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staging: mei: adding watchdog ping

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adding watchdog ping to send ping/heartbeat to the the AMT watchdog client.
in addition removing the heartbeat sending from the driver timers 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 09:03:11 +03:00 committed by Greg Kroah-Hartman
parent 4a3cafd5d9
commit 8c4a59a789
2 changed files with 54 additions and 27 deletions
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27
drivers/staging/mei/interrupt.c
View File

@ -1430,33 +1430,6 @@ void mei_wd_timer(struct work_struct *work)
} }
} }
if (dev->wd_cl.state != MEI_FILE_CONNECTED)
goto out;
/* Watchdog */
if (dev->wd_due_counter && !dev->wd_bypass) {
if (--dev->wd_due_counter == 0) {
if (dev->mei_host_buffer_is_empty &&
mei_flow_ctrl_creds(dev, &dev->wd_cl) > 0) {
dev->mei_host_buffer_is_empty = false;
dev_dbg(&dev->pdev->dev, "send watchdog.\n");
if (mei_wd_send(dev))
dev_dbg(&dev->pdev->dev, "wd send failed.\n");
else
if (mei_flow_ctrl_reduce(dev, &dev->wd_cl))
goto out;
if (dev->wd_timeout)
dev->wd_due_counter = 2;
else
dev->wd_due_counter = 0;
} else
dev->wd_pending = true;
}
}
if (dev->iamthif_stall_timer) { if (dev->iamthif_stall_timer) {
if (--dev->iamthif_stall_timer == 0) { if (--dev->iamthif_stall_timer == 0) {
dev_dbg(&dev->pdev->dev, "reseting because of hang to amthi.\n"); dev_dbg(&dev->pdev->dev, "reseting because of hang to amthi.\n");

54
drivers/staging/mei/wd.c
View File

@ -254,6 +254,58 @@ static int mei_wd_ops_stop(struct watchdog_device *wd_dev)
return 0; return 0;
} }
/*
* mei_wd_ops_ping - wd ping command from the watchdog core.
*
* @wd_dev - watchdog device struct
*
* returns 0 if success, negative errno code for failure
*/
static int mei_wd_ops_ping(struct watchdog_device *wd_dev)
{
int ret = 0;
struct mei_device *dev;
dev = pci_get_drvdata(mei_device);
if (!dev)
return -ENODEV;
mutex_lock(&dev->device_lock);
if (dev->wd_cl.state != MEI_FILE_CONNECTED) {
dev_dbg(&dev->pdev->dev, "wd is not connected.\n");
ret = -ENODEV;
goto end;
}
/* Check if we can send the ping to HW*/
if (dev->mei_host_buffer_is_empty &&
mei_flow_ctrl_creds(dev, &dev->wd_cl) > 0) {
dev->mei_host_buffer_is_empty = false;
dev_dbg(&dev->pdev->dev, "sending watchdog ping\n");
if (mei_wd_send(dev)) {
dev_dbg(&dev->pdev->dev, "wd send failed.\n");
ret = -EIO;
goto end;
}
if (mei_flow_ctrl_reduce(dev, &dev->wd_cl)) {
dev_dbg(&dev->pdev->dev, "mei_flow_ctrl_reduce() failed.\n");
ret = -EIO;
goto end;
}
} else {
dev->wd_pending = true;
}
end:
mutex_unlock(&dev->device_lock);
return ret;
}
/* /*
* Watchdog Device structs * Watchdog Device structs
*/ */
@ -261,9 +313,11 @@ const struct watchdog_ops wd_ops = {
.owner = THIS_MODULE, .owner = THIS_MODULE,
.start = mei_wd_ops_start, .start = mei_wd_ops_start,
.stop = mei_wd_ops_stop, .stop = mei_wd_ops_stop,
.ping = mei_wd_ops_ping,
}; };
const struct watchdog_info wd_info = { const struct watchdog_info wd_info = {
.identity = INTEL_AMT_WATCHDOG_ID, .identity = INTEL_AMT_WATCHDOG_ID,
.options = WDIOF_KEEPALIVEPING,
}; };
struct watchdog_device amt_wd_dev = { struct watchdog_device amt_wd_dev = {