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* Incoming and outgoing message routing for an IPMI interface.
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* Author: MontaVista Software, Inc.
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* Corey Minyard <minyard@mvista.com>
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* Copyright 2002 MontaVista Software Inc.
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <asm/system.h>
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#include <linux/poll.h>
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#include <linux/sched.h>
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#include <linux/seq_file.h>
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#include <linux/spinlock.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/ipmi.h>
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#include <linux/ipmi_smi.h>
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#include <linux/notifier.h>
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#include <linux/init.h>
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#include <linux/proc_fs.h>
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#include <linux/rcupdate.h>
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#define PFX "IPMI message handler: "
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#define IPMI_DRIVER_VERSION "39.2"
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static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void);
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static int ipmi_init_msghandler(void);
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static int initialized;
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static struct proc_dir_entry *proc_ipmi_root;
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#endif /* CONFIG_PROC_FS */
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/* Remain in auto-maintenance mode for this amount of time (in ms). */
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#define IPMI_MAINTENANCE_MODE_TIMEOUT 30000
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#define MAX_EVENTS_IN_QUEUE 25
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* Don't let a message sit in a queue forever, always time it with at lest
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* the max message timer. This is in milliseconds.
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#define MAX_MSG_TIMEOUT 60000
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* The main "user" data structure.
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struct list_head link;
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/* Set to "0" when the user is destroyed. */
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/* The upper layer that handles receive messages. */
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struct ipmi_user_hndl *handler;
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/* The interface this user is bound to. */
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/* Does this interface receive IPMI events? */
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struct list_head link;
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* This is used to form a linked lised during mass deletion.
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* Since this is in an RCU list, we cannot use the link above
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* or change any data until the RCU period completes. So we
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* use this next variable during mass deletion so we can have
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* a list and don't have to wait and restart the search on
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* every individual deletion of a command.
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struct cmd_rcvr *next;
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unsigned int inuse : 1;
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unsigned int broadcast : 1;
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unsigned long timeout;
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unsigned long orig_timeout;
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unsigned int retries_left;
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* To verify on an incoming send message response that this is
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* the message that the response is for, we keep a sequence id
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* and increment it every time we send a message.
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* This is held so we can properly respond to the message on a
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* timeout, and it is used to hold the temporary data for
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* retransmission, too.
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struct ipmi_recv_msg *recv_msg;
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* Store the information in a msgid (long) to allow us to find a
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* sequence table entry from the msgid.
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#define STORE_SEQ_IN_MSGID(seq, seqid) (((seq&0xff)<<26) | (seqid&0x3ffffff))
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#define GET_SEQ_FROM_MSGID(msgid, seq, seqid) \
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seq = ((msgid >> 26) & 0x3f); \
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seqid = (msgid & 0x3fffff); \
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#define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3fffff)
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struct ipmi_channel {
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unsigned char medium;
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unsigned char protocol;
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* My slave address. This is initialized to IPMI_BMC_SLAVE_ADDR,
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* but may be changed by the user.
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unsigned char address;
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* My LUN. This should generally stay the SMS LUN, but just in
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#ifdef CONFIG_PROC_FS
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struct ipmi_proc_entry {
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struct ipmi_proc_entry *next;
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struct platform_device *dev;
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struct ipmi_device_id id;
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unsigned char guid[16];
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struct kref refcount;
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/* bmc device attributes */
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struct device_attribute device_id_attr;
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struct device_attribute provides_dev_sdrs_attr;
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struct device_attribute revision_attr;
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struct device_attribute firmware_rev_attr;
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struct device_attribute version_attr;
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struct device_attribute add_dev_support_attr;
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struct device_attribute manufacturer_id_attr;
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struct device_attribute product_id_attr;
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struct device_attribute guid_attr;
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struct device_attribute aux_firmware_rev_attr;
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* Various statistics for IPMI, these index stats[] in the ipmi_smi
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enum ipmi_stat_indexes {
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/* Commands we got from the user that were invalid. */
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IPMI_STAT_sent_invalid_commands = 0,
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/* Commands we sent to the MC. */
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IPMI_STAT_sent_local_commands,
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/* Responses from the MC that were delivered to a user. */
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IPMI_STAT_handled_local_responses,
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/* Responses from the MC that were not delivered to a user. */
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IPMI_STAT_unhandled_local_responses,
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/* Commands we sent out to the IPMB bus. */
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IPMI_STAT_sent_ipmb_commands,
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/* Commands sent on the IPMB that had errors on the SEND CMD */
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IPMI_STAT_sent_ipmb_command_errs,
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/* Each retransmit increments this count. */
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IPMI_STAT_retransmitted_ipmb_commands,
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* When a message times out (runs out of retransmits) this is
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IPMI_STAT_timed_out_ipmb_commands,
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* This is like above, but for broadcasts. Broadcasts are
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* *not* included in the above count (they are expected to
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IPMI_STAT_timed_out_ipmb_broadcasts,
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/* Responses I have sent to the IPMB bus. */
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IPMI_STAT_sent_ipmb_responses,
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/* The response was delivered to the user. */
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IPMI_STAT_handled_ipmb_responses,
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/* The response had invalid data in it. */
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IPMI_STAT_invalid_ipmb_responses,
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/* The response didn't have anyone waiting for it. */
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IPMI_STAT_unhandled_ipmb_responses,
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/* Commands we sent out to the IPMB bus. */
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IPMI_STAT_sent_lan_commands,
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/* Commands sent on the IPMB that had errors on the SEND CMD */
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IPMI_STAT_sent_lan_command_errs,
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/* Each retransmit increments this count. */
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IPMI_STAT_retransmitted_lan_commands,
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* When a message times out (runs out of retransmits) this is
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IPMI_STAT_timed_out_lan_commands,
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/* Responses I have sent to the IPMB bus. */
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IPMI_STAT_sent_lan_responses,
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/* The response was delivered to the user. */
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IPMI_STAT_handled_lan_responses,
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/* The response had invalid data in it. */
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IPMI_STAT_invalid_lan_responses,
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/* The response didn't have anyone waiting for it. */
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IPMI_STAT_unhandled_lan_responses,
275
/* The command was delivered to the user. */
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IPMI_STAT_handled_commands,
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/* The command had invalid data in it. */
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IPMI_STAT_invalid_commands,
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/* The command didn't have anyone waiting for it. */
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IPMI_STAT_unhandled_commands,
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/* Invalid data in an event. */
285
IPMI_STAT_invalid_events,
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/* Events that were received with the proper format. */
290
/* Retransmissions on IPMB that failed. */
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IPMI_STAT_dropped_rexmit_ipmb_commands,
293
/* Retransmissions on LAN that failed. */
294
IPMI_STAT_dropped_rexmit_lan_commands,
296
/* This *must* remain last, add new values above this. */
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#define IPMI_IPMB_NUM_SEQ 64
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#define IPMI_MAX_CHANNELS 16
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/* What interface number are we? */
307
struct kref refcount;
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/* Used for a list of interfaces. */
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struct list_head link;
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* The list of upper layers that are using me. seq_lock
316
struct list_head users;
318
/* Information to supply to users. */
319
unsigned char ipmi_version_major;
320
unsigned char ipmi_version_minor;
322
/* Used for wake ups at startup. */
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wait_queue_head_t waitq;
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struct bmc_device *bmc;
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* This is the lower-layer's sender routine. Note that you
331
* must either be holding the ipmi_interfaces_mutex or be in
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* an umpreemptible region to use this. You must fetch the
333
* value into a local variable and make sure it is not NULL.
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struct ipmi_smi_handlers *handlers;
338
#ifdef CONFIG_PROC_FS
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/* A list of proc entries for this interface. */
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struct mutex proc_entry_lock;
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struct ipmi_proc_entry *proc_entries;
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/* Driver-model device for the system interface. */
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struct device *si_dev;
348
* A table of sequence numbers for this interface. We use the
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* sequence numbers for IPMB messages that go out of the
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* interface to match them up with their responses. A routine
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* is called periodically to time the items in this list.
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struct seq_table seq_table[IPMI_IPMB_NUM_SEQ];
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* Messages that were delayed for some reason (out of memory,
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* for instance), will go in here to be processed later in a
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* periodic timer interrupt.
362
spinlock_t waiting_msgs_lock;
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struct list_head waiting_msgs;
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* The list of command receivers that are registered for commands
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struct mutex cmd_rcvrs_mutex;
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struct list_head cmd_rcvrs;
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* Events that were queues because no one was there to receive
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spinlock_t events_lock; /* For dealing with event stuff. */
377
struct list_head waiting_events;
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unsigned int waiting_events_count; /* How many events in queue? */
379
char delivering_events;
380
char event_msg_printed;
383
* The event receiver for my BMC, only really used at panic
384
* shutdown as a place to store this.
386
unsigned char event_receiver;
387
unsigned char event_receiver_lun;
388
unsigned char local_sel_device;
389
unsigned char local_event_generator;
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/* For handling of maintenance mode. */
392
int maintenance_mode;
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int maintenance_mode_enable;
394
int auto_maintenance_timeout;
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spinlock_t maintenance_mode_lock; /* Used in a timer... */
398
* A cheap hack, if this is non-null and a message to an
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* interface comes in with a NULL user, call this routine with
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* it. Note that the message will still be freed by the
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* caller. This only works on the system interface.
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void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_recv_msg *msg);
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* When we are scanning the channels for an SMI, this will
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* tell which channel we are scanning.
411
/* Channel information */
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struct ipmi_channel channels[IPMI_MAX_CHANNELS];
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struct proc_dir_entry *proc_dir;
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char proc_dir_name[10];
418
atomic_t stats[IPMI_NUM_STATS];
421
* run_to_completion duplicate of smb_info, smi_info
422
* and ipmi_serial_info structures. Used to decrease numbers of
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* parameters passed by "low" level IPMI code.
425
int run_to_completion;
427
#define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev)
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* The driver model view of the IPMI messaging driver.
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static struct platform_driver ipmidriver = {
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.bus = &platform_bus_type
438
static DEFINE_MUTEX(ipmidriver_mutex);
440
static LIST_HEAD(ipmi_interfaces);
441
static DEFINE_MUTEX(ipmi_interfaces_mutex);
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* List of watchers that want to know when smi's are added and deleted.
446
static LIST_HEAD(smi_watchers);
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static DEFINE_MUTEX(smi_watchers_mutex);
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#define ipmi_inc_stat(intf, stat) \
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atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat])
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#define ipmi_get_stat(intf, stat) \
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((unsigned int) atomic_read(&(intf)->stats[IPMI_STAT_ ## stat]))
455
static int is_lan_addr(struct ipmi_addr *addr)
457
return addr->addr_type == IPMI_LAN_ADDR_TYPE;
460
static int is_ipmb_addr(struct ipmi_addr *addr)
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return addr->addr_type == IPMI_IPMB_ADDR_TYPE;
465
static int is_ipmb_bcast_addr(struct ipmi_addr *addr)
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return addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE;
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static void free_recv_msg_list(struct list_head *q)
472
struct ipmi_recv_msg *msg, *msg2;
474
list_for_each_entry_safe(msg, msg2, q, link) {
475
list_del(&msg->link);
476
ipmi_free_recv_msg(msg);
480
static void free_smi_msg_list(struct list_head *q)
482
struct ipmi_smi_msg *msg, *msg2;
484
list_for_each_entry_safe(msg, msg2, q, link) {
485
list_del(&msg->link);
486
ipmi_free_smi_msg(msg);
490
static void clean_up_interface_data(ipmi_smi_t intf)
493
struct cmd_rcvr *rcvr, *rcvr2;
494
struct list_head list;
496
free_smi_msg_list(&intf->waiting_msgs);
497
free_recv_msg_list(&intf->waiting_events);
500
* Wholesale remove all the entries from the list in the
501
* interface and wait for RCU to know that none are in use.
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mutex_lock(&intf->cmd_rcvrs_mutex);
504
INIT_LIST_HEAD(&list);
505
list_splice_init_rcu(&intf->cmd_rcvrs, &list, synchronize_rcu);
506
mutex_unlock(&intf->cmd_rcvrs_mutex);
508
list_for_each_entry_safe(rcvr, rcvr2, &list, link)
511
for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
512
if ((intf->seq_table[i].inuse)
513
&& (intf->seq_table[i].recv_msg))
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ipmi_free_recv_msg(intf->seq_table[i].recv_msg);
518
static void intf_free(struct kref *ref)
520
ipmi_smi_t intf = container_of(ref, struct ipmi_smi, refcount);
522
clean_up_interface_data(intf);
526
struct watcher_entry {
529
struct list_head link;
532
int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher)
535
LIST_HEAD(to_deliver);
536
struct watcher_entry *e, *e2;
538
mutex_lock(&smi_watchers_mutex);
540
mutex_lock(&ipmi_interfaces_mutex);
542
/* Build a list of things to deliver. */
543
list_for_each_entry(intf, &ipmi_interfaces, link) {
544
if (intf->intf_num == -1)
546
e = kmalloc(sizeof(*e), GFP_KERNEL);
549
kref_get(&intf->refcount);
551
e->intf_num = intf->intf_num;
552
list_add_tail(&e->link, &to_deliver);
555
/* We will succeed, so add it to the list. */
556
list_add(&watcher->link, &smi_watchers);
558
mutex_unlock(&ipmi_interfaces_mutex);
560
list_for_each_entry_safe(e, e2, &to_deliver, link) {
562
watcher->new_smi(e->intf_num, e->intf->si_dev);
563
kref_put(&e->intf->refcount, intf_free);
567
mutex_unlock(&smi_watchers_mutex);
572
mutex_unlock(&ipmi_interfaces_mutex);
573
mutex_unlock(&smi_watchers_mutex);
574
list_for_each_entry_safe(e, e2, &to_deliver, link) {
576
kref_put(&e->intf->refcount, intf_free);
581
EXPORT_SYMBOL(ipmi_smi_watcher_register);
583
int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher)
585
mutex_lock(&smi_watchers_mutex);
586
list_del(&(watcher->link));
587
mutex_unlock(&smi_watchers_mutex);
590
EXPORT_SYMBOL(ipmi_smi_watcher_unregister);
593
* Must be called with smi_watchers_mutex held.
596
call_smi_watchers(int i, struct device *dev)
598
struct ipmi_smi_watcher *w;
600
list_for_each_entry(w, &smi_watchers, link) {
601
if (try_module_get(w->owner)) {
603
module_put(w->owner);
609
ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2)
611
if (addr1->addr_type != addr2->addr_type)
614
if (addr1->channel != addr2->channel)
617
if (addr1->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
618
struct ipmi_system_interface_addr *smi_addr1
619
= (struct ipmi_system_interface_addr *) addr1;
620
struct ipmi_system_interface_addr *smi_addr2
621
= (struct ipmi_system_interface_addr *) addr2;
622
return (smi_addr1->lun == smi_addr2->lun);
625
if (is_ipmb_addr(addr1) || is_ipmb_bcast_addr(addr1)) {
626
struct ipmi_ipmb_addr *ipmb_addr1
627
= (struct ipmi_ipmb_addr *) addr1;
628
struct ipmi_ipmb_addr *ipmb_addr2
629
= (struct ipmi_ipmb_addr *) addr2;
631
return ((ipmb_addr1->slave_addr == ipmb_addr2->slave_addr)
632
&& (ipmb_addr1->lun == ipmb_addr2->lun));
635
if (is_lan_addr(addr1)) {
636
struct ipmi_lan_addr *lan_addr1
637
= (struct ipmi_lan_addr *) addr1;
638
struct ipmi_lan_addr *lan_addr2
639
= (struct ipmi_lan_addr *) addr2;
641
return ((lan_addr1->remote_SWID == lan_addr2->remote_SWID)
642
&& (lan_addr1->local_SWID == lan_addr2->local_SWID)
643
&& (lan_addr1->session_handle
644
== lan_addr2->session_handle)
645
&& (lan_addr1->lun == lan_addr2->lun));
651
int ipmi_validate_addr(struct ipmi_addr *addr, int len)
653
if (len < sizeof(struct ipmi_system_interface_addr))
656
if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
657
if (addr->channel != IPMI_BMC_CHANNEL)
662
if ((addr->channel == IPMI_BMC_CHANNEL)
663
|| (addr->channel >= IPMI_MAX_CHANNELS)
664
|| (addr->channel < 0))
667
if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) {
668
if (len < sizeof(struct ipmi_ipmb_addr))
673
if (is_lan_addr(addr)) {
674
if (len < sizeof(struct ipmi_lan_addr))
681
EXPORT_SYMBOL(ipmi_validate_addr);
683
unsigned int ipmi_addr_length(int addr_type)
685
if (addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
686
return sizeof(struct ipmi_system_interface_addr);
688
if ((addr_type == IPMI_IPMB_ADDR_TYPE)
689
|| (addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE))
690
return sizeof(struct ipmi_ipmb_addr);
692
if (addr_type == IPMI_LAN_ADDR_TYPE)
693
return sizeof(struct ipmi_lan_addr);
697
EXPORT_SYMBOL(ipmi_addr_length);
699
static void deliver_response(struct ipmi_recv_msg *msg)
702
ipmi_smi_t intf = msg->user_msg_data;
704
/* Special handling for NULL users. */
705
if (intf->null_user_handler) {
706
intf->null_user_handler(intf, msg);
707
ipmi_inc_stat(intf, handled_local_responses);
709
/* No handler, so give up. */
710
ipmi_inc_stat(intf, unhandled_local_responses);
712
ipmi_free_recv_msg(msg);
714
ipmi_user_t user = msg->user;
715
user->handler->ipmi_recv_hndl(msg, user->handler_data);
720
deliver_err_response(struct ipmi_recv_msg *msg, int err)
722
msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
723
msg->msg_data[0] = err;
724
msg->msg.netfn |= 1; /* Convert to a response. */
725
msg->msg.data_len = 1;
726
msg->msg.data = msg->msg_data;
727
deliver_response(msg);
731
* Find the next sequence number not being used and add the given
732
* message with the given timeout to the sequence table. This must be
733
* called with the interface's seq_lock held.
735
static int intf_next_seq(ipmi_smi_t intf,
736
struct ipmi_recv_msg *recv_msg,
737
unsigned long timeout,
746
for (i = intf->curr_seq; (i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq;
747
i = (i+1)%IPMI_IPMB_NUM_SEQ) {
748
if (!intf->seq_table[i].inuse)
752
if (!intf->seq_table[i].inuse) {
753
intf->seq_table[i].recv_msg = recv_msg;
756
* Start with the maximum timeout, when the send response
757
* comes in we will start the real timer.
759
intf->seq_table[i].timeout = MAX_MSG_TIMEOUT;
760
intf->seq_table[i].orig_timeout = timeout;
761
intf->seq_table[i].retries_left = retries;
762
intf->seq_table[i].broadcast = broadcast;
763
intf->seq_table[i].inuse = 1;
764
intf->seq_table[i].seqid = NEXT_SEQID(intf->seq_table[i].seqid);
766
*seqid = intf->seq_table[i].seqid;
767
intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ;
776
* Return the receive message for the given sequence number and
777
* release the sequence number so it can be reused. Some other data
778
* is passed in to be sure the message matches up correctly (to help
779
* guard against message coming in after their timeout and the
780
* sequence number being reused).
782
static int intf_find_seq(ipmi_smi_t intf,
787
struct ipmi_addr *addr,
788
struct ipmi_recv_msg **recv_msg)
793
if (seq >= IPMI_IPMB_NUM_SEQ)
796
spin_lock_irqsave(&(intf->seq_lock), flags);
797
if (intf->seq_table[seq].inuse) {
798
struct ipmi_recv_msg *msg = intf->seq_table[seq].recv_msg;
800
if ((msg->addr.channel == channel) && (msg->msg.cmd == cmd)
801
&& (msg->msg.netfn == netfn)
802
&& (ipmi_addr_equal(addr, &(msg->addr)))) {
804
intf->seq_table[seq].inuse = 0;
808
spin_unlock_irqrestore(&(intf->seq_lock), flags);
814
/* Start the timer for a specific sequence table entry. */
815
static int intf_start_seq_timer(ipmi_smi_t intf,
824
GET_SEQ_FROM_MSGID(msgid, seq, seqid);
826
spin_lock_irqsave(&(intf->seq_lock), flags);
828
* We do this verification because the user can be deleted
829
* while a message is outstanding.
831
if ((intf->seq_table[seq].inuse)
832
&& (intf->seq_table[seq].seqid == seqid)) {
833
struct seq_table *ent = &(intf->seq_table[seq]);
834
ent->timeout = ent->orig_timeout;
837
spin_unlock_irqrestore(&(intf->seq_lock), flags);
842
/* Got an error for the send message for a specific sequence number. */
843
static int intf_err_seq(ipmi_smi_t intf,
851
struct ipmi_recv_msg *msg = NULL;
854
GET_SEQ_FROM_MSGID(msgid, seq, seqid);
856
spin_lock_irqsave(&(intf->seq_lock), flags);
858
* We do this verification because the user can be deleted
859
* while a message is outstanding.
861
if ((intf->seq_table[seq].inuse)
862
&& (intf->seq_table[seq].seqid == seqid)) {
863
struct seq_table *ent = &(intf->seq_table[seq]);
869
spin_unlock_irqrestore(&(intf->seq_lock), flags);
872
deliver_err_response(msg, err);
878
int ipmi_create_user(unsigned int if_num,
879
struct ipmi_user_hndl *handler,
884
ipmi_user_t new_user;
889
* There is no module usecount here, because it's not
890
* required. Since this can only be used by and called from
891
* other modules, they will implicitly use this module, and
892
* thus this can't be removed unless the other modules are
900
* Make sure the driver is actually initialized, this handles
901
* problems with initialization order.
904
rv = ipmi_init_msghandler();
909
* The init code doesn't return an error if it was turned
910
* off, but it won't initialize. Check that.
916
new_user = kmalloc(sizeof(*new_user), GFP_KERNEL);
920
mutex_lock(&ipmi_interfaces_mutex);
921
list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
922
if (intf->intf_num == if_num)
925
/* Not found, return an error */
930
/* Note that each existing user holds a refcount to the interface. */
931
kref_get(&intf->refcount);
933
kref_init(&new_user->refcount);
934
new_user->handler = handler;
935
new_user->handler_data = handler_data;
936
new_user->intf = intf;
937
new_user->gets_events = 0;
939
if (!try_module_get(intf->handlers->owner)) {
944
if (intf->handlers->inc_usecount) {
945
rv = intf->handlers->inc_usecount(intf->send_info);
947
module_put(intf->handlers->owner);
953
* Hold the lock so intf->handlers is guaranteed to be good
956
mutex_unlock(&ipmi_interfaces_mutex);
959
spin_lock_irqsave(&intf->seq_lock, flags);
960
list_add_rcu(&new_user->link, &intf->users);
961
spin_unlock_irqrestore(&intf->seq_lock, flags);
966
kref_put(&intf->refcount, intf_free);
968
mutex_unlock(&ipmi_interfaces_mutex);
972
EXPORT_SYMBOL(ipmi_create_user);
974
int ipmi_get_smi_info(int if_num, struct ipmi_smi_info *data)
978
struct ipmi_smi_handlers *handlers;
980
mutex_lock(&ipmi_interfaces_mutex);
981
list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
982
if (intf->intf_num == if_num)
985
/* Not found, return an error */
987
mutex_unlock(&ipmi_interfaces_mutex);
991
handlers = intf->handlers;
993
if (handlers->get_smi_info)
994
rv = handlers->get_smi_info(intf->send_info, data);
995
mutex_unlock(&ipmi_interfaces_mutex);
999
EXPORT_SYMBOL(ipmi_get_smi_info);
1001
static void free_user(struct kref *ref)
1003
ipmi_user_t user = container_of(ref, struct ipmi_user, refcount);
1007
int ipmi_destroy_user(ipmi_user_t user)
1009
ipmi_smi_t intf = user->intf;
1011
unsigned long flags;
1012
struct cmd_rcvr *rcvr;
1013
struct cmd_rcvr *rcvrs = NULL;
1017
/* Remove the user from the interface's sequence table. */
1018
spin_lock_irqsave(&intf->seq_lock, flags);
1019
list_del_rcu(&user->link);
1021
for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
1022
if (intf->seq_table[i].inuse
1023
&& (intf->seq_table[i].recv_msg->user == user)) {
1024
intf->seq_table[i].inuse = 0;
1025
ipmi_free_recv_msg(intf->seq_table[i].recv_msg);
1028
spin_unlock_irqrestore(&intf->seq_lock, flags);
1031
* Remove the user from the command receiver's table. First
1032
* we build a list of everything (not using the standard link,
1033
* since other things may be using it till we do
1034
* synchronize_rcu()) then free everything in that list.
1036
mutex_lock(&intf->cmd_rcvrs_mutex);
1037
list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
1038
if (rcvr->user == user) {
1039
list_del_rcu(&rcvr->link);
1044
mutex_unlock(&intf->cmd_rcvrs_mutex);
1052
mutex_lock(&ipmi_interfaces_mutex);
1053
if (intf->handlers) {
1054
module_put(intf->handlers->owner);
1055
if (intf->handlers->dec_usecount)
1056
intf->handlers->dec_usecount(intf->send_info);
1058
mutex_unlock(&ipmi_interfaces_mutex);
1060
kref_put(&intf->refcount, intf_free);
1062
kref_put(&user->refcount, free_user);
1066
EXPORT_SYMBOL(ipmi_destroy_user);
1068
void ipmi_get_version(ipmi_user_t user,
1069
unsigned char *major,
1070
unsigned char *minor)
1072
*major = user->intf->ipmi_version_major;
1073
*minor = user->intf->ipmi_version_minor;
1075
EXPORT_SYMBOL(ipmi_get_version);
1077
int ipmi_set_my_address(ipmi_user_t user,
1078
unsigned int channel,
1079
unsigned char address)
1081
if (channel >= IPMI_MAX_CHANNELS)
1083
user->intf->channels[channel].address = address;
1086
EXPORT_SYMBOL(ipmi_set_my_address);
1088
int ipmi_get_my_address(ipmi_user_t user,
1089
unsigned int channel,
1090
unsigned char *address)
1092
if (channel >= IPMI_MAX_CHANNELS)
1094
*address = user->intf->channels[channel].address;
1097
EXPORT_SYMBOL(ipmi_get_my_address);
1099
int ipmi_set_my_LUN(ipmi_user_t user,
1100
unsigned int channel,
1103
if (channel >= IPMI_MAX_CHANNELS)
1105
user->intf->channels[channel].lun = LUN & 0x3;
1108
EXPORT_SYMBOL(ipmi_set_my_LUN);
1110
int ipmi_get_my_LUN(ipmi_user_t user,
1111
unsigned int channel,
1112
unsigned char *address)
1114
if (channel >= IPMI_MAX_CHANNELS)
1116
*address = user->intf->channels[channel].lun;
1119
EXPORT_SYMBOL(ipmi_get_my_LUN);
1121
int ipmi_get_maintenance_mode(ipmi_user_t user)
1124
unsigned long flags;
1126
spin_lock_irqsave(&user->intf->maintenance_mode_lock, flags);
1127
mode = user->intf->maintenance_mode;
1128
spin_unlock_irqrestore(&user->intf->maintenance_mode_lock, flags);
1132
EXPORT_SYMBOL(ipmi_get_maintenance_mode);
1134
static void maintenance_mode_update(ipmi_smi_t intf)
1136
if (intf->handlers->set_maintenance_mode)
1137
intf->handlers->set_maintenance_mode(
1138
intf->send_info, intf->maintenance_mode_enable);
1141
int ipmi_set_maintenance_mode(ipmi_user_t user, int mode)
1144
unsigned long flags;
1145
ipmi_smi_t intf = user->intf;
1147
spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
1148
if (intf->maintenance_mode != mode) {
1150
case IPMI_MAINTENANCE_MODE_AUTO:
1151
intf->maintenance_mode = mode;
1152
intf->maintenance_mode_enable
1153
= (intf->auto_maintenance_timeout > 0);
1156
case IPMI_MAINTENANCE_MODE_OFF:
1157
intf->maintenance_mode = mode;
1158
intf->maintenance_mode_enable = 0;
1161
case IPMI_MAINTENANCE_MODE_ON:
1162
intf->maintenance_mode = mode;
1163
intf->maintenance_mode_enable = 1;
1171
maintenance_mode_update(intf);
1174
spin_unlock_irqrestore(&intf->maintenance_mode_lock, flags);
1178
EXPORT_SYMBOL(ipmi_set_maintenance_mode);
1180
int ipmi_set_gets_events(ipmi_user_t user, int val)
1182
unsigned long flags;
1183
ipmi_smi_t intf = user->intf;
1184
struct ipmi_recv_msg *msg, *msg2;
1185
struct list_head msgs;
1187
INIT_LIST_HEAD(&msgs);
1189
spin_lock_irqsave(&intf->events_lock, flags);
1190
user->gets_events = val;
1192
if (intf->delivering_events)
1194
* Another thread is delivering events for this, so
1195
* let it handle any new events.
1199
/* Deliver any queued events. */
1200
while (user->gets_events && !list_empty(&intf->waiting_events)) {
1201
list_for_each_entry_safe(msg, msg2, &intf->waiting_events, link)
1202
list_move_tail(&msg->link, &msgs);
1203
intf->waiting_events_count = 0;
1204
if (intf->event_msg_printed) {
1205
printk(KERN_WARNING PFX "Event queue no longer"
1207
intf->event_msg_printed = 0;
1210
intf->delivering_events = 1;
1211
spin_unlock_irqrestore(&intf->events_lock, flags);
1213
list_for_each_entry_safe(msg, msg2, &msgs, link) {
1215
kref_get(&user->refcount);
1216
deliver_response(msg);
1219
spin_lock_irqsave(&intf->events_lock, flags);
1220
intf->delivering_events = 0;
1224
spin_unlock_irqrestore(&intf->events_lock, flags);
1228
EXPORT_SYMBOL(ipmi_set_gets_events);
1230
static struct cmd_rcvr *find_cmd_rcvr(ipmi_smi_t intf,
1231
unsigned char netfn,
1235
struct cmd_rcvr *rcvr;
1237
list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
1238
if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)
1239
&& (rcvr->chans & (1 << chan)))
1245
static int is_cmd_rcvr_exclusive(ipmi_smi_t intf,
1246
unsigned char netfn,
1250
struct cmd_rcvr *rcvr;
1252
list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
1253
if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)
1254
&& (rcvr->chans & chans))
1260
int ipmi_register_for_cmd(ipmi_user_t user,
1261
unsigned char netfn,
1265
ipmi_smi_t intf = user->intf;
1266
struct cmd_rcvr *rcvr;
1270
rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL);
1274
rcvr->netfn = netfn;
1275
rcvr->chans = chans;
1278
mutex_lock(&intf->cmd_rcvrs_mutex);
1279
/* Make sure the command/netfn is not already registered. */
1280
if (!is_cmd_rcvr_exclusive(intf, netfn, cmd, chans)) {
1285
list_add_rcu(&rcvr->link, &intf->cmd_rcvrs);
1288
mutex_unlock(&intf->cmd_rcvrs_mutex);
1294
EXPORT_SYMBOL(ipmi_register_for_cmd);
1296
int ipmi_unregister_for_cmd(ipmi_user_t user,
1297
unsigned char netfn,
1301
ipmi_smi_t intf = user->intf;
1302
struct cmd_rcvr *rcvr;
1303
struct cmd_rcvr *rcvrs = NULL;
1304
int i, rv = -ENOENT;
1306
mutex_lock(&intf->cmd_rcvrs_mutex);
1307
for (i = 0; i < IPMI_NUM_CHANNELS; i++) {
1308
if (((1 << i) & chans) == 0)
1310
rcvr = find_cmd_rcvr(intf, netfn, cmd, i);
1313
if (rcvr->user == user) {
1315
rcvr->chans &= ~chans;
1316
if (rcvr->chans == 0) {
1317
list_del_rcu(&rcvr->link);
1323
mutex_unlock(&intf->cmd_rcvrs_mutex);
1332
EXPORT_SYMBOL(ipmi_unregister_for_cmd);
1334
static unsigned char
1335
ipmb_checksum(unsigned char *data, int size)
1337
unsigned char csum = 0;
1339
for (; size > 0; size--, data++)
1345
static inline void format_ipmb_msg(struct ipmi_smi_msg *smi_msg,
1346
struct kernel_ipmi_msg *msg,
1347
struct ipmi_ipmb_addr *ipmb_addr,
1349
unsigned char ipmb_seq,
1351
unsigned char source_address,
1352
unsigned char source_lun)
1356
/* Format the IPMB header data. */
1357
smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
1358
smi_msg->data[1] = IPMI_SEND_MSG_CMD;
1359
smi_msg->data[2] = ipmb_addr->channel;
1361
smi_msg->data[3] = 0;
1362
smi_msg->data[i+3] = ipmb_addr->slave_addr;
1363
smi_msg->data[i+4] = (msg->netfn << 2) | (ipmb_addr->lun & 0x3);
1364
smi_msg->data[i+5] = ipmb_checksum(&(smi_msg->data[i+3]), 2);
1365
smi_msg->data[i+6] = source_address;
1366
smi_msg->data[i+7] = (ipmb_seq << 2) | source_lun;
1367
smi_msg->data[i+8] = msg->cmd;
1369
/* Now tack on the data to the message. */
1370
if (msg->data_len > 0)
1371
memcpy(&(smi_msg->data[i+9]), msg->data,
1373
smi_msg->data_size = msg->data_len + 9;
1375
/* Now calculate the checksum and tack it on. */
1376
smi_msg->data[i+smi_msg->data_size]
1377
= ipmb_checksum(&(smi_msg->data[i+6]),
1378
smi_msg->data_size-6);
1381
* Add on the checksum size and the offset from the
1384
smi_msg->data_size += 1 + i;
1386
smi_msg->msgid = msgid;
1389
static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg,
1390
struct kernel_ipmi_msg *msg,
1391
struct ipmi_lan_addr *lan_addr,
1393
unsigned char ipmb_seq,
1394
unsigned char source_lun)
1396
/* Format the IPMB header data. */
1397
smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
1398
smi_msg->data[1] = IPMI_SEND_MSG_CMD;
1399
smi_msg->data[2] = lan_addr->channel;
1400
smi_msg->data[3] = lan_addr->session_handle;
1401
smi_msg->data[4] = lan_addr->remote_SWID;
1402
smi_msg->data[5] = (msg->netfn << 2) | (lan_addr->lun & 0x3);
1403
smi_msg->data[6] = ipmb_checksum(&(smi_msg->data[4]), 2);
1404
smi_msg->data[7] = lan_addr->local_SWID;
1405
smi_msg->data[8] = (ipmb_seq << 2) | source_lun;
1406
smi_msg->data[9] = msg->cmd;
1408
/* Now tack on the data to the message. */
1409
if (msg->data_len > 0)
1410
memcpy(&(smi_msg->data[10]), msg->data,
1412
smi_msg->data_size = msg->data_len + 10;
1414
/* Now calculate the checksum and tack it on. */
1415
smi_msg->data[smi_msg->data_size]
1416
= ipmb_checksum(&(smi_msg->data[7]),
1417
smi_msg->data_size-7);
1420
* Add on the checksum size and the offset from the
1423
smi_msg->data_size += 1;
1425
smi_msg->msgid = msgid;
1429
* Separate from ipmi_request so that the user does not have to be
1430
* supplied in certain circumstances (mainly at panic time). If
1431
* messages are supplied, they will be freed, even if an error
1434
static int i_ipmi_request(ipmi_user_t user,
1436
struct ipmi_addr *addr,
1438
struct kernel_ipmi_msg *msg,
1439
void *user_msg_data,
1441
struct ipmi_recv_msg *supplied_recv,
1443
unsigned char source_address,
1444
unsigned char source_lun,
1446
unsigned int retry_time_ms)
1449
struct ipmi_smi_msg *smi_msg;
1450
struct ipmi_recv_msg *recv_msg;
1451
unsigned long flags;
1452
struct ipmi_smi_handlers *handlers;
1456
recv_msg = supplied_recv;
1458
recv_msg = ipmi_alloc_recv_msg();
1459
if (recv_msg == NULL)
1462
recv_msg->user_msg_data = user_msg_data;
1465
smi_msg = (struct ipmi_smi_msg *) supplied_smi;
1467
smi_msg = ipmi_alloc_smi_msg();
1468
if (smi_msg == NULL) {
1469
ipmi_free_recv_msg(recv_msg);
1475
handlers = intf->handlers;
1481
recv_msg->user = user;
1483
kref_get(&user->refcount);
1484
recv_msg->msgid = msgid;
1486
* Store the message to send in the receive message so timeout
1487
* responses can get the proper response data.
1489
recv_msg->msg = *msg;
1491
if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
1492
struct ipmi_system_interface_addr *smi_addr;
1494
if (msg->netfn & 1) {
1495
/* Responses are not allowed to the SMI. */
1500
smi_addr = (struct ipmi_system_interface_addr *) addr;
1501
if (smi_addr->lun > 3) {
1502
ipmi_inc_stat(intf, sent_invalid_commands);
1507
memcpy(&recv_msg->addr, smi_addr, sizeof(*smi_addr));
1509
if ((msg->netfn == IPMI_NETFN_APP_REQUEST)
1510
&& ((msg->cmd == IPMI_SEND_MSG_CMD)
1511
|| (msg->cmd == IPMI_GET_MSG_CMD)
1512
|| (msg->cmd == IPMI_READ_EVENT_MSG_BUFFER_CMD))) {
1514
* We don't let the user do these, since we manage
1515
* the sequence numbers.
1517
ipmi_inc_stat(intf, sent_invalid_commands);
1522
if (((msg->netfn == IPMI_NETFN_APP_REQUEST)
1523
&& ((msg->cmd == IPMI_COLD_RESET_CMD)
1524
|| (msg->cmd == IPMI_WARM_RESET_CMD)))
1525
|| (msg->netfn == IPMI_NETFN_FIRMWARE_REQUEST)) {
1526
spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
1527
intf->auto_maintenance_timeout
1528
= IPMI_MAINTENANCE_MODE_TIMEOUT;
1529
if (!intf->maintenance_mode
1530
&& !intf->maintenance_mode_enable) {
1531
intf->maintenance_mode_enable = 1;
1532
maintenance_mode_update(intf);
1534
spin_unlock_irqrestore(&intf->maintenance_mode_lock,
1538
if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) {
1539
ipmi_inc_stat(intf, sent_invalid_commands);
1544
smi_msg->data[0] = (msg->netfn << 2) | (smi_addr->lun & 0x3);
1545
smi_msg->data[1] = msg->cmd;
1546
smi_msg->msgid = msgid;
1547
smi_msg->user_data = recv_msg;
1548
if (msg->data_len > 0)
1549
memcpy(&(smi_msg->data[2]), msg->data, msg->data_len);
1550
smi_msg->data_size = msg->data_len + 2;
1551
ipmi_inc_stat(intf, sent_local_commands);
1552
} else if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) {
1553
struct ipmi_ipmb_addr *ipmb_addr;
1554
unsigned char ipmb_seq;
1558
if (addr->channel >= IPMI_MAX_CHANNELS) {
1559
ipmi_inc_stat(intf, sent_invalid_commands);
1564
if (intf->channels[addr->channel].medium
1565
!= IPMI_CHANNEL_MEDIUM_IPMB) {
1566
ipmi_inc_stat(intf, sent_invalid_commands);
1572
if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)
1573
retries = 0; /* Don't retry broadcasts. */
1577
if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) {
1579
* Broadcasts add a zero at the beginning of the
1580
* message, but otherwise is the same as an IPMB
1583
addr->addr_type = IPMI_IPMB_ADDR_TYPE;
1588
/* Default to 1 second retries. */
1589
if (retry_time_ms == 0)
1590
retry_time_ms = 1000;
1593
* 9 for the header and 1 for the checksum, plus
1594
* possibly one for the broadcast.
1596
if ((msg->data_len + 10 + broadcast) > IPMI_MAX_MSG_LENGTH) {
1597
ipmi_inc_stat(intf, sent_invalid_commands);
1602
ipmb_addr = (struct ipmi_ipmb_addr *) addr;
1603
if (ipmb_addr->lun > 3) {
1604
ipmi_inc_stat(intf, sent_invalid_commands);
1609
memcpy(&recv_msg->addr, ipmb_addr, sizeof(*ipmb_addr));
1611
if (recv_msg->msg.netfn & 0x1) {
1613
* It's a response, so use the user's sequence
1616
ipmi_inc_stat(intf, sent_ipmb_responses);
1617
format_ipmb_msg(smi_msg, msg, ipmb_addr, msgid,
1619
source_address, source_lun);
1622
* Save the receive message so we can use it
1623
* to deliver the response.
1625
smi_msg->user_data = recv_msg;
1627
/* It's a command, so get a sequence for it. */
1629
spin_lock_irqsave(&(intf->seq_lock), flags);
1632
* Create a sequence number with a 1 second
1633
* timeout and 4 retries.
1635
rv = intf_next_seq(intf,
1644
* We have used up all the sequence numbers,
1645
* probably, so abort.
1647
spin_unlock_irqrestore(&(intf->seq_lock),
1652
ipmi_inc_stat(intf, sent_ipmb_commands);
1655
* Store the sequence number in the message,
1656
* so that when the send message response
1657
* comes back we can start the timer.
1659
format_ipmb_msg(smi_msg, msg, ipmb_addr,
1660
STORE_SEQ_IN_MSGID(ipmb_seq, seqid),
1661
ipmb_seq, broadcast,
1662
source_address, source_lun);
1665
* Copy the message into the recv message data, so we
1666
* can retransmit it later if necessary.
1668
memcpy(recv_msg->msg_data, smi_msg->data,
1669
smi_msg->data_size);
1670
recv_msg->msg.data = recv_msg->msg_data;
1671
recv_msg->msg.data_len = smi_msg->data_size;
1674
* We don't unlock until here, because we need
1675
* to copy the completed message into the
1676
* recv_msg before we release the lock.
1677
* Otherwise, race conditions may bite us. I
1678
* know that's pretty paranoid, but I prefer
1681
spin_unlock_irqrestore(&(intf->seq_lock), flags);
1683
} else if (is_lan_addr(addr)) {
1684
struct ipmi_lan_addr *lan_addr;
1685
unsigned char ipmb_seq;
1688
if (addr->channel >= IPMI_MAX_CHANNELS) {
1689
ipmi_inc_stat(intf, sent_invalid_commands);
1694
if ((intf->channels[addr->channel].medium
1695
!= IPMI_CHANNEL_MEDIUM_8023LAN)
1696
&& (intf->channels[addr->channel].medium
1697
!= IPMI_CHANNEL_MEDIUM_ASYNC)) {
1698
ipmi_inc_stat(intf, sent_invalid_commands);
1705
/* Default to 1 second retries. */
1706
if (retry_time_ms == 0)
1707
retry_time_ms = 1000;
1709
/* 11 for the header and 1 for the checksum. */
1710
if ((msg->data_len + 12) > IPMI_MAX_MSG_LENGTH) {
1711
ipmi_inc_stat(intf, sent_invalid_commands);
1716
lan_addr = (struct ipmi_lan_addr *) addr;
1717
if (lan_addr->lun > 3) {
1718
ipmi_inc_stat(intf, sent_invalid_commands);
1723
memcpy(&recv_msg->addr, lan_addr, sizeof(*lan_addr));
1725
if (recv_msg->msg.netfn & 0x1) {
1727
* It's a response, so use the user's sequence
1730
ipmi_inc_stat(intf, sent_lan_responses);
1731
format_lan_msg(smi_msg, msg, lan_addr, msgid,
1735
* Save the receive message so we can use it
1736
* to deliver the response.
1738
smi_msg->user_data = recv_msg;
1740
/* It's a command, so get a sequence for it. */
1742
spin_lock_irqsave(&(intf->seq_lock), flags);
1745
* Create a sequence number with a 1 second
1746
* timeout and 4 retries.
1748
rv = intf_next_seq(intf,
1757
* We have used up all the sequence numbers,
1758
* probably, so abort.
1760
spin_unlock_irqrestore(&(intf->seq_lock),
1765
ipmi_inc_stat(intf, sent_lan_commands);
1768
* Store the sequence number in the message,
1769
* so that when the send message response
1770
* comes back we can start the timer.
1772
format_lan_msg(smi_msg, msg, lan_addr,
1773
STORE_SEQ_IN_MSGID(ipmb_seq, seqid),
1774
ipmb_seq, source_lun);
1777
* Copy the message into the recv message data, so we
1778
* can retransmit it later if necessary.
1780
memcpy(recv_msg->msg_data, smi_msg->data,
1781
smi_msg->data_size);
1782
recv_msg->msg.data = recv_msg->msg_data;
1783
recv_msg->msg.data_len = smi_msg->data_size;
1786
* We don't unlock until here, because we need
1787
* to copy the completed message into the
1788
* recv_msg before we release the lock.
1789
* Otherwise, race conditions may bite us. I
1790
* know that's pretty paranoid, but I prefer
1793
spin_unlock_irqrestore(&(intf->seq_lock), flags);
1796
/* Unknown address type. */
1797
ipmi_inc_stat(intf, sent_invalid_commands);
1805
for (m = 0; m < smi_msg->data_size; m++)
1806
printk(" %2.2x", smi_msg->data[m]);
1811
handlers->sender(intf->send_info, smi_msg, priority);
1818
ipmi_free_smi_msg(smi_msg);
1819
ipmi_free_recv_msg(recv_msg);
1823
static int check_addr(ipmi_smi_t intf,
1824
struct ipmi_addr *addr,
1825
unsigned char *saddr,
1828
if (addr->channel >= IPMI_MAX_CHANNELS)
1830
*lun = intf->channels[addr->channel].lun;
1831
*saddr = intf->channels[addr->channel].address;
1835
int ipmi_request_settime(ipmi_user_t user,
1836
struct ipmi_addr *addr,
1838
struct kernel_ipmi_msg *msg,
1839
void *user_msg_data,
1842
unsigned int retry_time_ms)
1844
unsigned char saddr, lun;
1849
rv = check_addr(user->intf, addr, &saddr, &lun);
1852
return i_ipmi_request(user,
1865
EXPORT_SYMBOL(ipmi_request_settime);
1867
int ipmi_request_supply_msgs(ipmi_user_t user,
1868
struct ipmi_addr *addr,
1870
struct kernel_ipmi_msg *msg,
1871
void *user_msg_data,
1873
struct ipmi_recv_msg *supplied_recv,
1876
unsigned char saddr, lun;
1881
rv = check_addr(user->intf, addr, &saddr, &lun);
1884
return i_ipmi_request(user,
1897
EXPORT_SYMBOL(ipmi_request_supply_msgs);
1899
#ifdef CONFIG_PROC_FS
1900
static int smi_ipmb_proc_show(struct seq_file *m, void *v)
1902
ipmi_smi_t intf = m->private;
1905
seq_printf(m, "%x", intf->channels[0].address);
1906
for (i = 1; i < IPMI_MAX_CHANNELS; i++)
1907
seq_printf(m, " %x", intf->channels[i].address);
1908
return seq_putc(m, '\n');
1911
static int smi_ipmb_proc_open(struct inode *inode, struct file *file)
1913
return single_open(file, smi_ipmb_proc_show, PDE(inode)->data);
1916
static const struct file_operations smi_ipmb_proc_ops = {
1917
.open = smi_ipmb_proc_open,
1919
.llseek = seq_lseek,
1920
.release = single_release,
1923
static int smi_version_proc_show(struct seq_file *m, void *v)
1925
ipmi_smi_t intf = m->private;
1927
return seq_printf(m, "%u.%u\n",
1928
ipmi_version_major(&intf->bmc->id),
1929
ipmi_version_minor(&intf->bmc->id));
1932
static int smi_version_proc_open(struct inode *inode, struct file *file)
1934
return single_open(file, smi_version_proc_show, PDE(inode)->data);
1937
static const struct file_operations smi_version_proc_ops = {
1938
.open = smi_version_proc_open,
1940
.llseek = seq_lseek,
1941
.release = single_release,
1944
static int smi_stats_proc_show(struct seq_file *m, void *v)
1946
ipmi_smi_t intf = m->private;
1948
seq_printf(m, "sent_invalid_commands: %u\n",
1949
ipmi_get_stat(intf, sent_invalid_commands));
1950
seq_printf(m, "sent_local_commands: %u\n",
1951
ipmi_get_stat(intf, sent_local_commands));
1952
seq_printf(m, "handled_local_responses: %u\n",
1953
ipmi_get_stat(intf, handled_local_responses));
1954
seq_printf(m, "unhandled_local_responses: %u\n",
1955
ipmi_get_stat(intf, unhandled_local_responses));
1956
seq_printf(m, "sent_ipmb_commands: %u\n",
1957
ipmi_get_stat(intf, sent_ipmb_commands));
1958
seq_printf(m, "sent_ipmb_command_errs: %u\n",
1959
ipmi_get_stat(intf, sent_ipmb_command_errs));
1960
seq_printf(m, "retransmitted_ipmb_commands: %u\n",
1961
ipmi_get_stat(intf, retransmitted_ipmb_commands));
1962
seq_printf(m, "timed_out_ipmb_commands: %u\n",
1963
ipmi_get_stat(intf, timed_out_ipmb_commands));
1964
seq_printf(m, "timed_out_ipmb_broadcasts: %u\n",
1965
ipmi_get_stat(intf, timed_out_ipmb_broadcasts));
1966
seq_printf(m, "sent_ipmb_responses: %u\n",
1967
ipmi_get_stat(intf, sent_ipmb_responses));
1968
seq_printf(m, "handled_ipmb_responses: %u\n",
1969
ipmi_get_stat(intf, handled_ipmb_responses));
1970
seq_printf(m, "invalid_ipmb_responses: %u\n",
1971
ipmi_get_stat(intf, invalid_ipmb_responses));
1972
seq_printf(m, "unhandled_ipmb_responses: %u\n",
1973
ipmi_get_stat(intf, unhandled_ipmb_responses));
1974
seq_printf(m, "sent_lan_commands: %u\n",
1975
ipmi_get_stat(intf, sent_lan_commands));
1976
seq_printf(m, "sent_lan_command_errs: %u\n",
1977
ipmi_get_stat(intf, sent_lan_command_errs));
1978
seq_printf(m, "retransmitted_lan_commands: %u\n",
1979
ipmi_get_stat(intf, retransmitted_lan_commands));
1980
seq_printf(m, "timed_out_lan_commands: %u\n",
1981
ipmi_get_stat(intf, timed_out_lan_commands));
1982
seq_printf(m, "sent_lan_responses: %u\n",
1983
ipmi_get_stat(intf, sent_lan_responses));
1984
seq_printf(m, "handled_lan_responses: %u\n",
1985
ipmi_get_stat(intf, handled_lan_responses));
1986
seq_printf(m, "invalid_lan_responses: %u\n",
1987
ipmi_get_stat(intf, invalid_lan_responses));
1988
seq_printf(m, "unhandled_lan_responses: %u\n",
1989
ipmi_get_stat(intf, unhandled_lan_responses));
1990
seq_printf(m, "handled_commands: %u\n",
1991
ipmi_get_stat(intf, handled_commands));
1992
seq_printf(m, "invalid_commands: %u\n",
1993
ipmi_get_stat(intf, invalid_commands));
1994
seq_printf(m, "unhandled_commands: %u\n",
1995
ipmi_get_stat(intf, unhandled_commands));
1996
seq_printf(m, "invalid_events: %u\n",
1997
ipmi_get_stat(intf, invalid_events));
1998
seq_printf(m, "events: %u\n",
1999
ipmi_get_stat(intf, events));
2000
seq_printf(m, "failed rexmit LAN msgs: %u\n",
2001
ipmi_get_stat(intf, dropped_rexmit_lan_commands));
2002
seq_printf(m, "failed rexmit IPMB msgs: %u\n",
2003
ipmi_get_stat(intf, dropped_rexmit_ipmb_commands));
2007
static int smi_stats_proc_open(struct inode *inode, struct file *file)
2009
return single_open(file, smi_stats_proc_show, PDE(inode)->data);
2012
static const struct file_operations smi_stats_proc_ops = {
2013
.open = smi_stats_proc_open,
2015
.llseek = seq_lseek,
2016
.release = single_release,
2018
#endif /* CONFIG_PROC_FS */
2020
int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name,
2021
const struct file_operations *proc_ops,
2025
#ifdef CONFIG_PROC_FS
2026
struct proc_dir_entry *file;
2027
struct ipmi_proc_entry *entry;
2029
/* Create a list element. */
2030
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
2033
entry->name = kmalloc(strlen(name)+1, GFP_KERNEL);
2038
strcpy(entry->name, name);
2040
file = proc_create_data(name, 0, smi->proc_dir, proc_ops, data);
2046
mutex_lock(&smi->proc_entry_lock);
2047
/* Stick it on the list. */
2048
entry->next = smi->proc_entries;
2049
smi->proc_entries = entry;
2050
mutex_unlock(&smi->proc_entry_lock);
2052
#endif /* CONFIG_PROC_FS */
2056
EXPORT_SYMBOL(ipmi_smi_add_proc_entry);
2058
static int add_proc_entries(ipmi_smi_t smi, int num)
2062
#ifdef CONFIG_PROC_FS
2063
sprintf(smi->proc_dir_name, "%d", num);
2064
smi->proc_dir = proc_mkdir(smi->proc_dir_name, proc_ipmi_root);
2069
rv = ipmi_smi_add_proc_entry(smi, "stats",
2070
&smi_stats_proc_ops,
2074
rv = ipmi_smi_add_proc_entry(smi, "ipmb",
2079
rv = ipmi_smi_add_proc_entry(smi, "version",
2080
&smi_version_proc_ops,
2082
#endif /* CONFIG_PROC_FS */
2087
static void remove_proc_entries(ipmi_smi_t smi)
2089
#ifdef CONFIG_PROC_FS
2090
struct ipmi_proc_entry *entry;
2092
mutex_lock(&smi->proc_entry_lock);
2093
while (smi->proc_entries) {
2094
entry = smi->proc_entries;
2095
smi->proc_entries = entry->next;
2097
remove_proc_entry(entry->name, smi->proc_dir);
2101
mutex_unlock(&smi->proc_entry_lock);
2102
remove_proc_entry(smi->proc_dir_name, proc_ipmi_root);
2103
#endif /* CONFIG_PROC_FS */
2106
static int __find_bmc_guid(struct device *dev, void *data)
2108
unsigned char *id = data;
2109
struct bmc_device *bmc = dev_get_drvdata(dev);
2110
return memcmp(bmc->guid, id, 16) == 0;
2113
static struct bmc_device *ipmi_find_bmc_guid(struct device_driver *drv,
2114
unsigned char *guid)
2118
dev = driver_find_device(drv, NULL, guid, __find_bmc_guid);
2120
return dev_get_drvdata(dev);
2125
struct prod_dev_id {
2126
unsigned int product_id;
2127
unsigned char device_id;
2130
static int __find_bmc_prod_dev_id(struct device *dev, void *data)
2132
struct prod_dev_id *id = data;
2133
struct bmc_device *bmc = dev_get_drvdata(dev);
2135
return (bmc->id.product_id == id->product_id
2136
&& bmc->id.device_id == id->device_id);
2139
static struct bmc_device *ipmi_find_bmc_prod_dev_id(
2140
struct device_driver *drv,
2141
unsigned int product_id, unsigned char device_id)
2143
struct prod_dev_id id = {
2144
.product_id = product_id,
2145
.device_id = device_id,
2149
dev = driver_find_device(drv, NULL, &id, __find_bmc_prod_dev_id);
2151
return dev_get_drvdata(dev);
2156
static ssize_t device_id_show(struct device *dev,
2157
struct device_attribute *attr,
2160
struct bmc_device *bmc = dev_get_drvdata(dev);
2162
return snprintf(buf, 10, "%u\n", bmc->id.device_id);
2165
static ssize_t provides_dev_sdrs_show(struct device *dev,
2166
struct device_attribute *attr,
2169
struct bmc_device *bmc = dev_get_drvdata(dev);
2171
return snprintf(buf, 10, "%u\n",
2172
(bmc->id.device_revision & 0x80) >> 7);
2175
static ssize_t revision_show(struct device *dev, struct device_attribute *attr,
2178
struct bmc_device *bmc = dev_get_drvdata(dev);
2180
return snprintf(buf, 20, "%u\n",
2181
bmc->id.device_revision & 0x0F);
2184
static ssize_t firmware_rev_show(struct device *dev,
2185
struct device_attribute *attr,
2188
struct bmc_device *bmc = dev_get_drvdata(dev);
2190
return snprintf(buf, 20, "%u.%x\n", bmc->id.firmware_revision_1,
2191
bmc->id.firmware_revision_2);
2194
static ssize_t ipmi_version_show(struct device *dev,
2195
struct device_attribute *attr,
2198
struct bmc_device *bmc = dev_get_drvdata(dev);
2200
return snprintf(buf, 20, "%u.%u\n",
2201
ipmi_version_major(&bmc->id),
2202
ipmi_version_minor(&bmc->id));
2205
static ssize_t add_dev_support_show(struct device *dev,
2206
struct device_attribute *attr,
2209
struct bmc_device *bmc = dev_get_drvdata(dev);
2211
return snprintf(buf, 10, "0x%02x\n",
2212
bmc->id.additional_device_support);
2215
static ssize_t manufacturer_id_show(struct device *dev,
2216
struct device_attribute *attr,
2219
struct bmc_device *bmc = dev_get_drvdata(dev);
2221
return snprintf(buf, 20, "0x%6.6x\n", bmc->id.manufacturer_id);
2224
static ssize_t product_id_show(struct device *dev,
2225
struct device_attribute *attr,
2228
struct bmc_device *bmc = dev_get_drvdata(dev);
2230
return snprintf(buf, 10, "0x%4.4x\n", bmc->id.product_id);
2233
static ssize_t aux_firmware_rev_show(struct device *dev,
2234
struct device_attribute *attr,
2237
struct bmc_device *bmc = dev_get_drvdata(dev);
2239
return snprintf(buf, 21, "0x%02x 0x%02x 0x%02x 0x%02x\n",
2240
bmc->id.aux_firmware_revision[3],
2241
bmc->id.aux_firmware_revision[2],
2242
bmc->id.aux_firmware_revision[1],
2243
bmc->id.aux_firmware_revision[0]);
2246
static ssize_t guid_show(struct device *dev, struct device_attribute *attr,
2249
struct bmc_device *bmc = dev_get_drvdata(dev);
2251
return snprintf(buf, 100, "%Lx%Lx\n",
2252
(long long) bmc->guid[0],
2253
(long long) bmc->guid[8]);
2256
static void remove_files(struct bmc_device *bmc)
2261
device_remove_file(&bmc->dev->dev,
2262
&bmc->device_id_attr);
2263
device_remove_file(&bmc->dev->dev,
2264
&bmc->provides_dev_sdrs_attr);
2265
device_remove_file(&bmc->dev->dev,
2266
&bmc->revision_attr);
2267
device_remove_file(&bmc->dev->dev,
2268
&bmc->firmware_rev_attr);
2269
device_remove_file(&bmc->dev->dev,
2270
&bmc->version_attr);
2271
device_remove_file(&bmc->dev->dev,
2272
&bmc->add_dev_support_attr);
2273
device_remove_file(&bmc->dev->dev,
2274
&bmc->manufacturer_id_attr);
2275
device_remove_file(&bmc->dev->dev,
2276
&bmc->product_id_attr);
2278
if (bmc->id.aux_firmware_revision_set)
2279
device_remove_file(&bmc->dev->dev,
2280
&bmc->aux_firmware_rev_attr);
2282
device_remove_file(&bmc->dev->dev,
2287
cleanup_bmc_device(struct kref *ref)
2289
struct bmc_device *bmc;
2291
bmc = container_of(ref, struct bmc_device, refcount);
2294
platform_device_unregister(bmc->dev);
2298
static void ipmi_bmc_unregister(ipmi_smi_t intf)
2300
struct bmc_device *bmc = intf->bmc;
2302
if (intf->sysfs_name) {
2303
sysfs_remove_link(&intf->si_dev->kobj, intf->sysfs_name);
2304
kfree(intf->sysfs_name);
2305
intf->sysfs_name = NULL;
2307
if (intf->my_dev_name) {
2308
sysfs_remove_link(&bmc->dev->dev.kobj, intf->my_dev_name);
2309
kfree(intf->my_dev_name);
2310
intf->my_dev_name = NULL;
2313
mutex_lock(&ipmidriver_mutex);
2314
kref_put(&bmc->refcount, cleanup_bmc_device);
2316
mutex_unlock(&ipmidriver_mutex);
2319
static int create_files(struct bmc_device *bmc)
2323
bmc->device_id_attr.attr.name = "device_id";
2324
bmc->device_id_attr.attr.mode = S_IRUGO;
2325
bmc->device_id_attr.show = device_id_show;
2326
sysfs_attr_init(&bmc->device_id_attr.attr);
2328
bmc->provides_dev_sdrs_attr.attr.name = "provides_device_sdrs";
2329
bmc->provides_dev_sdrs_attr.attr.mode = S_IRUGO;
2330
bmc->provides_dev_sdrs_attr.show = provides_dev_sdrs_show;
2331
sysfs_attr_init(&bmc->provides_dev_sdrs_attr.attr);
2333
bmc->revision_attr.attr.name = "revision";
2334
bmc->revision_attr.attr.mode = S_IRUGO;
2335
bmc->revision_attr.show = revision_show;
2336
sysfs_attr_init(&bmc->revision_attr.attr);
2338
bmc->firmware_rev_attr.attr.name = "firmware_revision";
2339
bmc->firmware_rev_attr.attr.mode = S_IRUGO;
2340
bmc->firmware_rev_attr.show = firmware_rev_show;
2341
sysfs_attr_init(&bmc->firmware_rev_attr.attr);
2343
bmc->version_attr.attr.name = "ipmi_version";
2344
bmc->version_attr.attr.mode = S_IRUGO;
2345
bmc->version_attr.show = ipmi_version_show;
2346
sysfs_attr_init(&bmc->version_attr.attr);
2348
bmc->add_dev_support_attr.attr.name = "additional_device_support";
2349
bmc->add_dev_support_attr.attr.mode = S_IRUGO;
2350
bmc->add_dev_support_attr.show = add_dev_support_show;
2351
sysfs_attr_init(&bmc->add_dev_support_attr.attr);
2353
bmc->manufacturer_id_attr.attr.name = "manufacturer_id";
2354
bmc->manufacturer_id_attr.attr.mode = S_IRUGO;
2355
bmc->manufacturer_id_attr.show = manufacturer_id_show;
2356
sysfs_attr_init(&bmc->manufacturer_id_attr.attr);
2358
bmc->product_id_attr.attr.name = "product_id";
2359
bmc->product_id_attr.attr.mode = S_IRUGO;
2360
bmc->product_id_attr.show = product_id_show;
2361
sysfs_attr_init(&bmc->product_id_attr.attr);
2363
bmc->guid_attr.attr.name = "guid";
2364
bmc->guid_attr.attr.mode = S_IRUGO;
2365
bmc->guid_attr.show = guid_show;
2366
sysfs_attr_init(&bmc->guid_attr.attr);
2368
bmc->aux_firmware_rev_attr.attr.name = "aux_firmware_revision";
2369
bmc->aux_firmware_rev_attr.attr.mode = S_IRUGO;
2370
bmc->aux_firmware_rev_attr.show = aux_firmware_rev_show;
2371
sysfs_attr_init(&bmc->aux_firmware_rev_attr.attr);
2373
err = device_create_file(&bmc->dev->dev,
2374
&bmc->device_id_attr);
2377
err = device_create_file(&bmc->dev->dev,
2378
&bmc->provides_dev_sdrs_attr);
2381
err = device_create_file(&bmc->dev->dev,
2382
&bmc->revision_attr);
2385
err = device_create_file(&bmc->dev->dev,
2386
&bmc->firmware_rev_attr);
2389
err = device_create_file(&bmc->dev->dev,
2390
&bmc->version_attr);
2393
err = device_create_file(&bmc->dev->dev,
2394
&bmc->add_dev_support_attr);
2397
err = device_create_file(&bmc->dev->dev,
2398
&bmc->manufacturer_id_attr);
2401
err = device_create_file(&bmc->dev->dev,
2402
&bmc->product_id_attr);
2405
if (bmc->id.aux_firmware_revision_set) {
2406
err = device_create_file(&bmc->dev->dev,
2407
&bmc->aux_firmware_rev_attr);
2411
if (bmc->guid_set) {
2412
err = device_create_file(&bmc->dev->dev,
2421
if (bmc->id.aux_firmware_revision_set)
2422
device_remove_file(&bmc->dev->dev,
2423
&bmc->aux_firmware_rev_attr);
2425
device_remove_file(&bmc->dev->dev,
2426
&bmc->product_id_attr);
2428
device_remove_file(&bmc->dev->dev,
2429
&bmc->manufacturer_id_attr);
2431
device_remove_file(&bmc->dev->dev,
2432
&bmc->add_dev_support_attr);
2434
device_remove_file(&bmc->dev->dev,
2435
&bmc->version_attr);
2437
device_remove_file(&bmc->dev->dev,
2438
&bmc->firmware_rev_attr);
2440
device_remove_file(&bmc->dev->dev,
2441
&bmc->revision_attr);
2443
device_remove_file(&bmc->dev->dev,
2444
&bmc->provides_dev_sdrs_attr);
2446
device_remove_file(&bmc->dev->dev,
2447
&bmc->device_id_attr);
2452
static int ipmi_bmc_register(ipmi_smi_t intf, int ifnum,
2453
const char *sysfs_name)
2456
struct bmc_device *bmc = intf->bmc;
2457
struct bmc_device *old_bmc;
2461
mutex_lock(&ipmidriver_mutex);
2464
* Try to find if there is an bmc_device struct
2465
* representing the interfaced BMC already
2468
old_bmc = ipmi_find_bmc_guid(&ipmidriver.driver, bmc->guid);
2470
old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver.driver,
2475
* If there is already an bmc_device, free the new one,
2476
* otherwise register the new BMC device
2480
intf->bmc = old_bmc;
2483
kref_get(&bmc->refcount);
2484
mutex_unlock(&ipmidriver_mutex);
2487
"ipmi: interfacing existing BMC (man_id: 0x%6.6x,"
2488
" prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
2489
bmc->id.manufacturer_id,
2494
unsigned char orig_dev_id = bmc->id.device_id;
2495
int warn_printed = 0;
2497
snprintf(name, sizeof(name),
2498
"ipmi_bmc.%4.4x", bmc->id.product_id);
2500
while (ipmi_find_bmc_prod_dev_id(&ipmidriver.driver,
2502
bmc->id.device_id)) {
2503
if (!warn_printed) {
2504
printk(KERN_WARNING PFX
2505
"This machine has two different BMCs"
2506
" with the same product id and device"
2507
" id. This is an error in the"
2508
" firmware, but incrementing the"
2509
" device id to work around the problem."
2510
" Prod ID = 0x%x, Dev ID = 0x%x\n",
2511
bmc->id.product_id, bmc->id.device_id);
2514
bmc->id.device_id++; /* Wraps at 255 */
2515
if (bmc->id.device_id == orig_dev_id) {
2517
"Out of device ids!\n");
2522
bmc->dev = platform_device_alloc(name, bmc->id.device_id);
2524
mutex_unlock(&ipmidriver_mutex);
2527
" Unable to allocate platform device\n");
2530
bmc->dev->dev.driver = &ipmidriver.driver;
2531
dev_set_drvdata(&bmc->dev->dev, bmc);
2532
kref_init(&bmc->refcount);
2534
rv = platform_device_add(bmc->dev);
2535
mutex_unlock(&ipmidriver_mutex);
2537
platform_device_put(bmc->dev);
2541
" Unable to register bmc device: %d\n",
2544
* Don't go to out_err, you can only do that if
2545
* the device is registered already.
2550
rv = create_files(bmc);
2552
mutex_lock(&ipmidriver_mutex);
2553
platform_device_unregister(bmc->dev);
2554
mutex_unlock(&ipmidriver_mutex);
2559
dev_info(intf->si_dev, "Found new BMC (man_id: 0x%6.6x, "
2560
"prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
2561
bmc->id.manufacturer_id,
2567
* create symlink from system interface device to bmc device
2570
intf->sysfs_name = kstrdup(sysfs_name, GFP_KERNEL);
2571
if (!intf->sysfs_name) {
2574
"ipmi_msghandler: allocate link to BMC: %d\n",
2579
rv = sysfs_create_link(&intf->si_dev->kobj,
2580
&bmc->dev->dev.kobj, intf->sysfs_name);
2582
kfree(intf->sysfs_name);
2583
intf->sysfs_name = NULL;
2585
"ipmi_msghandler: Unable to create bmc symlink: %d\n",
2590
size = snprintf(dummy, 0, "ipmi%d", ifnum);
2591
intf->my_dev_name = kmalloc(size+1, GFP_KERNEL);
2592
if (!intf->my_dev_name) {
2593
kfree(intf->sysfs_name);
2594
intf->sysfs_name = NULL;
2597
"ipmi_msghandler: allocate link from BMC: %d\n",
2601
snprintf(intf->my_dev_name, size+1, "ipmi%d", ifnum);
2603
rv = sysfs_create_link(&bmc->dev->dev.kobj, &intf->si_dev->kobj,
2606
kfree(intf->sysfs_name);
2607
intf->sysfs_name = NULL;
2608
kfree(intf->my_dev_name);
2609
intf->my_dev_name = NULL;
2612
" Unable to create symlink to bmc: %d\n",
2620
ipmi_bmc_unregister(intf);
2625
send_guid_cmd(ipmi_smi_t intf, int chan)
2627
struct kernel_ipmi_msg msg;
2628
struct ipmi_system_interface_addr si;
2630
si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
2631
si.channel = IPMI_BMC_CHANNEL;
2634
msg.netfn = IPMI_NETFN_APP_REQUEST;
2635
msg.cmd = IPMI_GET_DEVICE_GUID_CMD;
2638
return i_ipmi_request(NULL,
2640
(struct ipmi_addr *) &si,
2647
intf->channels[0].address,
2648
intf->channels[0].lun,
2653
guid_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
2655
if ((msg->addr.addr_type != IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
2656
|| (msg->msg.netfn != IPMI_NETFN_APP_RESPONSE)
2657
|| (msg->msg.cmd != IPMI_GET_DEVICE_GUID_CMD))
2661
if (msg->msg.data[0] != 0) {
2662
/* Error from getting the GUID, the BMC doesn't have one. */
2663
intf->bmc->guid_set = 0;
2667
if (msg->msg.data_len < 17) {
2668
intf->bmc->guid_set = 0;
2669
printk(KERN_WARNING PFX
2670
"guid_handler: The GUID response from the BMC was too"
2671
" short, it was %d but should have been 17. Assuming"
2672
" GUID is not available.\n",
2677
memcpy(intf->bmc->guid, msg->msg.data, 16);
2678
intf->bmc->guid_set = 1;
2680
wake_up(&intf->waitq);
2684
get_guid(ipmi_smi_t intf)
2688
intf->bmc->guid_set = 0x2;
2689
intf->null_user_handler = guid_handler;
2690
rv = send_guid_cmd(intf, 0);
2692
/* Send failed, no GUID available. */
2693
intf->bmc->guid_set = 0;
2694
wait_event(intf->waitq, intf->bmc->guid_set != 2);
2695
intf->null_user_handler = NULL;
2699
send_channel_info_cmd(ipmi_smi_t intf, int chan)
2701
struct kernel_ipmi_msg msg;
2702
unsigned char data[1];
2703
struct ipmi_system_interface_addr si;
2705
si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
2706
si.channel = IPMI_BMC_CHANNEL;
2709
msg.netfn = IPMI_NETFN_APP_REQUEST;
2710
msg.cmd = IPMI_GET_CHANNEL_INFO_CMD;
2714
return i_ipmi_request(NULL,
2716
(struct ipmi_addr *) &si,
2723
intf->channels[0].address,
2724
intf->channels[0].lun,
2729
channel_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
2734
if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
2735
&& (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE)
2736
&& (msg->msg.cmd == IPMI_GET_CHANNEL_INFO_CMD)) {
2737
/* It's the one we want */
2738
if (msg->msg.data[0] != 0) {
2739
/* Got an error from the channel, just go on. */
2741
if (msg->msg.data[0] == IPMI_INVALID_COMMAND_ERR) {
2743
* If the MC does not support this
2744
* command, that is legal. We just
2745
* assume it has one IPMB at channel
2748
intf->channels[0].medium
2749
= IPMI_CHANNEL_MEDIUM_IPMB;
2750
intf->channels[0].protocol
2751
= IPMI_CHANNEL_PROTOCOL_IPMB;
2754
intf->curr_channel = IPMI_MAX_CHANNELS;
2755
wake_up(&intf->waitq);
2760
if (msg->msg.data_len < 4) {
2761
/* Message not big enough, just go on. */
2764
chan = intf->curr_channel;
2765
intf->channels[chan].medium = msg->msg.data[2] & 0x7f;
2766
intf->channels[chan].protocol = msg->msg.data[3] & 0x1f;
2769
intf->curr_channel++;
2770
if (intf->curr_channel >= IPMI_MAX_CHANNELS)
2771
wake_up(&intf->waitq);
2773
rv = send_channel_info_cmd(intf, intf->curr_channel);
2776
/* Got an error somehow, just give up. */
2777
intf->curr_channel = IPMI_MAX_CHANNELS;
2778
wake_up(&intf->waitq);
2780
printk(KERN_WARNING PFX
2781
"Error sending channel information: %d\n",
2789
void ipmi_poll_interface(ipmi_user_t user)
2791
ipmi_smi_t intf = user->intf;
2793
if (intf->handlers->poll)
2794
intf->handlers->poll(intf->send_info);
2796
EXPORT_SYMBOL(ipmi_poll_interface);
2798
int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
2800
struct ipmi_device_id *device_id,
2801
struct device *si_dev,
2802
const char *sysfs_name,
2803
unsigned char slave_addr)
2809
struct list_head *link;
2812
* Make sure the driver is actually initialized, this handles
2813
* problems with initialization order.
2816
rv = ipmi_init_msghandler();
2820
* The init code doesn't return an error if it was turned
2821
* off, but it won't initialize. Check that.
2827
intf = kzalloc(sizeof(*intf), GFP_KERNEL);
2831
intf->ipmi_version_major = ipmi_version_major(device_id);
2832
intf->ipmi_version_minor = ipmi_version_minor(device_id);
2834
intf->bmc = kzalloc(sizeof(*intf->bmc), GFP_KERNEL);
2839
intf->intf_num = -1; /* Mark it invalid for now. */
2840
kref_init(&intf->refcount);
2841
intf->bmc->id = *device_id;
2842
intf->si_dev = si_dev;
2843
for (j = 0; j < IPMI_MAX_CHANNELS; j++) {
2844
intf->channels[j].address = IPMI_BMC_SLAVE_ADDR;
2845
intf->channels[j].lun = 2;
2847
if (slave_addr != 0)
2848
intf->channels[0].address = slave_addr;
2849
INIT_LIST_HEAD(&intf->users);
2850
intf->handlers = handlers;
2851
intf->send_info = send_info;
2852
spin_lock_init(&intf->seq_lock);
2853
for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) {
2854
intf->seq_table[j].inuse = 0;
2855
intf->seq_table[j].seqid = 0;
2858
#ifdef CONFIG_PROC_FS
2859
mutex_init(&intf->proc_entry_lock);
2861
spin_lock_init(&intf->waiting_msgs_lock);
2862
INIT_LIST_HEAD(&intf->waiting_msgs);
2863
spin_lock_init(&intf->events_lock);
2864
INIT_LIST_HEAD(&intf->waiting_events);
2865
intf->waiting_events_count = 0;
2866
mutex_init(&intf->cmd_rcvrs_mutex);
2867
spin_lock_init(&intf->maintenance_mode_lock);
2868
INIT_LIST_HEAD(&intf->cmd_rcvrs);
2869
init_waitqueue_head(&intf->waitq);
2870
for (i = 0; i < IPMI_NUM_STATS; i++)
2871
atomic_set(&intf->stats[i], 0);
2873
intf->proc_dir = NULL;
2875
mutex_lock(&smi_watchers_mutex);
2876
mutex_lock(&ipmi_interfaces_mutex);
2877
/* Look for a hole in the numbers. */
2879
link = &ipmi_interfaces;
2880
list_for_each_entry_rcu(tintf, &ipmi_interfaces, link) {
2881
if (tintf->intf_num != i) {
2882
link = &tintf->link;
2887
/* Add the new interface in numeric order. */
2889
list_add_rcu(&intf->link, &ipmi_interfaces);
2891
list_add_tail_rcu(&intf->link, link);
2893
rv = handlers->start_processing(send_info, intf);
2899
if ((intf->ipmi_version_major > 1)
2900
|| ((intf->ipmi_version_major == 1)
2901
&& (intf->ipmi_version_minor >= 5))) {
2903
* Start scanning the channels to see what is
2906
intf->null_user_handler = channel_handler;
2907
intf->curr_channel = 0;
2908
rv = send_channel_info_cmd(intf, 0);
2912
/* Wait for the channel info to be read. */
2913
wait_event(intf->waitq,
2914
intf->curr_channel >= IPMI_MAX_CHANNELS);
2915
intf->null_user_handler = NULL;
2917
/* Assume a single IPMB channel at zero. */
2918
intf->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB;
2919
intf->channels[0].protocol = IPMI_CHANNEL_PROTOCOL_IPMB;
2920
intf->curr_channel = IPMI_MAX_CHANNELS;
2924
rv = add_proc_entries(intf, i);
2926
rv = ipmi_bmc_register(intf, i, sysfs_name);
2931
remove_proc_entries(intf);
2932
intf->handlers = NULL;
2933
list_del_rcu(&intf->link);
2934
mutex_unlock(&ipmi_interfaces_mutex);
2935
mutex_unlock(&smi_watchers_mutex);
2937
kref_put(&intf->refcount, intf_free);
2940
* Keep memory order straight for RCU readers. Make
2941
* sure everything else is committed to memory before
2942
* setting intf_num to mark the interface valid.
2946
mutex_unlock(&ipmi_interfaces_mutex);
2947
/* After this point the interface is legal to use. */
2948
call_smi_watchers(i, intf->si_dev);
2949
mutex_unlock(&smi_watchers_mutex);
2954
EXPORT_SYMBOL(ipmi_register_smi);
2956
static void cleanup_smi_msgs(ipmi_smi_t intf)
2959
struct seq_table *ent;
2961
/* No need for locks, the interface is down. */
2962
for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
2963
ent = &(intf->seq_table[i]);
2966
deliver_err_response(ent->recv_msg, IPMI_ERR_UNSPECIFIED);
2970
int ipmi_unregister_smi(ipmi_smi_t intf)
2972
struct ipmi_smi_watcher *w;
2973
int intf_num = intf->intf_num;
2975
ipmi_bmc_unregister(intf);
2977
mutex_lock(&smi_watchers_mutex);
2978
mutex_lock(&ipmi_interfaces_mutex);
2979
intf->intf_num = -1;
2980
intf->handlers = NULL;
2981
list_del_rcu(&intf->link);
2982
mutex_unlock(&ipmi_interfaces_mutex);
2985
cleanup_smi_msgs(intf);
2987
remove_proc_entries(intf);
2990
* Call all the watcher interfaces to tell them that
2991
* an interface is gone.
2993
list_for_each_entry(w, &smi_watchers, link)
2994
w->smi_gone(intf_num);
2995
mutex_unlock(&smi_watchers_mutex);
2997
kref_put(&intf->refcount, intf_free);
3000
EXPORT_SYMBOL(ipmi_unregister_smi);
3002
static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf,
3003
struct ipmi_smi_msg *msg)
3005
struct ipmi_ipmb_addr ipmb_addr;
3006
struct ipmi_recv_msg *recv_msg;
3009
* This is 11, not 10, because the response must contain a
3012
if (msg->rsp_size < 11) {
3013
/* Message not big enough, just ignore it. */
3014
ipmi_inc_stat(intf, invalid_ipmb_responses);
3018
if (msg->rsp[2] != 0) {
3019
/* An error getting the response, just ignore it. */
3023
ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE;
3024
ipmb_addr.slave_addr = msg->rsp[6];
3025
ipmb_addr.channel = msg->rsp[3] & 0x0f;
3026
ipmb_addr.lun = msg->rsp[7] & 3;
3029
* It's a response from a remote entity. Look up the sequence
3030
* number and handle the response.
3032
if (intf_find_seq(intf,
3036
(msg->rsp[4] >> 2) & (~1),
3037
(struct ipmi_addr *) &(ipmb_addr),
3040
* We were unable to find the sequence number,
3041
* so just nuke the message.
3043
ipmi_inc_stat(intf, unhandled_ipmb_responses);
3047
memcpy(recv_msg->msg_data,
3051
* The other fields matched, so no need to set them, except
3052
* for netfn, which needs to be the response that was
3053
* returned, not the request value.
3055
recv_msg->msg.netfn = msg->rsp[4] >> 2;
3056
recv_msg->msg.data = recv_msg->msg_data;
3057
recv_msg->msg.data_len = msg->rsp_size - 10;
3058
recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
3059
ipmi_inc_stat(intf, handled_ipmb_responses);
3060
deliver_response(recv_msg);
3065
static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf,
3066
struct ipmi_smi_msg *msg)
3068
struct cmd_rcvr *rcvr;
3070
unsigned char netfn;
3073
ipmi_user_t user = NULL;
3074
struct ipmi_ipmb_addr *ipmb_addr;
3075
struct ipmi_recv_msg *recv_msg;
3076
struct ipmi_smi_handlers *handlers;
3078
if (msg->rsp_size < 10) {
3079
/* Message not big enough, just ignore it. */
3080
ipmi_inc_stat(intf, invalid_commands);
3084
if (msg->rsp[2] != 0) {
3085
/* An error getting the response, just ignore it. */
3089
netfn = msg->rsp[4] >> 2;
3091
chan = msg->rsp[3] & 0xf;
3094
rcvr = find_cmd_rcvr(intf, netfn, cmd, chan);
3097
kref_get(&user->refcount);
3103
/* We didn't find a user, deliver an error response. */
3104
ipmi_inc_stat(intf, unhandled_commands);
3106
msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
3107
msg->data[1] = IPMI_SEND_MSG_CMD;
3108
msg->data[2] = msg->rsp[3];
3109
msg->data[3] = msg->rsp[6];
3110
msg->data[4] = ((netfn + 1) << 2) | (msg->rsp[7] & 0x3);
3111
msg->data[5] = ipmb_checksum(&(msg->data[3]), 2);
3112
msg->data[6] = intf->channels[msg->rsp[3] & 0xf].address;
3114
msg->data[7] = (msg->rsp[7] & 0xfc) | (msg->rsp[4] & 0x3);
3115
msg->data[8] = msg->rsp[8]; /* cmd */
3116
msg->data[9] = IPMI_INVALID_CMD_COMPLETION_CODE;
3117
msg->data[10] = ipmb_checksum(&(msg->data[6]), 4);
3118
msg->data_size = 11;
3123
printk("Invalid command:");
3124
for (m = 0; m < msg->data_size; m++)
3125
printk(" %2.2x", msg->data[m]);
3130
handlers = intf->handlers;
3132
handlers->sender(intf->send_info, msg, 0);
3134
* We used the message, so return the value
3135
* that causes it to not be freed or
3142
/* Deliver the message to the user. */
3143
ipmi_inc_stat(intf, handled_commands);
3145
recv_msg = ipmi_alloc_recv_msg();
3148
* We couldn't allocate memory for the
3149
* message, so requeue it for handling
3153
kref_put(&user->refcount, free_user);
3155
/* Extract the source address from the data. */
3156
ipmb_addr = (struct ipmi_ipmb_addr *) &recv_msg->addr;
3157
ipmb_addr->addr_type = IPMI_IPMB_ADDR_TYPE;
3158
ipmb_addr->slave_addr = msg->rsp[6];
3159
ipmb_addr->lun = msg->rsp[7] & 3;
3160
ipmb_addr->channel = msg->rsp[3] & 0xf;
3163
* Extract the rest of the message information
3164
* from the IPMB header.
3166
recv_msg->user = user;
3167
recv_msg->recv_type = IPMI_CMD_RECV_TYPE;
3168
recv_msg->msgid = msg->rsp[7] >> 2;
3169
recv_msg->msg.netfn = msg->rsp[4] >> 2;
3170
recv_msg->msg.cmd = msg->rsp[8];
3171
recv_msg->msg.data = recv_msg->msg_data;
3174
* We chop off 10, not 9 bytes because the checksum
3175
* at the end also needs to be removed.
3177
recv_msg->msg.data_len = msg->rsp_size - 10;
3178
memcpy(recv_msg->msg_data,
3180
msg->rsp_size - 10);
3181
deliver_response(recv_msg);
3188
static int handle_lan_get_msg_rsp(ipmi_smi_t intf,
3189
struct ipmi_smi_msg *msg)
3191
struct ipmi_lan_addr lan_addr;
3192
struct ipmi_recv_msg *recv_msg;
3196
* This is 13, not 12, because the response must contain a
3199
if (msg->rsp_size < 13) {
3200
/* Message not big enough, just ignore it. */
3201
ipmi_inc_stat(intf, invalid_lan_responses);
3205
if (msg->rsp[2] != 0) {
3206
/* An error getting the response, just ignore it. */
3210
lan_addr.addr_type = IPMI_LAN_ADDR_TYPE;
3211
lan_addr.session_handle = msg->rsp[4];
3212
lan_addr.remote_SWID = msg->rsp[8];
3213
lan_addr.local_SWID = msg->rsp[5];
3214
lan_addr.channel = msg->rsp[3] & 0x0f;
3215
lan_addr.privilege = msg->rsp[3] >> 4;
3216
lan_addr.lun = msg->rsp[9] & 3;
3219
* It's a response from a remote entity. Look up the sequence
3220
* number and handle the response.
3222
if (intf_find_seq(intf,
3226
(msg->rsp[6] >> 2) & (~1),
3227
(struct ipmi_addr *) &(lan_addr),
3230
* We were unable to find the sequence number,
3231
* so just nuke the message.
3233
ipmi_inc_stat(intf, unhandled_lan_responses);
3237
memcpy(recv_msg->msg_data,
3239
msg->rsp_size - 11);
3241
* The other fields matched, so no need to set them, except
3242
* for netfn, which needs to be the response that was
3243
* returned, not the request value.
3245
recv_msg->msg.netfn = msg->rsp[6] >> 2;
3246
recv_msg->msg.data = recv_msg->msg_data;
3247
recv_msg->msg.data_len = msg->rsp_size - 12;
3248
recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
3249
ipmi_inc_stat(intf, handled_lan_responses);
3250
deliver_response(recv_msg);
3255
static int handle_lan_get_msg_cmd(ipmi_smi_t intf,
3256
struct ipmi_smi_msg *msg)
3258
struct cmd_rcvr *rcvr;
3260
unsigned char netfn;
3263
ipmi_user_t user = NULL;
3264
struct ipmi_lan_addr *lan_addr;
3265
struct ipmi_recv_msg *recv_msg;
3267
if (msg->rsp_size < 12) {
3268
/* Message not big enough, just ignore it. */
3269
ipmi_inc_stat(intf, invalid_commands);
3273
if (msg->rsp[2] != 0) {
3274
/* An error getting the response, just ignore it. */
3278
netfn = msg->rsp[6] >> 2;
3280
chan = msg->rsp[3] & 0xf;
3283
rcvr = find_cmd_rcvr(intf, netfn, cmd, chan);
3286
kref_get(&user->refcount);
3292
/* We didn't find a user, just give up. */
3293
ipmi_inc_stat(intf, unhandled_commands);
3296
* Don't do anything with these messages, just allow
3301
/* Deliver the message to the user. */
3302
ipmi_inc_stat(intf, handled_commands);
3304
recv_msg = ipmi_alloc_recv_msg();
3307
* We couldn't allocate memory for the
3308
* message, so requeue it for handling later.
3311
kref_put(&user->refcount, free_user);
3313
/* Extract the source address from the data. */
3314
lan_addr = (struct ipmi_lan_addr *) &recv_msg->addr;
3315
lan_addr->addr_type = IPMI_LAN_ADDR_TYPE;
3316
lan_addr->session_handle = msg->rsp[4];
3317
lan_addr->remote_SWID = msg->rsp[8];
3318
lan_addr->local_SWID = msg->rsp[5];
3319
lan_addr->lun = msg->rsp[9] & 3;
3320
lan_addr->channel = msg->rsp[3] & 0xf;
3321
lan_addr->privilege = msg->rsp[3] >> 4;
3324
* Extract the rest of the message information
3325
* from the IPMB header.
3327
recv_msg->user = user;
3328
recv_msg->recv_type = IPMI_CMD_RECV_TYPE;
3329
recv_msg->msgid = msg->rsp[9] >> 2;
3330
recv_msg->msg.netfn = msg->rsp[6] >> 2;
3331
recv_msg->msg.cmd = msg->rsp[10];
3332
recv_msg->msg.data = recv_msg->msg_data;
3335
* We chop off 12, not 11 bytes because the checksum
3336
* at the end also needs to be removed.
3338
recv_msg->msg.data_len = msg->rsp_size - 12;
3339
memcpy(recv_msg->msg_data,
3341
msg->rsp_size - 12);
3342
deliver_response(recv_msg);
3350
* This routine will handle "Get Message" command responses with
3351
* channels that use an OEM Medium. The message format belongs to
3352
* the OEM. See IPMI 2.0 specification, Chapter 6 and
3353
* Chapter 22, sections 22.6 and 22.24 for more details.
3355
static int handle_oem_get_msg_cmd(ipmi_smi_t intf,
3356
struct ipmi_smi_msg *msg)
3358
struct cmd_rcvr *rcvr;
3360
unsigned char netfn;
3363
ipmi_user_t user = NULL;
3364
struct ipmi_system_interface_addr *smi_addr;
3365
struct ipmi_recv_msg *recv_msg;
3368
* We expect the OEM SW to perform error checking
3369
* so we just do some basic sanity checks
3371
if (msg->rsp_size < 4) {
3372
/* Message not big enough, just ignore it. */
3373
ipmi_inc_stat(intf, invalid_commands);
3377
if (msg->rsp[2] != 0) {
3378
/* An error getting the response, just ignore it. */
3383
* This is an OEM Message so the OEM needs to know how
3384
* handle the message. We do no interpretation.
3386
netfn = msg->rsp[0] >> 2;
3388
chan = msg->rsp[3] & 0xf;
3391
rcvr = find_cmd_rcvr(intf, netfn, cmd, chan);
3394
kref_get(&user->refcount);
3400
/* We didn't find a user, just give up. */
3401
ipmi_inc_stat(intf, unhandled_commands);
3404
* Don't do anything with these messages, just allow
3410
/* Deliver the message to the user. */
3411
ipmi_inc_stat(intf, handled_commands);
3413
recv_msg = ipmi_alloc_recv_msg();
3416
* We couldn't allocate memory for the
3417
* message, so requeue it for handling
3421
kref_put(&user->refcount, free_user);
3424
* OEM Messages are expected to be delivered via
3425
* the system interface to SMS software. We might
3426
* need to visit this again depending on OEM
3429
smi_addr = ((struct ipmi_system_interface_addr *)
3431
smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
3432
smi_addr->channel = IPMI_BMC_CHANNEL;
3433
smi_addr->lun = msg->rsp[0] & 3;
3435
recv_msg->user = user;
3436
recv_msg->user_msg_data = NULL;
3437
recv_msg->recv_type = IPMI_OEM_RECV_TYPE;
3438
recv_msg->msg.netfn = msg->rsp[0] >> 2;
3439
recv_msg->msg.cmd = msg->rsp[1];
3440
recv_msg->msg.data = recv_msg->msg_data;
3443
* The message starts at byte 4 which follows the
3444
* the Channel Byte in the "GET MESSAGE" command
3446
recv_msg->msg.data_len = msg->rsp_size - 4;
3447
memcpy(recv_msg->msg_data,
3450
deliver_response(recv_msg);
3457
static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg,
3458
struct ipmi_smi_msg *msg)
3460
struct ipmi_system_interface_addr *smi_addr;
3462
recv_msg->msgid = 0;
3463
smi_addr = (struct ipmi_system_interface_addr *) &(recv_msg->addr);
3464
smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
3465
smi_addr->channel = IPMI_BMC_CHANNEL;
3466
smi_addr->lun = msg->rsp[0] & 3;
3467
recv_msg->recv_type = IPMI_ASYNC_EVENT_RECV_TYPE;
3468
recv_msg->msg.netfn = msg->rsp[0] >> 2;
3469
recv_msg->msg.cmd = msg->rsp[1];
3470
memcpy(recv_msg->msg_data, &(msg->rsp[3]), msg->rsp_size - 3);
3471
recv_msg->msg.data = recv_msg->msg_data;
3472
recv_msg->msg.data_len = msg->rsp_size - 3;
3475
static int handle_read_event_rsp(ipmi_smi_t intf,
3476
struct ipmi_smi_msg *msg)
3478
struct ipmi_recv_msg *recv_msg, *recv_msg2;
3479
struct list_head msgs;
3482
int deliver_count = 0;
3483
unsigned long flags;
3485
if (msg->rsp_size < 19) {
3486
/* Message is too small to be an IPMB event. */
3487
ipmi_inc_stat(intf, invalid_events);
3491
if (msg->rsp[2] != 0) {
3492
/* An error getting the event, just ignore it. */
3496
INIT_LIST_HEAD(&msgs);
3498
spin_lock_irqsave(&intf->events_lock, flags);
3500
ipmi_inc_stat(intf, events);
3503
* Allocate and fill in one message for every user that is
3507
list_for_each_entry_rcu(user, &intf->users, link) {
3508
if (!user->gets_events)
3511
recv_msg = ipmi_alloc_recv_msg();
3514
list_for_each_entry_safe(recv_msg, recv_msg2, &msgs,
3516
list_del(&recv_msg->link);
3517
ipmi_free_recv_msg(recv_msg);
3520
* We couldn't allocate memory for the
3521
* message, so requeue it for handling
3530
copy_event_into_recv_msg(recv_msg, msg);
3531
recv_msg->user = user;
3532
kref_get(&user->refcount);
3533
list_add_tail(&(recv_msg->link), &msgs);
3537
if (deliver_count) {
3538
/* Now deliver all the messages. */
3539
list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) {
3540
list_del(&recv_msg->link);
3541
deliver_response(recv_msg);
3543
} else if (intf->waiting_events_count < MAX_EVENTS_IN_QUEUE) {
3545
* No one to receive the message, put it in queue if there's
3546
* not already too many things in the queue.
3548
recv_msg = ipmi_alloc_recv_msg();
3551
* We couldn't allocate memory for the
3552
* message, so requeue it for handling
3559
copy_event_into_recv_msg(recv_msg, msg);
3560
list_add_tail(&(recv_msg->link), &(intf->waiting_events));
3561
intf->waiting_events_count++;
3562
} else if (!intf->event_msg_printed) {
3564
* There's too many things in the queue, discard this
3567
printk(KERN_WARNING PFX "Event queue full, discarding"
3568
" incoming events\n");
3569
intf->event_msg_printed = 1;
3573
spin_unlock_irqrestore(&(intf->events_lock), flags);
3578
static int handle_bmc_rsp(ipmi_smi_t intf,
3579
struct ipmi_smi_msg *msg)
3581
struct ipmi_recv_msg *recv_msg;
3582
struct ipmi_user *user;
3584
recv_msg = (struct ipmi_recv_msg *) msg->user_data;
3585
if (recv_msg == NULL) {
3587
"IPMI message received with no owner. This\n"
3588
"could be because of a malformed message, or\n"
3589
"because of a hardware error. Contact your\n"
3590
"hardware vender for assistance\n");
3594
user = recv_msg->user;
3595
/* Make sure the user still exists. */
3596
if (user && !user->valid) {
3597
/* The user for the message went away, so give up. */
3598
ipmi_inc_stat(intf, unhandled_local_responses);
3599
ipmi_free_recv_msg(recv_msg);
3601
struct ipmi_system_interface_addr *smi_addr;
3603
ipmi_inc_stat(intf, handled_local_responses);
3604
recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
3605
recv_msg->msgid = msg->msgid;
3606
smi_addr = ((struct ipmi_system_interface_addr *)
3608
smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
3609
smi_addr->channel = IPMI_BMC_CHANNEL;
3610
smi_addr->lun = msg->rsp[0] & 3;
3611
recv_msg->msg.netfn = msg->rsp[0] >> 2;
3612
recv_msg->msg.cmd = msg->rsp[1];
3613
memcpy(recv_msg->msg_data,
3616
recv_msg->msg.data = recv_msg->msg_data;
3617
recv_msg->msg.data_len = msg->rsp_size - 2;
3618
deliver_response(recv_msg);
3625
* Handle a new message. Return 1 if the message should be requeued,
3626
* 0 if the message should be freed, or -1 if the message should not
3627
* be freed or requeued.
3629
static int handle_new_recv_msg(ipmi_smi_t intf,
3630
struct ipmi_smi_msg *msg)
3638
for (m = 0; m < msg->rsp_size; m++)
3639
printk(" %2.2x", msg->rsp[m]);
3642
if (msg->rsp_size < 2) {
3643
/* Message is too small to be correct. */
3644
printk(KERN_WARNING PFX "BMC returned to small a message"
3645
" for netfn %x cmd %x, got %d bytes\n",
3646
(msg->data[0] >> 2) | 1, msg->data[1], msg->rsp_size);
3648
/* Generate an error response for the message. */
3649
msg->rsp[0] = msg->data[0] | (1 << 2);
3650
msg->rsp[1] = msg->data[1];
3651
msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
3653
} else if (((msg->rsp[0] >> 2) != ((msg->data[0] >> 2) | 1))
3654
|| (msg->rsp[1] != msg->data[1])) {
3656
* The NetFN and Command in the response is not even
3657
* marginally correct.
3659
printk(KERN_WARNING PFX "BMC returned incorrect response,"
3660
" expected netfn %x cmd %x, got netfn %x cmd %x\n",
3661
(msg->data[0] >> 2) | 1, msg->data[1],
3662
msg->rsp[0] >> 2, msg->rsp[1]);
3664
/* Generate an error response for the message. */
3665
msg->rsp[0] = msg->data[0] | (1 << 2);
3666
msg->rsp[1] = msg->data[1];
3667
msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
3671
if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
3672
&& (msg->rsp[1] == IPMI_SEND_MSG_CMD)
3673
&& (msg->user_data != NULL)) {
3675
* It's a response to a response we sent. For this we
3676
* deliver a send message response to the user.
3678
struct ipmi_recv_msg *recv_msg = msg->user_data;
3681
if (msg->rsp_size < 2)
3682
/* Message is too small to be correct. */
3685
chan = msg->data[2] & 0x0f;
3686
if (chan >= IPMI_MAX_CHANNELS)
3687
/* Invalid channel number */
3693
/* Make sure the user still exists. */
3694
if (!recv_msg->user || !recv_msg->user->valid)
3697
recv_msg->recv_type = IPMI_RESPONSE_RESPONSE_TYPE;
3698
recv_msg->msg.data = recv_msg->msg_data;
3699
recv_msg->msg.data_len = 1;
3700
recv_msg->msg_data[0] = msg->rsp[2];
3701
deliver_response(recv_msg);
3702
} else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
3703
&& (msg->rsp[1] == IPMI_GET_MSG_CMD)) {
3704
/* It's from the receive queue. */
3705
chan = msg->rsp[3] & 0xf;
3706
if (chan >= IPMI_MAX_CHANNELS) {
3707
/* Invalid channel number */
3713
* We need to make sure the channels have been initialized.
3714
* The channel_handler routine will set the "curr_channel"
3715
* equal to or greater than IPMI_MAX_CHANNELS when all the
3716
* channels for this interface have been initialized.
3718
if (intf->curr_channel < IPMI_MAX_CHANNELS) {
3719
requeue = 0; /* Throw the message away */
3723
switch (intf->channels[chan].medium) {
3724
case IPMI_CHANNEL_MEDIUM_IPMB:
3725
if (msg->rsp[4] & 0x04) {
3727
* It's a response, so find the
3728
* requesting message and send it up.
3730
requeue = handle_ipmb_get_msg_rsp(intf, msg);
3733
* It's a command to the SMS from some other
3734
* entity. Handle that.
3736
requeue = handle_ipmb_get_msg_cmd(intf, msg);
3740
case IPMI_CHANNEL_MEDIUM_8023LAN:
3741
case IPMI_CHANNEL_MEDIUM_ASYNC:
3742
if (msg->rsp[6] & 0x04) {
3744
* It's a response, so find the
3745
* requesting message and send it up.
3747
requeue = handle_lan_get_msg_rsp(intf, msg);
3750
* It's a command to the SMS from some other
3751
* entity. Handle that.
3753
requeue = handle_lan_get_msg_cmd(intf, msg);
3758
/* Check for OEM Channels. Clients had better
3759
register for these commands. */
3760
if ((intf->channels[chan].medium
3761
>= IPMI_CHANNEL_MEDIUM_OEM_MIN)
3762
&& (intf->channels[chan].medium
3763
<= IPMI_CHANNEL_MEDIUM_OEM_MAX)) {
3764
requeue = handle_oem_get_msg_cmd(intf, msg);
3767
* We don't handle the channel type, so just
3774
} else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
3775
&& (msg->rsp[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD)) {
3776
/* It's an asyncronous event. */
3777
requeue = handle_read_event_rsp(intf, msg);
3779
/* It's a response from the local BMC. */
3780
requeue = handle_bmc_rsp(intf, msg);
3787
/* Handle a new message from the lower layer. */
3788
void ipmi_smi_msg_received(ipmi_smi_t intf,
3789
struct ipmi_smi_msg *msg)
3791
unsigned long flags = 0; /* keep us warning-free. */
3793
int run_to_completion;
3796
if ((msg->data_size >= 2)
3797
&& (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2))
3798
&& (msg->data[1] == IPMI_SEND_MSG_CMD)
3799
&& (msg->user_data == NULL)) {
3801
* This is the local response to a command send, start
3802
* the timer for these. The user_data will not be
3803
* NULL if this is a response send, and we will let
3804
* response sends just go through.
3808
* Check for errors, if we get certain errors (ones
3809
* that mean basically we can try again later), we
3810
* ignore them and start the timer. Otherwise we
3811
* report the error immediately.
3813
if ((msg->rsp_size >= 3) && (msg->rsp[2] != 0)
3814
&& (msg->rsp[2] != IPMI_NODE_BUSY_ERR)
3815
&& (msg->rsp[2] != IPMI_LOST_ARBITRATION_ERR)
3816
&& (msg->rsp[2] != IPMI_BUS_ERR)
3817
&& (msg->rsp[2] != IPMI_NAK_ON_WRITE_ERR)) {
3818
int chan = msg->rsp[3] & 0xf;
3820
/* Got an error sending the message, handle it. */
3821
if (chan >= IPMI_MAX_CHANNELS)
3822
; /* This shouldn't happen */
3823
else if ((intf->channels[chan].medium
3824
== IPMI_CHANNEL_MEDIUM_8023LAN)
3825
|| (intf->channels[chan].medium
3826
== IPMI_CHANNEL_MEDIUM_ASYNC))
3827
ipmi_inc_stat(intf, sent_lan_command_errs);
3829
ipmi_inc_stat(intf, sent_ipmb_command_errs);
3830
intf_err_seq(intf, msg->msgid, msg->rsp[2]);
3832
/* The message was sent, start the timer. */
3833
intf_start_seq_timer(intf, msg->msgid);
3835
ipmi_free_smi_msg(msg);
3840
* To preserve message order, if the list is not empty, we
3841
* tack this message onto the end of the list.
3843
run_to_completion = intf->run_to_completion;
3844
if (!run_to_completion)
3845
spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
3846
if (!list_empty(&intf->waiting_msgs)) {
3847
list_add_tail(&msg->link, &intf->waiting_msgs);
3848
if (!run_to_completion)
3849
spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
3852
if (!run_to_completion)
3853
spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
3855
rv = handle_new_recv_msg(intf, msg);
3858
* Could not handle the message now, just add it to a
3859
* list to handle later.
3861
run_to_completion = intf->run_to_completion;
3862
if (!run_to_completion)
3863
spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
3864
list_add_tail(&msg->link, &intf->waiting_msgs);
3865
if (!run_to_completion)
3866
spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
3867
} else if (rv == 0) {
3868
ipmi_free_smi_msg(msg);
3874
EXPORT_SYMBOL(ipmi_smi_msg_received);
3876
void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf)
3881
list_for_each_entry_rcu(user, &intf->users, link) {
3882
if (!user->handler->ipmi_watchdog_pretimeout)
3885
user->handler->ipmi_watchdog_pretimeout(user->handler_data);
3889
EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout);
3891
static struct ipmi_smi_msg *
3892
smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg,
3893
unsigned char seq, long seqid)
3895
struct ipmi_smi_msg *smi_msg = ipmi_alloc_smi_msg();
3898
* If we can't allocate the message, then just return, we
3899
* get 4 retries, so this should be ok.
3903
memcpy(smi_msg->data, recv_msg->msg.data, recv_msg->msg.data_len);
3904
smi_msg->data_size = recv_msg->msg.data_len;
3905
smi_msg->msgid = STORE_SEQ_IN_MSGID(seq, seqid);
3911
for (m = 0; m < smi_msg->data_size; m++)
3912
printk(" %2.2x", smi_msg->data[m]);
3919
static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
3920
struct list_head *timeouts, long timeout_period,
3921
int slot, unsigned long *flags)
3923
struct ipmi_recv_msg *msg;
3924
struct ipmi_smi_handlers *handlers;
3926
if (intf->intf_num == -1)
3932
ent->timeout -= timeout_period;
3933
if (ent->timeout > 0)
3936
if (ent->retries_left == 0) {
3937
/* The message has used all its retries. */
3939
msg = ent->recv_msg;
3940
list_add_tail(&msg->link, timeouts);
3942
ipmi_inc_stat(intf, timed_out_ipmb_broadcasts);
3943
else if (is_lan_addr(&ent->recv_msg->addr))
3944
ipmi_inc_stat(intf, timed_out_lan_commands);
3946
ipmi_inc_stat(intf, timed_out_ipmb_commands);
3948
struct ipmi_smi_msg *smi_msg;
3949
/* More retries, send again. */
3952
* Start with the max timer, set to normal timer after
3953
* the message is sent.
3955
ent->timeout = MAX_MSG_TIMEOUT;
3956
ent->retries_left--;
3957
smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot,
3960
if (is_lan_addr(&ent->recv_msg->addr))
3962
dropped_rexmit_lan_commands);
3965
dropped_rexmit_ipmb_commands);
3969
spin_unlock_irqrestore(&intf->seq_lock, *flags);
3972
* Send the new message. We send with a zero
3973
* priority. It timed out, I doubt time is that
3974
* critical now, and high priority messages are really
3975
* only for messages to the local MC, which don't get
3978
handlers = intf->handlers;
3980
if (is_lan_addr(&ent->recv_msg->addr))
3982
retransmitted_lan_commands);
3985
retransmitted_ipmb_commands);
3987
intf->handlers->sender(intf->send_info,
3990
ipmi_free_smi_msg(smi_msg);
3992
spin_lock_irqsave(&intf->seq_lock, *flags);
3996
static void ipmi_timeout_handler(long timeout_period)
3999
struct list_head timeouts;
4000
struct ipmi_recv_msg *msg, *msg2;
4001
struct ipmi_smi_msg *smi_msg, *smi_msg2;
4002
unsigned long flags;
4006
list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
4007
/* See if any waiting messages need to be processed. */
4008
spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
4009
list_for_each_entry_safe(smi_msg, smi_msg2,
4010
&intf->waiting_msgs, link) {
4011
if (!handle_new_recv_msg(intf, smi_msg)) {
4012
list_del(&smi_msg->link);
4013
ipmi_free_smi_msg(smi_msg);
4016
* To preserve message order, quit if we
4017
* can't handle a message.
4022
spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
4025
* Go through the seq table and find any messages that
4026
* have timed out, putting them in the timeouts
4029
INIT_LIST_HEAD(&timeouts);
4030
spin_lock_irqsave(&intf->seq_lock, flags);
4031
for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++)
4032
check_msg_timeout(intf, &(intf->seq_table[i]),
4033
&timeouts, timeout_period, i,
4035
spin_unlock_irqrestore(&intf->seq_lock, flags);
4037
list_for_each_entry_safe(msg, msg2, &timeouts, link)
4038
deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE);
4041
* Maintenance mode handling. Check the timeout
4042
* optimistically before we claim the lock. It may
4043
* mean a timeout gets missed occasionally, but that
4044
* only means the timeout gets extended by one period
4045
* in that case. No big deal, and it avoids the lock
4048
if (intf->auto_maintenance_timeout > 0) {
4049
spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
4050
if (intf->auto_maintenance_timeout > 0) {
4051
intf->auto_maintenance_timeout
4053
if (!intf->maintenance_mode
4054
&& (intf->auto_maintenance_timeout <= 0)) {
4055
intf->maintenance_mode_enable = 0;
4056
maintenance_mode_update(intf);
4059
spin_unlock_irqrestore(&intf->maintenance_mode_lock,
4066
static void ipmi_request_event(void)
4069
struct ipmi_smi_handlers *handlers;
4073
* Called from the timer, no need to check if handlers is
4076
list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
4077
/* No event requests when in maintenance mode. */
4078
if (intf->maintenance_mode_enable)
4081
handlers = intf->handlers;
4083
handlers->request_events(intf->send_info);
4088
static struct timer_list ipmi_timer;
4090
/* Call every ~1000 ms. */
4091
#define IPMI_TIMEOUT_TIME 1000
4093
/* How many jiffies does it take to get to the timeout time. */
4094
#define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000)
4097
* Request events from the queue every second (this is the number of
4098
* IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the
4099
* future, IPMI will add a way to know immediately if an event is in
4100
* the queue and this silliness can go away.
4102
#define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME))
4104
static atomic_t stop_operation;
4105
static unsigned int ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
4107
static void ipmi_timeout(unsigned long data)
4109
if (atomic_read(&stop_operation))
4113
if (ticks_to_req_ev == 0) {
4114
ipmi_request_event();
4115
ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
4118
ipmi_timeout_handler(IPMI_TIMEOUT_TIME);
4120
mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
4124
static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0);
4125
static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0);
4127
/* FIXME - convert these to slabs. */
4128
static void free_smi_msg(struct ipmi_smi_msg *msg)
4130
atomic_dec(&smi_msg_inuse_count);
4134
struct ipmi_smi_msg *ipmi_alloc_smi_msg(void)
4136
struct ipmi_smi_msg *rv;
4137
rv = kmalloc(sizeof(struct ipmi_smi_msg), GFP_ATOMIC);
4139
rv->done = free_smi_msg;
4140
rv->user_data = NULL;
4141
atomic_inc(&smi_msg_inuse_count);
4145
EXPORT_SYMBOL(ipmi_alloc_smi_msg);
4147
static void free_recv_msg(struct ipmi_recv_msg *msg)
4149
atomic_dec(&recv_msg_inuse_count);
4153
static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void)
4155
struct ipmi_recv_msg *rv;
4157
rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC);
4160
rv->done = free_recv_msg;
4161
atomic_inc(&recv_msg_inuse_count);
4166
void ipmi_free_recv_msg(struct ipmi_recv_msg *msg)
4169
kref_put(&msg->user->refcount, free_user);
4172
EXPORT_SYMBOL(ipmi_free_recv_msg);
4174
#ifdef CONFIG_IPMI_PANIC_EVENT
4176
static void dummy_smi_done_handler(struct ipmi_smi_msg *msg)
4180
static void dummy_recv_done_handler(struct ipmi_recv_msg *msg)
4184
#ifdef CONFIG_IPMI_PANIC_STRING
4185
static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
4187
if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
4188
&& (msg->msg.netfn == IPMI_NETFN_SENSOR_EVENT_RESPONSE)
4189
&& (msg->msg.cmd == IPMI_GET_EVENT_RECEIVER_CMD)
4190
&& (msg->msg.data[0] == IPMI_CC_NO_ERROR)) {
4191
/* A get event receiver command, save it. */
4192
intf->event_receiver = msg->msg.data[1];
4193
intf->event_receiver_lun = msg->msg.data[2] & 0x3;
4197
static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
4199
if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
4200
&& (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE)
4201
&& (msg->msg.cmd == IPMI_GET_DEVICE_ID_CMD)
4202
&& (msg->msg.data[0] == IPMI_CC_NO_ERROR)) {
4204
* A get device id command, save if we are an event
4205
* receiver or generator.
4207
intf->local_sel_device = (msg->msg.data[6] >> 2) & 1;
4208
intf->local_event_generator = (msg->msg.data[6] >> 5) & 1;
4213
static void send_panic_events(char *str)
4215
struct kernel_ipmi_msg msg;
4217
unsigned char data[16];
4218
struct ipmi_system_interface_addr *si;
4219
struct ipmi_addr addr;
4220
struct ipmi_smi_msg smi_msg;
4221
struct ipmi_recv_msg recv_msg;
4223
si = (struct ipmi_system_interface_addr *) &addr;
4224
si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
4225
si->channel = IPMI_BMC_CHANNEL;
4228
/* Fill in an event telling that we have failed. */
4229
msg.netfn = 0x04; /* Sensor or Event. */
4230
msg.cmd = 2; /* Platform event command. */
4233
data[0] = 0x41; /* Kernel generator ID, IPMI table 5-4 */
4234
data[1] = 0x03; /* This is for IPMI 1.0. */
4235
data[2] = 0x20; /* OS Critical Stop, IPMI table 36-3 */
4236
data[4] = 0x6f; /* Sensor specific, IPMI table 36-1 */
4237
data[5] = 0xa1; /* Runtime stop OEM bytes 2 & 3. */
4240
* Put a few breadcrumbs in. Hopefully later we can add more things
4241
* to make the panic events more useful.
4249
smi_msg.done = dummy_smi_done_handler;
4250
recv_msg.done = dummy_recv_done_handler;
4252
/* For every registered interface, send the event. */
4253
list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
4254
if (!intf->handlers)
4255
/* Interface is not ready. */
4258
intf->run_to_completion = 1;
4259
/* Send the event announcing the panic. */
4260
intf->handlers->set_run_to_completion(intf->send_info, 1);
4261
i_ipmi_request(NULL,
4270
intf->channels[0].address,
4271
intf->channels[0].lun,
4272
0, 1); /* Don't retry, and don't wait. */
4275
#ifdef CONFIG_IPMI_PANIC_STRING
4277
* On every interface, dump a bunch of OEM event holding the
4283
/* For every registered interface, send the event. */
4284
list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
4286
struct ipmi_ipmb_addr *ipmb;
4289
if (intf->intf_num == -1)
4290
/* Interface was not ready yet. */
4294
* intf_num is used as an marker to tell if the
4295
* interface is valid. Thus we need a read barrier to
4296
* make sure data fetched before checking intf_num
4302
* First job here is to figure out where to send the
4303
* OEM events. There's no way in IPMI to send OEM
4304
* events using an event send command, so we have to
4305
* find the SEL to put them in and stick them in
4309
/* Get capabilities from the get device id. */
4310
intf->local_sel_device = 0;
4311
intf->local_event_generator = 0;
4312
intf->event_receiver = 0;
4314
/* Request the device info from the local MC. */
4315
msg.netfn = IPMI_NETFN_APP_REQUEST;
4316
msg.cmd = IPMI_GET_DEVICE_ID_CMD;
4319
intf->null_user_handler = device_id_fetcher;
4320
i_ipmi_request(NULL,
4329
intf->channels[0].address,
4330
intf->channels[0].lun,
4331
0, 1); /* Don't retry, and don't wait. */
4333
if (intf->local_event_generator) {
4334
/* Request the event receiver from the local MC. */
4335
msg.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST;
4336
msg.cmd = IPMI_GET_EVENT_RECEIVER_CMD;
4339
intf->null_user_handler = event_receiver_fetcher;
4340
i_ipmi_request(NULL,
4349
intf->channels[0].address,
4350
intf->channels[0].lun,
4351
0, 1); /* no retry, and no wait. */
4353
intf->null_user_handler = NULL;
4356
* Validate the event receiver. The low bit must not
4357
* be 1 (it must be a valid IPMB address), it cannot
4358
* be zero, and it must not be my address.
4360
if (((intf->event_receiver & 1) == 0)
4361
&& (intf->event_receiver != 0)
4362
&& (intf->event_receiver != intf->channels[0].address)) {
4364
* The event receiver is valid, send an IPMB
4367
ipmb = (struct ipmi_ipmb_addr *) &addr;
4368
ipmb->addr_type = IPMI_IPMB_ADDR_TYPE;
4369
ipmb->channel = 0; /* FIXME - is this right? */
4370
ipmb->lun = intf->event_receiver_lun;
4371
ipmb->slave_addr = intf->event_receiver;
4372
} else if (intf->local_sel_device) {
4374
* The event receiver was not valid (or was
4375
* me), but I am an SEL device, just dump it
4378
si = (struct ipmi_system_interface_addr *) &addr;
4379
si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
4380
si->channel = IPMI_BMC_CHANNEL;
4383
continue; /* No where to send the event. */
4385
msg.netfn = IPMI_NETFN_STORAGE_REQUEST; /* Storage. */
4386
msg.cmd = IPMI_ADD_SEL_ENTRY_CMD;
4392
int size = strlen(p);
4398
data[2] = 0xf0; /* OEM event without timestamp. */
4399
data[3] = intf->channels[0].address;
4400
data[4] = j++; /* sequence # */
4402
* Always give 11 bytes, so strncpy will fill
4403
* it with zeroes for me.
4405
strncpy(data+5, p, 11);
4408
i_ipmi_request(NULL,
4417
intf->channels[0].address,
4418
intf->channels[0].lun,
4419
0, 1); /* no retry, and no wait. */
4422
#endif /* CONFIG_IPMI_PANIC_STRING */
4424
#endif /* CONFIG_IPMI_PANIC_EVENT */
4426
static int has_panicked;
4428
static int panic_event(struct notifier_block *this,
4429
unsigned long event,
4438
/* For every registered interface, set it to run to completion. */
4439
list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
4440
if (!intf->handlers)
4441
/* Interface is not ready. */
4444
intf->run_to_completion = 1;
4445
intf->handlers->set_run_to_completion(intf->send_info, 1);
4448
#ifdef CONFIG_IPMI_PANIC_EVENT
4449
send_panic_events(ptr);
4455
static struct notifier_block panic_block = {
4456
.notifier_call = panic_event,
4458
.priority = 200 /* priority: INT_MAX >= x >= 0 */
4461
static int ipmi_init_msghandler(void)
4468
rv = driver_register(&ipmidriver.driver);
4470
printk(KERN_ERR PFX "Could not register IPMI driver\n");
4474
printk(KERN_INFO "ipmi message handler version "
4475
IPMI_DRIVER_VERSION "\n");
4477
#ifdef CONFIG_PROC_FS
4478
proc_ipmi_root = proc_mkdir("ipmi", NULL);
4479
if (!proc_ipmi_root) {
4480
printk(KERN_ERR PFX "Unable to create IPMI proc dir");
4484
#endif /* CONFIG_PROC_FS */
4486
setup_timer(&ipmi_timer, ipmi_timeout, 0);
4487
mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
4489
atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
4496
static int __init ipmi_init_msghandler_mod(void)
4498
ipmi_init_msghandler();
4502
static void __exit cleanup_ipmi(void)
4509
atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block);
4512
* This can't be called if any interfaces exist, so no worry
4513
* about shutting down the interfaces.
4517
* Tell the timer to stop, then wait for it to stop. This
4518
* avoids problems with race conditions removing the timer
4521
atomic_inc(&stop_operation);
4522
del_timer_sync(&ipmi_timer);
4524
#ifdef CONFIG_PROC_FS
4525
remove_proc_entry(proc_ipmi_root->name, NULL);
4526
#endif /* CONFIG_PROC_FS */
4528
driver_unregister(&ipmidriver.driver);
4532
/* Check for buffer leaks. */
4533
count = atomic_read(&smi_msg_inuse_count);
4535
printk(KERN_WARNING PFX "SMI message count %d at exit\n",
4537
count = atomic_read(&recv_msg_inuse_count);
4539
printk(KERN_WARNING PFX "recv message count %d at exit\n",
4542
module_exit(cleanup_ipmi);
4544
module_init(ipmi_init_msghandler_mod);
4545
MODULE_LICENSE("GPL");
4546
MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
4547
MODULE_DESCRIPTION("Incoming and outgoing message routing for an IPMI"
4549
MODULE_VERSION(IPMI_DRIVER_VERSION);