// SPDX-License-Identifier: GPL-2.0-or-later /* * A hwmon driver for the IBM System Director Active Energy Manager (AEM) * temperature/power/energy sensors and capping functionality. * Copyright (C) 2008 IBM * * Author: Darrick J. Wong <[email protected]> */ #define pr_fmt(fmt) … #include <linux/ipmi.h> #include <linux/module.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/jiffies.h> #include <linux/mutex.h> #include <linux/kdev_t.h> #include <linux/spinlock.h> #include <linux/idr.h> #include <linux/slab.h> #include <linux/sched.h> #include <linux/platform_device.h> #include <linux/math64.h> #include <linux/time.h> #include <linux/err.h> #define REFRESH_INTERVAL … #define IPMI_TIMEOUT … #define DRVNAME … #define AEM_NETFN … #define AEM_FIND_FW_CMD … #define AEM_ELEMENT_CMD … #define AEM_FW_INSTANCE_CMD … #define AEM_READ_ELEMENT_CFG … #define AEM_READ_BUFFER … #define AEM_READ_REGISTER … #define AEM_WRITE_REGISTER … #define AEM_SET_REG_MASK … #define AEM_CLEAR_REG_MASK … #define AEM_READ_ELEMENT_CFG2 … #define AEM_CONTROL_ELEMENT … #define AEM_ENERGY_ELEMENT … #define AEM_CLOCK_ELEMENT … #define AEM_POWER_CAP_ELEMENT … #define AEM_EXHAUST_ELEMENT … #define AEM_POWER_ELEMENT … #define AEM_MODULE_TYPE_ID … #define AEM2_NUM_ENERGY_REGS … #define AEM2_NUM_PCAP_REGS … #define AEM2_NUM_TEMP_REGS … #define AEM2_NUM_SENSORS … #define AEM1_NUM_ENERGY_REGS … #define AEM1_NUM_SENSORS … /* AEM 2.x has more energy registers */ #define AEM_NUM_ENERGY_REGS … /* AEM 2.x needs more sensor files */ #define AEM_NUM_SENSORS … #define POWER_CAP … #define POWER_CAP_MAX_HOTPLUG … #define POWER_CAP_MAX … #define POWER_CAP_MIN_WARNING … #define POWER_CAP_MIN … #define POWER_AUX … #define AEM_DEFAULT_POWER_INTERVAL … #define AEM_MIN_POWER_INTERVAL … #define UJ_PER_MJ … static DEFINE_IDA(aem_ida); static struct platform_driver aem_driver = …; struct aem_ipmi_data { … }; struct aem_ro_sensor_template { … }; struct aem_rw_sensor_template { … }; struct aem_data { … }; /* Data structures returned by the AEM firmware */ struct aem_iana_id { … }; static struct aem_iana_id system_x_id = …; /* These are used to find AEM1 instances */ struct aem_find_firmware_req { … } __packed; struct aem_find_firmware_resp { … } __packed; /* These are used to find AEM2 instances */ struct aem_find_instance_req { … } __packed; struct aem_find_instance_resp { … } __packed; /* These are used to query sensors */ struct aem_read_sensor_req { … } __packed; struct aem_read_sensor_resp { … } __packed; /* Data structures to talk to the IPMI layer */ struct aem_driver_data { … }; static void aem_register_bmc(int iface, struct device *dev); static void aem_bmc_gone(int iface); static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data); static void aem_remove_sensors(struct aem_data *data); static int aem1_find_sensors(struct aem_data *data); static int aem2_find_sensors(struct aem_data *data); static void update_aem1_sensors(struct aem_data *data); static void update_aem2_sensors(struct aem_data *data); static struct aem_driver_data driver_data = …; /* Functions to talk to the IPMI layer */ /* Initialize IPMI address, message buffers and user data */ static int aem_init_ipmi_data(struct aem_ipmi_data *data, int iface, struct device *bmc) { … } /* Send an IPMI command */ static int aem_send_message(struct aem_ipmi_data *data) { … } /* Dispatch IPMI messages to callers */ static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data) { … } /* Sensor support functions */ /* Read a sensor value; must be called with data->lock held */ static int aem_read_sensor(struct aem_data *data, u8 elt, u8 reg, void *buf, size_t size) { … } /* Update AEM energy registers */ static void update_aem_energy_one(struct aem_data *data, int which) { … } static void update_aem_energy(struct aem_data *data) { … } /* Update all AEM1 sensors */ static void update_aem1_sensors(struct aem_data *data) { … } /* Update all AEM2 sensors */ static void update_aem2_sensors(struct aem_data *data) { … } /* Delete an AEM instance */ static void aem_delete(struct aem_data *data) { … } /* Probe functions for AEM1 devices */ /* Retrieve version and module handle for an AEM1 instance */ static int aem_find_aem1_count(struct aem_ipmi_data *data) { … } /* Find and initialize one AEM1 instance */ static int aem_init_aem1_inst(struct aem_ipmi_data *probe, u8 module_handle) { … } /* Find and initialize all AEM1 instances */ static void aem_init_aem1(struct aem_ipmi_data *probe) { … } /* Probe functions for AEM2 devices */ /* Retrieve version and module handle for an AEM2 instance */ static int aem_find_aem2(struct aem_ipmi_data *data, struct aem_find_instance_resp *fi_resp, int instance_num) { … } /* Find and initialize one AEM2 instance */ static int aem_init_aem2_inst(struct aem_ipmi_data *probe, struct aem_find_instance_resp *fi_resp) { … } /* Find and initialize all AEM2 instances */ static void aem_init_aem2(struct aem_ipmi_data *probe) { … } /* Probe a BMC for AEM firmware instances */ static void aem_register_bmc(int iface, struct device *dev) { … } /* Handle BMC deletion */ static void aem_bmc_gone(int iface) { … } /* sysfs support functions */ /* AEM device name */ static ssize_t name_show(struct device *dev, struct device_attribute *devattr, char *buf) { … } static SENSOR_DEVICE_ATTR_RO(name, name, 0); /* AEM device version */ static ssize_t version_show(struct device *dev, struct device_attribute *devattr, char *buf) { … } static SENSOR_DEVICE_ATTR_RO(version, version, 0); /* Display power use */ static ssize_t aem_show_power(struct device *dev, struct device_attribute *devattr, char *buf) { … } /* Display energy use */ static ssize_t aem_show_energy(struct device *dev, struct device_attribute *devattr, char *buf) { … } /* Display power interval registers */ static ssize_t aem_show_power_period(struct device *dev, struct device_attribute *devattr, char *buf) { … } /* Set power interval registers */ static ssize_t aem_set_power_period(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { … } /* Discover sensors on an AEM device */ static int aem_register_sensors(struct aem_data *data, const struct aem_ro_sensor_template *ro, const struct aem_rw_sensor_template *rw) { … } /* sysfs support functions for AEM2 sensors */ /* Display temperature use */ static ssize_t aem2_show_temp(struct device *dev, struct device_attribute *devattr, char *buf) { … } /* Display power-capping registers */ static ssize_t aem2_show_pcap_value(struct device *dev, struct device_attribute *devattr, char *buf) { … } /* Remove sensors attached to an AEM device */ static void aem_remove_sensors(struct aem_data *data) { … } /* Sensor probe functions */ /* Description of AEM1 sensors */ static const struct aem_ro_sensor_template aem1_ro_sensors[] = …; static const struct aem_rw_sensor_template aem1_rw_sensors[] = …; /* Description of AEM2 sensors */ static const struct aem_ro_sensor_template aem2_ro_sensors[] = …; static const struct aem_rw_sensor_template aem2_rw_sensors[] = …; /* Set up AEM1 sensor attrs */ static int aem1_find_sensors(struct aem_data *data) { … } /* Set up AEM2 sensor attrs */ static int aem2_find_sensors(struct aem_data *data) { … } /* Module init/exit routines */ static int __init aem_init(void) { … } static void __exit aem_exit(void) { … } MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; module_init(…) …; module_exit(aem_exit); MODULE_ALIAS(…) …; MODULE_ALIAS(…) …; MODULE_ALIAS(…) …; MODULE_ALIAS(…) …; MODULE_ALIAS(…) …; MODULE_ALIAS(…) …; MODULE_ALIAS(…) …;
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