[linux.git] / include / linux / ipmi_smi.h

/*
 * ipmi_smi.h
 *
 * MontaVista IPMI system management interface
 *
 * Author: MontaVista Software, Inc.
 *         Corey Minyard <[email protected]>
 *         [email protected]
 *
 * 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>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/ipmi_smi.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;

	/* The low-level interface cannot start sending messages to
	   the upper layer until this function is called.  This may
	   not be NULL, the lower layer must take the interface from
	   this call. */
	int (*start_processing)(void       *send_info,
				ipmi_smi_t new_intf);

	/* 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);

	/* Enable/disable firmware maintenance mode.  Note that this
	   is *not* the modes defined, this is simply an on/off
	   setting.  The message handler does the mode handling.  Note
	   that this is called from interrupt context, so it cannot
	   block. */
	void (*set_maintenance_mode)(void *send_info, int enable);

	/* 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);
};

struct ipmi_device_id {
	unsigned char device_id;
	unsigned char device_revision;
	unsigned char firmware_revision_1;
	unsigned char firmware_revision_2;
	unsigned char ipmi_version;
	unsigned char additional_device_support;
	unsigned int  manufacturer_id;
	unsigned int  product_id;
	unsigned char aux_firmware_revision[4];
	unsigned int  aux_firmware_revision_set : 1;
};

#define ipmi_version_major(v) ((v)->ipmi_version & 0xf)
#define ipmi_version_minor(v) ((v)->ipmi_version >> 4)

/* Take a pointer to a raw data buffer and a length and extract device
   id information from it.  The first byte of data must point to the
   netfn << 2, the data should be of the format:
      netfn << 2, cmd, completion code, data
   as normally comes from a device interface. */
static inline int ipmi_demangle_device_id(const unsigned char *data,
					  unsigned int data_len,
					  struct ipmi_device_id *id)
{
	if (data_len < 9)
		return -EINVAL;
	if (data[0] != IPMI_NETFN_APP_RESPONSE << 2 ||
	    data[1] != IPMI_GET_DEVICE_ID_CMD)
		/* Strange, didn't get the response we expected. */
		return -EINVAL;
	if (data[2] != 0)
		/* That's odd, it shouldn't be able to fail. */
		return -EINVAL;

	data += 3;
	data_len -= 3;
	id->device_id = data[0];
	id->device_revision = data[1];
	id->firmware_revision_1 = data[2];
	id->firmware_revision_2 = data[3];
	id->ipmi_version = data[4];
	id->additional_device_support = data[5];
	if (data_len >= 6) {
		id->manufacturer_id = (data[6] | (data[7] << 8) |
				       (data[8] << 16));
		id->product_id = data[9] | (data[10] << 8);
	} else {
		id->manufacturer_id = 0;
		id->product_id = 0;
	}
	if (data_len >= 15) {
		memcpy(id->aux_firmware_revision, data+11, 4);
		id->aux_firmware_revision_set = 1;
	} else
		id->aux_firmware_revision_set = 0;

	return 0;
}

/* 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.
   The low-level interface should not deliver any messages to the
   upper layer until the start_processing() function in the handlers
   is called, and the lower layer must get the interface from that
   call. */
int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
		      void                     *send_info,
		      struct ipmi_device_id    *device_id,
		      struct device            *dev,
		      const char               *sysfs_name,
		      unsigned char            slave_addr);

/*
 * 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 */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* ipmi_smi.h
	3	*
	4	* MontaVista IPMI system management interface
	5	*
	6	* Author: MontaVista Software, Inc.
	7	* Corey Minyard <[email protected]>
	8	* [email protected]
	9	*
	10	* Copyright 2002 MontaVista Software Inc.
	11	*
	12	* This program is free software; you can redistribute it and/or modify it
	13	* under the terms of the GNU General Public License as published by the
	14	* Free Software Foundation; either version 2 of the License, or (at your
	15	* option) any later version.
	16	*
	17	*
	18	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
	19	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
	20	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
	23	* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
	24	* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
	25	* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
	26	* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
	27	* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	28	*
	29	* You should have received a copy of the GNU General Public License along
	30	* with this program; if not, write to the Free Software Foundation, Inc.,
	31	* 675 Mass Ave, Cambridge, MA 02139, USA.
	32	*/
	33
	34	#ifndef __LINUX_IPMI_SMI_H
	35	#define __LINUX_IPMI_SMI_H
	36
	37	#include <linux/ipmi_msgdefs.h>
	38	#include <linux/proc_fs.h>
	39	#include <linux/module.h>
50c812b2 CM	40	#include <linux/device.h>
	41	#include <linux/platform_device.h>
	42	#include <linux/ipmi_smi.h>
1da177e4 LT	43
	44	/* This files describes the interface for IPMI system management interface
	45	drivers to bind into the IPMI message handler. */
	46
	47	/* Structure for the low-level drivers. */
	48	typedef struct ipmi_smi *ipmi_smi_t;
	49
	50	/*
	51	* Messages to/from the lower layer. The smi interface will take one
	52	* of these to send. After the send has occurred and a response has
	53	* been received, it will report this same data structure back up to
	54	* the upper layer. If an error occurs, it should fill in the
	55	* response with an error code in the completion code location. When
	56	* asynchronous data is received, one of these is allocated, the
	57	* data_size is set to zero and the response holds the data from the
	58	* get message or get event command that the interface initiated.
	59	* Note that it is the interfaces responsibility to detect
	60	* asynchronous data and messages and request them from the
	61	* interface.
	62	*/
	63	struct ipmi_smi_msg
	64	{
	65	struct list_head link;
	66
	67	long msgid;
	68	void *user_data;
	69
	70	int data_size;
	71	unsigned char data[IPMI_MAX_MSG_LENGTH];
	72
	73	int rsp_size;
	74	unsigned char rsp[IPMI_MAX_MSG_LENGTH];
	75
	76	/* Will be called when the system is done with the message
	77	(presumably to free it). */
	78	void (done)(struct ipmi_smi_msg msg);
	79	};
	80
	81	struct ipmi_smi_handlers
	82	{
	83	struct module *owner;
	84
453823ba CM	85	/* The low-level interface cannot start sending messages to
	86	the upper layer until this function is called. This may
	87	not be NULL, the lower layer must take the interface from
	88	this call. */
	89	int (start_processing)(void send_info,
	90	ipmi_smi_t new_intf);
	91
1da177e4 LT	92	/* Called to enqueue an SMI message to be sent. This
	93	operation is not allowed to fail. If an error occurs, it
	94	should report back the error in a received message. It may
	95	do this in the current call context, since no write locks
	96	are held when this is run. If the priority is > 0, the
	97	message will go into a high-priority queue and be sent
	98	first. Otherwise, it goes into a normal-priority queue. */
	99	void (sender)(void send_info,
	100	struct ipmi_smi_msg *msg,
	101	int priority);
	102
	103	/* Called by the upper layer to request that we try to get
	104	events from the BMC we are attached to. */
	105	void (request_events)(void send_info);
	106
	107	/* Called when the interface should go into "run to
	108	completion" mode. If this call sets the value to true, the
	109	interface should make sure that all messages are flushed
	110	out and that none are pending, and any new requests are run
	111	to completion immediately. */
	112	void (set_run_to_completion)(void send_info, int run_to_completion);
	113
	114	/* Called to poll for work to do. This is so upper layers can
	115	poll for operations during things like crash dumps. */
	116	void (poll)(void send_info);
	117
b9675136 CM	118	/* Enable/disable firmware maintenance mode. Note that this
	119	is not the modes defined, this is simply an on/off
	120	setting. The message handler does the mode handling. Note
3a4fa0a2	121	that this is called from interrupt context, so it cannot
b9675136 CM	122	block. */
	123	void (set_maintenance_mode)(void send_info, int enable);
	124
1da177e4 LT	125	/* Tell the handler that we are using it/not using it. The
	126	message handler get the modules that this handler belongs
	127	to; this function lets the SMI claim any modules that it
	128	uses. These may be NULL if this is not required. */
	129	int (inc_usecount)(void send_info);
	130	void (dec_usecount)(void send_info);
	131	};
	132
50c812b2 CM	133	struct ipmi_device_id {
	134	unsigned char device_id;
	135	unsigned char device_revision;
	136	unsigned char firmware_revision_1;
	137	unsigned char firmware_revision_2;
	138	unsigned char ipmi_version;
	139	unsigned char additional_device_support;
	140	unsigned int manufacturer_id;
	141	unsigned int product_id;
	142	unsigned char aux_firmware_revision[4];
	143	unsigned int aux_firmware_revision_set : 1;
	144	};
	145
	146	#define ipmi_version_major(v) ((v)->ipmi_version & 0xf)
	147	#define ipmi_version_minor(v) ((v)->ipmi_version >> 4)
	148
	149	/* Take a pointer to a raw data buffer and a length and extract device
	150	id information from it. The first byte of data must point to the
d8c98618 CM	151	netfn << 2, the data should be of the format:
	152	netfn << 2, cmd, completion code, data
	153	as normally comes from a device interface. */
	154	static inline int ipmi_demangle_device_id(const unsigned char *data,
	155	unsigned int data_len,
	156	struct ipmi_device_id *id)
50c812b2	157	{
d8c98618 CM	158	if (data_len < 9)
	159	return -EINVAL;
	160	if (data[0] != IPMI_NETFN_APP_RESPONSE << 2 \|\|
	161	data[1] != IPMI_GET_DEVICE_ID_CMD)
	162	/* Strange, didn't get the response we expected. */
	163	return -EINVAL;
	164	if (data[2] != 0)
	165	/* That's odd, it shouldn't be able to fail. */
	166	return -EINVAL;
	167
	168	data += 3;
	169	data_len -= 3;
50c812b2 CM	170	id->device_id = data[0];
	171	id->device_revision = data[1];
	172	id->firmware_revision_1 = data[2];
	173	id->firmware_revision_2 = data[3];
	174	id->ipmi_version = data[4];
	175	id->additional_device_support = data[5];
d8c98618 CM	176	if (data_len >= 6) {
	177	id->manufacturer_id = (data[6] \| (data[7] << 8) \|
	178	(data[8] << 16));
	179	id->product_id = data[9] \| (data[10] << 8);
	180	} else {
	181	id->manufacturer_id = 0;
	182	id->product_id = 0;
	183	}
50c812b2 CM	184	if (data_len >= 15) {
	185	memcpy(id->aux_firmware_revision, data+11, 4);
	186	id->aux_firmware_revision_set = 1;
	187	} else
	188	id->aux_firmware_revision_set = 0;
d8c98618 CM	189
d8c98618 CM	190	return 0;
50c812b2 CM	191	}
50c812b2 CM	192
1da177e4	193	/* Add a low-level interface to the IPMI driver. Note that if the
453823ba CM	194	interface doesn't know its slave address, it should pass in zero.
	195	The low-level interface should not deliver any messages to the
	196	upper layer until the start_processing() function in the handlers
	197	is called, and the lower layer must get the interface from that
	198	call. */
1da177e4 LT	199	int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
1da177e4 LT	200	void *send_info,
50c812b2 CM	201	struct ipmi_device_id *device_id,
50c812b2 CM	202	struct device *dev,
759643b8	203	const char *sysfs_name,
453823ba	204	unsigned char slave_addr);
1da177e4 LT	205
	206	/*
	207	* Remove a low-level interface from the IPMI driver. This will
	208	* return an error if the interface is still in use by a user.
	209	*/
	210	int ipmi_unregister_smi(ipmi_smi_t intf);
	211
	212	/*
	213	* The lower layer reports received messages through this interface.
	214	* The data_size should be zero if this is an asyncronous message. If
	215	* the lower layer gets an error sending a message, it should format
	216	* an error response in the message response.
	217	*/
	218	void ipmi_smi_msg_received(ipmi_smi_t intf,
	219	struct ipmi_smi_msg *msg);
	220
	221	/* The lower layer received a watchdog pre-timeout on interface. */
	222	void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf);
	223
	224	struct ipmi_smi_msg *ipmi_alloc_smi_msg(void);
	225	static inline void ipmi_free_smi_msg(struct ipmi_smi_msg *msg)
	226	{
	227	msg->done(msg);
	228	}
	229
	230	/* Allow the lower layer to add things to the proc filesystem
	231	directory for this interface. Note that the entry will
	232	automatically be dstroyed when the interface is destroyed. */
	233	int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name,
	234	read_proc_t read_proc, write_proc_t write_proc,
	235	void data, struct module owner);
	236
	237	#endif /* __LINUX_IPMI_SMI_H */