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 req_link_an_mode; /* Requested MLO_AN_xxx mode */ 60 u8 act_link_an_mode; /* Active MLO_AN_xxx mode */ 61 u8 link_port; /* The current non-phy ethtool port */ 62 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 63 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported_lpi); 64 65 /* The link configuration settings */ 66 struct phylink_link_state link_config; 67 68 /* The current settings */ 69 phy_interface_t cur_interface; 70 71 struct gpio_desc *link_gpio; 72 unsigned int link_irq; 73 struct timer_list link_poll; 74 void (*get_fixed_state)(struct net_device *dev, 75 struct phylink_link_state *s); 76 77 struct mutex state_mutex; 78 struct phylink_link_state phy_state; 79 unsigned int phy_ib_mode; 80 struct work_struct resolve; 81 unsigned int pcs_neg_mode; 82 unsigned int pcs_state; 83 84 bool link_failed; 85 bool mac_supports_eee_ops; 86 bool mac_supports_eee; 87 bool phy_enable_tx_lpi; 88 bool mac_enable_tx_lpi; 89 bool mac_tx_clk_stop; 90 u32 mac_tx_lpi_timer; 91 92 struct sfp_bus *sfp_bus; 93 bool sfp_may_have_phy; 94 DECLARE_PHY_INTERFACE_MASK(sfp_interfaces); 95 __ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support); 96 u8 sfp_port; 97 98 struct eee_config eee_cfg; 99 }; 100 101 #define phylink_printk(level, pl, fmt, ...) \ 102 do { \ 103 if ((pl)->config->type == PHYLINK_NETDEV) \ 104 netdev_printk(level, (pl)->netdev, fmt, ##__VA_ARGS__); \ 105 else if ((pl)->config->type == PHYLINK_DEV) \ 106 dev_printk(level, (pl)->dev, fmt, ##__VA_ARGS__); \ 107 } while (0) 108 109 #define phylink_err(pl, fmt, ...) \ 110 phylink_printk(KERN_ERR, pl, fmt, ##__VA_ARGS__) 111 #define phylink_warn(pl, fmt, ...) \ 112 phylink_printk(KERN_WARNING, pl, fmt, ##__VA_ARGS__) 113 #define phylink_info(pl, fmt, ...) \ 114 phylink_printk(KERN_INFO, pl, fmt, ##__VA_ARGS__) 115 #if defined(CONFIG_DYNAMIC_DEBUG) 116 #define phylink_dbg(pl, fmt, ...) \ 117 do { \ 118 if ((pl)->config->type == PHYLINK_NETDEV) \ 119 netdev_dbg((pl)->netdev, fmt, ##__VA_ARGS__); \ 120 else if ((pl)->config->type == PHYLINK_DEV) \ 121 dev_dbg((pl)->dev, fmt, ##__VA_ARGS__); \ 122 } while (0) 123 #elif defined(DEBUG) 124 #define phylink_dbg(pl, fmt, ...) \ 125 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__) 126 #else 127 #define phylink_dbg(pl, fmt, ...) \ 128 ({ \ 129 if (0) \ 130 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__); \ 131 }) 132 #endif 133 134 static const phy_interface_t phylink_sfp_interface_preference[] = { 135 PHY_INTERFACE_MODE_25GBASER, 136 PHY_INTERFACE_MODE_USXGMII, 137 PHY_INTERFACE_MODE_10GBASER, 138 PHY_INTERFACE_MODE_5GBASER, 139 PHY_INTERFACE_MODE_2500BASEX, 140 PHY_INTERFACE_MODE_SGMII, 141 PHY_INTERFACE_MODE_1000BASEX, 142 PHY_INTERFACE_MODE_100BASEX, 143 }; 144 145 static DECLARE_PHY_INTERFACE_MASK(phylink_sfp_interfaces); 146 147 /** 148 * phylink_set_port_modes() - set the port type modes in the ethtool mask 149 * @mask: ethtool link mode mask 150 * 151 * Sets all the port type modes in the ethtool mask. MAC drivers should 152 * use this in their 'validate' callback. 153 */ 154 void phylink_set_port_modes(unsigned long *mask) 155 { 156 phylink_set(mask, TP); 157 phylink_set(mask, AUI); 158 phylink_set(mask, MII); 159 phylink_set(mask, FIBRE); 160 phylink_set(mask, BNC); 161 phylink_set(mask, Backplane); 162 } 163 EXPORT_SYMBOL_GPL(phylink_set_port_modes); 164 165 static int phylink_is_empty_linkmode(const unsigned long *linkmode) 166 { 167 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, }; 168 169 phylink_set_port_modes(tmp); 170 phylink_set(tmp, Autoneg); 171 phylink_set(tmp, Pause); 172 phylink_set(tmp, Asym_Pause); 173 174 return linkmode_subset(linkmode, tmp); 175 } 176 177 static const char *phylink_an_mode_str(unsigned int mode) 178 { 179 static const char *modestr[] = { 180 [MLO_AN_PHY] = "phy", 181 [MLO_AN_FIXED] = "fixed", 182 [MLO_AN_INBAND] = "inband", 183 }; 184 185 return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown"; 186 } 187 188 static const char *phylink_pcs_mode_str(unsigned int mode) 189 { 190 if (!mode) 191 return "none"; 192 193 if (mode & PHYLINK_PCS_NEG_OUTBAND) 194 return "outband"; 195 196 if (mode & PHYLINK_PCS_NEG_INBAND) { 197 if (mode & PHYLINK_PCS_NEG_ENABLED) 198 return "inband,an-enabled"; 199 else 200 return "inband,an-disabled"; 201 } 202 203 return "unknown"; 204 } 205 206 static unsigned int phylink_interface_signal_rate(phy_interface_t interface) 207 { 208 switch (interface) { 209 case PHY_INTERFACE_MODE_SGMII: 210 case PHY_INTERFACE_MODE_1000BASEX: /* 1.25Mbd */ 211 return 1250; 212 case PHY_INTERFACE_MODE_2500BASEX: /* 3.125Mbd */ 213 return 3125; 214 case PHY_INTERFACE_MODE_5GBASER: /* 5.15625Mbd */ 215 return 5156; 216 case PHY_INTERFACE_MODE_10GBASER: /* 10.3125Mbd */ 217 return 10313; 218 default: 219 return 0; 220 } 221 } 222 223 /** 224 * phylink_interface_max_speed() - get the maximum speed of a phy interface 225 * @interface: phy interface mode defined by &typedef phy_interface_t 226 * 227 * Determine the maximum speed of a phy interface. This is intended to help 228 * determine the correct speed to pass to the MAC when the phy is performing 229 * rate matching. 230 * 231 * Return: The maximum speed of @interface 232 */ 233 static int phylink_interface_max_speed(phy_interface_t interface) 234 { 235 switch (interface) { 236 case PHY_INTERFACE_MODE_100BASEX: 237 case PHY_INTERFACE_MODE_REVRMII: 238 case PHY_INTERFACE_MODE_RMII: 239 case PHY_INTERFACE_MODE_SMII: 240 case PHY_INTERFACE_MODE_REVMII: 241 case PHY_INTERFACE_MODE_MII: 242 return SPEED_100; 243 244 case PHY_INTERFACE_MODE_TBI: 245 case PHY_INTERFACE_MODE_MOCA: 246 case PHY_INTERFACE_MODE_RTBI: 247 case PHY_INTERFACE_MODE_1000BASEX: 248 case PHY_INTERFACE_MODE_1000BASEKX: 249 case PHY_INTERFACE_MODE_TRGMII: 250 case PHY_INTERFACE_MODE_RGMII_TXID: 251 case PHY_INTERFACE_MODE_RGMII_RXID: 252 case PHY_INTERFACE_MODE_RGMII_ID: 253 case PHY_INTERFACE_MODE_RGMII: 254 case PHY_INTERFACE_MODE_PSGMII: 255 case PHY_INTERFACE_MODE_QSGMII: 256 case PHY_INTERFACE_MODE_QUSGMII: 257 case PHY_INTERFACE_MODE_SGMII: 258 case PHY_INTERFACE_MODE_GMII: 259 return SPEED_1000; 260 261 case PHY_INTERFACE_MODE_2500BASEX: 262 case PHY_INTERFACE_MODE_10G_QXGMII: 263 return SPEED_2500; 264 265 case PHY_INTERFACE_MODE_5GBASER: 266 return SPEED_5000; 267 268 case PHY_INTERFACE_MODE_XGMII: 269 case PHY_INTERFACE_MODE_RXAUI: 270 case PHY_INTERFACE_MODE_XAUI: 271 case PHY_INTERFACE_MODE_10GBASER: 272 case PHY_INTERFACE_MODE_10GKR: 273 case PHY_INTERFACE_MODE_USXGMII: 274 return SPEED_10000; 275 276 case PHY_INTERFACE_MODE_25GBASER: 277 return SPEED_25000; 278 279 case PHY_INTERFACE_MODE_XLGMII: 280 return SPEED_40000; 281 282 case PHY_INTERFACE_MODE_INTERNAL: 283 case PHY_INTERFACE_MODE_NA: 284 case PHY_INTERFACE_MODE_MAX: 285 /* No idea! Garbage in, unknown out */ 286 return SPEED_UNKNOWN; 287 } 288 289 /* If we get here, someone forgot to add an interface mode above */ 290 WARN_ON_ONCE(1); 291 return SPEED_UNKNOWN; 292 } 293 294 /** 295 * phylink_caps_to_linkmodes() - Convert capabilities to ethtool link modes 296 * @linkmodes: ethtool linkmode mask (must be already initialised) 297 * @caps: bitmask of MAC capabilities 298 * 299 * Set all possible pause, speed and duplex linkmodes in @linkmodes that are 300 * supported by the @caps. @linkmodes must have been initialised previously. 301 */ 302 static void phylink_caps_to_linkmodes(unsigned long *linkmodes, 303 unsigned long caps) 304 { 305 if (caps & MAC_SYM_PAUSE) 306 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, linkmodes); 307 308 if (caps & MAC_ASYM_PAUSE) 309 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, linkmodes); 310 311 if (caps & MAC_10HD) { 312 __set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, linkmodes); 313 __set_bit(ETHTOOL_LINK_MODE_10baseT1S_Half_BIT, linkmodes); 314 __set_bit(ETHTOOL_LINK_MODE_10baseT1S_P2MP_Half_BIT, linkmodes); 315 } 316 317 if (caps & MAC_10FD) { 318 __set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, linkmodes); 319 __set_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT, linkmodes); 320 __set_bit(ETHTOOL_LINK_MODE_10baseT1S_Full_BIT, linkmodes); 321 } 322 323 if (caps & MAC_100HD) { 324 __set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, linkmodes); 325 __set_bit(ETHTOOL_LINK_MODE_100baseFX_Half_BIT, linkmodes); 326 } 327 328 if (caps & MAC_100FD) { 329 __set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, linkmodes); 330 __set_bit(ETHTOOL_LINK_MODE_100baseT1_Full_BIT, linkmodes); 331 __set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT, linkmodes); 332 } 333 334 if (caps & MAC_1000HD) 335 __set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, linkmodes); 336 337 if (caps & MAC_1000FD) { 338 __set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, linkmodes); 339 __set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, linkmodes); 340 __set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, linkmodes); 341 __set_bit(ETHTOOL_LINK_MODE_1000baseT1_Full_BIT, linkmodes); 342 } 343 344 if (caps & MAC_2500FD) { 345 __set_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, linkmodes); 346 __set_bit(ETHTOOL_LINK_MODE_2500baseX_Full_BIT, linkmodes); 347 } 348 349 if (caps & MAC_5000FD) 350 __set_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT, linkmodes); 351 352 if (caps & MAC_10000FD) { 353 __set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, linkmodes); 354 __set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, linkmodes); 355 __set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, linkmodes); 356 __set_bit(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT, linkmodes); 357 __set_bit(ETHTOOL_LINK_MODE_10000baseCR_Full_BIT, linkmodes); 358 __set_bit(ETHTOOL_LINK_MODE_10000baseSR_Full_BIT, linkmodes); 359 __set_bit(ETHTOOL_LINK_MODE_10000baseLR_Full_BIT, linkmodes); 360 __set_bit(ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT, linkmodes); 361 __set_bit(ETHTOOL_LINK_MODE_10000baseER_Full_BIT, linkmodes); 362 } 363 364 if (caps & MAC_25000FD) { 365 __set_bit(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT, linkmodes); 366 __set_bit(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT, linkmodes); 367 __set_bit(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT, linkmodes); 368 } 369 370 if (caps & MAC_40000FD) { 371 __set_bit(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT, linkmodes); 372 __set_bit(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT, linkmodes); 373 __set_bit(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT, linkmodes); 374 __set_bit(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT, linkmodes); 375 } 376 377 if (caps & MAC_50000FD) { 378 __set_bit(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT, linkmodes); 379 __set_bit(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT, linkmodes); 380 __set_bit(ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT, linkmodes); 381 __set_bit(ETHTOOL_LINK_MODE_50000baseKR_Full_BIT, linkmodes); 382 __set_bit(ETHTOOL_LINK_MODE_50000baseSR_Full_BIT, linkmodes); 383 __set_bit(ETHTOOL_LINK_MODE_50000baseCR_Full_BIT, linkmodes); 384 __set_bit(ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT, 385 linkmodes); 386 __set_bit(ETHTOOL_LINK_MODE_50000baseDR_Full_BIT, linkmodes); 387 } 388 389 if (caps & MAC_56000FD) { 390 __set_bit(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT, linkmodes); 391 __set_bit(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT, linkmodes); 392 __set_bit(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT, linkmodes); 393 __set_bit(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT, linkmodes); 394 } 395 396 if (caps & MAC_100000FD) { 397 __set_bit(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT, linkmodes); 398 __set_bit(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT, linkmodes); 399 __set_bit(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT, linkmodes); 400 __set_bit(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT, 401 linkmodes); 402 __set_bit(ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT, linkmodes); 403 __set_bit(ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT, linkmodes); 404 __set_bit(ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT, linkmodes); 405 __set_bit(ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT, 406 linkmodes); 407 __set_bit(ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT, linkmodes); 408 __set_bit(ETHTOOL_LINK_MODE_100000baseKR_Full_BIT, linkmodes); 409 __set_bit(ETHTOOL_LINK_MODE_100000baseSR_Full_BIT, linkmodes); 410 __set_bit(ETHTOOL_LINK_MODE_100000baseLR_ER_FR_Full_BIT, 411 linkmodes); 412 __set_bit(ETHTOOL_LINK_MODE_100000baseCR_Full_BIT, linkmodes); 413 __set_bit(ETHTOOL_LINK_MODE_100000baseDR_Full_BIT, linkmodes); 414 } 415 416 if (caps & MAC_200000FD) { 417 __set_bit(ETHTOOL_LINK_MODE_200000baseKR4_Full_BIT, linkmodes); 418 __set_bit(ETHTOOL_LINK_MODE_200000baseSR4_Full_BIT, linkmodes); 419 __set_bit(ETHTOOL_LINK_MODE_200000baseLR4_ER4_FR4_Full_BIT, 420 linkmodes); 421 __set_bit(ETHTOOL_LINK_MODE_200000baseDR4_Full_BIT, linkmodes); 422 __set_bit(ETHTOOL_LINK_MODE_200000baseCR4_Full_BIT, linkmodes); 423 __set_bit(ETHTOOL_LINK_MODE_200000baseKR2_Full_BIT, linkmodes); 424 __set_bit(ETHTOOL_LINK_MODE_200000baseSR2_Full_BIT, linkmodes); 425 __set_bit(ETHTOOL_LINK_MODE_200000baseLR2_ER2_FR2_Full_BIT, 426 linkmodes); 427 __set_bit(ETHTOOL_LINK_MODE_200000baseDR2_Full_BIT, linkmodes); 428 __set_bit(ETHTOOL_LINK_MODE_200000baseCR2_Full_BIT, linkmodes); 429 } 430 431 if (caps & MAC_400000FD) { 432 __set_bit(ETHTOOL_LINK_MODE_400000baseKR8_Full_BIT, linkmodes); 433 __set_bit(ETHTOOL_LINK_MODE_400000baseSR8_Full_BIT, linkmodes); 434 __set_bit(ETHTOOL_LINK_MODE_400000baseLR8_ER8_FR8_Full_BIT, 435 linkmodes); 436 __set_bit(ETHTOOL_LINK_MODE_400000baseDR8_Full_BIT, linkmodes); 437 __set_bit(ETHTOOL_LINK_MODE_400000baseCR8_Full_BIT, linkmodes); 438 __set_bit(ETHTOOL_LINK_MODE_400000baseKR4_Full_BIT, linkmodes); 439 __set_bit(ETHTOOL_LINK_MODE_400000baseSR4_Full_BIT, linkmodes); 440 __set_bit(ETHTOOL_LINK_MODE_400000baseLR4_ER4_FR4_Full_BIT, 441 linkmodes); 442 __set_bit(ETHTOOL_LINK_MODE_400000baseDR4_Full_BIT, linkmodes); 443 __set_bit(ETHTOOL_LINK_MODE_400000baseCR4_Full_BIT, linkmodes); 444 } 445 } 446 447 static struct { 448 unsigned long mask; 449 int speed; 450 unsigned int duplex; 451 } phylink_caps_params[] = { 452 { MAC_400000FD, SPEED_400000, DUPLEX_FULL }, 453 { MAC_200000FD, SPEED_200000, DUPLEX_FULL }, 454 { MAC_100000FD, SPEED_100000, DUPLEX_FULL }, 455 { MAC_56000FD, SPEED_56000, DUPLEX_FULL }, 456 { MAC_50000FD, SPEED_50000, DUPLEX_FULL }, 457 { MAC_40000FD, SPEED_40000, DUPLEX_FULL }, 458 { MAC_25000FD, SPEED_25000, DUPLEX_FULL }, 459 { MAC_20000FD, SPEED_20000, DUPLEX_FULL }, 460 { MAC_10000FD, SPEED_10000, DUPLEX_FULL }, 461 { MAC_5000FD, SPEED_5000, DUPLEX_FULL }, 462 { MAC_2500FD, SPEED_2500, DUPLEX_FULL }, 463 { MAC_1000FD, SPEED_1000, DUPLEX_FULL }, 464 { MAC_1000HD, SPEED_1000, DUPLEX_HALF }, 465 { MAC_100FD, SPEED_100, DUPLEX_FULL }, 466 { MAC_100HD, SPEED_100, DUPLEX_HALF }, 467 { MAC_10FD, SPEED_10, DUPLEX_FULL }, 468 { MAC_10HD, SPEED_10, DUPLEX_HALF }, 469 }; 470 471 /** 472 * phylink_limit_mac_speed - limit the phylink_config to a maximum speed 473 * @config: pointer to a &struct phylink_config 474 * @max_speed: maximum speed 475 * 476 * Mask off MAC capabilities for speeds higher than the @max_speed parameter. 477 * Any further motifications of config.mac_capabilities will override this. 478 */ 479 void phylink_limit_mac_speed(struct phylink_config *config, u32 max_speed) 480 { 481 int i; 482 483 for (i = 0; i < ARRAY_SIZE(phylink_caps_params) && 484 phylink_caps_params[i].speed > max_speed; i++) 485 config->mac_capabilities &= ~phylink_caps_params[i].mask; 486 } 487 EXPORT_SYMBOL_GPL(phylink_limit_mac_speed); 488 489 /** 490 * phylink_cap_from_speed_duplex - Get mac capability from speed/duplex 491 * @speed: the speed to search for 492 * @duplex: the duplex to search for 493 * 494 * Find the mac capability for a given speed and duplex. 495 * 496 * Return: A mask with the mac capability patching @speed and @duplex, or 0 if 497 * there were no matches. 498 */ 499 static unsigned long phylink_cap_from_speed_duplex(int speed, 500 unsigned int duplex) 501 { 502 int i; 503 504 for (i = 0; i < ARRAY_SIZE(phylink_caps_params); i++) { 505 if (speed == phylink_caps_params[i].speed && 506 duplex == phylink_caps_params[i].duplex) 507 return phylink_caps_params[i].mask; 508 } 509 510 return 0; 511 } 512 513 /** 514 * phylink_get_capabilities() - get capabilities for a given MAC 515 * @interface: phy interface mode defined by &typedef phy_interface_t 516 * @mac_capabilities: bitmask of MAC capabilities 517 * @rate_matching: type of rate matching being performed 518 * 519 * Get the MAC capabilities that are supported by the @interface mode and 520 * @mac_capabilities. 521 */ 522 static unsigned long phylink_get_capabilities(phy_interface_t interface, 523 unsigned long mac_capabilities, 524 int rate_matching) 525 { 526 int max_speed = phylink_interface_max_speed(interface); 527 unsigned long caps = MAC_SYM_PAUSE | MAC_ASYM_PAUSE; 528 unsigned long matched_caps = 0; 529 530 switch (interface) { 531 case PHY_INTERFACE_MODE_USXGMII: 532 caps |= MAC_10000FD | MAC_5000FD; 533 fallthrough; 534 535 case PHY_INTERFACE_MODE_10G_QXGMII: 536 caps |= MAC_2500FD; 537 fallthrough; 538 539 case PHY_INTERFACE_MODE_RGMII_TXID: 540 case PHY_INTERFACE_MODE_RGMII_RXID: 541 case PHY_INTERFACE_MODE_RGMII_ID: 542 case PHY_INTERFACE_MODE_RGMII: 543 case PHY_INTERFACE_MODE_PSGMII: 544 case PHY_INTERFACE_MODE_QSGMII: 545 case PHY_INTERFACE_MODE_QUSGMII: 546 case PHY_INTERFACE_MODE_SGMII: 547 case PHY_INTERFACE_MODE_GMII: 548 caps |= MAC_1000HD | MAC_1000FD; 549 fallthrough; 550 551 case PHY_INTERFACE_MODE_REVRMII: 552 case PHY_INTERFACE_MODE_RMII: 553 case PHY_INTERFACE_MODE_SMII: 554 case PHY_INTERFACE_MODE_REVMII: 555 case PHY_INTERFACE_MODE_MII: 556 caps |= MAC_10HD | MAC_10FD; 557 fallthrough; 558 559 case PHY_INTERFACE_MODE_100BASEX: 560 caps |= MAC_100HD | MAC_100FD; 561 break; 562 563 case PHY_INTERFACE_MODE_TBI: 564 case PHY_INTERFACE_MODE_MOCA: 565 case PHY_INTERFACE_MODE_RTBI: 566 case PHY_INTERFACE_MODE_1000BASEX: 567 caps |= MAC_1000HD; 568 fallthrough; 569 case PHY_INTERFACE_MODE_1000BASEKX: 570 case PHY_INTERFACE_MODE_TRGMII: 571 caps |= MAC_1000FD; 572 break; 573 574 case PHY_INTERFACE_MODE_2500BASEX: 575 caps |= MAC_2500FD; 576 break; 577 578 case PHY_INTERFACE_MODE_5GBASER: 579 caps |= MAC_5000FD; 580 break; 581 582 case PHY_INTERFACE_MODE_XGMII: 583 case PHY_INTERFACE_MODE_RXAUI: 584 case PHY_INTERFACE_MODE_XAUI: 585 case PHY_INTERFACE_MODE_10GBASER: 586 case PHY_INTERFACE_MODE_10GKR: 587 caps |= MAC_10000FD; 588 break; 589 590 case PHY_INTERFACE_MODE_25GBASER: 591 caps |= MAC_25000FD; 592 break; 593 594 case PHY_INTERFACE_MODE_XLGMII: 595 caps |= MAC_40000FD; 596 break; 597 598 case PHY_INTERFACE_MODE_INTERNAL: 599 caps |= ~0; 600 break; 601 602 case PHY_INTERFACE_MODE_NA: 603 case PHY_INTERFACE_MODE_MAX: 604 break; 605 } 606 607 switch (rate_matching) { 608 case RATE_MATCH_OPEN_LOOP: 609 /* TODO */ 610 fallthrough; 611 case RATE_MATCH_NONE: 612 matched_caps = 0; 613 break; 614 case RATE_MATCH_PAUSE: { 615 /* The MAC must support asymmetric pause towards the local 616 * device for this. We could allow just symmetric pause, but 617 * then we might have to renegotiate if the link partner 618 * doesn't support pause. This is because there's no way to 619 * accept pause frames without transmitting them if we only 620 * support symmetric pause. 621 */ 622 if (!(mac_capabilities & MAC_SYM_PAUSE) || 623 !(mac_capabilities & MAC_ASYM_PAUSE)) 624 break; 625 626 /* We can't adapt if the MAC doesn't support the interface's 627 * max speed at full duplex. 628 */ 629 if (mac_capabilities & 630 phylink_cap_from_speed_duplex(max_speed, DUPLEX_FULL)) 631 matched_caps = GENMASK(__fls(caps), __fls(MAC_10HD)); 632 break; 633 } 634 case RATE_MATCH_CRS: 635 /* The MAC must support half duplex at the interface's max 636 * speed. 637 */ 638 if (mac_capabilities & 639 phylink_cap_from_speed_duplex(max_speed, DUPLEX_HALF)) { 640 matched_caps = GENMASK(__fls(caps), __fls(MAC_10HD)); 641 matched_caps &= mac_capabilities; 642 } 643 break; 644 } 645 646 return (caps & mac_capabilities) | matched_caps; 647 } 648 649 /** 650 * phylink_validate_mask_caps() - Restrict link modes based on caps 651 * @supported: ethtool bitmask for supported link modes. 652 * @state: pointer to a &struct phylink_link_state. 653 * @mac_capabilities: bitmask of MAC capabilities 654 * 655 * Calculate the supported link modes based on @mac_capabilities, and restrict 656 * @supported and @state based on that. Use this function if your capabiliies 657 * aren't constant, such as if they vary depending on the interface. 658 */ 659 static void phylink_validate_mask_caps(unsigned long *supported, 660 struct phylink_link_state *state, 661 unsigned long mac_capabilities) 662 { 663 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; 664 unsigned long caps; 665 666 phylink_set_port_modes(mask); 667 phylink_set(mask, Autoneg); 668 caps = phylink_get_capabilities(state->interface, mac_capabilities, 669 state->rate_matching); 670 phylink_caps_to_linkmodes(mask, caps); 671 672 linkmode_and(supported, supported, mask); 673 linkmode_and(state->advertising, state->advertising, mask); 674 } 675 676 static int phylink_validate_mac_and_pcs(struct phylink *pl, 677 unsigned long *supported, 678 struct phylink_link_state *state) 679 { 680 struct phylink_pcs *pcs = NULL; 681 unsigned long capabilities; 682 int ret; 683 684 /* Get the PCS for this interface mode */ 685 if (pl->mac_ops->mac_select_pcs) { 686 pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface); 687 if (IS_ERR(pcs)) 688 return PTR_ERR(pcs); 689 } 690 691 if (pcs) { 692 /* The PCS, if present, must be setup before phylink_create() 693 * has been called. If the ops is not initialised, print an 694 * error and backtrace rather than oopsing the kernel. 695 */ 696 if (!pcs->ops) { 697 phylink_err(pl, "interface %s: uninitialised PCS\n", 698 phy_modes(state->interface)); 699 dump_stack(); 700 return -EINVAL; 701 } 702 703 /* Ensure that this PCS supports the interface which the MAC 704 * returned it for. It is an error for the MAC to return a PCS 705 * that does not support the interface mode. 706 */ 707 if (!phy_interface_empty(pcs->supported_interfaces) && 708 !test_bit(state->interface, pcs->supported_interfaces)) { 709 phylink_err(pl, "MAC returned PCS which does not support %s\n", 710 phy_modes(state->interface)); 711 return -EINVAL; 712 } 713 714 /* Validate the link parameters with the PCS */ 715 if (pcs->ops->pcs_validate) { 716 ret = pcs->ops->pcs_validate(pcs, supported, state); 717 if (ret < 0 || phylink_is_empty_linkmode(supported)) 718 return -EINVAL; 719 720 /* Ensure the advertising mask is a subset of the 721 * supported mask. 722 */ 723 linkmode_and(state->advertising, state->advertising, 724 supported); 725 } 726 } 727 728 /* Then validate the link parameters with the MAC */ 729 if (pl->mac_ops->mac_get_caps) 730 capabilities = pl->mac_ops->mac_get_caps(pl->config, 731 state->interface); 732 else 733 capabilities = pl->config->mac_capabilities; 734 735 phylink_validate_mask_caps(supported, state, capabilities); 736 737 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; 738 } 739 740 static void phylink_validate_one(struct phylink *pl, struct phy_device *phy, 741 const unsigned long *supported, 742 const struct phylink_link_state *state, 743 phy_interface_t interface, 744 unsigned long *accum_supported, 745 unsigned long *accum_advertising) 746 { 747 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp_supported); 748 struct phylink_link_state tmp_state; 749 750 linkmode_copy(tmp_supported, supported); 751 752 tmp_state = *state; 753 tmp_state.interface = interface; 754 755 if (phy) 756 tmp_state.rate_matching = phy_get_rate_matching(phy, interface); 757 758 if (!phylink_validate_mac_and_pcs(pl, tmp_supported, &tmp_state)) { 759 phylink_dbg(pl, " interface %u (%s) rate match %s supports %*pbl\n", 760 interface, phy_modes(interface), 761 phy_rate_matching_to_str(tmp_state.rate_matching), 762 __ETHTOOL_LINK_MODE_MASK_NBITS, tmp_supported); 763 764 linkmode_or(accum_supported, accum_supported, tmp_supported); 765 linkmode_or(accum_advertising, accum_advertising, 766 tmp_state.advertising); 767 } 768 } 769 770 static int phylink_validate_mask(struct phylink *pl, struct phy_device *phy, 771 unsigned long *supported, 772 struct phylink_link_state *state, 773 const unsigned long *interfaces) 774 { 775 __ETHTOOL_DECLARE_LINK_MODE_MASK(all_adv) = { 0, }; 776 __ETHTOOL_DECLARE_LINK_MODE_MASK(all_s) = { 0, }; 777 int interface; 778 779 for_each_set_bit(interface, interfaces, PHY_INTERFACE_MODE_MAX) 780 phylink_validate_one(pl, phy, supported, state, interface, 781 all_s, all_adv); 782 783 linkmode_copy(supported, all_s); 784 linkmode_copy(state->advertising, all_adv); 785 786 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; 787 } 788 789 static int phylink_validate(struct phylink *pl, unsigned long *supported, 790 struct phylink_link_state *state) 791 { 792 const unsigned long *interfaces = pl->config->supported_interfaces; 793 794 if (state->interface == PHY_INTERFACE_MODE_NA) 795 return phylink_validate_mask(pl, NULL, supported, state, 796 interfaces); 797 798 if (!test_bit(state->interface, interfaces)) 799 return -EINVAL; 800 801 return phylink_validate_mac_and_pcs(pl, supported, state); 802 } 803 804 static int phylink_parse_fixedlink(struct phylink *pl, 805 const struct fwnode_handle *fwnode) 806 { 807 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; 808 struct fwnode_handle *fixed_node; 809 const struct phy_setting *s; 810 struct gpio_desc *desc; 811 u32 speed; 812 int ret; 813 814 fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link"); 815 if (fixed_node) { 816 ret = fwnode_property_read_u32(fixed_node, "speed", &speed); 817 818 pl->link_config.speed = speed; 819 pl->link_config.duplex = DUPLEX_HALF; 820 821 if (fwnode_property_read_bool(fixed_node, "full-duplex")) 822 pl->link_config.duplex = DUPLEX_FULL; 823 824 /* We treat the "pause" and "asym-pause" terminology as 825 * defining the link partner's ability. 826 */ 827 if (fwnode_property_read_bool(fixed_node, "pause")) 828 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 829 pl->link_config.lp_advertising); 830 if (fwnode_property_read_bool(fixed_node, "asym-pause")) 831 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 832 pl->link_config.lp_advertising); 833 834 if (ret == 0) { 835 desc = fwnode_gpiod_get_index(fixed_node, "link", 0, 836 GPIOD_IN, "?"); 837 838 if (!IS_ERR(desc)) 839 pl->link_gpio = desc; 840 else if (desc == ERR_PTR(-EPROBE_DEFER)) 841 ret = -EPROBE_DEFER; 842 } 843 fwnode_handle_put(fixed_node); 844 845 if (ret) 846 return ret; 847 } else { 848 u32 prop[5]; 849 850 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 851 NULL, 0); 852 if (ret != ARRAY_SIZE(prop)) { 853 phylink_err(pl, "broken fixed-link?\n"); 854 return -EINVAL; 855 } 856 857 ret = fwnode_property_read_u32_array(fwnode, "fixed-link", 858 prop, ARRAY_SIZE(prop)); 859 if (!ret) { 860 pl->link_config.duplex = prop[1] ? 861 DUPLEX_FULL : DUPLEX_HALF; 862 pl->link_config.speed = prop[2]; 863 if (prop[3]) 864 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 865 pl->link_config.lp_advertising); 866 if (prop[4]) 867 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 868 pl->link_config.lp_advertising); 869 } 870 } 871 872 if (pl->link_config.speed > SPEED_1000 && 873 pl->link_config.duplex != DUPLEX_FULL) 874 phylink_warn(pl, "fixed link specifies half duplex for %dMbps link?\n", 875 pl->link_config.speed); 876 877 linkmode_fill(pl->supported); 878 linkmode_copy(pl->link_config.advertising, pl->supported); 879 phylink_validate(pl, pl->supported, &pl->link_config); 880 881 s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex, 882 pl->supported, true); 883 884 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, mask); 885 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, mask); 886 linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, mask); 887 linkmode_and(pl->supported, pl->supported, mask); 888 889 phylink_set(pl->supported, MII); 890 891 if (s) { 892 __set_bit(s->bit, pl->supported); 893 __set_bit(s->bit, pl->link_config.lp_advertising); 894 } else { 895 phylink_warn(pl, "fixed link %s duplex %dMbps not recognised\n", 896 pl->link_config.duplex == DUPLEX_FULL ? "full" : "half", 897 pl->link_config.speed); 898 } 899 900 linkmode_and(pl->link_config.advertising, pl->link_config.advertising, 901 pl->supported); 902 903 pl->link_config.link = 1; 904 pl->link_config.an_complete = 1; 905 906 return 0; 907 } 908 909 static int phylink_parse_mode(struct phylink *pl, 910 const struct fwnode_handle *fwnode) 911 { 912 struct fwnode_handle *dn; 913 const char *managed; 914 unsigned long caps; 915 916 if (pl->config->default_an_inband) 917 pl->cfg_link_an_mode = MLO_AN_INBAND; 918 919 dn = fwnode_get_named_child_node(fwnode, "fixed-link"); 920 if (dn || fwnode_property_present(fwnode, "fixed-link")) 921 pl->cfg_link_an_mode = MLO_AN_FIXED; 922 fwnode_handle_put(dn); 923 924 if ((fwnode_property_read_string(fwnode, "managed", &managed) == 0 && 925 strcmp(managed, "in-band-status") == 0)) { 926 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 927 phylink_err(pl, 928 "can't use both fixed-link and in-band-status\n"); 929 return -EINVAL; 930 } 931 932 pl->cfg_link_an_mode = MLO_AN_INBAND; 933 } 934 935 if (pl->cfg_link_an_mode == MLO_AN_INBAND) { 936 linkmode_zero(pl->supported); 937 phylink_set(pl->supported, MII); 938 phylink_set(pl->supported, Autoneg); 939 phylink_set(pl->supported, Asym_Pause); 940 phylink_set(pl->supported, Pause); 941 942 switch (pl->link_config.interface) { 943 case PHY_INTERFACE_MODE_SGMII: 944 case PHY_INTERFACE_MODE_PSGMII: 945 case PHY_INTERFACE_MODE_QSGMII: 946 case PHY_INTERFACE_MODE_QUSGMII: 947 case PHY_INTERFACE_MODE_RGMII: 948 case PHY_INTERFACE_MODE_RGMII_ID: 949 case PHY_INTERFACE_MODE_RGMII_RXID: 950 case PHY_INTERFACE_MODE_RGMII_TXID: 951 case PHY_INTERFACE_MODE_RTBI: 952 case PHY_INTERFACE_MODE_1000BASEX: 953 case PHY_INTERFACE_MODE_2500BASEX: 954 case PHY_INTERFACE_MODE_5GBASER: 955 case PHY_INTERFACE_MODE_25GBASER: 956 case PHY_INTERFACE_MODE_USXGMII: 957 case PHY_INTERFACE_MODE_10G_QXGMII: 958 case PHY_INTERFACE_MODE_10GKR: 959 case PHY_INTERFACE_MODE_10GBASER: 960 case PHY_INTERFACE_MODE_XLGMII: 961 caps = ~(MAC_SYM_PAUSE | MAC_ASYM_PAUSE); 962 caps = phylink_get_capabilities(pl->link_config.interface, caps, 963 RATE_MATCH_NONE); 964 phylink_caps_to_linkmodes(pl->supported, caps); 965 break; 966 967 default: 968 phylink_err(pl, 969 "incorrect link mode %s for in-band status\n", 970 phy_modes(pl->link_config.interface)); 971 return -EINVAL; 972 } 973 974 linkmode_copy(pl->link_config.advertising, pl->supported); 975 976 if (phylink_validate(pl, pl->supported, &pl->link_config)) { 977 phylink_err(pl, 978 "failed to validate link configuration for in-band status\n"); 979 return -EINVAL; 980 } 981 } 982 983 return 0; 984 } 985 986 static void phylink_apply_manual_flow(struct phylink *pl, 987 struct phylink_link_state *state) 988 { 989 /* If autoneg is disabled, pause AN is also disabled */ 990 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 991 state->advertising)) 992 state->pause &= ~MLO_PAUSE_AN; 993 994 /* Manual configuration of pause modes */ 995 if (!(pl->link_config.pause & MLO_PAUSE_AN)) 996 state->pause = pl->link_config.pause; 997 } 998 999 static void phylink_resolve_an_pause(struct phylink_link_state *state) 1000 { 1001 bool tx_pause, rx_pause; 1002 1003 if (state->duplex == DUPLEX_FULL) { 1004 linkmode_resolve_pause(state->advertising, 1005 state->lp_advertising, 1006 &tx_pause, &rx_pause); 1007 if (tx_pause) 1008 state->pause |= MLO_PAUSE_TX; 1009 if (rx_pause) 1010 state->pause |= MLO_PAUSE_RX; 1011 } 1012 } 1013 1014 static unsigned int phylink_pcs_inband_caps(struct phylink_pcs *pcs, 1015 phy_interface_t interface) 1016 { 1017 if (pcs && pcs->ops->pcs_inband_caps) 1018 return pcs->ops->pcs_inband_caps(pcs, interface); 1019 1020 return 0; 1021 } 1022 1023 static void phylink_pcs_pre_config(struct phylink_pcs *pcs, 1024 phy_interface_t interface) 1025 { 1026 if (pcs && pcs->ops->pcs_pre_config) 1027 pcs->ops->pcs_pre_config(pcs, interface); 1028 } 1029 1030 static int phylink_pcs_post_config(struct phylink_pcs *pcs, 1031 phy_interface_t interface) 1032 { 1033 int err = 0; 1034 1035 if (pcs && pcs->ops->pcs_post_config) 1036 err = pcs->ops->pcs_post_config(pcs, interface); 1037 1038 return err; 1039 } 1040 1041 static void phylink_pcs_disable(struct phylink_pcs *pcs) 1042 { 1043 if (pcs && pcs->ops->pcs_disable) 1044 pcs->ops->pcs_disable(pcs); 1045 } 1046 1047 static int phylink_pcs_enable(struct phylink_pcs *pcs) 1048 { 1049 int err = 0; 1050 1051 if (pcs && pcs->ops->pcs_enable) 1052 err = pcs->ops->pcs_enable(pcs); 1053 1054 return err; 1055 } 1056 1057 static int phylink_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode, 1058 const struct phylink_link_state *state, 1059 bool permit_pause_to_mac) 1060 { 1061 if (!pcs) 1062 return 0; 1063 1064 return pcs->ops->pcs_config(pcs, neg_mode, state->interface, 1065 state->advertising, permit_pause_to_mac); 1066 } 1067 1068 static void phylink_pcs_link_up(struct phylink_pcs *pcs, unsigned int neg_mode, 1069 phy_interface_t interface, int speed, 1070 int duplex) 1071 { 1072 if (pcs && pcs->ops->pcs_link_up) 1073 pcs->ops->pcs_link_up(pcs, neg_mode, interface, speed, duplex); 1074 } 1075 1076 /* Query inband for a specific interface mode, asking the MAC for the 1077 * PCS which will be used to handle the interface mode. 1078 */ 1079 static unsigned int phylink_inband_caps(struct phylink *pl, 1080 phy_interface_t interface) 1081 { 1082 struct phylink_pcs *pcs; 1083 1084 if (!pl->mac_ops->mac_select_pcs) 1085 return 0; 1086 1087 pcs = pl->mac_ops->mac_select_pcs(pl->config, interface); 1088 if (!pcs) 1089 return 0; 1090 1091 return phylink_pcs_inband_caps(pcs, interface); 1092 } 1093 1094 static void phylink_pcs_poll_stop(struct phylink *pl) 1095 { 1096 if (pl->cfg_link_an_mode == MLO_AN_INBAND) 1097 del_timer(&pl->link_poll); 1098 } 1099 1100 static void phylink_pcs_poll_start(struct phylink *pl) 1101 { 1102 if (pl->pcs && pl->pcs->poll && pl->cfg_link_an_mode == MLO_AN_INBAND) 1103 mod_timer(&pl->link_poll, jiffies + HZ); 1104 } 1105 1106 int phylink_pcs_pre_init(struct phylink *pl, struct phylink_pcs *pcs) 1107 { 1108 int ret = 0; 1109 1110 /* Signal to PCS driver that MAC requires RX clock for init */ 1111 if (pl->config->mac_requires_rxc) 1112 pcs->rxc_always_on = true; 1113 1114 if (pcs->ops->pcs_pre_init) 1115 ret = pcs->ops->pcs_pre_init(pcs); 1116 1117 return ret; 1118 } 1119 EXPORT_SYMBOL_GPL(phylink_pcs_pre_init); 1120 1121 static void phylink_mac_config(struct phylink *pl, 1122 const struct phylink_link_state *state) 1123 { 1124 struct phylink_link_state st = *state; 1125 1126 /* Stop drivers incorrectly using these */ 1127 linkmode_zero(st.lp_advertising); 1128 st.speed = SPEED_UNKNOWN; 1129 st.duplex = DUPLEX_UNKNOWN; 1130 st.an_complete = false; 1131 st.link = false; 1132 1133 phylink_dbg(pl, 1134 "%s: mode=%s/%s/%s adv=%*pb pause=%02x\n", 1135 __func__, phylink_an_mode_str(pl->act_link_an_mode), 1136 phy_modes(st.interface), 1137 phy_rate_matching_to_str(st.rate_matching), 1138 __ETHTOOL_LINK_MODE_MASK_NBITS, st.advertising, 1139 st.pause); 1140 1141 pl->mac_ops->mac_config(pl->config, pl->act_link_an_mode, &st); 1142 } 1143 1144 static void phylink_pcs_an_restart(struct phylink *pl) 1145 { 1146 if (pl->pcs && linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 1147 pl->link_config.advertising) && 1148 phy_interface_mode_is_8023z(pl->link_config.interface) && 1149 phylink_autoneg_inband(pl->act_link_an_mode)) 1150 pl->pcs->ops->pcs_an_restart(pl->pcs); 1151 } 1152 1153 /** 1154 * phylink_pcs_neg_mode() - helper to determine PCS inband mode 1155 * @pl: a pointer to a &struct phylink returned from phylink_create() 1156 * @pcs: a pointer to &struct phylink_pcs 1157 * @interface: interface mode to be used 1158 * @advertising: adertisement ethtool link mode mask 1159 * 1160 * Determines the negotiation mode to be used by the PCS, and returns 1161 * one of: 1162 * 1163 * - %PHYLINK_PCS_NEG_NONE: interface mode does not support inband 1164 * - %PHYLINK_PCS_NEG_OUTBAND: an out of band mode (e.g. reading the PHY) 1165 * will be used. 1166 * - %PHYLINK_PCS_NEG_INBAND_DISABLED: inband mode selected but autoneg 1167 * disabled 1168 * - %PHYLINK_PCS_NEG_INBAND_ENABLED: inband mode selected and autoneg enabled 1169 * 1170 * Note: this is for cases where the PCS itself is involved in negotiation 1171 * (e.g. Clause 37, SGMII and similar) not Clause 73. 1172 */ 1173 static void phylink_pcs_neg_mode(struct phylink *pl, struct phylink_pcs *pcs, 1174 phy_interface_t interface, 1175 const unsigned long *advertising) 1176 { 1177 unsigned int pcs_ib_caps = 0; 1178 unsigned int phy_ib_caps = 0; 1179 unsigned int neg_mode, mode; 1180 enum { 1181 INBAND_CISCO_SGMII, 1182 INBAND_BASEX, 1183 } type; 1184 1185 mode = pl->req_link_an_mode; 1186 1187 pl->phy_ib_mode = 0; 1188 1189 switch (interface) { 1190 case PHY_INTERFACE_MODE_SGMII: 1191 case PHY_INTERFACE_MODE_QSGMII: 1192 case PHY_INTERFACE_MODE_QUSGMII: 1193 case PHY_INTERFACE_MODE_USXGMII: 1194 case PHY_INTERFACE_MODE_10G_QXGMII: 1195 /* These protocols are designed for use with a PHY which 1196 * communicates its negotiation result back to the MAC via 1197 * inband communication. Note: there exist PHYs that run 1198 * with SGMII but do not send the inband data. 1199 */ 1200 type = INBAND_CISCO_SGMII; 1201 break; 1202 1203 case PHY_INTERFACE_MODE_1000BASEX: 1204 case PHY_INTERFACE_MODE_2500BASEX: 1205 /* 1000base-X is designed for use media-side for Fibre 1206 * connections, and thus the Autoneg bit needs to be 1207 * taken into account. We also do this for 2500base-X 1208 * as well, but drivers may not support this, so may 1209 * need to override this. 1210 */ 1211 type = INBAND_BASEX; 1212 break; 1213 1214 default: 1215 pl->pcs_neg_mode = PHYLINK_PCS_NEG_NONE; 1216 pl->act_link_an_mode = mode; 1217 return; 1218 } 1219 1220 if (pcs) 1221 pcs_ib_caps = phylink_pcs_inband_caps(pcs, interface); 1222 1223 if (pl->phydev) 1224 phy_ib_caps = phy_inband_caps(pl->phydev, interface); 1225 1226 phylink_dbg(pl, "interface %s inband modes: pcs=%02x phy=%02x\n", 1227 phy_modes(interface), pcs_ib_caps, phy_ib_caps); 1228 1229 if (!phylink_autoneg_inband(mode)) { 1230 bool pcs_ib_only = false; 1231 bool phy_ib_only = false; 1232 1233 if (pcs_ib_caps && pcs_ib_caps != LINK_INBAND_DISABLE) { 1234 /* PCS supports reporting in-band capabilities, and 1235 * supports more than disable mode. 1236 */ 1237 if (pcs_ib_caps & LINK_INBAND_DISABLE) 1238 neg_mode = PHYLINK_PCS_NEG_OUTBAND; 1239 else if (pcs_ib_caps & LINK_INBAND_ENABLE) 1240 pcs_ib_only = true; 1241 } 1242 1243 if (phy_ib_caps && phy_ib_caps != LINK_INBAND_DISABLE) { 1244 /* PHY supports in-band capabilities, and supports 1245 * more than disable mode. 1246 */ 1247 if (phy_ib_caps & LINK_INBAND_DISABLE) 1248 pl->phy_ib_mode = LINK_INBAND_DISABLE; 1249 else if (phy_ib_caps & LINK_INBAND_BYPASS) 1250 pl->phy_ib_mode = LINK_INBAND_BYPASS; 1251 else if (phy_ib_caps & LINK_INBAND_ENABLE) 1252 phy_ib_only = true; 1253 } 1254 1255 /* If either the PCS or PHY requires inband to be enabled, 1256 * this is an invalid configuration. Provide a diagnostic 1257 * message for this case, but don't try to force the issue. 1258 */ 1259 if (pcs_ib_only || phy_ib_only) 1260 phylink_warn(pl, 1261 "firmware wants %s mode, but %s%s%s requires inband\n", 1262 phylink_an_mode_str(mode), 1263 pcs_ib_only ? "PCS" : "", 1264 pcs_ib_only && phy_ib_only ? " and " : "", 1265 phy_ib_only ? "PHY" : ""); 1266 1267 neg_mode = PHYLINK_PCS_NEG_OUTBAND; 1268 } else if (type == INBAND_CISCO_SGMII || pl->phydev) { 1269 /* For SGMII modes which are designed to be used with PHYs, or 1270 * Base-X with a PHY, we try to use in-band mode where-ever 1271 * possible. However, there are some PHYs e.g. BCM84881 which 1272 * do not support in-band. 1273 */ 1274 const unsigned int inband_ok = LINK_INBAND_ENABLE | 1275 LINK_INBAND_BYPASS; 1276 const unsigned int outband_ok = LINK_INBAND_DISABLE | 1277 LINK_INBAND_BYPASS; 1278 /* PCS PHY 1279 * D E D E 1280 * 0 0 0 0 no information inband enabled 1281 * 1 0 0 0 pcs doesn't support outband 1282 * 0 1 0 0 pcs required inband enabled 1283 * 1 1 0 0 pcs optional inband enabled 1284 * 0 0 1 0 phy doesn't support outband 1285 * 1 0 1 0 pcs+phy doesn't support outband 1286 * 0 1 1 0 pcs required, phy doesn't support, invalid 1287 * 1 1 1 0 pcs optional, phy doesn't support, outband 1288 * 0 0 0 1 phy required inband enabled 1289 * 1 0 0 1 pcs doesn't support, phy required, invalid 1290 * 0 1 0 1 pcs+phy required inband enabled 1291 * 1 1 0 1 pcs optional, phy required inband enabled 1292 * 0 0 1 1 phy optional inband enabled 1293 * 1 0 1 1 pcs doesn't support, phy optional, outband 1294 * 0 1 1 1 pcs required, phy optional inband enabled 1295 * 1 1 1 1 pcs+phy optional inband enabled 1296 */ 1297 if ((!pcs_ib_caps || pcs_ib_caps & inband_ok) && 1298 (!phy_ib_caps || phy_ib_caps & inband_ok)) { 1299 /* In-band supported or unknown at both ends. Enable 1300 * in-band mode with or without bypass at the PHY. 1301 */ 1302 if (phy_ib_caps & LINK_INBAND_ENABLE) 1303 pl->phy_ib_mode = LINK_INBAND_ENABLE; 1304 else if (phy_ib_caps & LINK_INBAND_BYPASS) 1305 pl->phy_ib_mode = LINK_INBAND_BYPASS; 1306 1307 neg_mode = PHYLINK_PCS_NEG_INBAND_ENABLED; 1308 } else if ((!pcs_ib_caps || pcs_ib_caps & outband_ok) && 1309 (!phy_ib_caps || phy_ib_caps & outband_ok)) { 1310 /* Either in-band not supported at at least one end. 1311 * In-band bypass at the other end is possible. 1312 */ 1313 if (phy_ib_caps & LINK_INBAND_DISABLE) 1314 pl->phy_ib_mode = LINK_INBAND_DISABLE; 1315 else if (phy_ib_caps & LINK_INBAND_BYPASS) 1316 pl->phy_ib_mode = LINK_INBAND_BYPASS; 1317 1318 neg_mode = PHYLINK_PCS_NEG_OUTBAND; 1319 if (pl->phydev) 1320 mode = MLO_AN_PHY; 1321 } else { 1322 /* invalid */ 1323 phylink_warn(pl, "%s: incompatible in-band capabilities, trying in-band", 1324 phy_modes(interface)); 1325 neg_mode = PHYLINK_PCS_NEG_INBAND_ENABLED; 1326 } 1327 } else { 1328 /* For Base-X without a PHY */ 1329 if (pcs_ib_caps == LINK_INBAND_DISABLE) 1330 /* If the PCS doesn't support inband, then inband must 1331 * be disabled. 1332 */ 1333 neg_mode = PHYLINK_PCS_NEG_INBAND_DISABLED; 1334 else if (pcs_ib_caps == LINK_INBAND_ENABLE) 1335 /* If the PCS requires inband, then inband must always 1336 * be enabled. 1337 */ 1338 neg_mode = PHYLINK_PCS_NEG_INBAND_ENABLED; 1339 else if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 1340 advertising)) 1341 neg_mode = PHYLINK_PCS_NEG_INBAND_ENABLED; 1342 else 1343 neg_mode = PHYLINK_PCS_NEG_INBAND_DISABLED; 1344 } 1345 1346 pl->pcs_neg_mode = neg_mode; 1347 pl->act_link_an_mode = mode; 1348 } 1349 1350 static void phylink_major_config(struct phylink *pl, bool restart, 1351 const struct phylink_link_state *state) 1352 { 1353 struct phylink_pcs *pcs = NULL; 1354 bool pcs_changed = false; 1355 unsigned int rate_kbd; 1356 unsigned int neg_mode; 1357 int err; 1358 1359 phylink_dbg(pl, "major config, requested %s/%s\n", 1360 phylink_an_mode_str(pl->req_link_an_mode), 1361 phy_modes(state->interface)); 1362 1363 if (pl->mac_ops->mac_select_pcs) { 1364 pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface); 1365 if (IS_ERR(pcs)) { 1366 phylink_err(pl, 1367 "mac_select_pcs unexpectedly failed: %pe\n", 1368 pcs); 1369 return; 1370 } 1371 1372 pcs_changed = pl->pcs != pcs; 1373 } 1374 1375 phylink_pcs_neg_mode(pl, pcs, state->interface, state->advertising); 1376 1377 phylink_dbg(pl, "major config, active %s/%s/%s\n", 1378 phylink_an_mode_str(pl->act_link_an_mode), 1379 phylink_pcs_mode_str(pl->pcs_neg_mode), 1380 phy_modes(state->interface)); 1381 1382 phylink_pcs_poll_stop(pl); 1383 1384 if (pl->mac_ops->mac_prepare) { 1385 err = pl->mac_ops->mac_prepare(pl->config, pl->act_link_an_mode, 1386 state->interface); 1387 if (err < 0) { 1388 phylink_err(pl, "mac_prepare failed: %pe\n", 1389 ERR_PTR(err)); 1390 return; 1391 } 1392 } 1393 1394 /* If we have a new PCS, switch to the new PCS after preparing the MAC 1395 * for the change. 1396 */ 1397 if (pcs_changed) { 1398 phylink_pcs_disable(pl->pcs); 1399 1400 if (pl->pcs) 1401 pl->pcs->phylink = NULL; 1402 1403 pcs->phylink = pl; 1404 1405 pl->pcs = pcs; 1406 } 1407 1408 if (pl->pcs) 1409 phylink_pcs_pre_config(pl->pcs, state->interface); 1410 1411 phylink_mac_config(pl, state); 1412 1413 if (pl->pcs) 1414 phylink_pcs_post_config(pl->pcs, state->interface); 1415 1416 if (pl->pcs_state == PCS_STATE_STARTING || pcs_changed) 1417 phylink_pcs_enable(pl->pcs); 1418 1419 neg_mode = pl->act_link_an_mode; 1420 if (pl->pcs && pl->pcs->neg_mode) 1421 neg_mode = pl->pcs_neg_mode; 1422 1423 err = phylink_pcs_config(pl->pcs, neg_mode, state, 1424 !!(pl->link_config.pause & MLO_PAUSE_AN)); 1425 if (err < 0) 1426 phylink_err(pl, "pcs_config failed: %pe\n", 1427 ERR_PTR(err)); 1428 else if (err > 0) 1429 restart = true; 1430 1431 if (restart) 1432 phylink_pcs_an_restart(pl); 1433 1434 if (pl->mac_ops->mac_finish) { 1435 err = pl->mac_ops->mac_finish(pl->config, pl->act_link_an_mode, 1436 state->interface); 1437 if (err < 0) 1438 phylink_err(pl, "mac_finish failed: %pe\n", 1439 ERR_PTR(err)); 1440 } 1441 1442 if (pl->phydev && pl->phy_ib_mode) { 1443 err = phy_config_inband(pl->phydev, pl->phy_ib_mode); 1444 if (err < 0) 1445 phylink_err(pl, "phy_config_inband: %pe\n", 1446 ERR_PTR(err)); 1447 } 1448 1449 if (pl->sfp_bus) { 1450 rate_kbd = phylink_interface_signal_rate(state->interface); 1451 if (rate_kbd) 1452 sfp_upstream_set_signal_rate(pl->sfp_bus, rate_kbd); 1453 } 1454 1455 phylink_pcs_poll_start(pl); 1456 } 1457 1458 /* 1459 * Reconfigure for a change of inband advertisement. 1460 * If we have a separate PCS, we only need to call its pcs_config() method, 1461 * and then restart AN if it indicates something changed. Otherwise, we do 1462 * the full MAC reconfiguration. 1463 */ 1464 static int phylink_change_inband_advert(struct phylink *pl) 1465 { 1466 unsigned int neg_mode; 1467 int ret; 1468 1469 if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) 1470 return 0; 1471 1472 phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__, 1473 phylink_an_mode_str(pl->req_link_an_mode), 1474 phy_modes(pl->link_config.interface), 1475 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->link_config.advertising, 1476 pl->link_config.pause); 1477 1478 /* Recompute the PCS neg mode */ 1479 phylink_pcs_neg_mode(pl, pl->pcs, pl->link_config.interface, 1480 pl->link_config.advertising); 1481 1482 neg_mode = pl->act_link_an_mode; 1483 if (pl->pcs->neg_mode) 1484 neg_mode = pl->pcs_neg_mode; 1485 1486 /* Modern PCS-based method; update the advert at the PCS, and 1487 * restart negotiation if the pcs_config() helper indicates that 1488 * the programmed advertisement has changed. 1489 */ 1490 ret = phylink_pcs_config(pl->pcs, neg_mode, &pl->link_config, 1491 !!(pl->link_config.pause & MLO_PAUSE_AN)); 1492 if (ret < 0) 1493 return ret; 1494 1495 if (ret > 0) 1496 phylink_pcs_an_restart(pl); 1497 1498 return 0; 1499 } 1500 1501 static void phylink_mac_pcs_get_state(struct phylink *pl, 1502 struct phylink_link_state *state) 1503 { 1504 struct phylink_pcs *pcs; 1505 bool autoneg; 1506 1507 linkmode_copy(state->advertising, pl->link_config.advertising); 1508 linkmode_zero(state->lp_advertising); 1509 state->interface = pl->link_config.interface; 1510 state->rate_matching = pl->link_config.rate_matching; 1511 state->an_complete = 0; 1512 state->link = 1; 1513 1514 pcs = pl->pcs; 1515 if (!pcs || pcs->neg_mode) 1516 autoneg = pl->pcs_neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED; 1517 else 1518 autoneg = linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 1519 state->advertising); 1520 1521 if (autoneg) { 1522 state->speed = SPEED_UNKNOWN; 1523 state->duplex = DUPLEX_UNKNOWN; 1524 state->pause = MLO_PAUSE_NONE; 1525 } else { 1526 state->speed = pl->link_config.speed; 1527 state->duplex = pl->link_config.duplex; 1528 state->pause = pl->link_config.pause; 1529 } 1530 1531 if (pcs) 1532 pcs->ops->pcs_get_state(pcs, pl->pcs_neg_mode, state); 1533 else 1534 state->link = 0; 1535 } 1536 1537 /* The fixed state is... fixed except for the link state, 1538 * which may be determined by a GPIO or a callback. 1539 */ 1540 static void phylink_get_fixed_state(struct phylink *pl, 1541 struct phylink_link_state *state) 1542 { 1543 *state = pl->link_config; 1544 if (pl->config->get_fixed_state) 1545 pl->config->get_fixed_state(pl->config, state); 1546 else if (pl->link_gpio) 1547 state->link = !!gpiod_get_value_cansleep(pl->link_gpio); 1548 1549 state->pause = MLO_PAUSE_NONE; 1550 phylink_resolve_an_pause(state); 1551 } 1552 1553 static void phylink_mac_initial_config(struct phylink *pl, bool force_restart) 1554 { 1555 struct phylink_link_state link_state; 1556 1557 switch (pl->req_link_an_mode) { 1558 case MLO_AN_PHY: 1559 link_state = pl->phy_state; 1560 break; 1561 1562 case MLO_AN_FIXED: 1563 phylink_get_fixed_state(pl, &link_state); 1564 break; 1565 1566 case MLO_AN_INBAND: 1567 link_state = pl->link_config; 1568 if (link_state.interface == PHY_INTERFACE_MODE_SGMII) 1569 link_state.pause = MLO_PAUSE_NONE; 1570 break; 1571 1572 default: /* can't happen */ 1573 return; 1574 } 1575 1576 link_state.link = false; 1577 1578 phylink_apply_manual_flow(pl, &link_state); 1579 phylink_major_config(pl, force_restart, &link_state); 1580 } 1581 1582 static const char *phylink_pause_to_str(int pause) 1583 { 1584 switch (pause & MLO_PAUSE_TXRX_MASK) { 1585 case MLO_PAUSE_TX | MLO_PAUSE_RX: 1586 return "rx/tx"; 1587 case MLO_PAUSE_TX: 1588 return "tx"; 1589 case MLO_PAUSE_RX: 1590 return "rx"; 1591 default: 1592 return "off"; 1593 } 1594 } 1595 1596 static void phylink_deactivate_lpi(struct phylink *pl) 1597 { 1598 if (pl->mac_enable_tx_lpi) { 1599 pl->mac_enable_tx_lpi = false; 1600 1601 phylink_dbg(pl, "disabling LPI\n"); 1602 1603 pl->mac_ops->mac_disable_tx_lpi(pl->config); 1604 } 1605 } 1606 1607 static void phylink_activate_lpi(struct phylink *pl) 1608 { 1609 int err; 1610 1611 if (!test_bit(pl->cur_interface, pl->config->lpi_interfaces)) { 1612 phylink_dbg(pl, "MAC does not support LPI with %s\n", 1613 phy_modes(pl->cur_interface)); 1614 return; 1615 } 1616 1617 phylink_dbg(pl, "LPI timer %uus, tx clock stop %u\n", 1618 pl->mac_tx_lpi_timer, pl->mac_tx_clk_stop); 1619 1620 err = pl->mac_ops->mac_enable_tx_lpi(pl->config, pl->mac_tx_lpi_timer, 1621 pl->mac_tx_clk_stop); 1622 if (!err) 1623 pl->mac_enable_tx_lpi = true; 1624 else 1625 phylink_err(pl, "%ps() failed: %pe\n", 1626 pl->mac_ops->mac_enable_tx_lpi, ERR_PTR(err)); 1627 } 1628 1629 static void phylink_link_up(struct phylink *pl, 1630 struct phylink_link_state link_state) 1631 { 1632 struct net_device *ndev = pl->netdev; 1633 unsigned int neg_mode; 1634 int speed, duplex; 1635 bool rx_pause; 1636 1637 speed = link_state.speed; 1638 duplex = link_state.duplex; 1639 rx_pause = !!(link_state.pause & MLO_PAUSE_RX); 1640 1641 switch (link_state.rate_matching) { 1642 case RATE_MATCH_PAUSE: 1643 /* The PHY is doing rate matchion from the media rate (in 1644 * the link_state) to the interface speed, and will send 1645 * pause frames to the MAC to limit its transmission speed. 1646 */ 1647 speed = phylink_interface_max_speed(link_state.interface); 1648 duplex = DUPLEX_FULL; 1649 rx_pause = true; 1650 break; 1651 1652 case RATE_MATCH_CRS: 1653 /* The PHY is doing rate matchion from the media rate (in 1654 * the link_state) to the interface speed, and will cause 1655 * collisions to the MAC to limit its transmission speed. 1656 */ 1657 speed = phylink_interface_max_speed(link_state.interface); 1658 duplex = DUPLEX_HALF; 1659 break; 1660 } 1661 1662 pl->cur_interface = link_state.interface; 1663 1664 neg_mode = pl->act_link_an_mode; 1665 if (pl->pcs && pl->pcs->neg_mode) 1666 neg_mode = pl->pcs_neg_mode; 1667 1668 phylink_pcs_link_up(pl->pcs, neg_mode, pl->cur_interface, speed, 1669 duplex); 1670 1671 pl->mac_ops->mac_link_up(pl->config, pl->phydev, pl->act_link_an_mode, 1672 pl->cur_interface, speed, duplex, 1673 !!(link_state.pause & MLO_PAUSE_TX), rx_pause); 1674 1675 if (pl->mac_supports_eee && pl->phy_enable_tx_lpi) 1676 phylink_activate_lpi(pl); 1677 1678 if (ndev) 1679 netif_carrier_on(ndev); 1680 1681 phylink_info(pl, 1682 "Link is Up - %s/%s - flow control %s\n", 1683 phy_speed_to_str(link_state.speed), 1684 phy_duplex_to_str(link_state.duplex), 1685 phylink_pause_to_str(link_state.pause)); 1686 } 1687 1688 static void phylink_link_down(struct phylink *pl) 1689 { 1690 struct net_device *ndev = pl->netdev; 1691 1692 if (ndev) 1693 netif_carrier_off(ndev); 1694 1695 phylink_deactivate_lpi(pl); 1696 1697 pl->mac_ops->mac_link_down(pl->config, pl->act_link_an_mode, 1698 pl->cur_interface); 1699 phylink_info(pl, "Link is Down\n"); 1700 } 1701 1702 static bool phylink_link_is_up(struct phylink *pl) 1703 { 1704 return pl->netdev ? netif_carrier_ok(pl->netdev) : pl->old_link_state; 1705 } 1706 1707 static void phylink_resolve(struct work_struct *w) 1708 { 1709 struct phylink *pl = container_of(w, struct phylink, resolve); 1710 struct phylink_link_state link_state; 1711 bool mac_config = false; 1712 bool retrigger = false; 1713 bool cur_link_state; 1714 1715 mutex_lock(&pl->state_mutex); 1716 cur_link_state = phylink_link_is_up(pl); 1717 1718 if (pl->phylink_disable_state) { 1719 pl->link_failed = false; 1720 link_state.link = false; 1721 } else if (pl->link_failed) { 1722 link_state.link = false; 1723 retrigger = true; 1724 } else if (pl->act_link_an_mode == MLO_AN_FIXED) { 1725 phylink_get_fixed_state(pl, &link_state); 1726 mac_config = link_state.link; 1727 } else if (pl->act_link_an_mode == MLO_AN_PHY) { 1728 link_state = pl->phy_state; 1729 mac_config = link_state.link; 1730 } else { 1731 phylink_mac_pcs_get_state(pl, &link_state); 1732 1733 /* The PCS may have a latching link-fail indicator. If the link 1734 * was up, bring the link down and re-trigger the resolve. 1735 * Otherwise, re-read the PCS state to get the current status 1736 * of the link. 1737 */ 1738 if (!link_state.link) { 1739 if (cur_link_state) 1740 retrigger = true; 1741 else 1742 phylink_mac_pcs_get_state(pl, &link_state); 1743 } 1744 1745 /* If we have a phy, the "up" state is the union of both the 1746 * PHY and the MAC 1747 */ 1748 if (pl->phydev) 1749 link_state.link &= pl->phy_state.link; 1750 1751 /* Only update if the PHY link is up */ 1752 if (pl->phydev && pl->phy_state.link) { 1753 /* If the interface has changed, force a link down 1754 * event if the link isn't already down, and re-resolve. 1755 */ 1756 if (link_state.interface != pl->phy_state.interface) { 1757 retrigger = true; 1758 link_state.link = false; 1759 } 1760 1761 link_state.interface = pl->phy_state.interface; 1762 1763 /* If we are doing rate matching, then the link 1764 * speed/duplex comes from the PHY 1765 */ 1766 if (pl->phy_state.rate_matching) { 1767 link_state.rate_matching = 1768 pl->phy_state.rate_matching; 1769 link_state.speed = pl->phy_state.speed; 1770 link_state.duplex = pl->phy_state.duplex; 1771 } 1772 1773 /* If we have a PHY, we need to update with the PHY 1774 * flow control bits. 1775 */ 1776 link_state.pause = pl->phy_state.pause; 1777 mac_config = true; 1778 } 1779 } 1780 1781 if (pl->act_link_an_mode != MLO_AN_FIXED) 1782 phylink_apply_manual_flow(pl, &link_state); 1783 1784 if (mac_config) { 1785 if (link_state.interface != pl->link_config.interface) { 1786 /* The interface has changed, force the link down and 1787 * then reconfigure. 1788 */ 1789 if (cur_link_state) { 1790 phylink_link_down(pl); 1791 cur_link_state = false; 1792 } 1793 phylink_major_config(pl, false, &link_state); 1794 pl->link_config.interface = link_state.interface; 1795 } 1796 } 1797 1798 if (link_state.link != cur_link_state) { 1799 pl->old_link_state = link_state.link; 1800 if (!link_state.link) 1801 phylink_link_down(pl); 1802 else 1803 phylink_link_up(pl, link_state); 1804 } 1805 if (!link_state.link && retrigger) { 1806 pl->link_failed = false; 1807 queue_work(system_power_efficient_wq, &pl->resolve); 1808 } 1809 mutex_unlock(&pl->state_mutex); 1810 } 1811 1812 static void phylink_run_resolve(struct phylink *pl) 1813 { 1814 if (!pl->phylink_disable_state) 1815 queue_work(system_power_efficient_wq, &pl->resolve); 1816 } 1817 1818 static void phylink_run_resolve_and_disable(struct phylink *pl, int bit) 1819 { 1820 unsigned long state = pl->phylink_disable_state; 1821 1822 set_bit(bit, &pl->phylink_disable_state); 1823 if (state == 0) { 1824 queue_work(system_power_efficient_wq, &pl->resolve); 1825 flush_work(&pl->resolve); 1826 } 1827 } 1828 1829 static void phylink_enable_and_run_resolve(struct phylink *pl, int bit) 1830 { 1831 clear_bit(bit, &pl->phylink_disable_state); 1832 phylink_run_resolve(pl); 1833 } 1834 1835 static void phylink_fixed_poll(struct timer_list *t) 1836 { 1837 struct phylink *pl = container_of(t, struct phylink, link_poll); 1838 1839 mod_timer(t, jiffies + HZ); 1840 1841 phylink_run_resolve(pl); 1842 } 1843 1844 static const struct sfp_upstream_ops sfp_phylink_ops; 1845 1846 static int phylink_register_sfp(struct phylink *pl, 1847 const struct fwnode_handle *fwnode) 1848 { 1849 struct sfp_bus *bus; 1850 int ret; 1851 1852 if (!fwnode) 1853 return 0; 1854 1855 bus = sfp_bus_find_fwnode(fwnode); 1856 if (IS_ERR(bus)) { 1857 phylink_err(pl, "unable to attach SFP bus: %pe\n", bus); 1858 return PTR_ERR(bus); 1859 } 1860 1861 pl->sfp_bus = bus; 1862 1863 ret = sfp_bus_add_upstream(bus, pl, &sfp_phylink_ops); 1864 sfp_bus_put(bus); 1865 1866 return ret; 1867 } 1868 1869 /** 1870 * phylink_set_fixed_link() - set the fixed link 1871 * @pl: a pointer to a &struct phylink returned from phylink_create() 1872 * @state: a pointer to a struct phylink_link_state. 1873 * 1874 * This function is used when the link parameters are known and do not change, 1875 * making it suitable for certain types of network connections. 1876 * 1877 * Returns: zero on success or negative error code. 1878 */ 1879 int phylink_set_fixed_link(struct phylink *pl, 1880 const struct phylink_link_state *state) 1881 { 1882 const struct phy_setting *s; 1883 unsigned long *adv; 1884 1885 if (pl->cfg_link_an_mode != MLO_AN_PHY || !state || 1886 !test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) 1887 return -EINVAL; 1888 1889 s = phy_lookup_setting(state->speed, state->duplex, 1890 pl->supported, true); 1891 if (!s) 1892 return -EINVAL; 1893 1894 adv = pl->link_config.advertising; 1895 linkmode_zero(adv); 1896 linkmode_set_bit(s->bit, adv); 1897 linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, adv); 1898 1899 pl->link_config.speed = state->speed; 1900 pl->link_config.duplex = state->duplex; 1901 pl->link_config.link = 1; 1902 pl->link_config.an_complete = 1; 1903 1904 pl->cfg_link_an_mode = MLO_AN_FIXED; 1905 pl->req_link_an_mode = pl->cfg_link_an_mode; 1906 1907 return 0; 1908 } 1909 EXPORT_SYMBOL_GPL(phylink_set_fixed_link); 1910 1911 /** 1912 * phylink_create() - create a phylink instance 1913 * @config: a pointer to the target &struct phylink_config 1914 * @fwnode: a pointer to a &struct fwnode_handle describing the network 1915 * interface 1916 * @iface: the desired link mode defined by &typedef phy_interface_t 1917 * @mac_ops: a pointer to a &struct phylink_mac_ops for the MAC. 1918 * 1919 * Create a new phylink instance, and parse the link parameters found in @np. 1920 * This will parse in-band modes, fixed-link or SFP configuration. 1921 * 1922 * Note: the rtnl lock must not be held when calling this function. 1923 * 1924 * Returns a pointer to a &struct phylink, or an error-pointer value. Users 1925 * must use IS_ERR() to check for errors from this function. 1926 */ 1927 struct phylink *phylink_create(struct phylink_config *config, 1928 const struct fwnode_handle *fwnode, 1929 phy_interface_t iface, 1930 const struct phylink_mac_ops *mac_ops) 1931 { 1932 struct phylink *pl; 1933 int ret; 1934 1935 /* Validate the supplied configuration */ 1936 if (phy_interface_empty(config->supported_interfaces)) { 1937 dev_err(config->dev, 1938 "phylink: error: empty supported_interfaces\n"); 1939 return ERR_PTR(-EINVAL); 1940 } 1941 1942 pl = kzalloc(sizeof(*pl), GFP_KERNEL); 1943 if (!pl) 1944 return ERR_PTR(-ENOMEM); 1945 1946 mutex_init(&pl->state_mutex); 1947 INIT_WORK(&pl->resolve, phylink_resolve); 1948 1949 pl->config = config; 1950 if (config->type == PHYLINK_NETDEV) { 1951 pl->netdev = to_net_dev(config->dev); 1952 netif_carrier_off(pl->netdev); 1953 } else if (config->type == PHYLINK_DEV) { 1954 pl->dev = config->dev; 1955 } else { 1956 kfree(pl); 1957 return ERR_PTR(-EINVAL); 1958 } 1959 1960 pl->mac_supports_eee_ops = mac_ops->mac_disable_tx_lpi && 1961 mac_ops->mac_enable_tx_lpi; 1962 pl->mac_supports_eee = pl->mac_supports_eee_ops && 1963 pl->config->lpi_capabilities && 1964 !phy_interface_empty(pl->config->lpi_interfaces); 1965 1966 /* Set the default EEE configuration */ 1967 pl->eee_cfg.eee_enabled = pl->config->eee_enabled_default; 1968 pl->eee_cfg.tx_lpi_enabled = pl->eee_cfg.eee_enabled; 1969 pl->eee_cfg.tx_lpi_timer = pl->config->lpi_timer_default; 1970 1971 pl->phy_state.interface = iface; 1972 pl->link_interface = iface; 1973 if (iface == PHY_INTERFACE_MODE_MOCA) 1974 pl->link_port = PORT_BNC; 1975 else 1976 pl->link_port = PORT_MII; 1977 pl->link_config.interface = iface; 1978 pl->link_config.pause = MLO_PAUSE_AN; 1979 pl->link_config.speed = SPEED_UNKNOWN; 1980 pl->link_config.duplex = DUPLEX_UNKNOWN; 1981 pl->pcs_state = PCS_STATE_DOWN; 1982 pl->mac_ops = mac_ops; 1983 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); 1984 timer_setup(&pl->link_poll, phylink_fixed_poll, 0); 1985 1986 linkmode_fill(pl->supported); 1987 linkmode_copy(pl->link_config.advertising, pl->supported); 1988 phylink_validate(pl, pl->supported, &pl->link_config); 1989 1990 ret = phylink_parse_mode(pl, fwnode); 1991 if (ret < 0) { 1992 kfree(pl); 1993 return ERR_PTR(ret); 1994 } 1995 1996 if (pl->cfg_link_an_mode == MLO_AN_FIXED) { 1997 ret = phylink_parse_fixedlink(pl, fwnode); 1998 if (ret < 0) { 1999 kfree(pl); 2000 return ERR_PTR(ret); 2001 } 2002 } 2003 2004 pl->req_link_an_mode = pl->cfg_link_an_mode; 2005 2006 ret = phylink_register_sfp(pl, fwnode); 2007 if (ret < 0) { 2008 kfree(pl); 2009 return ERR_PTR(ret); 2010 } 2011 2012 return pl; 2013 } 2014 EXPORT_SYMBOL_GPL(phylink_create); 2015 2016 /** 2017 * phylink_destroy() - cleanup and destroy the phylink instance 2018 * @pl: a pointer to a &struct phylink returned from phylink_create() 2019 * 2020 * Destroy a phylink instance. Any PHY that has been attached must have been 2021 * cleaned up via phylink_disconnect_phy() prior to calling this function. 2022 * 2023 * Note: the rtnl lock must not be held when calling this function. 2024 */ 2025 void phylink_destroy(struct phylink *pl) 2026 { 2027 sfp_bus_del_upstream(pl->sfp_bus); 2028 if (pl->link_gpio) 2029 gpiod_put(pl->link_gpio); 2030 2031 cancel_work_sync(&pl->resolve); 2032 kfree(pl); 2033 } 2034 EXPORT_SYMBOL_GPL(phylink_destroy); 2035 2036 /** 2037 * phylink_expects_phy() - Determine if phylink expects a phy to be attached 2038 * @pl: a pointer to a &struct phylink returned from phylink_create() 2039 * 2040 * When using fixed-link mode, or in-band mode with 1000base-X or 2500base-X, 2041 * no PHY is needed. 2042 * 2043 * Returns true if phylink will be expecting a PHY. 2044 */ 2045 bool phylink_expects_phy(struct phylink *pl) 2046 { 2047 if (pl->cfg_link_an_mode == MLO_AN_FIXED || 2048 (pl->cfg_link_an_mode == MLO_AN_INBAND && 2049 phy_interface_mode_is_8023z(pl->link_config.interface))) 2050 return false; 2051 return true; 2052 } 2053 EXPORT_SYMBOL_GPL(phylink_expects_phy); 2054 2055 static void phylink_phy_change(struct phy_device *phydev, bool up) 2056 { 2057 struct phylink *pl = phydev->phylink; 2058 bool tx_pause, rx_pause; 2059 2060 phy_get_pause(phydev, &tx_pause, &rx_pause); 2061 2062 mutex_lock(&pl->state_mutex); 2063 pl->phy_state.speed = phydev->speed; 2064 pl->phy_state.duplex = phydev->duplex; 2065 pl->phy_state.rate_matching = phydev->rate_matching; 2066 pl->phy_state.pause = MLO_PAUSE_NONE; 2067 if (tx_pause) 2068 pl->phy_state.pause |= MLO_PAUSE_TX; 2069 if (rx_pause) 2070 pl->phy_state.pause |= MLO_PAUSE_RX; 2071 pl->phy_state.interface = phydev->interface; 2072 pl->phy_state.link = up; 2073 if (!up) 2074 pl->link_failed = true; 2075 2076 /* Get the LPI state from phylib */ 2077 pl->phy_enable_tx_lpi = phydev->enable_tx_lpi; 2078 pl->mac_tx_lpi_timer = phydev->eee_cfg.tx_lpi_timer; 2079 mutex_unlock(&pl->state_mutex); 2080 2081 phylink_run_resolve(pl); 2082 2083 phylink_dbg(pl, "phy link %s %s/%s/%s/%s/%s/%slpi\n", 2084 up ? "up" : "down", 2085 phy_modes(phydev->interface), 2086 phy_speed_to_str(phydev->speed), 2087 phy_duplex_to_str(phydev->duplex), 2088 phy_rate_matching_to_str(phydev->rate_matching), 2089 phylink_pause_to_str(pl->phy_state.pause), 2090 phydev->enable_tx_lpi ? "" : "no"); 2091 } 2092 2093 static int phylink_validate_phy(struct phylink *pl, struct phy_device *phy, 2094 unsigned long *supported, 2095 struct phylink_link_state *state) 2096 { 2097 DECLARE_PHY_INTERFACE_MASK(interfaces); 2098 2099 /* If the PHY provides a bitmap of the interfaces it will be using 2100 * depending on the negotiated media speeds, use this to validate 2101 * which ethtool link modes can be used. 2102 */ 2103 if (!phy_interface_empty(phy->possible_interfaces)) { 2104 /* We only care about the union of the PHY's interfaces and 2105 * those which the host supports. 2106 */ 2107 phy_interface_and(interfaces, phy->possible_interfaces, 2108 pl->config->supported_interfaces); 2109 2110 if (phy_interface_empty(interfaces)) { 2111 phylink_err(pl, "PHY has no common interfaces\n"); 2112 return -EINVAL; 2113 } 2114 2115 if (phy_on_sfp(phy)) { 2116 /* If the PHY is on a SFP, limit the interfaces to 2117 * those that can be used with a SFP module. 2118 */ 2119 phy_interface_and(interfaces, interfaces, 2120 phylink_sfp_interfaces); 2121 2122 if (phy_interface_empty(interfaces)) { 2123 phylink_err(pl, "SFP PHY's possible interfaces becomes empty\n"); 2124 return -EINVAL; 2125 } 2126 } 2127 2128 phylink_dbg(pl, "PHY %s uses interfaces %*pbl, validating %*pbl\n", 2129 phydev_name(phy), 2130 (int)PHY_INTERFACE_MODE_MAX, 2131 phy->possible_interfaces, 2132 (int)PHY_INTERFACE_MODE_MAX, interfaces); 2133 2134 return phylink_validate_mask(pl, phy, supported, state, 2135 interfaces); 2136 } 2137 2138 phylink_dbg(pl, "PHY %s doesn't supply possible interfaces\n", 2139 phydev_name(phy)); 2140 2141 /* Check whether we would use rate matching for the proposed interface 2142 * mode. 2143 */ 2144 state->rate_matching = phy_get_rate_matching(phy, state->interface); 2145 2146 /* Clause 45 PHYs may switch their Serdes lane between, e.g. 10GBASE-R, 2147 * 5GBASE-R, 2500BASE-X and SGMII if they are not using rate matching. 2148 * For some interface modes (e.g. RXAUI, XAUI and USXGMII) switching 2149 * their Serdes is either unnecessary or not reasonable. 2150 * 2151 * For these which switch interface modes, we really need to know which 2152 * interface modes the PHY supports to properly work out which ethtool 2153 * linkmodes can be supported. For now, as a work-around, we validate 2154 * against all interface modes, which may lead to more ethtool link 2155 * modes being advertised than are actually supported. 2156 */ 2157 if (phy->is_c45 && state->rate_matching == RATE_MATCH_NONE && 2158 state->interface != PHY_INTERFACE_MODE_RXAUI && 2159 state->interface != PHY_INTERFACE_MODE_XAUI && 2160 state->interface != PHY_INTERFACE_MODE_USXGMII) 2161 state->interface = PHY_INTERFACE_MODE_NA; 2162 2163 return phylink_validate(pl, supported, state); 2164 } 2165 2166 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy, 2167 phy_interface_t interface) 2168 { 2169 struct phylink_link_state config; 2170 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); 2171 char *irq_str; 2172 int ret; 2173 2174 /* 2175 * This is the new way of dealing with flow control for PHYs, 2176 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 2177 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 2178 * using our validate call to the MAC, we rely upon the MAC 2179 * clearing the bits from both supported and advertising fields. 2180 */ 2181 phy_support_asym_pause(phy); 2182 2183 memset(&config, 0, sizeof(config)); 2184 linkmode_copy(supported, phy->supported); 2185 linkmode_copy(config.advertising, phy->advertising); 2186 config.interface = interface; 2187 2188 ret = phylink_validate_phy(pl, phy, supported, &config); 2189 if (ret) { 2190 phylink_warn(pl, "validation of %s with support %*pb and advertisement %*pb failed: %pe\n", 2191 phy_modes(config.interface), 2192 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->supported, 2193 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising, 2194 ERR_PTR(ret)); 2195 return ret; 2196 } 2197 2198 phy->phylink = pl; 2199 phy->phy_link_change = phylink_phy_change; 2200 2201 irq_str = phy_attached_info_irq(phy); 2202 phylink_info(pl, 2203 "PHY [%s] driver [%s] (irq=%s)\n", 2204 dev_name(&phy->mdio.dev), phy->drv->name, irq_str); 2205 kfree(irq_str); 2206 2207 mutex_lock(&phy->lock); 2208 mutex_lock(&pl->state_mutex); 2209 pl->phydev = phy; 2210 pl->phy_state.interface = interface; 2211 pl->phy_state.pause = MLO_PAUSE_NONE; 2212 pl->phy_state.speed = SPEED_UNKNOWN; 2213 pl->phy_state.duplex = DUPLEX_UNKNOWN; 2214 pl->phy_state.rate_matching = RATE_MATCH_NONE; 2215 linkmode_copy(pl->supported, supported); 2216 linkmode_copy(pl->link_config.advertising, config.advertising); 2217 2218 /* Restrict the phy advertisement according to the MAC support. */ 2219 linkmode_copy(phy->advertising, config.advertising); 2220 2221 /* If the MAC supports phylink managed EEE, restrict the EEE 2222 * advertisement according to the MAC's LPI capabilities. 2223 */ 2224 if (pl->mac_supports_eee) { 2225 /* If EEE is enabled, then we need to call phy_support_eee() 2226 * to ensure that the advertising mask is appropriately set. 2227 * This also enables EEE at the PHY. 2228 */ 2229 if (pl->eee_cfg.eee_enabled) 2230 phy_support_eee(phy); 2231 2232 phy->eee_cfg.tx_lpi_enabled = pl->eee_cfg.tx_lpi_enabled; 2233 phy->eee_cfg.tx_lpi_timer = pl->eee_cfg.tx_lpi_timer; 2234 2235 /* Convert the MAC's LPI capabilities to linkmodes */ 2236 linkmode_zero(pl->supported_lpi); 2237 phylink_caps_to_linkmodes(pl->supported_lpi, 2238 pl->config->lpi_capabilities); 2239 2240 /* Restrict the PHYs EEE support/advertisement to the modes 2241 * that the MAC supports. 2242 */ 2243 linkmode_and(phy->advertising_eee, phy->advertising_eee, 2244 pl->supported_lpi); 2245 } else if (pl->mac_supports_eee_ops) { 2246 /* MAC supports phylink EEE, but wants EEE always disabled. */ 2247 phy_disable_eee(phy); 2248 } 2249 2250 mutex_unlock(&pl->state_mutex); 2251 mutex_unlock(&phy->lock); 2252 2253 phylink_dbg(pl, 2254 "phy: %s setting supported %*pb advertising %*pb\n", 2255 phy_modes(interface), 2256 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported, 2257 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising); 2258 2259 if (phy_interrupt_is_valid(phy)) 2260 phy_request_interrupt(phy); 2261 2262 if (pl->config->mac_managed_pm) 2263 phy->mac_managed_pm = true; 2264 2265 /* Allow the MAC to stop its clock if the PHY has the capability */ 2266 pl->mac_tx_clk_stop = phy_eee_tx_clock_stop_capable(phy) > 0; 2267 2268 /* Explicitly configure whether the PHY is allowed to stop it's 2269 * receive clock. 2270 */ 2271 ret = phy_eee_rx_clock_stop(phy, pl->config->eee_rx_clk_stop_enable); 2272 if (ret == -EOPNOTSUPP) 2273 ret = 0; 2274 2275 return ret; 2276 } 2277 2278 static int phylink_attach_phy(struct phylink *pl, struct phy_device *phy, 2279 phy_interface_t interface) 2280 { 2281 u32 flags = 0; 2282 2283 if (WARN_ON(pl->cfg_link_an_mode == MLO_AN_FIXED || 2284 (pl->cfg_link_an_mode == MLO_AN_INBAND && 2285 phy_interface_mode_is_8023z(interface) && !pl->sfp_bus))) 2286 return -EINVAL; 2287 2288 if (pl->phydev) 2289 return -EBUSY; 2290 2291 if (pl->config->mac_requires_rxc) 2292 flags |= PHY_F_RXC_ALWAYS_ON; 2293 2294 return phy_attach_direct(pl->netdev, phy, flags, interface); 2295 } 2296 2297 /** 2298 * phylink_connect_phy() - connect a PHY to the phylink instance 2299 * @pl: a pointer to a &struct phylink returned from phylink_create() 2300 * @phy: a pointer to a &struct phy_device. 2301 * 2302 * Connect @phy to the phylink instance specified by @pl by calling 2303 * phy_attach_direct(). Configure the @phy according to the MAC driver's 2304 * capabilities, start the PHYLIB state machine and enable any interrupts 2305 * that the PHY supports. 2306 * 2307 * This updates the phylink's ethtool supported and advertising link mode 2308 * masks. 2309 * 2310 * Returns 0 on success or a negative errno. 2311 */ 2312 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy) 2313 { 2314 int ret; 2315 2316 /* Use PHY device/driver interface */ 2317 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 2318 pl->link_interface = phy->interface; 2319 pl->link_config.interface = pl->link_interface; 2320 } 2321 2322 ret = phylink_attach_phy(pl, phy, pl->link_interface); 2323 if (ret < 0) 2324 return ret; 2325 2326 ret = phylink_bringup_phy(pl, phy, pl->link_config.interface); 2327 if (ret) 2328 phy_detach(phy); 2329 2330 return ret; 2331 } 2332 EXPORT_SYMBOL_GPL(phylink_connect_phy); 2333 2334 /** 2335 * phylink_of_phy_connect() - connect the PHY specified in the DT mode. 2336 * @pl: a pointer to a &struct phylink returned from phylink_create() 2337 * @dn: a pointer to a &struct device_node. 2338 * @flags: PHY-specific flags to communicate to the PHY device driver 2339 * 2340 * Connect the phy specified in the device node @dn to the phylink instance 2341 * specified by @pl. Actions specified in phylink_connect_phy() will be 2342 * performed. 2343 * 2344 * Returns 0 on success or a negative errno. 2345 */ 2346 int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn, 2347 u32 flags) 2348 { 2349 return phylink_fwnode_phy_connect(pl, of_fwnode_handle(dn), flags); 2350 } 2351 EXPORT_SYMBOL_GPL(phylink_of_phy_connect); 2352 2353 /** 2354 * phylink_fwnode_phy_connect() - connect the PHY specified in the fwnode. 2355 * @pl: a pointer to a &struct phylink returned from phylink_create() 2356 * @fwnode: a pointer to a &struct fwnode_handle. 2357 * @flags: PHY-specific flags to communicate to the PHY device driver 2358 * 2359 * Connect the phy specified @fwnode to the phylink instance specified 2360 * by @pl. 2361 * 2362 * Returns 0 on success or a negative errno. 2363 */ 2364 int phylink_fwnode_phy_connect(struct phylink *pl, 2365 const struct fwnode_handle *fwnode, 2366 u32 flags) 2367 { 2368 struct fwnode_handle *phy_fwnode; 2369 struct phy_device *phy_dev; 2370 int ret; 2371 2372 /* Fixed links and 802.3z are handled without needing a PHY */ 2373 if (pl->cfg_link_an_mode == MLO_AN_FIXED || 2374 (pl->cfg_link_an_mode == MLO_AN_INBAND && 2375 phy_interface_mode_is_8023z(pl->link_interface))) 2376 return 0; 2377 2378 phy_fwnode = fwnode_get_phy_node(fwnode); 2379 if (IS_ERR(phy_fwnode)) { 2380 if (pl->cfg_link_an_mode == MLO_AN_PHY) 2381 return -ENODEV; 2382 return 0; 2383 } 2384 2385 phy_dev = fwnode_phy_find_device(phy_fwnode); 2386 /* We're done with the phy_node handle */ 2387 fwnode_handle_put(phy_fwnode); 2388 if (!phy_dev) 2389 return -ENODEV; 2390 2391 /* Use PHY device/driver interface */ 2392 if (pl->link_interface == PHY_INTERFACE_MODE_NA) { 2393 pl->link_interface = phy_dev->interface; 2394 pl->link_config.interface = pl->link_interface; 2395 } 2396 2397 if (pl->config->mac_requires_rxc) 2398 flags |= PHY_F_RXC_ALWAYS_ON; 2399 2400 ret = phy_attach_direct(pl->netdev, phy_dev, flags, 2401 pl->link_interface); 2402 phy_device_free(phy_dev); 2403 if (ret) 2404 return ret; 2405 2406 ret = phylink_bringup_phy(pl, phy_dev, pl->link_config.interface); 2407 if (ret) 2408 phy_detach(phy_dev); 2409 2410 return ret; 2411 } 2412 EXPORT_SYMBOL_GPL(phylink_fwnode_phy_connect); 2413 2414 /** 2415 * phylink_disconnect_phy() - disconnect any PHY attached to the phylink 2416 * instance. 2417 * @pl: a pointer to a &struct phylink returned from phylink_create() 2418 * 2419 * Disconnect any current PHY from the phylink instance described by @pl. 2420 */ 2421 void phylink_disconnect_phy(struct phylink *pl) 2422 { 2423 struct phy_device *phy; 2424 2425 ASSERT_RTNL(); 2426 2427 phy = pl->phydev; 2428 if (phy) { 2429 mutex_lock(&phy->lock); 2430 mutex_lock(&pl->state_mutex); 2431 pl->phydev = NULL; 2432 pl->phy_enable_tx_lpi = false; 2433 pl->mac_tx_clk_stop = false; 2434 mutex_unlock(&pl->state_mutex); 2435 mutex_unlock(&phy->lock); 2436 flush_work(&pl->resolve); 2437 2438 phy_disconnect(phy); 2439 } 2440 } 2441 EXPORT_SYMBOL_GPL(phylink_disconnect_phy); 2442 2443 static void phylink_link_changed(struct phylink *pl, bool up, const char *what) 2444 { 2445 if (!up) 2446 pl->link_failed = true; 2447 phylink_run_resolve(pl); 2448 phylink_dbg(pl, "%s link %s\n", what, up ? "up" : "down"); 2449 } 2450 2451 /** 2452 * phylink_mac_change() - notify phylink of a change in MAC state 2453 * @pl: a pointer to a &struct phylink returned from phylink_create() 2454 * @up: indicates whether the link is currently up. 2455 * 2456 * The MAC driver should call this driver when the state of its link 2457 * changes (eg, link failure, new negotiation results, etc.) 2458 */ 2459 void phylink_mac_change(struct phylink *pl, bool up) 2460 { 2461 phylink_link_changed(pl, up, "mac"); 2462 } 2463 EXPORT_SYMBOL_GPL(phylink_mac_change); 2464 2465 /** 2466 * phylink_pcs_change() - notify phylink of a change to PCS link state 2467 * @pcs: pointer to &struct phylink_pcs 2468 * @up: indicates whether the link is currently up. 2469 * 2470 * The PCS driver should call this when the state of its link changes 2471 * (e.g. link failure, new negotiation results, etc.) Note: it should 2472 * not determine "up" by reading the BMSR. If in doubt about the link 2473 * state at interrupt time, then pass true if pcs_get_state() returns 2474 * the latched link-down state, otherwise pass false. 2475 */ 2476 void phylink_pcs_change(struct phylink_pcs *pcs, bool up) 2477 { 2478 struct phylink *pl = pcs->phylink; 2479 2480 if (pl) 2481 phylink_link_changed(pl, up, "pcs"); 2482 } 2483 EXPORT_SYMBOL_GPL(phylink_pcs_change); 2484 2485 static irqreturn_t phylink_link_handler(int irq, void *data) 2486 { 2487 struct phylink *pl = data; 2488 2489 phylink_run_resolve(pl); 2490 2491 return IRQ_HANDLED; 2492 } 2493 2494 /** 2495 * phylink_start() - start a phylink instance 2496 * @pl: a pointer to a &struct phylink returned from phylink_create() 2497 * 2498 * Start the phylink instance specified by @pl, configuring the MAC for the 2499 * desired link mode(s) and negotiation style. This should be called from the 2500 * network device driver's &struct net_device_ops ndo_open() method. 2501 */ 2502 void phylink_start(struct phylink *pl) 2503 { 2504 bool poll = false; 2505 2506 ASSERT_RTNL(); 2507 2508 phylink_info(pl, "configuring for %s/%s link mode\n", 2509 phylink_an_mode_str(pl->req_link_an_mode), 2510 phy_modes(pl->link_config.interface)); 2511 2512 /* Always set the carrier off */ 2513 if (pl->netdev) 2514 netif_carrier_off(pl->netdev); 2515 2516 pl->pcs_state = PCS_STATE_STARTING; 2517 2518 /* Apply the link configuration to the MAC when starting. This allows 2519 * a fixed-link to start with the correct parameters, and also 2520 * ensures that we set the appropriate advertisement for Serdes links. 2521 * 2522 * Restart autonegotiation if using 802.3z to ensure that the link 2523 * parameters are properly negotiated. This is necessary for DSA 2524 * switches using 802.3z negotiation to ensure they see our modes. 2525 */ 2526 phylink_mac_initial_config(pl, true); 2527 2528 pl->pcs_state = PCS_STATE_STARTED; 2529 2530 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_STOPPED); 2531 2532 if (pl->cfg_link_an_mode == MLO_AN_FIXED && pl->link_gpio) { 2533 int irq = gpiod_to_irq(pl->link_gpio); 2534 2535 if (irq > 0) { 2536 if (!request_irq(irq, phylink_link_handler, 2537 IRQF_TRIGGER_RISING | 2538 IRQF_TRIGGER_FALLING, 2539 "netdev link", pl)) 2540 pl->link_irq = irq; 2541 else 2542 irq = 0; 2543 } 2544 if (irq <= 0) 2545 poll = true; 2546 } 2547 2548 if (pl->cfg_link_an_mode == MLO_AN_FIXED) 2549 poll |= pl->config->poll_fixed_state; 2550 2551 if (poll) 2552 mod_timer(&pl->link_poll, jiffies + HZ); 2553 if (pl->phydev) 2554 phy_start(pl->phydev); 2555 if (pl->sfp_bus) 2556 sfp_upstream_start(pl->sfp_bus); 2557 } 2558 EXPORT_SYMBOL_GPL(phylink_start); 2559 2560 /** 2561 * phylink_stop() - stop a phylink instance 2562 * @pl: a pointer to a &struct phylink returned from phylink_create() 2563 * 2564 * Stop the phylink instance specified by @pl. This should be called from the 2565 * network device driver's &struct net_device_ops ndo_stop() method. The 2566 * network device's carrier state should not be changed prior to calling this 2567 * function. 2568 * 2569 * This will synchronously bring down the link if the link is not already 2570 * down (in other words, it will trigger a mac_link_down() method call.) 2571 */ 2572 void phylink_stop(struct phylink *pl) 2573 { 2574 ASSERT_RTNL(); 2575 2576 if (pl->sfp_bus) 2577 sfp_upstream_stop(pl->sfp_bus); 2578 if (pl->phydev) 2579 phy_stop(pl->phydev); 2580 del_timer_sync(&pl->link_poll); 2581 if (pl->link_irq) { 2582 free_irq(pl->link_irq, pl); 2583 pl->link_irq = 0; 2584 } 2585 2586 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED); 2587 2588 pl->pcs_state = PCS_STATE_DOWN; 2589 2590 phylink_pcs_disable(pl->pcs); 2591 } 2592 EXPORT_SYMBOL_GPL(phylink_stop); 2593 2594 /** 2595 * phylink_suspend() - handle a network device suspend event 2596 * @pl: a pointer to a &struct phylink returned from phylink_create() 2597 * @mac_wol: true if the MAC needs to receive packets for Wake-on-Lan 2598 * 2599 * Handle a network device suspend event. There are several cases: 2600 * 2601 * - If Wake-on-Lan is not active, we can bring down the link between 2602 * the MAC and PHY by calling phylink_stop(). 2603 * - If Wake-on-Lan is active, and being handled only by the PHY, we 2604 * can also bring down the link between the MAC and PHY. 2605 * - If Wake-on-Lan is active, but being handled by the MAC, the MAC 2606 * still needs to receive packets, so we can not bring the link down. 2607 */ 2608 void phylink_suspend(struct phylink *pl, bool mac_wol) 2609 { 2610 ASSERT_RTNL(); 2611 2612 if (mac_wol && (!pl->netdev || pl->netdev->ethtool->wol_enabled)) { 2613 /* Wake-on-Lan enabled, MAC handling */ 2614 mutex_lock(&pl->state_mutex); 2615 2616 /* Stop the resolver bringing the link up */ 2617 __set_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state); 2618 2619 /* Disable the carrier, to prevent transmit timeouts, 2620 * but one would hope all packets have been sent. This 2621 * also means phylink_resolve() will do nothing. 2622 */ 2623 if (pl->netdev) 2624 netif_carrier_off(pl->netdev); 2625 else 2626 pl->old_link_state = false; 2627 2628 /* We do not call mac_link_down() here as we want the 2629 * link to remain up to receive the WoL packets. 2630 */ 2631 mutex_unlock(&pl->state_mutex); 2632 } else { 2633 phylink_stop(pl); 2634 } 2635 } 2636 EXPORT_SYMBOL_GPL(phylink_suspend); 2637 2638 /** 2639 * phylink_resume() - handle a network device resume event 2640 * @pl: a pointer to a &struct phylink returned from phylink_create() 2641 * 2642 * Undo the effects of phylink_suspend(), returning the link to an 2643 * operational state. 2644 */ 2645 void phylink_resume(struct phylink *pl) 2646 { 2647 ASSERT_RTNL(); 2648 2649 if (test_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state)) { 2650 /* Wake-on-Lan enabled, MAC handling */ 2651 2652 /* Call mac_link_down() so we keep the overall state balanced. 2653 * Do this under the state_mutex lock for consistency. This 2654 * will cause a "Link Down" message to be printed during 2655 * resume, which is harmless - the true link state will be 2656 * printed when we run a resolve. 2657 */ 2658 mutex_lock(&pl->state_mutex); 2659 phylink_link_down(pl); 2660 mutex_unlock(&pl->state_mutex); 2661 2662 /* Re-apply the link parameters so that all the settings get 2663 * restored to the MAC. 2664 */ 2665 phylink_mac_initial_config(pl, true); 2666 2667 /* Re-enable and re-resolve the link parameters */ 2668 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_MAC_WOL); 2669 } else { 2670 phylink_start(pl); 2671 } 2672 } 2673 EXPORT_SYMBOL_GPL(phylink_resume); 2674 2675 /** 2676 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY 2677 * @pl: a pointer to a &struct phylink returned from phylink_create() 2678 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters 2679 * 2680 * Read the wake on lan parameters from the PHY attached to the phylink 2681 * instance specified by @pl. If no PHY is currently attached, report no 2682 * support for wake on lan. 2683 */ 2684 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 2685 { 2686 ASSERT_RTNL(); 2687 2688 wol->supported = 0; 2689 wol->wolopts = 0; 2690 2691 if (pl->phydev) 2692 phy_ethtool_get_wol(pl->phydev, wol); 2693 } 2694 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol); 2695 2696 /** 2697 * phylink_ethtool_set_wol() - set wake on lan parameters 2698 * @pl: a pointer to a &struct phylink returned from phylink_create() 2699 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters 2700 * 2701 * Set the wake on lan parameters for the PHY attached to the phylink 2702 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP 2703 * error. 2704 * 2705 * Returns zero on success or negative errno code. 2706 */ 2707 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol) 2708 { 2709 int ret = -EOPNOTSUPP; 2710 2711 ASSERT_RTNL(); 2712 2713 if (pl->phydev) 2714 ret = phy_ethtool_set_wol(pl->phydev, wol); 2715 2716 return ret; 2717 } 2718 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol); 2719 2720 static phy_interface_t phylink_sfp_select_interface(struct phylink *pl, 2721 const unsigned long *link_modes) 2722 { 2723 phy_interface_t interface; 2724 2725 interface = sfp_select_interface(pl->sfp_bus, link_modes); 2726 if (interface == PHY_INTERFACE_MODE_NA) { 2727 phylink_err(pl, 2728 "selection of interface failed, advertisement %*pb\n", 2729 __ETHTOOL_LINK_MODE_MASK_NBITS, 2730 link_modes); 2731 return interface; 2732 } 2733 2734 if (!test_bit(interface, pl->config->supported_interfaces)) { 2735 phylink_err(pl, 2736 "selection of interface failed, SFP selected %s (%u) but MAC supports %*pbl\n", 2737 phy_modes(interface), interface, 2738 (int)PHY_INTERFACE_MODE_MAX, 2739 pl->config->supported_interfaces); 2740 return PHY_INTERFACE_MODE_NA; 2741 } 2742 2743 return interface; 2744 } 2745 2746 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b) 2747 { 2748 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask); 2749 2750 linkmode_zero(mask); 2751 phylink_set_port_modes(mask); 2752 2753 linkmode_and(dst, dst, mask); 2754 linkmode_or(dst, dst, b); 2755 } 2756 2757 static void phylink_get_ksettings(const struct phylink_link_state *state, 2758 struct ethtool_link_ksettings *kset) 2759 { 2760 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising); 2761 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising); 2762 if (kset->base.rate_matching == RATE_MATCH_NONE) { 2763 kset->base.speed = state->speed; 2764 kset->base.duplex = state->duplex; 2765 } 2766 kset->base.autoneg = linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2767 state->advertising) ? 2768 AUTONEG_ENABLE : AUTONEG_DISABLE; 2769 } 2770 2771 /** 2772 * phylink_ethtool_ksettings_get() - get the current link settings 2773 * @pl: a pointer to a &struct phylink returned from phylink_create() 2774 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings 2775 * 2776 * Read the current link settings for the phylink instance specified by @pl. 2777 * This will be the link settings read from the MAC, PHY or fixed link 2778 * settings depending on the current negotiation mode. 2779 */ 2780 int phylink_ethtool_ksettings_get(struct phylink *pl, 2781 struct ethtool_link_ksettings *kset) 2782 { 2783 struct phylink_link_state link_state; 2784 2785 ASSERT_RTNL(); 2786 2787 if (pl->phydev) 2788 phy_ethtool_ksettings_get(pl->phydev, kset); 2789 else 2790 kset->base.port = pl->link_port; 2791 2792 linkmode_copy(kset->link_modes.supported, pl->supported); 2793 2794 switch (pl->act_link_an_mode) { 2795 case MLO_AN_FIXED: 2796 /* We are using fixed settings. Report these as the 2797 * current link settings - and note that these also 2798 * represent the supported speeds/duplex/pause modes. 2799 */ 2800 phylink_get_fixed_state(pl, &link_state); 2801 phylink_get_ksettings(&link_state, kset); 2802 break; 2803 2804 case MLO_AN_INBAND: 2805 /* If there is a phy attached, then use the reported 2806 * settings from the phy with no modification. 2807 */ 2808 if (pl->phydev) 2809 break; 2810 2811 phylink_mac_pcs_get_state(pl, &link_state); 2812 2813 /* The MAC is reporting the link results from its own PCS 2814 * layer via in-band status. Report these as the current 2815 * link settings. 2816 */ 2817 phylink_get_ksettings(&link_state, kset); 2818 break; 2819 } 2820 2821 return 0; 2822 } 2823 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get); 2824 2825 static bool phylink_validate_pcs_inband_autoneg(struct phylink *pl, 2826 phy_interface_t interface, 2827 unsigned long *adv) 2828 { 2829 unsigned int inband = phylink_inband_caps(pl, interface); 2830 unsigned int mask; 2831 2832 /* If the PCS doesn't implement inband support, be permissive. */ 2833 if (!inband) 2834 return true; 2835 2836 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, adv)) 2837 mask = LINK_INBAND_ENABLE; 2838 else 2839 mask = LINK_INBAND_DISABLE; 2840 2841 /* Check whether the PCS implements the required mode */ 2842 return !!(inband & mask); 2843 } 2844 2845 /** 2846 * phylink_ethtool_ksettings_set() - set the link settings 2847 * @pl: a pointer to a &struct phylink returned from phylink_create() 2848 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes 2849 */ 2850 int phylink_ethtool_ksettings_set(struct phylink *pl, 2851 const struct ethtool_link_ksettings *kset) 2852 { 2853 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 2854 struct phylink_link_state config; 2855 const struct phy_setting *s; 2856 2857 ASSERT_RTNL(); 2858 2859 if (pl->phydev) { 2860 struct ethtool_link_ksettings phy_kset = *kset; 2861 2862 linkmode_and(phy_kset.link_modes.advertising, 2863 phy_kset.link_modes.advertising, 2864 pl->supported); 2865 2866 /* We can rely on phylib for this update; we also do not need 2867 * to update the pl->link_config settings: 2868 * - the configuration returned via ksettings_get() will come 2869 * from phylib whenever a PHY is present. 2870 * - link_config.interface will be updated by the PHY calling 2871 * back via phylink_phy_change() and a subsequent resolve. 2872 * - initial link configuration for PHY mode comes from the 2873 * last phy state updated via phylink_phy_change(). 2874 * - other configuration changes (e.g. pause modes) are 2875 * performed directly via phylib. 2876 * - if in in-band mode with a PHY, the link configuration 2877 * is passed on the link from the PHY, and all of 2878 * link_config.{speed,duplex,an_enabled,pause} are not used. 2879 * - the only possible use would be link_config.advertising 2880 * pause modes when in 1000base-X mode with a PHY, but in 2881 * the presence of a PHY, this should not be changed as that 2882 * should be determined from the media side advertisement. 2883 */ 2884 return phy_ethtool_ksettings_set(pl->phydev, &phy_kset); 2885 } 2886 2887 config = pl->link_config; 2888 /* Mask out unsupported advertisements */ 2889 linkmode_and(config.advertising, kset->link_modes.advertising, 2890 pl->supported); 2891 2892 /* FIXME: should we reject autoneg if phy/mac does not support it? */ 2893 switch (kset->base.autoneg) { 2894 case AUTONEG_DISABLE: 2895 /* Autonegotiation disabled, select a suitable speed and 2896 * duplex. 2897 */ 2898 s = phy_lookup_setting(kset->base.speed, kset->base.duplex, 2899 pl->supported, false); 2900 if (!s) 2901 return -EINVAL; 2902 2903 /* If we have a fixed link, refuse to change link parameters. 2904 * If the link parameters match, accept them but do nothing. 2905 */ 2906 if (pl->req_link_an_mode == MLO_AN_FIXED) { 2907 if (s->speed != pl->link_config.speed || 2908 s->duplex != pl->link_config.duplex) 2909 return -EINVAL; 2910 return 0; 2911 } 2912 2913 config.speed = s->speed; 2914 config.duplex = s->duplex; 2915 break; 2916 2917 case AUTONEG_ENABLE: 2918 /* If we have a fixed link, allow autonegotiation (since that 2919 * is our default case) but do not allow the advertisement to 2920 * be changed. If the advertisement matches, simply return. 2921 */ 2922 if (pl->req_link_an_mode == MLO_AN_FIXED) { 2923 if (!linkmode_equal(config.advertising, 2924 pl->link_config.advertising)) 2925 return -EINVAL; 2926 return 0; 2927 } 2928 2929 config.speed = SPEED_UNKNOWN; 2930 config.duplex = DUPLEX_UNKNOWN; 2931 break; 2932 2933 default: 2934 return -EINVAL; 2935 } 2936 2937 /* We have ruled out the case with a PHY attached, and the 2938 * fixed-link cases. All that is left are in-band links. 2939 */ 2940 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising, 2941 kset->base.autoneg == AUTONEG_ENABLE); 2942 2943 /* If this link is with an SFP, ensure that changes to advertised modes 2944 * also cause the associated interface to be selected such that the 2945 * link can be configured correctly. 2946 */ 2947 if (pl->sfp_bus) { 2948 config.interface = phylink_sfp_select_interface(pl, 2949 config.advertising); 2950 if (config.interface == PHY_INTERFACE_MODE_NA) 2951 return -EINVAL; 2952 2953 /* Revalidate with the selected interface */ 2954 linkmode_copy(support, pl->supported); 2955 if (phylink_validate(pl, support, &config)) { 2956 phylink_err(pl, "validation of %s/%s with support %*pb failed\n", 2957 phylink_an_mode_str(pl->req_link_an_mode), 2958 phy_modes(config.interface), 2959 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 2960 return -EINVAL; 2961 } 2962 } else { 2963 /* Validate without changing the current supported mask. */ 2964 linkmode_copy(support, pl->supported); 2965 if (phylink_validate(pl, support, &config)) 2966 return -EINVAL; 2967 } 2968 2969 /* If autonegotiation is enabled, we must have an advertisement */ 2970 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2971 config.advertising) && 2972 phylink_is_empty_linkmode(config.advertising)) 2973 return -EINVAL; 2974 2975 /* Validate the autonegotiation state. We don't have a PHY in this 2976 * situation, so the PCS is the media-facing entity. 2977 */ 2978 if (!phylink_validate_pcs_inband_autoneg(pl, config.interface, 2979 config.advertising)) 2980 return -EINVAL; 2981 2982 mutex_lock(&pl->state_mutex); 2983 pl->link_config.speed = config.speed; 2984 pl->link_config.duplex = config.duplex; 2985 2986 if (pl->link_config.interface != config.interface) { 2987 /* The interface changed, e.g. 1000base-X <-> 2500base-X */ 2988 /* We need to force the link down, then change the interface */ 2989 if (pl->old_link_state) { 2990 phylink_link_down(pl); 2991 pl->old_link_state = false; 2992 } 2993 if (!test_bit(PHYLINK_DISABLE_STOPPED, 2994 &pl->phylink_disable_state)) 2995 phylink_major_config(pl, false, &config); 2996 pl->link_config.interface = config.interface; 2997 linkmode_copy(pl->link_config.advertising, config.advertising); 2998 } else if (!linkmode_equal(pl->link_config.advertising, 2999 config.advertising)) { 3000 linkmode_copy(pl->link_config.advertising, config.advertising); 3001 phylink_change_inband_advert(pl); 3002 } 3003 mutex_unlock(&pl->state_mutex); 3004 3005 return 0; 3006 } 3007 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set); 3008 3009 /** 3010 * phylink_ethtool_nway_reset() - restart negotiation 3011 * @pl: a pointer to a &struct phylink returned from phylink_create() 3012 * 3013 * Restart negotiation for the phylink instance specified by @pl. This will 3014 * cause any attached phy to restart negotiation with the link partner, and 3015 * if the MAC is in a BaseX mode, the MAC will also be requested to restart 3016 * negotiation. 3017 * 3018 * Returns zero on success, or negative error code. 3019 */ 3020 int phylink_ethtool_nway_reset(struct phylink *pl) 3021 { 3022 int ret = 0; 3023 3024 ASSERT_RTNL(); 3025 3026 if (pl->phydev) 3027 ret = phy_restart_aneg(pl->phydev); 3028 phylink_pcs_an_restart(pl); 3029 3030 return ret; 3031 } 3032 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset); 3033 3034 /** 3035 * phylink_ethtool_get_pauseparam() - get the current pause parameters 3036 * @pl: a pointer to a &struct phylink returned from phylink_create() 3037 * @pause: a pointer to a &struct ethtool_pauseparam 3038 */ 3039 void phylink_ethtool_get_pauseparam(struct phylink *pl, 3040 struct ethtool_pauseparam *pause) 3041 { 3042 ASSERT_RTNL(); 3043 3044 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN); 3045 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX); 3046 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX); 3047 } 3048 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam); 3049 3050 /** 3051 * phylink_ethtool_set_pauseparam() - set the current pause parameters 3052 * @pl: a pointer to a &struct phylink returned from phylink_create() 3053 * @pause: a pointer to a &struct ethtool_pauseparam 3054 */ 3055 int phylink_ethtool_set_pauseparam(struct phylink *pl, 3056 struct ethtool_pauseparam *pause) 3057 { 3058 struct phylink_link_state *config = &pl->link_config; 3059 bool manual_changed; 3060 int pause_state; 3061 3062 ASSERT_RTNL(); 3063 3064 if (pl->req_link_an_mode == MLO_AN_FIXED) 3065 return -EOPNOTSUPP; 3066 3067 if (!phylink_test(pl->supported, Pause) && 3068 !phylink_test(pl->supported, Asym_Pause)) 3069 return -EOPNOTSUPP; 3070 3071 if (!phylink_test(pl->supported, Asym_Pause) && 3072 pause->rx_pause != pause->tx_pause) 3073 return -EINVAL; 3074 3075 pause_state = 0; 3076 if (pause->autoneg) 3077 pause_state |= MLO_PAUSE_AN; 3078 if (pause->rx_pause) 3079 pause_state |= MLO_PAUSE_RX; 3080 if (pause->tx_pause) 3081 pause_state |= MLO_PAUSE_TX; 3082 3083 mutex_lock(&pl->state_mutex); 3084 /* 3085 * See the comments for linkmode_set_pause(), wrt the deficiencies 3086 * with the current implementation. A solution to this issue would 3087 * be: 3088 * ethtool Local device 3089 * rx tx Pause AsymDir 3090 * 0 0 0 0 3091 * 1 0 1 1 3092 * 0 1 0 1 3093 * 1 1 1 1 3094 * and then use the ethtool rx/tx enablement status to mask the 3095 * rx/tx pause resolution. 3096 */ 3097 linkmode_set_pause(config->advertising, pause->tx_pause, 3098 pause->rx_pause); 3099 3100 manual_changed = (config->pause ^ pause_state) & MLO_PAUSE_AN || 3101 (!(pause_state & MLO_PAUSE_AN) && 3102 (config->pause ^ pause_state) & MLO_PAUSE_TXRX_MASK); 3103 3104 config->pause = pause_state; 3105 3106 /* Update our in-band advertisement, triggering a renegotiation if 3107 * the advertisement changed. 3108 */ 3109 if (!pl->phydev) 3110 phylink_change_inband_advert(pl); 3111 3112 mutex_unlock(&pl->state_mutex); 3113 3114 /* If we have a PHY, a change of the pause frame advertisement will 3115 * cause phylib to renegotiate (if AN is enabled) which will in turn 3116 * call our phylink_phy_change() and trigger a resolve. Note that 3117 * we can't hold our state mutex while calling phy_set_asym_pause(). 3118 */ 3119 if (pl->phydev) 3120 phy_set_asym_pause(pl->phydev, pause->rx_pause, 3121 pause->tx_pause); 3122 3123 /* If the manual pause settings changed, make sure we trigger a 3124 * resolve to update their state; we can not guarantee that the 3125 * link will cycle. 3126 */ 3127 if (manual_changed) { 3128 pl->link_failed = true; 3129 phylink_run_resolve(pl); 3130 } 3131 3132 return 0; 3133 } 3134 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam); 3135 3136 /** 3137 * phylink_get_eee_err() - read the energy efficient ethernet error 3138 * counter 3139 * @pl: a pointer to a &struct phylink returned from phylink_create(). 3140 * 3141 * Read the Energy Efficient Ethernet error counter from the PHY associated 3142 * with the phylink instance specified by @pl. 3143 * 3144 * Returns positive error counter value, or negative error code. 3145 */ 3146 int phylink_get_eee_err(struct phylink *pl) 3147 { 3148 int ret = 0; 3149 3150 ASSERT_RTNL(); 3151 3152 if (pl->phydev) 3153 ret = phy_get_eee_err(pl->phydev); 3154 3155 return ret; 3156 } 3157 EXPORT_SYMBOL_GPL(phylink_get_eee_err); 3158 3159 /** 3160 * phylink_init_eee() - init and check the EEE features 3161 * @pl: a pointer to a &struct phylink returned from phylink_create() 3162 * @clk_stop_enable: allow PHY to stop receive clock 3163 * 3164 * Must be called either with RTNL held or within mac_link_up() 3165 */ 3166 int phylink_init_eee(struct phylink *pl, bool clk_stop_enable) 3167 { 3168 int ret = -EOPNOTSUPP; 3169 3170 if (pl->phydev) 3171 ret = phy_init_eee(pl->phydev, clk_stop_enable); 3172 3173 return ret; 3174 } 3175 EXPORT_SYMBOL_GPL(phylink_init_eee); 3176 3177 /** 3178 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters 3179 * @pl: a pointer to a &struct phylink returned from phylink_create() 3180 * @eee: a pointer to a &struct ethtool_keee for the read parameters 3181 */ 3182 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_keee *eee) 3183 { 3184 int ret = -EOPNOTSUPP; 3185 3186 ASSERT_RTNL(); 3187 3188 if (pl->mac_supports_eee_ops && !pl->mac_supports_eee) 3189 return ret; 3190 3191 if (pl->phydev) { 3192 ret = phy_ethtool_get_eee(pl->phydev, eee); 3193 /* Restrict supported linkmode mask */ 3194 if (ret == 0 && pl->mac_supports_eee_ops) 3195 linkmode_and(eee->supported, eee->supported, 3196 pl->supported_lpi); 3197 } 3198 3199 return ret; 3200 } 3201 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee); 3202 3203 /** 3204 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters 3205 * @pl: a pointer to a &struct phylink returned from phylink_create() 3206 * @eee: a pointer to a &struct ethtool_keee for the desired parameters 3207 */ 3208 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_keee *eee) 3209 { 3210 bool mac_eee = pl->mac_supports_eee; 3211 int ret = -EOPNOTSUPP; 3212 3213 ASSERT_RTNL(); 3214 3215 phylink_dbg(pl, "mac %s phylink EEE%s, adv %*pbl, LPI%s timer %uus\n", 3216 mac_eee ? "supports" : "does not support", 3217 eee->eee_enabled ? ", enabled" : "", 3218 __ETHTOOL_LINK_MODE_MASK_NBITS, eee->advertised, 3219 eee->tx_lpi_enabled ? " enabled" : "", eee->tx_lpi_timer); 3220 3221 if (pl->mac_supports_eee_ops && !mac_eee) 3222 return ret; 3223 3224 if (pl->phydev) { 3225 /* Restrict advertisement mask */ 3226 if (pl->mac_supports_eee_ops) 3227 linkmode_and(eee->advertised, eee->advertised, 3228 pl->supported_lpi); 3229 ret = phy_ethtool_set_eee(pl->phydev, eee); 3230 if (ret == 0) 3231 eee_to_eeecfg(&pl->eee_cfg, eee); 3232 } 3233 3234 return ret; 3235 } 3236 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee); 3237 3238 /* This emulates MII registers for a fixed-mode phy operating as per the 3239 * passed in state. "aneg" defines if we report negotiation is possible. 3240 * 3241 * FIXME: should deal with negotiation state too. 3242 */ 3243 static int phylink_mii_emul_read(unsigned int reg, 3244 struct phylink_link_state *state) 3245 { 3246 struct fixed_phy_status fs; 3247 unsigned long *lpa = state->lp_advertising; 3248 int val; 3249 3250 fs.link = state->link; 3251 fs.speed = state->speed; 3252 fs.duplex = state->duplex; 3253 fs.pause = test_bit(ETHTOOL_LINK_MODE_Pause_BIT, lpa); 3254 fs.asym_pause = test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, lpa); 3255 3256 val = swphy_read_reg(reg, &fs); 3257 if (reg == MII_BMSR) { 3258 if (!state->an_complete) 3259 val &= ~BMSR_ANEGCOMPLETE; 3260 } 3261 return val; 3262 } 3263 3264 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id, 3265 unsigned int reg) 3266 { 3267 struct phy_device *phydev = pl->phydev; 3268 int prtad, devad; 3269 3270 if (mdio_phy_id_is_c45(phy_id)) { 3271 prtad = mdio_phy_id_prtad(phy_id); 3272 devad = mdio_phy_id_devad(phy_id); 3273 return mdiobus_c45_read(pl->phydev->mdio.bus, prtad, devad, 3274 reg); 3275 } 3276 3277 if (phydev->is_c45) { 3278 switch (reg) { 3279 case MII_BMCR: 3280 case MII_BMSR: 3281 case MII_PHYSID1: 3282 case MII_PHYSID2: 3283 devad = __ffs(phydev->c45_ids.mmds_present); 3284 break; 3285 case MII_ADVERTISE: 3286 case MII_LPA: 3287 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 3288 return -EINVAL; 3289 devad = MDIO_MMD_AN; 3290 if (reg == MII_ADVERTISE) 3291 reg = MDIO_AN_ADVERTISE; 3292 else 3293 reg = MDIO_AN_LPA; 3294 break; 3295 default: 3296 return -EINVAL; 3297 } 3298 prtad = phy_id; 3299 return mdiobus_c45_read(pl->phydev->mdio.bus, prtad, devad, 3300 reg); 3301 } 3302 3303 return mdiobus_read(pl->phydev->mdio.bus, phy_id, reg); 3304 } 3305 3306 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id, 3307 unsigned int reg, unsigned int val) 3308 { 3309 struct phy_device *phydev = pl->phydev; 3310 int prtad, devad; 3311 3312 if (mdio_phy_id_is_c45(phy_id)) { 3313 prtad = mdio_phy_id_prtad(phy_id); 3314 devad = mdio_phy_id_devad(phy_id); 3315 return mdiobus_c45_write(pl->phydev->mdio.bus, prtad, devad, 3316 reg, val); 3317 } 3318 3319 if (phydev->is_c45) { 3320 switch (reg) { 3321 case MII_BMCR: 3322 case MII_BMSR: 3323 case MII_PHYSID1: 3324 case MII_PHYSID2: 3325 devad = __ffs(phydev->c45_ids.mmds_present); 3326 break; 3327 case MII_ADVERTISE: 3328 case MII_LPA: 3329 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN)) 3330 return -EINVAL; 3331 devad = MDIO_MMD_AN; 3332 if (reg == MII_ADVERTISE) 3333 reg = MDIO_AN_ADVERTISE; 3334 else 3335 reg = MDIO_AN_LPA; 3336 break; 3337 default: 3338 return -EINVAL; 3339 } 3340 return mdiobus_c45_write(pl->phydev->mdio.bus, phy_id, devad, 3341 reg, val); 3342 } 3343 3344 return mdiobus_write(phydev->mdio.bus, phy_id, reg, val); 3345 } 3346 3347 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id, 3348 unsigned int reg) 3349 { 3350 struct phylink_link_state state; 3351 int val = 0xffff; 3352 3353 switch (pl->act_link_an_mode) { 3354 case MLO_AN_FIXED: 3355 if (phy_id == 0) { 3356 phylink_get_fixed_state(pl, &state); 3357 val = phylink_mii_emul_read(reg, &state); 3358 } 3359 break; 3360 3361 case MLO_AN_PHY: 3362 return -EOPNOTSUPP; 3363 3364 case MLO_AN_INBAND: 3365 if (phy_id == 0) { 3366 phylink_mac_pcs_get_state(pl, &state); 3367 val = phylink_mii_emul_read(reg, &state); 3368 } 3369 break; 3370 } 3371 3372 return val & 0xffff; 3373 } 3374 3375 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id, 3376 unsigned int reg, unsigned int val) 3377 { 3378 switch (pl->act_link_an_mode) { 3379 case MLO_AN_FIXED: 3380 break; 3381 3382 case MLO_AN_PHY: 3383 return -EOPNOTSUPP; 3384 3385 case MLO_AN_INBAND: 3386 break; 3387 } 3388 3389 return 0; 3390 } 3391 3392 /** 3393 * phylink_mii_ioctl() - generic mii ioctl interface 3394 * @pl: a pointer to a &struct phylink returned from phylink_create() 3395 * @ifr: a pointer to a &struct ifreq for socket ioctls 3396 * @cmd: ioctl cmd to execute 3397 * 3398 * Perform the specified MII ioctl on the PHY attached to the phylink instance 3399 * specified by @pl. If no PHY is attached, emulate the presence of the PHY. 3400 * 3401 * Returns: zero on success or negative error code. 3402 * 3403 * %SIOCGMIIPHY: 3404 * read register from the current PHY. 3405 * %SIOCGMIIREG: 3406 * read register from the specified PHY. 3407 * %SIOCSMIIREG: 3408 * set a register on the specified PHY. 3409 */ 3410 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd) 3411 { 3412 struct mii_ioctl_data *mii = if_mii(ifr); 3413 int ret; 3414 3415 ASSERT_RTNL(); 3416 3417 if (pl->phydev) { 3418 /* PHYs only exist for MLO_AN_PHY and SGMII */ 3419 switch (cmd) { 3420 case SIOCGMIIPHY: 3421 mii->phy_id = pl->phydev->mdio.addr; 3422 fallthrough; 3423 3424 case SIOCGMIIREG: 3425 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num); 3426 if (ret >= 0) { 3427 mii->val_out = ret; 3428 ret = 0; 3429 } 3430 break; 3431 3432 case SIOCSMIIREG: 3433 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num, 3434 mii->val_in); 3435 break; 3436 3437 default: 3438 ret = phy_mii_ioctl(pl->phydev, ifr, cmd); 3439 break; 3440 } 3441 } else { 3442 switch (cmd) { 3443 case SIOCGMIIPHY: 3444 mii->phy_id = 0; 3445 fallthrough; 3446 3447 case SIOCGMIIREG: 3448 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num); 3449 if (ret >= 0) { 3450 mii->val_out = ret; 3451 ret = 0; 3452 } 3453 break; 3454 3455 case SIOCSMIIREG: 3456 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num, 3457 mii->val_in); 3458 break; 3459 3460 default: 3461 ret = -EOPNOTSUPP; 3462 break; 3463 } 3464 } 3465 3466 return ret; 3467 } 3468 EXPORT_SYMBOL_GPL(phylink_mii_ioctl); 3469 3470 /** 3471 * phylink_speed_down() - set the non-SFP PHY to lowest speed supported by both 3472 * link partners 3473 * @pl: a pointer to a &struct phylink returned from phylink_create() 3474 * @sync: perform action synchronously 3475 * 3476 * If we have a PHY that is not part of a SFP module, then set the speed 3477 * as described in the phy_speed_down() function. Please see this function 3478 * for a description of the @sync parameter. 3479 * 3480 * Returns zero if there is no PHY, otherwise as per phy_speed_down(). 3481 */ 3482 int phylink_speed_down(struct phylink *pl, bool sync) 3483 { 3484 int ret = 0; 3485 3486 ASSERT_RTNL(); 3487 3488 if (!pl->sfp_bus && pl->phydev) 3489 ret = phy_speed_down(pl->phydev, sync); 3490 3491 return ret; 3492 } 3493 EXPORT_SYMBOL_GPL(phylink_speed_down); 3494 3495 /** 3496 * phylink_speed_up() - restore the advertised speeds prior to the call to 3497 * phylink_speed_down() 3498 * @pl: a pointer to a &struct phylink returned from phylink_create() 3499 * 3500 * If we have a PHY that is not part of a SFP module, then restore the 3501 * PHY speeds as per phy_speed_up(). 3502 * 3503 * Returns zero if there is no PHY, otherwise as per phy_speed_up(). 3504 */ 3505 int phylink_speed_up(struct phylink *pl) 3506 { 3507 int ret = 0; 3508 3509 ASSERT_RTNL(); 3510 3511 if (!pl->sfp_bus && pl->phydev) 3512 ret = phy_speed_up(pl->phydev); 3513 3514 return ret; 3515 } 3516 EXPORT_SYMBOL_GPL(phylink_speed_up); 3517 3518 static void phylink_sfp_attach(void *upstream, struct sfp_bus *bus) 3519 { 3520 struct phylink *pl = upstream; 3521 3522 pl->netdev->sfp_bus = bus; 3523 } 3524 3525 static void phylink_sfp_detach(void *upstream, struct sfp_bus *bus) 3526 { 3527 struct phylink *pl = upstream; 3528 3529 pl->netdev->sfp_bus = NULL; 3530 } 3531 3532 static phy_interface_t phylink_choose_sfp_interface(struct phylink *pl, 3533 const unsigned long *intf) 3534 { 3535 phy_interface_t interface; 3536 size_t i; 3537 3538 interface = PHY_INTERFACE_MODE_NA; 3539 for (i = 0; i < ARRAY_SIZE(phylink_sfp_interface_preference); i++) 3540 if (test_bit(phylink_sfp_interface_preference[i], intf)) { 3541 interface = phylink_sfp_interface_preference[i]; 3542 break; 3543 } 3544 3545 return interface; 3546 } 3547 3548 static void phylink_sfp_set_config(struct phylink *pl, unsigned long *supported, 3549 struct phylink_link_state *state, 3550 bool changed) 3551 { 3552 u8 mode = MLO_AN_INBAND; 3553 3554 phylink_dbg(pl, "requesting link mode %s/%s with support %*pb\n", 3555 phylink_an_mode_str(mode), phy_modes(state->interface), 3556 __ETHTOOL_LINK_MODE_MASK_NBITS, supported); 3557 3558 if (!linkmode_equal(pl->supported, supported)) { 3559 linkmode_copy(pl->supported, supported); 3560 changed = true; 3561 } 3562 3563 if (!linkmode_equal(pl->link_config.advertising, state->advertising)) { 3564 linkmode_copy(pl->link_config.advertising, state->advertising); 3565 changed = true; 3566 } 3567 3568 if (pl->req_link_an_mode != mode || 3569 pl->link_config.interface != state->interface) { 3570 pl->req_link_an_mode = mode; 3571 pl->link_config.interface = state->interface; 3572 3573 changed = true; 3574 3575 phylink_info(pl, "switched to %s/%s link mode\n", 3576 phylink_an_mode_str(mode), 3577 phy_modes(state->interface)); 3578 } 3579 3580 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED, 3581 &pl->phylink_disable_state)) 3582 phylink_mac_initial_config(pl, false); 3583 } 3584 3585 static int phylink_sfp_config_phy(struct phylink *pl, struct phy_device *phy) 3586 { 3587 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 3588 struct phylink_link_state config; 3589 int ret; 3590 3591 linkmode_copy(support, phy->supported); 3592 3593 memset(&config, 0, sizeof(config)); 3594 linkmode_copy(config.advertising, phy->advertising); 3595 config.interface = PHY_INTERFACE_MODE_NA; 3596 config.speed = SPEED_UNKNOWN; 3597 config.duplex = DUPLEX_UNKNOWN; 3598 config.pause = MLO_PAUSE_AN; 3599 3600 /* Ignore errors if we're expecting a PHY to attach later */ 3601 ret = phylink_validate(pl, support, &config); 3602 if (ret) { 3603 phylink_err(pl, "validation with support %*pb failed: %pe\n", 3604 __ETHTOOL_LINK_MODE_MASK_NBITS, support, 3605 ERR_PTR(ret)); 3606 return ret; 3607 } 3608 3609 config.interface = phylink_sfp_select_interface(pl, config.advertising); 3610 if (config.interface == PHY_INTERFACE_MODE_NA) 3611 return -EINVAL; 3612 3613 /* Attach the PHY so that the PHY is present when we do the major 3614 * configuration step. 3615 */ 3616 ret = phylink_attach_phy(pl, phy, config.interface); 3617 if (ret < 0) 3618 return ret; 3619 3620 /* This will validate the configuration for us. */ 3621 ret = phylink_bringup_phy(pl, phy, config.interface); 3622 if (ret < 0) { 3623 phy_detach(phy); 3624 return ret; 3625 } 3626 3627 pl->link_port = pl->sfp_port; 3628 3629 phylink_sfp_set_config(pl, support, &config, true); 3630 3631 return 0; 3632 } 3633 3634 static int phylink_sfp_config_optical(struct phylink *pl) 3635 { 3636 __ETHTOOL_DECLARE_LINK_MODE_MASK(support); 3637 DECLARE_PHY_INTERFACE_MASK(interfaces); 3638 struct phylink_link_state config; 3639 phy_interface_t interface; 3640 int ret; 3641 3642 phylink_dbg(pl, "optical SFP: interfaces=[mac=%*pbl, sfp=%*pbl]\n", 3643 (int)PHY_INTERFACE_MODE_MAX, 3644 pl->config->supported_interfaces, 3645 (int)PHY_INTERFACE_MODE_MAX, 3646 pl->sfp_interfaces); 3647 3648 /* Find the union of the supported interfaces by the PCS/MAC and 3649 * the SFP module. 3650 */ 3651 phy_interface_and(interfaces, pl->config->supported_interfaces, 3652 pl->sfp_interfaces); 3653 if (phy_interface_empty(interfaces)) { 3654 phylink_err(pl, "unsupported SFP module: no common interface modes\n"); 3655 return -EINVAL; 3656 } 3657 3658 memset(&config, 0, sizeof(config)); 3659 linkmode_copy(support, pl->sfp_support); 3660 linkmode_copy(config.advertising, pl->sfp_support); 3661 config.speed = SPEED_UNKNOWN; 3662 config.duplex = DUPLEX_UNKNOWN; 3663 config.pause = MLO_PAUSE_AN; 3664 3665 /* For all the interfaces that are supported, reduce the sfp_support 3666 * mask to only those link modes that can be supported. 3667 */ 3668 ret = phylink_validate_mask(pl, NULL, pl->sfp_support, &config, 3669 interfaces); 3670 if (ret) { 3671 phylink_err(pl, "unsupported SFP module: validation with support %*pb failed\n", 3672 __ETHTOOL_LINK_MODE_MASK_NBITS, support); 3673 return ret; 3674 } 3675 3676 interface = phylink_choose_sfp_interface(pl, interfaces); 3677 if (interface == PHY_INTERFACE_MODE_NA) { 3678 phylink_err(pl, "failed to select SFP interface\n"); 3679 return -EINVAL; 3680 } 3681 3682 phylink_dbg(pl, "optical SFP: chosen %s interface\n", 3683 phy_modes(interface)); 3684 3685 if (!phylink_validate_pcs_inband_autoneg(pl, interface, 3686 config.advertising)) { 3687 phylink_err(pl, "autoneg setting not compatible with PCS"); 3688 return -EINVAL; 3689 } 3690 3691 config.interface = interface; 3692 3693 /* Ignore errors if we're expecting a PHY to attach later */ 3694 ret = phylink_validate(pl, support, &config); 3695 if (ret) { 3696 phylink_err(pl, "validation with support %*pb failed: %pe\n", 3697 __ETHTOOL_LINK_MODE_MASK_NBITS, support, 3698 ERR_PTR(ret)); 3699 return ret; 3700 } 3701 3702 pl->link_port = pl->sfp_port; 3703 3704 phylink_sfp_set_config(pl, pl->sfp_support, &config, false); 3705 3706 return 0; 3707 } 3708 3709 static int phylink_sfp_module_insert(void *upstream, 3710 const struct sfp_eeprom_id *id) 3711 { 3712 struct phylink *pl = upstream; 3713 3714 ASSERT_RTNL(); 3715 3716 linkmode_zero(pl->sfp_support); 3717 phy_interface_zero(pl->sfp_interfaces); 3718 sfp_parse_support(pl->sfp_bus, id, pl->sfp_support, pl->sfp_interfaces); 3719 pl->sfp_port = sfp_parse_port(pl->sfp_bus, id, pl->sfp_support); 3720 3721 /* If this module may have a PHY connecting later, defer until later */ 3722 pl->sfp_may_have_phy = sfp_may_have_phy(pl->sfp_bus, id); 3723 if (pl->sfp_may_have_phy) 3724 return 0; 3725 3726 return phylink_sfp_config_optical(pl); 3727 } 3728 3729 static int phylink_sfp_module_start(void *upstream) 3730 { 3731 struct phylink *pl = upstream; 3732 3733 /* If this SFP module has a PHY, start the PHY now. */ 3734 if (pl->phydev) { 3735 phy_start(pl->phydev); 3736 return 0; 3737 } 3738 3739 /* If the module may have a PHY but we didn't detect one we 3740 * need to configure the MAC here. 3741 */ 3742 if (!pl->sfp_may_have_phy) 3743 return 0; 3744 3745 return phylink_sfp_config_optical(pl); 3746 } 3747 3748 static void phylink_sfp_module_stop(void *upstream) 3749 { 3750 struct phylink *pl = upstream; 3751 3752 /* If this SFP module has a PHY, stop it. */ 3753 if (pl->phydev) 3754 phy_stop(pl->phydev); 3755 } 3756 3757 static void phylink_sfp_link_down(void *upstream) 3758 { 3759 struct phylink *pl = upstream; 3760 3761 ASSERT_RTNL(); 3762 3763 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_LINK); 3764 } 3765 3766 static void phylink_sfp_link_up(void *upstream) 3767 { 3768 struct phylink *pl = upstream; 3769 3770 ASSERT_RTNL(); 3771 3772 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_LINK); 3773 } 3774 3775 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy) 3776 { 3777 struct phylink *pl = upstream; 3778 3779 if (!phy->drv) { 3780 phylink_err(pl, "PHY %s (id 0x%.8lx) has no driver loaded\n", 3781 phydev_name(phy), (unsigned long)phy->phy_id); 3782 phylink_err(pl, "Drivers which handle known common cases: CONFIG_BCM84881_PHY, CONFIG_MARVELL_PHY\n"); 3783 return -EINVAL; 3784 } 3785 3786 /* 3787 * This is the new way of dealing with flow control for PHYs, 3788 * as described by Timur Tabi in commit 529ed1275263 ("net: phy: 3789 * phy drivers should not set SUPPORTED_[Asym_]Pause") except 3790 * using our validate call to the MAC, we rely upon the MAC 3791 * clearing the bits from both supported and advertising fields. 3792 */ 3793 phy_support_asym_pause(phy); 3794 3795 /* Set the PHY's host supported interfaces */ 3796 phy_interface_and(phy->host_interfaces, phylink_sfp_interfaces, 3797 pl->config->supported_interfaces); 3798 3799 /* Do the initial configuration */ 3800 return phylink_sfp_config_phy(pl, phy); 3801 } 3802 3803 static void phylink_sfp_disconnect_phy(void *upstream, 3804 struct phy_device *phydev) 3805 { 3806 phylink_disconnect_phy(upstream); 3807 } 3808 3809 static const struct sfp_upstream_ops sfp_phylink_ops = { 3810 .attach = phylink_sfp_attach, 3811 .detach = phylink_sfp_detach, 3812 .module_insert = phylink_sfp_module_insert, 3813 .module_start = phylink_sfp_module_start, 3814 .module_stop = phylink_sfp_module_stop, 3815 .link_up = phylink_sfp_link_up, 3816 .link_down = phylink_sfp_link_down, 3817 .connect_phy = phylink_sfp_connect_phy, 3818 .disconnect_phy = phylink_sfp_disconnect_phy, 3819 }; 3820 3821 /* Helpers for MAC drivers */ 3822 3823 static struct { 3824 int bit; 3825 int speed; 3826 } phylink_c73_priority_resolution[] = { 3827 { ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT, SPEED_100000 }, 3828 { ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT, SPEED_100000 }, 3829 /* 100GBASE-KP4 and 100GBASE-CR10 not supported */ 3830 { ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT, SPEED_40000 }, 3831 { ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT, SPEED_40000 }, 3832 { ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, SPEED_10000 }, 3833 { ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, SPEED_10000 }, 3834 /* 5GBASE-KR not supported */ 3835 { ETHTOOL_LINK_MODE_2500baseX_Full_BIT, SPEED_2500 }, 3836 { ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, SPEED_1000 }, 3837 }; 3838 3839 void phylink_resolve_c73(struct phylink_link_state *state) 3840 { 3841 int i; 3842 3843 for (i = 0; i < ARRAY_SIZE(phylink_c73_priority_resolution); i++) { 3844 int bit = phylink_c73_priority_resolution[i].bit; 3845 if (linkmode_test_bit(bit, state->advertising) && 3846 linkmode_test_bit(bit, state->lp_advertising)) 3847 break; 3848 } 3849 3850 if (i < ARRAY_SIZE(phylink_c73_priority_resolution)) { 3851 state->speed = phylink_c73_priority_resolution[i].speed; 3852 state->duplex = DUPLEX_FULL; 3853 } else { 3854 /* negotiation failure */ 3855 state->link = false; 3856 } 3857 3858 phylink_resolve_an_pause(state); 3859 } 3860 EXPORT_SYMBOL_GPL(phylink_resolve_c73); 3861 3862 static void phylink_decode_c37_word(struct phylink_link_state *state, 3863 uint16_t config_reg, int speed) 3864 { 3865 int fd_bit; 3866 3867 if (speed == SPEED_2500) 3868 fd_bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT; 3869 else 3870 fd_bit = ETHTOOL_LINK_MODE_1000baseX_Full_BIT; 3871 3872 mii_lpa_mod_linkmode_x(state->lp_advertising, config_reg, fd_bit); 3873 3874 if (linkmode_test_bit(fd_bit, state->advertising) && 3875 linkmode_test_bit(fd_bit, state->lp_advertising)) { 3876 state->speed = speed; 3877 state->duplex = DUPLEX_FULL; 3878 } else { 3879 /* negotiation failure */ 3880 state->link = false; 3881 } 3882 3883 phylink_resolve_an_pause(state); 3884 } 3885 3886 static void phylink_decode_sgmii_word(struct phylink_link_state *state, 3887 uint16_t config_reg) 3888 { 3889 if (!(config_reg & LPA_SGMII_LINK)) { 3890 state->link = false; 3891 return; 3892 } 3893 3894 switch (config_reg & LPA_SGMII_SPD_MASK) { 3895 case LPA_SGMII_10: 3896 state->speed = SPEED_10; 3897 break; 3898 case LPA_SGMII_100: 3899 state->speed = SPEED_100; 3900 break; 3901 case LPA_SGMII_1000: 3902 state->speed = SPEED_1000; 3903 break; 3904 default: 3905 state->link = false; 3906 return; 3907 } 3908 if (config_reg & LPA_SGMII_FULL_DUPLEX) 3909 state->duplex = DUPLEX_FULL; 3910 else 3911 state->duplex = DUPLEX_HALF; 3912 } 3913 3914 /** 3915 * phylink_decode_usxgmii_word() - decode the USXGMII word from a MAC PCS 3916 * @state: a pointer to a struct phylink_link_state. 3917 * @lpa: a 16 bit value which stores the USXGMII auto-negotiation word 3918 * 3919 * Helper for MAC PCS supporting the USXGMII protocol and the auto-negotiation 3920 * code word. Decode the USXGMII code word and populate the corresponding fields 3921 * (speed, duplex) into the phylink_link_state structure. 3922 */ 3923 void phylink_decode_usxgmii_word(struct phylink_link_state *state, 3924 uint16_t lpa) 3925 { 3926 switch (lpa & MDIO_USXGMII_SPD_MASK) { 3927 case MDIO_USXGMII_10: 3928 state->speed = SPEED_10; 3929 break; 3930 case MDIO_USXGMII_100: 3931 state->speed = SPEED_100; 3932 break; 3933 case MDIO_USXGMII_1000: 3934 state->speed = SPEED_1000; 3935 break; 3936 case MDIO_USXGMII_2500: 3937 state->speed = SPEED_2500; 3938 break; 3939 case MDIO_USXGMII_5000: 3940 state->speed = SPEED_5000; 3941 break; 3942 case MDIO_USXGMII_10G: 3943 state->speed = SPEED_10000; 3944 break; 3945 default: 3946 state->link = false; 3947 return; 3948 } 3949 3950 if (lpa & MDIO_USXGMII_FULL_DUPLEX) 3951 state->duplex = DUPLEX_FULL; 3952 else 3953 state->duplex = DUPLEX_HALF; 3954 } 3955 EXPORT_SYMBOL_GPL(phylink_decode_usxgmii_word); 3956 3957 /** 3958 * phylink_decode_usgmii_word() - decode the USGMII word from a MAC PCS 3959 * @state: a pointer to a struct phylink_link_state. 3960 * @lpa: a 16 bit value which stores the USGMII auto-negotiation word 3961 * 3962 * Helper for MAC PCS supporting the USGMII protocol and the auto-negotiation 3963 * code word. Decode the USGMII code word and populate the corresponding fields 3964 * (speed, duplex) into the phylink_link_state structure. The structure for this 3965 * word is the same as the USXGMII word, except it only supports speeds up to 3966 * 1Gbps. 3967 */ 3968 static void phylink_decode_usgmii_word(struct phylink_link_state *state, 3969 uint16_t lpa) 3970 { 3971 switch (lpa & MDIO_USXGMII_SPD_MASK) { 3972 case MDIO_USXGMII_10: 3973 state->speed = SPEED_10; 3974 break; 3975 case MDIO_USXGMII_100: 3976 state->speed = SPEED_100; 3977 break; 3978 case MDIO_USXGMII_1000: 3979 state->speed = SPEED_1000; 3980 break; 3981 default: 3982 state->link = false; 3983 return; 3984 } 3985 3986 if (lpa & MDIO_USXGMII_FULL_DUPLEX) 3987 state->duplex = DUPLEX_FULL; 3988 else 3989 state->duplex = DUPLEX_HALF; 3990 } 3991 3992 /** 3993 * phylink_mii_c22_pcs_decode_state() - Decode MAC PCS state from MII registers 3994 * @state: a pointer to a &struct phylink_link_state. 3995 * @neg_mode: link negotiation mode (PHYLINK_PCS_NEG_xxx) 3996 * @bmsr: The value of the %MII_BMSR register 3997 * @lpa: The value of the %MII_LPA register 3998 * 3999 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 4000 * clause 37 negotiation and/or SGMII control. 4001 * 4002 * Parse the Clause 37 or Cisco SGMII link partner negotiation word into 4003 * the phylink @state structure. This is suitable to be used for implementing 4004 * the pcs_get_state() member of the struct phylink_pcs_ops structure if 4005 * accessing @bmsr and @lpa cannot be done with MDIO directly. 4006 */ 4007 void phylink_mii_c22_pcs_decode_state(struct phylink_link_state *state, 4008 unsigned int neg_mode, u16 bmsr, u16 lpa) 4009 { 4010 state->link = !!(bmsr & BMSR_LSTATUS); 4011 state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE); 4012 4013 /* If the link is down, the advertisement data is undefined. */ 4014 if (!state->link) 4015 return; 4016 4017 switch (state->interface) { 4018 case PHY_INTERFACE_MODE_1000BASEX: 4019 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) { 4020 phylink_decode_c37_word(state, lpa, SPEED_1000); 4021 } else { 4022 state->speed = SPEED_1000; 4023 state->duplex = DUPLEX_FULL; 4024 state->pause |= MLO_PAUSE_TX | MLO_PAUSE_RX; 4025 } 4026 break; 4027 4028 case PHY_INTERFACE_MODE_2500BASEX: 4029 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) { 4030 phylink_decode_c37_word(state, lpa, SPEED_2500); 4031 } else { 4032 state->speed = SPEED_2500; 4033 state->duplex = DUPLEX_FULL; 4034 state->pause |= MLO_PAUSE_TX | MLO_PAUSE_RX; 4035 } 4036 break; 4037 4038 case PHY_INTERFACE_MODE_SGMII: 4039 case PHY_INTERFACE_MODE_QSGMII: 4040 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) 4041 phylink_decode_sgmii_word(state, lpa); 4042 break; 4043 4044 case PHY_INTERFACE_MODE_QUSGMII: 4045 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) 4046 phylink_decode_usgmii_word(state, lpa); 4047 break; 4048 4049 default: 4050 state->link = false; 4051 break; 4052 } 4053 } 4054 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_decode_state); 4055 4056 /** 4057 * phylink_mii_c22_pcs_get_state() - read the MAC PCS state 4058 * @pcs: a pointer to a &struct mdio_device. 4059 * @neg_mode: link negotiation mode (PHYLINK_PCS_NEG_xxx) 4060 * @state: a pointer to a &struct phylink_link_state. 4061 * 4062 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 4063 * clause 37 negotiation and/or SGMII control. 4064 * 4065 * Read the MAC PCS state from the MII device configured in @config and 4066 * parse the Clause 37 or Cisco SGMII link partner negotiation word into 4067 * the phylink @state structure. This is suitable to be directly plugged 4068 * into the pcs_get_state() member of the struct phylink_pcs_ops 4069 * structure. 4070 */ 4071 void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs, 4072 unsigned int neg_mode, 4073 struct phylink_link_state *state) 4074 { 4075 int bmsr, lpa; 4076 4077 bmsr = mdiodev_read(pcs, MII_BMSR); 4078 lpa = mdiodev_read(pcs, MII_LPA); 4079 if (bmsr < 0 || lpa < 0) { 4080 state->link = false; 4081 return; 4082 } 4083 4084 phylink_mii_c22_pcs_decode_state(state, neg_mode, bmsr, lpa); 4085 } 4086 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_get_state); 4087 4088 /** 4089 * phylink_mii_c22_pcs_encode_advertisement() - configure the clause 37 PCS 4090 * advertisement 4091 * @interface: the PHY interface mode being configured 4092 * @advertising: the ethtool advertisement mask 4093 * 4094 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 4095 * clause 37 negotiation and/or SGMII control. 4096 * 4097 * Encode the clause 37 PCS advertisement as specified by @interface and 4098 * @advertising. 4099 * 4100 * Return: The new value for @adv, or ``-EINVAL`` if it should not be changed. 4101 */ 4102 int phylink_mii_c22_pcs_encode_advertisement(phy_interface_t interface, 4103 const unsigned long *advertising) 4104 { 4105 u16 adv; 4106 4107 switch (interface) { 4108 case PHY_INTERFACE_MODE_1000BASEX: 4109 case PHY_INTERFACE_MODE_2500BASEX: 4110 adv = ADVERTISE_1000XFULL; 4111 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 4112 advertising)) 4113 adv |= ADVERTISE_1000XPAUSE; 4114 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 4115 advertising)) 4116 adv |= ADVERTISE_1000XPSE_ASYM; 4117 return adv; 4118 case PHY_INTERFACE_MODE_SGMII: 4119 case PHY_INTERFACE_MODE_QSGMII: 4120 return 0x0001; 4121 default: 4122 /* Nothing to do for other modes */ 4123 return -EINVAL; 4124 } 4125 } 4126 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_encode_advertisement); 4127 4128 /** 4129 * phylink_mii_c22_pcs_config() - configure clause 22 PCS 4130 * @pcs: a pointer to a &struct mdio_device. 4131 * @interface: the PHY interface mode being configured 4132 * @advertising: the ethtool advertisement mask 4133 * @neg_mode: PCS negotiation mode 4134 * 4135 * Configure a Clause 22 PCS PHY with the appropriate negotiation 4136 * parameters for the @mode, @interface and @advertising parameters. 4137 * Returns negative error number on failure, zero if the advertisement 4138 * has not changed, or positive if there is a change. 4139 */ 4140 int phylink_mii_c22_pcs_config(struct mdio_device *pcs, 4141 phy_interface_t interface, 4142 const unsigned long *advertising, 4143 unsigned int neg_mode) 4144 { 4145 bool changed = 0; 4146 u16 bmcr; 4147 int ret, adv; 4148 4149 adv = phylink_mii_c22_pcs_encode_advertisement(interface, advertising); 4150 if (adv >= 0) { 4151 ret = mdiobus_modify_changed(pcs->bus, pcs->addr, 4152 MII_ADVERTISE, 0xffff, adv); 4153 if (ret < 0) 4154 return ret; 4155 changed = ret; 4156 } 4157 4158 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) 4159 bmcr = BMCR_ANENABLE; 4160 else 4161 bmcr = 0; 4162 4163 /* Configure the inband state. Ensure ISOLATE bit is disabled */ 4164 ret = mdiodev_modify(pcs, MII_BMCR, BMCR_ANENABLE | BMCR_ISOLATE, bmcr); 4165 if (ret < 0) 4166 return ret; 4167 4168 return changed; 4169 } 4170 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config); 4171 4172 /** 4173 * phylink_mii_c22_pcs_an_restart() - restart 802.3z autonegotiation 4174 * @pcs: a pointer to a &struct mdio_device. 4175 * 4176 * Helper for MAC PCS supporting the 802.3 clause 22 register set for 4177 * clause 37 negotiation. 4178 * 4179 * Restart the clause 37 negotiation with the link partner. This is 4180 * suitable to be directly plugged into the pcs_get_state() member 4181 * of the struct phylink_pcs_ops structure. 4182 */ 4183 void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs) 4184 { 4185 int val = mdiodev_read(pcs, MII_BMCR); 4186 4187 if (val >= 0) { 4188 val |= BMCR_ANRESTART; 4189 4190 mdiodev_write(pcs, MII_BMCR, val); 4191 } 4192 } 4193 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_an_restart); 4194 4195 void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs, 4196 struct phylink_link_state *state) 4197 { 4198 struct mii_bus *bus = pcs->bus; 4199 int addr = pcs->addr; 4200 int stat; 4201 4202 stat = mdiobus_c45_read(bus, addr, MDIO_MMD_PCS, MDIO_STAT1); 4203 if (stat < 0) { 4204 state->link = false; 4205 return; 4206 } 4207 4208 state->link = !!(stat & MDIO_STAT1_LSTATUS); 4209 if (!state->link) 4210 return; 4211 4212 switch (state->interface) { 4213 case PHY_INTERFACE_MODE_10GBASER: 4214 state->speed = SPEED_10000; 4215 state->duplex = DUPLEX_FULL; 4216 break; 4217 4218 default: 4219 break; 4220 } 4221 } 4222 EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state); 4223 4224 static int __init phylink_init(void) 4225 { 4226 for (int i = 0; i < ARRAY_SIZE(phylink_sfp_interface_preference); ++i) 4227 __set_bit(phylink_sfp_interface_preference[i], 4228 phylink_sfp_interfaces); 4229 4230 return 0; 4231 } 4232 4233 module_init(phylink_init); 4234 4235 MODULE_LICENSE("GPL v2"); 4236 MODULE_DESCRIPTION("phylink models the MAC to optional PHY connection"); 4237