From 20db6bb321f335b527ccf7befb50c50696e37ebf Mon Sep 17 00:00:00 2001 From: Alaa Hleihel Date: Sun, 10 May 2020 14:51:30 -0400 Subject: [PATCH 010/312] [netdrv] net/mlx5e: Tx, Strict the room needed for SQ edge NOPs Message-id: <20200510145245.10054-8-ahleihel@redhat.com> Patchwork-id: 306547 Patchwork-instance: patchwork O-Subject: [RHEL8.3 BZ 1789378 v2 07/82] net/mlx5e: Tx, Strict the room needed for SQ edge NOPs Bugzilla: 1789378 RH-Acked-by: Kamal Heib RH-Acked-by: Jarod Wilson RH-Acked-by: Tony Camuso RH-Acked-by: Jonathan Toppins Bugzilla: http://bugzilla.redhat.com/1789378 Upstream: v5.4-rc1 commit 68865419ba1bf502a5bd279a500deda64000249d Author: Tariq Toukan Date: Thu Jul 11 11:20:22 2019 +0300 net/mlx5e: Tx, Strict the room needed for SQ edge NOPs We use NOPs to populate the WQ fragment edge if the WQE does not fit in frag, to avoid WQEs crossing a page boundary (or wrap-around the WQ). The upper bound on the needed number of NOPs is one WQEBB less than the largest possible WQE, for otherwise the WQE would certainly fit. Signed-off-by: Tariq Toukan Signed-off-by: Saeed Mahameed Signed-off-by: Alaa Hleihel Signed-off-by: Frantisek Hrbata --- drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h b/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h index b495e6a976a1..a7a2cd415e69 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h @@ -6,7 +6,7 @@ #include "en.h" -#define MLX5E_SQ_NOPS_ROOM MLX5_SEND_WQE_MAX_WQEBBS +#define MLX5E_SQ_NOPS_ROOM (MLX5_SEND_WQE_MAX_WQEBBS - 1) #define MLX5E_SQ_STOP_ROOM (MLX5_SEND_WQE_MAX_WQEBBS +\ MLX5E_SQ_NOPS_ROOM) -- 2.13.6