vdpa/mlx5: Re-create HW VQs under certain conditions

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There are a few conditions under which the hardware VQs need a full
teardown and setup:

- VQ size changed to something else than default value. Hardware VQ size
  modification is not supported.

- User turns off certain device features: mergeable buffers, checksum
  virtio 1.0 compliance. In these cases, the TIR and RQT need to be
  re-created.

Add a needs_teardown configuration variable and set it when detecting
the above scenarios. On next DRIVER_OK, the resources will be torn down
first.

Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Acked-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Message-Id: <20240626-stage-vdpa-vq-precreate-v2-22-560c491078df@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

...

This commit is contained in:

Dragos Tatulea 2024-06-26 13:26:58 +03:00 • committed by Michael S. Tsirkin

parent ffb1aae43e

commit 0fe963d6fc

2 changed files with 16 additions and 0 deletions

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15

drivers/vdpa/mlx5/net/mlx5_vnet.c

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1

drivers/vdpa/mlx5/net/mlx5_vnet.h

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