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vfio/platform: Provide a get_region_info op

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Move it out of vfio_platform_ioctl() and re-indent it. Add it to all
platform drivers.

Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Pranjal Shrivastava <praan@google.com>
Reviewed-by: Mostafa Saleh <smostafa@google.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/9-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 13:41:25 -04:00
committed by Alex Williamson
parent 8339fccda8
commit d4635df279
4 changed files with 32 additions and 22 deletions
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1
drivers/vfio/platform/vfio_amba.c
View File

@@ -115,6 +115,7 @@ static const struct vfio_device_ops vfio_amba_ops = {
.open_device = vfio_platform_open_device,
.close_device = vfio_platform_close_device,
.ioctl = vfio_platform_ioctl,
.get_region_info = vfio_platform_ioctl_get_region_info,
.read = vfio_platform_read,
.write = vfio_platform_write,
.mmap = vfio_platform_mmap,

1
drivers/vfio/platform/vfio_platform.c
View File

@@ -101,6 +101,7 @@ static const struct vfio_device_ops vfio_platform_ops = {
.open_device = vfio_platform_open_device,
.close_device = vfio_platform_close_device,
.ioctl = vfio_platform_ioctl,
.get_region_info = vfio_platform_ioctl_get_region_info,
.read = vfio_platform_read,
.write = vfio_platform_write,
.mmap = vfio_platform_mmap,

50
drivers/vfio/platform/vfio_platform_common.c
View File

@@ -272,6 +272,34 @@ int vfio_platform_open_device(struct vfio_device *core_vdev)
}
EXPORT_SYMBOL_GPL(vfio_platform_open_device);
int vfio_platform_ioctl_get_region_info(struct vfio_device *core_vdev,
struct vfio_region_info __user *arg)
{
struct vfio_platform_device *vdev =
container_of(core_vdev, struct vfio_platform_device, vdev);
struct vfio_region_info info;
unsigned long minsz;
minsz = offsetofend(struct vfio_region_info, offset);
if (copy_from_user(&info, arg, minsz))
return -EFAULT;
if (info.argsz < minsz)
return -EINVAL;
if (info.index >= vdev->num_regions)
return -EINVAL;
/* map offset to the physical address */
info.offset = VFIO_PLATFORM_INDEX_TO_OFFSET(info.index);
info.size = vdev->regions[info.index].size;
info.flags = vdev->regions[info.index].flags;
return copy_to_user(arg, &info, minsz) ? -EFAULT : 0;
}
EXPORT_SYMBOL_GPL(vfio_platform_ioctl_get_region_info);
long vfio_platform_ioctl(struct vfio_device *core_vdev,
unsigned int cmd, unsigned long arg)
{
@@ -300,28 +328,6 @@ long vfio_platform_ioctl(struct vfio_device *core_vdev,
return copy_to_user((void __user *)arg, &info, minsz) ?
-EFAULT : 0;
} else if (cmd == 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;
if (info.index >= vdev->num_regions)
return -EINVAL;
/* map offset to the physical address */
info.offset = VFIO_PLATFORM_INDEX_TO_OFFSET(info.index);
info.size = vdev->regions[info.index].size;
info.flags = vdev->regions[info.index].flags;
return copy_to_user((void __user *)arg, &info, minsz) ?
-EFAULT : 0;
} else if (cmd == VFIO_DEVICE_GET_IRQ_INFO) {
struct vfio_irq_info info;

2
drivers/vfio/platform/vfio_platform_private.h
View File

@@ -85,6 +85,8 @@ int vfio_platform_open_device(struct vfio_device *core_vdev);
void vfio_platform_close_device(struct vfio_device *core_vdev);
long vfio_platform_ioctl(struct vfio_device *core_vdev,
unsigned int cmd, unsigned long arg);
int vfio_platform_ioctl_get_region_info(struct vfio_device *core_vdev,
struct vfio_region_info __user *arg);
ssize_t vfio_platform_read(struct vfio_device *core_vdev,
char __user *buf, size_t count,
loff_t *ppos);