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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> | |
c20e3945 | 67 | #include <asm/unaligned.h> |
1da177e4 LT |
68 | #include <net/arp.h> |
69 | ||
de4394f1 | 70 | #include "config_roms.h" |
1da177e4 | 71 | #include "csr1212.h" |
de4394f1 SR |
72 | #include "eth1394.h" |
73 | #include "highlevel.h" | |
74 | #include "ieee1394.h" | |
1da177e4 | 75 | #include "ieee1394_core.h" |
de4394f1 | 76 | #include "ieee1394_hotplug.h" |
1da177e4 | 77 | #include "ieee1394_transactions.h" |
de4394f1 | 78 | #include "ieee1394_types.h" |
1da177e4 LT |
79 | #include "iso.h" |
80 | #include "nodemgr.h" | |
1da177e4 LT |
81 | |
82 | #define ETH1394_PRINT_G(level, fmt, args...) \ | |
83 | printk(level "%s: " fmt, driver_name, ## args) | |
84 | ||
85 | #define ETH1394_PRINT(level, dev_name, fmt, args...) \ | |
86 | printk(level "%s: %s: " fmt, driver_name, dev_name, ## args) | |
87 | ||
88 | #define DEBUG(fmt, args...) \ | |
89 | printk(KERN_ERR "%s:%s[%d]: " fmt "\n", driver_name, __FUNCTION__, __LINE__, ## args) | |
90 | #define TRACE() printk(KERN_ERR "%s:%s[%d] ---- TRACE\n", driver_name, __FUNCTION__, __LINE__) | |
91 | ||
1da177e4 LT |
92 | struct fragment_info { |
93 | struct list_head list; | |
94 | int offset; | |
95 | int len; | |
96 | }; | |
97 | ||
98 | struct partial_datagram { | |
99 | struct list_head list; | |
100 | u16 dgl; | |
101 | u16 dg_size; | |
102 | u16 ether_type; | |
103 | struct sk_buff *skb; | |
104 | char *pbuf; | |
105 | struct list_head frag_info; | |
106 | }; | |
107 | ||
108 | struct pdg_list { | |
109 | struct list_head list; /* partial datagram list per node */ | |
110 | unsigned int sz; /* partial datagram list size per node */ | |
111 | spinlock_t lock; /* partial datagram lock */ | |
112 | }; | |
113 | ||
114 | struct eth1394_host_info { | |
115 | struct hpsb_host *host; | |
116 | struct net_device *dev; | |
117 | }; | |
118 | ||
119 | struct eth1394_node_ref { | |
120 | struct unit_directory *ud; | |
121 | struct list_head list; | |
122 | }; | |
123 | ||
124 | struct eth1394_node_info { | |
125 | u16 maxpayload; /* Max payload */ | |
126 | u8 sspd; /* Max speed */ | |
127 | u64 fifo; /* FIFO address */ | |
128 | struct pdg_list pdg; /* partial RX datagram lists */ | |
129 | int dgl; /* Outgoing datagram label */ | |
130 | }; | |
131 | ||
132 | /* Our ieee1394 highlevel driver */ | |
133 | #define ETH1394_DRIVER_NAME "eth1394" | |
134 | static const char driver_name[] = ETH1394_DRIVER_NAME; | |
135 | ||
e18b890b | 136 | static struct kmem_cache *packet_task_cache; |
1da177e4 LT |
137 | |
138 | static struct hpsb_highlevel eth1394_highlevel; | |
139 | ||
140 | /* Use common.lf to determine header len */ | |
141 | static const int hdr_type_len[] = { | |
142 | sizeof (struct eth1394_uf_hdr), | |
143 | sizeof (struct eth1394_ff_hdr), | |
144 | sizeof (struct eth1394_sf_hdr), | |
145 | sizeof (struct eth1394_sf_hdr) | |
146 | }; | |
147 | ||
148 | /* Change this to IEEE1394_SPEED_S100 to make testing easier */ | |
149 | #define ETH1394_SPEED_DEF IEEE1394_SPEED_MAX | |
150 | ||
151 | /* For now, this needs to be 1500, so that XP works with us */ | |
152 | #define ETH1394_DATA_LEN ETH_DATA_LEN | |
153 | ||
154 | static const u16 eth1394_speedto_maxpayload[] = { | |
155 | /* S100, S200, S400, S800, S1600, S3200 */ | |
156 | 512, 1024, 2048, 4096, 4096, 4096 | |
157 | }; | |
158 | ||
159 | MODULE_AUTHOR("Ben Collins (bcollins@debian.org)"); | |
160 | MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)"); | |
161 | MODULE_LICENSE("GPL"); | |
162 | ||
163 | /* The max_partial_datagrams parameter is the maximum number of fragmented | |
164 | * datagrams per node that eth1394 will keep in memory. Providing an upper | |
165 | * bound allows us to limit the amount of memory that partial datagrams | |
166 | * consume in the event that some partial datagrams are never completed. | |
167 | */ | |
168 | static int max_partial_datagrams = 25; | |
169 | module_param(max_partial_datagrams, int, S_IRUGO | S_IWUSR); | |
170 | MODULE_PARM_DESC(max_partial_datagrams, | |
171 | "Maximum number of partially received fragmented datagrams " | |
172 | "(default = 25)."); | |
173 | ||
174 | ||
175 | static int ether1394_header(struct sk_buff *skb, struct net_device *dev, | |
176 | unsigned short type, void *daddr, void *saddr, | |
177 | unsigned len); | |
178 | static int ether1394_rebuild_header(struct sk_buff *skb); | |
179 | static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr); | |
180 | static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh); | |
181 | static void ether1394_header_cache_update(struct hh_cache *hh, | |
182 | struct net_device *dev, | |
183 | unsigned char * haddr); | |
184 | static int ether1394_mac_addr(struct net_device *dev, void *p); | |
185 | ||
186 | static void purge_partial_datagram(struct list_head *old); | |
187 | static int ether1394_tx(struct sk_buff *skb, struct net_device *dev); | |
188 | static void ether1394_iso(struct hpsb_iso *iso); | |
189 | ||
190 | static struct ethtool_ops ethtool_ops; | |
191 | ||
192 | static int ether1394_write(struct hpsb_host *host, int srcid, int destid, | |
193 | quadlet_t *data, u64 addr, size_t len, u16 flags); | |
194 | static void ether1394_add_host (struct hpsb_host *host); | |
195 | static void ether1394_remove_host (struct hpsb_host *host); | |
196 | static void ether1394_host_reset (struct hpsb_host *host); | |
197 | ||
198 | /* Function for incoming 1394 packets */ | |
199 | static struct hpsb_address_ops addr_ops = { | |
200 | .write = ether1394_write, | |
201 | }; | |
202 | ||
203 | /* Ieee1394 highlevel driver functions */ | |
204 | static struct hpsb_highlevel eth1394_highlevel = { | |
205 | .name = driver_name, | |
206 | .add_host = ether1394_add_host, | |
207 | .remove_host = ether1394_remove_host, | |
208 | .host_reset = ether1394_host_reset, | |
209 | }; | |
210 | ||
211 | ||
212 | /* This is called after an "ifup" */ | |
213 | static int ether1394_open (struct net_device *dev) | |
214 | { | |
215 | struct eth1394_priv *priv = netdev_priv(dev); | |
216 | int ret = 0; | |
217 | ||
218 | /* Something bad happened, don't even try */ | |
219 | if (priv->bc_state == ETHER1394_BC_ERROR) { | |
220 | /* we'll try again */ | |
221 | priv->iso = hpsb_iso_recv_init(priv->host, | |
3ae3d0d4 | 222 | ETHER1394_ISO_BUF_SIZE, |
1da177e4 LT |
223 | ETHER1394_GASP_BUFFERS, |
224 | priv->broadcast_channel, | |
225 | HPSB_ISO_DMA_PACKET_PER_BUFFER, | |
226 | 1, ether1394_iso); | |
227 | if (priv->iso == NULL) { | |
228 | ETH1394_PRINT(KERN_ERR, dev->name, | |
229 | "Could not allocate isochronous receive " | |
230 | "context for the broadcast channel\n"); | |
231 | priv->bc_state = ETHER1394_BC_ERROR; | |
232 | ret = -EAGAIN; | |
233 | } else { | |
234 | if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0) | |
235 | priv->bc_state = ETHER1394_BC_STOPPED; | |
236 | else | |
237 | priv->bc_state = ETHER1394_BC_RUNNING; | |
238 | } | |
239 | } | |
240 | ||
241 | if (ret) | |
242 | return ret; | |
243 | ||
244 | netif_start_queue (dev); | |
245 | return 0; | |
246 | } | |
247 | ||
248 | /* This is called after an "ifdown" */ | |
249 | static int ether1394_stop (struct net_device *dev) | |
250 | { | |
251 | netif_stop_queue (dev); | |
252 | return 0; | |
253 | } | |
254 | ||
255 | /* Return statistics to the caller */ | |
256 | static struct net_device_stats *ether1394_stats (struct net_device *dev) | |
257 | { | |
258 | return &(((struct eth1394_priv *)netdev_priv(dev))->stats); | |
259 | } | |
260 | ||
261 | /* What to do if we timeout. I think a host reset is probably in order, so | |
262 | * that's what we do. Should we increment the stat counters too? */ | |
263 | static void ether1394_tx_timeout (struct net_device *dev) | |
264 | { | |
265 | ETH1394_PRINT (KERN_ERR, dev->name, "Timeout, resetting host %s\n", | |
266 | ((struct eth1394_priv *)netdev_priv(dev))->host->driver->name); | |
267 | ||
268 | highlevel_host_reset (((struct eth1394_priv *)netdev_priv(dev))->host); | |
269 | ||
270 | netif_wake_queue (dev); | |
271 | } | |
272 | ||
273 | static int ether1394_change_mtu(struct net_device *dev, int new_mtu) | |
274 | { | |
275 | struct eth1394_priv *priv = netdev_priv(dev); | |
276 | ||
277 | if ((new_mtu < 68) || | |
278 | (new_mtu > min(ETH1394_DATA_LEN, | |
279 | (int)((1 << (priv->host->csr.max_rec + 1)) - | |
280 | (sizeof(union eth1394_hdr) + | |
281 | ETHER1394_GASP_OVERHEAD))))) | |
282 | return -EINVAL; | |
283 | dev->mtu = new_mtu; | |
284 | return 0; | |
285 | } | |
286 | ||
287 | static void purge_partial_datagram(struct list_head *old) | |
288 | { | |
289 | struct partial_datagram *pd = list_entry(old, struct partial_datagram, list); | |
290 | struct list_head *lh, *n; | |
291 | ||
292 | list_for_each_safe(lh, n, &pd->frag_info) { | |
293 | struct fragment_info *fi = list_entry(lh, struct fragment_info, list); | |
294 | list_del(lh); | |
295 | kfree(fi); | |
296 | } | |
297 | list_del(old); | |
298 | kfree_skb(pd->skb); | |
299 | kfree(pd); | |
300 | } | |
301 | ||
302 | /****************************************** | |
303 | * 1394 bus activity functions | |
304 | ******************************************/ | |
305 | ||
306 | static struct eth1394_node_ref *eth1394_find_node(struct list_head *inl, | |
307 | struct unit_directory *ud) | |
308 | { | |
309 | struct eth1394_node_ref *node; | |
310 | ||
311 | list_for_each_entry(node, inl, list) | |
312 | if (node->ud == ud) | |
313 | return node; | |
314 | ||
315 | return NULL; | |
316 | } | |
317 | ||
318 | static struct eth1394_node_ref *eth1394_find_node_guid(struct list_head *inl, | |
319 | u64 guid) | |
320 | { | |
321 | struct eth1394_node_ref *node; | |
322 | ||
323 | list_for_each_entry(node, inl, list) | |
324 | if (node->ud->ne->guid == guid) | |
325 | return node; | |
326 | ||
327 | return NULL; | |
328 | } | |
329 | ||
330 | static struct eth1394_node_ref *eth1394_find_node_nodeid(struct list_head *inl, | |
331 | nodeid_t nodeid) | |
332 | { | |
333 | struct eth1394_node_ref *node; | |
334 | list_for_each_entry(node, inl, list) { | |
335 | if (node->ud->ne->nodeid == nodeid) | |
336 | return node; | |
337 | } | |
338 | ||
339 | return NULL; | |
340 | } | |
341 | ||
342 | static int eth1394_probe(struct device *dev) | |
343 | { | |
344 | struct unit_directory *ud; | |
345 | struct eth1394_host_info *hi; | |
346 | struct eth1394_priv *priv; | |
347 | struct eth1394_node_ref *new_node; | |
348 | struct eth1394_node_info *node_info; | |
349 | ||
350 | ud = container_of(dev, struct unit_directory, device); | |
351 | ||
352 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
353 | if (!hi) | |
354 | return -ENOENT; | |
355 | ||
8551158a | 356 | new_node = kmalloc(sizeof(*new_node), |
1da177e4 LT |
357 | in_interrupt() ? GFP_ATOMIC : GFP_KERNEL); |
358 | if (!new_node) | |
359 | return -ENOMEM; | |
360 | ||
8551158a | 361 | node_info = kmalloc(sizeof(*node_info), |
1da177e4 LT |
362 | in_interrupt() ? GFP_ATOMIC : GFP_KERNEL); |
363 | if (!node_info) { | |
364 | kfree(new_node); | |
365 | return -ENOMEM; | |
366 | } | |
367 | ||
368 | spin_lock_init(&node_info->pdg.lock); | |
369 | INIT_LIST_HEAD(&node_info->pdg.list); | |
370 | node_info->pdg.sz = 0; | |
6737231e | 371 | node_info->fifo = CSR1212_INVALID_ADDR_SPACE; |
1da177e4 LT |
372 | |
373 | ud->device.driver_data = node_info; | |
374 | new_node->ud = ud; | |
375 | ||
376 | priv = netdev_priv(hi->dev); | |
377 | list_add_tail(&new_node->list, &priv->ip_node_list); | |
378 | ||
379 | return 0; | |
380 | } | |
381 | ||
382 | static int eth1394_remove(struct device *dev) | |
383 | { | |
384 | struct unit_directory *ud; | |
385 | struct eth1394_host_info *hi; | |
386 | struct eth1394_priv *priv; | |
387 | struct eth1394_node_ref *old_node; | |
388 | struct eth1394_node_info *node_info; | |
389 | struct list_head *lh, *n; | |
390 | unsigned long flags; | |
391 | ||
392 | ud = container_of(dev, struct unit_directory, device); | |
393 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
394 | if (!hi) | |
395 | return -ENOENT; | |
396 | ||
397 | priv = netdev_priv(hi->dev); | |
398 | ||
399 | old_node = eth1394_find_node(&priv->ip_node_list, ud); | |
400 | ||
401 | if (old_node) { | |
402 | list_del(&old_node->list); | |
403 | kfree(old_node); | |
404 | ||
405 | node_info = (struct eth1394_node_info*)ud->device.driver_data; | |
406 | ||
407 | spin_lock_irqsave(&node_info->pdg.lock, flags); | |
408 | /* The partial datagram list should be empty, but we'll just | |
409 | * make sure anyway... */ | |
410 | list_for_each_safe(lh, n, &node_info->pdg.list) { | |
411 | purge_partial_datagram(lh); | |
412 | } | |
413 | spin_unlock_irqrestore(&node_info->pdg.lock, flags); | |
414 | ||
415 | kfree(node_info); | |
416 | ud->device.driver_data = NULL; | |
417 | } | |
418 | return 0; | |
419 | } | |
420 | ||
421 | static int eth1394_update(struct unit_directory *ud) | |
422 | { | |
423 | struct eth1394_host_info *hi; | |
424 | struct eth1394_priv *priv; | |
425 | struct eth1394_node_ref *node; | |
426 | struct eth1394_node_info *node_info; | |
427 | ||
428 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
429 | if (!hi) | |
430 | return -ENOENT; | |
431 | ||
432 | priv = netdev_priv(hi->dev); | |
433 | ||
434 | node = eth1394_find_node(&priv->ip_node_list, ud); | |
435 | ||
436 | if (!node) { | |
8551158a | 437 | node = kmalloc(sizeof(*node), |
1da177e4 LT |
438 | in_interrupt() ? GFP_ATOMIC : GFP_KERNEL); |
439 | if (!node) | |
440 | return -ENOMEM; | |
441 | ||
8551158a | 442 | node_info = kmalloc(sizeof(*node_info), |
1da177e4 LT |
443 | in_interrupt() ? GFP_ATOMIC : GFP_KERNEL); |
444 | if (!node_info) { | |
445 | kfree(node); | |
446 | return -ENOMEM; | |
447 | } | |
448 | ||
449 | spin_lock_init(&node_info->pdg.lock); | |
450 | INIT_LIST_HEAD(&node_info->pdg.list); | |
451 | node_info->pdg.sz = 0; | |
452 | ||
453 | ud->device.driver_data = node_info; | |
454 | node->ud = ud; | |
455 | ||
456 | priv = netdev_priv(hi->dev); | |
457 | list_add_tail(&node->list, &priv->ip_node_list); | |
458 | } | |
459 | ||
460 | return 0; | |
461 | } | |
462 | ||
463 | ||
464 | static struct ieee1394_device_id eth1394_id_table[] = { | |
465 | { | |
466 | .match_flags = (IEEE1394_MATCH_SPECIFIER_ID | | |
467 | IEEE1394_MATCH_VERSION), | |
468 | .specifier_id = ETHER1394_GASP_SPECIFIER_ID, | |
469 | .version = ETHER1394_GASP_VERSION, | |
470 | }, | |
471 | {} | |
472 | }; | |
473 | ||
474 | MODULE_DEVICE_TABLE(ieee1394, eth1394_id_table); | |
475 | ||
476 | static struct hpsb_protocol_driver eth1394_proto_driver = { | |
477 | .name = "IPv4 over 1394 Driver", | |
478 | .id_table = eth1394_id_table, | |
479 | .update = eth1394_update, | |
480 | .driver = { | |
481 | .name = ETH1394_DRIVER_NAME, | |
482 | .bus = &ieee1394_bus_type, | |
483 | .probe = eth1394_probe, | |
484 | .remove = eth1394_remove, | |
485 | }, | |
486 | }; | |
487 | ||
488 | ||
489 | static void ether1394_reset_priv (struct net_device *dev, int set_mtu) | |
490 | { | |
491 | unsigned long flags; | |
492 | int i; | |
493 | struct eth1394_priv *priv = netdev_priv(dev); | |
494 | struct hpsb_host *host = priv->host; | |
c20e3945 | 495 | u64 guid = get_unaligned((u64*)&(host->csr.rom->bus_info_data[3])); |
1da177e4 LT |
496 | u16 maxpayload = 1 << (host->csr.max_rec + 1); |
497 | int max_speed = IEEE1394_SPEED_MAX; | |
498 | ||
499 | spin_lock_irqsave (&priv->lock, flags); | |
500 | ||
501 | memset(priv->ud_list, 0, sizeof(struct node_entry*) * ALL_NODES); | |
502 | priv->bc_maxpayload = 512; | |
503 | ||
504 | /* Determine speed limit */ | |
505 | for (i = 0; i < host->node_count; i++) | |
647dcb5f BC |
506 | if (max_speed > host->speed[i]) |
507 | max_speed = host->speed[i]; | |
1da177e4 LT |
508 | priv->bc_sspd = max_speed; |
509 | ||
510 | /* We'll use our maxpayload as the default mtu */ | |
511 | if (set_mtu) { | |
512 | dev->mtu = min(ETH1394_DATA_LEN, | |
513 | (int)(maxpayload - | |
514 | (sizeof(union eth1394_hdr) + | |
515 | ETHER1394_GASP_OVERHEAD))); | |
516 | ||
517 | /* Set our hardware address while we're at it */ | |
c20e3945 DM |
518 | memcpy(dev->dev_addr, &guid, sizeof(u64)); |
519 | memset(dev->broadcast, 0xff, sizeof(u64)); | |
1da177e4 LT |
520 | } |
521 | ||
522 | spin_unlock_irqrestore (&priv->lock, flags); | |
523 | } | |
524 | ||
525 | /* This function is called right before register_netdev */ | |
526 | static void ether1394_init_dev (struct net_device *dev) | |
527 | { | |
528 | /* Our functions */ | |
529 | dev->open = ether1394_open; | |
530 | dev->stop = ether1394_stop; | |
531 | dev->hard_start_xmit = ether1394_tx; | |
532 | dev->get_stats = ether1394_stats; | |
533 | dev->tx_timeout = ether1394_tx_timeout; | |
534 | dev->change_mtu = ether1394_change_mtu; | |
535 | ||
536 | dev->hard_header = ether1394_header; | |
537 | dev->rebuild_header = ether1394_rebuild_header; | |
538 | dev->hard_header_cache = ether1394_header_cache; | |
539 | dev->header_cache_update= ether1394_header_cache_update; | |
540 | dev->hard_header_parse = ether1394_header_parse; | |
541 | dev->set_mac_address = ether1394_mac_addr; | |
542 | SET_ETHTOOL_OPS(dev, ðtool_ops); | |
543 | ||
544 | /* Some constants */ | |
545 | dev->watchdog_timeo = ETHER1394_TIMEOUT; | |
546 | dev->flags = IFF_BROADCAST | IFF_MULTICAST; | |
547 | dev->features = NETIF_F_HIGHDMA; | |
548 | dev->addr_len = ETH1394_ALEN; | |
549 | dev->hard_header_len = ETH1394_HLEN; | |
550 | dev->type = ARPHRD_IEEE1394; | |
551 | ||
552 | ether1394_reset_priv (dev, 1); | |
553 | } | |
554 | ||
555 | /* | |
556 | * This function is called every time a card is found. It is generally called | |
557 | * when the module is installed. This is where we add all of our ethernet | |
558 | * devices. One for each host. | |
559 | */ | |
560 | static void ether1394_add_host (struct hpsb_host *host) | |
561 | { | |
562 | struct eth1394_host_info *hi = NULL; | |
563 | struct net_device *dev = NULL; | |
564 | struct eth1394_priv *priv; | |
1da177e4 LT |
565 | u64 fifo_addr; |
566 | ||
567 | if (!(host->config_roms & HPSB_CONFIG_ROM_ENTRY_IP1394)) | |
568 | return; | |
569 | ||
6737231e BC |
570 | fifo_addr = hpsb_allocate_and_register_addrspace( |
571 | ð1394_highlevel, host, &addr_ops, | |
572 | ETHER1394_REGION_ADDR_LEN, ETHER1394_REGION_ADDR_LEN, | |
573 | CSR1212_INVALID_ADDR_SPACE, CSR1212_INVALID_ADDR_SPACE); | |
574 | if (fifo_addr == CSR1212_INVALID_ADDR_SPACE) | |
1da177e4 LT |
575 | goto out; |
576 | ||
1da177e4 LT |
577 | /* We should really have our own alloc_hpsbdev() function in |
578 | * net_init.c instead of calling the one for ethernet then hijacking | |
579 | * it for ourselves. That way we'd be a real networking device. */ | |
580 | dev = alloc_etherdev(sizeof (struct eth1394_priv)); | |
581 | ||
582 | if (dev == NULL) { | |
583 | ETH1394_PRINT_G (KERN_ERR, "Out of memory trying to allocate " | |
584 | "etherdevice for IEEE 1394 device %s-%d\n", | |
585 | host->driver->name, host->id); | |
586 | goto out; | |
587 | } | |
588 | ||
589 | SET_MODULE_OWNER(dev); | |
590 | SET_NETDEV_DEV(dev, &host->device); | |
591 | ||
592 | priv = netdev_priv(dev); | |
593 | ||
594 | INIT_LIST_HEAD(&priv->ip_node_list); | |
595 | ||
596 | spin_lock_init(&priv->lock); | |
597 | priv->host = host; | |
598 | priv->local_fifo = fifo_addr; | |
599 | ||
600 | hi = hpsb_create_hostinfo(ð1394_highlevel, host, sizeof(*hi)); | |
601 | ||
602 | if (hi == NULL) { | |
603 | ETH1394_PRINT_G (KERN_ERR, "Out of memory trying to create " | |
604 | "hostinfo for IEEE 1394 device %s-%d\n", | |
605 | host->driver->name, host->id); | |
606 | goto out; | |
607 | } | |
608 | ||
609 | ether1394_init_dev(dev); | |
610 | ||
611 | if (register_netdev (dev)) { | |
612 | ETH1394_PRINT (KERN_ERR, dev->name, "Error registering network driver\n"); | |
613 | goto out; | |
614 | } | |
615 | ||
616 | ETH1394_PRINT (KERN_INFO, dev->name, "IEEE-1394 IPv4 over 1394 Ethernet (fw-host%d)\n", | |
617 | host->id); | |
618 | ||
619 | hi->host = host; | |
620 | hi->dev = dev; | |
621 | ||
622 | /* Ignore validity in hopes that it will be set in the future. It'll | |
623 | * be checked when the eth device is opened. */ | |
624 | priv->broadcast_channel = host->csr.broadcast_channel & 0x3f; | |
625 | ||
3ae3d0d4 JM |
626 | priv->iso = hpsb_iso_recv_init(host, |
627 | ETHER1394_ISO_BUF_SIZE, | |
1da177e4 LT |
628 | ETHER1394_GASP_BUFFERS, |
629 | priv->broadcast_channel, | |
630 | HPSB_ISO_DMA_PACKET_PER_BUFFER, | |
631 | 1, ether1394_iso); | |
632 | if (priv->iso == NULL) { | |
633 | ETH1394_PRINT(KERN_ERR, dev->name, | |
634 | "Could not allocate isochronous receive context " | |
635 | "for the broadcast channel\n"); | |
636 | priv->bc_state = ETHER1394_BC_ERROR; | |
637 | } else { | |
638 | if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0) | |
639 | priv->bc_state = ETHER1394_BC_STOPPED; | |
640 | else | |
641 | priv->bc_state = ETHER1394_BC_RUNNING; | |
642 | } | |
643 | ||
644 | return; | |
645 | ||
646 | out: | |
647 | if (dev != NULL) | |
648 | free_netdev(dev); | |
649 | if (hi) | |
650 | hpsb_destroy_hostinfo(ð1394_highlevel, host); | |
651 | ||
652 | return; | |
653 | } | |
654 | ||
655 | /* Remove a card from our list */ | |
656 | static void ether1394_remove_host (struct hpsb_host *host) | |
657 | { | |
658 | struct eth1394_host_info *hi; | |
659 | ||
660 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
661 | if (hi != NULL) { | |
662 | struct eth1394_priv *priv = netdev_priv(hi->dev); | |
663 | ||
664 | hpsb_unregister_addrspace(ð1394_highlevel, host, | |
665 | priv->local_fifo); | |
666 | ||
667 | if (priv->iso != NULL) | |
668 | hpsb_iso_shutdown(priv->iso); | |
669 | ||
670 | if (hi->dev) { | |
671 | unregister_netdev (hi->dev); | |
672 | free_netdev(hi->dev); | |
673 | } | |
674 | } | |
675 | ||
676 | return; | |
677 | } | |
678 | ||
679 | /* A reset has just arisen */ | |
680 | static void ether1394_host_reset (struct hpsb_host *host) | |
681 | { | |
682 | struct eth1394_host_info *hi; | |
683 | struct eth1394_priv *priv; | |
684 | struct net_device *dev; | |
685 | struct list_head *lh, *n; | |
686 | struct eth1394_node_ref *node; | |
687 | struct eth1394_node_info *node_info; | |
688 | unsigned long flags; | |
689 | ||
690 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
691 | ||
692 | /* This can happen for hosts that we don't use */ | |
693 | if (hi == NULL) | |
694 | return; | |
695 | ||
696 | dev = hi->dev; | |
1934b8b6 | 697 | priv = (struct eth1394_priv *)netdev_priv(dev); |
1da177e4 LT |
698 | |
699 | /* Reset our private host data, but not our mtu */ | |
700 | netif_stop_queue (dev); | |
701 | ether1394_reset_priv (dev, 0); | |
702 | ||
703 | list_for_each_entry(node, &priv->ip_node_list, list) { | |
704 | node_info = (struct eth1394_node_info*)node->ud->device.driver_data; | |
705 | ||
706 | spin_lock_irqsave(&node_info->pdg.lock, flags); | |
707 | ||
708 | list_for_each_safe(lh, n, &node_info->pdg.list) { | |
709 | purge_partial_datagram(lh); | |
710 | } | |
711 | ||
712 | INIT_LIST_HEAD(&(node_info->pdg.list)); | |
713 | node_info->pdg.sz = 0; | |
714 | ||
715 | spin_unlock_irqrestore(&node_info->pdg.lock, flags); | |
716 | } | |
717 | ||
718 | netif_wake_queue (dev); | |
719 | } | |
720 | ||
721 | /****************************************** | |
722 | * HW Header net device functions | |
723 | ******************************************/ | |
724 | /* These functions have been adapted from net/ethernet/eth.c */ | |
725 | ||
726 | ||
727 | /* Create a fake MAC header for an arbitrary protocol layer. | |
728 | * saddr=NULL means use device source address | |
729 | * daddr=NULL means leave destination address (eg unresolved arp). */ | |
730 | static int ether1394_header(struct sk_buff *skb, struct net_device *dev, | |
731 | unsigned short type, void *daddr, void *saddr, | |
732 | unsigned len) | |
733 | { | |
734 | struct eth1394hdr *eth = (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN); | |
735 | ||
736 | eth->h_proto = htons(type); | |
737 | ||
738 | if (dev->flags & (IFF_LOOPBACK|IFF_NOARP)) { | |
739 | memset(eth->h_dest, 0, dev->addr_len); | |
740 | return(dev->hard_header_len); | |
741 | } | |
742 | ||
743 | if (daddr) { | |
744 | memcpy(eth->h_dest,daddr,dev->addr_len); | |
745 | return dev->hard_header_len; | |
746 | } | |
747 | ||
748 | return -dev->hard_header_len; | |
749 | ||
750 | } | |
751 | ||
752 | ||
753 | /* Rebuild the faked MAC header. This is called after an ARP | |
754 | * (or in future other address resolution) has completed on this | |
755 | * sk_buff. We now let ARP fill in the other fields. | |
756 | * | |
757 | * This routine CANNOT use cached dst->neigh! | |
758 | * Really, it is used only when dst->neigh is wrong. | |
759 | */ | |
760 | static int ether1394_rebuild_header(struct sk_buff *skb) | |
761 | { | |
762 | struct eth1394hdr *eth = (struct eth1394hdr *)skb->data; | |
763 | struct net_device *dev = skb->dev; | |
764 | ||
765 | switch (eth->h_proto) { | |
766 | ||
767 | #ifdef CONFIG_INET | |
768 | case __constant_htons(ETH_P_IP): | |
769 | return arp_find((unsigned char*)ð->h_dest, skb); | |
770 | #endif | |
771 | default: | |
772 | ETH1394_PRINT(KERN_DEBUG, dev->name, | |
773 | "unable to resolve type %04x addresses.\n", | |
7136b807 | 774 | ntohs(eth->h_proto)); |
1da177e4 LT |
775 | break; |
776 | } | |
777 | ||
778 | return 0; | |
779 | } | |
780 | ||
781 | static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr) | |
782 | { | |
783 | struct net_device *dev = skb->dev; | |
784 | memcpy(haddr, dev->dev_addr, ETH1394_ALEN); | |
785 | return ETH1394_ALEN; | |
786 | } | |
787 | ||
788 | ||
789 | static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh) | |
790 | { | |
791 | unsigned short type = hh->hh_type; | |
792 | struct eth1394hdr *eth = (struct eth1394hdr*)(((u8*)hh->hh_data) + | |
793 | (16 - ETH1394_HLEN)); | |
794 | struct net_device *dev = neigh->dev; | |
795 | ||
7136b807 | 796 | if (type == htons(ETH_P_802_3)) |
1da177e4 | 797 | return -1; |
1da177e4 LT |
798 | |
799 | eth->h_proto = type; | |
800 | memcpy(eth->h_dest, neigh->ha, dev->addr_len); | |
801 | ||
802 | hh->hh_len = ETH1394_HLEN; | |
803 | return 0; | |
804 | } | |
805 | ||
806 | /* Called by Address Resolution module to notify changes in address. */ | |
807 | static void ether1394_header_cache_update(struct hh_cache *hh, | |
808 | struct net_device *dev, | |
809 | unsigned char * haddr) | |
810 | { | |
811 | memcpy(((u8*)hh->hh_data) + (16 - ETH1394_HLEN), haddr, dev->addr_len); | |
812 | } | |
813 | ||
814 | static int ether1394_mac_addr(struct net_device *dev, void *p) | |
815 | { | |
816 | if (netif_running(dev)) | |
817 | return -EBUSY; | |
818 | ||
819 | /* Not going to allow setting the MAC address, we really need to use | |
820 | * the real one supplied by the hardware */ | |
821 | return -EINVAL; | |
822 | } | |
823 | ||
824 | ||
825 | ||
826 | /****************************************** | |
827 | * Datagram reception code | |
828 | ******************************************/ | |
829 | ||
830 | /* Copied from net/ethernet/eth.c */ | |
831 | static inline u16 ether1394_type_trans(struct sk_buff *skb, | |
832 | struct net_device *dev) | |
833 | { | |
834 | struct eth1394hdr *eth; | |
835 | unsigned char *rawp; | |
836 | ||
837 | skb->mac.raw = skb->data; | |
838 | skb_pull (skb, ETH1394_HLEN); | |
839 | eth = eth1394_hdr(skb); | |
840 | ||
841 | if (*eth->h_dest & 1) { | |
842 | if (memcmp(eth->h_dest, dev->broadcast, dev->addr_len)==0) | |
843 | skb->pkt_type = PACKET_BROADCAST; | |
844 | #if 0 | |
845 | else | |
846 | skb->pkt_type = PACKET_MULTICAST; | |
847 | #endif | |
848 | } else { | |
849 | if (memcmp(eth->h_dest, dev->dev_addr, dev->addr_len)) | |
850 | skb->pkt_type = PACKET_OTHERHOST; | |
851 | } | |
852 | ||
853 | if (ntohs (eth->h_proto) >= 1536) | |
854 | return eth->h_proto; | |
855 | ||
856 | rawp = skb->data; | |
857 | ||
858 | if (*(unsigned short *)rawp == 0xFFFF) | |
859 | return htons (ETH_P_802_3); | |
860 | ||
861 | return htons (ETH_P_802_2); | |
862 | } | |
863 | ||
864 | /* Parse an encapsulated IP1394 header into an ethernet frame packet. | |
865 | * We also perform ARP translation here, if need be. */ | |
866 | static inline u16 ether1394_parse_encap(struct sk_buff *skb, | |
867 | struct net_device *dev, | |
868 | nodeid_t srcid, nodeid_t destid, | |
869 | u16 ether_type) | |
870 | { | |
871 | struct eth1394_priv *priv = netdev_priv(dev); | |
872 | u64 dest_hw; | |
873 | unsigned short ret = 0; | |
874 | ||
875 | /* Setup our hw addresses. We use these to build the | |
876 | * ethernet header. */ | |
877 | if (destid == (LOCAL_BUS | ALL_NODES)) | |
878 | dest_hw = ~0ULL; /* broadcast */ | |
879 | else | |
880 | dest_hw = cpu_to_be64((((u64)priv->host->csr.guid_hi) << 32) | | |
881 | priv->host->csr.guid_lo); | |
882 | ||
883 | /* If this is an ARP packet, convert it. First, we want to make | |
884 | * use of some of the fields, since they tell us a little bit | |
885 | * about the sending machine. */ | |
7136b807 | 886 | if (ether_type == htons(ETH_P_ARP)) { |
1da177e4 LT |
887 | struct eth1394_arp *arp1394 = (struct eth1394_arp*)skb->data; |
888 | struct arphdr *arp = (struct arphdr *)skb->data; | |
889 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
890 | u64 fifo_addr = (u64)ntohs(arp1394->fifo_hi) << 32 | | |
891 | ntohl(arp1394->fifo_lo); | |
892 | u8 max_rec = min(priv->host->csr.max_rec, | |
893 | (u8)(arp1394->max_rec)); | |
894 | int sspd = arp1394->sspd; | |
895 | u16 maxpayload; | |
896 | struct eth1394_node_ref *node; | |
897 | struct eth1394_node_info *node_info; | |
c20e3945 | 898 | __be64 guid; |
1da177e4 LT |
899 | |
900 | /* Sanity check. MacOSX seems to be sending us 131 in this | |
901 | * field (atleast on my Panther G5). Not sure why. */ | |
902 | if (sspd > 5 || sspd < 0) | |
903 | sspd = 0; | |
904 | ||
905 | maxpayload = min(eth1394_speedto_maxpayload[sspd], (u16)(1 << (max_rec + 1))); | |
906 | ||
c20e3945 | 907 | guid = get_unaligned(&arp1394->s_uniq_id); |
1da177e4 | 908 | node = eth1394_find_node_guid(&priv->ip_node_list, |
c20e3945 | 909 | be64_to_cpu(guid)); |
1da177e4 LT |
910 | if (!node) { |
911 | return 0; | |
912 | } | |
913 | ||
914 | node_info = (struct eth1394_node_info*)node->ud->device.driver_data; | |
915 | ||
916 | /* Update our speed/payload/fifo_offset table */ | |
917 | node_info->maxpayload = maxpayload; | |
918 | node_info->sspd = sspd; | |
919 | node_info->fifo = fifo_addr; | |
920 | ||
921 | /* Now that we're done with the 1394 specific stuff, we'll | |
922 | * need to alter some of the data. Believe it or not, all | |
923 | * that needs to be done is sender_IP_address needs to be | |
924 | * moved, the destination hardware address get stuffed | |
925 | * in and the hardware address length set to 8. | |
926 | * | |
927 | * IMPORTANT: The code below overwrites 1394 specific data | |
928 | * needed above so keep the munging of the data for the | |
929 | * higher level IP stack last. */ | |
930 | ||
931 | arp->ar_hln = 8; | |
932 | arp_ptr += arp->ar_hln; /* skip over sender unique id */ | |
933 | *(u32*)arp_ptr = arp1394->sip; /* move sender IP addr */ | |
934 | arp_ptr += arp->ar_pln; /* skip over sender IP addr */ | |
935 | ||
02f4213f | 936 | if (arp->ar_op == htons(ARPOP_REQUEST)) |
c20e3945 | 937 | memset(arp_ptr, 0, sizeof(u64)); |
1da177e4 | 938 | else |
c20e3945 | 939 | memcpy(arp_ptr, dev->dev_addr, sizeof(u64)); |
1da177e4 LT |
940 | } |
941 | ||
942 | /* Now add the ethernet header. */ | |
7136b807 BC |
943 | if (dev->hard_header(skb, dev, ntohs(ether_type), &dest_hw, NULL, |
944 | skb->len) >= 0) | |
1da177e4 LT |
945 | ret = ether1394_type_trans(skb, dev); |
946 | ||
947 | return ret; | |
948 | } | |
949 | ||
950 | static inline int fragment_overlap(struct list_head *frag_list, int offset, int len) | |
951 | { | |
952 | struct fragment_info *fi; | |
953 | ||
954 | list_for_each_entry(fi, frag_list, list) { | |
955 | if ( ! ((offset > (fi->offset + fi->len - 1)) || | |
956 | ((offset + len - 1) < fi->offset))) | |
957 | return 1; | |
958 | } | |
959 | return 0; | |
960 | } | |
961 | ||
962 | static inline struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl) | |
963 | { | |
964 | struct partial_datagram *pd; | |
965 | ||
966 | list_for_each_entry(pd, pdgl, list) { | |
967 | if (pd->dgl == dgl) | |
968 | return &pd->list; | |
969 | } | |
970 | return NULL; | |
971 | } | |
972 | ||
973 | /* Assumes that new fragment does not overlap any existing fragments */ | |
974 | static inline int new_fragment(struct list_head *frag_info, int offset, int len) | |
975 | { | |
976 | struct list_head *lh; | |
977 | struct fragment_info *fi, *fi2, *new; | |
978 | ||
979 | list_for_each(lh, frag_info) { | |
980 | fi = list_entry(lh, struct fragment_info, list); | |
981 | if ((fi->offset + fi->len) == offset) { | |
982 | /* The new fragment can be tacked on to the end */ | |
983 | fi->len += len; | |
984 | /* Did the new fragment plug a hole? */ | |
985 | fi2 = list_entry(lh->next, struct fragment_info, list); | |
986 | if ((fi->offset + fi->len) == fi2->offset) { | |
987 | /* glue fragments together */ | |
988 | fi->len += fi2->len; | |
989 | list_del(lh->next); | |
990 | kfree(fi2); | |
991 | } | |
992 | return 0; | |
993 | } else if ((offset + len) == fi->offset) { | |
994 | /* The new fragment can be tacked on to the beginning */ | |
995 | fi->offset = offset; | |
996 | fi->len += len; | |
997 | /* Did the new fragment plug a hole? */ | |
998 | fi2 = list_entry(lh->prev, struct fragment_info, list); | |
999 | if ((fi2->offset + fi2->len) == fi->offset) { | |
1000 | /* glue fragments together */ | |
1001 | fi2->len += fi->len; | |
1002 | list_del(lh); | |
1003 | kfree(fi); | |
1004 | } | |
1005 | return 0; | |
1006 | } else if (offset > (fi->offset + fi->len)) { | |
1007 | break; | |
1008 | } else if ((offset + len) < fi->offset) { | |
1009 | lh = lh->prev; | |
1010 | break; | |
1011 | } | |
1012 | } | |
1013 | ||
8551158a | 1014 | new = kmalloc(sizeof(*new), GFP_ATOMIC); |
1da177e4 LT |
1015 | if (!new) |
1016 | return -ENOMEM; | |
1017 | ||
1018 | new->offset = offset; | |
1019 | new->len = len; | |
1020 | ||
1021 | list_add(&new->list, lh); | |
1022 | ||
1023 | return 0; | |
1024 | } | |
1025 | ||
1026 | static inline int new_partial_datagram(struct net_device *dev, | |
1027 | struct list_head *pdgl, int dgl, | |
1028 | int dg_size, char *frag_buf, | |
1029 | int frag_off, int frag_len) | |
1030 | { | |
1031 | struct partial_datagram *new; | |
1032 | ||
8551158a | 1033 | new = kmalloc(sizeof(*new), GFP_ATOMIC); |
1da177e4 LT |
1034 | if (!new) |
1035 | return -ENOMEM; | |
1036 | ||
1037 | INIT_LIST_HEAD(&new->frag_info); | |
1038 | ||
1039 | if (new_fragment(&new->frag_info, frag_off, frag_len) < 0) { | |
1040 | kfree(new); | |
1041 | return -ENOMEM; | |
1042 | } | |
1043 | ||
1044 | new->dgl = dgl; | |
1045 | new->dg_size = dg_size; | |
1046 | ||
1047 | new->skb = dev_alloc_skb(dg_size + dev->hard_header_len + 15); | |
1048 | if (!new->skb) { | |
1049 | struct fragment_info *fi = list_entry(new->frag_info.next, | |
1050 | struct fragment_info, | |
1051 | list); | |
1052 | kfree(fi); | |
1053 | kfree(new); | |
1054 | return -ENOMEM; | |
1055 | } | |
1056 | ||
1057 | skb_reserve(new->skb, (dev->hard_header_len + 15) & ~15); | |
1058 | new->pbuf = skb_put(new->skb, dg_size); | |
1059 | memcpy(new->pbuf + frag_off, frag_buf, frag_len); | |
1060 | ||
1061 | list_add(&new->list, pdgl); | |
1062 | ||
1063 | return 0; | |
1064 | } | |
1065 | ||
1066 | static inline int update_partial_datagram(struct list_head *pdgl, struct list_head *lh, | |
1067 | char *frag_buf, int frag_off, int frag_len) | |
1068 | { | |
1069 | struct partial_datagram *pd = list_entry(lh, struct partial_datagram, list); | |
1070 | ||
1071 | if (new_fragment(&pd->frag_info, frag_off, frag_len) < 0) { | |
1072 | return -ENOMEM; | |
1073 | } | |
1074 | ||
1075 | memcpy(pd->pbuf + frag_off, frag_buf, frag_len); | |
1076 | ||
1077 | /* Move list entry to beginnig of list so that oldest partial | |
1078 | * datagrams percolate to the end of the list */ | |
179e0917 | 1079 | list_move(lh, pdgl); |
1da177e4 LT |
1080 | |
1081 | return 0; | |
1082 | } | |
1083 | ||
1084 | static inline int is_datagram_complete(struct list_head *lh, int dg_size) | |
1085 | { | |
1086 | struct partial_datagram *pd = list_entry(lh, struct partial_datagram, list); | |
1087 | struct fragment_info *fi = list_entry(pd->frag_info.next, | |
1088 | struct fragment_info, list); | |
1089 | ||
1090 | return (fi->len == dg_size); | |
1091 | } | |
1092 | ||
1093 | /* Packet reception. We convert the IP1394 encapsulation header to an | |
1094 | * ethernet header, and fill it with some of our other fields. This is | |
1095 | * an incoming packet from the 1394 bus. */ | |
1096 | static int ether1394_data_handler(struct net_device *dev, int srcid, int destid, | |
1097 | char *buf, int len) | |
1098 | { | |
1099 | struct sk_buff *skb; | |
1100 | unsigned long flags; | |
1101 | struct eth1394_priv *priv = netdev_priv(dev); | |
1102 | union eth1394_hdr *hdr = (union eth1394_hdr *)buf; | |
1103 | u16 ether_type = 0; /* initialized to clear warning */ | |
1104 | int hdr_len; | |
1105 | struct unit_directory *ud = priv->ud_list[NODEID_TO_NODE(srcid)]; | |
1106 | struct eth1394_node_info *node_info; | |
1107 | ||
1108 | if (!ud) { | |
1109 | struct eth1394_node_ref *node; | |
1110 | node = eth1394_find_node_nodeid(&priv->ip_node_list, srcid); | |
1111 | if (!node) { | |
1112 | HPSB_PRINT(KERN_ERR, "ether1394 rx: sender nodeid " | |
1113 | "lookup failure: " NODE_BUS_FMT, | |
1114 | NODE_BUS_ARGS(priv->host, srcid)); | |
1115 | priv->stats.rx_dropped++; | |
1116 | return -1; | |
1117 | } | |
1118 | ud = node->ud; | |
1119 | ||
1120 | priv->ud_list[NODEID_TO_NODE(srcid)] = ud; | |
1121 | } | |
1122 | ||
1123 | node_info = (struct eth1394_node_info*)ud->device.driver_data; | |
1124 | ||
1125 | /* First, did we receive a fragmented or unfragmented datagram? */ | |
1126 | hdr->words.word1 = ntohs(hdr->words.word1); | |
1127 | ||
1128 | hdr_len = hdr_type_len[hdr->common.lf]; | |
1129 | ||
1130 | if (hdr->common.lf == ETH1394_HDR_LF_UF) { | |
1131 | /* An unfragmented datagram has been received by the ieee1394 | |
1132 | * bus. Build an skbuff around it so we can pass it to the | |
1133 | * high level network layer. */ | |
1134 | ||
1135 | skb = dev_alloc_skb(len + dev->hard_header_len + 15); | |
1136 | if (!skb) { | |
1137 | HPSB_PRINT (KERN_ERR, "ether1394 rx: low on mem\n"); | |
1138 | priv->stats.rx_dropped++; | |
1139 | return -1; | |
1140 | } | |
1141 | skb_reserve(skb, (dev->hard_header_len + 15) & ~15); | |
1142 | memcpy(skb_put(skb, len - hdr_len), buf + hdr_len, len - hdr_len); | |
1143 | ether_type = hdr->uf.ether_type; | |
1144 | } else { | |
1145 | /* A datagram fragment has been received, now the fun begins. */ | |
1146 | ||
1147 | struct list_head *pdgl, *lh; | |
1148 | struct partial_datagram *pd; | |
1149 | int fg_off; | |
1150 | int fg_len = len - hdr_len; | |
1151 | int dg_size; | |
1152 | int dgl; | |
1153 | int retval; | |
1154 | struct pdg_list *pdg = &(node_info->pdg); | |
1155 | ||
1156 | hdr->words.word3 = ntohs(hdr->words.word3); | |
1157 | /* The 4th header word is reserved so no need to do ntohs() */ | |
1158 | ||
1159 | if (hdr->common.lf == ETH1394_HDR_LF_FF) { | |
1160 | ether_type = hdr->ff.ether_type; | |
1161 | dgl = hdr->ff.dgl; | |
1162 | dg_size = hdr->ff.dg_size + 1; | |
1163 | fg_off = 0; | |
1164 | } else { | |
1165 | hdr->words.word2 = ntohs(hdr->words.word2); | |
1166 | dgl = hdr->sf.dgl; | |
1167 | dg_size = hdr->sf.dg_size + 1; | |
1168 | fg_off = hdr->sf.fg_off; | |
1169 | } | |
1170 | spin_lock_irqsave(&pdg->lock, flags); | |
1171 | ||
1172 | pdgl = &(pdg->list); | |
1173 | lh = find_partial_datagram(pdgl, dgl); | |
1174 | ||
1175 | if (lh == NULL) { | |
1176 | while (pdg->sz >= max_partial_datagrams) { | |
1177 | /* remove the oldest */ | |
1178 | purge_partial_datagram(pdgl->prev); | |
1179 | pdg->sz--; | |
1180 | } | |
1181 | ||
1182 | retval = new_partial_datagram(dev, pdgl, dgl, dg_size, | |
1183 | buf + hdr_len, fg_off, | |
1184 | fg_len); | |
1185 | if (retval < 0) { | |
1186 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1187 | goto bad_proto; | |
1188 | } | |
1189 | pdg->sz++; | |
1190 | lh = find_partial_datagram(pdgl, dgl); | |
1191 | } else { | |
1192 | struct partial_datagram *pd; | |
1193 | ||
1194 | pd = list_entry(lh, struct partial_datagram, list); | |
1195 | ||
1196 | if (fragment_overlap(&pd->frag_info, fg_off, fg_len)) { | |
1197 | /* Overlapping fragments, obliterate old | |
1198 | * datagram and start new one. */ | |
1199 | purge_partial_datagram(lh); | |
1200 | retval = new_partial_datagram(dev, pdgl, dgl, | |
1201 | dg_size, | |
1202 | buf + hdr_len, | |
1203 | fg_off, fg_len); | |
1204 | if (retval < 0) { | |
1205 | pdg->sz--; | |
1206 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1207 | goto bad_proto; | |
1208 | } | |
1209 | } else { | |
1210 | retval = update_partial_datagram(pdgl, lh, | |
1211 | buf + hdr_len, | |
1212 | fg_off, fg_len); | |
1213 | if (retval < 0) { | |
1214 | /* Couldn't save off fragment anyway | |
1215 | * so might as well obliterate the | |
1216 | * datagram now. */ | |
1217 | purge_partial_datagram(lh); | |
1218 | pdg->sz--; | |
1219 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1220 | goto bad_proto; | |
1221 | } | |
1222 | } /* fragment overlap */ | |
1223 | } /* new datagram or add to existing one */ | |
1224 | ||
1225 | pd = list_entry(lh, struct partial_datagram, list); | |
1226 | ||
1227 | if (hdr->common.lf == ETH1394_HDR_LF_FF) { | |
1228 | pd->ether_type = ether_type; | |
1229 | } | |
1230 | ||
1231 | if (is_datagram_complete(lh, dg_size)) { | |
1232 | ether_type = pd->ether_type; | |
1233 | pdg->sz--; | |
1234 | skb = skb_get(pd->skb); | |
1235 | purge_partial_datagram(lh); | |
1236 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1237 | } else { | |
1238 | /* Datagram is not complete, we're done for the | |
1239 | * moment. */ | |
1240 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1241 | return 0; | |
1242 | } | |
1243 | } /* unframgented datagram or fragmented one */ | |
1244 | ||
1245 | /* Write metadata, and then pass to the receive level */ | |
1246 | skb->dev = dev; | |
1247 | skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */ | |
1248 | ||
1249 | /* Parse the encapsulation header. This actually does the job of | |
1250 | * converting to an ethernet frame header, aswell as arp | |
1251 | * conversion if needed. ARP conversion is easier in this | |
1252 | * direction, since we are using ethernet as our backend. */ | |
1253 | skb->protocol = ether1394_parse_encap(skb, dev, srcid, destid, | |
1254 | ether_type); | |
1255 | ||
1256 | ||
1257 | spin_lock_irqsave(&priv->lock, flags); | |
1258 | if (!skb->protocol) { | |
1259 | priv->stats.rx_errors++; | |
1260 | priv->stats.rx_dropped++; | |
1261 | dev_kfree_skb_any(skb); | |
1262 | goto bad_proto; | |
1263 | } | |
1264 | ||
1265 | if (netif_rx(skb) == NET_RX_DROP) { | |
1266 | priv->stats.rx_errors++; | |
1267 | priv->stats.rx_dropped++; | |
1268 | goto bad_proto; | |
1269 | } | |
1270 | ||
1271 | /* Statistics */ | |
1272 | priv->stats.rx_packets++; | |
1273 | priv->stats.rx_bytes += skb->len; | |
1274 | ||
1275 | bad_proto: | |
1276 | if (netif_queue_stopped(dev)) | |
1277 | netif_wake_queue(dev); | |
1278 | spin_unlock_irqrestore(&priv->lock, flags); | |
1279 | ||
1280 | dev->last_rx = jiffies; | |
1281 | ||
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | static int ether1394_write(struct hpsb_host *host, int srcid, int destid, | |
1286 | quadlet_t *data, u64 addr, size_t len, u16 flags) | |
1287 | { | |
1288 | struct eth1394_host_info *hi; | |
1289 | ||
1290 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
1291 | if (hi == NULL) { | |
1292 | ETH1394_PRINT_G(KERN_ERR, "Could not find net device for host %s\n", | |
1293 | host->driver->name); | |
1294 | return RCODE_ADDRESS_ERROR; | |
1295 | } | |
1296 | ||
1297 | if (ether1394_data_handler(hi->dev, srcid, destid, (char*)data, len)) | |
1298 | return RCODE_ADDRESS_ERROR; | |
1299 | else | |
1300 | return RCODE_COMPLETE; | |
1301 | } | |
1302 | ||
1303 | static void ether1394_iso(struct hpsb_iso *iso) | |
1304 | { | |
1305 | quadlet_t *data; | |
1306 | char *buf; | |
1307 | struct eth1394_host_info *hi; | |
1308 | struct net_device *dev; | |
1309 | struct eth1394_priv *priv; | |
1310 | unsigned int len; | |
1311 | u32 specifier_id; | |
1312 | u16 source_id; | |
1313 | int i; | |
1314 | int nready; | |
1315 | ||
1316 | hi = hpsb_get_hostinfo(ð1394_highlevel, iso->host); | |
1317 | if (hi == NULL) { | |
1318 | ETH1394_PRINT_G(KERN_ERR, "Could not find net device for host %s\n", | |
1319 | iso->host->driver->name); | |
1320 | return; | |
1321 | } | |
1322 | ||
1323 | dev = hi->dev; | |
1324 | ||
1325 | nready = hpsb_iso_n_ready(iso); | |
1326 | for (i = 0; i < nready; i++) { | |
1327 | struct hpsb_iso_packet_info *info = | |
1328 | &iso->infos[(iso->first_packet + i) % iso->buf_packets]; | |
1329 | data = (quadlet_t*) (iso->data_buf.kvirt + info->offset); | |
1330 | ||
1331 | /* skip over GASP header */ | |
1332 | buf = (char *)data + 8; | |
1333 | len = info->len - 8; | |
1334 | ||
1335 | specifier_id = (((be32_to_cpu(data[0]) & 0xffff) << 8) | | |
1336 | ((be32_to_cpu(data[1]) & 0xff000000) >> 24)); | |
1337 | source_id = be32_to_cpu(data[0]) >> 16; | |
1338 | ||
1339 | priv = netdev_priv(dev); | |
1340 | ||
1341 | if (info->channel != (iso->host->csr.broadcast_channel & 0x3f) || | |
1342 | specifier_id != ETHER1394_GASP_SPECIFIER_ID) { | |
1343 | /* This packet is not for us */ | |
1344 | continue; | |
1345 | } | |
1346 | ether1394_data_handler(dev, source_id, LOCAL_BUS | ALL_NODES, | |
1347 | buf, len); | |
1348 | } | |
1349 | ||
1350 | hpsb_iso_recv_release_packets(iso, i); | |
1351 | ||
1352 | dev->last_rx = jiffies; | |
1353 | } | |
1354 | ||
1355 | /****************************************** | |
1356 | * Datagram transmission code | |
1357 | ******************************************/ | |
1358 | ||
1359 | /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire | |
1360 | * arphdr) is the same format as the ip1394 header, so they overlap. The rest | |
1361 | * needs to be munged a bit. The remainder of the arphdr is formatted based | |
1362 | * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to | |
1363 | * judge. | |
1364 | * | |
1365 | * Now that the EUI is used for the hardware address all we need to do to make | |
1366 | * this work for 1394 is to insert 2 quadlets that contain max_rec size, | |
1367 | * speed, and unicast FIFO address information between the sender_unique_id | |
1368 | * and the IP addresses. | |
1369 | */ | |
1370 | static inline void ether1394_arp_to_1394arp(struct sk_buff *skb, | |
1371 | struct net_device *dev) | |
1372 | { | |
1373 | struct eth1394_priv *priv = netdev_priv(dev); | |
1374 | ||
1375 | struct arphdr *arp = (struct arphdr *)skb->data; | |
1376 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
1377 | struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data; | |
1378 | ||
1379 | /* Believe it or not, all that need to happen is sender IP get moved | |
1380 | * and set hw_addr_len, max_rec, sspd, fifo_hi and fifo_lo. */ | |
1381 | arp1394->hw_addr_len = 16; | |
1382 | arp1394->sip = *(u32*)(arp_ptr + ETH1394_ALEN); | |
1383 | arp1394->max_rec = priv->host->csr.max_rec; | |
1384 | arp1394->sspd = priv->host->csr.lnk_spd; | |
1385 | arp1394->fifo_hi = htons (priv->local_fifo >> 32); | |
1386 | arp1394->fifo_lo = htonl (priv->local_fifo & ~0x0); | |
1387 | ||
1388 | return; | |
1389 | } | |
1390 | ||
1391 | /* We need to encapsulate the standard header with our own. We use the | |
1392 | * ethernet header's proto for our own. */ | |
1393 | static inline unsigned int ether1394_encapsulate_prep(unsigned int max_payload, | |
02f4213f | 1394 | __be16 proto, |
1da177e4 LT |
1395 | union eth1394_hdr *hdr, |
1396 | u16 dg_size, u16 dgl) | |
1397 | { | |
1398 | unsigned int adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_UF]; | |
1399 | ||
1400 | /* Does it all fit in one packet? */ | |
1401 | if (dg_size <= adj_max_payload) { | |
1402 | hdr->uf.lf = ETH1394_HDR_LF_UF; | |
1403 | hdr->uf.ether_type = proto; | |
1404 | } else { | |
1405 | hdr->ff.lf = ETH1394_HDR_LF_FF; | |
1406 | hdr->ff.ether_type = proto; | |
1407 | hdr->ff.dg_size = dg_size - 1; | |
1408 | hdr->ff.dgl = dgl; | |
1409 | adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_FF]; | |
1410 | } | |
1411 | return((dg_size + (adj_max_payload - 1)) / adj_max_payload); | |
1412 | } | |
1413 | ||
1414 | static inline unsigned int ether1394_encapsulate(struct sk_buff *skb, | |
1415 | unsigned int max_payload, | |
1416 | union eth1394_hdr *hdr) | |
1417 | { | |
1418 | union eth1394_hdr *bufhdr; | |
1419 | int ftype = hdr->common.lf; | |
1420 | int hdrsz = hdr_type_len[ftype]; | |
1421 | unsigned int adj_max_payload = max_payload - hdrsz; | |
1422 | ||
1423 | switch(ftype) { | |
1424 | case ETH1394_HDR_LF_UF: | |
1425 | bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz); | |
1426 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1427 | bufhdr->words.word2 = hdr->words.word2; | |
1428 | break; | |
1429 | ||
1430 | case ETH1394_HDR_LF_FF: | |
1431 | bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz); | |
1432 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1433 | bufhdr->words.word2 = hdr->words.word2; | |
1434 | bufhdr->words.word3 = htons(hdr->words.word3); | |
1435 | bufhdr->words.word4 = 0; | |
1436 | ||
1437 | /* Set frag type here for future interior fragments */ | |
1438 | hdr->common.lf = ETH1394_HDR_LF_IF; | |
1439 | hdr->sf.fg_off = 0; | |
1440 | break; | |
1441 | ||
1442 | default: | |
1443 | hdr->sf.fg_off += adj_max_payload; | |
1444 | bufhdr = (union eth1394_hdr *)skb_pull(skb, adj_max_payload); | |
1445 | if (max_payload >= skb->len) | |
1446 | hdr->common.lf = ETH1394_HDR_LF_LF; | |
1447 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1448 | bufhdr->words.word2 = htons(hdr->words.word2); | |
1449 | bufhdr->words.word3 = htons(hdr->words.word3); | |
1450 | bufhdr->words.word4 = 0; | |
1451 | } | |
1452 | ||
1453 | return min(max_payload, skb->len); | |
1454 | } | |
1455 | ||
1456 | static inline struct hpsb_packet *ether1394_alloc_common_packet(struct hpsb_host *host) | |
1457 | { | |
1458 | struct hpsb_packet *p; | |
1459 | ||
1460 | p = hpsb_alloc_packet(0); | |
1461 | if (p) { | |
1462 | p->host = host; | |
1463 | p->generation = get_hpsb_generation(host); | |
1464 | p->type = hpsb_async; | |
1465 | } | |
1466 | return p; | |
1467 | } | |
1468 | ||
1469 | static inline int ether1394_prep_write_packet(struct hpsb_packet *p, | |
1470 | struct hpsb_host *host, | |
1471 | nodeid_t node, u64 addr, | |
1472 | void * data, int tx_len) | |
1473 | { | |
1474 | p->node_id = node; | |
1475 | p->data = NULL; | |
1476 | ||
1477 | p->tcode = TCODE_WRITEB; | |
1478 | p->header[1] = (host->node_id << 16) | (addr >> 32); | |
1479 | p->header[2] = addr & 0xffffffff; | |
1480 | ||
1481 | p->header_size = 16; | |
1482 | p->expect_response = 1; | |
1483 | ||
1484 | if (hpsb_get_tlabel(p)) { | |
1485 | ETH1394_PRINT_G(KERN_ERR, "No more tlabels left while sending " | |
1486 | "to node " NODE_BUS_FMT "\n", NODE_BUS_ARGS(host, node)); | |
1487 | return -1; | |
1488 | } | |
1489 | p->header[0] = (p->node_id << 16) | (p->tlabel << 10) | |
1490 | | (1 << 8) | (TCODE_WRITEB << 4); | |
1491 | ||
1492 | p->header[3] = tx_len << 16; | |
1493 | p->data_size = (tx_len + 3) & ~3; | |
1494 | p->data = (quadlet_t*)data; | |
1495 | ||
1496 | return 0; | |
1497 | } | |
1498 | ||
1499 | static inline void ether1394_prep_gasp_packet(struct hpsb_packet *p, | |
1500 | struct eth1394_priv *priv, | |
1501 | struct sk_buff *skb, int length) | |
1502 | { | |
1503 | p->header_size = 4; | |
1504 | p->tcode = TCODE_STREAM_DATA; | |
1505 | ||
1506 | p->header[0] = (length << 16) | (3 << 14) | |
1507 | | ((priv->broadcast_channel) << 8) | |
1508 | | (TCODE_STREAM_DATA << 4); | |
1509 | p->data_size = length; | |
1510 | p->data = ((quadlet_t*)skb->data) - 2; | |
1511 | p->data[0] = cpu_to_be32((priv->host->node_id << 16) | | |
1512 | ETHER1394_GASP_SPECIFIER_ID_HI); | |
7136b807 BC |
1513 | p->data[1] = cpu_to_be32((ETHER1394_GASP_SPECIFIER_ID_LO << 24) | |
1514 | ETHER1394_GASP_VERSION); | |
1da177e4 LT |
1515 | |
1516 | /* Setting the node id to ALL_NODES (not LOCAL_BUS | ALL_NODES) | |
1517 | * prevents hpsb_send_packet() from setting the speed to an arbitrary | |
1518 | * value based on packet->node_id if packet->node_id is not set. */ | |
1519 | p->node_id = ALL_NODES; | |
1520 | p->speed_code = priv->bc_sspd; | |
1521 | } | |
1522 | ||
1523 | static inline void ether1394_free_packet(struct hpsb_packet *packet) | |
1524 | { | |
1525 | if (packet->tcode != TCODE_STREAM_DATA) | |
1526 | hpsb_free_tlabel(packet); | |
1527 | hpsb_free_packet(packet); | |
1528 | } | |
1529 | ||
1530 | static void ether1394_complete_cb(void *__ptask); | |
1531 | ||
1532 | static int ether1394_send_packet(struct packet_task *ptask, unsigned int tx_len) | |
1533 | { | |
1534 | struct eth1394_priv *priv = ptask->priv; | |
1535 | struct hpsb_packet *packet = NULL; | |
1536 | ||
1537 | packet = ether1394_alloc_common_packet(priv->host); | |
1538 | if (!packet) | |
1539 | return -1; | |
1540 | ||
1541 | if (ptask->tx_type == ETH1394_GASP) { | |
1542 | int length = tx_len + (2 * sizeof(quadlet_t)); | |
1543 | ||
1544 | ether1394_prep_gasp_packet(packet, priv, ptask->skb, length); | |
1545 | } else if (ether1394_prep_write_packet(packet, priv->host, | |
1546 | ptask->dest_node, | |
1547 | ptask->addr, ptask->skb->data, | |
1548 | tx_len)) { | |
1549 | hpsb_free_packet(packet); | |
1550 | return -1; | |
1551 | } | |
1552 | ||
1553 | ptask->packet = packet; | |
1554 | hpsb_set_packet_complete_task(ptask->packet, ether1394_complete_cb, | |
1555 | ptask); | |
1556 | ||
1557 | if (hpsb_send_packet(packet) < 0) { | |
1558 | ether1394_free_packet(packet); | |
1559 | return -1; | |
1560 | } | |
1561 | ||
1562 | return 0; | |
1563 | } | |
1564 | ||
1565 | ||
1566 | /* Task function to be run when a datagram transmission is completed */ | |
1567 | static inline void ether1394_dg_complete(struct packet_task *ptask, int fail) | |
1568 | { | |
1569 | struct sk_buff *skb = ptask->skb; | |
1570 | struct net_device *dev = skb->dev; | |
1571 | struct eth1394_priv *priv = netdev_priv(dev); | |
1572 | unsigned long flags; | |
1573 | ||
1574 | /* Statistics */ | |
1575 | spin_lock_irqsave(&priv->lock, flags); | |
1576 | if (fail) { | |
1577 | priv->stats.tx_dropped++; | |
1578 | priv->stats.tx_errors++; | |
1579 | } else { | |
1580 | priv->stats.tx_bytes += skb->len; | |
1581 | priv->stats.tx_packets++; | |
1582 | } | |
1583 | spin_unlock_irqrestore(&priv->lock, flags); | |
1584 | ||
1585 | dev_kfree_skb_any(skb); | |
1586 | kmem_cache_free(packet_task_cache, ptask); | |
1587 | } | |
1588 | ||
1589 | ||
1590 | /* Callback for when a packet has been sent and the status of that packet is | |
1591 | * known */ | |
1592 | static void ether1394_complete_cb(void *__ptask) | |
1593 | { | |
1594 | struct packet_task *ptask = (struct packet_task *)__ptask; | |
1595 | struct hpsb_packet *packet = ptask->packet; | |
1596 | int fail = 0; | |
1597 | ||
1598 | if (packet->tcode != TCODE_STREAM_DATA) | |
1599 | fail = hpsb_packet_success(packet); | |
1600 | ||
1601 | ether1394_free_packet(packet); | |
1602 | ||
1603 | ptask->outstanding_pkts--; | |
1604 | if (ptask->outstanding_pkts > 0 && !fail) { | |
1605 | int tx_len; | |
1606 | ||
1607 | /* Add the encapsulation header to the fragment */ | |
1608 | tx_len = ether1394_encapsulate(ptask->skb, ptask->max_payload, | |
1609 | &ptask->hdr); | |
1610 | if (ether1394_send_packet(ptask, tx_len)) | |
1611 | ether1394_dg_complete(ptask, 1); | |
1612 | } else { | |
1613 | ether1394_dg_complete(ptask, fail); | |
1614 | } | |
1615 | } | |
1616 | ||
1617 | ||
1618 | ||
1619 | /* Transmit a packet (called by kernel) */ | |
1620 | static int ether1394_tx (struct sk_buff *skb, struct net_device *dev) | |
1621 | { | |
b4e3ca1a | 1622 | gfp_t kmflags = in_interrupt() ? GFP_ATOMIC : GFP_KERNEL; |
1da177e4 LT |
1623 | struct eth1394hdr *eth; |
1624 | struct eth1394_priv *priv = netdev_priv(dev); | |
02f4213f | 1625 | __be16 proto; |
1da177e4 LT |
1626 | unsigned long flags; |
1627 | nodeid_t dest_node; | |
1628 | eth1394_tx_type tx_type; | |
1629 | int ret = 0; | |
1630 | unsigned int tx_len; | |
1631 | unsigned int max_payload; | |
1632 | u16 dg_size; | |
1633 | u16 dgl; | |
1634 | struct packet_task *ptask; | |
1635 | struct eth1394_node_ref *node; | |
1636 | struct eth1394_node_info *node_info = NULL; | |
1637 | ||
1638 | ptask = kmem_cache_alloc(packet_task_cache, kmflags); | |
1639 | if (ptask == NULL) { | |
1640 | ret = -ENOMEM; | |
1641 | goto fail; | |
1642 | } | |
1643 | ||
1644 | /* XXX Ignore this for now. Noticed that when MacOSX is the IRM, | |
1645 | * it does not set our validity bit. We need to compensate for | |
1646 | * that somewhere else, but not in eth1394. */ | |
1647 | #if 0 | |
1648 | if ((priv->host->csr.broadcast_channel & 0xc0000000) != 0xc0000000) { | |
1649 | ret = -EAGAIN; | |
1650 | goto fail; | |
1651 | } | |
1652 | #endif | |
1653 | ||
1654 | if ((skb = skb_share_check (skb, kmflags)) == NULL) { | |
1655 | ret = -ENOMEM; | |
1656 | goto fail; | |
1657 | } | |
1658 | ||
1659 | /* Get rid of the fake eth1394 header, but save a pointer */ | |
1660 | eth = (struct eth1394hdr*)skb->data; | |
1661 | skb_pull(skb, ETH1394_HLEN); | |
1662 | ||
1663 | proto = eth->h_proto; | |
1664 | dg_size = skb->len; | |
1665 | ||
1666 | /* Set the transmission type for the packet. ARP packets and IP | |
1667 | * broadcast packets are sent via GASP. */ | |
1668 | if (memcmp(eth->h_dest, dev->broadcast, ETH1394_ALEN) == 0 || | |
7136b807 BC |
1669 | proto == htons(ETH_P_ARP) || |
1670 | (proto == htons(ETH_P_IP) && | |
1671 | IN_MULTICAST(ntohl(skb->nh.iph->daddr)))) { | |
1da177e4 LT |
1672 | tx_type = ETH1394_GASP; |
1673 | dest_node = LOCAL_BUS | ALL_NODES; | |
1674 | max_payload = priv->bc_maxpayload - ETHER1394_GASP_OVERHEAD; | |
1675 | BUG_ON(max_payload < (512 - ETHER1394_GASP_OVERHEAD)); | |
1676 | dgl = priv->bc_dgl; | |
1677 | if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF]) | |
1678 | priv->bc_dgl++; | |
1679 | } else { | |
c20e3945 DM |
1680 | __be64 guid = get_unaligned((u64 *)eth->h_dest); |
1681 | ||
1da177e4 | 1682 | node = eth1394_find_node_guid(&priv->ip_node_list, |
c20e3945 | 1683 | be64_to_cpu(guid)); |
1da177e4 LT |
1684 | if (!node) { |
1685 | ret = -EAGAIN; | |
1686 | goto fail; | |
1687 | } | |
1688 | node_info = (struct eth1394_node_info*)node->ud->device.driver_data; | |
6737231e | 1689 | if (node_info->fifo == CSR1212_INVALID_ADDR_SPACE) { |
1da177e4 LT |
1690 | ret = -EAGAIN; |
1691 | goto fail; | |
1692 | } | |
1693 | ||
1694 | dest_node = node->ud->ne->nodeid; | |
1695 | max_payload = node_info->maxpayload; | |
1696 | BUG_ON(max_payload < (512 - ETHER1394_GASP_OVERHEAD)); | |
1697 | ||
1698 | dgl = node_info->dgl; | |
1699 | if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF]) | |
1700 | node_info->dgl++; | |
1701 | tx_type = ETH1394_WRREQ; | |
1702 | } | |
1703 | ||
1704 | /* If this is an ARP packet, convert it */ | |
7136b807 | 1705 | if (proto == htons(ETH_P_ARP)) |
1da177e4 LT |
1706 | ether1394_arp_to_1394arp (skb, dev); |
1707 | ||
1708 | ptask->hdr.words.word1 = 0; | |
1709 | ptask->hdr.words.word2 = 0; | |
1710 | ptask->hdr.words.word3 = 0; | |
1711 | ptask->hdr.words.word4 = 0; | |
1712 | ptask->skb = skb; | |
1713 | ptask->priv = priv; | |
1714 | ptask->tx_type = tx_type; | |
1715 | ||
1716 | if (tx_type != ETH1394_GASP) { | |
1717 | u64 addr; | |
1718 | ||
1719 | spin_lock_irqsave(&priv->lock, flags); | |
1720 | addr = node_info->fifo; | |
1721 | spin_unlock_irqrestore(&priv->lock, flags); | |
1722 | ||
1723 | ptask->addr = addr; | |
1724 | ptask->dest_node = dest_node; | |
1725 | } | |
1726 | ||
1727 | ptask->tx_type = tx_type; | |
1728 | ptask->max_payload = max_payload; | |
1729 | ptask->outstanding_pkts = ether1394_encapsulate_prep(max_payload, proto, | |
1730 | &ptask->hdr, dg_size, | |
1731 | dgl); | |
1732 | ||
1733 | /* Add the encapsulation header to the fragment */ | |
1734 | tx_len = ether1394_encapsulate(skb, max_payload, &ptask->hdr); | |
1735 | dev->trans_start = jiffies; | |
1736 | if (ether1394_send_packet(ptask, tx_len)) | |
1737 | goto fail; | |
1738 | ||
1739 | netif_wake_queue(dev); | |
1740 | return 0; | |
1741 | fail: | |
1742 | if (ptask) | |
1743 | kmem_cache_free(packet_task_cache, ptask); | |
1744 | ||
1745 | if (skb != NULL) | |
1746 | dev_kfree_skb(skb); | |
1747 | ||
1748 | spin_lock_irqsave (&priv->lock, flags); | |
1749 | priv->stats.tx_dropped++; | |
1750 | priv->stats.tx_errors++; | |
1751 | spin_unlock_irqrestore (&priv->lock, flags); | |
1752 | ||
1753 | if (netif_queue_stopped(dev)) | |
1754 | netif_wake_queue(dev); | |
1755 | ||
1756 | return 0; /* returning non-zero causes serious problems */ | |
1757 | } | |
1758 | ||
1759 | static void ether1394_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) | |
1760 | { | |
1761 | strcpy (info->driver, driver_name); | |
1da177e4 LT |
1762 | /* FIXME XXX provide sane businfo */ |
1763 | strcpy (info->bus_info, "ieee1394"); | |
1764 | } | |
1765 | ||
1766 | static struct ethtool_ops ethtool_ops = { | |
1767 | .get_drvinfo = ether1394_get_drvinfo | |
1768 | }; | |
1769 | ||
1770 | static int __init ether1394_init_module (void) | |
1771 | { | |
1772 | packet_task_cache = kmem_cache_create("packet_task", sizeof(struct packet_task), | |
1773 | 0, 0, NULL, NULL); | |
1774 | ||
1775 | /* Register ourselves as a highlevel driver */ | |
1776 | hpsb_register_highlevel(ð1394_highlevel); | |
1777 | ||
1778 | return hpsb_register_protocol(ð1394_proto_driver); | |
1779 | } | |
1780 | ||
1781 | static void __exit ether1394_exit_module (void) | |
1782 | { | |
1783 | hpsb_unregister_protocol(ð1394_proto_driver); | |
1784 | hpsb_unregister_highlevel(ð1394_highlevel); | |
1785 | kmem_cache_destroy(packet_task_cache); | |
1786 | } | |
1787 | ||
1788 | module_init(ether1394_init_module); | |
1789 | module_exit(ether1394_exit_module); |