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Commit 63bc620b authored by Dave Airlie's avatar Dave Airlie
Browse files

radeon: add radeon prime vmap support. 



This is the same as the nouveau code pretty much.

Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 35916ace

drivers/gpu/drm/radeon/radeon.h

+3 −0
Original line number Diff line number Diff line
@@ -346,6 +346,9 @@ struct radeon_bo { 
	/* Constant after initialization */

	struct radeon_device		*rdev;

	struct drm_gem_object		gem_base;



	struct ttm_bo_kmap_obj dma_buf_vmap;

	int vmapping_count;

};

#define gem_to_radeon_bo(gobj) container_of((gobj), struct radeon_bo, gem_base)

drivers/gpu/drm/radeon/radeon_prime.c

+38 −0
Original line number Diff line number Diff line
@@ -90,6 +90,42 @@ static int radeon_gem_prime_mmap(struct dma_buf *dma_buf, struct vm_area_struct 
	return -EINVAL;

}



static void *radeon_gem_prime_vmap(struct dma_buf *dma_buf)

{

	struct radeon_bo *bo = dma_buf->priv;

	struct drm_device *dev = bo->rdev->ddev;

	int ret;



	mutex_lock(&dev->struct_mutex);

	if (bo->vmapping_count) {

		bo->vmapping_count++;

		goto out_unlock;

	}



	ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages,

			  &bo->dma_buf_vmap);

	if (ret) {

		mutex_unlock(&dev->struct_mutex);

		return ERR_PTR(ret);

	}

	bo->vmapping_count = 1;

out_unlock:

	mutex_unlock(&dev->struct_mutex);

	return bo->dma_buf_vmap.virtual;

}



static void radeon_gem_prime_vunmap(struct dma_buf *dma_buf, void *vaddr)

{

	struct radeon_bo *bo = dma_buf->priv;

	struct drm_device *dev = bo->rdev->ddev;



	mutex_lock(&dev->struct_mutex);

	bo->vmapping_count--;

	if (bo->vmapping_count == 0) {

		ttm_bo_kunmap(&bo->dma_buf_vmap);

	}

	mutex_unlock(&dev->struct_mutex);

}

const static struct dma_buf_ops radeon_dmabuf_ops =  {

	.map_dma_buf = radeon_gem_map_dma_buf,

	.unmap_dma_buf = radeon_gem_unmap_dma_buf,
@@ -99,6 +135,8 @@ const static struct dma_buf_ops radeon_dmabuf_ops = { 
	.kunmap = radeon_gem_kunmap,

	.kunmap_atomic = radeon_gem_kunmap_atomic,

	.mmap = radeon_gem_prime_mmap,

	.vmap = radeon_gem_prime_vmap,

	.vunmap = radeon_gem_prime_vunmap,

};



static int radeon_prime_create(struct drm_device *dev,