Merge branch 'bridge-mrp-Extend-br_mrp_switchdev_'

Horatiu Vulturv says:

====================
bridge: mrp: Extend br_mrp_switchdev_*

This patch series extends MRP switchdev to allow the SW to have a better
understanding if the HW can implement the MRP functionality or it needs
to help the HW to run it. There are 3 cases:
- when HW can't implement at all the functionality.
- when HW can implement a part of the functionality but needs the SW
  implement the rest. For example if it can't detect when it stops
  receiving MRP Test frames but it can copy the MRP frames to CPU to
  allow the SW to determine this.  Another example is generating the MRP
  Test frames. If HW can't do that then the SW is used as backup.
- when HW can implement completely the functionality.

So, initially the SW tries to offload the entire functionality in HW, if
that fails it tries offload parts of the functionality in HW and use the
SW as helper and if also this fails then MRP can't run on this HW.

Based on these new calls, implement the switchdev for Ocelot driver. This
is an example where the HW can't run completely the functionality but it
can help the SW to run it, by trapping all MRP frames to CPU.

Also this patch series adds MRP support to DSA and implements the Felix
driver which just reuse the Ocelot functions. This part was just compiled
tested because I don't have any HW on which to do the actual tests.

v4:
 - remove ifdef MRP from include/net/switchdev.h
 - move MRP implementation for Ocelot in a different file such that
   Felix driver can use it.
 - extend DSA with MRP support
 - implement MRP support for Felix.
v3:
 - implement the switchdev calls needed by Ocelot driver.
v2:
 - fix typos in comments and in commit messages
 - remove some of the comments
 - move repeated code in helper function
 - fix issue when deleting a node when sw_backup was true
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/ocelot/felix.c

@@ -1582,6 +1582,40 @@ static int felix_sb_occ_tc_port_bind_get(struct dsa_switch *ds, int port,
 					      pool_type, p_cur, p_max);
 }
 
+static int felix_mrp_add(struct dsa_switch *ds, int port,
+			 const struct switchdev_obj_mrp *mrp)
+{
+	struct ocelot *ocelot = ds->priv;
+
+	return ocelot_mrp_add(ocelot, port, mrp);
+}
+
+static int felix_mrp_del(struct dsa_switch *ds, int port,
+			 const struct switchdev_obj_mrp *mrp)
+{
+	struct ocelot *ocelot = ds->priv;
+
+	return ocelot_mrp_add(ocelot, port, mrp);
+}
+
+static int
+felix_mrp_add_ring_role(struct dsa_switch *ds, int port,
+			const struct switchdev_obj_ring_role_mrp *mrp)
+{
+	struct ocelot *ocelot = ds->priv;
+
+	return ocelot_mrp_add_ring_role(ocelot, port, mrp);
+}
+
+static int
+felix_mrp_del_ring_role(struct dsa_switch *ds, int port,
+			const struct switchdev_obj_ring_role_mrp *mrp)
+{
+	struct ocelot *ocelot = ds->priv;
+
+	return ocelot_mrp_del_ring_role(ocelot, port, mrp);
+}
+
 const struct dsa_switch_ops felix_switch_ops = {
 	.get_tag_protocol		= felix_get_tag_protocol,
 	.change_tag_protocol		= felix_change_tag_protocol,
@@ -1636,6 +1670,10 @@ const struct dsa_switch_ops felix_switch_ops = {
 	.devlink_sb_occ_max_clear	= felix_sb_occ_max_clear,
 	.devlink_sb_occ_port_pool_get	= felix_sb_occ_port_pool_get,
 	.devlink_sb_occ_tc_port_bind_get= felix_sb_occ_tc_port_bind_get,
+	.port_mrp_add			= felix_mrp_add,
+	.port_mrp_del			= felix_mrp_del,
+	.port_mrp_add_ring_role		= felix_mrp_add_ring_role,
+	.port_mrp_del_ring_role		= felix_mrp_del_ring_role,
 };
 
 struct net_device *felix_port_to_netdev(struct ocelot *ocelot, int port)

drivers/net/ethernet/mscc/Makefile

@@ -8,6 +8,7 @@ mscc_ocelot_switch_lib-y := \
 	ocelot_flower.o \
 	ocelot_ptp.o \
 	ocelot_devlink.o
+mscc_ocelot_switch_lib-$(CONFIG_BRIDGE_MRP) += ocelot_mrp.o
 obj-$(CONFIG_MSCC_OCELOT_SWITCH) += mscc_ocelot.o
 mscc_ocelot-y := \
 	ocelot_vsc7514.o \

drivers/net/ethernet/mscc/ocelot.c

@@ -687,7 +687,7 @@ static int ocelot_xtr_poll_xfh(struct ocelot *ocelot, int grp, u32 *xfh)
 int ocelot_xtr_poll_frame(struct ocelot *ocelot, int grp, struct sk_buff **nskb)
 {
 	struct skb_shared_hwtstamps *shhwtstamps;
-	u64 tod_in_ns, full_ts_in_ns;
+	u64 tod_in_ns, full_ts_in_ns, cpuq;
 	u64 timestamp, src_port, len;
 	u32 xfh[OCELOT_TAG_LEN / 4];
 	struct net_device *dev;
@@ -704,6 +704,7 @@ int ocelot_xtr_poll_frame(struct ocelot *ocelot, int grp, struct sk_buff **nskb)
 	ocelot_xfh_get_src_port(xfh, &src_port);
 	ocelot_xfh_get_len(xfh, &len);
 	ocelot_xfh_get_rew_val(xfh, &timestamp);
+	ocelot_xfh_get_cpuq(xfh, &cpuq);
 
 	if (WARN_ON(src_port >= ocelot->num_phys_ports))
 		return -EINVAL;
@@ -770,6 +771,13 @@ int ocelot_xtr_poll_frame(struct ocelot *ocelot, int grp, struct sk_buff **nskb)
 		skb->offload_fwd_mark = 1;
 
 	skb->protocol = eth_type_trans(skb, dev);
+
+#if IS_ENABLED(CONFIG_BRIDGE_MRP)
+	if (skb->protocol == cpu_to_be16(ETH_P_MRP) &&
+	    cpuq & BIT(OCELOT_MRP_CPUQ))
+		skb->offload_fwd_mark = 0;
+#endif
+
 	*nskb = skb;
 
 	return 0;

drivers/net/ethernet/mscc/ocelot_mrp.c

+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/* Microsemi Ocelot Switch driver
+ *
+ * This contains glue logic between the switchdev driver operations and the
+ * mscc_ocelot_switch_lib.
+ *
+ * Copyright (c) 2017, 2019 Microsemi Corporation
+ * Copyright 2020-2021 NXP Semiconductors
+ */
+
+#include <linux/if_bridge.h>
+#include <linux/mrp_bridge.h>
+#include <soc/mscc/ocelot_vcap.h>
+#include <uapi/linux/mrp_bridge.h>
+#include "ocelot.h"
+#include "ocelot_vcap.h"
+
+static int ocelot_mrp_del_vcap(struct ocelot *ocelot, int port)
+{
+	struct ocelot_vcap_block *block_vcap_is2;
+	struct ocelot_vcap_filter *filter;
+
+	block_vcap_is2 = &ocelot->block[VCAP_IS2];
+	filter = ocelot_vcap_block_find_filter_by_id(block_vcap_is2, port,
+						     false);
+	if (!filter)
+		return 0;
+
+	return ocelot_vcap_filter_del(ocelot, filter);
+}
+
+int ocelot_mrp_add(struct ocelot *ocelot, int port,
+		   const struct switchdev_obj_mrp *mrp)
+{
+	struct ocelot_port *ocelot_port = ocelot->ports[port];
+	struct ocelot_port_private *priv;
+	struct net_device *dev;
+
+	if (!ocelot_port)
+		return -EOPNOTSUPP;
+
+	priv = container_of(ocelot_port, struct ocelot_port_private, port);
+	dev = priv->dev;
+
+	if (mrp->p_port != dev && mrp->s_port != dev)
+		return 0;
+
+	if (ocelot->mrp_ring_id != 0 &&
+	    ocelot->mrp_s_port &&
+	    ocelot->mrp_p_port)
+		return -EINVAL;
+
+	if (mrp->p_port == dev)
+		ocelot->mrp_p_port = dev;
+
+	if (mrp->s_port == dev)
+		ocelot->mrp_s_port = dev;
+
+	ocelot->mrp_ring_id = mrp->ring_id;
+
+	return 0;
+}
+EXPORT_SYMBOL(ocelot_mrp_add);
+
+int ocelot_mrp_del(struct ocelot *ocelot, int port,
+		   const struct switchdev_obj_mrp *mrp)
+{
+	struct ocelot_port *ocelot_port = ocelot->ports[port];
+	struct ocelot_port_private *priv;
+	struct net_device *dev;
+
+	if (!ocelot_port)
+		return -EOPNOTSUPP;
+
+	priv = container_of(ocelot_port, struct ocelot_port_private, port);
+	dev = priv->dev;
+
+	if (ocelot->mrp_p_port != dev && ocelot->mrp_s_port != dev)
+		return 0;
+
+	if (ocelot->mrp_ring_id == 0 &&
+	    !ocelot->mrp_s_port &&
+	    !ocelot->mrp_p_port)
+		return -EINVAL;
+
+	if (ocelot_mrp_del_vcap(ocelot, priv->chip_port))
+		return -EINVAL;
+
+	if (ocelot->mrp_p_port == dev)
+		ocelot->mrp_p_port = NULL;
+
+	if (ocelot->mrp_s_port == dev)
+		ocelot->mrp_s_port = NULL;
+
+	ocelot->mrp_ring_id = 0;
+
+	return 0;
+}
+EXPORT_SYMBOL(ocelot_mrp_del);
+
+int ocelot_mrp_add_ring_role(struct ocelot *ocelot, int port,
+			     const struct switchdev_obj_ring_role_mrp *mrp)
+{
+	struct ocelot_port *ocelot_port = ocelot->ports[port];
+	struct ocelot_vcap_filter *filter;
+	struct ocelot_port_private *priv;
+	struct net_device *dev;
+	int err;
+
+	if (!ocelot_port)
+		return -EOPNOTSUPP;
+
+	priv = container_of(ocelot_port, struct ocelot_port_private, port);
+	dev = priv->dev;
+
+	if (ocelot->mrp_ring_id != mrp->ring_id)
+		return -EINVAL;
+
+	if (!mrp->sw_backup)
+		return -EOPNOTSUPP;
+
+	if (ocelot->mrp_p_port != dev && ocelot->mrp_s_port != dev)
+		return 0;
+
+	filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
+	if (!filter)
+		return -ENOMEM;
+
+	filter->key_type = OCELOT_VCAP_KEY_ETYPE;
+	filter->prio = 1;
+	filter->id.cookie = priv->chip_port;
+	filter->id.tc_offload = false;
+	filter->block_id = VCAP_IS2;
+	filter->type = OCELOT_VCAP_FILTER_OFFLOAD;
+	filter->ingress_port_mask = BIT(priv->chip_port);
+	*(__be16 *)filter->key.etype.etype.value = htons(ETH_P_MRP);
+	*(__be16 *)filter->key.etype.etype.mask = htons(0xffff);
+	filter->action.mask_mode = OCELOT_MASK_MODE_PERMIT_DENY;
+	filter->action.port_mask = 0x0;
+	filter->action.cpu_copy_ena = true;
+	filter->action.cpu_qu_num = OCELOT_MRP_CPUQ;
+
+	err = ocelot_vcap_filter_add(ocelot, filter, NULL);
+	if (err)
+		kfree(filter);
+
+	return err;
+}
+EXPORT_SYMBOL(ocelot_mrp_add_ring_role);
+
+int ocelot_mrp_del_ring_role(struct ocelot *ocelot, int port,
+			     const struct switchdev_obj_ring_role_mrp *mrp)
+{
+	struct ocelot_port *ocelot_port = ocelot->ports[port];
+	struct ocelot_port_private *priv;
+	struct net_device *dev;
+
+	if (!ocelot_port)
+		return -EOPNOTSUPP;
+
+	priv = container_of(ocelot_port, struct ocelot_port_private, port);
+	dev = priv->dev;
+
+	if (ocelot->mrp_ring_id != mrp->ring_id)
+		return -EINVAL;
+
+	if (!mrp->sw_backup)
+		return -EOPNOTSUPP;
+
+	if (ocelot->mrp_p_port != dev && ocelot->mrp_s_port != dev)
+		return 0;
+
+	return ocelot_mrp_del_vcap(ocelot, priv->chip_port);
+}
+EXPORT_SYMBOL(ocelot_mrp_del_ring_role);

drivers/net/ethernet/mscc/ocelot_net.c

@@ -1010,6 +1010,52 @@ static int ocelot_port_obj_del_mdb(struct net_device *dev,
 	return ocelot_port_mdb_del(ocelot, port, mdb);
 }
 
+static int ocelot_port_obj_mrp_add(struct net_device *dev,
+				   const struct switchdev_obj_mrp *mrp)
+{
+	struct ocelot_port_private *priv = netdev_priv(dev);
+	struct ocelot_port *ocelot_port = &priv->port;
+	struct ocelot *ocelot = ocelot_port->ocelot;
+	int port = priv->chip_port;
+
+	return ocelot_mrp_add(ocelot, port, mrp);
+}
+
+static int ocelot_port_obj_mrp_del(struct net_device *dev,
+				   const struct switchdev_obj_mrp *mrp)
+{
+	struct ocelot_port_private *priv = netdev_priv(dev);
+	struct ocelot_port *ocelot_port = &priv->port;
+	struct ocelot *ocelot = ocelot_port->ocelot;
+	int port = priv->chip_port;
+
+	return ocelot_mrp_del(ocelot, port, mrp);
+}
+
+static int
+ocelot_port_obj_mrp_add_ring_role(struct net_device *dev,
+				  const struct switchdev_obj_ring_role_mrp *mrp)
+{
+	struct ocelot_port_private *priv = netdev_priv(dev);
+	struct ocelot_port *ocelot_port = &priv->port;
+	struct ocelot *ocelot = ocelot_port->ocelot;
+	int port = priv->chip_port;
+
+	return ocelot_mrp_add_ring_role(ocelot, port, mrp);
+}
+
+static int
+ocelot_port_obj_mrp_del_ring_role(struct net_device *dev,
+				  const struct switchdev_obj_ring_role_mrp *mrp)
+{
+	struct ocelot_port_private *priv = netdev_priv(dev);
+	struct ocelot_port *ocelot_port = &priv->port;
+	struct ocelot *ocelot = ocelot_port->ocelot;
+	int port = priv->chip_port;
+
+	return ocelot_mrp_del_ring_role(ocelot, port, mrp);
+}
+
 static int ocelot_port_obj_add(struct net_device *dev,
 			       const struct switchdev_obj *obj,
 			       struct netlink_ext_ack *extack)
@@ -1024,6 +1070,13 @@ static int ocelot_port_obj_add(struct net_device *dev,
 	case SWITCHDEV_OBJ_ID_PORT_MDB:
 		ret = ocelot_port_obj_add_mdb(dev, SWITCHDEV_OBJ_PORT_MDB(obj));
 		break;
+	case SWITCHDEV_OBJ_ID_MRP:
+		ret = ocelot_port_obj_mrp_add(dev, SWITCHDEV_OBJ_MRP(obj));
+		break;
+	case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
+		ret = ocelot_port_obj_mrp_add_ring_role(dev,
+							SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
+		break;
 	default:
 		return -EOPNOTSUPP;
 	}
@@ -1044,6 +1097,13 @@ static int ocelot_port_obj_del(struct net_device *dev,
 	case SWITCHDEV_OBJ_ID_PORT_MDB:
 		ret = ocelot_port_obj_del_mdb(dev, SWITCHDEV_OBJ_PORT_MDB(obj));
 		break;
+	case SWITCHDEV_OBJ_ID_MRP:
+		ret = ocelot_port_obj_mrp_del(dev, SWITCHDEV_OBJ_MRP(obj));
+		break;
+	case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
+		ret = ocelot_port_obj_mrp_del_ring_role(dev,
+							SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
+		break;
 	default:
 		return -EOPNOTSUPP;
 	}

include/linux/dsa/ocelot.h

@@ -160,6 +160,11 @@ static inline void ocelot_xfh_get_src_port(void *extraction, u64 *src_port)
 	packing(extraction, src_port, 46, 43, OCELOT_TAG_LEN, UNPACK, 0);
 }
 
+static inline void ocelot_xfh_get_cpuq(void *extraction, u64 *cpuq)
+{
+	packing(extraction, cpuq, 28, 20, OCELOT_TAG_LEN, UNPACK, 0);
+}
+
 static inline void ocelot_xfh_get_qos_class(void *extraction, u64 *qos_class)
 {
 	packing(extraction, qos_class, 19, 17, OCELOT_TAG_LEN, UNPACK, 0);

include/net/dsa.h

@@ -792,6 +792,18 @@ struct dsa_switch_ops {
 				 struct net_device *hsr);
 	int	(*port_hsr_leave)(struct dsa_switch *ds, int port,
 				  struct net_device *hsr);
+
+	/*
+	 * MRP integration
+	 */
+	int	(*port_mrp_add)(struct dsa_switch *ds, int port,
+				const struct switchdev_obj_mrp *mrp);
+	int	(*port_mrp_del)(struct dsa_switch *ds, int port,
+				const struct switchdev_obj_mrp *mrp);
+	int	(*port_mrp_add_ring_role)(struct dsa_switch *ds, int port,
+					  const struct switchdev_obj_ring_role_mrp *mrp);
+	int	(*port_mrp_del_ring_role)(struct dsa_switch *ds, int port,
+					  const struct switchdev_obj_ring_role_mrp *mrp);
 };
 
 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes)		\

include/net/switchdev.h

@@ -27,9 +27,7 @@ enum switchdev_attr_id {
 	SWITCHDEV_ATTR_ID_BRIDGE_VLAN_PROTOCOL,
 	SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
 	SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
-#if IS_ENABLED(CONFIG_BRIDGE_MRP)
 	SWITCHDEV_ATTR_ID_MRP_PORT_ROLE,
-#endif
 };
 
 struct switchdev_brport_flags {
@@ -51,9 +49,7 @@ struct switchdev_attr {
 		bool vlan_filtering;			/* BRIDGE_VLAN_FILTERING */
 		u16 vlan_protocol;			/* BRIDGE_VLAN_PROTOCOL */
 		bool mc_disabled;			/* MC_DISABLED */
-#if IS_ENABLED(CONFIG_BRIDGE_MRP)
 		u8 mrp_port_role;			/* MRP_PORT_ROLE */
-#endif
 	} u;
 };
 
@@ -62,7 +58,6 @@ 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,
@@ -70,8 +65,6 @@ enum switchdev_obj_id {
 	SWITCHDEV_OBJ_ID_IN_TEST_MRP,
 	SWITCHDEV_OBJ_ID_IN_ROLE_MRP,
 	SWITCHDEV_OBJ_ID_IN_STATE_MRP,
-
-#endif
 };
 
 struct switchdev_obj {
@@ -103,7 +96,6 @@ struct switchdev_obj_port_mdb {
 	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;
@@ -135,6 +127,7 @@ struct switchdev_obj_ring_role_mrp {
 	struct switchdev_obj obj;
 	u8 ring_role;
 	u32 ring_id;
+	u8 sw_backup;
 };
 
 #define SWITCHDEV_OBJ_RING_ROLE_MRP(OBJ) \
@@ -169,6 +162,7 @@ struct switchdev_obj_in_role_mrp {
 	u32 ring_id;
 	u16 in_id;
 	u8 in_role;
+	u8 sw_backup;
 };
 
 #define SWITCHDEV_OBJ_IN_ROLE_MRP(OBJ) \
@@ -183,8 +177,6 @@ struct switchdev_obj_in_state_mrp {
 #define SWITCHDEV_OBJ_IN_STATE_MRP(OBJ) \
 	container_of((OBJ), struct switchdev_obj_in_state_mrp, obj)
 
-#endif
-
 typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj);
 
 enum switchdev_notifier_type {

include/soc/mscc/ocelot.h

@@ -112,6 +112,8 @@
 #define REG_RESERVED_ADDR		0xffffffff
 #define REG_RESERVED(reg)		REG(reg, REG_RESERVED_ADDR)
 
+#define OCELOT_MRP_CPUQ			7
+
 enum ocelot_target {
 	ANA = 1,
 	QS,
@@ -677,6 +679,12 @@ struct ocelot {
 	/* Protects the PTP clock */
 	spinlock_t			ptp_clock_lock;
 	struct ptp_pin_desc		ptp_pins[OCELOT_PTP_PINS_NUM];
+
+#if IS_ENABLED(CONFIG_BRIDGE_MRP)
+	u16				mrp_ring_id;
+	struct net_device		*mrp_p_port;
+	struct net_device		*mrp_s_port;
+#endif
 };
 
 struct ocelot_policer {
@@ -874,4 +882,41 @@ int ocelot_sb_occ_tc_port_bind_get(struct ocelot *ocelot, int port,
 				   enum devlink_sb_pool_type pool_type,
 				   u32 *p_cur, u32 *p_max);
 
+#if IS_ENABLED(CONFIG_BRIDGE_MRP)
+int ocelot_mrp_add(struct ocelot *ocelot, int port,
+		   const struct switchdev_obj_mrp *mrp);
+int ocelot_mrp_del(struct ocelot *ocelot, int port,
+		   const struct switchdev_obj_mrp *mrp);
+int ocelot_mrp_add_ring_role(struct ocelot *ocelot, int port,
+			     const struct switchdev_obj_ring_role_mrp *mrp);
+int ocelot_mrp_del_ring_role(struct ocelot *ocelot, int port,
+			     const struct switchdev_obj_ring_role_mrp *mrp);
+#else
+static inline int ocelot_mrp_add(struct ocelot *ocelot, int port,
+				 const struct switchdev_obj_mrp *mrp)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int ocelot_mrp_del(struct ocelot *ocelot, int port,
+				 const struct switchdev_obj_mrp *mrp)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int
+ocelot_mrp_add_ring_role(struct ocelot *ocelot, int port,
+			 const struct switchdev_obj_ring_role_mrp *mrp)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int
+ocelot_mrp_del_ring_role(struct ocelot *ocelot, int port,
+			 const struct switchdev_obj_ring_role_mrp *mrp)
+{
+	return -EOPNOTSUPP;
+}
+#endif
+
 #endif

net/bridge/br_mrp.c

@@ -639,7 +639,7 @@ int br_mrp_set_ring_role(struct net_bridge *br,
 			 struct br_mrp_ring_role *role)
 {
 	struct br_mrp *mrp = br_mrp_find_id(br, role->ring_id);
-	int err;
+	enum br_mrp_hw_support support;
 
 	if (!mrp)
 		return -EINVAL;
@@ -647,9 +647,9 @@ int br_mrp_set_ring_role(struct net_bridge *br,
 	mrp->ring_role = role->ring_role;
 
 	/* If there is an error just bailed out */
-	err = br_mrp_switchdev_set_ring_role(br, mrp, role->ring_role);
-	if (err && err != -EOPNOTSUPP)
-		return err;
+	support = br_mrp_switchdev_set_ring_role(br, mrp, role->ring_role);
+	if (support == BR_MRP_NONE)
+		return -EOPNOTSUPP;
 
 	/* Now detect if the HW actually applied the role or not. If the HW
 	 * applied the role it means that the SW will not to do those operations
@@ -657,7 +657,7 @@ int br_mrp_set_ring_role(struct net_bridge *br,
 	 * SW when ring is open, but if the is not pushed to the HW the SW will
 	 * need to detect when the ring is open
 	 */
-	mrp->ring_role_offloaded = err == -EOPNOTSUPP ? 0 : 1;
+	mrp->ring_role_offloaded = support == BR_MRP_SW ? 0 : 1;
 
 	return 0;
 }
@@ -670,6 +670,7 @@ int br_mrp_start_test(struct net_bridge *br,
 		      struct br_mrp_start_test *test)
 {
 	struct br_mrp *mrp = br_mrp_find_id(br, test->ring_id);
+	enum br_mrp_hw_support support;
 
 	if (!mrp)
 		return -EINVAL;
@@ -677,9 +678,13 @@ int br_mrp_start_test(struct net_bridge *br,
 	/* Try to push it to the HW and if it fails then continue with SW
 	 * implementation and if that also fails then return error.
 	 */
-	if (!br_mrp_switchdev_send_ring_test(br, mrp, test->interval,
-					     test->max_miss, test->period,
-					     test->monitor))
+	support = br_mrp_switchdev_send_ring_test(br, mrp, test->interval,
+						  test->max_miss, test->period,
+						  test->monitor);
+	if (support == BR_MRP_NONE)
+		return -EOPNOTSUPP;
+
+	if (support == BR_MRP_HW)
 		return 0;
 
 	mrp->test_interval = test->interval;
@@ -721,8 +726,8 @@ int br_mrp_set_in_state(struct net_bridge *br, struct br_mrp_in_state *state)
 int br_mrp_set_in_role(struct net_bridge *br, struct br_mrp_in_role *role)
 {
 	struct br_mrp *mrp = br_mrp_find_id(br, role->ring_id);
+	enum br_mrp_hw_support support;
 	struct net_bridge_port *p;
-	int err;
 
 	if (!mrp)
 		return -EINVAL;
@@ -780,10 +785,10 @@ int br_mrp_set_in_role(struct net_bridge *br, struct br_mrp_in_role *role)
 	mrp->in_id = role->in_id;
 
 	/* If there is an error just bailed out */
-	err = br_mrp_switchdev_set_in_role(br, mrp, role->in_id,
-					   role->ring_id, role->in_role);
-	if (err && err != -EOPNOTSUPP)
-		return err;
+	support = br_mrp_switchdev_set_in_role(br, mrp, role->in_id,
+					       role->ring_id, role->in_role);
+	if (support == BR_MRP_NONE)
+		return -EOPNOTSUPP;
 
 	/* Now detect if the HW actually applied the role or not. If the HW
 	 * applied the role it means that the SW will not to do those operations
@@ -791,7 +796,7 @@ int br_mrp_set_in_role(struct net_bridge *br, struct br_mrp_in_role *role)
 	 * SW when interconnect ring is open, but if the is not pushed to the HW
 	 * the SW will need to detect when the interconnect ring is open.
 	 */
-	mrp->in_role_offloaded = err == -EOPNOTSUPP ? 0 : 1;
+	mrp->in_role_offloaded = support == BR_MRP_SW ? 0 : 1;
 
 	return 0;
 }
@@ -804,6 +809,7 @@ int br_mrp_start_in_test(struct net_bridge *br,
 			 struct br_mrp_start_in_test *in_test)
 {
 	struct br_mrp *mrp = br_mrp_find_in_id(br, in_test->in_id);
+	enum br_mrp_hw_support support;
 
 	if (!mrp)
 		return -EINVAL;
@@ -814,8 +820,13 @@ int br_mrp_start_in_test(struct net_bridge *br,
 	/* Try to push it to the HW and if it fails then continue with SW
 	 * implementation and if that also fails then return error.
 	 */
-	if (!br_mrp_switchdev_send_in_test(br, mrp, in_test->interval,
-					   in_test->max_miss, in_test->period))
+	support =  br_mrp_switchdev_send_in_test(br, mrp, in_test->interval,
+						 in_test->max_miss,
+						 in_test->period);
+	if (support == BR_MRP_NONE)
+		return -EOPNOTSUPP;
+
+	if (support == BR_MRP_HW)
 		return 0;
 
 	mrp->in_test_interval = in_test->interval;

net/bridge/br_mrp_switchdev.c

@@ -4,6 +4,30 @@
 
 #include "br_private_mrp.h"
 
+static enum br_mrp_hw_support
+br_mrp_switchdev_port_obj(struct net_bridge *br,
+			  const struct switchdev_obj *obj, bool add)
+{
+	int err;
+
+	if (add)
+		err = switchdev_port_obj_add(br->dev, obj, NULL);
+	else
+		err = switchdev_port_obj_del(br->dev, obj);
+
+	/* In case of success just return and notify the SW that doesn't need
+	 * to do anything
+	 */
+	if (!err)
+		return BR_MRP_HW;
+
+	if (err != -EOPNOTSUPP)
+		return BR_MRP_NONE;
+
+	/* Continue with SW backup */
+	return BR_MRP_SW;
+}
+
 int br_mrp_switchdev_add(struct net_bridge *br, struct br_mrp *mrp)
 {
 	struct switchdev_obj_mrp mrp_obj = {
@@ -14,14 +38,11 @@ int br_mrp_switchdev_add(struct net_bridge *br, struct br_mrp *mrp)
 		.ring_id = mrp->ring_id,
 		.prio = mrp->prio,
 	};
-	int err;
 
-	err = switchdev_port_obj_add(br->dev, &mrp_obj.obj, NULL);
+	if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
+		return 0;
 
-	if (err && err != -EOPNOTSUPP)
-		return err;
-
-	return 0;
+	return switchdev_port_obj_add(br->dev, &mrp_obj.obj, NULL);
 }
 
 int br_mrp_switchdev_del(struct net_bridge *br, struct br_mrp *mrp)
@@ -33,40 +54,54 @@ int br_mrp_switchdev_del(struct net_bridge *br, struct br_mrp *mrp)
 		.s_port = NULL,
 		.ring_id = mrp->ring_id,
 	};
-	int err;
-
-	err = switchdev_port_obj_del(br->dev, &mrp_obj.obj);
 
-	if (err && err != -EOPNOTSUPP)
-		return err;
+	if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
+		return 0;
 
-	return 0;
+	return switchdev_port_obj_del(br->dev, &mrp_obj.obj);
 }
 
-int br_mrp_switchdev_set_ring_role(struct net_bridge *br,
-				   struct br_mrp *mrp,
-				   enum br_mrp_ring_role_type role)
+enum br_mrp_hw_support
+br_mrp_switchdev_set_ring_role(struct net_bridge *br, struct br_mrp *mrp,
+			       enum br_mrp_ring_role_type role)
 {
 	struct switchdev_obj_ring_role_mrp mrp_role = {
 		.obj.orig_dev = br->dev,
 		.obj.id = SWITCHDEV_OBJ_ID_RING_ROLE_MRP,
 		.ring_role = role,
 		.ring_id = mrp->ring_id,
+		.sw_backup = false,
 	};
+	enum br_mrp_hw_support support;
 	int err;
 
-	if (role == BR_MRP_RING_ROLE_DISABLED)
-		err = switchdev_port_obj_del(br->dev, &mrp_role.obj);
-	else
+	if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
+		return BR_MRP_SW;
+
+	support = br_mrp_switchdev_port_obj(br, &mrp_role.obj,
+					    role != BR_MRP_RING_ROLE_DISABLED);
+	if (support != BR_MRP_SW)
+		return support;
+
+	/* If the driver can't configure to run completely the protocol in HW,
+	 * then try again to configure the HW so the SW can run the protocol.
+	 */
+	mrp_role.sw_backup = true;
+	if (role != BR_MRP_RING_ROLE_DISABLED)
 		err = switchdev_port_obj_add(br->dev, &mrp_role.obj, NULL);
+	else
+		err = switchdev_port_obj_del(br->dev, &mrp_role.obj);
 
-	return err;
+	if (!err)
+		return BR_MRP_SW;
+
+	return BR_MRP_NONE;
 }
 
-int br_mrp_switchdev_send_ring_test(struct net_bridge *br,
-				    struct br_mrp *mrp, u32 interval,
-				    u8 max_miss, u32 period,
-				    bool monitor)
+enum br_mrp_hw_support
+br_mrp_switchdev_send_ring_test(struct net_bridge *br, struct br_mrp *mrp,
+				u32 interval, u8 max_miss, u32 period,
+				bool monitor)
 {
 	struct switchdev_obj_ring_test_mrp test = {
 		.obj.orig_dev = br->dev,
@@ -77,14 +112,11 @@ int br_mrp_switchdev_send_ring_test(struct net_bridge *br,
 		.period = period,
 		.monitor = monitor,
 	};
-	int err;
 
-	if (interval == 0)
-		err = switchdev_port_obj_del(br->dev, &test.obj);
-	else
-		err = switchdev_port_obj_add(br->dev, &test.obj, NULL);
+	if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
+		return BR_MRP_SW;
 
-	return err;
+	return br_mrp_switchdev_port_obj(br, &test.obj, interval != 0);
 }
 
 int br_mrp_switchdev_set_ring_state(struct net_bridge *br,
@@ -97,19 +129,17 @@ int br_mrp_switchdev_set_ring_state(struct net_bridge *br,
 		.ring_state = state,
 		.ring_id = mrp->ring_id,
 	};
-	int err;
-
-	err = switchdev_port_obj_add(br->dev, &mrp_state.obj, NULL);
 
-	if (err && err != -EOPNOTSUPP)
-		return err;
+	if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
+		return 0;
 
-	return 0;
+	return switchdev_port_obj_add(br->dev, &mrp_state.obj, NULL);
 }
 
-int br_mrp_switchdev_set_in_role(struct net_bridge *br, struct br_mrp *mrp,
-				 u16 in_id, u32 ring_id,
-				 enum br_mrp_in_role_type role)
+enum br_mrp_hw_support
+br_mrp_switchdev_set_in_role(struct net_bridge *br, struct br_mrp *mrp,
+			     u16 in_id, u32 ring_id,
+			     enum br_mrp_in_role_type role)
 {
 	struct switchdev_obj_in_role_mrp mrp_role = {
 		.obj.orig_dev = br->dev,
@@ -118,15 +148,32 @@ int br_mrp_switchdev_set_in_role(struct net_bridge *br, struct br_mrp *mrp,
 		.in_id = mrp->in_id,
 		.ring_id = mrp->ring_id,
 		.i_port = rtnl_dereference(mrp->i_port)->dev,
+		.sw_backup = false,
 	};
+	enum br_mrp_hw_support support;
 	int err;
 
-	if (role == BR_MRP_IN_ROLE_DISABLED)
-		err = switchdev_port_obj_del(br->dev, &mrp_role.obj);
-	else
+	if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
+		return BR_MRP_SW;
+
+	support = br_mrp_switchdev_port_obj(br, &mrp_role.obj,
+					    role != BR_MRP_IN_ROLE_DISABLED);
+	if (support != BR_MRP_NONE)
+		return support;
+
+	/* If the driver can't configure to run completely the protocol in HW,
+	 * then try again to configure the HW so the SW can run the protocol.
+	 */
+	mrp_role.sw_backup = true;
+	if (role != BR_MRP_IN_ROLE_DISABLED)
 		err = switchdev_port_obj_add(br->dev, &mrp_role.obj, NULL);
+	else
+		err = switchdev_port_obj_del(br->dev, &mrp_role.obj);
+
+	if (!err)
+		return BR_MRP_SW;
 
-	return err;
+	return BR_MRP_NONE;
 }
 
 int br_mrp_switchdev_set_in_state(struct net_bridge *br, struct br_mrp *mrp,
@@ -138,18 +185,16 @@ int br_mrp_switchdev_set_in_state(struct net_bridge *br, struct br_mrp *mrp,
 		.in_state = state,
 		.in_id = mrp->in_id,
 	};
-	int err;
-
-	err = switchdev_port_obj_add(br->dev, &mrp_state.obj, NULL);
 
-	if (err && err != -EOPNOTSUPP)
-		return err;
+	if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
+		return 0;
 
-	return 0;
+	return switchdev_port_obj_add(br->dev, &mrp_state.obj, NULL);
 }
 
-int br_mrp_switchdev_send_in_test(struct net_bridge *br, struct br_mrp *mrp,
-				  u32 interval, u8 max_miss, u32 period)
+enum br_mrp_hw_support
+br_mrp_switchdev_send_in_test(struct net_bridge *br, struct br_mrp *mrp,
+			      u32 interval, u8 max_miss, u32 period)
 {
 	struct switchdev_obj_in_test_mrp test = {
 		.obj.orig_dev = br->dev,
@@ -159,14 +204,11 @@ int br_mrp_switchdev_send_in_test(struct net_bridge *br, struct br_mrp *mrp,
 		.in_id = mrp->in_id,
 		.period = period,
 	};
-	int err;
 
-	if (interval == 0)
-		err = switchdev_port_obj_del(br->dev, &test.obj);
-	else
-		err = switchdev_port_obj_add(br->dev, &test.obj, NULL);
+	if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
+		return BR_MRP_SW;
 
-	return err;
+	return br_mrp_switchdev_port_obj(br, &test.obj, interval != 0);
 }
 
 int br_mrp_port_switchdev_set_state(struct net_bridge_port *p, u32 state)
@@ -176,14 +218,11 @@ int br_mrp_port_switchdev_set_state(struct net_bridge_port *p, u32 state)
 		.id = SWITCHDEV_ATTR_ID_PORT_STP_STATE,
 		.u.stp_state = state,
 	};
-	int err;
 
-	err = switchdev_port_attr_set(p->dev, &attr, NULL);
-	if (err && err != -EOPNOTSUPP)
-		br_warn(p->br, "error setting offload MRP state on port %u(%s)\n",
-			(unsigned int)p->port_no, p->dev->name);
+	if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
+		return 0;
 
-	return err;
+	return switchdev_port_attr_set(p->dev, &attr, NULL);
 }
 
 int br_mrp_port_switchdev_set_role(struct net_bridge_port *p,
@@ -194,11 +233,9 @@ int br_mrp_port_switchdev_set_role(struct net_bridge_port *p,
 		.id = SWITCHDEV_ATTR_ID_MRP_PORT_ROLE,
 		.u.mrp_port_role = role,
 	};
-	int err;
 
-	err = switchdev_port_attr_set(p->dev, &attr, NULL);
-	if (err && err != -EOPNOTSUPP)
-		return err;
+	if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
+		return 0;
 
-	return 0;
+	return switchdev_port_attr_set(p->dev, &attr, NULL);
 }

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);
@@ -65,23 +79,27 @@ int br_mrp_start_in_test(struct net_bridge *br,
 /* br_mrp_switchdev.c */
 int br_mrp_switchdev_add(struct net_bridge *br, struct br_mrp *mrp);
 int br_mrp_switchdev_del(struct net_bridge *br, struct br_mrp *mrp);
-int br_mrp_switchdev_set_ring_role(struct net_bridge *br, struct br_mrp *mrp,
-				   enum br_mrp_ring_role_type role);
+enum br_mrp_hw_support
+br_mrp_switchdev_set_ring_role(struct net_bridge *br, struct br_mrp *mrp,
+			       enum br_mrp_ring_role_type role);
 int br_mrp_switchdev_set_ring_state(struct net_bridge *br, struct br_mrp *mrp,
 				    enum br_mrp_ring_state_type state);
-int br_mrp_switchdev_send_ring_test(struct net_bridge *br, struct br_mrp *mrp,
-				    u32 interval, u8 max_miss, u32 period,
-				    bool monitor);
+enum br_mrp_hw_support
+br_mrp_switchdev_send_ring_test(struct net_bridge *br, struct br_mrp *mrp,
+				u32 interval, u8 max_miss, u32 period,
+				bool monitor);
 int br_mrp_port_switchdev_set_state(struct net_bridge_port *p, u32 state);
 int br_mrp_port_switchdev_set_role(struct net_bridge_port *p,
 				   enum br_mrp_port_role_type role);
-int br_mrp_switchdev_set_in_role(struct net_bridge *br, struct br_mrp *mrp,
-				 u16 in_id, u32 ring_id,
-				 enum br_mrp_in_role_type role);
+enum br_mrp_hw_support
+br_mrp_switchdev_set_in_role(struct net_bridge *br, struct br_mrp *mrp,
+			     u16 in_id, u32 ring_id,
+			     enum br_mrp_in_role_type role);
 int br_mrp_switchdev_set_in_state(struct net_bridge *br, struct br_mrp *mrp,
 				  enum br_mrp_in_state_type state);
-int br_mrp_switchdev_send_in_test(struct net_bridge *br, struct br_mrp *mrp,
-				  u32 interval, u8 max_miss, u32 period);
+enum br_mrp_hw_support
+br_mrp_switchdev_send_in_test(struct net_bridge *br, struct br_mrp *mrp,
+			      u32 interval, u8 max_miss, u32 period);
 
 /* br_mrp_netlink.c  */
 int br_mrp_ring_port_open(struct net_device *dev, u8 loc);

net/dsa/dsa_priv.h

@@ -31,6 +31,10 @@ enum {
 	DSA_NOTIFIER_VLAN_DEL,
 	DSA_NOTIFIER_MTU,
 	DSA_NOTIFIER_TAG_PROTO,
+	DSA_NOTIFIER_MRP_ADD,
+	DSA_NOTIFIER_MRP_DEL,
+	DSA_NOTIFIER_MRP_ADD_RING_ROLE,
+	DSA_NOTIFIER_MRP_DEL_RING_ROLE,
 };
 
 /* DSA_NOTIFIER_AGEING_TIME */
@@ -91,6 +95,20 @@ struct dsa_notifier_tag_proto_info {
 	const struct dsa_device_ops *tag_ops;
 };
 
+/* DSA_NOTIFIER_MRP_* */
+struct dsa_notifier_mrp_info {
+	const struct switchdev_obj_mrp *mrp;
+	int sw_index;
+	int port;
+};
+
+/* DSA_NOTIFIER_MRP_* */
+struct dsa_notifier_mrp_ring_role_info {
+	const struct switchdev_obj_ring_role_mrp *mrp;
+	int sw_index;
+	int port;
+};
+
 struct dsa_switchdev_event_work {
 	struct dsa_switch *ds;
 	int port;
@@ -198,6 +216,14 @@ int dsa_port_vlan_add(struct dsa_port *dp,
 		      struct netlink_ext_ack *extack);
 int dsa_port_vlan_del(struct dsa_port *dp,
 		      const struct switchdev_obj_port_vlan *vlan);
+int dsa_port_mrp_add(const struct dsa_port *dp,
+		     const struct switchdev_obj_mrp *mrp);
+int dsa_port_mrp_del(const struct dsa_port *dp,
+		     const struct switchdev_obj_mrp *mrp);
+int dsa_port_mrp_add_ring_role(const struct dsa_port *dp,
+			       const struct switchdev_obj_ring_role_mrp *mrp);
+int dsa_port_mrp_del_ring_role(const struct dsa_port *dp,
+			       const struct switchdev_obj_ring_role_mrp *mrp);
 int dsa_port_link_register_of(struct dsa_port *dp);
 void dsa_port_link_unregister_of(struct dsa_port *dp);
 int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr);

net/dsa/port.c

@@ -564,6 +564,54 @@ int dsa_port_vlan_del(struct dsa_port *dp,
 	return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);
 }
 
+int dsa_port_mrp_add(const struct dsa_port *dp,
+		     const struct switchdev_obj_mrp *mrp)
+{
+	struct dsa_notifier_mrp_info info = {
+		.sw_index = dp->ds->index,
+		.port = dp->index,
+		.mrp = mrp,
+	};
+
+	return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD, &info);
+}
+
+int dsa_port_mrp_del(const struct dsa_port *dp,
+		     const struct switchdev_obj_mrp *mrp)
+{
+	struct dsa_notifier_mrp_info info = {
+		.sw_index = dp->ds->index,
+		.port = dp->index,
+		.mrp = mrp,
+	};
+
+	return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL, &info);
+}
+
+int dsa_port_mrp_add_ring_role(const struct dsa_port *dp,
+			       const struct switchdev_obj_ring_role_mrp *mrp)
+{
+	struct dsa_notifier_mrp_ring_role_info info = {
+		.sw_index = dp->ds->index,
+		.port = dp->index,
+		.mrp = mrp,
+	};
+
+	return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD_RING_ROLE, &info);
+}
+
+int dsa_port_mrp_del_ring_role(const struct dsa_port *dp,
+			       const struct switchdev_obj_ring_role_mrp *mrp)
+{
+	struct dsa_notifier_mrp_ring_role_info info = {
+		.sw_index = dp->ds->index,
+		.port = dp->index,
+		.mrp = mrp,
+	};
+
+	return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL_RING_ROLE, &info);
+}
+
 void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp,
 			       const struct dsa_device_ops *tag_ops)
 {

net/dsa/slave.c

@@ -404,6 +404,17 @@ static int dsa_slave_port_obj_add(struct net_device *dev,
 	case SWITCHDEV_OBJ_ID_PORT_VLAN:
 		err = dsa_slave_vlan_add(dev, obj, extack);
 		break;
+	case SWITCHDEV_OBJ_ID_MRP:
+		if (!dsa_port_offloads_netdev(dp, obj->orig_dev))
+			return -EOPNOTSUPP;
+		err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj));
+		break;
+	case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
+		if (!dsa_port_offloads_netdev(dp, obj->orig_dev))
+			return -EOPNOTSUPP;
+		err = dsa_port_mrp_add_ring_role(dp,
+						 SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
+		break;
 	default:
 		err = -EOPNOTSUPP;
 		break;
@@ -461,6 +472,17 @@ static int dsa_slave_port_obj_del(struct net_device *dev,
 	case SWITCHDEV_OBJ_ID_PORT_VLAN:
 		err = dsa_slave_vlan_del(dev, obj);
 		break;
+	case SWITCHDEV_OBJ_ID_MRP:
+		if (!dsa_port_offloads_netdev(dp, obj->orig_dev))
+			return -EOPNOTSUPP;
+		err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj));
+		break;
+	case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
+		if (!dsa_port_offloads_netdev(dp, obj->orig_dev))
+			return -EOPNOTSUPP;
+		err = dsa_port_mrp_del_ring_role(dp,
+						 SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
+		break;
 	default:
 		err = -EOPNOTSUPP;
 		break;

net/dsa/switch.c

@@ -372,6 +372,99 @@ static int dsa_switch_change_tag_proto(struct dsa_switch *ds,
 	return 0;
 }
 
+static bool dsa_switch_mrp_match(struct dsa_switch *ds, int port,
+				 struct dsa_notifier_mrp_info *info)
+{
+	if (ds->index == info->sw_index && port == info->port)
+		return true;
+
+	if (dsa_is_dsa_port(ds, port))
+		return true;
+
+	return false;
+}
+
+static int dsa_switch_mrp_add(struct dsa_switch *ds,
+			      struct dsa_notifier_mrp_info *info)
+{
+	int err = 0;
+	int port;
+
+	if (!ds->ops->port_mrp_add)
+		return -EOPNOTSUPP;
+
+	for (port = 0; port < ds->num_ports; port++) {
+		if (dsa_switch_mrp_match(ds, port, info)) {
+			err = ds->ops->port_mrp_add(ds, port, info->mrp);
+			if (err)
+				break;
+		}
+	}
+
+	return err;
+}
+
+static int dsa_switch_mrp_del(struct dsa_switch *ds,
+			      struct dsa_notifier_mrp_info *info)
+{
+	if (!ds->ops->port_mrp_del)
+		return -EOPNOTSUPP;
+
+	if (ds->index == info->sw_index)
+		return ds->ops->port_mrp_del(ds, info->port, info->mrp);
+
+	return 0;
+}
+
+static bool
+dsa_switch_mrp_ring_role_match(struct dsa_switch *ds, int port,
+			       struct dsa_notifier_mrp_ring_role_info *info)
+{
+	if (ds->index == info->sw_index && port == info->port)
+		return true;
+
+	if (dsa_is_dsa_port(ds, port))
+		return true;
+
+	return false;
+}
+
+static int
+dsa_switch_mrp_add_ring_role(struct dsa_switch *ds,
+			     struct dsa_notifier_mrp_ring_role_info *info)
+{
+	int err = 0;
+	int port;
+
+	if (!ds->ops->port_mrp_add)
+		return -EOPNOTSUPP;
+
+	for (port = 0; port < ds->num_ports; port++) {
+		if (dsa_switch_mrp_ring_role_match(ds, port, info)) {
+			err = ds->ops->port_mrp_add_ring_role(ds, port,
+							      info->mrp);
+			if (err)
+				break;
+		}
+	}
+
+	return err;
+}
+
+static int
+dsa_switch_mrp_del_ring_role(struct dsa_switch *ds,
+			     struct dsa_notifier_mrp_ring_role_info *info)
+{
+	if (!ds->ops->port_mrp_del)
+		return -EOPNOTSUPP;
+
+	if (ds->index == info->sw_index)
+		return ds->ops->port_mrp_del_ring_role(ds, info->port,
+						       info->mrp);
+
+	return 0;
+}
+
 static int dsa_switch_event(struct notifier_block *nb,
 			    unsigned long event, void *info)
 {
@@ -427,6 +520,18 @@ static int dsa_switch_event(struct notifier_block *nb,
 	case DSA_NOTIFIER_TAG_PROTO:
 		err = dsa_switch_change_tag_proto(ds, info);
 		break;
+	case DSA_NOTIFIER_MRP_ADD:
+		err = dsa_switch_mrp_add(ds, info);
+		break;
+	case DSA_NOTIFIER_MRP_DEL:
+		err = dsa_switch_mrp_del(ds, info);
+		break;
+	case DSA_NOTIFIER_MRP_ADD_RING_ROLE:
+		err = dsa_switch_mrp_add_ring_role(ds, info);
+		break;
+	case DSA_NOTIFIER_MRP_DEL_RING_ROLE:
+		err = dsa_switch_mrp_del_ring_role(ds, info);
+		break;
 	default:
 		err = -EOPNOTSUPP;
 		break;

net/dsa/tag_ocelot.c

@@ -83,6 +83,7 @@ static struct sk_buff *ocelot_rcv(struct sk_buff *skb,
 	struct dsa_port *dp;
 	u8 *extraction;
 	u16 vlan_tpid;
+	u64 cpuq;
 
 	/* Revert skb->data by the amount consumed by the DSA master,
 	 * so it points to the beginning of the frame.
@@ -112,6 +113,7 @@ static struct sk_buff *ocelot_rcv(struct sk_buff *skb,
 	ocelot_xfh_get_qos_class(extraction, &qos_class);
 	ocelot_xfh_get_tag_type(extraction, &tag_type);
 	ocelot_xfh_get_vlan_tci(extraction, &vlan_tci);
+	ocelot_xfh_get_cpuq(extraction, &cpuq);
 
 	skb->dev = dsa_master_find_slave(netdev, 0, src_port);
 	if (!skb->dev)
@@ -126,6 +128,12 @@ static struct sk_buff *ocelot_rcv(struct sk_buff *skb,
 	skb->offload_fwd_mark = 1;
 	skb->priority = qos_class;
 
+#if IS_ENABLED(CONFIG_BRIDGE_MRP)
+	if (eth_hdr(skb)->h_proto == cpu_to_be16(ETH_P_MRP) &&
+	    cpuq & BIT(OCELOT_MRP_CPUQ))
+		skb->offload_fwd_mark = 0;
+#endif
+
 	/* Ocelot switches copy frames unmodified to the CPU. However, it is
 	 * possible for the user to request a VLAN modification through
 	 * VCAP_IS1_ACT_VID_REPLACE_ENA. In this case, what will happen is that