diff options
Diffstat (limited to 'drivers/net/sfc/efx.c')
| -rw-r--r-- | drivers/net/sfc/efx.c | 59 |
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; |