Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 602 insertions, 0 deletions

diff --git a/include/linux/ipmi.h b/include/linux/ipmi.h
new file mode 100644
index 000000000000..2ec265e1045f
--- /dev/null
+++ b/include/linux/ipmi.h
@@ -0,0 +1,602 @@
+/*
+ * ipmi.h
+ *
+ * MontaVista IPMI 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_H
+#define __LINUX_IPMI_H
+
+#include <linux/ipmi_msgdefs.h>
+
+/*
+ * This file describes an interface to an IPMI driver.  You have to
+ * have a fairly good understanding of IPMI to use this, so go read
+ * the specs first before actually trying to do anything.
+ *
+ * With that said, this driver provides a multi-user interface to the
+ * IPMI driver, and it allows multiple IPMI physical interfaces below
+ * the driver.  The physical interfaces bind as a lower layer on the
+ * driver.  They appear as interfaces to the application using this
+ * interface.
+ *
+ * Multi-user means that multiple applications may use the driver,
+ * send commands, receive responses, etc.  The driver keeps track of
+ * commands the user sends and tracks the responses.  The responses
+ * will go back to the application that send the command.  If the
+ * response doesn't come back in time, the driver will return a
+ * timeout error response to the application.  Asynchronous events
+ * from the BMC event queue will go to all users bound to the driver.
+ * The incoming event queue in the BMC will automatically be flushed
+ * if it becomes full and it is queried once a second to see if
+ * anything is in it.  Incoming commands to the driver will get
+ * delivered as commands.
+ *
+ * This driver provides two main interfaces: one for in-kernel
+ * applications and another for userland applications.  The
+ * capabilities are basically the same for both interface, although
+ * the interfaces are somewhat different.  The stuff in the
+ * #ifdef KERNEL below is the in-kernel interface.  The userland
+ * interface is defined later in the file.  */
+
+
+
+/*
+ * This is an overlay for all the address types, so it's easy to
+ * determine the actual address type.  This is kind of like addresses
+ * work for sockets.
+ */
+#define IPMI_MAX_ADDR_SIZE 32
+struct ipmi_addr
+{
+	 /* Try to take these from the "Channel Medium Type" table
+	    in section 6.5 of the IPMI 1.5 manual. */
+	int   addr_type;
+	short channel;
+	char  data[IPMI_MAX_ADDR_SIZE];
+};
+
+/*
+ * When the address is not used, the type will be set to this value.
+ * The channel is the BMC's channel number for the channel (usually
+ * 0), or IPMC_BMC_CHANNEL if communicating directly with the BMC.
+ */
+#define IPMI_SYSTEM_INTERFACE_ADDR_TYPE	0x0c
+struct ipmi_system_interface_addr
+{
+	int           addr_type;
+	short         channel;
+	unsigned char lun;
+};
+
+/* An IPMB Address. */
+#define IPMI_IPMB_ADDR_TYPE		0x01
+/* Used for broadcast get device id as described in section 17.9 of the
+   IPMI 1.5 manual. */ 
+#define IPMI_IPMB_BROADCAST_ADDR_TYPE	0x41
+struct ipmi_ipmb_addr
+{
+	int           addr_type;
+	short         channel;
+	unsigned char slave_addr;
+	unsigned char lun;
+};
+
+/*
+ * A LAN Address.  This is an address to/from a LAN interface bridged
+ * by the BMC, not an address actually out on the LAN.
+ *
+ * A concious decision was made here to deviate slightly from the IPMI
+ * spec.  We do not use rqSWID and rsSWID like it shows in the
+ * message.  Instead, we use remote_SWID and local_SWID.  This means
+ * that any message (a request or response) from another device will
+ * always have exactly the same address.  If you didn't do this,
+ * requests and responses from the same device would have different
+ * addresses, and that's not too cool.
+ *
+ * In this address, the remote_SWID is always the SWID the remote
+ * message came from, or the SWID we are sending the message to.
+ * local_SWID is always our SWID.  Note that having our SWID in the
+ * message is a little weird, but this is required.
+ */
+#define IPMI_LAN_ADDR_TYPE		0x04
+struct ipmi_lan_addr
+{
+	int           addr_type;
+	short         channel;
+	unsigned char privilege;
+	unsigned char session_handle;
+	unsigned char remote_SWID;
+	unsigned char local_SWID;
+	unsigned char lun;
+};
+
+
+/*
+ * Channel for talking directly with the BMC.  When using this
+ * channel, This is for the system interface address type only.  FIXME
+ * - is this right, or should we use -1?
+ */
+#define IPMI_BMC_CHANNEL  0xf
+#define IPMI_NUM_CHANNELS 0x10
+
+
+/*
+ * A raw IPMI message without any addressing.  This covers both
+ * commands and responses.  The completion code is always the first
+ * byte of data in the response (as the spec shows the messages laid
+ * out).
+ */
+struct ipmi_msg
+{
+	unsigned char  netfn;
+	unsigned char  cmd;
+	unsigned short data_len;
+	unsigned char  __user *data;
+};
+
+struct kernel_ipmi_msg
+{
+	unsigned char  netfn;
+	unsigned char  cmd;
+	unsigned short data_len;
+	unsigned char  *data;
+};
+
+/*
+ * Various defines that are useful for IPMI applications.
+ */
+#define IPMI_INVALID_CMD_COMPLETION_CODE	0xC1
+#define IPMI_TIMEOUT_COMPLETION_CODE		0xC3
+#define IPMI_UNKNOWN_ERR_COMPLETION_CODE	0xff
+
+
+/*
+ * Receive types for messages coming from the receive interface.  This
+ * is used for the receive in-kernel interface and in the receive
+ * IOCTL.
+ *
+ * The "IPMI_RESPONSE_RESPNOSE_TYPE" is a little strange sounding, but
+ * it allows you to get the message results when you send a response
+ * message.
+ */
+#define IPMI_RESPONSE_RECV_TYPE		1 /* A response to a command */
+#define IPMI_ASYNC_EVENT_RECV_TYPE	2 /* Something from the event queue */
+#define IPMI_CMD_RECV_TYPE		3 /* A command from somewhere else */
+#define IPMI_RESPONSE_RESPONSE_TYPE	4 /* The response for
+					      a sent response, giving any
+					      error status for sending the
+					      response.  When you send a
+					      response message, this will
+					      be returned. */
+/* Note that async events and received commands do not have a completion
+   code as the first byte of the incoming data, unlike a response. */
+
+
+
+#ifdef __KERNEL__
+
+/*
+ * The in-kernel interface.
+ */
+#include <linux/list.h>
+#include <linux/module.h>
+
+/* Opaque type for a IPMI message user.  One of these is needed to
+   send and receive messages. */
+typedef struct ipmi_user *ipmi_user_t;
+
+/*
+ * Stuff coming from the receive interface comes as one of these.
+ * They are allocated, the receiver must free them with
+ * ipmi_free_recv_msg() when done with the message.  The link is not
+ * used after the message is delivered, so the upper layer may use the
+ * link to build a linked list, if it likes.
+ */
+struct ipmi_recv_msg
+{
+	struct list_head link;
+
+	/* The type of message as defined in the "Receive Types"
+           defines above. */
+	int              recv_type;
+
+	ipmi_user_t      user;
+	struct ipmi_addr addr;
+	long             msgid;
+	struct kernel_ipmi_msg  msg;
+
+	/* The user_msg_data is the data supplied when a message was
+	   sent, if this is a response to a sent message.  If this is
+	   not a response to a sent message, then user_msg_data will
+	   be NULL. */
+	void             *user_msg_data;
+
+	/* Call this when done with the message.  It will presumably free
+	   the message and do any other necessary cleanup. */
+	void (*done)(struct ipmi_recv_msg *msg);
+
+	/* Place-holder for the data, don't make any assumptions about
+	   the size or existance of this, since it may change. */
+	unsigned char   msg_data[IPMI_MAX_MSG_LENGTH];
+};
+
+/* Allocate and free the receive message. */
+static inline void ipmi_free_recv_msg(struct ipmi_recv_msg *msg)
+{
+	msg->done(msg);
+}
+
+struct ipmi_user_hndl
+{
+        /* Routine type to call when a message needs to be routed to
+	   the upper layer.  This will be called with some locks held,
+	   the only IPMI routines that can be called are ipmi_request
+	   and the alloc/free operations.  The handler_data is the
+	   variable supplied when the receive handler was registered. */
+	void (*ipmi_recv_hndl)(struct ipmi_recv_msg *msg,
+			       void                 *user_msg_data);
+
+	/* Called when the interface detects a watchdog pre-timeout.  If
+	   this is NULL, it will be ignored for the user. */
+	void (*ipmi_watchdog_pretimeout)(void *handler_data);
+};
+
+/* Create a new user of the IPMI layer on the given interface number. */
+int ipmi_create_user(unsigned int          if_num,
+		     struct ipmi_user_hndl *handler,
+		     void                  *handler_data,
+		     ipmi_user_t           *user);
+
+/* Destroy the given user of the IPMI layer.  Note that after this
+   function returns, the system is guaranteed to not call any
+   callbacks for the user.  Thus as long as you destroy all the users
+   before you unload a module, you will be safe.  And if you destroy
+   the users before you destroy the callback structures, it should be
+   safe, too. */
+int ipmi_destroy_user(ipmi_user_t user);
+
+/* Get the IPMI version of the BMC we are talking to. */
+void ipmi_get_version(ipmi_user_t   user,
+		      unsigned char *major,
+		      unsigned char *minor);
+
+/* Set and get the slave address and LUN that we will use for our
+   source messages.  Note that this affects the interface, not just
+   this user, so it will affect all users of this interface.  This is
+   so some initialization code can come in and do the OEM-specific
+   things it takes to determine your address (if not the BMC) and set
+   it for everyone else. */
+void ipmi_set_my_address(ipmi_user_t   user,
+			 unsigned char address);
+unsigned char ipmi_get_my_address(ipmi_user_t user);
+void ipmi_set_my_LUN(ipmi_user_t   user,
+		     unsigned char LUN);
+unsigned char ipmi_get_my_LUN(ipmi_user_t user);
+
+/*
+ * Like ipmi_request, but lets you specify the number of retries and
+ * the retry time.  The retries is the number of times the message
+ * will be resent if no reply is received.  If set to -1, the default
+ * value will be used.  The retry time is the time in milliseconds
+ * between retries.  If set to zero, the default value will be
+ * used.
+ *
+ * Don't use this unless you *really* have to.  It's primarily for the
+ * IPMI over LAN converter; since the LAN stuff does its own retries,
+ * it makes no sense to do it here.  However, this can be used if you
+ * have unusual requirements.
+ */
+int ipmi_request_settime(ipmi_user_t      user,
+			 struct ipmi_addr *addr,
+			 long             msgid,
+			 struct kernel_ipmi_msg  *msg,
+			 void             *user_msg_data,
+			 int              priority,
+			 int              max_retries,
+			 unsigned int     retry_time_ms);
+
+/*
+ * Like ipmi_request, but with messages supplied.  This will not
+ * allocate any memory, and the messages may be statically allocated
+ * (just make sure to do the "done" handling on them).  Note that this
+ * is primarily for the watchdog timer, since it should be able to
+ * send messages even if no memory is available.  This is subject to
+ * change as the system changes, so don't use it unless you REALLY
+ * have to.
+ */
+int ipmi_request_supply_msgs(ipmi_user_t          user,
+			     struct ipmi_addr     *addr,
+			     long                 msgid,
+			     struct kernel_ipmi_msg *msg,
+			     void                 *user_msg_data,
+			     void                 *supplied_smi,
+			     struct ipmi_recv_msg *supplied_recv,
+			     int                  priority);
+
+/*
+ * When commands come in to the SMS, the user can register to receive
+ * them.  Only one user can be listening on a specific netfn/cmd pair
+ * at a time, you will get an EBUSY error if the command is already
+ * registered.  If a command is received that does not have a user
+ * registered, the driver will automatically return the proper
+ * error.
+ */
+int ipmi_register_for_cmd(ipmi_user_t   user,
+			  unsigned char netfn,
+			  unsigned char cmd);
+int ipmi_unregister_for_cmd(ipmi_user_t   user,
+			    unsigned char netfn,
+			    unsigned char cmd);
+
+/*
+ * Allow run-to-completion mode to be set for the interface of
+ * a specific user.
+ */
+void ipmi_user_set_run_to_completion(ipmi_user_t user, int val);
+
+/*
+ * When the user is created, it will not receive IPMI events by
+ * default.  The user must set this to TRUE to get incoming events.
+ * The first user that sets this to TRUE will receive all events that
+ * have been queued while no one was waiting for events.
+ */
+int ipmi_set_gets_events(ipmi_user_t user, int val);
+
+/*
+ * Called when a new SMI is registered.  This will also be called on
+ * every existing interface when a new watcher is registered with
+ * ipmi_smi_watcher_register().
+ */
+struct ipmi_smi_watcher
+{
+	struct list_head link;
+
+	/* You must set the owner to the current module, if you are in
+	   a module (generally just set it to "THIS_MODULE"). */
+	struct module *owner;
+
+	/* These two are called with read locks held for the interface
+	   the watcher list.  So you can add and remove users from the
+	   IPMI interface, send messages, etc., but you cannot add
+	   or remove SMI watchers or SMI interfaces. */
+	void (*new_smi)(int if_num);
+	void (*smi_gone)(int if_num);
+};
+
+int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher);
+int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher);
+
+/* The following are various helper functions for dealing with IPMI
+   addresses. */
+
+/* Return the maximum length of an IPMI address given it's type. */
+unsigned int ipmi_addr_length(int addr_type);
+
+/* Validate that the given IPMI address is valid. */
+int ipmi_validate_addr(struct ipmi_addr *addr, int len);
+
+#endif /* __KERNEL__ */
+
+
+/*
+ * The userland interface
+ */
+
+/*
+ * The userland interface for the IPMI driver is a standard character
+ * device, with each instance of an interface registered as a minor
+ * number under the major character device.
+ *
+ * The read and write calls do not work, to get messages in and out
+ * requires ioctl calls because of the complexity of the data.  select
+ * and poll do work, so you can wait for input using the file
+ * descriptor, you just can use read to get it.
+ *
+ * In general, you send a command down to the interface and receive
+ * responses back.  You can use the msgid value to correlate commands
+ * and responses, the driver will take care of figuring out which
+ * incoming messages are for which command and find the proper msgid
+ * value to report.  You will only receive reponses for commands you
+ * send.  Asynchronous events, however, go to all open users, so you
+ * must be ready to handle these (or ignore them if you don't care).
+ *
+ * The address type depends upon the channel type.  When talking
+ * directly to the BMC (IPMC_BMC_CHANNEL), the address is ignored
+ * (IPMI_UNUSED_ADDR_TYPE).  When talking to an IPMB channel, you must
+ * supply a valid IPMB address with the addr_type set properly.
+ *
+ * When talking to normal channels, the driver takes care of the
+ * details of formatting and sending messages on that channel.  You do
+ * not, for instance, have to format a send command, you just send
+ * whatever command you want to the channel, the driver will create
+ * the send command, automatically issue receive command and get even
+ * commands, and pass those up to the proper user.
+ */
+
+
+/* The magic IOCTL value for this interface. */
+#define IPMI_IOC_MAGIC 'i'
+
+
+/* Messages sent to the interface are this format. */
+struct ipmi_req
+{
+	unsigned char __user *addr; /* Address to send the message to. */
+	unsigned int  addr_len;
+
+	long    msgid; /* The sequence number for the message.  This
+			  exact value will be reported back in the
+			  response to this request if it is a command.
+			  If it is a response, this will be used as
+			  the sequence value for the response.  */
+
+	struct ipmi_msg msg;
+};
+/*
+ * Send a message to the interfaces.  error values are:
+ *   - EFAULT - an address supplied was invalid.
+ *   - EINVAL - The address supplied was not valid, or the command
+ *              was not allowed.
+ *   - EMSGSIZE - The message to was too large.
+ *   - ENOMEM - Buffers could not be allocated for the command.
+ */
+#define IPMICTL_SEND_COMMAND		_IOR(IPMI_IOC_MAGIC, 13,	\
+					     struct ipmi_req)
+
+/* Messages sent to the interface with timing parameters are this
+   format. */
+struct ipmi_req_settime
+{
+	struct ipmi_req req;
+
+	/* See ipmi_request_settime() above for details on these
+           values. */
+	int          retries;
+	unsigned int retry_time_ms;
+};
+/*
+ * Send a message to the interfaces with timing parameters.  error values
+ * are:
+ *   - EFAULT - an address supplied was invalid.
+ *   - EINVAL - The address supplied was not valid, or the command
+ *              was not allowed.
+ *   - EMSGSIZE - The message to was too large.
+ *   - ENOMEM - Buffers could not be allocated for the command.
+ */
+#define IPMICTL_SEND_COMMAND_SETTIME	_IOR(IPMI_IOC_MAGIC, 21,	\
+					     struct ipmi_req_settime)
+
+/* Messages received from the interface are this format. */
+struct ipmi_recv
+{
+	int     recv_type; /* Is this a command, response or an
+			      asyncronous event. */
+
+	unsigned char __user *addr;    /* Address the message was from is put
+				   here.  The caller must supply the
+				   memory. */
+	unsigned int  addr_len; /* The size of the address buffer.
+				   The caller supplies the full buffer
+				   length, this value is updated to
+				   the actual message length when the
+				   message is received. */
+
+	long    msgid; /* The sequence number specified in the request
+			  if this is a response.  If this is a command,
+			  this will be the sequence number from the
+			  command. */
+
+	struct ipmi_msg msg; /* The data field must point to a buffer.
+				The data_size field must be set to the
+				size of the message buffer.  The
+				caller supplies the full buffer
+				length, this value is updated to the
+				actual message length when the message
+				is received. */
+};
+
+/*
+ * Receive a message.  error values:
+ *  - EAGAIN - no messages in the queue.
+ *  - EFAULT - an address supplied was invalid.
+ *  - EINVAL - The address supplied was not valid.
+ *  - EMSGSIZE - The message to was too large to fit into the message buffer,
+ *               the message will be left in the buffer. */
+#define IPMICTL_RECEIVE_MSG		_IOWR(IPMI_IOC_MAGIC, 12,	\
+					      struct ipmi_recv)
+
+/*
+ * Like RECEIVE_MSG, but if the message won't fit in the buffer, it
+ * will truncate the contents instead of leaving the data in the
+ * buffer.
+ */
+#define IPMICTL_RECEIVE_MSG_TRUNC	_IOWR(IPMI_IOC_MAGIC, 11,	\
+					      struct ipmi_recv)
+
+/* Register to get commands from other entities on this interface. */
+struct ipmi_cmdspec
+{
+	unsigned char netfn;
+	unsigned char cmd;
+};
+
+/* 
+ * Register to receive a specific command.  error values:
+ *   - EFAULT - an address supplied was invalid.
+ *   - EBUSY - The netfn/cmd supplied was already in use.
+ *   - ENOMEM - could not allocate memory for the entry.
+ */
+#define IPMICTL_REGISTER_FOR_CMD	_IOR(IPMI_IOC_MAGIC, 14,	\
+					     struct ipmi_cmdspec)
+/*
+ * Unregister a regsitered command.  error values:
+ *  - EFAULT - an address supplied was invalid.
+ *  - ENOENT - The netfn/cmd was not found registered for this user.
+ */
+#define IPMICTL_UNREGISTER_FOR_CMD	_IOR(IPMI_IOC_MAGIC, 15,	\
+					     struct ipmi_cmdspec)
+
+/* 
+ * Set whether this interface receives events.  Note that the first
+ * user registered for events will get all pending events for the
+ * interface.  error values:
+ *  - EFAULT - an address supplied was invalid.
+ */
+#define IPMICTL_SET_GETS_EVENTS_CMD	_IOR(IPMI_IOC_MAGIC, 16, int)
+
+/*
+ * Set and get the slave address and LUN that we will use for our
+ * source messages.  Note that this affects the interface, not just
+ * this user, so it will affect all users of this interface.  This is
+ * so some initialization code can come in and do the OEM-specific
+ * things it takes to determine your address (if not the BMC) and set
+ * it for everyone else.  You should probably leave the LUN alone.
+ */
+#define IPMICTL_SET_MY_ADDRESS_CMD	_IOR(IPMI_IOC_MAGIC, 17, unsigned int)
+#define IPMICTL_GET_MY_ADDRESS_CMD	_IOR(IPMI_IOC_MAGIC, 18, unsigned int)
+#define IPMICTL_SET_MY_LUN_CMD		_IOR(IPMI_IOC_MAGIC, 19, unsigned int)
+#define IPMICTL_GET_MY_LUN_CMD		_IOR(IPMI_IOC_MAGIC, 20, unsigned int)
+
+/*
+ * Get/set the default timing values for an interface.  You shouldn't
+ * generally mess with these.
+ */
+struct ipmi_timing_parms
+{
+	int          retries;
+	unsigned int retry_time_ms;
+};
+#define IPMICTL_SET_TIMING_PARMS_CMD	_IOR(IPMI_IOC_MAGIC, 22, \
+					     struct ipmi_timing_parms)
+#define IPMICTL_GET_TIMING_PARMS_CMD	_IOR(IPMI_IOC_MAGIC, 23, \
+					     struct ipmi_timing_parms)
+
+#endif /* __LINUX_IPMI_H */