Commit 0a926fc9 authored by Zhu Lingshan's avatar Zhu Lingshan Committed by Michael S. Tsirkin
Browse files

vDPA: introduce get_vq_size to vdpa_config_ops 



This commit introduces a new interface get_vq_size to
vDPA config ops, this new interface intends to report
the size of a specific virtqueue

Signed-off-by: default avatarZhu Lingshan <lingshan.zhu@intel.com>
Message-Id: <20240202163905.8834-3-lingshan.zhu@intel.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 1496c470

drivers/vhost/vdpa.c

+8 −0
Original line number Diff line number Diff line
@@ -687,6 +687,14 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, 
		if (!ops->set_group_asid)

			return -EOPNOTSUPP;

		return ops->set_group_asid(vdpa, idx, s.num);

	case VHOST_VDPA_GET_VRING_SIZE:

		if (!ops->get_vq_size)

			return -EOPNOTSUPP;

		s.index = idx;

		s.num = ops->get_vq_size(vdpa, idx);

		if (copy_to_user(argp, &s, sizeof(s)))

			return -EFAULT;

		return 0;

	case VHOST_GET_VRING_BASE:

		r = ops->get_vq_state(v->vdpa, idx, &vq_state);

		if (r)

include/linux/vdpa.h

+5 −0
Original line number Diff line number Diff line
@@ -195,6 +195,10 @@ struct vdpa_map_file { 
 *				@idx: virtqueue index

 *				Returns int: irq number of a virtqueue,

 *				negative number if no irq assigned.

 * @get_vq_size:		Get the size of a specific virtqueue (optional)

 *				@vdev: vdpa device

 *				@idx: virtqueue index

 *				Return u16: the size of the virtqueue

 * @get_vq_align:		Get the virtqueue align requirement

 *				for the device

 *				@vdev: vdpa device
@@ -386,6 +390,7 @@ struct vdpa_config_ops { 
	(*get_vq_notification)(struct vdpa_device *vdev, u16 idx);

	/* vq irq is not expected to be changed once DRIVER_OK is set */

	int (*get_vq_irq)(struct vdpa_device *vdev, u16 idx);

	u16 (*get_vq_size)(struct vdpa_device *vdev, u16 idx);



	/* Device ops */

	u32 (*get_vq_align)(struct vdpa_device *vdev);