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 <glisse@freedesktop.org>
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, u32 suballoc_align, u32 domain)
50{
51 int r;
52
53 r = amdgpu_bo_create_kernel(adev, size, AMDGPU_GPU_PAGE_SIZE, domain,
54 bo_ptr: &sa_manager->bo, gpu_addr: &sa_manager->gpu_addr,
55 cpu_addr: &sa_manager->cpu_ptr);
56 if (r) {
57 dev_err(adev->dev, "(%d) failed to allocate bo for manager\n", r);
58 return r;
59 }
60
61 memset(sa_manager->cpu_ptr, 0, size);
62 drm_suballoc_manager_init(sa_manager: &sa_manager->base, size, align: suballoc_align);
63 return r;
64}
65
66void amdgpu_sa_bo_manager_fini(struct amdgpu_device *adev,
67 struct amdgpu_sa_manager *sa_manager)
68{
69 if (sa_manager->bo == NULL) {
70 dev_err(adev->dev, "no bo for sa manager\n");
71 return;
72 }
73
74 drm_suballoc_manager_fini(sa_manager: &sa_manager->base);
75
76 amdgpu_bo_free_kernel(bo: &sa_manager->bo, gpu_addr: &sa_manager->gpu_addr, cpu_addr: &sa_manager->cpu_ptr);
77}
78
79int amdgpu_sa_bo_new(struct amdgpu_sa_manager *sa_manager,
80 struct drm_suballoc **sa_bo,
81 unsigned int size)
82{
83 struct drm_suballoc *sa = drm_suballoc_new(sa_manager: &sa_manager->base, size,
84 GFP_KERNEL, intr: false, align: 0);
85
86 if (IS_ERR(ptr: sa)) {
87 *sa_bo = NULL;
88
89 return PTR_ERR(ptr: sa);
90 }
91
92 *sa_bo = sa;
93 return 0;
94}
95
96void amdgpu_sa_bo_free(struct drm_suballoc **sa_bo, struct dma_fence *fence)
97{
98 if (sa_bo == NULL || *sa_bo == NULL) {
99 return;
100 }
101
102 drm_suballoc_free(sa: *sa_bo, fence);
103 *sa_bo = NULL;
104}
105
106#if defined(CONFIG_DEBUG_FS)
107
108void amdgpu_sa_bo_dump_debug_info(struct amdgpu_sa_manager *sa_manager,
109 struct seq_file *m)
110{
111 struct drm_printer p = drm_seq_file_printer(f: m);
112
113 drm_suballoc_dump_debug_info(sa_manager: &sa_manager->base, p: &p, suballoc_base: sa_manager->gpu_addr);
114}
115#endif
116

source code of linux/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c