include/linux/ipmi.h

   1 /*
   2  * ipmi.h
   3  *
   4  * MontaVista IPMI interface
   5  *
   6  * Author: MontaVista Software, Inc.
   7  *         Corey Minyard <minyard@mvista.com>
   8  *         source@mvista.com
   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_H
  35 #define __LINUX_IPMI_H
  36
  37 #include <linux/ipmi_msgdefs.h>
  38 #include <linux/compiler.h>
  39
  40 /*
  41  * This file describes an interface to an IPMI driver.  You have to
  42  * have a fairly good understanding of IPMI to use this, so go read
  43  * the specs first before actually trying to do anything.
  44  *
  45  * With that said, this driver provides a multi-user interface to the
  46  * IPMI driver, and it allows multiple IPMI physical interfaces below
  47  * the driver.  The physical interfaces bind as a lower layer on the
  48  * driver.  They appear as interfaces to the application using this
  49  * interface.
  50  *
  51  * Multi-user means that multiple applications may use the driver,
  52  * send commands, receive responses, etc.  The driver keeps track of
  53  * commands the user sends and tracks the responses.  The responses
  54  * will go back to the application that send the command.  If the
  55  * response doesn't come back in time, the driver will return a
  56  * timeout error response to the application.  Asynchronous events
  57  * from the BMC event queue will go to all users bound to the driver.
  58  * The incoming event queue in the BMC will automatically be flushed
  59  * if it becomes full and it is queried once a second to see if
  60  * anything is in it.  Incoming commands to the driver will get
  61  * delivered as commands.
  62  *
  63  * This driver provides two main interfaces: one for in-kernel
  64  * applications and another for userland applications.  The
  65  * capabilities are basically the same for both interface, although
  66  * the interfaces are somewhat different.  The stuff in the
  67  * #ifdef __KERNEL__ below is the in-kernel interface.  The userland
  68  * interface is defined later in the file.  */
  69
  70
  71
  72 /*
  73  * This is an overlay for all the address types, so it's easy to
  74  * determine the actual address type.  This is kind of like addresses
  75  * work for sockets.
  76  */
  77 #define IPMI_MAX_ADDR_SIZE 32
  78 struct ipmi_addr {
  79          /* Try to take these from the "Channel Medium Type" table
  80             in section 6.5 of the IPMI 1.5 manual. */
  81         int   addr_type;
  82         short channel;
  83         char  data[IPMI_MAX_ADDR_SIZE];
  84 };
  85
  86 /*
  87  * When the address is not used, the type will be set to this value.
  88  * The channel is the BMC's channel number for the channel (usually
  89  * 0), or IPMC_BMC_CHANNEL if communicating directly with the BMC.
  90  */
  91 #define IPMI_SYSTEM_INTERFACE_ADDR_TYPE 0x0c
  92 struct ipmi_system_interface_addr {
  93         int           addr_type;
  94         short         channel;
  95         unsigned char lun;
  96 };
  97
  98 /* An IPMB Address. */
  99 #define IPMI_IPMB_ADDR_TYPE             0x01
 100 /* Used for broadcast get device id as described in section 17.9 of the
 101    IPMI 1.5 manual. */
 102 #define IPMI_IPMB_BROADCAST_ADDR_TYPE   0x41
 103 struct ipmi_ipmb_addr {
 104         int           addr_type;
 105         short         channel;
 106         unsigned char slave_addr;
 107         unsigned char lun;
 108 };
 109
 110 /*
 111  * A LAN Address.  This is an address to/from a LAN interface bridged
 112  * by the BMC, not an address actually out on the LAN.
 113  *
 114  * A conscious decision was made here to deviate slightly from the IPMI
 115  * spec.  We do not use rqSWID and rsSWID like it shows in the
 116  * message.  Instead, we use remote_SWID and local_SWID.  This means
 117  * that any message (a request or response) from another device will
 118  * always have exactly the same address.  If you didn't do this,
 119  * requests and responses from the same device would have different
 120  * addresses, and that's not too cool.
 121  *
 122  * In this address, the remote_SWID is always the SWID the remote
 123  * message came from, or the SWID we are sending the message to.
 124  * local_SWID is always our SWID.  Note that having our SWID in the
 125  * message is a little weird, but this is required.
 126  */
 127 #define IPMI_LAN_ADDR_TYPE              0x04
 128 struct ipmi_lan_addr {
 129         int           addr_type;
 130         short         channel;
 131         unsigned char privilege;
 132         unsigned char session_handle;
 133         unsigned char remote_SWID;
 134         unsigned char local_SWID;
 135         unsigned char lun;
 136 };
 137
 138
 139 /*
 140  * Channel for talking directly with the BMC.  When using this
 141  * channel, This is for the system interface address type only.  FIXME
 142  * - is this right, or should we use -1?
 143  */
 144 #define IPMI_BMC_CHANNEL  0xf
 145 #define IPMI_NUM_CHANNELS 0x10
 146
 147 /*
 148  * Used to signify an "all channel" bitmask.  This is more than the
 149  * actual number of channels because this is used in userland and
 150  * will cover us if the number of channels is extended.
 151  */
 152 #define IPMI_CHAN_ALL     (~0)
 153
 154
 155 /*
 156  * A raw IPMI message without any addressing.  This covers both
 157  * commands and responses.  The completion code is always the first
 158  * byte of data in the response (as the spec shows the messages laid
 159  * out).
 160  */
 161 struct ipmi_msg {
 162         unsigned char  netfn;
 163         unsigned char  cmd;
 164         unsigned short data_len;
 165         unsigned char  __user *data;
 166 };
 167
 168 struct kernel_ipmi_msg {
 169         unsigned char  netfn;
 170         unsigned char  cmd;
 171         unsigned short data_len;
 172         unsigned char  *data;
 173 };
 174
 175 /*
 176  * Various defines that are useful for IPMI applications.
 177  */
 178 #define IPMI_INVALID_CMD_COMPLETION_CODE        0xC1
 179 #define IPMI_TIMEOUT_COMPLETION_CODE            0xC3
 180 #define IPMI_UNKNOWN_ERR_COMPLETION_CODE        0xff
 181
 182
 183 /*
 184  * Receive types for messages coming from the receive interface.  This
 185  * is used for the receive in-kernel interface and in the receive
 186  * IOCTL.
 187  *
 188  * The "IPMI_RESPONSE_RESPNOSE_TYPE" is a little strange sounding, but
 189  * it allows you to get the message results when you send a response
 190  * message.
 191  */
 192 #define IPMI_RESPONSE_RECV_TYPE         1 /* A response to a command */
 193 #define IPMI_ASYNC_EVENT_RECV_TYPE      2 /* Something from the event queue */
 194 #define IPMI_CMD_RECV_TYPE              3 /* A command from somewhere else */
 195 #define IPMI_RESPONSE_RESPONSE_TYPE     4 /* The response for
 196                                               a sent response, giving any
 197                                               error status for sending the
 198                                               response.  When you send a
 199                                               response message, this will
 200                                               be returned. */
 201 #define IPMI_OEM_RECV_TYPE              5 /* The response for OEM Channels */
 202
 203 /* Note that async events and received commands do not have a completion
 204    code as the first byte of the incoming data, unlike a response. */
 205
 206
 207 /*
 208  * Modes for ipmi_set_maint_mode() and the userland IOCTL.  The AUTO
 209  * setting is the default and means it will be set on certain
 210  * commands.  Hard setting it on and off will override automatic
 211  * operation.
 212  */
 213 #define IPMI_MAINTENANCE_MODE_AUTO      0
 214 #define IPMI_MAINTENANCE_MODE_OFF       1
 215 #define IPMI_MAINTENANCE_MODE_ON        2
 216
 217 #ifdef __KERNEL__
 218
 219 /*
 220  * The in-kernel interface.
 221  */
 222 #include <linux/list.h>
 223 #include <linux/proc_fs.h>
 224
 225 struct module;
 226 struct device;
 227
 228 /* Opaque type for a IPMI message user.  One of these is needed to
 229    send and receive messages. */
 230 typedef struct ipmi_user *ipmi_user_t;
 231
 232 /*
 233  * Stuff coming from the receive interface comes as one of these.
 234  * They are allocated, the receiver must free them with
 235  * ipmi_free_recv_msg() when done with the message.  The link is not
 236  * used after the message is delivered, so the upper layer may use the
 237  * link to build a linked list, if it likes.
 238  */
 239 struct ipmi_recv_msg {
 240         struct list_head link;
 241
 242         /* The type of message as defined in the "Receive Types"
 243            defines above. */
 244         int              recv_type;
 245
 246         ipmi_user_t      user;
 247         struct ipmi_addr addr;
 248         long             msgid;
 249         struct kernel_ipmi_msg  msg;
 250
 251         /* The user_msg_data is the data supplied when a message was
 252            sent, if this is a response to a sent message.  If this is
 253            not a response to a sent message, then user_msg_data will
 254            be NULL.  If the user above is NULL, then this will be the
 255            intf. */
 256         void             *user_msg_data;
 257
 258         /* Call this when done with the message.  It will presumably free
 259            the message and do any other necessary cleanup. */
 260         void (*done)(struct ipmi_recv_msg *msg);
 261
 262         /* Place-holder for the data, don't make any assumptions about
 263            the size or existence of this, since it may change. */
 264         unsigned char   msg_data[IPMI_MAX_MSG_LENGTH];
 265 };
 266
 267 /* Allocate and free the receive message. */
 268 void ipmi_free_recv_msg(struct ipmi_recv_msg *msg);
 269
 270 struct ipmi_user_hndl {
 271         /* Routine type to call when a message needs to be routed to
 272            the upper layer.  This will be called with some locks held,
 273            the only IPMI routines that can be called are ipmi_request
 274            and the alloc/free operations.  The handler_data is the
 275            variable supplied when the receive handler was registered. */
 276         void (*ipmi_recv_hndl)(struct ipmi_recv_msg *msg,
 277                                void                 *user_msg_data);
 278
 279         /* Called when the interface detects a watchdog pre-timeout.  If
 280            this is NULL, it will be ignored for the user. */
 281         void (*ipmi_watchdog_pretimeout)(void *handler_data);
 282 };
 283
 284 /* Create a new user of the IPMI layer on the given interface number. */
 285 int ipmi_create_user(unsigned int          if_num,
 286                      struct ipmi_user_hndl *handler,
 287                      void                  *handler_data,
 288                      ipmi_user_t           *user);
 289
 290 /* Destroy the given user of the IPMI layer.  Note that after this
 291    function returns, the system is guaranteed to not call any
 292    callbacks for the user.  Thus as long as you destroy all the users
 293    before you unload a module, you will be safe.  And if you destroy
 294    the users before you destroy the callback structures, it should be
 295    safe, too. */
 296 int ipmi_destroy_user(ipmi_user_t user);
 297
 298 /* Get the IPMI version of the BMC we are talking to. */
 299 void ipmi_get_version(ipmi_user_t   user,
 300                       unsigned char *major,
 301                       unsigned char *minor);
 302
 303 /* Set and get the slave address and LUN that we will use for our
 304    source messages.  Note that this affects the interface, not just
 305    this user, so it will affect all users of this interface.  This is
 306    so some initialization code can come in and do the OEM-specific
 307    things it takes to determine your address (if not the BMC) and set
 308    it for everyone else.  Note that each channel can have its own address. */
 309 int ipmi_set_my_address(ipmi_user_t   user,
 310                         unsigned int  channel,
 311                         unsigned char address);
 312 int ipmi_get_my_address(ipmi_user_t   user,
 313                         unsigned int  channel,
 314                         unsigned char *address);
 315 int ipmi_set_my_LUN(ipmi_user_t   user,
 316                     unsigned int  channel,
 317                     unsigned char LUN);
 318 int ipmi_get_my_LUN(ipmi_user_t   user,
 319                     unsigned int  channel,
 320                     unsigned char *LUN);
 321
 322 /*
 323  * Like ipmi_request, but lets you specify the number of retries and
 324  * the retry time.  The retries is the number of times the message
 325  * will be resent if no reply is received.  If set to -1, the default
 326  * value will be used.  The retry time is the time in milliseconds
 327  * between retries.  If set to zero, the default value will be
 328  * used.
 329  *
 330  * Don't use this unless you *really* have to.  It's primarily for the
 331  * IPMI over LAN converter; since the LAN stuff does its own retries,
 332  * it makes no sense to do it here.  However, this can be used if you
 333  * have unusual requirements.
 334  */
 335 int ipmi_request_settime(ipmi_user_t      user,
 336                          struct ipmi_addr *addr,
 337                          long             msgid,
 338                          struct kernel_ipmi_msg  *msg,
 339                          void             *user_msg_data,
 340                          int              priority,
 341                          int              max_retries,
 342                          unsigned int     retry_time_ms);
 343
 344 /*
 345  * Like ipmi_request, but with messages supplied.  This will not
 346  * allocate any memory, and the messages may be statically allocated
 347  * (just make sure to do the "done" handling on them).  Note that this
 348  * is primarily for the watchdog timer, since it should be able to
 349  * send messages even if no memory is available.  This is subject to
 350  * change as the system changes, so don't use it unless you REALLY
 351  * have to.
 352  */
 353 int ipmi_request_supply_msgs(ipmi_user_t          user,
 354                              struct ipmi_addr     *addr,
 355                              long                 msgid,
 356                              struct kernel_ipmi_msg *msg,
 357                              void                 *user_msg_data,
 358                              void                 *supplied_smi,
 359                              struct ipmi_recv_msg *supplied_recv,
 360                              int                  priority);
 361
 362 /*
 363  * Poll the IPMI interface for the user.  This causes the IPMI code to
 364  * do an immediate check for information from the driver and handle
 365  * anything that is immediately pending.  This will not block in any
 366  * way.  This is useful if you need to spin waiting for something to
 367  * happen in the IPMI driver.
 368  */
 369 void ipmi_poll_interface(ipmi_user_t user);
 370
 371 /*
 372  * When commands come in to the SMS, the user can register to receive
 373  * them.  Only one user can be listening on a specific netfn/cmd/chan tuple
 374  * at a time, you will get an EBUSY error if the command is already
 375  * registered.  If a command is received that does not have a user
 376  * registered, the driver will automatically return the proper
 377  * error.  Channels are specified as a bitfield, use IPMI_CHAN_ALL to
 378  * mean all channels.
 379  */
 380 int ipmi_register_for_cmd(ipmi_user_t   user,
 381                           unsigned char netfn,
 382                           unsigned char cmd,
 383                           unsigned int  chans);
 384 int ipmi_unregister_for_cmd(ipmi_user_t   user,
 385                             unsigned char netfn,
 386                             unsigned char cmd,
 387                             unsigned int  chans);
 388
 389 /*
 390  * Go into a mode where the driver will not autonomously attempt to do
 391  * things with the interface.  It will still respond to attentions and
 392  * interrupts, and it will expect that commands will complete.  It
 393  * will not automatcially check for flags, events, or things of that
 394  * nature.
 395  *
 396  * This is primarily used for firmware upgrades.  The idea is that
 397  * when you go into firmware upgrade mode, you do this operation
 398  * and the driver will not attempt to do anything but what you tell
 399  * it or what the BMC asks for.
 400  *
 401  * Note that if you send a command that resets the BMC, the driver
 402  * will still expect a response from that command.  So the BMC should
 403  * reset itself *after* the response is sent.  Resetting before the
 404  * response is just silly.
 405  *
 406  * If in auto maintenance mode, the driver will automatically go into
 407  * maintenance mode for 30 seconds if it sees a cold reset, a warm
 408  * reset, or a firmware NetFN.  This means that code that uses only
 409  * firmware NetFN commands to do upgrades will work automatically
 410  * without change, assuming it sends a message every 30 seconds or
 411  * less.
 412  *
 413  * See the IPMI_MAINTENANCE_MODE_xxx defines for what the mode means.
 414  */
 415 int ipmi_get_maintenance_mode(ipmi_user_t user);
 416 int ipmi_set_maintenance_mode(ipmi_user_t user, int mode);
 417
 418 /*
 419  * When the user is created, it will not receive IPMI events by
 420  * default.  The user must set this to TRUE to get incoming events.
 421  * The first user that sets this to TRUE will receive all events that
 422  * have been queued while no one was waiting for events.
 423  */
 424 int ipmi_set_gets_events(ipmi_user_t user, int val);
 425
 426 /*
 427  * Called when a new SMI is registered.  This will also be called on
 428  * every existing interface when a new watcher is registered with
 429  * ipmi_smi_watcher_register().
 430  */
 431 struct ipmi_smi_watcher {
 432         struct list_head link;
 433
 434         /* You must set the owner to the current module, if you are in
 435            a module (generally just set it to "THIS_MODULE"). */
 436         struct module *owner;
 437
 438         /* These two are called with read locks held for the interface
 439            the watcher list.  So you can add and remove users from the
 440            IPMI interface, send messages, etc., but you cannot add
 441            or remove SMI watchers or SMI interfaces. */
 442         void (*new_smi)(int if_num, struct device *dev);
 443         void (*smi_gone)(int if_num);
 444 };
 445
 446 int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher);
 447 int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher);
 448
 449 /* The following are various helper functions for dealing with IPMI
 450    addresses. */
 451
 452 /* Return the maximum length of an IPMI address given it's type. */
 453 unsigned int ipmi_addr_length(int addr_type);
 454
 455 /* Validate that the given IPMI address is valid. */
 456 int ipmi_validate_addr(struct ipmi_addr *addr, int len);
 457
 458 /*
 459  * How did the IPMI driver find out about the device?
 460  */
 461 enum ipmi_addr_src {
 462         SI_INVALID = 0, SI_HOTMOD, SI_HARDCODED, SI_SPMI, SI_ACPI, SI_SMBIOS,
 463         SI_PCI, SI_DEVICETREE, SI_DEFAULT
 464 };
 465
 466 union ipmi_smi_info_union {
 467         /*
 468          * the acpi_info element is defined for the SI_ACPI
 469          * address type
 470          */
 471         struct {
 472                 void *acpi_handle;
 473         } acpi_info;
 474 };
 475
 476 struct ipmi_smi_info {
 477         enum ipmi_addr_src addr_src;
 478
 479         /*
 480          * Base device for the interface.  Don't forget to put this when
 481          * you are done.
 482          */
 483         struct device *dev;
 484
 485         /*
 486          * The addr_info provides more detailed info for some IPMI
 487          * devices, depending on the addr_src.  Currently only SI_ACPI
 488          * info is provided.
 489          */
 490         union ipmi_smi_info_union addr_info;
 491 };
 492
 493 /* This is to get the private info of ipmi_smi_t */
 494 extern int ipmi_get_smi_info(int if_num, struct ipmi_smi_info *data);
 495
 496 #endif /* __KERNEL__ */
 497
 498
 499 /*
 500  * The userland interface
 501  */
 502
 503 /*
 504  * The userland interface for the IPMI driver is a standard character
 505  * device, with each instance of an interface registered as a minor
 506  * number under the major character device.
 507  *
 508  * The read and write calls do not work, to get messages in and out
 509  * requires ioctl calls because of the complexity of the data.  select
 510  * and poll do work, so you can wait for input using the file
 511  * descriptor, you just can use read to get it.
 512  *
 513  * In general, you send a command down to the interface and receive
 514  * responses back.  You can use the msgid value to correlate commands
 515  * and responses, the driver will take care of figuring out which
 516  * incoming messages are for which command and find the proper msgid
 517  * value to report.  You will only receive reponses for commands you
 518  * send.  Asynchronous events, however, go to all open users, so you
 519  * must be ready to handle these (or ignore them if you don't care).
 520  *
 521  * The address type depends upon the channel type.  When talking
 522  * directly to the BMC (IPMC_BMC_CHANNEL), the address is ignored
 523  * (IPMI_UNUSED_ADDR_TYPE).  When talking to an IPMB channel, you must
 524  * supply a valid IPMB address with the addr_type set properly.
 525  *
 526  * When talking to normal channels, the driver takes care of the
 527  * details of formatting and sending messages on that channel.  You do
 528  * not, for instance, have to format a send command, you just send
 529  * whatever command you want to the channel, the driver will create
 530  * the send command, automatically issue receive command and get even
 531  * commands, and pass those up to the proper user.
 532  */
 533
 534
 535 /* The magic IOCTL value for this interface. */
 536 #define IPMI_IOC_MAGIC 'i'
 537
 538
 539 /* Messages sent to the interface are this format. */
 540 struct ipmi_req {
 541         unsigned char __user *addr; /* Address to send the message to. */
 542         unsigned int  addr_len;
 543
 544         long    msgid; /* The sequence number for the message.  This
 545                           exact value will be reported back in the
 546                           response to this request if it is a command.
 547                           If it is a response, this will be used as
 548                           the sequence value for the response.  */
 549
 550         struct ipmi_msg msg;
 551 };
 552 /*
 553  * Send a message to the interfaces.  error values are:
 554  *   - EFAULT - an address supplied was invalid.
 555  *   - EINVAL - The address supplied was not valid, or the command
 556  *              was not allowed.
 557  *   - EMSGSIZE - The message to was too large.
 558  *   - ENOMEM - Buffers could not be allocated for the command.
 559  */
 560 #define IPMICTL_SEND_COMMAND            _IOR(IPMI_IOC_MAGIC, 13,        \
 561                                              struct ipmi_req)
 562
 563 /* Messages sent to the interface with timing parameters are this
 564    format. */
 565 struct ipmi_req_settime {
 566         struct ipmi_req req;
 567
 568         /* See ipmi_request_settime() above for details on these
 569            values. */
 570         int          retries;
 571         unsigned int retry_time_ms;
 572 };
 573 /*
 574  * Send a message to the interfaces with timing parameters.  error values
 575  * are:
 576  *   - EFAULT - an address supplied was invalid.
 577  *   - EINVAL - The address supplied was not valid, or the command
 578  *              was not allowed.
 579  *   - EMSGSIZE - The message to was too large.
 580  *   - ENOMEM - Buffers could not be allocated for the command.
 581  */
 582 #define IPMICTL_SEND_COMMAND_SETTIME    _IOR(IPMI_IOC_MAGIC, 21,        \
 583                                              struct ipmi_req_settime)
 584
 585 /* Messages received from the interface are this format. */
 586 struct ipmi_recv {
 587         int     recv_type; /* Is this a command, response or an
 588                               asyncronous event. */
 589
 590         unsigned char __user *addr;    /* Address the message was from is put
 591                                    here.  The caller must supply the
 592                                    memory. */
 593         unsigned int  addr_len; /* The size of the address buffer.
 594                                    The caller supplies the full buffer
 595                                    length, this value is updated to
 596                                    the actual message length when the
 597                                    message is received. */
 598
 599         long    msgid; /* The sequence number specified in the request
 600                           if this is a response.  If this is a command,
 601                           this will be the sequence number from the
 602                           command. */
 603
 604         struct ipmi_msg msg; /* The data field must point to a buffer.
 605                                 The data_size field must be set to the
 606                                 size of the message buffer.  The
 607                                 caller supplies the full buffer
 608                                 length, this value is updated to the
 609                                 actual message length when the message
 610                                 is received. */
 611 };
 612
 613 /*
 614  * Receive a message.  error values:
 615  *  - EAGAIN - no messages in the queue.
 616  *  - EFAULT - an address supplied was invalid.
 617  *  - EINVAL - The address supplied was not valid.
 618  *  - EMSGSIZE - The message to was too large to fit into the message buffer,
 619  *               the message will be left in the buffer. */
 620 #define IPMICTL_RECEIVE_MSG             _IOWR(IPMI_IOC_MAGIC, 12,       \
 621                                               struct ipmi_recv)
 622
 623 /*
 624  * Like RECEIVE_MSG, but if the message won't fit in the buffer, it
 625  * will truncate the contents instead of leaving the data in the
 626  * buffer.
 627  */
 628 #define IPMICTL_RECEIVE_MSG_TRUNC       _IOWR(IPMI_IOC_MAGIC, 11,       \
 629                                               struct ipmi_recv)
 630
 631 /* Register to get commands from other entities on this interface. */
 632 struct ipmi_cmdspec {
 633         unsigned char netfn;
 634         unsigned char cmd;
 635 };
 636
 637 /*
 638  * Register to receive a specific command.  error values:
 639  *   - EFAULT - an address supplied was invalid.
 640  *   - EBUSY - The netfn/cmd supplied was already in use.
 641  *   - ENOMEM - could not allocate memory for the entry.
 642  */
 643 #define IPMICTL_REGISTER_FOR_CMD        _IOR(IPMI_IOC_MAGIC, 14,        \
 644                                              struct ipmi_cmdspec)
 645 /*
 646  * Unregister a regsitered command.  error values:
 647  *  - EFAULT - an address supplied was invalid.
 648  *  - ENOENT - The netfn/cmd was not found registered for this user.
 649  */
 650 #define IPMICTL_UNREGISTER_FOR_CMD      _IOR(IPMI_IOC_MAGIC, 15,        \
 651                                              struct ipmi_cmdspec)
 652
 653 /*
 654  * Register to get commands from other entities on specific channels.
 655  * This way, you can only listen on specific channels, or have messages
 656  * from some channels go to one place and other channels to someplace
 657  * else.  The chans field is a bitmask, (1 << channel) for each channel.
 658  * It may be IPMI_CHAN_ALL for all channels.
 659  */
 660 struct ipmi_cmdspec_chans {
 661         unsigned int netfn;
 662         unsigned int cmd;
 663         unsigned int chans;
 664 };
 665
 666 /*
 667  * Register to receive a specific command on specific channels.  error values:
 668  *   - EFAULT - an address supplied was invalid.
 669  *   - EBUSY - One of the netfn/cmd/chans supplied was already in use.
 670  *   - ENOMEM - could not allocate memory for the entry.
 671  */
 672 #define IPMICTL_REGISTER_FOR_CMD_CHANS  _IOR(IPMI_IOC_MAGIC, 28,        \
 673                                              struct ipmi_cmdspec_chans)
 674 /*
 675  * Unregister some netfn/cmd/chans.  error values:
 676  *  - EFAULT - an address supplied was invalid.
 677  *  - ENOENT - None of the netfn/cmd/chans were found registered for this user.
 678  */
 679 #define IPMICTL_UNREGISTER_FOR_CMD_CHANS _IOR(IPMI_IOC_MAGIC, 29,       \
 680                                              struct ipmi_cmdspec_chans)
 681
 682 /*
 683  * Set whether this interface receives events.  Note that the first
 684  * user registered for events will get all pending events for the
 685  * interface.  error values:
 686  *  - EFAULT - an address supplied was invalid.
 687  */
 688 #define IPMICTL_SET_GETS_EVENTS_CMD     _IOR(IPMI_IOC_MAGIC, 16, int)
 689
 690 /*
 691  * Set and get the slave address and LUN that we will use for our
 692  * source messages.  Note that this affects the interface, not just
 693  * this user, so it will affect all users of this interface.  This is
 694  * so some initialization code can come in and do the OEM-specific
 695  * things it takes to determine your address (if not the BMC) and set
 696  * it for everyone else.  You should probably leave the LUN alone.
 697  */
 698 struct ipmi_channel_lun_address_set {
 699         unsigned short channel;
 700         unsigned char  value;
 701 };
 702 #define IPMICTL_SET_MY_CHANNEL_ADDRESS_CMD \
 703         _IOR(IPMI_IOC_MAGIC, 24, struct ipmi_channel_lun_address_set)
 704 #define IPMICTL_GET_MY_CHANNEL_ADDRESS_CMD \
 705         _IOR(IPMI_IOC_MAGIC, 25, struct ipmi_channel_lun_address_set)
 706 #define IPMICTL_SET_MY_CHANNEL_LUN_CMD \
 707         _IOR(IPMI_IOC_MAGIC, 26, struct ipmi_channel_lun_address_set)
 708 #define IPMICTL_GET_MY_CHANNEL_LUN_CMD \
 709         _IOR(IPMI_IOC_MAGIC, 27, struct ipmi_channel_lun_address_set)
 710 /* Legacy interfaces, these only set IPMB 0. */
 711 #define IPMICTL_SET_MY_ADDRESS_CMD      _IOR(IPMI_IOC_MAGIC, 17, unsigned int)
 712 #define IPMICTL_GET_MY_ADDRESS_CMD      _IOR(IPMI_IOC_MAGIC, 18, unsigned int)
 713 #define IPMICTL_SET_MY_LUN_CMD          _IOR(IPMI_IOC_MAGIC, 19, unsigned int)
 714 #define IPMICTL_GET_MY_LUN_CMD          _IOR(IPMI_IOC_MAGIC, 20, unsigned int)
 715
 716 /*
 717  * Get/set the default timing values for an interface.  You shouldn't
 718  * generally mess with these.
 719  */
 720 struct ipmi_timing_parms {
 721         int          retries;
 722         unsigned int retry_time_ms;
 723 };
 724 #define IPMICTL_SET_TIMING_PARMS_CMD    _IOR(IPMI_IOC_MAGIC, 22, \
 725                                              struct ipmi_timing_parms)
 726 #define IPMICTL_GET_TIMING_PARMS_CMD    _IOR(IPMI_IOC_MAGIC, 23, \
 727                                              struct ipmi_timing_parms)
 728
 729 /*
 730  * Set the maintenance mode.  See ipmi_set_maintenance_mode() above
 731  * for a description of what this does.
 732  */
 733 #define IPMICTL_GET_MAINTENANCE_MODE_CMD        _IOR(IPMI_IOC_MAGIC, 30, int)
 734 #define IPMICTL_SET_MAINTENANCE_MODE_CMD        _IOW(IPMI_IOC_MAGIC, 31, int)
 735
 736 #endif /* __LINUX_IPMI_H */