[PATCH v2] DRM: add drm gem cma helper

[Sascha Hauer]

On Tue, Jun 05, 2012 at 10:54:10PM +0900, InKi Dae wrote:
> 2012/6/5 Sascha Hauer <s.hauer at pengutronix.de>:
> > On Fri, Jun 01, 2012 at 12:29:47AM +0900, InKi Dae wrote:
> >> Hi Sascha,
> >>
> >> >> +struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
> >> >> +             unsigned int size)
> >> >> +{
> >> >> +     struct drm_gem_cma_object *cma_obj;
> >> >> +     struct drm_gem_object *gem_obj;
> >> >> +     int ret;
> >> >> +
> >> >> +     size = round_up(size, PAGE_SIZE);
> >> >> +
> >> >> +     cma_obj = kzalloc(sizeof(*cma_obj), GFP_KERNEL);
> >> >> +     if (!cma_obj)
> >> >> +             return ERR_PTR(-ENOMEM);
> >> >> +
> >> >> +     cma_obj->vaddr = dma_alloc_writecombine(drm->dev, size,
> >> >> +                     &cma_obj->paddr, GFP_KERNEL | __GFP_NOWARN);
> >>
> >> how about calling drm_gem_cma_buf_allocate() instead of
> >> dma_alloc_wirtecombine() for consistency in using dma api so its call
> >> flow would be "dma_gem_cma_buf_allocate() ->
> >> dma_alloc_writecombine()".
> >
> > What do you mean? There is no drm_gem_cma_buf_allocate() function.
> >
> 
> I mean have a pair with drm_gem_cma_buf_destroy() otherwise how about
> removing dem_gem_cma_buf_destroy() and calling dma_free_writecombine()
> directly? drm_gem_cma_buf_destroy() is just a wrapper to
> dma_free_writecombine().

Ok, then I'll remove drm_gem_cma_buf_destroy() and use
dma_free_writecombine() directly instead.


Sascha

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