diff options
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/ixgb/ixgb.h | 1 | ||||
-rw-r--r-- | drivers/net/ixgb/ixgb_ethtool.c | 1 | ||||
-rw-r--r-- | drivers/net/ixgb/ixgb_main.c | 37 |
3 files changed, 36 insertions, 3 deletions
diff --git a/drivers/net/ixgb/ixgb.h b/drivers/net/ixgb/ixgb.h index 50ffe90488f..f4aba4355b1 100644 --- a/drivers/net/ixgb/ixgb.h +++ b/drivers/net/ixgb/ixgb.h | |||
@@ -171,6 +171,7 @@ struct ixgb_adapter { | |||
171 | 171 | ||
172 | /* TX */ | 172 | /* TX */ |
173 | struct ixgb_desc_ring tx_ring ____cacheline_aligned_in_smp; | 173 | struct ixgb_desc_ring tx_ring ____cacheline_aligned_in_smp; |
174 | unsigned int restart_queue; | ||
174 | unsigned long timeo_start; | 175 | unsigned long timeo_start; |
175 | uint32_t tx_cmd_type; | 176 | uint32_t tx_cmd_type; |
176 | uint64_t hw_csum_tx_good; | 177 | uint64_t hw_csum_tx_good; |
diff --git a/drivers/net/ixgb/ixgb_ethtool.c b/drivers/net/ixgb/ixgb_ethtool.c index cd22523fb03..82c044d6e08 100644 --- a/drivers/net/ixgb/ixgb_ethtool.c +++ b/drivers/net/ixgb/ixgb_ethtool.c | |||
@@ -79,6 +79,7 @@ static struct ixgb_stats ixgb_gstrings_stats[] = { | |||
79 | {"tx_window_errors", IXGB_STAT(net_stats.tx_window_errors)}, | 79 | {"tx_window_errors", IXGB_STAT(net_stats.tx_window_errors)}, |
80 | {"tx_deferred_ok", IXGB_STAT(stats.dc)}, | 80 | {"tx_deferred_ok", IXGB_STAT(stats.dc)}, |
81 | {"tx_timeout_count", IXGB_STAT(tx_timeout_count) }, | 81 | {"tx_timeout_count", IXGB_STAT(tx_timeout_count) }, |
82 | {"tx_restart_queue", IXGB_STAT(restart_queue) }, | ||
82 | {"rx_long_length_errors", IXGB_STAT(stats.roc)}, | 83 | {"rx_long_length_errors", IXGB_STAT(stats.roc)}, |
83 | {"rx_short_length_errors", IXGB_STAT(stats.ruc)}, | 84 | {"rx_short_length_errors", IXGB_STAT(stats.ruc)}, |
84 | #ifdef NETIF_F_TSO | 85 | #ifdef NETIF_F_TSO |
diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c index 70ac9d4a83b..16317b58f74 100644 --- a/drivers/net/ixgb/ixgb_main.c +++ b/drivers/net/ixgb/ixgb_main.c | |||
@@ -1411,6 +1411,37 @@ ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags) | |||
1411 | IXGB_WRITE_REG(&adapter->hw, TDT, i); | 1411 | IXGB_WRITE_REG(&adapter->hw, TDT, i); |
1412 | } | 1412 | } |
1413 | 1413 | ||
1414 | static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size) | ||
1415 | { | ||
1416 | struct ixgb_adapter *adapter = netdev_priv(netdev); | ||
1417 | struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; | ||
1418 | |||
1419 | netif_stop_queue(netdev); | ||
1420 | /* Herbert's original patch had: | ||
1421 | * smp_mb__after_netif_stop_queue(); | ||
1422 | * but since that doesn't exist yet, just open code it. */ | ||
1423 | smp_mb(); | ||
1424 | |||
1425 | /* We need to check again in a case another CPU has just | ||
1426 | * made room available. */ | ||
1427 | if (likely(IXGB_DESC_UNUSED(tx_ring) < size)) | ||
1428 | return -EBUSY; | ||
1429 | |||
1430 | /* A reprieve! */ | ||
1431 | netif_start_queue(netdev); | ||
1432 | ++adapter->restart_queue; | ||
1433 | return 0; | ||
1434 | } | ||
1435 | |||
1436 | static int ixgb_maybe_stop_tx(struct net_device *netdev, | ||
1437 | struct ixgb_desc_ring *tx_ring, int size) | ||
1438 | { | ||
1439 | if (likely(IXGB_DESC_UNUSED(tx_ring) >= size)) | ||
1440 | return 0; | ||
1441 | return __ixgb_maybe_stop_tx(netdev, size); | ||
1442 | } | ||
1443 | |||
1444 | |||
1414 | /* Tx Descriptors needed, worst case */ | 1445 | /* Tx Descriptors needed, worst case */ |
1415 | #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \ | 1446 | #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \ |
1416 | (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0)) | 1447 | (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0)) |
@@ -1444,7 +1475,8 @@ ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev) | |||
1444 | spin_lock_irqsave(&adapter->tx_lock, flags); | 1475 | spin_lock_irqsave(&adapter->tx_lock, flags); |
1445 | #endif | 1476 | #endif |
1446 | 1477 | ||
1447 | if(unlikely(IXGB_DESC_UNUSED(&adapter->tx_ring) < DESC_NEEDED)) { | 1478 | if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, |
1479 | DESC_NEEDED))) { | ||
1448 | netif_stop_queue(netdev); | 1480 | netif_stop_queue(netdev); |
1449 | spin_unlock_irqrestore(&adapter->tx_lock, flags); | 1481 | spin_unlock_irqrestore(&adapter->tx_lock, flags); |
1450 | return NETDEV_TX_BUSY; | 1482 | return NETDEV_TX_BUSY; |
@@ -1482,8 +1514,7 @@ ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev) | |||
1482 | 1514 | ||
1483 | #ifdef NETIF_F_LLTX | 1515 | #ifdef NETIF_F_LLTX |
1484 | /* Make sure there is space in the ring for the next send. */ | 1516 | /* Make sure there is space in the ring for the next send. */ |
1485 | if(unlikely(IXGB_DESC_UNUSED(&adapter->tx_ring) < DESC_NEEDED)) | 1517 | ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED); |
1486 | netif_stop_queue(netdev); | ||
1487 | 1518 | ||
1488 | spin_unlock_irqrestore(&adapter->tx_lock, flags); | 1519 | spin_unlock_irqrestore(&adapter->tx_lock, flags); |
1489 | 1520 | ||