* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <asm/system.h>
-#include <linux/sched.h>
#include <linux/poll.h>
#include <linux/spinlock.h>
-#include <linux/rwsem.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>
#define PFX "IPMI message handler: "
-#define IPMI_DRIVER_VERSION "36.0"
+#define IPMI_DRIVER_VERSION "39.1"
static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void);
static int ipmi_init_msghandler(void);
-static int initialized = 0;
+static int initialized;
#ifdef CONFIG_PROC_FS
-struct proc_dir_entry *proc_ipmi_root = NULL;
+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
+
+/*
+ * The main "user" data structure.
+ */
struct ipmi_user
{
struct list_head link;
+ /* Set to "0" when the user is destroyed. */
+ int valid;
+
+ struct kref refcount;
+
/* The upper layer that handles receive messages. */
struct ipmi_user_hndl *handler;
void *handler_data;
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
};
#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;
+};
+
#define IPMI_IPMB_NUM_SEQ 64
#define IPMI_MAX_CHANNELS 16
struct ipmi_smi
/* What interface number are we? */
int intf_num;
- /* The list of upper layers that are using me. We read-lock
- this when delivering messages to the upper layer to keep
- the user from going away while we are processing the
- message. This means that you cannot add or delete a user
- from the receive callback. */
- rwlock_t users_lock;
- struct list_head users;
+ 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;
- /* The IPMI version of the BMC on the other end. */
- unsigned char version_major;
- unsigned char version_minor;
+ struct bmc_device *bmc;
+ char *my_dev_name;
+ char *sysfs_name;
- /* This is the lower-layer's sender routine. */
+ /* 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;
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
/* The list of command receivers that are registered for commands
on this interface. */
- rwlock_t cmd_rcvr_lock;
+ struct mutex cmd_rcvrs_mutex;
struct list_head cmd_rcvrs;
/* Events that were queues because no one was there to receive
spinlock_t events_lock; /* For dealing with event stuff. */
struct list_head waiting_events;
unsigned int waiting_events_count; /* How many events in queue? */
+ int delivering_events;
/* The event receiver for my BMC, only really used at panic
shutdown as a place to store this. */
unsigned char local_sel_device;
unsigned char local_event_generator;
+ /* For handling of maintenance mode. */
+ int maintenance_mode;
+ int 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
/* Events that were received with the proper format. */
unsigned int events;
};
+#define to_si_intf_from_dev(device) container_of(device, struct ipmi_smi, dev)
-#define MAX_IPMI_INTERFACES 4
-static ipmi_smi_t ipmi_interfaces[MAX_IPMI_INTERFACES];
-
-/* Used to keep interfaces from going away while operations are
- operating on interfaces. Grab read if you are not modifying the
- interfaces, write if you are. */
-static DECLARE_RWSEM(interfaces_sem);
+/**
+ * The driver model view of the IPMI messaging driver.
+ */
+static struct device_driver ipmidriver = {
+ .name = "ipmi",
+ .bus = &platform_bus_type
+};
+static DEFINE_MUTEX(ipmidriver_mutex);
-/* Directly protects the ipmi_interfaces data structure. This is
- claimed in the timer interrupt. */
-static DEFINE_SPINLOCK(interfaces_lock);
+static struct list_head ipmi_interfaces = LIST_HEAD_INIT(ipmi_interfaces);
+static DEFINE_MUTEX(ipmi_interfaces_mutex);
/* List of watchers that want to know when smi's are added and
deleted. */
static struct list_head smi_watchers = LIST_HEAD_INIT(smi_watchers);
-static DECLARE_RWSEM(smi_watchers_sem);
+static DEFINE_MUTEX(smi_watchers_mutex);
-int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher)
+
+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;
+ int i;
+ struct cmd_rcvr *rcvr, *rcvr2;
+ struct list_head list;
+
+ 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);
- down_read(&interfaces_sem);
- down_write(&smi_watchers_sem);
- list_add(&(watcher->link), &smi_watchers);
- for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
- if (ipmi_interfaces[i] != NULL) {
- watcher->new_smi(i);
+ 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);
}
}
- up_write(&smi_watchers_sem);
- up_read(&interfaces_sem);
+}
+
+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;
+ struct list_head to_deliver = LIST_HEAD_INIT(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;
}
int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher)
{
- down_write(&smi_watchers_sem);
+ mutex_lock(&smi_watchers_mutex);
list_del(&(watcher->link));
- up_write(&smi_watchers_sem);
+ mutex_unlock(&smi_watchers_mutex);
return 0;
}
+/*
+ * Must be called with smi_watchers_mutex held.
+ */
static void
-call_smi_watchers(int i)
+call_smi_watchers(int i, struct device *dev)
{
struct ipmi_smi_watcher *w;
- down_read(&smi_watchers_sem);
list_for_each_entry(w, &smi_watchers, link) {
if (try_module_get(w->owner)) {
- w->new_smi(i);
+ w->new_smi(i, dev);
module_put(w->owner);
}
}
- up_read(&smi_watchers_sem);
}
static int
}
if ((addr->channel == IPMI_BMC_CHANNEL)
- || (addr->channel >= IPMI_NUM_CHANNELS)
+ || (addr->channel >= IPMI_MAX_CHANNELS)
|| (addr->channel < 0))
return -EINVAL;
static void deliver_response(struct ipmi_recv_msg *msg)
{
- if (! msg->user) {
+ if (!msg->user) {
ipmi_smi_t intf = msg->user_msg_data;
unsigned long flags;
}
ipmi_free_recv_msg(msg);
} else {
- msg->user->handler->ipmi_recv_hndl(msg,
- msg->user->handler_data);
+ 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. */
(i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq;
i = (i+1)%IPMI_IPMB_NUM_SEQ)
{
- if (! intf->seq_table[i].inuse)
+ if (!intf->seq_table[i].inuse)
break;
}
- if (! intf->seq_table[i].inuse) {
+ if (!intf->seq_table[i].inuse) {
intf->seq_table[i].recv_msg = recv_msg;
/* Start with the maximum timeout, when the send response
}
spin_unlock_irqrestore(&(intf->seq_lock), flags);
- if (msg) {
- 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);
- }
+ if (msg)
+ deliver_err_response(msg, err);
return rv;
}
}
new_user = kmalloc(sizeof(*new_user), GFP_KERNEL);
- if (! new_user)
+ if (!new_user)
return -ENOMEM;
- down_read(&interfaces_sem);
- if ((if_num >= MAX_IPMI_INTERFACES) || ipmi_interfaces[if_num] == NULL)
- {
- rv = -EINVAL;
- goto out_unlock;
+ 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;
- intf = ipmi_interfaces[if_num];
+ 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;
if (!try_module_get(intf->handlers->owner)) {
rv = -ENODEV;
- goto out_unlock;
+ 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_unlock;
+ goto out_kref;
}
}
- write_lock_irqsave(&intf->users_lock, flags);
- list_add_tail(&new_user->link, &intf->users);
- write_unlock_irqrestore(&intf->users_lock, flags);
+ /* Hold the lock so intf->handlers is guaranteed to be good
+ * until now */
+ mutex_unlock(&ipmi_interfaces_mutex);
- out_unlock:
- if (rv) {
- kfree(new_user);
- } else {
- *user = new_user;
- }
+ new_user->valid = 1;
+ spin_lock_irqsave(&intf->seq_lock, flags);
+ list_add_rcu(&new_user->link, &intf->users);
+ spin_unlock_irqrestore(&intf->seq_lock, flags);
+ *user = new_user;
+ return 0;
- up_read(&interfaces_sem);
+out_kref:
+ kref_put(&intf->refcount, intf_free);
+out_kfree:
+ mutex_unlock(&ipmi_interfaces_mutex);
+ kfree(new_user);
return rv;
}
-static int ipmi_destroy_user_nolock(ipmi_user_t user)
+static void free_user(struct kref *ref)
{
- int rv = -ENODEV;
- ipmi_user_t t_user;
- struct cmd_rcvr *rcvr, *rcvr2;
+ 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;
- /* Find the user and delete them from the list. */
- list_for_each_entry(t_user, &(user->intf->users), link) {
- if (t_user == user) {
- list_del(&t_user->link);
- rv = 0;
- break;
- }
- }
+ user->valid = 0;
- if (rv) {
- goto out_unlock;
- }
+ /* Remove the user from the interface's sequence table. */
+ spin_lock_irqsave(&intf->seq_lock, flags);
+ list_del_rcu(&user->link);
- /* Remove the user from the interfaces sequence table. */
- spin_lock_irqsave(&(user->intf->seq_lock), flags);
for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
- if (user->intf->seq_table[i].inuse
- && (user->intf->seq_table[i].recv_msg->user == user))
+ if (intf->seq_table[i].inuse
+ && (intf->seq_table[i].recv_msg->user == user))
{
- user->intf->seq_table[i].inuse = 0;
+ intf->seq_table[i].inuse = 0;
+ ipmi_free_recv_msg(intf->seq_table[i].recv_msg);
}
}
- spin_unlock_irqrestore(&(user->intf->seq_lock), flags);
-
- /* Remove the user from the command receiver's table. */
- write_lock_irqsave(&(user->intf->cmd_rcvr_lock), flags);
- list_for_each_entry_safe(rcvr, rcvr2, &(user->intf->cmd_rcvrs), link) {
+ 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(&rcvr->link);
- kfree(rcvr);
+ list_del_rcu(&rcvr->link);
+ rcvr->next = rcvrs;
+ rcvrs = rcvr;
}
}
- write_unlock_irqrestore(&(user->intf->cmd_rcvr_lock), flags);
-
- kfree(user);
-
- out_unlock:
-
- return rv;
-}
-
-int ipmi_destroy_user(ipmi_user_t user)
-{
- int rv;
- ipmi_smi_t intf = user->intf;
- unsigned long flags;
+ mutex_unlock(&intf->cmd_rcvrs_mutex);
+ synchronize_rcu();
+ while (rcvrs) {
+ rcvr = rcvrs;
+ rcvrs = rcvr->next;
+ kfree(rcvr);
+ }
- down_read(&interfaces_sem);
- write_lock_irqsave(&intf->users_lock, flags);
- rv = ipmi_destroy_user_nolock(user);
- if (!rv) {
+ 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);
}
-
- write_unlock_irqrestore(&intf->users_lock, flags);
- up_read(&interfaces_sem);
- return rv;
+ mutex_unlock(&ipmi_interfaces_mutex);
+
+ kref_put(&intf->refcount, intf_free);
+
+ kref_put(&user->refcount, free_user);
+
+ return 0;
}
void ipmi_get_version(ipmi_user_t user,
unsigned char *major,
unsigned char *minor)
{
- *major = user->intf->version_major;
- *minor = user->intf->version_minor;
+ *major = user->intf->ipmi_version_major;
+ *minor = user->intf->ipmi_version_minor;
}
int ipmi_set_my_address(ipmi_user_t user,
return 0;
}
+int ipmi_get_maintenance_mode(ipmi_user_t user)
+{
+ int mode;
+ unsigned long flags;
+
+ spin_lock_irqsave(&user->intf->maintenance_mode_lock, flags);
+ mode = user->intf->maintenance_mode;
+ spin_unlock_irqrestore(&user->intf->maintenance_mode_lock, flags);
+
+ return mode;
+}
+EXPORT_SYMBOL(ipmi_get_maintenance_mode);
+
+static void maintenance_mode_update(ipmi_smi_t intf)
+{
+ if (intf->handlers->set_maintenance_mode)
+ intf->handlers->set_maintenance_mode(
+ intf->send_info, intf->maintenance_mode_enable);
+}
+
+int ipmi_set_maintenance_mode(ipmi_user_t user, int mode)
+{
+ int rv = 0;
+ unsigned long flags;
+ ipmi_smi_t intf = user->intf;
+
+ spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
+ if (intf->maintenance_mode != mode) {
+ switch (mode) {
+ case IPMI_MAINTENANCE_MODE_AUTO:
+ intf->maintenance_mode = mode;
+ intf->maintenance_mode_enable
+ = (intf->auto_maintenance_timeout > 0);
+ break;
+
+ case IPMI_MAINTENANCE_MODE_OFF:
+ intf->maintenance_mode = mode;
+ intf->maintenance_mode_enable = 0;
+ break;
+
+ case IPMI_MAINTENANCE_MODE_ON:
+ intf->maintenance_mode = mode;
+ intf->maintenance_mode_enable = 1;
+ break;
+
+ default:
+ rv = -EINVAL;
+ goto out_unlock;
+ }
+
+ maintenance_mode_update(intf);
+ }
+ out_unlock:
+ spin_unlock_irqrestore(&intf->maintenance_mode_lock, flags);
+
+ return rv;
+}
+EXPORT_SYMBOL(ipmi_set_maintenance_mode);
+
int ipmi_set_gets_events(ipmi_user_t user, int val)
{
- unsigned long flags;
- struct ipmi_recv_msg *msg, *msg2;
+ unsigned long flags;
+ ipmi_smi_t intf = user->intf;
+ struct ipmi_recv_msg *msg, *msg2;
+ struct list_head msgs;
+
+ INIT_LIST_HEAD(&msgs);
- read_lock(&(user->intf->users_lock));
- spin_lock_irqsave(&(user->intf->events_lock), flags);
+ spin_lock_irqsave(&intf->events_lock, flags);
user->gets_events = val;
- if (val) {
- /* Deliver any queued events. */
- list_for_each_entry_safe(msg, msg2, &(user->intf->waiting_events), link) {
- list_del(&msg->link);
+ 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;
+
+ 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;
}
-
- spin_unlock_irqrestore(&(user->intf->events_lock), flags);
- read_unlock(&(user->intf->users_lock));
+
+ out:
+ spin_unlock_irqrestore(&intf->events_lock, flags);
return 0;
}
+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 char cmd,
+ unsigned int chans)
{
- struct cmd_rcvr *cmp;
- unsigned long flags;
- struct cmd_rcvr *rcvr;
- int rv = 0;
+ ipmi_smi_t intf = user->intf;
+ struct cmd_rcvr *rcvr;
+ int rv = 0;
rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL);
- if (! rcvr)
+ if (!rcvr)
return -ENOMEM;
+ rcvr->cmd = cmd;
+ rcvr->netfn = netfn;
+ rcvr->chans = chans;
+ rcvr->user = user;
- read_lock(&(user->intf->users_lock));
- write_lock_irqsave(&(user->intf->cmd_rcvr_lock), flags);
+ mutex_lock(&intf->cmd_rcvrs_mutex);
/* Make sure the command/netfn is not already registered. */
- list_for_each_entry(cmp, &(user->intf->cmd_rcvrs), link) {
- if ((cmp->netfn == netfn) && (cmp->cmd == cmd)) {
- rv = -EBUSY;
- break;
- }
- }
-
- if (! rv) {
- rcvr->cmd = cmd;
- rcvr->netfn = netfn;
- rcvr->user = user;
- list_add_tail(&(rcvr->link), &(user->intf->cmd_rcvrs));
+ if (!is_cmd_rcvr_exclusive(intf, netfn, cmd, chans)) {
+ rv = -EBUSY;
+ goto out_unlock;
}
- write_unlock_irqrestore(&(user->intf->cmd_rcvr_lock), flags);
- read_unlock(&(user->intf->users_lock));
+ list_add_rcu(&rcvr->link, &intf->cmd_rcvrs);
+ out_unlock:
+ mutex_unlock(&intf->cmd_rcvrs_mutex);
if (rv)
kfree(rcvr);
int ipmi_unregister_for_cmd(ipmi_user_t user,
unsigned char netfn,
- unsigned char cmd)
+ unsigned char cmd,
+ unsigned int chans)
{
- unsigned long flags;
- struct cmd_rcvr *rcvr;
- int rv = -ENOENT;
-
- read_lock(&(user->intf->users_lock));
- write_lock_irqsave(&(user->intf->cmd_rcvr_lock), flags);
- /* Make sure the command/netfn is not already registered. */
- list_for_each_entry(rcvr, &(user->intf->cmd_rcvrs), link) {
- if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)) {
+ 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;
- list_del(&rcvr->link);
- kfree(rcvr);
- break;
+ rcvr->chans &= ~chans;
+ if (rcvr->chans == 0) {
+ list_del_rcu(&rcvr->link);
+ rcvr->next = rcvrs;
+ rcvrs = rcvr;
+ }
}
}
- write_unlock_irqrestore(&(user->intf->cmd_rcvr_lock), flags);
- read_unlock(&(user->intf->users_lock));
-
+ mutex_unlock(&intf->cmd_rcvrs_mutex);
+ synchronize_rcu();
+ while (rcvrs) {
+ rcvr = rcvrs;
+ rcvrs = rcvr->next;
+ kfree(rcvr);
+ }
return rv;
}
void ipmi_user_set_run_to_completion(ipmi_user_t user, int val)
{
- user->intf->handlers->set_run_to_completion(user->intf->send_info,
- val);
+ ipmi_smi_t intf = user->intf;
+ if (intf->handlers)
+ intf->handlers->set_run_to_completion(intf->send_info, val);
}
static unsigned char
supplied in certain circumstances (mainly at panic time). If
messages are supplied, they will be freed, even if an error
occurs. */
-static inline 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)
+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;
+ 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) {
}
}
+ 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. */
goto out_err;
}
+ if (((msg->netfn == IPMI_NETFN_APP_REQUEST)
+ && ((msg->cmd == IPMI_COLD_RESET_CMD)
+ || (msg->cmd == IPMI_WARM_RESET_CMD)))
+ || (msg->netfn == IPMI_NETFN_FIRMWARE_REQUEST))
+ {
+ spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
+ intf->auto_maintenance_timeout
+ = IPMI_MAINTENANCE_MODE_TIMEOUT;
+ if (!intf->maintenance_mode
+ && !intf->maintenance_mode_enable)
+ {
+ intf->maintenance_mode_enable = 1;
+ maintenance_mode_update(intf);
+ }
+ spin_unlock_irqrestore(&intf->maintenance_mode_lock,
+ flags);
+ }
+
if ((msg->data_len + 2) > IPMI_MAX_MSG_LENGTH) {
spin_lock_irqsave(&intf->counter_lock, flags);
intf->sent_invalid_commands++;
unsigned char ipmb_seq;
long seqid;
- if (addr->channel >= IPMI_NUM_CHANNELS) {
+ if (addr->channel >= IPMI_MAX_CHANNELS) {
spin_lock_irqsave(&intf->counter_lock, flags);
intf->sent_invalid_commands++;
spin_unlock_irqrestore(&intf->counter_lock, flags);
printk("\n");
}
#endif
- intf->handlers->sender(intf->send_info, smi_msg, priority);
+
+ 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;
unsigned char saddr, lun;
int rv;
- if (! user)
+ if (!user)
return -EINVAL;
rv = check_addr(user->intf, addr, &saddr, &lun);
if (rv)
unsigned char saddr, lun;
int rv;
- if (! user)
+ if (!user)
return -EINVAL;
rv = check_addr(user->intf, addr, &saddr, &lun);
if (rv)
-1, 0);
}
+#ifdef CONFIG_PROC_FS
static int ipmb_file_read_proc(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
char *out = (char *) page;
ipmi_smi_t intf = data;
int i;
- int rv= 0;
+ int rv = 0;
for (i = 0; i < IPMI_MAX_CHANNELS; i++)
rv += sprintf(out+rv, "%x ", intf->channels[i].address);
ipmi_smi_t intf = data;
return sprintf(out, "%d.%d\n",
- intf->version_major, intf->version_minor);
+ ipmi_version_major(&intf->bmc->id),
+ ipmi_version_minor(&intf->bmc->id));
}
static int stat_file_read_proc(char *page, char **start, off_t off,
return (out - ((char *) page));
}
+#endif /* CONFIG_PROC_FS */
int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name,
read_proc_t *read_proc, write_proc_t *write_proc,
kfree(entry);
rv = -ENOMEM;
} else {
- file->nlink = 1;
file->data = data;
file->read_proc = read_proc;
file->write_proc = write_proc;
#endif /* CONFIG_PROC_FS */
}
-static int
-send_channel_info_cmd(ipmi_smi_t intf, int chan)
+static int __find_bmc_guid(struct device *dev, void *data)
{
- struct kernel_ipmi_msg msg;
- unsigned char data[1];
- struct ipmi_system_interface_addr si;
+ unsigned char *id = data;
+ struct bmc_device *bmc = dev_get_drvdata(dev);
+ return memcmp(bmc->guid, id, 16) == 0;
+}
- si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
- si.channel = IPMI_BMC_CHANNEL;
- si.lun = 0;
+static struct bmc_device *ipmi_find_bmc_guid(struct device_driver *drv,
+ unsigned char *guid)
+{
+ struct device *dev;
- 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);
+ dev = driver_find_device(drv, NULL, guid, __find_bmc_guid);
+ if (dev)
+ return dev_get_drvdata(dev);
+ else
+ return NULL;
}
-static void
+struct prod_dev_id {
+ unsigned int product_id;
+ unsigned char device_id;
+};
+
+static int __find_bmc_prod_dev_id(struct device *dev, void *data)
+{
+ struct prod_dev_id *id = data;
+ struct bmc_device *bmc = dev_get_drvdata(dev);
+
+ return (bmc->id.product_id == id->product_id
+ && bmc->id.device_id == id->device_id);
+}
+
+static struct bmc_device *ipmi_find_bmc_prod_dev_id(
+ struct device_driver *drv,
+ unsigned int product_id, unsigned char device_id)
+{
+ struct prod_dev_id id = {
+ .product_id = product_id,
+ .device_id = device_id,
+ };
+ struct device *dev;
+
+ dev = driver_find_device(drv, NULL, &id, __find_bmc_prod_dev_id);
+ if (dev)
+ return dev_get_drvdata(dev);
+ else
+ return NULL;
+}
+
+static ssize_t device_id_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bmc_device *bmc = dev_get_drvdata(dev);
+
+ return snprintf(buf, 10, "%u\n", bmc->id.device_id);
+}
+
+static ssize_t provides_dev_sdrs_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bmc_device *bmc = dev_get_drvdata(dev);
+
+ return snprintf(buf, 10, "%u\n",
+ (bmc->id.device_revision & 0x80) >> 7);
+}
+
+static ssize_t revision_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct bmc_device *bmc = dev_get_drvdata(dev);
+
+ return snprintf(buf, 20, "%u\n",
+ bmc->id.device_revision & 0x0F);
+}
+
+static ssize_t firmware_rev_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bmc_device *bmc = dev_get_drvdata(dev);
+
+ return snprintf(buf, 20, "%u.%x\n", bmc->id.firmware_revision_1,
+ bmc->id.firmware_revision_2);
+}
+
+static ssize_t ipmi_version_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bmc_device *bmc = dev_get_drvdata(dev);
+
+ return snprintf(buf, 20, "%u.%u\n",
+ ipmi_version_major(&bmc->id),
+ ipmi_version_minor(&bmc->id));
+}
+
+static ssize_t add_dev_support_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bmc_device *bmc = dev_get_drvdata(dev);
+
+ return snprintf(buf, 10, "0x%02x\n",
+ bmc->id.additional_device_support);
+}
+
+static ssize_t manufacturer_id_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bmc_device *bmc = dev_get_drvdata(dev);
+
+ return snprintf(buf, 20, "0x%6.6x\n", bmc->id.manufacturer_id);
+}
+
+static ssize_t product_id_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bmc_device *bmc = dev_get_drvdata(dev);
+
+ return snprintf(buf, 10, "0x%4.4x\n", bmc->id.product_id);
+}
+
+static ssize_t aux_firmware_rev_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bmc_device *bmc = dev_get_drvdata(dev);
+
+ return snprintf(buf, 21, "0x%02x 0x%02x 0x%02x 0x%02x\n",
+ bmc->id.aux_firmware_revision[3],
+ bmc->id.aux_firmware_revision[2],
+ bmc->id.aux_firmware_revision[1],
+ bmc->id.aux_firmware_revision[0]);
+}
+
+static ssize_t guid_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct bmc_device *bmc = dev_get_drvdata(dev);
+
+ return snprintf(buf, 100, "%Lx%Lx\n",
+ (long long) bmc->guid[0],
+ (long long) bmc->guid[8]);
+}
+
+static void remove_files(struct bmc_device *bmc)
+{
+ if (!bmc->dev)
+ return;
+
+ device_remove_file(&bmc->dev->dev,
+ &bmc->device_id_attr);
+ device_remove_file(&bmc->dev->dev,
+ &bmc->provides_dev_sdrs_attr);
+ device_remove_file(&bmc->dev->dev,
+ &bmc->revision_attr);
+ device_remove_file(&bmc->dev->dev,
+ &bmc->firmware_rev_attr);
+ device_remove_file(&bmc->dev->dev,
+ &bmc->version_attr);
+ device_remove_file(&bmc->dev->dev,
+ &bmc->add_dev_support_attr);
+ device_remove_file(&bmc->dev->dev,
+ &bmc->manufacturer_id_attr);
+ device_remove_file(&bmc->dev->dev,
+ &bmc->product_id_attr);
+
+ if (bmc->id.aux_firmware_revision_set)
+ device_remove_file(&bmc->dev->dev,
+ &bmc->aux_firmware_rev_attr);
+ if (bmc->guid_set)
+ device_remove_file(&bmc->dev->dev,
+ &bmc->guid_attr);
+}
+
+static void
+cleanup_bmc_device(struct kref *ref)
+{
+ struct bmc_device *bmc;
+
+ bmc = container_of(ref, struct bmc_device, refcount);
+
+ remove_files(bmc);
+ platform_device_unregister(bmc->dev);
+ kfree(bmc);
+}
+
+static void ipmi_bmc_unregister(ipmi_smi_t intf)
+{
+ struct bmc_device *bmc = intf->bmc;
+
+ if (intf->sysfs_name) {
+ sysfs_remove_link(&intf->si_dev->kobj, intf->sysfs_name);
+ kfree(intf->sysfs_name);
+ intf->sysfs_name = NULL;
+ }
+ if (intf->my_dev_name) {
+ sysfs_remove_link(&bmc->dev->dev.kobj, intf->my_dev_name);
+ kfree(intf->my_dev_name);
+ intf->my_dev_name = NULL;
+ }
+
+ mutex_lock(&ipmidriver_mutex);
+ kref_put(&bmc->refcount, cleanup_bmc_device);
+ intf->bmc = NULL;
+ mutex_unlock(&ipmidriver_mutex);
+}
+
+static int create_files(struct bmc_device *bmc)
+{
+ int err;
+
+ bmc->device_id_attr.attr.name = "device_id";
+ bmc->device_id_attr.attr.mode = S_IRUGO;
+ bmc->device_id_attr.show = device_id_show;
+
+ bmc->provides_dev_sdrs_attr.attr.name = "provides_device_sdrs";
+ bmc->provides_dev_sdrs_attr.attr.mode = S_IRUGO;
+ bmc->provides_dev_sdrs_attr.show = provides_dev_sdrs_show;
+
+ bmc->revision_attr.attr.name = "revision";
+ bmc->revision_attr.attr.mode = S_IRUGO;
+ bmc->revision_attr.show = revision_show;
+
+ bmc->firmware_rev_attr.attr.name = "firmware_revision";
+ bmc->firmware_rev_attr.attr.mode = S_IRUGO;
+ bmc->firmware_rev_attr.show = firmware_rev_show;
+
+ bmc->version_attr.attr.name = "ipmi_version";
+ bmc->version_attr.attr.mode = S_IRUGO;
+ bmc->version_attr.show = ipmi_version_show;
+
+ bmc->add_dev_support_attr.attr.name = "additional_device_support";
+ bmc->add_dev_support_attr.attr.mode = S_IRUGO;
+ bmc->add_dev_support_attr.show = add_dev_support_show;
+
+ bmc->manufacturer_id_attr.attr.name = "manufacturer_id";
+ bmc->manufacturer_id_attr.attr.mode = S_IRUGO;
+ bmc->manufacturer_id_attr.show = manufacturer_id_show;
+
+ bmc->product_id_attr.attr.name = "product_id";
+ bmc->product_id_attr.attr.mode = S_IRUGO;
+ bmc->product_id_attr.show = product_id_show;
+
+ bmc->guid_attr.attr.name = "guid";
+ bmc->guid_attr.attr.mode = S_IRUGO;
+ bmc->guid_attr.show = guid_show;
+
+ bmc->aux_firmware_rev_attr.attr.name = "aux_firmware_revision";
+ bmc->aux_firmware_rev_attr.attr.mode = S_IRUGO;
+ bmc->aux_firmware_rev_attr.show = aux_firmware_rev_show;
+
+ err = device_create_file(&bmc->dev->dev,
+ &bmc->device_id_attr);
+ if (err) goto out;
+ err = device_create_file(&bmc->dev->dev,
+ &bmc->provides_dev_sdrs_attr);
+ if (err) goto out_devid;
+ err = device_create_file(&bmc->dev->dev,
+ &bmc->revision_attr);
+ if (err) goto out_sdrs;
+ err = device_create_file(&bmc->dev->dev,
+ &bmc->firmware_rev_attr);
+ if (err) goto out_rev;
+ err = device_create_file(&bmc->dev->dev,
+ &bmc->version_attr);
+ if (err) goto out_firm;
+ err = device_create_file(&bmc->dev->dev,
+ &bmc->add_dev_support_attr);
+ if (err) goto out_version;
+ err = device_create_file(&bmc->dev->dev,
+ &bmc->manufacturer_id_attr);
+ if (err) goto out_add_dev;
+ err = device_create_file(&bmc->dev->dev,
+ &bmc->product_id_attr);
+ if (err) goto out_manu;
+ if (bmc->id.aux_firmware_revision_set) {
+ err = device_create_file(&bmc->dev->dev,
+ &bmc->aux_firmware_rev_attr);
+ if (err) goto out_prod_id;
+ }
+ if (bmc->guid_set) {
+ err = device_create_file(&bmc->dev->dev,
+ &bmc->guid_attr);
+ if (err) goto out_aux_firm;
+ }
+
+ return 0;
+
+out_aux_firm:
+ if (bmc->id.aux_firmware_revision_set)
+ device_remove_file(&bmc->dev->dev,
+ &bmc->aux_firmware_rev_attr);
+out_prod_id:
+ device_remove_file(&bmc->dev->dev,
+ &bmc->product_id_attr);
+out_manu:
+ device_remove_file(&bmc->dev->dev,
+ &bmc->manufacturer_id_attr);
+out_add_dev:
+ device_remove_file(&bmc->dev->dev,
+ &bmc->add_dev_support_attr);
+out_version:
+ device_remove_file(&bmc->dev->dev,
+ &bmc->version_attr);
+out_firm:
+ device_remove_file(&bmc->dev->dev,
+ &bmc->firmware_rev_attr);
+out_rev:
+ device_remove_file(&bmc->dev->dev,
+ &bmc->revision_attr);
+out_sdrs:
+ device_remove_file(&bmc->dev->dev,
+ &bmc->provides_dev_sdrs_attr);
+out_devid:
+ device_remove_file(&bmc->dev->dev,
+ &bmc->device_id_attr);
+out:
+ return err;
+}
+
+static int ipmi_bmc_register(ipmi_smi_t intf, int ifnum,
+ const char *sysfs_name)
+{
+ int rv;
+ struct bmc_device *bmc = intf->bmc;
+ struct bmc_device *old_bmc;
+ int size;
+ char dummy[1];
+
+ mutex_lock(&ipmidriver_mutex);
+
+ /*
+ * Try to find if there is an bmc_device struct
+ * representing the interfaced BMC already
+ */
+ if (bmc->guid_set)
+ old_bmc = ipmi_find_bmc_guid(&ipmidriver, bmc->guid);
+ else
+ old_bmc = ipmi_find_bmc_prod_dev_id(&ipmidriver,
+ bmc->id.product_id,
+ bmc->id.device_id);
+
+ /*
+ * If there is already an bmc_device, free the new one,
+ * otherwise register the new BMC device
+ */
+ if (old_bmc) {
+ kfree(bmc);
+ intf->bmc = old_bmc;
+ bmc = old_bmc;
+
+ kref_get(&bmc->refcount);
+ mutex_unlock(&ipmidriver_mutex);
+
+ printk(KERN_INFO
+ "ipmi: interfacing existing BMC (man_id: 0x%6.6x,"
+ " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
+ bmc->id.manufacturer_id,
+ bmc->id.product_id,
+ bmc->id.device_id);
+ } else {
+ char name[14];
+ unsigned char orig_dev_id = bmc->id.device_id;
+ int warn_printed = 0;
+
+ snprintf(name, sizeof(name),
+ "ipmi_bmc.%4.4x", bmc->id.product_id);
+
+ while (ipmi_find_bmc_prod_dev_id(&ipmidriver,
+ bmc->id.product_id,
+ bmc->id.device_id)) {
+ if (!warn_printed) {
+ printk(KERN_WARNING PFX
+ "This machine has two different BMCs"
+ " with the same product id and device"
+ " id. This is an error in the"
+ " firmware, but incrementing the"
+ " device id to work around the problem."
+ " Prod ID = 0x%x, Dev ID = 0x%x\n",
+ bmc->id.product_id, bmc->id.device_id);
+ warn_printed = 1;
+ }
+ bmc->id.device_id++; /* Wraps at 255 */
+ if (bmc->id.device_id == orig_dev_id) {
+ printk(KERN_ERR PFX
+ "Out of device ids!\n");
+ break;
+ }
+ }
+
+ bmc->dev = platform_device_alloc(name, bmc->id.device_id);
+ if (!bmc->dev) {
+ mutex_unlock(&ipmidriver_mutex);
+ printk(KERN_ERR
+ "ipmi_msghandler:"
+ " Unable to allocate platform device\n");
+ return -ENOMEM;
+ }
+ bmc->dev->dev.driver = &ipmidriver;
+ dev_set_drvdata(&bmc->dev->dev, bmc);
+ kref_init(&bmc->refcount);
+
+ rv = platform_device_add(bmc->dev);
+ mutex_unlock(&ipmidriver_mutex);
+ if (rv) {
+ platform_device_put(bmc->dev);
+ bmc->dev = NULL;
+ printk(KERN_ERR
+ "ipmi_msghandler:"
+ " Unable to register bmc device: %d\n",
+ rv);
+ /* Don't go to out_err, you can only do that if
+ the device is registered already. */
+ return rv;
+ }
+
+ rv = create_files(bmc);
+ if (rv) {
+ mutex_lock(&ipmidriver_mutex);
+ platform_device_unregister(bmc->dev);
+ mutex_unlock(&ipmidriver_mutex);
+
+ return rv;
+ }
+
+ printk(KERN_INFO
+ "ipmi: Found new BMC (man_id: 0x%6.6x, "
+ " prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",
+ bmc->id.manufacturer_id,
+ bmc->id.product_id,
+ bmc->id.device_id);
+ }
+
+ /*
+ * create symlink from system interface device to bmc device
+ * and back.
+ */
+ intf->sysfs_name = kstrdup(sysfs_name, GFP_KERNEL);
+ if (!intf->sysfs_name) {
+ rv = -ENOMEM;
+ printk(KERN_ERR
+ "ipmi_msghandler: allocate link to BMC: %d\n",
+ rv);
+ goto out_err;
+ }
+
+ rv = sysfs_create_link(&intf->si_dev->kobj,
+ &bmc->dev->dev.kobj, intf->sysfs_name);
+ if (rv) {
+ kfree(intf->sysfs_name);
+ intf->sysfs_name = NULL;
+ printk(KERN_ERR
+ "ipmi_msghandler: Unable to create bmc symlink: %d\n",
+ rv);
+ goto out_err;
+ }
+
+ size = snprintf(dummy, 0, "ipmi%d", ifnum);
+ intf->my_dev_name = kmalloc(size+1, GFP_KERNEL);
+ if (!intf->my_dev_name) {
+ kfree(intf->sysfs_name);
+ intf->sysfs_name = NULL;
+ rv = -ENOMEM;
+ printk(KERN_ERR
+ "ipmi_msghandler: allocate link from BMC: %d\n",
+ rv);
+ goto out_err;
+ }
+ snprintf(intf->my_dev_name, size+1, "ipmi%d", ifnum);
+
+ rv = sysfs_create_link(&bmc->dev->dev.kobj, &intf->si_dev->kobj,
+ intf->my_dev_name);
+ if (rv) {
+ kfree(intf->sysfs_name);
+ intf->sysfs_name = NULL;
+ kfree(intf->my_dev_name);
+ intf->my_dev_name = NULL;
+ printk(KERN_ERR
+ "ipmi_msghandler:"
+ " Unable to create symlink to bmc: %d\n",
+ rv);
+ goto out_err;
+ }
+
+ return 0;
+
+out_err:
+ ipmi_bmc_unregister(intf);
+ return rv;
+}
+
+static int
+send_guid_cmd(ipmi_smi_t intf, int chan)
+{
+ struct kernel_ipmi_msg msg;
+ struct ipmi_system_interface_addr si;
+
+ si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
+ si.channel = IPMI_BMC_CHANNEL;
+ si.lun = 0;
+
+ msg.netfn = IPMI_NETFN_APP_REQUEST;
+ msg.cmd = IPMI_GET_DEVICE_GUID_CMD;
+ msg.data = NULL;
+ msg.data_len = 0;
+ return i_ipmi_request(NULL,
+ intf,
+ (struct ipmi_addr *) &si,
+ 0,
+ &msg,
+ intf,
+ NULL,
+ NULL,
+ 0,
+ intf->channels[0].address,
+ intf->channels[0].lun,
+ -1, 0);
+}
+
+static void
+guid_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
+{
+ if ((msg->addr.addr_type != IPMI_SYSTEM_INTERFACE_ADDR_TYPE)
+ || (msg->msg.netfn != IPMI_NETFN_APP_RESPONSE)
+ || (msg->msg.cmd != IPMI_GET_DEVICE_GUID_CMD))
+ /* Not for me */
+ return;
+
+ if (msg->msg.data[0] != 0) {
+ /* Error from getting the GUID, the BMC doesn't have one. */
+ intf->bmc->guid_set = 0;
+ goto out;
+ }
+
+ if (msg->msg.data_len < 17) {
+ intf->bmc->guid_set = 0;
+ printk(KERN_WARNING PFX
+ "guid_handler: The GUID response from the BMC was too"
+ " short, it was %d but should have been 17. Assuming"
+ " GUID is not available.\n",
+ msg->msg.data_len);
+ goto out;
+ }
+
+ memcpy(intf->bmc->guid, msg->msg.data, 16);
+ intf->bmc->guid_set = 1;
+ out:
+ wake_up(&intf->waitq);
+}
+
+static void
+get_guid(ipmi_smi_t intf)
+{
+ int rv;
+
+ intf->bmc->guid_set = 0x2;
+ intf->null_user_handler = guid_handler;
+ rv = send_guid_cmd(intf, 0);
+ if (rv)
+ /* Send failed, no GUID available. */
+ intf->bmc->guid_set = 0;
+ wait_event(intf->waitq, intf->bmc->guid_set != 2);
+ intf->null_user_handler = NULL;
+}
+
+static int
+send_channel_info_cmd(ipmi_smi_t intf, int chan)
+{
+ struct kernel_ipmi_msg msg;
+ unsigned char data[1];
+ struct ipmi_system_interface_addr si;
+
+ si.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
+ si.channel = IPMI_BMC_CHANNEL;
+ si.lun = 0;
+
+ msg.netfn = IPMI_NETFN_APP_REQUEST;
+ msg.cmd = IPMI_GET_CHANNEL_INFO_CMD;
+ msg.data = data;
+ msg.data_len = 1;
+ data[0] = chan;
+ return i_ipmi_request(NULL,
+ intf,
+ (struct ipmi_addr *) &si,
+ 0,
+ &msg,
+ intf,
+ NULL,
+ NULL,
+ 0,
+ intf->channels[0].address,
+ intf->channels[0].lun,
+ -1, 0);
+}
+
+static void
channel_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
{
int rv = 0;
int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
void *send_info,
- unsigned char version_major,
- unsigned char version_minor,
- unsigned char slave_addr,
- ipmi_smi_t *intf)
+ 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 new_intf;
- unsigned long flags;
-
+ 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. */
return -ENODEV;
}
- new_intf = kmalloc(sizeof(*new_intf), GFP_KERNEL);
- if (!new_intf)
+ intf = kzalloc(sizeof(*intf), GFP_KERNEL);
+ if (!intf)
return -ENOMEM;
- memset(new_intf, 0, sizeof(*new_intf));
-
- new_intf->proc_dir = NULL;
-
- rv = -ENOMEM;
-
- down_write(&interfaces_sem);
- for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
- if (ipmi_interfaces[i] == NULL) {
- new_intf->intf_num = i;
- new_intf->version_major = version_major;
- new_intf->version_minor = version_minor;
- for (j = 0; j < IPMI_MAX_CHANNELS; j++) {
- new_intf->channels[j].address
- = IPMI_BMC_SLAVE_ADDR;
- new_intf->channels[j].lun = 2;
- }
- if (slave_addr != 0)
- new_intf->channels[0].address = slave_addr;
- rwlock_init(&(new_intf->users_lock));
- INIT_LIST_HEAD(&(new_intf->users));
- new_intf->handlers = handlers;
- new_intf->send_info = send_info;
- spin_lock_init(&(new_intf->seq_lock));
- for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) {
- new_intf->seq_table[j].inuse = 0;
- new_intf->seq_table[j].seqid = 0;
- }
- new_intf->curr_seq = 0;
-#ifdef CONFIG_PROC_FS
- spin_lock_init(&(new_intf->proc_entry_lock));
-#endif
- spin_lock_init(&(new_intf->waiting_msgs_lock));
- INIT_LIST_HEAD(&(new_intf->waiting_msgs));
- spin_lock_init(&(new_intf->events_lock));
- INIT_LIST_HEAD(&(new_intf->waiting_events));
- new_intf->waiting_events_count = 0;
- rwlock_init(&(new_intf->cmd_rcvr_lock));
- init_waitqueue_head(&new_intf->waitq);
- INIT_LIST_HEAD(&(new_intf->cmd_rcvrs));
-
- spin_lock_init(&(new_intf->counter_lock));
- spin_lock_irqsave(&interfaces_lock, flags);
- ipmi_interfaces[i] = new_intf;
- spin_unlock_irqrestore(&interfaces_lock, flags);
+ intf->ipmi_version_major = ipmi_version_major(device_id);
+ intf->ipmi_version_minor = ipmi_version_minor(device_id);
- rv = 0;
- *intf = new_intf;
+ 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
+ spin_lock_init(&intf->proc_entry_lock);
+#endif
+ spin_lock_init(&intf->waiting_msgs_lock);
+ INIT_LIST_HEAD(&intf->waiting_msgs);
+ spin_lock_init(&intf->events_lock);
+ INIT_LIST_HEAD(&intf->waiting_events);
+ intf->waiting_events_count = 0;
+ mutex_init(&intf->cmd_rcvrs_mutex);
+ spin_lock_init(&intf->maintenance_mode_lock);
+ INIT_LIST_HEAD(&intf->cmd_rcvrs);
+ init_waitqueue_head(&intf->waitq);
+
+ spin_lock_init(&intf->counter_lock);
+ 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);
- downgrade_write(&interfaces_sem);
+ rv = handlers->start_processing(send_info, intf);
+ if (rv)
+ goto out;
- if (rv == 0)
- rv = add_proc_entries(*intf, i);
+ get_guid(intf);
- if (rv == 0) {
- if ((version_major > 1)
- || ((version_major == 1) && (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;
+ 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. */
- up_read(&interfaces_sem);
- wait_event((*intf)->waitq,
- ((*intf)->curr_channel>=IPMI_MAX_CHANNELS));
- down_read(&interfaces_sem);
+ /* Wait for the channel info to be read. */
+ wait_event(intf->waitq,
+ intf->curr_channel >= IPMI_MAX_CHANNELS);
+ intf->null_user_handler = NULL;
+ } else {
+ /* Assume a single IPMB channel at zero. */
+ intf->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB;
+ intf->channels[0].protocol = IPMI_CHANNEL_PROTOCOL_IPMB;
+ }
- if (ipmi_interfaces[i] != new_intf)
- /* Well, it went away. Just return. */
- goto out;
- } else {
- /* Assume a single IPMB channel at zero. */
- (*intf)->channels[0].medium = IPMI_CHANNEL_MEDIUM_IPMB;
- (*intf)->channels[0].protocol
- = IPMI_CHANNEL_PROTOCOL_IPMB;
- }
+ if (rv == 0)
+ rv = add_proc_entries(intf, i);
- /* Call all the watcher interfaces to tell
- them that a new interface is available. */
- call_smi_watchers(i);
- }
+ rv = ipmi_bmc_register(intf, i, sysfs_name);
out:
- up_read(&interfaces_sem);
-
if (rv) {
- if (new_intf->proc_dir)
- remove_proc_entries(new_intf);
- kfree(new_intf);
+ 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;
}
-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_cmd_rcvr_list(struct list_head *q)
+static void cleanup_smi_msgs(ipmi_smi_t intf)
{
- struct cmd_rcvr *rcvr, *rcvr2;
-
- list_for_each_entry_safe(rcvr, rcvr2, q, link) {
- list_del(&rcvr->link);
- kfree(rcvr);
- }
-}
-
-static void clean_up_interface_data(ipmi_smi_t intf)
-{
- int i;
-
- free_recv_msg_list(&(intf->waiting_msgs));
- free_recv_msg_list(&(intf->waiting_events));
- free_cmd_rcvr_list(&(intf->cmd_rcvrs));
+ int i;
+ struct seq_table *ent;
+ /* No need for locks, the interface is down. */
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);
- }
+ 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)
{
- int rv = -ENODEV;
- int i;
struct ipmi_smi_watcher *w;
- unsigned long flags;
+ int intf_num = intf->intf_num;
- down_write(&interfaces_sem);
- if (list_empty(&(intf->users)))
- {
- for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
- if (ipmi_interfaces[i] == intf) {
- remove_proc_entries(intf);
- spin_lock_irqsave(&interfaces_lock, flags);
- ipmi_interfaces[i] = NULL;
- clean_up_interface_data(intf);
- spin_unlock_irqrestore(&interfaces_lock,flags);
- kfree(intf);
- rv = 0;
- goto out_call_watcher;
- }
- }
- } else {
- rv = -EBUSY;
- }
- up_write(&interfaces_sem);
+ ipmi_bmc_unregister(intf);
- return rv;
+ 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);
- out_call_watcher:
- downgrade_write(&interfaces_sem);
+ remove_proc_entries(intf);
/* Call all the watcher interfaces to tell them that
an interface is gone. */
- down_read(&smi_watchers_sem);
- list_for_each_entry(w, &smi_watchers, link) {
- w->smi_gone(i);
- }
- up_read(&smi_watchers_sem);
- up_read(&interfaces_sem);
+ 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;
}
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;
- ipmi_user_t user = NULL;
- struct ipmi_ipmb_addr *ipmb_addr;
- struct ipmi_recv_msg *recv_msg;
- unsigned long flags;
+ 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;
+ unsigned long flags;
+ struct ipmi_smi_handlers *handlers;
if (msg->rsp_size < 10) {
/* Message not big enough, just ignore it. */
netfn = msg->rsp[4] >> 2;
cmd = msg->rsp[8];
+ chan = msg->rsp[3] & 0xf;
- read_lock(&(intf->cmd_rcvr_lock));
-
- /* Find the command/netfn. */
- list_for_each_entry(rcvr, &(intf->cmd_rcvrs), link) {
- if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)) {
- user = rcvr->user;
- break;
- }
- }
- read_unlock(&(intf->cmd_rcvr_lock));
+ 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. */
printk("\n");
}
#endif
- intf->handlers->sender(intf->send_info, msg, 0);
-
- rv = -1; /* We used the message, so return the value that
- causes it to not be freed or queued. */
+ 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. */
spin_lock_irqsave(&intf->counter_lock, flags);
spin_unlock_irqrestore(&intf->counter_lock, flags);
recv_msg = ipmi_alloc_recv_msg();
- if (! 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;
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;
- ipmi_user_t user = NULL;
- struct ipmi_lan_addr *lan_addr;
- struct ipmi_recv_msg *recv_msg;
- unsigned long flags;
+ 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;
+ unsigned long flags;
if (msg->rsp_size < 12) {
/* Message not big enough, just ignore it. */
netfn = msg->rsp[6] >> 2;
cmd = msg->rsp[10];
+ chan = msg->rsp[3] & 0xf;
- read_lock(&(intf->cmd_rcvr_lock));
-
- /* Find the command/netfn. */
- list_for_each_entry(rcvr, &(intf->cmd_rcvrs), link) {
- if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)) {
- user = rcvr->user;
- break;
- }
- }
- read_unlock(&(intf->cmd_rcvr_lock));
+ 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. */
+ /* We didn't find a user, just give up. */
spin_lock_irqsave(&intf->counter_lock, flags);
intf->unhandled_commands++;
spin_unlock_irqrestore(&intf->counter_lock, flags);
spin_unlock_irqrestore(&intf->counter_lock, flags);
recv_msg = ipmi_alloc_recv_msg();
- if (! 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;
recv_msg->msg.data_len = msg->rsp_size - 3;
}
-/* This will be called with the intf->users_lock read-locked, so no need
- to do that here. */
static int handle_read_event_rsp(ipmi_smi_t intf,
struct ipmi_smi_msg *msg)
{
INIT_LIST_HEAD(&msgs);
- spin_lock_irqsave(&(intf->events_lock), flags);
+ spin_lock_irqsave(&intf->events_lock, flags);
spin_lock(&intf->counter_lock);
intf->events++;
/* Allocate and fill in one message for every user that is getting
events. */
- list_for_each_entry(user, &(intf->users), link) {
- if (! user->gets_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) {
- list_for_each_entry_safe(recv_msg, recv_msg2, &msgs, link) {
+ 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);
}
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. */
/* 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) {
+ if (!recv_msg) {
/* We couldn't allocate memory for the
message, so requeue it for handling
later. */
copy_event_into_recv_msg(recv_msg, msg);
list_add_tail(&(recv_msg->link), &(intf->waiting_events));
+ intf->waiting_events_count++;
} else {
/* There's too many things in the queue, discard this
message. */
struct ipmi_smi_msg *msg)
{
struct ipmi_recv_msg *recv_msg;
- int found = 0;
- struct ipmi_user *user;
unsigned long flags;
+ struct ipmi_user *user;
recv_msg = (struct ipmi_recv_msg *) msg->user_data;
if (recv_msg == NULL)
return 0;
}
+ user = recv_msg->user;
/* Make sure the user still exists. */
- list_for_each_entry(user, &(intf->users), link) {
- if (user == recv_msg->user) {
- /* Found it, so we can deliver it */
- found = 1;
- break;
- }
- }
-
- if ((! found) && recv_msg->user) {
+ if (user && !user->valid) {
/* The user for the message went away, so give up. */
spin_lock_irqsave(&intf->counter_lock, flags);
intf->unhandled_local_responses++;
{
/* 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;
+ struct ipmi_recv_msg *recv_msg = msg->user_data;
requeue = 0;
if (msg->rsp_size < 2)
/* Invalid channel number */
goto out;
- if (recv_msg) {
- 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);
- }
+ 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))
{
int rv;
- /* Lock the user lock so the user can't go away while we are
- working on it. */
- read_lock(&(intf->users_lock));
-
if ((msg->data_size >= 2)
&& (msg->data[0] == (IPMI_NETFN_APP_REQUEST << 2))
&& (msg->data[1] == IPMI_SEND_MSG_CMD)
- && (msg->user_data == NULL)) {
+ && (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
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_LOST_ARBITRATION_ERR)
+ && (msg->rsp[2] != IPMI_BUS_ERR)
+ && (msg->rsp[2] != IPMI_NAK_ON_WRITE_ERR))
{
int chan = msg->rsp[3] & 0xf;
}
ipmi_free_smi_msg(msg);
- goto out_unlock;
+ goto out;
}
/* To preserve message order, if the list is not empty, we
tack this message onto the end of the list. */
- spin_lock_irqsave(&(intf->waiting_msgs_lock), flags);
- if (!list_empty(&(intf->waiting_msgs))) {
- list_add_tail(&(msg->link), &(intf->waiting_msgs));
- spin_unlock(&(intf->waiting_msgs_lock));
- goto out_unlock;
+ spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
+ if (!list_empty(&intf->waiting_msgs)) {
+ list_add_tail(&msg->link, &intf->waiting_msgs);
+ spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
+ goto out;
}
- spin_unlock_irqrestore(&(intf->waiting_msgs_lock), flags);
+ spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
rv = handle_new_recv_msg(intf, msg);
if (rv > 0) {
/* Could not handle the message now, just add it to a
list to handle later. */
- spin_lock(&(intf->waiting_msgs_lock));
- list_add_tail(&(msg->link), &(intf->waiting_msgs));
- spin_unlock(&(intf->waiting_msgs_lock));
+ spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
+ list_add_tail(&msg->link, &intf->waiting_msgs);
+ spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
} else if (rv == 0) {
ipmi_free_smi_msg(msg);
}
- out_unlock:
- read_unlock(&(intf->users_lock));
+ out:
+ return;
}
void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf)
{
ipmi_user_t user;
- read_lock(&(intf->users_lock));
- list_for_each_entry(user, &(intf->users), link) {
- if (! user->handler->ipmi_watchdog_pretimeout)
+ rcu_read_lock();
+ list_for_each_entry_rcu(user, &intf->users, link) {
+ if (!user->handler->ipmi_watchdog_pretimeout)
continue;
user->handler->ipmi_watchdog_pretimeout(user->handler_data);
}
- read_unlock(&(intf->users_lock));
+ rcu_read_unlock();
}
-static void
-handle_msg_timeout(struct ipmi_recv_msg *msg)
-{
- msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
- msg->msg_data[0] = IPMI_TIMEOUT_COMPLETION_CODE;
- msg->msg.netfn |= 1; /* Convert to a response. */
- msg->msg.data_len = 1;
- msg->msg.data = msg->msg_data;
- deliver_response(msg);
-}
static struct ipmi_smi_msg *
smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg,
return smi_msg;
}
-static void
-ipmi_timeout_handler(long timeout_period)
+static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
+ struct list_head *timeouts, long timeout_period,
+ int slot, unsigned long *flags)
+{
+ struct ipmi_recv_msg *msg;
+ struct ipmi_smi_handlers *handlers;
+
+ if (intf->intf_num == -1)
+ return;
+
+ if (!ent->inuse)
+ return;
+
+ ent->timeout -= timeout_period;
+ if (ent->timeout > 0)
+ return;
+
+ if (ent->retries_left == 0) {
+ /* The message has used all its retries. */
+ ent->inuse = 0;
+ msg = ent->recv_msg;
+ list_add_tail(&msg->link, timeouts);
+ spin_lock(&intf->counter_lock);
+ if (ent->broadcast)
+ intf->timed_out_ipmb_broadcasts++;
+ else if (ent->recv_msg->addr.addr_type == IPMI_LAN_ADDR_TYPE)
+ intf->timed_out_lan_commands++;
+ else
+ intf->timed_out_ipmb_commands++;
+ spin_unlock(&intf->counter_lock);
+ } else {
+ struct ipmi_smi_msg *smi_msg;
+ /* More retries, send again. */
+
+ /* Start with the max timer, set to normal
+ timer after the message is sent. */
+ ent->timeout = MAX_MSG_TIMEOUT;
+ ent->retries_left--;
+ spin_lock(&intf->counter_lock);
+ if (ent->recv_msg->addr.addr_type == IPMI_LAN_ADDR_TYPE)
+ intf->retransmitted_lan_commands++;
+ else
+ intf->retransmitted_ipmb_commands++;
+ spin_unlock(&intf->counter_lock);
+
+ smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot,
+ ent->seqid);
+ if (!smi_msg)
+ return;
+
+ spin_unlock_irqrestore(&intf->seq_lock, *flags);
+
+ /* Send the new message. We send with a zero
+ * priority. It timed out, I doubt time is
+ * that critical now, and high priority
+ * messages are really only for messages to the
+ * local MC, which don't get resent. */
+ handlers = intf->handlers;
+ if (handlers)
+ intf->handlers->sender(intf->send_info,
+ smi_msg, 0);
+ else
+ ipmi_free_smi_msg(smi_msg);
+
+ spin_lock_irqsave(&intf->seq_lock, *flags);
+ }
+}
+
+static void ipmi_timeout_handler(long timeout_period)
{
ipmi_smi_t intf;
struct list_head timeouts;
struct ipmi_recv_msg *msg, *msg2;
struct ipmi_smi_msg *smi_msg, *smi_msg2;
unsigned long flags;
- int i, j;
-
- INIT_LIST_HEAD(&timeouts);
-
- spin_lock(&interfaces_lock);
- for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
- intf = ipmi_interfaces[i];
- if (intf == NULL)
- continue;
-
- read_lock(&(intf->users_lock));
+ int i;
+ rcu_read_lock();
+ list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
/* See if any waiting messages need to be processed. */
- spin_lock_irqsave(&(intf->waiting_msgs_lock), flags);
- list_for_each_entry_safe(smi_msg, smi_msg2, &(intf->waiting_msgs), link) {
- if (! handle_new_recv_msg(intf, smi_msg)) {
+ spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
+ list_for_each_entry_safe(smi_msg, smi_msg2,
+ &intf->waiting_msgs, link) {
+ if (!handle_new_recv_msg(intf, smi_msg)) {
list_del(&smi_msg->link);
ipmi_free_smi_msg(smi_msg);
} else {
break;
}
}
- spin_unlock_irqrestore(&(intf->waiting_msgs_lock), flags);
+ spin_unlock_irqrestore(&intf->waiting_msgs_lock, flags);
/* Go through the seq table and find any messages that
have timed out, putting them in the timeouts
list. */
- spin_lock_irqsave(&(intf->seq_lock), flags);
- for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++) {
- struct seq_table *ent = &(intf->seq_table[j]);
- if (!ent->inuse)
- continue;
-
- ent->timeout -= timeout_period;
- if (ent->timeout > 0)
- continue;
-
- 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);
- spin_lock(&intf->counter_lock);
- if (ent->broadcast)
- intf->timed_out_ipmb_broadcasts++;
- else if (ent->recv_msg->addr.addr_type
- == IPMI_LAN_ADDR_TYPE)
- intf->timed_out_lan_commands++;
- else
- intf->timed_out_ipmb_commands++;
- spin_unlock(&intf->counter_lock);
- } else {
- struct ipmi_smi_msg *smi_msg;
- /* More retries, send again. */
-
- /* Start with the max timer, set to normal
- timer after the message is sent. */
- ent->timeout = MAX_MSG_TIMEOUT;
- ent->retries_left--;
- spin_lock(&intf->counter_lock);
- if (ent->recv_msg->addr.addr_type
- == IPMI_LAN_ADDR_TYPE)
- intf->retransmitted_lan_commands++;
- else
- intf->retransmitted_ipmb_commands++;
- spin_unlock(&intf->counter_lock);
- smi_msg = smi_from_recv_msg(intf,
- ent->recv_msg, j, ent->seqid);
- if (! smi_msg)
- continue;
-
- 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. */
- intf->handlers->sender(intf->send_info,
- smi_msg, 0);
- spin_lock_irqsave(&(intf->seq_lock), flags);
+ INIT_LIST_HEAD(&timeouts);
+ spin_lock_irqsave(&intf->seq_lock, flags);
+ for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++)
+ check_msg_timeout(intf, &(intf->seq_table[i]),
+ &timeouts, timeout_period, i,
+ &flags);
+ spin_unlock_irqrestore(&intf->seq_lock, flags);
+
+ list_for_each_entry_safe(msg, msg2, &timeouts, link)
+ deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE);
+
+ /*
+ * Maintenance mode handling. Check the timeout
+ * optimistically before we claim the lock. It may
+ * mean a timeout gets missed occasionally, but that
+ * only means the timeout gets extended by one period
+ * in that case. No big deal, and it avoids the lock
+ * most of the time.
+ */
+ if (intf->auto_maintenance_timeout > 0) {
+ spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
+ if (intf->auto_maintenance_timeout > 0) {
+ intf->auto_maintenance_timeout
+ -= timeout_period;
+ if (!intf->maintenance_mode
+ && (intf->auto_maintenance_timeout <= 0))
+ {
+ intf->maintenance_mode_enable = 0;
+ maintenance_mode_update(intf);
+ }
}
+ spin_unlock_irqrestore(&intf->maintenance_mode_lock,
+ flags);
}
- spin_unlock_irqrestore(&(intf->seq_lock), flags);
-
- list_for_each_entry_safe(msg, msg2, &timeouts, link) {
- handle_msg_timeout(msg);
- }
-
- read_unlock(&(intf->users_lock));
}
- spin_unlock(&interfaces_lock);
+ rcu_read_unlock();
}
static void ipmi_request_event(void)
{
- ipmi_smi_t intf;
- int i;
+ ipmi_smi_t intf;
+ struct ipmi_smi_handlers *handlers;
- spin_lock(&interfaces_lock);
- for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
- intf = ipmi_interfaces[i];
- if (intf == NULL)
+ rcu_read_lock();
+ /* Called from the timer, no need to check if handlers is
+ * valid. */
+ list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
+ /* No event requests when in maintenance mode. */
+ if (intf->maintenance_mode_enable)
continue;
- intf->handlers->request_events(intf->send_info);
+ handlers = intf->handlers;
+ if (handlers)
+ handlers->request_events(intf->send_info);
}
- spin_unlock(&interfaces_lock);
+ rcu_read_unlock();
}
static struct timer_list ipmi_timer;
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);
+}
+
#ifdef CONFIG_IPMI_PANIC_EVENT
static void dummy_smi_done_handler(struct ipmi_smi_msg *msg)
struct kernel_ipmi_msg msg;
ipmi_smi_t intf;
unsigned char data[16];
- int i;
struct ipmi_system_interface_addr *si;
struct ipmi_addr addr;
struct ipmi_smi_msg smi_msg;
msg.cmd = 2; /* Platform event command. */
msg.data = data;
msg.data_len = 8;
- data[0] = 0x21; /* Kernel generator ID, IPMI table 5-4 */
+ 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 */
recv_msg.done = dummy_recv_done_handler;
/* For every registered interface, send the event. */
- for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
- intf = ipmi_interfaces[i];
- if (intf == NULL)
+ list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
+ if (!intf->handlers)
+ /* Interface is not ready. */
continue;
/* Send the event announcing the panic. */
if (!str)
return;
- for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
+ /* 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;
- intf = ipmi_interfaces[i];
- if (intf == NULL)
+ 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
}
#endif /* CONFIG_IPMI_PANIC_EVENT */
-static int has_paniced = 0;
+static int has_panicked;
static int panic_event(struct notifier_block *this,
unsigned long event,
void *ptr)
{
- int i;
ipmi_smi_t intf;
- if (has_paniced)
+ if (has_panicked)
return NOTIFY_DONE;
- has_paniced = 1;
+ has_panicked = 1;
/* For every registered interface, set it to run to completion. */
- for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
- intf = ipmi_interfaces[i];
- if (intf == NULL)
+ list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
+ if (!intf->handlers)
+ /* Interface is not ready. */
continue;
intf->handlers->set_run_to_completion(intf->send_info, 1);
static int ipmi_init_msghandler(void)
{
- int i;
+ int rv;
if (initialized)
return 0;
+ rv = driver_register(&ipmidriver);
+ if (rv) {
+ printk(KERN_ERR PFX "Could not register IPMI driver\n");
+ return rv;
+ }
+
printk(KERN_INFO "ipmi message handler version "
IPMI_DRIVER_VERSION "\n");
- for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
- ipmi_interfaces[i] = NULL;
- }
-
#ifdef CONFIG_PROC_FS
proc_ipmi_root = proc_mkdir("ipmi", NULL);
if (!proc_ipmi_root) {
proc_ipmi_root->owner = THIS_MODULE;
#endif /* CONFIG_PROC_FS */
- init_timer(&ipmi_timer);
- ipmi_timer.data = 0;
- ipmi_timer.function = ipmi_timeout;
- ipmi_timer.expires = jiffies + IPMI_TIMEOUT_JIFFIES;
- add_timer(&ipmi_timer);
+ setup_timer(&ipmi_timer, ipmi_timeout, 0);
+ mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
- notifier_chain_register(&panic_notifier_list, &panic_block);
+ atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
initialized = 1;
if (!initialized)
return;
- notifier_chain_unregister(&panic_notifier_list, &panic_block);
+ 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. */
remove_proc_entry(proc_ipmi_root->name, &proc_root);
#endif /* CONFIG_PROC_FS */
+ driver_unregister(&ipmidriver);
+
initialized = 0;
/* Check for buffer leaks. */
EXPORT_SYMBOL(ipmi_set_my_LUN);
EXPORT_SYMBOL(ipmi_get_my_LUN);
EXPORT_SYMBOL(ipmi_smi_add_proc_entry);
-EXPORT_SYMBOL(proc_ipmi_root);
EXPORT_SYMBOL(ipmi_user_set_run_to_completion);
+EXPORT_SYMBOL(ipmi_free_recv_msg);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff