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staging: mei: adding watchdog ops

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adding start and stop function.
start - check if AMT wd client is connected, which is been connected on driver
load.
stop - send stop command to AMT wd.

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 09:03:10 +03:00 committed by Greg Kroah-Hartman
parent 9ce178e539
commit 4a3cafd5d9
3 changed files with 86 additions and 16 deletions
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2
drivers/staging/mei/main.c
View file

@ -58,7 +58,7 @@ static struct cdev mei_cdev;
static int mei_major;
/* The device pointer */
/* Currently this driver works as long as there is only a single AMT device. */
static struct pci_dev *mei_device;
struct pci_dev *mei_device;
static struct class *mei_class;

5
drivers/staging/mei/mei_dev.h
View file

@ -37,6 +37,11 @@
#define MEI_WD_PARAMS_SIZE 4
#define MEI_WD_STATE_INDEPENDENCE_MSG_SENT (1 << 0)
/*
* MEI PCI Device object
*/
extern struct pci_dev *mei_device;
/*
* AMT Watchdog Device
*/

95
drivers/staging/mei/wd.c
View file

@ -26,21 +26,6 @@
#include "interface.h"
#include "mei.h"
/*
* Watchdog Device structs
*/
const struct watchdog_info wd_info = {
.identity = INTEL_AMT_WATCHDOG_ID,
};
struct watchdog_device amt_wd_dev = {
.info = &wd_info,
.timeout = AMT_WD_DEFAULT_TIMEOUT,
.min_timeout = AMT_WD_MIN_TIMEOUT,
.max_timeout = AMT_WD_MAX_TIMEOUT,
};
/*
* MEI Watchdog Module Parameters
*/
@ -210,3 +195,83 @@ int mei_wd_stop(struct mei_device *dev, bool preserve)
return ret;
}
/*
* mei_wd_ops_start - wd start command from the watchdog core.
*
* @wd_dev - watchdog device struct
*
* returns 0 if success, negative errno code for failure
*/
static int mei_wd_ops_start(struct watchdog_device *wd_dev)
{
int err = -ENODEV;
struct mei_device *dev;
dev = pci_get_drvdata(mei_device);
if (!dev)
return -ENODEV;
mutex_lock(&dev->device_lock);
if (dev->mei_state != MEI_ENABLED) {
dev_dbg(&dev->pdev->dev, "mei_state != MEI_ENABLED mei_state= %d\n",
dev->mei_state);
goto end_unlock;
}
if (dev->wd_cl.state != MEI_FILE_CONNECTED) {
dev_dbg(&dev->pdev->dev, "MEI Driver is not connected to Watchdog Client\n");
goto end_unlock;
}
mei_wd_start_setup(dev);
err = 0;
end_unlock:
mutex_unlock(&dev->device_lock);
return err;
}
/*
* mei_wd_ops_stop - wd stop command from the watchdog core.
*
* @wd_dev - watchdog device struct
*
* returns 0 if success, negative errno code for failure
*/
static int mei_wd_ops_stop(struct watchdog_device *wd_dev)
{
struct mei_device *dev;
dev = pci_get_drvdata(mei_device);
if (!dev)
return -ENODEV;
mutex_lock(&dev->device_lock);
mei_wd_stop(dev, false);
mutex_unlock(&dev->device_lock);
return 0;
}
/*
* Watchdog Device structs
*/
const struct watchdog_ops wd_ops = {
.owner = THIS_MODULE,
.start = mei_wd_ops_start,
.stop = mei_wd_ops_stop,
};
const struct watchdog_info wd_info = {
.identity = INTEL_AMT_WATCHDOG_ID,
};
struct watchdog_device amt_wd_dev = {
.info = &wd_info,
.ops = &wd_ops,
.timeout = AMT_WD_DEFAULT_TIMEOUT,
.min_timeout = AMT_WD_MIN_TIMEOUT,
.max_timeout = AMT_WD_MAX_TIMEOUT,
};