drivers/gpu/drm/radeon/radeon_irq_kms.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/radeon/radeon_irq_kms.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/radeon/radeon_irq_kms.c
Extension
.c
Size
16685 bytes
Lines
606
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

if (!ret) {
			rdev->msi_enabled = 1;
			dev_info(rdev->dev, "radeon: using MSI.\n");
		}
	}

	INIT_DELAYED_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
	INIT_WORK(&rdev->dp_work, radeon_dp_work_func);
	INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);

	rdev->irq.installed = true;
	r = radeon_irq_install(rdev, rdev->pdev->irq);
	if (r) {
		rdev->irq.installed = false;
		flush_delayed_work(&rdev->hotplug_work);
		return r;
	}

	DRM_INFO("radeon: irq initialized.\n");
	return 0;
}

/**
 * radeon_irq_kms_fini - tear down driver interrupt info
 *
 * @rdev: radeon device pointer
 *
 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
 */
void radeon_irq_kms_fini(struct radeon_device *rdev)
{
	if (rdev->irq.installed) {
		radeon_irq_uninstall(rdev);
		rdev->irq.installed = false;
		if (rdev->msi_enabled)
			pci_disable_msi(rdev->pdev);
		flush_delayed_work(&rdev->hotplug_work);
	}
}

/**
 * radeon_irq_kms_sw_irq_get - enable software interrupt
 *
 * @rdev: radeon device pointer
 * @ring: ring whose interrupt you want to enable
 *
 * Enables the software interrupt for a specific ring (all asics).
 * The software interrupt is generally used to signal a fence on
 * a particular ring.
 */
void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
{
	unsigned long irqflags;

	if (!rdev->irq.installed)
		return;

	if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
		spin_lock_irqsave(&rdev->irq.lock, irqflags);
		radeon_irq_set(rdev);
		spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	}
}

/**
 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt
 *
 * @rdev: radeon device pointer
 * @ring: ring whose interrupt you want to enable
 *
 * Enables the software interrupt for a specific ring (all asics).
 * The software interrupt is generally used to signal a fence on
 * a particular ring.
 */
bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring)
{
	return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1;
}

/**
 * radeon_irq_kms_sw_irq_put - disable software interrupt
 *
 * @rdev: radeon device pointer
 * @ring: ring whose interrupt you want to disable
 *
 * Disables the software interrupt for a specific ring (all asics).
 * The software interrupt is generally used to signal a fence on
 * a particular ring.
 */
void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)

Annotation

Implementation Notes