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Diffstat (limited to 'include/linux/ipmi_smi.h')
| -rw-r--r-- | include/linux/ipmi_smi.h | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/include/linux/ipmi_smi.h b/include/linux/ipmi_smi.h new file mode 100644 index 00000000000..e36ee157ad6 --- /dev/null +++ b/include/linux/ipmi_smi.h @@ -0,0 +1,156 @@ +/* + * 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 */ |