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>
50 #include <linux/workqueue.h>
52 #include <linux/netdevice.h>
53 #include <linux/inetdevice.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 static const u16 eth1394_speedto_maxpayload[] = {
140 /* S100, S200, S400, S800, S1600, S3200 */
141 512, 1024, 2048, 4096, 4096, 4096
144 MODULE_AUTHOR("Ben Collins (bcollins@debian.org)");
145 MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)");
146 MODULE_LICENSE("GPL");
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.
154 static int max_partial_datagrams = 25;
155 module_param(max_partial_datagrams, int, S_IRUGO | S_IWUSR);
156 MODULE_PARM_DESC(max_partial_datagrams,
157 "Maximum number of partially received fragmented datagrams "
161 static int ether1394_header(struct sk_buff *skb, struct net_device *dev,
162 unsigned short type, void *daddr, void *saddr,
164 static int ether1394_rebuild_header(struct sk_buff *skb);
165 static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr);
166 static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh);
167 static void ether1394_header_cache_update(struct hh_cache *hh,
168 struct net_device *dev,
169 unsigned char *haddr);
170 static int ether1394_tx(struct sk_buff *skb, struct net_device *dev);
171 static void ether1394_iso(struct hpsb_iso *iso);
173 static struct ethtool_ops ethtool_ops;
175 static int ether1394_write(struct hpsb_host *host, int srcid, int destid,
176 quadlet_t *data, u64 addr, size_t len, u16 flags);
177 static void ether1394_add_host(struct hpsb_host *host);
178 static void ether1394_remove_host(struct hpsb_host *host);
179 static void ether1394_host_reset(struct hpsb_host *host);
181 /* Function for incoming 1394 packets */
182 static struct hpsb_address_ops addr_ops = {
183 .write = ether1394_write,
186 /* Ieee1394 highlevel driver functions */
187 static struct hpsb_highlevel eth1394_highlevel = {
189 .add_host = ether1394_add_host,
190 .remove_host = ether1394_remove_host,
191 .host_reset = ether1394_host_reset,
194 static int ether1394_recv_init(struct eth1394_priv *priv)
196 unsigned int iso_buf_size;
198 /* FIXME: rawiso limits us to PAGE_SIZE */
199 iso_buf_size = min((unsigned int)PAGE_SIZE,
200 2 * (1U << (priv->host->csr.max_rec + 1)));
202 priv->iso = hpsb_iso_recv_init(priv->host,
203 ETHER1394_GASP_BUFFERS * iso_buf_size,
204 ETHER1394_GASP_BUFFERS,
205 priv->broadcast_channel,
206 HPSB_ISO_DMA_PACKET_PER_BUFFER,
208 if (priv->iso == NULL) {
209 ETH1394_PRINT_G(KERN_ERR, "Failed to allocate IR context\n");
210 priv->bc_state = ETHER1394_BC_ERROR;
214 if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0)
215 priv->bc_state = ETHER1394_BC_STOPPED;
217 priv->bc_state = ETHER1394_BC_RUNNING;
221 /* This is called after an "ifup" */
222 static int ether1394_open(struct net_device *dev)
224 struct eth1394_priv *priv = netdev_priv(dev);
227 if (priv->bc_state == ETHER1394_BC_ERROR) {
228 ret = ether1394_recv_init(priv);
232 netif_start_queue(dev);
236 /* This is called after an "ifdown" */
237 static int ether1394_stop(struct net_device *dev)
239 /* flush priv->wake */
240 flush_scheduled_work();
242 netif_stop_queue(dev);
246 /* Return statistics to the caller */
247 static struct net_device_stats *ether1394_stats(struct net_device *dev)
249 return &(((struct eth1394_priv *)netdev_priv(dev))->stats);
252 /* FIXME: What to do if we timeout? I think a host reset is probably in order,
253 * so that's what we do. Should we increment the stat counters too? */
254 static void ether1394_tx_timeout(struct net_device *dev)
256 struct hpsb_host *host =
257 ((struct eth1394_priv *)netdev_priv(dev))->host;
259 ETH1394_PRINT(KERN_ERR, dev->name, "Timeout, resetting host\n");
260 ether1394_host_reset(host);
263 static inline int ether1394_max_mtu(struct hpsb_host* host)
265 return (1 << (host->csr.max_rec + 1))
266 - sizeof(union eth1394_hdr) - ETHER1394_GASP_OVERHEAD;
269 static int ether1394_change_mtu(struct net_device *dev, int new_mtu)
276 max_mtu = ether1394_max_mtu(
277 ((struct eth1394_priv *)netdev_priv(dev))->host);
278 if (new_mtu > max_mtu) {
279 ETH1394_PRINT(KERN_INFO, dev->name,
280 "Local node constrains MTU to %d\n", max_mtu);
288 static void purge_partial_datagram(struct list_head *old)
290 struct partial_datagram *pd;
291 struct list_head *lh, *n;
292 struct fragment_info *fi;
294 pd = list_entry(old, struct partial_datagram, list);
296 list_for_each_safe(lh, n, &pd->frag_info) {
297 fi = list_entry(lh, struct fragment_info, list);
306 /******************************************
307 * 1394 bus activity functions
308 ******************************************/
310 static struct eth1394_node_ref *eth1394_find_node(struct list_head *inl,
311 struct unit_directory *ud)
313 struct eth1394_node_ref *node;
315 list_for_each_entry(node, inl, list)
322 static struct eth1394_node_ref *eth1394_find_node_guid(struct list_head *inl,
325 struct eth1394_node_ref *node;
327 list_for_each_entry(node, inl, list)
328 if (node->ud->ne->guid == guid)
334 static struct eth1394_node_ref *eth1394_find_node_nodeid(struct list_head *inl,
337 struct eth1394_node_ref *node;
339 list_for_each_entry(node, inl, list)
340 if (node->ud->ne->nodeid == nodeid)
346 static int eth1394_new_node(struct eth1394_host_info *hi,
347 struct unit_directory *ud)
349 struct eth1394_priv *priv;
350 struct eth1394_node_ref *new_node;
351 struct eth1394_node_info *node_info;
353 new_node = kmalloc(sizeof(*new_node), GFP_KERNEL);
357 node_info = kmalloc(sizeof(*node_info), GFP_KERNEL);
363 spin_lock_init(&node_info->pdg.lock);
364 INIT_LIST_HEAD(&node_info->pdg.list);
365 node_info->pdg.sz = 0;
366 node_info->fifo = CSR1212_INVALID_ADDR_SPACE;
368 ud->device.driver_data = node_info;
371 priv = netdev_priv(hi->dev);
372 list_add_tail(&new_node->list, &priv->ip_node_list);
376 static int eth1394_probe(struct device *dev)
378 struct unit_directory *ud;
379 struct eth1394_host_info *hi;
381 ud = container_of(dev, struct unit_directory, device);
382 hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host);
386 return eth1394_new_node(hi, ud);
389 static int eth1394_remove(struct device *dev)
391 struct unit_directory *ud;
392 struct eth1394_host_info *hi;
393 struct eth1394_priv *priv;
394 struct eth1394_node_ref *old_node;
395 struct eth1394_node_info *node_info;
396 struct list_head *lh, *n;
399 ud = container_of(dev, struct unit_directory, device);
400 hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host);
404 priv = netdev_priv(hi->dev);
406 old_node = eth1394_find_node(&priv->ip_node_list, ud);
410 list_del(&old_node->list);
413 node_info = (struct eth1394_node_info*)ud->device.driver_data;
415 spin_lock_irqsave(&node_info->pdg.lock, flags);
416 /* The partial datagram list should be empty, but we'll just
417 * make sure anyway... */
418 list_for_each_safe(lh, n, &node_info->pdg.list)
419 purge_partial_datagram(lh);
420 spin_unlock_irqrestore(&node_info->pdg.lock, flags);
423 ud->device.driver_data = NULL;
427 static int eth1394_update(struct unit_directory *ud)
429 struct eth1394_host_info *hi;
430 struct eth1394_priv *priv;
431 struct eth1394_node_ref *node;
433 hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host);
437 priv = netdev_priv(hi->dev);
438 node = eth1394_find_node(&priv->ip_node_list, ud);
442 return eth1394_new_node(hi, ud);
445 static struct ieee1394_device_id eth1394_id_table[] = {
447 .match_flags = (IEEE1394_MATCH_SPECIFIER_ID |
448 IEEE1394_MATCH_VERSION),
449 .specifier_id = ETHER1394_GASP_SPECIFIER_ID,
450 .version = ETHER1394_GASP_VERSION,
455 MODULE_DEVICE_TABLE(ieee1394, eth1394_id_table);
457 static struct hpsb_protocol_driver eth1394_proto_driver = {
459 .id_table = eth1394_id_table,
460 .update = eth1394_update,
462 .probe = eth1394_probe,
463 .remove = eth1394_remove,
467 static void ether1394_reset_priv(struct net_device *dev, int set_mtu)
471 struct eth1394_priv *priv = netdev_priv(dev);
472 struct hpsb_host *host = priv->host;
473 u64 guid = get_unaligned((u64 *)&(host->csr.rom->bus_info_data[3]));
474 int max_speed = IEEE1394_SPEED_MAX;
476 spin_lock_irqsave(&priv->lock, flags);
478 memset(priv->ud_list, 0, sizeof(priv->ud_list));
479 priv->bc_maxpayload = 512;
481 /* Determine speed limit */
482 /* FIXME: This is broken for nodes with link speed < PHY speed,
483 * and it is suboptimal for S200B...S800B hardware.
484 * The result of nodemgr's speed probe should be used somehow. */
485 for (i = 0; i < host->node_count; i++) {
486 /* take care of S100B...S400B PHY ports */
487 if (host->speed[i] == SELFID_SPEED_UNKNOWN) {
488 max_speed = IEEE1394_SPEED_100;
491 if (max_speed > host->speed[i])
492 max_speed = host->speed[i];
494 priv->bc_sspd = max_speed;
497 /* Use the RFC 2734 default 1500 octets or the maximum payload
499 dev->mtu = min(1500, ether1394_max_mtu(host));
501 /* Set our hardware address while we're at it */
502 memcpy(dev->dev_addr, &guid, sizeof(u64));
503 memset(dev->broadcast, 0xff, sizeof(u64));
506 spin_unlock_irqrestore(&priv->lock, flags);
509 static void ether1394_init_dev(struct net_device *dev)
511 dev->open = ether1394_open;
512 dev->stop = ether1394_stop;
513 dev->hard_start_xmit = ether1394_tx;
514 dev->get_stats = ether1394_stats;
515 dev->tx_timeout = ether1394_tx_timeout;
516 dev->change_mtu = ether1394_change_mtu;
518 dev->hard_header = ether1394_header;
519 dev->rebuild_header = ether1394_rebuild_header;
520 dev->hard_header_cache = ether1394_header_cache;
521 dev->header_cache_update= ether1394_header_cache_update;
522 dev->hard_header_parse = ether1394_header_parse;
524 SET_ETHTOOL_OPS(dev, ðtool_ops);
526 dev->watchdog_timeo = ETHER1394_TIMEOUT;
527 dev->flags = IFF_BROADCAST | IFF_MULTICAST;
528 dev->features = NETIF_F_HIGHDMA;
529 dev->addr_len = ETH1394_ALEN;
530 dev->hard_header_len = ETH1394_HLEN;
531 dev->type = ARPHRD_IEEE1394;
533 /* FIXME: This value was copied from ether_setup(). Is it too much? */
534 dev->tx_queue_len = 1000;
538 * Wake the queue up after commonly encountered transmit failure conditions are
539 * hopefully over. Currently only tlabel exhaustion is accounted for.
541 static void ether1394_wake_queue(struct work_struct *work)
543 struct eth1394_priv *priv;
544 struct hpsb_packet *packet;
546 priv = container_of(work, struct eth1394_priv, wake);
547 packet = hpsb_alloc_packet(0);
549 /* This is really bad, but unjam the queue anyway. */
553 packet->host = priv->host;
554 packet->node_id = priv->wake_node;
556 * A transaction label is all we really want. If we get one, it almost
557 * always means we can get a lot more because the ieee1394 core recycled
558 * a whole batch of tlabels, at last.
560 if (hpsb_get_tlabel(packet) == 0)
561 hpsb_free_tlabel(packet);
563 hpsb_free_packet(packet);
565 netif_wake_queue(priv->wake_dev);
569 * This function is called every time a card is found. It is generally called
570 * when the module is installed. This is where we add all of our ethernet
571 * devices. One for each host.
573 static void ether1394_add_host(struct hpsb_host *host)
575 struct eth1394_host_info *hi = NULL;
576 struct net_device *dev = NULL;
577 struct eth1394_priv *priv;
580 if (hpsb_config_rom_ip1394_add(host) != 0) {
581 ETH1394_PRINT_G(KERN_ERR, "Can't add IP-over-1394 ROM entry\n");
585 fifo_addr = hpsb_allocate_and_register_addrspace(
586 ð1394_highlevel, host, &addr_ops,
587 ETHER1394_REGION_ADDR_LEN, ETHER1394_REGION_ADDR_LEN,
588 CSR1212_INVALID_ADDR_SPACE, CSR1212_INVALID_ADDR_SPACE);
589 if (fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
590 ETH1394_PRINT_G(KERN_ERR, "Cannot register CSR space\n");
591 hpsb_config_rom_ip1394_remove(host);
595 dev = alloc_netdev(sizeof(*priv), "eth%d", ether1394_init_dev);
597 ETH1394_PRINT_G(KERN_ERR, "Out of memory\n");
601 SET_MODULE_OWNER(dev);
603 /* FIXME - Is this the correct parent device anyway? */
604 SET_NETDEV_DEV(dev, &host->device);
607 priv = netdev_priv(dev);
608 INIT_LIST_HEAD(&priv->ip_node_list);
609 spin_lock_init(&priv->lock);
611 priv->local_fifo = fifo_addr;
612 INIT_WORK(&priv->wake, ether1394_wake_queue);
613 priv->wake_dev = dev;
615 hi = hpsb_create_hostinfo(ð1394_highlevel, host, sizeof(*hi));
617 ETH1394_PRINT_G(KERN_ERR, "Out of memory\n");
621 ether1394_reset_priv(dev, 1);
623 if (register_netdev(dev)) {
624 ETH1394_PRINT_G(KERN_ERR, "Cannot register the driver\n");
628 ETH1394_PRINT(KERN_INFO, dev->name, "IPv4 over IEEE 1394 (fw-host%d)\n",
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;
638 ether1394_recv_init(priv);
644 hpsb_destroy_hostinfo(ð1394_highlevel, host);
645 hpsb_unregister_addrspace(ð1394_highlevel, host, fifo_addr);
646 hpsb_config_rom_ip1394_remove(host);
649 /* Remove a card from our list */
650 static void ether1394_remove_host(struct hpsb_host *host)
652 struct eth1394_host_info *hi;
653 struct eth1394_priv *priv;
655 hi = hpsb_get_hostinfo(ð1394_highlevel, host);
658 priv = netdev_priv(hi->dev);
659 hpsb_unregister_addrspace(ð1394_highlevel, host, priv->local_fifo);
660 hpsb_config_rom_ip1394_remove(host);
662 hpsb_iso_shutdown(priv->iso);
663 unregister_netdev(hi->dev);
664 free_netdev(hi->dev);
667 /* A bus reset happened */
668 static void ether1394_host_reset(struct hpsb_host *host)
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;
678 hi = hpsb_get_hostinfo(ð1394_highlevel, host);
680 /* This can happen for hosts that we don't use */
685 priv = netdev_priv(dev);
687 /* Reset our private host data, but not our MTU */
688 netif_stop_queue(dev);
689 ether1394_reset_priv(dev, 0);
691 list_for_each_entry(node, &priv->ip_node_list, list) {
692 node_info = node->ud->device.driver_data;
694 spin_lock_irqsave(&node_info->pdg.lock, flags);
696 list_for_each_safe(lh, n, &node_info->pdg.list)
697 purge_partial_datagram(lh);
699 INIT_LIST_HEAD(&(node_info->pdg.list));
700 node_info->pdg.sz = 0;
702 spin_unlock_irqrestore(&node_info->pdg.lock, flags);
705 netif_wake_queue(dev);
708 /******************************************
709 * HW Header net device functions
710 ******************************************/
711 /* These functions have been adapted from net/ethernet/eth.c */
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). */
716 static int ether1394_header(struct sk_buff *skb, struct net_device *dev,
717 unsigned short type, void *daddr, void *saddr,
720 struct eth1394hdr *eth =
721 (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN);
723 eth->h_proto = htons(type);
725 if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
726 memset(eth->h_dest, 0, dev->addr_len);
727 return dev->hard_header_len;
731 memcpy(eth->h_dest, daddr, dev->addr_len);
732 return dev->hard_header_len;
735 return -dev->hard_header_len;
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.
742 * This routine CANNOT use cached dst->neigh!
743 * Really, it is used only when dst->neigh is wrong.
745 static int ether1394_rebuild_header(struct sk_buff *skb)
747 struct eth1394hdr *eth = (struct eth1394hdr *)skb->data;
749 if (eth->h_proto == htons(ETH_P_IP))
750 return arp_find((unsigned char *)ð->h_dest, skb);
752 ETH1394_PRINT(KERN_DEBUG, skb->dev->name,
753 "unable to resolve type %04x addresses\n",
754 ntohs(eth->h_proto));
758 static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr)
760 struct net_device *dev = skb->dev;
762 memcpy(haddr, dev->dev_addr, ETH1394_ALEN);
766 static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh)
768 unsigned short 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);
773 if (type == htons(ETH_P_802_3))
777 memcpy(eth->h_dest, neigh->ha, dev->addr_len);
779 hh->hh_len = ETH1394_HLEN;
783 /* Called by Address Resolution module to notify changes in address. */
784 static void ether1394_header_cache_update(struct hh_cache *hh,
785 struct net_device *dev,
786 unsigned char * haddr)
788 memcpy((u8 *)hh->hh_data + 16 - ETH1394_HLEN, haddr, dev->addr_len);
791 /******************************************
792 * Datagram reception code
793 ******************************************/
795 /* Copied from net/ethernet/eth.c */
796 static u16 ether1394_type_trans(struct sk_buff *skb, struct net_device *dev)
798 struct eth1394hdr *eth;
801 skb_reset_mac_header(skb);
802 skb_pull(skb, ETH1394_HLEN);
803 eth = eth1394_hdr(skb);
805 if (*eth->h_dest & 1) {
806 if (memcmp(eth->h_dest, dev->broadcast, dev->addr_len) == 0)
807 skb->pkt_type = PACKET_BROADCAST;
810 skb->pkt_type = PACKET_MULTICAST;
813 if (memcmp(eth->h_dest, dev->dev_addr, dev->addr_len))
814 skb->pkt_type = PACKET_OTHERHOST;
817 if (ntohs(eth->h_proto) >= 1536)
822 if (*(unsigned short *)rawp == 0xFFFF)
823 return htons(ETH_P_802_3);
825 return htons(ETH_P_802_2);
828 /* Parse an encapsulated IP1394 header into an ethernet frame packet.
829 * We also perform ARP translation here, if need be. */
830 static u16 ether1394_parse_encap(struct sk_buff *skb, struct net_device *dev,
831 nodeid_t srcid, nodeid_t destid,
834 struct eth1394_priv *priv = netdev_priv(dev);
836 unsigned short ret = 0;
838 /* Setup our hw addresses. We use these to build the ethernet header. */
839 if (destid == (LOCAL_BUS | ALL_NODES))
840 dest_hw = ~0ULL; /* broadcast */
842 dest_hw = cpu_to_be64((u64)priv->host->csr.guid_hi << 32 |
843 priv->host->csr.guid_lo);
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;
858 struct eth1394_node_ref *node;
859 struct eth1394_node_info *node_info;
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)
867 maxpayload = min(eth1394_speedto_maxpayload[sspd],
868 (u16)(1 << (max_rec + 1)));
870 guid = get_unaligned(&arp1394->s_uniq_id);
871 node = eth1394_find_node_guid(&priv->ip_node_list,
877 (struct eth1394_node_info *)node->ud->device.driver_data;
879 /* Update our speed/payload/fifo_offset table */
880 node_info->maxpayload = maxpayload;
881 node_info->sspd = sspd;
882 node_info->fifo = fifo_addr;
884 /* Now that we're done with the 1394 specific stuff, we'll
885 * need to alter some of the data. Believe it or not, all
886 * that needs to be done is sender_IP_address needs to be
887 * moved, the destination hardware address get stuffed
888 * in and the hardware address length set to 8.
890 * IMPORTANT: The code below overwrites 1394 specific data
891 * needed above so keep the munging of the data for the
892 * higher level IP stack last. */
895 arp_ptr += arp->ar_hln; /* skip over sender unique id */
896 *(u32 *)arp_ptr = arp1394->sip; /* move sender IP addr */
897 arp_ptr += arp->ar_pln; /* skip over sender IP addr */
899 if (arp->ar_op == htons(ARPOP_REQUEST))
900 memset(arp_ptr, 0, sizeof(u64));
902 memcpy(arp_ptr, dev->dev_addr, sizeof(u64));
905 /* Now add the ethernet header. */
906 if (dev->hard_header(skb, dev, ntohs(ether_type), &dest_hw, NULL,
908 ret = ether1394_type_trans(skb, dev);
913 static int fragment_overlap(struct list_head *frag_list, int offset, int len)
915 struct fragment_info *fi;
916 int end = offset + len;
918 list_for_each_entry(fi, frag_list, list)
919 if (offset < fi->offset + fi->len && end > fi->offset)
925 static struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl)
927 struct partial_datagram *pd;
929 list_for_each_entry(pd, pdgl, list)
936 /* Assumes that new fragment does not overlap any existing fragments */
937 static int new_fragment(struct list_head *frag_info, int offset, int len)
939 struct list_head *lh;
940 struct fragment_info *fi, *fi2, *new;
942 list_for_each(lh, frag_info) {
943 fi = list_entry(lh, struct fragment_info, list);
944 if (fi->offset + fi->len == offset) {
945 /* The new fragment can be tacked on to the end */
947 /* Did the new fragment plug a hole? */
948 fi2 = list_entry(lh->next, struct fragment_info, list);
949 if (fi->offset + fi->len == fi2->offset) {
950 /* glue fragments together */
956 } else if (offset + len == fi->offset) {
957 /* The new fragment can be tacked on to the beginning */
960 /* Did the new fragment plug a hole? */
961 fi2 = list_entry(lh->prev, struct fragment_info, list);
962 if (fi2->offset + fi2->len == fi->offset) {
963 /* glue fragments together */
969 } else if (offset > fi->offset + fi->len) {
971 } else if (offset + len < fi->offset) {
977 new = kmalloc(sizeof(*new), GFP_ATOMIC);
981 new->offset = offset;
984 list_add(&new->list, lh);
988 static int new_partial_datagram(struct net_device *dev, struct list_head *pdgl,
989 int dgl, int dg_size, char *frag_buf,
990 int frag_off, int frag_len)
992 struct partial_datagram *new;
994 new = kmalloc(sizeof(*new), GFP_ATOMIC);
998 INIT_LIST_HEAD(&new->frag_info);
1000 if (new_fragment(&new->frag_info, frag_off, frag_len) < 0) {
1006 new->dg_size = dg_size;
1008 new->skb = dev_alloc_skb(dg_size + dev->hard_header_len + 15);
1010 struct fragment_info *fi = list_entry(new->frag_info.next,
1011 struct fragment_info,
1018 skb_reserve(new->skb, (dev->hard_header_len + 15) & ~15);
1019 new->pbuf = skb_put(new->skb, dg_size);
1020 memcpy(new->pbuf + frag_off, frag_buf, frag_len);
1022 list_add(&new->list, pdgl);
1026 static int update_partial_datagram(struct list_head *pdgl, struct list_head *lh,
1027 char *frag_buf, int frag_off, int frag_len)
1029 struct partial_datagram *pd =
1030 list_entry(lh, struct partial_datagram, list);
1032 if (new_fragment(&pd->frag_info, frag_off, frag_len) < 0)
1035 memcpy(pd->pbuf + frag_off, frag_buf, frag_len);
1037 /* Move list entry to beginnig of list so that oldest partial
1038 * datagrams percolate to the end of the list */
1039 list_move(lh, pdgl);
1043 static int is_datagram_complete(struct list_head *lh, int dg_size)
1045 struct partial_datagram *pd;
1046 struct fragment_info *fi;
1048 pd = list_entry(lh, struct partial_datagram, list);
1049 fi = list_entry(pd->frag_info.next, struct fragment_info, list);
1051 return (fi->len == dg_size);
1054 /* Packet reception. We convert the IP1394 encapsulation header to an
1055 * ethernet header, and fill it with some of our other fields. This is
1056 * an incoming packet from the 1394 bus. */
1057 static int ether1394_data_handler(struct net_device *dev, int srcid, int destid,
1060 struct sk_buff *skb;
1061 unsigned long flags;
1062 struct eth1394_priv *priv = netdev_priv(dev);
1063 union eth1394_hdr *hdr = (union eth1394_hdr *)buf;
1064 u16 ether_type = 0; /* initialized to clear warning */
1066 struct unit_directory *ud = priv->ud_list[NODEID_TO_NODE(srcid)];
1067 struct eth1394_node_info *node_info;
1070 struct eth1394_node_ref *node;
1071 node = eth1394_find_node_nodeid(&priv->ip_node_list, srcid);
1072 if (unlikely(!node)) {
1073 HPSB_PRINT(KERN_ERR, "ether1394 rx: sender nodeid "
1074 "lookup failure: " NODE_BUS_FMT,
1075 NODE_BUS_ARGS(priv->host, srcid));
1076 priv->stats.rx_dropped++;
1081 priv->ud_list[NODEID_TO_NODE(srcid)] = ud;
1084 node_info = (struct eth1394_node_info *)ud->device.driver_data;
1086 /* First, did we receive a fragmented or unfragmented datagram? */
1087 hdr->words.word1 = ntohs(hdr->words.word1);
1089 hdr_len = hdr_type_len[hdr->common.lf];
1091 if (hdr->common.lf == ETH1394_HDR_LF_UF) {
1092 /* An unfragmented datagram has been received by the ieee1394
1093 * bus. Build an skbuff around it so we can pass it to the
1094 * high level network layer. */
1096 skb = dev_alloc_skb(len + dev->hard_header_len + 15);
1097 if (unlikely(!skb)) {
1098 ETH1394_PRINT_G(KERN_ERR, "Out of memory\n");
1099 priv->stats.rx_dropped++;
1102 skb_reserve(skb, (dev->hard_header_len + 15) & ~15);
1103 memcpy(skb_put(skb, len - hdr_len), buf + hdr_len,
1105 ether_type = hdr->uf.ether_type;
1107 /* A datagram fragment has been received, now the fun begins. */
1109 struct list_head *pdgl, *lh;
1110 struct partial_datagram *pd;
1112 int fg_len = len - hdr_len;
1116 struct pdg_list *pdg = &(node_info->pdg);
1118 hdr->words.word3 = ntohs(hdr->words.word3);
1119 /* The 4th header word is reserved so no need to do ntohs() */
1121 if (hdr->common.lf == ETH1394_HDR_LF_FF) {
1122 ether_type = hdr->ff.ether_type;
1124 dg_size = hdr->ff.dg_size + 1;
1127 hdr->words.word2 = ntohs(hdr->words.word2);
1129 dg_size = hdr->sf.dg_size + 1;
1130 fg_off = hdr->sf.fg_off;
1132 spin_lock_irqsave(&pdg->lock, flags);
1134 pdgl = &(pdg->list);
1135 lh = find_partial_datagram(pdgl, dgl);
1138 while (pdg->sz >= max_partial_datagrams) {
1139 /* remove the oldest */
1140 purge_partial_datagram(pdgl->prev);
1144 retval = new_partial_datagram(dev, pdgl, dgl, dg_size,
1145 buf + hdr_len, fg_off,
1148 spin_unlock_irqrestore(&pdg->lock, flags);
1152 lh = find_partial_datagram(pdgl, dgl);
1154 struct partial_datagram *pd;
1156 pd = list_entry(lh, struct partial_datagram, list);
1158 if (fragment_overlap(&pd->frag_info, fg_off, fg_len)) {
1159 /* Overlapping fragments, obliterate old
1160 * datagram and start new one. */
1161 purge_partial_datagram(lh);
1162 retval = new_partial_datagram(dev, pdgl, dgl,
1168 spin_unlock_irqrestore(&pdg->lock, flags);
1172 retval = update_partial_datagram(pdgl, lh,
1176 /* Couldn't save off fragment anyway
1177 * so might as well obliterate the
1179 purge_partial_datagram(lh);
1181 spin_unlock_irqrestore(&pdg->lock, flags);
1184 } /* fragment overlap */
1185 } /* new datagram or add to existing one */
1187 pd = list_entry(lh, struct partial_datagram, list);
1189 if (hdr->common.lf == ETH1394_HDR_LF_FF)
1190 pd->ether_type = ether_type;
1192 if (is_datagram_complete(lh, dg_size)) {
1193 ether_type = pd->ether_type;
1195 skb = skb_get(pd->skb);
1196 purge_partial_datagram(lh);
1197 spin_unlock_irqrestore(&pdg->lock, flags);
1199 /* Datagram is not complete, we're done for the
1201 spin_unlock_irqrestore(&pdg->lock, flags);
1204 } /* unframgented datagram or fragmented one */
1206 /* Write metadata, and then pass to the receive level */
1208 skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */
1210 /* Parse the encapsulation header. This actually does the job of
1211 * converting to an ethernet frame header, aswell as arp
1212 * conversion if needed. ARP conversion is easier in this
1213 * direction, since we are using ethernet as our backend. */
1214 skb->protocol = ether1394_parse_encap(skb, dev, srcid, destid,
1217 spin_lock_irqsave(&priv->lock, flags);
1219 if (!skb->protocol) {
1220 priv->stats.rx_errors++;
1221 priv->stats.rx_dropped++;
1222 dev_kfree_skb_any(skb);
1226 if (netif_rx(skb) == NET_RX_DROP) {
1227 priv->stats.rx_errors++;
1228 priv->stats.rx_dropped++;
1233 priv->stats.rx_packets++;
1234 priv->stats.rx_bytes += skb->len;
1237 if (netif_queue_stopped(dev))
1238 netif_wake_queue(dev);
1239 spin_unlock_irqrestore(&priv->lock, flags);
1241 dev->last_rx = jiffies;
1246 static int ether1394_write(struct hpsb_host *host, int srcid, int destid,
1247 quadlet_t *data, u64 addr, size_t len, u16 flags)
1249 struct eth1394_host_info *hi;
1251 hi = hpsb_get_hostinfo(ð1394_highlevel, host);
1252 if (unlikely(!hi)) {
1253 ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n",
1255 return RCODE_ADDRESS_ERROR;
1258 if (ether1394_data_handler(hi->dev, srcid, destid, (char*)data, len))
1259 return RCODE_ADDRESS_ERROR;
1261 return RCODE_COMPLETE;
1264 static void ether1394_iso(struct hpsb_iso *iso)
1268 struct eth1394_host_info *hi;
1269 struct net_device *dev;
1270 struct eth1394_priv *priv;
1277 hi = hpsb_get_hostinfo(ð1394_highlevel, iso->host);
1278 if (unlikely(!hi)) {
1279 ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n",
1286 nready = hpsb_iso_n_ready(iso);
1287 for (i = 0; i < nready; i++) {
1288 struct hpsb_iso_packet_info *info =
1289 &iso->infos[(iso->first_packet + i) % iso->buf_packets];
1290 data = (quadlet_t *)(iso->data_buf.kvirt + info->offset);
1292 /* skip over GASP header */
1293 buf = (char *)data + 8;
1294 len = info->len - 8;
1296 specifier_id = (be32_to_cpu(data[0]) & 0xffff) << 8 |
1297 (be32_to_cpu(data[1]) & 0xff000000) >> 24;
1298 source_id = be32_to_cpu(data[0]) >> 16;
1300 priv = netdev_priv(dev);
1302 if (info->channel != (iso->host->csr.broadcast_channel & 0x3f)
1303 || specifier_id != ETHER1394_GASP_SPECIFIER_ID) {
1304 /* This packet is not for us */
1307 ether1394_data_handler(dev, source_id, LOCAL_BUS | ALL_NODES,
1311 hpsb_iso_recv_release_packets(iso, i);
1313 dev->last_rx = jiffies;
1316 /******************************************
1317 * Datagram transmission code
1318 ******************************************/
1320 /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire
1321 * arphdr) is the same format as the ip1394 header, so they overlap. The rest
1322 * needs to be munged a bit. The remainder of the arphdr is formatted based
1323 * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to
1326 * Now that the EUI is used for the hardware address all we need to do to make
1327 * this work for 1394 is to insert 2 quadlets that contain max_rec size,
1328 * speed, and unicast FIFO address information between the sender_unique_id
1329 * and the IP addresses.
1331 static void ether1394_arp_to_1394arp(struct sk_buff *skb,
1332 struct net_device *dev)
1334 struct eth1394_priv *priv = netdev_priv(dev);
1335 struct arphdr *arp = (struct arphdr *)skb->data;
1336 unsigned char *arp_ptr = (unsigned char *)(arp + 1);
1337 struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data;
1339 arp1394->hw_addr_len = 16;
1340 arp1394->sip = *(u32*)(arp_ptr + ETH1394_ALEN);
1341 arp1394->max_rec = priv->host->csr.max_rec;
1342 arp1394->sspd = priv->host->csr.lnk_spd;
1343 arp1394->fifo_hi = htons(priv->local_fifo >> 32);
1344 arp1394->fifo_lo = htonl(priv->local_fifo & ~0x0);
1347 /* We need to encapsulate the standard header with our own. We use the
1348 * ethernet header's proto for our own. */
1349 static unsigned int ether1394_encapsulate_prep(unsigned int max_payload,
1351 union eth1394_hdr *hdr,
1352 u16 dg_size, u16 dgl)
1354 unsigned int adj_max_payload =
1355 max_payload - hdr_type_len[ETH1394_HDR_LF_UF];
1357 /* Does it all fit in one packet? */
1358 if (dg_size <= adj_max_payload) {
1359 hdr->uf.lf = ETH1394_HDR_LF_UF;
1360 hdr->uf.ether_type = proto;
1362 hdr->ff.lf = ETH1394_HDR_LF_FF;
1363 hdr->ff.ether_type = proto;
1364 hdr->ff.dg_size = dg_size - 1;
1366 adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_FF];
1368 return (dg_size + adj_max_payload - 1) / adj_max_payload;
1371 static unsigned int ether1394_encapsulate(struct sk_buff *skb,
1372 unsigned int max_payload,
1373 union eth1394_hdr *hdr)
1375 union eth1394_hdr *bufhdr;
1376 int ftype = hdr->common.lf;
1377 int hdrsz = hdr_type_len[ftype];
1378 unsigned int adj_max_payload = max_payload - hdrsz;
1381 case ETH1394_HDR_LF_UF:
1382 bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz);
1383 bufhdr->words.word1 = htons(hdr->words.word1);
1384 bufhdr->words.word2 = hdr->words.word2;
1387 case ETH1394_HDR_LF_FF:
1388 bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz);
1389 bufhdr->words.word1 = htons(hdr->words.word1);
1390 bufhdr->words.word2 = hdr->words.word2;
1391 bufhdr->words.word3 = htons(hdr->words.word3);
1392 bufhdr->words.word4 = 0;
1394 /* Set frag type here for future interior fragments */
1395 hdr->common.lf = ETH1394_HDR_LF_IF;
1400 hdr->sf.fg_off += adj_max_payload;
1401 bufhdr = (union eth1394_hdr *)skb_pull(skb, adj_max_payload);
1402 if (max_payload >= skb->len)
1403 hdr->common.lf = ETH1394_HDR_LF_LF;
1404 bufhdr->words.word1 = htons(hdr->words.word1);
1405 bufhdr->words.word2 = htons(hdr->words.word2);
1406 bufhdr->words.word3 = htons(hdr->words.word3);
1407 bufhdr->words.word4 = 0;
1409 return min(max_payload, skb->len);
1412 static struct hpsb_packet *ether1394_alloc_common_packet(struct hpsb_host *host)
1414 struct hpsb_packet *p;
1416 p = hpsb_alloc_packet(0);
1419 p->generation = get_hpsb_generation(host);
1420 p->type = hpsb_async;
1425 static int ether1394_prep_write_packet(struct hpsb_packet *p,
1426 struct hpsb_host *host, nodeid_t node,
1427 u64 addr, void *data, int tx_len)
1431 if (hpsb_get_tlabel(p))
1434 p->tcode = TCODE_WRITEB;
1435 p->header_size = 16;
1436 p->expect_response = 1;
1438 p->node_id << 16 | p->tlabel << 10 | 1 << 8 | TCODE_WRITEB << 4;
1439 p->header[1] = host->node_id << 16 | addr >> 32;
1440 p->header[2] = addr & 0xffffffff;
1441 p->header[3] = tx_len << 16;
1442 p->data_size = (tx_len + 3) & ~3;
1448 static void ether1394_prep_gasp_packet(struct hpsb_packet *p,
1449 struct eth1394_priv *priv,
1450 struct sk_buff *skb, int length)
1453 p->tcode = TCODE_STREAM_DATA;
1455 p->header[0] = length << 16 | 3 << 14 | priv->broadcast_channel << 8 |
1456 TCODE_STREAM_DATA << 4;
1457 p->data_size = length;
1458 p->data = (quadlet_t *)skb->data - 2;
1459 p->data[0] = cpu_to_be32(priv->host->node_id << 16 |
1460 ETHER1394_GASP_SPECIFIER_ID_HI);
1461 p->data[1] = cpu_to_be32(ETHER1394_GASP_SPECIFIER_ID_LO << 24 |
1462 ETHER1394_GASP_VERSION);
1464 p->speed_code = priv->bc_sspd;
1466 /* prevent hpsb_send_packet() from overriding our speed code */
1467 p->node_id = LOCAL_BUS | ALL_NODES;
1470 static void ether1394_free_packet(struct hpsb_packet *packet)
1472 if (packet->tcode != TCODE_STREAM_DATA)
1473 hpsb_free_tlabel(packet);
1474 hpsb_free_packet(packet);
1477 static void ether1394_complete_cb(void *__ptask);
1479 static int ether1394_send_packet(struct packet_task *ptask, unsigned int tx_len)
1481 struct eth1394_priv *priv = ptask->priv;
1482 struct hpsb_packet *packet = NULL;
1484 packet = ether1394_alloc_common_packet(priv->host);
1488 if (ptask->tx_type == ETH1394_GASP) {
1489 int length = tx_len + 2 * sizeof(quadlet_t);
1491 ether1394_prep_gasp_packet(packet, priv, ptask->skb, length);
1492 } else if (ether1394_prep_write_packet(packet, priv->host,
1494 ptask->addr, ptask->skb->data,
1496 hpsb_free_packet(packet);
1500 ptask->packet = packet;
1501 hpsb_set_packet_complete_task(ptask->packet, ether1394_complete_cb,
1504 if (hpsb_send_packet(packet) < 0) {
1505 ether1394_free_packet(packet);
1512 /* Task function to be run when a datagram transmission is completed */
1513 static void ether1394_dg_complete(struct packet_task *ptask, int fail)
1515 struct sk_buff *skb = ptask->skb;
1516 struct eth1394_priv *priv = netdev_priv(skb->dev);
1517 unsigned long flags;
1520 spin_lock_irqsave(&priv->lock, flags);
1522 priv->stats.tx_dropped++;
1523 priv->stats.tx_errors++;
1525 priv->stats.tx_bytes += skb->len;
1526 priv->stats.tx_packets++;
1528 spin_unlock_irqrestore(&priv->lock, flags);
1530 dev_kfree_skb_any(skb);
1531 kmem_cache_free(packet_task_cache, ptask);
1534 /* Callback for when a packet has been sent and the status of that packet is
1536 static void ether1394_complete_cb(void *__ptask)
1538 struct packet_task *ptask = (struct packet_task *)__ptask;
1539 struct hpsb_packet *packet = ptask->packet;
1542 if (packet->tcode != TCODE_STREAM_DATA)
1543 fail = hpsb_packet_success(packet);
1545 ether1394_free_packet(packet);
1547 ptask->outstanding_pkts--;
1548 if (ptask->outstanding_pkts > 0 && !fail) {
1551 /* Add the encapsulation header to the fragment */
1552 tx_len = ether1394_encapsulate(ptask->skb, ptask->max_payload,
1554 err = ether1394_send_packet(ptask, tx_len);
1557 ETH1394_PRINT_G(KERN_ERR, "Out of tlabels\n");
1559 ether1394_dg_complete(ptask, 1);
1562 ether1394_dg_complete(ptask, fail);
1566 /* Transmit a packet (called by kernel) */
1567 static int ether1394_tx(struct sk_buff *skb, struct net_device *dev)
1569 struct eth1394hdr *eth;
1570 struct eth1394_priv *priv = netdev_priv(dev);
1572 unsigned long flags;
1574 eth1394_tx_type tx_type;
1575 unsigned int tx_len;
1576 unsigned int max_payload;
1579 struct packet_task *ptask;
1580 struct eth1394_node_ref *node;
1581 struct eth1394_node_info *node_info = NULL;
1583 ptask = kmem_cache_alloc(packet_task_cache, GFP_ATOMIC);
1587 /* XXX Ignore this for now. Noticed that when MacOSX is the IRM,
1588 * it does not set our validity bit. We need to compensate for
1589 * that somewhere else, but not in eth1394. */
1591 if ((priv->host->csr.broadcast_channel & 0xc0000000) != 0xc0000000)
1595 skb = skb_share_check(skb, GFP_ATOMIC);
1599 /* Get rid of the fake eth1394 header, but save a pointer */
1600 eth = (struct eth1394hdr *)skb->data;
1601 skb_pull(skb, ETH1394_HLEN);
1603 proto = eth->h_proto;
1606 /* Set the transmission type for the packet. ARP packets and IP
1607 * broadcast packets are sent via GASP. */
1608 if (memcmp(eth->h_dest, dev->broadcast, ETH1394_ALEN) == 0 ||
1609 proto == htons(ETH_P_ARP) ||
1610 (proto == htons(ETH_P_IP) &&
1611 IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) {
1612 tx_type = ETH1394_GASP;
1613 dest_node = LOCAL_BUS | ALL_NODES;
1614 max_payload = priv->bc_maxpayload - ETHER1394_GASP_OVERHEAD;
1615 BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD);
1617 if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF])
1620 __be64 guid = get_unaligned((u64 *)eth->h_dest);
1622 node = eth1394_find_node_guid(&priv->ip_node_list,
1628 (struct eth1394_node_info *)node->ud->device.driver_data;
1629 if (node_info->fifo == CSR1212_INVALID_ADDR_SPACE)
1632 dest_node = node->ud->ne->nodeid;
1633 max_payload = node_info->maxpayload;
1634 BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD);
1636 dgl = node_info->dgl;
1637 if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF])
1639 tx_type = ETH1394_WRREQ;
1642 /* If this is an ARP packet, convert it */
1643 if (proto == htons(ETH_P_ARP))
1644 ether1394_arp_to_1394arp(skb, dev);
1646 ptask->hdr.words.word1 = 0;
1647 ptask->hdr.words.word2 = 0;
1648 ptask->hdr.words.word3 = 0;
1649 ptask->hdr.words.word4 = 0;
1652 ptask->tx_type = tx_type;
1654 if (tx_type != ETH1394_GASP) {
1657 spin_lock_irqsave(&priv->lock, flags);
1658 addr = node_info->fifo;
1659 spin_unlock_irqrestore(&priv->lock, flags);
1662 ptask->dest_node = dest_node;
1665 ptask->tx_type = tx_type;
1666 ptask->max_payload = max_payload;
1667 ptask->outstanding_pkts = ether1394_encapsulate_prep(max_payload,
1668 proto, &ptask->hdr, dg_size, dgl);
1670 /* Add the encapsulation header to the fragment */
1671 tx_len = ether1394_encapsulate(skb, max_payload, &ptask->hdr);
1672 dev->trans_start = jiffies;
1673 if (ether1394_send_packet(ptask, tx_len)) {
1674 if (dest_node == (LOCAL_BUS | ALL_NODES))
1677 /* Most failures of ether1394_send_packet are recoverable. */
1678 netif_stop_queue(dev);
1679 priv->wake_node = dest_node;
1680 schedule_work(&priv->wake);
1681 kmem_cache_free(packet_task_cache, ptask);
1682 return NETDEV_TX_BUSY;
1685 return NETDEV_TX_OK;
1688 kmem_cache_free(packet_task_cache, ptask);
1693 spin_lock_irqsave(&priv->lock, flags);
1694 priv->stats.tx_dropped++;
1695 priv->stats.tx_errors++;
1696 spin_unlock_irqrestore(&priv->lock, flags);
1699 * FIXME: According to a patch from 2003-02-26, "returning non-zero
1700 * causes serious problems" here, allegedly. Before that patch,
1701 * -ERRNO was returned which is not appropriate under Linux 2.6.
1702 * Perhaps more needs to be done? Stop the queue in serious
1703 * conditions and restart it elsewhere?
1705 /* return NETDEV_TX_BUSY; */
1706 return NETDEV_TX_OK;
1709 static void ether1394_get_drvinfo(struct net_device *dev,
1710 struct ethtool_drvinfo *info)
1712 strcpy(info->driver, driver_name);
1713 strcpy(info->bus_info, "ieee1394"); /* FIXME provide more detail? */
1716 static struct ethtool_ops ethtool_ops = {
1717 .get_drvinfo = ether1394_get_drvinfo
1720 static int __init ether1394_init_module(void)
1724 packet_task_cache = kmem_cache_create("packet_task",
1725 sizeof(struct packet_task),
1727 if (!packet_task_cache)
1730 hpsb_register_highlevel(ð1394_highlevel);
1731 err = hpsb_register_protocol(ð1394_proto_driver);
1733 hpsb_unregister_highlevel(ð1394_highlevel);
1734 kmem_cache_destroy(packet_task_cache);
1739 static void __exit ether1394_exit_module(void)
1741 hpsb_unregister_protocol(ð1394_proto_driver);
1742 hpsb_unregister_highlevel(ð1394_highlevel);
1743 kmem_cache_destroy(packet_task_cache);
1746 module_init(ether1394_init_module);
1747 module_exit(ether1394_exit_module);