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| author | Diana Craciun <diana.craciun@oss.nxp.com> | 2020-10-05 20:36:47 +0300 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2020-10-12 20:32:19 +0300 |
| commit | f97f4c04e5d6ca8b90b5b412bd7e72de79426263 (patch) | |
| tree | 748e6ba9a6705d8d8dd06b36d02a3073ee572789 /drivers/vfio/fsl-mc | |
| parent | 704f5082d8457a2166eb4cb4e460510117c70928 (diff) | |
| download | linux-f97f4c04e5d6ca8b90b5b412bd7e72de79426263.tar.xz | |
vfio/fsl-mc: Implement VFIO_DEVICE_GET_INFO ioctl
Allow userspace to get fsl-mc device info (number of regions
and irqs).
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
Signed-off-by: Diana Craciun <diana.craciun@oss.nxp.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio/fsl-mc')
| -rw-r--r-- | drivers/vfio/fsl-mc/vfio_fsl_mc.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc.c b/drivers/vfio/fsl-mc/vfio_fsl_mc.c index 594760203268..161c2cbe07dc 100644 --- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c +++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c @@ -33,10 +33,29 @@ static void vfio_fsl_mc_release(void *device_data) static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd, unsigned long arg) { + unsigned long minsz; + struct vfio_fsl_mc_device *vdev = device_data; + struct fsl_mc_device *mc_dev = vdev->mc_dev; + switch (cmd) { case VFIO_DEVICE_GET_INFO: { - return -ENOTTY; + struct vfio_device_info info; + + minsz = offsetofend(struct vfio_device_info, num_irqs); + + if (copy_from_user(&info, (void __user *)arg, minsz)) + return -EFAULT; + + if (info.argsz < minsz) + return -EINVAL; + + info.flags = VFIO_DEVICE_FLAGS_FSL_MC; + info.num_regions = mc_dev->obj_desc.region_count; + info.num_irqs = mc_dev->obj_desc.irq_count; + + return copy_to_user((void __user *)arg, &info, minsz) ? + -EFAULT : 0; } case VFIO_DEVICE_GET_REGION_INFO: { |