mirror of https://gitee.com/openkylin/linux.git
4333 lines
110 KiB
C
4333 lines
110 KiB
C
/*
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* ipmi_msghandler.c
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*
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* Incoming and outgoing message routing for an IPMI interface.
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*
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* Author: MontaVista Software, Inc.
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* Corey Minyard <minyard@mvista.com>
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* source@mvista.com
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*
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* Copyright 2002 MontaVista Software Inc.
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*
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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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*
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*
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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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*
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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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*/
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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/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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#ifdef CONFIG_PROC_FS
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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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/*
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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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*/
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#define MAX_MSG_TIMEOUT 60000
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/*
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* The main "user" data structure.
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*/
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struct ipmi_user {
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struct list_head link;
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/* Set to "0" when the user is destroyed. */
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int valid;
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struct kref refcount;
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/* The upper layer that handles receive messages. */
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struct ipmi_user_hndl *handler;
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void *handler_data;
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/* The interface this user is bound to. */
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ipmi_smi_t intf;
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/* Does this interface receive IPMI events? */
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int gets_events;
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};
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struct cmd_rcvr {
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struct list_head link;
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ipmi_user_t user;
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unsigned char netfn;
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unsigned char cmd;
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unsigned int chans;
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/*
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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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*/
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struct cmd_rcvr *next;
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};
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struct seq_table {
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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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/*
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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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*/
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long seqid;
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/*
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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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*/
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struct ipmi_recv_msg *recv_msg;
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};
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/*
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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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*/
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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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do { \
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seq = ((msgid >> 26) & 0x3f); \
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seqid = (msgid & 0x3fffff); \
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} while (0)
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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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/*
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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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*/
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unsigned char address;
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/*
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* My LUN. This should generally stay the SMS LUN, but just in
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* case...
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*/
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unsigned char lun;
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};
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#ifdef CONFIG_PROC_FS
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struct ipmi_proc_entry {
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char *name;
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struct ipmi_proc_entry *next;
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};
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#endif
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struct bmc_device {
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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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int guid_set;
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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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};
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/*
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* Various statistics for IPMI, these index stats[] in the ipmi_smi
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* structure.
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*/
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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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/*
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* When a message times out (runs out of retransmits) this is
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* incremented.
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*/
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IPMI_STAT_timed_out_ipmb_commands,
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/*
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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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* time out).
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*/
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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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/*
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* When a message times out (runs out of retransmits) this is
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* incremented.
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*/
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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,
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/* 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. */
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IPMI_STAT_invalid_events,
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/* Events that were received with the proper format. */
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IPMI_STAT_events,
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/* This *must* remain last, add new values above this. */
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IPMI_NUM_STATS
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};
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#define IPMI_IPMB_NUM_SEQ 64
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#define IPMI_MAX_CHANNELS 16
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struct ipmi_smi {
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/* What interface number are we? */
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int intf_num;
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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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/*
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* The list of upper layers that are using me. seq_lock
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* protects this.
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*/
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struct list_head users;
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/* Information to supply to users. */
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unsigned char ipmi_version_major;
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unsigned char ipmi_version_minor;
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/* 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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char *my_dev_name;
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char *sysfs_name;
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/*
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* This is the lower-layer's sender routine. Note that you
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* 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
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* value into a local variable and make sure it is not NULL.
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*/
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struct ipmi_smi_handlers *handlers;
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void *send_info;
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#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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#endif
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/* Driver-model device for the system interface. */
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struct device *si_dev;
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/*
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* 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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*/
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spinlock_t seq_lock;
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struct seq_table seq_table[IPMI_IPMB_NUM_SEQ];
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int curr_seq;
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/*
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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.
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*/
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spinlock_t waiting_msgs_lock;
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struct list_head waiting_msgs;
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/*
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* The list of command receivers that are registered for commands
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* on this interface.
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*/
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struct mutex cmd_rcvrs_mutex;
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struct list_head cmd_rcvrs;
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/*
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* Events that were queues because no one was there to receive
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* them.
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*/
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spinlock_t events_lock; /* For dealing with event stuff. */
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struct list_head waiting_events;
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unsigned int waiting_events_count; /* How many events in queue? */
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char delivering_events;
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char event_msg_printed;
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/*
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* The event receiver for my BMC, only really used at panic
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* shutdown as a place to store this.
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*/
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unsigned char event_receiver;
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unsigned char event_receiver_lun;
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unsigned char local_sel_device;
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unsigned char local_event_generator;
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/* For handling of maintenance mode. */
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int maintenance_mode;
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int maintenance_mode_enable;
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int auto_maintenance_timeout;
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spinlock_t maintenance_mode_lock; /* Used in a timer... */
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/*
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* 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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*/
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void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_recv_msg *msg);
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/*
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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.
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*/
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int curr_channel;
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/* Channel information */
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struct ipmi_channel channels[IPMI_MAX_CHANNELS];
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/* Proc FS stuff. */
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struct proc_dir_entry *proc_dir;
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char proc_dir_name[10];
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atomic_t stats[IPMI_NUM_STATS];
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/*
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* run_to_completion duplicate of smb_info, smi_info
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* and ipmi_serial_info structures. Used to decrease numbers of
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* parameters passed by "low" level IPMI code.
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*/
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int run_to_completion;
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};
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#define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev)
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/**
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* The driver model view of the IPMI messaging driver.
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*/
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static struct device_driver ipmidriver = {
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.name = "ipmi",
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.bus = &platform_bus_type
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};
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static DEFINE_MUTEX(ipmidriver_mutex);
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static LIST_HEAD(ipmi_interfaces);
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static DEFINE_MUTEX(ipmi_interfaces_mutex);
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/*
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* List of watchers that want to know when smi's are added and deleted.
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*/
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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]))
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static void free_recv_msg_list(struct list_head *q)
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{
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struct ipmi_recv_msg *msg, *msg2;
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list_for_each_entry_safe(msg, msg2, q, link) {
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list_del(&msg->link);
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ipmi_free_recv_msg(msg);
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}
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}
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static void free_smi_msg_list(struct list_head *q)
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{
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struct ipmi_smi_msg *msg, *msg2;
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list_for_each_entry_safe(msg, msg2, q, link) {
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list_del(&msg->link);
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ipmi_free_smi_msg(msg);
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}
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}
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static void clean_up_interface_data(ipmi_smi_t intf)
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{
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int i;
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struct cmd_rcvr *rcvr, *rcvr2;
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struct list_head list;
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free_smi_msg_list(&intf->waiting_msgs);
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free_recv_msg_list(&intf->waiting_events);
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/*
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* Wholesale remove all the entries from the list in the
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* interface and wait for RCU to know that none are in use.
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*/
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mutex_lock(&intf->cmd_rcvrs_mutex);
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INIT_LIST_HEAD(&list);
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list_splice_init_rcu(&intf->cmd_rcvrs, &list, synchronize_rcu);
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mutex_unlock(&intf->cmd_rcvrs_mutex);
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list_for_each_entry_safe(rcvr, rcvr2, &list, link)
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kfree(rcvr);
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for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
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if ((intf->seq_table[i].inuse)
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&& (intf->seq_table[i].recv_msg))
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ipmi_free_recv_msg(intf->seq_table[i].recv_msg);
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}
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}
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static void intf_free(struct kref *ref)
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{
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ipmi_smi_t intf = container_of(ref, struct ipmi_smi, refcount);
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clean_up_interface_data(intf);
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kfree(intf);
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}
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struct watcher_entry {
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int intf_num;
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ipmi_smi_t intf;
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struct list_head link;
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};
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|
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int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher)
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{
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ipmi_smi_t intf;
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LIST_HEAD(to_deliver);
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struct watcher_entry *e, *e2;
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mutex_lock(&smi_watchers_mutex);
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mutex_lock(&ipmi_interfaces_mutex);
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/* Build a list of things to deliver. */
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list_for_each_entry(intf, &ipmi_interfaces, link) {
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if (intf->intf_num == -1)
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continue;
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e = kmalloc(sizeof(*e), GFP_KERNEL);
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if (!e)
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goto out_err;
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kref_get(&intf->refcount);
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e->intf = intf;
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e->intf_num = intf->intf_num;
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list_add_tail(&e->link, &to_deliver);
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}
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/* We will succeed, so add it to the list. */
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list_add(&watcher->link, &smi_watchers);
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mutex_unlock(&ipmi_interfaces_mutex);
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list_for_each_entry_safe(e, e2, &to_deliver, link) {
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list_del(&e->link);
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watcher->new_smi(e->intf_num, e->intf->si_dev);
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kref_put(&e->intf->refcount, intf_free);
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|
kfree(e);
|
|
}
|
|
|
|
mutex_unlock(&smi_watchers_mutex);
|
|
|
|
return 0;
|
|
|
|
out_err:
|
|
mutex_unlock(&ipmi_interfaces_mutex);
|
|
mutex_unlock(&smi_watchers_mutex);
|
|
list_for_each_entry_safe(e, e2, &to_deliver, link) {
|
|
list_del(&e->link);
|
|
kref_put(&e->intf->refcount, intf_free);
|
|
kfree(e);
|
|
}
|
|
return -ENOMEM;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_smi_watcher_register);
|
|
|
|
int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher)
|
|
{
|
|
mutex_lock(&smi_watchers_mutex);
|
|
list_del(&(watcher->link));
|
|
mutex_unlock(&smi_watchers_mutex);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_smi_watcher_unregister);
|
|
|
|
/*
|
|
* Must be called with smi_watchers_mutex held.
|
|
*/
|
|
static void
|
|
call_smi_watchers(int i, struct device *dev)
|
|
{
|
|
struct ipmi_smi_watcher *w;
|
|
|
|
list_for_each_entry(w, &smi_watchers, link) {
|
|
if (try_module_get(w->owner)) {
|
|
w->new_smi(i, dev);
|
|
module_put(w->owner);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int
|
|
ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2)
|
|
{
|
|
if (addr1->addr_type != addr2->addr_type)
|
|
return 0;
|
|
|
|
if (addr1->channel != addr2->channel)
|
|
return 0;
|
|
|
|
if (addr1->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
|
|
struct ipmi_system_interface_addr *smi_addr1
|
|
= (struct ipmi_system_interface_addr *) addr1;
|
|
struct ipmi_system_interface_addr *smi_addr2
|
|
= (struct ipmi_system_interface_addr *) addr2;
|
|
return (smi_addr1->lun == smi_addr2->lun);
|
|
}
|
|
|
|
if ((addr1->addr_type == IPMI_IPMB_ADDR_TYPE)
|
|
|| (addr1->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) {
|
|
struct ipmi_ipmb_addr *ipmb_addr1
|
|
= (struct ipmi_ipmb_addr *) addr1;
|
|
struct ipmi_ipmb_addr *ipmb_addr2
|
|
= (struct ipmi_ipmb_addr *) addr2;
|
|
|
|
return ((ipmb_addr1->slave_addr == ipmb_addr2->slave_addr)
|
|
&& (ipmb_addr1->lun == ipmb_addr2->lun));
|
|
}
|
|
|
|
if (addr1->addr_type == IPMI_LAN_ADDR_TYPE) {
|
|
struct ipmi_lan_addr *lan_addr1
|
|
= (struct ipmi_lan_addr *) addr1;
|
|
struct ipmi_lan_addr *lan_addr2
|
|
= (struct ipmi_lan_addr *) addr2;
|
|
|
|
return ((lan_addr1->remote_SWID == lan_addr2->remote_SWID)
|
|
&& (lan_addr1->local_SWID == lan_addr2->local_SWID)
|
|
&& (lan_addr1->session_handle
|
|
== lan_addr2->session_handle)
|
|
&& (lan_addr1->lun == lan_addr2->lun));
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
int ipmi_validate_addr(struct ipmi_addr *addr, int len)
|
|
{
|
|
if (len < sizeof(struct ipmi_system_interface_addr))
|
|
return -EINVAL;
|
|
|
|
if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
|
|
if (addr->channel != IPMI_BMC_CHANNEL)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
if ((addr->channel == IPMI_BMC_CHANNEL)
|
|
|| (addr->channel >= IPMI_MAX_CHANNELS)
|
|
|| (addr->channel < 0))
|
|
return -EINVAL;
|
|
|
|
if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE)
|
|
|| (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) {
|
|
if (len < sizeof(struct ipmi_ipmb_addr))
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
if (addr->addr_type == IPMI_LAN_ADDR_TYPE) {
|
|
if (len < sizeof(struct ipmi_lan_addr))
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_validate_addr);
|
|
|
|
unsigned int ipmi_addr_length(int addr_type)
|
|
{
|
|
if (addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
|
|
return sizeof(struct ipmi_system_interface_addr);
|
|
|
|
if ((addr_type == IPMI_IPMB_ADDR_TYPE)
|
|
|| (addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE))
|
|
return sizeof(struct ipmi_ipmb_addr);
|
|
|
|
if (addr_type == IPMI_LAN_ADDR_TYPE)
|
|
return sizeof(struct ipmi_lan_addr);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_addr_length);
|
|
|
|
static void deliver_response(struct ipmi_recv_msg *msg)
|
|
{
|
|
if (!msg->user) {
|
|
ipmi_smi_t intf = msg->user_msg_data;
|
|
|
|
/* Special handling for NULL users. */
|
|
if (intf->null_user_handler) {
|
|
intf->null_user_handler(intf, msg);
|
|
ipmi_inc_stat(intf, handled_local_responses);
|
|
} else {
|
|
/* No handler, so give up. */
|
|
ipmi_inc_stat(intf, unhandled_local_responses);
|
|
}
|
|
ipmi_free_recv_msg(msg);
|
|
} else {
|
|
ipmi_user_t user = msg->user;
|
|
user->handler->ipmi_recv_hndl(msg, user->handler_data);
|
|
}
|
|
}
|
|
|
|
static void
|
|
deliver_err_response(struct ipmi_recv_msg *msg, int err)
|
|
{
|
|
msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
|
|
msg->msg_data[0] = err;
|
|
msg->msg.netfn |= 1; /* Convert to a response. */
|
|
msg->msg.data_len = 1;
|
|
msg->msg.data = msg->msg_data;
|
|
deliver_response(msg);
|
|
}
|
|
|
|
/*
|
|
* Find the next sequence number not being used and add the given
|
|
* message with the given timeout to the sequence table. This must be
|
|
* called with the interface's seq_lock held.
|
|
*/
|
|
static int intf_next_seq(ipmi_smi_t intf,
|
|
struct ipmi_recv_msg *recv_msg,
|
|
unsigned long timeout,
|
|
int retries,
|
|
int broadcast,
|
|
unsigned char *seq,
|
|
long *seqid)
|
|
{
|
|
int rv = 0;
|
|
unsigned int i;
|
|
|
|
for (i = intf->curr_seq; (i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq;
|
|
i = (i+1)%IPMI_IPMB_NUM_SEQ) {
|
|
if (!intf->seq_table[i].inuse)
|
|
break;
|
|
}
|
|
|
|
if (!intf->seq_table[i].inuse) {
|
|
intf->seq_table[i].recv_msg = recv_msg;
|
|
|
|
/*
|
|
* Start with the maximum timeout, when the send response
|
|
* comes in we will start the real timer.
|
|
*/
|
|
intf->seq_table[i].timeout = MAX_MSG_TIMEOUT;
|
|
intf->seq_table[i].orig_timeout = timeout;
|
|
intf->seq_table[i].retries_left = retries;
|
|
intf->seq_table[i].broadcast = broadcast;
|
|
intf->seq_table[i].inuse = 1;
|
|
intf->seq_table[i].seqid = NEXT_SEQID(intf->seq_table[i].seqid);
|
|
*seq = i;
|
|
*seqid = intf->seq_table[i].seqid;
|
|
intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ;
|
|
} else {
|
|
rv = -EAGAIN;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* Return the receive message for the given sequence number and
|
|
* release the sequence number so it can be reused. Some other data
|
|
* is passed in to be sure the message matches up correctly (to help
|
|
* guard against message coming in after their timeout and the
|
|
* sequence number being reused).
|
|
*/
|
|
static int intf_find_seq(ipmi_smi_t intf,
|
|
unsigned char seq,
|
|
short channel,
|
|
unsigned char cmd,
|
|
unsigned char netfn,
|
|
struct ipmi_addr *addr,
|
|
struct ipmi_recv_msg **recv_msg)
|
|
{
|
|
int rv = -ENODEV;
|
|
unsigned long flags;
|
|
|
|
if (seq >= IPMI_IPMB_NUM_SEQ)
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&(intf->seq_lock), flags);
|
|
if (intf->seq_table[seq].inuse) {
|
|
struct ipmi_recv_msg *msg = intf->seq_table[seq].recv_msg;
|
|
|
|
if ((msg->addr.channel == channel) && (msg->msg.cmd == cmd)
|
|
&& (msg->msg.netfn == netfn)
|
|
&& (ipmi_addr_equal(addr, &(msg->addr)))) {
|
|
*recv_msg = msg;
|
|
intf->seq_table[seq].inuse = 0;
|
|
rv = 0;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&(intf->seq_lock), flags);
|
|
|
|
return rv;
|
|
}
|
|
|
|
|
|
/* Start the timer for a specific sequence table entry. */
|
|
static int intf_start_seq_timer(ipmi_smi_t intf,
|
|
long msgid)
|
|
{
|
|
int rv = -ENODEV;
|
|
unsigned long flags;
|
|
unsigned char seq;
|
|
unsigned long seqid;
|
|
|
|
|
|
GET_SEQ_FROM_MSGID(msgid, seq, seqid);
|
|
|
|
spin_lock_irqsave(&(intf->seq_lock), flags);
|
|
/*
|
|
* We do this verification because the user can be deleted
|
|
* while a message is outstanding.
|
|
*/
|
|
if ((intf->seq_table[seq].inuse)
|
|
&& (intf->seq_table[seq].seqid == seqid)) {
|
|
struct seq_table *ent = &(intf->seq_table[seq]);
|
|
ent->timeout = ent->orig_timeout;
|
|
rv = 0;
|
|
}
|
|
spin_unlock_irqrestore(&(intf->seq_lock), flags);
|
|
|
|
return rv;
|
|
}
|
|
|
|
/* Got an error for the send message for a specific sequence number. */
|
|
static int intf_err_seq(ipmi_smi_t intf,
|
|
long msgid,
|
|
unsigned int err)
|
|
{
|
|
int rv = -ENODEV;
|
|
unsigned long flags;
|
|
unsigned char seq;
|
|
unsigned long seqid;
|
|
struct ipmi_recv_msg *msg = NULL;
|
|
|
|
|
|
GET_SEQ_FROM_MSGID(msgid, seq, seqid);
|
|
|
|
spin_lock_irqsave(&(intf->seq_lock), flags);
|
|
/*
|
|
* We do this verification because the user can be deleted
|
|
* while a message is outstanding.
|
|
*/
|
|
if ((intf->seq_table[seq].inuse)
|
|
&& (intf->seq_table[seq].seqid == seqid)) {
|
|
struct seq_table *ent = &(intf->seq_table[seq]);
|
|
|
|
ent->inuse = 0;
|
|
msg = ent->recv_msg;
|
|
rv = 0;
|
|
}
|
|
spin_unlock_irqrestore(&(intf->seq_lock), flags);
|
|
|
|
if (msg)
|
|
deliver_err_response(msg, err);
|
|
|
|
return rv;
|
|
}
|
|
|
|
|
|
int ipmi_create_user(unsigned int if_num,
|
|
struct ipmi_user_hndl *handler,
|
|
void *handler_data,
|
|
ipmi_user_t *user)
|
|
{
|
|
unsigned long flags;
|
|
ipmi_user_t new_user;
|
|
int rv = 0;
|
|
ipmi_smi_t intf;
|
|
|
|
/*
|
|
* There is no module usecount here, because it's not
|
|
* required. Since this can only be used by and called from
|
|
* other modules, they will implicitly use this module, and
|
|
* thus this can't be removed unless the other modules are
|
|
* removed.
|
|
*/
|
|
|
|
if (handler == NULL)
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* Make sure the driver is actually initialized, this handles
|
|
* problems with initialization order.
|
|
*/
|
|
if (!initialized) {
|
|
rv = ipmi_init_msghandler();
|
|
if (rv)
|
|
return rv;
|
|
|
|
/*
|
|
* The init code doesn't return an error if it was turned
|
|
* off, but it won't initialize. Check that.
|
|
*/
|
|
if (!initialized)
|
|
return -ENODEV;
|
|
}
|
|
|
|
new_user = kmalloc(sizeof(*new_user), GFP_KERNEL);
|
|
if (!new_user)
|
|
return -ENOMEM;
|
|
|
|
mutex_lock(&ipmi_interfaces_mutex);
|
|
list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
|
|
if (intf->intf_num == if_num)
|
|
goto found;
|
|
}
|
|
/* Not found, return an error */
|
|
rv = -EINVAL;
|
|
goto out_kfree;
|
|
|
|
found:
|
|
/* Note that each existing user holds a refcount to the interface. */
|
|
kref_get(&intf->refcount);
|
|
|
|
kref_init(&new_user->refcount);
|
|
new_user->handler = handler;
|
|
new_user->handler_data = handler_data;
|
|
new_user->intf = intf;
|
|
new_user->gets_events = 0;
|
|
|
|
if (!try_module_get(intf->handlers->owner)) {
|
|
rv = -ENODEV;
|
|
goto out_kref;
|
|
}
|
|
|
|
if (intf->handlers->inc_usecount) {
|
|
rv = intf->handlers->inc_usecount(intf->send_info);
|
|
if (rv) {
|
|
module_put(intf->handlers->owner);
|
|
goto out_kref;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Hold the lock so intf->handlers is guaranteed to be good
|
|
* until now
|
|
*/
|
|
mutex_unlock(&ipmi_interfaces_mutex);
|
|
|
|
new_user->valid = 1;
|
|
spin_lock_irqsave(&intf->seq_lock, flags);
|
|
list_add_rcu(&new_user->link, &intf->users);
|
|
spin_unlock_irqrestore(&intf->seq_lock, flags);
|
|
*user = new_user;
|
|
return 0;
|
|
|
|
out_kref:
|
|
kref_put(&intf->refcount, intf_free);
|
|
out_kfree:
|
|
mutex_unlock(&ipmi_interfaces_mutex);
|
|
kfree(new_user);
|
|
return rv;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_create_user);
|
|
|
|
static void free_user(struct kref *ref)
|
|
{
|
|
ipmi_user_t user = container_of(ref, struct ipmi_user, refcount);
|
|
kfree(user);
|
|
}
|
|
|
|
int ipmi_destroy_user(ipmi_user_t user)
|
|
{
|
|
ipmi_smi_t intf = user->intf;
|
|
int i;
|
|
unsigned long flags;
|
|
struct cmd_rcvr *rcvr;
|
|
struct cmd_rcvr *rcvrs = NULL;
|
|
|
|
user->valid = 0;
|
|
|
|
/* Remove the user from the interface's sequence table. */
|
|
spin_lock_irqsave(&intf->seq_lock, flags);
|
|
list_del_rcu(&user->link);
|
|
|
|
for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
|
|
if (intf->seq_table[i].inuse
|
|
&& (intf->seq_table[i].recv_msg->user == user)) {
|
|
intf->seq_table[i].inuse = 0;
|
|
ipmi_free_recv_msg(intf->seq_table[i].recv_msg);
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&intf->seq_lock, flags);
|
|
|
|
/*
|
|
* Remove the user from the command receiver's table. First
|
|
* we build a list of everything (not using the standard link,
|
|
* since other things may be using it till we do
|
|
* synchronize_rcu()) then free everything in that list.
|
|
*/
|
|
mutex_lock(&intf->cmd_rcvrs_mutex);
|
|
list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
|
|
if (rcvr->user == user) {
|
|
list_del_rcu(&rcvr->link);
|
|
rcvr->next = rcvrs;
|
|
rcvrs = rcvr;
|
|
}
|
|
}
|
|
mutex_unlock(&intf->cmd_rcvrs_mutex);
|
|
synchronize_rcu();
|
|
while (rcvrs) {
|
|
rcvr = rcvrs;
|
|
rcvrs = rcvr->next;
|
|
kfree(rcvr);
|
|
}
|
|
|
|
mutex_lock(&ipmi_interfaces_mutex);
|
|
if (intf->handlers) {
|
|
module_put(intf->handlers->owner);
|
|
if (intf->handlers->dec_usecount)
|
|
intf->handlers->dec_usecount(intf->send_info);
|
|
}
|
|
mutex_unlock(&ipmi_interfaces_mutex);
|
|
|
|
kref_put(&intf->refcount, intf_free);
|
|
|
|
kref_put(&user->refcount, free_user);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_destroy_user);
|
|
|
|
void ipmi_get_version(ipmi_user_t user,
|
|
unsigned char *major,
|
|
unsigned char *minor)
|
|
{
|
|
*major = user->intf->ipmi_version_major;
|
|
*minor = user->intf->ipmi_version_minor;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_get_version);
|
|
|
|
int ipmi_set_my_address(ipmi_user_t user,
|
|
unsigned int channel,
|
|
unsigned char address)
|
|
{
|
|
if (channel >= IPMI_MAX_CHANNELS)
|
|
return -EINVAL;
|
|
user->intf->channels[channel].address = address;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_set_my_address);
|
|
|
|
int ipmi_get_my_address(ipmi_user_t user,
|
|
unsigned int channel,
|
|
unsigned char *address)
|
|
{
|
|
if (channel >= IPMI_MAX_CHANNELS)
|
|
return -EINVAL;
|
|
*address = user->intf->channels[channel].address;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_get_my_address);
|
|
|
|
int ipmi_set_my_LUN(ipmi_user_t user,
|
|
unsigned int channel,
|
|
unsigned char LUN)
|
|
{
|
|
if (channel >= IPMI_MAX_CHANNELS)
|
|
return -EINVAL;
|
|
user->intf->channels[channel].lun = LUN & 0x3;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_set_my_LUN);
|
|
|
|
int ipmi_get_my_LUN(ipmi_user_t user,
|
|
unsigned int channel,
|
|
unsigned char *address)
|
|
{
|
|
if (channel >= IPMI_MAX_CHANNELS)
|
|
return -EINVAL;
|
|
*address = user->intf->channels[channel].lun;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_get_my_LUN);
|
|
|
|
int ipmi_get_maintenance_mode(ipmi_user_t user)
|
|
{
|
|
int mode;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&user->intf->maintenance_mode_lock, flags);
|
|
mode = user->intf->maintenance_mode;
|
|
spin_unlock_irqrestore(&user->intf->maintenance_mode_lock, flags);
|
|
|
|
return mode;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_get_maintenance_mode);
|
|
|
|
static void maintenance_mode_update(ipmi_smi_t intf)
|
|
{
|
|
if (intf->handlers->set_maintenance_mode)
|
|
intf->handlers->set_maintenance_mode(
|
|
intf->send_info, intf->maintenance_mode_enable);
|
|
}
|
|
|
|
int ipmi_set_maintenance_mode(ipmi_user_t user, int mode)
|
|
{
|
|
int rv = 0;
|
|
unsigned long flags;
|
|
ipmi_smi_t intf = user->intf;
|
|
|
|
spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
|
|
if (intf->maintenance_mode != mode) {
|
|
switch (mode) {
|
|
case IPMI_MAINTENANCE_MODE_AUTO:
|
|
intf->maintenance_mode = mode;
|
|
intf->maintenance_mode_enable
|
|
= (intf->auto_maintenance_timeout > 0);
|
|
break;
|
|
|
|
case IPMI_MAINTENANCE_MODE_OFF:
|
|
intf->maintenance_mode = mode;
|
|
intf->maintenance_mode_enable = 0;
|
|
break;
|
|
|
|
case IPMI_MAINTENANCE_MODE_ON:
|
|
intf->maintenance_mode = mode;
|
|
intf->maintenance_mode_enable = 1;
|
|
break;
|
|
|
|
default:
|
|
rv = -EINVAL;
|
|
goto out_unlock;
|
|
}
|
|
|
|
maintenance_mode_update(intf);
|
|
}
|
|
out_unlock:
|
|
spin_unlock_irqrestore(&intf->maintenance_mode_lock, flags);
|
|
|
|
return rv;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_set_maintenance_mode);
|
|
|
|
int ipmi_set_gets_events(ipmi_user_t user, int val)
|
|
{
|
|
unsigned long flags;
|
|
ipmi_smi_t intf = user->intf;
|
|
struct ipmi_recv_msg *msg, *msg2;
|
|
struct list_head msgs;
|
|
|
|
INIT_LIST_HEAD(&msgs);
|
|
|
|
spin_lock_irqsave(&intf->events_lock, flags);
|
|
user->gets_events = val;
|
|
|
|
if (intf->delivering_events)
|
|
/*
|
|
* Another thread is delivering events for this, so
|
|
* let it handle any new events.
|
|
*/
|
|
goto out;
|
|
|
|
/* Deliver any queued events. */
|
|
while (user->gets_events && !list_empty(&intf->waiting_events)) {
|
|
list_for_each_entry_safe(msg, msg2, &intf->waiting_events, link)
|
|
list_move_tail(&msg->link, &msgs);
|
|
intf->waiting_events_count = 0;
|
|
if (intf->event_msg_printed) {
|
|
printk(KERN_WARNING PFX "Event queue no longer"
|
|
" full\n");
|
|
intf->event_msg_printed = 0;
|
|
}
|
|
|
|
intf->delivering_events = 1;
|
|
spin_unlock_irqrestore(&intf->events_lock, flags);
|
|
|
|
list_for_each_entry_safe(msg, msg2, &msgs, link) {
|
|
msg->user = user;
|
|
kref_get(&user->refcount);
|
|
deliver_response(msg);
|
|
}
|
|
|
|
spin_lock_irqsave(&intf->events_lock, flags);
|
|
intf->delivering_events = 0;
|
|
}
|
|
|
|
out:
|
|
spin_unlock_irqrestore(&intf->events_lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_set_gets_events);
|
|
|
|
static struct cmd_rcvr *find_cmd_rcvr(ipmi_smi_t intf,
|
|
unsigned char netfn,
|
|
unsigned char cmd,
|
|
unsigned char chan)
|
|
{
|
|
struct cmd_rcvr *rcvr;
|
|
|
|
list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
|
|
if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)
|
|
&& (rcvr->chans & (1 << chan)))
|
|
return rcvr;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static int is_cmd_rcvr_exclusive(ipmi_smi_t intf,
|
|
unsigned char netfn,
|
|
unsigned char cmd,
|
|
unsigned int chans)
|
|
{
|
|
struct cmd_rcvr *rcvr;
|
|
|
|
list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
|
|
if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)
|
|
&& (rcvr->chans & chans))
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
int ipmi_register_for_cmd(ipmi_user_t user,
|
|
unsigned char netfn,
|
|
unsigned char cmd,
|
|
unsigned int chans)
|
|
{
|
|
ipmi_smi_t intf = user->intf;
|
|
struct cmd_rcvr *rcvr;
|
|
int rv = 0;
|
|
|
|
|
|
rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL);
|
|
if (!rcvr)
|
|
return -ENOMEM;
|
|
rcvr->cmd = cmd;
|
|
rcvr->netfn = netfn;
|
|
rcvr->chans = chans;
|
|
rcvr->user = user;
|
|
|
|
mutex_lock(&intf->cmd_rcvrs_mutex);
|
|
/* Make sure the command/netfn is not already registered. */
|
|
if (!is_cmd_rcvr_exclusive(intf, netfn, cmd, chans)) {
|
|
rv = -EBUSY;
|
|
goto out_unlock;
|
|
}
|
|
|
|
list_add_rcu(&rcvr->link, &intf->cmd_rcvrs);
|
|
|
|
out_unlock:
|
|
mutex_unlock(&intf->cmd_rcvrs_mutex);
|
|
if (rv)
|
|
kfree(rcvr);
|
|
|
|
return rv;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_register_for_cmd);
|
|
|
|
int ipmi_unregister_for_cmd(ipmi_user_t user,
|
|
unsigned char netfn,
|
|
unsigned char cmd,
|
|
unsigned int chans)
|
|
{
|
|
ipmi_smi_t intf = user->intf;
|
|
struct cmd_rcvr *rcvr;
|
|
struct cmd_rcvr *rcvrs = NULL;
|
|
int i, rv = -ENOENT;
|
|
|
|
mutex_lock(&intf->cmd_rcvrs_mutex);
|
|
for (i = 0; i < IPMI_NUM_CHANNELS; i++) {
|
|
if (((1 << i) & chans) == 0)
|
|
continue;
|
|
rcvr = find_cmd_rcvr(intf, netfn, cmd, i);
|
|
if (rcvr == NULL)
|
|
continue;
|
|
if (rcvr->user == user) {
|
|
rv = 0;
|
|
rcvr->chans &= ~chans;
|
|
if (rcvr->chans == 0) {
|
|
list_del_rcu(&rcvr->link);
|
|
rcvr->next = rcvrs;
|
|
rcvrs = rcvr;
|
|
}
|
|
}
|
|
}
|
|
mutex_unlock(&intf->cmd_rcvrs_mutex);
|
|
synchronize_rcu();
|
|
while (rcvrs) {
|
|
rcvr = rcvrs;
|
|
rcvrs = rcvr->next;
|
|
kfree(rcvr);
|
|
}
|
|
return rv;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_unregister_for_cmd);
|
|
|
|
static unsigned char
|
|
ipmb_checksum(unsigned char *data, int size)
|
|
{
|
|
unsigned char csum = 0;
|
|
|
|
for (; size > 0; size--, data++)
|
|
csum += *data;
|
|
|
|
return -csum;
|
|
}
|
|
|
|
static inline void format_ipmb_msg(struct ipmi_smi_msg *smi_msg,
|
|
struct kernel_ipmi_msg *msg,
|
|
struct ipmi_ipmb_addr *ipmb_addr,
|
|
long msgid,
|
|
unsigned char ipmb_seq,
|
|
int broadcast,
|
|
unsigned char source_address,
|
|
unsigned char source_lun)
|
|
{
|
|
int i = broadcast;
|
|
|
|
/* Format the IPMB header data. */
|
|
smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
|
|
smi_msg->data[1] = IPMI_SEND_MSG_CMD;
|
|
smi_msg->data[2] = ipmb_addr->channel;
|
|
if (broadcast)
|
|
smi_msg->data[3] = 0;
|
|
smi_msg->data[i+3] = ipmb_addr->slave_addr;
|
|
smi_msg->data[i+4] = (msg->netfn << 2) | (ipmb_addr->lun & 0x3);
|
|
smi_msg->data[i+5] = ipmb_checksum(&(smi_msg->data[i+3]), 2);
|
|
smi_msg->data[i+6] = source_address;
|
|
smi_msg->data[i+7] = (ipmb_seq << 2) | source_lun;
|
|
smi_msg->data[i+8] = msg->cmd;
|
|
|
|
/* Now tack on the data to the message. */
|
|
if (msg->data_len > 0)
|
|
memcpy(&(smi_msg->data[i+9]), msg->data,
|
|
msg->data_len);
|
|
smi_msg->data_size = msg->data_len + 9;
|
|
|
|
/* Now calculate the checksum and tack it on. */
|
|
smi_msg->data[i+smi_msg->data_size]
|
|
= ipmb_checksum(&(smi_msg->data[i+6]),
|
|
smi_msg->data_size-6);
|
|
|
|
/*
|
|
* Add on the checksum size and the offset from the
|
|
* broadcast.
|
|
*/
|
|
smi_msg->data_size += 1 + i;
|
|
|
|
smi_msg->msgid = msgid;
|
|
}
|
|
|
|
static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg,
|
|
struct kernel_ipmi_msg *msg,
|
|
struct ipmi_lan_addr *lan_addr,
|
|
long msgid,
|
|
unsigned char ipmb_seq,
|
|
unsigned char source_lun)
|
|
{
|
|
/* Format the IPMB header data. */
|
|
smi_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
|
|
smi_msg->data[1] = IPMI_SEND_MSG_CMD;
|
|
smi_msg->data[2] = lan_addr->channel;
|
|
smi_msg->data[3] = lan_addr->session_handle;
|
|
smi_msg->data[4] = lan_addr->remote_SWID;
|
|
smi_msg->data[5] = (msg->netfn << 2) | (lan_addr->lun & 0x3);
|
|
smi_msg->data[6] = ipmb_checksum(&(smi_msg->data[4]), 2);
|
|
smi_msg->data[7] = lan_addr->local_SWID;
|
|
smi_msg->data[8] = (ipmb_seq << 2) | source_lun;
|
|
smi_msg->data[9] = msg->cmd;
|
|
|
|
/* Now tack on the data to the message. */
|
|
if (msg->data_len > 0)
|
|
memcpy(&(smi_msg->data[10]), msg->data,
|
|
msg->data_len);
|
|
smi_msg->data_size = msg->data_len + 10;
|
|
|
|
/* Now calculate the checksum and tack it on. */
|
|
smi_msg->data[smi_msg->data_size]
|
|
= ipmb_checksum(&(smi_msg->data[7]),
|
|
smi_msg->data_size-7);
|
|
|
|
/*
|
|
* Add on the checksum size and the offset from the
|
|
* broadcast.
|
|
*/
|
|
smi_msg->data_size += 1;
|
|
|
|
smi_msg->msgid = msgid;
|
|
}
|
|
|
|
/*
|
|
* Separate from ipmi_request so that the user does not have to be
|
|
* supplied in certain circumstances (mainly at panic time). If
|
|
* messages are supplied, they will be freed, even if an error
|
|
* occurs.
|
|
*/
|
|
static int i_ipmi_request(ipmi_user_t user,
|
|
ipmi_smi_t intf,
|
|
struct ipmi_addr *addr,
|
|
long msgid,
|
|
struct kernel_ipmi_msg *msg,
|
|
void *user_msg_data,
|
|
void *supplied_smi,
|
|
struct ipmi_recv_msg *supplied_recv,
|
|
int priority,
|
|
unsigned char source_address,
|
|
unsigned char source_lun,
|
|
int retries,
|
|
unsigned int retry_time_ms)
|
|
{
|
|
int rv = 0;
|
|
struct ipmi_smi_msg *smi_msg;
|
|
struct ipmi_recv_msg *recv_msg;
|
|
unsigned long flags;
|
|
struct ipmi_smi_handlers *handlers;
|
|
|
|
|
|
if (supplied_recv)
|
|
recv_msg = supplied_recv;
|
|
else {
|
|
recv_msg = ipmi_alloc_recv_msg();
|
|
if (recv_msg == NULL)
|
|
return -ENOMEM;
|
|
}
|
|
recv_msg->user_msg_data = user_msg_data;
|
|
|
|
if (supplied_smi)
|
|
smi_msg = (struct ipmi_smi_msg *) supplied_smi;
|
|
else {
|
|
smi_msg = ipmi_alloc_smi_msg();
|
|
if (smi_msg == NULL) {
|
|
ipmi_free_recv_msg(recv_msg);
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
rcu_read_lock();
|
|
handlers = intf->handlers;
|
|
if (!handlers) {
|
|
rv = -ENODEV;
|
|
goto out_err;
|
|
}
|
|
|
|
recv_msg->user = user;
|
|
if (user)
|
|
kref_get(&user->refcount);
|
|
recv_msg->msgid = msgid;
|
|
/*
|
|
* Store the message to send in the receive message so timeout
|
|
* responses can get the proper response data.
|
|
*/
|
|
recv_msg->msg = *msg;
|
|
|
|
if (addr->addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) {
|
|
struct ipmi_system_interface_addr *smi_addr;
|
|
|
|
if (msg->netfn & 1) {
|
|
/* Responses are not allowed to the SMI. */
|
|
rv = -EINVAL;
|
|
goto out_err;
|
|
}
|
|
|
|
smi_addr = (struct ipmi_system_interface_addr *) addr;
|
|
if (smi_addr->lun > 3) {
|
|
ipmi_inc_stat(intf, sent_invalid_commands);
|
|
rv = -EINVAL;
|
|
goto out_err;
|
|
}
|
|
|
|
memcpy(&recv_msg->addr, smi_addr, sizeof(*smi_addr));
|
|
|
|
if ((msg->netfn == IPMI_NETFN_APP_REQUEST)
|
|
&& ((msg->cmd == IPMI_SEND_MSG_CMD)
|
|
|| (msg->cmd == IPMI_GET_MSG_CMD)
|
|
|| (msg->cmd == IPMI_READ_EVENT_MSG_BUFFER_CMD))) {
|
|
/*
|
|
* We don't let the user do these, since we manage
|
|
* the sequence numbers.
|
|
*/
|
|
ipmi_inc_stat(intf, sent_invalid_commands);
|
|
rv = -EINVAL;
|
|
goto out_err;
|
|
}
|
|
|
|
if (((msg->netfn == IPMI_NETFN_APP_REQUEST)
|
|
&& ((msg->cmd == IPMI_COLD_RESET_CMD)
|
|
|| (msg->cmd == IPMI_WARM_RESET_CMD)))
|
|
|| (msg->netfn == IPMI_NETFN_FIRMWARE_REQUEST)) {
|
|
spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
|
|
intf->auto_maintenance_timeout
|
|
= IPMI_MAINTENANCE_MODE_TIMEOUT;
|
|
if (!intf->maintenance_mode
|
|
&& !intf->maintenance_mode_enable) {
|
|
intf->maintenance_mode_enable = 1;
|
|
maintenance_mode_update(intf);
|
|
}
|
|
spin_unlock_irqrestore(&intf->maintenance_mode_lock,
|
|
flags);
|
|
}
|
|
|
|
if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) {
|
|
ipmi_inc_stat(intf, sent_invalid_commands);
|
|
rv = -EMSGSIZE;
|
|
goto out_err;
|
|
}
|
|
|
|
smi_msg->data[0] = (msg->netfn << 2) | (smi_addr->lun & 0x3);
|
|
smi_msg->data[1] = msg->cmd;
|
|
smi_msg->msgid = msgid;
|
|
smi_msg->user_data = recv_msg;
|
|
if (msg->data_len > 0)
|
|
memcpy(&(smi_msg->data[2]), msg->data, msg->data_len);
|
|
smi_msg->data_size = msg->data_len + 2;
|
|
ipmi_inc_stat(intf, sent_local_commands);
|
|
} else if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE)
|
|
|| (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) {
|
|
struct ipmi_ipmb_addr *ipmb_addr;
|
|
unsigned char ipmb_seq;
|
|
long seqid;
|
|
int broadcast = 0;
|
|
|
|
if (addr->channel >= IPMI_MAX_CHANNELS) {
|
|
ipmi_inc_stat(intf, sent_invalid_commands);
|
|
rv = -EINVAL;
|
|
goto out_err;
|
|
}
|
|
|
|
if (intf->channels[addr->channel].medium
|
|
!= IPMI_CHANNEL_MEDIUM_IPMB) {
|
|
ipmi_inc_stat(intf, sent_invalid_commands);
|
|
rv = -EINVAL;
|
|
goto out_err;
|
|
}
|
|
|
|
if (retries < 0) {
|
|
if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)
|
|
retries = 0; /* Don't retry broadcasts. */
|
|
else
|
|
retries = 4;
|
|
}
|
|
if (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE) {
|
|
/*
|
|
* Broadcasts add a zero at the beginning of the
|
|
* message, but otherwise is the same as an IPMB
|
|
* address.
|
|
*/
|
|
addr->addr_type = IPMI_IPMB_ADDR_TYPE;
|
|
broadcast = 1;
|
|
}
|
|
|
|
|
|
/* Default to 1 second retries. */
|
|
if (retry_time_ms == 0)
|
|
retry_time_ms = 1000;
|
|
|
|
/*
|
|
* 9 for the header and 1 for the checksum, plus
|
|
* possibly one for the broadcast.
|
|
*/
|
|
if ((msg->data_len + 10 + broadcast) > IPMI_MAX_MSG_LENGTH) {
|
|
ipmi_inc_stat(intf, sent_invalid_commands);
|
|
rv = -EMSGSIZE;
|
|
goto out_err;
|
|
}
|
|
|
|
ipmb_addr = (struct ipmi_ipmb_addr *) addr;
|
|
if (ipmb_addr->lun > 3) {
|
|
ipmi_inc_stat(intf, sent_invalid_commands);
|
|
rv = -EINVAL;
|
|
goto out_err;
|
|
}
|
|
|
|
memcpy(&recv_msg->addr, ipmb_addr, sizeof(*ipmb_addr));
|
|
|
|
if (recv_msg->msg.netfn & 0x1) {
|
|
/*
|
|
* It's a response, so use the user's sequence
|
|
* from msgid.
|
|
*/
|
|
ipmi_inc_stat(intf, sent_ipmb_responses);
|
|
format_ipmb_msg(smi_msg, msg, ipmb_addr, msgid,
|
|
msgid, broadcast,
|
|
source_address, source_lun);
|
|
|
|
/*
|
|
* Save the receive message so we can use it
|
|
* to deliver the response.
|
|
*/
|
|
smi_msg->user_data = recv_msg;
|
|
} else {
|
|
/* It's a command, so get a sequence for it. */
|
|
|
|
spin_lock_irqsave(&(intf->seq_lock), flags);
|
|
|
|
ipmi_inc_stat(intf, sent_ipmb_commands);
|
|
|
|
/*
|
|
* Create a sequence number with a 1 second
|
|
* timeout and 4 retries.
|
|
*/
|
|
rv = intf_next_seq(intf,
|
|
recv_msg,
|
|
retry_time_ms,
|
|
retries,
|
|
broadcast,
|
|
&ipmb_seq,
|
|
&seqid);
|
|
if (rv) {
|
|
/*
|
|
* We have used up all the sequence numbers,
|
|
* probably, so abort.
|
|
*/
|
|
spin_unlock_irqrestore(&(intf->seq_lock),
|
|
flags);
|
|
goto out_err;
|
|
}
|
|
|
|
/*
|
|
* Store the sequence number in the message,
|
|
* so that when the send message response
|
|
* comes back we can start the timer.
|
|
*/
|
|
format_ipmb_msg(smi_msg, msg, ipmb_addr,
|
|
STORE_SEQ_IN_MSGID(ipmb_seq, seqid),
|
|
ipmb_seq, broadcast,
|
|
source_address, source_lun);
|
|
|
|
/*
|
|
* Copy the message into the recv message data, so we
|
|
* can retransmit it later if necessary.
|
|
*/
|
|
memcpy(recv_msg->msg_data, smi_msg->data,
|
|
smi_msg->data_size);
|
|
recv_msg->msg.data = recv_msg->msg_data;
|
|
recv_msg->msg.data_len = smi_msg->data_size;
|
|
|
|
/*
|
|
* We don't unlock until here, because we need
|
|
* to copy the completed message into the
|
|
* recv_msg before we release the lock.
|
|
* Otherwise, race conditions may bite us. I
|
|
* know that's pretty paranoid, but I prefer
|
|
* to be correct.
|
|
*/
|
|
spin_unlock_irqrestore(&(intf->seq_lock), flags);
|
|
}
|
|
} else if (addr->addr_type == IPMI_LAN_ADDR_TYPE) {
|
|
struct ipmi_lan_addr *lan_addr;
|
|
unsigned char ipmb_seq;
|
|
long seqid;
|
|
|
|
if (addr->channel >= IPMI_MAX_CHANNELS) {
|
|
ipmi_inc_stat(intf, sent_invalid_commands);
|
|
rv = -EINVAL;
|
|
goto out_err;
|
|
}
|
|
|
|
if ((intf->channels[addr->channel].medium
|
|
!= IPMI_CHANNEL_MEDIUM_8023LAN)
|
|
&& (intf->channels[addr->channel].medium
|
|
!= IPMI_CHANNEL_MEDIUM_ASYNC)) {
|
|
ipmi_inc_stat(intf, sent_invalid_commands);
|
|
rv = -EINVAL;
|
|
goto out_err;
|
|
}
|
|
|
|
retries = 4;
|
|
|
|
/* Default to 1 second retries. */
|
|
if (retry_time_ms == 0)
|
|
retry_time_ms = 1000;
|
|
|
|
/* 11 for the header and 1 for the checksum. */
|
|
if ((msg->data_len + 12) > IPMI_MAX_MSG_LENGTH) {
|
|
ipmi_inc_stat(intf, sent_invalid_commands);
|
|
rv = -EMSGSIZE;
|
|
goto out_err;
|
|
}
|
|
|
|
lan_addr = (struct ipmi_lan_addr *) addr;
|
|
if (lan_addr->lun > 3) {
|
|
ipmi_inc_stat(intf, sent_invalid_commands);
|
|
rv = -EINVAL;
|
|
goto out_err;
|
|
}
|
|
|
|
memcpy(&recv_msg->addr, lan_addr, sizeof(*lan_addr));
|
|
|
|
if (recv_msg->msg.netfn & 0x1) {
|
|
/*
|
|
* It's a response, so use the user's sequence
|
|
* from msgid.
|
|
*/
|
|
ipmi_inc_stat(intf, sent_lan_responses);
|
|
format_lan_msg(smi_msg, msg, lan_addr, msgid,
|
|
msgid, source_lun);
|
|
|
|
/*
|
|
* Save the receive message so we can use it
|
|
* to deliver the response.
|
|
*/
|
|
smi_msg->user_data = recv_msg;
|
|
} else {
|
|
/* It's a command, so get a sequence for it. */
|
|
|
|
spin_lock_irqsave(&(intf->seq_lock), flags);
|
|
|
|
ipmi_inc_stat(intf, sent_lan_commands);
|
|
|
|
/*
|
|
* Create a sequence number with a 1 second
|
|
* timeout and 4 retries.
|
|
*/
|
|
rv = intf_next_seq(intf,
|
|
recv_msg,
|
|
retry_time_ms,
|
|
retries,
|
|
0,
|
|
&ipmb_seq,
|
|
&seqid);
|
|
if (rv) {
|
|
/*
|
|
* We have used up all the sequence numbers,
|
|
* probably, so abort.
|
|
*/
|
|
spin_unlock_irqrestore(&(intf->seq_lock),
|
|
flags);
|
|
goto out_err;
|
|
}
|
|
|
|
/*
|
|
* Store the sequence number in the message,
|
|
* so that when the send message response
|
|
* comes back we can start the timer.
|
|
*/
|
|
format_lan_msg(smi_msg, msg, lan_addr,
|
|
STORE_SEQ_IN_MSGID(ipmb_seq, seqid),
|
|
ipmb_seq, source_lun);
|
|
|
|
/*
|
|
* Copy the message into the recv message data, so we
|
|
* can retransmit it later if necessary.
|
|
*/
|
|
memcpy(recv_msg->msg_data, smi_msg->data,
|
|
smi_msg->data_size);
|
|
recv_msg->msg.data = recv_msg->msg_data;
|
|
recv_msg->msg.data_len = smi_msg->data_size;
|
|
|
|
/*
|
|
* We don't unlock until here, because we need
|
|
* to copy the completed message into the
|
|
* recv_msg before we release the lock.
|
|
* Otherwise, race conditions may bite us. I
|
|
* know that's pretty paranoid, but I prefer
|
|
* to be correct.
|
|
*/
|
|
spin_unlock_irqrestore(&(intf->seq_lock), flags);
|
|
}
|
|
} else {
|
|
/* Unknown address type. */
|
|
ipmi_inc_stat(intf, sent_invalid_commands);
|
|
rv = -EINVAL;
|
|
goto out_err;
|
|
}
|
|
|
|
#ifdef DEBUG_MSGING
|
|
{
|
|
int m;
|
|
for (m = 0; m < smi_msg->data_size; m++)
|
|
printk(" %2.2x", smi_msg->data[m]);
|
|
printk("\n");
|
|
}
|
|
#endif
|
|
|
|
handlers->sender(intf->send_info, smi_msg, priority);
|
|
rcu_read_unlock();
|
|
|
|
return 0;
|
|
|
|
out_err:
|
|
rcu_read_unlock();
|
|
ipmi_free_smi_msg(smi_msg);
|
|
ipmi_free_recv_msg(recv_msg);
|
|
return rv;
|
|
}
|
|
|
|
static int check_addr(ipmi_smi_t intf,
|
|
struct ipmi_addr *addr,
|
|
unsigned char *saddr,
|
|
unsigned char *lun)
|
|
{
|
|
if (addr->channel >= IPMI_MAX_CHANNELS)
|
|
return -EINVAL;
|
|
*lun = intf->channels[addr->channel].lun;
|
|
*saddr = intf->channels[addr->channel].address;
|
|
return 0;
|
|
}
|
|
|
|
int ipmi_request_settime(ipmi_user_t user,
|
|
struct ipmi_addr *addr,
|
|
long msgid,
|
|
struct kernel_ipmi_msg *msg,
|
|
void *user_msg_data,
|
|
int priority,
|
|
int retries,
|
|
unsigned int retry_time_ms)
|
|
{
|
|
unsigned char saddr, lun;
|
|
int rv;
|
|
|
|
if (!user)
|
|
return -EINVAL;
|
|
rv = check_addr(user->intf, addr, &saddr, &lun);
|
|
if (rv)
|
|
return rv;
|
|
return i_ipmi_request(user,
|
|
user->intf,
|
|
addr,
|
|
msgid,
|
|
msg,
|
|
user_msg_data,
|
|
NULL, NULL,
|
|
priority,
|
|
saddr,
|
|
lun,
|
|
retries,
|
|
retry_time_ms);
|
|
}
|
|
EXPORT_SYMBOL(ipmi_request_settime);
|
|
|
|
int ipmi_request_supply_msgs(ipmi_user_t user,
|
|
struct ipmi_addr *addr,
|
|
long msgid,
|
|
struct kernel_ipmi_msg *msg,
|
|
void *user_msg_data,
|
|
void *supplied_smi,
|
|
struct ipmi_recv_msg *supplied_recv,
|
|
int priority)
|
|
{
|
|
unsigned char saddr, lun;
|
|
int rv;
|
|
|
|
if (!user)
|
|
return -EINVAL;
|
|
rv = check_addr(user->intf, addr, &saddr, &lun);
|
|
if (rv)
|
|
return rv;
|
|
return i_ipmi_request(user,
|
|
user->intf,
|
|
addr,
|
|
msgid,
|
|
msg,
|
|
user_msg_data,
|
|
supplied_smi,
|
|
supplied_recv,
|
|
priority,
|
|
saddr,
|
|
lun,
|
|
-1, 0);
|
|
}
|
|
EXPORT_SYMBOL(ipmi_request_supply_msgs);
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
static int ipmb_file_read_proc(char *page, char **start, off_t off,
|
|
int count, int *eof, void *data)
|
|
{
|
|
char *out = (char *) page;
|
|
ipmi_smi_t intf = data;
|
|
int i;
|
|
int rv = 0;
|
|
|
|
for (i = 0; i < IPMI_MAX_CHANNELS; i++)
|
|
rv += sprintf(out+rv, "%x ", intf->channels[i].address);
|
|
out[rv-1] = '\n'; /* Replace the final space with a newline */
|
|
out[rv] = '\0';
|
|
rv++;
|
|
return rv;
|
|
}
|
|
|
|
static int version_file_read_proc(char *page, char **start, off_t off,
|
|
int count, int *eof, void *data)
|
|
{
|
|
char *out = (char *) page;
|
|
ipmi_smi_t intf = data;
|
|
|
|
return sprintf(out, "%u.%u\n",
|
|
ipmi_version_major(&intf->bmc->id),
|
|
ipmi_version_minor(&intf->bmc->id));
|
|
}
|
|
|
|
static int stat_file_read_proc(char *page, char **start, off_t off,
|
|
int count, int *eof, void *data)
|
|
{
|
|
char *out = (char *) page;
|
|
ipmi_smi_t intf = data;
|
|
|
|
out += sprintf(out, "sent_invalid_commands: %u\n",
|
|
ipmi_get_stat(intf, sent_invalid_commands));
|
|
out += sprintf(out, "sent_local_commands: %u\n",
|
|
ipmi_get_stat(intf, sent_local_commands));
|
|
out += sprintf(out, "handled_local_responses: %u\n",
|
|
ipmi_get_stat(intf, handled_local_responses));
|
|
out += sprintf(out, "unhandled_local_responses: %u\n",
|
|
ipmi_get_stat(intf, unhandled_local_responses));
|
|
out += sprintf(out, "sent_ipmb_commands: %u\n",
|
|
ipmi_get_stat(intf, sent_ipmb_commands));
|
|
out += sprintf(out, "sent_ipmb_command_errs: %u\n",
|
|
ipmi_get_stat(intf, sent_ipmb_command_errs));
|
|
out += sprintf(out, "retransmitted_ipmb_commands: %u\n",
|
|
ipmi_get_stat(intf, retransmitted_ipmb_commands));
|
|
out += sprintf(out, "timed_out_ipmb_commands: %u\n",
|
|
ipmi_get_stat(intf, timed_out_ipmb_commands));
|
|
out += sprintf(out, "timed_out_ipmb_broadcasts: %u\n",
|
|
ipmi_get_stat(intf, timed_out_ipmb_broadcasts));
|
|
out += sprintf(out, "sent_ipmb_responses: %u\n",
|
|
ipmi_get_stat(intf, sent_ipmb_responses));
|
|
out += sprintf(out, "handled_ipmb_responses: %u\n",
|
|
ipmi_get_stat(intf, handled_ipmb_responses));
|
|
out += sprintf(out, "invalid_ipmb_responses: %u\n",
|
|
ipmi_get_stat(intf, invalid_ipmb_responses));
|
|
out += sprintf(out, "unhandled_ipmb_responses: %u\n",
|
|
ipmi_get_stat(intf, unhandled_ipmb_responses));
|
|
out += sprintf(out, "sent_lan_commands: %u\n",
|
|
ipmi_get_stat(intf, sent_lan_commands));
|
|
out += sprintf(out, "sent_lan_command_errs: %u\n",
|
|
ipmi_get_stat(intf, sent_lan_command_errs));
|
|
out += sprintf(out, "retransmitted_lan_commands: %u\n",
|
|
ipmi_get_stat(intf, retransmitted_lan_commands));
|
|
out += sprintf(out, "timed_out_lan_commands: %u\n",
|
|
ipmi_get_stat(intf, timed_out_lan_commands));
|
|
out += sprintf(out, "sent_lan_responses: %u\n",
|
|
ipmi_get_stat(intf, sent_lan_responses));
|
|
out += sprintf(out, "handled_lan_responses: %u\n",
|
|
ipmi_get_stat(intf, handled_lan_responses));
|
|
out += sprintf(out, "invalid_lan_responses: %u\n",
|
|
ipmi_get_stat(intf, invalid_lan_responses));
|
|
out += sprintf(out, "unhandled_lan_responses: %u\n",
|
|
ipmi_get_stat(intf, unhandled_lan_responses));
|
|
out += sprintf(out, "handled_commands: %u\n",
|
|
ipmi_get_stat(intf, handled_commands));
|
|
out += sprintf(out, "invalid_commands: %u\n",
|
|
ipmi_get_stat(intf, invalid_commands));
|
|
out += sprintf(out, "unhandled_commands: %u\n",
|
|
ipmi_get_stat(intf, unhandled_commands));
|
|
out += sprintf(out, "invalid_events: %u\n",
|
|
ipmi_get_stat(intf, invalid_events));
|
|
out += sprintf(out, "events: %u\n",
|
|
ipmi_get_stat(intf, events));
|
|
|
|
return (out - ((char *) page));
|
|
}
|
|
#endif /* CONFIG_PROC_FS */
|
|
|
|
int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name,
|
|
read_proc_t *read_proc,
|
|
void *data, struct module *owner)
|
|
{
|
|
int rv = 0;
|
|
#ifdef CONFIG_PROC_FS
|
|
struct proc_dir_entry *file;
|
|
struct ipmi_proc_entry *entry;
|
|
|
|
/* Create a list element. */
|
|
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
|
|
if (!entry)
|
|
return -ENOMEM;
|
|
entry->name = kmalloc(strlen(name)+1, GFP_KERNEL);
|
|
if (!entry->name) {
|
|
kfree(entry);
|
|
return -ENOMEM;
|
|
}
|
|
strcpy(entry->name, name);
|
|
|
|
file = create_proc_entry(name, 0, smi->proc_dir);
|
|
if (!file) {
|
|
kfree(entry->name);
|
|
kfree(entry);
|
|
rv = -ENOMEM;
|
|
} else {
|
|
file->data = data;
|
|
file->read_proc = read_proc;
|
|
file->owner = owner;
|
|
|
|
mutex_lock(&smi->proc_entry_lock);
|
|
/* Stick it on the list. */
|
|
entry->next = smi->proc_entries;
|
|
smi->proc_entries = entry;
|
|
mutex_unlock(&smi->proc_entry_lock);
|
|
}
|
|
#endif /* CONFIG_PROC_FS */
|
|
|
|
return rv;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_smi_add_proc_entry);
|
|
|
|
static int add_proc_entries(ipmi_smi_t smi, int num)
|
|
{
|
|
int rv = 0;
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
sprintf(smi->proc_dir_name, "%d", num);
|
|
smi->proc_dir = proc_mkdir(smi->proc_dir_name, proc_ipmi_root);
|
|
if (!smi->proc_dir)
|
|
rv = -ENOMEM;
|
|
else
|
|
smi->proc_dir->owner = THIS_MODULE;
|
|
|
|
if (rv == 0)
|
|
rv = ipmi_smi_add_proc_entry(smi, "stats",
|
|
stat_file_read_proc,
|
|
smi, THIS_MODULE);
|
|
|
|
if (rv == 0)
|
|
rv = ipmi_smi_add_proc_entry(smi, "ipmb",
|
|
ipmb_file_read_proc,
|
|
smi, THIS_MODULE);
|
|
|
|
if (rv == 0)
|
|
rv = ipmi_smi_add_proc_entry(smi, "version",
|
|
version_file_read_proc,
|
|
smi, THIS_MODULE);
|
|
#endif /* CONFIG_PROC_FS */
|
|
|
|
return rv;
|
|
}
|
|
|
|
static void remove_proc_entries(ipmi_smi_t smi)
|
|
{
|
|
#ifdef CONFIG_PROC_FS
|
|
struct ipmi_proc_entry *entry;
|
|
|
|
mutex_lock(&smi->proc_entry_lock);
|
|
while (smi->proc_entries) {
|
|
entry = smi->proc_entries;
|
|
smi->proc_entries = entry->next;
|
|
|
|
remove_proc_entry(entry->name, smi->proc_dir);
|
|
kfree(entry->name);
|
|
kfree(entry);
|
|
}
|
|
mutex_unlock(&smi->proc_entry_lock);
|
|
remove_proc_entry(smi->proc_dir_name, proc_ipmi_root);
|
|
#endif /* CONFIG_PROC_FS */
|
|
}
|
|
|
|
static int __find_bmc_guid(struct device *dev, void *data)
|
|
{
|
|
unsigned char *id = data;
|
|
struct bmc_device *bmc = dev_get_drvdata(dev);
|
|
return memcmp(bmc->guid, id, 16) == 0;
|
|
}
|
|
|
|
static struct bmc_device *ipmi_find_bmc_guid(struct device_driver *drv,
|
|
unsigned char *guid)
|
|
{
|
|
struct device *dev;
|
|
|
|
dev = driver_find_device(drv, NULL, guid, __find_bmc_guid);
|
|
if (dev)
|
|
return dev_get_drvdata(dev);
|
|
else
|
|
return NULL;
|
|
}
|
|
|
|
struct prod_dev_id {
|
|
unsigned int product_id;
|
|
unsigned char device_id;
|
|
};
|
|
|
|
static int __find_bmc_prod_dev_id(struct device *dev, void *data)
|
|
{
|
|
struct prod_dev_id *id = data;
|
|
struct bmc_device *bmc = dev_get_drvdata(dev);
|
|
|
|
return (bmc->id.product_id == id->product_id
|
|
&& bmc->id.device_id == id->device_id);
|
|
}
|
|
|
|
static struct bmc_device *ipmi_find_bmc_prod_dev_id(
|
|
struct device_driver *drv,
|
|
unsigned int product_id, unsigned char device_id)
|
|
{
|
|
struct prod_dev_id id = {
|
|
.product_id = product_id,
|
|
.device_id = device_id,
|
|
};
|
|
struct device *dev;
|
|
|
|
dev = driver_find_device(drv, NULL, &id, __find_bmc_prod_dev_id);
|
|
if (dev)
|
|
return dev_get_drvdata(dev);
|
|
else
|
|
return NULL;
|
|
}
|
|
|
|
static ssize_t device_id_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct bmc_device *bmc = dev_get_drvdata(dev);
|
|
|
|
return snprintf(buf, 10, "%u\n", bmc->id.device_id);
|
|
}
|
|
|
|
static ssize_t provides_dev_sdrs_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct bmc_device *bmc = dev_get_drvdata(dev);
|
|
|
|
return snprintf(buf, 10, "%u\n",
|
|
(bmc->id.device_revision & 0x80) >> 7);
|
|
}
|
|
|
|
static ssize_t revision_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct bmc_device *bmc = dev_get_drvdata(dev);
|
|
|
|
return snprintf(buf, 20, "%u\n",
|
|
bmc->id.device_revision & 0x0F);
|
|
}
|
|
|
|
static ssize_t firmware_rev_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct bmc_device *bmc = dev_get_drvdata(dev);
|
|
|
|
return snprintf(buf, 20, "%u.%x\n", bmc->id.firmware_revision_1,
|
|
bmc->id.firmware_revision_2);
|
|
}
|
|
|
|
static ssize_t ipmi_version_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct bmc_device *bmc = dev_get_drvdata(dev);
|
|
|
|
return snprintf(buf, 20, "%u.%u\n",
|
|
ipmi_version_major(&bmc->id),
|
|
ipmi_version_minor(&bmc->id));
|
|
}
|
|
|
|
static ssize_t add_dev_support_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct bmc_device *bmc = dev_get_drvdata(dev);
|
|
|
|
return snprintf(buf, 10, "0x%02x\n",
|
|
bmc->id.additional_device_support);
|
|
}
|
|
|
|
static ssize_t manufacturer_id_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct bmc_device *bmc = dev_get_drvdata(dev);
|
|
|
|
return snprintf(buf, 20, "0x%6.6x\n", bmc->id.manufacturer_id);
|
|
}
|
|
|
|
static ssize_t product_id_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct bmc_device *bmc = dev_get_drvdata(dev);
|
|
|
|
return snprintf(buf, 10, "0x%4.4x\n", bmc->id.product_id);
|
|
}
|
|
|
|
static ssize_t aux_firmware_rev_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct bmc_device *bmc = dev_get_drvdata(dev);
|
|
|
|
return snprintf(buf, 21, "0x%02x 0x%02x 0x%02x 0x%02x\n",
|
|
bmc->id.aux_firmware_revision[3],
|
|
bmc->id.aux_firmware_revision[2],
|
|
bmc->id.aux_firmware_revision[1],
|
|
bmc->id.aux_firmware_revision[0]);
|
|
}
|
|
|
|
static ssize_t guid_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct bmc_device *bmc = dev_get_drvdata(dev);
|
|
|
|
return snprintf(buf, 100, "%Lx%Lx\n",
|
|
(long long) bmc->guid[0],
|
|
(long long) bmc->guid[8]);
|
|
}
|
|
|
|
static void remove_files(struct bmc_device *bmc)
|
|
{
|
|
if (!bmc->dev)
|
|
return;
|
|
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->device_id_attr);
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->provides_dev_sdrs_attr);
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->revision_attr);
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->firmware_rev_attr);
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->version_attr);
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->add_dev_support_attr);
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->manufacturer_id_attr);
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->product_id_attr);
|
|
|
|
if (bmc->id.aux_firmware_revision_set)
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->aux_firmware_rev_attr);
|
|
if (bmc->guid_set)
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->guid_attr);
|
|
}
|
|
|
|
static void
|
|
cleanup_bmc_device(struct kref *ref)
|
|
{
|
|
struct bmc_device *bmc;
|
|
|
|
bmc = container_of(ref, struct bmc_device, refcount);
|
|
|
|
remove_files(bmc);
|
|
platform_device_unregister(bmc->dev);
|
|
kfree(bmc);
|
|
}
|
|
|
|
static void ipmi_bmc_unregister(ipmi_smi_t intf)
|
|
{
|
|
struct bmc_device *bmc = intf->bmc;
|
|
|
|
if (intf->sysfs_name) {
|
|
sysfs_remove_link(&intf->si_dev->kobj, intf->sysfs_name);
|
|
kfree(intf->sysfs_name);
|
|
intf->sysfs_name = NULL;
|
|
}
|
|
if (intf->my_dev_name) {
|
|
sysfs_remove_link(&bmc->dev->dev.kobj, intf->my_dev_name);
|
|
kfree(intf->my_dev_name);
|
|
intf->my_dev_name = NULL;
|
|
}
|
|
|
|
mutex_lock(&ipmidriver_mutex);
|
|
kref_put(&bmc->refcount, cleanup_bmc_device);
|
|
intf->bmc = NULL;
|
|
mutex_unlock(&ipmidriver_mutex);
|
|
}
|
|
|
|
static int create_files(struct bmc_device *bmc)
|
|
{
|
|
int err;
|
|
|
|
bmc->device_id_attr.attr.name = "device_id";
|
|
bmc->device_id_attr.attr.mode = S_IRUGO;
|
|
bmc->device_id_attr.show = device_id_show;
|
|
|
|
bmc->provides_dev_sdrs_attr.attr.name = "provides_device_sdrs";
|
|
bmc->provides_dev_sdrs_attr.attr.mode = S_IRUGO;
|
|
bmc->provides_dev_sdrs_attr.show = provides_dev_sdrs_show;
|
|
|
|
bmc->revision_attr.attr.name = "revision";
|
|
bmc->revision_attr.attr.mode = S_IRUGO;
|
|
bmc->revision_attr.show = revision_show;
|
|
|
|
bmc->firmware_rev_attr.attr.name = "firmware_revision";
|
|
bmc->firmware_rev_attr.attr.mode = S_IRUGO;
|
|
bmc->firmware_rev_attr.show = firmware_rev_show;
|
|
|
|
bmc->version_attr.attr.name = "ipmi_version";
|
|
bmc->version_attr.attr.mode = S_IRUGO;
|
|
bmc->version_attr.show = ipmi_version_show;
|
|
|
|
bmc->add_dev_support_attr.attr.name = "additional_device_support";
|
|
bmc->add_dev_support_attr.attr.mode = S_IRUGO;
|
|
bmc->add_dev_support_attr.show = add_dev_support_show;
|
|
|
|
bmc->manufacturer_id_attr.attr.name = "manufacturer_id";
|
|
bmc->manufacturer_id_attr.attr.mode = S_IRUGO;
|
|
bmc->manufacturer_id_attr.show = manufacturer_id_show;
|
|
|
|
bmc->product_id_attr.attr.name = "product_id";
|
|
bmc->product_id_attr.attr.mode = S_IRUGO;
|
|
bmc->product_id_attr.show = product_id_show;
|
|
|
|
bmc->guid_attr.attr.name = "guid";
|
|
bmc->guid_attr.attr.mode = S_IRUGO;
|
|
bmc->guid_attr.show = guid_show;
|
|
|
|
bmc->aux_firmware_rev_attr.attr.name = "aux_firmware_revision";
|
|
bmc->aux_firmware_rev_attr.attr.mode = S_IRUGO;
|
|
bmc->aux_firmware_rev_attr.show = aux_firmware_rev_show;
|
|
|
|
err = device_create_file(&bmc->dev->dev,
|
|
&bmc->device_id_attr);
|
|
if (err)
|
|
goto out;
|
|
err = device_create_file(&bmc->dev->dev,
|
|
&bmc->provides_dev_sdrs_attr);
|
|
if (err)
|
|
goto out_devid;
|
|
err = device_create_file(&bmc->dev->dev,
|
|
&bmc->revision_attr);
|
|
if (err)
|
|
goto out_sdrs;
|
|
err = device_create_file(&bmc->dev->dev,
|
|
&bmc->firmware_rev_attr);
|
|
if (err)
|
|
goto out_rev;
|
|
err = device_create_file(&bmc->dev->dev,
|
|
&bmc->version_attr);
|
|
if (err)
|
|
goto out_firm;
|
|
err = device_create_file(&bmc->dev->dev,
|
|
&bmc->add_dev_support_attr);
|
|
if (err)
|
|
goto out_version;
|
|
err = device_create_file(&bmc->dev->dev,
|
|
&bmc->manufacturer_id_attr);
|
|
if (err)
|
|
goto out_add_dev;
|
|
err = device_create_file(&bmc->dev->dev,
|
|
&bmc->product_id_attr);
|
|
if (err)
|
|
goto out_manu;
|
|
if (bmc->id.aux_firmware_revision_set) {
|
|
err = device_create_file(&bmc->dev->dev,
|
|
&bmc->aux_firmware_rev_attr);
|
|
if (err)
|
|
goto out_prod_id;
|
|
}
|
|
if (bmc->guid_set) {
|
|
err = device_create_file(&bmc->dev->dev,
|
|
&bmc->guid_attr);
|
|
if (err)
|
|
goto out_aux_firm;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_aux_firm:
|
|
if (bmc->id.aux_firmware_revision_set)
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->aux_firmware_rev_attr);
|
|
out_prod_id:
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->product_id_attr);
|
|
out_manu:
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->manufacturer_id_attr);
|
|
out_add_dev:
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->add_dev_support_attr);
|
|
out_version:
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->version_attr);
|
|
out_firm:
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->firmware_rev_attr);
|
|
out_rev:
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->revision_attr);
|
|
out_sdrs:
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->provides_dev_sdrs_attr);
|
|
out_devid:
|
|
device_remove_file(&bmc->dev->dev,
|
|
&bmc->device_id_attr);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int ipmi_bmc_register(ipmi_smi_t intf, int ifnum,
|
|
const char *sysfs_name)
|
|
{
|
|
int rv;
|
|
struct bmc_device *bmc = intf->bmc;
|
|
struct bmc_device *old_bmc;
|
|
int size;
|
|
char dummy[1];
|
|
|
|
mutex_lock(&ipmidriver_mutex);
|
|
|
|
/*
|
|
* Try to find if there is an bmc_device struct
|
|
* representing the interfaced BMC already
|
|
*/
|
|
if (bmc->guid_set)
|
|
old_bmc = ipmi_find_bmc_guid(&ipmidriver, bmc->guid);
|
|
else
|
|
old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver,
|
|
bmc->id.product_id,
|
|
bmc->id.device_id);
|
|
|
|
/*
|
|
* If there is already an bmc_device, free the new one,
|
|
* otherwise register the new BMC device
|
|
*/
|
|
if (old_bmc) {
|
|
kfree(bmc);
|
|
intf->bmc = old_bmc;
|
|
bmc = old_bmc;
|
|
|
|
kref_get(&bmc->refcount);
|
|
mutex_unlock(&ipmidriver_mutex);
|
|
|
|
printk(KERN_INFO
|
|
"ipmi: interfacing existing BMC (man_id: 0x%6.6x,"
|
|
" prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
|
|
bmc->id.manufacturer_id,
|
|
bmc->id.product_id,
|
|
bmc->id.device_id);
|
|
} else {
|
|
char name[14];
|
|
unsigned char orig_dev_id = bmc->id.device_id;
|
|
int warn_printed = 0;
|
|
|
|
snprintf(name, sizeof(name),
|
|
"ipmi_bmc.%4.4x", bmc->id.product_id);
|
|
|
|
while (ipmi_find_bmc_prod_dev_id(&ipmidriver,
|
|
bmc->id.product_id,
|
|
bmc->id.device_id)) {
|
|
if (!warn_printed) {
|
|
printk(KERN_WARNING PFX
|
|
"This machine has two different BMCs"
|
|
" with the same product id and device"
|
|
" id. This is an error in the"
|
|
" firmware, but incrementing the"
|
|
" device id to work around the problem."
|
|
" Prod ID = 0x%x, Dev ID = 0x%x\n",
|
|
bmc->id.product_id, bmc->id.device_id);
|
|
warn_printed = 1;
|
|
}
|
|
bmc->id.device_id++; /* Wraps at 255 */
|
|
if (bmc->id.device_id == orig_dev_id) {
|
|
printk(KERN_ERR PFX
|
|
"Out of device ids!\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
bmc->dev = platform_device_alloc(name, bmc->id.device_id);
|
|
if (!bmc->dev) {
|
|
mutex_unlock(&ipmidriver_mutex);
|
|
printk(KERN_ERR
|
|
"ipmi_msghandler:"
|
|
" Unable to allocate platform device\n");
|
|
return -ENOMEM;
|
|
}
|
|
bmc->dev->dev.driver = &ipmidriver;
|
|
dev_set_drvdata(&bmc->dev->dev, bmc);
|
|
kref_init(&bmc->refcount);
|
|
|
|
rv = platform_device_add(bmc->dev);
|
|
mutex_unlock(&ipmidriver_mutex);
|
|
if (rv) {
|
|
platform_device_put(bmc->dev);
|
|
bmc->dev = NULL;
|
|
printk(KERN_ERR
|
|
"ipmi_msghandler:"
|
|
" Unable to register bmc device: %d\n",
|
|
rv);
|
|
/*
|
|
* Don't go to out_err, you can only do that if
|
|
* the device is registered already.
|
|
*/
|
|
return rv;
|
|
}
|
|
|
|
rv = create_files(bmc);
|
|
if (rv) {
|
|
mutex_lock(&ipmidriver_mutex);
|
|
platform_device_unregister(bmc->dev);
|
|
mutex_unlock(&ipmidriver_mutex);
|
|
|
|
return rv;
|
|
}
|
|
|
|
printk(KERN_INFO
|
|
"ipmi: Found new BMC (man_id: 0x%6.6x, "
|
|
" prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
|
|
bmc->id.manufacturer_id,
|
|
bmc->id.product_id,
|
|
bmc->id.device_id);
|
|
}
|
|
|
|
/*
|
|
* create symlink from system interface device to bmc device
|
|
* and back.
|
|
*/
|
|
intf->sysfs_name = kstrdup(sysfs_name, GFP_KERNEL);
|
|
if (!intf->sysfs_name) {
|
|
rv = -ENOMEM;
|
|
printk(KERN_ERR
|
|
"ipmi_msghandler: allocate link to BMC: %d\n",
|
|
rv);
|
|
goto out_err;
|
|
}
|
|
|
|
rv = sysfs_create_link(&intf->si_dev->kobj,
|
|
&bmc->dev->dev.kobj, intf->sysfs_name);
|
|
if (rv) {
|
|
kfree(intf->sysfs_name);
|
|
intf->sysfs_name = NULL;
|
|
printk(KERN_ERR
|
|
"ipmi_msghandler: Unable to create bmc symlink: %d\n",
|
|
rv);
|
|
goto out_err;
|
|
}
|
|
|
|
size = snprintf(dummy, 0, "ipmi%d", ifnum);
|
|
intf->my_dev_name = kmalloc(size+1, GFP_KERNEL);
|
|
if (!intf->my_dev_name) {
|
|
kfree(intf->sysfs_name);
|
|
intf->sysfs_name = NULL;
|
|
rv = -ENOMEM;
|
|
printk(KERN_ERR
|
|
"ipmi_msghandler: allocate link from BMC: %d\n",
|
|
rv);
|
|
goto out_err;
|
|
}
|
|
snprintf(intf->my_dev_name, size+1, "ipmi%d", ifnum);
|
|
|
|
rv = sysfs_create_link(&bmc->dev->dev.kobj, &intf->si_dev->kobj,
|
|
intf->my_dev_name);
|
|
if (rv) {
|
|
kfree(intf->sysfs_name);
|
|
intf->sysfs_name = NULL;
|
|
kfree(intf->my_dev_name);
|
|
intf->my_dev_name = NULL;
|
|
printk(KERN_ERR
|
|
"ipmi_msghandler:"
|
|
" Unable to create symlink to bmc: %d\n",
|
|
rv);
|
|
goto out_err;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_err:
|
|
ipmi_bmc_unregister(intf);
|
|
return rv;
|
|
}
|
|
|
|
static int
|
|
send_guid_cmd(ipmi_smi_t intf, int chan)
|
|
{
|
|
struct kernel_ipmi_msg msg;
|
|
struct ipmi_system_interface_addr si;
|
|
|
|
si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
|
|
si.channel = IPMI_BMC_CHANNEL;
|
|
si.lun = 0;
|
|
|
|
msg.netfn = IPMI_NETFN_APP_REQUEST;
|
|
msg.cmd = IPMI_GET_DEVICE_GUID_CMD;
|
|
msg.data = NULL;
|
|
msg.data_len = 0;
|
|
return i_ipmi_request(NULL,
|
|
intf,
|
|
(struct ipmi_addr *) &si,
|
|
0,
|
|
&msg,
|
|
intf,
|
|
NULL,
|
|
NULL,
|
|
0,
|
|
intf->channels[0].address,
|
|
intf->channels[0].lun,
|
|
-1, 0);
|
|
}
|
|
|
|
static void
|
|
guid_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
|
|
{
|
|
if ((msg->addr.addr_type != IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
|
|
|| (msg->msg.netfn != IPMI_NETFN_APP_RESPONSE)
|
|
|| (msg->msg.cmd != IPMI_GET_DEVICE_GUID_CMD))
|
|
/* Not for me */
|
|
return;
|
|
|
|
if (msg->msg.data[0] != 0) {
|
|
/* Error from getting the GUID, the BMC doesn't have one. */
|
|
intf->bmc->guid_set = 0;
|
|
goto out;
|
|
}
|
|
|
|
if (msg->msg.data_len < 17) {
|
|
intf->bmc->guid_set = 0;
|
|
printk(KERN_WARNING PFX
|
|
"guid_handler: The GUID response from the BMC was too"
|
|
" short, it was %d but should have been 17. Assuming"
|
|
" GUID is not available.\n",
|
|
msg->msg.data_len);
|
|
goto out;
|
|
}
|
|
|
|
memcpy(intf->bmc->guid, msg->msg.data, 16);
|
|
intf->bmc->guid_set = 1;
|
|
out:
|
|
wake_up(&intf->waitq);
|
|
}
|
|
|
|
static void
|
|
get_guid(ipmi_smi_t intf)
|
|
{
|
|
int rv;
|
|
|
|
intf->bmc->guid_set = 0x2;
|
|
intf->null_user_handler = guid_handler;
|
|
rv = send_guid_cmd(intf, 0);
|
|
if (rv)
|
|
/* Send failed, no GUID available. */
|
|
intf->bmc->guid_set = 0;
|
|
wait_event(intf->waitq, intf->bmc->guid_set != 2);
|
|
intf->null_user_handler = NULL;
|
|
}
|
|
|
|
static int
|
|
send_channel_info_cmd(ipmi_smi_t intf, int chan)
|
|
{
|
|
struct kernel_ipmi_msg msg;
|
|
unsigned char data[1];
|
|
struct ipmi_system_interface_addr si;
|
|
|
|
si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
|
|
si.channel = IPMI_BMC_CHANNEL;
|
|
si.lun = 0;
|
|
|
|
msg.netfn = IPMI_NETFN_APP_REQUEST;
|
|
msg.cmd = IPMI_GET_CHANNEL_INFO_CMD;
|
|
msg.data = data;
|
|
msg.data_len = 1;
|
|
data[0] = chan;
|
|
return i_ipmi_request(NULL,
|
|
intf,
|
|
(struct ipmi_addr *) &si,
|
|
0,
|
|
&msg,
|
|
intf,
|
|
NULL,
|
|
NULL,
|
|
0,
|
|
intf->channels[0].address,
|
|
intf->channels[0].lun,
|
|
-1, 0);
|
|
}
|
|
|
|
static void
|
|
channel_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
|
|
{
|
|
int rv = 0;
|
|
int chan;
|
|
|
|
if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
|
|
&& (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE)
|
|
&& (msg->msg.cmd == IPMI_GET_CHANNEL_INFO_CMD)) {
|
|
/* It's the one we want */
|
|
if (msg->msg.data[0] != 0) {
|
|
/* Got an error from the channel, just go on. */
|
|
|
|
if (msg->msg.data[0] == IPMI_INVALID_COMMAND_ERR) {
|
|
/*
|
|
* If the MC does not support this
|
|
* command, that is legal. We just
|
|
* assume it has one IPMB at channel
|
|
* zero.
|
|
*/
|
|
intf->channels[0].medium
|
|
= IPMI_CHANNEL_MEDIUM_IPMB;
|
|
intf->channels[0].protocol
|
|
= IPMI_CHANNEL_PROTOCOL_IPMB;
|
|
rv = -ENOSYS;
|
|
|
|
intf->curr_channel = IPMI_MAX_CHANNELS;
|
|
wake_up(&intf->waitq);
|
|
goto out;
|
|
}
|
|
goto next_channel;
|
|
}
|
|
if (msg->msg.data_len < 4) {
|
|
/* Message not big enough, just go on. */
|
|
goto next_channel;
|
|
}
|
|
chan = intf->curr_channel;
|
|
intf->channels[chan].medium = msg->msg.data[2] & 0x7f;
|
|
intf->channels[chan].protocol = msg->msg.data[3] & 0x1f;
|
|
|
|
next_channel:
|
|
intf->curr_channel++;
|
|
if (intf->curr_channel >= IPMI_MAX_CHANNELS)
|
|
wake_up(&intf->waitq);
|
|
else
|
|
rv = send_channel_info_cmd(intf, intf->curr_channel);
|
|
|
|
if (rv) {
|
|
/* Got an error somehow, just give up. */
|
|
intf->curr_channel = IPMI_MAX_CHANNELS;
|
|
wake_up(&intf->waitq);
|
|
|
|
printk(KERN_WARNING PFX
|
|
"Error sending channel information: %d\n",
|
|
rv);
|
|
}
|
|
}
|
|
out:
|
|
return;
|
|
}
|
|
|
|
void ipmi_poll_interface(ipmi_user_t user)
|
|
{
|
|
ipmi_smi_t intf = user->intf;
|
|
|
|
if (intf->handlers->poll)
|
|
intf->handlers->poll(intf->send_info);
|
|
}
|
|
EXPORT_SYMBOL(ipmi_poll_interface);
|
|
|
|
int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
|
|
void *send_info,
|
|
struct ipmi_device_id *device_id,
|
|
struct device *si_dev,
|
|
const char *sysfs_name,
|
|
unsigned char slave_addr)
|
|
{
|
|
int i, j;
|
|
int rv;
|
|
ipmi_smi_t intf;
|
|
ipmi_smi_t tintf;
|
|
struct list_head *link;
|
|
|
|
/*
|
|
* Make sure the driver is actually initialized, this handles
|
|
* problems with initialization order.
|
|
*/
|
|
if (!initialized) {
|
|
rv = ipmi_init_msghandler();
|
|
if (rv)
|
|
return rv;
|
|
/*
|
|
* The init code doesn't return an error if it was turned
|
|
* off, but it won't initialize. Check that.
|
|
*/
|
|
if (!initialized)
|
|
return -ENODEV;
|
|
}
|
|
|
|
intf = kzalloc(sizeof(*intf), GFP_KERNEL);
|
|
if (!intf)
|
|
return -ENOMEM;
|
|
|
|
intf->ipmi_version_major = ipmi_version_major(device_id);
|
|
intf->ipmi_version_minor = ipmi_version_minor(device_id);
|
|
|
|
intf->bmc = kzalloc(sizeof(*intf->bmc), GFP_KERNEL);
|
|
if (!intf->bmc) {
|
|
kfree(intf);
|
|
return -ENOMEM;
|
|
}
|
|
intf->intf_num = -1; /* Mark it invalid for now. */
|
|
kref_init(&intf->refcount);
|
|
intf->bmc->id = *device_id;
|
|
intf->si_dev = si_dev;
|
|
for (j = 0; j < IPMI_MAX_CHANNELS; j++) {
|
|
intf->channels[j].address = IPMI_BMC_SLAVE_ADDR;
|
|
intf->channels[j].lun = 2;
|
|
}
|
|
if (slave_addr != 0)
|
|
intf->channels[0].address = slave_addr;
|
|
INIT_LIST_HEAD(&intf->users);
|
|
intf->handlers = handlers;
|
|
intf->send_info = send_info;
|
|
spin_lock_init(&intf->seq_lock);
|
|
for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) {
|
|
intf->seq_table[j].inuse = 0;
|
|
intf->seq_table[j].seqid = 0;
|
|
}
|
|
intf->curr_seq = 0;
|
|
#ifdef CONFIG_PROC_FS
|
|
mutex_init(&intf->proc_entry_lock);
|
|
#endif
|
|
spin_lock_init(&intf->waiting_msgs_lock);
|
|
INIT_LIST_HEAD(&intf->waiting_msgs);
|
|
spin_lock_init(&intf->events_lock);
|
|
INIT_LIST_HEAD(&intf->waiting_events);
|
|
intf->waiting_events_count = 0;
|
|
mutex_init(&intf->cmd_rcvrs_mutex);
|
|
spin_lock_init(&intf->maintenance_mode_lock);
|
|
INIT_LIST_HEAD(&intf->cmd_rcvrs);
|
|
init_waitqueue_head(&intf->waitq);
|
|
for (i = 0; i < IPMI_NUM_STATS; i++)
|
|
atomic_set(&intf->stats[i], 0);
|
|
|
|
intf->proc_dir = NULL;
|
|
|
|
mutex_lock(&smi_watchers_mutex);
|
|
mutex_lock(&ipmi_interfaces_mutex);
|
|
/* Look for a hole in the numbers. */
|
|
i = 0;
|
|
link = &ipmi_interfaces;
|
|
list_for_each_entry_rcu(tintf, &ipmi_interfaces, link) {
|
|
if (tintf->intf_num != i) {
|
|
link = &tintf->link;
|
|
break;
|
|
}
|
|
i++;
|
|
}
|
|
/* Add the new interface in numeric order. */
|
|
if (i == 0)
|
|
list_add_rcu(&intf->link, &ipmi_interfaces);
|
|
else
|
|
list_add_tail_rcu(&intf->link, link);
|
|
|
|
rv = handlers->start_processing(send_info, intf);
|
|
if (rv)
|
|
goto out;
|
|
|
|
get_guid(intf);
|
|
|
|
if ((intf->ipmi_version_major > 1)
|
|
|| ((intf->ipmi_version_major == 1)
|
|
&& (intf->ipmi_version_minor >= 5))) {
|
|
/*
|
|
* Start scanning the channels to see what is
|
|
* available.
|
|
*/
|
|
intf->null_user_handler = channel_handler;
|
|
intf->curr_channel = 0;
|
|
rv = send_channel_info_cmd(intf, 0);
|
|
if (rv)
|
|
goto out;
|
|
|
|
/* Wait for the channel info to be read. */
|
|
wait_event(intf->waitq,
|
|
intf->curr_channel >= IPMI_MAX_CHANNELS);
|
|
intf->null_user_handler = NULL;
|
|
} else {
|
|
/* Assume a single IPMB channel at zero. */
|
|
intf->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB;
|
|
intf->channels[0].protocol = IPMI_CHANNEL_PROTOCOL_IPMB;
|
|
}
|
|
|
|
if (rv == 0)
|
|
rv = add_proc_entries(intf, i);
|
|
|
|
rv = ipmi_bmc_register(intf, i, sysfs_name);
|
|
|
|
out:
|
|
if (rv) {
|
|
if (intf->proc_dir)
|
|
remove_proc_entries(intf);
|
|
intf->handlers = NULL;
|
|
list_del_rcu(&intf->link);
|
|
mutex_unlock(&ipmi_interfaces_mutex);
|
|
mutex_unlock(&smi_watchers_mutex);
|
|
synchronize_rcu();
|
|
kref_put(&intf->refcount, intf_free);
|
|
} else {
|
|
/*
|
|
* Keep memory order straight for RCU readers. Make
|
|
* sure everything else is committed to memory before
|
|
* setting intf_num to mark the interface valid.
|
|
*/
|
|
smp_wmb();
|
|
intf->intf_num = i;
|
|
mutex_unlock(&ipmi_interfaces_mutex);
|
|
/* After this point the interface is legal to use. */
|
|
call_smi_watchers(i, intf->si_dev);
|
|
mutex_unlock(&smi_watchers_mutex);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_register_smi);
|
|
|
|
static void cleanup_smi_msgs(ipmi_smi_t intf)
|
|
{
|
|
int i;
|
|
struct seq_table *ent;
|
|
|
|
/* No need for locks, the interface is down. */
|
|
for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
|
|
ent = &(intf->seq_table[i]);
|
|
if (!ent->inuse)
|
|
continue;
|
|
deliver_err_response(ent->recv_msg, IPMI_ERR_UNSPECIFIED);
|
|
}
|
|
}
|
|
|
|
int ipmi_unregister_smi(ipmi_smi_t intf)
|
|
{
|
|
struct ipmi_smi_watcher *w;
|
|
int intf_num = intf->intf_num;
|
|
|
|
ipmi_bmc_unregister(intf);
|
|
|
|
mutex_lock(&smi_watchers_mutex);
|
|
mutex_lock(&ipmi_interfaces_mutex);
|
|
intf->intf_num = -1;
|
|
intf->handlers = NULL;
|
|
list_del_rcu(&intf->link);
|
|
mutex_unlock(&ipmi_interfaces_mutex);
|
|
synchronize_rcu();
|
|
|
|
cleanup_smi_msgs(intf);
|
|
|
|
remove_proc_entries(intf);
|
|
|
|
/*
|
|
* Call all the watcher interfaces to tell them that
|
|
* an interface is gone.
|
|
*/
|
|
list_for_each_entry(w, &smi_watchers, link)
|
|
w->smi_gone(intf_num);
|
|
mutex_unlock(&smi_watchers_mutex);
|
|
|
|
kref_put(&intf->refcount, intf_free);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_unregister_smi);
|
|
|
|
static int handle_ipmb_get_msg_rsp(ipmi_smi_t intf,
|
|
struct ipmi_smi_msg *msg)
|
|
{
|
|
struct ipmi_ipmb_addr ipmb_addr;
|
|
struct ipmi_recv_msg *recv_msg;
|
|
|
|
/*
|
|
* This is 11, not 10, because the response must contain a
|
|
* completion code.
|
|
*/
|
|
if (msg->rsp_size < 11) {
|
|
/* Message not big enough, just ignore it. */
|
|
ipmi_inc_stat(intf, invalid_ipmb_responses);
|
|
return 0;
|
|
}
|
|
|
|
if (msg->rsp[2] != 0) {
|
|
/* An error getting the response, just ignore it. */
|
|
return 0;
|
|
}
|
|
|
|
ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE;
|
|
ipmb_addr.slave_addr = msg->rsp[6];
|
|
ipmb_addr.channel = msg->rsp[3] & 0x0f;
|
|
ipmb_addr.lun = msg->rsp[7] & 3;
|
|
|
|
/*
|
|
* It's a response from a remote entity. Look up the sequence
|
|
* number and handle the response.
|
|
*/
|
|
if (intf_find_seq(intf,
|
|
msg->rsp[7] >> 2,
|
|
msg->rsp[3] & 0x0f,
|
|
msg->rsp[8],
|
|
(msg->rsp[4] >> 2) & (~1),
|
|
(struct ipmi_addr *) &(ipmb_addr),
|
|
&recv_msg)) {
|
|
/*
|
|
* We were unable to find the sequence number,
|
|
* so just nuke the message.
|
|
*/
|
|
ipmi_inc_stat(intf, unhandled_ipmb_responses);
|
|
return 0;
|
|
}
|
|
|
|
memcpy(recv_msg->msg_data,
|
|
&(msg->rsp[9]),
|
|
msg->rsp_size - 9);
|
|
/*
|
|
* The other fields matched, so no need to set them, except
|
|
* for netfn, which needs to be the response that was
|
|
* returned, not the request value.
|
|
*/
|
|
recv_msg->msg.netfn = msg->rsp[4] >> 2;
|
|
recv_msg->msg.data = recv_msg->msg_data;
|
|
recv_msg->msg.data_len = msg->rsp_size - 10;
|
|
recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
|
|
ipmi_inc_stat(intf, handled_ipmb_responses);
|
|
deliver_response(recv_msg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int handle_ipmb_get_msg_cmd(ipmi_smi_t intf,
|
|
struct ipmi_smi_msg *msg)
|
|
{
|
|
struct cmd_rcvr *rcvr;
|
|
int rv = 0;
|
|
unsigned char netfn;
|
|
unsigned char cmd;
|
|
unsigned char chan;
|
|
ipmi_user_t user = NULL;
|
|
struct ipmi_ipmb_addr *ipmb_addr;
|
|
struct ipmi_recv_msg *recv_msg;
|
|
struct ipmi_smi_handlers *handlers;
|
|
|
|
if (msg->rsp_size < 10) {
|
|
/* Message not big enough, just ignore it. */
|
|
ipmi_inc_stat(intf, invalid_commands);
|
|
return 0;
|
|
}
|
|
|
|
if (msg->rsp[2] != 0) {
|
|
/* An error getting the response, just ignore it. */
|
|
return 0;
|
|
}
|
|
|
|
netfn = msg->rsp[4] >> 2;
|
|
cmd = msg->rsp[8];
|
|
chan = msg->rsp[3] & 0xf;
|
|
|
|
rcu_read_lock();
|
|
rcvr = find_cmd_rcvr(intf, netfn, cmd, chan);
|
|
if (rcvr) {
|
|
user = rcvr->user;
|
|
kref_get(&user->refcount);
|
|
} else
|
|
user = NULL;
|
|
rcu_read_unlock();
|
|
|
|
if (user == NULL) {
|
|
/* We didn't find a user, deliver an error response. */
|
|
ipmi_inc_stat(intf, unhandled_commands);
|
|
|
|
msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
|
|
msg->data[1] = IPMI_SEND_MSG_CMD;
|
|
msg->data[2] = msg->rsp[3];
|
|
msg->data[3] = msg->rsp[6];
|
|
msg->data[4] = ((netfn + 1) << 2) | (msg->rsp[7] & 0x3);
|
|
msg->data[5] = ipmb_checksum(&(msg->data[3]), 2);
|
|
msg->data[6] = intf->channels[msg->rsp[3] & 0xf].address;
|
|
/* rqseq/lun */
|
|
msg->data[7] = (msg->rsp[7] & 0xfc) | (msg->rsp[4] & 0x3);
|
|
msg->data[8] = msg->rsp[8]; /* cmd */
|
|
msg->data[9] = IPMI_INVALID_CMD_COMPLETION_CODE;
|
|
msg->data[10] = ipmb_checksum(&(msg->data[6]), 4);
|
|
msg->data_size = 11;
|
|
|
|
#ifdef DEBUG_MSGING
|
|
{
|
|
int m;
|
|
printk("Invalid command:");
|
|
for (m = 0; m < msg->data_size; m++)
|
|
printk(" %2.2x", msg->data[m]);
|
|
printk("\n");
|
|
}
|
|
#endif
|
|
rcu_read_lock();
|
|
handlers = intf->handlers;
|
|
if (handlers) {
|
|
handlers->sender(intf->send_info, msg, 0);
|
|
/*
|
|
* We used the message, so return the value
|
|
* that causes it to not be freed or
|
|
* queued.
|
|
*/
|
|
rv = -1;
|
|
}
|
|
rcu_read_unlock();
|
|
} else {
|
|
/* Deliver the message to the user. */
|
|
ipmi_inc_stat(intf, handled_commands);
|
|
|
|
recv_msg = ipmi_alloc_recv_msg();
|
|
if (!recv_msg) {
|
|
/*
|
|
* We couldn't allocate memory for the
|
|
* message, so requeue it for handling
|
|
* later.
|
|
*/
|
|
rv = 1;
|
|
kref_put(&user->refcount, free_user);
|
|
} else {
|
|
/* Extract the source address from the data. */
|
|
ipmb_addr = (struct ipmi_ipmb_addr *) &recv_msg->addr;
|
|
ipmb_addr->addr_type = IPMI_IPMB_ADDR_TYPE;
|
|
ipmb_addr->slave_addr = msg->rsp[6];
|
|
ipmb_addr->lun = msg->rsp[7] & 3;
|
|
ipmb_addr->channel = msg->rsp[3] & 0xf;
|
|
|
|
/*
|
|
* Extract the rest of the message information
|
|
* from the IPMB header.
|
|
*/
|
|
recv_msg->user = user;
|
|
recv_msg->recv_type = IPMI_CMD_RECV_TYPE;
|
|
recv_msg->msgid = msg->rsp[7] >> 2;
|
|
recv_msg->msg.netfn = msg->rsp[4] >> 2;
|
|
recv_msg->msg.cmd = msg->rsp[8];
|
|
recv_msg->msg.data = recv_msg->msg_data;
|
|
|
|
/*
|
|
* We chop off 10, not 9 bytes because the checksum
|
|
* at the end also needs to be removed.
|
|
*/
|
|
recv_msg->msg.data_len = msg->rsp_size - 10;
|
|
memcpy(recv_msg->msg_data,
|
|
&(msg->rsp[9]),
|
|
msg->rsp_size - 10);
|
|
deliver_response(recv_msg);
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
static int handle_lan_get_msg_rsp(ipmi_smi_t intf,
|
|
struct ipmi_smi_msg *msg)
|
|
{
|
|
struct ipmi_lan_addr lan_addr;
|
|
struct ipmi_recv_msg *recv_msg;
|
|
|
|
|
|
/*
|
|
* This is 13, not 12, because the response must contain a
|
|
* completion code.
|
|
*/
|
|
if (msg->rsp_size < 13) {
|
|
/* Message not big enough, just ignore it. */
|
|
ipmi_inc_stat(intf, invalid_lan_responses);
|
|
return 0;
|
|
}
|
|
|
|
if (msg->rsp[2] != 0) {
|
|
/* An error getting the response, just ignore it. */
|
|
return 0;
|
|
}
|
|
|
|
lan_addr.addr_type = IPMI_LAN_ADDR_TYPE;
|
|
lan_addr.session_handle = msg->rsp[4];
|
|
lan_addr.remote_SWID = msg->rsp[8];
|
|
lan_addr.local_SWID = msg->rsp[5];
|
|
lan_addr.channel = msg->rsp[3] & 0x0f;
|
|
lan_addr.privilege = msg->rsp[3] >> 4;
|
|
lan_addr.lun = msg->rsp[9] & 3;
|
|
|
|
/*
|
|
* It's a response from a remote entity. Look up the sequence
|
|
* number and handle the response.
|
|
*/
|
|
if (intf_find_seq(intf,
|
|
msg->rsp[9] >> 2,
|
|
msg->rsp[3] & 0x0f,
|
|
msg->rsp[10],
|
|
(msg->rsp[6] >> 2) & (~1),
|
|
(struct ipmi_addr *) &(lan_addr),
|
|
&recv_msg)) {
|
|
/*
|
|
* We were unable to find the sequence number,
|
|
* so just nuke the message.
|
|
*/
|
|
ipmi_inc_stat(intf, unhandled_lan_responses);
|
|
return 0;
|
|
}
|
|
|
|
memcpy(recv_msg->msg_data,
|
|
&(msg->rsp[11]),
|
|
msg->rsp_size - 11);
|
|
/*
|
|
* The other fields matched, so no need to set them, except
|
|
* for netfn, which needs to be the response that was
|
|
* returned, not the request value.
|
|
*/
|
|
recv_msg->msg.netfn = msg->rsp[6] >> 2;
|
|
recv_msg->msg.data = recv_msg->msg_data;
|
|
recv_msg->msg.data_len = msg->rsp_size - 12;
|
|
recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
|
|
ipmi_inc_stat(intf, handled_lan_responses);
|
|
deliver_response(recv_msg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int handle_lan_get_msg_cmd(ipmi_smi_t intf,
|
|
struct ipmi_smi_msg *msg)
|
|
{
|
|
struct cmd_rcvr *rcvr;
|
|
int rv = 0;
|
|
unsigned char netfn;
|
|
unsigned char cmd;
|
|
unsigned char chan;
|
|
ipmi_user_t user = NULL;
|
|
struct ipmi_lan_addr *lan_addr;
|
|
struct ipmi_recv_msg *recv_msg;
|
|
|
|
if (msg->rsp_size < 12) {
|
|
/* Message not big enough, just ignore it. */
|
|
ipmi_inc_stat(intf, invalid_commands);
|
|
return 0;
|
|
}
|
|
|
|
if (msg->rsp[2] != 0) {
|
|
/* An error getting the response, just ignore it. */
|
|
return 0;
|
|
}
|
|
|
|
netfn = msg->rsp[6] >> 2;
|
|
cmd = msg->rsp[10];
|
|
chan = msg->rsp[3] & 0xf;
|
|
|
|
rcu_read_lock();
|
|
rcvr = find_cmd_rcvr(intf, netfn, cmd, chan);
|
|
if (rcvr) {
|
|
user = rcvr->user;
|
|
kref_get(&user->refcount);
|
|
} else
|
|
user = NULL;
|
|
rcu_read_unlock();
|
|
|
|
if (user == NULL) {
|
|
/* We didn't find a user, just give up. */
|
|
ipmi_inc_stat(intf, unhandled_commands);
|
|
|
|
/*
|
|
* Don't do anything with these messages, just allow
|
|
* them to be freed.
|
|
*/
|
|
rv = 0;
|
|
} else {
|
|
/* Deliver the message to the user. */
|
|
ipmi_inc_stat(intf, handled_commands);
|
|
|
|
recv_msg = ipmi_alloc_recv_msg();
|
|
if (!recv_msg) {
|
|
/*
|
|
* We couldn't allocate memory for the
|
|
* message, so requeue it for handling later.
|
|
*/
|
|
rv = 1;
|
|
kref_put(&user->refcount, free_user);
|
|
} else {
|
|
/* Extract the source address from the data. */
|
|
lan_addr = (struct ipmi_lan_addr *) &recv_msg->addr;
|
|
lan_addr->addr_type = IPMI_LAN_ADDR_TYPE;
|
|
lan_addr->session_handle = msg->rsp[4];
|
|
lan_addr->remote_SWID = msg->rsp[8];
|
|
lan_addr->local_SWID = msg->rsp[5];
|
|
lan_addr->lun = msg->rsp[9] & 3;
|
|
lan_addr->channel = msg->rsp[3] & 0xf;
|
|
lan_addr->privilege = msg->rsp[3] >> 4;
|
|
|
|
/*
|
|
* Extract the rest of the message information
|
|
* from the IPMB header.
|
|
*/
|
|
recv_msg->user = user;
|
|
recv_msg->recv_type = IPMI_CMD_RECV_TYPE;
|
|
recv_msg->msgid = msg->rsp[9] >> 2;
|
|
recv_msg->msg.netfn = msg->rsp[6] >> 2;
|
|
recv_msg->msg.cmd = msg->rsp[10];
|
|
recv_msg->msg.data = recv_msg->msg_data;
|
|
|
|
/*
|
|
* We chop off 12, not 11 bytes because the checksum
|
|
* at the end also needs to be removed.
|
|
*/
|
|
recv_msg->msg.data_len = msg->rsp_size - 12;
|
|
memcpy(recv_msg->msg_data,
|
|
&(msg->rsp[11]),
|
|
msg->rsp_size - 12);
|
|
deliver_response(recv_msg);
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg,
|
|
struct ipmi_smi_msg *msg)
|
|
{
|
|
struct ipmi_system_interface_addr *smi_addr;
|
|
|
|
recv_msg->msgid = 0;
|
|
smi_addr = (struct ipmi_system_interface_addr *) &(recv_msg->addr);
|
|
smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
|
|
smi_addr->channel = IPMI_BMC_CHANNEL;
|
|
smi_addr->lun = msg->rsp[0] & 3;
|
|
recv_msg->recv_type = IPMI_ASYNC_EVENT_RECV_TYPE;
|
|
recv_msg->msg.netfn = msg->rsp[0] >> 2;
|
|
recv_msg->msg.cmd = msg->rsp[1];
|
|
memcpy(recv_msg->msg_data, &(msg->rsp[3]), msg->rsp_size - 3);
|
|
recv_msg->msg.data = recv_msg->msg_data;
|
|
recv_msg->msg.data_len = msg->rsp_size - 3;
|
|
}
|
|
|
|
static int handle_read_event_rsp(ipmi_smi_t intf,
|
|
struct ipmi_smi_msg *msg)
|
|
{
|
|
struct ipmi_recv_msg *recv_msg, *recv_msg2;
|
|
struct list_head msgs;
|
|
ipmi_user_t user;
|
|
int rv = 0;
|
|
int deliver_count = 0;
|
|
unsigned long flags;
|
|
|
|
if (msg->rsp_size < 19) {
|
|
/* Message is too small to be an IPMB event. */
|
|
ipmi_inc_stat(intf, invalid_events);
|
|
return 0;
|
|
}
|
|
|
|
if (msg->rsp[2] != 0) {
|
|
/* An error getting the event, just ignore it. */
|
|
return 0;
|
|
}
|
|
|
|
INIT_LIST_HEAD(&msgs);
|
|
|
|
spin_lock_irqsave(&intf->events_lock, flags);
|
|
|
|
ipmi_inc_stat(intf, events);
|
|
|
|
/*
|
|
* Allocate and fill in one message for every user that is
|
|
* getting events.
|
|
*/
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(user, &intf->users, link) {
|
|
if (!user->gets_events)
|
|
continue;
|
|
|
|
recv_msg = ipmi_alloc_recv_msg();
|
|
if (!recv_msg) {
|
|
rcu_read_unlock();
|
|
list_for_each_entry_safe(recv_msg, recv_msg2, &msgs,
|
|
link) {
|
|
list_del(&recv_msg->link);
|
|
ipmi_free_recv_msg(recv_msg);
|
|
}
|
|
/*
|
|
* We couldn't allocate memory for the
|
|
* message, so requeue it for handling
|
|
* later.
|
|
*/
|
|
rv = 1;
|
|
goto out;
|
|
}
|
|
|
|
deliver_count++;
|
|
|
|
copy_event_into_recv_msg(recv_msg, msg);
|
|
recv_msg->user = user;
|
|
kref_get(&user->refcount);
|
|
list_add_tail(&(recv_msg->link), &msgs);
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
if (deliver_count) {
|
|
/* Now deliver all the messages. */
|
|
list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) {
|
|
list_del(&recv_msg->link);
|
|
deliver_response(recv_msg);
|
|
}
|
|
} else if (intf->waiting_events_count < MAX_EVENTS_IN_QUEUE) {
|
|
/*
|
|
* No one to receive the message, put it in queue if there's
|
|
* not already too many things in the queue.
|
|
*/
|
|
recv_msg = ipmi_alloc_recv_msg();
|
|
if (!recv_msg) {
|
|
/*
|
|
* We couldn't allocate memory for the
|
|
* message, so requeue it for handling
|
|
* later.
|
|
*/
|
|
rv = 1;
|
|
goto out;
|
|
}
|
|
|
|
copy_event_into_recv_msg(recv_msg, msg);
|
|
list_add_tail(&(recv_msg->link), &(intf->waiting_events));
|
|
intf->waiting_events_count++;
|
|
} else if (!intf->event_msg_printed) {
|
|
/*
|
|
* There's too many things in the queue, discard this
|
|
* message.
|
|
*/
|
|
printk(KERN_WARNING PFX "Event queue full, discarding"
|
|
" incoming events\n");
|
|
intf->event_msg_printed = 1;
|
|
}
|
|
|
|
out:
|
|
spin_unlock_irqrestore(&(intf->events_lock), flags);
|
|
|
|
return rv;
|
|
}
|
|
|
|
static int handle_bmc_rsp(ipmi_smi_t intf,
|
|
struct ipmi_smi_msg *msg)
|
|
{
|
|
struct ipmi_recv_msg *recv_msg;
|
|
struct ipmi_user *user;
|
|
|
|
recv_msg = (struct ipmi_recv_msg *) msg->user_data;
|
|
if (recv_msg == NULL) {
|
|
printk(KERN_WARNING
|
|
"IPMI message received with no owner. This\n"
|
|
"could be because of a malformed message, or\n"
|
|
"because of a hardware error. Contact your\n"
|
|
"hardware vender for assistance\n");
|
|
return 0;
|
|
}
|
|
|
|
user = recv_msg->user;
|
|
/* Make sure the user still exists. */
|
|
if (user && !user->valid) {
|
|
/* The user for the message went away, so give up. */
|
|
ipmi_inc_stat(intf, unhandled_local_responses);
|
|
ipmi_free_recv_msg(recv_msg);
|
|
} else {
|
|
struct ipmi_system_interface_addr *smi_addr;
|
|
|
|
ipmi_inc_stat(intf, handled_local_responses);
|
|
recv_msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
|
|
recv_msg->msgid = msg->msgid;
|
|
smi_addr = ((struct ipmi_system_interface_addr *)
|
|
&(recv_msg->addr));
|
|
smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
|
|
smi_addr->channel = IPMI_BMC_CHANNEL;
|
|
smi_addr->lun = msg->rsp[0] & 3;
|
|
recv_msg->msg.netfn = msg->rsp[0] >> 2;
|
|
recv_msg->msg.cmd = msg->rsp[1];
|
|
memcpy(recv_msg->msg_data,
|
|
&(msg->rsp[2]),
|
|
msg->rsp_size - 2);
|
|
recv_msg->msg.data = recv_msg->msg_data;
|
|
recv_msg->msg.data_len = msg->rsp_size - 2;
|
|
deliver_response(recv_msg);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Handle a new message. Return 1 if the message should be requeued,
|
|
* 0 if the message should be freed, or -1 if the message should not
|
|
* be freed or requeued.
|
|
*/
|
|
static int handle_new_recv_msg(ipmi_smi_t intf,
|
|
struct ipmi_smi_msg *msg)
|
|
{
|
|
int requeue;
|
|
int chan;
|
|
|
|
#ifdef DEBUG_MSGING
|
|
int m;
|
|
printk("Recv:");
|
|
for (m = 0; m < msg->rsp_size; m++)
|
|
printk(" %2.2x", msg->rsp[m]);
|
|
printk("\n");
|
|
#endif
|
|
if (msg->rsp_size < 2) {
|
|
/* Message is too small to be correct. */
|
|
printk(KERN_WARNING PFX "BMC returned to small a message"
|
|
" for netfn %x cmd %x, got %d bytes\n",
|
|
(msg->data[0] >> 2) | 1, msg->data[1], msg->rsp_size);
|
|
|
|
/* Generate an error response for the message. */
|
|
msg->rsp[0] = msg->data[0] | (1 << 2);
|
|
msg->rsp[1] = msg->data[1];
|
|
msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
|
|
msg->rsp_size = 3;
|
|
} else if (((msg->rsp[0] >> 2) != ((msg->data[0] >> 2) | 1))
|
|
|| (msg->rsp[1] != msg->data[1])) {
|
|
/*
|
|
* The NetFN and Command in the response is not even
|
|
* marginally correct.
|
|
*/
|
|
printk(KERN_WARNING PFX "BMC returned incorrect response,"
|
|
" expected netfn %x cmd %x, got netfn %x cmd %x\n",
|
|
(msg->data[0] >> 2) | 1, msg->data[1],
|
|
msg->rsp[0] >> 2, msg->rsp[1]);
|
|
|
|
/* Generate an error response for the message. */
|
|
msg->rsp[0] = msg->data[0] | (1 << 2);
|
|
msg->rsp[1] = msg->data[1];
|
|
msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
|
|
msg->rsp_size = 3;
|
|
}
|
|
|
|
if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
|
|
&& (msg->rsp[1] == IPMI_SEND_MSG_CMD)
|
|
&& (msg->user_data != NULL)) {
|
|
/*
|
|
* It's a response to a response we sent. For this we
|
|
* deliver a send message response to the user.
|
|
*/
|
|
struct ipmi_recv_msg *recv_msg = msg->user_data;
|
|
|
|
requeue = 0;
|
|
if (msg->rsp_size < 2)
|
|
/* Message is too small to be correct. */
|
|
goto out;
|
|
|
|
chan = msg->data[2] & 0x0f;
|
|
if (chan >= IPMI_MAX_CHANNELS)
|
|
/* Invalid channel number */
|
|
goto out;
|
|
|
|
if (!recv_msg)
|
|
goto out;
|
|
|
|
/* Make sure the user still exists. */
|
|
if (!recv_msg->user || !recv_msg->user->valid)
|
|
goto out;
|
|
|
|
recv_msg->recv_type = IPMI_RESPONSE_RESPONSE_TYPE;
|
|
recv_msg->msg.data = recv_msg->msg_data;
|
|
recv_msg->msg.data_len = 1;
|
|
recv_msg->msg_data[0] = msg->rsp[2];
|
|
deliver_response(recv_msg);
|
|
} else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
|
|
&& (msg->rsp[1] == IPMI_GET_MSG_CMD)) {
|
|
/* It's from the receive queue. */
|
|
chan = msg->rsp[3] & 0xf;
|
|
if (chan >= IPMI_MAX_CHANNELS) {
|
|
/* Invalid channel number */
|
|
requeue = 0;
|
|
goto out;
|
|
}
|
|
|
|
switch (intf->channels[chan].medium) {
|
|
case IPMI_CHANNEL_MEDIUM_IPMB:
|
|
if (msg->rsp[4] & 0x04) {
|
|
/*
|
|
* It's a response, so find the
|
|
* requesting message and send it up.
|
|
*/
|
|
requeue = handle_ipmb_get_msg_rsp(intf, msg);
|
|
} else {
|
|
/*
|
|
* It's a command to the SMS from some other
|
|
* entity. Handle that.
|
|
*/
|
|
requeue = handle_ipmb_get_msg_cmd(intf, msg);
|
|
}
|
|
break;
|
|
|
|
case IPMI_CHANNEL_MEDIUM_8023LAN:
|
|
case IPMI_CHANNEL_MEDIUM_ASYNC:
|
|
if (msg->rsp[6] & 0x04) {
|
|
/*
|
|
* It's a response, so find the
|
|
* requesting message and send it up.
|
|
*/
|
|
requeue = handle_lan_get_msg_rsp(intf, msg);
|
|
} else {
|
|
/*
|
|
* It's a command to the SMS from some other
|
|
* entity. Handle that.
|
|
*/
|
|
requeue = handle_lan_get_msg_cmd(intf, msg);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* We don't handle the channel type, so just
|
|
* free the message.
|
|
*/
|
|
requeue = 0;
|
|
}
|
|
|
|
} else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2))
|
|
&& (msg->rsp[1] == IPMI_READ_EVENT_MSG_BUFFER_CMD)) {
|
|
/* It's an asyncronous event. */
|
|
requeue = handle_read_event_rsp(intf, msg);
|
|
} else {
|
|
/* It's a response from the local BMC. */
|
|
requeue = handle_bmc_rsp(intf, msg);
|
|
}
|
|
|
|
out:
|
|
return requeue;
|
|
}
|
|
|
|
/* Handle a new message from the lower layer. */
|
|
void ipmi_smi_msg_received(ipmi_smi_t intf,
|
|
struct ipmi_smi_msg *msg)
|
|
{
|
|
unsigned long flags = 0; /* keep us warning-free. */
|
|
int rv;
|
|
int run_to_completion;
|
|
|
|
|
|
if ((msg->data_size >= 2)
|
|
&& (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2))
|
|
&& (msg->data[1] == IPMI_SEND_MSG_CMD)
|
|
&& (msg->user_data == NULL)) {
|
|
/*
|
|
* This is the local response to a command send, start
|
|
* the timer for these. The user_data will not be
|
|
* NULL if this is a response send, and we will let
|
|
* response sends just go through.
|
|
*/
|
|
|
|
/*
|
|
* Check for errors, if we get certain errors (ones
|
|
* that mean basically we can try again later), we
|
|
* ignore them and start the timer. Otherwise we
|
|
* report the error immediately.
|
|
*/
|
|
if ((msg->rsp_size >= 3) && (msg->rsp[2] != 0)
|
|
&& (msg->rsp[2] != IPMI_NODE_BUSY_ERR)
|
|
&& (msg->rsp[2] != IPMI_LOST_ARBITRATION_ERR)
|
|
&& (msg->rsp[2] != IPMI_BUS_ERR)
|
|
&& (msg->rsp[2] != IPMI_NAK_ON_WRITE_ERR)) {
|
|
int chan = msg->rsp[3] & 0xf;
|
|
|
|
/* Got an error sending the message, handle it. */
|
|
if (chan >= IPMI_MAX_CHANNELS)
|
|
; /* This shouldn't happen */
|
|
else if ((intf->channels[chan].medium
|
|
== IPMI_CHANNEL_MEDIUM_8023LAN)
|
|
|| (intf->channels[chan].medium
|
|
== IPMI_CHANNEL_MEDIUM_ASYNC))
|
|
ipmi_inc_stat(intf, sent_lan_command_errs);
|
|
else
|
|
ipmi_inc_stat(intf, sent_ipmb_command_errs);
|
|
intf_err_seq(intf, msg->msgid, msg->rsp[2]);
|
|
} else
|
|
/* The message was sent, start the timer. */
|
|
intf_start_seq_timer(intf, msg->msgid);
|
|
|
|
ipmi_free_smi_msg(msg);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* To preserve message order, if the list is not empty, we
|
|
* tack this message onto the end of the list.
|
|
*/
|
|
run_to_completion = intf->run_to_completion;
|
|
if (!run_to_completion)
|
|
spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
|
|
if (!list_empty(&intf->waiting_msgs)) {
|
|
list_add_tail(&msg->link, &intf->waiting_msgs);
|
|
if (!run_to_completion)
|
|
spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
|
|
goto out;
|
|
}
|
|
if (!run_to_completion)
|
|
spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
|
|
|
|
rv = handle_new_recv_msg(intf, msg);
|
|
if (rv > 0) {
|
|
/*
|
|
* Could not handle the message now, just add it to a
|
|
* list to handle later.
|
|
*/
|
|
run_to_completion = intf->run_to_completion;
|
|
if (!run_to_completion)
|
|
spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
|
|
list_add_tail(&msg->link, &intf->waiting_msgs);
|
|
if (!run_to_completion)
|
|
spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
|
|
} else if (rv == 0) {
|
|
ipmi_free_smi_msg(msg);
|
|
}
|
|
|
|
out:
|
|
return;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_smi_msg_received);
|
|
|
|
void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf)
|
|
{
|
|
ipmi_user_t user;
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(user, &intf->users, link) {
|
|
if (!user->handler->ipmi_watchdog_pretimeout)
|
|
continue;
|
|
|
|
user->handler->ipmi_watchdog_pretimeout(user->handler_data);
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout);
|
|
|
|
static struct ipmi_smi_msg *
|
|
smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg,
|
|
unsigned char seq, long seqid)
|
|
{
|
|
struct ipmi_smi_msg *smi_msg = ipmi_alloc_smi_msg();
|
|
if (!smi_msg)
|
|
/*
|
|
* If we can't allocate the message, then just return, we
|
|
* get 4 retries, so this should be ok.
|
|
*/
|
|
return NULL;
|
|
|
|
memcpy(smi_msg->data, recv_msg->msg.data, recv_msg->msg.data_len);
|
|
smi_msg->data_size = recv_msg->msg.data_len;
|
|
smi_msg->msgid = STORE_SEQ_IN_MSGID(seq, seqid);
|
|
|
|
#ifdef DEBUG_MSGING
|
|
{
|
|
int m;
|
|
printk("Resend: ");
|
|
for (m = 0; m < smi_msg->data_size; m++)
|
|
printk(" %2.2x", smi_msg->data[m]);
|
|
printk("\n");
|
|
}
|
|
#endif
|
|
return smi_msg;
|
|
}
|
|
|
|
static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
|
|
struct list_head *timeouts, long timeout_period,
|
|
int slot, unsigned long *flags)
|
|
{
|
|
struct ipmi_recv_msg *msg;
|
|
struct ipmi_smi_handlers *handlers;
|
|
|
|
if (intf->intf_num == -1)
|
|
return;
|
|
|
|
if (!ent->inuse)
|
|
return;
|
|
|
|
ent->timeout -= timeout_period;
|
|
if (ent->timeout > 0)
|
|
return;
|
|
|
|
if (ent->retries_left == 0) {
|
|
/* The message has used all its retries. */
|
|
ent->inuse = 0;
|
|
msg = ent->recv_msg;
|
|
list_add_tail(&msg->link, timeouts);
|
|
if (ent->broadcast)
|
|
ipmi_inc_stat(intf, timed_out_ipmb_broadcasts);
|
|
else if (ent->recv_msg->addr.addr_type == IPMI_LAN_ADDR_TYPE)
|
|
ipmi_inc_stat(intf, timed_out_lan_commands);
|
|
else
|
|
ipmi_inc_stat(intf, timed_out_ipmb_commands);
|
|
} else {
|
|
struct ipmi_smi_msg *smi_msg;
|
|
/* More retries, send again. */
|
|
|
|
/*
|
|
* Start with the max timer, set to normal timer after
|
|
* the message is sent.
|
|
*/
|
|
ent->timeout = MAX_MSG_TIMEOUT;
|
|
ent->retries_left--;
|
|
if (ent->recv_msg->addr.addr_type == IPMI_LAN_ADDR_TYPE)
|
|
ipmi_inc_stat(intf, retransmitted_lan_commands);
|
|
else
|
|
ipmi_inc_stat(intf, retransmitted_ipmb_commands);
|
|
|
|
smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot,
|
|
ent->seqid);
|
|
if (!smi_msg)
|
|
return;
|
|
|
|
spin_unlock_irqrestore(&intf->seq_lock, *flags);
|
|
|
|
/*
|
|
* Send the new message. We send with a zero
|
|
* priority. It timed out, I doubt time is that
|
|
* critical now, and high priority messages are really
|
|
* only for messages to the local MC, which don't get
|
|
* resent.
|
|
*/
|
|
handlers = intf->handlers;
|
|
if (handlers)
|
|
intf->handlers->sender(intf->send_info,
|
|
smi_msg, 0);
|
|
else
|
|
ipmi_free_smi_msg(smi_msg);
|
|
|
|
spin_lock_irqsave(&intf->seq_lock, *flags);
|
|
}
|
|
}
|
|
|
|
static void ipmi_timeout_handler(long timeout_period)
|
|
{
|
|
ipmi_smi_t intf;
|
|
struct list_head timeouts;
|
|
struct ipmi_recv_msg *msg, *msg2;
|
|
struct ipmi_smi_msg *smi_msg, *smi_msg2;
|
|
unsigned long flags;
|
|
int i;
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
|
|
/* See if any waiting messages need to be processed. */
|
|
spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
|
|
list_for_each_entry_safe(smi_msg, smi_msg2,
|
|
&intf->waiting_msgs, link) {
|
|
if (!handle_new_recv_msg(intf, smi_msg)) {
|
|
list_del(&smi_msg->link);
|
|
ipmi_free_smi_msg(smi_msg);
|
|
} else {
|
|
/*
|
|
* To preserve message order, quit if we
|
|
* can't handle a message.
|
|
*/
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
|
|
|
|
/*
|
|
* Go through the seq table and find any messages that
|
|
* have timed out, putting them in the timeouts
|
|
* list.
|
|
*/
|
|
INIT_LIST_HEAD(&timeouts);
|
|
spin_lock_irqsave(&intf->seq_lock, flags);
|
|
for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++)
|
|
check_msg_timeout(intf, &(intf->seq_table[i]),
|
|
&timeouts, timeout_period, i,
|
|
&flags);
|
|
spin_unlock_irqrestore(&intf->seq_lock, flags);
|
|
|
|
list_for_each_entry_safe(msg, msg2, &timeouts, link)
|
|
deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE);
|
|
|
|
/*
|
|
* Maintenance mode handling. Check the timeout
|
|
* optimistically before we claim the lock. It may
|
|
* mean a timeout gets missed occasionally, but that
|
|
* only means the timeout gets extended by one period
|
|
* in that case. No big deal, and it avoids the lock
|
|
* most of the time.
|
|
*/
|
|
if (intf->auto_maintenance_timeout > 0) {
|
|
spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
|
|
if (intf->auto_maintenance_timeout > 0) {
|
|
intf->auto_maintenance_timeout
|
|
-= timeout_period;
|
|
if (!intf->maintenance_mode
|
|
&& (intf->auto_maintenance_timeout <= 0)) {
|
|
intf->maintenance_mode_enable = 0;
|
|
maintenance_mode_update(intf);
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&intf->maintenance_mode_lock,
|
|
flags);
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static void ipmi_request_event(void)
|
|
{
|
|
ipmi_smi_t intf;
|
|
struct ipmi_smi_handlers *handlers;
|
|
|
|
rcu_read_lock();
|
|
/*
|
|
* Called from the timer, no need to check if handlers is
|
|
* valid.
|
|
*/
|
|
list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
|
|
/* No event requests when in maintenance mode. */
|
|
if (intf->maintenance_mode_enable)
|
|
continue;
|
|
|
|
handlers = intf->handlers;
|
|
if (handlers)
|
|
handlers->request_events(intf->send_info);
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static struct timer_list ipmi_timer;
|
|
|
|
/* Call every ~100 ms. */
|
|
#define IPMI_TIMEOUT_TIME 100
|
|
|
|
/* How many jiffies does it take to get to the timeout time. */
|
|
#define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000)
|
|
|
|
/*
|
|
* Request events from the queue every second (this is the number of
|
|
* IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the
|
|
* future, IPMI will add a way to know immediately if an event is in
|
|
* the queue and this silliness can go away.
|
|
*/
|
|
#define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME))
|
|
|
|
static atomic_t stop_operation;
|
|
static unsigned int ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
|
|
|
|
static void ipmi_timeout(unsigned long data)
|
|
{
|
|
if (atomic_read(&stop_operation))
|
|
return;
|
|
|
|
ticks_to_req_ev--;
|
|
if (ticks_to_req_ev == 0) {
|
|
ipmi_request_event();
|
|
ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
|
|
}
|
|
|
|
ipmi_timeout_handler(IPMI_TIMEOUT_TIME);
|
|
|
|
mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
|
|
}
|
|
|
|
|
|
static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0);
|
|
static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0);
|
|
|
|
/* FIXME - convert these to slabs. */
|
|
static void free_smi_msg(struct ipmi_smi_msg *msg)
|
|
{
|
|
atomic_dec(&smi_msg_inuse_count);
|
|
kfree(msg);
|
|
}
|
|
|
|
struct ipmi_smi_msg *ipmi_alloc_smi_msg(void)
|
|
{
|
|
struct ipmi_smi_msg *rv;
|
|
rv = kmalloc(sizeof(struct ipmi_smi_msg), GFP_ATOMIC);
|
|
if (rv) {
|
|
rv->done = free_smi_msg;
|
|
rv->user_data = NULL;
|
|
atomic_inc(&smi_msg_inuse_count);
|
|
}
|
|
return rv;
|
|
}
|
|
EXPORT_SYMBOL(ipmi_alloc_smi_msg);
|
|
|
|
static void free_recv_msg(struct ipmi_recv_msg *msg)
|
|
{
|
|
atomic_dec(&recv_msg_inuse_count);
|
|
kfree(msg);
|
|
}
|
|
|
|
static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void)
|
|
{
|
|
struct ipmi_recv_msg *rv;
|
|
|
|
rv = kmalloc(sizeof(struct ipmi_recv_msg), GFP_ATOMIC);
|
|
if (rv) {
|
|
rv->user = NULL;
|
|
rv->done = free_recv_msg;
|
|
atomic_inc(&recv_msg_inuse_count);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
void ipmi_free_recv_msg(struct ipmi_recv_msg *msg)
|
|
{
|
|
if (msg->user)
|
|
kref_put(&msg->user->refcount, free_user);
|
|
msg->done(msg);
|
|
}
|
|
EXPORT_SYMBOL(ipmi_free_recv_msg);
|
|
|
|
#ifdef CONFIG_IPMI_PANIC_EVENT
|
|
|
|
static void dummy_smi_done_handler(struct ipmi_smi_msg *msg)
|
|
{
|
|
}
|
|
|
|
static void dummy_recv_done_handler(struct ipmi_recv_msg *msg)
|
|
{
|
|
}
|
|
|
|
#ifdef CONFIG_IPMI_PANIC_STRING
|
|
static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
|
|
{
|
|
if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
|
|
&& (msg->msg.netfn == IPMI_NETFN_SENSOR_EVENT_RESPONSE)
|
|
&& (msg->msg.cmd == IPMI_GET_EVENT_RECEIVER_CMD)
|
|
&& (msg->msg.data[0] == IPMI_CC_NO_ERROR)) {
|
|
/* A get event receiver command, save it. */
|
|
intf->event_receiver = msg->msg.data[1];
|
|
intf->event_receiver_lun = msg->msg.data[2] & 0x3;
|
|
}
|
|
}
|
|
|
|
static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
|
|
{
|
|
if ((msg->addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
|
|
&& (msg->msg.netfn == IPMI_NETFN_APP_RESPONSE)
|
|
&& (msg->msg.cmd == IPMI_GET_DEVICE_ID_CMD)
|
|
&& (msg->msg.data[0] == IPMI_CC_NO_ERROR)) {
|
|
/*
|
|
* A get device id command, save if we are an event
|
|
* receiver or generator.
|
|
*/
|
|
intf->local_sel_device = (msg->msg.data[6] >> 2) & 1;
|
|
intf->local_event_generator = (msg->msg.data[6] >> 5) & 1;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static void send_panic_events(char *str)
|
|
{
|
|
struct kernel_ipmi_msg msg;
|
|
ipmi_smi_t intf;
|
|
unsigned char data[16];
|
|
struct ipmi_system_interface_addr *si;
|
|
struct ipmi_addr addr;
|
|
struct ipmi_smi_msg smi_msg;
|
|
struct ipmi_recv_msg recv_msg;
|
|
|
|
si = (struct ipmi_system_interface_addr *) &addr;
|
|
si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
|
|
si->channel = IPMI_BMC_CHANNEL;
|
|
si->lun = 0;
|
|
|
|
/* Fill in an event telling that we have failed. */
|
|
msg.netfn = 0x04; /* Sensor or Event. */
|
|
msg.cmd = 2; /* Platform event command. */
|
|
msg.data = data;
|
|
msg.data_len = 8;
|
|
data[0] = 0x41; /* Kernel generator ID, IPMI table 5-4 */
|
|
data[1] = 0x03; /* This is for IPMI 1.0. */
|
|
data[2] = 0x20; /* OS Critical Stop, IPMI table 36-3 */
|
|
data[4] = 0x6f; /* Sensor specific, IPMI table 36-1 */
|
|
data[5] = 0xa1; /* Runtime stop OEM bytes 2 & 3. */
|
|
|
|
/*
|
|
* Put a few breadcrumbs in. Hopefully later we can add more things
|
|
* to make the panic events more useful.
|
|
*/
|
|
if (str) {
|
|
data[3] = str[0];
|
|
data[6] = str[1];
|
|
data[7] = str[2];
|
|
}
|
|
|
|
smi_msg.done = dummy_smi_done_handler;
|
|
recv_msg.done = dummy_recv_done_handler;
|
|
|
|
/* For every registered interface, send the event. */
|
|
list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
|
|
if (!intf->handlers)
|
|
/* Interface is not ready. */
|
|
continue;
|
|
|
|
intf->run_to_completion = 1;
|
|
/* Send the event announcing the panic. */
|
|
intf->handlers->set_run_to_completion(intf->send_info, 1);
|
|
i_ipmi_request(NULL,
|
|
intf,
|
|
&addr,
|
|
0,
|
|
&msg,
|
|
intf,
|
|
&smi_msg,
|
|
&recv_msg,
|
|
0,
|
|
intf->channels[0].address,
|
|
intf->channels[0].lun,
|
|
0, 1); /* Don't retry, and don't wait. */
|
|
}
|
|
|
|
#ifdef CONFIG_IPMI_PANIC_STRING
|
|
/*
|
|
* On every interface, dump a bunch of OEM event holding the
|
|
* string.
|
|
*/
|
|
if (!str)
|
|
return;
|
|
|
|
/* For every registered interface, send the event. */
|
|
list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
|
|
char *p = str;
|
|
struct ipmi_ipmb_addr *ipmb;
|
|
int j;
|
|
|
|
if (intf->intf_num == -1)
|
|
/* Interface was not ready yet. */
|
|
continue;
|
|
|
|
/*
|
|
* intf_num is used as an marker to tell if the
|
|
* interface is valid. Thus we need a read barrier to
|
|
* make sure data fetched before checking intf_num
|
|
* won't be used.
|
|
*/
|
|
smp_rmb();
|
|
|
|
/*
|
|
* First job here is to figure out where to send the
|
|
* OEM events. There's no way in IPMI to send OEM
|
|
* events using an event send command, so we have to
|
|
* find the SEL to put them in and stick them in
|
|
* there.
|
|
*/
|
|
|
|
/* Get capabilities from the get device id. */
|
|
intf->local_sel_device = 0;
|
|
intf->local_event_generator = 0;
|
|
intf->event_receiver = 0;
|
|
|
|
/* Request the device info from the local MC. */
|
|
msg.netfn = IPMI_NETFN_APP_REQUEST;
|
|
msg.cmd = IPMI_GET_DEVICE_ID_CMD;
|
|
msg.data = NULL;
|
|
msg.data_len = 0;
|
|
intf->null_user_handler = device_id_fetcher;
|
|
i_ipmi_request(NULL,
|
|
intf,
|
|
&addr,
|
|
0,
|
|
&msg,
|
|
intf,
|
|
&smi_msg,
|
|
&recv_msg,
|
|
0,
|
|
intf->channels[0].address,
|
|
intf->channels[0].lun,
|
|
0, 1); /* Don't retry, and don't wait. */
|
|
|
|
if (intf->local_event_generator) {
|
|
/* Request the event receiver from the local MC. */
|
|
msg.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST;
|
|
msg.cmd = IPMI_GET_EVENT_RECEIVER_CMD;
|
|
msg.data = NULL;
|
|
msg.data_len = 0;
|
|
intf->null_user_handler = event_receiver_fetcher;
|
|
i_ipmi_request(NULL,
|
|
intf,
|
|
&addr,
|
|
0,
|
|
&msg,
|
|
intf,
|
|
&smi_msg,
|
|
&recv_msg,
|
|
0,
|
|
intf->channels[0].address,
|
|
intf->channels[0].lun,
|
|
0, 1); /* no retry, and no wait. */
|
|
}
|
|
intf->null_user_handler = NULL;
|
|
|
|
/*
|
|
* Validate the event receiver. The low bit must not
|
|
* be 1 (it must be a valid IPMB address), it cannot
|
|
* be zero, and it must not be my address.
|
|
*/
|
|
if (((intf->event_receiver & 1) == 0)
|
|
&& (intf->event_receiver != 0)
|
|
&& (intf->event_receiver != intf->channels[0].address)) {
|
|
/*
|
|
* The event receiver is valid, send an IPMB
|
|
* message.
|
|
*/
|
|
ipmb = (struct ipmi_ipmb_addr *) &addr;
|
|
ipmb->addr_type = IPMI_IPMB_ADDR_TYPE;
|
|
ipmb->channel = 0; /* FIXME - is this right? */
|
|
ipmb->lun = intf->event_receiver_lun;
|
|
ipmb->slave_addr = intf->event_receiver;
|
|
} else if (intf->local_sel_device) {
|
|
/*
|
|
* The event receiver was not valid (or was
|
|
* me), but I am an SEL device, just dump it
|
|
* in my SEL.
|
|
*/
|
|
si = (struct ipmi_system_interface_addr *) &addr;
|
|
si->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
|
|
si->channel = IPMI_BMC_CHANNEL;
|
|
si->lun = 0;
|
|
} else
|
|
continue; /* No where to send the event. */
|
|
|
|
msg.netfn = IPMI_NETFN_STORAGE_REQUEST; /* Storage. */
|
|
msg.cmd = IPMI_ADD_SEL_ENTRY_CMD;
|
|
msg.data = data;
|
|
msg.data_len = 16;
|
|
|
|
j = 0;
|
|
while (*p) {
|
|
int size = strlen(p);
|
|
|
|
if (size > 11)
|
|
size = 11;
|
|
data[0] = 0;
|
|
data[1] = 0;
|
|
data[2] = 0xf0; /* OEM event without timestamp. */
|
|
data[3] = intf->channels[0].address;
|
|
data[4] = j++; /* sequence # */
|
|
/*
|
|
* Always give 11 bytes, so strncpy will fill
|
|
* it with zeroes for me.
|
|
*/
|
|
strncpy(data+5, p, 11);
|
|
p += size;
|
|
|
|
i_ipmi_request(NULL,
|
|
intf,
|
|
&addr,
|
|
0,
|
|
&msg,
|
|
intf,
|
|
&smi_msg,
|
|
&recv_msg,
|
|
0,
|
|
intf->channels[0].address,
|
|
intf->channels[0].lun,
|
|
0, 1); /* no retry, and no wait. */
|
|
}
|
|
}
|
|
#endif /* CONFIG_IPMI_PANIC_STRING */
|
|
}
|
|
#endif /* CONFIG_IPMI_PANIC_EVENT */
|
|
|
|
static int has_panicked;
|
|
|
|
static int panic_event(struct notifier_block *this,
|
|
unsigned long event,
|
|
void *ptr)
|
|
{
|
|
ipmi_smi_t intf;
|
|
|
|
if (has_panicked)
|
|
return NOTIFY_DONE;
|
|
has_panicked = 1;
|
|
|
|
/* For every registered interface, set it to run to completion. */
|
|
list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
|
|
if (!intf->handlers)
|
|
/* Interface is not ready. */
|
|
continue;
|
|
|
|
intf->run_to_completion = 1;
|
|
intf->handlers->set_run_to_completion(intf->send_info, 1);
|
|
}
|
|
|
|
#ifdef CONFIG_IPMI_PANIC_EVENT
|
|
send_panic_events(ptr);
|
|
#endif
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block panic_block = {
|
|
.notifier_call = panic_event,
|
|
.next = NULL,
|
|
.priority = 200 /* priority: INT_MAX >= x >= 0 */
|
|
};
|
|
|
|
static int ipmi_init_msghandler(void)
|
|
{
|
|
int rv;
|
|
|
|
if (initialized)
|
|
return 0;
|
|
|
|
rv = driver_register(&ipmidriver);
|
|
if (rv) {
|
|
printk(KERN_ERR PFX "Could not register IPMI driver\n");
|
|
return rv;
|
|
}
|
|
|
|
printk(KERN_INFO "ipmi message handler version "
|
|
IPMI_DRIVER_VERSION "\n");
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
proc_ipmi_root = proc_mkdir("ipmi", NULL);
|
|
if (!proc_ipmi_root) {
|
|
printk(KERN_ERR PFX "Unable to create IPMI proc dir");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
proc_ipmi_root->owner = THIS_MODULE;
|
|
#endif /* CONFIG_PROC_FS */
|
|
|
|
setup_timer(&ipmi_timer, ipmi_timeout, 0);
|
|
mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
|
|
|
|
atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
|
|
|
|
initialized = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static __init int ipmi_init_msghandler_mod(void)
|
|
{
|
|
ipmi_init_msghandler();
|
|
return 0;
|
|
}
|
|
|
|
static __exit void cleanup_ipmi(void)
|
|
{
|
|
int count;
|
|
|
|
if (!initialized)
|
|
return;
|
|
|
|
atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block);
|
|
|
|
/*
|
|
* This can't be called if any interfaces exist, so no worry
|
|
* about shutting down the interfaces.
|
|
*/
|
|
|
|
/*
|
|
* Tell the timer to stop, then wait for it to stop. This
|
|
* avoids problems with race conditions removing the timer
|
|
* here.
|
|
*/
|
|
atomic_inc(&stop_operation);
|
|
del_timer_sync(&ipmi_timer);
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
remove_proc_entry(proc_ipmi_root->name, NULL);
|
|
#endif /* CONFIG_PROC_FS */
|
|
|
|
driver_unregister(&ipmidriver);
|
|
|
|
initialized = 0;
|
|
|
|
/* Check for buffer leaks. */
|
|
count = atomic_read(&smi_msg_inuse_count);
|
|
if (count != 0)
|
|
printk(KERN_WARNING PFX "SMI message count %d at exit\n",
|
|
count);
|
|
count = atomic_read(&recv_msg_inuse_count);
|
|
if (count != 0)
|
|
printk(KERN_WARNING PFX "recv message count %d at exit\n",
|
|
count);
|
|
}
|
|
module_exit(cleanup_ipmi);
|
|
|
|
module_init(ipmi_init_msghandler_mod);
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
|
|
MODULE_DESCRIPTION("Incoming and outgoing message routing for an IPMI"
|
|
" interface.");
|
|
MODULE_VERSION(IPMI_DRIVER_VERSION);
|