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 fw_notify("%s: unable to resolve type %04x addresses\n",
260 skb->dev->name, 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 + 16 - 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 + 16 - 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);
372 fw_error("out of memory\n");
376 new->offset = offset;
378 list_add(&new->fi_link, list);
383 static struct fwnet_partial_datagram *fwnet_pd_new(struct net_device *net,
384 struct fwnet_peer *peer, u16 datagram_label, unsigned dg_size,
385 void *frag_buf, unsigned frag_off, unsigned frag_len)
387 struct fwnet_partial_datagram *new;
388 struct fwnet_fragment_info *fi;
390 new = kmalloc(sizeof(*new), GFP_ATOMIC);
394 INIT_LIST_HEAD(&new->fi_list);
395 fi = fwnet_frag_new(new, frag_off, frag_len);
399 new->datagram_label = datagram_label;
400 new->datagram_size = dg_size;
401 new->skb = dev_alloc_skb(dg_size + net->hard_header_len + 15);
402 if (new->skb == NULL)
405 skb_reserve(new->skb, (net->hard_header_len + 15) & ~15);
406 new->pbuf = skb_put(new->skb, dg_size);
407 memcpy(new->pbuf + frag_off, frag_buf, frag_len);
408 list_add_tail(&new->pd_link, &peer->pd_list);
417 fw_error("out of memory\n");
422 static struct fwnet_partial_datagram *fwnet_pd_find(struct fwnet_peer *peer,
425 struct fwnet_partial_datagram *pd;
427 list_for_each_entry(pd, &peer->pd_list, pd_link)
428 if (pd->datagram_label == datagram_label)
435 static void fwnet_pd_delete(struct fwnet_partial_datagram *old)
437 struct fwnet_fragment_info *fi, *n;
439 list_for_each_entry_safe(fi, n, &old->fi_list, fi_link)
442 list_del(&old->pd_link);
443 dev_kfree_skb_any(old->skb);
447 static bool fwnet_pd_update(struct fwnet_peer *peer,
448 struct fwnet_partial_datagram *pd, void *frag_buf,
449 unsigned frag_off, unsigned frag_len)
451 if (fwnet_frag_new(pd, frag_off, frag_len) == NULL)
454 memcpy(pd->pbuf + frag_off, frag_buf, frag_len);
457 * Move list entry to beginning of list so that oldest partial
458 * datagrams percolate to the end of the list
460 list_move_tail(&pd->pd_link, &peer->pd_list);
465 static bool fwnet_pd_is_complete(struct fwnet_partial_datagram *pd)
467 struct fwnet_fragment_info *fi;
469 fi = list_entry(pd->fi_list.next, struct fwnet_fragment_info, fi_link);
471 return fi->len == pd->datagram_size;
474 /* caller must hold dev->lock */
475 static struct fwnet_peer *fwnet_peer_find_by_guid(struct fwnet_device *dev,
478 struct fwnet_peer *peer;
480 list_for_each_entry(peer, &dev->peer_list, peer_link)
481 if (peer->guid == guid)
487 /* caller must hold dev->lock */
488 static struct fwnet_peer *fwnet_peer_find_by_node_id(struct fwnet_device *dev,
489 int node_id, int generation)
491 struct fwnet_peer *peer;
493 list_for_each_entry(peer, &dev->peer_list, peer_link)
494 if (peer->node_id == node_id &&
495 peer->generation == generation)
501 /* See IEEE 1394-2008 table 6-4, table 8-8, table 16-18. */
502 static unsigned fwnet_max_payload(unsigned max_rec, unsigned speed)
504 max_rec = min(max_rec, speed + 8);
505 max_rec = clamp(max_rec, 8U, 11U); /* 512...4096 */
507 return (1 << (max_rec + 1)) - RFC2374_FRAG_HDR_SIZE;
511 static int fwnet_finish_incoming_packet(struct net_device *net,
512 struct sk_buff *skb, u16 source_node_id,
513 bool is_broadcast, u16 ether_type)
515 struct fwnet_device *dev;
516 static const __be64 broadcast_hw = cpu_to_be64(~0ULL);
520 dev = netdev_priv(net);
521 /* Write metadata, and then pass to the receive level */
523 skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */
526 * Parse the encapsulation header. This actually does the job of
527 * converting to an ethernet frame header, as well as arp
528 * conversion if needed. ARP conversion is easier in this
529 * direction, since we are using ethernet as our backend.
532 * If this is an ARP packet, convert it. First, we want to make
533 * use of some of the fields, since they tell us a little bit
534 * about the sending machine.
536 if (ether_type == ETH_P_ARP) {
537 struct rfc2734_arp *arp1394;
539 unsigned char *arp_ptr;
544 struct fwnet_peer *peer;
547 arp1394 = (struct rfc2734_arp *)skb->data;
548 arp = (struct arphdr *)skb->data;
549 arp_ptr = (unsigned char *)(arp + 1);
550 peer_guid = get_unaligned_be64(&arp1394->s_uniq_id);
551 fifo_addr = (u64)get_unaligned_be16(&arp1394->fifo_hi) << 32
552 | get_unaligned_be32(&arp1394->fifo_lo);
554 sspd = arp1394->sspd;
555 /* Sanity check. OS X 10.3 PPC reportedly sends 131. */
556 if (sspd > SCODE_3200) {
557 fw_notify("sspd %x out of range\n", sspd);
560 max_payload = fwnet_max_payload(arp1394->max_rec, sspd);
562 spin_lock_irqsave(&dev->lock, flags);
563 peer = fwnet_peer_find_by_guid(dev, peer_guid);
565 peer->fifo = fifo_addr;
567 if (peer->speed > sspd)
569 if (peer->max_payload > max_payload)
570 peer->max_payload = max_payload;
572 peer->ip = arp1394->sip;
574 spin_unlock_irqrestore(&dev->lock, flags);
577 fw_notify("No peer for ARP packet from %016llx\n",
578 (unsigned long long)peer_guid);
583 * Now that we're done with the 1394 specific stuff, we'll
584 * need to alter some of the data. Believe it or not, all
585 * that needs to be done is sender_IP_address needs to be
586 * moved, the destination hardware address get stuffed
587 * in and the hardware address length set to 8.
589 * IMPORTANT: The code below overwrites 1394 specific data
590 * needed above so keep the munging of the data for the
591 * higher level IP stack last.
595 /* skip over sender unique id */
596 arp_ptr += arp->ar_hln;
597 /* move sender IP addr */
598 put_unaligned(arp1394->sip, (u32 *)arp_ptr);
599 /* skip over sender IP addr */
600 arp_ptr += arp->ar_pln;
602 if (arp->ar_op == htons(ARPOP_REQUEST))
603 memset(arp_ptr, 0, sizeof(u64));
605 memcpy(arp_ptr, net->dev_addr, sizeof(u64));
608 /* Now add the ethernet header. */
609 guid = cpu_to_be64(dev->card->guid);
610 if (dev_hard_header(skb, net, ether_type,
611 is_broadcast ? &broadcast_hw : &guid,
612 NULL, skb->len) >= 0) {
613 struct fwnet_header *eth;
617 skb_reset_mac_header(skb);
618 skb_pull(skb, sizeof(*eth));
619 eth = (struct fwnet_header *)skb_mac_header(skb);
620 if (*eth->h_dest & 1) {
621 if (memcmp(eth->h_dest, net->broadcast,
623 skb->pkt_type = PACKET_BROADCAST;
626 skb->pkt_type = PACKET_MULTICAST;
629 if (memcmp(eth->h_dest, net->dev_addr, net->addr_len))
630 skb->pkt_type = PACKET_OTHERHOST;
632 if (ntohs(eth->h_proto) >= 1536) {
633 protocol = eth->h_proto;
635 rawp = (u16 *)skb->data;
637 protocol = htons(ETH_P_802_3);
639 protocol = htons(ETH_P_802_2);
641 skb->protocol = protocol;
643 status = netif_rx(skb);
644 if (status == NET_RX_DROP) {
645 net->stats.rx_errors++;
646 net->stats.rx_dropped++;
648 net->stats.rx_packets++;
649 net->stats.rx_bytes += skb->len;
655 net->stats.rx_errors++;
656 net->stats.rx_dropped++;
658 dev_kfree_skb_any(skb);
663 static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len,
664 int source_node_id, int generation,
668 struct net_device *net = dev->netdev;
669 struct rfc2734_header hdr;
672 struct fwnet_peer *peer;
673 struct fwnet_partial_datagram *pd;
680 if (len <= RFC2374_UNFRAG_HDR_SIZE)
683 hdr.w0 = be32_to_cpu(buf[0]);
684 lf = fwnet_get_hdr_lf(&hdr);
685 if (lf == RFC2374_HDR_UNFRAG) {
687 * An unfragmented datagram has been received by the ieee1394
688 * bus. Build an skbuff around it so we can pass it to the
689 * high level network layer.
691 ether_type = fwnet_get_hdr_ether_type(&hdr);
693 len -= RFC2374_UNFRAG_HDR_SIZE;
695 skb = dev_alloc_skb(len + net->hard_header_len + 15);
696 if (unlikely(!skb)) {
697 fw_error("out of memory\n");
698 net->stats.rx_dropped++;
702 skb_reserve(skb, (net->hard_header_len + 15) & ~15);
703 memcpy(skb_put(skb, len), buf, len);
705 return fwnet_finish_incoming_packet(net, skb, source_node_id,
706 is_broadcast, ether_type);
709 /* A datagram fragment has been received, now the fun begins. */
711 if (len <= RFC2374_FRAG_HDR_SIZE)
714 hdr.w1 = ntohl(buf[1]);
716 len -= RFC2374_FRAG_HDR_SIZE;
717 if (lf == RFC2374_HDR_FIRSTFRAG) {
718 ether_type = fwnet_get_hdr_ether_type(&hdr);
722 fg_off = fwnet_get_hdr_fg_off(&hdr);
724 datagram_label = fwnet_get_hdr_dgl(&hdr);
725 dg_size = fwnet_get_hdr_dg_size(&hdr); /* ??? + 1 */
727 if (fg_off + len > dg_size)
730 spin_lock_irqsave(&dev->lock, flags);
732 peer = fwnet_peer_find_by_node_id(dev, source_node_id, generation);
738 pd = fwnet_pd_find(peer, datagram_label);
740 while (peer->pdg_size >= FWNET_MAX_FRAGMENTS) {
741 /* remove the oldest */
742 fwnet_pd_delete(list_first_entry(&peer->pd_list,
743 struct fwnet_partial_datagram, pd_link));
746 pd = fwnet_pd_new(net, peer, datagram_label,
747 dg_size, buf, fg_off, len);
754 if (fwnet_frag_overlap(pd, fg_off, len) ||
755 pd->datagram_size != dg_size) {
757 * Differing datagram sizes or overlapping fragments,
758 * discard old datagram and start a new one.
761 pd = fwnet_pd_new(net, peer, datagram_label,
762 dg_size, buf, fg_off, len);
769 if (!fwnet_pd_update(peer, pd, buf, fg_off, len)) {
771 * Couldn't save off fragment anyway
772 * so might as well obliterate the
781 } /* new datagram or add to existing one */
783 if (lf == RFC2374_HDR_FIRSTFRAG)
784 pd->ether_type = ether_type;
786 if (fwnet_pd_is_complete(pd)) {
787 ether_type = pd->ether_type;
789 skb = skb_get(pd->skb);
792 spin_unlock_irqrestore(&dev->lock, flags);
794 return fwnet_finish_incoming_packet(net, skb, source_node_id,
798 * Datagram is not complete, we're done for the
803 spin_unlock_irqrestore(&dev->lock, flags);
808 static void fwnet_receive_packet(struct fw_card *card, struct fw_request *r,
809 int tcode, int destination, int source, int generation,
810 unsigned long long offset, void *payload, size_t length,
813 struct fwnet_device *dev = callback_data;
816 if (destination == IEEE1394_ALL_NODES) {
822 if (offset != dev->handler.offset)
823 rcode = RCODE_ADDRESS_ERROR;
824 else if (tcode != TCODE_WRITE_BLOCK_REQUEST)
825 rcode = RCODE_TYPE_ERROR;
826 else if (fwnet_incoming_packet(dev, payload, length,
827 source, generation, false) != 0) {
828 fw_error("Incoming packet failure\n");
829 rcode = RCODE_CONFLICT_ERROR;
831 rcode = RCODE_COMPLETE;
833 fw_send_response(card, r, rcode);
836 static int gasp_source_id(__be32 *p)
838 return be32_to_cpu(p[0]) >> 16;
841 static u32 gasp_specifier_id(__be32 *p)
843 return (be32_to_cpu(p[0]) & 0xffff) << 8 |
844 (be32_to_cpu(p[1]) & 0xff000000) >> 24;
847 static u32 gasp_version(__be32 *p)
849 return be32_to_cpu(p[1]) & 0xffffff;
852 static void fwnet_receive_broadcast(struct fw_iso_context *context,
853 u32 cycle, size_t header_length, void *header, void *data)
855 struct fwnet_device *dev;
856 struct fw_iso_packet packet;
857 struct fw_card *card;
862 unsigned long offset;
868 length = be16_to_cpup(hdr_ptr);
870 spin_lock_irqsave(&dev->lock, flags);
872 offset = dev->rcv_buffer_size * dev->broadcast_rcv_next_ptr;
873 buf_ptr = dev->broadcast_rcv_buffer_ptrs[dev->broadcast_rcv_next_ptr++];
874 if (dev->broadcast_rcv_next_ptr == dev->num_broadcast_rcv_ptrs)
875 dev->broadcast_rcv_next_ptr = 0;
877 spin_unlock_irqrestore(&dev->lock, flags);
879 if (length > IEEE1394_GASP_HDR_SIZE &&
880 gasp_specifier_id(buf_ptr) == IANA_SPECIFIER_ID &&
881 gasp_version(buf_ptr) == RFC2734_SW_VERSION)
882 fwnet_incoming_packet(dev, buf_ptr + 2,
883 length - IEEE1394_GASP_HDR_SIZE,
884 gasp_source_id(buf_ptr),
885 context->card->generation, true);
887 packet.payload_length = dev->rcv_buffer_size;
888 packet.interrupt = 1;
892 packet.header_length = IEEE1394_GASP_HDR_SIZE;
894 spin_lock_irqsave(&dev->lock, flags);
896 retval = fw_iso_context_queue(dev->broadcast_rcv_context, &packet,
897 &dev->broadcast_rcv_buffer, offset);
899 spin_unlock_irqrestore(&dev->lock, flags);
902 fw_iso_context_queue_flush(dev->broadcast_rcv_context);
904 fw_error("requeue failed\n");
907 static struct kmem_cache *fwnet_packet_task_cache;
909 static void fwnet_free_ptask(struct fwnet_packet_task *ptask)
911 dev_kfree_skb_any(ptask->skb);
912 kmem_cache_free(fwnet_packet_task_cache, ptask);
915 /* Caller must hold dev->lock. */
916 static void dec_queued_datagrams(struct fwnet_device *dev)
918 if (--dev->queued_datagrams == FWNET_MIN_QUEUED_DATAGRAMS)
919 netif_wake_queue(dev->netdev);
922 static int fwnet_send_packet(struct fwnet_packet_task *ptask);
924 static void fwnet_transmit_packet_done(struct fwnet_packet_task *ptask)
926 struct fwnet_device *dev = ptask->dev;
927 struct sk_buff *skb = ptask->skb;
931 spin_lock_irqsave(&dev->lock, flags);
933 ptask->outstanding_pkts--;
935 /* Check whether we or the networking TX soft-IRQ is last user. */
936 free = (ptask->outstanding_pkts == 0 && ptask->enqueued);
938 dec_queued_datagrams(dev);
940 if (ptask->outstanding_pkts == 0) {
941 dev->netdev->stats.tx_packets++;
942 dev->netdev->stats.tx_bytes += skb->len;
945 spin_unlock_irqrestore(&dev->lock, flags);
947 if (ptask->outstanding_pkts > 0) {
953 /* Update the ptask to point to the next fragment and send it */
954 lf = fwnet_get_hdr_lf(&ptask->hdr);
956 case RFC2374_HDR_LASTFRAG:
957 case RFC2374_HDR_UNFRAG:
959 fw_error("Outstanding packet %x lf %x, header %x,%x\n",
960 ptask->outstanding_pkts, lf, ptask->hdr.w0,
964 case RFC2374_HDR_FIRSTFRAG:
965 /* Set frag type here for future interior fragments */
966 dg_size = fwnet_get_hdr_dg_size(&ptask->hdr);
967 fg_off = ptask->max_payload - RFC2374_FRAG_HDR_SIZE;
968 datagram_label = fwnet_get_hdr_dgl(&ptask->hdr);
971 case RFC2374_HDR_INTFRAG:
972 dg_size = fwnet_get_hdr_dg_size(&ptask->hdr);
973 fg_off = fwnet_get_hdr_fg_off(&ptask->hdr)
974 + ptask->max_payload - RFC2374_FRAG_HDR_SIZE;
975 datagram_label = fwnet_get_hdr_dgl(&ptask->hdr);
979 if (ptask->dest_node == IEEE1394_ALL_NODES) {
981 ptask->max_payload + IEEE1394_GASP_HDR_SIZE);
983 skb_pull(skb, ptask->max_payload);
985 if (ptask->outstanding_pkts > 1) {
986 fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_INTFRAG,
987 dg_size, fg_off, datagram_label);
989 fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_LASTFRAG,
990 dg_size, fg_off, datagram_label);
991 ptask->max_payload = skb->len + RFC2374_FRAG_HDR_SIZE;
993 fwnet_send_packet(ptask);
997 fwnet_free_ptask(ptask);
1000 static void fwnet_transmit_packet_failed(struct fwnet_packet_task *ptask)
1002 struct fwnet_device *dev = ptask->dev;
1003 unsigned long flags;
1006 spin_lock_irqsave(&dev->lock, flags);
1008 /* One fragment failed; don't try to send remaining fragments. */
1009 ptask->outstanding_pkts = 0;
1011 /* Check whether we or the networking TX soft-IRQ is last user. */
1012 free = ptask->enqueued;
1014 dec_queued_datagrams(dev);
1016 dev->netdev->stats.tx_dropped++;
1017 dev->netdev->stats.tx_errors++;
1019 spin_unlock_irqrestore(&dev->lock, flags);
1022 fwnet_free_ptask(ptask);
1025 static void fwnet_write_complete(struct fw_card *card, int rcode,
1026 void *payload, size_t length, void *data)
1028 struct fwnet_packet_task *ptask = data;
1029 static unsigned long j;
1030 static int last_rcode, errors_skipped;
1032 if (rcode == RCODE_COMPLETE) {
1033 fwnet_transmit_packet_done(ptask);
1035 fwnet_transmit_packet_failed(ptask);
1037 if (printk_timed_ratelimit(&j, 1000) || rcode != last_rcode) {
1038 fw_error("fwnet_write_complete: "
1039 "failed: %x (skipped %d)\n", rcode, errors_skipped);
1048 static int fwnet_send_packet(struct fwnet_packet_task *ptask)
1050 struct fwnet_device *dev;
1052 struct rfc2734_header *bufhdr;
1053 unsigned long flags;
1057 tx_len = ptask->max_payload;
1058 switch (fwnet_get_hdr_lf(&ptask->hdr)) {
1059 case RFC2374_HDR_UNFRAG:
1060 bufhdr = (struct rfc2734_header *)
1061 skb_push(ptask->skb, RFC2374_UNFRAG_HDR_SIZE);
1062 put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0);
1065 case RFC2374_HDR_FIRSTFRAG:
1066 case RFC2374_HDR_INTFRAG:
1067 case RFC2374_HDR_LASTFRAG:
1068 bufhdr = (struct rfc2734_header *)
1069 skb_push(ptask->skb, RFC2374_FRAG_HDR_SIZE);
1070 put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0);
1071 put_unaligned_be32(ptask->hdr.w1, &bufhdr->w1);
1077 if (ptask->dest_node == IEEE1394_ALL_NODES) {
1082 /* ptask->generation may not have been set yet */
1083 generation = dev->card->generation;
1085 node_id = dev->card->node_id;
1087 p = skb_push(ptask->skb, IEEE1394_GASP_HDR_SIZE);
1088 put_unaligned_be32(node_id << 16 | IANA_SPECIFIER_ID >> 8, p);
1089 put_unaligned_be32((IANA_SPECIFIER_ID & 0xff) << 24
1090 | RFC2734_SW_VERSION, &p[4]);
1092 /* We should not transmit if broadcast_channel.valid == 0. */
1093 fw_send_request(dev->card, &ptask->transaction,
1095 fw_stream_packet_destination_id(3,
1096 IEEE1394_BROADCAST_CHANNEL, 0),
1097 generation, SCODE_100, 0ULL, ptask->skb->data,
1098 tx_len + 8, fwnet_write_complete, ptask);
1100 spin_lock_irqsave(&dev->lock, flags);
1102 /* If the AT tasklet already ran, we may be last user. */
1103 free = (ptask->outstanding_pkts == 0 && !ptask->enqueued);
1105 ptask->enqueued = true;
1107 dec_queued_datagrams(dev);
1109 spin_unlock_irqrestore(&dev->lock, flags);
1114 fw_send_request(dev->card, &ptask->transaction,
1115 TCODE_WRITE_BLOCK_REQUEST, ptask->dest_node,
1116 ptask->generation, ptask->speed, ptask->fifo_addr,
1117 ptask->skb->data, tx_len, fwnet_write_complete, ptask);
1119 spin_lock_irqsave(&dev->lock, flags);
1121 /* If the AT tasklet already ran, we may be last user. */
1122 free = (ptask->outstanding_pkts == 0 && !ptask->enqueued);
1124 ptask->enqueued = true;
1126 dec_queued_datagrams(dev);
1128 spin_unlock_irqrestore(&dev->lock, flags);
1130 dev->netdev->trans_start = jiffies;
1133 fwnet_free_ptask(ptask);
1138 static int fwnet_broadcast_start(struct fwnet_device *dev)
1140 struct fw_iso_context *context;
1142 unsigned num_packets;
1143 unsigned max_receive;
1144 struct fw_iso_packet packet;
1145 unsigned long offset;
1148 if (dev->local_fifo == FWNET_NO_FIFO_ADDR) {
1149 dev->handler.length = 4096;
1150 dev->handler.address_callback = fwnet_receive_packet;
1151 dev->handler.callback_data = dev;
1153 retval = fw_core_add_address_handler(&dev->handler,
1154 &fw_high_memory_region);
1156 goto failed_initial;
1158 dev->local_fifo = dev->handler.offset;
1161 max_receive = 1U << (dev->card->max_receive + 1);
1162 num_packets = (FWNET_ISO_PAGE_COUNT * PAGE_SIZE) / max_receive;
1164 if (!dev->broadcast_rcv_context) {
1167 context = fw_iso_context_create(dev->card,
1168 FW_ISO_CONTEXT_RECEIVE, IEEE1394_BROADCAST_CHANNEL,
1169 dev->card->link_speed, 8, fwnet_receive_broadcast, dev);
1170 if (IS_ERR(context)) {
1171 retval = PTR_ERR(context);
1172 goto failed_context_create;
1175 retval = fw_iso_buffer_init(&dev->broadcast_rcv_buffer,
1176 dev->card, FWNET_ISO_PAGE_COUNT, DMA_FROM_DEVICE);
1178 goto failed_buffer_init;
1180 ptrptr = kmalloc(sizeof(void *) * num_packets, GFP_KERNEL);
1183 goto failed_ptrs_alloc;
1186 dev->broadcast_rcv_buffer_ptrs = ptrptr;
1187 for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) {
1191 ptr = kmap(dev->broadcast_rcv_buffer.pages[u]);
1192 for (v = 0; v < num_packets / FWNET_ISO_PAGE_COUNT; v++)
1193 *ptrptr++ = (void *)
1194 ((char *)ptr + v * max_receive);
1196 dev->broadcast_rcv_context = context;
1198 context = dev->broadcast_rcv_context;
1201 packet.payload_length = max_receive;
1202 packet.interrupt = 1;
1206 packet.header_length = IEEE1394_GASP_HDR_SIZE;
1209 for (u = 0; u < num_packets; u++) {
1210 retval = fw_iso_context_queue(context, &packet,
1211 &dev->broadcast_rcv_buffer, offset);
1213 goto failed_rcv_queue;
1215 offset += max_receive;
1217 dev->num_broadcast_rcv_ptrs = num_packets;
1218 dev->rcv_buffer_size = max_receive;
1219 dev->broadcast_rcv_next_ptr = 0U;
1220 retval = fw_iso_context_start(context, -1, 0,
1221 FW_ISO_CONTEXT_MATCH_ALL_TAGS); /* ??? sync */
1223 goto failed_rcv_queue;
1225 /* FIXME: adjust it according to the min. speed of all known peers? */
1226 dev->broadcast_xmt_max_payload = IEEE1394_MAX_PAYLOAD_S100
1227 - IEEE1394_GASP_HDR_SIZE - RFC2374_UNFRAG_HDR_SIZE;
1228 dev->broadcast_state = FWNET_BROADCAST_RUNNING;
1233 kfree(dev->broadcast_rcv_buffer_ptrs);
1234 dev->broadcast_rcv_buffer_ptrs = NULL;
1236 fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, dev->card);
1238 fw_iso_context_destroy(context);
1239 dev->broadcast_rcv_context = NULL;
1240 failed_context_create:
1241 fw_core_remove_address_handler(&dev->handler);
1243 dev->local_fifo = FWNET_NO_FIFO_ADDR;
1248 static void set_carrier_state(struct fwnet_device *dev)
1250 if (dev->peer_count > 1)
1251 netif_carrier_on(dev->netdev);
1253 netif_carrier_off(dev->netdev);
1257 static int fwnet_open(struct net_device *net)
1259 struct fwnet_device *dev = netdev_priv(net);
1262 if (dev->broadcast_state == FWNET_BROADCAST_ERROR) {
1263 ret = fwnet_broadcast_start(dev);
1267 netif_start_queue(net);
1269 spin_lock_irq(&dev->lock);
1270 set_carrier_state(dev);
1271 spin_unlock_irq(&dev->lock);
1277 static int fwnet_stop(struct net_device *net)
1279 netif_stop_queue(net);
1281 /* Deallocate iso context for use by other applications? */
1286 static netdev_tx_t fwnet_tx(struct sk_buff *skb, struct net_device *net)
1288 struct fwnet_header hdr_buf;
1289 struct fwnet_device *dev = netdev_priv(net);
1292 unsigned max_payload;
1294 u16 *datagram_label_ptr;
1295 struct fwnet_packet_task *ptask;
1296 struct fwnet_peer *peer;
1297 unsigned long flags;
1299 spin_lock_irqsave(&dev->lock, flags);
1301 /* Can this happen? */
1302 if (netif_queue_stopped(dev->netdev)) {
1303 spin_unlock_irqrestore(&dev->lock, flags);
1305 return NETDEV_TX_BUSY;
1308 ptask = kmem_cache_alloc(fwnet_packet_task_cache, GFP_ATOMIC);
1312 skb = skb_share_check(skb, GFP_ATOMIC);
1317 * Make a copy of the driver-specific header.
1318 * We might need to rebuild the header on tx failure.
1320 memcpy(&hdr_buf, skb->data, sizeof(hdr_buf));
1321 skb_pull(skb, sizeof(hdr_buf));
1323 proto = hdr_buf.h_proto;
1327 * Set the transmission type for the packet. ARP packets and IP
1328 * broadcast packets are sent via GASP.
1330 if (memcmp(hdr_buf.h_dest, net->broadcast, FWNET_ALEN) == 0
1331 || proto == htons(ETH_P_ARP)
1332 || (proto == htons(ETH_P_IP)
1333 && IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) {
1334 max_payload = dev->broadcast_xmt_max_payload;
1335 datagram_label_ptr = &dev->broadcast_xmt_datagramlabel;
1337 ptask->fifo_addr = FWNET_NO_FIFO_ADDR;
1338 ptask->generation = 0;
1339 ptask->dest_node = IEEE1394_ALL_NODES;
1340 ptask->speed = SCODE_100;
1342 __be64 guid = get_unaligned((__be64 *)hdr_buf.h_dest);
1345 peer = fwnet_peer_find_by_guid(dev, be64_to_cpu(guid));
1346 if (!peer || peer->fifo == FWNET_NO_FIFO_ADDR)
1349 generation = peer->generation;
1350 dest_node = peer->node_id;
1351 max_payload = peer->max_payload;
1352 datagram_label_ptr = &peer->datagram_label;
1354 ptask->fifo_addr = peer->fifo;
1355 ptask->generation = generation;
1356 ptask->dest_node = dest_node;
1357 ptask->speed = peer->speed;
1360 /* If this is an ARP packet, convert it */
1361 if (proto == htons(ETH_P_ARP)) {
1362 struct arphdr *arp = (struct arphdr *)skb->data;
1363 unsigned char *arp_ptr = (unsigned char *)(arp + 1);
1364 struct rfc2734_arp *arp1394 = (struct rfc2734_arp *)skb->data;
1367 ipaddr = get_unaligned((__be32 *)(arp_ptr + FWNET_ALEN));
1369 arp1394->hw_addr_len = RFC2734_HW_ADDR_LEN;
1370 arp1394->max_rec = dev->card->max_receive;
1371 arp1394->sspd = dev->card->link_speed;
1373 put_unaligned_be16(dev->local_fifo >> 32,
1375 put_unaligned_be32(dev->local_fifo & 0xffffffff,
1377 put_unaligned(ipaddr, &arp1394->sip);
1385 /* Does it all fit in one packet? */
1386 if (dg_size <= max_payload) {
1387 fwnet_make_uf_hdr(&ptask->hdr, ntohs(proto));
1388 ptask->outstanding_pkts = 1;
1389 max_payload = dg_size + RFC2374_UNFRAG_HDR_SIZE;
1393 max_payload -= RFC2374_FRAG_OVERHEAD;
1394 datagram_label = (*datagram_label_ptr)++;
1395 fwnet_make_ff_hdr(&ptask->hdr, ntohs(proto), dg_size,
1397 ptask->outstanding_pkts = DIV_ROUND_UP(dg_size, max_payload);
1398 max_payload += RFC2374_FRAG_HDR_SIZE;
1401 if (++dev->queued_datagrams == FWNET_MAX_QUEUED_DATAGRAMS)
1402 netif_stop_queue(dev->netdev);
1404 spin_unlock_irqrestore(&dev->lock, flags);
1406 ptask->max_payload = max_payload;
1407 ptask->enqueued = 0;
1409 fwnet_send_packet(ptask);
1411 return NETDEV_TX_OK;
1414 spin_unlock_irqrestore(&dev->lock, flags);
1417 kmem_cache_free(fwnet_packet_task_cache, ptask);
1422 net->stats.tx_dropped++;
1423 net->stats.tx_errors++;
1426 * FIXME: According to a patch from 2003-02-26, "returning non-zero
1427 * causes serious problems" here, allegedly. Before that patch,
1428 * -ERRNO was returned which is not appropriate under Linux 2.6.
1429 * Perhaps more needs to be done? Stop the queue in serious
1430 * conditions and restart it elsewhere?
1432 return NETDEV_TX_OK;
1435 static int fwnet_change_mtu(struct net_device *net, int new_mtu)
1444 static const struct ethtool_ops fwnet_ethtool_ops = {
1445 .get_link = ethtool_op_get_link,
1448 static const struct net_device_ops fwnet_netdev_ops = {
1449 .ndo_open = fwnet_open,
1450 .ndo_stop = fwnet_stop,
1451 .ndo_start_xmit = fwnet_tx,
1452 .ndo_change_mtu = fwnet_change_mtu,
1455 static void fwnet_init_dev(struct net_device *net)
1457 net->header_ops = &fwnet_header_ops;
1458 net->netdev_ops = &fwnet_netdev_ops;
1459 net->watchdog_timeo = 2 * HZ;
1460 net->flags = IFF_BROADCAST | IFF_MULTICAST;
1461 net->features = NETIF_F_HIGHDMA;
1462 net->addr_len = FWNET_ALEN;
1463 net->hard_header_len = FWNET_HLEN;
1464 net->type = ARPHRD_IEEE1394;
1465 net->tx_queue_len = FWNET_TX_QUEUE_LEN;
1466 net->ethtool_ops = &fwnet_ethtool_ops;
1469 /* caller must hold fwnet_device_mutex */
1470 static struct fwnet_device *fwnet_dev_find(struct fw_card *card)
1472 struct fwnet_device *dev;
1474 list_for_each_entry(dev, &fwnet_device_list, dev_link)
1475 if (dev->card == card)
1481 static int fwnet_add_peer(struct fwnet_device *dev,
1482 struct fw_unit *unit, struct fw_device *device)
1484 struct fwnet_peer *peer;
1486 peer = kmalloc(sizeof(*peer), GFP_KERNEL);
1490 dev_set_drvdata(&unit->device, peer);
1493 peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
1494 peer->fifo = FWNET_NO_FIFO_ADDR;
1496 INIT_LIST_HEAD(&peer->pd_list);
1498 peer->datagram_label = 0;
1499 peer->speed = device->max_speed;
1500 peer->max_payload = fwnet_max_payload(device->max_rec, peer->speed);
1502 peer->generation = device->generation;
1504 peer->node_id = device->node_id;
1506 spin_lock_irq(&dev->lock);
1507 list_add_tail(&peer->peer_link, &dev->peer_list);
1509 set_carrier_state(dev);
1510 spin_unlock_irq(&dev->lock);
1515 static int fwnet_probe(struct device *_dev)
1517 struct fw_unit *unit = fw_unit(_dev);
1518 struct fw_device *device = fw_parent_device(unit);
1519 struct fw_card *card = device->card;
1520 struct net_device *net;
1521 bool allocated_netdev = false;
1522 struct fwnet_device *dev;
1526 mutex_lock(&fwnet_device_mutex);
1528 dev = fwnet_dev_find(card);
1534 net = alloc_netdev(sizeof(*dev), "firewire%d", fwnet_init_dev);
1540 allocated_netdev = true;
1541 SET_NETDEV_DEV(net, card->device);
1542 dev = netdev_priv(net);
1544 spin_lock_init(&dev->lock);
1545 dev->broadcast_state = FWNET_BROADCAST_ERROR;
1546 dev->broadcast_rcv_context = NULL;
1547 dev->broadcast_xmt_max_payload = 0;
1548 dev->broadcast_xmt_datagramlabel = 0;
1549 dev->local_fifo = FWNET_NO_FIFO_ADDR;
1550 dev->queued_datagrams = 0;
1551 INIT_LIST_HEAD(&dev->peer_list);
1556 * Use the RFC 2734 default 1500 octets or the maximum payload
1559 max_mtu = (1 << (card->max_receive + 1))
1560 - sizeof(struct rfc2734_header) - IEEE1394_GASP_HDR_SIZE;
1561 net->mtu = min(1500U, max_mtu);
1563 /* Set our hardware address while we're at it */
1564 put_unaligned_be64(card->guid, net->dev_addr);
1565 put_unaligned_be64(~0ULL, net->broadcast);
1566 ret = register_netdev(net);
1568 fw_error("Cannot register the driver\n");
1572 list_add_tail(&dev->dev_link, &fwnet_device_list);
1573 fw_notify("%s: IPv4 over FireWire on device %016llx\n",
1574 net->name, (unsigned long long)card->guid);
1576 ret = fwnet_add_peer(dev, unit, device);
1577 if (ret && allocated_netdev) {
1578 unregister_netdev(net);
1579 list_del(&dev->dev_link);
1582 if (ret && allocated_netdev)
1585 mutex_unlock(&fwnet_device_mutex);
1590 static void fwnet_remove_peer(struct fwnet_peer *peer, struct fwnet_device *dev)
1592 struct fwnet_partial_datagram *pd, *pd_next;
1594 spin_lock_irq(&dev->lock);
1595 list_del(&peer->peer_link);
1597 set_carrier_state(dev);
1598 spin_unlock_irq(&dev->lock);
1600 list_for_each_entry_safe(pd, pd_next, &peer->pd_list, pd_link)
1601 fwnet_pd_delete(pd);
1606 static int fwnet_remove(struct device *_dev)
1608 struct fwnet_peer *peer = dev_get_drvdata(_dev);
1609 struct fwnet_device *dev = peer->dev;
1610 struct net_device *net;
1613 mutex_lock(&fwnet_device_mutex);
1616 if (net && peer->ip)
1617 arp_invalidate(net, peer->ip);
1619 fwnet_remove_peer(peer, dev);
1621 if (list_empty(&dev->peer_list)) {
1622 unregister_netdev(net);
1624 if (dev->local_fifo != FWNET_NO_FIFO_ADDR)
1625 fw_core_remove_address_handler(&dev->handler);
1626 if (dev->broadcast_rcv_context) {
1627 fw_iso_context_stop(dev->broadcast_rcv_context);
1628 fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer,
1630 fw_iso_context_destroy(dev->broadcast_rcv_context);
1632 for (i = 0; dev->queued_datagrams && i < 5; i++)
1634 WARN_ON(dev->queued_datagrams);
1635 list_del(&dev->dev_link);
1640 mutex_unlock(&fwnet_device_mutex);
1646 * FIXME abort partially sent fragmented datagrams,
1647 * discard partially received fragmented datagrams
1649 static void fwnet_update(struct fw_unit *unit)
1651 struct fw_device *device = fw_parent_device(unit);
1652 struct fwnet_peer *peer = dev_get_drvdata(&unit->device);
1655 generation = device->generation;
1657 spin_lock_irq(&peer->dev->lock);
1658 peer->node_id = device->node_id;
1659 peer->generation = generation;
1660 spin_unlock_irq(&peer->dev->lock);
1663 static const struct ieee1394_device_id fwnet_id_table[] = {
1665 .match_flags = IEEE1394_MATCH_SPECIFIER_ID |
1666 IEEE1394_MATCH_VERSION,
1667 .specifier_id = IANA_SPECIFIER_ID,
1668 .version = RFC2734_SW_VERSION,
1673 static struct fw_driver fwnet_driver = {
1675 .owner = THIS_MODULE,
1677 .bus = &fw_bus_type,
1678 .probe = fwnet_probe,
1679 .remove = fwnet_remove,
1681 .update = fwnet_update,
1682 .id_table = fwnet_id_table,
1685 static const u32 rfc2374_unit_directory_data[] = {
1686 0x00040000, /* directory_length */
1687 0x1200005e, /* unit_specifier_id: IANA */
1688 0x81000003, /* textual descriptor offset */
1689 0x13000001, /* unit_sw_version: RFC 2734 */
1690 0x81000005, /* textual descriptor offset */
1691 0x00030000, /* descriptor_length */
1692 0x00000000, /* text */
1693 0x00000000, /* minimal ASCII, en */
1694 0x49414e41, /* I A N A */
1695 0x00030000, /* descriptor_length */
1696 0x00000000, /* text */
1697 0x00000000, /* minimal ASCII, en */
1698 0x49507634, /* I P v 4 */
1701 static struct fw_descriptor rfc2374_unit_directory = {
1702 .length = ARRAY_SIZE(rfc2374_unit_directory_data),
1703 .key = (CSR_DIRECTORY | CSR_UNIT) << 24,
1704 .data = rfc2374_unit_directory_data
1707 static int __init fwnet_init(void)
1711 err = fw_core_add_descriptor(&rfc2374_unit_directory);
1715 fwnet_packet_task_cache = kmem_cache_create("packet_task",
1716 sizeof(struct fwnet_packet_task), 0, 0, NULL);
1717 if (!fwnet_packet_task_cache) {
1722 err = driver_register(&fwnet_driver.driver);
1726 kmem_cache_destroy(fwnet_packet_task_cache);
1728 fw_core_remove_descriptor(&rfc2374_unit_directory);
1732 module_init(fwnet_init);
1734 static void __exit fwnet_cleanup(void)
1736 driver_unregister(&fwnet_driver.driver);
1737 kmem_cache_destroy(fwnet_packet_task_cache);
1738 fw_core_remove_descriptor(&rfc2374_unit_directory);
1740 module_exit(fwnet_cleanup);
1742 MODULE_AUTHOR("Jay Fenlason <fenlason@redhat.com>");
1743 MODULE_DESCRIPTION("IPv4 over IEEE1394 as per RFC 2734");
1744 MODULE_LICENSE("GPL");
1745 MODULE_DEVICE_TABLE(ieee1394, fwnet_id_table);