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net: dsa: don't fast age standalone ports
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2874c5fd 1// SPDX-License-Identifier: GPL-2.0-or-later
91da11f8
LB		 2/*
3 * net/dsa/slave.c - Slave device handling
e84665c9 4 * Copyright (c) 2008-2009 Marvell Semiconductor
91da11f8
LB		 5 */
6
7#include <linux/list.h>
df02c6ff 8#include <linux/etherdevice.h>
b73adef6 9#include <linux/netdevice.h>
91da11f8 10#include <linux/phy.h>
a2820543 11#include <linux/phy_fixed.h>
aab9c406 12#include <linux/phylink.h>
0d8bcdd3
FF		 13#include <linux/of_net.h>
14#include <linux/of_mdio.h>
7f854420 15#include <linux/mdio.h>
b73adef6 16#include <net/rtnetlink.h>
f50f2127 17#include <net/pkt_cls.h>
a71acad9 18#include <net/selftests.h>
f50f2127 19#include <net/tc_act/tc_mirred.h>
b73adef6 20#include <linux/if_bridge.h>
18596f50 21#include <linux/if_hsr.h>
04ff53f9 22#include <linux/netpoll.h>
ea5dd34b 23
91da11f8
LB		 24#include "dsa_priv.h"
25
26/* slave mii_bus handling ***************************************************/
27static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
28{
29 struct dsa_switch *ds = bus->priv;
30
0d8bcdd3 31 if (ds->phys_mii_mask & (1 << addr))
9d490b4e 32 return ds->ops->phy_read(ds, addr, reg);
91da11f8
LB		 33
34 return 0xffff;
35}
36
37static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
38{
39 struct dsa_switch *ds = bus->priv;
40
0d8bcdd3 41 if (ds->phys_mii_mask & (1 << addr))
9d490b4e 42 return ds->ops->phy_write(ds, addr, reg, val);
91da11f8
LB		 43
44 return 0;
45}
46
47void dsa_slave_mii_bus_init(struct dsa_switch *ds)
48{
49 ds->slave_mii_bus->priv = (void *)ds;
50 ds->slave_mii_bus->name = "dsa slave smi";
51 ds->slave_mii_bus->read = dsa_slave_phy_read;
52 ds->slave_mii_bus->write = dsa_slave_phy_write;
0b7b498d 53 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
49463b7f 54 ds->dst->index, ds->index);
c33063d6 55 ds->slave_mii_bus->parent = ds->dev;
24df8986 56 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
91da11f8
LB		 57}
58
59
60/* slave device handling ****************************************************/
abd2be00 61static int dsa_slave_get_iflink(const struct net_device *dev)
c0840801 62{
d0006b00 63 return dsa_slave_to_master(dev)->ifindex;
c0840801
LB		 64}
65
91da11f8
LB		 66static int dsa_slave_open(struct net_device *dev)
67{
d0006b00 68 struct net_device *master = dsa_slave_to_master(dev);
d945097b 69 struct dsa_port *dp = dsa_slave_to_port(dev);
df02c6ff
LB		 70 int err;
71
9d5ef190
VO		 72 err = dev_open(master, NULL);
73 if (err < 0) {
74 netdev_err(dev, "failed to open master %s\n", master->name);
75 goto out;
76 }
df02c6ff 77
8feedbb4 78 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
a748ee24 79 err = dev_uc_add(master, dev->dev_addr);
df02c6ff
LB		 80 if (err < 0)
81 goto out;
82 }
83
84 if (dev->flags & IFF_ALLMULTI) {
85 err = dev_set_allmulti(master, 1);
86 if (err < 0)
87 goto del_unicast;
88 }
89 if (dev->flags & IFF_PROMISC) {
90 err = dev_set_promiscuity(master, 1);
91 if (err < 0)
92 goto clear_allmulti;
93 }
94
8640f8dc 95 err = dsa_port_enable_rt(dp, dev->phydev);
fb8a6a2b
VD		 96 if (err)
97 goto clear_promisc;
b73adef6 98
91da11f8 99 return 0;
df02c6ff 100
b2f2af21
FF		 101clear_promisc:
102 if (dev->flags & IFF_PROMISC)
4fdeddfe 103 dev_set_promiscuity(master, -1);
df02c6ff
LB		 104clear_allmulti:
105 if (dev->flags & IFF_ALLMULTI)
106 dev_set_allmulti(master, -1);
107del_unicast:
8feedbb4 108 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
a748ee24 109 dev_uc_del(master, dev->dev_addr);
df02c6ff
LB		 110out:
111 return err;
91da11f8
LB		 112}
113
114static int dsa_slave_close(struct net_device *dev)
115{
d0006b00 116 struct net_device *master = dsa_slave_to_master(dev);
d945097b 117 struct dsa_port *dp = dsa_slave_to_port(dev);
df02c6ff 118
8640f8dc 119 dsa_port_disable_rt(dp);
6457edfe 120
df02c6ff 121 dev_mc_unsync(master, dev);
a748ee24 122 dev_uc_unsync(master, dev);
df02c6ff
LB		 123 if (dev->flags & IFF_ALLMULTI)
124 dev_set_allmulti(master, -1);
125 if (dev->flags & IFF_PROMISC)
126 dev_set_promiscuity(master, -1);
127
8feedbb4 128 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
a748ee24 129 dev_uc_del(master, dev->dev_addr);
df02c6ff 130
91da11f8
LB		 131 return 0;
132}
133
134static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
135{
d0006b00 136 struct net_device *master = dsa_slave_to_master(dev);
17ab4f61
RG		 137 if (dev->flags & IFF_UP) {
138 if (change & IFF_ALLMULTI)
139 dev_set_allmulti(master,
140 dev->flags & IFF_ALLMULTI ? 1 : -1);
141 if (change & IFF_PROMISC)
142 dev_set_promiscuity(master,
143 dev->flags & IFF_PROMISC ? 1 : -1);
144 }
91da11f8
LB		 145}
146
147static void dsa_slave_set_rx_mode(struct net_device *dev)
148{
d0006b00 149 struct net_device *master = dsa_slave_to_master(dev);
91da11f8
LB		 150
151 dev_mc_sync(master, dev);
a748ee24 152 dev_uc_sync(master, dev);
91da11f8
LB		 153}
154
df02c6ff 155static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
91da11f8 156{
d0006b00 157 struct net_device *master = dsa_slave_to_master(dev);
df02c6ff
LB		 158 struct sockaddr *addr = a;
159 int err;
160
161 if (!is_valid_ether_addr(addr->sa_data))
162 return -EADDRNOTAVAIL;
163
164 if (!(dev->flags & IFF_UP))
165 goto out;
166
8feedbb4 167 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
a748ee24 168 err = dev_uc_add(master, addr->sa_data);
df02c6ff
LB		 169 if (err < 0)
170 return err;
171 }
172
8feedbb4 173 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
a748ee24 174 dev_uc_del(master, dev->dev_addr);
df02c6ff
LB		 175
176out:
d08f161a 177 ether_addr_copy(dev->dev_addr, addr->sa_data);
91da11f8
LB		 178
179 return 0;
180}
181
2bedde1a
AS		 182struct dsa_slave_dump_ctx {
183 struct net_device *dev;
184 struct sk_buff *skb;
185 struct netlink_callback *cb;
186 int idx;
187};
188
189static int
190dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
191 bool is_static, void *data)
192{
193 struct dsa_slave_dump_ctx *dump = data;
194 u32 portid = NETLINK_CB(dump->cb->skb).portid;
195 u32 seq = dump->cb->nlh->nlmsg_seq;
196 struct nlmsghdr *nlh;
197 struct ndmsg *ndm;
198
199 if (dump->idx < dump->cb->args[2])
200 goto skip;
201
202 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
203 sizeof(*ndm), NLM_F_MULTI);
204 if (!nlh)
205 return -EMSGSIZE;
206
207 ndm = nlmsg_data(nlh);
208 ndm->ndm_family = AF_BRIDGE;
209 ndm->ndm_pad1 = 0;
210 ndm->ndm_pad2 = 0;
211 ndm->ndm_flags = NTF_SELF;
212 ndm->ndm_type = 0;
213 ndm->ndm_ifindex = dump->dev->ifindex;
214 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
215
216 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
217 goto nla_put_failure;
218
219 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
220 goto nla_put_failure;
221
222 nlmsg_end(dump->skb, nlh);
223
224skip:
225 dump->idx++;
226 return 0;
227
228nla_put_failure:
229 nlmsg_cancel(dump->skb, nlh);
230 return -EMSGSIZE;
231}
232
233static int
234dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
235 struct net_device *dev, struct net_device *filter_dev,
236 int *idx)
237{
d945097b 238 struct dsa_port *dp = dsa_slave_to_port(dev);
2bedde1a
AS		 239 struct dsa_slave_dump_ctx dump = {
240 .dev = dev,
241 .skb = skb,
242 .cb = cb,
243 .idx = *idx,
244 };
2bedde1a
AS		 245 int err;
246
de40fc5d 247 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
2bedde1a 248 *idx = dump.idx;
de40fc5d 249
2bedde1a
AS		 250 return err;
251}
252
91da11f8
LB		 253static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
254{
0336369d
BS		 255 struct dsa_slave_priv *p = netdev_priv(dev);
256 struct dsa_switch *ds = p->dp->ds;
257 int port = p->dp->index;
258
259 /* Pass through to switch driver if it supports timestamping */
260 switch (cmd) {
261 case SIOCGHWTSTAMP:
262 if (ds->ops->port_hwtstamp_get)
263 return ds->ops->port_hwtstamp_get(ds, port, ifr);
264 break;
265 case SIOCSHWTSTAMP:
266 if (ds->ops->port_hwtstamp_set)
267 return ds->ops->port_hwtstamp_set(ds, port, ifr);
268 break;
269 }
270
aab9c406 271 return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
91da11f8
LB		 272}
273
69bfac96 274static int dsa_slave_port_attr_set(struct net_device *dev, const void *ctx,
4c08c586
VO		 275 const struct switchdev_attr *attr,
276 struct netlink_ext_ack *extack)
35636062 277{
d945097b 278 struct dsa_port *dp = dsa_slave_to_port(dev);
b8d866ac 279 int ret;
35636062 280
0d2cfbd4
VO		 281 if (ctx && ctx != dp)
282 return 0;
283
35636062 284 switch (attr->id) {
1f868398 285 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
03cbb870
VO		 286 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
287 return -EOPNOTSUPP;
288
39f32101 289 ret = dsa_port_set_state(dp, attr->u.stp_state, true);
35636062 290 break;
fb2dabad 291 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
03cbb870
VO		 292 if (!dsa_port_offloads_bridge(dp, attr->orig_dev))
293 return -EOPNOTSUPP;
294
89153ed6
VO		 295 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
296 extack);
fb2dabad 297 break;
34a79f63 298 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
03cbb870
VO		 299 if (!dsa_port_offloads_bridge(dp, attr->orig_dev))
300 return -EOPNOTSUPP;
301
bae33f2b 302 ret = dsa_port_ageing_time(dp, attr->u.ageing_time);
34a79f63 303 break;
ea87005a 304 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
03cbb870
VO		 305 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
306 return -EOPNOTSUPP;
307
a8b659e7
VO		 308 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags,
309 extack);
ea87005a 310 break;
57652796 311 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
03cbb870
VO		 312 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
313 return -EOPNOTSUPP;
314
a8b659e7 315 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack);
57652796 316 break;
35636062
SF		 317 default:
318 ret = -EOPNOTSUPP;
319 break;
320 }
321
322 return ret;
323}
324
1ce39f0e
VO		 325/* Must be called under rcu_read_lock() */
326static int
327dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave,
328 const struct switchdev_obj_port_vlan *vlan)
329{
330 struct net_device *upper_dev;
331 struct list_head *iter;
332
333 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
334 u16 vid;
335
336 if (!is_vlan_dev(upper_dev))
337 continue;
338
339 vid = vlan_dev_vlan_id(upper_dev);
b7a9e0da 340 if (vid == vlan->vid)
1ce39f0e
VO		 341 return -EBUSY;
342 }
343
344 return 0;
345}
346
bdcff080 347static int dsa_slave_vlan_add(struct net_device *dev,
0ee2af4e
VO		 348 const struct switchdev_obj *obj,
349 struct netlink_ext_ack *extack)
bdcff080 350{
2209158c 351 struct net_device *master = dsa_slave_to_master(dev);
bdcff080
VD		 352 struct dsa_port *dp = dsa_slave_to_port(dev);
353 struct switchdev_obj_port_vlan vlan;
b7a9e0da 354 int err;
bdcff080 355
0ee2af4e
VO		 356 if (dsa_port_skip_vlan_configuration(dp)) {
357 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
c5335d73 358 return 0;
0ee2af4e 359 }
c5335d73 360
bdcff080
VD		 361 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
362
1ce39f0e
VO		 363 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with
364 * the same VID.
365 */
ffb68fc5 366 if (br_vlan_enabled(dp->bridge_dev)) {
1ce39f0e
VO		 367 rcu_read_lock();
368 err = dsa_slave_vlan_check_for_8021q_uppers(dev, &vlan);
369 rcu_read_unlock();
31046a5f
VO		 370 if (err) {
371 NL_SET_ERR_MSG_MOD(extack,
372 "Port already has a VLAN upper with this VID");
1ce39f0e 373 return err;
31046a5f 374 }
1ce39f0e
VO		 375 }
376
31046a5f 377 err = dsa_port_vlan_add(dp, &vlan, extack);
bdcff080
VD		 378 if (err)
379 return err;
380
b9499904
VD		 381 /* We need the dedicated CPU port to be a member of the VLAN as well.
382 * Even though drivers often handle CPU membership in special ways,
383 * it doesn't make sense to program a PVID, so clear this flag.
384 */
385 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID;
386
31046a5f 387 err = dsa_port_vlan_add(dp->cpu_dp, &vlan, extack);
7e1741b4
VD		 388 if (err)
389 return err;
390
b7a9e0da 391 return vlan_vid_add(master, htons(ETH_P_8021Q), vlan.vid);
bdcff080
VD		 392}
393
69bfac96 394static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx,
648b4a99 395 const struct switchdev_obj *obj,
79b139f4 396 struct netlink_ext_ack *extack)
ba14d9eb 397{
d945097b 398 struct dsa_port *dp = dsa_slave_to_port(dev);
ba14d9eb
VD		 399 int err;
400
0d2cfbd4
VO		 401 if (ctx && ctx != dp)
402 return 0;
403
9e8f4a54 404 switch (obj->id) {
8df30255 405 case SWITCHDEV_OBJ_ID_PORT_MDB:
03cbb870 406 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
79b139f4 407 return -EOPNOTSUPP;
03cbb870 408
ffb68fc5 409 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
8df30255 410 break;
5f4dbc50 411 case SWITCHDEV_OBJ_ID_HOST_MDB:
03cbb870
VO		 412 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
413 return -EOPNOTSUPP;
414
b8e997c4 415 err = dsa_port_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
5f4dbc50 416 break;
57d80838 417 case SWITCHDEV_OBJ_ID_PORT_VLAN:
03cbb870
VO		 418 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
419 return -EOPNOTSUPP;
420
0ee2af4e 421 err = dsa_slave_vlan_add(dev, obj, extack);
11149536 422 break;
c595c433 423 case SWITCHDEV_OBJ_ID_MRP:
03cbb870 424 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
c595c433 425 return -EOPNOTSUPP;
03cbb870 426
c595c433
HV		 427 err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj));
428 break;
429 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
03cbb870 430 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
c595c433 431 return -EOPNOTSUPP;
03cbb870 432
c595c433
HV		 433 err = dsa_port_mrp_add_ring_role(dp,
434 SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
435 break;
ba14d9eb
VD		 436 default:
437 err = -EOPNOTSUPP;
438 break;
439 }
440
441 return err;
442}
443
bdcff080
VD		 444static int dsa_slave_vlan_del(struct net_device *dev,
445 const struct switchdev_obj *obj)
446{
2209158c 447 struct net_device *master = dsa_slave_to_master(dev);
bdcff080 448 struct dsa_port *dp = dsa_slave_to_port(dev);
2209158c 449 struct switchdev_obj_port_vlan *vlan;
b7a9e0da 450 int err;
bdcff080 451
54a0ed0d 452 if (dsa_port_skip_vlan_configuration(dp))
c5335d73
VD		 453 return 0;
454
2209158c
VO		 455 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
456
7e1741b4
VD		 457 /* Do not deprogram the CPU port as it may be shared with other user
458 * ports which can be members of this VLAN as well.
459 */
2209158c
VO		 460 err = dsa_port_vlan_del(dp, vlan);
461 if (err)
462 return err;
463
b7a9e0da 464 vlan_vid_del(master, htons(ETH_P_8021Q), vlan->vid);
2209158c
VO		 465
466 return 0;
bdcff080
VD		 467}
468
69bfac96 469static int dsa_slave_port_obj_del(struct net_device *dev, const void *ctx,
648b4a99 470 const struct switchdev_obj *obj)
ba14d9eb 471{
d945097b 472 struct dsa_port *dp = dsa_slave_to_port(dev);
ba14d9eb
VD		 473 int err;
474
0d2cfbd4
VO		 475 if (ctx && ctx != dp)
476 return 0;
477
9e8f4a54 478 switch (obj->id) {
8df30255 479 case SWITCHDEV_OBJ_ID_PORT_MDB:
03cbb870 480 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
79b139f4 481 return -EOPNOTSUPP;
03cbb870 482
bcebb976 483 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
8df30255 484 break;
5f4dbc50 485 case SWITCHDEV_OBJ_ID_HOST_MDB:
03cbb870
VO		 486 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
487 return -EOPNOTSUPP;
488
b8e997c4 489 err = dsa_port_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
5f4dbc50 490 break;
57d80838 491 case SWITCHDEV_OBJ_ID_PORT_VLAN:
03cbb870
VO		 492 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
493 return -EOPNOTSUPP;
494
bdcff080 495 err = dsa_slave_vlan_del(dev, obj);
11149536 496 break;
c595c433 497 case SWITCHDEV_OBJ_ID_MRP:
03cbb870 498 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
c595c433 499 return -EOPNOTSUPP;
03cbb870 500
c595c433
HV		 501 err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj));
502 break;
503 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
03cbb870 504 if (!dsa_port_offloads_bridge(dp, obj->orig_dev))
c595c433 505 return -EOPNOTSUPP;
03cbb870 506
c595c433
HV		 507 err = dsa_port_mrp_del_ring_role(dp,
508 SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
509 break;
ba14d9eb
VD		 510 default:
511 err = -EOPNOTSUPP;
512 break;
513 }
514
515 return err;
516}
517
929d6c14
FF		 518static int dsa_slave_get_port_parent_id(struct net_device *dev,
519 struct netdev_phys_item_id *ppid)
b73adef6 520{
d945097b
VD		 521 struct dsa_port *dp = dsa_slave_to_port(dev);
522 struct dsa_switch *ds = dp->ds;
a42c8e33 523 struct dsa_switch_tree *dst = ds->dst;
b73adef6 524
15b04ace
JP		 525 /* For non-legacy ports, devlink is used and it takes
526 * care of the name generation. This ndo implementation
527 * should be removed with legacy support.
528 */
529 if (dp->ds->devlink)
530 return -EOPNOTSUPP;
531
929d6c14
FF		 532 ppid->id_len = sizeof(dst->index);
533 memcpy(&ppid->id, &dst->index, ppid->id_len);
534
535 return 0;
536}
537
4fa7b718
VD		 538static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
539 struct sk_buff *skb)
04ff53f9
FF		 540{
541#ifdef CONFIG_NET_POLL_CONTROLLER
4fa7b718
VD		 542 struct dsa_slave_priv *p = netdev_priv(dev);
543
f78ed220 544 return netpoll_send_skb(p->netpoll, skb);
04ff53f9
FF		 545#else
546 BUG();
04ff53f9 547 return NETDEV_TX_OK;
f78ed220 548#endif
04ff53f9
FF		 549}
550
90af1059
BS		 551static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
552 struct sk_buff *skb)
553{
554 struct dsa_switch *ds = p->dp->ds;
90af1059 555
cfd12c06
YL		 556 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
557 return;
558
90af1059
BS		 559 if (!ds->ops->port_txtstamp)
560 return;
561
5c5416f5 562 ds->ops->port_txtstamp(ds, p->dp->index, skb);
90af1059
BS		 563}
564
97a69a0d
VO		 565netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
566{
567 /* SKB for netpoll still need to be mangled with the protocol-specific
568 * tag to be successfully transmitted
569 */
570 if (unlikely(netpoll_tx_running(dev)))
571 return dsa_slave_netpoll_send_skb(dev, skb);
572
573 /* Queue the SKB for transmission on the parent interface, but
574 * do not modify its EtherType
575 */
576 skb->dev = dsa_slave_to_master(dev);
577 dev_queue_xmit(skb);
578
579 return NETDEV_TX_OK;
580}
581EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
582
a3b0b647
VO		 583static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev)
584{
585 int needed_headroom = dev->needed_headroom;
586 int needed_tailroom = dev->needed_tailroom;
587
588 /* For tail taggers, we need to pad short frames ourselves, to ensure
589 * that the tail tag does not fail at its role of being at the end of
590 * the packet, once the master interface pads the frame. Account for
591 * that pad length here, and pad later.
592 */
593 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN))
594 needed_tailroom += ETH_ZLEN - skb->len;
595 /* skb_headroom() returns unsigned int... */
596 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0);
597 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0);
598
599 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb)))
600 /* No reallocation needed, yay! */
601 return 0;
602
603 return pskb_expand_head(skb, needed_headroom, needed_tailroom,
604 GFP_ATOMIC);
605}
606
3e8a72d1
FF		 607static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
608{
609 struct dsa_slave_priv *p = netdev_priv(dev);
4ed70ce9 610 struct sk_buff *nskb;
3e8a72d1 611
6a900628 612 dev_sw_netstats_tx_add(dev, 1, skb->len);
3e8a72d1 613
c4b364ce 614 memset(skb->cb, 0, sizeof(skb->cb));
87671375 615
cf536ea3 616 /* Handle tx timestamp if any */
90af1059
BS		 617 dsa_skb_tx_timestamp(p, skb);
618
a3b0b647
VO		 619 if (dsa_realloc_skb(skb, dev)) {
620 dev_kfree_skb_any(skb);
621 return NETDEV_TX_OK;
622 }
623
624 /* needed_tailroom should still be 'warm' in the cache line from
625 * dsa_realloc_skb(), which has also ensured that padding is safe.
626 */
627 if (dev->needed_tailroom)
628 eth_skb_pad(skb);
629
fe47d563
VD		 630 /* Transmit function may have to reallocate the original SKB,
631 * in which case it must have freed it. Only free it here on error.
632 */
4ed70ce9 633 nskb = p->xmit(skb, dev);
fe47d563 634 if (!nskb) {
a68578c2 635 kfree_skb(skb);
4ed70ce9 636 return NETDEV_TX_OK;
fe47d563 637 }
5aed85ce 638
97a69a0d
VO		 639 return dsa_enqueue_skb(nskb, dev);
640}
04ff53f9 641
91da11f8 642/* ethtool operations *******************************************************/
91da11f8 643
91da11f8
LB		 644static void dsa_slave_get_drvinfo(struct net_device *dev,
645 struct ethtool_drvinfo *drvinfo)
646{
7826d43f 647 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
7826d43f
JP		 648 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
649 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
91da11f8
LB		 650}
651
3d762a0f
GR		 652static int dsa_slave_get_regs_len(struct net_device *dev)
653{
d945097b
VD		 654 struct dsa_port *dp = dsa_slave_to_port(dev);
655 struct dsa_switch *ds = dp->ds;
3d762a0f 656
9d490b4e 657 if (ds->ops->get_regs_len)
d945097b 658 return ds->ops->get_regs_len(ds, dp->index);
3d762a0f
GR		 659
660 return -EOPNOTSUPP;
661}
662
663static void
664dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
665{
d945097b
VD		 666 struct dsa_port *dp = dsa_slave_to_port(dev);
667 struct dsa_switch *ds = dp->ds;
3d762a0f 668
9d490b4e 669 if (ds->ops->get_regs)
d945097b 670 ds->ops->get_regs(ds, dp->index, regs, _p);
3d762a0f
GR		 671}
672
aab9c406
FF		 673static int dsa_slave_nway_reset(struct net_device *dev)
674{
675 struct dsa_port *dp = dsa_slave_to_port(dev);
676
677 return phylink_ethtool_nway_reset(dp->pl);
678}
679
6793abb4
GR		 680static int dsa_slave_get_eeprom_len(struct net_device *dev)
681{
d945097b
VD		 682 struct dsa_port *dp = dsa_slave_to_port(dev);
683 struct dsa_switch *ds = dp->ds;
6793abb4 684
0e576044 685 if (ds->cd && ds->cd->eeprom_len)
ff04955c 686 return ds->cd->eeprom_len;
6793abb4 687
9d490b4e
VD		 688 if (ds->ops->get_eeprom_len)
689 return ds->ops->get_eeprom_len(ds);
6793abb4
GR		 690
691 return 0;
692}
693
694static int dsa_slave_get_eeprom(struct net_device *dev,
695 struct ethtool_eeprom *eeprom, u8 *data)
696{
d945097b
VD		 697 struct dsa_port *dp = dsa_slave_to_port(dev);
698 struct dsa_switch *ds = dp->ds;
6793abb4 699
9d490b4e
VD		 700 if (ds->ops->get_eeprom)
701 return ds->ops->get_eeprom(ds, eeprom, data);
6793abb4
GR		 702
703 return -EOPNOTSUPP;
704}
705
706static int dsa_slave_set_eeprom(struct net_device *dev,
707 struct ethtool_eeprom *eeprom, u8 *data)
708{
d945097b
VD		 709 struct dsa_port *dp = dsa_slave_to_port(dev);
710 struct dsa_switch *ds = dp->ds;
6793abb4 711
9d490b4e
VD		 712 if (ds->ops->set_eeprom)
713 return ds->ops->set_eeprom(ds, eeprom, data);
6793abb4
GR		 714
715 return -EOPNOTSUPP;
716}
717
91da11f8
LB		 718static void dsa_slave_get_strings(struct net_device *dev,
719 uint32_t stringset, uint8_t *data)
720{
d945097b
VD		 721 struct dsa_port *dp = dsa_slave_to_port(dev);
722 struct dsa_switch *ds = dp->ds;
91da11f8
LB		 723
724 if (stringset == ETH_SS_STATS) {
725 int len = ETH_GSTRING_LEN;
726
727 strncpy(data, "tx_packets", len);
728 strncpy(data + len, "tx_bytes", len);
729 strncpy(data + 2 * len, "rx_packets", len);
730 strncpy(data + 3 * len, "rx_bytes", len);
9d490b4e 731 if (ds->ops->get_strings)
89f09048
FF		 732 ds->ops->get_strings(ds, dp->index, stringset,
733 data + 4 * len);
a71acad9
OR		 734 } else if (stringset == ETH_SS_TEST) {
735 net_selftest_get_strings(data);
91da11f8 736 }
a71acad9 737
91da11f8
LB		 738}
739
740static void dsa_slave_get_ethtool_stats(struct net_device *dev,
741 struct ethtool_stats *stats,
742 uint64_t *data)
743{
d945097b 744 struct dsa_port *dp = dsa_slave_to_port(dev);
d945097b 745 struct dsa_switch *ds = dp->ds;
5f6b4e14 746 struct pcpu_sw_netstats *s;
f613ed66 747 unsigned int start;
5f6b4e14
FF		 748 int i;
749
750 for_each_possible_cpu(i) {
751 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
752
6a900628 753 s = per_cpu_ptr(dev->tstats, i);
5f6b4e14
FF		 754 do {
755 start = u64_stats_fetch_begin_irq(&s->syncp);
756 tx_packets = s->tx_packets;
757 tx_bytes = s->tx_bytes;
758 rx_packets = s->rx_packets;
759 rx_bytes = s->rx_bytes;
760 } while (u64_stats_fetch_retry_irq(&s->syncp, start));
761 data[0] += tx_packets;
762 data[1] += tx_bytes;
763 data[2] += rx_packets;
764 data[3] += rx_bytes;
765 }
9d490b4e 766 if (ds->ops->get_ethtool_stats)
d945097b 767 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
91da11f8
LB		 768}
769
770static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
771{
d945097b
VD		 772 struct dsa_port *dp = dsa_slave_to_port(dev);
773 struct dsa_switch *ds = dp->ds;
91da11f8
LB		 774
775 if (sset == ETH_SS_STATS) {
b94cbc90 776 int count = 0;
91da11f8 777
b94cbc90
VO		 778 if (ds->ops->get_sset_count) {
779 count = ds->ops->get_sset_count(ds, dp->index, sset);
780 if (count < 0)
781 return count;
782 }
91da11f8 783
b94cbc90 784 return count + 4;
a71acad9
OR		 785 } else if (sset == ETH_SS_TEST) {
786 return net_selftest_get_count();
91da11f8
LB		 787 }
788
789 return -EOPNOTSUPP;
790}
791
a71acad9
OR		 792static void dsa_slave_net_selftest(struct net_device *ndev,
793 struct ethtool_test *etest, u64 *buf)
794{
795 struct dsa_port *dp = dsa_slave_to_port(ndev);
796 struct dsa_switch *ds = dp->ds;
797
798 if (ds->ops->self_test) {
799 ds->ops->self_test(ds, dp->index, etest, buf);
800 return;
801 }
802
803 net_selftest(ndev, etest, buf);
804}
805
19e57c4e
FF		 806static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
807{
d945097b
VD		 808 struct dsa_port *dp = dsa_slave_to_port(dev);
809 struct dsa_switch *ds = dp->ds;
19e57c4e 810
aab9c406
FF		 811 phylink_ethtool_get_wol(dp->pl, w);
812
9d490b4e 813 if (ds->ops->get_wol)
d945097b 814 ds->ops->get_wol(ds, dp->index, w);
19e57c4e
FF		 815}
816
817static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
818{
d945097b
VD		 819 struct dsa_port *dp = dsa_slave_to_port(dev);
820 struct dsa_switch *ds = dp->ds;
19e57c4e
FF		 821 int ret = -EOPNOTSUPP;
822
aab9c406
FF		 823 phylink_ethtool_set_wol(dp->pl, w);
824
9d490b4e 825 if (ds->ops->set_wol)
d945097b 826 ret = ds->ops->set_wol(ds, dp->index, w);
19e57c4e
FF		 827
828 return ret;
829}
830
7905288f
FF		 831static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
832{
d945097b
VD		 833 struct dsa_port *dp = dsa_slave_to_port(dev);
834 struct dsa_switch *ds = dp->ds;
7905288f
FF		 835 int ret;
836
7b9cc738 837 /* Port's PHY and MAC both need to be EEE capable */
00670cb8 838 if (!dev->phydev || !dp->pl)
7b9cc738
VD		 839 return -ENODEV;
840
08f50061 841 if (!ds->ops->set_mac_eee)
7905288f
FF		 842 return -EOPNOTSUPP;
843
d945097b 844 ret = ds->ops->set_mac_eee(ds, dp->index, e);
7905288f
FF		 845 if (ret)
846 return ret;
847
aab9c406 848 return phylink_ethtool_set_eee(dp->pl, e);
7905288f
FF		 849}
850
851static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
852{
d945097b
VD		 853 struct dsa_port *dp = dsa_slave_to_port(dev);
854 struct dsa_switch *ds = dp->ds;
7905288f
FF		 855 int ret;
856
7b9cc738 857 /* Port's PHY and MAC both need to be EEE capable */
00670cb8 858 if (!dev->phydev || !dp->pl)
7b9cc738
VD		 859 return -ENODEV;
860
08f50061 861 if (!ds->ops->get_mac_eee)
7905288f
FF		 862 return -EOPNOTSUPP;
863
d945097b 864 ret = ds->ops->get_mac_eee(ds, dp->index, e);
7905288f
FF		 865 if (ret)
866 return ret;
867
aab9c406
FF		 868 return phylink_ethtool_get_eee(dp->pl, e);
869}
870
871static int dsa_slave_get_link_ksettings(struct net_device *dev,
872 struct ethtool_link_ksettings *cmd)
873{
874 struct dsa_port *dp = dsa_slave_to_port(dev);
875
876 return phylink_ethtool_ksettings_get(dp->pl, cmd);
877}
878
879static int dsa_slave_set_link_ksettings(struct net_device *dev,
880 const struct ethtool_link_ksettings *cmd)
881{
882 struct dsa_port *dp = dsa_slave_to_port(dev);
883
884 return phylink_ethtool_ksettings_set(dp->pl, cmd);
7905288f
FF		 885}
886
a2a1a13b
HK		 887static void dsa_slave_get_pauseparam(struct net_device *dev,
888 struct ethtool_pauseparam *pause)
889{
890 struct dsa_port *dp = dsa_slave_to_port(dev);
891
892 phylink_ethtool_get_pauseparam(dp->pl, pause);
893}
894
895static int dsa_slave_set_pauseparam(struct net_device *dev,
896 struct ethtool_pauseparam *pause)
897{
898 struct dsa_port *dp = dsa_slave_to_port(dev);
899
900 return phylink_ethtool_set_pauseparam(dp->pl, pause);
901}
902
04ff53f9
FF		 903#ifdef CONFIG_NET_POLL_CONTROLLER
904static int dsa_slave_netpoll_setup(struct net_device *dev,
905 struct netpoll_info *ni)
906{
d0006b00 907 struct net_device *master = dsa_slave_to_master(dev);
04ff53f9 908 struct dsa_slave_priv *p = netdev_priv(dev);
04ff53f9
FF		 909 struct netpoll *netpoll;
910 int err = 0;
911
912 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
913 if (!netpoll)
914 return -ENOMEM;
915
916 err = __netpoll_setup(netpoll, master);
917 if (err) {
918 kfree(netpoll);
919 goto out;
920 }
921
922 p->netpoll = netpoll;
923out:
924 return err;
925}
926
927static void dsa_slave_netpoll_cleanup(struct net_device *dev)
928{
929 struct dsa_slave_priv *p = netdev_priv(dev);
930 struct netpoll *netpoll = p->netpoll;
931
932 if (!netpoll)
933 return;
934
935 p->netpoll = NULL;
936
c9fbd71f 937 __netpoll_free(netpoll);
04ff53f9
FF		 938}
939
940static void dsa_slave_poll_controller(struct net_device *dev)
941{
942}
943#endif
944
44bb765c
FF		 945static int dsa_slave_get_phys_port_name(struct net_device *dev,
946 char *name, size_t len)
947{
d945097b 948 struct dsa_port *dp = dsa_slave_to_port(dev);
44bb765c 949
d484210b
JP		 950 /* For non-legacy ports, devlink is used and it takes
951 * care of the name generation. This ndo implementation
952 * should be removed with legacy support.
953 */
954 if (dp->ds->devlink)
955 return -EOPNOTSUPP;
956
d945097b 957 if (snprintf(name, len, "p%d", dp->index) >= len)
44bb765c 958 return -EINVAL;
3a543ef4
FF		 959
960 return 0;
961}
962
f50f2127 963static struct dsa_mall_tc_entry *
4fa7b718 964dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
f50f2127 965{
4fa7b718 966 struct dsa_slave_priv *p = netdev_priv(dev);
f50f2127
FF		 967 struct dsa_mall_tc_entry *mall_tc_entry;
968
969 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
970 if (mall_tc_entry->cookie == cookie)
971 return mall_tc_entry;
972
973 return NULL;
974}
975
e13c2075
VO		 976static int
977dsa_slave_add_cls_matchall_mirred(struct net_device *dev,
978 struct tc_cls_matchall_offload *cls,
979 bool ingress)
f50f2127 980{
d945097b 981 struct dsa_port *dp = dsa_slave_to_port(dev);
f50f2127 982 struct dsa_slave_priv *p = netdev_priv(dev);
e13c2075 983 struct dsa_mall_mirror_tc_entry *mirror;
f50f2127 984 struct dsa_mall_tc_entry *mall_tc_entry;
d945097b 985 struct dsa_switch *ds = dp->ds;
9681e8b3 986 struct flow_action_entry *act;
d945097b 987 struct dsa_port *to_dp;
e13c2075
VO		 988 int err;
989
f50f2127 990 if (!ds->ops->port_mirror_add)
34297176 991 return -EOPNOTSUPP;
f50f2127 992
53eca1f3
JK		 993 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
994 cls->common.extack))
34297176 995 return -EOPNOTSUPP;
319a1d19 996
9681e8b3 997 act = &cls->rule->action.entries[0];
f50f2127 998
65722159
VO		 999 if (!act->dev)
1000 return -EINVAL;
1001
e13c2075
VO		 1002 if (!dsa_slave_dev_check(act->dev))
1003 return -EOPNOTSUPP;
f50f2127 1004
e13c2075
VO		 1005 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1006 if (!mall_tc_entry)
1007 return -ENOMEM;
f50f2127 1008
e13c2075
VO		 1009 mall_tc_entry->cookie = cls->cookie;
1010 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
1011 mirror = &mall_tc_entry->mirror;
1012
1013 to_dp = dsa_slave_to_port(act->dev);
f50f2127 1014
e13c2075
VO		 1015 mirror->to_local_port = to_dp->index;
1016 mirror->ingress = ingress;
f50f2127 1017
e13c2075
VO		 1018 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
1019 if (err) {
1020 kfree(mall_tc_entry);
1021 return err;
1022 }
f50f2127 1023
e13c2075 1024 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
f50f2127 1025
e13c2075
VO		 1026 return err;
1027}
f50f2127 1028
34297176
VO		 1029static int
1030dsa_slave_add_cls_matchall_police(struct net_device *dev,
1031 struct tc_cls_matchall_offload *cls,
1032 bool ingress)
1033{
1034 struct netlink_ext_ack *extack = cls->common.extack;
1035 struct dsa_port *dp = dsa_slave_to_port(dev);
1036 struct dsa_slave_priv *p = netdev_priv(dev);
1037 struct dsa_mall_policer_tc_entry *policer;
1038 struct dsa_mall_tc_entry *mall_tc_entry;
1039 struct dsa_switch *ds = dp->ds;
1040 struct flow_action_entry *act;
1041 int err;
1042
1043 if (!ds->ops->port_policer_add) {
1044 NL_SET_ERR_MSG_MOD(extack,
c75a33c8 1045 "Policing offload not implemented");
34297176
VO		 1046 return -EOPNOTSUPP;
1047 }
1048
1049 if (!ingress) {
1050 NL_SET_ERR_MSG_MOD(extack,
c75a33c8 1051 "Only supported on ingress qdisc");
34297176
VO		 1052 return -EOPNOTSUPP;
1053 }
1054
1055 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
1056 cls->common.extack))
1057 return -EOPNOTSUPP;
1058
1059 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) {
1060 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) {
1061 NL_SET_ERR_MSG_MOD(extack,
c75a33c8 1062 "Only one port policer allowed");
34297176
VO		 1063 return -EEXIST;
1064 }
1065 }
1066
1067 act = &cls->rule->action.entries[0];
1068
1069 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1070 if (!mall_tc_entry)
1071 return -ENOMEM;
1072
1073 mall_tc_entry->cookie = cls->cookie;
1074 mall_tc_entry->type = DSA_PORT_MALL_POLICER;
1075 policer = &mall_tc_entry->policer;
1076 policer->rate_bytes_per_sec = act->police.rate_bytes_ps;
1077 policer->burst = act->police.burst;
1078
1079 err = ds->ops->port_policer_add(ds, dp->index, policer);
1080 if (err) {
1081 kfree(mall_tc_entry);
1082 return err;
1083 }
1084
1085 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1086
1087 return err;
1088}
1089
e13c2075
VO		 1090static int dsa_slave_add_cls_matchall(struct net_device *dev,
1091 struct tc_cls_matchall_offload *cls,
1092 bool ingress)
1093{
1094 int err = -EOPNOTSUPP;
f50f2127 1095
e13c2075
VO		 1096 if (cls->common.protocol == htons(ETH_P_ALL) &&
1097 flow_offload_has_one_action(&cls->rule->action) &&
1098 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED)
1099 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress);
34297176
VO		 1100 else if (flow_offload_has_one_action(&cls->rule->action) &&
1101 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE)
1102 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress);
f50f2127 1103
e13c2075 1104 return err;
f50f2127
FF		 1105}
1106
1107static void dsa_slave_del_cls_matchall(struct net_device *dev,
1108 struct tc_cls_matchall_offload *cls)
1109{
d945097b 1110 struct dsa_port *dp = dsa_slave_to_port(dev);
f50f2127 1111 struct dsa_mall_tc_entry *mall_tc_entry;
d945097b 1112 struct dsa_switch *ds = dp->ds;
f50f2127 1113
4fa7b718 1114 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
f50f2127
FF		 1115 if (!mall_tc_entry)
1116 return;
1117
1118 list_del(&mall_tc_entry->list);
1119
1120 switch (mall_tc_entry->type) {
1121 case DSA_PORT_MALL_MIRROR:
34297176
VO		 1122 if (ds->ops->port_mirror_del)
1123 ds->ops->port_mirror_del(ds, dp->index,
1124 &mall_tc_entry->mirror);
1125 break;
1126 case DSA_PORT_MALL_POLICER:
1127 if (ds->ops->port_policer_del)
1128 ds->ops->port_policer_del(ds, dp->index);
f50f2127
FF		 1129 break;
1130 default:
1131 WARN_ON(1);
1132 }
1133
1134 kfree(mall_tc_entry);
1135}
1136
3fbae382 1137static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
6b3eb752
JP		 1138 struct tc_cls_matchall_offload *cls,
1139 bool ingress)
f50f2127 1140{
5fd9fc4e 1141 if (cls->common.chain_index)
a5fcf8a6 1142 return -EOPNOTSUPP;
f50f2127 1143
3fbae382
JP		 1144 switch (cls->command) {
1145 case TC_CLSMATCHALL_REPLACE:
5fd9fc4e 1146 return dsa_slave_add_cls_matchall(dev, cls, ingress);
3fbae382
JP		 1147 case TC_CLSMATCHALL_DESTROY:
1148 dsa_slave_del_cls_matchall(dev, cls);
1149 return 0;
1150 default:
1151 return -EOPNOTSUPP;
1152 }
1153}
1154
ed11bb1f
VO		 1155static int dsa_slave_add_cls_flower(struct net_device *dev,
1156 struct flow_cls_offload *cls,
1157 bool ingress)
1158{
1159 struct dsa_port *dp = dsa_slave_to_port(dev);
1160 struct dsa_switch *ds = dp->ds;
1161 int port = dp->index;
1162
1163 if (!ds->ops->cls_flower_add)
1164 return -EOPNOTSUPP;
1165
1166 return ds->ops->cls_flower_add(ds, port, cls, ingress);
1167}
1168
1169static int dsa_slave_del_cls_flower(struct net_device *dev,
1170 struct flow_cls_offload *cls,
1171 bool ingress)
1172{
1173 struct dsa_port *dp = dsa_slave_to_port(dev);
1174 struct dsa_switch *ds = dp->ds;
1175 int port = dp->index;
1176
1177 if (!ds->ops->cls_flower_del)
1178 return -EOPNOTSUPP;
1179
1180 return ds->ops->cls_flower_del(ds, port, cls, ingress);
1181}
1182
1183static int dsa_slave_stats_cls_flower(struct net_device *dev,
1184 struct flow_cls_offload *cls,
1185 bool ingress)
1186{
1187 struct dsa_port *dp = dsa_slave_to_port(dev);
1188 struct dsa_switch *ds = dp->ds;
1189 int port = dp->index;
1190
1191 if (!ds->ops->cls_flower_stats)
1192 return -EOPNOTSUPP;
1193
1194 return ds->ops->cls_flower_stats(ds, port, cls, ingress);
1195}
1196
1197static int dsa_slave_setup_tc_cls_flower(struct net_device *dev,
1198 struct flow_cls_offload *cls,
1199 bool ingress)
1200{
1201 switch (cls->command) {
1202 case FLOW_CLS_REPLACE:
1203 return dsa_slave_add_cls_flower(dev, cls, ingress);
1204 case FLOW_CLS_DESTROY:
1205 return dsa_slave_del_cls_flower(dev, cls, ingress);
1206 case FLOW_CLS_STATS:
1207 return dsa_slave_stats_cls_flower(dev, cls, ingress);
1208 default:
1209 return -EOPNOTSUPP;
1210 }
1211}
1212
6b3eb752
JP		 1213static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
1214 void *cb_priv, bool ingress)
1215{
1216 struct net_device *dev = cb_priv;
1217
44ae12a7
JP		 1218 if (!tc_can_offload(dev))
1219 return -EOPNOTSUPP;
1220
6b3eb752
JP		 1221 switch (type) {
1222 case TC_SETUP_CLSMATCHALL:
1223 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
ed11bb1f
VO		 1224 case TC_SETUP_CLSFLOWER:
1225 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress);
6b3eb752
JP		 1226 default:
1227 return -EOPNOTSUPP;
1228 }
1229}
1230
1231static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
1232 void *type_data, void *cb_priv)
1233{
1234 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
1235}
1236
1237static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
1238 void *type_data, void *cb_priv)
1239{
1240 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
1241}
1242
955bcb6e
PNA		 1243static LIST_HEAD(dsa_slave_block_cb_list);
1244
6b3eb752 1245static int dsa_slave_setup_tc_block(struct net_device *dev,
955bcb6e 1246 struct flow_block_offload *f)
6b3eb752 1247{
955bcb6e 1248 struct flow_block_cb *block_cb;
a7323311 1249 flow_setup_cb_t *cb;
6b3eb752 1250
32f8c409 1251 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
6b3eb752 1252 cb = dsa_slave_setup_tc_block_cb_ig;
32f8c409 1253 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
6b3eb752
JP		 1254 cb = dsa_slave_setup_tc_block_cb_eg;
1255 else
1256 return -EOPNOTSUPP;
1257
955bcb6e
PNA		 1258 f->driver_block_list = &dsa_slave_block_cb_list;
1259
6b3eb752 1260 switch (f->command) {
9c0e189e 1261 case FLOW_BLOCK_BIND:
0d4fd02e
PNA		 1262 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
1263 return -EBUSY;
1264
0c7294dd 1265 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
955bcb6e
PNA		 1266 if (IS_ERR(block_cb))
1267 return PTR_ERR(block_cb);
1268
1269 flow_block_cb_add(block_cb, f);
1270 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
1271 return 0;
9c0e189e 1272 case FLOW_BLOCK_UNBIND:
14bfb13f 1273 block_cb = flow_block_cb_lookup(f->block, cb, dev);
955bcb6e
PNA		 1274 if (!block_cb)
1275 return -ENOENT;
1276
1277 flow_block_cb_remove(block_cb, f);
1278 list_del(&block_cb->driver_list);
6b3eb752
JP		 1279 return 0;
1280 default:
1281 return -EOPNOTSUPP;
1282 }
1283}
1284
3fb24a43
PNA		 1285static int dsa_slave_setup_ft_block(struct dsa_switch *ds, int port,
1286 void *type_data)
1287{
1288 struct dsa_port *cpu_dp = dsa_to_port(ds, port)->cpu_dp;
1289 struct net_device *master = cpu_dp->master;
1290
1291 if (!master->netdev_ops->ndo_setup_tc)
1292 return -EOPNOTSUPP;
1293
1294 return master->netdev_ops->ndo_setup_tc(master, TC_SETUP_FT, type_data);
1295}
1296
3fbae382 1297static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
de4784ca 1298 void *type_data)
3fbae382 1299{
47d23af2
VO		 1300 struct dsa_port *dp = dsa_slave_to_port(dev);
1301 struct dsa_switch *ds = dp->ds;
1302
3fb24a43
PNA		 1303 switch (type) {
1304 case TC_SETUP_BLOCK:
6b3eb752 1305 return dsa_slave_setup_tc_block(dev, type_data);
3fb24a43
PNA		 1306 case TC_SETUP_FT:
1307 return dsa_slave_setup_ft_block(ds, dp->index, type_data);
1308 default:
1309 break;
1310 }
47d23af2
VO		 1311
1312 if (!ds->ops->port_setup_tc)
a5fcf8a6 1313 return -EOPNOTSUPP;
47d23af2
VO		 1314
1315 return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
f50f2127
FF		 1316}
1317
bf9f2648
FF		 1318static int dsa_slave_get_rxnfc(struct net_device *dev,
1319 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1320{
d945097b
VD		 1321 struct dsa_port *dp = dsa_slave_to_port(dev);
1322 struct dsa_switch *ds = dp->ds;
bf9f2648
FF		 1323
1324 if (!ds->ops->get_rxnfc)
1325 return -EOPNOTSUPP;
1326
d945097b 1327 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
bf9f2648
FF		 1328}
1329
1330static int dsa_slave_set_rxnfc(struct net_device *dev,
1331 struct ethtool_rxnfc *nfc)
1332{
d945097b
VD		 1333 struct dsa_port *dp = dsa_slave_to_port(dev);
1334 struct dsa_switch *ds = dp->ds;
bf9f2648
FF		 1335
1336 if (!ds->ops->set_rxnfc)
1337 return -EOPNOTSUPP;
1338
d945097b 1339 return ds->ops->set_rxnfc(ds, dp->index, nfc);
bf9f2648
FF		 1340}
1341
0336369d
BS		 1342static int dsa_slave_get_ts_info(struct net_device *dev,
1343 struct ethtool_ts_info *ts)
1344{
1345 struct dsa_slave_priv *p = netdev_priv(dev);
1346 struct dsa_switch *ds = p->dp->ds;
1347
1348 if (!ds->ops->get_ts_info)
1349 return -EOPNOTSUPP;
1350
1351 return ds->ops->get_ts_info(ds, p->dp->index, ts);
1352}
1353
061f6a50
FF		 1354static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
1355 u16 vid)
1356{
2209158c 1357 struct net_device *master = dsa_slave_to_master(dev);
061f6a50 1358 struct dsa_port *dp = dsa_slave_to_port(dev);
88236591
VO		 1359 struct switchdev_obj_port_vlan vlan = {
1360 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
b7a9e0da 1361 .vid = vid,
88236591
VO		 1362 /* This API only allows programming tagged, non-PVID VIDs */
1363 .flags = 0,
1364 };
31046a5f 1365 struct netlink_ext_ack extack = {0};
061f6a50
FF		 1366 int ret;
1367
88236591 1368 /* User port... */
31046a5f
VO		 1369 ret = dsa_port_vlan_add(dp, &vlan, &extack);
1370 if (ret) {
1371 if (extack._msg)
1372 netdev_err(dev, "%s\n", extack._msg);
cf360866 1373 return ret;
31046a5f 1374 }
cf360866 1375
88236591 1376 /* And CPU port... */
31046a5f
VO		 1377 ret = dsa_port_vlan_add(dp->cpu_dp, &vlan, &extack);
1378 if (ret) {
1379 if (extack._msg)
1380 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index,
1381 extack._msg);
7e1741b4 1382 return ret;
31046a5f 1383 }
7e1741b4 1384
2209158c 1385 return vlan_vid_add(master, proto, vid);
061f6a50
FF		 1386}
1387
1388static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
1389 u16 vid)
1390{
2209158c 1391 struct net_device *master = dsa_slave_to_master(dev);
061f6a50 1392 struct dsa_port *dp = dsa_slave_to_port(dev);
88236591 1393 struct switchdev_obj_port_vlan vlan = {
b7a9e0da 1394 .vid = vid,
88236591
VO		 1395 /* This API only allows programming tagged, non-PVID VIDs */
1396 .flags = 0,
1397 };
2209158c 1398 int err;
061f6a50 1399
7e1741b4
VD		 1400 /* Do not deprogram the CPU port as it may be shared with other user
1401 * ports which can be members of this VLAN as well.
1402 */
2209158c
VO		 1403 err = dsa_port_vlan_del(dp, &vlan);
1404 if (err)
1405 return err;
1406
1407 vlan_vid_del(master, proto, vid);
1408
1409 return 0;
061f6a50
FF		 1410}
1411
bff33f7e
VO		 1412struct dsa_hw_port {
1413 struct list_head list;
1414 struct net_device *dev;
1415 int old_mtu;
1416};
1417
1418static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu)
1419{
1420 const struct dsa_hw_port *p;
1421 int err;
1422
1423 list_for_each_entry(p, hw_port_list, list) {
1424 if (p->dev->mtu == mtu)
1425 continue;
1426
1427 err = dev_set_mtu(p->dev, mtu);
1428 if (err)
1429 goto rollback;
1430 }
1431
1432 return 0;
1433
1434rollback:
1435 list_for_each_entry_continue_reverse(p, hw_port_list, list) {
1436 if (p->dev->mtu == p->old_mtu)
1437 continue;
1438
1439 if (dev_set_mtu(p->dev, p->old_mtu))
1440 netdev_err(p->dev, "Failed to restore MTU\n");
1441 }
1442
1443 return err;
1444}
1445
1446static void dsa_hw_port_list_free(struct list_head *hw_port_list)
1447{
1448 struct dsa_hw_port *p, *n;
1449
1450 list_for_each_entry_safe(p, n, hw_port_list, list)
1451 kfree(p);
1452}
1453
1454/* Make the hardware datapath to/from @dev limited to a common MTU */
bf88dc32 1455static void dsa_bridge_mtu_normalization(struct dsa_port *dp)
bff33f7e
VO		 1456{
1457 struct list_head hw_port_list;
1458 struct dsa_switch_tree *dst;
1459 int min_mtu = ETH_MAX_MTU;
1460 struct dsa_port *other_dp;
1461 int err;
1462
1463 if (!dp->ds->mtu_enforcement_ingress)
1464 return;
1465
1466 if (!dp->bridge_dev)
1467 return;
1468
1469 INIT_LIST_HEAD(&hw_port_list);
1470
1471 /* Populate the list of ports that are part of the same bridge
1472 * as the newly added/modified port
1473 */
1474 list_for_each_entry(dst, &dsa_tree_list, list) {
1475 list_for_each_entry(other_dp, &dst->ports, list) {
1476 struct dsa_hw_port *hw_port;
1477 struct net_device *slave;
1478
1479 if (other_dp->type != DSA_PORT_TYPE_USER)
1480 continue;
1481
1482 if (other_dp->bridge_dev != dp->bridge_dev)
1483 continue;
1484
1485 if (!other_dp->ds->mtu_enforcement_ingress)
1486 continue;
1487
1488 slave = other_dp->slave;
1489
1490 if (min_mtu > slave->mtu)
1491 min_mtu = slave->mtu;
1492
1493 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL);
1494 if (!hw_port)
1495 goto out;
1496
1497 hw_port->dev = slave;
1498 hw_port->old_mtu = slave->mtu;
1499
1500 list_add(&hw_port->list, &hw_port_list);
1501 }
1502 }
1503
1504 /* Attempt to configure the entire hardware bridge to the newly added
1505 * interface's MTU first, regardless of whether the intention of the
1506 * user was to raise or lower it.
1507 */
1508 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu);
1509 if (!err)
1510 goto out;
1511
1512 /* Clearly that didn't work out so well, so just set the minimum MTU on
1513 * all hardware bridge ports now. If this fails too, then all ports will
1514 * still have their old MTU rolled back anyway.
1515 */
1516 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu);
1517
1518out:
1519 dsa_hw_port_list_free(&hw_port_list);
1520}
1521
53da0eba 1522int dsa_slave_change_mtu(struct net_device *dev, int new_mtu)
bfcb8132
VO		 1523{
1524 struct net_device *master = dsa_slave_to_master(dev);
1525 struct dsa_port *dp = dsa_slave_to_port(dev);
1526 struct dsa_slave_priv *p = netdev_priv(dev);
1527 struct dsa_switch *ds = p->dp->ds;
4e4ab795 1528 struct dsa_port *dp_iter;
bfcb8132
VO		 1529 struct dsa_port *cpu_dp;
1530 int port = p->dp->index;
1531 int largest_mtu = 0;
1532 int new_master_mtu;
1533 int old_master_mtu;
1534 int mtu_limit;
1535 int cpu_mtu;
4e4ab795 1536 int err;
bfcb8132
VO		 1537
1538 if (!ds->ops->port_change_mtu)
1539 return -EOPNOTSUPP;
1540
4e4ab795 1541 list_for_each_entry(dp_iter, &ds->dst->ports, list) {
bfcb8132
VO		 1542 int slave_mtu;
1543
4e4ab795 1544 if (!dsa_port_is_user(dp_iter))
bfcb8132
VO		 1545 continue;
1546
1547 /* During probe, this function will be called for each slave
1548 * device, while not all of them have been allocated. That's
1549 * ok, it doesn't change what the maximum is, so ignore it.
1550 */
4e4ab795 1551 if (!dp_iter->slave)
bfcb8132
VO		 1552 continue;
1553
1554 /* Pretend that we already applied the setting, which we
1555 * actually haven't (still haven't done all integrity checks)
1556 */
4e4ab795 1557 if (dp_iter == dp)
bfcb8132
VO		 1558 slave_mtu = new_mtu;
1559 else
4e4ab795 1560 slave_mtu = dp_iter->slave->mtu;
bfcb8132
VO		 1561
1562 if (largest_mtu < slave_mtu)
1563 largest_mtu = slave_mtu;
1564 }
1565
1566 cpu_dp = dsa_to_port(ds, port)->cpu_dp;
1567
1568 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu);
1569 old_master_mtu = master->mtu;
4e500251 1570 new_master_mtu = largest_mtu + dsa_tag_protocol_overhead(cpu_dp->tag_ops);
bfcb8132
VO		 1571 if (new_master_mtu > mtu_limit)
1572 return -ERANGE;
1573
1574 /* If the master MTU isn't over limit, there's no need to check the CPU
1575 * MTU, since that surely isn't either.
1576 */
1577 cpu_mtu = largest_mtu;
1578
1579 /* Start applying stuff */
1580 if (new_master_mtu != old_master_mtu) {
1581 err = dev_set_mtu(master, new_master_mtu);
1582 if (err < 0)
1583 goto out_master_failed;
1584
1585 /* We only need to propagate the MTU of the CPU port to
88faba20
VO		 1586 * upstream switches, so create a non-targeted notifier which
1587 * updates all switches.
bfcb8132 1588 */
88faba20 1589 err = dsa_port_mtu_change(cpu_dp, cpu_mtu, false);
bfcb8132
VO		 1590 if (err)
1591 goto out_cpu_failed;
1592 }
1593
88faba20 1594 err = dsa_port_mtu_change(dp, new_mtu, true);
bfcb8132
VO		 1595 if (err)
1596 goto out_port_failed;
1597
1598 dev->mtu = new_mtu;
1599
bff33f7e
VO		 1600 dsa_bridge_mtu_normalization(dp);
1601
bfcb8132
VO		 1602 return 0;
1603
1604out_port_failed:
1605 if (new_master_mtu != old_master_mtu)
1606 dsa_port_mtu_change(cpu_dp, old_master_mtu -
4e500251 1607 dsa_tag_protocol_overhead(cpu_dp->tag_ops),
88faba20 1608 false);
bfcb8132
VO		 1609out_cpu_failed:
1610 if (new_master_mtu != old_master_mtu)
1611 dev_set_mtu(master, old_master_mtu);
1612out_master_failed:
1613 return err;
1614}
1615
91da11f8 1616static const struct ethtool_ops dsa_slave_ethtool_ops = {
91da11f8 1617 .get_drvinfo = dsa_slave_get_drvinfo,
3d762a0f
GR		 1618 .get_regs_len = dsa_slave_get_regs_len,
1619 .get_regs = dsa_slave_get_regs,
aab9c406 1620 .nway_reset = dsa_slave_nway_reset,
c4aef9fc 1621 .get_link = ethtool_op_get_link,
6793abb4
GR		 1622 .get_eeprom_len = dsa_slave_get_eeprom_len,
1623 .get_eeprom = dsa_slave_get_eeprom,
1624 .set_eeprom = dsa_slave_set_eeprom,
91da11f8
LB		 1625 .get_strings = dsa_slave_get_strings,
1626 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
1627 .get_sset_count = dsa_slave_get_sset_count,
19e57c4e
FF		 1628 .set_wol = dsa_slave_set_wol,
1629 .get_wol = dsa_slave_get_wol,
7905288f
FF		 1630 .set_eee = dsa_slave_set_eee,
1631 .get_eee = dsa_slave_get_eee,
aab9c406
FF		 1632 .get_link_ksettings = dsa_slave_get_link_ksettings,
1633 .set_link_ksettings = dsa_slave_set_link_ksettings,
a2a1a13b
HK		 1634 .get_pauseparam = dsa_slave_get_pauseparam,
1635 .set_pauseparam = dsa_slave_set_pauseparam,
bf9f2648
FF		 1636 .get_rxnfc = dsa_slave_get_rxnfc,
1637 .set_rxnfc = dsa_slave_set_rxnfc,
0336369d 1638 .get_ts_info = dsa_slave_get_ts_info,
a71acad9 1639 .self_test = dsa_slave_net_selftest,
91da11f8
LB		 1640};
1641
716efee2
JP		 1642static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
1643{
1644 struct dsa_port *dp = dsa_slave_to_port(dev);
1645
1646 return dp->ds->devlink ? &dp->devlink_port : NULL;
1647}
1648
c2ec5f2e
OR		 1649static void dsa_slave_get_stats64(struct net_device *dev,
1650 struct rtnl_link_stats64 *s)
1651{
1652 struct dsa_port *dp = dsa_slave_to_port(dev);
1653 struct dsa_switch *ds = dp->ds;
1654
1655 if (ds->ops->get_stats64)
1656 ds->ops->get_stats64(ds, dp->index, s);
1657 else
1658 dev_get_tstats64(dev, s);
1659}
1660
0994d492
FF		 1661static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx,
1662 struct net_device_path *path)
1663{
1664 struct dsa_port *dp = dsa_slave_to_port(ctx->dev);
1665 struct dsa_port *cpu_dp = dp->cpu_dp;
1666
1667 path->dev = ctx->dev;
1668 path->type = DEV_PATH_DSA;
1669 path->dsa.proto = cpu_dp->tag_ops->proto;
1670 path->dsa.port = dp->index;
1671 ctx->dev = cpu_dp->master;
1672
1673 return 0;
1674}
1675
3e8a72d1 1676static const struct net_device_ops dsa_slave_netdev_ops = {
d442ad4a
SH		 1677 .ndo_open = dsa_slave_open,
1678 .ndo_stop = dsa_slave_close,
3e8a72d1 1679 .ndo_start_xmit = dsa_slave_xmit,
d442ad4a
SH		 1680 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
1681 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
d442ad4a 1682 .ndo_set_mac_address = dsa_slave_set_mac_address,
2bedde1a 1683 .ndo_fdb_dump = dsa_slave_fdb_dump,
a7605370 1684 .ndo_eth_ioctl = dsa_slave_ioctl,
abd2be00 1685 .ndo_get_iflink = dsa_slave_get_iflink,
04ff53f9
FF		 1686#ifdef CONFIG_NET_POLL_CONTROLLER
1687 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
1688 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
1689 .ndo_poll_controller = dsa_slave_poll_controller,
1690#endif
44bb765c 1691 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
f50f2127 1692 .ndo_setup_tc = dsa_slave_setup_tc,
c2ec5f2e 1693 .ndo_get_stats64 = dsa_slave_get_stats64,
929d6c14 1694 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
061f6a50
FF		 1695 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
1696 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
716efee2 1697 .ndo_get_devlink_port = dsa_slave_get_devlink_port,
bfcb8132 1698 .ndo_change_mtu = dsa_slave_change_mtu,
0994d492 1699 .ndo_fill_forward_path = dsa_slave_fill_forward_path,
98237d43
SF		 1700};
1701
f37db85d
FF		 1702static struct device_type dsa_type = {
1703 .name = "dsa",
1704};
1705
aab9c406
FF		 1706void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
1707{
1708 const struct dsa_port *dp = dsa_to_port(ds, port);
1709
765bda93
RK		 1710 if (dp->pl)
1711 phylink_mac_change(dp->pl, up);
aab9c406
FF		 1712}
1713EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
1714
5c05c1db 1715static void dsa_slave_phylink_fixed_state(struct phylink_config *config,
aab9c406
FF		 1716 struct phylink_link_state *state)
1717{
5c05c1db 1718 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
aab9c406
FF		 1719 struct dsa_switch *ds = dp->ds;
1720
1721 /* No need to check that this operation is valid, the callback would
1722 * not be called if it was not.
1723 */
1724 ds->ops->phylink_fixed_state(ds, dp->index, state);
ce31b31c
FF		 1725}
1726
91da11f8 1727/* slave device setup *******************************************************/
c916e8e1
OR		 1728static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr,
1729 u32 flags)
c305c165 1730{
d945097b 1731 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
d945097b 1732 struct dsa_switch *ds = dp->ds;
c305c165 1733
0115dcd1
VD		 1734 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
1735 if (!slave_dev->phydev) {
d25b8e74 1736 netdev_err(slave_dev, "no phy at %d\n", addr);
c305c165 1737 return -ENODEV;
d25b8e74 1738 }
c305c165 1739
c916e8e1
OR		 1740 slave_dev->phydev->dev_flags |= flags;
1741
aab9c406 1742 return phylink_connect_phy(dp->pl, slave_dev->phydev);
11d8f3dd 1743}
11d8f3dd 1744
4fa7b718 1745static int dsa_slave_phy_setup(struct net_device *slave_dev)
0d8bcdd3 1746{
d945097b 1747 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
d945097b
VD		 1748 struct device_node *port_dn = dp->dn;
1749 struct dsa_switch *ds = dp->ds;
0c65b2b9 1750 phy_interface_t mode;
6819563e 1751 u32 phy_flags = 0;
0c65b2b9 1752 int ret;
0d8bcdd3 1753
0c65b2b9
AL		 1754 ret = of_get_phy_mode(port_dn, &mode);
1755 if (ret)
19334920 1756 mode = PHY_INTERFACE_MODE_NA;
0d8bcdd3 1757
44cc27e4
IC		 1758 dp->pl_config.dev = &slave_dev->dev;
1759 dp->pl_config.type = PHYLINK_NETDEV;
1760
5c05c1db
RK		 1761 /* The get_fixed_state callback takes precedence over polling the
1762 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set
1763 * this if the switch provides such a callback.
1764 */
1765 if (ds->ops->phylink_fixed_state) {
1766 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state;
1767 dp->pl_config.poll_fixed_state = true;
1768 }
1769
44cc27e4 1770 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
77373d49 1771 &dsa_port_phylink_mac_ops);
aab9c406
FF		 1772 if (IS_ERR(dp->pl)) {
1773 netdev_err(slave_dev,
1774 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
1775 return PTR_ERR(dp->pl);
0d8bcdd3
FF		 1776 }
1777
9d490b4e 1778 if (ds->ops->get_phy_flags)
d945097b 1779 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
6819563e 1780
aab9c406 1781 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
6146dd45
VO		 1782 if (ret == -ENODEV && ds->slave_mii_bus) {
1783 /* We could not connect to a designated PHY or SFP, so try to
1784 * use the switch internal MDIO bus instead
aab9c406 1785 */
c916e8e1 1786 ret = dsa_slave_phy_connect(slave_dev, dp->index, phy_flags);
d25b8e74 1787 if (ret) {
aab9c406
FF		 1788 netdev_err(slave_dev,
1789 "failed to connect to port %d: %d\n",
d945097b 1790 dp->index, ret);
aab9c406 1791 phylink_destroy(dp->pl);
c305c165 1792 return ret;
d25b8e74 1793 }
b31f65fb 1794 }
9697f1cd 1795
6146dd45 1796 return ret;
0d8bcdd3
FF		 1797}
1798
53da0eba
VO		 1799void dsa_slave_setup_tagger(struct net_device *slave)
1800{
1801 struct dsa_port *dp = dsa_slave_to_port(slave);
1802 struct dsa_slave_priv *p = netdev_priv(slave);
1803 const struct dsa_port *cpu_dp = dp->cpu_dp;
1804 struct net_device *master = cpu_dp->master;
21cf377a 1805 const struct dsa_switch *ds = dp->ds;
53da0eba 1806
4e500251
VO		 1807 slave->needed_headroom = cpu_dp->tag_ops->needed_headroom;
1808 slave->needed_tailroom = cpu_dp->tag_ops->needed_tailroom;
53da0eba
VO		 1809 /* Try to save one extra realloc later in the TX path (in the master)
1810 * by also inheriting the master's needed headroom and tailroom.
1811 * The 8021q driver also does this.
1812 */
1813 slave->needed_headroom += master->needed_headroom;
1814 slave->needed_tailroom += master->needed_tailroom;
1815
1816 p->xmit = cpu_dp->tag_ops->xmit;
21cf377a
LS		 1817
1818 slave->features = master->vlan_features | NETIF_F_HW_TC;
1819 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del)
1820 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1821 slave->hw_features |= NETIF_F_HW_TC;
1822 slave->features |= NETIF_F_LLTX;
1823 if (slave->needed_tailroom)
1824 slave->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST);
53da0eba
VO		 1825}
1826
1a33e10e
CW		 1827static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1828static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1829 struct netdev_queue *txq,
1830 void *_unused)
1831{
1832 lockdep_set_class(&txq->_xmit_lock,
1833 &dsa_slave_netdev_xmit_lock_key);
1834}
1835
24462549
FF		 1836int dsa_slave_suspend(struct net_device *slave_dev)
1837{
aab9c406 1838 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
24462549 1839
a94c689e
FF		 1840 if (!netif_running(slave_dev))
1841 return 0;
1842
f154be24
FF		 1843 netif_device_detach(slave_dev);
1844
aab9c406
FF		 1845 rtnl_lock();
1846 phylink_stop(dp->pl);
1847 rtnl_unlock();
24462549
FF		 1848
1849 return 0;
1850}
1851
1852int dsa_slave_resume(struct net_device *slave_dev)
1853{
aab9c406
FF		 1854 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
1855
a94c689e
FF		 1856 if (!netif_running(slave_dev))
1857 return 0;
1858
24462549
FF		 1859 netif_device_attach(slave_dev);
1860
aab9c406
FF		 1861 rtnl_lock();
1862 phylink_start(dp->pl);
1863 rtnl_unlock();
24462549
FF		 1864
1865 return 0;
1866}
1867
951259aa 1868int dsa_slave_create(struct dsa_port *port)
91da11f8 1869{
24a9332a 1870 const struct dsa_port *cpu_dp = port->cpu_dp;
f8b8b1cd 1871 struct net_device *master = cpu_dp->master;
4cfbf09c 1872 struct dsa_switch *ds = port->ds;
951259aa 1873 const char *name = port->name;
91da11f8
LB		 1874 struct net_device *slave_dev;
1875 struct dsa_slave_priv *p;
1876 int ret;
1877
55199df6
FF		 1878 if (!ds->num_tx_queues)
1879 ds->num_tx_queues = 1;
1880
1881 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
1882 NET_NAME_UNKNOWN, ether_setup,
1883 ds->num_tx_queues, 1);
91da11f8 1884 if (slave_dev == NULL)
d87d6f44 1885 return -ENOMEM;
91da11f8 1886
7ad24ea4 1887 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
83216e39 1888 if (!is_zero_ether_addr(port->mac))
a2c7023f
XS		 1889 ether_addr_copy(slave_dev->dev_addr, port->mac);
1890 else
1891 eth_hw_addr_inherit(slave_dev, master);
0a5f107b 1892 slave_dev->priv_flags |= IFF_NO_QUEUE;
3e8a72d1 1893 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
bfcb8132
VO		 1894 if (ds->ops->port_max_mtu)
1895 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index);
f37db85d 1896 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
d442ad4a 1897
1a33e10e
CW		 1898 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1899 NULL);
1900
4cfbf09c
VD		 1901 SET_NETDEV_DEV(slave_dev, port->ds->dev);
1902 slave_dev->dev.of_node = port->dn;
5075314e
AD		 1903 slave_dev->vlan_features = master->vlan_features;
1904
1905 p = netdev_priv(slave_dev);
6a900628
HK		 1906 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1907 if (!slave_dev->tstats) {
5f6b4e14
FF		 1908 free_netdev(slave_dev);
1909 return -ENOMEM;
1910 }
e131a563
AL		 1911
1912 ret = gro_cells_init(&p->gcells, slave_dev);
1913 if (ret)
1914 goto out_free;
1915
4cfbf09c 1916 p->dp = port;
f50f2127 1917 INIT_LIST_HEAD(&p->mall_tc_list);
f8b8b1cd 1918 port->slave = slave_dev;
53da0eba 1919 dsa_slave_setup_tagger(slave_dev);
91da11f8 1920
bfcb8132
VO		 1921 rtnl_lock();
1922 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN);
1923 rtnl_unlock();
4349abdb 1924 if (ret && ret != -EOPNOTSUPP)
bdc40a3f
RV		 1925 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n",
1926 ret, ETH_DATA_LEN, port->index);
bfcb8132 1927
91da11f8
LB		 1928 netif_carrier_off(slave_dev);
1929
4fa7b718 1930 ret = dsa_slave_phy_setup(slave_dev);
0071f56e 1931 if (ret) {
c9ebf126
VO		 1932 netdev_err(slave_dev,
1933 "error %d setting up PHY for tree %d, switch %d, port %d\n",
1934 ret, ds->dst->index, ds->index, port->index);
e131a563 1935 goto out_gcells;
e804441c
FF		 1936 }
1937
2f1e8ea7
VO		 1938 rtnl_lock();
1939
1940 ret = register_netdevice(slave_dev);
e804441c
FF		 1941 if (ret) {
1942 netdev_err(master, "error %d registering interface %s\n",
1943 ret, slave_dev->name);
2f1e8ea7 1944 rtnl_unlock();
e804441c 1945 goto out_phy;
0071f56e
AL		 1946 }
1947
2f1e8ea7
VO		 1948 ret = netdev_upper_dev_link(master, slave_dev, NULL);
1949
1950 rtnl_unlock();
1951
1952 if (ret)
1953 goto out_unregister;
1954
d87d6f44 1955 return 0;
e804441c 1956
2f1e8ea7
VO		 1957out_unregister:
1958 unregister_netdev(slave_dev);
e804441c 1959out_phy:
aab9c406
FF		 1960 rtnl_lock();
1961 phylink_disconnect_phy(p->dp->pl);
1962 rtnl_unlock();
1963 phylink_destroy(p->dp->pl);
e131a563
AL		 1964out_gcells:
1965 gro_cells_destroy(&p->gcells);
e804441c 1966out_free:
6a900628 1967 free_percpu(slave_dev->tstats);
e804441c 1968 free_netdev(slave_dev);
f8b8b1cd 1969 port->slave = NULL;
e804441c 1970 return ret;
91da11f8 1971}
b73adef6 1972
cda5c15b
NA		 1973void dsa_slave_destroy(struct net_device *slave_dev)
1974{
2f1e8ea7 1975 struct net_device *master = dsa_slave_to_master(slave_dev);
d945097b 1976 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
cda5c15b
NA		 1977 struct dsa_slave_priv *p = netdev_priv(slave_dev);
1978
1979 netif_carrier_off(slave_dev);
aab9c406 1980 rtnl_lock();
2f1e8ea7
VO		 1981 netdev_upper_dev_unlink(master, slave_dev);
1982 unregister_netdevice(slave_dev);
aab9c406
FF		 1983 phylink_disconnect_phy(dp->pl);
1984 rtnl_unlock();
881eadab 1985
aab9c406 1986 phylink_destroy(dp->pl);
e131a563 1987 gro_cells_destroy(&p->gcells);
6a900628 1988 free_percpu(slave_dev->tstats);
cda5c15b
NA		 1989 free_netdev(slave_dev);
1990}
1991
4d776482 1992bool dsa_slave_dev_check(const struct net_device *dev)
b73adef6
FF		 1993{
1994 return dev->netdev_ops == &dsa_slave_netdev_ops;
1995}
a5e3c9ba 1996EXPORT_SYMBOL_GPL(dsa_slave_dev_check);
b73adef6 1997
8e92ab3a
VD		 1998static int dsa_slave_changeupper(struct net_device *dev,
1999 struct netdev_notifier_changeupper_info *info)
b73adef6 2000{
d945097b 2001 struct dsa_port *dp = dsa_slave_to_port(dev);
2afc526a 2002 struct netlink_ext_ack *extack;
8e92ab3a 2003 int err = NOTIFY_DONE;
b73adef6 2004
2afc526a
VO		 2005 extack = netdev_notifier_info_to_extack(&info->info);
2006
8e92ab3a
VD		 2007 if (netif_is_bridge_master(info->upper_dev)) {
2008 if (info->linking) {
2afc526a 2009 err = dsa_port_bridge_join(dp, info->upper_dev, extack);
bff33f7e
VO		 2010 if (!err)
2011 dsa_bridge_mtu_normalization(dp);
8e92ab3a
VD		 2012 err = notifier_from_errno(err);
2013 } else {
17d7802b 2014 dsa_port_bridge_leave(dp, info->upper_dev);
8e92ab3a 2015 err = NOTIFY_OK;
6debb68a 2016 }
058102a6
TW		 2017 } else if (netif_is_lag_master(info->upper_dev)) {
2018 if (info->linking) {
2019 err = dsa_port_lag_join(dp, info->upper_dev,
2afc526a 2020 info->upper_info, extack);
058102a6
TW		 2021 if (err == -EOPNOTSUPP) {
2022 NL_SET_ERR_MSG_MOD(info->info.extack,
2023 "Offloading not supported");
2024 err = 0;
2025 }
2026 err = notifier_from_errno(err);
2027 } else {
2028 dsa_port_lag_leave(dp, info->upper_dev);
2029 err = NOTIFY_OK;
2030 }
18596f50
GM		 2031 } else if (is_hsr_master(info->upper_dev)) {
2032 if (info->linking) {
2033 err = dsa_port_hsr_join(dp, info->upper_dev);
2034 if (err == -EOPNOTSUPP) {
2035 NL_SET_ERR_MSG_MOD(info->info.extack,
2036 "Offloading not supported");
2037 err = 0;
2038 }
2039 err = notifier_from_errno(err);
2040 } else {
2041 dsa_port_hsr_leave(dp, info->upper_dev);
2042 err = NOTIFY_OK;
2043 }
058102a6
TW		 2044 }
2045
2046 return err;
2047}
2048
74918945
VO		 2049static int dsa_slave_prechangeupper(struct net_device *dev,
2050 struct netdev_notifier_changeupper_info *info)
2051{
2052 struct dsa_port *dp = dsa_slave_to_port(dev);
74918945
VO		 2053
2054 if (netif_is_bridge_master(info->upper_dev) && !info->linking)
4e51bf44 2055 dsa_port_pre_bridge_leave(dp, info->upper_dev);
74918945 2056 else if (netif_is_lag_master(info->upper_dev) && !info->linking)
4e51bf44 2057 dsa_port_pre_lag_leave(dp, info->upper_dev);
74918945
VO		 2058 /* dsa_port_pre_hsr_leave is not yet necessary since hsr cannot be
2059 * meaningfully enslaved to a bridge yet
2060 */
2061
4e51bf44 2062 return NOTIFY_DONE;
74918945
VO		 2063}
2064
058102a6
TW		 2065static int
2066dsa_slave_lag_changeupper(struct net_device *dev,
2067 struct netdev_notifier_changeupper_info *info)
2068{
2069 struct net_device *lower;
2070 struct list_head *iter;
2071 int err = NOTIFY_DONE;
2072 struct dsa_port *dp;
2073
2074 netdev_for_each_lower_dev(dev, lower, iter) {
2075 if (!dsa_slave_dev_check(lower))
2076 continue;
2077
2078 dp = dsa_slave_to_port(lower);
2079 if (!dp->lag_dev)
2080 /* Software LAG */
2081 continue;
2082
2083 err = dsa_slave_changeupper(lower, info);
2084 if (notifier_to_errno(err))
2085 break;
6debb68a 2086 }
b73adef6 2087
8e92ab3a 2088 return err;
6debb68a 2089}
b73adef6 2090
74918945
VO		 2091/* Same as dsa_slave_lag_changeupper() except that it calls
2092 * dsa_slave_prechangeupper()
2093 */
2094static int
2095dsa_slave_lag_prechangeupper(struct net_device *dev,
2096 struct netdev_notifier_changeupper_info *info)
2097{
2098 struct net_device *lower;
2099 struct list_head *iter;
2100 int err = NOTIFY_DONE;
2101 struct dsa_port *dp;
2102
2103 netdev_for_each_lower_dev(dev, lower, iter) {
2104 if (!dsa_slave_dev_check(lower))
2105 continue;
2106
2107 dp = dsa_slave_to_port(lower);
2108 if (!dp->lag_dev)
2109 /* Software LAG */
2110 continue;
2111
2112 err = dsa_slave_prechangeupper(lower, info);
2113 if (notifier_to_errno(err))
2114 break;
2115 }
2116
2117 return err;
2118}
2119
eb46e8da
VO		 2120static int
2121dsa_prevent_bridging_8021q_upper(struct net_device *dev,
2122 struct netdev_notifier_changeupper_info *info)
cc1d5bda
FF		 2123{
2124 struct netlink_ext_ack *ext_ack;
2125 struct net_device *slave;
2126 struct dsa_port *dp;
2127
2128 ext_ack = netdev_notifier_info_to_extack(&info->info);
2129
2130 if (!is_vlan_dev(dev))
2131 return NOTIFY_DONE;
2132
2133 slave = vlan_dev_real_dev(dev);
2134 if (!dsa_slave_dev_check(slave))
2135 return NOTIFY_DONE;
2136
2137 dp = dsa_slave_to_port(slave);
2138 if (!dp->bridge_dev)
2139 return NOTIFY_DONE;
2140
2141 /* Deny enslaving a VLAN device into a VLAN-aware bridge */
2142 if (br_vlan_enabled(dp->bridge_dev) &&
2143 netif_is_bridge_master(info->upper_dev) && info->linking) {
2144 NL_SET_ERR_MSG_MOD(ext_ack,
2145 "Cannot enslave VLAN device into VLAN aware bridge");
2146 return notifier_from_errno(-EINVAL);
2147 }
2148
2149 return NOTIFY_DONE;
2150}
2151
2b138406
VO		 2152static int
2153dsa_slave_check_8021q_upper(struct net_device *dev,
2154 struct netdev_notifier_changeupper_info *info)
2155{
2156 struct dsa_port *dp = dsa_slave_to_port(dev);
2157 struct net_device *br = dp->bridge_dev;
2158 struct bridge_vlan_info br_info;
2159 struct netlink_ext_ack *extack;
2160 int err = NOTIFY_DONE;
2161 u16 vid;
2162
adb256eb 2163 if (!br || !br_vlan_enabled(br))
2b138406
VO		 2164 return NOTIFY_DONE;
2165
2166 extack = netdev_notifier_info_to_extack(&info->info);
2167 vid = vlan_dev_vlan_id(info->upper_dev);
2168
2169 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
2170 * device, respectively the VID is not found, returning
2171 * 0 means success, which is a failure for us here.
2172 */
2173 err = br_vlan_get_info(br, vid, &br_info);
2174 if (err == 0) {
2175 NL_SET_ERR_MSG_MOD(extack,
2176 "This VLAN is already configured by the bridge");
2177 return notifier_from_errno(-EBUSY);
2178 }
2179
2180 return NOTIFY_DONE;
2181}
2182
4ede74e7
VO		 2183static int
2184dsa_slave_prechangeupper_sanity_check(struct net_device *dev,
2185 struct netdev_notifier_changeupper_info *info)
2186{
2187 struct dsa_switch *ds;
2188 struct dsa_port *dp;
2189 int err;
2190
2191 if (!dsa_slave_dev_check(dev))
2192 return dsa_prevent_bridging_8021q_upper(dev, info);
2193
2194 dp = dsa_slave_to_port(dev);
2195 ds = dp->ds;
2196
2197 if (ds->ops->port_prechangeupper) {
2198 err = ds->ops->port_prechangeupper(ds, dp->index, info);
2199 if (err)
2200 return notifier_from_errno(err);
2201 }
2202
2203 if (is_vlan_dev(info->upper_dev))
2204 return dsa_slave_check_8021q_upper(dev, info);
2205
2206 return NOTIFY_DONE;
2207}
2208
88e4f0ca
VD		 2209static int dsa_slave_netdevice_event(struct notifier_block *nb,
2210 unsigned long event, void *ptr)
6debb68a
VD		 2211{
2212 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2213
83501299 2214 switch (event) {
2b138406
VO		 2215 case NETDEV_PRECHANGEUPPER: {
2216 struct netdev_notifier_changeupper_info *info = ptr;
e358bef7 2217 int err;
2b138406 2218
4ede74e7
VO		 2219 err = dsa_slave_prechangeupper_sanity_check(dev, info);
2220 if (err != NOTIFY_DONE)
2221 return err;
e358bef7 2222
74918945
VO		 2223 if (dsa_slave_dev_check(dev))
2224 return dsa_slave_prechangeupper(dev, ptr);
2225
2226 if (netif_is_lag_master(dev))
2227 return dsa_slave_lag_prechangeupper(dev, ptr);
2228
83501299 2229 break;
2b138406 2230 }
83501299 2231 case NETDEV_CHANGEUPPER:
058102a6
TW		 2232 if (dsa_slave_dev_check(dev))
2233 return dsa_slave_changeupper(dev, ptr);
2234
2235 if (netif_is_lag_master(dev))
2236 return dsa_slave_lag_changeupper(dev, ptr);
2237
2238 break;
2239 case NETDEV_CHANGELOWERSTATE: {
2240 struct netdev_notifier_changelowerstate_info *info = ptr;
2241 struct dsa_port *dp;
2242 int err;
2243
83501299 2244 if (!dsa_slave_dev_check(dev))
058102a6 2245 break;
8e92ab3a 2246
058102a6
TW		 2247 dp = dsa_slave_to_port(dev);
2248
2249 err = dsa_port_lag_change(dp, info->lower_state_info);
2250 return notifier_from_errno(err);
2251 }
c0a8a9c2
VO		 2252 case NETDEV_GOING_DOWN: {
2253 struct dsa_port *dp, *cpu_dp;
2254 struct dsa_switch_tree *dst;
2255 LIST_HEAD(close_list);
2256
2257 if (!netdev_uses_dsa(dev))
2258 return NOTIFY_DONE;
2259
2260 cpu_dp = dev->dsa_ptr;
2261 dst = cpu_dp->ds->dst;
2262
2263 list_for_each_entry(dp, &dst->ports, list) {
2264 if (!dsa_is_user_port(dp->ds, dp->index))
2265 continue;
2266
2267 list_add(&dp->slave->close_list, &close_list);
2268 }
2269
2270 dev_close_many(&close_list, true);
2271
2272 return NOTIFY_OK;
2273 }
2274 default:
2275 break;
cc1d5bda 2276 }
b73adef6 2277
b73adef6
FF		 2278 return NOTIFY_DONE;
2279}
88e4f0ca 2280
c4bb76a9
VO		 2281static void
2282dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work)
2283{
2284 struct dsa_switch *ds = switchdev_work->ds;
2285 struct switchdev_notifier_fdb_info info;
2286 struct dsa_port *dp;
2287
2288 if (!dsa_is_user_port(ds, switchdev_work->port))
2289 return;
2290
2291 info.addr = switchdev_work->addr;
2292 info.vid = switchdev_work->vid;
2293 info.offloaded = true;
2294 dp = dsa_to_port(ds, switchdev_work->port);
2295 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2296 dp->slave, &info.info, NULL);
2297}
c9eb3e0f
AS		 2298
2299static void dsa_slave_switchdev_event_work(struct work_struct *work)
2300{
2301 struct dsa_switchdev_event_work *switchdev_work =
2302 container_of(work, struct dsa_switchdev_event_work, work);
c4bb76a9
VO		 2303 struct dsa_switch *ds = switchdev_work->ds;
2304 struct dsa_port *dp;
c9eb3e0f
AS		 2305 int err;
2306
c4bb76a9
VO		 2307 dp = dsa_to_port(ds, switchdev_work->port);
2308
c9eb3e0f
AS		 2309 rtnl_lock();
2310 switch (switchdev_work->event) {
2311 case SWITCHDEV_FDB_ADD_TO_DEVICE:
3dc80afc
VO		 2312 if (switchdev_work->host_addr)
2313 err = dsa_port_host_fdb_add(dp, switchdev_work->addr,
2314 switchdev_work->vid);
2315 else
2316 err = dsa_port_fdb_add(dp, switchdev_work->addr,
2317 switchdev_work->vid);
c9eb3e0f 2318 if (err) {
c4bb76a9
VO		 2319 dev_err(ds->dev,
2320 "port %d failed to add %pM vid %d to fdb: %d\n",
2321 dp->index, switchdev_work->addr,
2322 switchdev_work->vid, err);
c9eb3e0f
AS		 2323 break;
2324 }
c4bb76a9 2325 dsa_fdb_offload_notify(switchdev_work);
c9eb3e0f
AS		 2326 break;
2327
2328 case SWITCHDEV_FDB_DEL_TO_DEVICE:
3dc80afc
VO		 2329 if (switchdev_work->host_addr)
2330 err = dsa_port_host_fdb_del(dp, switchdev_work->addr,
2331 switchdev_work->vid);
2332 else
2333 err = dsa_port_fdb_del(dp, switchdev_work->addr,
2334 switchdev_work->vid);
c9eb3e0f 2335 if (err) {
c4bb76a9
VO		 2336 dev_err(ds->dev,
2337 "port %d failed to delete %pM vid %d from fdb: %d\n",
2338 dp->index, switchdev_work->addr,
2339 switchdev_work->vid, err);
c9eb3e0f 2340 }
2fd18650 2341
c9eb3e0f
AS		 2342 break;
2343 }
2344 rtnl_unlock();
2345
4bed397c 2346 dev_put(switchdev_work->dev);
c9eb3e0f 2347 kfree(switchdev_work);
c9eb3e0f
AS		 2348}
2349
b94dc99c
VO		 2350static bool dsa_foreign_dev_check(const struct net_device *dev,
2351 const struct net_device *foreign_dev)
d5f19486 2352{
b94dc99c
VO		 2353 const struct dsa_port *dp = dsa_slave_to_port(dev);
2354 struct dsa_switch_tree *dst = dp->ds->dst;
d5f19486 2355
b94dc99c
VO		 2356 if (netif_is_bridge_master(foreign_dev))
2357 return !dsa_tree_offloads_bridge(dst, foreign_dev);
2358
2359 if (netif_is_bridge_port(foreign_dev))
2360 return !dsa_tree_offloads_bridge_port(dst, foreign_dev);
2361
2362 /* Everything else is foreign */
2363 return true;
d5f19486
VO		 2364}
2365
b94dc99c
VO		 2366static int dsa_slave_fdb_event(struct net_device *dev,
2367 const struct net_device *orig_dev,
2368 const void *ctx,
2369 const struct switchdev_notifier_fdb_info *fdb_info,
2370 unsigned long event)
d5f19486 2371{
b94dc99c
VO		 2372 struct dsa_switchdev_event_work *switchdev_work;
2373 struct dsa_port *dp = dsa_slave_to_port(dev);
2374 bool host_addr = fdb_info->is_local;
2375 struct dsa_switch *ds = dp->ds;
2376
2377 if (ctx && ctx != dp)
2378 return 0;
2379
2380 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del)
2381 return -EOPNOTSUPP;
2382
2383 if (dsa_slave_dev_check(orig_dev) &&
2384 switchdev_fdb_is_dynamically_learned(fdb_info))
2385 return 0;
2386
2387 /* FDB entries learned by the software bridge should be installed as
2388 * host addresses only if the driver requests assisted learning.
2389 */
2390 if (switchdev_fdb_is_dynamically_learned(fdb_info) &&
2391 !ds->assisted_learning_on_cpu_port)
2392 return 0;
2393
2394 /* Also treat FDB entries on foreign interfaces bridged with us as host
2395 * addresses.
2396 */
2397 if (dsa_foreign_dev_check(dev, orig_dev))
2398 host_addr = true;
2399
2400 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2401 if (!switchdev_work)
2402 return -ENOMEM;
2403
2404 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n",
2405 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting",
2406 orig_dev->name, fdb_info->addr, fdb_info->vid,
2407 host_addr ? " as host address" : "");
d5f19486 2408
b94dc99c
VO		 2409 INIT_WORK(&switchdev_work->work, dsa_slave_switchdev_event_work);
2410 switchdev_work->ds = ds;
2411 switchdev_work->port = dp->index;
2412 switchdev_work->event = event;
2413 switchdev_work->dev = dev;
d5f19486 2414
b94dc99c
VO		 2415 ether_addr_copy(switchdev_work->addr, fdb_info->addr);
2416 switchdev_work->vid = fdb_info->vid;
2417 switchdev_work->host_addr = host_addr;
2418
2419 /* Hold a reference for dsa_fdb_offload_notify */
2420 dev_hold(dev);
2421 dsa_schedule_work(&switchdev_work->work);
2422
2423 return 0;
2424}
2425
2426static int
2427dsa_slave_fdb_add_to_device(struct net_device *dev,
2428 const struct net_device *orig_dev, const void *ctx,
2429 const struct switchdev_notifier_fdb_info *fdb_info)
2430{
2431 return dsa_slave_fdb_event(dev, orig_dev, ctx, fdb_info,
2432 SWITCHDEV_FDB_ADD_TO_DEVICE);
2433}
2434
2435static int
2436dsa_slave_fdb_del_to_device(struct net_device *dev,
2437 const struct net_device *orig_dev, const void *ctx,
2438 const struct switchdev_notifier_fdb_info *fdb_info)
2439{
2440 return dsa_slave_fdb_event(dev, orig_dev, ctx, fdb_info,
2441 SWITCHDEV_FDB_DEL_TO_DEVICE);
d5f19486
VO		 2442}
2443
c9eb3e0f
AS		 2444/* Called under rcu_read_lock() */
2445static int dsa_slave_switchdev_event(struct notifier_block *unused,
2446 unsigned long event, void *ptr)
2447{
2448 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
79b139f4
VD		 2449 int err;
2450
447d290a
VO		 2451 switch (event) {
2452 case SWITCHDEV_PORT_ATTR_SET:
79b139f4
VD		 2453 err = switchdev_handle_port_attr_set(dev, ptr,
2454 dsa_slave_dev_check,
2455 dsa_slave_port_attr_set);
2456 return notifier_from_errno(err);
447d290a 2457 case SWITCHDEV_FDB_ADD_TO_DEVICE:
b94dc99c
VO		 2458 err = switchdev_handle_fdb_add_to_device(dev, ptr,
2459 dsa_slave_dev_check,
2460 dsa_foreign_dev_check,
2461 dsa_slave_fdb_add_to_device,
2462 NULL);
2463 return notifier_from_errno(err);
447d290a 2464 case SWITCHDEV_FDB_DEL_TO_DEVICE:
b94dc99c
VO		 2465 err = switchdev_handle_fdb_del_to_device(dev, ptr,
2466 dsa_slave_dev_check,
2467 dsa_foreign_dev_check,
2468 dsa_slave_fdb_del_to_device,
2469 NULL);
2470 return notifier_from_errno(err);
c9eb3e0f 2471 default:
c9eb3e0f
AS		 2472 return NOTIFY_DONE;
2473 }
2474
c9eb3e0f 2475 return NOTIFY_OK;
c9eb3e0f
AS		 2476}
2477
2b239f67
PM		 2478static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
2479 unsigned long event, void *ptr)
2480{
2481 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
79b139f4 2482 int err;
2b239f67
PM		 2483
2484 switch (event) {
79b139f4
VD		 2485 case SWITCHDEV_PORT_OBJ_ADD:
2486 err = switchdev_handle_port_obj_add(dev, ptr,
2487 dsa_slave_dev_check,
2488 dsa_slave_port_obj_add);
2489 return notifier_from_errno(err);
2b239f67 2490 case SWITCHDEV_PORT_OBJ_DEL:
79b139f4
VD		 2491 err = switchdev_handle_port_obj_del(dev, ptr,
2492 dsa_slave_dev_check,
2493 dsa_slave_port_obj_del);
2494 return notifier_from_errno(err);
9ed1eced 2495 case SWITCHDEV_PORT_ATTR_SET:
79b139f4
VD		 2496 err = switchdev_handle_port_attr_set(dev, ptr,
2497 dsa_slave_dev_check,
2498 dsa_slave_port_attr_set);
2499 return notifier_from_errno(err);
2b239f67
PM		 2500 }
2501
2502 return NOTIFY_DONE;
2503}
2504
88e4f0ca 2505static struct notifier_block dsa_slave_nb __read_mostly = {
c9eb3e0f
AS		 2506 .notifier_call = dsa_slave_netdevice_event,
2507};
2508
010e269f 2509struct notifier_block dsa_slave_switchdev_notifier = {
c9eb3e0f 2510 .notifier_call = dsa_slave_switchdev_event,
88e4f0ca
VD		 2511};
2512
010e269f 2513struct notifier_block dsa_slave_switchdev_blocking_notifier = {
2b239f67
PM		 2514 .notifier_call = dsa_slave_switchdev_blocking_event,
2515};
2516
88e4f0ca
VD		 2517int dsa_slave_register_notifier(void)
2518{
2b239f67 2519 struct notifier_block *nb;
c9eb3e0f
AS		 2520 int err;
2521
2522 err = register_netdevice_notifier(&dsa_slave_nb);
2523 if (err)
2524 return err;
2525
2526 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
2527 if (err)
2528 goto err_switchdev_nb;
2529
2b239f67
PM		 2530 nb = &dsa_slave_switchdev_blocking_notifier;
2531 err = register_switchdev_blocking_notifier(nb);
2532 if (err)
2533 goto err_switchdev_blocking_nb;
2534
c9eb3e0f
AS		 2535 return 0;
2536
2b239f67
PM		 2537err_switchdev_blocking_nb:
2538 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
c9eb3e0f
AS		 2539err_switchdev_nb:
2540 unregister_netdevice_notifier(&dsa_slave_nb);
2541 return err;
88e4f0ca
VD		 2542}
2543
2544void dsa_slave_unregister_notifier(void)
2545{
2b239f67 2546 struct notifier_block *nb;
88e4f0ca
VD		 2547 int err;
2548
2b239f67
PM		 2549 nb = &dsa_slave_switchdev_blocking_notifier;
2550 err = unregister_switchdev_blocking_notifier(nb);
2551 if (err)
2552 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
2553
c9eb3e0f
AS		 2554 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
2555 if (err)
2556 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
2557
88e4f0ca
VD		 2558 err = unregister_netdevice_notifier(&dsa_slave_nb);
2559 if (err)
2560 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
2561}
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