From: trenn@suse.de
To: minyard@acm.org
Cc: martin.wilck@ts.fujitsu.com, trenn@suse.de,
linux-kernel@vger.kernel.org,
openipmi-developer@lists.sourceforge.net
Subject: [patch 1/3] IPMI: Move/rename ipmi_msghandler.c to ipmi_handler.c
Date: Thu, 23 Oct 2014 13:09:25 +0200 [thread overview]
Message-ID: <20141023111307.275809784@ett.arch.suse.de> (raw)
In-Reply-To: <20141023110924.936986783@ett.arch.suse.de>
[-- Attachment #1: ipmi_move_msghandler.patch --]
[-- Type: text/plain, Size: 250093 bytes --]
No code change done.
This is necessary to compile ipmi_devintf.c into the ipmi_msghandler module
without renaming the module.
git history can still be obtained via:
git --follow drivers/char/ipmi/ipmi_handler.c
git blame drivers/char/ipmi/ipmi_handler.c still just works and also shows
modifications prior to the rename.
Signed-off-by: Thomas Renninger <trenn@suse.de>
CC: minyard@acm.org
CC: martin.wilck@ts.fujitsu.com
Index: kernel_ipmi/drivers/char/ipmi/Makefile
===================================================================
--- kernel_ipmi.orig/drivers/char/ipmi/Makefile
+++ kernel_ipmi/drivers/char/ipmi/Makefile
@@ -5,6 +5,8 @@
ipmi_si-y := ipmi_si_intf.o ipmi_kcs_sm.o ipmi_smic_sm.o ipmi_bt_sm.o
obj-$(CONFIG_IPMI_HANDLER) += ipmi_msghandler.o
+ipmi_msghandler-objs := ipmi_handler.o
+
obj-$(CONFIG_IPMI_DEVICE_INTERFACE) += ipmi_devintf.o
obj-$(CONFIG_IPMI_SI) += ipmi_si.o
obj-$(CONFIG_IPMI_WATCHDOG) += ipmi_watchdog.o
Index: kernel_ipmi/drivers/char/ipmi/ipmi_handler.c
===================================================================
--- /dev/null
+++ kernel_ipmi/drivers/char/ipmi/ipmi_handler.c
@@ -0,0 +1,4616 @@
+/*
+ * ipmi_msghandler.c
+ *
+ * Incoming and outgoing message routing for an IPMI interface.
+ *
+ * Author: MontaVista Software, Inc.
+ * Corey Minyard <minyard@mvista.com>
+ * source@mvista.com
+ *
+ * Copyright 2002 MontaVista Software Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/poll.h>
+#include <linux/sched.h>
+#include <linux/seq_file.h>
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/ipmi.h>
+#include <linux/ipmi_smi.h>
+#include <linux/notifier.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+#include <linux/rcupdate.h>
+#include <linux/interrupt.h>
+
+#define PFX "IPMI message handler: "
+
+#define IPMI_DRIVER_VERSION "39.2"
+
+static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void);
+static int ipmi_init_msghandler(void);
+static void smi_recv_tasklet(unsigned long);
+static void handle_new_recv_msgs(ipmi_smi_t intf);
+static void need_waiter(ipmi_smi_t intf);
+
+static int initialized;
+
+#ifdef CONFIG_PROC_FS
+static struct proc_dir_entry *proc_ipmi_root;
+#endif /* CONFIG_PROC_FS */
+
+/* Remain in auto-maintenance mode for this amount of time (in ms). */
+#define IPMI_MAINTENANCE_MODE_TIMEOUT 30000
+
+#define MAX_EVENTS_IN_QUEUE 25
+
+/*
+ * Don't let a message sit in a queue forever, always time it with at lest
+ * the max message timer. This is in milliseconds.
+ */
+#define MAX_MSG_TIMEOUT 60000
+
+/* Call every ~1000 ms. */
+#define IPMI_TIMEOUT_TIME 1000
+
+/* 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))
+
+/*
+ * The main "user" data structure.
+ */
+struct ipmi_user {
+ struct list_head link;
+
+ /* Set to false when the user is destroyed. */
+ bool valid;
+
+ struct kref refcount;
+
+ /* The upper layer that handles receive messages. */
+ struct ipmi_user_hndl *handler;
+ void *handler_data;
+
+ /* The interface this user is bound to. */
+ ipmi_smi_t intf;
+
+ /* Does this interface receive IPMI events? */
+ bool gets_events;
+};
+
+struct cmd_rcvr {
+ struct list_head link;
+
+ ipmi_user_t user;
+ unsigned char netfn;
+ unsigned char cmd;
+ unsigned int chans;
+
+ /*
+ * This is used to form a linked lised during mass deletion.
+ * Since this is in an RCU list, we cannot use the link above
+ * or change any data until the RCU period completes. So we
+ * use this next variable during mass deletion so we can have
+ * a list and don't have to wait and restart the search on
+ * every individual deletion of a command.
+ */
+ struct cmd_rcvr *next;
+};
+
+struct seq_table {
+ unsigned int inuse : 1;
+ unsigned int broadcast : 1;
+
+ unsigned long timeout;
+ unsigned long orig_timeout;
+ unsigned int retries_left;
+
+ /*
+ * To verify on an incoming send message response that this is
+ * the message that the response is for, we keep a sequence id
+ * and increment it every time we send a message.
+ */
+ long seqid;
+
+ /*
+ * This is held so we can properly respond to the message on a
+ * timeout, and it is used to hold the temporary data for
+ * retransmission, too.
+ */
+ struct ipmi_recv_msg *recv_msg;
+};
+
+/*
+ * Store the information in a msgid (long) to allow us to find a
+ * sequence table entry from the msgid.
+ */
+#define STORE_SEQ_IN_MSGID(seq, seqid) (((seq&0xff)<<26) | (seqid&0x3ffffff))
+
+#define GET_SEQ_FROM_MSGID(msgid, seq, seqid) \
+ do { \
+ seq = ((msgid >> 26) & 0x3f); \
+ seqid = (msgid & 0x3fffff); \
+ } while (0)
+
+#define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3fffff)
+
+struct ipmi_channel {
+ unsigned char medium;
+ unsigned char protocol;
+
+ /*
+ * My slave address. This is initialized to IPMI_BMC_SLAVE_ADDR,
+ * but may be changed by the user.
+ */
+ unsigned char address;
+
+ /*
+ * My LUN. This should generally stay the SMS LUN, but just in
+ * case...
+ */
+ unsigned char lun;
+};
+
+#ifdef CONFIG_PROC_FS
+struct ipmi_proc_entry {
+ char *name;
+ struct ipmi_proc_entry *next;
+};
+#endif
+
+struct bmc_device {
+ struct platform_device *dev;
+ struct ipmi_device_id id;
+ unsigned char guid[16];
+ int guid_set;
+
+ struct kref refcount;
+
+ /* bmc device attributes */
+ struct device_attribute device_id_attr;
+ struct device_attribute provides_dev_sdrs_attr;
+ struct device_attribute revision_attr;
+ struct device_attribute firmware_rev_attr;
+ struct device_attribute version_attr;
+ struct device_attribute add_dev_support_attr;
+ struct device_attribute manufacturer_id_attr;
+ struct device_attribute product_id_attr;
+ struct device_attribute guid_attr;
+ struct device_attribute aux_firmware_rev_attr;
+};
+
+/*
+ * Various statistics for IPMI, these index stats[] in the ipmi_smi
+ * structure.
+ */
+enum ipmi_stat_indexes {
+ /* Commands we got from the user that were invalid. */
+ IPMI_STAT_sent_invalid_commands = 0,
+
+ /* Commands we sent to the MC. */
+ IPMI_STAT_sent_local_commands,
+
+ /* Responses from the MC that were delivered to a user. */
+ IPMI_STAT_handled_local_responses,
+
+ /* Responses from the MC that were not delivered to a user. */
+ IPMI_STAT_unhandled_local_responses,
+
+ /* Commands we sent out to the IPMB bus. */
+ IPMI_STAT_sent_ipmb_commands,
+
+ /* Commands sent on the IPMB that had errors on the SEND CMD */
+ IPMI_STAT_sent_ipmb_command_errs,
+
+ /* Each retransmit increments this count. */
+ IPMI_STAT_retransmitted_ipmb_commands,
+
+ /*
+ * When a message times out (runs out of retransmits) this is
+ * incremented.
+ */
+ IPMI_STAT_timed_out_ipmb_commands,
+
+ /*
+ * This is like above, but for broadcasts. Broadcasts are
+ * *not* included in the above count (they are expected to
+ * time out).
+ */
+ IPMI_STAT_timed_out_ipmb_broadcasts,
+
+ /* Responses I have sent to the IPMB bus. */
+ IPMI_STAT_sent_ipmb_responses,
+
+ /* The response was delivered to the user. */
+ IPMI_STAT_handled_ipmb_responses,
+
+ /* The response had invalid data in it. */
+ IPMI_STAT_invalid_ipmb_responses,
+
+ /* The response didn't have anyone waiting for it. */
+ IPMI_STAT_unhandled_ipmb_responses,
+
+ /* Commands we sent out to the IPMB bus. */
+ IPMI_STAT_sent_lan_commands,
+
+ /* Commands sent on the IPMB that had errors on the SEND CMD */
+ IPMI_STAT_sent_lan_command_errs,
+
+ /* Each retransmit increments this count. */
+ IPMI_STAT_retransmitted_lan_commands,
+
+ /*
+ * When a message times out (runs out of retransmits) this is
+ * incremented.
+ */
+ IPMI_STAT_timed_out_lan_commands,
+
+ /* Responses I have sent to the IPMB bus. */
+ IPMI_STAT_sent_lan_responses,
+
+ /* The response was delivered to the user. */
+ IPMI_STAT_handled_lan_responses,
+
+ /* The response had invalid data in it. */
+ IPMI_STAT_invalid_lan_responses,
+
+ /* The response didn't have anyone waiting for it. */
+ IPMI_STAT_unhandled_lan_responses,
+
+ /* The command was delivered to the user. */
+ IPMI_STAT_handled_commands,
+
+ /* The command had invalid data in it. */
+ IPMI_STAT_invalid_commands,
+
+ /* The command didn't have anyone waiting for it. */
+ IPMI_STAT_unhandled_commands,
+
+ /* Invalid data in an event. */
+ IPMI_STAT_invalid_events,
+
+ /* Events that were received with the proper format. */
+ IPMI_STAT_events,
+
+ /* Retransmissions on IPMB that failed. */
+ IPMI_STAT_dropped_rexmit_ipmb_commands,
+
+ /* Retransmissions on LAN that failed. */
+ IPMI_STAT_dropped_rexmit_lan_commands,
+
+ /* This *must* remain last, add new values above this. */
+ IPMI_NUM_STATS
+};
+
+
+#define IPMI_IPMB_NUM_SEQ 64
+#define IPMI_MAX_CHANNELS 16
+struct ipmi_smi {
+ /* What interface number are we? */
+ int intf_num;
+
+ struct kref refcount;
+
+ /* Used for a list of interfaces. */
+ struct list_head link;
+
+ /*
+ * The list of upper layers that are using me. seq_lock
+ * protects this.
+ */
+ struct list_head users;
+
+ /* Information to supply to users. */
+ unsigned char ipmi_version_major;
+ unsigned char ipmi_version_minor;
+
+ /* Used for wake ups at startup. */
+ wait_queue_head_t waitq;
+
+ struct bmc_device *bmc;
+ char *my_dev_name;
+ char *sysfs_name;
+
+ /*
+ * This is the lower-layer's sender routine. Note that you
+ * must either be holding the ipmi_interfaces_mutex or be in
+ * an umpreemptible region to use this. You must fetch the
+ * value into a local variable and make sure it is not NULL.
+ */
+ struct ipmi_smi_handlers *handlers;
+ void *send_info;
+
+#ifdef CONFIG_PROC_FS
+ /* A list of proc entries for this interface. */
+ struct mutex proc_entry_lock;
+ struct ipmi_proc_entry *proc_entries;
+#endif
+
+ /* Driver-model device for the system interface. */
+ struct device *si_dev;
+
+ /*
+ * A table of sequence numbers for this interface. We use the
+ * sequence numbers for IPMB messages that go out of the
+ * interface to match them up with their responses. A routine
+ * is called periodically to time the items in this list.
+ */
+ spinlock_t seq_lock;
+ struct seq_table seq_table[IPMI_IPMB_NUM_SEQ];
+ int curr_seq;
+
+ /*
+ * Messages queued for delivery. If delivery fails (out of memory
+ * for instance), They will stay in here to be processed later in a
+ * periodic timer interrupt. The tasklet is for handling received
+ * messages directly from the handler.
+ */
+ spinlock_t waiting_msgs_lock;
+ struct list_head waiting_msgs;
+ atomic_t watchdog_pretimeouts_to_deliver;
+ struct tasklet_struct recv_tasklet;
+
+ /*
+ * The list of command receivers that are registered for commands
+ * on this interface.
+ */
+ struct mutex cmd_rcvrs_mutex;
+ struct list_head cmd_rcvrs;
+
+ /*
+ * Events that were queues because no one was there to receive
+ * them.
+ */
+ spinlock_t events_lock; /* For dealing with event stuff. */
+ struct list_head waiting_events;
+ unsigned int waiting_events_count; /* How many events in queue? */
+ char delivering_events;
+ char event_msg_printed;
+ atomic_t event_waiters;
+ unsigned int ticks_to_req_ev;
+ int last_needs_timer;
+
+ /*
+ * The event receiver for my BMC, only really used at panic
+ * shutdown as a place to store this.
+ */
+ unsigned char event_receiver;
+ unsigned char event_receiver_lun;
+ unsigned char local_sel_device;
+ unsigned char local_event_generator;
+
+ /* For handling of maintenance mode. */
+ int maintenance_mode;
+ bool maintenance_mode_enable;
+ int auto_maintenance_timeout;
+ spinlock_t maintenance_mode_lock; /* Used in a timer... */
+
+ /*
+ * A cheap hack, if this is non-null and a message to an
+ * interface comes in with a NULL user, call this routine with
+ * it. Note that the message will still be freed by the
+ * caller. This only works on the system interface.
+ */
+ void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_recv_msg *msg);
+
+ /*
+ * When we are scanning the channels for an SMI, this will
+ * tell which channel we are scanning.
+ */
+ int curr_channel;
+
+ /* Channel information */
+ struct ipmi_channel channels[IPMI_MAX_CHANNELS];
+
+ /* Proc FS stuff. */
+ struct proc_dir_entry *proc_dir;
+ char proc_dir_name[10];
+
+ atomic_t stats[IPMI_NUM_STATS];
+
+ /*
+ * run_to_completion duplicate of smb_info, smi_info
+ * and ipmi_serial_info structures. Used to decrease numbers of
+ * parameters passed by "low" level IPMI code.
+ */
+ int run_to_completion;
+};
+#define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev)
+
+/**
+ * The driver model view of the IPMI messaging driver.
+ */
+static struct platform_driver ipmidriver = {
+ .driver = {
+ .name = "ipmi",
+ .bus = &platform_bus_type
+ }
+};
+static DEFINE_MUTEX(ipmidriver_mutex);
+
+static LIST_HEAD(ipmi_interfaces);
+static DEFINE_MUTEX(ipmi_interfaces_mutex);
+
+/*
+ * List of watchers that want to know when smi's are added and deleted.
+ */
+static LIST_HEAD(smi_watchers);
+static DEFINE_MUTEX(smi_watchers_mutex);
+
+#define ipmi_inc_stat(intf, stat) \
+ atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat])
+#define ipmi_get_stat(intf, stat) \
+ ((unsigned int) atomic_read(&(intf)->stats[IPMI_STAT_ ## stat]))
+
+static int is_lan_addr(struct ipmi_addr *addr)
+{
+ return addr->addr_type == IPMI_LAN_ADDR_TYPE;
+}
+
+static int is_ipmb_addr(struct ipmi_addr *addr)
+{
+ return addr->addr_type == IPMI_IPMB_ADDR_TYPE;
+}
+
+static int is_ipmb_bcast_addr(struct ipmi_addr *addr)
+{
+ return addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE;
+}
+
+static void free_recv_msg_list(struct list_head *q)
+{
+ struct ipmi_recv_msg *msg, *msg2;
+
+ list_for_each_entry_safe(msg, msg2, q, link) {
+ list_del(&msg->link);
+ ipmi_free_recv_msg(msg);
+ }
+}
+
+static void free_smi_msg_list(struct list_head *q)
+{
+ struct ipmi_smi_msg *msg, *msg2;
+
+ list_for_each_entry_safe(msg, msg2, q, link) {
+ list_del(&msg->link);
+ ipmi_free_smi_msg(msg);
+ }
+}
+
+static void clean_up_interface_data(ipmi_smi_t intf)
+{
+ int i;
+ struct cmd_rcvr *rcvr, *rcvr2;
+ struct list_head list;
+
+ tasklet_kill(&intf->recv_tasklet);
+
+ free_smi_msg_list(&intf->waiting_msgs);
+ free_recv_msg_list(&intf->waiting_events);
+
+ /*
+ * Wholesale remove all the entries from the list in the
+ * interface and wait for RCU to know that none are in use.
+ */
+ mutex_lock(&intf->cmd_rcvrs_mutex);
+ INIT_LIST_HEAD(&list);
+ list_splice_init_rcu(&intf->cmd_rcvrs, &list, synchronize_rcu);
+ mutex_unlock(&intf->cmd_rcvrs_mutex);
+
+ list_for_each_entry_safe(rcvr, rcvr2, &list, link)
+ kfree(rcvr);
+
+ for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
+ if ((intf->seq_table[i].inuse)
+ && (intf->seq_table[i].recv_msg))
+ ipmi_free_recv_msg(intf->seq_table[i].recv_msg);
+ }
+}
+
+static void intf_free(struct kref *ref)
+{
+ ipmi_smi_t intf = container_of(ref, struct ipmi_smi, refcount);
+
+ clean_up_interface_data(intf);
+ kfree(intf);
+}
+
+struct watcher_entry {
+ int intf_num;
+ ipmi_smi_t intf;
+ struct list_head link;
+};
+
+int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher)
+{
+ ipmi_smi_t intf;
+ LIST_HEAD(to_deliver);
+ struct watcher_entry *e, *e2;
+
+ mutex_lock(&smi_watchers_mutex);
+
+ mutex_lock(&ipmi_interfaces_mutex);
+
+ /* Build a list of things to deliver. */
+ list_for_each_entry(intf, &ipmi_interfaces, link) {
+ if (intf->intf_num == -1)
+ continue;
+ e = kmalloc(sizeof(*e), GFP_KERNEL);
+ if (!e)
+ goto out_err;
+ kref_get(&intf->refcount);
+ e->intf = intf;
+ e->intf_num = intf->intf_num;
+ list_add_tail(&e->link, &to_deliver);
+ }
+
+ /* We will succeed, so add it to the list. */
+ list_add(&watcher->link, &smi_watchers);
+
+ mutex_unlock(&ipmi_interfaces_mutex);
+
+ list_for_each_entry_safe(e, e2, &to_deliver, link) {
+ list_del(&e->link);
+ watcher->new_smi(e->intf_num, e->intf->si_dev);
+ kref_put(&e->intf->refcount, intf_free);
+ 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 (is_ipmb_addr(addr1) || is_ipmb_bcast_addr(addr1)) {
+ 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 (is_lan_addr(addr1)) {
+ 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 (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) {
+ if (len < sizeof(struct ipmi_ipmb_addr))
+ return -EINVAL;
+ return 0;
+ }
+
+ if (is_lan_addr(addr)) {
+ 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;
+ need_waiter(intf);
+ } 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 = false;
+
+ 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 = true;
+ spin_lock_irqsave(&intf->seq_lock, flags);
+ list_add_rcu(&new_user->link, &intf->users);
+ spin_unlock_irqrestore(&intf->seq_lock, flags);
+ if (handler->ipmi_watchdog_pretimeout) {
+ /* User wants pretimeouts, so make sure to watch for them. */
+ if (atomic_inc_return(&intf->event_waiters) == 1)
+ need_waiter(intf);
+ }
+ *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);
+
+int ipmi_get_smi_info(int if_num, struct ipmi_smi_info *data)
+{
+ int rv = 0;
+ ipmi_smi_t intf;
+ struct ipmi_smi_handlers *handlers;
+
+ 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;
+ mutex_unlock(&ipmi_interfaces_mutex);
+ return rv;
+
+found:
+ handlers = intf->handlers;
+ rv = -ENOSYS;
+ if (handlers->get_smi_info)
+ rv = handlers->get_smi_info(intf->send_info, data);
+ mutex_unlock(&ipmi_interfaces_mutex);
+
+ return rv;
+}
+EXPORT_SYMBOL(ipmi_get_smi_info);
+
+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 = false;
+
+ if (user->handler->ipmi_watchdog_pretimeout)
+ atomic_dec(&intf->event_waiters);
+
+ if (user->gets_events)
+ atomic_dec(&intf->event_waiters);
+
+ /* 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_enable
+ = (intf->auto_maintenance_timeout > 0);
+ break;
+
+ case IPMI_MAINTENANCE_MODE_OFF:
+ intf->maintenance_mode_enable = false;
+ break;
+
+ case IPMI_MAINTENANCE_MODE_ON:
+ intf->maintenance_mode_enable = true;
+ break;
+
+ default:
+ rv = -EINVAL;
+ goto out_unlock;
+ }
+ intf->maintenance_mode = mode;
+
+ 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, bool 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);
+ if (user->gets_events == val)
+ goto out;
+
+ user->gets_events = val;
+
+ if (val) {
+ if (atomic_inc_return(&intf->event_waiters) == 1)
+ need_waiter(intf);
+ } else {
+ atomic_dec(&intf->event_waiters);
+ }
+
+ 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;
+ }
+
+ if (atomic_inc_return(&intf->event_waiters) == 1)
+ need_waiter(intf);
+
+ 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) {
+ atomic_dec(&intf->event_waiters);
+ 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 = true;
+ 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 (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) {
+ 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);
+
+ /*
+ * 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;
+ }
+
+ ipmi_inc_stat(intf, sent_ipmb_commands);
+
+ /*
+ * 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 (is_lan_addr(addr)) {
+ 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);
+
+ /*
+ * 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;
+ }
+
+ ipmi_inc_stat(intf, sent_lan_commands);
+
+ /*
+ * 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 = 0, lun = 0;
+ 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 = 0, lun = 0;
+ 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 smi_ipmb_proc_show(struct seq_file *m, void *v)
+{
+ ipmi_smi_t intf = m->private;
+ int i;
+
+ seq_printf(m, "%x", intf->channels[0].address);
+ for (i = 1; i < IPMI_MAX_CHANNELS; i++)
+ seq_printf(m, " %x", intf->channels[i].address);
+ return seq_putc(m, '\n');
+}
+
+static int smi_ipmb_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, smi_ipmb_proc_show, PDE_DATA(inode));
+}
+
+static const struct file_operations smi_ipmb_proc_ops = {
+ .open = smi_ipmb_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int smi_version_proc_show(struct seq_file *m, void *v)
+{
+ ipmi_smi_t intf = m->private;
+
+ return seq_printf(m, "%u.%u\n",
+ ipmi_version_major(&intf->bmc->id),
+ ipmi_version_minor(&intf->bmc->id));
+}
+
+static int smi_version_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, smi_version_proc_show, PDE_DATA(inode));
+}
+
+static const struct file_operations smi_version_proc_ops = {
+ .open = smi_version_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int smi_stats_proc_show(struct seq_file *m, void *v)
+{
+ ipmi_smi_t intf = m->private;
+
+ seq_printf(m, "sent_invalid_commands: %u\n",
+ ipmi_get_stat(intf, sent_invalid_commands));
+ seq_printf(m, "sent_local_commands: %u\n",
+ ipmi_get_stat(intf, sent_local_commands));
+ seq_printf(m, "handled_local_responses: %u\n",
+ ipmi_get_stat(intf, handled_local_responses));
+ seq_printf(m, "unhandled_local_responses: %u\n",
+ ipmi_get_stat(intf, unhandled_local_responses));
+ seq_printf(m, "sent_ipmb_commands: %u\n",
+ ipmi_get_stat(intf, sent_ipmb_commands));
+ seq_printf(m, "sent_ipmb_command_errs: %u\n",
+ ipmi_get_stat(intf, sent_ipmb_command_errs));
+ seq_printf(m, "retransmitted_ipmb_commands: %u\n",
+ ipmi_get_stat(intf, retransmitted_ipmb_commands));
+ seq_printf(m, "timed_out_ipmb_commands: %u\n",
+ ipmi_get_stat(intf, timed_out_ipmb_commands));
+ seq_printf(m, "timed_out_ipmb_broadcasts: %u\n",
+ ipmi_get_stat(intf, timed_out_ipmb_broadcasts));
+ seq_printf(m, "sent_ipmb_responses: %u\n",
+ ipmi_get_stat(intf, sent_ipmb_responses));
+ seq_printf(m, "handled_ipmb_responses: %u\n",
+ ipmi_get_stat(intf, handled_ipmb_responses));
+ seq_printf(m, "invalid_ipmb_responses: %u\n",
+ ipmi_get_stat(intf, invalid_ipmb_responses));
+ seq_printf(m, "unhandled_ipmb_responses: %u\n",
+ ipmi_get_stat(intf, unhandled_ipmb_responses));
+ seq_printf(m, "sent_lan_commands: %u\n",
+ ipmi_get_stat(intf, sent_lan_commands));
+ seq_printf(m, "sent_lan_command_errs: %u\n",
+ ipmi_get_stat(intf, sent_lan_command_errs));
+ seq_printf(m, "retransmitted_lan_commands: %u\n",
+ ipmi_get_stat(intf, retransmitted_lan_commands));
+ seq_printf(m, "timed_out_lan_commands: %u\n",
+ ipmi_get_stat(intf, timed_out_lan_commands));
+ seq_printf(m, "sent_lan_responses: %u\n",
+ ipmi_get_stat(intf, sent_lan_responses));
+ seq_printf(m, "handled_lan_responses: %u\n",
+ ipmi_get_stat(intf, handled_lan_responses));
+ seq_printf(m, "invalid_lan_responses: %u\n",
+ ipmi_get_stat(intf, invalid_lan_responses));
+ seq_printf(m, "unhandled_lan_responses: %u\n",
+ ipmi_get_stat(intf, unhandled_lan_responses));
+ seq_printf(m, "handled_commands: %u\n",
+ ipmi_get_stat(intf, handled_commands));
+ seq_printf(m, "invalid_commands: %u\n",
+ ipmi_get_stat(intf, invalid_commands));
+ seq_printf(m, "unhandled_commands: %u\n",
+ ipmi_get_stat(intf, unhandled_commands));
+ seq_printf(m, "invalid_events: %u\n",
+ ipmi_get_stat(intf, invalid_events));
+ seq_printf(m, "events: %u\n",
+ ipmi_get_stat(intf, events));
+ seq_printf(m, "failed rexmit LAN msgs: %u\n",
+ ipmi_get_stat(intf, dropped_rexmit_lan_commands));
+ seq_printf(m, "failed rexmit IPMB msgs: %u\n",
+ ipmi_get_stat(intf, dropped_rexmit_ipmb_commands));
+ return 0;
+}
+
+static int smi_stats_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, smi_stats_proc_show, PDE_DATA(inode));
+}
+
+static const struct file_operations smi_stats_proc_ops = {
+ .open = smi_stats_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+#endif /* CONFIG_PROC_FS */
+
+int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name,
+ const struct file_operations *proc_ops,
+ void *data)
+{
+ 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 = kstrdup(name, GFP_KERNEL);
+ if (!entry->name) {
+ kfree(entry);
+ return -ENOMEM;
+ }
+
+ file = proc_create_data(name, 0, smi->proc_dir, proc_ops, data);
+ if (!file) {
+ kfree(entry->name);
+ kfree(entry);
+ rv = -ENOMEM;
+ } else {
+ 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;
+
+ if (rv == 0)
+ rv = ipmi_smi_add_proc_entry(smi, "stats",
+ &smi_stats_proc_ops,
+ smi);
+
+ if (rv == 0)
+ rv = ipmi_smi_add_proc_entry(smi, "ipmb",
+ &smi_ipmb_proc_ops,
+ smi);
+
+ if (rv == 0)
+ rv = ipmi_smi_add_proc_entry(smi, "version",
+ &smi_version_proc_ops,
+ smi);
+#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;
+ sysfs_attr_init(&bmc->device_id_attr.attr);
+
+ 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;
+ sysfs_attr_init(&bmc->provides_dev_sdrs_attr.attr);
+
+ bmc->revision_attr.attr.name = "revision";
+ bmc->revision_attr.attr.mode = S_IRUGO;
+ bmc->revision_attr.show = revision_show;
+ sysfs_attr_init(&bmc->revision_attr.attr);
+
+ bmc->firmware_rev_attr.attr.name = "firmware_revision";
+ bmc->firmware_rev_attr.attr.mode = S_IRUGO;
+ bmc->firmware_rev_attr.show = firmware_rev_show;
+ sysfs_attr_init(&bmc->firmware_rev_attr.attr);
+
+ bmc->version_attr.attr.name = "ipmi_version";
+ bmc->version_attr.attr.mode = S_IRUGO;
+ bmc->version_attr.show = ipmi_version_show;
+ sysfs_attr_init(&bmc->version_attr.attr);
+
+ 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;
+ sysfs_attr_init(&bmc->add_dev_support_attr.attr);
+
+ bmc->manufacturer_id_attr.attr.name = "manufacturer_id";
+ bmc->manufacturer_id_attr.attr.mode = S_IRUGO;
+ bmc->manufacturer_id_attr.show = manufacturer_id_show;
+ sysfs_attr_init(&bmc->manufacturer_id_attr.attr);
+
+ bmc->product_id_attr.attr.name = "product_id";
+ bmc->product_id_attr.attr.mode = S_IRUGO;
+ bmc->product_id_attr.show = product_id_show;
+ sysfs_attr_init(&bmc->product_id_attr.attr);
+
+ bmc->guid_attr.attr.name = "guid";
+ bmc->guid_attr.attr.mode = S_IRUGO;
+ bmc->guid_attr.show = guid_show;
+ sysfs_attr_init(&bmc->guid_attr.attr);
+
+ 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;
+ sysfs_attr_init(&bmc->aux_firmware_rev_attr.attr);
+
+ 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.driver, bmc->guid);
+ else
+ old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver.driver,
+ 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.driver,
+ 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.driver;
+ 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;
+ }
+
+ dev_info(intf->si_dev, "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;
+}
+
+static void ipmi_poll(ipmi_smi_t intf)
+{
+ if (intf->handlers->poll)
+ intf->handlers->poll(intf->send_info);
+ /* In case something came in */
+ handle_new_recv_msgs(intf);
+}
+
+void ipmi_poll_interface(ipmi_user_t user)
+{
+ ipmi_poll(user->intf);
+}
+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);
+ tasklet_init(&intf->recv_tasklet,
+ smi_recv_tasklet,
+ (unsigned long) intf);
+ atomic_set(&intf->watchdog_pretimeouts_to_deliver, 0);
+ spin_lock_init(&intf->events_lock);
+ atomic_set(&intf->event_waiters, 0);
+ intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
+ 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;
+ intf->curr_channel = IPMI_MAX_CHANNELS;
+ }
+
+ 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;
+}
+
+/*
+ * This routine will handle "Get Message" command responses with
+ * channels that use an OEM Medium. The message format belongs to
+ * the OEM. See IPMI 2.0 specification, Chapter 6 and
+ * Chapter 22, sections 22.6 and 22.24 for more details.
+ */
+static int handle_oem_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_system_interface_addr *smi_addr;
+ struct ipmi_recv_msg *recv_msg;
+
+ /*
+ * We expect the OEM SW to perform error checking
+ * so we just do some basic sanity checks
+ */
+ if (msg->rsp_size < 4) {
+ /* 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;
+ }
+
+ /*
+ * This is an OEM Message so the OEM needs to know how
+ * handle the message. We do no interpretation.
+ */
+ netfn = msg->rsp[0] >> 2;
+ cmd = msg->rsp[1];
+ 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 {
+ /*
+ * OEM Messages are expected to be delivered via
+ * the system interface to SMS software. We might
+ * need to visit this again depending on OEM
+ * requirements
+ */
+ 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->user = user;
+ recv_msg->user_msg_data = NULL;
+ recv_msg->recv_type = IPMI_OEM_RECV_TYPE;
+ recv_msg->msg.netfn = msg->rsp[0] >> 2;
+ recv_msg->msg.cmd = msg->rsp[1];
+ recv_msg->msg.data = recv_msg->msg_data;
+
+ /*
+ * The message starts at byte 4 which follows the
+ * the Channel Byte in the "GET MESSAGE" command
+ */
+ recv_msg->msg.data_len = msg->rsp_size - 4;
+ memcpy(recv_msg->msg_data,
+ &(msg->rsp[4]),
+ msg->rsp_size - 4);
+ 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 received 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_one_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;
+ }
+
+ /*
+ * We need to make sure the channels have been initialized.
+ * The channel_handler routine will set the "curr_channel"
+ * equal to or greater than IPMI_MAX_CHANNELS when all the
+ * channels for this interface have been initialized.
+ */
+ if (intf->curr_channel < IPMI_MAX_CHANNELS) {
+ requeue = 0; /* Throw the message away */
+ 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:
+ /* Check for OEM Channels. Clients had better
+ register for these commands. */
+ if ((intf->channels[chan].medium
+ >= IPMI_CHANNEL_MEDIUM_OEM_MIN)
+ && (intf->channels[chan].medium
+ <= IPMI_CHANNEL_MEDIUM_OEM_MAX)) {
+ requeue = handle_oem_get_msg_cmd(intf, msg);
+ } else {
+ /*
+ * 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 asynchronous 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;
+}
+
+/*
+ * If there are messages in the queue or pretimeouts, handle them.
+ */
+static void handle_new_recv_msgs(ipmi_smi_t intf)
+{
+ struct ipmi_smi_msg *smi_msg;
+ unsigned long flags = 0;
+ int rv;
+ int run_to_completion = intf->run_to_completion;
+
+ /* See if any waiting messages need to be processed. */
+ if (!run_to_completion)
+ spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
+ while (!list_empty(&intf->waiting_msgs)) {
+ smi_msg = list_entry(intf->waiting_msgs.next,
+ struct ipmi_smi_msg, link);
+ list_del(&smi_msg->link);
+ if (!run_to_completion)
+ spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
+ rv = handle_one_recv_msg(intf, smi_msg);
+ if (!run_to_completion)
+ spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
+ if (rv == 0) {
+ /* Message handled */
+ ipmi_free_smi_msg(smi_msg);
+ } else if (rv < 0) {
+ /* Fatal error on the message, del but don't free. */
+ } else {
+ /*
+ * To preserve message order, quit if we
+ * can't handle a message.
+ */
+ list_add(&smi_msg->link, &intf->waiting_msgs);
+ break;
+ }
+ }
+ if (!run_to_completion)
+ spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
+
+ /*
+ * If the pretimout count is non-zero, decrement one from it and
+ * deliver pretimeouts to all the users.
+ */
+ if (atomic_add_unless(&intf->watchdog_pretimeouts_to_deliver, -1, 0)) {
+ ipmi_user_t user;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(user, &intf->users, link) {
+ if (user->handler->ipmi_watchdog_pretimeout)
+ user->handler->ipmi_watchdog_pretimeout(
+ user->handler_data);
+ }
+ rcu_read_unlock();
+ }
+}
+
+static void smi_recv_tasklet(unsigned long val)
+{
+ handle_new_recv_msgs((ipmi_smi_t) val);
+}
+
+/* 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 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);
+ list_add_tail(&msg->link, &intf->waiting_msgs);
+ if (!run_to_completion)
+ spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
+
+ tasklet_schedule(&intf->recv_tasklet);
+ out:
+ return;
+}
+EXPORT_SYMBOL(ipmi_smi_msg_received);
+
+void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf)
+{
+ atomic_set(&intf->watchdog_pretimeouts_to_deliver, 1);
+ tasklet_schedule(&intf->recv_tasklet);
+}
+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,
+ unsigned int *waiting_msgs)
+{
+ 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) {
+ (*waiting_msgs)++;
+ 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 (is_lan_addr(&ent->recv_msg->addr))
+ 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. */
+
+ (*waiting_msgs)++;
+
+ /*
+ * Start with the max timer, set to normal timer after
+ * the message is sent.
+ */
+ ent->timeout = MAX_MSG_TIMEOUT;
+ ent->retries_left--;
+ smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot,
+ ent->seqid);
+ if (!smi_msg) {
+ if (is_lan_addr(&ent->recv_msg->addr))
+ ipmi_inc_stat(intf,
+ dropped_rexmit_lan_commands);
+ else
+ ipmi_inc_stat(intf,
+ dropped_rexmit_ipmb_commands);
+ 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) {
+ if (is_lan_addr(&ent->recv_msg->addr))
+ ipmi_inc_stat(intf,
+ retransmitted_lan_commands);
+ else
+ ipmi_inc_stat(intf,
+ retransmitted_ipmb_commands);
+
+ intf->handlers->sender(intf->send_info,
+ smi_msg, 0);
+ } else
+ ipmi_free_smi_msg(smi_msg);
+
+ spin_lock_irqsave(&intf->seq_lock, *flags);
+ }
+}
+
+static unsigned int ipmi_timeout_handler(ipmi_smi_t intf, long timeout_period)
+{
+ struct list_head timeouts;
+ struct ipmi_recv_msg *msg, *msg2;
+ unsigned long flags;
+ int i;
+ unsigned int waiting_msgs = 0;
+
+ /*
+ * 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, &waiting_msgs);
+ 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 = false;
+ maintenance_mode_update(intf);
+ }
+ }
+ spin_unlock_irqrestore(&intf->maintenance_mode_lock,
+ flags);
+ }
+
+ tasklet_schedule(&intf->recv_tasklet);
+
+ return waiting_msgs;
+}
+
+static void ipmi_request_event(ipmi_smi_t intf)
+{
+ struct ipmi_smi_handlers *handlers;
+
+ /* No event requests when in maintenance mode. */
+ if (intf->maintenance_mode_enable)
+ return;
+
+ handlers = intf->handlers;
+ if (handlers)
+ handlers->request_events(intf->send_info);
+}
+
+static struct timer_list ipmi_timer;
+
+static atomic_t stop_operation;
+
+static void ipmi_timeout(unsigned long data)
+{
+ ipmi_smi_t intf;
+ int nt = 0;
+
+ if (atomic_read(&stop_operation))
+ return;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
+ int lnt = 0;
+
+ if (atomic_read(&intf->event_waiters)) {
+ intf->ticks_to_req_ev--;
+ if (intf->ticks_to_req_ev == 0) {
+ ipmi_request_event(intf);
+ intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
+ }
+ lnt++;
+ }
+
+ lnt += ipmi_timeout_handler(intf, IPMI_TIMEOUT_TIME);
+
+ lnt = !!lnt;
+ if (lnt != intf->last_needs_timer &&
+ intf->handlers->set_need_watch)
+ intf->handlers->set_need_watch(intf->send_info, lnt);
+ intf->last_needs_timer = lnt;
+
+ nt += lnt;
+ }
+ rcu_read_unlock();
+
+ if (nt)
+ mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
+}
+
+static void need_waiter(ipmi_smi_t intf)
+{
+ /* Racy, but worst case we start the timer twice. */
+ if (!timer_pending(&ipmi_timer))
+ 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 atomic_t panic_done_count = ATOMIC_INIT(0);
+
+static void dummy_smi_done_handler(struct ipmi_smi_msg *msg)
+{
+ atomic_dec(&panic_done_count);
+}
+
+static void dummy_recv_done_handler(struct ipmi_recv_msg *msg)
+{
+ atomic_dec(&panic_done_count);
+}
+
+/*
+ * Inside a panic, send a message and wait for a response.
+ */
+static void ipmi_panic_request_and_wait(ipmi_smi_t intf,
+ struct ipmi_addr *addr,
+ struct kernel_ipmi_msg *msg)
+{
+ struct ipmi_smi_msg smi_msg;
+ struct ipmi_recv_msg recv_msg;
+ int rv;
+
+ smi_msg.done = dummy_smi_done_handler;
+ recv_msg.done = dummy_recv_done_handler;
+ atomic_add(2, &panic_done_count);
+ rv = 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 (rv)
+ atomic_sub(2, &panic_done_count);
+ while (atomic_read(&panic_done_count) != 0)
+ ipmi_poll(intf);
+}
+
+#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;
+
+ 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];
+ }
+
+ /* 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);
+ ipmi_panic_request_and_wait(intf, &addr, &msg);
+ }
+
+#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;
+ ipmi_panic_request_and_wait(intf, &addr, &msg);
+
+ 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;
+ ipmi_panic_request_and_wait(intf, &addr, &msg);
+ }
+ 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;
+
+ ipmi_panic_request_and_wait(intf, &addr, &msg);
+ }
+ }
+#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.driver);
+ 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;
+ }
+
+#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 int __init ipmi_init_msghandler_mod(void)
+{
+ ipmi_init_msghandler();
+ return 0;
+}
+
+static void __exit 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
+ proc_remove(proc_ipmi_root);
+#endif /* CONFIG_PROC_FS */
+
+ driver_unregister(&ipmidriver.driver);
+
+ 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);
Index: kernel_ipmi/drivers/char/ipmi/ipmi_msghandler.c
===================================================================
--- kernel_ipmi.orig/drivers/char/ipmi/ipmi_msghandler.c
+++ /dev/null
@@ -1,4616 +0,0 @@
-/*
- * ipmi_msghandler.c
- *
- * Incoming and outgoing message routing for an IPMI interface.
- *
- * Author: MontaVista Software, Inc.
- * Corey Minyard <minyard@mvista.com>
- * source@mvista.com
- *
- * Copyright 2002 MontaVista Software Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/poll.h>
-#include <linux/sched.h>
-#include <linux/seq_file.h>
-#include <linux/spinlock.h>
-#include <linux/mutex.h>
-#include <linux/slab.h>
-#include <linux/ipmi.h>
-#include <linux/ipmi_smi.h>
-#include <linux/notifier.h>
-#include <linux/init.h>
-#include <linux/proc_fs.h>
-#include <linux/rcupdate.h>
-#include <linux/interrupt.h>
-
-#define PFX "IPMI message handler: "
-
-#define IPMI_DRIVER_VERSION "39.2"
-
-static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void);
-static int ipmi_init_msghandler(void);
-static void smi_recv_tasklet(unsigned long);
-static void handle_new_recv_msgs(ipmi_smi_t intf);
-static void need_waiter(ipmi_smi_t intf);
-
-static int initialized;
-
-#ifdef CONFIG_PROC_FS
-static struct proc_dir_entry *proc_ipmi_root;
-#endif /* CONFIG_PROC_FS */
-
-/* Remain in auto-maintenance mode for this amount of time (in ms). */
-#define IPMI_MAINTENANCE_MODE_TIMEOUT 30000
-
-#define MAX_EVENTS_IN_QUEUE 25
-
-/*
- * Don't let a message sit in a queue forever, always time it with at lest
- * the max message timer. This is in milliseconds.
- */
-#define MAX_MSG_TIMEOUT 60000
-
-/* Call every ~1000 ms. */
-#define IPMI_TIMEOUT_TIME 1000
-
-/* 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))
-
-/*
- * The main "user" data structure.
- */
-struct ipmi_user {
- struct list_head link;
-
- /* Set to false when the user is destroyed. */
- bool valid;
-
- struct kref refcount;
-
- /* The upper layer that handles receive messages. */
- struct ipmi_user_hndl *handler;
- void *handler_data;
-
- /* The interface this user is bound to. */
- ipmi_smi_t intf;
-
- /* Does this interface receive IPMI events? */
- bool gets_events;
-};
-
-struct cmd_rcvr {
- struct list_head link;
-
- ipmi_user_t user;
- unsigned char netfn;
- unsigned char cmd;
- unsigned int chans;
-
- /*
- * This is used to form a linked lised during mass deletion.
- * Since this is in an RCU list, we cannot use the link above
- * or change any data until the RCU period completes. So we
- * use this next variable during mass deletion so we can have
- * a list and don't have to wait and restart the search on
- * every individual deletion of a command.
- */
- struct cmd_rcvr *next;
-};
-
-struct seq_table {
- unsigned int inuse : 1;
- unsigned int broadcast : 1;
-
- unsigned long timeout;
- unsigned long orig_timeout;
- unsigned int retries_left;
-
- /*
- * To verify on an incoming send message response that this is
- * the message that the response is for, we keep a sequence id
- * and increment it every time we send a message.
- */
- long seqid;
-
- /*
- * This is held so we can properly respond to the message on a
- * timeout, and it is used to hold the temporary data for
- * retransmission, too.
- */
- struct ipmi_recv_msg *recv_msg;
-};
-
-/*
- * Store the information in a msgid (long) to allow us to find a
- * sequence table entry from the msgid.
- */
-#define STORE_SEQ_IN_MSGID(seq, seqid) (((seq&0xff)<<26) | (seqid&0x3ffffff))
-
-#define GET_SEQ_FROM_MSGID(msgid, seq, seqid) \
- do { \
- seq = ((msgid >> 26) & 0x3f); \
- seqid = (msgid & 0x3fffff); \
- } while (0)
-
-#define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3fffff)
-
-struct ipmi_channel {
- unsigned char medium;
- unsigned char protocol;
-
- /*
- * My slave address. This is initialized to IPMI_BMC_SLAVE_ADDR,
- * but may be changed by the user.
- */
- unsigned char address;
-
- /*
- * My LUN. This should generally stay the SMS LUN, but just in
- * case...
- */
- unsigned char lun;
-};
-
-#ifdef CONFIG_PROC_FS
-struct ipmi_proc_entry {
- char *name;
- struct ipmi_proc_entry *next;
-};
-#endif
-
-struct bmc_device {
- struct platform_device *dev;
- struct ipmi_device_id id;
- unsigned char guid[16];
- int guid_set;
-
- struct kref refcount;
-
- /* bmc device attributes */
- struct device_attribute device_id_attr;
- struct device_attribute provides_dev_sdrs_attr;
- struct device_attribute revision_attr;
- struct device_attribute firmware_rev_attr;
- struct device_attribute version_attr;
- struct device_attribute add_dev_support_attr;
- struct device_attribute manufacturer_id_attr;
- struct device_attribute product_id_attr;
- struct device_attribute guid_attr;
- struct device_attribute aux_firmware_rev_attr;
-};
-
-/*
- * Various statistics for IPMI, these index stats[] in the ipmi_smi
- * structure.
- */
-enum ipmi_stat_indexes {
- /* Commands we got from the user that were invalid. */
- IPMI_STAT_sent_invalid_commands = 0,
-
- /* Commands we sent to the MC. */
- IPMI_STAT_sent_local_commands,
-
- /* Responses from the MC that were delivered to a user. */
- IPMI_STAT_handled_local_responses,
-
- /* Responses from the MC that were not delivered to a user. */
- IPMI_STAT_unhandled_local_responses,
-
- /* Commands we sent out to the IPMB bus. */
- IPMI_STAT_sent_ipmb_commands,
-
- /* Commands sent on the IPMB that had errors on the SEND CMD */
- IPMI_STAT_sent_ipmb_command_errs,
-
- /* Each retransmit increments this count. */
- IPMI_STAT_retransmitted_ipmb_commands,
-
- /*
- * When a message times out (runs out of retransmits) this is
- * incremented.
- */
- IPMI_STAT_timed_out_ipmb_commands,
-
- /*
- * This is like above, but for broadcasts. Broadcasts are
- * *not* included in the above count (they are expected to
- * time out).
- */
- IPMI_STAT_timed_out_ipmb_broadcasts,
-
- /* Responses I have sent to the IPMB bus. */
- IPMI_STAT_sent_ipmb_responses,
-
- /* The response was delivered to the user. */
- IPMI_STAT_handled_ipmb_responses,
-
- /* The response had invalid data in it. */
- IPMI_STAT_invalid_ipmb_responses,
-
- /* The response didn't have anyone waiting for it. */
- IPMI_STAT_unhandled_ipmb_responses,
-
- /* Commands we sent out to the IPMB bus. */
- IPMI_STAT_sent_lan_commands,
-
- /* Commands sent on the IPMB that had errors on the SEND CMD */
- IPMI_STAT_sent_lan_command_errs,
-
- /* Each retransmit increments this count. */
- IPMI_STAT_retransmitted_lan_commands,
-
- /*
- * When a message times out (runs out of retransmits) this is
- * incremented.
- */
- IPMI_STAT_timed_out_lan_commands,
-
- /* Responses I have sent to the IPMB bus. */
- IPMI_STAT_sent_lan_responses,
-
- /* The response was delivered to the user. */
- IPMI_STAT_handled_lan_responses,
-
- /* The response had invalid data in it. */
- IPMI_STAT_invalid_lan_responses,
-
- /* The response didn't have anyone waiting for it. */
- IPMI_STAT_unhandled_lan_responses,
-
- /* The command was delivered to the user. */
- IPMI_STAT_handled_commands,
-
- /* The command had invalid data in it. */
- IPMI_STAT_invalid_commands,
-
- /* The command didn't have anyone waiting for it. */
- IPMI_STAT_unhandled_commands,
-
- /* Invalid data in an event. */
- IPMI_STAT_invalid_events,
-
- /* Events that were received with the proper format. */
- IPMI_STAT_events,
-
- /* Retransmissions on IPMB that failed. */
- IPMI_STAT_dropped_rexmit_ipmb_commands,
-
- /* Retransmissions on LAN that failed. */
- IPMI_STAT_dropped_rexmit_lan_commands,
-
- /* This *must* remain last, add new values above this. */
- IPMI_NUM_STATS
-};
-
-
-#define IPMI_IPMB_NUM_SEQ 64
-#define IPMI_MAX_CHANNELS 16
-struct ipmi_smi {
- /* What interface number are we? */
- int intf_num;
-
- struct kref refcount;
-
- /* Used for a list of interfaces. */
- struct list_head link;
-
- /*
- * The list of upper layers that are using me. seq_lock
- * protects this.
- */
- struct list_head users;
-
- /* Information to supply to users. */
- unsigned char ipmi_version_major;
- unsigned char ipmi_version_minor;
-
- /* Used for wake ups at startup. */
- wait_queue_head_t waitq;
-
- struct bmc_device *bmc;
- char *my_dev_name;
- char *sysfs_name;
-
- /*
- * This is the lower-layer's sender routine. Note that you
- * must either be holding the ipmi_interfaces_mutex or be in
- * an umpreemptible region to use this. You must fetch the
- * value into a local variable and make sure it is not NULL.
- */
- struct ipmi_smi_handlers *handlers;
- void *send_info;
-
-#ifdef CONFIG_PROC_FS
- /* A list of proc entries for this interface. */
- struct mutex proc_entry_lock;
- struct ipmi_proc_entry *proc_entries;
-#endif
-
- /* Driver-model device for the system interface. */
- struct device *si_dev;
-
- /*
- * A table of sequence numbers for this interface. We use the
- * sequence numbers for IPMB messages that go out of the
- * interface to match them up with their responses. A routine
- * is called periodically to time the items in this list.
- */
- spinlock_t seq_lock;
- struct seq_table seq_table[IPMI_IPMB_NUM_SEQ];
- int curr_seq;
-
- /*
- * Messages queued for delivery. If delivery fails (out of memory
- * for instance), They will stay in here to be processed later in a
- * periodic timer interrupt. The tasklet is for handling received
- * messages directly from the handler.
- */
- spinlock_t waiting_msgs_lock;
- struct list_head waiting_msgs;
- atomic_t watchdog_pretimeouts_to_deliver;
- struct tasklet_struct recv_tasklet;
-
- /*
- * The list of command receivers that are registered for commands
- * on this interface.
- */
- struct mutex cmd_rcvrs_mutex;
- struct list_head cmd_rcvrs;
-
- /*
- * Events that were queues because no one was there to receive
- * them.
- */
- spinlock_t events_lock; /* For dealing with event stuff. */
- struct list_head waiting_events;
- unsigned int waiting_events_count; /* How many events in queue? */
- char delivering_events;
- char event_msg_printed;
- atomic_t event_waiters;
- unsigned int ticks_to_req_ev;
- int last_needs_timer;
-
- /*
- * The event receiver for my BMC, only really used at panic
- * shutdown as a place to store this.
- */
- unsigned char event_receiver;
- unsigned char event_receiver_lun;
- unsigned char local_sel_device;
- unsigned char local_event_generator;
-
- /* For handling of maintenance mode. */
- int maintenance_mode;
- bool maintenance_mode_enable;
- int auto_maintenance_timeout;
- spinlock_t maintenance_mode_lock; /* Used in a timer... */
-
- /*
- * A cheap hack, if this is non-null and a message to an
- * interface comes in with a NULL user, call this routine with
- * it. Note that the message will still be freed by the
- * caller. This only works on the system interface.
- */
- void (*null_user_handler)(ipmi_smi_t intf, struct ipmi_recv_msg *msg);
-
- /*
- * When we are scanning the channels for an SMI, this will
- * tell which channel we are scanning.
- */
- int curr_channel;
-
- /* Channel information */
- struct ipmi_channel channels[IPMI_MAX_CHANNELS];
-
- /* Proc FS stuff. */
- struct proc_dir_entry *proc_dir;
- char proc_dir_name[10];
-
- atomic_t stats[IPMI_NUM_STATS];
-
- /*
- * run_to_completion duplicate of smb_info, smi_info
- * and ipmi_serial_info structures. Used to decrease numbers of
- * parameters passed by "low" level IPMI code.
- */
- int run_to_completion;
-};
-#define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev)
-
-/**
- * The driver model view of the IPMI messaging driver.
- */
-static struct platform_driver ipmidriver = {
- .driver = {
- .name = "ipmi",
- .bus = &platform_bus_type
- }
-};
-static DEFINE_MUTEX(ipmidriver_mutex);
-
-static LIST_HEAD(ipmi_interfaces);
-static DEFINE_MUTEX(ipmi_interfaces_mutex);
-
-/*
- * List of watchers that want to know when smi's are added and deleted.
- */
-static LIST_HEAD(smi_watchers);
-static DEFINE_MUTEX(smi_watchers_mutex);
-
-#define ipmi_inc_stat(intf, stat) \
- atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat])
-#define ipmi_get_stat(intf, stat) \
- ((unsigned int) atomic_read(&(intf)->stats[IPMI_STAT_ ## stat]))
-
-static int is_lan_addr(struct ipmi_addr *addr)
-{
- return addr->addr_type == IPMI_LAN_ADDR_TYPE;
-}
-
-static int is_ipmb_addr(struct ipmi_addr *addr)
-{
- return addr->addr_type == IPMI_IPMB_ADDR_TYPE;
-}
-
-static int is_ipmb_bcast_addr(struct ipmi_addr *addr)
-{
- return addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE;
-}
-
-static void free_recv_msg_list(struct list_head *q)
-{
- struct ipmi_recv_msg *msg, *msg2;
-
- list_for_each_entry_safe(msg, msg2, q, link) {
- list_del(&msg->link);
- ipmi_free_recv_msg(msg);
- }
-}
-
-static void free_smi_msg_list(struct list_head *q)
-{
- struct ipmi_smi_msg *msg, *msg2;
-
- list_for_each_entry_safe(msg, msg2, q, link) {
- list_del(&msg->link);
- ipmi_free_smi_msg(msg);
- }
-}
-
-static void clean_up_interface_data(ipmi_smi_t intf)
-{
- int i;
- struct cmd_rcvr *rcvr, *rcvr2;
- struct list_head list;
-
- tasklet_kill(&intf->recv_tasklet);
-
- free_smi_msg_list(&intf->waiting_msgs);
- free_recv_msg_list(&intf->waiting_events);
-
- /*
- * Wholesale remove all the entries from the list in the
- * interface and wait for RCU to know that none are in use.
- */
- mutex_lock(&intf->cmd_rcvrs_mutex);
- INIT_LIST_HEAD(&list);
- list_splice_init_rcu(&intf->cmd_rcvrs, &list, synchronize_rcu);
- mutex_unlock(&intf->cmd_rcvrs_mutex);
-
- list_for_each_entry_safe(rcvr, rcvr2, &list, link)
- kfree(rcvr);
-
- for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
- if ((intf->seq_table[i].inuse)
- && (intf->seq_table[i].recv_msg))
- ipmi_free_recv_msg(intf->seq_table[i].recv_msg);
- }
-}
-
-static void intf_free(struct kref *ref)
-{
- ipmi_smi_t intf = container_of(ref, struct ipmi_smi, refcount);
-
- clean_up_interface_data(intf);
- kfree(intf);
-}
-
-struct watcher_entry {
- int intf_num;
- ipmi_smi_t intf;
- struct list_head link;
-};
-
-int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher)
-{
- ipmi_smi_t intf;
- LIST_HEAD(to_deliver);
- struct watcher_entry *e, *e2;
-
- mutex_lock(&smi_watchers_mutex);
-
- mutex_lock(&ipmi_interfaces_mutex);
-
- /* Build a list of things to deliver. */
- list_for_each_entry(intf, &ipmi_interfaces, link) {
- if (intf->intf_num == -1)
- continue;
- e = kmalloc(sizeof(*e), GFP_KERNEL);
- if (!e)
- goto out_err;
- kref_get(&intf->refcount);
- e->intf = intf;
- e->intf_num = intf->intf_num;
- list_add_tail(&e->link, &to_deliver);
- }
-
- /* We will succeed, so add it to the list. */
- list_add(&watcher->link, &smi_watchers);
-
- mutex_unlock(&ipmi_interfaces_mutex);
-
- list_for_each_entry_safe(e, e2, &to_deliver, link) {
- list_del(&e->link);
- watcher->new_smi(e->intf_num, e->intf->si_dev);
- kref_put(&e->intf->refcount, intf_free);
- 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 (is_ipmb_addr(addr1) || is_ipmb_bcast_addr(addr1)) {
- 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 (is_lan_addr(addr1)) {
- 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 (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) {
- if (len < sizeof(struct ipmi_ipmb_addr))
- return -EINVAL;
- return 0;
- }
-
- if (is_lan_addr(addr)) {
- 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;
- need_waiter(intf);
- } 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 = false;
-
- 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 = true;
- spin_lock_irqsave(&intf->seq_lock, flags);
- list_add_rcu(&new_user->link, &intf->users);
- spin_unlock_irqrestore(&intf->seq_lock, flags);
- if (handler->ipmi_watchdog_pretimeout) {
- /* User wants pretimeouts, so make sure to watch for them. */
- if (atomic_inc_return(&intf->event_waiters) == 1)
- need_waiter(intf);
- }
- *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);
-
-int ipmi_get_smi_info(int if_num, struct ipmi_smi_info *data)
-{
- int rv = 0;
- ipmi_smi_t intf;
- struct ipmi_smi_handlers *handlers;
-
- 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;
- mutex_unlock(&ipmi_interfaces_mutex);
- return rv;
-
-found:
- handlers = intf->handlers;
- rv = -ENOSYS;
- if (handlers->get_smi_info)
- rv = handlers->get_smi_info(intf->send_info, data);
- mutex_unlock(&ipmi_interfaces_mutex);
-
- return rv;
-}
-EXPORT_SYMBOL(ipmi_get_smi_info);
-
-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 = false;
-
- if (user->handler->ipmi_watchdog_pretimeout)
- atomic_dec(&intf->event_waiters);
-
- if (user->gets_events)
- atomic_dec(&intf->event_waiters);
-
- /* 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_enable
- = (intf->auto_maintenance_timeout > 0);
- break;
-
- case IPMI_MAINTENANCE_MODE_OFF:
- intf->maintenance_mode_enable = false;
- break;
-
- case IPMI_MAINTENANCE_MODE_ON:
- intf->maintenance_mode_enable = true;
- break;
-
- default:
- rv = -EINVAL;
- goto out_unlock;
- }
- intf->maintenance_mode = mode;
-
- 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, bool 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);
- if (user->gets_events == val)
- goto out;
-
- user->gets_events = val;
-
- if (val) {
- if (atomic_inc_return(&intf->event_waiters) == 1)
- need_waiter(intf);
- } else {
- atomic_dec(&intf->event_waiters);
- }
-
- 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;
- }
-
- if (atomic_inc_return(&intf->event_waiters) == 1)
- need_waiter(intf);
-
- 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) {
- atomic_dec(&intf->event_waiters);
- 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 = true;
- 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 (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) {
- 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);
-
- /*
- * 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;
- }
-
- ipmi_inc_stat(intf, sent_ipmb_commands);
-
- /*
- * 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 (is_lan_addr(addr)) {
- 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);
-
- /*
- * 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;
- }
-
- ipmi_inc_stat(intf, sent_lan_commands);
-
- /*
- * 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 = 0, lun = 0;
- 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 = 0, lun = 0;
- 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 smi_ipmb_proc_show(struct seq_file *m, void *v)
-{
- ipmi_smi_t intf = m->private;
- int i;
-
- seq_printf(m, "%x", intf->channels[0].address);
- for (i = 1; i < IPMI_MAX_CHANNELS; i++)
- seq_printf(m, " %x", intf->channels[i].address);
- return seq_putc(m, '\n');
-}
-
-static int smi_ipmb_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, smi_ipmb_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations smi_ipmb_proc_ops = {
- .open = smi_ipmb_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int smi_version_proc_show(struct seq_file *m, void *v)
-{
- ipmi_smi_t intf = m->private;
-
- return seq_printf(m, "%u.%u\n",
- ipmi_version_major(&intf->bmc->id),
- ipmi_version_minor(&intf->bmc->id));
-}
-
-static int smi_version_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, smi_version_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations smi_version_proc_ops = {
- .open = smi_version_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int smi_stats_proc_show(struct seq_file *m, void *v)
-{
- ipmi_smi_t intf = m->private;
-
- seq_printf(m, "sent_invalid_commands: %u\n",
- ipmi_get_stat(intf, sent_invalid_commands));
- seq_printf(m, "sent_local_commands: %u\n",
- ipmi_get_stat(intf, sent_local_commands));
- seq_printf(m, "handled_local_responses: %u\n",
- ipmi_get_stat(intf, handled_local_responses));
- seq_printf(m, "unhandled_local_responses: %u\n",
- ipmi_get_stat(intf, unhandled_local_responses));
- seq_printf(m, "sent_ipmb_commands: %u\n",
- ipmi_get_stat(intf, sent_ipmb_commands));
- seq_printf(m, "sent_ipmb_command_errs: %u\n",
- ipmi_get_stat(intf, sent_ipmb_command_errs));
- seq_printf(m, "retransmitted_ipmb_commands: %u\n",
- ipmi_get_stat(intf, retransmitted_ipmb_commands));
- seq_printf(m, "timed_out_ipmb_commands: %u\n",
- ipmi_get_stat(intf, timed_out_ipmb_commands));
- seq_printf(m, "timed_out_ipmb_broadcasts: %u\n",
- ipmi_get_stat(intf, timed_out_ipmb_broadcasts));
- seq_printf(m, "sent_ipmb_responses: %u\n",
- ipmi_get_stat(intf, sent_ipmb_responses));
- seq_printf(m, "handled_ipmb_responses: %u\n",
- ipmi_get_stat(intf, handled_ipmb_responses));
- seq_printf(m, "invalid_ipmb_responses: %u\n",
- ipmi_get_stat(intf, invalid_ipmb_responses));
- seq_printf(m, "unhandled_ipmb_responses: %u\n",
- ipmi_get_stat(intf, unhandled_ipmb_responses));
- seq_printf(m, "sent_lan_commands: %u\n",
- ipmi_get_stat(intf, sent_lan_commands));
- seq_printf(m, "sent_lan_command_errs: %u\n",
- ipmi_get_stat(intf, sent_lan_command_errs));
- seq_printf(m, "retransmitted_lan_commands: %u\n",
- ipmi_get_stat(intf, retransmitted_lan_commands));
- seq_printf(m, "timed_out_lan_commands: %u\n",
- ipmi_get_stat(intf, timed_out_lan_commands));
- seq_printf(m, "sent_lan_responses: %u\n",
- ipmi_get_stat(intf, sent_lan_responses));
- seq_printf(m, "handled_lan_responses: %u\n",
- ipmi_get_stat(intf, handled_lan_responses));
- seq_printf(m, "invalid_lan_responses: %u\n",
- ipmi_get_stat(intf, invalid_lan_responses));
- seq_printf(m, "unhandled_lan_responses: %u\n",
- ipmi_get_stat(intf, unhandled_lan_responses));
- seq_printf(m, "handled_commands: %u\n",
- ipmi_get_stat(intf, handled_commands));
- seq_printf(m, "invalid_commands: %u\n",
- ipmi_get_stat(intf, invalid_commands));
- seq_printf(m, "unhandled_commands: %u\n",
- ipmi_get_stat(intf, unhandled_commands));
- seq_printf(m, "invalid_events: %u\n",
- ipmi_get_stat(intf, invalid_events));
- seq_printf(m, "events: %u\n",
- ipmi_get_stat(intf, events));
- seq_printf(m, "failed rexmit LAN msgs: %u\n",
- ipmi_get_stat(intf, dropped_rexmit_lan_commands));
- seq_printf(m, "failed rexmit IPMB msgs: %u\n",
- ipmi_get_stat(intf, dropped_rexmit_ipmb_commands));
- return 0;
-}
-
-static int smi_stats_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, smi_stats_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations smi_stats_proc_ops = {
- .open = smi_stats_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-#endif /* CONFIG_PROC_FS */
-
-int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name,
- const struct file_operations *proc_ops,
- void *data)
-{
- 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 = kstrdup(name, GFP_KERNEL);
- if (!entry->name) {
- kfree(entry);
- return -ENOMEM;
- }
-
- file = proc_create_data(name, 0, smi->proc_dir, proc_ops, data);
- if (!file) {
- kfree(entry->name);
- kfree(entry);
- rv = -ENOMEM;
- } else {
- 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;
-
- if (rv == 0)
- rv = ipmi_smi_add_proc_entry(smi, "stats",
- &smi_stats_proc_ops,
- smi);
-
- if (rv == 0)
- rv = ipmi_smi_add_proc_entry(smi, "ipmb",
- &smi_ipmb_proc_ops,
- smi);
-
- if (rv == 0)
- rv = ipmi_smi_add_proc_entry(smi, "version",
- &smi_version_proc_ops,
- smi);
-#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;
- sysfs_attr_init(&bmc->device_id_attr.attr);
-
- 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;
- sysfs_attr_init(&bmc->provides_dev_sdrs_attr.attr);
-
- bmc->revision_attr.attr.name = "revision";
- bmc->revision_attr.attr.mode = S_IRUGO;
- bmc->revision_attr.show = revision_show;
- sysfs_attr_init(&bmc->revision_attr.attr);
-
- bmc->firmware_rev_attr.attr.name = "firmware_revision";
- bmc->firmware_rev_attr.attr.mode = S_IRUGO;
- bmc->firmware_rev_attr.show = firmware_rev_show;
- sysfs_attr_init(&bmc->firmware_rev_attr.attr);
-
- bmc->version_attr.attr.name = "ipmi_version";
- bmc->version_attr.attr.mode = S_IRUGO;
- bmc->version_attr.show = ipmi_version_show;
- sysfs_attr_init(&bmc->version_attr.attr);
-
- 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;
- sysfs_attr_init(&bmc->add_dev_support_attr.attr);
-
- bmc->manufacturer_id_attr.attr.name = "manufacturer_id";
- bmc->manufacturer_id_attr.attr.mode = S_IRUGO;
- bmc->manufacturer_id_attr.show = manufacturer_id_show;
- sysfs_attr_init(&bmc->manufacturer_id_attr.attr);
-
- bmc->product_id_attr.attr.name = "product_id";
- bmc->product_id_attr.attr.mode = S_IRUGO;
- bmc->product_id_attr.show = product_id_show;
- sysfs_attr_init(&bmc->product_id_attr.attr);
-
- bmc->guid_attr.attr.name = "guid";
- bmc->guid_attr.attr.mode = S_IRUGO;
- bmc->guid_attr.show = guid_show;
- sysfs_attr_init(&bmc->guid_attr.attr);
-
- 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;
- sysfs_attr_init(&bmc->aux_firmware_rev_attr.attr);
-
- 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.driver, bmc->guid);
- else
- old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver.driver,
- 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.driver,
- 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.driver;
- 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;
- }
-
- dev_info(intf->si_dev, "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;
-}
-
-static void ipmi_poll(ipmi_smi_t intf)
-{
- if (intf->handlers->poll)
- intf->handlers->poll(intf->send_info);
- /* In case something came in */
- handle_new_recv_msgs(intf);
-}
-
-void ipmi_poll_interface(ipmi_user_t user)
-{
- ipmi_poll(user->intf);
-}
-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);
- tasklet_init(&intf->recv_tasklet,
- smi_recv_tasklet,
- (unsigned long) intf);
- atomic_set(&intf->watchdog_pretimeouts_to_deliver, 0);
- spin_lock_init(&intf->events_lock);
- atomic_set(&intf->event_waiters, 0);
- intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
- 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;
- intf->curr_channel = IPMI_MAX_CHANNELS;
- }
-
- 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;
-}
-
-/*
- * This routine will handle "Get Message" command responses with
- * channels that use an OEM Medium. The message format belongs to
- * the OEM. See IPMI 2.0 specification, Chapter 6 and
- * Chapter 22, sections 22.6 and 22.24 for more details.
- */
-static int handle_oem_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_system_interface_addr *smi_addr;
- struct ipmi_recv_msg *recv_msg;
-
- /*
- * We expect the OEM SW to perform error checking
- * so we just do some basic sanity checks
- */
- if (msg->rsp_size < 4) {
- /* 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;
- }
-
- /*
- * This is an OEM Message so the OEM needs to know how
- * handle the message. We do no interpretation.
- */
- netfn = msg->rsp[0] >> 2;
- cmd = msg->rsp[1];
- 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 {
- /*
- * OEM Messages are expected to be delivered via
- * the system interface to SMS software. We might
- * need to visit this again depending on OEM
- * requirements
- */
- 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->user = user;
- recv_msg->user_msg_data = NULL;
- recv_msg->recv_type = IPMI_OEM_RECV_TYPE;
- recv_msg->msg.netfn = msg->rsp[0] >> 2;
- recv_msg->msg.cmd = msg->rsp[1];
- recv_msg->msg.data = recv_msg->msg_data;
-
- /*
- * The message starts at byte 4 which follows the
- * the Channel Byte in the "GET MESSAGE" command
- */
- recv_msg->msg.data_len = msg->rsp_size - 4;
- memcpy(recv_msg->msg_data,
- &(msg->rsp[4]),
- msg->rsp_size - 4);
- 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 received 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_one_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;
- }
-
- /*
- * We need to make sure the channels have been initialized.
- * The channel_handler routine will set the "curr_channel"
- * equal to or greater than IPMI_MAX_CHANNELS when all the
- * channels for this interface have been initialized.
- */
- if (intf->curr_channel < IPMI_MAX_CHANNELS) {
- requeue = 0; /* Throw the message away */
- 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:
- /* Check for OEM Channels. Clients had better
- register for these commands. */
- if ((intf->channels[chan].medium
- >= IPMI_CHANNEL_MEDIUM_OEM_MIN)
- && (intf->channels[chan].medium
- <= IPMI_CHANNEL_MEDIUM_OEM_MAX)) {
- requeue = handle_oem_get_msg_cmd(intf, msg);
- } else {
- /*
- * 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 asynchronous 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;
-}
-
-/*
- * If there are messages in the queue or pretimeouts, handle them.
- */
-static void handle_new_recv_msgs(ipmi_smi_t intf)
-{
- struct ipmi_smi_msg *smi_msg;
- unsigned long flags = 0;
- int rv;
- int run_to_completion = intf->run_to_completion;
-
- /* See if any waiting messages need to be processed. */
- if (!run_to_completion)
- spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
- while (!list_empty(&intf->waiting_msgs)) {
- smi_msg = list_entry(intf->waiting_msgs.next,
- struct ipmi_smi_msg, link);
- list_del(&smi_msg->link);
- if (!run_to_completion)
- spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
- rv = handle_one_recv_msg(intf, smi_msg);
- if (!run_to_completion)
- spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
- if (rv == 0) {
- /* Message handled */
- ipmi_free_smi_msg(smi_msg);
- } else if (rv < 0) {
- /* Fatal error on the message, del but don't free. */
- } else {
- /*
- * To preserve message order, quit if we
- * can't handle a message.
- */
- list_add(&smi_msg->link, &intf->waiting_msgs);
- break;
- }
- }
- if (!run_to_completion)
- spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
-
- /*
- * If the pretimout count is non-zero, decrement one from it and
- * deliver pretimeouts to all the users.
- */
- if (atomic_add_unless(&intf->watchdog_pretimeouts_to_deliver, -1, 0)) {
- ipmi_user_t user;
-
- rcu_read_lock();
- list_for_each_entry_rcu(user, &intf->users, link) {
- if (user->handler->ipmi_watchdog_pretimeout)
- user->handler->ipmi_watchdog_pretimeout(
- user->handler_data);
- }
- rcu_read_unlock();
- }
-}
-
-static void smi_recv_tasklet(unsigned long val)
-{
- handle_new_recv_msgs((ipmi_smi_t) val);
-}
-
-/* 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 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);
- list_add_tail(&msg->link, &intf->waiting_msgs);
- if (!run_to_completion)
- spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
-
- tasklet_schedule(&intf->recv_tasklet);
- out:
- return;
-}
-EXPORT_SYMBOL(ipmi_smi_msg_received);
-
-void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf)
-{
- atomic_set(&intf->watchdog_pretimeouts_to_deliver, 1);
- tasklet_schedule(&intf->recv_tasklet);
-}
-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,
- unsigned int *waiting_msgs)
-{
- 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) {
- (*waiting_msgs)++;
- 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 (is_lan_addr(&ent->recv_msg->addr))
- 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. */
-
- (*waiting_msgs)++;
-
- /*
- * Start with the max timer, set to normal timer after
- * the message is sent.
- */
- ent->timeout = MAX_MSG_TIMEOUT;
- ent->retries_left--;
- smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot,
- ent->seqid);
- if (!smi_msg) {
- if (is_lan_addr(&ent->recv_msg->addr))
- ipmi_inc_stat(intf,
- dropped_rexmit_lan_commands);
- else
- ipmi_inc_stat(intf,
- dropped_rexmit_ipmb_commands);
- 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) {
- if (is_lan_addr(&ent->recv_msg->addr))
- ipmi_inc_stat(intf,
- retransmitted_lan_commands);
- else
- ipmi_inc_stat(intf,
- retransmitted_ipmb_commands);
-
- intf->handlers->sender(intf->send_info,
- smi_msg, 0);
- } else
- ipmi_free_smi_msg(smi_msg);
-
- spin_lock_irqsave(&intf->seq_lock, *flags);
- }
-}
-
-static unsigned int ipmi_timeout_handler(ipmi_smi_t intf, long timeout_period)
-{
- struct list_head timeouts;
- struct ipmi_recv_msg *msg, *msg2;
- unsigned long flags;
- int i;
- unsigned int waiting_msgs = 0;
-
- /*
- * 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, &waiting_msgs);
- 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 = false;
- maintenance_mode_update(intf);
- }
- }
- spin_unlock_irqrestore(&intf->maintenance_mode_lock,
- flags);
- }
-
- tasklet_schedule(&intf->recv_tasklet);
-
- return waiting_msgs;
-}
-
-static void ipmi_request_event(ipmi_smi_t intf)
-{
- struct ipmi_smi_handlers *handlers;
-
- /* No event requests when in maintenance mode. */
- if (intf->maintenance_mode_enable)
- return;
-
- handlers = intf->handlers;
- if (handlers)
- handlers->request_events(intf->send_info);
-}
-
-static struct timer_list ipmi_timer;
-
-static atomic_t stop_operation;
-
-static void ipmi_timeout(unsigned long data)
-{
- ipmi_smi_t intf;
- int nt = 0;
-
- if (atomic_read(&stop_operation))
- return;
-
- rcu_read_lock();
- list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
- int lnt = 0;
-
- if (atomic_read(&intf->event_waiters)) {
- intf->ticks_to_req_ev--;
- if (intf->ticks_to_req_ev == 0) {
- ipmi_request_event(intf);
- intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
- }
- lnt++;
- }
-
- lnt += ipmi_timeout_handler(intf, IPMI_TIMEOUT_TIME);
-
- lnt = !!lnt;
- if (lnt != intf->last_needs_timer &&
- intf->handlers->set_need_watch)
- intf->handlers->set_need_watch(intf->send_info, lnt);
- intf->last_needs_timer = lnt;
-
- nt += lnt;
- }
- rcu_read_unlock();
-
- if (nt)
- mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
-}
-
-static void need_waiter(ipmi_smi_t intf)
-{
- /* Racy, but worst case we start the timer twice. */
- if (!timer_pending(&ipmi_timer))
- 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 atomic_t panic_done_count = ATOMIC_INIT(0);
-
-static void dummy_smi_done_handler(struct ipmi_smi_msg *msg)
-{
- atomic_dec(&panic_done_count);
-}
-
-static void dummy_recv_done_handler(struct ipmi_recv_msg *msg)
-{
- atomic_dec(&panic_done_count);
-}
-
-/*
- * Inside a panic, send a message and wait for a response.
- */
-static void ipmi_panic_request_and_wait(ipmi_smi_t intf,
- struct ipmi_addr *addr,
- struct kernel_ipmi_msg *msg)
-{
- struct ipmi_smi_msg smi_msg;
- struct ipmi_recv_msg recv_msg;
- int rv;
-
- smi_msg.done = dummy_smi_done_handler;
- recv_msg.done = dummy_recv_done_handler;
- atomic_add(2, &panic_done_count);
- rv = 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 (rv)
- atomic_sub(2, &panic_done_count);
- while (atomic_read(&panic_done_count) != 0)
- ipmi_poll(intf);
-}
-
-#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;
-
- 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];
- }
-
- /* 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);
- ipmi_panic_request_and_wait(intf, &addr, &msg);
- }
-
-#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;
- ipmi_panic_request_and_wait(intf, &addr, &msg);
-
- 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;
- ipmi_panic_request_and_wait(intf, &addr, &msg);
- }
- 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;
-
- ipmi_panic_request_and_wait(intf, &addr, &msg);
- }
- }
-#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.driver);
- 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;
- }
-
-#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 int __init ipmi_init_msghandler_mod(void)
-{
- ipmi_init_msghandler();
- return 0;
-}
-
-static void __exit 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
- proc_remove(proc_ipmi_root);
-#endif /* CONFIG_PROC_FS */
-
- driver_unregister(&ipmidriver.driver);
-
- 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);
next prev parent reply other threads:[~2014-10-23 11:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-23 11:09 [patch 0/3] Compile ipmi_devintf into ipmi_msghandler trenn
2014-10-23 11:09 ` trenn [this message]
2014-10-23 11:09 ` [patch 2/3] ipmi: Setup ipmi_devintf automatically if ipmi_msghandler gets loaded trenn
2014-10-23 11:09 ` [patch 3/3] ipmi: Remove ipmi_major module parameter trenn
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