uapi/habanalabs: add some comments in habanalabs.h

This patch adds two comments in uapi/habanalabs.h:
- From which queue id the internal queues begin
- Invalid values that can be returned in the seq field from the CS IOCTL

Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>

diff --git a/include/uapi/misc/habanalabs.h b/include/uapi/misc/habanalabs.h
index 7fd6f633534c2a7e5cddb4681448e37b8a7e6058..ab1957e31077288ed075f293017eb41e47f356e8 100644 (file)
--- a/include/uapi/misc/habanalabs.h
+++ b/include/uapi/misc/habanalabs.h
@@ -33,7 +33,7 @@ enum goya_queue_id {
        GOYA_QUEUE_ID_DMA_3,
        GOYA_QUEUE_ID_DMA_4,
        GOYA_QUEUE_ID_CPU_PQ,
-       GOYA_QUEUE_ID_MME,
+       GOYA_QUEUE_ID_MME,      /* Internal queues start here */
        GOYA_QUEUE_ID_TPC0,
        GOYA_QUEUE_ID_TPC1,
        GOYA_QUEUE_ID_TPC2,
@@ -181,7 +181,10 @@ struct hl_cs_in {
 };
 
 struct hl_cs_out {
-       /* this holds the sequence number of the CS to pass to wait ioctl */
+       /*
+        * seq holds the sequence number of the CS to pass to wait ioctl. All
+        * values are valid except for 0 and ULLONG_MAX
+        */
        __u64 seq;
        /* HL_CS_STATUS_* */
        __u32 status;