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video_core: dma_pusher: Add support for prefetched command lists.

This commit is contained in:
bunnei 2020-10-29 21:13:04 -07:00
parent 1d4cbb92f2
commit c64545d07a
2 changed files with 52 additions and 25 deletions
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56
src/video_core/dma_pusher.cpp
View File

@ -45,32 +45,42 @@ bool DmaPusher::Step() {
return false;
}
const CommandList& command_list{dma_pushbuffer.front()};
ASSERT_OR_EXECUTE(!command_list.empty(), {
// Somehow the command_list is empty, in order to avoid a crash
// We ignore it and assume its size is 0.
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
command_headers = std::move(command_list.prefetch_command_list);
dma_pushbuffer.pop();
dma_pushbuffer_subindex = 0;
return true;
});
const CommandListHeader command_list_header{command_list[dma_pushbuffer_subindex++]};
const GPUVAddr dma_get = command_list_header.addr;
} else {
const CommandListHeader command_list_header{
command_list.command_lists[dma_pushbuffer_subindex]};
const u64 next_hash = command_list.command_list_hashes[dma_pushbuffer_subindex++];
const GPUVAddr dma_get = command_list_header.addr;
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 (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
command_headers.resize(command_list_header.size);
gpu.MemoryManager().ReadBlockUnsafe(dma_get, command_headers.data(),
command_list_header.size * sizeof(u32));
}
if (command_list_header.size == 0) {
return true;
}
// Push buffer non-empty, read a word
command_headers.resize(command_list_header.size);
gpu.MemoryManager().ReadBlockUnsafe(dma_get, command_headers.data(),
command_list_header.size * sizeof(u32));
for (std::size_t index = 0; index < command_headers.size();) {
const CommandHeader& command_header = command_headers[index];

21
src/video_core/dma_pusher.h
View File

@ -74,9 +74,26 @@ union CommandHeader {
static_assert(std::is_standard_layout_v<CommandHeader>, "CommandHeader is not standard layout");
static_assert(sizeof(CommandHeader) == sizeof(u32), "CommandHeader has incorrect size!");
static constexpr CommandHeader BuildCommandHeader(BufferMethods method, u32 arg_count,
SubmissionMode mode) {
CommandHeader result{};
result.method.Assign(static_cast<u32>(method));
result.arg_count.Assign(arg_count);
result.mode.Assign(mode);
return result;
}
class GPU;
using CommandList = std::vector<Tegra::CommandListHeader>;
struct CommandList final {
CommandList() = default;
explicit CommandList(std::size_t size) : command_lists(size) {}
explicit CommandList(std::vector<Tegra::CommandHeader>&& prefetch_command_list)
: prefetch_command_list{std::move(prefetch_command_list)} {}
std::vector<Tegra::CommandListHeader> command_lists;
std::vector<Tegra::CommandHeader> prefetch_command_list;
};
/**
* The DmaPusher class implements DMA submission to FIFOs, providing an area of memory that the
@ -85,7 +102,7 @@ using CommandList = std::vector<Tegra::CommandListHeader>;
* See https://envytools.readthedocs.io/en/latest/hw/fifo/dma-pusher.html#fifo-dma-pusher for
* details on this implementation.
*/
class DmaPusher {
class DmaPusher final {
public:
explicit DmaPusher(Core::System& system, GPU& gpu);
~DmaPusher();