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156 lines
5.8 KiB
156 lines
5.8 KiB
/*
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* ipmi_smi.h
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*
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* MontaVista IPMI system management interface
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*
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* Author: MontaVista Software, Inc.
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* Corey Minyard <minyard@mvista.com>
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* source@mvista.com
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*
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* Copyright 2002 MontaVista Software Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __LINUX_IPMI_SMI_H
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#define __LINUX_IPMI_SMI_H
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#include <linux/ipmi_msgdefs.h>
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#include <linux/proc_fs.h>
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#include <linux/module.h>
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/* This files describes the interface for IPMI system management interface
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drivers to bind into the IPMI message handler. */
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/* Structure for the low-level drivers. */
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typedef struct ipmi_smi *ipmi_smi_t;
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/*
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* Messages to/from the lower layer. The smi interface will take one
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* of these to send. After the send has occurred and a response has
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* been received, it will report this same data structure back up to
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* the upper layer. If an error occurs, it should fill in the
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* response with an error code in the completion code location. When
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* asynchronous data is received, one of these is allocated, the
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* data_size is set to zero and the response holds the data from the
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* get message or get event command that the interface initiated.
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* Note that it is the interfaces responsibility to detect
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* asynchronous data and messages and request them from the
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* interface.
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*/
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struct ipmi_smi_msg
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{
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struct list_head link;
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long msgid;
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void *user_data;
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int data_size;
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unsigned char data[IPMI_MAX_MSG_LENGTH];
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int rsp_size;
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unsigned char rsp[IPMI_MAX_MSG_LENGTH];
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/* Will be called when the system is done with the message
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(presumably to free it). */
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void (*done)(struct ipmi_smi_msg *msg);
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};
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struct ipmi_smi_handlers
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{
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struct module *owner;
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/* Called to enqueue an SMI message to be sent. This
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operation is not allowed to fail. If an error occurs, it
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should report back the error in a received message. It may
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do this in the current call context, since no write locks
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are held when this is run. If the priority is > 0, the
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message will go into a high-priority queue and be sent
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first. Otherwise, it goes into a normal-priority queue. */
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void (*sender)(void *send_info,
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struct ipmi_smi_msg *msg,
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int priority);
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/* Called by the upper layer to request that we try to get
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events from the BMC we are attached to. */
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void (*request_events)(void *send_info);
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/* Called when the interface should go into "run to
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completion" mode. If this call sets the value to true, the
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interface should make sure that all messages are flushed
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out and that none are pending, and any new requests are run
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to completion immediately. */
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void (*set_run_to_completion)(void *send_info, int run_to_completion);
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/* Called to poll for work to do. This is so upper layers can
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poll for operations during things like crash dumps. */
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void (*poll)(void *send_info);
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/* Tell the handler that we are using it/not using it. The
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message handler get the modules that this handler belongs
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to; this function lets the SMI claim any modules that it
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uses. These may be NULL if this is not required. */
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int (*inc_usecount)(void *send_info);
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void (*dec_usecount)(void *send_info);
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};
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/* Add a low-level interface to the IPMI driver. Note that if the
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interface doesn't know its slave address, it should pass in zero. */
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int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
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void *send_info,
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unsigned char version_major,
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unsigned char version_minor,
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unsigned char slave_addr,
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ipmi_smi_t *intf);
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/*
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* Remove a low-level interface from the IPMI driver. This will
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* return an error if the interface is still in use by a user.
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*/
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int ipmi_unregister_smi(ipmi_smi_t intf);
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/*
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* The lower layer reports received messages through this interface.
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* The data_size should be zero if this is an asyncronous message. If
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* the lower layer gets an error sending a message, it should format
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* an error response in the message response.
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*/
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void ipmi_smi_msg_received(ipmi_smi_t intf,
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struct ipmi_smi_msg *msg);
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/* The lower layer received a watchdog pre-timeout on interface. */
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void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf);
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struct ipmi_smi_msg *ipmi_alloc_smi_msg(void);
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static inline void ipmi_free_smi_msg(struct ipmi_smi_msg *msg)
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{
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msg->done(msg);
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}
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/* Allow the lower layer to add things to the proc filesystem
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directory for this interface. Note that the entry will
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automatically be dstroyed when the interface is destroyed. */
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int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name,
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read_proc_t *read_proc, write_proc_t *write_proc,
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void *data, struct module *owner);
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#endif /* __LINUX_IPMI_SMI_H */
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