Commit | Line | Data |
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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> | |
61 | #include <linux/ethtool.h> | |
62 | #include <asm/uaccess.h> | |
63 | #include <asm/delay.h> | |
c20e3945 | 64 | #include <asm/unaligned.h> |
1da177e4 LT |
65 | #include <net/arp.h> |
66 | ||
de4394f1 | 67 | #include "config_roms.h" |
1da177e4 | 68 | #include "csr1212.h" |
de4394f1 SR |
69 | #include "eth1394.h" |
70 | #include "highlevel.h" | |
71 | #include "ieee1394.h" | |
1da177e4 | 72 | #include "ieee1394_core.h" |
de4394f1 | 73 | #include "ieee1394_hotplug.h" |
1da177e4 | 74 | #include "ieee1394_transactions.h" |
de4394f1 | 75 | #include "ieee1394_types.h" |
1da177e4 LT |
76 | #include "iso.h" |
77 | #include "nodemgr.h" | |
1da177e4 LT |
78 | |
79 | #define ETH1394_PRINT_G(level, fmt, args...) \ | |
80 | printk(level "%s: " fmt, driver_name, ## args) | |
81 | ||
82 | #define ETH1394_PRINT(level, dev_name, fmt, args...) \ | |
83 | printk(level "%s: %s: " fmt, driver_name, dev_name, ## args) | |
84 | ||
1da177e4 LT |
85 | struct fragment_info { |
86 | struct list_head list; | |
87 | int offset; | |
88 | int len; | |
89 | }; | |
90 | ||
91 | struct partial_datagram { | |
92 | struct list_head list; | |
93 | u16 dgl; | |
94 | u16 dg_size; | |
95 | u16 ether_type; | |
96 | struct sk_buff *skb; | |
97 | char *pbuf; | |
98 | struct list_head frag_info; | |
99 | }; | |
100 | ||
101 | struct pdg_list { | |
efbeccf1 SR |
102 | struct list_head list; /* partial datagram list per node */ |
103 | unsigned int sz; /* partial datagram list size per node */ | |
104 | spinlock_t lock; /* partial datagram lock */ | |
1da177e4 LT |
105 | }; |
106 | ||
107 | struct eth1394_host_info { | |
108 | struct hpsb_host *host; | |
109 | struct net_device *dev; | |
110 | }; | |
111 | ||
112 | struct eth1394_node_ref { | |
113 | struct unit_directory *ud; | |
114 | struct list_head list; | |
115 | }; | |
116 | ||
117 | struct eth1394_node_info { | |
efbeccf1 SR |
118 | u16 maxpayload; /* max payload */ |
119 | u8 sspd; /* max speed */ | |
120 | u64 fifo; /* FIFO address */ | |
121 | struct pdg_list pdg; /* partial RX datagram lists */ | |
122 | int dgl; /* outgoing datagram label */ | |
1da177e4 LT |
123 | }; |
124 | ||
efbeccf1 | 125 | static const char driver_name[] = "eth1394"; |
1da177e4 | 126 | |
e18b890b | 127 | static struct kmem_cache *packet_task_cache; |
1da177e4 LT |
128 | |
129 | static struct hpsb_highlevel eth1394_highlevel; | |
130 | ||
131 | /* Use common.lf to determine header len */ | |
132 | static const int hdr_type_len[] = { | |
efbeccf1 SR |
133 | sizeof(struct eth1394_uf_hdr), |
134 | sizeof(struct eth1394_ff_hdr), | |
135 | sizeof(struct eth1394_sf_hdr), | |
136 | sizeof(struct eth1394_sf_hdr) | |
1da177e4 LT |
137 | }; |
138 | ||
1da177e4 LT |
139 | static const u16 eth1394_speedto_maxpayload[] = { |
140 | /* S100, S200, S400, S800, S1600, S3200 */ | |
141 | 512, 1024, 2048, 4096, 4096, 4096 | |
142 | }; | |
143 | ||
144 | MODULE_AUTHOR("Ben Collins (bcollins@debian.org)"); | |
145 | MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)"); | |
146 | MODULE_LICENSE("GPL"); | |
147 | ||
efbeccf1 SR |
148 | /* |
149 | * The max_partial_datagrams parameter is the maximum number of fragmented | |
1da177e4 LT |
150 | * datagrams per node that eth1394 will keep in memory. Providing an upper |
151 | * bound allows us to limit the amount of memory that partial datagrams | |
152 | * consume in the event that some partial datagrams are never completed. | |
153 | */ | |
154 | static int max_partial_datagrams = 25; | |
155 | module_param(max_partial_datagrams, int, S_IRUGO | S_IWUSR); | |
156 | MODULE_PARM_DESC(max_partial_datagrams, | |
157 | "Maximum number of partially received fragmented datagrams " | |
158 | "(default = 25)."); | |
159 | ||
160 | ||
161 | static int ether1394_header(struct sk_buff *skb, struct net_device *dev, | |
162 | unsigned short type, void *daddr, void *saddr, | |
163 | unsigned len); | |
164 | static int ether1394_rebuild_header(struct sk_buff *skb); | |
165 | static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr); | |
166 | static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh); | |
167 | static void ether1394_header_cache_update(struct hh_cache *hh, | |
168 | struct net_device *dev, | |
efbeccf1 | 169 | unsigned char *haddr); |
1da177e4 LT |
170 | static int ether1394_tx(struct sk_buff *skb, struct net_device *dev); |
171 | static void ether1394_iso(struct hpsb_iso *iso); | |
172 | ||
173 | static struct ethtool_ops ethtool_ops; | |
174 | ||
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 */ | |
182 | static struct hpsb_address_ops addr_ops = { | |
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 | ||
246 | /* Return statistics to the caller */ | |
efbeccf1 | 247 | static struct net_device_stats *ether1394_stats(struct net_device *dev) |
1da177e4 LT |
248 | { |
249 | return &(((struct eth1394_priv *)netdev_priv(dev))->stats); | |
250 | } | |
251 | ||
efbeccf1 SR |
252 | /* FIXME: What to do if we timeout? I think a host reset is probably in order, |
253 | * so that's what we do. Should we increment the stat counters too? */ | |
254 | static void ether1394_tx_timeout(struct net_device *dev) | |
1da177e4 | 255 | { |
efbeccf1 SR |
256 | struct hpsb_host *host = |
257 | ((struct eth1394_priv *)netdev_priv(dev))->host; | |
1da177e4 | 258 | |
246a5fda SR |
259 | ETH1394_PRINT(KERN_ERR, dev->name, "Timeout, resetting host\n"); |
260 | ether1394_host_reset(host); | |
1da177e4 LT |
261 | } |
262 | ||
17bab407 SR |
263 | static inline int ether1394_max_mtu(struct hpsb_host* host) |
264 | { | |
265 | return (1 << (host->csr.max_rec + 1)) | |
266 | - sizeof(union eth1394_hdr) - ETHER1394_GASP_OVERHEAD; | |
267 | } | |
268 | ||
1da177e4 LT |
269 | static int ether1394_change_mtu(struct net_device *dev, int new_mtu) |
270 | { | |
17bab407 | 271 | int max_mtu; |
1da177e4 | 272 | |
17bab407 | 273 | if (new_mtu < 68) |
1da177e4 | 274 | return -EINVAL; |
efbeccf1 | 275 | |
17bab407 SR |
276 | max_mtu = ether1394_max_mtu( |
277 | ((struct eth1394_priv *)netdev_priv(dev))->host); | |
278 | if (new_mtu > max_mtu) { | |
279 | ETH1394_PRINT(KERN_INFO, dev->name, | |
280 | "Local node constrains MTU to %d\n", max_mtu); | |
281 | return -ERANGE; | |
282 | } | |
283 | ||
1da177e4 LT |
284 | dev->mtu = new_mtu; |
285 | return 0; | |
286 | } | |
287 | ||
288 | static void purge_partial_datagram(struct list_head *old) | |
289 | { | |
efbeccf1 | 290 | struct partial_datagram *pd; |
1da177e4 | 291 | struct list_head *lh, *n; |
efbeccf1 SR |
292 | struct fragment_info *fi; |
293 | ||
294 | pd = list_entry(old, struct partial_datagram, list); | |
1da177e4 LT |
295 | |
296 | list_for_each_safe(lh, n, &pd->frag_info) { | |
efbeccf1 | 297 | fi = list_entry(lh, struct fragment_info, list); |
1da177e4 LT |
298 | list_del(lh); |
299 | kfree(fi); | |
300 | } | |
301 | list_del(old); | |
302 | kfree_skb(pd->skb); | |
303 | kfree(pd); | |
304 | } | |
305 | ||
306 | /****************************************** | |
307 | * 1394 bus activity functions | |
308 | ******************************************/ | |
309 | ||
310 | static struct eth1394_node_ref *eth1394_find_node(struct list_head *inl, | |
311 | struct unit_directory *ud) | |
312 | { | |
313 | struct eth1394_node_ref *node; | |
314 | ||
315 | list_for_each_entry(node, inl, list) | |
316 | if (node->ud == ud) | |
317 | return node; | |
318 | ||
319 | return NULL; | |
320 | } | |
321 | ||
322 | static struct eth1394_node_ref *eth1394_find_node_guid(struct list_head *inl, | |
323 | u64 guid) | |
324 | { | |
325 | struct eth1394_node_ref *node; | |
326 | ||
327 | list_for_each_entry(node, inl, list) | |
328 | if (node->ud->ne->guid == guid) | |
329 | return node; | |
330 | ||
331 | return NULL; | |
332 | } | |
333 | ||
334 | static struct eth1394_node_ref *eth1394_find_node_nodeid(struct list_head *inl, | |
335 | nodeid_t nodeid) | |
336 | { | |
337 | struct eth1394_node_ref *node; | |
efbeccf1 SR |
338 | |
339 | list_for_each_entry(node, inl, list) | |
1da177e4 LT |
340 | if (node->ud->ne->nodeid == nodeid) |
341 | return node; | |
1da177e4 LT |
342 | |
343 | return NULL; | |
344 | } | |
345 | ||
d06c1dda SR |
346 | static int eth1394_new_node(struct eth1394_host_info *hi, |
347 | struct unit_directory *ud) | |
1da177e4 | 348 | { |
1da177e4 LT |
349 | struct eth1394_priv *priv; |
350 | struct eth1394_node_ref *new_node; | |
351 | struct eth1394_node_info *node_info; | |
352 | ||
5e7abccd | 353 | new_node = kmalloc(sizeof(*new_node), GFP_KERNEL); |
1da177e4 LT |
354 | if (!new_node) |
355 | return -ENOMEM; | |
356 | ||
5e7abccd | 357 | node_info = kmalloc(sizeof(*node_info), GFP_KERNEL); |
1da177e4 LT |
358 | if (!node_info) { |
359 | kfree(new_node); | |
360 | return -ENOMEM; | |
361 | } | |
362 | ||
363 | spin_lock_init(&node_info->pdg.lock); | |
364 | INIT_LIST_HEAD(&node_info->pdg.list); | |
365 | node_info->pdg.sz = 0; | |
6737231e | 366 | node_info->fifo = CSR1212_INVALID_ADDR_SPACE; |
1da177e4 LT |
367 | |
368 | ud->device.driver_data = node_info; | |
369 | new_node->ud = ud; | |
370 | ||
371 | priv = netdev_priv(hi->dev); | |
372 | list_add_tail(&new_node->list, &priv->ip_node_list); | |
1da177e4 LT |
373 | return 0; |
374 | } | |
375 | ||
d06c1dda SR |
376 | static int eth1394_probe(struct device *dev) |
377 | { | |
378 | struct unit_directory *ud; | |
379 | struct eth1394_host_info *hi; | |
380 | ||
381 | ud = container_of(dev, struct unit_directory, device); | |
382 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
383 | if (!hi) | |
384 | return -ENOENT; | |
385 | ||
386 | return eth1394_new_node(hi, ud); | |
387 | } | |
388 | ||
1da177e4 LT |
389 | static int eth1394_remove(struct device *dev) |
390 | { | |
391 | struct unit_directory *ud; | |
392 | struct eth1394_host_info *hi; | |
393 | struct eth1394_priv *priv; | |
394 | struct eth1394_node_ref *old_node; | |
395 | struct eth1394_node_info *node_info; | |
396 | struct list_head *lh, *n; | |
397 | unsigned long flags; | |
398 | ||
399 | ud = container_of(dev, struct unit_directory, device); | |
400 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
401 | if (!hi) | |
402 | return -ENOENT; | |
403 | ||
404 | priv = netdev_priv(hi->dev); | |
405 | ||
406 | old_node = eth1394_find_node(&priv->ip_node_list, ud); | |
efbeccf1 SR |
407 | if (!old_node) |
408 | return 0; | |
1da177e4 | 409 | |
efbeccf1 SR |
410 | list_del(&old_node->list); |
411 | kfree(old_node); | |
1da177e4 | 412 | |
efbeccf1 | 413 | node_info = (struct eth1394_node_info*)ud->device.driver_data; |
1da177e4 | 414 | |
efbeccf1 SR |
415 | spin_lock_irqsave(&node_info->pdg.lock, flags); |
416 | /* The partial datagram list should be empty, but we'll just | |
417 | * make sure anyway... */ | |
418 | list_for_each_safe(lh, n, &node_info->pdg.list) | |
419 | purge_partial_datagram(lh); | |
420 | spin_unlock_irqrestore(&node_info->pdg.lock, flags); | |
1da177e4 | 421 | |
efbeccf1 SR |
422 | kfree(node_info); |
423 | ud->device.driver_data = NULL; | |
1da177e4 LT |
424 | return 0; |
425 | } | |
426 | ||
427 | static int eth1394_update(struct unit_directory *ud) | |
428 | { | |
429 | struct eth1394_host_info *hi; | |
430 | struct eth1394_priv *priv; | |
431 | struct eth1394_node_ref *node; | |
1da177e4 LT |
432 | |
433 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
434 | if (!hi) | |
435 | return -ENOENT; | |
436 | ||
437 | priv = netdev_priv(hi->dev); | |
1da177e4 | 438 | node = eth1394_find_node(&priv->ip_node_list, ud); |
efbeccf1 SR |
439 | if (node) |
440 | return 0; | |
1da177e4 | 441 | |
d06c1dda | 442 | return eth1394_new_node(hi, ud); |
1da177e4 LT |
443 | } |
444 | ||
1da177e4 LT |
445 | static struct ieee1394_device_id eth1394_id_table[] = { |
446 | { | |
447 | .match_flags = (IEEE1394_MATCH_SPECIFIER_ID | | |
448 | IEEE1394_MATCH_VERSION), | |
449 | .specifier_id = ETHER1394_GASP_SPECIFIER_ID, | |
450 | .version = ETHER1394_GASP_VERSION, | |
451 | }, | |
452 | {} | |
453 | }; | |
454 | ||
455 | MODULE_DEVICE_TABLE(ieee1394, eth1394_id_table); | |
456 | ||
457 | static struct hpsb_protocol_driver eth1394_proto_driver = { | |
efbeccf1 | 458 | .name = driver_name, |
1da177e4 LT |
459 | .id_table = eth1394_id_table, |
460 | .update = eth1394_update, | |
461 | .driver = { | |
1da177e4 LT |
462 | .probe = eth1394_probe, |
463 | .remove = eth1394_remove, | |
464 | }, | |
465 | }; | |
466 | ||
efbeccf1 | 467 | static void ether1394_reset_priv(struct net_device *dev, int set_mtu) |
1da177e4 LT |
468 | { |
469 | unsigned long flags; | |
470 | int i; | |
471 | struct eth1394_priv *priv = netdev_priv(dev); | |
472 | struct hpsb_host *host = priv->host; | |
efbeccf1 | 473 | u64 guid = get_unaligned((u64 *)&(host->csr.rom->bus_info_data[3])); |
1da177e4 LT |
474 | int max_speed = IEEE1394_SPEED_MAX; |
475 | ||
efbeccf1 | 476 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 477 | |
027611b8 | 478 | memset(priv->ud_list, 0, sizeof(priv->ud_list)); |
1da177e4 LT |
479 | priv->bc_maxpayload = 512; |
480 | ||
481 | /* Determine speed limit */ | |
21b2c564 SR |
482 | /* FIXME: This is broken for nodes with link speed < PHY speed, |
483 | * and it is suboptimal for S200B...S800B hardware. | |
484 | * The result of nodemgr's speed probe should be used somehow. */ | |
485 | for (i = 0; i < host->node_count; i++) { | |
486 | /* take care of S100B...S400B PHY ports */ | |
487 | if (host->speed[i] == SELFID_SPEED_UNKNOWN) { | |
488 | max_speed = IEEE1394_SPEED_100; | |
489 | break; | |
490 | } | |
647dcb5f BC |
491 | if (max_speed > host->speed[i]) |
492 | max_speed = host->speed[i]; | |
21b2c564 | 493 | } |
1da177e4 LT |
494 | priv->bc_sspd = max_speed; |
495 | ||
1da177e4 | 496 | if (set_mtu) { |
17bab407 SR |
497 | /* Use the RFC 2734 default 1500 octets or the maximum payload |
498 | * as initial MTU */ | |
499 | dev->mtu = min(1500, ether1394_max_mtu(host)); | |
1da177e4 LT |
500 | |
501 | /* Set our hardware address while we're at it */ | |
c20e3945 DM |
502 | memcpy(dev->dev_addr, &guid, sizeof(u64)); |
503 | memset(dev->broadcast, 0xff, sizeof(u64)); | |
1da177e4 LT |
504 | } |
505 | ||
efbeccf1 | 506 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
507 | } |
508 | ||
efbeccf1 | 509 | static void ether1394_init_dev(struct net_device *dev) |
1da177e4 | 510 | { |
1da177e4 LT |
511 | dev->open = ether1394_open; |
512 | dev->stop = ether1394_stop; | |
513 | dev->hard_start_xmit = ether1394_tx; | |
514 | dev->get_stats = ether1394_stats; | |
515 | dev->tx_timeout = ether1394_tx_timeout; | |
516 | dev->change_mtu = ether1394_change_mtu; | |
517 | ||
518 | dev->hard_header = ether1394_header; | |
519 | dev->rebuild_header = ether1394_rebuild_header; | |
520 | dev->hard_header_cache = ether1394_header_cache; | |
521 | dev->header_cache_update= ether1394_header_cache_update; | |
522 | dev->hard_header_parse = ether1394_header_parse; | |
01590d20 | 523 | |
1da177e4 LT |
524 | SET_ETHTOOL_OPS(dev, ðtool_ops); |
525 | ||
1da177e4 LT |
526 | dev->watchdog_timeo = ETHER1394_TIMEOUT; |
527 | dev->flags = IFF_BROADCAST | IFF_MULTICAST; | |
528 | dev->features = NETIF_F_HIGHDMA; | |
529 | dev->addr_len = ETH1394_ALEN; | |
530 | dev->hard_header_len = ETH1394_HLEN; | |
531 | dev->type = ARPHRD_IEEE1394; | |
532 | ||
01590d20 SR |
533 | /* FIXME: This value was copied from ether_setup(). Is it too much? */ |
534 | dev->tx_queue_len = 1000; | |
1da177e4 LT |
535 | } |
536 | ||
7a97bc03 SR |
537 | /* |
538 | * Wake the queue up after commonly encountered transmit failure conditions are | |
539 | * hopefully over. Currently only tlabel exhaustion is accounted for. | |
540 | */ | |
541 | static void ether1394_wake_queue(struct work_struct *work) | |
542 | { | |
543 | struct eth1394_priv *priv; | |
544 | struct hpsb_packet *packet; | |
545 | ||
546 | priv = container_of(work, struct eth1394_priv, wake); | |
547 | packet = hpsb_alloc_packet(0); | |
548 | ||
549 | /* This is really bad, but unjam the queue anyway. */ | |
550 | if (!packet) | |
551 | goto out; | |
552 | ||
553 | packet->host = priv->host; | |
554 | packet->node_id = priv->wake_node; | |
555 | /* | |
556 | * A transaction label is all we really want. If we get one, it almost | |
557 | * always means we can get a lot more because the ieee1394 core recycled | |
558 | * a whole batch of tlabels, at last. | |
559 | */ | |
560 | if (hpsb_get_tlabel(packet) == 0) | |
561 | hpsb_free_tlabel(packet); | |
562 | ||
563 | hpsb_free_packet(packet); | |
564 | out: | |
565 | netif_wake_queue(priv->wake_dev); | |
566 | } | |
567 | ||
1da177e4 LT |
568 | /* |
569 | * This function is called every time a card is found. It is generally called | |
570 | * when the module is installed. This is where we add all of our ethernet | |
571 | * devices. One for each host. | |
572 | */ | |
efbeccf1 | 573 | static void ether1394_add_host(struct hpsb_host *host) |
1da177e4 LT |
574 | { |
575 | struct eth1394_host_info *hi = NULL; | |
576 | struct net_device *dev = NULL; | |
577 | struct eth1394_priv *priv; | |
1da177e4 LT |
578 | u64 fifo_addr; |
579 | ||
70093cfd SR |
580 | if (hpsb_config_rom_ip1394_add(host) != 0) { |
581 | ETH1394_PRINT_G(KERN_ERR, "Can't add IP-over-1394 ROM entry\n"); | |
1da177e4 | 582 | return; |
70093cfd | 583 | } |
1da177e4 | 584 | |
6737231e BC |
585 | fifo_addr = hpsb_allocate_and_register_addrspace( |
586 | ð1394_highlevel, host, &addr_ops, | |
587 | ETHER1394_REGION_ADDR_LEN, ETHER1394_REGION_ADDR_LEN, | |
588 | CSR1212_INVALID_ADDR_SPACE, CSR1212_INVALID_ADDR_SPACE); | |
157188cb SR |
589 | if (fifo_addr == CSR1212_INVALID_ADDR_SPACE) { |
590 | ETH1394_PRINT_G(KERN_ERR, "Cannot register CSR space\n"); | |
70093cfd | 591 | hpsb_config_rom_ip1394_remove(host); |
157188cb SR |
592 | return; |
593 | } | |
1da177e4 | 594 | |
01590d20 | 595 | dev = alloc_netdev(sizeof(*priv), "eth%d", ether1394_init_dev); |
1da177e4 | 596 | if (dev == NULL) { |
5009d269 | 597 | ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); |
1da177e4 | 598 | goto out; |
efbeccf1 | 599 | } |
1da177e4 LT |
600 | |
601 | SET_MODULE_OWNER(dev); | |
8e4dc400 | 602 | SET_NETDEV_DEV(dev, &host->device); |
1da177e4 LT |
603 | |
604 | priv = netdev_priv(dev); | |
1da177e4 | 605 | INIT_LIST_HEAD(&priv->ip_node_list); |
1da177e4 LT |
606 | spin_lock_init(&priv->lock); |
607 | priv->host = host; | |
608 | priv->local_fifo = fifo_addr; | |
7a97bc03 SR |
609 | INIT_WORK(&priv->wake, ether1394_wake_queue); |
610 | priv->wake_dev = dev; | |
1da177e4 LT |
611 | |
612 | hi = hpsb_create_hostinfo(ð1394_highlevel, host, sizeof(*hi)); | |
1da177e4 | 613 | if (hi == NULL) { |
5009d269 | 614 | ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); |
1da177e4 | 615 | goto out; |
efbeccf1 | 616 | } |
1da177e4 | 617 | |
01590d20 | 618 | ether1394_reset_priv(dev, 1); |
1da177e4 | 619 | |
5009d269 SR |
620 | if (register_netdev(dev)) { |
621 | ETH1394_PRINT_G(KERN_ERR, "Cannot register the driver\n"); | |
1da177e4 LT |
622 | goto out; |
623 | } | |
624 | ||
5009d269 SR |
625 | ETH1394_PRINT(KERN_INFO, dev->name, "IPv4 over IEEE 1394 (fw-host%d)\n", |
626 | host->id); | |
1da177e4 LT |
627 | |
628 | hi->host = host; | |
629 | hi->dev = dev; | |
630 | ||
631 | /* Ignore validity in hopes that it will be set in the future. It'll | |
632 | * be checked when the eth device is opened. */ | |
633 | priv->broadcast_channel = host->csr.broadcast_channel & 0x3f; | |
634 | ||
5009d269 | 635 | ether1394_recv_init(priv); |
1da177e4 | 636 | return; |
1da177e4 | 637 | out: |
157188cb | 638 | if (dev) |
1da177e4 LT |
639 | free_netdev(dev); |
640 | if (hi) | |
641 | hpsb_destroy_hostinfo(ð1394_highlevel, host); | |
157188cb | 642 | hpsb_unregister_addrspace(ð1394_highlevel, host, fifo_addr); |
70093cfd | 643 | hpsb_config_rom_ip1394_remove(host); |
1da177e4 LT |
644 | } |
645 | ||
646 | /* Remove a card from our list */ | |
efbeccf1 | 647 | static void ether1394_remove_host(struct hpsb_host *host) |
1da177e4 LT |
648 | { |
649 | struct eth1394_host_info *hi; | |
2cd556ae | 650 | struct eth1394_priv *priv; |
1da177e4 LT |
651 | |
652 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
2cd556ae SR |
653 | if (!hi) |
654 | return; | |
655 | priv = netdev_priv(hi->dev); | |
656 | hpsb_unregister_addrspace(ð1394_highlevel, host, priv->local_fifo); | |
70093cfd | 657 | hpsb_config_rom_ip1394_remove(host); |
2cd556ae SR |
658 | if (priv->iso) |
659 | hpsb_iso_shutdown(priv->iso); | |
660 | unregister_netdev(hi->dev); | |
661 | free_netdev(hi->dev); | |
1da177e4 LT |
662 | } |
663 | ||
efbeccf1 SR |
664 | /* A bus reset happened */ |
665 | static void ether1394_host_reset(struct hpsb_host *host) | |
1da177e4 LT |
666 | { |
667 | struct eth1394_host_info *hi; | |
668 | struct eth1394_priv *priv; | |
669 | struct net_device *dev; | |
670 | struct list_head *lh, *n; | |
671 | struct eth1394_node_ref *node; | |
672 | struct eth1394_node_info *node_info; | |
673 | unsigned long flags; | |
674 | ||
675 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
676 | ||
677 | /* This can happen for hosts that we don't use */ | |
2cd556ae | 678 | if (!hi) |
1da177e4 LT |
679 | return; |
680 | ||
681 | dev = hi->dev; | |
efbeccf1 | 682 | priv = netdev_priv(dev); |
1da177e4 | 683 | |
efbeccf1 SR |
684 | /* Reset our private host data, but not our MTU */ |
685 | netif_stop_queue(dev); | |
686 | ether1394_reset_priv(dev, 0); | |
1da177e4 LT |
687 | |
688 | list_for_each_entry(node, &priv->ip_node_list, list) { | |
efbeccf1 | 689 | node_info = node->ud->device.driver_data; |
1da177e4 LT |
690 | |
691 | spin_lock_irqsave(&node_info->pdg.lock, flags); | |
692 | ||
efbeccf1 | 693 | list_for_each_safe(lh, n, &node_info->pdg.list) |
1da177e4 | 694 | purge_partial_datagram(lh); |
1da177e4 LT |
695 | |
696 | INIT_LIST_HEAD(&(node_info->pdg.list)); | |
697 | node_info->pdg.sz = 0; | |
698 | ||
699 | spin_unlock_irqrestore(&node_info->pdg.lock, flags); | |
700 | } | |
701 | ||
efbeccf1 | 702 | netif_wake_queue(dev); |
1da177e4 LT |
703 | } |
704 | ||
705 | /****************************************** | |
706 | * HW Header net device functions | |
707 | ******************************************/ | |
708 | /* These functions have been adapted from net/ethernet/eth.c */ | |
709 | ||
1da177e4 LT |
710 | /* Create a fake MAC header for an arbitrary protocol layer. |
711 | * saddr=NULL means use device source address | |
712 | * daddr=NULL means leave destination address (eg unresolved arp). */ | |
713 | static int ether1394_header(struct sk_buff *skb, struct net_device *dev, | |
714 | unsigned short type, void *daddr, void *saddr, | |
715 | unsigned len) | |
716 | { | |
efbeccf1 SR |
717 | struct eth1394hdr *eth = |
718 | (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN); | |
1da177e4 LT |
719 | |
720 | eth->h_proto = htons(type); | |
721 | ||
efbeccf1 | 722 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) { |
1da177e4 | 723 | memset(eth->h_dest, 0, dev->addr_len); |
efbeccf1 | 724 | return dev->hard_header_len; |
1da177e4 LT |
725 | } |
726 | ||
727 | if (daddr) { | |
efbeccf1 | 728 | memcpy(eth->h_dest, daddr, dev->addr_len); |
1da177e4 LT |
729 | return dev->hard_header_len; |
730 | } | |
731 | ||
732 | return -dev->hard_header_len; | |
1da177e4 LT |
733 | } |
734 | ||
1da177e4 LT |
735 | /* Rebuild the faked MAC header. This is called after an ARP |
736 | * (or in future other address resolution) has completed on this | |
737 | * sk_buff. We now let ARP fill in the other fields. | |
738 | * | |
739 | * This routine CANNOT use cached dst->neigh! | |
740 | * Really, it is used only when dst->neigh is wrong. | |
741 | */ | |
742 | static int ether1394_rebuild_header(struct sk_buff *skb) | |
743 | { | |
744 | struct eth1394hdr *eth = (struct eth1394hdr *)skb->data; | |
1da177e4 | 745 | |
599bba96 | 746 | if (eth->h_proto == htons(ETH_P_IP)) |
efbeccf1 | 747 | return arp_find((unsigned char *)ð->h_dest, skb); |
1da177e4 | 748 | |
599bba96 SR |
749 | ETH1394_PRINT(KERN_DEBUG, skb->dev->name, |
750 | "unable to resolve type %04x addresses\n", | |
751 | ntohs(eth->h_proto)); | |
1da177e4 LT |
752 | return 0; |
753 | } | |
754 | ||
755 | static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr) | |
756 | { | |
757 | struct net_device *dev = skb->dev; | |
efbeccf1 | 758 | |
1da177e4 LT |
759 | memcpy(haddr, dev->dev_addr, ETH1394_ALEN); |
760 | return ETH1394_ALEN; | |
761 | } | |
762 | ||
1da177e4 LT |
763 | static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh) |
764 | { | |
765 | unsigned short type = hh->hh_type; | |
1da177e4 | 766 | struct net_device *dev = neigh->dev; |
efbeccf1 SR |
767 | struct eth1394hdr *eth = |
768 | (struct eth1394hdr *)((u8 *)hh->hh_data + 16 - ETH1394_HLEN); | |
1da177e4 | 769 | |
7136b807 | 770 | if (type == htons(ETH_P_802_3)) |
1da177e4 | 771 | return -1; |
1da177e4 LT |
772 | |
773 | eth->h_proto = type; | |
774 | memcpy(eth->h_dest, neigh->ha, dev->addr_len); | |
775 | ||
776 | hh->hh_len = ETH1394_HLEN; | |
777 | return 0; | |
778 | } | |
779 | ||
780 | /* Called by Address Resolution module to notify changes in address. */ | |
781 | static void ether1394_header_cache_update(struct hh_cache *hh, | |
782 | struct net_device *dev, | |
783 | unsigned char * haddr) | |
784 | { | |
efbeccf1 | 785 | memcpy((u8 *)hh->hh_data + 16 - ETH1394_HLEN, haddr, dev->addr_len); |
1da177e4 LT |
786 | } |
787 | ||
1da177e4 LT |
788 | /****************************************** |
789 | * Datagram reception code | |
790 | ******************************************/ | |
791 | ||
792 | /* Copied from net/ethernet/eth.c */ | |
e00f04a7 | 793 | static u16 ether1394_type_trans(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
794 | { |
795 | struct eth1394hdr *eth; | |
796 | unsigned char *rawp; | |
797 | ||
459a98ed | 798 | skb_reset_mac_header(skb); |
efbeccf1 | 799 | skb_pull(skb, ETH1394_HLEN); |
1da177e4 LT |
800 | eth = eth1394_hdr(skb); |
801 | ||
802 | if (*eth->h_dest & 1) { | |
efbeccf1 | 803 | if (memcmp(eth->h_dest, dev->broadcast, dev->addr_len) == 0) |
1da177e4 LT |
804 | skb->pkt_type = PACKET_BROADCAST; |
805 | #if 0 | |
806 | else | |
807 | skb->pkt_type = PACKET_MULTICAST; | |
808 | #endif | |
809 | } else { | |
810 | if (memcmp(eth->h_dest, dev->dev_addr, dev->addr_len)) | |
811 | skb->pkt_type = PACKET_OTHERHOST; | |
efbeccf1 | 812 | } |
1da177e4 | 813 | |
efbeccf1 | 814 | if (ntohs(eth->h_proto) >= 1536) |
1da177e4 LT |
815 | return eth->h_proto; |
816 | ||
817 | rawp = skb->data; | |
818 | ||
efbeccf1 SR |
819 | if (*(unsigned short *)rawp == 0xFFFF) |
820 | return htons(ETH_P_802_3); | |
1da177e4 | 821 | |
efbeccf1 | 822 | return htons(ETH_P_802_2); |
1da177e4 LT |
823 | } |
824 | ||
825 | /* Parse an encapsulated IP1394 header into an ethernet frame packet. | |
826 | * We also perform ARP translation here, if need be. */ | |
e00f04a7 SR |
827 | static u16 ether1394_parse_encap(struct sk_buff *skb, struct net_device *dev, |
828 | nodeid_t srcid, nodeid_t destid, | |
829 | u16 ether_type) | |
1da177e4 LT |
830 | { |
831 | struct eth1394_priv *priv = netdev_priv(dev); | |
832 | u64 dest_hw; | |
833 | unsigned short ret = 0; | |
834 | ||
efbeccf1 | 835 | /* Setup our hw addresses. We use these to build the ethernet header. */ |
1da177e4 LT |
836 | if (destid == (LOCAL_BUS | ALL_NODES)) |
837 | dest_hw = ~0ULL; /* broadcast */ | |
838 | else | |
efbeccf1 | 839 | dest_hw = cpu_to_be64((u64)priv->host->csr.guid_hi << 32 | |
1da177e4 LT |
840 | priv->host->csr.guid_lo); |
841 | ||
842 | /* If this is an ARP packet, convert it. First, we want to make | |
843 | * use of some of the fields, since they tell us a little bit | |
844 | * about the sending machine. */ | |
7136b807 | 845 | if (ether_type == htons(ETH_P_ARP)) { |
efbeccf1 | 846 | struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data; |
1da177e4 LT |
847 | struct arphdr *arp = (struct arphdr *)skb->data; |
848 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
849 | u64 fifo_addr = (u64)ntohs(arp1394->fifo_hi) << 32 | | |
efbeccf1 | 850 | ntohl(arp1394->fifo_lo); |
1da177e4 LT |
851 | u8 max_rec = min(priv->host->csr.max_rec, |
852 | (u8)(arp1394->max_rec)); | |
853 | int sspd = arp1394->sspd; | |
854 | u16 maxpayload; | |
855 | struct eth1394_node_ref *node; | |
856 | struct eth1394_node_info *node_info; | |
c20e3945 | 857 | __be64 guid; |
1da177e4 LT |
858 | |
859 | /* Sanity check. MacOSX seems to be sending us 131 in this | |
860 | * field (atleast on my Panther G5). Not sure why. */ | |
861 | if (sspd > 5 || sspd < 0) | |
862 | sspd = 0; | |
863 | ||
efbeccf1 SR |
864 | maxpayload = min(eth1394_speedto_maxpayload[sspd], |
865 | (u16)(1 << (max_rec + 1))); | |
1da177e4 | 866 | |
c20e3945 | 867 | guid = get_unaligned(&arp1394->s_uniq_id); |
1da177e4 | 868 | node = eth1394_find_node_guid(&priv->ip_node_list, |
c20e3945 | 869 | be64_to_cpu(guid)); |
efbeccf1 | 870 | if (!node) |
1da177e4 | 871 | return 0; |
1da177e4 | 872 | |
efbeccf1 SR |
873 | node_info = |
874 | (struct eth1394_node_info *)node->ud->device.driver_data; | |
1da177e4 LT |
875 | |
876 | /* Update our speed/payload/fifo_offset table */ | |
877 | node_info->maxpayload = maxpayload; | |
878 | node_info->sspd = sspd; | |
879 | node_info->fifo = fifo_addr; | |
880 | ||
881 | /* Now that we're done with the 1394 specific stuff, we'll | |
882 | * need to alter some of the data. Believe it or not, all | |
883 | * that needs to be done is sender_IP_address needs to be | |
884 | * moved, the destination hardware address get stuffed | |
885 | * in and the hardware address length set to 8. | |
886 | * | |
887 | * IMPORTANT: The code below overwrites 1394 specific data | |
888 | * needed above so keep the munging of the data for the | |
889 | * higher level IP stack last. */ | |
890 | ||
891 | arp->ar_hln = 8; | |
892 | arp_ptr += arp->ar_hln; /* skip over sender unique id */ | |
efbeccf1 | 893 | *(u32 *)arp_ptr = arp1394->sip; /* move sender IP addr */ |
1da177e4 LT |
894 | arp_ptr += arp->ar_pln; /* skip over sender IP addr */ |
895 | ||
02f4213f | 896 | if (arp->ar_op == htons(ARPOP_REQUEST)) |
c20e3945 | 897 | memset(arp_ptr, 0, sizeof(u64)); |
1da177e4 | 898 | else |
c20e3945 | 899 | memcpy(arp_ptr, dev->dev_addr, sizeof(u64)); |
1da177e4 LT |
900 | } |
901 | ||
902 | /* Now add the ethernet header. */ | |
7136b807 BC |
903 | if (dev->hard_header(skb, dev, ntohs(ether_type), &dest_hw, NULL, |
904 | skb->len) >= 0) | |
1da177e4 LT |
905 | ret = ether1394_type_trans(skb, dev); |
906 | ||
907 | return ret; | |
908 | } | |
909 | ||
e00f04a7 | 910 | static int fragment_overlap(struct list_head *frag_list, int offset, int len) |
1da177e4 LT |
911 | { |
912 | struct fragment_info *fi; | |
2e2173df | 913 | int end = offset + len; |
1da177e4 | 914 | |
2e2173df SR |
915 | list_for_each_entry(fi, frag_list, list) |
916 | if (offset < fi->offset + fi->len && end > fi->offset) | |
1da177e4 | 917 | return 1; |
2e2173df | 918 | |
1da177e4 LT |
919 | return 0; |
920 | } | |
921 | ||
e00f04a7 | 922 | static struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl) |
1da177e4 LT |
923 | { |
924 | struct partial_datagram *pd; | |
925 | ||
efbeccf1 | 926 | list_for_each_entry(pd, pdgl, list) |
1da177e4 LT |
927 | if (pd->dgl == dgl) |
928 | return &pd->list; | |
efbeccf1 | 929 | |
1da177e4 LT |
930 | return NULL; |
931 | } | |
932 | ||
933 | /* Assumes that new fragment does not overlap any existing fragments */ | |
e00f04a7 | 934 | static int new_fragment(struct list_head *frag_info, int offset, int len) |
1da177e4 LT |
935 | { |
936 | struct list_head *lh; | |
937 | struct fragment_info *fi, *fi2, *new; | |
938 | ||
939 | list_for_each(lh, frag_info) { | |
940 | fi = list_entry(lh, struct fragment_info, list); | |
efbeccf1 | 941 | if (fi->offset + fi->len == offset) { |
1da177e4 LT |
942 | /* The new fragment can be tacked on to the end */ |
943 | fi->len += len; | |
944 | /* Did the new fragment plug a hole? */ | |
945 | fi2 = list_entry(lh->next, struct fragment_info, list); | |
efbeccf1 | 946 | if (fi->offset + fi->len == fi2->offset) { |
1da177e4 LT |
947 | /* glue fragments together */ |
948 | fi->len += fi2->len; | |
949 | list_del(lh->next); | |
950 | kfree(fi2); | |
951 | } | |
952 | return 0; | |
efbeccf1 | 953 | } else if (offset + len == fi->offset) { |
1da177e4 LT |
954 | /* The new fragment can be tacked on to the beginning */ |
955 | fi->offset = offset; | |
956 | fi->len += len; | |
957 | /* Did the new fragment plug a hole? */ | |
958 | fi2 = list_entry(lh->prev, struct fragment_info, list); | |
efbeccf1 | 959 | if (fi2->offset + fi2->len == fi->offset) { |
1da177e4 LT |
960 | /* glue fragments together */ |
961 | fi2->len += fi->len; | |
962 | list_del(lh); | |
963 | kfree(fi); | |
964 | } | |
965 | return 0; | |
efbeccf1 | 966 | } else if (offset > fi->offset + fi->len) { |
1da177e4 | 967 | break; |
efbeccf1 | 968 | } else if (offset + len < fi->offset) { |
1da177e4 LT |
969 | lh = lh->prev; |
970 | break; | |
971 | } | |
972 | } | |
973 | ||
8551158a | 974 | new = kmalloc(sizeof(*new), GFP_ATOMIC); |
1da177e4 LT |
975 | if (!new) |
976 | return -ENOMEM; | |
977 | ||
978 | new->offset = offset; | |
979 | new->len = len; | |
980 | ||
981 | list_add(&new->list, lh); | |
1da177e4 LT |
982 | return 0; |
983 | } | |
984 | ||
e00f04a7 SR |
985 | static int new_partial_datagram(struct net_device *dev, struct list_head *pdgl, |
986 | int dgl, int dg_size, char *frag_buf, | |
987 | int frag_off, int frag_len) | |
1da177e4 LT |
988 | { |
989 | struct partial_datagram *new; | |
990 | ||
8551158a | 991 | new = kmalloc(sizeof(*new), GFP_ATOMIC); |
1da177e4 LT |
992 | if (!new) |
993 | return -ENOMEM; | |
994 | ||
995 | INIT_LIST_HEAD(&new->frag_info); | |
996 | ||
997 | if (new_fragment(&new->frag_info, frag_off, frag_len) < 0) { | |
998 | kfree(new); | |
999 | return -ENOMEM; | |
1000 | } | |
1001 | ||
1002 | new->dgl = dgl; | |
1003 | new->dg_size = dg_size; | |
1004 | ||
1005 | new->skb = dev_alloc_skb(dg_size + dev->hard_header_len + 15); | |
1006 | if (!new->skb) { | |
1007 | struct fragment_info *fi = list_entry(new->frag_info.next, | |
1008 | struct fragment_info, | |
1009 | list); | |
1010 | kfree(fi); | |
1011 | kfree(new); | |
1012 | return -ENOMEM; | |
1013 | } | |
1014 | ||
1015 | skb_reserve(new->skb, (dev->hard_header_len + 15) & ~15); | |
1016 | new->pbuf = skb_put(new->skb, dg_size); | |
1017 | memcpy(new->pbuf + frag_off, frag_buf, frag_len); | |
1018 | ||
1019 | list_add(&new->list, pdgl); | |
1da177e4 LT |
1020 | return 0; |
1021 | } | |
1022 | ||
e00f04a7 SR |
1023 | static int update_partial_datagram(struct list_head *pdgl, struct list_head *lh, |
1024 | char *frag_buf, int frag_off, int frag_len) | |
1da177e4 | 1025 | { |
efbeccf1 SR |
1026 | struct partial_datagram *pd = |
1027 | list_entry(lh, struct partial_datagram, list); | |
1da177e4 | 1028 | |
efbeccf1 | 1029 | if (new_fragment(&pd->frag_info, frag_off, frag_len) < 0) |
1da177e4 | 1030 | return -ENOMEM; |
1da177e4 LT |
1031 | |
1032 | memcpy(pd->pbuf + frag_off, frag_buf, frag_len); | |
1033 | ||
1034 | /* Move list entry to beginnig of list so that oldest partial | |
1035 | * datagrams percolate to the end of the list */ | |
179e0917 | 1036 | list_move(lh, pdgl); |
1da177e4 LT |
1037 | return 0; |
1038 | } | |
1039 | ||
e00f04a7 | 1040 | static int is_datagram_complete(struct list_head *lh, int dg_size) |
1da177e4 | 1041 | { |
e00f04a7 SR |
1042 | struct partial_datagram *pd; |
1043 | struct fragment_info *fi; | |
1044 | ||
1045 | pd = list_entry(lh, struct partial_datagram, list); | |
1046 | fi = list_entry(pd->frag_info.next, struct fragment_info, list); | |
1da177e4 LT |
1047 | |
1048 | return (fi->len == dg_size); | |
1049 | } | |
1050 | ||
1051 | /* Packet reception. We convert the IP1394 encapsulation header to an | |
1052 | * ethernet header, and fill it with some of our other fields. This is | |
1053 | * an incoming packet from the 1394 bus. */ | |
1054 | static int ether1394_data_handler(struct net_device *dev, int srcid, int destid, | |
1055 | char *buf, int len) | |
1056 | { | |
1057 | struct sk_buff *skb; | |
1058 | unsigned long flags; | |
1059 | struct eth1394_priv *priv = netdev_priv(dev); | |
1060 | union eth1394_hdr *hdr = (union eth1394_hdr *)buf; | |
1061 | u16 ether_type = 0; /* initialized to clear warning */ | |
1062 | int hdr_len; | |
1063 | struct unit_directory *ud = priv->ud_list[NODEID_TO_NODE(srcid)]; | |
1064 | struct eth1394_node_info *node_info; | |
1065 | ||
1066 | if (!ud) { | |
1067 | struct eth1394_node_ref *node; | |
1068 | node = eth1394_find_node_nodeid(&priv->ip_node_list, srcid); | |
09939871 | 1069 | if (unlikely(!node)) { |
1da177e4 LT |
1070 | HPSB_PRINT(KERN_ERR, "ether1394 rx: sender nodeid " |
1071 | "lookup failure: " NODE_BUS_FMT, | |
1072 | NODE_BUS_ARGS(priv->host, srcid)); | |
1073 | priv->stats.rx_dropped++; | |
1074 | return -1; | |
1075 | } | |
1076 | ud = node->ud; | |
1077 | ||
1078 | priv->ud_list[NODEID_TO_NODE(srcid)] = ud; | |
1079 | } | |
1080 | ||
efbeccf1 | 1081 | node_info = (struct eth1394_node_info *)ud->device.driver_data; |
1da177e4 LT |
1082 | |
1083 | /* First, did we receive a fragmented or unfragmented datagram? */ | |
1084 | hdr->words.word1 = ntohs(hdr->words.word1); | |
1085 | ||
1086 | hdr_len = hdr_type_len[hdr->common.lf]; | |
1087 | ||
1088 | if (hdr->common.lf == ETH1394_HDR_LF_UF) { | |
1089 | /* An unfragmented datagram has been received by the ieee1394 | |
1090 | * bus. Build an skbuff around it so we can pass it to the | |
1091 | * high level network layer. */ | |
1092 | ||
1093 | skb = dev_alloc_skb(len + dev->hard_header_len + 15); | |
09939871 | 1094 | if (unlikely(!skb)) { |
5009d269 | 1095 | ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); |
1da177e4 LT |
1096 | priv->stats.rx_dropped++; |
1097 | return -1; | |
1098 | } | |
1099 | skb_reserve(skb, (dev->hard_header_len + 15) & ~15); | |
efbeccf1 SR |
1100 | memcpy(skb_put(skb, len - hdr_len), buf + hdr_len, |
1101 | len - hdr_len); | |
1da177e4 LT |
1102 | ether_type = hdr->uf.ether_type; |
1103 | } else { | |
1104 | /* A datagram fragment has been received, now the fun begins. */ | |
1105 | ||
1106 | struct list_head *pdgl, *lh; | |
1107 | struct partial_datagram *pd; | |
1108 | int fg_off; | |
1109 | int fg_len = len - hdr_len; | |
1110 | int dg_size; | |
1111 | int dgl; | |
1112 | int retval; | |
1113 | struct pdg_list *pdg = &(node_info->pdg); | |
1114 | ||
1115 | hdr->words.word3 = ntohs(hdr->words.word3); | |
1116 | /* The 4th header word is reserved so no need to do ntohs() */ | |
1117 | ||
1118 | if (hdr->common.lf == ETH1394_HDR_LF_FF) { | |
1119 | ether_type = hdr->ff.ether_type; | |
1120 | dgl = hdr->ff.dgl; | |
1121 | dg_size = hdr->ff.dg_size + 1; | |
1122 | fg_off = 0; | |
1123 | } else { | |
1124 | hdr->words.word2 = ntohs(hdr->words.word2); | |
1125 | dgl = hdr->sf.dgl; | |
1126 | dg_size = hdr->sf.dg_size + 1; | |
1127 | fg_off = hdr->sf.fg_off; | |
1128 | } | |
1129 | spin_lock_irqsave(&pdg->lock, flags); | |
1130 | ||
1131 | pdgl = &(pdg->list); | |
1132 | lh = find_partial_datagram(pdgl, dgl); | |
1133 | ||
1134 | if (lh == NULL) { | |
1135 | while (pdg->sz >= max_partial_datagrams) { | |
1136 | /* remove the oldest */ | |
1137 | purge_partial_datagram(pdgl->prev); | |
1138 | pdg->sz--; | |
1139 | } | |
1140 | ||
1141 | retval = new_partial_datagram(dev, pdgl, dgl, dg_size, | |
1142 | buf + hdr_len, fg_off, | |
1143 | fg_len); | |
1144 | if (retval < 0) { | |
1145 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1146 | goto bad_proto; | |
1147 | } | |
1148 | pdg->sz++; | |
1149 | lh = find_partial_datagram(pdgl, dgl); | |
1150 | } else { | |
1151 | struct partial_datagram *pd; | |
1152 | ||
1153 | pd = list_entry(lh, struct partial_datagram, list); | |
1154 | ||
1155 | if (fragment_overlap(&pd->frag_info, fg_off, fg_len)) { | |
1156 | /* Overlapping fragments, obliterate old | |
1157 | * datagram and start new one. */ | |
1158 | purge_partial_datagram(lh); | |
1159 | retval = new_partial_datagram(dev, pdgl, dgl, | |
1160 | dg_size, | |
1161 | buf + hdr_len, | |
1162 | fg_off, fg_len); | |
1163 | if (retval < 0) { | |
1164 | pdg->sz--; | |
1165 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1166 | goto bad_proto; | |
1167 | } | |
1168 | } else { | |
1169 | retval = update_partial_datagram(pdgl, lh, | |
1170 | buf + hdr_len, | |
1171 | fg_off, fg_len); | |
1172 | if (retval < 0) { | |
1173 | /* Couldn't save off fragment anyway | |
1174 | * so might as well obliterate the | |
1175 | * datagram now. */ | |
1176 | purge_partial_datagram(lh); | |
1177 | pdg->sz--; | |
1178 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1179 | goto bad_proto; | |
1180 | } | |
1181 | } /* fragment overlap */ | |
1182 | } /* new datagram or add to existing one */ | |
1183 | ||
1184 | pd = list_entry(lh, struct partial_datagram, list); | |
1185 | ||
efbeccf1 | 1186 | if (hdr->common.lf == ETH1394_HDR_LF_FF) |
1da177e4 | 1187 | pd->ether_type = ether_type; |
1da177e4 LT |
1188 | |
1189 | if (is_datagram_complete(lh, dg_size)) { | |
1190 | ether_type = pd->ether_type; | |
1191 | pdg->sz--; | |
1192 | skb = skb_get(pd->skb); | |
1193 | purge_partial_datagram(lh); | |
1194 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1195 | } else { | |
1196 | /* Datagram is not complete, we're done for the | |
1197 | * moment. */ | |
1198 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1199 | return 0; | |
1200 | } | |
1201 | } /* unframgented datagram or fragmented one */ | |
1202 | ||
1203 | /* Write metadata, and then pass to the receive level */ | |
1204 | skb->dev = dev; | |
1205 | skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */ | |
1206 | ||
1207 | /* Parse the encapsulation header. This actually does the job of | |
1208 | * converting to an ethernet frame header, aswell as arp | |
1209 | * conversion if needed. ARP conversion is easier in this | |
1210 | * direction, since we are using ethernet as our backend. */ | |
1211 | skb->protocol = ether1394_parse_encap(skb, dev, srcid, destid, | |
1212 | ether_type); | |
1213 | ||
1da177e4 | 1214 | spin_lock_irqsave(&priv->lock, flags); |
efbeccf1 | 1215 | |
1da177e4 LT |
1216 | if (!skb->protocol) { |
1217 | priv->stats.rx_errors++; | |
1218 | priv->stats.rx_dropped++; | |
1219 | dev_kfree_skb_any(skb); | |
1220 | goto bad_proto; | |
1221 | } | |
1222 | ||
1223 | if (netif_rx(skb) == NET_RX_DROP) { | |
1224 | priv->stats.rx_errors++; | |
1225 | priv->stats.rx_dropped++; | |
1226 | goto bad_proto; | |
1227 | } | |
1228 | ||
1229 | /* Statistics */ | |
1230 | priv->stats.rx_packets++; | |
1231 | priv->stats.rx_bytes += skb->len; | |
1232 | ||
1233 | bad_proto: | |
1234 | if (netif_queue_stopped(dev)) | |
1235 | netif_wake_queue(dev); | |
1236 | spin_unlock_irqrestore(&priv->lock, flags); | |
1237 | ||
1238 | dev->last_rx = jiffies; | |
1239 | ||
1240 | return 0; | |
1241 | } | |
1242 | ||
1243 | static int ether1394_write(struct hpsb_host *host, int srcid, int destid, | |
1244 | quadlet_t *data, u64 addr, size_t len, u16 flags) | |
1245 | { | |
1246 | struct eth1394_host_info *hi; | |
1247 | ||
1248 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
09939871 | 1249 | if (unlikely(!hi)) { |
5009d269 SR |
1250 | ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n", |
1251 | host->id); | |
1da177e4 LT |
1252 | return RCODE_ADDRESS_ERROR; |
1253 | } | |
1254 | ||
1255 | if (ether1394_data_handler(hi->dev, srcid, destid, (char*)data, len)) | |
1256 | return RCODE_ADDRESS_ERROR; | |
1257 | else | |
1258 | return RCODE_COMPLETE; | |
1259 | } | |
1260 | ||
1261 | static void ether1394_iso(struct hpsb_iso *iso) | |
1262 | { | |
1263 | quadlet_t *data; | |
1264 | char *buf; | |
1265 | struct eth1394_host_info *hi; | |
1266 | struct net_device *dev; | |
1267 | struct eth1394_priv *priv; | |
1268 | unsigned int len; | |
1269 | u32 specifier_id; | |
1270 | u16 source_id; | |
1271 | int i; | |
1272 | int nready; | |
1273 | ||
1274 | hi = hpsb_get_hostinfo(ð1394_highlevel, iso->host); | |
09939871 | 1275 | if (unlikely(!hi)) { |
5009d269 SR |
1276 | ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n", |
1277 | iso->host->id); | |
1da177e4 LT |
1278 | return; |
1279 | } | |
1280 | ||
1281 | dev = hi->dev; | |
1282 | ||
1283 | nready = hpsb_iso_n_ready(iso); | |
1284 | for (i = 0; i < nready; i++) { | |
1285 | struct hpsb_iso_packet_info *info = | |
1286 | &iso->infos[(iso->first_packet + i) % iso->buf_packets]; | |
efbeccf1 | 1287 | data = (quadlet_t *)(iso->data_buf.kvirt + info->offset); |
1da177e4 LT |
1288 | |
1289 | /* skip over GASP header */ | |
1290 | buf = (char *)data + 8; | |
1291 | len = info->len - 8; | |
1292 | ||
efbeccf1 SR |
1293 | specifier_id = (be32_to_cpu(data[0]) & 0xffff) << 8 | |
1294 | (be32_to_cpu(data[1]) & 0xff000000) >> 24; | |
1da177e4 LT |
1295 | source_id = be32_to_cpu(data[0]) >> 16; |
1296 | ||
1297 | priv = netdev_priv(dev); | |
1298 | ||
efbeccf1 SR |
1299 | if (info->channel != (iso->host->csr.broadcast_channel & 0x3f) |
1300 | || specifier_id != ETHER1394_GASP_SPECIFIER_ID) { | |
1da177e4 LT |
1301 | /* This packet is not for us */ |
1302 | continue; | |
1303 | } | |
1304 | ether1394_data_handler(dev, source_id, LOCAL_BUS | ALL_NODES, | |
1305 | buf, len); | |
1306 | } | |
1307 | ||
1308 | hpsb_iso_recv_release_packets(iso, i); | |
1309 | ||
1310 | dev->last_rx = jiffies; | |
1311 | } | |
1312 | ||
1313 | /****************************************** | |
1314 | * Datagram transmission code | |
1315 | ******************************************/ | |
1316 | ||
1317 | /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire | |
1318 | * arphdr) is the same format as the ip1394 header, so they overlap. The rest | |
1319 | * needs to be munged a bit. The remainder of the arphdr is formatted based | |
1320 | * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to | |
1321 | * judge. | |
1322 | * | |
1323 | * Now that the EUI is used for the hardware address all we need to do to make | |
1324 | * this work for 1394 is to insert 2 quadlets that contain max_rec size, | |
1325 | * speed, and unicast FIFO address information between the sender_unique_id | |
1326 | * and the IP addresses. | |
1327 | */ | |
e00f04a7 SR |
1328 | static void ether1394_arp_to_1394arp(struct sk_buff *skb, |
1329 | struct net_device *dev) | |
1da177e4 LT |
1330 | { |
1331 | struct eth1394_priv *priv = netdev_priv(dev); | |
1da177e4 LT |
1332 | struct arphdr *arp = (struct arphdr *)skb->data; |
1333 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
1334 | struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data; | |
1335 | ||
1da177e4 LT |
1336 | arp1394->hw_addr_len = 16; |
1337 | arp1394->sip = *(u32*)(arp_ptr + ETH1394_ALEN); | |
1338 | arp1394->max_rec = priv->host->csr.max_rec; | |
1339 | arp1394->sspd = priv->host->csr.lnk_spd; | |
efbeccf1 SR |
1340 | arp1394->fifo_hi = htons(priv->local_fifo >> 32); |
1341 | arp1394->fifo_lo = htonl(priv->local_fifo & ~0x0); | |
1da177e4 LT |
1342 | } |
1343 | ||
1344 | /* We need to encapsulate the standard header with our own. We use the | |
1345 | * ethernet header's proto for our own. */ | |
e00f04a7 SR |
1346 | static unsigned int ether1394_encapsulate_prep(unsigned int max_payload, |
1347 | __be16 proto, | |
1348 | union eth1394_hdr *hdr, | |
1349 | u16 dg_size, u16 dgl) | |
1da177e4 | 1350 | { |
efbeccf1 SR |
1351 | unsigned int adj_max_payload = |
1352 | max_payload - hdr_type_len[ETH1394_HDR_LF_UF]; | |
1da177e4 LT |
1353 | |
1354 | /* Does it all fit in one packet? */ | |
1355 | if (dg_size <= adj_max_payload) { | |
1356 | hdr->uf.lf = ETH1394_HDR_LF_UF; | |
1357 | hdr->uf.ether_type = proto; | |
1358 | } else { | |
1359 | hdr->ff.lf = ETH1394_HDR_LF_FF; | |
1360 | hdr->ff.ether_type = proto; | |
1361 | hdr->ff.dg_size = dg_size - 1; | |
1362 | hdr->ff.dgl = dgl; | |
1363 | adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_FF]; | |
1364 | } | |
efbeccf1 | 1365 | return (dg_size + adj_max_payload - 1) / adj_max_payload; |
1da177e4 LT |
1366 | } |
1367 | ||
e00f04a7 SR |
1368 | static unsigned int ether1394_encapsulate(struct sk_buff *skb, |
1369 | unsigned int max_payload, | |
1370 | union eth1394_hdr *hdr) | |
1da177e4 LT |
1371 | { |
1372 | union eth1394_hdr *bufhdr; | |
1373 | int ftype = hdr->common.lf; | |
1374 | int hdrsz = hdr_type_len[ftype]; | |
1375 | unsigned int adj_max_payload = max_payload - hdrsz; | |
1376 | ||
efbeccf1 | 1377 | switch (ftype) { |
1da177e4 LT |
1378 | case ETH1394_HDR_LF_UF: |
1379 | bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz); | |
1380 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1381 | bufhdr->words.word2 = hdr->words.word2; | |
1382 | break; | |
1383 | ||
1384 | case ETH1394_HDR_LF_FF: | |
1385 | bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz); | |
1386 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1387 | bufhdr->words.word2 = hdr->words.word2; | |
1388 | bufhdr->words.word3 = htons(hdr->words.word3); | |
1389 | bufhdr->words.word4 = 0; | |
1390 | ||
1391 | /* Set frag type here for future interior fragments */ | |
1392 | hdr->common.lf = ETH1394_HDR_LF_IF; | |
1393 | hdr->sf.fg_off = 0; | |
1394 | break; | |
1395 | ||
1396 | default: | |
1397 | hdr->sf.fg_off += adj_max_payload; | |
1398 | bufhdr = (union eth1394_hdr *)skb_pull(skb, adj_max_payload); | |
1399 | if (max_payload >= skb->len) | |
1400 | hdr->common.lf = ETH1394_HDR_LF_LF; | |
1401 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1402 | bufhdr->words.word2 = htons(hdr->words.word2); | |
1403 | bufhdr->words.word3 = htons(hdr->words.word3); | |
1404 | bufhdr->words.word4 = 0; | |
1405 | } | |
1da177e4 LT |
1406 | return min(max_payload, skb->len); |
1407 | } | |
1408 | ||
e00f04a7 | 1409 | static struct hpsb_packet *ether1394_alloc_common_packet(struct hpsb_host *host) |
1da177e4 LT |
1410 | { |
1411 | struct hpsb_packet *p; | |
1412 | ||
1413 | p = hpsb_alloc_packet(0); | |
1414 | if (p) { | |
1415 | p->host = host; | |
1416 | p->generation = get_hpsb_generation(host); | |
1417 | p->type = hpsb_async; | |
1418 | } | |
1419 | return p; | |
1420 | } | |
1421 | ||
e00f04a7 SR |
1422 | static int ether1394_prep_write_packet(struct hpsb_packet *p, |
1423 | struct hpsb_host *host, nodeid_t node, | |
efbeccf1 | 1424 | u64 addr, void *data, int tx_len) |
1da177e4 LT |
1425 | { |
1426 | p->node_id = node; | |
1da177e4 | 1427 | |
7a97bc03 SR |
1428 | if (hpsb_get_tlabel(p)) |
1429 | return -EAGAIN; | |
1da177e4 | 1430 | |
7a97bc03 | 1431 | p->tcode = TCODE_WRITEB; |
1da177e4 LT |
1432 | p->header_size = 16; |
1433 | p->expect_response = 1; | |
efbeccf1 SR |
1434 | p->header[0] = |
1435 | p->node_id << 16 | p->tlabel << 10 | 1 << 8 | TCODE_WRITEB << 4; | |
7a97bc03 SR |
1436 | p->header[1] = host->node_id << 16 | addr >> 32; |
1437 | p->header[2] = addr & 0xffffffff; | |
1da177e4 LT |
1438 | p->header[3] = tx_len << 16; |
1439 | p->data_size = (tx_len + 3) & ~3; | |
efbeccf1 | 1440 | p->data = data; |
1da177e4 LT |
1441 | |
1442 | return 0; | |
1443 | } | |
1444 | ||
e00f04a7 SR |
1445 | static void ether1394_prep_gasp_packet(struct hpsb_packet *p, |
1446 | struct eth1394_priv *priv, | |
1447 | struct sk_buff *skb, int length) | |
1da177e4 LT |
1448 | { |
1449 | p->header_size = 4; | |
1450 | p->tcode = TCODE_STREAM_DATA; | |
1451 | ||
efbeccf1 SR |
1452 | p->header[0] = length << 16 | 3 << 14 | priv->broadcast_channel << 8 | |
1453 | TCODE_STREAM_DATA << 4; | |
1da177e4 | 1454 | p->data_size = length; |
efbeccf1 SR |
1455 | p->data = (quadlet_t *)skb->data - 2; |
1456 | p->data[0] = cpu_to_be32(priv->host->node_id << 16 | | |
1da177e4 | 1457 | ETHER1394_GASP_SPECIFIER_ID_HI); |
efbeccf1 | 1458 | p->data[1] = cpu_to_be32(ETHER1394_GASP_SPECIFIER_ID_LO << 24 | |
7136b807 | 1459 | ETHER1394_GASP_VERSION); |
1da177e4 | 1460 | |
1da177e4 | 1461 | p->speed_code = priv->bc_sspd; |
21b2c564 SR |
1462 | |
1463 | /* prevent hpsb_send_packet() from overriding our speed code */ | |
1464 | p->node_id = LOCAL_BUS | ALL_NODES; | |
1da177e4 LT |
1465 | } |
1466 | ||
e00f04a7 | 1467 | static void ether1394_free_packet(struct hpsb_packet *packet) |
1da177e4 LT |
1468 | { |
1469 | if (packet->tcode != TCODE_STREAM_DATA) | |
1470 | hpsb_free_tlabel(packet); | |
1471 | hpsb_free_packet(packet); | |
1472 | } | |
1473 | ||
1474 | static void ether1394_complete_cb(void *__ptask); | |
1475 | ||
1476 | static int ether1394_send_packet(struct packet_task *ptask, unsigned int tx_len) | |
1477 | { | |
1478 | struct eth1394_priv *priv = ptask->priv; | |
1479 | struct hpsb_packet *packet = NULL; | |
1480 | ||
1481 | packet = ether1394_alloc_common_packet(priv->host); | |
1482 | if (!packet) | |
7a97bc03 | 1483 | return -ENOMEM; |
1da177e4 LT |
1484 | |
1485 | if (ptask->tx_type == ETH1394_GASP) { | |
efbeccf1 | 1486 | int length = tx_len + 2 * sizeof(quadlet_t); |
1da177e4 LT |
1487 | |
1488 | ether1394_prep_gasp_packet(packet, priv, ptask->skb, length); | |
1489 | } else if (ether1394_prep_write_packet(packet, priv->host, | |
1490 | ptask->dest_node, | |
1491 | ptask->addr, ptask->skb->data, | |
1492 | tx_len)) { | |
1493 | hpsb_free_packet(packet); | |
7a97bc03 | 1494 | return -EAGAIN; |
1da177e4 LT |
1495 | } |
1496 | ||
1497 | ptask->packet = packet; | |
1498 | hpsb_set_packet_complete_task(ptask->packet, ether1394_complete_cb, | |
1499 | ptask); | |
1500 | ||
1501 | if (hpsb_send_packet(packet) < 0) { | |
1502 | ether1394_free_packet(packet); | |
7a97bc03 | 1503 | return -EIO; |
1da177e4 LT |
1504 | } |
1505 | ||
1506 | return 0; | |
1507 | } | |
1508 | ||
1da177e4 | 1509 | /* Task function to be run when a datagram transmission is completed */ |
e00f04a7 | 1510 | static void ether1394_dg_complete(struct packet_task *ptask, int fail) |
1da177e4 LT |
1511 | { |
1512 | struct sk_buff *skb = ptask->skb; | |
efbeccf1 | 1513 | struct eth1394_priv *priv = netdev_priv(skb->dev); |
1da177e4 LT |
1514 | unsigned long flags; |
1515 | ||
1516 | /* Statistics */ | |
1517 | spin_lock_irqsave(&priv->lock, flags); | |
1518 | if (fail) { | |
1519 | priv->stats.tx_dropped++; | |
1520 | priv->stats.tx_errors++; | |
1521 | } else { | |
1522 | priv->stats.tx_bytes += skb->len; | |
1523 | priv->stats.tx_packets++; | |
1524 | } | |
1525 | spin_unlock_irqrestore(&priv->lock, flags); | |
1526 | ||
1527 | dev_kfree_skb_any(skb); | |
1528 | kmem_cache_free(packet_task_cache, ptask); | |
1529 | } | |
1530 | ||
1da177e4 LT |
1531 | /* Callback for when a packet has been sent and the status of that packet is |
1532 | * known */ | |
1533 | static void ether1394_complete_cb(void *__ptask) | |
1534 | { | |
1535 | struct packet_task *ptask = (struct packet_task *)__ptask; | |
1536 | struct hpsb_packet *packet = ptask->packet; | |
1537 | int fail = 0; | |
1538 | ||
1539 | if (packet->tcode != TCODE_STREAM_DATA) | |
1540 | fail = hpsb_packet_success(packet); | |
1541 | ||
1542 | ether1394_free_packet(packet); | |
1543 | ||
1544 | ptask->outstanding_pkts--; | |
1545 | if (ptask->outstanding_pkts > 0 && !fail) { | |
7a97bc03 | 1546 | int tx_len, err; |
1da177e4 LT |
1547 | |
1548 | /* Add the encapsulation header to the fragment */ | |
1549 | tx_len = ether1394_encapsulate(ptask->skb, ptask->max_payload, | |
1550 | &ptask->hdr); | |
7a97bc03 SR |
1551 | err = ether1394_send_packet(ptask, tx_len); |
1552 | if (err) { | |
1553 | if (err == -EAGAIN) | |
1554 | ETH1394_PRINT_G(KERN_ERR, "Out of tlabels\n"); | |
1555 | ||
1da177e4 | 1556 | ether1394_dg_complete(ptask, 1); |
7a97bc03 | 1557 | } |
1da177e4 LT |
1558 | } else { |
1559 | ether1394_dg_complete(ptask, fail); | |
1560 | } | |
1561 | } | |
1562 | ||
1da177e4 | 1563 | /* Transmit a packet (called by kernel) */ |
efbeccf1 | 1564 | static int ether1394_tx(struct sk_buff *skb, struct net_device *dev) |
1da177e4 | 1565 | { |
18b46179 | 1566 | struct eth1394hdr hdr_buf; |
1da177e4 | 1567 | struct eth1394_priv *priv = netdev_priv(dev); |
02f4213f | 1568 | __be16 proto; |
1da177e4 LT |
1569 | unsigned long flags; |
1570 | nodeid_t dest_node; | |
1571 | eth1394_tx_type tx_type; | |
1da177e4 LT |
1572 | unsigned int tx_len; |
1573 | unsigned int max_payload; | |
1574 | u16 dg_size; | |
1575 | u16 dgl; | |
1576 | struct packet_task *ptask; | |
1577 | struct eth1394_node_ref *node; | |
1578 | struct eth1394_node_info *node_info = NULL; | |
1579 | ||
53f374e7 | 1580 | ptask = kmem_cache_alloc(packet_task_cache, GFP_ATOMIC); |
fdc0092b | 1581 | if (ptask == NULL) |
1da177e4 | 1582 | goto fail; |
1da177e4 LT |
1583 | |
1584 | /* XXX Ignore this for now. Noticed that when MacOSX is the IRM, | |
1585 | * it does not set our validity bit. We need to compensate for | |
1586 | * that somewhere else, but not in eth1394. */ | |
1587 | #if 0 | |
fdc0092b | 1588 | if ((priv->host->csr.broadcast_channel & 0xc0000000) != 0xc0000000) |
1da177e4 | 1589 | goto fail; |
1da177e4 LT |
1590 | #endif |
1591 | ||
53f374e7 | 1592 | skb = skb_share_check(skb, GFP_ATOMIC); |
fdc0092b | 1593 | if (!skb) |
1da177e4 | 1594 | goto fail; |
1da177e4 | 1595 | |
18b46179 CU |
1596 | /* Get rid of the fake eth1394 header, but first make a copy. |
1597 | * We might need to rebuild the header on tx failure. */ | |
1598 | memcpy(&hdr_buf, skb->data, sizeof(hdr_buf)); | |
1da177e4 LT |
1599 | skb_pull(skb, ETH1394_HLEN); |
1600 | ||
18b46179 | 1601 | proto = hdr_buf.h_proto; |
1da177e4 LT |
1602 | dg_size = skb->len; |
1603 | ||
1604 | /* Set the transmission type for the packet. ARP packets and IP | |
1605 | * broadcast packets are sent via GASP. */ | |
18b46179 | 1606 | if (memcmp(hdr_buf.h_dest, dev->broadcast, ETH1394_ALEN) == 0 || |
7136b807 BC |
1607 | proto == htons(ETH_P_ARP) || |
1608 | (proto == htons(ETH_P_IP) && | |
eddc9ec5 | 1609 | IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) { |
1da177e4 LT |
1610 | tx_type = ETH1394_GASP; |
1611 | dest_node = LOCAL_BUS | ALL_NODES; | |
1612 | max_payload = priv->bc_maxpayload - ETHER1394_GASP_OVERHEAD; | |
efbeccf1 | 1613 | BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD); |
1da177e4 LT |
1614 | dgl = priv->bc_dgl; |
1615 | if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF]) | |
1616 | priv->bc_dgl++; | |
1617 | } else { | |
18b46179 | 1618 | __be64 guid = get_unaligned((u64 *)hdr_buf.h_dest); |
c20e3945 | 1619 | |
1da177e4 | 1620 | node = eth1394_find_node_guid(&priv->ip_node_list, |
c20e3945 | 1621 | be64_to_cpu(guid)); |
fdc0092b | 1622 | if (!node) |
1da177e4 | 1623 | goto fail; |
fdc0092b | 1624 | |
efbeccf1 SR |
1625 | node_info = |
1626 | (struct eth1394_node_info *)node->ud->device.driver_data; | |
fdc0092b | 1627 | if (node_info->fifo == CSR1212_INVALID_ADDR_SPACE) |
1da177e4 | 1628 | goto fail; |
1da177e4 LT |
1629 | |
1630 | dest_node = node->ud->ne->nodeid; | |
1631 | max_payload = node_info->maxpayload; | |
efbeccf1 | 1632 | BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD); |
1da177e4 LT |
1633 | |
1634 | dgl = node_info->dgl; | |
1635 | if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF]) | |
1636 | node_info->dgl++; | |
1637 | tx_type = ETH1394_WRREQ; | |
1638 | } | |
1639 | ||
1640 | /* If this is an ARP packet, convert it */ | |
7136b807 | 1641 | if (proto == htons(ETH_P_ARP)) |
efbeccf1 | 1642 | ether1394_arp_to_1394arp(skb, dev); |
1da177e4 LT |
1643 | |
1644 | ptask->hdr.words.word1 = 0; | |
1645 | ptask->hdr.words.word2 = 0; | |
1646 | ptask->hdr.words.word3 = 0; | |
1647 | ptask->hdr.words.word4 = 0; | |
1648 | ptask->skb = skb; | |
1649 | ptask->priv = priv; | |
1650 | ptask->tx_type = tx_type; | |
1651 | ||
1652 | if (tx_type != ETH1394_GASP) { | |
1653 | u64 addr; | |
1654 | ||
1655 | spin_lock_irqsave(&priv->lock, flags); | |
1656 | addr = node_info->fifo; | |
1657 | spin_unlock_irqrestore(&priv->lock, flags); | |
1658 | ||
1659 | ptask->addr = addr; | |
1660 | ptask->dest_node = dest_node; | |
1661 | } | |
1662 | ||
1663 | ptask->tx_type = tx_type; | |
1664 | ptask->max_payload = max_payload; | |
efbeccf1 SR |
1665 | ptask->outstanding_pkts = ether1394_encapsulate_prep(max_payload, |
1666 | proto, &ptask->hdr, dg_size, dgl); | |
1da177e4 LT |
1667 | |
1668 | /* Add the encapsulation header to the fragment */ | |
1669 | tx_len = ether1394_encapsulate(skb, max_payload, &ptask->hdr); | |
1670 | dev->trans_start = jiffies; | |
7a97bc03 SR |
1671 | if (ether1394_send_packet(ptask, tx_len)) { |
1672 | if (dest_node == (LOCAL_BUS | ALL_NODES)) | |
1673 | goto fail; | |
1674 | ||
18b46179 CU |
1675 | /* At this point we want to restore the packet. When we return |
1676 | * here with NETDEV_TX_BUSY we will get another entrance in this | |
1677 | * routine with the same skb and we need it to look the same. | |
1678 | * So we pull 4 more bytes, then build the header again. */ | |
1679 | skb_pull(skb, 4); | |
1680 | ether1394_header(skb, dev, ntohs(hdr_buf.h_proto), | |
1681 | hdr_buf.h_dest, NULL, 0); | |
1682 | ||
7a97bc03 SR |
1683 | /* Most failures of ether1394_send_packet are recoverable. */ |
1684 | netif_stop_queue(dev); | |
1685 | priv->wake_node = dest_node; | |
1686 | schedule_work(&priv->wake); | |
1687 | kmem_cache_free(packet_task_cache, ptask); | |
1688 | return NETDEV_TX_BUSY; | |
1689 | } | |
1da177e4 | 1690 | |
fdc0092b | 1691 | return NETDEV_TX_OK; |
1da177e4 LT |
1692 | fail: |
1693 | if (ptask) | |
1694 | kmem_cache_free(packet_task_cache, ptask); | |
1695 | ||
1696 | if (skb != NULL) | |
1697 | dev_kfree_skb(skb); | |
1698 | ||
efbeccf1 | 1699 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
1700 | priv->stats.tx_dropped++; |
1701 | priv->stats.tx_errors++; | |
efbeccf1 | 1702 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1703 | |
fdc0092b SR |
1704 | /* |
1705 | * FIXME: According to a patch from 2003-02-26, "returning non-zero | |
1706 | * causes serious problems" here, allegedly. Before that patch, | |
1707 | * -ERRNO was returned which is not appropriate under Linux 2.6. | |
1708 | * Perhaps more needs to be done? Stop the queue in serious | |
1709 | * conditions and restart it elsewhere? | |
1710 | */ | |
1711 | /* return NETDEV_TX_BUSY; */ | |
1712 | return NETDEV_TX_OK; | |
1da177e4 LT |
1713 | } |
1714 | ||
efbeccf1 SR |
1715 | static void ether1394_get_drvinfo(struct net_device *dev, |
1716 | struct ethtool_drvinfo *info) | |
1da177e4 | 1717 | { |
efbeccf1 SR |
1718 | strcpy(info->driver, driver_name); |
1719 | strcpy(info->bus_info, "ieee1394"); /* FIXME provide more detail? */ | |
1da177e4 LT |
1720 | } |
1721 | ||
1722 | static struct ethtool_ops ethtool_ops = { | |
1723 | .get_drvinfo = ether1394_get_drvinfo | |
1724 | }; | |
1725 | ||
809e905c | 1726 | static int __init ether1394_init_module(void) |
1da177e4 | 1727 | { |
809e905c AM |
1728 | int err; |
1729 | ||
efbeccf1 SR |
1730 | packet_task_cache = kmem_cache_create("packet_task", |
1731 | sizeof(struct packet_task), | |
20c2df83 | 1732 | 0, 0, NULL); |
809e905c AM |
1733 | if (!packet_task_cache) |
1734 | return -ENOMEM; | |
1da177e4 | 1735 | |
1da177e4 | 1736 | hpsb_register_highlevel(ð1394_highlevel); |
809e905c AM |
1737 | err = hpsb_register_protocol(ð1394_proto_driver); |
1738 | if (err) { | |
1739 | hpsb_unregister_highlevel(ð1394_highlevel); | |
1740 | kmem_cache_destroy(packet_task_cache); | |
1741 | } | |
1742 | return err; | |
1da177e4 LT |
1743 | } |
1744 | ||
809e905c | 1745 | static void __exit ether1394_exit_module(void) |
1da177e4 LT |
1746 | { |
1747 | hpsb_unregister_protocol(ð1394_proto_driver); | |
1748 | hpsb_unregister_highlevel(ð1394_highlevel); | |
1749 | kmem_cache_destroy(packet_task_cache); | |
1750 | } | |
1751 | ||
1752 | module_init(ether1394_init_module); | |
1753 | module_exit(ether1394_exit_module); |