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

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

[Gioh Kim]

Update some descriptions for API arguments and descriptions.

Signed-off-by: Gioh Kim <gioh.kim@lge.com>
---
 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

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

[Bjorn Helgaas]

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@lge.com>

I applied this to my "dma-api" branch for v3.16, thanks!

> ---
>  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
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/

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

[Sumit Semwal]

Hi Bjorn,

On 21 May 2014 04:50, Bjorn Helgaas <bhelgaas@google.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@lge.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
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>> Please read the FAQ at  http://www.tux.org/lkml/



-- 
Thanks and regards,

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

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

[Bjorn Helgaas]

On Tue, May 20, 2014 at 9:43 PM, Sumit Semwal <sumit.semwal@linaro.org> wrote:
> Hi Bjorn,
>
> On 21 May 2014 04:50, Bjorn Helgaas <bhelgaas@google.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@lge.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.

OK, I dropped this one.

>>> ---
>>>  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
>>>
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>> Please read the FAQ at  http://www.tux.org/lkml/
>
>
>
> --
> Thanks and regards,
>
> Sumit Semwal
> Graphics Engineer - Graphics working group
> Linaro.org │ Open source software for ARM SoCs

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

[gioh.kim]

From: "gioh.kim" <gioh.kim@lge.com>

update some descriptions for API arguments and descriptions.

Signed-off-by: Gioh Kim <gioh.kim@lge.com>
---
 Documentation/dma-buf-sharing.txt |   10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/Documentation/dma-buf-sharing.txt b/Documentation/dma-buf-sharing.txt
index 505e711..1ea89b8 100644
--- a/Documentation/dma-buf-sharing.txt
+++ b/Documentation/dma-buf-sharing.txt
@@ -56,7 +56,7 @@ 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
+   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.
@@ -66,7 +66,7 @@ The dma_buf buffer sharing API usage contains the following steps:
 
    Exporting modules which do not wish to provide any specific name may use the
    helper define 'dma_buf_export()', with the same arguments as above, but
-   without the last argument; a __FILE__ pre-processor directive will be
+   without the last argument; a KBUILD_MODNAME pre-processor directive will be
    inserted in place of 'exp_name' instead.
 
 2. Userspace gets a handle to pass around to potential buffer-users
@@ -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

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

[Thierry Reding]

[-- Attachment #1: Type: text/plain, Size: 1988 bytes --]

On Mon, May 12, 2014 at 08:48:12PM +0900, gioh.kim wrote:
> From: "gioh.kim" <gioh.kim@lge.com>

It might be good to fix your setup to make this be the same as the name
and email used in the Signed-off-by line below.

> update some descriptions for API arguments and descriptions.

Nit: "Update" since it's the beginning of a sentence.

> Signed-off-by: Gioh Kim <gioh.kim@lge.com>
> ---
>  Documentation/dma-buf-sharing.txt |   10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/Documentation/dma-buf-sharing.txt b/Documentation/dma-buf-sharing.txt
> index 505e711..1ea89b8 100644
> --- a/Documentation/dma-buf-sharing.txt
> +++ b/Documentation/dma-buf-sharing.txt
> @@ -56,7 +56,7 @@ 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
> +   If this succeeds, dma_buf_export_named allocates a dma_buf structure, and returns a

Perhaps reformat this so that the lines don't exceed 80 characters?

>     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.
> @@ -66,7 +66,7 @@ The dma_buf buffer sharing API usage contains the following steps:
>  
>     Exporting modules which do not wish to provide any specific name may use the
>     helper define 'dma_buf_export()', with the same arguments as above, but
> -   without the last argument; a __FILE__ pre-processor directive will be
> +   without the last argument; a KBUILD_MODNAME pre-processor directive will be
>     inserted in place of 'exp_name' instead.

This was already fixed in commit 2e33def0339c (dma-buf: update exp_name
when using dma_buf_export()). Perhaps you should rebase this patch on
top of the latest linux-next.

Otherwise looks good.

Thierry

[-- Attachment #2: Type: application/pgp-signature, Size: 836 bytes --]

RE: [PATCH] Documentation/dma-buf-sharing.txt: update API descriptions

[Gioh Kim]

Thank you for advice.
I will send a fixed patch soon.

> -----Original Message-----
> From: Thierry Reding [mailto:thierry.reding@gmail.com]
> Sent: Tuesday, May 13, 2014 5:45 PM
> To: gioh.kim
> Cc: Sumit Semwal; Randy Dunlap; linux-media@vger.kernel.org; dri-devel@lists.freedesktop.org; linux-
> doc@vger.kernel.org; linux-kernel@vger.kernel.org; gunho.lee@lge.com
> Subject: Re: [PATCH] Documentation/dma-buf-sharing.txt: update API descriptions
> 
> On Mon, May 12, 2014 at 08:48:12PM +0900, gioh.kim wrote:
> > From: "gioh.kim" <gioh.kim@lge.com>
> 
> It might be good to fix your setup to make this be the same as the name
> and email used in the Signed-off-by line below.
> 
> > update some descriptions for API arguments and descriptions.
> 
> Nit: "Update" since it's the beginning of a sentence.
> 
> > Signed-off-by: Gioh Kim <gioh.kim@lge.com>
> > ---
> >  Documentation/dma-buf-sharing.txt |   10 ++++++----
> >  1 file changed, 6 insertions(+), 4 deletions(-)
> >
> > diff --git a/Documentation/dma-buf-sharing.txt b/Documentation/dma-buf-sharing.txt
> > index 505e711..1ea89b8 100644
> > --- a/Documentation/dma-buf-sharing.txt
> > +++ b/Documentation/dma-buf-sharing.txt
> > @@ -56,7 +56,7 @@ 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
> > +   If this succeeds, dma_buf_export_named allocates a dma_buf structure, and returns a
> 
> Perhaps reformat this so that the lines don't exceed 80 characters?
> 
> >     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.
> > @@ -66,7 +66,7 @@ The dma_buf buffer sharing API usage contains the following steps:
> >
> >     Exporting modules which do not wish to provide any specific name may use the
> >     helper define 'dma_buf_export()', with the same arguments as above, but
> > -   without the last argument; a __FILE__ pre-processor directive will be
> > +   without the last argument; a KBUILD_MODNAME pre-processor directive will be
> >     inserted in place of 'exp_name' instead.
> 
> This was already fixed in commit 2e33def0339c (dma-buf: update exp_name
> when using dma_buf_export()). Perhaps you should rebase this patch on
> top of the latest linux-next.
> 
> Otherwise looks good.
> 
> Thierry