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vfio/ccw: Provide a get_region_info op 

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

Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Link: https://lore.kernel.org/r/12-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 13:41:28 -04:00 committed by Alex Williamson
parent b9827eff6b
commit 61b3f7b5a7
1 changed files with 26 additions and 18 deletions
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44
drivers/s390/cio/vfio_ccw_ops.c
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@ -504,6 +504,31 @@ void vfio_ccw_unregister_dev_regions(struct vfio_ccw_private *private)
private->region = NULL;
}
static int
vfio_ccw_mdev_ioctl_get_region_info(struct vfio_device *vdev,
struct vfio_region_info __user *arg)
{
struct vfio_ccw_private *private =
container_of(vdev, struct vfio_ccw_private, vdev);
struct vfio_region_info info;
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 = vfio_ccw_mdev_get_region_info(private, &info, arg);
if (ret)
return ret;
return copy_to_user(arg, &info, minsz) ? -EFAULT : 0;
}
static ssize_t vfio_ccw_mdev_ioctl(struct vfio_device *vdev,
unsigned int cmd,
unsigned long arg)
@ -532,24 +557,6 @@ static ssize_t vfio_ccw_mdev_ioctl(struct vfio_device *vdev,
return copy_to_user((void __user *)arg, &info, minsz) ? -EFAULT : 0;
}
case VFIO_DEVICE_GET_REGION_INFO:
{
struct vfio_region_info info;
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 = vfio_ccw_mdev_get_region_info(private, &info, arg);
if (ret)
return ret;
return copy_to_user((void __user *)arg, &info, minsz) ? -EFAULT : 0;
}
case VFIO_DEVICE_GET_IRQ_INFO:
{
struct vfio_irq_info info;
@ -627,6 +634,7 @@ static const struct vfio_device_ops vfio_ccw_dev_ops = {
.read = vfio_ccw_mdev_read,
.write = vfio_ccw_mdev_write,
.ioctl = vfio_ccw_mdev_ioctl,
.get_region_info = vfio_ccw_mdev_ioctl_get_region_info,
.request = vfio_ccw_mdev_request,
.dma_unmap = vfio_ccw_dma_unmap,
.bind_iommufd = vfio_iommufd_emulated_bind,