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				    &sa_manager->bo, &sa_manager->gpu_addr,
55				    &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->base, size, 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->base);
75
76	amdgpu_bo_free_kernel(&sa_manager->bo, &sa_manager->gpu_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->base, size,
84						   GFP_KERNEL, false, 0);
85
86	if (IS_ERR(sa)) {
87		*sa_bo = NULL;
88
89		return PTR_ERR(sa);
90	}
91
92	*sa_bo = sa;
93	return 0;
94}
95
96void amdgpu_sa_bo_free(struct amdgpu_device *adev, struct drm_suballoc **sa_bo,
97		       struct dma_fence *fence)
98{
99	if (sa_bo == NULL || *sa_bo == NULL) {
100		return;
101	}
102
103	drm_suballoc_free(*sa_bo, fence);
104	*sa_bo = NULL;
105}
106
107#if defined(CONFIG_DEBUG_FS)
108
109void amdgpu_sa_bo_dump_debug_info(struct amdgpu_sa_manager *sa_manager,
110				  struct seq_file *m)
111{
112	struct drm_printer p = drm_seq_file_printer(m);
113
114	drm_suballoc_dump_debug_info(&sa_manager->base, &p, sa_manager->gpu_addr);
115}
116#endif
117