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https://github.com/skyline-emu/skyline.git
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3f7373209a
We decided to restructure Skyline to draw a layer of separation between guest and host GPU. We're reserving the `gpu` namespace and directory for purely host GPU and creating a new `soc` directory and namespace for emulation of parts of the X1 SoC which is currently limited to guest GPU but will be expanded to contain components like the audio DSP down the line.
70 lines
2.9 KiB
C++
70 lines
2.9 KiB
C++
// SPDX-License-Identifier: MPL-2.0
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// Copyright © 2020 Skyline Team and Contributors (https://github.com/skyline-emu/)
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#pragma once
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#include <soc/host1x.h>
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namespace skyline::service::nvdrv {
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/**
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* @brief NvHostSyncpoint handles allocating and accessing host1x syncpoints, these are cached versions of the HW syncpoints which are intermittently synced
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* @note Refer to Chapter 14 of the Tegra X1 TRM for an exhaustive overview of them
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* @url https://http.download.nvidia.com/tegra-public-appnotes/host1x.html
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* @url https://github.com/Jetson-TX1-AndroidTV/android_kernel_jetson_tx1_hdmi_primary/blob/jetson-tx1/drivers/video/tegra/host/nvhost_syncpt.c
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*/
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class NvHostSyncpoint {
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private:
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struct SyncpointInfo {
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std::atomic<u32> counterMin; //!< The least value the syncpoint can be (The value it was when it was last synchronized with host1x)
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std::atomic<u32> counterMax; //!< The maximum value the syncpoint can reach according to the current usage
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bool interfaceManaged; //!< If the syncpoint is managed by a host1x client interface, a client interface is a HW block that can handle host1x transactions on behalf of a host1x client (Which would otherwise need to be manually synced using PIO which is synchronous and requires direct cooperation of the CPU)
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bool reserved; //!< If the syncpoint is reserved or not, not to be confused with a reserved value
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};
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const DeviceState &state;
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std::array<SyncpointInfo, soc::host1x::SyncpointCount> syncpoints{};
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std::mutex reservationLock;
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/**
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* @note reservationLock should be locked when calling this
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*/
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u32 ReserveSyncpoint(u32 id, bool clientManaged);
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/**
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* @return The ID of the first free syncpoint
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*/
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u32 FindFreeSyncpoint();
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public:
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NvHostSyncpoint(const DeviceState &state);
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/**
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* @brief Finds a free syncpoint and reserves it
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* @return The ID of the reserved syncpoint
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*/
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u32 AllocateSyncpoint(bool clientManaged);
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/**
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* @url https://github.com/Jetson-TX1-AndroidTV/android_kernel_jetson_tx1_hdmi_primary/blob/8f74a72394efb871cb3f886a3de2998cd7ff2990/drivers/gpu/host1x/syncpt.c#L259
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*/
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bool HasSyncpointExpired(u32 id, u32 threshold);
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/**
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* @brief Atomically increments the maximum value of a syncpoint by the given amount
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* @return The new max value of the syncpoint
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*/
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u32 IncrementSyncpointMaxExt(u32 id, u32 amount);
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/**
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* @return The minimum value of the syncpoint
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*/
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u32 ReadSyncpointMinValue(u32 id);
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/**
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* @brief Synchronises the minimum value of the syncpoint to with the GPU
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* @return The new minimum value of the syncpoint
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*/
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u32 UpdateMin(u32 id);
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};
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}
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