linux-kernel - [PATCH] habanalabs: add comments on INFO IOCTL

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Date:   Tue, 16 Jul 2019 12:02:18 +0300
From:   Oded Gabbay <oded.gabbay@...il.com>
To:     linux-kernel@...r.kernel.org, oshpigelman@...ana.ai,
        ttayar@...ana.ai
Cc:     gregkh@...uxfoundation.org
Subject: [PATCH] habanalabs: add comments on INFO IOCTL

This patch adds some in-code documentation on the different opcodes of the
INFO IOCTL.

Signed-off-by: Oded Gabbay <oded.gabbay@...il.com>
---
 include/uapi/misc/habanalabs.h | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/include/uapi/misc/habanalabs.h b/include/uapi/misc/habanalabs.h
index 3956c226ca35..a5a1d0e7ec82 100644
--- a/include/uapi/misc/habanalabs.h
+++ b/include/uapi/misc/habanalabs.h
@@ -75,7 +75,19 @@ enum hl_device_status {
 	HL_DEVICE_STATUS_MALFUNCTION
 };
 
-/* Opcode for management ioctl */
+/* Opcode for management ioctl
+ *
+ * HW_IP_INFO         - Receive information about different IP blocks in the
+ *                      device.
+ * HL_INFO_HW_EVENTS  - Receive an array describing how many times each event
+ *                      occurred since the last hard reset.
+ * HL_INFO_DRAM_USAGE - Retrieve the dram usage inside the device and of the
+ *                      specific context. This is relevant only for GOYA device.
+ * HL_INFO_HW_IDLE    - Retrieve information about the idle status of each
+ *                      internal engine.
+ * HL_INFO_DEVICE_STATUS - Retrieve the device's status. This opcode doesn't
+ *                         require an open context.
+ */
 #define HL_INFO_HW_IP_INFO	0
 #define HL_INFO_HW_EVENTS	1
 #define HL_INFO_DRAM_USAGE	2
-- 
2.17.1