Commit da802961 authored by Xuan Zhuo's avatar Xuan Zhuo Committed by Michael S. Tsirkin
Browse files

virtio: record the maximum queue num supported by the device. 



virtio-net can display the maximum (supported by hardware) ring size in
ethtool -g eth0.

When the subsequent patch implements vring reset, it can judge whether
the ring size passed by the driver is legal based on this.

Signed-off-by: default avatarXuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: default avatarJason Wang <jasowang@redhat.com>
Message-Id: <20220801063902.129329-2-xuanzhuo@linux.alibaba.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 0b6fd46e

arch/um/drivers/virtio_uml.c

+1 −0
Original line number Diff line number Diff line
@@ -958,6 +958,7 @@ static struct virtqueue *vu_setup_vq(struct virtio_device *vdev, 
		goto error_create;

	}

	vq->priv = info;

	vq->num_max = num;

	num = virtqueue_get_vring_size(vq);



	if (vu_dev->protocol_features &

drivers/platform/mellanox/mlxbf-tmfifo.c

+2 −0
Original line number Diff line number Diff line
@@ -959,6 +959,8 @@ static int mlxbf_tmfifo_virtio_find_vqs(struct virtio_device *vdev, 
			goto error;

		}



		vq->num_max = vring->num;



		vqs[i] = vq;

		vring->vq = vq;

		vq->priv = vring;

drivers/remoteproc/remoteproc_virtio.c

+2 −0
Original line number Diff line number Diff line
@@ -125,6 +125,8 @@ static struct virtqueue *rp_find_vq(struct virtio_device *vdev, 
		return ERR_PTR(-ENOMEM);

	}



	vq->num_max = num;



	rvring->vq = vq;

	vq->priv = rvring;

drivers/s390/virtio/virtio_ccw.c

+3 −0
Original line number Diff line number Diff line
@@ -530,6 +530,9 @@ static struct virtqueue *virtio_ccw_setup_vq(struct virtio_device *vdev, 
		err = -ENOMEM;

		goto out_err;

	}



	vq->num_max = info->num;



	/* it may have been reduced */

	info->num = virtqueue_get_vring_size(vq);

drivers/virtio/virtio_mmio.c

+2 −0
Original line number Diff line number Diff line
@@ -403,6 +403,8 @@ static struct virtqueue *vm_setup_vq(struct virtio_device *vdev, unsigned int in 
		goto error_new_virtqueue;

	}



	vq->num_max = num;



	/* Activate the queue */

	writel(virtqueue_get_vring_size(vq), vm_dev->base + VIRTIO_MMIO_QUEUE_NUM);

	if (vm_dev->version == 1) {