1 /*
2 * Copyright 2019 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
23 #include "amdgpu_vm.h"
24 #include "amdgpu_object.h"
25 #include "amdgpu_trace.h"
26
27 /**
28 * amdgpu_vm_cpu_map_table - make sure new PDs/PTs are kmapped
29 *
30 * @table: newly allocated or validated PD/PT
31 */
32 static int amdgpu_vm_cpu_map_table(struct amdgpu_bo *table)
33 {
34 return amdgpu_bo_kmap(table, NULL);
35 }
36
37 /**
38 * amdgpu_vm_cpu_prepare - prepare page table update with the CPU
39 *
40 * @p: see amdgpu_vm_update_params definition
41 * @owner: owner we need to sync to
42 * @exclusive: exclusive move fence we need to sync to
43 *
44 * Returns:
45 * Negativ errno, 0 for success.
46 */
47 static int amdgpu_vm_cpu_prepare(struct amdgpu_vm_update_params *p, void *owner,
48 struct dma_fence *exclusive)
49 {
50 int r;
51
52 /* Wait for PT BOs to be idle. PTs share the same resv. object
53 * as the root PD BO
54 */
55 r = amdgpu_bo_sync_wait(p->vm->root.base.bo, owner, true);
56 if (unlikely(r))
57 return r;
58
59 /* Wait for any BO move to be completed */
60 if (exclusive) {
61 r = dma_fence_wait(exclusive, true);
62 if (unlikely(r))
63 return r;
64 }
65
66 return 0;
67 }
68
69 /**
70 * amdgpu_vm_cpu_update - helper to update page tables via CPU
71 *
72 * @p: see amdgpu_vm_update_params definition
73 * @bo: PD/PT to update
74 * @pe: kmap addr of the page entry
75 * @addr: dst addr to write into pe
76 * @count: number of page entries to update
77 * @incr: increase next addr by incr bytes
78 * @flags: hw access flags
79 *
80 * Write count number of PT/PD entries directly.
81 */
82 static int amdgpu_vm_cpu_update(struct amdgpu_vm_update_params *p,
83 struct amdgpu_bo *bo, uint64_t pe,
84 uint64_t addr, unsigned count, uint32_t incr,
85 uint64_t flags)
86 {
87 unsigned int i;
88 uint64_t value;
89
90 pe += (unsigned long)amdgpu_bo_kptr(bo);
91
92 trace_amdgpu_vm_set_ptes(pe, addr, count, incr, flags);
93
94 for (i = 0; i < count; i++) {
95 value = p->pages_addr ?
96 amdgpu_vm_map_gart(p->pages_addr, addr) :
97 addr;
98 amdgpu_gmc_set_pte_pde(p->adev, (void *)(uintptr_t)pe,
99 i, value, flags);
100 addr += incr;
101 }
102 return 0;
103 }
104
105 /**
106 * amdgpu_vm_cpu_commit - commit page table update to the HW
107 *
108 * @p: see amdgpu_vm_update_params definition
109 * @fence: unused
110 *
111 * Make sure that the hardware sees the page table updates.
112 */
113 static int amdgpu_vm_cpu_commit(struct amdgpu_vm_update_params *p,
114 struct dma_fence **fence)
115 {
116 /* Flush HDP */
117 mb();
118 amdgpu_asic_flush_hdp(p->adev, NULL);
119 return 0;
120 }
121
122 const struct amdgpu_vm_update_funcs amdgpu_vm_cpu_funcs = {
123 .map_table = amdgpu_vm_cpu_map_table,
124 .prepare = amdgpu_vm_cpu_prepare,
125 .update = amdgpu_vm_cpu_update,
126 .commit = amdgpu_vm_cpu_commit
127 };