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| author | Dmytro Linkin <dlinkin@nvidia.com> | 2021-05-14 11:14:19 +0300 |
|---|---|---|
| committer | Saeed Mahameed <saeedm@nvidia.com> | 2021-06-17 01:36:47 +0300 |
| commit | a5ae8fc9058e37437c8c1f82b3d412b4abd1b9e6 (patch) | |
| tree | ec9fc0e79e881a6a268aff1094bd9feb68e5bd3e /include/linux/mlx5 | |
| parent | 65fb7d109abe3a1a9f1c2d3ba7e1249bc978d5f0 (diff) | |
| download | linux-a5ae8fc9058e37437c8c1f82b3d412b4abd1b9e6.tar.xz | |
net/mlx5e: Don't create devices during unload flow
Running devlink reload command for port in switchdev mode cause
resources to corrupt: driver can't release allocated EQ and reclaim
memory pages, because "rdma" auxiliary device had add CQs which blocks
EQ from deletion.
Erroneous sequence happens during reload-down phase, and is following:
1. detach device - suspends auxiliary devices which support it, destroys
others. During this step "eth-rep" and "rdma-rep" are destroyed,
"eth" - suspended.
2. disable SRIOV - moves device to legacy mode; as part of disablement -
rescans drivers. This step adds "rdma" auxiliary device.
3. destroy EQ table - <failure>.
Driver shouldn't create any device during unload flows. To handle that
implement MLX5_PRIV_FLAGS_DETACH flag, set it on device detach and unset
on device attach. If flag is set do no-op on drivers rescan.
Fixes: a925b5e309c9 ("net/mlx5: Register mlx5 devices to auxiliary virtual bus")
Signed-off-by: Dmytro Linkin <dlinkin@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Diffstat (limited to 'include/linux/mlx5')
| -rw-r--r-- | include/linux/mlx5/driver.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h index 020a8f7fdbdd..f8902bcd91e2 100644 --- a/include/linux/mlx5/driver.h +++ b/include/linux/mlx5/driver.h @@ -542,6 +542,10 @@ struct mlx5_core_roce { enum { MLX5_PRIV_FLAGS_DISABLE_IB_ADEV = 1 << 0, MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV = 1 << 1, + /* Set during device detach to block any further devices + * creation/deletion on drivers rescan. Unset during device attach. + */ + MLX5_PRIV_FLAGS_DETACH = 1 << 2, }; struct mlx5_adev { |