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1da177e4 | 1 | /* |
efbeccf1 | 2 | * eth1394.c -- IPv4 driver for Linux IEEE-1394 Subsystem |
1da177e4 LT |
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 | ||
efbeccf1 SR |
25 | /* |
26 | * This driver intends to support RFC 2734, which describes a method for | |
27 | * transporting IPv4 datagrams over IEEE-1394 serial busses. | |
1da177e4 LT |
28 | * |
29 | * TODO: | |
30 | * RFC 2734 related: | |
31 | * - Add MCAP. Limited Multicast exists only to 224.0.0.1 and 224.0.0.2. | |
32 | * | |
33 | * Non-RFC 2734 related: | |
34 | * - Handle fragmented skb's coming from the networking layer. | |
35 | * - Move generic GASP reception to core 1394 code | |
36 | * - Convert kmalloc/kfree for link fragments to use kmem_cache_* instead | |
37 | * - Stability improvements | |
38 | * - Performance enhancements | |
39 | * - Consider garbage collecting old partial datagrams after X amount of time | |
40 | */ | |
41 | ||
1da177e4 LT |
42 | #include <linux/module.h> |
43 | ||
1da177e4 LT |
44 | #include <linux/kernel.h> |
45 | #include <linux/slab.h> | |
46 | #include <linux/errno.h> | |
47 | #include <linux/types.h> | |
48 | #include <linux/delay.h> | |
49 | #include <linux/init.h> | |
7a97bc03 | 50 | #include <linux/workqueue.h> |
1da177e4 LT |
51 | |
52 | #include <linux/netdevice.h> | |
53 | #include <linux/inetdevice.h> | |
1da177e4 LT |
54 | #include <linux/if_arp.h> |
55 | #include <linux/if_ether.h> | |
56 | #include <linux/ip.h> | |
57 | #include <linux/in.h> | |
58 | #include <linux/tcp.h> | |
59 | #include <linux/skbuff.h> | |
60 | #include <linux/bitops.h> | |
1da177e4 LT |
61 | #include <asm/uaccess.h> |
62 | #include <asm/delay.h> | |
c20e3945 | 63 | #include <asm/unaligned.h> |
1da177e4 LT |
64 | #include <net/arp.h> |
65 | ||
de4394f1 | 66 | #include "config_roms.h" |
1da177e4 | 67 | #include "csr1212.h" |
de4394f1 SR |
68 | #include "eth1394.h" |
69 | #include "highlevel.h" | |
70 | #include "ieee1394.h" | |
1da177e4 | 71 | #include "ieee1394_core.h" |
de4394f1 | 72 | #include "ieee1394_hotplug.h" |
1da177e4 | 73 | #include "ieee1394_transactions.h" |
de4394f1 | 74 | #include "ieee1394_types.h" |
1da177e4 LT |
75 | #include "iso.h" |
76 | #include "nodemgr.h" | |
1da177e4 LT |
77 | |
78 | #define ETH1394_PRINT_G(level, fmt, args...) \ | |
79 | printk(level "%s: " fmt, driver_name, ## args) | |
80 | ||
81 | #define ETH1394_PRINT(level, dev_name, fmt, args...) \ | |
82 | printk(level "%s: %s: " fmt, driver_name, dev_name, ## args) | |
83 | ||
1da177e4 LT |
84 | struct fragment_info { |
85 | struct list_head list; | |
86 | int offset; | |
87 | int len; | |
88 | }; | |
89 | ||
90 | struct partial_datagram { | |
91 | struct list_head list; | |
92 | u16 dgl; | |
93 | u16 dg_size; | |
faf26bcc | 94 | __be16 ether_type; |
1da177e4 LT |
95 | struct sk_buff *skb; |
96 | char *pbuf; | |
97 | struct list_head frag_info; | |
98 | }; | |
99 | ||
100 | struct pdg_list { | |
efbeccf1 SR |
101 | struct list_head list; /* partial datagram list per node */ |
102 | unsigned int sz; /* partial datagram list size per node */ | |
103 | spinlock_t lock; /* partial datagram lock */ | |
1da177e4 LT |
104 | }; |
105 | ||
106 | struct eth1394_host_info { | |
107 | struct hpsb_host *host; | |
108 | struct net_device *dev; | |
109 | }; | |
110 | ||
111 | struct eth1394_node_ref { | |
112 | struct unit_directory *ud; | |
113 | struct list_head list; | |
114 | }; | |
115 | ||
116 | struct eth1394_node_info { | |
efbeccf1 SR |
117 | u16 maxpayload; /* max payload */ |
118 | u8 sspd; /* max speed */ | |
119 | u64 fifo; /* FIFO address */ | |
120 | struct pdg_list pdg; /* partial RX datagram lists */ | |
121 | int dgl; /* outgoing datagram label */ | |
1da177e4 LT |
122 | }; |
123 | ||
efbeccf1 | 124 | static const char driver_name[] = "eth1394"; |
1da177e4 | 125 | |
e18b890b | 126 | static struct kmem_cache *packet_task_cache; |
1da177e4 LT |
127 | |
128 | static struct hpsb_highlevel eth1394_highlevel; | |
129 | ||
130 | /* Use common.lf to determine header len */ | |
131 | static const int hdr_type_len[] = { | |
efbeccf1 SR |
132 | sizeof(struct eth1394_uf_hdr), |
133 | sizeof(struct eth1394_ff_hdr), | |
134 | sizeof(struct eth1394_sf_hdr), | |
135 | sizeof(struct eth1394_sf_hdr) | |
1da177e4 LT |
136 | }; |
137 | ||
1da177e4 LT |
138 | static const u16 eth1394_speedto_maxpayload[] = { |
139 | /* S100, S200, S400, S800, S1600, S3200 */ | |
140 | 512, 1024, 2048, 4096, 4096, 4096 | |
141 | }; | |
142 | ||
143 | MODULE_AUTHOR("Ben Collins (bcollins@debian.org)"); | |
144 | MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)"); | |
145 | MODULE_LICENSE("GPL"); | |
146 | ||
efbeccf1 SR |
147 | /* |
148 | * The max_partial_datagrams parameter is the maximum number of fragmented | |
1da177e4 LT |
149 | * datagrams per node that eth1394 will keep in memory. Providing an upper |
150 | * bound allows us to limit the amount of memory that partial datagrams | |
151 | * consume in the event that some partial datagrams are never completed. | |
152 | */ | |
153 | static int max_partial_datagrams = 25; | |
154 | module_param(max_partial_datagrams, int, S_IRUGO | S_IWUSR); | |
155 | MODULE_PARM_DESC(max_partial_datagrams, | |
156 | "Maximum number of partially received fragmented datagrams " | |
157 | "(default = 25)."); | |
158 | ||
159 | ||
160 | static int ether1394_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
161 | unsigned short type, const void *daddr, |
162 | const void *saddr, unsigned len); | |
1da177e4 | 163 | static int ether1394_rebuild_header(struct sk_buff *skb); |
b95cce35 SH |
164 | static int ether1394_header_parse(const struct sk_buff *skb, |
165 | unsigned char *haddr); | |
3b04ddde SH |
166 | static int ether1394_header_cache(const struct neighbour *neigh, |
167 | struct hh_cache *hh); | |
1da177e4 | 168 | static void ether1394_header_cache_update(struct hh_cache *hh, |
3b04ddde SH |
169 | const struct net_device *dev, |
170 | const unsigned char *haddr); | |
6fef4c0c SH |
171 | static netdev_tx_t ether1394_tx(struct sk_buff *skb, |
172 | struct net_device *dev); | |
1da177e4 LT |
173 | static void ether1394_iso(struct hpsb_iso *iso); |
174 | ||
1da177e4 LT |
175 | static int ether1394_write(struct hpsb_host *host, int srcid, int destid, |
176 | quadlet_t *data, u64 addr, size_t len, u16 flags); | |
efbeccf1 SR |
177 | static void ether1394_add_host(struct hpsb_host *host); |
178 | static void ether1394_remove_host(struct hpsb_host *host); | |
179 | static void ether1394_host_reset(struct hpsb_host *host); | |
1da177e4 LT |
180 | |
181 | /* Function for incoming 1394 packets */ | |
1c4fb577 | 182 | static const struct hpsb_address_ops addr_ops = { |
1da177e4 LT |
183 | .write = ether1394_write, |
184 | }; | |
185 | ||
186 | /* Ieee1394 highlevel driver functions */ | |
187 | static struct hpsb_highlevel eth1394_highlevel = { | |
188 | .name = driver_name, | |
189 | .add_host = ether1394_add_host, | |
190 | .remove_host = ether1394_remove_host, | |
191 | .host_reset = ether1394_host_reset, | |
192 | }; | |
193 | ||
5009d269 | 194 | static int ether1394_recv_init(struct eth1394_priv *priv) |
09d7a96f | 195 | { |
efbeccf1 SR |
196 | unsigned int iso_buf_size; |
197 | ||
198 | /* FIXME: rawiso limits us to PAGE_SIZE */ | |
199 | iso_buf_size = min((unsigned int)PAGE_SIZE, | |
200 | 2 * (1U << (priv->host->csr.max_rec + 1))); | |
09d7a96f JD |
201 | |
202 | priv->iso = hpsb_iso_recv_init(priv->host, | |
efbeccf1 | 203 | ETHER1394_GASP_BUFFERS * iso_buf_size, |
09d7a96f JD |
204 | ETHER1394_GASP_BUFFERS, |
205 | priv->broadcast_channel, | |
206 | HPSB_ISO_DMA_PACKET_PER_BUFFER, | |
207 | 1, ether1394_iso); | |
208 | if (priv->iso == NULL) { | |
5009d269 | 209 | ETH1394_PRINT_G(KERN_ERR, "Failed to allocate IR context\n"); |
09d7a96f JD |
210 | priv->bc_state = ETHER1394_BC_ERROR; |
211 | return -EAGAIN; | |
212 | } | |
213 | ||
214 | if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0) | |
215 | priv->bc_state = ETHER1394_BC_STOPPED; | |
216 | else | |
217 | priv->bc_state = ETHER1394_BC_RUNNING; | |
218 | return 0; | |
219 | } | |
220 | ||
1da177e4 | 221 | /* This is called after an "ifup" */ |
09d7a96f | 222 | static int ether1394_open(struct net_device *dev) |
1da177e4 LT |
223 | { |
224 | struct eth1394_priv *priv = netdev_priv(dev); | |
09d7a96f | 225 | int ret; |
1da177e4 | 226 | |
1da177e4 | 227 | if (priv->bc_state == ETHER1394_BC_ERROR) { |
5009d269 | 228 | ret = ether1394_recv_init(priv); |
09d7a96f JD |
229 | if (ret) |
230 | return ret; | |
1da177e4 | 231 | } |
efbeccf1 | 232 | netif_start_queue(dev); |
1da177e4 LT |
233 | return 0; |
234 | } | |
235 | ||
236 | /* This is called after an "ifdown" */ | |
efbeccf1 | 237 | static int ether1394_stop(struct net_device *dev) |
1da177e4 | 238 | { |
7a97bc03 SR |
239 | /* flush priv->wake */ |
240 | flush_scheduled_work(); | |
241 | ||
efbeccf1 | 242 | netif_stop_queue(dev); |
1da177e4 LT |
243 | return 0; |
244 | } | |
245 | ||
efbeccf1 SR |
246 | /* FIXME: What to do if we timeout? I think a host reset is probably in order, |
247 | * so that's what we do. Should we increment the stat counters too? */ | |
248 | static void ether1394_tx_timeout(struct net_device *dev) | |
1da177e4 | 249 | { |
efbeccf1 SR |
250 | struct hpsb_host *host = |
251 | ((struct eth1394_priv *)netdev_priv(dev))->host; | |
1da177e4 | 252 | |
246a5fda SR |
253 | ETH1394_PRINT(KERN_ERR, dev->name, "Timeout, resetting host\n"); |
254 | ether1394_host_reset(host); | |
1da177e4 LT |
255 | } |
256 | ||
17bab407 SR |
257 | static inline int ether1394_max_mtu(struct hpsb_host* host) |
258 | { | |
259 | return (1 << (host->csr.max_rec + 1)) | |
260 | - sizeof(union eth1394_hdr) - ETHER1394_GASP_OVERHEAD; | |
261 | } | |
262 | ||
1da177e4 LT |
263 | static int ether1394_change_mtu(struct net_device *dev, int new_mtu) |
264 | { | |
17bab407 | 265 | int max_mtu; |
1da177e4 | 266 | |
17bab407 | 267 | if (new_mtu < 68) |
1da177e4 | 268 | return -EINVAL; |
efbeccf1 | 269 | |
17bab407 SR |
270 | max_mtu = ether1394_max_mtu( |
271 | ((struct eth1394_priv *)netdev_priv(dev))->host); | |
272 | if (new_mtu > max_mtu) { | |
273 | ETH1394_PRINT(KERN_INFO, dev->name, | |
274 | "Local node constrains MTU to %d\n", max_mtu); | |
275 | return -ERANGE; | |
276 | } | |
277 | ||
1da177e4 LT |
278 | dev->mtu = new_mtu; |
279 | return 0; | |
280 | } | |
281 | ||
282 | static void purge_partial_datagram(struct list_head *old) | |
283 | { | |
efbeccf1 | 284 | struct partial_datagram *pd; |
1da177e4 | 285 | struct list_head *lh, *n; |
efbeccf1 SR |
286 | struct fragment_info *fi; |
287 | ||
288 | pd = list_entry(old, struct partial_datagram, list); | |
1da177e4 LT |
289 | |
290 | list_for_each_safe(lh, n, &pd->frag_info) { | |
efbeccf1 | 291 | fi = list_entry(lh, struct fragment_info, list); |
1da177e4 LT |
292 | list_del(lh); |
293 | kfree(fi); | |
294 | } | |
295 | list_del(old); | |
296 | kfree_skb(pd->skb); | |
297 | kfree(pd); | |
298 | } | |
299 | ||
300 | /****************************************** | |
301 | * 1394 bus activity functions | |
302 | ******************************************/ | |
303 | ||
304 | static struct eth1394_node_ref *eth1394_find_node(struct list_head *inl, | |
305 | struct unit_directory *ud) | |
306 | { | |
307 | struct eth1394_node_ref *node; | |
308 | ||
309 | list_for_each_entry(node, inl, list) | |
310 | if (node->ud == ud) | |
311 | return node; | |
312 | ||
313 | return NULL; | |
314 | } | |
315 | ||
316 | static struct eth1394_node_ref *eth1394_find_node_guid(struct list_head *inl, | |
317 | u64 guid) | |
318 | { | |
319 | struct eth1394_node_ref *node; | |
320 | ||
321 | list_for_each_entry(node, inl, list) | |
322 | if (node->ud->ne->guid == guid) | |
323 | return node; | |
324 | ||
325 | return NULL; | |
326 | } | |
327 | ||
328 | static struct eth1394_node_ref *eth1394_find_node_nodeid(struct list_head *inl, | |
329 | nodeid_t nodeid) | |
330 | { | |
331 | struct eth1394_node_ref *node; | |
efbeccf1 SR |
332 | |
333 | list_for_each_entry(node, inl, list) | |
1da177e4 LT |
334 | if (node->ud->ne->nodeid == nodeid) |
335 | return node; | |
1da177e4 LT |
336 | |
337 | return NULL; | |
338 | } | |
339 | ||
d06c1dda SR |
340 | static int eth1394_new_node(struct eth1394_host_info *hi, |
341 | struct unit_directory *ud) | |
1da177e4 | 342 | { |
1da177e4 LT |
343 | struct eth1394_priv *priv; |
344 | struct eth1394_node_ref *new_node; | |
345 | struct eth1394_node_info *node_info; | |
346 | ||
5e7abccd | 347 | new_node = kmalloc(sizeof(*new_node), GFP_KERNEL); |
1da177e4 LT |
348 | if (!new_node) |
349 | return -ENOMEM; | |
350 | ||
5e7abccd | 351 | node_info = kmalloc(sizeof(*node_info), GFP_KERNEL); |
1da177e4 LT |
352 | if (!node_info) { |
353 | kfree(new_node); | |
354 | return -ENOMEM; | |
355 | } | |
356 | ||
357 | spin_lock_init(&node_info->pdg.lock); | |
358 | INIT_LIST_HEAD(&node_info->pdg.list); | |
359 | node_info->pdg.sz = 0; | |
6737231e | 360 | node_info->fifo = CSR1212_INVALID_ADDR_SPACE; |
1da177e4 | 361 | |
bab03059 | 362 | dev_set_drvdata(&ud->device, node_info); |
1da177e4 LT |
363 | new_node->ud = ud; |
364 | ||
365 | priv = netdev_priv(hi->dev); | |
366 | list_add_tail(&new_node->list, &priv->ip_node_list); | |
1da177e4 LT |
367 | return 0; |
368 | } | |
369 | ||
d06c1dda SR |
370 | static int eth1394_probe(struct device *dev) |
371 | { | |
372 | struct unit_directory *ud; | |
373 | struct eth1394_host_info *hi; | |
374 | ||
375 | ud = container_of(dev, struct unit_directory, device); | |
376 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
377 | if (!hi) | |
378 | return -ENOENT; | |
379 | ||
380 | return eth1394_new_node(hi, ud); | |
381 | } | |
382 | ||
1da177e4 LT |
383 | static int eth1394_remove(struct device *dev) |
384 | { | |
385 | struct unit_directory *ud; | |
386 | struct eth1394_host_info *hi; | |
387 | struct eth1394_priv *priv; | |
388 | struct eth1394_node_ref *old_node; | |
389 | struct eth1394_node_info *node_info; | |
390 | struct list_head *lh, *n; | |
391 | unsigned long flags; | |
392 | ||
393 | ud = container_of(dev, struct unit_directory, device); | |
394 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
395 | if (!hi) | |
396 | return -ENOENT; | |
397 | ||
398 | priv = netdev_priv(hi->dev); | |
399 | ||
400 | old_node = eth1394_find_node(&priv->ip_node_list, ud); | |
efbeccf1 SR |
401 | if (!old_node) |
402 | return 0; | |
1da177e4 | 403 | |
efbeccf1 SR |
404 | list_del(&old_node->list); |
405 | kfree(old_node); | |
1da177e4 | 406 | |
bab03059 | 407 | node_info = dev_get_drvdata(&ud->device); |
1da177e4 | 408 | |
efbeccf1 SR |
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 | spin_unlock_irqrestore(&node_info->pdg.lock, flags); | |
1da177e4 | 415 | |
efbeccf1 | 416 | kfree(node_info); |
bab03059 | 417 | dev_set_drvdata(&ud->device, NULL); |
1da177e4 LT |
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; | |
1da177e4 LT |
426 | |
427 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
428 | if (!hi) | |
429 | return -ENOENT; | |
430 | ||
431 | priv = netdev_priv(hi->dev); | |
1da177e4 | 432 | node = eth1394_find_node(&priv->ip_node_list, ud); |
efbeccf1 SR |
433 | if (node) |
434 | return 0; | |
1da177e4 | 435 | |
d06c1dda | 436 | return eth1394_new_node(hi, ud); |
1da177e4 LT |
437 | } |
438 | ||
c6409468 | 439 | static const struct ieee1394_device_id eth1394_id_table[] = { |
1da177e4 LT |
440 | { |
441 | .match_flags = (IEEE1394_MATCH_SPECIFIER_ID | | |
442 | IEEE1394_MATCH_VERSION), | |
443 | .specifier_id = ETHER1394_GASP_SPECIFIER_ID, | |
444 | .version = ETHER1394_GASP_VERSION, | |
445 | }, | |
446 | {} | |
447 | }; | |
448 | ||
449 | MODULE_DEVICE_TABLE(ieee1394, eth1394_id_table); | |
450 | ||
451 | static struct hpsb_protocol_driver eth1394_proto_driver = { | |
efbeccf1 | 452 | .name = driver_name, |
1da177e4 LT |
453 | .id_table = eth1394_id_table, |
454 | .update = eth1394_update, | |
455 | .driver = { | |
1da177e4 LT |
456 | .probe = eth1394_probe, |
457 | .remove = eth1394_remove, | |
458 | }, | |
459 | }; | |
460 | ||
efbeccf1 | 461 | static void ether1394_reset_priv(struct net_device *dev, int set_mtu) |
1da177e4 LT |
462 | { |
463 | unsigned long flags; | |
464 | int i; | |
465 | struct eth1394_priv *priv = netdev_priv(dev); | |
466 | struct hpsb_host *host = priv->host; | |
efbeccf1 | 467 | u64 guid = get_unaligned((u64 *)&(host->csr.rom->bus_info_data[3])); |
1da177e4 LT |
468 | int max_speed = IEEE1394_SPEED_MAX; |
469 | ||
efbeccf1 | 470 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 471 | |
027611b8 | 472 | memset(priv->ud_list, 0, sizeof(priv->ud_list)); |
1da177e4 LT |
473 | priv->bc_maxpayload = 512; |
474 | ||
475 | /* Determine speed limit */ | |
21b2c564 SR |
476 | /* FIXME: This is broken for nodes with link speed < PHY speed, |
477 | * and it is suboptimal for S200B...S800B hardware. | |
478 | * The result of nodemgr's speed probe should be used somehow. */ | |
479 | for (i = 0; i < host->node_count; i++) { | |
480 | /* take care of S100B...S400B PHY ports */ | |
481 | if (host->speed[i] == SELFID_SPEED_UNKNOWN) { | |
482 | max_speed = IEEE1394_SPEED_100; | |
483 | break; | |
484 | } | |
647dcb5f BC |
485 | if (max_speed > host->speed[i]) |
486 | max_speed = host->speed[i]; | |
21b2c564 | 487 | } |
1da177e4 LT |
488 | priv->bc_sspd = max_speed; |
489 | ||
1da177e4 | 490 | if (set_mtu) { |
17bab407 SR |
491 | /* Use the RFC 2734 default 1500 octets or the maximum payload |
492 | * as initial MTU */ | |
493 | dev->mtu = min(1500, ether1394_max_mtu(host)); | |
1da177e4 LT |
494 | |
495 | /* Set our hardware address while we're at it */ | |
c20e3945 DM |
496 | memcpy(dev->dev_addr, &guid, sizeof(u64)); |
497 | memset(dev->broadcast, 0xff, sizeof(u64)); | |
1da177e4 LT |
498 | } |
499 | ||
efbeccf1 | 500 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
501 | } |
502 | ||
3b04ddde SH |
503 | static const struct header_ops ether1394_header_ops = { |
504 | .create = ether1394_header, | |
505 | .rebuild = ether1394_rebuild_header, | |
506 | .cache = ether1394_header_cache, | |
507 | .cache_update = ether1394_header_cache_update, | |
508 | .parse = ether1394_header_parse, | |
509 | }; | |
510 | ||
79994c99 SH |
511 | static const struct net_device_ops ether1394_netdev_ops = { |
512 | .ndo_open = ether1394_open, | |
513 | .ndo_stop = ether1394_stop, | |
514 | .ndo_start_xmit = ether1394_tx, | |
79994c99 SH |
515 | .ndo_tx_timeout = ether1394_tx_timeout, |
516 | .ndo_change_mtu = ether1394_change_mtu, | |
517 | }; | |
518 | ||
efbeccf1 | 519 | static void ether1394_init_dev(struct net_device *dev) |
1da177e4 | 520 | { |
1da177e4 | 521 | |
3b04ddde | 522 | dev->header_ops = ðer1394_header_ops; |
79994c99 | 523 | dev->netdev_ops = ðer1394_netdev_ops; |
01590d20 | 524 | |
1da177e4 LT |
525 | dev->watchdog_timeo = ETHER1394_TIMEOUT; |
526 | dev->flags = IFF_BROADCAST | IFF_MULTICAST; | |
527 | dev->features = NETIF_F_HIGHDMA; | |
528 | dev->addr_len = ETH1394_ALEN; | |
529 | dev->hard_header_len = ETH1394_HLEN; | |
530 | dev->type = ARPHRD_IEEE1394; | |
531 | ||
01590d20 SR |
532 | /* FIXME: This value was copied from ether_setup(). Is it too much? */ |
533 | dev->tx_queue_len = 1000; | |
1da177e4 LT |
534 | } |
535 | ||
7a97bc03 SR |
536 | /* |
537 | * Wake the queue up after commonly encountered transmit failure conditions are | |
538 | * hopefully over. Currently only tlabel exhaustion is accounted for. | |
539 | */ | |
540 | static void ether1394_wake_queue(struct work_struct *work) | |
541 | { | |
542 | struct eth1394_priv *priv; | |
543 | struct hpsb_packet *packet; | |
544 | ||
545 | priv = container_of(work, struct eth1394_priv, wake); | |
546 | packet = hpsb_alloc_packet(0); | |
547 | ||
548 | /* This is really bad, but unjam the queue anyway. */ | |
549 | if (!packet) | |
550 | goto out; | |
551 | ||
552 | packet->host = priv->host; | |
553 | packet->node_id = priv->wake_node; | |
554 | /* | |
555 | * A transaction label is all we really want. If we get one, it almost | |
556 | * always means we can get a lot more because the ieee1394 core recycled | |
557 | * a whole batch of tlabels, at last. | |
558 | */ | |
559 | if (hpsb_get_tlabel(packet) == 0) | |
560 | hpsb_free_tlabel(packet); | |
561 | ||
562 | hpsb_free_packet(packet); | |
563 | out: | |
564 | netif_wake_queue(priv->wake_dev); | |
565 | } | |
566 | ||
1da177e4 LT |
567 | /* |
568 | * This function is called every time a card is found. It is generally called | |
569 | * when the module is installed. This is where we add all of our ethernet | |
570 | * devices. One for each host. | |
571 | */ | |
efbeccf1 | 572 | static void ether1394_add_host(struct hpsb_host *host) |
1da177e4 LT |
573 | { |
574 | struct eth1394_host_info *hi = NULL; | |
575 | struct net_device *dev = NULL; | |
576 | struct eth1394_priv *priv; | |
1da177e4 LT |
577 | u64 fifo_addr; |
578 | ||
70093cfd SR |
579 | if (hpsb_config_rom_ip1394_add(host) != 0) { |
580 | ETH1394_PRINT_G(KERN_ERR, "Can't add IP-over-1394 ROM entry\n"); | |
1da177e4 | 581 | return; |
70093cfd | 582 | } |
1da177e4 | 583 | |
6737231e BC |
584 | fifo_addr = hpsb_allocate_and_register_addrspace( |
585 | ð1394_highlevel, host, &addr_ops, | |
586 | ETHER1394_REGION_ADDR_LEN, ETHER1394_REGION_ADDR_LEN, | |
587 | CSR1212_INVALID_ADDR_SPACE, CSR1212_INVALID_ADDR_SPACE); | |
157188cb SR |
588 | if (fifo_addr == CSR1212_INVALID_ADDR_SPACE) { |
589 | ETH1394_PRINT_G(KERN_ERR, "Cannot register CSR space\n"); | |
70093cfd | 590 | hpsb_config_rom_ip1394_remove(host); |
157188cb SR |
591 | return; |
592 | } | |
1da177e4 | 593 | |
01590d20 | 594 | dev = alloc_netdev(sizeof(*priv), "eth%d", ether1394_init_dev); |
1da177e4 | 595 | if (dev == NULL) { |
5009d269 | 596 | ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); |
1da177e4 | 597 | goto out; |
efbeccf1 | 598 | } |
1da177e4 | 599 | |
8e4dc400 | 600 | SET_NETDEV_DEV(dev, &host->device); |
1da177e4 LT |
601 | |
602 | priv = netdev_priv(dev); | |
1da177e4 | 603 | INIT_LIST_HEAD(&priv->ip_node_list); |
1da177e4 LT |
604 | spin_lock_init(&priv->lock); |
605 | priv->host = host; | |
606 | priv->local_fifo = fifo_addr; | |
7a97bc03 SR |
607 | INIT_WORK(&priv->wake, ether1394_wake_queue); |
608 | priv->wake_dev = dev; | |
1da177e4 LT |
609 | |
610 | hi = hpsb_create_hostinfo(ð1394_highlevel, host, sizeof(*hi)); | |
1da177e4 | 611 | if (hi == NULL) { |
5009d269 | 612 | ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); |
1da177e4 | 613 | goto out; |
efbeccf1 | 614 | } |
1da177e4 | 615 | |
01590d20 | 616 | ether1394_reset_priv(dev, 1); |
1da177e4 | 617 | |
5009d269 SR |
618 | if (register_netdev(dev)) { |
619 | ETH1394_PRINT_G(KERN_ERR, "Cannot register the driver\n"); | |
1da177e4 LT |
620 | goto out; |
621 | } | |
622 | ||
5009d269 SR |
623 | ETH1394_PRINT(KERN_INFO, dev->name, "IPv4 over IEEE 1394 (fw-host%d)\n", |
624 | host->id); | |
1da177e4 LT |
625 | |
626 | hi->host = host; | |
627 | hi->dev = dev; | |
628 | ||
629 | /* Ignore validity in hopes that it will be set in the future. It'll | |
630 | * be checked when the eth device is opened. */ | |
631 | priv->broadcast_channel = host->csr.broadcast_channel & 0x3f; | |
632 | ||
5009d269 | 633 | ether1394_recv_init(priv); |
1da177e4 | 634 | return; |
1da177e4 | 635 | out: |
157188cb | 636 | if (dev) |
1da177e4 LT |
637 | free_netdev(dev); |
638 | if (hi) | |
639 | hpsb_destroy_hostinfo(ð1394_highlevel, host); | |
157188cb | 640 | hpsb_unregister_addrspace(ð1394_highlevel, host, fifo_addr); |
70093cfd | 641 | hpsb_config_rom_ip1394_remove(host); |
1da177e4 LT |
642 | } |
643 | ||
644 | /* Remove a card from our list */ | |
efbeccf1 | 645 | static void ether1394_remove_host(struct hpsb_host *host) |
1da177e4 LT |
646 | { |
647 | struct eth1394_host_info *hi; | |
2cd556ae | 648 | struct eth1394_priv *priv; |
1da177e4 LT |
649 | |
650 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
2cd556ae SR |
651 | if (!hi) |
652 | return; | |
653 | priv = netdev_priv(hi->dev); | |
654 | hpsb_unregister_addrspace(ð1394_highlevel, host, priv->local_fifo); | |
70093cfd | 655 | hpsb_config_rom_ip1394_remove(host); |
2cd556ae SR |
656 | if (priv->iso) |
657 | hpsb_iso_shutdown(priv->iso); | |
658 | unregister_netdev(hi->dev); | |
659 | free_netdev(hi->dev); | |
1da177e4 LT |
660 | } |
661 | ||
efbeccf1 SR |
662 | /* A bus reset happened */ |
663 | static void ether1394_host_reset(struct hpsb_host *host) | |
1da177e4 LT |
664 | { |
665 | struct eth1394_host_info *hi; | |
666 | struct eth1394_priv *priv; | |
667 | struct net_device *dev; | |
668 | struct list_head *lh, *n; | |
669 | struct eth1394_node_ref *node; | |
670 | struct eth1394_node_info *node_info; | |
671 | unsigned long flags; | |
672 | ||
673 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
674 | ||
675 | /* This can happen for hosts that we don't use */ | |
2cd556ae | 676 | if (!hi) |
1da177e4 LT |
677 | return; |
678 | ||
679 | dev = hi->dev; | |
efbeccf1 | 680 | priv = netdev_priv(dev); |
1da177e4 | 681 | |
efbeccf1 SR |
682 | /* Reset our private host data, but not our MTU */ |
683 | netif_stop_queue(dev); | |
684 | ether1394_reset_priv(dev, 0); | |
1da177e4 LT |
685 | |
686 | list_for_each_entry(node, &priv->ip_node_list, list) { | |
bab03059 | 687 | node_info = dev_get_drvdata(&node->ud->device); |
1da177e4 LT |
688 | |
689 | spin_lock_irqsave(&node_info->pdg.lock, flags); | |
690 | ||
efbeccf1 | 691 | list_for_each_safe(lh, n, &node_info->pdg.list) |
1da177e4 | 692 | purge_partial_datagram(lh); |
1da177e4 LT |
693 | |
694 | INIT_LIST_HEAD(&(node_info->pdg.list)); | |
695 | node_info->pdg.sz = 0; | |
696 | ||
697 | spin_unlock_irqrestore(&node_info->pdg.lock, flags); | |
698 | } | |
699 | ||
efbeccf1 | 700 | netif_wake_queue(dev); |
1da177e4 LT |
701 | } |
702 | ||
703 | /****************************************** | |
704 | * HW Header net device functions | |
705 | ******************************************/ | |
706 | /* These functions have been adapted from net/ethernet/eth.c */ | |
707 | ||
1da177e4 LT |
708 | /* Create a fake MAC header for an arbitrary protocol layer. |
709 | * saddr=NULL means use device source address | |
710 | * daddr=NULL means leave destination address (eg unresolved arp). */ | |
711 | static int ether1394_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
712 | unsigned short type, const void *daddr, |
713 | const void *saddr, unsigned len) | |
1da177e4 | 714 | { |
efbeccf1 SR |
715 | struct eth1394hdr *eth = |
716 | (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN); | |
1da177e4 LT |
717 | |
718 | eth->h_proto = htons(type); | |
719 | ||
efbeccf1 | 720 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) { |
1da177e4 | 721 | memset(eth->h_dest, 0, dev->addr_len); |
efbeccf1 | 722 | return dev->hard_header_len; |
1da177e4 LT |
723 | } |
724 | ||
725 | if (daddr) { | |
efbeccf1 | 726 | memcpy(eth->h_dest, daddr, dev->addr_len); |
1da177e4 LT |
727 | return dev->hard_header_len; |
728 | } | |
729 | ||
730 | return -dev->hard_header_len; | |
1da177e4 LT |
731 | } |
732 | ||
1da177e4 LT |
733 | /* Rebuild the faked MAC header. This is called after an ARP |
734 | * (or in future other address resolution) has completed on this | |
735 | * sk_buff. We now let ARP fill in the other fields. | |
736 | * | |
737 | * This routine CANNOT use cached dst->neigh! | |
738 | * Really, it is used only when dst->neigh is wrong. | |
739 | */ | |
740 | static int ether1394_rebuild_header(struct sk_buff *skb) | |
741 | { | |
742 | struct eth1394hdr *eth = (struct eth1394hdr *)skb->data; | |
1da177e4 | 743 | |
599bba96 | 744 | if (eth->h_proto == htons(ETH_P_IP)) |
efbeccf1 | 745 | return arp_find((unsigned char *)ð->h_dest, skb); |
1da177e4 | 746 | |
599bba96 SR |
747 | ETH1394_PRINT(KERN_DEBUG, skb->dev->name, |
748 | "unable to resolve type %04x addresses\n", | |
749 | ntohs(eth->h_proto)); | |
1da177e4 LT |
750 | return 0; |
751 | } | |
752 | ||
b95cce35 SH |
753 | static int ether1394_header_parse(const struct sk_buff *skb, |
754 | unsigned char *haddr) | |
1da177e4 | 755 | { |
b95cce35 | 756 | memcpy(haddr, skb->dev->dev_addr, ETH1394_ALEN); |
1da177e4 LT |
757 | return ETH1394_ALEN; |
758 | } | |
759 | ||
3b04ddde SH |
760 | static int ether1394_header_cache(const struct neighbour *neigh, |
761 | struct hh_cache *hh) | |
1da177e4 | 762 | { |
faf26bcc | 763 | __be16 type = hh->hh_type; |
1da177e4 | 764 | struct net_device *dev = neigh->dev; |
efbeccf1 SR |
765 | struct eth1394hdr *eth = |
766 | (struct eth1394hdr *)((u8 *)hh->hh_data + 16 - ETH1394_HLEN); | |
1da177e4 | 767 | |
7136b807 | 768 | if (type == htons(ETH_P_802_3)) |
1da177e4 | 769 | return -1; |
1da177e4 LT |
770 | |
771 | eth->h_proto = type; | |
772 | memcpy(eth->h_dest, neigh->ha, dev->addr_len); | |
773 | ||
774 | hh->hh_len = ETH1394_HLEN; | |
775 | return 0; | |
776 | } | |
777 | ||
778 | /* Called by Address Resolution module to notify changes in address. */ | |
779 | static void ether1394_header_cache_update(struct hh_cache *hh, | |
3b04ddde SH |
780 | const struct net_device *dev, |
781 | const unsigned char * haddr) | |
1da177e4 | 782 | { |
efbeccf1 | 783 | memcpy((u8 *)hh->hh_data + 16 - ETH1394_HLEN, haddr, dev->addr_len); |
1da177e4 LT |
784 | } |
785 | ||
1da177e4 LT |
786 | /****************************************** |
787 | * Datagram reception code | |
788 | ******************************************/ | |
789 | ||
790 | /* Copied from net/ethernet/eth.c */ | |
faf26bcc | 791 | static __be16 ether1394_type_trans(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
792 | { |
793 | struct eth1394hdr *eth; | |
794 | unsigned char *rawp; | |
795 | ||
459a98ed | 796 | skb_reset_mac_header(skb); |
efbeccf1 | 797 | skb_pull(skb, ETH1394_HLEN); |
1da177e4 LT |
798 | eth = eth1394_hdr(skb); |
799 | ||
800 | if (*eth->h_dest & 1) { | |
efbeccf1 | 801 | if (memcmp(eth->h_dest, dev->broadcast, dev->addr_len) == 0) |
1da177e4 LT |
802 | skb->pkt_type = PACKET_BROADCAST; |
803 | #if 0 | |
804 | else | |
805 | skb->pkt_type = PACKET_MULTICAST; | |
806 | #endif | |
807 | } else { | |
808 | if (memcmp(eth->h_dest, dev->dev_addr, dev->addr_len)) | |
809 | skb->pkt_type = PACKET_OTHERHOST; | |
efbeccf1 | 810 | } |
1da177e4 | 811 | |
efbeccf1 | 812 | if (ntohs(eth->h_proto) >= 1536) |
1da177e4 LT |
813 | return eth->h_proto; |
814 | ||
815 | rawp = skb->data; | |
816 | ||
efbeccf1 SR |
817 | if (*(unsigned short *)rawp == 0xFFFF) |
818 | return htons(ETH_P_802_3); | |
1da177e4 | 819 | |
efbeccf1 | 820 | return htons(ETH_P_802_2); |
1da177e4 LT |
821 | } |
822 | ||
823 | /* Parse an encapsulated IP1394 header into an ethernet frame packet. | |
824 | * We also perform ARP translation here, if need be. */ | |
faf26bcc | 825 | static __be16 ether1394_parse_encap(struct sk_buff *skb, struct net_device *dev, |
e00f04a7 | 826 | nodeid_t srcid, nodeid_t destid, |
faf26bcc | 827 | __be16 ether_type) |
1da177e4 LT |
828 | { |
829 | struct eth1394_priv *priv = netdev_priv(dev); | |
faf26bcc HH |
830 | __be64 dest_hw; |
831 | __be16 ret = 0; | |
1da177e4 | 832 | |
efbeccf1 | 833 | /* Setup our hw addresses. We use these to build the ethernet header. */ |
1da177e4 | 834 | if (destid == (LOCAL_BUS | ALL_NODES)) |
faf26bcc | 835 | dest_hw = ~cpu_to_be64(0); /* broadcast */ |
1da177e4 | 836 | else |
efbeccf1 | 837 | dest_hw = cpu_to_be64((u64)priv->host->csr.guid_hi << 32 | |
1da177e4 LT |
838 | priv->host->csr.guid_lo); |
839 | ||
840 | /* If this is an ARP packet, convert it. First, we want to make | |
841 | * use of some of the fields, since they tell us a little bit | |
842 | * about the sending machine. */ | |
7136b807 | 843 | if (ether_type == htons(ETH_P_ARP)) { |
efbeccf1 | 844 | struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data; |
1da177e4 LT |
845 | struct arphdr *arp = (struct arphdr *)skb->data; |
846 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
847 | u64 fifo_addr = (u64)ntohs(arp1394->fifo_hi) << 32 | | |
efbeccf1 | 848 | ntohl(arp1394->fifo_lo); |
1da177e4 LT |
849 | u8 max_rec = min(priv->host->csr.max_rec, |
850 | (u8)(arp1394->max_rec)); | |
851 | int sspd = arp1394->sspd; | |
852 | u16 maxpayload; | |
853 | struct eth1394_node_ref *node; | |
854 | struct eth1394_node_info *node_info; | |
c20e3945 | 855 | __be64 guid; |
1da177e4 LT |
856 | |
857 | /* Sanity check. MacOSX seems to be sending us 131 in this | |
858 | * field (atleast on my Panther G5). Not sure why. */ | |
859 | if (sspd > 5 || sspd < 0) | |
860 | sspd = 0; | |
861 | ||
efbeccf1 SR |
862 | maxpayload = min(eth1394_speedto_maxpayload[sspd], |
863 | (u16)(1 << (max_rec + 1))); | |
1da177e4 | 864 | |
c20e3945 | 865 | guid = get_unaligned(&arp1394->s_uniq_id); |
1da177e4 | 866 | node = eth1394_find_node_guid(&priv->ip_node_list, |
c20e3945 | 867 | be64_to_cpu(guid)); |
efbeccf1 | 868 | if (!node) |
faf26bcc | 869 | return cpu_to_be16(0); |
1da177e4 | 870 | |
bab03059 | 871 | node_info = dev_get_drvdata(&node->ud->device); |
1da177e4 LT |
872 | |
873 | /* Update our speed/payload/fifo_offset table */ | |
874 | node_info->maxpayload = maxpayload; | |
875 | node_info->sspd = sspd; | |
876 | node_info->fifo = fifo_addr; | |
877 | ||
878 | /* Now that we're done with the 1394 specific stuff, we'll | |
879 | * need to alter some of the data. Believe it or not, all | |
880 | * that needs to be done is sender_IP_address needs to be | |
881 | * moved, the destination hardware address get stuffed | |
882 | * in and the hardware address length set to 8. | |
883 | * | |
884 | * IMPORTANT: The code below overwrites 1394 specific data | |
885 | * needed above so keep the munging of the data for the | |
886 | * higher level IP stack last. */ | |
887 | ||
888 | arp->ar_hln = 8; | |
889 | arp_ptr += arp->ar_hln; /* skip over sender unique id */ | |
efbeccf1 | 890 | *(u32 *)arp_ptr = arp1394->sip; /* move sender IP addr */ |
1da177e4 LT |
891 | arp_ptr += arp->ar_pln; /* skip over sender IP addr */ |
892 | ||
02f4213f | 893 | if (arp->ar_op == htons(ARPOP_REQUEST)) |
c20e3945 | 894 | memset(arp_ptr, 0, sizeof(u64)); |
1da177e4 | 895 | else |
c20e3945 | 896 | memcpy(arp_ptr, dev->dev_addr, sizeof(u64)); |
1da177e4 LT |
897 | } |
898 | ||
899 | /* Now add the ethernet header. */ | |
3b04ddde SH |
900 | if (dev_hard_header(skb, dev, ntohs(ether_type), &dest_hw, NULL, |
901 | skb->len) >= 0) | |
1da177e4 LT |
902 | ret = ether1394_type_trans(skb, dev); |
903 | ||
904 | return ret; | |
905 | } | |
906 | ||
e00f04a7 | 907 | static int fragment_overlap(struct list_head *frag_list, int offset, int len) |
1da177e4 LT |
908 | { |
909 | struct fragment_info *fi; | |
2e2173df | 910 | int end = offset + len; |
1da177e4 | 911 | |
2e2173df SR |
912 | list_for_each_entry(fi, frag_list, list) |
913 | if (offset < fi->offset + fi->len && end > fi->offset) | |
1da177e4 | 914 | return 1; |
2e2173df | 915 | |
1da177e4 LT |
916 | return 0; |
917 | } | |
918 | ||
e00f04a7 | 919 | static struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl) |
1da177e4 LT |
920 | { |
921 | struct partial_datagram *pd; | |
922 | ||
efbeccf1 | 923 | list_for_each_entry(pd, pdgl, list) |
1da177e4 LT |
924 | if (pd->dgl == dgl) |
925 | return &pd->list; | |
efbeccf1 | 926 | |
1da177e4 LT |
927 | return NULL; |
928 | } | |
929 | ||
930 | /* Assumes that new fragment does not overlap any existing fragments */ | |
e00f04a7 | 931 | static int new_fragment(struct list_head *frag_info, int offset, int len) |
1da177e4 LT |
932 | { |
933 | struct list_head *lh; | |
934 | struct fragment_info *fi, *fi2, *new; | |
935 | ||
936 | list_for_each(lh, frag_info) { | |
937 | fi = list_entry(lh, struct fragment_info, list); | |
efbeccf1 | 938 | if (fi->offset + fi->len == offset) { |
1da177e4 LT |
939 | /* The new fragment can be tacked on to the end */ |
940 | fi->len += len; | |
941 | /* Did the new fragment plug a hole? */ | |
942 | fi2 = list_entry(lh->next, struct fragment_info, list); | |
efbeccf1 | 943 | if (fi->offset + fi->len == fi2->offset) { |
1da177e4 LT |
944 | /* glue fragments together */ |
945 | fi->len += fi2->len; | |
946 | list_del(lh->next); | |
947 | kfree(fi2); | |
948 | } | |
949 | return 0; | |
efbeccf1 | 950 | } else if (offset + len == fi->offset) { |
1da177e4 LT |
951 | /* The new fragment can be tacked on to the beginning */ |
952 | fi->offset = offset; | |
953 | fi->len += len; | |
954 | /* Did the new fragment plug a hole? */ | |
955 | fi2 = list_entry(lh->prev, struct fragment_info, list); | |
efbeccf1 | 956 | if (fi2->offset + fi2->len == fi->offset) { |
1da177e4 LT |
957 | /* glue fragments together */ |
958 | fi2->len += fi->len; | |
959 | list_del(lh); | |
960 | kfree(fi); | |
961 | } | |
962 | return 0; | |
efbeccf1 | 963 | } else if (offset > fi->offset + fi->len) { |
1da177e4 | 964 | break; |
efbeccf1 | 965 | } else if (offset + len < fi->offset) { |
1da177e4 LT |
966 | lh = lh->prev; |
967 | break; | |
968 | } | |
969 | } | |
970 | ||
8551158a | 971 | new = kmalloc(sizeof(*new), GFP_ATOMIC); |
1da177e4 LT |
972 | if (!new) |
973 | return -ENOMEM; | |
974 | ||
975 | new->offset = offset; | |
976 | new->len = len; | |
977 | ||
978 | list_add(&new->list, lh); | |
1da177e4 LT |
979 | return 0; |
980 | } | |
981 | ||
e00f04a7 SR |
982 | static int new_partial_datagram(struct net_device *dev, struct list_head *pdgl, |
983 | int dgl, int dg_size, char *frag_buf, | |
984 | int frag_off, int frag_len) | |
1da177e4 LT |
985 | { |
986 | struct partial_datagram *new; | |
987 | ||
8551158a | 988 | new = kmalloc(sizeof(*new), GFP_ATOMIC); |
1da177e4 LT |
989 | if (!new) |
990 | return -ENOMEM; | |
991 | ||
992 | INIT_LIST_HEAD(&new->frag_info); | |
993 | ||
994 | if (new_fragment(&new->frag_info, frag_off, frag_len) < 0) { | |
995 | kfree(new); | |
996 | return -ENOMEM; | |
997 | } | |
998 | ||
999 | new->dgl = dgl; | |
1000 | new->dg_size = dg_size; | |
1001 | ||
1002 | new->skb = dev_alloc_skb(dg_size + dev->hard_header_len + 15); | |
1003 | if (!new->skb) { | |
1004 | struct fragment_info *fi = list_entry(new->frag_info.next, | |
1005 | struct fragment_info, | |
1006 | list); | |
1007 | kfree(fi); | |
1008 | kfree(new); | |
1009 | return -ENOMEM; | |
1010 | } | |
1011 | ||
1012 | skb_reserve(new->skb, (dev->hard_header_len + 15) & ~15); | |
1013 | new->pbuf = skb_put(new->skb, dg_size); | |
1014 | memcpy(new->pbuf + frag_off, frag_buf, frag_len); | |
1015 | ||
1016 | list_add(&new->list, pdgl); | |
1da177e4 LT |
1017 | return 0; |
1018 | } | |
1019 | ||
e00f04a7 SR |
1020 | static int update_partial_datagram(struct list_head *pdgl, struct list_head *lh, |
1021 | char *frag_buf, int frag_off, int frag_len) | |
1da177e4 | 1022 | { |
efbeccf1 SR |
1023 | struct partial_datagram *pd = |
1024 | list_entry(lh, struct partial_datagram, list); | |
1da177e4 | 1025 | |
efbeccf1 | 1026 | if (new_fragment(&pd->frag_info, frag_off, frag_len) < 0) |
1da177e4 | 1027 | return -ENOMEM; |
1da177e4 LT |
1028 | |
1029 | memcpy(pd->pbuf + frag_off, frag_buf, frag_len); | |
1030 | ||
1031 | /* Move list entry to beginnig of list so that oldest partial | |
1032 | * datagrams percolate to the end of the list */ | |
179e0917 | 1033 | list_move(lh, pdgl); |
1da177e4 LT |
1034 | return 0; |
1035 | } | |
1036 | ||
e00f04a7 | 1037 | static int is_datagram_complete(struct list_head *lh, int dg_size) |
1da177e4 | 1038 | { |
e00f04a7 SR |
1039 | struct partial_datagram *pd; |
1040 | struct fragment_info *fi; | |
1041 | ||
1042 | pd = list_entry(lh, struct partial_datagram, list); | |
1043 | fi = list_entry(pd->frag_info.next, struct fragment_info, list); | |
1da177e4 LT |
1044 | |
1045 | return (fi->len == dg_size); | |
1046 | } | |
1047 | ||
1048 | /* Packet reception. We convert the IP1394 encapsulation header to an | |
1049 | * ethernet header, and fill it with some of our other fields. This is | |
1050 | * an incoming packet from the 1394 bus. */ | |
1051 | static int ether1394_data_handler(struct net_device *dev, int srcid, int destid, | |
1052 | char *buf, int len) | |
1053 | { | |
1054 | struct sk_buff *skb; | |
1055 | unsigned long flags; | |
1056 | struct eth1394_priv *priv = netdev_priv(dev); | |
1057 | union eth1394_hdr *hdr = (union eth1394_hdr *)buf; | |
faf26bcc | 1058 | __be16 ether_type = cpu_to_be16(0); /* initialized to clear warning */ |
1da177e4 LT |
1059 | int hdr_len; |
1060 | struct unit_directory *ud = priv->ud_list[NODEID_TO_NODE(srcid)]; | |
1061 | struct eth1394_node_info *node_info; | |
1062 | ||
1063 | if (!ud) { | |
1064 | struct eth1394_node_ref *node; | |
1065 | node = eth1394_find_node_nodeid(&priv->ip_node_list, srcid); | |
09939871 | 1066 | if (unlikely(!node)) { |
1da177e4 LT |
1067 | HPSB_PRINT(KERN_ERR, "ether1394 rx: sender nodeid " |
1068 | "lookup failure: " NODE_BUS_FMT, | |
1069 | NODE_BUS_ARGS(priv->host, srcid)); | |
92dc8cc3 | 1070 | dev->stats.rx_dropped++; |
1da177e4 LT |
1071 | return -1; |
1072 | } | |
1073 | ud = node->ud; | |
1074 | ||
1075 | priv->ud_list[NODEID_TO_NODE(srcid)] = ud; | |
1076 | } | |
1077 | ||
bab03059 | 1078 | node_info = dev_get_drvdata(&ud->device); |
1da177e4 LT |
1079 | |
1080 | /* First, did we receive a fragmented or unfragmented datagram? */ | |
1081 | hdr->words.word1 = ntohs(hdr->words.word1); | |
1082 | ||
1083 | hdr_len = hdr_type_len[hdr->common.lf]; | |
1084 | ||
1085 | if (hdr->common.lf == ETH1394_HDR_LF_UF) { | |
1086 | /* An unfragmented datagram has been received by the ieee1394 | |
1087 | * bus. Build an skbuff around it so we can pass it to the | |
1088 | * high level network layer. */ | |
1089 | ||
1090 | skb = dev_alloc_skb(len + dev->hard_header_len + 15); | |
09939871 | 1091 | if (unlikely(!skb)) { |
5009d269 | 1092 | ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); |
92dc8cc3 | 1093 | dev->stats.rx_dropped++; |
1da177e4 LT |
1094 | return -1; |
1095 | } | |
1096 | skb_reserve(skb, (dev->hard_header_len + 15) & ~15); | |
efbeccf1 SR |
1097 | memcpy(skb_put(skb, len - hdr_len), buf + hdr_len, |
1098 | len - hdr_len); | |
1da177e4 LT |
1099 | ether_type = hdr->uf.ether_type; |
1100 | } else { | |
1101 | /* A datagram fragment has been received, now the fun begins. */ | |
1102 | ||
1103 | struct list_head *pdgl, *lh; | |
1104 | struct partial_datagram *pd; | |
1105 | int fg_off; | |
1106 | int fg_len = len - hdr_len; | |
1107 | int dg_size; | |
1108 | int dgl; | |
1109 | int retval; | |
1110 | struct pdg_list *pdg = &(node_info->pdg); | |
1111 | ||
1112 | hdr->words.word3 = ntohs(hdr->words.word3); | |
1113 | /* The 4th header word is reserved so no need to do ntohs() */ | |
1114 | ||
1115 | if (hdr->common.lf == ETH1394_HDR_LF_FF) { | |
1116 | ether_type = hdr->ff.ether_type; | |
1117 | dgl = hdr->ff.dgl; | |
1118 | dg_size = hdr->ff.dg_size + 1; | |
1119 | fg_off = 0; | |
1120 | } else { | |
1121 | hdr->words.word2 = ntohs(hdr->words.word2); | |
1122 | dgl = hdr->sf.dgl; | |
1123 | dg_size = hdr->sf.dg_size + 1; | |
1124 | fg_off = hdr->sf.fg_off; | |
1125 | } | |
1126 | spin_lock_irqsave(&pdg->lock, flags); | |
1127 | ||
1128 | pdgl = &(pdg->list); | |
1129 | lh = find_partial_datagram(pdgl, dgl); | |
1130 | ||
1131 | if (lh == NULL) { | |
1132 | while (pdg->sz >= max_partial_datagrams) { | |
1133 | /* remove the oldest */ | |
1134 | purge_partial_datagram(pdgl->prev); | |
1135 | pdg->sz--; | |
1136 | } | |
1137 | ||
1138 | retval = new_partial_datagram(dev, pdgl, dgl, dg_size, | |
1139 | buf + hdr_len, fg_off, | |
1140 | fg_len); | |
1141 | if (retval < 0) { | |
1142 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1143 | goto bad_proto; | |
1144 | } | |
1145 | pdg->sz++; | |
1146 | lh = find_partial_datagram(pdgl, dgl); | |
1147 | } else { | |
1da177e4 LT |
1148 | pd = list_entry(lh, struct partial_datagram, list); |
1149 | ||
1150 | if (fragment_overlap(&pd->frag_info, fg_off, fg_len)) { | |
1151 | /* Overlapping fragments, obliterate old | |
1152 | * datagram and start new one. */ | |
1153 | purge_partial_datagram(lh); | |
1154 | retval = new_partial_datagram(dev, pdgl, dgl, | |
1155 | dg_size, | |
1156 | buf + hdr_len, | |
1157 | fg_off, fg_len); | |
1158 | if (retval < 0) { | |
1159 | pdg->sz--; | |
1160 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1161 | goto bad_proto; | |
1162 | } | |
1163 | } else { | |
1164 | retval = update_partial_datagram(pdgl, lh, | |
1165 | buf + hdr_len, | |
1166 | fg_off, fg_len); | |
1167 | if (retval < 0) { | |
1168 | /* Couldn't save off fragment anyway | |
1169 | * so might as well obliterate the | |
1170 | * datagram now. */ | |
1171 | purge_partial_datagram(lh); | |
1172 | pdg->sz--; | |
1173 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1174 | goto bad_proto; | |
1175 | } | |
1176 | } /* fragment overlap */ | |
1177 | } /* new datagram or add to existing one */ | |
1178 | ||
1179 | pd = list_entry(lh, struct partial_datagram, list); | |
1180 | ||
efbeccf1 | 1181 | if (hdr->common.lf == ETH1394_HDR_LF_FF) |
1da177e4 | 1182 | pd->ether_type = ether_type; |
1da177e4 LT |
1183 | |
1184 | if (is_datagram_complete(lh, dg_size)) { | |
1185 | ether_type = pd->ether_type; | |
1186 | pdg->sz--; | |
1187 | skb = skb_get(pd->skb); | |
1188 | purge_partial_datagram(lh); | |
1189 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1190 | } else { | |
1191 | /* Datagram is not complete, we're done for the | |
1192 | * moment. */ | |
1193 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1194 | return 0; | |
1195 | } | |
1196 | } /* unframgented datagram or fragmented one */ | |
1197 | ||
1198 | /* Write metadata, and then pass to the receive level */ | |
1199 | skb->dev = dev; | |
1200 | skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */ | |
1201 | ||
1202 | /* Parse the encapsulation header. This actually does the job of | |
1203 | * converting to an ethernet frame header, aswell as arp | |
1204 | * conversion if needed. ARP conversion is easier in this | |
1205 | * direction, since we are using ethernet as our backend. */ | |
1206 | skb->protocol = ether1394_parse_encap(skb, dev, srcid, destid, | |
1207 | ether_type); | |
1208 | ||
1da177e4 | 1209 | spin_lock_irqsave(&priv->lock, flags); |
efbeccf1 | 1210 | |
1da177e4 | 1211 | if (!skb->protocol) { |
92dc8cc3 SH |
1212 | dev->stats.rx_errors++; |
1213 | dev->stats.rx_dropped++; | |
1da177e4 | 1214 | dev_kfree_skb_any(skb); |
661afcae | 1215 | } else if (netif_rx(skb) == NET_RX_DROP) { |
92dc8cc3 SH |
1216 | dev->stats.rx_errors++; |
1217 | dev->stats.rx_dropped++; | |
661afcae | 1218 | } else { |
92dc8cc3 SH |
1219 | dev->stats.rx_packets++; |
1220 | dev->stats.rx_bytes += skb->len; | |
1da177e4 LT |
1221 | } |
1222 | ||
661afcae | 1223 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
1224 | |
1225 | bad_proto: | |
1226 | if (netif_queue_stopped(dev)) | |
1227 | netif_wake_queue(dev); | |
1da177e4 | 1228 | |
1da177e4 LT |
1229 | return 0; |
1230 | } | |
1231 | ||
1232 | static int ether1394_write(struct hpsb_host *host, int srcid, int destid, | |
1233 | quadlet_t *data, u64 addr, size_t len, u16 flags) | |
1234 | { | |
1235 | struct eth1394_host_info *hi; | |
1236 | ||
1237 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
09939871 | 1238 | if (unlikely(!hi)) { |
5009d269 SR |
1239 | ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n", |
1240 | host->id); | |
1da177e4 LT |
1241 | return RCODE_ADDRESS_ERROR; |
1242 | } | |
1243 | ||
1244 | if (ether1394_data_handler(hi->dev, srcid, destid, (char*)data, len)) | |
1245 | return RCODE_ADDRESS_ERROR; | |
1246 | else | |
1247 | return RCODE_COMPLETE; | |
1248 | } | |
1249 | ||
1250 | static void ether1394_iso(struct hpsb_iso *iso) | |
1251 | { | |
faf26bcc | 1252 | __be32 *data; |
1da177e4 LT |
1253 | char *buf; |
1254 | struct eth1394_host_info *hi; | |
1255 | struct net_device *dev; | |
1da177e4 LT |
1256 | unsigned int len; |
1257 | u32 specifier_id; | |
1258 | u16 source_id; | |
1259 | int i; | |
1260 | int nready; | |
1261 | ||
1262 | hi = hpsb_get_hostinfo(ð1394_highlevel, iso->host); | |
09939871 | 1263 | if (unlikely(!hi)) { |
5009d269 SR |
1264 | ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n", |
1265 | iso->host->id); | |
1da177e4 LT |
1266 | return; |
1267 | } | |
1268 | ||
1269 | dev = hi->dev; | |
1270 | ||
1271 | nready = hpsb_iso_n_ready(iso); | |
1272 | for (i = 0; i < nready; i++) { | |
1273 | struct hpsb_iso_packet_info *info = | |
1274 | &iso->infos[(iso->first_packet + i) % iso->buf_packets]; | |
faf26bcc | 1275 | data = (__be32 *)(iso->data_buf.kvirt + info->offset); |
1da177e4 LT |
1276 | |
1277 | /* skip over GASP header */ | |
1278 | buf = (char *)data + 8; | |
1279 | len = info->len - 8; | |
1280 | ||
efbeccf1 SR |
1281 | specifier_id = (be32_to_cpu(data[0]) & 0xffff) << 8 | |
1282 | (be32_to_cpu(data[1]) & 0xff000000) >> 24; | |
1da177e4 LT |
1283 | source_id = be32_to_cpu(data[0]) >> 16; |
1284 | ||
efbeccf1 SR |
1285 | if (info->channel != (iso->host->csr.broadcast_channel & 0x3f) |
1286 | || specifier_id != ETHER1394_GASP_SPECIFIER_ID) { | |
1da177e4 LT |
1287 | /* This packet is not for us */ |
1288 | continue; | |
1289 | } | |
1290 | ether1394_data_handler(dev, source_id, LOCAL_BUS | ALL_NODES, | |
1291 | buf, len); | |
1292 | } | |
1293 | ||
1294 | hpsb_iso_recv_release_packets(iso, i); | |
1295 | ||
1da177e4 LT |
1296 | } |
1297 | ||
1298 | /****************************************** | |
1299 | * Datagram transmission code | |
1300 | ******************************************/ | |
1301 | ||
1302 | /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire | |
1303 | * arphdr) is the same format as the ip1394 header, so they overlap. The rest | |
1304 | * needs to be munged a bit. The remainder of the arphdr is formatted based | |
1305 | * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to | |
1306 | * judge. | |
1307 | * | |
1308 | * Now that the EUI is used for the hardware address all we need to do to make | |
1309 | * this work for 1394 is to insert 2 quadlets that contain max_rec size, | |
1310 | * speed, and unicast FIFO address information between the sender_unique_id | |
1311 | * and the IP addresses. | |
1312 | */ | |
e00f04a7 SR |
1313 | static void ether1394_arp_to_1394arp(struct sk_buff *skb, |
1314 | struct net_device *dev) | |
1da177e4 LT |
1315 | { |
1316 | struct eth1394_priv *priv = netdev_priv(dev); | |
1da177e4 LT |
1317 | struct arphdr *arp = (struct arphdr *)skb->data; |
1318 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
1319 | struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data; | |
1320 | ||
1da177e4 LT |
1321 | arp1394->hw_addr_len = 16; |
1322 | arp1394->sip = *(u32*)(arp_ptr + ETH1394_ALEN); | |
1323 | arp1394->max_rec = priv->host->csr.max_rec; | |
1324 | arp1394->sspd = priv->host->csr.lnk_spd; | |
efbeccf1 SR |
1325 | arp1394->fifo_hi = htons(priv->local_fifo >> 32); |
1326 | arp1394->fifo_lo = htonl(priv->local_fifo & ~0x0); | |
1da177e4 LT |
1327 | } |
1328 | ||
1329 | /* We need to encapsulate the standard header with our own. We use the | |
1330 | * ethernet header's proto for our own. */ | |
e00f04a7 SR |
1331 | static unsigned int ether1394_encapsulate_prep(unsigned int max_payload, |
1332 | __be16 proto, | |
1333 | union eth1394_hdr *hdr, | |
1334 | u16 dg_size, u16 dgl) | |
1da177e4 | 1335 | { |
efbeccf1 SR |
1336 | unsigned int adj_max_payload = |
1337 | max_payload - hdr_type_len[ETH1394_HDR_LF_UF]; | |
1da177e4 LT |
1338 | |
1339 | /* Does it all fit in one packet? */ | |
1340 | if (dg_size <= adj_max_payload) { | |
1341 | hdr->uf.lf = ETH1394_HDR_LF_UF; | |
1342 | hdr->uf.ether_type = proto; | |
1343 | } else { | |
1344 | hdr->ff.lf = ETH1394_HDR_LF_FF; | |
1345 | hdr->ff.ether_type = proto; | |
1346 | hdr->ff.dg_size = dg_size - 1; | |
1347 | hdr->ff.dgl = dgl; | |
1348 | adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_FF]; | |
1349 | } | |
68e2aa79 | 1350 | return DIV_ROUND_UP(dg_size, adj_max_payload); |
1da177e4 LT |
1351 | } |
1352 | ||
e00f04a7 SR |
1353 | static unsigned int ether1394_encapsulate(struct sk_buff *skb, |
1354 | unsigned int max_payload, | |
1355 | union eth1394_hdr *hdr) | |
1da177e4 LT |
1356 | { |
1357 | union eth1394_hdr *bufhdr; | |
1358 | int ftype = hdr->common.lf; | |
1359 | int hdrsz = hdr_type_len[ftype]; | |
1360 | unsigned int adj_max_payload = max_payload - hdrsz; | |
1361 | ||
efbeccf1 | 1362 | switch (ftype) { |
1da177e4 LT |
1363 | case ETH1394_HDR_LF_UF: |
1364 | bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz); | |
1365 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1366 | bufhdr->words.word2 = hdr->words.word2; | |
1367 | break; | |
1368 | ||
1369 | case ETH1394_HDR_LF_FF: | |
1370 | bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz); | |
1371 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1372 | bufhdr->words.word2 = hdr->words.word2; | |
1373 | bufhdr->words.word3 = htons(hdr->words.word3); | |
1374 | bufhdr->words.word4 = 0; | |
1375 | ||
1376 | /* Set frag type here for future interior fragments */ | |
1377 | hdr->common.lf = ETH1394_HDR_LF_IF; | |
1378 | hdr->sf.fg_off = 0; | |
1379 | break; | |
1380 | ||
1381 | default: | |
1382 | hdr->sf.fg_off += adj_max_payload; | |
1383 | bufhdr = (union eth1394_hdr *)skb_pull(skb, adj_max_payload); | |
1384 | if (max_payload >= skb->len) | |
1385 | hdr->common.lf = ETH1394_HDR_LF_LF; | |
1386 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1387 | bufhdr->words.word2 = htons(hdr->words.word2); | |
1388 | bufhdr->words.word3 = htons(hdr->words.word3); | |
1389 | bufhdr->words.word4 = 0; | |
1390 | } | |
1da177e4 LT |
1391 | return min(max_payload, skb->len); |
1392 | } | |
1393 | ||
e00f04a7 | 1394 | static struct hpsb_packet *ether1394_alloc_common_packet(struct hpsb_host *host) |
1da177e4 LT |
1395 | { |
1396 | struct hpsb_packet *p; | |
1397 | ||
1398 | p = hpsb_alloc_packet(0); | |
1399 | if (p) { | |
1400 | p->host = host; | |
1401 | p->generation = get_hpsb_generation(host); | |
1402 | p->type = hpsb_async; | |
1403 | } | |
1404 | return p; | |
1405 | } | |
1406 | ||
e00f04a7 SR |
1407 | static int ether1394_prep_write_packet(struct hpsb_packet *p, |
1408 | struct hpsb_host *host, nodeid_t node, | |
efbeccf1 | 1409 | u64 addr, void *data, int tx_len) |
1da177e4 LT |
1410 | { |
1411 | p->node_id = node; | |
1da177e4 | 1412 | |
7a97bc03 SR |
1413 | if (hpsb_get_tlabel(p)) |
1414 | return -EAGAIN; | |
1da177e4 | 1415 | |
7a97bc03 | 1416 | p->tcode = TCODE_WRITEB; |
1da177e4 LT |
1417 | p->header_size = 16; |
1418 | p->expect_response = 1; | |
efbeccf1 SR |
1419 | p->header[0] = |
1420 | p->node_id << 16 | p->tlabel << 10 | 1 << 8 | TCODE_WRITEB << 4; | |
7a97bc03 SR |
1421 | p->header[1] = host->node_id << 16 | addr >> 32; |
1422 | p->header[2] = addr & 0xffffffff; | |
1da177e4 LT |
1423 | p->header[3] = tx_len << 16; |
1424 | p->data_size = (tx_len + 3) & ~3; | |
efbeccf1 | 1425 | p->data = data; |
1da177e4 LT |
1426 | |
1427 | return 0; | |
1428 | } | |
1429 | ||
e00f04a7 SR |
1430 | static void ether1394_prep_gasp_packet(struct hpsb_packet *p, |
1431 | struct eth1394_priv *priv, | |
1432 | struct sk_buff *skb, int length) | |
1da177e4 LT |
1433 | { |
1434 | p->header_size = 4; | |
1435 | p->tcode = TCODE_STREAM_DATA; | |
1436 | ||
efbeccf1 SR |
1437 | p->header[0] = length << 16 | 3 << 14 | priv->broadcast_channel << 8 | |
1438 | TCODE_STREAM_DATA << 4; | |
1da177e4 | 1439 | p->data_size = length; |
efbeccf1 SR |
1440 | p->data = (quadlet_t *)skb->data - 2; |
1441 | p->data[0] = cpu_to_be32(priv->host->node_id << 16 | | |
1da177e4 | 1442 | ETHER1394_GASP_SPECIFIER_ID_HI); |
efbeccf1 | 1443 | p->data[1] = cpu_to_be32(ETHER1394_GASP_SPECIFIER_ID_LO << 24 | |
7136b807 | 1444 | ETHER1394_GASP_VERSION); |
1da177e4 | 1445 | |
1da177e4 | 1446 | p->speed_code = priv->bc_sspd; |
21b2c564 SR |
1447 | |
1448 | /* prevent hpsb_send_packet() from overriding our speed code */ | |
1449 | p->node_id = LOCAL_BUS | ALL_NODES; | |
1da177e4 LT |
1450 | } |
1451 | ||
e00f04a7 | 1452 | static void ether1394_free_packet(struct hpsb_packet *packet) |
1da177e4 LT |
1453 | { |
1454 | if (packet->tcode != TCODE_STREAM_DATA) | |
1455 | hpsb_free_tlabel(packet); | |
1456 | hpsb_free_packet(packet); | |
1457 | } | |
1458 | ||
1459 | static void ether1394_complete_cb(void *__ptask); | |
1460 | ||
1461 | static int ether1394_send_packet(struct packet_task *ptask, unsigned int tx_len) | |
1462 | { | |
1463 | struct eth1394_priv *priv = ptask->priv; | |
1464 | struct hpsb_packet *packet = NULL; | |
1465 | ||
1466 | packet = ether1394_alloc_common_packet(priv->host); | |
1467 | if (!packet) | |
7a97bc03 | 1468 | return -ENOMEM; |
1da177e4 LT |
1469 | |
1470 | if (ptask->tx_type == ETH1394_GASP) { | |
efbeccf1 | 1471 | int length = tx_len + 2 * sizeof(quadlet_t); |
1da177e4 LT |
1472 | |
1473 | ether1394_prep_gasp_packet(packet, priv, ptask->skb, length); | |
1474 | } else if (ether1394_prep_write_packet(packet, priv->host, | |
1475 | ptask->dest_node, | |
1476 | ptask->addr, ptask->skb->data, | |
1477 | tx_len)) { | |
1478 | hpsb_free_packet(packet); | |
7a97bc03 | 1479 | return -EAGAIN; |
1da177e4 LT |
1480 | } |
1481 | ||
1482 | ptask->packet = packet; | |
1483 | hpsb_set_packet_complete_task(ptask->packet, ether1394_complete_cb, | |
1484 | ptask); | |
1485 | ||
1486 | if (hpsb_send_packet(packet) < 0) { | |
1487 | ether1394_free_packet(packet); | |
7a97bc03 | 1488 | return -EIO; |
1da177e4 LT |
1489 | } |
1490 | ||
1491 | return 0; | |
1492 | } | |
1493 | ||
1da177e4 | 1494 | /* Task function to be run when a datagram transmission is completed */ |
e00f04a7 | 1495 | static void ether1394_dg_complete(struct packet_task *ptask, int fail) |
1da177e4 LT |
1496 | { |
1497 | struct sk_buff *skb = ptask->skb; | |
92dc8cc3 SH |
1498 | struct net_device *dev = skb->dev; |
1499 | struct eth1394_priv *priv = netdev_priv(dev); | |
1da177e4 LT |
1500 | unsigned long flags; |
1501 | ||
1502 | /* Statistics */ | |
1503 | spin_lock_irqsave(&priv->lock, flags); | |
1504 | if (fail) { | |
92dc8cc3 SH |
1505 | dev->stats.tx_dropped++; |
1506 | dev->stats.tx_errors++; | |
1da177e4 | 1507 | } else { |
92dc8cc3 SH |
1508 | dev->stats.tx_bytes += skb->len; |
1509 | dev->stats.tx_packets++; | |
1da177e4 LT |
1510 | } |
1511 | spin_unlock_irqrestore(&priv->lock, flags); | |
1512 | ||
1513 | dev_kfree_skb_any(skb); | |
1514 | kmem_cache_free(packet_task_cache, ptask); | |
1515 | } | |
1516 | ||
1da177e4 LT |
1517 | /* Callback for when a packet has been sent and the status of that packet is |
1518 | * known */ | |
1519 | static void ether1394_complete_cb(void *__ptask) | |
1520 | { | |
1521 | struct packet_task *ptask = (struct packet_task *)__ptask; | |
1522 | struct hpsb_packet *packet = ptask->packet; | |
1523 | int fail = 0; | |
1524 | ||
1525 | if (packet->tcode != TCODE_STREAM_DATA) | |
1526 | fail = hpsb_packet_success(packet); | |
1527 | ||
1528 | ether1394_free_packet(packet); | |
1529 | ||
1530 | ptask->outstanding_pkts--; | |
1531 | if (ptask->outstanding_pkts > 0 && !fail) { | |
7a97bc03 | 1532 | int tx_len, err; |
1da177e4 LT |
1533 | |
1534 | /* Add the encapsulation header to the fragment */ | |
1535 | tx_len = ether1394_encapsulate(ptask->skb, ptask->max_payload, | |
1536 | &ptask->hdr); | |
7a97bc03 SR |
1537 | err = ether1394_send_packet(ptask, tx_len); |
1538 | if (err) { | |
1539 | if (err == -EAGAIN) | |
1540 | ETH1394_PRINT_G(KERN_ERR, "Out of tlabels\n"); | |
1541 | ||
1da177e4 | 1542 | ether1394_dg_complete(ptask, 1); |
7a97bc03 | 1543 | } |
1da177e4 LT |
1544 | } else { |
1545 | ether1394_dg_complete(ptask, fail); | |
1546 | } | |
1547 | } | |
1548 | ||
1da177e4 | 1549 | /* Transmit a packet (called by kernel) */ |
6fef4c0c SH |
1550 | static netdev_tx_t ether1394_tx(struct sk_buff *skb, |
1551 | struct net_device *dev) | |
1da177e4 | 1552 | { |
18b46179 | 1553 | struct eth1394hdr hdr_buf; |
1da177e4 | 1554 | struct eth1394_priv *priv = netdev_priv(dev); |
02f4213f | 1555 | __be16 proto; |
1da177e4 LT |
1556 | unsigned long flags; |
1557 | nodeid_t dest_node; | |
1558 | eth1394_tx_type tx_type; | |
1da177e4 LT |
1559 | unsigned int tx_len; |
1560 | unsigned int max_payload; | |
1561 | u16 dg_size; | |
1562 | u16 dgl; | |
1563 | struct packet_task *ptask; | |
1564 | struct eth1394_node_ref *node; | |
1565 | struct eth1394_node_info *node_info = NULL; | |
1566 | ||
53f374e7 | 1567 | ptask = kmem_cache_alloc(packet_task_cache, GFP_ATOMIC); |
fdc0092b | 1568 | if (ptask == NULL) |
1da177e4 | 1569 | goto fail; |
1da177e4 LT |
1570 | |
1571 | /* XXX Ignore this for now. Noticed that when MacOSX is the IRM, | |
1572 | * it does not set our validity bit. We need to compensate for | |
1573 | * that somewhere else, but not in eth1394. */ | |
1574 | #if 0 | |
fdc0092b | 1575 | if ((priv->host->csr.broadcast_channel & 0xc0000000) != 0xc0000000) |
1da177e4 | 1576 | goto fail; |
1da177e4 LT |
1577 | #endif |
1578 | ||
53f374e7 | 1579 | skb = skb_share_check(skb, GFP_ATOMIC); |
fdc0092b | 1580 | if (!skb) |
1da177e4 | 1581 | goto fail; |
1da177e4 | 1582 | |
18b46179 CU |
1583 | /* Get rid of the fake eth1394 header, but first make a copy. |
1584 | * We might need to rebuild the header on tx failure. */ | |
1585 | memcpy(&hdr_buf, skb->data, sizeof(hdr_buf)); | |
1da177e4 LT |
1586 | skb_pull(skb, ETH1394_HLEN); |
1587 | ||
18b46179 | 1588 | proto = hdr_buf.h_proto; |
1da177e4 LT |
1589 | dg_size = skb->len; |
1590 | ||
1591 | /* Set the transmission type for the packet. ARP packets and IP | |
1592 | * broadcast packets are sent via GASP. */ | |
18b46179 | 1593 | if (memcmp(hdr_buf.h_dest, dev->broadcast, ETH1394_ALEN) == 0 || |
7136b807 BC |
1594 | proto == htons(ETH_P_ARP) || |
1595 | (proto == htons(ETH_P_IP) && | |
eddc9ec5 | 1596 | IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) { |
1da177e4 LT |
1597 | tx_type = ETH1394_GASP; |
1598 | dest_node = LOCAL_BUS | ALL_NODES; | |
1599 | max_payload = priv->bc_maxpayload - ETHER1394_GASP_OVERHEAD; | |
efbeccf1 | 1600 | BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD); |
1da177e4 LT |
1601 | dgl = priv->bc_dgl; |
1602 | if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF]) | |
1603 | priv->bc_dgl++; | |
1604 | } else { | |
faf26bcc | 1605 | __be64 guid = get_unaligned((__be64 *)hdr_buf.h_dest); |
c20e3945 | 1606 | |
1da177e4 | 1607 | node = eth1394_find_node_guid(&priv->ip_node_list, |
c20e3945 | 1608 | be64_to_cpu(guid)); |
fdc0092b | 1609 | if (!node) |
1da177e4 | 1610 | goto fail; |
fdc0092b | 1611 | |
bab03059 | 1612 | node_info = dev_get_drvdata(&node->ud->device); |
fdc0092b | 1613 | if (node_info->fifo == CSR1212_INVALID_ADDR_SPACE) |
1da177e4 | 1614 | goto fail; |
1da177e4 LT |
1615 | |
1616 | dest_node = node->ud->ne->nodeid; | |
1617 | max_payload = node_info->maxpayload; | |
efbeccf1 | 1618 | BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD); |
1da177e4 LT |
1619 | |
1620 | dgl = node_info->dgl; | |
1621 | if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF]) | |
1622 | node_info->dgl++; | |
1623 | tx_type = ETH1394_WRREQ; | |
1624 | } | |
1625 | ||
1626 | /* If this is an ARP packet, convert it */ | |
7136b807 | 1627 | if (proto == htons(ETH_P_ARP)) |
efbeccf1 | 1628 | ether1394_arp_to_1394arp(skb, dev); |
1da177e4 LT |
1629 | |
1630 | ptask->hdr.words.word1 = 0; | |
1631 | ptask->hdr.words.word2 = 0; | |
1632 | ptask->hdr.words.word3 = 0; | |
1633 | ptask->hdr.words.word4 = 0; | |
1634 | ptask->skb = skb; | |
1635 | ptask->priv = priv; | |
1636 | ptask->tx_type = tx_type; | |
1637 | ||
1638 | if (tx_type != ETH1394_GASP) { | |
1639 | u64 addr; | |
1640 | ||
1641 | spin_lock_irqsave(&priv->lock, flags); | |
1642 | addr = node_info->fifo; | |
1643 | spin_unlock_irqrestore(&priv->lock, flags); | |
1644 | ||
1645 | ptask->addr = addr; | |
1646 | ptask->dest_node = dest_node; | |
1647 | } | |
1648 | ||
1649 | ptask->tx_type = tx_type; | |
1650 | ptask->max_payload = max_payload; | |
efbeccf1 SR |
1651 | ptask->outstanding_pkts = ether1394_encapsulate_prep(max_payload, |
1652 | proto, &ptask->hdr, dg_size, dgl); | |
1da177e4 LT |
1653 | |
1654 | /* Add the encapsulation header to the fragment */ | |
1655 | tx_len = ether1394_encapsulate(skb, max_payload, &ptask->hdr); | |
1656 | dev->trans_start = jiffies; | |
7a97bc03 SR |
1657 | if (ether1394_send_packet(ptask, tx_len)) { |
1658 | if (dest_node == (LOCAL_BUS | ALL_NODES)) | |
1659 | goto fail; | |
1660 | ||
18b46179 CU |
1661 | /* At this point we want to restore the packet. When we return |
1662 | * here with NETDEV_TX_BUSY we will get another entrance in this | |
1663 | * routine with the same skb and we need it to look the same. | |
1664 | * So we pull 4 more bytes, then build the header again. */ | |
1665 | skb_pull(skb, 4); | |
1666 | ether1394_header(skb, dev, ntohs(hdr_buf.h_proto), | |
1667 | hdr_buf.h_dest, NULL, 0); | |
1668 | ||
7a97bc03 SR |
1669 | /* Most failures of ether1394_send_packet are recoverable. */ |
1670 | netif_stop_queue(dev); | |
1671 | priv->wake_node = dest_node; | |
1672 | schedule_work(&priv->wake); | |
1673 | kmem_cache_free(packet_task_cache, ptask); | |
1674 | return NETDEV_TX_BUSY; | |
1675 | } | |
1da177e4 | 1676 | |
fdc0092b | 1677 | return NETDEV_TX_OK; |
1da177e4 LT |
1678 | fail: |
1679 | if (ptask) | |
1680 | kmem_cache_free(packet_task_cache, ptask); | |
1681 | ||
1682 | if (skb != NULL) | |
1683 | dev_kfree_skb(skb); | |
1684 | ||
efbeccf1 | 1685 | spin_lock_irqsave(&priv->lock, flags); |
92dc8cc3 SH |
1686 | dev->stats.tx_dropped++; |
1687 | dev->stats.tx_errors++; | |
efbeccf1 | 1688 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1689 | |
fdc0092b | 1690 | return NETDEV_TX_OK; |
1da177e4 LT |
1691 | } |
1692 | ||
809e905c | 1693 | static int __init ether1394_init_module(void) |
1da177e4 | 1694 | { |
809e905c AM |
1695 | int err; |
1696 | ||
efbeccf1 SR |
1697 | packet_task_cache = kmem_cache_create("packet_task", |
1698 | sizeof(struct packet_task), | |
20c2df83 | 1699 | 0, 0, NULL); |
809e905c AM |
1700 | if (!packet_task_cache) |
1701 | return -ENOMEM; | |
1da177e4 | 1702 | |
1da177e4 | 1703 | hpsb_register_highlevel(ð1394_highlevel); |
809e905c AM |
1704 | err = hpsb_register_protocol(ð1394_proto_driver); |
1705 | if (err) { | |
1706 | hpsb_unregister_highlevel(ð1394_highlevel); | |
1707 | kmem_cache_destroy(packet_task_cache); | |
1708 | } | |
1709 | return err; | |
1da177e4 LT |
1710 | } |
1711 | ||
809e905c | 1712 | static void __exit ether1394_exit_module(void) |
1da177e4 LT |
1713 | { |
1714 | hpsb_unregister_protocol(ð1394_proto_driver); | |
1715 | hpsb_unregister_highlevel(ð1394_highlevel); | |
1716 | kmem_cache_destroy(packet_task_cache); | |
1717 | } | |
1718 | ||
1719 | module_init(ether1394_init_module); | |
1720 | module_exit(ether1394_exit_module); |