summaryrefslogtreecommitdiff
path: root/include/linux/phylink.h
blob: 3f8d37ec55030b10512373f88bf2f76af44f502b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
#ifndef NETDEV_PCS_H
#define NETDEV_PCS_H

#include <linux/phy.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>

struct device_node;
struct ethtool_cmd;
struct fwnode_handle;
struct net_device;

enum {
	MLO_PAUSE_NONE,
	MLO_PAUSE_RX = BIT(0),
	MLO_PAUSE_TX = BIT(1),
	MLO_PAUSE_TXRX_MASK = MLO_PAUSE_TX | MLO_PAUSE_RX,
	MLO_PAUSE_AN = BIT(2),

	MLO_AN_PHY = 0,	/* Conventional PHY */
	MLO_AN_FIXED,	/* Fixed-link mode */
	MLO_AN_INBAND,	/* In-band protocol */
};

static inline bool phylink_autoneg_inband(unsigned int mode)
{
	return mode == MLO_AN_INBAND;
}

/**
 * struct phylink_link_state - link state structure
 * @advertising: ethtool bitmask containing advertised link modes
 * @lp_advertising: ethtool bitmask containing link partner advertised link
 *   modes
 * @interface: link &typedef phy_interface_t mode
 * @speed: link speed, one of the SPEED_* constants.
 * @duplex: link duplex mode, one of DUPLEX_* constants.
 * @pause: link pause state, described by MLO_PAUSE_* constants.
 * @link: true if the link is up.
 * @an_enabled: true if autonegotiation is enabled/desired.
 * @an_complete: true if autonegotiation has completed.
 */
struct phylink_link_state {
	__ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
	__ETHTOOL_DECLARE_LINK_MODE_MASK(lp_advertising);
	phy_interface_t interface;
	int speed;
	int duplex;
	int pause;
	unsigned int link:1;
	unsigned int an_enabled:1;
	unsigned int an_complete:1;
};

enum phylink_op_type {
	PHYLINK_NETDEV = 0,
	PHYLINK_DEV,
};

/**
 * struct phylink_config - PHYLINK configuration structure
 * @dev: a pointer to a struct device associated with the MAC
 * @type: operation type of PHYLINK instance
 * @pcs_poll: MAC PCS cannot provide link change interrupt
 */
struct phylink_config {
	struct device *dev;
	enum phylink_op_type type;
	bool pcs_poll;
};

/**
 * struct phylink_mac_ops - MAC operations structure.
 * @validate: Validate and update the link configuration.
 * @mac_pcs_get_state: Read the current link state from the hardware.
 * @mac_config: configure the MAC for the selected mode and state.
 * @mac_an_restart: restart 802.3z BaseX autonegotiation.
 * @mac_link_down: take the link down.
 * @mac_link_up: allow the link to come up.
 *
 * The individual methods are described more fully below.
 */
struct phylink_mac_ops {
	void (*validate)(struct phylink_config *config,
			 unsigned long *supported,
			 struct phylink_link_state *state);
	void (*mac_pcs_get_state)(struct phylink_config *config,
				  struct phylink_link_state *state);
	void (*mac_config)(struct phylink_config *config, unsigned int mode,
			   const struct phylink_link_state *state);
	void (*mac_an_restart)(struct phylink_config *config);
	void (*mac_link_down)(struct phylink_config *config, unsigned int mode,
			      phy_interface_t interface);
	void (*mac_link_up)(struct phylink_config *config,
			    struct phy_device *phy, unsigned int mode,
			    phy_interface_t interface, int speed, int duplex,
			    bool tx_pause, bool rx_pause);
};

#if 0 /* For kernel-doc purposes only. */
/**
 * validate - Validate and update the link configuration
 * @config: a pointer to a &struct phylink_config.
 * @supported: ethtool bitmask for supported link modes.
 * @state: a pointer to a &struct phylink_link_state.
 *
 * Clear bits in the @supported and @state->advertising masks that
 * are not supportable by the MAC.
 *
 * Note that the PHY may be able to transform from one connection
 * technology to another, so, eg, don't clear 1000BaseX just
 * because the MAC is unable to BaseX mode. This is more about
 * clearing unsupported speeds and duplex settings. The port modes
 * should not be cleared; phylink_set_port_modes() will help with this.
 *
 * If the @state->interface mode is %PHY_INTERFACE_MODE_1000BASEX
 * or %PHY_INTERFACE_MODE_2500BASEX, select the appropriate mode
 * based on @state->advertising and/or @state->speed and update
 * @state->interface accordingly. See phylink_helper_basex_speed().
 *
 * When @state->interface is %PHY_INTERFACE_MODE_NA, phylink expects the
 * MAC driver to return all supported link modes.
 *
 * If the @state->interface mode is not supported, then the @supported
 * mask must be cleared.
 */
void validate(struct phylink_config *config, unsigned long *supported,
	      struct phylink_link_state *state);

/**
 * mac_pcs_get_state() - Read the current inband link state from the hardware
 * @config: a pointer to a &struct phylink_config.
 * @state: a pointer to a &struct phylink_link_state.
 *
 * Read the current inband link state from the MAC PCS, reporting the
 * current speed in @state->speed, duplex mode in @state->duplex, pause
 * mode in @state->pause using the %MLO_PAUSE_RX and %MLO_PAUSE_TX bits,
 * negotiation completion state in @state->an_complete, and link up state
 * in @state->link. If possible, @state->lp_advertising should also be
 * populated.
 */
void mac_pcs_get_state(struct phylink_config *config,
		       struct phylink_link_state *state);

/**
 * mac_config() - configure the MAC for the selected mode and state
 * @config: a pointer to a &struct phylink_config.
 * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND.
 * @state: a pointer to a &struct phylink_link_state.
 *
 * Note - not all members of @state are valid.  In particular,
 * @state->lp_advertising, @state->link, @state->an_complete are never
 * guaranteed to be correct, and so any mac_config() implementation must
 * never reference these fields.
 *
 * (this requires a rewrite - please refer to mac_link_up() for situations
 *  where the PCS and MAC are not tightly integrated.)
 *
 * In all negotiation modes, as defined by @mode, @state->pause indicates the
 * pause settings which should be applied as follows. If %MLO_PAUSE_AN is not
 * set, %MLO_PAUSE_TX and %MLO_PAUSE_RX indicate whether the MAC should send
 * pause frames and/or act on received pause frames respectively. Otherwise,
 * the results of in-band negotiation/status from the MAC PCS should be used
 * to control the MAC pause mode settings.
 *
 * The action performed depends on the currently selected mode:
 *
 * %MLO_AN_FIXED, %MLO_AN_PHY:
 *   Configure for non-inband negotiation mode, where the link settings
 *   are completely communicated via mac_link_up().  The physical link
 *   protocol from the MAC is specified by @state->interface.
 *
 *   @state->advertising may be used, but is not required.
 *
 *   Older drivers (prior to the mac_link_up() change) may use @state->speed,
 *   @state->duplex and @state->pause to configure the MAC, but this is
 *   deprecated; such drivers should be converted to use mac_link_up().
 *
 *   Other members of @state must be ignored.
 *
 *   Valid state members: interface, advertising.
 *   Deprecated state members: speed, duplex, pause.
 *
 * %MLO_AN_INBAND:
 *   place the link in an inband negotiation mode (such as 802.3z
 *   1000base-X or Cisco SGMII mode depending on the @state->interface
 *   mode). In both cases, link state management (whether the link
 *   is up or not) is performed by the MAC, and reported via the
 *   mac_pcs_get_state() callback. Changes in link state must be made
 *   by calling phylink_mac_change().
 *
 *   Interface mode specific details are mentioned below.
 *
 *   If in 802.3z mode, the link speed is fixed, dependent on the
 *   @state->interface. Duplex and pause modes are negotiated via
 *   the in-band configuration word. Advertised pause modes are set
 *   according to the @state->an_enabled and @state->advertising
 *   flags. Beware of MACs which only support full duplex at gigabit
 *   and higher speeds.
 *
 *   If in Cisco SGMII mode, the link speed and duplex mode are passed
 *   in the serial bitstream 16-bit configuration word, and the MAC
 *   should be configured to read these bits and acknowledge the
 *   configuration word. Nothing is advertised by the MAC. The MAC is
 *   responsible for reading the configuration word and configuring
 *   itself accordingly.
 *
 *   Valid state members: interface, an_enabled, pause, advertising.
 *
 * Implementations are expected to update the MAC to reflect the
 * requested settings - i.o.w., if nothing has changed between two
 * calls, no action is expected.  If only flow control settings have
 * changed, flow control should be updated *without* taking the link
 * down.  This "update" behaviour is critical to avoid bouncing the
 * link up status.
 */
void mac_config(struct phylink_config *config, unsigned int mode,
		const struct phylink_link_state *state);

/**
 * mac_an_restart() - restart 802.3z BaseX autonegotiation
 * @config: a pointer to a &struct phylink_config.
 */
void mac_an_restart(struct phylink_config *config);

/**
 * mac_link_down() - take the link down
 * @config: a pointer to a &struct phylink_config.
 * @mode: link autonegotiation mode
 * @interface: link &typedef phy_interface_t mode
 *
 * If @mode is not an in-band negotiation mode (as defined by
 * phylink_autoneg_inband()), force the link down and disable any
 * Energy Efficient Ethernet MAC configuration. Interface type
 * selection must be done in mac_config().
 */
void mac_link_down(struct phylink_config *config, unsigned int mode,
		   phy_interface_t interface);

/**
 * mac_link_up() - allow the link to come up
 * @config: a pointer to a &struct phylink_config.
 * @phy: any attached phy
 * @mode: link autonegotiation mode
 * @interface: link &typedef phy_interface_t mode
 * @speed: link speed
 * @duplex: link duplex
 * @tx_pause: link transmit pause enablement status
 * @rx_pause: link receive pause enablement status
 *
 * Configure the MAC for an established link.
 *
 * @speed, @duplex, @tx_pause and @rx_pause indicate the finalised link
 * settings, and should be used to configure the MAC block appropriately
 * where these settings are not automatically conveyed from the PCS block,
 * or if in-band negotiation (as defined by phylink_autoneg_inband(@mode))
 * is disabled.
 *
 * Note that when 802.3z in-band negotiation is in use, it is possible
 * that the user wishes to override the pause settings, and this should
 * be allowed when considering the implementation of this method.
 *
 * If in-band negotiation mode is disabled, allow the link to come up. If
 * @phy is non-%NULL, configure Energy Efficient Ethernet by calling
 * phy_init_eee() and perform appropriate MAC configuration for EEE.
 * Interface type selection must be done in mac_config().
 */
void mac_link_up(struct phylink_config *config, struct phy_device *phy,
		 unsigned int mode, phy_interface_t interface,
		 int speed, int duplex, bool tx_pause, bool rx_pause);
#endif

/**
 * struct phylink_pcs_ops - MAC PCS operations structure.
 * @pcs_get_state: read the current MAC PCS link state from the hardware.
 * @pcs_config: configure the MAC PCS for the selected mode and state.
 * @pcs_an_restart: restart 802.3z BaseX autonegotiation.
 * @pcs_link_up: program the PCS for the resolved link configuration
 *               (where necessary).
 */
struct phylink_pcs_ops {
	void (*pcs_get_state)(struct phylink_config *config,
			      struct phylink_link_state *state);
	int (*pcs_config)(struct phylink_config *config, unsigned int mode,
			  phy_interface_t interface,
			  const unsigned long *advertising);
	void (*pcs_an_restart)(struct phylink_config *config);
	void (*pcs_link_up)(struct phylink_config *config, unsigned int mode,
			    phy_interface_t interface, int speed, int duplex);
};

#if 0 /* For kernel-doc purposes only. */
/**
 * pcs_get_state() - Read the current inband link state from the hardware
 * @config: a pointer to a &struct phylink_config.
 * @state: a pointer to a &struct phylink_link_state.
 *
 * Read the current inband link state from the MAC PCS, reporting the
 * current speed in @state->speed, duplex mode in @state->duplex, pause
 * mode in @state->pause using the %MLO_PAUSE_RX and %MLO_PAUSE_TX bits,
 * negotiation completion state in @state->an_complete, and link up state
 * in @state->link. If possible, @state->lp_advertising should also be
 * populated.
 *
 * When present, this overrides mac_pcs_get_state() in &struct
 * phylink_mac_ops.
 */
void pcs_get_state(struct phylink_config *config,
		   struct phylink_link_state *state);

/**
 * pcs_config() - Configure the PCS mode and advertisement
 * @config: a pointer to a &struct phylink_config.
 * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND.
 * @interface: interface mode to be used
 * @advertising: adertisement ethtool link mode mask
 *
 * Configure the PCS for the operating mode, the interface mode, and set
 * the advertisement mask.
 *
 * When operating in %MLO_AN_INBAND, inband should always be enabled,
 * otherwise inband should be disabled.
 *
 * For SGMII, there is no advertisement from the MAC side, the PCS should
 * be programmed to acknowledge the inband word from the PHY.
 *
 * For 1000BASE-X, the advertisement should be programmed into the PCS.
 *
 * For most 10GBASE-R, there is no advertisement.
 */
int (*pcs_config)(struct phylink_config *config, unsigned int mode,
		  phy_interface_t interface, const unsigned long *advertising);

/**
 * pcs_an_restart() - restart 802.3z BaseX autonegotiation
 * @config: a pointer to a &struct phylink_config.
 *
 * When PCS ops are present, this overrides mac_an_restart() in &struct
 * phylink_mac_ops.
 */
void (*pcs_an_restart)(struct phylink_config *config);

/**
 * pcs_link_up() - program the PCS for the resolved link configuration
 * @config: a pointer to a &struct phylink_config.
 * @mode: link autonegotiation mode
 * @interface: link &typedef phy_interface_t mode
 * @speed: link speed
 * @duplex: link duplex
 *
 * This call will be made just before mac_link_up() to inform the PCS of
 * the resolved link parameters. For example, a PCS operating in SGMII
 * mode without in-band AN needs to be manually configured for the link
 * and duplex setting. Otherwise, this should be a no-op.
 */
void (*pcs_link_up)(struct phylink_config *config, unsigned int mode,
		    phy_interface_t interface, int speed, int duplex);
#endif

struct phylink *phylink_create(struct phylink_config *, struct fwnode_handle *,
			       phy_interface_t iface,
			       const struct phylink_mac_ops *mac_ops);
void phylink_add_pcs(struct phylink *, const struct phylink_pcs_ops *ops);
void phylink_destroy(struct phylink *);

int phylink_connect_phy(struct phylink *, struct phy_device *);
int phylink_of_phy_connect(struct phylink *, struct device_node *, u32 flags);
void phylink_disconnect_phy(struct phylink *);
int phylink_fixed_state_cb(struct phylink *,
			   void (*cb)(struct net_device *dev,
				      struct phylink_link_state *));

void phylink_mac_change(struct phylink *, bool up);

void phylink_start(struct phylink *);
void phylink_stop(struct phylink *);

void phylink_ethtool_get_wol(struct phylink *, struct ethtool_wolinfo *);
int phylink_ethtool_set_wol(struct phylink *, struct ethtool_wolinfo *);

int phylink_ethtool_ksettings_get(struct phylink *,
				  struct ethtool_link_ksettings *);
int phylink_ethtool_ksettings_set(struct phylink *,
				  const struct ethtool_link_ksettings *);
int phylink_ethtool_nway_reset(struct phylink *);
void phylink_ethtool_get_pauseparam(struct phylink *,
				    struct ethtool_pauseparam *);
int phylink_ethtool_set_pauseparam(struct phylink *,
				   struct ethtool_pauseparam *);
int phylink_get_eee_err(struct phylink *);
int phylink_init_eee(struct phylink *, bool);
int phylink_ethtool_get_eee(struct phylink *, struct ethtool_eee *);
int phylink_ethtool_set_eee(struct phylink *, struct ethtool_eee *);
int phylink_mii_ioctl(struct phylink *, struct ifreq *, int);

#define phylink_zero(bm) \
	bitmap_zero(bm, __ETHTOOL_LINK_MODE_MASK_NBITS)
#define __phylink_do_bit(op, bm, mode) \
	op(ETHTOOL_LINK_MODE_ ## mode ## _BIT, bm)

#define phylink_set(bm, mode)	__phylink_do_bit(__set_bit, bm, mode)
#define phylink_clear(bm, mode)	__phylink_do_bit(__clear_bit, bm, mode)
#define phylink_test(bm, mode)	__phylink_do_bit(test_bit, bm, mode)

void phylink_set_port_modes(unsigned long *bits);
void phylink_helper_basex_speed(struct phylink_link_state *state);

void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs,
				   struct phylink_link_state *state);
int phylink_mii_c22_pcs_set_advertisement(struct mdio_device *pcs,
					  phy_interface_t interface,
					  const unsigned long *advertising);
void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs);

void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs,
				   struct phylink_link_state *state);
#endif