From 86b4db3bcce714d6bdd8c056158821301624bf00 Mon Sep 17 00:00:00 2001
From: John Fastabend <john.r.fastabend@intel.com>
Date: Tue, 26 Apr 2011 07:26:19 +0000
Subject: [PATCH] ixgbe: setup redirection table for multiple packet buffers
Setup RSS redirection table to be compatible with multiple packet
buffers. Currently, this works on 82599 devices because the RSS
redirection index is masked by the number of queues per packet
buffer.
This sets the cap on the RSS table to maxq.
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
drivers/net/ixgbe/ixgbe_main.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index f829d3614521..e81dc853922b 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -2939,6 +2939,10 @@ static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
u32 rxcsum;
int i, j;
u8 tcs = netdev_get_num_tc(adapter->netdev);
+ int maxq = adapter->ring_feature[RING_F_RSS].indices;
+
+ if (tcs)
+ maxq = min(maxq, adapter->num_tx_queues / tcs);
/* Fill out hash function seeds */
for (i = 0; i < 10; i++)
@@ -2946,7 +2950,7 @@ static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
/* Fill out redirection table */
for (i = 0, j = 0; i < 128; i++, j++) {
- if (j == adapter->ring_feature[RING_F_RSS].indices)
+ if (j == maxq)
j = 0;
/* reta = 4-byte sliding window of
* 0x00..(indices-1)(indices-1)00..etc. */
--
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