1 /* $NetBSD: amdgpu_csa.c,v 1.3 2021/12/19 10:59:01 riastradh Exp $ */
2
3 /*
4 * Copyright 2016 Advanced Micro Devices, Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23
24 * * Author: Monk.liu@amd.com
25 */
26
27 #include <sys/cdefs.h>
28 __KERNEL_RCSID(0, "$NetBSD: amdgpu_csa.c,v 1.3 2021/12/19 10:59:01 riastradh Exp $");
29
30 #include "amdgpu.h"
31
amdgpu_csa_vaddr(struct amdgpu_device * adev)32 uint64_t amdgpu_csa_vaddr(struct amdgpu_device *adev)
33 {
34 uint64_t addr = adev->vm_manager.max_pfn << AMDGPU_GPU_PAGE_SHIFT;
35
36 addr -= AMDGPU_VA_RESERVED_SIZE;
37 addr = amdgpu_gmc_sign_extend(addr);
38
39 return addr;
40 }
41
amdgpu_allocate_static_csa(struct amdgpu_device * adev,struct amdgpu_bo ** bo,u32 domain,uint32_t size)42 int amdgpu_allocate_static_csa(struct amdgpu_device *adev, struct amdgpu_bo **bo,
43 u32 domain, uint32_t size)
44 {
45 int r __unused;
46 void *ptr;
47
48 r = amdgpu_bo_create_kernel(adev, size, PAGE_SIZE,
49 domain, bo,
50 NULL, &ptr);
51 if (!*bo)
52 return -ENOMEM;
53
54 memset(ptr, 0, size);
55 adev->virt.csa_cpu_addr = ptr;
56 return 0;
57 }
58
amdgpu_free_static_csa(struct amdgpu_bo ** bo)59 void amdgpu_free_static_csa(struct amdgpu_bo **bo)
60 {
61 amdgpu_bo_free_kernel(bo, NULL, NULL);
62 }
63
64 /*
65 * amdgpu_map_static_csa should be called during amdgpu_vm_init
66 * it maps virtual address amdgpu_csa_vaddr() to this VM, and each command
67 * submission of GFX should use this virtual address within META_DATA init
68 * package to support SRIOV gfx preemption.
69 */
amdgpu_map_static_csa(struct amdgpu_device * adev,struct amdgpu_vm * vm,struct amdgpu_bo * bo,struct amdgpu_bo_va ** bo_va,uint64_t csa_addr,uint32_t size)70 int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm,
71 struct amdgpu_bo *bo, struct amdgpu_bo_va **bo_va,
72 uint64_t csa_addr, uint32_t size)
73 {
74 struct ww_acquire_ctx ticket;
75 struct list_head list;
76 struct amdgpu_bo_list_entry pd;
77 struct ttm_validate_buffer csa_tv;
78 int r;
79
80 INIT_LIST_HEAD(&list);
81 INIT_LIST_HEAD(&csa_tv.head);
82 csa_tv.bo = &bo->tbo;
83 csa_tv.num_shared = 1;
84
85 list_add(&csa_tv.head, &list);
86 amdgpu_vm_get_pd_bo(vm, &list, &pd);
87
88 r = ttm_eu_reserve_buffers(&ticket, &list, true, NULL);
89 if (r) {
90 DRM_ERROR("failed to reserve CSA,PD BOs: err=%d\n", r);
91 return r;
92 }
93
94 *bo_va = amdgpu_vm_bo_add(adev, vm, bo);
95 if (!*bo_va) {
96 ttm_eu_backoff_reservation(&ticket, &list);
97 DRM_ERROR("failed to create bo_va for static CSA\n");
98 return -ENOMEM;
99 }
100
101 r = amdgpu_vm_bo_map(adev, *bo_va, csa_addr, 0, size,
102 AMDGPU_PTE_READABLE | AMDGPU_PTE_WRITEABLE |
103 AMDGPU_PTE_EXECUTABLE);
104
105 if (r) {
106 DRM_ERROR("failed to do bo_map on static CSA, err=%d\n", r);
107 amdgpu_vm_bo_rmv(adev, *bo_va);
108 ttm_eu_backoff_reservation(&ticket, &list);
109 return r;
110 }
111
112 ttm_eu_backoff_reservation(&ticket, &list);
113 return 0;
114 }
115