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authorIngo Molnar <mingo@elte.hu>2009-02-09 14:58:11 +0100
committerIngo Molnar <mingo@elte.hu>2009-02-09 14:58:11 +0100
commit249d51b53aea1b7cdb1be65a1a9a0c59d9e06f3e (patch)
tree7fc06930e46ee13d394f5b031166c40206af3189 /drivers/net/sfc/efx.c
parentx86: fix abuse of per_cpu_offset (diff)
parentLinux 2.6.29-rc4 (diff)
downloadlinux-249d51b53aea1b7cdb1be65a1a9a0c59d9e06f3e.tar.xz
linux-249d51b53aea1b7cdb1be65a1a9a0c59d9e06f3e.zip
Merge commit 'v2.6.29-rc4' into core/percpu
Conflicts: arch/x86/mach-voyager/voyager_smp.c arch/x86/mm/fault.c
Diffstat (limited to 'drivers/net/sfc/efx.c')
-rw-r--r--drivers/net/sfc/efx.c59
1 files changed, 41 insertions, 18 deletions
diff --git a/drivers/net/sfc/efx.c b/drivers/net/sfc/efx.c
index 101c00a7bb73..847e9bb0098f 100644
--- a/drivers/net/sfc/efx.c
+++ b/drivers/net/sfc/efx.c
@@ -676,9 +676,8 @@ static int efx_init_port(struct efx_nic *efx)
rc = efx->phy_op->init(efx);
if (rc)
return rc;
- efx->phy_op->reconfigure(efx);
-
mutex_lock(&efx->mac_lock);
+ efx->phy_op->reconfigure(efx);
rc = falcon_switch_mac(efx);
mutex_unlock(&efx->mac_lock);
if (rc)
@@ -686,7 +685,7 @@ static int efx_init_port(struct efx_nic *efx)
efx->mac_op->reconfigure(efx);
efx->port_initialized = true;
- efx->stats_enabled = true;
+ efx_stats_enable(efx);
return 0;
fail:
@@ -735,6 +734,7 @@ static void efx_fini_port(struct efx_nic *efx)
if (!efx->port_initialized)
return;
+ efx_stats_disable(efx);
efx->phy_op->fini(efx);
efx->port_initialized = false;
@@ -1368,6 +1368,20 @@ static int efx_net_stop(struct net_device *net_dev)
return 0;
}
+void efx_stats_disable(struct efx_nic *efx)
+{
+ spin_lock(&efx->stats_lock);
+ ++efx->stats_disable_count;
+ spin_unlock(&efx->stats_lock);
+}
+
+void efx_stats_enable(struct efx_nic *efx)
+{
+ spin_lock(&efx->stats_lock);
+ --efx->stats_disable_count;
+ spin_unlock(&efx->stats_lock);
+}
+
/* Context: process, dev_base_lock or RTNL held, non-blocking. */
static struct net_device_stats *efx_net_stats(struct net_device *net_dev)
{
@@ -1376,12 +1390,12 @@ static struct net_device_stats *efx_net_stats(struct net_device *net_dev)
struct net_device_stats *stats = &net_dev->stats;
/* Update stats if possible, but do not wait if another thread
- * is updating them (or resetting the NIC); slightly stale
- * stats are acceptable.
+ * is updating them or if MAC stats fetches are temporarily
+ * disabled; slightly stale stats are acceptable.
*/
if (!spin_trylock(&efx->stats_lock))
return stats;
- if (efx->stats_enabled) {
+ if (!efx->stats_disable_count) {
efx->mac_op->update_stats(efx);
falcon_update_nic_stats(efx);
}
@@ -1629,16 +1643,12 @@ static void efx_unregister_netdev(struct efx_nic *efx)
/* Tears down the entire software state and most of the hardware state
* before reset. */
-void efx_reset_down(struct efx_nic *efx, struct ethtool_cmd *ecmd)
+void efx_reset_down(struct efx_nic *efx, enum reset_type method,
+ struct ethtool_cmd *ecmd)
{
EFX_ASSERT_RESET_SERIALISED(efx);
- /* The net_dev->get_stats handler is quite slow, and will fail
- * if a fetch is pending over reset. Serialise against it. */
- spin_lock(&efx->stats_lock);
- efx->stats_enabled = false;
- spin_unlock(&efx->stats_lock);
-
+ efx_stats_disable(efx);
efx_stop_all(efx);
mutex_lock(&efx->mac_lock);
mutex_lock(&efx->spi_lock);
@@ -1646,6 +1656,8 @@ void efx_reset_down(struct efx_nic *efx, struct ethtool_cmd *ecmd)
efx->phy_op->get_settings(efx, ecmd);
efx_fini_channels(efx);
+ if (efx->port_initialized && method != RESET_TYPE_INVISIBLE)
+ efx->phy_op->fini(efx);
}
/* This function will always ensure that the locks acquired in
@@ -1653,7 +1665,8 @@ void efx_reset_down(struct efx_nic *efx, struct ethtool_cmd *ecmd)
* that we were unable to reinitialise the hardware, and the
* driver should be disabled. If ok is false, then the rx and tx
* engines are not restarted, pending a RESET_DISABLE. */
-int efx_reset_up(struct efx_nic *efx, struct ethtool_cmd *ecmd, bool ok)
+int efx_reset_up(struct efx_nic *efx, enum reset_type method,
+ struct ethtool_cmd *ecmd, bool ok)
{
int rc;
@@ -1665,6 +1678,15 @@ int efx_reset_up(struct efx_nic *efx, struct ethtool_cmd *ecmd, bool ok)
ok = false;
}
+ if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) {
+ if (ok) {
+ rc = efx->phy_op->init(efx);
+ if (rc)
+ ok = false;
+ } else
+ efx->port_initialized = false;
+ }
+
if (ok) {
efx_init_channels(efx);
@@ -1677,7 +1699,7 @@ int efx_reset_up(struct efx_nic *efx, struct ethtool_cmd *ecmd, bool ok)
if (ok) {
efx_start_all(efx);
- efx->stats_enabled = true;
+ efx_stats_enable(efx);
}
return rc;
}
@@ -1709,7 +1731,7 @@ static int efx_reset(struct efx_nic *efx)
EFX_INFO(efx, "resetting (%d)\n", method);
- efx_reset_down(efx, &ecmd);
+ efx_reset_down(efx, method, &ecmd);
rc = falcon_reset_hw(efx, method);
if (rc) {
@@ -1728,10 +1750,10 @@ static int efx_reset(struct efx_nic *efx)
/* Leave device stopped if necessary */
if (method == RESET_TYPE_DISABLE) {
- efx_reset_up(efx, &ecmd, false);
+ efx_reset_up(efx, method, &ecmd, false);
rc = -EIO;
} else {
- rc = efx_reset_up(efx, &ecmd, true);
+ rc = efx_reset_up(efx, method, &ecmd, true);
}
out_disable:
@@ -1883,6 +1905,7 @@ static int efx_init_struct(struct efx_nic *efx, struct efx_nic_type *type,
efx->rx_checksum_enabled = true;
spin_lock_init(&efx->netif_stop_lock);
spin_lock_init(&efx->stats_lock);
+ efx->stats_disable_count = 1;
mutex_init(&efx->mac_lock);
efx->mac_op = &efx_dummy_mac_operations;
efx->phy_op = &efx_dummy_phy_operations;