#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_MSGHANDLER_VERSION "v33"
+
+#define IPMI_DRIVER_VERSION "39.0"
static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void);
static int ipmi_init_msghandler(void);
static int initialized = 0;
-static struct proc_dir_entry *proc_ipmi_root = NULL;
+#ifdef CONFIG_PROC_FS
+struct proc_dir_entry *proc_ipmi_root = NULL;
+EXPORT_SYMBOL(proc_ipmi_root);
+#endif /* CONFIG_PROC_FS */
#define MAX_EVENTS_IN_QUEUE 25
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;
+
+ /*
+ * 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
do { \
seq = ((msgid >> 26) & 0x3f); \
seqid = (msgid & 0x3fffff); \
- } while(0)
+ } while (0)
#define NEXT_SEQID(seqid) (((seqid) + 1) & 0x3fffff)
{
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;
+};
#define IPMI_IPMB_NUM_SEQ 64
-#define IPMI_MAX_CHANNELS 8
+#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;
+
+ /* The list of upper layers that are using me. seq_lock
+ * protects this. */
+ struct list_head users;
/* 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;
/* This is the lower-layer's sender routine. */
struct ipmi_smi_handlers *handlers;
void *send_info;
+#ifdef CONFIG_PROC_FS
/* A list of proc entries for this interface. This does not
need a lock, only one thread creates it and only one thread
destroys it. */
+ spinlock_t 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
/* 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
struct list_head waiting_events;
unsigned int waiting_events_count; /* How many events in queue? */
- /* This will be non-null if someone registers to receive all
- IPMI commands (this is for interface emulation). There
- may not be any things in the cmd_rcvrs list above when
- this is registered. */
- ipmi_user_t all_cmd_rcvr;
-
- /* My slave address. This is initialized to IPMI_BMC_SLAVE_ADDR,
- but may be changed by the user. */
- unsigned char my_address;
-
- /* My LUN. This should generally stay the SMS LUN, but just in
- case... */
- unsigned char my_lun;
-
/* The event receiver for my BMC, only really used at panic
shutdown as a place to store this. */
unsigned char event_receiver;
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_smi_msg *msg);
+ 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. */
/* 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)
+
+/* Used to mark an interface entry that cannot be used but is not a
+ * free entry, either, primarily used at creation and deletion time so
+ * a slot doesn't get reused too quickly. */
+#define IPMI_INVALID_INTERFACE_ENTRY ((ipmi_smi_t) ((long) 1))
+#define IPMI_INVALID_INTERFACE(i) (((i) == NULL) \
+ || (i == IPMI_INVALID_INTERFACE_ENTRY))
+
+/**
+ * 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);
#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);
-
-/* Directly protects the ipmi_interfaces data structure. This is
- claimed in the timer interrupt. */
+/* Directly protects the ipmi_interfaces data structure. */
static DEFINE_SPINLOCK(interfaces_lock);
/* List of watchers that want to know when smi's are added and
static struct list_head smi_watchers = LIST_HEAD_INIT(smi_watchers);
static DECLARE_RWSEM(smi_watchers_sem);
+
+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 clean_up_interface_data(ipmi_smi_t intf)
+{
+ int i;
+ struct cmd_rcvr *rcvr, *rcvr2;
+ struct list_head list;
+
+ free_recv_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);
+ list_add_rcu(&list, &intf->cmd_rcvrs);
+ list_del_rcu(&intf->cmd_rcvrs);
+ mutex_unlock(&intf->cmd_rcvrs_mutex);
+ synchronize_rcu();
+
+ 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);
+}
+
int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher)
{
- int i;
+ int i;
+ unsigned long flags;
- 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);
- }
- }
up_write(&smi_watchers_sem);
- up_read(&interfaces_sem);
+ spin_lock_irqsave(&interfaces_lock, flags);
+ for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
+ ipmi_smi_t intf = ipmi_interfaces[i];
+ if (IPMI_INVALID_INTERFACE(intf))
+ continue;
+ spin_unlock_irqrestore(&interfaces_lock, flags);
+ watcher->new_smi(i, intf->si_dev);
+ spin_lock_irqsave(&interfaces_lock, flags);
+ }
+ spin_unlock_irqrestore(&interfaces_lock, flags);
return 0;
}
}
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);
}
}
}
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)
{
- msg->user->handler->ipmi_recv_hndl(msg, msg->user->handler_data);
+ if (!msg->user) {
+ ipmi_smi_t intf = msg->user_msg_data;
+ unsigned long flags;
+
+ /* Special handling for NULL users. */
+ if (intf->null_user_handler) {
+ intf->null_user_handler(intf, msg);
+ spin_lock_irqsave(&intf->counter_lock, flags);
+ intf->handled_local_responses++;
+ spin_unlock_irqrestore(&intf->counter_lock, flags);
+ } else {
+ /* No handler, so give up. */
+ spin_lock_irqsave(&intf->counter_lock, flags);
+ intf->unhandled_local_responses++;
+ spin_unlock_irqrestore(&intf->counter_lock, flags);
+ }
+ ipmi_free_recv_msg(msg);
+ } else {
+ ipmi_user_t user = msg->user;
+ user->handler->ipmi_recv_hndl(msg, user->handler_data);
+ }
}
/* Find the next sequence number not being used and add the given
int rv = 0;
unsigned int i;
- for (i=intf->curr_seq;
+ for (i = intf->curr_seq;
(i+1)%IPMI_IPMB_NUM_SEQ != intf->curr_seq;
- i=(i+1)%IPMI_IPMB_NUM_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
}
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)
- {
+ spin_lock_irqsave(&interfaces_lock, flags);
+ intf = ipmi_interfaces[if_num];
+ if ((if_num >= MAX_IPMI_INTERFACES) || IPMI_INVALID_INTERFACE(intf)) {
+ spin_unlock_irqrestore(&interfaces_lock, flags);
rv = -EINVAL;
- goto out_unlock;
+ goto out_kfree;
}
- intf = ipmi_interfaces[if_num];
+ /* Note that each existing user holds a refcount to the interface. */
+ kref_get(&intf->refcount);
+ spin_unlock_irqrestore(&interfaces_lock, flags);
+ 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);
-
- 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:
+ 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))
+ for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) {
+ 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;
}
}
- spin_unlock_irqrestore(&(user->intf->seq_lock), flags);
+ spin_unlock_irqrestore(&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) {
+ /*
+ * 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);
+ mutex_unlock(&intf->cmd_rcvrs_mutex);
+ synchronize_rcu();
+ while (rcvrs) {
+ rcvr = rcvrs;
+ rcvrs = rcvr->next;
+ kfree(rcvr);
+ }
- out_unlock:
+ module_put(intf->handlers->owner);
+ if (intf->handlers->dec_usecount)
+ intf->handlers->dec_usecount(intf->send_info);
- return rv;
-}
+ kref_put(&intf->refcount, intf_free);
-int ipmi_destroy_user(ipmi_user_t user)
-{
- int rv;
- ipmi_smi_t intf = user->intf;
- unsigned long flags;
+ kref_put(&user->refcount, free_user);
- down_read(&interfaces_sem);
- write_lock_irqsave(&intf->users_lock, flags);
- rv = ipmi_destroy_user_nolock(user);
- if (!rv) {
- 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;
+ 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 = ipmi_version_major(&user->intf->bmc->id);
+ *minor = ipmi_version_minor(&user->intf->bmc->id);
}
-void ipmi_set_my_address(ipmi_user_t user,
- unsigned char address)
+int ipmi_set_my_address(ipmi_user_t user,
+ unsigned int channel,
+ unsigned char address)
{
- user->intf->my_address = address;
+ if (channel >= IPMI_MAX_CHANNELS)
+ return -EINVAL;
+ user->intf->channels[channel].address = address;
+ return 0;
}
-unsigned char ipmi_get_my_address(ipmi_user_t user)
+int ipmi_get_my_address(ipmi_user_t user,
+ unsigned int channel,
+ unsigned char *address)
{
- return user->intf->my_address;
+ if (channel >= IPMI_MAX_CHANNELS)
+ return -EINVAL;
+ *address = user->intf->channels[channel].address;
+ return 0;
}
-void ipmi_set_my_LUN(ipmi_user_t user,
- unsigned char LUN)
+int ipmi_set_my_LUN(ipmi_user_t user,
+ unsigned int channel,
+ unsigned char LUN)
{
- user->intf->my_lun = LUN & 0x3;
+ if (channel >= IPMI_MAX_CHANNELS)
+ return -EINVAL;
+ user->intf->channels[channel].lun = LUN & 0x3;
+ return 0;
}
-unsigned char ipmi_get_my_LUN(ipmi_user_t user)
+int ipmi_get_my_LUN(ipmi_user_t user,
+ unsigned int channel,
+ unsigned char *address)
{
- return user->intf->my_lun;
+ if (channel >= IPMI_MAX_CHANNELS)
+ return -EINVAL;
+ *address = user->intf->channels[channel].lun;
+ return 0;
}
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_for_each_entry_safe(msg, msg2, &intf->waiting_events,
+ link) {
list_del(&msg->link);
- msg->user = user;
- deliver_response(msg);
+ list_add_tail(&msg->link, &msgs);
}
+ intf->waiting_events_count = 0;
}
-
- spin_unlock_irqrestore(&(user->intf->events_lock), flags);
- read_unlock(&(user->intf->users_lock));
+
+ /* Hold the events lock while doing this to preserve order. */
+ list_for_each_entry_safe(msg, msg2, &msgs, link) {
+ msg->user = user;
+ kref_get(&user->refcount);
+ deliver_response(msg);
+ }
+
+ 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)
+{
+ struct cmd_rcvr *rcvr;
+
+ list_for_each_entry_rcu(rcvr, &intf->cmd_rcvrs, link) {
+ if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd))
+ return rcvr;
+ }
+ return NULL;
+}
+
int ipmi_register_for_cmd(ipmi_user_t user,
unsigned char netfn,
unsigned char cmd)
{
- struct cmd_rcvr *cmp;
- unsigned long flags;
- struct cmd_rcvr *rcvr;
- int rv = 0;
+ ipmi_smi_t intf = user->intf;
+ struct cmd_rcvr *rcvr;
+ struct cmd_rcvr *entry;
+ int rv = 0;
rcvr = kmalloc(sizeof(*rcvr), GFP_KERNEL);
- if (! rcvr)
+ if (!rcvr)
return -ENOMEM;
+ rcvr->cmd = cmd;
+ rcvr->netfn = netfn;
+ rcvr->user = user;
- read_lock(&(user->intf->users_lock));
- write_lock_irqsave(&(user->intf->cmd_rcvr_lock), flags);
- if (user->intf->all_cmd_rcvr != NULL) {
+ mutex_lock(&intf->cmd_rcvrs_mutex);
+ /* Make sure the command/netfn is not already registered. */
+ entry = find_cmd_rcvr(intf, netfn, cmd);
+ if (entry) {
rv = -EBUSY;
goto out_unlock;
}
- /* 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;
- }
- }
+ list_add_rcu(&rcvr->link, &intf->cmd_rcvrs);
- if (! rv) {
- rcvr->cmd = cmd;
- rcvr->netfn = netfn;
- rcvr->user = user;
- list_add_tail(&(rcvr->link), &(user->intf->cmd_rcvrs));
- }
out_unlock:
- write_unlock_irqrestore(&(user->intf->cmd_rcvr_lock), flags);
- read_unlock(&(user->intf->users_lock));
-
+ mutex_unlock(&intf->cmd_rcvrs_mutex);
if (rv)
kfree(rcvr);
unsigned char netfn,
unsigned char cmd)
{
- unsigned long flags;
- struct cmd_rcvr *rcvr;
- int rv = -ENOENT;
+ ipmi_smi_t intf = user->intf;
+ struct cmd_rcvr *rcvr;
- 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(rcvr, &(user->intf->cmd_rcvrs), link) {
- if ((rcvr->netfn == netfn) && (rcvr->cmd == cmd)) {
- rv = 0;
- list_del(&rcvr->link);
- kfree(rcvr);
- break;
- }
+ rcvr = find_cmd_rcvr(intf, netfn, cmd);
+ if ((rcvr) && (rcvr->user == user)) {
+ list_del_rcu(&rcvr->link);
+ mutex_unlock(&intf->cmd_rcvrs_mutex);
+ synchronize_rcu();
+ kfree(rcvr);
+ return 0;
+ } else {
+ mutex_unlock(&intf->cmd_rcvrs_mutex);
+ return -ENOENT;
}
- write_unlock_irqrestore(&(user->intf->cmd_rcvr_lock), flags);
- read_unlock(&(user->intf->users_lock));
-
- 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;
+ 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;
}
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. */
long seqid;
int broadcast = 0;
- if (addr->channel > IPMI_NUM_CHANNELS) {
- spin_lock_irqsave(&intf->counter_lock, flags);
+ if (addr->channel >= IPMI_MAX_CHANNELS) {
+ spin_lock_irqsave(&intf->counter_lock, flags);
intf->sent_invalid_commands++;
spin_unlock_irqrestore(&intf->counter_lock, flags);
rv = -EINVAL;
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);
#ifdef DEBUG_MSGING
{
int m;
- for (m=0; m<smi_msg->data_size; m++)
+ for (m = 0; m < smi_msg->data_size; m++)
printk(" %2.2x", smi_msg->data[m]);
printk("\n");
}
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,
int retries,
unsigned int retry_time_ms)
{
+ unsigned char saddr, lun;
+ int rv;
+
+ if (!user)
+ return -EINVAL;
+ rv = check_addr(user->intf, addr, &saddr, &lun);
+ if (rv)
+ return rv;
return i_ipmi_request(user,
user->intf,
addr,
user_msg_data,
NULL, NULL,
priority,
- user->intf->my_address,
- user->intf->my_lun,
+ saddr,
+ lun,
retries,
retry_time_ms);
}
struct ipmi_recv_msg *supplied_recv,
int priority)
{
+ unsigned char saddr, lun;
+ int rv;
+
+ if (!user)
+ return -EINVAL;
+ rv = check_addr(user->intf, addr, &saddr, &lun);
+ if (rv)
+ return rv;
return i_ipmi_request(user,
user->intf,
addr,
supplied_smi,
supplied_recv,
priority,
- user->intf->my_address,
- user->intf->my_lun,
+ saddr,
+ lun,
-1, 0);
}
{
char *out = (char *) page;
ipmi_smi_t intf = data;
+ int i;
+ int rv = 0;
- return sprintf(out, "%x\n", intf->my_address);
+ for (i = 0; i < IPMI_MAX_CHANNELS; i++)
+ rv += sprintf(out+rv, "%x ", intf->channels[i].address);
+ out[rv-1] = '\n'; /* Replace the final space with a newline */
+ out[rv] = '\0';
+ rv++;
+ return rv;
}
static int version_file_read_proc(char *page, char **start, off_t off,
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,
read_proc_t *read_proc, write_proc_t *write_proc,
void *data, struct module *owner)
{
- struct proc_dir_entry *file;
int rv = 0;
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *file;
struct ipmi_proc_entry *entry;
/* Create a list element. */
file->write_proc = write_proc;
file->owner = owner;
+ spin_lock(&smi->proc_entry_lock);
/* Stick it on the list. */
entry->next = smi->proc_entries;
smi->proc_entries = entry;
+ spin_unlock(&smi->proc_entry_lock);
}
+#endif /* CONFIG_PROC_FS */
return rv;
}
{
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 = ipmi_smi_add_proc_entry(smi, "version",
version_file_read_proc, NULL,
smi, THIS_MODULE);
+#endif /* CONFIG_PROC_FS */
return rv;
}
static void remove_proc_entries(ipmi_smi_t smi)
{
+#ifdef CONFIG_PROC_FS
struct ipmi_proc_entry *entry;
+ spin_lock(&smi->proc_entry_lock);
while (smi->proc_entries) {
entry = smi->proc_entries;
smi->proc_entries = entry->next;
kfree(entry->name);
kfree(entry);
}
+ spin_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.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 char 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
+cleanup_bmc_device(struct kref *ref)
+{
+ struct bmc_device *bmc;
+
+ bmc = container_of(ref, struct bmc_device, refcount);
+
+ 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);
+ platform_device_unregister(bmc->dev);
+ kfree(bmc);
+}
+
+static void ipmi_bmc_unregister(ipmi_smi_t intf)
+{
+ struct bmc_device *bmc = intf->bmc;
+
+ sysfs_remove_link(&intf->si_dev->kobj, "bmc");
+ 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);
+ mutex_unlock(&ipmidriver_mutex);
+}
+
+static int ipmi_bmc_register(ipmi_smi_t intf)
+{
+ 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 {
+ bmc->dev = platform_device_alloc("ipmi_bmc",
+ bmc->id.device_id);
+ if (!bmc->dev) {
+ 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_register(bmc->dev);
+ mutex_unlock(&ipmidriver_mutex);
+ if (rv) {
+ 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;
+ }
+
+ bmc->device_id_attr.attr.name = "device_id";
+ bmc->device_id_attr.attr.owner = THIS_MODULE;
+ 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.owner = THIS_MODULE;
+ 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.owner = THIS_MODULE;
+ 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.owner = THIS_MODULE;
+ 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.owner = THIS_MODULE;
+ 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.owner = THIS_MODULE;
+ 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.owner = THIS_MODULE;
+ 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.owner = THIS_MODULE;
+ 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.owner = THIS_MODULE;
+ 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.owner = THIS_MODULE;
+ bmc->aux_firmware_rev_attr.attr.mode = S_IRUGO;
+ bmc->aux_firmware_rev_attr.show = aux_firmware_rev_show;
+
+ device_create_file(&bmc->dev->dev,
+ &bmc->device_id_attr);
+ device_create_file(&bmc->dev->dev,
+ &bmc->provides_dev_sdrs_attr);
+ device_create_file(&bmc->dev->dev,
+ &bmc->revision_attr);
+ device_create_file(&bmc->dev->dev,
+ &bmc->firmware_rev_attr);
+ device_create_file(&bmc->dev->dev,
+ &bmc->version_attr);
+ device_create_file(&bmc->dev->dev,
+ &bmc->add_dev_support_attr);
+ device_create_file(&bmc->dev->dev,
+ &bmc->manufacturer_id_attr);
+ device_create_file(&bmc->dev->dev,
+ &bmc->product_id_attr);
+ if (bmc->id.aux_firmware_revision_set)
+ device_create_file(&bmc->dev->dev,
+ &bmc->aux_firmware_rev_attr);
+ if (bmc->guid_set)
+ device_create_file(&bmc->dev->dev,
+ &bmc->guid_attr);
+
+ 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.
+ */
+ rv = sysfs_create_link(&intf->si_dev->kobj,
+ &bmc->dev->dev.kobj, "bmc");
+ if (rv) {
+ printk(KERN_ERR
+ "ipmi_msghandler: Unable to create bmc symlink: %d\n",
+ rv);
+ goto out_err;
+ }
+
+ size = snprintf(dummy, 0, "ipmi%d", intf->intf_num);
+ intf->my_dev_name = kmalloc(size+1, GFP_KERNEL);
+ if (!intf->my_dev_name) {
+ 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", intf->intf_num);
+
+ rv = sysfs_create_link(&bmc->dev->dev.kobj, &intf->si_dev->kobj,
+ intf->my_dev_name);
+ if (rv) {
+ 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
(struct ipmi_addr *) &si,
0,
&msg,
- NULL,
+ intf,
NULL,
NULL,
0,
- intf->my_address,
- intf->my_lun,
+ intf->channels[0].address,
+ intf->channels[0].lun,
-1, 0);
}
static void
-channel_handler(ipmi_smi_t intf, struct ipmi_smi_msg *msg)
+channel_handler(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
{
int rv = 0;
int chan;
- if ((msg->rsp[0] == (IPMI_NETFN_APP_RESPONSE << 2))
- && (msg->rsp[1] == IPMI_GET_CHANNEL_INFO_CMD))
+ 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->rsp[2] != 0) {
+ if (msg->msg.data[0] != 0) {
/* Got an error from the channel, just go on. */
- if (msg->rsp[2] == IPMI_INVALID_COMMAND_ERR) {
+ 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
}
goto next_channel;
}
- if (msg->rsp_size < 6) {
+ 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->rsp[4] & 0x7f;
- intf->channels[chan].protocol = msg->rsp[5] & 0x1f;
+ intf->channels[chan].medium = msg->msg.data[2] & 0x7f;
+ intf->channels[chan].protocol = msg->msg.data[3] & 0x1f;
next_channel:
intf->curr_channel++;
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,
+ unsigned char slave_addr)
{
int i, j;
int rv;
- ipmi_smi_t new_intf;
+ ipmi_smi_t intf;
unsigned long flags;
+ int version_major;
+ int version_minor;
+ version_major = ipmi_version_major(device_id);
+ version_minor = ipmi_version_minor(device_id);
/* 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 = kmalloc(sizeof(*intf), GFP_KERNEL);
+ if (!intf)
return -ENOMEM;
- memset(new_intf, 0, sizeof(*new_intf));
-
- new_intf->proc_dir = NULL;
+ memset(intf, 0, sizeof(*intf));
+ intf->bmc = kzalloc(sizeof(*intf->bmc), GFP_KERNEL);
+ if (!intf->bmc) {
+ kfree(intf);
+ return -ENOMEM;
+ }
+ intf->intf_num = -1;
+ 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);
+ INIT_LIST_HEAD(&intf->cmd_rcvrs);
+ init_waitqueue_head(&intf->waitq);
+
+ spin_lock_init(&intf->counter_lock);
+ intf->proc_dir = NULL;
rv = -ENOMEM;
-
- down_write(&interfaces_sem);
- for (i=0; i<MAX_IPMI_INTERFACES; i++) {
+ spin_lock_irqsave(&interfaces_lock, flags);
+ 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;
- if (slave_addr == 0)
- new_intf->my_address = IPMI_BMC_SLAVE_ADDR;
- else
- new_intf->my_address = slave_addr;
- new_intf->my_lun = 2; /* the SMS LUN. */
- 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;
- 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));
- new_intf->all_cmd_rcvr = NULL;
-
- 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->intf_num = i;
+ /* Reserve the entry till we are done. */
+ ipmi_interfaces[i] = IPMI_INVALID_INTERFACE_ENTRY;
rv = 0;
- *intf = new_intf;
break;
}
}
+ spin_unlock_irqrestore(&interfaces_lock, flags);
+ if (rv)
+ goto out;
- 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 ((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;
- /* 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);
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);
+ kref_put(&intf->refcount, intf_free);
+ if (i < MAX_IPMI_INTERFACES) {
+ spin_lock_irqsave(&interfaces_lock, flags);
+ ipmi_interfaces[i] = NULL;
+ spin_unlock_irqrestore(&interfaces_lock, flags);
+ }
+ } else {
+ spin_lock_irqsave(&interfaces_lock, flags);
+ ipmi_interfaces[i] = intf;
+ spin_unlock_irqrestore(&interfaces_lock, flags);
+ call_smi_watchers(i, intf->si_dev);
}
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)
-{
- 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));
-
- 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);
- }
- }
-}
-
int ipmi_unregister_smi(ipmi_smi_t intf)
{
- int rv = -ENODEV;
int i;
struct ipmi_smi_watcher *w;
unsigned long flags;
- 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;
- }
+ ipmi_bmc_unregister(intf);
+
+ spin_lock_irqsave(&interfaces_lock, flags);
+ for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
+ if (ipmi_interfaces[i] == intf) {
+ /* Set the interface number reserved until we
+ * are done. */
+ ipmi_interfaces[i] = IPMI_INVALID_INTERFACE_ENTRY;
+ intf->intf_num = -1;
+ break;
}
- } else {
- rv = -EBUSY;
}
- up_write(&interfaces_sem);
+ spin_unlock_irqrestore(&interfaces_lock,flags);
- return rv;
+ if (i == MAX_IPMI_INTERFACES)
+ return -ENODEV;
- 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) {
+ list_for_each_entry(w, &smi_watchers, link)
w->smi_gone(i);
- }
up_read(&smi_watchers_sem);
- up_read(&interfaces_sem);
+
+ /* Allow the entry to be reused now. */
+ spin_lock_irqsave(&interfaces_lock, flags);
+ ipmi_interfaces[i] = NULL;
+ spin_unlock_irqrestore(&interfaces_lock,flags);
+
+ 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;
+ ipmi_user_t user = NULL;
+ struct ipmi_ipmb_addr *ipmb_addr;
+ struct ipmi_recv_msg *recv_msg;
+ unsigned long flags;
if (msg->rsp_size < 10) {
/* Message not big enough, just ignore it. */
netfn = msg->rsp[4] >> 2;
cmd = msg->rsp[8];
- read_lock(&(intf->cmd_rcvr_lock));
-
- if (intf->all_cmd_rcvr) {
- user = intf->all_cmd_rcvr;
- } else {
- /* 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);
+ 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. */
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->my_address;
+ 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 */
{
int m;
printk("Invalid command:");
- for (m=0; m<msg->data_size; m++)
+ for (m = 0; m < msg->data_size; m++)
printk(" %2.2x", msg->data[m]);
printk("\n");
}
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;
+ 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];
- read_lock(&(intf->cmd_rcvr_lock));
-
- if (intf->all_cmd_rcvr) {
- user = intf->all_cmd_rcvr;
- } else {
- /* 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);
+ 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;
-
- /* 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 (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;
}
- if (!found) {
- /* Special handling for NULL users. */
- if (!recv_msg->user && intf->null_user_handler){
- intf->null_user_handler(intf, msg);
- spin_lock_irqsave(&intf->counter_lock, flags);
- intf->handled_local_responses++;
- spin_unlock_irqrestore(&intf->counter_lock, flags);
- }else{
- /* The user for the message went away, so give up. */
- spin_lock_irqsave(&intf->counter_lock, flags);
- intf->unhandled_local_responses++;
- spin_unlock_irqrestore(&intf->counter_lock, flags);
- }
+ user = recv_msg->user;
+ /* Make sure the user still exists. */
+ 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++;
+ spin_unlock_irqrestore(&intf->counter_lock, flags);
ipmi_free_recv_msg(recv_msg);
} else {
struct ipmi_system_interface_addr *smi_addr;
#ifdef DEBUG_MSGING
int m;
printk("Recv:");
- for (m=0; m<msg->rsp_size; m++)
+ for (m = 0; m < msg->rsp_size; m++)
printk(" %2.2x", msg->rsp[m]);
printk("\n");
#endif
{
/* 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
}
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
{
int m;
printk("Resend: ");
- for (m=0; m<smi_msg->data_size; m++)
+ for (m = 0; m < smi_msg->data_size; m++)
printk(" %2.2x", smi_msg->data[m]);
printk("\n");
}
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;
+
+ 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. */
+ intf->handlers->sender(intf->send_info,
+ smi_msg, 0);
+ spin_lock_irqsave(&intf->seq_lock, *flags);
+ }
+}
+
+static void ipmi_timeout_handler(long timeout_period)
{
ipmi_smi_t intf;
struct list_head timeouts;
INIT_LIST_HEAD(&timeouts);
spin_lock(&interfaces_lock);
- for (i=0; i<MAX_IPMI_INTERFACES; i++) {
+ for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
intf = ipmi_interfaces[i];
- if (intf == NULL)
+ if (IPMI_INVALID_INTERFACE(intf))
continue;
-
- read_lock(&(intf->users_lock));
+ kref_get(&intf->refcount);
+ spin_unlock(&interfaces_lock);
/* 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);
- }
- }
- spin_unlock_irqrestore(&(intf->seq_lock), flags);
-
- list_for_each_entry_safe(msg, msg2, &timeouts, link) {
+ spin_lock_irqsave(&intf->seq_lock, flags);
+ for (j = 0; j < IPMI_IPMB_NUM_SEQ; j++)
+ check_msg_timeout(intf, &(intf->seq_table[j]),
+ &timeouts, timeout_period, j,
+ &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));
+ kref_put(&intf->refcount, intf_free);
+ spin_lock(&interfaces_lock);
}
spin_unlock(&interfaces_lock);
}
int i;
spin_lock(&interfaces_lock);
- for (i=0; i<MAX_IPMI_INTERFACES; i++) {
+ for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
intf = ipmi_interfaces[i];
- if (intf == NULL)
+ if (IPMI_INVALID_INTERFACE(intf))
continue;
intf->handlers->request_events(intf->send_info);
the queue and this silliness can go away. */
#define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME))
-static volatile int stop_operation = 0;
-static volatile int timer_stopped = 0;
+static atomic_t stop_operation;
static unsigned int ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
static void ipmi_timeout(unsigned long data)
{
- if (stop_operation) {
- timer_stopped = 1;
+ if (atomic_read(&stop_operation))
return;
- }
ticks_to_req_ev--;
if (ticks_to_req_ev == 0) {
ipmi_timeout_handler(IPMI_TIMEOUT_TIME);
- ipmi_timer.expires += IPMI_TIMEOUT_JIFFIES;
- add_timer(&ipmi_timer);
+ mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
}
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)
}
#ifdef CONFIG_IPMI_PANIC_STRING
-static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_smi_msg *msg)
+static void event_receiver_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
{
- if ((msg->rsp[0] == (IPMI_NETFN_SENSOR_EVENT_RESPONSE << 2))
- && (msg->rsp[1] == IPMI_GET_EVENT_RECEIVER_CMD)
- && (msg->rsp[2] == IPMI_CC_NO_ERROR))
+ 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->rsp[3];
- intf->event_receiver_lun = msg->rsp[4] & 0x3;
+ 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_smi_msg *msg)
+static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
{
- if ((msg->rsp[0] == (IPMI_NETFN_APP_RESPONSE << 2))
- && (msg->rsp[1] == IPMI_GET_DEVICE_ID_CMD)
- && (msg->rsp[2] == IPMI_CC_NO_ERROR))
+ 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->rsp[8] >> 2) & 1;
- intf->local_event_generator = (msg->rsp[8] >> 5) & 1;
+ intf->local_sel_device = (msg->msg.data[6] >> 2) & 1;
+ intf->local_event_generator = (msg->msg.data[6] >> 5) & 1;
}
}
#endif
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++) {
+ for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
intf = ipmi_interfaces[i];
- if (intf == NULL)
+ if (IPMI_INVALID_INTERFACE(intf))
continue;
/* Send the event announcing the panic. */
&addr,
0,
&msg,
- NULL,
+ intf,
&smi_msg,
&recv_msg,
0,
- intf->my_address,
- intf->my_lun,
+ intf->channels[0].address,
+ intf->channels[0].lun,
0, 1); /* Don't retry, and don't wait. */
}
if (!str)
return;
- for (i=0; i<MAX_IPMI_INTERFACES; i++) {
+ for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
char *p = str;
struct ipmi_ipmb_addr *ipmb;
int j;
intf = ipmi_interfaces[i];
- if (intf == NULL)
+ if (IPMI_INVALID_INTERFACE(intf))
continue;
/* First job here is to figure out where to send the
&addr,
0,
&msg,
- NULL,
+ intf,
&smi_msg,
&recv_msg,
0,
- intf->my_address,
- intf->my_lun,
+ intf->channels[0].address,
+ intf->channels[0].lun,
0, 1); /* Don't retry, and don't wait. */
if (intf->local_event_generator) {
&addr,
0,
&msg,
- NULL,
+ intf,
&smi_msg,
&recv_msg,
0,
- intf->my_address,
- intf->my_lun,
+ intf->channels[0].address,
+ intf->channels[0].lun,
0, 1); /* no retry, and no wait. */
}
intf->null_user_handler = NULL;
be zero, and it must not be my address. */
if (((intf->event_receiver & 1) == 0)
&& (intf->event_receiver != 0)
- && (intf->event_receiver != intf->my_address))
+ && (intf->event_receiver != intf->channels[0].address))
{
/* The event receiver is valid, send an IPMB
message. */
data[0] = 0;
data[1] = 0;
data[2] = 0xf0; /* OEM event without timestamp. */
- data[3] = intf->my_address;
+ data[3] = intf->channels[0].address;
data[4] = j++; /* sequence # */
/* Always give 11 bytes, so strncpy will fill
it with zeroes for me. */
&addr,
0,
&msg,
- NULL,
+ intf,
&smi_msg,
&recv_msg,
0,
- intf->my_address,
- intf->my_lun,
+ intf->channels[0].address,
+ intf->channels[0].lun,
0, 1); /* no retry, and no wait. */
}
}
has_paniced = 1;
/* For every registered interface, set it to run to completion. */
- for (i=0; i<MAX_IPMI_INTERFACES; i++) {
+ for (i = 0; i < MAX_IPMI_INTERFACES; i++) {
intf = ipmi_interfaces[i];
- if (intf == NULL)
+ if (IPMI_INVALID_INTERFACE(intf))
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_MSGHANDLER_VERSION "\n");
+ IPMI_DRIVER_VERSION "\n");
- for (i=0; i<MAX_IPMI_INTERFACES; i++) {
+ 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) {
printk(KERN_ERR PFX "Unable to create IPMI proc dir");
}
proc_ipmi_root->owner = THIS_MODULE;
+#endif /* CONFIG_PROC_FS */
init_timer(&ipmi_timer);
ipmi_timer.data = 0;
ipmi_timer.expires = jiffies + IPMI_TIMEOUT_JIFFIES;
add_timer(&ipmi_timer);
- 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. */
/* Tell the timer to stop, then wait for it to stop. This avoids
problems with race conditions removing the timer here. */
- stop_operation = 1;
- while (!timer_stopped) {
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(1);
- }
+ atomic_inc(&stop_operation);
+ del_timer_sync(&ipmi_timer);
+#ifdef CONFIG_PROC_FS
remove_proc_entry(proc_ipmi_root->name, &proc_root);
+#endif /* CONFIG_PROC_FS */
+
+ driver_unregister(&ipmidriver);
initialized = 0;
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);
EXPORT_SYMBOL(ipmi_create_user);
EXPORT_SYMBOL(ipmi_destroy_user);
EXPORT_SYMBOL(ipmi_get_my_LUN);
EXPORT_SYMBOL(ipmi_smi_add_proc_entry);
EXPORT_SYMBOL(ipmi_user_set_run_to_completion);
+EXPORT_SYMBOL(ipmi_free_recv_msg);
git://git.onelab.eu / linux-2.6.git / blobdiff