blob: f5c586c2bba658cdfbef07d7e268431c0f64bfdb [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Stefan Richterefbeccf2007-04-02 02:12:32 +02002 * eth1394.c -- IPv4 driver for Linux IEEE-1394 Subsystem
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
4 * Copyright (C) 2001-2003 Ben Collins <bcollins@debian.org>
5 * 2000 Bonin Franck <boninf@free.fr>
6 * 2003 Steve Kinneberg <kinnebergsteve@acmsystems.com>
7 *
8 * Mainly based on work by Emanuel Pirker and Andreas E. Bombe
9 *
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.
14 *
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.
19 *
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.
23 */
24
Stefan Richterefbeccf2007-04-02 02:12:32 +020025/*
26 * This driver intends to support RFC 2734, which describes a method for
27 * transporting IPv4 datagrams over IEEE-1394 serial busses.
Linus Torvalds1da177e2005-04-16 15:20:36 -070028 *
29 * TODO:
30 * RFC 2734 related:
31 * - Add MCAP. Limited Multicast exists only to 224.0.0.1 and 224.0.0.2.
32 *
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
40 */
41
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include <linux/module.h>
43
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#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>
Stefan Richter7a97bc02007-05-05 17:25:51 +020050#include <linux/workqueue.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
52#include <linux/netdevice.h>
53#include <linux/inetdevice.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#include <linux/if_arp.h>
55#include <linux/if_ether.h>
56#include <linux/ip.h>
57#include <linux/in.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>
David S. Millerc20e3942006-10-29 16:14:55 -080064#include <asm/unaligned.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070065#include <net/arp.h>
66
Stefan Richterde4394f2006-07-03 12:02:29 -040067#include "config_roms.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070068#include "csr1212.h"
Stefan Richterde4394f2006-07-03 12:02:29 -040069#include "eth1394.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070070#include "highlevel.h"
Stefan Richterde4394f2006-07-03 12:02:29 -040071#include "ieee1394.h"
72#include "ieee1394_core.h"
73#include "ieee1394_hotplug.h"
74#include "ieee1394_transactions.h"
75#include "ieee1394_types.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070076#include "iso.h"
77#include "nodemgr.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79#define ETH1394_PRINT_G(level, fmt, args...) \
80 printk(level "%s: " fmt, driver_name, ## args)
81
82#define ETH1394_PRINT(level, dev_name, fmt, args...) \
83 printk(level "%s: %s: " fmt, driver_name, dev_name, ## args)
84
Linus Torvalds1da177e2005-04-16 15:20:36 -070085struct fragment_info {
86 struct list_head list;
87 int offset;
88 int len;
89};
90
91struct partial_datagram {
92 struct list_head list;
93 u16 dgl;
94 u16 dg_size;
Harvey Harrisonfaf26bc2008-12-13 15:03:06 -080095 __be16 ether_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 struct sk_buff *skb;
97 char *pbuf;
98 struct list_head frag_info;
99};
100
101struct pdg_list {
Stefan Richterefbeccf2007-04-02 02:12:32 +0200102 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105};
106
107struct eth1394_host_info {
108 struct hpsb_host *host;
109 struct net_device *dev;
110};
111
112struct eth1394_node_ref {
113 struct unit_directory *ud;
114 struct list_head list;
115};
116
117struct eth1394_node_info {
Stefan Richterefbeccf2007-04-02 02:12:32 +0200118 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123};
124
Stefan Richterefbeccf2007-04-02 02:12:32 +0200125static const char driver_name[] = "eth1394";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
Christoph Lametere18b8902006-12-06 20:33:20 -0800127static struct kmem_cache *packet_task_cache;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128
129static struct hpsb_highlevel eth1394_highlevel;
130
131/* Use common.lf to determine header len */
132static const int hdr_type_len[] = {
Stefan Richterefbeccf2007-04-02 02:12:32 +0200133 sizeof(struct eth1394_uf_hdr),
134 sizeof(struct eth1394_ff_hdr),
135 sizeof(struct eth1394_sf_hdr),
136 sizeof(struct eth1394_sf_hdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137};
138
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139static const u16 eth1394_speedto_maxpayload[] = {
140/* S100, S200, S400, S800, S1600, S3200 */
141 512, 1024, 2048, 4096, 4096, 4096
142};
143
144MODULE_AUTHOR("Ben Collins (bcollins@debian.org)");
145MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)");
146MODULE_LICENSE("GPL");
147
Stefan Richterefbeccf2007-04-02 02:12:32 +0200148/*
149 * The max_partial_datagrams parameter is the maximum number of fragmented
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 * datagrams per node that eth1394 will keep in memory. Providing an upper
151 * bound allows us to limit the amount of memory that partial datagrams
152 * consume in the event that some partial datagrams are never completed.
153 */
154static int max_partial_datagrams = 25;
155module_param(max_partial_datagrams, int, S_IRUGO | S_IWUSR);
156MODULE_PARM_DESC(max_partial_datagrams,
157 "Maximum number of partially received fragmented datagrams "
158 "(default = 25).");
159
160
161static int ether1394_header(struct sk_buff *skb, struct net_device *dev,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700162 unsigned short type, const void *daddr,
163 const void *saddr, unsigned len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164static int ether1394_rebuild_header(struct sk_buff *skb);
Stephen Hemmingerb95cce32007-09-26 22:13:38 -0700165static int ether1394_header_parse(const struct sk_buff *skb,
166 unsigned char *haddr);
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700167static int ether1394_header_cache(const struct neighbour *neigh,
168 struct hh_cache *hh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169static void ether1394_header_cache_update(struct hh_cache *hh,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700170 const struct net_device *dev,
171 const unsigned char *haddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172static int ether1394_tx(struct sk_buff *skb, struct net_device *dev);
173static void ether1394_iso(struct hpsb_iso *iso);
174
175static struct ethtool_ops ethtool_ops;
176
177static int ether1394_write(struct hpsb_host *host, int srcid, int destid,
178 quadlet_t *data, u64 addr, size_t len, u16 flags);
Stefan Richterefbeccf2007-04-02 02:12:32 +0200179static void ether1394_add_host(struct hpsb_host *host);
180static void ether1394_remove_host(struct hpsb_host *host);
181static void ether1394_host_reset(struct hpsb_host *host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182
183/* Function for incoming 1394 packets */
Tobias Klauser1c4fb572009-02-09 22:05:06 +0100184static const struct hpsb_address_ops addr_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 .write = ether1394_write,
186};
187
188/* Ieee1394 highlevel driver functions */
189static struct hpsb_highlevel eth1394_highlevel = {
190 .name = driver_name,
191 .add_host = ether1394_add_host,
192 .remove_host = ether1394_remove_host,
193 .host_reset = ether1394_host_reset,
194};
195
Stefan Richter5009d262007-04-02 02:15:53 +0200196static int ether1394_recv_init(struct eth1394_priv *priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197{
Stefan Richterefbeccf2007-04-02 02:12:32 +0200198 unsigned int iso_buf_size;
199
200 /* FIXME: rawiso limits us to PAGE_SIZE */
201 iso_buf_size = min((unsigned int)PAGE_SIZE,
202 2 * (1U << (priv->host->csr.max_rec + 1)));
Jean Delvare09d7a962007-04-01 10:06:33 +0200203
204 priv->iso = hpsb_iso_recv_init(priv->host,
Stefan Richterefbeccf2007-04-02 02:12:32 +0200205 ETHER1394_GASP_BUFFERS * iso_buf_size,
Jean Delvare09d7a962007-04-01 10:06:33 +0200206 ETHER1394_GASP_BUFFERS,
207 priv->broadcast_channel,
208 HPSB_ISO_DMA_PACKET_PER_BUFFER,
209 1, ether1394_iso);
210 if (priv->iso == NULL) {
Stefan Richter5009d262007-04-02 02:15:53 +0200211 ETH1394_PRINT_G(KERN_ERR, "Failed to allocate IR context\n");
Jean Delvare09d7a962007-04-01 10:06:33 +0200212 priv->bc_state = ETHER1394_BC_ERROR;
213 return -EAGAIN;
214 }
215
216 if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0)
217 priv->bc_state = ETHER1394_BC_STOPPED;
218 else
219 priv->bc_state = ETHER1394_BC_RUNNING;
220 return 0;
221}
222
223/* This is called after an "ifup" */
224static int ether1394_open(struct net_device *dev)
225{
226 struct eth1394_priv *priv = netdev_priv(dev);
227 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 if (priv->bc_state == ETHER1394_BC_ERROR) {
Stefan Richter5009d262007-04-02 02:15:53 +0200230 ret = ether1394_recv_init(priv);
Jean Delvare09d7a962007-04-01 10:06:33 +0200231 if (ret)
232 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 }
Stefan Richterefbeccf2007-04-02 02:12:32 +0200234 netif_start_queue(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 return 0;
236}
237
238/* This is called after an "ifdown" */
Stefan Richterefbeccf2007-04-02 02:12:32 +0200239static int ether1394_stop(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240{
Stefan Richter7a97bc02007-05-05 17:25:51 +0200241 /* flush priv->wake */
242 flush_scheduled_work();
243
Stefan Richterefbeccf2007-04-02 02:12:32 +0200244 netif_stop_queue(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 return 0;
246}
247
Stefan Richterefbeccf2007-04-02 02:12:32 +0200248/* 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? */
250static void ether1394_tx_timeout(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251{
Stefan Richterefbeccf2007-04-02 02:12:32 +0200252 struct hpsb_host *host =
253 ((struct eth1394_priv *)netdev_priv(dev))->host;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
Stefan Richter246a5fd2007-04-02 02:16:40 +0200255 ETH1394_PRINT(KERN_ERR, dev->name, "Timeout, resetting host\n");
256 ether1394_host_reset(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257}
258
Stefan Richter17bab402007-04-03 23:55:40 +0200259static inline int ether1394_max_mtu(struct hpsb_host* host)
260{
261 return (1 << (host->csr.max_rec + 1))
262 - sizeof(union eth1394_hdr) - ETHER1394_GASP_OVERHEAD;
263}
264
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265static int ether1394_change_mtu(struct net_device *dev, int new_mtu)
266{
Stefan Richter17bab402007-04-03 23:55:40 +0200267 int max_mtu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
Stefan Richter17bab402007-04-03 23:55:40 +0200269 if (new_mtu < 68)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 return -EINVAL;
Stefan Richterefbeccf2007-04-02 02:12:32 +0200271
Stefan Richter17bab402007-04-03 23:55:40 +0200272 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);
277 return -ERANGE;
278 }
279
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 dev->mtu = new_mtu;
281 return 0;
282}
283
284static void purge_partial_datagram(struct list_head *old)
285{
Stefan Richterefbeccf2007-04-02 02:12:32 +0200286 struct partial_datagram *pd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 struct list_head *lh, *n;
Stefan Richterefbeccf2007-04-02 02:12:32 +0200288 struct fragment_info *fi;
289
290 pd = list_entry(old, struct partial_datagram, list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291
292 list_for_each_safe(lh, n, &pd->frag_info) {
Stefan Richterefbeccf2007-04-02 02:12:32 +0200293 fi = list_entry(lh, struct fragment_info, list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 list_del(lh);
295 kfree(fi);
296 }
297 list_del(old);
298 kfree_skb(pd->skb);
299 kfree(pd);
300}
301
302/******************************************
303 * 1394 bus activity functions
304 ******************************************/
305
306static struct eth1394_node_ref *eth1394_find_node(struct list_head *inl,
307 struct unit_directory *ud)
308{
309 struct eth1394_node_ref *node;
310
311 list_for_each_entry(node, inl, list)
312 if (node->ud == ud)
313 return node;
314
315 return NULL;
316}
317
318static struct eth1394_node_ref *eth1394_find_node_guid(struct list_head *inl,
319 u64 guid)
320{
321 struct eth1394_node_ref *node;
322
323 list_for_each_entry(node, inl, list)
324 if (node->ud->ne->guid == guid)
325 return node;
326
327 return NULL;
328}
329
330static struct eth1394_node_ref *eth1394_find_node_nodeid(struct list_head *inl,
331 nodeid_t nodeid)
332{
333 struct eth1394_node_ref *node;
Stefan Richterefbeccf2007-04-02 02:12:32 +0200334
335 list_for_each_entry(node, inl, list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 if (node->ud->ne->nodeid == nodeid)
337 return node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
339 return NULL;
340}
341
Stefan Richterd06c1dd2007-04-02 02:14:45 +0200342static int eth1394_new_node(struct eth1394_host_info *hi,
343 struct unit_directory *ud)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 struct eth1394_priv *priv;
346 struct eth1394_node_ref *new_node;
347 struct eth1394_node_info *node_info;
348
Stefan Richter5e7abcc2007-04-02 02:13:51 +0200349 new_node = kmalloc(sizeof(*new_node), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 if (!new_node)
351 return -ENOMEM;
352
Stefan Richter5e7abcc2007-04-02 02:13:51 +0200353 node_info = kmalloc(sizeof(*node_info), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 if (!node_info) {
355 kfree(new_node);
356 return -ENOMEM;
357 }
358
359 spin_lock_init(&node_info->pdg.lock);
360 INIT_LIST_HEAD(&node_info->pdg.list);
361 node_info->pdg.sz = 0;
Ben Collins67372312006-06-12 18:15:31 -0400362 node_info->fifo = CSR1212_INVALID_ADDR_SPACE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363
Greg Kroah-Hartmanbab03052009-04-30 14:43:31 -0700364 dev_set_drvdata(&ud->device, node_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 new_node->ud = ud;
366
367 priv = netdev_priv(hi->dev);
368 list_add_tail(&new_node->list, &priv->ip_node_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 return 0;
370}
371
Stefan Richterd06c1dd2007-04-02 02:14:45 +0200372static int eth1394_probe(struct device *dev)
373{
374 struct unit_directory *ud;
375 struct eth1394_host_info *hi;
376
377 ud = container_of(dev, struct unit_directory, device);
378 hi = hpsb_get_hostinfo(&eth1394_highlevel, ud->ne->host);
379 if (!hi)
380 return -ENOENT;
381
382 return eth1394_new_node(hi, ud);
383}
384
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385static int eth1394_remove(struct device *dev)
386{
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;
393 unsigned long flags;
394
395 ud = container_of(dev, struct unit_directory, device);
396 hi = hpsb_get_hostinfo(&eth1394_highlevel, ud->ne->host);
397 if (!hi)
398 return -ENOENT;
399
400 priv = netdev_priv(hi->dev);
401
402 old_node = eth1394_find_node(&priv->ip_node_list, ud);
Stefan Richterefbeccf2007-04-02 02:12:32 +0200403 if (!old_node)
404 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405
Stefan Richterefbeccf2007-04-02 02:12:32 +0200406 list_del(&old_node->list);
407 kfree(old_node);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408
Greg Kroah-Hartmanbab03052009-04-30 14:43:31 -0700409 node_info = dev_get_drvdata(&ud->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410
Stefan Richterefbeccf2007-04-02 02:12:32 +0200411 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
Stefan Richterefbeccf2007-04-02 02:12:32 +0200418 kfree(node_info);
Greg Kroah-Hartmanbab03052009-04-30 14:43:31 -0700419 dev_set_drvdata(&ud->device, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 return 0;
421}
422
423static int eth1394_update(struct unit_directory *ud)
424{
425 struct eth1394_host_info *hi;
426 struct eth1394_priv *priv;
427 struct eth1394_node_ref *node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
429 hi = hpsb_get_hostinfo(&eth1394_highlevel, ud->ne->host);
430 if (!hi)
431 return -ENOENT;
432
433 priv = netdev_priv(hi->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 node = eth1394_find_node(&priv->ip_node_list, ud);
Stefan Richterefbeccf2007-04-02 02:12:32 +0200435 if (node)
436 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437
Stefan Richterd06c1dd2007-04-02 02:14:45 +0200438 return eth1394_new_node(hi, ud);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439}
440
Stefan Richterc6409462009-02-15 23:11:38 +0100441static const struct ieee1394_device_id eth1394_id_table[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 {
443 .match_flags = (IEEE1394_MATCH_SPECIFIER_ID |
444 IEEE1394_MATCH_VERSION),
445 .specifier_id = ETHER1394_GASP_SPECIFIER_ID,
446 .version = ETHER1394_GASP_VERSION,
447 },
448 {}
449};
450
451MODULE_DEVICE_TABLE(ieee1394, eth1394_id_table);
452
453static struct hpsb_protocol_driver eth1394_proto_driver = {
Stefan Richterefbeccf2007-04-02 02:12:32 +0200454 .name = driver_name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 .id_table = eth1394_id_table,
456 .update = eth1394_update,
457 .driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 .probe = eth1394_probe,
459 .remove = eth1394_remove,
460 },
461};
462
Stefan Richterefbeccf2007-04-02 02:12:32 +0200463static void ether1394_reset_priv(struct net_device *dev, int set_mtu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464{
465 unsigned long flags;
466 int i;
467 struct eth1394_priv *priv = netdev_priv(dev);
468 struct hpsb_host *host = priv->host;
Stefan Richterefbeccf2007-04-02 02:12:32 +0200469 u64 guid = get_unaligned((u64 *)&(host->csr.rom->bus_info_data[3]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 int max_speed = IEEE1394_SPEED_MAX;
471
Stefan Richterefbeccf2007-04-02 02:12:32 +0200472 spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
Stefan Richter027611b2007-04-02 02:15:21 +0200474 memset(priv->ud_list, 0, sizeof(priv->ud_list));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 priv->bc_maxpayload = 512;
476
477 /* Determine speed limit */
Stefan Richter21b2c562007-04-23 21:28:47 +0200478 /* 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;
485 break;
486 }
Ben Collins647dcb52006-06-12 18:12:37 -0400487 if (max_speed > host->speed[i])
488 max_speed = host->speed[i];
Stefan Richter21b2c562007-04-23 21:28:47 +0200489 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 priv->bc_sspd = max_speed;
491
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 if (set_mtu) {
Stefan Richter17bab402007-04-03 23:55:40 +0200493 /* Use the RFC 2734 default 1500 octets or the maximum payload
494 * as initial MTU */
495 dev->mtu = min(1500, ether1394_max_mtu(host));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496
497 /* Set our hardware address while we're at it */
David S. Millerc20e3942006-10-29 16:14:55 -0800498 memcpy(dev->dev_addr, &guid, sizeof(u64));
499 memset(dev->broadcast, 0xff, sizeof(u64));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 }
501
Stefan Richterefbeccf2007-04-02 02:12:32 +0200502 spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503}
504
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700505static const struct header_ops ether1394_header_ops = {
506 .create = ether1394_header,
507 .rebuild = ether1394_rebuild_header,
508 .cache = ether1394_header_cache,
509 .cache_update = ether1394_header_cache_update,
510 .parse = ether1394_header_parse,
511};
512
Stephen Hemminger79994c92009-01-06 12:54:56 +0000513static const struct net_device_ops ether1394_netdev_ops = {
514 .ndo_open = ether1394_open,
515 .ndo_stop = ether1394_stop,
516 .ndo_start_xmit = ether1394_tx,
Stephen Hemminger79994c92009-01-06 12:54:56 +0000517 .ndo_tx_timeout = ether1394_tx_timeout,
518 .ndo_change_mtu = ether1394_change_mtu,
519};
520
Stefan Richterefbeccf2007-04-02 02:12:32 +0200521static void ether1394_init_dev(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700524 dev->header_ops = &ether1394_header_ops;
Stephen Hemminger79994c92009-01-06 12:54:56 +0000525 dev->netdev_ops = &ether1394_netdev_ops;
Stefan Richter01590d22007-04-02 02:20:37 +0200526
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 SET_ETHTOOL_OPS(dev, &ethtool_ops);
528
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 dev->watchdog_timeo = ETHER1394_TIMEOUT;
530 dev->flags = IFF_BROADCAST | IFF_MULTICAST;
531 dev->features = NETIF_F_HIGHDMA;
532 dev->addr_len = ETH1394_ALEN;
533 dev->hard_header_len = ETH1394_HLEN;
534 dev->type = ARPHRD_IEEE1394;
535
Stefan Richter01590d22007-04-02 02:20:37 +0200536 /* FIXME: This value was copied from ether_setup(). Is it too much? */
537 dev->tx_queue_len = 1000;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538}
539
540/*
Stefan Richter7a97bc02007-05-05 17:25:51 +0200541 * Wake the queue up after commonly encountered transmit failure conditions are
542 * hopefully over. Currently only tlabel exhaustion is accounted for.
543 */
544static void ether1394_wake_queue(struct work_struct *work)
545{
546 struct eth1394_priv *priv;
547 struct hpsb_packet *packet;
548
549 priv = container_of(work, struct eth1394_priv, wake);
550 packet = hpsb_alloc_packet(0);
551
552 /* This is really bad, but unjam the queue anyway. */
553 if (!packet)
554 goto out;
555
556 packet->host = priv->host;
557 packet->node_id = priv->wake_node;
558 /*
559 * A transaction label is all we really want. If we get one, it almost
560 * always means we can get a lot more because the ieee1394 core recycled
561 * a whole batch of tlabels, at last.
562 */
563 if (hpsb_get_tlabel(packet) == 0)
564 hpsb_free_tlabel(packet);
565
566 hpsb_free_packet(packet);
567out:
568 netif_wake_queue(priv->wake_dev);
569}
570
571/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 * This function is called every time a card is found. It is generally called
573 * when the module is installed. This is where we add all of our ethernet
574 * devices. One for each host.
575 */
Stefan Richterefbeccf2007-04-02 02:12:32 +0200576static void ether1394_add_host(struct hpsb_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577{
578 struct eth1394_host_info *hi = NULL;
579 struct net_device *dev = NULL;
580 struct eth1394_priv *priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 u64 fifo_addr;
582
Stefan Richter70093cf2007-03-27 01:36:50 +0200583 if (hpsb_config_rom_ip1394_add(host) != 0) {
584 ETH1394_PRINT_G(KERN_ERR, "Can't add IP-over-1394 ROM entry\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 return;
Stefan Richter70093cf2007-03-27 01:36:50 +0200586 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587
Ben Collins67372312006-06-12 18:15:31 -0400588 fifo_addr = hpsb_allocate_and_register_addrspace(
589 &eth1394_highlevel, host, &addr_ops,
590 ETHER1394_REGION_ADDR_LEN, ETHER1394_REGION_ADDR_LEN,
591 CSR1212_INVALID_ADDR_SPACE, CSR1212_INVALID_ADDR_SPACE);
Stefan Richter157188c2007-02-10 23:56:38 +0100592 if (fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
593 ETH1394_PRINT_G(KERN_ERR, "Cannot register CSR space\n");
Stefan Richter70093cf2007-03-27 01:36:50 +0200594 hpsb_config_rom_ip1394_remove(host);
Stefan Richter157188c2007-02-10 23:56:38 +0100595 return;
596 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597
Stefan Richter01590d22007-04-02 02:20:37 +0200598 dev = alloc_netdev(sizeof(*priv), "eth%d", ether1394_init_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 if (dev == NULL) {
Stefan Richter5009d262007-04-02 02:15:53 +0200600 ETH1394_PRINT_G(KERN_ERR, "Out of memory\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 goto out;
Stefan Richterefbeccf2007-04-02 02:12:32 +0200602 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603
Stefan Richter8e4dc402007-05-27 23:14:05 +0200604 SET_NETDEV_DEV(dev, &host->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605
606 priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 INIT_LIST_HEAD(&priv->ip_node_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 spin_lock_init(&priv->lock);
609 priv->host = host;
610 priv->local_fifo = fifo_addr;
Stefan Richter7a97bc02007-05-05 17:25:51 +0200611 INIT_WORK(&priv->wake, ether1394_wake_queue);
612 priv->wake_dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613
614 hi = hpsb_create_hostinfo(&eth1394_highlevel, host, sizeof(*hi));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 if (hi == NULL) {
Stefan Richter5009d262007-04-02 02:15:53 +0200616 ETH1394_PRINT_G(KERN_ERR, "Out of memory\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 goto out;
Stefan Richterefbeccf2007-04-02 02:12:32 +0200618 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619
Stefan Richter01590d22007-04-02 02:20:37 +0200620 ether1394_reset_priv(dev, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621
Stefan Richter5009d262007-04-02 02:15:53 +0200622 if (register_netdev(dev)) {
623 ETH1394_PRINT_G(KERN_ERR, "Cannot register the driver\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 goto out;
625 }
626
Stefan Richter5009d262007-04-02 02:15:53 +0200627 ETH1394_PRINT(KERN_INFO, dev->name, "IPv4 over IEEE 1394 (fw-host%d)\n",
628 host->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629
630 hi->host = host;
631 hi->dev = dev;
632
633 /* Ignore validity in hopes that it will be set in the future. It'll
634 * be checked when the eth device is opened. */
635 priv->broadcast_channel = host->csr.broadcast_channel & 0x3f;
636
Stefan Richter5009d262007-04-02 02:15:53 +0200637 ether1394_recv_init(priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639out:
Stefan Richter157188c2007-02-10 23:56:38 +0100640 if (dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 free_netdev(dev);
642 if (hi)
643 hpsb_destroy_hostinfo(&eth1394_highlevel, host);
Stefan Richter157188c2007-02-10 23:56:38 +0100644 hpsb_unregister_addrspace(&eth1394_highlevel, host, fifo_addr);
Stefan Richter70093cf2007-03-27 01:36:50 +0200645 hpsb_config_rom_ip1394_remove(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646}
647
648/* Remove a card from our list */
Stefan Richterefbeccf2007-04-02 02:12:32 +0200649static void ether1394_remove_host(struct hpsb_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650{
651 struct eth1394_host_info *hi;
Stefan Richter2cd556a2007-02-10 23:57:57 +0100652 struct eth1394_priv *priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653
654 hi = hpsb_get_hostinfo(&eth1394_highlevel, host);
Stefan Richter2cd556a2007-02-10 23:57:57 +0100655 if (!hi)
656 return;
657 priv = netdev_priv(hi->dev);
658 hpsb_unregister_addrspace(&eth1394_highlevel, host, priv->local_fifo);
Stefan Richter70093cf2007-03-27 01:36:50 +0200659 hpsb_config_rom_ip1394_remove(host);
Stefan Richter2cd556a2007-02-10 23:57:57 +0100660 if (priv->iso)
661 hpsb_iso_shutdown(priv->iso);
662 unregister_netdev(hi->dev);
663 free_netdev(hi->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664}
665
Stefan Richterefbeccf2007-04-02 02:12:32 +0200666/* A bus reset happened */
667static void ether1394_host_reset(struct hpsb_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668{
669 struct eth1394_host_info *hi;
670 struct eth1394_priv *priv;
671 struct net_device *dev;
672 struct list_head *lh, *n;
673 struct eth1394_node_ref *node;
674 struct eth1394_node_info *node_info;
675 unsigned long flags;
676
677 hi = hpsb_get_hostinfo(&eth1394_highlevel, host);
678
679 /* This can happen for hosts that we don't use */
Stefan Richter2cd556a2007-02-10 23:57:57 +0100680 if (!hi)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 return;
682
683 dev = hi->dev;
Stefan Richterefbeccf2007-04-02 02:12:32 +0200684 priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685
Stefan Richterefbeccf2007-04-02 02:12:32 +0200686 /* Reset our private host data, but not our MTU */
687 netif_stop_queue(dev);
688 ether1394_reset_priv(dev, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689
690 list_for_each_entry(node, &priv->ip_node_list, list) {
Greg Kroah-Hartmanbab03052009-04-30 14:43:31 -0700691 node_info = dev_get_drvdata(&node->ud->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692
693 spin_lock_irqsave(&node_info->pdg.lock, flags);
694
Stefan Richterefbeccf2007-04-02 02:12:32 +0200695 list_for_each_safe(lh, n, &node_info->pdg.list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 purge_partial_datagram(lh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697
698 INIT_LIST_HEAD(&(node_info->pdg.list));
699 node_info->pdg.sz = 0;
700
701 spin_unlock_irqrestore(&node_info->pdg.lock, flags);
702 }
703
Stefan Richterefbeccf2007-04-02 02:12:32 +0200704 netif_wake_queue(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705}
706
707/******************************************
708 * HW Header net device functions
709 ******************************************/
710/* These functions have been adapted from net/ethernet/eth.c */
711
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712/* Create a fake MAC header for an arbitrary protocol layer.
713 * saddr=NULL means use device source address
714 * daddr=NULL means leave destination address (eg unresolved arp). */
715static int ether1394_header(struct sk_buff *skb, struct net_device *dev,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700716 unsigned short type, const void *daddr,
717 const void *saddr, unsigned len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718{
Stefan Richterefbeccf2007-04-02 02:12:32 +0200719 struct eth1394hdr *eth =
720 (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721
722 eth->h_proto = htons(type);
723
Stefan Richterefbeccf2007-04-02 02:12:32 +0200724 if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 memset(eth->h_dest, 0, dev->addr_len);
Stefan Richterefbeccf2007-04-02 02:12:32 +0200726 return dev->hard_header_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 }
728
729 if (daddr) {
Stefan Richterefbeccf2007-04-02 02:12:32 +0200730 memcpy(eth->h_dest, daddr, dev->addr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 return dev->hard_header_len;
732 }
733
734 return -dev->hard_header_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735}
736
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737/* Rebuild the faked MAC header. This is called after an ARP
738 * (or in future other address resolution) has completed on this
739 * sk_buff. We now let ARP fill in the other fields.
740 *
741 * This routine CANNOT use cached dst->neigh!
742 * Really, it is used only when dst->neigh is wrong.
743 */
744static int ether1394_rebuild_header(struct sk_buff *skb)
745{
746 struct eth1394hdr *eth = (struct eth1394hdr *)skb->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747
Stefan Richter599bba92007-04-02 02:19:02 +0200748 if (eth->h_proto == htons(ETH_P_IP))
Stefan Richterefbeccf2007-04-02 02:12:32 +0200749 return arp_find((unsigned char *)&eth->h_dest, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750
Stefan Richter599bba92007-04-02 02:19:02 +0200751 ETH1394_PRINT(KERN_DEBUG, skb->dev->name,
752 "unable to resolve type %04x addresses\n",
753 ntohs(eth->h_proto));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 return 0;
755}
756
Stephen Hemmingerb95cce32007-09-26 22:13:38 -0700757static int ether1394_header_parse(const struct sk_buff *skb,
758 unsigned char *haddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759{
Stephen Hemmingerb95cce32007-09-26 22:13:38 -0700760 memcpy(haddr, skb->dev->dev_addr, ETH1394_ALEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 return ETH1394_ALEN;
762}
763
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700764static int ether1394_header_cache(const struct neighbour *neigh,
765 struct hh_cache *hh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766{
Harvey Harrisonfaf26bc2008-12-13 15:03:06 -0800767 __be16 type = hh->hh_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 struct net_device *dev = neigh->dev;
Stefan Richterefbeccf2007-04-02 02:12:32 +0200769 struct eth1394hdr *eth =
770 (struct eth1394hdr *)((u8 *)hh->hh_data + 16 - ETH1394_HLEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771
Ben Collins7136b802006-06-12 18:16:25 -0400772 if (type == htons(ETH_P_802_3))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774
775 eth->h_proto = type;
776 memcpy(eth->h_dest, neigh->ha, dev->addr_len);
777
778 hh->hh_len = ETH1394_HLEN;
779 return 0;
780}
781
782/* Called by Address Resolution module to notify changes in address. */
783static void ether1394_header_cache_update(struct hh_cache *hh,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700784 const struct net_device *dev,
785 const unsigned char * haddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786{
Stefan Richterefbeccf2007-04-02 02:12:32 +0200787 memcpy((u8 *)hh->hh_data + 16 - ETH1394_HLEN, haddr, dev->addr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788}
789
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790/******************************************
791 * Datagram reception code
792 ******************************************/
793
794/* Copied from net/ethernet/eth.c */
Harvey Harrisonfaf26bc2008-12-13 15:03:06 -0800795static __be16 ether1394_type_trans(struct sk_buff *skb, struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796{
797 struct eth1394hdr *eth;
798 unsigned char *rawp;
799
Arnaldo Carvalho de Melo459a98e2007-03-19 15:30:44 -0700800 skb_reset_mac_header(skb);
Stefan Richterefbeccf2007-04-02 02:12:32 +0200801 skb_pull(skb, ETH1394_HLEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 eth = eth1394_hdr(skb);
803
804 if (*eth->h_dest & 1) {
Stefan Richterefbeccf2007-04-02 02:12:32 +0200805 if (memcmp(eth->h_dest, dev->broadcast, dev->addr_len) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 skb->pkt_type = PACKET_BROADCAST;
807#if 0
808 else
809 skb->pkt_type = PACKET_MULTICAST;
810#endif
811 } else {
812 if (memcmp(eth->h_dest, dev->dev_addr, dev->addr_len))
813 skb->pkt_type = PACKET_OTHERHOST;
Stefan Richterefbeccf2007-04-02 02:12:32 +0200814 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815
Stefan Richterefbeccf2007-04-02 02:12:32 +0200816 if (ntohs(eth->h_proto) >= 1536)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 return eth->h_proto;
818
819 rawp = skb->data;
820
Stefan Richterefbeccf2007-04-02 02:12:32 +0200821 if (*(unsigned short *)rawp == 0xFFFF)
822 return htons(ETH_P_802_3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823
Stefan Richterefbeccf2007-04-02 02:12:32 +0200824 return htons(ETH_P_802_2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825}
826
827/* Parse an encapsulated IP1394 header into an ethernet frame packet.
828 * We also perform ARP translation here, if need be. */
Harvey Harrisonfaf26bc2008-12-13 15:03:06 -0800829static __be16 ether1394_parse_encap(struct sk_buff *skb, struct net_device *dev,
Stefan Richtere00f04a2007-03-18 12:23:11 +0100830 nodeid_t srcid, nodeid_t destid,
Harvey Harrisonfaf26bc2008-12-13 15:03:06 -0800831 __be16 ether_type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832{
833 struct eth1394_priv *priv = netdev_priv(dev);
Harvey Harrisonfaf26bc2008-12-13 15:03:06 -0800834 __be64 dest_hw;
835 __be16 ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836
Stefan Richterefbeccf2007-04-02 02:12:32 +0200837 /* Setup our hw addresses. We use these to build the ethernet header. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 if (destid == (LOCAL_BUS | ALL_NODES))
Harvey Harrisonfaf26bc2008-12-13 15:03:06 -0800839 dest_hw = ~cpu_to_be64(0); /* broadcast */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 else
Stefan Richterefbeccf2007-04-02 02:12:32 +0200841 dest_hw = cpu_to_be64((u64)priv->host->csr.guid_hi << 32 |
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 priv->host->csr.guid_lo);
843
844 /* If this is an ARP packet, convert it. First, we want to make
845 * use of some of the fields, since they tell us a little bit
846 * about the sending machine. */
Ben Collins7136b802006-06-12 18:16:25 -0400847 if (ether_type == htons(ETH_P_ARP)) {
Stefan Richterefbeccf2007-04-02 02:12:32 +0200848 struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 struct arphdr *arp = (struct arphdr *)skb->data;
850 unsigned char *arp_ptr = (unsigned char *)(arp + 1);
851 u64 fifo_addr = (u64)ntohs(arp1394->fifo_hi) << 32 |
Stefan Richterefbeccf2007-04-02 02:12:32 +0200852 ntohl(arp1394->fifo_lo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 u8 max_rec = min(priv->host->csr.max_rec,
854 (u8)(arp1394->max_rec));
855 int sspd = arp1394->sspd;
856 u16 maxpayload;
857 struct eth1394_node_ref *node;
858 struct eth1394_node_info *node_info;
David S. Millerc20e3942006-10-29 16:14:55 -0800859 __be64 guid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860
861 /* Sanity check. MacOSX seems to be sending us 131 in this
862 * field (atleast on my Panther G5). Not sure why. */
863 if (sspd > 5 || sspd < 0)
864 sspd = 0;
865
Stefan Richterefbeccf2007-04-02 02:12:32 +0200866 maxpayload = min(eth1394_speedto_maxpayload[sspd],
867 (u16)(1 << (max_rec + 1)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868
David S. Millerc20e3942006-10-29 16:14:55 -0800869 guid = get_unaligned(&arp1394->s_uniq_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 node = eth1394_find_node_guid(&priv->ip_node_list,
David S. Millerc20e3942006-10-29 16:14:55 -0800871 be64_to_cpu(guid));
Stefan Richterefbeccf2007-04-02 02:12:32 +0200872 if (!node)
Harvey Harrisonfaf26bc2008-12-13 15:03:06 -0800873 return cpu_to_be16(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874
Greg Kroah-Hartmanbab03052009-04-30 14:43:31 -0700875 node_info = dev_get_drvdata(&node->ud->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876
877 /* Update our speed/payload/fifo_offset table */
878 node_info->maxpayload = maxpayload;
879 node_info->sspd = sspd;
880 node_info->fifo = fifo_addr;
881
882 /* Now that we're done with the 1394 specific stuff, we'll
883 * need to alter some of the data. Believe it or not, all
884 * that needs to be done is sender_IP_address needs to be
885 * moved, the destination hardware address get stuffed
886 * in and the hardware address length set to 8.
887 *
888 * IMPORTANT: The code below overwrites 1394 specific data
889 * needed above so keep the munging of the data for the
890 * higher level IP stack last. */
891
892 arp->ar_hln = 8;
893 arp_ptr += arp->ar_hln; /* skip over sender unique id */
Stefan Richterefbeccf2007-04-02 02:12:32 +0200894 *(u32 *)arp_ptr = arp1394->sip; /* move sender IP addr */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 arp_ptr += arp->ar_pln; /* skip over sender IP addr */
896
Ben Collins02f42132006-06-12 18:15:11 -0400897 if (arp->ar_op == htons(ARPOP_REQUEST))
David S. Millerc20e3942006-10-29 16:14:55 -0800898 memset(arp_ptr, 0, sizeof(u64));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 else
David S. Millerc20e3942006-10-29 16:14:55 -0800900 memcpy(arp_ptr, dev->dev_addr, sizeof(u64));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 }
902
903 /* Now add the ethernet header. */
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700904 if (dev_hard_header(skb, dev, ntohs(ether_type), &dest_hw, NULL,
905 skb->len) >= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 ret = ether1394_type_trans(skb, dev);
907
908 return ret;
909}
910
Stefan Richtere00f04a2007-03-18 12:23:11 +0100911static int fragment_overlap(struct list_head *frag_list, int offset, int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912{
913 struct fragment_info *fi;
Stefan Richter2e2173d2007-04-02 02:21:46 +0200914 int end = offset + len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915
Stefan Richter2e2173d2007-04-02 02:21:46 +0200916 list_for_each_entry(fi, frag_list, list)
917 if (offset < fi->offset + fi->len && end > fi->offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918 return 1;
Stefan Richter2e2173d2007-04-02 02:21:46 +0200919
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 return 0;
921}
922
Stefan Richtere00f04a2007-03-18 12:23:11 +0100923static struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924{
925 struct partial_datagram *pd;
926
Stefan Richterefbeccf2007-04-02 02:12:32 +0200927 list_for_each_entry(pd, pdgl, list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 if (pd->dgl == dgl)
929 return &pd->list;
Stefan Richterefbeccf2007-04-02 02:12:32 +0200930
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 return NULL;
932}
933
934/* Assumes that new fragment does not overlap any existing fragments */
Stefan Richtere00f04a2007-03-18 12:23:11 +0100935static int new_fragment(struct list_head *frag_info, int offset, int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936{
937 struct list_head *lh;
938 struct fragment_info *fi, *fi2, *new;
939
940 list_for_each(lh, frag_info) {
941 fi = list_entry(lh, struct fragment_info, list);
Stefan Richterefbeccf2007-04-02 02:12:32 +0200942 if (fi->offset + fi->len == offset) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 /* The new fragment can be tacked on to the end */
944 fi->len += len;
945 /* Did the new fragment plug a hole? */
946 fi2 = list_entry(lh->next, struct fragment_info, list);
Stefan Richterefbeccf2007-04-02 02:12:32 +0200947 if (fi->offset + fi->len == fi2->offset) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 /* glue fragments together */
949 fi->len += fi2->len;
950 list_del(lh->next);
951 kfree(fi2);
952 }
953 return 0;
Stefan Richterefbeccf2007-04-02 02:12:32 +0200954 } else if (offset + len == fi->offset) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 /* The new fragment can be tacked on to the beginning */
956 fi->offset = offset;
957 fi->len += len;
958 /* Did the new fragment plug a hole? */
959 fi2 = list_entry(lh->prev, struct fragment_info, list);
Stefan Richterefbeccf2007-04-02 02:12:32 +0200960 if (fi2->offset + fi2->len == fi->offset) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961 /* glue fragments together */
962 fi2->len += fi->len;
963 list_del(lh);
964 kfree(fi);
965 }
966 return 0;
Stefan Richterefbeccf2007-04-02 02:12:32 +0200967 } else if (offset > fi->offset + fi->len) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 break;
Stefan Richterefbeccf2007-04-02 02:12:32 +0200969 } else if (offset + len < fi->offset) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 lh = lh->prev;
971 break;
972 }
973 }
974
Stefan Richter85511582005-11-07 06:31:45 -0500975 new = kmalloc(sizeof(*new), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 if (!new)
977 return -ENOMEM;
978
979 new->offset = offset;
980 new->len = len;
981
982 list_add(&new->list, lh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983 return 0;
984}
985
Stefan Richtere00f04a2007-03-18 12:23:11 +0100986static int new_partial_datagram(struct net_device *dev, struct list_head *pdgl,
987 int dgl, int dg_size, char *frag_buf,
988 int frag_off, int frag_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989{
990 struct partial_datagram *new;
991
Stefan Richter85511582005-11-07 06:31:45 -0500992 new = kmalloc(sizeof(*new), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 if (!new)
994 return -ENOMEM;
995
996 INIT_LIST_HEAD(&new->frag_info);
997
998 if (new_fragment(&new->frag_info, frag_off, frag_len) < 0) {
999 kfree(new);
1000 return -ENOMEM;
1001 }
1002
1003 new->dgl = dgl;
1004 new->dg_size = dg_size;
1005
1006 new->skb = dev_alloc_skb(dg_size + dev->hard_header_len + 15);
1007 if (!new->skb) {
1008 struct fragment_info *fi = list_entry(new->frag_info.next,
1009 struct fragment_info,
1010 list);
1011 kfree(fi);
1012 kfree(new);
1013 return -ENOMEM;
1014 }
1015
1016 skb_reserve(new->skb, (dev->hard_header_len + 15) & ~15);
1017 new->pbuf = skb_put(new->skb, dg_size);
1018 memcpy(new->pbuf + frag_off, frag_buf, frag_len);
1019
1020 list_add(&new->list, pdgl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 return 0;
1022}
1023
Stefan Richtere00f04a2007-03-18 12:23:11 +01001024static int update_partial_datagram(struct list_head *pdgl, struct list_head *lh,
1025 char *frag_buf, int frag_off, int frag_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026{
Stefan Richterefbeccf2007-04-02 02:12:32 +02001027 struct partial_datagram *pd =
1028 list_entry(lh, struct partial_datagram, list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029
Stefan Richterefbeccf2007-04-02 02:12:32 +02001030 if (new_fragment(&pd->frag_info, frag_off, frag_len) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032
1033 memcpy(pd->pbuf + frag_off, frag_buf, frag_len);
1034
1035 /* Move list entry to beginnig of list so that oldest partial
1036 * datagrams percolate to the end of the list */
Akinobu Mita179e0912006-06-26 00:24:41 -07001037 list_move(lh, pdgl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 return 0;
1039}
1040
Stefan Richtere00f04a2007-03-18 12:23:11 +01001041static int is_datagram_complete(struct list_head *lh, int dg_size)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042{
Stefan Richtere00f04a2007-03-18 12:23:11 +01001043 struct partial_datagram *pd;
1044 struct fragment_info *fi;
1045
1046 pd = list_entry(lh, struct partial_datagram, list);
1047 fi = list_entry(pd->frag_info.next, struct fragment_info, list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048
1049 return (fi->len == dg_size);
1050}
1051
1052/* Packet reception. We convert the IP1394 encapsulation header to an
1053 * ethernet header, and fill it with some of our other fields. This is
1054 * an incoming packet from the 1394 bus. */
1055static int ether1394_data_handler(struct net_device *dev, int srcid, int destid,
1056 char *buf, int len)
1057{
1058 struct sk_buff *skb;
1059 unsigned long flags;
1060 struct eth1394_priv *priv = netdev_priv(dev);
1061 union eth1394_hdr *hdr = (union eth1394_hdr *)buf;
Harvey Harrisonfaf26bc2008-12-13 15:03:06 -08001062 __be16 ether_type = cpu_to_be16(0); /* initialized to clear warning */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 int hdr_len;
1064 struct unit_directory *ud = priv->ud_list[NODEID_TO_NODE(srcid)];
1065 struct eth1394_node_info *node_info;
1066
1067 if (!ud) {
1068 struct eth1394_node_ref *node;
1069 node = eth1394_find_node_nodeid(&priv->ip_node_list, srcid);
Stefan Richter09939872007-04-02 02:22:21 +02001070 if (unlikely(!node)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071 HPSB_PRINT(KERN_ERR, "ether1394 rx: sender nodeid "
1072 "lookup failure: " NODE_BUS_FMT,
1073 NODE_BUS_ARGS(priv->host, srcid));
Stephen Hemminger92dc8cc2009-01-06 12:56:50 +00001074 dev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 return -1;
1076 }
1077 ud = node->ud;
1078
1079 priv->ud_list[NODEID_TO_NODE(srcid)] = ud;
1080 }
1081
Greg Kroah-Hartmanbab03052009-04-30 14:43:31 -07001082 node_info = dev_get_drvdata(&ud->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083
1084 /* First, did we receive a fragmented or unfragmented datagram? */
1085 hdr->words.word1 = ntohs(hdr->words.word1);
1086
1087 hdr_len = hdr_type_len[hdr->common.lf];
1088
1089 if (hdr->common.lf == ETH1394_HDR_LF_UF) {
1090 /* An unfragmented datagram has been received by the ieee1394
1091 * bus. Build an skbuff around it so we can pass it to the
1092 * high level network layer. */
1093
1094 skb = dev_alloc_skb(len + dev->hard_header_len + 15);
Stefan Richter09939872007-04-02 02:22:21 +02001095 if (unlikely(!skb)) {
Stefan Richter5009d262007-04-02 02:15:53 +02001096 ETH1394_PRINT_G(KERN_ERR, "Out of memory\n");
Stephen Hemminger92dc8cc2009-01-06 12:56:50 +00001097 dev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 return -1;
1099 }
1100 skb_reserve(skb, (dev->hard_header_len + 15) & ~15);
Stefan Richterefbeccf2007-04-02 02:12:32 +02001101 memcpy(skb_put(skb, len - hdr_len), buf + hdr_len,
1102 len - hdr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 ether_type = hdr->uf.ether_type;
1104 } else {
1105 /* A datagram fragment has been received, now the fun begins. */
1106
1107 struct list_head *pdgl, *lh;
1108 struct partial_datagram *pd;
1109 int fg_off;
1110 int fg_len = len - hdr_len;
1111 int dg_size;
1112 int dgl;
1113 int retval;
1114 struct pdg_list *pdg = &(node_info->pdg);
1115
1116 hdr->words.word3 = ntohs(hdr->words.word3);
1117 /* The 4th header word is reserved so no need to do ntohs() */
1118
1119 if (hdr->common.lf == ETH1394_HDR_LF_FF) {
1120 ether_type = hdr->ff.ether_type;
1121 dgl = hdr->ff.dgl;
1122 dg_size = hdr->ff.dg_size + 1;
1123 fg_off = 0;
1124 } else {
1125 hdr->words.word2 = ntohs(hdr->words.word2);
1126 dgl = hdr->sf.dgl;
1127 dg_size = hdr->sf.dg_size + 1;
1128 fg_off = hdr->sf.fg_off;
1129 }
1130 spin_lock_irqsave(&pdg->lock, flags);
1131
1132 pdgl = &(pdg->list);
1133 lh = find_partial_datagram(pdgl, dgl);
1134
1135 if (lh == NULL) {
1136 while (pdg->sz >= max_partial_datagrams) {
1137 /* remove the oldest */
1138 purge_partial_datagram(pdgl->prev);
1139 pdg->sz--;
1140 }
1141
1142 retval = new_partial_datagram(dev, pdgl, dgl, dg_size,
1143 buf + hdr_len, fg_off,
1144 fg_len);
1145 if (retval < 0) {
1146 spin_unlock_irqrestore(&pdg->lock, flags);
1147 goto bad_proto;
1148 }
1149 pdg->sz++;
1150 lh = find_partial_datagram(pdgl, dgl);
1151 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152 pd = list_entry(lh, struct partial_datagram, list);
1153
1154 if (fragment_overlap(&pd->frag_info, fg_off, fg_len)) {
1155 /* Overlapping fragments, obliterate old
1156 * datagram and start new one. */
1157 purge_partial_datagram(lh);
1158 retval = new_partial_datagram(dev, pdgl, dgl,
1159 dg_size,
1160 buf + hdr_len,
1161 fg_off, fg_len);
1162 if (retval < 0) {
1163 pdg->sz--;
1164 spin_unlock_irqrestore(&pdg->lock, flags);
1165 goto bad_proto;
1166 }
1167 } else {
1168 retval = update_partial_datagram(pdgl, lh,
1169 buf + hdr_len,
1170 fg_off, fg_len);
1171 if (retval < 0) {
1172 /* Couldn't save off fragment anyway
1173 * so might as well obliterate the
1174 * datagram now. */
1175 purge_partial_datagram(lh);
1176 pdg->sz--;
1177 spin_unlock_irqrestore(&pdg->lock, flags);
1178 goto bad_proto;
1179 }
1180 } /* fragment overlap */
1181 } /* new datagram or add to existing one */
1182
1183 pd = list_entry(lh, struct partial_datagram, list);
1184
Stefan Richterefbeccf2007-04-02 02:12:32 +02001185 if (hdr->common.lf == ETH1394_HDR_LF_FF)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186 pd->ether_type = ether_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187
1188 if (is_datagram_complete(lh, dg_size)) {
1189 ether_type = pd->ether_type;
1190 pdg->sz--;
1191 skb = skb_get(pd->skb);
1192 purge_partial_datagram(lh);
1193 spin_unlock_irqrestore(&pdg->lock, flags);
1194 } else {
1195 /* Datagram is not complete, we're done for the
1196 * moment. */
1197 spin_unlock_irqrestore(&pdg->lock, flags);
1198 return 0;
1199 }
1200 } /* unframgented datagram or fragmented one */
1201
1202 /* Write metadata, and then pass to the receive level */
1203 skb->dev = dev;
1204 skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */
1205
1206 /* Parse the encapsulation header. This actually does the job of
1207 * converting to an ethernet frame header, aswell as arp
1208 * conversion if needed. ARP conversion is easier in this
1209 * direction, since we are using ethernet as our backend. */
1210 skb->protocol = ether1394_parse_encap(skb, dev, srcid, destid,
1211 ether_type);
1212
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213 spin_lock_irqsave(&priv->lock, flags);
Stefan Richterefbeccf2007-04-02 02:12:32 +02001214
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215 if (!skb->protocol) {
Stephen Hemminger92dc8cc2009-01-06 12:56:50 +00001216 dev->stats.rx_errors++;
1217 dev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218 dev_kfree_skb_any(skb);
Stefan Richter661afca2007-07-28 23:45:03 +02001219 } else if (netif_rx(skb) == NET_RX_DROP) {
Stephen Hemminger92dc8cc2009-01-06 12:56:50 +00001220 dev->stats.rx_errors++;
1221 dev->stats.rx_dropped++;
Stefan Richter661afca2007-07-28 23:45:03 +02001222 } else {
Stephen Hemminger92dc8cc2009-01-06 12:56:50 +00001223 dev->stats.rx_packets++;
1224 dev->stats.rx_bytes += skb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225 }
1226
Stefan Richter661afca2007-07-28 23:45:03 +02001227 spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228
1229bad_proto:
1230 if (netif_queue_stopped(dev))
1231 netif_wake_queue(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233 return 0;
1234}
1235
1236static int ether1394_write(struct hpsb_host *host, int srcid, int destid,
1237 quadlet_t *data, u64 addr, size_t len, u16 flags)
1238{
1239 struct eth1394_host_info *hi;
1240
1241 hi = hpsb_get_hostinfo(&eth1394_highlevel, host);
Stefan Richter09939872007-04-02 02:22:21 +02001242 if (unlikely(!hi)) {
Stefan Richter5009d262007-04-02 02:15:53 +02001243 ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n",
1244 host->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 return RCODE_ADDRESS_ERROR;
1246 }
1247
1248 if (ether1394_data_handler(hi->dev, srcid, destid, (char*)data, len))
1249 return RCODE_ADDRESS_ERROR;
1250 else
1251 return RCODE_COMPLETE;
1252}
1253
1254static void ether1394_iso(struct hpsb_iso *iso)
1255{
Harvey Harrisonfaf26bc2008-12-13 15:03:06 -08001256 __be32 *data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257 char *buf;
1258 struct eth1394_host_info *hi;
1259 struct net_device *dev;
1260 struct eth1394_priv *priv;
1261 unsigned int len;
1262 u32 specifier_id;
1263 u16 source_id;
1264 int i;
1265 int nready;
1266
1267 hi = hpsb_get_hostinfo(&eth1394_highlevel, iso->host);
Stefan Richter09939872007-04-02 02:22:21 +02001268 if (unlikely(!hi)) {
Stefan Richter5009d262007-04-02 02:15:53 +02001269 ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n",
1270 iso->host->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271 return;
1272 }
1273
1274 dev = hi->dev;
1275
1276 nready = hpsb_iso_n_ready(iso);
1277 for (i = 0; i < nready; i++) {
1278 struct hpsb_iso_packet_info *info =
1279 &iso->infos[(iso->first_packet + i) % iso->buf_packets];
Harvey Harrisonfaf26bc2008-12-13 15:03:06 -08001280 data = (__be32 *)(iso->data_buf.kvirt + info->offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281
1282 /* skip over GASP header */
1283 buf = (char *)data + 8;
1284 len = info->len - 8;
1285
Stefan Richterefbeccf2007-04-02 02:12:32 +02001286 specifier_id = (be32_to_cpu(data[0]) & 0xffff) << 8 |
1287 (be32_to_cpu(data[1]) & 0xff000000) >> 24;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 source_id = be32_to_cpu(data[0]) >> 16;
1289
1290 priv = netdev_priv(dev);
1291
Stefan Richterefbeccf2007-04-02 02:12:32 +02001292 if (info->channel != (iso->host->csr.broadcast_channel & 0x3f)
1293 || specifier_id != ETHER1394_GASP_SPECIFIER_ID) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294 /* This packet is not for us */
1295 continue;
1296 }
1297 ether1394_data_handler(dev, source_id, LOCAL_BUS | ALL_NODES,
1298 buf, len);
1299 }
1300
1301 hpsb_iso_recv_release_packets(iso, i);
1302
1303 dev->last_rx = jiffies;
1304}
1305
1306/******************************************
1307 * Datagram transmission code
1308 ******************************************/
1309
1310/* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire
1311 * arphdr) is the same format as the ip1394 header, so they overlap. The rest
1312 * needs to be munged a bit. The remainder of the arphdr is formatted based
1313 * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to
1314 * judge.
1315 *
1316 * Now that the EUI is used for the hardware address all we need to do to make
1317 * this work for 1394 is to insert 2 quadlets that contain max_rec size,
1318 * speed, and unicast FIFO address information between the sender_unique_id
1319 * and the IP addresses.
1320 */
Stefan Richtere00f04a2007-03-18 12:23:11 +01001321static void ether1394_arp_to_1394arp(struct sk_buff *skb,
1322 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323{
1324 struct eth1394_priv *priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325 struct arphdr *arp = (struct arphdr *)skb->data;
1326 unsigned char *arp_ptr = (unsigned char *)(arp + 1);
1327 struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data;
1328
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 arp1394->hw_addr_len = 16;
1330 arp1394->sip = *(u32*)(arp_ptr + ETH1394_ALEN);
1331 arp1394->max_rec = priv->host->csr.max_rec;
1332 arp1394->sspd = priv->host->csr.lnk_spd;
Stefan Richterefbeccf2007-04-02 02:12:32 +02001333 arp1394->fifo_hi = htons(priv->local_fifo >> 32);
1334 arp1394->fifo_lo = htonl(priv->local_fifo & ~0x0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335}
1336
1337/* We need to encapsulate the standard header with our own. We use the
1338 * ethernet header's proto for our own. */
Stefan Richtere00f04a2007-03-18 12:23:11 +01001339static unsigned int ether1394_encapsulate_prep(unsigned int max_payload,
1340 __be16 proto,
1341 union eth1394_hdr *hdr,
1342 u16 dg_size, u16 dgl)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343{
Stefan Richterefbeccf2007-04-02 02:12:32 +02001344 unsigned int adj_max_payload =
1345 max_payload - hdr_type_len[ETH1394_HDR_LF_UF];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346
1347 /* Does it all fit in one packet? */
1348 if (dg_size <= adj_max_payload) {
1349 hdr->uf.lf = ETH1394_HDR_LF_UF;
1350 hdr->uf.ether_type = proto;
1351 } else {
1352 hdr->ff.lf = ETH1394_HDR_LF_FF;
1353 hdr->ff.ether_type = proto;
1354 hdr->ff.dg_size = dg_size - 1;
1355 hdr->ff.dgl = dgl;
1356 adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_FF];
1357 }
Julia Lawall68e2aa72008-08-02 17:13:09 +02001358 return DIV_ROUND_UP(dg_size, adj_max_payload);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359}
1360
Stefan Richtere00f04a2007-03-18 12:23:11 +01001361static unsigned int ether1394_encapsulate(struct sk_buff *skb,
1362 unsigned int max_payload,
1363 union eth1394_hdr *hdr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364{
1365 union eth1394_hdr *bufhdr;
1366 int ftype = hdr->common.lf;
1367 int hdrsz = hdr_type_len[ftype];
1368 unsigned int adj_max_payload = max_payload - hdrsz;
1369
Stefan Richterefbeccf2007-04-02 02:12:32 +02001370 switch (ftype) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371 case ETH1394_HDR_LF_UF:
1372 bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz);
1373 bufhdr->words.word1 = htons(hdr->words.word1);
1374 bufhdr->words.word2 = hdr->words.word2;
1375 break;
1376
1377 case ETH1394_HDR_LF_FF:
1378 bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz);
1379 bufhdr->words.word1 = htons(hdr->words.word1);
1380 bufhdr->words.word2 = hdr->words.word2;
1381 bufhdr->words.word3 = htons(hdr->words.word3);
1382 bufhdr->words.word4 = 0;
1383
1384 /* Set frag type here for future interior fragments */
1385 hdr->common.lf = ETH1394_HDR_LF_IF;
1386 hdr->sf.fg_off = 0;
1387 break;
1388
1389 default:
1390 hdr->sf.fg_off += adj_max_payload;
1391 bufhdr = (union eth1394_hdr *)skb_pull(skb, adj_max_payload);
1392 if (max_payload >= skb->len)
1393 hdr->common.lf = ETH1394_HDR_LF_LF;
1394 bufhdr->words.word1 = htons(hdr->words.word1);
1395 bufhdr->words.word2 = htons(hdr->words.word2);
1396 bufhdr->words.word3 = htons(hdr->words.word3);
1397 bufhdr->words.word4 = 0;
1398 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399 return min(max_payload, skb->len);
1400}
1401
Stefan Richtere00f04a2007-03-18 12:23:11 +01001402static struct hpsb_packet *ether1394_alloc_common_packet(struct hpsb_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403{
1404 struct hpsb_packet *p;
1405
1406 p = hpsb_alloc_packet(0);
1407 if (p) {
1408 p->host = host;
1409 p->generation = get_hpsb_generation(host);
1410 p->type = hpsb_async;
1411 }
1412 return p;
1413}
1414
Stefan Richtere00f04a2007-03-18 12:23:11 +01001415static int ether1394_prep_write_packet(struct hpsb_packet *p,
1416 struct hpsb_host *host, nodeid_t node,
Stefan Richterefbeccf2007-04-02 02:12:32 +02001417 u64 addr, void *data, int tx_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418{
1419 p->node_id = node;
Stefan Richter7a97bc02007-05-05 17:25:51 +02001420
1421 if (hpsb_get_tlabel(p))
1422 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423
1424 p->tcode = TCODE_WRITEB;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425 p->header_size = 16;
1426 p->expect_response = 1;
Stefan Richterefbeccf2007-04-02 02:12:32 +02001427 p->header[0] =
1428 p->node_id << 16 | p->tlabel << 10 | 1 << 8 | TCODE_WRITEB << 4;
Stefan Richter7a97bc02007-05-05 17:25:51 +02001429 p->header[1] = host->node_id << 16 | addr >> 32;
1430 p->header[2] = addr & 0xffffffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431 p->header[3] = tx_len << 16;
1432 p->data_size = (tx_len + 3) & ~3;
Stefan Richterefbeccf2007-04-02 02:12:32 +02001433 p->data = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434
1435 return 0;
1436}
1437
Stefan Richtere00f04a2007-03-18 12:23:11 +01001438static void ether1394_prep_gasp_packet(struct hpsb_packet *p,
1439 struct eth1394_priv *priv,
1440 struct sk_buff *skb, int length)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441{
1442 p->header_size = 4;
1443 p->tcode = TCODE_STREAM_DATA;
1444
Stefan Richterefbeccf2007-04-02 02:12:32 +02001445 p->header[0] = length << 16 | 3 << 14 | priv->broadcast_channel << 8 |
1446 TCODE_STREAM_DATA << 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447 p->data_size = length;
Stefan Richterefbeccf2007-04-02 02:12:32 +02001448 p->data = (quadlet_t *)skb->data - 2;
1449 p->data[0] = cpu_to_be32(priv->host->node_id << 16 |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450 ETHER1394_GASP_SPECIFIER_ID_HI);
Stefan Richterefbeccf2007-04-02 02:12:32 +02001451 p->data[1] = cpu_to_be32(ETHER1394_GASP_SPECIFIER_ID_LO << 24 |
Ben Collins7136b802006-06-12 18:16:25 -04001452 ETHER1394_GASP_VERSION);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453
Linus Torvalds1da177e2005-04-16 15:20:36 -07001454 p->speed_code = priv->bc_sspd;
Stefan Richter21b2c562007-04-23 21:28:47 +02001455
1456 /* prevent hpsb_send_packet() from overriding our speed code */
1457 p->node_id = LOCAL_BUS | ALL_NODES;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458}
1459
Stefan Richtere00f04a2007-03-18 12:23:11 +01001460static void ether1394_free_packet(struct hpsb_packet *packet)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461{
1462 if (packet->tcode != TCODE_STREAM_DATA)
1463 hpsb_free_tlabel(packet);
1464 hpsb_free_packet(packet);
1465}
1466
1467static void ether1394_complete_cb(void *__ptask);
1468
1469static int ether1394_send_packet(struct packet_task *ptask, unsigned int tx_len)
1470{
1471 struct eth1394_priv *priv = ptask->priv;
1472 struct hpsb_packet *packet = NULL;
1473
1474 packet = ether1394_alloc_common_packet(priv->host);
1475 if (!packet)
Stefan Richter7a97bc02007-05-05 17:25:51 +02001476 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477
1478 if (ptask->tx_type == ETH1394_GASP) {
Stefan Richterefbeccf2007-04-02 02:12:32 +02001479 int length = tx_len + 2 * sizeof(quadlet_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480
1481 ether1394_prep_gasp_packet(packet, priv, ptask->skb, length);
1482 } else if (ether1394_prep_write_packet(packet, priv->host,
1483 ptask->dest_node,
1484 ptask->addr, ptask->skb->data,
1485 tx_len)) {
1486 hpsb_free_packet(packet);
Stefan Richter7a97bc02007-05-05 17:25:51 +02001487 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488 }
1489
1490 ptask->packet = packet;
1491 hpsb_set_packet_complete_task(ptask->packet, ether1394_complete_cb,
1492 ptask);
1493
1494 if (hpsb_send_packet(packet) < 0) {
1495 ether1394_free_packet(packet);
Stefan Richter7a97bc02007-05-05 17:25:51 +02001496 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497 }
1498
1499 return 0;
1500}
1501
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502/* Task function to be run when a datagram transmission is completed */
Stefan Richtere00f04a2007-03-18 12:23:11 +01001503static void ether1394_dg_complete(struct packet_task *ptask, int fail)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504{
1505 struct sk_buff *skb = ptask->skb;
Stephen Hemminger92dc8cc2009-01-06 12:56:50 +00001506 struct net_device *dev = skb->dev;
1507 struct eth1394_priv *priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001508 unsigned long flags;
1509
1510 /* Statistics */
1511 spin_lock_irqsave(&priv->lock, flags);
1512 if (fail) {
Stephen Hemminger92dc8cc2009-01-06 12:56:50 +00001513 dev->stats.tx_dropped++;
1514 dev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515 } else {
Stephen Hemminger92dc8cc2009-01-06 12:56:50 +00001516 dev->stats.tx_bytes += skb->len;
1517 dev->stats.tx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518 }
1519 spin_unlock_irqrestore(&priv->lock, flags);
1520
1521 dev_kfree_skb_any(skb);
1522 kmem_cache_free(packet_task_cache, ptask);
1523}
1524
Linus Torvalds1da177e2005-04-16 15:20:36 -07001525/* Callback for when a packet has been sent and the status of that packet is
1526 * known */
1527static void ether1394_complete_cb(void *__ptask)
1528{
1529 struct packet_task *ptask = (struct packet_task *)__ptask;
1530 struct hpsb_packet *packet = ptask->packet;
1531 int fail = 0;
1532
1533 if (packet->tcode != TCODE_STREAM_DATA)
1534 fail = hpsb_packet_success(packet);
1535
1536 ether1394_free_packet(packet);
1537
1538 ptask->outstanding_pkts--;
1539 if (ptask->outstanding_pkts > 0 && !fail) {
Stefan Richter7a97bc02007-05-05 17:25:51 +02001540 int tx_len, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001541
1542 /* Add the encapsulation header to the fragment */
1543 tx_len = ether1394_encapsulate(ptask->skb, ptask->max_payload,
1544 &ptask->hdr);
Stefan Richter7a97bc02007-05-05 17:25:51 +02001545 err = ether1394_send_packet(ptask, tx_len);
1546 if (err) {
1547 if (err == -EAGAIN)
1548 ETH1394_PRINT_G(KERN_ERR, "Out of tlabels\n");
1549
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550 ether1394_dg_complete(ptask, 1);
Stefan Richter7a97bc02007-05-05 17:25:51 +02001551 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552 } else {
1553 ether1394_dg_complete(ptask, fail);
1554 }
1555}
1556
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557/* Transmit a packet (called by kernel) */
Stefan Richterefbeccf2007-04-02 02:12:32 +02001558static int ether1394_tx(struct sk_buff *skb, struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559{
Carlos E. Ugarte18b46172007-06-04 11:49:19 -04001560 struct eth1394hdr hdr_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001561 struct eth1394_priv *priv = netdev_priv(dev);
Ben Collins02f42132006-06-12 18:15:11 -04001562 __be16 proto;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563 unsigned long flags;
1564 nodeid_t dest_node;
1565 eth1394_tx_type tx_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566 unsigned int tx_len;
1567 unsigned int max_payload;
1568 u16 dg_size;
1569 u16 dgl;
1570 struct packet_task *ptask;
1571 struct eth1394_node_ref *node;
1572 struct eth1394_node_info *node_info = NULL;
1573
Stefan Richter53f374e2007-04-02 02:23:19 +02001574 ptask = kmem_cache_alloc(packet_task_cache, GFP_ATOMIC);
Stefan Richterfdc00922007-04-02 02:24:27 +02001575 if (ptask == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577
1578 /* XXX Ignore this for now. Noticed that when MacOSX is the IRM,
1579 * it does not set our validity bit. We need to compensate for
1580 * that somewhere else, but not in eth1394. */
1581#if 0
Stefan Richterfdc00922007-04-02 02:24:27 +02001582 if ((priv->host->csr.broadcast_channel & 0xc0000000) != 0xc0000000)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584#endif
1585
Stefan Richter53f374e2007-04-02 02:23:19 +02001586 skb = skb_share_check(skb, GFP_ATOMIC);
Stefan Richterfdc00922007-04-02 02:24:27 +02001587 if (!skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001589
Carlos E. Ugarte18b46172007-06-04 11:49:19 -04001590 /* Get rid of the fake eth1394 header, but first make a copy.
1591 * We might need to rebuild the header on tx failure. */
1592 memcpy(&hdr_buf, skb->data, sizeof(hdr_buf));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001593 skb_pull(skb, ETH1394_HLEN);
1594
Carlos E. Ugarte18b46172007-06-04 11:49:19 -04001595 proto = hdr_buf.h_proto;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001596 dg_size = skb->len;
1597
1598 /* Set the transmission type for the packet. ARP packets and IP
1599 * broadcast packets are sent via GASP. */
Carlos E. Ugarte18b46172007-06-04 11:49:19 -04001600 if (memcmp(hdr_buf.h_dest, dev->broadcast, ETH1394_ALEN) == 0 ||
Ben Collins7136b802006-06-12 18:16:25 -04001601 proto == htons(ETH_P_ARP) ||
1602 (proto == htons(ETH_P_IP) &&
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -07001603 IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604 tx_type = ETH1394_GASP;
1605 dest_node = LOCAL_BUS | ALL_NODES;
1606 max_payload = priv->bc_maxpayload - ETHER1394_GASP_OVERHEAD;
Stefan Richterefbeccf2007-04-02 02:12:32 +02001607 BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608 dgl = priv->bc_dgl;
1609 if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF])
1610 priv->bc_dgl++;
1611 } else {
Harvey Harrisonfaf26bc2008-12-13 15:03:06 -08001612 __be64 guid = get_unaligned((__be64 *)hdr_buf.h_dest);
David S. Millerc20e3942006-10-29 16:14:55 -08001613
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614 node = eth1394_find_node_guid(&priv->ip_node_list,
David S. Millerc20e3942006-10-29 16:14:55 -08001615 be64_to_cpu(guid));
Stefan Richterfdc00922007-04-02 02:24:27 +02001616 if (!node)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001617 goto fail;
Stefan Richterfdc00922007-04-02 02:24:27 +02001618
Greg Kroah-Hartmanbab03052009-04-30 14:43:31 -07001619 node_info = dev_get_drvdata(&node->ud->device);
Stefan Richterfdc00922007-04-02 02:24:27 +02001620 if (node_info->fifo == CSR1212_INVALID_ADDR_SPACE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622
1623 dest_node = node->ud->ne->nodeid;
1624 max_payload = node_info->maxpayload;
Stefan Richterefbeccf2007-04-02 02:12:32 +02001625 BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626
1627 dgl = node_info->dgl;
1628 if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF])
1629 node_info->dgl++;
1630 tx_type = ETH1394_WRREQ;
1631 }
1632
1633 /* If this is an ARP packet, convert it */
Ben Collins7136b802006-06-12 18:16:25 -04001634 if (proto == htons(ETH_P_ARP))
Stefan Richterefbeccf2007-04-02 02:12:32 +02001635 ether1394_arp_to_1394arp(skb, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636
1637 ptask->hdr.words.word1 = 0;
1638 ptask->hdr.words.word2 = 0;
1639 ptask->hdr.words.word3 = 0;
1640 ptask->hdr.words.word4 = 0;
1641 ptask->skb = skb;
1642 ptask->priv = priv;
1643 ptask->tx_type = tx_type;
1644
1645 if (tx_type != ETH1394_GASP) {
1646 u64 addr;
1647
1648 spin_lock_irqsave(&priv->lock, flags);
1649 addr = node_info->fifo;
1650 spin_unlock_irqrestore(&priv->lock, flags);
1651
1652 ptask->addr = addr;
1653 ptask->dest_node = dest_node;
1654 }
1655
1656 ptask->tx_type = tx_type;
1657 ptask->max_payload = max_payload;
Stefan Richterefbeccf2007-04-02 02:12:32 +02001658 ptask->outstanding_pkts = ether1394_encapsulate_prep(max_payload,
1659 proto, &ptask->hdr, dg_size, dgl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660
1661 /* Add the encapsulation header to the fragment */
1662 tx_len = ether1394_encapsulate(skb, max_payload, &ptask->hdr);
1663 dev->trans_start = jiffies;
Stefan Richter7a97bc02007-05-05 17:25:51 +02001664 if (ether1394_send_packet(ptask, tx_len)) {
1665 if (dest_node == (LOCAL_BUS | ALL_NODES))
1666 goto fail;
1667
Carlos E. Ugarte18b46172007-06-04 11:49:19 -04001668 /* At this point we want to restore the packet. When we return
1669 * here with NETDEV_TX_BUSY we will get another entrance in this
1670 * routine with the same skb and we need it to look the same.
1671 * So we pull 4 more bytes, then build the header again. */
1672 skb_pull(skb, 4);
1673 ether1394_header(skb, dev, ntohs(hdr_buf.h_proto),
1674 hdr_buf.h_dest, NULL, 0);
1675
Stefan Richter7a97bc02007-05-05 17:25:51 +02001676 /* Most failures of ether1394_send_packet are recoverable. */
1677 netif_stop_queue(dev);
1678 priv->wake_node = dest_node;
1679 schedule_work(&priv->wake);
1680 kmem_cache_free(packet_task_cache, ptask);
1681 return NETDEV_TX_BUSY;
1682 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683
Stefan Richterfdc00922007-04-02 02:24:27 +02001684 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001685fail:
1686 if (ptask)
1687 kmem_cache_free(packet_task_cache, ptask);
1688
1689 if (skb != NULL)
1690 dev_kfree_skb(skb);
1691
Stefan Richterefbeccf2007-04-02 02:12:32 +02001692 spin_lock_irqsave(&priv->lock, flags);
Stephen Hemminger92dc8cc2009-01-06 12:56:50 +00001693 dev->stats.tx_dropped++;
1694 dev->stats.tx_errors++;
Stefan Richterefbeccf2007-04-02 02:12:32 +02001695 spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696
Stefan Richterfdc00922007-04-02 02:24:27 +02001697 /*
1698 * FIXME: According to a patch from 2003-02-26, "returning non-zero
1699 * causes serious problems" here, allegedly. Before that patch,
1700 * -ERRNO was returned which is not appropriate under Linux 2.6.
1701 * Perhaps more needs to be done? Stop the queue in serious
1702 * conditions and restart it elsewhere?
1703 */
1704 /* return NETDEV_TX_BUSY; */
1705 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001706}
1707
Stefan Richterefbeccf2007-04-02 02:12:32 +02001708static void ether1394_get_drvinfo(struct net_device *dev,
1709 struct ethtool_drvinfo *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710{
Stefan Richterefbeccf2007-04-02 02:12:32 +02001711 strcpy(info->driver, driver_name);
1712 strcpy(info->bus_info, "ieee1394"); /* FIXME provide more detail? */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713}
1714
1715static struct ethtool_ops ethtool_ops = {
1716 .get_drvinfo = ether1394_get_drvinfo
1717};
1718
Akinobu Mita809e9052007-04-21 18:36:26 +09001719static int __init ether1394_init_module(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720{
Akinobu Mita809e9052007-04-21 18:36:26 +09001721 int err;
1722
Stefan Richterefbeccf2007-04-02 02:12:32 +02001723 packet_task_cache = kmem_cache_create("packet_task",
1724 sizeof(struct packet_task),
Paul Mundt20c2df82007-07-20 10:11:58 +09001725 0, 0, NULL);
Akinobu Mita809e9052007-04-21 18:36:26 +09001726 if (!packet_task_cache)
1727 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001728
Linus Torvalds1da177e2005-04-16 15:20:36 -07001729 hpsb_register_highlevel(&eth1394_highlevel);
Akinobu Mita809e9052007-04-21 18:36:26 +09001730 err = hpsb_register_protocol(&eth1394_proto_driver);
1731 if (err) {
1732 hpsb_unregister_highlevel(&eth1394_highlevel);
1733 kmem_cache_destroy(packet_task_cache);
1734 }
1735 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001736}
1737
Akinobu Mita809e9052007-04-21 18:36:26 +09001738static void __exit ether1394_exit_module(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001739{
1740 hpsb_unregister_protocol(&eth1394_proto_driver);
1741 hpsb_unregister_highlevel(&eth1394_highlevel);
1742 kmem_cache_destroy(packet_task_cache);
1743}
1744
1745module_init(ether1394_init_module);
1746module_exit(ether1394_exit_module);