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 "radeon.h"
46
47int radeon_sa_bo_manager_init(struct radeon_device *rdev,
48 struct radeon_sa_manager *sa_manager,
49 unsigned int size, u32 sa_align, u32 domain,
50 u32 flags)
51{
52 int r;
53
54 r = radeon_bo_create(rdev, size, RADEON_GPU_PAGE_SIZE, kernel: true,
55 domain, flags, NULL, NULL, bo_ptr: &sa_manager->bo);
56 if (r) {
57 dev_err(rdev->dev, "(%d) failed to allocate bo for manager\n", r);
58 return r;
59 }
60
61 sa_manager->domain = domain;
62
63 drm_suballoc_manager_init(sa_manager: &sa_manager->base, size, align: sa_align);
64
65 return r;
66}
67
68void radeon_sa_bo_manager_fini(struct radeon_device *rdev,
69 struct radeon_sa_manager *sa_manager)
70{
71 drm_suballoc_manager_fini(sa_manager: &sa_manager->base);
72 radeon_bo_unref(bo: &sa_manager->bo);
73}
74
75int radeon_sa_bo_manager_start(struct radeon_device *rdev,
76 struct radeon_sa_manager *sa_manager)
77{
78 int r;
79
80 if (sa_manager->bo == NULL) {
81 dev_err(rdev->dev, "no bo for sa manager\n");
82 return -EINVAL;
83 }
84
85 /* map the buffer */
86 r = radeon_bo_reserve(bo: sa_manager->bo, no_intr: false);
87 if (r) {
88 dev_err(rdev->dev, "(%d) failed to reserve manager bo\n", r);
89 return r;
90 }
91 r = radeon_bo_pin(bo: sa_manager->bo, domain: sa_manager->domain, gpu_addr: &sa_manager->gpu_addr);
92 if (r) {
93 radeon_bo_unreserve(bo: sa_manager->bo);
94 dev_err(rdev->dev, "(%d) failed to pin manager bo\n", r);
95 return r;
96 }
97 r = radeon_bo_kmap(bo: sa_manager->bo, ptr: &sa_manager->cpu_ptr);
98 radeon_bo_unreserve(bo: sa_manager->bo);
99 return r;
100}
101
102int radeon_sa_bo_manager_suspend(struct radeon_device *rdev,
103 struct radeon_sa_manager *sa_manager)
104{
105 int r;
106
107 if (sa_manager->bo == NULL) {
108 dev_err(rdev->dev, "no bo for sa manager\n");
109 return -EINVAL;
110 }
111
112 r = radeon_bo_reserve(bo: sa_manager->bo, no_intr: false);
113 if (!r) {
114 radeon_bo_kunmap(bo: sa_manager->bo);
115 radeon_bo_unpin(bo: sa_manager->bo);
116 radeon_bo_unreserve(bo: sa_manager->bo);
117 }
118 return r;
119}
120
121int radeon_sa_bo_new(struct radeon_sa_manager *sa_manager,
122 struct drm_suballoc **sa_bo,
123 unsigned int size, unsigned int align)
124{
125 struct drm_suballoc *sa = drm_suballoc_new(sa_manager: &sa_manager->base, size,
126 GFP_KERNEL, intr: false, align);
127
128 if (IS_ERR(ptr: sa)) {
129 *sa_bo = NULL;
130 return PTR_ERR(ptr: sa);
131 }
132
133 *sa_bo = sa;
134 return 0;
135}
136
137void radeon_sa_bo_free(struct drm_suballoc **sa_bo,
138 struct radeon_fence *fence)
139{
140 if (sa_bo == NULL || *sa_bo == NULL) {
141 return;
142 }
143
144 if (fence)
145 drm_suballoc_free(sa: *sa_bo, fence: &fence->base);
146 else
147 drm_suballoc_free(sa: *sa_bo, NULL);
148
149 *sa_bo = NULL;
150}
151
152#if defined(CONFIG_DEBUG_FS)
153void radeon_sa_bo_dump_debug_info(struct radeon_sa_manager *sa_manager,
154 struct seq_file *m)
155{
156 struct drm_printer p = drm_seq_file_printer(f: m);
157
158 drm_suballoc_dump_debug_info(sa_manager: &sa_manager->base, p: &p, suballoc_base: sa_manager->gpu_addr);
159}
160#endif
161

source code of linux/drivers/gpu/drm/radeon/radeon_sa.c