[net-next-2.6,13/23] igb: change queue ordering for 82576 based adapters

Submitted by Jeff Kirsher on Oct. 28, 2009, 9:49 a.m.

Details

Message ID 20091028094939.13156.75956.stgit@localhost.localdomain
State Accepted
Delegated to: David Miller
Headers show

Commit Message

Jeff Kirsher Oct. 28, 2009, 9:49 a.m.
From: Alexander Duyck <alexander.h.duyck@intel.com>

This patch changes the queue ordering for 82576 adapters so that if VFs are
enabled the queues will first be allocated out of the PF pool.  Any
remaining queues will be allocated out of other VMDq pools.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

 drivers/net/igb/igb_main.c |   25 +++++++++++++------------
 1 files changed, 13 insertions(+), 12 deletions(-)


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diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index e67ff0e..52c4302 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -285,7 +285,7 @@  module_exit(igb_exit_module);
  **/
 static void igb_cache_ring_register(struct igb_adapter *adapter)
 {
-	int i;
+	int i = 0, j = 0;
 	u32 rbase_offset = adapter->vfs_allocated_count;
 
 	switch (adapter->hw.mac.type) {
@@ -295,19 +295,20 @@  static void igb_cache_ring_register(struct igb_adapter *adapter)
 		 * In order to avoid collision we start at the first free queue
 		 * and continue consuming queues in the same sequence
 		 */
-		for (i = 0; i < adapter->num_rx_queues; i++)
-			adapter->rx_ring[i].reg_idx = rbase_offset +
-			                              Q_IDX_82576(i);
-		for (i = 0; i < adapter->num_tx_queues; i++)
-			adapter->tx_ring[i].reg_idx = rbase_offset +
-			                              Q_IDX_82576(i);
-		break;
+		if (adapter->vfs_allocated_count) {
+			for (; i < adapter->num_rx_queues; i++)
+				adapter->rx_ring[i].reg_idx = rbase_offset +
+				                              Q_IDX_82576(i);
+			for (; j < adapter->num_tx_queues; j++)
+				adapter->tx_ring[j].reg_idx = rbase_offset +
+				                              Q_IDX_82576(j);
+		}
 	case e1000_82575:
 	default:
-		for (i = 0; i < adapter->num_rx_queues; i++)
-			adapter->rx_ring[i].reg_idx = i;
-		for (i = 0; i < adapter->num_tx_queues; i++)
-			adapter->tx_ring[i].reg_idx = i;
+		for (; i < adapter->num_rx_queues; i++)
+			adapter->rx_ring[i].reg_idx = rbase_offset + i;
+		for (; j < adapter->num_tx_queues; j++)
+			adapter->tx_ring[j].reg_idx = rbase_offset + j;
 		break;
 	}
 }