// SPDX-License-Identifier: MIT /* * Copyright © 2023 Intel Corporation */ #include <linux/hwmon-sysfs.h> #include <linux/hwmon.h> #include <linux/types.h> #include <drm/drm_managed.h> #include "regs/xe_gt_regs.h" #include "regs/xe_mchbar_regs.h" #include "regs/xe_pcode_regs.h" #include "xe_device.h" #include "xe_gt.h" #include "xe_hwmon.h" #include "xe_mmio.h" #include "xe_pcode.h" #include "xe_pcode_api.h" #include "xe_sriov.h" #include "xe_pm.h" enum xe_hwmon_reg { … }; enum xe_hwmon_reg_operation { … }; enum xe_hwmon_channel { … }; /* * SF_* - scale factors for particular quantities according to hwmon spec. */ #define SF_POWER … #define SF_CURR … #define SF_VOLTAGE … #define SF_ENERGY … #define SF_TIME … /** * struct xe_hwmon_energy_info - to accumulate energy */ struct xe_hwmon_energy_info { … }; /** * struct xe_hwmon - xe hwmon data structure */ struct xe_hwmon { … }; static struct xe_reg xe_hwmon_get_reg(struct xe_hwmon *hwmon, enum xe_hwmon_reg hwmon_reg, int channel) { … } #define PL1_DISABLE … /* * HW allows arbitrary PL1 limits to be set but silently clamps these values to * "typical but not guaranteed" min/max values in REG_PKG_POWER_SKU. Follow the * same pattern for sysfs, allow arbitrary PL1 limits to be set but display * clamped values when read. */ static void xe_hwmon_power_max_read(struct xe_hwmon *hwmon, int channel, long *value) { … } static int xe_hwmon_power_max_write(struct xe_hwmon *hwmon, int channel, long value) { … } static void xe_hwmon_power_rated_max_read(struct xe_hwmon *hwmon, int channel, long *value) { … } /* * xe_hwmon_energy_get - Obtain energy value * * The underlying energy hardware register is 32-bits and is subject to * overflow. How long before overflow? For example, with an example * scaling bit shift of 14 bits (see register *PACKAGE_POWER_SKU_UNIT) and * a power draw of 1000 watts, the 32-bit counter will overflow in * approximately 4.36 minutes. * * Examples: * 1 watt: (2^32 >> 14) / 1 W / (60 * 60 * 24) secs/day -> 3 days * 1000 watts: (2^32 >> 14) / 1000 W / 60 secs/min -> 4.36 minutes * * The function significantly increases overflow duration (from 4.36 * minutes) by accumulating the energy register into a 'long' as allowed by * the hwmon API. Using x86_64 128 bit arithmetic (see mul_u64_u32_shr()), * a 'long' of 63 bits, SF_ENERGY of 1e6 (~20 bits) and * hwmon->scl_shift_energy of 14 bits we have 57 (63 - 20 + 14) bits before * energyN_input overflows. This at 1000 W is an overflow duration of 278 years. */ static void xe_hwmon_energy_get(struct xe_hwmon *hwmon, int channel, long *energy) { … } static ssize_t xe_hwmon_power_max_interval_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t xe_hwmon_power_max_interval_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static SENSOR_DEVICE_ATTR(power1_max_interval, 0664, xe_hwmon_power_max_interval_show, xe_hwmon_power_max_interval_store, CHANNEL_CARD); static SENSOR_DEVICE_ATTR(power2_max_interval, 0664, xe_hwmon_power_max_interval_show, xe_hwmon_power_max_interval_store, CHANNEL_PKG); static struct attribute *hwmon_attributes[] = …; static umode_t xe_hwmon_attributes_visible(struct kobject *kobj, struct attribute *attr, int index) { … } static const struct attribute_group hwmon_attrgroup = …; static const struct attribute_group *hwmon_groups[] = …; static const struct hwmon_channel_info * const hwmon_info[] = …; /* I1 is exposed as power_crit or as curr_crit depending on bit 31 */ static int xe_hwmon_pcode_read_i1(struct xe_gt *gt, u32 *uval) { … } static int xe_hwmon_pcode_write_i1(struct xe_gt *gt, u32 uval) { … } static int xe_hwmon_power_curr_crit_read(struct xe_hwmon *hwmon, int channel, long *value, u32 scale_factor) { … } static int xe_hwmon_power_curr_crit_write(struct xe_hwmon *hwmon, int channel, long value, u32 scale_factor) { … } static void xe_hwmon_get_voltage(struct xe_hwmon *hwmon, int channel, long *value) { … } static umode_t xe_hwmon_power_is_visible(struct xe_hwmon *hwmon, u32 attr, int channel) { … } static int xe_hwmon_power_read(struct xe_hwmon *hwmon, u32 attr, int channel, long *val) { … } static int xe_hwmon_power_write(struct xe_hwmon *hwmon, u32 attr, int channel, long val) { … } static umode_t xe_hwmon_curr_is_visible(const struct xe_hwmon *hwmon, u32 attr, int channel) { … } static int xe_hwmon_curr_read(struct xe_hwmon *hwmon, u32 attr, int channel, long *val) { … } static int xe_hwmon_curr_write(struct xe_hwmon *hwmon, u32 attr, int channel, long val) { … } static umode_t xe_hwmon_in_is_visible(struct xe_hwmon *hwmon, u32 attr, int channel) { … } static int xe_hwmon_in_read(struct xe_hwmon *hwmon, u32 attr, int channel, long *val) { … } static umode_t xe_hwmon_energy_is_visible(struct xe_hwmon *hwmon, u32 attr, int channel) { … } static int xe_hwmon_energy_read(struct xe_hwmon *hwmon, u32 attr, int channel, long *val) { … } static umode_t xe_hwmon_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr, int channel) { … } static int xe_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { … } static int xe_hwmon_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) { … } static int xe_hwmon_read_label(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, const char **str) { … } static const struct hwmon_ops hwmon_ops = …; static const struct hwmon_chip_info hwmon_chip_info = …; static void xe_hwmon_get_preregistration_info(struct xe_device *xe) { … } static void xe_hwmon_mutex_destroy(void *arg) { … } void xe_hwmon_register(struct xe_device *xe) { … }
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