From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Wed, 26 Sep 2018 15:35:31 -0700
Subject: nfp: warn on experimental TLV types
Patch-mainline: v4.20-rc1
Git-commit: 97ea8ac360c233e6454bfe6510e7b827a57008af
References: bsc#1109837

Reserve two TLV types for feature development, and warn in the driver
if they ever leak into production.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.c |    7 +++++++
 drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h |    8 ++++++++
 2 files changed, 15 insertions(+)

--- a/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.c
@@ -113,6 +113,13 @@ int nfp_net_tlv_caps_parse(struct device
 				caps->mbox_len = length;
 			}
 			break;
+		case NFP_NET_CFG_TLV_TYPE_EXPERIMENTAL0:
+		case NFP_NET_CFG_TLV_TYPE_EXPERIMENTAL1:
+			dev_warn(dev,
+				 "experimental TLV type:%u offset:%u len:%u\n",
+				 FIELD_GET(NFP_NET_CFG_TLV_HEADER_TYPE, hdr),
+				 offset, length);
+			break;
 		default:
 			if (!FIELD_GET(NFP_NET_CFG_TLV_HEADER_REQUIRED, hdr))
 				break;
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h
@@ -489,12 +489,20 @@
  * %NFP_NET_CFG_TLV_TYPE_MBOX:
  * Variable, mailbox area.  Overwrites the default location which is
  * %NFP_NET_CFG_MBOX_BASE and length %NFP_NET_CFG_MBOX_VAL_MAX_SZ.
+ *
+ * %NFP_NET_CFG_TLV_TYPE_EXPERIMENTAL0:
+ * %NFP_NET_CFG_TLV_TYPE_EXPERIMENTAL1:
+ * Variable, experimental IDs.  IDs designated for internal development and
+ * experiments before a stable TLV ID has been allocated to a feature.  Should
+ * never be present in production firmware.
  */
 #define NFP_NET_CFG_TLV_TYPE_UNKNOWN		0
 #define NFP_NET_CFG_TLV_TYPE_RESERVED		1
 #define NFP_NET_CFG_TLV_TYPE_END		2
 #define NFP_NET_CFG_TLV_TYPE_ME_FREQ		3
 #define NFP_NET_CFG_TLV_TYPE_MBOX		4
+#define NFP_NET_CFG_TLV_TYPE_EXPERIMENTAL0	5
+#define NFP_NET_CFG_TLV_TYPE_EXPERIMENTAL1	6
 
 struct device;