Re: [PATCH v3 01/43] drm/cma-helper: Rename symbols from drm_cma_gem_ to drm_gem_cma_

[Thomas Zimmermann <tzimmermann@suse.de>]

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Hi

Am 05.06.20 um 16:23 schrieb Sam Ravnborg:
> On Fri, Jun 05, 2020 at 04:15:46PM +0200, Thomas Zimmermann wrote:
>> Hi
>>
>> Am 05.06.20 um 10:40 schrieb Laurent Pinchart:
>>> Hi Thomas,
>>>
>>> Thank you for the patch.
>>>
>>> On Fri, Jun 05, 2020 at 09:32:05AM +0200, Thomas Zimmermann wrote:
>>>> This fixes the naming of several symbols within CMA helpers. No functional
>>>> changes are made.
>>>>
>>>> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
>>>
>>> Thank you for the patch.
>>>
>>> Speaking of naming, I wish we could rename drm_gem_cma_* to something
>>> else, as those helpers don't use CMA directly (and may not use it at
>>> all), but I think that would be too much intrusive changes for too
>>> little gain :-(
>>
>> I agree. Calling them GEM DMA helpers would be more precise. But I don't
>> really see an easy solution without either a big patch that touches
>> everything, or a lot of small patches with ugly intermediate states.
>>
>> IMHO the best option would probably be an additional header file
>> drm_gem_dma_helper.h that defines a dma name for each cma name. Drivers
>> could then be converted individually with a single per-driver patch.
> 
> From todo.rst:
> 
> "
> Rename CMA helpers to DMA helpers
> ---------------------------------
> 
> CMA (standing for contiguous memory allocator) is really a bit an accident of
> what these were used for first, a much better name would be DMA helpers. In the
> text these should even be called coherent DMA memory helpers (so maybe CDM, but
> no one knows what that means) since underneath they just use dma_alloc_coherent.
> 
> Contact: Laurent Pinchart, Daniel Vetter
> 
> Level: Intermediate (mostly because it is a huge tasks without good partial
> milestones, not technically itself that challenging)
> "
> 
> The same?

Yes, I've been thinking of this. That would be a good task for someone
to get familiar with the DRM code.

Best regards
Thomas

> 
> 	Sam
> 
>>
>> Best regards
>> Thomas
>>
>>>
>>>> ---
>>>>  drivers/gpu/drm/aspeed/aspeed_gfx_drv.c |  2 +-
>>>>  drivers/gpu/drm/drm_gem_cma_helper.c    | 10 +++++-----
>>>>  include/drm/drm_gem_cma_helper.h        |  4 ++--
>>>>  3 files changed, 8 insertions(+), 8 deletions(-)
>>>>
>>>> diff --git a/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c b/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c
>>>> index 6b27242b9ee3c..5e7ea0459d018 100644
>>>> --- a/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c
>>>> +++ b/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c
>>>> @@ -188,7 +188,7 @@ DEFINE_DRM_GEM_CMA_FOPS(fops);
>>>>  
>>>>  static struct drm_driver aspeed_gfx_driver = {
>>>>  	.driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
>>>> -	.gem_create_object	= drm_cma_gem_create_object_default_funcs,
>>>> +	.gem_create_object	= drm_gem_cma_create_object_default_funcs,
>>>>  	.dumb_create		= drm_gem_cma_dumb_create,
>>>>  	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
>>>>  	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
>>>> diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_gem_cma_helper.c
>>>> index b3db3ca7bd7a7..842e2fa332354 100644
>>>> --- a/drivers/gpu/drm/drm_gem_cma_helper.c
>>>> +++ b/drivers/gpu/drm/drm_gem_cma_helper.c
>>>> @@ -572,7 +572,7 @@ void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
>>>>  }
>>>>  EXPORT_SYMBOL_GPL(drm_gem_cma_prime_vunmap);
>>>>  
>>>> -static const struct drm_gem_object_funcs drm_cma_gem_default_funcs = {
>>>> +static const struct drm_gem_object_funcs drm_gem_cma_default_funcs = {
>>>>  	.free = drm_gem_cma_free_object,
>>>>  	.print_info = drm_gem_cma_print_info,
>>>>  	.get_sg_table = drm_gem_cma_prime_get_sg_table,
>>>> @@ -581,7 +581,7 @@ static const struct drm_gem_object_funcs drm_cma_gem_default_funcs = {
>>>>  };
>>>>  
>>>>  /**
>>>> - * drm_cma_gem_create_object_default_funcs - Create a CMA GEM object with a
>>>> + * drm_gem_cma_create_object_default_funcs - Create a CMA GEM object with a
>>>>   *                                           default function table
>>>>   * @dev: DRM device
>>>>   * @size: Size of the object to allocate
>>>> @@ -593,7 +593,7 @@ static const struct drm_gem_object_funcs drm_cma_gem_default_funcs = {
>>>>   * A pointer to a allocated GEM object or an error pointer on failure.
>>>>   */
>>>>  struct drm_gem_object *
>>>> -drm_cma_gem_create_object_default_funcs(struct drm_device *dev, size_t size)
>>>> +drm_gem_cma_create_object_default_funcs(struct drm_device *dev, size_t size)
>>>>  {
>>>>  	struct drm_gem_cma_object *cma_obj;
>>>>  
>>>> @@ -601,11 +601,11 @@ drm_cma_gem_create_object_default_funcs(struct drm_device *dev, size_t size)
>>>>  	if (!cma_obj)
>>>>  		return NULL;
>>>>  
>>>> -	cma_obj->base.funcs = &drm_cma_gem_default_funcs;
>>>> +	cma_obj->base.funcs = &drm_gem_cma_default_funcs;
>>>>  
>>>>  	return &cma_obj->base;
>>>>  }
>>>> -EXPORT_SYMBOL(drm_cma_gem_create_object_default_funcs);
>>>> +EXPORT_SYMBOL(drm_gem_cma_create_object_default_funcs);
>>>>  
>>>>  /**
>>>>   * drm_gem_cma_prime_import_sg_table_vmap - PRIME import another driver's
>>>> diff --git a/include/drm/drm_gem_cma_helper.h b/include/drm/drm_gem_cma_helper.h
>>>> index 947ac95eb24a9..64b7e9d42129a 100644
>>>> --- a/include/drm/drm_gem_cma_helper.h
>>>> +++ b/include/drm/drm_gem_cma_helper.h
>>>> @@ -107,7 +107,7 @@ void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj);
>>>>  void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
>>>>  
>>>>  struct drm_gem_object *
>>>> -drm_cma_gem_create_object_default_funcs(struct drm_device *dev, size_t size);
>>>> +drm_gem_cma_create_object_default_funcs(struct drm_device *dev, size_t size);
>>>>  
>>>>  /**
>>>>   * DRM_GEM_CMA_VMAP_DRIVER_OPS - CMA GEM driver operations ensuring a virtual
>>>> @@ -118,7 +118,7 @@ drm_cma_gem_create_object_default_funcs(struct drm_device *dev, size_t size);
>>>>   * imported buffers.
>>>>   */
>>>>  #define DRM_GEM_CMA_VMAP_DRIVER_OPS \
>>>> -	.gem_create_object	= drm_cma_gem_create_object_default_funcs, \
>>>> +	.gem_create_object	= drm_gem_cma_create_object_default_funcs, \
>>>>  	.dumb_create		= drm_gem_cma_dumb_create, \
>>>>  	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd, \
>>>>  	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle, \
>>>
>>
>> -- 
>> Thomas Zimmermann
>> Graphics Driver Developer
>> SUSE Software Solutions Germany GmbH
>> Maxfeldstr. 5, 90409 Nürnberg, Germany
>> (HRB 36809, AG Nürnberg)
>> Geschäftsführer: Felix Imendörffer
>>
> 
> 
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer


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