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/device.h>
11 #include <linux/firewire.h>
12 #include <linux/firewire-constants.h>
13 #include <linux/highmem.h>
16 #include <linux/jiffies.h>
17 #include <linux/mod_devicetable.h>
18 #include <linux/module.h>
19 #include <linux/moduleparam.h>
20 #include <linux/mutex.h>
21 #include <linux/netdevice.h>
22 #include <linux/skbuff.h>
23 #include <linux/slab.h>
24 #include <linux/spinlock.h>
26 #include <asm/unaligned.h>
29 #define FWNET_MAX_FRAGMENTS 25 /* arbitrary limit */
30 #define FWNET_ISO_PAGE_COUNT (PAGE_SIZE < 16 * 1024 ? 4 : 2)
32 #define IEEE1394_BROADCAST_CHANNEL 31
33 #define IEEE1394_ALL_NODES (0xffc0 | 0x003f)
34 #define IEEE1394_MAX_PAYLOAD_S100 512
35 #define FWNET_NO_FIFO_ADDR (~0ULL)
37 #define IANA_SPECIFIER_ID 0x00005eU
38 #define RFC2734_SW_VERSION 0x000001U
40 #define IEEE1394_GASP_HDR_SIZE 8
42 #define RFC2374_UNFRAG_HDR_SIZE 4
43 #define RFC2374_FRAG_HDR_SIZE 8
44 #define RFC2374_FRAG_OVERHEAD 4
46 #define RFC2374_HDR_UNFRAG 0 /* unfragmented */
47 #define RFC2374_HDR_FIRSTFRAG 1 /* first fragment */
48 #define RFC2374_HDR_LASTFRAG 2 /* last fragment */
49 #define RFC2374_HDR_INTFRAG 3 /* interior fragment */
51 #define RFC2734_HW_ADDR_LEN 16
54 __be16 hw_type
; /* 0x0018 */
55 __be16 proto_type
; /* 0x0806 */
56 u8 hw_addr_len
; /* 16 */
57 u8 ip_addr_len
; /* 4 */
58 __be16 opcode
; /* ARP Opcode */
59 /* Above is exactly the same format as struct arphdr */
61 __be64 s_uniq_id
; /* Sender's 64bit EUI */
62 u8 max_rec
; /* Sender's max packet size */
63 u8 sspd
; /* Sender's max speed */
64 __be16 fifo_hi
; /* hi 16bits of sender's FIFO addr */
65 __be32 fifo_lo
; /* lo 32bits of sender's FIFO addr */
66 __be32 sip
; /* Sender's IP Address */
67 __be32 tip
; /* IP Address of requested hw addr */
68 } __attribute__((packed
));
70 /* This header format is specific to this driver implementation. */
74 u8 h_dest
[FWNET_ALEN
]; /* destination address */
75 __be16 h_proto
; /* packet type ID field */
76 } __attribute__((packed
));
78 /* IPv4 and IPv6 encapsulation header */
79 struct rfc2734_header
{
84 #define fwnet_get_hdr_lf(h) (((h)->w0 & 0xc0000000) >> 30)
85 #define fwnet_get_hdr_ether_type(h) (((h)->w0 & 0x0000ffff))
86 #define fwnet_get_hdr_dg_size(h) (((h)->w0 & 0x0fff0000) >> 16)
87 #define fwnet_get_hdr_fg_off(h) (((h)->w0 & 0x00000fff))
88 #define fwnet_get_hdr_dgl(h) (((h)->w1 & 0xffff0000) >> 16)
90 #define fwnet_set_hdr_lf(lf) ((lf) << 30)
91 #define fwnet_set_hdr_ether_type(et) (et)
92 #define fwnet_set_hdr_dg_size(dgs) ((dgs) << 16)
93 #define fwnet_set_hdr_fg_off(fgo) (fgo)
95 #define fwnet_set_hdr_dgl(dgl) ((dgl) << 16)
97 static inline void fwnet_make_uf_hdr(struct rfc2734_header
*hdr
,
100 hdr
->w0
= fwnet_set_hdr_lf(RFC2374_HDR_UNFRAG
)
101 | fwnet_set_hdr_ether_type(ether_type
);
104 static inline void fwnet_make_ff_hdr(struct rfc2734_header
*hdr
,
105 unsigned ether_type
, unsigned dg_size
, unsigned dgl
)
107 hdr
->w0
= fwnet_set_hdr_lf(RFC2374_HDR_FIRSTFRAG
)
108 | fwnet_set_hdr_dg_size(dg_size
)
109 | fwnet_set_hdr_ether_type(ether_type
);
110 hdr
->w1
= fwnet_set_hdr_dgl(dgl
);
113 static inline void fwnet_make_sf_hdr(struct rfc2734_header
*hdr
,
114 unsigned lf
, unsigned dg_size
, unsigned fg_off
, unsigned dgl
)
116 hdr
->w0
= fwnet_set_hdr_lf(lf
)
117 | fwnet_set_hdr_dg_size(dg_size
)
118 | fwnet_set_hdr_fg_off(fg_off
);
119 hdr
->w1
= fwnet_set_hdr_dgl(dgl
);
122 /* This list keeps track of what parts of the datagram have been filled in */
123 struct fwnet_fragment_info
{
124 struct list_head fi_link
;
129 struct fwnet_partial_datagram
{
130 struct list_head pd_link
;
131 struct list_head fi_list
;
133 /* FIXME Why not use skb->data? */
140 static DEFINE_MUTEX(fwnet_device_mutex
);
141 static LIST_HEAD(fwnet_device_list
);
143 struct fwnet_device
{
144 struct list_head dev_link
;
147 FWNET_BROADCAST_ERROR
,
148 FWNET_BROADCAST_RUNNING
,
149 FWNET_BROADCAST_STOPPED
,
151 struct fw_iso_context
*broadcast_rcv_context
;
152 struct fw_iso_buffer broadcast_rcv_buffer
;
153 void **broadcast_rcv_buffer_ptrs
;
154 unsigned broadcast_rcv_next_ptr
;
155 unsigned num_broadcast_rcv_ptrs
;
156 unsigned rcv_buffer_size
;
158 * This value is the maximum unfragmented datagram size that can be
159 * sent by the hardware. It already has the GASP overhead and the
160 * unfragmented datagram header overhead calculated into it.
162 unsigned broadcast_xmt_max_payload
;
163 u16 broadcast_xmt_datagramlabel
;
166 * The CSR address that remote nodes must send datagrams to for us to
169 struct fw_address_handler handler
;
172 /* List of packets to be sent */
173 struct list_head packet_list
;
175 * List of packets that were broadcasted. When we get an ISO interrupt
176 * one of them has been sent
178 struct list_head broadcasted_list
;
179 /* List of packets that have been sent but not yet acked */
180 struct list_head sent_list
;
182 struct list_head peer_list
;
183 struct fw_card
*card
;
184 struct net_device
*netdev
;
188 struct list_head peer_link
;
189 struct fwnet_device
*dev
;
193 /* guarded by dev->lock */
194 struct list_head pd_list
; /* received partial datagrams */
195 unsigned pdg_size
; /* pd_list size */
197 u16 datagram_label
; /* outgoing datagram label */
198 unsigned max_payload
; /* includes RFC2374_FRAG_HDR_SIZE overhead */
204 /* This is our task struct. It's used for the packet complete callback. */
205 struct fwnet_packet_task
{
207 * ptask can actually be on dev->packet_list, dev->broadcasted_list,
208 * or dev->sent_list depending on its current state.
210 struct list_head pt_link
;
211 struct fw_transaction transaction
;
212 struct rfc2734_header hdr
;
214 struct fwnet_device
*dev
;
216 int outstanding_pkts
;
217 unsigned max_payload
;
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
,
267 struct net_device
*net
;
268 struct fwnet_header
*h
;
270 if (hh
->hh_type
== cpu_to_be16(ETH_P_802_3
))
273 h
= (struct fwnet_header
*)((u8
*)hh
->hh_data
+ 16 - sizeof(*h
));
274 h
->h_proto
= hh
->hh_type
;
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 beginnig 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
= min(max_rec
, 0xbU
); /* <= 4096 */
507 fw_notify("max_rec %x out of range\n", max_rec
);
511 return (1 << (max_rec
+ 1)) - RFC2374_FRAG_HDR_SIZE
;
515 static int fwnet_finish_incoming_packet(struct net_device
*net
,
516 struct sk_buff
*skb
, u16 source_node_id
,
517 bool is_broadcast
, u16 ether_type
)
519 struct fwnet_device
*dev
;
520 static const __be64 broadcast_hw
= cpu_to_be64(~0ULL);
524 dev
= netdev_priv(net
);
525 /* Write metadata, and then pass to the receive level */
527 skb
->ip_summed
= CHECKSUM_UNNECESSARY
; /* don't check it */
530 * Parse the encapsulation header. This actually does the job of
531 * converting to an ethernet frame header, as well as arp
532 * conversion if needed. ARP conversion is easier in this
533 * direction, since we are using ethernet as our backend.
536 * If this is an ARP packet, convert it. First, we want to make
537 * use of some of the fields, since they tell us a little bit
538 * about the sending machine.
540 if (ether_type
== ETH_P_ARP
) {
541 struct rfc2734_arp
*arp1394
;
543 unsigned char *arp_ptr
;
548 struct fwnet_peer
*peer
;
551 arp1394
= (struct rfc2734_arp
*)skb
->data
;
552 arp
= (struct arphdr
*)skb
->data
;
553 arp_ptr
= (unsigned char *)(arp
+ 1);
554 peer_guid
= get_unaligned_be64(&arp1394
->s_uniq_id
);
555 fifo_addr
= (u64
)get_unaligned_be16(&arp1394
->fifo_hi
) << 32
556 | get_unaligned_be32(&arp1394
->fifo_lo
);
558 sspd
= arp1394
->sspd
;
559 /* Sanity check. OS X 10.3 PPC reportedly sends 131. */
560 if (sspd
> SCODE_3200
) {
561 fw_notify("sspd %x out of range\n", sspd
);
564 max_payload
= fwnet_max_payload(arp1394
->max_rec
, sspd
);
566 spin_lock_irqsave(&dev
->lock
, flags
);
567 peer
= fwnet_peer_find_by_guid(dev
, peer_guid
);
569 peer
->fifo
= fifo_addr
;
571 if (peer
->speed
> sspd
)
573 if (peer
->max_payload
> max_payload
)
574 peer
->max_payload
= max_payload
;
576 spin_unlock_irqrestore(&dev
->lock
, flags
);
579 fw_notify("No peer for ARP packet from %016llx\n",
580 (unsigned long long)peer_guid
);
585 * Now that we're done with the 1394 specific stuff, we'll
586 * need to alter some of the data. Believe it or not, all
587 * that needs to be done is sender_IP_address needs to be
588 * moved, the destination hardware address get stuffed
589 * in and the hardware address length set to 8.
591 * IMPORTANT: The code below overwrites 1394 specific data
592 * needed above so keep the munging of the data for the
593 * higher level IP stack last.
597 /* skip over sender unique id */
598 arp_ptr
+= arp
->ar_hln
;
599 /* move sender IP addr */
600 put_unaligned(arp1394
->sip
, (u32
*)arp_ptr
);
601 /* skip over sender IP addr */
602 arp_ptr
+= arp
->ar_pln
;
604 if (arp
->ar_op
== htons(ARPOP_REQUEST
))
605 memset(arp_ptr
, 0, sizeof(u64
));
607 memcpy(arp_ptr
, net
->dev_addr
, sizeof(u64
));
610 /* Now add the ethernet header. */
611 guid
= cpu_to_be64(dev
->card
->guid
);
612 if (dev_hard_header(skb
, net
, ether_type
,
613 is_broadcast
? &broadcast_hw
: &guid
,
614 NULL
, skb
->len
) >= 0) {
615 struct fwnet_header
*eth
;
619 skb_reset_mac_header(skb
);
620 skb_pull(skb
, sizeof(*eth
));
621 eth
= (struct fwnet_header
*)skb_mac_header(skb
);
622 if (*eth
->h_dest
& 1) {
623 if (memcmp(eth
->h_dest
, net
->broadcast
,
625 skb
->pkt_type
= PACKET_BROADCAST
;
628 skb
->pkt_type
= PACKET_MULTICAST
;
631 if (memcmp(eth
->h_dest
, net
->dev_addr
, net
->addr_len
))
632 skb
->pkt_type
= PACKET_OTHERHOST
;
634 if (ntohs(eth
->h_proto
) >= 1536) {
635 protocol
= eth
->h_proto
;
637 rawp
= (u16
*)skb
->data
;
639 protocol
= htons(ETH_P_802_3
);
641 protocol
= htons(ETH_P_802_2
);
643 skb
->protocol
= protocol
;
645 status
= netif_rx(skb
);
646 if (status
== NET_RX_DROP
) {
647 net
->stats
.rx_errors
++;
648 net
->stats
.rx_dropped
++;
650 net
->stats
.rx_packets
++;
651 net
->stats
.rx_bytes
+= skb
->len
;
653 if (netif_queue_stopped(net
))
654 netif_wake_queue(net
);
659 net
->stats
.rx_errors
++;
660 net
->stats
.rx_dropped
++;
662 dev_kfree_skb_any(skb
);
663 if (netif_queue_stopped(net
))
664 netif_wake_queue(net
);
669 static int fwnet_incoming_packet(struct fwnet_device
*dev
, __be32
*buf
, int len
,
670 int source_node_id
, int generation
,
674 struct net_device
*net
= dev
->netdev
;
675 struct rfc2734_header hdr
;
678 struct fwnet_peer
*peer
;
679 struct fwnet_partial_datagram
*pd
;
686 hdr
.w0
= be32_to_cpu(buf
[0]);
687 lf
= fwnet_get_hdr_lf(&hdr
);
688 if (lf
== RFC2374_HDR_UNFRAG
) {
690 * An unfragmented datagram has been received by the ieee1394
691 * bus. Build an skbuff around it so we can pass it to the
692 * high level network layer.
694 ether_type
= fwnet_get_hdr_ether_type(&hdr
);
696 len
-= RFC2374_UNFRAG_HDR_SIZE
;
698 skb
= dev_alloc_skb(len
+ net
->hard_header_len
+ 15);
699 if (unlikely(!skb
)) {
700 fw_error("out of memory\n");
701 net
->stats
.rx_dropped
++;
705 skb_reserve(skb
, (net
->hard_header_len
+ 15) & ~15);
706 memcpy(skb_put(skb
, len
), buf
, len
);
708 return fwnet_finish_incoming_packet(net
, skb
, source_node_id
,
709 is_broadcast
, ether_type
);
711 /* A datagram fragment has been received, now the fun begins. */
712 hdr
.w1
= ntohl(buf
[1]);
714 len
-= RFC2374_FRAG_HDR_SIZE
;
715 if (lf
== RFC2374_HDR_FIRSTFRAG
) {
716 ether_type
= fwnet_get_hdr_ether_type(&hdr
);
720 fg_off
= fwnet_get_hdr_fg_off(&hdr
);
722 datagram_label
= fwnet_get_hdr_dgl(&hdr
);
723 dg_size
= fwnet_get_hdr_dg_size(&hdr
); /* ??? + 1 */
725 spin_lock_irqsave(&dev
->lock
, flags
);
727 peer
= fwnet_peer_find_by_node_id(dev
, source_node_id
, generation
);
733 pd
= fwnet_pd_find(peer
, datagram_label
);
735 while (peer
->pdg_size
>= FWNET_MAX_FRAGMENTS
) {
736 /* remove the oldest */
737 fwnet_pd_delete(list_first_entry(&peer
->pd_list
,
738 struct fwnet_partial_datagram
, pd_link
));
741 pd
= fwnet_pd_new(net
, peer
, datagram_label
,
742 dg_size
, buf
, fg_off
, len
);
749 if (fwnet_frag_overlap(pd
, fg_off
, len
) ||
750 pd
->datagram_size
!= dg_size
) {
752 * Differing datagram sizes or overlapping fragments,
753 * discard old datagram and start a new one.
756 pd
= fwnet_pd_new(net
, peer
, datagram_label
,
757 dg_size
, buf
, fg_off
, len
);
764 if (!fwnet_pd_update(peer
, pd
, buf
, fg_off
, len
)) {
766 * Couldn't save off fragment anyway
767 * so might as well obliterate the
776 } /* new datagram or add to existing one */
778 if (lf
== RFC2374_HDR_FIRSTFRAG
)
779 pd
->ether_type
= ether_type
;
781 if (fwnet_pd_is_complete(pd
)) {
782 ether_type
= pd
->ether_type
;
784 skb
= skb_get(pd
->skb
);
787 spin_unlock_irqrestore(&dev
->lock
, flags
);
789 return fwnet_finish_incoming_packet(net
, skb
, source_node_id
,
793 * Datagram is not complete, we're done for the
796 spin_unlock_irqrestore(&dev
->lock
, flags
);
800 spin_unlock_irqrestore(&dev
->lock
, flags
);
802 if (netif_queue_stopped(net
))
803 netif_wake_queue(net
);
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 void fwnet_receive_broadcast(struct fw_iso_context
*context
,
837 u32 cycle
, size_t header_length
, void *header
, void *data
)
839 struct fwnet_device
*dev
;
840 struct fw_iso_packet packet
;
841 struct fw_card
*card
;
849 unsigned long offset
;
855 length
= be16_to_cpup(hdr_ptr
);
857 spin_lock_irqsave(&dev
->lock
, flags
);
859 offset
= dev
->rcv_buffer_size
* dev
->broadcast_rcv_next_ptr
;
860 buf_ptr
= dev
->broadcast_rcv_buffer_ptrs
[dev
->broadcast_rcv_next_ptr
++];
861 if (dev
->broadcast_rcv_next_ptr
== dev
->num_broadcast_rcv_ptrs
)
862 dev
->broadcast_rcv_next_ptr
= 0;
864 spin_unlock_irqrestore(&dev
->lock
, flags
);
866 specifier_id
= (be32_to_cpu(buf_ptr
[0]) & 0xffff) << 8
867 | (be32_to_cpu(buf_ptr
[1]) & 0xff000000) >> 24;
868 ver
= be32_to_cpu(buf_ptr
[1]) & 0xffffff;
869 source_node_id
= be32_to_cpu(buf_ptr
[0]) >> 16;
871 if (specifier_id
== IANA_SPECIFIER_ID
&& ver
== RFC2734_SW_VERSION
) {
873 length
-= IEEE1394_GASP_HDR_SIZE
;
874 fwnet_incoming_packet(dev
, buf_ptr
, length
,
875 source_node_id
, -1, true);
878 packet
.payload_length
= dev
->rcv_buffer_size
;
879 packet
.interrupt
= 1;
883 packet
.header_length
= IEEE1394_GASP_HDR_SIZE
;
885 spin_lock_irqsave(&dev
->lock
, flags
);
887 retval
= fw_iso_context_queue(dev
->broadcast_rcv_context
, &packet
,
888 &dev
->broadcast_rcv_buffer
, offset
);
890 spin_unlock_irqrestore(&dev
->lock
, flags
);
893 fw_error("requeue failed\n");
896 static struct kmem_cache
*fwnet_packet_task_cache
;
898 static void fwnet_free_ptask(struct fwnet_packet_task
*ptask
)
900 dev_kfree_skb_any(ptask
->skb
);
901 kmem_cache_free(fwnet_packet_task_cache
, ptask
);
904 static int fwnet_send_packet(struct fwnet_packet_task
*ptask
);
906 static void fwnet_transmit_packet_done(struct fwnet_packet_task
*ptask
)
908 struct fwnet_device
*dev
= ptask
->dev
;
912 spin_lock_irqsave(&dev
->lock
, flags
);
914 ptask
->outstanding_pkts
--;
916 /* Check whether we or the networking TX soft-IRQ is last user. */
917 free
= (ptask
->outstanding_pkts
== 0 && !list_empty(&ptask
->pt_link
));
919 if (ptask
->outstanding_pkts
== 0)
920 list_del(&ptask
->pt_link
);
922 spin_unlock_irqrestore(&dev
->lock
, flags
);
924 if (ptask
->outstanding_pkts
> 0) {
931 /* Update the ptask to point to the next fragment and send it */
932 lf
= fwnet_get_hdr_lf(&ptask
->hdr
);
934 case RFC2374_HDR_LASTFRAG
:
935 case RFC2374_HDR_UNFRAG
:
937 fw_error("Outstanding packet %x lf %x, header %x,%x\n",
938 ptask
->outstanding_pkts
, lf
, ptask
->hdr
.w0
,
942 case RFC2374_HDR_FIRSTFRAG
:
943 /* Set frag type here for future interior fragments */
944 dg_size
= fwnet_get_hdr_dg_size(&ptask
->hdr
);
945 fg_off
= ptask
->max_payload
- RFC2374_FRAG_HDR_SIZE
;
946 datagram_label
= fwnet_get_hdr_dgl(&ptask
->hdr
);
949 case RFC2374_HDR_INTFRAG
:
950 dg_size
= fwnet_get_hdr_dg_size(&ptask
->hdr
);
951 fg_off
= fwnet_get_hdr_fg_off(&ptask
->hdr
)
952 + ptask
->max_payload
- RFC2374_FRAG_HDR_SIZE
;
953 datagram_label
= fwnet_get_hdr_dgl(&ptask
->hdr
);
957 skb_pull(skb
, ptask
->max_payload
);
958 if (ptask
->outstanding_pkts
> 1) {
959 fwnet_make_sf_hdr(&ptask
->hdr
, RFC2374_HDR_INTFRAG
,
960 dg_size
, fg_off
, datagram_label
);
962 fwnet_make_sf_hdr(&ptask
->hdr
, RFC2374_HDR_LASTFRAG
,
963 dg_size
, fg_off
, datagram_label
);
964 ptask
->max_payload
= skb
->len
+ RFC2374_FRAG_HDR_SIZE
;
966 fwnet_send_packet(ptask
);
970 fwnet_free_ptask(ptask
);
973 static void fwnet_write_complete(struct fw_card
*card
, int rcode
,
974 void *payload
, size_t length
, void *data
)
976 struct fwnet_packet_task
*ptask
;
980 if (rcode
== RCODE_COMPLETE
)
981 fwnet_transmit_packet_done(ptask
);
983 fw_error("fwnet_write_complete: failed: %x\n", rcode
);
984 /* ??? error recovery */
987 static int fwnet_send_packet(struct fwnet_packet_task
*ptask
)
989 struct fwnet_device
*dev
;
991 struct rfc2734_header
*bufhdr
;
996 tx_len
= ptask
->max_payload
;
997 switch (fwnet_get_hdr_lf(&ptask
->hdr
)) {
998 case RFC2374_HDR_UNFRAG
:
999 bufhdr
= (struct rfc2734_header
*)
1000 skb_push(ptask
->skb
, RFC2374_UNFRAG_HDR_SIZE
);
1001 put_unaligned_be32(ptask
->hdr
.w0
, &bufhdr
->w0
);
1004 case RFC2374_HDR_FIRSTFRAG
:
1005 case RFC2374_HDR_INTFRAG
:
1006 case RFC2374_HDR_LASTFRAG
:
1007 bufhdr
= (struct rfc2734_header
*)
1008 skb_push(ptask
->skb
, RFC2374_FRAG_HDR_SIZE
);
1009 put_unaligned_be32(ptask
->hdr
.w0
, &bufhdr
->w0
);
1010 put_unaligned_be32(ptask
->hdr
.w1
, &bufhdr
->w1
);
1016 if (ptask
->dest_node
== IEEE1394_ALL_NODES
) {
1021 /* ptask->generation may not have been set yet */
1022 generation
= dev
->card
->generation
;
1024 node_id
= dev
->card
->node_id
;
1026 p
= skb_push(ptask
->skb
, 8);
1027 put_unaligned_be32(node_id
<< 16 | IANA_SPECIFIER_ID
>> 8, p
);
1028 put_unaligned_be32((IANA_SPECIFIER_ID
& 0xff) << 24
1029 | RFC2734_SW_VERSION
, &p
[4]);
1031 /* We should not transmit if broadcast_channel.valid == 0. */
1032 fw_send_request(dev
->card
, &ptask
->transaction
,
1034 fw_stream_packet_destination_id(3,
1035 IEEE1394_BROADCAST_CHANNEL
, 0),
1036 generation
, SCODE_100
, 0ULL, ptask
->skb
->data
,
1037 tx_len
+ 8, fwnet_write_complete
, ptask
);
1039 spin_lock_irqsave(&dev
->lock
, flags
);
1041 /* If the AT tasklet already ran, we may be last user. */
1042 free
= (ptask
->outstanding_pkts
== 0 && list_empty(&ptask
->pt_link
));
1044 list_add_tail(&ptask
->pt_link
, &dev
->broadcasted_list
);
1046 spin_unlock_irqrestore(&dev
->lock
, flags
);
1051 fw_send_request(dev
->card
, &ptask
->transaction
,
1052 TCODE_WRITE_BLOCK_REQUEST
, ptask
->dest_node
,
1053 ptask
->generation
, ptask
->speed
, ptask
->fifo_addr
,
1054 ptask
->skb
->data
, tx_len
, fwnet_write_complete
, ptask
);
1056 spin_lock_irqsave(&dev
->lock
, flags
);
1058 /* If the AT tasklet already ran, we may be last user. */
1059 free
= (ptask
->outstanding_pkts
== 0 && list_empty(&ptask
->pt_link
));
1061 list_add_tail(&ptask
->pt_link
, &dev
->sent_list
);
1063 spin_unlock_irqrestore(&dev
->lock
, flags
);
1065 dev
->netdev
->trans_start
= jiffies
;
1068 fwnet_free_ptask(ptask
);
1073 static int fwnet_broadcast_start(struct fwnet_device
*dev
)
1075 struct fw_iso_context
*context
;
1077 unsigned num_packets
;
1078 unsigned max_receive
;
1079 struct fw_iso_packet packet
;
1080 unsigned long offset
;
1083 if (dev
->local_fifo
== FWNET_NO_FIFO_ADDR
) {
1084 /* outside OHCI posted write area? */
1085 static const struct fw_address_region region
= {
1086 .start
= 0xffff00000000ULL
,
1087 .end
= CSR_REGISTER_BASE
,
1090 dev
->handler
.length
= 4096;
1091 dev
->handler
.address_callback
= fwnet_receive_packet
;
1092 dev
->handler
.callback_data
= dev
;
1094 retval
= fw_core_add_address_handler(&dev
->handler
, ®ion
);
1096 goto failed_initial
;
1098 dev
->local_fifo
= dev
->handler
.offset
;
1101 max_receive
= 1U << (dev
->card
->max_receive
+ 1);
1102 num_packets
= (FWNET_ISO_PAGE_COUNT
* PAGE_SIZE
) / max_receive
;
1104 if (!dev
->broadcast_rcv_context
) {
1107 context
= fw_iso_context_create(dev
->card
,
1108 FW_ISO_CONTEXT_RECEIVE
, IEEE1394_BROADCAST_CHANNEL
,
1109 dev
->card
->link_speed
, 8, fwnet_receive_broadcast
, dev
);
1110 if (IS_ERR(context
)) {
1111 retval
= PTR_ERR(context
);
1112 goto failed_context_create
;
1115 retval
= fw_iso_buffer_init(&dev
->broadcast_rcv_buffer
,
1116 dev
->card
, FWNET_ISO_PAGE_COUNT
, DMA_FROM_DEVICE
);
1118 goto failed_buffer_init
;
1120 ptrptr
= kmalloc(sizeof(void *) * num_packets
, GFP_KERNEL
);
1123 goto failed_ptrs_alloc
;
1126 dev
->broadcast_rcv_buffer_ptrs
= ptrptr
;
1127 for (u
= 0; u
< FWNET_ISO_PAGE_COUNT
; u
++) {
1131 ptr
= kmap(dev
->broadcast_rcv_buffer
.pages
[u
]);
1132 for (v
= 0; v
< num_packets
/ FWNET_ISO_PAGE_COUNT
; v
++)
1133 *ptrptr
++ = (void *)
1134 ((char *)ptr
+ v
* max_receive
);
1136 dev
->broadcast_rcv_context
= context
;
1138 context
= dev
->broadcast_rcv_context
;
1141 packet
.payload_length
= max_receive
;
1142 packet
.interrupt
= 1;
1146 packet
.header_length
= IEEE1394_GASP_HDR_SIZE
;
1149 for (u
= 0; u
< num_packets
; u
++) {
1150 retval
= fw_iso_context_queue(context
, &packet
,
1151 &dev
->broadcast_rcv_buffer
, offset
);
1153 goto failed_rcv_queue
;
1155 offset
+= max_receive
;
1157 dev
->num_broadcast_rcv_ptrs
= num_packets
;
1158 dev
->rcv_buffer_size
= max_receive
;
1159 dev
->broadcast_rcv_next_ptr
= 0U;
1160 retval
= fw_iso_context_start(context
, -1, 0,
1161 FW_ISO_CONTEXT_MATCH_ALL_TAGS
); /* ??? sync */
1163 goto failed_rcv_queue
;
1165 /* FIXME: adjust it according to the min. speed of all known peers? */
1166 dev
->broadcast_xmt_max_payload
= IEEE1394_MAX_PAYLOAD_S100
1167 - IEEE1394_GASP_HDR_SIZE
- RFC2374_UNFRAG_HDR_SIZE
;
1168 dev
->broadcast_state
= FWNET_BROADCAST_RUNNING
;
1173 kfree(dev
->broadcast_rcv_buffer_ptrs
);
1174 dev
->broadcast_rcv_buffer_ptrs
= NULL
;
1176 fw_iso_buffer_destroy(&dev
->broadcast_rcv_buffer
, dev
->card
);
1178 fw_iso_context_destroy(context
);
1179 dev
->broadcast_rcv_context
= NULL
;
1180 failed_context_create
:
1181 fw_core_remove_address_handler(&dev
->handler
);
1183 dev
->local_fifo
= FWNET_NO_FIFO_ADDR
;
1189 static int fwnet_open(struct net_device
*net
)
1191 struct fwnet_device
*dev
= netdev_priv(net
);
1194 if (dev
->broadcast_state
== FWNET_BROADCAST_ERROR
) {
1195 ret
= fwnet_broadcast_start(dev
);
1199 netif_start_queue(net
);
1205 static int fwnet_stop(struct net_device
*net
)
1207 netif_stop_queue(net
);
1209 /* Deallocate iso context for use by other applications? */
1214 static netdev_tx_t
fwnet_tx(struct sk_buff
*skb
, struct net_device
*net
)
1216 struct fwnet_header hdr_buf
;
1217 struct fwnet_device
*dev
= netdev_priv(net
);
1220 unsigned max_payload
;
1222 u16
*datagram_label_ptr
;
1223 struct fwnet_packet_task
*ptask
;
1224 struct fwnet_peer
*peer
;
1225 unsigned long flags
;
1227 ptask
= kmem_cache_alloc(fwnet_packet_task_cache
, GFP_ATOMIC
);
1231 skb
= skb_share_check(skb
, GFP_ATOMIC
);
1236 * Make a copy of the driver-specific header.
1237 * We might need to rebuild the header on tx failure.
1239 memcpy(&hdr_buf
, skb
->data
, sizeof(hdr_buf
));
1240 skb_pull(skb
, sizeof(hdr_buf
));
1242 proto
= hdr_buf
.h_proto
;
1245 /* serialize access to peer, including peer->datagram_label */
1246 spin_lock_irqsave(&dev
->lock
, flags
);
1249 * Set the transmission type for the packet. ARP packets and IP
1250 * broadcast packets are sent via GASP.
1252 if (memcmp(hdr_buf
.h_dest
, net
->broadcast
, FWNET_ALEN
) == 0
1253 || proto
== htons(ETH_P_ARP
)
1254 || (proto
== htons(ETH_P_IP
)
1255 && IN_MULTICAST(ntohl(ip_hdr(skb
)->daddr
)))) {
1256 max_payload
= dev
->broadcast_xmt_max_payload
;
1257 datagram_label_ptr
= &dev
->broadcast_xmt_datagramlabel
;
1259 ptask
->fifo_addr
= FWNET_NO_FIFO_ADDR
;
1260 ptask
->generation
= 0;
1261 ptask
->dest_node
= IEEE1394_ALL_NODES
;
1262 ptask
->speed
= SCODE_100
;
1264 __be64 guid
= get_unaligned((__be64
*)hdr_buf
.h_dest
);
1267 peer
= fwnet_peer_find_by_guid(dev
, be64_to_cpu(guid
));
1268 if (!peer
|| peer
->fifo
== FWNET_NO_FIFO_ADDR
)
1271 generation
= peer
->generation
;
1272 dest_node
= peer
->node_id
;
1273 max_payload
= peer
->max_payload
;
1274 datagram_label_ptr
= &peer
->datagram_label
;
1276 ptask
->fifo_addr
= peer
->fifo
;
1277 ptask
->generation
= generation
;
1278 ptask
->dest_node
= dest_node
;
1279 ptask
->speed
= peer
->speed
;
1282 /* If this is an ARP packet, convert it */
1283 if (proto
== htons(ETH_P_ARP
)) {
1284 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
1285 unsigned char *arp_ptr
= (unsigned char *)(arp
+ 1);
1286 struct rfc2734_arp
*arp1394
= (struct rfc2734_arp
*)skb
->data
;
1289 ipaddr
= get_unaligned((__be32
*)(arp_ptr
+ FWNET_ALEN
));
1291 arp1394
->hw_addr_len
= RFC2734_HW_ADDR_LEN
;
1292 arp1394
->max_rec
= dev
->card
->max_receive
;
1293 arp1394
->sspd
= dev
->card
->link_speed
;
1295 put_unaligned_be16(dev
->local_fifo
>> 32,
1297 put_unaligned_be32(dev
->local_fifo
& 0xffffffff,
1299 put_unaligned(ipaddr
, &arp1394
->sip
);
1307 /* Does it all fit in one packet? */
1308 if (dg_size
<= max_payload
) {
1309 fwnet_make_uf_hdr(&ptask
->hdr
, ntohs(proto
));
1310 ptask
->outstanding_pkts
= 1;
1311 max_payload
= dg_size
+ RFC2374_UNFRAG_HDR_SIZE
;
1315 max_payload
-= RFC2374_FRAG_OVERHEAD
;
1316 datagram_label
= (*datagram_label_ptr
)++;
1317 fwnet_make_ff_hdr(&ptask
->hdr
, ntohs(proto
), dg_size
,
1319 ptask
->outstanding_pkts
= DIV_ROUND_UP(dg_size
, max_payload
);
1320 max_payload
+= RFC2374_FRAG_HDR_SIZE
;
1323 spin_unlock_irqrestore(&dev
->lock
, flags
);
1325 ptask
->max_payload
= max_payload
;
1326 INIT_LIST_HEAD(&ptask
->pt_link
);
1328 fwnet_send_packet(ptask
);
1330 return NETDEV_TX_OK
;
1333 spin_unlock_irqrestore(&dev
->lock
, flags
);
1336 kmem_cache_free(fwnet_packet_task_cache
, ptask
);
1341 net
->stats
.tx_dropped
++;
1342 net
->stats
.tx_errors
++;
1345 * FIXME: According to a patch from 2003-02-26, "returning non-zero
1346 * causes serious problems" here, allegedly. Before that patch,
1347 * -ERRNO was returned which is not appropriate under Linux 2.6.
1348 * Perhaps more needs to be done? Stop the queue in serious
1349 * conditions and restart it elsewhere?
1351 return NETDEV_TX_OK
;
1354 static int fwnet_change_mtu(struct net_device
*net
, int new_mtu
)
1363 static const struct net_device_ops fwnet_netdev_ops
= {
1364 .ndo_open
= fwnet_open
,
1365 .ndo_stop
= fwnet_stop
,
1366 .ndo_start_xmit
= fwnet_tx
,
1367 .ndo_change_mtu
= fwnet_change_mtu
,
1370 static void fwnet_init_dev(struct net_device
*net
)
1372 net
->header_ops
= &fwnet_header_ops
;
1373 net
->netdev_ops
= &fwnet_netdev_ops
;
1374 net
->watchdog_timeo
= 2 * HZ
;
1375 net
->flags
= IFF_BROADCAST
| IFF_MULTICAST
;
1376 net
->features
= NETIF_F_HIGHDMA
;
1377 net
->addr_len
= FWNET_ALEN
;
1378 net
->hard_header_len
= FWNET_HLEN
;
1379 net
->type
= ARPHRD_IEEE1394
;
1380 net
->tx_queue_len
= 10;
1383 /* caller must hold fwnet_device_mutex */
1384 static struct fwnet_device
*fwnet_dev_find(struct fw_card
*card
)
1386 struct fwnet_device
*dev
;
1388 list_for_each_entry(dev
, &fwnet_device_list
, dev_link
)
1389 if (dev
->card
== card
)
1395 static int fwnet_add_peer(struct fwnet_device
*dev
,
1396 struct fw_unit
*unit
, struct fw_device
*device
)
1398 struct fwnet_peer
*peer
;
1400 peer
= kmalloc(sizeof(*peer
), GFP_KERNEL
);
1404 dev_set_drvdata(&unit
->device
, peer
);
1407 peer
->guid
= (u64
)device
->config_rom
[3] << 32 | device
->config_rom
[4];
1408 peer
->fifo
= FWNET_NO_FIFO_ADDR
;
1409 INIT_LIST_HEAD(&peer
->pd_list
);
1411 peer
->datagram_label
= 0;
1412 peer
->speed
= device
->max_speed
;
1413 peer
->max_payload
= fwnet_max_payload(device
->max_rec
, peer
->speed
);
1415 peer
->generation
= device
->generation
;
1417 peer
->node_id
= device
->node_id
;
1419 spin_lock_irq(&dev
->lock
);
1420 list_add_tail(&peer
->peer_link
, &dev
->peer_list
);
1421 spin_unlock_irq(&dev
->lock
);
1426 static int fwnet_probe(struct device
*_dev
)
1428 struct fw_unit
*unit
= fw_unit(_dev
);
1429 struct fw_device
*device
= fw_parent_device(unit
);
1430 struct fw_card
*card
= device
->card
;
1431 struct net_device
*net
;
1432 bool allocated_netdev
= false;
1433 struct fwnet_device
*dev
;
1437 mutex_lock(&fwnet_device_mutex
);
1439 dev
= fwnet_dev_find(card
);
1445 net
= alloc_netdev(sizeof(*dev
), "firewire%d", fwnet_init_dev
);
1451 allocated_netdev
= true;
1452 SET_NETDEV_DEV(net
, card
->device
);
1453 dev
= netdev_priv(net
);
1455 spin_lock_init(&dev
->lock
);
1456 dev
->broadcast_state
= FWNET_BROADCAST_ERROR
;
1457 dev
->broadcast_rcv_context
= NULL
;
1458 dev
->broadcast_xmt_max_payload
= 0;
1459 dev
->broadcast_xmt_datagramlabel
= 0;
1461 dev
->local_fifo
= FWNET_NO_FIFO_ADDR
;
1463 INIT_LIST_HEAD(&dev
->packet_list
);
1464 INIT_LIST_HEAD(&dev
->broadcasted_list
);
1465 INIT_LIST_HEAD(&dev
->sent_list
);
1466 INIT_LIST_HEAD(&dev
->peer_list
);
1472 * Use the RFC 2734 default 1500 octets or the maximum payload
1475 max_mtu
= (1 << (card
->max_receive
+ 1))
1476 - sizeof(struct rfc2734_header
) - IEEE1394_GASP_HDR_SIZE
;
1477 net
->mtu
= min(1500U, max_mtu
);
1479 /* Set our hardware address while we're at it */
1480 put_unaligned_be64(card
->guid
, net
->dev_addr
);
1481 put_unaligned_be64(~0ULL, net
->broadcast
);
1482 ret
= register_netdev(net
);
1484 fw_error("Cannot register the driver\n");
1488 list_add_tail(&dev
->dev_link
, &fwnet_device_list
);
1489 fw_notify("%s: IPv4 over FireWire on device %016llx\n",
1490 net
->name
, (unsigned long long)card
->guid
);
1492 ret
= fwnet_add_peer(dev
, unit
, device
);
1493 if (ret
&& allocated_netdev
) {
1494 unregister_netdev(net
);
1495 list_del(&dev
->dev_link
);
1498 if (ret
&& allocated_netdev
)
1501 mutex_unlock(&fwnet_device_mutex
);
1506 static void fwnet_remove_peer(struct fwnet_peer
*peer
)
1508 struct fwnet_partial_datagram
*pd
, *pd_next
;
1510 spin_lock_irq(&peer
->dev
->lock
);
1511 list_del(&peer
->peer_link
);
1512 spin_unlock_irq(&peer
->dev
->lock
);
1514 list_for_each_entry_safe(pd
, pd_next
, &peer
->pd_list
, pd_link
)
1515 fwnet_pd_delete(pd
);
1520 static int fwnet_remove(struct device
*_dev
)
1522 struct fwnet_peer
*peer
= dev_get_drvdata(_dev
);
1523 struct fwnet_device
*dev
= peer
->dev
;
1524 struct net_device
*net
;
1525 struct fwnet_packet_task
*ptask
, *pt_next
;
1527 mutex_lock(&fwnet_device_mutex
);
1529 fwnet_remove_peer(peer
);
1531 if (list_empty(&dev
->peer_list
)) {
1533 unregister_netdev(net
);
1535 if (dev
->local_fifo
!= FWNET_NO_FIFO_ADDR
)
1536 fw_core_remove_address_handler(&dev
->handler
);
1537 if (dev
->broadcast_rcv_context
) {
1538 fw_iso_context_stop(dev
->broadcast_rcv_context
);
1539 fw_iso_buffer_destroy(&dev
->broadcast_rcv_buffer
,
1541 fw_iso_context_destroy(dev
->broadcast_rcv_context
);
1543 list_for_each_entry_safe(ptask
, pt_next
,
1544 &dev
->packet_list
, pt_link
) {
1545 dev_kfree_skb_any(ptask
->skb
);
1546 kmem_cache_free(fwnet_packet_task_cache
, ptask
);
1548 list_for_each_entry_safe(ptask
, pt_next
,
1549 &dev
->broadcasted_list
, pt_link
) {
1550 dev_kfree_skb_any(ptask
->skb
);
1551 kmem_cache_free(fwnet_packet_task_cache
, ptask
);
1553 list_for_each_entry_safe(ptask
, pt_next
,
1554 &dev
->sent_list
, pt_link
) {
1555 dev_kfree_skb_any(ptask
->skb
);
1556 kmem_cache_free(fwnet_packet_task_cache
, ptask
);
1558 list_del(&dev
->dev_link
);
1563 mutex_unlock(&fwnet_device_mutex
);
1569 * FIXME abort partially sent fragmented datagrams,
1570 * discard partially received fragmented datagrams
1572 static void fwnet_update(struct fw_unit
*unit
)
1574 struct fw_device
*device
= fw_parent_device(unit
);
1575 struct fwnet_peer
*peer
= dev_get_drvdata(&unit
->device
);
1578 generation
= device
->generation
;
1580 spin_lock_irq(&peer
->dev
->lock
);
1581 peer
->node_id
= device
->node_id
;
1582 peer
->generation
= generation
;
1583 spin_unlock_irq(&peer
->dev
->lock
);
1586 static const struct ieee1394_device_id fwnet_id_table
[] = {
1588 .match_flags
= IEEE1394_MATCH_SPECIFIER_ID
|
1589 IEEE1394_MATCH_VERSION
,
1590 .specifier_id
= IANA_SPECIFIER_ID
,
1591 .version
= RFC2734_SW_VERSION
,
1596 static struct fw_driver fwnet_driver
= {
1598 .owner
= THIS_MODULE
,
1600 .bus
= &fw_bus_type
,
1601 .probe
= fwnet_probe
,
1602 .remove
= fwnet_remove
,
1604 .update
= fwnet_update
,
1605 .id_table
= fwnet_id_table
,
1608 static const u32 rfc2374_unit_directory_data
[] = {
1609 0x00040000, /* directory_length */
1610 0x1200005e, /* unit_specifier_id: IANA */
1611 0x81000003, /* textual descriptor offset */
1612 0x13000001, /* unit_sw_version: RFC 2734 */
1613 0x81000005, /* textual descriptor offset */
1614 0x00030000, /* descriptor_length */
1615 0x00000000, /* text */
1616 0x00000000, /* minimal ASCII, en */
1617 0x49414e41, /* I A N A */
1618 0x00030000, /* descriptor_length */
1619 0x00000000, /* text */
1620 0x00000000, /* minimal ASCII, en */
1621 0x49507634, /* I P v 4 */
1624 static struct fw_descriptor rfc2374_unit_directory
= {
1625 .length
= ARRAY_SIZE(rfc2374_unit_directory_data
),
1626 .key
= (CSR_DIRECTORY
| CSR_UNIT
) << 24,
1627 .data
= rfc2374_unit_directory_data
1630 static int __init
fwnet_init(void)
1634 err
= fw_core_add_descriptor(&rfc2374_unit_directory
);
1638 fwnet_packet_task_cache
= kmem_cache_create("packet_task",
1639 sizeof(struct fwnet_packet_task
), 0, 0, NULL
);
1640 if (!fwnet_packet_task_cache
) {
1645 err
= driver_register(&fwnet_driver
.driver
);
1649 kmem_cache_destroy(fwnet_packet_task_cache
);
1651 fw_core_remove_descriptor(&rfc2374_unit_directory
);
1655 module_init(fwnet_init
);
1657 static void __exit
fwnet_cleanup(void)
1659 driver_unregister(&fwnet_driver
.driver
);
1660 kmem_cache_destroy(fwnet_packet_task_cache
);
1661 fw_core_remove_descriptor(&rfc2374_unit_directory
);
1663 module_exit(fwnet_cleanup
);
1665 MODULE_AUTHOR("Jay Fenlason <fenlason@redhat.com>");
1666 MODULE_DESCRIPTION("IPv4 over IEEE1394 as per RFC 2734");
1667 MODULE_LICENSE("GPL");
1668 MODULE_DEVICE_TABLE(ieee1394
, fwnet_id_table
);