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 	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 	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, 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  */
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, true, NULL, false);
84 	if (r) {
85 		DRM_ERROR("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");
93 		return -ENOMEM;
94 	}
95 
96 	r = amdgpu_vm_bo_map(adev, *bo_va, csa_addr, 0, size,
97 			     AMDGPU_PTE_READABLE | AMDGPU_PTE_WRITEABLE |
98 			     AMDGPU_PTE_EXECUTABLE);
99 
100 	if (r) {
101 		DRM_ERROR("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 }
110