?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Linux 2.6.17.7
[linux/fpc-iii.git] / drivers / ieee1394 / eth1394.c
blob30fa0d43a43a05f62ec89cf783b3fa26ad9899c6
1 /*
2 * eth1394.c -- Ethernet driver for Linux IEEE-1394 Subsystem
3 *
4 * Copyright (C) 2001-2003 Ben Collins <bcollins@debian.org>
5 * 2000 Bonin Franck <boninf@free.fr>
6 * 2003 Steve Kinneberg <kinnebergsteve@acmsystems.com>
7 *
8 * Mainly based on work by Emanuel Pirker and Andreas E. Bombe
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software Foundation,
22 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 */
24
25 /* This driver intends to support RFC 2734, which describes a method for
26 * transporting IPv4 datagrams over IEEE-1394 serial busses. This driver
27 * will ultimately support that method, but currently falls short in
28 * several areas.
29 *
30 * TODO:
31 * RFC 2734 related:
32 * - Add MCAP. Limited Multicast exists only to 224.0.0.1 and 224.0.0.2.
33 *
34 * Non-RFC 2734 related:
35 * - Handle fragmented skb's coming from the networking layer.
36 * - Move generic GASP reception to core 1394 code
37 * - Convert kmalloc/kfree for link fragments to use kmem_cache_* instead
38 * - Stability improvements
39 * - Performance enhancements
40 * - Consider garbage collecting old partial datagrams after X amount of time
41 */
42
43
44 #include <linux/module.h>
45
46 #include <linux/sched.h>
47 #include <linux/kernel.h>
48 #include <linux/slab.h>
49 #include <linux/errno.h>
50 #include <linux/types.h>
51 #include <linux/delay.h>
52 #include <linux/init.h>
53
54 #include <linux/netdevice.h>
55 #include <linux/inetdevice.h>
56 #include <linux/etherdevice.h>
57 #include <linux/if_arp.h>
58 #include <linux/if_ether.h>
59 #include <linux/ip.h>
60 #include <linux/in.h>
61 #include <linux/tcp.h>
62 #include <linux/skbuff.h>
63 #include <linux/bitops.h>
64 #include <linux/ethtool.h>
65 #include <asm/uaccess.h>
66 #include <asm/delay.h>
67 #include <asm/semaphore.h>
68 #include <net/arp.h>
69
70 #include "csr1212.h"
71 #include "ieee1394_types.h"
72 #include "ieee1394_core.h"
73 #include "ieee1394_transactions.h"
74 #include "ieee1394.h"
75 #include "highlevel.h"
76 #include "iso.h"
77 #include "nodemgr.h"
78 #include "eth1394.h"
79 #include "config_roms.h"
80
81 #define ETH1394_PRINT_G(level, fmt, args...) \
82 printk(level "%s: " fmt, driver_name, ## args)
83
84 #define ETH1394_PRINT(level, dev_name, fmt, args...) \
85 printk(level "%s: %s: " fmt, driver_name, dev_name, ## args)
86
87 #define DEBUG(fmt, args...) \
88 printk(KERN_ERR "%s:%s[%d]: " fmt "\n", driver_name, __FUNCTION__, __LINE__, ## args)
89 #define TRACE() printk(KERN_ERR "%s:%s[%d] ---- TRACE\n", driver_name, __FUNCTION__, __LINE__)
90
91 struct fragment_info {
92 struct list_head list;
93 int offset;
94 int len;
95 };
96
97 struct partial_datagram {
98 struct list_head list;
99 u16 dgl;
100 u16 dg_size;
101 u16 ether_type;
102 struct sk_buff *skb;
103 char *pbuf;
104 struct list_head frag_info;
105 };
106
107 struct pdg_list {
108 struct list_head list; /* partial datagram list per node */
109 unsigned int sz; /* partial datagram list size per node */
110 spinlock_t lock; /* partial datagram lock */
111 };
112
113 struct eth1394_host_info {
114 struct hpsb_host *host;
115 struct net_device *dev;
116 };
117
118 struct eth1394_node_ref {
119 struct unit_directory *ud;
120 struct list_head list;
121 };
122
123 struct eth1394_node_info {
124 u16 maxpayload; /* Max payload */
125 u8 sspd; /* Max speed */
126 u64 fifo; /* FIFO address */
127 struct pdg_list pdg; /* partial RX datagram lists */
128 int dgl; /* Outgoing datagram label */
129 };
130
131 /* Our ieee1394 highlevel driver */
132 #define ETH1394_DRIVER_NAME "eth1394"
133 static const char driver_name[] = ETH1394_DRIVER_NAME;
134
135 static kmem_cache_t *packet_task_cache;
136
137 static struct hpsb_highlevel eth1394_highlevel;
138
139 /* Use common.lf to determine header len */
140 static const int hdr_type_len[] = {
141 sizeof (struct eth1394_uf_hdr),
142 sizeof (struct eth1394_ff_hdr),
143 sizeof (struct eth1394_sf_hdr),
144 sizeof (struct eth1394_sf_hdr)
145 };
146
147 /* Change this to IEEE1394_SPEED_S100 to make testing easier */
148 #define ETH1394_SPEED_DEF IEEE1394_SPEED_MAX
149
150 /* For now, this needs to be 1500, so that XP works with us */
151 #define ETH1394_DATA_LEN ETH_DATA_LEN
152
153 static const u16 eth1394_speedto_maxpayload[] = {
154 /* S100, S200, S400, S800, S1600, S3200 */
155 512, 1024, 2048, 4096, 4096, 4096
156 };
157
158 MODULE_AUTHOR("Ben Collins (bcollins@debian.org)");
159 MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)");
160 MODULE_LICENSE("GPL");
161
162 /* The max_partial_datagrams parameter is the maximum number of fragmented
163 * datagrams per node that eth1394 will keep in memory. Providing an upper
164 * bound allows us to limit the amount of memory that partial datagrams
165 * consume in the event that some partial datagrams are never completed.
166 */
167 static int max_partial_datagrams = 25;
168 module_param(max_partial_datagrams, int, S_IRUGO | S_IWUSR);
169 MODULE_PARM_DESC(max_partial_datagrams,
170 "Maximum number of partially received fragmented datagrams "
171 "(default = 25).");
172
173
174 static int ether1394_header(struct sk_buff *skb, struct net_device *dev,
175 unsigned short type, void *daddr, void *saddr,
176 unsigned len);
177 static int ether1394_rebuild_header(struct sk_buff *skb);
178 static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr);
179 static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh);
180 static void ether1394_header_cache_update(struct hh_cache *hh,
181 struct net_device *dev,
182 unsigned char * haddr);
183 static int ether1394_mac_addr(struct net_device *dev, void *p);
184
185 static void purge_partial_datagram(struct list_head *old);
186 static int ether1394_tx(struct sk_buff *skb, struct net_device *dev);
187 static void ether1394_iso(struct hpsb_iso *iso);
188
189 static struct ethtool_ops ethtool_ops;
190
191 static int ether1394_write(struct hpsb_host *host, int srcid, int destid,
192 quadlet_t *data, u64 addr, size_t len, u16 flags);
193 static void ether1394_add_host (struct hpsb_host *host);
194 static void ether1394_remove_host (struct hpsb_host *host);
195 static void ether1394_host_reset (struct hpsb_host *host);
196
197 /* Function for incoming 1394 packets */
198 static struct hpsb_address_ops addr_ops = {
199 .write = ether1394_write,
200 };
201
202 /* Ieee1394 highlevel driver functions */
203 static struct hpsb_highlevel eth1394_highlevel = {
204 .name = driver_name,
205 .add_host = ether1394_add_host,
206 .remove_host = ether1394_remove_host,
207 .host_reset = ether1394_host_reset,
208 };
209
210
211 /* This is called after an "ifup" */
212 static int ether1394_open (struct net_device *dev)
213 {
214 struct eth1394_priv *priv = netdev_priv(dev);
215 int ret = 0;
216
217 /* Something bad happened, don't even try */
218 if (priv->bc_state == ETHER1394_BC_ERROR) {
219 /* we'll try again */
220 priv->iso = hpsb_iso_recv_init(priv->host,
221 ETHER1394_ISO_BUF_SIZE,
222 ETHER1394_GASP_BUFFERS,
223 priv->broadcast_channel,
224 HPSB_ISO_DMA_PACKET_PER_BUFFER,
225 1, ether1394_iso);
226 if (priv->iso == NULL) {
227 ETH1394_PRINT(KERN_ERR, dev->name,
228 "Could not allocate isochronous receive "
229 "context for the broadcast channel\n");
230 priv->bc_state = ETHER1394_BC_ERROR;
231 ret = -EAGAIN;
232 } else {
233 if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0)
234 priv->bc_state = ETHER1394_BC_STOPPED;
235 else
236 priv->bc_state = ETHER1394_BC_RUNNING;
237 }
238 }
239
240 if (ret)
241 return ret;
242
243 netif_start_queue (dev);
244 return 0;
245 }
246
247 /* This is called after an "ifdown" */
248 static int ether1394_stop (struct net_device *dev)
249 {
250 netif_stop_queue (dev);
251 return 0;
252 }
253
254 /* Return statistics to the caller */
255 static struct net_device_stats *ether1394_stats (struct net_device *dev)
256 {
257 return &(((struct eth1394_priv *)netdev_priv(dev))->stats);
258 }
259
260 /* What to do if we timeout. I think a host reset is probably in order, so
261 * that's what we do. Should we increment the stat counters too? */
262 static void ether1394_tx_timeout (struct net_device *dev)
263 {
264 ETH1394_PRINT (KERN_ERR, dev->name, "Timeout, resetting host %s\n",
265 ((struct eth1394_priv *)netdev_priv(dev))->host->driver->name);
266
267 highlevel_host_reset (((struct eth1394_priv *)netdev_priv(dev))->host);
268
269 netif_wake_queue (dev);
270 }
271
272 static int ether1394_change_mtu(struct net_device *dev, int new_mtu)
273 {
274 struct eth1394_priv *priv = netdev_priv(dev);
275
276 if ((new_mtu < 68) ||
277 (new_mtu > min(ETH1394_DATA_LEN,
278 (int)((1 << (priv->host->csr.max_rec + 1)) -
279 (sizeof(union eth1394_hdr) +
280 ETHER1394_GASP_OVERHEAD)))))
281 return -EINVAL;
282 dev->mtu = new_mtu;
283 return 0;
284 }
285
286 static void purge_partial_datagram(struct list_head *old)
287 {
288 struct partial_datagram *pd = list_entry(old, struct partial_datagram, list);
289 struct list_head *lh, *n;
290
291 list_for_each_safe(lh, n, &pd->frag_info) {
292 struct fragment_info *fi = list_entry(lh, struct fragment_info, list);
293 list_del(lh);
294 kfree(fi);
295 }
296 list_del(old);
297 kfree_skb(pd->skb);
298 kfree(pd);
299 }
300
301 /******************************************
302 * 1394 bus activity functions
303 ******************************************/
304
305 static struct eth1394_node_ref *eth1394_find_node(struct list_head *inl,
306 struct unit_directory *ud)
307 {
308 struct eth1394_node_ref *node;
309
310 list_for_each_entry(node, inl, list)
311 if (node->ud == ud)
312 return node;
313
314 return NULL;
315 }
316
317 static struct eth1394_node_ref *eth1394_find_node_guid(struct list_head *inl,
318 u64 guid)
319 {
320 struct eth1394_node_ref *node;
321
322 list_for_each_entry(node, inl, list)
323 if (node->ud->ne->guid == guid)
324 return node;
325
326 return NULL;
327 }
328
329 static struct eth1394_node_ref *eth1394_find_node_nodeid(struct list_head *inl,
330 nodeid_t nodeid)
331 {
332 struct eth1394_node_ref *node;
333 list_for_each_entry(node, inl, list) {
334 if (node->ud->ne->nodeid == nodeid)
335 return node;
336 }
337
338 return NULL;
339 }
340
341 static int eth1394_probe(struct device *dev)
342 {
343 struct unit_directory *ud;
344 struct eth1394_host_info *hi;
345 struct eth1394_priv *priv;
346 struct eth1394_node_ref *new_node;
347 struct eth1394_node_info *node_info;
348
349 ud = container_of(dev, struct unit_directory, device);
350
351 hi = hpsb_get_hostinfo(&eth1394_highlevel, ud->ne->host);
352 if (!hi)
353 return -ENOENT;
354
355 new_node = kmalloc(sizeof(*new_node),
356 in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
357 if (!new_node)
358 return -ENOMEM;
359
360 node_info = kmalloc(sizeof(*node_info),
361 in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
362 if (!node_info) {
363 kfree(new_node);
364 return -ENOMEM;
365 }
366
367 spin_lock_init(&node_info->pdg.lock);
368 INIT_LIST_HEAD(&node_info->pdg.list);
369 node_info->pdg.sz = 0;
370 node_info->fifo = ETHER1394_INVALID_ADDR;
371
372 ud->device.driver_data = node_info;
373 new_node->ud = ud;
374
375 priv = netdev_priv(hi->dev);
376 list_add_tail(&new_node->list, &priv->ip_node_list);
377
378 return 0;
379 }
380
381 static int eth1394_remove(struct device *dev)
382 {
383 struct unit_directory *ud;
384 struct eth1394_host_info *hi;
385 struct eth1394_priv *priv;
386 struct eth1394_node_ref *old_node;
387 struct eth1394_node_info *node_info;
388 struct list_head *lh, *n;
389 unsigned long flags;
390
391 ud = container_of(dev, struct unit_directory, device);
392 hi = hpsb_get_hostinfo(&eth1394_highlevel, ud->ne->host);
393 if (!hi)
394 return -ENOENT;
395
396 priv = netdev_priv(hi->dev);
397
398 old_node = eth1394_find_node(&priv->ip_node_list, ud);
399
400 if (old_node) {
401 list_del(&old_node->list);
402 kfree(old_node);
403
404 node_info = (struct eth1394_node_info*)ud->device.driver_data;
405
406 spin_lock_irqsave(&node_info->pdg.lock, flags);
407 /* The partial datagram list should be empty, but we'll just
408 * make sure anyway... */
409 list_for_each_safe(lh, n, &node_info->pdg.list) {
410 purge_partial_datagram(lh);
411 }
412 spin_unlock_irqrestore(&node_info->pdg.lock, flags);
413
414 kfree(node_info);
415 ud->device.driver_data = NULL;
416 }
417 return 0;
418 }
419
420 static int eth1394_update(struct unit_directory *ud)
421 {
422 struct eth1394_host_info *hi;
423 struct eth1394_priv *priv;
424 struct eth1394_node_ref *node;
425 struct eth1394_node_info *node_info;
426
427 hi = hpsb_get_hostinfo(&eth1394_highlevel, ud->ne->host);
428 if (!hi)
429 return -ENOENT;
430
431 priv = netdev_priv(hi->dev);
432
433 node = eth1394_find_node(&priv->ip_node_list, ud);
434
435 if (!node) {
436 node = kmalloc(sizeof(*node),
437 in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
438 if (!node)
439 return -ENOMEM;
440
441 node_info = kmalloc(sizeof(*node_info),
442 in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
443 if (!node_info) {
444 kfree(node);
445 return -ENOMEM;
446 }
447
448 spin_lock_init(&node_info->pdg.lock);
449 INIT_LIST_HEAD(&node_info->pdg.list);
450 node_info->pdg.sz = 0;
451
452 ud->device.driver_data = node_info;
453 node->ud = ud;
454
455 priv = netdev_priv(hi->dev);
456 list_add_tail(&node->list, &priv->ip_node_list);
457 }
458
459 return 0;
460 }
461
462
463 static struct ieee1394_device_id eth1394_id_table[] = {
464 {
465 .match_flags = (IEEE1394_MATCH_SPECIFIER_ID |
466 IEEE1394_MATCH_VERSION),
467 .specifier_id = ETHER1394_GASP_SPECIFIER_ID,
468 .version = ETHER1394_GASP_VERSION,
469 },
470 {}
471 };
472
473 MODULE_DEVICE_TABLE(ieee1394, eth1394_id_table);
474
475 static struct hpsb_protocol_driver eth1394_proto_driver = {
476 .name = "IPv4 over 1394 Driver",
477 .id_table = eth1394_id_table,
478 .update = eth1394_update,
479 .driver = {
480 .name = ETH1394_DRIVER_NAME,
481 .bus = &ieee1394_bus_type,
482 .probe = eth1394_probe,
483 .remove = eth1394_remove,
484 },
485 };
486
487
488 static void ether1394_reset_priv (struct net_device *dev, int set_mtu)
489 {
490 unsigned long flags;
491 int i;
492 struct eth1394_priv *priv = netdev_priv(dev);
493 struct hpsb_host *host = priv->host;
494 u64 guid = *((u64*)&(host->csr.rom->bus_info_data[3]));
495 u16 maxpayload = 1 << (host->csr.max_rec + 1);
496 int max_speed = IEEE1394_SPEED_MAX;
497
498 spin_lock_irqsave (&priv->lock, flags);
499
500 memset(priv->ud_list, 0, sizeof(struct node_entry*) * ALL_NODES);
501 priv->bc_maxpayload = 512;
502
503 /* Determine speed limit */
504 for (i = 0; i < host->node_count; i++)
505 if (max_speed > host->speed_map[NODEID_TO_NODE(host->node_id) *
506 64 + i])
507 max_speed = host->speed_map[NODEID_TO_NODE(host->node_id) *
508 64 + i];
509 priv->bc_sspd = max_speed;
510
511 /* We'll use our maxpayload as the default mtu */
512 if (set_mtu) {
513 dev->mtu = min(ETH1394_DATA_LEN,
514 (int)(maxpayload -
515 (sizeof(union eth1394_hdr) +
516 ETHER1394_GASP_OVERHEAD)));
517
518 /* Set our hardware address while we're at it */
519 *(u64*)dev->dev_addr = guid;
520 *(u64*)dev->broadcast = ~0x0ULL;
521 }
522
523 spin_unlock_irqrestore (&priv->lock, flags);
524 }
525
526 /* This function is called right before register_netdev */
527 static void ether1394_init_dev (struct net_device *dev)
528 {
529 /* Our functions */
530 dev->open = ether1394_open;
531 dev->stop = ether1394_stop;
532 dev->hard_start_xmit = ether1394_tx;
533 dev->get_stats = ether1394_stats;
534 dev->tx_timeout = ether1394_tx_timeout;
535 dev->change_mtu = ether1394_change_mtu;
536
537 dev->hard_header = ether1394_header;
538 dev->rebuild_header = ether1394_rebuild_header;
539 dev->hard_header_cache = ether1394_header_cache;
540 dev->header_cache_update= ether1394_header_cache_update;
541 dev->hard_header_parse = ether1394_header_parse;
542 dev->set_mac_address = ether1394_mac_addr;
543 SET_ETHTOOL_OPS(dev, &ethtool_ops);
544
545 /* Some constants */
546 dev->watchdog_timeo = ETHER1394_TIMEOUT;
547 dev->flags = IFF_BROADCAST | IFF_MULTICAST;
548 dev->features = NETIF_F_HIGHDMA;
549 dev->addr_len = ETH1394_ALEN;
550 dev->hard_header_len = ETH1394_HLEN;
551 dev->type = ARPHRD_IEEE1394;
552
553 ether1394_reset_priv (dev, 1);
554 }
555
556 /*
557 * This function is called every time a card is found. It is generally called
558 * when the module is installed. This is where we add all of our ethernet
559 * devices. One for each host.
560 */
561 static void ether1394_add_host (struct hpsb_host *host)
562 {
563 struct eth1394_host_info *hi = NULL;
564 struct net_device *dev = NULL;
565 struct eth1394_priv *priv;
566 u64 fifo_addr;
567
568 if (!(host->config_roms & HPSB_CONFIG_ROM_ENTRY_IP1394))
569 return;
570
571 fifo_addr = hpsb_allocate_and_register_addrspace(&eth1394_highlevel,
572 host,
573 &addr_ops,
574 ETHER1394_REGION_ADDR_LEN,
575 ETHER1394_REGION_ADDR_LEN,
576 -1, -1);
577 if (fifo_addr == ~0ULL)
578 goto out;
579
580 /* We should really have our own alloc_hpsbdev() function in
581 * net_init.c instead of calling the one for ethernet then hijacking
582 * it for ourselves. That way we'd be a real networking device. */
583 dev = alloc_etherdev(sizeof (struct eth1394_priv));
584
585 if (dev == NULL) {
586 ETH1394_PRINT_G (KERN_ERR, "Out of memory trying to allocate "
587 "etherdevice for IEEE 1394 device %s-%d\n",
588 host->driver->name, host->id);
589 goto out;
590 }
591
592 SET_MODULE_OWNER(dev);
593 SET_NETDEV_DEV(dev, &host->device);
594
595 priv = netdev_priv(dev);
596
597 INIT_LIST_HEAD(&priv->ip_node_list);
598
599 spin_lock_init(&priv->lock);
600 priv->host = host;
601 priv->local_fifo = fifo_addr;
602
603 hi = hpsb_create_hostinfo(&eth1394_highlevel, host, sizeof(*hi));
604
605 if (hi == NULL) {
606 ETH1394_PRINT_G (KERN_ERR, "Out of memory trying to create "
607 "hostinfo for IEEE 1394 device %s-%d\n",
608 host->driver->name, host->id);
609 goto out;
610 }
611
612 ether1394_init_dev(dev);
613
614 if (register_netdev (dev)) {
615 ETH1394_PRINT (KERN_ERR, dev->name, "Error registering network driver\n");
616 goto out;
617 }
618
619 ETH1394_PRINT (KERN_INFO, dev->name, "IEEE-1394 IPv4 over 1394 Ethernet (fw-host%d)\n",
620 host->id);
621
622 hi->host = host;
623 hi->dev = dev;
624
625 /* Ignore validity in hopes that it will be set in the future. It'll
626 * be checked when the eth device is opened. */
627 priv->broadcast_channel = host->csr.broadcast_channel & 0x3f;
628
629 priv->iso = hpsb_iso_recv_init(host,
630 ETHER1394_ISO_BUF_SIZE,
631 ETHER1394_GASP_BUFFERS,
632 priv->broadcast_channel,
633 HPSB_ISO_DMA_PACKET_PER_BUFFER,
634 1, ether1394_iso);
635 if (priv->iso == NULL) {
636 ETH1394_PRINT(KERN_ERR, dev->name,
637 "Could not allocate isochronous receive context "
638 "for the broadcast channel\n");
639 priv->bc_state = ETHER1394_BC_ERROR;
640 } else {
641 if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0)
642 priv->bc_state = ETHER1394_BC_STOPPED;
643 else
644 priv->bc_state = ETHER1394_BC_RUNNING;
645 }
646
647 return;
648
649 out:
650 if (dev != NULL)
651 free_netdev(dev);
652 if (hi)
653 hpsb_destroy_hostinfo(&eth1394_highlevel, host);
654
655 return;
656 }
657
658 /* Remove a card from our list */
659 static void ether1394_remove_host (struct hpsb_host *host)
660 {
661 struct eth1394_host_info *hi;
662
663 hi = hpsb_get_hostinfo(&eth1394_highlevel, host);
664 if (hi != NULL) {
665 struct eth1394_priv *priv = netdev_priv(hi->dev);
666
667 hpsb_unregister_addrspace(&eth1394_highlevel, host,
668 priv->local_fifo);
669
670 if (priv->iso != NULL)
671 hpsb_iso_shutdown(priv->iso);
672
673 if (hi->dev) {
674 unregister_netdev (hi->dev);
675 free_netdev(hi->dev);
676 }
677 }
678
679 return;
680 }
681
682 /* A reset has just arisen */
683 static void ether1394_host_reset (struct hpsb_host *host)
684 {
685 struct eth1394_host_info *hi;
686 struct eth1394_priv *priv;
687 struct net_device *dev;
688 struct list_head *lh, *n;
689 struct eth1394_node_ref *node;
690 struct eth1394_node_info *node_info;
691 unsigned long flags;
692
693 hi = hpsb_get_hostinfo(&eth1394_highlevel, host);
694
695 /* This can happen for hosts that we don't use */
696 if (hi == NULL)
697 return;
698
699 dev = hi->dev;
700 priv = (struct eth1394_priv *)netdev_priv(dev);
701
702 /* Reset our private host data, but not our mtu */
703 netif_stop_queue (dev);
704 ether1394_reset_priv (dev, 0);
705
706 list_for_each_entry(node, &priv->ip_node_list, list) {
707 node_info = (struct eth1394_node_info*)node->ud->device.driver_data;
708
709 spin_lock_irqsave(&node_info->pdg.lock, flags);
710
711 list_for_each_safe(lh, n, &node_info->pdg.list) {
712 purge_partial_datagram(lh);
713 }
714
715 INIT_LIST_HEAD(&(node_info->pdg.list));
716 node_info->pdg.sz = 0;
717
718 spin_unlock_irqrestore(&node_info->pdg.lock, flags);
719 }
720
721 netif_wake_queue (dev);
722 }
723
724 /******************************************
725 * HW Header net device functions
726 ******************************************/
727 /* These functions have been adapted from net/ethernet/eth.c */
728
729
730 /* Create a fake MAC header for an arbitrary protocol layer.
731 * saddr=NULL means use device source address
732 * daddr=NULL means leave destination address (eg unresolved arp). */
733 static int ether1394_header(struct sk_buff *skb, struct net_device *dev,
734 unsigned short type, void *daddr, void *saddr,
735 unsigned len)
736 {
737 struct eth1394hdr *eth = (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN);
738
739 eth->h_proto = htons(type);
740
741 if (dev->flags & (IFF_LOOPBACK|IFF_NOARP)) {
742 memset(eth->h_dest, 0, dev->addr_len);
743 return(dev->hard_header_len);
744 }
745
746 if (daddr) {
747 memcpy(eth->h_dest,daddr,dev->addr_len);
748 return dev->hard_header_len;
749 }
750
751 return -dev->hard_header_len;
752
753 }
754
755
756 /* Rebuild the faked MAC header. This is called after an ARP
757 * (or in future other address resolution) has completed on this
758 * sk_buff. We now let ARP fill in the other fields.
759 *
760 * This routine CANNOT use cached dst->neigh!
761 * Really, it is used only when dst->neigh is wrong.
762 */
763 static int ether1394_rebuild_header(struct sk_buff *skb)
764 {
765 struct eth1394hdr *eth = (struct eth1394hdr *)skb->data;
766 struct net_device *dev = skb->dev;
767
768 switch (eth->h_proto) {
769
770 #ifdef CONFIG_INET
771 case __constant_htons(ETH_P_IP):
772 return arp_find((unsigned char*)&eth->h_dest, skb);
773 #endif
774 default:
775 ETH1394_PRINT(KERN_DEBUG, dev->name,
776 "unable to resolve type %04x addresses.\n",
777 eth->h_proto);
778 break;
779 }
780
781 return 0;
782 }
783
784 static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr)
785 {
786 struct net_device *dev = skb->dev;
787 memcpy(haddr, dev->dev_addr, ETH1394_ALEN);
788 return ETH1394_ALEN;
789 }
790
791
792 static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh)
793 {
794 unsigned short type = hh->hh_type;
795 struct eth1394hdr *eth = (struct eth1394hdr*)(((u8*)hh->hh_data) +
796 (16 - ETH1394_HLEN));
797 struct net_device *dev = neigh->dev;
798
799 if (type == __constant_htons(ETH_P_802_3)) {
800 return -1;
801 }
802
803 eth->h_proto = type;
804 memcpy(eth->h_dest, neigh->ha, dev->addr_len);
805
806 hh->hh_len = ETH1394_HLEN;
807 return 0;
808 }
809
810 /* Called by Address Resolution module to notify changes in address. */
811 static void ether1394_header_cache_update(struct hh_cache *hh,
812 struct net_device *dev,
813 unsigned char * haddr)
814 {
815 memcpy(((u8*)hh->hh_data) + (16 - ETH1394_HLEN), haddr, dev->addr_len);
816 }
817
818 static int ether1394_mac_addr(struct net_device *dev, void *p)
819 {
820 if (netif_running(dev))
821 return -EBUSY;
822
823 /* Not going to allow setting the MAC address, we really need to use
824 * the real one supplied by the hardware */
825 return -EINVAL;
826 }
827
828
829
830 /******************************************
831 * Datagram reception code
832 ******************************************/
833
834 /* Copied from net/ethernet/eth.c */
835 static inline u16 ether1394_type_trans(struct sk_buff *skb,
836 struct net_device *dev)
837 {
838 struct eth1394hdr *eth;
839 unsigned char *rawp;
840
841 skb->mac.raw = skb->data;
842 skb_pull (skb, ETH1394_HLEN);
843 eth = eth1394_hdr(skb);
844
845 if (*eth->h_dest & 1) {
846 if (memcmp(eth->h_dest, dev->broadcast, dev->addr_len)==0)
847 skb->pkt_type = PACKET_BROADCAST;
848 #if 0
849 else
850 skb->pkt_type = PACKET_MULTICAST;
851 #endif
852 } else {
853 if (memcmp(eth->h_dest, dev->dev_addr, dev->addr_len))
854 skb->pkt_type = PACKET_OTHERHOST;
855 }
856
857 if (ntohs (eth->h_proto) >= 1536)
858 return eth->h_proto;
859
860 rawp = skb->data;
861
862 if (*(unsigned short *)rawp == 0xFFFF)
863 return htons (ETH_P_802_3);
864
865 return htons (ETH_P_802_2);
866 }
867
868 /* Parse an encapsulated IP1394 header into an ethernet frame packet.
869 * We also perform ARP translation here, if need be. */
870 static inline u16 ether1394_parse_encap(struct sk_buff *skb,
871 struct net_device *dev,
872 nodeid_t srcid, nodeid_t destid,
873 u16 ether_type)
874 {
875 struct eth1394_priv *priv = netdev_priv(dev);
876 u64 dest_hw;
877 unsigned short ret = 0;
878
879 /* Setup our hw addresses. We use these to build the
880 * ethernet header. */
881 if (destid == (LOCAL_BUS | ALL_NODES))
882 dest_hw = ~0ULL; /* broadcast */
883 else
884 dest_hw = cpu_to_be64((((u64)priv->host->csr.guid_hi) << 32) |
885 priv->host->csr.guid_lo);
886
887 /* If this is an ARP packet, convert it. First, we want to make
888 * use of some of the fields, since they tell us a little bit
889 * about the sending machine. */
890 if (ether_type == __constant_htons (ETH_P_ARP)) {
891 struct eth1394_arp *arp1394 = (struct eth1394_arp*)skb->data;
892 struct arphdr *arp = (struct arphdr *)skb->data;
893 unsigned char *arp_ptr = (unsigned char *)(arp + 1);
894 u64 fifo_addr = (u64)ntohs(arp1394->fifo_hi) << 32 |
895 ntohl(arp1394->fifo_lo);
896 u8 max_rec = min(priv->host->csr.max_rec,
897 (u8)(arp1394->max_rec));
898 int sspd = arp1394->sspd;
899 u16 maxpayload;
900 struct eth1394_node_ref *node;
901 struct eth1394_node_info *node_info;
902
903 /* Sanity check. MacOSX seems to be sending us 131 in this
904 * field (atleast on my Panther G5). Not sure why. */
905 if (sspd > 5 || sspd < 0)
906 sspd = 0;
907
908 maxpayload = min(eth1394_speedto_maxpayload[sspd], (u16)(1 << (max_rec + 1)));
909
910 node = eth1394_find_node_guid(&priv->ip_node_list,
911 be64_to_cpu(arp1394->s_uniq_id));
912 if (!node) {
913 return 0;
914 }
915
916 node_info = (struct eth1394_node_info*)node->ud->device.driver_data;
917
918 /* Update our speed/payload/fifo_offset table */
919 node_info->maxpayload = maxpayload;
920 node_info->sspd = sspd;
921 node_info->fifo = fifo_addr;
922
923 /* Now that we're done with the 1394 specific stuff, we'll
924 * need to alter some of the data. Believe it or not, all
925 * that needs to be done is sender_IP_address needs to be
926 * moved, the destination hardware address get stuffed
927 * in and the hardware address length set to 8.
928 *
929 * IMPORTANT: The code below overwrites 1394 specific data
930 * needed above so keep the munging of the data for the
931 * higher level IP stack last. */
932
933 arp->ar_hln = 8;
934 arp_ptr += arp->ar_hln; /* skip over sender unique id */
935 *(u32*)arp_ptr = arp1394->sip; /* move sender IP addr */
936 arp_ptr += arp->ar_pln; /* skip over sender IP addr */
937
938 if (arp->ar_op == 1)
939 /* just set ARP req target unique ID to 0 */
940 *((u64*)arp_ptr) = 0;
941 else
942 *((u64*)arp_ptr) = *((u64*)dev->dev_addr);
943 }
944
945 /* Now add the ethernet header. */
946 if (dev->hard_header (skb, dev, __constant_ntohs (ether_type),
947 &dest_hw, NULL, skb->len) >= 0)
948 ret = ether1394_type_trans(skb, dev);
949
950 return ret;
951 }
952
953 static inline int fragment_overlap(struct list_head *frag_list, int offset, int len)
954 {
955 struct fragment_info *fi;
956
957 list_for_each_entry(fi, frag_list, list) {
958 if ( ! ((offset > (fi->offset + fi->len - 1)) ||
959 ((offset + len - 1) < fi->offset)))
960 return 1;
961 }
962 return 0;
963 }
964
965 static inline struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl)
966 {
967 struct partial_datagram *pd;
968
969 list_for_each_entry(pd, pdgl, list) {
970 if (pd->dgl == dgl)
971 return &pd->list;
972 }
973 return NULL;
974 }
975
976 /* Assumes that new fragment does not overlap any existing fragments */
977 static inline int new_fragment(struct list_head *frag_info, int offset, int len)
978 {
979 struct list_head *lh;
980 struct fragment_info *fi, *fi2, *new;
981
982 list_for_each(lh, frag_info) {
983 fi = list_entry(lh, struct fragment_info, list);
984 if ((fi->offset + fi->len) == offset) {
985 /* The new fragment can be tacked on to the end */
986 fi->len += len;
987 /* Did the new fragment plug a hole? */
988 fi2 = list_entry(lh->next, struct fragment_info, list);
989 if ((fi->offset + fi->len) == fi2->offset) {
990 /* glue fragments together */
991 fi->len += fi2->len;
992 list_del(lh->next);
993 kfree(fi2);
994 }
995 return 0;
996 } else if ((offset + len) == fi->offset) {
997 /* The new fragment can be tacked on to the beginning */
998 fi->offset = offset;
999 fi->len += len;
1000 /* Did the new fragment plug a hole? */
1001 fi2 = list_entry(lh->prev, struct fragment_info, list);
1002 if ((fi2->offset + fi2->len) == fi->offset) {
1003 /* glue fragments together */
1004 fi2->len += fi->len;
1005 list_del(lh);
1006 kfree(fi);
1007 }
1008 return 0;
1009 } else if (offset > (fi->offset + fi->len)) {
1010 break;
1011 } else if ((offset + len) < fi->offset) {
1012 lh = lh->prev;
1013 break;
1014 }
1015 }
1016
1017 new = kmalloc(sizeof(*new), GFP_ATOMIC);
1018 if (!new)
1019 return -ENOMEM;
1020
1021 new->offset = offset;
1022 new->len = len;
1023
1024 list_add(&new->list, lh);
1025
1026 return 0;
1027 }
1028
1029 static inline int new_partial_datagram(struct net_device *dev,
1030 struct list_head *pdgl, int dgl,
1031 int dg_size, char *frag_buf,
1032 int frag_off, int frag_len)
1033 {
1034 struct partial_datagram *new;
1035
1036 new = kmalloc(sizeof(*new), GFP_ATOMIC);
1037 if (!new)
1038 return -ENOMEM;
1039
1040 INIT_LIST_HEAD(&new->frag_info);
1041
1042 if (new_fragment(&new->frag_info, frag_off, frag_len) < 0) {
1043 kfree(new);
1044 return -ENOMEM;
1045 }
1046
1047 new->dgl = dgl;
1048 new->dg_size = dg_size;
1049
1050 new->skb = dev_alloc_skb(dg_size + dev->hard_header_len + 15);
1051 if (!new->skb) {
1052 struct fragment_info *fi = list_entry(new->frag_info.next,
1053 struct fragment_info,
1054 list);
1055 kfree(fi);
1056 kfree(new);
1057 return -ENOMEM;
1058 }
1059
1060 skb_reserve(new->skb, (dev->hard_header_len + 15) & ~15);
1061 new->pbuf = skb_put(new->skb, dg_size);
1062 memcpy(new->pbuf + frag_off, frag_buf, frag_len);
1063
1064 list_add(&new->list, pdgl);
1065
1066 return 0;
1067 }
1068
1069 static inline int update_partial_datagram(struct list_head *pdgl, struct list_head *lh,
1070 char *frag_buf, int frag_off, int frag_len)
1071 {
1072 struct partial_datagram *pd = list_entry(lh, struct partial_datagram, list);
1073
1074 if (new_fragment(&pd->frag_info, frag_off, frag_len) < 0) {
1075 return -ENOMEM;
1076 }
1077
1078 memcpy(pd->pbuf + frag_off, frag_buf, frag_len);
1079
1080 /* Move list entry to beginnig of list so that oldest partial
1081 * datagrams percolate to the end of the list */
1082 list_del(lh);
1083 list_add(lh, pdgl);
1084
1085 return 0;
1086 }
1087
1088 static inline int is_datagram_complete(struct list_head *lh, int dg_size)
1089 {
1090 struct partial_datagram *pd = list_entry(lh, struct partial_datagram, list);
1091 struct fragment_info *fi = list_entry(pd->frag_info.next,
1092 struct fragment_info, list);
1093
1094 return (fi->len == dg_size);
1095 }
1096
1097 /* Packet reception. We convert the IP1394 encapsulation header to an
1098 * ethernet header, and fill it with some of our other fields. This is
1099 * an incoming packet from the 1394 bus. */
1100 static int ether1394_data_handler(struct net_device *dev, int srcid, int destid,
1101 char *buf, int len)
1102 {
1103 struct sk_buff *skb;
1104 unsigned long flags;
1105 struct eth1394_priv *priv = netdev_priv(dev);
1106 union eth1394_hdr *hdr = (union eth1394_hdr *)buf;
1107 u16 ether_type = 0; /* initialized to clear warning */
1108 int hdr_len;
1109 struct unit_directory *ud = priv->ud_list[NODEID_TO_NODE(srcid)];
1110 struct eth1394_node_info *node_info;
1111
1112 if (!ud) {
1113 struct eth1394_node_ref *node;
1114 node = eth1394_find_node_nodeid(&priv->ip_node_list, srcid);
1115 if (!node) {
1116 HPSB_PRINT(KERN_ERR, "ether1394 rx: sender nodeid "
1117 "lookup failure: " NODE_BUS_FMT,
1118 NODE_BUS_ARGS(priv->host, srcid));
1119 priv->stats.rx_dropped++;
1120 return -1;
1121 }
1122 ud = node->ud;
1123
1124 priv->ud_list[NODEID_TO_NODE(srcid)] = ud;
1125 }
1126
1127 node_info = (struct eth1394_node_info*)ud->device.driver_data;
1128
1129 /* First, did we receive a fragmented or unfragmented datagram? */
1130 hdr->words.word1 = ntohs(hdr->words.word1);
1131
1132 hdr_len = hdr_type_len[hdr->common.lf];
1133
1134 if (hdr->common.lf == ETH1394_HDR_LF_UF) {
1135 /* An unfragmented datagram has been received by the ieee1394
1136 * bus. Build an skbuff around it so we can pass it to the
1137 * high level network layer. */
1138
1139 skb = dev_alloc_skb(len + dev->hard_header_len + 15);
1140 if (!skb) {
1141 HPSB_PRINT (KERN_ERR, "ether1394 rx: low on mem\n");
1142 priv->stats.rx_dropped++;
1143 return -1;
1144 }
1145 skb_reserve(skb, (dev->hard_header_len + 15) & ~15);
1146 memcpy(skb_put(skb, len - hdr_len), buf + hdr_len, len - hdr_len);
1147 ether_type = hdr->uf.ether_type;
1148 } else {
1149 /* A datagram fragment has been received, now the fun begins. */
1150
1151 struct list_head *pdgl, *lh;
1152 struct partial_datagram *pd;
1153 int fg_off;
1154 int fg_len = len - hdr_len;
1155 int dg_size;
1156 int dgl;
1157 int retval;
1158 struct pdg_list *pdg = &(node_info->pdg);
1159
1160 hdr->words.word3 = ntohs(hdr->words.word3);
1161 /* The 4th header word is reserved so no need to do ntohs() */
1162
1163 if (hdr->common.lf == ETH1394_HDR_LF_FF) {
1164 ether_type = hdr->ff.ether_type;
1165 dgl = hdr->ff.dgl;
1166 dg_size = hdr->ff.dg_size + 1;
1167 fg_off = 0;
1168 } else {
1169 hdr->words.word2 = ntohs(hdr->words.word2);
1170 dgl = hdr->sf.dgl;
1171 dg_size = hdr->sf.dg_size + 1;
1172 fg_off = hdr->sf.fg_off;
1173 }
1174 spin_lock_irqsave(&pdg->lock, flags);
1175
1176 pdgl = &(pdg->list);
1177 lh = find_partial_datagram(pdgl, dgl);
1178
1179 if (lh == NULL) {
1180 while (pdg->sz >= max_partial_datagrams) {
1181 /* remove the oldest */
1182 purge_partial_datagram(pdgl->prev);
1183 pdg->sz--;
1184 }
1185
1186 retval = new_partial_datagram(dev, pdgl, dgl, dg_size,
1187 buf + hdr_len, fg_off,
1188 fg_len);
1189 if (retval < 0) {
1190 spin_unlock_irqrestore(&pdg->lock, flags);
1191 goto bad_proto;
1192 }
1193 pdg->sz++;
1194 lh = find_partial_datagram(pdgl, dgl);
1195 } else {
1196 struct partial_datagram *pd;
1197
1198 pd = list_entry(lh, struct partial_datagram, list);
1199
1200 if (fragment_overlap(&pd->frag_info, fg_off, fg_len)) {
1201 /* Overlapping fragments, obliterate old
1202 * datagram and start new one. */
1203 purge_partial_datagram(lh);
1204 retval = new_partial_datagram(dev, pdgl, dgl,
1205 dg_size,
1206 buf + hdr_len,
1207 fg_off, fg_len);
1208 if (retval < 0) {
1209 pdg->sz--;
1210 spin_unlock_irqrestore(&pdg->lock, flags);
1211 goto bad_proto;
1212 }
1213 } else {
1214 retval = update_partial_datagram(pdgl, lh,
1215 buf + hdr_len,
1216 fg_off, fg_len);
1217 if (retval < 0) {
1218 /* Couldn't save off fragment anyway
1219 * so might as well obliterate the
1220 * datagram now. */
1221 purge_partial_datagram(lh);
1222 pdg->sz--;
1223 spin_unlock_irqrestore(&pdg->lock, flags);
1224 goto bad_proto;
1225 }
1226 } /* fragment overlap */
1227 } /* new datagram or add to existing one */
1228
1229 pd = list_entry(lh, struct partial_datagram, list);
1230
1231 if (hdr->common.lf == ETH1394_HDR_LF_FF) {
1232 pd->ether_type = ether_type;
1233 }
1234
1235 if (is_datagram_complete(lh, dg_size)) {
1236 ether_type = pd->ether_type;
1237 pdg->sz--;
1238 skb = skb_get(pd->skb);
1239 purge_partial_datagram(lh);
1240 spin_unlock_irqrestore(&pdg->lock, flags);
1241 } else {
1242 /* Datagram is not complete, we're done for the
1243 * moment. */
1244 spin_unlock_irqrestore(&pdg->lock, flags);
1245 return 0;
1246 }
1247 } /* unframgented datagram or fragmented one */
1248
1249 /* Write metadata, and then pass to the receive level */
1250 skb->dev = dev;
1251 skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */
1252
1253 /* Parse the encapsulation header. This actually does the job of
1254 * converting to an ethernet frame header, aswell as arp
1255 * conversion if needed. ARP conversion is easier in this
1256 * direction, since we are using ethernet as our backend. */
1257 skb->protocol = ether1394_parse_encap(skb, dev, srcid, destid,
1258 ether_type);
1259
1260
1261 spin_lock_irqsave(&priv->lock, flags);
1262 if (!skb->protocol) {
1263 priv->stats.rx_errors++;
1264 priv->stats.rx_dropped++;
1265 dev_kfree_skb_any(skb);
1266 goto bad_proto;
1267 }
1268
1269 if (netif_rx(skb) == NET_RX_DROP) {
1270 priv->stats.rx_errors++;
1271 priv->stats.rx_dropped++;
1272 goto bad_proto;
1273 }
1274
1275 /* Statistics */
1276 priv->stats.rx_packets++;
1277 priv->stats.rx_bytes += skb->len;
1278
1279 bad_proto:
1280 if (netif_queue_stopped(dev))
1281 netif_wake_queue(dev);
1282 spin_unlock_irqrestore(&priv->lock, flags);
1283
1284 dev->last_rx = jiffies;
1285
1286 return 0;
1287 }
1288
1289 static int ether1394_write(struct hpsb_host *host, int srcid, int destid,
1290 quadlet_t *data, u64 addr, size_t len, u16 flags)
1291 {
1292 struct eth1394_host_info *hi;
1293
1294 hi = hpsb_get_hostinfo(&eth1394_highlevel, host);
1295 if (hi == NULL) {
1296 ETH1394_PRINT_G(KERN_ERR, "Could not find net device for host %s\n",
1297 host->driver->name);
1298 return RCODE_ADDRESS_ERROR;
1299 }
1300
1301 if (ether1394_data_handler(hi->dev, srcid, destid, (char*)data, len))
1302 return RCODE_ADDRESS_ERROR;
1303 else
1304 return RCODE_COMPLETE;
1305 }
1306
1307 static void ether1394_iso(struct hpsb_iso *iso)
1308 {
1309 quadlet_t *data;
1310 char *buf;
1311 struct eth1394_host_info *hi;
1312 struct net_device *dev;
1313 struct eth1394_priv *priv;
1314 unsigned int len;
1315 u32 specifier_id;
1316 u16 source_id;
1317 int i;
1318 int nready;
1319
1320 hi = hpsb_get_hostinfo(&eth1394_highlevel, iso->host);
1321 if (hi == NULL) {
1322 ETH1394_PRINT_G(KERN_ERR, "Could not find net device for host %s\n",
1323 iso->host->driver->name);
1324 return;
1325 }
1326
1327 dev = hi->dev;
1328
1329 nready = hpsb_iso_n_ready(iso);
1330 for (i = 0; i < nready; i++) {
1331 struct hpsb_iso_packet_info *info =
1332 &iso->infos[(iso->first_packet + i) % iso->buf_packets];
1333 data = (quadlet_t*) (iso->data_buf.kvirt + info->offset);
1334
1335 /* skip over GASP header */
1336 buf = (char *)data + 8;
1337 len = info->len - 8;
1338
1339 specifier_id = (((be32_to_cpu(data[0]) & 0xffff) << 8) |
1340 ((be32_to_cpu(data[1]) & 0xff000000) >> 24));
1341 source_id = be32_to_cpu(data[0]) >> 16;
1342
1343 priv = netdev_priv(dev);
1344
1345 if (info->channel != (iso->host->csr.broadcast_channel & 0x3f) ||
1346 specifier_id != ETHER1394_GASP_SPECIFIER_ID) {
1347 /* This packet is not for us */
1348 continue;
1349 }
1350 ether1394_data_handler(dev, source_id, LOCAL_BUS | ALL_NODES,
1351 buf, len);
1352 }
1353
1354 hpsb_iso_recv_release_packets(iso, i);
1355
1356 dev->last_rx = jiffies;
1357 }
1358
1359 /******************************************
1360 * Datagram transmission code
1361 ******************************************/
1362
1363 /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire
1364 * arphdr) is the same format as the ip1394 header, so they overlap. The rest
1365 * needs to be munged a bit. The remainder of the arphdr is formatted based
1366 * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to
1367 * judge.
1368 *
1369 * Now that the EUI is used for the hardware address all we need to do to make
1370 * this work for 1394 is to insert 2 quadlets that contain max_rec size,
1371 * speed, and unicast FIFO address information between the sender_unique_id
1372 * and the IP addresses.
1373 */
1374 static inline void ether1394_arp_to_1394arp(struct sk_buff *skb,
1375 struct net_device *dev)
1376 {
1377 struct eth1394_priv *priv = netdev_priv(dev);
1378
1379 struct arphdr *arp = (struct arphdr *)skb->data;
1380 unsigned char *arp_ptr = (unsigned char *)(arp + 1);
1381 struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data;
1382
1383 /* Believe it or not, all that need to happen is sender IP get moved
1384 * and set hw_addr_len, max_rec, sspd, fifo_hi and fifo_lo. */
1385 arp1394->hw_addr_len = 16;
1386 arp1394->sip = *(u32*)(arp_ptr + ETH1394_ALEN);
1387 arp1394->max_rec = priv->host->csr.max_rec;
1388 arp1394->sspd = priv->host->csr.lnk_spd;
1389 arp1394->fifo_hi = htons (priv->local_fifo >> 32);
1390 arp1394->fifo_lo = htonl (priv->local_fifo & ~0x0);
1391
1392 return;
1393 }
1394
1395 /* We need to encapsulate the standard header with our own. We use the
1396 * ethernet header's proto for our own. */
1397 static inline unsigned int ether1394_encapsulate_prep(unsigned int max_payload,
1398 int proto,
1399 union eth1394_hdr *hdr,
1400 u16 dg_size, u16 dgl)
1401 {
1402 unsigned int adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_UF];
1403
1404 /* Does it all fit in one packet? */
1405 if (dg_size <= adj_max_payload) {
1406 hdr->uf.lf = ETH1394_HDR_LF_UF;
1407 hdr->uf.ether_type = proto;
1408 } else {
1409 hdr->ff.lf = ETH1394_HDR_LF_FF;
1410 hdr->ff.ether_type = proto;
1411 hdr->ff.dg_size = dg_size - 1;
1412 hdr->ff.dgl = dgl;
1413 adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_FF];
1414 }
1415 return((dg_size + (adj_max_payload - 1)) / adj_max_payload);
1416 }
1417
1418 static inline unsigned int ether1394_encapsulate(struct sk_buff *skb,
1419 unsigned int max_payload,
1420 union eth1394_hdr *hdr)
1421 {
1422 union eth1394_hdr *bufhdr;
1423 int ftype = hdr->common.lf;
1424 int hdrsz = hdr_type_len[ftype];
1425 unsigned int adj_max_payload = max_payload - hdrsz;
1426
1427 switch(ftype) {
1428 case ETH1394_HDR_LF_UF:
1429 bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz);
1430 bufhdr->words.word1 = htons(hdr->words.word1);
1431 bufhdr->words.word2 = hdr->words.word2;
1432 break;
1433
1434 case ETH1394_HDR_LF_FF:
1435 bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz);
1436 bufhdr->words.word1 = htons(hdr->words.word1);
1437 bufhdr->words.word2 = hdr->words.word2;
1438 bufhdr->words.word3 = htons(hdr->words.word3);
1439 bufhdr->words.word4 = 0;
1440
1441 /* Set frag type here for future interior fragments */
1442 hdr->common.lf = ETH1394_HDR_LF_IF;
1443 hdr->sf.fg_off = 0;
1444 break;
1445
1446 default:
1447 hdr->sf.fg_off += adj_max_payload;
1448 bufhdr = (union eth1394_hdr *)skb_pull(skb, adj_max_payload);
1449 if (max_payload >= skb->len)
1450 hdr->common.lf = ETH1394_HDR_LF_LF;
1451 bufhdr->words.word1 = htons(hdr->words.word1);
1452 bufhdr->words.word2 = htons(hdr->words.word2);
1453 bufhdr->words.word3 = htons(hdr->words.word3);
1454 bufhdr->words.word4 = 0;
1455 }
1456
1457 return min(max_payload, skb->len);
1458 }
1459
1460 static inline struct hpsb_packet *ether1394_alloc_common_packet(struct hpsb_host *host)
1461 {
1462 struct hpsb_packet *p;
1463
1464 p = hpsb_alloc_packet(0);
1465 if (p) {
1466 p->host = host;
1467 p->generation = get_hpsb_generation(host);
1468 p->type = hpsb_async;
1469 }
1470 return p;
1471 }
1472
1473 static inline int ether1394_prep_write_packet(struct hpsb_packet *p,
1474 struct hpsb_host *host,
1475 nodeid_t node, u64 addr,
1476 void * data, int tx_len)
1477 {
1478 p->node_id = node;
1479 p->data = NULL;
1480
1481 p->tcode = TCODE_WRITEB;
1482 p->header[1] = (host->node_id << 16) | (addr >> 32);
1483 p->header[2] = addr & 0xffffffff;
1484
1485 p->header_size = 16;
1486 p->expect_response = 1;
1487
1488 if (hpsb_get_tlabel(p)) {
1489 ETH1394_PRINT_G(KERN_ERR, "No more tlabels left while sending "
1490 "to node " NODE_BUS_FMT "\n", NODE_BUS_ARGS(host, node));
1491 return -1;
1492 }
1493 p->header[0] = (p->node_id << 16) | (p->tlabel << 10)
1494 | (1 << 8) | (TCODE_WRITEB << 4);
1495
1496 p->header[3] = tx_len << 16;
1497 p->data_size = (tx_len + 3) & ~3;
1498 p->data = (quadlet_t*)data;
1499
1500 return 0;
1501 }
1502
1503 static inline void ether1394_prep_gasp_packet(struct hpsb_packet *p,
1504 struct eth1394_priv *priv,
1505 struct sk_buff *skb, int length)
1506 {
1507 p->header_size = 4;
1508 p->tcode = TCODE_STREAM_DATA;
1509
1510 p->header[0] = (length << 16) | (3 << 14)
1511 | ((priv->broadcast_channel) << 8)
1512 | (TCODE_STREAM_DATA << 4);
1513 p->data_size = length;
1514 p->data = ((quadlet_t*)skb->data) - 2;
1515 p->data[0] = cpu_to_be32((priv->host->node_id << 16) |
1516 ETHER1394_GASP_SPECIFIER_ID_HI);
1517 p->data[1] = __constant_cpu_to_be32((ETHER1394_GASP_SPECIFIER_ID_LO << 24) |
1518 ETHER1394_GASP_VERSION);
1519
1520 /* Setting the node id to ALL_NODES (not LOCAL_BUS | ALL_NODES)
1521 * prevents hpsb_send_packet() from setting the speed to an arbitrary
1522 * value based on packet->node_id if packet->node_id is not set. */
1523 p->node_id = ALL_NODES;
1524 p->speed_code = priv->bc_sspd;
1525 }
1526
1527 static inline void ether1394_free_packet(struct hpsb_packet *packet)
1528 {
1529 if (packet->tcode != TCODE_STREAM_DATA)
1530 hpsb_free_tlabel(packet);
1531 hpsb_free_packet(packet);
1532 }
1533
1534 static void ether1394_complete_cb(void *__ptask);
1535
1536 static int ether1394_send_packet(struct packet_task *ptask, unsigned int tx_len)
1537 {
1538 struct eth1394_priv *priv = ptask->priv;
1539 struct hpsb_packet *packet = NULL;
1540
1541 packet = ether1394_alloc_common_packet(priv->host);
1542 if (!packet)
1543 return -1;
1544
1545 if (ptask->tx_type == ETH1394_GASP) {
1546 int length = tx_len + (2 * sizeof(quadlet_t));
1547
1548 ether1394_prep_gasp_packet(packet, priv, ptask->skb, length);
1549 } else if (ether1394_prep_write_packet(packet, priv->host,
1550 ptask->dest_node,
1551 ptask->addr, ptask->skb->data,
1552 tx_len)) {
1553 hpsb_free_packet(packet);
1554 return -1;
1555 }
1556
1557 ptask->packet = packet;
1558 hpsb_set_packet_complete_task(ptask->packet, ether1394_complete_cb,
1559 ptask);
1560
1561 if (hpsb_send_packet(packet) < 0) {
1562 ether1394_free_packet(packet);
1563 return -1;
1564 }
1565
1566 return 0;
1567 }
1568
1569
1570 /* Task function to be run when a datagram transmission is completed */
1571 static inline void ether1394_dg_complete(struct packet_task *ptask, int fail)
1572 {
1573 struct sk_buff *skb = ptask->skb;
1574 struct net_device *dev = skb->dev;
1575 struct eth1394_priv *priv = netdev_priv(dev);
1576 unsigned long flags;
1577
1578 /* Statistics */
1579 spin_lock_irqsave(&priv->lock, flags);
1580 if (fail) {
1581 priv->stats.tx_dropped++;
1582 priv->stats.tx_errors++;
1583 } else {
1584 priv->stats.tx_bytes += skb->len;
1585 priv->stats.tx_packets++;
1586 }
1587 spin_unlock_irqrestore(&priv->lock, flags);
1588
1589 dev_kfree_skb_any(skb);
1590 kmem_cache_free(packet_task_cache, ptask);
1591 }
1592
1593
1594 /* Callback for when a packet has been sent and the status of that packet is
1595 * known */
1596 static void ether1394_complete_cb(void *__ptask)
1597 {
1598 struct packet_task *ptask = (struct packet_task *)__ptask;
1599 struct hpsb_packet *packet = ptask->packet;
1600 int fail = 0;
1601
1602 if (packet->tcode != TCODE_STREAM_DATA)
1603 fail = hpsb_packet_success(packet);
1604
1605 ether1394_free_packet(packet);
1606
1607 ptask->outstanding_pkts--;
1608 if (ptask->outstanding_pkts > 0 && !fail) {
1609 int tx_len;
1610
1611 /* Add the encapsulation header to the fragment */
1612 tx_len = ether1394_encapsulate(ptask->skb, ptask->max_payload,
1613 &ptask->hdr);
1614 if (ether1394_send_packet(ptask, tx_len))
1615 ether1394_dg_complete(ptask, 1);
1616 } else {
1617 ether1394_dg_complete(ptask, fail);
1618 }
1619 }
1620
1621
1622
1623 /* Transmit a packet (called by kernel) */
1624 static int ether1394_tx (struct sk_buff *skb, struct net_device *dev)
1625 {
1626 gfp_t kmflags = in_interrupt() ? GFP_ATOMIC : GFP_KERNEL;
1627 struct eth1394hdr *eth;
1628 struct eth1394_priv *priv = netdev_priv(dev);
1629 int proto;
1630 unsigned long flags;
1631 nodeid_t dest_node;
1632 eth1394_tx_type tx_type;
1633 int ret = 0;
1634 unsigned int tx_len;
1635 unsigned int max_payload;
1636 u16 dg_size;
1637 u16 dgl;
1638 struct packet_task *ptask;
1639 struct eth1394_node_ref *node;
1640 struct eth1394_node_info *node_info = NULL;
1641
1642 ptask = kmem_cache_alloc(packet_task_cache, kmflags);
1643 if (ptask == NULL) {
1644 ret = -ENOMEM;
1645 goto fail;
1646 }
1647
1648 /* XXX Ignore this for now. Noticed that when MacOSX is the IRM,
1649 * it does not set our validity bit. We need to compensate for
1650 * that somewhere else, but not in eth1394. */
1651 #if 0
1652 if ((priv->host->csr.broadcast_channel & 0xc0000000) != 0xc0000000) {
1653 ret = -EAGAIN;
1654 goto fail;
1655 }
1656 #endif
1657
1658 if ((skb = skb_share_check (skb, kmflags)) == NULL) {
1659 ret = -ENOMEM;
1660 goto fail;
1661 }
1662
1663 /* Get rid of the fake eth1394 header, but save a pointer */
1664 eth = (struct eth1394hdr*)skb->data;
1665 skb_pull(skb, ETH1394_HLEN);
1666
1667 proto = eth->h_proto;
1668 dg_size = skb->len;
1669
1670 /* Set the transmission type for the packet. ARP packets and IP
1671 * broadcast packets are sent via GASP. */
1672 if (memcmp(eth->h_dest, dev->broadcast, ETH1394_ALEN) == 0 ||
1673 proto == __constant_htons(ETH_P_ARP) ||
1674 (proto == __constant_htons(ETH_P_IP) &&
1675 IN_MULTICAST(__constant_ntohl(skb->nh.iph->daddr)))) {
1676 tx_type = ETH1394_GASP;
1677 dest_node = LOCAL_BUS | ALL_NODES;
1678 max_payload = priv->bc_maxpayload - ETHER1394_GASP_OVERHEAD;
1679 BUG_ON(max_payload < (512 - ETHER1394_GASP_OVERHEAD));
1680 dgl = priv->bc_dgl;
1681 if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF])
1682 priv->bc_dgl++;
1683 } else {
1684 node = eth1394_find_node_guid(&priv->ip_node_list,
1685 be64_to_cpu(*(u64*)eth->h_dest));
1686 if (!node) {
1687 ret = -EAGAIN;
1688 goto fail;
1689 }
1690 node_info = (struct eth1394_node_info*)node->ud->device.driver_data;
1691 if (node_info->fifo == ETHER1394_INVALID_ADDR) {
1692 ret = -EAGAIN;
1693 goto fail;
1694 }
1695
1696 dest_node = node->ud->ne->nodeid;
1697 max_payload = node_info->maxpayload;
1698 BUG_ON(max_payload < (512 - ETHER1394_GASP_OVERHEAD));
1699
1700 dgl = node_info->dgl;
1701 if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF])
1702 node_info->dgl++;
1703 tx_type = ETH1394_WRREQ;
1704 }
1705
1706 /* If this is an ARP packet, convert it */
1707 if (proto == __constant_htons (ETH_P_ARP))
1708 ether1394_arp_to_1394arp (skb, dev);
1709
1710 ptask->hdr.words.word1 = 0;
1711 ptask->hdr.words.word2 = 0;
1712 ptask->hdr.words.word3 = 0;
1713 ptask->hdr.words.word4 = 0;
1714 ptask->skb = skb;
1715 ptask->priv = priv;
1716 ptask->tx_type = tx_type;
1717
1718 if (tx_type != ETH1394_GASP) {
1719 u64 addr;
1720
1721 spin_lock_irqsave(&priv->lock, flags);
1722 addr = node_info->fifo;
1723 spin_unlock_irqrestore(&priv->lock, flags);
1724
1725 ptask->addr = addr;
1726 ptask->dest_node = dest_node;
1727 }
1728
1729 ptask->tx_type = tx_type;
1730 ptask->max_payload = max_payload;
1731 ptask->outstanding_pkts = ether1394_encapsulate_prep(max_payload, proto,
1732 &ptask->hdr, dg_size,
1733 dgl);
1734
1735 /* Add the encapsulation header to the fragment */
1736 tx_len = ether1394_encapsulate(skb, max_payload, &ptask->hdr);
1737 dev->trans_start = jiffies;
1738 if (ether1394_send_packet(ptask, tx_len))
1739 goto fail;
1740
1741 netif_wake_queue(dev);
1742 return 0;
1743 fail:
1744 if (ptask)
1745 kmem_cache_free(packet_task_cache, ptask);
1746
1747 if (skb != NULL)
1748 dev_kfree_skb(skb);
1749
1750 spin_lock_irqsave (&priv->lock, flags);
1751 priv->stats.tx_dropped++;
1752 priv->stats.tx_errors++;
1753 spin_unlock_irqrestore (&priv->lock, flags);
1754
1755 if (netif_queue_stopped(dev))
1756 netif_wake_queue(dev);
1757
1758 return 0; /* returning non-zero causes serious problems */
1759 }
1760
1761 static void ether1394_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1762 {
1763 strcpy (info->driver, driver_name);
1764 /* FIXME XXX provide sane businfo */
1765 strcpy (info->bus_info, "ieee1394");
1766 }
1767
1768 static struct ethtool_ops ethtool_ops = {
1769 .get_drvinfo = ether1394_get_drvinfo
1770 };
1771
1772 static int __init ether1394_init_module (void)
1773 {
1774 packet_task_cache = kmem_cache_create("packet_task", sizeof(struct packet_task),
1775 0, 0, NULL, NULL);
1776
1777 /* Register ourselves as a highlevel driver */
1778 hpsb_register_highlevel(&eth1394_highlevel);
1779
1780 return hpsb_register_protocol(&eth1394_proto_driver);
1781 }
1782
1783 static void __exit ether1394_exit_module (void)
1784 {
1785 hpsb_unregister_protocol(&eth1394_proto_driver);
1786 hpsb_unregister_highlevel(&eth1394_highlevel);
1787 kmem_cache_destroy(packet_task_cache);
1788 }
1789
1790 module_init(ether1394_init_module);
1791 module_exit(ether1394_exit_module);
Linux with added FPC-III support