slave.c 87 KB

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  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * net/dsa/slave.c - Slave device handling
  4. * Copyright (c) 2008-2009 Marvell Semiconductor
  5. */
  6. #include <linux/list.h>
  7. #include <linux/etherdevice.h>
  8. #include <linux/netdevice.h>
  9. #include <linux/phy.h>
  10. #include <linux/phy_fixed.h>
  11. #include <linux/phylink.h>
  12. #include <linux/of_net.h>
  13. #include <linux/of_mdio.h>
  14. #include <linux/mdio.h>
  15. #include <net/rtnetlink.h>
  16. #include <net/pkt_cls.h>
  17. #include <net/selftests.h>
  18. #include <net/tc_act/tc_mirred.h>
  19. #include <linux/if_bridge.h>
  20. #include <linux/if_hsr.h>
  21. #include <net/dcbnl.h>
  22. #include <linux/netpoll.h>
  23. #include "dsa_priv.h"
  24. static void dsa_slave_standalone_event_work(struct work_struct *work)
  25. {
  26. struct dsa_standalone_event_work *standalone_work =
  27. container_of(work, struct dsa_standalone_event_work, work);
  28. const unsigned char *addr = standalone_work->addr;
  29. struct net_device *dev = standalone_work->dev;
  30. struct dsa_port *dp = dsa_slave_to_port(dev);
  31. struct switchdev_obj_port_mdb mdb;
  32. struct dsa_switch *ds = dp->ds;
  33. u16 vid = standalone_work->vid;
  34. int err;
  35. switch (standalone_work->event) {
  36. case DSA_UC_ADD:
  37. err = dsa_port_standalone_host_fdb_add(dp, addr, vid);
  38. if (err) {
  39. dev_err(ds->dev,
  40. "port %d failed to add %pM vid %d to fdb: %d\n",
  41. dp->index, addr, vid, err);
  42. break;
  43. }
  44. break;
  45. case DSA_UC_DEL:
  46. err = dsa_port_standalone_host_fdb_del(dp, addr, vid);
  47. if (err) {
  48. dev_err(ds->dev,
  49. "port %d failed to delete %pM vid %d from fdb: %d\n",
  50. dp->index, addr, vid, err);
  51. }
  52. break;
  53. case DSA_MC_ADD:
  54. ether_addr_copy(mdb.addr, addr);
  55. mdb.vid = vid;
  56. err = dsa_port_standalone_host_mdb_add(dp, &mdb);
  57. if (err) {
  58. dev_err(ds->dev,
  59. "port %d failed to add %pM vid %d to mdb: %d\n",
  60. dp->index, addr, vid, err);
  61. break;
  62. }
  63. break;
  64. case DSA_MC_DEL:
  65. ether_addr_copy(mdb.addr, addr);
  66. mdb.vid = vid;
  67. err = dsa_port_standalone_host_mdb_del(dp, &mdb);
  68. if (err) {
  69. dev_err(ds->dev,
  70. "port %d failed to delete %pM vid %d from mdb: %d\n",
  71. dp->index, addr, vid, err);
  72. }
  73. break;
  74. }
  75. kfree(standalone_work);
  76. }
  77. static int dsa_slave_schedule_standalone_work(struct net_device *dev,
  78. enum dsa_standalone_event event,
  79. const unsigned char *addr,
  80. u16 vid)
  81. {
  82. struct dsa_standalone_event_work *standalone_work;
  83. standalone_work = kzalloc(sizeof(*standalone_work), GFP_ATOMIC);
  84. if (!standalone_work)
  85. return -ENOMEM;
  86. INIT_WORK(&standalone_work->work, dsa_slave_standalone_event_work);
  87. standalone_work->event = event;
  88. standalone_work->dev = dev;
  89. ether_addr_copy(standalone_work->addr, addr);
  90. standalone_work->vid = vid;
  91. dsa_schedule_work(&standalone_work->work);
  92. return 0;
  93. }
  94. static int dsa_slave_sync_uc(struct net_device *dev,
  95. const unsigned char *addr)
  96. {
  97. struct net_device *master = dsa_slave_to_master(dev);
  98. struct dsa_port *dp = dsa_slave_to_port(dev);
  99. dev_uc_add(master, addr);
  100. if (!dsa_switch_supports_uc_filtering(dp->ds))
  101. return 0;
  102. return dsa_slave_schedule_standalone_work(dev, DSA_UC_ADD, addr, 0);
  103. }
  104. static int dsa_slave_unsync_uc(struct net_device *dev,
  105. const unsigned char *addr)
  106. {
  107. struct net_device *master = dsa_slave_to_master(dev);
  108. struct dsa_port *dp = dsa_slave_to_port(dev);
  109. dev_uc_del(master, addr);
  110. if (!dsa_switch_supports_uc_filtering(dp->ds))
  111. return 0;
  112. return dsa_slave_schedule_standalone_work(dev, DSA_UC_DEL, addr, 0);
  113. }
  114. static int dsa_slave_sync_mc(struct net_device *dev,
  115. const unsigned char *addr)
  116. {
  117. struct net_device *master = dsa_slave_to_master(dev);
  118. struct dsa_port *dp = dsa_slave_to_port(dev);
  119. dev_mc_add(master, addr);
  120. if (!dsa_switch_supports_mc_filtering(dp->ds))
  121. return 0;
  122. return dsa_slave_schedule_standalone_work(dev, DSA_MC_ADD, addr, 0);
  123. }
  124. static int dsa_slave_unsync_mc(struct net_device *dev,
  125. const unsigned char *addr)
  126. {
  127. struct net_device *master = dsa_slave_to_master(dev);
  128. struct dsa_port *dp = dsa_slave_to_port(dev);
  129. dev_mc_del(master, addr);
  130. if (!dsa_switch_supports_mc_filtering(dp->ds))
  131. return 0;
  132. return dsa_slave_schedule_standalone_work(dev, DSA_MC_DEL, addr, 0);
  133. }
  134. void dsa_slave_sync_ha(struct net_device *dev)
  135. {
  136. struct dsa_port *dp = dsa_slave_to_port(dev);
  137. struct dsa_switch *ds = dp->ds;
  138. struct netdev_hw_addr *ha;
  139. netif_addr_lock_bh(dev);
  140. netdev_for_each_synced_mc_addr(ha, dev)
  141. dsa_slave_sync_mc(dev, ha->addr);
  142. netdev_for_each_synced_uc_addr(ha, dev)
  143. dsa_slave_sync_uc(dev, ha->addr);
  144. netif_addr_unlock_bh(dev);
  145. if (dsa_switch_supports_uc_filtering(ds) ||
  146. dsa_switch_supports_mc_filtering(ds))
  147. dsa_flush_workqueue();
  148. }
  149. void dsa_slave_unsync_ha(struct net_device *dev)
  150. {
  151. struct dsa_port *dp = dsa_slave_to_port(dev);
  152. struct dsa_switch *ds = dp->ds;
  153. struct netdev_hw_addr *ha;
  154. netif_addr_lock_bh(dev);
  155. netdev_for_each_synced_uc_addr(ha, dev)
  156. dsa_slave_unsync_uc(dev, ha->addr);
  157. netdev_for_each_synced_mc_addr(ha, dev)
  158. dsa_slave_unsync_mc(dev, ha->addr);
  159. netif_addr_unlock_bh(dev);
  160. if (dsa_switch_supports_uc_filtering(ds) ||
  161. dsa_switch_supports_mc_filtering(ds))
  162. dsa_flush_workqueue();
  163. }
  164. /* slave mii_bus handling ***************************************************/
  165. static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
  166. {
  167. struct dsa_switch *ds = bus->priv;
  168. if (ds->phys_mii_mask & (1 << addr))
  169. return ds->ops->phy_read(ds, addr, reg);
  170. return 0xffff;
  171. }
  172. static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
  173. {
  174. struct dsa_switch *ds = bus->priv;
  175. if (ds->phys_mii_mask & (1 << addr))
  176. return ds->ops->phy_write(ds, addr, reg, val);
  177. return 0;
  178. }
  179. void dsa_slave_mii_bus_init(struct dsa_switch *ds)
  180. {
  181. ds->slave_mii_bus->priv = (void *)ds;
  182. ds->slave_mii_bus->name = "dsa slave smi";
  183. ds->slave_mii_bus->read = dsa_slave_phy_read;
  184. ds->slave_mii_bus->write = dsa_slave_phy_write;
  185. snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
  186. ds->dst->index, ds->index);
  187. ds->slave_mii_bus->parent = ds->dev;
  188. ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
  189. }
  190. /* slave device handling ****************************************************/
  191. static int dsa_slave_get_iflink(const struct net_device *dev)
  192. {
  193. return dsa_slave_to_master(dev)->ifindex;
  194. }
  195. static int dsa_slave_open(struct net_device *dev)
  196. {
  197. struct net_device *master = dsa_slave_to_master(dev);
  198. struct dsa_port *dp = dsa_slave_to_port(dev);
  199. struct dsa_switch *ds = dp->ds;
  200. int err;
  201. err = dev_open(master, NULL);
  202. if (err < 0) {
  203. netdev_err(dev, "failed to open master %s\n", master->name);
  204. goto out;
  205. }
  206. if (dsa_switch_supports_uc_filtering(ds)) {
  207. err = dsa_port_standalone_host_fdb_add(dp, dev->dev_addr, 0);
  208. if (err)
  209. goto out;
  210. }
  211. if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
  212. err = dev_uc_add(master, dev->dev_addr);
  213. if (err < 0)
  214. goto del_host_addr;
  215. }
  216. err = dsa_port_enable_rt(dp, dev->phydev);
  217. if (err)
  218. goto del_unicast;
  219. return 0;
  220. del_unicast:
  221. if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
  222. dev_uc_del(master, dev->dev_addr);
  223. del_host_addr:
  224. if (dsa_switch_supports_uc_filtering(ds))
  225. dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
  226. out:
  227. return err;
  228. }
  229. static int dsa_slave_close(struct net_device *dev)
  230. {
  231. struct net_device *master = dsa_slave_to_master(dev);
  232. struct dsa_port *dp = dsa_slave_to_port(dev);
  233. struct dsa_switch *ds = dp->ds;
  234. dsa_port_disable_rt(dp);
  235. if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
  236. dev_uc_del(master, dev->dev_addr);
  237. if (dsa_switch_supports_uc_filtering(ds))
  238. dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
  239. return 0;
  240. }
  241. static void dsa_slave_manage_host_flood(struct net_device *dev)
  242. {
  243. bool mc = dev->flags & (IFF_PROMISC | IFF_ALLMULTI);
  244. struct dsa_port *dp = dsa_slave_to_port(dev);
  245. bool uc = dev->flags & IFF_PROMISC;
  246. dsa_port_set_host_flood(dp, uc, mc);
  247. }
  248. static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
  249. {
  250. struct net_device *master = dsa_slave_to_master(dev);
  251. struct dsa_port *dp = dsa_slave_to_port(dev);
  252. struct dsa_switch *ds = dp->ds;
  253. if (change & IFF_ALLMULTI)
  254. dev_set_allmulti(master,
  255. dev->flags & IFF_ALLMULTI ? 1 : -1);
  256. if (change & IFF_PROMISC)
  257. dev_set_promiscuity(master,
  258. dev->flags & IFF_PROMISC ? 1 : -1);
  259. if (dsa_switch_supports_uc_filtering(ds) &&
  260. dsa_switch_supports_mc_filtering(ds))
  261. dsa_slave_manage_host_flood(dev);
  262. }
  263. static void dsa_slave_set_rx_mode(struct net_device *dev)
  264. {
  265. __dev_mc_sync(dev, dsa_slave_sync_mc, dsa_slave_unsync_mc);
  266. __dev_uc_sync(dev, dsa_slave_sync_uc, dsa_slave_unsync_uc);
  267. }
  268. static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
  269. {
  270. struct net_device *master = dsa_slave_to_master(dev);
  271. struct dsa_port *dp = dsa_slave_to_port(dev);
  272. struct dsa_switch *ds = dp->ds;
  273. struct sockaddr *addr = a;
  274. int err;
  275. if (!is_valid_ether_addr(addr->sa_data))
  276. return -EADDRNOTAVAIL;
  277. /* If the port is down, the address isn't synced yet to hardware or
  278. * to the DSA master, so there is nothing to change.
  279. */
  280. if (!(dev->flags & IFF_UP))
  281. goto out_change_dev_addr;
  282. if (dsa_switch_supports_uc_filtering(ds)) {
  283. err = dsa_port_standalone_host_fdb_add(dp, addr->sa_data, 0);
  284. if (err)
  285. return err;
  286. }
  287. if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
  288. err = dev_uc_add(master, addr->sa_data);
  289. if (err < 0)
  290. goto del_unicast;
  291. }
  292. if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
  293. dev_uc_del(master, dev->dev_addr);
  294. if (dsa_switch_supports_uc_filtering(ds))
  295. dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
  296. out_change_dev_addr:
  297. eth_hw_addr_set(dev, addr->sa_data);
  298. return 0;
  299. del_unicast:
  300. if (dsa_switch_supports_uc_filtering(ds))
  301. dsa_port_standalone_host_fdb_del(dp, addr->sa_data, 0);
  302. return err;
  303. }
  304. struct dsa_slave_dump_ctx {
  305. struct net_device *dev;
  306. struct sk_buff *skb;
  307. struct netlink_callback *cb;
  308. int idx;
  309. };
  310. static int
  311. dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
  312. bool is_static, void *data)
  313. {
  314. struct dsa_slave_dump_ctx *dump = data;
  315. u32 portid = NETLINK_CB(dump->cb->skb).portid;
  316. u32 seq = dump->cb->nlh->nlmsg_seq;
  317. struct nlmsghdr *nlh;
  318. struct ndmsg *ndm;
  319. if (dump->idx < dump->cb->args[2])
  320. goto skip;
  321. nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
  322. sizeof(*ndm), NLM_F_MULTI);
  323. if (!nlh)
  324. return -EMSGSIZE;
  325. ndm = nlmsg_data(nlh);
  326. ndm->ndm_family = AF_BRIDGE;
  327. ndm->ndm_pad1 = 0;
  328. ndm->ndm_pad2 = 0;
  329. ndm->ndm_flags = NTF_SELF;
  330. ndm->ndm_type = 0;
  331. ndm->ndm_ifindex = dump->dev->ifindex;
  332. ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
  333. if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
  334. goto nla_put_failure;
  335. if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
  336. goto nla_put_failure;
  337. nlmsg_end(dump->skb, nlh);
  338. skip:
  339. dump->idx++;
  340. return 0;
  341. nla_put_failure:
  342. nlmsg_cancel(dump->skb, nlh);
  343. return -EMSGSIZE;
  344. }
  345. static int
  346. dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
  347. struct net_device *dev, struct net_device *filter_dev,
  348. int *idx)
  349. {
  350. struct dsa_port *dp = dsa_slave_to_port(dev);
  351. struct dsa_slave_dump_ctx dump = {
  352. .dev = dev,
  353. .skb = skb,
  354. .cb = cb,
  355. .idx = *idx,
  356. };
  357. int err;
  358. err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
  359. *idx = dump.idx;
  360. return err;
  361. }
  362. static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
  363. {
  364. struct dsa_slave_priv *p = netdev_priv(dev);
  365. struct dsa_switch *ds = p->dp->ds;
  366. int port = p->dp->index;
  367. /* Pass through to switch driver if it supports timestamping */
  368. switch (cmd) {
  369. case SIOCGHWTSTAMP:
  370. if (ds->ops->port_hwtstamp_get)
  371. return ds->ops->port_hwtstamp_get(ds, port, ifr);
  372. break;
  373. case SIOCSHWTSTAMP:
  374. if (ds->ops->port_hwtstamp_set)
  375. return ds->ops->port_hwtstamp_set(ds, port, ifr);
  376. break;
  377. }
  378. return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
  379. }
  380. static int dsa_slave_port_attr_set(struct net_device *dev, const void *ctx,
  381. const struct switchdev_attr *attr,
  382. struct netlink_ext_ack *extack)
  383. {
  384. struct dsa_port *dp = dsa_slave_to_port(dev);
  385. int ret;
  386. if (ctx && ctx != dp)
  387. return 0;
  388. switch (attr->id) {
  389. case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
  390. if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
  391. return -EOPNOTSUPP;
  392. ret = dsa_port_set_state(dp, attr->u.stp_state, true);
  393. break;
  394. case SWITCHDEV_ATTR_ID_PORT_MST_STATE:
  395. if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
  396. return -EOPNOTSUPP;
  397. ret = dsa_port_set_mst_state(dp, &attr->u.mst_state, extack);
  398. break;
  399. case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
  400. if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
  401. return -EOPNOTSUPP;
  402. ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
  403. extack);
  404. break;
  405. case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
  406. if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
  407. return -EOPNOTSUPP;
  408. ret = dsa_port_ageing_time(dp, attr->u.ageing_time);
  409. break;
  410. case SWITCHDEV_ATTR_ID_BRIDGE_MST:
  411. if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
  412. return -EOPNOTSUPP;
  413. ret = dsa_port_mst_enable(dp, attr->u.mst, extack);
  414. break;
  415. case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
  416. if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
  417. return -EOPNOTSUPP;
  418. ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags,
  419. extack);
  420. break;
  421. case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
  422. if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
  423. return -EOPNOTSUPP;
  424. ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack);
  425. break;
  426. case SWITCHDEV_ATTR_ID_VLAN_MSTI:
  427. if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
  428. return -EOPNOTSUPP;
  429. ret = dsa_port_vlan_msti(dp, &attr->u.vlan_msti);
  430. break;
  431. default:
  432. ret = -EOPNOTSUPP;
  433. break;
  434. }
  435. return ret;
  436. }
  437. /* Must be called under rcu_read_lock() */
  438. static int
  439. dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave,
  440. const struct switchdev_obj_port_vlan *vlan)
  441. {
  442. struct net_device *upper_dev;
  443. struct list_head *iter;
  444. netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
  445. u16 vid;
  446. if (!is_vlan_dev(upper_dev))
  447. continue;
  448. vid = vlan_dev_vlan_id(upper_dev);
  449. if (vid == vlan->vid)
  450. return -EBUSY;
  451. }
  452. return 0;
  453. }
  454. static int dsa_slave_vlan_add(struct net_device *dev,
  455. const struct switchdev_obj *obj,
  456. struct netlink_ext_ack *extack)
  457. {
  458. struct dsa_port *dp = dsa_slave_to_port(dev);
  459. struct switchdev_obj_port_vlan *vlan;
  460. int err;
  461. if (dsa_port_skip_vlan_configuration(dp)) {
  462. NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
  463. return 0;
  464. }
  465. vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
  466. /* Deny adding a bridge VLAN when there is already an 802.1Q upper with
  467. * the same VID.
  468. */
  469. if (br_vlan_enabled(dsa_port_bridge_dev_get(dp))) {
  470. rcu_read_lock();
  471. err = dsa_slave_vlan_check_for_8021q_uppers(dev, vlan);
  472. rcu_read_unlock();
  473. if (err) {
  474. NL_SET_ERR_MSG_MOD(extack,
  475. "Port already has a VLAN upper with this VID");
  476. return err;
  477. }
  478. }
  479. return dsa_port_vlan_add(dp, vlan, extack);
  480. }
  481. /* Offload a VLAN installed on the bridge or on a foreign interface by
  482. * installing it as a VLAN towards the CPU port.
  483. */
  484. static int dsa_slave_host_vlan_add(struct net_device *dev,
  485. const struct switchdev_obj *obj,
  486. struct netlink_ext_ack *extack)
  487. {
  488. struct dsa_port *dp = dsa_slave_to_port(dev);
  489. struct switchdev_obj_port_vlan vlan;
  490. /* Do nothing if this is a software bridge */
  491. if (!dp->bridge)
  492. return -EOPNOTSUPP;
  493. if (dsa_port_skip_vlan_configuration(dp)) {
  494. NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
  495. return 0;
  496. }
  497. vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
  498. /* Even though drivers often handle CPU membership in special ways,
  499. * it doesn't make sense to program a PVID, so clear this flag.
  500. */
  501. vlan.flags &= ~BRIDGE_VLAN_INFO_PVID;
  502. return dsa_port_host_vlan_add(dp, &vlan, extack);
  503. }
  504. static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx,
  505. const struct switchdev_obj *obj,
  506. struct netlink_ext_ack *extack)
  507. {
  508. struct dsa_port *dp = dsa_slave_to_port(dev);
  509. int err;
  510. if (ctx && ctx != dp)
  511. return 0;
  512. switch (obj->id) {
  513. case SWITCHDEV_OBJ_ID_PORT_MDB:
  514. if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
  515. return -EOPNOTSUPP;
  516. err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
  517. break;
  518. case SWITCHDEV_OBJ_ID_HOST_MDB:
  519. if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
  520. return -EOPNOTSUPP;
  521. err = dsa_port_bridge_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
  522. break;
  523. case SWITCHDEV_OBJ_ID_PORT_VLAN:
  524. if (dsa_port_offloads_bridge_port(dp, obj->orig_dev))
  525. err = dsa_slave_vlan_add(dev, obj, extack);
  526. else
  527. err = dsa_slave_host_vlan_add(dev, obj, extack);
  528. break;
  529. case SWITCHDEV_OBJ_ID_MRP:
  530. if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
  531. return -EOPNOTSUPP;
  532. err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj));
  533. break;
  534. case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
  535. if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
  536. return -EOPNOTSUPP;
  537. err = dsa_port_mrp_add_ring_role(dp,
  538. SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
  539. break;
  540. default:
  541. err = -EOPNOTSUPP;
  542. break;
  543. }
  544. return err;
  545. }
  546. static int dsa_slave_vlan_del(struct net_device *dev,
  547. const struct switchdev_obj *obj)
  548. {
  549. struct dsa_port *dp = dsa_slave_to_port(dev);
  550. struct switchdev_obj_port_vlan *vlan;
  551. if (dsa_port_skip_vlan_configuration(dp))
  552. return 0;
  553. vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
  554. return dsa_port_vlan_del(dp, vlan);
  555. }
  556. static int dsa_slave_host_vlan_del(struct net_device *dev,
  557. const struct switchdev_obj *obj)
  558. {
  559. struct dsa_port *dp = dsa_slave_to_port(dev);
  560. struct switchdev_obj_port_vlan *vlan;
  561. /* Do nothing if this is a software bridge */
  562. if (!dp->bridge)
  563. return -EOPNOTSUPP;
  564. if (dsa_port_skip_vlan_configuration(dp))
  565. return 0;
  566. vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
  567. return dsa_port_host_vlan_del(dp, vlan);
  568. }
  569. static int dsa_slave_port_obj_del(struct net_device *dev, const void *ctx,
  570. const struct switchdev_obj *obj)
  571. {
  572. struct dsa_port *dp = dsa_slave_to_port(dev);
  573. int err;
  574. if (ctx && ctx != dp)
  575. return 0;
  576. switch (obj->id) {
  577. case SWITCHDEV_OBJ_ID_PORT_MDB:
  578. if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
  579. return -EOPNOTSUPP;
  580. err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
  581. break;
  582. case SWITCHDEV_OBJ_ID_HOST_MDB:
  583. if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
  584. return -EOPNOTSUPP;
  585. err = dsa_port_bridge_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
  586. break;
  587. case SWITCHDEV_OBJ_ID_PORT_VLAN:
  588. if (dsa_port_offloads_bridge_port(dp, obj->orig_dev))
  589. err = dsa_slave_vlan_del(dev, obj);
  590. else
  591. err = dsa_slave_host_vlan_del(dev, obj);
  592. break;
  593. case SWITCHDEV_OBJ_ID_MRP:
  594. if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
  595. return -EOPNOTSUPP;
  596. err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj));
  597. break;
  598. case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
  599. if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
  600. return -EOPNOTSUPP;
  601. err = dsa_port_mrp_del_ring_role(dp,
  602. SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
  603. break;
  604. default:
  605. err = -EOPNOTSUPP;
  606. break;
  607. }
  608. return err;
  609. }
  610. static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
  611. struct sk_buff *skb)
  612. {
  613. #ifdef CONFIG_NET_POLL_CONTROLLER
  614. struct dsa_slave_priv *p = netdev_priv(dev);
  615. return netpoll_send_skb(p->netpoll, skb);
  616. #else
  617. BUG();
  618. return NETDEV_TX_OK;
  619. #endif
  620. }
  621. static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
  622. struct sk_buff *skb)
  623. {
  624. struct dsa_switch *ds = p->dp->ds;
  625. if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
  626. return;
  627. if (!ds->ops->port_txtstamp)
  628. return;
  629. ds->ops->port_txtstamp(ds, p->dp->index, skb);
  630. }
  631. netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
  632. {
  633. /* SKB for netpoll still need to be mangled with the protocol-specific
  634. * tag to be successfully transmitted
  635. */
  636. if (unlikely(netpoll_tx_running(dev)))
  637. return dsa_slave_netpoll_send_skb(dev, skb);
  638. /* Queue the SKB for transmission on the parent interface, but
  639. * do not modify its EtherType
  640. */
  641. skb->dev = dsa_slave_to_master(dev);
  642. dev_queue_xmit(skb);
  643. return NETDEV_TX_OK;
  644. }
  645. EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
  646. static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev)
  647. {
  648. int needed_headroom = dev->needed_headroom;
  649. int needed_tailroom = dev->needed_tailroom;
  650. /* For tail taggers, we need to pad short frames ourselves, to ensure
  651. * that the tail tag does not fail at its role of being at the end of
  652. * the packet, once the master interface pads the frame. Account for
  653. * that pad length here, and pad later.
  654. */
  655. if (unlikely(needed_tailroom && skb->len < ETH_ZLEN))
  656. needed_tailroom += ETH_ZLEN - skb->len;
  657. /* skb_headroom() returns unsigned int... */
  658. needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0);
  659. needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0);
  660. if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb)))
  661. /* No reallocation needed, yay! */
  662. return 0;
  663. return pskb_expand_head(skb, needed_headroom, needed_tailroom,
  664. GFP_ATOMIC);
  665. }
  666. static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
  667. {
  668. struct dsa_slave_priv *p = netdev_priv(dev);
  669. struct sk_buff *nskb;
  670. dev_sw_netstats_tx_add(dev, 1, skb->len);
  671. memset(skb->cb, 0, sizeof(skb->cb));
  672. /* Handle tx timestamp if any */
  673. dsa_skb_tx_timestamp(p, skb);
  674. if (dsa_realloc_skb(skb, dev)) {
  675. dev_kfree_skb_any(skb);
  676. return NETDEV_TX_OK;
  677. }
  678. /* needed_tailroom should still be 'warm' in the cache line from
  679. * dsa_realloc_skb(), which has also ensured that padding is safe.
  680. */
  681. if (dev->needed_tailroom)
  682. eth_skb_pad(skb);
  683. /* Transmit function may have to reallocate the original SKB,
  684. * in which case it must have freed it. Only free it here on error.
  685. */
  686. nskb = p->xmit(skb, dev);
  687. if (!nskb) {
  688. kfree_skb(skb);
  689. return NETDEV_TX_OK;
  690. }
  691. return dsa_enqueue_skb(nskb, dev);
  692. }
  693. /* ethtool operations *******************************************************/
  694. static void dsa_slave_get_drvinfo(struct net_device *dev,
  695. struct ethtool_drvinfo *drvinfo)
  696. {
  697. strscpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
  698. strscpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
  699. strscpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
  700. }
  701. static int dsa_slave_get_regs_len(struct net_device *dev)
  702. {
  703. struct dsa_port *dp = dsa_slave_to_port(dev);
  704. struct dsa_switch *ds = dp->ds;
  705. if (ds->ops->get_regs_len)
  706. return ds->ops->get_regs_len(ds, dp->index);
  707. return -EOPNOTSUPP;
  708. }
  709. static void
  710. dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
  711. {
  712. struct dsa_port *dp = dsa_slave_to_port(dev);
  713. struct dsa_switch *ds = dp->ds;
  714. if (ds->ops->get_regs)
  715. ds->ops->get_regs(ds, dp->index, regs, _p);
  716. }
  717. static int dsa_slave_nway_reset(struct net_device *dev)
  718. {
  719. struct dsa_port *dp = dsa_slave_to_port(dev);
  720. return phylink_ethtool_nway_reset(dp->pl);
  721. }
  722. static int dsa_slave_get_eeprom_len(struct net_device *dev)
  723. {
  724. struct dsa_port *dp = dsa_slave_to_port(dev);
  725. struct dsa_switch *ds = dp->ds;
  726. if (ds->cd && ds->cd->eeprom_len)
  727. return ds->cd->eeprom_len;
  728. if (ds->ops->get_eeprom_len)
  729. return ds->ops->get_eeprom_len(ds);
  730. return 0;
  731. }
  732. static int dsa_slave_get_eeprom(struct net_device *dev,
  733. struct ethtool_eeprom *eeprom, u8 *data)
  734. {
  735. struct dsa_port *dp = dsa_slave_to_port(dev);
  736. struct dsa_switch *ds = dp->ds;
  737. if (ds->ops->get_eeprom)
  738. return ds->ops->get_eeprom(ds, eeprom, data);
  739. return -EOPNOTSUPP;
  740. }
  741. static int dsa_slave_set_eeprom(struct net_device *dev,
  742. struct ethtool_eeprom *eeprom, u8 *data)
  743. {
  744. struct dsa_port *dp = dsa_slave_to_port(dev);
  745. struct dsa_switch *ds = dp->ds;
  746. if (ds->ops->set_eeprom)
  747. return ds->ops->set_eeprom(ds, eeprom, data);
  748. return -EOPNOTSUPP;
  749. }
  750. static void dsa_slave_get_strings(struct net_device *dev,
  751. uint32_t stringset, uint8_t *data)
  752. {
  753. struct dsa_port *dp = dsa_slave_to_port(dev);
  754. struct dsa_switch *ds = dp->ds;
  755. if (stringset == ETH_SS_STATS) {
  756. int len = ETH_GSTRING_LEN;
  757. strncpy(data, "tx_packets", len);
  758. strncpy(data + len, "tx_bytes", len);
  759. strncpy(data + 2 * len, "rx_packets", len);
  760. strncpy(data + 3 * len, "rx_bytes", len);
  761. if (ds->ops->get_strings)
  762. ds->ops->get_strings(ds, dp->index, stringset,
  763. data + 4 * len);
  764. } else if (stringset == ETH_SS_TEST) {
  765. net_selftest_get_strings(data);
  766. }
  767. }
  768. static void dsa_slave_get_ethtool_stats(struct net_device *dev,
  769. struct ethtool_stats *stats,
  770. uint64_t *data)
  771. {
  772. struct dsa_port *dp = dsa_slave_to_port(dev);
  773. struct dsa_switch *ds = dp->ds;
  774. struct pcpu_sw_netstats *s;
  775. unsigned int start;
  776. int i;
  777. for_each_possible_cpu(i) {
  778. u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
  779. s = per_cpu_ptr(dev->tstats, i);
  780. do {
  781. start = u64_stats_fetch_begin_irq(&s->syncp);
  782. tx_packets = u64_stats_read(&s->tx_packets);
  783. tx_bytes = u64_stats_read(&s->tx_bytes);
  784. rx_packets = u64_stats_read(&s->rx_packets);
  785. rx_bytes = u64_stats_read(&s->rx_bytes);
  786. } while (u64_stats_fetch_retry_irq(&s->syncp, start));
  787. data[0] += tx_packets;
  788. data[1] += tx_bytes;
  789. data[2] += rx_packets;
  790. data[3] += rx_bytes;
  791. }
  792. if (ds->ops->get_ethtool_stats)
  793. ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
  794. }
  795. static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
  796. {
  797. struct dsa_port *dp = dsa_slave_to_port(dev);
  798. struct dsa_switch *ds = dp->ds;
  799. if (sset == ETH_SS_STATS) {
  800. int count = 0;
  801. if (ds->ops->get_sset_count) {
  802. count = ds->ops->get_sset_count(ds, dp->index, sset);
  803. if (count < 0)
  804. return count;
  805. }
  806. return count + 4;
  807. } else if (sset == ETH_SS_TEST) {
  808. return net_selftest_get_count();
  809. }
  810. return -EOPNOTSUPP;
  811. }
  812. static void dsa_slave_get_eth_phy_stats(struct net_device *dev,
  813. struct ethtool_eth_phy_stats *phy_stats)
  814. {
  815. struct dsa_port *dp = dsa_slave_to_port(dev);
  816. struct dsa_switch *ds = dp->ds;
  817. if (ds->ops->get_eth_phy_stats)
  818. ds->ops->get_eth_phy_stats(ds, dp->index, phy_stats);
  819. }
  820. static void dsa_slave_get_eth_mac_stats(struct net_device *dev,
  821. struct ethtool_eth_mac_stats *mac_stats)
  822. {
  823. struct dsa_port *dp = dsa_slave_to_port(dev);
  824. struct dsa_switch *ds = dp->ds;
  825. if (ds->ops->get_eth_mac_stats)
  826. ds->ops->get_eth_mac_stats(ds, dp->index, mac_stats);
  827. }
  828. static void
  829. dsa_slave_get_eth_ctrl_stats(struct net_device *dev,
  830. struct ethtool_eth_ctrl_stats *ctrl_stats)
  831. {
  832. struct dsa_port *dp = dsa_slave_to_port(dev);
  833. struct dsa_switch *ds = dp->ds;
  834. if (ds->ops->get_eth_ctrl_stats)
  835. ds->ops->get_eth_ctrl_stats(ds, dp->index, ctrl_stats);
  836. }
  837. static void
  838. dsa_slave_get_rmon_stats(struct net_device *dev,
  839. struct ethtool_rmon_stats *rmon_stats,
  840. const struct ethtool_rmon_hist_range **ranges)
  841. {
  842. struct dsa_port *dp = dsa_slave_to_port(dev);
  843. struct dsa_switch *ds = dp->ds;
  844. if (ds->ops->get_rmon_stats)
  845. ds->ops->get_rmon_stats(ds, dp->index, rmon_stats, ranges);
  846. }
  847. static void dsa_slave_net_selftest(struct net_device *ndev,
  848. struct ethtool_test *etest, u64 *buf)
  849. {
  850. struct dsa_port *dp = dsa_slave_to_port(ndev);
  851. struct dsa_switch *ds = dp->ds;
  852. if (ds->ops->self_test) {
  853. ds->ops->self_test(ds, dp->index, etest, buf);
  854. return;
  855. }
  856. net_selftest(ndev, etest, buf);
  857. }
  858. static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
  859. {
  860. struct dsa_port *dp = dsa_slave_to_port(dev);
  861. struct dsa_switch *ds = dp->ds;
  862. phylink_ethtool_get_wol(dp->pl, w);
  863. if (ds->ops->get_wol)
  864. ds->ops->get_wol(ds, dp->index, w);
  865. }
  866. static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
  867. {
  868. struct dsa_port *dp = dsa_slave_to_port(dev);
  869. struct dsa_switch *ds = dp->ds;
  870. int ret = -EOPNOTSUPP;
  871. phylink_ethtool_set_wol(dp->pl, w);
  872. if (ds->ops->set_wol)
  873. ret = ds->ops->set_wol(ds, dp->index, w);
  874. return ret;
  875. }
  876. static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
  877. {
  878. struct dsa_port *dp = dsa_slave_to_port(dev);
  879. struct dsa_switch *ds = dp->ds;
  880. int ret;
  881. /* Port's PHY and MAC both need to be EEE capable */
  882. if (!dev->phydev || !dp->pl)
  883. return -ENODEV;
  884. if (!ds->ops->set_mac_eee)
  885. return -EOPNOTSUPP;
  886. ret = ds->ops->set_mac_eee(ds, dp->index, e);
  887. if (ret)
  888. return ret;
  889. return phylink_ethtool_set_eee(dp->pl, e);
  890. }
  891. static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
  892. {
  893. struct dsa_port *dp = dsa_slave_to_port(dev);
  894. struct dsa_switch *ds = dp->ds;
  895. int ret;
  896. /* Port's PHY and MAC both need to be EEE capable */
  897. if (!dev->phydev || !dp->pl)
  898. return -ENODEV;
  899. if (!ds->ops->get_mac_eee)
  900. return -EOPNOTSUPP;
  901. ret = ds->ops->get_mac_eee(ds, dp->index, e);
  902. if (ret)
  903. return ret;
  904. return phylink_ethtool_get_eee(dp->pl, e);
  905. }
  906. static int dsa_slave_get_link_ksettings(struct net_device *dev,
  907. struct ethtool_link_ksettings *cmd)
  908. {
  909. struct dsa_port *dp = dsa_slave_to_port(dev);
  910. return phylink_ethtool_ksettings_get(dp->pl, cmd);
  911. }
  912. static int dsa_slave_set_link_ksettings(struct net_device *dev,
  913. const struct ethtool_link_ksettings *cmd)
  914. {
  915. struct dsa_port *dp = dsa_slave_to_port(dev);
  916. return phylink_ethtool_ksettings_set(dp->pl, cmd);
  917. }
  918. static void dsa_slave_get_pause_stats(struct net_device *dev,
  919. struct ethtool_pause_stats *pause_stats)
  920. {
  921. struct dsa_port *dp = dsa_slave_to_port(dev);
  922. struct dsa_switch *ds = dp->ds;
  923. if (ds->ops->get_pause_stats)
  924. ds->ops->get_pause_stats(ds, dp->index, pause_stats);
  925. }
  926. static void dsa_slave_get_pauseparam(struct net_device *dev,
  927. struct ethtool_pauseparam *pause)
  928. {
  929. struct dsa_port *dp = dsa_slave_to_port(dev);
  930. phylink_ethtool_get_pauseparam(dp->pl, pause);
  931. }
  932. static int dsa_slave_set_pauseparam(struct net_device *dev,
  933. struct ethtool_pauseparam *pause)
  934. {
  935. struct dsa_port *dp = dsa_slave_to_port(dev);
  936. return phylink_ethtool_set_pauseparam(dp->pl, pause);
  937. }
  938. #ifdef CONFIG_NET_POLL_CONTROLLER
  939. static int dsa_slave_netpoll_setup(struct net_device *dev,
  940. struct netpoll_info *ni)
  941. {
  942. struct net_device *master = dsa_slave_to_master(dev);
  943. struct dsa_slave_priv *p = netdev_priv(dev);
  944. struct netpoll *netpoll;
  945. int err = 0;
  946. netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
  947. if (!netpoll)
  948. return -ENOMEM;
  949. err = __netpoll_setup(netpoll, master);
  950. if (err) {
  951. kfree(netpoll);
  952. goto out;
  953. }
  954. p->netpoll = netpoll;
  955. out:
  956. return err;
  957. }
  958. static void dsa_slave_netpoll_cleanup(struct net_device *dev)
  959. {
  960. struct dsa_slave_priv *p = netdev_priv(dev);
  961. struct netpoll *netpoll = p->netpoll;
  962. if (!netpoll)
  963. return;
  964. p->netpoll = NULL;
  965. __netpoll_free(netpoll);
  966. }
  967. static void dsa_slave_poll_controller(struct net_device *dev)
  968. {
  969. }
  970. #endif
  971. static struct dsa_mall_tc_entry *
  972. dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
  973. {
  974. struct dsa_slave_priv *p = netdev_priv(dev);
  975. struct dsa_mall_tc_entry *mall_tc_entry;
  976. list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
  977. if (mall_tc_entry->cookie == cookie)
  978. return mall_tc_entry;
  979. return NULL;
  980. }
  981. static int
  982. dsa_slave_add_cls_matchall_mirred(struct net_device *dev,
  983. struct tc_cls_matchall_offload *cls,
  984. bool ingress)
  985. {
  986. struct netlink_ext_ack *extack = cls->common.extack;
  987. struct dsa_port *dp = dsa_slave_to_port(dev);
  988. struct dsa_slave_priv *p = netdev_priv(dev);
  989. struct dsa_mall_mirror_tc_entry *mirror;
  990. struct dsa_mall_tc_entry *mall_tc_entry;
  991. struct dsa_switch *ds = dp->ds;
  992. struct flow_action_entry *act;
  993. struct dsa_port *to_dp;
  994. int err;
  995. if (!ds->ops->port_mirror_add)
  996. return -EOPNOTSUPP;
  997. if (!flow_action_basic_hw_stats_check(&cls->rule->action,
  998. cls->common.extack))
  999. return -EOPNOTSUPP;
  1000. act = &cls->rule->action.entries[0];
  1001. if (!act->dev)
  1002. return -EINVAL;
  1003. if (!dsa_slave_dev_check(act->dev))
  1004. return -EOPNOTSUPP;
  1005. mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
  1006. if (!mall_tc_entry)
  1007. return -ENOMEM;
  1008. mall_tc_entry->cookie = cls->cookie;
  1009. mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
  1010. mirror = &mall_tc_entry->mirror;
  1011. to_dp = dsa_slave_to_port(act->dev);
  1012. mirror->to_local_port = to_dp->index;
  1013. mirror->ingress = ingress;
  1014. err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress, extack);
  1015. if (err) {
  1016. kfree(mall_tc_entry);
  1017. return err;
  1018. }
  1019. list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
  1020. return err;
  1021. }
  1022. static int
  1023. dsa_slave_add_cls_matchall_police(struct net_device *dev,
  1024. struct tc_cls_matchall_offload *cls,
  1025. bool ingress)
  1026. {
  1027. struct netlink_ext_ack *extack = cls->common.extack;
  1028. struct dsa_port *dp = dsa_slave_to_port(dev);
  1029. struct dsa_slave_priv *p = netdev_priv(dev);
  1030. struct dsa_mall_policer_tc_entry *policer;
  1031. struct dsa_mall_tc_entry *mall_tc_entry;
  1032. struct dsa_switch *ds = dp->ds;
  1033. struct flow_action_entry *act;
  1034. int err;
  1035. if (!ds->ops->port_policer_add) {
  1036. NL_SET_ERR_MSG_MOD(extack,
  1037. "Policing offload not implemented");
  1038. return -EOPNOTSUPP;
  1039. }
  1040. if (!ingress) {
  1041. NL_SET_ERR_MSG_MOD(extack,
  1042. "Only supported on ingress qdisc");
  1043. return -EOPNOTSUPP;
  1044. }
  1045. if (!flow_action_basic_hw_stats_check(&cls->rule->action,
  1046. cls->common.extack))
  1047. return -EOPNOTSUPP;
  1048. list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) {
  1049. if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) {
  1050. NL_SET_ERR_MSG_MOD(extack,
  1051. "Only one port policer allowed");
  1052. return -EEXIST;
  1053. }
  1054. }
  1055. act = &cls->rule->action.entries[0];
  1056. mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
  1057. if (!mall_tc_entry)
  1058. return -ENOMEM;
  1059. mall_tc_entry->cookie = cls->cookie;
  1060. mall_tc_entry->type = DSA_PORT_MALL_POLICER;
  1061. policer = &mall_tc_entry->policer;
  1062. policer->rate_bytes_per_sec = act->police.rate_bytes_ps;
  1063. policer->burst = act->police.burst;
  1064. err = ds->ops->port_policer_add(ds, dp->index, policer);
  1065. if (err) {
  1066. kfree(mall_tc_entry);
  1067. return err;
  1068. }
  1069. list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
  1070. return err;
  1071. }
  1072. static int dsa_slave_add_cls_matchall(struct net_device *dev,
  1073. struct tc_cls_matchall_offload *cls,
  1074. bool ingress)
  1075. {
  1076. int err = -EOPNOTSUPP;
  1077. if (cls->common.protocol == htons(ETH_P_ALL) &&
  1078. flow_offload_has_one_action(&cls->rule->action) &&
  1079. cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED)
  1080. err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress);
  1081. else if (flow_offload_has_one_action(&cls->rule->action) &&
  1082. cls->rule->action.entries[0].id == FLOW_ACTION_POLICE)
  1083. err = dsa_slave_add_cls_matchall_police(dev, cls, ingress);
  1084. return err;
  1085. }
  1086. static void dsa_slave_del_cls_matchall(struct net_device *dev,
  1087. struct tc_cls_matchall_offload *cls)
  1088. {
  1089. struct dsa_port *dp = dsa_slave_to_port(dev);
  1090. struct dsa_mall_tc_entry *mall_tc_entry;
  1091. struct dsa_switch *ds = dp->ds;
  1092. mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
  1093. if (!mall_tc_entry)
  1094. return;
  1095. list_del(&mall_tc_entry->list);
  1096. switch (mall_tc_entry->type) {
  1097. case DSA_PORT_MALL_MIRROR:
  1098. if (ds->ops->port_mirror_del)
  1099. ds->ops->port_mirror_del(ds, dp->index,
  1100. &mall_tc_entry->mirror);
  1101. break;
  1102. case DSA_PORT_MALL_POLICER:
  1103. if (ds->ops->port_policer_del)
  1104. ds->ops->port_policer_del(ds, dp->index);
  1105. break;
  1106. default:
  1107. WARN_ON(1);
  1108. }
  1109. kfree(mall_tc_entry);
  1110. }
  1111. static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
  1112. struct tc_cls_matchall_offload *cls,
  1113. bool ingress)
  1114. {
  1115. if (cls->common.chain_index)
  1116. return -EOPNOTSUPP;
  1117. switch (cls->command) {
  1118. case TC_CLSMATCHALL_REPLACE:
  1119. return dsa_slave_add_cls_matchall(dev, cls, ingress);
  1120. case TC_CLSMATCHALL_DESTROY:
  1121. dsa_slave_del_cls_matchall(dev, cls);
  1122. return 0;
  1123. default:
  1124. return -EOPNOTSUPP;
  1125. }
  1126. }
  1127. static int dsa_slave_add_cls_flower(struct net_device *dev,
  1128. struct flow_cls_offload *cls,
  1129. bool ingress)
  1130. {
  1131. struct dsa_port *dp = dsa_slave_to_port(dev);
  1132. struct dsa_switch *ds = dp->ds;
  1133. int port = dp->index;
  1134. if (!ds->ops->cls_flower_add)
  1135. return -EOPNOTSUPP;
  1136. return ds->ops->cls_flower_add(ds, port, cls, ingress);
  1137. }
  1138. static int dsa_slave_del_cls_flower(struct net_device *dev,
  1139. struct flow_cls_offload *cls,
  1140. bool ingress)
  1141. {
  1142. struct dsa_port *dp = dsa_slave_to_port(dev);
  1143. struct dsa_switch *ds = dp->ds;
  1144. int port = dp->index;
  1145. if (!ds->ops->cls_flower_del)
  1146. return -EOPNOTSUPP;
  1147. return ds->ops->cls_flower_del(ds, port, cls, ingress);
  1148. }
  1149. static int dsa_slave_stats_cls_flower(struct net_device *dev,
  1150. struct flow_cls_offload *cls,
  1151. bool ingress)
  1152. {
  1153. struct dsa_port *dp = dsa_slave_to_port(dev);
  1154. struct dsa_switch *ds = dp->ds;
  1155. int port = dp->index;
  1156. if (!ds->ops->cls_flower_stats)
  1157. return -EOPNOTSUPP;
  1158. return ds->ops->cls_flower_stats(ds, port, cls, ingress);
  1159. }
  1160. static int dsa_slave_setup_tc_cls_flower(struct net_device *dev,
  1161. struct flow_cls_offload *cls,
  1162. bool ingress)
  1163. {
  1164. switch (cls->command) {
  1165. case FLOW_CLS_REPLACE:
  1166. return dsa_slave_add_cls_flower(dev, cls, ingress);
  1167. case FLOW_CLS_DESTROY:
  1168. return dsa_slave_del_cls_flower(dev, cls, ingress);
  1169. case FLOW_CLS_STATS:
  1170. return dsa_slave_stats_cls_flower(dev, cls, ingress);
  1171. default:
  1172. return -EOPNOTSUPP;
  1173. }
  1174. }
  1175. static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
  1176. void *cb_priv, bool ingress)
  1177. {
  1178. struct net_device *dev = cb_priv;
  1179. if (!tc_can_offload(dev))
  1180. return -EOPNOTSUPP;
  1181. switch (type) {
  1182. case TC_SETUP_CLSMATCHALL:
  1183. return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
  1184. case TC_SETUP_CLSFLOWER:
  1185. return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress);
  1186. default:
  1187. return -EOPNOTSUPP;
  1188. }
  1189. }
  1190. static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
  1191. void *type_data, void *cb_priv)
  1192. {
  1193. return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
  1194. }
  1195. static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
  1196. void *type_data, void *cb_priv)
  1197. {
  1198. return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
  1199. }
  1200. static LIST_HEAD(dsa_slave_block_cb_list);
  1201. static int dsa_slave_setup_tc_block(struct net_device *dev,
  1202. struct flow_block_offload *f)
  1203. {
  1204. struct flow_block_cb *block_cb;
  1205. flow_setup_cb_t *cb;
  1206. if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
  1207. cb = dsa_slave_setup_tc_block_cb_ig;
  1208. else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
  1209. cb = dsa_slave_setup_tc_block_cb_eg;
  1210. else
  1211. return -EOPNOTSUPP;
  1212. f->driver_block_list = &dsa_slave_block_cb_list;
  1213. switch (f->command) {
  1214. case FLOW_BLOCK_BIND:
  1215. if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
  1216. return -EBUSY;
  1217. block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
  1218. if (IS_ERR(block_cb))
  1219. return PTR_ERR(block_cb);
  1220. flow_block_cb_add(block_cb, f);
  1221. list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
  1222. return 0;
  1223. case FLOW_BLOCK_UNBIND:
  1224. block_cb = flow_block_cb_lookup(f->block, cb, dev);
  1225. if (!block_cb)
  1226. return -ENOENT;
  1227. flow_block_cb_remove(block_cb, f);
  1228. list_del(&block_cb->driver_list);
  1229. return 0;
  1230. default:
  1231. return -EOPNOTSUPP;
  1232. }
  1233. }
  1234. static int dsa_slave_setup_ft_block(struct dsa_switch *ds, int port,
  1235. void *type_data)
  1236. {
  1237. struct net_device *master = dsa_port_to_master(dsa_to_port(ds, port));
  1238. if (!master->netdev_ops->ndo_setup_tc)
  1239. return -EOPNOTSUPP;
  1240. return master->netdev_ops->ndo_setup_tc(master, TC_SETUP_FT, type_data);
  1241. }
  1242. static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
  1243. void *type_data)
  1244. {
  1245. struct dsa_port *dp = dsa_slave_to_port(dev);
  1246. struct dsa_switch *ds = dp->ds;
  1247. switch (type) {
  1248. case TC_SETUP_BLOCK:
  1249. return dsa_slave_setup_tc_block(dev, type_data);
  1250. case TC_SETUP_FT:
  1251. return dsa_slave_setup_ft_block(ds, dp->index, type_data);
  1252. default:
  1253. break;
  1254. }
  1255. if (!ds->ops->port_setup_tc)
  1256. return -EOPNOTSUPP;
  1257. return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
  1258. }
  1259. static int dsa_slave_get_rxnfc(struct net_device *dev,
  1260. struct ethtool_rxnfc *nfc, u32 *rule_locs)
  1261. {
  1262. struct dsa_port *dp = dsa_slave_to_port(dev);
  1263. struct dsa_switch *ds = dp->ds;
  1264. if (!ds->ops->get_rxnfc)
  1265. return -EOPNOTSUPP;
  1266. return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
  1267. }
  1268. static int dsa_slave_set_rxnfc(struct net_device *dev,
  1269. struct ethtool_rxnfc *nfc)
  1270. {
  1271. struct dsa_port *dp = dsa_slave_to_port(dev);
  1272. struct dsa_switch *ds = dp->ds;
  1273. if (!ds->ops->set_rxnfc)
  1274. return -EOPNOTSUPP;
  1275. return ds->ops->set_rxnfc(ds, dp->index, nfc);
  1276. }
  1277. static int dsa_slave_get_ts_info(struct net_device *dev,
  1278. struct ethtool_ts_info *ts)
  1279. {
  1280. struct dsa_slave_priv *p = netdev_priv(dev);
  1281. struct dsa_switch *ds = p->dp->ds;
  1282. if (!ds->ops->get_ts_info)
  1283. return -EOPNOTSUPP;
  1284. return ds->ops->get_ts_info(ds, p->dp->index, ts);
  1285. }
  1286. static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
  1287. u16 vid)
  1288. {
  1289. struct dsa_port *dp = dsa_slave_to_port(dev);
  1290. struct switchdev_obj_port_vlan vlan = {
  1291. .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
  1292. .vid = vid,
  1293. /* This API only allows programming tagged, non-PVID VIDs */
  1294. .flags = 0,
  1295. };
  1296. struct netlink_ext_ack extack = {0};
  1297. int ret;
  1298. /* User port... */
  1299. ret = dsa_port_vlan_add(dp, &vlan, &extack);
  1300. if (ret) {
  1301. if (extack._msg)
  1302. netdev_err(dev, "%s\n", extack._msg);
  1303. return ret;
  1304. }
  1305. /* And CPU port... */
  1306. ret = dsa_port_host_vlan_add(dp, &vlan, &extack);
  1307. if (ret) {
  1308. if (extack._msg)
  1309. netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index,
  1310. extack._msg);
  1311. return ret;
  1312. }
  1313. return 0;
  1314. }
  1315. static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
  1316. u16 vid)
  1317. {
  1318. struct dsa_port *dp = dsa_slave_to_port(dev);
  1319. struct switchdev_obj_port_vlan vlan = {
  1320. .vid = vid,
  1321. /* This API only allows programming tagged, non-PVID VIDs */
  1322. .flags = 0,
  1323. };
  1324. int err;
  1325. err = dsa_port_vlan_del(dp, &vlan);
  1326. if (err)
  1327. return err;
  1328. return dsa_port_host_vlan_del(dp, &vlan);
  1329. }
  1330. static int dsa_slave_restore_vlan(struct net_device *vdev, int vid, void *arg)
  1331. {
  1332. __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q);
  1333. return dsa_slave_vlan_rx_add_vid(arg, proto, vid);
  1334. }
  1335. static int dsa_slave_clear_vlan(struct net_device *vdev, int vid, void *arg)
  1336. {
  1337. __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q);
  1338. return dsa_slave_vlan_rx_kill_vid(arg, proto, vid);
  1339. }
  1340. /* Keep the VLAN RX filtering list in sync with the hardware only if VLAN
  1341. * filtering is enabled. The baseline is that only ports that offload a
  1342. * VLAN-aware bridge are VLAN-aware, and standalone ports are VLAN-unaware,
  1343. * but there are exceptions for quirky hardware.
  1344. *
  1345. * If ds->vlan_filtering_is_global = true, then standalone ports which share
  1346. * the same switch with other ports that offload a VLAN-aware bridge are also
  1347. * inevitably VLAN-aware.
  1348. *
  1349. * To summarize, a DSA switch port offloads:
  1350. *
  1351. * - If standalone (this includes software bridge, software LAG):
  1352. * - if ds->needs_standalone_vlan_filtering = true, OR if
  1353. * (ds->vlan_filtering_is_global = true AND there are bridges spanning
  1354. * this switch chip which have vlan_filtering=1)
  1355. * - the 8021q upper VLANs
  1356. * - else (standalone VLAN filtering is not needed, VLAN filtering is not
  1357. * global, or it is, but no port is under a VLAN-aware bridge):
  1358. * - no VLAN (any 8021q upper is a software VLAN)
  1359. *
  1360. * - If under a vlan_filtering=0 bridge which it offload:
  1361. * - if ds->configure_vlan_while_not_filtering = true (default):
  1362. * - the bridge VLANs. These VLANs are committed to hardware but inactive.
  1363. * - else (deprecated):
  1364. * - no VLAN. The bridge VLANs are not restored when VLAN awareness is
  1365. * enabled, so this behavior is broken and discouraged.
  1366. *
  1367. * - If under a vlan_filtering=1 bridge which it offload:
  1368. * - the bridge VLANs
  1369. * - the 8021q upper VLANs
  1370. */
  1371. int dsa_slave_manage_vlan_filtering(struct net_device *slave,
  1372. bool vlan_filtering)
  1373. {
  1374. int err;
  1375. if (vlan_filtering) {
  1376. slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
  1377. err = vlan_for_each(slave, dsa_slave_restore_vlan, slave);
  1378. if (err) {
  1379. vlan_for_each(slave, dsa_slave_clear_vlan, slave);
  1380. slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
  1381. return err;
  1382. }
  1383. } else {
  1384. err = vlan_for_each(slave, dsa_slave_clear_vlan, slave);
  1385. if (err)
  1386. return err;
  1387. slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
  1388. }
  1389. return 0;
  1390. }
  1391. struct dsa_hw_port {
  1392. struct list_head list;
  1393. struct net_device *dev;
  1394. int old_mtu;
  1395. };
  1396. static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu)
  1397. {
  1398. const struct dsa_hw_port *p;
  1399. int err;
  1400. list_for_each_entry(p, hw_port_list, list) {
  1401. if (p->dev->mtu == mtu)
  1402. continue;
  1403. err = dev_set_mtu(p->dev, mtu);
  1404. if (err)
  1405. goto rollback;
  1406. }
  1407. return 0;
  1408. rollback:
  1409. list_for_each_entry_continue_reverse(p, hw_port_list, list) {
  1410. if (p->dev->mtu == p->old_mtu)
  1411. continue;
  1412. if (dev_set_mtu(p->dev, p->old_mtu))
  1413. netdev_err(p->dev, "Failed to restore MTU\n");
  1414. }
  1415. return err;
  1416. }
  1417. static void dsa_hw_port_list_free(struct list_head *hw_port_list)
  1418. {
  1419. struct dsa_hw_port *p, *n;
  1420. list_for_each_entry_safe(p, n, hw_port_list, list)
  1421. kfree(p);
  1422. }
  1423. /* Make the hardware datapath to/from @dev limited to a common MTU */
  1424. static void dsa_bridge_mtu_normalization(struct dsa_port *dp)
  1425. {
  1426. struct list_head hw_port_list;
  1427. struct dsa_switch_tree *dst;
  1428. int min_mtu = ETH_MAX_MTU;
  1429. struct dsa_port *other_dp;
  1430. int err;
  1431. if (!dp->ds->mtu_enforcement_ingress)
  1432. return;
  1433. if (!dp->bridge)
  1434. return;
  1435. INIT_LIST_HEAD(&hw_port_list);
  1436. /* Populate the list of ports that are part of the same bridge
  1437. * as the newly added/modified port
  1438. */
  1439. list_for_each_entry(dst, &dsa_tree_list, list) {
  1440. list_for_each_entry(other_dp, &dst->ports, list) {
  1441. struct dsa_hw_port *hw_port;
  1442. struct net_device *slave;
  1443. if (other_dp->type != DSA_PORT_TYPE_USER)
  1444. continue;
  1445. if (!dsa_port_bridge_same(dp, other_dp))
  1446. continue;
  1447. if (!other_dp->ds->mtu_enforcement_ingress)
  1448. continue;
  1449. slave = other_dp->slave;
  1450. if (min_mtu > slave->mtu)
  1451. min_mtu = slave->mtu;
  1452. hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL);
  1453. if (!hw_port)
  1454. goto out;
  1455. hw_port->dev = slave;
  1456. hw_port->old_mtu = slave->mtu;
  1457. list_add(&hw_port->list, &hw_port_list);
  1458. }
  1459. }
  1460. /* Attempt to configure the entire hardware bridge to the newly added
  1461. * interface's MTU first, regardless of whether the intention of the
  1462. * user was to raise or lower it.
  1463. */
  1464. err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu);
  1465. if (!err)
  1466. goto out;
  1467. /* Clearly that didn't work out so well, so just set the minimum MTU on
  1468. * all hardware bridge ports now. If this fails too, then all ports will
  1469. * still have their old MTU rolled back anyway.
  1470. */
  1471. dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu);
  1472. out:
  1473. dsa_hw_port_list_free(&hw_port_list);
  1474. }
  1475. int dsa_slave_change_mtu(struct net_device *dev, int new_mtu)
  1476. {
  1477. struct net_device *master = dsa_slave_to_master(dev);
  1478. struct dsa_port *dp = dsa_slave_to_port(dev);
  1479. struct dsa_port *cpu_dp = dp->cpu_dp;
  1480. struct dsa_switch *ds = dp->ds;
  1481. struct dsa_port *other_dp;
  1482. int largest_mtu = 0;
  1483. int new_master_mtu;
  1484. int old_master_mtu;
  1485. int mtu_limit;
  1486. int overhead;
  1487. int cpu_mtu;
  1488. int err;
  1489. if (!ds->ops->port_change_mtu)
  1490. return -EOPNOTSUPP;
  1491. dsa_tree_for_each_user_port(other_dp, ds->dst) {
  1492. int slave_mtu;
  1493. /* During probe, this function will be called for each slave
  1494. * device, while not all of them have been allocated. That's
  1495. * ok, it doesn't change what the maximum is, so ignore it.
  1496. */
  1497. if (!other_dp->slave)
  1498. continue;
  1499. /* Pretend that we already applied the setting, which we
  1500. * actually haven't (still haven't done all integrity checks)
  1501. */
  1502. if (dp == other_dp)
  1503. slave_mtu = new_mtu;
  1504. else
  1505. slave_mtu = other_dp->slave->mtu;
  1506. if (largest_mtu < slave_mtu)
  1507. largest_mtu = slave_mtu;
  1508. }
  1509. overhead = dsa_tag_protocol_overhead(cpu_dp->tag_ops);
  1510. mtu_limit = min_t(int, master->max_mtu, dev->max_mtu + overhead);
  1511. old_master_mtu = master->mtu;
  1512. new_master_mtu = largest_mtu + overhead;
  1513. if (new_master_mtu > mtu_limit)
  1514. return -ERANGE;
  1515. /* If the master MTU isn't over limit, there's no need to check the CPU
  1516. * MTU, since that surely isn't either.
  1517. */
  1518. cpu_mtu = largest_mtu;
  1519. /* Start applying stuff */
  1520. if (new_master_mtu != old_master_mtu) {
  1521. err = dev_set_mtu(master, new_master_mtu);
  1522. if (err < 0)
  1523. goto out_master_failed;
  1524. /* We only need to propagate the MTU of the CPU port to
  1525. * upstream switches, so emit a notifier which updates them.
  1526. */
  1527. err = dsa_port_mtu_change(cpu_dp, cpu_mtu);
  1528. if (err)
  1529. goto out_cpu_failed;
  1530. }
  1531. err = ds->ops->port_change_mtu(ds, dp->index, new_mtu);
  1532. if (err)
  1533. goto out_port_failed;
  1534. dev->mtu = new_mtu;
  1535. dsa_bridge_mtu_normalization(dp);
  1536. return 0;
  1537. out_port_failed:
  1538. if (new_master_mtu != old_master_mtu)
  1539. dsa_port_mtu_change(cpu_dp, old_master_mtu - overhead);
  1540. out_cpu_failed:
  1541. if (new_master_mtu != old_master_mtu)
  1542. dev_set_mtu(master, old_master_mtu);
  1543. out_master_failed:
  1544. return err;
  1545. }
  1546. static int __maybe_unused
  1547. dsa_slave_dcbnl_set_default_prio(struct net_device *dev, struct dcb_app *app)
  1548. {
  1549. struct dsa_port *dp = dsa_slave_to_port(dev);
  1550. struct dsa_switch *ds = dp->ds;
  1551. unsigned long mask, new_prio;
  1552. int err, port = dp->index;
  1553. if (!ds->ops->port_set_default_prio)
  1554. return -EOPNOTSUPP;
  1555. err = dcb_ieee_setapp(dev, app);
  1556. if (err)
  1557. return err;
  1558. mask = dcb_ieee_getapp_mask(dev, app);
  1559. new_prio = __fls(mask);
  1560. err = ds->ops->port_set_default_prio(ds, port, new_prio);
  1561. if (err) {
  1562. dcb_ieee_delapp(dev, app);
  1563. return err;
  1564. }
  1565. return 0;
  1566. }
  1567. static int __maybe_unused
  1568. dsa_slave_dcbnl_add_dscp_prio(struct net_device *dev, struct dcb_app *app)
  1569. {
  1570. struct dsa_port *dp = dsa_slave_to_port(dev);
  1571. struct dsa_switch *ds = dp->ds;
  1572. unsigned long mask, new_prio;
  1573. int err, port = dp->index;
  1574. u8 dscp = app->protocol;
  1575. if (!ds->ops->port_add_dscp_prio)
  1576. return -EOPNOTSUPP;
  1577. if (dscp >= 64) {
  1578. netdev_err(dev, "DSCP APP entry with protocol value %u is invalid\n",
  1579. dscp);
  1580. return -EINVAL;
  1581. }
  1582. err = dcb_ieee_setapp(dev, app);
  1583. if (err)
  1584. return err;
  1585. mask = dcb_ieee_getapp_mask(dev, app);
  1586. new_prio = __fls(mask);
  1587. err = ds->ops->port_add_dscp_prio(ds, port, dscp, new_prio);
  1588. if (err) {
  1589. dcb_ieee_delapp(dev, app);
  1590. return err;
  1591. }
  1592. return 0;
  1593. }
  1594. static int __maybe_unused dsa_slave_dcbnl_ieee_setapp(struct net_device *dev,
  1595. struct dcb_app *app)
  1596. {
  1597. switch (app->selector) {
  1598. case IEEE_8021QAZ_APP_SEL_ETHERTYPE:
  1599. switch (app->protocol) {
  1600. case 0:
  1601. return dsa_slave_dcbnl_set_default_prio(dev, app);
  1602. default:
  1603. return -EOPNOTSUPP;
  1604. }
  1605. break;
  1606. case IEEE_8021QAZ_APP_SEL_DSCP:
  1607. return dsa_slave_dcbnl_add_dscp_prio(dev, app);
  1608. default:
  1609. return -EOPNOTSUPP;
  1610. }
  1611. }
  1612. static int __maybe_unused
  1613. dsa_slave_dcbnl_del_default_prio(struct net_device *dev, struct dcb_app *app)
  1614. {
  1615. struct dsa_port *dp = dsa_slave_to_port(dev);
  1616. struct dsa_switch *ds = dp->ds;
  1617. unsigned long mask, new_prio;
  1618. int err, port = dp->index;
  1619. if (!ds->ops->port_set_default_prio)
  1620. return -EOPNOTSUPP;
  1621. err = dcb_ieee_delapp(dev, app);
  1622. if (err)
  1623. return err;
  1624. mask = dcb_ieee_getapp_mask(dev, app);
  1625. new_prio = mask ? __fls(mask) : 0;
  1626. err = ds->ops->port_set_default_prio(ds, port, new_prio);
  1627. if (err) {
  1628. dcb_ieee_setapp(dev, app);
  1629. return err;
  1630. }
  1631. return 0;
  1632. }
  1633. static int __maybe_unused
  1634. dsa_slave_dcbnl_del_dscp_prio(struct net_device *dev, struct dcb_app *app)
  1635. {
  1636. struct dsa_port *dp = dsa_slave_to_port(dev);
  1637. struct dsa_switch *ds = dp->ds;
  1638. int err, port = dp->index;
  1639. u8 dscp = app->protocol;
  1640. if (!ds->ops->port_del_dscp_prio)
  1641. return -EOPNOTSUPP;
  1642. err = dcb_ieee_delapp(dev, app);
  1643. if (err)
  1644. return err;
  1645. err = ds->ops->port_del_dscp_prio(ds, port, dscp, app->priority);
  1646. if (err) {
  1647. dcb_ieee_setapp(dev, app);
  1648. return err;
  1649. }
  1650. return 0;
  1651. }
  1652. static int __maybe_unused dsa_slave_dcbnl_ieee_delapp(struct net_device *dev,
  1653. struct dcb_app *app)
  1654. {
  1655. switch (app->selector) {
  1656. case IEEE_8021QAZ_APP_SEL_ETHERTYPE:
  1657. switch (app->protocol) {
  1658. case 0:
  1659. return dsa_slave_dcbnl_del_default_prio(dev, app);
  1660. default:
  1661. return -EOPNOTSUPP;
  1662. }
  1663. break;
  1664. case IEEE_8021QAZ_APP_SEL_DSCP:
  1665. return dsa_slave_dcbnl_del_dscp_prio(dev, app);
  1666. default:
  1667. return -EOPNOTSUPP;
  1668. }
  1669. }
  1670. /* Pre-populate the DCB application priority table with the priorities
  1671. * configured during switch setup, which we read from hardware here.
  1672. */
  1673. static int dsa_slave_dcbnl_init(struct net_device *dev)
  1674. {
  1675. struct dsa_port *dp = dsa_slave_to_port(dev);
  1676. struct dsa_switch *ds = dp->ds;
  1677. int port = dp->index;
  1678. int err;
  1679. if (ds->ops->port_get_default_prio) {
  1680. int prio = ds->ops->port_get_default_prio(ds, port);
  1681. struct dcb_app app = {
  1682. .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE,
  1683. .protocol = 0,
  1684. .priority = prio,
  1685. };
  1686. if (prio < 0)
  1687. return prio;
  1688. err = dcb_ieee_setapp(dev, &app);
  1689. if (err)
  1690. return err;
  1691. }
  1692. if (ds->ops->port_get_dscp_prio) {
  1693. int protocol;
  1694. for (protocol = 0; protocol < 64; protocol++) {
  1695. struct dcb_app app = {
  1696. .selector = IEEE_8021QAZ_APP_SEL_DSCP,
  1697. .protocol = protocol,
  1698. };
  1699. int prio;
  1700. prio = ds->ops->port_get_dscp_prio(ds, port, protocol);
  1701. if (prio == -EOPNOTSUPP)
  1702. continue;
  1703. if (prio < 0)
  1704. return prio;
  1705. app.priority = prio;
  1706. err = dcb_ieee_setapp(dev, &app);
  1707. if (err)
  1708. return err;
  1709. }
  1710. }
  1711. return 0;
  1712. }
  1713. static const struct ethtool_ops dsa_slave_ethtool_ops = {
  1714. .get_drvinfo = dsa_slave_get_drvinfo,
  1715. .get_regs_len = dsa_slave_get_regs_len,
  1716. .get_regs = dsa_slave_get_regs,
  1717. .nway_reset = dsa_slave_nway_reset,
  1718. .get_link = ethtool_op_get_link,
  1719. .get_eeprom_len = dsa_slave_get_eeprom_len,
  1720. .get_eeprom = dsa_slave_get_eeprom,
  1721. .set_eeprom = dsa_slave_set_eeprom,
  1722. .get_strings = dsa_slave_get_strings,
  1723. .get_ethtool_stats = dsa_slave_get_ethtool_stats,
  1724. .get_sset_count = dsa_slave_get_sset_count,
  1725. .get_eth_phy_stats = dsa_slave_get_eth_phy_stats,
  1726. .get_eth_mac_stats = dsa_slave_get_eth_mac_stats,
  1727. .get_eth_ctrl_stats = dsa_slave_get_eth_ctrl_stats,
  1728. .get_rmon_stats = dsa_slave_get_rmon_stats,
  1729. .set_wol = dsa_slave_set_wol,
  1730. .get_wol = dsa_slave_get_wol,
  1731. .set_eee = dsa_slave_set_eee,
  1732. .get_eee = dsa_slave_get_eee,
  1733. .get_link_ksettings = dsa_slave_get_link_ksettings,
  1734. .set_link_ksettings = dsa_slave_set_link_ksettings,
  1735. .get_pause_stats = dsa_slave_get_pause_stats,
  1736. .get_pauseparam = dsa_slave_get_pauseparam,
  1737. .set_pauseparam = dsa_slave_set_pauseparam,
  1738. .get_rxnfc = dsa_slave_get_rxnfc,
  1739. .set_rxnfc = dsa_slave_set_rxnfc,
  1740. .get_ts_info = dsa_slave_get_ts_info,
  1741. .self_test = dsa_slave_net_selftest,
  1742. };
  1743. static const struct dcbnl_rtnl_ops __maybe_unused dsa_slave_dcbnl_ops = {
  1744. .ieee_setapp = dsa_slave_dcbnl_ieee_setapp,
  1745. .ieee_delapp = dsa_slave_dcbnl_ieee_delapp,
  1746. };
  1747. static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
  1748. {
  1749. struct dsa_port *dp = dsa_slave_to_port(dev);
  1750. return &dp->devlink_port;
  1751. }
  1752. static void dsa_slave_get_stats64(struct net_device *dev,
  1753. struct rtnl_link_stats64 *s)
  1754. {
  1755. struct dsa_port *dp = dsa_slave_to_port(dev);
  1756. struct dsa_switch *ds = dp->ds;
  1757. if (ds->ops->get_stats64)
  1758. ds->ops->get_stats64(ds, dp->index, s);
  1759. else
  1760. dev_get_tstats64(dev, s);
  1761. }
  1762. static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx,
  1763. struct net_device_path *path)
  1764. {
  1765. struct dsa_port *dp = dsa_slave_to_port(ctx->dev);
  1766. struct net_device *master = dsa_port_to_master(dp);
  1767. struct dsa_port *cpu_dp = dp->cpu_dp;
  1768. path->dev = ctx->dev;
  1769. path->type = DEV_PATH_DSA;
  1770. path->dsa.proto = cpu_dp->tag_ops->proto;
  1771. path->dsa.port = dp->index;
  1772. ctx->dev = master;
  1773. return 0;
  1774. }
  1775. static const struct net_device_ops dsa_slave_netdev_ops = {
  1776. .ndo_open = dsa_slave_open,
  1777. .ndo_stop = dsa_slave_close,
  1778. .ndo_start_xmit = dsa_slave_xmit,
  1779. .ndo_change_rx_flags = dsa_slave_change_rx_flags,
  1780. .ndo_set_rx_mode = dsa_slave_set_rx_mode,
  1781. .ndo_set_mac_address = dsa_slave_set_mac_address,
  1782. .ndo_fdb_dump = dsa_slave_fdb_dump,
  1783. .ndo_eth_ioctl = dsa_slave_ioctl,
  1784. .ndo_get_iflink = dsa_slave_get_iflink,
  1785. #ifdef CONFIG_NET_POLL_CONTROLLER
  1786. .ndo_netpoll_setup = dsa_slave_netpoll_setup,
  1787. .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
  1788. .ndo_poll_controller = dsa_slave_poll_controller,
  1789. #endif
  1790. .ndo_setup_tc = dsa_slave_setup_tc,
  1791. .ndo_get_stats64 = dsa_slave_get_stats64,
  1792. .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
  1793. .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
  1794. .ndo_get_devlink_port = dsa_slave_get_devlink_port,
  1795. .ndo_change_mtu = dsa_slave_change_mtu,
  1796. .ndo_fill_forward_path = dsa_slave_fill_forward_path,
  1797. };
  1798. static struct device_type dsa_type = {
  1799. .name = "dsa",
  1800. };
  1801. void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
  1802. {
  1803. const struct dsa_port *dp = dsa_to_port(ds, port);
  1804. if (dp->pl)
  1805. phylink_mac_change(dp->pl, up);
  1806. }
  1807. EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
  1808. static void dsa_slave_phylink_fixed_state(struct phylink_config *config,
  1809. struct phylink_link_state *state)
  1810. {
  1811. struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
  1812. struct dsa_switch *ds = dp->ds;
  1813. /* No need to check that this operation is valid, the callback would
  1814. * not be called if it was not.
  1815. */
  1816. ds->ops->phylink_fixed_state(ds, dp->index, state);
  1817. }
  1818. /* slave device setup *******************************************************/
  1819. static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr,
  1820. u32 flags)
  1821. {
  1822. struct dsa_port *dp = dsa_slave_to_port(slave_dev);
  1823. struct dsa_switch *ds = dp->ds;
  1824. slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
  1825. if (!slave_dev->phydev) {
  1826. netdev_err(slave_dev, "no phy at %d\n", addr);
  1827. return -ENODEV;
  1828. }
  1829. slave_dev->phydev->dev_flags |= flags;
  1830. return phylink_connect_phy(dp->pl, slave_dev->phydev);
  1831. }
  1832. static int dsa_slave_phy_setup(struct net_device *slave_dev)
  1833. {
  1834. struct dsa_port *dp = dsa_slave_to_port(slave_dev);
  1835. struct device_node *port_dn = dp->dn;
  1836. struct dsa_switch *ds = dp->ds;
  1837. u32 phy_flags = 0;
  1838. int ret;
  1839. dp->pl_config.dev = &slave_dev->dev;
  1840. dp->pl_config.type = PHYLINK_NETDEV;
  1841. /* The get_fixed_state callback takes precedence over polling the
  1842. * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set
  1843. * this if the switch provides such a callback.
  1844. */
  1845. if (ds->ops->phylink_fixed_state) {
  1846. dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state;
  1847. dp->pl_config.poll_fixed_state = true;
  1848. }
  1849. ret = dsa_port_phylink_create(dp);
  1850. if (ret)
  1851. return ret;
  1852. if (ds->ops->get_phy_flags)
  1853. phy_flags = ds->ops->get_phy_flags(ds, dp->index);
  1854. ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
  1855. if (ret == -ENODEV && ds->slave_mii_bus) {
  1856. /* We could not connect to a designated PHY or SFP, so try to
  1857. * use the switch internal MDIO bus instead
  1858. */
  1859. ret = dsa_slave_phy_connect(slave_dev, dp->index, phy_flags);
  1860. }
  1861. if (ret) {
  1862. netdev_err(slave_dev, "failed to connect to PHY: %pe\n",
  1863. ERR_PTR(ret));
  1864. dsa_port_phylink_destroy(dp);
  1865. }
  1866. return ret;
  1867. }
  1868. void dsa_slave_setup_tagger(struct net_device *slave)
  1869. {
  1870. struct dsa_port *dp = dsa_slave_to_port(slave);
  1871. struct net_device *master = dsa_port_to_master(dp);
  1872. struct dsa_slave_priv *p = netdev_priv(slave);
  1873. const struct dsa_port *cpu_dp = dp->cpu_dp;
  1874. const struct dsa_switch *ds = dp->ds;
  1875. slave->needed_headroom = cpu_dp->tag_ops->needed_headroom;
  1876. slave->needed_tailroom = cpu_dp->tag_ops->needed_tailroom;
  1877. /* Try to save one extra realloc later in the TX path (in the master)
  1878. * by also inheriting the master's needed headroom and tailroom.
  1879. * The 8021q driver also does this.
  1880. */
  1881. slave->needed_headroom += master->needed_headroom;
  1882. slave->needed_tailroom += master->needed_tailroom;
  1883. p->xmit = cpu_dp->tag_ops->xmit;
  1884. slave->features = master->vlan_features | NETIF_F_HW_TC;
  1885. slave->hw_features |= NETIF_F_HW_TC;
  1886. slave->features |= NETIF_F_LLTX;
  1887. if (slave->needed_tailroom)
  1888. slave->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST);
  1889. if (ds->needs_standalone_vlan_filtering)
  1890. slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
  1891. }
  1892. int dsa_slave_suspend(struct net_device *slave_dev)
  1893. {
  1894. struct dsa_port *dp = dsa_slave_to_port(slave_dev);
  1895. if (!netif_running(slave_dev))
  1896. return 0;
  1897. netif_device_detach(slave_dev);
  1898. rtnl_lock();
  1899. phylink_stop(dp->pl);
  1900. rtnl_unlock();
  1901. return 0;
  1902. }
  1903. int dsa_slave_resume(struct net_device *slave_dev)
  1904. {
  1905. struct dsa_port *dp = dsa_slave_to_port(slave_dev);
  1906. if (!netif_running(slave_dev))
  1907. return 0;
  1908. netif_device_attach(slave_dev);
  1909. rtnl_lock();
  1910. phylink_start(dp->pl);
  1911. rtnl_unlock();
  1912. return 0;
  1913. }
  1914. int dsa_slave_create(struct dsa_port *port)
  1915. {
  1916. struct net_device *master = dsa_port_to_master(port);
  1917. struct dsa_switch *ds = port->ds;
  1918. const char *name = port->name;
  1919. struct net_device *slave_dev;
  1920. struct dsa_slave_priv *p;
  1921. int ret;
  1922. if (!ds->num_tx_queues)
  1923. ds->num_tx_queues = 1;
  1924. slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
  1925. NET_NAME_UNKNOWN, ether_setup,
  1926. ds->num_tx_queues, 1);
  1927. if (slave_dev == NULL)
  1928. return -ENOMEM;
  1929. slave_dev->rtnl_link_ops = &dsa_link_ops;
  1930. slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
  1931. #if IS_ENABLED(CONFIG_DCB)
  1932. slave_dev->dcbnl_ops = &dsa_slave_dcbnl_ops;
  1933. #endif
  1934. if (!is_zero_ether_addr(port->mac))
  1935. eth_hw_addr_set(slave_dev, port->mac);
  1936. else
  1937. eth_hw_addr_inherit(slave_dev, master);
  1938. slave_dev->priv_flags |= IFF_NO_QUEUE;
  1939. if (dsa_switch_supports_uc_filtering(ds))
  1940. slave_dev->priv_flags |= IFF_UNICAST_FLT;
  1941. slave_dev->netdev_ops = &dsa_slave_netdev_ops;
  1942. if (ds->ops->port_max_mtu)
  1943. slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index);
  1944. SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
  1945. SET_NETDEV_DEV(slave_dev, port->ds->dev);
  1946. slave_dev->dev.of_node = port->dn;
  1947. slave_dev->vlan_features = master->vlan_features;
  1948. p = netdev_priv(slave_dev);
  1949. slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
  1950. if (!slave_dev->tstats) {
  1951. free_netdev(slave_dev);
  1952. return -ENOMEM;
  1953. }
  1954. ret = gro_cells_init(&p->gcells, slave_dev);
  1955. if (ret)
  1956. goto out_free;
  1957. p->dp = port;
  1958. INIT_LIST_HEAD(&p->mall_tc_list);
  1959. port->slave = slave_dev;
  1960. dsa_slave_setup_tagger(slave_dev);
  1961. netif_carrier_off(slave_dev);
  1962. ret = dsa_slave_phy_setup(slave_dev);
  1963. if (ret) {
  1964. netdev_err(slave_dev,
  1965. "error %d setting up PHY for tree %d, switch %d, port %d\n",
  1966. ret, ds->dst->index, ds->index, port->index);
  1967. goto out_gcells;
  1968. }
  1969. rtnl_lock();
  1970. ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN);
  1971. if (ret && ret != -EOPNOTSUPP)
  1972. dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n",
  1973. ret, ETH_DATA_LEN, port->index);
  1974. ret = register_netdevice(slave_dev);
  1975. if (ret) {
  1976. netdev_err(master, "error %d registering interface %s\n",
  1977. ret, slave_dev->name);
  1978. rtnl_unlock();
  1979. goto out_phy;
  1980. }
  1981. if (IS_ENABLED(CONFIG_DCB)) {
  1982. ret = dsa_slave_dcbnl_init(slave_dev);
  1983. if (ret) {
  1984. netdev_err(slave_dev,
  1985. "failed to initialize DCB: %pe\n",
  1986. ERR_PTR(ret));
  1987. rtnl_unlock();
  1988. goto out_unregister;
  1989. }
  1990. }
  1991. ret = netdev_upper_dev_link(master, slave_dev, NULL);
  1992. rtnl_unlock();
  1993. if (ret)
  1994. goto out_unregister;
  1995. return 0;
  1996. out_unregister:
  1997. unregister_netdev(slave_dev);
  1998. out_phy:
  1999. rtnl_lock();
  2000. phylink_disconnect_phy(p->dp->pl);
  2001. rtnl_unlock();
  2002. dsa_port_phylink_destroy(p->dp);
  2003. out_gcells:
  2004. gro_cells_destroy(&p->gcells);
  2005. out_free:
  2006. free_percpu(slave_dev->tstats);
  2007. free_netdev(slave_dev);
  2008. port->slave = NULL;
  2009. return ret;
  2010. }
  2011. void dsa_slave_destroy(struct net_device *slave_dev)
  2012. {
  2013. struct net_device *master = dsa_slave_to_master(slave_dev);
  2014. struct dsa_port *dp = dsa_slave_to_port(slave_dev);
  2015. struct dsa_slave_priv *p = netdev_priv(slave_dev);
  2016. netif_carrier_off(slave_dev);
  2017. rtnl_lock();
  2018. netdev_upper_dev_unlink(master, slave_dev);
  2019. unregister_netdevice(slave_dev);
  2020. phylink_disconnect_phy(dp->pl);
  2021. rtnl_unlock();
  2022. dsa_port_phylink_destroy(dp);
  2023. gro_cells_destroy(&p->gcells);
  2024. free_percpu(slave_dev->tstats);
  2025. free_netdev(slave_dev);
  2026. }
  2027. int dsa_slave_change_master(struct net_device *dev, struct net_device *master,
  2028. struct netlink_ext_ack *extack)
  2029. {
  2030. struct net_device *old_master = dsa_slave_to_master(dev);
  2031. struct dsa_port *dp = dsa_slave_to_port(dev);
  2032. struct dsa_switch *ds = dp->ds;
  2033. struct net_device *upper;
  2034. struct list_head *iter;
  2035. int err;
  2036. if (master == old_master)
  2037. return 0;
  2038. if (!ds->ops->port_change_master) {
  2039. NL_SET_ERR_MSG_MOD(extack,
  2040. "Driver does not support changing DSA master");
  2041. return -EOPNOTSUPP;
  2042. }
  2043. if (!netdev_uses_dsa(master)) {
  2044. NL_SET_ERR_MSG_MOD(extack,
  2045. "Interface not eligible as DSA master");
  2046. return -EOPNOTSUPP;
  2047. }
  2048. netdev_for_each_upper_dev_rcu(master, upper, iter) {
  2049. if (dsa_slave_dev_check(upper))
  2050. continue;
  2051. if (netif_is_bridge_master(upper))
  2052. continue;
  2053. NL_SET_ERR_MSG_MOD(extack, "Cannot join master with unknown uppers");
  2054. return -EOPNOTSUPP;
  2055. }
  2056. /* Since we allow live-changing the DSA master, plus we auto-open the
  2057. * DSA master when the user port opens => we need to ensure that the
  2058. * new DSA master is open too.
  2059. */
  2060. if (dev->flags & IFF_UP) {
  2061. err = dev_open(master, extack);
  2062. if (err)
  2063. return err;
  2064. }
  2065. netdev_upper_dev_unlink(old_master, dev);
  2066. err = netdev_upper_dev_link(master, dev, extack);
  2067. if (err)
  2068. goto out_revert_old_master_unlink;
  2069. err = dsa_port_change_master(dp, master, extack);
  2070. if (err)
  2071. goto out_revert_master_link;
  2072. /* Update the MTU of the new CPU port through cross-chip notifiers */
  2073. err = dsa_slave_change_mtu(dev, dev->mtu);
  2074. if (err && err != -EOPNOTSUPP) {
  2075. netdev_warn(dev,
  2076. "nonfatal error updating MTU with new master: %pe\n",
  2077. ERR_PTR(err));
  2078. }
  2079. /* If the port doesn't have its own MAC address and relies on the DSA
  2080. * master's one, inherit it again from the new DSA master.
  2081. */
  2082. if (is_zero_ether_addr(dp->mac))
  2083. eth_hw_addr_inherit(dev, master);
  2084. return 0;
  2085. out_revert_master_link:
  2086. netdev_upper_dev_unlink(master, dev);
  2087. out_revert_old_master_unlink:
  2088. netdev_upper_dev_link(old_master, dev, NULL);
  2089. return err;
  2090. }
  2091. bool dsa_slave_dev_check(const struct net_device *dev)
  2092. {
  2093. return dev->netdev_ops == &dsa_slave_netdev_ops;
  2094. }
  2095. EXPORT_SYMBOL_GPL(dsa_slave_dev_check);
  2096. static int dsa_slave_changeupper(struct net_device *dev,
  2097. struct netdev_notifier_changeupper_info *info)
  2098. {
  2099. struct dsa_port *dp = dsa_slave_to_port(dev);
  2100. struct netlink_ext_ack *extack;
  2101. int err = NOTIFY_DONE;
  2102. if (!dsa_slave_dev_check(dev))
  2103. return err;
  2104. extack = netdev_notifier_info_to_extack(&info->info);
  2105. if (netif_is_bridge_master(info->upper_dev)) {
  2106. if (info->linking) {
  2107. err = dsa_port_bridge_join(dp, info->upper_dev, extack);
  2108. if (!err)
  2109. dsa_bridge_mtu_normalization(dp);
  2110. if (err == -EOPNOTSUPP) {
  2111. if (extack && !extack->_msg)
  2112. NL_SET_ERR_MSG_MOD(extack,
  2113. "Offloading not supported");
  2114. err = 0;
  2115. }
  2116. err = notifier_from_errno(err);
  2117. } else {
  2118. dsa_port_bridge_leave(dp, info->upper_dev);
  2119. err = NOTIFY_OK;
  2120. }
  2121. } else if (netif_is_lag_master(info->upper_dev)) {
  2122. if (info->linking) {
  2123. err = dsa_port_lag_join(dp, info->upper_dev,
  2124. info->upper_info, extack);
  2125. if (err == -EOPNOTSUPP) {
  2126. NL_SET_ERR_MSG_MOD(info->info.extack,
  2127. "Offloading not supported");
  2128. err = 0;
  2129. }
  2130. err = notifier_from_errno(err);
  2131. } else {
  2132. dsa_port_lag_leave(dp, info->upper_dev);
  2133. err = NOTIFY_OK;
  2134. }
  2135. } else if (is_hsr_master(info->upper_dev)) {
  2136. if (info->linking) {
  2137. err = dsa_port_hsr_join(dp, info->upper_dev);
  2138. if (err == -EOPNOTSUPP) {
  2139. NL_SET_ERR_MSG_MOD(info->info.extack,
  2140. "Offloading not supported");
  2141. err = 0;
  2142. }
  2143. err = notifier_from_errno(err);
  2144. } else {
  2145. dsa_port_hsr_leave(dp, info->upper_dev);
  2146. err = NOTIFY_OK;
  2147. }
  2148. }
  2149. return err;
  2150. }
  2151. static int dsa_slave_prechangeupper(struct net_device *dev,
  2152. struct netdev_notifier_changeupper_info *info)
  2153. {
  2154. struct dsa_port *dp = dsa_slave_to_port(dev);
  2155. if (!dsa_slave_dev_check(dev))
  2156. return NOTIFY_DONE;
  2157. if (netif_is_bridge_master(info->upper_dev) && !info->linking)
  2158. dsa_port_pre_bridge_leave(dp, info->upper_dev);
  2159. else if (netif_is_lag_master(info->upper_dev) && !info->linking)
  2160. dsa_port_pre_lag_leave(dp, info->upper_dev);
  2161. /* dsa_port_pre_hsr_leave is not yet necessary since hsr cannot be
  2162. * meaningfully enslaved to a bridge yet
  2163. */
  2164. return NOTIFY_DONE;
  2165. }
  2166. static int
  2167. dsa_slave_lag_changeupper(struct net_device *dev,
  2168. struct netdev_notifier_changeupper_info *info)
  2169. {
  2170. struct net_device *lower;
  2171. struct list_head *iter;
  2172. int err = NOTIFY_DONE;
  2173. struct dsa_port *dp;
  2174. if (!netif_is_lag_master(dev))
  2175. return err;
  2176. netdev_for_each_lower_dev(dev, lower, iter) {
  2177. if (!dsa_slave_dev_check(lower))
  2178. continue;
  2179. dp = dsa_slave_to_port(lower);
  2180. if (!dp->lag)
  2181. /* Software LAG */
  2182. continue;
  2183. err = dsa_slave_changeupper(lower, info);
  2184. if (notifier_to_errno(err))
  2185. break;
  2186. }
  2187. return err;
  2188. }
  2189. /* Same as dsa_slave_lag_changeupper() except that it calls
  2190. * dsa_slave_prechangeupper()
  2191. */
  2192. static int
  2193. dsa_slave_lag_prechangeupper(struct net_device *dev,
  2194. struct netdev_notifier_changeupper_info *info)
  2195. {
  2196. struct net_device *lower;
  2197. struct list_head *iter;
  2198. int err = NOTIFY_DONE;
  2199. struct dsa_port *dp;
  2200. if (!netif_is_lag_master(dev))
  2201. return err;
  2202. netdev_for_each_lower_dev(dev, lower, iter) {
  2203. if (!dsa_slave_dev_check(lower))
  2204. continue;
  2205. dp = dsa_slave_to_port(lower);
  2206. if (!dp->lag)
  2207. /* Software LAG */
  2208. continue;
  2209. err = dsa_slave_prechangeupper(lower, info);
  2210. if (notifier_to_errno(err))
  2211. break;
  2212. }
  2213. return err;
  2214. }
  2215. static int
  2216. dsa_prevent_bridging_8021q_upper(struct net_device *dev,
  2217. struct netdev_notifier_changeupper_info *info)
  2218. {
  2219. struct netlink_ext_ack *ext_ack;
  2220. struct net_device *slave, *br;
  2221. struct dsa_port *dp;
  2222. ext_ack = netdev_notifier_info_to_extack(&info->info);
  2223. if (!is_vlan_dev(dev))
  2224. return NOTIFY_DONE;
  2225. slave = vlan_dev_real_dev(dev);
  2226. if (!dsa_slave_dev_check(slave))
  2227. return NOTIFY_DONE;
  2228. dp = dsa_slave_to_port(slave);
  2229. br = dsa_port_bridge_dev_get(dp);
  2230. if (!br)
  2231. return NOTIFY_DONE;
  2232. /* Deny enslaving a VLAN device into a VLAN-aware bridge */
  2233. if (br_vlan_enabled(br) &&
  2234. netif_is_bridge_master(info->upper_dev) && info->linking) {
  2235. NL_SET_ERR_MSG_MOD(ext_ack,
  2236. "Cannot enslave VLAN device into VLAN aware bridge");
  2237. return notifier_from_errno(-EINVAL);
  2238. }
  2239. return NOTIFY_DONE;
  2240. }
  2241. static int
  2242. dsa_slave_check_8021q_upper(struct net_device *dev,
  2243. struct netdev_notifier_changeupper_info *info)
  2244. {
  2245. struct dsa_port *dp = dsa_slave_to_port(dev);
  2246. struct net_device *br = dsa_port_bridge_dev_get(dp);
  2247. struct bridge_vlan_info br_info;
  2248. struct netlink_ext_ack *extack;
  2249. int err = NOTIFY_DONE;
  2250. u16 vid;
  2251. if (!br || !br_vlan_enabled(br))
  2252. return NOTIFY_DONE;
  2253. extack = netdev_notifier_info_to_extack(&info->info);
  2254. vid = vlan_dev_vlan_id(info->upper_dev);
  2255. /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
  2256. * device, respectively the VID is not found, returning
  2257. * 0 means success, which is a failure for us here.
  2258. */
  2259. err = br_vlan_get_info(br, vid, &br_info);
  2260. if (err == 0) {
  2261. NL_SET_ERR_MSG_MOD(extack,
  2262. "This VLAN is already configured by the bridge");
  2263. return notifier_from_errno(-EBUSY);
  2264. }
  2265. return NOTIFY_DONE;
  2266. }
  2267. static int
  2268. dsa_slave_prechangeupper_sanity_check(struct net_device *dev,
  2269. struct netdev_notifier_changeupper_info *info)
  2270. {
  2271. struct dsa_switch *ds;
  2272. struct dsa_port *dp;
  2273. int err;
  2274. if (!dsa_slave_dev_check(dev))
  2275. return dsa_prevent_bridging_8021q_upper(dev, info);
  2276. dp = dsa_slave_to_port(dev);
  2277. ds = dp->ds;
  2278. if (ds->ops->port_prechangeupper) {
  2279. err = ds->ops->port_prechangeupper(ds, dp->index, info);
  2280. if (err)
  2281. return notifier_from_errno(err);
  2282. }
  2283. if (is_vlan_dev(info->upper_dev))
  2284. return dsa_slave_check_8021q_upper(dev, info);
  2285. return NOTIFY_DONE;
  2286. }
  2287. /* To be eligible as a DSA master, a LAG must have all lower interfaces be
  2288. * eligible DSA masters. Additionally, all LAG slaves must be DSA masters of
  2289. * switches in the same switch tree.
  2290. */
  2291. static int dsa_lag_master_validate(struct net_device *lag_dev,
  2292. struct netlink_ext_ack *extack)
  2293. {
  2294. struct net_device *lower1, *lower2;
  2295. struct list_head *iter1, *iter2;
  2296. netdev_for_each_lower_dev(lag_dev, lower1, iter1) {
  2297. netdev_for_each_lower_dev(lag_dev, lower2, iter2) {
  2298. if (!netdev_uses_dsa(lower1) ||
  2299. !netdev_uses_dsa(lower2)) {
  2300. NL_SET_ERR_MSG_MOD(extack,
  2301. "All LAG ports must be eligible as DSA masters");
  2302. return notifier_from_errno(-EINVAL);
  2303. }
  2304. if (lower1 == lower2)
  2305. continue;
  2306. if (!dsa_port_tree_same(lower1->dsa_ptr,
  2307. lower2->dsa_ptr)) {
  2308. NL_SET_ERR_MSG_MOD(extack,
  2309. "LAG contains DSA masters of disjoint switch trees");
  2310. return notifier_from_errno(-EINVAL);
  2311. }
  2312. }
  2313. }
  2314. return NOTIFY_DONE;
  2315. }
  2316. static int
  2317. dsa_master_prechangeupper_sanity_check(struct net_device *master,
  2318. struct netdev_notifier_changeupper_info *info)
  2319. {
  2320. struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info);
  2321. if (!netdev_uses_dsa(master))
  2322. return NOTIFY_DONE;
  2323. if (!info->linking)
  2324. return NOTIFY_DONE;
  2325. /* Allow DSA switch uppers */
  2326. if (dsa_slave_dev_check(info->upper_dev))
  2327. return NOTIFY_DONE;
  2328. /* Allow bridge uppers of DSA masters, subject to further
  2329. * restrictions in dsa_bridge_prechangelower_sanity_check()
  2330. */
  2331. if (netif_is_bridge_master(info->upper_dev))
  2332. return NOTIFY_DONE;
  2333. /* Allow LAG uppers, subject to further restrictions in
  2334. * dsa_lag_master_prechangelower_sanity_check()
  2335. */
  2336. if (netif_is_lag_master(info->upper_dev))
  2337. return dsa_lag_master_validate(info->upper_dev, extack);
  2338. NL_SET_ERR_MSG_MOD(extack,
  2339. "DSA master cannot join unknown upper interfaces");
  2340. return notifier_from_errno(-EBUSY);
  2341. }
  2342. static int
  2343. dsa_lag_master_prechangelower_sanity_check(struct net_device *dev,
  2344. struct netdev_notifier_changeupper_info *info)
  2345. {
  2346. struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info);
  2347. struct net_device *lag_dev = info->upper_dev;
  2348. struct net_device *lower;
  2349. struct list_head *iter;
  2350. if (!netdev_uses_dsa(lag_dev) || !netif_is_lag_master(lag_dev))
  2351. return NOTIFY_DONE;
  2352. if (!info->linking)
  2353. return NOTIFY_DONE;
  2354. if (!netdev_uses_dsa(dev)) {
  2355. NL_SET_ERR_MSG(extack,
  2356. "Only DSA masters can join a LAG DSA master");
  2357. return notifier_from_errno(-EINVAL);
  2358. }
  2359. netdev_for_each_lower_dev(lag_dev, lower, iter) {
  2360. if (!dsa_port_tree_same(dev->dsa_ptr, lower->dsa_ptr)) {
  2361. NL_SET_ERR_MSG(extack,
  2362. "Interface is DSA master for a different switch tree than this LAG");
  2363. return notifier_from_errno(-EINVAL);
  2364. }
  2365. break;
  2366. }
  2367. return NOTIFY_DONE;
  2368. }
  2369. /* Don't allow bridging of DSA masters, since the bridge layer rx_handler
  2370. * prevents the DSA fake ethertype handler to be invoked, so we don't get the
  2371. * chance to strip off and parse the DSA switch tag protocol header (the bridge
  2372. * layer just returns RX_HANDLER_CONSUMED, stopping RX processing for these
  2373. * frames).
  2374. * The only case where that would not be an issue is when bridging can already
  2375. * be offloaded, such as when the DSA master is itself a DSA or plain switchdev
  2376. * port, and is bridged only with other ports from the same hardware device.
  2377. */
  2378. static int
  2379. dsa_bridge_prechangelower_sanity_check(struct net_device *new_lower,
  2380. struct netdev_notifier_changeupper_info *info)
  2381. {
  2382. struct net_device *br = info->upper_dev;
  2383. struct netlink_ext_ack *extack;
  2384. struct net_device *lower;
  2385. struct list_head *iter;
  2386. if (!netif_is_bridge_master(br))
  2387. return NOTIFY_DONE;
  2388. if (!info->linking)
  2389. return NOTIFY_DONE;
  2390. extack = netdev_notifier_info_to_extack(&info->info);
  2391. netdev_for_each_lower_dev(br, lower, iter) {
  2392. if (!netdev_uses_dsa(new_lower) && !netdev_uses_dsa(lower))
  2393. continue;
  2394. if (!netdev_port_same_parent_id(lower, new_lower)) {
  2395. NL_SET_ERR_MSG(extack,
  2396. "Cannot do software bridging with a DSA master");
  2397. return notifier_from_errno(-EINVAL);
  2398. }
  2399. }
  2400. return NOTIFY_DONE;
  2401. }
  2402. static void dsa_tree_migrate_ports_from_lag_master(struct dsa_switch_tree *dst,
  2403. struct net_device *lag_dev)
  2404. {
  2405. struct net_device *new_master = dsa_tree_find_first_master(dst);
  2406. struct dsa_port *dp;
  2407. int err;
  2408. dsa_tree_for_each_user_port(dp, dst) {
  2409. if (dsa_port_to_master(dp) != lag_dev)
  2410. continue;
  2411. err = dsa_slave_change_master(dp->slave, new_master, NULL);
  2412. if (err) {
  2413. netdev_err(dp->slave,
  2414. "failed to restore master to %s: %pe\n",
  2415. new_master->name, ERR_PTR(err));
  2416. }
  2417. }
  2418. }
  2419. static int dsa_master_lag_join(struct net_device *master,
  2420. struct net_device *lag_dev,
  2421. struct netdev_lag_upper_info *uinfo,
  2422. struct netlink_ext_ack *extack)
  2423. {
  2424. struct dsa_port *cpu_dp = master->dsa_ptr;
  2425. struct dsa_switch_tree *dst = cpu_dp->dst;
  2426. struct dsa_port *dp;
  2427. int err;
  2428. err = dsa_master_lag_setup(lag_dev, cpu_dp, uinfo, extack);
  2429. if (err)
  2430. return err;
  2431. dsa_tree_for_each_user_port(dp, dst) {
  2432. if (dsa_port_to_master(dp) != master)
  2433. continue;
  2434. err = dsa_slave_change_master(dp->slave, lag_dev, extack);
  2435. if (err)
  2436. goto restore;
  2437. }
  2438. return 0;
  2439. restore:
  2440. dsa_tree_for_each_user_port_continue_reverse(dp, dst) {
  2441. if (dsa_port_to_master(dp) != lag_dev)
  2442. continue;
  2443. err = dsa_slave_change_master(dp->slave, master, NULL);
  2444. if (err) {
  2445. netdev_err(dp->slave,
  2446. "failed to restore master to %s: %pe\n",
  2447. master->name, ERR_PTR(err));
  2448. }
  2449. }
  2450. dsa_master_lag_teardown(lag_dev, master->dsa_ptr);
  2451. return err;
  2452. }
  2453. static void dsa_master_lag_leave(struct net_device *master,
  2454. struct net_device *lag_dev)
  2455. {
  2456. struct dsa_port *dp, *cpu_dp = lag_dev->dsa_ptr;
  2457. struct dsa_switch_tree *dst = cpu_dp->dst;
  2458. struct dsa_port *new_cpu_dp = NULL;
  2459. struct net_device *lower;
  2460. struct list_head *iter;
  2461. netdev_for_each_lower_dev(lag_dev, lower, iter) {
  2462. if (netdev_uses_dsa(lower)) {
  2463. new_cpu_dp = lower->dsa_ptr;
  2464. break;
  2465. }
  2466. }
  2467. if (new_cpu_dp) {
  2468. /* Update the CPU port of the user ports still under the LAG
  2469. * so that dsa_port_to_master() continues to work properly
  2470. */
  2471. dsa_tree_for_each_user_port(dp, dst)
  2472. if (dsa_port_to_master(dp) == lag_dev)
  2473. dp->cpu_dp = new_cpu_dp;
  2474. /* Update the index of the virtual CPU port to match the lowest
  2475. * physical CPU port
  2476. */
  2477. lag_dev->dsa_ptr = new_cpu_dp;
  2478. wmb();
  2479. } else {
  2480. /* If the LAG DSA master has no ports left, migrate back all
  2481. * user ports to the first physical CPU port
  2482. */
  2483. dsa_tree_migrate_ports_from_lag_master(dst, lag_dev);
  2484. }
  2485. /* This DSA master has left its LAG in any case, so let
  2486. * the CPU port leave the hardware LAG as well
  2487. */
  2488. dsa_master_lag_teardown(lag_dev, master->dsa_ptr);
  2489. }
  2490. static int dsa_master_changeupper(struct net_device *dev,
  2491. struct netdev_notifier_changeupper_info *info)
  2492. {
  2493. struct netlink_ext_ack *extack;
  2494. int err = NOTIFY_DONE;
  2495. if (!netdev_uses_dsa(dev))
  2496. return err;
  2497. extack = netdev_notifier_info_to_extack(&info->info);
  2498. if (netif_is_lag_master(info->upper_dev)) {
  2499. if (info->linking) {
  2500. err = dsa_master_lag_join(dev, info->upper_dev,
  2501. info->upper_info, extack);
  2502. err = notifier_from_errno(err);
  2503. } else {
  2504. dsa_master_lag_leave(dev, info->upper_dev);
  2505. err = NOTIFY_OK;
  2506. }
  2507. }
  2508. return err;
  2509. }
  2510. static int dsa_slave_netdevice_event(struct notifier_block *nb,
  2511. unsigned long event, void *ptr)
  2512. {
  2513. struct net_device *dev = netdev_notifier_info_to_dev(ptr);
  2514. switch (event) {
  2515. case NETDEV_PRECHANGEUPPER: {
  2516. struct netdev_notifier_changeupper_info *info = ptr;
  2517. int err;
  2518. err = dsa_slave_prechangeupper_sanity_check(dev, info);
  2519. if (notifier_to_errno(err))
  2520. return err;
  2521. err = dsa_master_prechangeupper_sanity_check(dev, info);
  2522. if (notifier_to_errno(err))
  2523. return err;
  2524. err = dsa_lag_master_prechangelower_sanity_check(dev, info);
  2525. if (notifier_to_errno(err))
  2526. return err;
  2527. err = dsa_bridge_prechangelower_sanity_check(dev, info);
  2528. if (notifier_to_errno(err))
  2529. return err;
  2530. err = dsa_slave_prechangeupper(dev, ptr);
  2531. if (notifier_to_errno(err))
  2532. return err;
  2533. err = dsa_slave_lag_prechangeupper(dev, ptr);
  2534. if (notifier_to_errno(err))
  2535. return err;
  2536. break;
  2537. }
  2538. case NETDEV_CHANGEUPPER: {
  2539. int err;
  2540. err = dsa_slave_changeupper(dev, ptr);
  2541. if (notifier_to_errno(err))
  2542. return err;
  2543. err = dsa_slave_lag_changeupper(dev, ptr);
  2544. if (notifier_to_errno(err))
  2545. return err;
  2546. err = dsa_master_changeupper(dev, ptr);
  2547. if (notifier_to_errno(err))
  2548. return err;
  2549. break;
  2550. }
  2551. case NETDEV_CHANGELOWERSTATE: {
  2552. struct netdev_notifier_changelowerstate_info *info = ptr;
  2553. struct dsa_port *dp;
  2554. int err = 0;
  2555. if (dsa_slave_dev_check(dev)) {
  2556. dp = dsa_slave_to_port(dev);
  2557. err = dsa_port_lag_change(dp, info->lower_state_info);
  2558. }
  2559. /* Mirror LAG port events on DSA masters that are in
  2560. * a LAG towards their respective switch CPU ports
  2561. */
  2562. if (netdev_uses_dsa(dev)) {
  2563. dp = dev->dsa_ptr;
  2564. err = dsa_port_lag_change(dp, info->lower_state_info);
  2565. }
  2566. return notifier_from_errno(err);
  2567. }
  2568. case NETDEV_CHANGE:
  2569. case NETDEV_UP: {
  2570. /* Track state of master port.
  2571. * DSA driver may require the master port (and indirectly
  2572. * the tagger) to be available for some special operation.
  2573. */
  2574. if (netdev_uses_dsa(dev)) {
  2575. struct dsa_port *cpu_dp = dev->dsa_ptr;
  2576. struct dsa_switch_tree *dst = cpu_dp->ds->dst;
  2577. /* Track when the master port is UP */
  2578. dsa_tree_master_oper_state_change(dst, dev,
  2579. netif_oper_up(dev));
  2580. /* Track when the master port is ready and can accept
  2581. * packet.
  2582. * NETDEV_UP event is not enough to flag a port as ready.
  2583. * We also have to wait for linkwatch_do_dev to dev_activate
  2584. * and emit a NETDEV_CHANGE event.
  2585. * We check if a master port is ready by checking if the dev
  2586. * have a qdisc assigned and is not noop.
  2587. */
  2588. dsa_tree_master_admin_state_change(dst, dev,
  2589. !qdisc_tx_is_noop(dev));
  2590. return NOTIFY_OK;
  2591. }
  2592. return NOTIFY_DONE;
  2593. }
  2594. case NETDEV_GOING_DOWN: {
  2595. struct dsa_port *dp, *cpu_dp;
  2596. struct dsa_switch_tree *dst;
  2597. LIST_HEAD(close_list);
  2598. if (!netdev_uses_dsa(dev))
  2599. return NOTIFY_DONE;
  2600. cpu_dp = dev->dsa_ptr;
  2601. dst = cpu_dp->ds->dst;
  2602. dsa_tree_master_admin_state_change(dst, dev, false);
  2603. list_for_each_entry(dp, &dst->ports, list) {
  2604. if (!dsa_port_is_user(dp))
  2605. continue;
  2606. if (dp->cpu_dp != cpu_dp)
  2607. continue;
  2608. list_add(&dp->slave->close_list, &close_list);
  2609. }
  2610. dev_close_many(&close_list, true);
  2611. return NOTIFY_OK;
  2612. }
  2613. default:
  2614. break;
  2615. }
  2616. return NOTIFY_DONE;
  2617. }
  2618. static void
  2619. dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work)
  2620. {
  2621. struct switchdev_notifier_fdb_info info = {};
  2622. info.addr = switchdev_work->addr;
  2623. info.vid = switchdev_work->vid;
  2624. info.offloaded = true;
  2625. call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
  2626. switchdev_work->orig_dev, &info.info, NULL);
  2627. }
  2628. static void dsa_slave_switchdev_event_work(struct work_struct *work)
  2629. {
  2630. struct dsa_switchdev_event_work *switchdev_work =
  2631. container_of(work, struct dsa_switchdev_event_work, work);
  2632. const unsigned char *addr = switchdev_work->addr;
  2633. struct net_device *dev = switchdev_work->dev;
  2634. u16 vid = switchdev_work->vid;
  2635. struct dsa_switch *ds;
  2636. struct dsa_port *dp;
  2637. int err;
  2638. dp = dsa_slave_to_port(dev);
  2639. ds = dp->ds;
  2640. switch (switchdev_work->event) {
  2641. case SWITCHDEV_FDB_ADD_TO_DEVICE:
  2642. if (switchdev_work->host_addr)
  2643. err = dsa_port_bridge_host_fdb_add(dp, addr, vid);
  2644. else if (dp->lag)
  2645. err = dsa_port_lag_fdb_add(dp, addr, vid);
  2646. else
  2647. err = dsa_port_fdb_add(dp, addr, vid);
  2648. if (err) {
  2649. dev_err(ds->dev,
  2650. "port %d failed to add %pM vid %d to fdb: %d\n",
  2651. dp->index, addr, vid, err);
  2652. break;
  2653. }
  2654. dsa_fdb_offload_notify(switchdev_work);
  2655. break;
  2656. case SWITCHDEV_FDB_DEL_TO_DEVICE:
  2657. if (switchdev_work->host_addr)
  2658. err = dsa_port_bridge_host_fdb_del(dp, addr, vid);
  2659. else if (dp->lag)
  2660. err = dsa_port_lag_fdb_del(dp, addr, vid);
  2661. else
  2662. err = dsa_port_fdb_del(dp, addr, vid);
  2663. if (err) {
  2664. dev_err(ds->dev,
  2665. "port %d failed to delete %pM vid %d from fdb: %d\n",
  2666. dp->index, addr, vid, err);
  2667. }
  2668. break;
  2669. }
  2670. kfree(switchdev_work);
  2671. }
  2672. static bool dsa_foreign_dev_check(const struct net_device *dev,
  2673. const struct net_device *foreign_dev)
  2674. {
  2675. const struct dsa_port *dp = dsa_slave_to_port(dev);
  2676. struct dsa_switch_tree *dst = dp->ds->dst;
  2677. if (netif_is_bridge_master(foreign_dev))
  2678. return !dsa_tree_offloads_bridge_dev(dst, foreign_dev);
  2679. if (netif_is_bridge_port(foreign_dev))
  2680. return !dsa_tree_offloads_bridge_port(dst, foreign_dev);
  2681. /* Everything else is foreign */
  2682. return true;
  2683. }
  2684. static int dsa_slave_fdb_event(struct net_device *dev,
  2685. struct net_device *orig_dev,
  2686. unsigned long event, const void *ctx,
  2687. const struct switchdev_notifier_fdb_info *fdb_info)
  2688. {
  2689. struct dsa_switchdev_event_work *switchdev_work;
  2690. struct dsa_port *dp = dsa_slave_to_port(dev);
  2691. bool host_addr = fdb_info->is_local;
  2692. struct dsa_switch *ds = dp->ds;
  2693. if (ctx && ctx != dp)
  2694. return 0;
  2695. if (!dp->bridge)
  2696. return 0;
  2697. if (switchdev_fdb_is_dynamically_learned(fdb_info)) {
  2698. if (dsa_port_offloads_bridge_port(dp, orig_dev))
  2699. return 0;
  2700. /* FDB entries learned by the software bridge or by foreign
  2701. * bridge ports should be installed as host addresses only if
  2702. * the driver requests assisted learning.
  2703. */
  2704. if (!ds->assisted_learning_on_cpu_port)
  2705. return 0;
  2706. }
  2707. /* Also treat FDB entries on foreign interfaces bridged with us as host
  2708. * addresses.
  2709. */
  2710. if (dsa_foreign_dev_check(dev, orig_dev))
  2711. host_addr = true;
  2712. /* Check early that we're not doing work in vain.
  2713. * Host addresses on LAG ports still require regular FDB ops,
  2714. * since the CPU port isn't in a LAG.
  2715. */
  2716. if (dp->lag && !host_addr) {
  2717. if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del)
  2718. return -EOPNOTSUPP;
  2719. } else {
  2720. if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del)
  2721. return -EOPNOTSUPP;
  2722. }
  2723. switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
  2724. if (!switchdev_work)
  2725. return -ENOMEM;
  2726. netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n",
  2727. event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting",
  2728. orig_dev->name, fdb_info->addr, fdb_info->vid,
  2729. host_addr ? " as host address" : "");
  2730. INIT_WORK(&switchdev_work->work, dsa_slave_switchdev_event_work);
  2731. switchdev_work->event = event;
  2732. switchdev_work->dev = dev;
  2733. switchdev_work->orig_dev = orig_dev;
  2734. ether_addr_copy(switchdev_work->addr, fdb_info->addr);
  2735. switchdev_work->vid = fdb_info->vid;
  2736. switchdev_work->host_addr = host_addr;
  2737. dsa_schedule_work(&switchdev_work->work);
  2738. return 0;
  2739. }
  2740. /* Called under rcu_read_lock() */
  2741. static int dsa_slave_switchdev_event(struct notifier_block *unused,
  2742. unsigned long event, void *ptr)
  2743. {
  2744. struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
  2745. int err;
  2746. switch (event) {
  2747. case SWITCHDEV_PORT_ATTR_SET:
  2748. err = switchdev_handle_port_attr_set(dev, ptr,
  2749. dsa_slave_dev_check,
  2750. dsa_slave_port_attr_set);
  2751. return notifier_from_errno(err);
  2752. case SWITCHDEV_FDB_ADD_TO_DEVICE:
  2753. case SWITCHDEV_FDB_DEL_TO_DEVICE:
  2754. err = switchdev_handle_fdb_event_to_device(dev, event, ptr,
  2755. dsa_slave_dev_check,
  2756. dsa_foreign_dev_check,
  2757. dsa_slave_fdb_event);
  2758. return notifier_from_errno(err);
  2759. default:
  2760. return NOTIFY_DONE;
  2761. }
  2762. return NOTIFY_OK;
  2763. }
  2764. static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
  2765. unsigned long event, void *ptr)
  2766. {
  2767. struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
  2768. int err;
  2769. switch (event) {
  2770. case SWITCHDEV_PORT_OBJ_ADD:
  2771. err = switchdev_handle_port_obj_add_foreign(dev, ptr,
  2772. dsa_slave_dev_check,
  2773. dsa_foreign_dev_check,
  2774. dsa_slave_port_obj_add);
  2775. return notifier_from_errno(err);
  2776. case SWITCHDEV_PORT_OBJ_DEL:
  2777. err = switchdev_handle_port_obj_del_foreign(dev, ptr,
  2778. dsa_slave_dev_check,
  2779. dsa_foreign_dev_check,
  2780. dsa_slave_port_obj_del);
  2781. return notifier_from_errno(err);
  2782. case SWITCHDEV_PORT_ATTR_SET:
  2783. err = switchdev_handle_port_attr_set(dev, ptr,
  2784. dsa_slave_dev_check,
  2785. dsa_slave_port_attr_set);
  2786. return notifier_from_errno(err);
  2787. }
  2788. return NOTIFY_DONE;
  2789. }
  2790. static struct notifier_block dsa_slave_nb __read_mostly = {
  2791. .notifier_call = dsa_slave_netdevice_event,
  2792. };
  2793. struct notifier_block dsa_slave_switchdev_notifier = {
  2794. .notifier_call = dsa_slave_switchdev_event,
  2795. };
  2796. struct notifier_block dsa_slave_switchdev_blocking_notifier = {
  2797. .notifier_call = dsa_slave_switchdev_blocking_event,
  2798. };
  2799. int dsa_slave_register_notifier(void)
  2800. {
  2801. struct notifier_block *nb;
  2802. int err;
  2803. err = register_netdevice_notifier(&dsa_slave_nb);
  2804. if (err)
  2805. return err;
  2806. err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
  2807. if (err)
  2808. goto err_switchdev_nb;
  2809. nb = &dsa_slave_switchdev_blocking_notifier;
  2810. err = register_switchdev_blocking_notifier(nb);
  2811. if (err)
  2812. goto err_switchdev_blocking_nb;
  2813. return 0;
  2814. err_switchdev_blocking_nb:
  2815. unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
  2816. err_switchdev_nb:
  2817. unregister_netdevice_notifier(&dsa_slave_nb);
  2818. return err;
  2819. }
  2820. void dsa_slave_unregister_notifier(void)
  2821. {
  2822. struct notifier_block *nb;
  2823. int err;
  2824. nb = &dsa_slave_switchdev_blocking_notifier;
  2825. err = unregister_switchdev_blocking_notifier(nb);
  2826. if (err)
  2827. pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
  2828. err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
  2829. if (err)
  2830. pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
  2831. err = unregister_netdevice_notifier(&dsa_slave_nb);
  2832. if (err)
  2833. pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
  2834. }