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![Julia Lawall](/assets/img/avatar_default.png)
The aem_rw_sensor_template and aem_ro_sensor_template structures are never modified, so declare them as const. Done with the help of Coccinelle. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
1117 lines
27 KiB
C
1117 lines
27 KiB
C
/*
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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 <darrick.wong@oracle.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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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ipmi_user_t 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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/* 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[0];
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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data->tx_message.cmd = AEM_FIND_FW_CMD;
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data->tx_message.data = (char *)&ff_req;
|
|
data->tx_message.data_len = sizeof(ff_req);
|
|
|
|
data->rx_msg_data = &ff_resp;
|
|
data->rx_msg_len = sizeof(ff_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(ff_resp) ||
|
|
memcmp(&ff_resp.id, &system_x_id, sizeof(system_x_id)))
|
|
return -ENOENT;
|
|
|
|
return ff_resp.num_instances;
|
|
}
|
|
|
|
/* Find and initialize one AEM1 instance */
|
|
static int aem_init_aem1_inst(struct aem_ipmi_data *probe, u8 module_handle)
|
|
{
|
|
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 = 1;
|
|
data->ver_minor = 0;
|
|
data->module_handle = module_handle;
|
|
for (i = 0; i < AEM1_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_aem1_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 = aem1_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 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 show_name(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(name, S_IRUGO, show_name, NULL, 0);
|
|
|
|
/* AEM device version */
|
|
static ssize_t show_version(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(version, S_IRUGO, show_version, NULL, 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 = S_IRUGO;
|
|
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 = S_IRUGO | S_IWUSR;
|
|
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 <darrick.wong@oracle.com>");
|
|
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-*");
|