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authorDavid S. Miller <davem@davemloft.net>2008-07-17 01:56:23 -0700
committerDavid S. Miller <davem@davemloft.net>2008-07-17 19:21:07 -0700
commitfd2ea0a79faad824258af5dcec1927aa24d81c16 (patch)
tree644fd4ce92227cc319c7a54c63ea07a96b8c6b8d /drivers/net/igb
parent24344d2600108b9b79a60c0e4c43b3c499856d14 (diff)
net: Use queue aware tests throughout.
This effectively "flips the switch" by making the core networking and multiqueue-aware drivers use the new TX multiqueue structures. Non-multiqueue drivers need no changes. The interfaces they use such as netif_stop_queue() degenerate into an operation on TX queue zero. So everything "just works" for them. Code that really wants to do "X" to all TX queues now invokes a routine that does so, such as netif_tx_wake_all_queues(), netif_tx_stop_all_queues(), etc. pktgen and netpoll required a little bit more surgery than the others. In particular the pktgen changes, whilst functional, could be largely improved. The initial check in pktgen_xmit() will sometimes check the wrong queue, which is mostly harmless. The thing to do is probably to invoke fill_packet() earlier. The bulk of the netpoll changes is to make the code operate solely on the TX queue indicated by by the SKB queue mapping. Setting of the SKB queue mapping is entirely confined inside of net/core/dev.c:dev_pick_tx(). If we end up needing any kind of special semantics (drops, for example) it will be implemented here. Finally, we now have a "real_num_tx_queues" which is where the driver indicates how many TX queues are actually active. With IGB changes from Jeff Kirsher. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/igb')
-rw-r--r--drivers/net/igb/igb_main.c19
1 files changed, 5 insertions, 14 deletions
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 471c194cd54e..81bba6983dde 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -533,7 +533,7 @@ msi_only:
adapter->flags |= IGB_FLAG_HAS_MSI;
/* Notify the stack of the (possibly) reduced Tx Queue count. */
- adapter->netdev->egress_subqueue_count = adapter->num_tx_queues;
+ adapter->netdev->real_num_tx_queues = adapter->num_tx_queues;
return;
}
@@ -821,9 +821,7 @@ void igb_down(struct igb_adapter *adapter)
wr32(E1000_RCTL, rctl & ~E1000_RCTL_EN);
/* flush and sleep below */
- netif_stop_queue(netdev);
- for (i = 0; i < adapter->num_tx_queues; i++)
- netif_stop_subqueue(netdev, i);
+ netif_tx_stop_all_queues(netdev);
/* disable transmits in the hardware */
tctl = rd32(E1000_TCTL);
@@ -1266,9 +1264,7 @@ static int __devinit igb_probe(struct pci_dev *pdev,
/* tell the stack to leave us alone until igb_open() is called */
netif_carrier_off(netdev);
- netif_stop_queue(netdev);
- for (i = 0; i < adapter->num_tx_queues; i++)
- netif_stop_subqueue(netdev, i);
+ netif_tx_stop_all_queues(netdev);
strcpy(netdev->name, "eth%d");
err = register_netdev(netdev);
@@ -2315,7 +2311,6 @@ static void igb_watchdog_task(struct work_struct *work)
struct e1000_mac_info *mac = &adapter->hw.mac;
u32 link;
s32 ret_val;
- int i;
if ((netif_carrier_ok(netdev)) &&
(rd32(E1000_STATUS) & E1000_STATUS_LU))
@@ -2371,9 +2366,7 @@ static void igb_watchdog_task(struct work_struct *work)
}
netif_carrier_on(netdev);
- netif_wake_queue(netdev);
- for (i = 0; i < adapter->num_tx_queues; i++)
- netif_wake_subqueue(netdev, i);
+ netif_tx_wake_all_queues(netdev);
if (!test_bit(__IGB_DOWN, &adapter->state))
mod_timer(&adapter->phy_info_timer,
@@ -2385,9 +2378,7 @@ static void igb_watchdog_task(struct work_struct *work)
adapter->link_duplex = 0;
dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
netif_carrier_off(netdev);
- netif_stop_queue(netdev);
- for (i = 0; i < adapter->num_tx_queues; i++)
- netif_stop_subqueue(netdev, i);
+ netif_tx_stop_all_queues(netdev);
if (!test_bit(__IGB_DOWN, &adapter->state))
mod_timer(&adapter->phy_info_timer,
round_jiffies(jiffies + 2 * HZ));