[PATCH v5 23/27] drm/amd/powerplay: Scope all PM queued work with drm_dev_enter/exit

[Andrey Grodzovsky]

To allow completion and further block of HW accesses post device PCI
remove.

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky at amd.com>
---
 drivers/gpu/drm/amd/pm/amdgpu_dpm.c       | 44 +++++++++++++----------
 drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 26 +++++++++++---
 2 files changed, 47 insertions(+), 23 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/amdgpu_dpm.c b/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
index 8fb12afe3c96..649e10d52d17 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
@@ -31,6 +31,7 @@
 #include "amdgpu_display.h"
 #include "hwmgr.h"
 #include <linux/power_supply.h>
+#include <drm/drm_drv.h>
 
 #define WIDTH_4K 3840
 
@@ -1316,29 +1317,36 @@ void amdgpu_dpm_thermal_work_handler(struct work_struct *work)
 	/* switch to the thermal state */
 	enum amd_pm_state_type dpm_state = POWER_STATE_TYPE_INTERNAL_THERMAL;
 	int temp, size = sizeof(temp);
+	int idx;
 
 	if (!adev->pm.dpm_enabled)
 		return;
 
-	if (!amdgpu_dpm_read_sensor(adev, AMDGPU_PP_SENSOR_GPU_TEMP,
-				    (void *)&temp, &size)) {
-		if (temp < adev->pm.dpm.thermal.min_temp)
-			/* switch back the user state */
-			dpm_state = adev->pm.dpm.user_state;
-	} else {
-		if (adev->pm.dpm.thermal.high_to_low)
-			/* switch back the user state */
-			dpm_state = adev->pm.dpm.user_state;
-	}
-	mutex_lock(&adev->pm.mutex);
-	if (dpm_state == POWER_STATE_TYPE_INTERNAL_THERMAL)
-		adev->pm.dpm.thermal_active = true;
-	else
-		adev->pm.dpm.thermal_active = false;
-	adev->pm.dpm.state = dpm_state;
-	mutex_unlock(&adev->pm.mutex);
+	if (drm_dev_enter(&adev->ddev, &idx)) {
 
-	amdgpu_pm_compute_clocks(adev);
+		if (!amdgpu_dpm_read_sensor(adev, AMDGPU_PP_SENSOR_GPU_TEMP,
+					    (void *)&temp, &size)) {
+			if (temp < adev->pm.dpm.thermal.min_temp)
+				/* switch back the user state */
+				dpm_state = adev->pm.dpm.user_state;
+		} else {
+			if (adev->pm.dpm.thermal.high_to_low)
+				/* switch back the user state */
+				dpm_state = adev->pm.dpm.user_state;
+		}
+		mutex_lock(&adev->pm.mutex);
+		if (dpm_state == POWER_STATE_TYPE_INTERNAL_THERMAL)
+			adev->pm.dpm.thermal_active = true;
+		else
+			adev->pm.dpm.thermal_active = false;
+		adev->pm.dpm.state = dpm_state;
+		mutex_unlock(&adev->pm.mutex);
+
+		amdgpu_pm_compute_clocks(adev);
+
+		drm_dev_exit(idx);
+
+	}
 }
 
 static struct amdgpu_ps *amdgpu_dpm_pick_power_state(struct amdgpu_device *adev,
diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
index d143ef1b460b..f034c8a5eb44 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -25,6 +25,8 @@
 #include <linux/firmware.h>
 #include <linux/pci.h>
 
+#include <drm/drm_drv.h>
+
 #include "amdgpu.h"
 #include "amdgpu_smu.h"
 #include "smu_internal.h"
@@ -904,21 +906,35 @@ static void smu_throttling_logging_work_fn(struct work_struct *work)
 {
 	struct smu_context *smu = container_of(work, struct smu_context,
 					       throttling_logging_work);
+	int idx;
+
+
+	if (drm_dev_enter(&smu->adev->ddev, &idx)) {
+
+		smu_log_thermal_throttling(smu);
 
-	smu_log_thermal_throttling(smu);
+		drm_dev_exit(idx);
+	}
 }
 
 static void smu_interrupt_work_fn(struct work_struct *work)
 {
 	struct smu_context *smu = container_of(work, struct smu_context,
 					       interrupt_work);
+	int idx;
 
-	mutex_lock(&smu->mutex);
+	if (drm_dev_enter(&smu->adev->ddev, &idx)) {
 
-	if (smu->ppt_funcs && smu->ppt_funcs->interrupt_work)
-		smu->ppt_funcs->interrupt_work(smu);
+		mutex_lock(&smu->mutex);
 
-	mutex_unlock(&smu->mutex);
+		if (smu->ppt_funcs && smu->ppt_funcs->interrupt_work)
+			smu->ppt_funcs->interrupt_work(smu);
+
+		mutex_unlock(&smu->mutex);
+
+		drm_dev_exit(idx);
+
+	}
 }
 
 static int smu_sw_init(void *handle)
-- 
2.25.1