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1da177e4 LT |
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 | static char version[] __devinitdata = | |
3ae3d0d4 | 92 | "$Rev: 1312 $ Ben Collins <bcollins@debian.org>"; |
1da177e4 LT |
93 | |
94 | struct fragment_info { | |
95 | struct list_head list; | |
96 | int offset; | |
97 | int len; | |
98 | }; | |
99 | ||
100 | struct partial_datagram { | |
101 | struct list_head list; | |
102 | u16 dgl; | |
103 | u16 dg_size; | |
104 | u16 ether_type; | |
105 | struct sk_buff *skb; | |
106 | char *pbuf; | |
107 | struct list_head frag_info; | |
108 | }; | |
109 | ||
110 | struct pdg_list { | |
111 | struct list_head list; /* partial datagram list per node */ | |
112 | unsigned int sz; /* partial datagram list size per node */ | |
113 | spinlock_t lock; /* partial datagram lock */ | |
114 | }; | |
115 | ||
116 | struct eth1394_host_info { | |
117 | struct hpsb_host *host; | |
118 | struct net_device *dev; | |
119 | }; | |
120 | ||
121 | struct eth1394_node_ref { | |
122 | struct unit_directory *ud; | |
123 | struct list_head list; | |
124 | }; | |
125 | ||
126 | struct eth1394_node_info { | |
127 | u16 maxpayload; /* Max payload */ | |
128 | u8 sspd; /* Max speed */ | |
129 | u64 fifo; /* FIFO address */ | |
130 | struct pdg_list pdg; /* partial RX datagram lists */ | |
131 | int dgl; /* Outgoing datagram label */ | |
132 | }; | |
133 | ||
134 | /* Our ieee1394 highlevel driver */ | |
135 | #define ETH1394_DRIVER_NAME "eth1394" | |
136 | static const char driver_name[] = ETH1394_DRIVER_NAME; | |
137 | ||
138 | static kmem_cache_t *packet_task_cache; | |
139 | ||
140 | static struct hpsb_highlevel eth1394_highlevel; | |
141 | ||
142 | /* Use common.lf to determine header len */ | |
143 | static const int hdr_type_len[] = { | |
144 | sizeof (struct eth1394_uf_hdr), | |
145 | sizeof (struct eth1394_ff_hdr), | |
146 | sizeof (struct eth1394_sf_hdr), | |
147 | sizeof (struct eth1394_sf_hdr) | |
148 | }; | |
149 | ||
150 | /* Change this to IEEE1394_SPEED_S100 to make testing easier */ | |
151 | #define ETH1394_SPEED_DEF IEEE1394_SPEED_MAX | |
152 | ||
153 | /* For now, this needs to be 1500, so that XP works with us */ | |
154 | #define ETH1394_DATA_LEN ETH_DATA_LEN | |
155 | ||
156 | static const u16 eth1394_speedto_maxpayload[] = { | |
157 | /* S100, S200, S400, S800, S1600, S3200 */ | |
158 | 512, 1024, 2048, 4096, 4096, 4096 | |
159 | }; | |
160 | ||
161 | MODULE_AUTHOR("Ben Collins (bcollins@debian.org)"); | |
162 | MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)"); | |
163 | MODULE_LICENSE("GPL"); | |
164 | ||
165 | /* The max_partial_datagrams parameter is the maximum number of fragmented | |
166 | * datagrams per node that eth1394 will keep in memory. Providing an upper | |
167 | * bound allows us to limit the amount of memory that partial datagrams | |
168 | * consume in the event that some partial datagrams are never completed. | |
169 | */ | |
170 | static int max_partial_datagrams = 25; | |
171 | module_param(max_partial_datagrams, int, S_IRUGO | S_IWUSR); | |
172 | MODULE_PARM_DESC(max_partial_datagrams, | |
173 | "Maximum number of partially received fragmented datagrams " | |
174 | "(default = 25)."); | |
175 | ||
176 | ||
177 | static int ether1394_header(struct sk_buff *skb, struct net_device *dev, | |
178 | unsigned short type, void *daddr, void *saddr, | |
179 | unsigned len); | |
180 | static int ether1394_rebuild_header(struct sk_buff *skb); | |
181 | static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr); | |
182 | static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh); | |
183 | static void ether1394_header_cache_update(struct hh_cache *hh, | |
184 | struct net_device *dev, | |
185 | unsigned char * haddr); | |
186 | static int ether1394_mac_addr(struct net_device *dev, void *p); | |
187 | ||
188 | static void purge_partial_datagram(struct list_head *old); | |
189 | static int ether1394_tx(struct sk_buff *skb, struct net_device *dev); | |
190 | static void ether1394_iso(struct hpsb_iso *iso); | |
191 | ||
192 | static struct ethtool_ops ethtool_ops; | |
193 | ||
194 | static int ether1394_write(struct hpsb_host *host, int srcid, int destid, | |
195 | quadlet_t *data, u64 addr, size_t len, u16 flags); | |
196 | static void ether1394_add_host (struct hpsb_host *host); | |
197 | static void ether1394_remove_host (struct hpsb_host *host); | |
198 | static void ether1394_host_reset (struct hpsb_host *host); | |
199 | ||
200 | /* Function for incoming 1394 packets */ | |
201 | static struct hpsb_address_ops addr_ops = { | |
202 | .write = ether1394_write, | |
203 | }; | |
204 | ||
205 | /* Ieee1394 highlevel driver functions */ | |
206 | static struct hpsb_highlevel eth1394_highlevel = { | |
207 | .name = driver_name, | |
208 | .add_host = ether1394_add_host, | |
209 | .remove_host = ether1394_remove_host, | |
210 | .host_reset = ether1394_host_reset, | |
211 | }; | |
212 | ||
213 | ||
214 | /* This is called after an "ifup" */ | |
215 | static int ether1394_open (struct net_device *dev) | |
216 | { | |
217 | struct eth1394_priv *priv = netdev_priv(dev); | |
218 | int ret = 0; | |
219 | ||
220 | /* Something bad happened, don't even try */ | |
221 | if (priv->bc_state == ETHER1394_BC_ERROR) { | |
222 | /* we'll try again */ | |
223 | priv->iso = hpsb_iso_recv_init(priv->host, | |
3ae3d0d4 | 224 | ETHER1394_ISO_BUF_SIZE, |
1da177e4 LT |
225 | ETHER1394_GASP_BUFFERS, |
226 | priv->broadcast_channel, | |
227 | HPSB_ISO_DMA_PACKET_PER_BUFFER, | |
228 | 1, ether1394_iso); | |
229 | if (priv->iso == NULL) { | |
230 | ETH1394_PRINT(KERN_ERR, dev->name, | |
231 | "Could not allocate isochronous receive " | |
232 | "context for the broadcast channel\n"); | |
233 | priv->bc_state = ETHER1394_BC_ERROR; | |
234 | ret = -EAGAIN; | |
235 | } else { | |
236 | if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0) | |
237 | priv->bc_state = ETHER1394_BC_STOPPED; | |
238 | else | |
239 | priv->bc_state = ETHER1394_BC_RUNNING; | |
240 | } | |
241 | } | |
242 | ||
243 | if (ret) | |
244 | return ret; | |
245 | ||
246 | netif_start_queue (dev); | |
247 | return 0; | |
248 | } | |
249 | ||
250 | /* This is called after an "ifdown" */ | |
251 | static int ether1394_stop (struct net_device *dev) | |
252 | { | |
253 | netif_stop_queue (dev); | |
254 | return 0; | |
255 | } | |
256 | ||
257 | /* Return statistics to the caller */ | |
258 | static struct net_device_stats *ether1394_stats (struct net_device *dev) | |
259 | { | |
260 | return &(((struct eth1394_priv *)netdev_priv(dev))->stats); | |
261 | } | |
262 | ||
263 | /* What to do if we timeout. I think a host reset is probably in order, so | |
264 | * that's what we do. Should we increment the stat counters too? */ | |
265 | static void ether1394_tx_timeout (struct net_device *dev) | |
266 | { | |
267 | ETH1394_PRINT (KERN_ERR, dev->name, "Timeout, resetting host %s\n", | |
268 | ((struct eth1394_priv *)netdev_priv(dev))->host->driver->name); | |
269 | ||
270 | highlevel_host_reset (((struct eth1394_priv *)netdev_priv(dev))->host); | |
271 | ||
272 | netif_wake_queue (dev); | |
273 | } | |
274 | ||
275 | static int ether1394_change_mtu(struct net_device *dev, int new_mtu) | |
276 | { | |
277 | struct eth1394_priv *priv = netdev_priv(dev); | |
278 | ||
279 | if ((new_mtu < 68) || | |
280 | (new_mtu > min(ETH1394_DATA_LEN, | |
281 | (int)((1 << (priv->host->csr.max_rec + 1)) - | |
282 | (sizeof(union eth1394_hdr) + | |
283 | ETHER1394_GASP_OVERHEAD))))) | |
284 | return -EINVAL; | |
285 | dev->mtu = new_mtu; | |
286 | return 0; | |
287 | } | |
288 | ||
289 | static void purge_partial_datagram(struct list_head *old) | |
290 | { | |
291 | struct partial_datagram *pd = list_entry(old, struct partial_datagram, list); | |
292 | struct list_head *lh, *n; | |
293 | ||
294 | list_for_each_safe(lh, n, &pd->frag_info) { | |
295 | struct fragment_info *fi = list_entry(lh, struct fragment_info, list); | |
296 | list_del(lh); | |
297 | kfree(fi); | |
298 | } | |
299 | list_del(old); | |
300 | kfree_skb(pd->skb); | |
301 | kfree(pd); | |
302 | } | |
303 | ||
304 | /****************************************** | |
305 | * 1394 bus activity functions | |
306 | ******************************************/ | |
307 | ||
308 | static struct eth1394_node_ref *eth1394_find_node(struct list_head *inl, | |
309 | struct unit_directory *ud) | |
310 | { | |
311 | struct eth1394_node_ref *node; | |
312 | ||
313 | list_for_each_entry(node, inl, list) | |
314 | if (node->ud == ud) | |
315 | return node; | |
316 | ||
317 | return NULL; | |
318 | } | |
319 | ||
320 | static struct eth1394_node_ref *eth1394_find_node_guid(struct list_head *inl, | |
321 | u64 guid) | |
322 | { | |
323 | struct eth1394_node_ref *node; | |
324 | ||
325 | list_for_each_entry(node, inl, list) | |
326 | if (node->ud->ne->guid == guid) | |
327 | return node; | |
328 | ||
329 | return NULL; | |
330 | } | |
331 | ||
332 | static struct eth1394_node_ref *eth1394_find_node_nodeid(struct list_head *inl, | |
333 | nodeid_t nodeid) | |
334 | { | |
335 | struct eth1394_node_ref *node; | |
336 | list_for_each_entry(node, inl, list) { | |
337 | if (node->ud->ne->nodeid == nodeid) | |
338 | return node; | |
339 | } | |
340 | ||
341 | return NULL; | |
342 | } | |
343 | ||
344 | static int eth1394_probe(struct device *dev) | |
345 | { | |
346 | struct unit_directory *ud; | |
347 | struct eth1394_host_info *hi; | |
348 | struct eth1394_priv *priv; | |
349 | struct eth1394_node_ref *new_node; | |
350 | struct eth1394_node_info *node_info; | |
351 | ||
352 | ud = container_of(dev, struct unit_directory, device); | |
353 | ||
354 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
355 | if (!hi) | |
356 | return -ENOENT; | |
357 | ||
358 | new_node = kmalloc(sizeof(struct eth1394_node_ref), | |
359 | in_interrupt() ? GFP_ATOMIC : GFP_KERNEL); | |
360 | if (!new_node) | |
361 | return -ENOMEM; | |
362 | ||
363 | node_info = kmalloc(sizeof(struct eth1394_node_info), | |
364 | in_interrupt() ? GFP_ATOMIC : GFP_KERNEL); | |
365 | if (!node_info) { | |
366 | kfree(new_node); | |
367 | return -ENOMEM; | |
368 | } | |
369 | ||
370 | spin_lock_init(&node_info->pdg.lock); | |
371 | INIT_LIST_HEAD(&node_info->pdg.list); | |
372 | node_info->pdg.sz = 0; | |
373 | node_info->fifo = ETHER1394_INVALID_ADDR; | |
374 | ||
375 | ud->device.driver_data = node_info; | |
376 | new_node->ud = ud; | |
377 | ||
378 | priv = netdev_priv(hi->dev); | |
379 | list_add_tail(&new_node->list, &priv->ip_node_list); | |
380 | ||
381 | return 0; | |
382 | } | |
383 | ||
384 | static int eth1394_remove(struct device *dev) | |
385 | { | |
386 | struct unit_directory *ud; | |
387 | struct eth1394_host_info *hi; | |
388 | struct eth1394_priv *priv; | |
389 | struct eth1394_node_ref *old_node; | |
390 | struct eth1394_node_info *node_info; | |
391 | struct list_head *lh, *n; | |
392 | unsigned long flags; | |
393 | ||
394 | ud = container_of(dev, struct unit_directory, device); | |
395 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
396 | if (!hi) | |
397 | return -ENOENT; | |
398 | ||
399 | priv = netdev_priv(hi->dev); | |
400 | ||
401 | old_node = eth1394_find_node(&priv->ip_node_list, ud); | |
402 | ||
403 | if (old_node) { | |
404 | list_del(&old_node->list); | |
405 | kfree(old_node); | |
406 | ||
407 | node_info = (struct eth1394_node_info*)ud->device.driver_data; | |
408 | ||
409 | spin_lock_irqsave(&node_info->pdg.lock, flags); | |
410 | /* The partial datagram list should be empty, but we'll just | |
411 | * make sure anyway... */ | |
412 | list_for_each_safe(lh, n, &node_info->pdg.list) { | |
413 | purge_partial_datagram(lh); | |
414 | } | |
415 | spin_unlock_irqrestore(&node_info->pdg.lock, flags); | |
416 | ||
417 | kfree(node_info); | |
418 | ud->device.driver_data = NULL; | |
419 | } | |
420 | return 0; | |
421 | } | |
422 | ||
423 | static int eth1394_update(struct unit_directory *ud) | |
424 | { | |
425 | struct eth1394_host_info *hi; | |
426 | struct eth1394_priv *priv; | |
427 | struct eth1394_node_ref *node; | |
428 | struct eth1394_node_info *node_info; | |
429 | ||
430 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
431 | if (!hi) | |
432 | return -ENOENT; | |
433 | ||
434 | priv = netdev_priv(hi->dev); | |
435 | ||
436 | node = eth1394_find_node(&priv->ip_node_list, ud); | |
437 | ||
438 | if (!node) { | |
439 | node = kmalloc(sizeof(struct eth1394_node_ref), | |
440 | in_interrupt() ? GFP_ATOMIC : GFP_KERNEL); | |
441 | if (!node) | |
442 | return -ENOMEM; | |
443 | ||
444 | node_info = kmalloc(sizeof(struct eth1394_node_info), | |
445 | in_interrupt() ? GFP_ATOMIC : GFP_KERNEL); | |
446 | if (!node_info) { | |
447 | kfree(node); | |
448 | return -ENOMEM; | |
449 | } | |
450 | ||
451 | spin_lock_init(&node_info->pdg.lock); | |
452 | INIT_LIST_HEAD(&node_info->pdg.list); | |
453 | node_info->pdg.sz = 0; | |
454 | ||
455 | ud->device.driver_data = node_info; | |
456 | node->ud = ud; | |
457 | ||
458 | priv = netdev_priv(hi->dev); | |
459 | list_add_tail(&node->list, &priv->ip_node_list); | |
460 | } | |
461 | ||
462 | return 0; | |
463 | } | |
464 | ||
465 | ||
466 | static struct ieee1394_device_id eth1394_id_table[] = { | |
467 | { | |
468 | .match_flags = (IEEE1394_MATCH_SPECIFIER_ID | | |
469 | IEEE1394_MATCH_VERSION), | |
470 | .specifier_id = ETHER1394_GASP_SPECIFIER_ID, | |
471 | .version = ETHER1394_GASP_VERSION, | |
472 | }, | |
473 | {} | |
474 | }; | |
475 | ||
476 | MODULE_DEVICE_TABLE(ieee1394, eth1394_id_table); | |
477 | ||
478 | static struct hpsb_protocol_driver eth1394_proto_driver = { | |
479 | .name = "IPv4 over 1394 Driver", | |
480 | .id_table = eth1394_id_table, | |
481 | .update = eth1394_update, | |
482 | .driver = { | |
483 | .name = ETH1394_DRIVER_NAME, | |
484 | .bus = &ieee1394_bus_type, | |
485 | .probe = eth1394_probe, | |
486 | .remove = eth1394_remove, | |
487 | }, | |
488 | }; | |
489 | ||
490 | ||
491 | static void ether1394_reset_priv (struct net_device *dev, int set_mtu) | |
492 | { | |
493 | unsigned long flags; | |
494 | int i; | |
495 | struct eth1394_priv *priv = netdev_priv(dev); | |
496 | struct hpsb_host *host = priv->host; | |
497 | u64 guid = *((u64*)&(host->csr.rom->bus_info_data[3])); | |
498 | u16 maxpayload = 1 << (host->csr.max_rec + 1); | |
499 | int max_speed = IEEE1394_SPEED_MAX; | |
500 | ||
501 | spin_lock_irqsave (&priv->lock, flags); | |
502 | ||
503 | memset(priv->ud_list, 0, sizeof(struct node_entry*) * ALL_NODES); | |
504 | priv->bc_maxpayload = 512; | |
505 | ||
506 | /* Determine speed limit */ | |
507 | for (i = 0; i < host->node_count; i++) | |
508 | if (max_speed > host->speed_map[NODEID_TO_NODE(host->node_id) * | |
509 | 64 + i]) | |
510 | max_speed = host->speed_map[NODEID_TO_NODE(host->node_id) * | |
511 | 64 + i]; | |
512 | priv->bc_sspd = max_speed; | |
513 | ||
514 | /* We'll use our maxpayload as the default mtu */ | |
515 | if (set_mtu) { | |
516 | dev->mtu = min(ETH1394_DATA_LEN, | |
517 | (int)(maxpayload - | |
518 | (sizeof(union eth1394_hdr) + | |
519 | ETHER1394_GASP_OVERHEAD))); | |
520 | ||
521 | /* Set our hardware address while we're at it */ | |
522 | *(u64*)dev->dev_addr = guid; | |
523 | *(u64*)dev->broadcast = ~0x0ULL; | |
524 | } | |
525 | ||
526 | spin_unlock_irqrestore (&priv->lock, flags); | |
527 | } | |
528 | ||
529 | /* This function is called right before register_netdev */ | |
530 | static void ether1394_init_dev (struct net_device *dev) | |
531 | { | |
532 | /* Our functions */ | |
533 | dev->open = ether1394_open; | |
534 | dev->stop = ether1394_stop; | |
535 | dev->hard_start_xmit = ether1394_tx; | |
536 | dev->get_stats = ether1394_stats; | |
537 | dev->tx_timeout = ether1394_tx_timeout; | |
538 | dev->change_mtu = ether1394_change_mtu; | |
539 | ||
540 | dev->hard_header = ether1394_header; | |
541 | dev->rebuild_header = ether1394_rebuild_header; | |
542 | dev->hard_header_cache = ether1394_header_cache; | |
543 | dev->header_cache_update= ether1394_header_cache_update; | |
544 | dev->hard_header_parse = ether1394_header_parse; | |
545 | dev->set_mac_address = ether1394_mac_addr; | |
546 | SET_ETHTOOL_OPS(dev, ðtool_ops); | |
547 | ||
548 | /* Some constants */ | |
549 | dev->watchdog_timeo = ETHER1394_TIMEOUT; | |
550 | dev->flags = IFF_BROADCAST | IFF_MULTICAST; | |
551 | dev->features = NETIF_F_HIGHDMA; | |
552 | dev->addr_len = ETH1394_ALEN; | |
553 | dev->hard_header_len = ETH1394_HLEN; | |
554 | dev->type = ARPHRD_IEEE1394; | |
555 | ||
556 | ether1394_reset_priv (dev, 1); | |
557 | } | |
558 | ||
559 | /* | |
560 | * This function is called every time a card is found. It is generally called | |
561 | * when the module is installed. This is where we add all of our ethernet | |
562 | * devices. One for each host. | |
563 | */ | |
564 | static void ether1394_add_host (struct hpsb_host *host) | |
565 | { | |
566 | struct eth1394_host_info *hi = NULL; | |
567 | struct net_device *dev = NULL; | |
568 | struct eth1394_priv *priv; | |
569 | static int version_printed = 0; | |
570 | u64 fifo_addr; | |
571 | ||
572 | if (!(host->config_roms & HPSB_CONFIG_ROM_ENTRY_IP1394)) | |
573 | return; | |
574 | ||
575 | fifo_addr = hpsb_allocate_and_register_addrspace(ð1394_highlevel, | |
576 | host, | |
577 | &addr_ops, | |
578 | ETHER1394_REGION_ADDR_LEN, | |
579 | ETHER1394_REGION_ADDR_LEN, | |
580 | -1, -1); | |
581 | if (fifo_addr == ~0ULL) | |
582 | goto out; | |
583 | ||
584 | if (version_printed++ == 0) | |
585 | ETH1394_PRINT_G (KERN_INFO, "%s\n", version); | |
586 | ||
587 | /* We should really have our own alloc_hpsbdev() function in | |
588 | * net_init.c instead of calling the one for ethernet then hijacking | |
589 | * it for ourselves. That way we'd be a real networking device. */ | |
590 | dev = alloc_etherdev(sizeof (struct eth1394_priv)); | |
591 | ||
592 | if (dev == NULL) { | |
593 | ETH1394_PRINT_G (KERN_ERR, "Out of memory trying to allocate " | |
594 | "etherdevice for IEEE 1394 device %s-%d\n", | |
595 | host->driver->name, host->id); | |
596 | goto out; | |
597 | } | |
598 | ||
599 | SET_MODULE_OWNER(dev); | |
600 | SET_NETDEV_DEV(dev, &host->device); | |
601 | ||
602 | priv = netdev_priv(dev); | |
603 | ||
604 | INIT_LIST_HEAD(&priv->ip_node_list); | |
605 | ||
606 | spin_lock_init(&priv->lock); | |
607 | priv->host = host; | |
608 | priv->local_fifo = fifo_addr; | |
609 | ||
610 | hi = hpsb_create_hostinfo(ð1394_highlevel, host, sizeof(*hi)); | |
611 | ||
612 | if (hi == NULL) { | |
613 | ETH1394_PRINT_G (KERN_ERR, "Out of memory trying to create " | |
614 | "hostinfo for IEEE 1394 device %s-%d\n", | |
615 | host->driver->name, host->id); | |
616 | goto out; | |
617 | } | |
618 | ||
619 | ether1394_init_dev(dev); | |
620 | ||
621 | if (register_netdev (dev)) { | |
622 | ETH1394_PRINT (KERN_ERR, dev->name, "Error registering network driver\n"); | |
623 | goto out; | |
624 | } | |
625 | ||
626 | ETH1394_PRINT (KERN_INFO, dev->name, "IEEE-1394 IPv4 over 1394 Ethernet (fw-host%d)\n", | |
627 | host->id); | |
628 | ||
629 | hi->host = host; | |
630 | hi->dev = dev; | |
631 | ||
632 | /* Ignore validity in hopes that it will be set in the future. It'll | |
633 | * be checked when the eth device is opened. */ | |
634 | priv->broadcast_channel = host->csr.broadcast_channel & 0x3f; | |
635 | ||
3ae3d0d4 JM |
636 | priv->iso = hpsb_iso_recv_init(host, |
637 | ETHER1394_ISO_BUF_SIZE, | |
1da177e4 LT |
638 | ETHER1394_GASP_BUFFERS, |
639 | priv->broadcast_channel, | |
640 | HPSB_ISO_DMA_PACKET_PER_BUFFER, | |
641 | 1, ether1394_iso); | |
642 | if (priv->iso == NULL) { | |
643 | ETH1394_PRINT(KERN_ERR, dev->name, | |
644 | "Could not allocate isochronous receive context " | |
645 | "for the broadcast channel\n"); | |
646 | priv->bc_state = ETHER1394_BC_ERROR; | |
647 | } else { | |
648 | if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0) | |
649 | priv->bc_state = ETHER1394_BC_STOPPED; | |
650 | else | |
651 | priv->bc_state = ETHER1394_BC_RUNNING; | |
652 | } | |
653 | ||
654 | return; | |
655 | ||
656 | out: | |
657 | if (dev != NULL) | |
658 | free_netdev(dev); | |
659 | if (hi) | |
660 | hpsb_destroy_hostinfo(ð1394_highlevel, host); | |
661 | ||
662 | return; | |
663 | } | |
664 | ||
665 | /* Remove a card from our list */ | |
666 | static void ether1394_remove_host (struct hpsb_host *host) | |
667 | { | |
668 | struct eth1394_host_info *hi; | |
669 | ||
670 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
671 | if (hi != NULL) { | |
672 | struct eth1394_priv *priv = netdev_priv(hi->dev); | |
673 | ||
674 | hpsb_unregister_addrspace(ð1394_highlevel, host, | |
675 | priv->local_fifo); | |
676 | ||
677 | if (priv->iso != NULL) | |
678 | hpsb_iso_shutdown(priv->iso); | |
679 | ||
680 | if (hi->dev) { | |
681 | unregister_netdev (hi->dev); | |
682 | free_netdev(hi->dev); | |
683 | } | |
684 | } | |
685 | ||
686 | return; | |
687 | } | |
688 | ||
689 | /* A reset has just arisen */ | |
690 | static void ether1394_host_reset (struct hpsb_host *host) | |
691 | { | |
692 | struct eth1394_host_info *hi; | |
693 | struct eth1394_priv *priv; | |
694 | struct net_device *dev; | |
695 | struct list_head *lh, *n; | |
696 | struct eth1394_node_ref *node; | |
697 | struct eth1394_node_info *node_info; | |
698 | unsigned long flags; | |
699 | ||
700 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
701 | ||
702 | /* This can happen for hosts that we don't use */ | |
703 | if (hi == NULL) | |
704 | return; | |
705 | ||
706 | dev = hi->dev; | |
1934b8b6 | 707 | priv = (struct eth1394_priv *)netdev_priv(dev); |
1da177e4 LT |
708 | |
709 | /* Reset our private host data, but not our mtu */ | |
710 | netif_stop_queue (dev); | |
711 | ether1394_reset_priv (dev, 0); | |
712 | ||
713 | list_for_each_entry(node, &priv->ip_node_list, list) { | |
714 | node_info = (struct eth1394_node_info*)node->ud->device.driver_data; | |
715 | ||
716 | spin_lock_irqsave(&node_info->pdg.lock, flags); | |
717 | ||
718 | list_for_each_safe(lh, n, &node_info->pdg.list) { | |
719 | purge_partial_datagram(lh); | |
720 | } | |
721 | ||
722 | INIT_LIST_HEAD(&(node_info->pdg.list)); | |
723 | node_info->pdg.sz = 0; | |
724 | ||
725 | spin_unlock_irqrestore(&node_info->pdg.lock, flags); | |
726 | } | |
727 | ||
728 | netif_wake_queue (dev); | |
729 | } | |
730 | ||
731 | /****************************************** | |
732 | * HW Header net device functions | |
733 | ******************************************/ | |
734 | /* These functions have been adapted from net/ethernet/eth.c */ | |
735 | ||
736 | ||
737 | /* Create a fake MAC header for an arbitrary protocol layer. | |
738 | * saddr=NULL means use device source address | |
739 | * daddr=NULL means leave destination address (eg unresolved arp). */ | |
740 | static int ether1394_header(struct sk_buff *skb, struct net_device *dev, | |
741 | unsigned short type, void *daddr, void *saddr, | |
742 | unsigned len) | |
743 | { | |
744 | struct eth1394hdr *eth = (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN); | |
745 | ||
746 | eth->h_proto = htons(type); | |
747 | ||
748 | if (dev->flags & (IFF_LOOPBACK|IFF_NOARP)) { | |
749 | memset(eth->h_dest, 0, dev->addr_len); | |
750 | return(dev->hard_header_len); | |
751 | } | |
752 | ||
753 | if (daddr) { | |
754 | memcpy(eth->h_dest,daddr,dev->addr_len); | |
755 | return dev->hard_header_len; | |
756 | } | |
757 | ||
758 | return -dev->hard_header_len; | |
759 | ||
760 | } | |
761 | ||
762 | ||
763 | /* Rebuild the faked MAC header. This is called after an ARP | |
764 | * (or in future other address resolution) has completed on this | |
765 | * sk_buff. We now let ARP fill in the other fields. | |
766 | * | |
767 | * This routine CANNOT use cached dst->neigh! | |
768 | * Really, it is used only when dst->neigh is wrong. | |
769 | */ | |
770 | static int ether1394_rebuild_header(struct sk_buff *skb) | |
771 | { | |
772 | struct eth1394hdr *eth = (struct eth1394hdr *)skb->data; | |
773 | struct net_device *dev = skb->dev; | |
774 | ||
775 | switch (eth->h_proto) { | |
776 | ||
777 | #ifdef CONFIG_INET | |
778 | case __constant_htons(ETH_P_IP): | |
779 | return arp_find((unsigned char*)ð->h_dest, skb); | |
780 | #endif | |
781 | default: | |
782 | ETH1394_PRINT(KERN_DEBUG, dev->name, | |
783 | "unable to resolve type %04x addresses.\n", | |
784 | eth->h_proto); | |
785 | break; | |
786 | } | |
787 | ||
788 | return 0; | |
789 | } | |
790 | ||
791 | static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr) | |
792 | { | |
793 | struct net_device *dev = skb->dev; | |
794 | memcpy(haddr, dev->dev_addr, ETH1394_ALEN); | |
795 | return ETH1394_ALEN; | |
796 | } | |
797 | ||
798 | ||
799 | static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh) | |
800 | { | |
801 | unsigned short type = hh->hh_type; | |
802 | struct eth1394hdr *eth = (struct eth1394hdr*)(((u8*)hh->hh_data) + | |
803 | (16 - ETH1394_HLEN)); | |
804 | struct net_device *dev = neigh->dev; | |
805 | ||
806 | if (type == __constant_htons(ETH_P_802_3)) { | |
807 | return -1; | |
808 | } | |
809 | ||
810 | eth->h_proto = type; | |
811 | memcpy(eth->h_dest, neigh->ha, dev->addr_len); | |
812 | ||
813 | hh->hh_len = ETH1394_HLEN; | |
814 | return 0; | |
815 | } | |
816 | ||
817 | /* Called by Address Resolution module to notify changes in address. */ | |
818 | static void ether1394_header_cache_update(struct hh_cache *hh, | |
819 | struct net_device *dev, | |
820 | unsigned char * haddr) | |
821 | { | |
822 | memcpy(((u8*)hh->hh_data) + (16 - ETH1394_HLEN), haddr, dev->addr_len); | |
823 | } | |
824 | ||
825 | static int ether1394_mac_addr(struct net_device *dev, void *p) | |
826 | { | |
827 | if (netif_running(dev)) | |
828 | return -EBUSY; | |
829 | ||
830 | /* Not going to allow setting the MAC address, we really need to use | |
831 | * the real one supplied by the hardware */ | |
832 | return -EINVAL; | |
833 | } | |
834 | ||
835 | ||
836 | ||
837 | /****************************************** | |
838 | * Datagram reception code | |
839 | ******************************************/ | |
840 | ||
841 | /* Copied from net/ethernet/eth.c */ | |
842 | static inline u16 ether1394_type_trans(struct sk_buff *skb, | |
843 | struct net_device *dev) | |
844 | { | |
845 | struct eth1394hdr *eth; | |
846 | unsigned char *rawp; | |
847 | ||
848 | skb->mac.raw = skb->data; | |
849 | skb_pull (skb, ETH1394_HLEN); | |
850 | eth = eth1394_hdr(skb); | |
851 | ||
852 | if (*eth->h_dest & 1) { | |
853 | if (memcmp(eth->h_dest, dev->broadcast, dev->addr_len)==0) | |
854 | skb->pkt_type = PACKET_BROADCAST; | |
855 | #if 0 | |
856 | else | |
857 | skb->pkt_type = PACKET_MULTICAST; | |
858 | #endif | |
859 | } else { | |
860 | if (memcmp(eth->h_dest, dev->dev_addr, dev->addr_len)) | |
861 | skb->pkt_type = PACKET_OTHERHOST; | |
862 | } | |
863 | ||
864 | if (ntohs (eth->h_proto) >= 1536) | |
865 | return eth->h_proto; | |
866 | ||
867 | rawp = skb->data; | |
868 | ||
869 | if (*(unsigned short *)rawp == 0xFFFF) | |
870 | return htons (ETH_P_802_3); | |
871 | ||
872 | return htons (ETH_P_802_2); | |
873 | } | |
874 | ||
875 | /* Parse an encapsulated IP1394 header into an ethernet frame packet. | |
876 | * We also perform ARP translation here, if need be. */ | |
877 | static inline u16 ether1394_parse_encap(struct sk_buff *skb, | |
878 | struct net_device *dev, | |
879 | nodeid_t srcid, nodeid_t destid, | |
880 | u16 ether_type) | |
881 | { | |
882 | struct eth1394_priv *priv = netdev_priv(dev); | |
883 | u64 dest_hw; | |
884 | unsigned short ret = 0; | |
885 | ||
886 | /* Setup our hw addresses. We use these to build the | |
887 | * ethernet header. */ | |
888 | if (destid == (LOCAL_BUS | ALL_NODES)) | |
889 | dest_hw = ~0ULL; /* broadcast */ | |
890 | else | |
891 | dest_hw = cpu_to_be64((((u64)priv->host->csr.guid_hi) << 32) | | |
892 | priv->host->csr.guid_lo); | |
893 | ||
894 | /* If this is an ARP packet, convert it. First, we want to make | |
895 | * use of some of the fields, since they tell us a little bit | |
896 | * about the sending machine. */ | |
897 | if (ether_type == __constant_htons (ETH_P_ARP)) { | |
898 | struct eth1394_arp *arp1394 = (struct eth1394_arp*)skb->data; | |
899 | struct arphdr *arp = (struct arphdr *)skb->data; | |
900 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
901 | u64 fifo_addr = (u64)ntohs(arp1394->fifo_hi) << 32 | | |
902 | ntohl(arp1394->fifo_lo); | |
903 | u8 max_rec = min(priv->host->csr.max_rec, | |
904 | (u8)(arp1394->max_rec)); | |
905 | int sspd = arp1394->sspd; | |
906 | u16 maxpayload; | |
907 | struct eth1394_node_ref *node; | |
908 | struct eth1394_node_info *node_info; | |
909 | ||
910 | /* Sanity check. MacOSX seems to be sending us 131 in this | |
911 | * field (atleast on my Panther G5). Not sure why. */ | |
912 | if (sspd > 5 || sspd < 0) | |
913 | sspd = 0; | |
914 | ||
915 | maxpayload = min(eth1394_speedto_maxpayload[sspd], (u16)(1 << (max_rec + 1))); | |
916 | ||
917 | node = eth1394_find_node_guid(&priv->ip_node_list, | |
918 | be64_to_cpu(arp1394->s_uniq_id)); | |
919 | if (!node) { | |
920 | return 0; | |
921 | } | |
922 | ||
923 | node_info = (struct eth1394_node_info*)node->ud->device.driver_data; | |
924 | ||
925 | /* Update our speed/payload/fifo_offset table */ | |
926 | node_info->maxpayload = maxpayload; | |
927 | node_info->sspd = sspd; | |
928 | node_info->fifo = fifo_addr; | |
929 | ||
930 | /* Now that we're done with the 1394 specific stuff, we'll | |
931 | * need to alter some of the data. Believe it or not, all | |
932 | * that needs to be done is sender_IP_address needs to be | |
933 | * moved, the destination hardware address get stuffed | |
934 | * in and the hardware address length set to 8. | |
935 | * | |
936 | * IMPORTANT: The code below overwrites 1394 specific data | |
937 | * needed above so keep the munging of the data for the | |
938 | * higher level IP stack last. */ | |
939 | ||
940 | arp->ar_hln = 8; | |
941 | arp_ptr += arp->ar_hln; /* skip over sender unique id */ | |
942 | *(u32*)arp_ptr = arp1394->sip; /* move sender IP addr */ | |
943 | arp_ptr += arp->ar_pln; /* skip over sender IP addr */ | |
944 | ||
945 | if (arp->ar_op == 1) | |
946 | /* just set ARP req target unique ID to 0 */ | |
947 | *((u64*)arp_ptr) = 0; | |
948 | else | |
949 | *((u64*)arp_ptr) = *((u64*)dev->dev_addr); | |
950 | } | |
951 | ||
952 | /* Now add the ethernet header. */ | |
953 | if (dev->hard_header (skb, dev, __constant_ntohs (ether_type), | |
954 | &dest_hw, NULL, skb->len) >= 0) | |
955 | ret = ether1394_type_trans(skb, dev); | |
956 | ||
957 | return ret; | |
958 | } | |
959 | ||
960 | static inline int fragment_overlap(struct list_head *frag_list, int offset, int len) | |
961 | { | |
962 | struct fragment_info *fi; | |
963 | ||
964 | list_for_each_entry(fi, frag_list, list) { | |
965 | if ( ! ((offset > (fi->offset + fi->len - 1)) || | |
966 | ((offset + len - 1) < fi->offset))) | |
967 | return 1; | |
968 | } | |
969 | return 0; | |
970 | } | |
971 | ||
972 | static inline struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl) | |
973 | { | |
974 | struct partial_datagram *pd; | |
975 | ||
976 | list_for_each_entry(pd, pdgl, list) { | |
977 | if (pd->dgl == dgl) | |
978 | return &pd->list; | |
979 | } | |
980 | return NULL; | |
981 | } | |
982 | ||
983 | /* Assumes that new fragment does not overlap any existing fragments */ | |
984 | static inline int new_fragment(struct list_head *frag_info, int offset, int len) | |
985 | { | |
986 | struct list_head *lh; | |
987 | struct fragment_info *fi, *fi2, *new; | |
988 | ||
989 | list_for_each(lh, frag_info) { | |
990 | fi = list_entry(lh, struct fragment_info, list); | |
991 | if ((fi->offset + fi->len) == offset) { | |
992 | /* The new fragment can be tacked on to the end */ | |
993 | fi->len += len; | |
994 | /* Did the new fragment plug a hole? */ | |
995 | fi2 = list_entry(lh->next, struct fragment_info, list); | |
996 | if ((fi->offset + fi->len) == fi2->offset) { | |
997 | /* glue fragments together */ | |
998 | fi->len += fi2->len; | |
999 | list_del(lh->next); | |
1000 | kfree(fi2); | |
1001 | } | |
1002 | return 0; | |
1003 | } else if ((offset + len) == fi->offset) { | |
1004 | /* The new fragment can be tacked on to the beginning */ | |
1005 | fi->offset = offset; | |
1006 | fi->len += len; | |
1007 | /* Did the new fragment plug a hole? */ | |
1008 | fi2 = list_entry(lh->prev, struct fragment_info, list); | |
1009 | if ((fi2->offset + fi2->len) == fi->offset) { | |
1010 | /* glue fragments together */ | |
1011 | fi2->len += fi->len; | |
1012 | list_del(lh); | |
1013 | kfree(fi); | |
1014 | } | |
1015 | return 0; | |
1016 | } else if (offset > (fi->offset + fi->len)) { | |
1017 | break; | |
1018 | } else if ((offset + len) < fi->offset) { | |
1019 | lh = lh->prev; | |
1020 | break; | |
1021 | } | |
1022 | } | |
1023 | ||
1024 | new = kmalloc(sizeof(struct fragment_info), GFP_ATOMIC); | |
1025 | if (!new) | |
1026 | return -ENOMEM; | |
1027 | ||
1028 | new->offset = offset; | |
1029 | new->len = len; | |
1030 | ||
1031 | list_add(&new->list, lh); | |
1032 | ||
1033 | return 0; | |
1034 | } | |
1035 | ||
1036 | static inline int new_partial_datagram(struct net_device *dev, | |
1037 | struct list_head *pdgl, int dgl, | |
1038 | int dg_size, char *frag_buf, | |
1039 | int frag_off, int frag_len) | |
1040 | { | |
1041 | struct partial_datagram *new; | |
1042 | ||
1043 | new = kmalloc(sizeof(struct partial_datagram), GFP_ATOMIC); | |
1044 | if (!new) | |
1045 | return -ENOMEM; | |
1046 | ||
1047 | INIT_LIST_HEAD(&new->frag_info); | |
1048 | ||
1049 | if (new_fragment(&new->frag_info, frag_off, frag_len) < 0) { | |
1050 | kfree(new); | |
1051 | return -ENOMEM; | |
1052 | } | |
1053 | ||
1054 | new->dgl = dgl; | |
1055 | new->dg_size = dg_size; | |
1056 | ||
1057 | new->skb = dev_alloc_skb(dg_size + dev->hard_header_len + 15); | |
1058 | if (!new->skb) { | |
1059 | struct fragment_info *fi = list_entry(new->frag_info.next, | |
1060 | struct fragment_info, | |
1061 | list); | |
1062 | kfree(fi); | |
1063 | kfree(new); | |
1064 | return -ENOMEM; | |
1065 | } | |
1066 | ||
1067 | skb_reserve(new->skb, (dev->hard_header_len + 15) & ~15); | |
1068 | new->pbuf = skb_put(new->skb, dg_size); | |
1069 | memcpy(new->pbuf + frag_off, frag_buf, frag_len); | |
1070 | ||
1071 | list_add(&new->list, pdgl); | |
1072 | ||
1073 | return 0; | |
1074 | } | |
1075 | ||
1076 | static inline int update_partial_datagram(struct list_head *pdgl, struct list_head *lh, | |
1077 | char *frag_buf, int frag_off, int frag_len) | |
1078 | { | |
1079 | struct partial_datagram *pd = list_entry(lh, struct partial_datagram, list); | |
1080 | ||
1081 | if (new_fragment(&pd->frag_info, frag_off, frag_len) < 0) { | |
1082 | return -ENOMEM; | |
1083 | } | |
1084 | ||
1085 | memcpy(pd->pbuf + frag_off, frag_buf, frag_len); | |
1086 | ||
1087 | /* Move list entry to beginnig of list so that oldest partial | |
1088 | * datagrams percolate to the end of the list */ | |
1089 | list_del(lh); | |
1090 | list_add(lh, pdgl); | |
1091 | ||
1092 | return 0; | |
1093 | } | |
1094 | ||
1095 | static inline int is_datagram_complete(struct list_head *lh, int dg_size) | |
1096 | { | |
1097 | struct partial_datagram *pd = list_entry(lh, struct partial_datagram, list); | |
1098 | struct fragment_info *fi = list_entry(pd->frag_info.next, | |
1099 | struct fragment_info, list); | |
1100 | ||
1101 | return (fi->len == dg_size); | |
1102 | } | |
1103 | ||
1104 | /* Packet reception. We convert the IP1394 encapsulation header to an | |
1105 | * ethernet header, and fill it with some of our other fields. This is | |
1106 | * an incoming packet from the 1394 bus. */ | |
1107 | static int ether1394_data_handler(struct net_device *dev, int srcid, int destid, | |
1108 | char *buf, int len) | |
1109 | { | |
1110 | struct sk_buff *skb; | |
1111 | unsigned long flags; | |
1112 | struct eth1394_priv *priv = netdev_priv(dev); | |
1113 | union eth1394_hdr *hdr = (union eth1394_hdr *)buf; | |
1114 | u16 ether_type = 0; /* initialized to clear warning */ | |
1115 | int hdr_len; | |
1116 | struct unit_directory *ud = priv->ud_list[NODEID_TO_NODE(srcid)]; | |
1117 | struct eth1394_node_info *node_info; | |
1118 | ||
1119 | if (!ud) { | |
1120 | struct eth1394_node_ref *node; | |
1121 | node = eth1394_find_node_nodeid(&priv->ip_node_list, srcid); | |
1122 | if (!node) { | |
1123 | HPSB_PRINT(KERN_ERR, "ether1394 rx: sender nodeid " | |
1124 | "lookup failure: " NODE_BUS_FMT, | |
1125 | NODE_BUS_ARGS(priv->host, srcid)); | |
1126 | priv->stats.rx_dropped++; | |
1127 | return -1; | |
1128 | } | |
1129 | ud = node->ud; | |
1130 | ||
1131 | priv->ud_list[NODEID_TO_NODE(srcid)] = ud; | |
1132 | } | |
1133 | ||
1134 | node_info = (struct eth1394_node_info*)ud->device.driver_data; | |
1135 | ||
1136 | /* First, did we receive a fragmented or unfragmented datagram? */ | |
1137 | hdr->words.word1 = ntohs(hdr->words.word1); | |
1138 | ||
1139 | hdr_len = hdr_type_len[hdr->common.lf]; | |
1140 | ||
1141 | if (hdr->common.lf == ETH1394_HDR_LF_UF) { | |
1142 | /* An unfragmented datagram has been received by the ieee1394 | |
1143 | * bus. Build an skbuff around it so we can pass it to the | |
1144 | * high level network layer. */ | |
1145 | ||
1146 | skb = dev_alloc_skb(len + dev->hard_header_len + 15); | |
1147 | if (!skb) { | |
1148 | HPSB_PRINT (KERN_ERR, "ether1394 rx: low on mem\n"); | |
1149 | priv->stats.rx_dropped++; | |
1150 | return -1; | |
1151 | } | |
1152 | skb_reserve(skb, (dev->hard_header_len + 15) & ~15); | |
1153 | memcpy(skb_put(skb, len - hdr_len), buf + hdr_len, len - hdr_len); | |
1154 | ether_type = hdr->uf.ether_type; | |
1155 | } else { | |
1156 | /* A datagram fragment has been received, now the fun begins. */ | |
1157 | ||
1158 | struct list_head *pdgl, *lh; | |
1159 | struct partial_datagram *pd; | |
1160 | int fg_off; | |
1161 | int fg_len = len - hdr_len; | |
1162 | int dg_size; | |
1163 | int dgl; | |
1164 | int retval; | |
1165 | struct pdg_list *pdg = &(node_info->pdg); | |
1166 | ||
1167 | hdr->words.word3 = ntohs(hdr->words.word3); | |
1168 | /* The 4th header word is reserved so no need to do ntohs() */ | |
1169 | ||
1170 | if (hdr->common.lf == ETH1394_HDR_LF_FF) { | |
1171 | ether_type = hdr->ff.ether_type; | |
1172 | dgl = hdr->ff.dgl; | |
1173 | dg_size = hdr->ff.dg_size + 1; | |
1174 | fg_off = 0; | |
1175 | } else { | |
1176 | hdr->words.word2 = ntohs(hdr->words.word2); | |
1177 | dgl = hdr->sf.dgl; | |
1178 | dg_size = hdr->sf.dg_size + 1; | |
1179 | fg_off = hdr->sf.fg_off; | |
1180 | } | |
1181 | spin_lock_irqsave(&pdg->lock, flags); | |
1182 | ||
1183 | pdgl = &(pdg->list); | |
1184 | lh = find_partial_datagram(pdgl, dgl); | |
1185 | ||
1186 | if (lh == NULL) { | |
1187 | while (pdg->sz >= max_partial_datagrams) { | |
1188 | /* remove the oldest */ | |
1189 | purge_partial_datagram(pdgl->prev); | |
1190 | pdg->sz--; | |
1191 | } | |
1192 | ||
1193 | retval = new_partial_datagram(dev, pdgl, dgl, dg_size, | |
1194 | buf + hdr_len, fg_off, | |
1195 | fg_len); | |
1196 | if (retval < 0) { | |
1197 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1198 | goto bad_proto; | |
1199 | } | |
1200 | pdg->sz++; | |
1201 | lh = find_partial_datagram(pdgl, dgl); | |
1202 | } else { | |
1203 | struct partial_datagram *pd; | |
1204 | ||
1205 | pd = list_entry(lh, struct partial_datagram, list); | |
1206 | ||
1207 | if (fragment_overlap(&pd->frag_info, fg_off, fg_len)) { | |
1208 | /* Overlapping fragments, obliterate old | |
1209 | * datagram and start new one. */ | |
1210 | purge_partial_datagram(lh); | |
1211 | retval = new_partial_datagram(dev, pdgl, dgl, | |
1212 | dg_size, | |
1213 | buf + hdr_len, | |
1214 | fg_off, fg_len); | |
1215 | if (retval < 0) { | |
1216 | pdg->sz--; | |
1217 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1218 | goto bad_proto; | |
1219 | } | |
1220 | } else { | |
1221 | retval = update_partial_datagram(pdgl, lh, | |
1222 | buf + hdr_len, | |
1223 | fg_off, fg_len); | |
1224 | if (retval < 0) { | |
1225 | /* Couldn't save off fragment anyway | |
1226 | * so might as well obliterate the | |
1227 | * datagram now. */ | |
1228 | purge_partial_datagram(lh); | |
1229 | pdg->sz--; | |
1230 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1231 | goto bad_proto; | |
1232 | } | |
1233 | } /* fragment overlap */ | |
1234 | } /* new datagram or add to existing one */ | |
1235 | ||
1236 | pd = list_entry(lh, struct partial_datagram, list); | |
1237 | ||
1238 | if (hdr->common.lf == ETH1394_HDR_LF_FF) { | |
1239 | pd->ether_type = ether_type; | |
1240 | } | |
1241 | ||
1242 | if (is_datagram_complete(lh, dg_size)) { | |
1243 | ether_type = pd->ether_type; | |
1244 | pdg->sz--; | |
1245 | skb = skb_get(pd->skb); | |
1246 | purge_partial_datagram(lh); | |
1247 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1248 | } else { | |
1249 | /* Datagram is not complete, we're done for the | |
1250 | * moment. */ | |
1251 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1252 | return 0; | |
1253 | } | |
1254 | } /* unframgented datagram or fragmented one */ | |
1255 | ||
1256 | /* Write metadata, and then pass to the receive level */ | |
1257 | skb->dev = dev; | |
1258 | skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */ | |
1259 | ||
1260 | /* Parse the encapsulation header. This actually does the job of | |
1261 | * converting to an ethernet frame header, aswell as arp | |
1262 | * conversion if needed. ARP conversion is easier in this | |
1263 | * direction, since we are using ethernet as our backend. */ | |
1264 | skb->protocol = ether1394_parse_encap(skb, dev, srcid, destid, | |
1265 | ether_type); | |
1266 | ||
1267 | ||
1268 | spin_lock_irqsave(&priv->lock, flags); | |
1269 | if (!skb->protocol) { | |
1270 | priv->stats.rx_errors++; | |
1271 | priv->stats.rx_dropped++; | |
1272 | dev_kfree_skb_any(skb); | |
1273 | goto bad_proto; | |
1274 | } | |
1275 | ||
1276 | if (netif_rx(skb) == NET_RX_DROP) { | |
1277 | priv->stats.rx_errors++; | |
1278 | priv->stats.rx_dropped++; | |
1279 | goto bad_proto; | |
1280 | } | |
1281 | ||
1282 | /* Statistics */ | |
1283 | priv->stats.rx_packets++; | |
1284 | priv->stats.rx_bytes += skb->len; | |
1285 | ||
1286 | bad_proto: | |
1287 | if (netif_queue_stopped(dev)) | |
1288 | netif_wake_queue(dev); | |
1289 | spin_unlock_irqrestore(&priv->lock, flags); | |
1290 | ||
1291 | dev->last_rx = jiffies; | |
1292 | ||
1293 | return 0; | |
1294 | } | |
1295 | ||
1296 | static int ether1394_write(struct hpsb_host *host, int srcid, int destid, | |
1297 | quadlet_t *data, u64 addr, size_t len, u16 flags) | |
1298 | { | |
1299 | struct eth1394_host_info *hi; | |
1300 | ||
1301 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
1302 | if (hi == NULL) { | |
1303 | ETH1394_PRINT_G(KERN_ERR, "Could not find net device for host %s\n", | |
1304 | host->driver->name); | |
1305 | return RCODE_ADDRESS_ERROR; | |
1306 | } | |
1307 | ||
1308 | if (ether1394_data_handler(hi->dev, srcid, destid, (char*)data, len)) | |
1309 | return RCODE_ADDRESS_ERROR; | |
1310 | else | |
1311 | return RCODE_COMPLETE; | |
1312 | } | |
1313 | ||
1314 | static void ether1394_iso(struct hpsb_iso *iso) | |
1315 | { | |
1316 | quadlet_t *data; | |
1317 | char *buf; | |
1318 | struct eth1394_host_info *hi; | |
1319 | struct net_device *dev; | |
1320 | struct eth1394_priv *priv; | |
1321 | unsigned int len; | |
1322 | u32 specifier_id; | |
1323 | u16 source_id; | |
1324 | int i; | |
1325 | int nready; | |
1326 | ||
1327 | hi = hpsb_get_hostinfo(ð1394_highlevel, iso->host); | |
1328 | if (hi == NULL) { | |
1329 | ETH1394_PRINT_G(KERN_ERR, "Could not find net device for host %s\n", | |
1330 | iso->host->driver->name); | |
1331 | return; | |
1332 | } | |
1333 | ||
1334 | dev = hi->dev; | |
1335 | ||
1336 | nready = hpsb_iso_n_ready(iso); | |
1337 | for (i = 0; i < nready; i++) { | |
1338 | struct hpsb_iso_packet_info *info = | |
1339 | &iso->infos[(iso->first_packet + i) % iso->buf_packets]; | |
1340 | data = (quadlet_t*) (iso->data_buf.kvirt + info->offset); | |
1341 | ||
1342 | /* skip over GASP header */ | |
1343 | buf = (char *)data + 8; | |
1344 | len = info->len - 8; | |
1345 | ||
1346 | specifier_id = (((be32_to_cpu(data[0]) & 0xffff) << 8) | | |
1347 | ((be32_to_cpu(data[1]) & 0xff000000) >> 24)); | |
1348 | source_id = be32_to_cpu(data[0]) >> 16; | |
1349 | ||
1350 | priv = netdev_priv(dev); | |
1351 | ||
1352 | if (info->channel != (iso->host->csr.broadcast_channel & 0x3f) || | |
1353 | specifier_id != ETHER1394_GASP_SPECIFIER_ID) { | |
1354 | /* This packet is not for us */ | |
1355 | continue; | |
1356 | } | |
1357 | ether1394_data_handler(dev, source_id, LOCAL_BUS | ALL_NODES, | |
1358 | buf, len); | |
1359 | } | |
1360 | ||
1361 | hpsb_iso_recv_release_packets(iso, i); | |
1362 | ||
1363 | dev->last_rx = jiffies; | |
1364 | } | |
1365 | ||
1366 | /****************************************** | |
1367 | * Datagram transmission code | |
1368 | ******************************************/ | |
1369 | ||
1370 | /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire | |
1371 | * arphdr) is the same format as the ip1394 header, so they overlap. The rest | |
1372 | * needs to be munged a bit. The remainder of the arphdr is formatted based | |
1373 | * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to | |
1374 | * judge. | |
1375 | * | |
1376 | * Now that the EUI is used for the hardware address all we need to do to make | |
1377 | * this work for 1394 is to insert 2 quadlets that contain max_rec size, | |
1378 | * speed, and unicast FIFO address information between the sender_unique_id | |
1379 | * and the IP addresses. | |
1380 | */ | |
1381 | static inline void ether1394_arp_to_1394arp(struct sk_buff *skb, | |
1382 | struct net_device *dev) | |
1383 | { | |
1384 | struct eth1394_priv *priv = netdev_priv(dev); | |
1385 | ||
1386 | struct arphdr *arp = (struct arphdr *)skb->data; | |
1387 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
1388 | struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data; | |
1389 | ||
1390 | /* Believe it or not, all that need to happen is sender IP get moved | |
1391 | * and set hw_addr_len, max_rec, sspd, fifo_hi and fifo_lo. */ | |
1392 | arp1394->hw_addr_len = 16; | |
1393 | arp1394->sip = *(u32*)(arp_ptr + ETH1394_ALEN); | |
1394 | arp1394->max_rec = priv->host->csr.max_rec; | |
1395 | arp1394->sspd = priv->host->csr.lnk_spd; | |
1396 | arp1394->fifo_hi = htons (priv->local_fifo >> 32); | |
1397 | arp1394->fifo_lo = htonl (priv->local_fifo & ~0x0); | |
1398 | ||
1399 | return; | |
1400 | } | |
1401 | ||
1402 | /* We need to encapsulate the standard header with our own. We use the | |
1403 | * ethernet header's proto for our own. */ | |
1404 | static inline unsigned int ether1394_encapsulate_prep(unsigned int max_payload, | |
1405 | int proto, | |
1406 | union eth1394_hdr *hdr, | |
1407 | u16 dg_size, u16 dgl) | |
1408 | { | |
1409 | unsigned int adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_UF]; | |
1410 | ||
1411 | /* Does it all fit in one packet? */ | |
1412 | if (dg_size <= adj_max_payload) { | |
1413 | hdr->uf.lf = ETH1394_HDR_LF_UF; | |
1414 | hdr->uf.ether_type = proto; | |
1415 | } else { | |
1416 | hdr->ff.lf = ETH1394_HDR_LF_FF; | |
1417 | hdr->ff.ether_type = proto; | |
1418 | hdr->ff.dg_size = dg_size - 1; | |
1419 | hdr->ff.dgl = dgl; | |
1420 | adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_FF]; | |
1421 | } | |
1422 | return((dg_size + (adj_max_payload - 1)) / adj_max_payload); | |
1423 | } | |
1424 | ||
1425 | static inline unsigned int ether1394_encapsulate(struct sk_buff *skb, | |
1426 | unsigned int max_payload, | |
1427 | union eth1394_hdr *hdr) | |
1428 | { | |
1429 | union eth1394_hdr *bufhdr; | |
1430 | int ftype = hdr->common.lf; | |
1431 | int hdrsz = hdr_type_len[ftype]; | |
1432 | unsigned int adj_max_payload = max_payload - hdrsz; | |
1433 | ||
1434 | switch(ftype) { | |
1435 | case ETH1394_HDR_LF_UF: | |
1436 | bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz); | |
1437 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1438 | bufhdr->words.word2 = hdr->words.word2; | |
1439 | break; | |
1440 | ||
1441 | case ETH1394_HDR_LF_FF: | |
1442 | bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz); | |
1443 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1444 | bufhdr->words.word2 = hdr->words.word2; | |
1445 | bufhdr->words.word3 = htons(hdr->words.word3); | |
1446 | bufhdr->words.word4 = 0; | |
1447 | ||
1448 | /* Set frag type here for future interior fragments */ | |
1449 | hdr->common.lf = ETH1394_HDR_LF_IF; | |
1450 | hdr->sf.fg_off = 0; | |
1451 | break; | |
1452 | ||
1453 | default: | |
1454 | hdr->sf.fg_off += adj_max_payload; | |
1455 | bufhdr = (union eth1394_hdr *)skb_pull(skb, adj_max_payload); | |
1456 | if (max_payload >= skb->len) | |
1457 | hdr->common.lf = ETH1394_HDR_LF_LF; | |
1458 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1459 | bufhdr->words.word2 = htons(hdr->words.word2); | |
1460 | bufhdr->words.word3 = htons(hdr->words.word3); | |
1461 | bufhdr->words.word4 = 0; | |
1462 | } | |
1463 | ||
1464 | return min(max_payload, skb->len); | |
1465 | } | |
1466 | ||
1467 | static inline struct hpsb_packet *ether1394_alloc_common_packet(struct hpsb_host *host) | |
1468 | { | |
1469 | struct hpsb_packet *p; | |
1470 | ||
1471 | p = hpsb_alloc_packet(0); | |
1472 | if (p) { | |
1473 | p->host = host; | |
1474 | p->generation = get_hpsb_generation(host); | |
1475 | p->type = hpsb_async; | |
1476 | } | |
1477 | return p; | |
1478 | } | |
1479 | ||
1480 | static inline int ether1394_prep_write_packet(struct hpsb_packet *p, | |
1481 | struct hpsb_host *host, | |
1482 | nodeid_t node, u64 addr, | |
1483 | void * data, int tx_len) | |
1484 | { | |
1485 | p->node_id = node; | |
1486 | p->data = NULL; | |
1487 | ||
1488 | p->tcode = TCODE_WRITEB; | |
1489 | p->header[1] = (host->node_id << 16) | (addr >> 32); | |
1490 | p->header[2] = addr & 0xffffffff; | |
1491 | ||
1492 | p->header_size = 16; | |
1493 | p->expect_response = 1; | |
1494 | ||
1495 | if (hpsb_get_tlabel(p)) { | |
1496 | ETH1394_PRINT_G(KERN_ERR, "No more tlabels left while sending " | |
1497 | "to node " NODE_BUS_FMT "\n", NODE_BUS_ARGS(host, node)); | |
1498 | return -1; | |
1499 | } | |
1500 | p->header[0] = (p->node_id << 16) | (p->tlabel << 10) | |
1501 | | (1 << 8) | (TCODE_WRITEB << 4); | |
1502 | ||
1503 | p->header[3] = tx_len << 16; | |
1504 | p->data_size = (tx_len + 3) & ~3; | |
1505 | p->data = (quadlet_t*)data; | |
1506 | ||
1507 | return 0; | |
1508 | } | |
1509 | ||
1510 | static inline void ether1394_prep_gasp_packet(struct hpsb_packet *p, | |
1511 | struct eth1394_priv *priv, | |
1512 | struct sk_buff *skb, int length) | |
1513 | { | |
1514 | p->header_size = 4; | |
1515 | p->tcode = TCODE_STREAM_DATA; | |
1516 | ||
1517 | p->header[0] = (length << 16) | (3 << 14) | |
1518 | | ((priv->broadcast_channel) << 8) | |
1519 | | (TCODE_STREAM_DATA << 4); | |
1520 | p->data_size = length; | |
1521 | p->data = ((quadlet_t*)skb->data) - 2; | |
1522 | p->data[0] = cpu_to_be32((priv->host->node_id << 16) | | |
1523 | ETHER1394_GASP_SPECIFIER_ID_HI); | |
1524 | p->data[1] = __constant_cpu_to_be32((ETHER1394_GASP_SPECIFIER_ID_LO << 24) | | |
1525 | ETHER1394_GASP_VERSION); | |
1526 | ||
1527 | /* Setting the node id to ALL_NODES (not LOCAL_BUS | ALL_NODES) | |
1528 | * prevents hpsb_send_packet() from setting the speed to an arbitrary | |
1529 | * value based on packet->node_id if packet->node_id is not set. */ | |
1530 | p->node_id = ALL_NODES; | |
1531 | p->speed_code = priv->bc_sspd; | |
1532 | } | |
1533 | ||
1534 | static inline void ether1394_free_packet(struct hpsb_packet *packet) | |
1535 | { | |
1536 | if (packet->tcode != TCODE_STREAM_DATA) | |
1537 | hpsb_free_tlabel(packet); | |
1538 | hpsb_free_packet(packet); | |
1539 | } | |
1540 | ||
1541 | static void ether1394_complete_cb(void *__ptask); | |
1542 | ||
1543 | static int ether1394_send_packet(struct packet_task *ptask, unsigned int tx_len) | |
1544 | { | |
1545 | struct eth1394_priv *priv = ptask->priv; | |
1546 | struct hpsb_packet *packet = NULL; | |
1547 | ||
1548 | packet = ether1394_alloc_common_packet(priv->host); | |
1549 | if (!packet) | |
1550 | return -1; | |
1551 | ||
1552 | if (ptask->tx_type == ETH1394_GASP) { | |
1553 | int length = tx_len + (2 * sizeof(quadlet_t)); | |
1554 | ||
1555 | ether1394_prep_gasp_packet(packet, priv, ptask->skb, length); | |
1556 | } else if (ether1394_prep_write_packet(packet, priv->host, | |
1557 | ptask->dest_node, | |
1558 | ptask->addr, ptask->skb->data, | |
1559 | tx_len)) { | |
1560 | hpsb_free_packet(packet); | |
1561 | return -1; | |
1562 | } | |
1563 | ||
1564 | ptask->packet = packet; | |
1565 | hpsb_set_packet_complete_task(ptask->packet, ether1394_complete_cb, | |
1566 | ptask); | |
1567 | ||
1568 | if (hpsb_send_packet(packet) < 0) { | |
1569 | ether1394_free_packet(packet); | |
1570 | return -1; | |
1571 | } | |
1572 | ||
1573 | return 0; | |
1574 | } | |
1575 | ||
1576 | ||
1577 | /* Task function to be run when a datagram transmission is completed */ | |
1578 | static inline void ether1394_dg_complete(struct packet_task *ptask, int fail) | |
1579 | { | |
1580 | struct sk_buff *skb = ptask->skb; | |
1581 | struct net_device *dev = skb->dev; | |
1582 | struct eth1394_priv *priv = netdev_priv(dev); | |
1583 | unsigned long flags; | |
1584 | ||
1585 | /* Statistics */ | |
1586 | spin_lock_irqsave(&priv->lock, flags); | |
1587 | if (fail) { | |
1588 | priv->stats.tx_dropped++; | |
1589 | priv->stats.tx_errors++; | |
1590 | } else { | |
1591 | priv->stats.tx_bytes += skb->len; | |
1592 | priv->stats.tx_packets++; | |
1593 | } | |
1594 | spin_unlock_irqrestore(&priv->lock, flags); | |
1595 | ||
1596 | dev_kfree_skb_any(skb); | |
1597 | kmem_cache_free(packet_task_cache, ptask); | |
1598 | } | |
1599 | ||
1600 | ||
1601 | /* Callback for when a packet has been sent and the status of that packet is | |
1602 | * known */ | |
1603 | static void ether1394_complete_cb(void *__ptask) | |
1604 | { | |
1605 | struct packet_task *ptask = (struct packet_task *)__ptask; | |
1606 | struct hpsb_packet *packet = ptask->packet; | |
1607 | int fail = 0; | |
1608 | ||
1609 | if (packet->tcode != TCODE_STREAM_DATA) | |
1610 | fail = hpsb_packet_success(packet); | |
1611 | ||
1612 | ether1394_free_packet(packet); | |
1613 | ||
1614 | ptask->outstanding_pkts--; | |
1615 | if (ptask->outstanding_pkts > 0 && !fail) { | |
1616 | int tx_len; | |
1617 | ||
1618 | /* Add the encapsulation header to the fragment */ | |
1619 | tx_len = ether1394_encapsulate(ptask->skb, ptask->max_payload, | |
1620 | &ptask->hdr); | |
1621 | if (ether1394_send_packet(ptask, tx_len)) | |
1622 | ether1394_dg_complete(ptask, 1); | |
1623 | } else { | |
1624 | ether1394_dg_complete(ptask, fail); | |
1625 | } | |
1626 | } | |
1627 | ||
1628 | ||
1629 | ||
1630 | /* Transmit a packet (called by kernel) */ | |
1631 | static int ether1394_tx (struct sk_buff *skb, struct net_device *dev) | |
1632 | { | |
1633 | int kmflags = in_interrupt() ? GFP_ATOMIC : GFP_KERNEL; | |
1634 | struct eth1394hdr *eth; | |
1635 | struct eth1394_priv *priv = netdev_priv(dev); | |
1636 | int proto; | |
1637 | unsigned long flags; | |
1638 | nodeid_t dest_node; | |
1639 | eth1394_tx_type tx_type; | |
1640 | int ret = 0; | |
1641 | unsigned int tx_len; | |
1642 | unsigned int max_payload; | |
1643 | u16 dg_size; | |
1644 | u16 dgl; | |
1645 | struct packet_task *ptask; | |
1646 | struct eth1394_node_ref *node; | |
1647 | struct eth1394_node_info *node_info = NULL; | |
1648 | ||
1649 | ptask = kmem_cache_alloc(packet_task_cache, kmflags); | |
1650 | if (ptask == NULL) { | |
1651 | ret = -ENOMEM; | |
1652 | goto fail; | |
1653 | } | |
1654 | ||
1655 | /* XXX Ignore this for now. Noticed that when MacOSX is the IRM, | |
1656 | * it does not set our validity bit. We need to compensate for | |
1657 | * that somewhere else, but not in eth1394. */ | |
1658 | #if 0 | |
1659 | if ((priv->host->csr.broadcast_channel & 0xc0000000) != 0xc0000000) { | |
1660 | ret = -EAGAIN; | |
1661 | goto fail; | |
1662 | } | |
1663 | #endif | |
1664 | ||
1665 | if ((skb = skb_share_check (skb, kmflags)) == NULL) { | |
1666 | ret = -ENOMEM; | |
1667 | goto fail; | |
1668 | } | |
1669 | ||
1670 | /* Get rid of the fake eth1394 header, but save a pointer */ | |
1671 | eth = (struct eth1394hdr*)skb->data; | |
1672 | skb_pull(skb, ETH1394_HLEN); | |
1673 | ||
1674 | proto = eth->h_proto; | |
1675 | dg_size = skb->len; | |
1676 | ||
1677 | /* Set the transmission type for the packet. ARP packets and IP | |
1678 | * broadcast packets are sent via GASP. */ | |
1679 | if (memcmp(eth->h_dest, dev->broadcast, ETH1394_ALEN) == 0 || | |
1680 | proto == __constant_htons(ETH_P_ARP) || | |
1681 | (proto == __constant_htons(ETH_P_IP) && | |
1682 | IN_MULTICAST(__constant_ntohl(skb->nh.iph->daddr)))) { | |
1683 | tx_type = ETH1394_GASP; | |
1684 | dest_node = LOCAL_BUS | ALL_NODES; | |
1685 | max_payload = priv->bc_maxpayload - ETHER1394_GASP_OVERHEAD; | |
1686 | BUG_ON(max_payload < (512 - ETHER1394_GASP_OVERHEAD)); | |
1687 | dgl = priv->bc_dgl; | |
1688 | if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF]) | |
1689 | priv->bc_dgl++; | |
1690 | } else { | |
1691 | node = eth1394_find_node_guid(&priv->ip_node_list, | |
1692 | be64_to_cpu(*(u64*)eth->h_dest)); | |
1693 | if (!node) { | |
1694 | ret = -EAGAIN; | |
1695 | goto fail; | |
1696 | } | |
1697 | node_info = (struct eth1394_node_info*)node->ud->device.driver_data; | |
1698 | if (node_info->fifo == ETHER1394_INVALID_ADDR) { | |
1699 | ret = -EAGAIN; | |
1700 | goto fail; | |
1701 | } | |
1702 | ||
1703 | dest_node = node->ud->ne->nodeid; | |
1704 | max_payload = node_info->maxpayload; | |
1705 | BUG_ON(max_payload < (512 - ETHER1394_GASP_OVERHEAD)); | |
1706 | ||
1707 | dgl = node_info->dgl; | |
1708 | if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF]) | |
1709 | node_info->dgl++; | |
1710 | tx_type = ETH1394_WRREQ; | |
1711 | } | |
1712 | ||
1713 | /* If this is an ARP packet, convert it */ | |
1714 | if (proto == __constant_htons (ETH_P_ARP)) | |
1715 | ether1394_arp_to_1394arp (skb, dev); | |
1716 | ||
1717 | ptask->hdr.words.word1 = 0; | |
1718 | ptask->hdr.words.word2 = 0; | |
1719 | ptask->hdr.words.word3 = 0; | |
1720 | ptask->hdr.words.word4 = 0; | |
1721 | ptask->skb = skb; | |
1722 | ptask->priv = priv; | |
1723 | ptask->tx_type = tx_type; | |
1724 | ||
1725 | if (tx_type != ETH1394_GASP) { | |
1726 | u64 addr; | |
1727 | ||
1728 | spin_lock_irqsave(&priv->lock, flags); | |
1729 | addr = node_info->fifo; | |
1730 | spin_unlock_irqrestore(&priv->lock, flags); | |
1731 | ||
1732 | ptask->addr = addr; | |
1733 | ptask->dest_node = dest_node; | |
1734 | } | |
1735 | ||
1736 | ptask->tx_type = tx_type; | |
1737 | ptask->max_payload = max_payload; | |
1738 | ptask->outstanding_pkts = ether1394_encapsulate_prep(max_payload, proto, | |
1739 | &ptask->hdr, dg_size, | |
1740 | dgl); | |
1741 | ||
1742 | /* Add the encapsulation header to the fragment */ | |
1743 | tx_len = ether1394_encapsulate(skb, max_payload, &ptask->hdr); | |
1744 | dev->trans_start = jiffies; | |
1745 | if (ether1394_send_packet(ptask, tx_len)) | |
1746 | goto fail; | |
1747 | ||
1748 | netif_wake_queue(dev); | |
1749 | return 0; | |
1750 | fail: | |
1751 | if (ptask) | |
1752 | kmem_cache_free(packet_task_cache, ptask); | |
1753 | ||
1754 | if (skb != NULL) | |
1755 | dev_kfree_skb(skb); | |
1756 | ||
1757 | spin_lock_irqsave (&priv->lock, flags); | |
1758 | priv->stats.tx_dropped++; | |
1759 | priv->stats.tx_errors++; | |
1760 | spin_unlock_irqrestore (&priv->lock, flags); | |
1761 | ||
1762 | if (netif_queue_stopped(dev)) | |
1763 | netif_wake_queue(dev); | |
1764 | ||
1765 | return 0; /* returning non-zero causes serious problems */ | |
1766 | } | |
1767 | ||
1768 | static void ether1394_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) | |
1769 | { | |
1770 | strcpy (info->driver, driver_name); | |
3ae3d0d4 | 1771 | strcpy (info->version, "$Rev: 1312 $"); |
1da177e4 LT |
1772 | /* FIXME XXX provide sane businfo */ |
1773 | strcpy (info->bus_info, "ieee1394"); | |
1774 | } | |
1775 | ||
1776 | static struct ethtool_ops ethtool_ops = { | |
1777 | .get_drvinfo = ether1394_get_drvinfo | |
1778 | }; | |
1779 | ||
1780 | static int __init ether1394_init_module (void) | |
1781 | { | |
1782 | packet_task_cache = kmem_cache_create("packet_task", sizeof(struct packet_task), | |
1783 | 0, 0, NULL, NULL); | |
1784 | ||
1785 | /* Register ourselves as a highlevel driver */ | |
1786 | hpsb_register_highlevel(ð1394_highlevel); | |
1787 | ||
1788 | return hpsb_register_protocol(ð1394_proto_driver); | |
1789 | } | |
1790 | ||
1791 | static void __exit ether1394_exit_module (void) | |
1792 | { | |
1793 | hpsb_unregister_protocol(ð1394_proto_driver); | |
1794 | hpsb_unregister_highlevel(ð1394_highlevel); | |
1795 | kmem_cache_destroy(packet_task_cache); | |
1796 | } | |
1797 | ||
1798 | module_init(ether1394_init_module); | |
1799 | module_exit(ether1394_exit_module); |