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MFC: workaround no-carrier issue on IBM HS21.

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PR:		118238
This commit is contained in:
Maxim Sobolev 2010-03-25 23:38:10 +00:00
parent 3776abf91b
commit 7711964246
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/stable/8/; revision=205657
1 changed files with 35 additions and 3 deletions
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38
sys/dev/mii/brgphy.c
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@ -72,8 +72,9 @@ struct brgphy_softc {
int mii_model;
int mii_rev;
int serdes_flags; /* Keeps track of the serdes type used */
#define BRGPHY_5706S 0x0001
#define BRGPHY_5708S 0x0002
#define BRGPHY_5706S 0x0001
#define BRGPHY_5708S 0x0002
#define BRGPHY_NOANWAIT 0x0004
int bce_phy_flags; /* PHY flags transferred from the MAC driver */
};
@ -142,6 +143,23 @@ static const struct mii_phydesc brgphys[] = {
MII_PHY_END
};
#define HS21_PRODUCT_ID "IBM eServer BladeCenter HS21"
#define HS21_BCM_CHIPID 0x57081021
static int
detect_hs21(struct bce_softc *bce_sc)
{
char *sysenv;
if (bce_sc->bce_chipid != HS21_BCM_CHIPID)
return (0);
sysenv = getenv("smbios.system.product");
if (sysenv == NULL)
return (0);
if (strncmp(sysenv, HS21_PRODUCT_ID, strlen(HS21_PRODUCT_ID)) != 0)
return (0);
return (1);
}
/* Search for our PHY in the list of known PHYs */
static int
@ -291,6 +309,19 @@ brgphy_attach(device_t dev)
if (bce_sc && (bce_sc->bce_phy_flags & BCE_PHY_2_5G_CAPABLE_FLAG)) {
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_2500_SX, IFM_FDX, sc->mii_inst), 0);
printf("2500baseSX-FDX, ");
} else if ((bsc->serdes_flags & BRGPHY_5708S) && bce_sc &&
(detect_hs21(bce_sc) != 0)) {
/*
* There appears to be certain silicon revision
* in IBM HS21 blades that is having issues with
* this driver wating for the auto-negotiation to
* complete. This happens with a specific chip id
* only and when the 1000baseSX-FDX is the only
* mode. Workaround this issue since it's unlikely
* to be ever addressed.
*/
printf("auto-neg workaround, ");
bsc->serdes_flags |= BRGPHY_NOANWAIT;
}
}
@ -544,7 +575,8 @@ brgphy_status(struct mii_softc *sc)
/* Autoneg is still in progress. */
if ((bmcr & BRGPHY_BMCR_AUTOEN) &&
(bmsr & BRGPHY_BMSR_ACOMP) == 0) {
(bmsr & BRGPHY_BMSR_ACOMP) == 0 &&
(bsc->serdes_flags & BRGPHY_NOANWAIT) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
goto brgphy_status_exit;