vdpa/mlx5: Introduce init/destroy for MR resources

There's currently not a lot of action happening during
the init/destroy of MR resources. But more will be added
in the upcoming patches.

As the mr mutex lock init/destroy has been moved to these
new functions, the lifetime has now shifted away from
mlx5_vdpa_alloc_resources() / mlx5_vdpa_free_resources()
into these new functions. However, the lifetime at the
outer scope remains the same:
mlx5_vdpa_dev_add() / mlx5_vdpa_dev_free()

Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Message-Id: <20240830105838.2666587-8-dtatulea@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/vdpa/mlx5/core/mr.c b/drivers/vdpa/mlx5/core/mr.c
index cac470125612..64683a39d3db 100644
--- a/drivers/vdpa/mlx5/core/mr.c
+++ b/drivers/vdpa/mlx5/core/mr.c
@@ -846,3 +846,20 @@ int mlx5_vdpa_reset_mr(struct mlx5_vdpa_dev *mvdev, unsigned int asid)
 
 	return 0;
 }
+
+int mlx5_vdpa_init_mr_resources(struct mlx5_vdpa_dev *mvdev)
+{
+	struct mlx5_vdpa_mr_resources *mres = &mvdev->mres;
+
+	INIT_LIST_HEAD(&mres->mr_list_head);
+	mutex_init(&mres->lock);
+
+	return 0;
+}
+
+void mlx5_vdpa_destroy_mr_resources(struct mlx5_vdpa_dev *mvdev)
+{
+	struct mlx5_vdpa_mr_resources *mres = &mvdev->mres;
+
+	mutex_destroy(&mres->lock);
+}