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1a3ddb0b75
This patch extends the br_mrp_switchdev functions to be able to have a better understanding what cause the issue and if the SW needs to be used as a backup. There are the following cases: - when the code is compiled without CONFIG_NET_SWITCHDEV. In this case return success so the SW can continue with the protocol. Depending on the function, it returns 0 or BR_MRP_SW. - when code is compiled with CONFIG_NET_SWITCHDEV and the driver doesn't implement any MRP callbacks. In this case the HW can't run MRP so it just returns -EOPNOTSUPP. So the SW will stop further to configure the node. - when code is compiled with CONFIG_NET_SWITCHDEV and the driver fully supports any MRP functionality. In this case the SW doesn't need to do anything. The functions will return 0 or BR_MRP_HW. - when code is compiled with CONFIG_NET_SWITCHDEV and the HW can't run completely the protocol but it can help the SW to run it. For example, the HW can't support completely MRM role(can't detect when it stops receiving MRP Test frames) but it can redirect these frames to CPU. In this case it is possible to have a SW fallback. The SW will try initially to call the driver with sw_backup set to false, meaning that the HW should implement completely the role. If the driver returns -EOPNOTSUPP, the SW will try again with sw_backup set to false, meaning that the SW will detect when it stops receiving the frames but it needs HW support to redirect the frames to CPU. In case the driver returns 0 then the SW will continue to configure the node accordingly. Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com> Signed-off-by: David S. Miller <davem@davemloft.net>
138 lines
4.1 KiB
C
138 lines
4.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef _BR_PRIVATE_MRP_H_
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#define _BR_PRIVATE_MRP_H_
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#include "br_private.h"
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#include <uapi/linux/mrp_bridge.h>
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struct br_mrp {
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/* list of mrp instances */
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struct hlist_node list;
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struct net_bridge_port __rcu *p_port;
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struct net_bridge_port __rcu *s_port;
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struct net_bridge_port __rcu *i_port;
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u32 ring_id;
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u16 in_id;
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u16 prio;
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enum br_mrp_ring_role_type ring_role;
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u8 ring_role_offloaded;
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enum br_mrp_ring_state_type ring_state;
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u32 ring_transitions;
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enum br_mrp_in_role_type in_role;
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u8 in_role_offloaded;
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enum br_mrp_in_state_type in_state;
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u32 in_transitions;
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struct delayed_work test_work;
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u32 test_interval;
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unsigned long test_end;
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u32 test_count_miss;
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u32 test_max_miss;
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bool test_monitor;
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struct delayed_work in_test_work;
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u32 in_test_interval;
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unsigned long in_test_end;
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u32 in_test_count_miss;
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u32 in_test_max_miss;
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u32 seq_id;
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struct rcu_head rcu;
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};
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/* This type is returned by br_mrp_switchdev functions that allow to have a SW
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* backup in case the HW can't implement completely the protocol.
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* BR_MRP_NONE - means the HW can't run at all the protocol, so the SW stops
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* configuring the node anymore.
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* BR_MRP_SW - the HW can help the SW to run the protocol, by redirecting MRP
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* frames to CPU.
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* BR_MRP_HW - the HW can implement completely the protocol.
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*/
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enum br_mrp_hw_support {
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BR_MRP_NONE,
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BR_MRP_SW,
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BR_MRP_HW,
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};
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/* br_mrp.c */
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int br_mrp_add(struct net_bridge *br, struct br_mrp_instance *instance);
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int br_mrp_del(struct net_bridge *br, struct br_mrp_instance *instance);
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int br_mrp_set_port_state(struct net_bridge_port *p,
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enum br_mrp_port_state_type state);
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int br_mrp_set_port_role(struct net_bridge_port *p,
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enum br_mrp_port_role_type role);
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int br_mrp_set_ring_state(struct net_bridge *br,
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struct br_mrp_ring_state *state);
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int br_mrp_set_ring_role(struct net_bridge *br, struct br_mrp_ring_role *role);
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int br_mrp_start_test(struct net_bridge *br, struct br_mrp_start_test *test);
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int br_mrp_set_in_state(struct net_bridge *br, struct br_mrp_in_state *state);
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int br_mrp_set_in_role(struct net_bridge *br, struct br_mrp_in_role *role);
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int br_mrp_start_in_test(struct net_bridge *br,
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struct br_mrp_start_in_test *test);
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/* br_mrp_switchdev.c */
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int br_mrp_switchdev_add(struct net_bridge *br, struct br_mrp *mrp);
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int br_mrp_switchdev_del(struct net_bridge *br, struct br_mrp *mrp);
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enum br_mrp_hw_support
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br_mrp_switchdev_set_ring_role(struct net_bridge *br, struct br_mrp *mrp,
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enum br_mrp_ring_role_type role);
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int br_mrp_switchdev_set_ring_state(struct net_bridge *br, struct br_mrp *mrp,
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enum br_mrp_ring_state_type state);
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enum br_mrp_hw_support
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br_mrp_switchdev_send_ring_test(struct net_bridge *br, struct br_mrp *mrp,
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u32 interval, u8 max_miss, u32 period,
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bool monitor);
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int br_mrp_port_switchdev_set_state(struct net_bridge_port *p, u32 state);
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int br_mrp_port_switchdev_set_role(struct net_bridge_port *p,
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enum br_mrp_port_role_type role);
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enum br_mrp_hw_support
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br_mrp_switchdev_set_in_role(struct net_bridge *br, struct br_mrp *mrp,
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u16 in_id, u32 ring_id,
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enum br_mrp_in_role_type role);
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int br_mrp_switchdev_set_in_state(struct net_bridge *br, struct br_mrp *mrp,
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enum br_mrp_in_state_type state);
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enum br_mrp_hw_support
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br_mrp_switchdev_send_in_test(struct net_bridge *br, struct br_mrp *mrp,
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u32 interval, u8 max_miss, u32 period);
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/* br_mrp_netlink.c */
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int br_mrp_ring_port_open(struct net_device *dev, u8 loc);
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int br_mrp_in_port_open(struct net_device *dev, u8 loc);
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/* MRP protocol data units */
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struct br_mrp_tlv_hdr {
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__u8 type;
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__u8 length;
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};
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struct br_mrp_common_hdr {
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__be16 seq_id;
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__u8 domain[MRP_DOMAIN_UUID_LENGTH];
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};
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struct br_mrp_ring_test_hdr {
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__be16 prio;
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__u8 sa[ETH_ALEN];
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__be16 port_role;
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__be16 state;
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__be16 transitions;
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__be32 timestamp;
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} __attribute__((__packed__));
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struct br_mrp_in_test_hdr {
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__be16 id;
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__u8 sa[ETH_ALEN];
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__be16 port_role;
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__be16 state;
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__be16 transitions;
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__be32 timestamp;
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} __attribute__((__packed__));
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#endif /* _BR_PRIVATE_MRP_H */
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