1/* SPDX-License-Identifier: GPL-2.0-or-later */ 2/* 3 * net/dsa/dsa_priv.h - Hardware switch handling 4 * Copyright (c) 2008-2009 Marvell Semiconductor 5 */ 6 7#ifndef __DSA_PRIV_H 8#define __DSA_PRIV_H 9 10#include <linux/if_bridge.h> 11#include <linux/phy.h> 12#include <linux/netdevice.h> 13#include <linux/netpoll.h> 14#include <net/dsa.h> 15#include <net/gro_cells.h> 16 17enum { 18 DSA_NOTIFIER_AGEING_TIME, 19 DSA_NOTIFIER_BRIDGE_JOIN, 20 DSA_NOTIFIER_BRIDGE_LEAVE, 21 DSA_NOTIFIER_FDB_ADD, 22 DSA_NOTIFIER_FDB_DEL, 23 DSA_NOTIFIER_MDB_ADD, 24 DSA_NOTIFIER_MDB_DEL, 25 DSA_NOTIFIER_VLAN_ADD, 26 DSA_NOTIFIER_VLAN_DEL, 27 DSA_NOTIFIER_MTU, 28}; 29 30/* DSA_NOTIFIER_AGEING_TIME */ 31struct dsa_notifier_ageing_time_info { 32 struct switchdev_trans *trans; 33 unsigned int ageing_time; 34}; 35 36/* DSA_NOTIFIER_BRIDGE_* */ 37struct dsa_notifier_bridge_info { 38 struct net_device *br; 39 int tree_index; 40 int sw_index; 41 int port; 42}; 43 44/* DSA_NOTIFIER_FDB_* */ 45struct dsa_notifier_fdb_info { 46 int sw_index; 47 int port; 48 const unsigned char *addr; 49 u16 vid; 50}; 51 52/* DSA_NOTIFIER_MDB_* */ 53struct dsa_notifier_mdb_info { 54 const struct switchdev_obj_port_mdb *mdb; 55 struct switchdev_trans *trans; 56 int sw_index; 57 int port; 58}; 59 60/* DSA_NOTIFIER_VLAN_* */ 61struct dsa_notifier_vlan_info { 62 const struct switchdev_obj_port_vlan *vlan; 63 struct switchdev_trans *trans; 64 int sw_index; 65 int port; 66}; 67 68/* DSA_NOTIFIER_MTU */ 69struct dsa_notifier_mtu_info { 70 bool propagate_upstream; 71 int sw_index; 72 int port; 73 int mtu; 74}; 75 76struct dsa_slave_priv { 77 /* Copy of CPU port xmit for faster access in slave transmit hot path */ 78 struct sk_buff * (*xmit)(struct sk_buff *skb, 79 struct net_device *dev); 80 81 struct pcpu_sw_netstats __percpu *stats64; 82 83 struct gro_cells gcells; 84 85 /* DSA port data, such as switch, port index, etc. */ 86 struct dsa_port *dp; 87 88#ifdef CONFIG_NET_POLL_CONTROLLER 89 struct netpoll *netpoll; 90#endif 91 92 /* TC context */ 93 struct list_head mall_tc_list; 94}; 95 96/* dsa.c */ 97const struct dsa_device_ops *dsa_tag_driver_get(int tag_protocol); 98void dsa_tag_driver_put(const struct dsa_device_ops *ops); 99 100bool dsa_schedule_work(struct work_struct *work); 101const char *dsa_tag_protocol_to_str(const struct dsa_device_ops *ops); 102 103int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], 104 struct net_device *dev, 105 const unsigned char *addr, u16 vid, 106 u16 flags, 107 struct netlink_ext_ack *extack); 108int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], 109 struct net_device *dev, 110 const unsigned char *addr, u16 vid); 111 112/* master.c */ 113int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp); 114void dsa_master_teardown(struct net_device *dev); 115 116static inline struct net_device *dsa_master_find_slave(struct net_device *dev, 117 int device, int port) 118{ 119 struct dsa_port *cpu_dp = dev->dsa_ptr; 120 struct dsa_switch_tree *dst = cpu_dp->dst; 121 struct dsa_port *dp; 122 123 list_for_each_entry(dp, &dst->ports, list) 124 if (dp->ds->index == device && dp->index == port && 125 dp->type == DSA_PORT_TYPE_USER) 126 return dp->slave; 127 128 return NULL; 129} 130 131/* port.c */ 132int dsa_port_set_state(struct dsa_port *dp, u8 state, 133 struct switchdev_trans *trans); 134int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy); 135int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy); 136void dsa_port_disable_rt(struct dsa_port *dp); 137void dsa_port_disable(struct dsa_port *dp); 138int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br); 139void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br); 140int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering, 141 struct switchdev_trans *trans); 142bool dsa_port_skip_vlan_configuration(struct dsa_port *dp); 143int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock, 144 struct switchdev_trans *trans); 145int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu, 146 bool propagate_upstream); 147int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr, 148 u16 vid); 149int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr, 150 u16 vid); 151int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data); 152int dsa_port_mdb_add(const struct dsa_port *dp, 153 const struct switchdev_obj_port_mdb *mdb, 154 struct switchdev_trans *trans); 155int dsa_port_mdb_del(const struct dsa_port *dp, 156 const struct switchdev_obj_port_mdb *mdb); 157int dsa_port_pre_bridge_flags(const struct dsa_port *dp, unsigned long flags, 158 struct switchdev_trans *trans); 159int dsa_port_bridge_flags(const struct dsa_port *dp, unsigned long flags, 160 struct switchdev_trans *trans); 161int dsa_port_mrouter(struct dsa_port *dp, bool mrouter, 162 struct switchdev_trans *trans); 163int dsa_port_vlan_add(struct dsa_port *dp, 164 const struct switchdev_obj_port_vlan *vlan, 165 struct switchdev_trans *trans); 166int dsa_port_vlan_del(struct dsa_port *dp, 167 const struct switchdev_obj_port_vlan *vlan); 168int dsa_port_link_register_of(struct dsa_port *dp); 169void dsa_port_link_unregister_of(struct dsa_port *dp); 170extern const struct phylink_mac_ops dsa_port_phylink_mac_ops; 171 172/* slave.c */ 173extern const struct dsa_device_ops notag_netdev_ops; 174void dsa_slave_mii_bus_init(struct dsa_switch *ds); 175int dsa_slave_create(struct dsa_port *dp); 176void dsa_slave_destroy(struct net_device *slave_dev); 177bool dsa_slave_dev_check(const struct net_device *dev); 178int dsa_slave_suspend(struct net_device *slave_dev); 179int dsa_slave_resume(struct net_device *slave_dev); 180int dsa_slave_register_notifier(void); 181void dsa_slave_unregister_notifier(void); 182 183static inline struct dsa_port *dsa_slave_to_port(const struct net_device *dev) 184{ 185 struct dsa_slave_priv *p = netdev_priv(dev); 186 187 return p->dp; 188} 189 190static inline struct net_device * 191dsa_slave_to_master(const struct net_device *dev) 192{ 193 struct dsa_port *dp = dsa_slave_to_port(dev); 194 195 return dp->cpu_dp->master; 196} 197 198/* If under a bridge with vlan_filtering=0, make sure to send pvid-tagged 199 * frames as untagged, since the bridge will not untag them. 200 */ 201static inline struct sk_buff *dsa_untag_bridge_pvid(struct sk_buff *skb) 202{ 203 struct dsa_port *dp = dsa_slave_to_port(skb->dev); 204 struct net_device *br = dp->bridge_dev; 205 struct net_device *dev = skb->dev; 206 struct net_device *upper_dev; 207 u16 vid, pvid, proto; 208 int err; 209 210 if (!br || br_vlan_enabled(br)) 211 return skb; 212 213 err = br_vlan_get_proto(br, &proto); 214 if (err) 215 return skb; 216 217 /* Move VLAN tag from data to hwaccel */ 218 if (!skb_vlan_tag_present(skb) && skb->protocol == htons(proto)) { 219 skb = skb_vlan_untag(skb); 220 if (!skb) 221 return NULL; 222 } 223 224 if (!skb_vlan_tag_present(skb)) 225 return skb; 226 227 vid = skb_vlan_tag_get_id(skb); 228 229 /* We already run under an RCU read-side critical section since 230 * we are called from netif_receive_skb_list_internal(). 231 */ 232 err = br_vlan_get_pvid_rcu(dev, &pvid); 233 if (err) 234 return skb; 235 236 if (vid != pvid) 237 return skb; 238 239 /* The sad part about attempting to untag from DSA is that we 240 * don't know, unless we check, if the skb will end up in 241 * the bridge's data path - br_allowed_ingress() - or not. 242 * For example, there might be an 8021q upper for the 243 * default_pvid of the bridge, which will steal VLAN-tagged traffic 244 * from the bridge's data path. This is a configuration that DSA 245 * supports because vlan_filtering is 0. In that case, we should 246 * definitely keep the tag, to make sure it keeps working. 247 */ 248 upper_dev = __vlan_find_dev_deep_rcu(br, htons(proto), vid); 249 if (upper_dev) 250 return skb; 251 252 __vlan_hwaccel_clear_tag(skb); 253 254 return skb; 255} 256 257/* switch.c */ 258int dsa_switch_register_notifier(struct dsa_switch *ds); 259void dsa_switch_unregister_notifier(struct dsa_switch *ds); 260 261/* dsa2.c */ 262extern struct list_head dsa_tree_list; 263 264#endif 265