ipmi.h
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- /*
- * 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>
- #include <linux/compiler.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>
- #ifdef CONFIG_PROC_FS
- #include <linux/proc_fs.h>
- extern struct proc_dir_entry *proc_ipmi_root;
- #endif /* CONFIG_PROC_FS */
- /* 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. If the user above is NULL, then this will be the
- intf. */
- 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. Note that each channel can have its own address. */
- int ipmi_set_my_address(ipmi_user_t user,
- unsigned int channel,
- unsigned char address);
- int ipmi_get_my_address(ipmi_user_t user,
- unsigned int channel,
- unsigned char *address);
- int ipmi_set_my_LUN(ipmi_user_t user,
- unsigned int channel,
- unsigned char LUN);
- int ipmi_get_my_LUN(ipmi_user_t user,
- unsigned int channel,
- unsigned char *LUN);
- /*
- * 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.
- */
- struct ipmi_channel_lun_address_set
- {
- unsigned short channel;
- unsigned char value;
- };
- #define IPMICTL_SET_MY_CHANNEL_ADDRESS_CMD _IOR(IPMI_IOC_MAGIC, 24, struct ipmi_channel_lun_address_set)
- #define IPMICTL_GET_MY_CHANNEL_ADDRESS_CMD _IOR(IPMI_IOC_MAGIC, 25, struct ipmi_channel_lun_address_set)
- #define IPMICTL_SET_MY_CHANNEL_LUN_CMD _IOR(IPMI_IOC_MAGIC, 26, struct ipmi_channel_lun_address_set)
- #define IPMICTL_GET_MY_CHANNEL_LUN_CMD _IOR(IPMI_IOC_MAGIC, 27, struct ipmi_channel_lun_address_set)
- /* Legacy interfaces, these only set IPMB 0. */
- #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 */