Re: [PATCH 1/1] Userspace I/O (UIO): Add support for userspace DMA

[Leon Woestenberg]

Hello Edward,

On Wed, Dec 3, 2008 at 10:39 PM,  <edward_estabrook@xxxxxxxxxxx> wrote:
> From: Edward Estabrook <Edward_Estabrook@xxxxxxxxxxx>
>
> Here is a patch that adds the ability to dynamically allocate (and use) coherent DMA from userspace by extending the userspace IO driver.  This patch applies against 2.6.28-rc6.
>
You are using a magic value to mmap(), just to keep options open:

Would this in the future allow us to also add support for streaming
non-coherent DMA directly into user space buffers?

Regards,
---
Leon
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