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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 | /* For now, this needs to be 1500, so that XP works with us */ |
140 | #define ETH1394_DATA_LEN ETH_DATA_LEN | |
141 | ||
142 | static const u16 eth1394_speedto_maxpayload[] = { | |
143 | /* S100, S200, S400, S800, S1600, S3200 */ | |
144 | 512, 1024, 2048, 4096, 4096, 4096 | |
145 | }; | |
146 | ||
147 | MODULE_AUTHOR("Ben Collins (bcollins@debian.org)"); | |
148 | MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)"); | |
149 | MODULE_LICENSE("GPL"); | |
150 | ||
efbeccf1 SR |
151 | /* |
152 | * The max_partial_datagrams parameter is the maximum number of fragmented | |
1da177e4 LT |
153 | * datagrams per node that eth1394 will keep in memory. Providing an upper |
154 | * bound allows us to limit the amount of memory that partial datagrams | |
155 | * consume in the event that some partial datagrams are never completed. | |
156 | */ | |
157 | static int max_partial_datagrams = 25; | |
158 | module_param(max_partial_datagrams, int, S_IRUGO | S_IWUSR); | |
159 | MODULE_PARM_DESC(max_partial_datagrams, | |
160 | "Maximum number of partially received fragmented datagrams " | |
161 | "(default = 25)."); | |
162 | ||
163 | ||
164 | static int ether1394_header(struct sk_buff *skb, struct net_device *dev, | |
165 | unsigned short type, void *daddr, void *saddr, | |
166 | unsigned len); | |
167 | static int ether1394_rebuild_header(struct sk_buff *skb); | |
168 | static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr); | |
169 | static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh); | |
170 | static void ether1394_header_cache_update(struct hh_cache *hh, | |
171 | struct net_device *dev, | |
efbeccf1 | 172 | unsigned char *haddr); |
1da177e4 LT |
173 | static int ether1394_mac_addr(struct net_device *dev, void *p); |
174 | ||
1da177e4 LT |
175 | static int ether1394_tx(struct sk_buff *skb, struct net_device *dev); |
176 | static void ether1394_iso(struct hpsb_iso *iso); | |
177 | ||
178 | static struct ethtool_ops ethtool_ops; | |
179 | ||
180 | static int ether1394_write(struct hpsb_host *host, int srcid, int destid, | |
181 | quadlet_t *data, u64 addr, size_t len, u16 flags); | |
efbeccf1 SR |
182 | static void ether1394_add_host(struct hpsb_host *host); |
183 | static void ether1394_remove_host(struct hpsb_host *host); | |
184 | static void ether1394_host_reset(struct hpsb_host *host); | |
1da177e4 LT |
185 | |
186 | /* Function for incoming 1394 packets */ | |
187 | static struct hpsb_address_ops addr_ops = { | |
188 | .write = ether1394_write, | |
189 | }; | |
190 | ||
191 | /* Ieee1394 highlevel driver functions */ | |
192 | static struct hpsb_highlevel eth1394_highlevel = { | |
193 | .name = driver_name, | |
194 | .add_host = ether1394_add_host, | |
195 | .remove_host = ether1394_remove_host, | |
196 | .host_reset = ether1394_host_reset, | |
197 | }; | |
198 | ||
09d7a96f JD |
199 | static int ether1394_recv_init(struct net_device *dev) |
200 | { | |
201 | struct eth1394_priv *priv = netdev_priv(dev); | |
efbeccf1 SR |
202 | unsigned int iso_buf_size; |
203 | ||
204 | /* FIXME: rawiso limits us to PAGE_SIZE */ | |
205 | iso_buf_size = min((unsigned int)PAGE_SIZE, | |
206 | 2 * (1U << (priv->host->csr.max_rec + 1))); | |
09d7a96f JD |
207 | |
208 | priv->iso = hpsb_iso_recv_init(priv->host, | |
efbeccf1 | 209 | ETHER1394_GASP_BUFFERS * iso_buf_size, |
09d7a96f JD |
210 | ETHER1394_GASP_BUFFERS, |
211 | priv->broadcast_channel, | |
212 | HPSB_ISO_DMA_PACKET_PER_BUFFER, | |
213 | 1, ether1394_iso); | |
214 | if (priv->iso == NULL) { | |
215 | ETH1394_PRINT(KERN_ERR, dev->name, | |
216 | "Could not allocate isochronous receive " | |
217 | "context for the broadcast channel\n"); | |
218 | priv->bc_state = ETHER1394_BC_ERROR; | |
219 | return -EAGAIN; | |
220 | } | |
221 | ||
222 | if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0) | |
223 | priv->bc_state = ETHER1394_BC_STOPPED; | |
224 | else | |
225 | priv->bc_state = ETHER1394_BC_RUNNING; | |
226 | return 0; | |
227 | } | |
228 | ||
1da177e4 | 229 | /* This is called after an "ifup" */ |
09d7a96f | 230 | static int ether1394_open(struct net_device *dev) |
1da177e4 LT |
231 | { |
232 | struct eth1394_priv *priv = netdev_priv(dev); | |
09d7a96f | 233 | int ret; |
1da177e4 | 234 | |
1da177e4 | 235 | if (priv->bc_state == ETHER1394_BC_ERROR) { |
09d7a96f JD |
236 | ret = ether1394_recv_init(dev); |
237 | if (ret) | |
238 | return ret; | |
1da177e4 | 239 | } |
efbeccf1 | 240 | netif_start_queue(dev); |
1da177e4 LT |
241 | return 0; |
242 | } | |
243 | ||
244 | /* This is called after an "ifdown" */ | |
efbeccf1 | 245 | static int ether1394_stop(struct net_device *dev) |
1da177e4 | 246 | { |
efbeccf1 | 247 | netif_stop_queue(dev); |
1da177e4 LT |
248 | return 0; |
249 | } | |
250 | ||
251 | /* Return statistics to the caller */ | |
efbeccf1 | 252 | static struct net_device_stats *ether1394_stats(struct net_device *dev) |
1da177e4 LT |
253 | { |
254 | return &(((struct eth1394_priv *)netdev_priv(dev))->stats); | |
255 | } | |
256 | ||
efbeccf1 SR |
257 | /* FIXME: What to do if we timeout? I think a host reset is probably in order, |
258 | * so that's what we do. Should we increment the stat counters too? */ | |
259 | static void ether1394_tx_timeout(struct net_device *dev) | |
1da177e4 | 260 | { |
efbeccf1 SR |
261 | struct hpsb_host *host = |
262 | ((struct eth1394_priv *)netdev_priv(dev))->host; | |
1da177e4 | 263 | |
efbeccf1 SR |
264 | ETH1394_PRINT(KERN_ERR, dev->name, "Timeout, resetting host %s\n", |
265 | host->driver->name); | |
266 | highlevel_host_reset(host); | |
267 | netif_wake_queue(dev); | |
1da177e4 LT |
268 | } |
269 | ||
270 | static int ether1394_change_mtu(struct net_device *dev, int new_mtu) | |
271 | { | |
efbeccf1 SR |
272 | int max_rec = |
273 | ((struct eth1394_priv *)netdev_priv(dev))->host->csr.max_rec; | |
1da177e4 | 274 | |
efbeccf1 SR |
275 | if (new_mtu < 68 || |
276 | new_mtu > ETH1394_DATA_LEN || | |
277 | new_mtu > (1 << (max_rec + 1)) - sizeof(union eth1394_hdr) - | |
278 | ETHER1394_GASP_OVERHEAD) | |
1da177e4 | 279 | return -EINVAL; |
efbeccf1 | 280 | |
1da177e4 LT |
281 | dev->mtu = new_mtu; |
282 | return 0; | |
283 | } | |
284 | ||
285 | static void purge_partial_datagram(struct list_head *old) | |
286 | { | |
efbeccf1 | 287 | struct partial_datagram *pd; |
1da177e4 | 288 | struct list_head *lh, *n; |
efbeccf1 SR |
289 | struct fragment_info *fi; |
290 | ||
291 | pd = list_entry(old, struct partial_datagram, list); | |
1da177e4 LT |
292 | |
293 | list_for_each_safe(lh, n, &pd->frag_info) { | |
efbeccf1 | 294 | fi = list_entry(lh, struct fragment_info, list); |
1da177e4 LT |
295 | list_del(lh); |
296 | kfree(fi); | |
297 | } | |
298 | list_del(old); | |
299 | kfree_skb(pd->skb); | |
300 | kfree(pd); | |
301 | } | |
302 | ||
303 | /****************************************** | |
304 | * 1394 bus activity functions | |
305 | ******************************************/ | |
306 | ||
307 | static struct eth1394_node_ref *eth1394_find_node(struct list_head *inl, | |
308 | struct unit_directory *ud) | |
309 | { | |
310 | struct eth1394_node_ref *node; | |
311 | ||
312 | list_for_each_entry(node, inl, list) | |
313 | if (node->ud == ud) | |
314 | return node; | |
315 | ||
316 | return NULL; | |
317 | } | |
318 | ||
319 | static struct eth1394_node_ref *eth1394_find_node_guid(struct list_head *inl, | |
320 | u64 guid) | |
321 | { | |
322 | struct eth1394_node_ref *node; | |
323 | ||
324 | list_for_each_entry(node, inl, list) | |
325 | if (node->ud->ne->guid == guid) | |
326 | return node; | |
327 | ||
328 | return NULL; | |
329 | } | |
330 | ||
331 | static struct eth1394_node_ref *eth1394_find_node_nodeid(struct list_head *inl, | |
332 | nodeid_t nodeid) | |
333 | { | |
334 | struct eth1394_node_ref *node; | |
efbeccf1 SR |
335 | |
336 | list_for_each_entry(node, inl, list) | |
1da177e4 LT |
337 | if (node->ud->ne->nodeid == nodeid) |
338 | return node; | |
1da177e4 LT |
339 | |
340 | return NULL; | |
341 | } | |
342 | ||
d06c1dda SR |
343 | static int eth1394_new_node(struct eth1394_host_info *hi, |
344 | struct unit_directory *ud) | |
1da177e4 | 345 | { |
1da177e4 LT |
346 | struct eth1394_priv *priv; |
347 | struct eth1394_node_ref *new_node; | |
348 | struct eth1394_node_info *node_info; | |
349 | ||
5e7abccd | 350 | new_node = kmalloc(sizeof(*new_node), GFP_KERNEL); |
1da177e4 LT |
351 | if (!new_node) |
352 | return -ENOMEM; | |
353 | ||
5e7abccd | 354 | node_info = kmalloc(sizeof(*node_info), GFP_KERNEL); |
1da177e4 LT |
355 | if (!node_info) { |
356 | kfree(new_node); | |
357 | return -ENOMEM; | |
358 | } | |
359 | ||
360 | spin_lock_init(&node_info->pdg.lock); | |
361 | INIT_LIST_HEAD(&node_info->pdg.list); | |
362 | node_info->pdg.sz = 0; | |
6737231e | 363 | node_info->fifo = CSR1212_INVALID_ADDR_SPACE; |
1da177e4 LT |
364 | |
365 | ud->device.driver_data = node_info; | |
366 | new_node->ud = ud; | |
367 | ||
368 | priv = netdev_priv(hi->dev); | |
369 | list_add_tail(&new_node->list, &priv->ip_node_list); | |
1da177e4 LT |
370 | return 0; |
371 | } | |
372 | ||
d06c1dda SR |
373 | static int eth1394_probe(struct device *dev) |
374 | { | |
375 | struct unit_directory *ud; | |
376 | struct eth1394_host_info *hi; | |
377 | ||
378 | ud = container_of(dev, struct unit_directory, device); | |
379 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
380 | if (!hi) | |
381 | return -ENOENT; | |
382 | ||
383 | return eth1394_new_node(hi, ud); | |
384 | } | |
385 | ||
1da177e4 LT |
386 | static int eth1394_remove(struct device *dev) |
387 | { | |
388 | struct unit_directory *ud; | |
389 | struct eth1394_host_info *hi; | |
390 | struct eth1394_priv *priv; | |
391 | struct eth1394_node_ref *old_node; | |
392 | struct eth1394_node_info *node_info; | |
393 | struct list_head *lh, *n; | |
394 | unsigned long flags; | |
395 | ||
396 | ud = container_of(dev, struct unit_directory, device); | |
397 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
398 | if (!hi) | |
399 | return -ENOENT; | |
400 | ||
401 | priv = netdev_priv(hi->dev); | |
402 | ||
403 | old_node = eth1394_find_node(&priv->ip_node_list, ud); | |
efbeccf1 SR |
404 | if (!old_node) |
405 | return 0; | |
1da177e4 | 406 | |
efbeccf1 SR |
407 | list_del(&old_node->list); |
408 | kfree(old_node); | |
1da177e4 | 409 | |
efbeccf1 | 410 | node_info = (struct eth1394_node_info*)ud->device.driver_data; |
1da177e4 | 411 | |
efbeccf1 SR |
412 | spin_lock_irqsave(&node_info->pdg.lock, flags); |
413 | /* The partial datagram list should be empty, but we'll just | |
414 | * make sure anyway... */ | |
415 | list_for_each_safe(lh, n, &node_info->pdg.list) | |
416 | purge_partial_datagram(lh); | |
417 | spin_unlock_irqrestore(&node_info->pdg.lock, flags); | |
1da177e4 | 418 | |
efbeccf1 SR |
419 | kfree(node_info); |
420 | ud->device.driver_data = NULL; | |
1da177e4 LT |
421 | return 0; |
422 | } | |
423 | ||
424 | static int eth1394_update(struct unit_directory *ud) | |
425 | { | |
426 | struct eth1394_host_info *hi; | |
427 | struct eth1394_priv *priv; | |
428 | struct eth1394_node_ref *node; | |
1da177e4 LT |
429 | |
430 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); | |
431 | if (!hi) | |
432 | return -ENOENT; | |
433 | ||
434 | priv = netdev_priv(hi->dev); | |
1da177e4 | 435 | node = eth1394_find_node(&priv->ip_node_list, ud); |
efbeccf1 SR |
436 | if (node) |
437 | return 0; | |
1da177e4 | 438 | |
d06c1dda | 439 | return eth1394_new_node(hi, ud); |
1da177e4 LT |
440 | } |
441 | ||
1da177e4 LT |
442 | static struct ieee1394_device_id eth1394_id_table[] = { |
443 | { | |
444 | .match_flags = (IEEE1394_MATCH_SPECIFIER_ID | | |
445 | IEEE1394_MATCH_VERSION), | |
446 | .specifier_id = ETHER1394_GASP_SPECIFIER_ID, | |
447 | .version = ETHER1394_GASP_VERSION, | |
448 | }, | |
449 | {} | |
450 | }; | |
451 | ||
452 | MODULE_DEVICE_TABLE(ieee1394, eth1394_id_table); | |
453 | ||
454 | static struct hpsb_protocol_driver eth1394_proto_driver = { | |
efbeccf1 | 455 | .name = driver_name, |
1da177e4 LT |
456 | .id_table = eth1394_id_table, |
457 | .update = eth1394_update, | |
458 | .driver = { | |
1da177e4 LT |
459 | .probe = eth1394_probe, |
460 | .remove = eth1394_remove, | |
461 | }, | |
462 | }; | |
463 | ||
efbeccf1 | 464 | static void ether1394_reset_priv(struct net_device *dev, int set_mtu) |
1da177e4 LT |
465 | { |
466 | unsigned long flags; | |
467 | int i; | |
468 | struct eth1394_priv *priv = netdev_priv(dev); | |
469 | struct hpsb_host *host = priv->host; | |
efbeccf1 | 470 | u64 guid = get_unaligned((u64 *)&(host->csr.rom->bus_info_data[3])); |
1da177e4 LT |
471 | int max_speed = IEEE1394_SPEED_MAX; |
472 | ||
efbeccf1 | 473 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 474 | |
027611b8 | 475 | memset(priv->ud_list, 0, sizeof(priv->ud_list)); |
1da177e4 LT |
476 | priv->bc_maxpayload = 512; |
477 | ||
478 | /* Determine speed limit */ | |
479 | for (i = 0; i < host->node_count; i++) | |
647dcb5f BC |
480 | if (max_speed > host->speed[i]) |
481 | max_speed = host->speed[i]; | |
1da177e4 LT |
482 | priv->bc_sspd = max_speed; |
483 | ||
efbeccf1 | 484 | /* We'll use our maximum payload as the default MTU */ |
1da177e4 | 485 | if (set_mtu) { |
efbeccf1 SR |
486 | int max_payload = 1 << (host->csr.max_rec + 1); |
487 | ||
1da177e4 | 488 | dev->mtu = min(ETH1394_DATA_LEN, |
efbeccf1 SR |
489 | (int)(max_payload - sizeof(union eth1394_hdr) - |
490 | ETHER1394_GASP_OVERHEAD)); | |
1da177e4 LT |
491 | |
492 | /* Set our hardware address while we're at it */ | |
c20e3945 DM |
493 | memcpy(dev->dev_addr, &guid, sizeof(u64)); |
494 | memset(dev->broadcast, 0xff, sizeof(u64)); | |
1da177e4 LT |
495 | } |
496 | ||
efbeccf1 | 497 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
498 | } |
499 | ||
500 | /* This function is called right before register_netdev */ | |
efbeccf1 | 501 | static void ether1394_init_dev(struct net_device *dev) |
1da177e4 LT |
502 | { |
503 | /* Our functions */ | |
504 | dev->open = ether1394_open; | |
505 | dev->stop = ether1394_stop; | |
506 | dev->hard_start_xmit = ether1394_tx; | |
507 | dev->get_stats = ether1394_stats; | |
508 | dev->tx_timeout = ether1394_tx_timeout; | |
509 | dev->change_mtu = ether1394_change_mtu; | |
510 | ||
511 | dev->hard_header = ether1394_header; | |
512 | dev->rebuild_header = ether1394_rebuild_header; | |
513 | dev->hard_header_cache = ether1394_header_cache; | |
514 | dev->header_cache_update= ether1394_header_cache_update; | |
515 | dev->hard_header_parse = ether1394_header_parse; | |
516 | dev->set_mac_address = ether1394_mac_addr; | |
517 | SET_ETHTOOL_OPS(dev, ðtool_ops); | |
518 | ||
519 | /* Some constants */ | |
520 | dev->watchdog_timeo = ETHER1394_TIMEOUT; | |
521 | dev->flags = IFF_BROADCAST | IFF_MULTICAST; | |
522 | dev->features = NETIF_F_HIGHDMA; | |
523 | dev->addr_len = ETH1394_ALEN; | |
524 | dev->hard_header_len = ETH1394_HLEN; | |
525 | dev->type = ARPHRD_IEEE1394; | |
526 | ||
efbeccf1 | 527 | ether1394_reset_priv(dev, 1); |
1da177e4 LT |
528 | } |
529 | ||
530 | /* | |
531 | * This function is called every time a card is found. It is generally called | |
532 | * when the module is installed. This is where we add all of our ethernet | |
533 | * devices. One for each host. | |
534 | */ | |
efbeccf1 | 535 | static void ether1394_add_host(struct hpsb_host *host) |
1da177e4 LT |
536 | { |
537 | struct eth1394_host_info *hi = NULL; | |
538 | struct net_device *dev = NULL; | |
539 | struct eth1394_priv *priv; | |
1da177e4 LT |
540 | u64 fifo_addr; |
541 | ||
70093cfd SR |
542 | if (hpsb_config_rom_ip1394_add(host) != 0) { |
543 | ETH1394_PRINT_G(KERN_ERR, "Can't add IP-over-1394 ROM entry\n"); | |
1da177e4 | 544 | return; |
70093cfd | 545 | } |
1da177e4 | 546 | |
6737231e BC |
547 | fifo_addr = hpsb_allocate_and_register_addrspace( |
548 | ð1394_highlevel, host, &addr_ops, | |
549 | ETHER1394_REGION_ADDR_LEN, ETHER1394_REGION_ADDR_LEN, | |
550 | CSR1212_INVALID_ADDR_SPACE, CSR1212_INVALID_ADDR_SPACE); | |
157188cb SR |
551 | if (fifo_addr == CSR1212_INVALID_ADDR_SPACE) { |
552 | ETH1394_PRINT_G(KERN_ERR, "Cannot register CSR space\n"); | |
70093cfd | 553 | hpsb_config_rom_ip1394_remove(host); |
157188cb SR |
554 | return; |
555 | } | |
1da177e4 | 556 | |
1da177e4 LT |
557 | /* We should really have our own alloc_hpsbdev() function in |
558 | * net_init.c instead of calling the one for ethernet then hijacking | |
559 | * it for ourselves. That way we'd be a real networking device. */ | |
560 | dev = alloc_etherdev(sizeof (struct eth1394_priv)); | |
561 | ||
562 | if (dev == NULL) { | |
563 | ETH1394_PRINT_G (KERN_ERR, "Out of memory trying to allocate " | |
564 | "etherdevice for IEEE 1394 device %s-%d\n", | |
565 | host->driver->name, host->id); | |
566 | goto out; | |
efbeccf1 | 567 | } |
1da177e4 LT |
568 | |
569 | SET_MODULE_OWNER(dev); | |
7a9eeb2f SR |
570 | #if 0 |
571 | /* FIXME - Is this the correct parent device anyway? */ | |
1da177e4 | 572 | SET_NETDEV_DEV(dev, &host->device); |
7a9eeb2f | 573 | #endif |
1da177e4 LT |
574 | |
575 | priv = netdev_priv(dev); | |
576 | ||
577 | INIT_LIST_HEAD(&priv->ip_node_list); | |
578 | ||
579 | spin_lock_init(&priv->lock); | |
580 | priv->host = host; | |
581 | priv->local_fifo = fifo_addr; | |
582 | ||
583 | hi = hpsb_create_hostinfo(ð1394_highlevel, host, sizeof(*hi)); | |
584 | ||
585 | if (hi == NULL) { | |
586 | ETH1394_PRINT_G (KERN_ERR, "Out of memory trying to create " | |
587 | "hostinfo for IEEE 1394 device %s-%d\n", | |
588 | host->driver->name, host->id); | |
589 | goto out; | |
efbeccf1 | 590 | } |
1da177e4 LT |
591 | |
592 | ether1394_init_dev(dev); | |
593 | ||
594 | if (register_netdev (dev)) { | |
595 | ETH1394_PRINT (KERN_ERR, dev->name, "Error registering network driver\n"); | |
596 | goto out; | |
597 | } | |
598 | ||
599 | ETH1394_PRINT (KERN_INFO, dev->name, "IEEE-1394 IPv4 over 1394 Ethernet (fw-host%d)\n", | |
600 | host->id); | |
601 | ||
602 | hi->host = host; | |
603 | hi->dev = dev; | |
604 | ||
605 | /* Ignore validity in hopes that it will be set in the future. It'll | |
606 | * be checked when the eth device is opened. */ | |
607 | priv->broadcast_channel = host->csr.broadcast_channel & 0x3f; | |
608 | ||
09d7a96f | 609 | ether1394_recv_init(dev); |
1da177e4 | 610 | return; |
1da177e4 | 611 | out: |
157188cb | 612 | if (dev) |
1da177e4 LT |
613 | free_netdev(dev); |
614 | if (hi) | |
615 | hpsb_destroy_hostinfo(ð1394_highlevel, host); | |
157188cb | 616 | hpsb_unregister_addrspace(ð1394_highlevel, host, fifo_addr); |
70093cfd | 617 | hpsb_config_rom_ip1394_remove(host); |
1da177e4 LT |
618 | } |
619 | ||
620 | /* Remove a card from our list */ | |
efbeccf1 | 621 | static void ether1394_remove_host(struct hpsb_host *host) |
1da177e4 LT |
622 | { |
623 | struct eth1394_host_info *hi; | |
2cd556ae | 624 | struct eth1394_priv *priv; |
1da177e4 LT |
625 | |
626 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
2cd556ae SR |
627 | if (!hi) |
628 | return; | |
629 | priv = netdev_priv(hi->dev); | |
630 | hpsb_unregister_addrspace(ð1394_highlevel, host, priv->local_fifo); | |
70093cfd | 631 | hpsb_config_rom_ip1394_remove(host); |
2cd556ae SR |
632 | if (priv->iso) |
633 | hpsb_iso_shutdown(priv->iso); | |
634 | unregister_netdev(hi->dev); | |
635 | free_netdev(hi->dev); | |
1da177e4 LT |
636 | } |
637 | ||
efbeccf1 SR |
638 | /* A bus reset happened */ |
639 | static void ether1394_host_reset(struct hpsb_host *host) | |
1da177e4 LT |
640 | { |
641 | struct eth1394_host_info *hi; | |
642 | struct eth1394_priv *priv; | |
643 | struct net_device *dev; | |
644 | struct list_head *lh, *n; | |
645 | struct eth1394_node_ref *node; | |
646 | struct eth1394_node_info *node_info; | |
647 | unsigned long flags; | |
648 | ||
649 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
650 | ||
651 | /* This can happen for hosts that we don't use */ | |
2cd556ae | 652 | if (!hi) |
1da177e4 LT |
653 | return; |
654 | ||
655 | dev = hi->dev; | |
efbeccf1 | 656 | priv = netdev_priv(dev); |
1da177e4 | 657 | |
efbeccf1 SR |
658 | /* Reset our private host data, but not our MTU */ |
659 | netif_stop_queue(dev); | |
660 | ether1394_reset_priv(dev, 0); | |
1da177e4 LT |
661 | |
662 | list_for_each_entry(node, &priv->ip_node_list, list) { | |
efbeccf1 | 663 | node_info = node->ud->device.driver_data; |
1da177e4 LT |
664 | |
665 | spin_lock_irqsave(&node_info->pdg.lock, flags); | |
666 | ||
efbeccf1 | 667 | list_for_each_safe(lh, n, &node_info->pdg.list) |
1da177e4 | 668 | purge_partial_datagram(lh); |
1da177e4 LT |
669 | |
670 | INIT_LIST_HEAD(&(node_info->pdg.list)); | |
671 | node_info->pdg.sz = 0; | |
672 | ||
673 | spin_unlock_irqrestore(&node_info->pdg.lock, flags); | |
674 | } | |
675 | ||
efbeccf1 | 676 | netif_wake_queue(dev); |
1da177e4 LT |
677 | } |
678 | ||
679 | /****************************************** | |
680 | * HW Header net device functions | |
681 | ******************************************/ | |
682 | /* These functions have been adapted from net/ethernet/eth.c */ | |
683 | ||
1da177e4 LT |
684 | /* Create a fake MAC header for an arbitrary protocol layer. |
685 | * saddr=NULL means use device source address | |
686 | * daddr=NULL means leave destination address (eg unresolved arp). */ | |
687 | static int ether1394_header(struct sk_buff *skb, struct net_device *dev, | |
688 | unsigned short type, void *daddr, void *saddr, | |
689 | unsigned len) | |
690 | { | |
efbeccf1 SR |
691 | struct eth1394hdr *eth = |
692 | (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN); | |
1da177e4 LT |
693 | |
694 | eth->h_proto = htons(type); | |
695 | ||
efbeccf1 | 696 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) { |
1da177e4 | 697 | memset(eth->h_dest, 0, dev->addr_len); |
efbeccf1 | 698 | return dev->hard_header_len; |
1da177e4 LT |
699 | } |
700 | ||
701 | if (daddr) { | |
efbeccf1 | 702 | memcpy(eth->h_dest, daddr, dev->addr_len); |
1da177e4 LT |
703 | return dev->hard_header_len; |
704 | } | |
705 | ||
706 | return -dev->hard_header_len; | |
1da177e4 LT |
707 | } |
708 | ||
1da177e4 LT |
709 | /* Rebuild the faked MAC header. This is called after an ARP |
710 | * (or in future other address resolution) has completed on this | |
711 | * sk_buff. We now let ARP fill in the other fields. | |
712 | * | |
713 | * This routine CANNOT use cached dst->neigh! | |
714 | * Really, it is used only when dst->neigh is wrong. | |
715 | */ | |
716 | static int ether1394_rebuild_header(struct sk_buff *skb) | |
717 | { | |
718 | struct eth1394hdr *eth = (struct eth1394hdr *)skb->data; | |
719 | struct net_device *dev = skb->dev; | |
720 | ||
721 | switch (eth->h_proto) { | |
722 | ||
723 | #ifdef CONFIG_INET | |
724 | case __constant_htons(ETH_P_IP): | |
efbeccf1 | 725 | return arp_find((unsigned char *)ð->h_dest, skb); |
1da177e4 LT |
726 | #endif |
727 | default: | |
728 | ETH1394_PRINT(KERN_DEBUG, dev->name, | |
729 | "unable to resolve type %04x addresses.\n", | |
7136b807 | 730 | ntohs(eth->h_proto)); |
1da177e4 LT |
731 | break; |
732 | } | |
733 | ||
734 | return 0; | |
735 | } | |
736 | ||
737 | static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr) | |
738 | { | |
739 | struct net_device *dev = skb->dev; | |
efbeccf1 | 740 | |
1da177e4 LT |
741 | memcpy(haddr, dev->dev_addr, ETH1394_ALEN); |
742 | return ETH1394_ALEN; | |
743 | } | |
744 | ||
1da177e4 LT |
745 | static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh) |
746 | { | |
747 | unsigned short type = hh->hh_type; | |
1da177e4 | 748 | struct net_device *dev = neigh->dev; |
efbeccf1 SR |
749 | struct eth1394hdr *eth = |
750 | (struct eth1394hdr *)((u8 *)hh->hh_data + 16 - ETH1394_HLEN); | |
1da177e4 | 751 | |
7136b807 | 752 | if (type == htons(ETH_P_802_3)) |
1da177e4 | 753 | return -1; |
1da177e4 LT |
754 | |
755 | eth->h_proto = type; | |
756 | memcpy(eth->h_dest, neigh->ha, dev->addr_len); | |
757 | ||
758 | hh->hh_len = ETH1394_HLEN; | |
759 | return 0; | |
760 | } | |
761 | ||
762 | /* Called by Address Resolution module to notify changes in address. */ | |
763 | static void ether1394_header_cache_update(struct hh_cache *hh, | |
764 | struct net_device *dev, | |
765 | unsigned char * haddr) | |
766 | { | |
efbeccf1 | 767 | memcpy((u8 *)hh->hh_data + 16 - ETH1394_HLEN, haddr, dev->addr_len); |
1da177e4 LT |
768 | } |
769 | ||
770 | static int ether1394_mac_addr(struct net_device *dev, void *p) | |
771 | { | |
772 | if (netif_running(dev)) | |
773 | return -EBUSY; | |
774 | ||
775 | /* Not going to allow setting the MAC address, we really need to use | |
776 | * the real one supplied by the hardware */ | |
777 | return -EINVAL; | |
efbeccf1 | 778 | } |
1da177e4 LT |
779 | |
780 | /****************************************** | |
781 | * Datagram reception code | |
782 | ******************************************/ | |
783 | ||
784 | /* Copied from net/ethernet/eth.c */ | |
e00f04a7 | 785 | static u16 ether1394_type_trans(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
786 | { |
787 | struct eth1394hdr *eth; | |
788 | unsigned char *rawp; | |
789 | ||
459a98ed | 790 | skb_reset_mac_header(skb); |
efbeccf1 | 791 | skb_pull(skb, ETH1394_HLEN); |
1da177e4 LT |
792 | eth = eth1394_hdr(skb); |
793 | ||
794 | if (*eth->h_dest & 1) { | |
efbeccf1 | 795 | if (memcmp(eth->h_dest, dev->broadcast, dev->addr_len) == 0) |
1da177e4 LT |
796 | skb->pkt_type = PACKET_BROADCAST; |
797 | #if 0 | |
798 | else | |
799 | skb->pkt_type = PACKET_MULTICAST; | |
800 | #endif | |
801 | } else { | |
802 | if (memcmp(eth->h_dest, dev->dev_addr, dev->addr_len)) | |
803 | skb->pkt_type = PACKET_OTHERHOST; | |
efbeccf1 | 804 | } |
1da177e4 | 805 | |
efbeccf1 | 806 | if (ntohs(eth->h_proto) >= 1536) |
1da177e4 LT |
807 | return eth->h_proto; |
808 | ||
809 | rawp = skb->data; | |
810 | ||
efbeccf1 SR |
811 | if (*(unsigned short *)rawp == 0xFFFF) |
812 | return htons(ETH_P_802_3); | |
1da177e4 | 813 | |
efbeccf1 | 814 | return htons(ETH_P_802_2); |
1da177e4 LT |
815 | } |
816 | ||
817 | /* Parse an encapsulated IP1394 header into an ethernet frame packet. | |
818 | * We also perform ARP translation here, if need be. */ | |
e00f04a7 SR |
819 | static u16 ether1394_parse_encap(struct sk_buff *skb, struct net_device *dev, |
820 | nodeid_t srcid, nodeid_t destid, | |
821 | u16 ether_type) | |
1da177e4 LT |
822 | { |
823 | struct eth1394_priv *priv = netdev_priv(dev); | |
824 | u64 dest_hw; | |
825 | unsigned short ret = 0; | |
826 | ||
efbeccf1 | 827 | /* Setup our hw addresses. We use these to build the ethernet header. */ |
1da177e4 LT |
828 | if (destid == (LOCAL_BUS | ALL_NODES)) |
829 | dest_hw = ~0ULL; /* broadcast */ | |
830 | else | |
efbeccf1 | 831 | dest_hw = cpu_to_be64((u64)priv->host->csr.guid_hi << 32 | |
1da177e4 LT |
832 | priv->host->csr.guid_lo); |
833 | ||
834 | /* If this is an ARP packet, convert it. First, we want to make | |
835 | * use of some of the fields, since they tell us a little bit | |
836 | * about the sending machine. */ | |
7136b807 | 837 | if (ether_type == htons(ETH_P_ARP)) { |
efbeccf1 | 838 | struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data; |
1da177e4 LT |
839 | struct arphdr *arp = (struct arphdr *)skb->data; |
840 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
841 | u64 fifo_addr = (u64)ntohs(arp1394->fifo_hi) << 32 | | |
efbeccf1 | 842 | ntohl(arp1394->fifo_lo); |
1da177e4 LT |
843 | u8 max_rec = min(priv->host->csr.max_rec, |
844 | (u8)(arp1394->max_rec)); | |
845 | int sspd = arp1394->sspd; | |
846 | u16 maxpayload; | |
847 | struct eth1394_node_ref *node; | |
848 | struct eth1394_node_info *node_info; | |
c20e3945 | 849 | __be64 guid; |
1da177e4 LT |
850 | |
851 | /* Sanity check. MacOSX seems to be sending us 131 in this | |
852 | * field (atleast on my Panther G5). Not sure why. */ | |
853 | if (sspd > 5 || sspd < 0) | |
854 | sspd = 0; | |
855 | ||
efbeccf1 SR |
856 | maxpayload = min(eth1394_speedto_maxpayload[sspd], |
857 | (u16)(1 << (max_rec + 1))); | |
1da177e4 | 858 | |
c20e3945 | 859 | guid = get_unaligned(&arp1394->s_uniq_id); |
1da177e4 | 860 | node = eth1394_find_node_guid(&priv->ip_node_list, |
c20e3945 | 861 | be64_to_cpu(guid)); |
efbeccf1 | 862 | if (!node) |
1da177e4 | 863 | return 0; |
1da177e4 | 864 | |
efbeccf1 SR |
865 | node_info = |
866 | (struct eth1394_node_info *)node->ud->device.driver_data; | |
1da177e4 LT |
867 | |
868 | /* Update our speed/payload/fifo_offset table */ | |
869 | node_info->maxpayload = maxpayload; | |
870 | node_info->sspd = sspd; | |
871 | node_info->fifo = fifo_addr; | |
872 | ||
873 | /* Now that we're done with the 1394 specific stuff, we'll | |
874 | * need to alter some of the data. Believe it or not, all | |
875 | * that needs to be done is sender_IP_address needs to be | |
876 | * moved, the destination hardware address get stuffed | |
877 | * in and the hardware address length set to 8. | |
878 | * | |
879 | * IMPORTANT: The code below overwrites 1394 specific data | |
880 | * needed above so keep the munging of the data for the | |
881 | * higher level IP stack last. */ | |
882 | ||
883 | arp->ar_hln = 8; | |
884 | arp_ptr += arp->ar_hln; /* skip over sender unique id */ | |
efbeccf1 | 885 | *(u32 *)arp_ptr = arp1394->sip; /* move sender IP addr */ |
1da177e4 LT |
886 | arp_ptr += arp->ar_pln; /* skip over sender IP addr */ |
887 | ||
02f4213f | 888 | if (arp->ar_op == htons(ARPOP_REQUEST)) |
c20e3945 | 889 | memset(arp_ptr, 0, sizeof(u64)); |
1da177e4 | 890 | else |
c20e3945 | 891 | memcpy(arp_ptr, dev->dev_addr, sizeof(u64)); |
1da177e4 LT |
892 | } |
893 | ||
894 | /* Now add the ethernet header. */ | |
7136b807 BC |
895 | if (dev->hard_header(skb, dev, ntohs(ether_type), &dest_hw, NULL, |
896 | skb->len) >= 0) | |
1da177e4 LT |
897 | ret = ether1394_type_trans(skb, dev); |
898 | ||
899 | return ret; | |
900 | } | |
901 | ||
e00f04a7 | 902 | static int fragment_overlap(struct list_head *frag_list, int offset, int len) |
1da177e4 LT |
903 | { |
904 | struct fragment_info *fi; | |
905 | ||
906 | list_for_each_entry(fi, frag_list, list) { | |
907 | if ( ! ((offset > (fi->offset + fi->len - 1)) || | |
908 | ((offset + len - 1) < fi->offset))) | |
909 | return 1; | |
910 | } | |
911 | return 0; | |
912 | } | |
913 | ||
e00f04a7 | 914 | static struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl) |
1da177e4 LT |
915 | { |
916 | struct partial_datagram *pd; | |
917 | ||
efbeccf1 | 918 | list_for_each_entry(pd, pdgl, list) |
1da177e4 LT |
919 | if (pd->dgl == dgl) |
920 | return &pd->list; | |
efbeccf1 | 921 | |
1da177e4 LT |
922 | return NULL; |
923 | } | |
924 | ||
925 | /* Assumes that new fragment does not overlap any existing fragments */ | |
e00f04a7 | 926 | static int new_fragment(struct list_head *frag_info, int offset, int len) |
1da177e4 LT |
927 | { |
928 | struct list_head *lh; | |
929 | struct fragment_info *fi, *fi2, *new; | |
930 | ||
931 | list_for_each(lh, frag_info) { | |
932 | fi = list_entry(lh, struct fragment_info, list); | |
efbeccf1 | 933 | if (fi->offset + fi->len == offset) { |
1da177e4 LT |
934 | /* The new fragment can be tacked on to the end */ |
935 | fi->len += len; | |
936 | /* Did the new fragment plug a hole? */ | |
937 | fi2 = list_entry(lh->next, struct fragment_info, list); | |
efbeccf1 | 938 | if (fi->offset + fi->len == fi2->offset) { |
1da177e4 LT |
939 | /* glue fragments together */ |
940 | fi->len += fi2->len; | |
941 | list_del(lh->next); | |
942 | kfree(fi2); | |
943 | } | |
944 | return 0; | |
efbeccf1 | 945 | } else if (offset + len == fi->offset) { |
1da177e4 LT |
946 | /* The new fragment can be tacked on to the beginning */ |
947 | fi->offset = offset; | |
948 | fi->len += len; | |
949 | /* Did the new fragment plug a hole? */ | |
950 | fi2 = list_entry(lh->prev, struct fragment_info, list); | |
efbeccf1 | 951 | if (fi2->offset + fi2->len == fi->offset) { |
1da177e4 LT |
952 | /* glue fragments together */ |
953 | fi2->len += fi->len; | |
954 | list_del(lh); | |
955 | kfree(fi); | |
956 | } | |
957 | return 0; | |
efbeccf1 | 958 | } else if (offset > fi->offset + fi->len) { |
1da177e4 | 959 | break; |
efbeccf1 | 960 | } else if (offset + len < fi->offset) { |
1da177e4 LT |
961 | lh = lh->prev; |
962 | break; | |
963 | } | |
964 | } | |
965 | ||
8551158a | 966 | new = kmalloc(sizeof(*new), GFP_ATOMIC); |
1da177e4 LT |
967 | if (!new) |
968 | return -ENOMEM; | |
969 | ||
970 | new->offset = offset; | |
971 | new->len = len; | |
972 | ||
973 | list_add(&new->list, lh); | |
1da177e4 LT |
974 | return 0; |
975 | } | |
976 | ||
e00f04a7 SR |
977 | static int new_partial_datagram(struct net_device *dev, struct list_head *pdgl, |
978 | int dgl, int dg_size, char *frag_buf, | |
979 | int frag_off, int frag_len) | |
1da177e4 LT |
980 | { |
981 | struct partial_datagram *new; | |
982 | ||
8551158a | 983 | new = kmalloc(sizeof(*new), GFP_ATOMIC); |
1da177e4 LT |
984 | if (!new) |
985 | return -ENOMEM; | |
986 | ||
987 | INIT_LIST_HEAD(&new->frag_info); | |
988 | ||
989 | if (new_fragment(&new->frag_info, frag_off, frag_len) < 0) { | |
990 | kfree(new); | |
991 | return -ENOMEM; | |
992 | } | |
993 | ||
994 | new->dgl = dgl; | |
995 | new->dg_size = dg_size; | |
996 | ||
997 | new->skb = dev_alloc_skb(dg_size + dev->hard_header_len + 15); | |
998 | if (!new->skb) { | |
999 | struct fragment_info *fi = list_entry(new->frag_info.next, | |
1000 | struct fragment_info, | |
1001 | list); | |
1002 | kfree(fi); | |
1003 | kfree(new); | |
1004 | return -ENOMEM; | |
1005 | } | |
1006 | ||
1007 | skb_reserve(new->skb, (dev->hard_header_len + 15) & ~15); | |
1008 | new->pbuf = skb_put(new->skb, dg_size); | |
1009 | memcpy(new->pbuf + frag_off, frag_buf, frag_len); | |
1010 | ||
1011 | list_add(&new->list, pdgl); | |
1da177e4 LT |
1012 | return 0; |
1013 | } | |
1014 | ||
e00f04a7 SR |
1015 | static int update_partial_datagram(struct list_head *pdgl, struct list_head *lh, |
1016 | char *frag_buf, int frag_off, int frag_len) | |
1da177e4 | 1017 | { |
efbeccf1 SR |
1018 | struct partial_datagram *pd = |
1019 | list_entry(lh, struct partial_datagram, list); | |
1da177e4 | 1020 | |
efbeccf1 | 1021 | if (new_fragment(&pd->frag_info, frag_off, frag_len) < 0) |
1da177e4 | 1022 | return -ENOMEM; |
1da177e4 LT |
1023 | |
1024 | memcpy(pd->pbuf + frag_off, frag_buf, frag_len); | |
1025 | ||
1026 | /* Move list entry to beginnig of list so that oldest partial | |
1027 | * datagrams percolate to the end of the list */ | |
179e0917 | 1028 | list_move(lh, pdgl); |
1da177e4 LT |
1029 | return 0; |
1030 | } | |
1031 | ||
e00f04a7 | 1032 | static int is_datagram_complete(struct list_head *lh, int dg_size) |
1da177e4 | 1033 | { |
e00f04a7 SR |
1034 | struct partial_datagram *pd; |
1035 | struct fragment_info *fi; | |
1036 | ||
1037 | pd = list_entry(lh, struct partial_datagram, list); | |
1038 | fi = list_entry(pd->frag_info.next, struct fragment_info, list); | |
1da177e4 LT |
1039 | |
1040 | return (fi->len == dg_size); | |
1041 | } | |
1042 | ||
1043 | /* Packet reception. We convert the IP1394 encapsulation header to an | |
1044 | * ethernet header, and fill it with some of our other fields. This is | |
1045 | * an incoming packet from the 1394 bus. */ | |
1046 | static int ether1394_data_handler(struct net_device *dev, int srcid, int destid, | |
1047 | char *buf, int len) | |
1048 | { | |
1049 | struct sk_buff *skb; | |
1050 | unsigned long flags; | |
1051 | struct eth1394_priv *priv = netdev_priv(dev); | |
1052 | union eth1394_hdr *hdr = (union eth1394_hdr *)buf; | |
1053 | u16 ether_type = 0; /* initialized to clear warning */ | |
1054 | int hdr_len; | |
1055 | struct unit_directory *ud = priv->ud_list[NODEID_TO_NODE(srcid)]; | |
1056 | struct eth1394_node_info *node_info; | |
1057 | ||
1058 | if (!ud) { | |
1059 | struct eth1394_node_ref *node; | |
1060 | node = eth1394_find_node_nodeid(&priv->ip_node_list, srcid); | |
1061 | if (!node) { | |
1062 | HPSB_PRINT(KERN_ERR, "ether1394 rx: sender nodeid " | |
1063 | "lookup failure: " NODE_BUS_FMT, | |
1064 | NODE_BUS_ARGS(priv->host, srcid)); | |
1065 | priv->stats.rx_dropped++; | |
1066 | return -1; | |
1067 | } | |
1068 | ud = node->ud; | |
1069 | ||
1070 | priv->ud_list[NODEID_TO_NODE(srcid)] = ud; | |
1071 | } | |
1072 | ||
efbeccf1 | 1073 | node_info = (struct eth1394_node_info *)ud->device.driver_data; |
1da177e4 LT |
1074 | |
1075 | /* First, did we receive a fragmented or unfragmented datagram? */ | |
1076 | hdr->words.word1 = ntohs(hdr->words.word1); | |
1077 | ||
1078 | hdr_len = hdr_type_len[hdr->common.lf]; | |
1079 | ||
1080 | if (hdr->common.lf == ETH1394_HDR_LF_UF) { | |
1081 | /* An unfragmented datagram has been received by the ieee1394 | |
1082 | * bus. Build an skbuff around it so we can pass it to the | |
1083 | * high level network layer. */ | |
1084 | ||
1085 | skb = dev_alloc_skb(len + dev->hard_header_len + 15); | |
1086 | if (!skb) { | |
1087 | HPSB_PRINT (KERN_ERR, "ether1394 rx: low on mem\n"); | |
1088 | priv->stats.rx_dropped++; | |
1089 | return -1; | |
1090 | } | |
1091 | skb_reserve(skb, (dev->hard_header_len + 15) & ~15); | |
efbeccf1 SR |
1092 | memcpy(skb_put(skb, len - hdr_len), buf + hdr_len, |
1093 | len - hdr_len); | |
1da177e4 LT |
1094 | ether_type = hdr->uf.ether_type; |
1095 | } else { | |
1096 | /* A datagram fragment has been received, now the fun begins. */ | |
1097 | ||
1098 | struct list_head *pdgl, *lh; | |
1099 | struct partial_datagram *pd; | |
1100 | int fg_off; | |
1101 | int fg_len = len - hdr_len; | |
1102 | int dg_size; | |
1103 | int dgl; | |
1104 | int retval; | |
1105 | struct pdg_list *pdg = &(node_info->pdg); | |
1106 | ||
1107 | hdr->words.word3 = ntohs(hdr->words.word3); | |
1108 | /* The 4th header word is reserved so no need to do ntohs() */ | |
1109 | ||
1110 | if (hdr->common.lf == ETH1394_HDR_LF_FF) { | |
1111 | ether_type = hdr->ff.ether_type; | |
1112 | dgl = hdr->ff.dgl; | |
1113 | dg_size = hdr->ff.dg_size + 1; | |
1114 | fg_off = 0; | |
1115 | } else { | |
1116 | hdr->words.word2 = ntohs(hdr->words.word2); | |
1117 | dgl = hdr->sf.dgl; | |
1118 | dg_size = hdr->sf.dg_size + 1; | |
1119 | fg_off = hdr->sf.fg_off; | |
1120 | } | |
1121 | spin_lock_irqsave(&pdg->lock, flags); | |
1122 | ||
1123 | pdgl = &(pdg->list); | |
1124 | lh = find_partial_datagram(pdgl, dgl); | |
1125 | ||
1126 | if (lh == NULL) { | |
1127 | while (pdg->sz >= max_partial_datagrams) { | |
1128 | /* remove the oldest */ | |
1129 | purge_partial_datagram(pdgl->prev); | |
1130 | pdg->sz--; | |
1131 | } | |
1132 | ||
1133 | retval = new_partial_datagram(dev, pdgl, dgl, dg_size, | |
1134 | buf + hdr_len, fg_off, | |
1135 | fg_len); | |
1136 | if (retval < 0) { | |
1137 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1138 | goto bad_proto; | |
1139 | } | |
1140 | pdg->sz++; | |
1141 | lh = find_partial_datagram(pdgl, dgl); | |
1142 | } else { | |
1143 | struct partial_datagram *pd; | |
1144 | ||
1145 | pd = list_entry(lh, struct partial_datagram, list); | |
1146 | ||
1147 | if (fragment_overlap(&pd->frag_info, fg_off, fg_len)) { | |
1148 | /* Overlapping fragments, obliterate old | |
1149 | * datagram and start new one. */ | |
1150 | purge_partial_datagram(lh); | |
1151 | retval = new_partial_datagram(dev, pdgl, dgl, | |
1152 | dg_size, | |
1153 | buf + hdr_len, | |
1154 | fg_off, fg_len); | |
1155 | if (retval < 0) { | |
1156 | pdg->sz--; | |
1157 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1158 | goto bad_proto; | |
1159 | } | |
1160 | } else { | |
1161 | retval = update_partial_datagram(pdgl, lh, | |
1162 | buf + hdr_len, | |
1163 | fg_off, fg_len); | |
1164 | if (retval < 0) { | |
1165 | /* Couldn't save off fragment anyway | |
1166 | * so might as well obliterate the | |
1167 | * datagram now. */ | |
1168 | purge_partial_datagram(lh); | |
1169 | pdg->sz--; | |
1170 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1171 | goto bad_proto; | |
1172 | } | |
1173 | } /* fragment overlap */ | |
1174 | } /* new datagram or add to existing one */ | |
1175 | ||
1176 | pd = list_entry(lh, struct partial_datagram, list); | |
1177 | ||
efbeccf1 | 1178 | if (hdr->common.lf == ETH1394_HDR_LF_FF) |
1da177e4 | 1179 | pd->ether_type = ether_type; |
1da177e4 LT |
1180 | |
1181 | if (is_datagram_complete(lh, dg_size)) { | |
1182 | ether_type = pd->ether_type; | |
1183 | pdg->sz--; | |
1184 | skb = skb_get(pd->skb); | |
1185 | purge_partial_datagram(lh); | |
1186 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1187 | } else { | |
1188 | /* Datagram is not complete, we're done for the | |
1189 | * moment. */ | |
1190 | spin_unlock_irqrestore(&pdg->lock, flags); | |
1191 | return 0; | |
1192 | } | |
1193 | } /* unframgented datagram or fragmented one */ | |
1194 | ||
1195 | /* Write metadata, and then pass to the receive level */ | |
1196 | skb->dev = dev; | |
1197 | skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */ | |
1198 | ||
1199 | /* Parse the encapsulation header. This actually does the job of | |
1200 | * converting to an ethernet frame header, aswell as arp | |
1201 | * conversion if needed. ARP conversion is easier in this | |
1202 | * direction, since we are using ethernet as our backend. */ | |
1203 | skb->protocol = ether1394_parse_encap(skb, dev, srcid, destid, | |
1204 | ether_type); | |
1205 | ||
1da177e4 | 1206 | spin_lock_irqsave(&priv->lock, flags); |
efbeccf1 | 1207 | |
1da177e4 LT |
1208 | if (!skb->protocol) { |
1209 | priv->stats.rx_errors++; | |
1210 | priv->stats.rx_dropped++; | |
1211 | dev_kfree_skb_any(skb); | |
1212 | goto bad_proto; | |
1213 | } | |
1214 | ||
1215 | if (netif_rx(skb) == NET_RX_DROP) { | |
1216 | priv->stats.rx_errors++; | |
1217 | priv->stats.rx_dropped++; | |
1218 | goto bad_proto; | |
1219 | } | |
1220 | ||
1221 | /* Statistics */ | |
1222 | priv->stats.rx_packets++; | |
1223 | priv->stats.rx_bytes += skb->len; | |
1224 | ||
1225 | bad_proto: | |
1226 | if (netif_queue_stopped(dev)) | |
1227 | netif_wake_queue(dev); | |
1228 | spin_unlock_irqrestore(&priv->lock, flags); | |
1229 | ||
1230 | dev->last_rx = jiffies; | |
1231 | ||
1232 | return 0; | |
1233 | } | |
1234 | ||
1235 | static int ether1394_write(struct hpsb_host *host, int srcid, int destid, | |
1236 | quadlet_t *data, u64 addr, size_t len, u16 flags) | |
1237 | { | |
1238 | struct eth1394_host_info *hi; | |
1239 | ||
1240 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); | |
1241 | if (hi == NULL) { | |
1242 | ETH1394_PRINT_G(KERN_ERR, "Could not find net device for host %s\n", | |
1243 | host->driver->name); | |
1244 | return RCODE_ADDRESS_ERROR; | |
1245 | } | |
1246 | ||
1247 | if (ether1394_data_handler(hi->dev, srcid, destid, (char*)data, len)) | |
1248 | return RCODE_ADDRESS_ERROR; | |
1249 | else | |
1250 | return RCODE_COMPLETE; | |
1251 | } | |
1252 | ||
1253 | static void ether1394_iso(struct hpsb_iso *iso) | |
1254 | { | |
1255 | quadlet_t *data; | |
1256 | char *buf; | |
1257 | struct eth1394_host_info *hi; | |
1258 | struct net_device *dev; | |
1259 | struct eth1394_priv *priv; | |
1260 | unsigned int len; | |
1261 | u32 specifier_id; | |
1262 | u16 source_id; | |
1263 | int i; | |
1264 | int nready; | |
1265 | ||
1266 | hi = hpsb_get_hostinfo(ð1394_highlevel, iso->host); | |
1267 | if (hi == NULL) { | |
1268 | ETH1394_PRINT_G(KERN_ERR, "Could not find net device for host %s\n", | |
1269 | iso->host->driver->name); | |
1270 | return; | |
1271 | } | |
1272 | ||
1273 | dev = hi->dev; | |
1274 | ||
1275 | nready = hpsb_iso_n_ready(iso); | |
1276 | for (i = 0; i < nready; i++) { | |
1277 | struct hpsb_iso_packet_info *info = | |
1278 | &iso->infos[(iso->first_packet + i) % iso->buf_packets]; | |
efbeccf1 | 1279 | data = (quadlet_t *)(iso->data_buf.kvirt + info->offset); |
1da177e4 LT |
1280 | |
1281 | /* skip over GASP header */ | |
1282 | buf = (char *)data + 8; | |
1283 | len = info->len - 8; | |
1284 | ||
efbeccf1 SR |
1285 | specifier_id = (be32_to_cpu(data[0]) & 0xffff) << 8 | |
1286 | (be32_to_cpu(data[1]) & 0xff000000) >> 24; | |
1da177e4 LT |
1287 | source_id = be32_to_cpu(data[0]) >> 16; |
1288 | ||
1289 | priv = netdev_priv(dev); | |
1290 | ||
efbeccf1 SR |
1291 | if (info->channel != (iso->host->csr.broadcast_channel & 0x3f) |
1292 | || specifier_id != ETHER1394_GASP_SPECIFIER_ID) { | |
1da177e4 LT |
1293 | /* This packet is not for us */ |
1294 | continue; | |
1295 | } | |
1296 | ether1394_data_handler(dev, source_id, LOCAL_BUS | ALL_NODES, | |
1297 | buf, len); | |
1298 | } | |
1299 | ||
1300 | hpsb_iso_recv_release_packets(iso, i); | |
1301 | ||
1302 | dev->last_rx = jiffies; | |
1303 | } | |
1304 | ||
1305 | /****************************************** | |
1306 | * Datagram transmission code | |
1307 | ******************************************/ | |
1308 | ||
1309 | /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire | |
1310 | * arphdr) is the same format as the ip1394 header, so they overlap. The rest | |
1311 | * needs to be munged a bit. The remainder of the arphdr is formatted based | |
1312 | * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to | |
1313 | * judge. | |
1314 | * | |
1315 | * Now that the EUI is used for the hardware address all we need to do to make | |
1316 | * this work for 1394 is to insert 2 quadlets that contain max_rec size, | |
1317 | * speed, and unicast FIFO address information between the sender_unique_id | |
1318 | * and the IP addresses. | |
1319 | */ | |
e00f04a7 SR |
1320 | static void ether1394_arp_to_1394arp(struct sk_buff *skb, |
1321 | struct net_device *dev) | |
1da177e4 LT |
1322 | { |
1323 | struct eth1394_priv *priv = netdev_priv(dev); | |
1da177e4 LT |
1324 | struct arphdr *arp = (struct arphdr *)skb->data; |
1325 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); | |
1326 | struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data; | |
1327 | ||
1da177e4 LT |
1328 | arp1394->hw_addr_len = 16; |
1329 | arp1394->sip = *(u32*)(arp_ptr + ETH1394_ALEN); | |
1330 | arp1394->max_rec = priv->host->csr.max_rec; | |
1331 | arp1394->sspd = priv->host->csr.lnk_spd; | |
efbeccf1 SR |
1332 | arp1394->fifo_hi = htons(priv->local_fifo >> 32); |
1333 | arp1394->fifo_lo = htonl(priv->local_fifo & ~0x0); | |
1da177e4 LT |
1334 | } |
1335 | ||
1336 | /* We need to encapsulate the standard header with our own. We use the | |
1337 | * ethernet header's proto for our own. */ | |
e00f04a7 SR |
1338 | static unsigned int ether1394_encapsulate_prep(unsigned int max_payload, |
1339 | __be16 proto, | |
1340 | union eth1394_hdr *hdr, | |
1341 | u16 dg_size, u16 dgl) | |
1da177e4 | 1342 | { |
efbeccf1 SR |
1343 | unsigned int adj_max_payload = |
1344 | max_payload - hdr_type_len[ETH1394_HDR_LF_UF]; | |
1da177e4 LT |
1345 | |
1346 | /* Does it all fit in one packet? */ | |
1347 | if (dg_size <= adj_max_payload) { | |
1348 | hdr->uf.lf = ETH1394_HDR_LF_UF; | |
1349 | hdr->uf.ether_type = proto; | |
1350 | } else { | |
1351 | hdr->ff.lf = ETH1394_HDR_LF_FF; | |
1352 | hdr->ff.ether_type = proto; | |
1353 | hdr->ff.dg_size = dg_size - 1; | |
1354 | hdr->ff.dgl = dgl; | |
1355 | adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_FF]; | |
1356 | } | |
efbeccf1 | 1357 | return (dg_size + adj_max_payload - 1) / adj_max_payload; |
1da177e4 LT |
1358 | } |
1359 | ||
e00f04a7 SR |
1360 | static unsigned int ether1394_encapsulate(struct sk_buff *skb, |
1361 | unsigned int max_payload, | |
1362 | union eth1394_hdr *hdr) | |
1da177e4 LT |
1363 | { |
1364 | union eth1394_hdr *bufhdr; | |
1365 | int ftype = hdr->common.lf; | |
1366 | int hdrsz = hdr_type_len[ftype]; | |
1367 | unsigned int adj_max_payload = max_payload - hdrsz; | |
1368 | ||
efbeccf1 | 1369 | switch (ftype) { |
1da177e4 LT |
1370 | case ETH1394_HDR_LF_UF: |
1371 | bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz); | |
1372 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1373 | bufhdr->words.word2 = hdr->words.word2; | |
1374 | break; | |
1375 | ||
1376 | case ETH1394_HDR_LF_FF: | |
1377 | bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz); | |
1378 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1379 | bufhdr->words.word2 = hdr->words.word2; | |
1380 | bufhdr->words.word3 = htons(hdr->words.word3); | |
1381 | bufhdr->words.word4 = 0; | |
1382 | ||
1383 | /* Set frag type here for future interior fragments */ | |
1384 | hdr->common.lf = ETH1394_HDR_LF_IF; | |
1385 | hdr->sf.fg_off = 0; | |
1386 | break; | |
1387 | ||
1388 | default: | |
1389 | hdr->sf.fg_off += adj_max_payload; | |
1390 | bufhdr = (union eth1394_hdr *)skb_pull(skb, adj_max_payload); | |
1391 | if (max_payload >= skb->len) | |
1392 | hdr->common.lf = ETH1394_HDR_LF_LF; | |
1393 | bufhdr->words.word1 = htons(hdr->words.word1); | |
1394 | bufhdr->words.word2 = htons(hdr->words.word2); | |
1395 | bufhdr->words.word3 = htons(hdr->words.word3); | |
1396 | bufhdr->words.word4 = 0; | |
1397 | } | |
1da177e4 LT |
1398 | return min(max_payload, skb->len); |
1399 | } | |
1400 | ||
e00f04a7 | 1401 | static struct hpsb_packet *ether1394_alloc_common_packet(struct hpsb_host *host) |
1da177e4 LT |
1402 | { |
1403 | struct hpsb_packet *p; | |
1404 | ||
1405 | p = hpsb_alloc_packet(0); | |
1406 | if (p) { | |
1407 | p->host = host; | |
1408 | p->generation = get_hpsb_generation(host); | |
1409 | p->type = hpsb_async; | |
1410 | } | |
1411 | return p; | |
1412 | } | |
1413 | ||
e00f04a7 SR |
1414 | static int ether1394_prep_write_packet(struct hpsb_packet *p, |
1415 | struct hpsb_host *host, nodeid_t node, | |
efbeccf1 | 1416 | u64 addr, void *data, int tx_len) |
1da177e4 LT |
1417 | { |
1418 | p->node_id = node; | |
1419 | p->data = NULL; | |
1420 | ||
1421 | p->tcode = TCODE_WRITEB; | |
efbeccf1 | 1422 | p->header[1] = host->node_id << 16 | addr >> 32; |
1da177e4 LT |
1423 | p->header[2] = addr & 0xffffffff; |
1424 | ||
1425 | p->header_size = 16; | |
1426 | p->expect_response = 1; | |
1427 | ||
1428 | if (hpsb_get_tlabel(p)) { | |
1429 | ETH1394_PRINT_G(KERN_ERR, "No more tlabels left while sending " | |
1430 | "to node " NODE_BUS_FMT "\n", NODE_BUS_ARGS(host, node)); | |
1431 | return -1; | |
1432 | } | |
efbeccf1 SR |
1433 | p->header[0] = |
1434 | p->node_id << 16 | p->tlabel << 10 | 1 << 8 | TCODE_WRITEB << 4; | |
1da177e4 LT |
1435 | |
1436 | p->header[3] = tx_len << 16; | |
1437 | p->data_size = (tx_len + 3) & ~3; | |
efbeccf1 | 1438 | p->data = data; |
1da177e4 LT |
1439 | |
1440 | return 0; | |
1441 | } | |
1442 | ||
e00f04a7 SR |
1443 | static void ether1394_prep_gasp_packet(struct hpsb_packet *p, |
1444 | struct eth1394_priv *priv, | |
1445 | struct sk_buff *skb, int length) | |
1da177e4 LT |
1446 | { |
1447 | p->header_size = 4; | |
1448 | p->tcode = TCODE_STREAM_DATA; | |
1449 | ||
efbeccf1 SR |
1450 | p->header[0] = length << 16 | 3 << 14 | priv->broadcast_channel << 8 | |
1451 | TCODE_STREAM_DATA << 4; | |
1da177e4 | 1452 | p->data_size = length; |
efbeccf1 SR |
1453 | p->data = (quadlet_t *)skb->data - 2; |
1454 | p->data[0] = cpu_to_be32(priv->host->node_id << 16 | | |
1da177e4 | 1455 | ETHER1394_GASP_SPECIFIER_ID_HI); |
efbeccf1 | 1456 | p->data[1] = cpu_to_be32(ETHER1394_GASP_SPECIFIER_ID_LO << 24 | |
7136b807 | 1457 | ETHER1394_GASP_VERSION); |
1da177e4 LT |
1458 | |
1459 | /* Setting the node id to ALL_NODES (not LOCAL_BUS | ALL_NODES) | |
1460 | * prevents hpsb_send_packet() from setting the speed to an arbitrary | |
1461 | * value based on packet->node_id if packet->node_id is not set. */ | |
1462 | p->node_id = ALL_NODES; | |
1463 | p->speed_code = priv->bc_sspd; | |
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) | |
1482 | return -1; | |
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); | |
1493 | return -1; | |
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); | |
1502 | return -1; | |
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) { | |
1545 | int tx_len; | |
1546 | ||
1547 | /* Add the encapsulation header to the fragment */ | |
1548 | tx_len = ether1394_encapsulate(ptask->skb, ptask->max_payload, | |
1549 | &ptask->hdr); | |
1550 | if (ether1394_send_packet(ptask, tx_len)) | |
1551 | ether1394_dg_complete(ptask, 1); | |
1552 | } else { | |
1553 | ether1394_dg_complete(ptask, fail); | |
1554 | } | |
1555 | } | |
1556 | ||
1da177e4 | 1557 | /* Transmit a packet (called by kernel) */ |
efbeccf1 | 1558 | static int ether1394_tx(struct sk_buff *skb, struct net_device *dev) |
1da177e4 | 1559 | { |
b4e3ca1a | 1560 | gfp_t kmflags = in_interrupt() ? GFP_ATOMIC : GFP_KERNEL; |
1da177e4 LT |
1561 | struct eth1394hdr *eth; |
1562 | struct eth1394_priv *priv = netdev_priv(dev); | |
02f4213f | 1563 | __be16 proto; |
1da177e4 LT |
1564 | unsigned long flags; |
1565 | nodeid_t dest_node; | |
1566 | eth1394_tx_type tx_type; | |
1567 | int ret = 0; | |
1568 | unsigned int tx_len; | |
1569 | unsigned int max_payload; | |
1570 | u16 dg_size; | |
1571 | u16 dgl; | |
1572 | struct packet_task *ptask; | |
1573 | struct eth1394_node_ref *node; | |
1574 | struct eth1394_node_info *node_info = NULL; | |
1575 | ||
1576 | ptask = kmem_cache_alloc(packet_task_cache, kmflags); | |
1577 | if (ptask == NULL) { | |
1578 | ret = -ENOMEM; | |
1579 | goto fail; | |
1580 | } | |
1581 | ||
1582 | /* XXX Ignore this for now. Noticed that when MacOSX is the IRM, | |
1583 | * it does not set our validity bit. We need to compensate for | |
1584 | * that somewhere else, but not in eth1394. */ | |
1585 | #if 0 | |
1586 | if ((priv->host->csr.broadcast_channel & 0xc0000000) != 0xc0000000) { | |
1587 | ret = -EAGAIN; | |
1588 | goto fail; | |
1589 | } | |
1590 | #endif | |
1591 | ||
efbeccf1 SR |
1592 | skb = skb_share_check(skb, kmflags); |
1593 | if (!skb) { | |
1da177e4 LT |
1594 | ret = -ENOMEM; |
1595 | goto fail; | |
1596 | } | |
1597 | ||
1598 | /* Get rid of the fake eth1394 header, but save a pointer */ | |
efbeccf1 | 1599 | eth = (struct eth1394hdr *)skb->data; |
1da177e4 LT |
1600 | skb_pull(skb, ETH1394_HLEN); |
1601 | ||
1602 | proto = eth->h_proto; | |
1603 | dg_size = skb->len; | |
1604 | ||
1605 | /* Set the transmission type for the packet. ARP packets and IP | |
1606 | * broadcast packets are sent via GASP. */ | |
1607 | if (memcmp(eth->h_dest, dev->broadcast, ETH1394_ALEN) == 0 || | |
7136b807 BC |
1608 | proto == htons(ETH_P_ARP) || |
1609 | (proto == htons(ETH_P_IP) && | |
eddc9ec5 | 1610 | IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) { |
1da177e4 LT |
1611 | tx_type = ETH1394_GASP; |
1612 | dest_node = LOCAL_BUS | ALL_NODES; | |
1613 | max_payload = priv->bc_maxpayload - ETHER1394_GASP_OVERHEAD; | |
efbeccf1 | 1614 | BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD); |
1da177e4 LT |
1615 | dgl = priv->bc_dgl; |
1616 | if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF]) | |
1617 | priv->bc_dgl++; | |
1618 | } else { | |
c20e3945 DM |
1619 | __be64 guid = get_unaligned((u64 *)eth->h_dest); |
1620 | ||
1da177e4 | 1621 | node = eth1394_find_node_guid(&priv->ip_node_list, |
c20e3945 | 1622 | be64_to_cpu(guid)); |
1da177e4 LT |
1623 | if (!node) { |
1624 | ret = -EAGAIN; | |
1625 | goto fail; | |
1626 | } | |
efbeccf1 SR |
1627 | node_info = |
1628 | (struct eth1394_node_info *)node->ud->device.driver_data; | |
6737231e | 1629 | if (node_info->fifo == CSR1212_INVALID_ADDR_SPACE) { |
1da177e4 LT |
1630 | ret = -EAGAIN; |
1631 | goto fail; | |
1632 | } | |
1633 | ||
1634 | dest_node = node->ud->ne->nodeid; | |
1635 | max_payload = node_info->maxpayload; | |
efbeccf1 | 1636 | BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD); |
1da177e4 LT |
1637 | |
1638 | dgl = node_info->dgl; | |
1639 | if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF]) | |
1640 | node_info->dgl++; | |
1641 | tx_type = ETH1394_WRREQ; | |
1642 | } | |
1643 | ||
1644 | /* If this is an ARP packet, convert it */ | |
7136b807 | 1645 | if (proto == htons(ETH_P_ARP)) |
efbeccf1 | 1646 | ether1394_arp_to_1394arp(skb, dev); |
1da177e4 LT |
1647 | |
1648 | ptask->hdr.words.word1 = 0; | |
1649 | ptask->hdr.words.word2 = 0; | |
1650 | ptask->hdr.words.word3 = 0; | |
1651 | ptask->hdr.words.word4 = 0; | |
1652 | ptask->skb = skb; | |
1653 | ptask->priv = priv; | |
1654 | ptask->tx_type = tx_type; | |
1655 | ||
1656 | if (tx_type != ETH1394_GASP) { | |
1657 | u64 addr; | |
1658 | ||
1659 | spin_lock_irqsave(&priv->lock, flags); | |
1660 | addr = node_info->fifo; | |
1661 | spin_unlock_irqrestore(&priv->lock, flags); | |
1662 | ||
1663 | ptask->addr = addr; | |
1664 | ptask->dest_node = dest_node; | |
1665 | } | |
1666 | ||
1667 | ptask->tx_type = tx_type; | |
1668 | ptask->max_payload = max_payload; | |
efbeccf1 SR |
1669 | ptask->outstanding_pkts = ether1394_encapsulate_prep(max_payload, |
1670 | proto, &ptask->hdr, dg_size, dgl); | |
1da177e4 LT |
1671 | |
1672 | /* Add the encapsulation header to the fragment */ | |
1673 | tx_len = ether1394_encapsulate(skb, max_payload, &ptask->hdr); | |
1674 | dev->trans_start = jiffies; | |
1675 | if (ether1394_send_packet(ptask, tx_len)) | |
1676 | goto fail; | |
1677 | ||
1678 | netif_wake_queue(dev); | |
1679 | return 0; | |
1680 | fail: | |
1681 | if (ptask) | |
1682 | kmem_cache_free(packet_task_cache, ptask); | |
1683 | ||
1684 | if (skb != NULL) | |
1685 | dev_kfree_skb(skb); | |
1686 | ||
efbeccf1 | 1687 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
1688 | priv->stats.tx_dropped++; |
1689 | priv->stats.tx_errors++; | |
efbeccf1 | 1690 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
1691 | |
1692 | if (netif_queue_stopped(dev)) | |
1693 | netif_wake_queue(dev); | |
1694 | ||
1695 | return 0; /* returning non-zero causes serious problems */ | |
1696 | } | |
1697 | ||
efbeccf1 SR |
1698 | static void ether1394_get_drvinfo(struct net_device *dev, |
1699 | struct ethtool_drvinfo *info) | |
1da177e4 | 1700 | { |
efbeccf1 SR |
1701 | strcpy(info->driver, driver_name); |
1702 | strcpy(info->bus_info, "ieee1394"); /* FIXME provide more detail? */ | |
1da177e4 LT |
1703 | } |
1704 | ||
1705 | static struct ethtool_ops ethtool_ops = { | |
1706 | .get_drvinfo = ether1394_get_drvinfo | |
1707 | }; | |
1708 | ||
1709 | static int __init ether1394_init_module (void) | |
1710 | { | |
efbeccf1 SR |
1711 | packet_task_cache = kmem_cache_create("packet_task", |
1712 | sizeof(struct packet_task), | |
1da177e4 LT |
1713 | 0, 0, NULL, NULL); |
1714 | ||
1da177e4 | 1715 | hpsb_register_highlevel(ð1394_highlevel); |
1da177e4 LT |
1716 | return hpsb_register_protocol(ð1394_proto_driver); |
1717 | } | |
1718 | ||
1719 | static void __exit ether1394_exit_module (void) | |
1720 | { | |
1721 | hpsb_unregister_protocol(ð1394_proto_driver); | |
1722 | hpsb_unregister_highlevel(ð1394_highlevel); | |
1723 | kmem_cache_destroy(packet_task_cache); | |
1724 | } | |
1725 | ||
1726 | module_init(ether1394_init_module); | |
1727 | module_exit(ether1394_exit_module); |