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
27 #include <linux/dma-buf.h>
28
29 #include <drm/drm_prime.h>
30 #include <drm/radeon_drm.h>
31
32 #include "radeon.h"
33
radeon_gem_prime_get_sg_table(struct drm_gem_object * obj)34 struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj)
35 {
36 struct radeon_bo *bo = gem_to_radeon_bo(obj);
37 int npages = bo->tbo.num_pages;
38
39 return drm_prime_pages_to_sg(obj->dev, bo->tbo.ttm->pages, npages);
40 }
41
radeon_gem_prime_vmap(struct drm_gem_object * obj)42 void *radeon_gem_prime_vmap(struct drm_gem_object *obj)
43 {
44 struct radeon_bo *bo = gem_to_radeon_bo(obj);
45 int ret;
46
47 ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages,
48 &bo->dma_buf_vmap);
49 if (ret)
50 return ERR_PTR(ret);
51
52 return bo->dma_buf_vmap.virtual;
53 }
54
radeon_gem_prime_vunmap(struct drm_gem_object * obj,void * vaddr)55 void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
56 {
57 struct radeon_bo *bo = gem_to_radeon_bo(obj);
58
59 ttm_bo_kunmap(&bo->dma_buf_vmap);
60 }
61
radeon_gem_prime_import_sg_table(struct drm_device * dev,struct dma_buf_attachment * attach,struct sg_table * sg)62 struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev,
63 struct dma_buf_attachment *attach,
64 struct sg_table *sg)
65 {
66 struct dma_resv *resv = attach->dmabuf->resv;
67 struct radeon_device *rdev = dev->dev_private;
68 struct radeon_bo *bo;
69 int ret;
70
71 dma_resv_lock(resv, NULL);
72 ret = radeon_bo_create(rdev, attach->dmabuf->size, PAGE_SIZE, false,
73 RADEON_GEM_DOMAIN_GTT, 0, sg, resv, &bo);
74 dma_resv_unlock(resv);
75 if (ret)
76 return ERR_PTR(ret);
77
78 mutex_lock(&rdev->gem.mutex);
79 list_add_tail(&bo->list, &rdev->gem.objects);
80 mutex_unlock(&rdev->gem.mutex);
81
82 bo->prime_shared_count = 1;
83 return &bo->tbo.base;
84 }
85
radeon_gem_prime_pin(struct drm_gem_object * obj)86 int radeon_gem_prime_pin(struct drm_gem_object *obj)
87 {
88 struct radeon_bo *bo = gem_to_radeon_bo(obj);
89 int ret = 0;
90
91 ret = radeon_bo_reserve(bo, false);
92 if (unlikely(ret != 0))
93 return ret;
94
95 /* pin buffer into GTT */
96 ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL);
97 if (unlikely(ret))
98 goto error;
99
100 if (bo->tbo.moving) {
101 ret = dma_fence_wait(bo->tbo.moving, false);
102 if (unlikely(ret)) {
103 radeon_bo_unpin(bo);
104 goto error;
105 }
106 }
107
108 bo->prime_shared_count++;
109 error:
110 radeon_bo_unreserve(bo);
111 return ret;
112 }
113
radeon_gem_prime_unpin(struct drm_gem_object * obj)114 void radeon_gem_prime_unpin(struct drm_gem_object *obj)
115 {
116 struct radeon_bo *bo = gem_to_radeon_bo(obj);
117 int ret = 0;
118
119 ret = radeon_bo_reserve(bo, false);
120 if (unlikely(ret != 0))
121 return;
122
123 radeon_bo_unpin(bo);
124 if (bo->prime_shared_count)
125 bo->prime_shared_count--;
126 radeon_bo_unreserve(bo);
127 }
128
129
radeon_gem_prime_export(struct drm_gem_object * gobj,int flags)130 struct dma_buf *radeon_gem_prime_export(struct drm_gem_object *gobj,
131 int flags)
132 {
133 struct radeon_bo *bo = gem_to_radeon_bo(gobj);
134 if (radeon_ttm_tt_has_userptr(bo->rdev, bo->tbo.ttm))
135 return ERR_PTR(-EPERM);
136 return drm_gem_prime_export(gobj, flags);
137 }
138