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authorSteve Hodgson <shodgson@solarflare.com>2009-11-25 17:11:03 +0100
committerDavid S. Miller <davem@davemloft.net>2009-11-27 00:59:28 +0100
commit26deba501371c215f95624ede81ab5b611fd7d95 (patch)
tree60b788e440fcb45f5902b42cffe15feb8aa2a5b4 /drivers/net/sfc/falcon.c
parentsfc: Remove unused function efx_flush_queues() (diff)
downloadlinux-26deba501371c215f95624ede81ab5b611fd7d95.tar.xz
linux-26deba501371c215f95624ede81ab5b611fd7d95.zip
sfc: Only switch Falcon MAC clocks as necessary
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
-rw-r--r--drivers/net/sfc/falcon.c42
1 files changed, 25 insertions, 17 deletions
diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index e1b9ce30429a..9eec88502101 100644
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -2183,11 +2183,29 @@ static int falcon_mdio_read(struct net_device *net_dev,
return rc;
}
+static void falcon_clock_mac(struct efx_nic *efx)
+{
+ unsigned strap_val;
+ efx_oword_t nic_stat;
+
+ /* Configure the NIC generated MAC clock correctly */
+ efx_reado(efx, &nic_stat, FR_AB_NIC_STAT);
+ strap_val = EFX_IS10G(efx) ? 5 : 3;
+ if (falcon_rev(efx) >= FALCON_REV_B0) {
+ EFX_SET_OWORD_FIELD(nic_stat, FRF_BB_EE_STRAP_EN, 1);
+ EFX_SET_OWORD_FIELD(nic_stat, FRF_BB_EE_STRAP, strap_val);
+ efx_writeo(efx, &nic_stat, FR_AB_NIC_STAT);
+ } else {
+ /* Falcon A1 does not support 1G/10G speed switching
+ * and must not be used with a PHY that does. */
+ BUG_ON(EFX_OWORD_FIELD(nic_stat, FRF_AB_STRAP_PINS) !=
+ strap_val);
+ }
+}
+
int falcon_switch_mac(struct efx_nic *efx)
{
struct efx_mac_operations *old_mac_op = efx->mac_op;
- efx_oword_t nic_stat;
- unsigned strap_val;
int rc = 0;
/* Don't try to fetch MAC stats while we're switching MACs */
@@ -2206,24 +2224,11 @@ int falcon_switch_mac(struct efx_nic *efx)
efx->mac_op = (EFX_IS10G(efx) ?
&falcon_xmac_operations : &falcon_gmac_operations);
- /* Always push the NIC_STAT_REG setting even if the mac hasn't
- * changed, because this function is run post online reset */
- efx_reado(efx, &nic_stat, FR_AB_NIC_STAT);
- strap_val = EFX_IS10G(efx) ? 5 : 3;
- if (falcon_rev(efx) >= FALCON_REV_B0) {
- EFX_SET_OWORD_FIELD(nic_stat, FRF_BB_EE_STRAP_EN, 1);
- EFX_SET_OWORD_FIELD(nic_stat, FRF_BB_EE_STRAP, strap_val);
- efx_writeo(efx, &nic_stat, FR_AB_NIC_STAT);
- } else {
- /* Falcon A1 does not support 1G/10G speed switching
- * and must not be used with a PHY that does. */
- BUG_ON(EFX_OWORD_FIELD(nic_stat, FRF_AB_STRAP_PINS) !=
- strap_val);
- }
-
if (old_mac_op == efx->mac_op)
goto out;
+ falcon_clock_mac(efx);
+
EFX_LOG(efx, "selected %cMAC\n", EFX_IS10G(efx) ? 'X' : 'G');
/* Not all macs support a mac-level link state */
efx->mac_up = true;
@@ -2982,6 +2987,9 @@ int falcon_init_nic(struct efx_nic *efx)
efx_writeo(efx, &temp, FR_AB_GPIO_CTL);
}
+ /* Select the correct MAC */
+ falcon_clock_mac(efx);
+
rc = falcon_reset_sram(efx);
if (rc)
return rc;