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 */
amdgpu_vm_cpu_map_table(struct amdgpu_bo_vm * table)32 static int amdgpu_vm_cpu_map_table(struct amdgpu_bo_vm *table)
33 {
34 table->bo.flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
35 return amdgpu_bo_kmap(&table->bo, NULL);
36 }
37
38 /**
39 * amdgpu_vm_cpu_prepare - prepare page table update with the CPU
40 *
41 * @p: see amdgpu_vm_update_params definition
42 * @sync: sync obj with fences to wait on
43 *
44 * Returns:
45 * Negativ errno, 0 for success.
46 */
amdgpu_vm_cpu_prepare(struct amdgpu_vm_update_params * p,struct amdgpu_sync * sync)47 static int amdgpu_vm_cpu_prepare(struct amdgpu_vm_update_params *p,
48 struct amdgpu_sync *sync)
49 {
50 if (!sync)
51 return 0;
52
53 return amdgpu_sync_wait(sync, true);
54 }
55
56 /**
57 * amdgpu_vm_cpu_update - helper to update page tables via CPU
58 *
59 * @p: see amdgpu_vm_update_params definition
60 * @vmbo: PD/PT to update
61 * @pe: byte offset of the PDE/PTE, relative to start of PDB/PTB
62 * @addr: dst addr to write into pe
63 * @count: number of page entries to update
64 * @incr: increase next addr by incr bytes
65 * @flags: hw access flags
66 *
67 * Write count number of PT/PD entries directly.
68 */
amdgpu_vm_cpu_update(struct amdgpu_vm_update_params * p,struct amdgpu_bo_vm * vmbo,uint64_t pe,uint64_t addr,unsigned count,uint32_t incr,uint64_t flags)69 static int amdgpu_vm_cpu_update(struct amdgpu_vm_update_params *p,
70 struct amdgpu_bo_vm *vmbo, uint64_t pe,
71 uint64_t addr, unsigned count, uint32_t incr,
72 uint64_t flags)
73 {
74 unsigned int i;
75 uint64_t value;
76 long r;
77
78 r = dma_resv_wait_timeout(vmbo->bo.tbo.base.resv, DMA_RESV_USAGE_KERNEL,
79 true, MAX_SCHEDULE_TIMEOUT);
80 if (r < 0)
81 return r;
82
83 pe += (unsigned long)amdgpu_bo_kptr(&vmbo->bo);
84
85 trace_amdgpu_vm_set_ptes(pe, addr, count, incr, flags, p->immediate);
86
87 for (i = 0; i < count; i++) {
88 value = p->pages_addr ?
89 amdgpu_vm_map_gart(p->pages_addr, addr) :
90 addr;
91 amdgpu_gmc_set_pte_pde(p->adev, (void *)(uintptr_t)pe,
92 i, value, flags);
93 addr += incr;
94 }
95 return 0;
96 }
97
98 /**
99 * amdgpu_vm_cpu_commit - commit page table update to the HW
100 *
101 * @p: see amdgpu_vm_update_params definition
102 * @fence: unused
103 *
104 * Make sure that the hardware sees the page table updates.
105 */
amdgpu_vm_cpu_commit(struct amdgpu_vm_update_params * p,struct dma_fence ** fence)106 static int amdgpu_vm_cpu_commit(struct amdgpu_vm_update_params *p,
107 struct dma_fence **fence)
108 {
109 if (p->needs_flush)
110 atomic64_inc(&p->vm->tlb_seq);
111
112 mb();
113 amdgpu_device_flush_hdp(p->adev, NULL);
114 return 0;
115 }
116
117 const struct amdgpu_vm_update_funcs amdgpu_vm_cpu_funcs = {
118 .map_table = amdgpu_vm_cpu_map_table,
119 .prepare = amdgpu_vm_cpu_prepare,
120 .update = amdgpu_vm_cpu_update,
121 .commit = amdgpu_vm_cpu_commit
122 };
123