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/kernel.h>
47 #include <linux/slab.h>
48 #include <linux/errno.h>
49 #include <linux/types.h>
50 #include <linux/delay.h>
51 #include <linux/init.h>
53 #include <linux/netdevice.h>
54 #include <linux/inetdevice.h>
55 #include <linux/etherdevice.h>
56 #include <linux/if_arp.h>
57 #include <linux/if_ether.h>
60 #include <linux/tcp.h>
61 #include <linux/skbuff.h>
62 #include <linux/bitops.h>
63 #include <linux/ethtool.h>
64 #include <asm/uaccess.h>
65 #include <asm/delay.h>
66 #include <asm/unaligned.h>
69 #include "config_roms.h"
72 #include "highlevel.h"
74 #include "ieee1394_core.h"
75 #include "ieee1394_hotplug.h"
76 #include "ieee1394_transactions.h"
77 #include "ieee1394_types.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 struct fragment_info
{
92 struct list_head list
;
97 struct partial_datagram
{
98 struct list_head list
;
104 struct list_head frag_info
;
108 struct list_head list
; /* partial datagram list per node */
109 unsigned int sz
; /* partial datagram list size per node */
110 spinlock_t lock
; /* partial datagram lock */
113 struct eth1394_host_info
{
114 struct hpsb_host
*host
;
115 struct net_device
*dev
;
118 struct eth1394_node_ref
{
119 struct unit_directory
*ud
;
120 struct list_head list
;
123 struct eth1394_node_info
{
124 u16 maxpayload
; /* Max payload */
125 u8 sspd
; /* Max speed */
126 u64 fifo
; /* FIFO address */
127 struct pdg_list pdg
; /* partial RX datagram lists */
128 int dgl
; /* Outgoing datagram label */
131 /* Our ieee1394 highlevel driver */
132 #define ETH1394_DRIVER_NAME "eth1394"
133 static const char driver_name
[] = ETH1394_DRIVER_NAME
;
135 static struct kmem_cache
*packet_task_cache
;
137 static struct hpsb_highlevel eth1394_highlevel
;
139 /* Use common.lf to determine header len */
140 static const int hdr_type_len
[] = {
141 sizeof (struct eth1394_uf_hdr
),
142 sizeof (struct eth1394_ff_hdr
),
143 sizeof (struct eth1394_sf_hdr
),
144 sizeof (struct eth1394_sf_hdr
)
147 /* Change this to IEEE1394_SPEED_S100 to make testing easier */
148 #define ETH1394_SPEED_DEF IEEE1394_SPEED_MAX
150 /* For now, this needs to be 1500, so that XP works with us */
151 #define ETH1394_DATA_LEN ETH_DATA_LEN
153 static const u16 eth1394_speedto_maxpayload
[] = {
154 /* S100, S200, S400, S800, S1600, S3200 */
155 512, 1024, 2048, 4096, 4096, 4096
158 MODULE_AUTHOR("Ben Collins (bcollins@debian.org)");
159 MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)");
160 MODULE_LICENSE("GPL");
162 /* The max_partial_datagrams parameter is the maximum number of fragmented
163 * datagrams per node that eth1394 will keep in memory. Providing an upper
164 * bound allows us to limit the amount of memory that partial datagrams
165 * consume in the event that some partial datagrams are never completed.
167 static int max_partial_datagrams
= 25;
168 module_param(max_partial_datagrams
, int, S_IRUGO
| S_IWUSR
);
169 MODULE_PARM_DESC(max_partial_datagrams
,
170 "Maximum number of partially received fragmented datagrams "
174 static int ether1394_header(struct sk_buff
*skb
, struct net_device
*dev
,
175 unsigned short type
, void *daddr
, void *saddr
,
177 static int ether1394_rebuild_header(struct sk_buff
*skb
);
178 static int ether1394_header_parse(struct sk_buff
*skb
, unsigned char *haddr
);
179 static int ether1394_header_cache(struct neighbour
*neigh
, struct hh_cache
*hh
);
180 static void ether1394_header_cache_update(struct hh_cache
*hh
,
181 struct net_device
*dev
,
182 unsigned char * haddr
);
183 static int ether1394_mac_addr(struct net_device
*dev
, void *p
);
185 static void purge_partial_datagram(struct list_head
*old
);
186 static int ether1394_tx(struct sk_buff
*skb
, struct net_device
*dev
);
187 static void ether1394_iso(struct hpsb_iso
*iso
);
189 static struct ethtool_ops ethtool_ops
;
191 static int ether1394_write(struct hpsb_host
*host
, int srcid
, int destid
,
192 quadlet_t
*data
, u64 addr
, size_t len
, u16 flags
);
193 static void ether1394_add_host (struct hpsb_host
*host
);
194 static void ether1394_remove_host (struct hpsb_host
*host
);
195 static void ether1394_host_reset (struct hpsb_host
*host
);
197 /* Function for incoming 1394 packets */
198 static struct hpsb_address_ops addr_ops
= {
199 .write
= ether1394_write
,
202 /* Ieee1394 highlevel driver functions */
203 static struct hpsb_highlevel eth1394_highlevel
= {
205 .add_host
= ether1394_add_host
,
206 .remove_host
= ether1394_remove_host
,
207 .host_reset
= ether1394_host_reset
,
211 /* This is called after an "ifup" */
212 static int ether1394_open (struct net_device
*dev
)
214 struct eth1394_priv
*priv
= netdev_priv(dev
);
217 /* Something bad happened, don't even try */
218 if (priv
->bc_state
== ETHER1394_BC_ERROR
) {
219 /* we'll try again */
220 priv
->iso
= hpsb_iso_recv_init(priv
->host
,
221 ETHER1394_ISO_BUF_SIZE
,
222 ETHER1394_GASP_BUFFERS
,
223 priv
->broadcast_channel
,
224 HPSB_ISO_DMA_PACKET_PER_BUFFER
,
226 if (priv
->iso
== NULL
) {
227 ETH1394_PRINT(KERN_ERR
, dev
->name
,
228 "Could not allocate isochronous receive "
229 "context for the broadcast channel\n");
230 priv
->bc_state
= ETHER1394_BC_ERROR
;
233 if (hpsb_iso_recv_start(priv
->iso
, -1, (1 << 3), -1) < 0)
234 priv
->bc_state
= ETHER1394_BC_STOPPED
;
236 priv
->bc_state
= ETHER1394_BC_RUNNING
;
243 netif_start_queue (dev
);
247 /* This is called after an "ifdown" */
248 static int ether1394_stop (struct net_device
*dev
)
250 netif_stop_queue (dev
);
254 /* Return statistics to the caller */
255 static struct net_device_stats
*ether1394_stats (struct net_device
*dev
)
257 return &(((struct eth1394_priv
*)netdev_priv(dev
))->stats
);
260 /* What to do if we timeout. I think a host reset is probably in order, so
261 * that's what we do. Should we increment the stat counters too? */
262 static void ether1394_tx_timeout (struct net_device
*dev
)
264 ETH1394_PRINT (KERN_ERR
, dev
->name
, "Timeout, resetting host %s\n",
265 ((struct eth1394_priv
*)netdev_priv(dev
))->host
->driver
->name
);
267 highlevel_host_reset (((struct eth1394_priv
*)netdev_priv(dev
))->host
);
269 netif_wake_queue (dev
);
272 static int ether1394_change_mtu(struct net_device
*dev
, int new_mtu
)
274 struct eth1394_priv
*priv
= netdev_priv(dev
);
276 if ((new_mtu
< 68) ||
277 (new_mtu
> min(ETH1394_DATA_LEN
,
278 (int)((1 << (priv
->host
->csr
.max_rec
+ 1)) -
279 (sizeof(union eth1394_hdr
) +
280 ETHER1394_GASP_OVERHEAD
)))))
286 static void purge_partial_datagram(struct list_head
*old
)
288 struct partial_datagram
*pd
= list_entry(old
, struct partial_datagram
, list
);
289 struct list_head
*lh
, *n
;
291 list_for_each_safe(lh
, n
, &pd
->frag_info
) {
292 struct fragment_info
*fi
= list_entry(lh
, struct fragment_info
, list
);
301 /******************************************
302 * 1394 bus activity functions
303 ******************************************/
305 static struct eth1394_node_ref
*eth1394_find_node(struct list_head
*inl
,
306 struct unit_directory
*ud
)
308 struct eth1394_node_ref
*node
;
310 list_for_each_entry(node
, inl
, list
)
317 static struct eth1394_node_ref
*eth1394_find_node_guid(struct list_head
*inl
,
320 struct eth1394_node_ref
*node
;
322 list_for_each_entry(node
, inl
, list
)
323 if (node
->ud
->ne
->guid
== guid
)
329 static struct eth1394_node_ref
*eth1394_find_node_nodeid(struct list_head
*inl
,
332 struct eth1394_node_ref
*node
;
333 list_for_each_entry(node
, inl
, list
) {
334 if (node
->ud
->ne
->nodeid
== nodeid
)
341 static int eth1394_probe(struct device
*dev
)
343 struct unit_directory
*ud
;
344 struct eth1394_host_info
*hi
;
345 struct eth1394_priv
*priv
;
346 struct eth1394_node_ref
*new_node
;
347 struct eth1394_node_info
*node_info
;
349 ud
= container_of(dev
, struct unit_directory
, device
);
351 hi
= hpsb_get_hostinfo(ð1394_highlevel
, ud
->ne
->host
);
355 new_node
= kmalloc(sizeof(*new_node
),
356 in_interrupt() ? GFP_ATOMIC
: GFP_KERNEL
);
360 node_info
= kmalloc(sizeof(*node_info
),
361 in_interrupt() ? GFP_ATOMIC
: GFP_KERNEL
);
367 spin_lock_init(&node_info
->pdg
.lock
);
368 INIT_LIST_HEAD(&node_info
->pdg
.list
);
369 node_info
->pdg
.sz
= 0;
370 node_info
->fifo
= CSR1212_INVALID_ADDR_SPACE
;
372 ud
->device
.driver_data
= node_info
;
375 priv
= netdev_priv(hi
->dev
);
376 list_add_tail(&new_node
->list
, &priv
->ip_node_list
);
381 static int eth1394_remove(struct device
*dev
)
383 struct unit_directory
*ud
;
384 struct eth1394_host_info
*hi
;
385 struct eth1394_priv
*priv
;
386 struct eth1394_node_ref
*old_node
;
387 struct eth1394_node_info
*node_info
;
388 struct list_head
*lh
, *n
;
391 ud
= container_of(dev
, struct unit_directory
, device
);
392 hi
= hpsb_get_hostinfo(ð1394_highlevel
, ud
->ne
->host
);
396 priv
= netdev_priv(hi
->dev
);
398 old_node
= eth1394_find_node(&priv
->ip_node_list
, ud
);
401 list_del(&old_node
->list
);
404 node_info
= (struct eth1394_node_info
*)ud
->device
.driver_data
;
406 spin_lock_irqsave(&node_info
->pdg
.lock
, flags
);
407 /* The partial datagram list should be empty, but we'll just
408 * make sure anyway... */
409 list_for_each_safe(lh
, n
, &node_info
->pdg
.list
) {
410 purge_partial_datagram(lh
);
412 spin_unlock_irqrestore(&node_info
->pdg
.lock
, flags
);
415 ud
->device
.driver_data
= NULL
;
420 static int eth1394_update(struct unit_directory
*ud
)
422 struct eth1394_host_info
*hi
;
423 struct eth1394_priv
*priv
;
424 struct eth1394_node_ref
*node
;
425 struct eth1394_node_info
*node_info
;
427 hi
= hpsb_get_hostinfo(ð1394_highlevel
, ud
->ne
->host
);
431 priv
= netdev_priv(hi
->dev
);
433 node
= eth1394_find_node(&priv
->ip_node_list
, ud
);
436 node
= kmalloc(sizeof(*node
),
437 in_interrupt() ? GFP_ATOMIC
: GFP_KERNEL
);
441 node_info
= kmalloc(sizeof(*node_info
),
442 in_interrupt() ? GFP_ATOMIC
: GFP_KERNEL
);
448 spin_lock_init(&node_info
->pdg
.lock
);
449 INIT_LIST_HEAD(&node_info
->pdg
.list
);
450 node_info
->pdg
.sz
= 0;
452 ud
->device
.driver_data
= node_info
;
455 priv
= netdev_priv(hi
->dev
);
456 list_add_tail(&node
->list
, &priv
->ip_node_list
);
463 static struct ieee1394_device_id eth1394_id_table
[] = {
465 .match_flags
= (IEEE1394_MATCH_SPECIFIER_ID
|
466 IEEE1394_MATCH_VERSION
),
467 .specifier_id
= ETHER1394_GASP_SPECIFIER_ID
,
468 .version
= ETHER1394_GASP_VERSION
,
473 MODULE_DEVICE_TABLE(ieee1394
, eth1394_id_table
);
475 static struct hpsb_protocol_driver eth1394_proto_driver
= {
476 .name
= ETH1394_DRIVER_NAME
,
477 .id_table
= eth1394_id_table
,
478 .update
= eth1394_update
,
480 .probe
= eth1394_probe
,
481 .remove
= eth1394_remove
,
486 static void ether1394_reset_priv (struct net_device
*dev
, int set_mtu
)
490 struct eth1394_priv
*priv
= netdev_priv(dev
);
491 struct hpsb_host
*host
= priv
->host
;
492 u64 guid
= get_unaligned((u64
*)&(host
->csr
.rom
->bus_info_data
[3]));
493 u16 maxpayload
= 1 << (host
->csr
.max_rec
+ 1);
494 int max_speed
= IEEE1394_SPEED_MAX
;
496 spin_lock_irqsave (&priv
->lock
, flags
);
498 memset(priv
->ud_list
, 0, sizeof(struct node_entry
*) * ALL_NODES
);
499 priv
->bc_maxpayload
= 512;
501 /* Determine speed limit */
502 for (i
= 0; i
< host
->node_count
; i
++)
503 if (max_speed
> host
->speed
[i
])
504 max_speed
= host
->speed
[i
];
505 priv
->bc_sspd
= max_speed
;
507 /* We'll use our maxpayload as the default mtu */
509 dev
->mtu
= min(ETH1394_DATA_LEN
,
511 (sizeof(union eth1394_hdr
) +
512 ETHER1394_GASP_OVERHEAD
)));
514 /* Set our hardware address while we're at it */
515 memcpy(dev
->dev_addr
, &guid
, sizeof(u64
));
516 memset(dev
->broadcast
, 0xff, sizeof(u64
));
519 spin_unlock_irqrestore (&priv
->lock
, flags
);
522 /* This function is called right before register_netdev */
523 static void ether1394_init_dev (struct net_device
*dev
)
526 dev
->open
= ether1394_open
;
527 dev
->stop
= ether1394_stop
;
528 dev
->hard_start_xmit
= ether1394_tx
;
529 dev
->get_stats
= ether1394_stats
;
530 dev
->tx_timeout
= ether1394_tx_timeout
;
531 dev
->change_mtu
= ether1394_change_mtu
;
533 dev
->hard_header
= ether1394_header
;
534 dev
->rebuild_header
= ether1394_rebuild_header
;
535 dev
->hard_header_cache
= ether1394_header_cache
;
536 dev
->header_cache_update
= ether1394_header_cache_update
;
537 dev
->hard_header_parse
= ether1394_header_parse
;
538 dev
->set_mac_address
= ether1394_mac_addr
;
539 SET_ETHTOOL_OPS(dev
, ðtool_ops
);
542 dev
->watchdog_timeo
= ETHER1394_TIMEOUT
;
543 dev
->flags
= IFF_BROADCAST
| IFF_MULTICAST
;
544 dev
->features
= NETIF_F_HIGHDMA
;
545 dev
->addr_len
= ETH1394_ALEN
;
546 dev
->hard_header_len
= ETH1394_HLEN
;
547 dev
->type
= ARPHRD_IEEE1394
;
549 ether1394_reset_priv (dev
, 1);
553 * This function is called every time a card is found. It is generally called
554 * when the module is installed. This is where we add all of our ethernet
555 * devices. One for each host.
557 static void ether1394_add_host (struct hpsb_host
*host
)
559 struct eth1394_host_info
*hi
= NULL
;
560 struct net_device
*dev
= NULL
;
561 struct eth1394_priv
*priv
;
564 if (!(host
->config_roms
& HPSB_CONFIG_ROM_ENTRY_IP1394
))
567 fifo_addr
= hpsb_allocate_and_register_addrspace(
568 ð1394_highlevel
, host
, &addr_ops
,
569 ETHER1394_REGION_ADDR_LEN
, ETHER1394_REGION_ADDR_LEN
,
570 CSR1212_INVALID_ADDR_SPACE
, CSR1212_INVALID_ADDR_SPACE
);
571 if (fifo_addr
== CSR1212_INVALID_ADDR_SPACE
)
574 /* We should really have our own alloc_hpsbdev() function in
575 * net_init.c instead of calling the one for ethernet then hijacking
576 * it for ourselves. That way we'd be a real networking device. */
577 dev
= alloc_etherdev(sizeof (struct eth1394_priv
));
580 ETH1394_PRINT_G (KERN_ERR
, "Out of memory trying to allocate "
581 "etherdevice for IEEE 1394 device %s-%d\n",
582 host
->driver
->name
, host
->id
);
586 SET_MODULE_OWNER(dev
);
588 /* FIXME - Is this the correct parent device anyway? */
589 SET_NETDEV_DEV(dev
, &host
->device
);
592 priv
= netdev_priv(dev
);
594 INIT_LIST_HEAD(&priv
->ip_node_list
);
596 spin_lock_init(&priv
->lock
);
598 priv
->local_fifo
= fifo_addr
;
600 hi
= hpsb_create_hostinfo(ð1394_highlevel
, host
, sizeof(*hi
));
603 ETH1394_PRINT_G (KERN_ERR
, "Out of memory trying to create "
604 "hostinfo for IEEE 1394 device %s-%d\n",
605 host
->driver
->name
, host
->id
);
609 ether1394_init_dev(dev
);
611 if (register_netdev (dev
)) {
612 ETH1394_PRINT (KERN_ERR
, dev
->name
, "Error registering network driver\n");
616 ETH1394_PRINT (KERN_INFO
, dev
->name
, "IEEE-1394 IPv4 over 1394 Ethernet (fw-host%d)\n",
622 /* Ignore validity in hopes that it will be set in the future. It'll
623 * be checked when the eth device is opened. */
624 priv
->broadcast_channel
= host
->csr
.broadcast_channel
& 0x3f;
626 priv
->iso
= hpsb_iso_recv_init(host
,
627 ETHER1394_ISO_BUF_SIZE
,
628 ETHER1394_GASP_BUFFERS
,
629 priv
->broadcast_channel
,
630 HPSB_ISO_DMA_PACKET_PER_BUFFER
,
632 if (priv
->iso
== NULL
) {
633 ETH1394_PRINT(KERN_ERR
, dev
->name
,
634 "Could not allocate isochronous receive context "
635 "for the broadcast channel\n");
636 priv
->bc_state
= ETHER1394_BC_ERROR
;
638 if (hpsb_iso_recv_start(priv
->iso
, -1, (1 << 3), -1) < 0)
639 priv
->bc_state
= ETHER1394_BC_STOPPED
;
641 priv
->bc_state
= ETHER1394_BC_RUNNING
;
650 hpsb_destroy_hostinfo(ð1394_highlevel
, host
);
655 /* Remove a card from our list */
656 static void ether1394_remove_host (struct hpsb_host
*host
)
658 struct eth1394_host_info
*hi
;
660 hi
= hpsb_get_hostinfo(ð1394_highlevel
, host
);
662 struct eth1394_priv
*priv
= netdev_priv(hi
->dev
);
664 hpsb_unregister_addrspace(ð1394_highlevel
, host
,
667 if (priv
->iso
!= NULL
)
668 hpsb_iso_shutdown(priv
->iso
);
671 unregister_netdev (hi
->dev
);
672 free_netdev(hi
->dev
);
679 /* A reset has just arisen */
680 static void ether1394_host_reset (struct hpsb_host
*host
)
682 struct eth1394_host_info
*hi
;
683 struct eth1394_priv
*priv
;
684 struct net_device
*dev
;
685 struct list_head
*lh
, *n
;
686 struct eth1394_node_ref
*node
;
687 struct eth1394_node_info
*node_info
;
690 hi
= hpsb_get_hostinfo(ð1394_highlevel
, host
);
692 /* This can happen for hosts that we don't use */
697 priv
= (struct eth1394_priv
*)netdev_priv(dev
);
699 /* Reset our private host data, but not our mtu */
700 netif_stop_queue (dev
);
701 ether1394_reset_priv (dev
, 0);
703 list_for_each_entry(node
, &priv
->ip_node_list
, list
) {
704 node_info
= (struct eth1394_node_info
*)node
->ud
->device
.driver_data
;
706 spin_lock_irqsave(&node_info
->pdg
.lock
, flags
);
708 list_for_each_safe(lh
, n
, &node_info
->pdg
.list
) {
709 purge_partial_datagram(lh
);
712 INIT_LIST_HEAD(&(node_info
->pdg
.list
));
713 node_info
->pdg
.sz
= 0;
715 spin_unlock_irqrestore(&node_info
->pdg
.lock
, flags
);
718 netif_wake_queue (dev
);
721 /******************************************
722 * HW Header net device functions
723 ******************************************/
724 /* These functions have been adapted from net/ethernet/eth.c */
727 /* Create a fake MAC header for an arbitrary protocol layer.
728 * saddr=NULL means use device source address
729 * daddr=NULL means leave destination address (eg unresolved arp). */
730 static int ether1394_header(struct sk_buff
*skb
, struct net_device
*dev
,
731 unsigned short type
, void *daddr
, void *saddr
,
734 struct eth1394hdr
*eth
= (struct eth1394hdr
*)skb_push(skb
, ETH1394_HLEN
);
736 eth
->h_proto
= htons(type
);
738 if (dev
->flags
& (IFF_LOOPBACK
|IFF_NOARP
)) {
739 memset(eth
->h_dest
, 0, dev
->addr_len
);
740 return(dev
->hard_header_len
);
744 memcpy(eth
->h_dest
,daddr
,dev
->addr_len
);
745 return dev
->hard_header_len
;
748 return -dev
->hard_header_len
;
753 /* Rebuild the faked MAC header. This is called after an ARP
754 * (or in future other address resolution) has completed on this
755 * sk_buff. We now let ARP fill in the other fields.
757 * This routine CANNOT use cached dst->neigh!
758 * Really, it is used only when dst->neigh is wrong.
760 static int ether1394_rebuild_header(struct sk_buff
*skb
)
762 struct eth1394hdr
*eth
= (struct eth1394hdr
*)skb
->data
;
763 struct net_device
*dev
= skb
->dev
;
765 switch (eth
->h_proto
) {
768 case __constant_htons(ETH_P_IP
):
769 return arp_find((unsigned char*)ð
->h_dest
, skb
);
772 ETH1394_PRINT(KERN_DEBUG
, dev
->name
,
773 "unable to resolve type %04x addresses.\n",
774 ntohs(eth
->h_proto
));
781 static int ether1394_header_parse(struct sk_buff
*skb
, unsigned char *haddr
)
783 struct net_device
*dev
= skb
->dev
;
784 memcpy(haddr
, dev
->dev_addr
, ETH1394_ALEN
);
789 static int ether1394_header_cache(struct neighbour
*neigh
, struct hh_cache
*hh
)
791 unsigned short type
= hh
->hh_type
;
792 struct eth1394hdr
*eth
= (struct eth1394hdr
*)(((u8
*)hh
->hh_data
) +
793 (16 - ETH1394_HLEN
));
794 struct net_device
*dev
= neigh
->dev
;
796 if (type
== htons(ETH_P_802_3
))
800 memcpy(eth
->h_dest
, neigh
->ha
, dev
->addr_len
);
802 hh
->hh_len
= ETH1394_HLEN
;
806 /* Called by Address Resolution module to notify changes in address. */
807 static void ether1394_header_cache_update(struct hh_cache
*hh
,
808 struct net_device
*dev
,
809 unsigned char * haddr
)
811 memcpy(((u8
*)hh
->hh_data
) + (16 - ETH1394_HLEN
), haddr
, dev
->addr_len
);
814 static int ether1394_mac_addr(struct net_device
*dev
, void *p
)
816 if (netif_running(dev
))
819 /* Not going to allow setting the MAC address, we really need to use
820 * the real one supplied by the hardware */
826 /******************************************
827 * Datagram reception code
828 ******************************************/
830 /* Copied from net/ethernet/eth.c */
831 static inline u16
ether1394_type_trans(struct sk_buff
*skb
,
832 struct net_device
*dev
)
834 struct eth1394hdr
*eth
;
837 skb_reset_mac_header(skb
);
838 skb_pull (skb
, ETH1394_HLEN
);
839 eth
= eth1394_hdr(skb
);
841 if (*eth
->h_dest
& 1) {
842 if (memcmp(eth
->h_dest
, dev
->broadcast
, dev
->addr_len
)==0)
843 skb
->pkt_type
= PACKET_BROADCAST
;
846 skb
->pkt_type
= PACKET_MULTICAST
;
849 if (memcmp(eth
->h_dest
, dev
->dev_addr
, dev
->addr_len
))
850 skb
->pkt_type
= PACKET_OTHERHOST
;
853 if (ntohs (eth
->h_proto
) >= 1536)
858 if (*(unsigned short *)rawp
== 0xFFFF)
859 return htons (ETH_P_802_3
);
861 return htons (ETH_P_802_2
);
864 /* Parse an encapsulated IP1394 header into an ethernet frame packet.
865 * We also perform ARP translation here, if need be. */
866 static inline u16
ether1394_parse_encap(struct sk_buff
*skb
,
867 struct net_device
*dev
,
868 nodeid_t srcid
, nodeid_t destid
,
871 struct eth1394_priv
*priv
= netdev_priv(dev
);
873 unsigned short ret
= 0;
875 /* Setup our hw addresses. We use these to build the
876 * ethernet header. */
877 if (destid
== (LOCAL_BUS
| ALL_NODES
))
878 dest_hw
= ~0ULL; /* broadcast */
880 dest_hw
= cpu_to_be64((((u64
)priv
->host
->csr
.guid_hi
) << 32) |
881 priv
->host
->csr
.guid_lo
);
883 /* If this is an ARP packet, convert it. First, we want to make
884 * use of some of the fields, since they tell us a little bit
885 * about the sending machine. */
886 if (ether_type
== htons(ETH_P_ARP
)) {
887 struct eth1394_arp
*arp1394
= (struct eth1394_arp
*)skb
->data
;
888 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
889 unsigned char *arp_ptr
= (unsigned char *)(arp
+ 1);
890 u64 fifo_addr
= (u64
)ntohs(arp1394
->fifo_hi
) << 32 |
891 ntohl(arp1394
->fifo_lo
);
892 u8 max_rec
= min(priv
->host
->csr
.max_rec
,
893 (u8
)(arp1394
->max_rec
));
894 int sspd
= arp1394
->sspd
;
896 struct eth1394_node_ref
*node
;
897 struct eth1394_node_info
*node_info
;
900 /* Sanity check. MacOSX seems to be sending us 131 in this
901 * field (atleast on my Panther G5). Not sure why. */
902 if (sspd
> 5 || sspd
< 0)
905 maxpayload
= min(eth1394_speedto_maxpayload
[sspd
], (u16
)(1 << (max_rec
+ 1)));
907 guid
= get_unaligned(&arp1394
->s_uniq_id
);
908 node
= eth1394_find_node_guid(&priv
->ip_node_list
,
914 node_info
= (struct eth1394_node_info
*)node
->ud
->device
.driver_data
;
916 /* Update our speed/payload/fifo_offset table */
917 node_info
->maxpayload
= maxpayload
;
918 node_info
->sspd
= sspd
;
919 node_info
->fifo
= fifo_addr
;
921 /* Now that we're done with the 1394 specific stuff, we'll
922 * need to alter some of the data. Believe it or not, all
923 * that needs to be done is sender_IP_address needs to be
924 * moved, the destination hardware address get stuffed
925 * in and the hardware address length set to 8.
927 * IMPORTANT: The code below overwrites 1394 specific data
928 * needed above so keep the munging of the data for the
929 * higher level IP stack last. */
932 arp_ptr
+= arp
->ar_hln
; /* skip over sender unique id */
933 *(u32
*)arp_ptr
= arp1394
->sip
; /* move sender IP addr */
934 arp_ptr
+= arp
->ar_pln
; /* skip over sender IP addr */
936 if (arp
->ar_op
== htons(ARPOP_REQUEST
))
937 memset(arp_ptr
, 0, sizeof(u64
));
939 memcpy(arp_ptr
, dev
->dev_addr
, sizeof(u64
));
942 /* Now add the ethernet header. */
943 if (dev
->hard_header(skb
, dev
, ntohs(ether_type
), &dest_hw
, NULL
,
945 ret
= ether1394_type_trans(skb
, dev
);
950 static inline int fragment_overlap(struct list_head
*frag_list
, int offset
, int len
)
952 struct fragment_info
*fi
;
954 list_for_each_entry(fi
, frag_list
, list
) {
955 if ( ! ((offset
> (fi
->offset
+ fi
->len
- 1)) ||
956 ((offset
+ len
- 1) < fi
->offset
)))
962 static inline struct list_head
*find_partial_datagram(struct list_head
*pdgl
, int dgl
)
964 struct partial_datagram
*pd
;
966 list_for_each_entry(pd
, pdgl
, list
) {
973 /* Assumes that new fragment does not overlap any existing fragments */
974 static inline int new_fragment(struct list_head
*frag_info
, int offset
, int len
)
976 struct list_head
*lh
;
977 struct fragment_info
*fi
, *fi2
, *new;
979 list_for_each(lh
, frag_info
) {
980 fi
= list_entry(lh
, struct fragment_info
, list
);
981 if ((fi
->offset
+ fi
->len
) == offset
) {
982 /* The new fragment can be tacked on to the end */
984 /* Did the new fragment plug a hole? */
985 fi2
= list_entry(lh
->next
, struct fragment_info
, list
);
986 if ((fi
->offset
+ fi
->len
) == fi2
->offset
) {
987 /* glue fragments together */
993 } else if ((offset
+ len
) == fi
->offset
) {
994 /* The new fragment can be tacked on to the beginning */
997 /* Did the new fragment plug a hole? */
998 fi2
= list_entry(lh
->prev
, struct fragment_info
, list
);
999 if ((fi2
->offset
+ fi2
->len
) == fi
->offset
) {
1000 /* glue fragments together */
1001 fi2
->len
+= fi
->len
;
1006 } else if (offset
> (fi
->offset
+ fi
->len
)) {
1008 } else if ((offset
+ len
) < fi
->offset
) {
1014 new = kmalloc(sizeof(*new), GFP_ATOMIC
);
1018 new->offset
= offset
;
1021 list_add(&new->list
, lh
);
1026 static inline int new_partial_datagram(struct net_device
*dev
,
1027 struct list_head
*pdgl
, int dgl
,
1028 int dg_size
, char *frag_buf
,
1029 int frag_off
, int frag_len
)
1031 struct partial_datagram
*new;
1033 new = kmalloc(sizeof(*new), GFP_ATOMIC
);
1037 INIT_LIST_HEAD(&new->frag_info
);
1039 if (new_fragment(&new->frag_info
, frag_off
, frag_len
) < 0) {
1045 new->dg_size
= dg_size
;
1047 new->skb
= dev_alloc_skb(dg_size
+ dev
->hard_header_len
+ 15);
1049 struct fragment_info
*fi
= list_entry(new->frag_info
.next
,
1050 struct fragment_info
,
1057 skb_reserve(new->skb
, (dev
->hard_header_len
+ 15) & ~15);
1058 new->pbuf
= skb_put(new->skb
, dg_size
);
1059 memcpy(new->pbuf
+ frag_off
, frag_buf
, frag_len
);
1061 list_add(&new->list
, pdgl
);
1066 static inline int update_partial_datagram(struct list_head
*pdgl
, struct list_head
*lh
,
1067 char *frag_buf
, int frag_off
, int frag_len
)
1069 struct partial_datagram
*pd
= list_entry(lh
, struct partial_datagram
, list
);
1071 if (new_fragment(&pd
->frag_info
, frag_off
, frag_len
) < 0) {
1075 memcpy(pd
->pbuf
+ frag_off
, frag_buf
, frag_len
);
1077 /* Move list entry to beginnig of list so that oldest partial
1078 * datagrams percolate to the end of the list */
1079 list_move(lh
, pdgl
);
1084 static inline int is_datagram_complete(struct list_head
*lh
, int dg_size
)
1086 struct partial_datagram
*pd
= list_entry(lh
, struct partial_datagram
, list
);
1087 struct fragment_info
*fi
= list_entry(pd
->frag_info
.next
,
1088 struct fragment_info
, list
);
1090 return (fi
->len
== dg_size
);
1093 /* Packet reception. We convert the IP1394 encapsulation header to an
1094 * ethernet header, and fill it with some of our other fields. This is
1095 * an incoming packet from the 1394 bus. */
1096 static int ether1394_data_handler(struct net_device
*dev
, int srcid
, int destid
,
1099 struct sk_buff
*skb
;
1100 unsigned long flags
;
1101 struct eth1394_priv
*priv
= netdev_priv(dev
);
1102 union eth1394_hdr
*hdr
= (union eth1394_hdr
*)buf
;
1103 u16 ether_type
= 0; /* initialized to clear warning */
1105 struct unit_directory
*ud
= priv
->ud_list
[NODEID_TO_NODE(srcid
)];
1106 struct eth1394_node_info
*node_info
;
1109 struct eth1394_node_ref
*node
;
1110 node
= eth1394_find_node_nodeid(&priv
->ip_node_list
, srcid
);
1112 HPSB_PRINT(KERN_ERR
, "ether1394 rx: sender nodeid "
1113 "lookup failure: " NODE_BUS_FMT
,
1114 NODE_BUS_ARGS(priv
->host
, srcid
));
1115 priv
->stats
.rx_dropped
++;
1120 priv
->ud_list
[NODEID_TO_NODE(srcid
)] = ud
;
1123 node_info
= (struct eth1394_node_info
*)ud
->device
.driver_data
;
1125 /* First, did we receive a fragmented or unfragmented datagram? */
1126 hdr
->words
.word1
= ntohs(hdr
->words
.word1
);
1128 hdr_len
= hdr_type_len
[hdr
->common
.lf
];
1130 if (hdr
->common
.lf
== ETH1394_HDR_LF_UF
) {
1131 /* An unfragmented datagram has been received by the ieee1394
1132 * bus. Build an skbuff around it so we can pass it to the
1133 * high level network layer. */
1135 skb
= dev_alloc_skb(len
+ dev
->hard_header_len
+ 15);
1137 HPSB_PRINT (KERN_ERR
, "ether1394 rx: low on mem\n");
1138 priv
->stats
.rx_dropped
++;
1141 skb_reserve(skb
, (dev
->hard_header_len
+ 15) & ~15);
1142 memcpy(skb_put(skb
, len
- hdr_len
), buf
+ hdr_len
, len
- hdr_len
);
1143 ether_type
= hdr
->uf
.ether_type
;
1145 /* A datagram fragment has been received, now the fun begins. */
1147 struct list_head
*pdgl
, *lh
;
1148 struct partial_datagram
*pd
;
1150 int fg_len
= len
- hdr_len
;
1154 struct pdg_list
*pdg
= &(node_info
->pdg
);
1156 hdr
->words
.word3
= ntohs(hdr
->words
.word3
);
1157 /* The 4th header word is reserved so no need to do ntohs() */
1159 if (hdr
->common
.lf
== ETH1394_HDR_LF_FF
) {
1160 ether_type
= hdr
->ff
.ether_type
;
1162 dg_size
= hdr
->ff
.dg_size
+ 1;
1165 hdr
->words
.word2
= ntohs(hdr
->words
.word2
);
1167 dg_size
= hdr
->sf
.dg_size
+ 1;
1168 fg_off
= hdr
->sf
.fg_off
;
1170 spin_lock_irqsave(&pdg
->lock
, flags
);
1172 pdgl
= &(pdg
->list
);
1173 lh
= find_partial_datagram(pdgl
, dgl
);
1176 while (pdg
->sz
>= max_partial_datagrams
) {
1177 /* remove the oldest */
1178 purge_partial_datagram(pdgl
->prev
);
1182 retval
= new_partial_datagram(dev
, pdgl
, dgl
, dg_size
,
1183 buf
+ hdr_len
, fg_off
,
1186 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1190 lh
= find_partial_datagram(pdgl
, dgl
);
1192 struct partial_datagram
*pd
;
1194 pd
= list_entry(lh
, struct partial_datagram
, list
);
1196 if (fragment_overlap(&pd
->frag_info
, fg_off
, fg_len
)) {
1197 /* Overlapping fragments, obliterate old
1198 * datagram and start new one. */
1199 purge_partial_datagram(lh
);
1200 retval
= new_partial_datagram(dev
, pdgl
, dgl
,
1206 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1210 retval
= update_partial_datagram(pdgl
, lh
,
1214 /* Couldn't save off fragment anyway
1215 * so might as well obliterate the
1217 purge_partial_datagram(lh
);
1219 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1222 } /* fragment overlap */
1223 } /* new datagram or add to existing one */
1225 pd
= list_entry(lh
, struct partial_datagram
, list
);
1227 if (hdr
->common
.lf
== ETH1394_HDR_LF_FF
) {
1228 pd
->ether_type
= ether_type
;
1231 if (is_datagram_complete(lh
, dg_size
)) {
1232 ether_type
= pd
->ether_type
;
1234 skb
= skb_get(pd
->skb
);
1235 purge_partial_datagram(lh
);
1236 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1238 /* Datagram is not complete, we're done for the
1240 spin_unlock_irqrestore(&pdg
->lock
, flags
);
1243 } /* unframgented datagram or fragmented one */
1245 /* Write metadata, and then pass to the receive level */
1247 skb
->ip_summed
= CHECKSUM_UNNECESSARY
; /* don't check it */
1249 /* Parse the encapsulation header. This actually does the job of
1250 * converting to an ethernet frame header, aswell as arp
1251 * conversion if needed. ARP conversion is easier in this
1252 * direction, since we are using ethernet as our backend. */
1253 skb
->protocol
= ether1394_parse_encap(skb
, dev
, srcid
, destid
,
1257 spin_lock_irqsave(&priv
->lock
, flags
);
1258 if (!skb
->protocol
) {
1259 priv
->stats
.rx_errors
++;
1260 priv
->stats
.rx_dropped
++;
1261 dev_kfree_skb_any(skb
);
1265 if (netif_rx(skb
) == NET_RX_DROP
) {
1266 priv
->stats
.rx_errors
++;
1267 priv
->stats
.rx_dropped
++;
1272 priv
->stats
.rx_packets
++;
1273 priv
->stats
.rx_bytes
+= skb
->len
;
1276 if (netif_queue_stopped(dev
))
1277 netif_wake_queue(dev
);
1278 spin_unlock_irqrestore(&priv
->lock
, flags
);
1280 dev
->last_rx
= jiffies
;
1285 static int ether1394_write(struct hpsb_host
*host
, int srcid
, int destid
,
1286 quadlet_t
*data
, u64 addr
, size_t len
, u16 flags
)
1288 struct eth1394_host_info
*hi
;
1290 hi
= hpsb_get_hostinfo(ð1394_highlevel
, host
);
1292 ETH1394_PRINT_G(KERN_ERR
, "Could not find net device for host %s\n",
1293 host
->driver
->name
);
1294 return RCODE_ADDRESS_ERROR
;
1297 if (ether1394_data_handler(hi
->dev
, srcid
, destid
, (char*)data
, len
))
1298 return RCODE_ADDRESS_ERROR
;
1300 return RCODE_COMPLETE
;
1303 static void ether1394_iso(struct hpsb_iso
*iso
)
1307 struct eth1394_host_info
*hi
;
1308 struct net_device
*dev
;
1309 struct eth1394_priv
*priv
;
1316 hi
= hpsb_get_hostinfo(ð1394_highlevel
, iso
->host
);
1318 ETH1394_PRINT_G(KERN_ERR
, "Could not find net device for host %s\n",
1319 iso
->host
->driver
->name
);
1325 nready
= hpsb_iso_n_ready(iso
);
1326 for (i
= 0; i
< nready
; i
++) {
1327 struct hpsb_iso_packet_info
*info
=
1328 &iso
->infos
[(iso
->first_packet
+ i
) % iso
->buf_packets
];
1329 data
= (quadlet_t
*) (iso
->data_buf
.kvirt
+ info
->offset
);
1331 /* skip over GASP header */
1332 buf
= (char *)data
+ 8;
1333 len
= info
->len
- 8;
1335 specifier_id
= (((be32_to_cpu(data
[0]) & 0xffff) << 8) |
1336 ((be32_to_cpu(data
[1]) & 0xff000000) >> 24));
1337 source_id
= be32_to_cpu(data
[0]) >> 16;
1339 priv
= netdev_priv(dev
);
1341 if (info
->channel
!= (iso
->host
->csr
.broadcast_channel
& 0x3f) ||
1342 specifier_id
!= ETHER1394_GASP_SPECIFIER_ID
) {
1343 /* This packet is not for us */
1346 ether1394_data_handler(dev
, source_id
, LOCAL_BUS
| ALL_NODES
,
1350 hpsb_iso_recv_release_packets(iso
, i
);
1352 dev
->last_rx
= jiffies
;
1355 /******************************************
1356 * Datagram transmission code
1357 ******************************************/
1359 /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire
1360 * arphdr) is the same format as the ip1394 header, so they overlap. The rest
1361 * needs to be munged a bit. The remainder of the arphdr is formatted based
1362 * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to
1365 * Now that the EUI is used for the hardware address all we need to do to make
1366 * this work for 1394 is to insert 2 quadlets that contain max_rec size,
1367 * speed, and unicast FIFO address information between the sender_unique_id
1368 * and the IP addresses.
1370 static inline void ether1394_arp_to_1394arp(struct sk_buff
*skb
,
1371 struct net_device
*dev
)
1373 struct eth1394_priv
*priv
= netdev_priv(dev
);
1375 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
1376 unsigned char *arp_ptr
= (unsigned char *)(arp
+ 1);
1377 struct eth1394_arp
*arp1394
= (struct eth1394_arp
*)skb
->data
;
1379 /* Believe it or not, all that need to happen is sender IP get moved
1380 * and set hw_addr_len, max_rec, sspd, fifo_hi and fifo_lo. */
1381 arp1394
->hw_addr_len
= 16;
1382 arp1394
->sip
= *(u32
*)(arp_ptr
+ ETH1394_ALEN
);
1383 arp1394
->max_rec
= priv
->host
->csr
.max_rec
;
1384 arp1394
->sspd
= priv
->host
->csr
.lnk_spd
;
1385 arp1394
->fifo_hi
= htons (priv
->local_fifo
>> 32);
1386 arp1394
->fifo_lo
= htonl (priv
->local_fifo
& ~0x0);
1391 /* We need to encapsulate the standard header with our own. We use the
1392 * ethernet header's proto for our own. */
1393 static inline unsigned int ether1394_encapsulate_prep(unsigned int max_payload
,
1395 union eth1394_hdr
*hdr
,
1396 u16 dg_size
, u16 dgl
)
1398 unsigned int adj_max_payload
= max_payload
- hdr_type_len
[ETH1394_HDR_LF_UF
];
1400 /* Does it all fit in one packet? */
1401 if (dg_size
<= adj_max_payload
) {
1402 hdr
->uf
.lf
= ETH1394_HDR_LF_UF
;
1403 hdr
->uf
.ether_type
= proto
;
1405 hdr
->ff
.lf
= ETH1394_HDR_LF_FF
;
1406 hdr
->ff
.ether_type
= proto
;
1407 hdr
->ff
.dg_size
= dg_size
- 1;
1409 adj_max_payload
= max_payload
- hdr_type_len
[ETH1394_HDR_LF_FF
];
1411 return((dg_size
+ (adj_max_payload
- 1)) / adj_max_payload
);
1414 static inline unsigned int ether1394_encapsulate(struct sk_buff
*skb
,
1415 unsigned int max_payload
,
1416 union eth1394_hdr
*hdr
)
1418 union eth1394_hdr
*bufhdr
;
1419 int ftype
= hdr
->common
.lf
;
1420 int hdrsz
= hdr_type_len
[ftype
];
1421 unsigned int adj_max_payload
= max_payload
- hdrsz
;
1424 case ETH1394_HDR_LF_UF
:
1425 bufhdr
= (union eth1394_hdr
*)skb_push(skb
, hdrsz
);
1426 bufhdr
->words
.word1
= htons(hdr
->words
.word1
);
1427 bufhdr
->words
.word2
= hdr
->words
.word2
;
1430 case ETH1394_HDR_LF_FF
:
1431 bufhdr
= (union eth1394_hdr
*)skb_push(skb
, hdrsz
);
1432 bufhdr
->words
.word1
= htons(hdr
->words
.word1
);
1433 bufhdr
->words
.word2
= hdr
->words
.word2
;
1434 bufhdr
->words
.word3
= htons(hdr
->words
.word3
);
1435 bufhdr
->words
.word4
= 0;
1437 /* Set frag type here for future interior fragments */
1438 hdr
->common
.lf
= ETH1394_HDR_LF_IF
;
1443 hdr
->sf
.fg_off
+= adj_max_payload
;
1444 bufhdr
= (union eth1394_hdr
*)skb_pull(skb
, adj_max_payload
);
1445 if (max_payload
>= skb
->len
)
1446 hdr
->common
.lf
= ETH1394_HDR_LF_LF
;
1447 bufhdr
->words
.word1
= htons(hdr
->words
.word1
);
1448 bufhdr
->words
.word2
= htons(hdr
->words
.word2
);
1449 bufhdr
->words
.word3
= htons(hdr
->words
.word3
);
1450 bufhdr
->words
.word4
= 0;
1453 return min(max_payload
, skb
->len
);
1456 static inline struct hpsb_packet
*ether1394_alloc_common_packet(struct hpsb_host
*host
)
1458 struct hpsb_packet
*p
;
1460 p
= hpsb_alloc_packet(0);
1463 p
->generation
= get_hpsb_generation(host
);
1464 p
->type
= hpsb_async
;
1469 static inline int ether1394_prep_write_packet(struct hpsb_packet
*p
,
1470 struct hpsb_host
*host
,
1471 nodeid_t node
, u64 addr
,
1472 void * data
, int tx_len
)
1477 p
->tcode
= TCODE_WRITEB
;
1478 p
->header
[1] = (host
->node_id
<< 16) | (addr
>> 32);
1479 p
->header
[2] = addr
& 0xffffffff;
1481 p
->header_size
= 16;
1482 p
->expect_response
= 1;
1484 if (hpsb_get_tlabel(p
)) {
1485 ETH1394_PRINT_G(KERN_ERR
, "No more tlabels left while sending "
1486 "to node " NODE_BUS_FMT
"\n", NODE_BUS_ARGS(host
, node
));
1489 p
->header
[0] = (p
->node_id
<< 16) | (p
->tlabel
<< 10)
1490 | (1 << 8) | (TCODE_WRITEB
<< 4);
1492 p
->header
[3] = tx_len
<< 16;
1493 p
->data_size
= (tx_len
+ 3) & ~3;
1494 p
->data
= (quadlet_t
*)data
;
1499 static inline void ether1394_prep_gasp_packet(struct hpsb_packet
*p
,
1500 struct eth1394_priv
*priv
,
1501 struct sk_buff
*skb
, int length
)
1504 p
->tcode
= TCODE_STREAM_DATA
;
1506 p
->header
[0] = (length
<< 16) | (3 << 14)
1507 | ((priv
->broadcast_channel
) << 8)
1508 | (TCODE_STREAM_DATA
<< 4);
1509 p
->data_size
= length
;
1510 p
->data
= ((quadlet_t
*)skb
->data
) - 2;
1511 p
->data
[0] = cpu_to_be32((priv
->host
->node_id
<< 16) |
1512 ETHER1394_GASP_SPECIFIER_ID_HI
);
1513 p
->data
[1] = cpu_to_be32((ETHER1394_GASP_SPECIFIER_ID_LO
<< 24) |
1514 ETHER1394_GASP_VERSION
);
1516 /* Setting the node id to ALL_NODES (not LOCAL_BUS | ALL_NODES)
1517 * prevents hpsb_send_packet() from setting the speed to an arbitrary
1518 * value based on packet->node_id if packet->node_id is not set. */
1519 p
->node_id
= ALL_NODES
;
1520 p
->speed_code
= priv
->bc_sspd
;
1523 static inline void ether1394_free_packet(struct hpsb_packet
*packet
)
1525 if (packet
->tcode
!= TCODE_STREAM_DATA
)
1526 hpsb_free_tlabel(packet
);
1527 hpsb_free_packet(packet
);
1530 static void ether1394_complete_cb(void *__ptask
);
1532 static int ether1394_send_packet(struct packet_task
*ptask
, unsigned int tx_len
)
1534 struct eth1394_priv
*priv
= ptask
->priv
;
1535 struct hpsb_packet
*packet
= NULL
;
1537 packet
= ether1394_alloc_common_packet(priv
->host
);
1541 if (ptask
->tx_type
== ETH1394_GASP
) {
1542 int length
= tx_len
+ (2 * sizeof(quadlet_t
));
1544 ether1394_prep_gasp_packet(packet
, priv
, ptask
->skb
, length
);
1545 } else if (ether1394_prep_write_packet(packet
, priv
->host
,
1547 ptask
->addr
, ptask
->skb
->data
,
1549 hpsb_free_packet(packet
);
1553 ptask
->packet
= packet
;
1554 hpsb_set_packet_complete_task(ptask
->packet
, ether1394_complete_cb
,
1557 if (hpsb_send_packet(packet
) < 0) {
1558 ether1394_free_packet(packet
);
1566 /* Task function to be run when a datagram transmission is completed */
1567 static inline void ether1394_dg_complete(struct packet_task
*ptask
, int fail
)
1569 struct sk_buff
*skb
= ptask
->skb
;
1570 struct net_device
*dev
= skb
->dev
;
1571 struct eth1394_priv
*priv
= netdev_priv(dev
);
1572 unsigned long flags
;
1575 spin_lock_irqsave(&priv
->lock
, flags
);
1577 priv
->stats
.tx_dropped
++;
1578 priv
->stats
.tx_errors
++;
1580 priv
->stats
.tx_bytes
+= skb
->len
;
1581 priv
->stats
.tx_packets
++;
1583 spin_unlock_irqrestore(&priv
->lock
, flags
);
1585 dev_kfree_skb_any(skb
);
1586 kmem_cache_free(packet_task_cache
, ptask
);
1590 /* Callback for when a packet has been sent and the status of that packet is
1592 static void ether1394_complete_cb(void *__ptask
)
1594 struct packet_task
*ptask
= (struct packet_task
*)__ptask
;
1595 struct hpsb_packet
*packet
= ptask
->packet
;
1598 if (packet
->tcode
!= TCODE_STREAM_DATA
)
1599 fail
= hpsb_packet_success(packet
);
1601 ether1394_free_packet(packet
);
1603 ptask
->outstanding_pkts
--;
1604 if (ptask
->outstanding_pkts
> 0 && !fail
) {
1607 /* Add the encapsulation header to the fragment */
1608 tx_len
= ether1394_encapsulate(ptask
->skb
, ptask
->max_payload
,
1610 if (ether1394_send_packet(ptask
, tx_len
))
1611 ether1394_dg_complete(ptask
, 1);
1613 ether1394_dg_complete(ptask
, fail
);
1619 /* Transmit a packet (called by kernel) */
1620 static int ether1394_tx (struct sk_buff
*skb
, struct net_device
*dev
)
1622 gfp_t kmflags
= in_interrupt() ? GFP_ATOMIC
: GFP_KERNEL
;
1623 struct eth1394hdr
*eth
;
1624 struct eth1394_priv
*priv
= netdev_priv(dev
);
1626 unsigned long flags
;
1628 eth1394_tx_type tx_type
;
1630 unsigned int tx_len
;
1631 unsigned int max_payload
;
1634 struct packet_task
*ptask
;
1635 struct eth1394_node_ref
*node
;
1636 struct eth1394_node_info
*node_info
= NULL
;
1638 ptask
= kmem_cache_alloc(packet_task_cache
, kmflags
);
1639 if (ptask
== NULL
) {
1644 /* XXX Ignore this for now. Noticed that when MacOSX is the IRM,
1645 * it does not set our validity bit. We need to compensate for
1646 * that somewhere else, but not in eth1394. */
1648 if ((priv
->host
->csr
.broadcast_channel
& 0xc0000000) != 0xc0000000) {
1654 if ((skb
= skb_share_check (skb
, kmflags
)) == NULL
) {
1659 /* Get rid of the fake eth1394 header, but save a pointer */
1660 eth
= (struct eth1394hdr
*)skb
->data
;
1661 skb_pull(skb
, ETH1394_HLEN
);
1663 proto
= eth
->h_proto
;
1666 /* Set the transmission type for the packet. ARP packets and IP
1667 * broadcast packets are sent via GASP. */
1668 if (memcmp(eth
->h_dest
, dev
->broadcast
, ETH1394_ALEN
) == 0 ||
1669 proto
== htons(ETH_P_ARP
) ||
1670 (proto
== htons(ETH_P_IP
) &&
1671 IN_MULTICAST(ntohl(skb
->nh
.iph
->daddr
)))) {
1672 tx_type
= ETH1394_GASP
;
1673 dest_node
= LOCAL_BUS
| ALL_NODES
;
1674 max_payload
= priv
->bc_maxpayload
- ETHER1394_GASP_OVERHEAD
;
1675 BUG_ON(max_payload
< (512 - ETHER1394_GASP_OVERHEAD
));
1677 if (max_payload
< dg_size
+ hdr_type_len
[ETH1394_HDR_LF_UF
])
1680 __be64 guid
= get_unaligned((u64
*)eth
->h_dest
);
1682 node
= eth1394_find_node_guid(&priv
->ip_node_list
,
1688 node_info
= (struct eth1394_node_info
*)node
->ud
->device
.driver_data
;
1689 if (node_info
->fifo
== CSR1212_INVALID_ADDR_SPACE
) {
1694 dest_node
= node
->ud
->ne
->nodeid
;
1695 max_payload
= node_info
->maxpayload
;
1696 BUG_ON(max_payload
< (512 - ETHER1394_GASP_OVERHEAD
));
1698 dgl
= node_info
->dgl
;
1699 if (max_payload
< dg_size
+ hdr_type_len
[ETH1394_HDR_LF_UF
])
1701 tx_type
= ETH1394_WRREQ
;
1704 /* If this is an ARP packet, convert it */
1705 if (proto
== htons(ETH_P_ARP
))
1706 ether1394_arp_to_1394arp (skb
, dev
);
1708 ptask
->hdr
.words
.word1
= 0;
1709 ptask
->hdr
.words
.word2
= 0;
1710 ptask
->hdr
.words
.word3
= 0;
1711 ptask
->hdr
.words
.word4
= 0;
1714 ptask
->tx_type
= tx_type
;
1716 if (tx_type
!= ETH1394_GASP
) {
1719 spin_lock_irqsave(&priv
->lock
, flags
);
1720 addr
= node_info
->fifo
;
1721 spin_unlock_irqrestore(&priv
->lock
, flags
);
1724 ptask
->dest_node
= dest_node
;
1727 ptask
->tx_type
= tx_type
;
1728 ptask
->max_payload
= max_payload
;
1729 ptask
->outstanding_pkts
= ether1394_encapsulate_prep(max_payload
, proto
,
1730 &ptask
->hdr
, dg_size
,
1733 /* Add the encapsulation header to the fragment */
1734 tx_len
= ether1394_encapsulate(skb
, max_payload
, &ptask
->hdr
);
1735 dev
->trans_start
= jiffies
;
1736 if (ether1394_send_packet(ptask
, tx_len
))
1739 netif_wake_queue(dev
);
1743 kmem_cache_free(packet_task_cache
, ptask
);
1748 spin_lock_irqsave (&priv
->lock
, flags
);
1749 priv
->stats
.tx_dropped
++;
1750 priv
->stats
.tx_errors
++;
1751 spin_unlock_irqrestore (&priv
->lock
, flags
);
1753 if (netif_queue_stopped(dev
))
1754 netif_wake_queue(dev
);
1756 return 0; /* returning non-zero causes serious problems */
1759 static void ether1394_get_drvinfo(struct net_device
*dev
, struct ethtool_drvinfo
*info
)
1761 strcpy (info
->driver
, driver_name
);
1762 /* FIXME XXX provide sane businfo */
1763 strcpy (info
->bus_info
, "ieee1394");
1766 static struct ethtool_ops ethtool_ops
= {
1767 .get_drvinfo
= ether1394_get_drvinfo
1770 static int __init
ether1394_init_module (void)
1772 packet_task_cache
= kmem_cache_create("packet_task", sizeof(struct packet_task
),
1775 /* Register ourselves as a highlevel driver */
1776 hpsb_register_highlevel(ð1394_highlevel
);
1778 return hpsb_register_protocol(ð1394_proto_driver
);
1781 static void __exit
ether1394_exit_module (void)
1783 hpsb_unregister_protocol(ð1394_proto_driver
);
1784 hpsb_unregister_highlevel(ð1394_highlevel
);
1785 kmem_cache_destroy(packet_task_cache
);
1788 module_init(ether1394_init_module
);
1789 module_exit(ether1394_exit_module
);