5 #include <linux/spinlock.h>
6 #include <linux/workqueue.h>
15 MLO_PAUSE_RX = BIT(0),
16 MLO_PAUSE_TX = BIT(1),
17 MLO_PAUSE_TXRX_MASK = MLO_PAUSE_TX | MLO_PAUSE_RX,
18 MLO_PAUSE_AN = BIT(2),
20 MLO_AN_PHY = 0, /* Conventional PHY */
21 MLO_AN_FIXED, /* Fixed-link mode */
22 MLO_AN_INBAND, /* In-band protocol */
24 MAC_SYM_PAUSE = BIT(0),
25 MAC_ASYM_PAUSE = BIT(1),
28 MAC_10 = MAC_10HD | MAC_10FD,
31 MAC_100 = MAC_100HD | MAC_100FD,
34 MAC_1000 = MAC_1000HD | MAC_1000FD,
37 MAC_10000FD = BIT(10),
38 MAC_20000FD = BIT(11),
39 MAC_25000FD = BIT(12),
40 MAC_40000FD = BIT(13),
41 MAC_50000FD = BIT(14),
42 MAC_56000FD = BIT(15),
43 MAC_100000FD = BIT(16),
44 MAC_200000FD = BIT(17),
45 MAC_400000FD = BIT(18),
48 static inline bool phylink_autoneg_inband(unsigned int mode)
50 return mode == MLO_AN_INBAND;
54 * struct phylink_link_state - link state structure
55 * @advertising: ethtool bitmask containing advertised link modes
56 * @lp_advertising: ethtool bitmask containing link partner advertised link
58 * @interface: link &typedef phy_interface_t mode
59 * @speed: link speed, one of the SPEED_* constants.
60 * @duplex: link duplex mode, one of DUPLEX_* constants.
61 * @pause: link pause state, described by MLO_PAUSE_* constants.
62 * @link: true if the link is up.
63 * @an_enabled: true if autonegotiation is enabled/desired.
64 * @an_complete: true if autonegotiation has completed.
66 struct phylink_link_state {
67 __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
68 __ETHTOOL_DECLARE_LINK_MODE_MASK(lp_advertising);
69 phy_interface_t interface;
74 unsigned int an_enabled:1;
75 unsigned int an_complete:1;
78 enum phylink_op_type {
84 * struct phylink_config - PHYLINK configuration structure
85 * @dev: a pointer to a struct device associated with the MAC
86 * @type: operation type of PHYLINK instance
87 * @legacy_pre_march2020: driver has not been updated for March 2020 updates
88 * (See commit 7cceb599d15d ("net: phylink: avoid mac_config calls")
89 * @pcs_poll: MAC PCS cannot provide link change interrupt
90 * @poll_fixed_state: if true, starts link_poll,
91 * if MAC link is at %MLO_AN_FIXED mode.
92 * @ovr_an_inband: if true, override PCS to MLO_AN_INBAND
93 * @get_fixed_state: callback to execute to determine the fixed link state,
94 * if MAC link is at %MLO_AN_FIXED mode.
95 * @supported_interfaces: bitmap describing which PHY_INTERFACE_MODE_xxx
96 * are supported by the MAC/PCS.
97 * @mac_capabilities: MAC pause/speed/duplex capabilities.
99 struct phylink_config {
101 enum phylink_op_type type;
102 bool legacy_pre_march2020;
104 bool poll_fixed_state;
106 void (*get_fixed_state)(struct phylink_config *config,
107 struct phylink_link_state *state);
108 DECLARE_PHY_INTERFACE_MASK(supported_interfaces);
109 unsigned long mac_capabilities;
113 * struct phylink_mac_ops - MAC operations structure.
114 * @validate: Validate and update the link configuration.
115 * @mac_select_pcs: Select a PCS for the interface mode.
116 * @mac_pcs_get_state: Read the current link state from the hardware.
117 * @mac_prepare: prepare for a major reconfiguration of the interface.
118 * @mac_config: configure the MAC for the selected mode and state.
119 * @mac_finish: finish a major reconfiguration of the interface.
120 * @mac_an_restart: restart 802.3z BaseX autonegotiation.
121 * @mac_link_down: take the link down.
122 * @mac_link_up: allow the link to come up.
124 * The individual methods are described more fully below.
126 struct phylink_mac_ops {
127 void (*validate)(struct phylink_config *config,
128 unsigned long *supported,
129 struct phylink_link_state *state);
130 struct phylink_pcs *(*mac_select_pcs)(struct phylink_config *config,
131 phy_interface_t interface);
132 void (*mac_pcs_get_state)(struct phylink_config *config,
133 struct phylink_link_state *state);
134 int (*mac_prepare)(struct phylink_config *config, unsigned int mode,
135 phy_interface_t iface);
136 void (*mac_config)(struct phylink_config *config, unsigned int mode,
137 const struct phylink_link_state *state);
138 int (*mac_finish)(struct phylink_config *config, unsigned int mode,
139 phy_interface_t iface);
140 void (*mac_an_restart)(struct phylink_config *config);
141 void (*mac_link_down)(struct phylink_config *config, unsigned int mode,
142 phy_interface_t interface);
143 void (*mac_link_up)(struct phylink_config *config,
144 struct phy_device *phy, unsigned int mode,
145 phy_interface_t interface, int speed, int duplex,
146 bool tx_pause, bool rx_pause);
149 #if 0 /* For kernel-doc purposes only. */
151 * validate - Validate and update the link configuration
152 * @config: a pointer to a &struct phylink_config.
153 * @supported: ethtool bitmask for supported link modes.
154 * @state: a pointer to a &struct phylink_link_state.
156 * Clear bits in the @supported and @state->advertising masks that
157 * are not supportable by the MAC.
159 * Note that the PHY may be able to transform from one connection
160 * technology to another, so, eg, don't clear 1000BaseX just
161 * because the MAC is unable to BaseX mode. This is more about
162 * clearing unsupported speeds and duplex settings. The port modes
163 * should not be cleared; phylink_set_port_modes() will help with this.
165 * If the @state->interface mode is %PHY_INTERFACE_MODE_1000BASEX
166 * or %PHY_INTERFACE_MODE_2500BASEX, select the appropriate mode
167 * based on @state->advertising and/or @state->speed and update
168 * @state->interface accordingly. See phylink_helper_basex_speed().
170 * When @config->supported_interfaces has been set, phylink will iterate
171 * over the supported interfaces to determine the full capability of the
172 * MAC. The validation function must not print errors if @state->interface
173 * is set to an unexpected value.
175 * When @config->supported_interfaces is empty, phylink will call this
176 * function with @state->interface set to %PHY_INTERFACE_MODE_NA, and
177 * expects the MAC driver to return all supported link modes.
179 * If the @state->interface mode is not supported, then the @supported
180 * mask must be cleared.
182 void validate(struct phylink_config *config, unsigned long *supported,
183 struct phylink_link_state *state);
185 * mac_select_pcs: Select a PCS for the interface mode.
186 * @config: a pointer to a &struct phylink_config.
187 * @interface: PHY interface mode for PCS
189 * Return the &struct phylink_pcs for the specified interface mode, or
190 * NULL if none is required, or an error pointer on error.
192 * This must not modify any state. It is used to query which PCS should
193 * be used. Phylink will use this during validation to ensure that the
194 * configuration is valid, and when setting a configuration to internally
195 * set the PCS that will be used.
197 struct phylink_pcs *mac_select_pcs(struct phylink_config *config,
198 phy_interface_t interface);
201 * mac_pcs_get_state() - Read the current inband link state from the hardware
202 * @config: a pointer to a &struct phylink_config.
203 * @state: a pointer to a &struct phylink_link_state.
205 * Read the current inband link state from the MAC PCS, reporting the
206 * current speed in @state->speed, duplex mode in @state->duplex, pause
207 * mode in @state->pause using the %MLO_PAUSE_RX and %MLO_PAUSE_TX bits,
208 * negotiation completion state in @state->an_complete, and link up state
209 * in @state->link. If possible, @state->lp_advertising should also be
212 * Note: This is a legacy method. This function will not be called unless
213 * legacy_pre_march2020 is set in &struct phylink_config and there is no
216 void mac_pcs_get_state(struct phylink_config *config,
217 struct phylink_link_state *state);
220 * mac_prepare() - prepare to change the PHY interface mode
221 * @config: a pointer to a &struct phylink_config.
222 * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND.
223 * @iface: interface mode to switch to
225 * phylink will call this method at the beginning of a full initialisation
226 * of the link, which includes changing the interface mode or at initial
227 * startup time. It may be called for the current mode. The MAC driver
228 * should perform whatever actions are required, e.g. disabling the
231 * This will be the first call in the sequence:
235 * - possible pcs_an_restart()
238 * Returns zero on success, or negative errno on failure which will be
239 * reported to the kernel log.
241 int mac_prepare(struct phylink_config *config, unsigned int mode,
242 phy_interface_t iface);
245 * mac_config() - configure the MAC for the selected mode and state
246 * @config: a pointer to a &struct phylink_config.
247 * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND.
248 * @state: a pointer to a &struct phylink_link_state.
250 * Note - not all members of @state are valid. In particular,
251 * @state->lp_advertising, @state->link, @state->an_complete are never
252 * guaranteed to be correct, and so any mac_config() implementation must
253 * never reference these fields.
255 * Note: For legacy March 2020 drivers (drivers with legacy_pre_march2020 set
256 * in their &phylnk_config and which don't have a PCS), this function will be
257 * called on each link up event, and to also change the in-band advert. For
258 * non-legacy drivers, it will only be called to reconfigure the MAC for a
259 * "major" change in e.g. interface mode. It will not be called for changes
260 * in speed, duplex or pause modes or to change the in-band advertisement.
261 * In any case, it is strongly preferred that speed, duplex and pause settings
262 * are handled in the mac_link_up() method and not in this method.
264 * (this requires a rewrite - please refer to mac_link_up() for situations
265 * where the PCS and MAC are not tightly integrated.)
267 * In all negotiation modes, as defined by @mode, @state->pause indicates the
268 * pause settings which should be applied as follows. If %MLO_PAUSE_AN is not
269 * set, %MLO_PAUSE_TX and %MLO_PAUSE_RX indicate whether the MAC should send
270 * pause frames and/or act on received pause frames respectively. Otherwise,
271 * the results of in-band negotiation/status from the MAC PCS should be used
272 * to control the MAC pause mode settings.
274 * The action performed depends on the currently selected mode:
276 * %MLO_AN_FIXED, %MLO_AN_PHY:
277 * Configure for non-inband negotiation mode, where the link settings
278 * are completely communicated via mac_link_up(). The physical link
279 * protocol from the MAC is specified by @state->interface.
281 * @state->advertising may be used, but is not required.
283 * Older drivers (prior to the mac_link_up() change) may use @state->speed,
284 * @state->duplex and @state->pause to configure the MAC, but this is
285 * deprecated; such drivers should be converted to use mac_link_up().
287 * Other members of @state must be ignored.
289 * Valid state members: interface, advertising.
290 * Deprecated state members: speed, duplex, pause.
293 * place the link in an inband negotiation mode (such as 802.3z
294 * 1000base-X or Cisco SGMII mode depending on the @state->interface
295 * mode). In both cases, link state management (whether the link
296 * is up or not) is performed by the MAC, and reported via the
297 * mac_pcs_get_state() callback. Changes in link state must be made
298 * by calling phylink_mac_change().
300 * Interface mode specific details are mentioned below.
302 * If in 802.3z mode, the link speed is fixed, dependent on the
303 * @state->interface. Duplex and pause modes are negotiated via
304 * the in-band configuration word. Advertised pause modes are set
305 * according to the @state->an_enabled and @state->advertising
306 * flags. Beware of MACs which only support full duplex at gigabit
309 * If in Cisco SGMII mode, the link speed and duplex mode are passed
310 * in the serial bitstream 16-bit configuration word, and the MAC
311 * should be configured to read these bits and acknowledge the
312 * configuration word. Nothing is advertised by the MAC. The MAC is
313 * responsible for reading the configuration word and configuring
314 * itself accordingly.
316 * Valid state members: interface, an_enabled, pause, advertising.
318 * Implementations are expected to update the MAC to reflect the
319 * requested settings - i.o.w., if nothing has changed between two
320 * calls, no action is expected. If only flow control settings have
321 * changed, flow control should be updated *without* taking the link
322 * down. This "update" behaviour is critical to avoid bouncing the
325 void mac_config(struct phylink_config *config, unsigned int mode,
326 const struct phylink_link_state *state);
329 * mac_finish() - finish a to change the PHY interface mode
330 * @config: a pointer to a &struct phylink_config.
331 * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND.
332 * @iface: interface mode to switch to
334 * phylink will call this if it called mac_prepare() to allow the MAC to
335 * complete any necessary steps after the MAC and PCS have been configured
336 * for the @mode and @iface. E.g. a MAC driver may wish to re-enable the
337 * Serdes PHY here if it was previously disabled by mac_prepare().
339 * Returns zero on success, or negative errno on failure which will be
340 * reported to the kernel log.
342 int mac_finish(struct phylink_config *config, unsigned int mode,
343 phy_interface_t iface);
346 * mac_an_restart() - restart 802.3z BaseX autonegotiation
347 * @config: a pointer to a &struct phylink_config.
349 * Note: This is a legacy method. This function will not be called unless
350 * legacy_pre_march2020 is set in &struct phylink_config and there is no
353 void mac_an_restart(struct phylink_config *config);
356 * mac_link_down() - take the link down
357 * @config: a pointer to a &struct phylink_config.
358 * @mode: link autonegotiation mode
359 * @interface: link &typedef phy_interface_t mode
361 * If @mode is not an in-band negotiation mode (as defined by
362 * phylink_autoneg_inband()), force the link down and disable any
363 * Energy Efficient Ethernet MAC configuration. Interface type
364 * selection must be done in mac_config().
366 void mac_link_down(struct phylink_config *config, unsigned int mode,
367 phy_interface_t interface);
370 * mac_link_up() - allow the link to come up
371 * @config: a pointer to a &struct phylink_config.
372 * @phy: any attached phy
373 * @mode: link autonegotiation mode
374 * @interface: link &typedef phy_interface_t mode
376 * @duplex: link duplex
377 * @tx_pause: link transmit pause enablement status
378 * @rx_pause: link receive pause enablement status
380 * Configure the MAC for an established link.
382 * @speed, @duplex, @tx_pause and @rx_pause indicate the finalised link
383 * settings, and should be used to configure the MAC block appropriately
384 * where these settings are not automatically conveyed from the PCS block,
385 * or if in-band negotiation (as defined by phylink_autoneg_inband(@mode))
388 * Note that when 802.3z in-band negotiation is in use, it is possible
389 * that the user wishes to override the pause settings, and this should
390 * be allowed when considering the implementation of this method.
392 * If in-band negotiation mode is disabled, allow the link to come up. If
393 * @phy is non-%NULL, configure Energy Efficient Ethernet by calling
394 * phy_init_eee() and perform appropriate MAC configuration for EEE.
395 * Interface type selection must be done in mac_config().
397 void mac_link_up(struct phylink_config *config, struct phy_device *phy,
398 unsigned int mode, phy_interface_t interface,
399 int speed, int duplex, bool tx_pause, bool rx_pause);
402 struct phylink_pcs_ops;
405 * struct phylink_pcs - PHYLINK PCS instance
406 * @ops: a pointer to the &struct phylink_pcs_ops structure
407 * @poll: poll the PCS for link changes
409 * This structure is designed to be embedded within the PCS private data,
410 * and will be passed between phylink and the PCS.
413 const struct phylink_pcs_ops *ops;
418 * struct phylink_pcs_ops - MAC PCS operations structure.
419 * @pcs_validate: validate the link configuration.
420 * @pcs_get_state: read the current MAC PCS link state from the hardware.
421 * @pcs_config: configure the MAC PCS for the selected mode and state.
422 * @pcs_an_restart: restart 802.3z BaseX autonegotiation.
423 * @pcs_link_up: program the PCS for the resolved link configuration
426 struct phylink_pcs_ops {
427 int (*pcs_validate)(struct phylink_pcs *pcs, unsigned long *supported,
428 const struct phylink_link_state *state);
429 void (*pcs_get_state)(struct phylink_pcs *pcs,
430 struct phylink_link_state *state);
431 int (*pcs_config)(struct phylink_pcs *pcs, unsigned int mode,
432 phy_interface_t interface,
433 const unsigned long *advertising,
434 bool permit_pause_to_mac);
435 void (*pcs_an_restart)(struct phylink_pcs *pcs);
436 void (*pcs_link_up)(struct phylink_pcs *pcs, unsigned int mode,
437 phy_interface_t interface, int speed, int duplex);
440 #if 0 /* For kernel-doc purposes only. */
442 * pcs_validate() - validate the link configuration.
443 * @pcs: a pointer to a &struct phylink_pcs.
444 * @supported: ethtool bitmask for supported link modes.
445 * @state: a const pointer to a &struct phylink_link_state.
447 * Validate the interface mode, and advertising's autoneg bit, removing any
448 * media ethtool link modes that would not be supportable from the supported
449 * mask. Phylink will propagate the changes to the advertising mask. See the
450 * &struct phylink_mac_ops validate() method.
452 * Returns -EINVAL if the interface mode/autoneg mode is not supported.
453 * Returns non-zero positive if the link state can be supported.
455 int pcs_validate(struct phylink_pcs *pcs, unsigned long *supported,
456 const struct phylink_link_state *state);
459 * pcs_get_state() - Read the current inband link state from the hardware
460 * @pcs: a pointer to a &struct phylink_pcs.
461 * @state: a pointer to a &struct phylink_link_state.
463 * Read the current inband link state from the MAC PCS, reporting the
464 * current speed in @state->speed, duplex mode in @state->duplex, pause
465 * mode in @state->pause using the %MLO_PAUSE_RX and %MLO_PAUSE_TX bits,
466 * negotiation completion state in @state->an_complete, and link up state
467 * in @state->link. If possible, @state->lp_advertising should also be
470 * When present, this overrides mac_pcs_get_state() in &struct
473 void pcs_get_state(struct phylink_pcs *pcs,
474 struct phylink_link_state *state);
477 * pcs_config() - Configure the PCS mode and advertisement
478 * @pcs: a pointer to a &struct phylink_pcs.
479 * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND.
480 * @interface: interface mode to be used
481 * @advertising: adertisement ethtool link mode mask
482 * @permit_pause_to_mac: permit forwarding pause resolution to MAC
484 * Configure the PCS for the operating mode, the interface mode, and set
485 * the advertisement mask. @permit_pause_to_mac indicates whether the
486 * hardware may forward the pause mode resolution to the MAC.
488 * When operating in %MLO_AN_INBAND, inband should always be enabled,
489 * otherwise inband should be disabled.
491 * For SGMII, there is no advertisement from the MAC side, the PCS should
492 * be programmed to acknowledge the inband word from the PHY.
494 * For 1000BASE-X, the advertisement should be programmed into the PCS.
496 * For most 10GBASE-R, there is no advertisement.
498 int pcs_config(struct phylink_pcs *pcs, unsigned int mode,
499 phy_interface_t interface, const unsigned long *advertising,
500 bool permit_pause_to_mac);
503 * pcs_an_restart() - restart 802.3z BaseX autonegotiation
504 * @pcs: a pointer to a &struct phylink_pcs.
506 * When PCS ops are present, this overrides mac_an_restart() in &struct
509 void pcs_an_restart(struct phylink_pcs *pcs);
512 * pcs_link_up() - program the PCS for the resolved link configuration
513 * @pcs: a pointer to a &struct phylink_pcs.
514 * @mode: link autonegotiation mode
515 * @interface: link &typedef phy_interface_t mode
517 * @duplex: link duplex
519 * This call will be made just before mac_link_up() to inform the PCS of
520 * the resolved link parameters. For example, a PCS operating in SGMII
521 * mode without in-band AN needs to be manually configured for the link
522 * and duplex setting. Otherwise, this should be a no-op.
524 void pcs_link_up(struct phylink_pcs *pcs, unsigned int mode,
525 phy_interface_t interface, int speed, int duplex);
528 void phylink_get_linkmodes(unsigned long *linkmodes, phy_interface_t interface,
529 unsigned long mac_capabilities);
530 void phylink_generic_validate(struct phylink_config *config,
531 unsigned long *supported,
532 struct phylink_link_state *state);
534 struct phylink *phylink_create(struct phylink_config *, struct fwnode_handle *,
535 phy_interface_t iface,
536 const struct phylink_mac_ops *mac_ops);
537 void phylink_set_pcs(struct phylink *, struct phylink_pcs *pcs);
538 void phylink_destroy(struct phylink *);
540 int phylink_connect_phy(struct phylink *, struct phy_device *);
541 int phylink_of_phy_connect(struct phylink *, struct device_node *, u32 flags);
542 int phylink_fwnode_phy_connect(struct phylink *pl,
543 struct fwnode_handle *fwnode,
545 void phylink_disconnect_phy(struct phylink *);
547 void phylink_mac_change(struct phylink *, bool up);
549 void phylink_start(struct phylink *);
550 void phylink_stop(struct phylink *);
552 void phylink_suspend(struct phylink *pl, bool mac_wol);
553 void phylink_resume(struct phylink *pl);
555 void phylink_ethtool_get_wol(struct phylink *, struct ethtool_wolinfo *);
556 int phylink_ethtool_set_wol(struct phylink *, struct ethtool_wolinfo *);
558 int phylink_ethtool_ksettings_get(struct phylink *,
559 struct ethtool_link_ksettings *);
560 int phylink_ethtool_ksettings_set(struct phylink *,
561 const struct ethtool_link_ksettings *);
562 int phylink_ethtool_nway_reset(struct phylink *);
563 void phylink_ethtool_get_pauseparam(struct phylink *,
564 struct ethtool_pauseparam *);
565 int phylink_ethtool_set_pauseparam(struct phylink *,
566 struct ethtool_pauseparam *);
567 int phylink_get_eee_err(struct phylink *);
568 int phylink_init_eee(struct phylink *, bool);
569 int phylink_ethtool_get_eee(struct phylink *, struct ethtool_eee *);
570 int phylink_ethtool_set_eee(struct phylink *, struct ethtool_eee *);
571 int phylink_mii_ioctl(struct phylink *, struct ifreq *, int);
572 int phylink_speed_down(struct phylink *pl, bool sync);
573 int phylink_speed_up(struct phylink *pl);
575 #define phylink_zero(bm) \
576 bitmap_zero(bm, __ETHTOOL_LINK_MODE_MASK_NBITS)
577 #define __phylink_do_bit(op, bm, mode) \
578 op(ETHTOOL_LINK_MODE_ ## mode ## _BIT, bm)
580 #define phylink_set(bm, mode) __phylink_do_bit(__set_bit, bm, mode)
581 #define phylink_clear(bm, mode) __phylink_do_bit(__clear_bit, bm, mode)
582 #define phylink_test(bm, mode) __phylink_do_bit(test_bit, bm, mode)
584 void phylink_set_port_modes(unsigned long *bits);
585 void phylink_set_10g_modes(unsigned long *mask);
586 void phylink_helper_basex_speed(struct phylink_link_state *state);
588 void phylink_mii_c22_pcs_decode_state(struct phylink_link_state *state,
590 void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs,
591 struct phylink_link_state *state);
592 int phylink_mii_c22_pcs_encode_advertisement(phy_interface_t interface,
593 const unsigned long *advertising);
594 int phylink_mii_c22_pcs_config(struct mdio_device *pcs, unsigned int mode,
595 phy_interface_t interface,
596 const unsigned long *advertising);
597 void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs);
599 void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs,
600 struct phylink_link_state *state);
602 void phylink_decode_usxgmii_word(struct phylink_link_state *state,