RE: [PATCH v4 4/17] iommufd: Document overview of iommufd

Tian, Kevin
2022-11-11T05:59:52Z

> From: Jason Gunthorpe <jgg@nvidia.com>
> Sent: Wednesday, November 9, 2022 1:10 AM
>
> +/**
> + * iommufd_device_unbind - Undo iommufd_device_bind()
> + * @idev: Device returned by iommufd_device_bind()
> + *
> + * Release the device from iommufd control. The DMA ownership will
> return back
> + * to unowned with blocked DMA. This invalidates the iommufd_device

unowned but not blocked DMA. iommu_device_release_dma_owner()
will decide what will be the state then, e.g. attached back to the default
domain in most cases.

> +/**
> + * iommufd_device_detach - Disconnect a device to an iommu_domain
> + * @idev: device to detach
> + *
> + * Undoes iommufd_device_attach(). This disconnects the idev from the