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vdpa/mlx5: Add support for modifying the virtio_version VQ field

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This is done in preparation for the pre-creation of hardware virtqueues
at device add time.

Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Message-Id: <20240626-stage-vdpa-vq-precreate-v2-10-560c491078df@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Dragos Tatulea 2024-06-26 13:26:46 +03:00 committed by Michael S. Tsirkin
parent 4a19f2942a
commit f70080c5bc
2 changed files with 17 additions and 0 deletions
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16
drivers/vdpa/mlx5/net/mlx5_vnet.c
View file

@ -1283,6 +1283,10 @@ static int modify_virtqueue(struct mlx5_vdpa_net *ndev,
if (mvq->modified_fields & MLX5_VIRTQ_MODIFY_MASK_VIRTIO_Q_USED_IDX)
MLX5_SET(virtio_net_q_object, obj_context, hw_used_index, mvq->used_idx);
if (mvq->modified_fields & MLX5_VIRTQ_MODIFY_MASK_QUEUE_VIRTIO_VERSION)
MLX5_SET(virtio_q, vq_ctx, virtio_version_1_0,
!!(ndev->mvdev.actual_features & BIT_ULL(VIRTIO_F_VERSION_1)));
if (mvq->modified_fields & MLX5_VIRTQ_MODIFY_MASK_VIRTIO_Q_MKEY) {
vq_mr = mvdev->mr[mvdev->group2asid[MLX5_VDPA_DATAVQ_GROUP]];
@ -2709,6 +2713,7 @@ static int mlx5_vdpa_set_driver_features(struct vdpa_device *vdev, u64 features)
{
struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
u64 old_features = mvdev->actual_features;
int err;
print_features(mvdev, features, true);
@ -2723,6 +2728,17 @@ static int mlx5_vdpa_set_driver_features(struct vdpa_device *vdev, u64 features)
else
ndev->rqt_size = 1;
/* Interested in changes of vq features only. */
if (get_features(old_features) != get_features(mvdev->actual_features)) {
for (int i = 0; i < mvdev->max_vqs; ++i) {
struct mlx5_vdpa_virtqueue *mvq = &ndev->vqs[i];
mvq->modified_fields |= (
MLX5_VIRTQ_MODIFY_MASK_QUEUE_VIRTIO_VERSION
);
}
}
update_cvq_info(mvdev);
return err;
}

1
include/linux/mlx5/mlx5_ifc_vdpa.h
View file

@ -148,6 +148,7 @@ enum {
MLX5_VIRTQ_MODIFY_MASK_VIRTIO_Q_ADDRS = (u64)1 << 6,
MLX5_VIRTQ_MODIFY_MASK_VIRTIO_Q_AVAIL_IDX = (u64)1 << 7,
MLX5_VIRTQ_MODIFY_MASK_VIRTIO_Q_USED_IDX = (u64)1 << 8,
MLX5_VIRTQ_MODIFY_MASK_QUEUE_VIRTIO_VERSION = (u64)1 << 10,
MLX5_VIRTQ_MODIFY_MASK_VIRTIO_Q_MKEY = (u64)1 << 11,
MLX5_VIRTQ_MODIFY_MASK_DESC_GROUP_MKEY = (u64)1 << 14,
};