habanalabs/gaudi: collect undefined opcode error info

when an undefined opcode error occurres, the driver collects
the relevant information from the Qman and stores it inside
the hdev data structure. An event fd indication is sent towards the
user space.

Note: another commit shall be followed which will add support to
read the error info by an ioctl.

Signed-off-by: Tal Cohen <talcohen@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>

1 files changed, 7 insertions, 6 deletions

diff --git a/drivers/misc/habanalabs/common/device.c b/drivers/misc/habanalabs/common/device.c
index 38e1ad432e51..0f804ecb6caa 100644
--- a/drivers/misc/habanalabs/common/device.c
+++ b/drivers/misc/habanalabs/common/device.c
@@ -1531,10 +1531,11 @@ out_err:
 	return rc;
 }
 
-static void hl_notifier_event_send(struct hl_notifier_event *notifier_event, u64 event)
+static void hl_notifier_event_send(struct hl_notifier_event *notifier_event, u64 event_mask)
 {
 	mutex_lock(&notifier_event->lock);
-	notifier_event->events_mask |= event;
+	notifier_event->events_mask |= event_mask;
+
 	if (notifier_event->eventfd)
 		eventfd_signal(notifier_event->eventfd, 1);
 
@@ -1545,17 +1546,17 @@ static void hl_notifier_event_send(struct hl_notifier_event *notifier_event, u64
  * hl_notifier_event_send_all - notify all user processes via eventfd
  *
  * @hdev: pointer to habanalabs device structure
- * @event: the occurred event
+ * @event_mask: the occurred event/s
  * Returns 0 for success or an error on failure.
  */
-void hl_notifier_event_send_all(struct hl_device *hdev, u64 event)
+void hl_notifier_event_send_all(struct hl_device *hdev, u64 event_mask)
 {
 	struct hl_fpriv	*hpriv;
 
 	mutex_lock(&hdev->fpriv_list_lock);
 
 	list_for_each_entry(hpriv, &hdev->fpriv_list, dev_node)
-		hl_notifier_event_send(&hpriv->notifier_event, event);
+		hl_notifier_event_send(&hpriv->notifier_event, event_mask);
 
 	mutex_unlock(&hdev->fpriv_list_lock);
 
@@ -1563,7 +1564,7 @@ void hl_notifier_event_send_all(struct hl_device *hdev, u64 event)
 	mutex_lock(&hdev->fpriv_ctrl_list_lock);
 
 	list_for_each_entry(hpriv, &hdev->fpriv_ctrl_list, dev_node)
-		hl_notifier_event_send(&hpriv->notifier_event, event);
+		hl_notifier_event_send(&hpriv->notifier_event, event_mask);
 
 	mutex_unlock(&hdev->fpriv_ctrl_list_lock);
 }