Kernel watchdog timeout
Implement kernel watchdog that detects when firmware becomes
unresponsive.
Change-Id: I5c5b58a56a2ce629e1fd7cabae83b61823239ea6
diff --git a/kernel/ethosu_device.c b/kernel/ethosu_device.c
index dfdaa58..f440331 100644
--- a/kernel/ethosu_device.c
+++ b/kernel/ethosu_device.c
@@ -252,6 +252,18 @@
return ret;
}
+static void ethosu_watchdog_callback(struct ethosu_watchdog *wdog)
+{
+ struct ethosu_device *edev =
+ container_of(wdog, struct ethosu_device, watchdog);
+
+ mutex_lock(&edev->mutex);
+
+ dev_warn(edev->dev, "Device watchdog timeout");
+
+ mutex_unlock(&edev->mutex);
+}
+
static int ethosu_open(struct inode *inode,
struct file *file)
{
@@ -442,11 +454,16 @@
dma_set_mask_and_coherent(edev->dev, DMA_BIT_MASK(DMA_ADDR_BITS));
- ret = ethosu_mailbox_init(&edev->mailbox, dev, in_queue, out_queue,
- ethosu_mbox_rx, edev);
+ ret = ethosu_watchdog_init(&edev->watchdog, dev,
+ ethosu_watchdog_callback);
if (ret)
goto release_reserved_mem;
+ ret = ethosu_mailbox_init(&edev->mailbox, dev, in_queue, out_queue,
+ ethosu_mbox_rx, edev, &edev->watchdog);
+ if (ret)
+ goto deinit_watchdog;
+
cdev_init(&edev->cdev, &fops);
edev->cdev.owner = THIS_MODULE;
@@ -476,6 +493,9 @@
deinit_mailbox:
ethosu_mailbox_deinit(&edev->mailbox);
+deinit_watchdog:
+ ethosu_watchdog_deinit(&edev->watchdog);
+
release_reserved_mem:
of_reserved_mem_device_release(edev->dev);
@@ -485,6 +505,7 @@
void ethosu_dev_deinit(struct ethosu_device *edev)
{
ethosu_mailbox_deinit(&edev->mailbox);
+ ethosu_watchdog_deinit(&edev->watchdog);
device_destroy(edev->class, edev->cdev.dev);
cdev_del(&edev->cdev);
of_reserved_mem_device_release(edev->dev);