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cxgb: replace r273280 with a more comprehensive fix.

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Poll for link state when the link is down, even for interrupt capable
PHYs.

Allow PHYs to report a dubious "partial" link.  If this state is seen 3
consecutive times (each check is ~1s apart) then reset the PHY.  This is
a workaround for a situation where repeatedly toggling the link from the
peer gets the AEL2005 PHY into a state where it never establishes a PCS
block lock even when everything is in order.

MFC after:	1 week
This commit is contained in:
Navdeep Parhar 2015-01-11 07:51:58 +00:00
parent 2de874ed23
commit a5eb009b49
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=276959
8 changed files with 59 additions and 33 deletions
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35
sys/dev/cxgb/common/cxgb_ael1002.c
View file

@ -283,10 +283,10 @@ static int ael1002_intr_noop(struct cphy *phy)
/*
* Get link status for a 10GBASE-R device.
*/
static int get_link_status_r(struct cphy *phy, int *link_ok, int *speed,
static int get_link_status_r(struct cphy *phy, int *link_state, int *speed,
int *duplex, int *fc)
{
if (link_ok) {
if (link_state) {
unsigned int stat0, stat1, stat2;
int err = mdio_read(phy, MDIO_DEV_PMA_PMD, PMD_RSD, &stat0);
@ -296,10 +296,16 @@ static int get_link_status_r(struct cphy *phy, int *link_ok, int *speed,
err = mdio_read(phy, MDIO_DEV_XGXS, XS_LN_STAT, &stat2);
if (err)
return err;
*link_ok = (stat0 & stat1 & (stat2 >> 12)) & 1;
if (*link_ok == 0)
return (0);
stat0 &= 1;
stat1 &= 1;
stat2 = (stat2 >> 12) & 1;
if (stat0 & stat1 & stat2)
*link_state = PHY_LINK_UP;
else if (stat0 == 1 && stat1 == 0 && stat2 == 1)
*link_state = PHY_LINK_PARTIAL;
else
*link_state = PHY_LINK_DOWN;
}
if (speed)
*speed = SPEED_10000;
@ -1345,10 +1351,8 @@ static int ael2005_intr_handler(struct cphy *phy)
return ret;
ret |= cause;
if (!ret) {
(void) ael2005_reset(phy, 0);
if (!ret)
ret |= cphy_cause_link_change;
}
return ret;
}
@ -2156,10 +2160,10 @@ int t3_ael2020_phy_prep(pinfo_t *pinfo, int phy_addr,
/*
* Get link status for a 10GBASE-X device.
*/
static int get_link_status_x(struct cphy *phy, int *link_ok, int *speed,
static int get_link_status_x(struct cphy *phy, int *link_state, int *speed,
int *duplex, int *fc)
{
if (link_ok) {
if (link_state) {
unsigned int stat0, stat1, stat2;
int err = mdio_read(phy, MDIO_DEV_PMA_PMD, PMD_RSD, &stat0);
@ -2169,7 +2173,10 @@ static int get_link_status_x(struct cphy *phy, int *link_ok, int *speed,
err = mdio_read(phy, MDIO_DEV_XGXS, XS_LN_STAT, &stat2);
if (err)
return err;
*link_ok = (stat0 & (stat1 >> 12) & (stat2 >> 12)) & 1;
if ((stat0 & (stat1 >> 12) & (stat2 >> 12)) & 1)
*link_state = PHY_LINK_UP;
else
*link_state = PHY_LINK_DOWN;
}
if (speed)
*speed = SPEED_10000;
@ -2230,10 +2237,10 @@ static int xaui_direct_reset(struct cphy *phy, int wait)
return 0;
}
static int xaui_direct_get_link_status(struct cphy *phy, int *link_ok,
static int xaui_direct_get_link_status(struct cphy *phy, int *link_state,
int *speed, int *duplex, int *fc)
{
if (link_ok) {
if (link_state) {
unsigned int status;
adapter_t *adapter = phy->adapter;
@ -2245,7 +2252,7 @@ static int xaui_direct_get_link_status(struct cphy *phy, int *link_ok,
XGM_REG(A_XGM_SERDES_STAT2, phy->addr)) |
t3_read_reg(adapter,
XGM_REG(A_XGM_SERDES_STAT3, phy->addr));
*link_ok = !(status & F_LOWSIG0);
*link_state = status & F_LOWSIG0 ? PHY_LINK_DOWN : PHY_LINK_UP;
}
if (speed)
*speed = SPEED_10000;

6
sys/dev/cxgb/common/cxgb_aq100x.c
View file

@ -350,7 +350,7 @@ aq100x_set_speed_duplex(struct cphy *phy, int speed, int duplex)
}
static int
aq100x_get_link_status(struct cphy *phy, int *link_ok, int *speed, int *duplex,
aq100x_get_link_status(struct cphy *phy, int *link_state, int *speed, int *duplex,
int *fc)
{
int err;
@ -440,8 +440,8 @@ aq100x_get_link_status(struct cphy *phy, int *link_ok, int *speed, int *duplex,
link = 1;
done:
if (link_ok)
*link_ok = link;
if (link_state)
*link_state = link ? PHY_LINK_UP : PHY_LINK_DOWN;
return (0);
}

9
sys/dev/cxgb/common/cxgb_common.h
View file

@ -543,6 +543,12 @@ enum {
phy_modtype_unknown
};
enum {
PHY_LINK_DOWN = 0,
PHY_LINK_UP,
PHY_LINK_PARTIAL
};
/* PHY operations */
struct cphy_ops {
int (*reset)(struct cphy *phy, int wait);
@ -558,7 +564,7 @@ struct cphy_ops {
int (*advertise)(struct cphy *phy, unsigned int advertise_map);
int (*set_loopback)(struct cphy *phy, int mmd, int dir, int enable);
int (*set_speed_duplex)(struct cphy *phy, int speed, int duplex);
int (*get_link_status)(struct cphy *phy, int *link_ok, int *speed,
int (*get_link_status)(struct cphy *phy, int *link_state, int *speed,
int *duplex, int *fc);
int (*power_down)(struct cphy *phy, int enable);
};
@ -567,6 +573,7 @@ struct cphy_ops {
struct cphy {
u8 addr; /* PHY address */
u8 modtype; /* PHY module type */
u8 rst;
unsigned int priv; /* scratch pad */
unsigned int caps; /* PHY capabilities */
adapter_t *adapter; /* associated adapter */

7
sys/dev/cxgb/common/cxgb_mv88e1xxx.c
View file

@ -185,7 +185,7 @@ static int mv88e1xxx_set_loopback(struct cphy *cphy, int mmd, int dir, int on)
on ? BMCR_LOOPBACK : 0);
}
static int mv88e1xxx_get_link_status(struct cphy *cphy, int *link_ok,
static int mv88e1xxx_get_link_status(struct cphy *cphy, int *link_state,
int *speed, int *duplex, int *fc)
{
u32 status;
@ -206,8 +206,9 @@ static int mv88e1xxx_get_link_status(struct cphy *cphy, int *link_ok,
else
sp = SPEED_1000;
}
if (link_ok)
*link_ok = (status & V_PSSR_LINK) != 0;
if (link_state)
*link_state = status & V_PSSR_LINK ? PHY_LINK_UP :
PHY_LINK_DOWN;
if (speed)
*speed = sp;
if (duplex)

11
sys/dev/cxgb/common/cxgb_t3_hw.c
View file

@ -1520,7 +1520,7 @@ static void t3_clear_faults(adapter_t *adapter, int port_id)
*/
void t3_link_changed(adapter_t *adapter, int port_id)
{
int link_ok, speed, duplex, fc, link_fault;
int link_ok, speed, duplex, fc, link_fault, link_state;
struct port_info *pi = adap2pinfo(adapter, port_id);
struct cphy *phy = &pi->phy;
struct cmac *mac = &pi->mac;
@ -1532,7 +1532,14 @@ void t3_link_changed(adapter_t *adapter, int port_id)
fc = lc->fc;
link_fault = 0;
phy->ops->get_link_status(phy, &link_ok, &speed, &duplex, &fc);
phy->ops->get_link_status(phy, &link_state, &speed, &duplex, &fc);
link_ok = (link_state == PHY_LINK_UP);
if (link_state != PHY_LINK_PARTIAL)
phy->rst = 0;
else if (++phy->rst == 3) {
phy->ops->reset(phy, 0);
phy->rst = 0;
}
if (link_ok == 0)
pi->link_fault = LF_NO;

7
sys/dev/cxgb/common/cxgb_tn1010.c
View file

@ -129,7 +129,7 @@ static int tn1010_advertise(struct cphy *phy, unsigned int advert)
ADVERTISE_LOOP_TIMING);
}
static int tn1010_get_link_status(struct cphy *phy, int *link_ok,
static int tn1010_get_link_status(struct cphy *phy, int *link_state,
int *speed, int *duplex, int *fc)
{
unsigned int status, lpa, adv;
@ -139,8 +139,9 @@ static int tn1010_get_link_status(struct cphy *phy, int *link_ok,
if (err)
return err;
if (link_ok)
*link_ok = (status & F_LINK_STAT) != 0;
if (link_state)
*link_state = status & F_LINK_STAT ? PHY_LINK_UP :
PHY_LINK_DOWN;
if (G_ANEG_STAT(status) == ANEG_COMPLETE) {
sp = (status & F_ANEG_SPEED_1G) ? SPEED_1000 : SPEED_10000;

14
sys/dev/cxgb/common/cxgb_vsc8211.c
View file

@ -129,7 +129,7 @@ static int vsc8211_autoneg_restart(struct cphy *cphy)
BMCR_ANRESTART);
}
static int vsc8211_get_link_status(struct cphy *cphy, int *link_ok,
static int vsc8211_get_link_status(struct cphy *cphy, int *link_state,
int *speed, int *duplex, int *fc)
{
unsigned int bmcr, status, lpa, adv;
@ -141,7 +141,7 @@ static int vsc8211_get_link_status(struct cphy *cphy, int *link_ok,
if (err)
return err;
if (link_ok) {
if (link_state) {
/*
* BMSR_LSTATUS is latch-low, so if it is 0 we need to read it
* once more to get the current link state.
@ -150,7 +150,8 @@ static int vsc8211_get_link_status(struct cphy *cphy, int *link_ok,
err = mdio_read(cphy, 0, MII_BMSR, &status);
if (err)
return err;
*link_ok = (status & BMSR_LSTATUS) != 0;
*link_state = status & BMSR_LSTATUS ? PHY_LINK_UP :
PHY_LINK_DOWN;
}
if (!(bmcr & BMCR_ANENABLE)) {
dplx = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF;
@ -201,7 +202,7 @@ static int vsc8211_get_link_status(struct cphy *cphy, int *link_ok,
return 0;
}
static int vsc8211_get_link_status_fiber(struct cphy *cphy, int *link_ok,
static int vsc8211_get_link_status_fiber(struct cphy *cphy, int *link_state,
int *speed, int *duplex, int *fc)
{
unsigned int bmcr, status, lpa, adv;
@ -213,7 +214,7 @@ static int vsc8211_get_link_status_fiber(struct cphy *cphy, int *link_ok,
if (err)
return err;
if (link_ok) {
if (link_state) {
/*
* BMSR_LSTATUS is latch-low, so if it is 0 we need to read it
* once more to get the current link state.
@ -222,7 +223,8 @@ static int vsc8211_get_link_status_fiber(struct cphy *cphy, int *link_ok,
err = mdio_read(cphy, 0, MII_BMSR, &status);
if (err)
return err;
*link_ok = (status & BMSR_LSTATUS) != 0;
*link_state = status & BMSR_LSTATUS ? PHY_LINK_UP :
PHY_LINK_DOWN;
}
if (!(bmcr & BMCR_ANENABLE)) {
dplx = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF;

3
sys/dev/cxgb/cxgb_main.c
View file

@ -2289,7 +2289,8 @@ check_link_status(void *arg, int pending)
t3_link_changed(sc, pi->port_id);
if (pi->link_fault || !(pi->phy.caps & SUPPORTED_LINK_IRQ))
if (pi->link_fault || !(pi->phy.caps & SUPPORTED_LINK_IRQ) ||
pi->link_config.link_ok == 0)
callout_reset(&pi->link_check_ch, hz, link_check_callout, pi);
}