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