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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, | |
3b04ddde SH |
162 | unsigned short type, const void *daddr, |
163 | const void *saddr, unsigned len); | |
1da177e4 | 164 | static int ether1394_rebuild_header(struct sk_buff *skb); |
b95cce35 SH |
165 | static int ether1394_header_parse(const struct sk_buff *skb, |
166 | unsigned char *haddr); | |
3b04ddde SH |
167 | static int ether1394_header_cache(const struct neighbour *neigh, |
168 | struct hh_cache *hh); | |
1da177e4 | 169 | static void ether1394_header_cache_update(struct hh_cache *hh, |
3b04ddde SH |
170 | const struct net_device *dev, |
171 | const unsigned char *haddr); | |
1da177e4 LT |
172 | static int ether1394_tx(struct sk_buff *skb, struct net_device *dev); |
173 | static void ether1394_iso(struct hpsb_iso *iso); | |
174 | ||
175 | static struct ethtool_ops ethtool_ops; | |
176 | ||
177 | static int ether1394_write(struct hpsb_host *host, int srcid, int destid, | |
178 | quadlet_t *data, u64 addr, size_t len, u16 flags); | |
efbeccf1 SR |
179 | static void ether1394_add_host(struct hpsb_host *host); |
180 | static void ether1394_remove_host(struct hpsb_host *host); | |
181 | static void ether1394_host_reset(struct hpsb_host *host); | |
1da177e4 LT |
182 | |
183 | /* Function for incoming 1394 packets */ | |
b17a5509 | 184 | const static struct hpsb_address_ops addr_ops = { |
1da177e4 LT |
185 | .write = ether1394_write, |
186 | }; | |
187 | ||
188 | /* Ieee1394 highlevel driver functions */ | |
189 | static struct hpsb_highlevel eth1394_highlevel = { | |
190 | .name = driver_name, | |
191 | .add_host = ether1394_add_host, | |
192 | .remove_host = ether1394_remove_host, | |
193 | .host_reset = ether1394_host_reset, | |
194 | }; | |
195 | ||
5009d269 | 196 | static int ether1394_recv_init(struct eth1394_priv *priv) |
09d7a96f | 197 | { |
efbeccf1 SR |
198 | unsigned int iso_buf_size; |
199 | ||
200 | /* FIXME: rawiso limits us to PAGE_SIZE */ | |
201 | iso_buf_size = min((unsigned int)PAGE_SIZE, | |
202 | 2 * (1U << (priv->host->csr.max_rec + 1))); | |
09d7a96f JD |
203 | |
204 | priv->iso = hpsb_iso_recv_init(priv->host, | |
efbeccf1 | 205 | ETHER1394_GASP_BUFFERS * iso_buf_size, |
09d7a96f JD |
206 | ETHER1394_GASP_BUFFERS, |
207 | priv->broadcast_channel, | |
208 | HPSB_ISO_DMA_PACKET_PER_BUFFER, | |
209 | 1, ether1394_iso); | |
210 | if (priv->iso == NULL) { | |
5009d269 | 211 | ETH1394_PRINT_G(KERN_ERR, "Failed to allocate IR context\n"); |
09d7a96f JD |
212 | priv->bc_state = ETHER1394_BC_ERROR; |
213 | return -EAGAIN; | |
214 | } | |
215 | ||
216 | if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0) | |
217 | priv->bc_state = ETHER1394_BC_STOPPED; | |
218 | else | |
219 | priv->bc_state = ETHER1394_BC_RUNNING; | |
220 | return 0; | |
221 | } | |
222 | ||
1da177e4 | 223 | /* This is called after an "ifup" */ |
09d7a96f | 224 | static int ether1394_open(struct net_device *dev) |
1da177e4 LT |
225 | { |
226 | struct eth1394_priv *priv = netdev_priv(dev); | |
09d7a96f | 227 | int ret; |
1da177e4 | 228 | |
1da177e4 | 229 | if (priv->bc_state == ETHER1394_BC_ERROR) { |
5009d269 | 230 | ret = ether1394_recv_init(priv); |
09d7a96f JD |
231 | if (ret) |
232 | return ret; | |
1da177e4 | 233 | } |
efbeccf1 | 234 | netif_start_queue(dev); |
1da177e4 LT |
235 | return 0; |
236 | } | |
237 | ||
238 | /* This is called after an "ifdown" */ | |
efbeccf1 | 239 | static int ether1394_stop(struct net_device *dev) |
1da177e4 | 240 | { |
7a97bc03 SR |
241 | /* flush priv->wake */ |
242 | flush_scheduled_work(); | |
243 | ||
efbeccf1 | 244 | netif_stop_queue(dev); |
1da177e4 LT |
245 | return 0; |
246 | } | |
247 | ||
248 | /* Return statistics to the caller */ | |
efbeccf1 | 249 | static struct net_device_stats *ether1394_stats(struct net_device *dev) |
1da177e4 LT |
250 | { |
251 | return &(((struct eth1394_priv *)netdev_priv(dev))->stats); | |
252 | } | |
253 | ||
efbeccf1 SR |
254 | /* FIXME: What to do if we timeout? I think a host reset is probably in order, |
255 | * so that's what we do. Should we increment the stat counters too? */ | |
256 | static void ether1394_tx_timeout(struct net_device *dev) | |
1da177e4 | 257 | { |
efbeccf1 SR |
258 | struct hpsb_host *host = |
259 | ((struct eth1394_priv *)netdev_priv(dev))->host; | |
1da177e4 | 260 | |
246a5fda SR |
261 | ETH1394_PRINT(KERN_ERR, dev->name, "Timeout, resetting host\n"); |
262 | ether1394_host_reset(host); | |
1da177e4 LT |
263 | } |
264 | ||
17bab407 SR |
265 | static inline int ether1394_max_mtu(struct hpsb_host* host) |
266 | { | |
267 | return (1 << (host->csr.max_rec + 1)) | |
268 | - sizeof(union eth1394_hdr) - ETHER1394_GASP_OVERHEAD; | |
269 | } | |
270 | ||
1da177e4 LT |
271 | static int ether1394_change_mtu(struct net_device *dev, int new_mtu) |
272 | { | |
17bab407 | 273 | int max_mtu; |
1da177e4 | 274 | |
17bab407 | 275 | if (new_mtu < 68) |
1da177e4 | 276 | return -EINVAL; |
efbeccf1 | 277 | |
17bab407 SR |
278 | max_mtu = ether1394_max_mtu( |
279 | ((struct eth1394_priv *)netdev_priv(dev))->host); | |
280 | if (new_mtu > max_mtu) { | |
281 | ETH1394_PRINT(KERN_INFO, dev->name, | |
282 | "Local node constrains MTU to %d\n", max_mtu); | |
283 | return -ERANGE; | |
284 | } | |
285 | ||
1da177e4 LT |
286 | dev->mtu = new_mtu; |
287 | return 0; | |
288 | } | |
289 | ||
290 | static void purge_partial_datagram(struct list_head *old) | |
291 | { | |
efbeccf1 | 292 | struct partial_datagram *pd; |
1da177e4 | 293 | struct list_head *lh, *n; |
efbeccf1 SR |
294 | struct fragment_info *fi; |
295 | ||
296 | pd = list_entry(old, struct partial_datagram, list); | |
1da177e4 LT |
297 | |
298 | list_for_each_safe(lh, n, &pd->frag_info) { | |
efbeccf1 | 299 | fi = list_entry(lh, struct fragment_info, list); |
1da177e4 LT |
300 | list_del(lh); |
301 | kfree(fi); | |
302 | } | |
303 | list_del(old); | |
304 | kfree_skb(pd->skb); | |
305 | kfree(pd); | |
306 | } | |
307 | ||
308 | /****************************************** | |
309 | * 1394 bus activity functions | |
310 | ******************************************/ | |
311 | ||
312 | static struct eth1394_node_ref *eth1394_find_node(struct list_head *inl, | |
313 | struct unit_directory *ud) | |
314 | { | |
315 | struct eth1394_node_ref *node; | |
316 | ||
317 | list_for_each_entry(node, inl, list) | |
318 | if (node->ud == ud) | |
319 | return node; | |
320 | ||
321 | return NULL; | |
322 | } | |
323 | ||
324 | static struct eth1394_node_ref *eth1394_find_node_guid(struct list_head *inl, | |
325 | u64 guid) | |
326 | { | |
327 | struct eth1394_node_ref *node; | |
328 | ||
329 | list_for_each_entry(node, inl, list) | |
330 | if (node->ud->ne->guid == guid) | |
331 | return node; | |
332 | ||
333 | return NULL; | |
334 | } | |
335 | ||
336 | static struct eth1394_node_ref *eth1394_find_node_nodeid(struct list_head *inl, | |
337 | nodeid_t nodeid) | |
338 | { | |
339 | struct eth1394_node_ref *node; | |
efbeccf1 SR |
340 | |
341 | list_for_each_entry(node, inl, list) | |
1da177e4 LT |
342 | if (node->ud->ne->nodeid == nodeid) |
343 | return node; | |
1da177e4 LT |
344 | |
345 | return NULL; | |
346 | } | |
347 | ||
d06c1dda SR |
348 | static int eth1394_new_node(struct eth1394_host_info *hi, |
349 | struct unit_directory *ud) | |
1da177e4 | 350 | { |
1da177e4 LT |
351 | struct eth1394_priv *priv; |
352 | struct eth1394_node_ref *new_node; | |
353 | struct eth1394_node_info *node_info; | |
354 | ||
5e7abccd | 355 | new_node = kmalloc(sizeof(*new_node), GFP_KERNEL); |
1da177e4 LT |
356 | if (!new_node) |
357 | return -ENOMEM; | |
358 | ||
5e7abccd | 359 | node_info = kmalloc(sizeof(*node_info), GFP_KERNEL); |
1da177e4 LT |
360 | if (!node_info) { |
361 | kfree(new_node); | |
362 | return -ENOMEM; | |
363 | } | |
364 | ||
365 | spin_lock_init(&node_info->pdg.lock); | |
366 | INIT_LIST_HEAD(&node_info->pdg.list); | |
367 | node_info->pdg.sz = 0; | |
6737231e | 368 | node_info->fifo = CSR1212_INVALID_ADDR_SPACE; |
1da177e4 LT |
369 | |
370 | ud->device.driver_data = node_info; | |
371 | new_node->ud = ud; | |
372 | ||
373 | priv = netdev_priv(hi->dev); | |
374 | list_add_tail(&new_node->list, &priv->ip_node_list); | |
1da177e4 LT |
375 | return 0; |
376 | } | |
377 | ||
d06c1dda SR |
378 | static int eth1394_probe(struct device *dev) |
379 | { | |
380 | struct unit_directory *ud; | |
381 | struct eth1394_host_info *hi; | |
382 | ||
383 | ud = container_of(dev, struct unit_directory, device); | |
384 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
385 | if (!hi) | |
386 | return -ENOENT; | |
387 | ||
388 | return eth1394_new_node(hi, ud); | |
389 | } | |
390 | ||
1da177e4 LT |
391 | static int eth1394_remove(struct device *dev) |
392 | { | |
393 | struct unit_directory *ud; | |
394 | struct eth1394_host_info *hi; | |
395 | struct eth1394_priv *priv; | |
396 | struct eth1394_node_ref *old_node; | |
397 | struct eth1394_node_info *node_info; | |
398 | struct list_head *lh, *n; | |
399 | unsigned long flags; | |
400 | ||
401 | ud = container_of(dev, struct unit_directory, device); | |
402 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
403 | if (!hi) | |
404 | return -ENOENT; | |
405 | ||
406 | priv = netdev_priv(hi->dev); | |
407 | ||
408 | old_node = eth1394_find_node(&priv->ip_node_list, ud); | |
efbeccf1 SR |
409 | if (!old_node) |
410 | return 0; | |
1da177e4 | 411 | |
efbeccf1 SR |
412 | list_del(&old_node->list); |
413 | kfree(old_node); | |
1da177e4 | 414 | |
efbeccf1 | 415 | node_info = (struct eth1394_node_info*)ud->device.driver_data; |
1da177e4 | 416 | |
efbeccf1 SR |
417 | spin_lock_irqsave(&node_info->pdg.lock, flags); |
418 | /* The partial datagram list should be empty, but we'll just | |
419 | * make sure anyway... */ | |
420 | list_for_each_safe(lh, n, &node_info->pdg.list) | |
421 | purge_partial_datagram(lh); | |
422 | spin_unlock_irqrestore(&node_info->pdg.lock, flags); | |
1da177e4 | 423 | |
efbeccf1 SR |
424 | kfree(node_info); |
425 | ud->device.driver_data = NULL; | |
1da177e4 LT |
426 | return 0; |
427 | } | |
428 | ||
429 | static int eth1394_update(struct unit_directory *ud) | |
430 | { | |
431 | struct eth1394_host_info *hi; | |
432 | struct eth1394_priv *priv; | |
433 | struct eth1394_node_ref *node; | |
1da177e4 LT |
434 | |
435 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
436 | if (!hi) | |
437 | return -ENOENT; | |
438 | ||
439 | priv = netdev_priv(hi->dev); | |
1da177e4 | 440 | node = eth1394_find_node(&priv->ip_node_list, ud); |
efbeccf1 SR |
441 | if (node) |
442 | return 0; | |
1da177e4 | 443 | |
d06c1dda | 444 | return eth1394_new_node(hi, ud); |
1da177e4 LT |
445 | } |
446 | ||
1da177e4 LT |
447 | static struct ieee1394_device_id eth1394_id_table[] = { |
448 | { | |
449 | .match_flags = (IEEE1394_MATCH_SPECIFIER_ID | | |
450 | IEEE1394_MATCH_VERSION), | |
451 | .specifier_id = ETHER1394_GASP_SPECIFIER_ID, | |
452 | .version = ETHER1394_GASP_VERSION, | |
453 | }, | |
454 | {} | |
455 | }; | |
456 | ||
457 | MODULE_DEVICE_TABLE(ieee1394, eth1394_id_table); | |
458 | ||
459 | static struct hpsb_protocol_driver eth1394_proto_driver = { | |
efbeccf1 | 460 | .name = driver_name, |
1da177e4 LT |
461 | .id_table = eth1394_id_table, |
462 | .update = eth1394_update, | |
463 | .driver = { | |
1da177e4 LT |
464 | .probe = eth1394_probe, |
465 | .remove = eth1394_remove, | |
466 | }, | |
467 | }; | |
468 | ||
efbeccf1 | 469 | static void ether1394_reset_priv(struct net_device *dev, int set_mtu) |
1da177e4 LT |
470 | { |
471 | unsigned long flags; | |
472 | int i; | |
473 | struct eth1394_priv *priv = netdev_priv(dev); | |
474 | struct hpsb_host *host = priv->host; | |
efbeccf1 | 475 | u64 guid = get_unaligned((u64 *)&(host->csr.rom->bus_info_data[3])); |
1da177e4 LT |
476 | int max_speed = IEEE1394_SPEED_MAX; |
477 | ||
efbeccf1 | 478 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 479 | |
027611b8 | 480 | memset(priv->ud_list, 0, sizeof(priv->ud_list)); |
1da177e4 LT |
481 | priv->bc_maxpayload = 512; |
482 | ||
483 | /* Determine speed limit */ | |
21b2c564 SR |
484 | /* FIXME: This is broken for nodes with link speed < PHY speed, |
485 | * and it is suboptimal for S200B...S800B hardware. | |
486 | * The result of nodemgr's speed probe should be used somehow. */ | |
487 | for (i = 0; i < host->node_count; i++) { | |
488 | /* take care of S100B...S400B PHY ports */ | |
489 | if (host->speed[i] == SELFID_SPEED_UNKNOWN) { | |
490 | max_speed = IEEE1394_SPEED_100; | |
491 | break; | |
492 | } | |
647dcb5f BC |
493 | if (max_speed > host->speed[i]) |
494 | max_speed = host->speed[i]; | |
21b2c564 | 495 | } |
1da177e4 LT |
496 | priv->bc_sspd = max_speed; |
497 | ||
1da177e4 | 498 | if (set_mtu) { |
17bab407 SR |
499 | /* Use the RFC 2734 default 1500 octets or the maximum payload |
500 | * as initial MTU */ | |
501 | dev->mtu = min(1500, ether1394_max_mtu(host)); | |
1da177e4 LT |
502 | |
503 | /* Set our hardware address while we're at it */ | |
c20e3945 DM |
504 | memcpy(dev->dev_addr, &guid, sizeof(u64)); |
505 | memset(dev->broadcast, 0xff, sizeof(u64)); | |
1da177e4 LT |
506 | } |
507 | ||
efbeccf1 | 508 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
509 | } |
510 | ||
3b04ddde SH |
511 | static const struct header_ops ether1394_header_ops = { |
512 | .create = ether1394_header, | |
513 | .rebuild = ether1394_rebuild_header, | |
514 | .cache = ether1394_header_cache, | |
515 | .cache_update = ether1394_header_cache_update, | |
516 | .parse = ether1394_header_parse, | |
517 | }; | |
518 | ||
efbeccf1 | 519 | static void ether1394_init_dev(struct net_device *dev) |
1da177e4 | 520 | { |
1da177e4 LT |
521 | dev->open = ether1394_open; |
522 | dev->stop = ether1394_stop; | |
523 | dev->hard_start_xmit = ether1394_tx; | |
524 | dev->get_stats = ether1394_stats; | |
525 | dev->tx_timeout = ether1394_tx_timeout; | |
526 | dev->change_mtu = ether1394_change_mtu; | |
527 | ||
3b04ddde | 528 | dev->header_ops = ðer1394_header_ops; |
01590d20 | 529 | |
1da177e4 LT |
530 | SET_ETHTOOL_OPS(dev, ðtool_ops); |
531 | ||
1da177e4 LT |
532 | dev->watchdog_timeo = ETHER1394_TIMEOUT; |
533 | dev->flags = IFF_BROADCAST | IFF_MULTICAST; | |
534 | dev->features = NETIF_F_HIGHDMA; | |
535 | dev->addr_len = ETH1394_ALEN; | |
536 | dev->hard_header_len = ETH1394_HLEN; | |
537 | dev->type = ARPHRD_IEEE1394; | |
538 | ||
01590d20 SR |
539 | /* FIXME: This value was copied from ether_setup(). Is it too much? */ |
540 | dev->tx_queue_len = 1000; | |
1da177e4 LT |
541 | } |
542 | ||
7a97bc03 SR |
543 | /* |
544 | * Wake the queue up after commonly encountered transmit failure conditions are | |
545 | * hopefully over. Currently only tlabel exhaustion is accounted for. | |
546 | */ | |
547 | static void ether1394_wake_queue(struct work_struct *work) | |
548 | { | |
549 | struct eth1394_priv *priv; | |
550 | struct hpsb_packet *packet; | |
551 | ||
552 | priv = container_of(work, struct eth1394_priv, wake); | |
553 | packet = hpsb_alloc_packet(0); | |
554 | ||
555 | /* This is really bad, but unjam the queue anyway. */ | |
556 | if (!packet) | |
557 | goto out; | |
558 | ||
559 | packet->host = priv->host; | |
560 | packet->node_id = priv->wake_node; | |
561 | /* | |
562 | * A transaction label is all we really want. If we get one, it almost | |
563 | * always means we can get a lot more because the ieee1394 core recycled | |
564 | * a whole batch of tlabels, at last. | |
565 | */ | |
566 | if (hpsb_get_tlabel(packet) == 0) | |
567 | hpsb_free_tlabel(packet); | |
568 | ||
569 | hpsb_free_packet(packet); | |
570 | out: | |
571 | netif_wake_queue(priv->wake_dev); | |
572 | } | |
573 | ||
1da177e4 LT |
574 | /* |
575 | * This function is called every time a card is found. It is generally called | |
576 | * when the module is installed. This is where we add all of our ethernet | |
577 | * devices. One for each host. | |
578 | */ | |
efbeccf1 | 579 | static void ether1394_add_host(struct hpsb_host *host) |
1da177e4 LT |
580 | { |
581 | struct eth1394_host_info *hi = NULL; | |
582 | struct net_device *dev = NULL; | |
583 | struct eth1394_priv *priv; | |
1da177e4 LT |
584 | u64 fifo_addr; |
585 | ||
70093cfd SR |
586 | if (hpsb_config_rom_ip1394_add(host) != 0) { |
587 | ETH1394_PRINT_G(KERN_ERR, "Can't add IP-over-1394 ROM entry\n"); | |
1da177e4 | 588 | return; |
70093cfd | 589 | } |
1da177e4 | 590 | |
6737231e BC |
591 | fifo_addr = hpsb_allocate_and_register_addrspace( |
592 | ð1394_highlevel, host, &addr_ops, | |
593 | ETHER1394_REGION_ADDR_LEN, ETHER1394_REGION_ADDR_LEN, | |
594 | CSR1212_INVALID_ADDR_SPACE, CSR1212_INVALID_ADDR_SPACE); | |
157188cb SR |
595 | if (fifo_addr == CSR1212_INVALID_ADDR_SPACE) { |
596 | ETH1394_PRINT_G(KERN_ERR, "Cannot register CSR space\n"); | |
70093cfd | 597 | hpsb_config_rom_ip1394_remove(host); |
157188cb SR |
598 | return; |
599 | } | |
1da177e4 | 600 | |
01590d20 | 601 | dev = alloc_netdev(sizeof(*priv), "eth%d", ether1394_init_dev); |
1da177e4 | 602 | if (dev == NULL) { |
5009d269 | 603 | ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); |
1da177e4 | 604 | goto out; |
efbeccf1 | 605 | } |
1da177e4 | 606 | |
8e4dc400 | 607 | SET_NETDEV_DEV(dev, &host->device); |
1da177e4 LT |
608 | |
609 | priv = netdev_priv(dev); | |
1da177e4 | 610 | INIT_LIST_HEAD(&priv->ip_node_list); |
1da177e4 LT |
611 | spin_lock_init(&priv->lock); |
612 | priv->host = host; | |
613 | priv->local_fifo = fifo_addr; | |
7a97bc03 SR |
614 | INIT_WORK(&priv->wake, ether1394_wake_queue); |
615 | priv->wake_dev = dev; | |
1da177e4 LT |
616 | |
617 | hi = hpsb_create_hostinfo(ð1394_highlevel, host, sizeof(*hi)); | |
1da177e4 | 618 | if (hi == NULL) { |
5009d269 | 619 | ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); |
1da177e4 | 620 | goto out; |
efbeccf1 | 621 | } |
1da177e4 | 622 | |
01590d20 | 623 | ether1394_reset_priv(dev, 1); |
1da177e4 | 624 | |
5009d269 SR |
625 | if (register_netdev(dev)) { |
626 | ETH1394_PRINT_G(KERN_ERR, "Cannot register the driver\n"); | |
1da177e4 LT |
627 | goto out; |
628 | } | |
629 | ||
5009d269 SR |
630 | ETH1394_PRINT(KERN_INFO, dev->name, "IPv4 over IEEE 1394 (fw-host%d)\n", |
631 | host->id); | |
1da177e4 LT |
632 | |
633 | hi->host = host; | |
634 | hi->dev = dev; | |
635 | ||
636 | /* Ignore validity in hopes that it will be set in the future. It'll | |
637 | * be checked when the eth device is opened. */ | |
638 | priv->broadcast_channel = host->csr.broadcast_channel & 0x3f; | |
639 | ||
5009d269 | 640 | ether1394_recv_init(priv); |
1da177e4 | 641 | return; |
1da177e4 | 642 | out: |
157188cb | 643 | if (dev) |
1da177e4 LT |
644 | free_netdev(dev); |
645 | if (hi) | |
646 | hpsb_destroy_hostinfo(ð1394_highlevel, host); | |
157188cb | 647 | hpsb_unregister_addrspace(ð1394_highlevel, host, fifo_addr); |
70093cfd | 648 | hpsb_config_rom_ip1394_remove(host); |
1da177e4 LT |
649 | } |
650 | ||
651 | /* Remove a card from our list */ | |
efbeccf1 | 652 | static void ether1394_remove_host(struct hpsb_host *host) |
1da177e4 LT |
653 | { |
654 | struct eth1394_host_info *hi; | |
2cd556ae | 655 | struct eth1394_priv *priv; |
1da177e4 LT |
656 | |
657 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
2cd556ae SR |
658 | if (!hi) |
659 | return; | |
660 | priv = netdev_priv(hi->dev); | |
661 | hpsb_unregister_addrspace(ð1394_highlevel, host, priv->local_fifo); | |
70093cfd | 662 | hpsb_config_rom_ip1394_remove(host); |
2cd556ae SR |
663 | if (priv->iso) |
664 | hpsb_iso_shutdown(priv->iso); | |
665 | unregister_netdev(hi->dev); | |
666 | free_netdev(hi->dev); | |
1da177e4 LT |
667 | } |
668 | ||
efbeccf1 SR |
669 | /* A bus reset happened */ |
670 | static void ether1394_host_reset(struct hpsb_host *host) | |
1da177e4 LT |
671 | { |
672 | struct eth1394_host_info *hi; | |
673 | struct eth1394_priv *priv; | |
674 | struct net_device *dev; | |
675 | struct list_head *lh, *n; | |
676 | struct eth1394_node_ref *node; | |
677 | struct eth1394_node_info *node_info; | |
678 | unsigned long flags; | |
679 | ||
680 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
681 | ||
682 | /* This can happen for hosts that we don't use */ | |
2cd556ae | 683 | if (!hi) |
1da177e4 LT |
684 | return; |
685 | ||
686 | dev = hi->dev; | |
efbeccf1 | 687 | priv = netdev_priv(dev); |
1da177e4 | 688 | |
efbeccf1 SR |
689 | /* Reset our private host data, but not our MTU */ |
690 | netif_stop_queue(dev); | |
691 | ether1394_reset_priv(dev, 0); | |
1da177e4 LT |
692 | |
693 | list_for_each_entry(node, &priv->ip_node_list, list) { | |
efbeccf1 | 694 | node_info = node->ud->device.driver_data; |
1da177e4 LT |
695 | |
696 | spin_lock_irqsave(&node_info->pdg.lock, flags); | |
697 | ||
efbeccf1 | 698 | list_for_each_safe(lh, n, &node_info->pdg.list) |
1da177e4 | 699 | purge_partial_datagram(lh); |
1da177e4 LT |
700 | |
701 | INIT_LIST_HEAD(&(node_info->pdg.list)); | |
702 | node_info->pdg.sz = 0; | |
703 | ||
704 | spin_unlock_irqrestore(&node_info->pdg.lock, flags); | |
705 | } | |
706 | ||
efbeccf1 | 707 | netif_wake_queue(dev); |
1da177e4 LT |
708 | } |
709 | ||
710 | /****************************************** | |
711 | * HW Header net device functions | |
712 | ******************************************/ | |
713 | /* These functions have been adapted from net/ethernet/eth.c */ | |
714 | ||
1da177e4 LT |
715 | /* Create a fake MAC header for an arbitrary protocol layer. |
716 | * saddr=NULL means use device source address | |
717 | * daddr=NULL means leave destination address (eg unresolved arp). */ | |
718 | static int ether1394_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
719 | unsigned short type, const void *daddr, |
720 | const void *saddr, unsigned len) | |
1da177e4 | 721 | { |
efbeccf1 SR |
722 | struct eth1394hdr *eth = |
723 | (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN); | |
1da177e4 LT |
724 | |
725 | eth->h_proto = htons(type); | |
726 | ||
efbeccf1 | 727 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) { |
1da177e4 | 728 | memset(eth->h_dest, 0, dev->addr_len); |
efbeccf1 | 729 | return dev->hard_header_len; |
1da177e4 LT |
730 | } |
731 | ||
732 | if (daddr) { | |
efbeccf1 | 733 | memcpy(eth->h_dest, daddr, dev->addr_len); |
1da177e4 LT |
734 | return dev->hard_header_len; |
735 | } | |
736 | ||
737 | return -dev->hard_header_len; | |
1da177e4 LT |
738 | } |
739 | ||
1da177e4 LT |
740 | /* Rebuild the faked MAC header. This is called after an ARP |
741 | * (or in future other address resolution) has completed on this | |
742 | * sk_buff. We now let ARP fill in the other fields. | |
743 | * | |
744 | * This routine CANNOT use cached dst->neigh! | |
745 | * Really, it is used only when dst->neigh is wrong. | |
746 | */ | |
747 | static int ether1394_rebuild_header(struct sk_buff *skb) | |
748 | { | |
749 | struct eth1394hdr *eth = (struct eth1394hdr *)skb->data; | |
1da177e4 | 750 | |
599bba96 | 751 | if (eth->h_proto == htons(ETH_P_IP)) |
efbeccf1 | 752 | return arp_find((unsigned char *)ð->h_dest, skb); |
1da177e4 | 753 | |
599bba96 SR |
754 | ETH1394_PRINT(KERN_DEBUG, skb->dev->name, |
755 | "unable to resolve type %04x addresses\n", | |
756 | ntohs(eth->h_proto)); | |
1da177e4 LT |
757 | return 0; |
758 | } | |
759 | ||
b95cce35 SH |
760 | static int ether1394_header_parse(const struct sk_buff *skb, |
761 | unsigned char *haddr) | |
1da177e4 | 762 | { |
b95cce35 | 763 | memcpy(haddr, skb->dev->dev_addr, ETH1394_ALEN); |
1da177e4 LT |
764 | return ETH1394_ALEN; |
765 | } | |
766 | ||
3b04ddde SH |
767 | static int ether1394_header_cache(const struct neighbour *neigh, |
768 | struct hh_cache *hh) | |
1da177e4 LT |
769 | { |
770 | unsigned short type = hh->hh_type; | |
1da177e4 | 771 | struct net_device *dev = neigh->dev; |
efbeccf1 SR |
772 | struct eth1394hdr *eth = |
773 | (struct eth1394hdr *)((u8 *)hh->hh_data + 16 - ETH1394_HLEN); | |
1da177e4 | 774 | |
7136b807 | 775 | if (type == htons(ETH_P_802_3)) |
1da177e4 | 776 | return -1; |
1da177e4 LT |
777 | |
778 | eth->h_proto = type; | |
779 | memcpy(eth->h_dest, neigh->ha, dev->addr_len); | |
780 | ||
781 | hh->hh_len = ETH1394_HLEN; | |
782 | return 0; | |
783 | } | |
784 | ||
785 | /* Called by Address Resolution module to notify changes in address. */ | |
786 | static void ether1394_header_cache_update(struct hh_cache *hh, | |
3b04ddde SH |
787 | const struct net_device *dev, |
788 | const unsigned char * haddr) | |
1da177e4 | 789 | { |
efbeccf1 | 790 | memcpy((u8 *)hh->hh_data + 16 - ETH1394_HLEN, haddr, dev->addr_len); |
1da177e4 LT |
791 | } |
792 | ||
1da177e4 LT |
793 | /****************************************** |
794 | * Datagram reception code | |
795 | ******************************************/ | |
796 | ||
797 | /* Copied from net/ethernet/eth.c */ | |
e00f04a7 | 798 | static u16 ether1394_type_trans(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
799 | { |
800 | struct eth1394hdr *eth; | |
801 | unsigned char *rawp; | |
802 | ||
459a98ed | 803 | skb_reset_mac_header(skb); |
efbeccf1 | 804 | skb_pull(skb, ETH1394_HLEN); |
1da177e4 LT |
805 | eth = eth1394_hdr(skb); |
806 | ||
807 | if (*eth->h_dest & 1) { | |
efbeccf1 | 808 | if (memcmp(eth->h_dest, dev->broadcast, dev->addr_len) == 0) |
1da177e4 LT |
809 | skb->pkt_type = PACKET_BROADCAST; |
810 | #if 0 | |
811 | else | |
812 | skb->pkt_type = PACKET_MULTICAST; | |
813 | #endif | |
814 | } else { | |
815 | if (memcmp(eth->h_dest, dev->dev_addr, dev->addr_len)) | |
816 | skb->pkt_type = PACKET_OTHERHOST; | |
efbeccf1 | 817 | } |
1da177e4 | 818 | |
efbeccf1 | 819 | if (ntohs(eth->h_proto) >= 1536) |
1da177e4 LT |
820 | return eth->h_proto; |
821 | ||
822 | rawp = skb->data; | |
823 | ||
efbeccf1 SR |
824 | if (*(unsigned short *)rawp == 0xFFFF) |
825 | return htons(ETH_P_802_3); | |
1da177e4 | 826 | |
efbeccf1 | 827 | return htons(ETH_P_802_2); |
1da177e4 LT |
828 | } |
829 | ||
830 | /* Parse an encapsulated IP1394 header into an ethernet frame packet. | |
831 | * We also perform ARP translation here, if need be. */ | |
e00f04a7 SR |
832 | static u16 ether1394_parse_encap(struct sk_buff *skb, struct net_device *dev, |
833 | nodeid_t srcid, nodeid_t destid, | |
834 | u16 ether_type) | |
1da177e4 LT |
835 | { |
836 | struct eth1394_priv *priv = netdev_priv(dev); | |
837 | u64 dest_hw; | |
838 | unsigned short ret = 0; | |
839 | ||
efbeccf1 | 840 | /* Setup our hw addresses. We use these to build the ethernet header. */ |
1da177e4 LT |
841 | if (destid == (LOCAL_BUS | ALL_NODES)) |
842 | dest_hw = ~0ULL; /* broadcast */ | |
843 | else | |
efbeccf1 | 844 | dest_hw = cpu_to_be64((u64)priv->host->csr.guid_hi << 32 | |
1da177e4 LT |
845 | priv->host->csr.guid_lo); |
846 | ||
847 | /* If this is an ARP packet, convert it. First, we want to make | |
848 | * use of some of the fields, since they tell us a little bit | |
849 | * about the sending machine. */ | |
7136b807 | 850 | if (ether_type == htons(ETH_P_ARP)) { |
efbeccf1 | 851 | struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data; |
1da177e4 LT |
852 | struct arphdr *arp = (struct arphdr *)skb->data; |
853 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
854 | u64 fifo_addr = (u64)ntohs(arp1394->fifo_hi) << 32 | | |
efbeccf1 | 855 | ntohl(arp1394->fifo_lo); |
1da177e4 LT |
856 | u8 max_rec = min(priv->host->csr.max_rec, |
857 | (u8)(arp1394->max_rec)); | |
858 | int sspd = arp1394->sspd; | |
859 | u16 maxpayload; | |
860 | struct eth1394_node_ref *node; | |
861 | struct eth1394_node_info *node_info; | |
c20e3945 | 862 | __be64 guid; |
1da177e4 LT |
863 | |
864 | /* Sanity check. MacOSX seems to be sending us 131 in this | |
865 | * field (atleast on my Panther G5). Not sure why. */ | |
866 | if (sspd > 5 || sspd < 0) | |
867 | sspd = 0; | |
868 | ||
efbeccf1 SR |
869 | maxpayload = min(eth1394_speedto_maxpayload[sspd], |
870 | (u16)(1 << (max_rec + 1))); | |
1da177e4 | 871 | |
c20e3945 | 872 | guid = get_unaligned(&arp1394->s_uniq_id); |
1da177e4 | 873 | node = eth1394_find_node_guid(&priv->ip_node_list, |
c20e3945 | 874 | be64_to_cpu(guid)); |
efbeccf1 | 875 | if (!node) |
1da177e4 | 876 | return 0; |
1da177e4 | 877 | |
efbeccf1 SR |
878 | node_info = |
879 | (struct eth1394_node_info *)node->ud->device.driver_data; | |
1da177e4 LT |
880 | |
881 | /* Update our speed/payload/fifo_offset table */ | |
882 | node_info->maxpayload = maxpayload; | |
883 | node_info->sspd = sspd; | |
884 | node_info->fifo = fifo_addr; | |
885 | ||
886 | /* Now that we're done with the 1394 specific stuff, we'll | |
887 | * need to alter some of the data. Believe it or not, all | |
888 | * that needs to be done is sender_IP_address needs to be | |
889 | * moved, the destination hardware address get stuffed | |
890 | * in and the hardware address length set to 8. | |
891 | * | |
892 | * IMPORTANT: The code below overwrites 1394 specific data | |
893 | * needed above so keep the munging of the data for the | |
894 | * higher level IP stack last. */ | |
895 | ||
896 | arp->ar_hln = 8; | |
897 | arp_ptr += arp->ar_hln; /* skip over sender unique id */ | |
efbeccf1 | 898 | *(u32 *)arp_ptr = arp1394->sip; /* move sender IP addr */ |
1da177e4 LT |
899 | arp_ptr += arp->ar_pln; /* skip over sender IP addr */ |
900 | ||
02f4213f | 901 | if (arp->ar_op == htons(ARPOP_REQUEST)) |
c20e3945 | 902 | memset(arp_ptr, 0, sizeof(u64)); |
1da177e4 | 903 | else |
c20e3945 | 904 | memcpy(arp_ptr, dev->dev_addr, sizeof(u64)); |
1da177e4 LT |
905 | } |
906 | ||
907 | /* Now add the ethernet header. */ | |
3b04ddde SH |
908 | if (dev_hard_header(skb, dev, ntohs(ether_type), &dest_hw, NULL, |
909 | skb->len) >= 0) | |
1da177e4 LT |
910 | ret = ether1394_type_trans(skb, dev); |
911 | ||
912 | return ret; | |
913 | } | |
914 | ||
e00f04a7 | 915 | static int fragment_overlap(struct list_head *frag_list, int offset, int len) |
1da177e4 LT |
916 | { |
917 | struct fragment_info *fi; | |
2e2173df | 918 | int end = offset + len; |
1da177e4 | 919 | |
2e2173df SR |
920 | list_for_each_entry(fi, frag_list, list) |
921 | if (offset < fi->offset + fi->len && end > fi->offset) | |
1da177e4 | 922 | return 1; |
2e2173df | 923 | |
1da177e4 LT |
924 | return 0; |
925 | } | |
926 | ||
e00f04a7 | 927 | static struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl) |
1da177e4 LT |
928 | { |
929 | struct partial_datagram *pd; | |
930 | ||
efbeccf1 | 931 | list_for_each_entry(pd, pdgl, list) |
1da177e4 LT |
932 | if (pd->dgl == dgl) |
933 | return &pd->list; | |
efbeccf1 | 934 | |
1da177e4 LT |
935 | return NULL; |
936 | } | |
937 | ||
938 | /* Assumes that new fragment does not overlap any existing fragments */ | |
e00f04a7 | 939 | static int new_fragment(struct list_head *frag_info, int offset, int len) |
1da177e4 LT |
940 | { |
941 | struct list_head *lh; | |
942 | struct fragment_info *fi, *fi2, *new; | |
943 | ||
944 | list_for_each(lh, frag_info) { | |
945 | fi = list_entry(lh, struct fragment_info, list); | |
efbeccf1 | 946 | if (fi->offset + fi->len == offset) { |
1da177e4 LT |
947 | /* The new fragment can be tacked on to the end */ |
948 | fi->len += len; | |
949 | /* Did the new fragment plug a hole? */ | |
950 | fi2 = list_entry(lh->next, struct fragment_info, list); | |
efbeccf1 | 951 | if (fi->offset + fi->len == fi2->offset) { |
1da177e4 LT |
952 | /* glue fragments together */ |
953 | fi->len += fi2->len; | |
954 | list_del(lh->next); | |
955 | kfree(fi2); | |
956 | } | |
957 | return 0; | |
efbeccf1 | 958 | } else if (offset + len == fi->offset) { |
1da177e4 LT |
959 | /* The new fragment can be tacked on to the beginning */ |
960 | fi->offset = offset; | |
961 | fi->len += len; | |
962 | /* Did the new fragment plug a hole? */ | |
963 | fi2 = list_entry(lh->prev, struct fragment_info, list); | |
efbeccf1 | 964 | if (fi2->offset + fi2->len == fi->offset) { |
1da177e4 LT |
965 | /* glue fragments together */ |
966 | fi2->len += fi->len; | |
967 | list_del(lh); | |
968 | kfree(fi); | |
969 | } | |
970 | return 0; | |
efbeccf1 | 971 | } else if (offset > fi->offset + fi->len) { |
1da177e4 | 972 | break; |
efbeccf1 | 973 | } else if (offset + len < fi->offset) { |
1da177e4 LT |
974 | lh = lh->prev; |
975 | break; | |
976 | } | |
977 | } | |
978 | ||
8551158a | 979 | new = kmalloc(sizeof(*new), GFP_ATOMIC); |
1da177e4 LT |
980 | if (!new) |
981 | return -ENOMEM; | |
982 | ||
983 | new->offset = offset; | |
984 | new->len = len; | |
985 | ||
986 | list_add(&new->list, lh); | |
1da177e4 LT |
987 | return 0; |
988 | } | |
989 | ||
e00f04a7 SR |
990 | static int new_partial_datagram(struct net_device *dev, struct list_head *pdgl, |
991 | int dgl, int dg_size, char *frag_buf, | |
992 | int frag_off, int frag_len) | |
1da177e4 LT |
993 | { |
994 | struct partial_datagram *new; | |
995 | ||
8551158a | 996 | new = kmalloc(sizeof(*new), GFP_ATOMIC); |
1da177e4 LT |
997 | if (!new) |
998 | return -ENOMEM; | |
999 | ||
1000 | INIT_LIST_HEAD(&new->frag_info); | |
1001 | ||
1002 | if (new_fragment(&new->frag_info, frag_off, frag_len) < 0) { | |
1003 | kfree(new); | |
1004 | return -ENOMEM; | |
1005 | } | |
1006 | ||
1007 | new->dgl = dgl; | |
1008 | new->dg_size = dg_size; | |
1009 | ||
1010 | new->skb = dev_alloc_skb(dg_size + dev->hard_header_len + 15); | |
1011 | if (!new->skb) { | |
1012 | struct fragment_info *fi = list_entry(new->frag_info.next, | |
1013 | struct fragment_info, | |
1014 | list); | |
1015 | kfree(fi); | |
1016 | kfree(new); | |
1017 | return -ENOMEM; | |
1018 | } | |
1019 | ||
1020 | skb_reserve(new->skb, (dev->hard_header_len + 15) & ~15); | |
1021 | new->pbuf = skb_put(new->skb, dg_size); | |
1022 | memcpy(new->pbuf + frag_off, frag_buf, frag_len); | |
1023 | ||
1024 | list_add(&new->list, pdgl); | |
1da177e4 LT |
1025 | return 0; |
1026 | } | |
1027 | ||
e00f04a7 SR |
1028 | static int update_partial_datagram(struct list_head *pdgl, struct list_head *lh, |
1029 | char *frag_buf, int frag_off, int frag_len) | |
1da177e4 | 1030 | { |
efbeccf1 SR |
1031 | struct partial_datagram *pd = |
1032 | list_entry(lh, struct partial_datagram, list); | |
1da177e4 | 1033 | |
efbeccf1 | 1034 | if (new_fragment(&pd->frag_info, frag_off, frag_len) < 0) |
1da177e4 | 1035 | return -ENOMEM; |
1da177e4 LT |
1036 | |
1037 | memcpy(pd->pbuf + frag_off, frag_buf, frag_len); | |
1038 | ||
1039 | /* Move list entry to beginnig of list so that oldest partial | |
1040 | * datagrams percolate to the end of the list */ | |
179e0917 | 1041 | list_move(lh, pdgl); |
1da177e4 LT |
1042 | return 0; |
1043 | } | |
1044 | ||
e00f04a7 | 1045 | static int is_datagram_complete(struct list_head *lh, int dg_size) |
1da177e4 | 1046 | { |
e00f04a7 SR |
1047 | struct partial_datagram *pd; |
1048 | struct fragment_info *fi; | |
1049 | ||
1050 | pd = list_entry(lh, struct partial_datagram, list); | |
1051 | fi = list_entry(pd->frag_info.next, struct fragment_info, list); | |
1da177e4 LT |
1052 | |
1053 | return (fi->len == dg_size); | |
1054 | } | |
1055 | ||
1056 | /* Packet reception. We convert the IP1394 encapsulation header to an | |
1057 | * ethernet header, and fill it with some of our other fields. This is | |
1058 | * an incoming packet from the 1394 bus. */ | |
1059 | static int ether1394_data_handler(struct net_device *dev, int srcid, int destid, | |
1060 | char *buf, int len) | |
1061 | { | |
1062 | struct sk_buff *skb; | |
1063 | unsigned long flags; | |
1064 | struct eth1394_priv *priv = netdev_priv(dev); | |
1065 | union eth1394_hdr *hdr = (union eth1394_hdr *)buf; | |
1066 | u16 ether_type = 0; /* initialized to clear warning */ | |
1067 | int hdr_len; | |
1068 | struct unit_directory *ud = priv->ud_list[NODEID_TO_NODE(srcid)]; | |
1069 | struct eth1394_node_info *node_info; | |
1070 | ||
1071 | if (!ud) { | |
1072 | struct eth1394_node_ref *node; | |
1073 | node = eth1394_find_node_nodeid(&priv->ip_node_list, srcid); | |
09939871 | 1074 | if (unlikely(!node)) { |
1da177e4 LT |
1075 | HPSB_PRINT(KERN_ERR, "ether1394 rx: sender nodeid " |
1076 | "lookup failure: " NODE_BUS_FMT, | |
1077 | NODE_BUS_ARGS(priv->host, srcid)); | |
1078 | priv->stats.rx_dropped++; | |
1079 | return -1; | |
1080 | } | |
1081 | ud = node->ud; | |
1082 | ||
1083 | priv->ud_list[NODEID_TO_NODE(srcid)] = ud; | |
1084 | } | |
1085 | ||
efbeccf1 | 1086 | node_info = (struct eth1394_node_info *)ud->device.driver_data; |
1da177e4 LT |
1087 | |
1088 | /* First, did we receive a fragmented or unfragmented datagram? */ | |
1089 | hdr->words.word1 = ntohs(hdr->words.word1); | |
1090 | ||
1091 | hdr_len = hdr_type_len[hdr->common.lf]; | |
1092 | ||
1093 | if (hdr->common.lf == ETH1394_HDR_LF_UF) { | |
1094 | /* An unfragmented datagram has been received by the ieee1394 | |
1095 | * bus. Build an skbuff around it so we can pass it to the | |
1096 | * high level network layer. */ | |
1097 | ||
1098 | skb = dev_alloc_skb(len + dev->hard_header_len + 15); | |
09939871 | 1099 | if (unlikely(!skb)) { |
5009d269 | 1100 | ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); |
1da177e4 LT |
1101 | priv->stats.rx_dropped++; |
1102 | return -1; | |
1103 | } | |
1104 | skb_reserve(skb, (dev->hard_header_len + 15) & ~15); | |
efbeccf1 SR |
1105 | memcpy(skb_put(skb, len - hdr_len), buf + hdr_len, |
1106 | len - hdr_len); | |
1da177e4 LT |
1107 | ether_type = hdr->uf.ether_type; |
1108 | } else { | |
1109 | /* A datagram fragment has been received, now the fun begins. */ | |
1110 | ||
1111 | struct list_head *pdgl, *lh; | |
1112 | struct partial_datagram *pd; | |
1113 | int fg_off; | |
1114 | int fg_len = len - hdr_len; | |
1115 | int dg_size; | |
1116 | int dgl; | |
1117 | int retval; | |
1118 | struct pdg_list *pdg = &(node_info->pdg); | |
1119 | ||
1120 | hdr->words.word3 = ntohs(hdr->words.word3); | |
1121 | /* The 4th header word is reserved so no need to do ntohs() */ | |
1122 | ||
1123 | if (hdr->common.lf == ETH1394_HDR_LF_FF) { | |
1124 | ether_type = hdr->ff.ether_type; | |
1125 | dgl = hdr->ff.dgl; | |
1126 | dg_size = hdr->ff.dg_size + 1; | |
1127 | fg_off = 0; | |
1128 | } else { | |
1129 | hdr->words.word2 = ntohs(hdr->words.word2); | |
1130 | dgl = hdr->sf.dgl; | |
1131 | dg_size = hdr->sf.dg_size + 1; | |
1132 | fg_off = hdr->sf.fg_off; | |
1133 | } | |
1134 | spin_lock_irqsave(&pdg->lock, flags); | |
1135 | ||
1136 | pdgl = &(pdg->list); | |
1137 | lh = find_partial_datagram(pdgl, dgl); | |
1138 | ||
1139 | if (lh == NULL) { | |
1140 | while (pdg->sz >= max_partial_datagrams) { | |
1141 | /* remove the oldest */ | |
1142 | purge_partial_datagram(pdgl->prev); | |
1143 | pdg->sz--; | |
1144 | } | |
1145 | ||
1146 | retval = new_partial_datagram(dev, pdgl, dgl, dg_size, | |
1147 | buf + hdr_len, fg_off, | |
1148 | fg_len); | |
1149 | if (retval < 0) { | |
1150 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1151 | goto bad_proto; | |
1152 | } | |
1153 | pdg->sz++; | |
1154 | lh = find_partial_datagram(pdgl, dgl); | |
1155 | } else { | |
1da177e4 LT |
1156 | pd = list_entry(lh, struct partial_datagram, list); |
1157 | ||
1158 | if (fragment_overlap(&pd->frag_info, fg_off, fg_len)) { | |
1159 | /* Overlapping fragments, obliterate old | |
1160 | * datagram and start new one. */ | |
1161 | purge_partial_datagram(lh); | |
1162 | retval = new_partial_datagram(dev, pdgl, dgl, | |
1163 | dg_size, | |
1164 | buf + hdr_len, | |
1165 | fg_off, fg_len); | |
1166 | if (retval < 0) { | |
1167 | pdg->sz--; | |
1168 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1169 | goto bad_proto; | |
1170 | } | |
1171 | } else { | |
1172 | retval = update_partial_datagram(pdgl, lh, | |
1173 | buf + hdr_len, | |
1174 | fg_off, fg_len); | |
1175 | if (retval < 0) { | |
1176 | /* Couldn't save off fragment anyway | |
1177 | * so might as well obliterate the | |
1178 | * datagram now. */ | |
1179 | purge_partial_datagram(lh); | |
1180 | pdg->sz--; | |
1181 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1182 | goto bad_proto; | |
1183 | } | |
1184 | } /* fragment overlap */ | |
1185 | } /* new datagram or add to existing one */ | |
1186 | ||
1187 | pd = list_entry(lh, struct partial_datagram, list); | |
1188 | ||
efbeccf1 | 1189 | if (hdr->common.lf == ETH1394_HDR_LF_FF) |
1da177e4 | 1190 | pd->ether_type = ether_type; |
1da177e4 LT |
1191 | |
1192 | if (is_datagram_complete(lh, dg_size)) { | |
1193 | ether_type = pd->ether_type; | |
1194 | pdg->sz--; | |
1195 | skb = skb_get(pd->skb); | |
1196 | purge_partial_datagram(lh); | |
1197 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1198 | } else { | |
1199 | /* Datagram is not complete, we're done for the | |
1200 | * moment. */ | |
1201 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1202 | return 0; | |
1203 | } | |
1204 | } /* unframgented datagram or fragmented one */ | |
1205 | ||
1206 | /* Write metadata, and then pass to the receive level */ | |
1207 | skb->dev = dev; | |
1208 | skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */ | |
1209 | ||
1210 | /* Parse the encapsulation header. This actually does the job of | |
1211 | * converting to an ethernet frame header, aswell as arp | |
1212 | * conversion if needed. ARP conversion is easier in this | |
1213 | * direction, since we are using ethernet as our backend. */ | |
1214 | skb->protocol = ether1394_parse_encap(skb, dev, srcid, destid, | |
1215 | ether_type); | |
1216 | ||
1da177e4 | 1217 | spin_lock_irqsave(&priv->lock, flags); |
efbeccf1 | 1218 | |
1da177e4 LT |
1219 | if (!skb->protocol) { |
1220 | priv->stats.rx_errors++; | |
1221 | priv->stats.rx_dropped++; | |
1222 | dev_kfree_skb_any(skb); | |
661afcae | 1223 | } else if (netif_rx(skb) == NET_RX_DROP) { |
1da177e4 LT |
1224 | priv->stats.rx_errors++; |
1225 | priv->stats.rx_dropped++; | |
661afcae SR |
1226 | } else { |
1227 | priv->stats.rx_packets++; | |
1228 | priv->stats.rx_bytes += skb->len; | |
1da177e4 LT |
1229 | } |
1230 | ||
661afcae | 1231 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
1232 | |
1233 | bad_proto: | |
1234 | if (netif_queue_stopped(dev)) | |
1235 | netif_wake_queue(dev); | |
1da177e4 LT |
1236 | |
1237 | dev->last_rx = jiffies; | |
1238 | ||
1239 | return 0; | |
1240 | } | |
1241 | ||
1242 | static int ether1394_write(struct hpsb_host *host, int srcid, int destid, | |
1243 | quadlet_t *data, u64 addr, size_t len, u16 flags) | |
1244 | { | |
1245 | struct eth1394_host_info *hi; | |
1246 | ||
1247 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
09939871 | 1248 | if (unlikely(!hi)) { |
5009d269 SR |
1249 | ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n", |
1250 | host->id); | |
1da177e4 LT |
1251 | return RCODE_ADDRESS_ERROR; |
1252 | } | |
1253 | ||
1254 | if (ether1394_data_handler(hi->dev, srcid, destid, (char*)data, len)) | |
1255 | return RCODE_ADDRESS_ERROR; | |
1256 | else | |
1257 | return RCODE_COMPLETE; | |
1258 | } | |
1259 | ||
1260 | static void ether1394_iso(struct hpsb_iso *iso) | |
1261 | { | |
1262 | quadlet_t *data; | |
1263 | char *buf; | |
1264 | struct eth1394_host_info *hi; | |
1265 | struct net_device *dev; | |
1266 | struct eth1394_priv *priv; | |
1267 | unsigned int len; | |
1268 | u32 specifier_id; | |
1269 | u16 source_id; | |
1270 | int i; | |
1271 | int nready; | |
1272 | ||
1273 | hi = hpsb_get_hostinfo(ð1394_highlevel, iso->host); | |
09939871 | 1274 | if (unlikely(!hi)) { |
5009d269 SR |
1275 | ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n", |
1276 | iso->host->id); | |
1da177e4 LT |
1277 | return; |
1278 | } | |
1279 | ||
1280 | dev = hi->dev; | |
1281 | ||
1282 | nready = hpsb_iso_n_ready(iso); | |
1283 | for (i = 0; i < nready; i++) { | |
1284 | struct hpsb_iso_packet_info *info = | |
1285 | &iso->infos[(iso->first_packet + i) % iso->buf_packets]; | |
efbeccf1 | 1286 | data = (quadlet_t *)(iso->data_buf.kvirt + info->offset); |
1da177e4 LT |
1287 | |
1288 | /* skip over GASP header */ | |
1289 | buf = (char *)data + 8; | |
1290 | len = info->len - 8; | |
1291 | ||
efbeccf1 SR |
1292 | specifier_id = (be32_to_cpu(data[0]) & 0xffff) << 8 | |
1293 | (be32_to_cpu(data[1]) & 0xff000000) >> 24; | |
1da177e4 LT |
1294 | source_id = be32_to_cpu(data[0]) >> 16; |
1295 | ||
1296 | priv = netdev_priv(dev); | |
1297 | ||
efbeccf1 SR |
1298 | if (info->channel != (iso->host->csr.broadcast_channel & 0x3f) |
1299 | || specifier_id != ETHER1394_GASP_SPECIFIER_ID) { | |
1da177e4 LT |
1300 | /* This packet is not for us */ |
1301 | continue; | |
1302 | } | |
1303 | ether1394_data_handler(dev, source_id, LOCAL_BUS | ALL_NODES, | |
1304 | buf, len); | |
1305 | } | |
1306 | ||
1307 | hpsb_iso_recv_release_packets(iso, i); | |
1308 | ||
1309 | dev->last_rx = jiffies; | |
1310 | } | |
1311 | ||
1312 | /****************************************** | |
1313 | * Datagram transmission code | |
1314 | ******************************************/ | |
1315 | ||
1316 | /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire | |
1317 | * arphdr) is the same format as the ip1394 header, so they overlap. The rest | |
1318 | * needs to be munged a bit. The remainder of the arphdr is formatted based | |
1319 | * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to | |
1320 | * judge. | |
1321 | * | |
1322 | * Now that the EUI is used for the hardware address all we need to do to make | |
1323 | * this work for 1394 is to insert 2 quadlets that contain max_rec size, | |
1324 | * speed, and unicast FIFO address information between the sender_unique_id | |
1325 | * and the IP addresses. | |
1326 | */ | |
e00f04a7 SR |
1327 | static void ether1394_arp_to_1394arp(struct sk_buff *skb, |
1328 | struct net_device *dev) | |
1da177e4 LT |
1329 | { |
1330 | struct eth1394_priv *priv = netdev_priv(dev); | |
1da177e4 LT |
1331 | struct arphdr *arp = (struct arphdr *)skb->data; |
1332 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
1333 | struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data; | |
1334 | ||
1da177e4 LT |
1335 | arp1394->hw_addr_len = 16; |
1336 | arp1394->sip = *(u32*)(arp_ptr + ETH1394_ALEN); | |
1337 | arp1394->max_rec = priv->host->csr.max_rec; | |
1338 | arp1394->sspd = priv->host->csr.lnk_spd; | |
efbeccf1 SR |
1339 | arp1394->fifo_hi = htons(priv->local_fifo >> 32); |
1340 | arp1394->fifo_lo = htonl(priv->local_fifo & ~0x0); | |
1da177e4 LT |
1341 | } |
1342 | ||
1343 | /* We need to encapsulate the standard header with our own. We use the | |
1344 | * ethernet header's proto for our own. */ | |
e00f04a7 SR |
1345 | static unsigned int ether1394_encapsulate_prep(unsigned int max_payload, |
1346 | __be16 proto, | |
1347 | union eth1394_hdr *hdr, | |
1348 | u16 dg_size, u16 dgl) | |
1da177e4 | 1349 | { |
efbeccf1 SR |
1350 | unsigned int adj_max_payload = |
1351 | max_payload - hdr_type_len[ETH1394_HDR_LF_UF]; | |
1da177e4 LT |
1352 | |
1353 | /* Does it all fit in one packet? */ | |
1354 | if (dg_size <= adj_max_payload) { | |
1355 | hdr->uf.lf = ETH1394_HDR_LF_UF; | |
1356 | hdr->uf.ether_type = proto; | |
1357 | } else { | |
1358 | hdr->ff.lf = ETH1394_HDR_LF_FF; | |
1359 | hdr->ff.ether_type = proto; | |
1360 | hdr->ff.dg_size = dg_size - 1; | |
1361 | hdr->ff.dgl = dgl; | |
1362 | adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_FF]; | |
1363 | } | |
68e2aa79 | 1364 | return DIV_ROUND_UP(dg_size, adj_max_payload); |
1da177e4 LT |
1365 | } |
1366 | ||
e00f04a7 SR |
1367 | static unsigned int ether1394_encapsulate(struct sk_buff *skb, |
1368 | unsigned int max_payload, | |
1369 | union eth1394_hdr *hdr) | |
1da177e4 LT |
1370 | { |
1371 | union eth1394_hdr *bufhdr; | |
1372 | int ftype = hdr->common.lf; | |
1373 | int hdrsz = hdr_type_len[ftype]; | |
1374 | unsigned int adj_max_payload = max_payload - hdrsz; | |
1375 | ||
efbeccf1 | 1376 | switch (ftype) { |
1da177e4 LT |
1377 | case ETH1394_HDR_LF_UF: |
1378 | bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz); | |
1379 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1380 | bufhdr->words.word2 = hdr->words.word2; | |
1381 | break; | |
1382 | ||
1383 | case ETH1394_HDR_LF_FF: | |
1384 | bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz); | |
1385 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1386 | bufhdr->words.word2 = hdr->words.word2; | |
1387 | bufhdr->words.word3 = htons(hdr->words.word3); | |
1388 | bufhdr->words.word4 = 0; | |
1389 | ||
1390 | /* Set frag type here for future interior fragments */ | |
1391 | hdr->common.lf = ETH1394_HDR_LF_IF; | |
1392 | hdr->sf.fg_off = 0; | |
1393 | break; | |
1394 | ||
1395 | default: | |
1396 | hdr->sf.fg_off += adj_max_payload; | |
1397 | bufhdr = (union eth1394_hdr *)skb_pull(skb, adj_max_payload); | |
1398 | if (max_payload >= skb->len) | |
1399 | hdr->common.lf = ETH1394_HDR_LF_LF; | |
1400 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1401 | bufhdr->words.word2 = htons(hdr->words.word2); | |
1402 | bufhdr->words.word3 = htons(hdr->words.word3); | |
1403 | bufhdr->words.word4 = 0; | |
1404 | } | |
1da177e4 LT |
1405 | return min(max_payload, skb->len); |
1406 | } | |
1407 | ||
e00f04a7 | 1408 | static struct hpsb_packet *ether1394_alloc_common_packet(struct hpsb_host *host) |
1da177e4 LT |
1409 | { |
1410 | struct hpsb_packet *p; | |
1411 | ||
1412 | p = hpsb_alloc_packet(0); | |
1413 | if (p) { | |
1414 | p->host = host; | |
1415 | p->generation = get_hpsb_generation(host); | |
1416 | p->type = hpsb_async; | |
1417 | } | |
1418 | return p; | |
1419 | } | |
1420 | ||
e00f04a7 SR |
1421 | static int ether1394_prep_write_packet(struct hpsb_packet *p, |
1422 | struct hpsb_host *host, nodeid_t node, | |
efbeccf1 | 1423 | u64 addr, void *data, int tx_len) |
1da177e4 LT |
1424 | { |
1425 | p->node_id = node; | |
1da177e4 | 1426 | |
7a97bc03 SR |
1427 | if (hpsb_get_tlabel(p)) |
1428 | return -EAGAIN; | |
1da177e4 | 1429 | |
7a97bc03 | 1430 | p->tcode = TCODE_WRITEB; |
1da177e4 LT |
1431 | p->header_size = 16; |
1432 | p->expect_response = 1; | |
efbeccf1 SR |
1433 | p->header[0] = |
1434 | p->node_id << 16 | p->tlabel << 10 | 1 << 8 | TCODE_WRITEB << 4; | |
7a97bc03 SR |
1435 | p->header[1] = host->node_id << 16 | addr >> 32; |
1436 | p->header[2] = addr & 0xffffffff; | |
1da177e4 LT |
1437 | p->header[3] = tx_len << 16; |
1438 | p->data_size = (tx_len + 3) & ~3; | |
efbeccf1 | 1439 | p->data = data; |
1da177e4 LT |
1440 | |
1441 | return 0; | |
1442 | } | |
1443 | ||
e00f04a7 SR |
1444 | static void ether1394_prep_gasp_packet(struct hpsb_packet *p, |
1445 | struct eth1394_priv *priv, | |
1446 | struct sk_buff *skb, int length) | |
1da177e4 LT |
1447 | { |
1448 | p->header_size = 4; | |
1449 | p->tcode = TCODE_STREAM_DATA; | |
1450 | ||
efbeccf1 SR |
1451 | p->header[0] = length << 16 | 3 << 14 | priv->broadcast_channel << 8 | |
1452 | TCODE_STREAM_DATA << 4; | |
1da177e4 | 1453 | p->data_size = length; |
efbeccf1 SR |
1454 | p->data = (quadlet_t *)skb->data - 2; |
1455 | p->data[0] = cpu_to_be32(priv->host->node_id << 16 | | |
1da177e4 | 1456 | ETHER1394_GASP_SPECIFIER_ID_HI); |
efbeccf1 | 1457 | p->data[1] = cpu_to_be32(ETHER1394_GASP_SPECIFIER_ID_LO << 24 | |
7136b807 | 1458 | ETHER1394_GASP_VERSION); |
1da177e4 | 1459 | |
1da177e4 | 1460 | p->speed_code = priv->bc_sspd; |
21b2c564 SR |
1461 | |
1462 | /* prevent hpsb_send_packet() from overriding our speed code */ | |
1463 | p->node_id = LOCAL_BUS | ALL_NODES; | |
1da177e4 LT |
1464 | } |
1465 | ||
e00f04a7 | 1466 | static void ether1394_free_packet(struct hpsb_packet *packet) |
1da177e4 LT |
1467 | { |
1468 | if (packet->tcode != TCODE_STREAM_DATA) | |
1469 | hpsb_free_tlabel(packet); | |
1470 | hpsb_free_packet(packet); | |
1471 | } | |
1472 | ||
1473 | static void ether1394_complete_cb(void *__ptask); | |
1474 | ||
1475 | static int ether1394_send_packet(struct packet_task *ptask, unsigned int tx_len) | |
1476 | { | |
1477 | struct eth1394_priv *priv = ptask->priv; | |
1478 | struct hpsb_packet *packet = NULL; | |
1479 | ||
1480 | packet = ether1394_alloc_common_packet(priv->host); | |
1481 | if (!packet) | |
7a97bc03 | 1482 | return -ENOMEM; |
1da177e4 LT |
1483 | |
1484 | if (ptask->tx_type == ETH1394_GASP) { | |
efbeccf1 | 1485 | int length = tx_len + 2 * sizeof(quadlet_t); |
1da177e4 LT |
1486 | |
1487 | ether1394_prep_gasp_packet(packet, priv, ptask->skb, length); | |
1488 | } else if (ether1394_prep_write_packet(packet, priv->host, | |
1489 | ptask->dest_node, | |
1490 | ptask->addr, ptask->skb->data, | |
1491 | tx_len)) { | |
1492 | hpsb_free_packet(packet); | |
7a97bc03 | 1493 | return -EAGAIN; |
1da177e4 LT |
1494 | } |
1495 | ||
1496 | ptask->packet = packet; | |
1497 | hpsb_set_packet_complete_task(ptask->packet, ether1394_complete_cb, | |
1498 | ptask); | |
1499 | ||
1500 | if (hpsb_send_packet(packet) < 0) { | |
1501 | ether1394_free_packet(packet); | |
7a97bc03 | 1502 | return -EIO; |
1da177e4 LT |
1503 | } |
1504 | ||
1505 | return 0; | |
1506 | } | |
1507 | ||
1da177e4 | 1508 | /* Task function to be run when a datagram transmission is completed */ |
e00f04a7 | 1509 | static void ether1394_dg_complete(struct packet_task *ptask, int fail) |
1da177e4 LT |
1510 | { |
1511 | struct sk_buff *skb = ptask->skb; | |
efbeccf1 | 1512 | struct eth1394_priv *priv = netdev_priv(skb->dev); |
1da177e4 LT |
1513 | unsigned long flags; |
1514 | ||
1515 | /* Statistics */ | |
1516 | spin_lock_irqsave(&priv->lock, flags); | |
1517 | if (fail) { | |
1518 | priv->stats.tx_dropped++; | |
1519 | priv->stats.tx_errors++; | |
1520 | } else { | |
1521 | priv->stats.tx_bytes += skb->len; | |
1522 | priv->stats.tx_packets++; | |
1523 | } | |
1524 | spin_unlock_irqrestore(&priv->lock, flags); | |
1525 | ||
1526 | dev_kfree_skb_any(skb); | |
1527 | kmem_cache_free(packet_task_cache, ptask); | |
1528 | } | |
1529 | ||
1da177e4 LT |
1530 | /* Callback for when a packet has been sent and the status of that packet is |
1531 | * known */ | |
1532 | static void ether1394_complete_cb(void *__ptask) | |
1533 | { | |
1534 | struct packet_task *ptask = (struct packet_task *)__ptask; | |
1535 | struct hpsb_packet *packet = ptask->packet; | |
1536 | int fail = 0; | |
1537 | ||
1538 | if (packet->tcode != TCODE_STREAM_DATA) | |
1539 | fail = hpsb_packet_success(packet); | |
1540 | ||
1541 | ether1394_free_packet(packet); | |
1542 | ||
1543 | ptask->outstanding_pkts--; | |
1544 | if (ptask->outstanding_pkts > 0 && !fail) { | |
7a97bc03 | 1545 | int tx_len, err; |
1da177e4 LT |
1546 | |
1547 | /* Add the encapsulation header to the fragment */ | |
1548 | tx_len = ether1394_encapsulate(ptask->skb, ptask->max_payload, | |
1549 | &ptask->hdr); | |
7a97bc03 SR |
1550 | err = ether1394_send_packet(ptask, tx_len); |
1551 | if (err) { | |
1552 | if (err == -EAGAIN) | |
1553 | ETH1394_PRINT_G(KERN_ERR, "Out of tlabels\n"); | |
1554 | ||
1da177e4 | 1555 | ether1394_dg_complete(ptask, 1); |
7a97bc03 | 1556 | } |
1da177e4 LT |
1557 | } else { |
1558 | ether1394_dg_complete(ptask, fail); | |
1559 | } | |
1560 | } | |
1561 | ||
1da177e4 | 1562 | /* Transmit a packet (called by kernel) */ |
efbeccf1 | 1563 | static int ether1394_tx(struct sk_buff *skb, struct net_device *dev) |
1da177e4 | 1564 | { |
18b46179 | 1565 | struct eth1394hdr hdr_buf; |
1da177e4 | 1566 | struct eth1394_priv *priv = netdev_priv(dev); |
02f4213f | 1567 | __be16 proto; |
1da177e4 LT |
1568 | unsigned long flags; |
1569 | nodeid_t dest_node; | |
1570 | eth1394_tx_type tx_type; | |
1da177e4 LT |
1571 | unsigned int tx_len; |
1572 | unsigned int max_payload; | |
1573 | u16 dg_size; | |
1574 | u16 dgl; | |
1575 | struct packet_task *ptask; | |
1576 | struct eth1394_node_ref *node; | |
1577 | struct eth1394_node_info *node_info = NULL; | |
1578 | ||
53f374e7 | 1579 | ptask = kmem_cache_alloc(packet_task_cache, GFP_ATOMIC); |
fdc0092b | 1580 | if (ptask == NULL) |
1da177e4 | 1581 | goto fail; |
1da177e4 LT |
1582 | |
1583 | /* XXX Ignore this for now. Noticed that when MacOSX is the IRM, | |
1584 | * it does not set our validity bit. We need to compensate for | |
1585 | * that somewhere else, but not in eth1394. */ | |
1586 | #if 0 | |
fdc0092b | 1587 | if ((priv->host->csr.broadcast_channel & 0xc0000000) != 0xc0000000) |
1da177e4 | 1588 | goto fail; |
1da177e4 LT |
1589 | #endif |
1590 | ||
53f374e7 | 1591 | skb = skb_share_check(skb, GFP_ATOMIC); |
fdc0092b | 1592 | if (!skb) |
1da177e4 | 1593 | goto fail; |
1da177e4 | 1594 | |
18b46179 CU |
1595 | /* Get rid of the fake eth1394 header, but first make a copy. |
1596 | * We might need to rebuild the header on tx failure. */ | |
1597 | memcpy(&hdr_buf, skb->data, sizeof(hdr_buf)); | |
1da177e4 LT |
1598 | skb_pull(skb, ETH1394_HLEN); |
1599 | ||
18b46179 | 1600 | proto = hdr_buf.h_proto; |
1da177e4 LT |
1601 | dg_size = skb->len; |
1602 | ||
1603 | /* Set the transmission type for the packet. ARP packets and IP | |
1604 | * broadcast packets are sent via GASP. */ | |
18b46179 | 1605 | if (memcmp(hdr_buf.h_dest, dev->broadcast, ETH1394_ALEN) == 0 || |
7136b807 BC |
1606 | proto == htons(ETH_P_ARP) || |
1607 | (proto == htons(ETH_P_IP) && | |
eddc9ec5 | 1608 | IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) { |
1da177e4 LT |
1609 | tx_type = ETH1394_GASP; |
1610 | dest_node = LOCAL_BUS | ALL_NODES; | |
1611 | max_payload = priv->bc_maxpayload - ETHER1394_GASP_OVERHEAD; | |
efbeccf1 | 1612 | BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD); |
1da177e4 LT |
1613 | dgl = priv->bc_dgl; |
1614 | if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF]) | |
1615 | priv->bc_dgl++; | |
1616 | } else { | |
18b46179 | 1617 | __be64 guid = get_unaligned((u64 *)hdr_buf.h_dest); |
c20e3945 | 1618 | |
1da177e4 | 1619 | node = eth1394_find_node_guid(&priv->ip_node_list, |
c20e3945 | 1620 | be64_to_cpu(guid)); |
fdc0092b | 1621 | if (!node) |
1da177e4 | 1622 | goto fail; |
fdc0092b | 1623 | |
efbeccf1 SR |
1624 | node_info = |
1625 | (struct eth1394_node_info *)node->ud->device.driver_data; | |
fdc0092b | 1626 | if (node_info->fifo == CSR1212_INVALID_ADDR_SPACE) |
1da177e4 | 1627 | goto fail; |
1da177e4 LT |
1628 | |
1629 | dest_node = node->ud->ne->nodeid; | |
1630 | max_payload = node_info->maxpayload; | |
efbeccf1 | 1631 | BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD); |
1da177e4 LT |
1632 | |
1633 | dgl = node_info->dgl; | |
1634 | if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF]) | |
1635 | node_info->dgl++; | |
1636 | tx_type = ETH1394_WRREQ; | |
1637 | } | |
1638 | ||
1639 | /* If this is an ARP packet, convert it */ | |
7136b807 | 1640 | if (proto == htons(ETH_P_ARP)) |
efbeccf1 | 1641 | ether1394_arp_to_1394arp(skb, dev); |
1da177e4 LT |
1642 | |
1643 | ptask->hdr.words.word1 = 0; | |
1644 | ptask->hdr.words.word2 = 0; | |
1645 | ptask->hdr.words.word3 = 0; | |
1646 | ptask->hdr.words.word4 = 0; | |
1647 | ptask->skb = skb; | |
1648 | ptask->priv = priv; | |
1649 | ptask->tx_type = tx_type; | |
1650 | ||
1651 | if (tx_type != ETH1394_GASP) { | |
1652 | u64 addr; | |
1653 | ||
1654 | spin_lock_irqsave(&priv->lock, flags); | |
1655 | addr = node_info->fifo; | |
1656 | spin_unlock_irqrestore(&priv->lock, flags); | |
1657 | ||
1658 | ptask->addr = addr; | |
1659 | ptask->dest_node = dest_node; | |
1660 | } | |
1661 | ||
1662 | ptask->tx_type = tx_type; | |
1663 | ptask->max_payload = max_payload; | |
efbeccf1 SR |
1664 | ptask->outstanding_pkts = ether1394_encapsulate_prep(max_payload, |
1665 | proto, &ptask->hdr, dg_size, dgl); | |
1da177e4 LT |
1666 | |
1667 | /* Add the encapsulation header to the fragment */ | |
1668 | tx_len = ether1394_encapsulate(skb, max_payload, &ptask->hdr); | |
1669 | dev->trans_start = jiffies; | |
7a97bc03 SR |
1670 | if (ether1394_send_packet(ptask, tx_len)) { |
1671 | if (dest_node == (LOCAL_BUS | ALL_NODES)) | |
1672 | goto fail; | |
1673 | ||
18b46179 CU |
1674 | /* At this point we want to restore the packet. When we return |
1675 | * here with NETDEV_TX_BUSY we will get another entrance in this | |
1676 | * routine with the same skb and we need it to look the same. | |
1677 | * So we pull 4 more bytes, then build the header again. */ | |
1678 | skb_pull(skb, 4); | |
1679 | ether1394_header(skb, dev, ntohs(hdr_buf.h_proto), | |
1680 | hdr_buf.h_dest, NULL, 0); | |
1681 | ||
7a97bc03 SR |
1682 | /* Most failures of ether1394_send_packet are recoverable. */ |
1683 | netif_stop_queue(dev); | |
1684 | priv->wake_node = dest_node; | |
1685 | schedule_work(&priv->wake); | |
1686 | kmem_cache_free(packet_task_cache, ptask); | |
1687 | return NETDEV_TX_BUSY; | |
1688 | } | |
1da177e4 | 1689 | |
fdc0092b | 1690 | return NETDEV_TX_OK; |
1da177e4 LT |
1691 | fail: |
1692 | if (ptask) | |
1693 | kmem_cache_free(packet_task_cache, ptask); | |
1694 | ||
1695 | if (skb != NULL) | |
1696 | dev_kfree_skb(skb); | |
1697 | ||
efbeccf1 | 1698 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
1699 | priv->stats.tx_dropped++; |
1700 | priv->stats.tx_errors++; | |
efbeccf1 | 1701 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1702 | |
fdc0092b SR |
1703 | /* |
1704 | * FIXME: According to a patch from 2003-02-26, "returning non-zero | |
1705 | * causes serious problems" here, allegedly. Before that patch, | |
1706 | * -ERRNO was returned which is not appropriate under Linux 2.6. | |
1707 | * Perhaps more needs to be done? Stop the queue in serious | |
1708 | * conditions and restart it elsewhere? | |
1709 | */ | |
1710 | /* return NETDEV_TX_BUSY; */ | |
1711 | return NETDEV_TX_OK; | |
1da177e4 LT |
1712 | } |
1713 | ||
efbeccf1 SR |
1714 | static void ether1394_get_drvinfo(struct net_device *dev, |
1715 | struct ethtool_drvinfo *info) | |
1da177e4 | 1716 | { |
efbeccf1 SR |
1717 | strcpy(info->driver, driver_name); |
1718 | strcpy(info->bus_info, "ieee1394"); /* FIXME provide more detail? */ | |
1da177e4 LT |
1719 | } |
1720 | ||
1721 | static struct ethtool_ops ethtool_ops = { | |
1722 | .get_drvinfo = ether1394_get_drvinfo | |
1723 | }; | |
1724 | ||
809e905c | 1725 | static int __init ether1394_init_module(void) |
1da177e4 | 1726 | { |
809e905c AM |
1727 | int err; |
1728 | ||
efbeccf1 SR |
1729 | packet_task_cache = kmem_cache_create("packet_task", |
1730 | sizeof(struct packet_task), | |
20c2df83 | 1731 | 0, 0, NULL); |
809e905c AM |
1732 | if (!packet_task_cache) |
1733 | return -ENOMEM; | |
1da177e4 | 1734 | |
1da177e4 | 1735 | hpsb_register_highlevel(ð1394_highlevel); |
809e905c AM |
1736 | err = hpsb_register_protocol(ð1394_proto_driver); |
1737 | if (err) { | |
1738 | hpsb_unregister_highlevel(ð1394_highlevel); | |
1739 | kmem_cache_destroy(packet_task_cache); | |
1740 | } | |
1741 | return err; | |
1da177e4 LT |
1742 | } |
1743 | ||
809e905c | 1744 | static void __exit ether1394_exit_module(void) |
1da177e4 LT |
1745 | { |
1746 | hpsb_unregister_protocol(ð1394_proto_driver); | |
1747 | hpsb_unregister_highlevel(ð1394_highlevel); | |
1748 | kmem_cache_destroy(packet_task_cache); | |
1749 | } | |
1750 | ||
1751 | module_init(ether1394_init_module); | |
1752 | module_exit(ether1394_exit_module); |