[dpdk-stable] patch 'net/mlx5: fix representor interrupts handler' has been queued to stable release 19.11.6

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 19.11.6

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 11/26/20. 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/08e7b069e6c72c91f93305cdd89459af8fbd4ca4

Thanks.

Luca Boccassi

---
>From 08e7b069e6c72c91f93305cdd89459af8fbd4ca4 Mon Sep 17 00:00:00 2001
From: Gregory Etelson <getelson at nvidia.com>
Date: Tue, 17 Nov 2020 20:49:40 +0200
Subject: [PATCH] net/mlx5: fix representor interrupts handler

[ upstream commit 5882bde88da28b82f138676544ca9e807a9124f5 ]

Representor is a port in DPDK that is connected to a VF in such a way
that assuming there are no offload flows, each packet that is sent
from the VF will be received by the corresponding representor. While
each packet that is sent to a representor will be received by the VF.
This is very useful in case of SRIOV mode, where the first packet that
is sent by the VF will be received by the DPDK application which will
decide if this flow should be offloaded to the E-Switch.

Representor shares interrupts handler with host PF over the PCI
address. Therefore, after PF completes its interrupts handler
initialization, no additional actions required for representor.

Fixes: 26c08b979d26 ("net/mlx5: add port representor awareness")

Signed-off-by: Gregory Etelson <getelson at nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo at nvidia.com>
---
 drivers/net/mlx5/mlx5_rxq.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c
index f3c2d99c15..104687db39 100644
--- a/drivers/net/mlx5/mlx5_rxq.c
+++ b/drivers/net/mlx5/mlx5_rxq.c
@@ -723,6 +723,9 @@ mlx5_rx_intr_vec_enable(struct rte_eth_dev *dev)
 	unsigned int count = 0;
 	struct rte_intr_handle *intr_handle = dev->intr_handle;
 
+	/* Representor shares dev->intr_handle with PF. */
+	if (priv->representor)
+		return 0;
 	if (!dev->data->dev_conf.intr_conf.rxq)
 		return 0;
 	mlx5_rx_intr_vec_disable(dev);
@@ -800,6 +803,9 @@ mlx5_rx_intr_vec_disable(struct rte_eth_dev *dev)
 	unsigned int rxqs_n = priv->rxqs_n;
 	unsigned int n = RTE_MIN(rxqs_n, (uint32_t)RTE_MAX_RXTX_INTR_VEC_ID);
 
+	/* Representor shares dev->intr_handle with PF. */
+	if (priv->representor)
+		return;
 	if (!dev->data->dev_conf.intr_conf.rxq)
 		return;
 	if (!intr_handle->intr_vec)
-- 
2.27.0

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2020-11-24 16:50:37.108119220 +0000
+++ 0013-net-mlx5-fix-representor-interrupts-handler.patch	2020-11-24 16:50:36.573496401 +0000
@@ -1 +1 @@
-From 5882bde88da28b82f138676544ca9e807a9124f5 Mon Sep 17 00:00:00 2001
+From 08e7b069e6c72c91f93305cdd89459af8fbd4ca4 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 5882bde88da28b82f138676544ca9e807a9124f5 ]
+
@@ -19 +20,0 @@
-Cc: stable at dpdk.org
@@ -28 +29 @@
-index f298327005..da7a8b3cd7 100644
+index f3c2d99c15..104687db39 100644
@@ -31 +32 @@
-@@ -902,6 +902,9 @@ mlx5_rx_intr_vec_enable(struct rte_eth_dev *dev)
+@@ -723,6 +723,9 @@ mlx5_rx_intr_vec_enable(struct rte_eth_dev *dev)
@@ -41 +42 @@
-@@ -982,6 +985,9 @@ mlx5_rx_intr_vec_disable(struct rte_eth_dev *dev)
+@@ -800,6 +803,9 @@ mlx5_rx_intr_vec_disable(struct rte_eth_dev *dev)