Re: UIO DMA to userspace question

[Avi Kivity]

 On 08/07/2010 09:38 PM, Leon Woestenberg wrote:
> Hello all,
>
> can I use the UIO framework for the following?
>
> The userspace portion of the driver allocates memory in user-space
> using malloc() - usually resulting in a scatter pages in physical
> memory.
> The UIO kernel portion of the driver maps those using pci_map_sg().
>
> Is this possible, or does the UIO framework assume memory for DMA is
> allocated in kernel space?

Look at the new VFIO driver, which can do DMA if you have an IOMMU.

--
error compiling committee.c: too many arguments to function

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