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1/*
2 * Copyright 2011 Red Hat Inc.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
16 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
17 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
18 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
19 * USE OR OTHER DEALINGS IN THE SOFTWARE.
20 *
21 * The above copyright notice and this permission notice (including the
22 * next paragraph) shall be included in all copies or substantial portions
23 * of the Software.
24 *
25 */
26/*
27 * Authors:
28 * Jerome Glisse <[email protected]>
29 */
30/* Algorithm:
31 *
32 * We store the last allocated bo in "hole", we always try to allocate
33 * after the last allocated bo. Principle is that in a linear GPU ring
34 * progression was is after last is the oldest bo we allocated and thus
35 * the first one that should no longer be in use by the GPU.
36 *
37 * If it's not the case we skip over the bo after last to the closest
38 * done bo if such one exist. If none exist and we are not asked to
39 * block we report failure to allocate.
40 *
41 * If we are asked to block we wait on all the oldest fence of all
42 * rings. We just wait for any of those fence to complete.
43 */
44
45#include "amdgpu.h"
46
47int amdgpu_sa_bo_manager_init(struct amdgpu_device *adev,
48 struct amdgpu_sa_manager *sa_manager,
49 unsigned int size, gfp_t gfp_flags)
50{
51 int r;
52
53 sa_manager->gfp_flags = gfp_flags;
54 r = amdgpu_bo_create_kernel(adev, size, AMDGPU_GPU_PAGE_SIZE,
55 AMDGPU_GEM_DOMAIN_GTT,
56 &sa_manager->bo, &sa_manager->gpu_addr,
57 &sa_manager->cpu_ptr);
58 if (r) {
59 dev_err(adev->dev, "(%d) failed to allocate bo for manager\n", r);
60 return r;
61 }
62
63 memset(sa_manager->cpu_ptr, 0, size);
64 drm_suballoc_manager_init(&sa_manager->base, size, 256);
65
66 return r;
67}
68
69void amdgpu_sa_bo_manager_fini(struct amdgpu_device *adev,
70 struct amdgpu_sa_manager *sa_manager)
71{
72 if (sa_manager->bo == NULL) {
73 dev_err(adev->dev, "no bo for sa manager\n");
74 return;
75 }
76
77 drm_suballoc_manager_fini(&sa_manager->base);
78
79 amdgpu_bo_free_kernel(&sa_manager->bo, &sa_manager->gpu_addr,
80 &sa_manager->cpu_ptr);
81}
82
83int amdgpu_sa_bo_new(struct amdgpu_sa_manager *sa_manager,
84 struct drm_suballoc **sa_bo,
85 unsigned int size)
86{
87 struct drm_suballoc *sa = drm_suballoc_new(&sa_manager->base, size,
88 sa_manager->gfp_flags,
89 false, 0);
90
91 if (IS_ERR(sa)) {
92 *sa_bo = NULL;
93
94 return PTR_ERR(sa);
95 }
96
97 *sa_bo = sa;
98 return 0;
99}
100
101void amdgpu_sa_bo_free(struct drm_suballoc **sa_bo, struct dma_fence *fence)
102{
103 if (sa_bo == NULL || *sa_bo == NULL) {
104 return;
105 }
106
107 drm_suballoc_free(*sa_bo, fence);
108 *sa_bo = NULL;
109}
110
111#if defined(CONFIG_DEBUG_FS)
112
113void amdgpu_sa_bo_dump_debug_info(struct amdgpu_sa_manager *sa_manager,
114 struct seq_file *m)
115{
116 struct drm_printer p = drm_seq_file_printer(m);
117
118 drm_suballoc_dump_debug_info(&sa_manager->base, &p,
119 sa_manager->gpu_addr);
120}
121#endif