[dpdk-stable] patch 'net/i40e: fix parsing packet type for NEON' has been queued to stable release 20.11.2

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 20.11.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/12/21. 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/steevenlee/dpdk

This queued commit can be viewed at:
https://github.com/steevenlee/dpdk/commit/7f8de7322818b057d8c0dd24ebbd2ef8ab6b9a39

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From 7f8de7322818b057d8c0dd24ebbd2ef8ab6b9a39 Mon Sep 17 00:00:00 2001
From: Feifei Wang <feifei.wang2 at arm.com>
Date: Wed, 10 Mar 2021 10:40:29 +0800
Subject: [PATCH] net/i40e: fix parsing packet type for NEON
Cc: Luca Boccassi <bluca at debian.org>

[ upstream commit 31d7c6f7d424c533b0a4dd9b4408b814ac7852f1 ]

In i40e NEON vector Rx path, the packet descs processing is incorrect.
This caused wrong packet type been filled in mbuf.

To fix this, when shifting the pktlen field to be 16-bit aligned, it
only needs to process the high 16bit of the packet descs instead of
the high 32bit.

Test Results:
Architecture: arm64
NIC: XL710
Driver: i40e
Package: Ether()/IP()/

Without this patch:
desc_to_ptype_v: ptype = 7 (error)

With this patch:
desc_to_ptype_v: ptype = 23 (correct)

Fixes: ae0eb310f253 ("net/i40e: implement vector PMD for ARM")

Signed-off-by: Feifei Wang <feifei.wang2 at arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang at arm.com>
Tested-by: Kathleen Capella <kathleen.capella at arm.com>
---
 drivers/net/i40e/i40e_rxtx_vec_neon.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/drivers/net/i40e/i40e_rxtx_vec_neon.c b/drivers/net/i40e/i40e_rxtx_vec_neon.c
index f094de69ae..edb202a51a 100644
--- a/drivers/net/i40e/i40e_rxtx_vec_neon.c
+++ b/drivers/net/i40e/i40e_rxtx_vec_neon.c
@@ -310,10 +310,16 @@ _recv_raw_pkts_vec(struct i40e_rx_queue *__rte_restrict rxq,
 		/* pkt 3,4 shift the pktlen field to be 16-bit aligned*/
 		uint32x4_t len3 = vshlq_u32(vreinterpretq_u32_u64(descs[3]),
 					    len_shl);
-		descs[3] = vreinterpretq_u64_u32(len3);
+		descs[3] = vreinterpretq_u64_u16(vsetq_lane_u16
+				(vgetq_lane_u16(vreinterpretq_u16_u32(len3), 7),
+				 vreinterpretq_u16_u64(descs[3]),
+				 7));
 		uint32x4_t len2 = vshlq_u32(vreinterpretq_u32_u64(descs[2]),
 					    len_shl);
-		descs[2] = vreinterpretq_u64_u32(len2);
+		descs[2] = vreinterpretq_u64_u16(vsetq_lane_u16
+				(vgetq_lane_u16(vreinterpretq_u16_u32(len2), 7),
+				 vreinterpretq_u16_u64(descs[2]),
+				 7));
 
 		/* D.1 pkt 3,4 convert format from desc to pktmbuf */
 		pkt_mb4 = vqtbl1q_u8(vreinterpretq_u8_u64(descs[3]), shuf_msk);
@@ -341,10 +347,16 @@ _recv_raw_pkts_vec(struct i40e_rx_queue *__rte_restrict rxq,
 		/* pkt 1,2 shift the pktlen field to be 16-bit aligned*/
 		uint32x4_t len1 = vshlq_u32(vreinterpretq_u32_u64(descs[1]),
 					    len_shl);
-		descs[1] = vreinterpretq_u64_u32(len1);
+		descs[1] = vreinterpretq_u64_u16(vsetq_lane_u16
+				(vgetq_lane_u16(vreinterpretq_u16_u32(len1), 7),
+				 vreinterpretq_u16_u64(descs[1]),
+				 7));
 		uint32x4_t len0 = vshlq_u32(vreinterpretq_u32_u64(descs[0]),
 					    len_shl);
-		descs[0] = vreinterpretq_u64_u32(len0);
+		descs[0] = vreinterpretq_u64_u16(vsetq_lane_u16
+				(vgetq_lane_u16(vreinterpretq_u16_u32(len0), 7),
+				 vreinterpretq_u16_u64(descs[0]),
+				 7));
 
 		/* D.1 pkt 1,2 convert format from desc to pktmbuf */
 		pkt_mb2 = vqtbl1q_u8(vreinterpretq_u8_u64(descs[1]), shuf_msk);
-- 
2.25.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-05-10 23:59:29.529515200 +0800
+++ 0113-net-i40e-fix-parsing-packet-type-for-NEON.patch	2021-05-10 23:59:26.510000000 +0800
@@ -1 +1 @@
-From 31d7c6f7d424c533b0a4dd9b4408b814ac7852f1 Mon Sep 17 00:00:00 2001
+From 7f8de7322818b057d8c0dd24ebbd2ef8ab6b9a39 Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Luca Boccassi <bluca at debian.org>
+
+[ upstream commit 31d7c6f7d424c533b0a4dd9b4408b814ac7852f1 ]
@@ -26 +28,0 @@
-Cc: stable at dpdk.org
@@ -36 +38 @@
-index da16dfc386..1f5539bda8 100644
+index f094de69ae..edb202a51a 100644