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 <drm/drm_exec.h>
26
27#include "amdgpu.h"
28
29uint64_t amdgpu_csa_vaddr(struct amdgpu_device *adev)
30{
31 uint64_t addr = adev->vm_manager.max_pfn << AMDGPU_GPU_PAGE_SHIFT;
32
33 addr -= AMDGPU_VA_RESERVED_SIZE;
34 addr = amdgpu_gmc_sign_extend(addr);
35
36 return addr;
37}
38
39int amdgpu_allocate_static_csa(struct amdgpu_device *adev, struct amdgpu_bo **bo,
40 u32 domain, uint32_t size)
41{
42 void *ptr;
43
44 amdgpu_bo_create_kernel(adev, size, PAGE_SIZE,
45 domain, bo_ptr: bo,
46 NULL, cpu_addr: &ptr);
47 if (!*bo)
48 return -ENOMEM;
49
50 memset(ptr, 0, size);
51 adev->virt.csa_cpu_addr = ptr;
52 return 0;
53}
54
55void amdgpu_free_static_csa(struct amdgpu_bo **bo)
56{
57 amdgpu_bo_free_kernel(bo, NULL, NULL);
58}
59
60/*
61 * amdgpu_map_static_csa should be called during amdgpu_vm_init
62 * it maps virtual address amdgpu_csa_vaddr() to this VM, and each command
63 * submission of GFX should use this virtual address within META_DATA init
64 * package to support SRIOV gfx preemption.
65 */
66int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm,
67 struct amdgpu_bo *bo, struct amdgpu_bo_va **bo_va,
68 uint64_t csa_addr, uint32_t size)
69{
70 struct drm_exec exec;
71 int r;
72
73 drm_exec_init(exec: &exec, DRM_EXEC_INTERRUPTIBLE_WAIT);
74 drm_exec_until_all_locked(&exec) {
75 r = amdgpu_vm_lock_pd(vm, exec: &exec, num_fences: 0);
76 if (likely(!r))
77 r = drm_exec_lock_obj(exec: &exec, obj: &bo->tbo.base);
78 drm_exec_retry_on_contention(&exec);
79 if (unlikely(r)) {
80 DRM_ERROR("failed to reserve CSA,PD BOs: err=%d\n", r);
81 goto error;
82 }
83 }
84
85 *bo_va = amdgpu_vm_bo_add(adev, vm, bo);
86 if (!*bo_va) {
87 r = -ENOMEM;
88 goto error;
89 }
90
91 r = amdgpu_vm_bo_map(adev, bo_va: *bo_va, addr: csa_addr, offset: 0, size,
92 AMDGPU_PTE_READABLE | AMDGPU_PTE_WRITEABLE |
93 AMDGPU_PTE_EXECUTABLE);
94
95 if (r) {
96 DRM_ERROR("failed to do bo_map on static CSA, err=%d\n", r);
97 amdgpu_vm_bo_del(adev, bo_va: *bo_va);
98 goto error;
99 }
100
101error:
102 drm_exec_fini(exec: &exec);
103 return r;
104}
105
106int amdgpu_unmap_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm,
107 struct amdgpu_bo *bo, struct amdgpu_bo_va *bo_va,
108 uint64_t csa_addr)
109{
110 struct drm_exec exec;
111 int r;
112
113 drm_exec_init(exec: &exec, DRM_EXEC_INTERRUPTIBLE_WAIT);
114 drm_exec_until_all_locked(&exec) {
115 r = amdgpu_vm_lock_pd(vm, exec: &exec, num_fences: 0);
116 if (likely(!r))
117 r = drm_exec_lock_obj(exec: &exec, obj: &bo->tbo.base);
118 drm_exec_retry_on_contention(&exec);
119 if (unlikely(r)) {
120 DRM_ERROR("failed to reserve CSA,PD BOs: err=%d\n", r);
121 goto error;
122 }
123 }
124
125 r = amdgpu_vm_bo_unmap(adev, bo_va, addr: csa_addr);
126 if (r) {
127 DRM_ERROR("failed to do bo_unmap on static CSA, err=%d\n", r);
128 goto error;
129 }
130
131 amdgpu_vm_bo_del(adev, bo_va);
132
133error:
134 drm_exec_fini(exec: &exec);
135 return r;
136}
137

source code of linux/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c