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>
51 #include <linux/netdevice.h>
52 #include <linux/inetdevice.h>
53 #include <linux/etherdevice.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 <linux/ethtool.h>
62 #include <asm/uaccess.h>
63 #include <asm/delay.h>
64 #include <asm/unaligned.h>
67 #include "config_roms.h"
70 #include "highlevel.h"
72 #include "ieee1394_core.h"
73 #include "ieee1394_hotplug.h"
74 #include "ieee1394_transactions.h"
75 #include "ieee1394_types.h"
79 #define ETH1394_PRINT_G(level, fmt, args...) \
80 printk(level "%s: " fmt, driver_name, ## args)
82 #define ETH1394_PRINT(level, dev_name, fmt, args...) \
83 printk(level "%s: %s: " fmt, driver_name, dev_name, ## args)
85 struct fragment_info
{
86 struct list_head list
;
91 struct partial_datagram
{
92 struct list_head list
;
98 struct list_head frag_info
;
102 struct list_head list
; /* partial datagram list per node */
103 unsigned int sz
; /* partial datagram list size per node */
104 spinlock_t lock
; /* partial datagram lock */
107 struct eth1394_host_info
{
108 struct hpsb_host
*host
;
109 struct net_device
*dev
;
112 struct eth1394_node_ref
{
113 struct unit_directory
*ud
;
114 struct list_head list
;
117 struct eth1394_node_info
{
118 u16 maxpayload
; /* max payload */
119 u8 sspd
; /* max speed */
120 u64 fifo
; /* FIFO address */
121 struct pdg_list pdg
; /* partial RX datagram lists */
122 int dgl
; /* outgoing datagram label */
125 static const char driver_name
[] = "eth1394";
127 static struct kmem_cache
*packet_task_cache
;
129 static struct hpsb_highlevel eth1394_highlevel
;
131 /* Use common.lf to determine header len */
132 static const int hdr_type_len
[] = {
133 sizeof(struct eth1394_uf_hdr
),
134 sizeof(struct eth1394_ff_hdr
),
135 sizeof(struct eth1394_sf_hdr
),
136 sizeof(struct eth1394_sf_hdr
)
139 /* For now, this needs to be 1500, so that XP works with us */
140 #define ETH1394_DATA_LEN ETH_DATA_LEN
142 static const u16 eth1394_speedto_maxpayload
[] = {
143 /* S100, S200, S400, S800, S1600, S3200 */
144 512, 1024, 2048, 4096, 4096, 4096
147 MODULE_AUTHOR("Ben Collins (bcollins@debian.org)");
148 MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)");
149 MODULE_LICENSE("GPL");
152 * The max_partial_datagrams parameter is the maximum number of fragmented
153 * datagrams per node that eth1394 will keep in memory. Providing an upper
154 * bound allows us to limit the amount of memory that partial datagrams
155 * consume in the event that some partial datagrams are never completed.
157 static int max_partial_datagrams
= 25;
158 module_param(max_partial_datagrams
, int, S_IRUGO
| S_IWUSR
);
159 MODULE_PARM_DESC(max_partial_datagrams
,
160 "Maximum number of partially received fragmented datagrams "
164 static int ether1394_header(struct sk_buff
*skb
, struct net_device
*dev
,
165 unsigned short type
, void *daddr
, void *saddr
,
167 static int ether1394_rebuild_header(struct sk_buff
*skb
);
168 static int ether1394_header_parse(struct sk_buff
*skb
, unsigned char *haddr
);
169 static int ether1394_header_cache(struct neighbour
*neigh
, struct hh_cache
*hh
);
170 static void ether1394_header_cache_update(struct hh_cache
*hh
,
171 struct net_device
*dev
,
172 unsigned char *haddr
);
173 static int ether1394_mac_addr(struct net_device
*dev
, void *p
);
175 static int ether1394_tx(struct sk_buff
*skb
, struct net_device
*dev
);
176 static void ether1394_iso(struct hpsb_iso
*iso
);
178 static struct ethtool_ops ethtool_ops
;
180 static int ether1394_write(struct hpsb_host
*host
, int srcid
, int destid
,
181 quadlet_t
*data
, u64 addr
, size_t len
, u16 flags
);
182 static void ether1394_add_host(struct hpsb_host
*host
);
183 static void ether1394_remove_host(struct hpsb_host
*host
);
184 static void ether1394_host_reset(struct hpsb_host
*host
);
186 /* Function for incoming 1394 packets */
187 static struct hpsb_address_ops addr_ops
= {
188 .write
= ether1394_write
,
191 /* Ieee1394 highlevel driver functions */
192 static struct hpsb_highlevel eth1394_highlevel
= {
194 .add_host
= ether1394_add_host
,
195 .remove_host
= ether1394_remove_host
,
196 .host_reset
= ether1394_host_reset
,
199 static int ether1394_recv_init(struct net_device
*dev
)
201 struct eth1394_priv
*priv
= netdev_priv(dev
);
202 unsigned int iso_buf_size
;
204 /* FIXME: rawiso limits us to PAGE_SIZE */
205 iso_buf_size
= min((unsigned int)PAGE_SIZE
,
206 2 * (1U << (priv
->host
->csr
.max_rec
+ 1)));
208 priv
->iso
= hpsb_iso_recv_init(priv
->host
,
209 ETHER1394_GASP_BUFFERS
* iso_buf_size
,
210 ETHER1394_GASP_BUFFERS
,
211 priv
->broadcast_channel
,
212 HPSB_ISO_DMA_PACKET_PER_BUFFER
,
214 if (priv
->iso
== NULL
) {
215 ETH1394_PRINT(KERN_ERR
, dev
->name
,
216 "Could not allocate isochronous receive "
217 "context for the broadcast channel\n");
218 priv
->bc_state
= ETHER1394_BC_ERROR
;
222 if (hpsb_iso_recv_start(priv
->iso
, -1, (1 << 3), -1) < 0)
223 priv
->bc_state
= ETHER1394_BC_STOPPED
;
225 priv
->bc_state
= ETHER1394_BC_RUNNING
;
229 /* This is called after an "ifup" */
230 static int ether1394_open(struct net_device
*dev
)
232 struct eth1394_priv
*priv
= netdev_priv(dev
);
235 if (priv
->bc_state
== ETHER1394_BC_ERROR
) {
236 ret
= ether1394_recv_init(dev
);
240 netif_start_queue(dev
);
244 /* This is called after an "ifdown" */
245 static int ether1394_stop(struct net_device
*dev
)
247 netif_stop_queue(dev
);
251 /* Return statistics to the caller */
252 static struct net_device_stats
*ether1394_stats(struct net_device
*dev
)
254 return &(((struct eth1394_priv
*)netdev_priv(dev
))->stats
);
257 /* FIXME: What to do if we timeout? I think a host reset is probably in order,
258 * so that's what we do. Should we increment the stat counters too? */
259 static void ether1394_tx_timeout(struct net_device
*dev
)
261 struct hpsb_host
*host
=
262 ((struct eth1394_priv
*)netdev_priv(dev
))->host
;
264 ETH1394_PRINT(KERN_ERR
, dev
->name
, "Timeout, resetting host %s\n",
266 highlevel_host_reset(host
);
267 netif_wake_queue(dev
);
270 static int ether1394_change_mtu(struct net_device
*dev
, int new_mtu
)
273 ((struct eth1394_priv
*)netdev_priv(dev
))->host
->csr
.max_rec
;
276 new_mtu
> ETH1394_DATA_LEN
||
277 new_mtu
> (1 << (max_rec
+ 1)) - sizeof(union eth1394_hdr
) -
278 ETHER1394_GASP_OVERHEAD
)
285 static void purge_partial_datagram(struct list_head
*old
)
287 struct partial_datagram
*pd
;
288 struct list_head
*lh
, *n
;
289 struct fragment_info
*fi
;
291 pd
= list_entry(old
, struct partial_datagram
, list
);
293 list_for_each_safe(lh
, n
, &pd
->frag_info
) {
294 fi
= list_entry(lh
, struct fragment_info
, list
);
303 /******************************************
304 * 1394 bus activity functions
305 ******************************************/
307 static struct eth1394_node_ref
*eth1394_find_node(struct list_head
*inl
,
308 struct unit_directory
*ud
)
310 struct eth1394_node_ref
*node
;
312 list_for_each_entry(node
, inl
, list
)
319 static struct eth1394_node_ref
*eth1394_find_node_guid(struct list_head
*inl
,
322 struct eth1394_node_ref
*node
;
324 list_for_each_entry(node
, inl
, list
)
325 if (node
->ud
->ne
->guid
== guid
)
331 static struct eth1394_node_ref
*eth1394_find_node_nodeid(struct list_head
*inl
,
334 struct eth1394_node_ref
*node
;
336 list_for_each_entry(node
, inl
, list
)
337 if (node
->ud
->ne
->nodeid
== nodeid
)
343 static int eth1394_new_node(struct eth1394_host_info
*hi
,
344 struct unit_directory
*ud
)
346 struct eth1394_priv
*priv
;
347 struct eth1394_node_ref
*new_node
;
348 struct eth1394_node_info
*node_info
;
350 new_node
= kmalloc(sizeof(*new_node
), GFP_KERNEL
);
354 node_info
= kmalloc(sizeof(*node_info
), GFP_KERNEL
);
360 spin_lock_init(&node_info
->pdg
.lock
);
361 INIT_LIST_HEAD(&node_info
->pdg
.list
);
362 node_info
->pdg
.sz
= 0;
363 node_info
->fifo
= CSR1212_INVALID_ADDR_SPACE
;
365 ud
->device
.driver_data
= node_info
;
368 priv
= netdev_priv(hi
->dev
);
369 list_add_tail(&new_node
->list
, &priv
->ip_node_list
);
373 static int eth1394_probe(struct device
*dev
)
375 struct unit_directory
*ud
;
376 struct eth1394_host_info
*hi
;
378 ud
= container_of(dev
, struct unit_directory
, device
);
379 hi
= hpsb_get_hostinfo(ð1394_highlevel
, ud
->ne
->host
);
383 return eth1394_new_node(hi
, ud
);
386 static int eth1394_remove(struct device
*dev
)
388 struct unit_directory
*ud
;
389 struct eth1394_host_info
*hi
;
390 struct eth1394_priv
*priv
;
391 struct eth1394_node_ref
*old_node
;
392 struct eth1394_node_info
*node_info
;
393 struct list_head
*lh
, *n
;
396 ud
= container_of(dev
, struct unit_directory
, device
);
397 hi
= hpsb_get_hostinfo(ð1394_highlevel
, ud
->ne
->host
);
401 priv
= netdev_priv(hi
->dev
);
403 old_node
= eth1394_find_node(&priv
->ip_node_list
, ud
);
407 list_del(&old_node
->list
);
410 node_info
= (struct eth1394_node_info
*)ud
->device
.driver_data
;
412 spin_lock_irqsave(&node_info
->pdg
.lock
, flags
);
413 /* The partial datagram list should be empty, but we'll just
414 * make sure anyway... */
415 list_for_each_safe(lh
, n
, &node_info
->pdg
.list
)
416 purge_partial_datagram(lh
);
417 spin_unlock_irqrestore(&node_info
->pdg
.lock
, flags
);
420 ud
->device
.driver_data
= NULL
;
424 static int eth1394_update(struct unit_directory
*ud
)
426 struct eth1394_host_info
*hi
;
427 struct eth1394_priv
*priv
;
428 struct eth1394_node_ref
*node
;
430 hi
= hpsb_get_hostinfo(ð1394_highlevel
, ud
->ne
->host
);
434 priv
= netdev_priv(hi
->dev
);
435 node
= eth1394_find_node(&priv
->ip_node_list
, ud
);
439 return eth1394_new_node(hi
, ud
);
442 static struct ieee1394_device_id eth1394_id_table
[] = {
444 .match_flags
= (IEEE1394_MATCH_SPECIFIER_ID
|
445 IEEE1394_MATCH_VERSION
),
446 .specifier_id
= ETHER1394_GASP_SPECIFIER_ID
,
447 .version
= ETHER1394_GASP_VERSION
,
452 MODULE_DEVICE_TABLE(ieee1394
, eth1394_id_table
);
454 static struct hpsb_protocol_driver eth1394_proto_driver
= {
456 .id_table
= eth1394_id_table
,
457 .update
= eth1394_update
,
459 .probe
= eth1394_probe
,
460 .remove
= eth1394_remove
,
464 static void ether1394_reset_priv(struct net_device
*dev
, int set_mtu
)
468 struct eth1394_priv
*priv
= netdev_priv(dev
);
469 struct hpsb_host
*host
= priv
->host
;
470 u64 guid
= get_unaligned((u64
*)&(host
->csr
.rom
->bus_info_data
[3]));
471 int max_speed
= IEEE1394_SPEED_MAX
;
473 spin_lock_irqsave(&priv
->lock
, flags
);
475 memset(priv
->ud_list
, 0, sizeof(struct node_entry
*) * ALL_NODES
);
476 priv
->bc_maxpayload
= 512;
478 /* Determine speed limit */
479 for (i
= 0; i
< host
->node_count
; i
++)
480 if (max_speed
> host
->speed
[i
])
481 max_speed
= host
->speed
[i
];
482 priv
->bc_sspd
= max_speed
;
484 /* We'll use our maximum payload as the default MTU */
486 int max_payload
= 1 << (host
->csr
.max_rec
+ 1);
488 dev
->mtu
= min(ETH1394_DATA_LEN
,
489 (int)(max_payload
- sizeof(union eth1394_hdr
) -
490 ETHER1394_GASP_OVERHEAD
));
492 /* Set our hardware address while we're at it */
493 memcpy(dev
->dev_addr
, &guid
, sizeof(u64
));
494 memset(dev
->broadcast
, 0xff, sizeof(u64
));
497 spin_unlock_irqrestore(&priv
->lock
, flags
);
500 /* This function is called right before register_netdev */
501 static void ether1394_init_dev(struct net_device
*dev
)
504 dev
->open
= ether1394_open
;
505 dev
->stop
= ether1394_stop
;
506 dev
->hard_start_xmit
= ether1394_tx
;
507 dev
->get_stats
= ether1394_stats
;
508 dev
->tx_timeout
= ether1394_tx_timeout
;
509 dev
->change_mtu
= ether1394_change_mtu
;
511 dev
->hard_header
= ether1394_header
;
512 dev
->rebuild_header
= ether1394_rebuild_header
;
513 dev
->hard_header_cache
= ether1394_header_cache
;
514 dev
->header_cache_update
= ether1394_header_cache_update
;
515 dev
->hard_header_parse
= ether1394_header_parse
;
516 dev
->set_mac_address
= ether1394_mac_addr
;
517 SET_ETHTOOL_OPS(dev
, ðtool_ops
);
520 dev
->watchdog_timeo
= ETHER1394_TIMEOUT
;
521 dev
->flags
= IFF_BROADCAST
| IFF_MULTICAST
;
522 dev
->features
= NETIF_F_HIGHDMA
;
523 dev
->addr_len
= ETH1394_ALEN
;
524 dev
->hard_header_len
= ETH1394_HLEN
;
525 dev
->type
= ARPHRD_IEEE1394
;
527 ether1394_reset_priv(dev
, 1);
531 * This function is called every time a card is found. It is generally called
532 * when the module is installed. This is where we add all of our ethernet
533 * devices. One for each host.
535 static void ether1394_add_host(struct hpsb_host
*host
)
537 struct eth1394_host_info
*hi
= NULL
;
538 struct net_device
*dev
= NULL
;
539 struct eth1394_priv
*priv
;
542 if (hpsb_config_rom_ip1394_add(host
) != 0) {
543 ETH1394_PRINT_G(KERN_ERR
, "Can't add IP-over-1394 ROM entry\n");
547 fifo_addr
= hpsb_allocate_and_register_addrspace(
548 ð1394_highlevel
, host
, &addr_ops
,
549 ETHER1394_REGION_ADDR_LEN
, ETHER1394_REGION_ADDR_LEN
,
550 CSR1212_INVALID_ADDR_SPACE
, CSR1212_INVALID_ADDR_SPACE
);
551 if (fifo_addr
== CSR1212_INVALID_ADDR_SPACE
) {
552 ETH1394_PRINT_G(KERN_ERR
, "Cannot register CSR space\n");
553 hpsb_config_rom_ip1394_remove(host
);
557 /* We should really have our own alloc_hpsbdev() function in
558 * net_init.c instead of calling the one for ethernet then hijacking
559 * it for ourselves. That way we'd be a real networking device. */
560 dev
= alloc_etherdev(sizeof (struct eth1394_priv
));
563 ETH1394_PRINT_G (KERN_ERR
, "Out of memory trying to allocate "
564 "etherdevice for IEEE 1394 device %s-%d\n",
565 host
->driver
->name
, host
->id
);
569 SET_MODULE_OWNER(dev
);
571 /* FIXME - Is this the correct parent device anyway? */
572 SET_NETDEV_DEV(dev
, &host
->device
);
575 priv
= netdev_priv(dev
);
577 INIT_LIST_HEAD(&priv
->ip_node_list
);
579 spin_lock_init(&priv
->lock
);
581 priv
->local_fifo
= fifo_addr
;
583 hi
= hpsb_create_hostinfo(ð1394_highlevel
, host
, sizeof(*hi
));
586 ETH1394_PRINT_G (KERN_ERR
, "Out of memory trying to create "
587 "hostinfo for IEEE 1394 device %s-%d\n",
588 host
->driver
->name
, host
->id
);
592 ether1394_init_dev(dev
);
594 if (register_netdev (dev
)) {
595 ETH1394_PRINT (KERN_ERR
, dev
->name
, "Error registering network driver\n");
599 ETH1394_PRINT (KERN_INFO
, dev
->name
, "IEEE-1394 IPv4 over 1394 Ethernet (fw-host%d)\n",
605 /* Ignore validity in hopes that it will be set in the future. It'll
606 * be checked when the eth device is opened. */
607 priv
->broadcast_channel
= host
->csr
.broadcast_channel
& 0x3f;
609 ether1394_recv_init(dev
);
615 hpsb_destroy_hostinfo(ð1394_highlevel
, host
);
616 hpsb_unregister_addrspace(ð1394_highlevel
, host
, fifo_addr
);
617 hpsb_config_rom_ip1394_remove(host
);
620 /* Remove a card from our list */
621 static void ether1394_remove_host(struct hpsb_host
*host
)
623 struct eth1394_host_info
*hi
;
624 struct eth1394_priv
*priv
;
626 hi
= hpsb_get_hostinfo(ð1394_highlevel
, host
);
629 priv
= netdev_priv(hi
->dev
);
630 hpsb_unregister_addrspace(ð1394_highlevel
, host
, priv
->local_fifo
);
631 hpsb_config_rom_ip1394_remove(host
);
633 hpsb_iso_shutdown(priv
->iso
);
634 unregister_netdev(hi
->dev
);
635 free_netdev(hi
->dev
);
638 /* A bus reset happened */
639 static void ether1394_host_reset(struct hpsb_host
*host
)
641 struct eth1394_host_info
*hi
;
642 struct eth1394_priv
*priv
;
643 struct net_device
*dev
;
644 struct list_head
*lh
, *n
;
645 struct eth1394_node_ref
*node
;
646 struct eth1394_node_info
*node_info
;
649 hi
= hpsb_get_hostinfo(ð1394_highlevel
, host
);
651 /* This can happen for hosts that we don't use */
656 priv
= netdev_priv(dev
);
658 /* Reset our private host data, but not our MTU */
659 netif_stop_queue(dev
);
660 ether1394_reset_priv(dev
, 0);
662 list_for_each_entry(node
, &priv
->ip_node_list
, list
) {
663 node_info
= node
->ud
->device
.driver_data
;
665 spin_lock_irqsave(&node_info
->pdg
.lock
, flags
);
667 list_for_each_safe(lh
, n
, &node_info
->pdg
.list
)
668 purge_partial_datagram(lh
);
670 INIT_LIST_HEAD(&(node_info
->pdg
.list
));
671 node_info
->pdg
.sz
= 0;
673 spin_unlock_irqrestore(&node_info
->pdg
.lock
, flags
);
676 netif_wake_queue(dev
);
679 /******************************************
680 * HW Header net device functions
681 ******************************************/
682 /* These functions have been adapted from net/ethernet/eth.c */
684 /* Create a fake MAC header for an arbitrary protocol layer.
685 * saddr=NULL means use device source address
686 * daddr=NULL means leave destination address (eg unresolved arp). */
687 static int ether1394_header(struct sk_buff
*skb
, struct net_device
*dev
,
688 unsigned short type
, void *daddr
, void *saddr
,
691 struct eth1394hdr
*eth
=
692 (struct eth1394hdr
*)skb_push(skb
, ETH1394_HLEN
);
694 eth
->h_proto
= htons(type
);
696 if (dev
->flags
& (IFF_LOOPBACK
| IFF_NOARP
)) {
697 memset(eth
->h_dest
, 0, dev
->addr_len
);
698 return dev
->hard_header_len
;
702 memcpy(eth
->h_dest
, daddr
, dev
->addr_len
);
703 return dev
->hard_header_len
;
706 return -dev
->hard_header_len
;
709 /* Rebuild the faked MAC header. This is called after an ARP
710 * (or in future other address resolution) has completed on this
711 * sk_buff. We now let ARP fill in the other fields.
713 * This routine CANNOT use cached dst->neigh!
714 * Really, it is used only when dst->neigh is wrong.
716 static int ether1394_rebuild_header(struct sk_buff
*skb
)
718 struct eth1394hdr
*eth
= (struct eth1394hdr
*)skb
->data
;
719 struct net_device
*dev
= skb
->dev
;
721 switch (eth
->h_proto
) {
724 case __constant_htons(ETH_P_IP
):
725 return arp_find((unsigned char *)ð
->h_dest
, skb
);
728 ETH1394_PRINT(KERN_DEBUG
, dev
->name
,
729 "unable to resolve type %04x addresses.\n",
730 ntohs(eth
->h_proto
));
737 static int ether1394_header_parse(struct sk_buff
*skb
, unsigned char *haddr
)
739 struct net_device
*dev
= skb
->dev
;
741 memcpy(haddr
, dev
->dev_addr
, ETH1394_ALEN
);
745 static int ether1394_header_cache(struct neighbour
*neigh
, struct hh_cache
*hh
)
747 unsigned short type
= hh
->hh_type
;
748 struct net_device
*dev
= neigh
->dev
;
749 struct eth1394hdr
*eth
=
750 (struct eth1394hdr
*)((u8
*)hh
->hh_data
+ 16 - ETH1394_HLEN
);
752 if (type
== htons(ETH_P_802_3
))
756 memcpy(eth
->h_dest
, neigh
->ha
, dev
->addr_len
);
758 hh
->hh_len
= ETH1394_HLEN
;
762 /* Called by Address Resolution module to notify changes in address. */
763 static void ether1394_header_cache_update(struct hh_cache
*hh
,
764 struct net_device
*dev
,
765 unsigned char * haddr
)
767 memcpy((u8
*)hh
->hh_data
+ 16 - ETH1394_HLEN
, haddr
, dev
->addr_len
);
770 static int ether1394_mac_addr(struct net_device
*dev
, void *p
)
772 if (netif_running(dev
))
775 /* Not going to allow setting the MAC address, we really need to use
776 * the real one supplied by the hardware */
780 /******************************************
781 * Datagram reception code
782 ******************************************/
784 /* Copied from net/ethernet/eth.c */
785 static u16
ether1394_type_trans(struct sk_buff
*skb
, struct net_device
*dev
)
787 struct eth1394hdr
*eth
;
790 skb_reset_mac_header(skb
);
791 skb_pull(skb
, ETH1394_HLEN
);
792 eth
= eth1394_hdr(skb
);
794 if (*eth
->h_dest
& 1) {
795 if (memcmp(eth
->h_dest
, dev
->broadcast
, dev
->addr_len
) == 0)
796 skb
->pkt_type
= PACKET_BROADCAST
;
799 skb
->pkt_type
= PACKET_MULTICAST
;
802 if (memcmp(eth
->h_dest
, dev
->dev_addr
, dev
->addr_len
))
803 skb
->pkt_type
= PACKET_OTHERHOST
;
806 if (ntohs(eth
->h_proto
) >= 1536)
811 if (*(unsigned short *)rawp
== 0xFFFF)
812 return htons(ETH_P_802_3
);
814 return htons(ETH_P_802_2
);
817 /* Parse an encapsulated IP1394 header into an ethernet frame packet.
818 * We also perform ARP translation here, if need be. */
819 static u16
ether1394_parse_encap(struct sk_buff
*skb
, struct net_device
*dev
,
820 nodeid_t srcid
, nodeid_t destid
,
823 struct eth1394_priv
*priv
= netdev_priv(dev
);
825 unsigned short ret
= 0;
827 /* Setup our hw addresses. We use these to build the ethernet header. */
828 if (destid
== (LOCAL_BUS
| ALL_NODES
))
829 dest_hw
= ~0ULL; /* broadcast */
831 dest_hw
= cpu_to_be64((u64
)priv
->host
->csr
.guid_hi
<< 32 |
832 priv
->host
->csr
.guid_lo
);
834 /* If this is an ARP packet, convert it. First, we want to make
835 * use of some of the fields, since they tell us a little bit
836 * about the sending machine. */
837 if (ether_type
== htons(ETH_P_ARP
)) {
838 struct eth1394_arp
*arp1394
= (struct eth1394_arp
*)skb
->data
;
839 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
840 unsigned char *arp_ptr
= (unsigned char *)(arp
+ 1);
841 u64 fifo_addr
= (u64
)ntohs(arp1394
->fifo_hi
) << 32 |
842 ntohl(arp1394
->fifo_lo
);
843 u8 max_rec
= min(priv
->host
->csr
.max_rec
,
844 (u8
)(arp1394
->max_rec
));
845 int sspd
= arp1394
->sspd
;
847 struct eth1394_node_ref
*node
;
848 struct eth1394_node_info
*node_info
;
851 /* Sanity check. MacOSX seems to be sending us 131 in this
852 * field (atleast on my Panther G5). Not sure why. */
853 if (sspd
> 5 || sspd
< 0)
856 maxpayload
= min(eth1394_speedto_maxpayload
[sspd
],
857 (u16
)(1 << (max_rec
+ 1)));
859 guid
= get_unaligned(&arp1394
->s_uniq_id
);
860 node
= eth1394_find_node_guid(&priv
->ip_node_list
,
866 (struct eth1394_node_info
*)node
->ud
->device
.driver_data
;
868 /* Update our speed/payload/fifo_offset table */
869 node_info
->maxpayload
= maxpayload
;
870 node_info
->sspd
= sspd
;
871 node_info
->fifo
= fifo_addr
;
873 /* Now that we're done with the 1394 specific stuff, we'll
874 * need to alter some of the data. Believe it or not, all
875 * that needs to be done is sender_IP_address needs to be
876 * moved, the destination hardware address get stuffed
877 * in and the hardware address length set to 8.
879 * IMPORTANT: The code below overwrites 1394 specific data
880 * needed above so keep the munging of the data for the
881 * higher level IP stack last. */
884 arp_ptr
+= arp
->ar_hln
; /* skip over sender unique id */
885 *(u32
*)arp_ptr
= arp1394
->sip
; /* move sender IP addr */
886 arp_ptr
+= arp
->ar_pln
; /* skip over sender IP addr */
888 if (arp
->ar_op
== htons(ARPOP_REQUEST
))
889 memset(arp_ptr
, 0, sizeof(u64
));
891 memcpy(arp_ptr
, dev
->dev_addr
, sizeof(u64
));
894 /* Now add the ethernet header. */
895 if (dev
->hard_header(skb
, dev
, ntohs(ether_type
), &dest_hw
, NULL
,
897 ret
= ether1394_type_trans(skb
, dev
);
902 static int fragment_overlap(struct list_head
*frag_list
, int offset
, int len
)
904 struct fragment_info
*fi
;
906 list_for_each_entry(fi
, frag_list
, list
) {
907 if ( ! ((offset
> (fi
->offset
+ fi
->len
- 1)) ||
908 ((offset
+ len
- 1) < fi
->offset
)))
914 static struct list_head
*find_partial_datagram(struct list_head
*pdgl
, int dgl
)
916 struct partial_datagram
*pd
;
918 list_for_each_entry(pd
, pdgl
, list
)
925 /* Assumes that new fragment does not overlap any existing fragments */
926 static int new_fragment(struct list_head
*frag_info
, int offset
, int len
)
928 struct list_head
*lh
;
929 struct fragment_info
*fi
, *fi2
, *new;
931 list_for_each(lh
, frag_info
) {
932 fi
= list_entry(lh
, struct fragment_info
, list
);
933 if (fi
->offset
+ fi
->len
== offset
) {
934 /* The new fragment can be tacked on to the end */
936 /* Did the new fragment plug a hole? */
937 fi2
= list_entry(lh
->next
, struct fragment_info
, list
);
938 if (fi
->offset
+ fi
->len
== fi2
->offset
) {
939 /* glue fragments together */
945 } else if (offset
+ len
== fi
->offset
) {
946 /* The new fragment can be tacked on to the beginning */
949 /* Did the new fragment plug a hole? */
950 fi2
= list_entry(lh
->prev
, struct fragment_info
, list
);
951 if (fi2
->offset
+ fi2
->len
== fi
->offset
) {
952 /* glue fragments together */
958 } else if (offset
> fi
->offset
+ fi
->len
) {
960 } else if (offset
+ len
< fi
->offset
) {
966 new = kmalloc(sizeof(*new), GFP_ATOMIC
);
970 new->offset
= offset
;
973 list_add(&new->list
, lh
);
977 static int new_partial_datagram(struct net_device
*dev
, struct list_head
*pdgl
,
978 int dgl
, int dg_size
, char *frag_buf
,
979 int frag_off
, int frag_len
)
981 struct partial_datagram
*new;
983 new = kmalloc(sizeof(*new), GFP_ATOMIC
);
987 INIT_LIST_HEAD(&new->frag_info
);
989 if (new_fragment(&new->frag_info
, frag_off
, frag_len
) < 0) {
995 new->dg_size
= dg_size
;
997 new->skb
= dev_alloc_skb(dg_size
+ dev
->hard_header_len
+ 15);
999 struct fragment_info
*fi
= list_entry(new->frag_info
.next
,
1000 struct fragment_info
,
1007 skb_reserve(new->skb
, (dev
->hard_header_len
+ 15) & ~15);
1008 new->pbuf
= skb_put(new->skb
, dg_size
);
1009 memcpy(new->pbuf
+ frag_off
, frag_buf
, frag_len
);
1011 list_add(&new->list
, pdgl
);
1015 static int update_partial_datagram(struct list_head
*pdgl
, struct list_head
*lh
,
1016 char *frag_buf
, int frag_off
, int frag_len
)
1018 struct partial_datagram
*pd
=
1019 list_entry(lh
, struct partial_datagram
, list
);
1021 if (new_fragment(&pd
->frag_info
, frag_off
, frag_len
) < 0)
1024 memcpy(pd
->pbuf
+ frag_off
, frag_buf
, frag_len
);
1026 /* Move list entry to beginnig of list so that oldest partial
1027 * datagrams percolate to the end of the list */
1028 list_move(lh
, pdgl
);
1032 static int is_datagram_complete(struct list_head
*lh
, int dg_size
)
1034 struct partial_datagram
*pd
;
1035 struct fragment_info
*fi
;
1037 pd
= list_entry(lh
, struct partial_datagram
, list
);
1038 fi
= list_entry(pd
->frag_info
.next
, struct fragment_info
, list
);
1040 return (fi
->len
== dg_size
);
1043 /* Packet reception. We convert the IP1394 encapsulation header to an
1044 * ethernet header, and fill it with some of our other fields. This is
1045 * an incoming packet from the 1394 bus. */
1046 static int ether1394_data_handler(struct net_device
*dev
, int srcid
, int destid
,
1049 struct sk_buff
*skb
;
1050 unsigned long flags
;
1051 struct eth1394_priv
*priv
= netdev_priv(dev
);
1052 union eth1394_hdr
*hdr
= (union eth1394_hdr
*)buf
;
1053 u16 ether_type
= 0; /* initialized to clear warning */
1055 struct unit_directory
*ud
= priv
->ud_list
[NODEID_TO_NODE(srcid
)];
1056 struct eth1394_node_info
*node_info
;
1059 struct eth1394_node_ref
*node
;
1060 node
= eth1394_find_node_nodeid(&priv
->ip_node_list
, srcid
);
1062 HPSB_PRINT(KERN_ERR
, "ether1394 rx: sender nodeid "
1063 "lookup failure: " NODE_BUS_FMT
,
1064 NODE_BUS_ARGS(priv
->host
, srcid
));
1065 priv
->stats
.rx_dropped
++;
1070 priv
->ud_list
[NODEID_TO_NODE(srcid
)] = ud
;
1073 node_info
= (struct eth1394_node_info
*)ud
->device
.driver_data
;
1075 /* First, did we receive a fragmented or unfragmented datagram? */
1076 hdr
->words
.word1
= ntohs(hdr
->words
.word1
);
1078 hdr_len
= hdr_type_len
[hdr
->common
.lf
];
1080 if (hdr
->common
.lf
== ETH1394_HDR_LF_UF
) {
1081 /* An unfragmented datagram has been received by the ieee1394
1082 * bus. Build an skbuff around it so we can pass it to the
1083 * high level network layer. */
1085 skb
= dev_alloc_skb(len
+ dev
->hard_header_len
+ 15);
1087 HPSB_PRINT (KERN_ERR
, "ether1394 rx: low on mem\n");
1088 priv
->stats
.rx_dropped
++;
1091 skb_reserve(skb
, (dev
->hard_header_len
+ 15) & ~15);
1092 memcpy(skb_put(skb
, len
- hdr_len
), buf
+ hdr_len
,
1094 ether_type
= hdr
->uf
.ether_type
;
1096 /* A datagram fragment has been received, now the fun begins. */
1098 struct list_head
*pdgl
, *lh
;
1099 struct partial_datagram
*pd
;
1101 int fg_len
= len
- hdr_len
;
1105 struct pdg_list
*pdg
= &(node_info
->pdg
);
1107 hdr
->words
.word3
= ntohs(hdr
->words
.word3
);
1108 /* The 4th header word is reserved so no need to do ntohs() */
1110 if (hdr
->common
.lf
== ETH1394_HDR_LF_FF
) {
1111 ether_type
= hdr
->ff
.ether_type
;
1113 dg_size
= hdr
->ff
.dg_size
+ 1;
1116 hdr
->words
.word2
= ntohs(hdr
->words
.word2
);
1118 dg_size
= hdr
->sf
.dg_size
+ 1;
1119 fg_off
= hdr
->sf
.fg_off
;
1121 spin_lock_irqsave(&pdg
->lock
, flags
);
1123 pdgl
= &(pdg
->list
);
1124 lh
= find_partial_datagram(pdgl
, dgl
);
1127 while (pdg
->sz
>= max_partial_datagrams
) {
1128 /* remove the oldest */
1129 purge_partial_datagram(pdgl
->prev
);
1133 retval
= new_partial_datagram(dev
, pdgl
, dgl
, dg_size
,
1134 buf
+ hdr_len
, fg_off
,
1137 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1141 lh
= find_partial_datagram(pdgl
, dgl
);
1143 struct partial_datagram
*pd
;
1145 pd
= list_entry(lh
, struct partial_datagram
, list
);
1147 if (fragment_overlap(&pd
->frag_info
, fg_off
, fg_len
)) {
1148 /* Overlapping fragments, obliterate old
1149 * datagram and start new one. */
1150 purge_partial_datagram(lh
);
1151 retval
= new_partial_datagram(dev
, pdgl
, dgl
,
1157 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1161 retval
= update_partial_datagram(pdgl
, lh
,
1165 /* Couldn't save off fragment anyway
1166 * so might as well obliterate the
1168 purge_partial_datagram(lh
);
1170 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1173 } /* fragment overlap */
1174 } /* new datagram or add to existing one */
1176 pd
= list_entry(lh
, struct partial_datagram
, list
);
1178 if (hdr
->common
.lf
== ETH1394_HDR_LF_FF
)
1179 pd
->ether_type
= ether_type
;
1181 if (is_datagram_complete(lh
, dg_size
)) {
1182 ether_type
= pd
->ether_type
;
1184 skb
= skb_get(pd
->skb
);
1185 purge_partial_datagram(lh
);
1186 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1188 /* Datagram is not complete, we're done for the
1190 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1193 } /* unframgented datagram or fragmented one */
1195 /* Write metadata, and then pass to the receive level */
1197 skb
->ip_summed
= CHECKSUM_UNNECESSARY
; /* don't check it */
1199 /* Parse the encapsulation header. This actually does the job of
1200 * converting to an ethernet frame header, aswell as arp
1201 * conversion if needed. ARP conversion is easier in this
1202 * direction, since we are using ethernet as our backend. */
1203 skb
->protocol
= ether1394_parse_encap(skb
, dev
, srcid
, destid
,
1206 spin_lock_irqsave(&priv
->lock
, flags
);
1208 if (!skb
->protocol
) {
1209 priv
->stats
.rx_errors
++;
1210 priv
->stats
.rx_dropped
++;
1211 dev_kfree_skb_any(skb
);
1215 if (netif_rx(skb
) == NET_RX_DROP
) {
1216 priv
->stats
.rx_errors
++;
1217 priv
->stats
.rx_dropped
++;
1222 priv
->stats
.rx_packets
++;
1223 priv
->stats
.rx_bytes
+= skb
->len
;
1226 if (netif_queue_stopped(dev
))
1227 netif_wake_queue(dev
);
1228 spin_unlock_irqrestore(&priv
->lock
, flags
);
1230 dev
->last_rx
= jiffies
;
1235 static int ether1394_write(struct hpsb_host
*host
, int srcid
, int destid
,
1236 quadlet_t
*data
, u64 addr
, size_t len
, u16 flags
)
1238 struct eth1394_host_info
*hi
;
1240 hi
= hpsb_get_hostinfo(ð1394_highlevel
, host
);
1242 ETH1394_PRINT_G(KERN_ERR
, "Could not find net device for host %s\n",
1243 host
->driver
->name
);
1244 return RCODE_ADDRESS_ERROR
;
1247 if (ether1394_data_handler(hi
->dev
, srcid
, destid
, (char*)data
, len
))
1248 return RCODE_ADDRESS_ERROR
;
1250 return RCODE_COMPLETE
;
1253 static void ether1394_iso(struct hpsb_iso
*iso
)
1257 struct eth1394_host_info
*hi
;
1258 struct net_device
*dev
;
1259 struct eth1394_priv
*priv
;
1266 hi
= hpsb_get_hostinfo(ð1394_highlevel
, iso
->host
);
1268 ETH1394_PRINT_G(KERN_ERR
, "Could not find net device for host %s\n",
1269 iso
->host
->driver
->name
);
1275 nready
= hpsb_iso_n_ready(iso
);
1276 for (i
= 0; i
< nready
; i
++) {
1277 struct hpsb_iso_packet_info
*info
=
1278 &iso
->infos
[(iso
->first_packet
+ i
) % iso
->buf_packets
];
1279 data
= (quadlet_t
*)(iso
->data_buf
.kvirt
+ info
->offset
);
1281 /* skip over GASP header */
1282 buf
= (char *)data
+ 8;
1283 len
= info
->len
- 8;
1285 specifier_id
= (be32_to_cpu(data
[0]) & 0xffff) << 8 |
1286 (be32_to_cpu(data
[1]) & 0xff000000) >> 24;
1287 source_id
= be32_to_cpu(data
[0]) >> 16;
1289 priv
= netdev_priv(dev
);
1291 if (info
->channel
!= (iso
->host
->csr
.broadcast_channel
& 0x3f)
1292 || specifier_id
!= ETHER1394_GASP_SPECIFIER_ID
) {
1293 /* This packet is not for us */
1296 ether1394_data_handler(dev
, source_id
, LOCAL_BUS
| ALL_NODES
,
1300 hpsb_iso_recv_release_packets(iso
, i
);
1302 dev
->last_rx
= jiffies
;
1305 /******************************************
1306 * Datagram transmission code
1307 ******************************************/
1309 /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire
1310 * arphdr) is the same format as the ip1394 header, so they overlap. The rest
1311 * needs to be munged a bit. The remainder of the arphdr is formatted based
1312 * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to
1315 * Now that the EUI is used for the hardware address all we need to do to make
1316 * this work for 1394 is to insert 2 quadlets that contain max_rec size,
1317 * speed, and unicast FIFO address information between the sender_unique_id
1318 * and the IP addresses.
1320 static void ether1394_arp_to_1394arp(struct sk_buff
*skb
,
1321 struct net_device
*dev
)
1323 struct eth1394_priv
*priv
= netdev_priv(dev
);
1324 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
1325 unsigned char *arp_ptr
= (unsigned char *)(arp
+ 1);
1326 struct eth1394_arp
*arp1394
= (struct eth1394_arp
*)skb
->data
;
1328 arp1394
->hw_addr_len
= 16;
1329 arp1394
->sip
= *(u32
*)(arp_ptr
+ ETH1394_ALEN
);
1330 arp1394
->max_rec
= priv
->host
->csr
.max_rec
;
1331 arp1394
->sspd
= priv
->host
->csr
.lnk_spd
;
1332 arp1394
->fifo_hi
= htons(priv
->local_fifo
>> 32);
1333 arp1394
->fifo_lo
= htonl(priv
->local_fifo
& ~0x0);
1336 /* We need to encapsulate the standard header with our own. We use the
1337 * ethernet header's proto for our own. */
1338 static unsigned int ether1394_encapsulate_prep(unsigned int max_payload
,
1340 union eth1394_hdr
*hdr
,
1341 u16 dg_size
, u16 dgl
)
1343 unsigned int adj_max_payload
=
1344 max_payload
- hdr_type_len
[ETH1394_HDR_LF_UF
];
1346 /* Does it all fit in one packet? */
1347 if (dg_size
<= adj_max_payload
) {
1348 hdr
->uf
.lf
= ETH1394_HDR_LF_UF
;
1349 hdr
->uf
.ether_type
= proto
;
1351 hdr
->ff
.lf
= ETH1394_HDR_LF_FF
;
1352 hdr
->ff
.ether_type
= proto
;
1353 hdr
->ff
.dg_size
= dg_size
- 1;
1355 adj_max_payload
= max_payload
- hdr_type_len
[ETH1394_HDR_LF_FF
];
1357 return (dg_size
+ adj_max_payload
- 1) / adj_max_payload
;
1360 static unsigned int ether1394_encapsulate(struct sk_buff
*skb
,
1361 unsigned int max_payload
,
1362 union eth1394_hdr
*hdr
)
1364 union eth1394_hdr
*bufhdr
;
1365 int ftype
= hdr
->common
.lf
;
1366 int hdrsz
= hdr_type_len
[ftype
];
1367 unsigned int adj_max_payload
= max_payload
- hdrsz
;
1370 case ETH1394_HDR_LF_UF
:
1371 bufhdr
= (union eth1394_hdr
*)skb_push(skb
, hdrsz
);
1372 bufhdr
->words
.word1
= htons(hdr
->words
.word1
);
1373 bufhdr
->words
.word2
= hdr
->words
.word2
;
1376 case ETH1394_HDR_LF_FF
:
1377 bufhdr
= (union eth1394_hdr
*)skb_push(skb
, hdrsz
);
1378 bufhdr
->words
.word1
= htons(hdr
->words
.word1
);
1379 bufhdr
->words
.word2
= hdr
->words
.word2
;
1380 bufhdr
->words
.word3
= htons(hdr
->words
.word3
);
1381 bufhdr
->words
.word4
= 0;
1383 /* Set frag type here for future interior fragments */
1384 hdr
->common
.lf
= ETH1394_HDR_LF_IF
;
1389 hdr
->sf
.fg_off
+= adj_max_payload
;
1390 bufhdr
= (union eth1394_hdr
*)skb_pull(skb
, adj_max_payload
);
1391 if (max_payload
>= skb
->len
)
1392 hdr
->common
.lf
= ETH1394_HDR_LF_LF
;
1393 bufhdr
->words
.word1
= htons(hdr
->words
.word1
);
1394 bufhdr
->words
.word2
= htons(hdr
->words
.word2
);
1395 bufhdr
->words
.word3
= htons(hdr
->words
.word3
);
1396 bufhdr
->words
.word4
= 0;
1398 return min(max_payload
, skb
->len
);
1401 static struct hpsb_packet
*ether1394_alloc_common_packet(struct hpsb_host
*host
)
1403 struct hpsb_packet
*p
;
1405 p
= hpsb_alloc_packet(0);
1408 p
->generation
= get_hpsb_generation(host
);
1409 p
->type
= hpsb_async
;
1414 static int ether1394_prep_write_packet(struct hpsb_packet
*p
,
1415 struct hpsb_host
*host
, nodeid_t node
,
1416 u64 addr
, void *data
, int tx_len
)
1421 p
->tcode
= TCODE_WRITEB
;
1422 p
->header
[1] = host
->node_id
<< 16 | addr
>> 32;
1423 p
->header
[2] = addr
& 0xffffffff;
1425 p
->header_size
= 16;
1426 p
->expect_response
= 1;
1428 if (hpsb_get_tlabel(p
)) {
1429 ETH1394_PRINT_G(KERN_ERR
, "No more tlabels left while sending "
1430 "to node " NODE_BUS_FMT
"\n", NODE_BUS_ARGS(host
, node
));
1434 p
->node_id
<< 16 | p
->tlabel
<< 10 | 1 << 8 | TCODE_WRITEB
<< 4;
1436 p
->header
[3] = tx_len
<< 16;
1437 p
->data_size
= (tx_len
+ 3) & ~3;
1443 static void ether1394_prep_gasp_packet(struct hpsb_packet
*p
,
1444 struct eth1394_priv
*priv
,
1445 struct sk_buff
*skb
, int length
)
1448 p
->tcode
= TCODE_STREAM_DATA
;
1450 p
->header
[0] = length
<< 16 | 3 << 14 | priv
->broadcast_channel
<< 8 |
1451 TCODE_STREAM_DATA
<< 4;
1452 p
->data_size
= length
;
1453 p
->data
= (quadlet_t
*)skb
->data
- 2;
1454 p
->data
[0] = cpu_to_be32(priv
->host
->node_id
<< 16 |
1455 ETHER1394_GASP_SPECIFIER_ID_HI
);
1456 p
->data
[1] = cpu_to_be32(ETHER1394_GASP_SPECIFIER_ID_LO
<< 24 |
1457 ETHER1394_GASP_VERSION
);
1459 /* Setting the node id to ALL_NODES (not LOCAL_BUS | ALL_NODES)
1460 * prevents hpsb_send_packet() from setting the speed to an arbitrary
1461 * value based on packet->node_id if packet->node_id is not set. */
1462 p
->node_id
= ALL_NODES
;
1463 p
->speed_code
= priv
->bc_sspd
;
1466 static void ether1394_free_packet(struct hpsb_packet
*packet
)
1468 if (packet
->tcode
!= TCODE_STREAM_DATA
)
1469 hpsb_free_tlabel(packet
);
1470 hpsb_free_packet(packet
);
1473 static void ether1394_complete_cb(void *__ptask
);
1475 static int ether1394_send_packet(struct packet_task
*ptask
, unsigned int tx_len
)
1477 struct eth1394_priv
*priv
= ptask
->priv
;
1478 struct hpsb_packet
*packet
= NULL
;
1480 packet
= ether1394_alloc_common_packet(priv
->host
);
1484 if (ptask
->tx_type
== ETH1394_GASP
) {
1485 int length
= tx_len
+ 2 * sizeof(quadlet_t
);
1487 ether1394_prep_gasp_packet(packet
, priv
, ptask
->skb
, length
);
1488 } else if (ether1394_prep_write_packet(packet
, priv
->host
,
1490 ptask
->addr
, ptask
->skb
->data
,
1492 hpsb_free_packet(packet
);
1496 ptask
->packet
= packet
;
1497 hpsb_set_packet_complete_task(ptask
->packet
, ether1394_complete_cb
,
1500 if (hpsb_send_packet(packet
) < 0) {
1501 ether1394_free_packet(packet
);
1508 /* Task function to be run when a datagram transmission is completed */
1509 static void ether1394_dg_complete(struct packet_task
*ptask
, int fail
)
1511 struct sk_buff
*skb
= ptask
->skb
;
1512 struct eth1394_priv
*priv
= netdev_priv(skb
->dev
);
1513 unsigned long flags
;
1516 spin_lock_irqsave(&priv
->lock
, flags
);
1518 priv
->stats
.tx_dropped
++;
1519 priv
->stats
.tx_errors
++;
1521 priv
->stats
.tx_bytes
+= skb
->len
;
1522 priv
->stats
.tx_packets
++;
1524 spin_unlock_irqrestore(&priv
->lock
, flags
);
1526 dev_kfree_skb_any(skb
);
1527 kmem_cache_free(packet_task_cache
, ptask
);
1530 /* Callback for when a packet has been sent and the status of that packet is
1532 static void ether1394_complete_cb(void *__ptask
)
1534 struct packet_task
*ptask
= (struct packet_task
*)__ptask
;
1535 struct hpsb_packet
*packet
= ptask
->packet
;
1538 if (packet
->tcode
!= TCODE_STREAM_DATA
)
1539 fail
= hpsb_packet_success(packet
);
1541 ether1394_free_packet(packet
);
1543 ptask
->outstanding_pkts
--;
1544 if (ptask
->outstanding_pkts
> 0 && !fail
) {
1547 /* Add the encapsulation header to the fragment */
1548 tx_len
= ether1394_encapsulate(ptask
->skb
, ptask
->max_payload
,
1550 if (ether1394_send_packet(ptask
, tx_len
))
1551 ether1394_dg_complete(ptask
, 1);
1553 ether1394_dg_complete(ptask
, fail
);
1557 /* Transmit a packet (called by kernel) */
1558 static int ether1394_tx(struct sk_buff
*skb
, struct net_device
*dev
)
1560 gfp_t kmflags
= in_interrupt() ? GFP_ATOMIC
: GFP_KERNEL
;
1561 struct eth1394hdr
*eth
;
1562 struct eth1394_priv
*priv
= netdev_priv(dev
);
1564 unsigned long flags
;
1566 eth1394_tx_type tx_type
;
1568 unsigned int tx_len
;
1569 unsigned int max_payload
;
1572 struct packet_task
*ptask
;
1573 struct eth1394_node_ref
*node
;
1574 struct eth1394_node_info
*node_info
= NULL
;
1576 ptask
= kmem_cache_alloc(packet_task_cache
, kmflags
);
1577 if (ptask
== NULL
) {
1582 /* XXX Ignore this for now. Noticed that when MacOSX is the IRM,
1583 * it does not set our validity bit. We need to compensate for
1584 * that somewhere else, but not in eth1394. */
1586 if ((priv
->host
->csr
.broadcast_channel
& 0xc0000000) != 0xc0000000) {
1592 skb
= skb_share_check(skb
, kmflags
);
1598 /* Get rid of the fake eth1394 header, but save a pointer */
1599 eth
= (struct eth1394hdr
*)skb
->data
;
1600 skb_pull(skb
, ETH1394_HLEN
);
1602 proto
= eth
->h_proto
;
1605 /* Set the transmission type for the packet. ARP packets and IP
1606 * broadcast packets are sent via GASP. */
1607 if (memcmp(eth
->h_dest
, dev
->broadcast
, ETH1394_ALEN
) == 0 ||
1608 proto
== htons(ETH_P_ARP
) ||
1609 (proto
== htons(ETH_P_IP
) &&
1610 IN_MULTICAST(ntohl(ip_hdr(skb
)->daddr
)))) {
1611 tx_type
= ETH1394_GASP
;
1612 dest_node
= LOCAL_BUS
| ALL_NODES
;
1613 max_payload
= priv
->bc_maxpayload
- ETHER1394_GASP_OVERHEAD
;
1614 BUG_ON(max_payload
< 512 - ETHER1394_GASP_OVERHEAD
);
1616 if (max_payload
< dg_size
+ hdr_type_len
[ETH1394_HDR_LF_UF
])
1619 __be64 guid
= get_unaligned((u64
*)eth
->h_dest
);
1621 node
= eth1394_find_node_guid(&priv
->ip_node_list
,
1628 (struct eth1394_node_info
*)node
->ud
->device
.driver_data
;
1629 if (node_info
->fifo
== CSR1212_INVALID_ADDR_SPACE
) {
1634 dest_node
= node
->ud
->ne
->nodeid
;
1635 max_payload
= node_info
->maxpayload
;
1636 BUG_ON(max_payload
< 512 - ETHER1394_GASP_OVERHEAD
);
1638 dgl
= node_info
->dgl
;
1639 if (max_payload
< dg_size
+ hdr_type_len
[ETH1394_HDR_LF_UF
])
1641 tx_type
= ETH1394_WRREQ
;
1644 /* If this is an ARP packet, convert it */
1645 if (proto
== htons(ETH_P_ARP
))
1646 ether1394_arp_to_1394arp(skb
, dev
);
1648 ptask
->hdr
.words
.word1
= 0;
1649 ptask
->hdr
.words
.word2
= 0;
1650 ptask
->hdr
.words
.word3
= 0;
1651 ptask
->hdr
.words
.word4
= 0;
1654 ptask
->tx_type
= tx_type
;
1656 if (tx_type
!= ETH1394_GASP
) {
1659 spin_lock_irqsave(&priv
->lock
, flags
);
1660 addr
= node_info
->fifo
;
1661 spin_unlock_irqrestore(&priv
->lock
, flags
);
1664 ptask
->dest_node
= dest_node
;
1667 ptask
->tx_type
= tx_type
;
1668 ptask
->max_payload
= max_payload
;
1669 ptask
->outstanding_pkts
= ether1394_encapsulate_prep(max_payload
,
1670 proto
, &ptask
->hdr
, dg_size
, dgl
);
1672 /* Add the encapsulation header to the fragment */
1673 tx_len
= ether1394_encapsulate(skb
, max_payload
, &ptask
->hdr
);
1674 dev
->trans_start
= jiffies
;
1675 if (ether1394_send_packet(ptask
, tx_len
))
1678 netif_wake_queue(dev
);
1682 kmem_cache_free(packet_task_cache
, ptask
);
1687 spin_lock_irqsave(&priv
->lock
, flags
);
1688 priv
->stats
.tx_dropped
++;
1689 priv
->stats
.tx_errors
++;
1690 spin_unlock_irqrestore(&priv
->lock
, flags
);
1692 if (netif_queue_stopped(dev
))
1693 netif_wake_queue(dev
);
1695 return 0; /* returning non-zero causes serious problems */
1698 static void ether1394_get_drvinfo(struct net_device
*dev
,
1699 struct ethtool_drvinfo
*info
)
1701 strcpy(info
->driver
, driver_name
);
1702 strcpy(info
->bus_info
, "ieee1394"); /* FIXME provide more detail? */
1705 static struct ethtool_ops ethtool_ops
= {
1706 .get_drvinfo
= ether1394_get_drvinfo
1709 static int __init
ether1394_init_module (void)
1711 packet_task_cache
= kmem_cache_create("packet_task",
1712 sizeof(struct packet_task
),
1715 hpsb_register_highlevel(ð1394_highlevel
);
1716 return hpsb_register_protocol(ð1394_proto_driver
);
1719 static void __exit
ether1394_exit_module (void)
1721 hpsb_unregister_protocol(ð1394_proto_driver
);
1722 hpsb_unregister_highlevel(ð1394_highlevel
);
1723 kmem_cache_destroy(packet_task_cache
);
1726 module_init(ether1394_init_module
);
1727 module_exit(ether1394_exit_module
);