netdev - [patch iproute2 4/6] bridge/link: add new offload hwmode swdev

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Message-Id: <1417683438-10935-5-git-send-email-jiri@resnulli.us>
Date:	Thu,  4 Dec 2014 09:57:16 +0100
From:	Jiri Pirko <jiri@...nulli.us>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net, nhorman@...driver.com, andy@...yhouse.net,
	tgraf@...g.ch, dborkman@...hat.com, ogerlitz@...lanox.com,
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	ben@...adent.org.uk, stephen@...workplumber.org,
	jeffrey.t.kirsher@...el.com, vyasevic@...hat.com,
	xiyou.wangcong@...il.com, john.r.fastabend@...el.com,
	edumazet@...gle.com, jhs@...atatu.com, sfeldma@...il.com,
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Subject: [patch iproute2 4/6] bridge/link: add new offload hwmode swdev

From: Scott Feldman <sfeldma@...il.com>

To support full-featured switch devices offloading bridge funtionality,
add new hwmode 'swdev'.  Like 'vepa' and 'veb', 'swdev' indicated bridge
port functionality is being offloaded to hardware.

Signed-off-by: Scott Feldman <sfeldma@...il.com>
Signed-off-by: Jiri Pirko <jiri@...nulli.us>
---
 bridge/link.c             |  6 ++++--
 include/linux/if_bridge.h |  1 +
 man/man8/bridge.8         | 13 ++++++++-----
 3 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/bridge/link.c b/bridge/link.c
index 90d9e7f..efe0b8c 100644
--- a/bridge/link.c
+++ b/bridge/link.c
@@ -65,7 +65,7 @@ static const char *oper_states[] = {
 	"TESTING", "DORMANT",	 "UP"
 };
 
-static const char *hw_mode[] = {"VEB", "VEPA"};
+static const char *hw_mode[] = {"VEB", "VEPA", "swdev"};
 
 static void print_operstate(FILE *f, __u8 state)
 {
@@ -315,10 +315,12 @@ static int brlink_modify(int argc, char **argv)
 				mode = BRIDGE_MODE_VEPA;
 			else if (strcmp(*argv, "veb") == 0)
 				mode = BRIDGE_MODE_VEB;
+			else if (strcmp(*argv, "swdev") == 0)
+				mode = BRIDGE_MODE_SWDEV;
 			else {
 				fprintf(stderr,
 					"Mode argument must be \"vepa\" or "
-					"\"veb\".\n");
+					"\"veb\" or \"swdev\".\n");
 				exit(-1);
 			}
 		} else {
diff --git a/include/linux/if_bridge.h b/include/linux/if_bridge.h
index ed6868e..6b4eb66 100644
--- a/include/linux/if_bridge.h
+++ b/include/linux/if_bridge.h
@@ -105,6 +105,7 @@ struct __fdb_entry {
 
 #define BRIDGE_MODE_VEB		0	/* Default loopback mode */
 #define BRIDGE_MODE_VEPA	1	/* 802.1Qbg defined VEPA mode */
+#define BRIDGE_MODE_SWDEV	2	/* Full switch device offload */
 
 /* Bridge management nested attributes
  * [IFLA_AF_SPEC] = {
diff --git a/man/man8/bridge.8 b/man/man8/bridge.8
index af31d41..d3d64d1 100644
--- a/man/man8/bridge.8
+++ b/man/man8/bridge.8
@@ -38,7 +38,7 @@ bridge \- show / manipulate bridge addresses and devices
 .BR root_block " { " on " | " off " } ] [ "
 .BR learning " { " on " | " off " } ] [ "
 .BR flood " { " on " | " off " } ] [ "
-.BR hwmode " { " vepa " | " veb " } ] "
+.BR hwmode " { " vepa " | " veb " | " swdev " } ] "
 
 .ti -8
 .BR "bridge link" " [ " show " ] [ "
@@ -247,15 +247,18 @@ Controls whether a given port will flood unicast traffic for which there is no F
 
 .TP
 .BI hwmode
-Some network interface cards support HW bridge functionality and they may be
+Some port devices support HW bridge functionality and they may be
 configured in different modes.  Currently support modes are:
 
 .B vepa
-- Data sent between HW ports is sent on the wire to the external
-switch.
+- NIC interface supports VEPA: data sent between HW ports is sent on
+the wire to the external switch.
 
 .B veb
-- bridging happens in hardware.
+- NIC interface supports VEB: bridging happens in hardware.
+
+.B swdev
+- Full Ethernet switch offload device: bridging happens in hardware.
 
 .SS bridge link show - list bridge port configuration.
 
-- 
1.9.3

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