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-rw-r--r--drivers/ieee1394/eth1394.c1736
1 files changed, 0 insertions, 1736 deletions
diff --git a/drivers/ieee1394/eth1394.c b/drivers/ieee1394/eth1394.c
deleted file mode 100644
index bc289e367e30..000000000000
--- a/drivers/ieee1394/eth1394.c
+++ /dev/null
@@ -1,1736 +0,0 @@
1/*
2 * eth1394.c -- IPv4 driver for Linux IEEE-1394 Subsystem
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
25/*
26 * This driver intends to support RFC 2734, which describes a method for
27 * transporting IPv4 datagrams over IEEE-1394 serial busses.
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
42#include <linux/module.h>
43
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#include <linux/workqueue.h>
51
52#include <linux/netdevice.h>
53#include <linux/inetdevice.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>
64#include <asm/unaligned.h>
65#include <net/arp.h>
66
67#include "config_roms.h"
68#include "csr1212.h"
69#include "eth1394.h"
70#include "highlevel.h"
71#include "ieee1394.h"
72#include "ieee1394_core.h"
73#include "ieee1394_hotplug.h"
74#include "ieee1394_transactions.h"
75#include "ieee1394_types.h"
76#include "iso.h"
77#include "nodemgr.h"
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
85struct fragment_info {
86 struct list_head list;
87 int offset;
88 int len;
89};
90
91struct partial_datagram {
92 struct list_head list;
93 u16 dgl;
94 u16 dg_size;
95 __be16 ether_type;
96 struct sk_buff *skb;
97 char *pbuf;
98 struct list_head frag_info;
99};
100
101struct pdg_list {
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 */
105};
106
107struct eth1394_host_info {
108 struct hpsb_host *host;
109 struct net_device *dev;
110};
111
112struct eth1394_node_ref {
113 struct unit_directory *ud;
114 struct list_head list;
115};
116
117struct eth1394_node_info {
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 */
123};
124
125static const char driver_name[] = "eth1394";
126
127static struct kmem_cache *packet_task_cache;
128
129static struct hpsb_highlevel eth1394_highlevel;
130
131/* Use common.lf to determine header len */
132static const int hdr_type_len[] = {
133 sizeof(struct eth1394_uf_hdr),
134 sizeof(struct eth1394_ff_hdr),
135 sizeof(struct eth1394_sf_hdr),
136 sizeof(struct eth1394_sf_hdr)
137};
138
139static const u16 eth1394_speedto_maxpayload[] = {
140/* S100, S200, S400, S800, S1600, S3200 */
141 512, 1024, 2048, 4096, 4096, 4096
142};
143
144MODULE_AUTHOR("Ben Collins (bcollins@debian.org)");
145MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)");
146MODULE_LICENSE("GPL");
147
148/*
149 * The max_partial_datagrams parameter is the maximum number of fragmented
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 */
154static int max_partial_datagrams = 25;
155module_param(max_partial_datagrams, int, S_IRUGO | S_IWUSR);
156MODULE_PARM_DESC(max_partial_datagrams,
157 "Maximum number of partially received fragmented datagrams "
158 "(default = 25).");
159
160
161static int ether1394_header(struct sk_buff *skb, struct net_device *dev,
162 unsigned short type, const void *daddr,
163 const void *saddr, unsigned len);
164static int ether1394_rebuild_header(struct sk_buff *skb);
165static int ether1394_header_parse(const struct sk_buff *skb,
166 unsigned char *haddr);
167static int ether1394_header_cache(const struct neighbour *neigh,
168 struct hh_cache *hh);
169static void ether1394_header_cache_update(struct hh_cache *hh,
170 const struct net_device *dev,
171 const unsigned char *haddr);
172static netdev_tx_t ether1394_tx(struct sk_buff *skb,
173 struct net_device *dev);
174static void ether1394_iso(struct hpsb_iso *iso);
175
176static const struct ethtool_ops ethtool_ops;
177
178static int ether1394_write(struct hpsb_host *host, int srcid, int destid,
179 quadlet_t *data, u64 addr, size_t len, u16 flags);
180static void ether1394_add_host(struct hpsb_host *host);
181static void ether1394_remove_host(struct hpsb_host *host);
182static void ether1394_host_reset(struct hpsb_host *host);
183
184/* Function for incoming 1394 packets */
185static const struct hpsb_address_ops addr_ops = {
186 .write = ether1394_write,
187};
188
189/* Ieee1394 highlevel driver functions */
190static struct hpsb_highlevel eth1394_highlevel = {
191 .name = driver_name,
192 .add_host = ether1394_add_host,
193 .remove_host = ether1394_remove_host,
194 .host_reset = ether1394_host_reset,
195};
196
197static int ether1394_recv_init(struct eth1394_priv *priv)
198{
199 unsigned int iso_buf_size;
200
201 /* FIXME: rawiso limits us to PAGE_SIZE */
202 iso_buf_size = min((unsigned int)PAGE_SIZE,
203 2 * (1U << (priv->host->csr.max_rec + 1)));
204
205 priv->iso = hpsb_iso_recv_init(priv->host,
206 ETHER1394_GASP_BUFFERS * iso_buf_size,
207 ETHER1394_GASP_BUFFERS,
208 priv->broadcast_channel,
209 HPSB_ISO_DMA_PACKET_PER_BUFFER,
210 1, ether1394_iso);
211 if (priv->iso == NULL) {
212 ETH1394_PRINT_G(KERN_ERR, "Failed to allocate IR context\n");
213 priv->bc_state = ETHER1394_BC_ERROR;
214 return -EAGAIN;
215 }
216
217 if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0)
218 priv->bc_state = ETHER1394_BC_STOPPED;
219 else
220 priv->bc_state = ETHER1394_BC_RUNNING;
221 return 0;
222}
223
224/* This is called after an "ifup" */
225static int ether1394_open(struct net_device *dev)
226{
227 struct eth1394_priv *priv = netdev_priv(dev);
228 int ret;
229
230 if (priv->bc_state == ETHER1394_BC_ERROR) {
231 ret = ether1394_recv_init(priv);
232 if (ret)
233 return ret;
234 }
235 netif_start_queue(dev);
236 return 0;
237}
238
239/* This is called after an "ifdown" */
240static int ether1394_stop(struct net_device *dev)
241{
242 /* flush priv->wake */
243 flush_scheduled_work();
244
245 netif_stop_queue(dev);
246 return 0;
247}
248
249/* FIXME: What to do if we timeout? I think a host reset is probably in order,
250 * so that's what we do. Should we increment the stat counters too? */
251static void ether1394_tx_timeout(struct net_device *dev)
252{
253 struct hpsb_host *host =
254 ((struct eth1394_priv *)netdev_priv(dev))->host;
255
256 ETH1394_PRINT(KERN_ERR, dev->name, "Timeout, resetting host\n");
257 ether1394_host_reset(host);
258}
259
260static inline int ether1394_max_mtu(struct hpsb_host* host)
261{
262 return (1 << (host->csr.max_rec + 1))
263 - sizeof(union eth1394_hdr) - ETHER1394_GASP_OVERHEAD;
264}
265
266static int ether1394_change_mtu(struct net_device *dev, int new_mtu)
267{
268 int max_mtu;
269
270 if (new_mtu < 68)
271 return -EINVAL;
272
273 max_mtu = ether1394_max_mtu(
274 ((struct eth1394_priv *)netdev_priv(dev))->host);
275 if (new_mtu > max_mtu) {
276 ETH1394_PRINT(KERN_INFO, dev->name,
277 "Local node constrains MTU to %d\n", max_mtu);
278 return -ERANGE;
279 }
280
281 dev->mtu = new_mtu;
282 return 0;
283}
284
285static void purge_partial_datagram(struct list_head *old)
286{
287 struct partial_datagram *pd;
288 struct list_head *lh, *n;
289 struct fragment_info *fi;
290
291 pd = list_entry(old, struct partial_datagram, list);
292
293 list_for_each_safe(lh, n, &pd->frag_info) {
294 fi = list_entry(lh, struct fragment_info, list);
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
307static 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
319static 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
331static struct eth1394_node_ref *eth1394_find_node_nodeid(struct list_head *inl,
332 nodeid_t nodeid)
333{
334 struct eth1394_node_ref *node;
335
336 list_for_each_entry(node, inl, list)
337 if (node->ud->ne->nodeid == nodeid)
338 return node;
339
340 return NULL;
341}
342
343static int eth1394_new_node(struct eth1394_host_info *hi,
344 struct unit_directory *ud)
345{
346 struct eth1394_priv *priv;
347 struct eth1394_node_ref *new_node;
348 struct eth1394_node_info *node_info;
349
350 new_node = kmalloc(sizeof(*new_node), GFP_KERNEL);
351 if (!new_node)
352 return -ENOMEM;
353
354 node_info = kmalloc(sizeof(*node_info), GFP_KERNEL);
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;
363 node_info->fifo = CSR1212_INVALID_ADDR_SPACE;
364
365 dev_set_drvdata(&ud->device, 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);
370 return 0;
371}
372
373static 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(&eth1394_highlevel, ud->ne->host);
380 if (!hi)
381 return -ENOENT;
382
383 return eth1394_new_node(hi, ud);
384}
385
386static 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(&eth1394_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);
404 if (!old_node)
405 return 0;
406
407 list_del(&old_node->list);
408 kfree(old_node);
409
410 node_info = dev_get_drvdata(&ud->device);
411
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);
418
419 kfree(node_info);
420 dev_set_drvdata(&ud->device, NULL);
421 return 0;
422}
423
424static 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;
429
430 hi = hpsb_get_hostinfo(&eth1394_highlevel, ud->ne->host);
431 if (!hi)
432 return -ENOENT;
433
434 priv = netdev_priv(hi->dev);
435 node = eth1394_find_node(&priv->ip_node_list, ud);
436 if (node)
437 return 0;
438
439 return eth1394_new_node(hi, ud);
440}
441
442static const 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
452MODULE_DEVICE_TABLE(ieee1394, eth1394_id_table);
453
454static struct hpsb_protocol_driver eth1394_proto_driver = {
455 .name = driver_name,
456 .id_table = eth1394_id_table,
457 .update = eth1394_update,
458 .driver = {
459 .probe = eth1394_probe,
460 .remove = eth1394_remove,
461 },
462};
463
464static void ether1394_reset_priv(struct net_device *dev, int set_mtu)
465{
466 unsigned long flags;
467 int i;
468 struct eth1394_priv *priv = netdev_priv(dev);
469 struct hpsb_host *host = priv->host;
470 u64 guid = get_unaligned((u64 *)&(host->csr.rom->bus_info_data[3]));
471 int max_speed = IEEE1394_SPEED_MAX;
472
473 spin_lock_irqsave(&priv->lock, flags);
474
475 memset(priv->ud_list, 0, sizeof(priv->ud_list));
476 priv->bc_maxpayload = 512;
477
478 /* Determine speed limit */
479 /* FIXME: This is broken for nodes with link speed < PHY speed,
480 * and it is suboptimal for S200B...S800B hardware.
481 * The result of nodemgr's speed probe should be used somehow. */
482 for (i = 0; i < host->node_count; i++) {
483 /* take care of S100B...S400B PHY ports */
484 if (host->speed[i] == SELFID_SPEED_UNKNOWN) {
485 max_speed = IEEE1394_SPEED_100;
486 break;
487 }
488 if (max_speed > host->speed[i])
489 max_speed = host->speed[i];
490 }
491 priv->bc_sspd = max_speed;
492
493 if (set_mtu) {
494 /* Use the RFC 2734 default 1500 octets or the maximum payload
495 * as initial MTU */
496 dev->mtu = min(1500, ether1394_max_mtu(host));
497
498 /* Set our hardware address while we're at it */
499 memcpy(dev->dev_addr, &guid, sizeof(u64));
500 memset(dev->broadcast, 0xff, sizeof(u64));
501 }
502
503 spin_unlock_irqrestore(&priv->lock, flags);
504}
505
506static const struct header_ops ether1394_header_ops = {
507 .create = ether1394_header,
508 .rebuild = ether1394_rebuild_header,
509 .cache = ether1394_header_cache,
510 .cache_update = ether1394_header_cache_update,
511 .parse = ether1394_header_parse,
512};
513
514static const struct net_device_ops ether1394_netdev_ops = {
515 .ndo_open = ether1394_open,
516 .ndo_stop = ether1394_stop,
517 .ndo_start_xmit = ether1394_tx,
518 .ndo_tx_timeout = ether1394_tx_timeout,
519 .ndo_change_mtu = ether1394_change_mtu,
520};
521
522static void ether1394_init_dev(struct net_device *dev)
523{
524
525 dev->header_ops = &ether1394_header_ops;
526 dev->netdev_ops = &ether1394_netdev_ops;
527
528 SET_ETHTOOL_OPS(dev, &ethtool_ops);
529
530 dev->watchdog_timeo = ETHER1394_TIMEOUT;
531 dev->flags = IFF_BROADCAST | IFF_MULTICAST;
532 dev->features = NETIF_F_HIGHDMA;
533 dev->addr_len = ETH1394_ALEN;
534 dev->hard_header_len = ETH1394_HLEN;
535 dev->type = ARPHRD_IEEE1394;
536
537 /* FIXME: This value was copied from ether_setup(). Is it too much? */
538 dev->tx_queue_len = 1000;
539}
540
541/*
542 * Wake the queue up after commonly encountered transmit failure conditions are
543 * hopefully over. Currently only tlabel exhaustion is accounted for.
544 */
545static void ether1394_wake_queue(struct work_struct *work)
546{
547 struct eth1394_priv *priv;
548 struct hpsb_packet *packet;
549
550 priv = container_of(work, struct eth1394_priv, wake);
551 packet = hpsb_alloc_packet(0);
552
553 /* This is really bad, but unjam the queue anyway. */
554 if (!packet)
555 goto out;
556
557 packet->host = priv->host;
558 packet->node_id = priv->wake_node;
559 /*
560 * A transaction label is all we really want. If we get one, it almost
561 * always means we can get a lot more because the ieee1394 core recycled
562 * a whole batch of tlabels, at last.
563 */
564 if (hpsb_get_tlabel(packet) == 0)
565 hpsb_free_tlabel(packet);
566
567 hpsb_free_packet(packet);
568out:
569 netif_wake_queue(priv->wake_dev);
570}
571
572/*
573 * This function is called every time a card is found. It is generally called
574 * when the module is installed. This is where we add all of our ethernet
575 * devices. One for each host.
576 */
577static void ether1394_add_host(struct hpsb_host *host)
578{
579 struct eth1394_host_info *hi = NULL;
580 struct net_device *dev = NULL;
581 struct eth1394_priv *priv;
582 u64 fifo_addr;
583
584 if (hpsb_config_rom_ip1394_add(host) != 0) {
585 ETH1394_PRINT_G(KERN_ERR, "Can't add IP-over-1394 ROM entry\n");
586 return;
587 }
588
589 fifo_addr = hpsb_allocate_and_register_addrspace(
590 &eth1394_highlevel, host, &addr_ops,
591 ETHER1394_REGION_ADDR_LEN, ETHER1394_REGION_ADDR_LEN,
592 CSR1212_INVALID_ADDR_SPACE, CSR1212_INVALID_ADDR_SPACE);
593 if (fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
594 ETH1394_PRINT_G(KERN_ERR, "Cannot register CSR space\n");
595 hpsb_config_rom_ip1394_remove(host);
596 return;
597 }
598
599 dev = alloc_netdev(sizeof(*priv), "eth%d", ether1394_init_dev);
600 if (dev == NULL) {
601 ETH1394_PRINT_G(KERN_ERR, "Out of memory\n");
602 goto out;
603 }
604
605 SET_NETDEV_DEV(dev, &host->device);
606
607 priv = netdev_priv(dev);
608 INIT_LIST_HEAD(&priv->ip_node_list);
609 spin_lock_init(&priv->lock);
610 priv->host = host;
611 priv->local_fifo = fifo_addr;
612 INIT_WORK(&priv->wake, ether1394_wake_queue);
613 priv->wake_dev = dev;
614
615 hi = hpsb_create_hostinfo(&eth1394_highlevel, host, sizeof(*hi));
616 if (hi == NULL) {
617 ETH1394_PRINT_G(KERN_ERR, "Out of memory\n");
618 goto out;
619 }
620
621 ether1394_reset_priv(dev, 1);
622
623 if (register_netdev(dev)) {
624 ETH1394_PRINT_G(KERN_ERR, "Cannot register the driver\n");
625 goto out;
626 }
627
628 ETH1394_PRINT(KERN_INFO, dev->name, "IPv4 over IEEE 1394 (fw-host%d)\n",
629 host->id);
630
631 hi->host = host;
632 hi->dev = dev;
633
634 /* Ignore validity in hopes that it will be set in the future. It'll
635 * be checked when the eth device is opened. */
636 priv->broadcast_channel = host->csr.broadcast_channel & 0x3f;
637
638 ether1394_recv_init(priv);
639 return;
640out:
641 if (dev)
642 free_netdev(dev);
643 if (hi)
644 hpsb_destroy_hostinfo(&eth1394_highlevel, host);
645 hpsb_unregister_addrspace(&eth1394_highlevel, host, fifo_addr);
646 hpsb_config_rom_ip1394_remove(host);
647}
648
649/* Remove a card from our list */
650static void ether1394_remove_host(struct hpsb_host *host)
651{
652 struct eth1394_host_info *hi;
653 struct eth1394_priv *priv;
654
655 hi = hpsb_get_hostinfo(&eth1394_highlevel, host);
656 if (!hi)
657 return;
658 priv = netdev_priv(hi->dev);
659 hpsb_unregister_addrspace(&eth1394_highlevel, host, priv->local_fifo);
660 hpsb_config_rom_ip1394_remove(host);
661 if (priv->iso)
662 hpsb_iso_shutdown(priv->iso);
663 unregister_netdev(hi->dev);
664 free_netdev(hi->dev);
665}
666
667/* A bus reset happened */
668static void ether1394_host_reset(struct hpsb_host *host)
669{
670 struct eth1394_host_info *hi;
671 struct eth1394_priv *priv;
672 struct net_device *dev;
673 struct list_head *lh, *n;
674 struct eth1394_node_ref *node;
675 struct eth1394_node_info *node_info;
676 unsigned long flags;
677
678 hi = hpsb_get_hostinfo(&eth1394_highlevel, host);
679
680 /* This can happen for hosts that we don't use */
681 if (!hi)
682 return;
683
684 dev = hi->dev;
685 priv = netdev_priv(dev);
686
687 /* Reset our private host data, but not our MTU */
688 netif_stop_queue(dev);
689 ether1394_reset_priv(dev, 0);
690
691 list_for_each_entry(node, &priv->ip_node_list, list) {
692 node_info = dev_get_drvdata(&node->ud->device);
693
694 spin_lock_irqsave(&node_info->pdg.lock, flags);
695
696 list_for_each_safe(lh, n, &node_info->pdg.list)
697 purge_partial_datagram(lh);
698
699 INIT_LIST_HEAD(&(node_info->pdg.list));
700 node_info->pdg.sz = 0;
701
702 spin_unlock_irqrestore(&node_info->pdg.lock, flags);
703 }
704
705 netif_wake_queue(dev);
706}
707
708/******************************************
709 * HW Header net device functions
710 ******************************************/
711/* These functions have been adapted from net/ethernet/eth.c */
712
713/* Create a fake MAC header for an arbitrary protocol layer.
714 * saddr=NULL means use device source address
715 * daddr=NULL means leave destination address (eg unresolved arp). */
716static int ether1394_header(struct sk_buff *skb, struct net_device *dev,
717 unsigned short type, const void *daddr,
718 const void *saddr, unsigned len)
719{
720 struct eth1394hdr *eth =
721 (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN);
722
723 eth->h_proto = htons(type);
724
725 if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
726 memset(eth->h_dest, 0, dev->addr_len);
727 return dev->hard_header_len;
728 }
729
730 if (daddr) {
731 memcpy(eth->h_dest, daddr, dev->addr_len);
732 return dev->hard_header_len;
733 }
734
735 return -dev->hard_header_len;
736}
737
738/* Rebuild the faked MAC header. This is called after an ARP
739 * (or in future other address resolution) has completed on this
740 * sk_buff. We now let ARP fill in the other fields.
741 *
742 * This routine CANNOT use cached dst->neigh!
743 * Really, it is used only when dst->neigh is wrong.
744 */
745static int ether1394_rebuild_header(struct sk_buff *skb)
746{
747 struct eth1394hdr *eth = (struct eth1394hdr *)skb->data;
748
749 if (eth->h_proto == htons(ETH_P_IP))
750 return arp_find((unsigned char *)&eth->h_dest, skb);
751
752 ETH1394_PRINT(KERN_DEBUG, skb->dev->name,
753 "unable to resolve type %04x addresses\n",
754 ntohs(eth->h_proto));
755 return 0;
756}
757
758static int ether1394_header_parse(const struct sk_buff *skb,
759 unsigned char *haddr)
760{
761 memcpy(haddr, skb->dev->dev_addr, ETH1394_ALEN);
762 return ETH1394_ALEN;
763}
764
765static int ether1394_header_cache(const struct neighbour *neigh,
766 struct hh_cache *hh)
767{
768 __be16 type = hh->hh_type;
769 struct net_device *dev = neigh->dev;
770 struct eth1394hdr *eth =
771 (struct eth1394hdr *)((u8 *)hh->hh_data + 16 - ETH1394_HLEN);
772
773 if (type == htons(ETH_P_802_3))
774 return -1;
775
776 eth->h_proto = type;
777 memcpy(eth->h_dest, neigh->ha, dev->addr_len);
778
779 hh->hh_len = ETH1394_HLEN;
780 return 0;
781}
782
783/* Called by Address Resolution module to notify changes in address. */
784static void ether1394_header_cache_update(struct hh_cache *hh,
785 const struct net_device *dev,
786 const unsigned char * haddr)
787{
788 memcpy((u8 *)hh->hh_data + 16 - ETH1394_HLEN, haddr, dev->addr_len);
789}
790
791/******************************************
792 * Datagram reception code
793 ******************************************/
794
795/* Copied from net/ethernet/eth.c */
796static __be16 ether1394_type_trans(struct sk_buff *skb, struct net_device *dev)
797{
798 struct eth1394hdr *eth;
799 unsigned char *rawp;
800
801 skb_reset_mac_header(skb);
802 skb_pull(skb, ETH1394_HLEN);
803 eth = eth1394_hdr(skb);
804
805 if (*eth->h_dest & 1) {
806 if (memcmp(eth->h_dest, dev->broadcast, dev->addr_len) == 0)
807 skb->pkt_type = PACKET_BROADCAST;
808#if 0
809 else
810 skb->pkt_type = PACKET_MULTICAST;
811#endif
812 } else {
813 if (memcmp(eth->h_dest, dev->dev_addr, dev->addr_len))
814 skb->pkt_type = PACKET_OTHERHOST;
815 }
816
817 if (ntohs(eth->h_proto) >= 1536)
818 return eth->h_proto;
819
820 rawp = skb->data;
821
822 if (*(unsigned short *)rawp == 0xFFFF)
823 return htons(ETH_P_802_3);
824
825 return htons(ETH_P_802_2);
826}
827
828/* Parse an encapsulated IP1394 header into an ethernet frame packet.
829 * We also perform ARP translation here, if need be. */
830static __be16 ether1394_parse_encap(struct sk_buff *skb, struct net_device *dev,
831 nodeid_t srcid, nodeid_t destid,
832 __be16 ether_type)
833{
834 struct eth1394_priv *priv = netdev_priv(dev);
835 __be64 dest_hw;
836 __be16 ret = 0;
837
838 /* Setup our hw addresses. We use these to build the ethernet header. */
839 if (destid == (LOCAL_BUS | ALL_NODES))
840 dest_hw = ~cpu_to_be64(0); /* broadcast */
841 else
842 dest_hw = cpu_to_be64((u64)priv->host->csr.guid_hi << 32 |
843 priv->host->csr.guid_lo);
844
845 /* If this is an ARP packet, convert it. First, we want to make
846 * use of some of the fields, since they tell us a little bit
847 * about the sending machine. */
848 if (ether_type == htons(ETH_P_ARP)) {
849 struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data;
850 struct arphdr *arp = (struct arphdr *)skb->data;
851 unsigned char *arp_ptr = (unsigned char *)(arp + 1);
852 u64 fifo_addr = (u64)ntohs(arp1394->fifo_hi) << 32 |
853 ntohl(arp1394->fifo_lo);
854 u8 max_rec = min(priv->host->csr.max_rec,
855 (u8)(arp1394->max_rec));
856 int sspd = arp1394->sspd;
857 u16 maxpayload;
858 struct eth1394_node_ref *node;
859 struct eth1394_node_info *node_info;
860 __be64 guid;
861
862 /* Sanity check. MacOSX seems to be sending us 131 in this
863 * field (atleast on my Panther G5). Not sure why. */
864 if (sspd > 5 || sspd < 0)
865 sspd = 0;
866
867 maxpayload = min(eth1394_speedto_maxpayload[sspd],
868 (u16)(1 << (max_rec + 1)));
869
870 guid = get_unaligned(&arp1394->s_uniq_id);
871 node = eth1394_find_node_guid(&priv->ip_node_list,
872 be64_to_cpu(guid));
873 if (!node)
874 return cpu_to_be16(0);
875
876 node_info = dev_get_drvdata(&node->ud->device);
877
878 /* Update our speed/payload/fifo_offset table */
879 node_info->maxpayload = maxpayload;
880 node_info->sspd = sspd;
881 node_info->fifo = fifo_addr;
882
883 /* Now that we're done with the 1394 specific stuff, we'll
884 * need to alter some of the data. Believe it or not, all
885 * that needs to be done is sender_IP_address needs to be
886 * moved, the destination hardware address get stuffed
887 * in and the hardware address length set to 8.
888 *
889 * IMPORTANT: The code below overwrites 1394 specific data
890 * needed above so keep the munging of the data for the
891 * higher level IP stack last. */
892
893 arp->ar_hln = 8;
894 arp_ptr += arp->ar_hln; /* skip over sender unique id */
895 *(u32 *)arp_ptr = arp1394->sip; /* move sender IP addr */
896 arp_ptr += arp->ar_pln; /* skip over sender IP addr */
897
898 if (arp->ar_op == htons(ARPOP_REQUEST))
899 memset(arp_ptr, 0, sizeof(u64));
900 else
901 memcpy(arp_ptr, dev->dev_addr, sizeof(u64));
902 }
903
904 /* Now add the ethernet header. */
905 if (dev_hard_header(skb, dev, ntohs(ether_type), &dest_hw, NULL,
906 skb->len) >= 0)
907 ret = ether1394_type_trans(skb, dev);
908
909 return ret;
910}
911
912static int fragment_overlap(struct list_head *frag_list, int offset, int len)
913{
914 struct fragment_info *fi;
915 int end = offset + len;
916
917 list_for_each_entry(fi, frag_list, list)
918 if (offset < fi->offset + fi->len && end > fi->offset)
919 return 1;
920
921 return 0;
922}
923
924static struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl)
925{
926 struct partial_datagram *pd;
927
928 list_for_each_entry(pd, pdgl, list)
929 if (pd->dgl == dgl)
930 return &pd->list;
931
932 return NULL;
933}
934
935/* Assumes that new fragment does not overlap any existing fragments */
936static int new_fragment(struct list_head *frag_info, int offset, int len)
937{
938 struct list_head *lh;
939 struct fragment_info *fi, *fi2, *new;
940
941 list_for_each(lh, frag_info) {
942 fi = list_entry(lh, struct fragment_info, list);
943 if (fi->offset + fi->len == offset) {
944 /* The new fragment can be tacked on to the end */
945 fi->len += len;
946 /* Did the new fragment plug a hole? */
947 fi2 = list_entry(lh->next, struct fragment_info, list);
948 if (fi->offset + fi->len == fi2->offset) {
949 /* glue fragments together */
950 fi->len += fi2->len;
951 list_del(lh->next);
952 kfree(fi2);
953 }
954 return 0;
955 } else if (offset + len == fi->offset) {
956 /* The new fragment can be tacked on to the beginning */
957 fi->offset = offset;
958 fi->len += len;
959 /* Did the new fragment plug a hole? */
960 fi2 = list_entry(lh->prev, struct fragment_info, list);
961 if (fi2->offset + fi2->len == fi->offset) {
962 /* glue fragments together */
963 fi2->len += fi->len;
964 list_del(lh);
965 kfree(fi);
966 }
967 return 0;
968 } else if (offset > fi->offset + fi->len) {
969 break;
970 } else if (offset + len < fi->offset) {
971 lh = lh->prev;
972 break;
973 }
974 }
975
976 new = kmalloc(sizeof(*new), GFP_ATOMIC);
977 if (!new)
978 return -ENOMEM;
979
980 new->offset = offset;
981 new->len = len;
982
983 list_add(&new->list, lh);
984 return 0;
985}
986
987static int new_partial_datagram(struct net_device *dev, struct list_head *pdgl,
988 int dgl, int dg_size, char *frag_buf,
989 int frag_off, int frag_len)
990{
991 struct partial_datagram *new;
992
993 new = kmalloc(sizeof(*new), GFP_ATOMIC);
994 if (!new)
995 return -ENOMEM;
996
997 INIT_LIST_HEAD(&new->frag_info);
998
999 if (new_fragment(&new->frag_info, frag_off, frag_len) < 0) {
1000 kfree(new);
1001 return -ENOMEM;
1002 }
1003
1004 new->dgl = dgl;
1005 new->dg_size = dg_size;
1006
1007 new->skb = dev_alloc_skb(dg_size + dev->hard_header_len + 15);
1008 if (!new->skb) {
1009 struct fragment_info *fi = list_entry(new->frag_info.next,
1010 struct fragment_info,
1011 list);
1012 kfree(fi);
1013 kfree(new);
1014 return -ENOMEM;
1015 }
1016
1017 skb_reserve(new->skb, (dev->hard_header_len + 15) & ~15);
1018 new->pbuf = skb_put(new->skb, dg_size);
1019 memcpy(new->pbuf + frag_off, frag_buf, frag_len);
1020
1021 list_add(&new->list, pdgl);
1022 return 0;
1023}
1024
1025static int update_partial_datagram(struct list_head *pdgl, struct list_head *lh,
1026 char *frag_buf, int frag_off, int frag_len)
1027{
1028 struct partial_datagram *pd =
1029 list_entry(lh, struct partial_datagram, list);
1030
1031 if (new_fragment(&pd->frag_info, frag_off, frag_len) < 0)
1032 return -ENOMEM;
1033
1034 memcpy(pd->pbuf + frag_off, frag_buf, frag_len);
1035
1036 /* Move list entry to beginnig of list so that oldest partial
1037 * datagrams percolate to the end of the list */
1038 list_move(lh, pdgl);
1039 return 0;
1040}
1041
1042static int is_datagram_complete(struct list_head *lh, int dg_size)
1043{
1044 struct partial_datagram *pd;
1045 struct fragment_info *fi;
1046
1047 pd = list_entry(lh, struct partial_datagram, list);
1048 fi = list_entry(pd->frag_info.next, struct fragment_info, list);
1049
1050 return (fi->len == dg_size);
1051}
1052
1053/* Packet reception. We convert the IP1394 encapsulation header to an
1054 * ethernet header, and fill it with some of our other fields. This is
1055 * an incoming packet from the 1394 bus. */
1056static int ether1394_data_handler(struct net_device *dev, int srcid, int destid,
1057 char *buf, int len)
1058{
1059 struct sk_buff *skb;
1060 unsigned long flags;
1061 struct eth1394_priv *priv = netdev_priv(dev);
1062 union eth1394_hdr *hdr = (union eth1394_hdr *)buf;
1063 __be16 ether_type = cpu_to_be16(0); /* initialized to clear warning */
1064 int hdr_len;
1065 struct unit_directory *ud = priv->ud_list[NODEID_TO_NODE(srcid)];
1066 struct eth1394_node_info *node_info;
1067
1068 if (!ud) {
1069 struct eth1394_node_ref *node;
1070 node = eth1394_find_node_nodeid(&priv->ip_node_list, srcid);
1071 if (unlikely(!node)) {
1072 HPSB_PRINT(KERN_ERR, "ether1394 rx: sender nodeid "
1073 "lookup failure: " NODE_BUS_FMT,
1074 NODE_BUS_ARGS(priv->host, srcid));
1075 dev->stats.rx_dropped++;
1076 return -1;
1077 }
1078 ud = node->ud;
1079
1080 priv->ud_list[NODEID_TO_NODE(srcid)] = ud;
1081 }
1082
1083 node_info = dev_get_drvdata(&ud->device);
1084
1085 /* First, did we receive a fragmented or unfragmented datagram? */
1086 hdr->words.word1 = ntohs(hdr->words.word1);
1087
1088 hdr_len = hdr_type_len[hdr->common.lf];
1089
1090 if (hdr->common.lf == ETH1394_HDR_LF_UF) {
1091 /* An unfragmented datagram has been received by the ieee1394
1092 * bus. Build an skbuff around it so we can pass it to the
1093 * high level network layer. */
1094
1095 skb = dev_alloc_skb(len + dev->hard_header_len + 15);
1096 if (unlikely(!skb)) {
1097 ETH1394_PRINT_G(KERN_ERR, "Out of memory\n");
1098 dev->stats.rx_dropped++;
1099 return -1;
1100 }
1101 skb_reserve(skb, (dev->hard_header_len + 15) & ~15);
1102 memcpy(skb_put(skb, len - hdr_len), buf + hdr_len,
1103 len - hdr_len);
1104 ether_type = hdr->uf.ether_type;
1105 } else {
1106 /* A datagram fragment has been received, now the fun begins. */
1107
1108 struct list_head *pdgl, *lh;
1109 struct partial_datagram *pd;
1110 int fg_off;
1111 int fg_len = len - hdr_len;
1112 int dg_size;
1113 int dgl;
1114 int retval;
1115 struct pdg_list *pdg = &(node_info->pdg);
1116
1117 hdr->words.word3 = ntohs(hdr->words.word3);
1118 /* The 4th header word is reserved so no need to do ntohs() */
1119
1120 if (hdr->common.lf == ETH1394_HDR_LF_FF) {
1121 ether_type = hdr->ff.ether_type;
1122 dgl = hdr->ff.dgl;
1123 dg_size = hdr->ff.dg_size + 1;
1124 fg_off = 0;
1125 } else {
1126 hdr->words.word2 = ntohs(hdr->words.word2);
1127 dgl = hdr->sf.dgl;
1128 dg_size = hdr->sf.dg_size + 1;
1129 fg_off = hdr->sf.fg_off;
1130 }
1131 spin_lock_irqsave(&pdg->lock, flags);
1132
1133 pdgl = &(pdg->list);
1134 lh = find_partial_datagram(pdgl, dgl);
1135
1136 if (lh == NULL) {
1137 while (pdg->sz >= max_partial_datagrams) {
1138 /* remove the oldest */
1139 purge_partial_datagram(pdgl->prev);
1140 pdg->sz--;
1141 }
1142
1143 retval = new_partial_datagram(dev, pdgl, dgl, dg_size,
1144 buf + hdr_len, fg_off,
1145 fg_len);
1146 if (retval < 0) {
1147 spin_unlock_irqrestore(&pdg->lock, flags);
1148 goto bad_proto;
1149 }
1150 pdg->sz++;
1151 lh = find_partial_datagram(pdgl, dgl);
1152 } else {
1153 pd = list_entry(lh, struct partial_datagram, list);
1154
1155 if (fragment_overlap(&pd->frag_info, fg_off, fg_len)) {
1156 /* Overlapping fragments, obliterate old
1157 * datagram and start new one. */
1158 purge_partial_datagram(lh);
1159 retval = new_partial_datagram(dev, pdgl, dgl,
1160 dg_size,
1161 buf + hdr_len,
1162 fg_off, fg_len);
1163 if (retval < 0) {
1164 pdg->sz--;
1165 spin_unlock_irqrestore(&pdg->lock, flags);
1166 goto bad_proto;
1167 }
1168 } else {
1169 retval = update_partial_datagram(pdgl, lh,
1170 buf + hdr_len,
1171 fg_off, fg_len);
1172 if (retval < 0) {
1173 /* Couldn't save off fragment anyway
1174 * so might as well obliterate the
1175 * datagram now. */
1176 purge_partial_datagram(lh);
1177 pdg->sz--;
1178 spin_unlock_irqrestore(&pdg->lock, flags);
1179 goto bad_proto;
1180 }
1181 } /* fragment overlap */
1182 } /* new datagram or add to existing one */
1183
1184 pd = list_entry(lh, struct partial_datagram, list);
1185
1186 if (hdr->common.lf == ETH1394_HDR_LF_FF)
1187 pd->ether_type = ether_type;
1188
1189 if (is_datagram_complete(lh, dg_size)) {
1190 ether_type = pd->ether_type;
1191 pdg->sz--;
1192 skb = skb_get(pd->skb);
1193 purge_partial_datagram(lh);
1194 spin_unlock_irqrestore(&pdg->lock, flags);
1195 } else {
1196 /* Datagram is not complete, we're done for the
1197 * moment. */
1198 spin_unlock_irqrestore(&pdg->lock, flags);
1199 return 0;
1200 }
1201 } /* unframgented datagram or fragmented one */
1202
1203 /* Write metadata, and then pass to the receive level */
1204 skb->dev = dev;
1205 skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */
1206
1207 /* Parse the encapsulation header. This actually does the job of
1208 * converting to an ethernet frame header, aswell as arp
1209 * conversion if needed. ARP conversion is easier in this
1210 * direction, since we are using ethernet as our backend. */
1211 skb->protocol = ether1394_parse_encap(skb, dev, srcid, destid,
1212 ether_type);
1213
1214 spin_lock_irqsave(&priv->lock, flags);
1215
1216 if (!skb->protocol) {
1217 dev->stats.rx_errors++;
1218 dev->stats.rx_dropped++;
1219 dev_kfree_skb_any(skb);
1220 } else if (netif_rx(skb) == NET_RX_DROP) {
1221 dev->stats.rx_errors++;
1222 dev->stats.rx_dropped++;
1223 } else {
1224 dev->stats.rx_packets++;
1225 dev->stats.rx_bytes += skb->len;
1226 }
1227
1228 spin_unlock_irqrestore(&priv->lock, flags);
1229
1230bad_proto:
1231 if (netif_queue_stopped(dev))
1232 netif_wake_queue(dev);
1233
1234 return 0;
1235}
1236
1237static int ether1394_write(struct hpsb_host *host, int srcid, int destid,
1238 quadlet_t *data, u64 addr, size_t len, u16 flags)
1239{
1240 struct eth1394_host_info *hi;
1241
1242 hi = hpsb_get_hostinfo(&eth1394_highlevel, host);
1243 if (unlikely(!hi)) {
1244 ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n",
1245 host->id);
1246 return RCODE_ADDRESS_ERROR;
1247 }
1248
1249 if (ether1394_data_handler(hi->dev, srcid, destid, (char*)data, len))
1250 return RCODE_ADDRESS_ERROR;
1251 else
1252 return RCODE_COMPLETE;
1253}
1254
1255static void ether1394_iso(struct hpsb_iso *iso)
1256{
1257 __be32 *data;
1258 char *buf;
1259 struct eth1394_host_info *hi;
1260 struct net_device *dev;
1261 unsigned int len;
1262 u32 specifier_id;
1263 u16 source_id;
1264 int i;
1265 int nready;
1266
1267 hi = hpsb_get_hostinfo(&eth1394_highlevel, iso->host);
1268 if (unlikely(!hi)) {
1269 ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n",
1270 iso->host->id);
1271 return;
1272 }
1273
1274 dev = hi->dev;
1275
1276 nready = hpsb_iso_n_ready(iso);
1277 for (i = 0; i < nready; i++) {
1278 struct hpsb_iso_packet_info *info =
1279 &iso->infos[(iso->first_packet + i) % iso->buf_packets];
1280 data = (__be32 *)(iso->data_buf.kvirt + info->offset);
1281
1282 /* skip over GASP header */
1283 buf = (char *)data + 8;
1284 len = info->len - 8;
1285
1286 specifier_id = (be32_to_cpu(data[0]) & 0xffff) << 8 |
1287 (be32_to_cpu(data[1]) & 0xff000000) >> 24;
1288 source_id = be32_to_cpu(data[0]) >> 16;
1289
1290 if (info->channel != (iso->host->csr.broadcast_channel & 0x3f)
1291 || specifier_id != ETHER1394_GASP_SPECIFIER_ID) {
1292 /* This packet is not for us */
1293 continue;
1294 }
1295 ether1394_data_handler(dev, source_id, LOCAL_BUS | ALL_NODES,
1296 buf, len);
1297 }
1298
1299 hpsb_iso_recv_release_packets(iso, i);
1300
1301}
1302
1303/******************************************
1304 * Datagram transmission code
1305 ******************************************/
1306
1307/* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire
1308 * arphdr) is the same format as the ip1394 header, so they overlap. The rest
1309 * needs to be munged a bit. The remainder of the arphdr is formatted based
1310 * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to
1311 * judge.
1312 *
1313 * Now that the EUI is used for the hardware address all we need to do to make
1314 * this work for 1394 is to insert 2 quadlets that contain max_rec size,
1315 * speed, and unicast FIFO address information between the sender_unique_id
1316 * and the IP addresses.
1317 */
1318static void ether1394_arp_to_1394arp(struct sk_buff *skb,
1319 struct net_device *dev)
1320{
1321 struct eth1394_priv *priv = netdev_priv(dev);
1322 struct arphdr *arp = (struct arphdr *)skb->data;
1323 unsigned char *arp_ptr = (unsigned char *)(arp + 1);
1324 struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data;
1325
1326 arp1394->hw_addr_len = 16;
1327 arp1394->sip = *(u32*)(arp_ptr + ETH1394_ALEN);
1328 arp1394->max_rec = priv->host->csr.max_rec;
1329 arp1394->sspd = priv->host->csr.lnk_spd;
1330 arp1394->fifo_hi = htons(priv->local_fifo >> 32);
1331 arp1394->fifo_lo = htonl(priv->local_fifo & ~0x0);
1332}
1333
1334/* We need to encapsulate the standard header with our own. We use the
1335 * ethernet header's proto for our own. */
1336static unsigned int ether1394_encapsulate_prep(unsigned int max_payload,
1337 __be16 proto,
1338 union eth1394_hdr *hdr,
1339 u16 dg_size, u16 dgl)
1340{
1341 unsigned int adj_max_payload =
1342 max_payload - hdr_type_len[ETH1394_HDR_LF_UF];
1343
1344 /* Does it all fit in one packet? */
1345 if (dg_size <= adj_max_payload) {
1346 hdr->uf.lf = ETH1394_HDR_LF_UF;
1347 hdr->uf.ether_type = proto;
1348 } else {
1349 hdr->ff.lf = ETH1394_HDR_LF_FF;
1350 hdr->ff.ether_type = proto;
1351 hdr->ff.dg_size = dg_size - 1;
1352 hdr->ff.dgl = dgl;
1353 adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_FF];
1354 }
1355 return DIV_ROUND_UP(dg_size, adj_max_payload);
1356}
1357
1358static unsigned int ether1394_encapsulate(struct sk_buff *skb,
1359 unsigned int max_payload,
1360 union eth1394_hdr *hdr)
1361{
1362 union eth1394_hdr *bufhdr;
1363 int ftype = hdr->common.lf;
1364 int hdrsz = hdr_type_len[ftype];
1365 unsigned int adj_max_payload = max_payload - hdrsz;
1366
1367 switch (ftype) {
1368 case ETH1394_HDR_LF_UF:
1369 bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz);
1370 bufhdr->words.word1 = htons(hdr->words.word1);
1371 bufhdr->words.word2 = hdr->words.word2;
1372 break;
1373
1374 case ETH1394_HDR_LF_FF:
1375 bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz);
1376 bufhdr->words.word1 = htons(hdr->words.word1);
1377 bufhdr->words.word2 = hdr->words.word2;
1378 bufhdr->words.word3 = htons(hdr->words.word3);
1379 bufhdr->words.word4 = 0;
1380
1381 /* Set frag type here for future interior fragments */
1382 hdr->common.lf = ETH1394_HDR_LF_IF;
1383 hdr->sf.fg_off = 0;
1384 break;
1385
1386 default:
1387 hdr->sf.fg_off += adj_max_payload;
1388 bufhdr = (union eth1394_hdr *)skb_pull(skb, adj_max_payload);
1389 if (max_payload >= skb->len)
1390 hdr->common.lf = ETH1394_HDR_LF_LF;
1391 bufhdr->words.word1 = htons(hdr->words.word1);
1392 bufhdr->words.word2 = htons(hdr->words.word2);
1393 bufhdr->words.word3 = htons(hdr->words.word3);
1394 bufhdr->words.word4 = 0;
1395 }
1396 return min(max_payload, skb->len);
1397}
1398
1399static struct hpsb_packet *ether1394_alloc_common_packet(struct hpsb_host *host)
1400{
1401 struct hpsb_packet *p;
1402
1403 p = hpsb_alloc_packet(0);
1404 if (p) {
1405 p->host = host;
1406 p->generation = get_hpsb_generation(host);
1407 p->type = hpsb_async;
1408 }
1409 return p;
1410}
1411
1412static int ether1394_prep_write_packet(struct hpsb_packet *p,
1413 struct hpsb_host *host, nodeid_t node,
1414 u64 addr, void *data, int tx_len)
1415{
1416 p->node_id = node;
1417
1418 if (hpsb_get_tlabel(p))
1419 return -EAGAIN;
1420
1421 p->tcode = TCODE_WRITEB;
1422 p->header_size = 16;
1423 p->expect_response = 1;
1424 p->header[0] =
1425 p->node_id << 16 | p->tlabel << 10 | 1 << 8 | TCODE_WRITEB << 4;
1426 p->header[1] = host->node_id << 16 | addr >> 32;
1427 p->header[2] = addr & 0xffffffff;
1428 p->header[3] = tx_len << 16;
1429 p->data_size = (tx_len + 3) & ~3;
1430 p->data = data;
1431
1432 return 0;
1433}
1434
1435static void ether1394_prep_gasp_packet(struct hpsb_packet *p,
1436 struct eth1394_priv *priv,
1437 struct sk_buff *skb, int length)
1438{
1439 p->header_size = 4;
1440 p->tcode = TCODE_STREAM_DATA;
1441
1442 p->header[0] = length << 16 | 3 << 14 | priv->broadcast_channel << 8 |
1443 TCODE_STREAM_DATA << 4;
1444 p->data_size = length;
1445 p->data = (quadlet_t *)skb->data - 2;
1446 p->data[0] = cpu_to_be32(priv->host->node_id << 16 |
1447 ETHER1394_GASP_SPECIFIER_ID_HI);
1448 p->data[1] = cpu_to_be32(ETHER1394_GASP_SPECIFIER_ID_LO << 24 |
1449 ETHER1394_GASP_VERSION);
1450
1451 p->speed_code = priv->bc_sspd;
1452
1453 /* prevent hpsb_send_packet() from overriding our speed code */
1454 p->node_id = LOCAL_BUS | ALL_NODES;
1455}
1456
1457static void ether1394_free_packet(struct hpsb_packet *packet)
1458{
1459 if (packet->tcode != TCODE_STREAM_DATA)
1460 hpsb_free_tlabel(packet);
1461 hpsb_free_packet(packet);
1462}
1463
1464static void ether1394_complete_cb(void *__ptask);
1465
1466static int ether1394_send_packet(struct packet_task *ptask, unsigned int tx_len)
1467{
1468 struct eth1394_priv *priv = ptask->priv;
1469 struct hpsb_packet *packet = NULL;
1470
1471 packet = ether1394_alloc_common_packet(priv->host);
1472 if (!packet)
1473 return -ENOMEM;
1474
1475 if (ptask->tx_type == ETH1394_GASP) {
1476 int length = tx_len + 2 * sizeof(quadlet_t);
1477
1478 ether1394_prep_gasp_packet(packet, priv, ptask->skb, length);
1479 } else if (ether1394_prep_write_packet(packet, priv->host,
1480 ptask->dest_node,
1481 ptask->addr, ptask->skb->data,
1482 tx_len)) {
1483 hpsb_free_packet(packet);
1484 return -EAGAIN;
1485 }
1486
1487 ptask->packet = packet;
1488 hpsb_set_packet_complete_task(ptask->packet, ether1394_complete_cb,
1489 ptask);
1490
1491 if (hpsb_send_packet(packet) < 0) {
1492 ether1394_free_packet(packet);
1493 return -EIO;
1494 }
1495
1496 return 0;
1497}
1498
1499/* Task function to be run when a datagram transmission is completed */
1500static void ether1394_dg_complete(struct packet_task *ptask, int fail)
1501{
1502 struct sk_buff *skb = ptask->skb;
1503 struct net_device *dev = skb->dev;
1504 struct eth1394_priv *priv = netdev_priv(dev);
1505 unsigned long flags;
1506
1507 /* Statistics */
1508 spin_lock_irqsave(&priv->lock, flags);
1509 if (fail) {
1510 dev->stats.tx_dropped++;
1511 dev->stats.tx_errors++;
1512 } else {
1513 dev->stats.tx_bytes += skb->len;
1514 dev->stats.tx_packets++;
1515 }
1516 spin_unlock_irqrestore(&priv->lock, flags);
1517
1518 dev_kfree_skb_any(skb);
1519 kmem_cache_free(packet_task_cache, ptask);
1520}
1521
1522/* Callback for when a packet has been sent and the status of that packet is
1523 * known */
1524static void ether1394_complete_cb(void *__ptask)
1525{
1526 struct packet_task *ptask = (struct packet_task *)__ptask;
1527 struct hpsb_packet *packet = ptask->packet;
1528 int fail = 0;
1529
1530 if (packet->tcode != TCODE_STREAM_DATA)
1531 fail = hpsb_packet_success(packet);
1532
1533 ether1394_free_packet(packet);
1534
1535 ptask->outstanding_pkts--;
1536 if (ptask->outstanding_pkts > 0 && !fail) {
1537 int tx_len, err;
1538
1539 /* Add the encapsulation header to the fragment */
1540 tx_len = ether1394_encapsulate(ptask->skb, ptask->max_payload,
1541 &ptask->hdr);
1542 err = ether1394_send_packet(ptask, tx_len);
1543 if (err) {
1544 if (err == -EAGAIN)
1545 ETH1394_PRINT_G(KERN_ERR, "Out of tlabels\n");
1546
1547 ether1394_dg_complete(ptask, 1);
1548 }
1549 } else {
1550 ether1394_dg_complete(ptask, fail);
1551 }
1552}
1553
1554/* Transmit a packet (called by kernel) */
1555static netdev_tx_t ether1394_tx(struct sk_buff *skb,
1556 struct net_device *dev)
1557{
1558 struct eth1394hdr hdr_buf;
1559 struct eth1394_priv *priv = netdev_priv(dev);
1560 __be16 proto;
1561 unsigned long flags;
1562 nodeid_t dest_node;
1563 eth1394_tx_type tx_type;
1564 unsigned int tx_len;
1565 unsigned int max_payload;
1566 u16 dg_size;
1567 u16 dgl;
1568 struct packet_task *ptask;
1569 struct eth1394_node_ref *node;
1570 struct eth1394_node_info *node_info = NULL;
1571
1572 ptask = kmem_cache_alloc(packet_task_cache, GFP_ATOMIC);
1573 if (ptask == NULL)
1574 goto fail;
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 goto fail;
1582#endif
1583
1584 skb = skb_share_check(skb, GFP_ATOMIC);
1585 if (!skb)
1586 goto fail;
1587
1588 /* Get rid of the fake eth1394 header, but first make a copy.
1589 * We might need to rebuild the header on tx failure. */
1590 memcpy(&hdr_buf, skb->data, sizeof(hdr_buf));
1591 skb_pull(skb, ETH1394_HLEN);
1592
1593 proto = hdr_buf.h_proto;
1594 dg_size = skb->len;
1595
1596 /* Set the transmission type for the packet. ARP packets and IP
1597 * broadcast packets are sent via GASP. */
1598 if (memcmp(hdr_buf.h_dest, dev->broadcast, ETH1394_ALEN) == 0 ||
1599 proto == htons(ETH_P_ARP) ||
1600 (proto == htons(ETH_P_IP) &&
1601 IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) {
1602 tx_type = ETH1394_GASP;
1603 dest_node = LOCAL_BUS | ALL_NODES;
1604 max_payload = priv->bc_maxpayload - ETHER1394_GASP_OVERHEAD;
1605 BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD);
1606 dgl = priv->bc_dgl;
1607 if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF])
1608 priv->bc_dgl++;
1609 } else {
1610 __be64 guid = get_unaligned((__be64 *)hdr_buf.h_dest);
1611
1612 node = eth1394_find_node_guid(&priv->ip_node_list,
1613 be64_to_cpu(guid));
1614 if (!node)
1615 goto fail;
1616
1617 node_info = dev_get_drvdata(&node->ud->device);
1618 if (node_info->fifo == CSR1212_INVALID_ADDR_SPACE)
1619 goto fail;
1620
1621 dest_node = node->ud->ne->nodeid;
1622 max_payload = node_info->maxpayload;
1623 BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD);
1624
1625 dgl = node_info->dgl;
1626 if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF])
1627 node_info->dgl++;
1628 tx_type = ETH1394_WRREQ;
1629 }
1630
1631 /* If this is an ARP packet, convert it */
1632 if (proto == htons(ETH_P_ARP))
1633 ether1394_arp_to_1394arp(skb, dev);
1634
1635 ptask->hdr.words.word1 = 0;
1636 ptask->hdr.words.word2 = 0;
1637 ptask->hdr.words.word3 = 0;
1638 ptask->hdr.words.word4 = 0;
1639 ptask->skb = skb;
1640 ptask->priv = priv;
1641 ptask->tx_type = tx_type;
1642
1643 if (tx_type != ETH1394_GASP) {
1644 u64 addr;
1645
1646 spin_lock_irqsave(&priv->lock, flags);
1647 addr = node_info->fifo;
1648 spin_unlock_irqrestore(&priv->lock, flags);
1649
1650 ptask->addr = addr;
1651 ptask->dest_node = dest_node;
1652 }
1653
1654 ptask->tx_type = tx_type;
1655 ptask->max_payload = max_payload;
1656 ptask->outstanding_pkts = ether1394_encapsulate_prep(max_payload,
1657 proto, &ptask->hdr, dg_size, dgl);
1658
1659 /* Add the encapsulation header to the fragment */
1660 tx_len = ether1394_encapsulate(skb, max_payload, &ptask->hdr);
1661 dev->trans_start = jiffies;
1662 if (ether1394_send_packet(ptask, tx_len)) {
1663 if (dest_node == (LOCAL_BUS | ALL_NODES))
1664 goto fail;
1665
1666 /* At this point we want to restore the packet. When we return
1667 * here with NETDEV_TX_BUSY we will get another entrance in this
1668 * routine with the same skb and we need it to look the same.
1669 * So we pull 4 more bytes, then build the header again. */
1670 skb_pull(skb, 4);
1671 ether1394_header(skb, dev, ntohs(hdr_buf.h_proto),
1672 hdr_buf.h_dest, NULL, 0);
1673
1674 /* Most failures of ether1394_send_packet are recoverable. */
1675 netif_stop_queue(dev);
1676 priv->wake_node = dest_node;
1677 schedule_work(&priv->wake);
1678 kmem_cache_free(packet_task_cache, ptask);
1679 return NETDEV_TX_BUSY;
1680 }
1681
1682 return NETDEV_TX_OK;
1683fail:
1684 if (ptask)
1685 kmem_cache_free(packet_task_cache, ptask);
1686
1687 if (skb != NULL)
1688 dev_kfree_skb(skb);
1689
1690 spin_lock_irqsave(&priv->lock, flags);
1691 dev->stats.tx_dropped++;
1692 dev->stats.tx_errors++;
1693 spin_unlock_irqrestore(&priv->lock, flags);
1694
1695 return NETDEV_TX_OK;
1696}
1697
1698static void ether1394_get_drvinfo(struct net_device *dev,
1699 struct ethtool_drvinfo *info)
1700{
1701 strcpy(info->driver, driver_name);
1702 strcpy(info->bus_info, "ieee1394"); /* FIXME provide more detail? */
1703}
1704
1705static const struct ethtool_ops ethtool_ops = {
1706 .get_drvinfo = ether1394_get_drvinfo
1707};
1708
1709static int __init ether1394_init_module(void)
1710{
1711 int err;
1712
1713 packet_task_cache = kmem_cache_create("packet_task",
1714 sizeof(struct packet_task),
1715 0, 0, NULL);
1716 if (!packet_task_cache)
1717 return -ENOMEM;
1718
1719 hpsb_register_highlevel(&eth1394_highlevel);
1720 err = hpsb_register_protocol(&eth1394_proto_driver);
1721 if (err) {
1722 hpsb_unregister_highlevel(&eth1394_highlevel);
1723 kmem_cache_destroy(packet_task_cache);
1724 }
1725 return err;
1726}
1727
1728static void __exit ether1394_exit_module(void)
1729{
1730 hpsb_unregister_protocol(&eth1394_proto_driver);
1731 hpsb_unregister_highlevel(&eth1394_highlevel);
1732 kmem_cache_destroy(packet_task_cache);
1733}
1734
1735module_init(ether1394_init_module);
1736module_exit(ether1394_exit_module);
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-29 11:40:14 -0500