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Linux/include/linux/mii.h

  1 /*
  2  * linux/mii.h: definitions for MII-compatible transceivers
  3  * Originally drivers/net/sunhme.h.
  4  *
  5  * Copyright (C) 1996, 1999, 2001 David S. Miller (davem@redhat.com)
  6  */
  7 #ifndef __LINUX_MII_H__
  8 #define __LINUX_MII_H__
  9 
 10 
 11 #include <linux/if.h>
 12 #include <uapi/linux/mii.h>
 13 
 14 struct ethtool_cmd;
 15 
 16 struct mii_if_info {
 17         int phy_id;
 18         int advertising;
 19         int phy_id_mask;
 20         int reg_num_mask;
 21 
 22         unsigned int full_duplex : 1;   /* is full duplex? */
 23         unsigned int force_media : 1;   /* is autoneg. disabled? */
 24         unsigned int supports_gmii : 1; /* are GMII registers supported? */
 25 
 26         struct net_device *dev;
 27         int (*mdio_read) (struct net_device *dev, int phy_id, int location);
 28         void (*mdio_write) (struct net_device *dev, int phy_id, int location, int val);
 29 };
 30 
 31 extern int mii_link_ok (struct mii_if_info *mii);
 32 extern int mii_nway_restart (struct mii_if_info *mii);
 33 extern int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
 34 extern int mii_ethtool_get_link_ksettings(
 35         struct mii_if_info *mii, struct ethtool_link_ksettings *cmd);
 36 extern int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
 37 extern int mii_ethtool_set_link_ksettings(
 38         struct mii_if_info *mii, const struct ethtool_link_ksettings *cmd);
 39 extern int mii_check_gmii_support(struct mii_if_info *mii);
 40 extern void mii_check_link (struct mii_if_info *mii);
 41 extern unsigned int mii_check_media (struct mii_if_info *mii,
 42                                      unsigned int ok_to_print,
 43                                      unsigned int init_media);
 44 extern int generic_mii_ioctl(struct mii_if_info *mii_if,
 45                              struct mii_ioctl_data *mii_data, int cmd,
 46                              unsigned int *duplex_changed);
 47 
 48 
 49 static inline struct mii_ioctl_data *if_mii(struct ifreq *rq)
 50 {
 51         return (struct mii_ioctl_data *) &rq->ifr_ifru;
 52 }
 53 
 54 /**
 55  * mii_nway_result
 56  * @negotiated: value of MII ANAR and'd with ANLPAR
 57  *
 58  * Given a set of MII abilities, check each bit and returns the
 59  * currently supported media, in the priority order defined by
 60  * IEEE 802.3u.  We use LPA_xxx constants but note this is not the
 61  * value of LPA solely, as described above.
 62  *
 63  * The one exception to IEEE 802.3u is that 100baseT4 is placed
 64  * between 100T-full and 100T-half.  If your phy does not support
 65  * 100T4 this is fine.  If your phy places 100T4 elsewhere in the
 66  * priority order, you will need to roll your own function.
 67  */
 68 static inline unsigned int mii_nway_result (unsigned int negotiated)
 69 {
 70         unsigned int ret;
 71 
 72         if (negotiated & LPA_100FULL)
 73                 ret = LPA_100FULL;
 74         else if (negotiated & LPA_100BASE4)
 75                 ret = LPA_100BASE4;
 76         else if (negotiated & LPA_100HALF)
 77                 ret = LPA_100HALF;
 78         else if (negotiated & LPA_10FULL)
 79                 ret = LPA_10FULL;
 80         else
 81                 ret = LPA_10HALF;
 82 
 83         return ret;
 84 }
 85 
 86 /**
 87  * mii_duplex
 88  * @duplex_lock: Non-zero if duplex is locked at full
 89  * @negotiated: value of MII ANAR and'd with ANLPAR
 90  *
 91  * A small helper function for a common case.  Returns one
 92  * if the media is operating or locked at full duplex, and
 93  * returns zero otherwise.
 94  */
 95 static inline unsigned int mii_duplex (unsigned int duplex_lock,
 96                                        unsigned int negotiated)
 97 {
 98         if (duplex_lock)
 99                 return 1;
100         if (mii_nway_result(negotiated) & LPA_DUPLEX)
101                 return 1;
102         return 0;
103 }
104 
105 /**
106  * ethtool_adv_to_mii_adv_t
107  * @ethadv: the ethtool advertisement settings
108  *
109  * A small helper function that translates ethtool advertisement
110  * settings to phy autonegotiation advertisements for the
111  * MII_ADVERTISE register.
112  */
113 static inline u32 ethtool_adv_to_mii_adv_t(u32 ethadv)
114 {
115         u32 result = 0;
116 
117         if (ethadv & ADVERTISED_10baseT_Half)
118                 result |= ADVERTISE_10HALF;
119         if (ethadv & ADVERTISED_10baseT_Full)
120                 result |= ADVERTISE_10FULL;
121         if (ethadv & ADVERTISED_100baseT_Half)
122                 result |= ADVERTISE_100HALF;
123         if (ethadv & ADVERTISED_100baseT_Full)
124                 result |= ADVERTISE_100FULL;
125         if (ethadv & ADVERTISED_Pause)
126                 result |= ADVERTISE_PAUSE_CAP;
127         if (ethadv & ADVERTISED_Asym_Pause)
128                 result |= ADVERTISE_PAUSE_ASYM;
129 
130         return result;
131 }
132 
133 /**
134  * mii_adv_to_ethtool_adv_t
135  * @adv: value of the MII_ADVERTISE register
136  *
137  * A small helper function that translates MII_ADVERTISE bits
138  * to ethtool advertisement settings.
139  */
140 static inline u32 mii_adv_to_ethtool_adv_t(u32 adv)
141 {
142         u32 result = 0;
143 
144         if (adv & ADVERTISE_10HALF)
145                 result |= ADVERTISED_10baseT_Half;
146         if (adv & ADVERTISE_10FULL)
147                 result |= ADVERTISED_10baseT_Full;
148         if (adv & ADVERTISE_100HALF)
149                 result |= ADVERTISED_100baseT_Half;
150         if (adv & ADVERTISE_100FULL)
151                 result |= ADVERTISED_100baseT_Full;
152         if (adv & ADVERTISE_PAUSE_CAP)
153                 result |= ADVERTISED_Pause;
154         if (adv & ADVERTISE_PAUSE_ASYM)
155                 result |= ADVERTISED_Asym_Pause;
156 
157         return result;
158 }
159 
160 /**
161  * ethtool_adv_to_mii_ctrl1000_t
162  * @ethadv: the ethtool advertisement settings
163  *
164  * A small helper function that translates ethtool advertisement
165  * settings to phy autonegotiation advertisements for the
166  * MII_CTRL1000 register when in 1000T mode.
167  */
168 static inline u32 ethtool_adv_to_mii_ctrl1000_t(u32 ethadv)
169 {
170         u32 result = 0;
171 
172         if (ethadv & ADVERTISED_1000baseT_Half)
173                 result |= ADVERTISE_1000HALF;
174         if (ethadv & ADVERTISED_1000baseT_Full)
175                 result |= ADVERTISE_1000FULL;
176 
177         return result;
178 }
179 
180 /**
181  * mii_ctrl1000_to_ethtool_adv_t
182  * @adv: value of the MII_CTRL1000 register
183  *
184  * A small helper function that translates MII_CTRL1000
185  * bits, when in 1000Base-T mode, to ethtool
186  * advertisement settings.
187  */
188 static inline u32 mii_ctrl1000_to_ethtool_adv_t(u32 adv)
189 {
190         u32 result = 0;
191 
192         if (adv & ADVERTISE_1000HALF)
193                 result |= ADVERTISED_1000baseT_Half;
194         if (adv & ADVERTISE_1000FULL)
195                 result |= ADVERTISED_1000baseT_Full;
196 
197         return result;
198 }
199 
200 /**
201  * mii_lpa_to_ethtool_lpa_t
202  * @adv: value of the MII_LPA register
203  *
204  * A small helper function that translates MII_LPA
205  * bits, when in 1000Base-T mode, to ethtool
206  * LP advertisement settings.
207  */
208 static inline u32 mii_lpa_to_ethtool_lpa_t(u32 lpa)
209 {
210         u32 result = 0;
211 
212         if (lpa & LPA_LPACK)
213                 result |= ADVERTISED_Autoneg;
214 
215         return result | mii_adv_to_ethtool_adv_t(lpa);
216 }
217 
218 /**
219  * mii_stat1000_to_ethtool_lpa_t
220  * @adv: value of the MII_STAT1000 register
221  *
222  * A small helper function that translates MII_STAT1000
223  * bits, when in 1000Base-T mode, to ethtool
224  * advertisement settings.
225  */
226 static inline u32 mii_stat1000_to_ethtool_lpa_t(u32 lpa)
227 {
228         u32 result = 0;
229 
230         if (lpa & LPA_1000HALF)
231                 result |= ADVERTISED_1000baseT_Half;
232         if (lpa & LPA_1000FULL)
233                 result |= ADVERTISED_1000baseT_Full;
234 
235         return result;
236 }
237 
238 /**
239  * ethtool_adv_to_mii_adv_x
240  * @ethadv: the ethtool advertisement settings
241  *
242  * A small helper function that translates ethtool advertisement
243  * settings to phy autonegotiation advertisements for the
244  * MII_CTRL1000 register when in 1000Base-X mode.
245  */
246 static inline u32 ethtool_adv_to_mii_adv_x(u32 ethadv)
247 {
248         u32 result = 0;
249 
250         if (ethadv & ADVERTISED_1000baseT_Half)
251                 result |= ADVERTISE_1000XHALF;
252         if (ethadv & ADVERTISED_1000baseT_Full)
253                 result |= ADVERTISE_1000XFULL;
254         if (ethadv & ADVERTISED_Pause)
255                 result |= ADVERTISE_1000XPAUSE;
256         if (ethadv & ADVERTISED_Asym_Pause)
257                 result |= ADVERTISE_1000XPSE_ASYM;
258 
259         return result;
260 }
261 
262 /**
263  * mii_adv_to_ethtool_adv_x
264  * @adv: value of the MII_CTRL1000 register
265  *
266  * A small helper function that translates MII_CTRL1000
267  * bits, when in 1000Base-X mode, to ethtool
268  * advertisement settings.
269  */
270 static inline u32 mii_adv_to_ethtool_adv_x(u32 adv)
271 {
272         u32 result = 0;
273 
274         if (adv & ADVERTISE_1000XHALF)
275                 result |= ADVERTISED_1000baseT_Half;
276         if (adv & ADVERTISE_1000XFULL)
277                 result |= ADVERTISED_1000baseT_Full;
278         if (adv & ADVERTISE_1000XPAUSE)
279                 result |= ADVERTISED_Pause;
280         if (adv & ADVERTISE_1000XPSE_ASYM)
281                 result |= ADVERTISED_Asym_Pause;
282 
283         return result;
284 }
285 
286 /**
287  * mii_lpa_to_ethtool_lpa_x
288  * @adv: value of the MII_LPA register
289  *
290  * A small helper function that translates MII_LPA
291  * bits, when in 1000Base-X mode, to ethtool
292  * LP advertisement settings.
293  */
294 static inline u32 mii_lpa_to_ethtool_lpa_x(u32 lpa)
295 {
296         u32 result = 0;
297 
298         if (lpa & LPA_LPACK)
299                 result |= ADVERTISED_Autoneg;
300 
301         return result | mii_adv_to_ethtool_adv_x(lpa);
302 }
303 
304 /**
305  * mii_advertise_flowctrl - get flow control advertisement flags
306  * @cap: Flow control capabilities (FLOW_CTRL_RX, FLOW_CTRL_TX or both)
307  */
308 static inline u16 mii_advertise_flowctrl(int cap)
309 {
310         u16 adv = 0;
311 
312         if (cap & FLOW_CTRL_RX)
313                 adv = ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
314         if (cap & FLOW_CTRL_TX)
315                 adv ^= ADVERTISE_PAUSE_ASYM;
316 
317         return adv;
318 }
319 
320 /**
321  * mii_resolve_flowctrl_fdx
322  * @lcladv: value of MII ADVERTISE register
323  * @rmtadv: value of MII LPA register
324  *
325  * Resolve full duplex flow control as per IEEE 802.3-2005 table 28B-3
326  */
327 static inline u8 mii_resolve_flowctrl_fdx(u16 lcladv, u16 rmtadv)
328 {
329         u8 cap = 0;
330 
331         if (lcladv & rmtadv & ADVERTISE_PAUSE_CAP) {
332                 cap = FLOW_CTRL_TX | FLOW_CTRL_RX;
333         } else if (lcladv & rmtadv & ADVERTISE_PAUSE_ASYM) {
334                 if (lcladv & ADVERTISE_PAUSE_CAP)
335                         cap = FLOW_CTRL_RX;
336                 else if (rmtadv & ADVERTISE_PAUSE_CAP)
337                         cap = FLOW_CTRL_TX;
338         }
339 
340         return cap;
341 }
342 
343 #endif /* __LINUX_MII_H__ */
344 

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