1 /* SPDX-License-Identifier: GPL-2.0 */
3 * linux/mii.h: definitions for MII-compatible transceivers
4 * Originally drivers/net/sunhme.h.
6 * Copyright (C) 1996, 1999, 2001 David S. Miller (davem@redhat.com)
8 #ifndef __LINUX_MII_H__
9 #define __LINUX_MII_H__
13 #include <linux/linkmode.h>
14 #include <uapi/linux/mii.h>
24 unsigned int full_duplex
: 1; /* is full duplex? */
25 unsigned int force_media
: 1; /* is autoneg. disabled? */
26 unsigned int supports_gmii
: 1; /* are GMII registers supported? */
28 struct net_device
*dev
;
29 int (*mdio_read
) (struct net_device
*dev
, int phy_id
, int location
);
30 void (*mdio_write
) (struct net_device
*dev
, int phy_id
, int location
, int val
);
33 extern int mii_link_ok (struct mii_if_info
*mii
);
34 extern int mii_nway_restart (struct mii_if_info
*mii
);
35 extern int mii_ethtool_gset(struct mii_if_info
*mii
, struct ethtool_cmd
*ecmd
);
36 extern void mii_ethtool_get_link_ksettings(
37 struct mii_if_info
*mii
, struct ethtool_link_ksettings
*cmd
);
38 extern int mii_ethtool_sset(struct mii_if_info
*mii
, struct ethtool_cmd
*ecmd
);
39 extern int mii_ethtool_set_link_ksettings(
40 struct mii_if_info
*mii
, const struct ethtool_link_ksettings
*cmd
);
41 extern int mii_check_gmii_support(struct mii_if_info
*mii
);
42 extern void mii_check_link (struct mii_if_info
*mii
);
43 extern unsigned int mii_check_media (struct mii_if_info
*mii
,
44 unsigned int ok_to_print
,
45 unsigned int init_media
);
46 extern int generic_mii_ioctl(struct mii_if_info
*mii_if
,
47 struct mii_ioctl_data
*mii_data
, int cmd
,
48 unsigned int *duplex_changed
);
51 static inline struct mii_ioctl_data
*if_mii(struct ifreq
*rq
)
53 return (struct mii_ioctl_data
*) &rq
->ifr_ifru
;
58 * @negotiated: value of MII ANAR and'd with ANLPAR
60 * Given a set of MII abilities, check each bit and returns the
61 * currently supported media, in the priority order defined by
62 * IEEE 802.3u. We use LPA_xxx constants but note this is not the
63 * value of LPA solely, as described above.
65 * The one exception to IEEE 802.3u is that 100baseT4 is placed
66 * between 100T-full and 100T-half. If your phy does not support
67 * 100T4 this is fine. If your phy places 100T4 elsewhere in the
68 * priority order, you will need to roll your own function.
70 static inline unsigned int mii_nway_result (unsigned int negotiated
)
74 if (negotiated
& LPA_100FULL
)
76 else if (negotiated
& LPA_100BASE4
)
78 else if (negotiated
& LPA_100HALF
)
80 else if (negotiated
& LPA_10FULL
)
90 * @duplex_lock: Non-zero if duplex is locked at full
91 * @negotiated: value of MII ANAR and'd with ANLPAR
93 * A small helper function for a common case. Returns one
94 * if the media is operating or locked at full duplex, and
95 * returns zero otherwise.
97 static inline unsigned int mii_duplex (unsigned int duplex_lock
,
98 unsigned int negotiated
)
102 if (mii_nway_result(negotiated
) & LPA_DUPLEX
)
108 * ethtool_adv_to_mii_adv_t
109 * @ethadv: the ethtool advertisement settings
111 * A small helper function that translates ethtool advertisement
112 * settings to phy autonegotiation advertisements for the
113 * MII_ADVERTISE register.
115 static inline u32
ethtool_adv_to_mii_adv_t(u32 ethadv
)
119 if (ethadv
& ADVERTISED_10baseT_Half
)
120 result
|= ADVERTISE_10HALF
;
121 if (ethadv
& ADVERTISED_10baseT_Full
)
122 result
|= ADVERTISE_10FULL
;
123 if (ethadv
& ADVERTISED_100baseT_Half
)
124 result
|= ADVERTISE_100HALF
;
125 if (ethadv
& ADVERTISED_100baseT_Full
)
126 result
|= ADVERTISE_100FULL
;
127 if (ethadv
& ADVERTISED_Pause
)
128 result
|= ADVERTISE_PAUSE_CAP
;
129 if (ethadv
& ADVERTISED_Asym_Pause
)
130 result
|= ADVERTISE_PAUSE_ASYM
;
136 * linkmode_adv_to_mii_adv_t
137 * @advertising: the linkmode advertisement settings
139 * A small helper function that translates linkmode advertisement
140 * settings to phy autonegotiation advertisements for the
141 * MII_ADVERTISE register.
143 static inline u32
linkmode_adv_to_mii_adv_t(unsigned long *advertising
)
147 if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT
, advertising
))
148 result
|= ADVERTISE_10HALF
;
149 if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT
, advertising
))
150 result
|= ADVERTISE_10FULL
;
151 if (linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT
, advertising
))
152 result
|= ADVERTISE_100HALF
;
153 if (linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT
, advertising
))
154 result
|= ADVERTISE_100FULL
;
155 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT
, advertising
))
156 result
|= ADVERTISE_PAUSE_CAP
;
157 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT
, advertising
))
158 result
|= ADVERTISE_PAUSE_ASYM
;
164 * mii_adv_to_ethtool_adv_t
165 * @adv: value of the MII_ADVERTISE register
167 * A small helper function that translates MII_ADVERTISE bits
168 * to ethtool advertisement settings.
170 static inline u32
mii_adv_to_ethtool_adv_t(u32 adv
)
174 if (adv
& ADVERTISE_10HALF
)
175 result
|= ADVERTISED_10baseT_Half
;
176 if (adv
& ADVERTISE_10FULL
)
177 result
|= ADVERTISED_10baseT_Full
;
178 if (adv
& ADVERTISE_100HALF
)
179 result
|= ADVERTISED_100baseT_Half
;
180 if (adv
& ADVERTISE_100FULL
)
181 result
|= ADVERTISED_100baseT_Full
;
182 if (adv
& ADVERTISE_PAUSE_CAP
)
183 result
|= ADVERTISED_Pause
;
184 if (adv
& ADVERTISE_PAUSE_ASYM
)
185 result
|= ADVERTISED_Asym_Pause
;
191 * ethtool_adv_to_mii_ctrl1000_t
192 * @ethadv: the ethtool advertisement settings
194 * A small helper function that translates ethtool advertisement
195 * settings to phy autonegotiation advertisements for the
196 * MII_CTRL1000 register when in 1000T mode.
198 static inline u32
ethtool_adv_to_mii_ctrl1000_t(u32 ethadv
)
202 if (ethadv
& ADVERTISED_1000baseT_Half
)
203 result
|= ADVERTISE_1000HALF
;
204 if (ethadv
& ADVERTISED_1000baseT_Full
)
205 result
|= ADVERTISE_1000FULL
;
211 * linkmode_adv_to_mii_ctrl1000_t
212 * advertising: the linkmode advertisement settings
214 * A small helper function that translates linkmode advertisement
215 * settings to phy autonegotiation advertisements for the
216 * MII_CTRL1000 register when in 1000T mode.
218 static inline u32
linkmode_adv_to_mii_ctrl1000_t(unsigned long *advertising
)
222 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT
,
224 result
|= ADVERTISE_1000HALF
;
225 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT
,
227 result
|= ADVERTISE_1000FULL
;
233 * mii_ctrl1000_to_ethtool_adv_t
234 * @adv: value of the MII_CTRL1000 register
236 * A small helper function that translates MII_CTRL1000
237 * bits, when in 1000Base-T mode, to ethtool
238 * advertisement settings.
240 static inline u32
mii_ctrl1000_to_ethtool_adv_t(u32 adv
)
244 if (adv
& ADVERTISE_1000HALF
)
245 result
|= ADVERTISED_1000baseT_Half
;
246 if (adv
& ADVERTISE_1000FULL
)
247 result
|= ADVERTISED_1000baseT_Full
;
253 * mii_lpa_to_ethtool_lpa_t
254 * @adv: value of the MII_LPA register
256 * A small helper function that translates MII_LPA
257 * bits, when in 1000Base-T mode, to ethtool
258 * LP advertisement settings.
260 static inline u32
mii_lpa_to_ethtool_lpa_t(u32 lpa
)
265 result
|= ADVERTISED_Autoneg
;
267 return result
| mii_adv_to_ethtool_adv_t(lpa
);
271 * mii_stat1000_to_ethtool_lpa_t
272 * @adv: value of the MII_STAT1000 register
274 * A small helper function that translates MII_STAT1000
275 * bits, when in 1000Base-T mode, to ethtool
276 * advertisement settings.
278 static inline u32
mii_stat1000_to_ethtool_lpa_t(u32 lpa
)
282 if (lpa
& LPA_1000HALF
)
283 result
|= ADVERTISED_1000baseT_Half
;
284 if (lpa
& LPA_1000FULL
)
285 result
|= ADVERTISED_1000baseT_Full
;
291 * ethtool_adv_to_mii_adv_x
292 * @ethadv: the ethtool advertisement settings
294 * A small helper function that translates ethtool advertisement
295 * settings to phy autonegotiation advertisements for the
296 * MII_CTRL1000 register when in 1000Base-X mode.
298 static inline u32
ethtool_adv_to_mii_adv_x(u32 ethadv
)
302 if (ethadv
& ADVERTISED_1000baseT_Half
)
303 result
|= ADVERTISE_1000XHALF
;
304 if (ethadv
& ADVERTISED_1000baseT_Full
)
305 result
|= ADVERTISE_1000XFULL
;
306 if (ethadv
& ADVERTISED_Pause
)
307 result
|= ADVERTISE_1000XPAUSE
;
308 if (ethadv
& ADVERTISED_Asym_Pause
)
309 result
|= ADVERTISE_1000XPSE_ASYM
;
315 * mii_adv_to_ethtool_adv_x
316 * @adv: value of the MII_CTRL1000 register
318 * A small helper function that translates MII_CTRL1000
319 * bits, when in 1000Base-X mode, to ethtool
320 * advertisement settings.
322 static inline u32
mii_adv_to_ethtool_adv_x(u32 adv
)
326 if (adv
& ADVERTISE_1000XHALF
)
327 result
|= ADVERTISED_1000baseT_Half
;
328 if (adv
& ADVERTISE_1000XFULL
)
329 result
|= ADVERTISED_1000baseT_Full
;
330 if (adv
& ADVERTISE_1000XPAUSE
)
331 result
|= ADVERTISED_Pause
;
332 if (adv
& ADVERTISE_1000XPSE_ASYM
)
333 result
|= ADVERTISED_Asym_Pause
;
339 * mii_lpa_to_ethtool_lpa_x
340 * @adv: value of the MII_LPA register
342 * A small helper function that translates MII_LPA
343 * bits, when in 1000Base-X mode, to ethtool
344 * LP advertisement settings.
346 static inline u32
mii_lpa_to_ethtool_lpa_x(u32 lpa
)
351 result
|= ADVERTISED_Autoneg
;
353 return result
| mii_adv_to_ethtool_adv_x(lpa
);
357 * mii_adv_to_linkmode_adv_t
358 * @advertising:pointer to destination link mode.
359 * @adv: value of the MII_ADVERTISE register
361 * A small helper function that translates MII_ADVERTISE bits
362 * to linkmode advertisement settings.
364 static inline void mii_adv_to_linkmode_adv_t(unsigned long *advertising
,
367 linkmode_zero(advertising
);
369 if (adv
& ADVERTISE_10HALF
)
370 linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT
,
372 if (adv
& ADVERTISE_10FULL
)
373 linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT
,
375 if (adv
& ADVERTISE_100HALF
)
376 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT
,
378 if (adv
& ADVERTISE_100FULL
)
379 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT
,
381 if (adv
& ADVERTISE_PAUSE_CAP
)
382 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT
, advertising
);
383 if (adv
& ADVERTISE_PAUSE_ASYM
)
384 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT
, advertising
);
388 * ethtool_adv_to_lcl_adv_t
389 * @advertising:pointer to ethtool advertising
391 * A small helper function that translates ethtool advertising to LVL
392 * pause capabilities.
394 static inline u32
ethtool_adv_to_lcl_adv_t(u32 advertising
)
398 if (advertising
& ADVERTISED_Pause
)
399 lcl_adv
|= ADVERTISE_PAUSE_CAP
;
400 if (advertising
& ADVERTISED_Asym_Pause
)
401 lcl_adv
|= ADVERTISE_PAUSE_ASYM
;
407 * mii_advertise_flowctrl - get flow control advertisement flags
408 * @cap: Flow control capabilities (FLOW_CTRL_RX, FLOW_CTRL_TX or both)
410 static inline u16
mii_advertise_flowctrl(int cap
)
414 if (cap
& FLOW_CTRL_RX
)
415 adv
= ADVERTISE_PAUSE_CAP
| ADVERTISE_PAUSE_ASYM
;
416 if (cap
& FLOW_CTRL_TX
)
417 adv
^= ADVERTISE_PAUSE_ASYM
;
423 * mii_resolve_flowctrl_fdx
424 * @lcladv: value of MII ADVERTISE register
425 * @rmtadv: value of MII LPA register
427 * Resolve full duplex flow control as per IEEE 802.3-2005 table 28B-3
429 static inline u8
mii_resolve_flowctrl_fdx(u16 lcladv
, u16 rmtadv
)
433 if (lcladv
& rmtadv
& ADVERTISE_PAUSE_CAP
) {
434 cap
= FLOW_CTRL_TX
| FLOW_CTRL_RX
;
435 } else if (lcladv
& rmtadv
& ADVERTISE_PAUSE_ASYM
) {
436 if (lcladv
& ADVERTISE_PAUSE_CAP
)
438 else if (rmtadv
& ADVERTISE_PAUSE_CAP
)
445 #endif /* __LINUX_MII_H__ */