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1103 lines
26 KiB
1103 lines
26 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* A hwmon driver for the IBM System Director Active Energy Manager (AEM) |
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* temperature/power/energy sensors and capping functionality. |
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* Copyright (C) 2008 IBM |
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* |
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* Author: Darrick J. Wong <[email protected]> |
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*/ |
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|
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/ipmi.h> |
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#include <linux/module.h> |
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#include <linux/hwmon.h> |
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#include <linux/hwmon-sysfs.h> |
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#include <linux/jiffies.h> |
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#include <linux/mutex.h> |
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#include <linux/kdev_t.h> |
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#include <linux/spinlock.h> |
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#include <linux/idr.h> |
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#include <linux/slab.h> |
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#include <linux/sched.h> |
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#include <linux/platform_device.h> |
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#include <linux/math64.h> |
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#include <linux/time.h> |
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#include <linux/err.h> |
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#define REFRESH_INTERVAL (HZ) |
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#define IPMI_TIMEOUT (30 * HZ) |
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#define DRVNAME "aem" |
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#define AEM_NETFN 0x2E |
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#define AEM_FIND_FW_CMD 0x80 |
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#define AEM_ELEMENT_CMD 0x81 |
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#define AEM_FW_INSTANCE_CMD 0x82 |
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#define AEM_READ_ELEMENT_CFG 0x80 |
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#define AEM_READ_BUFFER 0x81 |
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#define AEM_READ_REGISTER 0x82 |
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#define AEM_WRITE_REGISTER 0x83 |
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#define AEM_SET_REG_MASK 0x84 |
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#define AEM_CLEAR_REG_MASK 0x85 |
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#define AEM_READ_ELEMENT_CFG2 0x86 |
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#define AEM_CONTROL_ELEMENT 0 |
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#define AEM_ENERGY_ELEMENT 1 |
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#define AEM_CLOCK_ELEMENT 4 |
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#define AEM_POWER_CAP_ELEMENT 7 |
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#define AEM_EXHAUST_ELEMENT 9 |
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#define AEM_POWER_ELEMENT 10 |
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#define AEM_MODULE_TYPE_ID 0x0001 |
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#define AEM2_NUM_ENERGY_REGS 2 |
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#define AEM2_NUM_PCAP_REGS 6 |
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#define AEM2_NUM_TEMP_REGS 2 |
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#define AEM2_NUM_SENSORS 14 |
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#define AEM1_NUM_ENERGY_REGS 1 |
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#define AEM1_NUM_SENSORS 3 |
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/* AEM 2.x has more energy registers */ |
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#define AEM_NUM_ENERGY_REGS AEM2_NUM_ENERGY_REGS |
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/* AEM 2.x needs more sensor files */ |
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#define AEM_NUM_SENSORS AEM2_NUM_SENSORS |
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#define POWER_CAP 0 |
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#define POWER_CAP_MAX_HOTPLUG 1 |
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#define POWER_CAP_MAX 2 |
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#define POWER_CAP_MIN_WARNING 3 |
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#define POWER_CAP_MIN 4 |
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#define POWER_AUX 5 |
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#define AEM_DEFAULT_POWER_INTERVAL 1000 |
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#define AEM_MIN_POWER_INTERVAL 200 |
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#define UJ_PER_MJ 1000L |
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static DEFINE_IDA(aem_ida); |
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static struct platform_driver aem_driver = { |
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.driver = { |
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.name = DRVNAME, |
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.bus = &platform_bus_type, |
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} |
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}; |
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struct aem_ipmi_data { |
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struct completion read_complete; |
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struct ipmi_addr address; |
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struct ipmi_user *user; |
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int interface; |
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struct kernel_ipmi_msg tx_message; |
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long tx_msgid; |
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void *rx_msg_data; |
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unsigned short rx_msg_len; |
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unsigned char rx_result; |
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int rx_recv_type; |
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struct device *bmc_device; |
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}; |
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struct aem_ro_sensor_template { |
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char *label; |
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ssize_t (*show)(struct device *dev, |
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struct device_attribute *devattr, |
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char *buf); |
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int index; |
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}; |
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struct aem_rw_sensor_template { |
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char *label; |
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ssize_t (*show)(struct device *dev, |
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struct device_attribute *devattr, |
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char *buf); |
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ssize_t (*set)(struct device *dev, |
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struct device_attribute *devattr, |
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const char *buf, size_t count); |
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int index; |
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}; |
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struct aem_data { |
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struct list_head list; |
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struct device *hwmon_dev; |
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struct platform_device *pdev; |
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struct mutex lock; |
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char valid; |
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unsigned long last_updated; /* In jiffies */ |
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u8 ver_major; |
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u8 ver_minor; |
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u8 module_handle; |
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int id; |
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struct aem_ipmi_data ipmi; |
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|
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/* Function and buffer to update sensors */ |
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void (*update)(struct aem_data *data); |
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struct aem_read_sensor_resp *rs_resp; |
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/* |
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* AEM 1.x sensors: |
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* Available sensors: |
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* Energy meter |
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* Power meter |
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* |
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* AEM 2.x sensors: |
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* Two energy meters |
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* Two power meters |
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* Two temperature sensors |
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* Six power cap registers |
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*/ |
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/* sysfs attrs */ |
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struct sensor_device_attribute sensors[AEM_NUM_SENSORS]; |
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/* energy use in mJ */ |
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u64 energy[AEM_NUM_ENERGY_REGS]; |
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/* power sampling interval in ms */ |
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unsigned long power_period[AEM_NUM_ENERGY_REGS]; |
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/* Everything past here is for AEM2 only */ |
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/* power caps in dW */ |
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u16 pcap[AEM2_NUM_PCAP_REGS]; |
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/* exhaust temperature in C */ |
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u8 temp[AEM2_NUM_TEMP_REGS]; |
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}; |
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/* Data structures returned by the AEM firmware */ |
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struct aem_iana_id { |
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u8 bytes[3]; |
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}; |
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static struct aem_iana_id system_x_id = { |
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.bytes = {0x4D, 0x4F, 0x00} |
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}; |
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/* These are used to find AEM1 instances */ |
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struct aem_find_firmware_req { |
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struct aem_iana_id id; |
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u8 rsvd; |
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__be16 index; |
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__be16 module_type_id; |
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} __packed; |
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struct aem_find_firmware_resp { |
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struct aem_iana_id id; |
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u8 num_instances; |
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} __packed; |
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/* These are used to find AEM2 instances */ |
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struct aem_find_instance_req { |
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struct aem_iana_id id; |
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u8 instance_number; |
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__be16 module_type_id; |
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} __packed; |
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struct aem_find_instance_resp { |
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struct aem_iana_id id; |
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u8 num_instances; |
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u8 major; |
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u8 minor; |
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u8 module_handle; |
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u16 record_id; |
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} __packed; |
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/* These are used to query sensors */ |
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struct aem_read_sensor_req { |
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struct aem_iana_id id; |
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u8 module_handle; |
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u8 element; |
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u8 subcommand; |
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u8 reg; |
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u8 rx_buf_size; |
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} __packed; |
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struct aem_read_sensor_resp { |
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struct aem_iana_id id; |
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u8 bytes[]; |
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} __packed; |
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/* Data structures to talk to the IPMI layer */ |
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struct aem_driver_data { |
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struct list_head aem_devices; |
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struct ipmi_smi_watcher bmc_events; |
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struct ipmi_user_hndl ipmi_hndlrs; |
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}; |
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static void aem_register_bmc(int iface, struct device *dev); |
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static void aem_bmc_gone(int iface); |
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static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data); |
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static void aem_remove_sensors(struct aem_data *data); |
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static int aem1_find_sensors(struct aem_data *data); |
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static int aem2_find_sensors(struct aem_data *data); |
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static void update_aem1_sensors(struct aem_data *data); |
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static void update_aem2_sensors(struct aem_data *data); |
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static struct aem_driver_data driver_data = { |
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.aem_devices = LIST_HEAD_INIT(driver_data.aem_devices), |
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.bmc_events = { |
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.owner = THIS_MODULE, |
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.new_smi = aem_register_bmc, |
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.smi_gone = aem_bmc_gone, |
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}, |
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.ipmi_hndlrs = { |
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.ipmi_recv_hndl = aem_msg_handler, |
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}, |
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}; |
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/* Functions to talk to the IPMI layer */ |
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/* Initialize IPMI address, message buffers and user data */ |
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static int aem_init_ipmi_data(struct aem_ipmi_data *data, int iface, |
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struct device *bmc) |
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{ |
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int err; |
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init_completion(&data->read_complete); |
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data->bmc_device = bmc; |
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/* Initialize IPMI address */ |
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data->address.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; |
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data->address.channel = IPMI_BMC_CHANNEL; |
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data->address.data[0] = 0; |
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data->interface = iface; |
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/* Initialize message buffers */ |
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data->tx_msgid = 0; |
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data->tx_message.netfn = AEM_NETFN; |
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/* Create IPMI messaging interface user */ |
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err = ipmi_create_user(data->interface, &driver_data.ipmi_hndlrs, |
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data, &data->user); |
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if (err < 0) { |
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dev_err(bmc, |
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"Unable to register user with IPMI interface %d\n", |
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data->interface); |
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return err; |
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} |
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return 0; |
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} |
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/* Send an IPMI command */ |
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static int aem_send_message(struct aem_ipmi_data *data) |
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{ |
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int err; |
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err = ipmi_validate_addr(&data->address, sizeof(data->address)); |
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if (err) |
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goto out; |
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data->tx_msgid++; |
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err = ipmi_request_settime(data->user, &data->address, data->tx_msgid, |
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&data->tx_message, data, 0, 0, 0); |
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if (err) |
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goto out1; |
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return 0; |
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out1: |
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dev_err(data->bmc_device, "request_settime=%x\n", err); |
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return err; |
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out: |
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dev_err(data->bmc_device, "validate_addr=%x\n", err); |
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return err; |
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} |
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/* Dispatch IPMI messages to callers */ |
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static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data) |
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{ |
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unsigned short rx_len; |
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struct aem_ipmi_data *data = user_msg_data; |
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if (msg->msgid != data->tx_msgid) { |
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dev_err(data->bmc_device, |
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"Mismatch between received msgid (%02x) and transmitted msgid (%02x)!\n", |
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(int)msg->msgid, |
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(int)data->tx_msgid); |
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ipmi_free_recv_msg(msg); |
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return; |
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} |
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data->rx_recv_type = msg->recv_type; |
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if (msg->msg.data_len > 0) |
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data->rx_result = msg->msg.data[0]; |
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else |
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data->rx_result = IPMI_UNKNOWN_ERR_COMPLETION_CODE; |
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if (msg->msg.data_len > 1) { |
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rx_len = msg->msg.data_len - 1; |
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if (data->rx_msg_len < rx_len) |
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rx_len = data->rx_msg_len; |
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data->rx_msg_len = rx_len; |
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memcpy(data->rx_msg_data, msg->msg.data + 1, data->rx_msg_len); |
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} else |
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data->rx_msg_len = 0; |
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ipmi_free_recv_msg(msg); |
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complete(&data->read_complete); |
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} |
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/* Sensor support functions */ |
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/* Read a sensor value; must be called with data->lock held */ |
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static int aem_read_sensor(struct aem_data *data, u8 elt, u8 reg, |
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void *buf, size_t size) |
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{ |
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int rs_size, res; |
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struct aem_read_sensor_req rs_req; |
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/* Use preallocated rx buffer */ |
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struct aem_read_sensor_resp *rs_resp = data->rs_resp; |
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struct aem_ipmi_data *ipmi = &data->ipmi; |
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/* AEM registers are 1, 2, 4 or 8 bytes */ |
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switch (size) { |
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case 1: |
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case 2: |
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case 4: |
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case 8: |
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break; |
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default: |
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return -EINVAL; |
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} |
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rs_req.id = system_x_id; |
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rs_req.module_handle = data->module_handle; |
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rs_req.element = elt; |
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rs_req.subcommand = AEM_READ_REGISTER; |
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rs_req.reg = reg; |
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rs_req.rx_buf_size = size; |
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ipmi->tx_message.cmd = AEM_ELEMENT_CMD; |
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ipmi->tx_message.data = (char *)&rs_req; |
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ipmi->tx_message.data_len = sizeof(rs_req); |
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rs_size = sizeof(*rs_resp) + size; |
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ipmi->rx_msg_data = rs_resp; |
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ipmi->rx_msg_len = rs_size; |
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aem_send_message(ipmi); |
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res = wait_for_completion_timeout(&ipmi->read_complete, IPMI_TIMEOUT); |
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if (!res) { |
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res = -ETIMEDOUT; |
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goto out; |
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} |
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if (ipmi->rx_result || ipmi->rx_msg_len != rs_size || |
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memcmp(&rs_resp->id, &system_x_id, sizeof(system_x_id))) { |
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res = -ENOENT; |
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goto out; |
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} |
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switch (size) { |
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case 1: { |
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u8 *x = buf; |
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*x = rs_resp->bytes[0]; |
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break; |
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} |
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case 2: { |
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u16 *x = buf; |
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*x = be16_to_cpup((__be16 *)rs_resp->bytes); |
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break; |
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} |
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case 4: { |
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u32 *x = buf; |
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*x = be32_to_cpup((__be32 *)rs_resp->bytes); |
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break; |
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} |
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case 8: { |
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u64 *x = buf; |
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*x = be64_to_cpup((__be64 *)rs_resp->bytes); |
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break; |
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} |
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} |
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res = 0; |
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out: |
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return res; |
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} |
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/* Update AEM energy registers */ |
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static void update_aem_energy_one(struct aem_data *data, int which) |
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{ |
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aem_read_sensor(data, AEM_ENERGY_ELEMENT, which, |
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&data->energy[which], 8); |
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} |
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static void update_aem_energy(struct aem_data *data) |
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{ |
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update_aem_energy_one(data, 0); |
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if (data->ver_major < 2) |
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return; |
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update_aem_energy_one(data, 1); |
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} |
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/* Update all AEM1 sensors */ |
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static void update_aem1_sensors(struct aem_data *data) |
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{ |
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mutex_lock(&data->lock); |
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if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) && |
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data->valid) |
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goto out; |
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update_aem_energy(data); |
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out: |
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mutex_unlock(&data->lock); |
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} |
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/* Update all AEM2 sensors */ |
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static void update_aem2_sensors(struct aem_data *data) |
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{ |
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int i; |
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mutex_lock(&data->lock); |
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if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) && |
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data->valid) |
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goto out; |
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update_aem_energy(data); |
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aem_read_sensor(data, AEM_EXHAUST_ELEMENT, 0, &data->temp[0], 1); |
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aem_read_sensor(data, AEM_EXHAUST_ELEMENT, 1, &data->temp[1], 1); |
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for (i = POWER_CAP; i <= POWER_AUX; i++) |
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aem_read_sensor(data, AEM_POWER_CAP_ELEMENT, i, |
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&data->pcap[i], 2); |
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out: |
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mutex_unlock(&data->lock); |
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} |
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/* Delete an AEM instance */ |
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static void aem_delete(struct aem_data *data) |
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{ |
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list_del(&data->list); |
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aem_remove_sensors(data); |
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kfree(data->rs_resp); |
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hwmon_device_unregister(data->hwmon_dev); |
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ipmi_destroy_user(data->ipmi.user); |
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platform_set_drvdata(data->pdev, NULL); |
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platform_device_unregister(data->pdev); |
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ida_simple_remove(&aem_ida, data->id); |
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kfree(data); |
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} |
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/* Probe functions for AEM1 devices */ |
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|
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/* Retrieve version and module handle for an AEM1 instance */ |
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static int aem_find_aem1_count(struct aem_ipmi_data *data) |
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{ |
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int res; |
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struct aem_find_firmware_req ff_req; |
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struct aem_find_firmware_resp ff_resp; |
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ff_req.id = system_x_id; |
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ff_req.index = 0; |
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ff_req.module_type_id = cpu_to_be16(AEM_MODULE_TYPE_ID); |
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data->tx_message.cmd = AEM_FIND_FW_CMD; |
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data->tx_message.data = (char *)&ff_req; |
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data->tx_message.data_len = sizeof(ff_req); |
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data->rx_msg_data = &ff_resp; |
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data->rx_msg_len = sizeof(ff_resp); |
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aem_send_message(data); |
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res = wait_for_completion_timeout(&data->read_complete, IPMI_TIMEOUT); |
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if (!res) |
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return -ETIMEDOUT; |
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if (data->rx_result || data->rx_msg_len != sizeof(ff_resp) || |
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memcmp(&ff_resp.id, &system_x_id, sizeof(system_x_id))) |
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return -ENOENT; |
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return ff_resp.num_instances; |
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} |
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/* Find and initialize one AEM1 instance */ |
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static int aem_init_aem1_inst(struct aem_ipmi_data *probe, u8 module_handle) |
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{ |
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struct aem_data *data; |
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int i; |
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int res = -ENOMEM; |
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data = kzalloc(sizeof(*data), GFP_KERNEL); |
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if (!data) |
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return res; |
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mutex_init(&data->lock); |
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/* Copy instance data */ |
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data->ver_major = 1; |
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data->ver_minor = 0; |
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data->module_handle = module_handle; |
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for (i = 0; i < AEM1_NUM_ENERGY_REGS; i++) |
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data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL; |
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/* Create sub-device for this fw instance */ |
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data->id = ida_simple_get(&aem_ida, 0, 0, GFP_KERNEL); |
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if (data->id < 0) |
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goto id_err; |
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data->pdev = platform_device_alloc(DRVNAME, data->id); |
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if (!data->pdev) |
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goto dev_err; |
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data->pdev->dev.driver = &aem_driver.driver; |
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res = platform_device_add(data->pdev); |
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if (res) |
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goto ipmi_err; |
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platform_set_drvdata(data->pdev, data); |
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/* Set up IPMI interface */ |
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res = aem_init_ipmi_data(&data->ipmi, probe->interface, |
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probe->bmc_device); |
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if (res) |
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goto ipmi_err; |
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|
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/* Register with hwmon */ |
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data->hwmon_dev = hwmon_device_register(&data->pdev->dev); |
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if (IS_ERR(data->hwmon_dev)) { |
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dev_err(&data->pdev->dev, |
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"Unable to register hwmon device for IPMI interface %d\n", |
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probe->interface); |
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res = PTR_ERR(data->hwmon_dev); |
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goto hwmon_reg_err; |
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} |
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data->update = update_aem1_sensors; |
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data->rs_resp = kzalloc(sizeof(*(data->rs_resp)) + 8, GFP_KERNEL); |
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if (!data->rs_resp) { |
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res = -ENOMEM; |
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goto alloc_resp_err; |
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} |
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|
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/* Find sensors */ |
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res = aem1_find_sensors(data); |
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if (res) |
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goto sensor_err; |
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|
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/* Add to our list of AEM devices */ |
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list_add_tail(&data->list, &driver_data.aem_devices); |
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|
|
dev_info(data->ipmi.bmc_device, "Found AEM v%d.%d at 0x%X\n", |
|
data->ver_major, data->ver_minor, |
|
data->module_handle); |
|
return 0; |
|
|
|
sensor_err: |
|
kfree(data->rs_resp); |
|
alloc_resp_err: |
|
hwmon_device_unregister(data->hwmon_dev); |
|
hwmon_reg_err: |
|
ipmi_destroy_user(data->ipmi.user); |
|
ipmi_err: |
|
platform_set_drvdata(data->pdev, NULL); |
|
platform_device_unregister(data->pdev); |
|
dev_err: |
|
ida_simple_remove(&aem_ida, data->id); |
|
id_err: |
|
kfree(data); |
|
|
|
return res; |
|
} |
|
|
|
/* Find and initialize all AEM1 instances */ |
|
static void aem_init_aem1(struct aem_ipmi_data *probe) |
|
{ |
|
int num, i, err; |
|
|
|
num = aem_find_aem1_count(probe); |
|
for (i = 0; i < num; i++) { |
|
err = aem_init_aem1_inst(probe, i); |
|
if (err) { |
|
dev_err(probe->bmc_device, |
|
"Error %d initializing AEM1 0x%X\n", |
|
err, i); |
|
} |
|
} |
|
} |
|
|
|
/* 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) |
|
{ |
|
int res; |
|
struct aem_find_instance_req fi_req; |
|
|
|
fi_req.id = system_x_id; |
|
fi_req.instance_number = instance_num; |
|
fi_req.module_type_id = cpu_to_be16(AEM_MODULE_TYPE_ID); |
|
|
|
data->tx_message.cmd = AEM_FW_INSTANCE_CMD; |
|
data->tx_message.data = (char *)&fi_req; |
|
data->tx_message.data_len = sizeof(fi_req); |
|
|
|
data->rx_msg_data = fi_resp; |
|
data->rx_msg_len = sizeof(*fi_resp); |
|
|
|
aem_send_message(data); |
|
|
|
res = wait_for_completion_timeout(&data->read_complete, IPMI_TIMEOUT); |
|
if (!res) |
|
return -ETIMEDOUT; |
|
|
|
if (data->rx_result || data->rx_msg_len != sizeof(*fi_resp) || |
|
memcmp(&fi_resp->id, &system_x_id, sizeof(system_x_id)) || |
|
fi_resp->num_instances <= instance_num) |
|
return -ENOENT; |
|
|
|
return 0; |
|
} |
|
|
|
/* Find and initialize one AEM2 instance */ |
|
static int aem_init_aem2_inst(struct aem_ipmi_data *probe, |
|
struct aem_find_instance_resp *fi_resp) |
|
{ |
|
struct aem_data *data; |
|
int i; |
|
int res = -ENOMEM; |
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL); |
|
if (!data) |
|
return res; |
|
mutex_init(&data->lock); |
|
|
|
/* Copy instance data */ |
|
data->ver_major = fi_resp->major; |
|
data->ver_minor = fi_resp->minor; |
|
data->module_handle = fi_resp->module_handle; |
|
for (i = 0; i < AEM2_NUM_ENERGY_REGS; i++) |
|
data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL; |
|
|
|
/* Create sub-device for this fw instance */ |
|
data->id = ida_simple_get(&aem_ida, 0, 0, GFP_KERNEL); |
|
if (data->id < 0) |
|
goto id_err; |
|
|
|
data->pdev = platform_device_alloc(DRVNAME, data->id); |
|
if (!data->pdev) |
|
goto dev_err; |
|
data->pdev->dev.driver = &aem_driver.driver; |
|
|
|
res = platform_device_add(data->pdev); |
|
if (res) |
|
goto ipmi_err; |
|
|
|
platform_set_drvdata(data->pdev, data); |
|
|
|
/* Set up IPMI interface */ |
|
res = aem_init_ipmi_data(&data->ipmi, probe->interface, |
|
probe->bmc_device); |
|
if (res) |
|
goto ipmi_err; |
|
|
|
/* Register with hwmon */ |
|
data->hwmon_dev = hwmon_device_register(&data->pdev->dev); |
|
if (IS_ERR(data->hwmon_dev)) { |
|
dev_err(&data->pdev->dev, |
|
"Unable to register hwmon device for IPMI interface %d\n", |
|
probe->interface); |
|
res = PTR_ERR(data->hwmon_dev); |
|
goto hwmon_reg_err; |
|
} |
|
|
|
data->update = update_aem2_sensors; |
|
data->rs_resp = kzalloc(sizeof(*(data->rs_resp)) + 8, GFP_KERNEL); |
|
if (!data->rs_resp) { |
|
res = -ENOMEM; |
|
goto alloc_resp_err; |
|
} |
|
|
|
/* Find sensors */ |
|
res = aem2_find_sensors(data); |
|
if (res) |
|
goto sensor_err; |
|
|
|
/* Add to our list of AEM devices */ |
|
list_add_tail(&data->list, &driver_data.aem_devices); |
|
|
|
dev_info(data->ipmi.bmc_device, "Found AEM v%d.%d at 0x%X\n", |
|
data->ver_major, data->ver_minor, |
|
data->module_handle); |
|
return 0; |
|
|
|
sensor_err: |
|
kfree(data->rs_resp); |
|
alloc_resp_err: |
|
hwmon_device_unregister(data->hwmon_dev); |
|
hwmon_reg_err: |
|
ipmi_destroy_user(data->ipmi.user); |
|
ipmi_err: |
|
platform_set_drvdata(data->pdev, NULL); |
|
platform_device_unregister(data->pdev); |
|
dev_err: |
|
ida_simple_remove(&aem_ida, data->id); |
|
id_err: |
|
kfree(data); |
|
|
|
return res; |
|
} |
|
|
|
/* Find and initialize all AEM2 instances */ |
|
static void aem_init_aem2(struct aem_ipmi_data *probe) |
|
{ |
|
struct aem_find_instance_resp fi_resp; |
|
int err; |
|
int i = 0; |
|
|
|
while (!aem_find_aem2(probe, &fi_resp, i)) { |
|
if (fi_resp.major != 2) { |
|
dev_err(probe->bmc_device, |
|
"Unknown AEM v%d; please report this to the maintainer.\n", |
|
fi_resp.major); |
|
i++; |
|
continue; |
|
} |
|
err = aem_init_aem2_inst(probe, &fi_resp); |
|
if (err) { |
|
dev_err(probe->bmc_device, |
|
"Error %d initializing AEM2 0x%X\n", |
|
err, fi_resp.module_handle); |
|
} |
|
i++; |
|
} |
|
} |
|
|
|
/* Probe a BMC for AEM firmware instances */ |
|
static void aem_register_bmc(int iface, struct device *dev) |
|
{ |
|
struct aem_ipmi_data probe; |
|
|
|
if (aem_init_ipmi_data(&probe, iface, dev)) |
|
return; |
|
|
|
/* Ignore probe errors; they won't cause problems */ |
|
aem_init_aem1(&probe); |
|
aem_init_aem2(&probe); |
|
|
|
ipmi_destroy_user(probe.user); |
|
} |
|
|
|
/* Handle BMC deletion */ |
|
static void aem_bmc_gone(int iface) |
|
{ |
|
struct aem_data *p1, *next1; |
|
|
|
list_for_each_entry_safe(p1, next1, &driver_data.aem_devices, list) |
|
if (p1->ipmi.interface == iface) |
|
aem_delete(p1); |
|
} |
|
|
|
/* sysfs support functions */ |
|
|
|
/* AEM device name */ |
|
static ssize_t name_show(struct device *dev, struct device_attribute *devattr, |
|
char *buf) |
|
{ |
|
struct aem_data *data = dev_get_drvdata(dev); |
|
|
|
return sprintf(buf, "%s%d\n", DRVNAME, data->ver_major); |
|
} |
|
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) |
|
{ |
|
struct aem_data *data = dev_get_drvdata(dev); |
|
|
|
return sprintf(buf, "%d.%d\n", data->ver_major, data->ver_minor); |
|
} |
|
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) |
|
{ |
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
|
struct aem_data *data = dev_get_drvdata(dev); |
|
u64 before, after, delta, time; |
|
signed long leftover; |
|
|
|
mutex_lock(&data->lock); |
|
update_aem_energy_one(data, attr->index); |
|
time = ktime_get_ns(); |
|
before = data->energy[attr->index]; |
|
|
|
leftover = schedule_timeout_interruptible( |
|
msecs_to_jiffies(data->power_period[attr->index]) |
|
); |
|
if (leftover) { |
|
mutex_unlock(&data->lock); |
|
return 0; |
|
} |
|
|
|
update_aem_energy_one(data, attr->index); |
|
time = ktime_get_ns() - time; |
|
after = data->energy[attr->index]; |
|
mutex_unlock(&data->lock); |
|
|
|
delta = (after - before) * UJ_PER_MJ; |
|
|
|
return sprintf(buf, "%llu\n", |
|
(unsigned long long)div64_u64(delta * NSEC_PER_SEC, time)); |
|
} |
|
|
|
/* Display energy use */ |
|
static ssize_t aem_show_energy(struct device *dev, |
|
struct device_attribute *devattr, |
|
char *buf) |
|
{ |
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
|
struct aem_data *a = dev_get_drvdata(dev); |
|
mutex_lock(&a->lock); |
|
update_aem_energy_one(a, attr->index); |
|
mutex_unlock(&a->lock); |
|
|
|
return sprintf(buf, "%llu\n", |
|
(unsigned long long)a->energy[attr->index] * 1000); |
|
} |
|
|
|
/* Display power interval registers */ |
|
static ssize_t aem_show_power_period(struct device *dev, |
|
struct device_attribute *devattr, |
|
char *buf) |
|
{ |
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
|
struct aem_data *a = dev_get_drvdata(dev); |
|
a->update(a); |
|
|
|
return sprintf(buf, "%lu\n", a->power_period[attr->index]); |
|
} |
|
|
|
/* Set power interval registers */ |
|
static ssize_t aem_set_power_period(struct device *dev, |
|
struct device_attribute *devattr, |
|
const char *buf, size_t count) |
|
{ |
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
|
struct aem_data *a = dev_get_drvdata(dev); |
|
unsigned long temp; |
|
int res; |
|
|
|
res = kstrtoul(buf, 10, &temp); |
|
if (res) |
|
return res; |
|
|
|
if (temp < AEM_MIN_POWER_INTERVAL) |
|
return -EINVAL; |
|
|
|
mutex_lock(&a->lock); |
|
a->power_period[attr->index] = temp; |
|
mutex_unlock(&a->lock); |
|
|
|
return 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) |
|
{ |
|
struct device *dev = &data->pdev->dev; |
|
struct sensor_device_attribute *sensors = data->sensors; |
|
int err; |
|
|
|
/* Set up read-only sensors */ |
|
while (ro->label) { |
|
sysfs_attr_init(&sensors->dev_attr.attr); |
|
sensors->dev_attr.attr.name = ro->label; |
|
sensors->dev_attr.attr.mode = 0444; |
|
sensors->dev_attr.show = ro->show; |
|
sensors->index = ro->index; |
|
|
|
err = device_create_file(dev, &sensors->dev_attr); |
|
if (err) { |
|
sensors->dev_attr.attr.name = NULL; |
|
goto error; |
|
} |
|
sensors++; |
|
ro++; |
|
} |
|
|
|
/* Set up read-write sensors */ |
|
while (rw->label) { |
|
sysfs_attr_init(&sensors->dev_attr.attr); |
|
sensors->dev_attr.attr.name = rw->label; |
|
sensors->dev_attr.attr.mode = 0644; |
|
sensors->dev_attr.show = rw->show; |
|
sensors->dev_attr.store = rw->set; |
|
sensors->index = rw->index; |
|
|
|
err = device_create_file(dev, &sensors->dev_attr); |
|
if (err) { |
|
sensors->dev_attr.attr.name = NULL; |
|
goto error; |
|
} |
|
sensors++; |
|
rw++; |
|
} |
|
|
|
err = device_create_file(dev, &sensor_dev_attr_name.dev_attr); |
|
if (err) |
|
goto error; |
|
err = device_create_file(dev, &sensor_dev_attr_version.dev_attr); |
|
return err; |
|
|
|
error: |
|
aem_remove_sensors(data); |
|
return err; |
|
} |
|
|
|
/* sysfs support functions for AEM2 sensors */ |
|
|
|
/* Display temperature use */ |
|
static ssize_t aem2_show_temp(struct device *dev, |
|
struct device_attribute *devattr, |
|
char *buf) |
|
{ |
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
|
struct aem_data *a = dev_get_drvdata(dev); |
|
a->update(a); |
|
|
|
return sprintf(buf, "%u\n", a->temp[attr->index] * 1000); |
|
} |
|
|
|
/* Display power-capping registers */ |
|
static ssize_t aem2_show_pcap_value(struct device *dev, |
|
struct device_attribute *devattr, |
|
char *buf) |
|
{ |
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
|
struct aem_data *a = dev_get_drvdata(dev); |
|
a->update(a); |
|
|
|
return sprintf(buf, "%u\n", a->pcap[attr->index] * 100000); |
|
} |
|
|
|
/* Remove sensors attached to an AEM device */ |
|
static void aem_remove_sensors(struct aem_data *data) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < AEM_NUM_SENSORS; i++) { |
|
if (!data->sensors[i].dev_attr.attr.name) |
|
continue; |
|
device_remove_file(&data->pdev->dev, |
|
&data->sensors[i].dev_attr); |
|
} |
|
|
|
device_remove_file(&data->pdev->dev, |
|
&sensor_dev_attr_name.dev_attr); |
|
device_remove_file(&data->pdev->dev, |
|
&sensor_dev_attr_version.dev_attr); |
|
} |
|
|
|
/* Sensor probe functions */ |
|
|
|
/* Description of AEM1 sensors */ |
|
static const struct aem_ro_sensor_template aem1_ro_sensors[] = { |
|
{"energy1_input", aem_show_energy, 0}, |
|
{"power1_average", aem_show_power, 0}, |
|
{NULL, NULL, 0}, |
|
}; |
|
|
|
static const struct aem_rw_sensor_template aem1_rw_sensors[] = { |
|
{"power1_average_interval", aem_show_power_period, aem_set_power_period, 0}, |
|
{NULL, NULL, NULL, 0}, |
|
}; |
|
|
|
/* Description of AEM2 sensors */ |
|
static const struct aem_ro_sensor_template aem2_ro_sensors[] = { |
|
{"energy1_input", aem_show_energy, 0}, |
|
{"energy2_input", aem_show_energy, 1}, |
|
{"power1_average", aem_show_power, 0}, |
|
{"power2_average", aem_show_power, 1}, |
|
{"temp1_input", aem2_show_temp, 0}, |
|
{"temp2_input", aem2_show_temp, 1}, |
|
|
|
{"power4_average", aem2_show_pcap_value, POWER_CAP_MAX_HOTPLUG}, |
|
{"power5_average", aem2_show_pcap_value, POWER_CAP_MAX}, |
|
{"power6_average", aem2_show_pcap_value, POWER_CAP_MIN_WARNING}, |
|
{"power7_average", aem2_show_pcap_value, POWER_CAP_MIN}, |
|
|
|
{"power3_average", aem2_show_pcap_value, POWER_AUX}, |
|
{"power_cap", aem2_show_pcap_value, POWER_CAP}, |
|
{NULL, NULL, 0}, |
|
}; |
|
|
|
static const struct aem_rw_sensor_template aem2_rw_sensors[] = { |
|
{"power1_average_interval", aem_show_power_period, aem_set_power_period, 0}, |
|
{"power2_average_interval", aem_show_power_period, aem_set_power_period, 1}, |
|
{NULL, NULL, NULL, 0}, |
|
}; |
|
|
|
/* Set up AEM1 sensor attrs */ |
|
static int aem1_find_sensors(struct aem_data *data) |
|
{ |
|
return aem_register_sensors(data, aem1_ro_sensors, aem1_rw_sensors); |
|
} |
|
|
|
/* Set up AEM2 sensor attrs */ |
|
static int aem2_find_sensors(struct aem_data *data) |
|
{ |
|
return aem_register_sensors(data, aem2_ro_sensors, aem2_rw_sensors); |
|
} |
|
|
|
/* Module init/exit routines */ |
|
|
|
static int __init aem_init(void) |
|
{ |
|
int res; |
|
|
|
res = driver_register(&aem_driver.driver); |
|
if (res) { |
|
pr_err("Can't register aem driver\n"); |
|
return res; |
|
} |
|
|
|
res = ipmi_smi_watcher_register(&driver_data.bmc_events); |
|
if (res) |
|
goto ipmi_reg_err; |
|
return 0; |
|
|
|
ipmi_reg_err: |
|
driver_unregister(&aem_driver.driver); |
|
return res; |
|
|
|
} |
|
|
|
static void __exit aem_exit(void) |
|
{ |
|
struct aem_data *p1, *next1; |
|
|
|
ipmi_smi_watcher_unregister(&driver_data.bmc_events); |
|
driver_unregister(&aem_driver.driver); |
|
list_for_each_entry_safe(p1, next1, &driver_data.aem_devices, list) |
|
aem_delete(p1); |
|
} |
|
|
|
MODULE_AUTHOR("Darrick J. Wong <[email protected]>"); |
|
MODULE_DESCRIPTION("IBM AEM power/temp/energy sensor driver"); |
|
MODULE_LICENSE("GPL"); |
|
|
|
module_init(aem_init); |
|
module_exit(aem_exit); |
|
|
|
MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3350-*"); |
|
MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3550-*"); |
|
MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3650-*"); |
|
MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3655-*"); |
|
MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3755-*"); |
|
MODULE_ALIAS("dmi:bvnIBM:*:pnIBM3850M2/x3950M2-*"); |
|
MODULE_ALIAS("dmi:bvnIBM:*:pnIBMBladeHC10-*");
|
|
|