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sfc: Fix unreliable link detection in some loopback modes 

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ben Hutchings 2008-12-26 13:46:12 -08:00 committed by David S. Miller
parent 6977dc6309
commit caa8d8bbdd
3 changed files with 24 additions and 13 deletions
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22
drivers/net/sfc/mdio_10g.c
View File

@ -167,7 +167,7 @@ int mdio_clause45_check_mmds(struct efx_nic *efx,
bool mdio_clause45_links_ok(struct efx_nic *efx, unsigned int mmd_mask)
{
int phy_id = efx->mii.phy_id;
int status;
u32 reg;
bool ok = true;
int mmd = 0;
@ -179,12 +179,17 @@ bool mdio_clause45_links_ok(struct efx_nic *efx, unsigned int mmd_mask)
return false;
else if (efx_phy_mode_disabled(efx->phy_mode))
return false;
else if (efx->loopback_mode == LOOPBACK_PHYXS)
else if (efx->loopback_mode == LOOPBACK_PHYXS) {
mmd_mask &= ~(MDIO_MMDREG_DEVS_PHYXS |
MDIO_MMDREG_DEVS_PCS |
MDIO_MMDREG_DEVS_PMAPMD |
MDIO_MMDREG_DEVS_AN);
else if (efx->loopback_mode == LOOPBACK_PCS)
if (!mmd_mask) {
reg = mdio_clause45_read(efx, phy_id, MDIO_MMD_PHYXS,
MDIO_PHYXS_STATUS2);
return !(reg & (1 << MDIO_PHYXS_STATUS2_RX_FAULT_LBN));
}
} else if (efx->loopback_mode == LOOPBACK_PCS)
mmd_mask &= ~(MDIO_MMDREG_DEVS_PCS |
MDIO_MMDREG_DEVS_PMAPMD |
MDIO_MMDREG_DEVS_AN);
@ -196,12 +201,11 @@ bool mdio_clause45_links_ok(struct efx_nic *efx, unsigned int mmd_mask)
if (mmd_mask & 1) {
/* Double reads because link state is latched, and a
* read moves the current state into the register */
status = mdio_clause45_read(efx, phy_id,
mmd, MDIO_MMDREG_STAT1);
status = mdio_clause45_read(efx, phy_id,
mmd, MDIO_MMDREG_STAT1);
ok = ok && (status & (1 << MDIO_MMDREG_STAT1_LINK_LBN));
reg = mdio_clause45_read(efx, phy_id,
mmd, MDIO_MMDREG_STAT1);
reg = mdio_clause45_read(efx, phy_id,
mmd, MDIO_MMDREG_STAT1);
ok = ok && (reg & (1 << MDIO_MMDREG_STAT1_LINK_LBN));
}
mmd_mask = (mmd_mask >> 1);
mmd++;

4
drivers/net/sfc/mdio_10g.h
View File

@ -133,6 +133,10 @@
#define MDIO_PMAPMD_10GBT_TXPWR_SHORT_LBN (0)
#define MDIO_PMAPMD_10GBT_TXPWR_SHORT_WIDTH (1)
/* PHY XGXS Status 2 */
#define MDIO_PHYXS_STATUS2 (8)
#define MDIO_PHYXS_STATUS2_RX_FAULT_LBN 10
/* PHY XGXS lane state */
#define MDIO_PHYXS_LANE_STATE (0x18)
#define MDIO_PHYXS_LANE_ALIGNED_LBN (12)

11
drivers/net/sfc/tenxpress.c
View File

@ -445,14 +445,13 @@ static bool sft9001_link_ok(struct efx_nic *efx, struct ethtool_cmd *ecmd)
int phy_id = efx->mii.phy_id;
u32 reg;
if (efx->loopback_mode == LOOPBACK_GPHY)
return true;
else if (efx_phy_mode_disabled(efx->phy_mode))
if (efx_phy_mode_disabled(efx->phy_mode))
return false;
else if (efx->loopback_mode == LOOPBACK_GPHY)
return true;
else if (efx->loopback_mode)
return mdio_clause45_links_ok(efx,
MDIO_MMDREG_DEVS_PMAPMD |
MDIO_MMDREG_DEVS_PCS |
MDIO_MMDREG_DEVS_PHYXS);
/* We must use the same definition of link state as LASI,
@ -588,6 +587,10 @@ static void tenxpress_phy_poll(struct efx_nic *efx)
change = true;
}
sfx7101_check_bad_lp(efx, link_ok);
} else if (efx->loopback_mode) {
bool link_ok = sft9001_link_ok(efx, NULL);
if (link_ok != efx->link_up)
change = true;
} else {
u32 status = mdio_clause45_read(efx, efx->mii.phy_id,
MDIO_MMD_PMAPMD,