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![Christophe JAILLET](/assets/img/avatar_default.png)
The first 'for' loop of asus_wmi_configure_sensor_setup() only computes the number and type of sensors that exist in the system. Here, the 'temp_sensor' structure is only used to store the data collected by asus_wmi_sensor_info(). There is no point in using a devm_ variant for this allocation. This wastes some memory for no good reason. Use the stack instead. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Link: https://lore.kernel.org/r/e23cea6c489fabb109a61e8a33d146a6b74c0529.1656741926.git.christophe.jaillet@wanadoo.fr Signed-off-by: Guenter Roeck <linux@roeck-us.net>
663 lines
15 KiB
C
663 lines
15 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* HWMON driver for ASUS motherboards that provides sensor readouts via WMI
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* interface present in the UEFI of the X370/X470/B450/X399 Ryzen motherboards.
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*
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* Copyright (C) 2018-2019 Ed Brindley <kernel@maidavale.org>
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*
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* WMI interface provides:
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* - CPU Core Voltage,
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* - CPU SOC Voltage,
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* - DRAM Voltage,
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* - VDDP Voltage,
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* - 1.8V PLL Voltage,
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* - +12V Voltage,
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* - +5V Voltage,
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* - 3VSB Voltage,
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* - VBAT Voltage,
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* - AVCC3 Voltage,
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* - SB 1.05V Voltage,
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* - CPU Core Voltage,
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* - CPU SOC Voltage,
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* - DRAM Voltage,
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* - CPU Fan RPM,
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* - Chassis Fan 1 RPM,
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* - Chassis Fan 2 RPM,
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* - Chassis Fan 3 RPM,
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* - HAMP Fan RPM,
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* - Water Pump RPM,
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* - CPU OPT RPM,
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* - Water Flow RPM,
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* - AIO Pump RPM,
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* - CPU Temperature,
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* - CPU Socket Temperature,
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* - Motherboard Temperature,
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* - Chipset Temperature,
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* - Tsensor 1 Temperature,
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* - CPU VRM Temperature,
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* - Water In,
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* - Water Out,
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* - CPU VRM Output Current.
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*/
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#include <linux/acpi.h>
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#include <linux/dmi.h>
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#include <linux/hwmon.h>
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#include <linux/init.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/units.h>
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#include <linux/wmi.h>
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#define ASUSWMI_MONITORING_GUID "466747A0-70EC-11DE-8A39-0800200C9A66"
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#define ASUSWMI_METHODID_GET_VALUE 0x52574543 /* RWEC */
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#define ASUSWMI_METHODID_UPDATE_BUFFER 0x51574543 /* QWEC */
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#define ASUSWMI_METHODID_GET_INFO 0x50574543 /* PWEC */
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#define ASUSWMI_METHODID_GET_NUMBER 0x50574572 /* PWEr */
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#define ASUSWMI_METHODID_GET_VERSION 0x50574574 /* PWEt */
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#define ASUS_WMI_MAX_STR_SIZE 32
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#define DMI_EXACT_MATCH_ASUS_BOARD_NAME(name) { \
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.matches = { \
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DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "ASUSTeK COMPUTER INC."), \
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DMI_EXACT_MATCH(DMI_BOARD_NAME, name), \
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}, \
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}
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static const struct dmi_system_id asus_wmi_dmi_table[] = {
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DMI_EXACT_MATCH_ASUS_BOARD_NAME("PRIME X399-A"),
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DMI_EXACT_MATCH_ASUS_BOARD_NAME("PRIME X470-PRO"),
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DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG CROSSHAIR VI EXTREME"),
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DMI_EXACT_MATCH_ASUS_BOARD_NAME("CROSSHAIR VI HERO"),
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DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG CROSSHAIR VI HERO (WI-FI AC)"),
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DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG CROSSHAIR VII HERO"),
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DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG CROSSHAIR VII HERO (WI-FI)"),
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DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX B450-E GAMING"),
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DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX B450-F GAMING"),
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DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX B450-F GAMING II"),
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DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX B450-I GAMING"),
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DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX X399-E GAMING"),
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DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX X470-F GAMING"),
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DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX X470-I GAMING"),
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DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG ZENITH EXTREME"),
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DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG ZENITH EXTREME ALPHA"),
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{}
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};
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MODULE_DEVICE_TABLE(dmi, asus_wmi_dmi_table);
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enum asus_wmi_sensor_class {
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VOLTAGE = 0x0,
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TEMPERATURE_C = 0x1,
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FAN_RPM = 0x2,
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CURRENT = 0x3,
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WATER_FLOW = 0x4,
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};
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enum asus_wmi_location {
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CPU = 0x0,
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CPU_SOC = 0x1,
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DRAM = 0x2,
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MOTHERBOARD = 0x3,
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CHIPSET = 0x4,
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AUX = 0x5,
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VRM = 0x6,
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COOLER = 0x7
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};
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enum asus_wmi_type {
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SIGNED_INT = 0x0,
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UNSIGNED_INT = 0x1,
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SCALED = 0x3,
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};
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enum asus_wmi_source {
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SIO = 0x1,
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EC = 0x2
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};
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static enum hwmon_sensor_types asus_data_types[] = {
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[VOLTAGE] = hwmon_in,
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[TEMPERATURE_C] = hwmon_temp,
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[FAN_RPM] = hwmon_fan,
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[CURRENT] = hwmon_curr,
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[WATER_FLOW] = hwmon_fan,
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};
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static u32 hwmon_attributes[hwmon_max] = {
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[hwmon_chip] = HWMON_C_REGISTER_TZ,
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[hwmon_temp] = HWMON_T_INPUT | HWMON_T_LABEL,
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[hwmon_in] = HWMON_I_INPUT | HWMON_I_LABEL,
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[hwmon_curr] = HWMON_C_INPUT | HWMON_C_LABEL,
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[hwmon_fan] = HWMON_F_INPUT | HWMON_F_LABEL,
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};
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/**
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* struct asus_wmi_sensor_info - sensor info.
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* @id: sensor id.
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* @data_type: sensor class e.g. voltage, temp etc.
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* @location: sensor location.
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* @name: sensor name.
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* @source: sensor source.
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* @type: sensor type signed, unsigned etc.
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* @cached_value: cached sensor value.
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*/
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struct asus_wmi_sensor_info {
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u32 id;
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int data_type;
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int location;
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char name[ASUS_WMI_MAX_STR_SIZE];
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int source;
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int type;
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long cached_value;
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};
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struct asus_wmi_wmi_info {
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unsigned long source_last_updated[3]; /* in jiffies */
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int sensor_count;
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const struct asus_wmi_sensor_info **info[hwmon_max];
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struct asus_wmi_sensor_info **info_by_id;
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};
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struct asus_wmi_sensors {
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struct asus_wmi_wmi_info wmi;
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/* lock access to internal cache */
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struct mutex lock;
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};
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/*
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* Universal method for calling WMI method
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*/
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static int asus_wmi_call_method(u32 method_id, u32 *args, struct acpi_buffer *output)
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{
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struct acpi_buffer input = {(acpi_size) sizeof(*args), args };
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acpi_status status;
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status = wmi_evaluate_method(ASUSWMI_MONITORING_GUID, 0,
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method_id, &input, output);
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if (ACPI_FAILURE(status))
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return -EIO;
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return 0;
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}
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/*
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* Gets the version of the ASUS sensors interface implemented
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*/
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static int asus_wmi_get_version(u32 *version)
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{
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struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
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u32 args[] = {0, 0, 0};
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union acpi_object *obj;
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int err;
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err = asus_wmi_call_method(ASUSWMI_METHODID_GET_VERSION, args, &output);
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if (err)
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return err;
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obj = output.pointer;
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if (!obj)
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return -EIO;
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if (obj->type != ACPI_TYPE_INTEGER) {
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err = -EIO;
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goto out_free_obj;
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}
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err = 0;
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*version = obj->integer.value;
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out_free_obj:
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ACPI_FREE(obj);
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return err;
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}
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/*
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* Gets the number of sensor items
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*/
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static int asus_wmi_get_item_count(u32 *count)
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{
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struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
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u32 args[] = {0, 0, 0};
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union acpi_object *obj;
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int err;
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err = asus_wmi_call_method(ASUSWMI_METHODID_GET_NUMBER, args, &output);
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if (err)
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return err;
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obj = output.pointer;
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if (!obj)
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return -EIO;
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if (obj->type != ACPI_TYPE_INTEGER) {
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err = -EIO;
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goto out_free_obj;
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}
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err = 0;
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*count = obj->integer.value;
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out_free_obj:
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ACPI_FREE(obj);
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return err;
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}
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static int asus_wmi_hwmon_add_chan_info(struct hwmon_channel_info *asus_wmi_hwmon_chan,
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struct device *dev, int num,
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enum hwmon_sensor_types type, u32 config)
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{
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u32 *cfg;
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cfg = devm_kcalloc(dev, num + 1, sizeof(*cfg), GFP_KERNEL);
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if (!cfg)
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return -ENOMEM;
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asus_wmi_hwmon_chan->type = type;
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asus_wmi_hwmon_chan->config = cfg;
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memset32(cfg, config, num);
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return 0;
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}
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/*
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* For a given sensor item returns details e.g. type (voltage/temperature/fan speed etc), bank etc
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*/
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static int asus_wmi_sensor_info(int index, struct asus_wmi_sensor_info *s)
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{
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union acpi_object name_obj, data_type_obj, location_obj, source_obj, type_obj;
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struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
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u32 args[] = {index, 0};
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union acpi_object *obj;
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int err;
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err = asus_wmi_call_method(ASUSWMI_METHODID_GET_INFO, args, &output);
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if (err)
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return err;
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s->id = index;
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obj = output.pointer;
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if (!obj)
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return -EIO;
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if (obj->type != ACPI_TYPE_PACKAGE) {
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err = -EIO;
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goto out_free_obj;
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}
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if (obj->package.count != 5) {
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err = -EIO;
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goto out_free_obj;
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}
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name_obj = obj->package.elements[0];
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if (name_obj.type != ACPI_TYPE_STRING) {
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err = -EIO;
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goto out_free_obj;
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}
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strncpy(s->name, name_obj.string.pointer, sizeof(s->name) - 1);
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data_type_obj = obj->package.elements[1];
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if (data_type_obj.type != ACPI_TYPE_INTEGER) {
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err = -EIO;
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goto out_free_obj;
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}
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s->data_type = data_type_obj.integer.value;
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location_obj = obj->package.elements[2];
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if (location_obj.type != ACPI_TYPE_INTEGER) {
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err = -EIO;
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goto out_free_obj;
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}
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s->location = location_obj.integer.value;
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source_obj = obj->package.elements[3];
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if (source_obj.type != ACPI_TYPE_INTEGER) {
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err = -EIO;
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goto out_free_obj;
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}
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s->source = source_obj.integer.value;
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type_obj = obj->package.elements[4];
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if (type_obj.type != ACPI_TYPE_INTEGER) {
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err = -EIO;
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goto out_free_obj;
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}
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err = 0;
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s->type = type_obj.integer.value;
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out_free_obj:
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ACPI_FREE(obj);
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return err;
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}
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static int asus_wmi_update_buffer(int source)
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{
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struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
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u32 args[] = {source, 0};
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return asus_wmi_call_method(ASUSWMI_METHODID_UPDATE_BUFFER, args, &output);
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}
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static int asus_wmi_get_sensor_value(u8 index, long *value)
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{
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struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
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u32 args[] = {index, 0};
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union acpi_object *obj;
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int err;
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err = asus_wmi_call_method(ASUSWMI_METHODID_GET_VALUE, args, &output);
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if (err)
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return err;
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obj = output.pointer;
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if (!obj)
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return -EIO;
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if (obj->type != ACPI_TYPE_INTEGER) {
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err = -EIO;
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goto out_free_obj;
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}
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err = 0;
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*value = obj->integer.value;
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out_free_obj:
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ACPI_FREE(obj);
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return err;
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}
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static int asus_wmi_update_values_for_source(u8 source, struct asus_wmi_sensors *sensor_data)
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{
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struct asus_wmi_sensor_info *sensor;
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long value = 0;
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int ret;
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int i;
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for (i = 0; i < sensor_data->wmi.sensor_count; i++) {
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sensor = sensor_data->wmi.info_by_id[i];
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if (sensor && sensor->source == source) {
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ret = asus_wmi_get_sensor_value(sensor->id, &value);
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if (ret)
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return ret;
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sensor->cached_value = value;
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}
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}
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return 0;
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}
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static int asus_wmi_scale_sensor_value(u32 value, int data_type)
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{
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/* FAN_RPM and WATER_FLOW don't need scaling */
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switch (data_type) {
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case VOLTAGE:
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/* value in microVolts */
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return DIV_ROUND_CLOSEST(value, KILO);
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case TEMPERATURE_C:
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/* value in Celsius */
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return value * MILLIDEGREE_PER_DEGREE;
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case CURRENT:
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/* value in Amperes */
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return value * MILLI;
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}
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return value;
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}
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static int asus_wmi_get_cached_value_or_update(const struct asus_wmi_sensor_info *sensor,
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struct asus_wmi_sensors *sensor_data,
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u32 *value)
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{
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int ret = 0;
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mutex_lock(&sensor_data->lock);
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if (time_after(jiffies, sensor_data->wmi.source_last_updated[sensor->source] + HZ)) {
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ret = asus_wmi_update_buffer(sensor->source);
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if (ret)
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goto unlock;
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ret = asus_wmi_update_values_for_source(sensor->source, sensor_data);
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if (ret)
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goto unlock;
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sensor_data->wmi.source_last_updated[sensor->source] = jiffies;
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}
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*value = sensor->cached_value;
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unlock:
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mutex_unlock(&sensor_data->lock);
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return ret;
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}
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/* Now follow the functions that implement the hwmon interface */
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static int asus_wmi_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, long *val)
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{
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const struct asus_wmi_sensor_info *sensor;
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u32 value = 0;
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int ret;
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struct asus_wmi_sensors *sensor_data = dev_get_drvdata(dev);
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sensor = *(sensor_data->wmi.info[type] + channel);
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ret = asus_wmi_get_cached_value_or_update(sensor, sensor_data, &value);
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if (ret)
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return ret;
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*val = asus_wmi_scale_sensor_value(value, sensor->data_type);
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return ret;
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}
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static int asus_wmi_hwmon_read_string(struct device *dev,
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enum hwmon_sensor_types type, u32 attr,
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int channel, const char **str)
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{
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struct asus_wmi_sensors *sensor_data = dev_get_drvdata(dev);
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const struct asus_wmi_sensor_info *sensor;
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sensor = *(sensor_data->wmi.info[type] + channel);
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*str = sensor->name;
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return 0;
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}
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static umode_t asus_wmi_hwmon_is_visible(const void *drvdata,
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enum hwmon_sensor_types type, u32 attr,
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int channel)
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{
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const struct asus_wmi_sensors *sensor_data = drvdata;
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const struct asus_wmi_sensor_info *sensor;
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sensor = *(sensor_data->wmi.info[type] + channel);
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if (sensor)
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return 0444;
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return 0;
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}
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static const struct hwmon_ops asus_wmi_hwmon_ops = {
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.is_visible = asus_wmi_hwmon_is_visible,
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.read = asus_wmi_hwmon_read,
|
|
.read_string = asus_wmi_hwmon_read_string,
|
|
};
|
|
|
|
static struct hwmon_chip_info asus_wmi_chip_info = {
|
|
.ops = &asus_wmi_hwmon_ops,
|
|
.info = NULL,
|
|
};
|
|
|
|
static int asus_wmi_configure_sensor_setup(struct device *dev,
|
|
struct asus_wmi_sensors *sensor_data)
|
|
{
|
|
const struct hwmon_channel_info **ptr_asus_wmi_ci;
|
|
struct hwmon_channel_info *asus_wmi_hwmon_chan;
|
|
int nr_count[hwmon_max] = {}, nr_types = 0;
|
|
struct asus_wmi_sensor_info *temp_sensor;
|
|
const struct hwmon_chip_info *chip_info;
|
|
enum hwmon_sensor_types type;
|
|
struct device *hwdev;
|
|
int i, idx;
|
|
int err;
|
|
|
|
for (i = 0; i < sensor_data->wmi.sensor_count; i++) {
|
|
struct asus_wmi_sensor_info sensor;
|
|
|
|
err = asus_wmi_sensor_info(i, &sensor);
|
|
if (err)
|
|
return err;
|
|
|
|
switch (sensor.data_type) {
|
|
case TEMPERATURE_C:
|
|
case VOLTAGE:
|
|
case CURRENT:
|
|
case FAN_RPM:
|
|
case WATER_FLOW:
|
|
type = asus_data_types[sensor.data_type];
|
|
if (!nr_count[type])
|
|
nr_types++;
|
|
nr_count[type]++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (nr_count[hwmon_temp])
|
|
nr_count[hwmon_chip]++, nr_types++;
|
|
|
|
asus_wmi_hwmon_chan = devm_kcalloc(dev, nr_types,
|
|
sizeof(*asus_wmi_hwmon_chan),
|
|
GFP_KERNEL);
|
|
if (!asus_wmi_hwmon_chan)
|
|
return -ENOMEM;
|
|
|
|
ptr_asus_wmi_ci = devm_kcalloc(dev, nr_types + 1,
|
|
sizeof(*ptr_asus_wmi_ci), GFP_KERNEL);
|
|
if (!ptr_asus_wmi_ci)
|
|
return -ENOMEM;
|
|
|
|
asus_wmi_chip_info.info = ptr_asus_wmi_ci;
|
|
chip_info = &asus_wmi_chip_info;
|
|
|
|
sensor_data->wmi.info_by_id = devm_kcalloc(dev, sensor_data->wmi.sensor_count,
|
|
sizeof(*sensor_data->wmi.info_by_id),
|
|
GFP_KERNEL);
|
|
|
|
if (!sensor_data->wmi.info_by_id)
|
|
return -ENOMEM;
|
|
|
|
for (type = 0; type < hwmon_max; type++) {
|
|
if (!nr_count[type])
|
|
continue;
|
|
|
|
err = asus_wmi_hwmon_add_chan_info(asus_wmi_hwmon_chan, dev,
|
|
nr_count[type], type,
|
|
hwmon_attributes[type]);
|
|
if (err)
|
|
return err;
|
|
|
|
*ptr_asus_wmi_ci++ = asus_wmi_hwmon_chan++;
|
|
|
|
sensor_data->wmi.info[type] = devm_kcalloc(dev,
|
|
nr_count[type],
|
|
sizeof(*sensor_data->wmi.info),
|
|
GFP_KERNEL);
|
|
if (!sensor_data->wmi.info[type])
|
|
return -ENOMEM;
|
|
}
|
|
|
|
for (i = sensor_data->wmi.sensor_count - 1; i >= 0; i--) {
|
|
temp_sensor = devm_kzalloc(dev, sizeof(*temp_sensor), GFP_KERNEL);
|
|
if (!temp_sensor)
|
|
return -ENOMEM;
|
|
|
|
err = asus_wmi_sensor_info(i, temp_sensor);
|
|
if (err)
|
|
continue;
|
|
|
|
switch (temp_sensor->data_type) {
|
|
case TEMPERATURE_C:
|
|
case VOLTAGE:
|
|
case CURRENT:
|
|
case FAN_RPM:
|
|
case WATER_FLOW:
|
|
type = asus_data_types[temp_sensor->data_type];
|
|
idx = --nr_count[type];
|
|
*(sensor_data->wmi.info[type] + idx) = temp_sensor;
|
|
sensor_data->wmi.info_by_id[i] = temp_sensor;
|
|
break;
|
|
}
|
|
}
|
|
|
|
dev_dbg(dev, "board has %d sensors",
|
|
sensor_data->wmi.sensor_count);
|
|
|
|
hwdev = devm_hwmon_device_register_with_info(dev, "asus_wmi_sensors",
|
|
sensor_data, chip_info, NULL);
|
|
|
|
return PTR_ERR_OR_ZERO(hwdev);
|
|
}
|
|
|
|
static int asus_wmi_probe(struct wmi_device *wdev, const void *context)
|
|
{
|
|
struct asus_wmi_sensors *sensor_data;
|
|
struct device *dev = &wdev->dev;
|
|
u32 version = 0;
|
|
|
|
if (!dmi_check_system(asus_wmi_dmi_table))
|
|
return -ENODEV;
|
|
|
|
sensor_data = devm_kzalloc(dev, sizeof(*sensor_data), GFP_KERNEL);
|
|
if (!sensor_data)
|
|
return -ENOMEM;
|
|
|
|
if (asus_wmi_get_version(&version))
|
|
return -ENODEV;
|
|
|
|
if (asus_wmi_get_item_count(&sensor_data->wmi.sensor_count))
|
|
return -ENODEV;
|
|
|
|
if (sensor_data->wmi.sensor_count <= 0 || version < 2) {
|
|
dev_info(dev, "version: %u with %d sensors is unsupported\n",
|
|
version, sensor_data->wmi.sensor_count);
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
mutex_init(&sensor_data->lock);
|
|
|
|
dev_set_drvdata(dev, sensor_data);
|
|
|
|
return asus_wmi_configure_sensor_setup(dev, sensor_data);
|
|
}
|
|
|
|
static const struct wmi_device_id asus_wmi_id_table[] = {
|
|
{ ASUSWMI_MONITORING_GUID, NULL },
|
|
{ }
|
|
};
|
|
|
|
static struct wmi_driver asus_sensors_wmi_driver = {
|
|
.driver = {
|
|
.name = "asus_wmi_sensors",
|
|
},
|
|
.id_table = asus_wmi_id_table,
|
|
.probe = asus_wmi_probe,
|
|
};
|
|
module_wmi_driver(asus_sensors_wmi_driver);
|
|
|
|
MODULE_AUTHOR("Ed Brindley <kernel@maidavale.org>");
|
|
MODULE_DESCRIPTION("Asus WMI Sensors Driver");
|
|
MODULE_LICENSE("GPL");
|