patch 'dma/ioat: fix indexes after restart' has been queued to stable release 22.11.2

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 22.11.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 03/01/23. 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://git.dpdk.org/dpdk-stable/log/?h=22.11-staging

This queued commit can be viewed at:
https://git.dpdk.org/dpdk-stable/commit/?h=22.11-staging&id=90ad21e9881ec3231f54801042d179811299be40

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From 90ad21e9881ec3231f54801042d179811299be40 Mon Sep 17 00:00:00 2001
From: Bruce Richardson <bruce.richardson at intel.com>
Date: Thu, 16 Feb 2023 11:09:15 +0000
Subject: [PATCH] dma/ioat: fix indexes after restart
Cc: Xueming Li <xuemingl at nvidia.com>

[ upstream commit 79ab0f29dd9d734d0caf56e7694d7b0c6ead12e2 ]

As part of the process of restarting a dma instance, the IOAT driver
will reset the HW addresses and state values. The read and write
indexes for SW use need to be similarly reset to keep HW and SW in
sync.

Fixes: 583f046dd404 ("dma/ioat: add start and stop")

Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>
Reviewed-by: Conor Walsh <conor.walsh at intel.com>
Acked-by: Kevin Laatz <kevin.laatz at intel.com>
---
 drivers/dma/ioat/ioat_dmadev.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/dma/ioat/ioat_dmadev.c b/drivers/dma/ioat/ioat_dmadev.c
index aff7bbbfde..072eb17cd9 100644
--- a/drivers/dma/ioat/ioat_dmadev.c
+++ b/drivers/dma/ioat/ioat_dmadev.c
@@ -146,6 +146,13 @@ ioat_dev_start(struct rte_dma_dev *dev)
 	/* Prime the status register to be set to the last element. */
 	ioat->status = ioat->ring_addr + ((ioat->qcfg.nb_desc - 1) * DESC_SZ);

+	/* reset all counters */
+	ioat->next_read = 0;
+	ioat->next_write = 0;
+	ioat->last_write = 0;
+	ioat->offset = 0;
+	ioat->failure = 0;
+
 	printf("IOAT.status: %s [0x%"PRIx64"]\n",
 			chansts_readable[ioat->status & IOAT_CHANSTS_STATUS],
 			ioat->status);
--
2.25.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2023-02-27 14:08:45.732596000 +0800
+++ 0153-dma-ioat-fix-indexes-after-restart.patch	2023-02-27 14:08:40.959237000 +0800
@@ -1 +1 @@
-From 79ab0f29dd9d734d0caf56e7694d7b0c6ead12e2 Mon Sep 17 00:00:00 2001
+From 90ad21e9881ec3231f54801042d179811299be40 Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Xueming Li <xuemingl at nvidia.com>
+
+[ upstream commit 79ab0f29dd9d734d0caf56e7694d7b0c6ead12e2 ]
@@ -12 +14,0 @@
-Cc: stable at dpdk.org