2 * eth1394.c -- IPv4 driver for Linux IEEE-1394 Subsystem
4 * Copyright (C) 2001-2003 Ben Collins <bcollins@debian.org>
5 * 2000 Bonin Franck <boninf@free.fr>
6 * 2003 Steve Kinneberg <kinnebergsteve@acmsystems.com>
8 * Mainly based on work by Emanuel Pirker and Andreas E. Bombe
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software Foundation,
22 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 * This driver intends to support RFC 2734, which describes a method for
27 * transporting IPv4 datagrams over IEEE-1394 serial busses.
31 * - Add MCAP. Limited Multicast exists only to 224.0.0.1 and 224.0.0.2.
33 * Non-RFC 2734 related:
34 * - Handle fragmented skb's coming from the networking layer.
35 * - Move generic GASP reception to core 1394 code
36 * - Convert kmalloc/kfree for link fragments to use kmem_cache_* instead
37 * - Stability improvements
38 * - Performance enhancements
39 * - Consider garbage collecting old partial datagrams after X amount of time
42 #include <linux/module.h>
44 #include <linux/kernel.h>
45 #include <linux/slab.h>
46 #include <linux/errno.h>
47 #include <linux/types.h>
48 #include <linux/delay.h>
49 #include <linux/init.h>
50 #include <linux/workqueue.h>
52 #include <linux/netdevice.h>
53 #include <linux/inetdevice.h>
54 #include <linux/if_arp.h>
55 #include <linux/if_ether.h>
58 #include <linux/tcp.h>
59 #include <linux/skbuff.h>
60 #include <linux/bitops.h>
61 #include <asm/uaccess.h>
62 #include <asm/delay.h>
63 #include <asm/unaligned.h>
66 #include "config_roms.h"
69 #include "highlevel.h"
71 #include "ieee1394_core.h"
72 #include "ieee1394_hotplug.h"
73 #include "ieee1394_transactions.h"
74 #include "ieee1394_types.h"
78 #define ETH1394_PRINT_G(level, fmt, args...) \
79 printk(level "%s: " fmt, driver_name, ## args)
81 #define ETH1394_PRINT(level, dev_name, fmt, args...) \
82 printk(level "%s: %s: " fmt, driver_name, dev_name, ## args)
84 struct fragment_info
{
85 struct list_head list
;
90 struct partial_datagram
{
91 struct list_head list
;
97 struct list_head frag_info
;
101 struct list_head list
; /* partial datagram list per node */
102 unsigned int sz
; /* partial datagram list size per node */
103 spinlock_t lock
; /* partial datagram lock */
106 struct eth1394_host_info
{
107 struct hpsb_host
*host
;
108 struct net_device
*dev
;
111 struct eth1394_node_ref
{
112 struct unit_directory
*ud
;
113 struct list_head list
;
116 struct eth1394_node_info
{
117 u16 maxpayload
; /* max payload */
118 u8 sspd
; /* max speed */
119 u64 fifo
; /* FIFO address */
120 struct pdg_list pdg
; /* partial RX datagram lists */
121 int dgl
; /* outgoing datagram label */
124 static const char driver_name
[] = "eth1394";
126 static struct kmem_cache
*packet_task_cache
;
128 static struct hpsb_highlevel eth1394_highlevel
;
130 /* Use common.lf to determine header len */
131 static const int hdr_type_len
[] = {
132 sizeof(struct eth1394_uf_hdr
),
133 sizeof(struct eth1394_ff_hdr
),
134 sizeof(struct eth1394_sf_hdr
),
135 sizeof(struct eth1394_sf_hdr
)
138 static const u16 eth1394_speedto_maxpayload
[] = {
139 /* S100, S200, S400, S800, S1600, S3200 */
140 512, 1024, 2048, 4096, 4096, 4096
143 MODULE_AUTHOR("Ben Collins (bcollins@debian.org)");
144 MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)");
145 MODULE_LICENSE("GPL");
148 * The max_partial_datagrams parameter is the maximum number of fragmented
149 * datagrams per node that eth1394 will keep in memory. Providing an upper
150 * bound allows us to limit the amount of memory that partial datagrams
151 * consume in the event that some partial datagrams are never completed.
153 static int max_partial_datagrams
= 25;
154 module_param(max_partial_datagrams
, int, S_IRUGO
| S_IWUSR
);
155 MODULE_PARM_DESC(max_partial_datagrams
,
156 "Maximum number of partially received fragmented datagrams "
160 static int ether1394_header(struct sk_buff
*skb
, struct net_device
*dev
,
161 unsigned short type
, const void *daddr
,
162 const void *saddr
, unsigned len
);
163 static int ether1394_rebuild_header(struct sk_buff
*skb
);
164 static int ether1394_header_parse(const struct sk_buff
*skb
,
165 unsigned char *haddr
);
166 static int ether1394_header_cache(const struct neighbour
*neigh
,
167 struct hh_cache
*hh
);
168 static void ether1394_header_cache_update(struct hh_cache
*hh
,
169 const struct net_device
*dev
,
170 const unsigned char *haddr
);
171 static netdev_tx_t
ether1394_tx(struct sk_buff
*skb
,
172 struct net_device
*dev
);
173 static void ether1394_iso(struct hpsb_iso
*iso
);
175 static int ether1394_write(struct hpsb_host
*host
, int srcid
, int destid
,
176 quadlet_t
*data
, u64 addr
, size_t len
, u16 flags
);
177 static void ether1394_add_host(struct hpsb_host
*host
);
178 static void ether1394_remove_host(struct hpsb_host
*host
);
179 static void ether1394_host_reset(struct hpsb_host
*host
);
181 /* Function for incoming 1394 packets */
182 static const struct hpsb_address_ops addr_ops
= {
183 .write
= ether1394_write
,
186 /* Ieee1394 highlevel driver functions */
187 static struct hpsb_highlevel eth1394_highlevel
= {
189 .add_host
= ether1394_add_host
,
190 .remove_host
= ether1394_remove_host
,
191 .host_reset
= ether1394_host_reset
,
194 static int ether1394_recv_init(struct eth1394_priv
*priv
)
196 unsigned int iso_buf_size
;
198 /* FIXME: rawiso limits us to PAGE_SIZE */
199 iso_buf_size
= min((unsigned int)PAGE_SIZE
,
200 2 * (1U << (priv
->host
->csr
.max_rec
+ 1)));
202 priv
->iso
= hpsb_iso_recv_init(priv
->host
,
203 ETHER1394_GASP_BUFFERS
* iso_buf_size
,
204 ETHER1394_GASP_BUFFERS
,
205 priv
->broadcast_channel
,
206 HPSB_ISO_DMA_PACKET_PER_BUFFER
,
208 if (priv
->iso
== NULL
) {
209 ETH1394_PRINT_G(KERN_ERR
, "Failed to allocate IR context\n");
210 priv
->bc_state
= ETHER1394_BC_ERROR
;
214 if (hpsb_iso_recv_start(priv
->iso
, -1, (1 << 3), -1) < 0)
215 priv
->bc_state
= ETHER1394_BC_STOPPED
;
217 priv
->bc_state
= ETHER1394_BC_RUNNING
;
221 /* This is called after an "ifup" */
222 static int ether1394_open(struct net_device
*dev
)
224 struct eth1394_priv
*priv
= netdev_priv(dev
);
227 if (priv
->bc_state
== ETHER1394_BC_ERROR
) {
228 ret
= ether1394_recv_init(priv
);
232 netif_start_queue(dev
);
236 /* This is called after an "ifdown" */
237 static int ether1394_stop(struct net_device
*dev
)
239 /* flush priv->wake */
240 flush_scheduled_work();
242 netif_stop_queue(dev
);
246 /* FIXME: What to do if we timeout? I think a host reset is probably in order,
247 * so that's what we do. Should we increment the stat counters too? */
248 static void ether1394_tx_timeout(struct net_device
*dev
)
250 struct hpsb_host
*host
=
251 ((struct eth1394_priv
*)netdev_priv(dev
))->host
;
253 ETH1394_PRINT(KERN_ERR
, dev
->name
, "Timeout, resetting host\n");
254 ether1394_host_reset(host
);
257 static inline int ether1394_max_mtu(struct hpsb_host
* host
)
259 return (1 << (host
->csr
.max_rec
+ 1))
260 - sizeof(union eth1394_hdr
) - ETHER1394_GASP_OVERHEAD
;
263 static int ether1394_change_mtu(struct net_device
*dev
, int new_mtu
)
270 max_mtu
= ether1394_max_mtu(
271 ((struct eth1394_priv
*)netdev_priv(dev
))->host
);
272 if (new_mtu
> max_mtu
) {
273 ETH1394_PRINT(KERN_INFO
, dev
->name
,
274 "Local node constrains MTU to %d\n", max_mtu
);
282 static void purge_partial_datagram(struct list_head
*old
)
284 struct partial_datagram
*pd
;
285 struct list_head
*lh
, *n
;
286 struct fragment_info
*fi
;
288 pd
= list_entry(old
, struct partial_datagram
, list
);
290 list_for_each_safe(lh
, n
, &pd
->frag_info
) {
291 fi
= list_entry(lh
, struct fragment_info
, list
);
300 /******************************************
301 * 1394 bus activity functions
302 ******************************************/
304 static struct eth1394_node_ref
*eth1394_find_node(struct list_head
*inl
,
305 struct unit_directory
*ud
)
307 struct eth1394_node_ref
*node
;
309 list_for_each_entry(node
, inl
, list
)
316 static struct eth1394_node_ref
*eth1394_find_node_guid(struct list_head
*inl
,
319 struct eth1394_node_ref
*node
;
321 list_for_each_entry(node
, inl
, list
)
322 if (node
->ud
->ne
->guid
== guid
)
328 static struct eth1394_node_ref
*eth1394_find_node_nodeid(struct list_head
*inl
,
331 struct eth1394_node_ref
*node
;
333 list_for_each_entry(node
, inl
, list
)
334 if (node
->ud
->ne
->nodeid
== nodeid
)
340 static int eth1394_new_node(struct eth1394_host_info
*hi
,
341 struct unit_directory
*ud
)
343 struct eth1394_priv
*priv
;
344 struct eth1394_node_ref
*new_node
;
345 struct eth1394_node_info
*node_info
;
347 new_node
= kmalloc(sizeof(*new_node
), GFP_KERNEL
);
351 node_info
= kmalloc(sizeof(*node_info
), GFP_KERNEL
);
357 spin_lock_init(&node_info
->pdg
.lock
);
358 INIT_LIST_HEAD(&node_info
->pdg
.list
);
359 node_info
->pdg
.sz
= 0;
360 node_info
->fifo
= CSR1212_INVALID_ADDR_SPACE
;
362 dev_set_drvdata(&ud
->device
, node_info
);
365 priv
= netdev_priv(hi
->dev
);
366 list_add_tail(&new_node
->list
, &priv
->ip_node_list
);
370 static int eth1394_probe(struct device
*dev
)
372 struct unit_directory
*ud
;
373 struct eth1394_host_info
*hi
;
375 ud
= container_of(dev
, struct unit_directory
, device
);
376 hi
= hpsb_get_hostinfo(ð1394_highlevel
, ud
->ne
->host
);
380 return eth1394_new_node(hi
, ud
);
383 static int eth1394_remove(struct device
*dev
)
385 struct unit_directory
*ud
;
386 struct eth1394_host_info
*hi
;
387 struct eth1394_priv
*priv
;
388 struct eth1394_node_ref
*old_node
;
389 struct eth1394_node_info
*node_info
;
390 struct list_head
*lh
, *n
;
393 ud
= container_of(dev
, struct unit_directory
, device
);
394 hi
= hpsb_get_hostinfo(ð1394_highlevel
, ud
->ne
->host
);
398 priv
= netdev_priv(hi
->dev
);
400 old_node
= eth1394_find_node(&priv
->ip_node_list
, ud
);
404 list_del(&old_node
->list
);
407 node_info
= dev_get_drvdata(&ud
->device
);
409 spin_lock_irqsave(&node_info
->pdg
.lock
, flags
);
410 /* The partial datagram list should be empty, but we'll just
411 * make sure anyway... */
412 list_for_each_safe(lh
, n
, &node_info
->pdg
.list
)
413 purge_partial_datagram(lh
);
414 spin_unlock_irqrestore(&node_info
->pdg
.lock
, flags
);
417 dev_set_drvdata(&ud
->device
, NULL
);
421 static int eth1394_update(struct unit_directory
*ud
)
423 struct eth1394_host_info
*hi
;
424 struct eth1394_priv
*priv
;
425 struct eth1394_node_ref
*node
;
427 hi
= hpsb_get_hostinfo(ð1394_highlevel
, ud
->ne
->host
);
431 priv
= netdev_priv(hi
->dev
);
432 node
= eth1394_find_node(&priv
->ip_node_list
, ud
);
436 return eth1394_new_node(hi
, ud
);
439 static const struct ieee1394_device_id eth1394_id_table
[] = {
441 .match_flags
= (IEEE1394_MATCH_SPECIFIER_ID
|
442 IEEE1394_MATCH_VERSION
),
443 .specifier_id
= ETHER1394_GASP_SPECIFIER_ID
,
444 .version
= ETHER1394_GASP_VERSION
,
449 MODULE_DEVICE_TABLE(ieee1394
, eth1394_id_table
);
451 static struct hpsb_protocol_driver eth1394_proto_driver
= {
453 .id_table
= eth1394_id_table
,
454 .update
= eth1394_update
,
456 .probe
= eth1394_probe
,
457 .remove
= eth1394_remove
,
461 static void ether1394_reset_priv(struct net_device
*dev
, int set_mtu
)
465 struct eth1394_priv
*priv
= netdev_priv(dev
);
466 struct hpsb_host
*host
= priv
->host
;
467 u64 guid
= get_unaligned((u64
*)&(host
->csr
.rom
->bus_info_data
[3]));
468 int max_speed
= IEEE1394_SPEED_MAX
;
470 spin_lock_irqsave(&priv
->lock
, flags
);
472 memset(priv
->ud_list
, 0, sizeof(priv
->ud_list
));
473 priv
->bc_maxpayload
= 512;
475 /* Determine speed limit */
476 /* FIXME: This is broken for nodes with link speed < PHY speed,
477 * and it is suboptimal for S200B...S800B hardware.
478 * The result of nodemgr's speed probe should be used somehow. */
479 for (i
= 0; i
< host
->node_count
; i
++) {
480 /* take care of S100B...S400B PHY ports */
481 if (host
->speed
[i
] == SELFID_SPEED_UNKNOWN
) {
482 max_speed
= IEEE1394_SPEED_100
;
485 if (max_speed
> host
->speed
[i
])
486 max_speed
= host
->speed
[i
];
488 priv
->bc_sspd
= max_speed
;
491 /* Use the RFC 2734 default 1500 octets or the maximum payload
493 dev
->mtu
= min(1500, ether1394_max_mtu(host
));
495 /* Set our hardware address while we're at it */
496 memcpy(dev
->dev_addr
, &guid
, sizeof(u64
));
497 memset(dev
->broadcast
, 0xff, sizeof(u64
));
500 spin_unlock_irqrestore(&priv
->lock
, flags
);
503 static const struct header_ops ether1394_header_ops
= {
504 .create
= ether1394_header
,
505 .rebuild
= ether1394_rebuild_header
,
506 .cache
= ether1394_header_cache
,
507 .cache_update
= ether1394_header_cache_update
,
508 .parse
= ether1394_header_parse
,
511 static const struct net_device_ops ether1394_netdev_ops
= {
512 .ndo_open
= ether1394_open
,
513 .ndo_stop
= ether1394_stop
,
514 .ndo_start_xmit
= ether1394_tx
,
515 .ndo_tx_timeout
= ether1394_tx_timeout
,
516 .ndo_change_mtu
= ether1394_change_mtu
,
519 static void ether1394_init_dev(struct net_device
*dev
)
522 dev
->header_ops
= ðer1394_header_ops
;
523 dev
->netdev_ops
= ðer1394_netdev_ops
;
525 dev
->watchdog_timeo
= ETHER1394_TIMEOUT
;
526 dev
->flags
= IFF_BROADCAST
| IFF_MULTICAST
;
527 dev
->features
= NETIF_F_HIGHDMA
;
528 dev
->addr_len
= ETH1394_ALEN
;
529 dev
->hard_header_len
= ETH1394_HLEN
;
530 dev
->type
= ARPHRD_IEEE1394
;
532 /* FIXME: This value was copied from ether_setup(). Is it too much? */
533 dev
->tx_queue_len
= 1000;
537 * Wake the queue up after commonly encountered transmit failure conditions are
538 * hopefully over. Currently only tlabel exhaustion is accounted for.
540 static void ether1394_wake_queue(struct work_struct
*work
)
542 struct eth1394_priv
*priv
;
543 struct hpsb_packet
*packet
;
545 priv
= container_of(work
, struct eth1394_priv
, wake
);
546 packet
= hpsb_alloc_packet(0);
548 /* This is really bad, but unjam the queue anyway. */
552 packet
->host
= priv
->host
;
553 packet
->node_id
= priv
->wake_node
;
555 * A transaction label is all we really want. If we get one, it almost
556 * always means we can get a lot more because the ieee1394 core recycled
557 * a whole batch of tlabels, at last.
559 if (hpsb_get_tlabel(packet
) == 0)
560 hpsb_free_tlabel(packet
);
562 hpsb_free_packet(packet
);
564 netif_wake_queue(priv
->wake_dev
);
568 * This function is called every time a card is found. It is generally called
569 * when the module is installed. This is where we add all of our ethernet
570 * devices. One for each host.
572 static void ether1394_add_host(struct hpsb_host
*host
)
574 struct eth1394_host_info
*hi
= NULL
;
575 struct net_device
*dev
= NULL
;
576 struct eth1394_priv
*priv
;
579 if (hpsb_config_rom_ip1394_add(host
) != 0) {
580 ETH1394_PRINT_G(KERN_ERR
, "Can't add IP-over-1394 ROM entry\n");
584 fifo_addr
= hpsb_allocate_and_register_addrspace(
585 ð1394_highlevel
, host
, &addr_ops
,
586 ETHER1394_REGION_ADDR_LEN
, ETHER1394_REGION_ADDR_LEN
,
587 CSR1212_INVALID_ADDR_SPACE
, CSR1212_INVALID_ADDR_SPACE
);
588 if (fifo_addr
== CSR1212_INVALID_ADDR_SPACE
) {
589 ETH1394_PRINT_G(KERN_ERR
, "Cannot register CSR space\n");
590 hpsb_config_rom_ip1394_remove(host
);
594 dev
= alloc_netdev(sizeof(*priv
), "eth%d", ether1394_init_dev
);
596 ETH1394_PRINT_G(KERN_ERR
, "Out of memory\n");
600 SET_NETDEV_DEV(dev
, &host
->device
);
602 priv
= netdev_priv(dev
);
603 INIT_LIST_HEAD(&priv
->ip_node_list
);
604 spin_lock_init(&priv
->lock
);
606 priv
->local_fifo
= fifo_addr
;
607 INIT_WORK(&priv
->wake
, ether1394_wake_queue
);
608 priv
->wake_dev
= dev
;
610 hi
= hpsb_create_hostinfo(ð1394_highlevel
, host
, sizeof(*hi
));
612 ETH1394_PRINT_G(KERN_ERR
, "Out of memory\n");
616 ether1394_reset_priv(dev
, 1);
618 if (register_netdev(dev
)) {
619 ETH1394_PRINT_G(KERN_ERR
, "Cannot register the driver\n");
623 ETH1394_PRINT(KERN_INFO
, dev
->name
, "IPv4 over IEEE 1394 (fw-host%d)\n",
629 /* Ignore validity in hopes that it will be set in the future. It'll
630 * be checked when the eth device is opened. */
631 priv
->broadcast_channel
= host
->csr
.broadcast_channel
& 0x3f;
633 ether1394_recv_init(priv
);
639 hpsb_destroy_hostinfo(ð1394_highlevel
, host
);
640 hpsb_unregister_addrspace(ð1394_highlevel
, host
, fifo_addr
);
641 hpsb_config_rom_ip1394_remove(host
);
644 /* Remove a card from our list */
645 static void ether1394_remove_host(struct hpsb_host
*host
)
647 struct eth1394_host_info
*hi
;
648 struct eth1394_priv
*priv
;
650 hi
= hpsb_get_hostinfo(ð1394_highlevel
, host
);
653 priv
= netdev_priv(hi
->dev
);
654 hpsb_unregister_addrspace(ð1394_highlevel
, host
, priv
->local_fifo
);
655 hpsb_config_rom_ip1394_remove(host
);
657 hpsb_iso_shutdown(priv
->iso
);
658 unregister_netdev(hi
->dev
);
659 free_netdev(hi
->dev
);
662 /* A bus reset happened */
663 static void ether1394_host_reset(struct hpsb_host
*host
)
665 struct eth1394_host_info
*hi
;
666 struct eth1394_priv
*priv
;
667 struct net_device
*dev
;
668 struct list_head
*lh
, *n
;
669 struct eth1394_node_ref
*node
;
670 struct eth1394_node_info
*node_info
;
673 hi
= hpsb_get_hostinfo(ð1394_highlevel
, host
);
675 /* This can happen for hosts that we don't use */
680 priv
= netdev_priv(dev
);
682 /* Reset our private host data, but not our MTU */
683 netif_stop_queue(dev
);
684 ether1394_reset_priv(dev
, 0);
686 list_for_each_entry(node
, &priv
->ip_node_list
, list
) {
687 node_info
= dev_get_drvdata(&node
->ud
->device
);
689 spin_lock_irqsave(&node_info
->pdg
.lock
, flags
);
691 list_for_each_safe(lh
, n
, &node_info
->pdg
.list
)
692 purge_partial_datagram(lh
);
694 INIT_LIST_HEAD(&(node_info
->pdg
.list
));
695 node_info
->pdg
.sz
= 0;
697 spin_unlock_irqrestore(&node_info
->pdg
.lock
, flags
);
700 netif_wake_queue(dev
);
703 /******************************************
704 * HW Header net device functions
705 ******************************************/
706 /* These functions have been adapted from net/ethernet/eth.c */
708 /* Create a fake MAC header for an arbitrary protocol layer.
709 * saddr=NULL means use device source address
710 * daddr=NULL means leave destination address (eg unresolved arp). */
711 static int ether1394_header(struct sk_buff
*skb
, struct net_device
*dev
,
712 unsigned short type
, const void *daddr
,
713 const void *saddr
, unsigned len
)
715 struct eth1394hdr
*eth
=
716 (struct eth1394hdr
*)skb_push(skb
, ETH1394_HLEN
);
718 eth
->h_proto
= htons(type
);
720 if (dev
->flags
& (IFF_LOOPBACK
| IFF_NOARP
)) {
721 memset(eth
->h_dest
, 0, dev
->addr_len
);
722 return dev
->hard_header_len
;
726 memcpy(eth
->h_dest
, daddr
, dev
->addr_len
);
727 return dev
->hard_header_len
;
730 return -dev
->hard_header_len
;
733 /* Rebuild the faked MAC header. This is called after an ARP
734 * (or in future other address resolution) has completed on this
735 * sk_buff. We now let ARP fill in the other fields.
737 * This routine CANNOT use cached dst->neigh!
738 * Really, it is used only when dst->neigh is wrong.
740 static int ether1394_rebuild_header(struct sk_buff
*skb
)
742 struct eth1394hdr
*eth
= (struct eth1394hdr
*)skb
->data
;
744 if (eth
->h_proto
== htons(ETH_P_IP
))
745 return arp_find((unsigned char *)ð
->h_dest
, skb
);
747 ETH1394_PRINT(KERN_DEBUG
, skb
->dev
->name
,
748 "unable to resolve type %04x addresses\n",
749 ntohs(eth
->h_proto
));
753 static int ether1394_header_parse(const struct sk_buff
*skb
,
754 unsigned char *haddr
)
756 memcpy(haddr
, skb
->dev
->dev_addr
, ETH1394_ALEN
);
760 static int ether1394_header_cache(const struct neighbour
*neigh
,
763 __be16 type
= hh
->hh_type
;
764 struct net_device
*dev
= neigh
->dev
;
765 struct eth1394hdr
*eth
=
766 (struct eth1394hdr
*)((u8
*)hh
->hh_data
+ 16 - ETH1394_HLEN
);
768 if (type
== htons(ETH_P_802_3
))
772 memcpy(eth
->h_dest
, neigh
->ha
, dev
->addr_len
);
774 hh
->hh_len
= ETH1394_HLEN
;
778 /* Called by Address Resolution module to notify changes in address. */
779 static void ether1394_header_cache_update(struct hh_cache
*hh
,
780 const struct net_device
*dev
,
781 const unsigned char * haddr
)
783 memcpy((u8
*)hh
->hh_data
+ 16 - ETH1394_HLEN
, haddr
, dev
->addr_len
);
786 /******************************************
787 * Datagram reception code
788 ******************************************/
790 /* Copied from net/ethernet/eth.c */
791 static __be16
ether1394_type_trans(struct sk_buff
*skb
, struct net_device
*dev
)
793 struct eth1394hdr
*eth
;
796 skb_reset_mac_header(skb
);
797 skb_pull(skb
, ETH1394_HLEN
);
798 eth
= eth1394_hdr(skb
);
800 if (*eth
->h_dest
& 1) {
801 if (memcmp(eth
->h_dest
, dev
->broadcast
, dev
->addr_len
) == 0)
802 skb
->pkt_type
= PACKET_BROADCAST
;
805 skb
->pkt_type
= PACKET_MULTICAST
;
808 if (memcmp(eth
->h_dest
, dev
->dev_addr
, dev
->addr_len
))
809 skb
->pkt_type
= PACKET_OTHERHOST
;
812 if (ntohs(eth
->h_proto
) >= 1536)
817 if (*(unsigned short *)rawp
== 0xFFFF)
818 return htons(ETH_P_802_3
);
820 return htons(ETH_P_802_2
);
823 /* Parse an encapsulated IP1394 header into an ethernet frame packet.
824 * We also perform ARP translation here, if need be. */
825 static __be16
ether1394_parse_encap(struct sk_buff
*skb
, struct net_device
*dev
,
826 nodeid_t srcid
, nodeid_t destid
,
829 struct eth1394_priv
*priv
= netdev_priv(dev
);
833 /* Setup our hw addresses. We use these to build the ethernet header. */
834 if (destid
== (LOCAL_BUS
| ALL_NODES
))
835 dest_hw
= ~cpu_to_be64(0); /* broadcast */
837 dest_hw
= cpu_to_be64((u64
)priv
->host
->csr
.guid_hi
<< 32 |
838 priv
->host
->csr
.guid_lo
);
840 /* If this is an ARP packet, convert it. First, we want to make
841 * use of some of the fields, since they tell us a little bit
842 * about the sending machine. */
843 if (ether_type
== htons(ETH_P_ARP
)) {
844 struct eth1394_arp
*arp1394
= (struct eth1394_arp
*)skb
->data
;
845 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
846 unsigned char *arp_ptr
= (unsigned char *)(arp
+ 1);
847 u64 fifo_addr
= (u64
)ntohs(arp1394
->fifo_hi
) << 32 |
848 ntohl(arp1394
->fifo_lo
);
849 u8 max_rec
= min(priv
->host
->csr
.max_rec
,
850 (u8
)(arp1394
->max_rec
));
851 int sspd
= arp1394
->sspd
;
853 struct eth1394_node_ref
*node
;
854 struct eth1394_node_info
*node_info
;
857 /* Sanity check. MacOSX seems to be sending us 131 in this
858 * field (atleast on my Panther G5). Not sure why. */
859 if (sspd
> 5 || sspd
< 0)
862 maxpayload
= min(eth1394_speedto_maxpayload
[sspd
],
863 (u16
)(1 << (max_rec
+ 1)));
865 guid
= get_unaligned(&arp1394
->s_uniq_id
);
866 node
= eth1394_find_node_guid(&priv
->ip_node_list
,
869 return cpu_to_be16(0);
871 node_info
= dev_get_drvdata(&node
->ud
->device
);
873 /* Update our speed/payload/fifo_offset table */
874 node_info
->maxpayload
= maxpayload
;
875 node_info
->sspd
= sspd
;
876 node_info
->fifo
= fifo_addr
;
878 /* Now that we're done with the 1394 specific stuff, we'll
879 * need to alter some of the data. Believe it or not, all
880 * that needs to be done is sender_IP_address needs to be
881 * moved, the destination hardware address get stuffed
882 * in and the hardware address length set to 8.
884 * IMPORTANT: The code below overwrites 1394 specific data
885 * needed above so keep the munging of the data for the
886 * higher level IP stack last. */
889 arp_ptr
+= arp
->ar_hln
; /* skip over sender unique id */
890 *(u32
*)arp_ptr
= arp1394
->sip
; /* move sender IP addr */
891 arp_ptr
+= arp
->ar_pln
; /* skip over sender IP addr */
893 if (arp
->ar_op
== htons(ARPOP_REQUEST
))
894 memset(arp_ptr
, 0, sizeof(u64
));
896 memcpy(arp_ptr
, dev
->dev_addr
, sizeof(u64
));
899 /* Now add the ethernet header. */
900 if (dev_hard_header(skb
, dev
, ntohs(ether_type
), &dest_hw
, NULL
,
902 ret
= ether1394_type_trans(skb
, dev
);
907 static int fragment_overlap(struct list_head
*frag_list
, int offset
, int len
)
909 struct fragment_info
*fi
;
910 int end
= offset
+ len
;
912 list_for_each_entry(fi
, frag_list
, list
)
913 if (offset
< fi
->offset
+ fi
->len
&& end
> fi
->offset
)
919 static struct list_head
*find_partial_datagram(struct list_head
*pdgl
, int dgl
)
921 struct partial_datagram
*pd
;
923 list_for_each_entry(pd
, pdgl
, list
)
930 /* Assumes that new fragment does not overlap any existing fragments */
931 static int new_fragment(struct list_head
*frag_info
, int offset
, int len
)
933 struct list_head
*lh
;
934 struct fragment_info
*fi
, *fi2
, *new;
936 list_for_each(lh
, frag_info
) {
937 fi
= list_entry(lh
, struct fragment_info
, list
);
938 if (fi
->offset
+ fi
->len
== offset
) {
939 /* The new fragment can be tacked on to the end */
941 /* Did the new fragment plug a hole? */
942 fi2
= list_entry(lh
->next
, struct fragment_info
, list
);
943 if (fi
->offset
+ fi
->len
== fi2
->offset
) {
944 /* glue fragments together */
950 } else if (offset
+ len
== fi
->offset
) {
951 /* The new fragment can be tacked on to the beginning */
954 /* Did the new fragment plug a hole? */
955 fi2
= list_entry(lh
->prev
, struct fragment_info
, list
);
956 if (fi2
->offset
+ fi2
->len
== fi
->offset
) {
957 /* glue fragments together */
963 } else if (offset
> fi
->offset
+ fi
->len
) {
965 } else if (offset
+ len
< fi
->offset
) {
971 new = kmalloc(sizeof(*new), GFP_ATOMIC
);
975 new->offset
= offset
;
978 list_add(&new->list
, lh
);
982 static int new_partial_datagram(struct net_device
*dev
, struct list_head
*pdgl
,
983 int dgl
, int dg_size
, char *frag_buf
,
984 int frag_off
, int frag_len
)
986 struct partial_datagram
*new;
988 new = kmalloc(sizeof(*new), GFP_ATOMIC
);
992 INIT_LIST_HEAD(&new->frag_info
);
994 if (new_fragment(&new->frag_info
, frag_off
, frag_len
) < 0) {
1000 new->dg_size
= dg_size
;
1002 new->skb
= dev_alloc_skb(dg_size
+ dev
->hard_header_len
+ 15);
1004 struct fragment_info
*fi
= list_entry(new->frag_info
.next
,
1005 struct fragment_info
,
1012 skb_reserve(new->skb
, (dev
->hard_header_len
+ 15) & ~15);
1013 new->pbuf
= skb_put(new->skb
, dg_size
);
1014 memcpy(new->pbuf
+ frag_off
, frag_buf
, frag_len
);
1016 list_add(&new->list
, pdgl
);
1020 static int update_partial_datagram(struct list_head
*pdgl
, struct list_head
*lh
,
1021 char *frag_buf
, int frag_off
, int frag_len
)
1023 struct partial_datagram
*pd
=
1024 list_entry(lh
, struct partial_datagram
, list
);
1026 if (new_fragment(&pd
->frag_info
, frag_off
, frag_len
) < 0)
1029 memcpy(pd
->pbuf
+ frag_off
, frag_buf
, frag_len
);
1031 /* Move list entry to beginnig of list so that oldest partial
1032 * datagrams percolate to the end of the list */
1033 list_move(lh
, pdgl
);
1037 static int is_datagram_complete(struct list_head
*lh
, int dg_size
)
1039 struct partial_datagram
*pd
;
1040 struct fragment_info
*fi
;
1042 pd
= list_entry(lh
, struct partial_datagram
, list
);
1043 fi
= list_entry(pd
->frag_info
.next
, struct fragment_info
, list
);
1045 return (fi
->len
== dg_size
);
1048 /* Packet reception. We convert the IP1394 encapsulation header to an
1049 * ethernet header, and fill it with some of our other fields. This is
1050 * an incoming packet from the 1394 bus. */
1051 static int ether1394_data_handler(struct net_device
*dev
, int srcid
, int destid
,
1054 struct sk_buff
*skb
;
1055 unsigned long flags
;
1056 struct eth1394_priv
*priv
= netdev_priv(dev
);
1057 union eth1394_hdr
*hdr
= (union eth1394_hdr
*)buf
;
1058 __be16 ether_type
= cpu_to_be16(0); /* initialized to clear warning */
1060 struct unit_directory
*ud
= priv
->ud_list
[NODEID_TO_NODE(srcid
)];
1061 struct eth1394_node_info
*node_info
;
1064 struct eth1394_node_ref
*node
;
1065 node
= eth1394_find_node_nodeid(&priv
->ip_node_list
, srcid
);
1066 if (unlikely(!node
)) {
1067 HPSB_PRINT(KERN_ERR
, "ether1394 rx: sender nodeid "
1068 "lookup failure: " NODE_BUS_FMT
,
1069 NODE_BUS_ARGS(priv
->host
, srcid
));
1070 dev
->stats
.rx_dropped
++;
1075 priv
->ud_list
[NODEID_TO_NODE(srcid
)] = ud
;
1078 node_info
= dev_get_drvdata(&ud
->device
);
1080 /* First, did we receive a fragmented or unfragmented datagram? */
1081 hdr
->words
.word1
= ntohs(hdr
->words
.word1
);
1083 hdr_len
= hdr_type_len
[hdr
->common
.lf
];
1085 if (hdr
->common
.lf
== ETH1394_HDR_LF_UF
) {
1086 /* An unfragmented datagram has been received by the ieee1394
1087 * bus. Build an skbuff around it so we can pass it to the
1088 * high level network layer. */
1090 skb
= dev_alloc_skb(len
+ dev
->hard_header_len
+ 15);
1091 if (unlikely(!skb
)) {
1092 ETH1394_PRINT_G(KERN_ERR
, "Out of memory\n");
1093 dev
->stats
.rx_dropped
++;
1096 skb_reserve(skb
, (dev
->hard_header_len
+ 15) & ~15);
1097 memcpy(skb_put(skb
, len
- hdr_len
), buf
+ hdr_len
,
1099 ether_type
= hdr
->uf
.ether_type
;
1101 /* A datagram fragment has been received, now the fun begins. */
1103 struct list_head
*pdgl
, *lh
;
1104 struct partial_datagram
*pd
;
1106 int fg_len
= len
- hdr_len
;
1110 struct pdg_list
*pdg
= &(node_info
->pdg
);
1112 hdr
->words
.word3
= ntohs(hdr
->words
.word3
);
1113 /* The 4th header word is reserved so no need to do ntohs() */
1115 if (hdr
->common
.lf
== ETH1394_HDR_LF_FF
) {
1116 ether_type
= hdr
->ff
.ether_type
;
1118 dg_size
= hdr
->ff
.dg_size
+ 1;
1121 hdr
->words
.word2
= ntohs(hdr
->words
.word2
);
1123 dg_size
= hdr
->sf
.dg_size
+ 1;
1124 fg_off
= hdr
->sf
.fg_off
;
1126 spin_lock_irqsave(&pdg
->lock
, flags
);
1128 pdgl
= &(pdg
->list
);
1129 lh
= find_partial_datagram(pdgl
, dgl
);
1132 while (pdg
->sz
>= max_partial_datagrams
) {
1133 /* remove the oldest */
1134 purge_partial_datagram(pdgl
->prev
);
1138 retval
= new_partial_datagram(dev
, pdgl
, dgl
, dg_size
,
1139 buf
+ hdr_len
, fg_off
,
1142 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1146 lh
= find_partial_datagram(pdgl
, dgl
);
1148 pd
= list_entry(lh
, struct partial_datagram
, list
);
1150 if (fragment_overlap(&pd
->frag_info
, fg_off
, fg_len
)) {
1151 /* Overlapping fragments, obliterate old
1152 * datagram and start new one. */
1153 purge_partial_datagram(lh
);
1154 retval
= new_partial_datagram(dev
, pdgl
, dgl
,
1160 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1164 retval
= update_partial_datagram(pdgl
, lh
,
1168 /* Couldn't save off fragment anyway
1169 * so might as well obliterate the
1171 purge_partial_datagram(lh
);
1173 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1176 } /* fragment overlap */
1177 } /* new datagram or add to existing one */
1179 pd
= list_entry(lh
, struct partial_datagram
, list
);
1181 if (hdr
->common
.lf
== ETH1394_HDR_LF_FF
)
1182 pd
->ether_type
= ether_type
;
1184 if (is_datagram_complete(lh
, dg_size
)) {
1185 ether_type
= pd
->ether_type
;
1187 skb
= skb_get(pd
->skb
);
1188 purge_partial_datagram(lh
);
1189 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1191 /* Datagram is not complete, we're done for the
1193 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1196 } /* unframgented datagram or fragmented one */
1198 /* Write metadata, and then pass to the receive level */
1200 skb
->ip_summed
= CHECKSUM_UNNECESSARY
; /* don't check it */
1202 /* Parse the encapsulation header. This actually does the job of
1203 * converting to an ethernet frame header, aswell as arp
1204 * conversion if needed. ARP conversion is easier in this
1205 * direction, since we are using ethernet as our backend. */
1206 skb
->protocol
= ether1394_parse_encap(skb
, dev
, srcid
, destid
,
1209 spin_lock_irqsave(&priv
->lock
, flags
);
1211 if (!skb
->protocol
) {
1212 dev
->stats
.rx_errors
++;
1213 dev
->stats
.rx_dropped
++;
1214 dev_kfree_skb_any(skb
);
1215 } else if (netif_rx(skb
) == NET_RX_DROP
) {
1216 dev
->stats
.rx_errors
++;
1217 dev
->stats
.rx_dropped
++;
1219 dev
->stats
.rx_packets
++;
1220 dev
->stats
.rx_bytes
+= skb
->len
;
1223 spin_unlock_irqrestore(&priv
->lock
, flags
);
1226 if (netif_queue_stopped(dev
))
1227 netif_wake_queue(dev
);
1232 static int ether1394_write(struct hpsb_host
*host
, int srcid
, int destid
,
1233 quadlet_t
*data
, u64 addr
, size_t len
, u16 flags
)
1235 struct eth1394_host_info
*hi
;
1237 hi
= hpsb_get_hostinfo(ð1394_highlevel
, host
);
1238 if (unlikely(!hi
)) {
1239 ETH1394_PRINT_G(KERN_ERR
, "No net device at fw-host%d\n",
1241 return RCODE_ADDRESS_ERROR
;
1244 if (ether1394_data_handler(hi
->dev
, srcid
, destid
, (char*)data
, len
))
1245 return RCODE_ADDRESS_ERROR
;
1247 return RCODE_COMPLETE
;
1250 static void ether1394_iso(struct hpsb_iso
*iso
)
1254 struct eth1394_host_info
*hi
;
1255 struct net_device
*dev
;
1262 hi
= hpsb_get_hostinfo(ð1394_highlevel
, iso
->host
);
1263 if (unlikely(!hi
)) {
1264 ETH1394_PRINT_G(KERN_ERR
, "No net device at fw-host%d\n",
1271 nready
= hpsb_iso_n_ready(iso
);
1272 for (i
= 0; i
< nready
; i
++) {
1273 struct hpsb_iso_packet_info
*info
=
1274 &iso
->infos
[(iso
->first_packet
+ i
) % iso
->buf_packets
];
1275 data
= (__be32
*)(iso
->data_buf
.kvirt
+ info
->offset
);
1277 /* skip over GASP header */
1278 buf
= (char *)data
+ 8;
1279 len
= info
->len
- 8;
1281 specifier_id
= (be32_to_cpu(data
[0]) & 0xffff) << 8 |
1282 (be32_to_cpu(data
[1]) & 0xff000000) >> 24;
1283 source_id
= be32_to_cpu(data
[0]) >> 16;
1285 if (info
->channel
!= (iso
->host
->csr
.broadcast_channel
& 0x3f)
1286 || specifier_id
!= ETHER1394_GASP_SPECIFIER_ID
) {
1287 /* This packet is not for us */
1290 ether1394_data_handler(dev
, source_id
, LOCAL_BUS
| ALL_NODES
,
1294 hpsb_iso_recv_release_packets(iso
, i
);
1298 /******************************************
1299 * Datagram transmission code
1300 ******************************************/
1302 /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire
1303 * arphdr) is the same format as the ip1394 header, so they overlap. The rest
1304 * needs to be munged a bit. The remainder of the arphdr is formatted based
1305 * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to
1308 * Now that the EUI is used for the hardware address all we need to do to make
1309 * this work for 1394 is to insert 2 quadlets that contain max_rec size,
1310 * speed, and unicast FIFO address information between the sender_unique_id
1311 * and the IP addresses.
1313 static void ether1394_arp_to_1394arp(struct sk_buff
*skb
,
1314 struct net_device
*dev
)
1316 struct eth1394_priv
*priv
= netdev_priv(dev
);
1317 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
1318 unsigned char *arp_ptr
= (unsigned char *)(arp
+ 1);
1319 struct eth1394_arp
*arp1394
= (struct eth1394_arp
*)skb
->data
;
1321 arp1394
->hw_addr_len
= 16;
1322 arp1394
->sip
= *(u32
*)(arp_ptr
+ ETH1394_ALEN
);
1323 arp1394
->max_rec
= priv
->host
->csr
.max_rec
;
1324 arp1394
->sspd
= priv
->host
->csr
.lnk_spd
;
1325 arp1394
->fifo_hi
= htons(priv
->local_fifo
>> 32);
1326 arp1394
->fifo_lo
= htonl(priv
->local_fifo
& ~0x0);
1329 /* We need to encapsulate the standard header with our own. We use the
1330 * ethernet header's proto for our own. */
1331 static unsigned int ether1394_encapsulate_prep(unsigned int max_payload
,
1333 union eth1394_hdr
*hdr
,
1334 u16 dg_size
, u16 dgl
)
1336 unsigned int adj_max_payload
=
1337 max_payload
- hdr_type_len
[ETH1394_HDR_LF_UF
];
1339 /* Does it all fit in one packet? */
1340 if (dg_size
<= adj_max_payload
) {
1341 hdr
->uf
.lf
= ETH1394_HDR_LF_UF
;
1342 hdr
->uf
.ether_type
= proto
;
1344 hdr
->ff
.lf
= ETH1394_HDR_LF_FF
;
1345 hdr
->ff
.ether_type
= proto
;
1346 hdr
->ff
.dg_size
= dg_size
- 1;
1348 adj_max_payload
= max_payload
- hdr_type_len
[ETH1394_HDR_LF_FF
];
1350 return DIV_ROUND_UP(dg_size
, adj_max_payload
);
1353 static unsigned int ether1394_encapsulate(struct sk_buff
*skb
,
1354 unsigned int max_payload
,
1355 union eth1394_hdr
*hdr
)
1357 union eth1394_hdr
*bufhdr
;
1358 int ftype
= hdr
->common
.lf
;
1359 int hdrsz
= hdr_type_len
[ftype
];
1360 unsigned int adj_max_payload
= max_payload
- hdrsz
;
1363 case ETH1394_HDR_LF_UF
:
1364 bufhdr
= (union eth1394_hdr
*)skb_push(skb
, hdrsz
);
1365 bufhdr
->words
.word1
= htons(hdr
->words
.word1
);
1366 bufhdr
->words
.word2
= hdr
->words
.word2
;
1369 case ETH1394_HDR_LF_FF
:
1370 bufhdr
= (union eth1394_hdr
*)skb_push(skb
, hdrsz
);
1371 bufhdr
->words
.word1
= htons(hdr
->words
.word1
);
1372 bufhdr
->words
.word2
= hdr
->words
.word2
;
1373 bufhdr
->words
.word3
= htons(hdr
->words
.word3
);
1374 bufhdr
->words
.word4
= 0;
1376 /* Set frag type here for future interior fragments */
1377 hdr
->common
.lf
= ETH1394_HDR_LF_IF
;
1382 hdr
->sf
.fg_off
+= adj_max_payload
;
1383 bufhdr
= (union eth1394_hdr
*)skb_pull(skb
, adj_max_payload
);
1384 if (max_payload
>= skb
->len
)
1385 hdr
->common
.lf
= ETH1394_HDR_LF_LF
;
1386 bufhdr
->words
.word1
= htons(hdr
->words
.word1
);
1387 bufhdr
->words
.word2
= htons(hdr
->words
.word2
);
1388 bufhdr
->words
.word3
= htons(hdr
->words
.word3
);
1389 bufhdr
->words
.word4
= 0;
1391 return min(max_payload
, skb
->len
);
1394 static struct hpsb_packet
*ether1394_alloc_common_packet(struct hpsb_host
*host
)
1396 struct hpsb_packet
*p
;
1398 p
= hpsb_alloc_packet(0);
1401 p
->generation
= get_hpsb_generation(host
);
1402 p
->type
= hpsb_async
;
1407 static int ether1394_prep_write_packet(struct hpsb_packet
*p
,
1408 struct hpsb_host
*host
, nodeid_t node
,
1409 u64 addr
, void *data
, int tx_len
)
1413 if (hpsb_get_tlabel(p
))
1416 p
->tcode
= TCODE_WRITEB
;
1417 p
->header_size
= 16;
1418 p
->expect_response
= 1;
1420 p
->node_id
<< 16 | p
->tlabel
<< 10 | 1 << 8 | TCODE_WRITEB
<< 4;
1421 p
->header
[1] = host
->node_id
<< 16 | addr
>> 32;
1422 p
->header
[2] = addr
& 0xffffffff;
1423 p
->header
[3] = tx_len
<< 16;
1424 p
->data_size
= (tx_len
+ 3) & ~3;
1430 static void ether1394_prep_gasp_packet(struct hpsb_packet
*p
,
1431 struct eth1394_priv
*priv
,
1432 struct sk_buff
*skb
, int length
)
1435 p
->tcode
= TCODE_STREAM_DATA
;
1437 p
->header
[0] = length
<< 16 | 3 << 14 | priv
->broadcast_channel
<< 8 |
1438 TCODE_STREAM_DATA
<< 4;
1439 p
->data_size
= length
;
1440 p
->data
= (quadlet_t
*)skb
->data
- 2;
1441 p
->data
[0] = cpu_to_be32(priv
->host
->node_id
<< 16 |
1442 ETHER1394_GASP_SPECIFIER_ID_HI
);
1443 p
->data
[1] = cpu_to_be32(ETHER1394_GASP_SPECIFIER_ID_LO
<< 24 |
1444 ETHER1394_GASP_VERSION
);
1446 p
->speed_code
= priv
->bc_sspd
;
1448 /* prevent hpsb_send_packet() from overriding our speed code */
1449 p
->node_id
= LOCAL_BUS
| ALL_NODES
;
1452 static void ether1394_free_packet(struct hpsb_packet
*packet
)
1454 if (packet
->tcode
!= TCODE_STREAM_DATA
)
1455 hpsb_free_tlabel(packet
);
1456 hpsb_free_packet(packet
);
1459 static void ether1394_complete_cb(void *__ptask
);
1461 static int ether1394_send_packet(struct packet_task
*ptask
, unsigned int tx_len
)
1463 struct eth1394_priv
*priv
= ptask
->priv
;
1464 struct hpsb_packet
*packet
= NULL
;
1466 packet
= ether1394_alloc_common_packet(priv
->host
);
1470 if (ptask
->tx_type
== ETH1394_GASP
) {
1471 int length
= tx_len
+ 2 * sizeof(quadlet_t
);
1473 ether1394_prep_gasp_packet(packet
, priv
, ptask
->skb
, length
);
1474 } else if (ether1394_prep_write_packet(packet
, priv
->host
,
1476 ptask
->addr
, ptask
->skb
->data
,
1478 hpsb_free_packet(packet
);
1482 ptask
->packet
= packet
;
1483 hpsb_set_packet_complete_task(ptask
->packet
, ether1394_complete_cb
,
1486 if (hpsb_send_packet(packet
) < 0) {
1487 ether1394_free_packet(packet
);
1494 /* Task function to be run when a datagram transmission is completed */
1495 static void ether1394_dg_complete(struct packet_task
*ptask
, int fail
)
1497 struct sk_buff
*skb
= ptask
->skb
;
1498 struct net_device
*dev
= skb
->dev
;
1499 struct eth1394_priv
*priv
= netdev_priv(dev
);
1500 unsigned long flags
;
1503 spin_lock_irqsave(&priv
->lock
, flags
);
1505 dev
->stats
.tx_dropped
++;
1506 dev
->stats
.tx_errors
++;
1508 dev
->stats
.tx_bytes
+= skb
->len
;
1509 dev
->stats
.tx_packets
++;
1511 spin_unlock_irqrestore(&priv
->lock
, flags
);
1513 dev_kfree_skb_any(skb
);
1514 kmem_cache_free(packet_task_cache
, ptask
);
1517 /* Callback for when a packet has been sent and the status of that packet is
1519 static void ether1394_complete_cb(void *__ptask
)
1521 struct packet_task
*ptask
= (struct packet_task
*)__ptask
;
1522 struct hpsb_packet
*packet
= ptask
->packet
;
1525 if (packet
->tcode
!= TCODE_STREAM_DATA
)
1526 fail
= hpsb_packet_success(packet
);
1528 ether1394_free_packet(packet
);
1530 ptask
->outstanding_pkts
--;
1531 if (ptask
->outstanding_pkts
> 0 && !fail
) {
1534 /* Add the encapsulation header to the fragment */
1535 tx_len
= ether1394_encapsulate(ptask
->skb
, ptask
->max_payload
,
1537 err
= ether1394_send_packet(ptask
, tx_len
);
1540 ETH1394_PRINT_G(KERN_ERR
, "Out of tlabels\n");
1542 ether1394_dg_complete(ptask
, 1);
1545 ether1394_dg_complete(ptask
, fail
);
1549 /* Transmit a packet (called by kernel) */
1550 static netdev_tx_t
ether1394_tx(struct sk_buff
*skb
,
1551 struct net_device
*dev
)
1553 struct eth1394hdr hdr_buf
;
1554 struct eth1394_priv
*priv
= netdev_priv(dev
);
1556 unsigned long flags
;
1558 eth1394_tx_type tx_type
;
1559 unsigned int tx_len
;
1560 unsigned int max_payload
;
1563 struct packet_task
*ptask
;
1564 struct eth1394_node_ref
*node
;
1565 struct eth1394_node_info
*node_info
= NULL
;
1567 ptask
= kmem_cache_alloc(packet_task_cache
, GFP_ATOMIC
);
1571 /* XXX Ignore this for now. Noticed that when MacOSX is the IRM,
1572 * it does not set our validity bit. We need to compensate for
1573 * that somewhere else, but not in eth1394. */
1575 if ((priv
->host
->csr
.broadcast_channel
& 0xc0000000) != 0xc0000000)
1579 skb
= skb_share_check(skb
, GFP_ATOMIC
);
1583 /* Get rid of the fake eth1394 header, but first make a copy.
1584 * We might need to rebuild the header on tx failure. */
1585 memcpy(&hdr_buf
, skb
->data
, sizeof(hdr_buf
));
1586 skb_pull(skb
, ETH1394_HLEN
);
1588 proto
= hdr_buf
.h_proto
;
1591 /* Set the transmission type for the packet. ARP packets and IP
1592 * broadcast packets are sent via GASP. */
1593 if (memcmp(hdr_buf
.h_dest
, dev
->broadcast
, ETH1394_ALEN
) == 0 ||
1594 proto
== htons(ETH_P_ARP
) ||
1595 (proto
== htons(ETH_P_IP
) &&
1596 IN_MULTICAST(ntohl(ip_hdr(skb
)->daddr
)))) {
1597 tx_type
= ETH1394_GASP
;
1598 dest_node
= LOCAL_BUS
| ALL_NODES
;
1599 max_payload
= priv
->bc_maxpayload
- ETHER1394_GASP_OVERHEAD
;
1600 BUG_ON(max_payload
< 512 - ETHER1394_GASP_OVERHEAD
);
1602 if (max_payload
< dg_size
+ hdr_type_len
[ETH1394_HDR_LF_UF
])
1605 __be64 guid
= get_unaligned((__be64
*)hdr_buf
.h_dest
);
1607 node
= eth1394_find_node_guid(&priv
->ip_node_list
,
1612 node_info
= dev_get_drvdata(&node
->ud
->device
);
1613 if (node_info
->fifo
== CSR1212_INVALID_ADDR_SPACE
)
1616 dest_node
= node
->ud
->ne
->nodeid
;
1617 max_payload
= node_info
->maxpayload
;
1618 BUG_ON(max_payload
< 512 - ETHER1394_GASP_OVERHEAD
);
1620 dgl
= node_info
->dgl
;
1621 if (max_payload
< dg_size
+ hdr_type_len
[ETH1394_HDR_LF_UF
])
1623 tx_type
= ETH1394_WRREQ
;
1626 /* If this is an ARP packet, convert it */
1627 if (proto
== htons(ETH_P_ARP
))
1628 ether1394_arp_to_1394arp(skb
, dev
);
1630 ptask
->hdr
.words
.word1
= 0;
1631 ptask
->hdr
.words
.word2
= 0;
1632 ptask
->hdr
.words
.word3
= 0;
1633 ptask
->hdr
.words
.word4
= 0;
1636 ptask
->tx_type
= tx_type
;
1638 if (tx_type
!= ETH1394_GASP
) {
1641 spin_lock_irqsave(&priv
->lock
, flags
);
1642 addr
= node_info
->fifo
;
1643 spin_unlock_irqrestore(&priv
->lock
, flags
);
1646 ptask
->dest_node
= dest_node
;
1649 ptask
->tx_type
= tx_type
;
1650 ptask
->max_payload
= max_payload
;
1651 ptask
->outstanding_pkts
= ether1394_encapsulate_prep(max_payload
,
1652 proto
, &ptask
->hdr
, dg_size
, dgl
);
1654 /* Add the encapsulation header to the fragment */
1655 tx_len
= ether1394_encapsulate(skb
, max_payload
, &ptask
->hdr
);
1656 dev
->trans_start
= jiffies
;
1657 if (ether1394_send_packet(ptask
, tx_len
)) {
1658 if (dest_node
== (LOCAL_BUS
| ALL_NODES
))
1661 /* At this point we want to restore the packet. When we return
1662 * here with NETDEV_TX_BUSY we will get another entrance in this
1663 * routine with the same skb and we need it to look the same.
1664 * So we pull 4 more bytes, then build the header again. */
1666 ether1394_header(skb
, dev
, ntohs(hdr_buf
.h_proto
),
1667 hdr_buf
.h_dest
, NULL
, 0);
1669 /* Most failures of ether1394_send_packet are recoverable. */
1670 netif_stop_queue(dev
);
1671 priv
->wake_node
= dest_node
;
1672 schedule_work(&priv
->wake
);
1673 kmem_cache_free(packet_task_cache
, ptask
);
1674 return NETDEV_TX_BUSY
;
1677 return NETDEV_TX_OK
;
1680 kmem_cache_free(packet_task_cache
, ptask
);
1685 spin_lock_irqsave(&priv
->lock
, flags
);
1686 dev
->stats
.tx_dropped
++;
1687 dev
->stats
.tx_errors
++;
1688 spin_unlock_irqrestore(&priv
->lock
, flags
);
1690 return NETDEV_TX_OK
;
1693 static int __init
ether1394_init_module(void)
1697 packet_task_cache
= kmem_cache_create("packet_task",
1698 sizeof(struct packet_task
),
1700 if (!packet_task_cache
)
1703 hpsb_register_highlevel(ð1394_highlevel
);
1704 err
= hpsb_register_protocol(ð1394_proto_driver
);
1706 hpsb_unregister_highlevel(ð1394_highlevel
);
1707 kmem_cache_destroy(packet_task_cache
);
1712 static void __exit
ether1394_exit_module(void)
1714 hpsb_unregister_protocol(ð1394_proto_driver
);
1715 hpsb_unregister_highlevel(ð1394_highlevel
);
1716 kmem_cache_destroy(packet_task_cache
);
1719 module_init(ether1394_init_module
);
1720 module_exit(ether1394_exit_module
);