From: John Fastabend Date: Tue, 26 Apr 2011 07:26:19 +0000 (+0000) Subject: ixgbe: setup redirection table for multiple packet buffers X-Git-Tag: v3.12-rc1~5334^2~388 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=86b4db3bcce714d6bdd8c056158821301624bf00;p=kernel%2Fkernel-generic.git 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 Tested-by: Ross Brattain Signed-off-by: Jeff Kirsher --- diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c index f829d36..e81dc85 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. */