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

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