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 #include <linux/dma-buf.h>
31
32 struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj);
33 void *radeon_gem_prime_vmap(struct drm_gem_object *obj);
34 void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
35 struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev,
36 struct dma_buf_attachment *attach,
37 struct sg_table *sg);
38 int radeon_gem_prime_pin(struct drm_gem_object *obj);
39 void radeon_gem_prime_unpin(struct drm_gem_object *obj);
40 struct reservation_object *radeon_gem_prime_res_obj(struct drm_gem_object *obj);
41 struct dma_buf *radeon_gem_prime_export(struct drm_device *dev,
42 struct drm_gem_object *gobj,
43 int flags);
44
radeon_gem_prime_get_sg_table(struct drm_gem_object * obj)45 struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj)
46 {
47 struct radeon_bo *bo = gem_to_radeon_bo(obj);
48 int npages = bo->tbo.num_pages;
49
50 return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages);
51 }
52
radeon_gem_prime_vmap(struct drm_gem_object * obj)53 void *radeon_gem_prime_vmap(struct drm_gem_object *obj)
54 {
55 struct radeon_bo *bo = gem_to_radeon_bo(obj);
56 int ret;
57
58 ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages,
59 &bo->dma_buf_vmap);
60 if (ret)
61 return ERR_PTR(ret);
62
63 return bo->dma_buf_vmap.virtual;
64 }
65
radeon_gem_prime_vunmap(struct drm_gem_object * obj,void * vaddr)66 void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
67 {
68 struct radeon_bo *bo = gem_to_radeon_bo(obj);
69
70 ttm_bo_kunmap(&bo->dma_buf_vmap);
71 }
72
radeon_gem_prime_import_sg_table(struct drm_device * dev,struct dma_buf_attachment * attach,struct sg_table * sg)73 struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev,
74 struct dma_buf_attachment *attach,
75 struct sg_table *sg)
76 {
77 struct reservation_object *resv = attach->dmabuf->resv;
78 struct radeon_device *rdev = dev->dev_private;
79 struct radeon_bo *bo;
80 int ret;
81
82 ww_mutex_lock(&resv->lock, NULL);
83 ret = radeon_bo_create(rdev, attach->dmabuf->size, PAGE_SIZE, false,
84 RADEON_GEM_DOMAIN_GTT, 0, sg, resv, &bo);
85 ww_mutex_unlock(&resv->lock);
86 if (ret)
87 return ERR_PTR(ret);
88
89 mutex_lock(&rdev->gem.mutex);
90 list_add_tail(&bo->list, &rdev->gem.objects);
91 mutex_unlock(&rdev->gem.mutex);
92
93 bo->prime_shared_count = 1;
94 return &bo->gem_base;
95 }
96
radeon_gem_prime_pin(struct drm_gem_object * obj)97 int radeon_gem_prime_pin(struct drm_gem_object *obj)
98 {
99 struct radeon_bo *bo = gem_to_radeon_bo(obj);
100 int ret = 0;
101
102 ret = radeon_bo_reserve(bo, false);
103 if (unlikely(ret != 0))
104 return ret;
105
106 /* pin buffer into GTT */
107 ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL);
108 if (likely(ret == 0))
109 bo->prime_shared_count++;
110
111 radeon_bo_unreserve(bo);
112 return ret;
113 }
114
radeon_gem_prime_unpin(struct drm_gem_object * obj)115 void radeon_gem_prime_unpin(struct drm_gem_object *obj)
116 {
117 struct radeon_bo *bo = gem_to_radeon_bo(obj);
118 int ret = 0;
119
120 ret = radeon_bo_reserve(bo, false);
121 if (unlikely(ret != 0))
122 return;
123
124 radeon_bo_unpin(bo);
125 if (bo->prime_shared_count)
126 bo->prime_shared_count--;
127 radeon_bo_unreserve(bo);
128 }
129
130
radeon_gem_prime_res_obj(struct drm_gem_object * obj)131 struct reservation_object *radeon_gem_prime_res_obj(struct drm_gem_object *obj)
132 {
133 struct radeon_bo *bo = gem_to_radeon_bo(obj);
134
135 return bo->tbo.resv;
136 }
137
radeon_gem_prime_export(struct drm_device * dev,struct drm_gem_object * gobj,int flags)138 struct dma_buf *radeon_gem_prime_export(struct drm_device *dev,
139 struct drm_gem_object *gobj,
140 int flags)
141 {
142 struct radeon_bo *bo = gem_to_radeon_bo(gobj);
143 if (radeon_ttm_tt_has_userptr(bo->tbo.ttm))
144 return ERR_PTR(-EPERM);
145 return drm_gem_prime_export(dev, gobj, flags);
146 }
147