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
27uint64_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
37int amdgpu_allocate_static_csa(struct amdgpu_device *adev, struct amdgpu_bo **bo,
38 u32 domain, uint32_t size)
39{
40 int r;
41 void *ptr;
42
43 r = amdgpu_bo_create_kernel(adev, size, PAGE_SIZE,
44 domain, bo,
45 NULL, &ptr);
46 if (!*bo)
47 return -ENOMEM;
48
49 memset(ptr, 0, size);
50 return 0;
51}
52
53void 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 */
64int 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_alloc_pts(adev, (*bo_va)->base.vm, csa_addr,
96 size);
97 if (r) {
98 DRM_ERROR("failed to allocate pts for static CSA, err=%d\n", r);
99 amdgpu_vm_bo_rmv(adev, *bo_va);
100 ttm_eu_backoff_reservation(&ticket, &list);
101 return r;
102 }
103
104 r = amdgpu_vm_bo_map(adev, *bo_va, csa_addr, 0, size,
105 AMDGPU_PTE_READABLE | AMDGPU_PTE_WRITEABLE |
106 AMDGPU_PTE_EXECUTABLE);
107
108 if (r) {
109 DRM_ERROR("failed to do bo_map on static CSA, err=%d\n", r);
110 amdgpu_vm_bo_rmv(adev, *bo_va);
111 ttm_eu_backoff_reservation(&ticket, &list);
112 return r;
113 }
114
115 ttm_eu_backoff_reservation(&ticket, &list);
116 return 0;
117}
118