2 * eth1394.c -- Ethernet driver for Linux IEEE-1394 Subsystem
4 * Copyright (C) 2001-2003 Ben Collins <bcollins@debian.org>
5 * 2000 Bonin Franck <boninf@free.fr>
6 * 2003 Steve Kinneberg <kinnebergsteve@acmsystems.com>
8 * Mainly based on work by Emanuel Pirker and Andreas E. Bombe
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software Foundation,
22 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 /* This driver intends to support RFC 2734, which describes a method for
26 * transporting IPv4 datagrams over IEEE-1394 serial busses. This driver
27 * will ultimately support that method, but currently falls short in
32 * - Add MCAP. Limited Multicast exists only to 224.0.0.1 and 224.0.0.2.
34 * Non-RFC 2734 related:
35 * - Handle fragmented skb's coming from the networking layer.
36 * - Move generic GASP reception to core 1394 code
37 * - Convert kmalloc/kfree for link fragments to use kmem_cache_* instead
38 * - Stability improvements
39 * - Performance enhancements
40 * - Consider garbage collecting old partial datagrams after X amount of time
44 #include <linux/module.h>
46 #include <linux/sched.h>
47 #include <linux/kernel.h>
48 #include <linux/slab.h>
49 #include <linux/errno.h>
50 #include <linux/types.h>
51 #include <linux/delay.h>
52 #include <linux/init.h>
54 #include <linux/netdevice.h>
55 #include <linux/inetdevice.h>
56 #include <linux/etherdevice.h>
57 #include <linux/if_arp.h>
58 #include <linux/if_ether.h>
61 #include <linux/tcp.h>
62 #include <linux/skbuff.h>
63 #include <linux/bitops.h>
64 #include <linux/ethtool.h>
65 #include <asm/uaccess.h>
66 #include <asm/delay.h>
67 #include <asm/semaphore.h>
71 #include "ieee1394_types.h"
72 #include "ieee1394_core.h"
73 #include "ieee1394_transactions.h"
75 #include "highlevel.h"
79 #include "config_roms.h"
81 #define ETH1394_PRINT_G(level, fmt, args...) \
82 printk(level "%s: " fmt, driver_name, ## args)
84 #define ETH1394_PRINT(level, dev_name, fmt, args...) \
85 printk(level "%s: %s: " fmt, driver_name, dev_name, ## args)
87 #define DEBUG(fmt, args...) \
88 printk(KERN_ERR "%s:%s[%d]: " fmt "\n", driver_name, __FUNCTION__, __LINE__, ## args)
89 #define TRACE() printk(KERN_ERR "%s:%s[%d] ---- TRACE\n", driver_name, __FUNCTION__, __LINE__)
91 static char version
[] __devinitdata
=
92 "$Rev: 1312 $ Ben Collins <bcollins@debian.org>";
94 struct fragment_info
{
95 struct list_head list
;
100 struct partial_datagram
{
101 struct list_head list
;
107 struct list_head frag_info
;
111 struct list_head list
; /* partial datagram list per node */
112 unsigned int sz
; /* partial datagram list size per node */
113 spinlock_t lock
; /* partial datagram lock */
116 struct eth1394_host_info
{
117 struct hpsb_host
*host
;
118 struct net_device
*dev
;
121 struct eth1394_node_ref
{
122 struct unit_directory
*ud
;
123 struct list_head list
;
126 struct eth1394_node_info
{
127 u16 maxpayload
; /* Max payload */
128 u8 sspd
; /* Max speed */
129 u64 fifo
; /* FIFO address */
130 struct pdg_list pdg
; /* partial RX datagram lists */
131 int dgl
; /* Outgoing datagram label */
134 /* Our ieee1394 highlevel driver */
135 #define ETH1394_DRIVER_NAME "eth1394"
136 static const char driver_name
[] = ETH1394_DRIVER_NAME
;
138 static kmem_cache_t
*packet_task_cache
;
140 static struct hpsb_highlevel eth1394_highlevel
;
142 /* Use common.lf to determine header len */
143 static const int hdr_type_len
[] = {
144 sizeof (struct eth1394_uf_hdr
),
145 sizeof (struct eth1394_ff_hdr
),
146 sizeof (struct eth1394_sf_hdr
),
147 sizeof (struct eth1394_sf_hdr
)
150 /* Change this to IEEE1394_SPEED_S100 to make testing easier */
151 #define ETH1394_SPEED_DEF IEEE1394_SPEED_MAX
153 /* For now, this needs to be 1500, so that XP works with us */
154 #define ETH1394_DATA_LEN ETH_DATA_LEN
156 static const u16 eth1394_speedto_maxpayload
[] = {
157 /* S100, S200, S400, S800, S1600, S3200 */
158 512, 1024, 2048, 4096, 4096, 4096
161 MODULE_AUTHOR("Ben Collins (bcollins@debian.org)");
162 MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)");
163 MODULE_LICENSE("GPL");
165 /* The max_partial_datagrams parameter is the maximum number of fragmented
166 * datagrams per node that eth1394 will keep in memory. Providing an upper
167 * bound allows us to limit the amount of memory that partial datagrams
168 * consume in the event that some partial datagrams are never completed.
170 static int max_partial_datagrams
= 25;
171 module_param(max_partial_datagrams
, int, S_IRUGO
| S_IWUSR
);
172 MODULE_PARM_DESC(max_partial_datagrams
,
173 "Maximum number of partially received fragmented datagrams "
177 static int ether1394_header(struct sk_buff
*skb
, struct net_device
*dev
,
178 unsigned short type
, void *daddr
, void *saddr
,
180 static int ether1394_rebuild_header(struct sk_buff
*skb
);
181 static int ether1394_header_parse(struct sk_buff
*skb
, unsigned char *haddr
);
182 static int ether1394_header_cache(struct neighbour
*neigh
, struct hh_cache
*hh
);
183 static void ether1394_header_cache_update(struct hh_cache
*hh
,
184 struct net_device
*dev
,
185 unsigned char * haddr
);
186 static int ether1394_mac_addr(struct net_device
*dev
, void *p
);
188 static void purge_partial_datagram(struct list_head
*old
);
189 static int ether1394_tx(struct sk_buff
*skb
, struct net_device
*dev
);
190 static void ether1394_iso(struct hpsb_iso
*iso
);
192 static struct ethtool_ops ethtool_ops
;
194 static int ether1394_write(struct hpsb_host
*host
, int srcid
, int destid
,
195 quadlet_t
*data
, u64 addr
, size_t len
, u16 flags
);
196 static void ether1394_add_host (struct hpsb_host
*host
);
197 static void ether1394_remove_host (struct hpsb_host
*host
);
198 static void ether1394_host_reset (struct hpsb_host
*host
);
200 /* Function for incoming 1394 packets */
201 static struct hpsb_address_ops addr_ops
= {
202 .write
= ether1394_write
,
205 /* Ieee1394 highlevel driver functions */
206 static struct hpsb_highlevel eth1394_highlevel
= {
208 .add_host
= ether1394_add_host
,
209 .remove_host
= ether1394_remove_host
,
210 .host_reset
= ether1394_host_reset
,
214 /* This is called after an "ifup" */
215 static int ether1394_open (struct net_device
*dev
)
217 struct eth1394_priv
*priv
= netdev_priv(dev
);
220 /* Something bad happened, don't even try */
221 if (priv
->bc_state
== ETHER1394_BC_ERROR
) {
222 /* we'll try again */
223 priv
->iso
= hpsb_iso_recv_init(priv
->host
,
224 ETHER1394_ISO_BUF_SIZE
,
225 ETHER1394_GASP_BUFFERS
,
226 priv
->broadcast_channel
,
227 HPSB_ISO_DMA_PACKET_PER_BUFFER
,
229 if (priv
->iso
== NULL
) {
230 ETH1394_PRINT(KERN_ERR
, dev
->name
,
231 "Could not allocate isochronous receive "
232 "context for the broadcast channel\n");
233 priv
->bc_state
= ETHER1394_BC_ERROR
;
236 if (hpsb_iso_recv_start(priv
->iso
, -1, (1 << 3), -1) < 0)
237 priv
->bc_state
= ETHER1394_BC_STOPPED
;
239 priv
->bc_state
= ETHER1394_BC_RUNNING
;
246 netif_start_queue (dev
);
250 /* This is called after an "ifdown" */
251 static int ether1394_stop (struct net_device
*dev
)
253 netif_stop_queue (dev
);
257 /* Return statistics to the caller */
258 static struct net_device_stats
*ether1394_stats (struct net_device
*dev
)
260 return &(((struct eth1394_priv
*)netdev_priv(dev
))->stats
);
263 /* What to do if we timeout. I think a host reset is probably in order, so
264 * that's what we do. Should we increment the stat counters too? */
265 static void ether1394_tx_timeout (struct net_device
*dev
)
267 ETH1394_PRINT (KERN_ERR
, dev
->name
, "Timeout, resetting host %s\n",
268 ((struct eth1394_priv
*)netdev_priv(dev
))->host
->driver
->name
);
270 highlevel_host_reset (((struct eth1394_priv
*)netdev_priv(dev
))->host
);
272 netif_wake_queue (dev
);
275 static int ether1394_change_mtu(struct net_device
*dev
, int new_mtu
)
277 struct eth1394_priv
*priv
= netdev_priv(dev
);
279 if ((new_mtu
< 68) ||
280 (new_mtu
> min(ETH1394_DATA_LEN
,
281 (int)((1 << (priv
->host
->csr
.max_rec
+ 1)) -
282 (sizeof(union eth1394_hdr
) +
283 ETHER1394_GASP_OVERHEAD
)))))
289 static void purge_partial_datagram(struct list_head
*old
)
291 struct partial_datagram
*pd
= list_entry(old
, struct partial_datagram
, list
);
292 struct list_head
*lh
, *n
;
294 list_for_each_safe(lh
, n
, &pd
->frag_info
) {
295 struct fragment_info
*fi
= list_entry(lh
, struct fragment_info
, list
);
304 /******************************************
305 * 1394 bus activity functions
306 ******************************************/
308 static struct eth1394_node_ref
*eth1394_find_node(struct list_head
*inl
,
309 struct unit_directory
*ud
)
311 struct eth1394_node_ref
*node
;
313 list_for_each_entry(node
, inl
, list
)
320 static struct eth1394_node_ref
*eth1394_find_node_guid(struct list_head
*inl
,
323 struct eth1394_node_ref
*node
;
325 list_for_each_entry(node
, inl
, list
)
326 if (node
->ud
->ne
->guid
== guid
)
332 static struct eth1394_node_ref
*eth1394_find_node_nodeid(struct list_head
*inl
,
335 struct eth1394_node_ref
*node
;
336 list_for_each_entry(node
, inl
, list
) {
337 if (node
->ud
->ne
->nodeid
== nodeid
)
344 static int eth1394_probe(struct device
*dev
)
346 struct unit_directory
*ud
;
347 struct eth1394_host_info
*hi
;
348 struct eth1394_priv
*priv
;
349 struct eth1394_node_ref
*new_node
;
350 struct eth1394_node_info
*node_info
;
352 ud
= container_of(dev
, struct unit_directory
, device
);
354 hi
= hpsb_get_hostinfo(ð1394_highlevel
, ud
->ne
->host
);
358 new_node
= kmalloc(sizeof(struct eth1394_node_ref
),
359 in_interrupt() ? GFP_ATOMIC
: GFP_KERNEL
);
363 node_info
= kmalloc(sizeof(struct eth1394_node_info
),
364 in_interrupt() ? GFP_ATOMIC
: GFP_KERNEL
);
370 spin_lock_init(&node_info
->pdg
.lock
);
371 INIT_LIST_HEAD(&node_info
->pdg
.list
);
372 node_info
->pdg
.sz
= 0;
373 node_info
->fifo
= ETHER1394_INVALID_ADDR
;
375 ud
->device
.driver_data
= node_info
;
378 priv
= netdev_priv(hi
->dev
);
379 list_add_tail(&new_node
->list
, &priv
->ip_node_list
);
384 static int eth1394_remove(struct device
*dev
)
386 struct unit_directory
*ud
;
387 struct eth1394_host_info
*hi
;
388 struct eth1394_priv
*priv
;
389 struct eth1394_node_ref
*old_node
;
390 struct eth1394_node_info
*node_info
;
391 struct list_head
*lh
, *n
;
394 ud
= container_of(dev
, struct unit_directory
, device
);
395 hi
= hpsb_get_hostinfo(ð1394_highlevel
, ud
->ne
->host
);
399 priv
= netdev_priv(hi
->dev
);
401 old_node
= eth1394_find_node(&priv
->ip_node_list
, ud
);
404 list_del(&old_node
->list
);
407 node_info
= (struct eth1394_node_info
*)ud
->device
.driver_data
;
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
);
415 spin_unlock_irqrestore(&node_info
->pdg
.lock
, flags
);
418 ud
->device
.driver_data
= NULL
;
423 static int eth1394_update(struct unit_directory
*ud
)
425 struct eth1394_host_info
*hi
;
426 struct eth1394_priv
*priv
;
427 struct eth1394_node_ref
*node
;
428 struct eth1394_node_info
*node_info
;
430 hi
= hpsb_get_hostinfo(ð1394_highlevel
, ud
->ne
->host
);
434 priv
= netdev_priv(hi
->dev
);
436 node
= eth1394_find_node(&priv
->ip_node_list
, ud
);
439 node
= kmalloc(sizeof(struct eth1394_node_ref
),
440 in_interrupt() ? GFP_ATOMIC
: GFP_KERNEL
);
444 node_info
= kmalloc(sizeof(struct eth1394_node_info
),
445 in_interrupt() ? GFP_ATOMIC
: GFP_KERNEL
);
451 spin_lock_init(&node_info
->pdg
.lock
);
452 INIT_LIST_HEAD(&node_info
->pdg
.list
);
453 node_info
->pdg
.sz
= 0;
455 ud
->device
.driver_data
= node_info
;
458 priv
= netdev_priv(hi
->dev
);
459 list_add_tail(&node
->list
, &priv
->ip_node_list
);
466 static struct ieee1394_device_id eth1394_id_table
[] = {
468 .match_flags
= (IEEE1394_MATCH_SPECIFIER_ID
|
469 IEEE1394_MATCH_VERSION
),
470 .specifier_id
= ETHER1394_GASP_SPECIFIER_ID
,
471 .version
= ETHER1394_GASP_VERSION
,
476 MODULE_DEVICE_TABLE(ieee1394
, eth1394_id_table
);
478 static struct hpsb_protocol_driver eth1394_proto_driver
= {
479 .name
= "IPv4 over 1394 Driver",
480 .id_table
= eth1394_id_table
,
481 .update
= eth1394_update
,
483 .name
= ETH1394_DRIVER_NAME
,
484 .bus
= &ieee1394_bus_type
,
485 .probe
= eth1394_probe
,
486 .remove
= eth1394_remove
,
491 static void ether1394_reset_priv (struct net_device
*dev
, int set_mtu
)
495 struct eth1394_priv
*priv
= netdev_priv(dev
);
496 struct hpsb_host
*host
= priv
->host
;
497 u64 guid
= *((u64
*)&(host
->csr
.rom
->bus_info_data
[3]));
498 u16 maxpayload
= 1 << (host
->csr
.max_rec
+ 1);
499 int max_speed
= IEEE1394_SPEED_MAX
;
501 spin_lock_irqsave (&priv
->lock
, flags
);
503 memset(priv
->ud_list
, 0, sizeof(struct node_entry
*) * ALL_NODES
);
504 priv
->bc_maxpayload
= 512;
506 /* Determine speed limit */
507 for (i
= 0; i
< host
->node_count
; i
++)
508 if (max_speed
> host
->speed_map
[NODEID_TO_NODE(host
->node_id
) *
510 max_speed
= host
->speed_map
[NODEID_TO_NODE(host
->node_id
) *
512 priv
->bc_sspd
= max_speed
;
514 /* We'll use our maxpayload as the default mtu */
516 dev
->mtu
= min(ETH1394_DATA_LEN
,
518 (sizeof(union eth1394_hdr
) +
519 ETHER1394_GASP_OVERHEAD
)));
521 /* Set our hardware address while we're at it */
522 *(u64
*)dev
->dev_addr
= guid
;
523 *(u64
*)dev
->broadcast
= ~0x0ULL
;
526 spin_unlock_irqrestore (&priv
->lock
, flags
);
529 /* This function is called right before register_netdev */
530 static void ether1394_init_dev (struct net_device
*dev
)
533 dev
->open
= ether1394_open
;
534 dev
->stop
= ether1394_stop
;
535 dev
->hard_start_xmit
= ether1394_tx
;
536 dev
->get_stats
= ether1394_stats
;
537 dev
->tx_timeout
= ether1394_tx_timeout
;
538 dev
->change_mtu
= ether1394_change_mtu
;
540 dev
->hard_header
= ether1394_header
;
541 dev
->rebuild_header
= ether1394_rebuild_header
;
542 dev
->hard_header_cache
= ether1394_header_cache
;
543 dev
->header_cache_update
= ether1394_header_cache_update
;
544 dev
->hard_header_parse
= ether1394_header_parse
;
545 dev
->set_mac_address
= ether1394_mac_addr
;
546 SET_ETHTOOL_OPS(dev
, ðtool_ops
);
549 dev
->watchdog_timeo
= ETHER1394_TIMEOUT
;
550 dev
->flags
= IFF_BROADCAST
| IFF_MULTICAST
;
551 dev
->features
= NETIF_F_HIGHDMA
;
552 dev
->addr_len
= ETH1394_ALEN
;
553 dev
->hard_header_len
= ETH1394_HLEN
;
554 dev
->type
= ARPHRD_IEEE1394
;
556 ether1394_reset_priv (dev
, 1);
560 * This function is called every time a card is found. It is generally called
561 * when the module is installed. This is where we add all of our ethernet
562 * devices. One for each host.
564 static void ether1394_add_host (struct hpsb_host
*host
)
566 struct eth1394_host_info
*hi
= NULL
;
567 struct net_device
*dev
= NULL
;
568 struct eth1394_priv
*priv
;
569 static int version_printed
= 0;
572 if (!(host
->config_roms
& HPSB_CONFIG_ROM_ENTRY_IP1394
))
575 fifo_addr
= hpsb_allocate_and_register_addrspace(ð1394_highlevel
,
578 ETHER1394_REGION_ADDR_LEN
,
579 ETHER1394_REGION_ADDR_LEN
,
581 if (fifo_addr
== ~0ULL)
584 if (version_printed
++ == 0)
585 ETH1394_PRINT_G (KERN_INFO
, "%s\n", version
);
587 /* We should really have our own alloc_hpsbdev() function in
588 * net_init.c instead of calling the one for ethernet then hijacking
589 * it for ourselves. That way we'd be a real networking device. */
590 dev
= alloc_etherdev(sizeof (struct eth1394_priv
));
593 ETH1394_PRINT_G (KERN_ERR
, "Out of memory trying to allocate "
594 "etherdevice for IEEE 1394 device %s-%d\n",
595 host
->driver
->name
, host
->id
);
599 SET_MODULE_OWNER(dev
);
600 SET_NETDEV_DEV(dev
, &host
->device
);
602 priv
= netdev_priv(dev
);
604 INIT_LIST_HEAD(&priv
->ip_node_list
);
606 spin_lock_init(&priv
->lock
);
608 priv
->local_fifo
= fifo_addr
;
610 hi
= hpsb_create_hostinfo(ð1394_highlevel
, host
, sizeof(*hi
));
613 ETH1394_PRINT_G (KERN_ERR
, "Out of memory trying to create "
614 "hostinfo for IEEE 1394 device %s-%d\n",
615 host
->driver
->name
, host
->id
);
619 ether1394_init_dev(dev
);
621 if (register_netdev (dev
)) {
622 ETH1394_PRINT (KERN_ERR
, dev
->name
, "Error registering network driver\n");
626 ETH1394_PRINT (KERN_INFO
, dev
->name
, "IEEE-1394 IPv4 over 1394 Ethernet (fw-host%d)\n",
632 /* Ignore validity in hopes that it will be set in the future. It'll
633 * be checked when the eth device is opened. */
634 priv
->broadcast_channel
= host
->csr
.broadcast_channel
& 0x3f;
636 priv
->iso
= hpsb_iso_recv_init(host
,
637 ETHER1394_ISO_BUF_SIZE
,
638 ETHER1394_GASP_BUFFERS
,
639 priv
->broadcast_channel
,
640 HPSB_ISO_DMA_PACKET_PER_BUFFER
,
642 if (priv
->iso
== NULL
) {
643 ETH1394_PRINT(KERN_ERR
, dev
->name
,
644 "Could not allocate isochronous receive context "
645 "for the broadcast channel\n");
646 priv
->bc_state
= ETHER1394_BC_ERROR
;
648 if (hpsb_iso_recv_start(priv
->iso
, -1, (1 << 3), -1) < 0)
649 priv
->bc_state
= ETHER1394_BC_STOPPED
;
651 priv
->bc_state
= ETHER1394_BC_RUNNING
;
660 hpsb_destroy_hostinfo(ð1394_highlevel
, host
);
665 /* Remove a card from our list */
666 static void ether1394_remove_host (struct hpsb_host
*host
)
668 struct eth1394_host_info
*hi
;
670 hi
= hpsb_get_hostinfo(ð1394_highlevel
, host
);
672 struct eth1394_priv
*priv
= netdev_priv(hi
->dev
);
674 hpsb_unregister_addrspace(ð1394_highlevel
, host
,
677 if (priv
->iso
!= NULL
)
678 hpsb_iso_shutdown(priv
->iso
);
681 unregister_netdev (hi
->dev
);
682 free_netdev(hi
->dev
);
689 /* A reset has just arisen */
690 static void ether1394_host_reset (struct hpsb_host
*host
)
692 struct eth1394_host_info
*hi
;
693 struct eth1394_priv
*priv
;
694 struct net_device
*dev
;
695 struct list_head
*lh
, *n
;
696 struct eth1394_node_ref
*node
;
697 struct eth1394_node_info
*node_info
;
700 hi
= hpsb_get_hostinfo(ð1394_highlevel
, host
);
702 /* This can happen for hosts that we don't use */
707 priv
= (struct eth1394_priv
*)netdev_priv(dev
);
709 /* Reset our private host data, but not our mtu */
710 netif_stop_queue (dev
);
711 ether1394_reset_priv (dev
, 0);
713 list_for_each_entry(node
, &priv
->ip_node_list
, list
) {
714 node_info
= (struct eth1394_node_info
*)node
->ud
->device
.driver_data
;
716 spin_lock_irqsave(&node_info
->pdg
.lock
, flags
);
718 list_for_each_safe(lh
, n
, &node_info
->pdg
.list
) {
719 purge_partial_datagram(lh
);
722 INIT_LIST_HEAD(&(node_info
->pdg
.list
));
723 node_info
->pdg
.sz
= 0;
725 spin_unlock_irqrestore(&node_info
->pdg
.lock
, flags
);
728 netif_wake_queue (dev
);
731 /******************************************
732 * HW Header net device functions
733 ******************************************/
734 /* These functions have been adapted from net/ethernet/eth.c */
737 /* Create a fake MAC header for an arbitrary protocol layer.
738 * saddr=NULL means use device source address
739 * daddr=NULL means leave destination address (eg unresolved arp). */
740 static int ether1394_header(struct sk_buff
*skb
, struct net_device
*dev
,
741 unsigned short type
, void *daddr
, void *saddr
,
744 struct eth1394hdr
*eth
= (struct eth1394hdr
*)skb_push(skb
, ETH1394_HLEN
);
746 eth
->h_proto
= htons(type
);
748 if (dev
->flags
& (IFF_LOOPBACK
|IFF_NOARP
)) {
749 memset(eth
->h_dest
, 0, dev
->addr_len
);
750 return(dev
->hard_header_len
);
754 memcpy(eth
->h_dest
,daddr
,dev
->addr_len
);
755 return dev
->hard_header_len
;
758 return -dev
->hard_header_len
;
763 /* Rebuild the faked MAC header. This is called after an ARP
764 * (or in future other address resolution) has completed on this
765 * sk_buff. We now let ARP fill in the other fields.
767 * This routine CANNOT use cached dst->neigh!
768 * Really, it is used only when dst->neigh is wrong.
770 static int ether1394_rebuild_header(struct sk_buff
*skb
)
772 struct eth1394hdr
*eth
= (struct eth1394hdr
*)skb
->data
;
773 struct net_device
*dev
= skb
->dev
;
775 switch (eth
->h_proto
) {
778 case __constant_htons(ETH_P_IP
):
779 return arp_find((unsigned char*)ð
->h_dest
, skb
);
782 ETH1394_PRINT(KERN_DEBUG
, dev
->name
,
783 "unable to resolve type %04x addresses.\n",
791 static int ether1394_header_parse(struct sk_buff
*skb
, unsigned char *haddr
)
793 struct net_device
*dev
= skb
->dev
;
794 memcpy(haddr
, dev
->dev_addr
, ETH1394_ALEN
);
799 static int ether1394_header_cache(struct neighbour
*neigh
, struct hh_cache
*hh
)
801 unsigned short type
= hh
->hh_type
;
802 struct eth1394hdr
*eth
= (struct eth1394hdr
*)(((u8
*)hh
->hh_data
) +
803 (16 - ETH1394_HLEN
));
804 struct net_device
*dev
= neigh
->dev
;
806 if (type
== __constant_htons(ETH_P_802_3
)) {
811 memcpy(eth
->h_dest
, neigh
->ha
, dev
->addr_len
);
813 hh
->hh_len
= ETH1394_HLEN
;
817 /* Called by Address Resolution module to notify changes in address. */
818 static void ether1394_header_cache_update(struct hh_cache
*hh
,
819 struct net_device
*dev
,
820 unsigned char * haddr
)
822 memcpy(((u8
*)hh
->hh_data
) + (16 - ETH1394_HLEN
), haddr
, dev
->addr_len
);
825 static int ether1394_mac_addr(struct net_device
*dev
, void *p
)
827 if (netif_running(dev
))
830 /* Not going to allow setting the MAC address, we really need to use
831 * the real one supplied by the hardware */
837 /******************************************
838 * Datagram reception code
839 ******************************************/
841 /* Copied from net/ethernet/eth.c */
842 static inline u16
ether1394_type_trans(struct sk_buff
*skb
,
843 struct net_device
*dev
)
845 struct eth1394hdr
*eth
;
848 skb
->mac
.raw
= skb
->data
;
849 skb_pull (skb
, ETH1394_HLEN
);
850 eth
= eth1394_hdr(skb
);
852 if (*eth
->h_dest
& 1) {
853 if (memcmp(eth
->h_dest
, dev
->broadcast
, dev
->addr_len
)==0)
854 skb
->pkt_type
= PACKET_BROADCAST
;
857 skb
->pkt_type
= PACKET_MULTICAST
;
860 if (memcmp(eth
->h_dest
, dev
->dev_addr
, dev
->addr_len
))
861 skb
->pkt_type
= PACKET_OTHERHOST
;
864 if (ntohs (eth
->h_proto
) >= 1536)
869 if (*(unsigned short *)rawp
== 0xFFFF)
870 return htons (ETH_P_802_3
);
872 return htons (ETH_P_802_2
);
875 /* Parse an encapsulated IP1394 header into an ethernet frame packet.
876 * We also perform ARP translation here, if need be. */
877 static inline u16
ether1394_parse_encap(struct sk_buff
*skb
,
878 struct net_device
*dev
,
879 nodeid_t srcid
, nodeid_t destid
,
882 struct eth1394_priv
*priv
= netdev_priv(dev
);
884 unsigned short ret
= 0;
886 /* Setup our hw addresses. We use these to build the
887 * ethernet header. */
888 if (destid
== (LOCAL_BUS
| ALL_NODES
))
889 dest_hw
= ~0ULL; /* broadcast */
891 dest_hw
= cpu_to_be64((((u64
)priv
->host
->csr
.guid_hi
) << 32) |
892 priv
->host
->csr
.guid_lo
);
894 /* If this is an ARP packet, convert it. First, we want to make
895 * use of some of the fields, since they tell us a little bit
896 * about the sending machine. */
897 if (ether_type
== __constant_htons (ETH_P_ARP
)) {
898 struct eth1394_arp
*arp1394
= (struct eth1394_arp
*)skb
->data
;
899 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
900 unsigned char *arp_ptr
= (unsigned char *)(arp
+ 1);
901 u64 fifo_addr
= (u64
)ntohs(arp1394
->fifo_hi
) << 32 |
902 ntohl(arp1394
->fifo_lo
);
903 u8 max_rec
= min(priv
->host
->csr
.max_rec
,
904 (u8
)(arp1394
->max_rec
));
905 int sspd
= arp1394
->sspd
;
907 struct eth1394_node_ref
*node
;
908 struct eth1394_node_info
*node_info
;
910 /* Sanity check. MacOSX seems to be sending us 131 in this
911 * field (atleast on my Panther G5). Not sure why. */
912 if (sspd
> 5 || sspd
< 0)
915 maxpayload
= min(eth1394_speedto_maxpayload
[sspd
], (u16
)(1 << (max_rec
+ 1)));
917 node
= eth1394_find_node_guid(&priv
->ip_node_list
,
918 be64_to_cpu(arp1394
->s_uniq_id
));
923 node_info
= (struct eth1394_node_info
*)node
->ud
->device
.driver_data
;
925 /* Update our speed/payload/fifo_offset table */
926 node_info
->maxpayload
= maxpayload
;
927 node_info
->sspd
= sspd
;
928 node_info
->fifo
= fifo_addr
;
930 /* Now that we're done with the 1394 specific stuff, we'll
931 * need to alter some of the data. Believe it or not, all
932 * that needs to be done is sender_IP_address needs to be
933 * moved, the destination hardware address get stuffed
934 * in and the hardware address length set to 8.
936 * IMPORTANT: The code below overwrites 1394 specific data
937 * needed above so keep the munging of the data for the
938 * higher level IP stack last. */
941 arp_ptr
+= arp
->ar_hln
; /* skip over sender unique id */
942 *(u32
*)arp_ptr
= arp1394
->sip
; /* move sender IP addr */
943 arp_ptr
+= arp
->ar_pln
; /* skip over sender IP addr */
946 /* just set ARP req target unique ID to 0 */
947 *((u64
*)arp_ptr
) = 0;
949 *((u64
*)arp_ptr
) = *((u64
*)dev
->dev_addr
);
952 /* Now add the ethernet header. */
953 if (dev
->hard_header (skb
, dev
, __constant_ntohs (ether_type
),
954 &dest_hw
, NULL
, skb
->len
) >= 0)
955 ret
= ether1394_type_trans(skb
, dev
);
960 static inline int fragment_overlap(struct list_head
*frag_list
, int offset
, int len
)
962 struct fragment_info
*fi
;
964 list_for_each_entry(fi
, frag_list
, list
) {
965 if ( ! ((offset
> (fi
->offset
+ fi
->len
- 1)) ||
966 ((offset
+ len
- 1) < fi
->offset
)))
972 static inline struct list_head
*find_partial_datagram(struct list_head
*pdgl
, int dgl
)
974 struct partial_datagram
*pd
;
976 list_for_each_entry(pd
, pdgl
, list
) {
983 /* Assumes that new fragment does not overlap any existing fragments */
984 static inline int new_fragment(struct list_head
*frag_info
, int offset
, int len
)
986 struct list_head
*lh
;
987 struct fragment_info
*fi
, *fi2
, *new;
989 list_for_each(lh
, frag_info
) {
990 fi
= list_entry(lh
, struct fragment_info
, list
);
991 if ((fi
->offset
+ fi
->len
) == offset
) {
992 /* The new fragment can be tacked on to the end */
994 /* Did the new fragment plug a hole? */
995 fi2
= list_entry(lh
->next
, struct fragment_info
, list
);
996 if ((fi
->offset
+ fi
->len
) == fi2
->offset
) {
997 /* glue fragments together */
1003 } else if ((offset
+ len
) == fi
->offset
) {
1004 /* The new fragment can be tacked on to the beginning */
1005 fi
->offset
= offset
;
1007 /* Did the new fragment plug a hole? */
1008 fi2
= list_entry(lh
->prev
, struct fragment_info
, list
);
1009 if ((fi2
->offset
+ fi2
->len
) == fi
->offset
) {
1010 /* glue fragments together */
1011 fi2
->len
+= fi
->len
;
1016 } else if (offset
> (fi
->offset
+ fi
->len
)) {
1018 } else if ((offset
+ len
) < fi
->offset
) {
1024 new = kmalloc(sizeof(struct fragment_info
), GFP_ATOMIC
);
1028 new->offset
= offset
;
1031 list_add(&new->list
, lh
);
1036 static inline int new_partial_datagram(struct net_device
*dev
,
1037 struct list_head
*pdgl
, int dgl
,
1038 int dg_size
, char *frag_buf
,
1039 int frag_off
, int frag_len
)
1041 struct partial_datagram
*new;
1043 new = kmalloc(sizeof(struct partial_datagram
), GFP_ATOMIC
);
1047 INIT_LIST_HEAD(&new->frag_info
);
1049 if (new_fragment(&new->frag_info
, frag_off
, frag_len
) < 0) {
1055 new->dg_size
= dg_size
;
1057 new->skb
= dev_alloc_skb(dg_size
+ dev
->hard_header_len
+ 15);
1059 struct fragment_info
*fi
= list_entry(new->frag_info
.next
,
1060 struct fragment_info
,
1067 skb_reserve(new->skb
, (dev
->hard_header_len
+ 15) & ~15);
1068 new->pbuf
= skb_put(new->skb
, dg_size
);
1069 memcpy(new->pbuf
+ frag_off
, frag_buf
, frag_len
);
1071 list_add(&new->list
, pdgl
);
1076 static inline int update_partial_datagram(struct list_head
*pdgl
, struct list_head
*lh
,
1077 char *frag_buf
, int frag_off
, int frag_len
)
1079 struct partial_datagram
*pd
= list_entry(lh
, struct partial_datagram
, list
);
1081 if (new_fragment(&pd
->frag_info
, frag_off
, frag_len
) < 0) {
1085 memcpy(pd
->pbuf
+ frag_off
, frag_buf
, frag_len
);
1087 /* Move list entry to beginnig of list so that oldest partial
1088 * datagrams percolate to the end of the list */
1095 static inline int is_datagram_complete(struct list_head
*lh
, int dg_size
)
1097 struct partial_datagram
*pd
= list_entry(lh
, struct partial_datagram
, list
);
1098 struct fragment_info
*fi
= list_entry(pd
->frag_info
.next
,
1099 struct fragment_info
, list
);
1101 return (fi
->len
== dg_size
);
1104 /* Packet reception. We convert the IP1394 encapsulation header to an
1105 * ethernet header, and fill it with some of our other fields. This is
1106 * an incoming packet from the 1394 bus. */
1107 static int ether1394_data_handler(struct net_device
*dev
, int srcid
, int destid
,
1110 struct sk_buff
*skb
;
1111 unsigned long flags
;
1112 struct eth1394_priv
*priv
= netdev_priv(dev
);
1113 union eth1394_hdr
*hdr
= (union eth1394_hdr
*)buf
;
1114 u16 ether_type
= 0; /* initialized to clear warning */
1116 struct unit_directory
*ud
= priv
->ud_list
[NODEID_TO_NODE(srcid
)];
1117 struct eth1394_node_info
*node_info
;
1120 struct eth1394_node_ref
*node
;
1121 node
= eth1394_find_node_nodeid(&priv
->ip_node_list
, srcid
);
1123 HPSB_PRINT(KERN_ERR
, "ether1394 rx: sender nodeid "
1124 "lookup failure: " NODE_BUS_FMT
,
1125 NODE_BUS_ARGS(priv
->host
, srcid
));
1126 priv
->stats
.rx_dropped
++;
1131 priv
->ud_list
[NODEID_TO_NODE(srcid
)] = ud
;
1134 node_info
= (struct eth1394_node_info
*)ud
->device
.driver_data
;
1136 /* First, did we receive a fragmented or unfragmented datagram? */
1137 hdr
->words
.word1
= ntohs(hdr
->words
.word1
);
1139 hdr_len
= hdr_type_len
[hdr
->common
.lf
];
1141 if (hdr
->common
.lf
== ETH1394_HDR_LF_UF
) {
1142 /* An unfragmented datagram has been received by the ieee1394
1143 * bus. Build an skbuff around it so we can pass it to the
1144 * high level network layer. */
1146 skb
= dev_alloc_skb(len
+ dev
->hard_header_len
+ 15);
1148 HPSB_PRINT (KERN_ERR
, "ether1394 rx: low on mem\n");
1149 priv
->stats
.rx_dropped
++;
1152 skb_reserve(skb
, (dev
->hard_header_len
+ 15) & ~15);
1153 memcpy(skb_put(skb
, len
- hdr_len
), buf
+ hdr_len
, len
- hdr_len
);
1154 ether_type
= hdr
->uf
.ether_type
;
1156 /* A datagram fragment has been received, now the fun begins. */
1158 struct list_head
*pdgl
, *lh
;
1159 struct partial_datagram
*pd
;
1161 int fg_len
= len
- hdr_len
;
1165 struct pdg_list
*pdg
= &(node_info
->pdg
);
1167 hdr
->words
.word3
= ntohs(hdr
->words
.word3
);
1168 /* The 4th header word is reserved so no need to do ntohs() */
1170 if (hdr
->common
.lf
== ETH1394_HDR_LF_FF
) {
1171 ether_type
= hdr
->ff
.ether_type
;
1173 dg_size
= hdr
->ff
.dg_size
+ 1;
1176 hdr
->words
.word2
= ntohs(hdr
->words
.word2
);
1178 dg_size
= hdr
->sf
.dg_size
+ 1;
1179 fg_off
= hdr
->sf
.fg_off
;
1181 spin_lock_irqsave(&pdg
->lock
, flags
);
1183 pdgl
= &(pdg
->list
);
1184 lh
= find_partial_datagram(pdgl
, dgl
);
1187 while (pdg
->sz
>= max_partial_datagrams
) {
1188 /* remove the oldest */
1189 purge_partial_datagram(pdgl
->prev
);
1193 retval
= new_partial_datagram(dev
, pdgl
, dgl
, dg_size
,
1194 buf
+ hdr_len
, fg_off
,
1197 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1201 lh
= find_partial_datagram(pdgl
, dgl
);
1203 struct partial_datagram
*pd
;
1205 pd
= list_entry(lh
, struct partial_datagram
, list
);
1207 if (fragment_overlap(&pd
->frag_info
, fg_off
, fg_len
)) {
1208 /* Overlapping fragments, obliterate old
1209 * datagram and start new one. */
1210 purge_partial_datagram(lh
);
1211 retval
= new_partial_datagram(dev
, pdgl
, dgl
,
1217 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1221 retval
= update_partial_datagram(pdgl
, lh
,
1225 /* Couldn't save off fragment anyway
1226 * so might as well obliterate the
1228 purge_partial_datagram(lh
);
1230 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1233 } /* fragment overlap */
1234 } /* new datagram or add to existing one */
1236 pd
= list_entry(lh
, struct partial_datagram
, list
);
1238 if (hdr
->common
.lf
== ETH1394_HDR_LF_FF
) {
1239 pd
->ether_type
= ether_type
;
1242 if (is_datagram_complete(lh
, dg_size
)) {
1243 ether_type
= pd
->ether_type
;
1245 skb
= skb_get(pd
->skb
);
1246 purge_partial_datagram(lh
);
1247 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1249 /* Datagram is not complete, we're done for the
1251 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1254 } /* unframgented datagram or fragmented one */
1256 /* Write metadata, and then pass to the receive level */
1258 skb
->ip_summed
= CHECKSUM_UNNECESSARY
; /* don't check it */
1260 /* Parse the encapsulation header. This actually does the job of
1261 * converting to an ethernet frame header, aswell as arp
1262 * conversion if needed. ARP conversion is easier in this
1263 * direction, since we are using ethernet as our backend. */
1264 skb
->protocol
= ether1394_parse_encap(skb
, dev
, srcid
, destid
,
1268 spin_lock_irqsave(&priv
->lock
, flags
);
1269 if (!skb
->protocol
) {
1270 priv
->stats
.rx_errors
++;
1271 priv
->stats
.rx_dropped
++;
1272 dev_kfree_skb_any(skb
);
1276 if (netif_rx(skb
) == NET_RX_DROP
) {
1277 priv
->stats
.rx_errors
++;
1278 priv
->stats
.rx_dropped
++;
1283 priv
->stats
.rx_packets
++;
1284 priv
->stats
.rx_bytes
+= skb
->len
;
1287 if (netif_queue_stopped(dev
))
1288 netif_wake_queue(dev
);
1289 spin_unlock_irqrestore(&priv
->lock
, flags
);
1291 dev
->last_rx
= jiffies
;
1296 static int ether1394_write(struct hpsb_host
*host
, int srcid
, int destid
,
1297 quadlet_t
*data
, u64 addr
, size_t len
, u16 flags
)
1299 struct eth1394_host_info
*hi
;
1301 hi
= hpsb_get_hostinfo(ð1394_highlevel
, host
);
1303 ETH1394_PRINT_G(KERN_ERR
, "Could not find net device for host %s\n",
1304 host
->driver
->name
);
1305 return RCODE_ADDRESS_ERROR
;
1308 if (ether1394_data_handler(hi
->dev
, srcid
, destid
, (char*)data
, len
))
1309 return RCODE_ADDRESS_ERROR
;
1311 return RCODE_COMPLETE
;
1314 static void ether1394_iso(struct hpsb_iso
*iso
)
1318 struct eth1394_host_info
*hi
;
1319 struct net_device
*dev
;
1320 struct eth1394_priv
*priv
;
1327 hi
= hpsb_get_hostinfo(ð1394_highlevel
, iso
->host
);
1329 ETH1394_PRINT_G(KERN_ERR
, "Could not find net device for host %s\n",
1330 iso
->host
->driver
->name
);
1336 nready
= hpsb_iso_n_ready(iso
);
1337 for (i
= 0; i
< nready
; i
++) {
1338 struct hpsb_iso_packet_info
*info
=
1339 &iso
->infos
[(iso
->first_packet
+ i
) % iso
->buf_packets
];
1340 data
= (quadlet_t
*) (iso
->data_buf
.kvirt
+ info
->offset
);
1342 /* skip over GASP header */
1343 buf
= (char *)data
+ 8;
1344 len
= info
->len
- 8;
1346 specifier_id
= (((be32_to_cpu(data
[0]) & 0xffff) << 8) |
1347 ((be32_to_cpu(data
[1]) & 0xff000000) >> 24));
1348 source_id
= be32_to_cpu(data
[0]) >> 16;
1350 priv
= netdev_priv(dev
);
1352 if (info
->channel
!= (iso
->host
->csr
.broadcast_channel
& 0x3f) ||
1353 specifier_id
!= ETHER1394_GASP_SPECIFIER_ID
) {
1354 /* This packet is not for us */
1357 ether1394_data_handler(dev
, source_id
, LOCAL_BUS
| ALL_NODES
,
1361 hpsb_iso_recv_release_packets(iso
, i
);
1363 dev
->last_rx
= jiffies
;
1366 /******************************************
1367 * Datagram transmission code
1368 ******************************************/
1370 /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire
1371 * arphdr) is the same format as the ip1394 header, so they overlap. The rest
1372 * needs to be munged a bit. The remainder of the arphdr is formatted based
1373 * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to
1376 * Now that the EUI is used for the hardware address all we need to do to make
1377 * this work for 1394 is to insert 2 quadlets that contain max_rec size,
1378 * speed, and unicast FIFO address information between the sender_unique_id
1379 * and the IP addresses.
1381 static inline void ether1394_arp_to_1394arp(struct sk_buff
*skb
,
1382 struct net_device
*dev
)
1384 struct eth1394_priv
*priv
= netdev_priv(dev
);
1386 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
1387 unsigned char *arp_ptr
= (unsigned char *)(arp
+ 1);
1388 struct eth1394_arp
*arp1394
= (struct eth1394_arp
*)skb
->data
;
1390 /* Believe it or not, all that need to happen is sender IP get moved
1391 * and set hw_addr_len, max_rec, sspd, fifo_hi and fifo_lo. */
1392 arp1394
->hw_addr_len
= 16;
1393 arp1394
->sip
= *(u32
*)(arp_ptr
+ ETH1394_ALEN
);
1394 arp1394
->max_rec
= priv
->host
->csr
.max_rec
;
1395 arp1394
->sspd
= priv
->host
->csr
.lnk_spd
;
1396 arp1394
->fifo_hi
= htons (priv
->local_fifo
>> 32);
1397 arp1394
->fifo_lo
= htonl (priv
->local_fifo
& ~0x0);
1402 /* We need to encapsulate the standard header with our own. We use the
1403 * ethernet header's proto for our own. */
1404 static inline unsigned int ether1394_encapsulate_prep(unsigned int max_payload
,
1406 union eth1394_hdr
*hdr
,
1407 u16 dg_size
, u16 dgl
)
1409 unsigned int adj_max_payload
= max_payload
- hdr_type_len
[ETH1394_HDR_LF_UF
];
1411 /* Does it all fit in one packet? */
1412 if (dg_size
<= adj_max_payload
) {
1413 hdr
->uf
.lf
= ETH1394_HDR_LF_UF
;
1414 hdr
->uf
.ether_type
= proto
;
1416 hdr
->ff
.lf
= ETH1394_HDR_LF_FF
;
1417 hdr
->ff
.ether_type
= proto
;
1418 hdr
->ff
.dg_size
= dg_size
- 1;
1420 adj_max_payload
= max_payload
- hdr_type_len
[ETH1394_HDR_LF_FF
];
1422 return((dg_size
+ (adj_max_payload
- 1)) / adj_max_payload
);
1425 static inline unsigned int ether1394_encapsulate(struct sk_buff
*skb
,
1426 unsigned int max_payload
,
1427 union eth1394_hdr
*hdr
)
1429 union eth1394_hdr
*bufhdr
;
1430 int ftype
= hdr
->common
.lf
;
1431 int hdrsz
= hdr_type_len
[ftype
];
1432 unsigned int adj_max_payload
= max_payload
- hdrsz
;
1435 case ETH1394_HDR_LF_UF
:
1436 bufhdr
= (union eth1394_hdr
*)skb_push(skb
, hdrsz
);
1437 bufhdr
->words
.word1
= htons(hdr
->words
.word1
);
1438 bufhdr
->words
.word2
= hdr
->words
.word2
;
1441 case ETH1394_HDR_LF_FF
:
1442 bufhdr
= (union eth1394_hdr
*)skb_push(skb
, hdrsz
);
1443 bufhdr
->words
.word1
= htons(hdr
->words
.word1
);
1444 bufhdr
->words
.word2
= hdr
->words
.word2
;
1445 bufhdr
->words
.word3
= htons(hdr
->words
.word3
);
1446 bufhdr
->words
.word4
= 0;
1448 /* Set frag type here for future interior fragments */
1449 hdr
->common
.lf
= ETH1394_HDR_LF_IF
;
1454 hdr
->sf
.fg_off
+= adj_max_payload
;
1455 bufhdr
= (union eth1394_hdr
*)skb_pull(skb
, adj_max_payload
);
1456 if (max_payload
>= skb
->len
)
1457 hdr
->common
.lf
= ETH1394_HDR_LF_LF
;
1458 bufhdr
->words
.word1
= htons(hdr
->words
.word1
);
1459 bufhdr
->words
.word2
= htons(hdr
->words
.word2
);
1460 bufhdr
->words
.word3
= htons(hdr
->words
.word3
);
1461 bufhdr
->words
.word4
= 0;
1464 return min(max_payload
, skb
->len
);
1467 static inline struct hpsb_packet
*ether1394_alloc_common_packet(struct hpsb_host
*host
)
1469 struct hpsb_packet
*p
;
1471 p
= hpsb_alloc_packet(0);
1474 p
->generation
= get_hpsb_generation(host
);
1475 p
->type
= hpsb_async
;
1480 static inline int ether1394_prep_write_packet(struct hpsb_packet
*p
,
1481 struct hpsb_host
*host
,
1482 nodeid_t node
, u64 addr
,
1483 void * data
, int tx_len
)
1488 p
->tcode
= TCODE_WRITEB
;
1489 p
->header
[1] = (host
->node_id
<< 16) | (addr
>> 32);
1490 p
->header
[2] = addr
& 0xffffffff;
1492 p
->header_size
= 16;
1493 p
->expect_response
= 1;
1495 if (hpsb_get_tlabel(p
)) {
1496 ETH1394_PRINT_G(KERN_ERR
, "No more tlabels left while sending "
1497 "to node " NODE_BUS_FMT
"\n", NODE_BUS_ARGS(host
, node
));
1500 p
->header
[0] = (p
->node_id
<< 16) | (p
->tlabel
<< 10)
1501 | (1 << 8) | (TCODE_WRITEB
<< 4);
1503 p
->header
[3] = tx_len
<< 16;
1504 p
->data_size
= (tx_len
+ 3) & ~3;
1505 p
->data
= (quadlet_t
*)data
;
1510 static inline void ether1394_prep_gasp_packet(struct hpsb_packet
*p
,
1511 struct eth1394_priv
*priv
,
1512 struct sk_buff
*skb
, int length
)
1515 p
->tcode
= TCODE_STREAM_DATA
;
1517 p
->header
[0] = (length
<< 16) | (3 << 14)
1518 | ((priv
->broadcast_channel
) << 8)
1519 | (TCODE_STREAM_DATA
<< 4);
1520 p
->data_size
= length
;
1521 p
->data
= ((quadlet_t
*)skb
->data
) - 2;
1522 p
->data
[0] = cpu_to_be32((priv
->host
->node_id
<< 16) |
1523 ETHER1394_GASP_SPECIFIER_ID_HI
);
1524 p
->data
[1] = __constant_cpu_to_be32((ETHER1394_GASP_SPECIFIER_ID_LO
<< 24) |
1525 ETHER1394_GASP_VERSION
);
1527 /* Setting the node id to ALL_NODES (not LOCAL_BUS | ALL_NODES)
1528 * prevents hpsb_send_packet() from setting the speed to an arbitrary
1529 * value based on packet->node_id if packet->node_id is not set. */
1530 p
->node_id
= ALL_NODES
;
1531 p
->speed_code
= priv
->bc_sspd
;
1534 static inline void ether1394_free_packet(struct hpsb_packet
*packet
)
1536 if (packet
->tcode
!= TCODE_STREAM_DATA
)
1537 hpsb_free_tlabel(packet
);
1538 hpsb_free_packet(packet
);
1541 static void ether1394_complete_cb(void *__ptask
);
1543 static int ether1394_send_packet(struct packet_task
*ptask
, unsigned int tx_len
)
1545 struct eth1394_priv
*priv
= ptask
->priv
;
1546 struct hpsb_packet
*packet
= NULL
;
1548 packet
= ether1394_alloc_common_packet(priv
->host
);
1552 if (ptask
->tx_type
== ETH1394_GASP
) {
1553 int length
= tx_len
+ (2 * sizeof(quadlet_t
));
1555 ether1394_prep_gasp_packet(packet
, priv
, ptask
->skb
, length
);
1556 } else if (ether1394_prep_write_packet(packet
, priv
->host
,
1558 ptask
->addr
, ptask
->skb
->data
,
1560 hpsb_free_packet(packet
);
1564 ptask
->packet
= packet
;
1565 hpsb_set_packet_complete_task(ptask
->packet
, ether1394_complete_cb
,
1568 if (hpsb_send_packet(packet
) < 0) {
1569 ether1394_free_packet(packet
);
1577 /* Task function to be run when a datagram transmission is completed */
1578 static inline void ether1394_dg_complete(struct packet_task
*ptask
, int fail
)
1580 struct sk_buff
*skb
= ptask
->skb
;
1581 struct net_device
*dev
= skb
->dev
;
1582 struct eth1394_priv
*priv
= netdev_priv(dev
);
1583 unsigned long flags
;
1586 spin_lock_irqsave(&priv
->lock
, flags
);
1588 priv
->stats
.tx_dropped
++;
1589 priv
->stats
.tx_errors
++;
1591 priv
->stats
.tx_bytes
+= skb
->len
;
1592 priv
->stats
.tx_packets
++;
1594 spin_unlock_irqrestore(&priv
->lock
, flags
);
1596 dev_kfree_skb_any(skb
);
1597 kmem_cache_free(packet_task_cache
, ptask
);
1601 /* Callback for when a packet has been sent and the status of that packet is
1603 static void ether1394_complete_cb(void *__ptask
)
1605 struct packet_task
*ptask
= (struct packet_task
*)__ptask
;
1606 struct hpsb_packet
*packet
= ptask
->packet
;
1609 if (packet
->tcode
!= TCODE_STREAM_DATA
)
1610 fail
= hpsb_packet_success(packet
);
1612 ether1394_free_packet(packet
);
1614 ptask
->outstanding_pkts
--;
1615 if (ptask
->outstanding_pkts
> 0 && !fail
) {
1618 /* Add the encapsulation header to the fragment */
1619 tx_len
= ether1394_encapsulate(ptask
->skb
, ptask
->max_payload
,
1621 if (ether1394_send_packet(ptask
, tx_len
))
1622 ether1394_dg_complete(ptask
, 1);
1624 ether1394_dg_complete(ptask
, fail
);
1630 /* Transmit a packet (called by kernel) */
1631 static int ether1394_tx (struct sk_buff
*skb
, struct net_device
*dev
)
1633 gfp_t kmflags
= in_interrupt() ? GFP_ATOMIC
: GFP_KERNEL
;
1634 struct eth1394hdr
*eth
;
1635 struct eth1394_priv
*priv
= netdev_priv(dev
);
1637 unsigned long flags
;
1639 eth1394_tx_type tx_type
;
1641 unsigned int tx_len
;
1642 unsigned int max_payload
;
1645 struct packet_task
*ptask
;
1646 struct eth1394_node_ref
*node
;
1647 struct eth1394_node_info
*node_info
= NULL
;
1649 ptask
= kmem_cache_alloc(packet_task_cache
, kmflags
);
1650 if (ptask
== NULL
) {
1655 /* XXX Ignore this for now. Noticed that when MacOSX is the IRM,
1656 * it does not set our validity bit. We need to compensate for
1657 * that somewhere else, but not in eth1394. */
1659 if ((priv
->host
->csr
.broadcast_channel
& 0xc0000000) != 0xc0000000) {
1665 if ((skb
= skb_share_check (skb
, kmflags
)) == NULL
) {
1670 /* Get rid of the fake eth1394 header, but save a pointer */
1671 eth
= (struct eth1394hdr
*)skb
->data
;
1672 skb_pull(skb
, ETH1394_HLEN
);
1674 proto
= eth
->h_proto
;
1677 /* Set the transmission type for the packet. ARP packets and IP
1678 * broadcast packets are sent via GASP. */
1679 if (memcmp(eth
->h_dest
, dev
->broadcast
, ETH1394_ALEN
) == 0 ||
1680 proto
== __constant_htons(ETH_P_ARP
) ||
1681 (proto
== __constant_htons(ETH_P_IP
) &&
1682 IN_MULTICAST(__constant_ntohl(skb
->nh
.iph
->daddr
)))) {
1683 tx_type
= ETH1394_GASP
;
1684 dest_node
= LOCAL_BUS
| ALL_NODES
;
1685 max_payload
= priv
->bc_maxpayload
- ETHER1394_GASP_OVERHEAD
;
1686 BUG_ON(max_payload
< (512 - ETHER1394_GASP_OVERHEAD
));
1688 if (max_payload
< dg_size
+ hdr_type_len
[ETH1394_HDR_LF_UF
])
1691 node
= eth1394_find_node_guid(&priv
->ip_node_list
,
1692 be64_to_cpu(*(u64
*)eth
->h_dest
));
1697 node_info
= (struct eth1394_node_info
*)node
->ud
->device
.driver_data
;
1698 if (node_info
->fifo
== ETHER1394_INVALID_ADDR
) {
1703 dest_node
= node
->ud
->ne
->nodeid
;
1704 max_payload
= node_info
->maxpayload
;
1705 BUG_ON(max_payload
< (512 - ETHER1394_GASP_OVERHEAD
));
1707 dgl
= node_info
->dgl
;
1708 if (max_payload
< dg_size
+ hdr_type_len
[ETH1394_HDR_LF_UF
])
1710 tx_type
= ETH1394_WRREQ
;
1713 /* If this is an ARP packet, convert it */
1714 if (proto
== __constant_htons (ETH_P_ARP
))
1715 ether1394_arp_to_1394arp (skb
, dev
);
1717 ptask
->hdr
.words
.word1
= 0;
1718 ptask
->hdr
.words
.word2
= 0;
1719 ptask
->hdr
.words
.word3
= 0;
1720 ptask
->hdr
.words
.word4
= 0;
1723 ptask
->tx_type
= tx_type
;
1725 if (tx_type
!= ETH1394_GASP
) {
1728 spin_lock_irqsave(&priv
->lock
, flags
);
1729 addr
= node_info
->fifo
;
1730 spin_unlock_irqrestore(&priv
->lock
, flags
);
1733 ptask
->dest_node
= dest_node
;
1736 ptask
->tx_type
= tx_type
;
1737 ptask
->max_payload
= max_payload
;
1738 ptask
->outstanding_pkts
= ether1394_encapsulate_prep(max_payload
, proto
,
1739 &ptask
->hdr
, dg_size
,
1742 /* Add the encapsulation header to the fragment */
1743 tx_len
= ether1394_encapsulate(skb
, max_payload
, &ptask
->hdr
);
1744 dev
->trans_start
= jiffies
;
1745 if (ether1394_send_packet(ptask
, tx_len
))
1748 netif_wake_queue(dev
);
1752 kmem_cache_free(packet_task_cache
, ptask
);
1757 spin_lock_irqsave (&priv
->lock
, flags
);
1758 priv
->stats
.tx_dropped
++;
1759 priv
->stats
.tx_errors
++;
1760 spin_unlock_irqrestore (&priv
->lock
, flags
);
1762 if (netif_queue_stopped(dev
))
1763 netif_wake_queue(dev
);
1765 return 0; /* returning non-zero causes serious problems */
1768 static void ether1394_get_drvinfo(struct net_device
*dev
, struct ethtool_drvinfo
*info
)
1770 strcpy (info
->driver
, driver_name
);
1771 strcpy (info
->version
, "$Rev: 1312 $");
1772 /* FIXME XXX provide sane businfo */
1773 strcpy (info
->bus_info
, "ieee1394");
1776 static struct ethtool_ops ethtool_ops
= {
1777 .get_drvinfo
= ether1394_get_drvinfo
1780 static int __init
ether1394_init_module (void)
1782 packet_task_cache
= kmem_cache_create("packet_task", sizeof(struct packet_task
),
1785 /* Register ourselves as a highlevel driver */
1786 hpsb_register_highlevel(ð1394_highlevel
);
1788 return hpsb_register_protocol(ð1394_proto_driver
);
1791 static void __exit
ether1394_exit_module (void)
1793 hpsb_unregister_protocol(ð1394_proto_driver
);
1794 hpsb_unregister_highlevel(ð1394_highlevel
);
1795 kmem_cache_destroy(packet_task_cache
);
1798 module_init(ether1394_init_module
);
1799 module_exit(ether1394_exit_module
);