1 #ifndef NETDEV_PCS_H 2 #define NETDEV_PCS_H 3 4 #include <linux/phy.h> 5 #include <linux/spinlock.h> 6 #include <linux/workqueue.h> 7 8 #include <net/eee.h> 9 10 struct device_node; 11 struct ethtool_cmd; 12 struct fwnode_handle; 13 struct net_device; 14 struct phylink; 15 16 enum { 17 MLO_PAUSE_NONE, 18 MLO_PAUSE_RX = BIT(0), 19 MLO_PAUSE_TX = BIT(1), 20 MLO_PAUSE_TXRX_MASK = MLO_PAUSE_TX | MLO_PAUSE_RX, 21 MLO_PAUSE_AN = BIT(2), 22 23 MLO_AN_PHY = 0, /* Conventional PHY */ 24 MLO_AN_FIXED, /* Fixed-link mode */ 25 MLO_AN_INBAND, /* In-band protocol */ 26 27 /* PCS "negotiation" mode. 28 * PHYLINK_PCS_NEG_NONE - protocol has no inband capability 29 * PHYLINK_PCS_NEG_OUTBAND - some out of band or fixed link setting 30 * PHYLINK_PCS_NEG_INBAND_DISABLED - inband mode disabled, e.g. 31 * 1000base-X with autoneg off 32 * PHYLINK_PCS_NEG_INBAND_ENABLED - inband mode enabled 33 * Additionally, this can be tested using bitmasks: 34 * PHYLINK_PCS_NEG_INBAND - inband mode selected 35 * PHYLINK_PCS_NEG_ENABLED - negotiation mode enabled 36 */ 37 PHYLINK_PCS_NEG_NONE = 0, 38 PHYLINK_PCS_NEG_ENABLED = BIT(4), 39 PHYLINK_PCS_NEG_OUTBAND = BIT(5), 40 PHYLINK_PCS_NEG_INBAND = BIT(6), 41 PHYLINK_PCS_NEG_INBAND_DISABLED = PHYLINK_PCS_NEG_INBAND, 42 PHYLINK_PCS_NEG_INBAND_ENABLED = PHYLINK_PCS_NEG_INBAND | 43 PHYLINK_PCS_NEG_ENABLED, 44 45 /* MAC_SYM_PAUSE and MAC_ASYM_PAUSE are used when configuring our 46 * autonegotiation advertisement. They correspond to the PAUSE and 47 * ASM_DIR bits defined by 802.3, respectively. 48 * 49 * The following table lists the values of tx_pause and rx_pause which 50 * might be requested in mac_link_up. The exact values depend on either 51 * the results of autonegotation (if MLO_PAUSE_AN is set) or user 52 * configuration (if MLO_PAUSE_AN is not set). 53 * 54 * MAC_SYM_PAUSE MAC_ASYM_PAUSE MLO_PAUSE_AN tx_pause/rx_pause 55 * ============= ============== ============ ================== 56 * 0 0 0 0/0 57 * 0 0 1 0/0 58 * 0 1 0 0/0, 0/1, 1/0, 1/1 59 * 0 1 1 0/0, 1/0 60 * 1 0 0 0/0, 1/1 61 * 1 0 1 0/0, 1/1 62 * 1 1 0 0/0, 0/1, 1/0, 1/1 63 * 1 1 1 0/0, 0/1, 1/1 64 * 65 * If you set MAC_ASYM_PAUSE, the user may request any combination of 66 * tx_pause and rx_pause. You do not have to support these 67 * combinations. 68 * 69 * However, you should support combinations of tx_pause and rx_pause 70 * which might be the result of autonegotation. For example, don't set 71 * MAC_SYM_PAUSE unless your device can support tx_pause and rx_pause 72 * at the same time. 73 */ 74 MAC_SYM_PAUSE = BIT(0), 75 MAC_ASYM_PAUSE = BIT(1), 76 MAC_10HD = BIT(2), 77 MAC_10FD = BIT(3), 78 MAC_10 = MAC_10HD | MAC_10FD, 79 MAC_100HD = BIT(4), 80 MAC_100FD = BIT(5), 81 MAC_100 = MAC_100HD | MAC_100FD, 82 MAC_1000HD = BIT(6), 83 MAC_1000FD = BIT(7), 84 MAC_1000 = MAC_1000HD | MAC_1000FD, 85 MAC_2500FD = BIT(8), 86 MAC_5000FD = BIT(9), 87 MAC_10000FD = BIT(10), 88 MAC_20000FD = BIT(11), 89 MAC_25000FD = BIT(12), 90 MAC_40000FD = BIT(13), 91 MAC_50000FD = BIT(14), 92 MAC_56000FD = BIT(15), 93 MAC_100000FD = BIT(16), 94 MAC_200000FD = BIT(17), 95 MAC_400000FD = BIT(18), 96 }; 97 98 static inline bool phylink_autoneg_inband(unsigned int mode) 99 { 100 return mode == MLO_AN_INBAND; 101 } 102 103 /** 104 * struct phylink_link_state - link state structure 105 * @advertising: ethtool bitmask containing advertised link modes 106 * @lp_advertising: ethtool bitmask containing link partner advertised link 107 * modes 108 * @interface: link &typedef phy_interface_t mode 109 * @speed: link speed, one of the SPEED_* constants. 110 * @duplex: link duplex mode, one of DUPLEX_* constants. 111 * @pause: link pause state, described by MLO_PAUSE_* constants. 112 * @rate_matching: rate matching being performed, one of the RATE_MATCH_* 113 * constants. If rate matching is taking place, then the speed/duplex of 114 * the medium link mode (@speed and @duplex) and the speed/duplex of the phy 115 * interface mode (@interface) are different. 116 * @link: true if the link is up. 117 * @an_complete: true if autonegotiation has completed. 118 */ 119 struct phylink_link_state { 120 __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising); 121 __ETHTOOL_DECLARE_LINK_MODE_MASK(lp_advertising); 122 phy_interface_t interface; 123 int speed; 124 int duplex; 125 int pause; 126 int rate_matching; 127 unsigned int link:1; 128 unsigned int an_complete:1; 129 }; 130 131 enum phylink_op_type { 132 PHYLINK_NETDEV = 0, 133 PHYLINK_DEV, 134 }; 135 136 /** 137 * struct phylink_config - PHYLINK configuration structure 138 * @dev: a pointer to a struct device associated with the MAC 139 * @type: operation type of PHYLINK instance 140 * @poll_fixed_state: if true, starts link_poll, 141 * if MAC link is at %MLO_AN_FIXED mode. 142 * @mac_managed_pm: if true, indicate the MAC driver is responsible for PHY PM. 143 * @mac_requires_rxc: if true, the MAC always requires a receive clock from PHY. 144 * The PHY driver should start the clock signal as soon as 145 * possible and avoid stopping it during suspend events. 146 * @default_an_inband: if true, defaults to MLO_AN_INBAND rather than 147 * MLO_AN_PHY. A fixed-link specification will override. 148 * @eee_rx_clk_stop_enable: if true, PHY can stop the receive clock during LPI 149 * @get_fixed_state: callback to execute to determine the fixed link state, 150 * if MAC link is at %MLO_AN_FIXED mode. 151 * @supported_interfaces: bitmap describing which PHY_INTERFACE_MODE_xxx 152 * are supported by the MAC/PCS. 153 * @lpi_interfaces: bitmap describing which PHY interface modes can support 154 * LPI signalling. 155 * @mac_capabilities: MAC pause/speed/duplex capabilities. 156 * @lpi_capabilities: MAC speeds which can support LPI signalling 157 * @lpi_timer_default: Default EEE LPI timer setting. 158 * @eee_enabled_default: If set, EEE will be enabled by phylink at creation time 159 */ 160 struct phylink_config { 161 struct device *dev; 162 enum phylink_op_type type; 163 bool poll_fixed_state; 164 bool mac_managed_pm; 165 bool mac_requires_rxc; 166 bool default_an_inband; 167 bool eee_rx_clk_stop_enable; 168 void (*get_fixed_state)(struct phylink_config *config, 169 struct phylink_link_state *state); 170 DECLARE_PHY_INTERFACE_MASK(supported_interfaces); 171 DECLARE_PHY_INTERFACE_MASK(lpi_interfaces); 172 unsigned long mac_capabilities; 173 unsigned long lpi_capabilities; 174 u32 lpi_timer_default; 175 bool eee_enabled_default; 176 }; 177 178 void phylink_limit_mac_speed(struct phylink_config *config, u32 max_speed); 179 180 /** 181 * struct phylink_mac_ops - MAC operations structure. 182 * @mac_get_caps: Get MAC capabilities for interface mode. 183 * @mac_select_pcs: Select a PCS for the interface mode. 184 * @mac_prepare: prepare for a major reconfiguration of the interface. 185 * @mac_config: configure the MAC for the selected mode and state. 186 * @mac_finish: finish a major reconfiguration of the interface. 187 * @mac_link_down: take the link down. 188 * @mac_link_up: allow the link to come up. 189 * @mac_disable_tx_lpi: disable LPI. 190 * @mac_enable_tx_lpi: enable and configure LPI. 191 * 192 * The individual methods are described more fully below. 193 */ 194 struct phylink_mac_ops { 195 unsigned long (*mac_get_caps)(struct phylink_config *config, 196 phy_interface_t interface); 197 struct phylink_pcs *(*mac_select_pcs)(struct phylink_config *config, 198 phy_interface_t interface); 199 int (*mac_prepare)(struct phylink_config *config, unsigned int mode, 200 phy_interface_t iface); 201 void (*mac_config)(struct phylink_config *config, unsigned int mode, 202 const struct phylink_link_state *state); 203 int (*mac_finish)(struct phylink_config *config, unsigned int mode, 204 phy_interface_t iface); 205 void (*mac_link_down)(struct phylink_config *config, unsigned int mode, 206 phy_interface_t interface); 207 void (*mac_link_up)(struct phylink_config *config, 208 struct phy_device *phy, unsigned int mode, 209 phy_interface_t interface, int speed, int duplex, 210 bool tx_pause, bool rx_pause); 211 void (*mac_disable_tx_lpi)(struct phylink_config *config); 212 int (*mac_enable_tx_lpi)(struct phylink_config *config, u32 timer, 213 bool tx_clk_stop); 214 }; 215 216 #if 0 /* For kernel-doc purposes only. */ 217 /** 218 * mac_get_caps: Get MAC capabilities for interface mode. 219 * @config: a pointer to a &struct phylink_config. 220 * @interface: PHY interface mode. 221 * 222 * Optional method. When not provided, config->mac_capabilities will be used. 223 * When implemented, this returns the MAC capabilities for the specified 224 * interface mode where there is some special handling required by the MAC 225 * driver (e.g. not supporting half-duplex in certain interface modes.) 226 */ 227 unsigned long mac_get_caps(struct phylink_config *config, 228 phy_interface_t interface); 229 /** 230 * mac_select_pcs: Select a PCS for the interface mode. 231 * @config: a pointer to a &struct phylink_config. 232 * @interface: PHY interface mode for PCS 233 * 234 * Return the &struct phylink_pcs for the specified interface mode, or 235 * NULL if none is required, or an error pointer on error. 236 * 237 * This must not modify any state. It is used to query which PCS should 238 * be used. Phylink will use this during validation to ensure that the 239 * configuration is valid, and when setting a configuration to internally 240 * set the PCS that will be used. 241 */ 242 struct phylink_pcs *mac_select_pcs(struct phylink_config *config, 243 phy_interface_t interface); 244 245 /** 246 * mac_prepare() - prepare to change the PHY interface mode 247 * @config: a pointer to a &struct phylink_config. 248 * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND. 249 * @iface: interface mode to switch to 250 * 251 * phylink will call this method at the beginning of a full initialisation 252 * of the link, which includes changing the interface mode or at initial 253 * startup time. It may be called for the current mode. The MAC driver 254 * should perform whatever actions are required, e.g. disabling the 255 * Serdes PHY. 256 * 257 * This will be the first call in the sequence: 258 * - mac_prepare() 259 * - mac_config() 260 * - pcs_config() 261 * - possible pcs_an_restart() 262 * - mac_finish() 263 * 264 * Returns zero on success, or negative errno on failure which will be 265 * reported to the kernel log. 266 */ 267 int mac_prepare(struct phylink_config *config, unsigned int mode, 268 phy_interface_t iface); 269 270 /** 271 * mac_config() - configure the MAC for the selected mode and state 272 * @config: a pointer to a &struct phylink_config. 273 * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND. 274 * @state: a pointer to a &struct phylink_link_state. 275 * 276 * Note - not all members of @state are valid. In particular, 277 * @state->lp_advertising, @state->link, @state->an_complete are never 278 * guaranteed to be correct, and so any mac_config() implementation must 279 * never reference these fields. 280 * 281 * This will only be called to reconfigure the MAC for a "major" change in 282 * e.g. interface mode. It will not be called for changes in speed, duplex 283 * or pause modes or to change the in-band advertisement. 284 * 285 * In all negotiation modes, as defined by @mode, @state->pause indicates the 286 * pause settings which should be applied as follows. If %MLO_PAUSE_AN is not 287 * set, %MLO_PAUSE_TX and %MLO_PAUSE_RX indicate whether the MAC should send 288 * pause frames and/or act on received pause frames respectively. Otherwise, 289 * the results of in-band negotiation/status from the MAC PCS should be used 290 * to control the MAC pause mode settings. 291 * 292 * The action performed depends on the currently selected mode: 293 * 294 * %MLO_AN_FIXED, %MLO_AN_PHY: 295 * Configure for non-inband negotiation mode, where the link settings 296 * are completely communicated via mac_link_up(). The physical link 297 * protocol from the MAC is specified by @state->interface. 298 * 299 * @state->advertising may be used, but is not required. 300 * 301 * Older drivers (prior to the mac_link_up() change) may use @state->speed, 302 * @state->duplex and @state->pause to configure the MAC, but this is 303 * deprecated; such drivers should be converted to use mac_link_up(). 304 * 305 * Other members of @state must be ignored. 306 * 307 * Valid state members: interface, advertising. 308 * Deprecated state members: speed, duplex, pause. 309 * 310 * %MLO_AN_INBAND: 311 * place the link in an inband negotiation mode (such as 802.3z 312 * 1000base-X or Cisco SGMII mode depending on the @state->interface 313 * mode). In both cases, link state management (whether the link 314 * is up or not) is performed by the MAC, and reported via the 315 * pcs_get_state() callback. Changes in link state must be made 316 * by calling phylink_mac_change(). 317 * 318 * Interface mode specific details are mentioned below. 319 * 320 * If in 802.3z mode, the link speed is fixed, dependent on the 321 * @state->interface. Duplex and pause modes are negotiated via 322 * the in-band configuration word. Advertised pause modes are set 323 * according to the @state->an_enabled and @state->advertising 324 * flags. Beware of MACs which only support full duplex at gigabit 325 * and higher speeds. 326 * 327 * If in Cisco SGMII mode, the link speed and duplex mode are passed 328 * in the serial bitstream 16-bit configuration word, and the MAC 329 * should be configured to read these bits and acknowledge the 330 * configuration word. Nothing is advertised by the MAC. The MAC is 331 * responsible for reading the configuration word and configuring 332 * itself accordingly. 333 * 334 * Valid state members: interface, an_enabled, pause, advertising. 335 * 336 * Implementations are expected to update the MAC to reflect the 337 * requested settings - i.o.w., if nothing has changed between two 338 * calls, no action is expected. If only flow control settings have 339 * changed, flow control should be updated *without* taking the link 340 * down. This "update" behaviour is critical to avoid bouncing the 341 * link up status. 342 */ 343 void mac_config(struct phylink_config *config, unsigned int mode, 344 const struct phylink_link_state *state); 345 346 /** 347 * mac_finish() - finish a to change the PHY interface mode 348 * @config: a pointer to a &struct phylink_config. 349 * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND. 350 * @iface: interface mode to switch to 351 * 352 * phylink will call this if it called mac_prepare() to allow the MAC to 353 * complete any necessary steps after the MAC and PCS have been configured 354 * for the @mode and @iface. E.g. a MAC driver may wish to re-enable the 355 * Serdes PHY here if it was previously disabled by mac_prepare(). 356 * 357 * Returns zero on success, or negative errno on failure which will be 358 * reported to the kernel log. 359 */ 360 int mac_finish(struct phylink_config *config, unsigned int mode, 361 phy_interface_t iface); 362 363 /** 364 * mac_link_down() - take the link down 365 * @config: a pointer to a &struct phylink_config. 366 * @mode: link autonegotiation mode 367 * @interface: link &typedef phy_interface_t mode 368 * 369 * If @mode is not an in-band negotiation mode (as defined by 370 * phylink_autoneg_inband()), force the link down and disable any 371 * Energy Efficient Ethernet MAC configuration. Interface type 372 * selection must be done in mac_config(). 373 */ 374 void mac_link_down(struct phylink_config *config, unsigned int mode, 375 phy_interface_t interface); 376 377 /** 378 * mac_link_up() - allow the link to come up 379 * @config: a pointer to a &struct phylink_config. 380 * @phy: any attached phy 381 * @mode: link autonegotiation mode 382 * @interface: link &typedef phy_interface_t mode 383 * @speed: link speed 384 * @duplex: link duplex 385 * @tx_pause: link transmit pause enablement status 386 * @rx_pause: link receive pause enablement status 387 * 388 * Configure the MAC for an established link. 389 * 390 * @speed, @duplex, @tx_pause and @rx_pause indicate the finalised link 391 * settings, and should be used to configure the MAC block appropriately 392 * where these settings are not automatically conveyed from the PCS block, 393 * or if in-band negotiation (as defined by phylink_autoneg_inband(@mode)) 394 * is disabled. 395 * 396 * Note that when 802.3z in-band negotiation is in use, it is possible 397 * that the user wishes to override the pause settings, and this should 398 * be allowed when considering the implementation of this method. 399 * 400 * If in-band negotiation mode is disabled, allow the link to come up. If 401 * @phy is non-%NULL, configure Energy Efficient Ethernet by calling 402 * phy_init_eee() and perform appropriate MAC configuration for EEE. 403 * Interface type selection must be done in mac_config(). 404 */ 405 void mac_link_up(struct phylink_config *config, struct phy_device *phy, 406 unsigned int mode, phy_interface_t interface, 407 int speed, int duplex, bool tx_pause, bool rx_pause); 408 409 /** 410 * mac_disable_tx_lpi() - disable LPI generation at the MAC 411 * @config: a pointer to a &struct phylink_config. 412 * 413 * Disable generation of LPI at the MAC, effectively preventing the MAC 414 * from indicating that it is idle. 415 */ 416 void mac_disable_tx_lpi(struct phylink_config *config); 417 418 /** 419 * mac_enable_tx_lpi() - configure and enable LPI generation at the MAC 420 * @config: a pointer to a &struct phylink_config. 421 * @timer: LPI timeout in microseconds. 422 * @tx_clk_stop: allow xMII transmit clock to be stopped during LPI 423 * 424 * Configure the LPI timeout accordingly. This will only be called when 425 * the link is already up, to cater for situations where the hardware 426 * needs to be programmed according to the link speed. 427 * 428 * Enable LPI generation at the MAC, and configure whether the xMII transmit 429 * clock may be stopped. 430 * 431 * Returns: 0 on success. Please consult with rmk before returning an error. 432 */ 433 int mac_enable_tx_lpi(struct phylink_config *config, u32 timer, 434 bool tx_clk_stop); 435 #endif 436 437 struct phylink_pcs_ops; 438 439 /** 440 * struct phylink_pcs - PHYLINK PCS instance 441 * @supported_interfaces: describing which PHY_INTERFACE_MODE_xxx 442 * are supported by this PCS. 443 * @ops: a pointer to the &struct phylink_pcs_ops structure 444 * @phylink: pointer to &struct phylink_config 445 * @neg_mode: provide PCS neg mode via "mode" argument 446 * @poll: poll the PCS for link changes 447 * @rxc_always_on: The MAC driver requires the reference clock 448 * to always be on. Standalone PCS drivers which 449 * do not have access to a PHY device can check 450 * this instead of PHY_F_RXC_ALWAYS_ON. 451 * 452 * This structure is designed to be embedded within the PCS private data, 453 * and will be passed between phylink and the PCS. 454 * 455 * The @phylink member is private to phylink and must not be touched by 456 * the PCS driver. 457 */ 458 struct phylink_pcs { 459 DECLARE_PHY_INTERFACE_MASK(supported_interfaces); 460 const struct phylink_pcs_ops *ops; 461 struct phylink *phylink; 462 bool neg_mode; 463 bool poll; 464 bool rxc_always_on; 465 }; 466 467 /** 468 * struct phylink_pcs_ops - MAC PCS operations structure. 469 * @pcs_validate: validate the link configuration. 470 * @pcs_inband_caps: query inband support for interface mode. 471 * @pcs_enable: enable the PCS. 472 * @pcs_disable: disable the PCS. 473 * @pcs_pre_config: pre-mac_config method (for errata) 474 * @pcs_post_config: post-mac_config method (for arrata) 475 * @pcs_get_state: read the current MAC PCS link state from the hardware. 476 * @pcs_config: configure the MAC PCS for the selected mode and state. 477 * @pcs_an_restart: restart 802.3z BaseX autonegotiation. 478 * @pcs_link_up: program the PCS for the resolved link configuration 479 * (where necessary). 480 * @pcs_pre_init: configure PCS components necessary for MAC hardware 481 * initialization e.g. RX clock for stmmac. 482 */ 483 struct phylink_pcs_ops { 484 int (*pcs_validate)(struct phylink_pcs *pcs, unsigned long *supported, 485 const struct phylink_link_state *state); 486 unsigned int (*pcs_inband_caps)(struct phylink_pcs *pcs, 487 phy_interface_t interface); 488 int (*pcs_enable)(struct phylink_pcs *pcs); 489 void (*pcs_disable)(struct phylink_pcs *pcs); 490 void (*pcs_pre_config)(struct phylink_pcs *pcs, 491 phy_interface_t interface); 492 int (*pcs_post_config)(struct phylink_pcs *pcs, 493 phy_interface_t interface); 494 void (*pcs_get_state)(struct phylink_pcs *pcs, unsigned int neg_mode, 495 struct phylink_link_state *state); 496 int (*pcs_config)(struct phylink_pcs *pcs, unsigned int neg_mode, 497 phy_interface_t interface, 498 const unsigned long *advertising, 499 bool permit_pause_to_mac); 500 void (*pcs_an_restart)(struct phylink_pcs *pcs); 501 void (*pcs_link_up)(struct phylink_pcs *pcs, unsigned int neg_mode, 502 phy_interface_t interface, int speed, int duplex); 503 int (*pcs_pre_init)(struct phylink_pcs *pcs); 504 }; 505 506 #if 0 /* For kernel-doc purposes only. */ 507 /** 508 * pcs_validate() - validate the link configuration. 509 * @pcs: a pointer to a &struct phylink_pcs. 510 * @supported: ethtool bitmask for supported link modes. 511 * @state: a const pointer to a &struct phylink_link_state. 512 * 513 * Validate the interface mode, and advertising's autoneg bit, removing any 514 * media ethtool link modes that would not be supportable from the supported 515 * mask. Phylink will propagate the changes to the advertising mask. See the 516 * &struct phylink_mac_ops validate() method. 517 * 518 * Returns -EINVAL if the interface mode/autoneg mode is not supported. 519 * Returns non-zero positive if the link state can be supported. 520 */ 521 int pcs_validate(struct phylink_pcs *pcs, unsigned long *supported, 522 const struct phylink_link_state *state); 523 524 /** 525 * pcs_inband_caps - query PCS in-band capabilities for interface mode. 526 * @pcs: a pointer to a &struct phylink_pcs. 527 * @interface: interface mode to be queried 528 * 529 * Returns zero if it is unknown what in-band signalling is supported by the 530 * PHY (e.g. because the PHY driver doesn't implement the method.) Otherwise, 531 * returns a bit mask of the LINK_INBAND_* values from 532 * &enum link_inband_signalling to describe which inband modes are supported 533 * for this interface mode. 534 */ 535 unsigned int pcs_inband_caps(struct phylink_pcs *pcs, 536 phy_interface_t interface); 537 538 /** 539 * pcs_enable() - enable the PCS. 540 * @pcs: a pointer to a &struct phylink_pcs. 541 */ 542 int pcs_enable(struct phylink_pcs *pcs); 543 544 /** 545 * pcs_disable() - disable the PCS. 546 * @pcs: a pointer to a &struct phylink_pcs. 547 */ 548 void pcs_disable(struct phylink_pcs *pcs); 549 550 /** 551 * pcs_get_state() - Read the current inband link state from the hardware 552 * @pcs: a pointer to a &struct phylink_pcs. 553 * @neg_mode: link negotiation mode (PHYLINK_PCS_NEG_xxx) 554 * @state: a pointer to a &struct phylink_link_state. 555 * 556 * Read the current inband link state from the MAC PCS, reporting the 557 * current speed in @state->speed, duplex mode in @state->duplex, pause 558 * mode in @state->pause using the %MLO_PAUSE_RX and %MLO_PAUSE_TX bits, 559 * negotiation completion state in @state->an_complete, and link up state 560 * in @state->link. If possible, @state->lp_advertising should also be 561 * populated. 562 * 563 * Note that the @neg_mode parameter is always the PHYLINK_PCS_NEG_xxx 564 * state, not MLO_AN_xxx. 565 */ 566 void pcs_get_state(struct phylink_pcs *pcs, unsigned int neg_mode, 567 struct phylink_link_state *state); 568 569 /** 570 * pcs_config() - Configure the PCS mode and advertisement 571 * @pcs: a pointer to a &struct phylink_pcs. 572 * @neg_mode: link negotiation mode (see below) 573 * @interface: interface mode to be used 574 * @advertising: adertisement ethtool link mode mask 575 * @permit_pause_to_mac: permit forwarding pause resolution to MAC 576 * 577 * Configure the PCS for the operating mode, the interface mode, and set 578 * the advertisement mask. @permit_pause_to_mac indicates whether the 579 * hardware may forward the pause mode resolution to the MAC. 580 * 581 * When operating in %MLO_AN_INBAND, inband should always be enabled, 582 * otherwise inband should be disabled. 583 * 584 * For SGMII, there is no advertisement from the MAC side, the PCS should 585 * be programmed to acknowledge the inband word from the PHY. 586 * 587 * For 1000BASE-X, the advertisement should be programmed into the PCS. 588 * 589 * For most 10GBASE-R, there is no advertisement. 590 * 591 * The %neg_mode argument should be tested via the phylink_mode_*() family of 592 * functions, or for PCS that set pcs->neg_mode true, should be tested 593 * against the PHYLINK_PCS_NEG_* definitions. 594 */ 595 int pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode, 596 phy_interface_t interface, const unsigned long *advertising, 597 bool permit_pause_to_mac); 598 599 /** 600 * pcs_an_restart() - restart 802.3z BaseX autonegotiation 601 * @pcs: a pointer to a &struct phylink_pcs. 602 * 603 * When PCS ops are present, this overrides mac_an_restart() in &struct 604 * phylink_mac_ops. 605 */ 606 void pcs_an_restart(struct phylink_pcs *pcs); 607 608 /** 609 * pcs_link_up() - program the PCS for the resolved link configuration 610 * @pcs: a pointer to a &struct phylink_pcs. 611 * @neg_mode: link negotiation mode (see below) 612 * @interface: link &typedef phy_interface_t mode 613 * @speed: link speed 614 * @duplex: link duplex 615 * 616 * This call will be made just before mac_link_up() to inform the PCS of 617 * the resolved link parameters. For example, a PCS operating in SGMII 618 * mode without in-band AN needs to be manually configured for the link 619 * and duplex setting. Otherwise, this should be a no-op. 620 * 621 * The %mode argument should be tested via the phylink_mode_*() family of 622 * functions, or for PCS that set pcs->neg_mode true, should be tested 623 * against the PHYLINK_PCS_NEG_* definitions. 624 */ 625 void pcs_link_up(struct phylink_pcs *pcs, unsigned int neg_mode, 626 phy_interface_t interface, int speed, int duplex); 627 628 /** 629 * pcs_pre_init() - Configure PCS components necessary for MAC initialization 630 * @pcs: a pointer to a &struct phylink_pcs. 631 * 632 * This function can be called by MAC drivers through the 633 * phylink_pcs_pre_init() wrapper, before their hardware is initialized. It 634 * should not be called after the link is brought up, as reconfiguring the PCS 635 * at this point could break the link. 636 * 637 * Some MAC devices require specific hardware initialization to be performed by 638 * their associated PCS device before they can properly initialize their own 639 * hardware. An example of this is the initialization of stmmac controllers, 640 * which requires an active REF_CLK signal to be provided by the PHY/PCS. 641 * 642 * By calling phylink_pcs_pre_init(), MAC drivers can ensure that the PCS is 643 * setup in a way that allows for successful hardware initialization. 644 * 645 * The specific configuration performed by pcs_pre_init() is dependent on the 646 * model of PCS and the requirements of the MAC device attached to it. PCS 647 * driver authors should consider whether their target device is to be used in 648 * conjunction with a MAC device whose driver calls phylink_pcs_pre_init(). MAC 649 * driver authors should document their requirements for the PCS 650 * pre-initialization. 651 * 652 */ 653 int pcs_pre_init(struct phylink_pcs *pcs); 654 655 #endif 656 657 struct phylink *phylink_create(struct phylink_config *, 658 const struct fwnode_handle *, 659 phy_interface_t, 660 const struct phylink_mac_ops *); 661 void phylink_destroy(struct phylink *); 662 bool phylink_expects_phy(struct phylink *pl); 663 664 int phylink_connect_phy(struct phylink *, struct phy_device *); 665 int phylink_of_phy_connect(struct phylink *, struct device_node *, u32 flags); 666 int phylink_fwnode_phy_connect(struct phylink *pl, 667 const struct fwnode_handle *fwnode, 668 u32 flags); 669 void phylink_disconnect_phy(struct phylink *); 670 int phylink_set_fixed_link(struct phylink *, 671 const struct phylink_link_state *); 672 673 void phylink_mac_change(struct phylink *, bool up); 674 void phylink_pcs_change(struct phylink_pcs *, bool up); 675 676 int phylink_pcs_pre_init(struct phylink *pl, struct phylink_pcs *pcs); 677 678 void phylink_start(struct phylink *); 679 void phylink_stop(struct phylink *); 680 681 void phylink_suspend(struct phylink *pl, bool mac_wol); 682 void phylink_resume(struct phylink *pl); 683 684 void phylink_ethtool_get_wol(struct phylink *, struct ethtool_wolinfo *); 685 int phylink_ethtool_set_wol(struct phylink *, struct ethtool_wolinfo *); 686 687 int phylink_ethtool_ksettings_get(struct phylink *, 688 struct ethtool_link_ksettings *); 689 int phylink_ethtool_ksettings_set(struct phylink *, 690 const struct ethtool_link_ksettings *); 691 int phylink_ethtool_nway_reset(struct phylink *); 692 void phylink_ethtool_get_pauseparam(struct phylink *, 693 struct ethtool_pauseparam *); 694 int phylink_ethtool_set_pauseparam(struct phylink *, 695 struct ethtool_pauseparam *); 696 int phylink_get_eee_err(struct phylink *); 697 int phylink_init_eee(struct phylink *, bool); 698 int phylink_ethtool_get_eee(struct phylink *link, struct ethtool_keee *eee); 699 int phylink_ethtool_set_eee(struct phylink *link, struct ethtool_keee *eee); 700 int phylink_mii_ioctl(struct phylink *, struct ifreq *, int); 701 int phylink_speed_down(struct phylink *pl, bool sync); 702 int phylink_speed_up(struct phylink *pl); 703 704 #define phylink_zero(bm) \ 705 bitmap_zero(bm, __ETHTOOL_LINK_MODE_MASK_NBITS) 706 #define __phylink_do_bit(op, bm, mode) \ 707 op(ETHTOOL_LINK_MODE_ ## mode ## _BIT, bm) 708 709 #define phylink_set(bm, mode) __phylink_do_bit(__set_bit, bm, mode) 710 #define phylink_clear(bm, mode) __phylink_do_bit(__clear_bit, bm, mode) 711 #define phylink_test(bm, mode) __phylink_do_bit(test_bit, bm, mode) 712 713 void phylink_set_port_modes(unsigned long *bits); 714 715 /** 716 * phylink_get_link_timer_ns - return the PCS link timer value 717 * @interface: link &typedef phy_interface_t mode 718 * 719 * Return the PCS link timer setting in nanoseconds for the PHY @interface 720 * mode, or -EINVAL if not appropriate. 721 */ 722 static inline int phylink_get_link_timer_ns(phy_interface_t interface) 723 { 724 switch (interface) { 725 case PHY_INTERFACE_MODE_SGMII: 726 case PHY_INTERFACE_MODE_QSGMII: 727 case PHY_INTERFACE_MODE_USXGMII: 728 case PHY_INTERFACE_MODE_10G_QXGMII: 729 return 1600000; 730 731 case PHY_INTERFACE_MODE_1000BASEX: 732 case PHY_INTERFACE_MODE_2500BASEX: 733 return 10000000; 734 735 default: 736 return -EINVAL; 737 } 738 } 739 740 void phylink_mii_c22_pcs_decode_state(struct phylink_link_state *state, 741 unsigned int neg_mode, u16 bmsr, u16 lpa); 742 void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs, 743 unsigned int neg_mode, 744 struct phylink_link_state *state); 745 int phylink_mii_c22_pcs_encode_advertisement(phy_interface_t interface, 746 const unsigned long *advertising); 747 int phylink_mii_c22_pcs_config(struct mdio_device *pcs, 748 phy_interface_t interface, 749 const unsigned long *advertising, 750 unsigned int neg_mode); 751 void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs); 752 753 void phylink_resolve_c73(struct phylink_link_state *state); 754 755 void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs, 756 struct phylink_link_state *state); 757 758 void phylink_decode_usxgmii_word(struct phylink_link_state *state, 759 uint16_t lpa); 760 #endif 761