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staging: mei: adding set_timeout watchdog function 

add the ability to let the watchdog core set
the AMT watchdog timeout value.

the default value will be only set in the start function.

Signed-off-by: Oren Weil <oren.jer.weil@intel.com>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Oren Weil 2011-09-07 09:03:12 +03:00 committed by Greg Kroah-Hartman
parent 8c4a59a789
commit 55d3385672
3 changed files with 36 additions and 7 deletions
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2
drivers/staging/mei/interface.h
View File

@ -51,7 +51,7 @@ int mei_flow_ctrl_creds(struct mei_device *dev, struct mei_cl *cl);
int mei_wd_send(struct mei_device *dev);
int mei_wd_stop(struct mei_device *dev, bool preserve);
bool mei_wd_host_init(struct mei_device *dev);
void mei_wd_start_setup(struct mei_device *dev);
void mei_wd_set_start_timeout(struct mei_device *dev, u16 timeout);
int mei_flow_ctrl_reduce(struct mei_device *dev, struct mei_cl *cl);

1
drivers/staging/mei/main.c
View File

@ -1153,7 +1153,6 @@ static int mei_pci_resume(struct device *device)
/* Start watchdog if stopped in suspend */
if (dev->wd_timeout) {
mei_wd_start_setup(dev);
dev->wd_due_counter = 1;
schedule_delayed_work(&dev->wd_work, HZ);
}

40
drivers/staging/mei/wd.c
View File

@ -51,12 +51,12 @@ const uuid_le mei_wd_guid = UUID_LE(0x05B79A6F, 0x4628, 0x4D7F, 0x89,
0x32, 0xAB);
void mei_wd_start_setup(struct mei_device *dev)
void mei_wd_set_start_timeout(struct mei_device *dev, u16 timeout)
{
dev_dbg(&dev->pdev->dev, "dev->wd_timeout=%d.\n", dev->wd_timeout);
dev_dbg(&dev->pdev->dev, "timeout=%d.\n", timeout);
memcpy(dev->wd_data, mei_start_wd_params, MEI_WD_PARAMS_SIZE);
memcpy(dev->wd_data + MEI_WD_PARAMS_SIZE,
&dev->wd_timeout, sizeof(u16));
&timeout, sizeof(u16));
}
/**
@ -75,7 +75,6 @@ bool mei_wd_host_init(struct mei_device *dev)
dev->wd_timeout = watchdog_timeout;
if (dev->wd_timeout > 0) {
mei_wd_start_setup(dev);
/* find ME WD client */
mei_find_me_client_update_filext(dev, &dev->wd_cl,
&mei_wd_guid, MEI_WD_HOST_CLIENT_ID);
@ -224,7 +223,7 @@ static int mei_wd_ops_start(struct watchdog_device *wd_dev)
goto end_unlock;
}
mei_wd_start_setup(dev);
mei_wd_set_start_timeout(dev, dev->wd_timeout);
err = 0;
end_unlock:
@ -306,6 +305,36 @@ end:
return ret;
}
/*
* mei_wd_ops_set_timeout - wd set timeout command from the watchdog core.
*
* @wd_dev - watchdog device struct
* @timeout - timeout value to set
*
* returns 0 if success, negative errno code for failure
*/
static int mei_wd_ops_set_timeout(struct watchdog_device *wd_dev, unsigned int timeout)
{
struct mei_device *dev;
dev = pci_get_drvdata(mei_device);
if (!dev)
return -ENODEV;
/* Check Timeout value */
if (timeout < AMT_WD_MIN_TIMEOUT || timeout > AMT_WD_MAX_TIMEOUT)
return -EINVAL;
mutex_lock(&dev->device_lock);
dev->wd_timeout = timeout;
mei_wd_set_start_timeout(dev, dev->wd_timeout);
mutex_unlock(&dev->device_lock);
return 0;
}
/*
* Watchdog Device structs
*/
@ -314,6 +343,7 @@ const struct watchdog_ops wd_ops = {
.start = mei_wd_ops_start,
.stop = mei_wd_ops_stop,
.ping = mei_wd_ops_ping,
.set_timeout = mei_wd_ops_set_timeout,
};
const struct watchdog_info wd_info = {
.identity = INTEL_AMT_WATCHDOG_ID,