linux-kernel - Re: [PATCH 5/8] xen/gntdev: Add initial support for dma-buf UAPI

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Message-ID: <25a0adae-6488-1d24-0c0a-514b24dcb1df@gmail.com>
Date:   Wed, 30 May 2018 09:52:55 +0300
From:   Oleksandr Andrushchenko <andr2000@...il.com>
To:     Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linux-media@...r.kernel.org,
        jgross@...e.com, konrad.wilk@...cle.com
Cc:     daniel.vetter@...el.com, dongwon.kim@...el.com,
        matthew.d.roper@...el.com,
        Oleksandr Andrushchenko <oleksandr_andrushchenko@...m.com>
Subject: Re: [PATCH 5/8] xen/gntdev: Add initial support for dma-buf UAPI

On 05/30/2018 01:34 AM, Boris Ostrovsky wrote:
> On 05/25/2018 11:33 AM, Oleksandr Andrushchenko wrote:
>
>>   
>> +/*
>> + * Create a dma-buf [1] from grant references @refs of count @count provided
>> + * by the foreign domain @domid with flags @flags.
>> + *
>> + * By default dma-buf is backed by system memory pages, but by providing
>> + * one of the GNTDEV_DMA_FLAG_XXX flags it can also be created as
>> + * a DMA write-combine or coherent buffer, e.g. allocated with dma_alloc_wc/
>> + * dma_alloc_coherent.
>> + *
>> + * Returns 0 if dma-buf was successfully created and the corresponding
>> + * dma-buf's file descriptor is returned in @fd.
>> + *
>> + * [1] https://elixir.bootlin.com/linux/latest/source/Documentation/driver-api/dma-buf.rst
>
> Documentation/driver-api/dma-buf.rst.
>
Indeed ;)
> -boris
Thank you,
Oleksandr