOOL_LINK_MODE_MASK_NBITS, support, 3237 ERR_PTR(ret)); 3238 return ret; 3239 } 3240 3241 config.interface = phylink_sfp_select_interface(pl, config.advertising); 3242 if (config.interface == PHY_INTERFACE_MODE_NA) 3243 return -EINVAL; 3244 3245 /* Attach the PHY so that the PHY is present when we do the major 3246 * configuration step. 3247 */ 3248 ret = phylink_attach_phy(pl, phy, config.interface); 3249 if (ret < 0) 3250 return ret; 3251 3252 /* This will validate the configuration for us. */ 3253 ret = phylink_bringup_phy(pl, phy, config.interface); 3254 if (ret < 0) { 3255 phy_detach(phy); 3256 return ret; 3257 } 3258 3259 pl->link_port = pl->sfp_port; 3260 3261 phylink_sfp_set_config(pl, mode, support, &config); 3262 3263 return 0; 3264 } 3265 3266 static int phylink_sfp_config_optical(struct phylink *pl) 3267 { 3268 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 3269 DECLARE_PHY_INTERFACE_MASK(interfaces); 3270 struct phylink_link_state config; 3271 phy_interface_t interface; 3272 int ret; 3273 3274 phylink_dbg(pl, "optical SFP: interfaces=[mac=%*pbl, sfp=%*pbl]\n", 3275 (int)PHY_INTERFACE_MODE_MAX, 3276 pl->config->supported_interfaces, 3277 (int)PHY_INTERFACE_MODE_MAX, 3278 pl->sfp_interfaces); 3279 3280 /* Find the union of the supported interfaces by the PCS/MAC and 3281 * the SFP module. 3282 */ 3283 phy_interface_and(interfaces, pl->config->supported_interfaces, 3284 pl->sfp_interfaces); 3285 if (phy_interface_empty(interfaces)) { 3286 phylink_err(pl, "unsupported SFP module: no common interface modes\n"); 3287 return -EINVAL; 3288 } 3289 3290 memset(&config, 0, sizeof(config)); 3291 linkmode_copy(support, pl->sfp_support); 3292 linkmode_copy(config.advertising, pl->sfp_support); 3293 config.speed = SPEED_UNKNOWN; 3294 config.duplex = DUPLEX_UNKNOWN; 3295 config.pause = MLO_PAUSE_AN; 3296 3297 /* For all the interfaces that are supported, reduce the sfp_support 3298 * mask to only those link modes that can be supported. 3299 */ 3300 ret = phylink_validate_mask(pl, NULL, pl->sfp_support, &config, 3301 interfaces); 3302 if (ret) { 3303 phylink_err(pl, "unsupported SFP module: validation with support %*pb failed\n", 3304 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 3305 return ret; 3306 } 3307 3308 interface = phylink_choose_sfp_interface(pl, interfaces); 3309 if (interface == PHY_INTERFACE_MODE_NA) { 3310 phylink_err(pl, "failed to select SFP interface\n"); 3311 return -EINVAL; 3312 } 3313 3314 phylink_dbg(pl, "optical SFP: chosen %s interface\n", 3315 phy_modes(interface)); 3316 3317 config.interface = interface; 3318 3319 /* Ignore errors if we're expecting a PHY to attach later */ 3320 ret = phylink_validate(pl, support, &config); 3321 if (ret) { 3322 phylink_err(pl, "validation with support %*pb failed: %pe\n", 3323 __ETHTOOL_LINK_MODE_MASK_NBITS, support, 3324 ERR_PTR(ret)); 3325 return ret; 3326 } 3327 3328 pl->link_port = pl->sfp_port; 3329 3330 phylink_sfp_set_config(pl, MLO_AN_INBAND, pl->sfp_support, &config); 3331 3332 return 0; 3333 } 3334 3335 static int phylink_sfp_module_insert(void *upstream, 3336 const struct sfp_eeprom_id *id) 3337 { 3338 struct phylink *pl = upstream; 3339 3340 ASSERT_RTNL(); 3341 3342 linkmode_zero(pl->sfp_support); 3343 phy_interface_zero(pl->sfp_interfaces); 3344 sfp_parse_support(pl->sfp_bus, id, pl->sfp_support, pl->sfp_interfaces); 3345 pl->sfp_port = sfp_parse_port(pl->sfp_bus, id, pl->sfp_support); 3346 3347 /* If this module may have a PHY connecting later, defer until later */ 3348 pl->sfp_may_have_phy = sfp_may_have_phy(pl->sfp_bus, id); 3349 if (pl->sfp_may_have_phy) 3350 return 0; 3351 3352 return phylink_sfp_config_optical(pl); 3353 } 3354 3355 static int phylink_sfp_module_start(void *upstream) 3356 { 3357 struct phylink *pl = upstream; 3358 3359 /* If this SFP module has a PHY, start the PHY now. */ 3360 if (pl->phydev) { 3361 phy_start(pl->phydev); 3362 return 0; 3363 } 3364 3365 /* If the module may have a PHY but we didn't detect one we 3366 * need to configure the MAC here. 3367 */ 3368 if (!pl->sfp_may_have_phy) 3369 return 0; 3370 3371 return phylink_sfp_config_optical(pl); 3372 } 3373 3374 static void phylink_sfp_module_stop(void *upstream) 3375 { 3376 struct phylink *pl = upstream; 3377 3378 /* If this SFP module has a PHY, stop it. */ 3379 if (pl->phydev) 3380 phy_stop(pl->phydev); 3381 } 3382 3383 static void phylink_sfp_link_down(void *upstream) 3384 { 3385 struct phylink *pl = upstream; 3386 3387 ASSERT_RTNL(); 3388 3389 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_LINK); 3390 } 3391 3392 static void phylink_sfp_link_up(void *upstream) 3393 { 3394 struct phylink *pl = upstream; 3395 3396 ASSERT_RTNL(); 3397 3398 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_LINK); 3399 } 3400 3401 /* The Broadcom BCM84881 in the Methode DM7052 is unable to provide a SGMII 3402 * or 802.3z control word, so inband will not work. 3403 */ 3404 static bool phylink_phy_no_inband(struct phy_device *phy) 3405 { 3406 return phy->is_c45 && phy_id_compare(phy->c45_ids.device_ids[1], 3407 0xae025150, 0xfffffff0); 3408 } 3409 3410 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy) 3411 { 3412 struct phylink *pl = upstream; 3413 u8 mode; 3414 3415 /* 3416 * This is the new way of dealing with flow control for PHYs, 3417 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 3418 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 3419 * using our validate call to the MAC, we rely upon the MAC 3420 * clearing the bits from both supported and advertising fields. 3421 */ 3422 phy_support_asym_pause(phy); 3423 3424 if (phylink_phy_no_inband(phy)) 3425 mode = MLO_AN_PHY; 3426 else 3427 mode = MLO_AN_INBAND; 3428 3429 /* Set the PHY's host supported interfaces */ 3430 phy_interface_and(phy->host_interfaces, phylink_sfp_interfaces, 3431 pl->config->supported_interfaces); 3432 3433 /* Do the initial configuration */ 3434 return phylink_sfp_config_phy(pl, mode, phy); 3435 } 3436 3437 static void phylink_sfp_disconnect_phy(void *upstream, 3438 struct phy_device *phydev) 3439 { 3440 phylink_disconnect_phy(upstream); 3441 } 3442 3443 static const struct sfp_upstream_ops sfp_phylink_ops = { 3444 .attach = phylink_sfp_attach, 3445 .detach = phylink_sfp_detach, 3446 .module_insert = phylink_sfp_module_insert, 3447 .module_start = phylink_sfp_module_start, 3448 .module_stop = phylink_sfp_module_stop, 3449 .link_up = phylink_sfp_link_up, 3450 .link_down = phylink_sfp_link_down, 3451 .connect_phy = phylink_sfp_connect_phy, 3452 .disconnect_phy = phylink_sfp_disconnect_phy, 3453 }; 3454 3455 /* Helpers for MAC drivers */ 3456 3457 static struct { 3458 int bit; 3459 int speed; 3460 } phylink_c73_priority_resolution[] = { 3461 { ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT, SPEED_100000 }, 3462 { ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT, SPEED_100000 }, 3463 /* 100GBASE-KP4 and 100GBASE-CR10 not supported */ 3464 { ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT, SPEED_40000 }, 3465 { ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT, SPEED_40000 }, 3466 { ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, SPEED_10000 }, 3467 { ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, SPEED_10000 }, 3468 /* 5GBASE-KR not supported */ 3469 { ETHTOOL_LINK_MODE_2500baseX_Full_BIT, SPEED_2500 }, 3470 { ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, SPEED_1000 }, 3471 }; 3472 3473 void phylink_resolve_c73(struct phylink_link_state *state) 3474 { 3475 int i; 3476 3477 for (i = 0; i < ARRAY_SIZE(phylink_c73_priority_resolution); i++) { 3478 int bit = phylink_c73_priority_resolution[i].bit; 3479 if (linkmode_test_bit(bit, state->advertising) && 3480 linkmode_test_bit(bit, state->lp_advertising)) 3481 break; 3482 } 3483 3484 if (i < ARRAY_SIZE(phylink_c73_priority_resolution)) { 3485 state->speed = phylink_c73_priority_resolution[i].speed; 3486 state->duplex = DUPLEX_FULL; 3487 } else { 3488 /* negotiation failure */ 3489 state->link = false; 3490 } 3491 3492 phylink_resolve_an_pause(state); 3493 } 3494 EXPORT_SYMBOL_GPL(phylink_resolve_c73); 3495 3496 static void phylink_decode_c37_word(struct phylink_link_state *state, 3497 uint16_t config_reg, int speed) 3498 { 3499 int fd_bit; 3500 3501 if (speed == SPEED_2500) 3502 fd_bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT; 3503 else 3504 fd_bit = ETHTOOL_LINK_MODE_1000baseX_Full_BIT; 3505 3506 mii_lpa_mod_linkmode_x(state->lp_advertising, config_reg, fd_bit); 3507 3508 if (linkmode_test_bit(fd_bit, state->advertising) && 3509 linkmode_test_bit(fd_bit, state->lp_advertising)) { 3510 state->speed = speed; 3511 state->duplex = DUPLEX_FULL; 3512 } else { 3513 /* negotiation failure */ 3514 state->link = false; 3515 } 3516 3517 phylink_resolve_an_pause(state); 3518 } 3519 3520 static void phylink_decode_sgmii_word(struct phylink_link_state *state, 3521 uint16_t config_reg) 3522 { 3523 if (!(config_reg & LPA_SGMII_LINK)) { 3524 state->link = false; 3525 return; 3526 } 3527 3528 switch (config_reg & LPA_SGMII_SPD_MASK) { 3529 case LPA_SGMII_10: 3530 state->speed = SPEED_10; 3531 break; 3532 case LPA_SGMII_100: 3533 state->speed = SPEED_100; 3534 break; 3535 case LPA_SGMII_1000: 3536 state->speed = SPEED_1000; 3537 break; 3538 default: 3539 state->link = false; 3540 return; 3541 } 3542 if (config_reg & LPA_SGMII_FULL_DUPLEX) 3543 state->duplex = DUPLEX_FULL; 3544 else 3545 state->duplex = DUPLEX_HALF; 3546 } 3547 3548 /** 3549 * phylink_decode_usxgmii_word() - decode the USXGMII word from a MAC PCS 3550 * @state: a pointer to a struct phylink_link_state. 3551 * @lpa: a 16 bit value which stores the USXGMII auto-negotiation word 3552 * 3553 * Helper for MAC PCS supporting the USXGMII protocol and the auto-negotiation 3554 * code word. Decode the USXGMII code word and populate the corresponding fields 3555 * (speed, duplex) into the phylink_link_state structure. 3556 */ 3557 void phylink_decode_usxgmii_word(struct phylink_link_state *state, 3558 uint16_t lpa) 3559 { 3560 switch (lpa & MDIO_USXGMII_SPD_MASK) { 3561 case MDIO_USXGMII_10: 3562 state->speed = SPEED_10; 3563 break; 3564 case MDIO_USXGMII_100: 3565 state->speed = SPEED_100; 3566 break; 3567 case MDIO_USXGMII_1000: 3568 state->speed = SPEED_1000; 3569 break; 3570 case MDIO_USXGMII_2500: 3571 state->speed = SPEED_2500; 3572 break; 3573 case MDIO_USXGMII_5000: 3574 state->speed = SPEED_5000; 3575 break; 3576 case MDIO_USXGMII_10G: 3577 state->speed = SPEED_10000; 3578 break; 3579 default: 3580 state->link = false; 3581 return; 3582 } 3583 3584 if (lpa & MDIO_USXGMII_FULL_DUPLEX) 3585 state->duplex = DUPLEX_FULL; 3586 else 3587 state->duplex = DUPLEX_HALF; 3588 } 3589 EXPORT_SYMBOL_GPL(phylink_decode_usxgmii_word); 3590 3591 /** 3592 * phylink_decode_usgmii_word() - decode the USGMII word from a MAC PCS 3593 * @state: a pointer to a struct phylink_link_state. 3594 * @lpa: a 16 bit value which stores the USGMII auto-negotiation word 3595 * 3596 * Helper for MAC PCS supporting the USGMII protocol and the auto-negotiation 3597 * code word. Decode the USGMII code word and populate the corresponding fields 3598 * (speed, duplex) into the phylink_link_state structure. The structure for this 3599 * word is the same as the USXGMII word, except it only supports speeds up to 3600 * 1Gbps. 3601 */ 3602 static void phylink_decode_usgmii_word(struct phylink_link_state *state, 3603 uint16_t lpa) 3604 { 3605 switch (lpa & MDIO_USXGMII_SPD_MASK) { 3606 case MDIO_USXGMII_10: 3607 state->speed = SPEED_10; 3608 break; 3609 case MDIO_USXGMII_100: 3610 state->speed = SPEED_100; 3611 break; 3612 case MDIO_USXGMII_1000: 3613 state->speed = SPEED_1000; 3614 break; 3615 default: 3616 state->link = false; 3617 return; 3618 } 3619 3620 if (lpa & MDIO_USXGMII_FULL_DUPLEX) 3621 state->duplex = DUPLEX_FULL; 3622 else 3623 state->duplex = DUPLEX_HALF; 3624 } 3625 3626 /** 3627 * phylink_mii_c22_pcs_decode_state() - Decode MAC PCS state from MII registers 3628 * @state: a pointer to a &struct phylink_link_state. 3629 * @bmsr: The value of the %MII_BMSR register 3630 * @lpa: The value of the %MII_LPA register 3631 * 3632 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 3633 * clause 37 negotiation and/or SGMII control. 3634 * 3635 * Parse the Clause 37 or Cisco SGMII link partner negotiation word into 3636 * the phylink @state structure. This is suitable to be used for implementing 3637 * the pcs_get_state() member of the struct phylink_pcs_ops structure if 3638 * accessing @bmsr and @lpa cannot be done with MDIO directly. 3639 */ 3640 void phylink_mii_c22_pcs_decode_state(struct phylink_link_state *state, 3641 u16 bmsr, u16 lpa) 3642 { 3643 state->link = !!(bmsr & BMSR_LSTATUS); 3644 state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE); 3645 /* If there is no link or autonegotiation is disabled, the LP advertisement 3646 * data is not meaningful, so don't go any further. 3647 */ 3648 if (!state->link || !linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 3649 state->advertising)) 3650 return; 3651 3652 switch (state->interface) { 3653 case PHY_INTERFACE_MODE_1000BASEX: 3654 phylink_decode_c37_word(state, lpa, SPEED_1000); 3655 break; 3656 3657 case PHY_INTERFACE_MODE_2500BASEX: 3658 phylink_decode_c37_word(state, lpa, SPEED_2500); 3659 break; 3660 3661 case PHY_INTERFACE_MODE_SGMII: 3662 case PHY_INTERFACE_MODE_QSGMII: 3663 phylink_decode_sgmii_word(state, lpa); 3664 break; 3665 case PHY_INTERFACE_MODE_QUSGMII: 3666 phylink_decode_usgmii_word(state, lpa); 3667 break; 3668 3669 default: 3670 state->link = false; 3671 break; 3672 } 3673 } 3674 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_decode_state); 3675 3676 /** 3677 * phylink_mii_c22_pcs_get_state() - read the MAC PCS state 3678 * @pcs: a pointer to a &struct mdio_device. 3679 * @state: a pointer to a &struct phylink_link_state. 3680 * 3681 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 3682 * clause 37 negotiation and/or SGMII control. 3683 * 3684 * Read the MAC PCS state from the MII device configured in @config and 3685 * parse the Clause 37 or Cisco SGMII link partner negotiation word into 3686 * the phylink @state structure. This is suitable to be directly plugged 3687 * into the pcs_get_state() member of the struct phylink_pcs_ops 3688 * structure. 3689 */ 3690 void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs, 3691 struct phylink_link_state *state) 3692 { 3693 int bmsr, lpa; 3694 3695 bmsr = mdiodev_read(pcs, MII_BMSR); 3696 lpa = mdiodev_read(pcs, MII_LPA); 3697 if (bmsr < 0 || lpa < 0) { 3698 state->link = false; 3699 return; 3700 } 3701 3702 phylink_mii_c22_pcs_decode_state(state, bmsr, lpa); 3703 } 3704 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_get_state); 3705 3706 /** 3707 * phylink_mii_c22_pcs_encode_advertisement() - configure the clause 37 PCS 3708 * advertisement 3709 * @interface: the PHY interface mode being configured 3710 * @advertising: the ethtool advertisement mask 3711 * 3712 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 3713 * clause 37 negotiation and/or SGMII control. 3714 * 3715 * Encode the clause 37 PCS advertisement as specified by @interface and 3716 * @advertising. 3717 * 3718 * Return: The new value for @adv, or ``-EINVAL`` if it should not be changed. 3719 */ 3720 int phylink_mii_c22_pcs_encode_advertisement(phy_interface_t interface, 3721 const unsigned long *advertising) 3722 { 3723 u16 adv; 3724 3725 switch (interface) { 3726 case PHY_INTERFACE_MODE_1000BASEX: 3727 case PHY_INTERFACE_MODE_2500BASEX: 3728 adv = ADVERTISE_1000XFULL; 3729 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 3730 advertising)) 3731 adv |= ADVERTISE_1000XPAUSE; 3732 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 3733 advertising)) 3734 adv |= ADVERTISE_1000XPSE_ASYM; 3735 return adv; 3736 case PHY_INTERFACE_MODE_SGMII: 3737 case PHY_INTERFACE_MODE_QSGMII: 3738 return 0x0001; 3739 default: 3740 /* Nothing to do for other modes */ 3741 return -EINVAL; 3742 } 3743 } 3744 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_encode_advertisement); 3745 3746 /** 3747 * phylink_mii_c22_pcs_config() - configure clause 22 PCS 3748 * @pcs: a pointer to a &struct mdio_device. 3749 * @interface: the PHY interface mode being configured 3750 * @advertising: the ethtool advertisement mask 3751 * @neg_mode: PCS negotiation mode 3752 * 3753 * Configure a Clause 22 PCS PHY with the appropriate negotiation 3754 * parameters for the @mode, @interface and @advertising parameters. 3755 * Returns negative error number on failure, zero if the advertisement 3756 * has not changed, or positive if there is a change. 3757 */ 3758 int phylink_mii_c22_pcs_config(struct mdio_device *pcs, 3759 phy_interface_t interface, 3760 const unsigned long *advertising, 3761 unsigned int neg_mode) 3762 { 3763 bool changed = 0; 3764 u16 bmcr; 3765 int ret, adv; 3766 3767 adv = phylink_mii_c22_pcs_encode_advertisement(interface, advertising); 3768 if (adv >= 0) { 3769 ret = mdiobus_modify_changed(pcs->bus, pcs->addr, 3770 MII_ADVERTISE, 0xffff, adv); 3771 if (ret < 0) 3772 return ret; 3773 changed = ret; 3774 } 3775 3776 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) 3777 bmcr = BMCR_ANENABLE; 3778 else 3779 bmcr = 0; 3780 3781 /* Configure the inband state. Ensure ISOLATE bit is disabled */ 3782 ret = mdiodev_modify(pcs, MII_BMCR, BMCR_ANENABLE | BMCR_ISOLATE, bmcr); 3783 if (ret < 0) 3784 return ret; 3785 3786 return changed; 3787 } 3788 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config); 3789 3790 /** 3791 * phylink_mii_c22_pcs_an_restart() - restart 802.3z autonegotiation 3792 * @pcs: a pointer to a &struct mdio_device. 3793 * 3794 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 3795 * clause 37 negotiation. 3796 * 3797 * Restart the clause 37 negotiation with the link partner. This is 3798 * suitable to be directly plugged into the pcs_get_state() member 3799 * of the struct phylink_pcs_ops structure. 3800 */ 3801 void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs) 3802 { 3803 int val = mdiodev_read(pcs, MII_BMCR); 3804 3805 if (val >= 0) { 3806 val |= BMCR_ANRESTART; 3807 3808 mdiodev_write(pcs, MII_BMCR, val); 3809 } 3810 } 3811 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_an_restart); 3812 3813 void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs, 3814 struct phylink_link_state *state) 3815 { 3816 struct mii_bus *bus = pcs->bus; 3817 int addr = pcs->addr; 3818 int stat; 3819 3820 stat = mdiobus_c45_read(bus, addr, MDIO_MMD_PCS, MDIO_STAT1); 3821 if (stat < 0) { 3822 state->link = false; 3823 return; 3824 } 3825 3826 state->link = !!(stat & MDIO_STAT1_LSTATUS); 3827 if (!state->link) 3828 return; 3829 3830 switch (state->interface) { 3831 case PHY_INTERFACE_MODE_10GBASER: 3832 state->speed = SPEED_10000; 3833 state->duplex = DUPLEX_FULL; 3834 break; 3835 3836 default: 3837 break; 3838 } 3839 } 3840 EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state); 3841 3842 static int __init phylink_init(void) 3843 { 3844 for (int i = 0; i < ARRAY_SIZE(phylink_sfp_interface_preference); ++i) 3845 __set_bit(phylink_sfp_interface_preference[i], 3846 phylink_sfp_interfaces); 3847 3848 return 0; 3849 } 3850 3851 module_init(phylink_init); 3852 3853 MODULE_LICENSE("GPL v2"); 3854 MODULE_DESCRIPTION("phylink models the MAC to optional PHY connection"); 3855