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338 lines
11 KiB
338 lines
11 KiB
/* SPDX-License-Identifier: GPL-2.0+ */ |
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/* |
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* ipmi.h |
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* |
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* MontaVista IPMI interface |
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* |
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* Author: MontaVista Software, Inc. |
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* Corey Minyard <[email protected]> |
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* [email protected] |
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* |
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* Copyright 2002 MontaVista Software Inc. |
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* |
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*/ |
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#ifndef __LINUX_IPMI_H |
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#define __LINUX_IPMI_H |
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#include <uapi/linux/ipmi.h> |
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#include <linux/list.h> |
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#include <linux/proc_fs.h> |
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#include <linux/acpi.h> /* For acpi_handle */ |
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struct module; |
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struct device; |
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/* |
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* Opaque type for a IPMI message user. One of these is needed to |
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* send and receive messages. |
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*/ |
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struct ipmi_user; |
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/* |
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* Stuff coming from the receive interface comes as one of these. |
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* They are allocated, the receiver must free them with |
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* ipmi_free_recv_msg() when done with the message. The link is not |
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* used after the message is delivered, so the upper layer may use the |
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* link to build a linked list, if it likes. |
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*/ |
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struct ipmi_recv_msg { |
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struct list_head link; |
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/* |
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* The type of message as defined in the "Receive Types" |
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* defines above. |
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*/ |
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int recv_type; |
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struct ipmi_user *user; |
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struct ipmi_addr addr; |
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long msgid; |
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struct kernel_ipmi_msg msg; |
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/* |
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* The user_msg_data is the data supplied when a message was |
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* sent, if this is a response to a sent message. If this is |
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* not a response to a sent message, then user_msg_data will |
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* be NULL. If the user above is NULL, then this will be the |
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* intf. |
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*/ |
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void *user_msg_data; |
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/* |
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* Call this when done with the message. It will presumably free |
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* the message and do any other necessary cleanup. |
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*/ |
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void (*done)(struct ipmi_recv_msg *msg); |
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/* |
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* Place-holder for the data, don't make any assumptions about |
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* the size or existence of this, since it may change. |
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*/ |
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unsigned char msg_data[IPMI_MAX_MSG_LENGTH]; |
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}; |
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/* Allocate and free the receive message. */ |
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void ipmi_free_recv_msg(struct ipmi_recv_msg *msg); |
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struct ipmi_user_hndl { |
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/* |
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* Routine type to call when a message needs to be routed to |
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* the upper layer. This will be called with some locks held, |
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* the only IPMI routines that can be called are ipmi_request |
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* and the alloc/free operations. The handler_data is the |
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* variable supplied when the receive handler was registered. |
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*/ |
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void (*ipmi_recv_hndl)(struct ipmi_recv_msg *msg, |
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void *user_msg_data); |
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/* |
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* Called when the interface detects a watchdog pre-timeout. If |
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* this is NULL, it will be ignored for the user. |
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*/ |
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void (*ipmi_watchdog_pretimeout)(void *handler_data); |
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/* |
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* If not NULL, called at panic time after the interface has |
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* been set up to handle run to completion. |
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*/ |
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void (*ipmi_panic_handler)(void *handler_data); |
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/* |
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* Called when the interface has been removed. After this returns |
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* the user handle will be invalid. The interface may or may |
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* not be usable when this is called, but it will return errors |
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* if it is not usable. |
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*/ |
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void (*shutdown)(void *handler_data); |
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}; |
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/* Create a new user of the IPMI layer on the given interface number. */ |
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int ipmi_create_user(unsigned int if_num, |
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const struct ipmi_user_hndl *handler, |
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void *handler_data, |
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struct ipmi_user **user); |
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/* |
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* Destroy the given user of the IPMI layer. Note that after this |
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* function returns, the system is guaranteed to not call any |
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* callbacks for the user. Thus as long as you destroy all the users |
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* before you unload a module, you will be safe. And if you destroy |
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* the users before you destroy the callback structures, it should be |
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* safe, too. |
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*/ |
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int ipmi_destroy_user(struct ipmi_user *user); |
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/* Get the IPMI version of the BMC we are talking to. */ |
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int ipmi_get_version(struct ipmi_user *user, |
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unsigned char *major, |
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unsigned char *minor); |
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/* |
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* Set and get the slave address and LUN that we will use for our |
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* source messages. Note that this affects the interface, not just |
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* this user, so it will affect all users of this interface. This is |
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* so some initialization code can come in and do the OEM-specific |
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* things it takes to determine your address (if not the BMC) and set |
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* it for everyone else. Note that each channel can have its own |
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* address. |
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*/ |
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int ipmi_set_my_address(struct ipmi_user *user, |
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unsigned int channel, |
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unsigned char address); |
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int ipmi_get_my_address(struct ipmi_user *user, |
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unsigned int channel, |
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unsigned char *address); |
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int ipmi_set_my_LUN(struct ipmi_user *user, |
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unsigned int channel, |
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unsigned char LUN); |
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int ipmi_get_my_LUN(struct ipmi_user *user, |
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unsigned int channel, |
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unsigned char *LUN); |
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/* |
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* Like ipmi_request, but lets you specify the number of retries and |
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* the retry time. The retries is the number of times the message |
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* will be resent if no reply is received. If set to -1, the default |
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* value will be used. The retry time is the time in milliseconds |
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* between retries. If set to zero, the default value will be |
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* used. |
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* |
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* Don't use this unless you *really* have to. It's primarily for the |
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* IPMI over LAN converter; since the LAN stuff does its own retries, |
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* it makes no sense to do it here. However, this can be used if you |
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* have unusual requirements. |
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*/ |
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int ipmi_request_settime(struct ipmi_user *user, |
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struct ipmi_addr *addr, |
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long msgid, |
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struct kernel_ipmi_msg *msg, |
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void *user_msg_data, |
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int priority, |
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int max_retries, |
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unsigned int retry_time_ms); |
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/* |
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* Like ipmi_request, but with messages supplied. This will not |
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* allocate any memory, and the messages may be statically allocated |
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* (just make sure to do the "done" handling on them). Note that this |
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* is primarily for the watchdog timer, since it should be able to |
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* send messages even if no memory is available. This is subject to |
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* change as the system changes, so don't use it unless you REALLY |
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* have to. |
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*/ |
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int ipmi_request_supply_msgs(struct ipmi_user *user, |
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struct ipmi_addr *addr, |
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long msgid, |
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struct kernel_ipmi_msg *msg, |
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void *user_msg_data, |
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void *supplied_smi, |
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struct ipmi_recv_msg *supplied_recv, |
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int priority); |
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/* |
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* Poll the IPMI interface for the user. This causes the IPMI code to |
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* do an immediate check for information from the driver and handle |
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* anything that is immediately pending. This will not block in any |
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* way. This is useful if you need to spin waiting for something to |
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* happen in the IPMI driver. |
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*/ |
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void ipmi_poll_interface(struct ipmi_user *user); |
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/* |
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* When commands come in to the SMS, the user can register to receive |
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* them. Only one user can be listening on a specific netfn/cmd/chan tuple |
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* at a time, you will get an EBUSY error if the command is already |
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* registered. If a command is received that does not have a user |
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* registered, the driver will automatically return the proper |
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* error. Channels are specified as a bitfield, use IPMI_CHAN_ALL to |
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* mean all channels. |
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*/ |
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int ipmi_register_for_cmd(struct ipmi_user *user, |
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unsigned char netfn, |
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unsigned char cmd, |
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unsigned int chans); |
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int ipmi_unregister_for_cmd(struct ipmi_user *user, |
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unsigned char netfn, |
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unsigned char cmd, |
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unsigned int chans); |
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/* |
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* Go into a mode where the driver will not autonomously attempt to do |
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* things with the interface. It will still respond to attentions and |
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* interrupts, and it will expect that commands will complete. It |
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* will not automatcially check for flags, events, or things of that |
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* nature. |
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* |
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* This is primarily used for firmware upgrades. The idea is that |
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* when you go into firmware upgrade mode, you do this operation |
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* and the driver will not attempt to do anything but what you tell |
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* it or what the BMC asks for. |
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* |
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* Note that if you send a command that resets the BMC, the driver |
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* will still expect a response from that command. So the BMC should |
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* reset itself *after* the response is sent. Resetting before the |
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* response is just silly. |
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* |
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* If in auto maintenance mode, the driver will automatically go into |
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* maintenance mode for 30 seconds if it sees a cold reset, a warm |
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* reset, or a firmware NetFN. This means that code that uses only |
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* firmware NetFN commands to do upgrades will work automatically |
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* without change, assuming it sends a message every 30 seconds or |
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* less. |
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* |
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* See the IPMI_MAINTENANCE_MODE_xxx defines for what the mode means. |
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*/ |
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int ipmi_get_maintenance_mode(struct ipmi_user *user); |
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int ipmi_set_maintenance_mode(struct ipmi_user *user, int mode); |
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/* |
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* When the user is created, it will not receive IPMI events by |
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* default. The user must set this to TRUE to get incoming events. |
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* The first user that sets this to TRUE will receive all events that |
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* have been queued while no one was waiting for events. |
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*/ |
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int ipmi_set_gets_events(struct ipmi_user *user, bool val); |
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/* |
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* Called when a new SMI is registered. This will also be called on |
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* every existing interface when a new watcher is registered with |
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* ipmi_smi_watcher_register(). |
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*/ |
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struct ipmi_smi_watcher { |
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struct list_head link; |
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/* |
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* You must set the owner to the current module, if you are in |
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* a module (generally just set it to "THIS_MODULE"). |
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*/ |
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struct module *owner; |
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/* |
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* These two are called with read locks held for the interface |
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* the watcher list. So you can add and remove users from the |
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* IPMI interface, send messages, etc., but you cannot add |
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* or remove SMI watchers or SMI interfaces. |
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*/ |
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void (*new_smi)(int if_num, struct device *dev); |
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void (*smi_gone)(int if_num); |
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}; |
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int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher); |
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int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher); |
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/* |
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* The following are various helper functions for dealing with IPMI |
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* addresses. |
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*/ |
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/* Return the maximum length of an IPMI address given it's type. */ |
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unsigned int ipmi_addr_length(int addr_type); |
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/* Validate that the given IPMI address is valid. */ |
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int ipmi_validate_addr(struct ipmi_addr *addr, int len); |
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/* |
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* How did the IPMI driver find out about the device? |
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*/ |
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enum ipmi_addr_src { |
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SI_INVALID = 0, SI_HOTMOD, SI_HARDCODED, SI_SPMI, SI_ACPI, SI_SMBIOS, |
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SI_PCI, SI_DEVICETREE, SI_PLATFORM, SI_LAST |
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}; |
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const char *ipmi_addr_src_to_str(enum ipmi_addr_src src); |
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union ipmi_smi_info_union { |
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#ifdef CONFIG_ACPI |
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/* |
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* the acpi_info element is defined for the SI_ACPI |
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* address type |
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*/ |
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struct { |
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acpi_handle acpi_handle; |
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} acpi_info; |
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#endif |
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}; |
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struct ipmi_smi_info { |
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enum ipmi_addr_src addr_src; |
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/* |
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* Base device for the interface. Don't forget to put this when |
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* you are done. |
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*/ |
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struct device *dev; |
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/* |
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* The addr_info provides more detailed info for some IPMI |
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* devices, depending on the addr_src. Currently only SI_ACPI |
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* info is provided. |
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*/ |
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union ipmi_smi_info_union addr_info; |
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}; |
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/* This is to get the private info of struct ipmi_smi */ |
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extern int ipmi_get_smi_info(int if_num, struct ipmi_smi_info *data); |
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#define GET_DEVICE_ID_MAX_RETRY 5 |
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#endif /* __LINUX_IPMI_H */
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