As IO operations(access to SMU internals) and possible sleep are
involved in throttling logging. Workqueue can handle them well.
Otherwise we may hit "scheduling while atomic" error.
Change-Id: I454d593e965e54b13fdf04c112abb0a022204278
Signed-off-by: Evan Quan <evan.quan@xxxxxxx>
---
drivers/gpu/drm/amd/powerplay/amdgpu_smu.c | 10 ++++++++++
drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h | 2 ++
drivers/gpu/drm/amd/powerplay/smu_v11_0.c | 2 +-
3 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
index 342fd75b0806..e25a3b1ce7ac 100644
--- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
@@ -1053,6 +1053,14 @@ static int smu_smc_table_sw_fini(struct smu_context *smu)
return 0;
}
+static void smu_throttling_logging_work_fn(struct work_struct *work)
+{
+ struct smu_context *smu = container_of(work, struct smu_context,
+ throttling_logging_work);
+
+ smu_log_thermal_throttling(smu);
+}
+
static int smu_sw_init(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
@@ -1074,6 +1082,7 @@ static int smu_sw_init(void *handle)
spin_lock_init(&smu->metrics_lock);
spin_lock_init(&smu->message_lock);
+ INIT_WORK(&smu->throttling_logging_work, smu_throttling_logging_work_fn);
smu->watermarks_bitmap = 0;
smu->power_profile_mode = PP_SMC_POWER_PROFILE_BOOTUP_DEFAULT;
smu->default_power_profile_mode = PP_SMC_POWER_PROFILE_BOOTUP_DEFAULT;
@@ -1295,6 +1304,7 @@ static int smu_internal_hw_cleanup(struct smu_context *smu)
smu_i2c_eeprom_fini(smu, &adev->pm.smu_i2c);
+ cancel_work_sync(&smu->throttling_logging_work);
ret = smu_disable_thermal_alert(smu);
if (ret) {
pr_warn("Fail to stop thermal control!\n");
diff --git a/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h b/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
index 6f44ffb6eb51..b970b4d663b0 100644
--- a/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
+++ b/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
@@ -411,6 +411,8 @@ struct smu_context
bool uploading_custom_pp_table;
bool dc_controlled_by_gpio;
+
+ struct work_struct throttling_logging_work;
};
struct i2c_adapter;
diff --git a/drivers/gpu/drm/amd/powerplay/smu_v11_0.c b/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
index adde9eb7b283..69b1160d8ba2 100644
--- a/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
+++ b/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
@@ -1597,7 +1597,7 @@ static int smu_v11_0_irq_process(struct amdgpu_device *adev,
return 0;
if (__ratelimit(&adev->throttling_logging_rs))
- smu_log_thermal_throttling(smu);
+ schedule_work(&smu->throttling_logging_work);
break;
}
--
2.27.0
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