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vdpa/mlx5: Add error code for suspend/resume VQ

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Instead of blindly calling suspend/resume_vqs(), make then return error
codes.

To keep compatibility, keep suspending or resuming VQs on error and
return the last error code. The assumption here is that the error code
would be the same.

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-v2-17-560c491078df@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Dragos Tatulea
2024-06-26 13:26:53 +03:00
committed by Michael S. Tsirkin
parent fc9af25d04
commit b89bb349f2
1 changed files with 55 additions and 24 deletions
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drivers/vdpa/mlx5/net/mlx5_vnet.c
+55 -24
View File
@@ -1526,71 +1526,102 @@ err_fwqp:
return err;
}
static void suspend_vq(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq)
static int suspend_vq(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq)
{
struct mlx5_virtq_attr attr;
int err;
if (!mvq->initialized)
return;
return 0;
if (mvq->fw_state != MLX5_VIRTIO_NET_Q_OBJECT_STATE_RDY)
return;
return 0;
if (modify_virtqueue_state(ndev, mvq, MLX5_VIRTIO_NET_Q_OBJECT_STATE_SUSPEND))
mlx5_vdpa_warn(&ndev->mvdev, "modify to suspend failed\n");
if (query_virtqueue(ndev, mvq, &attr)) {
mlx5_vdpa_warn(&ndev->mvdev, "failed to query virtqueue\n");
return;
err = modify_virtqueue_state(ndev, mvq, MLX5_VIRTIO_NET_Q_OBJECT_STATE_SUSPEND);
if (err) {
mlx5_vdpa_warn(&ndev->mvdev, "modify to suspend failed, err: %d\n", err);
return err;
}
err = query_virtqueue(ndev, mvq, &attr);
if (err) {
mlx5_vdpa_warn(&ndev->mvdev, "failed to query virtqueue, err: %d\n", err);
return err;
}
mvq->avail_idx = attr.available_index;
mvq->used_idx = attr.used_index;
return 0;
}
static void suspend_vqs(struct mlx5_vdpa_net *ndev)
static int suspend_vqs(struct mlx5_vdpa_net *ndev)
{
int err = 0;
int i;
for (i = 0; i < ndev->cur_num_vqs; i++)
suspend_vq(ndev, &ndev->vqs[i]);
for (i = 0; i < ndev->cur_num_vqs; i++) {
int local_err = suspend_vq(ndev, &ndev->vqs[i]);
err = local_err ? local_err : err;
}
return err;
}
static void resume_vq(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq)
static int resume_vq(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq)
{
int err;
if (!mvq->initialized)
return;
return 0;
switch (mvq->fw_state) {
case MLX5_VIRTIO_NET_Q_OBJECT_STATE_INIT:
/* Due to a FW quirk we need to modify the VQ fields first then change state.
* This should be fixed soon. After that, a single command can be used.
*/
if (modify_virtqueue(ndev, mvq, 0))
err = modify_virtqueue(ndev, mvq, 0);
if (err) {
mlx5_vdpa_warn(&ndev->mvdev,
"modify vq properties failed for vq %u\n", mvq->index);
"modify vq properties failed for vq %u, err: %d\n",
mvq->index, err);
return err;
}
break;
case MLX5_VIRTIO_NET_Q_OBJECT_STATE_SUSPEND:
if (!is_resumable(ndev)) {
mlx5_vdpa_warn(&ndev->mvdev, "vq %d is not resumable\n", mvq->index);
return;
return -EINVAL;
}
break;
case MLX5_VIRTIO_NET_Q_OBJECT_STATE_RDY:
return;
return 0;
default:
mlx5_vdpa_warn(&ndev->mvdev, "resume vq %u called from bad state %d\n",
mvq->index, mvq->fw_state);
return;
return -EINVAL;
}
if (modify_virtqueue_state(ndev, mvq, MLX5_VIRTIO_NET_Q_OBJECT_STATE_RDY))
mlx5_vdpa_warn(&ndev->mvdev, "modify to resume failed for vq %u\n", mvq->index);
err = modify_virtqueue_state(ndev, mvq, MLX5_VIRTIO_NET_Q_OBJECT_STATE_RDY);
if (err)
mlx5_vdpa_warn(&ndev->mvdev, "modify to resume failed for vq %u, err: %d\n",
mvq->index, err);
return err;
}
static void resume_vqs(struct mlx5_vdpa_net *ndev)
static int resume_vqs(struct mlx5_vdpa_net *ndev)
{
for (int i = 0; i < ndev->cur_num_vqs; i++)
resume_vq(ndev, &ndev->vqs[i]);
int err = 0;
for (int i = 0; i < ndev->cur_num_vqs; i++) {
int local_err = resume_vq(ndev, &ndev->vqs[i]);
err = local_err ? local_err : err;
}
return err;
}
static void teardown_vq(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq)