From: Dani Liberman <dliberman@xxxxxxxxx>
Several info ioctls may return success although no data retrieved.
Signed-off-by: Dani Liberman <dliberman@xxxxxxxxx>
Reviewed-by: Oded Gabbay <ogabbay@xxxxxxxxxx>
Signed-off-by: Oded Gabbay <ogabbay@xxxxxxxxxx>
---
include/uapi/drm/habanalabs_accel.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/include/uapi/drm/habanalabs_accel.h b/include/uapi/drm/habanalabs_accel.h
index d45454b9a62e..03464ed86c68 100644
--- a/include/uapi/drm/habanalabs_accel.h
+++ b/include/uapi/drm/habanalabs_accel.h
@@ -787,18 +787,28 @@ enum hl_server_type {
* The address which accessing it caused the razwi.
* Razwi initiator.
* Razwi cause, was it a page fault or MMU access error.
+ * May return 0 even though no new data is available, in that case
+ * timestamp will be 0.
* HL_INFO_DEV_MEM_ALLOC_PAGE_SIZES - Retrieve valid page sizes for device memory allocation
* HL_INFO_SECURED_ATTESTATION - Retrieve attestation report of the boot.
* HL_INFO_REGISTER_EVENTFD - Register eventfd for event notifications.
* HL_INFO_UNREGISTER_EVENTFD - Unregister eventfd
* HL_INFO_GET_EVENTS - Retrieve the last occurred events
* HL_INFO_UNDEFINED_OPCODE_EVENT - Retrieve last undefined opcode error information.
+ * May return 0 even though no new data is available, in that case
+ * timestamp will be 0.
* HL_INFO_ENGINE_STATUS - Retrieve the status of all the h/w engines in the asic.
* HL_INFO_PAGE_FAULT_EVENT - Retrieve parameters of captured page fault.
+ * May return 0 even though no new data is available, in that case
+ * timestamp will be 0.
* HL_INFO_USER_MAPPINGS - Retrieve user mappings, captured after page fault event.
* HL_INFO_FW_GENERIC_REQ - Send generic request to FW.
* HL_INFO_HW_ERR_EVENT - Retrieve information on the reported HW error.
+ * May return 0 even though no new data is available, in that case
+ * timestamp will be 0.
* HL_INFO_FW_ERR_EVENT - Retrieve information on the reported FW error.
+ * May return 0 even though no new data is available, in that case
+ * timestamp will be 0.
*/
#define HL_INFO_HW_IP_INFO 0
#define HL_INFO_HW_EVENTS 1
--
2.40.1
