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Subject[PATCH 04/12 v2] staging: mei: adding watchdog ops
Date
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>
---
drivers/staging/mei/main.c | 2 +-
drivers/staging/mei/mei_dev.h | 5 ++
drivers/staging/mei/wd.c | 95 ++++++++++++++++++++++++++++++++++------
3 files changed, 86 insertions(+), 16 deletions(-)
diff --git a/drivers/staging/mei/main.c b/drivers/staging/mei/main.c
index 37f07da..60003cd 100644
--- a/drivers/staging/mei/main.c
+++ b/drivers/staging/mei/main.c
@@ -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;

diff --git a/drivers/staging/mei/mei_dev.h b/drivers/staging/mei/mei_dev.h
index d434afc..43d7e1c 100644
--- a/drivers/staging/mei/mei_dev.h
+++ b/drivers/staging/mei/mei_dev.h
@@ -38,6 +38,11 @@
#define MEI_WD_STATE_INDEPENDENCE_MSG_SENT (1 << 0)

/*
+ * MEI PCI Device object
+ */
+extern struct pci_dev *mei_device;
+
+/*
* AMT Watchdog Device
*/
#define INTEL_AMT_WATCHDOG_ID "INTCAMT"
diff --git a/drivers/staging/mei/wd.c b/drivers/staging/mei/wd.c
index d9e41a7..fb2bd3d 100644
--- a/drivers/staging/mei/wd.c
+++ b/drivers/staging/mei/wd.c
@@ -27,21 +27,6 @@
#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
*/
static u16 watchdog_timeout = AMT_WD_DEFAULT_TIMEOUT;
@@ -210,3 +195,83 @@ out:
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,
+};
+
+
--
1.7.4.1


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