[dpdk-stable] patch 'net/mlx5: fix flow tag decompression' has been queued to stable release 20.11.1

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 20.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 02/07/21. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/bluca/dpdk-stable

This queued commit can be viewed at:
https://github.com/bluca/dpdk-stable/commit/094f59d02aa07cd555084025f0cebc113443f645

Thanks.

Luca Boccassi

---
>From 094f59d02aa07cd555084025f0cebc113443f645 Mon Sep 17 00:00:00 2001
From: Alexander Kozyrev <akozyrev at nvidia.com>
Date: Thu, 14 Jan 2021 21:32:19 +0000
Subject: [PATCH] net/mlx5: fix flow tag decompression

[ upstream commit bd0940a5c4df6a79595adac39959ab8b578ec3a9 ]

Packets can get a wrong Flow Tag on x86 architecture with the Flow Tag
compression format (rxq_cqe_comp_en=2) enabled inside the SSE Rx burst.
The shuffle mask that extracts a Flow Tag from the pair of compressed
CQEs is reversed. This leads to the wrong Flow Tag assignment.
Correct the shuffle mask to get proper bytes for a Flow Tag from
miniCQEs.

Fixes: 54c2d46b160f ("net/mlx5: support flow tag and packet header miniCQEs")

Signed-off-by: Alexander Kozyrev <akozyrev at nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo at nvidia.com>
---
 drivers/net/mlx5/mlx5_rxtx_vec_sse.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_rxtx_vec_sse.h b/drivers/net/mlx5/mlx5_rxtx_vec_sse.h
index d4df9816aa..0b3f240e10 100644
--- a/drivers/net/mlx5/mlx5_rxtx_vec_sse.h
+++ b/drivers/net/mlx5/mlx5_rxtx_vec_sse.h
@@ -197,8 +197,8 @@ rxq_cq_decompress_v(struct mlx5_rxq_data *rxq, volatile struct mlx5_cqe *cq,
 				const __m128i flow_mark_adj =
 					_mm_set_epi32(-1, -1, -1, -1);
 				const __m128i flow_mark_shuf =
-					_mm_set_epi8(-1,  1,  0,  4,
-						     -1,  9,  8, 12,
+					_mm_set_epi8(-1,  9,  8, 12,
+						     -1,  1,  0,  4,
 						     -1, -1, -1, -1,
 						     -1, -1, -1, -1);
 				const __m128i ft_mask =
-- 
2.29.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-02-05 11:18:39.678341077 +0000
+++ 0238-net-mlx5-fix-flow-tag-decompression.patch	2021-02-05 11:18:29.238699337 +0000
@@ -1 +1 @@
-From bd0940a5c4df6a79595adac39959ab8b578ec3a9 Mon Sep 17 00:00:00 2001
+From 094f59d02aa07cd555084025f0cebc113443f645 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit bd0940a5c4df6a79595adac39959ab8b578ec3a9 ]
+
@@ -14 +15,0 @@
-Cc: stable at dpdk.org