File: | dev/pci/drm/amd/amdgpu/amdgpu_csa.c |
Warning: | line 43, column 2 Value stored to 'r' is never read |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
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_SHIFT12; |
30 | |
31 | addr -= AMDGPU_VA_RESERVED_SIZE(2ULL << 20); |
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 | int r; |
41 | void *ptr; |
42 | |
43 | r = amdgpu_bo_create_kernel(adev, size, PAGE_SIZE(1 << 12), |
Value stored to 'r' is never read | |
44 | domain, bo, |
45 | NULL((void *)0), &ptr); |
46 | if (!*bo) |
47 | return -ENOMEM12; |
48 | |
49 | memset(ptr, 0, size)__builtin_memset((ptr), (0), (size)); |
50 | adev->virt.csa_cpu_addr = ptr; |
51 | return 0; |
52 | } |
53 | |
54 | void amdgpu_free_static_csa(struct amdgpu_bo **bo) |
55 | { |
56 | amdgpu_bo_free_kernel(bo, NULL((void *)0), NULL((void *)0)); |
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 | */ |
65 | int 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 ww_acquire_ctx ticket; |
70 | struct list_head list; |
71 | struct amdgpu_bo_list_entry pd; |
72 | struct ttm_validate_buffer csa_tv; |
73 | int r; |
74 | |
75 | INIT_LIST_HEAD(&list); |
76 | INIT_LIST_HEAD(&csa_tv.head); |
77 | csa_tv.bo = &bo->tbo; |
78 | csa_tv.num_shared = 1; |
79 | |
80 | list_add(&csa_tv.head, &list); |
81 | amdgpu_vm_get_pd_bo(vm, &list, &pd); |
82 | |
83 | r = ttm_eu_reserve_buffers(&ticket, &list, true1, NULL((void *)0)); |
84 | if (r) { |
85 | DRM_ERROR("failed to reserve CSA,PD BOs: err=%d\n", r)__drm_err("failed to reserve CSA,PD BOs: err=%d\n", r); |
86 | return r; |
87 | } |
88 | |
89 | *bo_va = amdgpu_vm_bo_add(adev, vm, bo); |
90 | if (!*bo_va) { |
91 | ttm_eu_backoff_reservation(&ticket, &list); |
92 | DRM_ERROR("failed to create bo_va for static CSA\n")__drm_err("failed to create bo_va for static CSA\n"); |
93 | return -ENOMEM12; |
94 | } |
95 | |
96 | r = amdgpu_vm_bo_map(adev, *bo_va, csa_addr, 0, size, |
97 | AMDGPU_PTE_READABLE(1ULL << 5) | AMDGPU_PTE_WRITEABLE(1ULL << 6) | |
98 | AMDGPU_PTE_EXECUTABLE(1ULL << 4)); |
99 | |
100 | if (r) { |
101 | DRM_ERROR("failed to do bo_map on static CSA, err=%d\n", r)__drm_err("failed to do bo_map on static CSA, err=%d\n", r); |
102 | amdgpu_vm_bo_rmv(adev, *bo_va); |
103 | ttm_eu_backoff_reservation(&ticket, &list); |
104 | return r; |
105 | } |
106 | |
107 | ttm_eu_backoff_reservation(&ticket, &list); |
108 | return 0; |
109 | } |