Commit 9dba4195 authored by Dragos Tatulea's avatar Dragos Tatulea Committed by Michael S. Tsirkin
Browse files

vdpa/mlx5: Parallelize VQ suspend/resume for CVQ MQ command 



change_num_qps() is still suspending/resuming VQs one by one.
This change switches to parallel suspend/resume.

When increasing the number of queues the flow has changed a bit for
simplicity: the setup_vq() function will always be called before
resume_vqs(). If the VQ is initialized, setup_vq() will exit early. If
the VQ is not initialized, setup_vq() will create it and resume_vqs()
will resume it.

Signed-off-by: default avatarDragos Tatulea <dtatulea@nvidia.com>
Reviewed-by: default avatarTariq Toukan <tariqt@nvidia.com>
Message-Id: <20240816090159.1967650-11-dtatulea@nvidia.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Acked-by: default avatarEugenio Pérez <eperezma@redhat.com>
Tested-by: default avatarLei Yang <leiyang@redhat.com>
parent 74c89072

drivers/vdpa/mlx5/net/mlx5_vnet.c

+12 −10
Original line number Diff line number Diff line
@@ -2229,25 +2229,27 @@ static int change_num_qps(struct mlx5_vdpa_dev *mvdev, int newqps) 
		if (err)

			return err;



		for (i = cur_vqs - 1; i >= new_vqs; i--) {

			struct mlx5_vdpa_virtqueue *mvq = &ndev->vqs[i];



			if (is_resumable(ndev))

				suspend_vq(ndev, mvq);

			else

				teardown_vq(ndev, mvq);

		if (is_resumable(ndev)) {

			suspend_vqs(ndev, new_vqs, cur_vqs - new_vqs);

		} else {

			for (i = new_vqs; i < cur_vqs; i++)

				teardown_vq(ndev, &ndev->vqs[i]);

		}



		ndev->cur_num_vqs = new_vqs;

	} else {

		ndev->cur_num_vqs = new_vqs;

		for (i = cur_vqs; i < new_vqs; i++) {

			struct mlx5_vdpa_virtqueue *mvq = &ndev->vqs[i];



			err = mvq->initialized ? resume_vq(ndev, mvq) : setup_vq(ndev, mvq, true);

		for (i = cur_vqs; i < new_vqs; i++) {

			err = setup_vq(ndev, &ndev->vqs[i], false);

			if (err)

				goto clean_added;

		}



		err = resume_vqs(ndev, cur_vqs, new_vqs - cur_vqs);

		if (err)

			goto clean_added;



		err = modify_rqt(ndev, new_vqs);

		if (err)

			goto clean_added;