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Commit 252e30c1 authored by Corey Minyard's avatar Corey Minyard
Browse files

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: default avatarCorey Minyard <cminyard@mvista.com>
parent ce7fa1c3

drivers/char/ipmi/ipmi_msghandler.c

+28 −0
Original line number Diff line number Diff line
@@ -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,