1 /*
2  * Copyright 2016 Advanced Micro Devices, Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21 
22  * * Author: Monk.liu@amd.com
23  */
24 
25 #include "amdgpu.h"
26 
27 uint64_t amdgpu_csa_vaddr(struct amdgpu_device *adev)
28 {
29 	uint64_t addr = adev->vm_manager.max_pfn << AMDGPU_GPU_PAGE_SHIFT;
30 
31 	addr -= AMDGPU_VA_RESERVED_SIZE;
32 	addr = amdgpu_gmc_sign_extend(addr);
33 
34 	return addr;
35 }
36 
37 int amdgpu_allocate_static_csa(struct amdgpu_device *adev, struct amdgpu_bo **bo,
38 				u32 domain, uint32_t size)
39 {
40 	void *ptr;
41 
42 	amdgpu_bo_create_kernel(adev, size, PAGE_SIZE,
43 				domain, bo,
44 				NULL, &ptr);
45 	if (!*bo)
46 		return -ENOMEM;
47 
48 	memset(ptr, 0, size);
49 	adev->virt.csa_cpu_addr = ptr;
50 	return 0;
51 }
52 
53 void amdgpu_free_static_csa(struct amdgpu_bo **bo)
54 {
55 	amdgpu_bo_free_kernel(bo, NULL, NULL);
56 }
57 
58 /*
59  * amdgpu_map_static_csa should be called during amdgpu_vm_init
60  * it maps virtual address amdgpu_csa_vaddr() to this VM, and each command
61  * submission of GFX should use this virtual address within META_DATA init
62  * package to support SRIOV gfx preemption.
63  */
64 int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm,
65 			  struct amdgpu_bo *bo, struct amdgpu_bo_va **bo_va,
66 			  uint64_t csa_addr, uint32_t size)
67 {
68 	struct ww_acquire_ctx ticket;
69 	struct list_head list;
70 	struct amdgpu_bo_list_entry pd;
71 	struct ttm_validate_buffer csa_tv;
72 	int r;
73 
74 	INIT_LIST_HEAD(&list);
75 	INIT_LIST_HEAD(&csa_tv.head);
76 	csa_tv.bo = &bo->tbo;
77 	csa_tv.num_shared = 1;
78 
79 	list_add(&csa_tv.head, &list);
80 	amdgpu_vm_get_pd_bo(vm, &list, &pd);
81 
82 	r = ttm_eu_reserve_buffers(&ticket, &list, true, NULL);
83 	if (r) {
84 		DRM_ERROR("failed to reserve CSA,PD BOs: err=%d\n", r);
85 		return r;
86 	}
87 
88 	*bo_va = amdgpu_vm_bo_add(adev, vm, bo);
89 	if (!*bo_va) {
90 		ttm_eu_backoff_reservation(&ticket, &list);
91 		DRM_ERROR("failed to create bo_va for static CSA\n");
92 		return -ENOMEM;
93 	}
94 
95 	r = amdgpu_vm_bo_map(adev, *bo_va, csa_addr, 0, size,
96 			     AMDGPU_PTE_READABLE | AMDGPU_PTE_WRITEABLE |
97 			     AMDGPU_PTE_EXECUTABLE);
98 
99 	if (r) {
100 		DRM_ERROR("failed to do bo_map on static CSA, err=%d\n", r);
101 		amdgpu_vm_bo_del(adev, *bo_va);
102 		ttm_eu_backoff_reservation(&ticket, &list);
103 		return r;
104 	}
105 
106 	ttm_eu_backoff_reservation(&ticket, &list);
107 	return 0;
108 }
109 
110 int amdgpu_unmap_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm,
111 			    struct amdgpu_bo *bo, struct amdgpu_bo_va *bo_va,
112 			    uint64_t csa_addr)
113 {
114 	struct ww_acquire_ctx ticket;
115 	struct list_head list;
116 	struct amdgpu_bo_list_entry pd;
117 	struct ttm_validate_buffer csa_tv;
118 	int r;
119 
120 	INIT_LIST_HEAD(&list);
121 	INIT_LIST_HEAD(&csa_tv.head);
122 	csa_tv.bo = &bo->tbo;
123 	csa_tv.num_shared = 1;
124 
125 	list_add(&csa_tv.head, &list);
126 	amdgpu_vm_get_pd_bo(vm, &list, &pd);
127 
128 	r = ttm_eu_reserve_buffers(&ticket, &list, true, NULL);
129 	if (r) {
130 		DRM_ERROR("failed to reserve CSA,PD BOs: err=%d\n", r);
131 		return r;
132 	}
133 
134 	r = amdgpu_vm_bo_unmap(adev, bo_va, csa_addr);
135 	if (r) {
136 		DRM_ERROR("failed to do bo_unmap on static CSA, err=%d\n", r);
137 		ttm_eu_backoff_reservation(&ticket, &list);
138 		return r;
139 	}
140 
141 	amdgpu_vm_bo_del(adev, bo_va);
142 
143 	ttm_eu_backoff_reservation(&ticket, &list);
144 
145 	return 0;
146 }
147