2 * IPv4 over IEEE 1394, per RFC 2734
4 * Copyright (C) 2009 Jay Fenlason <fenlason@redhat.com>
6 * based on eth1394 by Ben Collins et al
10 #include <linux/compiler.h>
11 #include <linux/delay.h>
12 #include <linux/device.h>
13 #include <linux/ethtool.h>
14 #include <linux/firewire.h>
15 #include <linux/firewire-constants.h>
16 #include <linux/highmem.h>
19 #include <linux/jiffies.h>
20 #include <linux/mod_devicetable.h>
21 #include <linux/module.h>
22 #include <linux/moduleparam.h>
23 #include <linux/mutex.h>
24 #include <linux/netdevice.h>
25 #include <linux/skbuff.h>
26 #include <linux/slab.h>
27 #include <linux/spinlock.h>
29 #include <asm/unaligned.h>
33 #define FWNET_MAX_FRAGMENTS 30 /* arbitrary, > TX queue depth */
34 #define FWNET_ISO_PAGE_COUNT (PAGE_SIZE < 16*1024 ? 4 : 2)
37 #define FWNET_MAX_QUEUED_DATAGRAMS 20 /* < 64 = number of tlabels */
38 #define FWNET_MIN_QUEUED_DATAGRAMS 10 /* should keep AT DMA busy enough */
39 #define FWNET_TX_QUEUE_LEN FWNET_MAX_QUEUED_DATAGRAMS /* ? */
41 #define IEEE1394_BROADCAST_CHANNEL 31
42 #define IEEE1394_ALL_NODES (0xffc0 | 0x003f)
43 #define IEEE1394_MAX_PAYLOAD_S100 512
44 #define FWNET_NO_FIFO_ADDR (~0ULL)
46 #define IANA_SPECIFIER_ID 0x00005eU
47 #define RFC2734_SW_VERSION 0x000001U
49 #define IEEE1394_GASP_HDR_SIZE 8
51 #define RFC2374_UNFRAG_HDR_SIZE 4
52 #define RFC2374_FRAG_HDR_SIZE 8
53 #define RFC2374_FRAG_OVERHEAD 4
55 #define RFC2374_HDR_UNFRAG 0 /* unfragmented */
56 #define RFC2374_HDR_FIRSTFRAG 1 /* first fragment */
57 #define RFC2374_HDR_LASTFRAG 2 /* last fragment */
58 #define RFC2374_HDR_INTFRAG 3 /* interior fragment */
60 #define RFC2734_HW_ADDR_LEN 16
63 __be16 hw_type; /* 0x0018 */
64 __be16 proto_type; /* 0x0806 */
65 u8 hw_addr_len; /* 16 */
66 u8 ip_addr_len; /* 4 */
67 __be16 opcode; /* ARP Opcode */
68 /* Above is exactly the same format as struct arphdr */
70 __be64 s_uniq_id; /* Sender's 64bit EUI */
71 u8 max_rec; /* Sender's max packet size */
72 u8 sspd; /* Sender's max speed */
73 __be16 fifo_hi; /* hi 16bits of sender's FIFO addr */
74 __be32 fifo_lo; /* lo 32bits of sender's FIFO addr */
75 __be32 sip; /* Sender's IP Address */
76 __be32 tip; /* IP Address of requested hw addr */
79 /* This header format is specific to this driver implementation. */
83 u8 h_dest[FWNET_ALEN]; /* destination address */
84 __be16 h_proto; /* packet type ID field */
87 /* IPv4 and IPv6 encapsulation header */
88 struct rfc2734_header {
93 #define fwnet_get_hdr_lf(h) (((h)->w0 & 0xc0000000) >> 30)
94 #define fwnet_get_hdr_ether_type(h) (((h)->w0 & 0x0000ffff))
95 #define fwnet_get_hdr_dg_size(h) (((h)->w0 & 0x0fff0000) >> 16)
96 #define fwnet_get_hdr_fg_off(h) (((h)->w0 & 0x00000fff))
97 #define fwnet_get_hdr_dgl(h) (((h)->w1 & 0xffff0000) >> 16)
99 #define fwnet_set_hdr_lf(lf) ((lf) << 30)
100 #define fwnet_set_hdr_ether_type(et) (et)
101 #define fwnet_set_hdr_dg_size(dgs) ((dgs) << 16)
102 #define fwnet_set_hdr_fg_off(fgo) (fgo)
104 #define fwnet_set_hdr_dgl(dgl) ((dgl) << 16)
106 static inline void fwnet_make_uf_hdr(struct rfc2734_header *hdr,
109 hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_UNFRAG)
110 | fwnet_set_hdr_ether_type(ether_type);
113 static inline void fwnet_make_ff_hdr(struct rfc2734_header *hdr,
114 unsigned ether_type, unsigned dg_size, unsigned dgl)
116 hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_FIRSTFRAG)
117 | fwnet_set_hdr_dg_size(dg_size)
118 | fwnet_set_hdr_ether_type(ether_type);
119 hdr->w1 = fwnet_set_hdr_dgl(dgl);
122 static inline void fwnet_make_sf_hdr(struct rfc2734_header *hdr,
123 unsigned lf, unsigned dg_size, unsigned fg_off, unsigned dgl)
125 hdr->w0 = fwnet_set_hdr_lf(lf)
126 | fwnet_set_hdr_dg_size(dg_size)
127 | fwnet_set_hdr_fg_off(fg_off);
128 hdr->w1 = fwnet_set_hdr_dgl(dgl);
131 /* This list keeps track of what parts of the datagram have been filled in */
132 struct fwnet_fragment_info {
133 struct list_head fi_link;
138 struct fwnet_partial_datagram {
139 struct list_head pd_link;
140 struct list_head fi_list;
142 /* FIXME Why not use skb->data? */
149 static DEFINE_MUTEX(fwnet_device_mutex);
150 static LIST_HEAD(fwnet_device_list);
152 struct fwnet_device {
153 struct list_head dev_link;
156 FWNET_BROADCAST_ERROR,
157 FWNET_BROADCAST_RUNNING,
158 FWNET_BROADCAST_STOPPED,
160 struct fw_iso_context *broadcast_rcv_context;
161 struct fw_iso_buffer broadcast_rcv_buffer;
162 void **broadcast_rcv_buffer_ptrs;
163 unsigned broadcast_rcv_next_ptr;
164 unsigned num_broadcast_rcv_ptrs;
165 unsigned rcv_buffer_size;
167 * This value is the maximum unfragmented datagram size that can be
168 * sent by the hardware. It already has the GASP overhead and the
169 * unfragmented datagram header overhead calculated into it.
171 unsigned broadcast_xmt_max_payload;
172 u16 broadcast_xmt_datagramlabel;
175 * The CSR address that remote nodes must send datagrams to for us to
178 struct fw_address_handler handler;
181 /* Number of tx datagrams that have been queued but not yet acked */
182 int queued_datagrams;
185 struct list_head peer_list;
186 struct fw_card *card;
187 struct net_device *netdev;
191 struct list_head peer_link;
192 struct fwnet_device *dev;
197 /* guarded by dev->lock */
198 struct list_head pd_list; /* received partial datagrams */
199 unsigned pdg_size; /* pd_list size */
201 u16 datagram_label; /* outgoing datagram label */
202 u16 max_payload; /* includes RFC2374_FRAG_HDR_SIZE overhead */
208 /* This is our task struct. It's used for the packet complete callback. */
209 struct fwnet_packet_task {
210 struct fw_transaction transaction;
211 struct rfc2734_header hdr;
213 struct fwnet_device *dev;
215 int outstanding_pkts;
225 * saddr == NULL means use device source address.
226 * daddr == NULL means leave destination address (eg unresolved arp).
228 static int fwnet_header_create(struct sk_buff *skb, struct net_device *net,
229 unsigned short type, const void *daddr,
230 const void *saddr, unsigned len)
232 struct fwnet_header *h;
234 h = (struct fwnet_header *)skb_push(skb, sizeof(*h));
235 put_unaligned_be16(type, &h->h_proto);
237 if (net->flags & (IFF_LOOPBACK | IFF_NOARP)) {
238 memset(h->h_dest, 0, net->addr_len);
240 return net->hard_header_len;
244 memcpy(h->h_dest, daddr, net->addr_len);
246 return net->hard_header_len;
249 return -net->hard_header_len;
252 static int fwnet_header_rebuild(struct sk_buff *skb)
254 struct fwnet_header *h = (struct fwnet_header *)skb->data;
256 if (get_unaligned_be16(&h->h_proto) == ETH_P_IP)
257 return arp_find((unsigned char *)&h->h_dest, skb);
259 dev_notice(&skb->dev->dev, "unable to resolve type %04x addresses\n",
260 be16_to_cpu(h->h_proto));
264 static int fwnet_header_cache(const struct neighbour *neigh,
265 struct hh_cache *hh, __be16 type)
267 struct net_device *net;
268 struct fwnet_header *h;
270 if (type == cpu_to_be16(ETH_P_802_3))
273 h = (struct fwnet_header *)((u8 *)hh->hh_data + HH_DATA_OFF(sizeof(*h)));
275 memcpy(h->h_dest, neigh->ha, net->addr_len);
276 hh->hh_len = FWNET_HLEN;
281 /* Called by Address Resolution module to notify changes in address. */
282 static void fwnet_header_cache_update(struct hh_cache *hh,
283 const struct net_device *net, const unsigned char *haddr)
285 memcpy((u8 *)hh->hh_data + HH_DATA_OFF(FWNET_HLEN), haddr, net->addr_len);
288 static int fwnet_header_parse(const struct sk_buff *skb, unsigned char *haddr)
290 memcpy(haddr, skb->dev->dev_addr, FWNET_ALEN);
295 static const struct header_ops fwnet_header_ops = {
296 .create = fwnet_header_create,
297 .rebuild = fwnet_header_rebuild,
298 .cache = fwnet_header_cache,
299 .cache_update = fwnet_header_cache_update,
300 .parse = fwnet_header_parse,
303 /* FIXME: is this correct for all cases? */
304 static bool fwnet_frag_overlap(struct fwnet_partial_datagram *pd,
305 unsigned offset, unsigned len)
307 struct fwnet_fragment_info *fi;
308 unsigned end = offset + len;
310 list_for_each_entry(fi, &pd->fi_list, fi_link)
311 if (offset < fi->offset + fi->len && end > fi->offset)
317 /* Assumes that new fragment does not overlap any existing fragments */
318 static struct fwnet_fragment_info *fwnet_frag_new(
319 struct fwnet_partial_datagram *pd, unsigned offset, unsigned len)
321 struct fwnet_fragment_info *fi, *fi2, *new;
322 struct list_head *list;
325 list_for_each_entry(fi, &pd->fi_list, fi_link) {
326 if (fi->offset + fi->len == offset) {
327 /* The new fragment can be tacked on to the end */
328 /* Did the new fragment plug a hole? */
329 fi2 = list_entry(fi->fi_link.next,
330 struct fwnet_fragment_info, fi_link);
331 if (fi->offset + fi->len == fi2->offset) {
332 /* glue fragments together */
333 fi->len += len + fi2->len;
334 list_del(&fi2->fi_link);
342 if (offset + len == fi->offset) {
343 /* The new fragment can be tacked on to the beginning */
344 /* Did the new fragment plug a hole? */
345 fi2 = list_entry(fi->fi_link.prev,
346 struct fwnet_fragment_info, fi_link);
347 if (fi2->offset + fi2->len == fi->offset) {
348 /* glue fragments together */
349 fi2->len += fi->len + len;
350 list_del(&fi->fi_link);
360 if (offset > fi->offset + fi->len) {
364 if (offset + len < fi->offset) {
365 list = fi->fi_link.prev;
370 new = kmalloc(sizeof(*new), GFP_ATOMIC);
374 new->offset = offset;
376 list_add(&new->fi_link, list);
381 static struct fwnet_partial_datagram *fwnet_pd_new(struct net_device *net,
382 struct fwnet_peer *peer, u16 datagram_label, unsigned dg_size,
383 void *frag_buf, unsigned frag_off, unsigned frag_len)
385 struct fwnet_partial_datagram *new;
386 struct fwnet_fragment_info *fi;
388 new = kmalloc(sizeof(*new), GFP_ATOMIC);
392 INIT_LIST_HEAD(&new->fi_list);
393 fi = fwnet_frag_new(new, frag_off, frag_len);
397 new->datagram_label = datagram_label;
398 new->datagram_size = dg_size;
399 new->skb = dev_alloc_skb(dg_size + LL_RESERVED_SPACE(net));
400 if (new->skb == NULL)
403 skb_reserve(new->skb, LL_RESERVED_SPACE(net));
404 new->pbuf = skb_put(new->skb, dg_size);
405 memcpy(new->pbuf + frag_off, frag_buf, frag_len);
406 list_add_tail(&new->pd_link, &peer->pd_list);
418 static struct fwnet_partial_datagram *fwnet_pd_find(struct fwnet_peer *peer,
421 struct fwnet_partial_datagram *pd;
423 list_for_each_entry(pd, &peer->pd_list, pd_link)
424 if (pd->datagram_label == datagram_label)
431 static void fwnet_pd_delete(struct fwnet_partial_datagram *old)
433 struct fwnet_fragment_info *fi, *n;
435 list_for_each_entry_safe(fi, n, &old->fi_list, fi_link)
438 list_del(&old->pd_link);
439 dev_kfree_skb_any(old->skb);
443 static bool fwnet_pd_update(struct fwnet_peer *peer,
444 struct fwnet_partial_datagram *pd, void *frag_buf,
445 unsigned frag_off, unsigned frag_len)
447 if (fwnet_frag_new(pd, frag_off, frag_len) == NULL)
450 memcpy(pd->pbuf + frag_off, frag_buf, frag_len);
453 * Move list entry to beginning of list so that oldest partial
454 * datagrams percolate to the end of the list
456 list_move_tail(&pd->pd_link, &peer->pd_list);
461 static bool fwnet_pd_is_complete(struct fwnet_partial_datagram *pd)
463 struct fwnet_fragment_info *fi;
465 fi = list_entry(pd->fi_list.next, struct fwnet_fragment_info, fi_link);
467 return fi->len == pd->datagram_size;
470 /* caller must hold dev->lock */
471 static struct fwnet_peer *fwnet_peer_find_by_guid(struct fwnet_device *dev,
474 struct fwnet_peer *peer;
476 list_for_each_entry(peer, &dev->peer_list, peer_link)
477 if (peer->guid == guid)
483 /* caller must hold dev->lock */
484 static struct fwnet_peer *fwnet_peer_find_by_node_id(struct fwnet_device *dev,
485 int node_id, int generation)
487 struct fwnet_peer *peer;
489 list_for_each_entry(peer, &dev->peer_list, peer_link)
490 if (peer->node_id == node_id &&
491 peer->generation == generation)
497 /* See IEEE 1394-2008 table 6-4, table 8-8, table 16-18. */
498 static unsigned fwnet_max_payload(unsigned max_rec, unsigned speed)
500 max_rec = min(max_rec, speed + 8);
501 max_rec = clamp(max_rec, 8U, 11U); /* 512...4096 */
503 return (1 << (max_rec + 1)) - RFC2374_FRAG_HDR_SIZE;
507 static int fwnet_finish_incoming_packet(struct net_device *net,
508 struct sk_buff *skb, u16 source_node_id,
509 bool is_broadcast, u16 ether_type)
511 struct fwnet_device *dev;
512 static const __be64 broadcast_hw = cpu_to_be64(~0ULL);
516 dev = netdev_priv(net);
517 /* Write metadata, and then pass to the receive level */
519 skb->ip_summed = CHECKSUM_NONE;
522 * Parse the encapsulation header. This actually does the job of
523 * converting to an ethernet frame header, as well as arp
524 * conversion if needed. ARP conversion is easier in this
525 * direction, since we are using ethernet as our backend.
528 * If this is an ARP packet, convert it. First, we want to make
529 * use of some of the fields, since they tell us a little bit
530 * about the sending machine.
532 if (ether_type == ETH_P_ARP) {
533 struct rfc2734_arp *arp1394;
535 unsigned char *arp_ptr;
540 struct fwnet_peer *peer;
543 arp1394 = (struct rfc2734_arp *)skb->data;
544 arp = (struct arphdr *)skb->data;
545 arp_ptr = (unsigned char *)(arp + 1);
546 peer_guid = get_unaligned_be64(&arp1394->s_uniq_id);
547 fifo_addr = (u64)get_unaligned_be16(&arp1394->fifo_hi) << 32
548 | get_unaligned_be32(&arp1394->fifo_lo);
550 sspd = arp1394->sspd;
551 /* Sanity check. OS X 10.3 PPC reportedly sends 131. */
552 if (sspd > SCODE_3200) {
553 dev_notice(&net->dev, "sspd %x out of range\n", sspd);
556 max_payload = fwnet_max_payload(arp1394->max_rec, sspd);
558 spin_lock_irqsave(&dev->lock, flags);
559 peer = fwnet_peer_find_by_guid(dev, peer_guid);
561 peer->fifo = fifo_addr;
563 if (peer->speed > sspd)
565 if (peer->max_payload > max_payload)
566 peer->max_payload = max_payload;
568 peer->ip = arp1394->sip;
570 spin_unlock_irqrestore(&dev->lock, flags);
573 dev_notice(&net->dev,
574 "no peer for ARP packet from %016llx\n",
575 (unsigned long long)peer_guid);
580 * Now that we're done with the 1394 specific stuff, we'll
581 * need to alter some of the data. Believe it or not, all
582 * that needs to be done is sender_IP_address needs to be
583 * moved, the destination hardware address get stuffed
584 * in and the hardware address length set to 8.
586 * IMPORTANT: The code below overwrites 1394 specific data
587 * needed above so keep the munging of the data for the
588 * higher level IP stack last.
592 /* skip over sender unique id */
593 arp_ptr += arp->ar_hln;
594 /* move sender IP addr */
595 put_unaligned(arp1394->sip, (u32 *)arp_ptr);
596 /* skip over sender IP addr */
597 arp_ptr += arp->ar_pln;
599 if (arp->ar_op == htons(ARPOP_REQUEST))
600 memset(arp_ptr, 0, sizeof(u64));
602 memcpy(arp_ptr, net->dev_addr, sizeof(u64));
605 /* Now add the ethernet header. */
606 guid = cpu_to_be64(dev->card->guid);
607 if (dev_hard_header(skb, net, ether_type,
608 is_broadcast ? &broadcast_hw : &guid,
609 NULL, skb->len) >= 0) {
610 struct fwnet_header *eth;
614 skb_reset_mac_header(skb);
615 skb_pull(skb, sizeof(*eth));
616 eth = (struct fwnet_header *)skb_mac_header(skb);
617 if (*eth->h_dest & 1) {
618 if (memcmp(eth->h_dest, net->broadcast,
620 skb->pkt_type = PACKET_BROADCAST;
623 skb->pkt_type = PACKET_MULTICAST;
626 if (memcmp(eth->h_dest, net->dev_addr, net->addr_len))
627 skb->pkt_type = PACKET_OTHERHOST;
629 if (ntohs(eth->h_proto) >= 1536) {
630 protocol = eth->h_proto;
632 rawp = (u16 *)skb->data;
634 protocol = htons(ETH_P_802_3);
636 protocol = htons(ETH_P_802_2);
638 skb->protocol = protocol;
640 status = netif_rx(skb);
641 if (status == NET_RX_DROP) {
642 net->stats.rx_errors++;
643 net->stats.rx_dropped++;
645 net->stats.rx_packets++;
646 net->stats.rx_bytes += skb->len;
652 net->stats.rx_errors++;
653 net->stats.rx_dropped++;
655 dev_kfree_skb_any(skb);
660 static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len,
661 int source_node_id, int generation,
665 struct net_device *net = dev->netdev;
666 struct rfc2734_header hdr;
669 struct fwnet_peer *peer;
670 struct fwnet_partial_datagram *pd;
677 hdr.w0 = be32_to_cpu(buf[0]);
678 lf = fwnet_get_hdr_lf(&hdr);
679 if (lf == RFC2374_HDR_UNFRAG) {
681 * An unfragmented datagram has been received by the ieee1394
682 * bus. Build an skbuff around it so we can pass it to the
683 * high level network layer.
685 ether_type = fwnet_get_hdr_ether_type(&hdr);
687 len -= RFC2374_UNFRAG_HDR_SIZE;
689 skb = dev_alloc_skb(len + LL_RESERVED_SPACE(net));
690 if (unlikely(!skb)) {
691 net->stats.rx_dropped++;
695 skb_reserve(skb, LL_RESERVED_SPACE(net));
696 memcpy(skb_put(skb, len), buf, len);
698 return fwnet_finish_incoming_packet(net, skb, source_node_id,
699 is_broadcast, ether_type);
701 /* A datagram fragment has been received, now the fun begins. */
702 hdr.w1 = ntohl(buf[1]);
704 len -= RFC2374_FRAG_HDR_SIZE;
705 if (lf == RFC2374_HDR_FIRSTFRAG) {
706 ether_type = fwnet_get_hdr_ether_type(&hdr);
710 fg_off = fwnet_get_hdr_fg_off(&hdr);
712 datagram_label = fwnet_get_hdr_dgl(&hdr);
713 dg_size = fwnet_get_hdr_dg_size(&hdr); /* ??? + 1 */
715 spin_lock_irqsave(&dev->lock, flags);
717 peer = fwnet_peer_find_by_node_id(dev, source_node_id, generation);
723 pd = fwnet_pd_find(peer, datagram_label);
725 while (peer->pdg_size >= FWNET_MAX_FRAGMENTS) {
726 /* remove the oldest */
727 fwnet_pd_delete(list_first_entry(&peer->pd_list,
728 struct fwnet_partial_datagram, pd_link));
731 pd = fwnet_pd_new(net, peer, datagram_label,
732 dg_size, buf, fg_off, len);
739 if (fwnet_frag_overlap(pd, fg_off, len) ||
740 pd->datagram_size != dg_size) {
742 * Differing datagram sizes or overlapping fragments,
743 * discard old datagram and start a new one.
746 pd = fwnet_pd_new(net, peer, datagram_label,
747 dg_size, buf, fg_off, len);
754 if (!fwnet_pd_update(peer, pd, buf, fg_off, len)) {
756 * Couldn't save off fragment anyway
757 * so might as well obliterate the
766 } /* new datagram or add to existing one */
768 if (lf == RFC2374_HDR_FIRSTFRAG)
769 pd->ether_type = ether_type;
771 if (fwnet_pd_is_complete(pd)) {
772 ether_type = pd->ether_type;
774 skb = skb_get(pd->skb);
777 spin_unlock_irqrestore(&dev->lock, flags);
779 return fwnet_finish_incoming_packet(net, skb, source_node_id,
783 * Datagram is not complete, we're done for the
788 spin_unlock_irqrestore(&dev->lock, flags);
793 static void fwnet_receive_packet(struct fw_card *card, struct fw_request *r,
794 int tcode, int destination, int source, int generation,
795 unsigned long long offset, void *payload, size_t length,
798 struct fwnet_device *dev = callback_data;
801 if (destination == IEEE1394_ALL_NODES) {
807 if (offset != dev->handler.offset)
808 rcode = RCODE_ADDRESS_ERROR;
809 else if (tcode != TCODE_WRITE_BLOCK_REQUEST)
810 rcode = RCODE_TYPE_ERROR;
811 else if (fwnet_incoming_packet(dev, payload, length,
812 source, generation, false) != 0) {
813 dev_err(&dev->netdev->dev, "incoming packet failure\n");
814 rcode = RCODE_CONFLICT_ERROR;
816 rcode = RCODE_COMPLETE;
818 fw_send_response(card, r, rcode);
821 static void fwnet_receive_broadcast(struct fw_iso_context *context,
822 u32 cycle, size_t header_length, void *header, void *data)
824 struct fwnet_device *dev;
825 struct fw_iso_packet packet;
833 unsigned long offset;
838 length = be16_to_cpup(hdr_ptr);
840 spin_lock_irqsave(&dev->lock, flags);
842 offset = dev->rcv_buffer_size * dev->broadcast_rcv_next_ptr;
843 buf_ptr = dev->broadcast_rcv_buffer_ptrs[dev->broadcast_rcv_next_ptr++];
844 if (dev->broadcast_rcv_next_ptr == dev->num_broadcast_rcv_ptrs)
845 dev->broadcast_rcv_next_ptr = 0;
847 spin_unlock_irqrestore(&dev->lock, flags);
849 specifier_id = (be32_to_cpu(buf_ptr[0]) & 0xffff) << 8
850 | (be32_to_cpu(buf_ptr[1]) & 0xff000000) >> 24;
851 ver = be32_to_cpu(buf_ptr[1]) & 0xffffff;
852 source_node_id = be32_to_cpu(buf_ptr[0]) >> 16;
854 if (specifier_id == IANA_SPECIFIER_ID && ver == RFC2734_SW_VERSION) {
856 length -= IEEE1394_GASP_HDR_SIZE;
857 fwnet_incoming_packet(dev, buf_ptr, length, source_node_id,
858 context->card->generation, true);
861 packet.payload_length = dev->rcv_buffer_size;
862 packet.interrupt = 1;
866 packet.header_length = IEEE1394_GASP_HDR_SIZE;
868 spin_lock_irqsave(&dev->lock, flags);
870 retval = fw_iso_context_queue(dev->broadcast_rcv_context, &packet,
871 &dev->broadcast_rcv_buffer, offset);
873 spin_unlock_irqrestore(&dev->lock, flags);
876 fw_iso_context_queue_flush(dev->broadcast_rcv_context);
878 dev_err(&dev->netdev->dev, "requeue failed\n");
881 static struct kmem_cache *fwnet_packet_task_cache;
883 static void fwnet_free_ptask(struct fwnet_packet_task *ptask)
885 dev_kfree_skb_any(ptask->skb);
886 kmem_cache_free(fwnet_packet_task_cache, ptask);
889 /* Caller must hold dev->lock. */
890 static void dec_queued_datagrams(struct fwnet_device *dev)
892 if (--dev->queued_datagrams == FWNET_MIN_QUEUED_DATAGRAMS)
893 netif_wake_queue(dev->netdev);
896 static int fwnet_send_packet(struct fwnet_packet_task *ptask);
898 static void fwnet_transmit_packet_done(struct fwnet_packet_task *ptask)
900 struct fwnet_device *dev = ptask->dev;
901 struct sk_buff *skb = ptask->skb;
905 spin_lock_irqsave(&dev->lock, flags);
907 ptask->outstanding_pkts--;
909 /* Check whether we or the networking TX soft-IRQ is last user. */
910 free = (ptask->outstanding_pkts == 0 && ptask->enqueued);
912 dec_queued_datagrams(dev);
914 if (ptask->outstanding_pkts == 0) {
915 dev->netdev->stats.tx_packets++;
916 dev->netdev->stats.tx_bytes += skb->len;
919 spin_unlock_irqrestore(&dev->lock, flags);
921 if (ptask->outstanding_pkts > 0) {
927 /* Update the ptask to point to the next fragment and send it */
928 lf = fwnet_get_hdr_lf(&ptask->hdr);
930 case RFC2374_HDR_LASTFRAG:
931 case RFC2374_HDR_UNFRAG:
933 dev_err(&dev->netdev->dev,
934 "outstanding packet %x lf %x, header %x,%x\n",
935 ptask->outstanding_pkts, lf, ptask->hdr.w0,
939 case RFC2374_HDR_FIRSTFRAG:
940 /* Set frag type here for future interior fragments */
941 dg_size = fwnet_get_hdr_dg_size(&ptask->hdr);
942 fg_off = ptask->max_payload - RFC2374_FRAG_HDR_SIZE;
943 datagram_label = fwnet_get_hdr_dgl(&ptask->hdr);
946 case RFC2374_HDR_INTFRAG:
947 dg_size = fwnet_get_hdr_dg_size(&ptask->hdr);
948 fg_off = fwnet_get_hdr_fg_off(&ptask->hdr)
949 + ptask->max_payload - RFC2374_FRAG_HDR_SIZE;
950 datagram_label = fwnet_get_hdr_dgl(&ptask->hdr);
954 if (ptask->dest_node == IEEE1394_ALL_NODES) {
956 ptask->max_payload + IEEE1394_GASP_HDR_SIZE);
958 skb_pull(skb, ptask->max_payload);
960 if (ptask->outstanding_pkts > 1) {
961 fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_INTFRAG,
962 dg_size, fg_off, datagram_label);
964 fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_LASTFRAG,
965 dg_size, fg_off, datagram_label);
966 ptask->max_payload = skb->len + RFC2374_FRAG_HDR_SIZE;
968 fwnet_send_packet(ptask);
972 fwnet_free_ptask(ptask);
975 static void fwnet_transmit_packet_failed(struct fwnet_packet_task *ptask)
977 struct fwnet_device *dev = ptask->dev;
981 spin_lock_irqsave(&dev->lock, flags);
983 /* One fragment failed; don't try to send remaining fragments. */
984 ptask->outstanding_pkts = 0;
986 /* Check whether we or the networking TX soft-IRQ is last user. */
987 free = ptask->enqueued;
989 dec_queued_datagrams(dev);
991 dev->netdev->stats.tx_dropped++;
992 dev->netdev->stats.tx_errors++;
994 spin_unlock_irqrestore(&dev->lock, flags);
997 fwnet_free_ptask(ptask);
1000 static void fwnet_write_complete(struct fw_card *card, int rcode,
1001 void *payload, size_t length, void *data)
1003 struct fwnet_packet_task *ptask = data;
1004 static unsigned long j;
1005 static int last_rcode, errors_skipped;
1007 if (rcode == RCODE_COMPLETE) {
1008 fwnet_transmit_packet_done(ptask);
1010 fwnet_transmit_packet_failed(ptask);
1012 if (printk_timed_ratelimit(&j, 1000) || rcode != last_rcode) {
1013 dev_err(&ptask->dev->netdev->dev,
1014 "fwnet_write_complete failed: %x (skipped %d)\n",
1015 rcode, errors_skipped);
1024 static int fwnet_send_packet(struct fwnet_packet_task *ptask)
1026 struct fwnet_device *dev;
1028 struct rfc2734_header *bufhdr;
1029 unsigned long flags;
1033 tx_len = ptask->max_payload;
1034 switch (fwnet_get_hdr_lf(&ptask->hdr)) {
1035 case RFC2374_HDR_UNFRAG:
1036 bufhdr = (struct rfc2734_header *)
1037 skb_push(ptask->skb, RFC2374_UNFRAG_HDR_SIZE);
1038 put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0);
1041 case RFC2374_HDR_FIRSTFRAG:
1042 case RFC2374_HDR_INTFRAG:
1043 case RFC2374_HDR_LASTFRAG:
1044 bufhdr = (struct rfc2734_header *)
1045 skb_push(ptask->skb, RFC2374_FRAG_HDR_SIZE);
1046 put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0);
1047 put_unaligned_be32(ptask->hdr.w1, &bufhdr->w1);
1053 if (ptask->dest_node == IEEE1394_ALL_NODES) {
1058 /* ptask->generation may not have been set yet */
1059 generation = dev->card->generation;
1061 node_id = dev->card->node_id;
1063 p = skb_push(ptask->skb, IEEE1394_GASP_HDR_SIZE);
1064 put_unaligned_be32(node_id << 16 | IANA_SPECIFIER_ID >> 8, p);
1065 put_unaligned_be32((IANA_SPECIFIER_ID & 0xff) << 24
1066 | RFC2734_SW_VERSION, &p[4]);
1068 /* We should not transmit if broadcast_channel.valid == 0. */
1069 fw_send_request(dev->card, &ptask->transaction,
1071 fw_stream_packet_destination_id(3,
1072 IEEE1394_BROADCAST_CHANNEL, 0),
1073 generation, SCODE_100, 0ULL, ptask->skb->data,
1074 tx_len + 8, fwnet_write_complete, ptask);
1076 spin_lock_irqsave(&dev->lock, flags);
1078 /* If the AT tasklet already ran, we may be last user. */
1079 free = (ptask->outstanding_pkts == 0 && !ptask->enqueued);
1081 ptask->enqueued = true;
1083 dec_queued_datagrams(dev);
1085 spin_unlock_irqrestore(&dev->lock, flags);
1090 fw_send_request(dev->card, &ptask->transaction,
1091 TCODE_WRITE_BLOCK_REQUEST, ptask->dest_node,
1092 ptask->generation, ptask->speed, ptask->fifo_addr,
1093 ptask->skb->data, tx_len, fwnet_write_complete, ptask);
1095 spin_lock_irqsave(&dev->lock, flags);
1097 /* If the AT tasklet already ran, we may be last user. */
1098 free = (ptask->outstanding_pkts == 0 && !ptask->enqueued);
1100 ptask->enqueued = true;
1102 dec_queued_datagrams(dev);
1104 spin_unlock_irqrestore(&dev->lock, flags);
1106 dev->netdev->trans_start = jiffies;
1109 fwnet_free_ptask(ptask);
1114 static int fwnet_broadcast_start(struct fwnet_device *dev)
1116 struct fw_iso_context *context;
1118 unsigned num_packets;
1119 unsigned max_receive;
1120 struct fw_iso_packet packet;
1121 unsigned long offset;
1124 if (dev->local_fifo == FWNET_NO_FIFO_ADDR) {
1125 dev->handler.length = 4096;
1126 dev->handler.address_callback = fwnet_receive_packet;
1127 dev->handler.callback_data = dev;
1129 retval = fw_core_add_address_handler(&dev->handler,
1130 &fw_high_memory_region);
1132 goto failed_initial;
1134 dev->local_fifo = dev->handler.offset;
1137 max_receive = 1U << (dev->card->max_receive + 1);
1138 num_packets = (FWNET_ISO_PAGE_COUNT * PAGE_SIZE) / max_receive;
1140 if (!dev->broadcast_rcv_context) {
1143 context = fw_iso_context_create(dev->card,
1144 FW_ISO_CONTEXT_RECEIVE, IEEE1394_BROADCAST_CHANNEL,
1145 dev->card->link_speed, 8, fwnet_receive_broadcast, dev);
1146 if (IS_ERR(context)) {
1147 retval = PTR_ERR(context);
1148 goto failed_context_create;
1151 retval = fw_iso_buffer_init(&dev->broadcast_rcv_buffer,
1152 dev->card, FWNET_ISO_PAGE_COUNT, DMA_FROM_DEVICE);
1154 goto failed_buffer_init;
1156 ptrptr = kmalloc(sizeof(void *) * num_packets, GFP_KERNEL);
1159 goto failed_ptrs_alloc;
1162 dev->broadcast_rcv_buffer_ptrs = ptrptr;
1163 for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) {
1167 ptr = kmap(dev->broadcast_rcv_buffer.pages[u]);
1168 for (v = 0; v < num_packets / FWNET_ISO_PAGE_COUNT; v++)
1169 *ptrptr++ = (void *)
1170 ((char *)ptr + v * max_receive);
1172 dev->broadcast_rcv_context = context;
1174 context = dev->broadcast_rcv_context;
1177 packet.payload_length = max_receive;
1178 packet.interrupt = 1;
1182 packet.header_length = IEEE1394_GASP_HDR_SIZE;
1185 for (u = 0; u < num_packets; u++) {
1186 retval = fw_iso_context_queue(context, &packet,
1187 &dev->broadcast_rcv_buffer, offset);
1189 goto failed_rcv_queue;
1191 offset += max_receive;
1193 dev->num_broadcast_rcv_ptrs = num_packets;
1194 dev->rcv_buffer_size = max_receive;
1195 dev->broadcast_rcv_next_ptr = 0U;
1196 retval = fw_iso_context_start(context, -1, 0,
1197 FW_ISO_CONTEXT_MATCH_ALL_TAGS); /* ??? sync */
1199 goto failed_rcv_queue;
1201 /* FIXME: adjust it according to the min. speed of all known peers? */
1202 dev->broadcast_xmt_max_payload = IEEE1394_MAX_PAYLOAD_S100
1203 - IEEE1394_GASP_HDR_SIZE - RFC2374_UNFRAG_HDR_SIZE;
1204 dev->broadcast_state = FWNET_BROADCAST_RUNNING;
1209 kfree(dev->broadcast_rcv_buffer_ptrs);
1210 dev->broadcast_rcv_buffer_ptrs = NULL;
1212 fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, dev->card);
1214 fw_iso_context_destroy(context);
1215 dev->broadcast_rcv_context = NULL;
1216 failed_context_create:
1217 fw_core_remove_address_handler(&dev->handler);
1219 dev->local_fifo = FWNET_NO_FIFO_ADDR;
1224 static void set_carrier_state(struct fwnet_device *dev)
1226 if (dev->peer_count > 1)
1227 netif_carrier_on(dev->netdev);
1229 netif_carrier_off(dev->netdev);
1233 static int fwnet_open(struct net_device *net)
1235 struct fwnet_device *dev = netdev_priv(net);
1238 if (dev->broadcast_state == FWNET_BROADCAST_ERROR) {
1239 ret = fwnet_broadcast_start(dev);
1243 netif_start_queue(net);
1245 spin_lock_irq(&dev->lock);
1246 set_carrier_state(dev);
1247 spin_unlock_irq(&dev->lock);
1253 static int fwnet_stop(struct net_device *net)
1255 netif_stop_queue(net);
1257 /* Deallocate iso context for use by other applications? */
1262 static netdev_tx_t fwnet_tx(struct sk_buff *skb, struct net_device *net)
1264 struct fwnet_header hdr_buf;
1265 struct fwnet_device *dev = netdev_priv(net);
1268 unsigned max_payload;
1270 u16 *datagram_label_ptr;
1271 struct fwnet_packet_task *ptask;
1272 struct fwnet_peer *peer;
1273 unsigned long flags;
1275 spin_lock_irqsave(&dev->lock, flags);
1277 /* Can this happen? */
1278 if (netif_queue_stopped(dev->netdev)) {
1279 spin_unlock_irqrestore(&dev->lock, flags);
1281 return NETDEV_TX_BUSY;
1284 ptask = kmem_cache_alloc(fwnet_packet_task_cache, GFP_ATOMIC);
1288 skb = skb_share_check(skb, GFP_ATOMIC);
1293 * Make a copy of the driver-specific header.
1294 * We might need to rebuild the header on tx failure.
1296 memcpy(&hdr_buf, skb->data, sizeof(hdr_buf));
1297 skb_pull(skb, sizeof(hdr_buf));
1299 proto = hdr_buf.h_proto;
1303 * Set the transmission type for the packet. ARP packets and IP
1304 * broadcast packets are sent via GASP.
1306 if (memcmp(hdr_buf.h_dest, net->broadcast, FWNET_ALEN) == 0
1307 || proto == htons(ETH_P_ARP)
1308 || (proto == htons(ETH_P_IP)
1309 && IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) {
1310 max_payload = dev->broadcast_xmt_max_payload;
1311 datagram_label_ptr = &dev->broadcast_xmt_datagramlabel;
1313 ptask->fifo_addr = FWNET_NO_FIFO_ADDR;
1314 ptask->generation = 0;
1315 ptask->dest_node = IEEE1394_ALL_NODES;
1316 ptask->speed = SCODE_100;
1318 __be64 guid = get_unaligned((__be64 *)hdr_buf.h_dest);
1321 peer = fwnet_peer_find_by_guid(dev, be64_to_cpu(guid));
1322 if (!peer || peer->fifo == FWNET_NO_FIFO_ADDR)
1325 generation = peer->generation;
1326 dest_node = peer->node_id;
1327 max_payload = peer->max_payload;
1328 datagram_label_ptr = &peer->datagram_label;
1330 ptask->fifo_addr = peer->fifo;
1331 ptask->generation = generation;
1332 ptask->dest_node = dest_node;
1333 ptask->speed = peer->speed;
1336 /* If this is an ARP packet, convert it */
1337 if (proto == htons(ETH_P_ARP)) {
1338 struct arphdr *arp = (struct arphdr *)skb->data;
1339 unsigned char *arp_ptr = (unsigned char *)(arp + 1);
1340 struct rfc2734_arp *arp1394 = (struct rfc2734_arp *)skb->data;
1343 ipaddr = get_unaligned((__be32 *)(arp_ptr + FWNET_ALEN));
1345 arp1394->hw_addr_len = RFC2734_HW_ADDR_LEN;
1346 arp1394->max_rec = dev->card->max_receive;
1347 arp1394->sspd = dev->card->link_speed;
1349 put_unaligned_be16(dev->local_fifo >> 32,
1351 put_unaligned_be32(dev->local_fifo & 0xffffffff,
1353 put_unaligned(ipaddr, &arp1394->sip);
1361 /* Does it all fit in one packet? */
1362 if (dg_size <= max_payload) {
1363 fwnet_make_uf_hdr(&ptask->hdr, ntohs(proto));
1364 ptask->outstanding_pkts = 1;
1365 max_payload = dg_size + RFC2374_UNFRAG_HDR_SIZE;
1369 max_payload -= RFC2374_FRAG_OVERHEAD;
1370 datagram_label = (*datagram_label_ptr)++;
1371 fwnet_make_ff_hdr(&ptask->hdr, ntohs(proto), dg_size,
1373 ptask->outstanding_pkts = DIV_ROUND_UP(dg_size, max_payload);
1374 max_payload += RFC2374_FRAG_HDR_SIZE;
1377 if (++dev->queued_datagrams == FWNET_MAX_QUEUED_DATAGRAMS)
1378 netif_stop_queue(dev->netdev);
1380 spin_unlock_irqrestore(&dev->lock, flags);
1382 ptask->max_payload = max_payload;
1383 ptask->enqueued = 0;
1385 fwnet_send_packet(ptask);
1387 return NETDEV_TX_OK;
1390 spin_unlock_irqrestore(&dev->lock, flags);
1393 kmem_cache_free(fwnet_packet_task_cache, ptask);
1398 net->stats.tx_dropped++;
1399 net->stats.tx_errors++;
1402 * FIXME: According to a patch from 2003-02-26, "returning non-zero
1403 * causes serious problems" here, allegedly. Before that patch,
1404 * -ERRNO was returned which is not appropriate under Linux 2.6.
1405 * Perhaps more needs to be done? Stop the queue in serious
1406 * conditions and restart it elsewhere?
1408 return NETDEV_TX_OK;
1411 static int fwnet_change_mtu(struct net_device *net, int new_mtu)
1420 static const struct ethtool_ops fwnet_ethtool_ops = {
1421 .get_link = ethtool_op_get_link,
1424 static const struct net_device_ops fwnet_netdev_ops = {
1425 .ndo_open = fwnet_open,
1426 .ndo_stop = fwnet_stop,
1427 .ndo_start_xmit = fwnet_tx,
1428 .ndo_change_mtu = fwnet_change_mtu,
1431 static void fwnet_init_dev(struct net_device *net)
1433 net->header_ops = &fwnet_header_ops;
1434 net->netdev_ops = &fwnet_netdev_ops;
1435 net->watchdog_timeo = 2 * HZ;
1436 net->flags = IFF_BROADCAST | IFF_MULTICAST;
1437 net->features = NETIF_F_HIGHDMA;
1438 net->addr_len = FWNET_ALEN;
1439 net->hard_header_len = FWNET_HLEN;
1440 net->type = ARPHRD_IEEE1394;
1441 net->tx_queue_len = FWNET_TX_QUEUE_LEN;
1442 net->ethtool_ops = &fwnet_ethtool_ops;
1445 /* caller must hold fwnet_device_mutex */
1446 static struct fwnet_device *fwnet_dev_find(struct fw_card *card)
1448 struct fwnet_device *dev;
1450 list_for_each_entry(dev, &fwnet_device_list, dev_link)
1451 if (dev->card == card)
1457 static int fwnet_add_peer(struct fwnet_device *dev,
1458 struct fw_unit *unit, struct fw_device *device)
1460 struct fwnet_peer *peer;
1462 peer = kmalloc(sizeof(*peer), GFP_KERNEL);
1466 dev_set_drvdata(&unit->device, peer);
1469 peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
1470 peer->fifo = FWNET_NO_FIFO_ADDR;
1472 INIT_LIST_HEAD(&peer->pd_list);
1474 peer->datagram_label = 0;
1475 peer->speed = device->max_speed;
1476 peer->max_payload = fwnet_max_payload(device->max_rec, peer->speed);
1478 peer->generation = device->generation;
1480 peer->node_id = device->node_id;
1482 spin_lock_irq(&dev->lock);
1483 list_add_tail(&peer->peer_link, &dev->peer_list);
1485 set_carrier_state(dev);
1486 spin_unlock_irq(&dev->lock);
1491 static int fwnet_probe(struct device *_dev)
1493 struct fw_unit *unit = fw_unit(_dev);
1494 struct fw_device *device = fw_parent_device(unit);
1495 struct fw_card *card = device->card;
1496 struct net_device *net;
1497 bool allocated_netdev = false;
1498 struct fwnet_device *dev;
1502 mutex_lock(&fwnet_device_mutex);
1504 dev = fwnet_dev_find(card);
1510 net = alloc_netdev(sizeof(*dev), "firewire%d", fwnet_init_dev);
1516 allocated_netdev = true;
1517 SET_NETDEV_DEV(net, card->device);
1518 dev = netdev_priv(net);
1520 spin_lock_init(&dev->lock);
1521 dev->broadcast_state = FWNET_BROADCAST_ERROR;
1522 dev->broadcast_rcv_context = NULL;
1523 dev->broadcast_xmt_max_payload = 0;
1524 dev->broadcast_xmt_datagramlabel = 0;
1525 dev->local_fifo = FWNET_NO_FIFO_ADDR;
1526 dev->queued_datagrams = 0;
1527 INIT_LIST_HEAD(&dev->peer_list);
1532 * Use the RFC 2734 default 1500 octets or the maximum payload
1535 max_mtu = (1 << (card->max_receive + 1))
1536 - sizeof(struct rfc2734_header) - IEEE1394_GASP_HDR_SIZE;
1537 net->mtu = min(1500U, max_mtu);
1539 /* Set our hardware address while we're at it */
1540 put_unaligned_be64(card->guid, net->dev_addr);
1541 put_unaligned_be64(~0ULL, net->broadcast);
1542 ret = register_netdev(net);
1546 list_add_tail(&dev->dev_link, &fwnet_device_list);
1547 dev_notice(&net->dev, "IPv4 over IEEE 1394 on card %s\n",
1548 dev_name(card->device));
1550 ret = fwnet_add_peer(dev, unit, device);
1551 if (ret && allocated_netdev) {
1552 unregister_netdev(net);
1553 list_del(&dev->dev_link);
1556 if (ret && allocated_netdev)
1559 mutex_unlock(&fwnet_device_mutex);
1564 static void fwnet_remove_peer(struct fwnet_peer *peer, struct fwnet_device *dev)
1566 struct fwnet_partial_datagram *pd, *pd_next;
1568 spin_lock_irq(&dev->lock);
1569 list_del(&peer->peer_link);
1571 set_carrier_state(dev);
1572 spin_unlock_irq(&dev->lock);
1574 list_for_each_entry_safe(pd, pd_next, &peer->pd_list, pd_link)
1575 fwnet_pd_delete(pd);
1580 static int fwnet_remove(struct device *_dev)
1582 struct fwnet_peer *peer = dev_get_drvdata(_dev);
1583 struct fwnet_device *dev = peer->dev;
1584 struct net_device *net;
1587 mutex_lock(&fwnet_device_mutex);
1590 if (net && peer->ip)
1591 arp_invalidate(net, peer->ip);
1593 fwnet_remove_peer(peer, dev);
1595 if (list_empty(&dev->peer_list)) {
1596 unregister_netdev(net);
1598 if (dev->local_fifo != FWNET_NO_FIFO_ADDR)
1599 fw_core_remove_address_handler(&dev->handler);
1600 if (dev->broadcast_rcv_context) {
1601 fw_iso_context_stop(dev->broadcast_rcv_context);
1602 fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer,
1604 fw_iso_context_destroy(dev->broadcast_rcv_context);
1606 for (i = 0; dev->queued_datagrams && i < 5; i++)
1608 WARN_ON(dev->queued_datagrams);
1609 list_del(&dev->dev_link);
1614 mutex_unlock(&fwnet_device_mutex);
1620 * FIXME abort partially sent fragmented datagrams,
1621 * discard partially received fragmented datagrams
1623 static void fwnet_update(struct fw_unit *unit)
1625 struct fw_device *device = fw_parent_device(unit);
1626 struct fwnet_peer *peer = dev_get_drvdata(&unit->device);
1629 generation = device->generation;
1631 spin_lock_irq(&peer->dev->lock);
1632 peer->node_id = device->node_id;
1633 peer->generation = generation;
1634 spin_unlock_irq(&peer->dev->lock);
1637 static const struct ieee1394_device_id fwnet_id_table[] = {
1639 .match_flags = IEEE1394_MATCH_SPECIFIER_ID |
1640 IEEE1394_MATCH_VERSION,
1641 .specifier_id = IANA_SPECIFIER_ID,
1642 .version = RFC2734_SW_VERSION,
1647 static struct fw_driver fwnet_driver = {
1649 .owner = THIS_MODULE,
1650 .name = KBUILD_MODNAME,
1651 .bus = &fw_bus_type,
1652 .probe = fwnet_probe,
1653 .remove = fwnet_remove,
1655 .update = fwnet_update,
1656 .id_table = fwnet_id_table,
1659 static const u32 rfc2374_unit_directory_data[] = {
1660 0x00040000, /* directory_length */
1661 0x1200005e, /* unit_specifier_id: IANA */
1662 0x81000003, /* textual descriptor offset */
1663 0x13000001, /* unit_sw_version: RFC 2734 */
1664 0x81000005, /* textual descriptor offset */
1665 0x00030000, /* descriptor_length */
1666 0x00000000, /* text */
1667 0x00000000, /* minimal ASCII, en */
1668 0x49414e41, /* I A N A */
1669 0x00030000, /* descriptor_length */
1670 0x00000000, /* text */
1671 0x00000000, /* minimal ASCII, en */
1672 0x49507634, /* I P v 4 */
1675 static struct fw_descriptor rfc2374_unit_directory = {
1676 .length = ARRAY_SIZE(rfc2374_unit_directory_data),
1677 .key = (CSR_DIRECTORY | CSR_UNIT) << 24,
1678 .data = rfc2374_unit_directory_data
1681 static int __init fwnet_init(void)
1685 err = fw_core_add_descriptor(&rfc2374_unit_directory);
1689 fwnet_packet_task_cache = kmem_cache_create("packet_task",
1690 sizeof(struct fwnet_packet_task), 0, 0, NULL);
1691 if (!fwnet_packet_task_cache) {
1696 err = driver_register(&fwnet_driver.driver);
1700 kmem_cache_destroy(fwnet_packet_task_cache);
1702 fw_core_remove_descriptor(&rfc2374_unit_directory);
1706 module_init(fwnet_init);
1708 static void __exit fwnet_cleanup(void)
1710 driver_unregister(&fwnet_driver.driver);
1711 kmem_cache_destroy(fwnet_packet_task_cache);
1712 fw_core_remove_descriptor(&rfc2374_unit_directory);
1714 module_exit(fwnet_cleanup);
1716 MODULE_AUTHOR("Jay Fenlason <fenlason@redhat.com>");
1717 MODULE_DESCRIPTION("IPv4 over IEEE1394 as per RFC 2734");
1718 MODULE_LICENSE("GPL");
1719 MODULE_DEVICE_TABLE(ieee1394, fwnet_id_table);