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Philippe Reynesdavem330
Philippe Reynes
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davem330
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net: mii: add generic function to support ksetting support
The old ethtool api (get_setting and set_setting) has generic mii functions mii_ethtool_sset and mii_ethtool_gset. To support the new ethtool api ({get|set}_link_ksettings), we add two generics mii function mii_ethtool_{get|set}_link_ksettings_get. Signed-off-by: Philippe Reynes <tremyfr@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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‎drivers/net/mii.c‎

Lines changed: 195 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -134,6 +134,101 @@ int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd)
134134
return 0;
135135
}
136136

137+
/**
138+
* mii_ethtool_get_link_ksettings - get settings that are specified in @cmd
139+
* @mii: MII interface
140+
* @cmd: requested ethtool_link_ksettings
141+
*
142+
* The @cmd parameter is expected to have been cleared before calling
143+
* mii_ethtool_get_link_ksettings().
144+
*
145+
* Returns 0 for success, negative on error.
146+
*/
147+
int mii_ethtool_get_link_ksettings(struct mii_if_info *mii,
148+
struct ethtool_link_ksettings *cmd)
149+
{
150+
struct net_device *dev = mii->dev;
151+
u16 bmcr, bmsr, ctrl1000 = 0, stat1000 = 0;
152+
u32 nego, supported, advertising, lp_advertising;
153+
154+
supported = (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
155+
SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
156+
SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII);
157+
if (mii->supports_gmii)
158+
supported |= SUPPORTED_1000baseT_Half |
159+
SUPPORTED_1000baseT_Full;
160+
161+
/* only supports twisted-pair */
162+
cmd->base.port = PORT_MII;
163+
164+
/* this isn't fully supported at higher layers */
165+
cmd->base.phy_address = mii->phy_id;
166+
cmd->base.mdio_support = ETH_MDIO_SUPPORTS_C22;
167+
168+
advertising = ADVERTISED_TP | ADVERTISED_MII;
169+
170+
bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
171+
bmsr = mii->mdio_read(dev, mii->phy_id, MII_BMSR);
172+
if (mii->supports_gmii) {
173+
ctrl1000 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000);
174+
stat1000 = mii->mdio_read(dev, mii->phy_id, MII_STAT1000);
175+
}
176+
if (bmcr & BMCR_ANENABLE) {
177+
advertising |= ADVERTISED_Autoneg;
178+
cmd->base.autoneg = AUTONEG_ENABLE;
179+
180+
advertising |= mii_get_an(mii, MII_ADVERTISE);
181+
if (mii->supports_gmii)
182+
advertising |= mii_ctrl1000_to_ethtool_adv_t(ctrl1000);
183+
184+
if (bmsr & BMSR_ANEGCOMPLETE) {
185+
lp_advertising = mii_get_an(mii, MII_LPA);
186+
lp_advertising |=
187+
mii_stat1000_to_ethtool_lpa_t(stat1000);
188+
} else {
189+
lp_advertising = 0;
190+
}
191+
192+
nego = advertising & lp_advertising;
193+
194+
if (nego & (ADVERTISED_1000baseT_Full |
195+
ADVERTISED_1000baseT_Half)) {
196+
cmd->base.speed = SPEED_1000;
197+
cmd->base.duplex = !!(nego & ADVERTISED_1000baseT_Full);
198+
} else if (nego & (ADVERTISED_100baseT_Full |
199+
ADVERTISED_100baseT_Half)) {
200+
cmd->base.speed = SPEED_100;
201+
cmd->base.duplex = !!(nego & ADVERTISED_100baseT_Full);
202+
} else {
203+
cmd->base.speed = SPEED_10;
204+
cmd->base.duplex = !!(nego & ADVERTISED_10baseT_Full);
205+
}
206+
} else {
207+
cmd->base.autoneg = AUTONEG_DISABLE;
208+
209+
cmd->base.speed = ((bmcr & BMCR_SPEED1000 &&
210+
(bmcr & BMCR_SPEED100) == 0) ?
211+
SPEED_1000 :
212+
((bmcr & BMCR_SPEED100) ?
213+
SPEED_100 : SPEED_10));
214+
cmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
215+
DUPLEX_FULL : DUPLEX_HALF;
216+
}
217+
218+
mii->full_duplex = cmd->base.duplex;
219+
220+
ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
221+
supported);
222+
ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
223+
advertising);
224+
ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising,
225+
lp_advertising);
226+
227+
/* ignore maxtxpkt, maxrxpkt for now */
228+
229+
return 0;
230+
}
231+
137232
/**
138233
* mii_ethtool_sset - set settings that are specified in @ecmd
139234
* @mii: MII interface
@@ -226,6 +321,104 @@ int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd)
226321
return 0;
227322
}
228323

324+
/**
325+
* mii_ethtool_set_link_ksettings - set settings that are specified in @cmd
326+
* @mii: MII interfaces
327+
* @cmd: requested ethtool_link_ksettings
328+
*
329+
* Returns 0 for success, negative on error.
330+
*/
331+
int mii_ethtool_set_link_ksettings(struct mii_if_info *mii,
332+
const struct ethtool_link_ksettings *cmd)
333+
{
334+
struct net_device *dev = mii->dev;
335+
u32 speed = cmd->base.speed;
336+
337+
if (speed != SPEED_10 &&
338+
speed != SPEED_100 &&
339+
speed != SPEED_1000)
340+
return -EINVAL;
341+
if (cmd->base.duplex != DUPLEX_HALF && cmd->base.duplex != DUPLEX_FULL)
342+
return -EINVAL;
343+
if (cmd->base.port != PORT_MII)
344+
return -EINVAL;
345+
if (cmd->base.phy_address != mii->phy_id)
346+
return -EINVAL;
347+
if (cmd->base.autoneg != AUTONEG_DISABLE &&
348+
cmd->base.autoneg != AUTONEG_ENABLE)
349+
return -EINVAL;
350+
if ((speed == SPEED_1000) && (!mii->supports_gmii))
351+
return -EINVAL;
352+
353+
/* ignore supported, maxtxpkt, maxrxpkt */
354+
355+
if (cmd->base.autoneg == AUTONEG_ENABLE) {
356+
u32 bmcr, advert, tmp;
357+
u32 advert2 = 0, tmp2 = 0;
358+
u32 advertising;
359+
360+
ethtool_convert_link_mode_to_legacy_u32(
361+
&advertising, cmd->link_modes.advertising);
362+
363+
if ((advertising & (ADVERTISED_10baseT_Half |
364+
ADVERTISED_10baseT_Full |
365+
ADVERTISED_100baseT_Half |
366+
ADVERTISED_100baseT_Full |
367+
ADVERTISED_1000baseT_Half |
368+
ADVERTISED_1000baseT_Full)) == 0)
369+
return -EINVAL;
370+
371+
/* advertise only what has been requested */
372+
advert = mii->mdio_read(dev, mii->phy_id, MII_ADVERTISE);
373+
tmp = advert & ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
374+
if (mii->supports_gmii) {
375+
advert2 = mii->mdio_read(dev, mii->phy_id,
376+
MII_CTRL1000);
377+
tmp2 = advert2 &
378+
~(ADVERTISE_1000HALF | ADVERTISE_1000FULL);
379+
}
380+
tmp |= ethtool_adv_to_mii_adv_t(advertising);
381+
382+
if (mii->supports_gmii)
383+
tmp2 |= ethtool_adv_to_mii_ctrl1000_t(advertising);
384+
if (advert != tmp) {
385+
mii->mdio_write(dev, mii->phy_id, MII_ADVERTISE, tmp);
386+
mii->advertising = tmp;
387+
}
388+
if ((mii->supports_gmii) && (advert2 != tmp2))
389+
mii->mdio_write(dev, mii->phy_id, MII_CTRL1000, tmp2);
390+
391+
/* turn on autonegotiation, and force a renegotiate */
392+
bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
393+
bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
394+
mii->mdio_write(dev, mii->phy_id, MII_BMCR, bmcr);
395+
396+
mii->force_media = 0;
397+
} else {
398+
u32 bmcr, tmp;
399+
400+
/* turn off auto negotiation, set speed and duplexity */
401+
bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
402+
tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 |
403+
BMCR_SPEED1000 | BMCR_FULLDPLX);
404+
if (speed == SPEED_1000)
405+
tmp |= BMCR_SPEED1000;
406+
else if (speed == SPEED_100)
407+
tmp |= BMCR_SPEED100;
408+
if (cmd->base.duplex == DUPLEX_FULL) {
409+
tmp |= BMCR_FULLDPLX;
410+
mii->full_duplex = 1;
411+
} else {
412+
mii->full_duplex = 0;
413+
}
414+
if (bmcr != tmp)
415+
mii->mdio_write(dev, mii->phy_id, MII_BMCR, tmp);
416+
417+
mii->force_media = 1;
418+
}
419+
return 0;
420+
}
421+
229422
/**
230423
* mii_check_gmii_support - check if the MII supports Gb interfaces
231424
* @mii: the MII interface
@@ -466,7 +659,9 @@ MODULE_LICENSE("GPL");
466659
EXPORT_SYMBOL(mii_link_ok);
467660
EXPORT_SYMBOL(mii_nway_restart);
468661
EXPORT_SYMBOL(mii_ethtool_gset);
662+
EXPORT_SYMBOL(mii_ethtool_get_link_ksettings);
469663
EXPORT_SYMBOL(mii_ethtool_sset);
664+
EXPORT_SYMBOL(mii_ethtool_set_link_ksettings);
470665
EXPORT_SYMBOL(mii_check_link);
471666
EXPORT_SYMBOL(mii_check_media);
472667
EXPORT_SYMBOL(mii_check_gmii_support);

‎include/linux/mii.h‎

Lines changed: 4 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -31,7 +31,11 @@ struct mii_if_info {
3131
extern int mii_link_ok (struct mii_if_info *mii);
3232
extern int mii_nway_restart (struct mii_if_info *mii);
3333
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);
3436
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);
3539
extern int mii_check_gmii_support(struct mii_if_info *mii);
3640
extern void mii_check_link (struct mii_if_info *mii);
3741
extern unsigned int mii_check_media (struct mii_if_info *mii,

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