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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
600 lines
14 KiB
C
600 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* A hwmon driver for the IBM PowerExecutive temperature/power sensors
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* Copyright (C) 2007 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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#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/slab.h>
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#include <linux/err.h>
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#define REFRESH_INTERVAL (2 * HZ)
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#define DRVNAME "ibmpex"
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#define PEX_GET_VERSION 1
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#define PEX_GET_SENSOR_COUNT 2
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#define PEX_GET_SENSOR_NAME 3
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#define PEX_RESET_HIGH_LOW 4
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#define PEX_GET_SENSOR_DATA 6
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#define PEX_NET_FUNCTION 0x3A
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#define PEX_COMMAND 0x3C
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static inline u16 extract_value(const char *data, int offset)
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{
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return be16_to_cpup((__be16 *)&data[offset]);
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}
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#define TEMP_SENSOR 1
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#define POWER_SENSOR 2
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#define PEX_SENSOR_TYPE_LEN 3
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static u8 const power_sensor_sig[] = {0x70, 0x77, 0x72};
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static u8 const temp_sensor_sig[] = {0x74, 0x65, 0x6D};
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#define PEX_MULT_LEN 2
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static u8 const watt_sensor_sig[] = {0x41, 0x43};
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#define PEX_NUM_SENSOR_FUNCS 3
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static const char * const sensor_name_suffixes[] = {
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"",
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"_lowest",
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"_highest"
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};
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static void ibmpex_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data);
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static void ibmpex_register_bmc(int iface, struct device *dev);
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static void ibmpex_bmc_gone(int iface);
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struct ibmpex_sensor_data {
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int in_use;
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s16 values[PEX_NUM_SENSOR_FUNCS];
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int multiplier;
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struct sensor_device_attribute_2 attr[PEX_NUM_SENSOR_FUNCS];
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};
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struct ibmpex_bmc_data {
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struct list_head list;
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struct device *hwmon_dev;
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struct device *bmc_device;
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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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struct ipmi_addr address;
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struct completion read_complete;
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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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unsigned char tx_msg_data[IPMI_MAX_MSG_LENGTH];
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long tx_msgid;
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unsigned char rx_msg_data[IPMI_MAX_MSG_LENGTH];
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unsigned long rx_msg_len;
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unsigned char rx_result;
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int rx_recv_type;
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unsigned char sensor_major;
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unsigned char sensor_minor;
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unsigned char num_sensors;
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struct ibmpex_sensor_data *sensors;
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};
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struct ibmpex_driver_data {
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struct list_head bmc_data;
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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 struct ibmpex_driver_data driver_data = {
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.bmc_data = LIST_HEAD_INIT(driver_data.bmc_data),
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.bmc_events = {
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.owner = THIS_MODULE,
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.new_smi = ibmpex_register_bmc,
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.smi_gone = ibmpex_bmc_gone,
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},
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.ipmi_hndlrs = {
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.ipmi_recv_hndl = ibmpex_msg_handler,
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},
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};
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static int ibmpex_send_message(struct ibmpex_bmc_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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static int ibmpex_ver_check(struct ibmpex_bmc_data *data)
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{
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data->tx_msg_data[0] = PEX_GET_VERSION;
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data->tx_message.data_len = 1;
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ibmpex_send_message(data);
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wait_for_completion(&data->read_complete);
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if (data->rx_result || data->rx_msg_len != 6)
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return -ENOENT;
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data->sensor_major = data->rx_msg_data[0];
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data->sensor_minor = data->rx_msg_data[1];
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dev_info(data->bmc_device,
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"Found BMC with sensor interface v%d.%d %d-%02d-%02d on interface %d\n",
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data->sensor_major,
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data->sensor_minor,
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extract_value(data->rx_msg_data, 2),
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data->rx_msg_data[4],
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data->rx_msg_data[5],
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data->interface);
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return 0;
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}
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static int ibmpex_query_sensor_count(struct ibmpex_bmc_data *data)
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{
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data->tx_msg_data[0] = PEX_GET_SENSOR_COUNT;
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data->tx_message.data_len = 1;
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ibmpex_send_message(data);
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wait_for_completion(&data->read_complete);
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if (data->rx_result || data->rx_msg_len != 1)
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return -ENOENT;
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return data->rx_msg_data[0];
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}
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static int ibmpex_query_sensor_name(struct ibmpex_bmc_data *data, int sensor)
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{
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data->tx_msg_data[0] = PEX_GET_SENSOR_NAME;
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data->tx_msg_data[1] = sensor;
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data->tx_message.data_len = 2;
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ibmpex_send_message(data);
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wait_for_completion(&data->read_complete);
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if (data->rx_result || data->rx_msg_len < 1)
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return -ENOENT;
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return 0;
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}
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static int ibmpex_query_sensor_data(struct ibmpex_bmc_data *data, int sensor)
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{
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data->tx_msg_data[0] = PEX_GET_SENSOR_DATA;
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data->tx_msg_data[1] = sensor;
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data->tx_message.data_len = 2;
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ibmpex_send_message(data);
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wait_for_completion(&data->read_complete);
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if (data->rx_result || data->rx_msg_len < 26) {
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dev_err(data->bmc_device, "Error reading sensor %d.\n",
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sensor);
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return -ENOENT;
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}
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return 0;
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}
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static int ibmpex_reset_high_low_data(struct ibmpex_bmc_data *data)
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{
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data->tx_msg_data[0] = PEX_RESET_HIGH_LOW;
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data->tx_message.data_len = 1;
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ibmpex_send_message(data);
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wait_for_completion(&data->read_complete);
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return 0;
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}
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static void ibmpex_update_device(struct ibmpex_bmc_data *data)
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{
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int i, err;
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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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for (i = 0; i < data->num_sensors; i++) {
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if (!data->sensors[i].in_use)
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continue;
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err = ibmpex_query_sensor_data(data, i);
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if (err)
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continue;
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data->sensors[i].values[0] =
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extract_value(data->rx_msg_data, 16);
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data->sensors[i].values[1] =
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extract_value(data->rx_msg_data, 18);
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data->sensors[i].values[2] =
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extract_value(data->rx_msg_data, 20);
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}
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data->last_updated = jiffies;
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data->valid = 1;
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out:
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mutex_unlock(&data->lock);
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}
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static struct ibmpex_bmc_data *get_bmc_data(int iface)
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{
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struct ibmpex_bmc_data *p, *next;
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list_for_each_entry_safe(p, next, &driver_data.bmc_data, list)
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if (p->interface == iface)
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return p;
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return NULL;
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}
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static ssize_t name_show(struct device *dev, struct device_attribute *devattr,
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char *buf)
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{
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return sprintf(buf, "%s\n", DRVNAME);
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}
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static SENSOR_DEVICE_ATTR_RO(name, name, 0);
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static ssize_t ibmpex_show_sensor(struct device *dev,
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struct device_attribute *devattr,
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char *buf)
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{
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struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
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struct ibmpex_bmc_data *data = dev_get_drvdata(dev);
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int mult = data->sensors[attr->index].multiplier;
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ibmpex_update_device(data);
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return sprintf(buf, "%d\n",
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data->sensors[attr->index].values[attr->nr] * mult);
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}
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static ssize_t ibmpex_high_low_store(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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{
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struct ibmpex_bmc_data *data = dev_get_drvdata(dev);
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ibmpex_reset_high_low_data(data);
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return count;
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}
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static SENSOR_DEVICE_ATTR_WO(reset_high_low, ibmpex_high_low, 0);
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static int is_power_sensor(const char *sensor_id, int len)
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{
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if (len < PEX_SENSOR_TYPE_LEN)
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return 0;
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if (!memcmp(sensor_id, power_sensor_sig, PEX_SENSOR_TYPE_LEN))
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return 1;
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return 0;
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}
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static int is_temp_sensor(const char *sensor_id, int len)
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{
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if (len < PEX_SENSOR_TYPE_LEN)
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return 0;
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if (!memcmp(sensor_id, temp_sensor_sig, PEX_SENSOR_TYPE_LEN))
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return 1;
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return 0;
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}
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static int power_sensor_multiplier(struct ibmpex_bmc_data *data,
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const char *sensor_id, int len)
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{
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int i;
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if (data->sensor_major == 2)
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return 1000000;
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for (i = PEX_SENSOR_TYPE_LEN; i < len - 1; i++)
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if (!memcmp(&sensor_id[i], watt_sensor_sig, PEX_MULT_LEN))
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return 1000000;
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return 100000;
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}
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static int create_sensor(struct ibmpex_bmc_data *data, int type,
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int counter, int sensor, int func)
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{
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int err;
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char *n;
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n = kmalloc(32, GFP_KERNEL);
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if (!n)
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return -ENOMEM;
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if (type == TEMP_SENSOR)
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sprintf(n, "temp%d_input%s",
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counter, sensor_name_suffixes[func]);
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else if (type == POWER_SENSOR)
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sprintf(n, "power%d_average%s",
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counter, sensor_name_suffixes[func]);
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sysfs_attr_init(&data->sensors[sensor].attr[func].dev_attr.attr);
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data->sensors[sensor].attr[func].dev_attr.attr.name = n;
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data->sensors[sensor].attr[func].dev_attr.attr.mode = 0444;
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data->sensors[sensor].attr[func].dev_attr.show = ibmpex_show_sensor;
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data->sensors[sensor].attr[func].index = sensor;
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data->sensors[sensor].attr[func].nr = func;
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err = device_create_file(data->bmc_device,
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&data->sensors[sensor].attr[func].dev_attr);
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if (err) {
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data->sensors[sensor].attr[func].dev_attr.attr.name = NULL;
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kfree(n);
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return err;
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}
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return 0;
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}
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static int ibmpex_find_sensors(struct ibmpex_bmc_data *data)
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{
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int i, j, err;
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int sensor_type;
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int sensor_counter;
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int num_power = 0;
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int num_temp = 0;
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err = ibmpex_query_sensor_count(data);
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if (err <= 0)
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return -ENOENT;
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data->num_sensors = err;
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data->sensors = kcalloc(data->num_sensors, sizeof(*data->sensors),
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GFP_KERNEL);
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if (!data->sensors)
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return -ENOMEM;
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for (i = 0; i < data->num_sensors; i++) {
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err = ibmpex_query_sensor_name(data, i);
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if (err)
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continue;
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if (is_power_sensor(data->rx_msg_data, data->rx_msg_len)) {
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sensor_type = POWER_SENSOR;
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num_power++;
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sensor_counter = num_power;
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data->sensors[i].multiplier =
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power_sensor_multiplier(data,
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data->rx_msg_data,
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data->rx_msg_len);
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} else if (is_temp_sensor(data->rx_msg_data,
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data->rx_msg_len)) {
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sensor_type = TEMP_SENSOR;
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num_temp++;
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sensor_counter = num_temp;
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data->sensors[i].multiplier = 1000;
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} else
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continue;
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data->sensors[i].in_use = 1;
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/* Create attributes */
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for (j = 0; j < PEX_NUM_SENSOR_FUNCS; j++) {
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err = create_sensor(data, sensor_type, sensor_counter,
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i, j);
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if (err)
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goto exit_remove;
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}
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}
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err = device_create_file(data->bmc_device,
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&sensor_dev_attr_reset_high_low.dev_attr);
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if (err)
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goto exit_remove;
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err = device_create_file(data->bmc_device,
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&sensor_dev_attr_name.dev_attr);
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if (err)
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goto exit_remove;
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return 0;
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exit_remove:
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device_remove_file(data->bmc_device,
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&sensor_dev_attr_reset_high_low.dev_attr);
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device_remove_file(data->bmc_device, &sensor_dev_attr_name.dev_attr);
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for (i = 0; i < data->num_sensors; i++)
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for (j = 0; j < PEX_NUM_SENSOR_FUNCS; j++) {
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if (!data->sensors[i].attr[j].dev_attr.attr.name)
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continue;
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device_remove_file(data->bmc_device,
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&data->sensors[i].attr[j].dev_attr);
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kfree(data->sensors[i].attr[j].dev_attr.attr.name);
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}
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kfree(data->sensors);
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return err;
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}
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static void ibmpex_register_bmc(int iface, struct device *dev)
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{
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struct ibmpex_bmc_data *data;
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int err;
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data = kzalloc(sizeof(*data), GFP_KERNEL);
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if (!data)
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return;
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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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data->bmc_device = dev;
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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(dev,
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"Unable to register user with IPMI interface %d\n",
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data->interface);
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goto out;
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}
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mutex_init(&data->lock);
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/* Initialize message */
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data->tx_msgid = 0;
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init_completion(&data->read_complete);
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data->tx_message.netfn = PEX_NET_FUNCTION;
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data->tx_message.cmd = PEX_COMMAND;
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data->tx_message.data = data->tx_msg_data;
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/* Does this BMC support PowerExecutive? */
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err = ibmpex_ver_check(data);
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if (err)
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goto out_user;
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/* Register the BMC as a HWMON class device */
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data->hwmon_dev = hwmon_device_register(data->bmc_device);
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if (IS_ERR(data->hwmon_dev)) {
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dev_err(data->bmc_device,
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"Unable to register hwmon device for IPMI interface %d\n",
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data->interface);
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goto out_user;
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}
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/* finally add the new bmc data to the bmc data list */
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dev_set_drvdata(dev, data);
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list_add_tail(&data->list, &driver_data.bmc_data);
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/* Now go find all the sensors */
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err = ibmpex_find_sensors(data);
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if (err) {
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dev_err(data->bmc_device, "Error %d finding sensors\n", err);
|
|
goto out_register;
|
|
}
|
|
|
|
return;
|
|
|
|
out_register:
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
out_user:
|
|
ipmi_destroy_user(data->user);
|
|
out:
|
|
kfree(data);
|
|
}
|
|
|
|
static void ibmpex_bmc_delete(struct ibmpex_bmc_data *data)
|
|
{
|
|
int i, j;
|
|
|
|
device_remove_file(data->bmc_device,
|
|
&sensor_dev_attr_reset_high_low.dev_attr);
|
|
device_remove_file(data->bmc_device, &sensor_dev_attr_name.dev_attr);
|
|
for (i = 0; i < data->num_sensors; i++)
|
|
for (j = 0; j < PEX_NUM_SENSOR_FUNCS; j++) {
|
|
if (!data->sensors[i].attr[j].dev_attr.attr.name)
|
|
continue;
|
|
device_remove_file(data->bmc_device,
|
|
&data->sensors[i].attr[j].dev_attr);
|
|
kfree(data->sensors[i].attr[j].dev_attr.attr.name);
|
|
}
|
|
|
|
list_del(&data->list);
|
|
dev_set_drvdata(data->bmc_device, NULL);
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
ipmi_destroy_user(data->user);
|
|
kfree(data->sensors);
|
|
kfree(data);
|
|
}
|
|
|
|
static void ibmpex_bmc_gone(int iface)
|
|
{
|
|
struct ibmpex_bmc_data *data = get_bmc_data(iface);
|
|
|
|
if (!data)
|
|
return;
|
|
|
|
ibmpex_bmc_delete(data);
|
|
}
|
|
|
|
static void ibmpex_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data)
|
|
{
|
|
struct ibmpex_bmc_data *data = (struct ibmpex_bmc_data *)user_msg_data;
|
|
|
|
if (msg->msgid != data->tx_msgid) {
|
|
dev_err(data->bmc_device,
|
|
"Mismatch between received msgid (%02x) and transmitted msgid (%02x)!\n",
|
|
(int)msg->msgid,
|
|
(int)data->tx_msgid);
|
|
ipmi_free_recv_msg(msg);
|
|
return;
|
|
}
|
|
|
|
data->rx_recv_type = msg->recv_type;
|
|
if (msg->msg.data_len > 0)
|
|
data->rx_result = msg->msg.data[0];
|
|
else
|
|
data->rx_result = IPMI_UNKNOWN_ERR_COMPLETION_CODE;
|
|
|
|
if (msg->msg.data_len > 1) {
|
|
data->rx_msg_len = msg->msg.data_len - 1;
|
|
memcpy(data->rx_msg_data, msg->msg.data + 1, data->rx_msg_len);
|
|
} else
|
|
data->rx_msg_len = 0;
|
|
|
|
ipmi_free_recv_msg(msg);
|
|
complete(&data->read_complete);
|
|
}
|
|
|
|
static int __init ibmpex_init(void)
|
|
{
|
|
return ipmi_smi_watcher_register(&driver_data.bmc_events);
|
|
}
|
|
|
|
static void __exit ibmpex_exit(void)
|
|
{
|
|
struct ibmpex_bmc_data *p, *next;
|
|
|
|
ipmi_smi_watcher_unregister(&driver_data.bmc_events);
|
|
list_for_each_entry_safe(p, next, &driver_data.bmc_data, list)
|
|
ibmpex_bmc_delete(p);
|
|
}
|
|
|
|
MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>");
|
|
MODULE_DESCRIPTION("IBM PowerExecutive power/temperature sensor driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(ibmpex_init);
|
|
module_exit(ibmpex_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-*");
|