patch 'net/iavf: release large VF when closing device' has been queued to stable release 20.11.9

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 20.11.9

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 06/17/23. 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://github.com/bluca/dpdk-stable

This queued commit can be viewed at:
https://github.com/bluca/dpdk-stable/commit/f6647f1993d0ec599ab9505a150bc0f23ee15a65

Thanks.

Luca Boccassi

---
>From f6647f1993d0ec599ab9505a150bc0f23ee15a65 Mon Sep 17 00:00:00 2001
From: Shiyang He <shiyangx.he at intel.com>
Date: Mon, 8 May 2023 16:58:23 +0000
Subject: [PATCH] net/iavf: release large VF when closing device

[ upstream commit cdd8d6dfd156709b05ce363d7c5f491cc927330a ]

Multiple vfs created based on one PF. If one of the vf requests a large
number of queues, the queue resources are not released when exiting the
program, resulting in these queues cannot be available to other vfs.

This commit fixes the issue by resetting the number of queues to default
when closing the dev (refer to the kernel driver) .

Fixes: e436cd43835b ("net/iavf: negotiate large VF and request more queues")

Signed-off-by: Shiyang He <shiyangx.he at intel.com>
Acked-by: Qi Zhang <qi.z.zhang at intel.com>
---
 drivers/net/iavf/iavf_ethdev.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c
index 0cb2a457a2..746f6fc335 100644
--- a/drivers/net/iavf/iavf_ethdev.c
+++ b/drivers/net/iavf/iavf_ethdev.c
@@ -2087,6 +2087,18 @@ iavf_dev_close(struct rte_eth_dev *dev)
 	if (vf->promisc_unicast_enabled || vf->promisc_multicast_enabled)
 		iavf_config_promisc(adapter, false, false);
 
+	/*
+	 * Release redundant queue resource when close the dev
+	 * so that other vfs can re-use the queues.
+	 */
+	if (vf->lv_enabled) {
+		ret = iavf_request_queues(dev, IAVF_MAX_NUM_QUEUES_DFLT);
+		if (ret)
+			PMD_DRV_LOG(ERR, "Reset the num of queues failed");
+
+		vf->max_rss_qregion = IAVF_MAX_NUM_QUEUES_DFLT;
+	}
+
 	iavf_shutdown_adminq(hw);
 	/* disable uio intr before callback unregister */
 	rte_intr_disable(intr_handle);
-- 
2.39.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2023-06-15 01:56:37.525555025 +0100
+++ 0056-net-iavf-release-large-VF-when-closing-device.patch	2023-06-15 01:56:34.711544450 +0100
@@ -1 +1 @@
-From cdd8d6dfd156709b05ce363d7c5f491cc927330a Mon Sep 17 00:00:00 2001
+From f6647f1993d0ec599ab9505a150bc0f23ee15a65 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit cdd8d6dfd156709b05ce363d7c5f491cc927330a ]
+
@@ -14 +15,0 @@
-Cc: stable at dpdk.org
@@ -23 +24 @@
-index f6d68403ce..9c55eaa66e 100644
+index 0cb2a457a2..746f6fc335 100644
@@ -26 +27 @@
-@@ -2735,6 +2735,18 @@ iavf_dev_close(struct rte_eth_dev *dev)
+@@ -2087,6 +2087,18 @@ iavf_dev_close(struct rte_eth_dev *dev)
@@ -43,2 +44,2 @@
- 	if (vf->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_WB_ON_ITR) {
- 		/* disable uio intr before callback unregister */
+ 	/* disable uio intr before callback unregister */
+ 	rte_intr_disable(intr_handle);