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vdpa/mlx5: Add support for modifying the VQ features 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-v2-11-560c491078df@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Dragos Tatulea 2024-06-26 13:26:47 +03:00 committed by Michael S. Tsirkin
parent f70080c5bc
commit cdc3c7eaae
2 changed files with 12 additions and 1 deletions
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12
drivers/vdpa/mlx5/net/mlx5_vnet.c
View file

@ -1287,6 +1287,15 @@ static int modify_virtqueue(struct mlx5_vdpa_net *ndev,
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_QUEUE_FEATURES) {
u16 mlx_features = get_features(ndev->mvdev.actual_features);
MLX5_SET(virtio_net_q_object, obj_context, queue_feature_bit_mask_12_3,
mlx_features >> 3);
MLX5_SET(virtio_net_q_object, obj_context, queue_feature_bit_mask_2_0,
mlx_features & 7);
}
if (mvq->modified_fields & MLX5_VIRTQ_MODIFY_MASK_VIRTIO_Q_MKEY) {
vq_mr = mvdev->mr[mvdev->group2asid[MLX5_VDPA_DATAVQ_GROUP]];
@ -2734,7 +2743,8 @@ static int mlx5_vdpa_set_driver_features(struct vdpa_device *vdev, u64 features)
struct mlx5_vdpa_virtqueue *mvq = &ndev->vqs[i];
mvq->modified_fields |= (
MLX5_VIRTQ_MODIFY_MASK_QUEUE_VIRTIO_VERSION
MLX5_VIRTQ_MODIFY_MASK_QUEUE_VIRTIO_VERSION |
MLX5_VIRTQ_MODIFY_MASK_QUEUE_FEATURES
);
}
}

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

@ -150,6 +150,7 @@ enum {
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_QUEUE_FEATURES = (u64)1 << 12,
MLX5_VIRTQ_MODIFY_MASK_DESC_GROUP_MKEY = (u64)1 << 14,
};