From 92a3a9b1a3997cf67aca7874e7f61b102ea2f27c Mon Sep 17 00:00:00 2001 From: Dani Liberman Date: Thu, 20 Apr 2023 19:33:34 +0300 Subject: accel/habanalabs: add description to several info ioctls Several info ioctls may return success although no data retrieved. Signed-off-by: Dani Liberman Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay --- include/uapi/drm/habanalabs_accel.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'include') diff --git a/include/uapi/drm/habanalabs_accel.h b/include/uapi/drm/habanalabs_accel.h index d9ef1b151d04..e6436f3e8ea6 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 -- cgit v1.2.3