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

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To protect PMFW from being overloaded.

Signed-off-by: Evan Quan <quanliangl@hotmail.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Ma Jun <Jun.Ma2@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Evan Quan 2023-12-11 18:06:28 +08:00 committed by Alex Deucher
parent b8b39de646
commit 71f69557cb
2 changed files with 30 additions and 6 deletions
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29
drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
View File

@ -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)

7
drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
View File

@ -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;