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> | |
50 | ||
51 | #include <linux/netdevice.h> | |
52 | #include <linux/inetdevice.h> | |
53 | #include <linux/etherdevice.h> | |
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_mac_addr(struct net_device *dev, void *p); |
171 | ||
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 */ | |
184 | static struct hpsb_address_ops addr_ops = { | |
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 | { |
efbeccf1 | 241 | netif_stop_queue(dev); |
1da177e4 LT |
242 | return 0; |
243 | } | |
244 | ||
245 | /* Return statistics to the caller */ | |
efbeccf1 | 246 | static struct net_device_stats *ether1394_stats(struct net_device *dev) |
1da177e4 LT |
247 | { |
248 | return &(((struct eth1394_priv *)netdev_priv(dev))->stats); | |
249 | } | |
250 | ||
efbeccf1 SR |
251 | /* FIXME: What to do if we timeout? I think a host reset is probably in order, |
252 | * so that's what we do. Should we increment the stat counters too? */ | |
253 | static void ether1394_tx_timeout(struct net_device *dev) | |
1da177e4 | 254 | { |
efbeccf1 SR |
255 | struct hpsb_host *host = |
256 | ((struct eth1394_priv *)netdev_priv(dev))->host; | |
1da177e4 | 257 | |
246a5fda SR |
258 | ETH1394_PRINT(KERN_ERR, dev->name, "Timeout, resetting host\n"); |
259 | ether1394_host_reset(host); | |
1da177e4 LT |
260 | } |
261 | ||
17bab407 SR |
262 | static inline int ether1394_max_mtu(struct hpsb_host* host) |
263 | { | |
264 | return (1 << (host->csr.max_rec + 1)) | |
265 | - sizeof(union eth1394_hdr) - ETHER1394_GASP_OVERHEAD; | |
266 | } | |
267 | ||
1da177e4 LT |
268 | static int ether1394_change_mtu(struct net_device *dev, int new_mtu) |
269 | { | |
17bab407 | 270 | int max_mtu; |
1da177e4 | 271 | |
17bab407 | 272 | if (new_mtu < 68) |
1da177e4 | 273 | return -EINVAL; |
efbeccf1 | 274 | |
17bab407 SR |
275 | max_mtu = ether1394_max_mtu( |
276 | ((struct eth1394_priv *)netdev_priv(dev))->host); | |
277 | if (new_mtu > max_mtu) { | |
278 | ETH1394_PRINT(KERN_INFO, dev->name, | |
279 | "Local node constrains MTU to %d\n", max_mtu); | |
280 | return -ERANGE; | |
281 | } | |
282 | ||
1da177e4 LT |
283 | dev->mtu = new_mtu; |
284 | return 0; | |
285 | } | |
286 | ||
287 | static void purge_partial_datagram(struct list_head *old) | |
288 | { | |
efbeccf1 | 289 | struct partial_datagram *pd; |
1da177e4 | 290 | struct list_head *lh, *n; |
efbeccf1 SR |
291 | struct fragment_info *fi; |
292 | ||
293 | pd = list_entry(old, struct partial_datagram, list); | |
1da177e4 LT |
294 | |
295 | list_for_each_safe(lh, n, &pd->frag_info) { | |
efbeccf1 | 296 | fi = list_entry(lh, struct fragment_info, list); |
1da177e4 LT |
297 | list_del(lh); |
298 | kfree(fi); | |
299 | } | |
300 | list_del(old); | |
301 | kfree_skb(pd->skb); | |
302 | kfree(pd); | |
303 | } | |
304 | ||
305 | /****************************************** | |
306 | * 1394 bus activity functions | |
307 | ******************************************/ | |
308 | ||
309 | static struct eth1394_node_ref *eth1394_find_node(struct list_head *inl, | |
310 | struct unit_directory *ud) | |
311 | { | |
312 | struct eth1394_node_ref *node; | |
313 | ||
314 | list_for_each_entry(node, inl, list) | |
315 | if (node->ud == ud) | |
316 | return node; | |
317 | ||
318 | return NULL; | |
319 | } | |
320 | ||
321 | static struct eth1394_node_ref *eth1394_find_node_guid(struct list_head *inl, | |
322 | u64 guid) | |
323 | { | |
324 | struct eth1394_node_ref *node; | |
325 | ||
326 | list_for_each_entry(node, inl, list) | |
327 | if (node->ud->ne->guid == guid) | |
328 | return node; | |
329 | ||
330 | return NULL; | |
331 | } | |
332 | ||
333 | static struct eth1394_node_ref *eth1394_find_node_nodeid(struct list_head *inl, | |
334 | nodeid_t nodeid) | |
335 | { | |
336 | struct eth1394_node_ref *node; | |
efbeccf1 SR |
337 | |
338 | list_for_each_entry(node, inl, list) | |
1da177e4 LT |
339 | if (node->ud->ne->nodeid == nodeid) |
340 | return node; | |
1da177e4 LT |
341 | |
342 | return NULL; | |
343 | } | |
344 | ||
d06c1dda SR |
345 | static int eth1394_new_node(struct eth1394_host_info *hi, |
346 | struct unit_directory *ud) | |
1da177e4 | 347 | { |
1da177e4 LT |
348 | struct eth1394_priv *priv; |
349 | struct eth1394_node_ref *new_node; | |
350 | struct eth1394_node_info *node_info; | |
351 | ||
5e7abccd | 352 | new_node = kmalloc(sizeof(*new_node), GFP_KERNEL); |
1da177e4 LT |
353 | if (!new_node) |
354 | return -ENOMEM; | |
355 | ||
5e7abccd | 356 | node_info = kmalloc(sizeof(*node_info), GFP_KERNEL); |
1da177e4 LT |
357 | if (!node_info) { |
358 | kfree(new_node); | |
359 | return -ENOMEM; | |
360 | } | |
361 | ||
362 | spin_lock_init(&node_info->pdg.lock); | |
363 | INIT_LIST_HEAD(&node_info->pdg.list); | |
364 | node_info->pdg.sz = 0; | |
6737231e | 365 | node_info->fifo = CSR1212_INVALID_ADDR_SPACE; |
1da177e4 LT |
366 | |
367 | ud->device.driver_data = node_info; | |
368 | new_node->ud = ud; | |
369 | ||
370 | priv = netdev_priv(hi->dev); | |
371 | list_add_tail(&new_node->list, &priv->ip_node_list); | |
1da177e4 LT |
372 | return 0; |
373 | } | |
374 | ||
d06c1dda SR |
375 | static int eth1394_probe(struct device *dev) |
376 | { | |
377 | struct unit_directory *ud; | |
378 | struct eth1394_host_info *hi; | |
379 | ||
380 | ud = container_of(dev, struct unit_directory, device); | |
381 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
382 | if (!hi) | |
383 | return -ENOENT; | |
384 | ||
385 | return eth1394_new_node(hi, ud); | |
386 | } | |
387 | ||
1da177e4 LT |
388 | static int eth1394_remove(struct device *dev) |
389 | { | |
390 | struct unit_directory *ud; | |
391 | struct eth1394_host_info *hi; | |
392 | struct eth1394_priv *priv; | |
393 | struct eth1394_node_ref *old_node; | |
394 | struct eth1394_node_info *node_info; | |
395 | struct list_head *lh, *n; | |
396 | unsigned long flags; | |
397 | ||
398 | ud = container_of(dev, struct unit_directory, device); | |
399 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
400 | if (!hi) | |
401 | return -ENOENT; | |
402 | ||
403 | priv = netdev_priv(hi->dev); | |
404 | ||
405 | old_node = eth1394_find_node(&priv->ip_node_list, ud); | |
efbeccf1 SR |
406 | if (!old_node) |
407 | return 0; | |
1da177e4 | 408 | |
efbeccf1 SR |
409 | list_del(&old_node->list); |
410 | kfree(old_node); | |
1da177e4 | 411 | |
efbeccf1 | 412 | node_info = (struct eth1394_node_info*)ud->device.driver_data; |
1da177e4 | 413 | |
efbeccf1 SR |
414 | spin_lock_irqsave(&node_info->pdg.lock, flags); |
415 | /* The partial datagram list should be empty, but we'll just | |
416 | * make sure anyway... */ | |
417 | list_for_each_safe(lh, n, &node_info->pdg.list) | |
418 | purge_partial_datagram(lh); | |
419 | spin_unlock_irqrestore(&node_info->pdg.lock, flags); | |
1da177e4 | 420 | |
efbeccf1 SR |
421 | kfree(node_info); |
422 | ud->device.driver_data = NULL; | |
1da177e4 LT |
423 | return 0; |
424 | } | |
425 | ||
426 | static int eth1394_update(struct unit_directory *ud) | |
427 | { | |
428 | struct eth1394_host_info *hi; | |
429 | struct eth1394_priv *priv; | |
430 | struct eth1394_node_ref *node; | |
1da177e4 LT |
431 | |
432 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
433 | if (!hi) | |
434 | return -ENOENT; | |
435 | ||
436 | priv = netdev_priv(hi->dev); | |
1da177e4 | 437 | node = eth1394_find_node(&priv->ip_node_list, ud); |
efbeccf1 SR |
438 | if (node) |
439 | return 0; | |
1da177e4 | 440 | |
d06c1dda | 441 | return eth1394_new_node(hi, ud); |
1da177e4 LT |
442 | } |
443 | ||
1da177e4 LT |
444 | static struct ieee1394_device_id eth1394_id_table[] = { |
445 | { | |
446 | .match_flags = (IEEE1394_MATCH_SPECIFIER_ID | | |
447 | IEEE1394_MATCH_VERSION), | |
448 | .specifier_id = ETHER1394_GASP_SPECIFIER_ID, | |
449 | .version = ETHER1394_GASP_VERSION, | |
450 | }, | |
451 | {} | |
452 | }; | |
453 | ||
454 | MODULE_DEVICE_TABLE(ieee1394, eth1394_id_table); | |
455 | ||
456 | static struct hpsb_protocol_driver eth1394_proto_driver = { | |
efbeccf1 | 457 | .name = driver_name, |
1da177e4 LT |
458 | .id_table = eth1394_id_table, |
459 | .update = eth1394_update, | |
460 | .driver = { | |
1da177e4 LT |
461 | .probe = eth1394_probe, |
462 | .remove = eth1394_remove, | |
463 | }, | |
464 | }; | |
465 | ||
efbeccf1 | 466 | static void ether1394_reset_priv(struct net_device *dev, int set_mtu) |
1da177e4 LT |
467 | { |
468 | unsigned long flags; | |
469 | int i; | |
470 | struct eth1394_priv *priv = netdev_priv(dev); | |
471 | struct hpsb_host *host = priv->host; | |
efbeccf1 | 472 | u64 guid = get_unaligned((u64 *)&(host->csr.rom->bus_info_data[3])); |
1da177e4 LT |
473 | int max_speed = IEEE1394_SPEED_MAX; |
474 | ||
efbeccf1 | 475 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 476 | |
027611b8 | 477 | memset(priv->ud_list, 0, sizeof(priv->ud_list)); |
1da177e4 LT |
478 | priv->bc_maxpayload = 512; |
479 | ||
480 | /* Determine speed limit */ | |
481 | for (i = 0; i < host->node_count; i++) | |
647dcb5f BC |
482 | if (max_speed > host->speed[i]) |
483 | max_speed = host->speed[i]; | |
1da177e4 LT |
484 | priv->bc_sspd = max_speed; |
485 | ||
1da177e4 | 486 | if (set_mtu) { |
17bab407 SR |
487 | /* Use the RFC 2734 default 1500 octets or the maximum payload |
488 | * as initial MTU */ | |
489 | dev->mtu = min(1500, ether1394_max_mtu(host)); | |
1da177e4 LT |
490 | |
491 | /* Set our hardware address while we're at it */ | |
c20e3945 DM |
492 | memcpy(dev->dev_addr, &guid, sizeof(u64)); |
493 | memset(dev->broadcast, 0xff, sizeof(u64)); | |
1da177e4 LT |
494 | } |
495 | ||
efbeccf1 | 496 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
497 | } |
498 | ||
499 | /* This function is called right before register_netdev */ | |
efbeccf1 | 500 | static void ether1394_init_dev(struct net_device *dev) |
1da177e4 LT |
501 | { |
502 | /* Our functions */ | |
503 | dev->open = ether1394_open; | |
504 | dev->stop = ether1394_stop; | |
505 | dev->hard_start_xmit = ether1394_tx; | |
506 | dev->get_stats = ether1394_stats; | |
507 | dev->tx_timeout = ether1394_tx_timeout; | |
508 | dev->change_mtu = ether1394_change_mtu; | |
509 | ||
510 | dev->hard_header = ether1394_header; | |
511 | dev->rebuild_header = ether1394_rebuild_header; | |
512 | dev->hard_header_cache = ether1394_header_cache; | |
513 | dev->header_cache_update= ether1394_header_cache_update; | |
514 | dev->hard_header_parse = ether1394_header_parse; | |
515 | dev->set_mac_address = ether1394_mac_addr; | |
516 | SET_ETHTOOL_OPS(dev, ðtool_ops); | |
517 | ||
518 | /* Some constants */ | |
519 | dev->watchdog_timeo = ETHER1394_TIMEOUT; | |
520 | dev->flags = IFF_BROADCAST | IFF_MULTICAST; | |
521 | dev->features = NETIF_F_HIGHDMA; | |
522 | dev->addr_len = ETH1394_ALEN; | |
523 | dev->hard_header_len = ETH1394_HLEN; | |
524 | dev->type = ARPHRD_IEEE1394; | |
525 | ||
efbeccf1 | 526 | ether1394_reset_priv(dev, 1); |
1da177e4 LT |
527 | } |
528 | ||
529 | /* | |
530 | * This function is called every time a card is found. It is generally called | |
531 | * when the module is installed. This is where we add all of our ethernet | |
532 | * devices. One for each host. | |
533 | */ | |
efbeccf1 | 534 | static void ether1394_add_host(struct hpsb_host *host) |
1da177e4 LT |
535 | { |
536 | struct eth1394_host_info *hi = NULL; | |
537 | struct net_device *dev = NULL; | |
538 | struct eth1394_priv *priv; | |
1da177e4 LT |
539 | u64 fifo_addr; |
540 | ||
70093cfd SR |
541 | if (hpsb_config_rom_ip1394_add(host) != 0) { |
542 | ETH1394_PRINT_G(KERN_ERR, "Can't add IP-over-1394 ROM entry\n"); | |
1da177e4 | 543 | return; |
70093cfd | 544 | } |
1da177e4 | 545 | |
6737231e BC |
546 | fifo_addr = hpsb_allocate_and_register_addrspace( |
547 | ð1394_highlevel, host, &addr_ops, | |
548 | ETHER1394_REGION_ADDR_LEN, ETHER1394_REGION_ADDR_LEN, | |
549 | CSR1212_INVALID_ADDR_SPACE, CSR1212_INVALID_ADDR_SPACE); | |
157188cb SR |
550 | if (fifo_addr == CSR1212_INVALID_ADDR_SPACE) { |
551 | ETH1394_PRINT_G(KERN_ERR, "Cannot register CSR space\n"); | |
70093cfd | 552 | hpsb_config_rom_ip1394_remove(host); |
157188cb SR |
553 | return; |
554 | } | |
1da177e4 | 555 | |
1da177e4 LT |
556 | /* We should really have our own alloc_hpsbdev() function in |
557 | * net_init.c instead of calling the one for ethernet then hijacking | |
558 | * it for ourselves. That way we'd be a real networking device. */ | |
559 | dev = alloc_etherdev(sizeof (struct eth1394_priv)); | |
560 | ||
561 | if (dev == NULL) { | |
5009d269 | 562 | ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); |
1da177e4 | 563 | goto out; |
efbeccf1 | 564 | } |
1da177e4 LT |
565 | |
566 | SET_MODULE_OWNER(dev); | |
7a9eeb2f SR |
567 | #if 0 |
568 | /* FIXME - Is this the correct parent device anyway? */ | |
1da177e4 | 569 | SET_NETDEV_DEV(dev, &host->device); |
7a9eeb2f | 570 | #endif |
1da177e4 LT |
571 | |
572 | priv = netdev_priv(dev); | |
573 | ||
574 | INIT_LIST_HEAD(&priv->ip_node_list); | |
575 | ||
576 | spin_lock_init(&priv->lock); | |
577 | priv->host = host; | |
578 | priv->local_fifo = fifo_addr; | |
579 | ||
580 | hi = hpsb_create_hostinfo(ð1394_highlevel, host, sizeof(*hi)); | |
581 | ||
582 | if (hi == NULL) { | |
5009d269 | 583 | ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); |
1da177e4 | 584 | goto out; |
efbeccf1 | 585 | } |
1da177e4 LT |
586 | |
587 | ether1394_init_dev(dev); | |
588 | ||
5009d269 SR |
589 | if (register_netdev(dev)) { |
590 | ETH1394_PRINT_G(KERN_ERR, "Cannot register the driver\n"); | |
1da177e4 LT |
591 | goto out; |
592 | } | |
593 | ||
5009d269 SR |
594 | ETH1394_PRINT(KERN_INFO, dev->name, "IPv4 over IEEE 1394 (fw-host%d)\n", |
595 | host->id); | |
1da177e4 LT |
596 | |
597 | hi->host = host; | |
598 | hi->dev = dev; | |
599 | ||
600 | /* Ignore validity in hopes that it will be set in the future. It'll | |
601 | * be checked when the eth device is opened. */ | |
602 | priv->broadcast_channel = host->csr.broadcast_channel & 0x3f; | |
603 | ||
5009d269 | 604 | ether1394_recv_init(priv); |
1da177e4 | 605 | return; |
1da177e4 | 606 | out: |
157188cb | 607 | if (dev) |
1da177e4 LT |
608 | free_netdev(dev); |
609 | if (hi) | |
610 | hpsb_destroy_hostinfo(ð1394_highlevel, host); | |
157188cb | 611 | hpsb_unregister_addrspace(ð1394_highlevel, host, fifo_addr); |
70093cfd | 612 | hpsb_config_rom_ip1394_remove(host); |
1da177e4 LT |
613 | } |
614 | ||
615 | /* Remove a card from our list */ | |
efbeccf1 | 616 | static void ether1394_remove_host(struct hpsb_host *host) |
1da177e4 LT |
617 | { |
618 | struct eth1394_host_info *hi; | |
2cd556ae | 619 | struct eth1394_priv *priv; |
1da177e4 LT |
620 | |
621 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
2cd556ae SR |
622 | if (!hi) |
623 | return; | |
624 | priv = netdev_priv(hi->dev); | |
625 | hpsb_unregister_addrspace(ð1394_highlevel, host, priv->local_fifo); | |
70093cfd | 626 | hpsb_config_rom_ip1394_remove(host); |
2cd556ae SR |
627 | if (priv->iso) |
628 | hpsb_iso_shutdown(priv->iso); | |
629 | unregister_netdev(hi->dev); | |
630 | free_netdev(hi->dev); | |
1da177e4 LT |
631 | } |
632 | ||
efbeccf1 SR |
633 | /* A bus reset happened */ |
634 | static void ether1394_host_reset(struct hpsb_host *host) | |
1da177e4 LT |
635 | { |
636 | struct eth1394_host_info *hi; | |
637 | struct eth1394_priv *priv; | |
638 | struct net_device *dev; | |
639 | struct list_head *lh, *n; | |
640 | struct eth1394_node_ref *node; | |
641 | struct eth1394_node_info *node_info; | |
642 | unsigned long flags; | |
643 | ||
644 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
645 | ||
646 | /* This can happen for hosts that we don't use */ | |
2cd556ae | 647 | if (!hi) |
1da177e4 LT |
648 | return; |
649 | ||
650 | dev = hi->dev; | |
efbeccf1 | 651 | priv = netdev_priv(dev); |
1da177e4 | 652 | |
efbeccf1 SR |
653 | /* Reset our private host data, but not our MTU */ |
654 | netif_stop_queue(dev); | |
655 | ether1394_reset_priv(dev, 0); | |
1da177e4 LT |
656 | |
657 | list_for_each_entry(node, &priv->ip_node_list, list) { | |
efbeccf1 | 658 | node_info = node->ud->device.driver_data; |
1da177e4 LT |
659 | |
660 | spin_lock_irqsave(&node_info->pdg.lock, flags); | |
661 | ||
efbeccf1 | 662 | list_for_each_safe(lh, n, &node_info->pdg.list) |
1da177e4 | 663 | purge_partial_datagram(lh); |
1da177e4 LT |
664 | |
665 | INIT_LIST_HEAD(&(node_info->pdg.list)); | |
666 | node_info->pdg.sz = 0; | |
667 | ||
668 | spin_unlock_irqrestore(&node_info->pdg.lock, flags); | |
669 | } | |
670 | ||
efbeccf1 | 671 | netif_wake_queue(dev); |
1da177e4 LT |
672 | } |
673 | ||
674 | /****************************************** | |
675 | * HW Header net device functions | |
676 | ******************************************/ | |
677 | /* These functions have been adapted from net/ethernet/eth.c */ | |
678 | ||
1da177e4 LT |
679 | /* Create a fake MAC header for an arbitrary protocol layer. |
680 | * saddr=NULL means use device source address | |
681 | * daddr=NULL means leave destination address (eg unresolved arp). */ | |
682 | static int ether1394_header(struct sk_buff *skb, struct net_device *dev, | |
683 | unsigned short type, void *daddr, void *saddr, | |
684 | unsigned len) | |
685 | { | |
efbeccf1 SR |
686 | struct eth1394hdr *eth = |
687 | (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN); | |
1da177e4 LT |
688 | |
689 | eth->h_proto = htons(type); | |
690 | ||
efbeccf1 | 691 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) { |
1da177e4 | 692 | memset(eth->h_dest, 0, dev->addr_len); |
efbeccf1 | 693 | return dev->hard_header_len; |
1da177e4 LT |
694 | } |
695 | ||
696 | if (daddr) { | |
efbeccf1 | 697 | memcpy(eth->h_dest, daddr, dev->addr_len); |
1da177e4 LT |
698 | return dev->hard_header_len; |
699 | } | |
700 | ||
701 | return -dev->hard_header_len; | |
1da177e4 LT |
702 | } |
703 | ||
1da177e4 LT |
704 | /* Rebuild the faked MAC header. This is called after an ARP |
705 | * (or in future other address resolution) has completed on this | |
706 | * sk_buff. We now let ARP fill in the other fields. | |
707 | * | |
708 | * This routine CANNOT use cached dst->neigh! | |
709 | * Really, it is used only when dst->neigh is wrong. | |
710 | */ | |
711 | static int ether1394_rebuild_header(struct sk_buff *skb) | |
712 | { | |
713 | struct eth1394hdr *eth = (struct eth1394hdr *)skb->data; | |
714 | struct net_device *dev = skb->dev; | |
715 | ||
716 | switch (eth->h_proto) { | |
717 | ||
718 | #ifdef CONFIG_INET | |
719 | case __constant_htons(ETH_P_IP): | |
efbeccf1 | 720 | return arp_find((unsigned char *)ð->h_dest, skb); |
1da177e4 LT |
721 | #endif |
722 | default: | |
723 | ETH1394_PRINT(KERN_DEBUG, dev->name, | |
724 | "unable to resolve type %04x addresses.\n", | |
7136b807 | 725 | ntohs(eth->h_proto)); |
1da177e4 LT |
726 | break; |
727 | } | |
728 | ||
729 | return 0; | |
730 | } | |
731 | ||
732 | static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr) | |
733 | { | |
734 | struct net_device *dev = skb->dev; | |
efbeccf1 | 735 | |
1da177e4 LT |
736 | memcpy(haddr, dev->dev_addr, ETH1394_ALEN); |
737 | return ETH1394_ALEN; | |
738 | } | |
739 | ||
1da177e4 LT |
740 | static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh) |
741 | { | |
742 | unsigned short type = hh->hh_type; | |
1da177e4 | 743 | struct net_device *dev = neigh->dev; |
efbeccf1 SR |
744 | struct eth1394hdr *eth = |
745 | (struct eth1394hdr *)((u8 *)hh->hh_data + 16 - ETH1394_HLEN); | |
1da177e4 | 746 | |
7136b807 | 747 | if (type == htons(ETH_P_802_3)) |
1da177e4 | 748 | return -1; |
1da177e4 LT |
749 | |
750 | eth->h_proto = type; | |
751 | memcpy(eth->h_dest, neigh->ha, dev->addr_len); | |
752 | ||
753 | hh->hh_len = ETH1394_HLEN; | |
754 | return 0; | |
755 | } | |
756 | ||
757 | /* Called by Address Resolution module to notify changes in address. */ | |
758 | static void ether1394_header_cache_update(struct hh_cache *hh, | |
759 | struct net_device *dev, | |
760 | unsigned char * haddr) | |
761 | { | |
efbeccf1 | 762 | memcpy((u8 *)hh->hh_data + 16 - ETH1394_HLEN, haddr, dev->addr_len); |
1da177e4 LT |
763 | } |
764 | ||
765 | static int ether1394_mac_addr(struct net_device *dev, void *p) | |
766 | { | |
767 | if (netif_running(dev)) | |
768 | return -EBUSY; | |
769 | ||
770 | /* Not going to allow setting the MAC address, we really need to use | |
771 | * the real one supplied by the hardware */ | |
772 | return -EINVAL; | |
efbeccf1 | 773 | } |
1da177e4 LT |
774 | |
775 | /****************************************** | |
776 | * Datagram reception code | |
777 | ******************************************/ | |
778 | ||
779 | /* Copied from net/ethernet/eth.c */ | |
e00f04a7 | 780 | static u16 ether1394_type_trans(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
781 | { |
782 | struct eth1394hdr *eth; | |
783 | unsigned char *rawp; | |
784 | ||
459a98ed | 785 | skb_reset_mac_header(skb); |
efbeccf1 | 786 | skb_pull(skb, ETH1394_HLEN); |
1da177e4 LT |
787 | eth = eth1394_hdr(skb); |
788 | ||
789 | if (*eth->h_dest & 1) { | |
efbeccf1 | 790 | if (memcmp(eth->h_dest, dev->broadcast, dev->addr_len) == 0) |
1da177e4 LT |
791 | skb->pkt_type = PACKET_BROADCAST; |
792 | #if 0 | |
793 | else | |
794 | skb->pkt_type = PACKET_MULTICAST; | |
795 | #endif | |
796 | } else { | |
797 | if (memcmp(eth->h_dest, dev->dev_addr, dev->addr_len)) | |
798 | skb->pkt_type = PACKET_OTHERHOST; | |
efbeccf1 | 799 | } |
1da177e4 | 800 | |
efbeccf1 | 801 | if (ntohs(eth->h_proto) >= 1536) |
1da177e4 LT |
802 | return eth->h_proto; |
803 | ||
804 | rawp = skb->data; | |
805 | ||
efbeccf1 SR |
806 | if (*(unsigned short *)rawp == 0xFFFF) |
807 | return htons(ETH_P_802_3); | |
1da177e4 | 808 | |
efbeccf1 | 809 | return htons(ETH_P_802_2); |
1da177e4 LT |
810 | } |
811 | ||
812 | /* Parse an encapsulated IP1394 header into an ethernet frame packet. | |
813 | * We also perform ARP translation here, if need be. */ | |
e00f04a7 SR |
814 | static u16 ether1394_parse_encap(struct sk_buff *skb, struct net_device *dev, |
815 | nodeid_t srcid, nodeid_t destid, | |
816 | u16 ether_type) | |
1da177e4 LT |
817 | { |
818 | struct eth1394_priv *priv = netdev_priv(dev); | |
819 | u64 dest_hw; | |
820 | unsigned short ret = 0; | |
821 | ||
efbeccf1 | 822 | /* Setup our hw addresses. We use these to build the ethernet header. */ |
1da177e4 LT |
823 | if (destid == (LOCAL_BUS | ALL_NODES)) |
824 | dest_hw = ~0ULL; /* broadcast */ | |
825 | else | |
efbeccf1 | 826 | dest_hw = cpu_to_be64((u64)priv->host->csr.guid_hi << 32 | |
1da177e4 LT |
827 | priv->host->csr.guid_lo); |
828 | ||
829 | /* If this is an ARP packet, convert it. First, we want to make | |
830 | * use of some of the fields, since they tell us a little bit | |
831 | * about the sending machine. */ | |
7136b807 | 832 | if (ether_type == htons(ETH_P_ARP)) { |
efbeccf1 | 833 | struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data; |
1da177e4 LT |
834 | struct arphdr *arp = (struct arphdr *)skb->data; |
835 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
836 | u64 fifo_addr = (u64)ntohs(arp1394->fifo_hi) << 32 | | |
efbeccf1 | 837 | ntohl(arp1394->fifo_lo); |
1da177e4 LT |
838 | u8 max_rec = min(priv->host->csr.max_rec, |
839 | (u8)(arp1394->max_rec)); | |
840 | int sspd = arp1394->sspd; | |
841 | u16 maxpayload; | |
842 | struct eth1394_node_ref *node; | |
843 | struct eth1394_node_info *node_info; | |
c20e3945 | 844 | __be64 guid; |
1da177e4 LT |
845 | |
846 | /* Sanity check. MacOSX seems to be sending us 131 in this | |
847 | * field (atleast on my Panther G5). Not sure why. */ | |
848 | if (sspd > 5 || sspd < 0) | |
849 | sspd = 0; | |
850 | ||
efbeccf1 SR |
851 | maxpayload = min(eth1394_speedto_maxpayload[sspd], |
852 | (u16)(1 << (max_rec + 1))); | |
1da177e4 | 853 | |
c20e3945 | 854 | guid = get_unaligned(&arp1394->s_uniq_id); |
1da177e4 | 855 | node = eth1394_find_node_guid(&priv->ip_node_list, |
c20e3945 | 856 | be64_to_cpu(guid)); |
efbeccf1 | 857 | if (!node) |
1da177e4 | 858 | return 0; |
1da177e4 | 859 | |
efbeccf1 SR |
860 | node_info = |
861 | (struct eth1394_node_info *)node->ud->device.driver_data; | |
1da177e4 LT |
862 | |
863 | /* Update our speed/payload/fifo_offset table */ | |
864 | node_info->maxpayload = maxpayload; | |
865 | node_info->sspd = sspd; | |
866 | node_info->fifo = fifo_addr; | |
867 | ||
868 | /* Now that we're done with the 1394 specific stuff, we'll | |
869 | * need to alter some of the data. Believe it or not, all | |
870 | * that needs to be done is sender_IP_address needs to be | |
871 | * moved, the destination hardware address get stuffed | |
872 | * in and the hardware address length set to 8. | |
873 | * | |
874 | * IMPORTANT: The code below overwrites 1394 specific data | |
875 | * needed above so keep the munging of the data for the | |
876 | * higher level IP stack last. */ | |
877 | ||
878 | arp->ar_hln = 8; | |
879 | arp_ptr += arp->ar_hln; /* skip over sender unique id */ | |
efbeccf1 | 880 | *(u32 *)arp_ptr = arp1394->sip; /* move sender IP addr */ |
1da177e4 LT |
881 | arp_ptr += arp->ar_pln; /* skip over sender IP addr */ |
882 | ||
02f4213f | 883 | if (arp->ar_op == htons(ARPOP_REQUEST)) |
c20e3945 | 884 | memset(arp_ptr, 0, sizeof(u64)); |
1da177e4 | 885 | else |
c20e3945 | 886 | memcpy(arp_ptr, dev->dev_addr, sizeof(u64)); |
1da177e4 LT |
887 | } |
888 | ||
889 | /* Now add the ethernet header. */ | |
7136b807 BC |
890 | if (dev->hard_header(skb, dev, ntohs(ether_type), &dest_hw, NULL, |
891 | skb->len) >= 0) | |
1da177e4 LT |
892 | ret = ether1394_type_trans(skb, dev); |
893 | ||
894 | return ret; | |
895 | } | |
896 | ||
e00f04a7 | 897 | static int fragment_overlap(struct list_head *frag_list, int offset, int len) |
1da177e4 LT |
898 | { |
899 | struct fragment_info *fi; | |
900 | ||
901 | list_for_each_entry(fi, frag_list, list) { | |
902 | if ( ! ((offset > (fi->offset + fi->len - 1)) || | |
903 | ((offset + len - 1) < fi->offset))) | |
904 | return 1; | |
905 | } | |
906 | return 0; | |
907 | } | |
908 | ||
e00f04a7 | 909 | static struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl) |
1da177e4 LT |
910 | { |
911 | struct partial_datagram *pd; | |
912 | ||
efbeccf1 | 913 | list_for_each_entry(pd, pdgl, list) |
1da177e4 LT |
914 | if (pd->dgl == dgl) |
915 | return &pd->list; | |
efbeccf1 | 916 | |
1da177e4 LT |
917 | return NULL; |
918 | } | |
919 | ||
920 | /* Assumes that new fragment does not overlap any existing fragments */ | |
e00f04a7 | 921 | static int new_fragment(struct list_head *frag_info, int offset, int len) |
1da177e4 LT |
922 | { |
923 | struct list_head *lh; | |
924 | struct fragment_info *fi, *fi2, *new; | |
925 | ||
926 | list_for_each(lh, frag_info) { | |
927 | fi = list_entry(lh, struct fragment_info, list); | |
efbeccf1 | 928 | if (fi->offset + fi->len == offset) { |
1da177e4 LT |
929 | /* The new fragment can be tacked on to the end */ |
930 | fi->len += len; | |
931 | /* Did the new fragment plug a hole? */ | |
932 | fi2 = list_entry(lh->next, struct fragment_info, list); | |
efbeccf1 | 933 | if (fi->offset + fi->len == fi2->offset) { |
1da177e4 LT |
934 | /* glue fragments together */ |
935 | fi->len += fi2->len; | |
936 | list_del(lh->next); | |
937 | kfree(fi2); | |
938 | } | |
939 | return 0; | |
efbeccf1 | 940 | } else if (offset + len == fi->offset) { |
1da177e4 LT |
941 | /* The new fragment can be tacked on to the beginning */ |
942 | fi->offset = offset; | |
943 | fi->len += len; | |
944 | /* Did the new fragment plug a hole? */ | |
945 | fi2 = list_entry(lh->prev, struct fragment_info, list); | |
efbeccf1 | 946 | if (fi2->offset + fi2->len == fi->offset) { |
1da177e4 LT |
947 | /* glue fragments together */ |
948 | fi2->len += fi->len; | |
949 | list_del(lh); | |
950 | kfree(fi); | |
951 | } | |
952 | return 0; | |
efbeccf1 | 953 | } else if (offset > fi->offset + fi->len) { |
1da177e4 | 954 | break; |
efbeccf1 | 955 | } else if (offset + len < fi->offset) { |
1da177e4 LT |
956 | lh = lh->prev; |
957 | break; | |
958 | } | |
959 | } | |
960 | ||
8551158a | 961 | new = kmalloc(sizeof(*new), GFP_ATOMIC); |
1da177e4 LT |
962 | if (!new) |
963 | return -ENOMEM; | |
964 | ||
965 | new->offset = offset; | |
966 | new->len = len; | |
967 | ||
968 | list_add(&new->list, lh); | |
1da177e4 LT |
969 | return 0; |
970 | } | |
971 | ||
e00f04a7 SR |
972 | static int new_partial_datagram(struct net_device *dev, struct list_head *pdgl, |
973 | int dgl, int dg_size, char *frag_buf, | |
974 | int frag_off, int frag_len) | |
1da177e4 LT |
975 | { |
976 | struct partial_datagram *new; | |
977 | ||
8551158a | 978 | new = kmalloc(sizeof(*new), GFP_ATOMIC); |
1da177e4 LT |
979 | if (!new) |
980 | return -ENOMEM; | |
981 | ||
982 | INIT_LIST_HEAD(&new->frag_info); | |
983 | ||
984 | if (new_fragment(&new->frag_info, frag_off, frag_len) < 0) { | |
985 | kfree(new); | |
986 | return -ENOMEM; | |
987 | } | |
988 | ||
989 | new->dgl = dgl; | |
990 | new->dg_size = dg_size; | |
991 | ||
992 | new->skb = dev_alloc_skb(dg_size + dev->hard_header_len + 15); | |
993 | if (!new->skb) { | |
994 | struct fragment_info *fi = list_entry(new->frag_info.next, | |
995 | struct fragment_info, | |
996 | list); | |
997 | kfree(fi); | |
998 | kfree(new); | |
999 | return -ENOMEM; | |
1000 | } | |
1001 | ||
1002 | skb_reserve(new->skb, (dev->hard_header_len + 15) & ~15); | |
1003 | new->pbuf = skb_put(new->skb, dg_size); | |
1004 | memcpy(new->pbuf + frag_off, frag_buf, frag_len); | |
1005 | ||
1006 | list_add(&new->list, pdgl); | |
1da177e4 LT |
1007 | return 0; |
1008 | } | |
1009 | ||
e00f04a7 SR |
1010 | static int update_partial_datagram(struct list_head *pdgl, struct list_head *lh, |
1011 | char *frag_buf, int frag_off, int frag_len) | |
1da177e4 | 1012 | { |
efbeccf1 SR |
1013 | struct partial_datagram *pd = |
1014 | list_entry(lh, struct partial_datagram, list); | |
1da177e4 | 1015 | |
efbeccf1 | 1016 | if (new_fragment(&pd->frag_info, frag_off, frag_len) < 0) |
1da177e4 | 1017 | return -ENOMEM; |
1da177e4 LT |
1018 | |
1019 | memcpy(pd->pbuf + frag_off, frag_buf, frag_len); | |
1020 | ||
1021 | /* Move list entry to beginnig of list so that oldest partial | |
1022 | * datagrams percolate to the end of the list */ | |
179e0917 | 1023 | list_move(lh, pdgl); |
1da177e4 LT |
1024 | return 0; |
1025 | } | |
1026 | ||
e00f04a7 | 1027 | static int is_datagram_complete(struct list_head *lh, int dg_size) |
1da177e4 | 1028 | { |
e00f04a7 SR |
1029 | struct partial_datagram *pd; |
1030 | struct fragment_info *fi; | |
1031 | ||
1032 | pd = list_entry(lh, struct partial_datagram, list); | |
1033 | fi = list_entry(pd->frag_info.next, struct fragment_info, list); | |
1da177e4 LT |
1034 | |
1035 | return (fi->len == dg_size); | |
1036 | } | |
1037 | ||
1038 | /* Packet reception. We convert the IP1394 encapsulation header to an | |
1039 | * ethernet header, and fill it with some of our other fields. This is | |
1040 | * an incoming packet from the 1394 bus. */ | |
1041 | static int ether1394_data_handler(struct net_device *dev, int srcid, int destid, | |
1042 | char *buf, int len) | |
1043 | { | |
1044 | struct sk_buff *skb; | |
1045 | unsigned long flags; | |
1046 | struct eth1394_priv *priv = netdev_priv(dev); | |
1047 | union eth1394_hdr *hdr = (union eth1394_hdr *)buf; | |
1048 | u16 ether_type = 0; /* initialized to clear warning */ | |
1049 | int hdr_len; | |
1050 | struct unit_directory *ud = priv->ud_list[NODEID_TO_NODE(srcid)]; | |
1051 | struct eth1394_node_info *node_info; | |
1052 | ||
1053 | if (!ud) { | |
1054 | struct eth1394_node_ref *node; | |
1055 | node = eth1394_find_node_nodeid(&priv->ip_node_list, srcid); | |
1056 | if (!node) { | |
1057 | HPSB_PRINT(KERN_ERR, "ether1394 rx: sender nodeid " | |
1058 | "lookup failure: " NODE_BUS_FMT, | |
1059 | NODE_BUS_ARGS(priv->host, srcid)); | |
1060 | priv->stats.rx_dropped++; | |
1061 | return -1; | |
1062 | } | |
1063 | ud = node->ud; | |
1064 | ||
1065 | priv->ud_list[NODEID_TO_NODE(srcid)] = ud; | |
1066 | } | |
1067 | ||
efbeccf1 | 1068 | node_info = (struct eth1394_node_info *)ud->device.driver_data; |
1da177e4 LT |
1069 | |
1070 | /* First, did we receive a fragmented or unfragmented datagram? */ | |
1071 | hdr->words.word1 = ntohs(hdr->words.word1); | |
1072 | ||
1073 | hdr_len = hdr_type_len[hdr->common.lf]; | |
1074 | ||
1075 | if (hdr->common.lf == ETH1394_HDR_LF_UF) { | |
1076 | /* An unfragmented datagram has been received by the ieee1394 | |
1077 | * bus. Build an skbuff around it so we can pass it to the | |
1078 | * high level network layer. */ | |
1079 | ||
1080 | skb = dev_alloc_skb(len + dev->hard_header_len + 15); | |
1081 | if (!skb) { | |
5009d269 | 1082 | ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); |
1da177e4 LT |
1083 | priv->stats.rx_dropped++; |
1084 | return -1; | |
1085 | } | |
1086 | skb_reserve(skb, (dev->hard_header_len + 15) & ~15); | |
efbeccf1 SR |
1087 | memcpy(skb_put(skb, len - hdr_len), buf + hdr_len, |
1088 | len - hdr_len); | |
1da177e4 LT |
1089 | ether_type = hdr->uf.ether_type; |
1090 | } else { | |
1091 | /* A datagram fragment has been received, now the fun begins. */ | |
1092 | ||
1093 | struct list_head *pdgl, *lh; | |
1094 | struct partial_datagram *pd; | |
1095 | int fg_off; | |
1096 | int fg_len = len - hdr_len; | |
1097 | int dg_size; | |
1098 | int dgl; | |
1099 | int retval; | |
1100 | struct pdg_list *pdg = &(node_info->pdg); | |
1101 | ||
1102 | hdr->words.word3 = ntohs(hdr->words.word3); | |
1103 | /* The 4th header word is reserved so no need to do ntohs() */ | |
1104 | ||
1105 | if (hdr->common.lf == ETH1394_HDR_LF_FF) { | |
1106 | ether_type = hdr->ff.ether_type; | |
1107 | dgl = hdr->ff.dgl; | |
1108 | dg_size = hdr->ff.dg_size + 1; | |
1109 | fg_off = 0; | |
1110 | } else { | |
1111 | hdr->words.word2 = ntohs(hdr->words.word2); | |
1112 | dgl = hdr->sf.dgl; | |
1113 | dg_size = hdr->sf.dg_size + 1; | |
1114 | fg_off = hdr->sf.fg_off; | |
1115 | } | |
1116 | spin_lock_irqsave(&pdg->lock, flags); | |
1117 | ||
1118 | pdgl = &(pdg->list); | |
1119 | lh = find_partial_datagram(pdgl, dgl); | |
1120 | ||
1121 | if (lh == NULL) { | |
1122 | while (pdg->sz >= max_partial_datagrams) { | |
1123 | /* remove the oldest */ | |
1124 | purge_partial_datagram(pdgl->prev); | |
1125 | pdg->sz--; | |
1126 | } | |
1127 | ||
1128 | retval = new_partial_datagram(dev, pdgl, dgl, dg_size, | |
1129 | buf + hdr_len, fg_off, | |
1130 | fg_len); | |
1131 | if (retval < 0) { | |
1132 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1133 | goto bad_proto; | |
1134 | } | |
1135 | pdg->sz++; | |
1136 | lh = find_partial_datagram(pdgl, dgl); | |
1137 | } else { | |
1138 | struct partial_datagram *pd; | |
1139 | ||
1140 | pd = list_entry(lh, struct partial_datagram, list); | |
1141 | ||
1142 | if (fragment_overlap(&pd->frag_info, fg_off, fg_len)) { | |
1143 | /* Overlapping fragments, obliterate old | |
1144 | * datagram and start new one. */ | |
1145 | purge_partial_datagram(lh); | |
1146 | retval = new_partial_datagram(dev, pdgl, dgl, | |
1147 | dg_size, | |
1148 | buf + hdr_len, | |
1149 | fg_off, fg_len); | |
1150 | if (retval < 0) { | |
1151 | pdg->sz--; | |
1152 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1153 | goto bad_proto; | |
1154 | } | |
1155 | } else { | |
1156 | retval = update_partial_datagram(pdgl, lh, | |
1157 | buf + hdr_len, | |
1158 | fg_off, fg_len); | |
1159 | if (retval < 0) { | |
1160 | /* Couldn't save off fragment anyway | |
1161 | * so might as well obliterate the | |
1162 | * datagram now. */ | |
1163 | purge_partial_datagram(lh); | |
1164 | pdg->sz--; | |
1165 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1166 | goto bad_proto; | |
1167 | } | |
1168 | } /* fragment overlap */ | |
1169 | } /* new datagram or add to existing one */ | |
1170 | ||
1171 | pd = list_entry(lh, struct partial_datagram, list); | |
1172 | ||
efbeccf1 | 1173 | if (hdr->common.lf == ETH1394_HDR_LF_FF) |
1da177e4 | 1174 | pd->ether_type = ether_type; |
1da177e4 LT |
1175 | |
1176 | if (is_datagram_complete(lh, dg_size)) { | |
1177 | ether_type = pd->ether_type; | |
1178 | pdg->sz--; | |
1179 | skb = skb_get(pd->skb); | |
1180 | purge_partial_datagram(lh); | |
1181 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1182 | } else { | |
1183 | /* Datagram is not complete, we're done for the | |
1184 | * moment. */ | |
1185 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1186 | return 0; | |
1187 | } | |
1188 | } /* unframgented datagram or fragmented one */ | |
1189 | ||
1190 | /* Write metadata, and then pass to the receive level */ | |
1191 | skb->dev = dev; | |
1192 | skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */ | |
1193 | ||
1194 | /* Parse the encapsulation header. This actually does the job of | |
1195 | * converting to an ethernet frame header, aswell as arp | |
1196 | * conversion if needed. ARP conversion is easier in this | |
1197 | * direction, since we are using ethernet as our backend. */ | |
1198 | skb->protocol = ether1394_parse_encap(skb, dev, srcid, destid, | |
1199 | ether_type); | |
1200 | ||
1da177e4 | 1201 | spin_lock_irqsave(&priv->lock, flags); |
efbeccf1 | 1202 | |
1da177e4 LT |
1203 | if (!skb->protocol) { |
1204 | priv->stats.rx_errors++; | |
1205 | priv->stats.rx_dropped++; | |
1206 | dev_kfree_skb_any(skb); | |
1207 | goto bad_proto; | |
1208 | } | |
1209 | ||
1210 | if (netif_rx(skb) == NET_RX_DROP) { | |
1211 | priv->stats.rx_errors++; | |
1212 | priv->stats.rx_dropped++; | |
1213 | goto bad_proto; | |
1214 | } | |
1215 | ||
1216 | /* Statistics */ | |
1217 | priv->stats.rx_packets++; | |
1218 | priv->stats.rx_bytes += skb->len; | |
1219 | ||
1220 | bad_proto: | |
1221 | if (netif_queue_stopped(dev)) | |
1222 | netif_wake_queue(dev); | |
1223 | spin_unlock_irqrestore(&priv->lock, flags); | |
1224 | ||
1225 | dev->last_rx = jiffies; | |
1226 | ||
1227 | return 0; | |
1228 | } | |
1229 | ||
1230 | static int ether1394_write(struct hpsb_host *host, int srcid, int destid, | |
1231 | quadlet_t *data, u64 addr, size_t len, u16 flags) | |
1232 | { | |
1233 | struct eth1394_host_info *hi; | |
1234 | ||
1235 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
1236 | if (hi == NULL) { | |
5009d269 SR |
1237 | ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n", |
1238 | host->id); | |
1da177e4 LT |
1239 | return RCODE_ADDRESS_ERROR; |
1240 | } | |
1241 | ||
1242 | if (ether1394_data_handler(hi->dev, srcid, destid, (char*)data, len)) | |
1243 | return RCODE_ADDRESS_ERROR; | |
1244 | else | |
1245 | return RCODE_COMPLETE; | |
1246 | } | |
1247 | ||
1248 | static void ether1394_iso(struct hpsb_iso *iso) | |
1249 | { | |
1250 | quadlet_t *data; | |
1251 | char *buf; | |
1252 | struct eth1394_host_info *hi; | |
1253 | struct net_device *dev; | |
1254 | struct eth1394_priv *priv; | |
1255 | unsigned int len; | |
1256 | u32 specifier_id; | |
1257 | u16 source_id; | |
1258 | int i; | |
1259 | int nready; | |
1260 | ||
1261 | hi = hpsb_get_hostinfo(ð1394_highlevel, iso->host); | |
1262 | if (hi == NULL) { | |
5009d269 SR |
1263 | ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n", |
1264 | iso->host->id); | |
1da177e4 LT |
1265 | return; |
1266 | } | |
1267 | ||
1268 | dev = hi->dev; | |
1269 | ||
1270 | nready = hpsb_iso_n_ready(iso); | |
1271 | for (i = 0; i < nready; i++) { | |
1272 | struct hpsb_iso_packet_info *info = | |
1273 | &iso->infos[(iso->first_packet + i) % iso->buf_packets]; | |
efbeccf1 | 1274 | data = (quadlet_t *)(iso->data_buf.kvirt + info->offset); |
1da177e4 LT |
1275 | |
1276 | /* skip over GASP header */ | |
1277 | buf = (char *)data + 8; | |
1278 | len = info->len - 8; | |
1279 | ||
efbeccf1 SR |
1280 | specifier_id = (be32_to_cpu(data[0]) & 0xffff) << 8 | |
1281 | (be32_to_cpu(data[1]) & 0xff000000) >> 24; | |
1da177e4 LT |
1282 | source_id = be32_to_cpu(data[0]) >> 16; |
1283 | ||
1284 | priv = netdev_priv(dev); | |
1285 | ||
efbeccf1 SR |
1286 | if (info->channel != (iso->host->csr.broadcast_channel & 0x3f) |
1287 | || specifier_id != ETHER1394_GASP_SPECIFIER_ID) { | |
1da177e4 LT |
1288 | /* This packet is not for us */ |
1289 | continue; | |
1290 | } | |
1291 | ether1394_data_handler(dev, source_id, LOCAL_BUS | ALL_NODES, | |
1292 | buf, len); | |
1293 | } | |
1294 | ||
1295 | hpsb_iso_recv_release_packets(iso, i); | |
1296 | ||
1297 | dev->last_rx = jiffies; | |
1298 | } | |
1299 | ||
1300 | /****************************************** | |
1301 | * Datagram transmission code | |
1302 | ******************************************/ | |
1303 | ||
1304 | /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire | |
1305 | * arphdr) is the same format as the ip1394 header, so they overlap. The rest | |
1306 | * needs to be munged a bit. The remainder of the arphdr is formatted based | |
1307 | * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to | |
1308 | * judge. | |
1309 | * | |
1310 | * Now that the EUI is used for the hardware address all we need to do to make | |
1311 | * this work for 1394 is to insert 2 quadlets that contain max_rec size, | |
1312 | * speed, and unicast FIFO address information between the sender_unique_id | |
1313 | * and the IP addresses. | |
1314 | */ | |
e00f04a7 SR |
1315 | static void ether1394_arp_to_1394arp(struct sk_buff *skb, |
1316 | struct net_device *dev) | |
1da177e4 LT |
1317 | { |
1318 | struct eth1394_priv *priv = netdev_priv(dev); | |
1da177e4 LT |
1319 | struct arphdr *arp = (struct arphdr *)skb->data; |
1320 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
1321 | struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data; | |
1322 | ||
1da177e4 LT |
1323 | arp1394->hw_addr_len = 16; |
1324 | arp1394->sip = *(u32*)(arp_ptr + ETH1394_ALEN); | |
1325 | arp1394->max_rec = priv->host->csr.max_rec; | |
1326 | arp1394->sspd = priv->host->csr.lnk_spd; | |
efbeccf1 SR |
1327 | arp1394->fifo_hi = htons(priv->local_fifo >> 32); |
1328 | arp1394->fifo_lo = htonl(priv->local_fifo & ~0x0); | |
1da177e4 LT |
1329 | } |
1330 | ||
1331 | /* We need to encapsulate the standard header with our own. We use the | |
1332 | * ethernet header's proto for our own. */ | |
e00f04a7 SR |
1333 | static unsigned int ether1394_encapsulate_prep(unsigned int max_payload, |
1334 | __be16 proto, | |
1335 | union eth1394_hdr *hdr, | |
1336 | u16 dg_size, u16 dgl) | |
1da177e4 | 1337 | { |
efbeccf1 SR |
1338 | unsigned int adj_max_payload = |
1339 | max_payload - hdr_type_len[ETH1394_HDR_LF_UF]; | |
1da177e4 LT |
1340 | |
1341 | /* Does it all fit in one packet? */ | |
1342 | if (dg_size <= adj_max_payload) { | |
1343 | hdr->uf.lf = ETH1394_HDR_LF_UF; | |
1344 | hdr->uf.ether_type = proto; | |
1345 | } else { | |
1346 | hdr->ff.lf = ETH1394_HDR_LF_FF; | |
1347 | hdr->ff.ether_type = proto; | |
1348 | hdr->ff.dg_size = dg_size - 1; | |
1349 | hdr->ff.dgl = dgl; | |
1350 | adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_FF]; | |
1351 | } | |
efbeccf1 | 1352 | return (dg_size + adj_max_payload - 1) / adj_max_payload; |
1da177e4 LT |
1353 | } |
1354 | ||
e00f04a7 SR |
1355 | static unsigned int ether1394_encapsulate(struct sk_buff *skb, |
1356 | unsigned int max_payload, | |
1357 | union eth1394_hdr *hdr) | |
1da177e4 LT |
1358 | { |
1359 | union eth1394_hdr *bufhdr; | |
1360 | int ftype = hdr->common.lf; | |
1361 | int hdrsz = hdr_type_len[ftype]; | |
1362 | unsigned int adj_max_payload = max_payload - hdrsz; | |
1363 | ||
efbeccf1 | 1364 | switch (ftype) { |
1da177e4 LT |
1365 | case ETH1394_HDR_LF_UF: |
1366 | bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz); | |
1367 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1368 | bufhdr->words.word2 = hdr->words.word2; | |
1369 | break; | |
1370 | ||
1371 | case ETH1394_HDR_LF_FF: | |
1372 | bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz); | |
1373 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1374 | bufhdr->words.word2 = hdr->words.word2; | |
1375 | bufhdr->words.word3 = htons(hdr->words.word3); | |
1376 | bufhdr->words.word4 = 0; | |
1377 | ||
1378 | /* Set frag type here for future interior fragments */ | |
1379 | hdr->common.lf = ETH1394_HDR_LF_IF; | |
1380 | hdr->sf.fg_off = 0; | |
1381 | break; | |
1382 | ||
1383 | default: | |
1384 | hdr->sf.fg_off += adj_max_payload; | |
1385 | bufhdr = (union eth1394_hdr *)skb_pull(skb, adj_max_payload); | |
1386 | if (max_payload >= skb->len) | |
1387 | hdr->common.lf = ETH1394_HDR_LF_LF; | |
1388 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1389 | bufhdr->words.word2 = htons(hdr->words.word2); | |
1390 | bufhdr->words.word3 = htons(hdr->words.word3); | |
1391 | bufhdr->words.word4 = 0; | |
1392 | } | |
1da177e4 LT |
1393 | return min(max_payload, skb->len); |
1394 | } | |
1395 | ||
e00f04a7 | 1396 | static struct hpsb_packet *ether1394_alloc_common_packet(struct hpsb_host *host) |
1da177e4 LT |
1397 | { |
1398 | struct hpsb_packet *p; | |
1399 | ||
1400 | p = hpsb_alloc_packet(0); | |
1401 | if (p) { | |
1402 | p->host = host; | |
1403 | p->generation = get_hpsb_generation(host); | |
1404 | p->type = hpsb_async; | |
1405 | } | |
1406 | return p; | |
1407 | } | |
1408 | ||
e00f04a7 SR |
1409 | static int ether1394_prep_write_packet(struct hpsb_packet *p, |
1410 | struct hpsb_host *host, nodeid_t node, | |
efbeccf1 | 1411 | u64 addr, void *data, int tx_len) |
1da177e4 LT |
1412 | { |
1413 | p->node_id = node; | |
1414 | p->data = NULL; | |
1415 | ||
1416 | p->tcode = TCODE_WRITEB; | |
efbeccf1 | 1417 | p->header[1] = host->node_id << 16 | addr >> 32; |
1da177e4 LT |
1418 | p->header[2] = addr & 0xffffffff; |
1419 | ||
1420 | p->header_size = 16; | |
1421 | p->expect_response = 1; | |
1422 | ||
1423 | if (hpsb_get_tlabel(p)) { | |
5009d269 | 1424 | ETH1394_PRINT_G(KERN_ERR, "Out of tlabels\n"); |
1da177e4 LT |
1425 | return -1; |
1426 | } | |
efbeccf1 SR |
1427 | p->header[0] = |
1428 | p->node_id << 16 | p->tlabel << 10 | 1 << 8 | TCODE_WRITEB << 4; | |
1da177e4 LT |
1429 | |
1430 | p->header[3] = tx_len << 16; | |
1431 | p->data_size = (tx_len + 3) & ~3; | |
efbeccf1 | 1432 | p->data = data; |
1da177e4 LT |
1433 | |
1434 | return 0; | |
1435 | } | |
1436 | ||
e00f04a7 SR |
1437 | static void ether1394_prep_gasp_packet(struct hpsb_packet *p, |
1438 | struct eth1394_priv *priv, | |
1439 | struct sk_buff *skb, int length) | |
1da177e4 LT |
1440 | { |
1441 | p->header_size = 4; | |
1442 | p->tcode = TCODE_STREAM_DATA; | |
1443 | ||
efbeccf1 SR |
1444 | p->header[0] = length << 16 | 3 << 14 | priv->broadcast_channel << 8 | |
1445 | TCODE_STREAM_DATA << 4; | |
1da177e4 | 1446 | p->data_size = length; |
efbeccf1 SR |
1447 | p->data = (quadlet_t *)skb->data - 2; |
1448 | p->data[0] = cpu_to_be32(priv->host->node_id << 16 | | |
1da177e4 | 1449 | ETHER1394_GASP_SPECIFIER_ID_HI); |
efbeccf1 | 1450 | p->data[1] = cpu_to_be32(ETHER1394_GASP_SPECIFIER_ID_LO << 24 | |
7136b807 | 1451 | ETHER1394_GASP_VERSION); |
1da177e4 LT |
1452 | |
1453 | /* Setting the node id to ALL_NODES (not LOCAL_BUS | ALL_NODES) | |
1454 | * prevents hpsb_send_packet() from setting the speed to an arbitrary | |
1455 | * value based on packet->node_id if packet->node_id is not set. */ | |
1456 | p->node_id = ALL_NODES; | |
1457 | p->speed_code = priv->bc_sspd; | |
1458 | } | |
1459 | ||
e00f04a7 | 1460 | static void ether1394_free_packet(struct hpsb_packet *packet) |
1da177e4 LT |
1461 | { |
1462 | if (packet->tcode != TCODE_STREAM_DATA) | |
1463 | hpsb_free_tlabel(packet); | |
1464 | hpsb_free_packet(packet); | |
1465 | } | |
1466 | ||
1467 | static void ether1394_complete_cb(void *__ptask); | |
1468 | ||
1469 | static int ether1394_send_packet(struct packet_task *ptask, unsigned int tx_len) | |
1470 | { | |
1471 | struct eth1394_priv *priv = ptask->priv; | |
1472 | struct hpsb_packet *packet = NULL; | |
1473 | ||
1474 | packet = ether1394_alloc_common_packet(priv->host); | |
1475 | if (!packet) | |
1476 | return -1; | |
1477 | ||
1478 | if (ptask->tx_type == ETH1394_GASP) { | |
efbeccf1 | 1479 | int length = tx_len + 2 * sizeof(quadlet_t); |
1da177e4 LT |
1480 | |
1481 | ether1394_prep_gasp_packet(packet, priv, ptask->skb, length); | |
1482 | } else if (ether1394_prep_write_packet(packet, priv->host, | |
1483 | ptask->dest_node, | |
1484 | ptask->addr, ptask->skb->data, | |
1485 | tx_len)) { | |
1486 | hpsb_free_packet(packet); | |
1487 | return -1; | |
1488 | } | |
1489 | ||
1490 | ptask->packet = packet; | |
1491 | hpsb_set_packet_complete_task(ptask->packet, ether1394_complete_cb, | |
1492 | ptask); | |
1493 | ||
1494 | if (hpsb_send_packet(packet) < 0) { | |
1495 | ether1394_free_packet(packet); | |
1496 | return -1; | |
1497 | } | |
1498 | ||
1499 | return 0; | |
1500 | } | |
1501 | ||
1da177e4 | 1502 | /* Task function to be run when a datagram transmission is completed */ |
e00f04a7 | 1503 | static void ether1394_dg_complete(struct packet_task *ptask, int fail) |
1da177e4 LT |
1504 | { |
1505 | struct sk_buff *skb = ptask->skb; | |
efbeccf1 | 1506 | struct eth1394_priv *priv = netdev_priv(skb->dev); |
1da177e4 LT |
1507 | unsigned long flags; |
1508 | ||
1509 | /* Statistics */ | |
1510 | spin_lock_irqsave(&priv->lock, flags); | |
1511 | if (fail) { | |
1512 | priv->stats.tx_dropped++; | |
1513 | priv->stats.tx_errors++; | |
1514 | } else { | |
1515 | priv->stats.tx_bytes += skb->len; | |
1516 | priv->stats.tx_packets++; | |
1517 | } | |
1518 | spin_unlock_irqrestore(&priv->lock, flags); | |
1519 | ||
1520 | dev_kfree_skb_any(skb); | |
1521 | kmem_cache_free(packet_task_cache, ptask); | |
1522 | } | |
1523 | ||
1da177e4 LT |
1524 | /* Callback for when a packet has been sent and the status of that packet is |
1525 | * known */ | |
1526 | static void ether1394_complete_cb(void *__ptask) | |
1527 | { | |
1528 | struct packet_task *ptask = (struct packet_task *)__ptask; | |
1529 | struct hpsb_packet *packet = ptask->packet; | |
1530 | int fail = 0; | |
1531 | ||
1532 | if (packet->tcode != TCODE_STREAM_DATA) | |
1533 | fail = hpsb_packet_success(packet); | |
1534 | ||
1535 | ether1394_free_packet(packet); | |
1536 | ||
1537 | ptask->outstanding_pkts--; | |
1538 | if (ptask->outstanding_pkts > 0 && !fail) { | |
1539 | int tx_len; | |
1540 | ||
1541 | /* Add the encapsulation header to the fragment */ | |
1542 | tx_len = ether1394_encapsulate(ptask->skb, ptask->max_payload, | |
1543 | &ptask->hdr); | |
1544 | if (ether1394_send_packet(ptask, tx_len)) | |
1545 | ether1394_dg_complete(ptask, 1); | |
1546 | } else { | |
1547 | ether1394_dg_complete(ptask, fail); | |
1548 | } | |
1549 | } | |
1550 | ||
1da177e4 | 1551 | /* Transmit a packet (called by kernel) */ |
efbeccf1 | 1552 | static int ether1394_tx(struct sk_buff *skb, struct net_device *dev) |
1da177e4 | 1553 | { |
b4e3ca1a | 1554 | gfp_t kmflags = in_interrupt() ? GFP_ATOMIC : GFP_KERNEL; |
1da177e4 LT |
1555 | struct eth1394hdr *eth; |
1556 | struct eth1394_priv *priv = netdev_priv(dev); | |
02f4213f | 1557 | __be16 proto; |
1da177e4 LT |
1558 | unsigned long flags; |
1559 | nodeid_t dest_node; | |
1560 | eth1394_tx_type tx_type; | |
1561 | int ret = 0; | |
1562 | unsigned int tx_len; | |
1563 | unsigned int max_payload; | |
1564 | u16 dg_size; | |
1565 | u16 dgl; | |
1566 | struct packet_task *ptask; | |
1567 | struct eth1394_node_ref *node; | |
1568 | struct eth1394_node_info *node_info = NULL; | |
1569 | ||
1570 | ptask = kmem_cache_alloc(packet_task_cache, kmflags); | |
1571 | if (ptask == NULL) { | |
1572 | ret = -ENOMEM; | |
1573 | goto fail; | |
1574 | } | |
1575 | ||
1576 | /* XXX Ignore this for now. Noticed that when MacOSX is the IRM, | |
1577 | * it does not set our validity bit. We need to compensate for | |
1578 | * that somewhere else, but not in eth1394. */ | |
1579 | #if 0 | |
1580 | if ((priv->host->csr.broadcast_channel & 0xc0000000) != 0xc0000000) { | |
1581 | ret = -EAGAIN; | |
1582 | goto fail; | |
1583 | } | |
1584 | #endif | |
1585 | ||
efbeccf1 SR |
1586 | skb = skb_share_check(skb, kmflags); |
1587 | if (!skb) { | |
1da177e4 LT |
1588 | ret = -ENOMEM; |
1589 | goto fail; | |
1590 | } | |
1591 | ||
1592 | /* Get rid of the fake eth1394 header, but save a pointer */ | |
efbeccf1 | 1593 | eth = (struct eth1394hdr *)skb->data; |
1da177e4 LT |
1594 | skb_pull(skb, ETH1394_HLEN); |
1595 | ||
1596 | proto = eth->h_proto; | |
1597 | dg_size = skb->len; | |
1598 | ||
1599 | /* Set the transmission type for the packet. ARP packets and IP | |
1600 | * broadcast packets are sent via GASP. */ | |
1601 | if (memcmp(eth->h_dest, dev->broadcast, ETH1394_ALEN) == 0 || | |
7136b807 BC |
1602 | proto == htons(ETH_P_ARP) || |
1603 | (proto == htons(ETH_P_IP) && | |
eddc9ec5 | 1604 | IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) { |
1da177e4 LT |
1605 | tx_type = ETH1394_GASP; |
1606 | dest_node = LOCAL_BUS | ALL_NODES; | |
1607 | max_payload = priv->bc_maxpayload - ETHER1394_GASP_OVERHEAD; | |
efbeccf1 | 1608 | BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD); |
1da177e4 LT |
1609 | dgl = priv->bc_dgl; |
1610 | if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF]) | |
1611 | priv->bc_dgl++; | |
1612 | } else { | |
c20e3945 DM |
1613 | __be64 guid = get_unaligned((u64 *)eth->h_dest); |
1614 | ||
1da177e4 | 1615 | node = eth1394_find_node_guid(&priv->ip_node_list, |
c20e3945 | 1616 | be64_to_cpu(guid)); |
1da177e4 LT |
1617 | if (!node) { |
1618 | ret = -EAGAIN; | |
1619 | goto fail; | |
1620 | } | |
efbeccf1 SR |
1621 | node_info = |
1622 | (struct eth1394_node_info *)node->ud->device.driver_data; | |
6737231e | 1623 | if (node_info->fifo == CSR1212_INVALID_ADDR_SPACE) { |
1da177e4 LT |
1624 | ret = -EAGAIN; |
1625 | goto fail; | |
1626 | } | |
1627 | ||
1628 | dest_node = node->ud->ne->nodeid; | |
1629 | max_payload = node_info->maxpayload; | |
efbeccf1 | 1630 | BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD); |
1da177e4 LT |
1631 | |
1632 | dgl = node_info->dgl; | |
1633 | if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF]) | |
1634 | node_info->dgl++; | |
1635 | tx_type = ETH1394_WRREQ; | |
1636 | } | |
1637 | ||
1638 | /* If this is an ARP packet, convert it */ | |
7136b807 | 1639 | if (proto == htons(ETH_P_ARP)) |
efbeccf1 | 1640 | ether1394_arp_to_1394arp(skb, dev); |
1da177e4 LT |
1641 | |
1642 | ptask->hdr.words.word1 = 0; | |
1643 | ptask->hdr.words.word2 = 0; | |
1644 | ptask->hdr.words.word3 = 0; | |
1645 | ptask->hdr.words.word4 = 0; | |
1646 | ptask->skb = skb; | |
1647 | ptask->priv = priv; | |
1648 | ptask->tx_type = tx_type; | |
1649 | ||
1650 | if (tx_type != ETH1394_GASP) { | |
1651 | u64 addr; | |
1652 | ||
1653 | spin_lock_irqsave(&priv->lock, flags); | |
1654 | addr = node_info->fifo; | |
1655 | spin_unlock_irqrestore(&priv->lock, flags); | |
1656 | ||
1657 | ptask->addr = addr; | |
1658 | ptask->dest_node = dest_node; | |
1659 | } | |
1660 | ||
1661 | ptask->tx_type = tx_type; | |
1662 | ptask->max_payload = max_payload; | |
efbeccf1 SR |
1663 | ptask->outstanding_pkts = ether1394_encapsulate_prep(max_payload, |
1664 | proto, &ptask->hdr, dg_size, dgl); | |
1da177e4 LT |
1665 | |
1666 | /* Add the encapsulation header to the fragment */ | |
1667 | tx_len = ether1394_encapsulate(skb, max_payload, &ptask->hdr); | |
1668 | dev->trans_start = jiffies; | |
1669 | if (ether1394_send_packet(ptask, tx_len)) | |
1670 | goto fail; | |
1671 | ||
1672 | netif_wake_queue(dev); | |
1673 | return 0; | |
1674 | fail: | |
1675 | if (ptask) | |
1676 | kmem_cache_free(packet_task_cache, ptask); | |
1677 | ||
1678 | if (skb != NULL) | |
1679 | dev_kfree_skb(skb); | |
1680 | ||
efbeccf1 | 1681 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
1682 | priv->stats.tx_dropped++; |
1683 | priv->stats.tx_errors++; | |
efbeccf1 | 1684 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
1685 | |
1686 | if (netif_queue_stopped(dev)) | |
1687 | netif_wake_queue(dev); | |
1688 | ||
1689 | return 0; /* returning non-zero causes serious problems */ | |
1690 | } | |
1691 | ||
efbeccf1 SR |
1692 | static void ether1394_get_drvinfo(struct net_device *dev, |
1693 | struct ethtool_drvinfo *info) | |
1da177e4 | 1694 | { |
efbeccf1 SR |
1695 | strcpy(info->driver, driver_name); |
1696 | strcpy(info->bus_info, "ieee1394"); /* FIXME provide more detail? */ | |
1da177e4 LT |
1697 | } |
1698 | ||
1699 | static struct ethtool_ops ethtool_ops = { | |
1700 | .get_drvinfo = ether1394_get_drvinfo | |
1701 | }; | |
1702 | ||
1703 | static int __init ether1394_init_module (void) | |
1704 | { | |
efbeccf1 SR |
1705 | packet_task_cache = kmem_cache_create("packet_task", |
1706 | sizeof(struct packet_task), | |
1da177e4 LT |
1707 | 0, 0, NULL, NULL); |
1708 | ||
1da177e4 | 1709 | hpsb_register_highlevel(ð1394_highlevel); |
1da177e4 LT |
1710 | return hpsb_register_protocol(ð1394_proto_driver); |
1711 | } | |
1712 | ||
1713 | static void __exit ether1394_exit_module (void) | |
1714 | { | |
1715 | hpsb_unregister_protocol(ð1394_proto_driver); | |
1716 | hpsb_unregister_highlevel(ð1394_highlevel); | |
1717 | kmem_cache_destroy(packet_task_cache); | |
1718 | } | |
1719 | ||
1720 | module_init(ether1394_init_module); | |
1721 | module_exit(ether1394_exit_module); |