diff options
Diffstat (limited to 'src/video_core/host1x/syncpoint_manager.cpp')
-rw-r--r-- | src/video_core/host1x/syncpoint_manager.cpp | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/src/video_core/host1x/syncpoint_manager.cpp b/src/video_core/host1x/syncpoint_manager.cpp new file mode 100644 index 000000000..a44fc83d3 --- /dev/null +++ b/src/video_core/host1x/syncpoint_manager.cpp @@ -0,0 +1,106 @@ +// SPDX-FileCopyrightText: 2021 yuzu Emulator Project +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "common/microprofile.h" +#include "video_core/host1x/syncpoint_manager.h" + +namespace Tegra { + +namespace Host1x { + +MICROPROFILE_DEFINE(GPU_wait, "GPU", "Wait for the GPU", MP_RGB(128, 128, 192)); + +SyncpointManager::ActionHandle SyncpointManager::RegisterAction( + std::atomic<u32>& syncpoint, std::list<RegisteredAction>& action_storage, u32 expected_value, + std::function<void()>&& action) { + if (syncpoint.load(std::memory_order_acquire) >= expected_value) { + action(); + return {}; + } + + std::unique_lock lk(guard); + if (syncpoint.load(std::memory_order_relaxed) >= expected_value) { + action(); + return {}; + } + auto it = action_storage.begin(); + while (it != action_storage.end()) { + if (it->expected_value >= expected_value) { + break; + } + ++it; + } + return action_storage.emplace(it, expected_value, std::move(action)); +} + +void SyncpointManager::DeregisterAction(std::list<RegisteredAction>& action_storage, + ActionHandle& handle) { + std::unique_lock lk(guard); + + // We want to ensure the iterator still exists prior to erasing it + // Otherwise, if an invalid iterator was passed in then it could lead to UB + // It is important to avoid UB in that case since the deregister isn't called from a locked + // context + for (auto it = action_storage.begin(); it != action_storage.end(); it++) { + if (it == handle) { + action_storage.erase(it); + return; + } + } +} + +void SyncpointManager::DeregisterGuestAction(u32 syncpoint_id, ActionHandle& handle) { + DeregisterAction(guest_action_storage[syncpoint_id], handle); +} + +void SyncpointManager::DeregisterHostAction(u32 syncpoint_id, ActionHandle& handle) { + DeregisterAction(host_action_storage[syncpoint_id], handle); +} + +void SyncpointManager::IncrementGuest(u32 syncpoint_id) { + Increment(syncpoints_guest[syncpoint_id], wait_guest_cv, guest_action_storage[syncpoint_id]); +} + +void SyncpointManager::IncrementHost(u32 syncpoint_id) { + Increment(syncpoints_host[syncpoint_id], wait_host_cv, host_action_storage[syncpoint_id]); +} + +void SyncpointManager::WaitGuest(u32 syncpoint_id, u32 expected_value) { + Wait(syncpoints_guest[syncpoint_id], wait_guest_cv, expected_value); +} + +void SyncpointManager::WaitHost(u32 syncpoint_id, u32 expected_value) { + MICROPROFILE_SCOPE(GPU_wait); + Wait(syncpoints_host[syncpoint_id], wait_host_cv, expected_value); +} + +void SyncpointManager::Increment(std::atomic<u32>& syncpoint, std::condition_variable& wait_cv, + std::list<RegisteredAction>& action_storage) { + auto new_value{syncpoint.fetch_add(1, std::memory_order_acq_rel) + 1}; + + std::unique_lock lk(guard); + auto it = action_storage.begin(); + while (it != action_storage.end()) { + if (it->expected_value > new_value) { + break; + } + it->action(); + it = action_storage.erase(it); + } + wait_cv.notify_all(); +} + +void SyncpointManager::Wait(std::atomic<u32>& syncpoint, std::condition_variable& wait_cv, + u32 expected_value) { + const auto pred = [&]() { return syncpoint.load(std::memory_order_acquire) >= expected_value; }; + if (pred()) { + return; + } + + std::unique_lock lk(guard); + wait_cv.wait(lk, pred); +} + +} // namespace Host1x + +} // namespace Tegra |