drm/amd/pm: add a new sysfs entry for default power limit

Driver doesn't keep the default bootup power limit and expose it
to user. As requested we add it in driver.
Signed-off-by: Eric Huang <jinhuieric.huang@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/include/kgd_pp_interface.h

@@ -288,7 +288,8 @@ struct amd_pm_funcs {
 				uint32_t block_type, bool gate);
 	int (*set_clockgating_by_smu)(void *handle, uint32_t msg_id);
 	int (*set_power_limit)(void *handle, uint32_t n);
-	int (*get_power_limit)(void *handle, uint32_t *limit, bool default_limit);
+	int (*get_power_limit)(void *handle, uint32_t *limit, uint32_t *max_limit,
+			bool default_limit);
 	int (*get_power_profile_mode)(void *handle, char *buf);
 	int (*set_power_profile_mode)(void *handle, long *input, uint32_t size);
 	int (*set_fine_grain_clk_vol)(void *handle, uint32_t type, long *input, uint32_t size);

drivers/gpu/drm/amd/pm/amdgpu_pm.c

@@ -2613,6 +2613,7 @@ static ssize_t amdgpu_hwmon_show_power_cap_max(struct device *dev,
 	const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
 	int limit_type = to_sensor_dev_attr(attr)->index;
 	uint32_t limit = limit_type << 24;
+	uint32_t max_limit = 0;
 	ssize_t size;
 	int r;
 
@@ -2629,8 +2630,9 @@ static ssize_t amdgpu_hwmon_show_power_cap_max(struct device *dev,
 		smu_get_power_limit(&adev->smu, &limit, SMU_PPT_LIMIT_MAX);
 		size = snprintf(buf, PAGE_SIZE, "%u\n", limit * 1000000);
 	} else if (pp_funcs && pp_funcs->get_power_limit) {
-		pp_funcs->get_power_limit(adev->powerplay.pp_handle, &limit, true);
-		size = snprintf(buf, PAGE_SIZE, "%u\n", limit * 1000000);
+		pp_funcs->get_power_limit(adev->powerplay.pp_handle,
+				&limit, &max_limit, true);
+		size = snprintf(buf, PAGE_SIZE, "%u\n", max_limit * 1000000);
 	} else {
 		size = snprintf(buf, PAGE_SIZE, "\n");
 	}
@@ -2665,7 +2667,8 @@ static ssize_t amdgpu_hwmon_show_power_cap(struct device *dev,
 		smu_get_power_limit(&adev->smu, &limit, SMU_PPT_LIMIT_CURRENT);
 		size = snprintf(buf, PAGE_SIZE, "%u\n", limit * 1000000);
 	} else if (pp_funcs && pp_funcs->get_power_limit) {
-		pp_funcs->get_power_limit(adev->powerplay.pp_handle, &limit, false);
+		pp_funcs->get_power_limit(adev->powerplay.pp_handle,
+				&limit, NULL, false);
 		size = snprintf(buf, PAGE_SIZE, "%u\n", limit * 1000000);
 	} else {
 		size = snprintf(buf, PAGE_SIZE, "\n");
@@ -2677,6 +2680,42 @@ static ssize_t amdgpu_hwmon_show_power_cap(struct device *dev,
 	return size;
 }
 
+static ssize_t amdgpu_hwmon_show_power_cap_default(struct device *dev,
+					 struct device_attribute *attr,
+					 char *buf)
+{
+	struct amdgpu_device *adev = dev_get_drvdata(dev);
+	const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
+	int limit_type = to_sensor_dev_attr(attr)->index;
+	uint32_t limit = limit_type << 24;
+	ssize_t size;
+	int r;
+
+	if (amdgpu_in_reset(adev))
+		return -EPERM;
+
+	r = pm_runtime_get_sync(adev_to_drm(adev)->dev);
+	if (r < 0) {
+		pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
+		return r;
+	}
+
+	if (is_support_sw_smu(adev)) {
+		smu_get_power_limit(&adev->smu, &limit, SMU_PPT_LIMIT_DEFAULT);
+		size = snprintf(buf, PAGE_SIZE, "%u\n", limit * 1000000);
+	} else if (pp_funcs && pp_funcs->get_power_limit) {
+		pp_funcs->get_power_limit(adev->powerplay.pp_handle,
+				&limit, NULL, true);
+		size = snprintf(buf, PAGE_SIZE, "%u\n", limit * 1000000);
+	} else {
+		size = snprintf(buf, PAGE_SIZE, "\n");
+	}
+
+	pm_runtime_mark_last_busy(adev_to_drm(adev)->dev);
+	pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
+
+	return size;
+}
 static ssize_t amdgpu_hwmon_show_power_label(struct device *dev,
 					 struct device_attribute *attr,
 					 char *buf)
@@ -2919,11 +2958,13 @@ static SENSOR_DEVICE_ATTR(power1_average, S_IRUGO, amdgpu_hwmon_show_power_avg,
 static SENSOR_DEVICE_ATTR(power1_cap_max, S_IRUGO, amdgpu_hwmon_show_power_cap_max, NULL, 0);
 static SENSOR_DEVICE_ATTR(power1_cap_min, S_IRUGO, amdgpu_hwmon_show_power_cap_min, NULL, 0);
 static SENSOR_DEVICE_ATTR(power1_cap, S_IRUGO | S_IWUSR, amdgpu_hwmon_show_power_cap, amdgpu_hwmon_set_power_cap, 0);
+static SENSOR_DEVICE_ATTR(power1_cap_default, S_IRUGO, amdgpu_hwmon_show_power_cap_default, NULL, 0);
 static SENSOR_DEVICE_ATTR(power1_label, S_IRUGO, amdgpu_hwmon_show_power_label, NULL, 0);
 static SENSOR_DEVICE_ATTR(power2_average, S_IRUGO, amdgpu_hwmon_show_power_avg, NULL, 1);
 static SENSOR_DEVICE_ATTR(power2_cap_max, S_IRUGO, amdgpu_hwmon_show_power_cap_max, NULL, 1);
 static SENSOR_DEVICE_ATTR(power2_cap_min, S_IRUGO, amdgpu_hwmon_show_power_cap_min, NULL, 1);
 static SENSOR_DEVICE_ATTR(power2_cap, S_IRUGO | S_IWUSR, amdgpu_hwmon_show_power_cap, amdgpu_hwmon_set_power_cap, 1);
+static SENSOR_DEVICE_ATTR(power2_cap_default, S_IRUGO, amdgpu_hwmon_show_power_cap_default, NULL, 1);
 static SENSOR_DEVICE_ATTR(power2_label, S_IRUGO, amdgpu_hwmon_show_power_label, NULL, 1);
 static SENSOR_DEVICE_ATTR(freq1_input, S_IRUGO, amdgpu_hwmon_show_sclk, NULL, 0);
 static SENSOR_DEVICE_ATTR(freq1_label, S_IRUGO, amdgpu_hwmon_show_sclk_label, NULL, 0);
@@ -2963,11 +3004,13 @@ static struct attribute *hwmon_attributes[] = {
 	&sensor_dev_attr_power1_cap_max.dev_attr.attr,
 	&sensor_dev_attr_power1_cap_min.dev_attr.attr,
 	&sensor_dev_attr_power1_cap.dev_attr.attr,
+	&sensor_dev_attr_power1_cap_default.dev_attr.attr,
 	&sensor_dev_attr_power1_label.dev_attr.attr,
 	&sensor_dev_attr_power2_average.dev_attr.attr,
 	&sensor_dev_attr_power2_cap_max.dev_attr.attr,
 	&sensor_dev_attr_power2_cap_min.dev_attr.attr,
 	&sensor_dev_attr_power2_cap.dev_attr.attr,
+	&sensor_dev_attr_power2_cap_default.dev_attr.attr,
 	&sensor_dev_attr_power2_label.dev_attr.attr,
 	&sensor_dev_attr_freq1_input.dev_attr.attr,
 	&sensor_dev_attr_freq1_label.dev_attr.attr,
@@ -3066,7 +3109,8 @@ static umode_t hwmon_attributes_visible(struct kobject *kobj,
 	      (adev->asic_type != CHIP_VANGOGH))) &&	/* not implemented yet */
 	    (attr == &sensor_dev_attr_power1_cap_max.dev_attr.attr ||
 	     attr == &sensor_dev_attr_power1_cap_min.dev_attr.attr||
-	     attr == &sensor_dev_attr_power1_cap.dev_attr.attr))
+	     attr == &sensor_dev_attr_power1_cap.dev_attr.attr ||
+	     attr == &sensor_dev_attr_power1_cap_default.dev_attr.attr))
 		return 0;
 
 	if (((adev->family == AMDGPU_FAMILY_SI) ||
@@ -3132,6 +3176,7 @@ static umode_t hwmon_attributes_visible(struct kobject *kobj,
 		 attr == &sensor_dev_attr_power2_cap_max.dev_attr.attr ||
 	     attr == &sensor_dev_attr_power2_cap_min.dev_attr.attr ||
 		 attr == &sensor_dev_attr_power2_cap.dev_attr.attr ||
+		 attr == &sensor_dev_attr_power2_cap_default.dev_attr.attr ||
 		 attr == &sensor_dev_attr_power2_label.dev_attr.attr ||
 		 attr == &sensor_dev_attr_power1_label.dev_attr.attr))
 		return 0;

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

@@ -171,6 +171,7 @@ enum smu_ppt_limit_level
 {
 	SMU_PPT_LIMIT_MIN = -1,
 	SMU_PPT_LIMIT_CURRENT,
+	SMU_PPT_LIMIT_DEFAULT,
 	SMU_PPT_LIMIT_MAX,
 };
 
@@ -446,6 +447,7 @@ struct smu_context
 
 	bool od_enabled;
 	uint32_t current_power_limit;
+	uint32_t default_power_limit;
 	uint32_t max_power_limit;
 
 	/* soft pptable */

drivers/gpu/drm/amd/pm/inc/smu_v11_0.h

@@ -141,6 +141,7 @@ struct smu_11_5_power_context {
 	enum smu_11_0_power_state power_state;
 
 	uint32_t	current_fast_ppt_limit;
+	uint32_t	default_fast_ppt_limit;
 	uint32_t	max_fast_ppt_limit;
 };
 

drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c

@@ -1034,7 +1034,8 @@ static int pp_set_power_limit(void *handle, uint32_t limit)
 	return 0;
 }
 
-static int pp_get_power_limit(void *handle, uint32_t *limit, bool default_limit)
+static int pp_get_power_limit(void *handle, uint32_t *limit,
+		uint32_t *max_limit, bool default_limit)
 {
 	struct pp_hwmgr *hwmgr = handle;
 
@@ -1045,9 +1046,12 @@ static int pp_get_power_limit(void *handle, uint32_t *limit, bool default_limit)
 
 	if (default_limit) {
 		*limit = hwmgr->default_power_limit;
+		if (max_limit) {
+			*max_limit = *limit;
 			if (hwmgr->od_enabled) {
-			*limit *= (100 + hwmgr->platform_descriptor.TDPODLimit);
-			*limit /= 100;
+				*max_limit *= (100 + hwmgr->platform_descriptor.TDPODLimit);
+				*max_limit /= 100;
+			}
 		}
 	}
 	else

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

@@ -2183,6 +2183,9 @@ int smu_get_power_limit(struct smu_context *smu,
 		case SMU_PPT_LIMIT_CURRENT:
 			*limit = smu->current_power_limit;
 			break;
+		case SMU_PPT_LIMIT_DEFAULT:
+			*limit = smu->default_power_limit;
+			break;
 		case SMU_PPT_LIMIT_MAX:
 			*limit = smu->max_power_limit;
 			break;

drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c

@@ -1129,7 +1129,7 @@ static int arcturus_get_power_limit(struct smu_context *smu)
 		power_limit =
 			pptable->SocketPowerLimitAc[PPT_THROTTLER_PPT0];
 	}
-	smu->current_power_limit = power_limit;
+	smu->current_power_limit = smu->default_power_limit = power_limit;
 
 	if (smu->od_enabled) {
 		od_percent = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_11_0_ODSETTING_POWERPERCENTAGE]);

drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c

@@ -2111,7 +2111,7 @@ static int navi10_get_power_limit(struct smu_context *smu)
 		power_limit =
 			pptable->SocketPowerLimitAc[PPT_THROTTLER_PPT0];
 	}
-	smu->current_power_limit = power_limit;
+	smu->current_power_limit = smu->default_power_limit = power_limit;
 
 	if (smu->od_enabled &&
 	    navi10_od_feature_is_supported(od_settings, SMU_11_0_ODCAP_POWER_LIMIT)) {

drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c

@@ -1736,7 +1736,7 @@ static int sienna_cichlid_get_power_limit(struct smu_context *smu)
 		power_limit =
 			pptable->SocketPowerLimitAc[PPT_THROTTLER_PPT0];
 	}
-	smu->current_power_limit = power_limit;
+	smu->current_power_limit = smu->default_power_limit = power_limit;
 
 	if (smu->od_enabled) {
 		od_percent = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_11_0_7_ODSETTING_POWERPERCENTAGE]);

drivers/gpu/drm/amd/pm/swsmu/smu11/vangogh_ppt.c

@@ -1756,7 +1756,7 @@ static int vangogh_get_power_limit(struct smu_context *smu)
 		return ret;
 	}
 	/* convert from milliwatt to watt */
-	smu->current_power_limit = ppt_limit / 1000;
+	smu->current_power_limit = smu->default_power_limit = ppt_limit / 1000;
 	smu->max_power_limit = 29;
 
 	ret = smu_cmn_send_smc_msg(smu, SMU_MSG_GetFastPPTLimit, &ppt_limit);
@@ -1765,7 +1765,8 @@ static int vangogh_get_power_limit(struct smu_context *smu)
 		return ret;
 	}
 	/* convert from milliwatt to watt */
-	power_context->current_fast_ppt_limit = ppt_limit / 1000;
+	power_context->current_fast_ppt_limit =
+			power_context->default_fast_ppt_limit = ppt_limit / 1000;
 	power_context->max_fast_ppt_limit = 30;
 
 	return ret;
@@ -1790,6 +1791,9 @@ static int vangogh_get_ppt_limit(struct smu_context *smu,
 		case SMU_PPT_LIMIT_CURRENT:
 			*ppt_limit = power_context->current_fast_ppt_limit;
 			break;
+		case SMU_PPT_LIMIT_DEFAULT:
+			*ppt_limit = power_context->default_fast_ppt_limit;
+			break;
 		default:
 			break;
 		}

drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c

@@ -1088,7 +1088,7 @@ static int aldebaran_get_power_limit(struct smu_context *smu)
 		power_limit = pptable->PptLimit;
 	}
 
-	smu->current_power_limit = power_limit;
+	smu->current_power_limit = smu->default_power_limit = power_limit;
 	if (pptable)
 		smu->max_power_limit = pptable->PptLimit;