2 * eth1394.c -- Ethernet driver for Linux IEEE-1394 Subsystem
4 * Copyright (C) 2001-2003 Ben Collins <bcollins@debian.org>
5 * 2000 Bonin Franck <boninf@free.fr>
6 * 2003 Steve Kinneberg <kinnebergsteve@acmsystems.com>
8 * Mainly based on work by Emanuel Pirker and Andreas E. Bombe
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.
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.
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.
25 /* This driver intends to support RFC 2734, which describes a method for
26 * transporting IPv4 datagrams over IEEE-1394 serial busses. This driver
27 * will ultimately support that method, but currently falls short in
32 * - Add MCAP. Limited Multicast exists only to 224.0.0.1 and 224.0.0.2.
34 * Non-RFC 2734 related:
35 * - Handle fragmented skb's coming from the networking layer.
36 * - Move generic GASP reception to core 1394 code
37 * - Convert kmalloc/kfree for link fragments to use kmem_cache_* instead
38 * - Stability improvements
39 * - Performance enhancements
40 * - Consider garbage collecting old partial datagrams after X amount of time
44 #include <linux/module.h>
46 #include <linux/sched.h>
47 #include <linux/kernel.h>
48 #include <linux/slab.h>
49 #include <linux/errno.h>
50 #include <linux/types.h>
51 #include <linux/delay.h>
52 #include <linux/init.h>
54 #include <linux/netdevice.h>
55 #include <linux/inetdevice.h>
56 #include <linux/etherdevice.h>
57 #include <linux/if_arp.h>
58 #include <linux/if_ether.h>
61 #include <linux/tcp.h>
62 #include <linux/skbuff.h>
63 #include <linux/bitops.h>
64 #include <linux/ethtool.h>
65 #include <asm/uaccess.h>
66 #include <asm/delay.h>
67 #include <asm/semaphore.h>
71 #include "ieee1394_types.h"
72 #include "ieee1394_core.h"
73 #include "ieee1394_transactions.h"
75 #include "highlevel.h"
79 #include "config_roms.h"
81 #define ETH1394_PRINT_G(level, fmt, args...) \
82 printk(level "%s: " fmt, driver_name, ## args)
84 #define ETH1394_PRINT(level, dev_name, fmt, args...) \
85 printk(level "%s: %s: " fmt, driver_name, dev_name, ## args)
87 #define DEBUG(fmt, args...) \
88 printk(KERN_ERR "%s:%s[%d]: " fmt "\n", driver_name, __FUNCTION__, __LINE__, ## args)
89 #define TRACE() printk(KERN_ERR "%s:%s[%d] ---- TRACE\n", driver_name, __FUNCTION__, __LINE__)
91 struct fragment_info {
92 struct list_head list;
97 struct partial_datagram {
98 struct list_head list;
104 struct list_head frag_info;
108 struct list_head list; /* partial datagram list per node */
109 unsigned int sz; /* partial datagram list size per node */
110 spinlock_t lock; /* partial datagram lock */
113 struct eth1394_host_info {
114 struct hpsb_host *host;
115 struct net_device *dev;
118 struct eth1394_node_ref {
119 struct unit_directory *ud;
120 struct list_head list;
123 struct eth1394_node_info {
124 u16 maxpayload; /* Max payload */
125 u8 sspd; /* Max speed */
126 u64 fifo; /* FIFO address */
127 struct pdg_list pdg; /* partial RX datagram lists */
128 int dgl; /* Outgoing datagram label */
131 /* Our ieee1394 highlevel driver */
132 #define ETH1394_DRIVER_NAME "eth1394"
133 static const char driver_name[] = ETH1394_DRIVER_NAME;
135 static kmem_cache_t *packet_task_cache;
137 static struct hpsb_highlevel eth1394_highlevel;
139 /* Use common.lf to determine header len */
140 static const int hdr_type_len[] = {
141 sizeof (struct eth1394_uf_hdr),
142 sizeof (struct eth1394_ff_hdr),
143 sizeof (struct eth1394_sf_hdr),
144 sizeof (struct eth1394_sf_hdr)
147 /* Change this to IEEE1394_SPEED_S100 to make testing easier */
148 #define ETH1394_SPEED_DEF IEEE1394_SPEED_MAX
150 /* For now, this needs to be 1500, so that XP works with us */
151 #define ETH1394_DATA_LEN ETH_DATA_LEN
153 static const u16 eth1394_speedto_maxpayload[] = {
154 /* S100, S200, S400, S800, S1600, S3200 */
155 512, 1024, 2048, 4096, 4096, 4096
158 MODULE_AUTHOR("Ben Collins (bcollins@debian.org)");
159 MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)");
160 MODULE_LICENSE("GPL");
162 /* The max_partial_datagrams parameter is the maximum number of fragmented
163 * datagrams per node that eth1394 will keep in memory. Providing an upper
164 * bound allows us to limit the amount of memory that partial datagrams
165 * consume in the event that some partial datagrams are never completed.
167 static int max_partial_datagrams = 25;
168 module_param(max_partial_datagrams, int, S_IRUGO | S_IWUSR);
169 MODULE_PARM_DESC(max_partial_datagrams,
170 "Maximum number of partially received fragmented datagrams "
174 static int ether1394_header(struct sk_buff *skb, struct net_device *dev,
175 unsigned short type, void *daddr, void *saddr,
177 static int ether1394_rebuild_header(struct sk_buff *skb);
178 static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr);
179 static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh);
180 static void ether1394_header_cache_update(struct hh_cache *hh,
181 struct net_device *dev,
182 unsigned char * haddr);
183 static int ether1394_mac_addr(struct net_device *dev, void *p);
185 static void purge_partial_datagram(struct list_head *old);
186 static int ether1394_tx(struct sk_buff *skb, struct net_device *dev);
187 static void ether1394_iso(struct hpsb_iso *iso);
189 static struct ethtool_ops ethtool_ops;
191 static int ether1394_write(struct hpsb_host *host, int srcid, int destid,
192 quadlet_t *data, u64 addr, size_t len, u16 flags);
193 static void ether1394_add_host (struct hpsb_host *host);
194 static void ether1394_remove_host (struct hpsb_host *host);
195 static void ether1394_host_reset (struct hpsb_host *host);
197 /* Function for incoming 1394 packets */
198 static struct hpsb_address_ops addr_ops = {
199 .write = ether1394_write,
202 /* Ieee1394 highlevel driver functions */
203 static struct hpsb_highlevel eth1394_highlevel = {
205 .add_host = ether1394_add_host,
206 .remove_host = ether1394_remove_host,
207 .host_reset = ether1394_host_reset,
211 /* This is called after an "ifup" */
212 static int ether1394_open (struct net_device *dev)
214 struct eth1394_priv *priv = netdev_priv(dev);
217 /* Something bad happened, don't even try */
218 if (priv->bc_state == ETHER1394_BC_ERROR) {
219 /* we'll try again */
220 priv->iso = hpsb_iso_recv_init(priv->host,
221 ETHER1394_ISO_BUF_SIZE,
222 ETHER1394_GASP_BUFFERS,
223 priv->broadcast_channel,
224 HPSB_ISO_DMA_PACKET_PER_BUFFER,
226 if (priv->iso == NULL) {
227 ETH1394_PRINT(KERN_ERR, dev->name,
228 "Could not allocate isochronous receive "
229 "context for the broadcast channel\n");
230 priv->bc_state = ETHER1394_BC_ERROR;
233 if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0)
234 priv->bc_state = ETHER1394_BC_STOPPED;
236 priv->bc_state = ETHER1394_BC_RUNNING;
243 netif_start_queue (dev);
247 /* This is called after an "ifdown" */
248 static int ether1394_stop (struct net_device *dev)
250 netif_stop_queue (dev);
254 /* Return statistics to the caller */
255 static struct net_device_stats *ether1394_stats (struct net_device *dev)
257 return &(((struct eth1394_priv *)netdev_priv(dev))->stats);
260 /* What to do if we timeout. I think a host reset is probably in order, so
261 * that's what we do. Should we increment the stat counters too? */
262 static void ether1394_tx_timeout (struct net_device *dev)
264 ETH1394_PRINT (KERN_ERR, dev->name, "Timeout, resetting host %s\n",
265 ((struct eth1394_priv *)netdev_priv(dev))->host->driver->name);
267 highlevel_host_reset (((struct eth1394_priv *)netdev_priv(dev))->host);
269 netif_wake_queue (dev);
272 static int ether1394_change_mtu(struct net_device *dev, int new_mtu)
274 struct eth1394_priv *priv = netdev_priv(dev);
276 if ((new_mtu < 68) ||
277 (new_mtu > min(ETH1394_DATA_LEN,
278 (int)((1 << (priv->host->csr.max_rec + 1)) -
279 (sizeof(union eth1394_hdr) +
280 ETHER1394_GASP_OVERHEAD)))))
286 static void purge_partial_datagram(struct list_head *old)
288 struct partial_datagram *pd = list_entry(old, struct partial_datagram, list);
289 struct list_head *lh, *n;
291 list_for_each_safe(lh, n, &pd->frag_info) {
292 struct fragment_info *fi = list_entry(lh, struct fragment_info, list);
301 /******************************************
302 * 1394 bus activity functions
303 ******************************************/
305 static struct eth1394_node_ref *eth1394_find_node(struct list_head *inl,
306 struct unit_directory *ud)
308 struct eth1394_node_ref *node;
310 list_for_each_entry(node, inl, list)
317 static struct eth1394_node_ref *eth1394_find_node_guid(struct list_head *inl,
320 struct eth1394_node_ref *node;
322 list_for_each_entry(node, inl, list)
323 if (node->ud->ne->guid == guid)
329 static struct eth1394_node_ref *eth1394_find_node_nodeid(struct list_head *inl,
332 struct eth1394_node_ref *node;
333 list_for_each_entry(node, inl, list) {
334 if (node->ud->ne->nodeid == nodeid)
341 static int eth1394_probe(struct device *dev)
343 struct unit_directory *ud;
344 struct eth1394_host_info *hi;
345 struct eth1394_priv *priv;
346 struct eth1394_node_ref *new_node;
347 struct eth1394_node_info *node_info;
349 ud = container_of(dev, struct unit_directory, device);
351 hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host);
355 new_node = kmalloc(sizeof(*new_node),
356 in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
360 node_info = kmalloc(sizeof(*node_info),
361 in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
367 spin_lock_init(&node_info->pdg.lock);
368 INIT_LIST_HEAD(&node_info->pdg.list);
369 node_info->pdg.sz = 0;
370 node_info->fifo = ETHER1394_INVALID_ADDR;
372 ud->device.driver_data = node_info;
375 priv = netdev_priv(hi->dev);
376 list_add_tail(&new_node->list, &priv->ip_node_list);
381 static int eth1394_remove(struct device *dev)
383 struct unit_directory *ud;
384 struct eth1394_host_info *hi;
385 struct eth1394_priv *priv;
386 struct eth1394_node_ref *old_node;
387 struct eth1394_node_info *node_info;
388 struct list_head *lh, *n;
391 ud = container_of(dev, struct unit_directory, device);
392 hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host);
396 priv = netdev_priv(hi->dev);
398 old_node = eth1394_find_node(&priv->ip_node_list, ud);
401 list_del(&old_node->list);
404 node_info = (struct eth1394_node_info*)ud->device.driver_data;
406 spin_lock_irqsave(&node_info->pdg.lock, flags);
407 /* The partial datagram list should be empty, but we'll just
408 * make sure anyway... */
409 list_for_each_safe(lh, n, &node_info->pdg.list) {
410 purge_partial_datagram(lh);
412 spin_unlock_irqrestore(&node_info->pdg.lock, flags);
415 ud->device.driver_data = NULL;
420 static int eth1394_update(struct unit_directory *ud)
422 struct eth1394_host_info *hi;
423 struct eth1394_priv *priv;
424 struct eth1394_node_ref *node;
425 struct eth1394_node_info *node_info;
427 hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host);
431 priv = netdev_priv(hi->dev);
433 node = eth1394_find_node(&priv->ip_node_list, ud);
436 node = kmalloc(sizeof(*node),
437 in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
441 node_info = kmalloc(sizeof(*node_info),
442 in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
448 spin_lock_init(&node_info->pdg.lock);
449 INIT_LIST_HEAD(&node_info->pdg.list);
450 node_info->pdg.sz = 0;
452 ud->device.driver_data = node_info;
455 priv = netdev_priv(hi->dev);
456 list_add_tail(&node->list, &priv->ip_node_list);
463 static struct ieee1394_device_id eth1394_id_table[] = {
465 .match_flags = (IEEE1394_MATCH_SPECIFIER_ID |
466 IEEE1394_MATCH_VERSION),
467 .specifier_id = ETHER1394_GASP_SPECIFIER_ID,
468 .version = ETHER1394_GASP_VERSION,
473 MODULE_DEVICE_TABLE(ieee1394, eth1394_id_table);
475 static struct hpsb_protocol_driver eth1394_proto_driver = {
476 .name = "IPv4 over 1394 Driver",
477 .id_table = eth1394_id_table,
478 .update = eth1394_update,
480 .name = ETH1394_DRIVER_NAME,
481 .bus = &ieee1394_bus_type,
482 .probe = eth1394_probe,
483 .remove = eth1394_remove,
488 static void ether1394_reset_priv (struct net_device *dev, int set_mtu)
492 struct eth1394_priv *priv = netdev_priv(dev);
493 struct hpsb_host *host = priv->host;
494 u64 guid = *((u64*)&(host->csr.rom->bus_info_data[3]));
495 u16 maxpayload = 1 << (host->csr.max_rec + 1);
496 int max_speed = IEEE1394_SPEED_MAX;
498 spin_lock_irqsave (&priv->lock, flags);
500 memset(priv->ud_list, 0, sizeof(struct node_entry*) * ALL_NODES);
501 priv->bc_maxpayload = 512;
503 /* Determine speed limit */
504 for (i = 0; i < host->node_count; i++)
505 if (max_speed > host->speed[i])
506 max_speed = host->speed[i];
507 priv->bc_sspd = max_speed;
509 /* We'll use our maxpayload as the default mtu */
511 dev->mtu = min(ETH1394_DATA_LEN,
513 (sizeof(union eth1394_hdr) +
514 ETHER1394_GASP_OVERHEAD)));
516 /* Set our hardware address while we're at it */
517 *(u64*)dev->dev_addr = guid;
518 *(u64*)dev->broadcast = ~0x0ULL;
521 spin_unlock_irqrestore (&priv->lock, flags);
524 /* This function is called right before register_netdev */
525 static void ether1394_init_dev (struct net_device *dev)
528 dev->open = ether1394_open;
529 dev->stop = ether1394_stop;
530 dev->hard_start_xmit = ether1394_tx;
531 dev->get_stats = ether1394_stats;
532 dev->tx_timeout = ether1394_tx_timeout;
533 dev->change_mtu = ether1394_change_mtu;
535 dev->hard_header = ether1394_header;
536 dev->rebuild_header = ether1394_rebuild_header;
537 dev->hard_header_cache = ether1394_header_cache;
538 dev->header_cache_update= ether1394_header_cache_update;
539 dev->hard_header_parse = ether1394_header_parse;
540 dev->set_mac_address = ether1394_mac_addr;
541 SET_ETHTOOL_OPS(dev, ðtool_ops);
544 dev->watchdog_timeo = ETHER1394_TIMEOUT;
545 dev->flags = IFF_BROADCAST | IFF_MULTICAST;
546 dev->features = NETIF_F_HIGHDMA;
547 dev->addr_len = ETH1394_ALEN;
548 dev->hard_header_len = ETH1394_HLEN;
549 dev->type = ARPHRD_IEEE1394;
551 ether1394_reset_priv (dev, 1);
555 * This function is called every time a card is found. It is generally called
556 * when the module is installed. This is where we add all of our ethernet
557 * devices. One for each host.
559 static void ether1394_add_host (struct hpsb_host *host)
561 struct eth1394_host_info *hi = NULL;
562 struct net_device *dev = NULL;
563 struct eth1394_priv *priv;
566 if (!(host->config_roms & HPSB_CONFIG_ROM_ENTRY_IP1394))
569 fifo_addr = hpsb_allocate_and_register_addrspace(ð1394_highlevel,
572 ETHER1394_REGION_ADDR_LEN,
573 ETHER1394_REGION_ADDR_LEN,
575 if (fifo_addr == ~0ULL)
578 /* We should really have our own alloc_hpsbdev() function in
579 * net_init.c instead of calling the one for ethernet then hijacking
580 * it for ourselves. That way we'd be a real networking device. */
581 dev = alloc_etherdev(sizeof (struct eth1394_priv));
584 ETH1394_PRINT_G (KERN_ERR, "Out of memory trying to allocate "
585 "etherdevice for IEEE 1394 device %s-%d\n",
586 host->driver->name, host->id);
590 SET_MODULE_OWNER(dev);
591 SET_NETDEV_DEV(dev, &host->device);
593 priv = netdev_priv(dev);
595 INIT_LIST_HEAD(&priv->ip_node_list);
597 spin_lock_init(&priv->lock);
599 priv->local_fifo = fifo_addr;
601 hi = hpsb_create_hostinfo(ð1394_highlevel, host, sizeof(*hi));
604 ETH1394_PRINT_G (KERN_ERR, "Out of memory trying to create "
605 "hostinfo for IEEE 1394 device %s-%d\n",
606 host->driver->name, host->id);
610 ether1394_init_dev(dev);
612 if (register_netdev (dev)) {
613 ETH1394_PRINT (KERN_ERR, dev->name, "Error registering network driver\n");
617 ETH1394_PRINT (KERN_INFO, dev->name, "IEEE-1394 IPv4 over 1394 Ethernet (fw-host%d)\n",
623 /* Ignore validity in hopes that it will be set in the future. It'll
624 * be checked when the eth device is opened. */
625 priv->broadcast_channel = host->csr.broadcast_channel & 0x3f;
627 priv->iso = hpsb_iso_recv_init(host,
628 ETHER1394_ISO_BUF_SIZE,
629 ETHER1394_GASP_BUFFERS,
630 priv->broadcast_channel,
631 HPSB_ISO_DMA_PACKET_PER_BUFFER,
633 if (priv->iso == NULL) {
634 ETH1394_PRINT(KERN_ERR, dev->name,
635 "Could not allocate isochronous receive context "
636 "for the broadcast channel\n");
637 priv->bc_state = ETHER1394_BC_ERROR;
639 if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0)
640 priv->bc_state = ETHER1394_BC_STOPPED;
642 priv->bc_state = ETHER1394_BC_RUNNING;
651 hpsb_destroy_hostinfo(ð1394_highlevel, host);
656 /* Remove a card from our list */
657 static void ether1394_remove_host (struct hpsb_host *host)
659 struct eth1394_host_info *hi;
661 hi = hpsb_get_hostinfo(ð1394_highlevel, host);
663 struct eth1394_priv *priv = netdev_priv(hi->dev);
665 hpsb_unregister_addrspace(ð1394_highlevel, host,
668 if (priv->iso != NULL)
669 hpsb_iso_shutdown(priv->iso);
672 unregister_netdev (hi->dev);
673 free_netdev(hi->dev);
680 /* A reset has just arisen */
681 static void ether1394_host_reset (struct hpsb_host *host)
683 struct eth1394_host_info *hi;
684 struct eth1394_priv *priv;
685 struct net_device *dev;
686 struct list_head *lh, *n;
687 struct eth1394_node_ref *node;
688 struct eth1394_node_info *node_info;
691 hi = hpsb_get_hostinfo(ð1394_highlevel, host);
693 /* This can happen for hosts that we don't use */
698 priv = (struct eth1394_priv *)netdev_priv(dev);
700 /* Reset our private host data, but not our mtu */
701 netif_stop_queue (dev);
702 ether1394_reset_priv (dev, 0);
704 list_for_each_entry(node, &priv->ip_node_list, list) {
705 node_info = (struct eth1394_node_info*)node->ud->device.driver_data;
707 spin_lock_irqsave(&node_info->pdg.lock, flags);
709 list_for_each_safe(lh, n, &node_info->pdg.list) {
710 purge_partial_datagram(lh);
713 INIT_LIST_HEAD(&(node_info->pdg.list));
714 node_info->pdg.sz = 0;
716 spin_unlock_irqrestore(&node_info->pdg.lock, flags);
719 netif_wake_queue (dev);
722 /******************************************
723 * HW Header net device functions
724 ******************************************/
725 /* These functions have been adapted from net/ethernet/eth.c */
728 /* Create a fake MAC header for an arbitrary protocol layer.
729 * saddr=NULL means use device source address
730 * daddr=NULL means leave destination address (eg unresolved arp). */
731 static int ether1394_header(struct sk_buff *skb, struct net_device *dev,
732 unsigned short type, void *daddr, void *saddr,
735 struct eth1394hdr *eth = (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN);
737 eth->h_proto = htons(type);
739 if (dev->flags & (IFF_LOOPBACK|IFF_NOARP)) {
740 memset(eth->h_dest, 0, dev->addr_len);
741 return(dev->hard_header_len);
745 memcpy(eth->h_dest,daddr,dev->addr_len);
746 return dev->hard_header_len;
749 return -dev->hard_header_len;
754 /* Rebuild the faked MAC header. This is called after an ARP
755 * (or in future other address resolution) has completed on this
756 * sk_buff. We now let ARP fill in the other fields.
758 * This routine CANNOT use cached dst->neigh!
759 * Really, it is used only when dst->neigh is wrong.
761 static int ether1394_rebuild_header(struct sk_buff *skb)
763 struct eth1394hdr *eth = (struct eth1394hdr *)skb->data;
764 struct net_device *dev = skb->dev;
766 switch (eth->h_proto) {
769 case __constant_htons(ETH_P_IP):
770 return arp_find((unsigned char*)ð->h_dest, skb);
773 ETH1394_PRINT(KERN_DEBUG, dev->name,
774 "unable to resolve type %04x addresses.\n",
782 static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr)
784 struct net_device *dev = skb->dev;
785 memcpy(haddr, dev->dev_addr, ETH1394_ALEN);
790 static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh)
792 unsigned short type = hh->hh_type;
793 struct eth1394hdr *eth = (struct eth1394hdr*)(((u8*)hh->hh_data) +
794 (16 - ETH1394_HLEN));
795 struct net_device *dev = neigh->dev;
797 if (type == __constant_htons(ETH_P_802_3)) {
802 memcpy(eth->h_dest, neigh->ha, dev->addr_len);
804 hh->hh_len = ETH1394_HLEN;
808 /* Called by Address Resolution module to notify changes in address. */
809 static void ether1394_header_cache_update(struct hh_cache *hh,
810 struct net_device *dev,
811 unsigned char * haddr)
813 memcpy(((u8*)hh->hh_data) + (16 - ETH1394_HLEN), haddr, dev->addr_len);
816 static int ether1394_mac_addr(struct net_device *dev, void *p)
818 if (netif_running(dev))
821 /* Not going to allow setting the MAC address, we really need to use
822 * the real one supplied by the hardware */
828 /******************************************
829 * Datagram reception code
830 ******************************************/
832 /* Copied from net/ethernet/eth.c */
833 static inline u16 ether1394_type_trans(struct sk_buff *skb,
834 struct net_device *dev)
836 struct eth1394hdr *eth;
839 skb->mac.raw = skb->data;
840 skb_pull (skb, ETH1394_HLEN);
841 eth = eth1394_hdr(skb);
843 if (*eth->h_dest & 1) {
844 if (memcmp(eth->h_dest, dev->broadcast, dev->addr_len)==0)
845 skb->pkt_type = PACKET_BROADCAST;
848 skb->pkt_type = PACKET_MULTICAST;
851 if (memcmp(eth->h_dest, dev->dev_addr, dev->addr_len))
852 skb->pkt_type = PACKET_OTHERHOST;
855 if (ntohs (eth->h_proto) >= 1536)
860 if (*(unsigned short *)rawp == 0xFFFF)
861 return htons (ETH_P_802_3);
863 return htons (ETH_P_802_2);
866 /* Parse an encapsulated IP1394 header into an ethernet frame packet.
867 * We also perform ARP translation here, if need be. */
868 static inline u16 ether1394_parse_encap(struct sk_buff *skb,
869 struct net_device *dev,
870 nodeid_t srcid, nodeid_t destid,
873 struct eth1394_priv *priv = netdev_priv(dev);
875 unsigned short ret = 0;
877 /* Setup our hw addresses. We use these to build the
878 * ethernet header. */
879 if (destid == (LOCAL_BUS | ALL_NODES))
880 dest_hw = ~0ULL; /* broadcast */
882 dest_hw = cpu_to_be64((((u64)priv->host->csr.guid_hi) << 32) |
883 priv->host->csr.guid_lo);
885 /* If this is an ARP packet, convert it. First, we want to make
886 * use of some of the fields, since they tell us a little bit
887 * about the sending machine. */
888 if (ether_type == __constant_htons (ETH_P_ARP)) {
889 struct eth1394_arp *arp1394 = (struct eth1394_arp*)skb->data;
890 struct arphdr *arp = (struct arphdr *)skb->data;
891 unsigned char *arp_ptr = (unsigned char *)(arp + 1);
892 u64 fifo_addr = (u64)ntohs(arp1394->fifo_hi) << 32 |
893 ntohl(arp1394->fifo_lo);
894 u8 max_rec = min(priv->host->csr.max_rec,
895 (u8)(arp1394->max_rec));
896 int sspd = arp1394->sspd;
898 struct eth1394_node_ref *node;
899 struct eth1394_node_info *node_info;
901 /* Sanity check. MacOSX seems to be sending us 131 in this
902 * field (atleast on my Panther G5). Not sure why. */
903 if (sspd > 5 || sspd < 0)
906 maxpayload = min(eth1394_speedto_maxpayload[sspd], (u16)(1 << (max_rec + 1)));
908 node = eth1394_find_node_guid(&priv->ip_node_list,
909 be64_to_cpu(arp1394->s_uniq_id));
914 node_info = (struct eth1394_node_info*)node->ud->device.driver_data;
916 /* Update our speed/payload/fifo_offset table */
917 node_info->maxpayload = maxpayload;
918 node_info->sspd = sspd;
919 node_info->fifo = fifo_addr;
921 /* Now that we're done with the 1394 specific stuff, we'll
922 * need to alter some of the data. Believe it or not, all
923 * that needs to be done is sender_IP_address needs to be
924 * moved, the destination hardware address get stuffed
925 * in and the hardware address length set to 8.
927 * IMPORTANT: The code below overwrites 1394 specific data
928 * needed above so keep the munging of the data for the
929 * higher level IP stack last. */
932 arp_ptr += arp->ar_hln; /* skip over sender unique id */
933 *(u32*)arp_ptr = arp1394->sip; /* move sender IP addr */
934 arp_ptr += arp->ar_pln; /* skip over sender IP addr */
936 if (arp->ar_op == htons(ARPOP_REQUEST))
937 /* just set ARP req target unique ID to 0 */
938 *((u64*)arp_ptr) = 0;
940 *((u64*)arp_ptr) = *((u64*)dev->dev_addr);
943 /* Now add the ethernet header. */
944 if (dev->hard_header (skb, dev, __constant_ntohs (ether_type),
945 &dest_hw, NULL, skb->len) >= 0)
946 ret = ether1394_type_trans(skb, dev);
951 static inline int fragment_overlap(struct list_head *frag_list, int offset, int len)
953 struct fragment_info *fi;
955 list_for_each_entry(fi, frag_list, list) {
956 if ( ! ((offset > (fi->offset + fi->len - 1)) ||
957 ((offset + len - 1) < fi->offset)))
963 static inline struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl)
965 struct partial_datagram *pd;
967 list_for_each_entry(pd, pdgl, list) {
974 /* Assumes that new fragment does not overlap any existing fragments */
975 static inline int new_fragment(struct list_head *frag_info, int offset, int len)
977 struct list_head *lh;
978 struct fragment_info *fi, *fi2, *new;
980 list_for_each(lh, frag_info) {
981 fi = list_entry(lh, struct fragment_info, list);
982 if ((fi->offset + fi->len) == offset) {
983 /* The new fragment can be tacked on to the end */
985 /* Did the new fragment plug a hole? */
986 fi2 = list_entry(lh->next, struct fragment_info, list);
987 if ((fi->offset + fi->len) == fi2->offset) {
988 /* glue fragments together */
994 } else if ((offset + len) == fi->offset) {
995 /* The new fragment can be tacked on to the beginning */
998 /* Did the new fragment plug a hole? */
999 fi2 = list_entry(lh->prev, struct fragment_info, list);
1000 if ((fi2->offset + fi2->len) == fi->offset) {
1001 /* glue fragments together */
1002 fi2->len += fi->len;
1007 } else if (offset > (fi->offset + fi->len)) {
1009 } else if ((offset + len) < fi->offset) {
1015 new = kmalloc(sizeof(*new), GFP_ATOMIC);
1019 new->offset = offset;
1022 list_add(&new->list, lh);
1027 static inline int new_partial_datagram(struct net_device *dev,
1028 struct list_head *pdgl, int dgl,
1029 int dg_size, char *frag_buf,
1030 int frag_off, int frag_len)
1032 struct partial_datagram *new;
1034 new = kmalloc(sizeof(*new), GFP_ATOMIC);
1038 INIT_LIST_HEAD(&new->frag_info);
1040 if (new_fragment(&new->frag_info, frag_off, frag_len) < 0) {
1046 new->dg_size = dg_size;
1048 new->skb = dev_alloc_skb(dg_size + dev->hard_header_len + 15);
1050 struct fragment_info *fi = list_entry(new->frag_info.next,
1051 struct fragment_info,
1058 skb_reserve(new->skb, (dev->hard_header_len + 15) & ~15);
1059 new->pbuf = skb_put(new->skb, dg_size);
1060 memcpy(new->pbuf + frag_off, frag_buf, frag_len);
1062 list_add(&new->list, pdgl);
1067 static inline int update_partial_datagram(struct list_head *pdgl, struct list_head *lh,
1068 char *frag_buf, int frag_off, int frag_len)
1070 struct partial_datagram *pd = list_entry(lh, struct partial_datagram, list);
1072 if (new_fragment(&pd->frag_info, frag_off, frag_len) < 0) {
1076 memcpy(pd->pbuf + frag_off, frag_buf, frag_len);
1078 /* Move list entry to beginnig of list so that oldest partial
1079 * datagrams percolate to the end of the list */
1086 static inline int is_datagram_complete(struct list_head *lh, int dg_size)
1088 struct partial_datagram *pd = list_entry(lh, struct partial_datagram, list);
1089 struct fragment_info *fi = list_entry(pd->frag_info.next,
1090 struct fragment_info, list);
1092 return (fi->len == dg_size);
1095 /* Packet reception. We convert the IP1394 encapsulation header to an
1096 * ethernet header, and fill it with some of our other fields. This is
1097 * an incoming packet from the 1394 bus. */
1098 static int ether1394_data_handler(struct net_device *dev, int srcid, int destid,
1101 struct sk_buff *skb;
1102 unsigned long flags;
1103 struct eth1394_priv *priv = netdev_priv(dev);
1104 union eth1394_hdr *hdr = (union eth1394_hdr *)buf;
1105 u16 ether_type = 0; /* initialized to clear warning */
1107 struct unit_directory *ud = priv->ud_list[NODEID_TO_NODE(srcid)];
1108 struct eth1394_node_info *node_info;
1111 struct eth1394_node_ref *node;
1112 node = eth1394_find_node_nodeid(&priv->ip_node_list, srcid);
1114 HPSB_PRINT(KERN_ERR, "ether1394 rx: sender nodeid "
1115 "lookup failure: " NODE_BUS_FMT,
1116 NODE_BUS_ARGS(priv->host, srcid));
1117 priv->stats.rx_dropped++;
1122 priv->ud_list[NODEID_TO_NODE(srcid)] = ud;
1125 node_info = (struct eth1394_node_info*)ud->device.driver_data;
1127 /* First, did we receive a fragmented or unfragmented datagram? */
1128 hdr->words.word1 = ntohs(hdr->words.word1);
1130 hdr_len = hdr_type_len[hdr->common.lf];
1132 if (hdr->common.lf == ETH1394_HDR_LF_UF) {
1133 /* An unfragmented datagram has been received by the ieee1394
1134 * bus. Build an skbuff around it so we can pass it to the
1135 * high level network layer. */
1137 skb = dev_alloc_skb(len + dev->hard_header_len + 15);
1139 HPSB_PRINT (KERN_ERR, "ether1394 rx: low on mem\n");
1140 priv->stats.rx_dropped++;
1143 skb_reserve(skb, (dev->hard_header_len + 15) & ~15);
1144 memcpy(skb_put(skb, len - hdr_len), buf + hdr_len, len - hdr_len);
1145 ether_type = hdr->uf.ether_type;
1147 /* A datagram fragment has been received, now the fun begins. */
1149 struct list_head *pdgl, *lh;
1150 struct partial_datagram *pd;
1152 int fg_len = len - hdr_len;
1156 struct pdg_list *pdg = &(node_info->pdg);
1158 hdr->words.word3 = ntohs(hdr->words.word3);
1159 /* The 4th header word is reserved so no need to do ntohs() */
1161 if (hdr->common.lf == ETH1394_HDR_LF_FF) {
1162 ether_type = hdr->ff.ether_type;
1164 dg_size = hdr->ff.dg_size + 1;
1167 hdr->words.word2 = ntohs(hdr->words.word2);
1169 dg_size = hdr->sf.dg_size + 1;
1170 fg_off = hdr->sf.fg_off;
1172 spin_lock_irqsave(&pdg->lock, flags);
1174 pdgl = &(pdg->list);
1175 lh = find_partial_datagram(pdgl, dgl);
1178 while (pdg->sz >= max_partial_datagrams) {
1179 /* remove the oldest */
1180 purge_partial_datagram(pdgl->prev);
1184 retval = new_partial_datagram(dev, pdgl, dgl, dg_size,
1185 buf + hdr_len, fg_off,
1188 spin_unlock_irqrestore(&pdg->lock, flags);
1192 lh = find_partial_datagram(pdgl, dgl);
1194 struct partial_datagram *pd;
1196 pd = list_entry(lh, struct partial_datagram, list);
1198 if (fragment_overlap(&pd->frag_info, fg_off, fg_len)) {
1199 /* Overlapping fragments, obliterate old
1200 * datagram and start new one. */
1201 purge_partial_datagram(lh);
1202 retval = new_partial_datagram(dev, pdgl, dgl,
1208 spin_unlock_irqrestore(&pdg->lock, flags);
1212 retval = update_partial_datagram(pdgl, lh,
1216 /* Couldn't save off fragment anyway
1217 * so might as well obliterate the
1219 purge_partial_datagram(lh);
1221 spin_unlock_irqrestore(&pdg->lock, flags);
1224 } /* fragment overlap */
1225 } /* new datagram or add to existing one */
1227 pd = list_entry(lh, struct partial_datagram, list);
1229 if (hdr->common.lf == ETH1394_HDR_LF_FF) {
1230 pd->ether_type = ether_type;
1233 if (is_datagram_complete(lh, dg_size)) {
1234 ether_type = pd->ether_type;
1236 skb = skb_get(pd->skb);
1237 purge_partial_datagram(lh);
1238 spin_unlock_irqrestore(&pdg->lock, flags);
1240 /* Datagram is not complete, we're done for the
1242 spin_unlock_irqrestore(&pdg->lock, flags);
1245 } /* unframgented datagram or fragmented one */
1247 /* Write metadata, and then pass to the receive level */
1249 skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */
1251 /* Parse the encapsulation header. This actually does the job of
1252 * converting to an ethernet frame header, aswell as arp
1253 * conversion if needed. ARP conversion is easier in this
1254 * direction, since we are using ethernet as our backend. */
1255 skb->protocol = ether1394_parse_encap(skb, dev, srcid, destid,
1259 spin_lock_irqsave(&priv->lock, flags);
1260 if (!skb->protocol) {
1261 priv->stats.rx_errors++;
1262 priv->stats.rx_dropped++;
1263 dev_kfree_skb_any(skb);
1267 if (netif_rx(skb) == NET_RX_DROP) {
1268 priv->stats.rx_errors++;
1269 priv->stats.rx_dropped++;
1274 priv->stats.rx_packets++;
1275 priv->stats.rx_bytes += skb->len;
1278 if (netif_queue_stopped(dev))
1279 netif_wake_queue(dev);
1280 spin_unlock_irqrestore(&priv->lock, flags);
1282 dev->last_rx = jiffies;
1287 static int ether1394_write(struct hpsb_host *host, int srcid, int destid,
1288 quadlet_t *data, u64 addr, size_t len, u16 flags)
1290 struct eth1394_host_info *hi;
1292 hi = hpsb_get_hostinfo(ð1394_highlevel, host);
1294 ETH1394_PRINT_G(KERN_ERR, "Could not find net device for host %s\n",
1295 host->driver->name);
1296 return RCODE_ADDRESS_ERROR;
1299 if (ether1394_data_handler(hi->dev, srcid, destid, (char*)data, len))
1300 return RCODE_ADDRESS_ERROR;
1302 return RCODE_COMPLETE;
1305 static void ether1394_iso(struct hpsb_iso *iso)
1309 struct eth1394_host_info *hi;
1310 struct net_device *dev;
1311 struct eth1394_priv *priv;
1318 hi = hpsb_get_hostinfo(ð1394_highlevel, iso->host);
1320 ETH1394_PRINT_G(KERN_ERR, "Could not find net device for host %s\n",
1321 iso->host->driver->name);
1327 nready = hpsb_iso_n_ready(iso);
1328 for (i = 0; i < nready; i++) {
1329 struct hpsb_iso_packet_info *info =
1330 &iso->infos[(iso->first_packet + i) % iso->buf_packets];
1331 data = (quadlet_t*) (iso->data_buf.kvirt + info->offset);
1333 /* skip over GASP header */
1334 buf = (char *)data + 8;
1335 len = info->len - 8;
1337 specifier_id = (((be32_to_cpu(data[0]) & 0xffff) << 8) |
1338 ((be32_to_cpu(data[1]) & 0xff000000) >> 24));
1339 source_id = be32_to_cpu(data[0]) >> 16;
1341 priv = netdev_priv(dev);
1343 if (info->channel != (iso->host->csr.broadcast_channel & 0x3f) ||
1344 specifier_id != ETHER1394_GASP_SPECIFIER_ID) {
1345 /* This packet is not for us */
1348 ether1394_data_handler(dev, source_id, LOCAL_BUS | ALL_NODES,
1352 hpsb_iso_recv_release_packets(iso, i);
1354 dev->last_rx = jiffies;
1357 /******************************************
1358 * Datagram transmission code
1359 ******************************************/
1361 /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire
1362 * arphdr) is the same format as the ip1394 header, so they overlap. The rest
1363 * needs to be munged a bit. The remainder of the arphdr is formatted based
1364 * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to
1367 * Now that the EUI is used for the hardware address all we need to do to make
1368 * this work for 1394 is to insert 2 quadlets that contain max_rec size,
1369 * speed, and unicast FIFO address information between the sender_unique_id
1370 * and the IP addresses.
1372 static inline void ether1394_arp_to_1394arp(struct sk_buff *skb,
1373 struct net_device *dev)
1375 struct eth1394_priv *priv = netdev_priv(dev);
1377 struct arphdr *arp = (struct arphdr *)skb->data;
1378 unsigned char *arp_ptr = (unsigned char *)(arp + 1);
1379 struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data;
1381 /* Believe it or not, all that need to happen is sender IP get moved
1382 * and set hw_addr_len, max_rec, sspd, fifo_hi and fifo_lo. */
1383 arp1394->hw_addr_len = 16;
1384 arp1394->sip = *(u32*)(arp_ptr + ETH1394_ALEN);
1385 arp1394->max_rec = priv->host->csr.max_rec;
1386 arp1394->sspd = priv->host->csr.lnk_spd;
1387 arp1394->fifo_hi = htons (priv->local_fifo >> 32);
1388 arp1394->fifo_lo = htonl (priv->local_fifo & ~0x0);
1393 /* We need to encapsulate the standard header with our own. We use the
1394 * ethernet header's proto for our own. */
1395 static inline unsigned int ether1394_encapsulate_prep(unsigned int max_payload,
1397 union eth1394_hdr *hdr,
1398 u16 dg_size, u16 dgl)
1400 unsigned int adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_UF];
1402 /* Does it all fit in one packet? */
1403 if (dg_size <= adj_max_payload) {
1404 hdr->uf.lf = ETH1394_HDR_LF_UF;
1405 hdr->uf.ether_type = proto;
1407 hdr->ff.lf = ETH1394_HDR_LF_FF;
1408 hdr->ff.ether_type = proto;
1409 hdr->ff.dg_size = dg_size - 1;
1411 adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_FF];
1413 return((dg_size + (adj_max_payload - 1)) / adj_max_payload);
1416 static inline unsigned int ether1394_encapsulate(struct sk_buff *skb,
1417 unsigned int max_payload,
1418 union eth1394_hdr *hdr)
1420 union eth1394_hdr *bufhdr;
1421 int ftype = hdr->common.lf;
1422 int hdrsz = hdr_type_len[ftype];
1423 unsigned int adj_max_payload = max_payload - hdrsz;
1426 case ETH1394_HDR_LF_UF:
1427 bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz);
1428 bufhdr->words.word1 = htons(hdr->words.word1);
1429 bufhdr->words.word2 = hdr->words.word2;
1432 case ETH1394_HDR_LF_FF:
1433 bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz);
1434 bufhdr->words.word1 = htons(hdr->words.word1);
1435 bufhdr->words.word2 = hdr->words.word2;
1436 bufhdr->words.word3 = htons(hdr->words.word3);
1437 bufhdr->words.word4 = 0;
1439 /* Set frag type here for future interior fragments */
1440 hdr->common.lf = ETH1394_HDR_LF_IF;
1445 hdr->sf.fg_off += adj_max_payload;
1446 bufhdr = (union eth1394_hdr *)skb_pull(skb, adj_max_payload);
1447 if (max_payload >= skb->len)
1448 hdr->common.lf = ETH1394_HDR_LF_LF;
1449 bufhdr->words.word1 = htons(hdr->words.word1);
1450 bufhdr->words.word2 = htons(hdr->words.word2);
1451 bufhdr->words.word3 = htons(hdr->words.word3);
1452 bufhdr->words.word4 = 0;
1455 return min(max_payload, skb->len);
1458 static inline struct hpsb_packet *ether1394_alloc_common_packet(struct hpsb_host *host)
1460 struct hpsb_packet *p;
1462 p = hpsb_alloc_packet(0);
1465 p->generation = get_hpsb_generation(host);
1466 p->type = hpsb_async;
1471 static inline int ether1394_prep_write_packet(struct hpsb_packet *p,
1472 struct hpsb_host *host,
1473 nodeid_t node, u64 addr,
1474 void * data, int tx_len)
1479 p->tcode = TCODE_WRITEB;
1480 p->header[1] = (host->node_id << 16) | (addr >> 32);
1481 p->header[2] = addr & 0xffffffff;
1483 p->header_size = 16;
1484 p->expect_response = 1;
1486 if (hpsb_get_tlabel(p)) {
1487 ETH1394_PRINT_G(KERN_ERR, "No more tlabels left while sending "
1488 "to node " NODE_BUS_FMT "\n", NODE_BUS_ARGS(host, node));
1491 p->header[0] = (p->node_id << 16) | (p->tlabel << 10)
1492 | (1 << 8) | (TCODE_WRITEB << 4);
1494 p->header[3] = tx_len << 16;
1495 p->data_size = (tx_len + 3) & ~3;
1496 p->data = (quadlet_t*)data;
1501 static inline void ether1394_prep_gasp_packet(struct hpsb_packet *p,
1502 struct eth1394_priv *priv,
1503 struct sk_buff *skb, int length)
1506 p->tcode = TCODE_STREAM_DATA;
1508 p->header[0] = (length << 16) | (3 << 14)
1509 | ((priv->broadcast_channel) << 8)
1510 | (TCODE_STREAM_DATA << 4);
1511 p->data_size = length;
1512 p->data = ((quadlet_t*)skb->data) - 2;
1513 p->data[0] = cpu_to_be32((priv->host->node_id << 16) |
1514 ETHER1394_GASP_SPECIFIER_ID_HI);
1515 p->data[1] = __constant_cpu_to_be32((ETHER1394_GASP_SPECIFIER_ID_LO << 24) |
1516 ETHER1394_GASP_VERSION);
1518 /* Setting the node id to ALL_NODES (not LOCAL_BUS | ALL_NODES)
1519 * prevents hpsb_send_packet() from setting the speed to an arbitrary
1520 * value based on packet->node_id if packet->node_id is not set. */
1521 p->node_id = ALL_NODES;
1522 p->speed_code = priv->bc_sspd;
1525 static inline void ether1394_free_packet(struct hpsb_packet *packet)
1527 if (packet->tcode != TCODE_STREAM_DATA)
1528 hpsb_free_tlabel(packet);
1529 hpsb_free_packet(packet);
1532 static void ether1394_complete_cb(void *__ptask);
1534 static int ether1394_send_packet(struct packet_task *ptask, unsigned int tx_len)
1536 struct eth1394_priv *priv = ptask->priv;
1537 struct hpsb_packet *packet = NULL;
1539 packet = ether1394_alloc_common_packet(priv->host);
1543 if (ptask->tx_type == ETH1394_GASP) {
1544 int length = tx_len + (2 * sizeof(quadlet_t));
1546 ether1394_prep_gasp_packet(packet, priv, ptask->skb, length);
1547 } else if (ether1394_prep_write_packet(packet, priv->host,
1549 ptask->addr, ptask->skb->data,
1551 hpsb_free_packet(packet);
1555 ptask->packet = packet;
1556 hpsb_set_packet_complete_task(ptask->packet, ether1394_complete_cb,
1559 if (hpsb_send_packet(packet) < 0) {
1560 ether1394_free_packet(packet);
1568 /* Task function to be run when a datagram transmission is completed */
1569 static inline void ether1394_dg_complete(struct packet_task *ptask, int fail)
1571 struct sk_buff *skb = ptask->skb;
1572 struct net_device *dev = skb->dev;
1573 struct eth1394_priv *priv = netdev_priv(dev);
1574 unsigned long flags;
1577 spin_lock_irqsave(&priv->lock, flags);
1579 priv->stats.tx_dropped++;
1580 priv->stats.tx_errors++;
1582 priv->stats.tx_bytes += skb->len;
1583 priv->stats.tx_packets++;
1585 spin_unlock_irqrestore(&priv->lock, flags);
1587 dev_kfree_skb_any(skb);
1588 kmem_cache_free(packet_task_cache, ptask);
1592 /* Callback for when a packet has been sent and the status of that packet is
1594 static void ether1394_complete_cb(void *__ptask)
1596 struct packet_task *ptask = (struct packet_task *)__ptask;
1597 struct hpsb_packet *packet = ptask->packet;
1600 if (packet->tcode != TCODE_STREAM_DATA)
1601 fail = hpsb_packet_success(packet);
1603 ether1394_free_packet(packet);
1605 ptask->outstanding_pkts--;
1606 if (ptask->outstanding_pkts > 0 && !fail) {
1609 /* Add the encapsulation header to the fragment */
1610 tx_len = ether1394_encapsulate(ptask->skb, ptask->max_payload,
1612 if (ether1394_send_packet(ptask, tx_len))
1613 ether1394_dg_complete(ptask, 1);
1615 ether1394_dg_complete(ptask, fail);
1621 /* Transmit a packet (called by kernel) */
1622 static int ether1394_tx (struct sk_buff *skb, struct net_device *dev)
1624 gfp_t kmflags = in_interrupt() ? GFP_ATOMIC : GFP_KERNEL;
1625 struct eth1394hdr *eth;
1626 struct eth1394_priv *priv = netdev_priv(dev);
1628 unsigned long flags;
1630 eth1394_tx_type tx_type;
1632 unsigned int tx_len;
1633 unsigned int max_payload;
1636 struct packet_task *ptask;
1637 struct eth1394_node_ref *node;
1638 struct eth1394_node_info *node_info = NULL;
1640 ptask = kmem_cache_alloc(packet_task_cache, kmflags);
1641 if (ptask == NULL) {
1646 /* XXX Ignore this for now. Noticed that when MacOSX is the IRM,
1647 * it does not set our validity bit. We need to compensate for
1648 * that somewhere else, but not in eth1394. */
1650 if ((priv->host->csr.broadcast_channel & 0xc0000000) != 0xc0000000) {
1656 if ((skb = skb_share_check (skb, kmflags)) == NULL) {
1661 /* Get rid of the fake eth1394 header, but save a pointer */
1662 eth = (struct eth1394hdr*)skb->data;
1663 skb_pull(skb, ETH1394_HLEN);
1665 proto = eth->h_proto;
1668 /* Set the transmission type for the packet. ARP packets and IP
1669 * broadcast packets are sent via GASP. */
1670 if (memcmp(eth->h_dest, dev->broadcast, ETH1394_ALEN) == 0 ||
1671 proto == __constant_htons(ETH_P_ARP) ||
1672 (proto == __constant_htons(ETH_P_IP) &&
1673 IN_MULTICAST(__constant_ntohl(skb->nh.iph->daddr)))) {
1674 tx_type = ETH1394_GASP;
1675 dest_node = LOCAL_BUS | ALL_NODES;
1676 max_payload = priv->bc_maxpayload - ETHER1394_GASP_OVERHEAD;
1677 BUG_ON(max_payload < (512 - ETHER1394_GASP_OVERHEAD));
1679 if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF])
1682 node = eth1394_find_node_guid(&priv->ip_node_list,
1683 be64_to_cpu(*(u64*)eth->h_dest));
1688 node_info = (struct eth1394_node_info*)node->ud->device.driver_data;
1689 if (node_info->fifo == ETHER1394_INVALID_ADDR) {
1694 dest_node = node->ud->ne->nodeid;
1695 max_payload = node_info->maxpayload;
1696 BUG_ON(max_payload < (512 - ETHER1394_GASP_OVERHEAD));
1698 dgl = node_info->dgl;
1699 if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF])
1701 tx_type = ETH1394_WRREQ;
1704 /* If this is an ARP packet, convert it */
1705 if (proto == __constant_htons (ETH_P_ARP))
1706 ether1394_arp_to_1394arp (skb, dev);
1708 ptask->hdr.words.word1 = 0;
1709 ptask->hdr.words.word2 = 0;
1710 ptask->hdr.words.word3 = 0;
1711 ptask->hdr.words.word4 = 0;
1714 ptask->tx_type = tx_type;
1716 if (tx_type != ETH1394_GASP) {
1719 spin_lock_irqsave(&priv->lock, flags);
1720 addr = node_info->fifo;
1721 spin_unlock_irqrestore(&priv->lock, flags);
1724 ptask->dest_node = dest_node;
1727 ptask->tx_type = tx_type;
1728 ptask->max_payload = max_payload;
1729 ptask->outstanding_pkts = ether1394_encapsulate_prep(max_payload, proto,
1730 &ptask->hdr, dg_size,
1733 /* Add the encapsulation header to the fragment */
1734 tx_len = ether1394_encapsulate(skb, max_payload, &ptask->hdr);
1735 dev->trans_start = jiffies;
1736 if (ether1394_send_packet(ptask, tx_len))
1739 netif_wake_queue(dev);
1743 kmem_cache_free(packet_task_cache, ptask);
1748 spin_lock_irqsave (&priv->lock, flags);
1749 priv->stats.tx_dropped++;
1750 priv->stats.tx_errors++;
1751 spin_unlock_irqrestore (&priv->lock, flags);
1753 if (netif_queue_stopped(dev))
1754 netif_wake_queue(dev);
1756 return 0; /* returning non-zero causes serious problems */
1759 static void ether1394_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1761 strcpy (info->driver, driver_name);
1762 /* FIXME XXX provide sane businfo */
1763 strcpy (info->bus_info, "ieee1394");
1766 static struct ethtool_ops ethtool_ops = {
1767 .get_drvinfo = ether1394_get_drvinfo
1770 static int __init ether1394_init_module (void)
1772 packet_task_cache = kmem_cache_create("packet_task", sizeof(struct packet_task),
1775 /* Register ourselves as a highlevel driver */
1776 hpsb_register_highlevel(ð1394_highlevel);
1778 return hpsb_register_protocol(ð1394_proto_driver);
1781 static void __exit ether1394_exit_module (void)
1783 hpsb_unregister_protocol(ð1394_proto_driver);
1784 hpsb_unregister_highlevel(ð1394_highlevel);
1785 kmem_cache_destroy(packet_task_cache);
1788 module_init(ether1394_init_module);
1789 module_exit(ether1394_exit_module);