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 
31 struct 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 
39 void *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 
52 void 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 
59 struct 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 
79 int 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 
94 void 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 }
106