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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Linux for S/390 Lan Channel Station Network Driver |
3 | * | |
cbb2aec3 KDW |
4 | * Copyright IBM Corp. 1999, 2009 |
5 | * Author(s): Original Code written by | |
6 | * DJ Barrow <djbarrow@de.ibm.com,barrow_dj@yahoo.com> | |
7 | * Rewritten by | |
8 | * Frank Pavlic <fpavlic@de.ibm.com> and | |
9 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
1da177e4 | 10 | * |
1da177e4 LT |
11 | * This program is free software; you can redistribute it and/or modify |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2, or (at your option) | |
14 | * any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | */ | |
25 | ||
c99fc5da KW |
26 | #define KMSG_COMPONENT "lcs" |
27 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
28 | ||
1da177e4 LT |
29 | #include <linux/module.h> |
30 | #include <linux/if.h> | |
31 | #include <linux/netdevice.h> | |
32 | #include <linux/etherdevice.h> | |
1da177e4 LT |
33 | #include <linux/fddidevice.h> |
34 | #include <linux/inetdevice.h> | |
35 | #include <linux/in.h> | |
36 | #include <linux/igmp.h> | |
37 | #include <linux/delay.h> | |
e5b5719b | 38 | #include <linux/kthread.h> |
5a0e3ad6 | 39 | #include <linux/slab.h> |
1da177e4 LT |
40 | #include <net/arp.h> |
41 | #include <net/ip.h> | |
42 | ||
43 | #include <asm/debug.h> | |
44 | #include <asm/idals.h> | |
45 | #include <asm/timex.h> | |
46 | #include <linux/device.h> | |
47 | #include <asm/ccwgroup.h> | |
48 | ||
49 | #include "lcs.h" | |
1da177e4 LT |
50 | |
51 | ||
1abd2296 | 52 | #if !defined(CONFIG_ETHERNET) && !defined(CONFIG_FDDI) |
1da177e4 LT |
53 | #error Cannot compile lcs.c without some net devices switched on. |
54 | #endif | |
55 | ||
56 | /** | |
57 | * initialization string for output | |
58 | */ | |
1da177e4 | 59 | |
e018ba1f | 60 | static char version[] __initdata = "LCS driver"; |
0ca8cc6f UB |
61 | |
62 | /** | |
63 | * the root device for lcs group devices | |
64 | */ | |
65 | static struct device *lcs_root_dev; | |
1da177e4 LT |
66 | |
67 | /** | |
68 | * Some prototypes. | |
69 | */ | |
70 | static void lcs_tasklet(unsigned long); | |
4927b3f7 | 71 | static void lcs_start_kernel_thread(struct work_struct *); |
1da177e4 | 72 | static void lcs_get_frames_cb(struct lcs_channel *, struct lcs_buffer *); |
801599b0 | 73 | #ifdef CONFIG_IP_MULTICAST |
1da177e4 | 74 | static int lcs_send_delipm(struct lcs_card *, struct lcs_ipm_list *); |
801599b0 | 75 | #endif /* CONFIG_IP_MULTICAST */ |
27eb5ac8 | 76 | static int lcs_recovery(void *ptr); |
1da177e4 LT |
77 | |
78 | /** | |
79 | * Debug Facility Stuff | |
80 | */ | |
0ca8cc6f | 81 | static char debug_buffer[255]; |
1da177e4 LT |
82 | static debug_info_t *lcs_dbf_setup; |
83 | static debug_info_t *lcs_dbf_trace; | |
84 | ||
85 | /** | |
86 | * LCS Debug Facility functions | |
87 | */ | |
88 | static void | |
89 | lcs_unregister_debug_facility(void) | |
90 | { | |
91 | if (lcs_dbf_setup) | |
92 | debug_unregister(lcs_dbf_setup); | |
93 | if (lcs_dbf_trace) | |
94 | debug_unregister(lcs_dbf_trace); | |
95 | } | |
96 | ||
97 | static int | |
98 | lcs_register_debug_facility(void) | |
99 | { | |
66a464db | 100 | lcs_dbf_setup = debug_register("lcs_setup", 2, 1, 8); |
164b0fb1 | 101 | lcs_dbf_trace = debug_register("lcs_trace", 4, 1, 8); |
1da177e4 | 102 | if (lcs_dbf_setup == NULL || lcs_dbf_trace == NULL) { |
c99fc5da | 103 | pr_err("Not enough memory for debug facility.\n"); |
1da177e4 LT |
104 | lcs_unregister_debug_facility(); |
105 | return -ENOMEM; | |
106 | } | |
107 | debug_register_view(lcs_dbf_setup, &debug_hex_ascii_view); | |
0d613a27 | 108 | debug_set_level(lcs_dbf_setup, 2); |
1da177e4 | 109 | debug_register_view(lcs_dbf_trace, &debug_hex_ascii_view); |
0d613a27 | 110 | debug_set_level(lcs_dbf_trace, 2); |
1da177e4 LT |
111 | return 0; |
112 | } | |
113 | ||
114 | /** | |
115 | * Allocate io buffers. | |
116 | */ | |
117 | static int | |
118 | lcs_alloc_channel(struct lcs_channel *channel) | |
119 | { | |
120 | int cnt; | |
121 | ||
122 | LCS_DBF_TEXT(2, setup, "ichalloc"); | |
123 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
124 | /* alloc memory fo iobuffer */ | |
88abaab4 ES |
125 | channel->iob[cnt].data = |
126 | kzalloc(LCS_IOBUFFERSIZE, GFP_DMA | GFP_KERNEL); | |
1da177e4 LT |
127 | if (channel->iob[cnt].data == NULL) |
128 | break; | |
9163bb2e | 129 | channel->iob[cnt].state = LCS_BUF_STATE_EMPTY; |
1da177e4 LT |
130 | } |
131 | if (cnt < LCS_NUM_BUFFS) { | |
132 | /* Not all io buffers could be allocated. */ | |
133 | LCS_DBF_TEXT(2, setup, "echalloc"); | |
134 | while (cnt-- > 0) | |
135 | kfree(channel->iob[cnt].data); | |
136 | return -ENOMEM; | |
137 | } | |
138 | return 0; | |
139 | } | |
140 | ||
141 | /** | |
142 | * Free io buffers. | |
143 | */ | |
144 | static void | |
145 | lcs_free_channel(struct lcs_channel *channel) | |
146 | { | |
147 | int cnt; | |
148 | ||
149 | LCS_DBF_TEXT(2, setup, "ichfree"); | |
150 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
17fd682e | 151 | kfree(channel->iob[cnt].data); |
1da177e4 LT |
152 | channel->iob[cnt].data = NULL; |
153 | } | |
154 | } | |
155 | ||
156 | /* | |
157 | * Cleanup channel. | |
158 | */ | |
159 | static void | |
160 | lcs_cleanup_channel(struct lcs_channel *channel) | |
161 | { | |
162 | LCS_DBF_TEXT(3, setup, "cleanch"); | |
163 | /* Kill write channel tasklets. */ | |
164 | tasklet_kill(&channel->irq_tasklet); | |
165 | /* Free channel buffers. */ | |
166 | lcs_free_channel(channel); | |
167 | } | |
168 | ||
169 | /** | |
170 | * LCS free memory for card and channels. | |
171 | */ | |
172 | static void | |
173 | lcs_free_card(struct lcs_card *card) | |
174 | { | |
175 | LCS_DBF_TEXT(2, setup, "remcard"); | |
176 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
177 | kfree(card); | |
178 | } | |
179 | ||
180 | /** | |
181 | * LCS alloc memory for card and channels | |
182 | */ | |
183 | static struct lcs_card * | |
184 | lcs_alloc_card(void) | |
185 | { | |
186 | struct lcs_card *card; | |
187 | int rc; | |
188 | ||
189 | LCS_DBF_TEXT(2, setup, "alloclcs"); | |
190 | ||
88abaab4 | 191 | card = kzalloc(sizeof(struct lcs_card), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
192 | if (card == NULL) |
193 | return NULL; | |
1da177e4 LT |
194 | card->lan_type = LCS_FRAME_TYPE_AUTO; |
195 | card->pkt_seq = 0; | |
196 | card->lancmd_timeout = LCS_LANCMD_TIMEOUT_DEFAULT; | |
197 | /* Allocate io buffers for the read channel. */ | |
198 | rc = lcs_alloc_channel(&card->read); | |
199 | if (rc){ | |
200 | LCS_DBF_TEXT(2, setup, "iccwerr"); | |
201 | lcs_free_card(card); | |
202 | return NULL; | |
203 | } | |
204 | /* Allocate io buffers for the write channel. */ | |
205 | rc = lcs_alloc_channel(&card->write); | |
206 | if (rc) { | |
207 | LCS_DBF_TEXT(2, setup, "iccwerr"); | |
208 | lcs_cleanup_channel(&card->read); | |
209 | lcs_free_card(card); | |
210 | return NULL; | |
211 | } | |
212 | ||
213 | #ifdef CONFIG_IP_MULTICAST | |
214 | INIT_LIST_HEAD(&card->ipm_list); | |
215 | #endif | |
216 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
217 | return card; | |
218 | } | |
219 | ||
220 | /* | |
221 | * Setup read channel. | |
222 | */ | |
223 | static void | |
224 | lcs_setup_read_ccws(struct lcs_card *card) | |
225 | { | |
226 | int cnt; | |
227 | ||
228 | LCS_DBF_TEXT(2, setup, "ireadccw"); | |
229 | /* Setup read ccws. */ | |
230 | memset(card->read.ccws, 0, sizeof (struct ccw1) * (LCS_NUM_BUFFS + 1)); | |
231 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
232 | card->read.ccws[cnt].cmd_code = LCS_CCW_READ; | |
233 | card->read.ccws[cnt].count = LCS_IOBUFFERSIZE; | |
234 | card->read.ccws[cnt].flags = | |
235 | CCW_FLAG_CC | CCW_FLAG_SLI | CCW_FLAG_PCI; | |
236 | /* | |
237 | * Note: we have allocated the buffer with GFP_DMA, so | |
238 | * we do not need to do set_normalized_cda. | |
239 | */ | |
240 | card->read.ccws[cnt].cda = | |
241 | (__u32) __pa(card->read.iob[cnt].data); | |
242 | ((struct lcs_header *) | |
243 | card->read.iob[cnt].data)->offset = LCS_ILLEGAL_OFFSET; | |
244 | card->read.iob[cnt].callback = lcs_get_frames_cb; | |
9163bb2e | 245 | card->read.iob[cnt].state = LCS_BUF_STATE_READY; |
1da177e4 LT |
246 | card->read.iob[cnt].count = LCS_IOBUFFERSIZE; |
247 | } | |
248 | card->read.ccws[0].flags &= ~CCW_FLAG_PCI; | |
249 | card->read.ccws[LCS_NUM_BUFFS - 1].flags &= ~CCW_FLAG_PCI; | |
250 | card->read.ccws[LCS_NUM_BUFFS - 1].flags |= CCW_FLAG_SUSPEND; | |
251 | /* Last ccw is a tic (transfer in channel). */ | |
252 | card->read.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER; | |
253 | card->read.ccws[LCS_NUM_BUFFS].cda = | |
254 | (__u32) __pa(card->read.ccws); | |
255 | /* Setg initial state of the read channel. */ | |
9163bb2e | 256 | card->read.state = LCS_CH_STATE_INIT; |
1da177e4 LT |
257 | |
258 | card->read.io_idx = 0; | |
259 | card->read.buf_idx = 0; | |
260 | } | |
261 | ||
262 | static void | |
263 | lcs_setup_read(struct lcs_card *card) | |
264 | { | |
265 | LCS_DBF_TEXT(3, setup, "initread"); | |
266 | ||
267 | lcs_setup_read_ccws(card); | |
268 | /* Initialize read channel tasklet. */ | |
269 | card->read.irq_tasklet.data = (unsigned long) &card->read; | |
270 | card->read.irq_tasklet.func = lcs_tasklet; | |
271 | /* Initialize waitqueue. */ | |
272 | init_waitqueue_head(&card->read.wait_q); | |
273 | } | |
274 | ||
275 | /* | |
276 | * Setup write channel. | |
277 | */ | |
278 | static void | |
279 | lcs_setup_write_ccws(struct lcs_card *card) | |
280 | { | |
281 | int cnt; | |
282 | ||
283 | LCS_DBF_TEXT(3, setup, "iwritccw"); | |
284 | /* Setup write ccws. */ | |
3c787475 | 285 | memset(card->write.ccws, 0, sizeof(struct ccw1) * (LCS_NUM_BUFFS + 1)); |
1da177e4 LT |
286 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { |
287 | card->write.ccws[cnt].cmd_code = LCS_CCW_WRITE; | |
288 | card->write.ccws[cnt].count = 0; | |
289 | card->write.ccws[cnt].flags = | |
290 | CCW_FLAG_SUSPEND | CCW_FLAG_CC | CCW_FLAG_SLI; | |
291 | /* | |
292 | * Note: we have allocated the buffer with GFP_DMA, so | |
293 | * we do not need to do set_normalized_cda. | |
294 | */ | |
295 | card->write.ccws[cnt].cda = | |
296 | (__u32) __pa(card->write.iob[cnt].data); | |
297 | } | |
298 | /* Last ccw is a tic (transfer in channel). */ | |
299 | card->write.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER; | |
300 | card->write.ccws[LCS_NUM_BUFFS].cda = | |
301 | (__u32) __pa(card->write.ccws); | |
302 | /* Set initial state of the write channel. */ | |
9163bb2e | 303 | card->read.state = LCS_CH_STATE_INIT; |
1da177e4 LT |
304 | |
305 | card->write.io_idx = 0; | |
306 | card->write.buf_idx = 0; | |
307 | } | |
308 | ||
309 | static void | |
310 | lcs_setup_write(struct lcs_card *card) | |
311 | { | |
312 | LCS_DBF_TEXT(3, setup, "initwrit"); | |
313 | ||
314 | lcs_setup_write_ccws(card); | |
315 | /* Initialize write channel tasklet. */ | |
316 | card->write.irq_tasklet.data = (unsigned long) &card->write; | |
317 | card->write.irq_tasklet.func = lcs_tasklet; | |
318 | /* Initialize waitqueue. */ | |
319 | init_waitqueue_head(&card->write.wait_q); | |
320 | } | |
321 | ||
322 | static void | |
323 | lcs_set_allowed_threads(struct lcs_card *card, unsigned long threads) | |
324 | { | |
325 | unsigned long flags; | |
326 | ||
327 | spin_lock_irqsave(&card->mask_lock, flags); | |
328 | card->thread_allowed_mask = threads; | |
329 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
330 | wake_up(&card->wait_q); | |
331 | } | |
332 | static inline int | |
333 | lcs_threads_running(struct lcs_card *card, unsigned long threads) | |
334 | { | |
335 | unsigned long flags; | |
336 | int rc = 0; | |
337 | ||
338 | spin_lock_irqsave(&card->mask_lock, flags); | |
339 | rc = (card->thread_running_mask & threads); | |
340 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
341 | return rc; | |
342 | } | |
343 | ||
344 | static int | |
345 | lcs_wait_for_threads(struct lcs_card *card, unsigned long threads) | |
346 | { | |
347 | return wait_event_interruptible(card->wait_q, | |
348 | lcs_threads_running(card, threads) == 0); | |
349 | } | |
350 | ||
351 | static inline int | |
352 | lcs_set_thread_start_bit(struct lcs_card *card, unsigned long thread) | |
353 | { | |
354 | unsigned long flags; | |
355 | ||
356 | spin_lock_irqsave(&card->mask_lock, flags); | |
357 | if ( !(card->thread_allowed_mask & thread) || | |
358 | (card->thread_start_mask & thread) ) { | |
359 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
360 | return -EPERM; | |
361 | } | |
362 | card->thread_start_mask |= thread; | |
363 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
364 | return 0; | |
365 | } | |
366 | ||
367 | static void | |
368 | lcs_clear_thread_running_bit(struct lcs_card *card, unsigned long thread) | |
369 | { | |
370 | unsigned long flags; | |
371 | ||
372 | spin_lock_irqsave(&card->mask_lock, flags); | |
373 | card->thread_running_mask &= ~thread; | |
374 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
375 | wake_up(&card->wait_q); | |
376 | } | |
377 | ||
378 | static inline int | |
379 | __lcs_do_run_thread(struct lcs_card *card, unsigned long thread) | |
380 | { | |
381 | unsigned long flags; | |
382 | int rc = 0; | |
383 | ||
384 | spin_lock_irqsave(&card->mask_lock, flags); | |
385 | if (card->thread_start_mask & thread){ | |
386 | if ((card->thread_allowed_mask & thread) && | |
387 | !(card->thread_running_mask & thread)){ | |
388 | rc = 1; | |
389 | card->thread_start_mask &= ~thread; | |
390 | card->thread_running_mask |= thread; | |
391 | } else | |
392 | rc = -EPERM; | |
393 | } | |
394 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
395 | return rc; | |
396 | } | |
397 | ||
398 | static int | |
399 | lcs_do_run_thread(struct lcs_card *card, unsigned long thread) | |
400 | { | |
401 | int rc = 0; | |
402 | wait_event(card->wait_q, | |
403 | (rc = __lcs_do_run_thread(card, thread)) >= 0); | |
404 | return rc; | |
405 | } | |
406 | ||
407 | static int | |
408 | lcs_do_start_thread(struct lcs_card *card, unsigned long thread) | |
409 | { | |
410 | unsigned long flags; | |
411 | int rc = 0; | |
412 | ||
413 | spin_lock_irqsave(&card->mask_lock, flags); | |
414 | LCS_DBF_TEXT_(4, trace, " %02x%02x%02x", | |
415 | (u8) card->thread_start_mask, | |
416 | (u8) card->thread_allowed_mask, | |
417 | (u8) card->thread_running_mask); | |
418 | rc = (card->thread_start_mask & thread); | |
419 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
420 | return rc; | |
421 | } | |
422 | ||
423 | /** | |
424 | * Initialize channels,card and state machines. | |
425 | */ | |
426 | static void | |
427 | lcs_setup_card(struct lcs_card *card) | |
428 | { | |
429 | LCS_DBF_TEXT(2, setup, "initcard"); | |
430 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
431 | ||
432 | lcs_setup_read(card); | |
433 | lcs_setup_write(card); | |
434 | /* Set cards initial state. */ | |
435 | card->state = DEV_STATE_DOWN; | |
436 | card->tx_buffer = NULL; | |
437 | card->tx_emitted = 0; | |
438 | ||
1da177e4 LT |
439 | init_waitqueue_head(&card->wait_q); |
440 | spin_lock_init(&card->lock); | |
441 | spin_lock_init(&card->ipm_lock); | |
442 | spin_lock_init(&card->mask_lock); | |
443 | #ifdef CONFIG_IP_MULTICAST | |
444 | INIT_LIST_HEAD(&card->ipm_list); | |
445 | #endif | |
446 | INIT_LIST_HEAD(&card->lancmd_waiters); | |
447 | } | |
448 | ||
449 | static inline void | |
450 | lcs_clear_multicast_list(struct lcs_card *card) | |
451 | { | |
452 | #ifdef CONFIG_IP_MULTICAST | |
453 | struct lcs_ipm_list *ipm; | |
454 | unsigned long flags; | |
455 | ||
456 | /* Free multicast list. */ | |
457 | LCS_DBF_TEXT(3, setup, "clmclist"); | |
458 | spin_lock_irqsave(&card->ipm_lock, flags); | |
459 | while (!list_empty(&card->ipm_list)){ | |
460 | ipm = list_entry(card->ipm_list.next, | |
461 | struct lcs_ipm_list, list); | |
462 | list_del(&ipm->list); | |
463 | if (ipm->ipm_state != LCS_IPM_STATE_SET_REQUIRED){ | |
464 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
465 | lcs_send_delipm(card, ipm); | |
466 | spin_lock_irqsave(&card->ipm_lock, flags); | |
467 | } | |
468 | kfree(ipm); | |
469 | } | |
470 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
471 | #endif | |
472 | } | |
473 | /** | |
474 | * Cleanup channels,card and state machines. | |
475 | */ | |
476 | static void | |
477 | lcs_cleanup_card(struct lcs_card *card) | |
478 | { | |
479 | ||
480 | LCS_DBF_TEXT(3, setup, "cleancrd"); | |
481 | LCS_DBF_HEX(2,setup,&card,sizeof(void*)); | |
482 | ||
483 | if (card->dev != NULL) | |
484 | free_netdev(card->dev); | |
485 | /* Cleanup channels. */ | |
486 | lcs_cleanup_channel(&card->write); | |
487 | lcs_cleanup_channel(&card->read); | |
488 | } | |
489 | ||
490 | /** | |
491 | * Start channel. | |
492 | */ | |
493 | static int | |
494 | lcs_start_channel(struct lcs_channel *channel) | |
495 | { | |
496 | unsigned long flags; | |
497 | int rc; | |
498 | ||
2a0217d5 | 499 | LCS_DBF_TEXT_(4, trace,"ssch%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
500 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
501 | rc = ccw_device_start(channel->ccwdev, | |
502 | channel->ccws + channel->io_idx, 0, 0, | |
503 | DOIO_DENY_PREFETCH | DOIO_ALLOW_SUSPEND); | |
504 | if (rc == 0) | |
9163bb2e | 505 | channel->state = LCS_CH_STATE_RUNNING; |
1da177e4 LT |
506 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); |
507 | if (rc) { | |
2a0217d5 KS |
508 | LCS_DBF_TEXT_(4,trace,"essh%s", |
509 | dev_name(&channel->ccwdev->dev)); | |
c99fc5da KW |
510 | dev_err(&channel->ccwdev->dev, |
511 | "Starting an LCS device resulted in an error," | |
512 | " rc=%d!\n", rc); | |
1da177e4 LT |
513 | } |
514 | return rc; | |
515 | } | |
516 | ||
517 | static int | |
518 | lcs_clear_channel(struct lcs_channel *channel) | |
519 | { | |
520 | unsigned long flags; | |
521 | int rc; | |
522 | ||
523 | LCS_DBF_TEXT(4,trace,"clearch"); | |
2a0217d5 | 524 | LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
525 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
526 | rc = ccw_device_clear(channel->ccwdev, (addr_t) channel); | |
527 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
528 | if (rc) { | |
2a0217d5 KS |
529 | LCS_DBF_TEXT_(4, trace, "ecsc%s", |
530 | dev_name(&channel->ccwdev->dev)); | |
1da177e4 LT |
531 | return rc; |
532 | } | |
9163bb2e UB |
533 | wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_CLEARED)); |
534 | channel->state = LCS_CH_STATE_STOPPED; | |
1da177e4 LT |
535 | return rc; |
536 | } | |
537 | ||
538 | ||
539 | /** | |
540 | * Stop channel. | |
541 | */ | |
542 | static int | |
543 | lcs_stop_channel(struct lcs_channel *channel) | |
544 | { | |
545 | unsigned long flags; | |
546 | int rc; | |
547 | ||
9163bb2e | 548 | if (channel->state == LCS_CH_STATE_STOPPED) |
1da177e4 LT |
549 | return 0; |
550 | LCS_DBF_TEXT(4,trace,"haltsch"); | |
2a0217d5 | 551 | LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev)); |
9163bb2e | 552 | channel->state = LCS_CH_STATE_INIT; |
1da177e4 LT |
553 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
554 | rc = ccw_device_halt(channel->ccwdev, (addr_t) channel); | |
555 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
556 | if (rc) { | |
2a0217d5 KS |
557 | LCS_DBF_TEXT_(4, trace, "ehsc%s", |
558 | dev_name(&channel->ccwdev->dev)); | |
1da177e4 LT |
559 | return rc; |
560 | } | |
561 | /* Asynchronous halt initialted. Wait for its completion. */ | |
9163bb2e | 562 | wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_HALTED)); |
1da177e4 LT |
563 | lcs_clear_channel(channel); |
564 | return 0; | |
565 | } | |
566 | ||
567 | /** | |
568 | * start read and write channel | |
569 | */ | |
570 | static int | |
571 | lcs_start_channels(struct lcs_card *card) | |
572 | { | |
573 | int rc; | |
574 | ||
575 | LCS_DBF_TEXT(2, trace, "chstart"); | |
576 | /* start read channel */ | |
577 | rc = lcs_start_channel(&card->read); | |
578 | if (rc) | |
579 | return rc; | |
580 | /* start write channel */ | |
581 | rc = lcs_start_channel(&card->write); | |
582 | if (rc) | |
583 | lcs_stop_channel(&card->read); | |
584 | return rc; | |
585 | } | |
586 | ||
587 | /** | |
588 | * stop read and write channel | |
589 | */ | |
590 | static int | |
591 | lcs_stop_channels(struct lcs_card *card) | |
592 | { | |
593 | LCS_DBF_TEXT(2, trace, "chhalt"); | |
594 | lcs_stop_channel(&card->read); | |
595 | lcs_stop_channel(&card->write); | |
596 | return 0; | |
597 | } | |
598 | ||
599 | /** | |
600 | * Get empty buffer. | |
601 | */ | |
602 | static struct lcs_buffer * | |
603 | __lcs_get_buffer(struct lcs_channel *channel) | |
604 | { | |
605 | int index; | |
606 | ||
607 | LCS_DBF_TEXT(5, trace, "_getbuff"); | |
608 | index = channel->io_idx; | |
609 | do { | |
9163bb2e UB |
610 | if (channel->iob[index].state == LCS_BUF_STATE_EMPTY) { |
611 | channel->iob[index].state = LCS_BUF_STATE_LOCKED; | |
1da177e4 LT |
612 | return channel->iob + index; |
613 | } | |
614 | index = (index + 1) & (LCS_NUM_BUFFS - 1); | |
615 | } while (index != channel->io_idx); | |
616 | return NULL; | |
617 | } | |
618 | ||
619 | static struct lcs_buffer * | |
620 | lcs_get_buffer(struct lcs_channel *channel) | |
621 | { | |
622 | struct lcs_buffer *buffer; | |
623 | unsigned long flags; | |
624 | ||
625 | LCS_DBF_TEXT(5, trace, "getbuff"); | |
626 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); | |
627 | buffer = __lcs_get_buffer(channel); | |
628 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
629 | return buffer; | |
630 | } | |
631 | ||
632 | /** | |
633 | * Resume channel program if the channel is suspended. | |
634 | */ | |
635 | static int | |
636 | __lcs_resume_channel(struct lcs_channel *channel) | |
637 | { | |
638 | int rc; | |
639 | ||
9163bb2e | 640 | if (channel->state != LCS_CH_STATE_SUSPENDED) |
1da177e4 LT |
641 | return 0; |
642 | if (channel->ccws[channel->io_idx].flags & CCW_FLAG_SUSPEND) | |
643 | return 0; | |
2a0217d5 | 644 | LCS_DBF_TEXT_(5, trace, "rsch%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
645 | rc = ccw_device_resume(channel->ccwdev); |
646 | if (rc) { | |
2a0217d5 KS |
647 | LCS_DBF_TEXT_(4, trace, "ersc%s", |
648 | dev_name(&channel->ccwdev->dev)); | |
c99fc5da KW |
649 | dev_err(&channel->ccwdev->dev, |
650 | "Sending data from the LCS device to the LAN failed" | |
651 | " with rc=%d\n",rc); | |
1da177e4 | 652 | } else |
9163bb2e | 653 | channel->state = LCS_CH_STATE_RUNNING; |
1da177e4 LT |
654 | return rc; |
655 | ||
656 | } | |
657 | ||
658 | /** | |
659 | * Make a buffer ready for processing. | |
660 | */ | |
661 | static inline void | |
662 | __lcs_ready_buffer_bits(struct lcs_channel *channel, int index) | |
663 | { | |
664 | int prev, next; | |
665 | ||
666 | LCS_DBF_TEXT(5, trace, "rdybits"); | |
667 | prev = (index - 1) & (LCS_NUM_BUFFS - 1); | |
668 | next = (index + 1) & (LCS_NUM_BUFFS - 1); | |
669 | /* Check if we may clear the suspend bit of this buffer. */ | |
670 | if (channel->ccws[next].flags & CCW_FLAG_SUSPEND) { | |
671 | /* Check if we have to set the PCI bit. */ | |
672 | if (!(channel->ccws[prev].flags & CCW_FLAG_SUSPEND)) | |
673 | /* Suspend bit of the previous buffer is not set. */ | |
674 | channel->ccws[index].flags |= CCW_FLAG_PCI; | |
675 | /* Suspend bit of the next buffer is set. */ | |
676 | channel->ccws[index].flags &= ~CCW_FLAG_SUSPEND; | |
677 | } | |
678 | } | |
679 | ||
680 | static int | |
681 | lcs_ready_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
682 | { | |
683 | unsigned long flags; | |
684 | int index, rc; | |
685 | ||
686 | LCS_DBF_TEXT(5, trace, "rdybuff"); | |
9163bb2e UB |
687 | BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED && |
688 | buffer->state != LCS_BUF_STATE_PROCESSED); | |
1da177e4 | 689 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
9163bb2e | 690 | buffer->state = LCS_BUF_STATE_READY; |
1da177e4 LT |
691 | index = buffer - channel->iob; |
692 | /* Set length. */ | |
693 | channel->ccws[index].count = buffer->count; | |
694 | /* Check relevant PCI/suspend bits. */ | |
695 | __lcs_ready_buffer_bits(channel, index); | |
696 | rc = __lcs_resume_channel(channel); | |
697 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
698 | return rc; | |
699 | } | |
700 | ||
701 | /** | |
702 | * Mark the buffer as processed. Take care of the suspend bit | |
703 | * of the previous buffer. This function is called from | |
704 | * interrupt context, so the lock must not be taken. | |
705 | */ | |
706 | static int | |
707 | __lcs_processed_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
708 | { | |
709 | int index, prev, next; | |
710 | ||
711 | LCS_DBF_TEXT(5, trace, "prcsbuff"); | |
9163bb2e UB |
712 | BUG_ON(buffer->state != LCS_BUF_STATE_READY); |
713 | buffer->state = LCS_BUF_STATE_PROCESSED; | |
1da177e4 LT |
714 | index = buffer - channel->iob; |
715 | prev = (index - 1) & (LCS_NUM_BUFFS - 1); | |
716 | next = (index + 1) & (LCS_NUM_BUFFS - 1); | |
717 | /* Set the suspend bit and clear the PCI bit of this buffer. */ | |
718 | channel->ccws[index].flags |= CCW_FLAG_SUSPEND; | |
719 | channel->ccws[index].flags &= ~CCW_FLAG_PCI; | |
720 | /* Check the suspend bit of the previous buffer. */ | |
9163bb2e | 721 | if (channel->iob[prev].state == LCS_BUF_STATE_READY) { |
1da177e4 LT |
722 | /* |
723 | * Previous buffer is in state ready. It might have | |
724 | * happened in lcs_ready_buffer that the suspend bit | |
725 | * has not been cleared to avoid an endless loop. | |
726 | * Do it now. | |
727 | */ | |
728 | __lcs_ready_buffer_bits(channel, prev); | |
729 | } | |
730 | /* Clear PCI bit of next buffer. */ | |
731 | channel->ccws[next].flags &= ~CCW_FLAG_PCI; | |
732 | return __lcs_resume_channel(channel); | |
733 | } | |
734 | ||
735 | /** | |
736 | * Put a processed buffer back to state empty. | |
737 | */ | |
738 | static void | |
739 | lcs_release_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
740 | { | |
741 | unsigned long flags; | |
742 | ||
743 | LCS_DBF_TEXT(5, trace, "relbuff"); | |
9163bb2e UB |
744 | BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED && |
745 | buffer->state != LCS_BUF_STATE_PROCESSED); | |
1da177e4 | 746 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
9163bb2e | 747 | buffer->state = LCS_BUF_STATE_EMPTY; |
1da177e4 LT |
748 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); |
749 | } | |
750 | ||
751 | /** | |
752 | * Get buffer for a lan command. | |
753 | */ | |
754 | static struct lcs_buffer * | |
755 | lcs_get_lancmd(struct lcs_card *card, int count) | |
756 | { | |
757 | struct lcs_buffer *buffer; | |
758 | struct lcs_cmd *cmd; | |
759 | ||
760 | LCS_DBF_TEXT(4, trace, "getlncmd"); | |
761 | /* Get buffer and wait if none is available. */ | |
762 | wait_event(card->write.wait_q, | |
763 | ((buffer = lcs_get_buffer(&card->write)) != NULL)); | |
764 | count += sizeof(struct lcs_header); | |
765 | *(__u16 *)(buffer->data + count) = 0; | |
766 | buffer->count = count + sizeof(__u16); | |
767 | buffer->callback = lcs_release_buffer; | |
768 | cmd = (struct lcs_cmd *) buffer->data; | |
769 | cmd->offset = count; | |
770 | cmd->type = LCS_FRAME_TYPE_CONTROL; | |
771 | cmd->slot = 0; | |
772 | return buffer; | |
773 | } | |
774 | ||
775 | ||
776 | static void | |
777 | lcs_get_reply(struct lcs_reply *reply) | |
778 | { | |
779 | WARN_ON(atomic_read(&reply->refcnt) <= 0); | |
780 | atomic_inc(&reply->refcnt); | |
781 | } | |
782 | ||
783 | static void | |
784 | lcs_put_reply(struct lcs_reply *reply) | |
785 | { | |
786 | WARN_ON(atomic_read(&reply->refcnt) <= 0); | |
787 | if (atomic_dec_and_test(&reply->refcnt)) { | |
788 | kfree(reply); | |
789 | } | |
790 | ||
791 | } | |
792 | ||
793 | static struct lcs_reply * | |
794 | lcs_alloc_reply(struct lcs_cmd *cmd) | |
795 | { | |
796 | struct lcs_reply *reply; | |
797 | ||
798 | LCS_DBF_TEXT(4, trace, "getreply"); | |
799 | ||
88abaab4 | 800 | reply = kzalloc(sizeof(struct lcs_reply), GFP_ATOMIC); |
1da177e4 LT |
801 | if (!reply) |
802 | return NULL; | |
1da177e4 LT |
803 | atomic_set(&reply->refcnt,1); |
804 | reply->sequence_no = cmd->sequence_no; | |
805 | reply->received = 0; | |
806 | reply->rc = 0; | |
807 | init_waitqueue_head(&reply->wait_q); | |
808 | ||
809 | return reply; | |
810 | } | |
811 | ||
812 | /** | |
813 | * Notifier function for lancmd replies. Called from read irq. | |
814 | */ | |
815 | static void | |
816 | lcs_notify_lancmd_waiters(struct lcs_card *card, struct lcs_cmd *cmd) | |
817 | { | |
818 | struct list_head *l, *n; | |
819 | struct lcs_reply *reply; | |
820 | ||
821 | LCS_DBF_TEXT(4, trace, "notiwait"); | |
822 | spin_lock(&card->lock); | |
823 | list_for_each_safe(l, n, &card->lancmd_waiters) { | |
824 | reply = list_entry(l, struct lcs_reply, list); | |
825 | if (reply->sequence_no == cmd->sequence_no) { | |
826 | lcs_get_reply(reply); | |
827 | list_del_init(&reply->list); | |
828 | if (reply->callback != NULL) | |
829 | reply->callback(card, cmd); | |
830 | reply->received = 1; | |
831 | reply->rc = cmd->return_code; | |
832 | wake_up(&reply->wait_q); | |
833 | lcs_put_reply(reply); | |
834 | break; | |
835 | } | |
836 | } | |
837 | spin_unlock(&card->lock); | |
838 | } | |
839 | ||
840 | /** | |
b595076a | 841 | * Emit buffer of a lan command. |
1da177e4 | 842 | */ |
2b67fc46 | 843 | static void |
1da177e4 LT |
844 | lcs_lancmd_timeout(unsigned long data) |
845 | { | |
846 | struct lcs_reply *reply, *list_reply, *r; | |
847 | unsigned long flags; | |
848 | ||
849 | LCS_DBF_TEXT(4, trace, "timeout"); | |
850 | reply = (struct lcs_reply *) data; | |
851 | spin_lock_irqsave(&reply->card->lock, flags); | |
852 | list_for_each_entry_safe(list_reply, r, | |
853 | &reply->card->lancmd_waiters,list) { | |
854 | if (reply == list_reply) { | |
855 | lcs_get_reply(reply); | |
856 | list_del_init(&reply->list); | |
857 | spin_unlock_irqrestore(&reply->card->lock, flags); | |
858 | reply->received = 1; | |
859 | reply->rc = -ETIME; | |
860 | wake_up(&reply->wait_q); | |
861 | lcs_put_reply(reply); | |
862 | return; | |
863 | } | |
864 | } | |
865 | spin_unlock_irqrestore(&reply->card->lock, flags); | |
866 | } | |
867 | ||
868 | static int | |
869 | lcs_send_lancmd(struct lcs_card *card, struct lcs_buffer *buffer, | |
870 | void (*reply_callback)(struct lcs_card *, struct lcs_cmd *)) | |
871 | { | |
872 | struct lcs_reply *reply; | |
873 | struct lcs_cmd *cmd; | |
874 | struct timer_list timer; | |
875 | unsigned long flags; | |
876 | int rc; | |
877 | ||
878 | LCS_DBF_TEXT(4, trace, "sendcmd"); | |
879 | cmd = (struct lcs_cmd *) buffer->data; | |
880 | cmd->return_code = 0; | |
881 | cmd->sequence_no = card->sequence_no++; | |
882 | reply = lcs_alloc_reply(cmd); | |
883 | if (!reply) | |
884 | return -ENOMEM; | |
885 | reply->callback = reply_callback; | |
886 | reply->card = card; | |
887 | spin_lock_irqsave(&card->lock, flags); | |
888 | list_add_tail(&reply->list, &card->lancmd_waiters); | |
889 | spin_unlock_irqrestore(&card->lock, flags); | |
890 | ||
891 | buffer->callback = lcs_release_buffer; | |
892 | rc = lcs_ready_buffer(&card->write, buffer); | |
893 | if (rc) | |
894 | return rc; | |
d62e09e3 | 895 | init_timer_on_stack(&timer); |
1da177e4 LT |
896 | timer.function = lcs_lancmd_timeout; |
897 | timer.data = (unsigned long) reply; | |
898 | timer.expires = jiffies + HZ*card->lancmd_timeout; | |
899 | add_timer(&timer); | |
900 | wait_event(reply->wait_q, reply->received); | |
901 | del_timer_sync(&timer); | |
902 | LCS_DBF_TEXT_(4, trace, "rc:%d",reply->rc); | |
903 | rc = reply->rc; | |
904 | lcs_put_reply(reply); | |
905 | return rc ? -EIO : 0; | |
906 | } | |
907 | ||
908 | /** | |
909 | * LCS startup command | |
910 | */ | |
911 | static int | |
912 | lcs_send_startup(struct lcs_card *card, __u8 initiator) | |
913 | { | |
914 | struct lcs_buffer *buffer; | |
915 | struct lcs_cmd *cmd; | |
916 | ||
917 | LCS_DBF_TEXT(2, trace, "startup"); | |
918 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
919 | cmd = (struct lcs_cmd *) buffer->data; | |
920 | cmd->cmd_code = LCS_CMD_STARTUP; | |
921 | cmd->initiator = initiator; | |
922 | cmd->cmd.lcs_startup.buff_size = LCS_IOBUFFERSIZE; | |
923 | return lcs_send_lancmd(card, buffer, NULL); | |
924 | } | |
925 | ||
926 | /** | |
927 | * LCS shutdown command | |
928 | */ | |
929 | static int | |
930 | lcs_send_shutdown(struct lcs_card *card) | |
931 | { | |
932 | struct lcs_buffer *buffer; | |
933 | struct lcs_cmd *cmd; | |
934 | ||
935 | LCS_DBF_TEXT(2, trace, "shutdown"); | |
936 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
937 | cmd = (struct lcs_cmd *) buffer->data; | |
938 | cmd->cmd_code = LCS_CMD_SHUTDOWN; | |
939 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
940 | return lcs_send_lancmd(card, buffer, NULL); | |
941 | } | |
942 | ||
943 | /** | |
944 | * LCS lanstat command | |
945 | */ | |
946 | static void | |
947 | __lcs_lanstat_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
948 | { | |
949 | LCS_DBF_TEXT(2, trace, "statcb"); | |
950 | memcpy(card->mac, cmd->cmd.lcs_lanstat_cmd.mac_addr, LCS_MAC_LENGTH); | |
951 | } | |
952 | ||
953 | static int | |
954 | lcs_send_lanstat(struct lcs_card *card) | |
955 | { | |
956 | struct lcs_buffer *buffer; | |
957 | struct lcs_cmd *cmd; | |
958 | ||
959 | LCS_DBF_TEXT(2,trace, "cmdstat"); | |
960 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
961 | cmd = (struct lcs_cmd *) buffer->data; | |
962 | /* Setup lanstat command. */ | |
963 | cmd->cmd_code = LCS_CMD_LANSTAT; | |
964 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
965 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
966 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
967 | return lcs_send_lancmd(card, buffer, __lcs_lanstat_cb); | |
968 | } | |
969 | ||
970 | /** | |
971 | * send stoplan command | |
972 | */ | |
973 | static int | |
974 | lcs_send_stoplan(struct lcs_card *card, __u8 initiator) | |
975 | { | |
976 | struct lcs_buffer *buffer; | |
977 | struct lcs_cmd *cmd; | |
978 | ||
979 | LCS_DBF_TEXT(2, trace, "cmdstpln"); | |
980 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
981 | cmd = (struct lcs_cmd *) buffer->data; | |
982 | cmd->cmd_code = LCS_CMD_STOPLAN; | |
983 | cmd->initiator = initiator; | |
984 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
985 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
986 | return lcs_send_lancmd(card, buffer, NULL); | |
987 | } | |
988 | ||
989 | /** | |
990 | * send startlan command | |
991 | */ | |
992 | static void | |
993 | __lcs_send_startlan_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
994 | { | |
995 | LCS_DBF_TEXT(2, trace, "srtlancb"); | |
996 | card->lan_type = cmd->cmd.lcs_std_cmd.lan_type; | |
997 | card->portno = cmd->cmd.lcs_std_cmd.portno; | |
998 | } | |
999 | ||
1000 | static int | |
1001 | lcs_send_startlan(struct lcs_card *card, __u8 initiator) | |
1002 | { | |
1003 | struct lcs_buffer *buffer; | |
1004 | struct lcs_cmd *cmd; | |
1005 | ||
1006 | LCS_DBF_TEXT(2, trace, "cmdstaln"); | |
1007 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
1008 | cmd = (struct lcs_cmd *) buffer->data; | |
1009 | cmd->cmd_code = LCS_CMD_STARTLAN; | |
1010 | cmd->initiator = initiator; | |
1011 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
1012 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
1013 | return lcs_send_lancmd(card, buffer, __lcs_send_startlan_cb); | |
1014 | } | |
1015 | ||
1016 | #ifdef CONFIG_IP_MULTICAST | |
1017 | /** | |
1018 | * send setipm command (Multicast) | |
1019 | */ | |
1020 | static int | |
1021 | lcs_send_setipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list) | |
1022 | { | |
1023 | struct lcs_buffer *buffer; | |
1024 | struct lcs_cmd *cmd; | |
1025 | ||
1026 | LCS_DBF_TEXT(2, trace, "cmdsetim"); | |
1027 | buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE); | |
1028 | cmd = (struct lcs_cmd *) buffer->data; | |
1029 | cmd->cmd_code = LCS_CMD_SETIPM; | |
1030 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1031 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1032 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1033 | cmd->cmd.lcs_qipassist.version = 4; | |
1034 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1035 | memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair, | |
1036 | &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair)); | |
1037 | LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr); | |
1038 | return lcs_send_lancmd(card, buffer, NULL); | |
1039 | } | |
1040 | ||
1041 | /** | |
1042 | * send delipm command (Multicast) | |
1043 | */ | |
1044 | static int | |
1045 | lcs_send_delipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list) | |
1046 | { | |
1047 | struct lcs_buffer *buffer; | |
1048 | struct lcs_cmd *cmd; | |
1049 | ||
1050 | LCS_DBF_TEXT(2, trace, "cmddelim"); | |
1051 | buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE); | |
1052 | cmd = (struct lcs_cmd *) buffer->data; | |
1053 | cmd->cmd_code = LCS_CMD_DELIPM; | |
1054 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1055 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1056 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1057 | cmd->cmd.lcs_qipassist.version = 4; | |
1058 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1059 | memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair, | |
1060 | &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair)); | |
1061 | LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr); | |
1062 | return lcs_send_lancmd(card, buffer, NULL); | |
1063 | } | |
1064 | ||
1065 | /** | |
1066 | * check if multicast is supported by LCS | |
1067 | */ | |
1068 | static void | |
1069 | __lcs_check_multicast_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
1070 | { | |
1071 | LCS_DBF_TEXT(2, trace, "chkmccb"); | |
1072 | card->ip_assists_supported = | |
1073 | cmd->cmd.lcs_qipassist.ip_assists_supported; | |
1074 | card->ip_assists_enabled = | |
1075 | cmd->cmd.lcs_qipassist.ip_assists_enabled; | |
1076 | } | |
1077 | ||
1078 | static int | |
1079 | lcs_check_multicast_support(struct lcs_card *card) | |
1080 | { | |
1081 | struct lcs_buffer *buffer; | |
1082 | struct lcs_cmd *cmd; | |
1083 | int rc; | |
1084 | ||
1085 | LCS_DBF_TEXT(2, trace, "cmdqipa"); | |
1086 | /* Send query ipassist. */ | |
1087 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
1088 | cmd = (struct lcs_cmd *) buffer->data; | |
1089 | cmd->cmd_code = LCS_CMD_QIPASSIST; | |
1090 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1091 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1092 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1093 | cmd->cmd.lcs_qipassist.version = 4; | |
1094 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1095 | rc = lcs_send_lancmd(card, buffer, __lcs_check_multicast_cb); | |
1096 | if (rc != 0) { | |
c99fc5da | 1097 | pr_err("Query IPAssist failed. Assuming unsupported!\n"); |
1da177e4 LT |
1098 | return -EOPNOTSUPP; |
1099 | } | |
1da177e4 LT |
1100 | if (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) |
1101 | return 0; | |
1102 | return -EOPNOTSUPP; | |
1103 | } | |
1104 | ||
1105 | /** | |
1106 | * set or del multicast address on LCS card | |
1107 | */ | |
1108 | static void | |
1109 | lcs_fix_multicast_list(struct lcs_card *card) | |
1110 | { | |
1111 | struct list_head failed_list; | |
1112 | struct lcs_ipm_list *ipm, *tmp; | |
1113 | unsigned long flags; | |
1114 | int rc; | |
1115 | ||
1116 | LCS_DBF_TEXT(4,trace, "fixipm"); | |
1117 | INIT_LIST_HEAD(&failed_list); | |
1118 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1119 | list_modified: | |
1120 | list_for_each_entry_safe(ipm, tmp, &card->ipm_list, list){ | |
1121 | switch (ipm->ipm_state) { | |
1122 | case LCS_IPM_STATE_SET_REQUIRED: | |
25985edc | 1123 | /* del from ipm_list so no one else can tamper with |
1da177e4 LT |
1124 | * this entry */ |
1125 | list_del_init(&ipm->list); | |
1126 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1127 | rc = lcs_send_setipm(card, ipm); | |
1128 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1129 | if (rc) { | |
c99fc5da KW |
1130 | pr_info("Adding multicast address failed." |
1131 | " Table possibly full!\n"); | |
1da177e4 LT |
1132 | /* store ipm in failed list -> will be added |
1133 | * to ipm_list again, so a retry will be done | |
1134 | * during the next call of this function */ | |
1135 | list_add_tail(&ipm->list, &failed_list); | |
1136 | } else { | |
1137 | ipm->ipm_state = LCS_IPM_STATE_ON_CARD; | |
1138 | /* re-insert into ipm_list */ | |
1139 | list_add_tail(&ipm->list, &card->ipm_list); | |
1140 | } | |
1141 | goto list_modified; | |
1142 | case LCS_IPM_STATE_DEL_REQUIRED: | |
1143 | list_del(&ipm->list); | |
1144 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1145 | lcs_send_delipm(card, ipm); | |
1146 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1147 | kfree(ipm); | |
1148 | goto list_modified; | |
1149 | case LCS_IPM_STATE_ON_CARD: | |
1150 | break; | |
1151 | } | |
1152 | } | |
1153 | /* re-insert all entries from the failed_list into ipm_list */ | |
179e0917 AM |
1154 | list_for_each_entry_safe(ipm, tmp, &failed_list, list) |
1155 | list_move_tail(&ipm->list, &card->ipm_list); | |
1156 | ||
1da177e4 | 1157 | spin_unlock_irqrestore(&card->ipm_lock, flags); |
1da177e4 LT |
1158 | } |
1159 | ||
1160 | /** | |
1161 | * get mac address for the relevant Multicast address | |
1162 | */ | |
1163 | static void | |
5a5a852e | 1164 | lcs_get_mac_for_ipm(__be32 ipm, char *mac, struct net_device *dev) |
1da177e4 LT |
1165 | { |
1166 | LCS_DBF_TEXT(4,trace, "getmac"); | |
1abd2296 | 1167 | ip_eth_mc_map(ipm, mac); |
1da177e4 LT |
1168 | } |
1169 | ||
1170 | /** | |
1171 | * function called by net device to handle multicast address relevant things | |
1172 | */ | |
1173 | static inline void | |
1174 | lcs_remove_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) | |
1175 | { | |
1176 | struct ip_mc_list *im4; | |
1177 | struct list_head *l; | |
1178 | struct lcs_ipm_list *ipm; | |
1179 | unsigned long flags; | |
1180 | char buf[MAX_ADDR_LEN]; | |
1181 | ||
1182 | LCS_DBF_TEXT(4, trace, "remmclst"); | |
1183 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1184 | list_for_each(l, &card->ipm_list) { | |
1185 | ipm = list_entry(l, struct lcs_ipm_list, list); | |
f3aa3136 SS |
1186 | for (im4 = rcu_dereference(in4_dev->mc_list); |
1187 | im4 != NULL; im4 = rcu_dereference(im4->next_rcu)) { | |
1da177e4 LT |
1188 | lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); |
1189 | if ( (ipm->ipm.ip_addr == im4->multiaddr) && | |
1190 | (memcmp(buf, &ipm->ipm.mac_addr, | |
1191 | LCS_MAC_LENGTH) == 0) ) | |
1192 | break; | |
1193 | } | |
1194 | if (im4 == NULL) | |
1195 | ipm->ipm_state = LCS_IPM_STATE_DEL_REQUIRED; | |
1196 | } | |
1197 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1198 | } | |
1199 | ||
1200 | static inline struct lcs_ipm_list * | |
1201 | lcs_check_addr_entry(struct lcs_card *card, struct ip_mc_list *im4, char *buf) | |
1202 | { | |
1203 | struct lcs_ipm_list *tmp, *ipm = NULL; | |
1204 | struct list_head *l; | |
1205 | unsigned long flags; | |
1206 | ||
1207 | LCS_DBF_TEXT(4, trace, "chkmcent"); | |
1208 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1209 | list_for_each(l, &card->ipm_list) { | |
1210 | tmp = list_entry(l, struct lcs_ipm_list, list); | |
1211 | if ( (tmp->ipm.ip_addr == im4->multiaddr) && | |
1212 | (memcmp(buf, &tmp->ipm.mac_addr, | |
1213 | LCS_MAC_LENGTH) == 0) ) { | |
1214 | ipm = tmp; | |
1215 | break; | |
1216 | } | |
1217 | } | |
1218 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1219 | return ipm; | |
1220 | } | |
1221 | ||
1222 | static inline void | |
1223 | lcs_set_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) | |
1224 | { | |
1225 | ||
1226 | struct ip_mc_list *im4; | |
1227 | struct lcs_ipm_list *ipm; | |
1228 | char buf[MAX_ADDR_LEN]; | |
1229 | unsigned long flags; | |
1230 | ||
1231 | LCS_DBF_TEXT(4, trace, "setmclst"); | |
f3aa3136 SS |
1232 | for (im4 = rcu_dereference(in4_dev->mc_list); im4 != NULL; |
1233 | im4 = rcu_dereference(im4->next_rcu)) { | |
1da177e4 LT |
1234 | lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); |
1235 | ipm = lcs_check_addr_entry(card, im4, buf); | |
1236 | if (ipm != NULL) | |
1237 | continue; /* Address already in list. */ | |
ae57b20a | 1238 | ipm = kzalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC); |
1da177e4 | 1239 | if (ipm == NULL) { |
c99fc5da KW |
1240 | pr_info("Not enough memory to add" |
1241 | " new multicast entry!\n"); | |
1da177e4 LT |
1242 | break; |
1243 | } | |
1da177e4 LT |
1244 | memcpy(&ipm->ipm.mac_addr, buf, LCS_MAC_LENGTH); |
1245 | ipm->ipm.ip_addr = im4->multiaddr; | |
1246 | ipm->ipm_state = LCS_IPM_STATE_SET_REQUIRED; | |
1247 | spin_lock_irqsave(&card->ipm_lock, flags); | |
27eb5ac8 | 1248 | LCS_DBF_HEX(2,trace,&ipm->ipm.ip_addr,4); |
1da177e4 LT |
1249 | list_add(&ipm->list, &card->ipm_list); |
1250 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1251 | } | |
1252 | } | |
1253 | ||
1254 | static int | |
1255 | lcs_register_mc_addresses(void *data) | |
1256 | { | |
1257 | struct lcs_card *card; | |
1258 | struct in_device *in4_dev; | |
1259 | ||
1260 | card = (struct lcs_card *) data; | |
1da177e4 LT |
1261 | |
1262 | if (!lcs_do_run_thread(card, LCS_SET_MC_THREAD)) | |
1263 | return 0; | |
1264 | LCS_DBF_TEXT(4, trace, "regmulti"); | |
1265 | ||
1266 | in4_dev = in_dev_get(card->dev); | |
1267 | if (in4_dev == NULL) | |
1268 | goto out; | |
f3aa3136 | 1269 | rcu_read_lock(); |
1da177e4 LT |
1270 | lcs_remove_mc_addresses(card,in4_dev); |
1271 | lcs_set_mc_addresses(card, in4_dev); | |
f3aa3136 | 1272 | rcu_read_unlock(); |
1da177e4 LT |
1273 | in_dev_put(in4_dev); |
1274 | ||
27eb5ac8 KW |
1275 | netif_carrier_off(card->dev); |
1276 | netif_tx_disable(card->dev); | |
1277 | wait_event(card->write.wait_q, | |
9163bb2e | 1278 | (card->write.state != LCS_CH_STATE_RUNNING)); |
1da177e4 | 1279 | lcs_fix_multicast_list(card); |
27eb5ac8 KW |
1280 | if (card->state == DEV_STATE_UP) { |
1281 | netif_carrier_on(card->dev); | |
1282 | netif_wake_queue(card->dev); | |
1283 | } | |
1da177e4 LT |
1284 | out: |
1285 | lcs_clear_thread_running_bit(card, LCS_SET_MC_THREAD); | |
1286 | return 0; | |
1287 | } | |
801599b0 HC |
1288 | #endif /* CONFIG_IP_MULTICAST */ |
1289 | ||
1da177e4 LT |
1290 | /** |
1291 | * function called by net device to | |
1292 | * handle multicast address relevant things | |
1293 | */ | |
1294 | static void | |
1295 | lcs_set_multicast_list(struct net_device *dev) | |
1296 | { | |
801599b0 | 1297 | #ifdef CONFIG_IP_MULTICAST |
1da177e4 LT |
1298 | struct lcs_card *card; |
1299 | ||
1300 | LCS_DBF_TEXT(4, trace, "setmulti"); | |
ad660e2f | 1301 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 | 1302 | |
e82b0f2c | 1303 | if (!lcs_set_thread_start_bit(card, LCS_SET_MC_THREAD)) |
1da177e4 | 1304 | schedule_work(&card->kernel_thread_starter); |
1da177e4 | 1305 | #endif /* CONFIG_IP_MULTICAST */ |
801599b0 | 1306 | } |
1da177e4 LT |
1307 | |
1308 | static long | |
1309 | lcs_check_irb_error(struct ccw_device *cdev, struct irb *irb) | |
1310 | { | |
1311 | if (!IS_ERR(irb)) | |
1312 | return 0; | |
1313 | ||
1314 | switch (PTR_ERR(irb)) { | |
1315 | case -EIO: | |
c99fc5da KW |
1316 | dev_warn(&cdev->dev, |
1317 | "An I/O-error occurred on the LCS device\n"); | |
1da177e4 LT |
1318 | LCS_DBF_TEXT(2, trace, "ckirberr"); |
1319 | LCS_DBF_TEXT_(2, trace, " rc%d", -EIO); | |
1320 | break; | |
1321 | case -ETIMEDOUT: | |
c99fc5da KW |
1322 | dev_warn(&cdev->dev, |
1323 | "A command timed out on the LCS device\n"); | |
1da177e4 LT |
1324 | LCS_DBF_TEXT(2, trace, "ckirberr"); |
1325 | LCS_DBF_TEXT_(2, trace, " rc%d", -ETIMEDOUT); | |
1326 | break; | |
1327 | default: | |
c99fc5da KW |
1328 | dev_warn(&cdev->dev, |
1329 | "An error occurred on the LCS device, rc=%ld\n", | |
1330 | PTR_ERR(irb)); | |
1da177e4 LT |
1331 | LCS_DBF_TEXT(2, trace, "ckirberr"); |
1332 | LCS_DBF_TEXT(2, trace, " rc???"); | |
1333 | } | |
1334 | return PTR_ERR(irb); | |
1335 | } | |
1336 | ||
27eb5ac8 KW |
1337 | static int |
1338 | lcs_get_problem(struct ccw_device *cdev, struct irb *irb) | |
1339 | { | |
1340 | int dstat, cstat; | |
1341 | char *sense; | |
1342 | ||
1343 | sense = (char *) irb->ecw; | |
23d805b6 PO |
1344 | cstat = irb->scsw.cmd.cstat; |
1345 | dstat = irb->scsw.cmd.dstat; | |
27eb5ac8 KW |
1346 | |
1347 | if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK | | |
1348 | SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK | | |
1349 | SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) { | |
1350 | LCS_DBF_TEXT(2, trace, "CGENCHK"); | |
1351 | return 1; | |
1352 | } | |
1353 | if (dstat & DEV_STAT_UNIT_CHECK) { | |
1354 | if (sense[LCS_SENSE_BYTE_1] & | |
1355 | LCS_SENSE_RESETTING_EVENT) { | |
1356 | LCS_DBF_TEXT(2, trace, "REVIND"); | |
1357 | return 1; | |
1358 | } | |
1359 | if (sense[LCS_SENSE_BYTE_0] & | |
1360 | LCS_SENSE_CMD_REJECT) { | |
1361 | LCS_DBF_TEXT(2, trace, "CMDREJ"); | |
1362 | return 0; | |
1363 | } | |
1364 | if ((!sense[LCS_SENSE_BYTE_0]) && | |
1365 | (!sense[LCS_SENSE_BYTE_1]) && | |
1366 | (!sense[LCS_SENSE_BYTE_2]) && | |
1367 | (!sense[LCS_SENSE_BYTE_3])) { | |
1368 | LCS_DBF_TEXT(2, trace, "ZEROSEN"); | |
1369 | return 0; | |
1370 | } | |
1371 | LCS_DBF_TEXT(2, trace, "DGENCHK"); | |
1372 | return 1; | |
1373 | } | |
1374 | return 0; | |
1375 | } | |
1376 | ||
2b67fc46 | 1377 | static void |
27eb5ac8 KW |
1378 | lcs_schedule_recovery(struct lcs_card *card) |
1379 | { | |
1380 | LCS_DBF_TEXT(2, trace, "startrec"); | |
1381 | if (!lcs_set_thread_start_bit(card, LCS_RECOVERY_THREAD)) | |
1382 | schedule_work(&card->kernel_thread_starter); | |
1383 | } | |
1da177e4 LT |
1384 | |
1385 | /** | |
1386 | * IRQ Handler for LCS channels | |
1387 | */ | |
1388 | static void | |
1389 | lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb) | |
1390 | { | |
1391 | struct lcs_card *card; | |
1392 | struct lcs_channel *channel; | |
27eb5ac8 KW |
1393 | int rc, index; |
1394 | int cstat, dstat; | |
1da177e4 LT |
1395 | |
1396 | if (lcs_check_irb_error(cdev, irb)) | |
1397 | return; | |
1398 | ||
1399 | card = CARD_FROM_DEV(cdev); | |
1400 | if (card->read.ccwdev == cdev) | |
1401 | channel = &card->read; | |
1402 | else | |
1403 | channel = &card->write; | |
1404 | ||
23d805b6 PO |
1405 | cstat = irb->scsw.cmd.cstat; |
1406 | dstat = irb->scsw.cmd.dstat; | |
2a0217d5 | 1407 | LCS_DBF_TEXT_(5, trace, "Rint%s", dev_name(&cdev->dev)); |
23d805b6 PO |
1408 | LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.cstat, |
1409 | irb->scsw.cmd.dstat); | |
1410 | LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.fctl, | |
1411 | irb->scsw.cmd.actl); | |
1da177e4 | 1412 | |
27eb5ac8 KW |
1413 | /* Check for channel and device errors presented */ |
1414 | rc = lcs_get_problem(cdev, irb); | |
1415 | if (rc || (dstat & DEV_STAT_UNIT_EXCEP)) { | |
c99fc5da KW |
1416 | dev_warn(&cdev->dev, |
1417 | "The LCS device stopped because of an error," | |
1418 | " dstat=0x%X, cstat=0x%X \n", | |
1419 | dstat, cstat); | |
27eb5ac8 | 1420 | if (rc) { |
59579da3 | 1421 | channel->state = LCS_CH_STATE_ERROR; |
27eb5ac8 KW |
1422 | } |
1423 | } | |
59579da3 KW |
1424 | if (channel->state == LCS_CH_STATE_ERROR) { |
1425 | lcs_schedule_recovery(card); | |
1426 | wake_up(&card->wait_q); | |
1427 | return; | |
1428 | } | |
1da177e4 | 1429 | /* How far in the ccw chain have we processed? */ |
9163bb2e | 1430 | if ((channel->state != LCS_CH_STATE_INIT) && |
9b3b9ab6 KW |
1431 | (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) && |
1432 | (irb->scsw.cmd.cpa != 0)) { | |
23d805b6 | 1433 | index = (struct ccw1 *) __va((addr_t) irb->scsw.cmd.cpa) |
1da177e4 | 1434 | - channel->ccws; |
23d805b6 PO |
1435 | if ((irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) || |
1436 | (irb->scsw.cmd.cstat & SCHN_STAT_PCI)) | |
1da177e4 LT |
1437 | /* Bloody io subsystem tells us lies about cpa... */ |
1438 | index = (index - 1) & (LCS_NUM_BUFFS - 1); | |
1439 | while (channel->io_idx != index) { | |
1440 | __lcs_processed_buffer(channel, | |
1441 | channel->iob + channel->io_idx); | |
1442 | channel->io_idx = | |
1443 | (channel->io_idx + 1) & (LCS_NUM_BUFFS - 1); | |
1444 | } | |
1445 | } | |
1446 | ||
23d805b6 PO |
1447 | if ((irb->scsw.cmd.dstat & DEV_STAT_DEV_END) || |
1448 | (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) || | |
1449 | (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)) | |
1da177e4 | 1450 | /* Mark channel as stopped. */ |
9163bb2e | 1451 | channel->state = LCS_CH_STATE_STOPPED; |
23d805b6 | 1452 | else if (irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) |
1da177e4 | 1453 | /* CCW execution stopped on a suspend bit. */ |
9163bb2e | 1454 | channel->state = LCS_CH_STATE_SUSPENDED; |
23d805b6 PO |
1455 | if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) { |
1456 | if (irb->scsw.cmd.cc != 0) { | |
1da177e4 LT |
1457 | ccw_device_halt(channel->ccwdev, (addr_t) channel); |
1458 | return; | |
1459 | } | |
1460 | /* The channel has been stopped by halt_IO. */ | |
9163bb2e | 1461 | channel->state = LCS_CH_STATE_HALTED; |
1da177e4 | 1462 | } |
23d805b6 | 1463 | if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) |
9163bb2e | 1464 | channel->state = LCS_CH_STATE_CLEARED; |
1da177e4 LT |
1465 | /* Do the rest in the tasklet. */ |
1466 | tasklet_schedule(&channel->irq_tasklet); | |
1467 | } | |
1468 | ||
1469 | /** | |
1470 | * Tasklet for IRQ handler | |
1471 | */ | |
1472 | static void | |
1473 | lcs_tasklet(unsigned long data) | |
1474 | { | |
1475 | unsigned long flags; | |
1476 | struct lcs_channel *channel; | |
1477 | struct lcs_buffer *iob; | |
1478 | int buf_idx; | |
1da177e4 LT |
1479 | |
1480 | channel = (struct lcs_channel *) data; | |
2a0217d5 | 1481 | LCS_DBF_TEXT_(5, trace, "tlet%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
1482 | |
1483 | /* Check for processed buffers. */ | |
1484 | iob = channel->iob; | |
1485 | buf_idx = channel->buf_idx; | |
9163bb2e | 1486 | while (iob[buf_idx].state == LCS_BUF_STATE_PROCESSED) { |
1da177e4 LT |
1487 | /* Do the callback thing. */ |
1488 | if (iob[buf_idx].callback != NULL) | |
1489 | iob[buf_idx].callback(channel, iob + buf_idx); | |
1490 | buf_idx = (buf_idx + 1) & (LCS_NUM_BUFFS - 1); | |
1491 | } | |
1492 | channel->buf_idx = buf_idx; | |
1493 | ||
9163bb2e | 1494 | if (channel->state == LCS_CH_STATE_STOPPED) |
424f73b3 | 1495 | lcs_start_channel(channel); |
1da177e4 | 1496 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
9163bb2e | 1497 | if (channel->state == LCS_CH_STATE_SUSPENDED && |
424f73b3 HC |
1498 | channel->iob[channel->io_idx].state == LCS_BUF_STATE_READY) |
1499 | __lcs_resume_channel(channel); | |
1da177e4 LT |
1500 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); |
1501 | ||
1502 | /* Something happened on the channel. Wake up waiters. */ | |
1503 | wake_up(&channel->wait_q); | |
1504 | } | |
1505 | ||
1506 | /** | |
1507 | * Finish current tx buffer and make it ready for transmit. | |
1508 | */ | |
1509 | static void | |
1510 | __lcs_emit_txbuffer(struct lcs_card *card) | |
1511 | { | |
1512 | LCS_DBF_TEXT(5, trace, "emittx"); | |
1513 | *(__u16 *)(card->tx_buffer->data + card->tx_buffer->count) = 0; | |
1514 | card->tx_buffer->count += 2; | |
1515 | lcs_ready_buffer(&card->write, card->tx_buffer); | |
1516 | card->tx_buffer = NULL; | |
1517 | card->tx_emitted++; | |
1518 | } | |
1519 | ||
1520 | /** | |
1521 | * Callback for finished tx buffers. | |
1522 | */ | |
1523 | static void | |
1524 | lcs_txbuffer_cb(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
1525 | { | |
1526 | struct lcs_card *card; | |
1527 | ||
1528 | LCS_DBF_TEXT(5, trace, "txbuffcb"); | |
1529 | /* Put buffer back to pool. */ | |
1530 | lcs_release_buffer(channel, buffer); | |
b385a144 | 1531 | card = container_of(channel, struct lcs_card, write); |
27eb5ac8 | 1532 | if (netif_queue_stopped(card->dev) && netif_carrier_ok(card->dev)) |
0d613a27 | 1533 | netif_wake_queue(card->dev); |
1da177e4 LT |
1534 | spin_lock(&card->lock); |
1535 | card->tx_emitted--; | |
1536 | if (card->tx_emitted <= 0 && card->tx_buffer != NULL) | |
1537 | /* | |
1538 | * Last running tx buffer has finished. Submit partially | |
1539 | * filled current buffer. | |
1540 | */ | |
1541 | __lcs_emit_txbuffer(card); | |
1542 | spin_unlock(&card->lock); | |
1543 | } | |
1544 | ||
1545 | /** | |
1546 | * Packet transmit function called by network stack | |
1547 | */ | |
1548 | static int | |
1549 | __lcs_start_xmit(struct lcs_card *card, struct sk_buff *skb, | |
1550 | struct net_device *dev) | |
1551 | { | |
1552 | struct lcs_header *header; | |
ec634fe3 | 1553 | int rc = NETDEV_TX_OK; |
1da177e4 LT |
1554 | |
1555 | LCS_DBF_TEXT(5, trace, "hardxmit"); | |
1556 | if (skb == NULL) { | |
1557 | card->stats.tx_dropped++; | |
1558 | card->stats.tx_errors++; | |
ec634fe3 | 1559 | return NETDEV_TX_OK; |
1da177e4 LT |
1560 | } |
1561 | if (card->state != DEV_STATE_UP) { | |
1562 | dev_kfree_skb(skb); | |
1563 | card->stats.tx_dropped++; | |
1564 | card->stats.tx_errors++; | |
1565 | card->stats.tx_carrier_errors++; | |
ec634fe3 | 1566 | return NETDEV_TX_OK; |
1da177e4 | 1567 | } |
27eb5ac8 KW |
1568 | if (skb->protocol == htons(ETH_P_IPV6)) { |
1569 | dev_kfree_skb(skb); | |
ec634fe3 | 1570 | return NETDEV_TX_OK; |
27eb5ac8 | 1571 | } |
0d613a27 FP |
1572 | netif_stop_queue(card->dev); |
1573 | spin_lock(&card->lock); | |
1da177e4 LT |
1574 | if (card->tx_buffer != NULL && |
1575 | card->tx_buffer->count + sizeof(struct lcs_header) + | |
1576 | skb->len + sizeof(u16) > LCS_IOBUFFERSIZE) | |
1577 | /* skb too big for current tx buffer. */ | |
1578 | __lcs_emit_txbuffer(card); | |
1579 | if (card->tx_buffer == NULL) { | |
1580 | /* Get new tx buffer */ | |
1581 | card->tx_buffer = lcs_get_buffer(&card->write); | |
1582 | if (card->tx_buffer == NULL) { | |
1583 | card->stats.tx_dropped++; | |
9e669d32 | 1584 | rc = NETDEV_TX_BUSY; |
0d613a27 | 1585 | goto out; |
1da177e4 LT |
1586 | } |
1587 | card->tx_buffer->callback = lcs_txbuffer_cb; | |
1588 | card->tx_buffer->count = 0; | |
1589 | } | |
1590 | header = (struct lcs_header *) | |
1591 | (card->tx_buffer->data + card->tx_buffer->count); | |
1592 | card->tx_buffer->count += skb->len + sizeof(struct lcs_header); | |
1593 | header->offset = card->tx_buffer->count; | |
1594 | header->type = card->lan_type; | |
1595 | header->slot = card->portno; | |
d626f62b | 1596 | skb_copy_from_linear_data(skb, header + 1, skb->len); |
0d613a27 | 1597 | spin_unlock(&card->lock); |
1da177e4 LT |
1598 | card->stats.tx_bytes += skb->len; |
1599 | card->stats.tx_packets++; | |
1600 | dev_kfree_skb(skb); | |
0d613a27 FP |
1601 | netif_wake_queue(card->dev); |
1602 | spin_lock(&card->lock); | |
1603 | if (card->tx_emitted <= 0 && card->tx_buffer != NULL) | |
1da177e4 LT |
1604 | /* If this is the first tx buffer emit it immediately. */ |
1605 | __lcs_emit_txbuffer(card); | |
0d613a27 FP |
1606 | out: |
1607 | spin_unlock(&card->lock); | |
1608 | return rc; | |
1da177e4 LT |
1609 | } |
1610 | ||
1611 | static int | |
1612 | lcs_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1613 | { | |
1614 | struct lcs_card *card; | |
1615 | int rc; | |
1616 | ||
1617 | LCS_DBF_TEXT(5, trace, "pktxmit"); | |
ad660e2f | 1618 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 | 1619 | rc = __lcs_start_xmit(card, skb, dev); |
1da177e4 LT |
1620 | return rc; |
1621 | } | |
1622 | ||
1623 | /** | |
1624 | * send startlan and lanstat command to make LCS device ready | |
1625 | */ | |
1626 | static int | |
1627 | lcs_startlan_auto(struct lcs_card *card) | |
1628 | { | |
1629 | int rc; | |
1630 | ||
1631 | LCS_DBF_TEXT(2, trace, "strtauto"); | |
1e495701 | 1632 | #ifdef CONFIG_ETHERNET |
1da177e4 LT |
1633 | card->lan_type = LCS_FRAME_TYPE_ENET; |
1634 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1635 | if (rc == 0) | |
1636 | return 0; | |
1637 | ||
1638 | #endif | |
1da177e4 LT |
1639 | #ifdef CONFIG_FDDI |
1640 | card->lan_type = LCS_FRAME_TYPE_FDDI; | |
1641 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1642 | if (rc == 0) | |
1643 | return 0; | |
1644 | #endif | |
1645 | return -EIO; | |
1646 | } | |
1647 | ||
1648 | static int | |
1649 | lcs_startlan(struct lcs_card *card) | |
1650 | { | |
1651 | int rc, i; | |
1652 | ||
1653 | LCS_DBF_TEXT(2, trace, "startlan"); | |
1654 | rc = 0; | |
1655 | if (card->portno != LCS_INVALID_PORT_NO) { | |
1656 | if (card->lan_type == LCS_FRAME_TYPE_AUTO) | |
1657 | rc = lcs_startlan_auto(card); | |
1658 | else | |
1659 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1660 | } else { | |
1661 | for (i = 0; i <= 16; i++) { | |
1662 | card->portno = i; | |
1663 | if (card->lan_type != LCS_FRAME_TYPE_AUTO) | |
1664 | rc = lcs_send_startlan(card, | |
1665 | LCS_INITIATOR_TCPIP); | |
1666 | else | |
1667 | /* autodetecting lan type */ | |
1668 | rc = lcs_startlan_auto(card); | |
1669 | if (rc == 0) | |
1670 | break; | |
1671 | } | |
1672 | } | |
1673 | if (rc == 0) | |
1674 | return lcs_send_lanstat(card); | |
1675 | return rc; | |
1676 | } | |
1677 | ||
1678 | /** | |
1679 | * LCS detect function | |
1680 | * setup channels and make them I/O ready | |
1681 | */ | |
1682 | static int | |
1683 | lcs_detect(struct lcs_card *card) | |
1684 | { | |
1685 | int rc = 0; | |
1686 | ||
1687 | LCS_DBF_TEXT(2, setup, "lcsdetct"); | |
1688 | /* start/reset card */ | |
1689 | if (card->dev) | |
1690 | netif_stop_queue(card->dev); | |
1691 | rc = lcs_stop_channels(card); | |
1692 | if (rc == 0) { | |
1693 | rc = lcs_start_channels(card); | |
1694 | if (rc == 0) { | |
1695 | rc = lcs_send_startup(card, LCS_INITIATOR_TCPIP); | |
1696 | if (rc == 0) | |
1697 | rc = lcs_startlan(card); | |
1698 | } | |
1699 | } | |
1700 | if (rc == 0) { | |
1701 | card->state = DEV_STATE_UP; | |
1702 | } else { | |
1703 | card->state = DEV_STATE_DOWN; | |
9163bb2e UB |
1704 | card->write.state = LCS_CH_STATE_INIT; |
1705 | card->read.state = LCS_CH_STATE_INIT; | |
1da177e4 LT |
1706 | } |
1707 | return rc; | |
1708 | } | |
1709 | ||
1da177e4 LT |
1710 | /** |
1711 | * LCS Stop card | |
1712 | */ | |
1713 | static int | |
1714 | lcs_stopcard(struct lcs_card *card) | |
1715 | { | |
1716 | int rc; | |
1717 | ||
1718 | LCS_DBF_TEXT(3, setup, "stopcard"); | |
1719 | ||
9163bb2e UB |
1720 | if (card->read.state != LCS_CH_STATE_STOPPED && |
1721 | card->write.state != LCS_CH_STATE_STOPPED && | |
59579da3 KW |
1722 | card->read.state != LCS_CH_STATE_ERROR && |
1723 | card->write.state != LCS_CH_STATE_ERROR && | |
1da177e4 LT |
1724 | card->state == DEV_STATE_UP) { |
1725 | lcs_clear_multicast_list(card); | |
1726 | rc = lcs_send_stoplan(card,LCS_INITIATOR_TCPIP); | |
1727 | rc = lcs_send_shutdown(card); | |
1728 | } | |
1729 | rc = lcs_stop_channels(card); | |
1730 | card->state = DEV_STATE_DOWN; | |
1731 | ||
1732 | return rc; | |
1733 | } | |
1734 | ||
1da177e4 LT |
1735 | /** |
1736 | * Kernel Thread helper functions for LGW initiated commands | |
1737 | */ | |
1738 | static void | |
4927b3f7 | 1739 | lcs_start_kernel_thread(struct work_struct *work) |
1da177e4 | 1740 | { |
4927b3f7 | 1741 | struct lcs_card *card = container_of(work, struct lcs_card, kernel_thread_starter); |
1da177e4 | 1742 | LCS_DBF_TEXT(5, trace, "krnthrd"); |
27eb5ac8 | 1743 | if (lcs_do_start_thread(card, LCS_RECOVERY_THREAD)) |
e5b5719b | 1744 | kthread_run(lcs_recovery, card, "lcs_recover"); |
1da177e4 LT |
1745 | #ifdef CONFIG_IP_MULTICAST |
1746 | if (lcs_do_start_thread(card, LCS_SET_MC_THREAD)) | |
e5b5719b | 1747 | kthread_run(lcs_register_mc_addresses, card, "regipm"); |
1da177e4 LT |
1748 | #endif |
1749 | } | |
1750 | ||
1751 | /** | |
1752 | * Process control frames. | |
1753 | */ | |
1754 | static void | |
1755 | lcs_get_control(struct lcs_card *card, struct lcs_cmd *cmd) | |
1756 | { | |
1757 | LCS_DBF_TEXT(5, trace, "getctrl"); | |
1758 | if (cmd->initiator == LCS_INITIATOR_LGW) { | |
1759 | switch(cmd->cmd_code) { | |
1760 | case LCS_CMD_STARTUP: | |
1da177e4 | 1761 | case LCS_CMD_STARTLAN: |
27eb5ac8 | 1762 | lcs_schedule_recovery(card); |
1da177e4 LT |
1763 | break; |
1764 | case LCS_CMD_STOPLAN: | |
c99fc5da KW |
1765 | pr_warning("Stoplan for %s initiated by LGW.\n", |
1766 | card->dev->name); | |
27eb5ac8 KW |
1767 | if (card->dev) |
1768 | netif_carrier_off(card->dev); | |
1da177e4 LT |
1769 | break; |
1770 | default: | |
6b648063 | 1771 | LCS_DBF_TEXT(5, trace, "noLGWcmd"); |
1da177e4 LT |
1772 | break; |
1773 | } | |
1774 | } else | |
1775 | lcs_notify_lancmd_waiters(card, cmd); | |
1776 | } | |
1777 | ||
1778 | /** | |
1779 | * Unpack network packet. | |
1780 | */ | |
1781 | static void | |
1782 | lcs_get_skb(struct lcs_card *card, char *skb_data, unsigned int skb_len) | |
1783 | { | |
1784 | struct sk_buff *skb; | |
1785 | ||
1786 | LCS_DBF_TEXT(5, trace, "getskb"); | |
1787 | if (card->dev == NULL || | |
1788 | card->state != DEV_STATE_UP) | |
1789 | /* The card isn't up. Ignore the packet. */ | |
1790 | return; | |
1791 | ||
1792 | skb = dev_alloc_skb(skb_len); | |
1793 | if (skb == NULL) { | |
c99fc5da KW |
1794 | dev_err(&card->dev->dev, |
1795 | " Allocating a socket buffer to interface %s failed\n", | |
1da177e4 LT |
1796 | card->dev->name); |
1797 | card->stats.rx_dropped++; | |
1798 | return; | |
1799 | } | |
1da177e4 LT |
1800 | memcpy(skb_put(skb, skb_len), skb_data, skb_len); |
1801 | skb->protocol = card->lan_type_trans(skb, card->dev); | |
1802 | card->stats.rx_bytes += skb_len; | |
1803 | card->stats.rx_packets++; | |
93ad37d9 KW |
1804 | if (skb->protocol == htons(ETH_P_802_2)) |
1805 | *((__u32 *)skb->cb) = ++card->pkt_seq; | |
1da177e4 LT |
1806 | netif_rx(skb); |
1807 | } | |
1808 | ||
1809 | /** | |
1810 | * LCS main routine to get packets and lancmd replies from the buffers | |
1811 | */ | |
1812 | static void | |
1813 | lcs_get_frames_cb(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
1814 | { | |
1815 | struct lcs_card *card; | |
1816 | struct lcs_header *lcs_hdr; | |
1817 | __u16 offset; | |
1818 | ||
1819 | LCS_DBF_TEXT(5, trace, "lcsgtpkt"); | |
1820 | lcs_hdr = (struct lcs_header *) buffer->data; | |
1821 | if (lcs_hdr->offset == LCS_ILLEGAL_OFFSET) { | |
1822 | LCS_DBF_TEXT(4, trace, "-eiogpkt"); | |
1823 | return; | |
1824 | } | |
b385a144 | 1825 | card = container_of(channel, struct lcs_card, read); |
1da177e4 LT |
1826 | offset = 0; |
1827 | while (lcs_hdr->offset != 0) { | |
1828 | if (lcs_hdr->offset <= 0 || | |
1829 | lcs_hdr->offset > LCS_IOBUFFERSIZE || | |
1830 | lcs_hdr->offset < offset) { | |
1831 | /* Offset invalid. */ | |
1832 | card->stats.rx_length_errors++; | |
1833 | card->stats.rx_errors++; | |
1834 | return; | |
1835 | } | |
1836 | /* What kind of frame is it? */ | |
1837 | if (lcs_hdr->type == LCS_FRAME_TYPE_CONTROL) | |
1838 | /* Control frame. */ | |
1839 | lcs_get_control(card, (struct lcs_cmd *) lcs_hdr); | |
1840 | else if (lcs_hdr->type == LCS_FRAME_TYPE_ENET || | |
1841 | lcs_hdr->type == LCS_FRAME_TYPE_TR || | |
1842 | lcs_hdr->type == LCS_FRAME_TYPE_FDDI) | |
1843 | /* Normal network packet. */ | |
1844 | lcs_get_skb(card, (char *)(lcs_hdr + 1), | |
1845 | lcs_hdr->offset - offset - | |
1846 | sizeof(struct lcs_header)); | |
1847 | else | |
1848 | /* Unknown frame type. */ | |
1849 | ; // FIXME: error message ? | |
1850 | /* Proceed to next frame. */ | |
1851 | offset = lcs_hdr->offset; | |
1852 | lcs_hdr->offset = LCS_ILLEGAL_OFFSET; | |
1853 | lcs_hdr = (struct lcs_header *) (buffer->data + offset); | |
1854 | } | |
1855 | /* The buffer is now empty. Make it ready again. */ | |
1856 | lcs_ready_buffer(&card->read, buffer); | |
1857 | } | |
1858 | ||
1859 | /** | |
1860 | * get network statistics for ifconfig and other user programs | |
1861 | */ | |
1862 | static struct net_device_stats * | |
1863 | lcs_getstats(struct net_device *dev) | |
1864 | { | |
1865 | struct lcs_card *card; | |
1866 | ||
1867 | LCS_DBF_TEXT(4, trace, "netstats"); | |
ad660e2f | 1868 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 LT |
1869 | return &card->stats; |
1870 | } | |
1871 | ||
1872 | /** | |
1873 | * stop lcs device | |
1874 | * This function will be called by user doing ifconfig xxx down | |
1875 | */ | |
1876 | static int | |
1877 | lcs_stop_device(struct net_device *dev) | |
1878 | { | |
1879 | struct lcs_card *card; | |
1880 | int rc; | |
1881 | ||
1882 | LCS_DBF_TEXT(2, trace, "stopdev"); | |
ad660e2f | 1883 | card = (struct lcs_card *) dev->ml_priv; |
27eb5ac8 KW |
1884 | netif_carrier_off(dev); |
1885 | netif_tx_disable(dev); | |
1da177e4 | 1886 | dev->flags &= ~IFF_UP; |
27eb5ac8 | 1887 | wait_event(card->write.wait_q, |
9163bb2e | 1888 | (card->write.state != LCS_CH_STATE_RUNNING)); |
1da177e4 LT |
1889 | rc = lcs_stopcard(card); |
1890 | if (rc) | |
c99fc5da KW |
1891 | dev_err(&card->dev->dev, |
1892 | " Shutting down the LCS device failed\n "); | |
1da177e4 LT |
1893 | return rc; |
1894 | } | |
1895 | ||
1896 | /** | |
1897 | * start lcs device and make it runnable | |
1898 | * This function will be called by user doing ifconfig xxx up | |
1899 | */ | |
1900 | static int | |
1901 | lcs_open_device(struct net_device *dev) | |
1902 | { | |
1903 | struct lcs_card *card; | |
1904 | int rc; | |
1905 | ||
1906 | LCS_DBF_TEXT(2, trace, "opendev"); | |
ad660e2f | 1907 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 LT |
1908 | /* initialize statistics */ |
1909 | rc = lcs_detect(card); | |
1910 | if (rc) { | |
c99fc5da | 1911 | pr_err("Error in opening device!\n"); |
1da177e4 LT |
1912 | |
1913 | } else { | |
1914 | dev->flags |= IFF_UP; | |
27eb5ac8 | 1915 | netif_carrier_on(dev); |
1da177e4 LT |
1916 | netif_wake_queue(dev); |
1917 | card->state = DEV_STATE_UP; | |
1918 | } | |
1919 | return rc; | |
1920 | } | |
1921 | ||
1922 | /** | |
1923 | * show function for portno called by cat or similar things | |
1924 | */ | |
1925 | static ssize_t | |
3fd3c0a5 | 1926 | lcs_portno_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1927 | { |
1928 | struct lcs_card *card; | |
1929 | ||
dff59b64 | 1930 | card = dev_get_drvdata(dev); |
1da177e4 LT |
1931 | |
1932 | if (!card) | |
1933 | return 0; | |
1934 | ||
1935 | return sprintf(buf, "%d\n", card->portno); | |
1936 | } | |
1937 | ||
1938 | /** | |
1939 | * store the value which is piped to file portno | |
1940 | */ | |
1941 | static ssize_t | |
3fd3c0a5 | 1942 | lcs_portno_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1943 | { |
1944 | struct lcs_card *card; | |
1945 | int value; | |
1946 | ||
dff59b64 | 1947 | card = dev_get_drvdata(dev); |
1da177e4 LT |
1948 | |
1949 | if (!card) | |
1950 | return 0; | |
1951 | ||
1952 | sscanf(buf, "%u", &value); | |
1953 | /* TODO: sanity checks */ | |
1954 | card->portno = value; | |
1955 | ||
1956 | return count; | |
1957 | ||
1958 | } | |
1959 | ||
1960 | static DEVICE_ATTR(portno, 0644, lcs_portno_show, lcs_portno_store); | |
1961 | ||
c4736d96 | 1962 | static const char *lcs_type[] = { |
0ca8cc6f UB |
1963 | "not a channel", |
1964 | "2216 parallel", | |
1965 | "2216 channel", | |
1966 | "OSA LCS card", | |
1967 | "unknown channel type", | |
1968 | "unsupported channel type", | |
1969 | }; | |
1970 | ||
1da177e4 | 1971 | static ssize_t |
3fd3c0a5 | 1972 | lcs_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1973 | { |
1974 | struct ccwgroup_device *cgdev; | |
1975 | ||
1976 | cgdev = to_ccwgroupdev(dev); | |
1977 | if (!cgdev) | |
1978 | return -ENODEV; | |
1979 | ||
0ca8cc6f | 1980 | return sprintf(buf, "%s\n", lcs_type[cgdev->cdev[0]->id.driver_info]); |
1da177e4 LT |
1981 | } |
1982 | ||
1983 | static DEVICE_ATTR(type, 0444, lcs_type_show, NULL); | |
1984 | ||
1985 | static ssize_t | |
3fd3c0a5 | 1986 | lcs_timeout_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1987 | { |
1988 | struct lcs_card *card; | |
1989 | ||
dff59b64 | 1990 | card = dev_get_drvdata(dev); |
1da177e4 LT |
1991 | |
1992 | return card ? sprintf(buf, "%u\n", card->lancmd_timeout) : 0; | |
1993 | } | |
1994 | ||
1995 | static ssize_t | |
3fd3c0a5 | 1996 | lcs_timeout_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1997 | { |
1998 | struct lcs_card *card; | |
1999 | int value; | |
2000 | ||
dff59b64 | 2001 | card = dev_get_drvdata(dev); |
1da177e4 LT |
2002 | |
2003 | if (!card) | |
2004 | return 0; | |
2005 | ||
2006 | sscanf(buf, "%u", &value); | |
2007 | /* TODO: sanity checks */ | |
2008 | card->lancmd_timeout = value; | |
2009 | ||
2010 | return count; | |
2011 | ||
2012 | } | |
2013 | ||
2b67fc46 | 2014 | static DEVICE_ATTR(lancmd_timeout, 0644, lcs_timeout_show, lcs_timeout_store); |
1da177e4 | 2015 | |
27eb5ac8 | 2016 | static ssize_t |
e82b0f2c | 2017 | lcs_dev_recover_store(struct device *dev, struct device_attribute *attr, |
27eb5ac8 KW |
2018 | const char *buf, size_t count) |
2019 | { | |
dff59b64 | 2020 | struct lcs_card *card = dev_get_drvdata(dev); |
27eb5ac8 KW |
2021 | char *tmp; |
2022 | int i; | |
2023 | ||
2024 | if (!card) | |
2025 | return -EINVAL; | |
2026 | if (card->state != DEV_STATE_UP) | |
2027 | return -EPERM; | |
2028 | i = simple_strtoul(buf, &tmp, 16); | |
2029 | if (i == 1) | |
2030 | lcs_schedule_recovery(card); | |
2031 | return count; | |
2032 | } | |
2033 | ||
2034 | static DEVICE_ATTR(recover, 0200, NULL, lcs_dev_recover_store); | |
2035 | ||
1da177e4 LT |
2036 | static struct attribute * lcs_attrs[] = { |
2037 | &dev_attr_portno.attr, | |
2038 | &dev_attr_type.attr, | |
2039 | &dev_attr_lancmd_timeout.attr, | |
27eb5ac8 | 2040 | &dev_attr_recover.attr, |
1da177e4 LT |
2041 | NULL, |
2042 | }; | |
1da177e4 LT |
2043 | static struct attribute_group lcs_attr_group = { |
2044 | .attrs = lcs_attrs, | |
2045 | }; | |
00d5bdd1 SO |
2046 | static const struct attribute_group *lcs_attr_groups[] = { |
2047 | &lcs_attr_group, | |
2048 | NULL, | |
2049 | }; | |
2050 | static const struct device_type lcs_devtype = { | |
2051 | .name = "lcs", | |
2052 | .groups = lcs_attr_groups, | |
2053 | }; | |
1da177e4 LT |
2054 | |
2055 | /** | |
2056 | * lcs_probe_device is called on establishing a new ccwgroup_device. | |
2057 | */ | |
2058 | static int | |
2059 | lcs_probe_device(struct ccwgroup_device *ccwgdev) | |
2060 | { | |
2061 | struct lcs_card *card; | |
1da177e4 LT |
2062 | |
2063 | if (!get_device(&ccwgdev->dev)) | |
2064 | return -ENODEV; | |
2065 | ||
2066 | LCS_DBF_TEXT(2, setup, "add_dev"); | |
2067 | card = lcs_alloc_card(); | |
2068 | if (!card) { | |
6b648063 | 2069 | LCS_DBF_TEXT_(2, setup, " rc%d", -ENOMEM); |
1da177e4 LT |
2070 | put_device(&ccwgdev->dev); |
2071 | return -ENOMEM; | |
2072 | } | |
dff59b64 | 2073 | dev_set_drvdata(&ccwgdev->dev, card); |
1da177e4 LT |
2074 | ccwgdev->cdev[0]->handler = lcs_irq; |
2075 | ccwgdev->cdev[1]->handler = lcs_irq; | |
27eb5ac8 | 2076 | card->gdev = ccwgdev; |
4927b3f7 | 2077 | INIT_WORK(&card->kernel_thread_starter, lcs_start_kernel_thread); |
27eb5ac8 KW |
2078 | card->thread_start_mask = 0; |
2079 | card->thread_allowed_mask = 0; | |
2080 | card->thread_running_mask = 0; | |
00d5bdd1 SO |
2081 | ccwgdev->dev.type = &lcs_devtype; |
2082 | ||
2083 | return 0; | |
1da177e4 LT |
2084 | } |
2085 | ||
2086 | static int | |
2087 | lcs_register_netdev(struct ccwgroup_device *ccwgdev) | |
2088 | { | |
2089 | struct lcs_card *card; | |
2090 | ||
2091 | LCS_DBF_TEXT(2, setup, "regnetdv"); | |
dff59b64 | 2092 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2093 | if (card->dev->reg_state != NETREG_UNINITIALIZED) |
2094 | return 0; | |
2095 | SET_NETDEV_DEV(card->dev, &ccwgdev->dev); | |
2096 | return register_netdev(card->dev); | |
2097 | } | |
2098 | ||
2099 | /** | |
2100 | * lcs_new_device will be called by setting the group device online. | |
2101 | */ | |
0e0b46d8 FB |
2102 | static const struct net_device_ops lcs_netdev_ops = { |
2103 | .ndo_open = lcs_open_device, | |
2104 | .ndo_stop = lcs_stop_device, | |
2105 | .ndo_get_stats = lcs_getstats, | |
2106 | .ndo_start_xmit = lcs_start_xmit, | |
2107 | }; | |
2108 | ||
2109 | static const struct net_device_ops lcs_mc_netdev_ops = { | |
2110 | .ndo_open = lcs_open_device, | |
2111 | .ndo_stop = lcs_stop_device, | |
2112 | .ndo_get_stats = lcs_getstats, | |
2113 | .ndo_start_xmit = lcs_start_xmit, | |
afc4b13d | 2114 | .ndo_set_rx_mode = lcs_set_multicast_list, |
0e0b46d8 | 2115 | }; |
1da177e4 LT |
2116 | |
2117 | static int | |
2118 | lcs_new_device(struct ccwgroup_device *ccwgdev) | |
2119 | { | |
2120 | struct lcs_card *card; | |
2121 | struct net_device *dev=NULL; | |
2122 | enum lcs_dev_states recover_state; | |
2123 | int rc; | |
2124 | ||
dff59b64 | 2125 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2126 | if (!card) |
2127 | return -ENODEV; | |
2128 | ||
2129 | LCS_DBF_TEXT(2, setup, "newdev"); | |
2130 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2131 | card->read.ccwdev = ccwgdev->cdev[0]; | |
2132 | card->write.ccwdev = ccwgdev->cdev[1]; | |
2133 | ||
2134 | recover_state = card->state; | |
d816d423 KDW |
2135 | rc = ccw_device_set_online(card->read.ccwdev); |
2136 | if (rc) | |
2137 | goto out_err; | |
2138 | rc = ccw_device_set_online(card->write.ccwdev); | |
2139 | if (rc) | |
2140 | goto out_werr; | |
1da177e4 LT |
2141 | |
2142 | LCS_DBF_TEXT(3, setup, "lcsnewdv"); | |
2143 | ||
2144 | lcs_setup_card(card); | |
2145 | rc = lcs_detect(card); | |
2146 | if (rc) { | |
2147 | LCS_DBF_TEXT(2, setup, "dtctfail"); | |
c99fc5da KW |
2148 | dev_err(&card->dev->dev, |
2149 | "Detecting a network adapter for LCS devices" | |
2150 | " failed with rc=%d (0x%x)\n", rc, rc); | |
1da177e4 LT |
2151 | lcs_stopcard(card); |
2152 | goto out; | |
2153 | } | |
2154 | if (card->dev) { | |
2155 | LCS_DBF_TEXT(2, setup, "samedev"); | |
2156 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2157 | goto netdev_out; | |
2158 | } | |
2159 | switch (card->lan_type) { | |
1e495701 | 2160 | #ifdef CONFIG_ETHERNET |
1da177e4 LT |
2161 | case LCS_FRAME_TYPE_ENET: |
2162 | card->lan_type_trans = eth_type_trans; | |
2163 | dev = alloc_etherdev(0); | |
2164 | break; | |
2165 | #endif | |
1da177e4 LT |
2166 | #ifdef CONFIG_FDDI |
2167 | case LCS_FRAME_TYPE_FDDI: | |
2168 | card->lan_type_trans = fddi_type_trans; | |
2169 | dev = alloc_fddidev(0); | |
2170 | break; | |
2171 | #endif | |
2172 | default: | |
2173 | LCS_DBF_TEXT(3, setup, "errinit"); | |
c99fc5da | 2174 | pr_err(" Initialization failed\n"); |
1da177e4 LT |
2175 | goto out; |
2176 | } | |
2177 | if (!dev) | |
2178 | goto out; | |
2179 | card->dev = dev; | |
ad660e2f | 2180 | card->dev->ml_priv = card; |
0e0b46d8 | 2181 | card->dev->netdev_ops = &lcs_netdev_ops; |
1da177e4 LT |
2182 | memcpy(card->dev->dev_addr, card->mac, LCS_MAC_LENGTH); |
2183 | #ifdef CONFIG_IP_MULTICAST | |
2184 | if (!lcs_check_multicast_support(card)) | |
0e0b46d8 | 2185 | card->dev->netdev_ops = &lcs_mc_netdev_ops; |
1da177e4 | 2186 | #endif |
b5f9d55b | 2187 | netdev_out: |
1da177e4 LT |
2188 | lcs_set_allowed_threads(card,0xffffffff); |
2189 | if (recover_state == DEV_STATE_RECOVER) { | |
2190 | lcs_set_multicast_list(card->dev); | |
2191 | card->dev->flags |= IFF_UP; | |
27eb5ac8 | 2192 | netif_carrier_on(card->dev); |
1da177e4 LT |
2193 | netif_wake_queue(card->dev); |
2194 | card->state = DEV_STATE_UP; | |
b5f9d55b | 2195 | } else { |
1da177e4 | 2196 | lcs_stopcard(card); |
b5f9d55b | 2197 | } |
1da177e4 | 2198 | |
b5f9d55b FP |
2199 | if (lcs_register_netdev(ccwgdev) != 0) |
2200 | goto out; | |
2201 | ||
2202 | /* Print out supported assists: IPv6 */ | |
c99fc5da KW |
2203 | pr_info("LCS device %s %s IPv6 support\n", card->dev->name, |
2204 | (card->ip_assists_supported & LCS_IPASS_IPV6_SUPPORT) ? | |
2205 | "with" : "without"); | |
b5f9d55b | 2206 | /* Print out supported assist: Multicast */ |
c99fc5da KW |
2207 | pr_info("LCS device %s %s Multicast support\n", card->dev->name, |
2208 | (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) ? | |
2209 | "with" : "without"); | |
1da177e4 LT |
2210 | return 0; |
2211 | out: | |
2212 | ||
1da177e4 | 2213 | ccw_device_set_offline(card->write.ccwdev); |
d816d423 KDW |
2214 | out_werr: |
2215 | ccw_device_set_offline(card->read.ccwdev); | |
2216 | out_err: | |
1da177e4 LT |
2217 | return -ENODEV; |
2218 | } | |
2219 | ||
2220 | /** | |
2221 | * lcs_shutdown_device, called when setting the group device offline. | |
2222 | */ | |
2223 | static int | |
27eb5ac8 | 2224 | __lcs_shutdown_device(struct ccwgroup_device *ccwgdev, int recovery_mode) |
1da177e4 LT |
2225 | { |
2226 | struct lcs_card *card; | |
2227 | enum lcs_dev_states recover_state; | |
e427babe | 2228 | int ret = 0, ret2 = 0, ret3 = 0; |
1da177e4 LT |
2229 | |
2230 | LCS_DBF_TEXT(3, setup, "shtdndev"); | |
dff59b64 | 2231 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2232 | if (!card) |
2233 | return -ENODEV; | |
27eb5ac8 KW |
2234 | if (recovery_mode == 0) { |
2235 | lcs_set_allowed_threads(card, 0); | |
2236 | if (lcs_wait_for_threads(card, LCS_SET_MC_THREAD)) | |
2237 | return -ERESTARTSYS; | |
2238 | } | |
1da177e4 LT |
2239 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); |
2240 | recover_state = card->state; | |
2241 | ||
2242 | ret = lcs_stop_device(card->dev); | |
e427babe KDW |
2243 | ret2 = ccw_device_set_offline(card->read.ccwdev); |
2244 | ret3 = ccw_device_set_offline(card->write.ccwdev); | |
2245 | if (!ret) | |
2246 | ret = (ret2) ? ret2 : ret3; | |
2247 | if (ret) | |
2248 | LCS_DBF_TEXT_(3, setup, "1err:%d", ret); | |
1da177e4 LT |
2249 | if (recover_state == DEV_STATE_UP) { |
2250 | card->state = DEV_STATE_RECOVER; | |
2251 | } | |
1da177e4 LT |
2252 | return 0; |
2253 | } | |
2254 | ||
27eb5ac8 KW |
2255 | static int |
2256 | lcs_shutdown_device(struct ccwgroup_device *ccwgdev) | |
2257 | { | |
2258 | return __lcs_shutdown_device(ccwgdev, 0); | |
2259 | } | |
2260 | ||
2261 | /** | |
2262 | * drive lcs recovery after startup and startlan initiated by Lan Gateway | |
2263 | */ | |
2264 | static int | |
2265 | lcs_recovery(void *ptr) | |
2266 | { | |
2267 | struct lcs_card *card; | |
2268 | struct ccwgroup_device *gdev; | |
2269 | int rc; | |
2270 | ||
2271 | card = (struct lcs_card *) ptr; | |
27eb5ac8 KW |
2272 | |
2273 | LCS_DBF_TEXT(4, trace, "recover1"); | |
2274 | if (!lcs_do_run_thread(card, LCS_RECOVERY_THREAD)) | |
2275 | return 0; | |
2276 | LCS_DBF_TEXT(4, trace, "recover2"); | |
2277 | gdev = card->gdev; | |
c99fc5da KW |
2278 | dev_warn(&gdev->dev, |
2279 | "A recovery process has been started for the LCS device\n"); | |
27eb5ac8 KW |
2280 | rc = __lcs_shutdown_device(gdev, 1); |
2281 | rc = lcs_new_device(gdev); | |
2282 | if (!rc) | |
c99fc5da KW |
2283 | pr_info("Device %s successfully recovered!\n", |
2284 | card->dev->name); | |
27eb5ac8 | 2285 | else |
c99fc5da KW |
2286 | pr_info("Device %s could not be recovered!\n", |
2287 | card->dev->name); | |
27eb5ac8 KW |
2288 | lcs_clear_thread_running_bit(card, LCS_RECOVERY_THREAD); |
2289 | return 0; | |
2290 | } | |
2291 | ||
1da177e4 LT |
2292 | /** |
2293 | * lcs_remove_device, free buffers and card | |
2294 | */ | |
2295 | static void | |
2296 | lcs_remove_device(struct ccwgroup_device *ccwgdev) | |
2297 | { | |
2298 | struct lcs_card *card; | |
2299 | ||
dff59b64 | 2300 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2301 | if (!card) |
2302 | return; | |
2303 | ||
1da177e4 LT |
2304 | LCS_DBF_TEXT(3, setup, "remdev"); |
2305 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2306 | if (ccwgdev->state == CCWGROUP_ONLINE) { | |
2307 | lcs_shutdown_device(ccwgdev); | |
2308 | } | |
2309 | if (card->dev) | |
2310 | unregister_netdev(card->dev); | |
1da177e4 LT |
2311 | lcs_cleanup_card(card); |
2312 | lcs_free_card(card); | |
00d5bdd1 | 2313 | dev_set_drvdata(&ccwgdev->dev, NULL); |
1da177e4 LT |
2314 | put_device(&ccwgdev->dev); |
2315 | } | |
2316 | ||
cbb2aec3 KDW |
2317 | static int lcs_pm_suspend(struct lcs_card *card) |
2318 | { | |
2319 | if (card->dev) | |
2320 | netif_device_detach(card->dev); | |
2321 | lcs_set_allowed_threads(card, 0); | |
2322 | lcs_wait_for_threads(card, 0xffffffff); | |
2323 | if (card->state != DEV_STATE_DOWN) | |
2324 | __lcs_shutdown_device(card->gdev, 1); | |
2325 | return 0; | |
2326 | } | |
2327 | ||
2328 | static int lcs_pm_resume(struct lcs_card *card) | |
2329 | { | |
2330 | int rc = 0; | |
2331 | ||
2332 | if (card->state == DEV_STATE_RECOVER) | |
2333 | rc = lcs_new_device(card->gdev); | |
2334 | if (card->dev) | |
2335 | netif_device_attach(card->dev); | |
2336 | if (rc) { | |
2337 | dev_warn(&card->gdev->dev, "The lcs device driver " | |
2338 | "failed to recover the device\n"); | |
2339 | } | |
2340 | return rc; | |
2341 | } | |
2342 | ||
2343 | static int lcs_prepare(struct ccwgroup_device *gdev) | |
2344 | { | |
2345 | return 0; | |
2346 | } | |
2347 | ||
2348 | static void lcs_complete(struct ccwgroup_device *gdev) | |
2349 | { | |
2350 | return; | |
2351 | } | |
2352 | ||
2353 | static int lcs_freeze(struct ccwgroup_device *gdev) | |
2354 | { | |
2355 | struct lcs_card *card = dev_get_drvdata(&gdev->dev); | |
2356 | return lcs_pm_suspend(card); | |
2357 | } | |
2358 | ||
2359 | static int lcs_thaw(struct ccwgroup_device *gdev) | |
2360 | { | |
2361 | struct lcs_card *card = dev_get_drvdata(&gdev->dev); | |
2362 | return lcs_pm_resume(card); | |
2363 | } | |
2364 | ||
2365 | static int lcs_restore(struct ccwgroup_device *gdev) | |
2366 | { | |
2367 | struct lcs_card *card = dev_get_drvdata(&gdev->dev); | |
2368 | return lcs_pm_resume(card); | |
2369 | } | |
2370 | ||
0ca8cc6f UB |
2371 | static struct ccw_device_id lcs_ids[] = { |
2372 | {CCW_DEVICE(0x3088, 0x08), .driver_info = lcs_channel_type_parallel}, | |
2373 | {CCW_DEVICE(0x3088, 0x1f), .driver_info = lcs_channel_type_2216}, | |
2374 | {CCW_DEVICE(0x3088, 0x60), .driver_info = lcs_channel_type_osa2}, | |
2375 | {}, | |
2376 | }; | |
2377 | MODULE_DEVICE_TABLE(ccw, lcs_ids); | |
2378 | ||
2379 | static struct ccw_driver lcs_ccw_driver = { | |
3bda058b SO |
2380 | .driver = { |
2381 | .owner = THIS_MODULE, | |
2382 | .name = "lcs", | |
2383 | }, | |
0ca8cc6f UB |
2384 | .ids = lcs_ids, |
2385 | .probe = ccwgroup_probe_ccwdev, | |
2386 | .remove = ccwgroup_remove_ccwdev, | |
420f42ec | 2387 | .int_class = IRQIO_LCS, |
0ca8cc6f UB |
2388 | }; |
2389 | ||
1da177e4 LT |
2390 | /** |
2391 | * LCS ccwgroup driver registration | |
2392 | */ | |
2393 | static struct ccwgroup_driver lcs_group_driver = { | |
3c190c51 SO |
2394 | .driver = { |
2395 | .owner = THIS_MODULE, | |
2396 | .name = "lcs", | |
2397 | }, | |
00d5bdd1 | 2398 | .setup = lcs_probe_device, |
1da177e4 LT |
2399 | .remove = lcs_remove_device, |
2400 | .set_online = lcs_new_device, | |
2401 | .set_offline = lcs_shutdown_device, | |
cbb2aec3 KDW |
2402 | .prepare = lcs_prepare, |
2403 | .complete = lcs_complete, | |
2404 | .freeze = lcs_freeze, | |
2405 | .thaw = lcs_thaw, | |
2406 | .restore = lcs_restore, | |
1da177e4 LT |
2407 | }; |
2408 | ||
00d5bdd1 SO |
2409 | static ssize_t lcs_driver_group_store(struct device_driver *ddrv, |
2410 | const char *buf, size_t count) | |
0ca8cc6f UB |
2411 | { |
2412 | int err; | |
9814fdfb | 2413 | err = ccwgroup_create_dev(lcs_root_dev, &lcs_group_driver, 2, buf); |
0ca8cc6f UB |
2414 | return err ? err : count; |
2415 | } | |
0ca8cc6f UB |
2416 | static DRIVER_ATTR(group, 0200, NULL, lcs_driver_group_store); |
2417 | ||
9d2aa0aa | 2418 | static struct attribute *lcs_drv_attrs[] = { |
0ca8cc6f UB |
2419 | &driver_attr_group.attr, |
2420 | NULL, | |
2421 | }; | |
9d2aa0aa SO |
2422 | static struct attribute_group lcs_drv_attr_group = { |
2423 | .attrs = lcs_drv_attrs, | |
0ca8cc6f | 2424 | }; |
9d2aa0aa SO |
2425 | static const struct attribute_group *lcs_drv_attr_groups[] = { |
2426 | &lcs_drv_attr_group, | |
0ca8cc6f UB |
2427 | NULL, |
2428 | }; | |
2429 | ||
1da177e4 LT |
2430 | /** |
2431 | * LCS Module/Kernel initialization function | |
2432 | */ | |
2433 | static int | |
2434 | __init lcs_init_module(void) | |
2435 | { | |
2436 | int rc; | |
2437 | ||
c99fc5da | 2438 | pr_info("Loading %s\n", version); |
1da177e4 LT |
2439 | rc = lcs_register_debug_facility(); |
2440 | LCS_DBF_TEXT(0, setup, "lcsinit"); | |
0ca8cc6f UB |
2441 | if (rc) |
2442 | goto out_err; | |
2443 | lcs_root_dev = root_device_register("lcs"); | |
735e849f | 2444 | rc = PTR_RET(lcs_root_dev); |
0ca8cc6f UB |
2445 | if (rc) |
2446 | goto register_err; | |
2447 | rc = ccw_driver_register(&lcs_ccw_driver); | |
2448 | if (rc) | |
2449 | goto ccw_err; | |
9d2aa0aa | 2450 | lcs_group_driver.driver.groups = lcs_drv_attr_groups; |
0ca8cc6f UB |
2451 | rc = ccwgroup_driver_register(&lcs_group_driver); |
2452 | if (rc) | |
2453 | goto ccwgroup_err; | |
1da177e4 | 2454 | return 0; |
0ca8cc6f UB |
2455 | |
2456 | ccwgroup_err: | |
2457 | ccw_driver_unregister(&lcs_ccw_driver); | |
2458 | ccw_err: | |
2459 | root_device_unregister(lcs_root_dev); | |
2460 | register_err: | |
2461 | lcs_unregister_debug_facility(); | |
2462 | out_err: | |
2463 | pr_err("Initializing the lcs device driver failed\n"); | |
2464 | return rc; | |
1da177e4 LT |
2465 | } |
2466 | ||
2467 | ||
2468 | /** | |
2469 | * LCS module cleanup function | |
2470 | */ | |
2471 | static void | |
2472 | __exit lcs_cleanup_module(void) | |
2473 | { | |
c99fc5da | 2474 | pr_info("Terminating lcs module.\n"); |
1da177e4 | 2475 | LCS_DBF_TEXT(0, trace, "cleanup"); |
0ca8cc6f UB |
2476 | ccwgroup_driver_unregister(&lcs_group_driver); |
2477 | ccw_driver_unregister(&lcs_ccw_driver); | |
2478 | root_device_unregister(lcs_root_dev); | |
1da177e4 LT |
2479 | lcs_unregister_debug_facility(); |
2480 | } | |
2481 | ||
2482 | module_init(lcs_init_module); | |
2483 | module_exit(lcs_cleanup_module); | |
2484 | ||
1387780f | 2485 | MODULE_AUTHOR("Frank Pavlic <fpavlic@de.ibm.com>"); |
1da177e4 LT |
2486 | MODULE_LICENSE("GPL"); |
2487 |