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 static char version[] __devinitdata =
92 "$Rev: 1224 $ Ben Collins <bcollins@debian.org>";
94 struct fragment_info {
95 struct list_head list;
100 struct partial_datagram {
101 struct list_head list;
107 struct list_head frag_info;
111 struct list_head list; /* partial datagram list per node */
112 unsigned int sz; /* partial datagram list size per node */
113 spinlock_t lock; /* partial datagram lock */
116 struct eth1394_host_info {
117 struct hpsb_host *host;
118 struct net_device *dev;
121 struct eth1394_node_ref {
122 struct unit_directory *ud;
123 struct list_head list;
126 struct eth1394_node_info {
127 u16 maxpayload; /* Max payload */
128 u8 sspd; /* Max speed */
129 u64 fifo; /* FIFO address */
130 struct pdg_list pdg; /* partial RX datagram lists */
131 int dgl; /* Outgoing datagram label */
134 /* Our ieee1394 highlevel driver */
135 #define ETH1394_DRIVER_NAME "ip1394"
136 static const char driver_name[] = ETH1394_DRIVER_NAME;
138 static kmem_cache_t *packet_task_cache;
140 static struct hpsb_highlevel eth1394_highlevel;
142 /* Use common.lf to determine header len */
143 static const int hdr_type_len[] = {
144 sizeof (struct eth1394_uf_hdr),
145 sizeof (struct eth1394_ff_hdr),
146 sizeof (struct eth1394_sf_hdr),
147 sizeof (struct eth1394_sf_hdr)
150 /* Change this to IEEE1394_SPEED_S100 to make testing easier */
151 #define ETH1394_SPEED_DEF IEEE1394_SPEED_MAX
153 /* For now, this needs to be 1500, so that XP works with us */
154 #define ETH1394_DATA_LEN ETH_DATA_LEN
156 static const u16 eth1394_speedto_maxpayload[] = {
157 /* S100, S200, S400, S800, S1600, S3200 */
158 512, 1024, 2048, 4096, 4096, 4096
161 MODULE_AUTHOR("Ben Collins (bcollins@debian.org)");
162 MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)");
163 MODULE_LICENSE("GPL");
165 /* The max_partial_datagrams parameter is the maximum number of fragmented
166 * datagrams per node that eth1394 will keep in memory. Providing an upper
167 * bound allows us to limit the amount of memory that partial datagrams
168 * consume in the event that some partial datagrams are never completed. This
169 * should probably change to a sysctl item or the like if possible.
171 MODULE_PARM(max_partial_datagrams, "i");
172 MODULE_PARM_DESC(max_partial_datagrams,
173 "Maximum number of partially received fragmented datagrams "
175 static int max_partial_datagrams = 25;
178 static int ether1394_header(struct sk_buff *skb, struct net_device *dev,
179 unsigned short type, void *daddr, void *saddr,
181 static int ether1394_rebuild_header(struct sk_buff *skb);
182 static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr);
183 static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh);
184 static void ether1394_header_cache_update(struct hh_cache *hh,
185 struct net_device *dev,
186 unsigned char * haddr);
187 static int ether1394_mac_addr(struct net_device *dev, void *p);
189 static inline void purge_partial_datagram(struct list_head *old);
190 static int ether1394_tx(struct sk_buff *skb, struct net_device *dev);
191 static void ether1394_iso(struct hpsb_iso *iso);
193 static int ether1394_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
194 static int ether1394_ethtool_ioctl(struct net_device *dev, void __user *useraddr);
196 static int ether1394_write(struct hpsb_host *host, int srcid, int destid,
197 quadlet_t *data, u64 addr, size_t len, u16 flags);
198 static void ether1394_add_host (struct hpsb_host *host);
199 static void ether1394_remove_host (struct hpsb_host *host);
200 static void ether1394_host_reset (struct hpsb_host *host);
202 /* Function for incoming 1394 packets */
203 static struct hpsb_address_ops addr_ops = {
204 .write = ether1394_write,
207 /* Ieee1394 highlevel driver functions */
208 static struct hpsb_highlevel eth1394_highlevel = {
210 .add_host = ether1394_add_host,
211 .remove_host = ether1394_remove_host,
212 .host_reset = ether1394_host_reset,
216 /* This is called after an "ifup" */
217 static int ether1394_open (struct net_device *dev)
219 struct eth1394_priv *priv = dev->priv;
222 /* Something bad happened, don't even try */
223 if (priv->bc_state == ETHER1394_BC_ERROR) {
224 /* we'll try again */
225 priv->iso = hpsb_iso_recv_init(priv->host,
226 ETHER1394_GASP_BUFFERS * 2 *
227 (1 << (priv->host->csr.max_rec +
229 ETHER1394_GASP_BUFFERS,
230 priv->broadcast_channel,
231 HPSB_ISO_DMA_PACKET_PER_BUFFER,
233 if (priv->iso == NULL) {
234 ETH1394_PRINT(KERN_ERR, dev->name,
235 "Could not allocate isochronous receive "
236 "context for the broadcast channel\n");
237 priv->bc_state = ETHER1394_BC_ERROR;
240 if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0)
241 priv->bc_state = ETHER1394_BC_STOPPED;
243 priv->bc_state = ETHER1394_BC_RUNNING;
250 netif_start_queue (dev);
254 /* This is called after an "ifdown" */
255 static int ether1394_stop (struct net_device *dev)
257 netif_stop_queue (dev);
261 /* Return statistics to the caller */
262 static struct net_device_stats *ether1394_stats (struct net_device *dev)
264 return &(((struct eth1394_priv *)dev->priv)->stats);
267 /* What to do if we timeout. I think a host reset is probably in order, so
268 * that's what we do. Should we increment the stat counters too? */
269 static void ether1394_tx_timeout (struct net_device *dev)
271 ETH1394_PRINT (KERN_ERR, dev->name, "Timeout, resetting host %s\n",
272 ((struct eth1394_priv *)(dev->priv))->host->driver->name);
274 highlevel_host_reset (((struct eth1394_priv *)(dev->priv))->host);
276 netif_wake_queue (dev);
279 static int ether1394_change_mtu(struct net_device *dev, int new_mtu)
281 struct eth1394_priv *priv = dev->priv;
283 if ((new_mtu < 68) ||
284 (new_mtu > min(ETH1394_DATA_LEN,
285 (int)((1 << (priv->host->csr.max_rec + 1)) -
286 (sizeof(union eth1394_hdr) +
287 ETHER1394_GASP_OVERHEAD)))))
294 /******************************************
295 * 1394 bus activity functions
296 ******************************************/
298 static struct eth1394_node_ref *eth1394_find_node(struct list_head *inl,
299 struct unit_directory *ud)
301 struct eth1394_node_ref *node;
303 list_for_each_entry(node, inl, list)
310 static struct eth1394_node_ref *eth1394_find_node_guid(struct list_head *inl,
313 struct eth1394_node_ref *node;
315 list_for_each_entry(node, inl, list)
316 if (node->ud->ne->guid == guid)
322 static struct eth1394_node_ref *eth1394_find_node_nodeid(struct list_head *inl,
325 struct eth1394_node_ref *node;
326 list_for_each_entry(node, inl, list) {
327 if (node->ud->ne->nodeid == nodeid)
334 static int eth1394_probe(struct device *dev)
336 struct unit_directory *ud;
337 struct eth1394_host_info *hi;
338 struct eth1394_priv *priv;
339 struct eth1394_node_ref *new_node;
340 struct eth1394_node_info *node_info;
342 ud = container_of(dev, struct unit_directory, device);
344 hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host);
348 new_node = kmalloc(sizeof(struct eth1394_node_ref),
349 in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
353 node_info = kmalloc(sizeof(struct eth1394_node_info),
354 in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
360 spin_lock_init(&node_info->pdg.lock);
361 INIT_LIST_HEAD(&node_info->pdg.list);
362 node_info->pdg.sz = 0;
363 node_info->fifo = ETHER1394_INVALID_ADDR;
365 ud->device.driver_data = node_info;
368 priv = (struct eth1394_priv *)hi->dev->priv;
369 list_add_tail(&new_node->list, &priv->ip_node_list);
374 static int eth1394_remove(struct device *dev)
376 struct unit_directory *ud;
377 struct eth1394_host_info *hi;
378 struct eth1394_priv *priv;
379 struct eth1394_node_ref *old_node;
380 struct eth1394_node_info *node_info;
381 struct list_head *lh, *n;
384 ud = container_of(dev, struct unit_directory, device);
385 hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host);
389 priv = (struct eth1394_priv *)hi->dev->priv;
391 old_node = eth1394_find_node(&priv->ip_node_list, ud);
394 list_del(&old_node->list);
397 node_info = (struct eth1394_node_info*)ud->device.driver_data;
399 spin_lock_irqsave(&node_info->pdg.lock, flags);
400 /* The partial datagram list should be empty, but we'll just
401 * make sure anyway... */
402 list_for_each_safe(lh, n, &node_info->pdg.list) {
403 purge_partial_datagram(lh);
405 spin_unlock_irqrestore(&node_info->pdg.lock, flags);
408 ud->device.driver_data = NULL;
413 static int eth1394_update(struct unit_directory *ud)
415 struct eth1394_host_info *hi;
416 struct eth1394_priv *priv;
417 struct eth1394_node_ref *node;
418 struct eth1394_node_info *node_info;
420 hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host);
424 priv = (struct eth1394_priv *)hi->dev->priv;
426 node = eth1394_find_node(&priv->ip_node_list, ud);
429 node = kmalloc(sizeof(struct eth1394_node_ref),
430 in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
434 node_info = kmalloc(sizeof(struct eth1394_node_info),
435 in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
441 spin_lock_init(&node_info->pdg.lock);
442 INIT_LIST_HEAD(&node_info->pdg.list);
443 node_info->pdg.sz = 0;
445 ud->device.driver_data = node_info;
448 priv = (struct eth1394_priv *)hi->dev->priv;
449 list_add_tail(&node->list, &priv->ip_node_list);
456 static struct ieee1394_device_id eth1394_id_table[] = {
458 .match_flags = (IEEE1394_MATCH_SPECIFIER_ID |
459 IEEE1394_MATCH_VERSION),
460 .specifier_id = ETHER1394_GASP_SPECIFIER_ID,
461 .version = ETHER1394_GASP_VERSION,
466 MODULE_DEVICE_TABLE(ieee1394, eth1394_id_table);
468 static struct hpsb_protocol_driver eth1394_proto_driver = {
469 .name = "IPv4 over 1394 Driver",
470 .id_table = eth1394_id_table,
471 .update = eth1394_update,
473 .name = ETH1394_DRIVER_NAME,
474 .bus = &ieee1394_bus_type,
475 .probe = eth1394_probe,
476 .remove = eth1394_remove,
481 static void ether1394_reset_priv (struct net_device *dev, int set_mtu)
485 struct eth1394_priv *priv = dev->priv;
486 struct hpsb_host *host = priv->host;
487 u64 guid = *((u64*)&(host->csr.rom->bus_info_data[3]));
488 u16 maxpayload = 1 << (host->csr.max_rec + 1);
489 int max_speed = IEEE1394_SPEED_MAX;
491 spin_lock_irqsave (&priv->lock, flags);
493 memset(priv->ud_list, 0, sizeof(struct node_entry*) * ALL_NODES);
494 priv->bc_maxpayload = 512;
496 /* Determine speed limit */
497 for (i = 0; i < host->node_count; i++)
498 if (max_speed > host->speed_map[NODEID_TO_NODE(host->node_id) *
500 max_speed = host->speed_map[NODEID_TO_NODE(host->node_id) *
502 priv->bc_sspd = max_speed;
504 /* We'll use our maxpayload as the default mtu */
506 dev->mtu = min(ETH1394_DATA_LEN,
508 (sizeof(union eth1394_hdr) +
509 ETHER1394_GASP_OVERHEAD)));
511 /* Set our hardware address while we're at it */
512 *(u64*)dev->dev_addr = guid;
513 *(u64*)dev->broadcast = ~0x0ULL;
516 spin_unlock_irqrestore (&priv->lock, flags);
519 /* This function is called right before register_netdev */
520 static void ether1394_init_dev (struct net_device *dev)
523 dev->open = ether1394_open;
524 dev->stop = ether1394_stop;
525 dev->hard_start_xmit = ether1394_tx;
526 dev->get_stats = ether1394_stats;
527 dev->tx_timeout = ether1394_tx_timeout;
528 dev->change_mtu = ether1394_change_mtu;
530 dev->hard_header = ether1394_header;
531 dev->rebuild_header = ether1394_rebuild_header;
532 dev->hard_header_cache = ether1394_header_cache;
533 dev->header_cache_update= ether1394_header_cache_update;
534 dev->hard_header_parse = ether1394_header_parse;
535 dev->set_mac_address = ether1394_mac_addr;
536 dev->do_ioctl = ether1394_do_ioctl;
539 dev->watchdog_timeo = ETHER1394_TIMEOUT;
540 dev->flags = IFF_BROADCAST | IFF_MULTICAST;
541 dev->features = NETIF_F_HIGHDMA;
542 dev->addr_len = ETH1394_ALEN;
543 dev->hard_header_len = ETH1394_HLEN;
544 dev->type = ARPHRD_IEEE1394;
546 ether1394_reset_priv (dev, 1);
550 * This function is called every time a card is found. It is generally called
551 * when the module is installed. This is where we add all of our ethernet
552 * devices. One for each host.
554 static void ether1394_add_host (struct hpsb_host *host)
556 struct eth1394_host_info *hi = NULL;
557 struct net_device *dev = NULL;
558 struct eth1394_priv *priv;
559 static int version_printed = 0;
562 if (!(host->config_roms & HPSB_CONFIG_ROM_ENTRY_IP1394))
565 fifo_addr = hpsb_allocate_and_register_addrspace(ð1394_highlevel,
568 ETHER1394_REGION_ADDR_LEN,
569 ETHER1394_REGION_ADDR_LEN,
571 if (fifo_addr == ~0ULL)
574 if (version_printed++ == 0)
575 ETH1394_PRINT_G (KERN_INFO, "%s\n", version);
577 /* We should really have our own alloc_hpsbdev() function in
578 * net_init.c instead of calling the one for ethernet then hijacking
579 * it for ourselves. That way we'd be a real networking device. */
580 dev = alloc_etherdev(sizeof (struct eth1394_priv));
583 ETH1394_PRINT_G (KERN_ERR, "Out of memory trying to allocate "
584 "etherdevice for IEEE 1394 device %s-%d\n",
585 host->driver->name, host->id);
589 SET_MODULE_OWNER(dev);
591 priv = (struct eth1394_priv *)dev->priv;
593 INIT_LIST_HEAD(&priv->ip_node_list);
595 spin_lock_init(&priv->lock);
597 priv->local_fifo = fifo_addr;
599 hi = hpsb_create_hostinfo(ð1394_highlevel, host, sizeof(*hi));
602 ETH1394_PRINT_G (KERN_ERR, "Out of memory trying to create "
603 "hostinfo for IEEE 1394 device %s-%d\n",
604 host->driver->name, host->id);
608 ether1394_init_dev(dev);
610 if (register_netdev (dev)) {
611 ETH1394_PRINT (KERN_ERR, dev->name, "Error registering network driver\n");
615 ETH1394_PRINT (KERN_ERR, dev->name, "IEEE-1394 IPv4 over 1394 Ethernet (fw-host%d)\n",
621 /* Ignore validity in hopes that it will be set in the future. It'll
622 * be checked when the eth device is opened. */
623 priv->broadcast_channel = host->csr.broadcast_channel & 0x3f;
625 priv->iso = hpsb_iso_recv_init(host, (ETHER1394_GASP_BUFFERS * 2 *
626 (1 << (host->csr.max_rec + 1))),
627 ETHER1394_GASP_BUFFERS,
628 priv->broadcast_channel,
629 HPSB_ISO_DMA_PACKET_PER_BUFFER,
631 if (priv->iso == NULL) {
632 ETH1394_PRINT(KERN_ERR, dev->name,
633 "Could not allocate isochronous receive context "
634 "for the broadcast channel\n");
635 priv->bc_state = ETHER1394_BC_ERROR;
637 if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0)
638 priv->bc_state = ETHER1394_BC_STOPPED;
640 priv->bc_state = ETHER1394_BC_RUNNING;
649 hpsb_destroy_hostinfo(ð1394_highlevel, host);
654 /* Remove a card from our list */
655 static void ether1394_remove_host (struct hpsb_host *host)
657 struct eth1394_host_info *hi;
659 hi = hpsb_get_hostinfo(ð1394_highlevel, host);
661 struct eth1394_priv *priv = (struct eth1394_priv *)hi->dev->priv;
663 hpsb_unregister_addrspace(ð1394_highlevel, host,
666 if (priv->iso != NULL)
667 hpsb_iso_shutdown(priv->iso);
670 unregister_netdev (hi->dev);
671 free_netdev(hi->dev);
678 /* A reset has just arisen */
679 static void ether1394_host_reset (struct hpsb_host *host)
681 struct eth1394_host_info *hi;
682 struct eth1394_priv *priv;
683 struct net_device *dev;
684 struct list_head *lh, *n;
685 struct eth1394_node_ref *node;
686 struct eth1394_node_info *node_info;
689 hi = hpsb_get_hostinfo(ð1394_highlevel, host);
691 /* This can happen for hosts that we don't use */
696 priv = (struct eth1394_priv *)dev->priv;
698 /* Reset our private host data, but not our mtu */
699 netif_stop_queue (dev);
700 ether1394_reset_priv (dev, 0);
702 list_for_each_entry(node, &priv->ip_node_list, list) {
703 node_info = (struct eth1394_node_info*)node->ud->device.driver_data;
705 spin_lock_irqsave(&node_info->pdg.lock, flags);
707 list_for_each_safe(lh, n, &node_info->pdg.list) {
708 purge_partial_datagram(lh);
711 INIT_LIST_HEAD(&(node_info->pdg.list));
712 node_info->pdg.sz = 0;
714 spin_unlock_irqrestore(&node_info->pdg.lock, flags);
717 netif_wake_queue (dev);
720 /******************************************
721 * HW Header net device functions
722 ******************************************/
723 /* These functions have been adapted from net/ethernet/eth.c */
726 /* Create a fake MAC header for an arbitrary protocol layer.
727 * saddr=NULL means use device source address
728 * daddr=NULL means leave destination address (eg unresolved arp). */
729 static int ether1394_header(struct sk_buff *skb, struct net_device *dev,
730 unsigned short type, void *daddr, void *saddr,
733 struct eth1394hdr *eth = (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN);
735 eth->h_proto = htons(type);
737 if (dev->flags & (IFF_LOOPBACK|IFF_NOARP)) {
738 memset(eth->h_dest, 0, dev->addr_len);
739 return(dev->hard_header_len);
743 memcpy(eth->h_dest,daddr,dev->addr_len);
744 return dev->hard_header_len;
747 return -dev->hard_header_len;
752 /* Rebuild the faked MAC header. This is called after an ARP
753 * (or in future other address resolution) has completed on this
754 * sk_buff. We now let ARP fill in the other fields.
756 * This routine CANNOT use cached dst->neigh!
757 * Really, it is used only when dst->neigh is wrong.
759 static int ether1394_rebuild_header(struct sk_buff *skb)
761 struct eth1394hdr *eth = (struct eth1394hdr *)skb->data;
762 struct net_device *dev = skb->dev;
764 switch (eth->h_proto) {
767 case __constant_htons(ETH_P_IP):
768 return arp_find((unsigned char*)ð->h_dest, skb);
771 ETH1394_PRINT(KERN_DEBUG, dev->name,
772 "unable to resolve type %04x addresses.\n",
780 static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr)
782 struct net_device *dev = skb->dev;
783 memcpy(haddr, dev->dev_addr, ETH1394_ALEN);
788 static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh)
790 unsigned short type = hh->hh_type;
791 struct eth1394hdr *eth = (struct eth1394hdr*)(((u8*)hh->hh_data) +
792 (16 - ETH1394_HLEN));
793 struct net_device *dev = neigh->dev;
795 if (type == __constant_htons(ETH_P_802_3)) {
800 memcpy(eth->h_dest, neigh->ha, dev->addr_len);
802 hh->hh_len = ETH1394_HLEN;
806 /* Called by Address Resolution module to notify changes in address. */
807 static void ether1394_header_cache_update(struct hh_cache *hh,
808 struct net_device *dev,
809 unsigned char * haddr)
811 memcpy(((u8*)hh->hh_data) + (16 - ETH1394_HLEN), haddr, dev->addr_len);
814 static int ether1394_mac_addr(struct net_device *dev, void *p)
816 if (netif_running(dev))
819 /* Not going to allow setting the MAC address, we really need to use
820 * the real one supplied by the hardware */
826 /******************************************
827 * Datagram reception code
828 ******************************************/
830 /* Copied from net/ethernet/eth.c */
831 static inline u16 ether1394_type_trans(struct sk_buff *skb,
832 struct net_device *dev)
834 struct eth1394hdr *eth;
837 skb->mac.raw = skb->data;
838 skb_pull (skb, ETH1394_HLEN);
839 eth = (struct eth1394hdr*)skb->mac.raw;
841 if (*eth->h_dest & 1) {
842 if (memcmp(eth->h_dest, dev->broadcast, dev->addr_len)==0)
843 skb->pkt_type = PACKET_BROADCAST;
846 skb->pkt_type = PACKET_MULTICAST;
849 if (memcmp(eth->h_dest, dev->dev_addr, dev->addr_len))
850 skb->pkt_type = PACKET_OTHERHOST;
853 if (ntohs (eth->h_proto) >= 1536)
858 if (*(unsigned short *)rawp == 0xFFFF)
859 return htons (ETH_P_802_3);
861 return htons (ETH_P_802_2);
864 /* Parse an encapsulated IP1394 header into an ethernet frame packet.
865 * We also perform ARP translation here, if need be. */
866 static inline u16 ether1394_parse_encap(struct sk_buff *skb,
867 struct net_device *dev,
868 nodeid_t srcid, nodeid_t destid,
871 struct eth1394_priv *priv = dev->priv;
873 unsigned short ret = 0;
875 /* Setup our hw addresses. We use these to build the
876 * ethernet header. */
877 if (destid == (LOCAL_BUS | ALL_NODES))
878 dest_hw = ~0ULL; /* broadcast */
880 dest_hw = cpu_to_be64((((u64)priv->host->csr.guid_hi) << 32) |
881 priv->host->csr.guid_lo);
883 /* If this is an ARP packet, convert it. First, we want to make
884 * use of some of the fields, since they tell us a little bit
885 * about the sending machine. */
886 if (ether_type == __constant_htons (ETH_P_ARP)) {
887 struct eth1394_arp *arp1394 = (struct eth1394_arp*)skb->data;
888 struct arphdr *arp = (struct arphdr *)skb->data;
889 unsigned char *arp_ptr = (unsigned char *)(arp + 1);
890 u64 fifo_addr = (u64)ntohs(arp1394->fifo_hi) << 32 |
891 ntohl(arp1394->fifo_lo);
892 u8 max_rec = min(priv->host->csr.max_rec,
893 (u8)(arp1394->max_rec));
894 int sspd = arp1394->sspd;
896 struct eth1394_node_ref *node;
897 struct eth1394_node_info *node_info;
899 /* Sanity check. MacOSX seems to be sending us 131 in this
900 * field (atleast on my Panther G5). Not sure why. */
901 if (sspd > 5 || sspd < 0)
904 maxpayload = min(eth1394_speedto_maxpayload[sspd], (u16)(1 << (max_rec + 1)));
906 node = eth1394_find_node_guid(&priv->ip_node_list,
907 be64_to_cpu(arp1394->s_uniq_id));
912 node_info = (struct eth1394_node_info*)node->ud->device.driver_data;
914 /* Update our speed/payload/fifo_offset table */
915 node_info->maxpayload = maxpayload;
916 node_info->sspd = sspd;
917 node_info->fifo = fifo_addr;
919 /* Now that we're done with the 1394 specific stuff, we'll
920 * need to alter some of the data. Believe it or not, all
921 * that needs to be done is sender_IP_address needs to be
922 * moved, the destination hardware address get stuffed
923 * in and the hardware address length set to 8.
925 * IMPORTANT: The code below overwrites 1394 specific data
926 * needed above so keep the munging of the data for the
927 * higher level IP stack last. */
930 arp_ptr += arp->ar_hln; /* skip over sender unique id */
931 *(u32*)arp_ptr = arp1394->sip; /* move sender IP addr */
932 arp_ptr += arp->ar_pln; /* skip over sender IP addr */
935 /* just set ARP req target unique ID to 0 */
936 *((u64*)arp_ptr) = 0;
938 *((u64*)arp_ptr) = *((u64*)dev->dev_addr);
941 /* Now add the ethernet header. */
942 if (dev->hard_header (skb, dev, __constant_ntohs (ether_type),
943 &dest_hw, NULL, skb->len) >= 0)
944 ret = ether1394_type_trans(skb, dev);
949 static inline int fragment_overlap(struct list_head *frag_list, int offset, int len)
951 struct fragment_info *fi;
953 list_for_each_entry(fi, frag_list, list) {
954 if ( ! ((offset > (fi->offset + fi->len - 1)) ||
955 ((offset + len - 1) < fi->offset)))
961 static inline struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl)
963 struct partial_datagram *pd;
965 list_for_each_entry(pd, pdgl, list) {
972 /* Assumes that new fragment does not overlap any existing fragments */
973 static inline int new_fragment(struct list_head *frag_info, int offset, int len)
975 struct list_head *lh;
976 struct fragment_info *fi, *fi2, *new;
978 list_for_each(lh, frag_info) {
979 fi = list_entry(lh, struct fragment_info, list);
980 if ((fi->offset + fi->len) == offset) {
981 /* The new fragment can be tacked on to the end */
983 /* Did the new fragment plug a hole? */
984 fi2 = list_entry(lh->next, struct fragment_info, list);
985 if ((fi->offset + fi->len) == fi2->offset) {
986 /* glue fragments together */
992 } else if ((offset + len) == fi->offset) {
993 /* The new fragment can be tacked on to the beginning */
996 /* Did the new fragment plug a hole? */
997 fi2 = list_entry(lh->prev, struct fragment_info, list);
998 if ((fi2->offset + fi2->len) == fi->offset) {
999 /* glue fragments together */
1000 fi2->len += fi->len;
1005 } else if (offset > (fi->offset + fi->len)) {
1007 } else if ((offset + len) < fi->offset) {
1013 new = kmalloc(sizeof(struct fragment_info), GFP_ATOMIC);
1017 new->offset = offset;
1020 list_add(&new->list, lh);
1025 static inline int new_partial_datagram(struct net_device *dev,
1026 struct list_head *pdgl, int dgl,
1027 int dg_size, char *frag_buf,
1028 int frag_off, int frag_len)
1030 struct partial_datagram *new;
1032 new = kmalloc(sizeof(struct partial_datagram), GFP_ATOMIC);
1036 INIT_LIST_HEAD(&new->frag_info);
1038 if (new_fragment(&new->frag_info, frag_off, frag_len) < 0) {
1044 new->dg_size = dg_size;
1046 new->skb = dev_alloc_skb(dg_size + dev->hard_header_len + 15);
1048 struct fragment_info *fi = list_entry(new->frag_info.next,
1049 struct fragment_info,
1056 skb_reserve(new->skb, (dev->hard_header_len + 15) & ~15);
1057 new->pbuf = skb_put(new->skb, dg_size);
1058 memcpy(new->pbuf + frag_off, frag_buf, frag_len);
1060 list_add(&new->list, pdgl);
1065 static inline int update_partial_datagram(struct list_head *pdgl, struct list_head *lh,
1066 char *frag_buf, int frag_off, int frag_len)
1068 struct partial_datagram *pd = list_entry(lh, struct partial_datagram, list);
1070 if (new_fragment(&pd->frag_info, frag_off, frag_len) < 0) {
1074 memcpy(pd->pbuf + frag_off, frag_buf, frag_len);
1076 /* Move list entry to beginnig of list so that oldest partial
1077 * datagrams percolate to the end of the list */
1084 static inline void purge_partial_datagram(struct list_head *old)
1086 struct partial_datagram *pd = list_entry(old, struct partial_datagram, list);
1087 struct list_head *lh, *n;
1089 list_for_each_safe(lh, n, &pd->frag_info) {
1090 struct fragment_info *fi = list_entry(lh, struct fragment_info, list);
1099 static inline int is_datagram_complete(struct list_head *lh, int dg_size)
1101 struct partial_datagram *pd = list_entry(lh, struct partial_datagram, list);
1102 struct fragment_info *fi = list_entry(pd->frag_info.next,
1103 struct fragment_info, list);
1105 return (fi->len == dg_size);
1108 /* Packet reception. We convert the IP1394 encapsulation header to an
1109 * ethernet header, and fill it with some of our other fields. This is
1110 * an incoming packet from the 1394 bus. */
1111 static int ether1394_data_handler(struct net_device *dev, int srcid, int destid,
1114 struct sk_buff *skb;
1115 unsigned long flags;
1116 struct eth1394_priv *priv = (struct eth1394_priv *)dev->priv;
1117 union eth1394_hdr *hdr = (union eth1394_hdr *)buf;
1118 u16 ether_type = 0; /* initialized to clear warning */
1120 struct unit_directory *ud = priv->ud_list[NODEID_TO_NODE(srcid)];
1121 struct eth1394_node_info *node_info;
1124 struct eth1394_node_ref *node;
1125 node = eth1394_find_node_nodeid(&priv->ip_node_list, srcid);
1127 HPSB_PRINT(KERN_ERR, "ether1394 rx: sender nodeid "
1128 "lookup failure: " NODE_BUS_FMT,
1129 NODE_BUS_ARGS(priv->host, srcid));
1130 priv->stats.rx_dropped++;
1135 priv->ud_list[NODEID_TO_NODE(srcid)] = ud;
1138 node_info = (struct eth1394_node_info*)ud->device.driver_data;
1140 /* First, did we receive a fragmented or unfragmented datagram? */
1141 hdr->words.word1 = ntohs(hdr->words.word1);
1143 hdr_len = hdr_type_len[hdr->common.lf];
1145 if (hdr->common.lf == ETH1394_HDR_LF_UF) {
1146 /* An unfragmented datagram has been received by the ieee1394
1147 * bus. Build an skbuff around it so we can pass it to the
1148 * high level network layer. */
1150 skb = dev_alloc_skb(len + dev->hard_header_len + 15);
1152 HPSB_PRINT (KERN_ERR, "ether1394 rx: low on mem\n");
1153 priv->stats.rx_dropped++;
1156 skb_reserve(skb, (dev->hard_header_len + 15) & ~15);
1157 memcpy(skb_put(skb, len - hdr_len), buf + hdr_len, len - hdr_len);
1158 ether_type = hdr->uf.ether_type;
1160 /* A datagram fragment has been received, now the fun begins. */
1162 struct list_head *pdgl, *lh;
1163 struct partial_datagram *pd;
1165 int fg_len = len - hdr_len;
1169 struct pdg_list *pdg = &(node_info->pdg);
1171 hdr->words.word3 = ntohs(hdr->words.word3);
1172 /* The 4th header word is reserved so no need to do ntohs() */
1174 if (hdr->common.lf == ETH1394_HDR_LF_FF) {
1175 ether_type = hdr->ff.ether_type;
1177 dg_size = hdr->ff.dg_size + 1;
1180 hdr->words.word2 = ntohs(hdr->words.word2);
1182 dg_size = hdr->sf.dg_size + 1;
1183 fg_off = hdr->sf.fg_off;
1185 spin_lock_irqsave(&pdg->lock, flags);
1187 pdgl = &(pdg->list);
1188 lh = find_partial_datagram(pdgl, dgl);
1191 if (pdg->sz == max_partial_datagrams) {
1192 /* remove the oldest */
1193 purge_partial_datagram(pdgl->prev);
1197 retval = new_partial_datagram(dev, pdgl, dgl, dg_size,
1198 buf + hdr_len, fg_off,
1201 spin_unlock_irqrestore(&pdg->lock, flags);
1205 lh = find_partial_datagram(pdgl, dgl);
1207 struct partial_datagram *pd;
1209 pd = list_entry(lh, struct partial_datagram, list);
1211 if (fragment_overlap(&pd->frag_info, fg_off, fg_len)) {
1212 /* Overlapping fragments, obliterate old
1213 * datagram and start new one. */
1214 purge_partial_datagram(lh);
1215 retval = new_partial_datagram(dev, pdgl, dgl,
1221 spin_unlock_irqrestore(&pdg->lock, flags);
1225 retval = update_partial_datagram(pdgl, lh,
1229 /* Couldn't save off fragment anyway
1230 * so might as well obliterate the
1232 purge_partial_datagram(lh);
1234 spin_unlock_irqrestore(&pdg->lock, flags);
1237 } /* fragment overlap */
1238 } /* new datagram or add to existing one */
1240 pd = list_entry(lh, struct partial_datagram, list);
1242 if (hdr->common.lf == ETH1394_HDR_LF_FF) {
1243 pd->ether_type = ether_type;
1246 if (is_datagram_complete(lh, dg_size)) {
1247 ether_type = pd->ether_type;
1249 skb = skb_get(pd->skb);
1250 purge_partial_datagram(lh);
1251 spin_unlock_irqrestore(&pdg->lock, flags);
1253 /* Datagram is not complete, we're done for the
1255 spin_unlock_irqrestore(&pdg->lock, flags);
1258 } /* unframgented datagram or fragmented one */
1260 /* Write metadata, and then pass to the receive level */
1262 skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */
1264 /* Parse the encapsulation header. This actually does the job of
1265 * converting to an ethernet frame header, aswell as arp
1266 * conversion if needed. ARP conversion is easier in this
1267 * direction, since we are using ethernet as our backend. */
1268 skb->protocol = ether1394_parse_encap(skb, dev, srcid, destid,
1272 spin_lock_irqsave(&priv->lock, flags);
1273 if (!skb->protocol) {
1274 priv->stats.rx_errors++;
1275 priv->stats.rx_dropped++;
1276 dev_kfree_skb_any(skb);
1280 if (netif_rx(skb) == NET_RX_DROP) {
1281 priv->stats.rx_errors++;
1282 priv->stats.rx_dropped++;
1287 priv->stats.rx_packets++;
1288 priv->stats.rx_bytes += skb->len;
1291 if (netif_queue_stopped(dev))
1292 netif_wake_queue(dev);
1293 spin_unlock_irqrestore(&priv->lock, flags);
1295 dev->last_rx = jiffies;
1300 static int ether1394_write(struct hpsb_host *host, int srcid, int destid,
1301 quadlet_t *data, u64 addr, size_t len, u16 flags)
1303 struct eth1394_host_info *hi;
1305 hi = hpsb_get_hostinfo(ð1394_highlevel, host);
1307 ETH1394_PRINT_G(KERN_ERR, "Could not find net device for host %s\n",
1308 host->driver->name);
1309 return RCODE_ADDRESS_ERROR;
1312 if (ether1394_data_handler(hi->dev, srcid, destid, (char*)data, len))
1313 return RCODE_ADDRESS_ERROR;
1315 return RCODE_COMPLETE;
1318 static void ether1394_iso(struct hpsb_iso *iso)
1322 struct eth1394_host_info *hi;
1323 struct net_device *dev;
1324 struct eth1394_priv *priv;
1331 hi = hpsb_get_hostinfo(ð1394_highlevel, iso->host);
1333 ETH1394_PRINT_G(KERN_ERR, "Could not find net device for host %s\n",
1334 iso->host->driver->name);
1340 nready = hpsb_iso_n_ready(iso);
1341 for (i = 0; i < nready; i++) {
1342 struct hpsb_iso_packet_info *info =
1343 &iso->infos[(iso->first_packet + i) % iso->buf_packets];
1344 data = (quadlet_t*) (iso->data_buf.kvirt + info->offset);
1346 /* skip over GASP header */
1347 buf = (char *)data + 8;
1348 len = info->len - 8;
1350 specifier_id = (((be32_to_cpu(data[0]) & 0xffff) << 8) |
1351 ((be32_to_cpu(data[1]) & 0xff000000) >> 24));
1352 source_id = be32_to_cpu(data[0]) >> 16;
1354 priv = (struct eth1394_priv *)dev->priv;
1356 if (info->channel != (iso->host->csr.broadcast_channel & 0x3f) ||
1357 specifier_id != ETHER1394_GASP_SPECIFIER_ID) {
1358 /* This packet is not for us */
1361 ether1394_data_handler(dev, source_id, LOCAL_BUS | ALL_NODES,
1365 hpsb_iso_recv_release_packets(iso, i);
1367 dev->last_rx = jiffies;
1370 /******************************************
1371 * Datagram transmission code
1372 ******************************************/
1374 /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire
1375 * arphdr) is the same format as the ip1394 header, so they overlap. The rest
1376 * needs to be munged a bit. The remainder of the arphdr is formatted based
1377 * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to
1380 * Now that the EUI is used for the hardware address all we need to do to make
1381 * this work for 1394 is to insert 2 quadlets that contain max_rec size,
1382 * speed, and unicast FIFO address information between the sender_unique_id
1383 * and the IP addresses.
1385 static inline void ether1394_arp_to_1394arp(struct sk_buff *skb,
1386 struct net_device *dev)
1388 struct eth1394_priv *priv = (struct eth1394_priv *)(dev->priv);
1390 struct arphdr *arp = (struct arphdr *)skb->data;
1391 unsigned char *arp_ptr = (unsigned char *)(arp + 1);
1392 struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data;
1394 /* Believe it or not, all that need to happen is sender IP get moved
1395 * and set hw_addr_len, max_rec, sspd, fifo_hi and fifo_lo. */
1396 arp1394->hw_addr_len = 16;
1397 arp1394->sip = *(u32*)(arp_ptr + ETH1394_ALEN);
1398 arp1394->max_rec = priv->host->csr.max_rec;
1399 arp1394->sspd = priv->host->csr.lnk_spd;
1400 arp1394->fifo_hi = htons (priv->local_fifo >> 32);
1401 arp1394->fifo_lo = htonl (priv->local_fifo & ~0x0);
1406 /* We need to encapsulate the standard header with our own. We use the
1407 * ethernet header's proto for our own. */
1408 static inline unsigned int ether1394_encapsulate_prep(unsigned int max_payload,
1410 union eth1394_hdr *hdr,
1411 u16 dg_size, u16 dgl)
1413 unsigned int adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_UF];
1415 /* Does it all fit in one packet? */
1416 if (dg_size <= adj_max_payload) {
1417 hdr->uf.lf = ETH1394_HDR_LF_UF;
1418 hdr->uf.ether_type = proto;
1420 hdr->ff.lf = ETH1394_HDR_LF_FF;
1421 hdr->ff.ether_type = proto;
1422 hdr->ff.dg_size = dg_size - 1;
1424 adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_FF];
1426 return((dg_size + (adj_max_payload - 1)) / adj_max_payload);
1429 static inline unsigned int ether1394_encapsulate(struct sk_buff *skb,
1430 unsigned int max_payload,
1431 union eth1394_hdr *hdr)
1433 union eth1394_hdr *bufhdr;
1434 int ftype = hdr->common.lf;
1435 int hdrsz = hdr_type_len[ftype];
1436 unsigned int adj_max_payload = max_payload - hdrsz;
1439 case ETH1394_HDR_LF_UF:
1440 bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz);
1441 bufhdr->words.word1 = htons(hdr->words.word1);
1442 bufhdr->words.word2 = hdr->words.word2;
1445 case ETH1394_HDR_LF_FF:
1446 bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz);
1447 bufhdr->words.word1 = htons(hdr->words.word1);
1448 bufhdr->words.word2 = hdr->words.word2;
1449 bufhdr->words.word3 = htons(hdr->words.word3);
1450 bufhdr->words.word4 = 0;
1452 /* Set frag type here for future interior fragments */
1453 hdr->common.lf = ETH1394_HDR_LF_IF;
1458 hdr->sf.fg_off += adj_max_payload;
1459 bufhdr = (union eth1394_hdr *)skb_pull(skb, adj_max_payload);
1460 if (max_payload >= skb->len)
1461 hdr->common.lf = ETH1394_HDR_LF_LF;
1462 bufhdr->words.word1 = htons(hdr->words.word1);
1463 bufhdr->words.word2 = htons(hdr->words.word2);
1464 bufhdr->words.word3 = htons(hdr->words.word3);
1465 bufhdr->words.word4 = 0;
1468 return min(max_payload, skb->len);
1471 static inline struct hpsb_packet *ether1394_alloc_common_packet(struct hpsb_host *host)
1473 struct hpsb_packet *p;
1475 p = hpsb_alloc_packet(0);
1478 p->generation = get_hpsb_generation(host);
1479 p->type = hpsb_async;
1484 static inline int ether1394_prep_write_packet(struct hpsb_packet *p,
1485 struct hpsb_host *host,
1486 nodeid_t node, u64 addr,
1487 void * data, int tx_len)
1492 p->tcode = TCODE_WRITEB;
1493 p->header[1] = (host->node_id << 16) | (addr >> 32);
1494 p->header[2] = addr & 0xffffffff;
1496 p->header_size = 16;
1497 p->expect_response = 1;
1499 if (hpsb_get_tlabel(p)) {
1500 ETH1394_PRINT_G(KERN_ERR, "No more tlabels left while sending "
1501 "to node " NODE_BUS_FMT "\n", NODE_BUS_ARGS(host, node));
1504 p->header[0] = (p->node_id << 16) | (p->tlabel << 10)
1505 | (1 << 8) | (TCODE_WRITEB << 4);
1507 p->header[3] = tx_len << 16;
1508 p->data_size = (tx_len + 3) & ~3;
1509 p->data = (quadlet_t*)data;
1514 static inline void ether1394_prep_gasp_packet(struct hpsb_packet *p,
1515 struct eth1394_priv *priv,
1516 struct sk_buff *skb, int length)
1519 p->tcode = TCODE_STREAM_DATA;
1521 p->header[0] = (length << 16) | (3 << 14)
1522 | ((priv->broadcast_channel) << 8)
1523 | (TCODE_STREAM_DATA << 4);
1524 p->data_size = length;
1525 p->data = ((quadlet_t*)skb->data) - 2;
1526 p->data[0] = cpu_to_be32((priv->host->node_id << 16) |
1527 ETHER1394_GASP_SPECIFIER_ID_HI);
1528 p->data[1] = __constant_cpu_to_be32((ETHER1394_GASP_SPECIFIER_ID_LO << 24) |
1529 ETHER1394_GASP_VERSION);
1531 /* Setting the node id to ALL_NODES (not LOCAL_BUS | ALL_NODES)
1532 * prevents hpsb_send_packet() from setting the speed to an arbitrary
1533 * value based on packet->node_id if packet->node_id is not set. */
1534 p->node_id = ALL_NODES;
1535 p->speed_code = priv->bc_sspd;
1538 static inline void ether1394_free_packet(struct hpsb_packet *packet)
1540 if (packet->tcode != TCODE_STREAM_DATA)
1541 hpsb_free_tlabel(packet);
1542 hpsb_free_packet(packet);
1545 static void ether1394_complete_cb(void *__ptask);
1547 static int ether1394_send_packet(struct packet_task *ptask, unsigned int tx_len)
1549 struct eth1394_priv *priv = ptask->priv;
1550 struct hpsb_packet *packet = NULL;
1552 packet = ether1394_alloc_common_packet(priv->host);
1556 if (ptask->tx_type == ETH1394_GASP) {
1557 int length = tx_len + (2 * sizeof(quadlet_t));
1559 ether1394_prep_gasp_packet(packet, priv, ptask->skb, length);
1560 } else if (ether1394_prep_write_packet(packet, priv->host,
1562 ptask->addr, ptask->skb->data,
1564 hpsb_free_packet(packet);
1568 ptask->packet = packet;
1569 hpsb_set_packet_complete_task(ptask->packet, ether1394_complete_cb,
1572 if (hpsb_send_packet(packet) < 0) {
1573 ether1394_free_packet(packet);
1581 /* Task function to be run when a datagram transmission is completed */
1582 static inline void ether1394_dg_complete(struct packet_task *ptask, int fail)
1584 struct sk_buff *skb = ptask->skb;
1585 struct net_device *dev = skb->dev;
1586 struct eth1394_priv *priv = dev->priv;
1587 unsigned long flags;
1590 spin_lock_irqsave(&priv->lock, flags);
1592 priv->stats.tx_dropped++;
1593 priv->stats.tx_errors++;
1595 priv->stats.tx_bytes += skb->len;
1596 priv->stats.tx_packets++;
1598 spin_unlock_irqrestore(&priv->lock, flags);
1600 dev_kfree_skb_any(skb);
1601 kmem_cache_free(packet_task_cache, ptask);
1605 /* Callback for when a packet has been sent and the status of that packet is
1607 static void ether1394_complete_cb(void *__ptask)
1609 struct packet_task *ptask = (struct packet_task *)__ptask;
1610 struct hpsb_packet *packet = ptask->packet;
1613 if (packet->tcode != TCODE_STREAM_DATA)
1614 fail = hpsb_packet_success(packet);
1616 ether1394_free_packet(packet);
1618 ptask->outstanding_pkts--;
1619 if (ptask->outstanding_pkts > 0 && !fail) {
1622 /* Add the encapsulation header to the fragment */
1623 tx_len = ether1394_encapsulate(ptask->skb, ptask->max_payload,
1625 if (ether1394_send_packet(ptask, tx_len))
1626 ether1394_dg_complete(ptask, 1);
1628 ether1394_dg_complete(ptask, fail);
1634 /* Transmit a packet (called by kernel) */
1635 static int ether1394_tx (struct sk_buff *skb, struct net_device *dev)
1637 int kmflags = in_interrupt() ? GFP_ATOMIC : GFP_KERNEL;
1638 struct eth1394hdr *eth;
1639 struct eth1394_priv *priv = dev->priv;
1641 unsigned long flags;
1643 eth1394_tx_type tx_type;
1645 unsigned int tx_len;
1646 unsigned int max_payload;
1649 struct packet_task *ptask;
1650 struct eth1394_node_ref *node;
1651 struct eth1394_node_info *node_info = NULL;
1653 ptask = kmem_cache_alloc(packet_task_cache, kmflags);
1654 if (ptask == NULL) {
1659 /* XXX Ignore this for now. Noticed that when MacOSX is the IRM,
1660 * it does not set our validity bit. We need to compensate for
1661 * that somewhere else, but not in eth1394. */
1663 if ((priv->host->csr.broadcast_channel & 0xc0000000) != 0xc0000000) {
1669 if ((skb = skb_share_check (skb, kmflags)) == NULL) {
1674 /* Get rid of the fake eth1394 header, but save a pointer */
1675 eth = (struct eth1394hdr*)skb->data;
1676 skb_pull(skb, ETH1394_HLEN);
1678 proto = eth->h_proto;
1681 /* Set the transmission type for the packet. ARP packets and IP
1682 * broadcast packets are sent via GASP. */
1683 if (memcmp(eth->h_dest, dev->broadcast, ETH1394_ALEN) == 0 ||
1684 proto == __constant_htons(ETH_P_ARP) ||
1685 (proto == __constant_htons(ETH_P_IP) &&
1686 IN_MULTICAST(__constant_ntohl(skb->nh.iph->daddr)))) {
1687 tx_type = ETH1394_GASP;
1688 dest_node = LOCAL_BUS | ALL_NODES;
1689 max_payload = priv->bc_maxpayload - ETHER1394_GASP_OVERHEAD;
1690 BUG_ON(max_payload < (512 - ETHER1394_GASP_OVERHEAD));
1692 if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF])
1695 node = eth1394_find_node_guid(&priv->ip_node_list,
1696 be64_to_cpu(*(u64*)eth->h_dest));
1701 node_info = (struct eth1394_node_info*)node->ud->device.driver_data;
1702 if (node_info->fifo == ETHER1394_INVALID_ADDR) {
1707 dest_node = node->ud->ne->nodeid;
1708 max_payload = node_info->maxpayload;
1709 BUG_ON(max_payload < (512 - ETHER1394_GASP_OVERHEAD));
1711 dgl = node_info->dgl;
1712 if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF])
1714 tx_type = ETH1394_WRREQ;
1717 /* If this is an ARP packet, convert it */
1718 if (proto == __constant_htons (ETH_P_ARP))
1719 ether1394_arp_to_1394arp (skb, dev);
1721 ptask->hdr.words.word1 = 0;
1722 ptask->hdr.words.word2 = 0;
1723 ptask->hdr.words.word3 = 0;
1724 ptask->hdr.words.word4 = 0;
1727 ptask->tx_type = tx_type;
1729 if (tx_type != ETH1394_GASP) {
1732 spin_lock_irqsave(&priv->lock, flags);
1733 addr = node_info->fifo;
1734 spin_unlock_irqrestore(&priv->lock, flags);
1737 ptask->dest_node = dest_node;
1740 ptask->tx_type = tx_type;
1741 ptask->max_payload = max_payload;
1742 ptask->outstanding_pkts = ether1394_encapsulate_prep(max_payload, proto,
1743 &ptask->hdr, dg_size,
1746 /* Add the encapsulation header to the fragment */
1747 tx_len = ether1394_encapsulate(skb, max_payload, &ptask->hdr);
1748 dev->trans_start = jiffies;
1749 if (ether1394_send_packet(ptask, tx_len))
1752 netif_wake_queue(dev);
1756 kmem_cache_free(packet_task_cache, ptask);
1761 spin_lock_irqsave (&priv->lock, flags);
1762 priv->stats.tx_dropped++;
1763 priv->stats.tx_errors++;
1764 spin_unlock_irqrestore (&priv->lock, flags);
1766 if (netif_queue_stopped(dev))
1767 netif_wake_queue(dev);
1769 return 0; /* returning non-zero causes serious problems */
1772 static int ether1394_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1776 return ether1394_ethtool_ioctl(dev, ifr->ifr_data);
1778 case SIOCGMIIPHY: /* Get address of MII PHY in use. */
1779 case SIOCGMIIREG: /* Read MII PHY register. */
1780 case SIOCSMIIREG: /* Write MII PHY register. */
1788 static int ether1394_ethtool_ioctl(struct net_device *dev, void __user *useraddr)
1792 if (get_user(ethcmd, (u32 __user *)useraddr))
1796 case ETHTOOL_GDRVINFO: {
1797 struct ethtool_drvinfo info = { ETHTOOL_GDRVINFO };
1798 strcpy (info.driver, driver_name);
1799 strcpy (info.version, "$Rev: 1224 $");
1800 /* FIXME XXX provide sane businfo */
1801 strcpy (info.bus_info, "ieee1394");
1802 if (copy_to_user (useraddr, &info, sizeof (info)))
1808 case ETHTOOL_NWAY_RST:
1810 case ETHTOOL_GMSGLVL:
1811 case ETHTOOL_SMSGLVL:
1820 static int __init ether1394_init_module (void)
1822 packet_task_cache = kmem_cache_create("packet_task", sizeof(struct packet_task),
1825 /* Register ourselves as a highlevel driver */
1826 hpsb_register_highlevel(ð1394_highlevel);
1828 return hpsb_register_protocol(ð1394_proto_driver);
1831 static void __exit ether1394_exit_module (void)
1833 hpsb_unregister_protocol(ð1394_proto_driver);
1834 hpsb_unregister_highlevel(ð1394_highlevel);
1835 kmem_cache_destroy(packet_task_cache);
1838 module_init(ether1394_init_module);
1839 module_exit(ether1394_exit_module);