Commit 71f69557 authored by Evan Quan's avatar Evan Quan Committed by Alex Deucher
Browse files

drm/amd/pm: add flood detection for wbrf events 



To protect PMFW from being overloaded.

Signed-off-by: default avatarEvan Quan <quanliangl@hotmail.com>
Reviewed-by: default avatarMario Limonciello <mario.limonciello@amd.com>
Signed-off-by: default avatarMa Jun <Jun.Ma2@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent b8b39de6

drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c

+23 −6
Original line number Diff line number Diff line
@@ -1410,7 +1410,8 @@ static int smu_wbrf_event_handler(struct notifier_block *nb, 


	switch (action) {

	case WBRF_CHANGED:

		smu_wbrf_handle_exclusion_ranges(smu);

		schedule_delayed_work(&smu->wbrf_delayed_work,

				      msecs_to_jiffies(SMU_WBRF_EVENT_HANDLING_PACE));

		break;

	default:

		return NOTIFY_DONE;
@@ -1419,6 +1420,20 @@ static int smu_wbrf_event_handler(struct notifier_block *nb, 
	return NOTIFY_OK;

}



/**

 * smu_wbrf_delayed_work_handler - callback on delayed work timer expired

 *

 * @work: struct work_struct pointer

 *

 * Flood is over and driver will consume the latest exclusion ranges.

 */

static void smu_wbrf_delayed_work_handler(struct work_struct *work)

{

	struct smu_context *smu = container_of(work, struct smu_context, wbrf_delayed_work.work);



	smu_wbrf_handle_exclusion_ranges(smu);

}



/**

 * smu_wbrf_support_check - check wbrf support

 *
@@ -1448,12 +1463,13 @@ static void smu_wbrf_support_check(struct smu_context *smu) 
 */

static int smu_wbrf_init(struct smu_context *smu)

{

	struct amdgpu_device *adev = smu->adev;

	int ret;



	if (!smu->wbrf_supported)

		return 0;



	INIT_DELAYED_WORK(&smu->wbrf_delayed_work, smu_wbrf_delayed_work_handler);



	smu->wbrf_notifier.notifier_call = smu_wbrf_event_handler;

	ret = amd_wbrf_register_notifier(&smu->wbrf_notifier);

	if (ret)
@@ -1464,11 +1480,10 @@ static int smu_wbrf_init(struct smu_context *smu) 
	 * before our driver loaded. To make sure our driver

	 * is awared of those exclusion ranges.

	 */

	ret = smu_wbrf_handle_exclusion_ranges(smu);

	if (ret)

		dev_err(adev->dev, "Failed to handle wbrf exclusion ranges\n");

	schedule_delayed_work(&smu->wbrf_delayed_work,

			      msecs_to_jiffies(SMU_WBRF_EVENT_HANDLING_PACE));



	return ret;

	return 0;

}



/**
@@ -1484,6 +1499,8 @@ static void smu_wbrf_fini(struct smu_context *smu) 
		return;



	amd_wbrf_unregister_notifier(&smu->wbrf_notifier);



	cancel_delayed_work_sync(&smu->wbrf_delayed_work);

}



static int smu_smc_hw_setup(struct smu_context *smu)

drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h

+7 −0
Original line number Diff line number Diff line
@@ -473,6 +473,12 @@ struct stb_context { 


#define WORKLOAD_POLICY_MAX 7



/*

 * Configure wbrf event handling pace as there can be only one

 * event processed every SMU_WBRF_EVENT_HANDLING_PACE ms.

 */

#define SMU_WBRF_EVENT_HANDLING_PACE	10



struct smu_context {

	struct amdgpu_device            *adev;

	struct amdgpu_irq_src		irq_source;
@@ -576,6 +582,7 @@ struct smu_context { 
	/* data structures for wbrf feature support */

	bool				wbrf_supported;

	struct notifier_block		wbrf_notifier;

	struct delayed_work		wbrf_delayed_work;

};



struct i2c_adapter;