]>
Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* |
3 | * linux/mii.h: definitions for MII-compatible transceivers | |
4 | * Originally drivers/net/sunhme.h. | |
5 | * | |
6 | * Copyright (C) 1996, 1999, 2001 David S. Miller (davem@redhat.com) | |
7 | */ | |
1da177e4 LT |
8 | #ifndef __LINUX_MII_H__ |
9 | #define __LINUX_MII_H__ | |
10 | ||
c3ce7e20 DW |
11 | |
12 | #include <linux/if.h> | |
b31cdffa | 13 | #include <linux/linkmode.h> |
607ca46e | 14 | #include <uapi/linux/mii.h> |
c3ce7e20 DW |
15 | |
16 | struct ethtool_cmd; | |
17 | ||
1da177e4 LT |
18 | struct mii_if_info { |
19 | int phy_id; | |
20 | int advertising; | |
21 | int phy_id_mask; | |
22 | int reg_num_mask; | |
23 | ||
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? */ | |
27 | ||
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); | |
31 | }; | |
32 | ||
1da177e4 LT |
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); | |
82c01a84 | 36 | extern void mii_ethtool_get_link_ksettings( |
bc8ee596 | 37 | struct mii_if_info *mii, struct ethtool_link_ksettings *cmd); |
1da177e4 | 38 | extern int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd); |
bc8ee596 PR |
39 | extern int mii_ethtool_set_link_ksettings( |
40 | struct mii_if_info *mii, const struct ethtool_link_ksettings *cmd); | |
43ec6e95 | 41 | extern int mii_check_gmii_support(struct mii_if_info *mii); |
1da177e4 LT |
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, | |
c44f7eb4 | 47 | struct mii_ioctl_data *mii_data, int cmd, |
1da177e4 LT |
48 | unsigned int *duplex_changed); |
49 | ||
50 | ||
1da177e4 LT |
51 | static inline struct mii_ioctl_data *if_mii(struct ifreq *rq) |
52 | { | |
53 | return (struct mii_ioctl_data *) &rq->ifr_ifru; | |
54 | } | |
55 | ||
1da177e4 LT |
56 | /** |
57 | * mii_nway_result | |
58 | * @negotiated: value of MII ANAR and'd with ANLPAR | |
59 | * | |
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. | |
64 | * | |
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. | |
69 | */ | |
70 | static inline unsigned int mii_nway_result (unsigned int negotiated) | |
71 | { | |
72 | unsigned int ret; | |
73 | ||
74 | if (negotiated & LPA_100FULL) | |
75 | ret = LPA_100FULL; | |
76 | else if (negotiated & LPA_100BASE4) | |
77 | ret = LPA_100BASE4; | |
78 | else if (negotiated & LPA_100HALF) | |
79 | ret = LPA_100HALF; | |
80 | else if (negotiated & LPA_10FULL) | |
81 | ret = LPA_10FULL; | |
82 | else | |
83 | ret = LPA_10HALF; | |
84 | ||
85 | return ret; | |
86 | } | |
87 | ||
88 | /** | |
89 | * mii_duplex | |
90 | * @duplex_lock: Non-zero if duplex is locked at full | |
91 | * @negotiated: value of MII ANAR and'd with ANLPAR | |
92 | * | |
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. | |
96 | */ | |
97 | static inline unsigned int mii_duplex (unsigned int duplex_lock, | |
98 | unsigned int negotiated) | |
99 | { | |
100 | if (duplex_lock) | |
101 | return 1; | |
102 | if (mii_nway_result(negotiated) & LPA_DUPLEX) | |
103 | return 1; | |
104 | return 0; | |
105 | } | |
106 | ||
28011cf1 | 107 | /** |
37f07023 | 108 | * ethtool_adv_to_mii_adv_t |
28011cf1 MC |
109 | * @ethadv: the ethtool advertisement settings |
110 | * | |
111 | * A small helper function that translates ethtool advertisement | |
112 | * settings to phy autonegotiation advertisements for the | |
113 | * MII_ADVERTISE register. | |
114 | */ | |
37f07023 | 115 | static inline u32 ethtool_adv_to_mii_adv_t(u32 ethadv) |
28011cf1 MC |
116 | { |
117 | u32 result = 0; | |
118 | ||
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; | |
131 | ||
132 | return result; | |
133 | } | |
134 | ||
f954a04e AL |
135 | /** |
136 | * linkmode_adv_to_mii_adv_t | |
137 | * @advertising: the linkmode advertisement settings | |
138 | * | |
139 | * A small helper function that translates linkmode advertisement | |
140 | * settings to phy autonegotiation advertisements for the | |
141 | * MII_ADVERTISE register. | |
142 | */ | |
143 | static inline u32 linkmode_adv_to_mii_adv_t(unsigned long *advertising) | |
144 | { | |
145 | u32 result = 0; | |
146 | ||
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; | |
159 | ||
160 | return result; | |
161 | } | |
162 | ||
28011cf1 | 163 | /** |
37f07023 | 164 | * mii_adv_to_ethtool_adv_t |
28011cf1 MC |
165 | * @adv: value of the MII_ADVERTISE register |
166 | * | |
167 | * A small helper function that translates MII_ADVERTISE bits | |
168 | * to ethtool advertisement settings. | |
169 | */ | |
37f07023 | 170 | static inline u32 mii_adv_to_ethtool_adv_t(u32 adv) |
28011cf1 MC |
171 | { |
172 | u32 result = 0; | |
173 | ||
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; | |
186 | ||
187 | return result; | |
188 | } | |
189 | ||
190 | /** | |
37f07023 | 191 | * ethtool_adv_to_mii_ctrl1000_t |
28011cf1 MC |
192 | * @ethadv: the ethtool advertisement settings |
193 | * | |
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. | |
197 | */ | |
37f07023 | 198 | static inline u32 ethtool_adv_to_mii_ctrl1000_t(u32 ethadv) |
28011cf1 MC |
199 | { |
200 | u32 result = 0; | |
201 | ||
202 | if (ethadv & ADVERTISED_1000baseT_Half) | |
203 | result |= ADVERTISE_1000HALF; | |
204 | if (ethadv & ADVERTISED_1000baseT_Full) | |
205 | result |= ADVERTISE_1000FULL; | |
206 | ||
207 | return result; | |
208 | } | |
209 | ||
f954a04e AL |
210 | /** |
211 | * linkmode_adv_to_mii_ctrl1000_t | |
fe191914 | 212 | * @advertising: the linkmode advertisement settings |
f954a04e AL |
213 | * |
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. | |
217 | */ | |
218 | static inline u32 linkmode_adv_to_mii_ctrl1000_t(unsigned long *advertising) | |
219 | { | |
220 | u32 result = 0; | |
221 | ||
222 | if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, | |
223 | advertising)) | |
224 | result |= ADVERTISE_1000HALF; | |
225 | if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, | |
226 | advertising)) | |
227 | result |= ADVERTISE_1000FULL; | |
228 | ||
229 | return result; | |
230 | } | |
231 | ||
28011cf1 | 232 | /** |
37f07023 | 233 | * mii_ctrl1000_to_ethtool_adv_t |
28011cf1 MC |
234 | * @adv: value of the MII_CTRL1000 register |
235 | * | |
236 | * A small helper function that translates MII_CTRL1000 | |
237 | * bits, when in 1000Base-T mode, to ethtool | |
238 | * advertisement settings. | |
239 | */ | |
37f07023 | 240 | static inline u32 mii_ctrl1000_to_ethtool_adv_t(u32 adv) |
28011cf1 MC |
241 | { |
242 | u32 result = 0; | |
243 | ||
244 | if (adv & ADVERTISE_1000HALF) | |
245 | result |= ADVERTISED_1000baseT_Half; | |
246 | if (adv & ADVERTISE_1000FULL) | |
247 | result |= ADVERTISED_1000baseT_Full; | |
248 | ||
249 | return result; | |
250 | } | |
251 | ||
37f07023 MC |
252 | /** |
253 | * mii_lpa_to_ethtool_lpa_t | |
254 | * @adv: value of the MII_LPA register | |
255 | * | |
256 | * A small helper function that translates MII_LPA | |
257 | * bits, when in 1000Base-T mode, to ethtool | |
258 | * LP advertisement settings. | |
259 | */ | |
260 | static inline u32 mii_lpa_to_ethtool_lpa_t(u32 lpa) | |
261 | { | |
262 | u32 result = 0; | |
263 | ||
264 | if (lpa & LPA_LPACK) | |
265 | result |= ADVERTISED_Autoneg; | |
266 | ||
267 | return result | mii_adv_to_ethtool_adv_t(lpa); | |
268 | } | |
28011cf1 MC |
269 | |
270 | /** | |
37f07023 | 271 | * mii_stat1000_to_ethtool_lpa_t |
28011cf1 MC |
272 | * @adv: value of the MII_STAT1000 register |
273 | * | |
274 | * A small helper function that translates MII_STAT1000 | |
275 | * bits, when in 1000Base-T mode, to ethtool | |
276 | * advertisement settings. | |
277 | */ | |
37f07023 | 278 | static inline u32 mii_stat1000_to_ethtool_lpa_t(u32 lpa) |
28011cf1 MC |
279 | { |
280 | u32 result = 0; | |
281 | ||
282 | if (lpa & LPA_1000HALF) | |
283 | result |= ADVERTISED_1000baseT_Half; | |
284 | if (lpa & LPA_1000FULL) | |
285 | result |= ADVERTISED_1000baseT_Full; | |
286 | ||
287 | return result; | |
288 | } | |
289 | ||
c0ec3c27 | 290 | /** |
78a24df3 | 291 | * mii_stat1000_mod_linkmode_lpa_t |
c0ec3c27 AL |
292 | * @advertising: target the linkmode advertisement settings |
293 | * @adv: value of the MII_STAT1000 register | |
294 | * | |
295 | * A small helper function that translates MII_STAT1000 bits, when in | |
78a24df3 AL |
296 | * 1000Base-T mode, to linkmode advertisement settings. Other bits in |
297 | * advertising are not changes. | |
c0ec3c27 | 298 | */ |
78a24df3 AL |
299 | static inline void mii_stat1000_mod_linkmode_lpa_t(unsigned long *advertising, |
300 | u32 lpa) | |
c0ec3c27 | 301 | { |
78a24df3 AL |
302 | linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, |
303 | advertising, lpa & LPA_1000HALF); | |
304 | ||
305 | linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, | |
306 | advertising, lpa & LPA_1000FULL); | |
c0ec3c27 AL |
307 | } |
308 | ||
28011cf1 | 309 | /** |
37f07023 | 310 | * ethtool_adv_to_mii_adv_x |
28011cf1 MC |
311 | * @ethadv: the ethtool advertisement settings |
312 | * | |
313 | * A small helper function that translates ethtool advertisement | |
314 | * settings to phy autonegotiation advertisements for the | |
315 | * MII_CTRL1000 register when in 1000Base-X mode. | |
316 | */ | |
37f07023 | 317 | static inline u32 ethtool_adv_to_mii_adv_x(u32 ethadv) |
28011cf1 MC |
318 | { |
319 | u32 result = 0; | |
320 | ||
321 | if (ethadv & ADVERTISED_1000baseT_Half) | |
322 | result |= ADVERTISE_1000XHALF; | |
323 | if (ethadv & ADVERTISED_1000baseT_Full) | |
324 | result |= ADVERTISE_1000XFULL; | |
325 | if (ethadv & ADVERTISED_Pause) | |
326 | result |= ADVERTISE_1000XPAUSE; | |
327 | if (ethadv & ADVERTISED_Asym_Pause) | |
328 | result |= ADVERTISE_1000XPSE_ASYM; | |
329 | ||
330 | return result; | |
331 | } | |
332 | ||
333 | /** | |
37f07023 | 334 | * mii_adv_to_ethtool_adv_x |
28011cf1 MC |
335 | * @adv: value of the MII_CTRL1000 register |
336 | * | |
337 | * A small helper function that translates MII_CTRL1000 | |
338 | * bits, when in 1000Base-X mode, to ethtool | |
339 | * advertisement settings. | |
340 | */ | |
37f07023 | 341 | static inline u32 mii_adv_to_ethtool_adv_x(u32 adv) |
28011cf1 MC |
342 | { |
343 | u32 result = 0; | |
344 | ||
345 | if (adv & ADVERTISE_1000XHALF) | |
346 | result |= ADVERTISED_1000baseT_Half; | |
347 | if (adv & ADVERTISE_1000XFULL) | |
348 | result |= ADVERTISED_1000baseT_Full; | |
349 | if (adv & ADVERTISE_1000XPAUSE) | |
350 | result |= ADVERTISED_Pause; | |
351 | if (adv & ADVERTISE_1000XPSE_ASYM) | |
352 | result |= ADVERTISED_Asym_Pause; | |
353 | ||
354 | return result; | |
355 | } | |
356 | ||
37f07023 MC |
357 | /** |
358 | * mii_lpa_to_ethtool_lpa_x | |
359 | * @adv: value of the MII_LPA register | |
360 | * | |
361 | * A small helper function that translates MII_LPA | |
362 | * bits, when in 1000Base-X mode, to ethtool | |
363 | * LP advertisement settings. | |
364 | */ | |
365 | static inline u32 mii_lpa_to_ethtool_lpa_x(u32 lpa) | |
366 | { | |
367 | u32 result = 0; | |
368 | ||
369 | if (lpa & LPA_LPACK) | |
370 | result |= ADVERTISED_Autoneg; | |
371 | ||
372 | return result | mii_adv_to_ethtool_adv_x(lpa); | |
373 | } | |
374 | ||
d3351931 AL |
375 | /** |
376 | * mii_adv_mod_linkmode_adv_t | |
377 | * @advertising:pointer to destination link mode. | |
378 | * @adv: value of the MII_ADVERTISE register | |
379 | * | |
380 | * A small helper function that translates MII_ADVERTISE bits to | |
381 | * linkmode advertisement settings. Leaves other bits unchanged. | |
382 | */ | |
383 | static inline void mii_adv_mod_linkmode_adv_t(unsigned long *advertising, | |
384 | u32 adv) | |
385 | { | |
386 | linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, | |
387 | advertising, adv & ADVERTISE_10HALF); | |
388 | ||
389 | linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, | |
390 | advertising, adv & ADVERTISE_10FULL); | |
391 | ||
392 | linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, | |
393 | advertising, adv & ADVERTISE_100HALF); | |
394 | ||
395 | linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, | |
396 | advertising, adv & ADVERTISE_100FULL); | |
397 | ||
398 | linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, advertising, | |
399 | adv & ADVERTISE_PAUSE_CAP); | |
400 | ||
401 | linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, | |
402 | advertising, adv & ADVERTISE_PAUSE_ASYM); | |
403 | } | |
404 | ||
edc7ccbb AL |
405 | /** |
406 | * mii_adv_to_linkmode_adv_t | |
407 | * @advertising:pointer to destination link mode. | |
408 | * @adv: value of the MII_ADVERTISE register | |
409 | * | |
410 | * A small helper function that translates MII_ADVERTISE bits | |
5f15eed2 AL |
411 | * to linkmode advertisement settings. Clears the old value |
412 | * of advertising. | |
edc7ccbb AL |
413 | */ |
414 | static inline void mii_adv_to_linkmode_adv_t(unsigned long *advertising, | |
415 | u32 adv) | |
416 | { | |
417 | linkmode_zero(advertising); | |
418 | ||
d3351931 | 419 | mii_adv_mod_linkmode_adv_t(advertising, adv); |
edc7ccbb AL |
420 | } |
421 | ||
c0ec3c27 AL |
422 | /** |
423 | * mii_lpa_to_linkmode_lpa_t | |
424 | * @adv: value of the MII_LPA register | |
425 | * | |
426 | * A small helper function that translates MII_LPA bits, when in | |
5f15eed2 AL |
427 | * 1000Base-T mode, to linkmode LP advertisement settings. Clears the |
428 | * old value of advertising | |
c0ec3c27 AL |
429 | */ |
430 | static inline void mii_lpa_to_linkmode_lpa_t(unsigned long *lp_advertising, | |
431 | u32 lpa) | |
432 | { | |
5f15eed2 AL |
433 | mii_adv_to_linkmode_adv_t(lp_advertising, lpa); |
434 | ||
c0ec3c27 AL |
435 | if (lpa & LPA_LPACK) |
436 | linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, | |
437 | lp_advertising); | |
438 | ||
c0ec3c27 AL |
439 | } |
440 | ||
d3351931 AL |
441 | /** |
442 | * mii_lpa_mod_linkmode_lpa_t | |
443 | * @adv: value of the MII_LPA register | |
444 | * | |
445 | * A small helper function that translates MII_LPA bits, when in | |
446 | * 1000Base-T mode, to linkmode LP advertisement settings. Leaves | |
447 | * other bits unchanged. | |
448 | */ | |
449 | static inline void mii_lpa_mod_linkmode_lpa_t(unsigned long *lp_advertising, | |
450 | u32 lpa) | |
451 | { | |
452 | mii_adv_mod_linkmode_adv_t(lp_advertising, lpa); | |
453 | ||
6dbd0090 AL |
454 | linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, |
455 | lp_advertising, lpa & LPA_LPACK); | |
d3351931 AL |
456 | } |
457 | ||
5f991f7b | 458 | /** |
3c1bcc86 AL |
459 | * linkmode_adv_to_lcl_adv_t |
460 | * @advertising:pointer to linkmode advertising | |
5f991f7b | 461 | * |
3c1bcc86 | 462 | * A small helper function that translates linkmode advertising to LVL |
5f991f7b AL |
463 | * pause capabilities. |
464 | */ | |
3c1bcc86 | 465 | static inline u32 linkmode_adv_to_lcl_adv_t(unsigned long *advertising) |
5f991f7b AL |
466 | { |
467 | u32 lcl_adv = 0; | |
468 | ||
3c1bcc86 AL |
469 | if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, |
470 | advertising)) | |
5f991f7b | 471 | lcl_adv |= ADVERTISE_PAUSE_CAP; |
3c1bcc86 AL |
472 | if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, |
473 | advertising)) | |
5f991f7b AL |
474 | lcl_adv |= ADVERTISE_PAUSE_ASYM; |
475 | ||
476 | return lcl_adv; | |
477 | } | |
478 | ||
a8c30832 BH |
479 | /** |
480 | * mii_advertise_flowctrl - get flow control advertisement flags | |
481 | * @cap: Flow control capabilities (FLOW_CTRL_RX, FLOW_CTRL_TX or both) | |
482 | */ | |
483 | static inline u16 mii_advertise_flowctrl(int cap) | |
484 | { | |
485 | u16 adv = 0; | |
486 | ||
487 | if (cap & FLOW_CTRL_RX) | |
488 | adv = ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM; | |
489 | if (cap & FLOW_CTRL_TX) | |
490 | adv ^= ADVERTISE_PAUSE_ASYM; | |
491 | ||
492 | return adv; | |
493 | } | |
494 | ||
bc02ff95 SG |
495 | /** |
496 | * mii_resolve_flowctrl_fdx | |
497 | * @lcladv: value of MII ADVERTISE register | |
498 | * @rmtadv: value of MII LPA register | |
499 | * | |
500 | * Resolve full duplex flow control as per IEEE 802.3-2005 table 28B-3 | |
501 | */ | |
502 | static inline u8 mii_resolve_flowctrl_fdx(u16 lcladv, u16 rmtadv) | |
503 | { | |
504 | u8 cap = 0; | |
505 | ||
44c22ee9 BH |
506 | if (lcladv & rmtadv & ADVERTISE_PAUSE_CAP) { |
507 | cap = FLOW_CTRL_TX | FLOW_CTRL_RX; | |
508 | } else if (lcladv & rmtadv & ADVERTISE_PAUSE_ASYM) { | |
509 | if (lcladv & ADVERTISE_PAUSE_CAP) | |
510 | cap = FLOW_CTRL_RX; | |
511 | else if (rmtadv & ADVERTISE_PAUSE_CAP) | |
bc02ff95 SG |
512 | cap = FLOW_CTRL_TX; |
513 | } | |
514 | ||
515 | return cap; | |
516 | } | |
517 | ||
1da177e4 | 518 | #endif /* __LINUX_MII_H__ */ |