patch 'baseband/acc: fix memory barrier' has been queued to stable release 22.11.6

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 22.11.6

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 06/27/24. 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/d47135efe7ed109c90c806899b4a6c7f022388b4

Thanks.

Luca Boccassi

---
>From d47135efe7ed109c90c806899b4a6c7f022388b4 Mon Sep 17 00:00:00 2001
From: Hernan Vargas <hernan.vargas at intel.com>
Date: Thu, 2 May 2024 13:45:44 -0700
Subject: [PATCH] baseband/acc: fix memory barrier

[ upstream commit 0a200a3a29017f6b01a481776a571a75e03a32ce ]

Moving memory barrier so that dequeue thread can be in sync with enqueue
thread.

Fixes: 32e8b7ea35dd ("baseband/acc100: refactor to segregate common code")

Signed-off-by: Hernan Vargas <hernan.vargas at intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin at redhat.com>
---
 drivers/baseband/acc/acc_common.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/baseband/acc/acc_common.h b/drivers/baseband/acc/acc_common.h
index 9336d3fbcf..7ea3cc9a02 100644
--- a/drivers/baseband/acc/acc_common.h
+++ b/drivers/baseband/acc/acc_common.h
@@ -964,6 +964,9 @@ acc_dma_enqueue(struct acc_queue *q, uint16_t n,
 				req_elem_addr,
 				(void *)q->mmio_reg_enqueue);
 
+		q->aq_enqueued++;
+		q->sw_ring_head += enq_batch_size;
+
 		rte_wmb();
 
 #ifdef RTE_BBDEV_OFFLOAD_COST
@@ -978,8 +981,6 @@ acc_dma_enqueue(struct acc_queue *q, uint16_t n,
 				rte_rdtsc_precise() - start_time;
 #endif
 
-		q->aq_enqueued++;
-		q->sw_ring_head += enq_batch_size;
 		n -= enq_batch_size;
 
 	} while (n);
-- 
2.39.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2024-06-25 00:22:16.331479882 +0100
+++ 0047-baseband-acc-fix-memory-barrier.patch	2024-06-25 00:22:13.177185486 +0100
@@ -1 +1 @@
-From 0a200a3a29017f6b01a481776a571a75e03a32ce Mon Sep 17 00:00:00 2001
+From d47135efe7ed109c90c806899b4a6c7f022388b4 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 0a200a3a29017f6b01a481776a571a75e03a32ce ]
+
@@ -10 +11,0 @@
-Cc: stable at dpdk.org
@@ -19 +20 @@
-index fddeb0737b..e249f37e38 100644
+index 9336d3fbcf..7ea3cc9a02 100644
@@ -22 +23 @@
-@@ -1112,6 +1112,9 @@ acc_dma_enqueue(struct acc_queue *q, uint16_t n,
+@@ -964,6 +964,9 @@ acc_dma_enqueue(struct acc_queue *q, uint16_t n,
@@ -31,4 +32,4 @@
- 		/* Start time measurement for enqueue function offload. */
-@@ -1122,8 +1125,6 @@ acc_dma_enqueue(struct acc_queue *q, uint16_t n,
- 
- 		queue_stats->acc_offload_cycles += rte_rdtsc_precise() - start_time;
+ #ifdef RTE_BBDEV_OFFLOAD_COST
+@@ -978,8 +981,6 @@ acc_dma_enqueue(struct acc_queue *q, uint16_t n,
+ 				rte_rdtsc_precise() - start_time;
+ #endif