[dpdk-stable] patch 'bus/fslmc: fix random portal hangs with qbman 5.0' 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/1965f4ee95941d134ce4f5751ee16fb37bfd9198

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From 1965f4ee95941d134ce4f5751ee16fb37bfd9198 Mon Sep 17 00:00:00 2001
From: Youri Querry <youri.querry_1 at nxp.com>
Date: Wed, 24 Feb 2021 18:12:49 +0530
Subject: [PATCH] bus/fslmc: fix random portal hangs with qbman 5.0
Cc: Luca Boccassi <bluca at debian.org>

[ upstream commit a675f35d784115bb2a746daa94b6b5ab6305298f ]

Random portal hangs observed on device with QBMAN 5.0

This fixes few random packet hang issues in event mode.
Few things fixed it.
1. Generally, pi == ci, no need for extra checks.
2. The proper initializations in init with ci

Fixes: 1b49352f41be ("bus/fslmc: rename portal pi index to consumer index")

Signed-off-by: Youri Querry <youri.querry_1 at nxp.com>
Acked-by: Hemant Agrawal <hemant.agrawal at nxp.com>
---
 drivers/bus/fslmc/qbman/qbman_portal.c | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/drivers/bus/fslmc/qbman/qbman_portal.c b/drivers/bus/fslmc/qbman/qbman_portal.c
index 77c9d508c4..aedcad9258 100644
--- a/drivers/bus/fslmc/qbman/qbman_portal.c
+++ b/drivers/bus/fslmc/qbman/qbman_portal.c
@@ -339,17 +339,9 @@ struct qbman_swp *qbman_swp_init(const struct qbman_swp_desc *d)
 	eqcr_pi = qbman_cinh_read(&p->sys, QBMAN_CINH_SWP_EQCR_PI);
 	p->eqcr.pi = eqcr_pi & p->eqcr.pi_ci_mask;
 	p->eqcr.pi_vb = eqcr_pi & QB_VALID_BIT;
-	if ((p->desc.qman_version & QMAN_REV_MASK) >= QMAN_REV_5000
-			&& (d->cena_access_mode == qman_cena_fastest_access))
-		p->eqcr.ci = qbman_cinh_read(&p->sys, QBMAN_CINH_SWP_EQCR_PI)
-					     & p->eqcr.pi_ci_mask;
-	else
-		p->eqcr.ci = qbman_cinh_read(&p->sys, QBMAN_CINH_SWP_EQCR_CI)
-					     & p->eqcr.pi_ci_mask;
-	p->eqcr.available = p->eqcr.pi_ring_size -
-				qm_cyc_diff(p->eqcr.pi_ring_size,
-				p->eqcr.ci & (p->eqcr.pi_ci_mask<<1),
-				p->eqcr.pi & (p->eqcr.pi_ci_mask<<1));
+	p->eqcr.ci = qbman_cinh_read(&p->sys, QBMAN_CINH_SWP_EQCR_CI)
+			& p->eqcr.pi_ci_mask;
+	p->eqcr.available = p->eqcr.pi_ring_size;
 
 	portal_idx_map[p->desc.idx] = p;
 	return p;
-- 
2.25.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-05-10 23:59:27.013875500 +0800
+++ 0012-bus-fslmc-fix-random-portal-hangs-with-qbman-5.0.patch	2021-05-10 23:59:26.320000000 +0800
@@ -1 +1 @@
-From a675f35d784115bb2a746daa94b6b5ab6305298f Mon Sep 17 00:00:00 2001
+From 1965f4ee95941d134ce4f5751ee16fb37bfd9198 Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Luca Boccassi <bluca at debian.org>
+
+[ upstream commit a675f35d784115bb2a746daa94b6b5ab6305298f ]
@@ -14 +16,0 @@
-Cc: stable at dpdk.org