Unverified Commit 719d8a59 authored by Karthik Poosa's avatar Karthik Poosa Committed by Rodrigo Vivi
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drm/xe/hwmon: Expose powerX_cap_interval 



Expose powerX_cap_interval to manage burst power limit time window.

Signed-off-by: default avatarKarthik Poosa <karthik.poosa@intel.com>
Reviewed-by: default avatarBadal Nilawar <badal.nilawar@intel.com>
Link: https://lore.kernel.org/r/20250529163458.2354509-5-karthik.poosa@intel.com


Signed-off-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
parent c713b9a2

Documentation/ABI/testing/sysfs-driver-intel-xe-hwmon

+18 −0
Original line number Diff line number Diff line
@@ -178,3 +178,21 @@ Description: RW. Package burst (PL2) power limit in microwatts. 
		compared to PL1.



		Only supported for particular Intel Xe graphics platforms.



What:		/sys/bus/pci/drivers/xe/.../hwmon/hwmon<i>/power1_cap_interval

Date:		May 2025

KernelVersion:	6.15

Contact:	intel-xe@lists.freedesktop.org

Description:	RW. Card burst power limit interval (Tau in PL2/Tau) in

		milliseconds over which sustained power is averaged.



		Only supported for particular Intel Xe graphics platforms.



What:		/sys/bus/pci/drivers/xe/.../hwmon/hwmon<i>/power2_cap_interval

Date:		May 2025

KernelVersion:	6.15

Contact:	intel-xe@lists.freedesktop.org

Description:	RW. Package burst power limit interval (Tau in PL2/Tau) in

		milliseconds over which sustained power is averaged.



		Only supported for particular Intel Xe graphics platforms.

drivers/gpu/drm/xe/xe_hwmon.c

+13 −3
Original line number Diff line number Diff line
@@ -474,7 +474,7 @@ xe_hwmon_power_max_interval_show(struct device *dev, struct device_attribute *at 
	u32 x, y, x_w = 2; /* 2 bits */

	u64 r, tau4, out;

	int channel = (to_sensor_dev_attr(attr)->index % 2) ? CHANNEL_PKG : CHANNEL_CARD;

	u32 power_attr = PL1_HWMON_ATTR;

	u32 power_attr = (to_sensor_dev_attr(attr)->index > 1) ? PL2_HWMON_ATTR : PL1_HWMON_ATTR;



	int ret = 0;
@@ -529,7 +529,7 @@ xe_hwmon_power_max_interval_store(struct device *dev, struct device_attribute *a 
	u64 tau4, r, max_win;

	unsigned long val;

	int channel = (to_sensor_dev_attr(attr)->index % 2) ? CHANNEL_PKG : CHANNEL_CARD;

	u32 power_attr = PL1_HWMON_ATTR;

	u32 power_attr = (to_sensor_dev_attr(attr)->index > 1) ? PL2_HWMON_ATTR : PL1_HWMON_ATTR;

	int ret;



	ret = kstrtoul(buf, 0, &val);
@@ -607,10 +607,20 @@ static SENSOR_DEVICE_ATTR(power1_max_interval, 0664, 
static SENSOR_DEVICE_ATTR(power2_max_interval, 0664,

			  xe_hwmon_power_max_interval_show,

			  xe_hwmon_power_max_interval_store, SENSOR_INDEX_PKG_PL1);

/* PSYS PL2 */

static SENSOR_DEVICE_ATTR(power1_cap_interval, 0664,

			  xe_hwmon_power_max_interval_show,

			  xe_hwmon_power_max_interval_store, SENSOR_INDEX_PSYS_PL2);

/* PKG PL2 */

static SENSOR_DEVICE_ATTR(power2_cap_interval, 0664,

			  xe_hwmon_power_max_interval_show,

			  xe_hwmon_power_max_interval_store, SENSOR_INDEX_PKG_PL2);



static struct attribute *hwmon_attributes[] = {

	&sensor_dev_attr_power1_max_interval.dev_attr.attr,

	&sensor_dev_attr_power2_max_interval.dev_attr.attr,

	&sensor_dev_attr_power1_cap_interval.dev_attr.attr,

	&sensor_dev_attr_power2_cap_interval.dev_attr.attr,

	NULL

};
@@ -621,7 +631,7 @@ static umode_t xe_hwmon_attributes_visible(struct kobject *kobj, 
	struct xe_hwmon *hwmon = dev_get_drvdata(dev);

	int ret = 0;

	int channel = (index % 2) ? CHANNEL_PKG : CHANNEL_CARD;

	u32 power_attr = PL1_HWMON_ATTR;

	u32 power_attr = (index > 1) ? PL2_HWMON_ATTR : PL1_HWMON_ATTR;

	u32 uval;



	xe_pm_runtime_get(hwmon->xe);