1/*
  2 * Copyright 2012 Advanced Micro Devices, Inc.
  3 *
  4 * Permission is hereby granted, free of charge, to any person obtaining a
  5 * copy of this software and associated documentation files (the "Software"),
  6 * to deal in the Software without restriction, including without limitation
  7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8 * and/or sell copies of the Software, and to permit persons to whom the
  9 * Software is furnished to do so, subject to the following conditions:
 10 *
 11 * The above copyright notice and this permission notice shall be included in
 12 * all copies or substantial portions of the Software.
 13 *
 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 20 * OTHER DEALINGS IN THE SOFTWARE.
 21 *
 22 * based on nouveau_prime.c
 23 *
 24 * Authors: Alex Deucher
 25 */
 26#include <drm/drmP.h>
 27
 28#include "radeon.h"
 29#include <drm/radeon_drm.h>
 30
 31struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj)
 32{
 33	struct radeon_bo *bo = gem_to_radeon_bo(obj);
 34	int npages = bo->tbo.num_pages;
 35
 36	return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages);
 37}
 38
 39void *radeon_gem_prime_vmap(struct drm_gem_object *obj)
 40{
 41	struct radeon_bo *bo = gem_to_radeon_bo(obj);
 42	int ret;
 43
 44	ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages,
 45			  &bo->dma_buf_vmap);
 46	if (ret)
 47		return ERR_PTR(ret);
 48
 49	return bo->dma_buf_vmap.virtual;
 50}
 51
 52void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
 53{
 54	struct radeon_bo *bo = gem_to_radeon_bo(obj);
 55
 56	ttm_bo_kunmap(&bo->dma_buf_vmap);
 57}
 58
 59struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev,
 60							size_t size,
 61							struct sg_table *sg)
 62{
 63	struct radeon_device *rdev = dev->dev_private;
 64	struct radeon_bo *bo;
 65	int ret;
 66
 67	ret = radeon_bo_create(rdev, size, PAGE_SIZE, false,
 68			       RADEON_GEM_DOMAIN_GTT, sg, &bo);
 69	if (ret)
 70		return ERR_PTR(ret);
 71
 72	mutex_lock(&rdev->gem.mutex);
 73	list_add_tail(&bo->list, &rdev->gem.objects);
 74	mutex_unlock(&rdev->gem.mutex);
 75
 76	return &bo->gem_base;
 77}
 78
 79int radeon_gem_prime_pin(struct drm_gem_object *obj)
 80{
 81	struct radeon_bo *bo = gem_to_radeon_bo(obj);
 82	int ret = 0;
 83
 84	ret = radeon_bo_reserve(bo, false);
 85	if (unlikely(ret != 0))
 86		return ret;
 87
 88	/* pin buffer into GTT */
 89	ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL);
 90	radeon_bo_unreserve(bo);
 91	return ret;
 92}
 93
 94void radeon_gem_prime_unpin(struct drm_gem_object *obj)
 95{
 96	struct radeon_bo *bo = gem_to_radeon_bo(obj);
 97	int ret = 0;
 98
 99	ret = radeon_bo_reserve(bo, false);
100	if (unlikely(ret != 0))
101		return;
102
103	radeon_bo_unpin(bo);
104	radeon_bo_unreserve(bo);
105}