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 
47 int 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 
66 void 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 
79 int 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, true, 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 
96 void 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 
109 void 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