linux-kernel - [RFC net-next v4 5/9] switchdev: mrp: Extend switchdev API to offload MRP

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Message-ID: <20200327092126.15407-6-horatiu.vultur@microchip.com>
Date:   Fri, 27 Mar 2020 10:21:22 +0100
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     <davem@...emloft.net>, <jiri@...nulli.us>, <ivecera@...hat.com>,
        <kuba@...nel.org>, <roopa@...ulusnetworks.com>,
        <nikolay@...ulusnetworks.com>, <olteanv@...il.com>,
        <andrew@...n.ch>, <UNGLinuxDriver@...rochip.com>,
        <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <bridge@...ts.linux-foundation.org>
CC:     Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [RFC net-next v4 5/9] switchdev: mrp: Extend switchdev API to offload MRP

Extend switchdev API to add support for MRP. The HW is notified in
following cases:

SWITCHDEV_OBJ_ID_MRP: This is used when a MRP instance is added/removed
  from the MRP ring.

SWITCHDEV_OBJ_ID_RING_ROLE_MRP: This is used when the role of the node
  changes. The current supported roles are MRM and MRC.

SWITCHDEV_OBJ_ID_RING_TEST_MRP: This is used when to start/stop sending
  MRP_Test frames on the mrp ring ports. This is called only on nodes that have
  the role MRM. In case this fails then the SW will generate the frames.

SWITCHDEV_ATTR_ID_MRP_PORT_STATE: This is used when the port's state is
  changed. It can be in blocking/forwarding mode.

SWITCHDEV_ATTR_ID_MRP_PORT_ROLE: This is used when port's role changes. The
  roles of the port can be primary/secondary. This is required to notify HW
  because the MRP_Test frame contains the field MRP_PortRole that contains this
  information.

SWITCHDEV_ATTR_ID_MRP_RING_STATE: This is used when the ring changes it states
  to open or closed. This is required to notify HW because the MRP_Test frame
  contains the field MRP_InState which contains this information.

Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
---
 include/net/switchdev.h | 53 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/include/net/switchdev.h b/include/net/switchdev.h
index aee86a189432..3323779122c7 100644
--- a/include/net/switchdev.h
+++ b/include/net/switchdev.h
@@ -40,6 +40,11 @@ enum switchdev_attr_id {
 	SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
 	SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
 	SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
+#if IS_ENABLED(CONFIG_BRIDGE_MRP)
+	SWITCHDEV_ATTR_ID_MRP_PORT_STATE,
+	SWITCHDEV_ATTR_ID_MRP_PORT_ROLE,
+	SWITCHDEV_ATTR_ID_MRP_RING_STATE,
+#endif
 };
 
 struct switchdev_attr {
@@ -55,6 +60,11 @@ struct switchdev_attr {
 		clock_t ageing_time;			/* BRIDGE_AGEING_TIME */
 		bool vlan_filtering;			/* BRIDGE_VLAN_FILTERING */
 		bool mc_disabled;			/* MC_DISABLED */
+#if IS_ENABLED(CONFIG_BRIDGE_MRP)
+		u8 mrp_port_state;			/* MRP_PORT_STATE */
+		u8 mrp_port_role;			/* MRP_PORT_ROLE */
+		u8 mrp_ring_state;			/* MRP_RING_STATE */
+#endif
 	} u;
 };
 
@@ -63,6 +73,11 @@ enum switchdev_obj_id {
 	SWITCHDEV_OBJ_ID_PORT_VLAN,
 	SWITCHDEV_OBJ_ID_PORT_MDB,
 	SWITCHDEV_OBJ_ID_HOST_MDB,
+#if IS_ENABLED(CONFIG_BRIDGE_MRP)
+	SWITCHDEV_OBJ_ID_MRP,
+	SWITCHDEV_OBJ_ID_RING_TEST_MRP,
+	SWITCHDEV_OBJ_ID_RING_ROLE_MRP,
+#endif
 };
 
 struct switchdev_obj {
@@ -94,6 +109,44 @@ struct switchdev_obj_port_mdb {
 #define SWITCHDEV_OBJ_PORT_MDB(OBJ) \
 	container_of((OBJ), struct switchdev_obj_port_mdb, obj)
 
+
+#if IS_ENABLED(CONFIG_BRIDGE_MRP)
+/* SWITCHDEV_OBJ_ID_MRP */
+struct switchdev_obj_mrp {
+	struct switchdev_obj obj;
+	struct net_device *p_port;
+	struct net_device *s_port;
+	u32 ring_id;
+};
+
+#define SWITCHDEV_OBJ_MRP(OBJ) \
+	container_of((OBJ), struct switchdev_obj_mrp, obj)
+
+/* SWITCHDEV_OBJ_ID_RING_TEST_MRP */
+struct switchdev_obj_ring_test_mrp {
+	struct switchdev_obj obj;
+	/* The value is in us and a value of 0 represents to stop */
+	u32 interval;
+	u8 max_miss;
+	u32 ring_id;
+	u32 period;
+};
+
+#define SWITCHDEV_OBJ_RING_TEST_MRP(OBJ) \
+	container_of((OBJ), struct switchdev_obj_ring_test_mrp, obj)
+
+/* SWICHDEV_OBJ_ID_RING_ROLE_MRP */
+struct switchdev_obj_ring_role_mrp {
+	struct switchdev_obj obj;
+	u8 ring_role;
+	u32 ring_id;
+};
+
+#define SWITCHDEV_OBJ_RING_ROLE_MRP(OBJ) \
+	container_of((OBJ), struct switchdev_obj_ring_role_mrp, obj)
+
+#endif
+
 typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj);
 
 enum switchdev_notifier_type {
-- 
2.17.1