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ipmi: Add a maintenance mode for IPMB messages 

If you send a command to another BMC that might take some extra
time, increase the timeouts temporarily.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
This commit is contained in:
Corey Minyard 2018-04-05 12:59:17 -05:00
parent ce7fa1c38d
commit 252e30c1e7
1 changed files with 28 additions and 0 deletions
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28
drivers/char/ipmi/ipmi_msghandler.c
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@ -143,6 +143,12 @@ module_param(default_retry_ms, ulong, 0644);
MODULE_PARM_DESC(default_retry_ms,
"The time (milliseconds) between retry sends");
/* The default timeout for maintenance mode message retries. */
static unsigned long default_maintenance_retry_ms = 3000;
module_param(default_maintenance_retry_ms, ulong, 0644);
MODULE_PARM_DESC(default_maintenance_retry_ms,
"The time (milliseconds) between retry sends in maintenance mode");
/* The default maximum number of retries */
static unsigned int default_max_retries = 4;
module_param(default_max_retries, uint, 0644);
@ -524,6 +530,13 @@ struct ipmi_smi {
int auto_maintenance_timeout;
spinlock_t maintenance_mode_lock; /* Used in a timer... */
/*
* If we are doing maintenance on something on IPMB, extend
* the timeout time to avoid timeouts writing firmware and
* such.
*/
int ipmb_maintenance_mode_timeout;
/*
* A cheap hack, if this is non-null and a message to an
* interface comes in with a NULL user, call this routine with
@ -1861,6 +1874,15 @@ static int i_ipmi_request(ipmi_user_t user,
spin_lock_irqsave(&(intf->seq_lock), flags);
if (is_maintenance_mode_cmd(msg))
intf->ipmb_maintenance_mode_timeout =
maintenance_mode_timeout_ms;
if (intf->ipmb_maintenance_mode_timeout &&
retry_time_ms == 0)
/* Different default in maintenance mode */
retry_time_ms = default_maintenance_retry_ms;
/*
* Create a sequence number with a 1 second
* timeout and 4 retries.
@ -4710,6 +4732,12 @@ static unsigned int ipmi_timeout_handler(ipmi_smi_t intf,
*/
INIT_LIST_HEAD(&timeouts);
spin_lock_irqsave(&intf->seq_lock, flags);
if (intf->ipmb_maintenance_mode_timeout) {
if (intf->ipmb_maintenance_mode_timeout <= timeout_period)
intf->ipmb_maintenance_mode_timeout = 0;
else
intf->ipmb_maintenance_mode_timeout -= timeout_period;
}
for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++)
check_msg_timeout(intf, &(intf->seq_table[i]),
&timeouts, timeout_period, i,