566 lines
18 KiB
C
566 lines
18 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* net/dsa/dsa_priv.h - Hardware switch handling
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* Copyright (c) 2008-2009 Marvell Semiconductor
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*/
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#ifndef __DSA_PRIV_H
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#define __DSA_PRIV_H
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#include <linux/if_bridge.h>
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#include <linux/phy.h>
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#include <linux/netdevice.h>
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#include <linux/netpoll.h>
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#include <net/dsa.h>
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#include <net/gro_cells.h>
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#define DSA_MAX_NUM_OFFLOADING_BRIDGES BITS_PER_LONG
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enum {
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DSA_NOTIFIER_AGEING_TIME,
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DSA_NOTIFIER_BRIDGE_JOIN,
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DSA_NOTIFIER_BRIDGE_LEAVE,
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DSA_NOTIFIER_FDB_ADD,
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DSA_NOTIFIER_FDB_DEL,
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DSA_NOTIFIER_HOST_FDB_ADD,
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DSA_NOTIFIER_HOST_FDB_DEL,
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DSA_NOTIFIER_HSR_JOIN,
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DSA_NOTIFIER_HSR_LEAVE,
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DSA_NOTIFIER_LAG_CHANGE,
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DSA_NOTIFIER_LAG_JOIN,
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DSA_NOTIFIER_LAG_LEAVE,
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DSA_NOTIFIER_MDB_ADD,
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DSA_NOTIFIER_MDB_DEL,
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DSA_NOTIFIER_HOST_MDB_ADD,
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DSA_NOTIFIER_HOST_MDB_DEL,
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DSA_NOTIFIER_VLAN_ADD,
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DSA_NOTIFIER_VLAN_DEL,
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DSA_NOTIFIER_MTU,
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DSA_NOTIFIER_TAG_PROTO,
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DSA_NOTIFIER_MRP_ADD,
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DSA_NOTIFIER_MRP_DEL,
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DSA_NOTIFIER_MRP_ADD_RING_ROLE,
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DSA_NOTIFIER_MRP_DEL_RING_ROLE,
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DSA_NOTIFIER_TAG_8021Q_VLAN_ADD,
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DSA_NOTIFIER_TAG_8021Q_VLAN_DEL,
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};
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/* DSA_NOTIFIER_AGEING_TIME */
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struct dsa_notifier_ageing_time_info {
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unsigned int ageing_time;
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};
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/* DSA_NOTIFIER_BRIDGE_* */
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struct dsa_notifier_bridge_info {
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struct net_device *br;
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int tree_index;
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int sw_index;
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int port;
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};
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/* DSA_NOTIFIER_FDB_* */
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struct dsa_notifier_fdb_info {
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int sw_index;
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int port;
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const unsigned char *addr;
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u16 vid;
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};
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/* DSA_NOTIFIER_MDB_* */
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struct dsa_notifier_mdb_info {
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const struct switchdev_obj_port_mdb *mdb;
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int sw_index;
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int port;
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};
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/* DSA_NOTIFIER_LAG_* */
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struct dsa_notifier_lag_info {
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struct net_device *lag;
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int sw_index;
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int port;
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struct netdev_lag_upper_info *info;
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};
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/* DSA_NOTIFIER_VLAN_* */
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struct dsa_notifier_vlan_info {
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const struct switchdev_obj_port_vlan *vlan;
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int sw_index;
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int port;
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struct netlink_ext_ack *extack;
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};
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/* DSA_NOTIFIER_MTU */
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struct dsa_notifier_mtu_info {
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bool targeted_match;
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int sw_index;
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int port;
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int mtu;
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};
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/* DSA_NOTIFIER_TAG_PROTO_* */
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struct dsa_notifier_tag_proto_info {
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const struct dsa_device_ops *tag_ops;
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};
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/* DSA_NOTIFIER_MRP_* */
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struct dsa_notifier_mrp_info {
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const struct switchdev_obj_mrp *mrp;
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int sw_index;
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int port;
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};
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/* DSA_NOTIFIER_MRP_* */
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struct dsa_notifier_mrp_ring_role_info {
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const struct switchdev_obj_ring_role_mrp *mrp;
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int sw_index;
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int port;
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};
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/* DSA_NOTIFIER_TAG_8021Q_VLAN_* */
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struct dsa_notifier_tag_8021q_vlan_info {
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int tree_index;
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int sw_index;
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int port;
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u16 vid;
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};
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struct dsa_switchdev_event_work {
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struct dsa_switch *ds;
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int port;
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struct net_device *dev;
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struct work_struct work;
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unsigned long event;
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/* Specific for SWITCHDEV_FDB_ADD_TO_DEVICE and
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* SWITCHDEV_FDB_DEL_TO_DEVICE
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*/
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unsigned char addr[ETH_ALEN];
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u16 vid;
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bool host_addr;
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};
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/* DSA_NOTIFIER_HSR_* */
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struct dsa_notifier_hsr_info {
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struct net_device *hsr;
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int sw_index;
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int port;
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};
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struct dsa_slave_priv {
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/* Copy of CPU port xmit for faster access in slave transmit hot path */
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struct sk_buff * (*xmit)(struct sk_buff *skb,
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struct net_device *dev);
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struct gro_cells gcells;
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/* DSA port data, such as switch, port index, etc. */
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struct dsa_port *dp;
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#ifdef CONFIG_NET_POLL_CONTROLLER
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struct netpoll *netpoll;
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#endif
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/* TC context */
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struct list_head mall_tc_list;
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};
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/* dsa.c */
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const struct dsa_device_ops *dsa_tag_driver_get(int tag_protocol);
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void dsa_tag_driver_put(const struct dsa_device_ops *ops);
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const struct dsa_device_ops *dsa_find_tagger_by_name(const char *buf);
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bool dsa_schedule_work(struct work_struct *work);
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void dsa_flush_workqueue(void);
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const char *dsa_tag_protocol_to_str(const struct dsa_device_ops *ops);
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static inline int dsa_tag_protocol_overhead(const struct dsa_device_ops *ops)
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{
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return ops->needed_headroom + ops->needed_tailroom;
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}
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/* master.c */
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int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp);
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void dsa_master_teardown(struct net_device *dev);
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static inline struct net_device *dsa_master_find_slave(struct net_device *dev,
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int device, int port)
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{
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struct dsa_port *cpu_dp = dev->dsa_ptr;
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struct dsa_switch_tree *dst = cpu_dp->dst;
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struct dsa_port *dp;
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list_for_each_entry(dp, &dst->ports, list)
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if (dp->ds->index == device && dp->index == port &&
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dp->type == DSA_PORT_TYPE_USER)
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return dp->slave;
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return NULL;
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}
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/* port.c */
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bool dsa_port_supports_hwtstamp(struct dsa_port *dp, struct ifreq *ifr);
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void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp,
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const struct dsa_device_ops *tag_ops);
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int dsa_port_set_state(struct dsa_port *dp, u8 state, bool do_fast_age);
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int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy);
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int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy);
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void dsa_port_disable_rt(struct dsa_port *dp);
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void dsa_port_disable(struct dsa_port *dp);
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int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br,
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struct netlink_ext_ack *extack);
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void dsa_port_pre_bridge_leave(struct dsa_port *dp, struct net_device *br);
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void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br);
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int dsa_port_lag_change(struct dsa_port *dp,
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struct netdev_lag_lower_state_info *linfo);
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int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag_dev,
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struct netdev_lag_upper_info *uinfo,
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struct netlink_ext_ack *extack);
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void dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag_dev);
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void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag_dev);
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int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
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struct netlink_ext_ack *extack);
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bool dsa_port_skip_vlan_configuration(struct dsa_port *dp);
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int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock);
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int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu,
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bool targeted_match);
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int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
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u16 vid);
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int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
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u16 vid);
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int dsa_port_host_fdb_add(struct dsa_port *dp, const unsigned char *addr,
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u16 vid);
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int dsa_port_host_fdb_del(struct dsa_port *dp, const unsigned char *addr,
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u16 vid);
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int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data);
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int dsa_port_mdb_add(const struct dsa_port *dp,
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const struct switchdev_obj_port_mdb *mdb);
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int dsa_port_mdb_del(const struct dsa_port *dp,
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const struct switchdev_obj_port_mdb *mdb);
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int dsa_port_host_mdb_add(const struct dsa_port *dp,
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const struct switchdev_obj_port_mdb *mdb);
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int dsa_port_host_mdb_del(const struct dsa_port *dp,
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const struct switchdev_obj_port_mdb *mdb);
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int dsa_port_pre_bridge_flags(const struct dsa_port *dp,
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struct switchdev_brport_flags flags,
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struct netlink_ext_ack *extack);
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int dsa_port_bridge_flags(struct dsa_port *dp,
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struct switchdev_brport_flags flags,
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struct netlink_ext_ack *extack);
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int dsa_port_vlan_add(struct dsa_port *dp,
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const struct switchdev_obj_port_vlan *vlan,
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struct netlink_ext_ack *extack);
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int dsa_port_vlan_del(struct dsa_port *dp,
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const struct switchdev_obj_port_vlan *vlan);
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int dsa_port_mrp_add(const struct dsa_port *dp,
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const struct switchdev_obj_mrp *mrp);
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int dsa_port_mrp_del(const struct dsa_port *dp,
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const struct switchdev_obj_mrp *mrp);
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int dsa_port_mrp_add_ring_role(const struct dsa_port *dp,
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const struct switchdev_obj_ring_role_mrp *mrp);
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int dsa_port_mrp_del_ring_role(const struct dsa_port *dp,
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const struct switchdev_obj_ring_role_mrp *mrp);
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int dsa_port_link_register_of(struct dsa_port *dp);
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void dsa_port_link_unregister_of(struct dsa_port *dp);
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int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr);
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void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr);
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int dsa_port_tag_8021q_vlan_add(struct dsa_port *dp, u16 vid, bool broadcast);
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void dsa_port_tag_8021q_vlan_del(struct dsa_port *dp, u16 vid, bool broadcast);
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extern const struct phylink_mac_ops dsa_port_phylink_mac_ops;
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static inline bool dsa_port_offloads_bridge_port(struct dsa_port *dp,
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const struct net_device *dev)
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{
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return dsa_port_to_bridge_port(dp) == dev;
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}
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static inline bool dsa_port_offloads_bridge(struct dsa_port *dp,
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const struct net_device *bridge_dev)
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{
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/* DSA ports connected to a bridge, and event was emitted
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* for the bridge.
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*/
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return dp->bridge_dev == bridge_dev;
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}
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/* Returns true if any port of this tree offloads the given net_device */
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static inline bool dsa_tree_offloads_bridge_port(struct dsa_switch_tree *dst,
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const struct net_device *dev)
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{
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struct dsa_port *dp;
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list_for_each_entry(dp, &dst->ports, list)
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if (dsa_port_offloads_bridge_port(dp, dev))
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return true;
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return false;
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}
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/* Returns true if any port of this tree offloads the given bridge */
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static inline bool dsa_tree_offloads_bridge(struct dsa_switch_tree *dst,
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const struct net_device *bridge_dev)
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{
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struct dsa_port *dp;
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list_for_each_entry(dp, &dst->ports, list)
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if (dsa_port_offloads_bridge(dp, bridge_dev))
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return true;
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return false;
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}
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/* slave.c */
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extern const struct dsa_device_ops notag_netdev_ops;
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extern struct notifier_block dsa_slave_switchdev_notifier;
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extern struct notifier_block dsa_slave_switchdev_blocking_notifier;
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void dsa_slave_mii_bus_init(struct dsa_switch *ds);
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int dsa_slave_create(struct dsa_port *dp);
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void dsa_slave_destroy(struct net_device *slave_dev);
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int dsa_slave_suspend(struct net_device *slave_dev);
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int dsa_slave_resume(struct net_device *slave_dev);
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int dsa_slave_register_notifier(void);
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void dsa_slave_unregister_notifier(void);
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void dsa_slave_setup_tagger(struct net_device *slave);
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int dsa_slave_change_mtu(struct net_device *dev, int new_mtu);
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int dsa_slave_manage_vlan_filtering(struct net_device *dev,
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bool vlan_filtering);
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static inline struct dsa_port *dsa_slave_to_port(const struct net_device *dev)
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{
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struct dsa_slave_priv *p = netdev_priv(dev);
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return p->dp;
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}
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static inline struct net_device *
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dsa_slave_to_master(const struct net_device *dev)
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{
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struct dsa_port *dp = dsa_slave_to_port(dev);
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return dp->cpu_dp->master;
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}
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/* If under a bridge with vlan_filtering=0, make sure to send pvid-tagged
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* frames as untagged, since the bridge will not untag them.
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*/
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static inline struct sk_buff *dsa_untag_bridge_pvid(struct sk_buff *skb)
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{
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struct dsa_port *dp = dsa_slave_to_port(skb->dev);
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struct net_device *br = dp->bridge_dev;
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struct net_device *dev = skb->dev;
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struct net_device *upper_dev;
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u16 vid, pvid, proto;
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int err;
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if (!br || br_vlan_enabled(br))
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return skb;
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err = br_vlan_get_proto(br, &proto);
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if (err)
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return skb;
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/* Move VLAN tag from data to hwaccel */
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if (!skb_vlan_tag_present(skb) && skb->protocol == htons(proto)) {
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skb = skb_vlan_untag(skb);
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if (!skb)
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return NULL;
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}
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if (!skb_vlan_tag_present(skb))
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return skb;
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vid = skb_vlan_tag_get_id(skb);
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/* We already run under an RCU read-side critical section since
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* we are called from netif_receive_skb_list_internal().
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*/
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err = br_vlan_get_pvid_rcu(dev, &pvid);
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if (err)
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return skb;
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if (vid != pvid)
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return skb;
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/* The sad part about attempting to untag from DSA is that we
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* don't know, unless we check, if the skb will end up in
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* the bridge's data path - br_allowed_ingress() - or not.
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* For example, there might be an 8021q upper for the
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* default_pvid of the bridge, which will steal VLAN-tagged traffic
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* from the bridge's data path. This is a configuration that DSA
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* supports because vlan_filtering is 0. In that case, we should
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* definitely keep the tag, to make sure it keeps working.
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*/
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upper_dev = __vlan_find_dev_deep_rcu(br, htons(proto), vid);
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if (upper_dev)
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return skb;
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__vlan_hwaccel_clear_tag(skb);
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return skb;
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}
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/* For switches without hardware support for DSA tagging to be able
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* to support termination through the bridge.
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*/
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static inline struct net_device *
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dsa_find_designated_bridge_port_by_vid(struct net_device *master, u16 vid)
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{
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struct dsa_port *cpu_dp = master->dsa_ptr;
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struct dsa_switch_tree *dst = cpu_dp->dst;
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struct bridge_vlan_info vinfo;
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struct net_device *slave;
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struct dsa_port *dp;
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int err;
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list_for_each_entry(dp, &dst->ports, list) {
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if (dp->type != DSA_PORT_TYPE_USER)
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continue;
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if (!dp->bridge_dev)
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continue;
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if (dp->stp_state != BR_STATE_LEARNING &&
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dp->stp_state != BR_STATE_FORWARDING)
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continue;
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/* Since the bridge might learn this packet, keep the CPU port
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* affinity with the port that will be used for the reply on
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* xmit.
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*/
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if (dp->cpu_dp != cpu_dp)
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continue;
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slave = dp->slave;
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err = br_vlan_get_info_rcu(slave, vid, &vinfo);
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if (err)
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continue;
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return slave;
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}
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return NULL;
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}
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/* If the ingress port offloads the bridge, we mark the frame as autonomously
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* forwarded by hardware, so the software bridge doesn't forward in twice, back
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* to us, because we already did. However, if we're in fallback mode and we do
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* software bridging, we are not offloading it, therefore the dp->bridge_dev
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* pointer is not populated, and flooding needs to be done by software (we are
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* effectively operating in standalone ports mode).
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*/
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static inline void dsa_default_offload_fwd_mark(struct sk_buff *skb)
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{
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struct dsa_port *dp = dsa_slave_to_port(skb->dev);
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skb->offload_fwd_mark = !!(dp->bridge_dev);
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}
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/* Helper for removing DSA header tags from packets in the RX path.
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* Must not be called before skb_pull(len).
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* skb->data
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* |
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* v
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* | | | | | | | | | | | | | | | | | | |
|
|
* +-----------------------+-----------------------+---------------+-------+
|
|
* | Destination MAC | Source MAC | DSA header | EType |
|
|
* +-----------------------+-----------------------+---------------+-------+
|
|
* | |
|
|
* <----- len -----> <----- len ----->
|
|
* |
|
|
* >>>>>>> v
|
|
* >>>>>>> | | | | | | | | | | | | | | |
|
|
* >>>>>>> +-----------------------+-----------------------+-------+
|
|
* >>>>>>> | Destination MAC | Source MAC | EType |
|
|
* +-----------------------+-----------------------+-------+
|
|
* ^
|
|
* |
|
|
* skb->data
|
|
*/
|
|
static inline void dsa_strip_etype_header(struct sk_buff *skb, int len)
|
|
{
|
|
memmove(skb->data - ETH_HLEN, skb->data - ETH_HLEN - len, 2 * ETH_ALEN);
|
|
}
|
|
|
|
/* Helper for creating space for DSA header tags in TX path packets.
|
|
* Must not be called before skb_push(len).
|
|
*
|
|
* Before:
|
|
*
|
|
* <<<<<<< | | | | | | | | | | | | | | |
|
|
* ^ <<<<<<< +-----------------------+-----------------------+-------+
|
|
* | <<<<<<< | Destination MAC | Source MAC | EType |
|
|
* | +-----------------------+-----------------------+-------+
|
|
* <----- len ----->
|
|
* |
|
|
* |
|
|
* skb->data
|
|
*
|
|
* After:
|
|
*
|
|
* | | | | | | | | | | | | | | | | | | |
|
|
* +-----------------------+-----------------------+---------------+-------+
|
|
* | Destination MAC | Source MAC | DSA header | EType |
|
|
* +-----------------------+-----------------------+---------------+-------+
|
|
* ^ | |
|
|
* | <----- len ----->
|
|
* skb->data
|
|
*/
|
|
static inline void dsa_alloc_etype_header(struct sk_buff *skb, int len)
|
|
{
|
|
memmove(skb->data, skb->data + len, 2 * ETH_ALEN);
|
|
}
|
|
|
|
/* On RX, eth_type_trans() on the DSA master pulls ETH_HLEN bytes starting from
|
|
* skb_mac_header(skb), which leaves skb->data pointing at the first byte after
|
|
* what the DSA master perceives as the EtherType (the beginning of the L3
|
|
* protocol). Since DSA EtherType header taggers treat the EtherType as part of
|
|
* the DSA tag itself, and the EtherType is 2 bytes in length, the DSA header
|
|
* is located 2 bytes behind skb->data. Note that EtherType in this context
|
|
* means the first 2 bytes of the DSA header, not the encapsulated EtherType
|
|
* that will become visible after the DSA header is stripped.
|
|
*/
|
|
static inline void *dsa_etype_header_pos_rx(struct sk_buff *skb)
|
|
{
|
|
return skb->data - 2;
|
|
}
|
|
|
|
/* On TX, skb->data points to skb_mac_header(skb), which means that EtherType
|
|
* header taggers start exactly where the EtherType is (the EtherType is
|
|
* treated as part of the DSA header).
|
|
*/
|
|
static inline void *dsa_etype_header_pos_tx(struct sk_buff *skb)
|
|
{
|
|
return skb->data + 2 * ETH_ALEN;
|
|
}
|
|
|
|
/* switch.c */
|
|
int dsa_switch_register_notifier(struct dsa_switch *ds);
|
|
void dsa_switch_unregister_notifier(struct dsa_switch *ds);
|
|
|
|
/* dsa2.c */
|
|
void dsa_lag_map(struct dsa_switch_tree *dst, struct net_device *lag);
|
|
void dsa_lag_unmap(struct dsa_switch_tree *dst, struct net_device *lag);
|
|
int dsa_tree_notify(struct dsa_switch_tree *dst, unsigned long e, void *v);
|
|
int dsa_broadcast(unsigned long e, void *v);
|
|
int dsa_tree_change_tag_proto(struct dsa_switch_tree *dst,
|
|
struct net_device *master,
|
|
const struct dsa_device_ops *tag_ops,
|
|
const struct dsa_device_ops *old_tag_ops);
|
|
int dsa_bridge_num_get(const struct net_device *bridge_dev, int max);
|
|
void dsa_bridge_num_put(const struct net_device *bridge_dev, int bridge_num);
|
|
|
|
/* tag_8021q.c */
|
|
int dsa_tag_8021q_bridge_join(struct dsa_switch *ds,
|
|
struct dsa_notifier_bridge_info *info);
|
|
int dsa_tag_8021q_bridge_leave(struct dsa_switch *ds,
|
|
struct dsa_notifier_bridge_info *info);
|
|
int dsa_switch_tag_8021q_vlan_add(struct dsa_switch *ds,
|
|
struct dsa_notifier_tag_8021q_vlan_info *info);
|
|
int dsa_switch_tag_8021q_vlan_del(struct dsa_switch *ds,
|
|
struct dsa_notifier_tag_8021q_vlan_info *info);
|
|
|
|
extern struct list_head dsa_tree_list;
|
|
|
|
#endif
|