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vfio/mtty: Provide a get_region_info op 

Move it out of mtty_ioctl() and re-indent it.

Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Pranjal Shrivastava <praan@google.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/6-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com
Signed-off-by: Alex Williamson <alex@shazbot.org>
This commit is contained in:
Jason Gunthorpe 2025-11-07 13:41:22 -04:00 committed by Alex Williamson
parent f3fddb71dd
commit 0787755271
1 changed files with 29 additions and 24 deletions
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53
samples/vfio-mdev/mtty.c
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@ -1785,6 +1785,34 @@ static int mtty_get_device_info(struct vfio_device_info *dev_info)
return 0; return 0;
} }
static int mtty_ioctl_get_region_info(struct vfio_device *vdev,
struct vfio_region_info __user *arg)
{
struct mdev_state *mdev_state =
container_of(vdev, struct mdev_state, vdev);
struct vfio_region_info info;
void *cap_type = NULL;
u16 cap_type_id = 0;
unsigned long minsz;
int ret;
minsz = offsetofend(struct vfio_region_info, offset);
if (copy_from_user(&info, arg, minsz))
return -EFAULT;
if (info.argsz < minsz)
return -EINVAL;
ret = mtty_get_region_info(mdev_state, &info, &cap_type_id, &cap_type);
if (ret)
return ret;
if (copy_to_user(arg, &info, minsz))
return -EFAULT;
return 0;
}
static long mtty_ioctl(struct vfio_device *vdev, unsigned int cmd, static long mtty_ioctl(struct vfio_device *vdev, unsigned int cmd,
unsigned long arg) unsigned long arg)
{ {
@ -1817,30 +1845,6 @@ static long mtty_ioctl(struct vfio_device *vdev, unsigned int cmd,
return 0; return 0;
} }
case VFIO_DEVICE_GET_REGION_INFO:
{
struct vfio_region_info info;
u16 cap_type_id = 0;
void *cap_type = NULL;
minsz = offsetofend(struct vfio_region_info, offset);
if (copy_from_user(&info, (void __user *)arg, minsz))
return -EFAULT;
if (info.argsz < minsz)
return -EINVAL;
ret = mtty_get_region_info(mdev_state, &info, &cap_type_id,
&cap_type);
if (ret)
return ret;
if (copy_to_user((void __user *)arg, &info, minsz))
return -EFAULT;
return 0;
}
case VFIO_DEVICE_GET_IRQ_INFO: case VFIO_DEVICE_GET_IRQ_INFO:
{ {
@ -1949,6 +1953,7 @@ static const struct vfio_device_ops mtty_dev_ops = {
.read = mtty_read, .read = mtty_read,
.write = mtty_write, .write = mtty_write,
.ioctl = mtty_ioctl, .ioctl = mtty_ioctl,
.get_region_info = mtty_ioctl_get_region_info,
.bind_iommufd = vfio_iommufd_emulated_bind, .bind_iommufd = vfio_iommufd_emulated_bind,
.unbind_iommufd = vfio_iommufd_emulated_unbind, .unbind_iommufd = vfio_iommufd_emulated_unbind,
.attach_ioas = vfio_iommufd_emulated_attach_ioas, .attach_ioas = vfio_iommufd_emulated_attach_ioas,