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1da177e4 LT |
1 | /* |
2 | * linux/drivers/s390/net/lcs.c | |
3 | * | |
4 | * Linux for S/390 Lan Channel Station Network Driver | |
5 | * | |
6 | * Copyright (C) 1999-2001 IBM Deutschland Entwicklung GmbH, | |
7 | * IBM Corporation | |
8 | * Author(s): Original Code written by | |
9 | * DJ Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) | |
10 | * Rewritten by | |
1387780f | 11 | * Frank Pavlic (fpavlic@de.ibm.com) and |
1da177e4 LT |
12 | * Martin Schwidefsky <schwidefsky@de.ibm.com> |
13 | * | |
1da177e4 LT |
14 | * This program is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU General Public License as published by | |
16 | * the Free Software Foundation; either version 2, or (at your option) | |
17 | * any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License | |
25 | * along with this program; if not, write to the Free Software | |
26 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
27 | */ | |
28 | ||
29 | #include <linux/module.h> | |
30 | #include <linux/if.h> | |
31 | #include <linux/netdevice.h> | |
32 | #include <linux/etherdevice.h> | |
33 | #include <linux/trdevice.h> | |
34 | #include <linux/fddidevice.h> | |
35 | #include <linux/inetdevice.h> | |
36 | #include <linux/in.h> | |
37 | #include <linux/igmp.h> | |
38 | #include <linux/delay.h> | |
39 | #include <net/arp.h> | |
40 | #include <net/ip.h> | |
41 | ||
42 | #include <asm/debug.h> | |
43 | #include <asm/idals.h> | |
44 | #include <asm/timex.h> | |
45 | #include <linux/device.h> | |
46 | #include <asm/ccwgroup.h> | |
47 | ||
48 | #include "lcs.h" | |
49 | #include "cu3088.h" | |
50 | ||
51 | ||
52 | #if !defined(CONFIG_NET_ETHERNET) && \ | |
53 | !defined(CONFIG_TR) && !defined(CONFIG_FDDI) | |
54 | #error Cannot compile lcs.c without some net devices switched on. | |
55 | #endif | |
56 | ||
57 | /** | |
58 | * initialization string for output | |
59 | */ | |
1da177e4 | 60 | |
e018ba1f | 61 | static char version[] __initdata = "LCS driver"; |
1da177e4 LT |
62 | static char debug_buffer[255]; |
63 | ||
64 | /** | |
65 | * Some prototypes. | |
66 | */ | |
67 | static void lcs_tasklet(unsigned long); | |
68 | static void lcs_start_kernel_thread(struct lcs_card *card); | |
69 | static void lcs_get_frames_cb(struct lcs_channel *, struct lcs_buffer *); | |
70 | static int lcs_send_delipm(struct lcs_card *, struct lcs_ipm_list *); | |
27eb5ac8 | 71 | static int lcs_recovery(void *ptr); |
1da177e4 LT |
72 | |
73 | /** | |
74 | * Debug Facility Stuff | |
75 | */ | |
76 | static debug_info_t *lcs_dbf_setup; | |
77 | static debug_info_t *lcs_dbf_trace; | |
78 | ||
79 | /** | |
80 | * LCS Debug Facility functions | |
81 | */ | |
82 | static void | |
83 | lcs_unregister_debug_facility(void) | |
84 | { | |
85 | if (lcs_dbf_setup) | |
86 | debug_unregister(lcs_dbf_setup); | |
87 | if (lcs_dbf_trace) | |
88 | debug_unregister(lcs_dbf_trace); | |
89 | } | |
90 | ||
91 | static int | |
92 | lcs_register_debug_facility(void) | |
93 | { | |
66a464db MH |
94 | lcs_dbf_setup = debug_register("lcs_setup", 2, 1, 8); |
95 | lcs_dbf_trace = debug_register("lcs_trace", 2, 2, 8); | |
1da177e4 LT |
96 | if (lcs_dbf_setup == NULL || lcs_dbf_trace == NULL) { |
97 | PRINT_ERR("Not enough memory for debug facility.\n"); | |
98 | lcs_unregister_debug_facility(); | |
99 | return -ENOMEM; | |
100 | } | |
101 | debug_register_view(lcs_dbf_setup, &debug_hex_ascii_view); | |
0d613a27 | 102 | debug_set_level(lcs_dbf_setup, 2); |
1da177e4 | 103 | debug_register_view(lcs_dbf_trace, &debug_hex_ascii_view); |
0d613a27 | 104 | debug_set_level(lcs_dbf_trace, 2); |
1da177e4 LT |
105 | return 0; |
106 | } | |
107 | ||
108 | /** | |
109 | * Allocate io buffers. | |
110 | */ | |
111 | static int | |
112 | lcs_alloc_channel(struct lcs_channel *channel) | |
113 | { | |
114 | int cnt; | |
115 | ||
116 | LCS_DBF_TEXT(2, setup, "ichalloc"); | |
117 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
118 | /* alloc memory fo iobuffer */ | |
88abaab4 ES |
119 | channel->iob[cnt].data = |
120 | kzalloc(LCS_IOBUFFERSIZE, GFP_DMA | GFP_KERNEL); | |
1da177e4 LT |
121 | if (channel->iob[cnt].data == NULL) |
122 | break; | |
1da177e4 LT |
123 | channel->iob[cnt].state = BUF_STATE_EMPTY; |
124 | } | |
125 | if (cnt < LCS_NUM_BUFFS) { | |
126 | /* Not all io buffers could be allocated. */ | |
127 | LCS_DBF_TEXT(2, setup, "echalloc"); | |
128 | while (cnt-- > 0) | |
129 | kfree(channel->iob[cnt].data); | |
130 | return -ENOMEM; | |
131 | } | |
132 | return 0; | |
133 | } | |
134 | ||
135 | /** | |
136 | * Free io buffers. | |
137 | */ | |
138 | static void | |
139 | lcs_free_channel(struct lcs_channel *channel) | |
140 | { | |
141 | int cnt; | |
142 | ||
143 | LCS_DBF_TEXT(2, setup, "ichfree"); | |
144 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
17fd682e | 145 | kfree(channel->iob[cnt].data); |
1da177e4 LT |
146 | channel->iob[cnt].data = NULL; |
147 | } | |
148 | } | |
149 | ||
150 | /* | |
151 | * Cleanup channel. | |
152 | */ | |
153 | static void | |
154 | lcs_cleanup_channel(struct lcs_channel *channel) | |
155 | { | |
156 | LCS_DBF_TEXT(3, setup, "cleanch"); | |
157 | /* Kill write channel tasklets. */ | |
158 | tasklet_kill(&channel->irq_tasklet); | |
159 | /* Free channel buffers. */ | |
160 | lcs_free_channel(channel); | |
161 | } | |
162 | ||
163 | /** | |
164 | * LCS free memory for card and channels. | |
165 | */ | |
166 | static void | |
167 | lcs_free_card(struct lcs_card *card) | |
168 | { | |
169 | LCS_DBF_TEXT(2, setup, "remcard"); | |
170 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
171 | kfree(card); | |
172 | } | |
173 | ||
174 | /** | |
175 | * LCS alloc memory for card and channels | |
176 | */ | |
177 | static struct lcs_card * | |
178 | lcs_alloc_card(void) | |
179 | { | |
180 | struct lcs_card *card; | |
181 | int rc; | |
182 | ||
183 | LCS_DBF_TEXT(2, setup, "alloclcs"); | |
184 | ||
88abaab4 | 185 | card = kzalloc(sizeof(struct lcs_card), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
186 | if (card == NULL) |
187 | return NULL; | |
1da177e4 LT |
188 | card->lan_type = LCS_FRAME_TYPE_AUTO; |
189 | card->pkt_seq = 0; | |
190 | card->lancmd_timeout = LCS_LANCMD_TIMEOUT_DEFAULT; | |
191 | /* Allocate io buffers for the read channel. */ | |
192 | rc = lcs_alloc_channel(&card->read); | |
193 | if (rc){ | |
194 | LCS_DBF_TEXT(2, setup, "iccwerr"); | |
195 | lcs_free_card(card); | |
196 | return NULL; | |
197 | } | |
198 | /* Allocate io buffers for the write channel. */ | |
199 | rc = lcs_alloc_channel(&card->write); | |
200 | if (rc) { | |
201 | LCS_DBF_TEXT(2, setup, "iccwerr"); | |
202 | lcs_cleanup_channel(&card->read); | |
203 | lcs_free_card(card); | |
204 | return NULL; | |
205 | } | |
206 | ||
207 | #ifdef CONFIG_IP_MULTICAST | |
208 | INIT_LIST_HEAD(&card->ipm_list); | |
209 | #endif | |
210 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
211 | return card; | |
212 | } | |
213 | ||
214 | /* | |
215 | * Setup read channel. | |
216 | */ | |
217 | static void | |
218 | lcs_setup_read_ccws(struct lcs_card *card) | |
219 | { | |
220 | int cnt; | |
221 | ||
222 | LCS_DBF_TEXT(2, setup, "ireadccw"); | |
223 | /* Setup read ccws. */ | |
224 | memset(card->read.ccws, 0, sizeof (struct ccw1) * (LCS_NUM_BUFFS + 1)); | |
225 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
226 | card->read.ccws[cnt].cmd_code = LCS_CCW_READ; | |
227 | card->read.ccws[cnt].count = LCS_IOBUFFERSIZE; | |
228 | card->read.ccws[cnt].flags = | |
229 | CCW_FLAG_CC | CCW_FLAG_SLI | CCW_FLAG_PCI; | |
230 | /* | |
231 | * Note: we have allocated the buffer with GFP_DMA, so | |
232 | * we do not need to do set_normalized_cda. | |
233 | */ | |
234 | card->read.ccws[cnt].cda = | |
235 | (__u32) __pa(card->read.iob[cnt].data); | |
236 | ((struct lcs_header *) | |
237 | card->read.iob[cnt].data)->offset = LCS_ILLEGAL_OFFSET; | |
238 | card->read.iob[cnt].callback = lcs_get_frames_cb; | |
239 | card->read.iob[cnt].state = BUF_STATE_READY; | |
240 | card->read.iob[cnt].count = LCS_IOBUFFERSIZE; | |
241 | } | |
242 | card->read.ccws[0].flags &= ~CCW_FLAG_PCI; | |
243 | card->read.ccws[LCS_NUM_BUFFS - 1].flags &= ~CCW_FLAG_PCI; | |
244 | card->read.ccws[LCS_NUM_BUFFS - 1].flags |= CCW_FLAG_SUSPEND; | |
245 | /* Last ccw is a tic (transfer in channel). */ | |
246 | card->read.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER; | |
247 | card->read.ccws[LCS_NUM_BUFFS].cda = | |
248 | (__u32) __pa(card->read.ccws); | |
249 | /* Setg initial state of the read channel. */ | |
250 | card->read.state = CH_STATE_INIT; | |
251 | ||
252 | card->read.io_idx = 0; | |
253 | card->read.buf_idx = 0; | |
254 | } | |
255 | ||
256 | static void | |
257 | lcs_setup_read(struct lcs_card *card) | |
258 | { | |
259 | LCS_DBF_TEXT(3, setup, "initread"); | |
260 | ||
261 | lcs_setup_read_ccws(card); | |
262 | /* Initialize read channel tasklet. */ | |
263 | card->read.irq_tasklet.data = (unsigned long) &card->read; | |
264 | card->read.irq_tasklet.func = lcs_tasklet; | |
265 | /* Initialize waitqueue. */ | |
266 | init_waitqueue_head(&card->read.wait_q); | |
267 | } | |
268 | ||
269 | /* | |
270 | * Setup write channel. | |
271 | */ | |
272 | static void | |
273 | lcs_setup_write_ccws(struct lcs_card *card) | |
274 | { | |
275 | int cnt; | |
276 | ||
277 | LCS_DBF_TEXT(3, setup, "iwritccw"); | |
278 | /* Setup write ccws. */ | |
279 | memset(card->write.ccws, 0, sizeof(struct ccw1) * LCS_NUM_BUFFS + 1); | |
280 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
281 | card->write.ccws[cnt].cmd_code = LCS_CCW_WRITE; | |
282 | card->write.ccws[cnt].count = 0; | |
283 | card->write.ccws[cnt].flags = | |
284 | CCW_FLAG_SUSPEND | CCW_FLAG_CC | CCW_FLAG_SLI; | |
285 | /* | |
286 | * Note: we have allocated the buffer with GFP_DMA, so | |
287 | * we do not need to do set_normalized_cda. | |
288 | */ | |
289 | card->write.ccws[cnt].cda = | |
290 | (__u32) __pa(card->write.iob[cnt].data); | |
291 | } | |
292 | /* Last ccw is a tic (transfer in channel). */ | |
293 | card->write.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER; | |
294 | card->write.ccws[LCS_NUM_BUFFS].cda = | |
295 | (__u32) __pa(card->write.ccws); | |
296 | /* Set initial state of the write channel. */ | |
297 | card->read.state = CH_STATE_INIT; | |
298 | ||
299 | card->write.io_idx = 0; | |
300 | card->write.buf_idx = 0; | |
301 | } | |
302 | ||
303 | static void | |
304 | lcs_setup_write(struct lcs_card *card) | |
305 | { | |
306 | LCS_DBF_TEXT(3, setup, "initwrit"); | |
307 | ||
308 | lcs_setup_write_ccws(card); | |
309 | /* Initialize write channel tasklet. */ | |
310 | card->write.irq_tasklet.data = (unsigned long) &card->write; | |
311 | card->write.irq_tasklet.func = lcs_tasklet; | |
312 | /* Initialize waitqueue. */ | |
313 | init_waitqueue_head(&card->write.wait_q); | |
314 | } | |
315 | ||
316 | static void | |
317 | lcs_set_allowed_threads(struct lcs_card *card, unsigned long threads) | |
318 | { | |
319 | unsigned long flags; | |
320 | ||
321 | spin_lock_irqsave(&card->mask_lock, flags); | |
322 | card->thread_allowed_mask = threads; | |
323 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
324 | wake_up(&card->wait_q); | |
325 | } | |
326 | static inline int | |
327 | lcs_threads_running(struct lcs_card *card, unsigned long threads) | |
328 | { | |
329 | unsigned long flags; | |
330 | int rc = 0; | |
331 | ||
332 | spin_lock_irqsave(&card->mask_lock, flags); | |
333 | rc = (card->thread_running_mask & threads); | |
334 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
335 | return rc; | |
336 | } | |
337 | ||
338 | static int | |
339 | lcs_wait_for_threads(struct lcs_card *card, unsigned long threads) | |
340 | { | |
341 | return wait_event_interruptible(card->wait_q, | |
342 | lcs_threads_running(card, threads) == 0); | |
343 | } | |
344 | ||
345 | static inline int | |
346 | lcs_set_thread_start_bit(struct lcs_card *card, unsigned long thread) | |
347 | { | |
348 | unsigned long flags; | |
349 | ||
350 | spin_lock_irqsave(&card->mask_lock, flags); | |
351 | if ( !(card->thread_allowed_mask & thread) || | |
352 | (card->thread_start_mask & thread) ) { | |
353 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
354 | return -EPERM; | |
355 | } | |
356 | card->thread_start_mask |= thread; | |
357 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
358 | return 0; | |
359 | } | |
360 | ||
361 | static void | |
362 | lcs_clear_thread_running_bit(struct lcs_card *card, unsigned long thread) | |
363 | { | |
364 | unsigned long flags; | |
365 | ||
366 | spin_lock_irqsave(&card->mask_lock, flags); | |
367 | card->thread_running_mask &= ~thread; | |
368 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
369 | wake_up(&card->wait_q); | |
370 | } | |
371 | ||
372 | static inline int | |
373 | __lcs_do_run_thread(struct lcs_card *card, unsigned long thread) | |
374 | { | |
375 | unsigned long flags; | |
376 | int rc = 0; | |
377 | ||
378 | spin_lock_irqsave(&card->mask_lock, flags); | |
379 | if (card->thread_start_mask & thread){ | |
380 | if ((card->thread_allowed_mask & thread) && | |
381 | !(card->thread_running_mask & thread)){ | |
382 | rc = 1; | |
383 | card->thread_start_mask &= ~thread; | |
384 | card->thread_running_mask |= thread; | |
385 | } else | |
386 | rc = -EPERM; | |
387 | } | |
388 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
389 | return rc; | |
390 | } | |
391 | ||
392 | static int | |
393 | lcs_do_run_thread(struct lcs_card *card, unsigned long thread) | |
394 | { | |
395 | int rc = 0; | |
396 | wait_event(card->wait_q, | |
397 | (rc = __lcs_do_run_thread(card, thread)) >= 0); | |
398 | return rc; | |
399 | } | |
400 | ||
401 | static int | |
402 | lcs_do_start_thread(struct lcs_card *card, unsigned long thread) | |
403 | { | |
404 | unsigned long flags; | |
405 | int rc = 0; | |
406 | ||
407 | spin_lock_irqsave(&card->mask_lock, flags); | |
408 | LCS_DBF_TEXT_(4, trace, " %02x%02x%02x", | |
409 | (u8) card->thread_start_mask, | |
410 | (u8) card->thread_allowed_mask, | |
411 | (u8) card->thread_running_mask); | |
412 | rc = (card->thread_start_mask & thread); | |
413 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
414 | return rc; | |
415 | } | |
416 | ||
417 | /** | |
418 | * Initialize channels,card and state machines. | |
419 | */ | |
420 | static void | |
421 | lcs_setup_card(struct lcs_card *card) | |
422 | { | |
423 | LCS_DBF_TEXT(2, setup, "initcard"); | |
424 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
425 | ||
426 | lcs_setup_read(card); | |
427 | lcs_setup_write(card); | |
428 | /* Set cards initial state. */ | |
429 | card->state = DEV_STATE_DOWN; | |
430 | card->tx_buffer = NULL; | |
431 | card->tx_emitted = 0; | |
432 | ||
1da177e4 LT |
433 | init_waitqueue_head(&card->wait_q); |
434 | spin_lock_init(&card->lock); | |
435 | spin_lock_init(&card->ipm_lock); | |
436 | spin_lock_init(&card->mask_lock); | |
437 | #ifdef CONFIG_IP_MULTICAST | |
438 | INIT_LIST_HEAD(&card->ipm_list); | |
439 | #endif | |
440 | INIT_LIST_HEAD(&card->lancmd_waiters); | |
441 | } | |
442 | ||
443 | static inline void | |
444 | lcs_clear_multicast_list(struct lcs_card *card) | |
445 | { | |
446 | #ifdef CONFIG_IP_MULTICAST | |
447 | struct lcs_ipm_list *ipm; | |
448 | unsigned long flags; | |
449 | ||
450 | /* Free multicast list. */ | |
451 | LCS_DBF_TEXT(3, setup, "clmclist"); | |
452 | spin_lock_irqsave(&card->ipm_lock, flags); | |
453 | while (!list_empty(&card->ipm_list)){ | |
454 | ipm = list_entry(card->ipm_list.next, | |
455 | struct lcs_ipm_list, list); | |
456 | list_del(&ipm->list); | |
457 | if (ipm->ipm_state != LCS_IPM_STATE_SET_REQUIRED){ | |
458 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
459 | lcs_send_delipm(card, ipm); | |
460 | spin_lock_irqsave(&card->ipm_lock, flags); | |
461 | } | |
462 | kfree(ipm); | |
463 | } | |
464 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
465 | #endif | |
466 | } | |
467 | /** | |
468 | * Cleanup channels,card and state machines. | |
469 | */ | |
470 | static void | |
471 | lcs_cleanup_card(struct lcs_card *card) | |
472 | { | |
473 | ||
474 | LCS_DBF_TEXT(3, setup, "cleancrd"); | |
475 | LCS_DBF_HEX(2,setup,&card,sizeof(void*)); | |
476 | ||
477 | if (card->dev != NULL) | |
478 | free_netdev(card->dev); | |
479 | /* Cleanup channels. */ | |
480 | lcs_cleanup_channel(&card->write); | |
481 | lcs_cleanup_channel(&card->read); | |
482 | } | |
483 | ||
484 | /** | |
485 | * Start channel. | |
486 | */ | |
487 | static int | |
488 | lcs_start_channel(struct lcs_channel *channel) | |
489 | { | |
490 | unsigned long flags; | |
491 | int rc; | |
492 | ||
493 | LCS_DBF_TEXT_(4,trace,"ssch%s", channel->ccwdev->dev.bus_id); | |
494 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); | |
495 | rc = ccw_device_start(channel->ccwdev, | |
496 | channel->ccws + channel->io_idx, 0, 0, | |
497 | DOIO_DENY_PREFETCH | DOIO_ALLOW_SUSPEND); | |
498 | if (rc == 0) | |
499 | channel->state = CH_STATE_RUNNING; | |
500 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
501 | if (rc) { | |
502 | LCS_DBF_TEXT_(4,trace,"essh%s", channel->ccwdev->dev.bus_id); | |
503 | PRINT_ERR("Error in starting channel, rc=%d!\n", rc); | |
504 | } | |
505 | return rc; | |
506 | } | |
507 | ||
508 | static int | |
509 | lcs_clear_channel(struct lcs_channel *channel) | |
510 | { | |
511 | unsigned long flags; | |
512 | int rc; | |
513 | ||
514 | LCS_DBF_TEXT(4,trace,"clearch"); | |
515 | LCS_DBF_TEXT_(4,trace,"%s", channel->ccwdev->dev.bus_id); | |
516 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); | |
517 | rc = ccw_device_clear(channel->ccwdev, (addr_t) channel); | |
518 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
519 | if (rc) { | |
520 | LCS_DBF_TEXT_(4,trace,"ecsc%s", channel->ccwdev->dev.bus_id); | |
521 | return rc; | |
522 | } | |
523 | wait_event(channel->wait_q, (channel->state == CH_STATE_CLEARED)); | |
524 | channel->state = CH_STATE_STOPPED; | |
525 | return rc; | |
526 | } | |
527 | ||
528 | ||
529 | /** | |
530 | * Stop channel. | |
531 | */ | |
532 | static int | |
533 | lcs_stop_channel(struct lcs_channel *channel) | |
534 | { | |
535 | unsigned long flags; | |
536 | int rc; | |
537 | ||
538 | if (channel->state == CH_STATE_STOPPED) | |
539 | return 0; | |
540 | LCS_DBF_TEXT(4,trace,"haltsch"); | |
541 | LCS_DBF_TEXT_(4,trace,"%s", channel->ccwdev->dev.bus_id); | |
542 | channel->state = CH_STATE_INIT; | |
543 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); | |
544 | rc = ccw_device_halt(channel->ccwdev, (addr_t) channel); | |
545 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
546 | if (rc) { | |
547 | LCS_DBF_TEXT_(4,trace,"ehsc%s", channel->ccwdev->dev.bus_id); | |
548 | return rc; | |
549 | } | |
550 | /* Asynchronous halt initialted. Wait for its completion. */ | |
551 | wait_event(channel->wait_q, (channel->state == CH_STATE_HALTED)); | |
552 | lcs_clear_channel(channel); | |
553 | return 0; | |
554 | } | |
555 | ||
556 | /** | |
557 | * start read and write channel | |
558 | */ | |
559 | static int | |
560 | lcs_start_channels(struct lcs_card *card) | |
561 | { | |
562 | int rc; | |
563 | ||
564 | LCS_DBF_TEXT(2, trace, "chstart"); | |
565 | /* start read channel */ | |
566 | rc = lcs_start_channel(&card->read); | |
567 | if (rc) | |
568 | return rc; | |
569 | /* start write channel */ | |
570 | rc = lcs_start_channel(&card->write); | |
571 | if (rc) | |
572 | lcs_stop_channel(&card->read); | |
573 | return rc; | |
574 | } | |
575 | ||
576 | /** | |
577 | * stop read and write channel | |
578 | */ | |
579 | static int | |
580 | lcs_stop_channels(struct lcs_card *card) | |
581 | { | |
582 | LCS_DBF_TEXT(2, trace, "chhalt"); | |
583 | lcs_stop_channel(&card->read); | |
584 | lcs_stop_channel(&card->write); | |
585 | return 0; | |
586 | } | |
587 | ||
588 | /** | |
589 | * Get empty buffer. | |
590 | */ | |
591 | static struct lcs_buffer * | |
592 | __lcs_get_buffer(struct lcs_channel *channel) | |
593 | { | |
594 | int index; | |
595 | ||
596 | LCS_DBF_TEXT(5, trace, "_getbuff"); | |
597 | index = channel->io_idx; | |
598 | do { | |
599 | if (channel->iob[index].state == BUF_STATE_EMPTY) { | |
600 | channel->iob[index].state = BUF_STATE_LOCKED; | |
601 | return channel->iob + index; | |
602 | } | |
603 | index = (index + 1) & (LCS_NUM_BUFFS - 1); | |
604 | } while (index != channel->io_idx); | |
605 | return NULL; | |
606 | } | |
607 | ||
608 | static struct lcs_buffer * | |
609 | lcs_get_buffer(struct lcs_channel *channel) | |
610 | { | |
611 | struct lcs_buffer *buffer; | |
612 | unsigned long flags; | |
613 | ||
614 | LCS_DBF_TEXT(5, trace, "getbuff"); | |
615 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); | |
616 | buffer = __lcs_get_buffer(channel); | |
617 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
618 | return buffer; | |
619 | } | |
620 | ||
621 | /** | |
622 | * Resume channel program if the channel is suspended. | |
623 | */ | |
624 | static int | |
625 | __lcs_resume_channel(struct lcs_channel *channel) | |
626 | { | |
627 | int rc; | |
628 | ||
629 | if (channel->state != CH_STATE_SUSPENDED) | |
630 | return 0; | |
631 | if (channel->ccws[channel->io_idx].flags & CCW_FLAG_SUSPEND) | |
632 | return 0; | |
633 | LCS_DBF_TEXT_(5, trace, "rsch%s", channel->ccwdev->dev.bus_id); | |
634 | rc = ccw_device_resume(channel->ccwdev); | |
635 | if (rc) { | |
636 | LCS_DBF_TEXT_(4, trace, "ersc%s", channel->ccwdev->dev.bus_id); | |
637 | PRINT_ERR("Error in lcs_resume_channel: rc=%d\n",rc); | |
638 | } else | |
639 | channel->state = CH_STATE_RUNNING; | |
640 | return rc; | |
641 | ||
642 | } | |
643 | ||
644 | /** | |
645 | * Make a buffer ready for processing. | |
646 | */ | |
647 | static inline void | |
648 | __lcs_ready_buffer_bits(struct lcs_channel *channel, int index) | |
649 | { | |
650 | int prev, next; | |
651 | ||
652 | LCS_DBF_TEXT(5, trace, "rdybits"); | |
653 | prev = (index - 1) & (LCS_NUM_BUFFS - 1); | |
654 | next = (index + 1) & (LCS_NUM_BUFFS - 1); | |
655 | /* Check if we may clear the suspend bit of this buffer. */ | |
656 | if (channel->ccws[next].flags & CCW_FLAG_SUSPEND) { | |
657 | /* Check if we have to set the PCI bit. */ | |
658 | if (!(channel->ccws[prev].flags & CCW_FLAG_SUSPEND)) | |
659 | /* Suspend bit of the previous buffer is not set. */ | |
660 | channel->ccws[index].flags |= CCW_FLAG_PCI; | |
661 | /* Suspend bit of the next buffer is set. */ | |
662 | channel->ccws[index].flags &= ~CCW_FLAG_SUSPEND; | |
663 | } | |
664 | } | |
665 | ||
666 | static int | |
667 | lcs_ready_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
668 | { | |
669 | unsigned long flags; | |
670 | int index, rc; | |
671 | ||
672 | LCS_DBF_TEXT(5, trace, "rdybuff"); | |
27eb5ac8 KW |
673 | if (buffer->state != BUF_STATE_LOCKED && |
674 | buffer->state != BUF_STATE_PROCESSED) | |
675 | BUG(); | |
1da177e4 LT |
676 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
677 | buffer->state = BUF_STATE_READY; | |
678 | index = buffer - channel->iob; | |
679 | /* Set length. */ | |
680 | channel->ccws[index].count = buffer->count; | |
681 | /* Check relevant PCI/suspend bits. */ | |
682 | __lcs_ready_buffer_bits(channel, index); | |
683 | rc = __lcs_resume_channel(channel); | |
684 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
685 | return rc; | |
686 | } | |
687 | ||
688 | /** | |
689 | * Mark the buffer as processed. Take care of the suspend bit | |
690 | * of the previous buffer. This function is called from | |
691 | * interrupt context, so the lock must not be taken. | |
692 | */ | |
693 | static int | |
694 | __lcs_processed_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
695 | { | |
696 | int index, prev, next; | |
697 | ||
698 | LCS_DBF_TEXT(5, trace, "prcsbuff"); | |
27eb5ac8 KW |
699 | if (buffer->state != BUF_STATE_READY) |
700 | BUG(); | |
1da177e4 LT |
701 | buffer->state = BUF_STATE_PROCESSED; |
702 | index = buffer - channel->iob; | |
703 | prev = (index - 1) & (LCS_NUM_BUFFS - 1); | |
704 | next = (index + 1) & (LCS_NUM_BUFFS - 1); | |
705 | /* Set the suspend bit and clear the PCI bit of this buffer. */ | |
706 | channel->ccws[index].flags |= CCW_FLAG_SUSPEND; | |
707 | channel->ccws[index].flags &= ~CCW_FLAG_PCI; | |
708 | /* Check the suspend bit of the previous buffer. */ | |
709 | if (channel->iob[prev].state == BUF_STATE_READY) { | |
710 | /* | |
711 | * Previous buffer is in state ready. It might have | |
712 | * happened in lcs_ready_buffer that the suspend bit | |
713 | * has not been cleared to avoid an endless loop. | |
714 | * Do it now. | |
715 | */ | |
716 | __lcs_ready_buffer_bits(channel, prev); | |
717 | } | |
718 | /* Clear PCI bit of next buffer. */ | |
719 | channel->ccws[next].flags &= ~CCW_FLAG_PCI; | |
720 | return __lcs_resume_channel(channel); | |
721 | } | |
722 | ||
723 | /** | |
724 | * Put a processed buffer back to state empty. | |
725 | */ | |
726 | static void | |
727 | lcs_release_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
728 | { | |
729 | unsigned long flags; | |
730 | ||
731 | LCS_DBF_TEXT(5, trace, "relbuff"); | |
27eb5ac8 KW |
732 | if (buffer->state != BUF_STATE_LOCKED && |
733 | buffer->state != BUF_STATE_PROCESSED) | |
734 | BUG(); | |
1da177e4 LT |
735 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
736 | buffer->state = BUF_STATE_EMPTY; | |
737 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
738 | } | |
739 | ||
740 | /** | |
741 | * Get buffer for a lan command. | |
742 | */ | |
743 | static struct lcs_buffer * | |
744 | lcs_get_lancmd(struct lcs_card *card, int count) | |
745 | { | |
746 | struct lcs_buffer *buffer; | |
747 | struct lcs_cmd *cmd; | |
748 | ||
749 | LCS_DBF_TEXT(4, trace, "getlncmd"); | |
750 | /* Get buffer and wait if none is available. */ | |
751 | wait_event(card->write.wait_q, | |
752 | ((buffer = lcs_get_buffer(&card->write)) != NULL)); | |
753 | count += sizeof(struct lcs_header); | |
754 | *(__u16 *)(buffer->data + count) = 0; | |
755 | buffer->count = count + sizeof(__u16); | |
756 | buffer->callback = lcs_release_buffer; | |
757 | cmd = (struct lcs_cmd *) buffer->data; | |
758 | cmd->offset = count; | |
759 | cmd->type = LCS_FRAME_TYPE_CONTROL; | |
760 | cmd->slot = 0; | |
761 | return buffer; | |
762 | } | |
763 | ||
764 | ||
765 | static void | |
766 | lcs_get_reply(struct lcs_reply *reply) | |
767 | { | |
768 | WARN_ON(atomic_read(&reply->refcnt) <= 0); | |
769 | atomic_inc(&reply->refcnt); | |
770 | } | |
771 | ||
772 | static void | |
773 | lcs_put_reply(struct lcs_reply *reply) | |
774 | { | |
775 | WARN_ON(atomic_read(&reply->refcnt) <= 0); | |
776 | if (atomic_dec_and_test(&reply->refcnt)) { | |
777 | kfree(reply); | |
778 | } | |
779 | ||
780 | } | |
781 | ||
782 | static struct lcs_reply * | |
783 | lcs_alloc_reply(struct lcs_cmd *cmd) | |
784 | { | |
785 | struct lcs_reply *reply; | |
786 | ||
787 | LCS_DBF_TEXT(4, trace, "getreply"); | |
788 | ||
88abaab4 | 789 | reply = kzalloc(sizeof(struct lcs_reply), GFP_ATOMIC); |
1da177e4 LT |
790 | if (!reply) |
791 | return NULL; | |
1da177e4 LT |
792 | atomic_set(&reply->refcnt,1); |
793 | reply->sequence_no = cmd->sequence_no; | |
794 | reply->received = 0; | |
795 | reply->rc = 0; | |
796 | init_waitqueue_head(&reply->wait_q); | |
797 | ||
798 | return reply; | |
799 | } | |
800 | ||
801 | /** | |
802 | * Notifier function for lancmd replies. Called from read irq. | |
803 | */ | |
804 | static void | |
805 | lcs_notify_lancmd_waiters(struct lcs_card *card, struct lcs_cmd *cmd) | |
806 | { | |
807 | struct list_head *l, *n; | |
808 | struct lcs_reply *reply; | |
809 | ||
810 | LCS_DBF_TEXT(4, trace, "notiwait"); | |
811 | spin_lock(&card->lock); | |
812 | list_for_each_safe(l, n, &card->lancmd_waiters) { | |
813 | reply = list_entry(l, struct lcs_reply, list); | |
814 | if (reply->sequence_no == cmd->sequence_no) { | |
815 | lcs_get_reply(reply); | |
816 | list_del_init(&reply->list); | |
817 | if (reply->callback != NULL) | |
818 | reply->callback(card, cmd); | |
819 | reply->received = 1; | |
820 | reply->rc = cmd->return_code; | |
821 | wake_up(&reply->wait_q); | |
822 | lcs_put_reply(reply); | |
823 | break; | |
824 | } | |
825 | } | |
826 | spin_unlock(&card->lock); | |
827 | } | |
828 | ||
829 | /** | |
830 | * Emit buffer of a lan comand. | |
831 | */ | |
832 | void | |
833 | lcs_lancmd_timeout(unsigned long data) | |
834 | { | |
835 | struct lcs_reply *reply, *list_reply, *r; | |
836 | unsigned long flags; | |
837 | ||
838 | LCS_DBF_TEXT(4, trace, "timeout"); | |
839 | reply = (struct lcs_reply *) data; | |
840 | spin_lock_irqsave(&reply->card->lock, flags); | |
841 | list_for_each_entry_safe(list_reply, r, | |
842 | &reply->card->lancmd_waiters,list) { | |
843 | if (reply == list_reply) { | |
844 | lcs_get_reply(reply); | |
845 | list_del_init(&reply->list); | |
846 | spin_unlock_irqrestore(&reply->card->lock, flags); | |
847 | reply->received = 1; | |
848 | reply->rc = -ETIME; | |
849 | wake_up(&reply->wait_q); | |
850 | lcs_put_reply(reply); | |
851 | return; | |
852 | } | |
853 | } | |
854 | spin_unlock_irqrestore(&reply->card->lock, flags); | |
855 | } | |
856 | ||
857 | static int | |
858 | lcs_send_lancmd(struct lcs_card *card, struct lcs_buffer *buffer, | |
859 | void (*reply_callback)(struct lcs_card *, struct lcs_cmd *)) | |
860 | { | |
861 | struct lcs_reply *reply; | |
862 | struct lcs_cmd *cmd; | |
863 | struct timer_list timer; | |
864 | unsigned long flags; | |
865 | int rc; | |
866 | ||
867 | LCS_DBF_TEXT(4, trace, "sendcmd"); | |
868 | cmd = (struct lcs_cmd *) buffer->data; | |
869 | cmd->return_code = 0; | |
870 | cmd->sequence_no = card->sequence_no++; | |
871 | reply = lcs_alloc_reply(cmd); | |
872 | if (!reply) | |
873 | return -ENOMEM; | |
874 | reply->callback = reply_callback; | |
875 | reply->card = card; | |
876 | spin_lock_irqsave(&card->lock, flags); | |
877 | list_add_tail(&reply->list, &card->lancmd_waiters); | |
878 | spin_unlock_irqrestore(&card->lock, flags); | |
879 | ||
880 | buffer->callback = lcs_release_buffer; | |
881 | rc = lcs_ready_buffer(&card->write, buffer); | |
882 | if (rc) | |
883 | return rc; | |
884 | init_timer(&timer); | |
885 | timer.function = lcs_lancmd_timeout; | |
886 | timer.data = (unsigned long) reply; | |
887 | timer.expires = jiffies + HZ*card->lancmd_timeout; | |
888 | add_timer(&timer); | |
889 | wait_event(reply->wait_q, reply->received); | |
890 | del_timer_sync(&timer); | |
891 | LCS_DBF_TEXT_(4, trace, "rc:%d",reply->rc); | |
892 | rc = reply->rc; | |
893 | lcs_put_reply(reply); | |
894 | return rc ? -EIO : 0; | |
895 | } | |
896 | ||
897 | /** | |
898 | * LCS startup command | |
899 | */ | |
900 | static int | |
901 | lcs_send_startup(struct lcs_card *card, __u8 initiator) | |
902 | { | |
903 | struct lcs_buffer *buffer; | |
904 | struct lcs_cmd *cmd; | |
905 | ||
906 | LCS_DBF_TEXT(2, trace, "startup"); | |
907 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
908 | cmd = (struct lcs_cmd *) buffer->data; | |
909 | cmd->cmd_code = LCS_CMD_STARTUP; | |
910 | cmd->initiator = initiator; | |
911 | cmd->cmd.lcs_startup.buff_size = LCS_IOBUFFERSIZE; | |
912 | return lcs_send_lancmd(card, buffer, NULL); | |
913 | } | |
914 | ||
915 | /** | |
916 | * LCS shutdown command | |
917 | */ | |
918 | static int | |
919 | lcs_send_shutdown(struct lcs_card *card) | |
920 | { | |
921 | struct lcs_buffer *buffer; | |
922 | struct lcs_cmd *cmd; | |
923 | ||
924 | LCS_DBF_TEXT(2, trace, "shutdown"); | |
925 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
926 | cmd = (struct lcs_cmd *) buffer->data; | |
927 | cmd->cmd_code = LCS_CMD_SHUTDOWN; | |
928 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
929 | return lcs_send_lancmd(card, buffer, NULL); | |
930 | } | |
931 | ||
932 | /** | |
933 | * LCS lanstat command | |
934 | */ | |
935 | static void | |
936 | __lcs_lanstat_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
937 | { | |
938 | LCS_DBF_TEXT(2, trace, "statcb"); | |
939 | memcpy(card->mac, cmd->cmd.lcs_lanstat_cmd.mac_addr, LCS_MAC_LENGTH); | |
940 | } | |
941 | ||
942 | static int | |
943 | lcs_send_lanstat(struct lcs_card *card) | |
944 | { | |
945 | struct lcs_buffer *buffer; | |
946 | struct lcs_cmd *cmd; | |
947 | ||
948 | LCS_DBF_TEXT(2,trace, "cmdstat"); | |
949 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
950 | cmd = (struct lcs_cmd *) buffer->data; | |
951 | /* Setup lanstat command. */ | |
952 | cmd->cmd_code = LCS_CMD_LANSTAT; | |
953 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
954 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
955 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
956 | return lcs_send_lancmd(card, buffer, __lcs_lanstat_cb); | |
957 | } | |
958 | ||
959 | /** | |
960 | * send stoplan command | |
961 | */ | |
962 | static int | |
963 | lcs_send_stoplan(struct lcs_card *card, __u8 initiator) | |
964 | { | |
965 | struct lcs_buffer *buffer; | |
966 | struct lcs_cmd *cmd; | |
967 | ||
968 | LCS_DBF_TEXT(2, trace, "cmdstpln"); | |
969 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
970 | cmd = (struct lcs_cmd *) buffer->data; | |
971 | cmd->cmd_code = LCS_CMD_STOPLAN; | |
972 | cmd->initiator = initiator; | |
973 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
974 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
975 | return lcs_send_lancmd(card, buffer, NULL); | |
976 | } | |
977 | ||
978 | /** | |
979 | * send startlan command | |
980 | */ | |
981 | static void | |
982 | __lcs_send_startlan_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
983 | { | |
984 | LCS_DBF_TEXT(2, trace, "srtlancb"); | |
985 | card->lan_type = cmd->cmd.lcs_std_cmd.lan_type; | |
986 | card->portno = cmd->cmd.lcs_std_cmd.portno; | |
987 | } | |
988 | ||
989 | static int | |
990 | lcs_send_startlan(struct lcs_card *card, __u8 initiator) | |
991 | { | |
992 | struct lcs_buffer *buffer; | |
993 | struct lcs_cmd *cmd; | |
994 | ||
995 | LCS_DBF_TEXT(2, trace, "cmdstaln"); | |
996 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
997 | cmd = (struct lcs_cmd *) buffer->data; | |
998 | cmd->cmd_code = LCS_CMD_STARTLAN; | |
999 | cmd->initiator = initiator; | |
1000 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
1001 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
1002 | return lcs_send_lancmd(card, buffer, __lcs_send_startlan_cb); | |
1003 | } | |
1004 | ||
1005 | #ifdef CONFIG_IP_MULTICAST | |
1006 | /** | |
1007 | * send setipm command (Multicast) | |
1008 | */ | |
1009 | static int | |
1010 | lcs_send_setipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list) | |
1011 | { | |
1012 | struct lcs_buffer *buffer; | |
1013 | struct lcs_cmd *cmd; | |
1014 | ||
1015 | LCS_DBF_TEXT(2, trace, "cmdsetim"); | |
1016 | buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE); | |
1017 | cmd = (struct lcs_cmd *) buffer->data; | |
1018 | cmd->cmd_code = LCS_CMD_SETIPM; | |
1019 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1020 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1021 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1022 | cmd->cmd.lcs_qipassist.version = 4; | |
1023 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1024 | memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair, | |
1025 | &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair)); | |
1026 | LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr); | |
1027 | return lcs_send_lancmd(card, buffer, NULL); | |
1028 | } | |
1029 | ||
1030 | /** | |
1031 | * send delipm command (Multicast) | |
1032 | */ | |
1033 | static int | |
1034 | lcs_send_delipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list) | |
1035 | { | |
1036 | struct lcs_buffer *buffer; | |
1037 | struct lcs_cmd *cmd; | |
1038 | ||
1039 | LCS_DBF_TEXT(2, trace, "cmddelim"); | |
1040 | buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE); | |
1041 | cmd = (struct lcs_cmd *) buffer->data; | |
1042 | cmd->cmd_code = LCS_CMD_DELIPM; | |
1043 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1044 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1045 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1046 | cmd->cmd.lcs_qipassist.version = 4; | |
1047 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1048 | memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair, | |
1049 | &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair)); | |
1050 | LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr); | |
1051 | return lcs_send_lancmd(card, buffer, NULL); | |
1052 | } | |
1053 | ||
1054 | /** | |
1055 | * check if multicast is supported by LCS | |
1056 | */ | |
1057 | static void | |
1058 | __lcs_check_multicast_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
1059 | { | |
1060 | LCS_DBF_TEXT(2, trace, "chkmccb"); | |
1061 | card->ip_assists_supported = | |
1062 | cmd->cmd.lcs_qipassist.ip_assists_supported; | |
1063 | card->ip_assists_enabled = | |
1064 | cmd->cmd.lcs_qipassist.ip_assists_enabled; | |
1065 | } | |
1066 | ||
1067 | static int | |
1068 | lcs_check_multicast_support(struct lcs_card *card) | |
1069 | { | |
1070 | struct lcs_buffer *buffer; | |
1071 | struct lcs_cmd *cmd; | |
1072 | int rc; | |
1073 | ||
1074 | LCS_DBF_TEXT(2, trace, "cmdqipa"); | |
1075 | /* Send query ipassist. */ | |
1076 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
1077 | cmd = (struct lcs_cmd *) buffer->data; | |
1078 | cmd->cmd_code = LCS_CMD_QIPASSIST; | |
1079 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1080 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1081 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1082 | cmd->cmd.lcs_qipassist.version = 4; | |
1083 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1084 | rc = lcs_send_lancmd(card, buffer, __lcs_check_multicast_cb); | |
1085 | if (rc != 0) { | |
1086 | PRINT_ERR("Query IPAssist failed. Assuming unsupported!\n"); | |
1087 | return -EOPNOTSUPP; | |
1088 | } | |
1da177e4 LT |
1089 | if (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) |
1090 | return 0; | |
1091 | return -EOPNOTSUPP; | |
1092 | } | |
1093 | ||
1094 | /** | |
1095 | * set or del multicast address on LCS card | |
1096 | */ | |
1097 | static void | |
1098 | lcs_fix_multicast_list(struct lcs_card *card) | |
1099 | { | |
1100 | struct list_head failed_list; | |
1101 | struct lcs_ipm_list *ipm, *tmp; | |
1102 | unsigned long flags; | |
1103 | int rc; | |
1104 | ||
1105 | LCS_DBF_TEXT(4,trace, "fixipm"); | |
1106 | INIT_LIST_HEAD(&failed_list); | |
1107 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1108 | list_modified: | |
1109 | list_for_each_entry_safe(ipm, tmp, &card->ipm_list, list){ | |
1110 | switch (ipm->ipm_state) { | |
1111 | case LCS_IPM_STATE_SET_REQUIRED: | |
1112 | /* del from ipm_list so noone else can tamper with | |
1113 | * this entry */ | |
1114 | list_del_init(&ipm->list); | |
1115 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1116 | rc = lcs_send_setipm(card, ipm); | |
1117 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1118 | if (rc) { | |
1119 | PRINT_INFO("Adding multicast address failed." | |
1120 | "Table possibly full!\n"); | |
1121 | /* store ipm in failed list -> will be added | |
1122 | * to ipm_list again, so a retry will be done | |
1123 | * during the next call of this function */ | |
1124 | list_add_tail(&ipm->list, &failed_list); | |
1125 | } else { | |
1126 | ipm->ipm_state = LCS_IPM_STATE_ON_CARD; | |
1127 | /* re-insert into ipm_list */ | |
1128 | list_add_tail(&ipm->list, &card->ipm_list); | |
1129 | } | |
1130 | goto list_modified; | |
1131 | case LCS_IPM_STATE_DEL_REQUIRED: | |
1132 | list_del(&ipm->list); | |
1133 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1134 | lcs_send_delipm(card, ipm); | |
1135 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1136 | kfree(ipm); | |
1137 | goto list_modified; | |
1138 | case LCS_IPM_STATE_ON_CARD: | |
1139 | break; | |
1140 | } | |
1141 | } | |
1142 | /* re-insert all entries from the failed_list into ipm_list */ | |
179e0917 AM |
1143 | list_for_each_entry_safe(ipm, tmp, &failed_list, list) |
1144 | list_move_tail(&ipm->list, &card->ipm_list); | |
1145 | ||
1da177e4 | 1146 | spin_unlock_irqrestore(&card->ipm_lock, flags); |
1da177e4 LT |
1147 | } |
1148 | ||
1149 | /** | |
1150 | * get mac address for the relevant Multicast address | |
1151 | */ | |
1152 | static void | |
1153 | lcs_get_mac_for_ipm(__u32 ipm, char *mac, struct net_device *dev) | |
1154 | { | |
1155 | LCS_DBF_TEXT(4,trace, "getmac"); | |
1156 | if (dev->type == ARPHRD_IEEE802_TR) | |
1157 | ip_tr_mc_map(ipm, mac); | |
1158 | else | |
1159 | ip_eth_mc_map(ipm, mac); | |
1160 | } | |
1161 | ||
1162 | /** | |
1163 | * function called by net device to handle multicast address relevant things | |
1164 | */ | |
1165 | static inline void | |
1166 | lcs_remove_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) | |
1167 | { | |
1168 | struct ip_mc_list *im4; | |
1169 | struct list_head *l; | |
1170 | struct lcs_ipm_list *ipm; | |
1171 | unsigned long flags; | |
1172 | char buf[MAX_ADDR_LEN]; | |
1173 | ||
1174 | LCS_DBF_TEXT(4, trace, "remmclst"); | |
1175 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1176 | list_for_each(l, &card->ipm_list) { | |
1177 | ipm = list_entry(l, struct lcs_ipm_list, list); | |
1178 | for (im4 = in4_dev->mc_list; im4 != NULL; im4 = im4->next) { | |
1179 | lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); | |
1180 | if ( (ipm->ipm.ip_addr == im4->multiaddr) && | |
1181 | (memcmp(buf, &ipm->ipm.mac_addr, | |
1182 | LCS_MAC_LENGTH) == 0) ) | |
1183 | break; | |
1184 | } | |
1185 | if (im4 == NULL) | |
1186 | ipm->ipm_state = LCS_IPM_STATE_DEL_REQUIRED; | |
1187 | } | |
1188 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1189 | } | |
1190 | ||
1191 | static inline struct lcs_ipm_list * | |
1192 | lcs_check_addr_entry(struct lcs_card *card, struct ip_mc_list *im4, char *buf) | |
1193 | { | |
1194 | struct lcs_ipm_list *tmp, *ipm = NULL; | |
1195 | struct list_head *l; | |
1196 | unsigned long flags; | |
1197 | ||
1198 | LCS_DBF_TEXT(4, trace, "chkmcent"); | |
1199 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1200 | list_for_each(l, &card->ipm_list) { | |
1201 | tmp = list_entry(l, struct lcs_ipm_list, list); | |
1202 | if ( (tmp->ipm.ip_addr == im4->multiaddr) && | |
1203 | (memcmp(buf, &tmp->ipm.mac_addr, | |
1204 | LCS_MAC_LENGTH) == 0) ) { | |
1205 | ipm = tmp; | |
1206 | break; | |
1207 | } | |
1208 | } | |
1209 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1210 | return ipm; | |
1211 | } | |
1212 | ||
1213 | static inline void | |
1214 | lcs_set_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) | |
1215 | { | |
1216 | ||
1217 | struct ip_mc_list *im4; | |
1218 | struct lcs_ipm_list *ipm; | |
1219 | char buf[MAX_ADDR_LEN]; | |
1220 | unsigned long flags; | |
1221 | ||
1222 | LCS_DBF_TEXT(4, trace, "setmclst"); | |
1223 | for (im4 = in4_dev->mc_list; im4; im4 = im4->next) { | |
1224 | lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); | |
1225 | ipm = lcs_check_addr_entry(card, im4, buf); | |
1226 | if (ipm != NULL) | |
1227 | continue; /* Address already in list. */ | |
1228 | ipm = (struct lcs_ipm_list *) | |
27eb5ac8 | 1229 | kzalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC); |
1da177e4 LT |
1230 | if (ipm == NULL) { |
1231 | PRINT_INFO("Not enough memory to add " | |
1232 | "new multicast entry!\n"); | |
1233 | break; | |
1234 | } | |
1da177e4 LT |
1235 | memcpy(&ipm->ipm.mac_addr, buf, LCS_MAC_LENGTH); |
1236 | ipm->ipm.ip_addr = im4->multiaddr; | |
1237 | ipm->ipm_state = LCS_IPM_STATE_SET_REQUIRED; | |
1238 | spin_lock_irqsave(&card->ipm_lock, flags); | |
27eb5ac8 | 1239 | LCS_DBF_HEX(2,trace,&ipm->ipm.ip_addr,4); |
1da177e4 LT |
1240 | list_add(&ipm->list, &card->ipm_list); |
1241 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1242 | } | |
1243 | } | |
1244 | ||
1245 | static int | |
1246 | lcs_register_mc_addresses(void *data) | |
1247 | { | |
1248 | struct lcs_card *card; | |
1249 | struct in_device *in4_dev; | |
1250 | ||
1251 | card = (struct lcs_card *) data; | |
1252 | daemonize("regipm"); | |
1253 | ||
1254 | if (!lcs_do_run_thread(card, LCS_SET_MC_THREAD)) | |
1255 | return 0; | |
1256 | LCS_DBF_TEXT(4, trace, "regmulti"); | |
1257 | ||
1258 | in4_dev = in_dev_get(card->dev); | |
1259 | if (in4_dev == NULL) | |
1260 | goto out; | |
1261 | read_lock(&in4_dev->mc_list_lock); | |
1262 | lcs_remove_mc_addresses(card,in4_dev); | |
1263 | lcs_set_mc_addresses(card, in4_dev); | |
1264 | read_unlock(&in4_dev->mc_list_lock); | |
1265 | in_dev_put(in4_dev); | |
1266 | ||
27eb5ac8 KW |
1267 | netif_carrier_off(card->dev); |
1268 | netif_tx_disable(card->dev); | |
1269 | wait_event(card->write.wait_q, | |
1270 | (card->write.state != CH_STATE_RUNNING)); | |
1da177e4 | 1271 | lcs_fix_multicast_list(card); |
27eb5ac8 KW |
1272 | if (card->state == DEV_STATE_UP) { |
1273 | netif_carrier_on(card->dev); | |
1274 | netif_wake_queue(card->dev); | |
1275 | } | |
1da177e4 LT |
1276 | out: |
1277 | lcs_clear_thread_running_bit(card, LCS_SET_MC_THREAD); | |
1278 | return 0; | |
1279 | } | |
1280 | /** | |
1281 | * function called by net device to | |
1282 | * handle multicast address relevant things | |
1283 | */ | |
1284 | static void | |
1285 | lcs_set_multicast_list(struct net_device *dev) | |
1286 | { | |
1287 | struct lcs_card *card; | |
1288 | ||
1289 | LCS_DBF_TEXT(4, trace, "setmulti"); | |
1290 | card = (struct lcs_card *) dev->priv; | |
1291 | ||
e82b0f2c | 1292 | if (!lcs_set_thread_start_bit(card, LCS_SET_MC_THREAD)) |
1da177e4 | 1293 | schedule_work(&card->kernel_thread_starter); |
1da177e4 LT |
1294 | } |
1295 | ||
1296 | #endif /* CONFIG_IP_MULTICAST */ | |
1297 | ||
1298 | static long | |
1299 | lcs_check_irb_error(struct ccw_device *cdev, struct irb *irb) | |
1300 | { | |
1301 | if (!IS_ERR(irb)) | |
1302 | return 0; | |
1303 | ||
1304 | switch (PTR_ERR(irb)) { | |
1305 | case -EIO: | |
1306 | PRINT_WARN("i/o-error on device %s\n", cdev->dev.bus_id); | |
1307 | LCS_DBF_TEXT(2, trace, "ckirberr"); | |
1308 | LCS_DBF_TEXT_(2, trace, " rc%d", -EIO); | |
1309 | break; | |
1310 | case -ETIMEDOUT: | |
1311 | PRINT_WARN("timeout on device %s\n", cdev->dev.bus_id); | |
1312 | LCS_DBF_TEXT(2, trace, "ckirberr"); | |
1313 | LCS_DBF_TEXT_(2, trace, " rc%d", -ETIMEDOUT); | |
1314 | break; | |
1315 | default: | |
1316 | PRINT_WARN("unknown error %ld on device %s\n", PTR_ERR(irb), | |
1317 | cdev->dev.bus_id); | |
1318 | LCS_DBF_TEXT(2, trace, "ckirberr"); | |
1319 | LCS_DBF_TEXT(2, trace, " rc???"); | |
1320 | } | |
1321 | return PTR_ERR(irb); | |
1322 | } | |
1323 | ||
27eb5ac8 KW |
1324 | static int |
1325 | lcs_get_problem(struct ccw_device *cdev, struct irb *irb) | |
1326 | { | |
1327 | int dstat, cstat; | |
1328 | char *sense; | |
1329 | ||
1330 | sense = (char *) irb->ecw; | |
1331 | cstat = irb->scsw.cstat; | |
1332 | dstat = irb->scsw.dstat; | |
1333 | ||
1334 | if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK | | |
1335 | SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK | | |
1336 | SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) { | |
1337 | LCS_DBF_TEXT(2, trace, "CGENCHK"); | |
1338 | return 1; | |
1339 | } | |
1340 | if (dstat & DEV_STAT_UNIT_CHECK) { | |
1341 | if (sense[LCS_SENSE_BYTE_1] & | |
1342 | LCS_SENSE_RESETTING_EVENT) { | |
1343 | LCS_DBF_TEXT(2, trace, "REVIND"); | |
1344 | return 1; | |
1345 | } | |
1346 | if (sense[LCS_SENSE_BYTE_0] & | |
1347 | LCS_SENSE_CMD_REJECT) { | |
1348 | LCS_DBF_TEXT(2, trace, "CMDREJ"); | |
1349 | return 0; | |
1350 | } | |
1351 | if ((!sense[LCS_SENSE_BYTE_0]) && | |
1352 | (!sense[LCS_SENSE_BYTE_1]) && | |
1353 | (!sense[LCS_SENSE_BYTE_2]) && | |
1354 | (!sense[LCS_SENSE_BYTE_3])) { | |
1355 | LCS_DBF_TEXT(2, trace, "ZEROSEN"); | |
1356 | return 0; | |
1357 | } | |
1358 | LCS_DBF_TEXT(2, trace, "DGENCHK"); | |
1359 | return 1; | |
1360 | } | |
1361 | return 0; | |
1362 | } | |
1363 | ||
1364 | void | |
1365 | lcs_schedule_recovery(struct lcs_card *card) | |
1366 | { | |
1367 | LCS_DBF_TEXT(2, trace, "startrec"); | |
1368 | if (!lcs_set_thread_start_bit(card, LCS_RECOVERY_THREAD)) | |
1369 | schedule_work(&card->kernel_thread_starter); | |
1370 | } | |
1da177e4 LT |
1371 | |
1372 | /** | |
1373 | * IRQ Handler for LCS channels | |
1374 | */ | |
1375 | static void | |
1376 | lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb) | |
1377 | { | |
1378 | struct lcs_card *card; | |
1379 | struct lcs_channel *channel; | |
27eb5ac8 KW |
1380 | int rc, index; |
1381 | int cstat, dstat; | |
1da177e4 LT |
1382 | |
1383 | if (lcs_check_irb_error(cdev, irb)) | |
1384 | return; | |
1385 | ||
1386 | card = CARD_FROM_DEV(cdev); | |
1387 | if (card->read.ccwdev == cdev) | |
1388 | channel = &card->read; | |
1389 | else | |
1390 | channel = &card->write; | |
1391 | ||
27eb5ac8 KW |
1392 | cstat = irb->scsw.cstat; |
1393 | dstat = irb->scsw.dstat; | |
1da177e4 LT |
1394 | LCS_DBF_TEXT_(5, trace, "Rint%s",cdev->dev.bus_id); |
1395 | LCS_DBF_TEXT_(5, trace, "%4x%4x",irb->scsw.cstat, irb->scsw.dstat); | |
1396 | LCS_DBF_TEXT_(5, trace, "%4x%4x",irb->scsw.fctl, irb->scsw.actl); | |
1397 | ||
27eb5ac8 KW |
1398 | /* Check for channel and device errors presented */ |
1399 | rc = lcs_get_problem(cdev, irb); | |
1400 | if (rc || (dstat & DEV_STAT_UNIT_EXCEP)) { | |
e82b0f2c | 1401 | PRINT_WARN("check on device %s, dstat=0x%X, cstat=0x%X \n", |
27eb5ac8 KW |
1402 | cdev->dev.bus_id, dstat, cstat); |
1403 | if (rc) { | |
1404 | lcs_schedule_recovery(card); | |
1405 | wake_up(&card->wait_q); | |
1406 | return; | |
1407 | } | |
1408 | } | |
1da177e4 LT |
1409 | /* How far in the ccw chain have we processed? */ |
1410 | if ((channel->state != CH_STATE_INIT) && | |
1411 | (irb->scsw.fctl & SCSW_FCTL_START_FUNC)) { | |
e82b0f2c | 1412 | index = (struct ccw1 *) __va((addr_t) irb->scsw.cpa) |
1da177e4 LT |
1413 | - channel->ccws; |
1414 | if ((irb->scsw.actl & SCSW_ACTL_SUSPENDED) || | |
698d0707 | 1415 | (irb->scsw.cstat & SCHN_STAT_PCI)) |
1da177e4 LT |
1416 | /* Bloody io subsystem tells us lies about cpa... */ |
1417 | index = (index - 1) & (LCS_NUM_BUFFS - 1); | |
1418 | while (channel->io_idx != index) { | |
1419 | __lcs_processed_buffer(channel, | |
1420 | channel->iob + channel->io_idx); | |
1421 | channel->io_idx = | |
1422 | (channel->io_idx + 1) & (LCS_NUM_BUFFS - 1); | |
1423 | } | |
1424 | } | |
1425 | ||
1426 | if ((irb->scsw.dstat & DEV_STAT_DEV_END) || | |
1427 | (irb->scsw.dstat & DEV_STAT_CHN_END) || | |
1428 | (irb->scsw.dstat & DEV_STAT_UNIT_CHECK)) | |
1429 | /* Mark channel as stopped. */ | |
1430 | channel->state = CH_STATE_STOPPED; | |
1431 | else if (irb->scsw.actl & SCSW_ACTL_SUSPENDED) | |
1432 | /* CCW execution stopped on a suspend bit. */ | |
1433 | channel->state = CH_STATE_SUSPENDED; | |
1da177e4 LT |
1434 | if (irb->scsw.fctl & SCSW_FCTL_HALT_FUNC) { |
1435 | if (irb->scsw.cc != 0) { | |
1436 | ccw_device_halt(channel->ccwdev, (addr_t) channel); | |
1437 | return; | |
1438 | } | |
1439 | /* The channel has been stopped by halt_IO. */ | |
1440 | channel->state = CH_STATE_HALTED; | |
1441 | } | |
1da177e4 LT |
1442 | if (irb->scsw.fctl & SCSW_FCTL_CLEAR_FUNC) { |
1443 | channel->state = CH_STATE_CLEARED; | |
1444 | } | |
1445 | /* Do the rest in the tasklet. */ | |
1446 | tasklet_schedule(&channel->irq_tasklet); | |
1447 | } | |
1448 | ||
1449 | /** | |
1450 | * Tasklet for IRQ handler | |
1451 | */ | |
1452 | static void | |
1453 | lcs_tasklet(unsigned long data) | |
1454 | { | |
1455 | unsigned long flags; | |
1456 | struct lcs_channel *channel; | |
1457 | struct lcs_buffer *iob; | |
1458 | int buf_idx; | |
1459 | int rc; | |
1460 | ||
1461 | channel = (struct lcs_channel *) data; | |
1462 | LCS_DBF_TEXT_(5, trace, "tlet%s",channel->ccwdev->dev.bus_id); | |
1463 | ||
1464 | /* Check for processed buffers. */ | |
1465 | iob = channel->iob; | |
1466 | buf_idx = channel->buf_idx; | |
1467 | while (iob[buf_idx].state == BUF_STATE_PROCESSED) { | |
1468 | /* Do the callback thing. */ | |
1469 | if (iob[buf_idx].callback != NULL) | |
1470 | iob[buf_idx].callback(channel, iob + buf_idx); | |
1471 | buf_idx = (buf_idx + 1) & (LCS_NUM_BUFFS - 1); | |
1472 | } | |
1473 | channel->buf_idx = buf_idx; | |
1474 | ||
1475 | if (channel->state == CH_STATE_STOPPED) | |
1476 | // FIXME: what if rc != 0 ?? | |
1477 | rc = lcs_start_channel(channel); | |
1478 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); | |
1479 | if (channel->state == CH_STATE_SUSPENDED && | |
1480 | channel->iob[channel->io_idx].state == BUF_STATE_READY) { | |
1481 | // FIXME: what if rc != 0 ?? | |
1482 | rc = __lcs_resume_channel(channel); | |
1483 | } | |
1484 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
1485 | ||
1486 | /* Something happened on the channel. Wake up waiters. */ | |
1487 | wake_up(&channel->wait_q); | |
1488 | } | |
1489 | ||
1490 | /** | |
1491 | * Finish current tx buffer and make it ready for transmit. | |
1492 | */ | |
1493 | static void | |
1494 | __lcs_emit_txbuffer(struct lcs_card *card) | |
1495 | { | |
1496 | LCS_DBF_TEXT(5, trace, "emittx"); | |
1497 | *(__u16 *)(card->tx_buffer->data + card->tx_buffer->count) = 0; | |
1498 | card->tx_buffer->count += 2; | |
1499 | lcs_ready_buffer(&card->write, card->tx_buffer); | |
1500 | card->tx_buffer = NULL; | |
1501 | card->tx_emitted++; | |
1502 | } | |
1503 | ||
1504 | /** | |
1505 | * Callback for finished tx buffers. | |
1506 | */ | |
1507 | static void | |
1508 | lcs_txbuffer_cb(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
1509 | { | |
1510 | struct lcs_card *card; | |
1511 | ||
1512 | LCS_DBF_TEXT(5, trace, "txbuffcb"); | |
1513 | /* Put buffer back to pool. */ | |
1514 | lcs_release_buffer(channel, buffer); | |
1515 | card = (struct lcs_card *) | |
1516 | ((char *) channel - offsetof(struct lcs_card, write)); | |
27eb5ac8 | 1517 | if (netif_queue_stopped(card->dev) && netif_carrier_ok(card->dev)) |
0d613a27 | 1518 | netif_wake_queue(card->dev); |
1da177e4 LT |
1519 | spin_lock(&card->lock); |
1520 | card->tx_emitted--; | |
1521 | if (card->tx_emitted <= 0 && card->tx_buffer != NULL) | |
1522 | /* | |
1523 | * Last running tx buffer has finished. Submit partially | |
1524 | * filled current buffer. | |
1525 | */ | |
1526 | __lcs_emit_txbuffer(card); | |
1527 | spin_unlock(&card->lock); | |
1528 | } | |
1529 | ||
1530 | /** | |
1531 | * Packet transmit function called by network stack | |
1532 | */ | |
1533 | static int | |
1534 | __lcs_start_xmit(struct lcs_card *card, struct sk_buff *skb, | |
1535 | struct net_device *dev) | |
1536 | { | |
1537 | struct lcs_header *header; | |
0d613a27 | 1538 | int rc = 0; |
1da177e4 LT |
1539 | |
1540 | LCS_DBF_TEXT(5, trace, "hardxmit"); | |
1541 | if (skb == NULL) { | |
1542 | card->stats.tx_dropped++; | |
1543 | card->stats.tx_errors++; | |
1544 | return -EIO; | |
1545 | } | |
1546 | if (card->state != DEV_STATE_UP) { | |
1547 | dev_kfree_skb(skb); | |
1548 | card->stats.tx_dropped++; | |
1549 | card->stats.tx_errors++; | |
1550 | card->stats.tx_carrier_errors++; | |
1551 | return 0; | |
1552 | } | |
27eb5ac8 KW |
1553 | if (skb->protocol == htons(ETH_P_IPV6)) { |
1554 | dev_kfree_skb(skb); | |
1555 | return 0; | |
1556 | } | |
0d613a27 FP |
1557 | netif_stop_queue(card->dev); |
1558 | spin_lock(&card->lock); | |
1da177e4 LT |
1559 | if (card->tx_buffer != NULL && |
1560 | card->tx_buffer->count + sizeof(struct lcs_header) + | |
1561 | skb->len + sizeof(u16) > LCS_IOBUFFERSIZE) | |
1562 | /* skb too big for current tx buffer. */ | |
1563 | __lcs_emit_txbuffer(card); | |
1564 | if (card->tx_buffer == NULL) { | |
1565 | /* Get new tx buffer */ | |
1566 | card->tx_buffer = lcs_get_buffer(&card->write); | |
1567 | if (card->tx_buffer == NULL) { | |
1568 | card->stats.tx_dropped++; | |
0d613a27 FP |
1569 | rc = -EBUSY; |
1570 | goto out; | |
1da177e4 LT |
1571 | } |
1572 | card->tx_buffer->callback = lcs_txbuffer_cb; | |
1573 | card->tx_buffer->count = 0; | |
1574 | } | |
1575 | header = (struct lcs_header *) | |
1576 | (card->tx_buffer->data + card->tx_buffer->count); | |
1577 | card->tx_buffer->count += skb->len + sizeof(struct lcs_header); | |
1578 | header->offset = card->tx_buffer->count; | |
1579 | header->type = card->lan_type; | |
1580 | header->slot = card->portno; | |
1581 | memcpy(header + 1, skb->data, skb->len); | |
0d613a27 | 1582 | spin_unlock(&card->lock); |
1da177e4 LT |
1583 | card->stats.tx_bytes += skb->len; |
1584 | card->stats.tx_packets++; | |
1585 | dev_kfree_skb(skb); | |
0d613a27 FP |
1586 | netif_wake_queue(card->dev); |
1587 | spin_lock(&card->lock); | |
1588 | if (card->tx_emitted <= 0 && card->tx_buffer != NULL) | |
1da177e4 LT |
1589 | /* If this is the first tx buffer emit it immediately. */ |
1590 | __lcs_emit_txbuffer(card); | |
0d613a27 FP |
1591 | out: |
1592 | spin_unlock(&card->lock); | |
1593 | return rc; | |
1da177e4 LT |
1594 | } |
1595 | ||
1596 | static int | |
1597 | lcs_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1598 | { | |
1599 | struct lcs_card *card; | |
1600 | int rc; | |
1601 | ||
1602 | LCS_DBF_TEXT(5, trace, "pktxmit"); | |
1603 | card = (struct lcs_card *) dev->priv; | |
1da177e4 | 1604 | rc = __lcs_start_xmit(card, skb, dev); |
1da177e4 LT |
1605 | return rc; |
1606 | } | |
1607 | ||
1608 | /** | |
1609 | * send startlan and lanstat command to make LCS device ready | |
1610 | */ | |
1611 | static int | |
1612 | lcs_startlan_auto(struct lcs_card *card) | |
1613 | { | |
1614 | int rc; | |
1615 | ||
1616 | LCS_DBF_TEXT(2, trace, "strtauto"); | |
1617 | #ifdef CONFIG_NET_ETHERNET | |
1618 | card->lan_type = LCS_FRAME_TYPE_ENET; | |
1619 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1620 | if (rc == 0) | |
1621 | return 0; | |
1622 | ||
1623 | #endif | |
1624 | #ifdef CONFIG_TR | |
1625 | card->lan_type = LCS_FRAME_TYPE_TR; | |
1626 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1627 | if (rc == 0) | |
1628 | return 0; | |
1629 | #endif | |
1630 | #ifdef CONFIG_FDDI | |
1631 | card->lan_type = LCS_FRAME_TYPE_FDDI; | |
1632 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1633 | if (rc == 0) | |
1634 | return 0; | |
1635 | #endif | |
1636 | return -EIO; | |
1637 | } | |
1638 | ||
1639 | static int | |
1640 | lcs_startlan(struct lcs_card *card) | |
1641 | { | |
1642 | int rc, i; | |
1643 | ||
1644 | LCS_DBF_TEXT(2, trace, "startlan"); | |
1645 | rc = 0; | |
1646 | if (card->portno != LCS_INVALID_PORT_NO) { | |
1647 | if (card->lan_type == LCS_FRAME_TYPE_AUTO) | |
1648 | rc = lcs_startlan_auto(card); | |
1649 | else | |
1650 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1651 | } else { | |
1652 | for (i = 0; i <= 16; i++) { | |
1653 | card->portno = i; | |
1654 | if (card->lan_type != LCS_FRAME_TYPE_AUTO) | |
1655 | rc = lcs_send_startlan(card, | |
1656 | LCS_INITIATOR_TCPIP); | |
1657 | else | |
1658 | /* autodetecting lan type */ | |
1659 | rc = lcs_startlan_auto(card); | |
1660 | if (rc == 0) | |
1661 | break; | |
1662 | } | |
1663 | } | |
1664 | if (rc == 0) | |
1665 | return lcs_send_lanstat(card); | |
1666 | return rc; | |
1667 | } | |
1668 | ||
1669 | /** | |
1670 | * LCS detect function | |
1671 | * setup channels and make them I/O ready | |
1672 | */ | |
1673 | static int | |
1674 | lcs_detect(struct lcs_card *card) | |
1675 | { | |
1676 | int rc = 0; | |
1677 | ||
1678 | LCS_DBF_TEXT(2, setup, "lcsdetct"); | |
1679 | /* start/reset card */ | |
1680 | if (card->dev) | |
1681 | netif_stop_queue(card->dev); | |
1682 | rc = lcs_stop_channels(card); | |
1683 | if (rc == 0) { | |
1684 | rc = lcs_start_channels(card); | |
1685 | if (rc == 0) { | |
1686 | rc = lcs_send_startup(card, LCS_INITIATOR_TCPIP); | |
1687 | if (rc == 0) | |
1688 | rc = lcs_startlan(card); | |
1689 | } | |
1690 | } | |
1691 | if (rc == 0) { | |
1692 | card->state = DEV_STATE_UP; | |
1693 | } else { | |
1694 | card->state = DEV_STATE_DOWN; | |
1695 | card->write.state = CH_STATE_INIT; | |
1696 | card->read.state = CH_STATE_INIT; | |
1697 | } | |
1698 | return rc; | |
1699 | } | |
1700 | ||
1da177e4 LT |
1701 | /** |
1702 | * LCS Stop card | |
1703 | */ | |
1704 | static int | |
1705 | lcs_stopcard(struct lcs_card *card) | |
1706 | { | |
1707 | int rc; | |
1708 | ||
1709 | LCS_DBF_TEXT(3, setup, "stopcard"); | |
1710 | ||
1711 | if (card->read.state != CH_STATE_STOPPED && | |
1712 | card->write.state != CH_STATE_STOPPED && | |
1713 | card->state == DEV_STATE_UP) { | |
1714 | lcs_clear_multicast_list(card); | |
1715 | rc = lcs_send_stoplan(card,LCS_INITIATOR_TCPIP); | |
1716 | rc = lcs_send_shutdown(card); | |
1717 | } | |
1718 | rc = lcs_stop_channels(card); | |
1719 | card->state = DEV_STATE_DOWN; | |
1720 | ||
1721 | return rc; | |
1722 | } | |
1723 | ||
1da177e4 LT |
1724 | /** |
1725 | * Kernel Thread helper functions for LGW initiated commands | |
1726 | */ | |
1727 | static void | |
1728 | lcs_start_kernel_thread(struct lcs_card *card) | |
1729 | { | |
1730 | LCS_DBF_TEXT(5, trace, "krnthrd"); | |
27eb5ac8 KW |
1731 | if (lcs_do_start_thread(card, LCS_RECOVERY_THREAD)) |
1732 | kernel_thread(lcs_recovery, (void *) card, SIGCHLD); | |
1da177e4 LT |
1733 | #ifdef CONFIG_IP_MULTICAST |
1734 | if (lcs_do_start_thread(card, LCS_SET_MC_THREAD)) | |
e82b0f2c | 1735 | kernel_thread(lcs_register_mc_addresses, |
27eb5ac8 | 1736 | (void *) card, SIGCHLD); |
1da177e4 LT |
1737 | #endif |
1738 | } | |
1739 | ||
1740 | /** | |
1741 | * Process control frames. | |
1742 | */ | |
1743 | static void | |
1744 | lcs_get_control(struct lcs_card *card, struct lcs_cmd *cmd) | |
1745 | { | |
1746 | LCS_DBF_TEXT(5, trace, "getctrl"); | |
1747 | if (cmd->initiator == LCS_INITIATOR_LGW) { | |
1748 | switch(cmd->cmd_code) { | |
1749 | case LCS_CMD_STARTUP: | |
1da177e4 | 1750 | case LCS_CMD_STARTLAN: |
27eb5ac8 | 1751 | lcs_schedule_recovery(card); |
1da177e4 LT |
1752 | break; |
1753 | case LCS_CMD_STOPLAN: | |
27eb5ac8 KW |
1754 | PRINT_WARN("Stoplan for %s initiated by LGW.\n", |
1755 | card->dev->name); | |
1756 | if (card->dev) | |
1757 | netif_carrier_off(card->dev); | |
1da177e4 LT |
1758 | break; |
1759 | default: | |
1760 | PRINT_INFO("UNRECOGNIZED LGW COMMAND\n"); | |
1761 | break; | |
1762 | } | |
1763 | } else | |
1764 | lcs_notify_lancmd_waiters(card, cmd); | |
1765 | } | |
1766 | ||
1767 | /** | |
1768 | * Unpack network packet. | |
1769 | */ | |
1770 | static void | |
1771 | lcs_get_skb(struct lcs_card *card, char *skb_data, unsigned int skb_len) | |
1772 | { | |
1773 | struct sk_buff *skb; | |
1774 | ||
1775 | LCS_DBF_TEXT(5, trace, "getskb"); | |
1776 | if (card->dev == NULL || | |
1777 | card->state != DEV_STATE_UP) | |
1778 | /* The card isn't up. Ignore the packet. */ | |
1779 | return; | |
1780 | ||
1781 | skb = dev_alloc_skb(skb_len); | |
1782 | if (skb == NULL) { | |
1783 | PRINT_ERR("LCS: alloc_skb failed for device=%s\n", | |
1784 | card->dev->name); | |
1785 | card->stats.rx_dropped++; | |
1786 | return; | |
1787 | } | |
1788 | skb->dev = card->dev; | |
1789 | memcpy(skb_put(skb, skb_len), skb_data, skb_len); | |
1790 | skb->protocol = card->lan_type_trans(skb, card->dev); | |
1791 | card->stats.rx_bytes += skb_len; | |
1792 | card->stats.rx_packets++; | |
1793 | *((__u32 *)skb->cb) = ++card->pkt_seq; | |
1794 | netif_rx(skb); | |
1795 | } | |
1796 | ||
1797 | /** | |
1798 | * LCS main routine to get packets and lancmd replies from the buffers | |
1799 | */ | |
1800 | static void | |
1801 | lcs_get_frames_cb(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
1802 | { | |
1803 | struct lcs_card *card; | |
1804 | struct lcs_header *lcs_hdr; | |
1805 | __u16 offset; | |
1806 | ||
1807 | LCS_DBF_TEXT(5, trace, "lcsgtpkt"); | |
1808 | lcs_hdr = (struct lcs_header *) buffer->data; | |
1809 | if (lcs_hdr->offset == LCS_ILLEGAL_OFFSET) { | |
1810 | LCS_DBF_TEXT(4, trace, "-eiogpkt"); | |
1811 | return; | |
1812 | } | |
1813 | card = (struct lcs_card *) | |
1814 | ((char *) channel - offsetof(struct lcs_card, read)); | |
1815 | offset = 0; | |
1816 | while (lcs_hdr->offset != 0) { | |
1817 | if (lcs_hdr->offset <= 0 || | |
1818 | lcs_hdr->offset > LCS_IOBUFFERSIZE || | |
1819 | lcs_hdr->offset < offset) { | |
1820 | /* Offset invalid. */ | |
1821 | card->stats.rx_length_errors++; | |
1822 | card->stats.rx_errors++; | |
1823 | return; | |
1824 | } | |
1825 | /* What kind of frame is it? */ | |
1826 | if (lcs_hdr->type == LCS_FRAME_TYPE_CONTROL) | |
1827 | /* Control frame. */ | |
1828 | lcs_get_control(card, (struct lcs_cmd *) lcs_hdr); | |
1829 | else if (lcs_hdr->type == LCS_FRAME_TYPE_ENET || | |
1830 | lcs_hdr->type == LCS_FRAME_TYPE_TR || | |
1831 | lcs_hdr->type == LCS_FRAME_TYPE_FDDI) | |
1832 | /* Normal network packet. */ | |
1833 | lcs_get_skb(card, (char *)(lcs_hdr + 1), | |
1834 | lcs_hdr->offset - offset - | |
1835 | sizeof(struct lcs_header)); | |
1836 | else | |
1837 | /* Unknown frame type. */ | |
1838 | ; // FIXME: error message ? | |
1839 | /* Proceed to next frame. */ | |
1840 | offset = lcs_hdr->offset; | |
1841 | lcs_hdr->offset = LCS_ILLEGAL_OFFSET; | |
1842 | lcs_hdr = (struct lcs_header *) (buffer->data + offset); | |
1843 | } | |
1844 | /* The buffer is now empty. Make it ready again. */ | |
1845 | lcs_ready_buffer(&card->read, buffer); | |
1846 | } | |
1847 | ||
1848 | /** | |
1849 | * get network statistics for ifconfig and other user programs | |
1850 | */ | |
1851 | static struct net_device_stats * | |
1852 | lcs_getstats(struct net_device *dev) | |
1853 | { | |
1854 | struct lcs_card *card; | |
1855 | ||
1856 | LCS_DBF_TEXT(4, trace, "netstats"); | |
1857 | card = (struct lcs_card *) dev->priv; | |
1858 | return &card->stats; | |
1859 | } | |
1860 | ||
1861 | /** | |
1862 | * stop lcs device | |
1863 | * This function will be called by user doing ifconfig xxx down | |
1864 | */ | |
1865 | static int | |
1866 | lcs_stop_device(struct net_device *dev) | |
1867 | { | |
1868 | struct lcs_card *card; | |
1869 | int rc; | |
1870 | ||
1871 | LCS_DBF_TEXT(2, trace, "stopdev"); | |
1872 | card = (struct lcs_card *) dev->priv; | |
27eb5ac8 KW |
1873 | netif_carrier_off(dev); |
1874 | netif_tx_disable(dev); | |
1da177e4 | 1875 | dev->flags &= ~IFF_UP; |
27eb5ac8 KW |
1876 | wait_event(card->write.wait_q, |
1877 | (card->write.state != CH_STATE_RUNNING)); | |
1da177e4 LT |
1878 | rc = lcs_stopcard(card); |
1879 | if (rc) | |
1880 | PRINT_ERR("Try it again!\n "); | |
1881 | return rc; | |
1882 | } | |
1883 | ||
1884 | /** | |
1885 | * start lcs device and make it runnable | |
1886 | * This function will be called by user doing ifconfig xxx up | |
1887 | */ | |
1888 | static int | |
1889 | lcs_open_device(struct net_device *dev) | |
1890 | { | |
1891 | struct lcs_card *card; | |
1892 | int rc; | |
1893 | ||
1894 | LCS_DBF_TEXT(2, trace, "opendev"); | |
1895 | card = (struct lcs_card *) dev->priv; | |
1896 | /* initialize statistics */ | |
1897 | rc = lcs_detect(card); | |
1898 | if (rc) { | |
1899 | PRINT_ERR("LCS:Error in opening device!\n"); | |
1900 | ||
1901 | } else { | |
1902 | dev->flags |= IFF_UP; | |
27eb5ac8 | 1903 | netif_carrier_on(dev); |
1da177e4 LT |
1904 | netif_wake_queue(dev); |
1905 | card->state = DEV_STATE_UP; | |
1906 | } | |
1907 | return rc; | |
1908 | } | |
1909 | ||
1910 | /** | |
1911 | * show function for portno called by cat or similar things | |
1912 | */ | |
1913 | static ssize_t | |
3fd3c0a5 | 1914 | lcs_portno_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1915 | { |
1916 | struct lcs_card *card; | |
1917 | ||
1918 | card = (struct lcs_card *)dev->driver_data; | |
1919 | ||
1920 | if (!card) | |
1921 | return 0; | |
1922 | ||
1923 | return sprintf(buf, "%d\n", card->portno); | |
1924 | } | |
1925 | ||
1926 | /** | |
1927 | * store the value which is piped to file portno | |
1928 | */ | |
1929 | static ssize_t | |
3fd3c0a5 | 1930 | lcs_portno_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1931 | { |
1932 | struct lcs_card *card; | |
1933 | int value; | |
1934 | ||
1935 | card = (struct lcs_card *)dev->driver_data; | |
1936 | ||
1937 | if (!card) | |
1938 | return 0; | |
1939 | ||
1940 | sscanf(buf, "%u", &value); | |
1941 | /* TODO: sanity checks */ | |
1942 | card->portno = value; | |
1943 | ||
1944 | return count; | |
1945 | ||
1946 | } | |
1947 | ||
1948 | static DEVICE_ATTR(portno, 0644, lcs_portno_show, lcs_portno_store); | |
1949 | ||
1950 | static ssize_t | |
3fd3c0a5 | 1951 | lcs_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1952 | { |
1953 | struct ccwgroup_device *cgdev; | |
1954 | ||
1955 | cgdev = to_ccwgroupdev(dev); | |
1956 | if (!cgdev) | |
1957 | return -ENODEV; | |
1958 | ||
1959 | return sprintf(buf, "%s\n", cu3088_type[cgdev->cdev[0]->id.driver_info]); | |
1960 | } | |
1961 | ||
1962 | static DEVICE_ATTR(type, 0444, lcs_type_show, NULL); | |
1963 | ||
1964 | static ssize_t | |
3fd3c0a5 | 1965 | lcs_timeout_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1966 | { |
1967 | struct lcs_card *card; | |
1968 | ||
1969 | card = (struct lcs_card *)dev->driver_data; | |
1970 | ||
1971 | return card ? sprintf(buf, "%u\n", card->lancmd_timeout) : 0; | |
1972 | } | |
1973 | ||
1974 | static ssize_t | |
3fd3c0a5 | 1975 | lcs_timeout_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1976 | { |
1977 | struct lcs_card *card; | |
1978 | int value; | |
1979 | ||
1980 | card = (struct lcs_card *)dev->driver_data; | |
1981 | ||
1982 | if (!card) | |
1983 | return 0; | |
1984 | ||
1985 | sscanf(buf, "%u", &value); | |
1986 | /* TODO: sanity checks */ | |
1987 | card->lancmd_timeout = value; | |
1988 | ||
1989 | return count; | |
1990 | ||
1991 | } | |
1992 | ||
1993 | DEVICE_ATTR(lancmd_timeout, 0644, lcs_timeout_show, lcs_timeout_store); | |
1994 | ||
27eb5ac8 | 1995 | static ssize_t |
e82b0f2c | 1996 | lcs_dev_recover_store(struct device *dev, struct device_attribute *attr, |
27eb5ac8 KW |
1997 | const char *buf, size_t count) |
1998 | { | |
1999 | struct lcs_card *card = dev->driver_data; | |
2000 | char *tmp; | |
2001 | int i; | |
2002 | ||
2003 | if (!card) | |
2004 | return -EINVAL; | |
2005 | if (card->state != DEV_STATE_UP) | |
2006 | return -EPERM; | |
2007 | i = simple_strtoul(buf, &tmp, 16); | |
2008 | if (i == 1) | |
2009 | lcs_schedule_recovery(card); | |
2010 | return count; | |
2011 | } | |
2012 | ||
2013 | static DEVICE_ATTR(recover, 0200, NULL, lcs_dev_recover_store); | |
2014 | ||
1da177e4 LT |
2015 | static struct attribute * lcs_attrs[] = { |
2016 | &dev_attr_portno.attr, | |
2017 | &dev_attr_type.attr, | |
2018 | &dev_attr_lancmd_timeout.attr, | |
27eb5ac8 | 2019 | &dev_attr_recover.attr, |
1da177e4 LT |
2020 | NULL, |
2021 | }; | |
2022 | ||
2023 | static struct attribute_group lcs_attr_group = { | |
2024 | .attrs = lcs_attrs, | |
2025 | }; | |
2026 | ||
2027 | /** | |
2028 | * lcs_probe_device is called on establishing a new ccwgroup_device. | |
2029 | */ | |
2030 | static int | |
2031 | lcs_probe_device(struct ccwgroup_device *ccwgdev) | |
2032 | { | |
2033 | struct lcs_card *card; | |
2034 | int ret; | |
2035 | ||
2036 | if (!get_device(&ccwgdev->dev)) | |
2037 | return -ENODEV; | |
2038 | ||
2039 | LCS_DBF_TEXT(2, setup, "add_dev"); | |
2040 | card = lcs_alloc_card(); | |
2041 | if (!card) { | |
2042 | PRINT_ERR("Allocation of lcs card failed\n"); | |
2043 | put_device(&ccwgdev->dev); | |
2044 | return -ENOMEM; | |
2045 | } | |
2046 | ret = sysfs_create_group(&ccwgdev->dev.kobj, &lcs_attr_group); | |
2047 | if (ret) { | |
2048 | PRINT_ERR("Creating attributes failed"); | |
2049 | lcs_free_card(card); | |
2050 | put_device(&ccwgdev->dev); | |
2051 | return ret; | |
2052 | } | |
2053 | ccwgdev->dev.driver_data = card; | |
2054 | ccwgdev->cdev[0]->handler = lcs_irq; | |
2055 | ccwgdev->cdev[1]->handler = lcs_irq; | |
27eb5ac8 KW |
2056 | card->gdev = ccwgdev; |
2057 | INIT_WORK(&card->kernel_thread_starter, | |
2058 | (void *) lcs_start_kernel_thread, card); | |
2059 | card->thread_start_mask = 0; | |
2060 | card->thread_allowed_mask = 0; | |
2061 | card->thread_running_mask = 0; | |
1da177e4 LT |
2062 | return 0; |
2063 | } | |
2064 | ||
2065 | static int | |
2066 | lcs_register_netdev(struct ccwgroup_device *ccwgdev) | |
2067 | { | |
2068 | struct lcs_card *card; | |
2069 | ||
2070 | LCS_DBF_TEXT(2, setup, "regnetdv"); | |
2071 | card = (struct lcs_card *)ccwgdev->dev.driver_data; | |
2072 | if (card->dev->reg_state != NETREG_UNINITIALIZED) | |
2073 | return 0; | |
2074 | SET_NETDEV_DEV(card->dev, &ccwgdev->dev); | |
2075 | return register_netdev(card->dev); | |
2076 | } | |
2077 | ||
2078 | /** | |
2079 | * lcs_new_device will be called by setting the group device online. | |
2080 | */ | |
2081 | ||
2082 | static int | |
2083 | lcs_new_device(struct ccwgroup_device *ccwgdev) | |
2084 | { | |
2085 | struct lcs_card *card; | |
2086 | struct net_device *dev=NULL; | |
2087 | enum lcs_dev_states recover_state; | |
2088 | int rc; | |
2089 | ||
2090 | card = (struct lcs_card *)ccwgdev->dev.driver_data; | |
2091 | if (!card) | |
2092 | return -ENODEV; | |
2093 | ||
2094 | LCS_DBF_TEXT(2, setup, "newdev"); | |
2095 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2096 | card->read.ccwdev = ccwgdev->cdev[0]; | |
2097 | card->write.ccwdev = ccwgdev->cdev[1]; | |
2098 | ||
2099 | recover_state = card->state; | |
2100 | ccw_device_set_online(card->read.ccwdev); | |
2101 | ccw_device_set_online(card->write.ccwdev); | |
2102 | ||
2103 | LCS_DBF_TEXT(3, setup, "lcsnewdv"); | |
2104 | ||
2105 | lcs_setup_card(card); | |
2106 | rc = lcs_detect(card); | |
2107 | if (rc) { | |
2108 | LCS_DBF_TEXT(2, setup, "dtctfail"); | |
2109 | PRINT_WARN("Detection of LCS card failed with return code " | |
2110 | "%d (0x%x)\n", rc, rc); | |
2111 | lcs_stopcard(card); | |
2112 | goto out; | |
2113 | } | |
2114 | if (card->dev) { | |
2115 | LCS_DBF_TEXT(2, setup, "samedev"); | |
2116 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2117 | goto netdev_out; | |
2118 | } | |
2119 | switch (card->lan_type) { | |
2120 | #ifdef CONFIG_NET_ETHERNET | |
2121 | case LCS_FRAME_TYPE_ENET: | |
2122 | card->lan_type_trans = eth_type_trans; | |
2123 | dev = alloc_etherdev(0); | |
2124 | break; | |
2125 | #endif | |
2126 | #ifdef CONFIG_TR | |
2127 | case LCS_FRAME_TYPE_TR: | |
2128 | card->lan_type_trans = tr_type_trans; | |
2129 | dev = alloc_trdev(0); | |
2130 | break; | |
2131 | #endif | |
2132 | #ifdef CONFIG_FDDI | |
2133 | case LCS_FRAME_TYPE_FDDI: | |
2134 | card->lan_type_trans = fddi_type_trans; | |
2135 | dev = alloc_fddidev(0); | |
2136 | break; | |
2137 | #endif | |
2138 | default: | |
2139 | LCS_DBF_TEXT(3, setup, "errinit"); | |
2140 | PRINT_ERR("LCS: Initialization failed\n"); | |
2141 | PRINT_ERR("LCS: No device found!\n"); | |
2142 | goto out; | |
2143 | } | |
2144 | if (!dev) | |
2145 | goto out; | |
2146 | card->dev = dev; | |
1da177e4 LT |
2147 | card->dev->priv = card; |
2148 | card->dev->open = lcs_open_device; | |
2149 | card->dev->stop = lcs_stop_device; | |
2150 | card->dev->hard_start_xmit = lcs_start_xmit; | |
2151 | card->dev->get_stats = lcs_getstats; | |
2152 | SET_MODULE_OWNER(dev); | |
1da177e4 LT |
2153 | memcpy(card->dev->dev_addr, card->mac, LCS_MAC_LENGTH); |
2154 | #ifdef CONFIG_IP_MULTICAST | |
2155 | if (!lcs_check_multicast_support(card)) | |
2156 | card->dev->set_multicast_list = lcs_set_multicast_list; | |
2157 | #endif | |
b5f9d55b | 2158 | netdev_out: |
1da177e4 LT |
2159 | lcs_set_allowed_threads(card,0xffffffff); |
2160 | if (recover_state == DEV_STATE_RECOVER) { | |
2161 | lcs_set_multicast_list(card->dev); | |
2162 | card->dev->flags |= IFF_UP; | |
27eb5ac8 | 2163 | netif_carrier_on(card->dev); |
1da177e4 LT |
2164 | netif_wake_queue(card->dev); |
2165 | card->state = DEV_STATE_UP; | |
b5f9d55b | 2166 | } else { |
1da177e4 | 2167 | lcs_stopcard(card); |
b5f9d55b | 2168 | } |
1da177e4 | 2169 | |
b5f9d55b FP |
2170 | if (lcs_register_netdev(ccwgdev) != 0) |
2171 | goto out; | |
2172 | ||
2173 | /* Print out supported assists: IPv6 */ | |
2174 | PRINT_INFO("LCS device %s %s IPv6 support\n", card->dev->name, | |
2175 | (card->ip_assists_supported & LCS_IPASS_IPV6_SUPPORT) ? | |
2176 | "with" : "without"); | |
2177 | /* Print out supported assist: Multicast */ | |
2178 | PRINT_INFO("LCS device %s %s Multicast support\n", card->dev->name, | |
2179 | (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) ? | |
2180 | "with" : "without"); | |
1da177e4 LT |
2181 | return 0; |
2182 | out: | |
2183 | ||
2184 | ccw_device_set_offline(card->read.ccwdev); | |
2185 | ccw_device_set_offline(card->write.ccwdev); | |
2186 | return -ENODEV; | |
2187 | } | |
2188 | ||
2189 | /** | |
2190 | * lcs_shutdown_device, called when setting the group device offline. | |
2191 | */ | |
2192 | static int | |
27eb5ac8 | 2193 | __lcs_shutdown_device(struct ccwgroup_device *ccwgdev, int recovery_mode) |
1da177e4 LT |
2194 | { |
2195 | struct lcs_card *card; | |
2196 | enum lcs_dev_states recover_state; | |
2197 | int ret; | |
2198 | ||
2199 | LCS_DBF_TEXT(3, setup, "shtdndev"); | |
2200 | card = (struct lcs_card *)ccwgdev->dev.driver_data; | |
2201 | if (!card) | |
2202 | return -ENODEV; | |
27eb5ac8 KW |
2203 | if (recovery_mode == 0) { |
2204 | lcs_set_allowed_threads(card, 0); | |
2205 | if (lcs_wait_for_threads(card, LCS_SET_MC_THREAD)) | |
2206 | return -ERESTARTSYS; | |
2207 | } | |
1da177e4 LT |
2208 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); |
2209 | recover_state = card->state; | |
2210 | ||
2211 | ret = lcs_stop_device(card->dev); | |
2212 | ret = ccw_device_set_offline(card->read.ccwdev); | |
2213 | ret = ccw_device_set_offline(card->write.ccwdev); | |
2214 | if (recover_state == DEV_STATE_UP) { | |
2215 | card->state = DEV_STATE_RECOVER; | |
2216 | } | |
2217 | if (ret) | |
2218 | return ret; | |
2219 | return 0; | |
2220 | } | |
2221 | ||
27eb5ac8 KW |
2222 | static int |
2223 | lcs_shutdown_device(struct ccwgroup_device *ccwgdev) | |
2224 | { | |
2225 | return __lcs_shutdown_device(ccwgdev, 0); | |
2226 | } | |
2227 | ||
2228 | /** | |
2229 | * drive lcs recovery after startup and startlan initiated by Lan Gateway | |
2230 | */ | |
2231 | static int | |
2232 | lcs_recovery(void *ptr) | |
2233 | { | |
2234 | struct lcs_card *card; | |
2235 | struct ccwgroup_device *gdev; | |
2236 | int rc; | |
2237 | ||
2238 | card = (struct lcs_card *) ptr; | |
2239 | daemonize("lcs_recover"); | |
2240 | ||
2241 | LCS_DBF_TEXT(4, trace, "recover1"); | |
2242 | if (!lcs_do_run_thread(card, LCS_RECOVERY_THREAD)) | |
2243 | return 0; | |
2244 | LCS_DBF_TEXT(4, trace, "recover2"); | |
2245 | gdev = card->gdev; | |
2246 | PRINT_WARN("Recovery of device %s started...\n", gdev->dev.bus_id); | |
2247 | rc = __lcs_shutdown_device(gdev, 1); | |
2248 | rc = lcs_new_device(gdev); | |
2249 | if (!rc) | |
2250 | PRINT_INFO("Device %s successfully recovered!\n", | |
2251 | card->dev->name); | |
2252 | else | |
2253 | PRINT_INFO("Device %s could not be recovered!\n", | |
2254 | card->dev->name); | |
2255 | lcs_clear_thread_running_bit(card, LCS_RECOVERY_THREAD); | |
2256 | return 0; | |
2257 | } | |
2258 | ||
1da177e4 LT |
2259 | /** |
2260 | * lcs_remove_device, free buffers and card | |
2261 | */ | |
2262 | static void | |
2263 | lcs_remove_device(struct ccwgroup_device *ccwgdev) | |
2264 | { | |
2265 | struct lcs_card *card; | |
2266 | ||
2267 | card = (struct lcs_card *)ccwgdev->dev.driver_data; | |
2268 | if (!card) | |
2269 | return; | |
2270 | ||
2271 | PRINT_INFO("Removing lcs group device ....\n"); | |
2272 | LCS_DBF_TEXT(3, setup, "remdev"); | |
2273 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2274 | if (ccwgdev->state == CCWGROUP_ONLINE) { | |
2275 | lcs_shutdown_device(ccwgdev); | |
2276 | } | |
2277 | if (card->dev) | |
2278 | unregister_netdev(card->dev); | |
2279 | sysfs_remove_group(&ccwgdev->dev.kobj, &lcs_attr_group); | |
2280 | lcs_cleanup_card(card); | |
2281 | lcs_free_card(card); | |
2282 | put_device(&ccwgdev->dev); | |
2283 | } | |
2284 | ||
2285 | /** | |
2286 | * LCS ccwgroup driver registration | |
2287 | */ | |
2288 | static struct ccwgroup_driver lcs_group_driver = { | |
2289 | .owner = THIS_MODULE, | |
2290 | .name = "lcs", | |
2291 | .max_slaves = 2, | |
2292 | .driver_id = 0xD3C3E2, | |
2293 | .probe = lcs_probe_device, | |
2294 | .remove = lcs_remove_device, | |
2295 | .set_online = lcs_new_device, | |
2296 | .set_offline = lcs_shutdown_device, | |
2297 | }; | |
2298 | ||
2299 | /** | |
2300 | * LCS Module/Kernel initialization function | |
2301 | */ | |
2302 | static int | |
2303 | __init lcs_init_module(void) | |
2304 | { | |
2305 | int rc; | |
2306 | ||
2307 | PRINT_INFO("Loading %s\n",version); | |
2308 | rc = lcs_register_debug_facility(); | |
2309 | LCS_DBF_TEXT(0, setup, "lcsinit"); | |
2310 | if (rc) { | |
2311 | PRINT_ERR("Initialization failed\n"); | |
2312 | return rc; | |
2313 | } | |
2314 | ||
2315 | rc = register_cu3088_discipline(&lcs_group_driver); | |
2316 | if (rc) { | |
2317 | PRINT_ERR("Initialization failed\n"); | |
2318 | return rc; | |
2319 | } | |
1da177e4 LT |
2320 | return 0; |
2321 | } | |
2322 | ||
2323 | ||
2324 | /** | |
2325 | * LCS module cleanup function | |
2326 | */ | |
2327 | static void | |
2328 | __exit lcs_cleanup_module(void) | |
2329 | { | |
2330 | PRINT_INFO("Terminating lcs module.\n"); | |
2331 | LCS_DBF_TEXT(0, trace, "cleanup"); | |
2332 | unregister_cu3088_discipline(&lcs_group_driver); | |
2333 | lcs_unregister_debug_facility(); | |
2334 | } | |
2335 | ||
2336 | module_init(lcs_init_module); | |
2337 | module_exit(lcs_cleanup_module); | |
2338 | ||
1387780f | 2339 | MODULE_AUTHOR("Frank Pavlic <fpavlic@de.ibm.com>"); |
1da177e4 LT |
2340 | MODULE_LICENSE("GPL"); |
2341 |