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
|
// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "common/cityhash.h"
#include "common/microprofile.h"
#include "common/settings.h"
#include "core/core.h"
#include "core/memory.h"
#include "video_core/dma_pusher.h"
#include "video_core/engines/maxwell_3d.h"
#include "video_core/gpu.h"
#include "video_core/memory_manager.h"
namespace Tegra {
constexpr u32 MacroRegistersStart = 0xE00;
DmaPusher::DmaPusher(Core::System& system_, GPU& gpu_, MemoryManager& memory_manager_,
Control::ChannelState& channel_state_)
: gpu{gpu_}, system{system_}, memory_manager{memory_manager_}, puller{gpu_, memory_manager_,
*this, channel_state_} {}
DmaPusher::~DmaPusher() = default;
MICROPROFILE_DEFINE(DispatchCalls, "GPU", "Execute command buffer", MP_RGB(128, 128, 192));
void DmaPusher::DispatchCalls() {
MICROPROFILE_SCOPE(DispatchCalls);
dma_pushbuffer_subindex = 0;
dma_state.is_last_call = true;
while (system.IsPoweredOn()) {
if (!Step()) {
break;
}
}
gpu.FlushCommands();
gpu.OnCommandListEnd();
}
bool DmaPusher::Step() {
if (!ib_enable || dma_pushbuffer.empty()) {
// pushbuffer empty and IB empty or nonexistent - nothing to do
return false;
}
CommandList& command_list{dma_pushbuffer.front()};
ASSERT_OR_EXECUTE(
command_list.command_lists.size() || command_list.prefetch_command_list.size(), {
// Somehow the command_list is empty, in order to avoid a crash
// We ignore it and assume its size is 0.
dma_pushbuffer.pop();
dma_pushbuffer_subindex = 0;
return true;
});
if (command_list.prefetch_command_list.size()) {
// Prefetched command list from nvdrv, used for things like synchronization
ProcessCommands(command_list.prefetch_command_list);
dma_pushbuffer.pop();
} else {
const CommandListHeader command_list_header{
command_list.command_lists[dma_pushbuffer_subindex++]};
dma_state.dma_get = command_list_header.addr;
if (dma_pushbuffer_subindex >= command_list.command_lists.size()) {
// We've gone through the current list, remove it from the queue
dma_pushbuffer.pop();
dma_pushbuffer_subindex = 0;
}
if (command_list_header.size == 0) {
return true;
}
// Push buffer non-empty, read a word
if (dma_state.method >= MacroRegistersStart) {
if (subchannels[dma_state.subchannel]) {
subchannels[dma_state.subchannel]->current_dirty = memory_manager.IsMemoryDirty(
dma_state.dma_get, command_list_header.size * sizeof(u32));
}
}
Core::Memory::GpuGuestMemory<Tegra::CommandHeader,
Core::Memory::GuestMemoryFlags::UnsafeRead>
headers(memory_manager, dma_state.dma_get, command_list_header.size, &command_headers);
ProcessCommands(headers);
}
return true;
}
void DmaPusher::ProcessCommands(std::span<const CommandHeader> commands) {
for (std::size_t index = 0; index < commands.size();) {
const CommandHeader& command_header = commands[index];
if (dma_state.method_count) {
// Data word of methods command
dma_state.dma_word_offset = static_cast<u32>(index * sizeof(u32));
if (dma_state.non_incrementing) {
const u32 max_write = static_cast<u32>(
std::min<std::size_t>(index + dma_state.method_count, commands.size()) - index);
CallMultiMethod(&command_header.argument, max_write);
dma_state.method_count -= max_write;
dma_state.is_last_call = true;
index += max_write;
continue;
} else {
dma_state.is_last_call = dma_state.method_count <= 1;
CallMethod(command_header.argument);
}
if (!dma_state.non_incrementing) {
dma_state.method++;
}
if (dma_increment_once) {
dma_state.non_incrementing = true;
}
dma_state.method_count--;
} else {
// No command active - this is the first word of a new one
switch (command_header.mode) {
case SubmissionMode::Increasing:
SetState(command_header);
dma_state.non_incrementing = false;
dma_increment_once = false;
break;
case SubmissionMode::NonIncreasing:
SetState(command_header);
dma_state.non_incrementing = true;
dma_increment_once = false;
break;
case SubmissionMode::Inline:
dma_state.method = command_header.method;
dma_state.subchannel = command_header.subchannel;
dma_state.dma_word_offset = static_cast<u64>(
-static_cast<s64>(dma_state.dma_get)); // negate to set address as 0
CallMethod(command_header.arg_count);
dma_state.non_incrementing = true;
dma_increment_once = false;
break;
case SubmissionMode::IncreaseOnce:
SetState(command_header);
dma_state.non_incrementing = false;
dma_increment_once = true;
break;
default:
break;
}
}
index++;
}
}
void DmaPusher::SetState(const CommandHeader& command_header) {
dma_state.method = command_header.method;
dma_state.subchannel = command_header.subchannel;
dma_state.method_count = command_header.method_count;
}
void DmaPusher::CallMethod(u32 argument) const {
if (dma_state.method < non_puller_methods) {
puller.CallPullerMethod(Engines::Puller::MethodCall{
dma_state.method,
argument,
dma_state.subchannel,
dma_state.method_count,
});
} else {
auto subchannel = subchannels[dma_state.subchannel];
if (!subchannel->execution_mask[dma_state.method]) [[likely]] {
subchannel->method_sink.emplace_back(dma_state.method, argument);
return;
}
subchannel->ConsumeSink();
subchannel->current_dma_segment = dma_state.dma_get + dma_state.dma_word_offset;
subchannel->CallMethod(dma_state.method, argument, dma_state.is_last_call);
}
}
void DmaPusher::CallMultiMethod(const u32* base_start, u32 num_methods) const {
if (dma_state.method < non_puller_methods) {
puller.CallMultiMethod(dma_state.method, dma_state.subchannel, base_start, num_methods,
dma_state.method_count);
} else {
auto subchannel = subchannels[dma_state.subchannel];
subchannel->ConsumeSink();
subchannel->current_dma_segment = dma_state.dma_get + dma_state.dma_word_offset;
subchannel->CallMultiMethod(dma_state.method, base_start, num_methods,
dma_state.method_count);
}
}
void DmaPusher::BindRasterizer(VideoCore::RasterizerInterface* rasterizer) {
puller.BindRasterizer(rasterizer);
}
} // namespace Tegra
|
