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drivers/hwmon/ibmaem.c
26.3 KB
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// 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) * temperature/power/energy sensors and capping functionality. |
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* Copyright (C) 2008 IBM * |
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* Author: Darrick J. Wong <darrick.wong@oracle.com> |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/ipmi.h> #include <linux/module.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/jiffies.h> #include <linux/mutex.h> #include <linux/kdev_t.h> #include <linux/spinlock.h> #include <linux/idr.h> |
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#include <linux/slab.h> |
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#include <linux/sched.h> #include <linux/platform_device.h> #include <linux/math64.h> #include <linux/time.h> |
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#include <linux/err.h> |
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#define REFRESH_INTERVAL (HZ) #define IPMI_TIMEOUT (30 * HZ) #define DRVNAME "aem" #define AEM_NETFN 0x2E #define AEM_FIND_FW_CMD 0x80 #define AEM_ELEMENT_CMD 0x81 #define AEM_FW_INSTANCE_CMD 0x82 #define AEM_READ_ELEMENT_CFG 0x80 #define AEM_READ_BUFFER 0x81 #define AEM_READ_REGISTER 0x82 #define AEM_WRITE_REGISTER 0x83 #define AEM_SET_REG_MASK 0x84 #define AEM_CLEAR_REG_MASK 0x85 #define AEM_READ_ELEMENT_CFG2 0x86 #define AEM_CONTROL_ELEMENT 0 #define AEM_ENERGY_ELEMENT 1 #define AEM_CLOCK_ELEMENT 4 #define AEM_POWER_CAP_ELEMENT 7 #define AEM_EXHAUST_ELEMENT 9 #define AEM_POWER_ELEMENT 10 #define AEM_MODULE_TYPE_ID 0x0001 #define AEM2_NUM_ENERGY_REGS 2 #define AEM2_NUM_PCAP_REGS 6 #define AEM2_NUM_TEMP_REGS 2 #define AEM2_NUM_SENSORS 14 #define AEM1_NUM_ENERGY_REGS 1 #define AEM1_NUM_SENSORS 3 /* AEM 2.x has more energy registers */ #define AEM_NUM_ENERGY_REGS AEM2_NUM_ENERGY_REGS /* AEM 2.x needs more sensor files */ #define AEM_NUM_SENSORS AEM2_NUM_SENSORS #define POWER_CAP 0 #define POWER_CAP_MAX_HOTPLUG 1 #define POWER_CAP_MAX 2 #define POWER_CAP_MIN_WARNING 3 #define POWER_CAP_MIN 4 #define POWER_AUX 5 #define AEM_DEFAULT_POWER_INTERVAL 1000 #define AEM_MIN_POWER_INTERVAL 200 #define UJ_PER_MJ 1000L |
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static DEFINE_IDA(aem_ida); |
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static struct platform_driver aem_driver = { .driver = { .name = DRVNAME, .bus = &platform_bus_type, } |
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}; struct aem_ipmi_data { struct completion read_complete; struct ipmi_addr address; |
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struct ipmi_user *user; |
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int interface; struct kernel_ipmi_msg tx_message; long tx_msgid; void *rx_msg_data; unsigned short rx_msg_len; unsigned char rx_result; int rx_recv_type; struct device *bmc_device; }; struct aem_ro_sensor_template { char *label; ssize_t (*show)(struct device *dev, struct device_attribute *devattr, char *buf); int index; }; struct aem_rw_sensor_template { char *label; ssize_t (*show)(struct device *dev, struct device_attribute *devattr, char *buf); ssize_t (*set)(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count); int index; }; struct aem_data { struct list_head list; struct device *hwmon_dev; struct platform_device *pdev; struct mutex lock; char valid; unsigned long last_updated; /* In jiffies */ u8 ver_major; u8 ver_minor; u8 module_handle; int id; 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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/* * AEM 1.x sensors: * Available sensors: * Energy meter * Power meter * * AEM 2.x sensors: * Two energy meters * Two power meters * Two temperature sensors * Six power cap registers */ /* sysfs attrs */ struct sensor_device_attribute sensors[AEM_NUM_SENSORS]; /* energy use in mJ */ u64 energy[AEM_NUM_ENERGY_REGS]; /* power sampling interval in ms */ unsigned long power_period[AEM_NUM_ENERGY_REGS]; /* Everything past here is for AEM2 only */ /* power caps in dW */ u16 pcap[AEM2_NUM_PCAP_REGS]; /* exhaust temperature in C */ u8 temp[AEM2_NUM_TEMP_REGS]; }; /* Data structures returned by the AEM firmware */ struct aem_iana_id { u8 bytes[3]; }; static struct aem_iana_id system_x_id = { .bytes = {0x4D, 0x4F, 0x00} }; /* These are used to find AEM1 instances */ struct aem_find_firmware_req { struct aem_iana_id id; u8 rsvd; |
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__be16 index; __be16 module_type_id; |
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} __packed; struct aem_find_firmware_resp { struct aem_iana_id id; u8 num_instances; } __packed; /* These are used to find AEM2 instances */ struct aem_find_instance_req { struct aem_iana_id id; u8 instance_number; |
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__be16 module_type_id; |
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} __packed; struct aem_find_instance_resp { struct aem_iana_id id; u8 num_instances; u8 major; u8 minor; u8 module_handle; u16 record_id; } __packed; /* These are used to query sensors */ struct aem_read_sensor_req { struct aem_iana_id id; u8 module_handle; u8 element; u8 subcommand; u8 reg; u8 rx_buf_size; } __packed; struct aem_read_sensor_resp { struct aem_iana_id id; u8 bytes[0]; } __packed; /* Data structures to talk to the IPMI layer */ struct aem_driver_data { struct list_head aem_devices; struct ipmi_smi_watcher bmc_events; struct ipmi_user_hndl ipmi_hndlrs; }; static void aem_register_bmc(int iface, struct device *dev); static void aem_bmc_gone(int iface); static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data); static void aem_remove_sensors(struct aem_data *data); |
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static int aem1_find_sensors(struct aem_data *data); static int aem2_find_sensors(struct aem_data *data); static void update_aem1_sensors(struct aem_data *data); static void update_aem2_sensors(struct aem_data *data); static struct aem_driver_data driver_data = { .aem_devices = LIST_HEAD_INIT(driver_data.aem_devices), .bmc_events = { .owner = THIS_MODULE, .new_smi = aem_register_bmc, .smi_gone = aem_bmc_gone, }, .ipmi_hndlrs = { .ipmi_recv_hndl = aem_msg_handler, }, }; /* Functions to talk to the IPMI layer */ /* Initialize IPMI address, message buffers and user data */ static int aem_init_ipmi_data(struct aem_ipmi_data *data, int iface, struct device *bmc) { int err; init_completion(&data->read_complete); data->bmc_device = bmc; /* Initialize IPMI address */ data->address.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; data->address.channel = IPMI_BMC_CHANNEL; data->address.data[0] = 0; data->interface = iface; /* Initialize message buffers */ data->tx_msgid = 0; data->tx_message.netfn = AEM_NETFN; /* Create IPMI messaging interface user */ err = ipmi_create_user(data->interface, &driver_data.ipmi_hndlrs, data, &data->user); if (err < 0) { |
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dev_err(bmc, "Unable to register user with IPMI interface %d ", data->interface); |
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return err; |
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} return 0; } /* Send an IPMI command */ static int aem_send_message(struct aem_ipmi_data *data) { int err; err = ipmi_validate_addr(&data->address, sizeof(data->address)); if (err) goto out; data->tx_msgid++; err = ipmi_request_settime(data->user, &data->address, data->tx_msgid, &data->tx_message, data, 0, 0, 0); if (err) goto out1; return 0; out1: dev_err(data->bmc_device, "request_settime=%x ", err); return err; out: dev_err(data->bmc_device, "validate_addr=%x ", err); return err; } /* Dispatch IPMI messages to callers */ static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data) { unsigned short rx_len; struct aem_ipmi_data *data = user_msg_data; if (msg->msgid != data->tx_msgid) { |
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dev_err(data->bmc_device, "Mismatch between received msgid (%02x) and transmitted msgid (%02x)! ", |
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(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) { rx_len = msg->msg.data_len - 1; if (data->rx_msg_len < rx_len) rx_len = data->rx_msg_len; data->rx_msg_len = rx_len; 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); } |
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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, void *buf, size_t size) { int rs_size, res; struct aem_read_sensor_req rs_req; |
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/* Use preallocated rx buffer */ struct aem_read_sensor_resp *rs_resp = data->rs_resp; |
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struct aem_ipmi_data *ipmi = &data->ipmi; /* AEM registers are 1, 2, 4 or 8 bytes */ switch (size) { case 1: case 2: case 4: case 8: break; default: return -EINVAL; } rs_req.id = system_x_id; rs_req.module_handle = data->module_handle; rs_req.element = elt; rs_req.subcommand = AEM_READ_REGISTER; rs_req.reg = reg; rs_req.rx_buf_size = size; ipmi->tx_message.cmd = AEM_ELEMENT_CMD; ipmi->tx_message.data = (char *)&rs_req; ipmi->tx_message.data_len = sizeof(rs_req); rs_size = sizeof(*rs_resp) + size; |
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ipmi->rx_msg_data = rs_resp; ipmi->rx_msg_len = rs_size; aem_send_message(ipmi); res = wait_for_completion_timeout(&ipmi->read_complete, IPMI_TIMEOUT); |
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if (!res) { res = -ETIMEDOUT; goto out; } |
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if (ipmi->rx_result || ipmi->rx_msg_len != rs_size || memcmp(&rs_resp->id, &system_x_id, sizeof(system_x_id))) { |
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res = -ENOENT; goto out; |
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} switch (size) { case 1: { u8 *x = buf; *x = rs_resp->bytes[0]; break; } case 2: { u16 *x = buf; |
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*x = be16_to_cpup((__be16 *)rs_resp->bytes); |
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break; } case 4: { u32 *x = buf; |
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*x = be32_to_cpup((__be32 *)rs_resp->bytes); |
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break; } case 8: { u64 *x = buf; |
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*x = be64_to_cpup((__be64 *)rs_resp->bytes); |
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break; } } |
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res = 0; |
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out: |
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return res; |
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} /* Update AEM energy registers */ |
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static void update_aem_energy_one(struct aem_data *data, int which) { aem_read_sensor(data, AEM_ENERGY_ELEMENT, which, &data->energy[which], 8); } |
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static void update_aem_energy(struct aem_data *data) { |
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update_aem_energy_one(data, 0); |
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if (data->ver_major < 2) return; |
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update_aem_energy_one(data, 1); |
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} /* Update all AEM1 sensors */ static void update_aem1_sensors(struct aem_data *data) { mutex_lock(&data->lock); if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) && data->valid) goto out; update_aem_energy(data); out: mutex_unlock(&data->lock); } /* Update all AEM2 sensors */ static void update_aem2_sensors(struct aem_data *data) { int i; mutex_lock(&data->lock); if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) && data->valid) goto out; update_aem_energy(data); aem_read_sensor(data, AEM_EXHAUST_ELEMENT, 0, &data->temp[0], 1); aem_read_sensor(data, AEM_EXHAUST_ELEMENT, 1, &data->temp[1], 1); for (i = POWER_CAP; i <= POWER_AUX; i++) aem_read_sensor(data, AEM_POWER_CAP_ELEMENT, i, &data->pcap[i], 2); out: mutex_unlock(&data->lock); } /* Delete an AEM instance */ static void aem_delete(struct aem_data *data) { list_del(&data->list); aem_remove_sensors(data); |
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kfree(data->rs_resp); |
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hwmon_device_unregister(data->hwmon_dev); 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); } /* Probe functions for AEM1 devices */ /* Retrieve version and module handle for an AEM1 instance */ static int aem_find_aem1_count(struct aem_ipmi_data *data) { int res; struct aem_find_firmware_req ff_req; struct aem_find_firmware_resp ff_resp; ff_req.id = system_x_id; ff_req.index = 0; ff_req.module_type_id = cpu_to_be16(AEM_MODULE_TYPE_ID); data->tx_message.cmd = AEM_FIND_FW_CMD; 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 */ |
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data->id = ida_simple_get(&aem_ida, 0, 0, GFP_KERNEL); if (data->id < 0) |
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goto id_err; data->pdev = platform_device_alloc(DRVNAME, data->id); if (!data->pdev) goto dev_err; |
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data->pdev->dev.driver = &aem_driver.driver; |
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res = platform_device_add(data->pdev); if (res) 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, probe->bmc_device); if (res) |
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goto ipmi_err; /* Register with hwmon */ 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, "Unable to register hwmon device for IPMI interface %d ", |
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probe->interface); |
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res = PTR_ERR(data->hwmon_dev); |
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goto hwmon_reg_err; } data->update = update_aem1_sensors; |
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data->rs_resp = kzalloc(sizeof(*(data->rs_resp)) + 8, GFP_KERNEL); if (!data->rs_resp) { res = -ENOMEM; goto alloc_resp_err; } |
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/* Find sensors */ |
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res = aem1_find_sensors(data); if (res) |
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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 ", data->ver_major, data->ver_minor, data->module_handle); return 0; sensor_err: |
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kfree(data->rs_resp); alloc_resp_err: |
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hwmon_device_unregister(data->hwmon_dev); hwmon_reg_err: ipmi_destroy_user(data->ipmi.user); ipmi_err: |
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platform_set_drvdata(data->pdev, NULL); |
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platform_device_unregister(data->pdev); dev_err: |
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ida_simple_remove(&aem_ida, data->id); |
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id_err: kfree(data); return res; } /* Find and initialize all AEM1 instances */ |
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static void aem_init_aem1(struct aem_ipmi_data *probe) |
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{ 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 ", err, i); |
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} } |
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} /* 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) || |
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memcmp(&fi_resp->id, &system_x_id, sizeof(system_x_id)) || fi_resp->num_instances <= instance_num) |
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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 */ |
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data->id = ida_simple_get(&aem_ida, 0, 0, GFP_KERNEL); if (data->id < 0) |
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goto id_err; data->pdev = platform_device_alloc(DRVNAME, data->id); if (!data->pdev) goto dev_err; |
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data->pdev->dev.driver = &aem_driver.driver; |
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res = platform_device_add(data->pdev); if (res) 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, probe->bmc_device); if (res) |
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goto ipmi_err; /* Register with hwmon */ 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, "Unable to register hwmon device for IPMI interface %d ", |
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probe->interface); |
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708 |
res = PTR_ERR(data->hwmon_dev); |
8808a793f
|
709 710 711 712 |
goto hwmon_reg_err; } data->update = update_aem2_sensors; |
da8ebe4e0
|
713 714 715 716 717 |
data->rs_resp = kzalloc(sizeof(*(data->rs_resp)) + 8, GFP_KERNEL); if (!data->rs_resp) { res = -ENOMEM; goto alloc_resp_err; } |
8808a793f
|
718 719 |
/* Find sensors */ |
547a1c99d
|
720 721 |
res = aem2_find_sensors(data); if (res) |
8808a793f
|
722 723 724 725 726 727 728 729 730 731 732 733 |
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 ", data->ver_major, data->ver_minor, data->module_handle); return 0; sensor_err: |
da8ebe4e0
|
734 735 |
kfree(data->rs_resp); alloc_resp_err: |
8808a793f
|
736 737 738 739 |
hwmon_device_unregister(data->hwmon_dev); hwmon_reg_err: ipmi_destroy_user(data->ipmi.user); ipmi_err: |
95de3b257
|
740 |
platform_set_drvdata(data->pdev, NULL); |
8808a793f
|
741 742 |
platform_device_unregister(data->pdev); dev_err: |
658070447
|
743 |
ida_simple_remove(&aem_ida, data->id); |
8808a793f
|
744 745 746 747 748 749 750 |
id_err: kfree(data); return res; } /* Find and initialize all AEM2 instances */ |
9d84c9e8b
|
751 |
static void aem_init_aem2(struct aem_ipmi_data *probe) |
8808a793f
|
752 753 754 755 756 757 758 |
{ 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) { |
b55f37572
|
759 760 761 |
dev_err(probe->bmc_device, "Unknown AEM v%d; please report this to the maintainer. ", |
8808a793f
|
762 763 764 765 766 767 768 769 770 771 |
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 ", err, fi_resp.module_handle); |
8808a793f
|
772 773 774 |
} i++; } |
8808a793f
|
775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 |
} /* 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 */ |
f6861c0ee
|
805 |
static ssize_t name_show(struct device *dev, struct device_attribute *devattr, |
8808a793f
|
806 807 808 809 810 811 812 |
char *buf) { struct aem_data *data = dev_get_drvdata(dev); return sprintf(buf, "%s%d ", DRVNAME, data->ver_major); } |
f6861c0ee
|
813 |
static SENSOR_DEVICE_ATTR_RO(name, name, 0); |
8808a793f
|
814 815 |
/* AEM device version */ |
f6861c0ee
|
816 817 |
static ssize_t version_show(struct device *dev, struct device_attribute *devattr, char *buf) |
8808a793f
|
818 819 820 821 822 823 |
{ struct aem_data *data = dev_get_drvdata(dev); return sprintf(buf, "%d.%d ", data->ver_major, data->ver_minor); } |
f6861c0ee
|
824 |
static SENSOR_DEVICE_ATTR_RO(version, version, 0); |
8808a793f
|
825 826 827 828 829 830 831 832 833 834 |
/* 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; |
8808a793f
|
835 836 |
mutex_lock(&data->lock); |
bb15e7f28
|
837 |
update_aem_energy_one(data, attr->index); |
d659f9b13
|
838 |
time = ktime_get_ns(); |
8808a793f
|
839 840 841 842 843 844 845 846 847 |
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; } |
bb15e7f28
|
848 |
update_aem_energy_one(data, attr->index); |
d659f9b13
|
849 |
time = ktime_get_ns() - time; |
8808a793f
|
850 851 |
after = data->energy[attr->index]; mutex_unlock(&data->lock); |
8808a793f
|
852 853 854 855 856 857 858 859 860 861 862 863 864 865 |
delta = (after - before) * UJ_PER_MJ; return sprintf(buf, "%llu ", (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); |
bb15e7f28
|
866 867 868 |
mutex_lock(&a->lock); update_aem_energy_one(a, attr->index); mutex_unlock(&a->lock); |
8808a793f
|
869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 |
return sprintf(buf, "%llu ", (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 ", 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; |
179c4fdb5
|
897 |
res = kstrtoul(buf, 10, &temp); |
8808a793f
|
898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 |
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, |
449278d92
|
913 914 |
const struct aem_ro_sensor_template *ro, const struct aem_rw_sensor_template *rw) |
8808a793f
|
915 916 917 918 919 920 921 |
{ struct device *dev = &data->pdev->dev; struct sensor_device_attribute *sensors = data->sensors; int err; /* Set up read-only sensors */ while (ro->label) { |
3cdb2052a
|
922 |
sysfs_attr_init(&sensors->dev_attr.attr); |
8808a793f
|
923 |
sensors->dev_attr.attr.name = ro->label; |
f6861c0ee
|
924 |
sensors->dev_attr.attr.mode = 0444; |
8808a793f
|
925 926 927 928 929 930 931 932 933 934 935 936 937 938 |
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) { |
3cdb2052a
|
939 |
sysfs_attr_init(&sensors->dev_attr.attr); |
8808a793f
|
940 |
sensors->dev_attr.attr.name = rw->label; |
f6861c0ee
|
941 |
sensors->dev_attr.attr.mode = 0644; |
8808a793f
|
942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 |
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 ", 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 ", 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 */ |
449278d92
|
1015 |
static const struct aem_ro_sensor_template aem1_ro_sensors[] = { |
8808a793f
|
1016 1017 1018 1019 |
{"energy1_input", aem_show_energy, 0}, {"power1_average", aem_show_power, 0}, {NULL, NULL, 0}, }; |
449278d92
|
1020 |
static const struct aem_rw_sensor_template aem1_rw_sensors[] = { |
8808a793f
|
1021 1022 1023 1024 1025 |
{"power1_average_interval", aem_show_power_period, aem_set_power_period, 0}, {NULL, NULL, NULL, 0}, }; /* Description of AEM2 sensors */ |
449278d92
|
1026 |
static const struct aem_ro_sensor_template aem2_ro_sensors[] = { |
8808a793f
|
1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 |
{"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}, |
0910b28ef
|
1038 |
{"power3_average", aem2_show_pcap_value, POWER_AUX}, |
8808a793f
|
1039 1040 1041 |
{"power_cap", aem2_show_pcap_value, POWER_CAP}, {NULL, NULL, 0}, }; |
449278d92
|
1042 |
static const struct aem_rw_sensor_template aem2_rw_sensors[] = { |
8808a793f
|
1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 |
{"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; |
fe2d5ffc7
|
1065 |
res = driver_register(&aem_driver.driver); |
8808a793f
|
1066 |
if (res) { |
55d705cce
|
1067 1068 |
pr_err("Can't register aem driver "); |
8808a793f
|
1069 1070 1071 1072 1073 1074 1075 1076 1077 |
return res; } res = ipmi_smi_watcher_register(&driver_data.bmc_events); if (res) goto ipmi_reg_err; return 0; ipmi_reg_err: |
fe2d5ffc7
|
1078 |
driver_unregister(&aem_driver.driver); |
8808a793f
|
1079 1080 1081 1082 1083 1084 1085 1086 1087 |
return res; } static void __exit aem_exit(void) { struct aem_data *p1, *next1; ipmi_smi_watcher_unregister(&driver_data.bmc_events); |
fe2d5ffc7
|
1088 |
driver_unregister(&aem_driver.driver); |
8808a793f
|
1089 1090 1091 |
list_for_each_entry_safe(p1, next1, &driver_data.aem_devices, list) aem_delete(p1); } |
5407e0513
|
1092 |
MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>"); |
eb93b7df7
|
1093 |
MODULE_DESCRIPTION("IBM AEM power/temp/energy sensor driver"); |
8808a793f
|
1094 1095 1096 1097 |
MODULE_LICENSE("GPL"); module_init(aem_init); module_exit(aem_exit); |
21d93c14b
|
1098 1099 1100 1101 1102 1103 1104 |
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-*"); |
8070408b5
|
1105 |
MODULE_ALIAS("dmi:bvnIBM:*:pnIBMBladeHC10-*"); |