linux-kernel - Re: [PATCH] Documentation/dma-buf-sharing.txt: update API descriptions

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Message-ID: <CAO_48GGHRiYAL-pU0R6pZ8V=8BN6FqObsT25TnsZLTtt7AvxKA@mail.gmail.com>
Date:	Wed, 21 May 2014 09:13:21 +0530
From:	Sumit Semwal <sumit.semwal@...aro.org>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	Gioh Kim <gioh.kim@....com>, Randy Dunlap <rdunlap@...radead.org>,
	linux-media@...r.kernel.org,
	DRI mailing list <dri-devel@...ts.freedesktop.org>,
	linux-doc@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	이건호 <gunho.lee@....com>
Subject: Re: [PATCH] Documentation/dma-buf-sharing.txt: update API descriptions

Hi Bjorn,

On 21 May 2014 04:50, Bjorn Helgaas <bhelgaas@...gle.com> wrote:
> On Wed, May 14, 2014 at 08:49:43AM +0900, Gioh Kim wrote:
>> Update some descriptions for API arguments and descriptions.
>>
>> Signed-off-by: Gioh Kim <gioh.kim@....com>
>
> I applied this to my "dma-api" branch for v3.16, thanks!
As always, I would queue this up for my dma-buf pull request, along
with other dma-buf changes.

Thanks and best regards,
~Sumit.
>
>> ---
>>  Documentation/dma-buf-sharing.txt |   14 ++++++++------
>>  1 file changed, 8 insertions(+), 6 deletions(-)
>>
>> diff --git a/Documentation/dma-buf-sharing.txt b/Documentation/dma-buf-sharing.txt
>> index 505e711..aadd901 100644
>> --- a/Documentation/dma-buf-sharing.txt
>> +++ b/Documentation/dma-buf-sharing.txt
>> @@ -56,10 +56,10 @@ The dma_buf buffer sharing API usage contains the following steps:
>>                                    size_t size, int flags,
>>                                    const char *exp_name)
>>
>> -   If this succeeds, dma_buf_export allocates a dma_buf structure, and returns a
>> -   pointer to the same. It also associates an anonymous file with this buffer,
>> -   so it can be exported. On failure to allocate the dma_buf object, it returns
>> -   NULL.
>> +   If this succeeds, dma_buf_export_named allocates a dma_buf structure, and
>> +   returns a pointer to the same. It also associates an anonymous file with this
>> +   buffer, so it can be exported. On failure to allocate the dma_buf object,
>> +   it returns NULL.
>>
>>     'exp_name' is the name of exporter - to facilitate information while
>>     debugging.
>> @@ -76,7 +76,7 @@ The dma_buf buffer sharing API usage contains the following steps:
>>     drivers and/or processes.
>>
>>     Interface:
>> -      int dma_buf_fd(struct dma_buf *dmabuf)
>> +      int dma_buf_fd(struct dma_buf *dmabuf, int flags)
>>
>>     This API installs an fd for the anonymous file associated with this buffer;
>>     returns either 'fd', or error.
>> @@ -157,7 +157,9 @@ to request use of buffer for allocation.
>>     "dma_buf->ops->" indirection from the users of this interface.
>>
>>     In struct dma_buf_ops, unmap_dma_buf is defined as
>> -      void (*unmap_dma_buf)(struct dma_buf_attachment *, struct sg_table *);
>> +      void (*unmap_dma_buf)(struct dma_buf_attachment *,
>> +                            struct sg_table *,
>> +                            enum dma_data_direction);
>>
>>     unmap_dma_buf signifies the end-of-DMA for the attachment provided. Like
>>     map_dma_buf, this API also must be implemented by the exporter.
>> --
>> 1.7.9.5
>>
>> --
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-- 
Thanks and regards,

Sumit Semwal
Graphics Engineer - Graphics working group
Linaro.org │ Open source software for ARM SoCs
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