From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Kirsher Subject: [net-next 11/16] ixgbe: setup redirection table for multiple packet buffers Date: Tue, 21 Jun 2011 01:33:43 -0700 Message-ID: <1308645228-32444-12-git-send-email-jeffrey.t.kirsher@intel.com> References: <1308645228-32444-1-git-send-email-jeffrey.t.kirsher@intel.com> Cc: John Fastabend , netdev@vger.kernel.org, gospo@redhat.com, Jeff Kirsher To: davem@davemloft.net Return-path: Received: from mga01.intel.com ([192.55.52.88]:34699 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754007Ab1FUIeE (ORCPT ); Tue, 21 Jun 2011 04:34:04 -0400 In-Reply-To: <1308645228-32444-1-git-send-email-jeffrey.t.kirsher@intel.com> Sender: netdev-owner@vger.kernel.org List-ID: From: John Fastabend 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 --- drivers/net/ixgbe/ixgbe_main.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-) 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. */ -- 1.7.5.4