Hi Rob,
Thank you for the patch.
On Mon, Oct 21, 2019 at 04:45:47PM -0500, Rob Herring wrote:
> In preparation to allow DRM CMA users to adjust the DMA_ATTR_* flags,
> convert the CMA helper code to use the dma_*_attr APIs instead of the
> dma_*_wc variants.
>
> Only the DMA_ATTR_WRITE_COMBINE and DMA_ATTR_NO_WARN attributes are set
> in this commit, so there's no functional change.
Apart from the documentation issue reported by kbuild,
Reviewed-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> Cc: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
> Cc: Maxime Ripard <mrip...@kernel.org>
> Cc: Sean Paul <s...@poorly.run>
> Cc: David Airlie <airl...@linux.ie>
> Cc: Daniel Vetter <dan...@ffwll.ch>
> Signed-off-by: Rob Herring <r...@kernel.org>
> ---
> drivers/gpu/drm/drm_gem_cma_helper.c | 20 ++++++++++++--------
> include/drm/drm_gem_cma_helper.h | 1 +
> 2 files changed, 13 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c
> b/drivers/gpu/drm/drm_gem_cma_helper.c
> index 12e98fb28229..4cebfe01e6ea 100644
> --- a/drivers/gpu/drm/drm_gem_cma_helper.c
> +++ b/drivers/gpu/drm/drm_gem_cma_helper.c
> @@ -70,6 +70,7 @@ __drm_gem_cma_create(struct drm_device *drm, size_t size)
> goto error;
> }
>
> + cma_obj->dma_attrs |= DMA_ATTR_NO_WARN | DMA_ATTR_WRITE_COMBINE;
> return cma_obj;
>
> error:
> @@ -102,8 +103,9 @@ struct drm_gem_cma_object *drm_gem_cma_create(struct
> drm_device *drm,
> if (IS_ERR(cma_obj))
> return cma_obj;
>
> - cma_obj->vaddr = dma_alloc_wc(drm->dev, size, &cma_obj->paddr,
> - GFP_KERNEL | __GFP_NOWARN);
> + cma_obj->vaddr = dma_alloc_attrs(drm->dev, size, &cma_obj->paddr,
> + GFP_KERNEL | __GFP_NOWARN,
> + cma_obj->dma_attrs);
> if (!cma_obj->vaddr) {
> dev_dbg(drm->dev, "failed to allocate buffer with size %zu\n",
> size);
> @@ -184,8 +186,9 @@ void drm_gem_cma_free_object(struct drm_gem_object
> *gem_obj)
> dma_buf_vunmap(gem_obj->import_attach->dmabuf,
> cma_obj->vaddr);
> drm_prime_gem_destroy(gem_obj, cma_obj->sgt);
> } else if (cma_obj->vaddr) {
> - dma_free_wc(gem_obj->dev->dev, cma_obj->base.size,
> - cma_obj->vaddr, cma_obj->paddr);
> + dma_free_attrs(gem_obj->dev->dev, cma_obj->base.size,
> + cma_obj->vaddr, cma_obj->paddr,
> + cma_obj->dma_attrs);
> }
>
> drm_gem_object_release(gem_obj);
> @@ -279,8 +282,9 @@ static int drm_gem_cma_mmap_obj(struct drm_gem_cma_object
> *cma_obj,
> vma->vm_flags &= ~VM_PFNMAP;
> vma->vm_pgoff = 0;
>
> - ret = dma_mmap_wc(cma_obj->base.dev->dev, vma, cma_obj->vaddr,
> - cma_obj->paddr, vma->vm_end - vma->vm_start);
> + ret = dma_mmap_attrs(cma_obj->base.dev->dev, vma, cma_obj->vaddr,
> + cma_obj->paddr, vma->vm_end - vma->vm_start,
> + cma_obj->dma_attrs);
> if (ret)
> drm_gem_vm_close(vma);
>
> @@ -434,8 +438,8 @@ struct sg_table *drm_gem_cma_prime_get_sg_table(struct
> drm_gem_object *obj)
> if (!sgt)
> return ERR_PTR(-ENOMEM);
>
> - ret = dma_get_sgtable(obj->dev->dev, sgt, cma_obj->vaddr,
> - cma_obj->paddr, obj->size);
> + ret = dma_get_sgtable_attrs(obj->dev->dev, sgt, cma_obj->vaddr,
> + cma_obj->paddr, obj->size, cma_obj->dma_attrs);
> if (ret < 0)
> goto out;
>
> diff --git a/include/drm/drm_gem_cma_helper.h
> b/include/drm/drm_gem_cma_helper.h
> index 947ac95eb24a..d042213c3595 100644
> --- a/include/drm/drm_gem_cma_helper.h
> +++ b/include/drm/drm_gem_cma_helper.h
> @@ -24,6 +24,7 @@ struct drm_gem_cma_object {
>
> /* For objects with DMA memory allocated by GEM CMA */
> void *vaddr;
> + unsigned long dma_attrs;
> };
>
> #define to_drm_gem_cma_obj(gem_obj) \
--
Regards,
Laurent Pinchart
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