diff options
| author | Evan Quan <quanliangl@hotmail.com> | 2023-12-11 18:06:28 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-12-13 15:23:50 -0500 |
| commit | 71f69557cb12a4674a05b4c5fb730880f13366b1 (patch) | |
| tree | b9ad7e9095ce766917cf06c175fbfc1361ff8638 /drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | |
| parent | b8b39de646274366d17a3614fdaf65fa0716ab32 (diff) | |
drm/amd/pm: add flood detection for wbrf events
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>
Diffstat (limited to 'drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c')
| -rw-r--r-- | drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c index a3c54a053bd5..d409857fd622 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c +++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c @@ -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; @@ -1420,6 +1421,20 @@ static int smu_wbrf_event_handler(struct notifier_block *nb, } /** + * 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 * * @smu: smu_context pointer @@ -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) |