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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 | { | |
b646c08e ME |
91 | debug_unregister(lcs_dbf_setup); |
92 | debug_unregister(lcs_dbf_trace); | |
1da177e4 LT |
93 | } |
94 | ||
95 | static int | |
96 | lcs_register_debug_facility(void) | |
97 | { | |
66a464db | 98 | lcs_dbf_setup = debug_register("lcs_setup", 2, 1, 8); |
164b0fb1 | 99 | lcs_dbf_trace = debug_register("lcs_trace", 4, 1, 8); |
1da177e4 | 100 | if (lcs_dbf_setup == NULL || lcs_dbf_trace == NULL) { |
c99fc5da | 101 | pr_err("Not enough memory for debug facility.\n"); |
1da177e4 LT |
102 | lcs_unregister_debug_facility(); |
103 | return -ENOMEM; | |
104 | } | |
105 | debug_register_view(lcs_dbf_setup, &debug_hex_ascii_view); | |
0d613a27 | 106 | debug_set_level(lcs_dbf_setup, 2); |
1da177e4 | 107 | debug_register_view(lcs_dbf_trace, &debug_hex_ascii_view); |
0d613a27 | 108 | debug_set_level(lcs_dbf_trace, 2); |
1da177e4 LT |
109 | return 0; |
110 | } | |
111 | ||
112 | /** | |
113 | * Allocate io buffers. | |
114 | */ | |
115 | static int | |
116 | lcs_alloc_channel(struct lcs_channel *channel) | |
117 | { | |
118 | int cnt; | |
119 | ||
120 | LCS_DBF_TEXT(2, setup, "ichalloc"); | |
121 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
122 | /* alloc memory fo iobuffer */ | |
88abaab4 ES |
123 | channel->iob[cnt].data = |
124 | kzalloc(LCS_IOBUFFERSIZE, GFP_DMA | GFP_KERNEL); | |
1da177e4 LT |
125 | if (channel->iob[cnt].data == NULL) |
126 | break; | |
9163bb2e | 127 | channel->iob[cnt].state = LCS_BUF_STATE_EMPTY; |
1da177e4 LT |
128 | } |
129 | if (cnt < LCS_NUM_BUFFS) { | |
130 | /* Not all io buffers could be allocated. */ | |
131 | LCS_DBF_TEXT(2, setup, "echalloc"); | |
132 | while (cnt-- > 0) | |
133 | kfree(channel->iob[cnt].data); | |
134 | return -ENOMEM; | |
135 | } | |
136 | return 0; | |
137 | } | |
138 | ||
139 | /** | |
140 | * Free io buffers. | |
141 | */ | |
142 | static void | |
143 | lcs_free_channel(struct lcs_channel *channel) | |
144 | { | |
145 | int cnt; | |
146 | ||
147 | LCS_DBF_TEXT(2, setup, "ichfree"); | |
148 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
17fd682e | 149 | kfree(channel->iob[cnt].data); |
1da177e4 LT |
150 | channel->iob[cnt].data = NULL; |
151 | } | |
152 | } | |
153 | ||
154 | /* | |
155 | * Cleanup channel. | |
156 | */ | |
157 | static void | |
158 | lcs_cleanup_channel(struct lcs_channel *channel) | |
159 | { | |
160 | LCS_DBF_TEXT(3, setup, "cleanch"); | |
161 | /* Kill write channel tasklets. */ | |
162 | tasklet_kill(&channel->irq_tasklet); | |
163 | /* Free channel buffers. */ | |
164 | lcs_free_channel(channel); | |
165 | } | |
166 | ||
167 | /** | |
168 | * LCS free memory for card and channels. | |
169 | */ | |
170 | static void | |
171 | lcs_free_card(struct lcs_card *card) | |
172 | { | |
173 | LCS_DBF_TEXT(2, setup, "remcard"); | |
174 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
175 | kfree(card); | |
176 | } | |
177 | ||
178 | /** | |
179 | * LCS alloc memory for card and channels | |
180 | */ | |
181 | static struct lcs_card * | |
182 | lcs_alloc_card(void) | |
183 | { | |
184 | struct lcs_card *card; | |
185 | int rc; | |
186 | ||
187 | LCS_DBF_TEXT(2, setup, "alloclcs"); | |
188 | ||
88abaab4 | 189 | card = kzalloc(sizeof(struct lcs_card), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
190 | if (card == NULL) |
191 | return NULL; | |
1da177e4 LT |
192 | card->lan_type = LCS_FRAME_TYPE_AUTO; |
193 | card->pkt_seq = 0; | |
194 | card->lancmd_timeout = LCS_LANCMD_TIMEOUT_DEFAULT; | |
195 | /* Allocate io buffers for the read channel. */ | |
196 | rc = lcs_alloc_channel(&card->read); | |
197 | if (rc){ | |
198 | LCS_DBF_TEXT(2, setup, "iccwerr"); | |
199 | lcs_free_card(card); | |
200 | return NULL; | |
201 | } | |
202 | /* Allocate io buffers for the write channel. */ | |
203 | rc = lcs_alloc_channel(&card->write); | |
204 | if (rc) { | |
205 | LCS_DBF_TEXT(2, setup, "iccwerr"); | |
206 | lcs_cleanup_channel(&card->read); | |
207 | lcs_free_card(card); | |
208 | return NULL; | |
209 | } | |
210 | ||
211 | #ifdef CONFIG_IP_MULTICAST | |
212 | INIT_LIST_HEAD(&card->ipm_list); | |
213 | #endif | |
214 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
215 | return card; | |
216 | } | |
217 | ||
218 | /* | |
219 | * Setup read channel. | |
220 | */ | |
221 | static void | |
222 | lcs_setup_read_ccws(struct lcs_card *card) | |
223 | { | |
224 | int cnt; | |
225 | ||
226 | LCS_DBF_TEXT(2, setup, "ireadccw"); | |
227 | /* Setup read ccws. */ | |
228 | memset(card->read.ccws, 0, sizeof (struct ccw1) * (LCS_NUM_BUFFS + 1)); | |
229 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
230 | card->read.ccws[cnt].cmd_code = LCS_CCW_READ; | |
231 | card->read.ccws[cnt].count = LCS_IOBUFFERSIZE; | |
232 | card->read.ccws[cnt].flags = | |
233 | CCW_FLAG_CC | CCW_FLAG_SLI | CCW_FLAG_PCI; | |
234 | /* | |
235 | * Note: we have allocated the buffer with GFP_DMA, so | |
236 | * we do not need to do set_normalized_cda. | |
237 | */ | |
238 | card->read.ccws[cnt].cda = | |
239 | (__u32) __pa(card->read.iob[cnt].data); | |
240 | ((struct lcs_header *) | |
241 | card->read.iob[cnt].data)->offset = LCS_ILLEGAL_OFFSET; | |
242 | card->read.iob[cnt].callback = lcs_get_frames_cb; | |
9163bb2e | 243 | card->read.iob[cnt].state = LCS_BUF_STATE_READY; |
1da177e4 LT |
244 | card->read.iob[cnt].count = LCS_IOBUFFERSIZE; |
245 | } | |
246 | card->read.ccws[0].flags &= ~CCW_FLAG_PCI; | |
247 | card->read.ccws[LCS_NUM_BUFFS - 1].flags &= ~CCW_FLAG_PCI; | |
248 | card->read.ccws[LCS_NUM_BUFFS - 1].flags |= CCW_FLAG_SUSPEND; | |
249 | /* Last ccw is a tic (transfer in channel). */ | |
250 | card->read.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER; | |
251 | card->read.ccws[LCS_NUM_BUFFS].cda = | |
252 | (__u32) __pa(card->read.ccws); | |
253 | /* Setg initial state of the read channel. */ | |
9163bb2e | 254 | card->read.state = LCS_CH_STATE_INIT; |
1da177e4 LT |
255 | |
256 | card->read.io_idx = 0; | |
257 | card->read.buf_idx = 0; | |
258 | } | |
259 | ||
260 | static void | |
261 | lcs_setup_read(struct lcs_card *card) | |
262 | { | |
263 | LCS_DBF_TEXT(3, setup, "initread"); | |
264 | ||
265 | lcs_setup_read_ccws(card); | |
266 | /* Initialize read channel tasklet. */ | |
267 | card->read.irq_tasklet.data = (unsigned long) &card->read; | |
268 | card->read.irq_tasklet.func = lcs_tasklet; | |
269 | /* Initialize waitqueue. */ | |
270 | init_waitqueue_head(&card->read.wait_q); | |
271 | } | |
272 | ||
273 | /* | |
274 | * Setup write channel. | |
275 | */ | |
276 | static void | |
277 | lcs_setup_write_ccws(struct lcs_card *card) | |
278 | { | |
279 | int cnt; | |
280 | ||
281 | LCS_DBF_TEXT(3, setup, "iwritccw"); | |
282 | /* Setup write ccws. */ | |
3c787475 | 283 | memset(card->write.ccws, 0, sizeof(struct ccw1) * (LCS_NUM_BUFFS + 1)); |
1da177e4 LT |
284 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { |
285 | card->write.ccws[cnt].cmd_code = LCS_CCW_WRITE; | |
286 | card->write.ccws[cnt].count = 0; | |
287 | card->write.ccws[cnt].flags = | |
288 | CCW_FLAG_SUSPEND | CCW_FLAG_CC | CCW_FLAG_SLI; | |
289 | /* | |
290 | * Note: we have allocated the buffer with GFP_DMA, so | |
291 | * we do not need to do set_normalized_cda. | |
292 | */ | |
293 | card->write.ccws[cnt].cda = | |
294 | (__u32) __pa(card->write.iob[cnt].data); | |
295 | } | |
296 | /* Last ccw is a tic (transfer in channel). */ | |
297 | card->write.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER; | |
298 | card->write.ccws[LCS_NUM_BUFFS].cda = | |
299 | (__u32) __pa(card->write.ccws); | |
300 | /* Set initial state of the write channel. */ | |
9163bb2e | 301 | card->read.state = LCS_CH_STATE_INIT; |
1da177e4 LT |
302 | |
303 | card->write.io_idx = 0; | |
304 | card->write.buf_idx = 0; | |
305 | } | |
306 | ||
307 | static void | |
308 | lcs_setup_write(struct lcs_card *card) | |
309 | { | |
310 | LCS_DBF_TEXT(3, setup, "initwrit"); | |
311 | ||
312 | lcs_setup_write_ccws(card); | |
313 | /* Initialize write channel tasklet. */ | |
314 | card->write.irq_tasklet.data = (unsigned long) &card->write; | |
315 | card->write.irq_tasklet.func = lcs_tasklet; | |
316 | /* Initialize waitqueue. */ | |
317 | init_waitqueue_head(&card->write.wait_q); | |
318 | } | |
319 | ||
320 | static void | |
321 | lcs_set_allowed_threads(struct lcs_card *card, unsigned long threads) | |
322 | { | |
323 | unsigned long flags; | |
324 | ||
325 | spin_lock_irqsave(&card->mask_lock, flags); | |
326 | card->thread_allowed_mask = threads; | |
327 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
328 | wake_up(&card->wait_q); | |
329 | } | |
330 | static inline int | |
331 | lcs_threads_running(struct lcs_card *card, unsigned long threads) | |
332 | { | |
333 | unsigned long flags; | |
334 | int rc = 0; | |
335 | ||
336 | spin_lock_irqsave(&card->mask_lock, flags); | |
337 | rc = (card->thread_running_mask & threads); | |
338 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
339 | return rc; | |
340 | } | |
341 | ||
342 | static int | |
343 | lcs_wait_for_threads(struct lcs_card *card, unsigned long threads) | |
344 | { | |
345 | return wait_event_interruptible(card->wait_q, | |
346 | lcs_threads_running(card, threads) == 0); | |
347 | } | |
348 | ||
349 | static inline int | |
350 | lcs_set_thread_start_bit(struct lcs_card *card, unsigned long thread) | |
351 | { | |
352 | unsigned long flags; | |
353 | ||
354 | spin_lock_irqsave(&card->mask_lock, flags); | |
355 | if ( !(card->thread_allowed_mask & thread) || | |
356 | (card->thread_start_mask & thread) ) { | |
357 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
358 | return -EPERM; | |
359 | } | |
360 | card->thread_start_mask |= thread; | |
361 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
362 | return 0; | |
363 | } | |
364 | ||
365 | static void | |
366 | lcs_clear_thread_running_bit(struct lcs_card *card, unsigned long thread) | |
367 | { | |
368 | unsigned long flags; | |
369 | ||
370 | spin_lock_irqsave(&card->mask_lock, flags); | |
371 | card->thread_running_mask &= ~thread; | |
372 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
373 | wake_up(&card->wait_q); | |
374 | } | |
375 | ||
376 | static inline int | |
377 | __lcs_do_run_thread(struct lcs_card *card, unsigned long thread) | |
378 | { | |
379 | unsigned long flags; | |
380 | int rc = 0; | |
381 | ||
382 | spin_lock_irqsave(&card->mask_lock, flags); | |
383 | if (card->thread_start_mask & thread){ | |
384 | if ((card->thread_allowed_mask & thread) && | |
385 | !(card->thread_running_mask & thread)){ | |
386 | rc = 1; | |
387 | card->thread_start_mask &= ~thread; | |
388 | card->thread_running_mask |= thread; | |
389 | } else | |
390 | rc = -EPERM; | |
391 | } | |
392 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
393 | return rc; | |
394 | } | |
395 | ||
396 | static int | |
397 | lcs_do_run_thread(struct lcs_card *card, unsigned long thread) | |
398 | { | |
399 | int rc = 0; | |
400 | wait_event(card->wait_q, | |
401 | (rc = __lcs_do_run_thread(card, thread)) >= 0); | |
402 | return rc; | |
403 | } | |
404 | ||
405 | static int | |
406 | lcs_do_start_thread(struct lcs_card *card, unsigned long thread) | |
407 | { | |
408 | unsigned long flags; | |
409 | int rc = 0; | |
410 | ||
411 | spin_lock_irqsave(&card->mask_lock, flags); | |
412 | LCS_DBF_TEXT_(4, trace, " %02x%02x%02x", | |
413 | (u8) card->thread_start_mask, | |
414 | (u8) card->thread_allowed_mask, | |
415 | (u8) card->thread_running_mask); | |
416 | rc = (card->thread_start_mask & thread); | |
417 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
418 | return rc; | |
419 | } | |
420 | ||
421 | /** | |
422 | * Initialize channels,card and state machines. | |
423 | */ | |
424 | static void | |
425 | lcs_setup_card(struct lcs_card *card) | |
426 | { | |
427 | LCS_DBF_TEXT(2, setup, "initcard"); | |
428 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
429 | ||
430 | lcs_setup_read(card); | |
431 | lcs_setup_write(card); | |
432 | /* Set cards initial state. */ | |
433 | card->state = DEV_STATE_DOWN; | |
434 | card->tx_buffer = NULL; | |
435 | card->tx_emitted = 0; | |
436 | ||
1da177e4 LT |
437 | init_waitqueue_head(&card->wait_q); |
438 | spin_lock_init(&card->lock); | |
439 | spin_lock_init(&card->ipm_lock); | |
440 | spin_lock_init(&card->mask_lock); | |
441 | #ifdef CONFIG_IP_MULTICAST | |
442 | INIT_LIST_HEAD(&card->ipm_list); | |
443 | #endif | |
444 | INIT_LIST_HEAD(&card->lancmd_waiters); | |
445 | } | |
446 | ||
447 | static inline void | |
448 | lcs_clear_multicast_list(struct lcs_card *card) | |
449 | { | |
450 | #ifdef CONFIG_IP_MULTICAST | |
451 | struct lcs_ipm_list *ipm; | |
452 | unsigned long flags; | |
453 | ||
454 | /* Free multicast list. */ | |
455 | LCS_DBF_TEXT(3, setup, "clmclist"); | |
456 | spin_lock_irqsave(&card->ipm_lock, flags); | |
457 | while (!list_empty(&card->ipm_list)){ | |
458 | ipm = list_entry(card->ipm_list.next, | |
459 | struct lcs_ipm_list, list); | |
460 | list_del(&ipm->list); | |
461 | if (ipm->ipm_state != LCS_IPM_STATE_SET_REQUIRED){ | |
462 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
463 | lcs_send_delipm(card, ipm); | |
464 | spin_lock_irqsave(&card->ipm_lock, flags); | |
465 | } | |
466 | kfree(ipm); | |
467 | } | |
468 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
469 | #endif | |
470 | } | |
471 | /** | |
472 | * Cleanup channels,card and state machines. | |
473 | */ | |
474 | static void | |
475 | lcs_cleanup_card(struct lcs_card *card) | |
476 | { | |
477 | ||
478 | LCS_DBF_TEXT(3, setup, "cleancrd"); | |
479 | LCS_DBF_HEX(2,setup,&card,sizeof(void*)); | |
480 | ||
481 | if (card->dev != NULL) | |
482 | free_netdev(card->dev); | |
483 | /* Cleanup channels. */ | |
484 | lcs_cleanup_channel(&card->write); | |
485 | lcs_cleanup_channel(&card->read); | |
486 | } | |
487 | ||
488 | /** | |
489 | * Start channel. | |
490 | */ | |
491 | static int | |
492 | lcs_start_channel(struct lcs_channel *channel) | |
493 | { | |
494 | unsigned long flags; | |
495 | int rc; | |
496 | ||
2a0217d5 | 497 | LCS_DBF_TEXT_(4, trace,"ssch%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
498 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
499 | rc = ccw_device_start(channel->ccwdev, | |
500 | channel->ccws + channel->io_idx, 0, 0, | |
501 | DOIO_DENY_PREFETCH | DOIO_ALLOW_SUSPEND); | |
502 | if (rc == 0) | |
9163bb2e | 503 | channel->state = LCS_CH_STATE_RUNNING; |
1da177e4 LT |
504 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); |
505 | if (rc) { | |
2a0217d5 KS |
506 | LCS_DBF_TEXT_(4,trace,"essh%s", |
507 | dev_name(&channel->ccwdev->dev)); | |
c99fc5da KW |
508 | dev_err(&channel->ccwdev->dev, |
509 | "Starting an LCS device resulted in an error," | |
510 | " rc=%d!\n", rc); | |
1da177e4 LT |
511 | } |
512 | return rc; | |
513 | } | |
514 | ||
515 | static int | |
516 | lcs_clear_channel(struct lcs_channel *channel) | |
517 | { | |
518 | unsigned long flags; | |
519 | int rc; | |
520 | ||
521 | LCS_DBF_TEXT(4,trace,"clearch"); | |
2a0217d5 | 522 | LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
523 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
524 | rc = ccw_device_clear(channel->ccwdev, (addr_t) channel); | |
525 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
526 | if (rc) { | |
2a0217d5 KS |
527 | LCS_DBF_TEXT_(4, trace, "ecsc%s", |
528 | dev_name(&channel->ccwdev->dev)); | |
1da177e4 LT |
529 | return rc; |
530 | } | |
9163bb2e UB |
531 | wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_CLEARED)); |
532 | channel->state = LCS_CH_STATE_STOPPED; | |
1da177e4 LT |
533 | return rc; |
534 | } | |
535 | ||
536 | ||
537 | /** | |
538 | * Stop channel. | |
539 | */ | |
540 | static int | |
541 | lcs_stop_channel(struct lcs_channel *channel) | |
542 | { | |
543 | unsigned long flags; | |
544 | int rc; | |
545 | ||
9163bb2e | 546 | if (channel->state == LCS_CH_STATE_STOPPED) |
1da177e4 LT |
547 | return 0; |
548 | LCS_DBF_TEXT(4,trace,"haltsch"); | |
2a0217d5 | 549 | LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev)); |
9163bb2e | 550 | channel->state = LCS_CH_STATE_INIT; |
1da177e4 LT |
551 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
552 | rc = ccw_device_halt(channel->ccwdev, (addr_t) channel); | |
553 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
554 | if (rc) { | |
2a0217d5 KS |
555 | LCS_DBF_TEXT_(4, trace, "ehsc%s", |
556 | dev_name(&channel->ccwdev->dev)); | |
1da177e4 LT |
557 | return rc; |
558 | } | |
559 | /* Asynchronous halt initialted. Wait for its completion. */ | |
9163bb2e | 560 | wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_HALTED)); |
1da177e4 LT |
561 | lcs_clear_channel(channel); |
562 | return 0; | |
563 | } | |
564 | ||
565 | /** | |
566 | * start read and write channel | |
567 | */ | |
568 | static int | |
569 | lcs_start_channels(struct lcs_card *card) | |
570 | { | |
571 | int rc; | |
572 | ||
573 | LCS_DBF_TEXT(2, trace, "chstart"); | |
574 | /* start read channel */ | |
575 | rc = lcs_start_channel(&card->read); | |
576 | if (rc) | |
577 | return rc; | |
578 | /* start write channel */ | |
579 | rc = lcs_start_channel(&card->write); | |
580 | if (rc) | |
581 | lcs_stop_channel(&card->read); | |
582 | return rc; | |
583 | } | |
584 | ||
585 | /** | |
586 | * stop read and write channel | |
587 | */ | |
588 | static int | |
589 | lcs_stop_channels(struct lcs_card *card) | |
590 | { | |
591 | LCS_DBF_TEXT(2, trace, "chhalt"); | |
592 | lcs_stop_channel(&card->read); | |
593 | lcs_stop_channel(&card->write); | |
594 | return 0; | |
595 | } | |
596 | ||
597 | /** | |
598 | * Get empty buffer. | |
599 | */ | |
600 | static struct lcs_buffer * | |
601 | __lcs_get_buffer(struct lcs_channel *channel) | |
602 | { | |
603 | int index; | |
604 | ||
605 | LCS_DBF_TEXT(5, trace, "_getbuff"); | |
606 | index = channel->io_idx; | |
607 | do { | |
9163bb2e UB |
608 | if (channel->iob[index].state == LCS_BUF_STATE_EMPTY) { |
609 | channel->iob[index].state = LCS_BUF_STATE_LOCKED; | |
1da177e4 LT |
610 | return channel->iob + index; |
611 | } | |
612 | index = (index + 1) & (LCS_NUM_BUFFS - 1); | |
613 | } while (index != channel->io_idx); | |
614 | return NULL; | |
615 | } | |
616 | ||
617 | static struct lcs_buffer * | |
618 | lcs_get_buffer(struct lcs_channel *channel) | |
619 | { | |
620 | struct lcs_buffer *buffer; | |
621 | unsigned long flags; | |
622 | ||
623 | LCS_DBF_TEXT(5, trace, "getbuff"); | |
624 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); | |
625 | buffer = __lcs_get_buffer(channel); | |
626 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
627 | return buffer; | |
628 | } | |
629 | ||
630 | /** | |
631 | * Resume channel program if the channel is suspended. | |
632 | */ | |
633 | static int | |
634 | __lcs_resume_channel(struct lcs_channel *channel) | |
635 | { | |
636 | int rc; | |
637 | ||
9163bb2e | 638 | if (channel->state != LCS_CH_STATE_SUSPENDED) |
1da177e4 LT |
639 | return 0; |
640 | if (channel->ccws[channel->io_idx].flags & CCW_FLAG_SUSPEND) | |
641 | return 0; | |
2a0217d5 | 642 | LCS_DBF_TEXT_(5, trace, "rsch%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
643 | rc = ccw_device_resume(channel->ccwdev); |
644 | if (rc) { | |
2a0217d5 KS |
645 | LCS_DBF_TEXT_(4, trace, "ersc%s", |
646 | dev_name(&channel->ccwdev->dev)); | |
c99fc5da KW |
647 | dev_err(&channel->ccwdev->dev, |
648 | "Sending data from the LCS device to the LAN failed" | |
649 | " with rc=%d\n",rc); | |
1da177e4 | 650 | } else |
9163bb2e | 651 | channel->state = LCS_CH_STATE_RUNNING; |
1da177e4 LT |
652 | return rc; |
653 | ||
654 | } | |
655 | ||
656 | /** | |
657 | * Make a buffer ready for processing. | |
658 | */ | |
659 | static inline void | |
660 | __lcs_ready_buffer_bits(struct lcs_channel *channel, int index) | |
661 | { | |
662 | int prev, next; | |
663 | ||
664 | LCS_DBF_TEXT(5, trace, "rdybits"); | |
665 | prev = (index - 1) & (LCS_NUM_BUFFS - 1); | |
666 | next = (index + 1) & (LCS_NUM_BUFFS - 1); | |
667 | /* Check if we may clear the suspend bit of this buffer. */ | |
668 | if (channel->ccws[next].flags & CCW_FLAG_SUSPEND) { | |
669 | /* Check if we have to set the PCI bit. */ | |
670 | if (!(channel->ccws[prev].flags & CCW_FLAG_SUSPEND)) | |
671 | /* Suspend bit of the previous buffer is not set. */ | |
672 | channel->ccws[index].flags |= CCW_FLAG_PCI; | |
673 | /* Suspend bit of the next buffer is set. */ | |
674 | channel->ccws[index].flags &= ~CCW_FLAG_SUSPEND; | |
675 | } | |
676 | } | |
677 | ||
678 | static int | |
679 | lcs_ready_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
680 | { | |
681 | unsigned long flags; | |
682 | int index, rc; | |
683 | ||
684 | LCS_DBF_TEXT(5, trace, "rdybuff"); | |
9163bb2e UB |
685 | BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED && |
686 | buffer->state != LCS_BUF_STATE_PROCESSED); | |
1da177e4 | 687 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
9163bb2e | 688 | buffer->state = LCS_BUF_STATE_READY; |
1da177e4 LT |
689 | index = buffer - channel->iob; |
690 | /* Set length. */ | |
691 | channel->ccws[index].count = buffer->count; | |
692 | /* Check relevant PCI/suspend bits. */ | |
693 | __lcs_ready_buffer_bits(channel, index); | |
694 | rc = __lcs_resume_channel(channel); | |
695 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
696 | return rc; | |
697 | } | |
698 | ||
699 | /** | |
700 | * Mark the buffer as processed. Take care of the suspend bit | |
701 | * of the previous buffer. This function is called from | |
702 | * interrupt context, so the lock must not be taken. | |
703 | */ | |
704 | static int | |
705 | __lcs_processed_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
706 | { | |
707 | int index, prev, next; | |
708 | ||
709 | LCS_DBF_TEXT(5, trace, "prcsbuff"); | |
9163bb2e UB |
710 | BUG_ON(buffer->state != LCS_BUF_STATE_READY); |
711 | buffer->state = LCS_BUF_STATE_PROCESSED; | |
1da177e4 LT |
712 | index = buffer - channel->iob; |
713 | prev = (index - 1) & (LCS_NUM_BUFFS - 1); | |
714 | next = (index + 1) & (LCS_NUM_BUFFS - 1); | |
715 | /* Set the suspend bit and clear the PCI bit of this buffer. */ | |
716 | channel->ccws[index].flags |= CCW_FLAG_SUSPEND; | |
717 | channel->ccws[index].flags &= ~CCW_FLAG_PCI; | |
718 | /* Check the suspend bit of the previous buffer. */ | |
9163bb2e | 719 | if (channel->iob[prev].state == LCS_BUF_STATE_READY) { |
1da177e4 LT |
720 | /* |
721 | * Previous buffer is in state ready. It might have | |
722 | * happened in lcs_ready_buffer that the suspend bit | |
723 | * has not been cleared to avoid an endless loop. | |
724 | * Do it now. | |
725 | */ | |
726 | __lcs_ready_buffer_bits(channel, prev); | |
727 | } | |
728 | /* Clear PCI bit of next buffer. */ | |
729 | channel->ccws[next].flags &= ~CCW_FLAG_PCI; | |
730 | return __lcs_resume_channel(channel); | |
731 | } | |
732 | ||
733 | /** | |
734 | * Put a processed buffer back to state empty. | |
735 | */ | |
736 | static void | |
737 | lcs_release_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
738 | { | |
739 | unsigned long flags; | |
740 | ||
741 | LCS_DBF_TEXT(5, trace, "relbuff"); | |
9163bb2e UB |
742 | BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED && |
743 | buffer->state != LCS_BUF_STATE_PROCESSED); | |
1da177e4 | 744 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
9163bb2e | 745 | buffer->state = LCS_BUF_STATE_EMPTY; |
1da177e4 LT |
746 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); |
747 | } | |
748 | ||
749 | /** | |
750 | * Get buffer for a lan command. | |
751 | */ | |
752 | static struct lcs_buffer * | |
753 | lcs_get_lancmd(struct lcs_card *card, int count) | |
754 | { | |
755 | struct lcs_buffer *buffer; | |
756 | struct lcs_cmd *cmd; | |
757 | ||
758 | LCS_DBF_TEXT(4, trace, "getlncmd"); | |
759 | /* Get buffer and wait if none is available. */ | |
760 | wait_event(card->write.wait_q, | |
761 | ((buffer = lcs_get_buffer(&card->write)) != NULL)); | |
762 | count += sizeof(struct lcs_header); | |
763 | *(__u16 *)(buffer->data + count) = 0; | |
764 | buffer->count = count + sizeof(__u16); | |
765 | buffer->callback = lcs_release_buffer; | |
766 | cmd = (struct lcs_cmd *) buffer->data; | |
767 | cmd->offset = count; | |
768 | cmd->type = LCS_FRAME_TYPE_CONTROL; | |
769 | cmd->slot = 0; | |
770 | return buffer; | |
771 | } | |
772 | ||
773 | ||
774 | static void | |
775 | lcs_get_reply(struct lcs_reply *reply) | |
776 | { | |
777 | WARN_ON(atomic_read(&reply->refcnt) <= 0); | |
778 | atomic_inc(&reply->refcnt); | |
779 | } | |
780 | ||
781 | static void | |
782 | lcs_put_reply(struct lcs_reply *reply) | |
783 | { | |
784 | WARN_ON(atomic_read(&reply->refcnt) <= 0); | |
785 | if (atomic_dec_and_test(&reply->refcnt)) { | |
786 | kfree(reply); | |
787 | } | |
788 | ||
789 | } | |
790 | ||
791 | static struct lcs_reply * | |
792 | lcs_alloc_reply(struct lcs_cmd *cmd) | |
793 | { | |
794 | struct lcs_reply *reply; | |
795 | ||
796 | LCS_DBF_TEXT(4, trace, "getreply"); | |
797 | ||
88abaab4 | 798 | reply = kzalloc(sizeof(struct lcs_reply), GFP_ATOMIC); |
1da177e4 LT |
799 | if (!reply) |
800 | return NULL; | |
1da177e4 LT |
801 | atomic_set(&reply->refcnt,1); |
802 | reply->sequence_no = cmd->sequence_no; | |
803 | reply->received = 0; | |
804 | reply->rc = 0; | |
805 | init_waitqueue_head(&reply->wait_q); | |
806 | ||
807 | return reply; | |
808 | } | |
809 | ||
810 | /** | |
811 | * Notifier function for lancmd replies. Called from read irq. | |
812 | */ | |
813 | static void | |
814 | lcs_notify_lancmd_waiters(struct lcs_card *card, struct lcs_cmd *cmd) | |
815 | { | |
816 | struct list_head *l, *n; | |
817 | struct lcs_reply *reply; | |
818 | ||
819 | LCS_DBF_TEXT(4, trace, "notiwait"); | |
820 | spin_lock(&card->lock); | |
821 | list_for_each_safe(l, n, &card->lancmd_waiters) { | |
822 | reply = list_entry(l, struct lcs_reply, list); | |
823 | if (reply->sequence_no == cmd->sequence_no) { | |
824 | lcs_get_reply(reply); | |
825 | list_del_init(&reply->list); | |
826 | if (reply->callback != NULL) | |
827 | reply->callback(card, cmd); | |
828 | reply->received = 1; | |
829 | reply->rc = cmd->return_code; | |
830 | wake_up(&reply->wait_q); | |
831 | lcs_put_reply(reply); | |
832 | break; | |
833 | } | |
834 | } | |
835 | spin_unlock(&card->lock); | |
836 | } | |
837 | ||
838 | /** | |
b595076a | 839 | * Emit buffer of a lan command. |
1da177e4 | 840 | */ |
2b67fc46 | 841 | static void |
1da177e4 LT |
842 | lcs_lancmd_timeout(unsigned long data) |
843 | { | |
844 | struct lcs_reply *reply, *list_reply, *r; | |
845 | unsigned long flags; | |
846 | ||
847 | LCS_DBF_TEXT(4, trace, "timeout"); | |
848 | reply = (struct lcs_reply *) data; | |
849 | spin_lock_irqsave(&reply->card->lock, flags); | |
850 | list_for_each_entry_safe(list_reply, r, | |
851 | &reply->card->lancmd_waiters,list) { | |
852 | if (reply == list_reply) { | |
853 | lcs_get_reply(reply); | |
854 | list_del_init(&reply->list); | |
855 | spin_unlock_irqrestore(&reply->card->lock, flags); | |
856 | reply->received = 1; | |
857 | reply->rc = -ETIME; | |
858 | wake_up(&reply->wait_q); | |
859 | lcs_put_reply(reply); | |
860 | return; | |
861 | } | |
862 | } | |
863 | spin_unlock_irqrestore(&reply->card->lock, flags); | |
864 | } | |
865 | ||
866 | static int | |
867 | lcs_send_lancmd(struct lcs_card *card, struct lcs_buffer *buffer, | |
868 | void (*reply_callback)(struct lcs_card *, struct lcs_cmd *)) | |
869 | { | |
870 | struct lcs_reply *reply; | |
871 | struct lcs_cmd *cmd; | |
872 | struct timer_list timer; | |
873 | unsigned long flags; | |
874 | int rc; | |
875 | ||
876 | LCS_DBF_TEXT(4, trace, "sendcmd"); | |
877 | cmd = (struct lcs_cmd *) buffer->data; | |
878 | cmd->return_code = 0; | |
879 | cmd->sequence_no = card->sequence_no++; | |
880 | reply = lcs_alloc_reply(cmd); | |
881 | if (!reply) | |
882 | return -ENOMEM; | |
883 | reply->callback = reply_callback; | |
884 | reply->card = card; | |
885 | spin_lock_irqsave(&card->lock, flags); | |
886 | list_add_tail(&reply->list, &card->lancmd_waiters); | |
887 | spin_unlock_irqrestore(&card->lock, flags); | |
888 | ||
889 | buffer->callback = lcs_release_buffer; | |
890 | rc = lcs_ready_buffer(&card->write, buffer); | |
891 | if (rc) | |
892 | return rc; | |
d62e09e3 | 893 | init_timer_on_stack(&timer); |
1da177e4 LT |
894 | timer.function = lcs_lancmd_timeout; |
895 | timer.data = (unsigned long) reply; | |
896 | timer.expires = jiffies + HZ*card->lancmd_timeout; | |
897 | add_timer(&timer); | |
898 | wait_event(reply->wait_q, reply->received); | |
899 | del_timer_sync(&timer); | |
12797e8e | 900 | destroy_timer_on_stack(&timer); |
1da177e4 LT |
901 | LCS_DBF_TEXT_(4, trace, "rc:%d",reply->rc); |
902 | rc = reply->rc; | |
903 | lcs_put_reply(reply); | |
904 | return rc ? -EIO : 0; | |
905 | } | |
906 | ||
907 | /** | |
908 | * LCS startup command | |
909 | */ | |
910 | static int | |
911 | lcs_send_startup(struct lcs_card *card, __u8 initiator) | |
912 | { | |
913 | struct lcs_buffer *buffer; | |
914 | struct lcs_cmd *cmd; | |
915 | ||
916 | LCS_DBF_TEXT(2, trace, "startup"); | |
917 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
918 | cmd = (struct lcs_cmd *) buffer->data; | |
919 | cmd->cmd_code = LCS_CMD_STARTUP; | |
920 | cmd->initiator = initiator; | |
921 | cmd->cmd.lcs_startup.buff_size = LCS_IOBUFFERSIZE; | |
922 | return lcs_send_lancmd(card, buffer, NULL); | |
923 | } | |
924 | ||
925 | /** | |
926 | * LCS shutdown command | |
927 | */ | |
928 | static int | |
929 | lcs_send_shutdown(struct lcs_card *card) | |
930 | { | |
931 | struct lcs_buffer *buffer; | |
932 | struct lcs_cmd *cmd; | |
933 | ||
934 | LCS_DBF_TEXT(2, trace, "shutdown"); | |
935 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
936 | cmd = (struct lcs_cmd *) buffer->data; | |
937 | cmd->cmd_code = LCS_CMD_SHUTDOWN; | |
938 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
939 | return lcs_send_lancmd(card, buffer, NULL); | |
940 | } | |
941 | ||
942 | /** | |
943 | * LCS lanstat command | |
944 | */ | |
945 | static void | |
946 | __lcs_lanstat_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
947 | { | |
948 | LCS_DBF_TEXT(2, trace, "statcb"); | |
949 | memcpy(card->mac, cmd->cmd.lcs_lanstat_cmd.mac_addr, LCS_MAC_LENGTH); | |
950 | } | |
951 | ||
952 | static int | |
953 | lcs_send_lanstat(struct lcs_card *card) | |
954 | { | |
955 | struct lcs_buffer *buffer; | |
956 | struct lcs_cmd *cmd; | |
957 | ||
958 | LCS_DBF_TEXT(2,trace, "cmdstat"); | |
959 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
960 | cmd = (struct lcs_cmd *) buffer->data; | |
961 | /* Setup lanstat command. */ | |
962 | cmd->cmd_code = LCS_CMD_LANSTAT; | |
963 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
964 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
965 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
966 | return lcs_send_lancmd(card, buffer, __lcs_lanstat_cb); | |
967 | } | |
968 | ||
969 | /** | |
970 | * send stoplan command | |
971 | */ | |
972 | static int | |
973 | lcs_send_stoplan(struct lcs_card *card, __u8 initiator) | |
974 | { | |
975 | struct lcs_buffer *buffer; | |
976 | struct lcs_cmd *cmd; | |
977 | ||
978 | LCS_DBF_TEXT(2, trace, "cmdstpln"); | |
979 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
980 | cmd = (struct lcs_cmd *) buffer->data; | |
981 | cmd->cmd_code = LCS_CMD_STOPLAN; | |
982 | cmd->initiator = initiator; | |
983 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
984 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
985 | return lcs_send_lancmd(card, buffer, NULL); | |
986 | } | |
987 | ||
988 | /** | |
989 | * send startlan command | |
990 | */ | |
991 | static void | |
992 | __lcs_send_startlan_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
993 | { | |
994 | LCS_DBF_TEXT(2, trace, "srtlancb"); | |
995 | card->lan_type = cmd->cmd.lcs_std_cmd.lan_type; | |
996 | card->portno = cmd->cmd.lcs_std_cmd.portno; | |
997 | } | |
998 | ||
999 | static int | |
1000 | lcs_send_startlan(struct lcs_card *card, __u8 initiator) | |
1001 | { | |
1002 | struct lcs_buffer *buffer; | |
1003 | struct lcs_cmd *cmd; | |
1004 | ||
1005 | LCS_DBF_TEXT(2, trace, "cmdstaln"); | |
1006 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
1007 | cmd = (struct lcs_cmd *) buffer->data; | |
1008 | cmd->cmd_code = LCS_CMD_STARTLAN; | |
1009 | cmd->initiator = initiator; | |
1010 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
1011 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
1012 | return lcs_send_lancmd(card, buffer, __lcs_send_startlan_cb); | |
1013 | } | |
1014 | ||
1015 | #ifdef CONFIG_IP_MULTICAST | |
1016 | /** | |
1017 | * send setipm command (Multicast) | |
1018 | */ | |
1019 | static int | |
1020 | lcs_send_setipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list) | |
1021 | { | |
1022 | struct lcs_buffer *buffer; | |
1023 | struct lcs_cmd *cmd; | |
1024 | ||
1025 | LCS_DBF_TEXT(2, trace, "cmdsetim"); | |
1026 | buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE); | |
1027 | cmd = (struct lcs_cmd *) buffer->data; | |
1028 | cmd->cmd_code = LCS_CMD_SETIPM; | |
1029 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1030 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1031 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1032 | cmd->cmd.lcs_qipassist.version = 4; | |
1033 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1034 | memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair, | |
1035 | &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair)); | |
1036 | LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr); | |
1037 | return lcs_send_lancmd(card, buffer, NULL); | |
1038 | } | |
1039 | ||
1040 | /** | |
1041 | * send delipm command (Multicast) | |
1042 | */ | |
1043 | static int | |
1044 | lcs_send_delipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list) | |
1045 | { | |
1046 | struct lcs_buffer *buffer; | |
1047 | struct lcs_cmd *cmd; | |
1048 | ||
1049 | LCS_DBF_TEXT(2, trace, "cmddelim"); | |
1050 | buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE); | |
1051 | cmd = (struct lcs_cmd *) buffer->data; | |
1052 | cmd->cmd_code = LCS_CMD_DELIPM; | |
1053 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1054 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1055 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1056 | cmd->cmd.lcs_qipassist.version = 4; | |
1057 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1058 | memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair, | |
1059 | &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair)); | |
1060 | LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr); | |
1061 | return lcs_send_lancmd(card, buffer, NULL); | |
1062 | } | |
1063 | ||
1064 | /** | |
1065 | * check if multicast is supported by LCS | |
1066 | */ | |
1067 | static void | |
1068 | __lcs_check_multicast_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
1069 | { | |
1070 | LCS_DBF_TEXT(2, trace, "chkmccb"); | |
1071 | card->ip_assists_supported = | |
1072 | cmd->cmd.lcs_qipassist.ip_assists_supported; | |
1073 | card->ip_assists_enabled = | |
1074 | cmd->cmd.lcs_qipassist.ip_assists_enabled; | |
1075 | } | |
1076 | ||
1077 | static int | |
1078 | lcs_check_multicast_support(struct lcs_card *card) | |
1079 | { | |
1080 | struct lcs_buffer *buffer; | |
1081 | struct lcs_cmd *cmd; | |
1082 | int rc; | |
1083 | ||
1084 | LCS_DBF_TEXT(2, trace, "cmdqipa"); | |
1085 | /* Send query ipassist. */ | |
1086 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
1087 | cmd = (struct lcs_cmd *) buffer->data; | |
1088 | cmd->cmd_code = LCS_CMD_QIPASSIST; | |
1089 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1090 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1091 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1092 | cmd->cmd.lcs_qipassist.version = 4; | |
1093 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1094 | rc = lcs_send_lancmd(card, buffer, __lcs_check_multicast_cb); | |
1095 | if (rc != 0) { | |
c99fc5da | 1096 | pr_err("Query IPAssist failed. Assuming unsupported!\n"); |
1da177e4 LT |
1097 | return -EOPNOTSUPP; |
1098 | } | |
1da177e4 LT |
1099 | if (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) |
1100 | return 0; | |
1101 | return -EOPNOTSUPP; | |
1102 | } | |
1103 | ||
1104 | /** | |
1105 | * set or del multicast address on LCS card | |
1106 | */ | |
1107 | static void | |
1108 | lcs_fix_multicast_list(struct lcs_card *card) | |
1109 | { | |
1110 | struct list_head failed_list; | |
1111 | struct lcs_ipm_list *ipm, *tmp; | |
1112 | unsigned long flags; | |
1113 | int rc; | |
1114 | ||
1115 | LCS_DBF_TEXT(4,trace, "fixipm"); | |
1116 | INIT_LIST_HEAD(&failed_list); | |
1117 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1118 | list_modified: | |
1119 | list_for_each_entry_safe(ipm, tmp, &card->ipm_list, list){ | |
1120 | switch (ipm->ipm_state) { | |
1121 | case LCS_IPM_STATE_SET_REQUIRED: | |
25985edc | 1122 | /* del from ipm_list so no one else can tamper with |
1da177e4 LT |
1123 | * this entry */ |
1124 | list_del_init(&ipm->list); | |
1125 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1126 | rc = lcs_send_setipm(card, ipm); | |
1127 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1128 | if (rc) { | |
c99fc5da KW |
1129 | pr_info("Adding multicast address failed." |
1130 | " Table possibly full!\n"); | |
1da177e4 LT |
1131 | /* store ipm in failed list -> will be added |
1132 | * to ipm_list again, so a retry will be done | |
1133 | * during the next call of this function */ | |
1134 | list_add_tail(&ipm->list, &failed_list); | |
1135 | } else { | |
1136 | ipm->ipm_state = LCS_IPM_STATE_ON_CARD; | |
1137 | /* re-insert into ipm_list */ | |
1138 | list_add_tail(&ipm->list, &card->ipm_list); | |
1139 | } | |
1140 | goto list_modified; | |
1141 | case LCS_IPM_STATE_DEL_REQUIRED: | |
1142 | list_del(&ipm->list); | |
1143 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1144 | lcs_send_delipm(card, ipm); | |
1145 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1146 | kfree(ipm); | |
1147 | goto list_modified; | |
1148 | case LCS_IPM_STATE_ON_CARD: | |
1149 | break; | |
1150 | } | |
1151 | } | |
1152 | /* re-insert all entries from the failed_list into ipm_list */ | |
179e0917 AM |
1153 | list_for_each_entry_safe(ipm, tmp, &failed_list, list) |
1154 | list_move_tail(&ipm->list, &card->ipm_list); | |
1155 | ||
1da177e4 | 1156 | spin_unlock_irqrestore(&card->ipm_lock, flags); |
1da177e4 LT |
1157 | } |
1158 | ||
1159 | /** | |
1160 | * get mac address for the relevant Multicast address | |
1161 | */ | |
1162 | static void | |
5a5a852e | 1163 | lcs_get_mac_for_ipm(__be32 ipm, char *mac, struct net_device *dev) |
1da177e4 LT |
1164 | { |
1165 | LCS_DBF_TEXT(4,trace, "getmac"); | |
1abd2296 | 1166 | ip_eth_mc_map(ipm, mac); |
1da177e4 LT |
1167 | } |
1168 | ||
1169 | /** | |
1170 | * function called by net device to handle multicast address relevant things | |
1171 | */ | |
1172 | static inline void | |
1173 | lcs_remove_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) | |
1174 | { | |
1175 | struct ip_mc_list *im4; | |
1176 | struct list_head *l; | |
1177 | struct lcs_ipm_list *ipm; | |
1178 | unsigned long flags; | |
1179 | char buf[MAX_ADDR_LEN]; | |
1180 | ||
1181 | LCS_DBF_TEXT(4, trace, "remmclst"); | |
1182 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1183 | list_for_each(l, &card->ipm_list) { | |
1184 | ipm = list_entry(l, struct lcs_ipm_list, list); | |
f3aa3136 SS |
1185 | for (im4 = rcu_dereference(in4_dev->mc_list); |
1186 | im4 != NULL; im4 = rcu_dereference(im4->next_rcu)) { | |
1da177e4 LT |
1187 | lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); |
1188 | if ( (ipm->ipm.ip_addr == im4->multiaddr) && | |
1189 | (memcmp(buf, &ipm->ipm.mac_addr, | |
1190 | LCS_MAC_LENGTH) == 0) ) | |
1191 | break; | |
1192 | } | |
1193 | if (im4 == NULL) | |
1194 | ipm->ipm_state = LCS_IPM_STATE_DEL_REQUIRED; | |
1195 | } | |
1196 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1197 | } | |
1198 | ||
1199 | static inline struct lcs_ipm_list * | |
1200 | lcs_check_addr_entry(struct lcs_card *card, struct ip_mc_list *im4, char *buf) | |
1201 | { | |
1202 | struct lcs_ipm_list *tmp, *ipm = NULL; | |
1203 | struct list_head *l; | |
1204 | unsigned long flags; | |
1205 | ||
1206 | LCS_DBF_TEXT(4, trace, "chkmcent"); | |
1207 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1208 | list_for_each(l, &card->ipm_list) { | |
1209 | tmp = list_entry(l, struct lcs_ipm_list, list); | |
1210 | if ( (tmp->ipm.ip_addr == im4->multiaddr) && | |
1211 | (memcmp(buf, &tmp->ipm.mac_addr, | |
1212 | LCS_MAC_LENGTH) == 0) ) { | |
1213 | ipm = tmp; | |
1214 | break; | |
1215 | } | |
1216 | } | |
1217 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1218 | return ipm; | |
1219 | } | |
1220 | ||
1221 | static inline void | |
1222 | lcs_set_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) | |
1223 | { | |
1224 | ||
1225 | struct ip_mc_list *im4; | |
1226 | struct lcs_ipm_list *ipm; | |
1227 | char buf[MAX_ADDR_LEN]; | |
1228 | unsigned long flags; | |
1229 | ||
1230 | LCS_DBF_TEXT(4, trace, "setmclst"); | |
f3aa3136 SS |
1231 | for (im4 = rcu_dereference(in4_dev->mc_list); im4 != NULL; |
1232 | im4 = rcu_dereference(im4->next_rcu)) { | |
1da177e4 LT |
1233 | lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); |
1234 | ipm = lcs_check_addr_entry(card, im4, buf); | |
1235 | if (ipm != NULL) | |
1236 | continue; /* Address already in list. */ | |
ae57b20a | 1237 | ipm = kzalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC); |
1da177e4 | 1238 | if (ipm == NULL) { |
c99fc5da KW |
1239 | pr_info("Not enough memory to add" |
1240 | " new multicast entry!\n"); | |
1da177e4 LT |
1241 | break; |
1242 | } | |
1da177e4 LT |
1243 | memcpy(&ipm->ipm.mac_addr, buf, LCS_MAC_LENGTH); |
1244 | ipm->ipm.ip_addr = im4->multiaddr; | |
1245 | ipm->ipm_state = LCS_IPM_STATE_SET_REQUIRED; | |
1246 | spin_lock_irqsave(&card->ipm_lock, flags); | |
27eb5ac8 | 1247 | LCS_DBF_HEX(2,trace,&ipm->ipm.ip_addr,4); |
1da177e4 LT |
1248 | list_add(&ipm->list, &card->ipm_list); |
1249 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1250 | } | |
1251 | } | |
1252 | ||
1253 | static int | |
1254 | lcs_register_mc_addresses(void *data) | |
1255 | { | |
1256 | struct lcs_card *card; | |
1257 | struct in_device *in4_dev; | |
1258 | ||
1259 | card = (struct lcs_card *) data; | |
1da177e4 LT |
1260 | |
1261 | if (!lcs_do_run_thread(card, LCS_SET_MC_THREAD)) | |
1262 | return 0; | |
1263 | LCS_DBF_TEXT(4, trace, "regmulti"); | |
1264 | ||
1265 | in4_dev = in_dev_get(card->dev); | |
1266 | if (in4_dev == NULL) | |
1267 | goto out; | |
f3aa3136 | 1268 | rcu_read_lock(); |
1da177e4 LT |
1269 | lcs_remove_mc_addresses(card,in4_dev); |
1270 | lcs_set_mc_addresses(card, in4_dev); | |
f3aa3136 | 1271 | rcu_read_unlock(); |
1da177e4 LT |
1272 | in_dev_put(in4_dev); |
1273 | ||
27eb5ac8 KW |
1274 | netif_carrier_off(card->dev); |
1275 | netif_tx_disable(card->dev); | |
1276 | wait_event(card->write.wait_q, | |
9163bb2e | 1277 | (card->write.state != LCS_CH_STATE_RUNNING)); |
1da177e4 | 1278 | lcs_fix_multicast_list(card); |
27eb5ac8 KW |
1279 | if (card->state == DEV_STATE_UP) { |
1280 | netif_carrier_on(card->dev); | |
1281 | netif_wake_queue(card->dev); | |
1282 | } | |
1da177e4 LT |
1283 | out: |
1284 | lcs_clear_thread_running_bit(card, LCS_SET_MC_THREAD); | |
1285 | return 0; | |
1286 | } | |
801599b0 HC |
1287 | #endif /* CONFIG_IP_MULTICAST */ |
1288 | ||
1da177e4 LT |
1289 | /** |
1290 | * function called by net device to | |
1291 | * handle multicast address relevant things | |
1292 | */ | |
1293 | static void | |
1294 | lcs_set_multicast_list(struct net_device *dev) | |
1295 | { | |
801599b0 | 1296 | #ifdef CONFIG_IP_MULTICAST |
1da177e4 LT |
1297 | struct lcs_card *card; |
1298 | ||
1299 | LCS_DBF_TEXT(4, trace, "setmulti"); | |
ad660e2f | 1300 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 | 1301 | |
e82b0f2c | 1302 | if (!lcs_set_thread_start_bit(card, LCS_SET_MC_THREAD)) |
1da177e4 | 1303 | schedule_work(&card->kernel_thread_starter); |
1da177e4 | 1304 | #endif /* CONFIG_IP_MULTICAST */ |
801599b0 | 1305 | } |
1da177e4 LT |
1306 | |
1307 | static long | |
1308 | lcs_check_irb_error(struct ccw_device *cdev, struct irb *irb) | |
1309 | { | |
1310 | if (!IS_ERR(irb)) | |
1311 | return 0; | |
1312 | ||
1313 | switch (PTR_ERR(irb)) { | |
1314 | case -EIO: | |
c99fc5da KW |
1315 | dev_warn(&cdev->dev, |
1316 | "An I/O-error occurred on the LCS device\n"); | |
1da177e4 LT |
1317 | LCS_DBF_TEXT(2, trace, "ckirberr"); |
1318 | LCS_DBF_TEXT_(2, trace, " rc%d", -EIO); | |
1319 | break; | |
1320 | case -ETIMEDOUT: | |
c99fc5da KW |
1321 | dev_warn(&cdev->dev, |
1322 | "A command timed out on the LCS device\n"); | |
1da177e4 LT |
1323 | LCS_DBF_TEXT(2, trace, "ckirberr"); |
1324 | LCS_DBF_TEXT_(2, trace, " rc%d", -ETIMEDOUT); | |
1325 | break; | |
1326 | default: | |
c99fc5da KW |
1327 | dev_warn(&cdev->dev, |
1328 | "An error occurred on the LCS device, rc=%ld\n", | |
1329 | PTR_ERR(irb)); | |
1da177e4 LT |
1330 | LCS_DBF_TEXT(2, trace, "ckirberr"); |
1331 | LCS_DBF_TEXT(2, trace, " rc???"); | |
1332 | } | |
1333 | return PTR_ERR(irb); | |
1334 | } | |
1335 | ||
27eb5ac8 KW |
1336 | static int |
1337 | lcs_get_problem(struct ccw_device *cdev, struct irb *irb) | |
1338 | { | |
1339 | int dstat, cstat; | |
1340 | char *sense; | |
1341 | ||
1342 | sense = (char *) irb->ecw; | |
23d805b6 PO |
1343 | cstat = irb->scsw.cmd.cstat; |
1344 | dstat = irb->scsw.cmd.dstat; | |
27eb5ac8 KW |
1345 | |
1346 | if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK | | |
1347 | SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK | | |
1348 | SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) { | |
1349 | LCS_DBF_TEXT(2, trace, "CGENCHK"); | |
1350 | return 1; | |
1351 | } | |
1352 | if (dstat & DEV_STAT_UNIT_CHECK) { | |
1353 | if (sense[LCS_SENSE_BYTE_1] & | |
1354 | LCS_SENSE_RESETTING_EVENT) { | |
1355 | LCS_DBF_TEXT(2, trace, "REVIND"); | |
1356 | return 1; | |
1357 | } | |
1358 | if (sense[LCS_SENSE_BYTE_0] & | |
1359 | LCS_SENSE_CMD_REJECT) { | |
1360 | LCS_DBF_TEXT(2, trace, "CMDREJ"); | |
1361 | return 0; | |
1362 | } | |
1363 | if ((!sense[LCS_SENSE_BYTE_0]) && | |
1364 | (!sense[LCS_SENSE_BYTE_1]) && | |
1365 | (!sense[LCS_SENSE_BYTE_2]) && | |
1366 | (!sense[LCS_SENSE_BYTE_3])) { | |
1367 | LCS_DBF_TEXT(2, trace, "ZEROSEN"); | |
1368 | return 0; | |
1369 | } | |
1370 | LCS_DBF_TEXT(2, trace, "DGENCHK"); | |
1371 | return 1; | |
1372 | } | |
1373 | return 0; | |
1374 | } | |
1375 | ||
2b67fc46 | 1376 | static void |
27eb5ac8 KW |
1377 | lcs_schedule_recovery(struct lcs_card *card) |
1378 | { | |
1379 | LCS_DBF_TEXT(2, trace, "startrec"); | |
1380 | if (!lcs_set_thread_start_bit(card, LCS_RECOVERY_THREAD)) | |
1381 | schedule_work(&card->kernel_thread_starter); | |
1382 | } | |
1da177e4 LT |
1383 | |
1384 | /** | |
1385 | * IRQ Handler for LCS channels | |
1386 | */ | |
1387 | static void | |
1388 | lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb) | |
1389 | { | |
1390 | struct lcs_card *card; | |
1391 | struct lcs_channel *channel; | |
27eb5ac8 KW |
1392 | int rc, index; |
1393 | int cstat, dstat; | |
1da177e4 LT |
1394 | |
1395 | if (lcs_check_irb_error(cdev, irb)) | |
1396 | return; | |
1397 | ||
1398 | card = CARD_FROM_DEV(cdev); | |
1399 | if (card->read.ccwdev == cdev) | |
1400 | channel = &card->read; | |
1401 | else | |
1402 | channel = &card->write; | |
1403 | ||
23d805b6 PO |
1404 | cstat = irb->scsw.cmd.cstat; |
1405 | dstat = irb->scsw.cmd.dstat; | |
2a0217d5 | 1406 | LCS_DBF_TEXT_(5, trace, "Rint%s", dev_name(&cdev->dev)); |
23d805b6 PO |
1407 | LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.cstat, |
1408 | irb->scsw.cmd.dstat); | |
1409 | LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.fctl, | |
1410 | irb->scsw.cmd.actl); | |
1da177e4 | 1411 | |
27eb5ac8 KW |
1412 | /* Check for channel and device errors presented */ |
1413 | rc = lcs_get_problem(cdev, irb); | |
1414 | if (rc || (dstat & DEV_STAT_UNIT_EXCEP)) { | |
c99fc5da KW |
1415 | dev_warn(&cdev->dev, |
1416 | "The LCS device stopped because of an error," | |
1417 | " dstat=0x%X, cstat=0x%X \n", | |
1418 | dstat, cstat); | |
27eb5ac8 | 1419 | if (rc) { |
59579da3 | 1420 | channel->state = LCS_CH_STATE_ERROR; |
27eb5ac8 KW |
1421 | } |
1422 | } | |
59579da3 KW |
1423 | if (channel->state == LCS_CH_STATE_ERROR) { |
1424 | lcs_schedule_recovery(card); | |
1425 | wake_up(&card->wait_q); | |
1426 | return; | |
1427 | } | |
1da177e4 | 1428 | /* How far in the ccw chain have we processed? */ |
9163bb2e | 1429 | if ((channel->state != LCS_CH_STATE_INIT) && |
9b3b9ab6 KW |
1430 | (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) && |
1431 | (irb->scsw.cmd.cpa != 0)) { | |
23d805b6 | 1432 | index = (struct ccw1 *) __va((addr_t) irb->scsw.cmd.cpa) |
1da177e4 | 1433 | - channel->ccws; |
23d805b6 PO |
1434 | if ((irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) || |
1435 | (irb->scsw.cmd.cstat & SCHN_STAT_PCI)) | |
1da177e4 LT |
1436 | /* Bloody io subsystem tells us lies about cpa... */ |
1437 | index = (index - 1) & (LCS_NUM_BUFFS - 1); | |
1438 | while (channel->io_idx != index) { | |
1439 | __lcs_processed_buffer(channel, | |
1440 | channel->iob + channel->io_idx); | |
1441 | channel->io_idx = | |
1442 | (channel->io_idx + 1) & (LCS_NUM_BUFFS - 1); | |
1443 | } | |
1444 | } | |
1445 | ||
23d805b6 PO |
1446 | if ((irb->scsw.cmd.dstat & DEV_STAT_DEV_END) || |
1447 | (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) || | |
1448 | (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)) | |
1da177e4 | 1449 | /* Mark channel as stopped. */ |
9163bb2e | 1450 | channel->state = LCS_CH_STATE_STOPPED; |
23d805b6 | 1451 | else if (irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) |
1da177e4 | 1452 | /* CCW execution stopped on a suspend bit. */ |
9163bb2e | 1453 | channel->state = LCS_CH_STATE_SUSPENDED; |
23d805b6 PO |
1454 | if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) { |
1455 | if (irb->scsw.cmd.cc != 0) { | |
1da177e4 LT |
1456 | ccw_device_halt(channel->ccwdev, (addr_t) channel); |
1457 | return; | |
1458 | } | |
1459 | /* The channel has been stopped by halt_IO. */ | |
9163bb2e | 1460 | channel->state = LCS_CH_STATE_HALTED; |
1da177e4 | 1461 | } |
23d805b6 | 1462 | if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) |
9163bb2e | 1463 | channel->state = LCS_CH_STATE_CLEARED; |
1da177e4 LT |
1464 | /* Do the rest in the tasklet. */ |
1465 | tasklet_schedule(&channel->irq_tasklet); | |
1466 | } | |
1467 | ||
1468 | /** | |
1469 | * Tasklet for IRQ handler | |
1470 | */ | |
1471 | static void | |
1472 | lcs_tasklet(unsigned long data) | |
1473 | { | |
1474 | unsigned long flags; | |
1475 | struct lcs_channel *channel; | |
1476 | struct lcs_buffer *iob; | |
1477 | int buf_idx; | |
1da177e4 LT |
1478 | |
1479 | channel = (struct lcs_channel *) data; | |
2a0217d5 | 1480 | LCS_DBF_TEXT_(5, trace, "tlet%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
1481 | |
1482 | /* Check for processed buffers. */ | |
1483 | iob = channel->iob; | |
1484 | buf_idx = channel->buf_idx; | |
9163bb2e | 1485 | while (iob[buf_idx].state == LCS_BUF_STATE_PROCESSED) { |
1da177e4 LT |
1486 | /* Do the callback thing. */ |
1487 | if (iob[buf_idx].callback != NULL) | |
1488 | iob[buf_idx].callback(channel, iob + buf_idx); | |
1489 | buf_idx = (buf_idx + 1) & (LCS_NUM_BUFFS - 1); | |
1490 | } | |
1491 | channel->buf_idx = buf_idx; | |
1492 | ||
9163bb2e | 1493 | if (channel->state == LCS_CH_STATE_STOPPED) |
424f73b3 | 1494 | lcs_start_channel(channel); |
1da177e4 | 1495 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
9163bb2e | 1496 | if (channel->state == LCS_CH_STATE_SUSPENDED && |
424f73b3 HC |
1497 | channel->iob[channel->io_idx].state == LCS_BUF_STATE_READY) |
1498 | __lcs_resume_channel(channel); | |
1da177e4 LT |
1499 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); |
1500 | ||
1501 | /* Something happened on the channel. Wake up waiters. */ | |
1502 | wake_up(&channel->wait_q); | |
1503 | } | |
1504 | ||
1505 | /** | |
1506 | * Finish current tx buffer and make it ready for transmit. | |
1507 | */ | |
1508 | static void | |
1509 | __lcs_emit_txbuffer(struct lcs_card *card) | |
1510 | { | |
1511 | LCS_DBF_TEXT(5, trace, "emittx"); | |
1512 | *(__u16 *)(card->tx_buffer->data + card->tx_buffer->count) = 0; | |
1513 | card->tx_buffer->count += 2; | |
1514 | lcs_ready_buffer(&card->write, card->tx_buffer); | |
1515 | card->tx_buffer = NULL; | |
1516 | card->tx_emitted++; | |
1517 | } | |
1518 | ||
1519 | /** | |
1520 | * Callback for finished tx buffers. | |
1521 | */ | |
1522 | static void | |
1523 | lcs_txbuffer_cb(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
1524 | { | |
1525 | struct lcs_card *card; | |
1526 | ||
1527 | LCS_DBF_TEXT(5, trace, "txbuffcb"); | |
1528 | /* Put buffer back to pool. */ | |
1529 | lcs_release_buffer(channel, buffer); | |
b385a144 | 1530 | card = container_of(channel, struct lcs_card, write); |
27eb5ac8 | 1531 | if (netif_queue_stopped(card->dev) && netif_carrier_ok(card->dev)) |
0d613a27 | 1532 | netif_wake_queue(card->dev); |
1da177e4 LT |
1533 | spin_lock(&card->lock); |
1534 | card->tx_emitted--; | |
1535 | if (card->tx_emitted <= 0 && card->tx_buffer != NULL) | |
1536 | /* | |
1537 | * Last running tx buffer has finished. Submit partially | |
1538 | * filled current buffer. | |
1539 | */ | |
1540 | __lcs_emit_txbuffer(card); | |
1541 | spin_unlock(&card->lock); | |
1542 | } | |
1543 | ||
1544 | /** | |
1545 | * Packet transmit function called by network stack | |
1546 | */ | |
1547 | static int | |
1548 | __lcs_start_xmit(struct lcs_card *card, struct sk_buff *skb, | |
1549 | struct net_device *dev) | |
1550 | { | |
1551 | struct lcs_header *header; | |
ec634fe3 | 1552 | int rc = NETDEV_TX_OK; |
1da177e4 LT |
1553 | |
1554 | LCS_DBF_TEXT(5, trace, "hardxmit"); | |
1555 | if (skb == NULL) { | |
1556 | card->stats.tx_dropped++; | |
1557 | card->stats.tx_errors++; | |
ec634fe3 | 1558 | return NETDEV_TX_OK; |
1da177e4 LT |
1559 | } |
1560 | if (card->state != DEV_STATE_UP) { | |
1561 | dev_kfree_skb(skb); | |
1562 | card->stats.tx_dropped++; | |
1563 | card->stats.tx_errors++; | |
1564 | card->stats.tx_carrier_errors++; | |
ec634fe3 | 1565 | return NETDEV_TX_OK; |
1da177e4 | 1566 | } |
27eb5ac8 KW |
1567 | if (skb->protocol == htons(ETH_P_IPV6)) { |
1568 | dev_kfree_skb(skb); | |
ec634fe3 | 1569 | return NETDEV_TX_OK; |
27eb5ac8 | 1570 | } |
0d613a27 FP |
1571 | netif_stop_queue(card->dev); |
1572 | spin_lock(&card->lock); | |
1da177e4 LT |
1573 | if (card->tx_buffer != NULL && |
1574 | card->tx_buffer->count + sizeof(struct lcs_header) + | |
1575 | skb->len + sizeof(u16) > LCS_IOBUFFERSIZE) | |
1576 | /* skb too big for current tx buffer. */ | |
1577 | __lcs_emit_txbuffer(card); | |
1578 | if (card->tx_buffer == NULL) { | |
1579 | /* Get new tx buffer */ | |
1580 | card->tx_buffer = lcs_get_buffer(&card->write); | |
1581 | if (card->tx_buffer == NULL) { | |
1582 | card->stats.tx_dropped++; | |
9e669d32 | 1583 | rc = NETDEV_TX_BUSY; |
0d613a27 | 1584 | goto out; |
1da177e4 LT |
1585 | } |
1586 | card->tx_buffer->callback = lcs_txbuffer_cb; | |
1587 | card->tx_buffer->count = 0; | |
1588 | } | |
1589 | header = (struct lcs_header *) | |
1590 | (card->tx_buffer->data + card->tx_buffer->count); | |
1591 | card->tx_buffer->count += skb->len + sizeof(struct lcs_header); | |
1592 | header->offset = card->tx_buffer->count; | |
1593 | header->type = card->lan_type; | |
1594 | header->slot = card->portno; | |
d626f62b | 1595 | skb_copy_from_linear_data(skb, header + 1, skb->len); |
0d613a27 | 1596 | spin_unlock(&card->lock); |
1da177e4 LT |
1597 | card->stats.tx_bytes += skb->len; |
1598 | card->stats.tx_packets++; | |
1599 | dev_kfree_skb(skb); | |
0d613a27 FP |
1600 | netif_wake_queue(card->dev); |
1601 | spin_lock(&card->lock); | |
1602 | if (card->tx_emitted <= 0 && card->tx_buffer != NULL) | |
1da177e4 LT |
1603 | /* If this is the first tx buffer emit it immediately. */ |
1604 | __lcs_emit_txbuffer(card); | |
0d613a27 FP |
1605 | out: |
1606 | spin_unlock(&card->lock); | |
1607 | return rc; | |
1da177e4 LT |
1608 | } |
1609 | ||
1610 | static int | |
1611 | lcs_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1612 | { | |
1613 | struct lcs_card *card; | |
1614 | int rc; | |
1615 | ||
1616 | LCS_DBF_TEXT(5, trace, "pktxmit"); | |
ad660e2f | 1617 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 | 1618 | rc = __lcs_start_xmit(card, skb, dev); |
1da177e4 LT |
1619 | return rc; |
1620 | } | |
1621 | ||
1622 | /** | |
1623 | * send startlan and lanstat command to make LCS device ready | |
1624 | */ | |
1625 | static int | |
1626 | lcs_startlan_auto(struct lcs_card *card) | |
1627 | { | |
1628 | int rc; | |
1629 | ||
1630 | LCS_DBF_TEXT(2, trace, "strtauto"); | |
1e495701 | 1631 | #ifdef CONFIG_ETHERNET |
1da177e4 LT |
1632 | card->lan_type = LCS_FRAME_TYPE_ENET; |
1633 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1634 | if (rc == 0) | |
1635 | return 0; | |
1636 | ||
1637 | #endif | |
1da177e4 LT |
1638 | #ifdef CONFIG_FDDI |
1639 | card->lan_type = LCS_FRAME_TYPE_FDDI; | |
1640 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1641 | if (rc == 0) | |
1642 | return 0; | |
1643 | #endif | |
1644 | return -EIO; | |
1645 | } | |
1646 | ||
1647 | static int | |
1648 | lcs_startlan(struct lcs_card *card) | |
1649 | { | |
1650 | int rc, i; | |
1651 | ||
1652 | LCS_DBF_TEXT(2, trace, "startlan"); | |
1653 | rc = 0; | |
1654 | if (card->portno != LCS_INVALID_PORT_NO) { | |
1655 | if (card->lan_type == LCS_FRAME_TYPE_AUTO) | |
1656 | rc = lcs_startlan_auto(card); | |
1657 | else | |
1658 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1659 | } else { | |
1660 | for (i = 0; i <= 16; i++) { | |
1661 | card->portno = i; | |
1662 | if (card->lan_type != LCS_FRAME_TYPE_AUTO) | |
1663 | rc = lcs_send_startlan(card, | |
1664 | LCS_INITIATOR_TCPIP); | |
1665 | else | |
1666 | /* autodetecting lan type */ | |
1667 | rc = lcs_startlan_auto(card); | |
1668 | if (rc == 0) | |
1669 | break; | |
1670 | } | |
1671 | } | |
1672 | if (rc == 0) | |
1673 | return lcs_send_lanstat(card); | |
1674 | return rc; | |
1675 | } | |
1676 | ||
1677 | /** | |
1678 | * LCS detect function | |
1679 | * setup channels and make them I/O ready | |
1680 | */ | |
1681 | static int | |
1682 | lcs_detect(struct lcs_card *card) | |
1683 | { | |
1684 | int rc = 0; | |
1685 | ||
1686 | LCS_DBF_TEXT(2, setup, "lcsdetct"); | |
1687 | /* start/reset card */ | |
1688 | if (card->dev) | |
1689 | netif_stop_queue(card->dev); | |
1690 | rc = lcs_stop_channels(card); | |
1691 | if (rc == 0) { | |
1692 | rc = lcs_start_channels(card); | |
1693 | if (rc == 0) { | |
1694 | rc = lcs_send_startup(card, LCS_INITIATOR_TCPIP); | |
1695 | if (rc == 0) | |
1696 | rc = lcs_startlan(card); | |
1697 | } | |
1698 | } | |
1699 | if (rc == 0) { | |
1700 | card->state = DEV_STATE_UP; | |
1701 | } else { | |
1702 | card->state = DEV_STATE_DOWN; | |
9163bb2e UB |
1703 | card->write.state = LCS_CH_STATE_INIT; |
1704 | card->read.state = LCS_CH_STATE_INIT; | |
1da177e4 LT |
1705 | } |
1706 | return rc; | |
1707 | } | |
1708 | ||
1da177e4 LT |
1709 | /** |
1710 | * LCS Stop card | |
1711 | */ | |
1712 | static int | |
1713 | lcs_stopcard(struct lcs_card *card) | |
1714 | { | |
1715 | int rc; | |
1716 | ||
1717 | LCS_DBF_TEXT(3, setup, "stopcard"); | |
1718 | ||
9163bb2e UB |
1719 | if (card->read.state != LCS_CH_STATE_STOPPED && |
1720 | card->write.state != LCS_CH_STATE_STOPPED && | |
59579da3 KW |
1721 | card->read.state != LCS_CH_STATE_ERROR && |
1722 | card->write.state != LCS_CH_STATE_ERROR && | |
1da177e4 LT |
1723 | card->state == DEV_STATE_UP) { |
1724 | lcs_clear_multicast_list(card); | |
1725 | rc = lcs_send_stoplan(card,LCS_INITIATOR_TCPIP); | |
1726 | rc = lcs_send_shutdown(card); | |
1727 | } | |
1728 | rc = lcs_stop_channels(card); | |
1729 | card->state = DEV_STATE_DOWN; | |
1730 | ||
1731 | return rc; | |
1732 | } | |
1733 | ||
1da177e4 LT |
1734 | /** |
1735 | * Kernel Thread helper functions for LGW initiated commands | |
1736 | */ | |
1737 | static void | |
4927b3f7 | 1738 | lcs_start_kernel_thread(struct work_struct *work) |
1da177e4 | 1739 | { |
4927b3f7 | 1740 | struct lcs_card *card = container_of(work, struct lcs_card, kernel_thread_starter); |
1da177e4 | 1741 | LCS_DBF_TEXT(5, trace, "krnthrd"); |
27eb5ac8 | 1742 | if (lcs_do_start_thread(card, LCS_RECOVERY_THREAD)) |
e5b5719b | 1743 | kthread_run(lcs_recovery, card, "lcs_recover"); |
1da177e4 LT |
1744 | #ifdef CONFIG_IP_MULTICAST |
1745 | if (lcs_do_start_thread(card, LCS_SET_MC_THREAD)) | |
e5b5719b | 1746 | kthread_run(lcs_register_mc_addresses, card, "regipm"); |
1da177e4 LT |
1747 | #endif |
1748 | } | |
1749 | ||
1750 | /** | |
1751 | * Process control frames. | |
1752 | */ | |
1753 | static void | |
1754 | lcs_get_control(struct lcs_card *card, struct lcs_cmd *cmd) | |
1755 | { | |
1756 | LCS_DBF_TEXT(5, trace, "getctrl"); | |
1757 | if (cmd->initiator == LCS_INITIATOR_LGW) { | |
1758 | switch(cmd->cmd_code) { | |
1759 | case LCS_CMD_STARTUP: | |
1da177e4 | 1760 | case LCS_CMD_STARTLAN: |
27eb5ac8 | 1761 | lcs_schedule_recovery(card); |
1da177e4 LT |
1762 | break; |
1763 | case LCS_CMD_STOPLAN: | |
c99fc5da KW |
1764 | pr_warning("Stoplan for %s initiated by LGW.\n", |
1765 | card->dev->name); | |
27eb5ac8 KW |
1766 | if (card->dev) |
1767 | netif_carrier_off(card->dev); | |
1da177e4 LT |
1768 | break; |
1769 | default: | |
6b648063 | 1770 | LCS_DBF_TEXT(5, trace, "noLGWcmd"); |
1da177e4 LT |
1771 | break; |
1772 | } | |
1773 | } else | |
1774 | lcs_notify_lancmd_waiters(card, cmd); | |
1775 | } | |
1776 | ||
1777 | /** | |
1778 | * Unpack network packet. | |
1779 | */ | |
1780 | static void | |
1781 | lcs_get_skb(struct lcs_card *card, char *skb_data, unsigned int skb_len) | |
1782 | { | |
1783 | struct sk_buff *skb; | |
1784 | ||
1785 | LCS_DBF_TEXT(5, trace, "getskb"); | |
1786 | if (card->dev == NULL || | |
1787 | card->state != DEV_STATE_UP) | |
1788 | /* The card isn't up. Ignore the packet. */ | |
1789 | return; | |
1790 | ||
1791 | skb = dev_alloc_skb(skb_len); | |
1792 | if (skb == NULL) { | |
c99fc5da KW |
1793 | dev_err(&card->dev->dev, |
1794 | " Allocating a socket buffer to interface %s failed\n", | |
1da177e4 LT |
1795 | card->dev->name); |
1796 | card->stats.rx_dropped++; | |
1797 | return; | |
1798 | } | |
1da177e4 LT |
1799 | memcpy(skb_put(skb, skb_len), skb_data, skb_len); |
1800 | skb->protocol = card->lan_type_trans(skb, card->dev); | |
1801 | card->stats.rx_bytes += skb_len; | |
1802 | card->stats.rx_packets++; | |
93ad37d9 KW |
1803 | if (skb->protocol == htons(ETH_P_802_2)) |
1804 | *((__u32 *)skb->cb) = ++card->pkt_seq; | |
1da177e4 LT |
1805 | netif_rx(skb); |
1806 | } | |
1807 | ||
1808 | /** | |
1809 | * LCS main routine to get packets and lancmd replies from the buffers | |
1810 | */ | |
1811 | static void | |
1812 | lcs_get_frames_cb(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
1813 | { | |
1814 | struct lcs_card *card; | |
1815 | struct lcs_header *lcs_hdr; | |
1816 | __u16 offset; | |
1817 | ||
1818 | LCS_DBF_TEXT(5, trace, "lcsgtpkt"); | |
1819 | lcs_hdr = (struct lcs_header *) buffer->data; | |
1820 | if (lcs_hdr->offset == LCS_ILLEGAL_OFFSET) { | |
1821 | LCS_DBF_TEXT(4, trace, "-eiogpkt"); | |
1822 | return; | |
1823 | } | |
b385a144 | 1824 | card = container_of(channel, struct lcs_card, read); |
1da177e4 LT |
1825 | offset = 0; |
1826 | while (lcs_hdr->offset != 0) { | |
1827 | if (lcs_hdr->offset <= 0 || | |
1828 | lcs_hdr->offset > LCS_IOBUFFERSIZE || | |
1829 | lcs_hdr->offset < offset) { | |
1830 | /* Offset invalid. */ | |
1831 | card->stats.rx_length_errors++; | |
1832 | card->stats.rx_errors++; | |
1833 | return; | |
1834 | } | |
1835 | /* What kind of frame is it? */ | |
1836 | if (lcs_hdr->type == LCS_FRAME_TYPE_CONTROL) | |
1837 | /* Control frame. */ | |
1838 | lcs_get_control(card, (struct lcs_cmd *) lcs_hdr); | |
1839 | else if (lcs_hdr->type == LCS_FRAME_TYPE_ENET || | |
1840 | lcs_hdr->type == LCS_FRAME_TYPE_TR || | |
1841 | lcs_hdr->type == LCS_FRAME_TYPE_FDDI) | |
1842 | /* Normal network packet. */ | |
1843 | lcs_get_skb(card, (char *)(lcs_hdr + 1), | |
1844 | lcs_hdr->offset - offset - | |
1845 | sizeof(struct lcs_header)); | |
1846 | else | |
1847 | /* Unknown frame type. */ | |
1848 | ; // FIXME: error message ? | |
1849 | /* Proceed to next frame. */ | |
1850 | offset = lcs_hdr->offset; | |
1851 | lcs_hdr->offset = LCS_ILLEGAL_OFFSET; | |
1852 | lcs_hdr = (struct lcs_header *) (buffer->data + offset); | |
1853 | } | |
1854 | /* The buffer is now empty. Make it ready again. */ | |
1855 | lcs_ready_buffer(&card->read, buffer); | |
1856 | } | |
1857 | ||
1858 | /** | |
1859 | * get network statistics for ifconfig and other user programs | |
1860 | */ | |
1861 | static struct net_device_stats * | |
1862 | lcs_getstats(struct net_device *dev) | |
1863 | { | |
1864 | struct lcs_card *card; | |
1865 | ||
1866 | LCS_DBF_TEXT(4, trace, "netstats"); | |
ad660e2f | 1867 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 LT |
1868 | return &card->stats; |
1869 | } | |
1870 | ||
1871 | /** | |
1872 | * stop lcs device | |
1873 | * This function will be called by user doing ifconfig xxx down | |
1874 | */ | |
1875 | static int | |
1876 | lcs_stop_device(struct net_device *dev) | |
1877 | { | |
1878 | struct lcs_card *card; | |
1879 | int rc; | |
1880 | ||
1881 | LCS_DBF_TEXT(2, trace, "stopdev"); | |
ad660e2f | 1882 | card = (struct lcs_card *) dev->ml_priv; |
27eb5ac8 KW |
1883 | netif_carrier_off(dev); |
1884 | netif_tx_disable(dev); | |
1da177e4 | 1885 | dev->flags &= ~IFF_UP; |
27eb5ac8 | 1886 | wait_event(card->write.wait_q, |
9163bb2e | 1887 | (card->write.state != LCS_CH_STATE_RUNNING)); |
1da177e4 LT |
1888 | rc = lcs_stopcard(card); |
1889 | if (rc) | |
c99fc5da KW |
1890 | dev_err(&card->dev->dev, |
1891 | " Shutting down the LCS device failed\n "); | |
1da177e4 LT |
1892 | return rc; |
1893 | } | |
1894 | ||
1895 | /** | |
1896 | * start lcs device and make it runnable | |
1897 | * This function will be called by user doing ifconfig xxx up | |
1898 | */ | |
1899 | static int | |
1900 | lcs_open_device(struct net_device *dev) | |
1901 | { | |
1902 | struct lcs_card *card; | |
1903 | int rc; | |
1904 | ||
1905 | LCS_DBF_TEXT(2, trace, "opendev"); | |
ad660e2f | 1906 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 LT |
1907 | /* initialize statistics */ |
1908 | rc = lcs_detect(card); | |
1909 | if (rc) { | |
c99fc5da | 1910 | pr_err("Error in opening device!\n"); |
1da177e4 LT |
1911 | |
1912 | } else { | |
1913 | dev->flags |= IFF_UP; | |
27eb5ac8 | 1914 | netif_carrier_on(dev); |
1da177e4 LT |
1915 | netif_wake_queue(dev); |
1916 | card->state = DEV_STATE_UP; | |
1917 | } | |
1918 | return rc; | |
1919 | } | |
1920 | ||
1921 | /** | |
1922 | * show function for portno called by cat or similar things | |
1923 | */ | |
1924 | static ssize_t | |
3fd3c0a5 | 1925 | lcs_portno_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1926 | { |
1927 | struct lcs_card *card; | |
1928 | ||
dff59b64 | 1929 | card = dev_get_drvdata(dev); |
1da177e4 LT |
1930 | |
1931 | if (!card) | |
1932 | return 0; | |
1933 | ||
1934 | return sprintf(buf, "%d\n", card->portno); | |
1935 | } | |
1936 | ||
1937 | /** | |
1938 | * store the value which is piped to file portno | |
1939 | */ | |
1940 | static ssize_t | |
3fd3c0a5 | 1941 | lcs_portno_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1942 | { |
1943 | struct lcs_card *card; | |
786f0065 TR |
1944 | int rc; |
1945 | s16 value; | |
1da177e4 | 1946 | |
dff59b64 | 1947 | card = dev_get_drvdata(dev); |
1da177e4 LT |
1948 | |
1949 | if (!card) | |
1950 | return 0; | |
1951 | ||
786f0065 TR |
1952 | rc = kstrtos16(buf, 0, &value); |
1953 | if (rc) | |
a68be015 | 1954 | return -EINVAL; |
1da177e4 LT |
1955 | /* TODO: sanity checks */ |
1956 | card->portno = value; | |
1957 | ||
1958 | return count; | |
1959 | ||
1960 | } | |
1961 | ||
1962 | static DEVICE_ATTR(portno, 0644, lcs_portno_show, lcs_portno_store); | |
1963 | ||
c4736d96 | 1964 | static const char *lcs_type[] = { |
0ca8cc6f UB |
1965 | "not a channel", |
1966 | "2216 parallel", | |
1967 | "2216 channel", | |
1968 | "OSA LCS card", | |
1969 | "unknown channel type", | |
1970 | "unsupported channel type", | |
1971 | }; | |
1972 | ||
1da177e4 | 1973 | static ssize_t |
3fd3c0a5 | 1974 | lcs_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1975 | { |
1976 | struct ccwgroup_device *cgdev; | |
1977 | ||
1978 | cgdev = to_ccwgroupdev(dev); | |
1979 | if (!cgdev) | |
1980 | return -ENODEV; | |
1981 | ||
0ca8cc6f | 1982 | return sprintf(buf, "%s\n", lcs_type[cgdev->cdev[0]->id.driver_info]); |
1da177e4 LT |
1983 | } |
1984 | ||
1985 | static DEVICE_ATTR(type, 0444, lcs_type_show, NULL); | |
1986 | ||
1987 | static ssize_t | |
3fd3c0a5 | 1988 | lcs_timeout_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1989 | { |
1990 | struct lcs_card *card; | |
1991 | ||
dff59b64 | 1992 | card = dev_get_drvdata(dev); |
1da177e4 LT |
1993 | |
1994 | return card ? sprintf(buf, "%u\n", card->lancmd_timeout) : 0; | |
1995 | } | |
1996 | ||
1997 | static ssize_t | |
3fd3c0a5 | 1998 | lcs_timeout_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1999 | { |
2000 | struct lcs_card *card; | |
a68be015 UB |
2001 | unsigned int value; |
2002 | int rc; | |
1da177e4 | 2003 | |
dff59b64 | 2004 | card = dev_get_drvdata(dev); |
1da177e4 LT |
2005 | |
2006 | if (!card) | |
2007 | return 0; | |
2008 | ||
786f0065 TR |
2009 | rc = kstrtouint(buf, 0, &value); |
2010 | if (rc) | |
a68be015 | 2011 | return -EINVAL; |
1da177e4 LT |
2012 | /* TODO: sanity checks */ |
2013 | card->lancmd_timeout = value; | |
2014 | ||
2015 | return count; | |
2016 | ||
2017 | } | |
2018 | ||
2b67fc46 | 2019 | static DEVICE_ATTR(lancmd_timeout, 0644, lcs_timeout_show, lcs_timeout_store); |
1da177e4 | 2020 | |
27eb5ac8 | 2021 | static ssize_t |
e82b0f2c | 2022 | lcs_dev_recover_store(struct device *dev, struct device_attribute *attr, |
27eb5ac8 KW |
2023 | const char *buf, size_t count) |
2024 | { | |
dff59b64 | 2025 | struct lcs_card *card = dev_get_drvdata(dev); |
27eb5ac8 KW |
2026 | char *tmp; |
2027 | int i; | |
2028 | ||
2029 | if (!card) | |
2030 | return -EINVAL; | |
2031 | if (card->state != DEV_STATE_UP) | |
2032 | return -EPERM; | |
2033 | i = simple_strtoul(buf, &tmp, 16); | |
2034 | if (i == 1) | |
2035 | lcs_schedule_recovery(card); | |
2036 | return count; | |
2037 | } | |
2038 | ||
2039 | static DEVICE_ATTR(recover, 0200, NULL, lcs_dev_recover_store); | |
2040 | ||
1da177e4 LT |
2041 | static struct attribute * lcs_attrs[] = { |
2042 | &dev_attr_portno.attr, | |
2043 | &dev_attr_type.attr, | |
2044 | &dev_attr_lancmd_timeout.attr, | |
27eb5ac8 | 2045 | &dev_attr_recover.attr, |
1da177e4 LT |
2046 | NULL, |
2047 | }; | |
1da177e4 LT |
2048 | static struct attribute_group lcs_attr_group = { |
2049 | .attrs = lcs_attrs, | |
2050 | }; | |
00d5bdd1 SO |
2051 | static const struct attribute_group *lcs_attr_groups[] = { |
2052 | &lcs_attr_group, | |
2053 | NULL, | |
2054 | }; | |
2055 | static const struct device_type lcs_devtype = { | |
2056 | .name = "lcs", | |
2057 | .groups = lcs_attr_groups, | |
2058 | }; | |
1da177e4 LT |
2059 | |
2060 | /** | |
2061 | * lcs_probe_device is called on establishing a new ccwgroup_device. | |
2062 | */ | |
2063 | static int | |
2064 | lcs_probe_device(struct ccwgroup_device *ccwgdev) | |
2065 | { | |
2066 | struct lcs_card *card; | |
1da177e4 LT |
2067 | |
2068 | if (!get_device(&ccwgdev->dev)) | |
2069 | return -ENODEV; | |
2070 | ||
2071 | LCS_DBF_TEXT(2, setup, "add_dev"); | |
2072 | card = lcs_alloc_card(); | |
2073 | if (!card) { | |
6b648063 | 2074 | LCS_DBF_TEXT_(2, setup, " rc%d", -ENOMEM); |
1da177e4 LT |
2075 | put_device(&ccwgdev->dev); |
2076 | return -ENOMEM; | |
2077 | } | |
dff59b64 | 2078 | dev_set_drvdata(&ccwgdev->dev, card); |
1da177e4 LT |
2079 | ccwgdev->cdev[0]->handler = lcs_irq; |
2080 | ccwgdev->cdev[1]->handler = lcs_irq; | |
27eb5ac8 | 2081 | card->gdev = ccwgdev; |
4927b3f7 | 2082 | INIT_WORK(&card->kernel_thread_starter, lcs_start_kernel_thread); |
27eb5ac8 KW |
2083 | card->thread_start_mask = 0; |
2084 | card->thread_allowed_mask = 0; | |
2085 | card->thread_running_mask = 0; | |
00d5bdd1 SO |
2086 | ccwgdev->dev.type = &lcs_devtype; |
2087 | ||
2088 | return 0; | |
1da177e4 LT |
2089 | } |
2090 | ||
2091 | static int | |
2092 | lcs_register_netdev(struct ccwgroup_device *ccwgdev) | |
2093 | { | |
2094 | struct lcs_card *card; | |
2095 | ||
2096 | LCS_DBF_TEXT(2, setup, "regnetdv"); | |
dff59b64 | 2097 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2098 | if (card->dev->reg_state != NETREG_UNINITIALIZED) |
2099 | return 0; | |
2100 | SET_NETDEV_DEV(card->dev, &ccwgdev->dev); | |
2101 | return register_netdev(card->dev); | |
2102 | } | |
2103 | ||
2104 | /** | |
2105 | * lcs_new_device will be called by setting the group device online. | |
2106 | */ | |
0e0b46d8 FB |
2107 | static const struct net_device_ops lcs_netdev_ops = { |
2108 | .ndo_open = lcs_open_device, | |
2109 | .ndo_stop = lcs_stop_device, | |
2110 | .ndo_get_stats = lcs_getstats, | |
2111 | .ndo_start_xmit = lcs_start_xmit, | |
2112 | }; | |
2113 | ||
2114 | static const struct net_device_ops lcs_mc_netdev_ops = { | |
2115 | .ndo_open = lcs_open_device, | |
2116 | .ndo_stop = lcs_stop_device, | |
2117 | .ndo_get_stats = lcs_getstats, | |
2118 | .ndo_start_xmit = lcs_start_xmit, | |
afc4b13d | 2119 | .ndo_set_rx_mode = lcs_set_multicast_list, |
0e0b46d8 | 2120 | }; |
1da177e4 LT |
2121 | |
2122 | static int | |
2123 | lcs_new_device(struct ccwgroup_device *ccwgdev) | |
2124 | { | |
2125 | struct lcs_card *card; | |
2126 | struct net_device *dev=NULL; | |
2127 | enum lcs_dev_states recover_state; | |
2128 | int rc; | |
2129 | ||
dff59b64 | 2130 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2131 | if (!card) |
2132 | return -ENODEV; | |
2133 | ||
2134 | LCS_DBF_TEXT(2, setup, "newdev"); | |
2135 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2136 | card->read.ccwdev = ccwgdev->cdev[0]; | |
2137 | card->write.ccwdev = ccwgdev->cdev[1]; | |
2138 | ||
2139 | recover_state = card->state; | |
d816d423 KDW |
2140 | rc = ccw_device_set_online(card->read.ccwdev); |
2141 | if (rc) | |
2142 | goto out_err; | |
2143 | rc = ccw_device_set_online(card->write.ccwdev); | |
2144 | if (rc) | |
2145 | goto out_werr; | |
1da177e4 LT |
2146 | |
2147 | LCS_DBF_TEXT(3, setup, "lcsnewdv"); | |
2148 | ||
2149 | lcs_setup_card(card); | |
2150 | rc = lcs_detect(card); | |
2151 | if (rc) { | |
2152 | LCS_DBF_TEXT(2, setup, "dtctfail"); | |
89a2a8e7 | 2153 | dev_err(&ccwgdev->dev, |
c99fc5da KW |
2154 | "Detecting a network adapter for LCS devices" |
2155 | " failed with rc=%d (0x%x)\n", rc, rc); | |
1da177e4 LT |
2156 | lcs_stopcard(card); |
2157 | goto out; | |
2158 | } | |
2159 | if (card->dev) { | |
2160 | LCS_DBF_TEXT(2, setup, "samedev"); | |
2161 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2162 | goto netdev_out; | |
2163 | } | |
2164 | switch (card->lan_type) { | |
1e495701 | 2165 | #ifdef CONFIG_ETHERNET |
1da177e4 LT |
2166 | case LCS_FRAME_TYPE_ENET: |
2167 | card->lan_type_trans = eth_type_trans; | |
2168 | dev = alloc_etherdev(0); | |
2169 | break; | |
2170 | #endif | |
1da177e4 LT |
2171 | #ifdef CONFIG_FDDI |
2172 | case LCS_FRAME_TYPE_FDDI: | |
2173 | card->lan_type_trans = fddi_type_trans; | |
2174 | dev = alloc_fddidev(0); | |
2175 | break; | |
2176 | #endif | |
2177 | default: | |
2178 | LCS_DBF_TEXT(3, setup, "errinit"); | |
c99fc5da | 2179 | pr_err(" Initialization failed\n"); |
1da177e4 LT |
2180 | goto out; |
2181 | } | |
2182 | if (!dev) | |
2183 | goto out; | |
2184 | card->dev = dev; | |
ad660e2f | 2185 | card->dev->ml_priv = card; |
0e0b46d8 | 2186 | card->dev->netdev_ops = &lcs_netdev_ops; |
1da177e4 LT |
2187 | memcpy(card->dev->dev_addr, card->mac, LCS_MAC_LENGTH); |
2188 | #ifdef CONFIG_IP_MULTICAST | |
2189 | if (!lcs_check_multicast_support(card)) | |
0e0b46d8 | 2190 | card->dev->netdev_ops = &lcs_mc_netdev_ops; |
1da177e4 | 2191 | #endif |
b5f9d55b | 2192 | netdev_out: |
1da177e4 LT |
2193 | lcs_set_allowed_threads(card,0xffffffff); |
2194 | if (recover_state == DEV_STATE_RECOVER) { | |
2195 | lcs_set_multicast_list(card->dev); | |
2196 | card->dev->flags |= IFF_UP; | |
27eb5ac8 | 2197 | netif_carrier_on(card->dev); |
1da177e4 LT |
2198 | netif_wake_queue(card->dev); |
2199 | card->state = DEV_STATE_UP; | |
b5f9d55b | 2200 | } else { |
1da177e4 | 2201 | lcs_stopcard(card); |
b5f9d55b | 2202 | } |
1da177e4 | 2203 | |
b5f9d55b FP |
2204 | if (lcs_register_netdev(ccwgdev) != 0) |
2205 | goto out; | |
2206 | ||
2207 | /* Print out supported assists: IPv6 */ | |
c99fc5da KW |
2208 | pr_info("LCS device %s %s IPv6 support\n", card->dev->name, |
2209 | (card->ip_assists_supported & LCS_IPASS_IPV6_SUPPORT) ? | |
2210 | "with" : "without"); | |
b5f9d55b | 2211 | /* Print out supported assist: Multicast */ |
c99fc5da KW |
2212 | pr_info("LCS device %s %s Multicast support\n", card->dev->name, |
2213 | (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) ? | |
2214 | "with" : "without"); | |
1da177e4 LT |
2215 | return 0; |
2216 | out: | |
2217 | ||
1da177e4 | 2218 | ccw_device_set_offline(card->write.ccwdev); |
d816d423 KDW |
2219 | out_werr: |
2220 | ccw_device_set_offline(card->read.ccwdev); | |
2221 | out_err: | |
1da177e4 LT |
2222 | return -ENODEV; |
2223 | } | |
2224 | ||
2225 | /** | |
2226 | * lcs_shutdown_device, called when setting the group device offline. | |
2227 | */ | |
2228 | static int | |
27eb5ac8 | 2229 | __lcs_shutdown_device(struct ccwgroup_device *ccwgdev, int recovery_mode) |
1da177e4 LT |
2230 | { |
2231 | struct lcs_card *card; | |
2232 | enum lcs_dev_states recover_state; | |
e427babe | 2233 | int ret = 0, ret2 = 0, ret3 = 0; |
1da177e4 LT |
2234 | |
2235 | LCS_DBF_TEXT(3, setup, "shtdndev"); | |
dff59b64 | 2236 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2237 | if (!card) |
2238 | return -ENODEV; | |
27eb5ac8 KW |
2239 | if (recovery_mode == 0) { |
2240 | lcs_set_allowed_threads(card, 0); | |
2241 | if (lcs_wait_for_threads(card, LCS_SET_MC_THREAD)) | |
2242 | return -ERESTARTSYS; | |
2243 | } | |
1da177e4 LT |
2244 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); |
2245 | recover_state = card->state; | |
2246 | ||
2247 | ret = lcs_stop_device(card->dev); | |
e427babe KDW |
2248 | ret2 = ccw_device_set_offline(card->read.ccwdev); |
2249 | ret3 = ccw_device_set_offline(card->write.ccwdev); | |
2250 | if (!ret) | |
2251 | ret = (ret2) ? ret2 : ret3; | |
2252 | if (ret) | |
2253 | LCS_DBF_TEXT_(3, setup, "1err:%d", ret); | |
1da177e4 LT |
2254 | if (recover_state == DEV_STATE_UP) { |
2255 | card->state = DEV_STATE_RECOVER; | |
2256 | } | |
1da177e4 LT |
2257 | return 0; |
2258 | } | |
2259 | ||
27eb5ac8 KW |
2260 | static int |
2261 | lcs_shutdown_device(struct ccwgroup_device *ccwgdev) | |
2262 | { | |
2263 | return __lcs_shutdown_device(ccwgdev, 0); | |
2264 | } | |
2265 | ||
2266 | /** | |
2267 | * drive lcs recovery after startup and startlan initiated by Lan Gateway | |
2268 | */ | |
2269 | static int | |
2270 | lcs_recovery(void *ptr) | |
2271 | { | |
2272 | struct lcs_card *card; | |
2273 | struct ccwgroup_device *gdev; | |
2274 | int rc; | |
2275 | ||
2276 | card = (struct lcs_card *) ptr; | |
27eb5ac8 KW |
2277 | |
2278 | LCS_DBF_TEXT(4, trace, "recover1"); | |
2279 | if (!lcs_do_run_thread(card, LCS_RECOVERY_THREAD)) | |
2280 | return 0; | |
2281 | LCS_DBF_TEXT(4, trace, "recover2"); | |
2282 | gdev = card->gdev; | |
c99fc5da KW |
2283 | dev_warn(&gdev->dev, |
2284 | "A recovery process has been started for the LCS device\n"); | |
27eb5ac8 KW |
2285 | rc = __lcs_shutdown_device(gdev, 1); |
2286 | rc = lcs_new_device(gdev); | |
2287 | if (!rc) | |
c99fc5da KW |
2288 | pr_info("Device %s successfully recovered!\n", |
2289 | card->dev->name); | |
27eb5ac8 | 2290 | else |
c99fc5da KW |
2291 | pr_info("Device %s could not be recovered!\n", |
2292 | card->dev->name); | |
27eb5ac8 KW |
2293 | lcs_clear_thread_running_bit(card, LCS_RECOVERY_THREAD); |
2294 | return 0; | |
2295 | } | |
2296 | ||
1da177e4 LT |
2297 | /** |
2298 | * lcs_remove_device, free buffers and card | |
2299 | */ | |
2300 | static void | |
2301 | lcs_remove_device(struct ccwgroup_device *ccwgdev) | |
2302 | { | |
2303 | struct lcs_card *card; | |
2304 | ||
dff59b64 | 2305 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2306 | if (!card) |
2307 | return; | |
2308 | ||
1da177e4 LT |
2309 | LCS_DBF_TEXT(3, setup, "remdev"); |
2310 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2311 | if (ccwgdev->state == CCWGROUP_ONLINE) { | |
2312 | lcs_shutdown_device(ccwgdev); | |
2313 | } | |
2314 | if (card->dev) | |
2315 | unregister_netdev(card->dev); | |
1da177e4 LT |
2316 | lcs_cleanup_card(card); |
2317 | lcs_free_card(card); | |
00d5bdd1 | 2318 | dev_set_drvdata(&ccwgdev->dev, NULL); |
1da177e4 LT |
2319 | put_device(&ccwgdev->dev); |
2320 | } | |
2321 | ||
cbb2aec3 KDW |
2322 | static int lcs_pm_suspend(struct lcs_card *card) |
2323 | { | |
2324 | if (card->dev) | |
2325 | netif_device_detach(card->dev); | |
2326 | lcs_set_allowed_threads(card, 0); | |
2327 | lcs_wait_for_threads(card, 0xffffffff); | |
2328 | if (card->state != DEV_STATE_DOWN) | |
2329 | __lcs_shutdown_device(card->gdev, 1); | |
2330 | return 0; | |
2331 | } | |
2332 | ||
2333 | static int lcs_pm_resume(struct lcs_card *card) | |
2334 | { | |
2335 | int rc = 0; | |
2336 | ||
2337 | if (card->state == DEV_STATE_RECOVER) | |
2338 | rc = lcs_new_device(card->gdev); | |
2339 | if (card->dev) | |
2340 | netif_device_attach(card->dev); | |
2341 | if (rc) { | |
2342 | dev_warn(&card->gdev->dev, "The lcs device driver " | |
2343 | "failed to recover the device\n"); | |
2344 | } | |
2345 | return rc; | |
2346 | } | |
2347 | ||
2348 | static int lcs_prepare(struct ccwgroup_device *gdev) | |
2349 | { | |
2350 | return 0; | |
2351 | } | |
2352 | ||
2353 | static void lcs_complete(struct ccwgroup_device *gdev) | |
2354 | { | |
2355 | return; | |
2356 | } | |
2357 | ||
2358 | static int lcs_freeze(struct ccwgroup_device *gdev) | |
2359 | { | |
2360 | struct lcs_card *card = dev_get_drvdata(&gdev->dev); | |
2361 | return lcs_pm_suspend(card); | |
2362 | } | |
2363 | ||
2364 | static int lcs_thaw(struct ccwgroup_device *gdev) | |
2365 | { | |
2366 | struct lcs_card *card = dev_get_drvdata(&gdev->dev); | |
2367 | return lcs_pm_resume(card); | |
2368 | } | |
2369 | ||
2370 | static int lcs_restore(struct ccwgroup_device *gdev) | |
2371 | { | |
2372 | struct lcs_card *card = dev_get_drvdata(&gdev->dev); | |
2373 | return lcs_pm_resume(card); | |
2374 | } | |
2375 | ||
0ca8cc6f UB |
2376 | static struct ccw_device_id lcs_ids[] = { |
2377 | {CCW_DEVICE(0x3088, 0x08), .driver_info = lcs_channel_type_parallel}, | |
2378 | {CCW_DEVICE(0x3088, 0x1f), .driver_info = lcs_channel_type_2216}, | |
2379 | {CCW_DEVICE(0x3088, 0x60), .driver_info = lcs_channel_type_osa2}, | |
2380 | {}, | |
2381 | }; | |
2382 | MODULE_DEVICE_TABLE(ccw, lcs_ids); | |
2383 | ||
2384 | static struct ccw_driver lcs_ccw_driver = { | |
3bda058b SO |
2385 | .driver = { |
2386 | .owner = THIS_MODULE, | |
2387 | .name = "lcs", | |
2388 | }, | |
0ca8cc6f UB |
2389 | .ids = lcs_ids, |
2390 | .probe = ccwgroup_probe_ccwdev, | |
2391 | .remove = ccwgroup_remove_ccwdev, | |
420f42ec | 2392 | .int_class = IRQIO_LCS, |
0ca8cc6f UB |
2393 | }; |
2394 | ||
1da177e4 LT |
2395 | /** |
2396 | * LCS ccwgroup driver registration | |
2397 | */ | |
2398 | static struct ccwgroup_driver lcs_group_driver = { | |
3c190c51 SO |
2399 | .driver = { |
2400 | .owner = THIS_MODULE, | |
2401 | .name = "lcs", | |
2402 | }, | |
00d5bdd1 | 2403 | .setup = lcs_probe_device, |
1da177e4 LT |
2404 | .remove = lcs_remove_device, |
2405 | .set_online = lcs_new_device, | |
2406 | .set_offline = lcs_shutdown_device, | |
cbb2aec3 KDW |
2407 | .prepare = lcs_prepare, |
2408 | .complete = lcs_complete, | |
2409 | .freeze = lcs_freeze, | |
2410 | .thaw = lcs_thaw, | |
2411 | .restore = lcs_restore, | |
1da177e4 LT |
2412 | }; |
2413 | ||
00d5bdd1 SO |
2414 | static ssize_t lcs_driver_group_store(struct device_driver *ddrv, |
2415 | const char *buf, size_t count) | |
0ca8cc6f UB |
2416 | { |
2417 | int err; | |
9814fdfb | 2418 | err = ccwgroup_create_dev(lcs_root_dev, &lcs_group_driver, 2, buf); |
0ca8cc6f UB |
2419 | return err ? err : count; |
2420 | } | |
0ca8cc6f UB |
2421 | static DRIVER_ATTR(group, 0200, NULL, lcs_driver_group_store); |
2422 | ||
9d2aa0aa | 2423 | static struct attribute *lcs_drv_attrs[] = { |
0ca8cc6f UB |
2424 | &driver_attr_group.attr, |
2425 | NULL, | |
2426 | }; | |
9d2aa0aa SO |
2427 | static struct attribute_group lcs_drv_attr_group = { |
2428 | .attrs = lcs_drv_attrs, | |
0ca8cc6f | 2429 | }; |
9d2aa0aa SO |
2430 | static const struct attribute_group *lcs_drv_attr_groups[] = { |
2431 | &lcs_drv_attr_group, | |
0ca8cc6f UB |
2432 | NULL, |
2433 | }; | |
2434 | ||
1da177e4 LT |
2435 | /** |
2436 | * LCS Module/Kernel initialization function | |
2437 | */ | |
2438 | static int | |
2439 | __init lcs_init_module(void) | |
2440 | { | |
2441 | int rc; | |
2442 | ||
c99fc5da | 2443 | pr_info("Loading %s\n", version); |
1da177e4 LT |
2444 | rc = lcs_register_debug_facility(); |
2445 | LCS_DBF_TEXT(0, setup, "lcsinit"); | |
0ca8cc6f UB |
2446 | if (rc) |
2447 | goto out_err; | |
2448 | lcs_root_dev = root_device_register("lcs"); | |
6274edc5 | 2449 | rc = PTR_ERR_OR_ZERO(lcs_root_dev); |
0ca8cc6f UB |
2450 | if (rc) |
2451 | goto register_err; | |
2452 | rc = ccw_driver_register(&lcs_ccw_driver); | |
2453 | if (rc) | |
2454 | goto ccw_err; | |
9d2aa0aa | 2455 | lcs_group_driver.driver.groups = lcs_drv_attr_groups; |
0ca8cc6f UB |
2456 | rc = ccwgroup_driver_register(&lcs_group_driver); |
2457 | if (rc) | |
2458 | goto ccwgroup_err; | |
1da177e4 | 2459 | return 0; |
0ca8cc6f UB |
2460 | |
2461 | ccwgroup_err: | |
2462 | ccw_driver_unregister(&lcs_ccw_driver); | |
2463 | ccw_err: | |
2464 | root_device_unregister(lcs_root_dev); | |
2465 | register_err: | |
2466 | lcs_unregister_debug_facility(); | |
2467 | out_err: | |
2468 | pr_err("Initializing the lcs device driver failed\n"); | |
2469 | return rc; | |
1da177e4 LT |
2470 | } |
2471 | ||
2472 | ||
2473 | /** | |
2474 | * LCS module cleanup function | |
2475 | */ | |
2476 | static void | |
2477 | __exit lcs_cleanup_module(void) | |
2478 | { | |
c99fc5da | 2479 | pr_info("Terminating lcs module.\n"); |
1da177e4 | 2480 | LCS_DBF_TEXT(0, trace, "cleanup"); |
0ca8cc6f UB |
2481 | ccwgroup_driver_unregister(&lcs_group_driver); |
2482 | ccw_driver_unregister(&lcs_ccw_driver); | |
2483 | root_device_unregister(lcs_root_dev); | |
1da177e4 LT |
2484 | lcs_unregister_debug_facility(); |
2485 | } | |
2486 | ||
2487 | module_init(lcs_init_module); | |
2488 | module_exit(lcs_cleanup_module); | |
2489 | ||
1387780f | 2490 | MODULE_AUTHOR("Frank Pavlic <fpavlic@de.ibm.com>"); |
1da177e4 LT |
2491 | MODULE_LICENSE("GPL"); |
2492 |