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authorBen Hutchings <bhutchings@solarflare.com>2008-12-26 13:46:12 -0800
committerDavid S. Miller <davem@davemloft.net>2008-12-26 13:46:12 -0800
commitcaa8d8bbddc9157cb8f34465be98fc83faf37155 (patch)
tree614d9c3396b94f154239a8199758b4068c72a3e5 /drivers
parent6977dc6309ea8bbcb24c0a1356c33969e4a07410 (diff)
downloadlinux-caa8d8bbddc9157cb8f34465be98fc83faf37155.tar.bz2
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/sfc/mdio_10g.c22
-rw-r--r--drivers/net/sfc/mdio_10g.h4
-rw-r--r--drivers/net/sfc/tenxpress.c11
3 files changed, 24 insertions, 13 deletions
diff --git a/drivers/net/sfc/mdio_10g.c b/drivers/net/sfc/mdio_10g.c
index 037601e0b9d7..f131ad2b6832 100644
--- a/drivers/net/sfc/mdio_10g.c
+++ b/drivers/net/sfc/mdio_10g.c
@@ -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++;
diff --git a/drivers/net/sfc/mdio_10g.h b/drivers/net/sfc/mdio_10g.h
index 409118228b1d..09bf801d0569 100644
--- a/drivers/net/sfc/mdio_10g.h
+++ b/drivers/net/sfc/mdio_10g.h
@@ -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)
diff --git a/drivers/net/sfc/tenxpress.c b/drivers/net/sfc/tenxpress.c
index b3ca2dc8040d..1567ab538e27 100644
--- a/drivers/net/sfc/tenxpress.c
+++ b/drivers/net/sfc/tenxpress.c
@@ -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,