netdev - [PATCH net 3/6] qed: Consider TX tcs while deriving the max num

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Date:   Wed, 6 Feb 2019 14:43:44 -0800
From:   Manish Chopra <manishc@...vell.com>
To:     <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>, <aelior@...vell.com>,
        <mkalderon@...vell.com>,
        Sudarsana Reddy Kalluru <skalluru@...vell.com>
Subject: [PATCH net 3/6] qed: Consider TX tcs while deriving the max num_queues for PF.

From: Sudarsana Reddy Kalluru <skalluru@...vell.com>

Max supported queues is derived incorrectly in the case of multi-CoS.
Need to consider TCs while calculating num_queues for PF.

Signed-off-by: Sudarsana Reddy Kalluru <skalluru@...vell.com>
Signed-off-by: Ariel Elior <aelior@...vell.com>
---
 drivers/net/ethernet/qlogic/qed/qed_l2.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/qlogic/qed/qed_l2.c b/drivers/net/ethernet/qlogic/qed/qed_l2.c
index e68ca83..64ac95c 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_l2.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_l2.c
@@ -2216,7 +2216,7 @@ static int qed_fill_eth_dev_info(struct qed_dev *cdev,
 			u16 num_queues = 0;
 
 			/* Since the feature controls only queue-zones,
-			 * make sure we have the contexts [rx, tx, xdp] to
+			 * make sure we have the contexts [rx, xdp, tcs] to
 			 * match.
 			 */
 			for_each_hwfn(cdev, i) {
@@ -2226,7 +2226,8 @@ static int qed_fill_eth_dev_info(struct qed_dev *cdev,
 				u16 cids;
 
 				cids = hwfn->pf_params.eth_pf_params.num_cons;
-				num_queues += min_t(u16, l2_queues, cids / 3);
+				cids /= (2 + info->num_tc);
+				num_queues += min_t(u16, l2_queues, cids);
 			}
 
 			/* queues might theoretically be >256, but interrupts'
-- 
1.8.3.1