sfc: SFT9001: Fix speed reporting in 1G PHY loopback

Instead of disabling AN in loopback, just prevent restarting AN and
override the speed in sft9001_get_settings().

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/sfc/mdio_10g.c b/drivers/net/sfc/mdio_10g.c
index f6a1642..7f09ab5 100644 (file)
--- a/drivers/net/sfc/mdio_10g.c
+++ b/drivers/net/sfc/mdio_10g.c
@@ -15,6 +15,7 @@
 #include "net_driver.h"
 #include "mdio_10g.h"
 #include "boards.h"
+#include "workarounds.h"
 
 int mdio_clause45_reset_mmd(struct efx_nic *port, int mmd,
                            int spins, int spintime)
@@ -517,6 +518,9 @@ int mdio_clause45_set_settings(struct efx_nic *efx,
                        reg |= BMCR_ANENABLE | BMCR_ANRESTART;
                else
                        reg &= ~BMCR_ANENABLE;
+               if (EFX_WORKAROUND_15195(efx)
+                   && LOOPBACK_MASK(efx) & efx->phy_op->loopbacks)
+                       reg &= ~BMCR_ANRESTART;
                if (xnp)
                        reg |= 1 << MDIO_AN_CTRL_XNP_LBN;
                else

diff --git a/drivers/net/sfc/tenxpress.c b/drivers/net/sfc/tenxpress.c
index 80c8d6e..bc2833f 100644 (file)
--- a/drivers/net/sfc/tenxpress.c
+++ b/drivers/net/sfc/tenxpress.c
@@ -511,7 +511,7 @@ static void tenxpress_phy_reconfigure(struct efx_nic *efx)
 {
        struct tenxpress_phy_data *phy_data = efx->phy_data;
        struct ethtool_cmd ecmd;
-       bool phy_mode_change, loop_reset, loop_toggle, loopback;
+       bool phy_mode_change, loop_reset;
 
        if (efx->phy_mode & (PHY_MODE_OFF | PHY_MODE_SPECIAL)) {
                phy_data->phy_mode = efx->phy_mode;
@@ -522,12 +522,10 @@ static void tenxpress_phy_reconfigure(struct efx_nic *efx)
 
        phy_mode_change = (efx->phy_mode == PHY_MODE_NORMAL &&
                           phy_data->phy_mode != PHY_MODE_NORMAL);
-       loopback = LOOPBACK_MASK(efx) & efx->phy_op->loopbacks;
-       loop_toggle = LOOPBACK_CHANGED(phy_data, efx, efx->phy_op->loopbacks);
        loop_reset = (LOOPBACK_OUT_OF(phy_data, efx, efx->phy_op->loopbacks) ||
                      LOOPBACK_CHANGED(phy_data, efx, 1 << LOOPBACK_GPHY));
 
-       if (loop_reset || loop_toggle || loopback || phy_mode_change) {
+       if (loop_reset || phy_mode_change) {
                int rc;
 
                efx->phy_op->get_settings(efx, &ecmd);
@@ -542,20 +540,6 @@ static void tenxpress_phy_reconfigure(struct efx_nic *efx)
                                falcon_reset_xaui(efx);
                }
 
-               if (efx->phy_type != PHY_TYPE_SFX7101) {
-                       /* Only change autoneg once, on coming out or
-                        * going into loopback */
-                       if (loop_toggle)
-                               ecmd.autoneg = !loopback;
-                       if (loopback) {
-                               ecmd.duplex = DUPLEX_FULL;
-                               if (efx->loopback_mode == LOOPBACK_GPHY)
-                                       ecmd.speed = SPEED_1000;
-                               else
-                                       ecmd.speed = SPEED_10000;
-                       }
-               }
-
                rc = efx->phy_op->set_settings(efx, &ecmd);
                WARN_ON(rc);
        }
@@ -813,6 +797,13 @@ static void sft9001_get_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
                ecmd->duplex = (reg & (1 << GPHY_DUPLEX_LBN) ?
                                DUPLEX_FULL : DUPLEX_HALF);
        }
+
+       /* In loopback, the PHY automatically brings up the correct interface,
+        * but doesn't advertise the correct speed. So override it */
+       if (efx->loopback_mode == LOOPBACK_GPHY)
+               ecmd->speed = SPEED_1000;
+       else if (LOOPBACK_MASK(efx) & SFT9001_LOOPBACKS)
+               ecmd->speed = SPEED_10000;
 }
 
 static int sft9001_set_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)

diff --git a/drivers/net/sfc/workarounds.h b/drivers/net/sfc/workarounds.h
index 797a0cf..420fe15 100644 (file)
--- a/drivers/net/sfc/workarounds.h
+++ b/drivers/net/sfc/workarounds.h
@@ -19,6 +19,8 @@
 #define EFX_WORKAROUND_FALCON_A(efx) (falcon_rev(efx) <= FALCON_REV_A1)
 #define EFX_WORKAROUND_10G(efx) EFX_IS10G(efx)
 #define EFX_WORKAROUND_SFT9001A(efx) ((efx)->phy_type == PHY_TYPE_SFT9001A)
+#define EFX_WORKAROUND_SFT9001(efx) ((efx)->phy_type == PHY_TYPE_SFT9001A || \
+                                    (efx)->phy_type == PHY_TYPE_SFT9001B)
 
 /* XAUI resets if link not detected */
 #define EFX_WORKAROUND_5147 EFX_WORKAROUND_ALWAYS
@@ -56,4 +58,7 @@
 /* Need to keep AN enabled */
 #define EFX_WORKAROUND_13963 EFX_WORKAROUND_SFT9001A
 
+/* Don't restart AN in near-side loopback */
+#define EFX_WORKAROUND_15195 EFX_WORKAROUND_SFT9001
+
 #endif /* EFX_WORKAROUNDS_H */