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-rw-r--r--drivers/char/ipmi/Kconfig12
-rw-r--r--drivers/char/ipmi/ipmi_bt_sm.c2
-rw-r--r--drivers/char/ipmi/ipmi_kcs_sm.c5
-rw-r--r--drivers/char/ipmi/ipmi_msghandler.c239
-rw-r--r--drivers/char/ipmi/ipmi_si_intf.c145
5 files changed, 251 insertions, 152 deletions
diff --git a/drivers/char/ipmi/Kconfig b/drivers/char/ipmi/Kconfig
index 0baa8fab4ea7..db1c9b7adaa6 100644
--- a/drivers/char/ipmi/Kconfig
+++ b/drivers/char/ipmi/Kconfig
@@ -50,6 +50,18 @@ config IPMI_SI
Currently, only KCS and SMIC are supported. If
you are using IPMI, you should probably say "y" here.
+config IPMI_SI_PROBE_DEFAULTS
+ bool 'Probe for all possible IPMI system interfaces by default'
+ default n
+ depends on IPMI_SI
+ help
+ Modern systems will usually expose IPMI interfaces via a discoverable
+ firmware mechanism such as ACPI or DMI. Older systems do not, and so
+ the driver is forced to probe hardware manually. This may cause boot
+ delays. Say "n" here to disable this manual probing. IPMI will then
+ only be available on older systems if the "ipmi_si_intf.trydefaults=1"
+ boot argument is passed.
+
config IPMI_WATCHDOG
tristate 'IPMI Watchdog Timer'
help
diff --git a/drivers/char/ipmi/ipmi_bt_sm.c b/drivers/char/ipmi/ipmi_bt_sm.c
index f5e4cd7617f6..61e71616689b 100644
--- a/drivers/char/ipmi/ipmi_bt_sm.c
+++ b/drivers/char/ipmi/ipmi_bt_sm.c
@@ -352,7 +352,7 @@ static inline void write_all_bytes(struct si_sm_data *bt)
static inline int read_all_bytes(struct si_sm_data *bt)
{
- unsigned char i;
+ unsigned int i;
/*
* length is "framing info", minimum = 4: NetFn, Seq, Cmd, cCode.
diff --git a/drivers/char/ipmi/ipmi_kcs_sm.c b/drivers/char/ipmi/ipmi_kcs_sm.c
index 6a4bdc18955a..8c25f596808a 100644
--- a/drivers/char/ipmi/ipmi_kcs_sm.c
+++ b/drivers/char/ipmi/ipmi_kcs_sm.c
@@ -251,8 +251,9 @@ static inline int check_obf(struct si_sm_data *kcs, unsigned char status,
if (!GET_STATUS_OBF(status)) {
kcs->obf_timeout -= time;
if (kcs->obf_timeout < 0) {
- start_error_recovery(kcs, "OBF not ready in time");
- return 1;
+ kcs->obf_timeout = OBF_RETRY_TIMEOUT;
+ start_error_recovery(kcs, "OBF not ready in time");
+ return 1;
}
return 0;
}
diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
index ec4e10fcf1a5..e6db9381b2c7 100644
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -55,6 +55,7 @@ static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void);
static int ipmi_init_msghandler(void);
static void smi_recv_tasklet(unsigned long);
static void handle_new_recv_msgs(ipmi_smi_t intf);
+static void need_waiter(ipmi_smi_t intf);
static int initialized;
@@ -73,14 +74,28 @@ static struct proc_dir_entry *proc_ipmi_root;
*/
#define MAX_MSG_TIMEOUT 60000
+/* Call every ~1000 ms. */
+#define IPMI_TIMEOUT_TIME 1000
+
+/* How many jiffies does it take to get to the timeout time. */
+#define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000)
+
+/*
+ * Request events from the queue every second (this is the number of
+ * IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the
+ * future, IPMI will add a way to know immediately if an event is in
+ * the queue and this silliness can go away.
+ */
+#define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME))
+
/*
* The main "user" data structure.
*/
struct ipmi_user {
struct list_head link;
- /* Set to "0" when the user is destroyed. */
- int valid;
+ /* Set to false when the user is destroyed. */
+ bool valid;
struct kref refcount;
@@ -92,7 +107,7 @@ struct ipmi_user {
ipmi_smi_t intf;
/* Does this interface receive IPMI events? */
- int gets_events;
+ bool gets_events;
};
struct cmd_rcvr {
@@ -383,6 +398,9 @@ struct ipmi_smi {
unsigned int waiting_events_count; /* How many events in queue? */
char delivering_events;
char event_msg_printed;
+ atomic_t event_waiters;
+ unsigned int ticks_to_req_ev;
+ int last_needs_timer;
/*
* The event receiver for my BMC, only really used at panic
@@ -395,7 +413,7 @@ struct ipmi_smi {
/* For handling of maintenance mode. */
int maintenance_mode;
- int maintenance_mode_enable;
+ bool maintenance_mode_enable;
int auto_maintenance_timeout;
spinlock_t maintenance_mode_lock; /* Used in a timer... */
@@ -451,7 +469,6 @@ static DEFINE_MUTEX(ipmi_interfaces_mutex);
static LIST_HEAD(smi_watchers);
static DEFINE_MUTEX(smi_watchers_mutex);
-
#define ipmi_inc_stat(intf, stat) \
atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat])
#define ipmi_get_stat(intf, stat) \
@@ -772,6 +789,7 @@ static int intf_next_seq(ipmi_smi_t intf,
*seq = i;
*seqid = intf->seq_table[i].seqid;
intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ;
+ need_waiter(intf);
} else {
rv = -EAGAIN;
}
@@ -941,7 +959,7 @@ int ipmi_create_user(unsigned int if_num,
new_user->handler = handler;
new_user->handler_data = handler_data;
new_user->intf = intf;
- new_user->gets_events = 0;
+ new_user->gets_events = false;
if (!try_module_get(intf->handlers->owner)) {
rv = -ENODEV;
@@ -962,10 +980,15 @@ int ipmi_create_user(unsigned int if_num,
*/
mutex_unlock(&ipmi_interfaces_mutex);
- new_user->valid = 1;
+ new_user->valid = true;
spin_lock_irqsave(&intf->seq_lock, flags);
list_add_rcu(&new_user->link, &intf->users);
spin_unlock_irqrestore(&intf->seq_lock, flags);
+ if (handler->ipmi_watchdog_pretimeout) {
+ /* User wants pretimeouts, so make sure to watch for them. */
+ if (atomic_inc_return(&intf->event_waiters) == 1)
+ need_waiter(intf);
+ }
*user = new_user;
return 0;
@@ -1019,7 +1042,13 @@ int ipmi_destroy_user(ipmi_user_t user)
struct cmd_rcvr *rcvr;
struct cmd_rcvr *rcvrs = NULL;
- user->valid = 0;
+ user->valid = false;
+
+ if (user->handler->ipmi_watchdog_pretimeout)
+ atomic_dec(&intf->event_waiters);
+
+ if (user->gets_events)
+ atomic_dec(&intf->event_waiters);
/* Remove the user from the interface's sequence table. */
spin_lock_irqsave(&intf->seq_lock, flags);
@@ -1155,25 +1184,23 @@ int ipmi_set_maintenance_mode(ipmi_user_t user, int mode)
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;
+ intf->maintenance_mode_enable = false;
break;
case IPMI_MAINTENANCE_MODE_ON:
- intf->maintenance_mode = mode;
- intf->maintenance_mode_enable = 1;
+ intf->maintenance_mode_enable = true;
break;
default:
rv = -EINVAL;
goto out_unlock;
}
+ intf->maintenance_mode = mode;
maintenance_mode_update(intf);
}
@@ -1184,7 +1211,7 @@ int ipmi_set_maintenance_mode(ipmi_user_t user, int mode)
}
EXPORT_SYMBOL(ipmi_set_maintenance_mode);
-int ipmi_set_gets_events(ipmi_user_t user, int val)
+int ipmi_set_gets_events(ipmi_user_t user, bool val)
{
unsigned long flags;
ipmi_smi_t intf = user->intf;
@@ -1194,8 +1221,18 @@ int ipmi_set_gets_events(ipmi_user_t user, int val)
INIT_LIST_HEAD(&msgs);
spin_lock_irqsave(&intf->events_lock, flags);
+ if (user->gets_events == val)
+ goto out;
+
user->gets_events = val;
+ if (val) {
+ if (atomic_inc_return(&intf->event_waiters) == 1)
+ need_waiter(intf);
+ } else {
+ atomic_dec(&intf->event_waiters);
+ }
+
if (intf->delivering_events)
/*
* Another thread is delivering events for this, so
@@ -1289,6 +1326,9 @@ int ipmi_register_for_cmd(ipmi_user_t user,
goto out_unlock;
}
+ if (atomic_inc_return(&intf->event_waiters) == 1)
+ need_waiter(intf);
+
list_add_rcu(&rcvr->link, &intf->cmd_rcvrs);
out_unlock:
@@ -1330,6 +1370,7 @@ int ipmi_unregister_for_cmd(ipmi_user_t user,
mutex_unlock(&intf->cmd_rcvrs_mutex);
synchronize_rcu();
while (rcvrs) {
+ atomic_dec(&intf->event_waiters);
rcvr = rcvrs;
rcvrs = rcvr->next;
kfree(rcvr);
@@ -1535,7 +1576,7 @@ static int i_ipmi_request(ipmi_user_t user,
= IPMI_MAINTENANCE_MODE_TIMEOUT;
if (!intf->maintenance_mode
&& !intf->maintenance_mode_enable) {
- intf->maintenance_mode_enable = 1;
+ intf->maintenance_mode_enable = true;
maintenance_mode_update(intf);
}
spin_unlock_irqrestore(&intf->maintenance_mode_lock,
@@ -2876,6 +2917,8 @@ int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
(unsigned long) intf);
atomic_set(&intf->watchdog_pretimeouts_to_deliver, 0);
spin_lock_init(&intf->events_lock);
+ atomic_set(&intf->event_waiters, 0);
+ intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
INIT_LIST_HEAD(&intf->waiting_events);
intf->waiting_events_count = 0;
mutex_init(&intf->cmd_rcvrs_mutex);
@@ -3965,7 +4008,8 @@ smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg,
static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
struct list_head *timeouts, long timeout_period,
- int slot, unsigned long *flags)
+ int slot, unsigned long *flags,
+ unsigned int *waiting_msgs)
{
struct ipmi_recv_msg *msg;
struct ipmi_smi_handlers *handlers;
@@ -3977,8 +4021,10 @@ static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
return;
ent->timeout -= timeout_period;
- if (ent->timeout > 0)
+ if (ent->timeout > 0) {
+ (*waiting_msgs)++;
return;
+ }
if (ent->retries_left == 0) {
/* The message has used all its retries. */
@@ -3995,6 +4041,8 @@ static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
struct ipmi_smi_msg *smi_msg;
/* More retries, send again. */
+ (*waiting_msgs)++;
+
/*
* Start with the max timer, set to normal timer after
* the message is sent.
@@ -4040,117 +4088,118 @@ static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
}
}
-static void ipmi_timeout_handler(long timeout_period)
+static unsigned int ipmi_timeout_handler(ipmi_smi_t intf, long timeout_period)
{
- ipmi_smi_t intf;
struct list_head timeouts;
struct ipmi_recv_msg *msg, *msg2;
unsigned long flags;
int i;
+ unsigned int waiting_msgs = 0;
- rcu_read_lock();
- list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
- tasklet_schedule(&intf->recv_tasklet);
-
- /*
- * Go through the seq table and find any messages that
- * have timed out, putting them in the timeouts
- * list.
- */
- INIT_LIST_HEAD(&timeouts);
- spin_lock_irqsave(&intf->seq_lock, flags);
- for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++)
- check_msg_timeout(intf, &(intf->seq_table[i]),
- &timeouts, timeout_period, i,
- &flags);
- spin_unlock_irqrestore(&intf->seq_lock, flags);
+ /*
+ * Go through the seq table and find any messages that
+ * have timed out, putting them in the timeouts
+ * list.
+ */
+ INIT_LIST_HEAD(&timeouts);
+ spin_lock_irqsave(&intf->seq_lock, flags);
+ for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++)
+ check_msg_timeout(intf, &(intf->seq_table[i]),
+ &timeouts, timeout_period, i,
+ &flags, &waiting_msgs);
+ spin_unlock_irqrestore(&intf->seq_lock, flags);
- list_for_each_entry_safe(msg, msg2, &timeouts, link)
- deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE);
+ 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.
- */
+ /*
+ * 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) {
- 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);
- }
+ intf->auto_maintenance_timeout
+ -= timeout_period;
+ if (!intf->maintenance_mode
+ && (intf->auto_maintenance_timeout <= 0)) {
+ intf->maintenance_mode_enable = false;
+ maintenance_mode_update(intf);
}
- spin_unlock_irqrestore(&intf->maintenance_mode_lock,
- flags);
}
+ spin_unlock_irqrestore(&intf->maintenance_mode_lock,
+ flags);
}
- rcu_read_unlock();
+
+ tasklet_schedule(&intf->recv_tasklet);
+
+ return waiting_msgs;
}
-static void ipmi_request_event(void)
+static void ipmi_request_event(ipmi_smi_t intf)
{
- ipmi_smi_t intf;
struct ipmi_smi_handlers *handlers;
- rcu_read_lock();
- /*
- * Called from the timer, no need to check if handlers is
- * valid.
- */
- list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
- /* No event requests when in maintenance mode. */
- if (intf->maintenance_mode_enable)
- continue;
+ /* No event requests when in maintenance mode. */
+ if (intf->maintenance_mode_enable)
+ return;
- handlers = intf->handlers;
- if (handlers)
- handlers->request_events(intf->send_info);
- }
- rcu_read_unlock();
+ handlers = intf->handlers;
+ if (handlers)
+ handlers->request_events(intf->send_info);
}
static struct timer_list ipmi_timer;
-/* Call every ~1000 ms. */
-#define IPMI_TIMEOUT_TIME 1000
-
-/* How many jiffies does it take to get to the timeout time. */
-#define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000)
-
-/*
- * Request events from the queue every second (this is the number of
- * IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the
- * future, IPMI will add a way to know immediately if an event is in
- * the queue and this silliness can go away.
- */
-#define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME))
-
static atomic_t stop_operation;
-static unsigned int ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
static void ipmi_timeout(unsigned long data)
{
+ ipmi_smi_t intf;
+ int nt = 0;
+
if (atomic_read(&stop_operation))
return;
- ticks_to_req_ev--;
- if (ticks_to_req_ev == 0) {
- ipmi_request_event();
- ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
- }
+ rcu_read_lock();
+ list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
+ int lnt = 0;
+
+ if (atomic_read(&intf->event_waiters)) {
+ intf->ticks_to_req_ev--;
+ if (intf->ticks_to_req_ev == 0) {
+ ipmi_request_event(intf);
+ intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
+ }
+ lnt++;
+ }
- ipmi_timeout_handler(IPMI_TIMEOUT_TIME);
+ lnt += ipmi_timeout_handler(intf, IPMI_TIMEOUT_TIME);
- mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
+ lnt = !!lnt;
+ if (lnt != intf->last_needs_timer &&
+ intf->handlers->set_need_watch)
+ intf->handlers->set_need_watch(intf->send_info, lnt);
+ intf->last_needs_timer = lnt;
+
+ nt += lnt;
+ }
+ rcu_read_unlock();
+
+ if (nt)
+ mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
}
+static void need_waiter(ipmi_smi_t intf)
+{
+ /* Racy, but worst case we start the timer twice. */
+ if (!timer_pending(&ipmi_timer))
+ mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
+}
static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0);
static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0);
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index b7efd3c1a882..1c4bb4f6ce93 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -217,7 +217,7 @@ struct smi_info {
unsigned char msg_flags;
/* Does the BMC have an event buffer? */
- char has_event_buffer;
+ bool has_event_buffer;
/*
* If set to true, this will request events the next time the
@@ -230,7 +230,7 @@ struct smi_info {
* call. Generally used after a panic to make sure stuff goes
* out.
*/
- int run_to_completion;
+ bool run_to_completion;
/* The I/O port of an SI interface. */
int port;
@@ -248,19 +248,25 @@ struct smi_info {
/* The timer for this si. */
struct timer_list si_timer;
+ /* This flag is set, if the timer is running (timer_pending() isn't enough) */
+ bool timer_running;
+
/* The time (in jiffies) the last timeout occurred at. */
unsigned long last_timeout_jiffies;
/* Used to gracefully stop the timer without race conditions. */
atomic_t stop_operation;
+ /* Are we waiting for the events, pretimeouts, received msgs? */
+ atomic_t need_watch;
+
/*
* The driver will disable interrupts when it gets into a
* situation where it cannot handle messages due to lack of
* memory. Once that situation clears up, it will re-enable
* interrupts.
*/
- int interrupt_disabled;
+ bool interrupt_disabled;
/* From the get device id response... */
struct ipmi_device_id device_id;
@@ -273,7 +279,7 @@ struct smi_info {
* True if we allocated the device, false if it came from
* someplace else (like PCI).
*/
- int dev_registered;
+ bool dev_registered;
/* Slave address, could be reported from DMI. */
unsigned char slave_addr;
@@ -297,19 +303,19 @@ struct smi_info {
static int force_kipmid[SI_MAX_PARMS];
static int num_force_kipmid;
#ifdef CONFIG_PCI
-static int pci_registered;
+static bool pci_registered;
#endif
#ifdef CONFIG_ACPI
-static int pnp_registered;
+static bool pnp_registered;
#endif
#ifdef CONFIG_PARISC
-static int parisc_registered;
+static bool parisc_registered;
#endif
static unsigned int kipmid_max_busy_us[SI_MAX_PARMS];
static int num_max_busy_us;
-static int unload_when_empty = 1;
+static bool unload_when_empty = true;
static int add_smi(struct smi_info *smi);
static int try_smi_init(struct smi_info *smi);
@@ -434,6 +440,13 @@ static void start_clear_flags(struct smi_info *smi_info)
smi_info->si_state = SI_CLEARING_FLAGS;
}
+static void smi_mod_timer(struct smi_info *smi_info, unsigned long new_val)
+{
+ smi_info->last_timeout_jiffies = jiffies;
+ mod_timer(&smi_info->si_timer, new_val);
+ smi_info->timer_running = true;
+}
+
/*
* When we have a situtaion where we run out of memory and cannot
* allocate messages, we just leave them in the BMC and run the system
@@ -444,10 +457,9 @@ static inline void disable_si_irq(struct smi_info *smi_info)
{
if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
start_disable_irq(smi_info);
- smi_info->interrupt_disabled = 1;
+ smi_info->interrupt_disabled = true;
if (!atomic_read(&smi_info->stop_operation))
- mod_timer(&smi_info->si_timer,
- jiffies + SI_TIMEOUT_JIFFIES);
+ smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
}
}
@@ -455,7 +467,7 @@ static inline void enable_si_irq(struct smi_info *smi_info)
{
if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
start_enable_irq(smi_info);
- smi_info->interrupt_disabled = 0;
+ smi_info->interrupt_disabled = false;
}
}
@@ -700,7 +712,7 @@ static void handle_transaction_done(struct smi_info *smi_info)
dev_warn(smi_info->dev,
"Maybe ok, but ipmi might run very slowly.\n");
} else
- smi_info->interrupt_disabled = 0;
+ smi_info->interrupt_disabled = false;
smi_info->si_state = SI_NORMAL;
break;
}
@@ -853,6 +865,19 @@ static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
return si_sm_result;
}
+static void check_start_timer_thread(struct smi_info *smi_info)
+{
+ if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) {
+ smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
+
+ if (smi_info->thread)
+ wake_up_process(smi_info->thread);
+
+ start_next_msg(smi_info);
+ smi_event_handler(smi_info, 0);
+ }
+}
+
static void sender(void *send_info,
struct ipmi_smi_msg *msg,
int priority)
@@ -906,27 +931,11 @@ static void sender(void *send_info,
else
list_add_tail(&msg->link, &smi_info->xmit_msgs);
- if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) {
- /*
- * last_timeout_jiffies is updated here to avoid
- * smi_timeout() handler passing very large time_diff
- * value to smi_event_handler() that causes
- * the send command to abort.
- */
- smi_info->last_timeout_jiffies = jiffies;
-
- mod_timer(&smi_info->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
-
- if (smi_info->thread)
- wake_up_process(smi_info->thread);
-
- start_next_msg(smi_info);
- smi_event_handler(smi_info, 0);
- }
+ check_start_timer_thread(smi_info);
spin_unlock_irqrestore(&smi_info->si_lock, flags);
}
-static void set_run_to_completion(void *send_info, int i_run_to_completion)
+static void set_run_to_completion(void *send_info, bool i_run_to_completion)
{
struct smi_info *smi_info = send_info;
enum si_sm_result result;
@@ -1004,6 +1013,17 @@ static int ipmi_thread(void *data)
spin_lock_irqsave(&(smi_info->si_lock), flags);
smi_result = smi_event_handler(smi_info, 0);
+
+ /*
+ * If the driver is doing something, there is a possible
+ * race with the timer. If the timer handler see idle,
+ * and the thread here sees something else, the timer
+ * handler won't restart the timer even though it is
+ * required. So start it here if necessary.
+ */
+ if (smi_result != SI_SM_IDLE && !smi_info->timer_running)
+ smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
+
spin_unlock_irqrestore(&(smi_info->si_lock), flags);
busy_wait = ipmi_thread_busy_wait(smi_result, smi_info,
&busy_until);
@@ -1011,9 +1031,15 @@ static int ipmi_thread(void *data)
; /* do nothing */
else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait)
schedule();
- else if (smi_result == SI_SM_IDLE)
- schedule_timeout_interruptible(100);
- else
+ else if (smi_result == SI_SM_IDLE) {
+ if (atomic_read(&smi_info->need_watch)) {
+ schedule_timeout_interruptible(100);
+ } else {
+ /* Wait to be woken up when we are needed. */
+ __set_current_state(TASK_INTERRUPTIBLE);
+ schedule();
+ }
+ } else
schedule_timeout_interruptible(1);
}
return 0;
@@ -1024,7 +1050,7 @@ static void poll(void *send_info)
{
struct smi_info *smi_info = send_info;
unsigned long flags = 0;
- int run_to_completion = smi_info->run_to_completion;
+ bool run_to_completion = smi_info->run_to_completion;
/*
* Make sure there is some delay in the poll loop so we can
@@ -1049,6 +1075,17 @@ static void request_events(void *send_info)
atomic_set(&smi_info->req_events, 1);
}
+static void set_need_watch(void *send_info, bool enable)
+{
+ struct smi_info *smi_info = send_info;
+ unsigned long flags;
+
+ atomic_set(&smi_info->need_watch, enable);
+ spin_lock_irqsave(&smi_info->si_lock, flags);
+ check_start_timer_thread(smi_info);
+ spin_unlock_irqrestore(&smi_info->si_lock, flags);
+}
+
static int initialized;
static void smi_timeout(unsigned long data)
@@ -1073,10 +1110,6 @@ static void smi_timeout(unsigned long data)
* SI_USEC_PER_JIFFY);
smi_result = smi_event_handler(smi_info, time_diff);
- spin_unlock_irqrestore(&(smi_info->si_lock), flags);
-
- smi_info->last_timeout_jiffies = jiffies_now;
-
if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
/* Running with interrupts, only do long timeouts. */
timeout = jiffies + SI_TIMEOUT_JIFFIES;
@@ -1098,7 +1131,10 @@ static void smi_timeout(unsigned long data)
do_mod_timer:
if (smi_result != SI_SM_IDLE)
- mod_timer(&(smi_info->si_timer), timeout);
+ smi_mod_timer(smi_info, timeout);
+ else
+ smi_info->timer_running = false;
+ spin_unlock_irqrestore(&(smi_info->si_lock), flags);
}
static irqreturn_t si_irq_handler(int irq, void *data)
@@ -1146,8 +1182,7 @@ static int smi_start_processing(void *send_info,
/* Set up the timer that drives the interface. */
setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi);
- new_smi->last_timeout_jiffies = jiffies;
- mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
+ smi_mod_timer(new_smi, jiffies + SI_TIMEOUT_JIFFIES);
/*
* Check if the user forcefully enabled the daemon.
@@ -1188,7 +1223,7 @@ static int get_smi_info(void *send_info, struct ipmi_smi_info *data)
return 0;
}
-static void set_maintenance_mode(void *send_info, int enable)
+static void set_maintenance_mode(void *send_info, bool enable)
{
struct smi_info *smi_info = send_info;
@@ -1202,6 +1237,7 @@ static struct ipmi_smi_handlers handlers = {
.get_smi_info = get_smi_info,
.sender = sender,
.request_events = request_events,
+ .set_need_watch = set_need_watch,
.set_maintenance_mode = set_maintenance_mode,
.set_run_to_completion = set_run_to_completion,
.poll = poll,
@@ -1229,7 +1265,7 @@ static bool si_tryplatform = 1;
#ifdef CONFIG_PCI
static bool si_trypci = 1;
#endif
-static bool si_trydefaults = 1;
+static bool si_trydefaults = IS_ENABLED(CONFIG_IPMI_SI_PROBE_DEFAULTS);
static char *si_type[SI_MAX_PARMS];
#define MAX_SI_TYPE_STR 30
static char si_type_str[MAX_SI_TYPE_STR];
@@ -1328,7 +1364,7 @@ module_param_array(force_kipmid, int, &num_force_kipmid, 0);
MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or"
" disabled(0). Normally the IPMI driver auto-detects"
" this, but the value may be overridden by this parm.");
-module_param(unload_when_empty, int, 0);
+module_param(unload_when_empty, bool, 0);
MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are"
" specified or found, default is 1. Setting to 0"
" is useful for hot add of devices using hotmod.");
@@ -3336,18 +3372,19 @@ static int try_smi_init(struct smi_info *new_smi)
INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs));
new_smi->curr_msg = NULL;
atomic_set(&new_smi->req_events, 0);
- new_smi->run_to_completion = 0;
+ new_smi->run_to_completion = false;
for (i = 0; i < SI_NUM_STATS; i++)
atomic_set(&new_smi->stats[i], 0);
- new_smi->interrupt_disabled = 1;
+ new_smi->interrupt_disabled = true;
atomic_set(&new_smi->stop_operation, 0);
+ atomic_set(&new_smi->need_watch, 0);
new_smi->intf_num = smi_num;
smi_num++;
rv = try_enable_event_buffer(new_smi);
if (rv == 0)
- new_smi->has_event_buffer = 1;
+ new_smi->has_event_buffer = true;
/*
* Start clearing the flags before we enable interrupts or the
@@ -3381,7 +3418,7 @@ static int try_smi_init(struct smi_info *new_smi)
rv);
goto out_err;
}
- new_smi->dev_registered = 1;
+ new_smi->dev_registered = true;
}
rv = ipmi_register_smi(&handlers,
@@ -3430,7 +3467,7 @@ static int try_smi_init(struct smi_info *new_smi)
wait_for_timer_and_thread(new_smi);
out_err:
- new_smi->interrupt_disabled = 1;
+ new_smi->interrupt_disabled = true;
if (new_smi->intf) {
ipmi_unregister_smi(new_smi->intf);
@@ -3466,7 +3503,7 @@ static int try_smi_init(struct smi_info *new_smi)
if (new_smi->dev_registered) {
platform_device_unregister(new_smi->pdev);
- new_smi->dev_registered = 0;
+ new_smi->dev_registered = false;
}
return rv;
@@ -3521,14 +3558,14 @@ static int init_ipmi_si(void)
printk(KERN_ERR PFX "Unable to register "
"PCI driver: %d\n", rv);
else
- pci_registered = 1;
+ pci_registered = true;
}
#endif
#ifdef CONFIG_ACPI
if (si_tryacpi) {
pnp_register_driver(&ipmi_pnp_driver);
- pnp_registered = 1;
+ pnp_registered = true;
}
#endif
@@ -3544,7 +3581,7 @@ static int init_ipmi_si(void)
#ifdef CONFIG_PARISC
register_parisc_driver(&ipmi_parisc_driver);
- parisc_registered = 1;
+ parisc_registered = true;
/* poking PC IO addresses will crash machine, don't do it */
si_trydefaults = 0;
#endif
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-15 22:45:52 +0300