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// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef SRC_GRAPHICS_DISPLAY_DRIVERS_INTEL_I915_INTERRUPTS_H_
#define SRC_GRAPHICS_DISPLAY_DRIVERS_INTEL_I915_INTERRUPTS_H_
#include <fuchsia/hardware/intelgpucore/c/banjo.h>
#include <fuchsia/hardware/pci/cpp/banjo.h>
#include <lib/fit/function.h>
#include <lib/mmio/mmio.h>
#include <lib/zx/interrupt.h>
#include <threads.h>
#include <zircon/types.h>
#include <optional>
#include <fbl/macros.h>
#include "src/graphics/display/drivers/intel-i915/registers-ddi.h"
#include "src/graphics/display/drivers/intel-i915/registers-pipe.h"
namespace i915 {
class Interrupts {
public:
// Callbacks that are invoked on various interrupt types. All callbacks are run on the internal
// irq thread and implementations must guarantee their own thread-safety.
using PipeVsyncCallback = fit::function<void(registers::Pipe, zx_time_t)>;
using HotplugCallback = fit::function<void(registers::Ddi ddi, bool long_pulse)>;
Interrupts();
~Interrupts();
// The lifetimes of |dev|, |pci|, and |mmio_space| must outlast the initialized Interrupts
// instance.
zx_status_t Init(PipeVsyncCallback pipe_vsync_callback, HotplugCallback hotplug_callback,
zx_device_t* dev, const pci_protocol_t* pci, fdf::MmioBuffer* mmio_space,
cpp20::span<const registers::Ddi> ddis);
void FinishInit();
void Resume();
void Destroy();
// Initiate or stop vsync interrupt delivery from the given |pipe|. When enabled, interrupts will
// be notified on the internal irq thread via the PipeVsyncCallback that was provided in Init.
void EnablePipeVsync(registers::Pipe pipe, bool enable);
zx_status_t SetInterruptCallback(const intel_gpu_core_interrupt_t* callback,
uint32_t interrupt_mask);
private:
int IrqLoop();
void EnableHotplugInterrupts();
void HandlePipeInterrupt(registers::Pipe pipe, zx_time_t timestamp);
PipeVsyncCallback pipe_vsync_callback_;
HotplugCallback hotplug_callback_;
fdf::MmioBuffer* mmio_space_ = nullptr;
mtx_t lock_;
// Initialized by |Init|.
zx::interrupt irq_;
pci_interrupt_mode_t irq_mode_;
std::optional<thrd_t> irq_thread_; // Valid while irq_ is valid.
cpp20::span<const registers::Ddi> ddis_;
intel_gpu_core_interrupt_t interrupt_cb_ __TA_GUARDED(lock_) = {};
uint32_t interrupt_mask_ __TA_GUARDED(lock_) = 0;
DISALLOW_COPY_ASSIGN_AND_MOVE(Interrupts);
};
} // namespace i915
#endif // SRC_GRAPHICS_DISPLAY_DRIVERS_INTEL_I915_INTERRUPTS_H_