dsa_priv.h 7.5 KB

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