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/if_arp.h>
54 #include <linux/if_ether.h>
57 #include <linux/tcp.h>
58 #include <linux/skbuff.h>
59 #include <linux/bitops.h>
60 #include <linux/ethtool.h>
61 #include <asm/uaccess.h>
62 #include <asm/delay.h>
63 #include <asm/unaligned.h>
66 #include "config_roms.h"
69 #include "highlevel.h"
71 #include "ieee1394_core.h"
72 #include "ieee1394_hotplug.h"
73 #include "ieee1394_transactions.h"
74 #include "ieee1394_types.h"
78 #define ETH1394_PRINT_G(level, fmt, args...) \
79 printk(level "%s: " fmt, driver_name, ## args)
81 #define ETH1394_PRINT(level, dev_name, fmt, args...) \
82 printk(level "%s: %s: " fmt, driver_name, dev_name, ## args)
84 struct fragment_info
{
85 struct list_head list
;
90 struct partial_datagram
{
91 struct list_head list
;
97 struct list_head frag_info
;
101 struct list_head list
; /* partial datagram list per node */
102 unsigned int sz
; /* partial datagram list size per node */
103 spinlock_t lock
; /* partial datagram lock */
106 struct eth1394_host_info
{
107 struct hpsb_host
*host
;
108 struct net_device
*dev
;
111 struct eth1394_node_ref
{
112 struct unit_directory
*ud
;
113 struct list_head list
;
116 struct eth1394_node_info
{
117 u16 maxpayload
; /* max payload */
118 u8 sspd
; /* max speed */
119 u64 fifo
; /* FIFO address */
120 struct pdg_list pdg
; /* partial RX datagram lists */
121 int dgl
; /* outgoing datagram label */
124 static const char driver_name
[] = "eth1394";
126 static struct kmem_cache
*packet_task_cache
;
128 static struct hpsb_highlevel eth1394_highlevel
;
130 /* Use common.lf to determine header len */
131 static const int hdr_type_len
[] = {
132 sizeof(struct eth1394_uf_hdr
),
133 sizeof(struct eth1394_ff_hdr
),
134 sizeof(struct eth1394_sf_hdr
),
135 sizeof(struct eth1394_sf_hdr
)
138 static const u16 eth1394_speedto_maxpayload
[] = {
139 /* S100, S200, S400, S800, S1600, S3200 */
140 512, 1024, 2048, 4096, 4096, 4096
143 MODULE_AUTHOR("Ben Collins (bcollins@debian.org)");
144 MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)");
145 MODULE_LICENSE("GPL");
148 * The max_partial_datagrams parameter is the maximum number of fragmented
149 * datagrams per node that eth1394 will keep in memory. Providing an upper
150 * bound allows us to limit the amount of memory that partial datagrams
151 * consume in the event that some partial datagrams are never completed.
153 static int max_partial_datagrams
= 25;
154 module_param(max_partial_datagrams
, int, S_IRUGO
| S_IWUSR
);
155 MODULE_PARM_DESC(max_partial_datagrams
,
156 "Maximum number of partially received fragmented datagrams "
160 static int ether1394_header(struct sk_buff
*skb
, struct net_device
*dev
,
161 unsigned short type
, void *daddr
, void *saddr
,
163 static int ether1394_rebuild_header(struct sk_buff
*skb
);
164 static int ether1394_header_parse(struct sk_buff
*skb
, unsigned char *haddr
);
165 static int ether1394_header_cache(struct neighbour
*neigh
, struct hh_cache
*hh
);
166 static void ether1394_header_cache_update(struct hh_cache
*hh
,
167 struct net_device
*dev
,
168 unsigned char *haddr
);
169 static int ether1394_tx(struct sk_buff
*skb
, struct net_device
*dev
);
170 static void ether1394_iso(struct hpsb_iso
*iso
);
172 static struct ethtool_ops ethtool_ops
;
174 static int ether1394_write(struct hpsb_host
*host
, int srcid
, int destid
,
175 quadlet_t
*data
, u64 addr
, size_t len
, u16 flags
);
176 static void ether1394_add_host(struct hpsb_host
*host
);
177 static void ether1394_remove_host(struct hpsb_host
*host
);
178 static void ether1394_host_reset(struct hpsb_host
*host
);
180 /* Function for incoming 1394 packets */
181 static struct hpsb_address_ops addr_ops
= {
182 .write
= ether1394_write
,
185 /* Ieee1394 highlevel driver functions */
186 static struct hpsb_highlevel eth1394_highlevel
= {
188 .add_host
= ether1394_add_host
,
189 .remove_host
= ether1394_remove_host
,
190 .host_reset
= ether1394_host_reset
,
193 static int ether1394_recv_init(struct eth1394_priv
*priv
)
195 unsigned int iso_buf_size
;
197 /* FIXME: rawiso limits us to PAGE_SIZE */
198 iso_buf_size
= min((unsigned int)PAGE_SIZE
,
199 2 * (1U << (priv
->host
->csr
.max_rec
+ 1)));
201 priv
->iso
= hpsb_iso_recv_init(priv
->host
,
202 ETHER1394_GASP_BUFFERS
* iso_buf_size
,
203 ETHER1394_GASP_BUFFERS
,
204 priv
->broadcast_channel
,
205 HPSB_ISO_DMA_PACKET_PER_BUFFER
,
207 if (priv
->iso
== NULL
) {
208 ETH1394_PRINT_G(KERN_ERR
, "Failed to allocate IR context\n");
209 priv
->bc_state
= ETHER1394_BC_ERROR
;
213 if (hpsb_iso_recv_start(priv
->iso
, -1, (1 << 3), -1) < 0)
214 priv
->bc_state
= ETHER1394_BC_STOPPED
;
216 priv
->bc_state
= ETHER1394_BC_RUNNING
;
220 /* This is called after an "ifup" */
221 static int ether1394_open(struct net_device
*dev
)
223 struct eth1394_priv
*priv
= netdev_priv(dev
);
226 if (priv
->bc_state
== ETHER1394_BC_ERROR
) {
227 ret
= ether1394_recv_init(priv
);
231 netif_start_queue(dev
);
235 /* This is called after an "ifdown" */
236 static int ether1394_stop(struct net_device
*dev
)
238 netif_stop_queue(dev
);
242 /* Return statistics to the caller */
243 static struct net_device_stats
*ether1394_stats(struct net_device
*dev
)
245 return &(((struct eth1394_priv
*)netdev_priv(dev
))->stats
);
248 /* FIXME: What to do if we timeout? I think a host reset is probably in order,
249 * so that's what we do. Should we increment the stat counters too? */
250 static void ether1394_tx_timeout(struct net_device
*dev
)
252 struct hpsb_host
*host
=
253 ((struct eth1394_priv
*)netdev_priv(dev
))->host
;
255 ETH1394_PRINT(KERN_ERR
, dev
->name
, "Timeout, resetting host\n");
256 ether1394_host_reset(host
);
259 static inline int ether1394_max_mtu(struct hpsb_host
* host
)
261 return (1 << (host
->csr
.max_rec
+ 1))
262 - sizeof(union eth1394_hdr
) - ETHER1394_GASP_OVERHEAD
;
265 static int ether1394_change_mtu(struct net_device
*dev
, int new_mtu
)
272 max_mtu
= ether1394_max_mtu(
273 ((struct eth1394_priv
*)netdev_priv(dev
))->host
);
274 if (new_mtu
> max_mtu
) {
275 ETH1394_PRINT(KERN_INFO
, dev
->name
,
276 "Local node constrains MTU to %d\n", max_mtu
);
284 static void purge_partial_datagram(struct list_head
*old
)
286 struct partial_datagram
*pd
;
287 struct list_head
*lh
, *n
;
288 struct fragment_info
*fi
;
290 pd
= list_entry(old
, struct partial_datagram
, list
);
292 list_for_each_safe(lh
, n
, &pd
->frag_info
) {
293 fi
= list_entry(lh
, struct fragment_info
, list
);
302 /******************************************
303 * 1394 bus activity functions
304 ******************************************/
306 static struct eth1394_node_ref
*eth1394_find_node(struct list_head
*inl
,
307 struct unit_directory
*ud
)
309 struct eth1394_node_ref
*node
;
311 list_for_each_entry(node
, inl
, list
)
318 static struct eth1394_node_ref
*eth1394_find_node_guid(struct list_head
*inl
,
321 struct eth1394_node_ref
*node
;
323 list_for_each_entry(node
, inl
, list
)
324 if (node
->ud
->ne
->guid
== guid
)
330 static struct eth1394_node_ref
*eth1394_find_node_nodeid(struct list_head
*inl
,
333 struct eth1394_node_ref
*node
;
335 list_for_each_entry(node
, inl
, list
)
336 if (node
->ud
->ne
->nodeid
== nodeid
)
342 static int eth1394_new_node(struct eth1394_host_info
*hi
,
343 struct unit_directory
*ud
)
345 struct eth1394_priv
*priv
;
346 struct eth1394_node_ref
*new_node
;
347 struct eth1394_node_info
*node_info
;
349 new_node
= kmalloc(sizeof(*new_node
), GFP_KERNEL
);
353 node_info
= kmalloc(sizeof(*node_info
), GFP_KERNEL
);
359 spin_lock_init(&node_info
->pdg
.lock
);
360 INIT_LIST_HEAD(&node_info
->pdg
.list
);
361 node_info
->pdg
.sz
= 0;
362 node_info
->fifo
= CSR1212_INVALID_ADDR_SPACE
;
364 ud
->device
.driver_data
= node_info
;
367 priv
= netdev_priv(hi
->dev
);
368 list_add_tail(&new_node
->list
, &priv
->ip_node_list
);
372 static int eth1394_probe(struct device
*dev
)
374 struct unit_directory
*ud
;
375 struct eth1394_host_info
*hi
;
377 ud
= container_of(dev
, struct unit_directory
, device
);
378 hi
= hpsb_get_hostinfo(ð1394_highlevel
, ud
->ne
->host
);
382 return eth1394_new_node(hi
, ud
);
385 static int eth1394_remove(struct device
*dev
)
387 struct unit_directory
*ud
;
388 struct eth1394_host_info
*hi
;
389 struct eth1394_priv
*priv
;
390 struct eth1394_node_ref
*old_node
;
391 struct eth1394_node_info
*node_info
;
392 struct list_head
*lh
, *n
;
395 ud
= container_of(dev
, struct unit_directory
, device
);
396 hi
= hpsb_get_hostinfo(ð1394_highlevel
, ud
->ne
->host
);
400 priv
= netdev_priv(hi
->dev
);
402 old_node
= eth1394_find_node(&priv
->ip_node_list
, ud
);
406 list_del(&old_node
->list
);
409 node_info
= (struct eth1394_node_info
*)ud
->device
.driver_data
;
411 spin_lock_irqsave(&node_info
->pdg
.lock
, flags
);
412 /* The partial datagram list should be empty, but we'll just
413 * make sure anyway... */
414 list_for_each_safe(lh
, n
, &node_info
->pdg
.list
)
415 purge_partial_datagram(lh
);
416 spin_unlock_irqrestore(&node_info
->pdg
.lock
, flags
);
419 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
;
429 hi
= hpsb_get_hostinfo(ð1394_highlevel
, ud
->ne
->host
);
433 priv
= netdev_priv(hi
->dev
);
434 node
= eth1394_find_node(&priv
->ip_node_list
, ud
);
438 return eth1394_new_node(hi
, ud
);
441 static struct ieee1394_device_id eth1394_id_table
[] = {
443 .match_flags
= (IEEE1394_MATCH_SPECIFIER_ID
|
444 IEEE1394_MATCH_VERSION
),
445 .specifier_id
= ETHER1394_GASP_SPECIFIER_ID
,
446 .version
= ETHER1394_GASP_VERSION
,
451 MODULE_DEVICE_TABLE(ieee1394
, eth1394_id_table
);
453 static struct hpsb_protocol_driver eth1394_proto_driver
= {
455 .id_table
= eth1394_id_table
,
456 .update
= eth1394_update
,
458 .probe
= eth1394_probe
,
459 .remove
= eth1394_remove
,
463 static void ether1394_reset_priv(struct net_device
*dev
, int set_mtu
)
467 struct eth1394_priv
*priv
= netdev_priv(dev
);
468 struct hpsb_host
*host
= priv
->host
;
469 u64 guid
= get_unaligned((u64
*)&(host
->csr
.rom
->bus_info_data
[3]));
470 int max_speed
= IEEE1394_SPEED_MAX
;
472 spin_lock_irqsave(&priv
->lock
, flags
);
474 memset(priv
->ud_list
, 0, sizeof(priv
->ud_list
));
475 priv
->bc_maxpayload
= 512;
477 /* Determine speed limit */
478 /* FIXME: This is broken for nodes with link speed < PHY speed,
479 * and it is suboptimal for S200B...S800B hardware.
480 * The result of nodemgr's speed probe should be used somehow. */
481 for (i
= 0; i
< host
->node_count
; i
++) {
482 /* take care of S100B...S400B PHY ports */
483 if (host
->speed
[i
] == SELFID_SPEED_UNKNOWN
) {
484 max_speed
= IEEE1394_SPEED_100
;
487 if (max_speed
> host
->speed
[i
])
488 max_speed
= host
->speed
[i
];
490 priv
->bc_sspd
= max_speed
;
493 /* Use the RFC 2734 default 1500 octets or the maximum payload
495 dev
->mtu
= min(1500, ether1394_max_mtu(host
));
497 /* Set our hardware address while we're at it */
498 memcpy(dev
->dev_addr
, &guid
, sizeof(u64
));
499 memset(dev
->broadcast
, 0xff, sizeof(u64
));
502 spin_unlock_irqrestore(&priv
->lock
, flags
);
505 static void ether1394_init_dev(struct net_device
*dev
)
507 dev
->open
= ether1394_open
;
508 dev
->stop
= ether1394_stop
;
509 dev
->hard_start_xmit
= ether1394_tx
;
510 dev
->get_stats
= ether1394_stats
;
511 dev
->tx_timeout
= ether1394_tx_timeout
;
512 dev
->change_mtu
= ether1394_change_mtu
;
514 dev
->hard_header
= ether1394_header
;
515 dev
->rebuild_header
= ether1394_rebuild_header
;
516 dev
->hard_header_cache
= ether1394_header_cache
;
517 dev
->header_cache_update
= ether1394_header_cache_update
;
518 dev
->hard_header_parse
= ether1394_header_parse
;
520 SET_ETHTOOL_OPS(dev
, ðtool_ops
);
522 dev
->watchdog_timeo
= ETHER1394_TIMEOUT
;
523 dev
->flags
= IFF_BROADCAST
| IFF_MULTICAST
;
524 dev
->features
= NETIF_F_HIGHDMA
;
525 dev
->addr_len
= ETH1394_ALEN
;
526 dev
->hard_header_len
= ETH1394_HLEN
;
527 dev
->type
= ARPHRD_IEEE1394
;
529 /* FIXME: This value was copied from ether_setup(). Is it too much? */
530 dev
->tx_queue_len
= 1000;
534 * This function is called every time a card is found. It is generally called
535 * when the module is installed. This is where we add all of our ethernet
536 * devices. One for each host.
538 static void ether1394_add_host(struct hpsb_host
*host
)
540 struct eth1394_host_info
*hi
= NULL
;
541 struct net_device
*dev
= NULL
;
542 struct eth1394_priv
*priv
;
545 if (hpsb_config_rom_ip1394_add(host
) != 0) {
546 ETH1394_PRINT_G(KERN_ERR
, "Can't add IP-over-1394 ROM entry\n");
550 fifo_addr
= hpsb_allocate_and_register_addrspace(
551 ð1394_highlevel
, host
, &addr_ops
,
552 ETHER1394_REGION_ADDR_LEN
, ETHER1394_REGION_ADDR_LEN
,
553 CSR1212_INVALID_ADDR_SPACE
, CSR1212_INVALID_ADDR_SPACE
);
554 if (fifo_addr
== CSR1212_INVALID_ADDR_SPACE
) {
555 ETH1394_PRINT_G(KERN_ERR
, "Cannot register CSR space\n");
556 hpsb_config_rom_ip1394_remove(host
);
560 dev
= alloc_netdev(sizeof(*priv
), "eth%d", ether1394_init_dev
);
562 ETH1394_PRINT_G(KERN_ERR
, "Out of memory\n");
566 SET_MODULE_OWNER(dev
);
568 /* FIXME - Is this the correct parent device anyway? */
569 SET_NETDEV_DEV(dev
, &host
->device
);
572 priv
= netdev_priv(dev
);
573 INIT_LIST_HEAD(&priv
->ip_node_list
);
574 spin_lock_init(&priv
->lock
);
576 priv
->local_fifo
= fifo_addr
;
578 hi
= hpsb_create_hostinfo(ð1394_highlevel
, host
, sizeof(*hi
));
580 ETH1394_PRINT_G(KERN_ERR
, "Out of memory\n");
584 ether1394_reset_priv(dev
, 1);
586 if (register_netdev(dev
)) {
587 ETH1394_PRINT_G(KERN_ERR
, "Cannot register the driver\n");
591 ETH1394_PRINT(KERN_INFO
, dev
->name
, "IPv4 over IEEE 1394 (fw-host%d)\n",
597 /* Ignore validity in hopes that it will be set in the future. It'll
598 * be checked when the eth device is opened. */
599 priv
->broadcast_channel
= host
->csr
.broadcast_channel
& 0x3f;
601 ether1394_recv_init(priv
);
607 hpsb_destroy_hostinfo(ð1394_highlevel
, host
);
608 hpsb_unregister_addrspace(ð1394_highlevel
, host
, fifo_addr
);
609 hpsb_config_rom_ip1394_remove(host
);
612 /* Remove a card from our list */
613 static void ether1394_remove_host(struct hpsb_host
*host
)
615 struct eth1394_host_info
*hi
;
616 struct eth1394_priv
*priv
;
618 hi
= hpsb_get_hostinfo(ð1394_highlevel
, host
);
621 priv
= netdev_priv(hi
->dev
);
622 hpsb_unregister_addrspace(ð1394_highlevel
, host
, priv
->local_fifo
);
623 hpsb_config_rom_ip1394_remove(host
);
625 hpsb_iso_shutdown(priv
->iso
);
626 unregister_netdev(hi
->dev
);
627 free_netdev(hi
->dev
);
630 /* A bus reset happened */
631 static void ether1394_host_reset(struct hpsb_host
*host
)
633 struct eth1394_host_info
*hi
;
634 struct eth1394_priv
*priv
;
635 struct net_device
*dev
;
636 struct list_head
*lh
, *n
;
637 struct eth1394_node_ref
*node
;
638 struct eth1394_node_info
*node_info
;
641 hi
= hpsb_get_hostinfo(ð1394_highlevel
, host
);
643 /* This can happen for hosts that we don't use */
648 priv
= netdev_priv(dev
);
650 /* Reset our private host data, but not our MTU */
651 netif_stop_queue(dev
);
652 ether1394_reset_priv(dev
, 0);
654 list_for_each_entry(node
, &priv
->ip_node_list
, list
) {
655 node_info
= node
->ud
->device
.driver_data
;
657 spin_lock_irqsave(&node_info
->pdg
.lock
, flags
);
659 list_for_each_safe(lh
, n
, &node_info
->pdg
.list
)
660 purge_partial_datagram(lh
);
662 INIT_LIST_HEAD(&(node_info
->pdg
.list
));
663 node_info
->pdg
.sz
= 0;
665 spin_unlock_irqrestore(&node_info
->pdg
.lock
, flags
);
668 netif_wake_queue(dev
);
671 /******************************************
672 * HW Header net device functions
673 ******************************************/
674 /* These functions have been adapted from net/ethernet/eth.c */
676 /* Create a fake MAC header for an arbitrary protocol layer.
677 * saddr=NULL means use device source address
678 * daddr=NULL means leave destination address (eg unresolved arp). */
679 static int ether1394_header(struct sk_buff
*skb
, struct net_device
*dev
,
680 unsigned short type
, void *daddr
, void *saddr
,
683 struct eth1394hdr
*eth
=
684 (struct eth1394hdr
*)skb_push(skb
, ETH1394_HLEN
);
686 eth
->h_proto
= htons(type
);
688 if (dev
->flags
& (IFF_LOOPBACK
| IFF_NOARP
)) {
689 memset(eth
->h_dest
, 0, dev
->addr_len
);
690 return dev
->hard_header_len
;
694 memcpy(eth
->h_dest
, daddr
, dev
->addr_len
);
695 return dev
->hard_header_len
;
698 return -dev
->hard_header_len
;
701 /* Rebuild the faked MAC header. This is called after an ARP
702 * (or in future other address resolution) has completed on this
703 * sk_buff. We now let ARP fill in the other fields.
705 * This routine CANNOT use cached dst->neigh!
706 * Really, it is used only when dst->neigh is wrong.
708 static int ether1394_rebuild_header(struct sk_buff
*skb
)
710 struct eth1394hdr
*eth
= (struct eth1394hdr
*)skb
->data
;
712 if (eth
->h_proto
== htons(ETH_P_IP
))
713 return arp_find((unsigned char *)ð
->h_dest
, skb
);
715 ETH1394_PRINT(KERN_DEBUG
, skb
->dev
->name
,
716 "unable to resolve type %04x addresses\n",
717 ntohs(eth
->h_proto
));
721 static int ether1394_header_parse(struct sk_buff
*skb
, unsigned char *haddr
)
723 struct net_device
*dev
= skb
->dev
;
725 memcpy(haddr
, dev
->dev_addr
, ETH1394_ALEN
);
729 static int ether1394_header_cache(struct neighbour
*neigh
, struct hh_cache
*hh
)
731 unsigned short type
= hh
->hh_type
;
732 struct net_device
*dev
= neigh
->dev
;
733 struct eth1394hdr
*eth
=
734 (struct eth1394hdr
*)((u8
*)hh
->hh_data
+ 16 - ETH1394_HLEN
);
736 if (type
== htons(ETH_P_802_3
))
740 memcpy(eth
->h_dest
, neigh
->ha
, dev
->addr_len
);
742 hh
->hh_len
= ETH1394_HLEN
;
746 /* Called by Address Resolution module to notify changes in address. */
747 static void ether1394_header_cache_update(struct hh_cache
*hh
,
748 struct net_device
*dev
,
749 unsigned char * haddr
)
751 memcpy((u8
*)hh
->hh_data
+ 16 - ETH1394_HLEN
, haddr
, dev
->addr_len
);
754 /******************************************
755 * Datagram reception code
756 ******************************************/
758 /* Copied from net/ethernet/eth.c */
759 static u16
ether1394_type_trans(struct sk_buff
*skb
, struct net_device
*dev
)
761 struct eth1394hdr
*eth
;
764 skb_reset_mac_header(skb
);
765 skb_pull(skb
, ETH1394_HLEN
);
766 eth
= eth1394_hdr(skb
);
768 if (*eth
->h_dest
& 1) {
769 if (memcmp(eth
->h_dest
, dev
->broadcast
, dev
->addr_len
) == 0)
770 skb
->pkt_type
= PACKET_BROADCAST
;
773 skb
->pkt_type
= PACKET_MULTICAST
;
776 if (memcmp(eth
->h_dest
, dev
->dev_addr
, dev
->addr_len
))
777 skb
->pkt_type
= PACKET_OTHERHOST
;
780 if (ntohs(eth
->h_proto
) >= 1536)
785 if (*(unsigned short *)rawp
== 0xFFFF)
786 return htons(ETH_P_802_3
);
788 return htons(ETH_P_802_2
);
791 /* Parse an encapsulated IP1394 header into an ethernet frame packet.
792 * We also perform ARP translation here, if need be. */
793 static u16
ether1394_parse_encap(struct sk_buff
*skb
, struct net_device
*dev
,
794 nodeid_t srcid
, nodeid_t destid
,
797 struct eth1394_priv
*priv
= netdev_priv(dev
);
799 unsigned short ret
= 0;
801 /* Setup our hw addresses. We use these to build the ethernet header. */
802 if (destid
== (LOCAL_BUS
| ALL_NODES
))
803 dest_hw
= ~0ULL; /* broadcast */
805 dest_hw
= cpu_to_be64((u64
)priv
->host
->csr
.guid_hi
<< 32 |
806 priv
->host
->csr
.guid_lo
);
808 /* If this is an ARP packet, convert it. First, we want to make
809 * use of some of the fields, since they tell us a little bit
810 * about the sending machine. */
811 if (ether_type
== htons(ETH_P_ARP
)) {
812 struct eth1394_arp
*arp1394
= (struct eth1394_arp
*)skb
->data
;
813 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
814 unsigned char *arp_ptr
= (unsigned char *)(arp
+ 1);
815 u64 fifo_addr
= (u64
)ntohs(arp1394
->fifo_hi
) << 32 |
816 ntohl(arp1394
->fifo_lo
);
817 u8 max_rec
= min(priv
->host
->csr
.max_rec
,
818 (u8
)(arp1394
->max_rec
));
819 int sspd
= arp1394
->sspd
;
821 struct eth1394_node_ref
*node
;
822 struct eth1394_node_info
*node_info
;
825 /* Sanity check. MacOSX seems to be sending us 131 in this
826 * field (atleast on my Panther G5). Not sure why. */
827 if (sspd
> 5 || sspd
< 0)
830 maxpayload
= min(eth1394_speedto_maxpayload
[sspd
],
831 (u16
)(1 << (max_rec
+ 1)));
833 guid
= get_unaligned(&arp1394
->s_uniq_id
);
834 node
= eth1394_find_node_guid(&priv
->ip_node_list
,
840 (struct eth1394_node_info
*)node
->ud
->device
.driver_data
;
842 /* Update our speed/payload/fifo_offset table */
843 node_info
->maxpayload
= maxpayload
;
844 node_info
->sspd
= sspd
;
845 node_info
->fifo
= fifo_addr
;
847 /* Now that we're done with the 1394 specific stuff, we'll
848 * need to alter some of the data. Believe it or not, all
849 * that needs to be done is sender_IP_address needs to be
850 * moved, the destination hardware address get stuffed
851 * in and the hardware address length set to 8.
853 * IMPORTANT: The code below overwrites 1394 specific data
854 * needed above so keep the munging of the data for the
855 * higher level IP stack last. */
858 arp_ptr
+= arp
->ar_hln
; /* skip over sender unique id */
859 *(u32
*)arp_ptr
= arp1394
->sip
; /* move sender IP addr */
860 arp_ptr
+= arp
->ar_pln
; /* skip over sender IP addr */
862 if (arp
->ar_op
== htons(ARPOP_REQUEST
))
863 memset(arp_ptr
, 0, sizeof(u64
));
865 memcpy(arp_ptr
, dev
->dev_addr
, sizeof(u64
));
868 /* Now add the ethernet header. */
869 if (dev
->hard_header(skb
, dev
, ntohs(ether_type
), &dest_hw
, NULL
,
871 ret
= ether1394_type_trans(skb
, dev
);
876 static int fragment_overlap(struct list_head
*frag_list
, int offset
, int len
)
878 struct fragment_info
*fi
;
879 int end
= offset
+ len
;
881 list_for_each_entry(fi
, frag_list
, list
)
882 if (offset
< fi
->offset
+ fi
->len
&& end
> fi
->offset
)
888 static struct list_head
*find_partial_datagram(struct list_head
*pdgl
, int dgl
)
890 struct partial_datagram
*pd
;
892 list_for_each_entry(pd
, pdgl
, list
)
899 /* Assumes that new fragment does not overlap any existing fragments */
900 static int new_fragment(struct list_head
*frag_info
, int offset
, int len
)
902 struct list_head
*lh
;
903 struct fragment_info
*fi
, *fi2
, *new;
905 list_for_each(lh
, frag_info
) {
906 fi
= list_entry(lh
, struct fragment_info
, list
);
907 if (fi
->offset
+ fi
->len
== offset
) {
908 /* The new fragment can be tacked on to the end */
910 /* Did the new fragment plug a hole? */
911 fi2
= list_entry(lh
->next
, struct fragment_info
, list
);
912 if (fi
->offset
+ fi
->len
== fi2
->offset
) {
913 /* glue fragments together */
919 } else if (offset
+ len
== fi
->offset
) {
920 /* The new fragment can be tacked on to the beginning */
923 /* Did the new fragment plug a hole? */
924 fi2
= list_entry(lh
->prev
, struct fragment_info
, list
);
925 if (fi2
->offset
+ fi2
->len
== fi
->offset
) {
926 /* glue fragments together */
932 } else if (offset
> fi
->offset
+ fi
->len
) {
934 } else if (offset
+ len
< fi
->offset
) {
940 new = kmalloc(sizeof(*new), GFP_ATOMIC
);
944 new->offset
= offset
;
947 list_add(&new->list
, lh
);
951 static int new_partial_datagram(struct net_device
*dev
, struct list_head
*pdgl
,
952 int dgl
, int dg_size
, char *frag_buf
,
953 int frag_off
, int frag_len
)
955 struct partial_datagram
*new;
957 new = kmalloc(sizeof(*new), GFP_ATOMIC
);
961 INIT_LIST_HEAD(&new->frag_info
);
963 if (new_fragment(&new->frag_info
, frag_off
, frag_len
) < 0) {
969 new->dg_size
= dg_size
;
971 new->skb
= dev_alloc_skb(dg_size
+ dev
->hard_header_len
+ 15);
973 struct fragment_info
*fi
= list_entry(new->frag_info
.next
,
974 struct fragment_info
,
981 skb_reserve(new->skb
, (dev
->hard_header_len
+ 15) & ~15);
982 new->pbuf
= skb_put(new->skb
, dg_size
);
983 memcpy(new->pbuf
+ frag_off
, frag_buf
, frag_len
);
985 list_add(&new->list
, pdgl
);
989 static int update_partial_datagram(struct list_head
*pdgl
, struct list_head
*lh
,
990 char *frag_buf
, int frag_off
, int frag_len
)
992 struct partial_datagram
*pd
=
993 list_entry(lh
, struct partial_datagram
, list
);
995 if (new_fragment(&pd
->frag_info
, frag_off
, frag_len
) < 0)
998 memcpy(pd
->pbuf
+ frag_off
, frag_buf
, frag_len
);
1000 /* Move list entry to beginnig of list so that oldest partial
1001 * datagrams percolate to the end of the list */
1002 list_move(lh
, pdgl
);
1006 static int is_datagram_complete(struct list_head
*lh
, int dg_size
)
1008 struct partial_datagram
*pd
;
1009 struct fragment_info
*fi
;
1011 pd
= list_entry(lh
, struct partial_datagram
, list
);
1012 fi
= list_entry(pd
->frag_info
.next
, struct fragment_info
, list
);
1014 return (fi
->len
== dg_size
);
1017 /* Packet reception. We convert the IP1394 encapsulation header to an
1018 * ethernet header, and fill it with some of our other fields. This is
1019 * an incoming packet from the 1394 bus. */
1020 static int ether1394_data_handler(struct net_device
*dev
, int srcid
, int destid
,
1023 struct sk_buff
*skb
;
1024 unsigned long flags
;
1025 struct eth1394_priv
*priv
= netdev_priv(dev
);
1026 union eth1394_hdr
*hdr
= (union eth1394_hdr
*)buf
;
1027 u16 ether_type
= 0; /* initialized to clear warning */
1029 struct unit_directory
*ud
= priv
->ud_list
[NODEID_TO_NODE(srcid
)];
1030 struct eth1394_node_info
*node_info
;
1033 struct eth1394_node_ref
*node
;
1034 node
= eth1394_find_node_nodeid(&priv
->ip_node_list
, srcid
);
1035 if (unlikely(!node
)) {
1036 HPSB_PRINT(KERN_ERR
, "ether1394 rx: sender nodeid "
1037 "lookup failure: " NODE_BUS_FMT
,
1038 NODE_BUS_ARGS(priv
->host
, srcid
));
1039 priv
->stats
.rx_dropped
++;
1044 priv
->ud_list
[NODEID_TO_NODE(srcid
)] = ud
;
1047 node_info
= (struct eth1394_node_info
*)ud
->device
.driver_data
;
1049 /* First, did we receive a fragmented or unfragmented datagram? */
1050 hdr
->words
.word1
= ntohs(hdr
->words
.word1
);
1052 hdr_len
= hdr_type_len
[hdr
->common
.lf
];
1054 if (hdr
->common
.lf
== ETH1394_HDR_LF_UF
) {
1055 /* An unfragmented datagram has been received by the ieee1394
1056 * bus. Build an skbuff around it so we can pass it to the
1057 * high level network layer. */
1059 skb
= dev_alloc_skb(len
+ dev
->hard_header_len
+ 15);
1060 if (unlikely(!skb
)) {
1061 ETH1394_PRINT_G(KERN_ERR
, "Out of memory\n");
1062 priv
->stats
.rx_dropped
++;
1065 skb_reserve(skb
, (dev
->hard_header_len
+ 15) & ~15);
1066 memcpy(skb_put(skb
, len
- hdr_len
), buf
+ hdr_len
,
1068 ether_type
= hdr
->uf
.ether_type
;
1070 /* A datagram fragment has been received, now the fun begins. */
1072 struct list_head
*pdgl
, *lh
;
1073 struct partial_datagram
*pd
;
1075 int fg_len
= len
- hdr_len
;
1079 struct pdg_list
*pdg
= &(node_info
->pdg
);
1081 hdr
->words
.word3
= ntohs(hdr
->words
.word3
);
1082 /* The 4th header word is reserved so no need to do ntohs() */
1084 if (hdr
->common
.lf
== ETH1394_HDR_LF_FF
) {
1085 ether_type
= hdr
->ff
.ether_type
;
1087 dg_size
= hdr
->ff
.dg_size
+ 1;
1090 hdr
->words
.word2
= ntohs(hdr
->words
.word2
);
1092 dg_size
= hdr
->sf
.dg_size
+ 1;
1093 fg_off
= hdr
->sf
.fg_off
;
1095 spin_lock_irqsave(&pdg
->lock
, flags
);
1097 pdgl
= &(pdg
->list
);
1098 lh
= find_partial_datagram(pdgl
, dgl
);
1101 while (pdg
->sz
>= max_partial_datagrams
) {
1102 /* remove the oldest */
1103 purge_partial_datagram(pdgl
->prev
);
1107 retval
= new_partial_datagram(dev
, pdgl
, dgl
, dg_size
,
1108 buf
+ hdr_len
, fg_off
,
1111 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1115 lh
= find_partial_datagram(pdgl
, dgl
);
1117 struct partial_datagram
*pd
;
1119 pd
= list_entry(lh
, struct partial_datagram
, list
);
1121 if (fragment_overlap(&pd
->frag_info
, fg_off
, fg_len
)) {
1122 /* Overlapping fragments, obliterate old
1123 * datagram and start new one. */
1124 purge_partial_datagram(lh
);
1125 retval
= new_partial_datagram(dev
, pdgl
, dgl
,
1131 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1135 retval
= update_partial_datagram(pdgl
, lh
,
1139 /* Couldn't save off fragment anyway
1140 * so might as well obliterate the
1142 purge_partial_datagram(lh
);
1144 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1147 } /* fragment overlap */
1148 } /* new datagram or add to existing one */
1150 pd
= list_entry(lh
, struct partial_datagram
, list
);
1152 if (hdr
->common
.lf
== ETH1394_HDR_LF_FF
)
1153 pd
->ether_type
= ether_type
;
1155 if (is_datagram_complete(lh
, dg_size
)) {
1156 ether_type
= pd
->ether_type
;
1158 skb
= skb_get(pd
->skb
);
1159 purge_partial_datagram(lh
);
1160 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1162 /* Datagram is not complete, we're done for the
1164 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1167 } /* unframgented datagram or fragmented one */
1169 /* Write metadata, and then pass to the receive level */
1171 skb
->ip_summed
= CHECKSUM_UNNECESSARY
; /* don't check it */
1173 /* Parse the encapsulation header. This actually does the job of
1174 * converting to an ethernet frame header, aswell as arp
1175 * conversion if needed. ARP conversion is easier in this
1176 * direction, since we are using ethernet as our backend. */
1177 skb
->protocol
= ether1394_parse_encap(skb
, dev
, srcid
, destid
,
1180 spin_lock_irqsave(&priv
->lock
, flags
);
1182 if (!skb
->protocol
) {
1183 priv
->stats
.rx_errors
++;
1184 priv
->stats
.rx_dropped
++;
1185 dev_kfree_skb_any(skb
);
1189 if (netif_rx(skb
) == NET_RX_DROP
) {
1190 priv
->stats
.rx_errors
++;
1191 priv
->stats
.rx_dropped
++;
1196 priv
->stats
.rx_packets
++;
1197 priv
->stats
.rx_bytes
+= skb
->len
;
1200 if (netif_queue_stopped(dev
))
1201 netif_wake_queue(dev
);
1202 spin_unlock_irqrestore(&priv
->lock
, flags
);
1204 dev
->last_rx
= jiffies
;
1209 static int ether1394_write(struct hpsb_host
*host
, int srcid
, int destid
,
1210 quadlet_t
*data
, u64 addr
, size_t len
, u16 flags
)
1212 struct eth1394_host_info
*hi
;
1214 hi
= hpsb_get_hostinfo(ð1394_highlevel
, host
);
1215 if (unlikely(!hi
)) {
1216 ETH1394_PRINT_G(KERN_ERR
, "No net device at fw-host%d\n",
1218 return RCODE_ADDRESS_ERROR
;
1221 if (ether1394_data_handler(hi
->dev
, srcid
, destid
, (char*)data
, len
))
1222 return RCODE_ADDRESS_ERROR
;
1224 return RCODE_COMPLETE
;
1227 static void ether1394_iso(struct hpsb_iso
*iso
)
1231 struct eth1394_host_info
*hi
;
1232 struct net_device
*dev
;
1233 struct eth1394_priv
*priv
;
1240 hi
= hpsb_get_hostinfo(ð1394_highlevel
, iso
->host
);
1241 if (unlikely(!hi
)) {
1242 ETH1394_PRINT_G(KERN_ERR
, "No net device at fw-host%d\n",
1249 nready
= hpsb_iso_n_ready(iso
);
1250 for (i
= 0; i
< nready
; i
++) {
1251 struct hpsb_iso_packet_info
*info
=
1252 &iso
->infos
[(iso
->first_packet
+ i
) % iso
->buf_packets
];
1253 data
= (quadlet_t
*)(iso
->data_buf
.kvirt
+ info
->offset
);
1255 /* skip over GASP header */
1256 buf
= (char *)data
+ 8;
1257 len
= info
->len
- 8;
1259 specifier_id
= (be32_to_cpu(data
[0]) & 0xffff) << 8 |
1260 (be32_to_cpu(data
[1]) & 0xff000000) >> 24;
1261 source_id
= be32_to_cpu(data
[0]) >> 16;
1263 priv
= netdev_priv(dev
);
1265 if (info
->channel
!= (iso
->host
->csr
.broadcast_channel
& 0x3f)
1266 || specifier_id
!= ETHER1394_GASP_SPECIFIER_ID
) {
1267 /* This packet is not for us */
1270 ether1394_data_handler(dev
, source_id
, LOCAL_BUS
| ALL_NODES
,
1274 hpsb_iso_recv_release_packets(iso
, i
);
1276 dev
->last_rx
= jiffies
;
1279 /******************************************
1280 * Datagram transmission code
1281 ******************************************/
1283 /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire
1284 * arphdr) is the same format as the ip1394 header, so they overlap. The rest
1285 * needs to be munged a bit. The remainder of the arphdr is formatted based
1286 * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to
1289 * Now that the EUI is used for the hardware address all we need to do to make
1290 * this work for 1394 is to insert 2 quadlets that contain max_rec size,
1291 * speed, and unicast FIFO address information between the sender_unique_id
1292 * and the IP addresses.
1294 static void ether1394_arp_to_1394arp(struct sk_buff
*skb
,
1295 struct net_device
*dev
)
1297 struct eth1394_priv
*priv
= netdev_priv(dev
);
1298 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
1299 unsigned char *arp_ptr
= (unsigned char *)(arp
+ 1);
1300 struct eth1394_arp
*arp1394
= (struct eth1394_arp
*)skb
->data
;
1302 arp1394
->hw_addr_len
= 16;
1303 arp1394
->sip
= *(u32
*)(arp_ptr
+ ETH1394_ALEN
);
1304 arp1394
->max_rec
= priv
->host
->csr
.max_rec
;
1305 arp1394
->sspd
= priv
->host
->csr
.lnk_spd
;
1306 arp1394
->fifo_hi
= htons(priv
->local_fifo
>> 32);
1307 arp1394
->fifo_lo
= htonl(priv
->local_fifo
& ~0x0);
1310 /* We need to encapsulate the standard header with our own. We use the
1311 * ethernet header's proto for our own. */
1312 static unsigned int ether1394_encapsulate_prep(unsigned int max_payload
,
1314 union eth1394_hdr
*hdr
,
1315 u16 dg_size
, u16 dgl
)
1317 unsigned int adj_max_payload
=
1318 max_payload
- hdr_type_len
[ETH1394_HDR_LF_UF
];
1320 /* Does it all fit in one packet? */
1321 if (dg_size
<= adj_max_payload
) {
1322 hdr
->uf
.lf
= ETH1394_HDR_LF_UF
;
1323 hdr
->uf
.ether_type
= proto
;
1325 hdr
->ff
.lf
= ETH1394_HDR_LF_FF
;
1326 hdr
->ff
.ether_type
= proto
;
1327 hdr
->ff
.dg_size
= dg_size
- 1;
1329 adj_max_payload
= max_payload
- hdr_type_len
[ETH1394_HDR_LF_FF
];
1331 return (dg_size
+ adj_max_payload
- 1) / adj_max_payload
;
1334 static unsigned int ether1394_encapsulate(struct sk_buff
*skb
,
1335 unsigned int max_payload
,
1336 union eth1394_hdr
*hdr
)
1338 union eth1394_hdr
*bufhdr
;
1339 int ftype
= hdr
->common
.lf
;
1340 int hdrsz
= hdr_type_len
[ftype
];
1341 unsigned int adj_max_payload
= max_payload
- hdrsz
;
1344 case ETH1394_HDR_LF_UF
:
1345 bufhdr
= (union eth1394_hdr
*)skb_push(skb
, hdrsz
);
1346 bufhdr
->words
.word1
= htons(hdr
->words
.word1
);
1347 bufhdr
->words
.word2
= hdr
->words
.word2
;
1350 case ETH1394_HDR_LF_FF
:
1351 bufhdr
= (union eth1394_hdr
*)skb_push(skb
, hdrsz
);
1352 bufhdr
->words
.word1
= htons(hdr
->words
.word1
);
1353 bufhdr
->words
.word2
= hdr
->words
.word2
;
1354 bufhdr
->words
.word3
= htons(hdr
->words
.word3
);
1355 bufhdr
->words
.word4
= 0;
1357 /* Set frag type here for future interior fragments */
1358 hdr
->common
.lf
= ETH1394_HDR_LF_IF
;
1363 hdr
->sf
.fg_off
+= adj_max_payload
;
1364 bufhdr
= (union eth1394_hdr
*)skb_pull(skb
, adj_max_payload
);
1365 if (max_payload
>= skb
->len
)
1366 hdr
->common
.lf
= ETH1394_HDR_LF_LF
;
1367 bufhdr
->words
.word1
= htons(hdr
->words
.word1
);
1368 bufhdr
->words
.word2
= htons(hdr
->words
.word2
);
1369 bufhdr
->words
.word3
= htons(hdr
->words
.word3
);
1370 bufhdr
->words
.word4
= 0;
1372 return min(max_payload
, skb
->len
);
1375 static struct hpsb_packet
*ether1394_alloc_common_packet(struct hpsb_host
*host
)
1377 struct hpsb_packet
*p
;
1379 p
= hpsb_alloc_packet(0);
1382 p
->generation
= get_hpsb_generation(host
);
1383 p
->type
= hpsb_async
;
1388 static int ether1394_prep_write_packet(struct hpsb_packet
*p
,
1389 struct hpsb_host
*host
, nodeid_t node
,
1390 u64 addr
, void *data
, int tx_len
)
1395 p
->tcode
= TCODE_WRITEB
;
1396 p
->header
[1] = host
->node_id
<< 16 | addr
>> 32;
1397 p
->header
[2] = addr
& 0xffffffff;
1399 p
->header_size
= 16;
1400 p
->expect_response
= 1;
1402 if (hpsb_get_tlabel(p
)) {
1403 ETH1394_PRINT_G(KERN_ERR
, "Out of tlabels\n");
1407 p
->node_id
<< 16 | p
->tlabel
<< 10 | 1 << 8 | TCODE_WRITEB
<< 4;
1409 p
->header
[3] = tx_len
<< 16;
1410 p
->data_size
= (tx_len
+ 3) & ~3;
1416 static void ether1394_prep_gasp_packet(struct hpsb_packet
*p
,
1417 struct eth1394_priv
*priv
,
1418 struct sk_buff
*skb
, int length
)
1421 p
->tcode
= TCODE_STREAM_DATA
;
1423 p
->header
[0] = length
<< 16 | 3 << 14 | priv
->broadcast_channel
<< 8 |
1424 TCODE_STREAM_DATA
<< 4;
1425 p
->data_size
= length
;
1426 p
->data
= (quadlet_t
*)skb
->data
- 2;
1427 p
->data
[0] = cpu_to_be32(priv
->host
->node_id
<< 16 |
1428 ETHER1394_GASP_SPECIFIER_ID_HI
);
1429 p
->data
[1] = cpu_to_be32(ETHER1394_GASP_SPECIFIER_ID_LO
<< 24 |
1430 ETHER1394_GASP_VERSION
);
1432 p
->speed_code
= priv
->bc_sspd
;
1434 /* prevent hpsb_send_packet() from overriding our speed code */
1435 p
->node_id
= LOCAL_BUS
| ALL_NODES
;
1438 static void ether1394_free_packet(struct hpsb_packet
*packet
)
1440 if (packet
->tcode
!= TCODE_STREAM_DATA
)
1441 hpsb_free_tlabel(packet
);
1442 hpsb_free_packet(packet
);
1445 static void ether1394_complete_cb(void *__ptask
);
1447 static int ether1394_send_packet(struct packet_task
*ptask
, unsigned int tx_len
)
1449 struct eth1394_priv
*priv
= ptask
->priv
;
1450 struct hpsb_packet
*packet
= NULL
;
1452 packet
= ether1394_alloc_common_packet(priv
->host
);
1456 if (ptask
->tx_type
== ETH1394_GASP
) {
1457 int length
= tx_len
+ 2 * sizeof(quadlet_t
);
1459 ether1394_prep_gasp_packet(packet
, priv
, ptask
->skb
, length
);
1460 } else if (ether1394_prep_write_packet(packet
, priv
->host
,
1462 ptask
->addr
, ptask
->skb
->data
,
1464 hpsb_free_packet(packet
);
1468 ptask
->packet
= packet
;
1469 hpsb_set_packet_complete_task(ptask
->packet
, ether1394_complete_cb
,
1472 if (hpsb_send_packet(packet
) < 0) {
1473 ether1394_free_packet(packet
);
1480 /* Task function to be run when a datagram transmission is completed */
1481 static void ether1394_dg_complete(struct packet_task
*ptask
, int fail
)
1483 struct sk_buff
*skb
= ptask
->skb
;
1484 struct eth1394_priv
*priv
= netdev_priv(skb
->dev
);
1485 unsigned long flags
;
1488 spin_lock_irqsave(&priv
->lock
, flags
);
1490 priv
->stats
.tx_dropped
++;
1491 priv
->stats
.tx_errors
++;
1493 priv
->stats
.tx_bytes
+= skb
->len
;
1494 priv
->stats
.tx_packets
++;
1496 spin_unlock_irqrestore(&priv
->lock
, flags
);
1498 dev_kfree_skb_any(skb
);
1499 kmem_cache_free(packet_task_cache
, ptask
);
1502 /* Callback for when a packet has been sent and the status of that packet is
1504 static void ether1394_complete_cb(void *__ptask
)
1506 struct packet_task
*ptask
= (struct packet_task
*)__ptask
;
1507 struct hpsb_packet
*packet
= ptask
->packet
;
1510 if (packet
->tcode
!= TCODE_STREAM_DATA
)
1511 fail
= hpsb_packet_success(packet
);
1513 ether1394_free_packet(packet
);
1515 ptask
->outstanding_pkts
--;
1516 if (ptask
->outstanding_pkts
> 0 && !fail
) {
1519 /* Add the encapsulation header to the fragment */
1520 tx_len
= ether1394_encapsulate(ptask
->skb
, ptask
->max_payload
,
1522 if (ether1394_send_packet(ptask
, tx_len
))
1523 ether1394_dg_complete(ptask
, 1);
1525 ether1394_dg_complete(ptask
, fail
);
1529 /* Transmit a packet (called by kernel) */
1530 static int ether1394_tx(struct sk_buff
*skb
, struct net_device
*dev
)
1532 struct eth1394hdr
*eth
;
1533 struct eth1394_priv
*priv
= netdev_priv(dev
);
1535 unsigned long flags
;
1537 eth1394_tx_type tx_type
;
1538 unsigned int tx_len
;
1539 unsigned int max_payload
;
1542 struct packet_task
*ptask
;
1543 struct eth1394_node_ref
*node
;
1544 struct eth1394_node_info
*node_info
= NULL
;
1546 ptask
= kmem_cache_alloc(packet_task_cache
, GFP_ATOMIC
);
1550 /* XXX Ignore this for now. Noticed that when MacOSX is the IRM,
1551 * it does not set our validity bit. We need to compensate for
1552 * that somewhere else, but not in eth1394. */
1554 if ((priv
->host
->csr
.broadcast_channel
& 0xc0000000) != 0xc0000000)
1558 skb
= skb_share_check(skb
, GFP_ATOMIC
);
1562 /* Get rid of the fake eth1394 header, but save a pointer */
1563 eth
= (struct eth1394hdr
*)skb
->data
;
1564 skb_pull(skb
, ETH1394_HLEN
);
1566 proto
= eth
->h_proto
;
1569 /* Set the transmission type for the packet. ARP packets and IP
1570 * broadcast packets are sent via GASP. */
1571 if (memcmp(eth
->h_dest
, dev
->broadcast
, ETH1394_ALEN
) == 0 ||
1572 proto
== htons(ETH_P_ARP
) ||
1573 (proto
== htons(ETH_P_IP
) &&
1574 IN_MULTICAST(ntohl(ip_hdr(skb
)->daddr
)))) {
1575 tx_type
= ETH1394_GASP
;
1576 dest_node
= LOCAL_BUS
| ALL_NODES
;
1577 max_payload
= priv
->bc_maxpayload
- ETHER1394_GASP_OVERHEAD
;
1578 BUG_ON(max_payload
< 512 - ETHER1394_GASP_OVERHEAD
);
1580 if (max_payload
< dg_size
+ hdr_type_len
[ETH1394_HDR_LF_UF
])
1583 __be64 guid
= get_unaligned((u64
*)eth
->h_dest
);
1585 node
= eth1394_find_node_guid(&priv
->ip_node_list
,
1591 (struct eth1394_node_info
*)node
->ud
->device
.driver_data
;
1592 if (node_info
->fifo
== CSR1212_INVALID_ADDR_SPACE
)
1595 dest_node
= node
->ud
->ne
->nodeid
;
1596 max_payload
= node_info
->maxpayload
;
1597 BUG_ON(max_payload
< 512 - ETHER1394_GASP_OVERHEAD
);
1599 dgl
= node_info
->dgl
;
1600 if (max_payload
< dg_size
+ hdr_type_len
[ETH1394_HDR_LF_UF
])
1602 tx_type
= ETH1394_WRREQ
;
1605 /* If this is an ARP packet, convert it */
1606 if (proto
== htons(ETH_P_ARP
))
1607 ether1394_arp_to_1394arp(skb
, dev
);
1609 ptask
->hdr
.words
.word1
= 0;
1610 ptask
->hdr
.words
.word2
= 0;
1611 ptask
->hdr
.words
.word3
= 0;
1612 ptask
->hdr
.words
.word4
= 0;
1615 ptask
->tx_type
= tx_type
;
1617 if (tx_type
!= ETH1394_GASP
) {
1620 spin_lock_irqsave(&priv
->lock
, flags
);
1621 addr
= node_info
->fifo
;
1622 spin_unlock_irqrestore(&priv
->lock
, flags
);
1625 ptask
->dest_node
= dest_node
;
1628 ptask
->tx_type
= tx_type
;
1629 ptask
->max_payload
= max_payload
;
1630 ptask
->outstanding_pkts
= ether1394_encapsulate_prep(max_payload
,
1631 proto
, &ptask
->hdr
, dg_size
, dgl
);
1633 /* Add the encapsulation header to the fragment */
1634 tx_len
= ether1394_encapsulate(skb
, max_payload
, &ptask
->hdr
);
1635 dev
->trans_start
= jiffies
;
1636 if (ether1394_send_packet(ptask
, tx_len
))
1639 netif_wake_queue(dev
);
1640 return NETDEV_TX_OK
;
1643 kmem_cache_free(packet_task_cache
, ptask
);
1648 spin_lock_irqsave(&priv
->lock
, flags
);
1649 priv
->stats
.tx_dropped
++;
1650 priv
->stats
.tx_errors
++;
1651 spin_unlock_irqrestore(&priv
->lock
, flags
);
1653 if (netif_queue_stopped(dev
))
1654 netif_wake_queue(dev
);
1657 * FIXME: According to a patch from 2003-02-26, "returning non-zero
1658 * causes serious problems" here, allegedly. Before that patch,
1659 * -ERRNO was returned which is not appropriate under Linux 2.6.
1660 * Perhaps more needs to be done? Stop the queue in serious
1661 * conditions and restart it elsewhere?
1663 /* return NETDEV_TX_BUSY; */
1664 return NETDEV_TX_OK
;
1667 static void ether1394_get_drvinfo(struct net_device
*dev
,
1668 struct ethtool_drvinfo
*info
)
1670 strcpy(info
->driver
, driver_name
);
1671 strcpy(info
->bus_info
, "ieee1394"); /* FIXME provide more detail? */
1674 static struct ethtool_ops ethtool_ops
= {
1675 .get_drvinfo
= ether1394_get_drvinfo
1678 static int __init
ether1394_init_module(void)
1682 packet_task_cache
= kmem_cache_create("packet_task",
1683 sizeof(struct packet_task
),
1685 if (!packet_task_cache
)
1688 hpsb_register_highlevel(ð1394_highlevel
);
1689 err
= hpsb_register_protocol(ð1394_proto_driver
);
1691 hpsb_unregister_highlevel(ð1394_highlevel
);
1692 kmem_cache_destroy(packet_task_cache
);
1697 static void __exit
ether1394_exit_module(void)
1699 hpsb_unregister_protocol(ð1394_proto_driver
);
1700 hpsb_unregister_highlevel(ð1394_highlevel
);
1701 kmem_cache_destroy(packet_task_cache
);
1704 module_init(ether1394_init_module
);
1705 module_exit(ether1394_exit_module
);