]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Linux ARCnet driver - device-independent routines | |
cb334648 | 3 | * |
1da177e4 LT |
4 | * Written 1997 by David Woodhouse. |
5 | * Written 1994-1999 by Avery Pennarun. | |
6 | * Written 1999-2000 by Martin Mares <mj@ucw.cz>. | |
7 | * Derived from skeleton.c by Donald Becker. | |
8 | * | |
9 | * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com) | |
10 | * for sponsoring the further development of this driver. | |
11 | * | |
12 | * ********************** | |
13 | * | |
14 | * The original copyright was as follows: | |
15 | * | |
16 | * skeleton.c Written 1993 by Donald Becker. | |
17 | * Copyright 1993 United States Government as represented by the | |
18 | * Director, National Security Agency. This software may only be used | |
19 | * and distributed according to the terms of the GNU General Public License as | |
20 | * modified by SRC, incorporated herein by reference. | |
21 | * | |
22 | * ********************** | |
cb334648 | 23 | * |
1da177e4 LT |
24 | * The change log is now in a file called ChangeLog in this directory. |
25 | * | |
26 | * Sources: | |
27 | * - Crynwr arcnet.com/arcether.com packet drivers. | |
cb334648 | 28 | * - arcnet.c v0.00 dated 1/1/94 and apparently by |
1da177e4 LT |
29 | * Donald Becker - it didn't work :) |
30 | * - skeleton.c v0.05 dated 11/16/93 by Donald Becker | |
31 | * (from Linux Kernel 1.1.45) | |
32 | * - RFC's 1201 and 1051 - re: TCP/IP over ARCnet | |
33 | * - The official ARCnet COM9026 data sheets (!) thanks to | |
34 | * Ken Cornetet <kcornete@nyx10.cs.du.edu> | |
35 | * - The official ARCnet COM20020 data sheets. | |
36 | * - Information on some more obscure ARCnet controller chips, thanks | |
37 | * to the nice people at SMSC. | |
38 | * - net/inet/eth.c (from kernel 1.1.50) for header-building info. | |
39 | * - Alternate Linux ARCnet source by V.Shergin <vsher@sao.stavropol.su> | |
40 | * - Textual information and more alternate source from Joachim Koenig | |
41 | * <jojo@repas.de> | |
42 | */ | |
43 | ||
05a24b23 | 44 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
1da177e4 LT |
45 | |
46 | #include <linux/module.h> | |
1da177e4 LT |
47 | #include <linux/types.h> |
48 | #include <linux/delay.h> | |
49 | #include <linux/netdevice.h> | |
50 | #include <linux/if_arp.h> | |
51 | #include <net/arp.h> | |
52 | #include <linux/init.h> | |
ff5688ae | 53 | #include <linux/jiffies.h> |
1da177e4 | 54 | |
8890624a MG |
55 | #include <linux/leds.h> |
56 | ||
26c6d281 | 57 | #include "arcdevice.h" |
8e0f295e | 58 | #include "com9026.h" |
26c6d281 | 59 | |
1da177e4 LT |
60 | /* "do nothing" functions for protocol drivers */ |
61 | static void null_rx(struct net_device *dev, int bufnum, | |
62 | struct archdr *pkthdr, int length); | |
63 | static int null_build_header(struct sk_buff *skb, struct net_device *dev, | |
64 | unsigned short type, uint8_t daddr); | |
65 | static int null_prepare_tx(struct net_device *dev, struct archdr *pkt, | |
66 | int length, int bufnum); | |
67 | ||
f03aa2d8 | 68 | static void arcnet_rx(struct net_device *dev, int bufnum); |
1da177e4 | 69 | |
f2f0a16b | 70 | /* one ArcProto per possible proto ID. None of the elements of |
1da177e4 LT |
71 | * arc_proto_map are allowed to be NULL; they will get set to |
72 | * arc_proto_default instead. It also must not be NULL; if you would like | |
73 | * to set it to NULL, set it to &arc_proto_null instead. | |
74 | */ | |
811eafc0 JP |
75 | struct ArcProto *arc_proto_map[256]; |
76 | EXPORT_SYMBOL(arc_proto_map); | |
77 | ||
78 | struct ArcProto *arc_proto_default; | |
79 | EXPORT_SYMBOL(arc_proto_default); | |
80 | ||
81 | struct ArcProto *arc_bcast_proto; | |
82 | EXPORT_SYMBOL(arc_bcast_proto); | |
83 | ||
84 | struct ArcProto *arc_raw_proto; | |
85 | EXPORT_SYMBOL(arc_raw_proto); | |
1da177e4 | 86 | |
7f5e760c | 87 | static struct ArcProto arc_proto_null = { |
1da177e4 LT |
88 | .suffix = '?', |
89 | .mtu = XMTU, | |
90 | .is_ip = 0, | |
91 | .rx = null_rx, | |
92 | .build_header = null_build_header, | |
93 | .prepare_tx = null_prepare_tx, | |
94 | .continue_tx = NULL, | |
95 | .ack_tx = NULL | |
96 | }; | |
97 | ||
98 | /* Exported function prototypes */ | |
99 | int arcnet_debug = ARCNET_DEBUG; | |
1da177e4 | 100 | EXPORT_SYMBOL(arcnet_debug); |
1da177e4 LT |
101 | |
102 | /* Internal function prototypes */ | |
1da177e4 | 103 | static int arcnet_header(struct sk_buff *skb, struct net_device *dev, |
3b04ddde SH |
104 | unsigned short type, const void *daddr, |
105 | const void *saddr, unsigned len); | |
1da177e4 LT |
106 | static int go_tx(struct net_device *dev); |
107 | ||
108 | static int debug = ARCNET_DEBUG; | |
109 | module_param(debug, int, 0); | |
110 | MODULE_LICENSE("GPL"); | |
111 | ||
112 | static int __init arcnet_init(void) | |
113 | { | |
114 | int count; | |
115 | ||
116 | arcnet_debug = debug; | |
117 | ||
05a24b23 | 118 | pr_info("arcnet loaded\n"); |
1da177e4 LT |
119 | |
120 | /* initialize the protocol map */ | |
121 | arc_raw_proto = arc_proto_default = arc_bcast_proto = &arc_proto_null; | |
122 | for (count = 0; count < 256; count++) | |
123 | arc_proto_map[count] = arc_proto_default; | |
124 | ||
72aeea48 | 125 | if (BUGLVL(D_DURING)) |
5b5e0928 | 126 | pr_info("struct sizes: %zd %zd %zd %zd %zd\n", |
05a24b23 JP |
127 | sizeof(struct arc_hardware), |
128 | sizeof(struct arc_rfc1201), | |
129 | sizeof(struct arc_rfc1051), | |
130 | sizeof(struct arc_eth_encap), | |
131 | sizeof(struct archdr)); | |
1da177e4 LT |
132 | |
133 | return 0; | |
134 | } | |
135 | ||
136 | static void __exit arcnet_exit(void) | |
137 | { | |
138 | } | |
139 | ||
140 | module_init(arcnet_init); | |
141 | module_exit(arcnet_exit); | |
142 | ||
f2f0a16b | 143 | /* Dump the contents of an sk_buff */ |
1da177e4 LT |
144 | #if ARCNET_DEBUG_MAX & D_SKB |
145 | void arcnet_dump_skb(struct net_device *dev, | |
146 | struct sk_buff *skb, char *desc) | |
147 | { | |
ad361c98 | 148 | char hdr[32]; |
1da177e4 | 149 | |
ad361c98 JP |
150 | /* dump the packet */ |
151 | snprintf(hdr, sizeof(hdr), "%6s:%s skb->data:", dev->name, desc); | |
152 | print_hex_dump(KERN_DEBUG, hdr, DUMP_PREFIX_OFFSET, | |
153 | 16, 1, skb->data, skb->len, true); | |
1da177e4 | 154 | } |
1da177e4 LT |
155 | EXPORT_SYMBOL(arcnet_dump_skb); |
156 | #endif | |
157 | ||
f2f0a16b | 158 | /* Dump the contents of an ARCnet buffer */ |
1da177e4 | 159 | #if (ARCNET_DEBUG_MAX & (D_RX | D_TX)) |
f03aa2d8 AB |
160 | static void arcnet_dump_packet(struct net_device *dev, int bufnum, |
161 | char *desc, int take_arcnet_lock) | |
1da177e4 | 162 | { |
454d7c9b | 163 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
164 | int i, length; |
165 | unsigned long flags = 0; | |
166 | static uint8_t buf[512]; | |
ad361c98 | 167 | char hdr[32]; |
1da177e4 LT |
168 | |
169 | /* hw.copy_from_card expects IRQ context so take the IRQ lock | |
f2f0a16b JP |
170 | * to keep it single threaded |
171 | */ | |
cb334648 | 172 | if (take_arcnet_lock) |
1da177e4 LT |
173 | spin_lock_irqsave(&lp->lock, flags); |
174 | ||
175 | lp->hw.copy_from_card(dev, bufnum, 0, buf, 512); | |
cb334648 | 176 | if (take_arcnet_lock) |
1da177e4 LT |
177 | spin_unlock_irqrestore(&lp->lock, flags); |
178 | ||
179 | /* if the offset[0] byte is nonzero, this is a 256-byte packet */ | |
180 | length = (buf[2] ? 256 : 512); | |
181 | ||
ad361c98 JP |
182 | /* dump the packet */ |
183 | snprintf(hdr, sizeof(hdr), "%6s:%s packet dump:", dev->name, desc); | |
184 | print_hex_dump(KERN_DEBUG, hdr, DUMP_PREFIX_OFFSET, | |
185 | 16, 1, buf, length, true); | |
1da177e4 LT |
186 | } |
187 | ||
f03aa2d8 AB |
188 | #else |
189 | ||
cb334648 | 190 | #define arcnet_dump_packet(dev, bufnum, desc, take_arcnet_lock) do { } while (0) |
f03aa2d8 | 191 | |
1da177e4 LT |
192 | #endif |
193 | ||
8890624a MG |
194 | /* Trigger a LED event in response to a ARCNET device event */ |
195 | void arcnet_led_event(struct net_device *dev, enum arcnet_led_event event) | |
196 | { | |
197 | struct arcnet_local *lp = netdev_priv(dev); | |
198 | unsigned long led_delay = 350; | |
199 | unsigned long tx_delay = 50; | |
200 | ||
201 | switch (event) { | |
202 | case ARCNET_LED_EVENT_RECON: | |
203 | led_trigger_blink_oneshot(lp->recon_led_trig, | |
204 | &led_delay, &led_delay, 0); | |
205 | break; | |
206 | case ARCNET_LED_EVENT_OPEN: | |
207 | led_trigger_event(lp->tx_led_trig, LED_OFF); | |
208 | led_trigger_event(lp->recon_led_trig, LED_OFF); | |
209 | break; | |
210 | case ARCNET_LED_EVENT_STOP: | |
211 | led_trigger_event(lp->tx_led_trig, LED_OFF); | |
212 | led_trigger_event(lp->recon_led_trig, LED_OFF); | |
213 | break; | |
214 | case ARCNET_LED_EVENT_TX: | |
215 | led_trigger_blink_oneshot(lp->tx_led_trig, | |
216 | &tx_delay, &tx_delay, 0); | |
217 | break; | |
218 | } | |
219 | } | |
220 | EXPORT_SYMBOL_GPL(arcnet_led_event); | |
221 | ||
222 | static void arcnet_led_release(struct device *gendev, void *res) | |
223 | { | |
224 | struct arcnet_local *lp = netdev_priv(to_net_dev(gendev)); | |
225 | ||
226 | led_trigger_unregister_simple(lp->tx_led_trig); | |
227 | led_trigger_unregister_simple(lp->recon_led_trig); | |
228 | } | |
229 | ||
230 | /* Register ARCNET LED triggers for a arcnet device | |
231 | * | |
232 | * This is normally called from a driver's probe function | |
233 | */ | |
234 | void devm_arcnet_led_init(struct net_device *netdev, int index, int subid) | |
235 | { | |
236 | struct arcnet_local *lp = netdev_priv(netdev); | |
237 | void *res; | |
238 | ||
239 | res = devres_alloc(arcnet_led_release, 0, GFP_KERNEL); | |
240 | if (!res) { | |
241 | netdev_err(netdev, "cannot register LED triggers\n"); | |
242 | return; | |
243 | } | |
244 | ||
245 | snprintf(lp->tx_led_trig_name, sizeof(lp->tx_led_trig_name), | |
246 | "arc%d-%d-tx", index, subid); | |
247 | snprintf(lp->recon_led_trig_name, sizeof(lp->recon_led_trig_name), | |
248 | "arc%d-%d-recon", index, subid); | |
249 | ||
250 | led_trigger_register_simple(lp->tx_led_trig_name, | |
251 | &lp->tx_led_trig); | |
252 | led_trigger_register_simple(lp->recon_led_trig_name, | |
253 | &lp->recon_led_trig); | |
254 | ||
255 | devres_add(&netdev->dev, res); | |
256 | } | |
257 | EXPORT_SYMBOL_GPL(devm_arcnet_led_init); | |
258 | ||
f2f0a16b | 259 | /* Unregister a protocol driver from the arc_proto_map. Protocol drivers |
1da177e4 LT |
260 | * are responsible for registering themselves, but the unregister routine |
261 | * is pretty generic so we'll do it here. | |
262 | */ | |
263 | void arcnet_unregister_proto(struct ArcProto *proto) | |
264 | { | |
265 | int count; | |
266 | ||
267 | if (arc_proto_default == proto) | |
268 | arc_proto_default = &arc_proto_null; | |
269 | if (arc_bcast_proto == proto) | |
270 | arc_bcast_proto = arc_proto_default; | |
271 | if (arc_raw_proto == proto) | |
272 | arc_raw_proto = arc_proto_default; | |
273 | ||
274 | for (count = 0; count < 256; count++) { | |
275 | if (arc_proto_map[count] == proto) | |
276 | arc_proto_map[count] = arc_proto_default; | |
277 | } | |
278 | } | |
811eafc0 | 279 | EXPORT_SYMBOL(arcnet_unregister_proto); |
1da177e4 | 280 | |
f2f0a16b | 281 | /* Add a buffer to the queue. Only the interrupt handler is allowed to do |
1da177e4 | 282 | * this, unless interrupts are disabled. |
cb334648 | 283 | * |
1da177e4 LT |
284 | * Note: we don't check for a full queue, since there aren't enough buffers |
285 | * to more than fill it. | |
286 | */ | |
287 | static void release_arcbuf(struct net_device *dev, int bufnum) | |
288 | { | |
454d7c9b | 289 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
290 | int i; |
291 | ||
292 | lp->buf_queue[lp->first_free_buf++] = bufnum; | |
293 | lp->first_free_buf %= 5; | |
294 | ||
72aeea48 | 295 | if (BUGLVL(D_DURING)) { |
a34c0932 JP |
296 | arc_printk(D_DURING, dev, "release_arcbuf: freed #%d; buffer queue is now: ", |
297 | bufnum); | |
cb334648 | 298 | for (i = lp->next_buf; i != lp->first_free_buf; i = (i + 1) % 5) |
a34c0932 JP |
299 | arc_cont(D_DURING, "#%d ", lp->buf_queue[i]); |
300 | arc_cont(D_DURING, "\n"); | |
1da177e4 LT |
301 | } |
302 | } | |
303 | ||
f2f0a16b JP |
304 | /* Get a buffer from the queue. |
305 | * If this returns -1, there are no buffers available. | |
1da177e4 LT |
306 | */ |
307 | static int get_arcbuf(struct net_device *dev) | |
308 | { | |
454d7c9b | 309 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
310 | int buf = -1, i; |
311 | ||
312 | if (!atomic_dec_and_test(&lp->buf_lock)) { | |
313 | /* already in this function */ | |
a34c0932 JP |
314 | arc_printk(D_NORMAL, dev, "get_arcbuf: overlap (%d)!\n", |
315 | lp->buf_lock.counter); | |
7f5e760c | 316 | } else { /* we can continue */ |
1da177e4 LT |
317 | if (lp->next_buf >= 5) |
318 | lp->next_buf -= 5; | |
319 | ||
7f5e760c | 320 | if (lp->next_buf == lp->first_free_buf) { |
a34c0932 | 321 | arc_printk(D_NORMAL, dev, "get_arcbuf: BUG: no buffers are available??\n"); |
7f5e760c | 322 | } else { |
1da177e4 LT |
323 | buf = lp->buf_queue[lp->next_buf++]; |
324 | lp->next_buf %= 5; | |
325 | } | |
326 | } | |
327 | ||
72aeea48 | 328 | if (BUGLVL(D_DURING)) { |
a34c0932 JP |
329 | arc_printk(D_DURING, dev, "get_arcbuf: got #%d; buffer queue is now: ", |
330 | buf); | |
cb334648 | 331 | for (i = lp->next_buf; i != lp->first_free_buf; i = (i + 1) % 5) |
a34c0932 JP |
332 | arc_cont(D_DURING, "#%d ", lp->buf_queue[i]); |
333 | arc_cont(D_DURING, "\n"); | |
1da177e4 LT |
334 | } |
335 | ||
336 | atomic_inc(&lp->buf_lock); | |
337 | return buf; | |
338 | } | |
339 | ||
1da177e4 LT |
340 | static int choose_mtu(void) |
341 | { | |
342 | int count, mtu = 65535; | |
343 | ||
344 | /* choose the smallest MTU of all available encaps */ | |
345 | for (count = 0; count < 256; count++) { | |
8e95a202 JP |
346 | if (arc_proto_map[count] != &arc_proto_null && |
347 | arc_proto_map[count]->mtu < mtu) { | |
1da177e4 LT |
348 | mtu = arc_proto_map[count]->mtu; |
349 | } | |
350 | } | |
351 | ||
352 | return mtu == 65535 ? XMTU : mtu; | |
353 | } | |
354 | ||
3b04ddde SH |
355 | static const struct header_ops arcnet_header_ops = { |
356 | .create = arcnet_header, | |
3b04ddde SH |
357 | }; |
358 | ||
bca5b893 SH |
359 | static const struct net_device_ops arcnet_netdev_ops = { |
360 | .ndo_open = arcnet_open, | |
361 | .ndo_stop = arcnet_close, | |
362 | .ndo_start_xmit = arcnet_send_packet, | |
363 | .ndo_tx_timeout = arcnet_timeout, | |
364 | }; | |
1da177e4 LT |
365 | |
366 | /* Setup a struct device for ARCnet. */ | |
367 | static void arcdev_setup(struct net_device *dev) | |
368 | { | |
369 | dev->type = ARPHRD_ARCNET; | |
bca5b893 | 370 | dev->netdev_ops = &arcnet_netdev_ops; |
3b04ddde | 371 | dev->header_ops = &arcnet_header_ops; |
980137a2 | 372 | dev->hard_header_len = sizeof(struct arc_hardware); |
1da177e4 LT |
373 | dev->mtu = choose_mtu(); |
374 | ||
375 | dev->addr_len = ARCNET_ALEN; | |
376 | dev->tx_queue_len = 100; | |
377 | dev->broadcast[0] = 0x00; /* for us, broadcasts are address 0 */ | |
378 | dev->watchdog_timeo = TX_TIMEOUT; | |
379 | ||
380 | /* New-style flags. */ | |
381 | dev->flags = IFF_BROADCAST; | |
1da177e4 LT |
382 | } |
383 | ||
59fbcbc6 MG |
384 | static void arcnet_timer(unsigned long data) |
385 | { | |
386 | struct net_device *dev = (struct net_device *)data; | |
387 | ||
388 | if (!netif_carrier_ok(dev)) { | |
389 | netif_carrier_on(dev); | |
390 | netdev_info(dev, "link up\n"); | |
391 | } | |
392 | } | |
393 | ||
bca5b893 | 394 | struct net_device *alloc_arcdev(const char *name) |
1da177e4 LT |
395 | { |
396 | struct net_device *dev; | |
397 | ||
398 | dev = alloc_netdev(sizeof(struct arcnet_local), | |
c835a677 TG |
399 | name && *name ? name : "arc%d", NET_NAME_UNKNOWN, |
400 | arcdev_setup); | |
cb334648 | 401 | if (dev) { |
454d7c9b | 402 | struct arcnet_local *lp = netdev_priv(dev); |
01a1d5ac | 403 | |
1da177e4 | 404 | spin_lock_init(&lp->lock); |
59fbcbc6 MG |
405 | init_timer(&lp->timer); |
406 | lp->timer.data = (unsigned long) dev; | |
407 | lp->timer.function = arcnet_timer; | |
1da177e4 LT |
408 | } |
409 | ||
410 | return dev; | |
411 | } | |
811eafc0 | 412 | EXPORT_SYMBOL(alloc_arcdev); |
1da177e4 | 413 | |
f2f0a16b | 414 | /* Open/initialize the board. This is called sometime after booting when |
1da177e4 LT |
415 | * the 'ifconfig' program is run. |
416 | * | |
417 | * This routine should set everything up anew at each open, even registers | |
418 | * that "should" only need to be set once at boot, so that there is | |
419 | * non-reboot way to recover if something goes wrong. | |
420 | */ | |
bca5b893 | 421 | int arcnet_open(struct net_device *dev) |
1da177e4 | 422 | { |
454d7c9b | 423 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
424 | int count, newmtu, error; |
425 | ||
a34c0932 | 426 | arc_printk(D_INIT, dev, "opened."); |
1da177e4 LT |
427 | |
428 | if (!try_module_get(lp->hw.owner)) | |
429 | return -ENODEV; | |
430 | ||
72aeea48 | 431 | if (BUGLVL(D_PROTO)) { |
a34c0932 JP |
432 | arc_printk(D_PROTO, dev, "protocol map (default is '%c'): ", |
433 | arc_proto_default->suffix); | |
1da177e4 | 434 | for (count = 0; count < 256; count++) |
a34c0932 JP |
435 | arc_cont(D_PROTO, "%c", arc_proto_map[count]->suffix); |
436 | arc_cont(D_PROTO, "\n"); | |
1da177e4 LT |
437 | } |
438 | ||
a34c0932 | 439 | arc_printk(D_INIT, dev, "arcnet_open: resetting card.\n"); |
1da177e4 LT |
440 | |
441 | /* try to put the card in a defined state - if it fails the first | |
442 | * time, actually reset it. | |
443 | */ | |
444 | error = -ENODEV; | |
e15b0362 | 445 | if (lp->hw.reset(dev, 0) && lp->hw.reset(dev, 1)) |
1da177e4 LT |
446 | goto out_module_put; |
447 | ||
448 | newmtu = choose_mtu(); | |
449 | if (newmtu < dev->mtu) | |
450 | dev->mtu = newmtu; | |
451 | ||
a34c0932 | 452 | arc_printk(D_INIT, dev, "arcnet_open: mtu: %d.\n", dev->mtu); |
1da177e4 LT |
453 | |
454 | /* autodetect the encapsulation for each host. */ | |
455 | memset(lp->default_proto, 0, sizeof(lp->default_proto)); | |
456 | ||
457 | /* the broadcast address is special - use the 'bcast' protocol */ | |
458 | for (count = 0; count < 256; count++) { | |
459 | if (arc_proto_map[count] == arc_bcast_proto) { | |
460 | lp->default_proto[0] = count; | |
461 | break; | |
462 | } | |
463 | } | |
464 | ||
465 | /* initialize buffers */ | |
466 | atomic_set(&lp->buf_lock, 1); | |
467 | ||
468 | lp->next_buf = lp->first_free_buf = 0; | |
469 | release_arcbuf(dev, 0); | |
470 | release_arcbuf(dev, 1); | |
471 | release_arcbuf(dev, 2); | |
472 | release_arcbuf(dev, 3); | |
473 | lp->cur_tx = lp->next_tx = -1; | |
474 | lp->cur_rx = -1; | |
475 | ||
476 | lp->rfc1201.sequence = 1; | |
477 | ||
478 | /* bring up the hardware driver */ | |
479 | if (lp->hw.open) | |
480 | lp->hw.open(dev); | |
481 | ||
482 | if (dev->dev_addr[0] == 0) | |
a34c0932 | 483 | arc_printk(D_NORMAL, dev, "WARNING! Station address 00 is reserved for broadcasts!\n"); |
1da177e4 | 484 | else if (dev->dev_addr[0] == 255) |
a34c0932 | 485 | arc_printk(D_NORMAL, dev, "WARNING! Station address FF may confuse DOS networking programs!\n"); |
1da177e4 | 486 | |
a34c0932 | 487 | arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__); |
e15b0362 | 488 | if (lp->hw.status(dev) & RESETflag) { |
a34c0932 JP |
489 | arc_printk(D_DEBUG, dev, "%s: %d: %s\n", |
490 | __FILE__, __LINE__, __func__); | |
e15b0362 | 491 | lp->hw.command(dev, CFLAGScmd | RESETclear); |
1da177e4 LT |
492 | } |
493 | ||
a34c0932 | 494 | arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__); |
1da177e4 | 495 | /* make sure we're ready to receive IRQ's. */ |
e15b0362 | 496 | lp->hw.intmask(dev, 0); |
1da177e4 LT |
497 | udelay(1); /* give it time to set the mask before |
498 | * we reset it again. (may not even be | |
499 | * necessary) | |
500 | */ | |
a34c0932 | 501 | arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__); |
1da177e4 | 502 | lp->intmask = NORXflag | RECONflag; |
e15b0362 | 503 | lp->hw.intmask(dev, lp->intmask); |
a34c0932 | 504 | arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__); |
1da177e4 | 505 | |
59fbcbc6 | 506 | netif_carrier_off(dev); |
1da177e4 | 507 | netif_start_queue(dev); |
59fbcbc6 | 508 | mod_timer(&lp->timer, jiffies + msecs_to_jiffies(1000)); |
1da177e4 | 509 | |
8890624a | 510 | arcnet_led_event(dev, ARCNET_LED_EVENT_OPEN); |
1da177e4 LT |
511 | return 0; |
512 | ||
513 | out_module_put: | |
514 | module_put(lp->hw.owner); | |
515 | return error; | |
516 | } | |
811eafc0 | 517 | EXPORT_SYMBOL(arcnet_open); |
1da177e4 | 518 | |
1da177e4 | 519 | /* The inverse routine to arcnet_open - shuts down the card. */ |
bca5b893 | 520 | int arcnet_close(struct net_device *dev) |
1da177e4 | 521 | { |
454d7c9b | 522 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 | 523 | |
8890624a | 524 | arcnet_led_event(dev, ARCNET_LED_EVENT_STOP); |
59fbcbc6 MG |
525 | del_timer_sync(&lp->timer); |
526 | ||
1da177e4 | 527 | netif_stop_queue(dev); |
59fbcbc6 | 528 | netif_carrier_off(dev); |
1da177e4 LT |
529 | |
530 | /* flush TX and disable RX */ | |
e15b0362 JP |
531 | lp->hw.intmask(dev, 0); |
532 | lp->hw.command(dev, NOTXcmd); /* stop transmit */ | |
533 | lp->hw.command(dev, NORXcmd); /* disable receive */ | |
1da177e4 LT |
534 | mdelay(1); |
535 | ||
536 | /* shut down the card */ | |
537 | lp->hw.close(dev); | |
538 | module_put(lp->hw.owner); | |
539 | return 0; | |
540 | } | |
811eafc0 | 541 | EXPORT_SYMBOL(arcnet_close); |
1da177e4 | 542 | |
1da177e4 | 543 | static int arcnet_header(struct sk_buff *skb, struct net_device *dev, |
3b04ddde SH |
544 | unsigned short type, const void *daddr, |
545 | const void *saddr, unsigned len) | |
1da177e4 | 546 | { |
3b04ddde | 547 | const struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
548 | uint8_t _daddr, proto_num; |
549 | struct ArcProto *proto; | |
550 | ||
a34c0932 JP |
551 | arc_printk(D_DURING, dev, |
552 | "create header from %d to %d; protocol %d (%Xh); size %u.\n", | |
553 | saddr ? *(uint8_t *)saddr : -1, | |
554 | daddr ? *(uint8_t *)daddr : -1, | |
555 | type, type, len); | |
1da177e4 | 556 | |
cb334648 | 557 | if (skb->len != 0 && len != skb->len) |
a34c0932 JP |
558 | arc_printk(D_NORMAL, dev, "arcnet_header: Yikes! skb->len(%d) != len(%d)!\n", |
559 | skb->len, len); | |
1da177e4 | 560 | |
cb334648 JP |
561 | /* Type is host order - ? */ |
562 | if (type == ETH_P_ARCNET) { | |
563 | proto = arc_raw_proto; | |
a34c0932 JP |
564 | arc_printk(D_DEBUG, dev, "arc_raw_proto used. proto='%c'\n", |
565 | proto->suffix); | |
cb334648 | 566 | _daddr = daddr ? *(uint8_t *)daddr : 0; |
7f5e760c | 567 | } else if (!daddr) { |
f2f0a16b JP |
568 | /* if the dest addr isn't provided, we can't choose an |
569 | * encapsulation! Store the packet type (eg. ETH_P_IP) | |
570 | * for now, and we'll push on a real header when we do | |
571 | * rebuild_header. | |
1da177e4 | 572 | */ |
cb334648 | 573 | *(uint16_t *)skb_push(skb, 2) = type; |
f2f0a16b | 574 | /* XXX: Why not use skb->mac_len? */ |
b0e380b1 | 575 | if (skb->network_header - skb->mac_header != 2) |
a34c0932 JP |
576 | arc_printk(D_NORMAL, dev, "arcnet_header: Yikes! diff (%u) is not 2!\n", |
577 | skb->network_header - skb->mac_header); | |
1da177e4 | 578 | return -2; /* return error -- can't transmit yet! */ |
7f5e760c | 579 | } else { |
1da177e4 | 580 | /* otherwise, we can just add the header as usual. */ |
cb334648 | 581 | _daddr = *(uint8_t *)daddr; |
1da177e4 LT |
582 | proto_num = lp->default_proto[_daddr]; |
583 | proto = arc_proto_map[proto_num]; | |
a34c0932 JP |
584 | arc_printk(D_DURING, dev, "building header for %02Xh using protocol '%c'\n", |
585 | proto_num, proto->suffix); | |
1da177e4 | 586 | if (proto == &arc_proto_null && arc_bcast_proto != proto) { |
a34c0932 JP |
587 | arc_printk(D_DURING, dev, "actually, let's use '%c' instead.\n", |
588 | arc_bcast_proto->suffix); | |
1da177e4 LT |
589 | proto = arc_bcast_proto; |
590 | } | |
591 | } | |
592 | return proto->build_header(skb, dev, type, _daddr); | |
593 | } | |
594 | ||
1da177e4 | 595 | /* Called by the kernel in order to transmit a packet. */ |
61357325 | 596 | netdev_tx_t arcnet_send_packet(struct sk_buff *skb, |
cb334648 | 597 | struct net_device *dev) |
1da177e4 | 598 | { |
454d7c9b | 599 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
600 | struct archdr *pkt; |
601 | struct arc_rfc1201 *soft; | |
602 | struct ArcProto *proto; | |
603 | int txbuf; | |
604 | unsigned long flags; | |
b82de0e2 | 605 | int retval; |
1da177e4 | 606 | |
a34c0932 JP |
607 | arc_printk(D_DURING, dev, |
608 | "transmit requested (status=%Xh, txbufs=%d/%d, len=%d, protocol %x)\n", | |
e15b0362 | 609 | lp->hw.status(dev), lp->cur_tx, lp->next_tx, skb->len, skb->protocol); |
1da177e4 | 610 | |
cb334648 | 611 | pkt = (struct archdr *)skb->data; |
1da177e4 LT |
612 | soft = &pkt->soft.rfc1201; |
613 | proto = arc_proto_map[soft->proto]; | |
614 | ||
a34c0932 JP |
615 | arc_printk(D_SKB_SIZE, dev, "skb: transmitting %d bytes to %02X\n", |
616 | skb->len, pkt->hard.dest); | |
72aeea48 JP |
617 | if (BUGLVL(D_SKB)) |
618 | arcnet_dump_skb(dev, skb, "tx"); | |
1da177e4 LT |
619 | |
620 | /* fits in one packet? */ | |
621 | if (skb->len - ARC_HDR_SIZE > XMTU && !proto->continue_tx) { | |
a34c0932 | 622 | arc_printk(D_NORMAL, dev, "fixme: packet too large: compensating badly!\n"); |
1da177e4 | 623 | dev_kfree_skb(skb); |
c6bb15a0 | 624 | return NETDEV_TX_OK; /* don't try again */ |
1da177e4 LT |
625 | } |
626 | ||
627 | /* We're busy transmitting a packet... */ | |
628 | netif_stop_queue(dev); | |
629 | ||
630 | spin_lock_irqsave(&lp->lock, flags); | |
e15b0362 | 631 | lp->hw.intmask(dev, 0); |
cb334648 | 632 | if (lp->next_tx == -1) |
c6bb15a0 | 633 | txbuf = get_arcbuf(dev); |
7f5e760c | 634 | else |
c6bb15a0 | 635 | txbuf = -1; |
7f5e760c | 636 | |
1da177e4 LT |
637 | if (txbuf != -1) { |
638 | if (proto->prepare_tx(dev, pkt, skb->len, txbuf) && | |
639 | !proto->ack_tx) { | |
640 | /* done right away and we don't want to acknowledge | |
f2f0a16b JP |
641 | * the package later - forget about it now |
642 | */ | |
5803c512 | 643 | dev->stats.tx_bytes += skb->len; |
b82de0e2 | 644 | dev_kfree_skb(skb); |
1da177e4 LT |
645 | } else { |
646 | /* do it the 'split' way */ | |
647 | lp->outgoing.proto = proto; | |
648 | lp->outgoing.skb = skb; | |
649 | lp->outgoing.pkt = pkt; | |
650 | ||
651 | if (proto->continue_tx && | |
652 | proto->continue_tx(dev, txbuf)) { | |
a34c0932 JP |
653 | arc_printk(D_NORMAL, dev, |
654 | "bug! continue_tx finished the first time! (proto='%c')\n", | |
655 | proto->suffix); | |
1da177e4 LT |
656 | } |
657 | } | |
c6bb15a0 | 658 | retval = NETDEV_TX_OK; |
1da177e4 LT |
659 | lp->next_tx = txbuf; |
660 | } else { | |
c6bb15a0 | 661 | retval = NETDEV_TX_BUSY; |
1da177e4 LT |
662 | } |
663 | ||
a34c0932 | 664 | arc_printk(D_DEBUG, dev, "%s: %d: %s, status: %x\n", |
e15b0362 | 665 | __FILE__, __LINE__, __func__, lp->hw.status(dev)); |
1da177e4 | 666 | /* make sure we didn't ignore a TX IRQ while we were in here */ |
e15b0362 | 667 | lp->hw.intmask(dev, 0); |
1da177e4 | 668 | |
a34c0932 | 669 | arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__); |
cb334648 | 670 | lp->intmask |= TXFREEflag | EXCNAKflag; |
e15b0362 | 671 | lp->hw.intmask(dev, lp->intmask); |
a34c0932 | 672 | arc_printk(D_DEBUG, dev, "%s: %d: %s, status: %x\n", |
e15b0362 | 673 | __FILE__, __LINE__, __func__, lp->hw.status(dev)); |
1da177e4 | 674 | |
8890624a MG |
675 | arcnet_led_event(dev, ARCNET_LED_EVENT_TX); |
676 | ||
1da177e4 | 677 | spin_unlock_irqrestore(&lp->lock, flags); |
c6bb15a0 | 678 | return retval; /* no need to try again */ |
1da177e4 | 679 | } |
811eafc0 | 680 | EXPORT_SYMBOL(arcnet_send_packet); |
1da177e4 | 681 | |
f2f0a16b | 682 | /* Actually start transmitting a packet that was loaded into a buffer |
1da177e4 LT |
683 | * by prepare_tx. This should _only_ be called by the interrupt handler. |
684 | */ | |
685 | static int go_tx(struct net_device *dev) | |
686 | { | |
454d7c9b | 687 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 | 688 | |
a34c0932 | 689 | arc_printk(D_DURING, dev, "go_tx: status=%Xh, intmask=%Xh, next_tx=%d, cur_tx=%d\n", |
e15b0362 | 690 | lp->hw.status(dev), lp->intmask, lp->next_tx, lp->cur_tx); |
1da177e4 LT |
691 | |
692 | if (lp->cur_tx != -1 || lp->next_tx == -1) | |
693 | return 0; | |
694 | ||
72aeea48 JP |
695 | if (BUGLVL(D_TX)) |
696 | arcnet_dump_packet(dev, lp->next_tx, "go_tx", 0); | |
1da177e4 LT |
697 | |
698 | lp->cur_tx = lp->next_tx; | |
699 | lp->next_tx = -1; | |
700 | ||
701 | /* start sending */ | |
e15b0362 | 702 | lp->hw.command(dev, TXcmd | (lp->cur_tx << 3)); |
1da177e4 | 703 | |
5803c512 | 704 | dev->stats.tx_packets++; |
1da177e4 LT |
705 | lp->lasttrans_dest = lp->lastload_dest; |
706 | lp->lastload_dest = 0; | |
707 | lp->excnak_pending = 0; | |
cb334648 | 708 | lp->intmask |= TXFREEflag | EXCNAKflag; |
1da177e4 LT |
709 | |
710 | return 1; | |
711 | } | |
712 | ||
1da177e4 | 713 | /* Called by the kernel when transmit times out */ |
bca5b893 | 714 | void arcnet_timeout(struct net_device *dev) |
1da177e4 LT |
715 | { |
716 | unsigned long flags; | |
454d7c9b | 717 | struct arcnet_local *lp = netdev_priv(dev); |
e15b0362 | 718 | int status = lp->hw.status(dev); |
1da177e4 LT |
719 | char *msg; |
720 | ||
721 | spin_lock_irqsave(&lp->lock, flags); | |
722 | if (status & TXFREEflag) { /* transmit _DID_ finish */ | |
723 | msg = " - missed IRQ?"; | |
724 | } else { | |
725 | msg = ""; | |
5803c512 | 726 | dev->stats.tx_aborted_errors++; |
1da177e4 | 727 | lp->timed_out = 1; |
e15b0362 | 728 | lp->hw.command(dev, NOTXcmd | (lp->cur_tx << 3)); |
1da177e4 | 729 | } |
5803c512 | 730 | dev->stats.tx_errors++; |
1da177e4 LT |
731 | |
732 | /* make sure we didn't miss a TX or a EXC NAK IRQ */ | |
e15b0362 | 733 | lp->hw.intmask(dev, 0); |
cb334648 | 734 | lp->intmask |= TXFREEflag | EXCNAKflag; |
e15b0362 | 735 | lp->hw.intmask(dev, lp->intmask); |
cb334648 | 736 | |
1da177e4 LT |
737 | spin_unlock_irqrestore(&lp->lock, flags); |
738 | ||
cb334648 | 739 | if (time_after(jiffies, lp->last_timeout + 10 * HZ)) { |
a34c0932 JP |
740 | arc_printk(D_EXTRA, dev, "tx timed out%s (status=%Xh, intmask=%Xh, dest=%02Xh)\n", |
741 | msg, status, lp->intmask, lp->lasttrans_dest); | |
1da177e4 LT |
742 | lp->last_timeout = jiffies; |
743 | } | |
744 | ||
745 | if (lp->cur_tx == -1) | |
746 | netif_wake_queue(dev); | |
747 | } | |
811eafc0 | 748 | EXPORT_SYMBOL(arcnet_timeout); |
1da177e4 | 749 | |
f2f0a16b | 750 | /* The typical workload of the driver: Handle the network interface |
1da177e4 LT |
751 | * interrupts. Establish which device needs attention, and call the correct |
752 | * chipset interrupt handler. | |
753 | */ | |
7d12e780 | 754 | irqreturn_t arcnet_interrupt(int irq, void *dev_id) |
1da177e4 LT |
755 | { |
756 | struct net_device *dev = dev_id; | |
757 | struct arcnet_local *lp; | |
758 | int recbuf, status, diagstatus, didsomething, boguscount; | |
759 | int retval = IRQ_NONE; | |
760 | ||
a34c0932 | 761 | arc_printk(D_DURING, dev, "\n"); |
1da177e4 | 762 | |
a34c0932 | 763 | arc_printk(D_DURING, dev, "in arcnet_interrupt\n"); |
454d7c9b WC |
764 | |
765 | lp = netdev_priv(dev); | |
5d9428de | 766 | BUG_ON(!lp); |
cb334648 | 767 | |
1da177e4 LT |
768 | spin_lock(&lp->lock); |
769 | ||
f2f0a16b JP |
770 | /* RESET flag was enabled - if device is not running, we must |
771 | * clear it right away (but nothing else). | |
1da177e4 LT |
772 | */ |
773 | if (!netif_running(dev)) { | |
e15b0362 JP |
774 | if (lp->hw.status(dev) & RESETflag) |
775 | lp->hw.command(dev, CFLAGScmd | RESETclear); | |
776 | lp->hw.intmask(dev, 0); | |
1da177e4 | 777 | spin_unlock(&lp->lock); |
226ee675 | 778 | return retval; |
1da177e4 LT |
779 | } |
780 | ||
a34c0932 | 781 | arc_printk(D_DURING, dev, "in arcnet_inthandler (status=%Xh, intmask=%Xh)\n", |
e15b0362 | 782 | lp->hw.status(dev), lp->intmask); |
1da177e4 LT |
783 | |
784 | boguscount = 5; | |
785 | do { | |
e15b0362 | 786 | status = lp->hw.status(dev); |
cb334648 | 787 | diagstatus = (status >> 8) & 0xFF; |
1da177e4 | 788 | |
a34c0932 JP |
789 | arc_printk(D_DEBUG, dev, "%s: %d: %s: status=%x\n", |
790 | __FILE__, __LINE__, __func__, status); | |
1da177e4 LT |
791 | didsomething = 0; |
792 | ||
f2f0a16b | 793 | /* RESET flag was enabled - card is resetting and if RX is |
1da177e4 | 794 | * disabled, it's NOT because we just got a packet. |
cb334648 | 795 | * |
f2f0a16b JP |
796 | * The card is in an undefined state. |
797 | * Clear it out and start over. | |
1da177e4 LT |
798 | */ |
799 | if (status & RESETflag) { | |
a34c0932 JP |
800 | arc_printk(D_NORMAL, dev, "spurious reset (status=%Xh)\n", |
801 | status); | |
1da177e4 LT |
802 | arcnet_close(dev); |
803 | arcnet_open(dev); | |
804 | ||
805 | /* get out of the interrupt handler! */ | |
806 | break; | |
807 | } | |
f2f0a16b JP |
808 | /* RX is inhibited - we must have received something. |
809 | * Prepare to receive into the next buffer. | |
cb334648 | 810 | * |
f2f0a16b JP |
811 | * We don't actually copy the received packet from the card |
812 | * until after the transmit handler runs (and possibly | |
813 | * launches the next tx); this should improve latency slightly | |
814 | * if we get both types of interrupts at once. | |
1da177e4 LT |
815 | */ |
816 | recbuf = -1; | |
817 | if (status & lp->intmask & NORXflag) { | |
818 | recbuf = lp->cur_rx; | |
a34c0932 JP |
819 | arc_printk(D_DURING, dev, "Buffer #%d: receive irq (status=%Xh)\n", |
820 | recbuf, status); | |
1da177e4 LT |
821 | |
822 | lp->cur_rx = get_arcbuf(dev); | |
823 | if (lp->cur_rx != -1) { | |
a34c0932 JP |
824 | arc_printk(D_DURING, dev, "enabling receive to buffer #%d\n", |
825 | lp->cur_rx); | |
e15b0362 | 826 | lp->hw.command(dev, RXcmd | (lp->cur_rx << 3) | RXbcasts); |
1da177e4 LT |
827 | } |
828 | didsomething++; | |
829 | } | |
830 | ||
cb334648 | 831 | if ((diagstatus & EXCNAKflag)) { |
a34c0932 JP |
832 | arc_printk(D_DURING, dev, "EXCNAK IRQ (diagstat=%Xh)\n", |
833 | diagstatus); | |
1da177e4 | 834 | |
e15b0362 | 835 | lp->hw.command(dev, NOTXcmd); /* disable transmit */ |
cb334648 | 836 | lp->excnak_pending = 1; |
1da177e4 | 837 | |
e15b0362 | 838 | lp->hw.command(dev, EXCNAKclear); |
1da177e4 | 839 | lp->intmask &= ~(EXCNAKflag); |
cb334648 JP |
840 | didsomething++; |
841 | } | |
1da177e4 | 842 | |
1da177e4 LT |
843 | /* a transmit finished, and we're interested in it. */ |
844 | if ((status & lp->intmask & TXFREEflag) || lp->timed_out) { | |
cb334648 | 845 | lp->intmask &= ~(TXFREEflag | EXCNAKflag); |
1da177e4 | 846 | |
d6d7d3ed JP |
847 | arc_printk(D_DURING, dev, "TX IRQ (stat=%Xh)\n", |
848 | status); | |
1da177e4 LT |
849 | |
850 | if (lp->cur_tx != -1 && !lp->timed_out) { | |
cb334648 | 851 | if (!(status & TXACKflag)) { |
1da177e4 | 852 | if (lp->lasttrans_dest != 0) { |
a34c0932 JP |
853 | arc_printk(D_EXTRA, dev, |
854 | "transmit was not acknowledged! (status=%Xh, dest=%02Xh)\n", | |
855 | status, | |
856 | lp->lasttrans_dest); | |
5803c512 SH |
857 | dev->stats.tx_errors++; |
858 | dev->stats.tx_carrier_errors++; | |
1da177e4 | 859 | } else { |
a34c0932 JP |
860 | arc_printk(D_DURING, dev, |
861 | "broadcast was not acknowledged; that's normal (status=%Xh, dest=%02Xh)\n", | |
862 | status, | |
863 | lp->lasttrans_dest); | |
1da177e4 LT |
864 | } |
865 | } | |
866 | ||
867 | if (lp->outgoing.proto && | |
868 | lp->outgoing.proto->ack_tx) { | |
cb334648 | 869 | int ackstatus; |
01a1d5ac | 870 | |
cb334648 JP |
871 | if (status & TXACKflag) |
872 | ackstatus = 2; | |
873 | else if (lp->excnak_pending) | |
874 | ackstatus = 1; | |
875 | else | |
876 | ackstatus = 0; | |
877 | ||
878 | lp->outgoing.proto | |
879 | ->ack_tx(dev, ackstatus); | |
1da177e4 LT |
880 | } |
881 | } | |
882 | if (lp->cur_tx != -1) | |
883 | release_arcbuf(dev, lp->cur_tx); | |
884 | ||
885 | lp->cur_tx = -1; | |
886 | lp->timed_out = 0; | |
887 | didsomething++; | |
888 | ||
889 | /* send another packet if there is one */ | |
890 | go_tx(dev); | |
891 | ||
892 | /* continue a split packet, if any */ | |
d6d7d3ed JP |
893 | if (lp->outgoing.proto && |
894 | lp->outgoing.proto->continue_tx) { | |
1da177e4 | 895 | int txbuf = get_arcbuf(dev); |
01a1d5ac | 896 | |
1da177e4 LT |
897 | if (txbuf != -1) { |
898 | if (lp->outgoing.proto->continue_tx(dev, txbuf)) { | |
899 | /* that was the last segment */ | |
5803c512 | 900 | dev->stats.tx_bytes += lp->outgoing.skb->len; |
7f5e760c | 901 | if (!lp->outgoing.proto->ack_tx) { |
cb334648 JP |
902 | dev_kfree_skb_irq(lp->outgoing.skb); |
903 | lp->outgoing.proto = NULL; | |
904 | } | |
1da177e4 LT |
905 | } |
906 | lp->next_tx = txbuf; | |
907 | } | |
908 | } | |
909 | /* inform upper layers of idleness, if necessary */ | |
910 | if (lp->cur_tx == -1) | |
911 | netif_wake_queue(dev); | |
912 | } | |
913 | /* now process the received packet, if any */ | |
914 | if (recbuf != -1) { | |
72aeea48 JP |
915 | if (BUGLVL(D_RX)) |
916 | arcnet_dump_packet(dev, recbuf, "rx irq", 0); | |
1da177e4 LT |
917 | |
918 | arcnet_rx(dev, recbuf); | |
919 | release_arcbuf(dev, recbuf); | |
920 | ||
921 | didsomething++; | |
922 | } | |
923 | if (status & lp->intmask & RECONflag) { | |
e15b0362 | 924 | lp->hw.command(dev, CFLAGScmd | CONFIGclear); |
5803c512 | 925 | dev->stats.tx_carrier_errors++; |
1da177e4 | 926 | |
a34c0932 JP |
927 | arc_printk(D_RECON, dev, "Network reconfiguration detected (status=%Xh)\n", |
928 | status); | |
59fbcbc6 MG |
929 | if (netif_carrier_ok(dev)) { |
930 | netif_carrier_off(dev); | |
931 | netdev_info(dev, "link down\n"); | |
932 | } | |
933 | mod_timer(&lp->timer, jiffies + msecs_to_jiffies(1000)); | |
934 | ||
8890624a | 935 | arcnet_led_event(dev, ARCNET_LED_EVENT_RECON); |
c6bb15a0 | 936 | /* MYRECON bit is at bit 7 of diagstatus */ |
cb334648 | 937 | if (diagstatus & 0x80) |
a34c0932 | 938 | arc_printk(D_RECON, dev, "Put out that recon myself\n"); |
1da177e4 LT |
939 | |
940 | /* is the RECON info empty or old? */ | |
941 | if (!lp->first_recon || !lp->last_recon || | |
9307b570 | 942 | time_after(jiffies, lp->last_recon + HZ * 10)) { |
1da177e4 | 943 | if (lp->network_down) |
a34c0932 | 944 | arc_printk(D_NORMAL, dev, "reconfiguration detected: cabling restored?\n"); |
1da177e4 LT |
945 | lp->first_recon = lp->last_recon = jiffies; |
946 | lp->num_recons = lp->network_down = 0; | |
947 | ||
a34c0932 | 948 | arc_printk(D_DURING, dev, "recon: clearing counters.\n"); |
1da177e4 LT |
949 | } else { /* add to current RECON counter */ |
950 | lp->last_recon = jiffies; | |
951 | lp->num_recons++; | |
952 | ||
a34c0932 JP |
953 | arc_printk(D_DURING, dev, "recon: counter=%d, time=%lds, net=%d\n", |
954 | lp->num_recons, | |
955 | (lp->last_recon - lp->first_recon) / HZ, | |
956 | lp->network_down); | |
1da177e4 LT |
957 | |
958 | /* if network is marked up; | |
959 | * and first_recon and last_recon are 60+ apart; | |
960 | * and the average no. of recons counted is | |
961 | * > RECON_THRESHOLD/min; | |
962 | * then print a warning message. | |
963 | */ | |
8e95a202 JP |
964 | if (!lp->network_down && |
965 | (lp->last_recon - lp->first_recon) <= HZ * 60 && | |
966 | lp->num_recons >= RECON_THRESHOLD) { | |
1da177e4 | 967 | lp->network_down = 1; |
a34c0932 | 968 | arc_printk(D_NORMAL, dev, "many reconfigurations detected: cabling problem?\n"); |
8e95a202 JP |
969 | } else if (!lp->network_down && |
970 | lp->last_recon - lp->first_recon > HZ * 60) { | |
d6d7d3ed JP |
971 | /* reset counters if we've gone for |
972 | * over a minute. | |
973 | */ | |
1da177e4 LT |
974 | lp->first_recon = lp->last_recon; |
975 | lp->num_recons = 1; | |
976 | } | |
977 | } | |
9307b570 | 978 | } else if (lp->network_down && |
cb334648 | 979 | time_after(jiffies, lp->last_recon + HZ * 10)) { |
1da177e4 | 980 | if (lp->network_down) |
a34c0932 | 981 | arc_printk(D_NORMAL, dev, "cabling restored?\n"); |
1da177e4 LT |
982 | lp->first_recon = lp->last_recon = 0; |
983 | lp->num_recons = lp->network_down = 0; | |
984 | ||
a34c0932 | 985 | arc_printk(D_DURING, dev, "not recon: clearing counters anyway.\n"); |
59fbcbc6 | 986 | netif_carrier_on(dev); |
1da177e4 LT |
987 | } |
988 | ||
7f5e760c | 989 | if (didsomething) |
1da177e4 | 990 | retval |= IRQ_HANDLED; |
7f5e760c | 991 | } while (--boguscount && didsomething); |
1da177e4 | 992 | |
a34c0932 | 993 | arc_printk(D_DURING, dev, "arcnet_interrupt complete (status=%Xh, count=%d)\n", |
e15b0362 | 994 | lp->hw.status(dev), boguscount); |
a34c0932 | 995 | arc_printk(D_DURING, dev, "\n"); |
1da177e4 | 996 | |
e15b0362 | 997 | lp->hw.intmask(dev, 0); |
1da177e4 | 998 | udelay(1); |
e15b0362 | 999 | lp->hw.intmask(dev, lp->intmask); |
cb334648 | 1000 | |
1da177e4 LT |
1001 | spin_unlock(&lp->lock); |
1002 | return retval; | |
1003 | } | |
811eafc0 | 1004 | EXPORT_SYMBOL(arcnet_interrupt); |
1da177e4 | 1005 | |
f2f0a16b | 1006 | /* This is a generic packet receiver that calls arcnet??_rx depending on the |
1da177e4 LT |
1007 | * protocol ID found. |
1008 | */ | |
f03aa2d8 | 1009 | static void arcnet_rx(struct net_device *dev, int bufnum) |
1da177e4 | 1010 | { |
454d7c9b | 1011 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
1012 | struct archdr pkt; |
1013 | struct arc_rfc1201 *soft; | |
1014 | int length, ofs; | |
1015 | ||
1016 | soft = &pkt.soft.rfc1201; | |
1017 | ||
087d273c | 1018 | lp->hw.copy_from_card(dev, bufnum, 0, &pkt, ARC_HDR_SIZE); |
1da177e4 LT |
1019 | if (pkt.hard.offset[0]) { |
1020 | ofs = pkt.hard.offset[0]; | |
1021 | length = 256 - ofs; | |
1022 | } else { | |
1023 | ofs = pkt.hard.offset[1]; | |
1024 | length = 512 - ofs; | |
1025 | } | |
1026 | ||
1027 | /* get the full header, if possible */ | |
7f5e760c | 1028 | if (sizeof(pkt.soft) <= length) { |
1da177e4 | 1029 | lp->hw.copy_from_card(dev, bufnum, ofs, soft, sizeof(pkt.soft)); |
7f5e760c | 1030 | } else { |
1da177e4 LT |
1031 | memset(&pkt.soft, 0, sizeof(pkt.soft)); |
1032 | lp->hw.copy_from_card(dev, bufnum, ofs, soft, length); | |
1033 | } | |
1034 | ||
a34c0932 JP |
1035 | arc_printk(D_DURING, dev, "Buffer #%d: received packet from %02Xh to %02Xh (%d+4 bytes)\n", |
1036 | bufnum, pkt.hard.source, pkt.hard.dest, length); | |
1da177e4 | 1037 | |
5803c512 SH |
1038 | dev->stats.rx_packets++; |
1039 | dev->stats.rx_bytes += length + ARC_HDR_SIZE; | |
1da177e4 LT |
1040 | |
1041 | /* call the right receiver for the protocol */ | |
1042 | if (arc_proto_map[soft->proto]->is_ip) { | |
72aeea48 | 1043 | if (BUGLVL(D_PROTO)) { |
1da177e4 LT |
1044 | struct ArcProto |
1045 | *oldp = arc_proto_map[lp->default_proto[pkt.hard.source]], | |
1046 | *newp = arc_proto_map[soft->proto]; | |
1047 | ||
1048 | if (oldp != newp) { | |
a34c0932 JP |
1049 | arc_printk(D_PROTO, dev, |
1050 | "got protocol %02Xh; encap for host %02Xh is now '%c' (was '%c')\n", | |
1051 | soft->proto, pkt.hard.source, | |
1052 | newp->suffix, oldp->suffix); | |
1da177e4 LT |
1053 | } |
1054 | } | |
1055 | ||
1056 | /* broadcasts will always be done with the last-used encap. */ | |
1057 | lp->default_proto[0] = soft->proto; | |
1058 | ||
1059 | /* in striking contrast, the following isn't a hack. */ | |
1060 | lp->default_proto[pkt.hard.source] = soft->proto; | |
1061 | } | |
1062 | /* call the protocol-specific receiver. */ | |
1063 | arc_proto_map[soft->proto]->rx(dev, bufnum, &pkt, length); | |
1064 | } | |
1065 | ||
1da177e4 LT |
1066 | static void null_rx(struct net_device *dev, int bufnum, |
1067 | struct archdr *pkthdr, int length) | |
1068 | { | |
a34c0932 JP |
1069 | arc_printk(D_PROTO, dev, |
1070 | "rx: don't know how to deal with proto %02Xh from host %02Xh.\n", | |
1071 | pkthdr->soft.rfc1201.proto, pkthdr->hard.source); | |
1da177e4 LT |
1072 | } |
1073 | ||
1da177e4 LT |
1074 | static int null_build_header(struct sk_buff *skb, struct net_device *dev, |
1075 | unsigned short type, uint8_t daddr) | |
1076 | { | |
454d7c9b | 1077 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 | 1078 | |
a34c0932 JP |
1079 | arc_printk(D_PROTO, dev, |
1080 | "tx: can't build header for encap %02Xh; load a protocol driver.\n", | |
1081 | lp->default_proto[daddr]); | |
1da177e4 LT |
1082 | |
1083 | /* always fails */ | |
1084 | return 0; | |
1085 | } | |
1086 | ||
1da177e4 LT |
1087 | /* the "do nothing" prepare_tx function warns that there's nothing to do. */ |
1088 | static int null_prepare_tx(struct net_device *dev, struct archdr *pkt, | |
1089 | int length, int bufnum) | |
1090 | { | |
454d7c9b | 1091 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
1092 | struct arc_hardware newpkt; |
1093 | ||
a34c0932 | 1094 | arc_printk(D_PROTO, dev, "tx: no encap for this host; load a protocol driver.\n"); |
1da177e4 LT |
1095 | |
1096 | /* send a packet to myself -- will never get received, of course */ | |
1097 | newpkt.source = newpkt.dest = dev->dev_addr[0]; | |
1098 | ||
1099 | /* only one byte of actual data (and it's random) */ | |
1100 | newpkt.offset[0] = 0xFF; | |
1101 | ||
1102 | lp->hw.copy_to_card(dev, bufnum, 0, &newpkt, ARC_HDR_SIZE); | |
1103 | ||
1104 | return 1; /* done */ | |
1105 | } |