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a06bd11b18
Deleting the old mr during mr update (.set_map) and then modifying the vqs with the new mr is not a good flow for firmware. The firmware expects that mkeys are deleted after there are no more vqs referencing them. Introduce reference counting for mrs to fix this. It is the only way to make sure that mkeys are not in use by vqs. An mr reference is taken when the mr is associated to the mr asid table and when the mr is linked to the vq on create/modify. The reference is released when the mkey is unlinked from the vq (trough modify/destroy) and from the mr asid table. To make things consistent, get rid of mlx5_vdpa_destroy_mr and use get/put semantics everywhere. Reviewed-by: Gal Pressman <gal@nvidia.com> Acked-by: Eugenio Pérez <eperezma@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com> Message-Id: <20231225151203.152687-8-dtatulea@nvidia.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> |
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