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4e6d7136f0aa799564b727c5f0f3879bbc6c0e90
[openwrt/staging/yousong.git] / target / linux / generic / files / drivers / net / phy / swconfig.c
1 /*
2 * swconfig.c: Switch configuration API
3 *
4 * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16
17 #include <linux/types.h>
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/list.h>
21 #include <linux/if.h>
22 #include <linux/if_ether.h>
23 #include <linux/capability.h>
24 #include <linux/skbuff.h>
25 #include <linux/switch.h>
26 #include <linux/of.h>
27
28 //#define DEBUG 1
29 #ifdef DEBUG
30 #define DPRINTF(format, ...) printk("%s: " format, __func__, ##__VA_ARGS__)
31 #else
32 #define DPRINTF(...) do {} while(0)
33 #endif
34
35 #define SWCONFIG_DEVNAME "switch%d"
36
37 #include "swconfig_leds.c"
38
39 MODULE_AUTHOR("Felix Fietkau <nbd@openwrt.org>");
40 MODULE_LICENSE("GPL");
41
42 static int swdev_id = 0;
43 static struct list_head swdevs;
44 static DEFINE_SPINLOCK(swdevs_lock);
45 struct swconfig_callback;
46
47 struct swconfig_callback
48 {
49 struct sk_buff *msg;
50 struct genlmsghdr *hdr;
51 struct genl_info *info;
52 int cmd;
53
54 /* callback for filling in the message data */
55 int (*fill)(struct swconfig_callback *cb, void *arg);
56
57 /* callback for closing the message before sending it */
58 int (*close)(struct swconfig_callback *cb, void *arg);
59
60 struct nlattr *nest[4];
61 int args[4];
62 };
63
64 /* defaults */
65
66 static int
67 swconfig_get_vlan_ports(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
68 {
69 int ret;
70 if (val->port_vlan >= dev->vlans)
71 return -EINVAL;
72
73 if (!dev->ops->get_vlan_ports)
74 return -EOPNOTSUPP;
75
76 ret = dev->ops->get_vlan_ports(dev, val);
77 return ret;
78 }
79
80 static int
81 swconfig_set_vlan_ports(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
82 {
83 struct switch_port *ports = val->value.ports;
84 const struct switch_dev_ops *ops = dev->ops;
85 int i;
86
87 if (val->port_vlan >= dev->vlans)
88 return -EINVAL;
89
90 /* validate ports */
91 if (val->len > dev->ports)
92 return -EINVAL;
93
94 if (!ops->set_vlan_ports)
95 return -EOPNOTSUPP;
96
97 for (i = 0; i < val->len; i++) {
98 if (ports[i].id >= dev->ports)
99 return -EINVAL;
100
101 if (ops->set_port_pvid &&
102 !(ports[i].flags & (1 << SWITCH_PORT_FLAG_TAGGED)))
103 ops->set_port_pvid(dev, ports[i].id, val->port_vlan);
104 }
105
106 return ops->set_vlan_ports(dev, val);
107 }
108
109 static int
110 swconfig_set_pvid(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
111 {
112 if (val->port_vlan >= dev->ports)
113 return -EINVAL;
114
115 if (!dev->ops->set_port_pvid)
116 return -EOPNOTSUPP;
117
118 return dev->ops->set_port_pvid(dev, val->port_vlan, val->value.i);
119 }
120
121 static int
122 swconfig_get_pvid(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
123 {
124 if (val->port_vlan >= dev->ports)
125 return -EINVAL;
126
127 if (!dev->ops->get_port_pvid)
128 return -EOPNOTSUPP;
129
130 return dev->ops->get_port_pvid(dev, val->port_vlan, &val->value.i);
131 }
132
133 static const char *
134 swconfig_speed_str(enum switch_port_speed speed)
135 {
136 switch (speed) {
137 case SWITCH_PORT_SPEED_10:
138 return "10baseT";
139 case SWITCH_PORT_SPEED_100:
140 return "100baseT";
141 case SWITCH_PORT_SPEED_1000:
142 return "1000baseT";
143 default:
144 break;
145 }
146
147 return "unknown";
148 }
149
150 static int
151 swconfig_get_link(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
152 {
153 struct switch_port_link link;
154 int len;
155 int ret;
156
157 if (val->port_vlan >= dev->ports)
158 return -EINVAL;
159
160 if (!dev->ops->get_port_link)
161 return -EOPNOTSUPP;
162
163 memset(&link, 0, sizeof(link));
164 ret = dev->ops->get_port_link(dev, val->port_vlan, &link);
165 if (ret)
166 return ret;
167
168 memset(dev->buf, 0, sizeof(dev->buf));
169
170 if (link.link)
171 len = snprintf(dev->buf, sizeof(dev->buf),
172 "port:%d link:up speed:%s %s-duplex %s%s%s",
173 val->port_vlan,
174 swconfig_speed_str(link.speed),
175 link.duplex ? "full" : "half",
176 link.tx_flow ? "txflow ": "",
177 link.rx_flow ? "rxflow " : "",
178 link.aneg ? "auto" : "");
179 else
180 len = snprintf(dev->buf, sizeof(dev->buf), "port:%d link:down",
181 val->port_vlan);
182
183 val->value.s = dev->buf;
184 val->len = len;
185
186 return 0;
187 }
188
189 static int
190 swconfig_apply_config(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
191 {
192 /* don't complain if not supported by the switch driver */
193 if (!dev->ops->apply_config)
194 return 0;
195
196 return dev->ops->apply_config(dev);
197 }
198
199 static int
200 swconfig_reset_switch(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
201 {
202 /* don't complain if not supported by the switch driver */
203 if (!dev->ops->reset_switch)
204 return 0;
205
206 return dev->ops->reset_switch(dev);
207 }
208
209 enum global_defaults {
210 GLOBAL_APPLY,
211 GLOBAL_RESET,
212 };
213
214 enum vlan_defaults {
215 VLAN_PORTS,
216 };
217
218 enum port_defaults {
219 PORT_PVID,
220 PORT_LINK,
221 };
222
223 static struct switch_attr default_global[] = {
224 [GLOBAL_APPLY] = {
225 .type = SWITCH_TYPE_NOVAL,
226 .name = "apply",
227 .description = "Activate changes in the hardware",
228 .set = swconfig_apply_config,
229 },
230 [GLOBAL_RESET] = {
231 .type = SWITCH_TYPE_NOVAL,
232 .name = "reset",
233 .description = "Reset the switch",
234 .set = swconfig_reset_switch,
235 }
236 };
237
238 static struct switch_attr default_port[] = {
239 [PORT_PVID] = {
240 .type = SWITCH_TYPE_INT,
241 .name = "pvid",
242 .description = "Primary VLAN ID",
243 .set = swconfig_set_pvid,
244 .get = swconfig_get_pvid,
245 },
246 [PORT_LINK] = {
247 .type = SWITCH_TYPE_STRING,
248 .name = "link",
249 .description = "Get port link information",
250 .set = NULL,
251 .get = swconfig_get_link,
252 }
253 };
254
255 static struct switch_attr default_vlan[] = {
256 [VLAN_PORTS] = {
257 .type = SWITCH_TYPE_PORTS,
258 .name = "ports",
259 .description = "VLAN port mapping",
260 .set = swconfig_set_vlan_ports,
261 .get = swconfig_get_vlan_ports,
262 },
263 };
264
265 static const struct switch_attr *
266 swconfig_find_attr_by_name(const struct switch_attrlist *alist, const char *name)
267 {
268 int i;
269
270 for (i = 0; i < alist->n_attr; i++)
271 if (strcmp(name, alist->attr[i].name) == 0)
272 return &alist->attr[i];
273
274 return NULL;
275 }
276
277 static void swconfig_defaults_init(struct switch_dev *dev)
278 {
279 const struct switch_dev_ops *ops = dev->ops;
280
281 dev->def_global = 0;
282 dev->def_vlan = 0;
283 dev->def_port = 0;
284
285 if (ops->get_vlan_ports || ops->set_vlan_ports)
286 set_bit(VLAN_PORTS, &dev->def_vlan);
287
288 if (ops->get_port_pvid || ops->set_port_pvid)
289 set_bit(PORT_PVID, &dev->def_port);
290
291 if (ops->get_port_link &&
292 !swconfig_find_attr_by_name(&ops->attr_port, "link"))
293 set_bit(PORT_LINK, &dev->def_port);
294
295 /* always present, can be no-op */
296 set_bit(GLOBAL_APPLY, &dev->def_global);
297 set_bit(GLOBAL_RESET, &dev->def_global);
298 }
299
300
301 static struct genl_family switch_fam = {
302 .id = GENL_ID_GENERATE,
303 .name = "switch",
304 .hdrsize = 0,
305 .version = 1,
306 .maxattr = SWITCH_ATTR_MAX,
307 };
308
309 static const struct nla_policy switch_policy[SWITCH_ATTR_MAX+1] = {
310 [SWITCH_ATTR_ID] = { .type = NLA_U32 },
311 [SWITCH_ATTR_OP_ID] = { .type = NLA_U32 },
312 [SWITCH_ATTR_OP_PORT] = { .type = NLA_U32 },
313 [SWITCH_ATTR_OP_VLAN] = { .type = NLA_U32 },
314 [SWITCH_ATTR_OP_VALUE_INT] = { .type = NLA_U32 },
315 [SWITCH_ATTR_OP_VALUE_STR] = { .type = NLA_NUL_STRING },
316 [SWITCH_ATTR_OP_VALUE_PORTS] = { .type = NLA_NESTED },
317 [SWITCH_ATTR_TYPE] = { .type = NLA_U32 },
318 };
319
320 static const struct nla_policy port_policy[SWITCH_PORT_ATTR_MAX+1] = {
321 [SWITCH_PORT_ID] = { .type = NLA_U32 },
322 [SWITCH_PORT_FLAG_TAGGED] = { .type = NLA_FLAG },
323 };
324
325 static inline void
326 swconfig_lock(void)
327 {
328 spin_lock(&swdevs_lock);
329 }
330
331 static inline void
332 swconfig_unlock(void)
333 {
334 spin_unlock(&swdevs_lock);
335 }
336
337 static struct switch_dev *
338 swconfig_get_dev(struct genl_info *info)
339 {
340 struct switch_dev *dev = NULL;
341 struct switch_dev *p;
342 int id;
343
344 if (!info->attrs[SWITCH_ATTR_ID])
345 goto done;
346
347 id = nla_get_u32(info->attrs[SWITCH_ATTR_ID]);
348 swconfig_lock();
349 list_for_each_entry(p, &swdevs, dev_list) {
350 if (id != p->id)
351 continue;
352
353 dev = p;
354 break;
355 }
356 if (dev)
357 mutex_lock(&dev->sw_mutex);
358 else
359 DPRINTF("device %d not found\n", id);
360 swconfig_unlock();
361 done:
362 return dev;
363 }
364
365 static inline void
366 swconfig_put_dev(struct switch_dev *dev)
367 {
368 mutex_unlock(&dev->sw_mutex);
369 }
370
371 static int
372 swconfig_dump_attr(struct swconfig_callback *cb, void *arg)
373 {
374 struct switch_attr *op = arg;
375 struct genl_info *info = cb->info;
376 struct sk_buff *msg = cb->msg;
377 int id = cb->args[0];
378 void *hdr;
379
380 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, &switch_fam,
381 NLM_F_MULTI, SWITCH_CMD_NEW_ATTR);
382 if (IS_ERR(hdr))
383 return -1;
384
385 if (nla_put_u32(msg, SWITCH_ATTR_OP_ID, id))
386 goto nla_put_failure;
387 if (nla_put_u32(msg, SWITCH_ATTR_OP_TYPE, op->type))
388 goto nla_put_failure;
389 if (nla_put_string(msg, SWITCH_ATTR_OP_NAME, op->name))
390 goto nla_put_failure;
391 if (op->description)
392 if (nla_put_string(msg, SWITCH_ATTR_OP_DESCRIPTION,
393 op->description))
394 goto nla_put_failure;
395
396 return genlmsg_end(msg, hdr);
397 nla_put_failure:
398 genlmsg_cancel(msg, hdr);
399 return -EMSGSIZE;
400 }
401
402 /* spread multipart messages across multiple message buffers */
403 static int
404 swconfig_send_multipart(struct swconfig_callback *cb, void *arg)
405 {
406 struct genl_info *info = cb->info;
407 int restart = 0;
408 int err;
409
410 do {
411 if (!cb->msg) {
412 cb->msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
413 if (cb->msg == NULL)
414 goto error;
415 }
416
417 if (!(cb->fill(cb, arg) < 0))
418 break;
419
420 /* fill failed, check if this was already the second attempt */
421 if (restart)
422 goto error;
423
424 /* try again in a new message, send the current one */
425 restart = 1;
426 if (cb->close) {
427 if (cb->close(cb, arg) < 0)
428 goto error;
429 }
430 err = genlmsg_reply(cb->msg, info);
431 cb->msg = NULL;
432 if (err < 0)
433 goto error;
434
435 } while (restart);
436
437 return 0;
438
439 error:
440 if (cb->msg)
441 nlmsg_free(cb->msg);
442 return -1;
443 }
444
445 static int
446 swconfig_list_attrs(struct sk_buff *skb, struct genl_info *info)
447 {
448 struct genlmsghdr *hdr = nlmsg_data(info->nlhdr);
449 const struct switch_attrlist *alist;
450 struct switch_dev *dev;
451 struct swconfig_callback cb;
452 int err = -EINVAL;
453 int i;
454
455 /* defaults */
456 struct switch_attr *def_list;
457 unsigned long *def_active;
458 int n_def;
459
460 dev = swconfig_get_dev(info);
461 if (!dev)
462 return -EINVAL;
463
464 switch(hdr->cmd) {
465 case SWITCH_CMD_LIST_GLOBAL:
466 alist = &dev->ops->attr_global;
467 def_list = default_global;
468 def_active = &dev->def_global;
469 n_def = ARRAY_SIZE(default_global);
470 break;
471 case SWITCH_CMD_LIST_VLAN:
472 alist = &dev->ops->attr_vlan;
473 def_list = default_vlan;
474 def_active = &dev->def_vlan;
475 n_def = ARRAY_SIZE(default_vlan);
476 break;
477 case SWITCH_CMD_LIST_PORT:
478 alist = &dev->ops->attr_port;
479 def_list = default_port;
480 def_active = &dev->def_port;
481 n_def = ARRAY_SIZE(default_port);
482 break;
483 default:
484 WARN_ON(1);
485 goto out;
486 }
487
488 memset(&cb, 0, sizeof(cb));
489 cb.info = info;
490 cb.fill = swconfig_dump_attr;
491 for (i = 0; i < alist->n_attr; i++) {
492 if (alist->attr[i].disabled)
493 continue;
494 cb.args[0] = i;
495 err = swconfig_send_multipart(&cb, (void *) &alist->attr[i]);
496 if (err < 0)
497 goto error;
498 }
499
500 /* defaults */
501 for (i = 0; i < n_def; i++) {
502 if (!test_bit(i, def_active))
503 continue;
504 cb.args[0] = SWITCH_ATTR_DEFAULTS_OFFSET + i;
505 err = swconfig_send_multipart(&cb, (void *) &def_list[i]);
506 if (err < 0)
507 goto error;
508 }
509 swconfig_put_dev(dev);
510
511 if (!cb.msg)
512 return 0;
513
514 return genlmsg_reply(cb.msg, info);
515
516 error:
517 if (cb.msg)
518 nlmsg_free(cb.msg);
519 out:
520 swconfig_put_dev(dev);
521 return err;
522 }
523
524 static const struct switch_attr *
525 swconfig_lookup_attr(struct switch_dev *dev, struct genl_info *info,
526 struct switch_val *val)
527 {
528 struct genlmsghdr *hdr = nlmsg_data(info->nlhdr);
529 const struct switch_attrlist *alist;
530 const struct switch_attr *attr = NULL;
531 int attr_id;
532
533 /* defaults */
534 struct switch_attr *def_list;
535 unsigned long *def_active;
536 int n_def;
537
538 if (!info->attrs[SWITCH_ATTR_OP_ID])
539 goto done;
540
541 switch(hdr->cmd) {
542 case SWITCH_CMD_SET_GLOBAL:
543 case SWITCH_CMD_GET_GLOBAL:
544 alist = &dev->ops->attr_global;
545 def_list = default_global;
546 def_active = &dev->def_global;
547 n_def = ARRAY_SIZE(default_global);
548 break;
549 case SWITCH_CMD_SET_VLAN:
550 case SWITCH_CMD_GET_VLAN:
551 alist = &dev->ops->attr_vlan;
552 def_list = default_vlan;
553 def_active = &dev->def_vlan;
554 n_def = ARRAY_SIZE(default_vlan);
555 if (!info->attrs[SWITCH_ATTR_OP_VLAN])
556 goto done;
557 val->port_vlan = nla_get_u32(info->attrs[SWITCH_ATTR_OP_VLAN]);
558 if (val->port_vlan >= dev->vlans)
559 goto done;
560 break;
561 case SWITCH_CMD_SET_PORT:
562 case SWITCH_CMD_GET_PORT:
563 alist = &dev->ops->attr_port;
564 def_list = default_port;
565 def_active = &dev->def_port;
566 n_def = ARRAY_SIZE(default_port);
567 if (!info->attrs[SWITCH_ATTR_OP_PORT])
568 goto done;
569 val->port_vlan = nla_get_u32(info->attrs[SWITCH_ATTR_OP_PORT]);
570 if (val->port_vlan >= dev->ports)
571 goto done;
572 break;
573 default:
574 WARN_ON(1);
575 goto done;
576 }
577
578 if (!alist)
579 goto done;
580
581 attr_id = nla_get_u32(info->attrs[SWITCH_ATTR_OP_ID]);
582 if (attr_id >= SWITCH_ATTR_DEFAULTS_OFFSET) {
583 attr_id -= SWITCH_ATTR_DEFAULTS_OFFSET;
584 if (attr_id >= n_def)
585 goto done;
586 if (!test_bit(attr_id, def_active))
587 goto done;
588 attr = &def_list[attr_id];
589 } else {
590 if (attr_id >= alist->n_attr)
591 goto done;
592 attr = &alist->attr[attr_id];
593 }
594
595 if (attr->disabled)
596 attr = NULL;
597
598 done:
599 if (!attr)
600 DPRINTF("attribute lookup failed\n");
601 val->attr = attr;
602 return attr;
603 }
604
605 static int
606 swconfig_parse_ports(struct sk_buff *msg, struct nlattr *head,
607 struct switch_val *val, int max)
608 {
609 struct nlattr *nla;
610 int rem;
611
612 val->len = 0;
613 nla_for_each_nested(nla, head, rem) {
614 struct nlattr *tb[SWITCH_PORT_ATTR_MAX+1];
615 struct switch_port *port = &val->value.ports[val->len];
616
617 if (val->len >= max)
618 return -EINVAL;
619
620 if (nla_parse_nested(tb, SWITCH_PORT_ATTR_MAX, nla,
621 port_policy))
622 return -EINVAL;
623
624 if (!tb[SWITCH_PORT_ID])
625 return -EINVAL;
626
627 port->id = nla_get_u32(tb[SWITCH_PORT_ID]);
628 if (tb[SWITCH_PORT_FLAG_TAGGED])
629 port->flags |= (1 << SWITCH_PORT_FLAG_TAGGED);
630 val->len++;
631 }
632
633 return 0;
634 }
635
636 static int
637 swconfig_set_attr(struct sk_buff *skb, struct genl_info *info)
638 {
639 const struct switch_attr *attr;
640 struct switch_dev *dev;
641 struct switch_val val;
642 int err = -EINVAL;
643
644 dev = swconfig_get_dev(info);
645 if (!dev)
646 return -EINVAL;
647
648 memset(&val, 0, sizeof(val));
649 attr = swconfig_lookup_attr(dev, info, &val);
650 if (!attr || !attr->set)
651 goto error;
652
653 val.attr = attr;
654 switch(attr->type) {
655 case SWITCH_TYPE_NOVAL:
656 break;
657 case SWITCH_TYPE_INT:
658 if (!info->attrs[SWITCH_ATTR_OP_VALUE_INT])
659 goto error;
660 val.value.i =
661 nla_get_u32(info->attrs[SWITCH_ATTR_OP_VALUE_INT]);
662 break;
663 case SWITCH_TYPE_STRING:
664 if (!info->attrs[SWITCH_ATTR_OP_VALUE_STR])
665 goto error;
666 val.value.s =
667 nla_data(info->attrs[SWITCH_ATTR_OP_VALUE_STR]);
668 break;
669 case SWITCH_TYPE_PORTS:
670 val.value.ports = dev->portbuf;
671 memset(dev->portbuf, 0,
672 sizeof(struct switch_port) * dev->ports);
673
674 /* TODO: implement multipart? */
675 if (info->attrs[SWITCH_ATTR_OP_VALUE_PORTS]) {
676 err = swconfig_parse_ports(skb,
677 info->attrs[SWITCH_ATTR_OP_VALUE_PORTS], &val, dev->ports);
678 if (err < 0)
679 goto error;
680 } else {
681 val.len = 0;
682 err = 0;
683 }
684 break;
685 default:
686 goto error;
687 }
688
689 err = attr->set(dev, attr, &val);
690 error:
691 swconfig_put_dev(dev);
692 return err;
693 }
694
695 static int
696 swconfig_close_portlist(struct swconfig_callback *cb, void *arg)
697 {
698 if (cb->nest[0])
699 nla_nest_end(cb->msg, cb->nest[0]);
700 return 0;
701 }
702
703 static int
704 swconfig_send_port(struct swconfig_callback *cb, void *arg)
705 {
706 const struct switch_port *port = arg;
707 struct nlattr *p = NULL;
708
709 if (!cb->nest[0]) {
710 cb->nest[0] = nla_nest_start(cb->msg, cb->cmd);
711 if (!cb->nest[0])
712 return -1;
713 }
714
715 p = nla_nest_start(cb->msg, SWITCH_ATTR_PORT);
716 if (!p)
717 goto error;
718
719 if (nla_put_u32(cb->msg, SWITCH_PORT_ID, port->id))
720 goto nla_put_failure;
721 if (port->flags & (1 << SWITCH_PORT_FLAG_TAGGED)) {
722 if (nla_put_flag(cb->msg, SWITCH_PORT_FLAG_TAGGED))
723 goto nla_put_failure;
724 }
725
726 nla_nest_end(cb->msg, p);
727 return 0;
728
729 nla_put_failure:
730 nla_nest_cancel(cb->msg, p);
731 error:
732 nla_nest_cancel(cb->msg, cb->nest[0]);
733 return -1;
734 }
735
736 static int
737 swconfig_send_ports(struct sk_buff **msg, struct genl_info *info, int attr,
738 const struct switch_val *val)
739 {
740 struct swconfig_callback cb;
741 int err = 0;
742 int i;
743
744 if (!val->value.ports)
745 return -EINVAL;
746
747 memset(&cb, 0, sizeof(cb));
748 cb.cmd = attr;
749 cb.msg = *msg;
750 cb.info = info;
751 cb.fill = swconfig_send_port;
752 cb.close = swconfig_close_portlist;
753
754 cb.nest[0] = nla_nest_start(cb.msg, cb.cmd);
755 for (i = 0; i < val->len; i++) {
756 err = swconfig_send_multipart(&cb, &val->value.ports[i]);
757 if (err)
758 goto done;
759 }
760 err = val->len;
761 swconfig_close_portlist(&cb, NULL);
762 *msg = cb.msg;
763
764 done:
765 return err;
766 }
767
768 static int
769 swconfig_get_attr(struct sk_buff *skb, struct genl_info *info)
770 {
771 struct genlmsghdr *hdr = nlmsg_data(info->nlhdr);
772 const struct switch_attr *attr;
773 struct switch_dev *dev;
774 struct sk_buff *msg = NULL;
775 struct switch_val val;
776 int err = -EINVAL;
777 int cmd = hdr->cmd;
778
779 dev = swconfig_get_dev(info);
780 if (!dev)
781 return -EINVAL;
782
783 memset(&val, 0, sizeof(val));
784 attr = swconfig_lookup_attr(dev, info, &val);
785 if (!attr || !attr->get)
786 goto error;
787
788 if (attr->type == SWITCH_TYPE_PORTS) {
789 val.value.ports = dev->portbuf;
790 memset(dev->portbuf, 0,
791 sizeof(struct switch_port) * dev->ports);
792 }
793
794 err = attr->get(dev, attr, &val);
795 if (err)
796 goto error;
797
798 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
799 if (!msg)
800 goto error;
801
802 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, &switch_fam,
803 0, cmd);
804 if (IS_ERR(hdr))
805 goto nla_put_failure;
806
807 switch(attr->type) {
808 case SWITCH_TYPE_INT:
809 if (nla_put_u32(msg, SWITCH_ATTR_OP_VALUE_INT, val.value.i))
810 goto nla_put_failure;
811 break;
812 case SWITCH_TYPE_STRING:
813 if (nla_put_string(msg, SWITCH_ATTR_OP_VALUE_STR, val.value.s))
814 goto nla_put_failure;
815 break;
816 case SWITCH_TYPE_PORTS:
817 err = swconfig_send_ports(&msg, info,
818 SWITCH_ATTR_OP_VALUE_PORTS, &val);
819 if (err < 0)
820 goto nla_put_failure;
821 break;
822 default:
823 DPRINTF("invalid type in attribute\n");
824 err = -EINVAL;
825 goto error;
826 }
827 err = genlmsg_end(msg, hdr);
828 if (err < 0)
829 goto nla_put_failure;
830
831 swconfig_put_dev(dev);
832 return genlmsg_reply(msg, info);
833
834 nla_put_failure:
835 if (msg)
836 nlmsg_free(msg);
837 error:
838 swconfig_put_dev(dev);
839 if (!err)
840 err = -ENOMEM;
841 return err;
842 }
843
844 static int
845 swconfig_send_switch(struct sk_buff *msg, u32 pid, u32 seq, int flags,
846 const struct switch_dev *dev)
847 {
848 struct nlattr *p = NULL, *m = NULL;
849 void *hdr;
850 int i;
851
852 hdr = genlmsg_put(msg, pid, seq, &switch_fam, flags,
853 SWITCH_CMD_NEW_ATTR);
854 if (IS_ERR(hdr))
855 return -1;
856
857 if (nla_put_u32(msg, SWITCH_ATTR_ID, dev->id))
858 goto nla_put_failure;
859 if (nla_put_string(msg, SWITCH_ATTR_DEV_NAME, dev->devname))
860 goto nla_put_failure;
861 if (nla_put_string(msg, SWITCH_ATTR_ALIAS, dev->alias))
862 goto nla_put_failure;
863 if (nla_put_string(msg, SWITCH_ATTR_NAME, dev->name))
864 goto nla_put_failure;
865 if (nla_put_u32(msg, SWITCH_ATTR_VLANS, dev->vlans))
866 goto nla_put_failure;
867 if (nla_put_u32(msg, SWITCH_ATTR_PORTS, dev->ports))
868 goto nla_put_failure;
869 if (nla_put_u32(msg, SWITCH_ATTR_CPU_PORT, dev->cpu_port))
870 goto nla_put_failure;
871
872 m = nla_nest_start(msg, SWITCH_ATTR_PORTMAP);
873 if (!m)
874 goto nla_put_failure;
875 for (i = 0; i < dev->ports; i++) {
876 p = nla_nest_start(msg, SWITCH_ATTR_PORTS);
877 if (!p)
878 continue;
879 if (dev->portmap[i].s) {
880 if (nla_put_string(msg, SWITCH_PORTMAP_SEGMENT, dev->portmap[i].s))
881 goto nla_put_failure;
882 if (nla_put_u32(msg, SWITCH_PORTMAP_VIRT, dev->portmap[i].virt))
883 goto nla_put_failure;
884 }
885 nla_nest_end(msg, p);
886 }
887 nla_nest_end(msg, m);
888 return genlmsg_end(msg, hdr);
889 nla_put_failure:
890 genlmsg_cancel(msg, hdr);
891 return -EMSGSIZE;
892 }
893
894 static int swconfig_dump_switches(struct sk_buff *skb,
895 struct netlink_callback *cb)
896 {
897 struct switch_dev *dev;
898 int start = cb->args[0];
899 int idx = 0;
900
901 swconfig_lock();
902 list_for_each_entry(dev, &swdevs, dev_list) {
903 if (++idx <= start)
904 continue;
905 if (swconfig_send_switch(skb, NETLINK_CB(cb->skb).portid,
906 cb->nlh->nlmsg_seq, NLM_F_MULTI,
907 dev) < 0)
908 break;
909 }
910 swconfig_unlock();
911 cb->args[0] = idx;
912
913 return skb->len;
914 }
915
916 static int
917 swconfig_done(struct netlink_callback *cb)
918 {
919 return 0;
920 }
921
922 static struct genl_ops swconfig_ops[] = {
923 {
924 .cmd = SWITCH_CMD_LIST_GLOBAL,
925 .doit = swconfig_list_attrs,
926 .policy = switch_policy,
927 },
928 {
929 .cmd = SWITCH_CMD_LIST_VLAN,
930 .doit = swconfig_list_attrs,
931 .policy = switch_policy,
932 },
933 {
934 .cmd = SWITCH_CMD_LIST_PORT,
935 .doit = swconfig_list_attrs,
936 .policy = switch_policy,
937 },
938 {
939 .cmd = SWITCH_CMD_GET_GLOBAL,
940 .doit = swconfig_get_attr,
941 .policy = switch_policy,
942 },
943 {
944 .cmd = SWITCH_CMD_GET_VLAN,
945 .doit = swconfig_get_attr,
946 .policy = switch_policy,
947 },
948 {
949 .cmd = SWITCH_CMD_GET_PORT,
950 .doit = swconfig_get_attr,
951 .policy = switch_policy,
952 },
953 {
954 .cmd = SWITCH_CMD_SET_GLOBAL,
955 .doit = swconfig_set_attr,
956 .policy = switch_policy,
957 },
958 {
959 .cmd = SWITCH_CMD_SET_VLAN,
960 .doit = swconfig_set_attr,
961 .policy = switch_policy,
962 },
963 {
964 .cmd = SWITCH_CMD_SET_PORT,
965 .doit = swconfig_set_attr,
966 .policy = switch_policy,
967 },
968 {
969 .cmd = SWITCH_CMD_GET_SWITCH,
970 .dumpit = swconfig_dump_switches,
971 .policy = switch_policy,
972 .done = swconfig_done,
973 }
974 };
975
976 #ifdef CONFIG_OF
977 void
978 of_switch_load_portmap(struct switch_dev *dev)
979 {
980 struct device_node *port;
981
982 if (!dev->of_node)
983 return;
984
985 for_each_child_of_node(dev->of_node, port) {
986 const __be32 *prop;
987 const char *segment;
988 int size, phys;
989
990 if (!of_device_is_compatible(port, "swconfig,port"))
991 continue;
992
993 if (of_property_read_string(port, "swconfig,segment", &segment))
994 continue;
995
996 prop = of_get_property(port, "swconfig,portmap", &size);
997 if (!prop)
998 continue;
999
1000 if (size != (2 * sizeof(*prop))) {
1001 pr_err("%s: failed to parse port mapping\n", port->name);
1002 continue;
1003 }
1004
1005 phys = be32_to_cpup(prop++);
1006 if ((phys < 0) | (phys >= dev->ports)) {
1007 pr_err("%s: physical port index out of range\n", port->name);
1008 continue;
1009 }
1010
1011 dev->portmap[phys].s = kstrdup(segment, GFP_KERNEL);
1012 dev->portmap[phys].virt = be32_to_cpup(prop);
1013 pr_debug("Found port: %s, physical: %d, virtual: %d\n",
1014 segment, phys, dev->portmap[phys].virt);
1015 }
1016 }
1017 #endif
1018
1019 int
1020 register_switch(struct switch_dev *dev, struct net_device *netdev)
1021 {
1022 struct switch_dev *sdev;
1023 const int max_switches = 8 * sizeof(unsigned long);
1024 unsigned long in_use = 0;
1025 int err;
1026 int i;
1027
1028 INIT_LIST_HEAD(&dev->dev_list);
1029 if (netdev) {
1030 dev->netdev = netdev;
1031 if (!dev->alias)
1032 dev->alias = netdev->name;
1033 }
1034 BUG_ON(!dev->alias);
1035
1036 if (dev->ports > 0) {
1037 dev->portbuf = kzalloc(sizeof(struct switch_port) * dev->ports,
1038 GFP_KERNEL);
1039 if (!dev->portbuf)
1040 return -ENOMEM;
1041 dev->portmap = kzalloc(sizeof(struct switch_portmap) * dev->ports,
1042 GFP_KERNEL);
1043 if (!dev->portmap) {
1044 kfree(dev->portbuf);
1045 return -ENOMEM;
1046 }
1047 }
1048 swconfig_defaults_init(dev);
1049 mutex_init(&dev->sw_mutex);
1050 swconfig_lock();
1051 dev->id = ++swdev_id;
1052
1053 list_for_each_entry(sdev, &swdevs, dev_list) {
1054 if (!sscanf(sdev->devname, SWCONFIG_DEVNAME, &i))
1055 continue;
1056 if (i < 0 || i > max_switches)
1057 continue;
1058
1059 set_bit(i, &in_use);
1060 }
1061 i = find_first_zero_bit(&in_use, max_switches);
1062
1063 if (i == max_switches) {
1064 swconfig_unlock();
1065 return -ENFILE;
1066 }
1067
1068 #ifdef CONFIG_OF
1069 if (dev->ports)
1070 of_switch_load_portmap(dev);
1071 #endif
1072
1073 /* fill device name */
1074 snprintf(dev->devname, IFNAMSIZ, SWCONFIG_DEVNAME, i);
1075
1076 list_add(&dev->dev_list, &swdevs);
1077 swconfig_unlock();
1078
1079 err = swconfig_create_led_trigger(dev);
1080 if (err)
1081 return err;
1082
1083 return 0;
1084 }
1085 EXPORT_SYMBOL_GPL(register_switch);
1086
1087 void
1088 unregister_switch(struct switch_dev *dev)
1089 {
1090 swconfig_destroy_led_trigger(dev);
1091 kfree(dev->portbuf);
1092 mutex_lock(&dev->sw_mutex);
1093 swconfig_lock();
1094 list_del(&dev->dev_list);
1095 swconfig_unlock();
1096 mutex_unlock(&dev->sw_mutex);
1097 }
1098 EXPORT_SYMBOL_GPL(unregister_switch);
1099
1100
1101 static int __init
1102 swconfig_init(void)
1103 {
1104 int i, err;
1105
1106 INIT_LIST_HEAD(&swdevs);
1107 err = genl_register_family(&switch_fam);
1108 if (err)
1109 return err;
1110
1111 for (i = 0; i < ARRAY_SIZE(swconfig_ops); i++) {
1112 err = genl_register_ops(&switch_fam, &swconfig_ops[i]);
1113 if (err)
1114 goto unregister;
1115 }
1116
1117 return 0;
1118
1119 unregister:
1120 genl_unregister_family(&switch_fam);
1121 return err;
1122 }
1123
1124 static void __exit
1125 swconfig_exit(void)
1126 {
1127 genl_unregister_family(&switch_fam);
1128 }
1129
1130 module_init(swconfig_init);
1131 module_exit(swconfig_exit);
1132
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