linux-kernel - [PATCH net-next v3 2/5] bridge: mrp: Add 'enum br_mrp_hw

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Date:   Tue, 9 Feb 2021 21:21:09 +0100
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     <jiri@...nulli.us>, <ivecera@...hat.com>, <davem@...emloft.net>,
        <kuba@...nel.org>, <roopa@...dia.com>, <nikolay@...dia.com>,
        <rasmus.villemoes@...vas.dk>, <andrew@...n.ch>,
        <vladimir.oltean@....com>, <claudiu.manoil@....com>,
        <alexandre.belloni@...tlin.com>, <UNGLinuxDriver@...rochip.com>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <bridge@...ts.linux-foundation.org>
CC:     Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [PATCH net-next v3 2/5] bridge: mrp: Add 'enum br_mrp_hw_support'

Add the enum br_mrp_hw_support that is used by the br_mrp_switchdev
functions to allow the SW to detect the cases where HW can't implement
the functionality or when SW is used as a backup.

Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
---
 net/bridge/br_private_mrp.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/net/bridge/br_private_mrp.h b/net/bridge/br_private_mrp.h
index 32a48e5418da..a94017f86cda 100644
--- a/net/bridge/br_private_mrp.h
+++ b/net/bridge/br_private_mrp.h
@@ -46,6 +46,20 @@ struct br_mrp {
 	struct rcu_head			rcu;
 };
 
+/* This type is returned by br_mrp_switchdev functions that allow to have a SW
+ * backup in case the HW can't implement completely the protocol.
+ * BR_MRP_NONE - means the HW can't run at all the protocol, so the SW stops
+ *               configuring the node anymore.
+ * BR_MRP_SW - the HW can help the SW to run the protocol, by redirecting MRP
+ *             frames to CPU.
+ * BR_MRP_HW - the HW can implement completely the protocol.
+ */
+enum br_mrp_hw_support {
+	BR_MRP_NONE,
+	BR_MRP_SW,
+	BR_MRP_HW,
+};
+
 /* br_mrp.c */
 int br_mrp_add(struct net_bridge *br, struct br_mrp_instance *instance);
 int br_mrp_del(struct net_bridge *br, struct br_mrp_instance *instance);
-- 
2.27.0