diff options
| author | Zhu Lingshan | 2024-02-03 00:38:57 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin | 2024-03-19 02:45:50 -0400 |
| commit | 0a926fc972532788719fd03c4a44724ec23c1875 (patch) | |
| tree | 32806022811e5268671aba991e87a92e532a32b7 | |
| parent | 1496c47065f9f8413296780c63374daee9bdae20 (diff) | |
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: Zhu Lingshan <lingshan.zhu@intel.com>
Message-Id: <20240202163905.8834-3-lingshan.zhu@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | drivers/vhost/vdpa.c | 8 | ||||
| -rw-r--r-- | include/linux/vdpa.h | 5 |
2 files changed, 13 insertions, 0 deletions
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index aef92a7c57f3..ba52d128aeb7 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -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) diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index db15ac07f8a6..4097e8e92860 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -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); |