// SPDX-License-Identifier: GPL-2.0
/*
 * preemptoff and irqoff tracepoints
 *
 * Copyright (C) Joel Fernandes (Google) <joel@joelfernandes.org>
 */

#include <linux/kallsyms.h>
#include <linux/uaccess.h>
#include <linux/module.h>
#include <linux/ftrace.h>
#include <mt-plat/mtk_sched_mon.h>
#include "trace.h"

#define CREATE_TRACE_POINTS
#include <trace/events/preemptirq.h>

#ifdef CONFIG_TRACE_IRQFLAGS
/* Per-cpu variable to prevent redundant calls when IRQs already off */
static DEFINE_PER_CPU(int, tracing_irq_cpu);

void trace_hardirqs_on(void)
{
	if (this_cpu_read(tracing_irq_cpu)) {
		if (!in_nmi())
			trace_irq_enable_rcuidle(CALLER_ADDR0, CALLER_ADDR1);
		tracer_hardirqs_on(CALLER_ADDR0, CALLER_ADDR1);
		trace_hardirqs_on_time();
		this_cpu_write(tracing_irq_cpu, 0);
	}

	lockdep_hardirqs_on(CALLER_ADDR0);
}
EXPORT_SYMBOL(trace_hardirqs_on);

void trace_hardirqs_off(void)
{
#ifdef CONFIG_MTK_IRQ_OFF_TRACER
	int trace_time = 0;
#endif
	if (!this_cpu_read(tracing_irq_cpu)) {
		this_cpu_write(tracing_irq_cpu, 1);
#ifdef CONFIG_MTK_IRQ_OFF_TRACER
		trace_time = 1;
#endif
		tracer_hardirqs_off(CALLER_ADDR0, CALLER_ADDR1);
		if (!in_nmi())
			trace_irq_disable_rcuidle(CALLER_ADDR0, CALLER_ADDR1);
	}

	lockdep_hardirqs_off(CALLER_ADDR0);
#ifdef CONFIG_MTK_IRQ_OFF_TRACER
	if (trace_time)
		trace_hardirqs_off_time();
#endif
}
EXPORT_SYMBOL(trace_hardirqs_off);

__visible void trace_hardirqs_on_caller(unsigned long caller_addr)
{
	if (this_cpu_read(tracing_irq_cpu)) {
		if (!in_nmi())
			trace_irq_enable_rcuidle(CALLER_ADDR0, caller_addr);
		tracer_hardirqs_on(CALLER_ADDR0, caller_addr);
		this_cpu_write(tracing_irq_cpu, 0);
	}

	lockdep_hardirqs_on(CALLER_ADDR0);
}
EXPORT_SYMBOL(trace_hardirqs_on_caller);

__visible void trace_hardirqs_off_caller(unsigned long caller_addr)
{
	lockdep_hardirqs_off(CALLER_ADDR0);

	if (!this_cpu_read(tracing_irq_cpu)) {
		this_cpu_write(tracing_irq_cpu, 1);
		tracer_hardirqs_off(CALLER_ADDR0, caller_addr);
		if (!in_nmi())
			trace_irq_disable_rcuidle(CALLER_ADDR0, caller_addr);
	}
}
EXPORT_SYMBOL(trace_hardirqs_off_caller);
#endif /* CONFIG_TRACE_IRQFLAGS */

#ifdef CONFIG_TRACE_PREEMPT_TOGGLE

void trace_preempt_on(unsigned long a0, unsigned long a1)
{
	if (!in_nmi())
		trace_preempt_enable_rcuidle(a0, a1);
	tracer_preempt_on(a0, a1);
	trace_preempt_on_time();
}

void trace_preempt_off(unsigned long a0, unsigned long a1)
{
	trace_preempt_off_time();
	if (!in_nmi())
		trace_preempt_disable_rcuidle(a0, a1);
	tracer_preempt_off(a0, a1);
}
#endif