[PATCH vhost v3 11/24] vdpa/mlx5: Add support for modifying the VQ features field
From: Dragos Tatulea <dtatulea@nvidia.com>
Date: 2024-07-08 12:02:07
Also in:
linux-rdma, lkml, virtualization
Subsystem:
mellanox mlx5 ib driver, mellanox mlx5 vdpa driver, mellanox mlx5 core vpi driver, the rest, virtio core · Maintainers:
Leon Romanovsky, Dragos Tatulea, Saeed Mahameed, Tariq Toukan, Mark Bloch, Linus Torvalds, "Michael S. Tsirkin", Jason Wang
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 <redacted> --- drivers/vdpa/mlx5/net/mlx5_vnet.c | 12 +++++++++++- include/linux/mlx5/mlx5_ifc_vdpa.h | 1 + 2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index b104849f8477..db86e541b788 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c@@ -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 ); } }
diff --git a/include/linux/mlx5/mlx5_ifc_vdpa.h b/include/linux/mlx5/mlx5_ifc_vdpa.h
index 34f27c01cec9..58dfa2ee7c83 100644
--- a/include/linux/mlx5/mlx5_ifc_vdpa.h
+++ b/include/linux/mlx5/mlx5_ifc_vdpa.h@@ -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, };
--
2.45.2