2 * eth1394.c -- IPv4 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.
26 * This driver intends to support RFC 2734, which describes a method for
27 * transporting IPv4 datagrams over IEEE-1394 serial busses.
31 * - Add MCAP. Limited Multicast exists only to 224.0.0.1 and 224.0.0.2.
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
42 #include <linux/module.h>
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>
51 #include <linux/netdevice.h>
52 #include <linux/inetdevice.h>
53 #include <linux/etherdevice.h>
54 #include <linux/if_arp.h>
55 #include <linux/if_ether.h>
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>
67 #include "config_roms.h"
70 #include "highlevel.h"
72 #include "ieee1394_core.h"
73 #include "ieee1394_hotplug.h"
74 #include "ieee1394_transactions.h"
75 #include "ieee1394_types.h"
79 #define ETH1394_PRINT_G(level, fmt, args...) \
80 printk(level "%s: " fmt, driver_name, ## args)
82 #define ETH1394_PRINT(level, dev_name, fmt, args...) \
83 printk(level "%s: %s: " fmt, driver_name, dev_name, ## args)
85 struct fragment_info {
86 struct list_head list;
91 struct partial_datagram {
92 struct list_head list;
98 struct list_head frag_info;
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 */
107 struct eth1394_host_info {
108 struct hpsb_host *host;
109 struct net_device *dev;
112 struct eth1394_node_ref {
113 struct unit_directory *ud;
114 struct list_head list;
117 struct 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 */
125 static const char driver_name[] = "eth1394";
127 static struct kmem_cache *packet_task_cache;
129 static struct hpsb_highlevel eth1394_highlevel;
131 /* Use common.lf to determine header len */
132 static 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)
139 /* For now, this needs to be 1500, so that XP works with us */
140 #define ETH1394_DATA_LEN ETH_DATA_LEN
142 static const u16 eth1394_speedto_maxpayload[] = {
143 /* S100, S200, S400, S800, S1600, S3200 */
144 512, 1024, 2048, 4096, 4096, 4096
147 MODULE_AUTHOR("Ben Collins (bcollins@debian.org)");
148 MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)");
149 MODULE_LICENSE("GPL");
152 * The max_partial_datagrams parameter is the maximum number of fragmented
153 * datagrams per node that eth1394 will keep in memory. Providing an upper
154 * bound allows us to limit the amount of memory that partial datagrams
155 * consume in the event that some partial datagrams are never completed.
157 static int max_partial_datagrams = 25;
158 module_param(max_partial_datagrams, int, S_IRUGO | S_IWUSR);
159 MODULE_PARM_DESC(max_partial_datagrams,
160 "Maximum number of partially received fragmented datagrams "
164 static int ether1394_header(struct sk_buff *skb, struct net_device *dev,
165 unsigned short type, void *daddr, void *saddr,
167 static int ether1394_rebuild_header(struct sk_buff *skb);
168 static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr);
169 static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh);
170 static void ether1394_header_cache_update(struct hh_cache *hh,
171 struct net_device *dev,
172 unsigned char *haddr);
173 static int ether1394_mac_addr(struct net_device *dev, void *p);
175 static int ether1394_tx(struct sk_buff *skb, struct net_device *dev);
176 static void ether1394_iso(struct hpsb_iso *iso);
178 static struct ethtool_ops ethtool_ops;
180 static int ether1394_write(struct hpsb_host *host, int srcid, int destid,
181 quadlet_t *data, u64 addr, size_t len, u16 flags);
182 static void ether1394_add_host(struct hpsb_host *host);
183 static void ether1394_remove_host(struct hpsb_host *host);
184 static void ether1394_host_reset(struct hpsb_host *host);
186 /* Function for incoming 1394 packets */
187 static struct hpsb_address_ops addr_ops = {
188 .write = ether1394_write,
191 /* Ieee1394 highlevel driver functions */
192 static struct hpsb_highlevel eth1394_highlevel = {
194 .add_host = ether1394_add_host,
195 .remove_host = ether1394_remove_host,
196 .host_reset = ether1394_host_reset,
199 static int ether1394_recv_init(struct eth1394_priv *priv)
201 unsigned int iso_buf_size;
203 /* FIXME: rawiso limits us to PAGE_SIZE */
204 iso_buf_size = min((unsigned int)PAGE_SIZE,
205 2 * (1U << (priv->host->csr.max_rec + 1)));
207 priv->iso = hpsb_iso_recv_init(priv->host,
208 ETHER1394_GASP_BUFFERS * iso_buf_size,
209 ETHER1394_GASP_BUFFERS,
210 priv->broadcast_channel,
211 HPSB_ISO_DMA_PACKET_PER_BUFFER,
213 if (priv->iso == NULL) {
214 ETH1394_PRINT_G(KERN_ERR, "Failed to allocate IR context\n");
215 priv->bc_state = ETHER1394_BC_ERROR;
219 if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0)
220 priv->bc_state = ETHER1394_BC_STOPPED;
222 priv->bc_state = ETHER1394_BC_RUNNING;
226 /* This is called after an "ifup" */
227 static int ether1394_open(struct net_device *dev)
229 struct eth1394_priv *priv = netdev_priv(dev);
232 if (priv->bc_state == ETHER1394_BC_ERROR) {
233 ret = ether1394_recv_init(priv);
237 netif_start_queue(dev);
241 /* This is called after an "ifdown" */
242 static int ether1394_stop(struct net_device *dev)
244 netif_stop_queue(dev);
248 /* Return statistics to the caller */
249 static struct net_device_stats *ether1394_stats(struct net_device *dev)
251 return &(((struct eth1394_priv *)netdev_priv(dev))->stats);
254 /* FIXME: What to do if we timeout? I think a host reset is probably in order,
255 * so that's what we do. Should we increment the stat counters too? */
256 static void ether1394_tx_timeout(struct net_device *dev)
258 struct hpsb_host *host =
259 ((struct eth1394_priv *)netdev_priv(dev))->host;
261 ETH1394_PRINT(KERN_ERR, dev->name, "Timeout, resetting host\n");
262 ether1394_host_reset(host);
265 static int ether1394_change_mtu(struct net_device *dev, int new_mtu)
268 ((struct eth1394_priv *)netdev_priv(dev))->host->csr.max_rec;
271 new_mtu > ETH1394_DATA_LEN ||
272 new_mtu > (1 << (max_rec + 1)) - sizeof(union eth1394_hdr) -
273 ETHER1394_GASP_OVERHEAD)
280 static void purge_partial_datagram(struct list_head *old)
282 struct partial_datagram *pd;
283 struct list_head *lh, *n;
284 struct fragment_info *fi;
286 pd = list_entry(old, struct partial_datagram, list);
288 list_for_each_safe(lh, n, &pd->frag_info) {
289 fi = list_entry(lh, struct fragment_info, list);
298 /******************************************
299 * 1394 bus activity functions
300 ******************************************/
302 static struct eth1394_node_ref *eth1394_find_node(struct list_head *inl,
303 struct unit_directory *ud)
305 struct eth1394_node_ref *node;
307 list_for_each_entry(node, inl, list)
314 static struct eth1394_node_ref *eth1394_find_node_guid(struct list_head *inl,
317 struct eth1394_node_ref *node;
319 list_for_each_entry(node, inl, list)
320 if (node->ud->ne->guid == guid)
326 static struct eth1394_node_ref *eth1394_find_node_nodeid(struct list_head *inl,
329 struct eth1394_node_ref *node;
331 list_for_each_entry(node, inl, list)
332 if (node->ud->ne->nodeid == nodeid)
338 static int eth1394_new_node(struct eth1394_host_info *hi,
339 struct unit_directory *ud)
341 struct eth1394_priv *priv;
342 struct eth1394_node_ref *new_node;
343 struct eth1394_node_info *node_info;
345 new_node = kmalloc(sizeof(*new_node), GFP_KERNEL);
349 node_info = kmalloc(sizeof(*node_info), GFP_KERNEL);
355 spin_lock_init(&node_info->pdg.lock);
356 INIT_LIST_HEAD(&node_info->pdg.list);
357 node_info->pdg.sz = 0;
358 node_info->fifo = CSR1212_INVALID_ADDR_SPACE;
360 ud->device.driver_data = node_info;
363 priv = netdev_priv(hi->dev);
364 list_add_tail(&new_node->list, &priv->ip_node_list);
368 static int eth1394_probe(struct device *dev)
370 struct unit_directory *ud;
371 struct eth1394_host_info *hi;
373 ud = container_of(dev, struct unit_directory, device);
374 hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host);
378 return eth1394_new_node(hi, ud);
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);
402 list_del(&old_node->list);
405 node_info = (struct eth1394_node_info*)ud->device.driver_data;
407 spin_lock_irqsave(&node_info->pdg.lock, flags);
408 /* The partial datagram list should be empty, but we'll just
409 * make sure anyway... */
410 list_for_each_safe(lh, n, &node_info->pdg.list)
411 purge_partial_datagram(lh);
412 spin_unlock_irqrestore(&node_info->pdg.lock, flags);
415 ud->device.driver_data = NULL;
419 static int eth1394_update(struct unit_directory *ud)
421 struct eth1394_host_info *hi;
422 struct eth1394_priv *priv;
423 struct eth1394_node_ref *node;
425 hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host);
429 priv = netdev_priv(hi->dev);
430 node = eth1394_find_node(&priv->ip_node_list, ud);
434 return eth1394_new_node(hi, ud);
437 static struct ieee1394_device_id eth1394_id_table[] = {
439 .match_flags = (IEEE1394_MATCH_SPECIFIER_ID |
440 IEEE1394_MATCH_VERSION),
441 .specifier_id = ETHER1394_GASP_SPECIFIER_ID,
442 .version = ETHER1394_GASP_VERSION,
447 MODULE_DEVICE_TABLE(ieee1394, eth1394_id_table);
449 static struct hpsb_protocol_driver eth1394_proto_driver = {
451 .id_table = eth1394_id_table,
452 .update = eth1394_update,
454 .probe = eth1394_probe,
455 .remove = eth1394_remove,
459 static void ether1394_reset_priv(struct net_device *dev, int set_mtu)
463 struct eth1394_priv *priv = netdev_priv(dev);
464 struct hpsb_host *host = priv->host;
465 u64 guid = get_unaligned((u64 *)&(host->csr.rom->bus_info_data[3]));
466 int max_speed = IEEE1394_SPEED_MAX;
468 spin_lock_irqsave(&priv->lock, flags);
470 memset(priv->ud_list, 0, sizeof(priv->ud_list));
471 priv->bc_maxpayload = 512;
473 /* Determine speed limit */
474 for (i = 0; i < host->node_count; i++)
475 if (max_speed > host->speed[i])
476 max_speed = host->speed[i];
477 priv->bc_sspd = max_speed;
479 /* We'll use our maximum payload as the default MTU */
481 int max_payload = 1 << (host->csr.max_rec + 1);
483 dev->mtu = min(ETH1394_DATA_LEN,
484 (int)(max_payload - sizeof(union eth1394_hdr) -
485 ETHER1394_GASP_OVERHEAD));
487 /* Set our hardware address while we're at it */
488 memcpy(dev->dev_addr, &guid, sizeof(u64));
489 memset(dev->broadcast, 0xff, sizeof(u64));
492 spin_unlock_irqrestore(&priv->lock, flags);
495 /* This function is called right before register_netdev */
496 static void ether1394_init_dev(struct net_device *dev)
499 dev->open = ether1394_open;
500 dev->stop = ether1394_stop;
501 dev->hard_start_xmit = ether1394_tx;
502 dev->get_stats = ether1394_stats;
503 dev->tx_timeout = ether1394_tx_timeout;
504 dev->change_mtu = ether1394_change_mtu;
506 dev->hard_header = ether1394_header;
507 dev->rebuild_header = ether1394_rebuild_header;
508 dev->hard_header_cache = ether1394_header_cache;
509 dev->header_cache_update= ether1394_header_cache_update;
510 dev->hard_header_parse = ether1394_header_parse;
511 dev->set_mac_address = ether1394_mac_addr;
512 SET_ETHTOOL_OPS(dev, ðtool_ops);
515 dev->watchdog_timeo = ETHER1394_TIMEOUT;
516 dev->flags = IFF_BROADCAST | IFF_MULTICAST;
517 dev->features = NETIF_F_HIGHDMA;
518 dev->addr_len = ETH1394_ALEN;
519 dev->hard_header_len = ETH1394_HLEN;
520 dev->type = ARPHRD_IEEE1394;
522 ether1394_reset_priv(dev, 1);
526 * This function is called every time a card is found. It is generally called
527 * when the module is installed. This is where we add all of our ethernet
528 * devices. One for each host.
530 static void ether1394_add_host(struct hpsb_host *host)
532 struct eth1394_host_info *hi = NULL;
533 struct net_device *dev = NULL;
534 struct eth1394_priv *priv;
537 if (hpsb_config_rom_ip1394_add(host) != 0) {
538 ETH1394_PRINT_G(KERN_ERR, "Can't add IP-over-1394 ROM entry\n");
542 fifo_addr = hpsb_allocate_and_register_addrspace(
543 ð1394_highlevel, host, &addr_ops,
544 ETHER1394_REGION_ADDR_LEN, ETHER1394_REGION_ADDR_LEN,
545 CSR1212_INVALID_ADDR_SPACE, CSR1212_INVALID_ADDR_SPACE);
546 if (fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
547 ETH1394_PRINT_G(KERN_ERR, "Cannot register CSR space\n");
548 hpsb_config_rom_ip1394_remove(host);
552 /* We should really have our own alloc_hpsbdev() function in
553 * net_init.c instead of calling the one for ethernet then hijacking
554 * it for ourselves. That way we'd be a real networking device. */
555 dev = alloc_etherdev(sizeof (struct eth1394_priv));
558 ETH1394_PRINT_G(KERN_ERR, "Out of memory\n");
562 SET_MODULE_OWNER(dev);
564 /* FIXME - Is this the correct parent device anyway? */
565 SET_NETDEV_DEV(dev, &host->device);
568 priv = netdev_priv(dev);
570 INIT_LIST_HEAD(&priv->ip_node_list);
572 spin_lock_init(&priv->lock);
574 priv->local_fifo = fifo_addr;
576 hi = hpsb_create_hostinfo(ð1394_highlevel, host, sizeof(*hi));
579 ETH1394_PRINT_G(KERN_ERR, "Out of memory\n");
583 ether1394_init_dev(dev);
585 if (register_netdev(dev)) {
586 ETH1394_PRINT_G(KERN_ERR, "Cannot register the driver\n");
590 ETH1394_PRINT(KERN_INFO, dev->name, "IPv4 over IEEE 1394 (fw-host%d)\n",
596 /* Ignore validity in hopes that it will be set in the future. It'll
597 * be checked when the eth device is opened. */
598 priv->broadcast_channel = host->csr.broadcast_channel & 0x3f;
600 ether1394_recv_init(priv);
606 hpsb_destroy_hostinfo(ð1394_highlevel, host);
607 hpsb_unregister_addrspace(ð1394_highlevel, host, fifo_addr);
608 hpsb_config_rom_ip1394_remove(host);
611 /* Remove a card from our list */
612 static void ether1394_remove_host(struct hpsb_host *host)
614 struct eth1394_host_info *hi;
615 struct eth1394_priv *priv;
617 hi = hpsb_get_hostinfo(ð1394_highlevel, host);
620 priv = netdev_priv(hi->dev);
621 hpsb_unregister_addrspace(ð1394_highlevel, host, priv->local_fifo);
622 hpsb_config_rom_ip1394_remove(host);
624 hpsb_iso_shutdown(priv->iso);
625 unregister_netdev(hi->dev);
626 free_netdev(hi->dev);
629 /* A bus reset happened */
630 static void ether1394_host_reset(struct hpsb_host *host)
632 struct eth1394_host_info *hi;
633 struct eth1394_priv *priv;
634 struct net_device *dev;
635 struct list_head *lh, *n;
636 struct eth1394_node_ref *node;
637 struct eth1394_node_info *node_info;
640 hi = hpsb_get_hostinfo(ð1394_highlevel, host);
642 /* This can happen for hosts that we don't use */
647 priv = netdev_priv(dev);
649 /* Reset our private host data, but not our MTU */
650 netif_stop_queue(dev);
651 ether1394_reset_priv(dev, 0);
653 list_for_each_entry(node, &priv->ip_node_list, list) {
654 node_info = node->ud->device.driver_data;
656 spin_lock_irqsave(&node_info->pdg.lock, flags);
658 list_for_each_safe(lh, n, &node_info->pdg.list)
659 purge_partial_datagram(lh);
661 INIT_LIST_HEAD(&(node_info->pdg.list));
662 node_info->pdg.sz = 0;
664 spin_unlock_irqrestore(&node_info->pdg.lock, flags);
667 netif_wake_queue(dev);
670 /******************************************
671 * HW Header net device functions
672 ******************************************/
673 /* These functions have been adapted from net/ethernet/eth.c */
675 /* Create a fake MAC header for an arbitrary protocol layer.
676 * saddr=NULL means use device source address
677 * daddr=NULL means leave destination address (eg unresolved arp). */
678 static int ether1394_header(struct sk_buff *skb, struct net_device *dev,
679 unsigned short type, void *daddr, void *saddr,
682 struct eth1394hdr *eth =
683 (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN);
685 eth->h_proto = htons(type);
687 if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
688 memset(eth->h_dest, 0, dev->addr_len);
689 return dev->hard_header_len;
693 memcpy(eth->h_dest, daddr, dev->addr_len);
694 return dev->hard_header_len;
697 return -dev->hard_header_len;
700 /* Rebuild the faked MAC header. This is called after an ARP
701 * (or in future other address resolution) has completed on this
702 * sk_buff. We now let ARP fill in the other fields.
704 * This routine CANNOT use cached dst->neigh!
705 * Really, it is used only when dst->neigh is wrong.
707 static int ether1394_rebuild_header(struct sk_buff *skb)
709 struct eth1394hdr *eth = (struct eth1394hdr *)skb->data;
710 struct net_device *dev = skb->dev;
712 switch (eth->h_proto) {
715 case __constant_htons(ETH_P_IP):
716 return arp_find((unsigned char *)ð->h_dest, skb);
719 ETH1394_PRINT(KERN_DEBUG, dev->name,
720 "unable to resolve type %04x addresses.\n",
721 ntohs(eth->h_proto));
728 static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr)
730 struct net_device *dev = skb->dev;
732 memcpy(haddr, dev->dev_addr, ETH1394_ALEN);
736 static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh)
738 unsigned short type = hh->hh_type;
739 struct net_device *dev = neigh->dev;
740 struct eth1394hdr *eth =
741 (struct eth1394hdr *)((u8 *)hh->hh_data + 16 - ETH1394_HLEN);
743 if (type == htons(ETH_P_802_3))
747 memcpy(eth->h_dest, neigh->ha, dev->addr_len);
749 hh->hh_len = ETH1394_HLEN;
753 /* Called by Address Resolution module to notify changes in address. */
754 static void ether1394_header_cache_update(struct hh_cache *hh,
755 struct net_device *dev,
756 unsigned char * haddr)
758 memcpy((u8 *)hh->hh_data + 16 - ETH1394_HLEN, haddr, dev->addr_len);
761 static int ether1394_mac_addr(struct net_device *dev, void *p)
763 if (netif_running(dev))
766 /* Not going to allow setting the MAC address, we really need to use
767 * the real one supplied by the hardware */
771 /******************************************
772 * Datagram reception code
773 ******************************************/
775 /* Copied from net/ethernet/eth.c */
776 static u16 ether1394_type_trans(struct sk_buff *skb, struct net_device *dev)
778 struct eth1394hdr *eth;
781 skb_reset_mac_header(skb);
782 skb_pull(skb, ETH1394_HLEN);
783 eth = eth1394_hdr(skb);
785 if (*eth->h_dest & 1) {
786 if (memcmp(eth->h_dest, dev->broadcast, dev->addr_len) == 0)
787 skb->pkt_type = PACKET_BROADCAST;
790 skb->pkt_type = PACKET_MULTICAST;
793 if (memcmp(eth->h_dest, dev->dev_addr, dev->addr_len))
794 skb->pkt_type = PACKET_OTHERHOST;
797 if (ntohs(eth->h_proto) >= 1536)
802 if (*(unsigned short *)rawp == 0xFFFF)
803 return htons(ETH_P_802_3);
805 return htons(ETH_P_802_2);
808 /* Parse an encapsulated IP1394 header into an ethernet frame packet.
809 * We also perform ARP translation here, if need be. */
810 static u16 ether1394_parse_encap(struct sk_buff *skb, struct net_device *dev,
811 nodeid_t srcid, nodeid_t destid,
814 struct eth1394_priv *priv = netdev_priv(dev);
816 unsigned short ret = 0;
818 /* Setup our hw addresses. We use these to build the ethernet header. */
819 if (destid == (LOCAL_BUS | ALL_NODES))
820 dest_hw = ~0ULL; /* broadcast */
822 dest_hw = cpu_to_be64((u64)priv->host->csr.guid_hi << 32 |
823 priv->host->csr.guid_lo);
825 /* If this is an ARP packet, convert it. First, we want to make
826 * use of some of the fields, since they tell us a little bit
827 * about the sending machine. */
828 if (ether_type == htons(ETH_P_ARP)) {
829 struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data;
830 struct arphdr *arp = (struct arphdr *)skb->data;
831 unsigned char *arp_ptr = (unsigned char *)(arp + 1);
832 u64 fifo_addr = (u64)ntohs(arp1394->fifo_hi) << 32 |
833 ntohl(arp1394->fifo_lo);
834 u8 max_rec = min(priv->host->csr.max_rec,
835 (u8)(arp1394->max_rec));
836 int sspd = arp1394->sspd;
838 struct eth1394_node_ref *node;
839 struct eth1394_node_info *node_info;
842 /* Sanity check. MacOSX seems to be sending us 131 in this
843 * field (atleast on my Panther G5). Not sure why. */
844 if (sspd > 5 || sspd < 0)
847 maxpayload = min(eth1394_speedto_maxpayload[sspd],
848 (u16)(1 << (max_rec + 1)));
850 guid = get_unaligned(&arp1394->s_uniq_id);
851 node = eth1394_find_node_guid(&priv->ip_node_list,
857 (struct eth1394_node_info *)node->ud->device.driver_data;
859 /* Update our speed/payload/fifo_offset table */
860 node_info->maxpayload = maxpayload;
861 node_info->sspd = sspd;
862 node_info->fifo = fifo_addr;
864 /* Now that we're done with the 1394 specific stuff, we'll
865 * need to alter some of the data. Believe it or not, all
866 * that needs to be done is sender_IP_address needs to be
867 * moved, the destination hardware address get stuffed
868 * in and the hardware address length set to 8.
870 * IMPORTANT: The code below overwrites 1394 specific data
871 * needed above so keep the munging of the data for the
872 * higher level IP stack last. */
875 arp_ptr += arp->ar_hln; /* skip over sender unique id */
876 *(u32 *)arp_ptr = arp1394->sip; /* move sender IP addr */
877 arp_ptr += arp->ar_pln; /* skip over sender IP addr */
879 if (arp->ar_op == htons(ARPOP_REQUEST))
880 memset(arp_ptr, 0, sizeof(u64));
882 memcpy(arp_ptr, dev->dev_addr, sizeof(u64));
885 /* Now add the ethernet header. */
886 if (dev->hard_header(skb, dev, ntohs(ether_type), &dest_hw, NULL,
888 ret = ether1394_type_trans(skb, dev);
893 static int fragment_overlap(struct list_head *frag_list, int offset, int len)
895 struct fragment_info *fi;
897 list_for_each_entry(fi, frag_list, list) {
898 if ( ! ((offset > (fi->offset + fi->len - 1)) ||
899 ((offset + len - 1) < fi->offset)))
905 static struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl)
907 struct partial_datagram *pd;
909 list_for_each_entry(pd, pdgl, list)
916 /* Assumes that new fragment does not overlap any existing fragments */
917 static int new_fragment(struct list_head *frag_info, int offset, int len)
919 struct list_head *lh;
920 struct fragment_info *fi, *fi2, *new;
922 list_for_each(lh, frag_info) {
923 fi = list_entry(lh, struct fragment_info, list);
924 if (fi->offset + fi->len == offset) {
925 /* The new fragment can be tacked on to the end */
927 /* Did the new fragment plug a hole? */
928 fi2 = list_entry(lh->next, struct fragment_info, list);
929 if (fi->offset + fi->len == fi2->offset) {
930 /* glue fragments together */
936 } else if (offset + len == fi->offset) {
937 /* The new fragment can be tacked on to the beginning */
940 /* Did the new fragment plug a hole? */
941 fi2 = list_entry(lh->prev, struct fragment_info, list);
942 if (fi2->offset + fi2->len == fi->offset) {
943 /* glue fragments together */
949 } else if (offset > fi->offset + fi->len) {
951 } else if (offset + len < fi->offset) {
957 new = kmalloc(sizeof(*new), GFP_ATOMIC);
961 new->offset = offset;
964 list_add(&new->list, lh);
968 static int new_partial_datagram(struct net_device *dev, struct list_head *pdgl,
969 int dgl, int dg_size, char *frag_buf,
970 int frag_off, int frag_len)
972 struct partial_datagram *new;
974 new = kmalloc(sizeof(*new), GFP_ATOMIC);
978 INIT_LIST_HEAD(&new->frag_info);
980 if (new_fragment(&new->frag_info, frag_off, frag_len) < 0) {
986 new->dg_size = dg_size;
988 new->skb = dev_alloc_skb(dg_size + dev->hard_header_len + 15);
990 struct fragment_info *fi = list_entry(new->frag_info.next,
991 struct fragment_info,
998 skb_reserve(new->skb, (dev->hard_header_len + 15) & ~15);
999 new->pbuf = skb_put(new->skb, dg_size);
1000 memcpy(new->pbuf + frag_off, frag_buf, frag_len);
1002 list_add(&new->list, pdgl);
1006 static int update_partial_datagram(struct list_head *pdgl, struct list_head *lh,
1007 char *frag_buf, int frag_off, int frag_len)
1009 struct partial_datagram *pd =
1010 list_entry(lh, struct partial_datagram, list);
1012 if (new_fragment(&pd->frag_info, frag_off, frag_len) < 0)
1015 memcpy(pd->pbuf + frag_off, frag_buf, frag_len);
1017 /* Move list entry to beginnig of list so that oldest partial
1018 * datagrams percolate to the end of the list */
1019 list_move(lh, pdgl);
1023 static int is_datagram_complete(struct list_head *lh, int dg_size)
1025 struct partial_datagram *pd;
1026 struct fragment_info *fi;
1028 pd = list_entry(lh, struct partial_datagram, list);
1029 fi = list_entry(pd->frag_info.next, struct fragment_info, list);
1031 return (fi->len == dg_size);
1034 /* Packet reception. We convert the IP1394 encapsulation header to an
1035 * ethernet header, and fill it with some of our other fields. This is
1036 * an incoming packet from the 1394 bus. */
1037 static int ether1394_data_handler(struct net_device *dev, int srcid, int destid,
1040 struct sk_buff *skb;
1041 unsigned long flags;
1042 struct eth1394_priv *priv = netdev_priv(dev);
1043 union eth1394_hdr *hdr = (union eth1394_hdr *)buf;
1044 u16 ether_type = 0; /* initialized to clear warning */
1046 struct unit_directory *ud = priv->ud_list[NODEID_TO_NODE(srcid)];
1047 struct eth1394_node_info *node_info;
1050 struct eth1394_node_ref *node;
1051 node = eth1394_find_node_nodeid(&priv->ip_node_list, srcid);
1053 HPSB_PRINT(KERN_ERR, "ether1394 rx: sender nodeid "
1054 "lookup failure: " NODE_BUS_FMT,
1055 NODE_BUS_ARGS(priv->host, srcid));
1056 priv->stats.rx_dropped++;
1061 priv->ud_list[NODEID_TO_NODE(srcid)] = ud;
1064 node_info = (struct eth1394_node_info *)ud->device.driver_data;
1066 /* First, did we receive a fragmented or unfragmented datagram? */
1067 hdr->words.word1 = ntohs(hdr->words.word1);
1069 hdr_len = hdr_type_len[hdr->common.lf];
1071 if (hdr->common.lf == ETH1394_HDR_LF_UF) {
1072 /* An unfragmented datagram has been received by the ieee1394
1073 * bus. Build an skbuff around it so we can pass it to the
1074 * high level network layer. */
1076 skb = dev_alloc_skb(len + dev->hard_header_len + 15);
1078 ETH1394_PRINT_G(KERN_ERR, "Out of memory\n");
1079 priv->stats.rx_dropped++;
1082 skb_reserve(skb, (dev->hard_header_len + 15) & ~15);
1083 memcpy(skb_put(skb, len - hdr_len), buf + hdr_len,
1085 ether_type = hdr->uf.ether_type;
1087 /* A datagram fragment has been received, now the fun begins. */
1089 struct list_head *pdgl, *lh;
1090 struct partial_datagram *pd;
1092 int fg_len = len - hdr_len;
1096 struct pdg_list *pdg = &(node_info->pdg);
1098 hdr->words.word3 = ntohs(hdr->words.word3);
1099 /* The 4th header word is reserved so no need to do ntohs() */
1101 if (hdr->common.lf == ETH1394_HDR_LF_FF) {
1102 ether_type = hdr->ff.ether_type;
1104 dg_size = hdr->ff.dg_size + 1;
1107 hdr->words.word2 = ntohs(hdr->words.word2);
1109 dg_size = hdr->sf.dg_size + 1;
1110 fg_off = hdr->sf.fg_off;
1112 spin_lock_irqsave(&pdg->lock, flags);
1114 pdgl = &(pdg->list);
1115 lh = find_partial_datagram(pdgl, dgl);
1118 while (pdg->sz >= max_partial_datagrams) {
1119 /* remove the oldest */
1120 purge_partial_datagram(pdgl->prev);
1124 retval = new_partial_datagram(dev, pdgl, dgl, dg_size,
1125 buf + hdr_len, fg_off,
1128 spin_unlock_irqrestore(&pdg->lock, flags);
1132 lh = find_partial_datagram(pdgl, dgl);
1134 struct partial_datagram *pd;
1136 pd = list_entry(lh, struct partial_datagram, list);
1138 if (fragment_overlap(&pd->frag_info, fg_off, fg_len)) {
1139 /* Overlapping fragments, obliterate old
1140 * datagram and start new one. */
1141 purge_partial_datagram(lh);
1142 retval = new_partial_datagram(dev, pdgl, dgl,
1148 spin_unlock_irqrestore(&pdg->lock, flags);
1152 retval = update_partial_datagram(pdgl, lh,
1156 /* Couldn't save off fragment anyway
1157 * so might as well obliterate the
1159 purge_partial_datagram(lh);
1161 spin_unlock_irqrestore(&pdg->lock, flags);
1164 } /* fragment overlap */
1165 } /* new datagram or add to existing one */
1167 pd = list_entry(lh, struct partial_datagram, list);
1169 if (hdr->common.lf == ETH1394_HDR_LF_FF)
1170 pd->ether_type = ether_type;
1172 if (is_datagram_complete(lh, dg_size)) {
1173 ether_type = pd->ether_type;
1175 skb = skb_get(pd->skb);
1176 purge_partial_datagram(lh);
1177 spin_unlock_irqrestore(&pdg->lock, flags);
1179 /* Datagram is not complete, we're done for the
1181 spin_unlock_irqrestore(&pdg->lock, flags);
1184 } /* unframgented datagram or fragmented one */
1186 /* Write metadata, and then pass to the receive level */
1188 skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */
1190 /* Parse the encapsulation header. This actually does the job of
1191 * converting to an ethernet frame header, aswell as arp
1192 * conversion if needed. ARP conversion is easier in this
1193 * direction, since we are using ethernet as our backend. */
1194 skb->protocol = ether1394_parse_encap(skb, dev, srcid, destid,
1197 spin_lock_irqsave(&priv->lock, flags);
1199 if (!skb->protocol) {
1200 priv->stats.rx_errors++;
1201 priv->stats.rx_dropped++;
1202 dev_kfree_skb_any(skb);
1206 if (netif_rx(skb) == NET_RX_DROP) {
1207 priv->stats.rx_errors++;
1208 priv->stats.rx_dropped++;
1213 priv->stats.rx_packets++;
1214 priv->stats.rx_bytes += skb->len;
1217 if (netif_queue_stopped(dev))
1218 netif_wake_queue(dev);
1219 spin_unlock_irqrestore(&priv->lock, flags);
1221 dev->last_rx = jiffies;
1226 static int ether1394_write(struct hpsb_host *host, int srcid, int destid,
1227 quadlet_t *data, u64 addr, size_t len, u16 flags)
1229 struct eth1394_host_info *hi;
1231 hi = hpsb_get_hostinfo(ð1394_highlevel, host);
1233 ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n",
1235 return RCODE_ADDRESS_ERROR;
1238 if (ether1394_data_handler(hi->dev, srcid, destid, (char*)data, len))
1239 return RCODE_ADDRESS_ERROR;
1241 return RCODE_COMPLETE;
1244 static void ether1394_iso(struct hpsb_iso *iso)
1248 struct eth1394_host_info *hi;
1249 struct net_device *dev;
1250 struct eth1394_priv *priv;
1257 hi = hpsb_get_hostinfo(ð1394_highlevel, iso->host);
1259 ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n",
1266 nready = hpsb_iso_n_ready(iso);
1267 for (i = 0; i < nready; i++) {
1268 struct hpsb_iso_packet_info *info =
1269 &iso->infos[(iso->first_packet + i) % iso->buf_packets];
1270 data = (quadlet_t *)(iso->data_buf.kvirt + info->offset);
1272 /* skip over GASP header */
1273 buf = (char *)data + 8;
1274 len = info->len - 8;
1276 specifier_id = (be32_to_cpu(data[0]) & 0xffff) << 8 |
1277 (be32_to_cpu(data[1]) & 0xff000000) >> 24;
1278 source_id = be32_to_cpu(data[0]) >> 16;
1280 priv = netdev_priv(dev);
1282 if (info->channel != (iso->host->csr.broadcast_channel & 0x3f)
1283 || specifier_id != ETHER1394_GASP_SPECIFIER_ID) {
1284 /* This packet is not for us */
1287 ether1394_data_handler(dev, source_id, LOCAL_BUS | ALL_NODES,
1291 hpsb_iso_recv_release_packets(iso, i);
1293 dev->last_rx = jiffies;
1296 /******************************************
1297 * Datagram transmission code
1298 ******************************************/
1300 /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire
1301 * arphdr) is the same format as the ip1394 header, so they overlap. The rest
1302 * needs to be munged a bit. The remainder of the arphdr is formatted based
1303 * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to
1306 * Now that the EUI is used for the hardware address all we need to do to make
1307 * this work for 1394 is to insert 2 quadlets that contain max_rec size,
1308 * speed, and unicast FIFO address information between the sender_unique_id
1309 * and the IP addresses.
1311 static void ether1394_arp_to_1394arp(struct sk_buff *skb,
1312 struct net_device *dev)
1314 struct eth1394_priv *priv = netdev_priv(dev);
1315 struct arphdr *arp = (struct arphdr *)skb->data;
1316 unsigned char *arp_ptr = (unsigned char *)(arp + 1);
1317 struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data;
1319 arp1394->hw_addr_len = 16;
1320 arp1394->sip = *(u32*)(arp_ptr + ETH1394_ALEN);
1321 arp1394->max_rec = priv->host->csr.max_rec;
1322 arp1394->sspd = priv->host->csr.lnk_spd;
1323 arp1394->fifo_hi = htons(priv->local_fifo >> 32);
1324 arp1394->fifo_lo = htonl(priv->local_fifo & ~0x0);
1327 /* We need to encapsulate the standard header with our own. We use the
1328 * ethernet header's proto for our own. */
1329 static unsigned int ether1394_encapsulate_prep(unsigned int max_payload,
1331 union eth1394_hdr *hdr,
1332 u16 dg_size, u16 dgl)
1334 unsigned int adj_max_payload =
1335 max_payload - hdr_type_len[ETH1394_HDR_LF_UF];
1337 /* Does it all fit in one packet? */
1338 if (dg_size <= adj_max_payload) {
1339 hdr->uf.lf = ETH1394_HDR_LF_UF;
1340 hdr->uf.ether_type = proto;
1342 hdr->ff.lf = ETH1394_HDR_LF_FF;
1343 hdr->ff.ether_type = proto;
1344 hdr->ff.dg_size = dg_size - 1;
1346 adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_FF];
1348 return (dg_size + adj_max_payload - 1) / adj_max_payload;
1351 static unsigned int ether1394_encapsulate(struct sk_buff *skb,
1352 unsigned int max_payload,
1353 union eth1394_hdr *hdr)
1355 union eth1394_hdr *bufhdr;
1356 int ftype = hdr->common.lf;
1357 int hdrsz = hdr_type_len[ftype];
1358 unsigned int adj_max_payload = max_payload - hdrsz;
1361 case ETH1394_HDR_LF_UF:
1362 bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz);
1363 bufhdr->words.word1 = htons(hdr->words.word1);
1364 bufhdr->words.word2 = hdr->words.word2;
1367 case ETH1394_HDR_LF_FF:
1368 bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz);
1369 bufhdr->words.word1 = htons(hdr->words.word1);
1370 bufhdr->words.word2 = hdr->words.word2;
1371 bufhdr->words.word3 = htons(hdr->words.word3);
1372 bufhdr->words.word4 = 0;
1374 /* Set frag type here for future interior fragments */
1375 hdr->common.lf = ETH1394_HDR_LF_IF;
1380 hdr->sf.fg_off += adj_max_payload;
1381 bufhdr = (union eth1394_hdr *)skb_pull(skb, adj_max_payload);
1382 if (max_payload >= skb->len)
1383 hdr->common.lf = ETH1394_HDR_LF_LF;
1384 bufhdr->words.word1 = htons(hdr->words.word1);
1385 bufhdr->words.word2 = htons(hdr->words.word2);
1386 bufhdr->words.word3 = htons(hdr->words.word3);
1387 bufhdr->words.word4 = 0;
1389 return min(max_payload, skb->len);
1392 static struct hpsb_packet *ether1394_alloc_common_packet(struct hpsb_host *host)
1394 struct hpsb_packet *p;
1396 p = hpsb_alloc_packet(0);
1399 p->generation = get_hpsb_generation(host);
1400 p->type = hpsb_async;
1405 static int ether1394_prep_write_packet(struct hpsb_packet *p,
1406 struct hpsb_host *host, nodeid_t node,
1407 u64 addr, void *data, int tx_len)
1412 p->tcode = TCODE_WRITEB;
1413 p->header[1] = host->node_id << 16 | addr >> 32;
1414 p->header[2] = addr & 0xffffffff;
1416 p->header_size = 16;
1417 p->expect_response = 1;
1419 if (hpsb_get_tlabel(p)) {
1420 ETH1394_PRINT_G(KERN_ERR, "Out of tlabels\n");
1424 p->node_id << 16 | p->tlabel << 10 | 1 << 8 | TCODE_WRITEB << 4;
1426 p->header[3] = tx_len << 16;
1427 p->data_size = (tx_len + 3) & ~3;
1433 static void ether1394_prep_gasp_packet(struct hpsb_packet *p,
1434 struct eth1394_priv *priv,
1435 struct sk_buff *skb, int length)
1438 p->tcode = TCODE_STREAM_DATA;
1440 p->header[0] = length << 16 | 3 << 14 | priv->broadcast_channel << 8 |
1441 TCODE_STREAM_DATA << 4;
1442 p->data_size = length;
1443 p->data = (quadlet_t *)skb->data - 2;
1444 p->data[0] = cpu_to_be32(priv->host->node_id << 16 |
1445 ETHER1394_GASP_SPECIFIER_ID_HI);
1446 p->data[1] = cpu_to_be32(ETHER1394_GASP_SPECIFIER_ID_LO << 24 |
1447 ETHER1394_GASP_VERSION);
1449 /* Setting the node id to ALL_NODES (not LOCAL_BUS | ALL_NODES)
1450 * prevents hpsb_send_packet() from setting the speed to an arbitrary
1451 * value based on packet->node_id if packet->node_id is not set. */
1452 p->node_id = ALL_NODES;
1453 p->speed_code = priv->bc_sspd;
1456 static void ether1394_free_packet(struct hpsb_packet *packet)
1458 if (packet->tcode != TCODE_STREAM_DATA)
1459 hpsb_free_tlabel(packet);
1460 hpsb_free_packet(packet);
1463 static void ether1394_complete_cb(void *__ptask);
1465 static int ether1394_send_packet(struct packet_task *ptask, unsigned int tx_len)
1467 struct eth1394_priv *priv = ptask->priv;
1468 struct hpsb_packet *packet = NULL;
1470 packet = ether1394_alloc_common_packet(priv->host);
1474 if (ptask->tx_type == ETH1394_GASP) {
1475 int length = tx_len + 2 * sizeof(quadlet_t);
1477 ether1394_prep_gasp_packet(packet, priv, ptask->skb, length);
1478 } else if (ether1394_prep_write_packet(packet, priv->host,
1480 ptask->addr, ptask->skb->data,
1482 hpsb_free_packet(packet);
1486 ptask->packet = packet;
1487 hpsb_set_packet_complete_task(ptask->packet, ether1394_complete_cb,
1490 if (hpsb_send_packet(packet) < 0) {
1491 ether1394_free_packet(packet);
1498 /* Task function to be run when a datagram transmission is completed */
1499 static void ether1394_dg_complete(struct packet_task *ptask, int fail)
1501 struct sk_buff *skb = ptask->skb;
1502 struct eth1394_priv *priv = netdev_priv(skb->dev);
1503 unsigned long flags;
1506 spin_lock_irqsave(&priv->lock, flags);
1508 priv->stats.tx_dropped++;
1509 priv->stats.tx_errors++;
1511 priv->stats.tx_bytes += skb->len;
1512 priv->stats.tx_packets++;
1514 spin_unlock_irqrestore(&priv->lock, flags);
1516 dev_kfree_skb_any(skb);
1517 kmem_cache_free(packet_task_cache, ptask);
1520 /* Callback for when a packet has been sent and the status of that packet is
1522 static void ether1394_complete_cb(void *__ptask)
1524 struct packet_task *ptask = (struct packet_task *)__ptask;
1525 struct hpsb_packet *packet = ptask->packet;
1528 if (packet->tcode != TCODE_STREAM_DATA)
1529 fail = hpsb_packet_success(packet);
1531 ether1394_free_packet(packet);
1533 ptask->outstanding_pkts--;
1534 if (ptask->outstanding_pkts > 0 && !fail) {
1537 /* Add the encapsulation header to the fragment */
1538 tx_len = ether1394_encapsulate(ptask->skb, ptask->max_payload,
1540 if (ether1394_send_packet(ptask, tx_len))
1541 ether1394_dg_complete(ptask, 1);
1543 ether1394_dg_complete(ptask, fail);
1547 /* Transmit a packet (called by kernel) */
1548 static int ether1394_tx(struct sk_buff *skb, struct net_device *dev)
1550 gfp_t kmflags = in_interrupt() ? GFP_ATOMIC : GFP_KERNEL;
1551 struct eth1394hdr *eth;
1552 struct eth1394_priv *priv = netdev_priv(dev);
1554 unsigned long flags;
1556 eth1394_tx_type tx_type;
1558 unsigned int tx_len;
1559 unsigned int max_payload;
1562 struct packet_task *ptask;
1563 struct eth1394_node_ref *node;
1564 struct eth1394_node_info *node_info = NULL;
1566 ptask = kmem_cache_alloc(packet_task_cache, kmflags);
1567 if (ptask == NULL) {
1572 /* XXX Ignore this for now. Noticed that when MacOSX is the IRM,
1573 * it does not set our validity bit. We need to compensate for
1574 * that somewhere else, but not in eth1394. */
1576 if ((priv->host->csr.broadcast_channel & 0xc0000000) != 0xc0000000) {
1582 skb = skb_share_check(skb, kmflags);
1588 /* Get rid of the fake eth1394 header, but save a pointer */
1589 eth = (struct eth1394hdr *)skb->data;
1590 skb_pull(skb, ETH1394_HLEN);
1592 proto = eth->h_proto;
1595 /* Set the transmission type for the packet. ARP packets and IP
1596 * broadcast packets are sent via GASP. */
1597 if (memcmp(eth->h_dest, dev->broadcast, ETH1394_ALEN) == 0 ||
1598 proto == htons(ETH_P_ARP) ||
1599 (proto == htons(ETH_P_IP) &&
1600 IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) {
1601 tx_type = ETH1394_GASP;
1602 dest_node = LOCAL_BUS | ALL_NODES;
1603 max_payload = priv->bc_maxpayload - ETHER1394_GASP_OVERHEAD;
1604 BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD);
1606 if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF])
1609 __be64 guid = get_unaligned((u64 *)eth->h_dest);
1611 node = eth1394_find_node_guid(&priv->ip_node_list,
1618 (struct eth1394_node_info *)node->ud->device.driver_data;
1619 if (node_info->fifo == CSR1212_INVALID_ADDR_SPACE) {
1624 dest_node = node->ud->ne->nodeid;
1625 max_payload = node_info->maxpayload;
1626 BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD);
1628 dgl = node_info->dgl;
1629 if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF])
1631 tx_type = ETH1394_WRREQ;
1634 /* If this is an ARP packet, convert it */
1635 if (proto == htons(ETH_P_ARP))
1636 ether1394_arp_to_1394arp(skb, dev);
1638 ptask->hdr.words.word1 = 0;
1639 ptask->hdr.words.word2 = 0;
1640 ptask->hdr.words.word3 = 0;
1641 ptask->hdr.words.word4 = 0;
1644 ptask->tx_type = tx_type;
1646 if (tx_type != ETH1394_GASP) {
1649 spin_lock_irqsave(&priv->lock, flags);
1650 addr = node_info->fifo;
1651 spin_unlock_irqrestore(&priv->lock, flags);
1654 ptask->dest_node = dest_node;
1657 ptask->tx_type = tx_type;
1658 ptask->max_payload = max_payload;
1659 ptask->outstanding_pkts = ether1394_encapsulate_prep(max_payload,
1660 proto, &ptask->hdr, dg_size, dgl);
1662 /* Add the encapsulation header to the fragment */
1663 tx_len = ether1394_encapsulate(skb, max_payload, &ptask->hdr);
1664 dev->trans_start = jiffies;
1665 if (ether1394_send_packet(ptask, tx_len))
1668 netif_wake_queue(dev);
1672 kmem_cache_free(packet_task_cache, ptask);
1677 spin_lock_irqsave(&priv->lock, flags);
1678 priv->stats.tx_dropped++;
1679 priv->stats.tx_errors++;
1680 spin_unlock_irqrestore(&priv->lock, flags);
1682 if (netif_queue_stopped(dev))
1683 netif_wake_queue(dev);
1685 return 0; /* returning non-zero causes serious problems */
1688 static void ether1394_get_drvinfo(struct net_device *dev,
1689 struct ethtool_drvinfo *info)
1691 strcpy(info->driver, driver_name);
1692 strcpy(info->bus_info, "ieee1394"); /* FIXME provide more detail? */
1695 static struct ethtool_ops ethtool_ops = {
1696 .get_drvinfo = ether1394_get_drvinfo
1699 static int __init ether1394_init_module (void)
1701 packet_task_cache = kmem_cache_create("packet_task",
1702 sizeof(struct packet_task),
1705 hpsb_register_highlevel(ð1394_highlevel);
1706 return hpsb_register_protocol(ð1394_proto_driver);
1709 static void __exit ether1394_exit_module (void)
1711 hpsb_unregister_protocol(ð1394_proto_driver);
1712 hpsb_unregister_highlevel(ð1394_highlevel);
1713 kmem_cache_destroy(packet_task_cache);
1716 module_init(ether1394_init_module);
1717 module_exit(ether1394_exit_module);