1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/alignment.h"
#include "common/assert.h"
#include "common/logging/log.h"
#include "core/memory.h"
#include "video_core/memory_manager.h"
namespace Tegra {
MemoryManager::MemoryManager() {
// Mark the first page as reserved, so that 0 is not a valid GPUVAddr. Otherwise, games might
// try to use 0 as a valid address, which is also used to mean nullptr. This fixes a bug with
// Undertale using 0 for a render target.
PageSlot(0) = static_cast<u64>(PageStatus::Reserved);
}
GPUVAddr MemoryManager::AllocateSpace(u64 size, u64 align) {
const std::optional<GPUVAddr> gpu_addr{FindFreeBlock(0, size, align, PageStatus::Unmapped)};
ASSERT_MSG(gpu_addr, "unable to find available GPU memory");
for (u64 offset{}; offset < size; offset += PAGE_SIZE) {
VAddr& slot{PageSlot(*gpu_addr + offset)};
ASSERT(slot == static_cast<u64>(PageStatus::Unmapped));
slot = static_cast<u64>(PageStatus::Allocated);
}
return *gpu_addr;
}
GPUVAddr MemoryManager::AllocateSpace(GPUVAddr gpu_addr, u64 size, u64 align) {
for (u64 offset{}; offset < size; offset += PAGE_SIZE) {
VAddr& slot{PageSlot(gpu_addr + offset)};
ASSERT(slot == static_cast<u64>(PageStatus::Unmapped));
slot = static_cast<u64>(PageStatus::Allocated);
}
return gpu_addr;
}
GPUVAddr MemoryManager::MapBufferEx(VAddr cpu_addr, u64 size) {
const std::optional<GPUVAddr> gpu_addr{FindFreeBlock(0, size, PAGE_SIZE, PageStatus::Unmapped)};
ASSERT_MSG(gpu_addr, "unable to find available GPU memory");
for (u64 offset{}; offset < size; offset += PAGE_SIZE) {
VAddr& slot{PageSlot(*gpu_addr + offset)};
ASSERT(slot == static_cast<u64>(PageStatus::Unmapped));
slot = cpu_addr + offset;
}
const MappedRegion region{cpu_addr, *gpu_addr, size};
mapped_regions.push_back(region);
return *gpu_addr;
}
GPUVAddr MemoryManager::MapBufferEx(VAddr cpu_addr, GPUVAddr gpu_addr, u64 size) {
ASSERT((gpu_addr & PAGE_MASK) == 0);
if (PageSlot(gpu_addr) != static_cast<u64>(PageStatus::Allocated)) {
// Page has been already mapped. In this case, we must find a new area of memory to use that
// is different than the specified one. Super Mario Odyssey hits this scenario when changing
// areas, but we do not want to overwrite the old pages.
// TODO(bunnei): We need to write a hardware test to confirm this behavior.
LOG_ERROR(HW_GPU, "attempting to map addr 0x{:016X}, which is not available!", gpu_addr);
const std::optional<GPUVAddr> new_gpu_addr{
FindFreeBlock(gpu_addr, size, PAGE_SIZE, PageStatus::Allocated)};
ASSERT_MSG(new_gpu_addr, "unable to find available GPU memory");
gpu_addr = *new_gpu_addr;
}
for (u64 offset{}; offset < size; offset += PAGE_SIZE) {
VAddr& slot{PageSlot(gpu_addr + offset)};
ASSERT(slot == static_cast<u64>(PageStatus::Allocated));
slot = cpu_addr + offset;
}
const MappedRegion region{cpu_addr, gpu_addr, size};
mapped_regions.push_back(region);
return gpu_addr;
}
GPUVAddr MemoryManager::UnmapBuffer(GPUVAddr gpu_addr, u64 size) {
ASSERT((gpu_addr & PAGE_MASK) == 0);
for (u64 offset{}; offset < size; offset += PAGE_SIZE) {
VAddr& slot{PageSlot(gpu_addr + offset)};
ASSERT(slot != static_cast<u64>(PageStatus::Allocated) &&
slot != static_cast<u64>(PageStatus::Unmapped));
slot = static_cast<u64>(PageStatus::Unmapped);
}
// Delete the region mappings that are contained within the unmapped region
mapped_regions.erase(std::remove_if(mapped_regions.begin(), mapped_regions.end(),
[&](const MappedRegion& region) {
return region.gpu_addr <= gpu_addr &&
region.gpu_addr + region.size < gpu_addr + size;
}),
mapped_regions.end());
return gpu_addr;
}
GPUVAddr MemoryManager::GetRegionEnd(GPUVAddr region_start) const {
for (const auto& region : mapped_regions) {
const GPUVAddr region_end{region.gpu_addr + region.size};
if (region_start >= region.gpu_addr && region_start < region_end) {
return region_end;
}
}
return {};
}
std::optional<GPUVAddr> MemoryManager::FindFreeBlock(GPUVAddr region_start, u64 size, u64 align,
PageStatus status) {
GPUVAddr gpu_addr{region_start};
u64 free_space{};
align = (align + PAGE_MASK) & ~PAGE_MASK;
while (gpu_addr + free_space < MAX_ADDRESS) {
if (PageSlot(gpu_addr + free_space) == static_cast<u64>(status)) {
free_space += PAGE_SIZE;
if (free_space >= size) {
return gpu_addr;
}
} else {
gpu_addr += free_space + PAGE_SIZE;
free_space = 0;
gpu_addr = Common::AlignUp(gpu_addr, align);
}
}
return {};
}
std::optional<VAddr> MemoryManager::GpuToCpuAddress(GPUVAddr gpu_addr) {
const VAddr base_addr{PageSlot(gpu_addr)};
if (base_addr == static_cast<u64>(PageStatus::Allocated) ||
base_addr == static_cast<u64>(PageStatus::Unmapped) ||
base_addr == static_cast<u64>(PageStatus::Reserved)) {
return {};
}
return base_addr + (gpu_addr & PAGE_MASK);
}
u8 MemoryManager::Read8(GPUVAddr addr) {
return Memory::Read8(*GpuToCpuAddress(addr));
}
u16 MemoryManager::Read16(GPUVAddr addr) {
return Memory::Read16(*GpuToCpuAddress(addr));
}
u32 MemoryManager::Read32(GPUVAddr addr) {
return Memory::Read32(*GpuToCpuAddress(addr));
}
u64 MemoryManager::Read64(GPUVAddr addr) {
return Memory::Read64(*GpuToCpuAddress(addr));
}
void MemoryManager::Write8(GPUVAddr addr, u8 data) {
Memory::Write8(*GpuToCpuAddress(addr), data);
}
void MemoryManager::Write16(GPUVAddr addr, u16 data) {
Memory::Write16(*GpuToCpuAddress(addr), data);
}
void MemoryManager::Write32(GPUVAddr addr, u32 data) {
Memory::Write32(*GpuToCpuAddress(addr), data);
}
void MemoryManager::Write64(GPUVAddr addr, u64 data) {
Memory::Write64(*GpuToCpuAddress(addr), data);
}
u8* MemoryManager::GetPointer(GPUVAddr addr) {
return Memory::GetPointer(*GpuToCpuAddress(addr));
}
void MemoryManager::ReadBlock(GPUVAddr src_addr, void* dest_buffer, std::size_t size) {
std::memcpy(dest_buffer, GetPointer(src_addr), size);
}
void MemoryManager::WriteBlock(GPUVAddr dest_addr, const void* src_buffer, std::size_t size) {
std::memcpy(GetPointer(dest_addr), src_buffer, size);
}
void MemoryManager::CopyBlock(GPUVAddr dest_addr, GPUVAddr src_addr, std::size_t size) {
std::memcpy(GetPointer(dest_addr), GetPointer(src_addr), size);
}
VAddr& MemoryManager::PageSlot(GPUVAddr gpu_addr) {
auto& block{page_table[(gpu_addr >> (PAGE_BITS + PAGE_TABLE_BITS)) & PAGE_TABLE_MASK]};
if (!block) {
block = std::make_unique<PageBlock>();
block->fill(static_cast<VAddr>(PageStatus::Unmapped));
}
return (*block)[(gpu_addr >> PAGE_BITS) & PAGE_BLOCK_MASK];
}
} // namespace Tegra
|
