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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>
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@ -33,10 +33,29 @@ static void vfio_fsl_mc_release(void *device_data)
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static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd,
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unsigned long arg)
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{
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unsigned long minsz;
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struct vfio_fsl_mc_device *vdev = device_data;
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struct fsl_mc_device *mc_dev = vdev->mc_dev;
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switch (cmd) {
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case VFIO_DEVICE_GET_INFO:
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{
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return -ENOTTY;
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struct vfio_device_info info;
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minsz = offsetofend(struct vfio_device_info, num_irqs);
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if (copy_from_user(&info, (void __user *)arg, minsz))
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return -EFAULT;
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if (info.argsz < minsz)
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return -EINVAL;
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info.flags = VFIO_DEVICE_FLAGS_FSL_MC;
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info.num_regions = mc_dev->obj_desc.region_count;
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info.num_irqs = mc_dev->obj_desc.irq_count;
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return copy_to_user((void __user *)arg, &info, minsz) ?
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-EFAULT : 0;
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}
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case VFIO_DEVICE_GET_REGION_INFO:
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{
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