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Merge pull request #2139 from degasus/dma_pusher

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video_core/dma_pusher: The full list of headers at once.
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bunnei 2019-02-24 04:15:49 -05:00 committed by GitHub
commit 90c780e6f3
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 33 additions and 27 deletions
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49
src/video_core/dma_pusher.cpp
View file

@ -33,18 +33,36 @@ void DmaPusher::DispatchCalls() {
}
bool DmaPusher::Step() {
if (dma_get != dma_put) {
if (!ib_enable || dma_pushbuffer.empty()) {
// pushbuffer empty and IB empty or nonexistent - nothing to do
return false;
}
const CommandList& command_list{dma_pushbuffer.front()};
const CommandListHeader& command_list_header{command_list[dma_pushbuffer_subindex++]};
GPUVAddr dma_get = command_list_header.addr;
GPUVAddr dma_put = dma_get + command_list_header.size * sizeof(u32);
bool non_main = command_list_header.is_non_main;
if (dma_pushbuffer_subindex >= command_list.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
const auto address = gpu.MemoryManager().GpuToCpuAddress(dma_get);
ASSERT_MSG(address, "Invalid GPU address");
const CommandHeader command_header{Memory::Read32(*address)};
command_headers.resize(command_list_header.size);
dma_get += sizeof(u32);
Memory::ReadBlock(*address, command_headers.data(), command_list_header.size * sizeof(u32));
if (!non_main) {
dma_mget = dma_get;
}
for (const CommandHeader& command_header : command_headers) {
// now, see if we're in the middle of a command
if (dma_state.length_pending) {
@ -91,22 +109,11 @@ bool DmaPusher::Step() {
break;
}
}
} else if (ib_enable && !dma_pushbuffer.empty()) {
// Current pushbuffer empty, but we have more IB entries to read
const CommandList& command_list{dma_pushbuffer.front()};
const CommandListHeader& command_list_header{command_list[dma_pushbuffer_subindex++]};
dma_get = command_list_header.addr;
dma_put = dma_get + command_list_header.size * sizeof(u32);
non_main = command_list_header.is_non_main;
if (dma_pushbuffer_subindex >= command_list.size()) {
// We've gone through the current list, remove it from the queue
dma_pushbuffer.pop();
dma_pushbuffer_subindex = 0;
}
} else {
// Otherwise, pushbuffer empty and IB empty or nonexistent - nothing to do
return {};
if (!non_main) {
// TODO (degasus): This is dead code, as dma_mget is never read.
dma_mget = dma_put;
}
return true;

5
src/video_core/dma_pusher.h
View file

@ -75,6 +75,8 @@ private:
GPU& gpu;
std::vector<CommandHeader> command_headers; ///< Buffer for list of commands fetched at once
std::queue<CommandList> dma_pushbuffer; ///< Queue of command lists to be processed
std::size_t dma_pushbuffer_subindex{}; ///< Index within a command list within the pushbuffer
@ -89,11 +91,8 @@ private:
DmaState dma_state{};
bool dma_increment_once{};
GPUVAddr dma_put{}; ///< pushbuffer current end address
GPUVAddr dma_get{}; ///< pushbuffer current read address
GPUVAddr dma_mget{}; ///< main pushbuffer last read address
bool ib_enable{true}; ///< IB mode enabled
bool non_main{}; ///< non-main pushbuffer active
};
} // namespace Tegra