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
17 enum {
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 */
31 struct dsa_notifier_ageing_time_info {
32 struct switchdev_trans *trans;
33 unsigned int ageing_time;
34 };
35
36 /* DSA_NOTIFIER_BRIDGE_* */
37 struct 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_* */
45 struct 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_* */
53 struct 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_* */
61 struct 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 */
69 struct dsa_notifier_mtu_info {
70 bool propagate_upstream;
71 int sw_index;
72 int port;
73 int mtu;
74 };
75
76 struct 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 */
97 const struct dsa_device_ops *dsa_tag_driver_get(int tag_protocol);
98 void dsa_tag_driver_put(const struct dsa_device_ops *ops);
99
100 bool dsa_schedule_work(struct work_struct *work);
101 const char *dsa_tag_protocol_to_str(const struct dsa_device_ops *ops);
102
103 int 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);
108 int 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 */
113 int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp);
114 void dsa_master_teardown(struct net_device *dev);
115
dsa_master_find_slave(struct net_device * dev,int device,int port)116 static 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 */
132 int dsa_port_set_state(struct dsa_port *dp, u8 state,
133 struct switchdev_trans *trans);
134 int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy);
135 int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy);
136 void dsa_port_disable_rt(struct dsa_port *dp);
137 void dsa_port_disable(struct dsa_port *dp);
138 int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br);
139 void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br);
140 int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
141 struct switchdev_trans *trans);
142 bool dsa_port_skip_vlan_configuration(struct dsa_port *dp);
143 int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock,
144 struct switchdev_trans *trans);
145 int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu,
146 bool propagate_upstream);
147 int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
148 u16 vid);
149 int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
150 u16 vid);
151 int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data);
152 int dsa_port_mdb_add(const struct dsa_port *dp,
153 const struct switchdev_obj_port_mdb *mdb,
154 struct switchdev_trans *trans);
155 int dsa_port_mdb_del(const struct dsa_port *dp,
156 const struct switchdev_obj_port_mdb *mdb);
157 int dsa_port_pre_bridge_flags(const struct dsa_port *dp, unsigned long flags,
158 struct switchdev_trans *trans);
159 int dsa_port_bridge_flags(const struct dsa_port *dp, unsigned long flags,
160 struct switchdev_trans *trans);
161 int dsa_port_mrouter(struct dsa_port *dp, bool mrouter,
162 struct switchdev_trans *trans);
163 int dsa_port_vlan_add(struct dsa_port *dp,
164 const struct switchdev_obj_port_vlan *vlan,
165 struct switchdev_trans *trans);
166 int dsa_port_vlan_del(struct dsa_port *dp,
167 const struct switchdev_obj_port_vlan *vlan);
168 int dsa_port_link_register_of(struct dsa_port *dp);
169 void dsa_port_link_unregister_of(struct dsa_port *dp);
170 extern const struct phylink_mac_ops dsa_port_phylink_mac_ops;
171
172 /* slave.c */
173 extern const struct dsa_device_ops notag_netdev_ops;
174 void dsa_slave_mii_bus_init(struct dsa_switch *ds);
175 int dsa_slave_create(struct dsa_port *dp);
176 void dsa_slave_destroy(struct net_device *slave_dev);
177 bool dsa_slave_dev_check(const struct net_device *dev);
178 int dsa_slave_suspend(struct net_device *slave_dev);
179 int dsa_slave_resume(struct net_device *slave_dev);
180 int dsa_slave_register_notifier(void);
181 void dsa_slave_unregister_notifier(void);
182
dsa_slave_to_port(const struct net_device * dev)183 static 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
190 static inline struct net_device *
dsa_slave_to_master(const struct net_device * dev)191 dsa_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 */
dsa_untag_bridge_pvid(struct sk_buff * skb)201 static 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 */
258 int dsa_switch_register_notifier(struct dsa_switch *ds);
259 void dsa_switch_unregister_notifier(struct dsa_switch *ds);
260
261 /* dsa2.c */
262 extern struct list_head dsa_tree_list;
263
264 #endif
265
