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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Texas Instruments switchdev Driver
4 *
5 * Copyright (C) 2019 Texas Instruments
6 *
7 */
8
9#include <linux/etherdevice.h>
10#include <linux/if_bridge.h>
11#include <linux/netdevice.h>
12#include <linux/workqueue.h>
13#include <net/switchdev.h>
14
15#include "cpsw.h"
16#include "cpsw_ale.h"
17#include "cpsw_priv.h"
18#include "cpsw_switchdev.h"
19
20struct cpsw_switchdev_event_work {
21 struct work_struct work;
22 struct switchdev_notifier_fdb_info fdb_info;
23 struct cpsw_priv *priv;
24 unsigned long event;
25};
26
27static int cpsw_port_stp_state_set(struct cpsw_priv *priv,
28 struct switchdev_trans *trans, u8 state)
29{
30 struct cpsw_common *cpsw = priv->cpsw;
31 u8 cpsw_state;
32 int ret = 0;
33
34 if (switchdev_trans_ph_prepare(trans))
35 return 0;
36
37 switch (state) {
38 case BR_STATE_FORWARDING:
39 cpsw_state = ALE_PORT_STATE_FORWARD;
40 break;
41 case BR_STATE_LEARNING:
42 cpsw_state = ALE_PORT_STATE_LEARN;
43 break;
44 case BR_STATE_DISABLED:
45 cpsw_state = ALE_PORT_STATE_DISABLE;
46 break;
47 case BR_STATE_LISTENING:
48 case BR_STATE_BLOCKING:
49 cpsw_state = ALE_PORT_STATE_BLOCK;
50 break;
51 default:
52 return -EOPNOTSUPP;
53 }
54
55 ret = cpsw_ale_control_set(cpsw->ale, priv->emac_port,
56 ALE_PORT_STATE, cpsw_state);
57 dev_dbg(priv->dev, "ale state: %u\n", cpsw_state);
58
59 return ret;
60}
61
62static int cpsw_port_attr_br_flags_set(struct cpsw_priv *priv,
63 struct switchdev_trans *trans,
64 struct net_device *orig_dev,
65 unsigned long brport_flags)
66{
67 struct cpsw_common *cpsw = priv->cpsw;
68 bool unreg_mcast_add = false;
69
70 if (switchdev_trans_ph_prepare(trans))
71 return 0;
72
73 if (brport_flags & BR_MCAST_FLOOD)
74 unreg_mcast_add = true;
75 dev_dbg(priv->dev, "BR_MCAST_FLOOD: %d port %u\n",
76 unreg_mcast_add, priv->emac_port);
77
78 cpsw_ale_set_unreg_mcast(cpsw->ale, BIT(priv->emac_port),
79 unreg_mcast_add);
80
81 return 0;
82}
83
84static int cpsw_port_attr_br_flags_pre_set(struct net_device *netdev,
85 struct switchdev_trans *trans,
86 unsigned long flags)
87{
88 if (flags & ~(BR_LEARNING | BR_MCAST_FLOOD))
89 return -EINVAL;
90
91 return 0;
92}
93
94static int cpsw_port_attr_set(struct net_device *ndev,
95 const struct switchdev_attr *attr,
96 struct switchdev_trans *trans)
97{
98 struct cpsw_priv *priv = netdev_priv(ndev);
99 int ret;
100
101 dev_dbg(priv->dev, "attr: id %u port: %u\n", attr->id, priv->emac_port);
102
103 switch (attr->id) {
104 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
105 ret = cpsw_port_attr_br_flags_pre_set(ndev, trans,
106 attr->u.brport_flags);
107 break;
108 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
109 ret = cpsw_port_stp_state_set(priv, trans, attr->u.stp_state);
110 dev_dbg(priv->dev, "stp state: %u\n", attr->u.stp_state);
111 break;
112 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
113 ret = cpsw_port_attr_br_flags_set(priv, trans, attr->orig_dev,
114 attr->u.brport_flags);
115 break;
116 default:
117 ret = -EOPNOTSUPP;
118 break;
119 }
120
121 return ret;
122}
123
124static u16 cpsw_get_pvid(struct cpsw_priv *priv)
125{
126 struct cpsw_common *cpsw = priv->cpsw;
127 u32 __iomem *port_vlan_reg;
128 u32 pvid;
129
130 if (priv->emac_port) {
131 int reg = CPSW2_PORT_VLAN;
132
133 if (cpsw->version == CPSW_VERSION_1)
134 reg = CPSW1_PORT_VLAN;
135 pvid = slave_read(cpsw->slaves + (priv->emac_port - 1), reg);
136 } else {
137 port_vlan_reg = &cpsw->host_port_regs->port_vlan;
138 pvid = readl(port_vlan_reg);
139 }
140
141 pvid = pvid & 0xfff;
142
143 return pvid;
144}
145
146static void cpsw_set_pvid(struct cpsw_priv *priv, u16 vid, bool cfi, u32 cos)
147{
148 struct cpsw_common *cpsw = priv->cpsw;
149 void __iomem *port_vlan_reg;
150 u32 pvid;
151
152 pvid = vid;
153 pvid |= cfi ? BIT(12) : 0;
154 pvid |= (cos & 0x7) << 13;
155
156 if (priv->emac_port) {
157 int reg = CPSW2_PORT_VLAN;
158
159 if (cpsw->version == CPSW_VERSION_1)
160 reg = CPSW1_PORT_VLAN;
161 /* no barrier */
162 slave_write(cpsw->slaves + (priv->emac_port - 1), pvid, reg);
163 } else {
164 /* CPU port */
165 port_vlan_reg = &cpsw->host_port_regs->port_vlan;
166 writel(pvid, port_vlan_reg);
167 }
168}
169
170static int cpsw_port_vlan_add(struct cpsw_priv *priv, bool untag, bool pvid,
171 u16 vid, struct net_device *orig_dev)
172{
173 bool cpu_port = netif_is_bridge_master(orig_dev);
174 struct cpsw_common *cpsw = priv->cpsw;
175 int unreg_mcast_mask = 0;
176 int reg_mcast_mask = 0;
177 int untag_mask = 0;
178 int port_mask;
179 int ret = 0;
180 u32 flags;
181
182 if (cpu_port) {
183 port_mask = BIT(HOST_PORT_NUM);
184 flags = orig_dev->flags;
185 unreg_mcast_mask = port_mask;
186 } else {
187 port_mask = BIT(priv->emac_port);
188 flags = priv->ndev->flags;
189 }
190
191 if (flags & IFF_MULTICAST)
192 reg_mcast_mask = port_mask;
193
194 if (untag)
195 untag_mask = port_mask;
196
197 ret = cpsw_ale_vlan_add_modify(cpsw->ale, vid, port_mask, untag_mask,
198 reg_mcast_mask, unreg_mcast_mask);
199 if (ret) {
200 dev_err(priv->dev, "Unable to add vlan\n");
201 return ret;
202 }
203
204 if (cpu_port)
205 cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
206 HOST_PORT_NUM, ALE_VLAN, vid);
207 if (!pvid)
208 return ret;
209
210 cpsw_set_pvid(priv, vid, 0, 0);
211
212 dev_dbg(priv->dev, "VID add: %s: vid:%u ports:%X\n",
213 priv->ndev->name, vid, port_mask);
214 return ret;
215}
216
217static int cpsw_port_vlan_del(struct cpsw_priv *priv, u16 vid,
218 struct net_device *orig_dev)
219{
220 bool cpu_port = netif_is_bridge_master(orig_dev);
221 struct cpsw_common *cpsw = priv->cpsw;
222 int port_mask;
223 int ret = 0;
224
225 if (cpu_port)
226 port_mask = BIT(HOST_PORT_NUM);
227 else
228 port_mask = BIT(priv->emac_port);
229
230 ret = cpsw_ale_del_vlan(cpsw->ale, vid, port_mask);
231 if (ret != 0)
232 return ret;
233
234 /* We don't care for the return value here, error is returned only if
235 * the unicast entry is not present
236 */
237 if (cpu_port)
238 cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
239 HOST_PORT_NUM, ALE_VLAN, vid);
240
241 if (vid == cpsw_get_pvid(priv))
242 cpsw_set_pvid(priv, 0, 0, 0);
243
244 /* We don't care for the return value here, error is returned only if
245 * the multicast entry is not present
246 */
247 cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
248 port_mask, ALE_VLAN, vid);
249 dev_dbg(priv->dev, "VID del: %s: vid:%u ports:%X\n",
250 priv->ndev->name, vid, port_mask);
251
252 return ret;
253}
254
255static int cpsw_port_vlans_add(struct cpsw_priv *priv,
256 const struct switchdev_obj_port_vlan *vlan,
257 struct switchdev_trans *trans)
258{
259 bool untag = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
260 struct net_device *orig_dev = vlan->obj.orig_dev;
261 bool cpu_port = netif_is_bridge_master(orig_dev);
262 bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
263 u16 vid;
264
265 dev_dbg(priv->dev, "VID add: %s: vid:%u flags:%X\n",
266 priv->ndev->name, vlan->vid_begin, vlan->flags);
267
268 if (cpu_port && !(vlan->flags & BRIDGE_VLAN_INFO_BRENTRY))
269 return 0;
270
271 if (switchdev_trans_ph_prepare(trans))
272 return 0;
273
274 for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) {
275 int err;
276
277 err = cpsw_port_vlan_add(priv, untag, pvid, vid, orig_dev);
278 if (err)
279 return err;
280 }
281
282 return 0;
283}
284
285static int cpsw_port_vlans_del(struct cpsw_priv *priv,
286 const struct switchdev_obj_port_vlan *vlan)
287
288{
289 struct net_device *orig_dev = vlan->obj.orig_dev;
290 u16 vid;
291
292 for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) {
293 int err;
294
295 err = cpsw_port_vlan_del(priv, vid, orig_dev);
296 if (err)
297 return err;
298 }
299
300 return 0;
301}
302
303static int cpsw_port_mdb_add(struct cpsw_priv *priv,
304 struct switchdev_obj_port_mdb *mdb,
305 struct switchdev_trans *trans)
306
307{
308 struct net_device *orig_dev = mdb->obj.orig_dev;
309 bool cpu_port = netif_is_bridge_master(orig_dev);
310 struct cpsw_common *cpsw = priv->cpsw;
311 int port_mask;
312 int err;
313
314 if (switchdev_trans_ph_prepare(trans))
315 return 0;
316
317 if (cpu_port)
318 port_mask = BIT(HOST_PORT_NUM);
319 else
320 port_mask = BIT(priv->emac_port);
321
322 err = cpsw_ale_add_mcast(cpsw->ale, mdb->addr, port_mask,
323 ALE_VLAN, mdb->vid, 0);
324 dev_dbg(priv->dev, "MDB add: %s: vid %u:%pM ports: %X\n",
325 priv->ndev->name, mdb->vid, mdb->addr, port_mask);
326
327 return err;
328}
329
330static int cpsw_port_mdb_del(struct cpsw_priv *priv,
331 struct switchdev_obj_port_mdb *mdb)
332
333{
334 struct net_device *orig_dev = mdb->obj.orig_dev;
335 bool cpu_port = netif_is_bridge_master(orig_dev);
336 struct cpsw_common *cpsw = priv->cpsw;
337 int del_mask;
338 int err;
339
340 if (cpu_port)
341 del_mask = BIT(HOST_PORT_NUM);
342 else
343 del_mask = BIT(priv->emac_port);
344
345 err = cpsw_ale_del_mcast(cpsw->ale, mdb->addr, del_mask,
346 ALE_VLAN, mdb->vid);
347 dev_dbg(priv->dev, "MDB del: %s: vid %u:%pM ports: %X\n",
348 priv->ndev->name, mdb->vid, mdb->addr, del_mask);
349
350 return err;
351}
352
353static int cpsw_port_obj_add(struct net_device *ndev,
354 const struct switchdev_obj *obj,
355 struct switchdev_trans *trans,
356 struct netlink_ext_ack *extack)
357{
358 struct switchdev_obj_port_vlan *vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
359 struct switchdev_obj_port_mdb *mdb = SWITCHDEV_OBJ_PORT_MDB(obj);
360 struct cpsw_priv *priv = netdev_priv(ndev);
361 int err = 0;
362
363 dev_dbg(priv->dev, "obj_add: id %u port: %u\n",
364 obj->id, priv->emac_port);
365
366 switch (obj->id) {
367 case SWITCHDEV_OBJ_ID_PORT_VLAN:
368 err = cpsw_port_vlans_add(priv, vlan, trans);
369 break;
370 case SWITCHDEV_OBJ_ID_PORT_MDB:
371 case SWITCHDEV_OBJ_ID_HOST_MDB:
372 err = cpsw_port_mdb_add(priv, mdb, trans);
373 break;
374 default:
375 err = -EOPNOTSUPP;
376 break;
377 }
378
379 return err;
380}
381
382static int cpsw_port_obj_del(struct net_device *ndev,
383 const struct switchdev_obj *obj)
384{
385 struct switchdev_obj_port_vlan *vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
386 struct switchdev_obj_port_mdb *mdb = SWITCHDEV_OBJ_PORT_MDB(obj);
387 struct cpsw_priv *priv = netdev_priv(ndev);
388 int err = 0;
389
390 dev_dbg(priv->dev, "obj_del: id %u port: %u\n",
391 obj->id, priv->emac_port);
392
393 switch (obj->id) {
394 case SWITCHDEV_OBJ_ID_PORT_VLAN:
395 err = cpsw_port_vlans_del(priv, vlan);
396 break;
397 case SWITCHDEV_OBJ_ID_PORT_MDB:
398 case SWITCHDEV_OBJ_ID_HOST_MDB:
399 err = cpsw_port_mdb_del(priv, mdb);
400 break;
401 default:
402 err = -EOPNOTSUPP;
403 break;
404 }
405
406 return err;
407}
408
409static void cpsw_fdb_offload_notify(struct net_device *ndev,
410 struct switchdev_notifier_fdb_info *rcv)
411{
412 struct switchdev_notifier_fdb_info info;
413
414 info.addr = rcv->addr;
415 info.vid = rcv->vid;
416 info.offloaded = true;
417 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
418 ndev, &info.info, NULL);
419}
420
421static void cpsw_switchdev_event_work(struct work_struct *work)
422{
423 struct cpsw_switchdev_event_work *switchdev_work =
424 container_of(work, struct cpsw_switchdev_event_work, work);
425 struct cpsw_priv *priv = switchdev_work->priv;
426 struct switchdev_notifier_fdb_info *fdb;
427 struct cpsw_common *cpsw = priv->cpsw;
428 int port = priv->emac_port;
429
430 rtnl_lock();
431 switch (switchdev_work->event) {
432 case SWITCHDEV_FDB_ADD_TO_DEVICE:
433 fdb = &switchdev_work->fdb_info;
434
435 dev_dbg(cpsw->dev, "cpsw_fdb_add: MACID = %pM vid = %u flags = %u %u -- port %d\n",
436 fdb->addr, fdb->vid, fdb->added_by_user,
437 fdb->offloaded, port);
438
439 if (!fdb->added_by_user)
440 break;
441 if (memcmp(priv->mac_addr, (u8 *)fdb->addr, ETH_ALEN) == 0)
442 port = HOST_PORT_NUM;
443
444 cpsw_ale_add_ucast(cpsw->ale, (u8 *)fdb->addr, port,
445 fdb->vid ? ALE_VLAN : 0, fdb->vid);
446 cpsw_fdb_offload_notify(priv->ndev, fdb);
447 break;
448 case SWITCHDEV_FDB_DEL_TO_DEVICE:
449 fdb = &switchdev_work->fdb_info;
450
451 dev_dbg(cpsw->dev, "cpsw_fdb_del: MACID = %pM vid = %u flags = %u %u -- port %d\n",
452 fdb->addr, fdb->vid, fdb->added_by_user,
453 fdb->offloaded, port);
454
455 if (!fdb->added_by_user)
456 break;
457 if (memcmp(priv->mac_addr, (u8 *)fdb->addr, ETH_ALEN) == 0)
458 port = HOST_PORT_NUM;
459
460 cpsw_ale_del_ucast(cpsw->ale, (u8 *)fdb->addr, port,
461 fdb->vid ? ALE_VLAN : 0, fdb->vid);
462 break;
463 default:
464 break;
465 }
466 rtnl_unlock();
467
468 kfree(switchdev_work->fdb_info.addr);
469 kfree(switchdev_work);
470 dev_put(priv->ndev);
471}
472
473/* called under rcu_read_lock() */
474static int cpsw_switchdev_event(struct notifier_block *unused,
475 unsigned long event, void *ptr)
476{
477 struct net_device *ndev = switchdev_notifier_info_to_dev(ptr);
478 struct switchdev_notifier_fdb_info *fdb_info = ptr;
479 struct cpsw_switchdev_event_work *switchdev_work;
480 struct cpsw_priv *priv = netdev_priv(ndev);
481 int err;
482
483 if (event == SWITCHDEV_PORT_ATTR_SET) {
484 err = switchdev_handle_port_attr_set(ndev, ptr,
485 cpsw_port_dev_check,
486 cpsw_port_attr_set);
487 return notifier_from_errno(err);
488 }
489
490 if (!cpsw_port_dev_check(ndev))
491 return NOTIFY_DONE;
492
493 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
494 if (WARN_ON(!switchdev_work))
495 return NOTIFY_BAD;
496
497 INIT_WORK(&switchdev_work->work, cpsw_switchdev_event_work);
498 switchdev_work->priv = priv;
499 switchdev_work->event = event;
500
501 switch (event) {
502 case SWITCHDEV_FDB_ADD_TO_DEVICE:
503 case SWITCHDEV_FDB_DEL_TO_DEVICE:
504 memcpy(&switchdev_work->fdb_info, ptr,
505 sizeof(switchdev_work->fdb_info));
506 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
507 if (!switchdev_work->fdb_info.addr)
508 goto err_addr_alloc;
509 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
510 fdb_info->addr);
511 dev_hold(ndev);
512 break;
513 default:
514 kfree(switchdev_work);
515 return NOTIFY_DONE;
516 }
517
518 queue_work(system_long_wq, &switchdev_work->work);
519
520 return NOTIFY_DONE;
521
522err_addr_alloc:
523 kfree(switchdev_work);
524 return NOTIFY_BAD;
525}
526
527static struct notifier_block cpsw_switchdev_notifier = {
528 .notifier_call = cpsw_switchdev_event,
529};
530
531static int cpsw_switchdev_blocking_event(struct notifier_block *unused,
532 unsigned long event, void *ptr)
533{
534 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
535 int err;
536
537 switch (event) {
538 case SWITCHDEV_PORT_OBJ_ADD:
539 err = switchdev_handle_port_obj_add(dev, ptr,
540 cpsw_port_dev_check,
541 cpsw_port_obj_add);
542 return notifier_from_errno(err);
543 case SWITCHDEV_PORT_OBJ_DEL:
544 err = switchdev_handle_port_obj_del(dev, ptr,
545 cpsw_port_dev_check,
546 cpsw_port_obj_del);
547 return notifier_from_errno(err);
548 case SWITCHDEV_PORT_ATTR_SET:
549 err = switchdev_handle_port_attr_set(dev, ptr,
550 cpsw_port_dev_check,
551 cpsw_port_attr_set);
552 return notifier_from_errno(err);
553 default:
554 break;
555 }
556
557 return NOTIFY_DONE;
558}
559
560static struct notifier_block cpsw_switchdev_bl_notifier = {
561 .notifier_call = cpsw_switchdev_blocking_event,
562};
563
564int cpsw_switchdev_register_notifiers(struct cpsw_common *cpsw)
565{
566 int ret = 0;
567
568 ret = register_switchdev_notifier(&cpsw_switchdev_notifier);
569 if (ret) {
570 dev_err(cpsw->dev, "register switchdev notifier fail ret:%d\n",
571 ret);
572 return ret;
573 }
574
575 ret = register_switchdev_blocking_notifier(&cpsw_switchdev_bl_notifier);
576 if (ret) {
577 dev_err(cpsw->dev, "register switchdev blocking notifier ret:%d\n",
578 ret);
579 unregister_switchdev_notifier(&cpsw_switchdev_notifier);
580 }
581
582 return ret;
583}
584
585void cpsw_switchdev_unregister_notifiers(struct cpsw_common *cpsw)
586{
587 unregister_switchdev_blocking_notifier(&cpsw_switchdev_bl_notifier);
588 unregister_switchdev_notifier(&cpsw_switchdev_notifier);
589}