ipmi_smi.h
上传用户:szlgq88
上传日期:2009-04-28
资源大小:48287k
文件大小:6k
- /*
- * ipmi_smi.h
- *
- * MontaVista IPMI system management 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_SMI_H
- #define __LINUX_IPMI_SMI_H
- #include <linux/ipmi_msgdefs.h>
- #include <linux/proc_fs.h>
- #include <linux/module.h>
- /* This files describes the interface for IPMI system management interface
- drivers to bind into the IPMI message handler. */
- /* Structure for the low-level drivers. */
- typedef struct ipmi_smi *ipmi_smi_t;
- /*
- * Messages to/from the lower layer. The smi interface will take one
- * of these to send. After the send has occurred and a response has
- * been received, it will report this same data structure back up to
- * the upper layer. If an error occurs, it should fill in the
- * response with an error code in the completion code location. When
- * asynchronous data is received, one of these is allocated, the
- * data_size is set to zero and the response holds the data from the
- * get message or get event command that the interface initiated.
- * Note that it is the interfaces responsibility to detect
- * asynchronous data and messages and request them from the
- * interface.
- */
- struct ipmi_smi_msg
- {
- struct list_head link;
- long msgid;
- void *user_data;
- int data_size;
- unsigned char data[IPMI_MAX_MSG_LENGTH];
- int rsp_size;
- unsigned char rsp[IPMI_MAX_MSG_LENGTH];
- /* Will be called when the system is done with the message
- (presumably to free it). */
- void (*done)(struct ipmi_smi_msg *msg);
- };
- struct ipmi_smi_handlers
- {
- struct module *owner;
- /* Called to enqueue an SMI message to be sent. This
- operation is not allowed to fail. If an error occurs, it
- should report back the error in a received message. It may
- do this in the current call context, since no write locks
- are held when this is run. If the priority is > 0, the
- message will go into a high-priority queue and be sent
- first. Otherwise, it goes into a normal-priority queue. */
- void (*sender)(void *send_info,
- struct ipmi_smi_msg *msg,
- int priority);
- /* Called by the upper layer to request that we try to get
- events from the BMC we are attached to. */
- void (*request_events)(void *send_info);
- /* Called when the interface should go into "run to
- completion" mode. If this call sets the value to true, the
- interface should make sure that all messages are flushed
- out and that none are pending, and any new requests are run
- to completion immediately. */
- void (*set_run_to_completion)(void *send_info, int run_to_completion);
- /* Called to poll for work to do. This is so upper layers can
- poll for operations during things like crash dumps. */
- void (*poll)(void *send_info);
- /* Tell the handler that we are using it/not using it. The
- message handler get the modules that this handler belongs
- to; this function lets the SMI claim any modules that it
- uses. These may be NULL if this is not required. */
- int (*inc_usecount)(void *send_info);
- void (*dec_usecount)(void *send_info);
- };
- /* Add a low-level interface to the IPMI driver. Note that if the
- interface doesn't know its slave address, it should pass in zero. */
- int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
- void *send_info,
- unsigned char version_major,
- unsigned char version_minor,
- unsigned char slave_addr,
- ipmi_smi_t *intf);
- /*
- * Remove a low-level interface from the IPMI driver. This will
- * return an error if the interface is still in use by a user.
- */
- int ipmi_unregister_smi(ipmi_smi_t intf);
- /*
- * The lower layer reports received messages through this interface.
- * The data_size should be zero if this is an asyncronous message. If
- * the lower layer gets an error sending a message, it should format
- * an error response in the message response.
- */
- void ipmi_smi_msg_received(ipmi_smi_t intf,
- struct ipmi_smi_msg *msg);
- /* The lower layer received a watchdog pre-timeout on interface. */
- void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf);
- struct ipmi_smi_msg *ipmi_alloc_smi_msg(void);
- static inline void ipmi_free_smi_msg(struct ipmi_smi_msg *msg)
- {
- msg->done(msg);
- }
- /* Allow the lower layer to add things to the proc filesystem
- directory for this interface. Note that the entry will
- automatically be dstroyed when the interface is destroyed. */
- int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name,
- read_proc_t *read_proc, write_proc_t *write_proc,
- void *data, struct module *owner);
- #endif /* __LINUX_IPMI_SMI_H */