diff mbox series

net/mlx5: fix switchdev mode recognition

Message ID 20210611153719.30210-1-viacheslavo@nvidia.com (mailing list archive)
State Accepted
Delegated to: Raslan Darawsheh
Headers show
Series net/mlx5: fix switchdev mode recognition | expand

Checks

Context Check Description
ci/iol-testing success Testing PASS
ci/iol-abi-testing success Testing PASS
ci/github-robot success github build: passed
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-intel-Functional success Functional Testing PASS
ci/intel-Testing success Testing PASS
ci/Intel-compilation success Compilation OK
ci/checkpatch warning coding style issues

Commit Message

Viacheslav Ovsiienko June 11, 2021, 3:37 p.m. UTC
The new kernels might add the switch_id attribute to the
Netlink replies and this caused the wrong recognition
of the E-Switch presence. The single uplink device was
erroneously recognized as master and it caused the
extending match for source vport index on all installed
flows, including the default ones, and adding extra hops
in the steering engine, that affected the maximal
throughput packet rate.

The extra check for the new device name format (it supposes
the new kernel) and the device is only one is added. If this
check succeeds the E-Switch presence is considered as wrongly
detected and overridden.

Fixes: 30a86157f6d5 ("net/mlx5: support PF representor")
Cc: stable@dpdk.org

Signed-off-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
---
 drivers/net/mlx5/linux/mlx5_os.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

Comments

Matan Azrad June 13, 2021, 9:12 a.m. UTC | #1
From: Slava Ovsiienko
> The new kernels might add the switch_id attribute to the Netlink replies and
> this caused the wrong recognition of the E-Switch presence. The single uplink
> device was erroneously recognized as master and it caused the extending
> match for source vport index on all installed flows, including the default ones,
> and adding extra hops in the steering engine, that affected the maximal
> throughput packet rate.
> 
> The extra check for the new device name format (it supposes the new
> kernel) and the device is only one is added. If this check succeeds the E-
> Switch presence is considered as wrongly detected and overridden.
> 
> Fixes: 30a86157f6d5 ("net/mlx5: support PF representor")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>
Raslan Darawsheh June 15, 2021, 11:01 a.m. UTC | #2
Hi,

> -----Original Message-----
> From: Slava Ovsiienko <viacheslavo@nvidia.com>
> Sent: Friday, June 11, 2021 6:37 PM
> To: dev@dpdk.org
> Cc: Raslan Darawsheh <rasland@nvidia.com>; Matan Azrad
> <matan@nvidia.com>; stable@dpdk.org
> Subject: [PATCH] net/mlx5: fix switchdev mode recognition
> 
> The new kernels might add the switch_id attribute to the Netlink replies and
> this caused the wrong recognition of the E-Switch presence. The single uplink
> device was erroneously recognized as master and it caused the extending
> match for source vport index on all installed flows, including the default ones,
> and adding extra hops in the steering engine, that affected the maximal
> throughput packet rate.
> 
> The extra check for the new device name format (it supposes the new
> kernel) and the device is only one is added. If this check succeeds the E-
> Switch presence is considered as wrongly detected and overridden.
> 
> Fixes: 30a86157f6d5 ("net/mlx5: support PF representor")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>

Patch applied to next-net-mlx,

Kindest regards,
Raslan Darawsheh
diff mbox series

Patch

diff --git a/drivers/net/mlx5/linux/mlx5_os.c b/drivers/net/mlx5/linux/mlx5_os.c
index 54e4a1fe60..92b3009786 100644
--- a/drivers/net/mlx5/linux/mlx5_os.c
+++ b/drivers/net/mlx5/linux/mlx5_os.c
@@ -2290,6 +2290,18 @@  mlx5_os_pci_probe_pf(struct rte_pci_device *pci_dev,
 			ret = -rte_errno;
 			goto exit;
 		}
+		/*
+		 * New kernels may add the switch_id attribute for the case
+		 * there is no E-Switch and we wrongly recognized the
+		 * only device as master. Override this if there is the
+		 * single device with single port and new device name
+		 * format present.
+		 */
+		if (nd == 1 &&
+		    list[0].info.name_type == MLX5_PHYS_PORT_NAME_TYPE_UPLINK) {
+			list[0].info.master = 0;
+			list[0].info.representor = 0;
+		}
 	}
 	MLX5_ASSERT(ns);
 	/*