drivers/gpu/drm/i915/selftests/igt_atomic.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/i915/selftests/igt_atomic.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/i915/selftests/igt_atomic.c
Extension
.c
Size
750 bytes
Lines
48
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: MIT
/*
 * Copyright © 2018 Intel Corporation
 */

#include <linux/preempt.h>
#include <linux/bottom_half.h>
#include <linux/irqflags.h>

#include "igt_atomic.h"

static void __preempt_begin(void)
{
	preempt_disable();
}

static void __preempt_end(void)
{
	preempt_enable();
}

static void __softirq_begin(void)
{
	local_bh_disable();
}

static void __softirq_end(void)
{
	local_bh_enable();
}

static void __hardirq_begin(void)
{
	local_irq_disable();
}

static void __hardirq_end(void)
{
	local_irq_enable();
}

const struct igt_atomic_section igt_atomic_phases[] = {
	{ "preempt", __preempt_begin, __preempt_end },
	{ "softirq", __softirq_begin, __softirq_end },
	{ "hardirq", __hardirq_begin, __hardirq_end },
	{ }
};

Annotation

Implementation Notes