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lec: convert to internal network_device_stats
[linux-2.6/mini2440.git] / net / atm / lec.c
blob63ff8b9a85baac217dce6dddbc8c64d78b52a047
1 /*
2 * lec.c: Lan Emulation driver
3 *
4 * Marko Kiiskila <mkiiskila@yahoo.com>
5 */
6
7 #include <linux/kernel.h>
8 #include <linux/bitops.h>
9 #include <linux/capability.h>
10
11 /* We are ethernet device */
12 #include <linux/if_ether.h>
13 #include <linux/netdevice.h>
14 #include <linux/etherdevice.h>
15 #include <net/sock.h>
16 #include <linux/skbuff.h>
17 #include <linux/ip.h>
18 #include <asm/byteorder.h>
19 #include <asm/uaccess.h>
20 #include <net/arp.h>
21 #include <net/dst.h>
22 #include <linux/proc_fs.h>
23 #include <linux/spinlock.h>
24 #include <linux/seq_file.h>
25
26 /* TokenRing if needed */
27 #ifdef CONFIG_TR
28 #include <linux/trdevice.h>
29 #endif
30
31 /* And atm device */
32 #include <linux/atmdev.h>
33 #include <linux/atmlec.h>
34
35 /* Proxy LEC knows about bridging */
36 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
37 #include <linux/if_bridge.h>
38 #include "../bridge/br_private.h"
39
40 static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
41 #endif
42
43 /* Modular too */
44 #include <linux/module.h>
45 #include <linux/init.h>
46
47 #include "lec.h"
48 #include "lec_arpc.h"
49 #include "resources.h"
50
51 #define DUMP_PACKETS 0 /*
52 * 0 = None,
53 * 1 = 30 first bytes
54 * 2 = Whole packet
55 */
56
57 #define LEC_UNRES_QUE_LEN 8 /*
58 * number of tx packets to queue for a
59 * single destination while waiting for SVC
60 */
61
62 static int lec_open(struct net_device *dev);
63 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev);
64 static int lec_close(struct net_device *dev);
65 static void lec_init(struct net_device *dev);
66 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
67 const unsigned char *mac_addr);
68 static int lec_arp_remove(struct lec_priv *priv,
69 struct lec_arp_table *to_remove);
70 /* LANE2 functions */
71 static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address,
72 const u8 *tlvs, u32 sizeoftlvs);
73 static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
74 u8 **tlvs, u32 *sizeoftlvs);
75 static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
76 const u8 *tlvs, u32 sizeoftlvs);
77
78 static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
79 unsigned long permanent);
80 static void lec_arp_check_empties(struct lec_priv *priv,
81 struct atm_vcc *vcc, struct sk_buff *skb);
82 static void lec_arp_destroy(struct lec_priv *priv);
83 static void lec_arp_init(struct lec_priv *priv);
84 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
85 const unsigned char *mac_to_find,
86 int is_rdesc,
87 struct lec_arp_table **ret_entry);
88 static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
89 const unsigned char *atm_addr, unsigned long remoteflag,
90 unsigned int targetless_le_arp);
91 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
92 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
93 static void lec_set_flush_tran_id(struct lec_priv *priv,
94 const unsigned char *atm_addr,
95 unsigned long tran_id);
96 static void lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
97 struct atm_vcc *vcc,
98 void (*old_push) (struct atm_vcc *vcc,
99 struct sk_buff *skb));
100 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
101
102 /* must be done under lec_arp_lock */
103 static inline void lec_arp_hold(struct lec_arp_table *entry)
104 {
105 atomic_inc(&entry->usage);
106 }
107
108 static inline void lec_arp_put(struct lec_arp_table *entry)
109 {
110 if (atomic_dec_and_test(&entry->usage))
111 kfree(entry);
112 }
113
114
115 static struct lane2_ops lane2_ops = {
116 lane2_resolve, /* resolve, spec 3.1.3 */
117 lane2_associate_req, /* associate_req, spec 3.1.4 */
118 NULL /* associate indicator, spec 3.1.5 */
119 };
120
121 static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
122
123 /* Device structures */
124 static struct net_device *dev_lec[MAX_LEC_ITF];
125
126 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
127 static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
128 {
129 struct ethhdr *eth;
130 char *buff;
131 struct lec_priv *priv;
132
133 /*
134 * Check if this is a BPDU. If so, ask zeppelin to send
135 * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
136 * as the Config BPDU has
137 */
138 eth = (struct ethhdr *)skb->data;
139 buff = skb->data + skb->dev->hard_header_len;
140 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
141 struct sock *sk;
142 struct sk_buff *skb2;
143 struct atmlec_msg *mesg;
144
145 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
146 if (skb2 == NULL)
147 return;
148 skb2->len = sizeof(struct atmlec_msg);
149 mesg = (struct atmlec_msg *)skb2->data;
150 mesg->type = l_topology_change;
151 buff += 4;
152 mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */
153
154 priv = netdev_priv(dev);
155 atm_force_charge(priv->lecd, skb2->truesize);
156 sk = sk_atm(priv->lecd);
157 skb_queue_tail(&sk->sk_receive_queue, skb2);
158 sk->sk_data_ready(sk, skb2->len);
159 }
160
161 return;
162 }
163 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
164
165 /*
166 * Modelled after tr_type_trans
167 * All multicast and ARE or STE frames go to BUS.
168 * Non source routed frames go by destination address.
169 * Last hop source routed frames go by destination address.
170 * Not last hop source routed frames go by _next_ route descriptor.
171 * Returns pointer to destination MAC address or fills in rdesc
172 * and returns NULL.
173 */
174 #ifdef CONFIG_TR
175 static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)
176 {
177 struct trh_hdr *trh;
178 unsigned int riflen, num_rdsc;
179
180 trh = (struct trh_hdr *)packet;
181 if (trh->daddr[0] & (uint8_t) 0x80)
182 return bus_mac; /* multicast */
183
184 if (trh->saddr[0] & TR_RII) {
185 riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
186 if ((ntohs(trh->rcf) >> 13) != 0)
187 return bus_mac; /* ARE or STE */
188 } else
189 return trh->daddr; /* not source routed */
190
191 if (riflen < 6)
192 return trh->daddr; /* last hop, source routed */
193
194 /* riflen is 6 or more, packet has more than one route descriptor */
195 num_rdsc = (riflen / 2) - 1;
196 memset(rdesc, 0, ETH_ALEN);
197 /* offset 4 comes from LAN destination field in LE control frames */
198 if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT))
199 memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(__be16));
200 else {
201 memcpy(&rdesc[4], &trh->rseg[1], sizeof(__be16));
202 rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));
203 }
204
205 return NULL;
206 }
207 #endif /* CONFIG_TR */
208
209 /*
210 * Open/initialize the netdevice. This is called (in the current kernel)
211 * sometime after booting when the 'ifconfig' program is run.
212 *
213 * This routine should set everything up anew at each open, even
214 * registers that "should" only need to be set once at boot, so that
215 * there is non-reboot way to recover if something goes wrong.
216 */
217
218 static int lec_open(struct net_device *dev)
219 {
220 netif_start_queue(dev);
221 memset(&dev->stats, 0, sizeof(struct net_device_stats));
222
223 return 0;
224 }
225
226 static void
227 lec_send(struct atm_vcc *vcc, struct sk_buff *skb)
228 {
229 struct net_device *dev = skb->dev;
230
231 ATM_SKB(skb)->vcc = vcc;
232 ATM_SKB(skb)->atm_options = vcc->atm_options;
233
234 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
235 if (vcc->send(vcc, skb) < 0) {
236 dev->stats.tx_dropped++;
237 return;
238 }
239
240 dev->stats.tx_packets++;
241 dev->stats.tx_bytes += skb->len;
242 }
243
244 static void lec_tx_timeout(struct net_device *dev)
245 {
246 printk(KERN_INFO "%s: tx timeout\n", dev->name);
247 dev->trans_start = jiffies;
248 netif_wake_queue(dev);
249 }
250
251 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev)
252 {
253 struct sk_buff *skb2;
254 struct lec_priv *priv = netdev_priv(dev);
255 struct lecdatahdr_8023 *lec_h;
256 struct atm_vcc *vcc;
257 struct lec_arp_table *entry;
258 unsigned char *dst;
259 int min_frame_size;
260 #ifdef CONFIG_TR
261 unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */
262 #endif
263 int is_rdesc;
264 #if DUMP_PACKETS > 0
265 char buf[300];
266 int i = 0;
267 #endif /* DUMP_PACKETS >0 */
268
269 pr_debug("lec_start_xmit called\n");
270 if (!priv->lecd) {
271 printk("%s:No lecd attached\n", dev->name);
272 dev->stats.tx_errors++;
273 netif_stop_queue(dev);
274 return -EUNATCH;
275 }
276
277 pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
278 (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb),
279 (long)skb_end_pointer(skb));
280 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
281 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
282 lec_handle_bridge(skb, dev);
283 #endif
284
285 /* Make sure we have room for lec_id */
286 if (skb_headroom(skb) < 2) {
287
288 pr_debug("lec_start_xmit: reallocating skb\n");
289 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
290 kfree_skb(skb);
291 if (skb2 == NULL)
292 return 0;
293 skb = skb2;
294 }
295 skb_push(skb, 2);
296
297 /* Put le header to place, works for TokenRing too */
298 lec_h = (struct lecdatahdr_8023 *)skb->data;
299 lec_h->le_header = htons(priv->lecid);
300
301 #ifdef CONFIG_TR
302 /*
303 * Ugly. Use this to realign Token Ring packets for
304 * e.g. PCA-200E driver.
305 */
306 if (priv->is_trdev) {
307 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
308 kfree_skb(skb);
309 if (skb2 == NULL)
310 return 0;
311 skb = skb2;
312 }
313 #endif
314
315 #if DUMP_PACKETS > 0
316 printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name,
317 skb->len, priv->lecid);
318 #if DUMP_PACKETS >= 2
319 for (i = 0; i < skb->len && i < 99; i++) {
320 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
321 }
322 #elif DUMP_PACKETS >= 1
323 for (i = 0; i < skb->len && i < 30; i++) {
324 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
325 }
326 #endif /* DUMP_PACKETS >= 1 */
327 if (i == skb->len)
328 printk("%s\n", buf);
329 else
330 printk("%s...\n", buf);
331 #endif /* DUMP_PACKETS > 0 */
332
333 /* Minimum ethernet-frame size */
334 #ifdef CONFIG_TR
335 if (priv->is_trdev)
336 min_frame_size = LEC_MINIMUM_8025_SIZE;
337 else
338 #endif
339 min_frame_size = LEC_MINIMUM_8023_SIZE;
340 if (skb->len < min_frame_size) {
341 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
342 skb2 = skb_copy_expand(skb, 0,
343 min_frame_size - skb->truesize,
344 GFP_ATOMIC);
345 dev_kfree_skb(skb);
346 if (skb2 == NULL) {
347 dev->stats.tx_dropped++;
348 return 0;
349 }
350 skb = skb2;
351 }
352 skb_put(skb, min_frame_size - skb->len);
353 }
354
355 /* Send to right vcc */
356 is_rdesc = 0;
357 dst = lec_h->h_dest;
358 #ifdef CONFIG_TR
359 if (priv->is_trdev) {
360 dst = get_tr_dst(skb->data + 2, rdesc);
361 if (dst == NULL) {
362 dst = rdesc;
363 is_rdesc = 1;
364 }
365 }
366 #endif
367 entry = NULL;
368 vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
369 pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n", dev->name,
370 vcc, vcc ? vcc->flags : 0, entry);
371 if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
372 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
373 pr_debug("%s:lec_start_xmit: queuing packet, ",
374 dev->name);
375 pr_debug("MAC address %pM\n", lec_h->h_dest);
376 skb_queue_tail(&entry->tx_wait, skb);
377 } else {
378 pr_debug
379 ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ",
380 dev->name);
381 pr_debug("MAC address %pM\n", lec_h->h_dest);
382 dev->stats.tx_dropped++;
383 dev_kfree_skb(skb);
384 }
385 goto out;
386 }
387 #if DUMP_PACKETS > 0
388 printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci);
389 #endif /* DUMP_PACKETS > 0 */
390
391 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
392 pr_debug("lec.c: emptying tx queue, ");
393 pr_debug("MAC address %pM\n", lec_h->h_dest);
394 lec_send(vcc, skb2);
395 }
396
397 lec_send(vcc, skb);
398
399 if (!atm_may_send(vcc, 0)) {
400 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
401
402 vpriv->xoff = 1;
403 netif_stop_queue(dev);
404
405 /*
406 * vcc->pop() might have occurred in between, making
407 * the vcc usuable again. Since xmit is serialized,
408 * this is the only situation we have to re-test.
409 */
410
411 if (atm_may_send(vcc, 0))
412 netif_wake_queue(dev);
413 }
414
415 out:
416 if (entry)
417 lec_arp_put(entry);
418 dev->trans_start = jiffies;
419 return 0;
420 }
421
422 /* The inverse routine to net_open(). */
423 static int lec_close(struct net_device *dev)
424 {
425 netif_stop_queue(dev);
426 return 0;
427 }
428
429 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
430 {
431 unsigned long flags;
432 struct net_device *dev = (struct net_device *)vcc->proto_data;
433 struct lec_priv *priv = netdev_priv(dev);
434 struct atmlec_msg *mesg;
435 struct lec_arp_table *entry;
436 int i;
437 char *tmp; /* FIXME */
438
439 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
440 mesg = (struct atmlec_msg *)skb->data;
441 tmp = skb->data;
442 tmp += sizeof(struct atmlec_msg);
443 pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
444 switch (mesg->type) {
445 case l_set_mac_addr:
446 for (i = 0; i < 6; i++) {
447 dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
448 }
449 break;
450 case l_del_mac_addr:
451 for (i = 0; i < 6; i++) {
452 dev->dev_addr[i] = 0;
453 }
454 break;
455 case l_addr_delete:
456 lec_addr_delete(priv, mesg->content.normal.atm_addr,
457 mesg->content.normal.flag);
458 break;
459 case l_topology_change:
460 priv->topology_change = mesg->content.normal.flag;
461 break;
462 case l_flush_complete:
463 lec_flush_complete(priv, mesg->content.normal.flag);
464 break;
465 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
466 spin_lock_irqsave(&priv->lec_arp_lock, flags);
467 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
468 lec_arp_remove(priv, entry);
469 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
470
471 if (mesg->content.normal.no_source_le_narp)
472 break;
473 /* FALL THROUGH */
474 case l_arp_update:
475 lec_arp_update(priv, mesg->content.normal.mac_addr,
476 mesg->content.normal.atm_addr,
477 mesg->content.normal.flag,
478 mesg->content.normal.targetless_le_arp);
479 pr_debug("lec: in l_arp_update\n");
480 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
481 pr_debug("lec: LANE2 3.1.5, got tlvs, size %d\n",
482 mesg->sizeoftlvs);
483 lane2_associate_ind(dev, mesg->content.normal.mac_addr,
484 tmp, mesg->sizeoftlvs);
485 }
486 break;
487 case l_config:
488 priv->maximum_unknown_frame_count =
489 mesg->content.config.maximum_unknown_frame_count;
490 priv->max_unknown_frame_time =
491 (mesg->content.config.max_unknown_frame_time * HZ);
492 priv->max_retry_count = mesg->content.config.max_retry_count;
493 priv->aging_time = (mesg->content.config.aging_time * HZ);
494 priv->forward_delay_time =
495 (mesg->content.config.forward_delay_time * HZ);
496 priv->arp_response_time =
497 (mesg->content.config.arp_response_time * HZ);
498 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
499 priv->path_switching_delay =
500 (mesg->content.config.path_switching_delay * HZ);
501 priv->lane_version = mesg->content.config.lane_version; /* LANE2 */
502 priv->lane2_ops = NULL;
503 if (priv->lane_version > 1)
504 priv->lane2_ops = &lane2_ops;
505 if (dev->change_mtu(dev, mesg->content.config.mtu))
506 printk("%s: change_mtu to %d failed\n", dev->name,
507 mesg->content.config.mtu);
508 priv->is_proxy = mesg->content.config.is_proxy;
509 break;
510 case l_flush_tran_id:
511 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
512 mesg->content.normal.flag);
513 break;
514 case l_set_lecid:
515 priv->lecid =
516 (unsigned short)(0xffff & mesg->content.normal.flag);
517 break;
518 case l_should_bridge:
519 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
520 {
521 struct net_bridge_fdb_entry *f;
522
523 pr_debug("%s: bridge zeppelin asks about %pM\n",
524 dev->name, mesg->content.proxy.mac_addr);
525
526 if (br_fdb_get_hook == NULL || dev->br_port == NULL)
527 break;
528
529 f = br_fdb_get_hook(dev->br_port->br,
530 mesg->content.proxy.mac_addr);
531 if (f != NULL && f->dst->dev != dev
532 && f->dst->state == BR_STATE_FORWARDING) {
533 /* hit from bridge table, send LE_ARP_RESPONSE */
534 struct sk_buff *skb2;
535 struct sock *sk;
536
537 pr_debug
538 ("%s: entry found, responding to zeppelin\n",
539 dev->name);
540 skb2 =
541 alloc_skb(sizeof(struct atmlec_msg),
542 GFP_ATOMIC);
543 if (skb2 == NULL) {
544 br_fdb_put_hook(f);
545 break;
546 }
547 skb2->len = sizeof(struct atmlec_msg);
548 skb_copy_to_linear_data(skb2, mesg,
549 sizeof(*mesg));
550 atm_force_charge(priv->lecd, skb2->truesize);
551 sk = sk_atm(priv->lecd);
552 skb_queue_tail(&sk->sk_receive_queue, skb2);
553 sk->sk_data_ready(sk, skb2->len);
554 }
555 if (f != NULL)
556 br_fdb_put_hook(f);
557 }
558 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
559 break;
560 default:
561 printk("%s: Unknown message type %d\n", dev->name, mesg->type);
562 dev_kfree_skb(skb);
563 return -EINVAL;
564 }
565 dev_kfree_skb(skb);
566 return 0;
567 }
568
569 static void lec_atm_close(struct atm_vcc *vcc)
570 {
571 struct sk_buff *skb;
572 struct net_device *dev = (struct net_device *)vcc->proto_data;
573 struct lec_priv *priv = netdev_priv(dev);
574
575 priv->lecd = NULL;
576 /* Do something needful? */
577
578 netif_stop_queue(dev);
579 lec_arp_destroy(priv);
580
581 if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
582 printk("%s lec_atm_close: closing with messages pending\n",
583 dev->name);
584 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) {
585 atm_return(vcc, skb->truesize);
586 dev_kfree_skb(skb);
587 }
588
589 printk("%s: Shut down!\n", dev->name);
590 module_put(THIS_MODULE);
591 }
592
593 static struct atmdev_ops lecdev_ops = {
594 .close = lec_atm_close,
595 .send = lec_atm_send
596 };
597
598 static struct atm_dev lecatm_dev = {
599 .ops = &lecdev_ops,
600 .type = "lec",
601 .number = 999, /* dummy device number */
602 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
603 };
604
605 /*
606 * LANE2: new argument struct sk_buff *data contains
607 * the LE_ARP based TLVs introduced in the LANE2 spec
608 */
609 static int
610 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
611 const unsigned char *mac_addr, const unsigned char *atm_addr,
612 struct sk_buff *data)
613 {
614 struct sock *sk;
615 struct sk_buff *skb;
616 struct atmlec_msg *mesg;
617
618 if (!priv || !priv->lecd) {
619 return -1;
620 }
621 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
622 if (!skb)
623 return -1;
624 skb->len = sizeof(struct atmlec_msg);
625 mesg = (struct atmlec_msg *)skb->data;
626 memset(mesg, 0, sizeof(struct atmlec_msg));
627 mesg->type = type;
628 if (data != NULL)
629 mesg->sizeoftlvs = data->len;
630 if (mac_addr)
631 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN);
632 else
633 mesg->content.normal.targetless_le_arp = 1;
634 if (atm_addr)
635 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
636
637 atm_force_charge(priv->lecd, skb->truesize);
638 sk = sk_atm(priv->lecd);
639 skb_queue_tail(&sk->sk_receive_queue, skb);
640 sk->sk_data_ready(sk, skb->len);
641
642 if (data != NULL) {
643 pr_debug("lec: about to send %d bytes of data\n", data->len);
644 atm_force_charge(priv->lecd, data->truesize);
645 skb_queue_tail(&sk->sk_receive_queue, data);
646 sk->sk_data_ready(sk, skb->len);
647 }
648
649 return 0;
650 }
651
652 /* shamelessly stolen from drivers/net/net_init.c */
653 static int lec_change_mtu(struct net_device *dev, int new_mtu)
654 {
655 if ((new_mtu < 68) || (new_mtu > 18190))
656 return -EINVAL;
657 dev->mtu = new_mtu;
658 return 0;
659 }
660
661 static void lec_set_multicast_list(struct net_device *dev)
662 {
663 /*
664 * by default, all multicast frames arrive over the bus.
665 * eventually support selective multicast service
666 */
667 return;
668 }
669
670 static void lec_init(struct net_device *dev)
671 {
672 dev->change_mtu = lec_change_mtu;
673 dev->open = lec_open;
674 dev->stop = lec_close;
675 dev->hard_start_xmit = lec_start_xmit;
676 dev->tx_timeout = lec_tx_timeout;
677
678 dev->get_stats = lec_get_stats;
679 dev->set_multicast_list = lec_set_multicast_list;
680 dev->do_ioctl = NULL;
681 printk("%s: Initialized!\n", dev->name);
682 }
683
684 static const unsigned char lec_ctrl_magic[] = {
685 0xff,
686 0x00,
687 0x01,
688 0x01
689 };
690
691 #define LEC_DATA_DIRECT_8023 2
692 #define LEC_DATA_DIRECT_8025 3
693
694 static int lec_is_data_direct(struct atm_vcc *vcc)
695 {
696 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
697 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
698 }
699
700 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
701 {
702 unsigned long flags;
703 struct net_device *dev = (struct net_device *)vcc->proto_data;
704 struct lec_priv *priv = netdev_priv(dev);
705
706 #if DUMP_PACKETS >0
707 int i = 0;
708 char buf[300];
709
710 printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name,
711 vcc->vpi, vcc->vci);
712 #endif
713 if (!skb) {
714 pr_debug("%s: null skb\n", dev->name);
715 lec_vcc_close(priv, vcc);
716 return;
717 }
718 #if DUMP_PACKETS > 0
719 printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name,
720 skb->len, priv->lecid);
721 #if DUMP_PACKETS >= 2
722 for (i = 0; i < skb->len && i < 99; i++) {
723 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
724 }
725 #elif DUMP_PACKETS >= 1
726 for (i = 0; i < skb->len && i < 30; i++) {
727 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
728 }
729 #endif /* DUMP_PACKETS >= 1 */
730 if (i == skb->len)
731 printk("%s\n", buf);
732 else
733 printk("%s...\n", buf);
734 #endif /* DUMP_PACKETS > 0 */
735 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { /* Control frame, to daemon */
736 struct sock *sk = sk_atm(vcc);
737
738 pr_debug("%s: To daemon\n", dev->name);
739 skb_queue_tail(&sk->sk_receive_queue, skb);
740 sk->sk_data_ready(sk, skb->len);
741 } else { /* Data frame, queue to protocol handlers */
742 struct lec_arp_table *entry;
743 unsigned char *src, *dst;
744
745 atm_return(vcc, skb->truesize);
746 if (*(__be16 *) skb->data == htons(priv->lecid) ||
747 !priv->lecd || !(dev->flags & IFF_UP)) {
748 /*
749 * Probably looping back, or if lecd is missing,
750 * lecd has gone down
751 */
752 pr_debug("Ignoring frame...\n");
753 dev_kfree_skb(skb);
754 return;
755 }
756 #ifdef CONFIG_TR
757 if (priv->is_trdev)
758 dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest;
759 else
760 #endif
761 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
762
763 /*
764 * If this is a Data Direct VCC, and the VCC does not match
765 * the LE_ARP cache entry, delete the LE_ARP cache entry.
766 */
767 spin_lock_irqsave(&priv->lec_arp_lock, flags);
768 if (lec_is_data_direct(vcc)) {
769 #ifdef CONFIG_TR
770 if (priv->is_trdev)
771 src =
772 ((struct lecdatahdr_8025 *)skb->data)->
773 h_source;
774 else
775 #endif
776 src =
777 ((struct lecdatahdr_8023 *)skb->data)->
778 h_source;
779 entry = lec_arp_find(priv, src);
780 if (entry && entry->vcc != vcc) {
781 lec_arp_remove(priv, entry);
782 lec_arp_put(entry);
783 }
784 }
785 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
786
787 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
788 !priv->is_proxy && /* Proxy wants all the packets */
789 memcmp(dst, dev->dev_addr, dev->addr_len)) {
790 dev_kfree_skb(skb);
791 return;
792 }
793 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
794 lec_arp_check_empties(priv, vcc, skb);
795 }
796 skb_pull(skb, 2); /* skip lec_id */
797 #ifdef CONFIG_TR
798 if (priv->is_trdev)
799 skb->protocol = tr_type_trans(skb, dev);
800 else
801 #endif
802 skb->protocol = eth_type_trans(skb, dev);
803 dev->stats.rx_packets++;
804 dev->stats.rx_bytes += skb->len;
805 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
806 netif_rx(skb);
807 }
808 }
809
810 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
811 {
812 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
813 struct net_device *dev = skb->dev;
814
815 if (vpriv == NULL) {
816 printk("lec_pop(): vpriv = NULL!?!?!?\n");
817 return;
818 }
819
820 vpriv->old_pop(vcc, skb);
821
822 if (vpriv->xoff && atm_may_send(vcc, 0)) {
823 vpriv->xoff = 0;
824 if (netif_running(dev) && netif_queue_stopped(dev))
825 netif_wake_queue(dev);
826 }
827 }
828
829 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
830 {
831 struct lec_vcc_priv *vpriv;
832 int bytes_left;
833 struct atmlec_ioc ioc_data;
834
835 /* Lecd must be up in this case */
836 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
837 if (bytes_left != 0) {
838 printk
839 ("lec: lec_vcc_attach, copy from user failed for %d bytes\n",
840 bytes_left);
841 }
842 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
843 !dev_lec[ioc_data.dev_num])
844 return -EINVAL;
845 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
846 return -ENOMEM;
847 vpriv->xoff = 0;
848 vpriv->old_pop = vcc->pop;
849 vcc->user_back = vpriv;
850 vcc->pop = lec_pop;
851 lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]),
852 &ioc_data, vcc, vcc->push);
853 vcc->proto_data = dev_lec[ioc_data.dev_num];
854 vcc->push = lec_push;
855 return 0;
856 }
857
858 static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
859 {
860 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
861 return -EINVAL;
862 vcc->proto_data = dev_lec[arg];
863 return lec_mcast_make((struct lec_priv *)netdev_priv(dev_lec[arg]),
864 vcc);
865 }
866
867 /* Initialize device. */
868 static int lecd_attach(struct atm_vcc *vcc, int arg)
869 {
870 int i;
871 struct lec_priv *priv;
872
873 if (arg < 0)
874 i = 0;
875 else
876 i = arg;
877 #ifdef CONFIG_TR
878 if (arg >= MAX_LEC_ITF)
879 return -EINVAL;
880 #else /* Reserve the top NUM_TR_DEVS for TR */
881 if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS))
882 return -EINVAL;
883 #endif
884 if (!dev_lec[i]) {
885 int is_trdev, size;
886
887 is_trdev = 0;
888 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))
889 is_trdev = 1;
890
891 size = sizeof(struct lec_priv);
892 #ifdef CONFIG_TR
893 if (is_trdev)
894 dev_lec[i] = alloc_trdev(size);
895 else
896 #endif
897 dev_lec[i] = alloc_etherdev(size);
898 if (!dev_lec[i])
899 return -ENOMEM;
900 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
901 if (register_netdev(dev_lec[i])) {
902 free_netdev(dev_lec[i]);
903 return -EINVAL;
904 }
905
906 priv = netdev_priv(dev_lec[i]);
907 priv->is_trdev = is_trdev;
908 lec_init(dev_lec[i]);
909 } else {
910 priv = netdev_priv(dev_lec[i]);
911 if (priv->lecd)
912 return -EADDRINUSE;
913 }
914 lec_arp_init(priv);
915 priv->itfnum = i; /* LANE2 addition */
916 priv->lecd = vcc;
917 vcc->dev = &lecatm_dev;
918 vcc_insert_socket(sk_atm(vcc));
919
920 vcc->proto_data = dev_lec[i];
921 set_bit(ATM_VF_META, &vcc->flags);
922 set_bit(ATM_VF_READY, &vcc->flags);
923
924 /* Set default values to these variables */
925 priv->maximum_unknown_frame_count = 1;
926 priv->max_unknown_frame_time = (1 * HZ);
927 priv->vcc_timeout_period = (1200 * HZ);
928 priv->max_retry_count = 1;
929 priv->aging_time = (300 * HZ);
930 priv->forward_delay_time = (15 * HZ);
931 priv->topology_change = 0;
932 priv->arp_response_time = (1 * HZ);
933 priv->flush_timeout = (4 * HZ);
934 priv->path_switching_delay = (6 * HZ);
935
936 if (dev_lec[i]->flags & IFF_UP) {
937 netif_start_queue(dev_lec[i]);
938 }
939 __module_get(THIS_MODULE);
940 return i;
941 }
942
943 #ifdef CONFIG_PROC_FS
944 static char *lec_arp_get_status_string(unsigned char status)
945 {
946 static char *lec_arp_status_string[] = {
947 "ESI_UNKNOWN ",
948 "ESI_ARP_PENDING ",
949 "ESI_VC_PENDING ",
950 "<Undefined> ",
951 "ESI_FLUSH_PENDING ",
952 "ESI_FORWARD_DIRECT"
953 };
954
955 if (status > ESI_FORWARD_DIRECT)
956 status = 3; /* ESI_UNDEFINED */
957 return lec_arp_status_string[status];
958 }
959
960 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
961 {
962 int i;
963
964 for (i = 0; i < ETH_ALEN; i++)
965 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
966 seq_printf(seq, " ");
967 for (i = 0; i < ATM_ESA_LEN; i++)
968 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
969 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
970 entry->flags & 0xffff);
971 if (entry->vcc)
972 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
973 else
974 seq_printf(seq, " ");
975 if (entry->recv_vcc) {
976 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
977 entry->recv_vcc->vci);
978 }
979 seq_putc(seq, '\n');
980 }
981
982 struct lec_state {
983 unsigned long flags;
984 struct lec_priv *locked;
985 struct hlist_node *node;
986 struct net_device *dev;
987 int itf;
988 int arp_table;
989 int misc_table;
990 };
991
992 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
993 loff_t *l)
994 {
995 struct hlist_node *e = state->node;
996 struct lec_arp_table *tmp;
997
998 if (!e)
999 e = tbl->first;
1000 if (e == SEQ_START_TOKEN) {
1001 e = tbl->first;
1002 --*l;
1003 }
1004
1005 hlist_for_each_entry_from(tmp, e, next) {
1006 if (--*l < 0)
1007 break;
1008 }
1009 state->node = e;
1010
1011 return (*l < 0) ? state : NULL;
1012 }
1013
1014 static void *lec_arp_walk(struct lec_state *state, loff_t *l,
1015 struct lec_priv *priv)
1016 {
1017 void *v = NULL;
1018 int p;
1019
1020 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
1021 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
1022 if (v)
1023 break;
1024 }
1025 state->arp_table = p;
1026 return v;
1027 }
1028
1029 static void *lec_misc_walk(struct lec_state *state, loff_t *l,
1030 struct lec_priv *priv)
1031 {
1032 struct hlist_head *lec_misc_tables[] = {
1033 &priv->lec_arp_empty_ones,
1034 &priv->lec_no_forward,
1035 &priv->mcast_fwds
1036 };
1037 void *v = NULL;
1038 int q;
1039
1040 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
1041 v = lec_tbl_walk(state, lec_misc_tables[q], l);
1042 if (v)
1043 break;
1044 }
1045 state->misc_table = q;
1046 return v;
1047 }
1048
1049 static void *lec_priv_walk(struct lec_state *state, loff_t *l,
1050 struct lec_priv *priv)
1051 {
1052 if (!state->locked) {
1053 state->locked = priv;
1054 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
1055 }
1056 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
1057 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
1058 state->locked = NULL;
1059 /* Partial state reset for the next time we get called */
1060 state->arp_table = state->misc_table = 0;
1061 }
1062 return state->locked;
1063 }
1064
1065 static void *lec_itf_walk(struct lec_state *state, loff_t *l)
1066 {
1067 struct net_device *dev;
1068 void *v;
1069
1070 dev = state->dev ? state->dev : dev_lec[state->itf];
1071 v = (dev && netdev_priv(dev)) ?
1072 lec_priv_walk(state, l, netdev_priv(dev)) : NULL;
1073 if (!v && dev) {
1074 dev_put(dev);
1075 /* Partial state reset for the next time we get called */
1076 dev = NULL;
1077 }
1078 state->dev = dev;
1079 return v;
1080 }
1081
1082 static void *lec_get_idx(struct lec_state *state, loff_t l)
1083 {
1084 void *v = NULL;
1085
1086 for (; state->itf < MAX_LEC_ITF; state->itf++) {
1087 v = lec_itf_walk(state, &l);
1088 if (v)
1089 break;
1090 }
1091 return v;
1092 }
1093
1094 static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
1095 {
1096 struct lec_state *state = seq->private;
1097
1098 state->itf = 0;
1099 state->dev = NULL;
1100 state->locked = NULL;
1101 state->arp_table = 0;
1102 state->misc_table = 0;
1103 state->node = SEQ_START_TOKEN;
1104
1105 return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN;
1106 }
1107
1108 static void lec_seq_stop(struct seq_file *seq, void *v)
1109 {
1110 struct lec_state *state = seq->private;
1111
1112 if (state->dev) {
1113 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
1114 state->flags);
1115 dev_put(state->dev);
1116 }
1117 }
1118
1119 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1120 {
1121 struct lec_state *state = seq->private;
1122
1123 v = lec_get_idx(state, 1);
1124 *pos += !!PTR_ERR(v);
1125 return v;
1126 }
1127
1128 static int lec_seq_show(struct seq_file *seq, void *v)
1129 {
1130 static char lec_banner[] = "Itf MAC ATM destination"
1131 " Status Flags "
1132 "VPI/VCI Recv VPI/VCI\n";
1133
1134 if (v == SEQ_START_TOKEN)
1135 seq_puts(seq, lec_banner);
1136 else {
1137 struct lec_state *state = seq->private;
1138 struct net_device *dev = state->dev;
1139 struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next);
1140
1141 seq_printf(seq, "%s ", dev->name);
1142 lec_info(seq, entry);
1143 }
1144 return 0;
1145 }
1146
1147 static const struct seq_operations lec_seq_ops = {
1148 .start = lec_seq_start,
1149 .next = lec_seq_next,
1150 .stop = lec_seq_stop,
1151 .show = lec_seq_show,
1152 };
1153
1154 static int lec_seq_open(struct inode *inode, struct file *file)
1155 {
1156 return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state));
1157 }
1158
1159 static const struct file_operations lec_seq_fops = {
1160 .owner = THIS_MODULE,
1161 .open = lec_seq_open,
1162 .read = seq_read,
1163 .llseek = seq_lseek,
1164 .release = seq_release_private,
1165 };
1166 #endif
1167
1168 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1169 {
1170 struct atm_vcc *vcc = ATM_SD(sock);
1171 int err = 0;
1172
1173 switch (cmd) {
1174 case ATMLEC_CTRL:
1175 case ATMLEC_MCAST:
1176 case ATMLEC_DATA:
1177 if (!capable(CAP_NET_ADMIN))
1178 return -EPERM;
1179 break;
1180 default:
1181 return -ENOIOCTLCMD;
1182 }
1183
1184 switch (cmd) {
1185 case ATMLEC_CTRL:
1186 err = lecd_attach(vcc, (int)arg);
1187 if (err >= 0)
1188 sock->state = SS_CONNECTED;
1189 break;
1190 case ATMLEC_MCAST:
1191 err = lec_mcast_attach(vcc, (int)arg);
1192 break;
1193 case ATMLEC_DATA:
1194 err = lec_vcc_attach(vcc, (void __user *)arg);
1195 break;
1196 }
1197
1198 return err;
1199 }
1200
1201 static struct atm_ioctl lane_ioctl_ops = {
1202 .owner = THIS_MODULE,
1203 .ioctl = lane_ioctl,
1204 };
1205
1206 static int __init lane_module_init(void)
1207 {
1208 #ifdef CONFIG_PROC_FS
1209 struct proc_dir_entry *p;
1210
1211 p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops);
1212 if (!p) {
1213 printk(KERN_ERR "Unable to initialize /proc/net/atm/lec\n");
1214 return -ENOMEM;
1215 }
1216 #endif
1217
1218 register_atm_ioctl(&lane_ioctl_ops);
1219 printk("lec.c: " __DATE__ " " __TIME__ " initialized\n");
1220 return 0;
1221 }
1222
1223 static void __exit lane_module_cleanup(void)
1224 {
1225 int i;
1226 struct lec_priv *priv;
1227
1228 remove_proc_entry("lec", atm_proc_root);
1229
1230 deregister_atm_ioctl(&lane_ioctl_ops);
1231
1232 for (i = 0; i < MAX_LEC_ITF; i++) {
1233 if (dev_lec[i] != NULL) {
1234 priv = netdev_priv(dev_lec[i]);
1235 unregister_netdev(dev_lec[i]);
1236 free_netdev(dev_lec[i]);
1237 dev_lec[i] = NULL;
1238 }
1239 }
1240
1241 return;
1242 }
1243
1244 module_init(lane_module_init);
1245 module_exit(lane_module_cleanup);
1246
1247 /*
1248 * LANE2: 3.1.3, LE_RESOLVE.request
1249 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1250 * If sizeoftlvs == NULL the default TLVs associated with with this
1251 * lec will be used.
1252 * If dst_mac == NULL, targetless LE_ARP will be sent
1253 */
1254 static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
1255 u8 **tlvs, u32 *sizeoftlvs)
1256 {
1257 unsigned long flags;
1258 struct lec_priv *priv = netdev_priv(dev);
1259 struct lec_arp_table *table;
1260 struct sk_buff *skb;
1261 int retval;
1262
1263 if (force == 0) {
1264 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1265 table = lec_arp_find(priv, dst_mac);
1266 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1267 if (table == NULL)
1268 return -1;
1269
1270 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
1271 if (*tlvs == NULL)
1272 return -1;
1273
1274 *sizeoftlvs = table->sizeoftlvs;
1275
1276 return 0;
1277 }
1278
1279 if (sizeoftlvs == NULL)
1280 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1281
1282 else {
1283 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1284 if (skb == NULL)
1285 return -1;
1286 skb->len = *sizeoftlvs;
1287 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
1288 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1289 }
1290 return retval;
1291 }
1292
1293 /*
1294 * LANE2: 3.1.4, LE_ASSOCIATE.request
1295 * Associate the *tlvs with the *lan_dst address.
1296 * Will overwrite any previous association
1297 * Returns 1 for success, 0 for failure (out of memory)
1298 *
1299 */
1300 static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
1301 const u8 *tlvs, u32 sizeoftlvs)
1302 {
1303 int retval;
1304 struct sk_buff *skb;
1305 struct lec_priv *priv = netdev_priv(dev);
1306
1307 if (compare_ether_addr(lan_dst, dev->dev_addr))
1308 return (0); /* not our mac address */
1309
1310 kfree(priv->tlvs); /* NULL if there was no previous association */
1311
1312 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1313 if (priv->tlvs == NULL)
1314 return (0);
1315 priv->sizeoftlvs = sizeoftlvs;
1316
1317 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1318 if (skb == NULL)
1319 return 0;
1320 skb->len = sizeoftlvs;
1321 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
1322 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1323 if (retval != 0)
1324 printk("lec.c: lane2_associate_req() failed\n");
1325 /*
1326 * If the previous association has changed we must
1327 * somehow notify other LANE entities about the change
1328 */
1329 return (1);
1330 }
1331
1332 /*
1333 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1334 *
1335 */
1336 static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr,
1337 const u8 *tlvs, u32 sizeoftlvs)
1338 {
1339 #if 0
1340 int i = 0;
1341 #endif
1342 struct lec_priv *priv = netdev_priv(dev);
1343 #if 0 /*
1344 * Why have the TLVs in LE_ARP entries
1345 * since we do not use them? When you
1346 * uncomment this code, make sure the
1347 * TLVs get freed when entry is killed
1348 */
1349 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1350
1351 if (entry == NULL)
1352 return; /* should not happen */
1353
1354 kfree(entry->tlvs);
1355
1356 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1357 if (entry->tlvs == NULL)
1358 return;
1359 entry->sizeoftlvs = sizeoftlvs;
1360 #endif
1361 #if 0
1362 printk("lec.c: lane2_associate_ind()\n");
1363 printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1364 while (i < sizeoftlvs)
1365 printk("%02x ", tlvs[i++]);
1366
1367 printk("\n");
1368 #endif
1369
1370 /* tell MPOA about the TLVs we saw */
1371 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1372 priv->lane2_ops->associate_indicator(dev, mac_addr,
1373 tlvs, sizeoftlvs);
1374 }
1375 return;
1376 }
1377
1378 /*
1379 * Here starts what used to lec_arpc.c
1380 *
1381 * lec_arpc.c was added here when making
1382 * lane client modular. October 1997
1383 */
1384
1385 #include <linux/types.h>
1386 #include <linux/timer.h>
1387 #include <asm/param.h>
1388 #include <asm/atomic.h>
1389 #include <linux/inetdevice.h>
1390 #include <net/route.h>
1391
1392 #if 0
1393 #define pr_debug(format,args...)
1394 /*
1395 #define pr_debug printk
1396 */
1397 #endif
1398 #define DEBUG_ARP_TABLE 0
1399
1400 #define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1401
1402 static void lec_arp_check_expire(struct work_struct *work);
1403 static void lec_arp_expire_arp(unsigned long data);
1404
1405 /*
1406 * Arp table funcs
1407 */
1408
1409 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1))
1410
1411 /*
1412 * Initialization of arp-cache
1413 */
1414 static void lec_arp_init(struct lec_priv *priv)
1415 {
1416 unsigned short i;
1417
1418 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1419 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1420 }
1421 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1422 INIT_HLIST_HEAD(&priv->lec_no_forward);
1423 INIT_HLIST_HEAD(&priv->mcast_fwds);
1424 spin_lock_init(&priv->lec_arp_lock);
1425 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
1426 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1427 }
1428
1429 static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1430 {
1431 if (entry->vcc) {
1432 struct atm_vcc *vcc = entry->vcc;
1433 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1434 struct net_device *dev = (struct net_device *)vcc->proto_data;
1435
1436 vcc->pop = vpriv->old_pop;
1437 if (vpriv->xoff)
1438 netif_wake_queue(dev);
1439 kfree(vpriv);
1440 vcc->user_back = NULL;
1441 vcc->push = entry->old_push;
1442 vcc_release_async(vcc, -EPIPE);
1443 entry->vcc = NULL;
1444 }
1445 if (entry->recv_vcc) {
1446 entry->recv_vcc->push = entry->old_recv_push;
1447 vcc_release_async(entry->recv_vcc, -EPIPE);
1448 entry->recv_vcc = NULL;
1449 }
1450 }
1451
1452 /*
1453 * Insert entry to lec_arp_table
1454 * LANE2: Add to the end of the list to satisfy 8.1.13
1455 */
1456 static inline void
1457 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1458 {
1459 struct hlist_head *tmp;
1460
1461 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1462 hlist_add_head(&entry->next, tmp);
1463
1464 pr_debug("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1465 0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1],
1466 0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3],
1467 0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]);
1468 }
1469
1470 /*
1471 * Remove entry from lec_arp_table
1472 */
1473 static int
1474 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1475 {
1476 struct hlist_node *node;
1477 struct lec_arp_table *entry;
1478 int i, remove_vcc = 1;
1479
1480 if (!to_remove) {
1481 return -1;
1482 }
1483
1484 hlist_del(&to_remove->next);
1485 del_timer(&to_remove->timer);
1486
1487 /* If this is the only MAC connected to this VCC, also tear down the VCC */
1488 if (to_remove->status >= ESI_FLUSH_PENDING) {
1489 /*
1490 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1491 */
1492 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1493 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
1494 if (memcmp(to_remove->atm_addr,
1495 entry->atm_addr, ATM_ESA_LEN) == 0) {
1496 remove_vcc = 0;
1497 break;
1498 }
1499 }
1500 }
1501 if (remove_vcc)
1502 lec_arp_clear_vccs(to_remove);
1503 }
1504 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
1505
1506 pr_debug("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1507 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1],
1508 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3],
1509 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]);
1510 return 0;
1511 }
1512
1513 #if DEBUG_ARP_TABLE
1514 static char *get_status_string(unsigned char st)
1515 {
1516 switch (st) {
1517 case ESI_UNKNOWN:
1518 return "ESI_UNKNOWN";
1519 case ESI_ARP_PENDING:
1520 return "ESI_ARP_PENDING";
1521 case ESI_VC_PENDING:
1522 return "ESI_VC_PENDING";
1523 case ESI_FLUSH_PENDING:
1524 return "ESI_FLUSH_PENDING";
1525 case ESI_FORWARD_DIRECT:
1526 return "ESI_FORWARD_DIRECT";
1527 default:
1528 return "<UNKNOWN>";
1529 }
1530 }
1531
1532 static void dump_arp_table(struct lec_priv *priv)
1533 {
1534 struct hlist_node *node;
1535 struct lec_arp_table *rulla;
1536 char buf[256];
1537 int i, j, offset;
1538
1539 printk("Dump %p:\n", priv);
1540 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1541 hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) {
1542 offset = 0;
1543 offset += sprintf(buf, "%d: %p\n", i, rulla);
1544 offset += sprintf(buf + offset, "Mac:");
1545 for (j = 0; j < ETH_ALEN; j++) {
1546 offset += sprintf(buf + offset,
1547 "%2.2x ",
1548 rulla->mac_addr[j] & 0xff);
1549 }
1550 offset += sprintf(buf + offset, "Atm:");
1551 for (j = 0; j < ATM_ESA_LEN; j++) {
1552 offset += sprintf(buf + offset,
1553 "%2.2x ",
1554 rulla->atm_addr[j] & 0xff);
1555 }
1556 offset += sprintf(buf + offset,
1557 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1558 rulla->vcc ? rulla->vcc->vpi : 0,
1559 rulla->vcc ? rulla->vcc->vci : 0,
1560 rulla->recv_vcc ? rulla->recv_vcc->
1561 vpi : 0,
1562 rulla->recv_vcc ? rulla->recv_vcc->
1563 vci : 0, rulla->last_used,
1564 rulla->timestamp, rulla->no_tries);
1565 offset +=
1566 sprintf(buf + offset,
1567 "Flags:%x, Packets_flooded:%x, Status: %s ",
1568 rulla->flags, rulla->packets_flooded,
1569 get_status_string(rulla->status));
1570 printk("%s\n", buf);
1571 }
1572 }
1573
1574 if (!hlist_empty(&priv->lec_no_forward))
1575 printk("No forward\n");
1576 hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) {
1577 offset = 0;
1578 offset += sprintf(buf + offset, "Mac:");
1579 for (j = 0; j < ETH_ALEN; j++) {
1580 offset += sprintf(buf + offset, "%2.2x ",
1581 rulla->mac_addr[j] & 0xff);
1582 }
1583 offset += sprintf(buf + offset, "Atm:");
1584 for (j = 0; j < ATM_ESA_LEN; j++) {
1585 offset += sprintf(buf + offset, "%2.2x ",
1586 rulla->atm_addr[j] & 0xff);
1587 }
1588 offset += sprintf(buf + offset,
1589 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1590 rulla->vcc ? rulla->vcc->vpi : 0,
1591 rulla->vcc ? rulla->vcc->vci : 0,
1592 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1593 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1594 rulla->last_used,
1595 rulla->timestamp, rulla->no_tries);
1596 offset += sprintf(buf + offset,
1597 "Flags:%x, Packets_flooded:%x, Status: %s ",
1598 rulla->flags, rulla->packets_flooded,
1599 get_status_string(rulla->status));
1600 printk("%s\n", buf);
1601 }
1602
1603 if (!hlist_empty(&priv->lec_arp_empty_ones))
1604 printk("Empty ones\n");
1605 hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) {
1606 offset = 0;
1607 offset += sprintf(buf + offset, "Mac:");
1608 for (j = 0; j < ETH_ALEN; j++) {
1609 offset += sprintf(buf + offset, "%2.2x ",
1610 rulla->mac_addr[j] & 0xff);
1611 }
1612 offset += sprintf(buf + offset, "Atm:");
1613 for (j = 0; j < ATM_ESA_LEN; j++) {
1614 offset += sprintf(buf + offset, "%2.2x ",
1615 rulla->atm_addr[j] & 0xff);
1616 }
1617 offset += sprintf(buf + offset,
1618 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1619 rulla->vcc ? rulla->vcc->vpi : 0,
1620 rulla->vcc ? rulla->vcc->vci : 0,
1621 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1622 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1623 rulla->last_used,
1624 rulla->timestamp, rulla->no_tries);
1625 offset += sprintf(buf + offset,
1626 "Flags:%x, Packets_flooded:%x, Status: %s ",
1627 rulla->flags, rulla->packets_flooded,
1628 get_status_string(rulla->status));
1629 printk("%s", buf);
1630 }
1631
1632 if (!hlist_empty(&priv->mcast_fwds))
1633 printk("Multicast Forward VCCs\n");
1634 hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) {
1635 offset = 0;
1636 offset += sprintf(buf + offset, "Mac:");
1637 for (j = 0; j < ETH_ALEN; j++) {
1638 offset += sprintf(buf + offset, "%2.2x ",
1639 rulla->mac_addr[j] & 0xff);
1640 }
1641 offset += sprintf(buf + offset, "Atm:");
1642 for (j = 0; j < ATM_ESA_LEN; j++) {
1643 offset += sprintf(buf + offset, "%2.2x ",
1644 rulla->atm_addr[j] & 0xff);
1645 }
1646 offset += sprintf(buf + offset,
1647 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1648 rulla->vcc ? rulla->vcc->vpi : 0,
1649 rulla->vcc ? rulla->vcc->vci : 0,
1650 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1651 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1652 rulla->last_used,
1653 rulla->timestamp, rulla->no_tries);
1654 offset += sprintf(buf + offset,
1655 "Flags:%x, Packets_flooded:%x, Status: %s ",
1656 rulla->flags, rulla->packets_flooded,
1657 get_status_string(rulla->status));
1658 printk("%s\n", buf);
1659 }
1660
1661 }
1662 #else
1663 #define dump_arp_table(priv) do { } while (0)
1664 #endif
1665
1666 /*
1667 * Destruction of arp-cache
1668 */
1669 static void lec_arp_destroy(struct lec_priv *priv)
1670 {
1671 unsigned long flags;
1672 struct hlist_node *node, *next;
1673 struct lec_arp_table *entry;
1674 int i;
1675
1676 cancel_rearming_delayed_work(&priv->lec_arp_work);
1677
1678 /*
1679 * Remove all entries
1680 */
1681
1682 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1683 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1684 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1685 lec_arp_remove(priv, entry);
1686 lec_arp_put(entry);
1687 }
1688 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1689 }
1690
1691 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
1692 del_timer_sync(&entry->timer);
1693 lec_arp_clear_vccs(entry);
1694 hlist_del(&entry->next);
1695 lec_arp_put(entry);
1696 }
1697 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1698
1699 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
1700 del_timer_sync(&entry->timer);
1701 lec_arp_clear_vccs(entry);
1702 hlist_del(&entry->next);
1703 lec_arp_put(entry);
1704 }
1705 INIT_HLIST_HEAD(&priv->lec_no_forward);
1706
1707 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
1708 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1709 lec_arp_clear_vccs(entry);
1710 hlist_del(&entry->next);
1711 lec_arp_put(entry);
1712 }
1713 INIT_HLIST_HEAD(&priv->mcast_fwds);
1714 priv->mcast_vcc = NULL;
1715 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1716 }
1717
1718 /*
1719 * Find entry by mac_address
1720 */
1721 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1722 const unsigned char *mac_addr)
1723 {
1724 struct hlist_node *node;
1725 struct hlist_head *head;
1726 struct lec_arp_table *entry;
1727
1728 pr_debug("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1729 mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff,
1730 mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff);
1731
1732 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1733 hlist_for_each_entry(entry, node, head, next) {
1734 if (!compare_ether_addr(mac_addr, entry->mac_addr)) {
1735 return entry;
1736 }
1737 }
1738 return NULL;
1739 }
1740
1741 static struct lec_arp_table *make_entry(struct lec_priv *priv,
1742 const unsigned char *mac_addr)
1743 {
1744 struct lec_arp_table *to_return;
1745
1746 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1747 if (!to_return) {
1748 printk("LEC: Arp entry kmalloc failed\n");
1749 return NULL;
1750 }
1751 memcpy(to_return->mac_addr, mac_addr, ETH_ALEN);
1752 INIT_HLIST_NODE(&to_return->next);
1753 setup_timer(&to_return->timer, lec_arp_expire_arp,
1754 (unsigned long)to_return);
1755 to_return->last_used = jiffies;
1756 to_return->priv = priv;
1757 skb_queue_head_init(&to_return->tx_wait);
1758 atomic_set(&to_return->usage, 1);
1759 return to_return;
1760 }
1761
1762 /* Arp sent timer expired */
1763 static void lec_arp_expire_arp(unsigned long data)
1764 {
1765 struct lec_arp_table *entry;
1766
1767 entry = (struct lec_arp_table *)data;
1768
1769 pr_debug("lec_arp_expire_arp\n");
1770 if (entry->status == ESI_ARP_PENDING) {
1771 if (entry->no_tries <= entry->priv->max_retry_count) {
1772 if (entry->is_rdesc)
1773 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1774 entry->mac_addr, NULL, NULL);
1775 else
1776 send_to_lecd(entry->priv, l_arp_xmt,
1777 entry->mac_addr, NULL, NULL);
1778 entry->no_tries++;
1779 }
1780 mod_timer(&entry->timer, jiffies + (1 * HZ));
1781 }
1782 }
1783
1784 /* Unknown/unused vcc expire, remove associated entry */
1785 static void lec_arp_expire_vcc(unsigned long data)
1786 {
1787 unsigned long flags;
1788 struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1789 struct lec_priv *priv = (struct lec_priv *)to_remove->priv;
1790
1791 del_timer(&to_remove->timer);
1792
1793 pr_debug("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n",
1794 to_remove, priv,
1795 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1796 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1797
1798 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1799 hlist_del(&to_remove->next);
1800 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1801
1802 lec_arp_clear_vccs(to_remove);
1803 lec_arp_put(to_remove);
1804 }
1805
1806 /*
1807 * Expire entries.
1808 * 1. Re-set timer
1809 * 2. For each entry, delete entries that have aged past the age limit.
1810 * 3. For each entry, depending on the status of the entry, perform
1811 * the following maintenance.
1812 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1813 * tick_count is above the max_unknown_frame_time, clear
1814 * the tick_count to zero and clear the packets_flooded counter
1815 * to zero. This supports the packet rate limit per address
1816 * while flooding unknowns.
1817 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1818 * than or equal to the path_switching_delay, change the status
1819 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1820 * regardless of the progress of the flush protocol.
1821 */
1822 static void lec_arp_check_expire(struct work_struct *work)
1823 {
1824 unsigned long flags;
1825 struct lec_priv *priv =
1826 container_of(work, struct lec_priv, lec_arp_work.work);
1827 struct hlist_node *node, *next;
1828 struct lec_arp_table *entry;
1829 unsigned long now;
1830 unsigned long time_to_check;
1831 int i;
1832
1833 pr_debug("lec_arp_check_expire %p\n", priv);
1834 now = jiffies;
1835 restart:
1836 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1837 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1838 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1839 if ((entry->flags) & LEC_REMOTE_FLAG &&
1840 priv->topology_change)
1841 time_to_check = priv->forward_delay_time;
1842 else
1843 time_to_check = priv->aging_time;
1844
1845 pr_debug("About to expire: %lx - %lx > %lx\n",
1846 now, entry->last_used, time_to_check);
1847 if (time_after(now, entry->last_used + time_to_check)
1848 && !(entry->flags & LEC_PERMANENT_FLAG)
1849 && !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
1850 /* Remove entry */
1851 pr_debug("LEC:Entry timed out\n");
1852 lec_arp_remove(priv, entry);
1853 lec_arp_put(entry);
1854 } else {
1855 /* Something else */
1856 if ((entry->status == ESI_VC_PENDING ||
1857 entry->status == ESI_ARP_PENDING)
1858 && time_after_eq(now,
1859 entry->timestamp +
1860 priv->
1861 max_unknown_frame_time)) {
1862 entry->timestamp = jiffies;
1863 entry->packets_flooded = 0;
1864 if (entry->status == ESI_VC_PENDING)
1865 send_to_lecd(priv, l_svc_setup,
1866 entry->mac_addr,
1867 entry->atm_addr,
1868 NULL);
1869 }
1870 if (entry->status == ESI_FLUSH_PENDING
1871 &&
1872 time_after_eq(now, entry->timestamp +
1873 priv->path_switching_delay)) {
1874 struct sk_buff *skb;
1875 struct atm_vcc *vcc = entry->vcc;
1876
1877 lec_arp_hold(entry);
1878 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1879 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
1880 lec_send(vcc, skb);
1881 entry->last_used = jiffies;
1882 entry->status = ESI_FORWARD_DIRECT;
1883 lec_arp_put(entry);
1884 goto restart;
1885 }
1886 }
1887 }
1888 }
1889 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1890
1891 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1892 }
1893
1894 /*
1895 * Try to find vcc where mac_address is attached.
1896 *
1897 */
1898 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1899 const unsigned char *mac_to_find, int is_rdesc,
1900 struct lec_arp_table **ret_entry)
1901 {
1902 unsigned long flags;
1903 struct lec_arp_table *entry;
1904 struct atm_vcc *found;
1905
1906 if (mac_to_find[0] & 0x01) {
1907 switch (priv->lane_version) {
1908 case 1:
1909 return priv->mcast_vcc;
1910 case 2: /* LANE2 wants arp for multicast addresses */
1911 if (!compare_ether_addr(mac_to_find, bus_mac))
1912 return priv->mcast_vcc;
1913 break;
1914 default:
1915 break;
1916 }
1917 }
1918
1919 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1920 entry = lec_arp_find(priv, mac_to_find);
1921
1922 if (entry) {
1923 if (entry->status == ESI_FORWARD_DIRECT) {
1924 /* Connection Ok */
1925 entry->last_used = jiffies;
1926 lec_arp_hold(entry);
1927 *ret_entry = entry;
1928 found = entry->vcc;
1929 goto out;
1930 }
1931 /*
1932 * If the LE_ARP cache entry is still pending, reset count to 0
1933 * so another LE_ARP request can be made for this frame.
1934 */
1935 if (entry->status == ESI_ARP_PENDING) {
1936 entry->no_tries = 0;
1937 }
1938 /*
1939 * Data direct VC not yet set up, check to see if the unknown
1940 * frame count is greater than the limit. If the limit has
1941 * not been reached, allow the caller to send packet to
1942 * BUS.
1943 */
1944 if (entry->status != ESI_FLUSH_PENDING &&
1945 entry->packets_flooded <
1946 priv->maximum_unknown_frame_count) {
1947 entry->packets_flooded++;
1948 pr_debug("LEC_ARP: Flooding..\n");
1949 found = priv->mcast_vcc;
1950 goto out;
1951 }
1952 /*
1953 * We got here because entry->status == ESI_FLUSH_PENDING
1954 * or BUS flood limit was reached for an entry which is
1955 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
1956 */
1957 lec_arp_hold(entry);
1958 *ret_entry = entry;
1959 pr_debug("lec: entry->status %d entry->vcc %p\n", entry->status,
1960 entry->vcc);
1961 found = NULL;
1962 } else {
1963 /* No matching entry was found */
1964 entry = make_entry(priv, mac_to_find);
1965 pr_debug("LEC_ARP: Making entry\n");
1966 if (!entry) {
1967 found = priv->mcast_vcc;
1968 goto out;
1969 }
1970 lec_arp_add(priv, entry);
1971 /* We want arp-request(s) to be sent */
1972 entry->packets_flooded = 1;
1973 entry->status = ESI_ARP_PENDING;
1974 entry->no_tries = 1;
1975 entry->last_used = entry->timestamp = jiffies;
1976 entry->is_rdesc = is_rdesc;
1977 if (entry->is_rdesc)
1978 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
1979 NULL);
1980 else
1981 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
1982 entry->timer.expires = jiffies + (1 * HZ);
1983 entry->timer.function = lec_arp_expire_arp;
1984 add_timer(&entry->timer);
1985 found = priv->mcast_vcc;
1986 }
1987
1988 out:
1989 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1990 return found;
1991 }
1992
1993 static int
1994 lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
1995 unsigned long permanent)
1996 {
1997 unsigned long flags;
1998 struct hlist_node *node, *next;
1999 struct lec_arp_table *entry;
2000 int i;
2001
2002 pr_debug("lec_addr_delete\n");
2003 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2004 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2005 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2006 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)
2007 && (permanent ||
2008 !(entry->flags & LEC_PERMANENT_FLAG))) {
2009 lec_arp_remove(priv, entry);
2010 lec_arp_put(entry);
2011 }
2012 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2013 return 0;
2014 }
2015 }
2016 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2017 return -1;
2018 }
2019
2020 /*
2021 * Notifies: Response to arp_request (atm_addr != NULL)
2022 */
2023 static void
2024 lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
2025 const unsigned char *atm_addr, unsigned long remoteflag,
2026 unsigned int targetless_le_arp)
2027 {
2028 unsigned long flags;
2029 struct hlist_node *node, *next;
2030 struct lec_arp_table *entry, *tmp;
2031 int i;
2032
2033 pr_debug("lec:%s", (targetless_le_arp) ? "targetless " : " ");
2034 pr_debug("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2035 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3],
2036 mac_addr[4], mac_addr[5]);
2037
2038 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2039 entry = lec_arp_find(priv, mac_addr);
2040 if (entry == NULL && targetless_le_arp)
2041 goto out; /*
2042 * LANE2: ignore targetless LE_ARPs for which
2043 * we have no entry in the cache. 7.1.30
2044 */
2045 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
2046 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2047 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
2048 hlist_del(&entry->next);
2049 del_timer(&entry->timer);
2050 tmp = lec_arp_find(priv, mac_addr);
2051 if (tmp) {
2052 del_timer(&tmp->timer);
2053 tmp->status = ESI_FORWARD_DIRECT;
2054 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
2055 tmp->vcc = entry->vcc;
2056 tmp->old_push = entry->old_push;
2057 tmp->last_used = jiffies;
2058 del_timer(&entry->timer);
2059 lec_arp_put(entry);
2060 entry = tmp;
2061 } else {
2062 entry->status = ESI_FORWARD_DIRECT;
2063 memcpy(entry->mac_addr, mac_addr, ETH_ALEN);
2064 entry->last_used = jiffies;
2065 lec_arp_add(priv, entry);
2066 }
2067 if (remoteflag)
2068 entry->flags |= LEC_REMOTE_FLAG;
2069 else
2070 entry->flags &= ~LEC_REMOTE_FLAG;
2071 pr_debug("After update\n");
2072 dump_arp_table(priv);
2073 goto out;
2074 }
2075 }
2076 }
2077
2078 entry = lec_arp_find(priv, mac_addr);
2079 if (!entry) {
2080 entry = make_entry(priv, mac_addr);
2081 if (!entry)
2082 goto out;
2083 entry->status = ESI_UNKNOWN;
2084 lec_arp_add(priv, entry);
2085 /* Temporary, changes before end of function */
2086 }
2087 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
2088 del_timer(&entry->timer);
2089 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2090 hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) {
2091 if (entry != tmp &&
2092 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
2093 /* Vcc to this host exists */
2094 if (tmp->status > ESI_VC_PENDING) {
2095 /*
2096 * ESI_FLUSH_PENDING,
2097 * ESI_FORWARD_DIRECT
2098 */
2099 entry->vcc = tmp->vcc;
2100 entry->old_push = tmp->old_push;
2101 }
2102 entry->status = tmp->status;
2103 break;
2104 }
2105 }
2106 }
2107 if (remoteflag)
2108 entry->flags |= LEC_REMOTE_FLAG;
2109 else
2110 entry->flags &= ~LEC_REMOTE_FLAG;
2111 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
2112 entry->status = ESI_VC_PENDING;
2113 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
2114 }
2115 pr_debug("After update2\n");
2116 dump_arp_table(priv);
2117 out:
2118 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2119 }
2120
2121 /*
2122 * Notifies: Vcc setup ready
2123 */
2124 static void
2125 lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
2126 struct atm_vcc *vcc,
2127 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
2128 {
2129 unsigned long flags;
2130 struct hlist_node *node;
2131 struct lec_arp_table *entry;
2132 int i, found_entry = 0;
2133
2134 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2135 if (ioc_data->receive == 2) {
2136 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
2137
2138 pr_debug("LEC_ARP: Attaching mcast forward\n");
2139 #if 0
2140 entry = lec_arp_find(priv, bus_mac);
2141 if (!entry) {
2142 printk("LEC_ARP: Multicast entry not found!\n");
2143 goto out;
2144 }
2145 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2146 entry->recv_vcc = vcc;
2147 entry->old_recv_push = old_push;
2148 #endif
2149 entry = make_entry(priv, bus_mac);
2150 if (entry == NULL)
2151 goto out;
2152 del_timer(&entry->timer);
2153 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2154 entry->recv_vcc = vcc;
2155 entry->old_recv_push = old_push;
2156 hlist_add_head(&entry->next, &priv->mcast_fwds);
2157 goto out;
2158 } else if (ioc_data->receive == 1) {
2159 /*
2160 * Vcc which we don't want to make default vcc,
2161 * attach it anyway.
2162 */
2163 pr_debug
2164 ("LEC_ARP:Attaching data direct, not default: "
2165 "%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2166 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2167 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2168 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2169 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2170 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2171 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2172 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2173 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2174 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2175 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2176 entry = make_entry(priv, bus_mac);
2177 if (entry == NULL)
2178 goto out;
2179 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2180 memset(entry->mac_addr, 0, ETH_ALEN);
2181 entry->recv_vcc = vcc;
2182 entry->old_recv_push = old_push;
2183 entry->status = ESI_UNKNOWN;
2184 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2185 entry->timer.function = lec_arp_expire_vcc;
2186 hlist_add_head(&entry->next, &priv->lec_no_forward);
2187 add_timer(&entry->timer);
2188 dump_arp_table(priv);
2189 goto out;
2190 }
2191 pr_debug
2192 ("LEC_ARP:Attaching data direct, default: "
2193 "%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2194 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2195 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2196 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2197 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2198 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2199 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2200 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2201 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2202 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2203 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2204 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2205 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2206 if (memcmp
2207 (ioc_data->atm_addr, entry->atm_addr,
2208 ATM_ESA_LEN) == 0) {
2209 pr_debug("LEC_ARP: Attaching data direct\n");
2210 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
2211 entry->vcc ? entry->vcc->vci : 0,
2212 entry->recv_vcc ? entry->recv_vcc->
2213 vci : 0);
2214 found_entry = 1;
2215 del_timer(&entry->timer);
2216 entry->vcc = vcc;
2217 entry->old_push = old_push;
2218 if (entry->status == ESI_VC_PENDING) {
2219 if (priv->maximum_unknown_frame_count
2220 == 0)
2221 entry->status =
2222 ESI_FORWARD_DIRECT;
2223 else {
2224 entry->timestamp = jiffies;
2225 entry->status =
2226 ESI_FLUSH_PENDING;
2227 #if 0
2228 send_to_lecd(priv, l_flush_xmt,
2229 NULL,
2230 entry->atm_addr,
2231 NULL);
2232 #endif
2233 }
2234 } else {
2235 /*
2236 * They were forming a connection
2237 * to us, and we to them. Our
2238 * ATM address is numerically lower
2239 * than theirs, so we make connection
2240 * we formed into default VCC (8.1.11).
2241 * Connection they made gets torn
2242 * down. This might confuse some
2243 * clients. Can be changed if
2244 * someone reports trouble...
2245 */
2246 ;
2247 }
2248 }
2249 }
2250 }
2251 if (found_entry) {
2252 pr_debug("After vcc was added\n");
2253 dump_arp_table(priv);
2254 goto out;
2255 }
2256 /*
2257 * Not found, snatch address from first data packet that arrives
2258 * from this vcc
2259 */
2260 entry = make_entry(priv, bus_mac);
2261 if (!entry)
2262 goto out;
2263 entry->vcc = vcc;
2264 entry->old_push = old_push;
2265 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2266 memset(entry->mac_addr, 0, ETH_ALEN);
2267 entry->status = ESI_UNKNOWN;
2268 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2269 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2270 entry->timer.function = lec_arp_expire_vcc;
2271 add_timer(&entry->timer);
2272 pr_debug("After vcc was added\n");
2273 dump_arp_table(priv);
2274 out:
2275 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2276 }
2277
2278 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2279 {
2280 unsigned long flags;
2281 struct hlist_node *node;
2282 struct lec_arp_table *entry;
2283 int i;
2284
2285 pr_debug("LEC:lec_flush_complete %lx\n", tran_id);
2286 restart:
2287 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2288 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2289 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2290 if (entry->flush_tran_id == tran_id
2291 && entry->status == ESI_FLUSH_PENDING) {
2292 struct sk_buff *skb;
2293 struct atm_vcc *vcc = entry->vcc;
2294
2295 lec_arp_hold(entry);
2296 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2297 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
2298 lec_send(vcc, skb);
2299 entry->last_used = jiffies;
2300 entry->status = ESI_FORWARD_DIRECT;
2301 lec_arp_put(entry);
2302 pr_debug("LEC_ARP: Flushed\n");
2303 goto restart;
2304 }
2305 }
2306 }
2307 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2308 dump_arp_table(priv);
2309 }
2310
2311 static void
2312 lec_set_flush_tran_id(struct lec_priv *priv,
2313 const unsigned char *atm_addr, unsigned long tran_id)
2314 {
2315 unsigned long flags;
2316 struct hlist_node *node;
2317 struct lec_arp_table *entry;
2318 int i;
2319
2320 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2321 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2322 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2323 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2324 entry->flush_tran_id = tran_id;
2325 pr_debug("Set flush transaction id to %lx for %p\n",
2326 tran_id, entry);
2327 }
2328 }
2329 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2330 }
2331
2332 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2333 {
2334 unsigned long flags;
2335 unsigned char mac_addr[] = {
2336 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2337 };
2338 struct lec_arp_table *to_add;
2339 struct lec_vcc_priv *vpriv;
2340 int err = 0;
2341
2342 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
2343 return -ENOMEM;
2344 vpriv->xoff = 0;
2345 vpriv->old_pop = vcc->pop;
2346 vcc->user_back = vpriv;
2347 vcc->pop = lec_pop;
2348 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2349 to_add = make_entry(priv, mac_addr);
2350 if (!to_add) {
2351 vcc->pop = vpriv->old_pop;
2352 kfree(vpriv);
2353 err = -ENOMEM;
2354 goto out;
2355 }
2356 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2357 to_add->status = ESI_FORWARD_DIRECT;
2358 to_add->flags |= LEC_PERMANENT_FLAG;
2359 to_add->vcc = vcc;
2360 to_add->old_push = vcc->push;
2361 vcc->push = lec_push;
2362 priv->mcast_vcc = vcc;
2363 lec_arp_add(priv, to_add);
2364 out:
2365 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2366 return err;
2367 }
2368
2369 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2370 {
2371 unsigned long flags;
2372 struct hlist_node *node, *next;
2373 struct lec_arp_table *entry;
2374 int i;
2375
2376 pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2377 dump_arp_table(priv);
2378
2379 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2380
2381 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2382 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2383 if (vcc == entry->vcc) {
2384 lec_arp_remove(priv, entry);
2385 lec_arp_put(entry);
2386 if (priv->mcast_vcc == vcc) {
2387 priv->mcast_vcc = NULL;
2388 }
2389 }
2390 }
2391 }
2392
2393 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2394 if (entry->vcc == vcc) {
2395 lec_arp_clear_vccs(entry);
2396 del_timer(&entry->timer);
2397 hlist_del(&entry->next);
2398 lec_arp_put(entry);
2399 }
2400 }
2401
2402 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
2403 if (entry->recv_vcc == vcc) {
2404 lec_arp_clear_vccs(entry);
2405 del_timer(&entry->timer);
2406 hlist_del(&entry->next);
2407 lec_arp_put(entry);
2408 }
2409 }
2410
2411 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
2412 if (entry->recv_vcc == vcc) {
2413 lec_arp_clear_vccs(entry);
2414 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2415 hlist_del(&entry->next);
2416 lec_arp_put(entry);
2417 }
2418 }
2419
2420 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2421 dump_arp_table(priv);
2422 }
2423
2424 static void
2425 lec_arp_check_empties(struct lec_priv *priv,
2426 struct atm_vcc *vcc, struct sk_buff *skb)
2427 {
2428 unsigned long flags;
2429 struct hlist_node *node, *next;
2430 struct lec_arp_table *entry, *tmp;
2431 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2432 unsigned char *src;
2433 #ifdef CONFIG_TR
2434 struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;
2435
2436 if (priv->is_trdev)
2437 src = tr_hdr->h_source;
2438 else
2439 #endif
2440 src = hdr->h_source;
2441
2442 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2443 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2444 if (vcc == entry->vcc) {
2445 del_timer(&entry->timer);
2446 memcpy(entry->mac_addr, src, ETH_ALEN);
2447 entry->status = ESI_FORWARD_DIRECT;
2448 entry->last_used = jiffies;
2449 /* We might have got an entry */
2450 if ((tmp = lec_arp_find(priv, src))) {
2451 lec_arp_remove(priv, tmp);
2452 lec_arp_put(tmp);
2453 }
2454 hlist_del(&entry->next);
2455 lec_arp_add(priv, entry);
2456 goto out;
2457 }
2458 }
2459 pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
2460 out:
2461 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2462 }
2463
2464 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards