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Diffstat (limited to 'include/linux/ipmi.h')
| -rw-r--r-- | include/linux/ipmi.h | 602 |
1 files changed, 602 insertions, 0 deletions
diff --git a/include/linux/ipmi.h b/include/linux/ipmi.h new file mode 100644 index 000000000000..2ec265e1045f --- /dev/null +++ b/include/linux/ipmi.h @@ -0,0 +1,602 @@ +/* + * ipmi.h + * + * MontaVista IPMI interface + * + * Author: MontaVista Software, Inc. + * Corey Minyard <minyard@mvista.com> + * source@mvista.com + * + * Copyright 2002 MontaVista Software Inc. + * + * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR + * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE + * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * 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., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef __LINUX_IPMI_H +#define __LINUX_IPMI_H + +#include <linux/ipmi_msgdefs.h> + +/* + * This file describes an interface to an IPMI driver. You have to + * have a fairly good understanding of IPMI to use this, so go read + * the specs first before actually trying to do anything. + * + * With that said, this driver provides a multi-user interface to the + * IPMI driver, and it allows multiple IPMI physical interfaces below + * the driver. The physical interfaces bind as a lower layer on the + * driver. They appear as interfaces to the application using this + * interface. + * + * Multi-user means that multiple applications may use the driver, + * send commands, receive responses, etc. The driver keeps track of + * commands the user sends and tracks the responses. The responses + * will go back to the application that send the command. If the + * response doesn't come back in time, the driver will return a + * timeout error response to the application. Asynchronous events + * from the BMC event queue will go to all users bound to the driver. + * The incoming event queue in the BMC will automatically be flushed + * if it becomes full and it is queried once a second to see if + * anything is in it. Incoming commands to the driver will get + * delivered as commands. + * + * This driver provides two main interfaces: one for in-kernel + * applications and another for userland applications. The + * capabilities are basically the same for both interface, although + * the interfaces are somewhat different. The stuff in the + * #ifdef KERNEL below is the in-kernel interface. The userland + * interface is defined later in the file. */ + + + +/* + * This is an overlay for all the address types, so it's easy to + * determine the actual address type. This is kind of like addresses + * work for sockets. + */ +#define IPMI_MAX_ADDR_SIZE 32 +struct ipmi_addr +{ + /* Try to take these from the "Channel Medium Type" table + in section 6.5 of the IPMI 1.5 manual. */ + int addr_type; + short channel; + char data[IPMI_MAX_ADDR_SIZE]; +}; + +/* + * When the address is not used, the type will be set to this value. + * The channel is the BMC's channel number for the channel (usually + * 0), or IPMC_BMC_CHANNEL if communicating directly with the BMC. + */ +#define IPMI_SYSTEM_INTERFACE_ADDR_TYPE 0x0c +struct ipmi_system_interface_addr +{ + int addr_type; + short channel; + unsigned char lun; +}; + +/* An IPMB Address. */ +#define IPMI_IPMB_ADDR_TYPE 0x01 +/* Used for broadcast get device id as described in section 17.9 of the + IPMI 1.5 manual. */ +#define IPMI_IPMB_BROADCAST_ADDR_TYPE 0x41 +struct ipmi_ipmb_addr +{ + int addr_type; + short channel; + unsigned char slave_addr; + unsigned char lun; +}; + +/* + * A LAN Address. This is an address to/from a LAN interface bridged + * by the BMC, not an address actually out on the LAN. + * + * A concious decision was made here to deviate slightly from the IPMI + * spec. We do not use rqSWID and rsSWID like it shows in the + * message. Instead, we use remote_SWID and local_SWID. This means + * that any message (a request or response) from another device will + * always have exactly the same address. If you didn't do this, + * requests and responses from the same device would have different + * addresses, and that's not too cool. + * + * In this address, the remote_SWID is always the SWID the remote + * message came from, or the SWID we are sending the message to. + * local_SWID is always our SWID. Note that having our SWID in the + * message is a little weird, but this is required. + */ +#define IPMI_LAN_ADDR_TYPE 0x04 +struct ipmi_lan_addr +{ + int addr_type; + short channel; + unsigned char privilege; + unsigned char session_handle; + unsigned char remote_SWID; + unsigned char local_SWID; + unsigned char lun; +}; + + +/* + * Channel for talking directly with the BMC. When using this + * channel, This is for the system interface address type only. FIXME + * - is this right, or should we use -1? + */ +#define IPMI_BMC_CHANNEL 0xf +#define IPMI_NUM_CHANNELS 0x10 + + +/* + * A raw IPMI message without any addressing. This covers both + * commands and responses. The completion code is always the first + * byte of data in the response (as the spec shows the messages laid + * out). + */ +struct ipmi_msg +{ + unsigned char netfn; + unsigned char cmd; + unsigned short data_len; + unsigned char __user *data; +}; + +struct kernel_ipmi_msg +{ + unsigned char netfn; + unsigned char cmd; + unsigned short data_len; + unsigned char *data; +}; + +/* + * Various defines that are useful for IPMI applications. + */ +#define IPMI_INVALID_CMD_COMPLETION_CODE 0xC1 +#define IPMI_TIMEOUT_COMPLETION_CODE 0xC3 +#define IPMI_UNKNOWN_ERR_COMPLETION_CODE 0xff + + +/* + * Receive types for messages coming from the receive interface. This + * is used for the receive in-kernel interface and in the receive + * IOCTL. + * + * The "IPMI_RESPONSE_RESPNOSE_TYPE" is a little strange sounding, but + * it allows you to get the message results when you send a response + * message. + */ +#define IPMI_RESPONSE_RECV_TYPE 1 /* A response to a command */ +#define IPMI_ASYNC_EVENT_RECV_TYPE 2 /* Something from the event queue */ +#define IPMI_CMD_RECV_TYPE 3 /* A command from somewhere else */ +#define IPMI_RESPONSE_RESPONSE_TYPE 4 /* The response for + a sent response, giving any + error status for sending the + response. When you send a + response message, this will + be returned. */ +/* Note that async events and received commands do not have a completion + code as the first byte of the incoming data, unlike a response. */ + + + +#ifdef __KERNEL__ + +/* + * The in-kernel interface. + */ +#include <linux/list.h> +#include <linux/module.h> + +/* Opaque type for a IPMI message user. One of these is needed to + send and receive messages. */ +typedef struct ipmi_user *ipmi_user_t; + +/* + * Stuff coming from the receive interface comes as one of these. + * They are allocated, the receiver must free them with + * ipmi_free_recv_msg() when done with the message. The link is not + * used after the message is delivered, so the upper layer may use the + * link to build a linked list, if it likes. + */ +struct ipmi_recv_msg +{ + struct list_head link; + + /* The type of message as defined in the "Receive Types" + defines above. */ + int recv_type; + + ipmi_user_t user; + struct ipmi_addr addr; + long msgid; + struct kernel_ipmi_msg msg; + + /* The user_msg_data is the data supplied when a message was + sent, if this is a response to a sent message. If this is + not a response to a sent message, then user_msg_data will + be NULL. */ + void *user_msg_data; + + /* Call this when done with the message. It will presumably free + the message and do any other necessary cleanup. */ + void (*done)(struct ipmi_recv_msg *msg); + + /* Place-holder for the data, don't make any assumptions about + the size or existance of this, since it may change. */ + unsigned char msg_data[IPMI_MAX_MSG_LENGTH]; +}; + +/* Allocate and free the receive message. */ +static inline void ipmi_free_recv_msg(struct ipmi_recv_msg *msg) +{ + msg->done(msg); +} + +struct ipmi_user_hndl +{ + /* Routine type to call when a message needs to be routed to + the upper layer. This will be called with some locks held, + the only IPMI routines that can be called are ipmi_request + and the alloc/free operations. The handler_data is the + variable supplied when the receive handler was registered. */ + void (*ipmi_recv_hndl)(struct ipmi_recv_msg *msg, + void *user_msg_data); + + /* Called when the interface detects a watchdog pre-timeout. If + this is NULL, it will be ignored for the user. */ + void (*ipmi_watchdog_pretimeout)(void *handler_data); +}; + +/* Create a new user of the IPMI layer on the given interface number. */ +int ipmi_create_user(unsigned int if_num, + struct ipmi_user_hndl *handler, + void *handler_data, + ipmi_user_t *user); + +/* Destroy the given user of the IPMI layer. Note that after this + function returns, the system is guaranteed to not call any + callbacks for the user. Thus as long as you destroy all the users + before you unload a module, you will be safe. And if you destroy + the users before you destroy the callback structures, it should be + safe, too. */ +int ipmi_destroy_user(ipmi_user_t user); + +/* Get the IPMI version of the BMC we are talking to. */ +void ipmi_get_version(ipmi_user_t user, + unsigned char *major, + unsigned char *minor); + +/* Set and get the slave address and LUN that we will use for our + source messages. Note that this affects the interface, not just + this user, so it will affect all users of this interface. This is + so some initialization code can come in and do the OEM-specific + things it takes to determine your address (if not the BMC) and set + it for everyone else. */ +void ipmi_set_my_address(ipmi_user_t user, + unsigned char address); +unsigned char ipmi_get_my_address(ipmi_user_t user); +void ipmi_set_my_LUN(ipmi_user_t user, + unsigned char LUN); +unsigned char ipmi_get_my_LUN(ipmi_user_t user); + +/* + * Like ipmi_request, but lets you specify the number of retries and + * the retry time. The retries is the number of times the message + * will be resent if no reply is received. If set to -1, the default + * value will be used. The retry time is the time in milliseconds + * between retries. If set to zero, the default value will be + * used. + * + * Don't use this unless you *really* have to. It's primarily for the + * IPMI over LAN converter; since the LAN stuff does its own retries, + * it makes no sense to do it here. However, this can be used if you + * have unusual requirements. + */ +int ipmi_request_settime(ipmi_user_t user, + struct ipmi_addr *addr, + long msgid, + struct kernel_ipmi_msg *msg, + void *user_msg_data, + int priority, + int max_retries, + unsigned int retry_time_ms); + +/* + * Like ipmi_request, but with messages supplied. This will not + * allocate any memory, and the messages may be statically allocated + * (just make sure to do the "done" handling on them). Note that this + * is primarily for the watchdog timer, since it should be able to + * send messages even if no memory is available. This is subject to + * change as the system changes, so don't use it unless you REALLY + * have to. + */ +int ipmi_request_supply_msgs(ipmi_user_t user, + struct ipmi_addr *addr, + long msgid, + struct kernel_ipmi_msg *msg, + void *user_msg_data, + void *supplied_smi, + struct ipmi_recv_msg *supplied_recv, + int priority); + +/* + * When commands come in to the SMS, the user can register to receive + * them. Only one user can be listening on a specific netfn/cmd pair + * at a time, you will get an EBUSY error if the command is already + * registered. If a command is received that does not have a user + * registered, the driver will automatically return the proper + * error. + */ +int ipmi_register_for_cmd(ipmi_user_t user, + unsigned char netfn, + unsigned char cmd); +int ipmi_unregister_for_cmd(ipmi_user_t user, + unsigned char netfn, + unsigned char cmd); + +/* + * Allow run-to-completion mode to be set for the interface of + * a specific user. + */ +void ipmi_user_set_run_to_completion(ipmi_user_t user, int val); + +/* + * When the user is created, it will not receive IPMI events by + * default. The user must set this to TRUE to get incoming events. + * The first user that sets this to TRUE will receive all events that + * have been queued while no one was waiting for events. + */ +int ipmi_set_gets_events(ipmi_user_t user, int val); + +/* + * Called when a new SMI is registered. This will also be called on + * every existing interface when a new watcher is registered with + * ipmi_smi_watcher_register(). + */ +struct ipmi_smi_watcher +{ + struct list_head link; + + /* You must set the owner to the current module, if you are in + a module (generally just set it to "THIS_MODULE"). */ + struct module *owner; + + /* These two are called with read locks held for the interface + the watcher list. So you can add and remove users from the + IPMI interface, send messages, etc., but you cannot add + or remove SMI watchers or SMI interfaces. */ + void (*new_smi)(int if_num); + void (*smi_gone)(int if_num); +}; + +int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher); +int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher); + +/* The following are various helper functions for dealing with IPMI + addresses. */ + +/* Return the maximum length of an IPMI address given it's type. */ +unsigned int ipmi_addr_length(int addr_type); + +/* Validate that the given IPMI address is valid. */ +int ipmi_validate_addr(struct ipmi_addr *addr, int len); + +#endif /* __KERNEL__ */ + + +/* + * The userland interface + */ + +/* + * The userland interface for the IPMI driver is a standard character + * device, with each instance of an interface registered as a minor + * number under the major character device. + * + * The read and write calls do not work, to get messages in and out + * requires ioctl calls because of the complexity of the data. select + * and poll do work, so you can wait for input using the file + * descriptor, you just can use read to get it. + * + * In general, you send a command down to the interface and receive + * responses back. You can use the msgid value to correlate commands + * and responses, the driver will take care of figuring out which + * incoming messages are for which command and find the proper msgid + * value to report. You will only receive reponses for commands you + * send. Asynchronous events, however, go to all open users, so you + * must be ready to handle these (or ignore them if you don't care). + * + * The address type depends upon the channel type. When talking + * directly to the BMC (IPMC_BMC_CHANNEL), the address is ignored + * (IPMI_UNUSED_ADDR_TYPE). When talking to an IPMB channel, you must + * supply a valid IPMB address with the addr_type set properly. + * + * When talking to normal channels, the driver takes care of the + * details of formatting and sending messages on that channel. You do + * not, for instance, have to format a send command, you just send + * whatever command you want to the channel, the driver will create + * the send command, automatically issue receive command and get even + * commands, and pass those up to the proper user. + */ + + +/* The magic IOCTL value for this interface. */ +#define IPMI_IOC_MAGIC 'i' + + +/* Messages sent to the interface are this format. */ +struct ipmi_req +{ + unsigned char __user *addr; /* Address to send the message to. */ + unsigned int addr_len; + + long msgid; /* The sequence number for the message. This + exact value will be reported back in the + response to this request if it is a command. + If it is a response, this will be used as + the sequence value for the response. */ + + struct ipmi_msg msg; +}; +/* + * Send a message to the interfaces. error values are: + * - EFAULT - an address supplied was invalid. + * - EINVAL - The address supplied was not valid, or the command + * was not allowed. + * - EMSGSIZE - The message to was too large. + * - ENOMEM - Buffers could not be allocated for the command. + */ +#define IPMICTL_SEND_COMMAND _IOR(IPMI_IOC_MAGIC, 13, \ + struct ipmi_req) + +/* Messages sent to the interface with timing parameters are this + format. */ +struct ipmi_req_settime +{ + struct ipmi_req req; + + /* See ipmi_request_settime() above for details on these + values. */ + int retries; + unsigned int retry_time_ms; +}; +/* + * Send a message to the interfaces with timing parameters. error values + * are: + * - EFAULT - an address supplied was invalid. + * - EINVAL - The address supplied was not valid, or the command + * was not allowed. + * - EMSGSIZE - The message to was too large. + * - ENOMEM - Buffers could not be allocated for the command. + */ +#define IPMICTL_SEND_COMMAND_SETTIME _IOR(IPMI_IOC_MAGIC, 21, \ + struct ipmi_req_settime) + +/* Messages received from the interface are this format. */ +struct ipmi_recv +{ + int recv_type; /* Is this a command, response or an + asyncronous event. */ + + unsigned char __user *addr; /* Address the message was from is put + here. The caller must supply the + memory. */ + unsigned int addr_len; /* The size of the address buffer. + The caller supplies the full buffer + length, this value is updated to + the actual message length when the + message is received. */ + + long msgid; /* The sequence number specified in the request + if this is a response. If this is a command, + this will be the sequence number from the + command. */ + + struct ipmi_msg msg; /* The data field must point to a buffer. + The data_size field must be set to the + size of the message buffer. The + caller supplies the full buffer + length, this value is updated to the + actual message length when the message + is received. */ +}; + +/* + * Receive a message. error values: + * - EAGAIN - no messages in the queue. + * - EFAULT - an address supplied was invalid. + * - EINVAL - The address supplied was not valid. + * - EMSGSIZE - The message to was too large to fit into the message buffer, + * the message will be left in the buffer. */ +#define IPMICTL_RECEIVE_MSG _IOWR(IPMI_IOC_MAGIC, 12, \ + struct ipmi_recv) + +/* + * Like RECEIVE_MSG, but if the message won't fit in the buffer, it + * will truncate the contents instead of leaving the data in the + * buffer. + */ +#define IPMICTL_RECEIVE_MSG_TRUNC _IOWR(IPMI_IOC_MAGIC, 11, \ + struct ipmi_recv) + +/* Register to get commands from other entities on this interface. */ +struct ipmi_cmdspec +{ + unsigned char netfn; + unsigned char cmd; +}; + +/* + * Register to receive a specific command. error values: + * - EFAULT - an address supplied was invalid. + * - EBUSY - The netfn/cmd supplied was already in use. + * - ENOMEM - could not allocate memory for the entry. + */ +#define IPMICTL_REGISTER_FOR_CMD _IOR(IPMI_IOC_MAGIC, 14, \ + struct ipmi_cmdspec) +/* + * Unregister a regsitered command. error values: + * - EFAULT - an address supplied was invalid. + * - ENOENT - The netfn/cmd was not found registered for this user. + */ +#define IPMICTL_UNREGISTER_FOR_CMD _IOR(IPMI_IOC_MAGIC, 15, \ + struct ipmi_cmdspec) + +/* + * Set whether this interface receives events. Note that the first + * user registered for events will get all pending events for the + * interface. error values: + * - EFAULT - an address supplied was invalid. + */ +#define IPMICTL_SET_GETS_EVENTS_CMD _IOR(IPMI_IOC_MAGIC, 16, int) + +/* + * Set and get the slave address and LUN that we will use for our + * source messages. Note that this affects the interface, not just + * this user, so it will affect all users of this interface. This is + * so some initialization code can come in and do the OEM-specific + * things it takes to determine your address (if not the BMC) and set + * it for everyone else. You should probably leave the LUN alone. + */ +#define IPMICTL_SET_MY_ADDRESS_CMD _IOR(IPMI_IOC_MAGIC, 17, unsigned int) +#define IPMICTL_GET_MY_ADDRESS_CMD _IOR(IPMI_IOC_MAGIC, 18, unsigned int) +#define IPMICTL_SET_MY_LUN_CMD _IOR(IPMI_IOC_MAGIC, 19, unsigned int) +#define IPMICTL_GET_MY_LUN_CMD _IOR(IPMI_IOC_MAGIC, 20, unsigned int) + +/* + * Get/set the default timing values for an interface. You shouldn't + * generally mess with these. + */ +struct ipmi_timing_parms +{ + int retries; + unsigned int retry_time_ms; +}; +#define IPMICTL_SET_TIMING_PARMS_CMD _IOR(IPMI_IOC_MAGIC, 22, \ + struct ipmi_timing_parms) +#define IPMICTL_GET_TIMING_PARMS_CMD _IOR(IPMI_IOC_MAGIC, 23, \ + struct ipmi_timing_parms) + +#endif /* __LINUX_IPMI_H */ |