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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 | ||
096a6168 | 29 | #include <linux/kernel_stat.h> |
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/if.h> | |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/etherdevice.h> | |
34 | #include <linux/trdevice.h> | |
35 | #include <linux/fddidevice.h> | |
36 | #include <linux/inetdevice.h> | |
37 | #include <linux/in.h> | |
38 | #include <linux/igmp.h> | |
39 | #include <linux/delay.h> | |
e5b5719b | 40 | #include <linux/kthread.h> |
5a0e3ad6 | 41 | #include <linux/slab.h> |
1da177e4 LT |
42 | #include <net/arp.h> |
43 | #include <net/ip.h> | |
44 | ||
45 | #include <asm/debug.h> | |
46 | #include <asm/idals.h> | |
47 | #include <asm/timex.h> | |
48 | #include <linux/device.h> | |
49 | #include <asm/ccwgroup.h> | |
50 | ||
51 | #include "lcs.h" | |
1da177e4 LT |
52 | |
53 | ||
54 | #if !defined(CONFIG_NET_ETHERNET) && \ | |
55 | !defined(CONFIG_TR) && !defined(CONFIG_FDDI) | |
56 | #error Cannot compile lcs.c without some net devices switched on. | |
57 | #endif | |
58 | ||
59 | /** | |
60 | * initialization string for output | |
61 | */ | |
1da177e4 | 62 | |
e018ba1f | 63 | static char version[] __initdata = "LCS driver"; |
0ca8cc6f UB |
64 | |
65 | /** | |
66 | * the root device for lcs group devices | |
67 | */ | |
68 | static struct device *lcs_root_dev; | |
1da177e4 LT |
69 | |
70 | /** | |
71 | * Some prototypes. | |
72 | */ | |
73 | static void lcs_tasklet(unsigned long); | |
4927b3f7 | 74 | static void lcs_start_kernel_thread(struct work_struct *); |
1da177e4 | 75 | static void lcs_get_frames_cb(struct lcs_channel *, struct lcs_buffer *); |
801599b0 | 76 | #ifdef CONFIG_IP_MULTICAST |
1da177e4 | 77 | static int lcs_send_delipm(struct lcs_card *, struct lcs_ipm_list *); |
801599b0 | 78 | #endif /* CONFIG_IP_MULTICAST */ |
27eb5ac8 | 79 | static int lcs_recovery(void *ptr); |
1da177e4 LT |
80 | |
81 | /** | |
82 | * Debug Facility Stuff | |
83 | */ | |
0ca8cc6f | 84 | static char debug_buffer[255]; |
1da177e4 LT |
85 | static debug_info_t *lcs_dbf_setup; |
86 | static debug_info_t *lcs_dbf_trace; | |
87 | ||
88 | /** | |
89 | * LCS Debug Facility functions | |
90 | */ | |
91 | static void | |
92 | lcs_unregister_debug_facility(void) | |
93 | { | |
94 | if (lcs_dbf_setup) | |
95 | debug_unregister(lcs_dbf_setup); | |
96 | if (lcs_dbf_trace) | |
97 | debug_unregister(lcs_dbf_trace); | |
98 | } | |
99 | ||
100 | static int | |
101 | lcs_register_debug_facility(void) | |
102 | { | |
66a464db | 103 | lcs_dbf_setup = debug_register("lcs_setup", 2, 1, 8); |
164b0fb1 | 104 | lcs_dbf_trace = debug_register("lcs_trace", 4, 1, 8); |
1da177e4 | 105 | if (lcs_dbf_setup == NULL || lcs_dbf_trace == NULL) { |
c99fc5da | 106 | pr_err("Not enough memory for debug facility.\n"); |
1da177e4 LT |
107 | lcs_unregister_debug_facility(); |
108 | return -ENOMEM; | |
109 | } | |
110 | debug_register_view(lcs_dbf_setup, &debug_hex_ascii_view); | |
0d613a27 | 111 | debug_set_level(lcs_dbf_setup, 2); |
1da177e4 | 112 | debug_register_view(lcs_dbf_trace, &debug_hex_ascii_view); |
0d613a27 | 113 | debug_set_level(lcs_dbf_trace, 2); |
1da177e4 LT |
114 | return 0; |
115 | } | |
116 | ||
117 | /** | |
118 | * Allocate io buffers. | |
119 | */ | |
120 | static int | |
121 | lcs_alloc_channel(struct lcs_channel *channel) | |
122 | { | |
123 | int cnt; | |
124 | ||
125 | LCS_DBF_TEXT(2, setup, "ichalloc"); | |
126 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
127 | /* alloc memory fo iobuffer */ | |
88abaab4 ES |
128 | channel->iob[cnt].data = |
129 | kzalloc(LCS_IOBUFFERSIZE, GFP_DMA | GFP_KERNEL); | |
1da177e4 LT |
130 | if (channel->iob[cnt].data == NULL) |
131 | break; | |
9163bb2e | 132 | channel->iob[cnt].state = LCS_BUF_STATE_EMPTY; |
1da177e4 LT |
133 | } |
134 | if (cnt < LCS_NUM_BUFFS) { | |
135 | /* Not all io buffers could be allocated. */ | |
136 | LCS_DBF_TEXT(2, setup, "echalloc"); | |
137 | while (cnt-- > 0) | |
138 | kfree(channel->iob[cnt].data); | |
139 | return -ENOMEM; | |
140 | } | |
141 | return 0; | |
142 | } | |
143 | ||
144 | /** | |
145 | * Free io buffers. | |
146 | */ | |
147 | static void | |
148 | lcs_free_channel(struct lcs_channel *channel) | |
149 | { | |
150 | int cnt; | |
151 | ||
152 | LCS_DBF_TEXT(2, setup, "ichfree"); | |
153 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
17fd682e | 154 | kfree(channel->iob[cnt].data); |
1da177e4 LT |
155 | channel->iob[cnt].data = NULL; |
156 | } | |
157 | } | |
158 | ||
159 | /* | |
160 | * Cleanup channel. | |
161 | */ | |
162 | static void | |
163 | lcs_cleanup_channel(struct lcs_channel *channel) | |
164 | { | |
165 | LCS_DBF_TEXT(3, setup, "cleanch"); | |
166 | /* Kill write channel tasklets. */ | |
167 | tasklet_kill(&channel->irq_tasklet); | |
168 | /* Free channel buffers. */ | |
169 | lcs_free_channel(channel); | |
170 | } | |
171 | ||
172 | /** | |
173 | * LCS free memory for card and channels. | |
174 | */ | |
175 | static void | |
176 | lcs_free_card(struct lcs_card *card) | |
177 | { | |
178 | LCS_DBF_TEXT(2, setup, "remcard"); | |
179 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
180 | kfree(card); | |
181 | } | |
182 | ||
183 | /** | |
184 | * LCS alloc memory for card and channels | |
185 | */ | |
186 | static struct lcs_card * | |
187 | lcs_alloc_card(void) | |
188 | { | |
189 | struct lcs_card *card; | |
190 | int rc; | |
191 | ||
192 | LCS_DBF_TEXT(2, setup, "alloclcs"); | |
193 | ||
88abaab4 | 194 | card = kzalloc(sizeof(struct lcs_card), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
195 | if (card == NULL) |
196 | return NULL; | |
1da177e4 LT |
197 | card->lan_type = LCS_FRAME_TYPE_AUTO; |
198 | card->pkt_seq = 0; | |
199 | card->lancmd_timeout = LCS_LANCMD_TIMEOUT_DEFAULT; | |
200 | /* Allocate io buffers for the read channel. */ | |
201 | rc = lcs_alloc_channel(&card->read); | |
202 | if (rc){ | |
203 | LCS_DBF_TEXT(2, setup, "iccwerr"); | |
204 | lcs_free_card(card); | |
205 | return NULL; | |
206 | } | |
207 | /* Allocate io buffers for the write channel. */ | |
208 | rc = lcs_alloc_channel(&card->write); | |
209 | if (rc) { | |
210 | LCS_DBF_TEXT(2, setup, "iccwerr"); | |
211 | lcs_cleanup_channel(&card->read); | |
212 | lcs_free_card(card); | |
213 | return NULL; | |
214 | } | |
215 | ||
216 | #ifdef CONFIG_IP_MULTICAST | |
217 | INIT_LIST_HEAD(&card->ipm_list); | |
218 | #endif | |
219 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
220 | return card; | |
221 | } | |
222 | ||
223 | /* | |
224 | * Setup read channel. | |
225 | */ | |
226 | static void | |
227 | lcs_setup_read_ccws(struct lcs_card *card) | |
228 | { | |
229 | int cnt; | |
230 | ||
231 | LCS_DBF_TEXT(2, setup, "ireadccw"); | |
232 | /* Setup read ccws. */ | |
233 | memset(card->read.ccws, 0, sizeof (struct ccw1) * (LCS_NUM_BUFFS + 1)); | |
234 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
235 | card->read.ccws[cnt].cmd_code = LCS_CCW_READ; | |
236 | card->read.ccws[cnt].count = LCS_IOBUFFERSIZE; | |
237 | card->read.ccws[cnt].flags = | |
238 | CCW_FLAG_CC | CCW_FLAG_SLI | CCW_FLAG_PCI; | |
239 | /* | |
240 | * Note: we have allocated the buffer with GFP_DMA, so | |
241 | * we do not need to do set_normalized_cda. | |
242 | */ | |
243 | card->read.ccws[cnt].cda = | |
244 | (__u32) __pa(card->read.iob[cnt].data); | |
245 | ((struct lcs_header *) | |
246 | card->read.iob[cnt].data)->offset = LCS_ILLEGAL_OFFSET; | |
247 | card->read.iob[cnt].callback = lcs_get_frames_cb; | |
9163bb2e | 248 | card->read.iob[cnt].state = LCS_BUF_STATE_READY; |
1da177e4 LT |
249 | card->read.iob[cnt].count = LCS_IOBUFFERSIZE; |
250 | } | |
251 | card->read.ccws[0].flags &= ~CCW_FLAG_PCI; | |
252 | card->read.ccws[LCS_NUM_BUFFS - 1].flags &= ~CCW_FLAG_PCI; | |
253 | card->read.ccws[LCS_NUM_BUFFS - 1].flags |= CCW_FLAG_SUSPEND; | |
254 | /* Last ccw is a tic (transfer in channel). */ | |
255 | card->read.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER; | |
256 | card->read.ccws[LCS_NUM_BUFFS].cda = | |
257 | (__u32) __pa(card->read.ccws); | |
258 | /* Setg initial state of the read channel. */ | |
9163bb2e | 259 | card->read.state = LCS_CH_STATE_INIT; |
1da177e4 LT |
260 | |
261 | card->read.io_idx = 0; | |
262 | card->read.buf_idx = 0; | |
263 | } | |
264 | ||
265 | static void | |
266 | lcs_setup_read(struct lcs_card *card) | |
267 | { | |
268 | LCS_DBF_TEXT(3, setup, "initread"); | |
269 | ||
270 | lcs_setup_read_ccws(card); | |
271 | /* Initialize read channel tasklet. */ | |
272 | card->read.irq_tasklet.data = (unsigned long) &card->read; | |
273 | card->read.irq_tasklet.func = lcs_tasklet; | |
274 | /* Initialize waitqueue. */ | |
275 | init_waitqueue_head(&card->read.wait_q); | |
276 | } | |
277 | ||
278 | /* | |
279 | * Setup write channel. | |
280 | */ | |
281 | static void | |
282 | lcs_setup_write_ccws(struct lcs_card *card) | |
283 | { | |
284 | int cnt; | |
285 | ||
286 | LCS_DBF_TEXT(3, setup, "iwritccw"); | |
287 | /* Setup write ccws. */ | |
288 | memset(card->write.ccws, 0, sizeof(struct ccw1) * LCS_NUM_BUFFS + 1); | |
289 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
290 | card->write.ccws[cnt].cmd_code = LCS_CCW_WRITE; | |
291 | card->write.ccws[cnt].count = 0; | |
292 | card->write.ccws[cnt].flags = | |
293 | CCW_FLAG_SUSPEND | CCW_FLAG_CC | CCW_FLAG_SLI; | |
294 | /* | |
295 | * Note: we have allocated the buffer with GFP_DMA, so | |
296 | * we do not need to do set_normalized_cda. | |
297 | */ | |
298 | card->write.ccws[cnt].cda = | |
299 | (__u32) __pa(card->write.iob[cnt].data); | |
300 | } | |
301 | /* Last ccw is a tic (transfer in channel). */ | |
302 | card->write.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER; | |
303 | card->write.ccws[LCS_NUM_BUFFS].cda = | |
304 | (__u32) __pa(card->write.ccws); | |
305 | /* Set initial state of the write channel. */ | |
9163bb2e | 306 | card->read.state = LCS_CH_STATE_INIT; |
1da177e4 LT |
307 | |
308 | card->write.io_idx = 0; | |
309 | card->write.buf_idx = 0; | |
310 | } | |
311 | ||
312 | static void | |
313 | lcs_setup_write(struct lcs_card *card) | |
314 | { | |
315 | LCS_DBF_TEXT(3, setup, "initwrit"); | |
316 | ||
317 | lcs_setup_write_ccws(card); | |
318 | /* Initialize write channel tasklet. */ | |
319 | card->write.irq_tasklet.data = (unsigned long) &card->write; | |
320 | card->write.irq_tasklet.func = lcs_tasklet; | |
321 | /* Initialize waitqueue. */ | |
322 | init_waitqueue_head(&card->write.wait_q); | |
323 | } | |
324 | ||
325 | static void | |
326 | lcs_set_allowed_threads(struct lcs_card *card, unsigned long threads) | |
327 | { | |
328 | unsigned long flags; | |
329 | ||
330 | spin_lock_irqsave(&card->mask_lock, flags); | |
331 | card->thread_allowed_mask = threads; | |
332 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
333 | wake_up(&card->wait_q); | |
334 | } | |
335 | static inline int | |
336 | lcs_threads_running(struct lcs_card *card, unsigned long threads) | |
337 | { | |
338 | unsigned long flags; | |
339 | int rc = 0; | |
340 | ||
341 | spin_lock_irqsave(&card->mask_lock, flags); | |
342 | rc = (card->thread_running_mask & threads); | |
343 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
344 | return rc; | |
345 | } | |
346 | ||
347 | static int | |
348 | lcs_wait_for_threads(struct lcs_card *card, unsigned long threads) | |
349 | { | |
350 | return wait_event_interruptible(card->wait_q, | |
351 | lcs_threads_running(card, threads) == 0); | |
352 | } | |
353 | ||
354 | static inline int | |
355 | lcs_set_thread_start_bit(struct lcs_card *card, unsigned long thread) | |
356 | { | |
357 | unsigned long flags; | |
358 | ||
359 | spin_lock_irqsave(&card->mask_lock, flags); | |
360 | if ( !(card->thread_allowed_mask & thread) || | |
361 | (card->thread_start_mask & thread) ) { | |
362 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
363 | return -EPERM; | |
364 | } | |
365 | card->thread_start_mask |= thread; | |
366 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
367 | return 0; | |
368 | } | |
369 | ||
370 | static void | |
371 | lcs_clear_thread_running_bit(struct lcs_card *card, unsigned long thread) | |
372 | { | |
373 | unsigned long flags; | |
374 | ||
375 | spin_lock_irqsave(&card->mask_lock, flags); | |
376 | card->thread_running_mask &= ~thread; | |
377 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
378 | wake_up(&card->wait_q); | |
379 | } | |
380 | ||
381 | static inline int | |
382 | __lcs_do_run_thread(struct lcs_card *card, unsigned long thread) | |
383 | { | |
384 | unsigned long flags; | |
385 | int rc = 0; | |
386 | ||
387 | spin_lock_irqsave(&card->mask_lock, flags); | |
388 | if (card->thread_start_mask & thread){ | |
389 | if ((card->thread_allowed_mask & thread) && | |
390 | !(card->thread_running_mask & thread)){ | |
391 | rc = 1; | |
392 | card->thread_start_mask &= ~thread; | |
393 | card->thread_running_mask |= thread; | |
394 | } else | |
395 | rc = -EPERM; | |
396 | } | |
397 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
398 | return rc; | |
399 | } | |
400 | ||
401 | static int | |
402 | lcs_do_run_thread(struct lcs_card *card, unsigned long thread) | |
403 | { | |
404 | int rc = 0; | |
405 | wait_event(card->wait_q, | |
406 | (rc = __lcs_do_run_thread(card, thread)) >= 0); | |
407 | return rc; | |
408 | } | |
409 | ||
410 | static int | |
411 | lcs_do_start_thread(struct lcs_card *card, unsigned long thread) | |
412 | { | |
413 | unsigned long flags; | |
414 | int rc = 0; | |
415 | ||
416 | spin_lock_irqsave(&card->mask_lock, flags); | |
417 | LCS_DBF_TEXT_(4, trace, " %02x%02x%02x", | |
418 | (u8) card->thread_start_mask, | |
419 | (u8) card->thread_allowed_mask, | |
420 | (u8) card->thread_running_mask); | |
421 | rc = (card->thread_start_mask & thread); | |
422 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
423 | return rc; | |
424 | } | |
425 | ||
426 | /** | |
427 | * Initialize channels,card and state machines. | |
428 | */ | |
429 | static void | |
430 | lcs_setup_card(struct lcs_card *card) | |
431 | { | |
432 | LCS_DBF_TEXT(2, setup, "initcard"); | |
433 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
434 | ||
435 | lcs_setup_read(card); | |
436 | lcs_setup_write(card); | |
437 | /* Set cards initial state. */ | |
438 | card->state = DEV_STATE_DOWN; | |
439 | card->tx_buffer = NULL; | |
440 | card->tx_emitted = 0; | |
441 | ||
1da177e4 LT |
442 | init_waitqueue_head(&card->wait_q); |
443 | spin_lock_init(&card->lock); | |
444 | spin_lock_init(&card->ipm_lock); | |
445 | spin_lock_init(&card->mask_lock); | |
446 | #ifdef CONFIG_IP_MULTICAST | |
447 | INIT_LIST_HEAD(&card->ipm_list); | |
448 | #endif | |
449 | INIT_LIST_HEAD(&card->lancmd_waiters); | |
450 | } | |
451 | ||
452 | static inline void | |
453 | lcs_clear_multicast_list(struct lcs_card *card) | |
454 | { | |
455 | #ifdef CONFIG_IP_MULTICAST | |
456 | struct lcs_ipm_list *ipm; | |
457 | unsigned long flags; | |
458 | ||
459 | /* Free multicast list. */ | |
460 | LCS_DBF_TEXT(3, setup, "clmclist"); | |
461 | spin_lock_irqsave(&card->ipm_lock, flags); | |
462 | while (!list_empty(&card->ipm_list)){ | |
463 | ipm = list_entry(card->ipm_list.next, | |
464 | struct lcs_ipm_list, list); | |
465 | list_del(&ipm->list); | |
466 | if (ipm->ipm_state != LCS_IPM_STATE_SET_REQUIRED){ | |
467 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
468 | lcs_send_delipm(card, ipm); | |
469 | spin_lock_irqsave(&card->ipm_lock, flags); | |
470 | } | |
471 | kfree(ipm); | |
472 | } | |
473 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
474 | #endif | |
475 | } | |
476 | /** | |
477 | * Cleanup channels,card and state machines. | |
478 | */ | |
479 | static void | |
480 | lcs_cleanup_card(struct lcs_card *card) | |
481 | { | |
482 | ||
483 | LCS_DBF_TEXT(3, setup, "cleancrd"); | |
484 | LCS_DBF_HEX(2,setup,&card,sizeof(void*)); | |
485 | ||
486 | if (card->dev != NULL) | |
487 | free_netdev(card->dev); | |
488 | /* Cleanup channels. */ | |
489 | lcs_cleanup_channel(&card->write); | |
490 | lcs_cleanup_channel(&card->read); | |
491 | } | |
492 | ||
493 | /** | |
494 | * Start channel. | |
495 | */ | |
496 | static int | |
497 | lcs_start_channel(struct lcs_channel *channel) | |
498 | { | |
499 | unsigned long flags; | |
500 | int rc; | |
501 | ||
2a0217d5 | 502 | LCS_DBF_TEXT_(4, trace,"ssch%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
503 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
504 | rc = ccw_device_start(channel->ccwdev, | |
505 | channel->ccws + channel->io_idx, 0, 0, | |
506 | DOIO_DENY_PREFETCH | DOIO_ALLOW_SUSPEND); | |
507 | if (rc == 0) | |
9163bb2e | 508 | channel->state = LCS_CH_STATE_RUNNING; |
1da177e4 LT |
509 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); |
510 | if (rc) { | |
2a0217d5 KS |
511 | LCS_DBF_TEXT_(4,trace,"essh%s", |
512 | dev_name(&channel->ccwdev->dev)); | |
c99fc5da KW |
513 | dev_err(&channel->ccwdev->dev, |
514 | "Starting an LCS device resulted in an error," | |
515 | " rc=%d!\n", rc); | |
1da177e4 LT |
516 | } |
517 | return rc; | |
518 | } | |
519 | ||
520 | static int | |
521 | lcs_clear_channel(struct lcs_channel *channel) | |
522 | { | |
523 | unsigned long flags; | |
524 | int rc; | |
525 | ||
526 | LCS_DBF_TEXT(4,trace,"clearch"); | |
2a0217d5 | 527 | LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
528 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
529 | rc = ccw_device_clear(channel->ccwdev, (addr_t) channel); | |
530 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
531 | if (rc) { | |
2a0217d5 KS |
532 | LCS_DBF_TEXT_(4, trace, "ecsc%s", |
533 | dev_name(&channel->ccwdev->dev)); | |
1da177e4 LT |
534 | return rc; |
535 | } | |
9163bb2e UB |
536 | wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_CLEARED)); |
537 | channel->state = LCS_CH_STATE_STOPPED; | |
1da177e4 LT |
538 | return rc; |
539 | } | |
540 | ||
541 | ||
542 | /** | |
543 | * Stop channel. | |
544 | */ | |
545 | static int | |
546 | lcs_stop_channel(struct lcs_channel *channel) | |
547 | { | |
548 | unsigned long flags; | |
549 | int rc; | |
550 | ||
9163bb2e | 551 | if (channel->state == LCS_CH_STATE_STOPPED) |
1da177e4 LT |
552 | return 0; |
553 | LCS_DBF_TEXT(4,trace,"haltsch"); | |
2a0217d5 | 554 | LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev)); |
9163bb2e | 555 | channel->state = LCS_CH_STATE_INIT; |
1da177e4 LT |
556 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
557 | rc = ccw_device_halt(channel->ccwdev, (addr_t) channel); | |
558 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
559 | if (rc) { | |
2a0217d5 KS |
560 | LCS_DBF_TEXT_(4, trace, "ehsc%s", |
561 | dev_name(&channel->ccwdev->dev)); | |
1da177e4 LT |
562 | return rc; |
563 | } | |
564 | /* Asynchronous halt initialted. Wait for its completion. */ | |
9163bb2e | 565 | wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_HALTED)); |
1da177e4 LT |
566 | lcs_clear_channel(channel); |
567 | return 0; | |
568 | } | |
569 | ||
570 | /** | |
571 | * start read and write channel | |
572 | */ | |
573 | static int | |
574 | lcs_start_channels(struct lcs_card *card) | |
575 | { | |
576 | int rc; | |
577 | ||
578 | LCS_DBF_TEXT(2, trace, "chstart"); | |
579 | /* start read channel */ | |
580 | rc = lcs_start_channel(&card->read); | |
581 | if (rc) | |
582 | return rc; | |
583 | /* start write channel */ | |
584 | rc = lcs_start_channel(&card->write); | |
585 | if (rc) | |
586 | lcs_stop_channel(&card->read); | |
587 | return rc; | |
588 | } | |
589 | ||
590 | /** | |
591 | * stop read and write channel | |
592 | */ | |
593 | static int | |
594 | lcs_stop_channels(struct lcs_card *card) | |
595 | { | |
596 | LCS_DBF_TEXT(2, trace, "chhalt"); | |
597 | lcs_stop_channel(&card->read); | |
598 | lcs_stop_channel(&card->write); | |
599 | return 0; | |
600 | } | |
601 | ||
602 | /** | |
603 | * Get empty buffer. | |
604 | */ | |
605 | static struct lcs_buffer * | |
606 | __lcs_get_buffer(struct lcs_channel *channel) | |
607 | { | |
608 | int index; | |
609 | ||
610 | LCS_DBF_TEXT(5, trace, "_getbuff"); | |
611 | index = channel->io_idx; | |
612 | do { | |
9163bb2e UB |
613 | if (channel->iob[index].state == LCS_BUF_STATE_EMPTY) { |
614 | channel->iob[index].state = LCS_BUF_STATE_LOCKED; | |
1da177e4 LT |
615 | return channel->iob + index; |
616 | } | |
617 | index = (index + 1) & (LCS_NUM_BUFFS - 1); | |
618 | } while (index != channel->io_idx); | |
619 | return NULL; | |
620 | } | |
621 | ||
622 | static struct lcs_buffer * | |
623 | lcs_get_buffer(struct lcs_channel *channel) | |
624 | { | |
625 | struct lcs_buffer *buffer; | |
626 | unsigned long flags; | |
627 | ||
628 | LCS_DBF_TEXT(5, trace, "getbuff"); | |
629 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); | |
630 | buffer = __lcs_get_buffer(channel); | |
631 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
632 | return buffer; | |
633 | } | |
634 | ||
635 | /** | |
636 | * Resume channel program if the channel is suspended. | |
637 | */ | |
638 | static int | |
639 | __lcs_resume_channel(struct lcs_channel *channel) | |
640 | { | |
641 | int rc; | |
642 | ||
9163bb2e | 643 | if (channel->state != LCS_CH_STATE_SUSPENDED) |
1da177e4 LT |
644 | return 0; |
645 | if (channel->ccws[channel->io_idx].flags & CCW_FLAG_SUSPEND) | |
646 | return 0; | |
2a0217d5 | 647 | LCS_DBF_TEXT_(5, trace, "rsch%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
648 | rc = ccw_device_resume(channel->ccwdev); |
649 | if (rc) { | |
2a0217d5 KS |
650 | LCS_DBF_TEXT_(4, trace, "ersc%s", |
651 | dev_name(&channel->ccwdev->dev)); | |
c99fc5da KW |
652 | dev_err(&channel->ccwdev->dev, |
653 | "Sending data from the LCS device to the LAN failed" | |
654 | " with rc=%d\n",rc); | |
1da177e4 | 655 | } else |
9163bb2e | 656 | channel->state = LCS_CH_STATE_RUNNING; |
1da177e4 LT |
657 | return rc; |
658 | ||
659 | } | |
660 | ||
661 | /** | |
662 | * Make a buffer ready for processing. | |
663 | */ | |
664 | static inline void | |
665 | __lcs_ready_buffer_bits(struct lcs_channel *channel, int index) | |
666 | { | |
667 | int prev, next; | |
668 | ||
669 | LCS_DBF_TEXT(5, trace, "rdybits"); | |
670 | prev = (index - 1) & (LCS_NUM_BUFFS - 1); | |
671 | next = (index + 1) & (LCS_NUM_BUFFS - 1); | |
672 | /* Check if we may clear the suspend bit of this buffer. */ | |
673 | if (channel->ccws[next].flags & CCW_FLAG_SUSPEND) { | |
674 | /* Check if we have to set the PCI bit. */ | |
675 | if (!(channel->ccws[prev].flags & CCW_FLAG_SUSPEND)) | |
676 | /* Suspend bit of the previous buffer is not set. */ | |
677 | channel->ccws[index].flags |= CCW_FLAG_PCI; | |
678 | /* Suspend bit of the next buffer is set. */ | |
679 | channel->ccws[index].flags &= ~CCW_FLAG_SUSPEND; | |
680 | } | |
681 | } | |
682 | ||
683 | static int | |
684 | lcs_ready_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
685 | { | |
686 | unsigned long flags; | |
687 | int index, rc; | |
688 | ||
689 | LCS_DBF_TEXT(5, trace, "rdybuff"); | |
9163bb2e UB |
690 | BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED && |
691 | buffer->state != LCS_BUF_STATE_PROCESSED); | |
1da177e4 | 692 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
9163bb2e | 693 | buffer->state = LCS_BUF_STATE_READY; |
1da177e4 LT |
694 | index = buffer - channel->iob; |
695 | /* Set length. */ | |
696 | channel->ccws[index].count = buffer->count; | |
697 | /* Check relevant PCI/suspend bits. */ | |
698 | __lcs_ready_buffer_bits(channel, index); | |
699 | rc = __lcs_resume_channel(channel); | |
700 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
701 | return rc; | |
702 | } | |
703 | ||
704 | /** | |
705 | * Mark the buffer as processed. Take care of the suspend bit | |
706 | * of the previous buffer. This function is called from | |
707 | * interrupt context, so the lock must not be taken. | |
708 | */ | |
709 | static int | |
710 | __lcs_processed_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
711 | { | |
712 | int index, prev, next; | |
713 | ||
714 | LCS_DBF_TEXT(5, trace, "prcsbuff"); | |
9163bb2e UB |
715 | BUG_ON(buffer->state != LCS_BUF_STATE_READY); |
716 | buffer->state = LCS_BUF_STATE_PROCESSED; | |
1da177e4 LT |
717 | index = buffer - channel->iob; |
718 | prev = (index - 1) & (LCS_NUM_BUFFS - 1); | |
719 | next = (index + 1) & (LCS_NUM_BUFFS - 1); | |
720 | /* Set the suspend bit and clear the PCI bit of this buffer. */ | |
721 | channel->ccws[index].flags |= CCW_FLAG_SUSPEND; | |
722 | channel->ccws[index].flags &= ~CCW_FLAG_PCI; | |
723 | /* Check the suspend bit of the previous buffer. */ | |
9163bb2e | 724 | if (channel->iob[prev].state == LCS_BUF_STATE_READY) { |
1da177e4 LT |
725 | /* |
726 | * Previous buffer is in state ready. It might have | |
727 | * happened in lcs_ready_buffer that the suspend bit | |
728 | * has not been cleared to avoid an endless loop. | |
729 | * Do it now. | |
730 | */ | |
731 | __lcs_ready_buffer_bits(channel, prev); | |
732 | } | |
733 | /* Clear PCI bit of next buffer. */ | |
734 | channel->ccws[next].flags &= ~CCW_FLAG_PCI; | |
735 | return __lcs_resume_channel(channel); | |
736 | } | |
737 | ||
738 | /** | |
739 | * Put a processed buffer back to state empty. | |
740 | */ | |
741 | static void | |
742 | lcs_release_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
743 | { | |
744 | unsigned long flags; | |
745 | ||
746 | LCS_DBF_TEXT(5, trace, "relbuff"); | |
9163bb2e UB |
747 | BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED && |
748 | buffer->state != LCS_BUF_STATE_PROCESSED); | |
1da177e4 | 749 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
9163bb2e | 750 | buffer->state = LCS_BUF_STATE_EMPTY; |
1da177e4 LT |
751 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); |
752 | } | |
753 | ||
754 | /** | |
755 | * Get buffer for a lan command. | |
756 | */ | |
757 | static struct lcs_buffer * | |
758 | lcs_get_lancmd(struct lcs_card *card, int count) | |
759 | { | |
760 | struct lcs_buffer *buffer; | |
761 | struct lcs_cmd *cmd; | |
762 | ||
763 | LCS_DBF_TEXT(4, trace, "getlncmd"); | |
764 | /* Get buffer and wait if none is available. */ | |
765 | wait_event(card->write.wait_q, | |
766 | ((buffer = lcs_get_buffer(&card->write)) != NULL)); | |
767 | count += sizeof(struct lcs_header); | |
768 | *(__u16 *)(buffer->data + count) = 0; | |
769 | buffer->count = count + sizeof(__u16); | |
770 | buffer->callback = lcs_release_buffer; | |
771 | cmd = (struct lcs_cmd *) buffer->data; | |
772 | cmd->offset = count; | |
773 | cmd->type = LCS_FRAME_TYPE_CONTROL; | |
774 | cmd->slot = 0; | |
775 | return buffer; | |
776 | } | |
777 | ||
778 | ||
779 | static void | |
780 | lcs_get_reply(struct lcs_reply *reply) | |
781 | { | |
782 | WARN_ON(atomic_read(&reply->refcnt) <= 0); | |
783 | atomic_inc(&reply->refcnt); | |
784 | } | |
785 | ||
786 | static void | |
787 | lcs_put_reply(struct lcs_reply *reply) | |
788 | { | |
789 | WARN_ON(atomic_read(&reply->refcnt) <= 0); | |
790 | if (atomic_dec_and_test(&reply->refcnt)) { | |
791 | kfree(reply); | |
792 | } | |
793 | ||
794 | } | |
795 | ||
796 | static struct lcs_reply * | |
797 | lcs_alloc_reply(struct lcs_cmd *cmd) | |
798 | { | |
799 | struct lcs_reply *reply; | |
800 | ||
801 | LCS_DBF_TEXT(4, trace, "getreply"); | |
802 | ||
88abaab4 | 803 | reply = kzalloc(sizeof(struct lcs_reply), GFP_ATOMIC); |
1da177e4 LT |
804 | if (!reply) |
805 | return NULL; | |
1da177e4 LT |
806 | atomic_set(&reply->refcnt,1); |
807 | reply->sequence_no = cmd->sequence_no; | |
808 | reply->received = 0; | |
809 | reply->rc = 0; | |
810 | init_waitqueue_head(&reply->wait_q); | |
811 | ||
812 | return reply; | |
813 | } | |
814 | ||
815 | /** | |
816 | * Notifier function for lancmd replies. Called from read irq. | |
817 | */ | |
818 | static void | |
819 | lcs_notify_lancmd_waiters(struct lcs_card *card, struct lcs_cmd *cmd) | |
820 | { | |
821 | struct list_head *l, *n; | |
822 | struct lcs_reply *reply; | |
823 | ||
824 | LCS_DBF_TEXT(4, trace, "notiwait"); | |
825 | spin_lock(&card->lock); | |
826 | list_for_each_safe(l, n, &card->lancmd_waiters) { | |
827 | reply = list_entry(l, struct lcs_reply, list); | |
828 | if (reply->sequence_no == cmd->sequence_no) { | |
829 | lcs_get_reply(reply); | |
830 | list_del_init(&reply->list); | |
831 | if (reply->callback != NULL) | |
832 | reply->callback(card, cmd); | |
833 | reply->received = 1; | |
834 | reply->rc = cmd->return_code; | |
835 | wake_up(&reply->wait_q); | |
836 | lcs_put_reply(reply); | |
837 | break; | |
838 | } | |
839 | } | |
840 | spin_unlock(&card->lock); | |
841 | } | |
842 | ||
843 | /** | |
b595076a | 844 | * Emit buffer of a lan command. |
1da177e4 | 845 | */ |
2b67fc46 | 846 | static void |
1da177e4 LT |
847 | lcs_lancmd_timeout(unsigned long data) |
848 | { | |
849 | struct lcs_reply *reply, *list_reply, *r; | |
850 | unsigned long flags; | |
851 | ||
852 | LCS_DBF_TEXT(4, trace, "timeout"); | |
853 | reply = (struct lcs_reply *) data; | |
854 | spin_lock_irqsave(&reply->card->lock, flags); | |
855 | list_for_each_entry_safe(list_reply, r, | |
856 | &reply->card->lancmd_waiters,list) { | |
857 | if (reply == list_reply) { | |
858 | lcs_get_reply(reply); | |
859 | list_del_init(&reply->list); | |
860 | spin_unlock_irqrestore(&reply->card->lock, flags); | |
861 | reply->received = 1; | |
862 | reply->rc = -ETIME; | |
863 | wake_up(&reply->wait_q); | |
864 | lcs_put_reply(reply); | |
865 | return; | |
866 | } | |
867 | } | |
868 | spin_unlock_irqrestore(&reply->card->lock, flags); | |
869 | } | |
870 | ||
871 | static int | |
872 | lcs_send_lancmd(struct lcs_card *card, struct lcs_buffer *buffer, | |
873 | void (*reply_callback)(struct lcs_card *, struct lcs_cmd *)) | |
874 | { | |
875 | struct lcs_reply *reply; | |
876 | struct lcs_cmd *cmd; | |
877 | struct timer_list timer; | |
878 | unsigned long flags; | |
879 | int rc; | |
880 | ||
881 | LCS_DBF_TEXT(4, trace, "sendcmd"); | |
882 | cmd = (struct lcs_cmd *) buffer->data; | |
883 | cmd->return_code = 0; | |
884 | cmd->sequence_no = card->sequence_no++; | |
885 | reply = lcs_alloc_reply(cmd); | |
886 | if (!reply) | |
887 | return -ENOMEM; | |
888 | reply->callback = reply_callback; | |
889 | reply->card = card; | |
890 | spin_lock_irqsave(&card->lock, flags); | |
891 | list_add_tail(&reply->list, &card->lancmd_waiters); | |
892 | spin_unlock_irqrestore(&card->lock, flags); | |
893 | ||
894 | buffer->callback = lcs_release_buffer; | |
895 | rc = lcs_ready_buffer(&card->write, buffer); | |
896 | if (rc) | |
897 | return rc; | |
d62e09e3 | 898 | init_timer_on_stack(&timer); |
1da177e4 LT |
899 | timer.function = lcs_lancmd_timeout; |
900 | timer.data = (unsigned long) reply; | |
901 | timer.expires = jiffies + HZ*card->lancmd_timeout; | |
902 | add_timer(&timer); | |
903 | wait_event(reply->wait_q, reply->received); | |
904 | del_timer_sync(&timer); | |
905 | LCS_DBF_TEXT_(4, trace, "rc:%d",reply->rc); | |
906 | rc = reply->rc; | |
907 | lcs_put_reply(reply); | |
908 | return rc ? -EIO : 0; | |
909 | } | |
910 | ||
911 | /** | |
912 | * LCS startup command | |
913 | */ | |
914 | static int | |
915 | lcs_send_startup(struct lcs_card *card, __u8 initiator) | |
916 | { | |
917 | struct lcs_buffer *buffer; | |
918 | struct lcs_cmd *cmd; | |
919 | ||
920 | LCS_DBF_TEXT(2, trace, "startup"); | |
921 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
922 | cmd = (struct lcs_cmd *) buffer->data; | |
923 | cmd->cmd_code = LCS_CMD_STARTUP; | |
924 | cmd->initiator = initiator; | |
925 | cmd->cmd.lcs_startup.buff_size = LCS_IOBUFFERSIZE; | |
926 | return lcs_send_lancmd(card, buffer, NULL); | |
927 | } | |
928 | ||
929 | /** | |
930 | * LCS shutdown command | |
931 | */ | |
932 | static int | |
933 | lcs_send_shutdown(struct lcs_card *card) | |
934 | { | |
935 | struct lcs_buffer *buffer; | |
936 | struct lcs_cmd *cmd; | |
937 | ||
938 | LCS_DBF_TEXT(2, trace, "shutdown"); | |
939 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
940 | cmd = (struct lcs_cmd *) buffer->data; | |
941 | cmd->cmd_code = LCS_CMD_SHUTDOWN; | |
942 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
943 | return lcs_send_lancmd(card, buffer, NULL); | |
944 | } | |
945 | ||
946 | /** | |
947 | * LCS lanstat command | |
948 | */ | |
949 | static void | |
950 | __lcs_lanstat_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
951 | { | |
952 | LCS_DBF_TEXT(2, trace, "statcb"); | |
953 | memcpy(card->mac, cmd->cmd.lcs_lanstat_cmd.mac_addr, LCS_MAC_LENGTH); | |
954 | } | |
955 | ||
956 | static int | |
957 | lcs_send_lanstat(struct lcs_card *card) | |
958 | { | |
959 | struct lcs_buffer *buffer; | |
960 | struct lcs_cmd *cmd; | |
961 | ||
962 | LCS_DBF_TEXT(2,trace, "cmdstat"); | |
963 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
964 | cmd = (struct lcs_cmd *) buffer->data; | |
965 | /* Setup lanstat command. */ | |
966 | cmd->cmd_code = LCS_CMD_LANSTAT; | |
967 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
968 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
969 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
970 | return lcs_send_lancmd(card, buffer, __lcs_lanstat_cb); | |
971 | } | |
972 | ||
973 | /** | |
974 | * send stoplan command | |
975 | */ | |
976 | static int | |
977 | lcs_send_stoplan(struct lcs_card *card, __u8 initiator) | |
978 | { | |
979 | struct lcs_buffer *buffer; | |
980 | struct lcs_cmd *cmd; | |
981 | ||
982 | LCS_DBF_TEXT(2, trace, "cmdstpln"); | |
983 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
984 | cmd = (struct lcs_cmd *) buffer->data; | |
985 | cmd->cmd_code = LCS_CMD_STOPLAN; | |
986 | cmd->initiator = initiator; | |
987 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
988 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
989 | return lcs_send_lancmd(card, buffer, NULL); | |
990 | } | |
991 | ||
992 | /** | |
993 | * send startlan command | |
994 | */ | |
995 | static void | |
996 | __lcs_send_startlan_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
997 | { | |
998 | LCS_DBF_TEXT(2, trace, "srtlancb"); | |
999 | card->lan_type = cmd->cmd.lcs_std_cmd.lan_type; | |
1000 | card->portno = cmd->cmd.lcs_std_cmd.portno; | |
1001 | } | |
1002 | ||
1003 | static int | |
1004 | lcs_send_startlan(struct lcs_card *card, __u8 initiator) | |
1005 | { | |
1006 | struct lcs_buffer *buffer; | |
1007 | struct lcs_cmd *cmd; | |
1008 | ||
1009 | LCS_DBF_TEXT(2, trace, "cmdstaln"); | |
1010 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
1011 | cmd = (struct lcs_cmd *) buffer->data; | |
1012 | cmd->cmd_code = LCS_CMD_STARTLAN; | |
1013 | cmd->initiator = initiator; | |
1014 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
1015 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
1016 | return lcs_send_lancmd(card, buffer, __lcs_send_startlan_cb); | |
1017 | } | |
1018 | ||
1019 | #ifdef CONFIG_IP_MULTICAST | |
1020 | /** | |
1021 | * send setipm command (Multicast) | |
1022 | */ | |
1023 | static int | |
1024 | lcs_send_setipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list) | |
1025 | { | |
1026 | struct lcs_buffer *buffer; | |
1027 | struct lcs_cmd *cmd; | |
1028 | ||
1029 | LCS_DBF_TEXT(2, trace, "cmdsetim"); | |
1030 | buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE); | |
1031 | cmd = (struct lcs_cmd *) buffer->data; | |
1032 | cmd->cmd_code = LCS_CMD_SETIPM; | |
1033 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1034 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1035 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1036 | cmd->cmd.lcs_qipassist.version = 4; | |
1037 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1038 | memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair, | |
1039 | &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair)); | |
1040 | LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr); | |
1041 | return lcs_send_lancmd(card, buffer, NULL); | |
1042 | } | |
1043 | ||
1044 | /** | |
1045 | * send delipm command (Multicast) | |
1046 | */ | |
1047 | static int | |
1048 | lcs_send_delipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list) | |
1049 | { | |
1050 | struct lcs_buffer *buffer; | |
1051 | struct lcs_cmd *cmd; | |
1052 | ||
1053 | LCS_DBF_TEXT(2, trace, "cmddelim"); | |
1054 | buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE); | |
1055 | cmd = (struct lcs_cmd *) buffer->data; | |
1056 | cmd->cmd_code = LCS_CMD_DELIPM; | |
1057 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1058 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1059 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1060 | cmd->cmd.lcs_qipassist.version = 4; | |
1061 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1062 | memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair, | |
1063 | &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair)); | |
1064 | LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr); | |
1065 | return lcs_send_lancmd(card, buffer, NULL); | |
1066 | } | |
1067 | ||
1068 | /** | |
1069 | * check if multicast is supported by LCS | |
1070 | */ | |
1071 | static void | |
1072 | __lcs_check_multicast_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
1073 | { | |
1074 | LCS_DBF_TEXT(2, trace, "chkmccb"); | |
1075 | card->ip_assists_supported = | |
1076 | cmd->cmd.lcs_qipassist.ip_assists_supported; | |
1077 | card->ip_assists_enabled = | |
1078 | cmd->cmd.lcs_qipassist.ip_assists_enabled; | |
1079 | } | |
1080 | ||
1081 | static int | |
1082 | lcs_check_multicast_support(struct lcs_card *card) | |
1083 | { | |
1084 | struct lcs_buffer *buffer; | |
1085 | struct lcs_cmd *cmd; | |
1086 | int rc; | |
1087 | ||
1088 | LCS_DBF_TEXT(2, trace, "cmdqipa"); | |
1089 | /* Send query ipassist. */ | |
1090 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
1091 | cmd = (struct lcs_cmd *) buffer->data; | |
1092 | cmd->cmd_code = LCS_CMD_QIPASSIST; | |
1093 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1094 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1095 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1096 | cmd->cmd.lcs_qipassist.version = 4; | |
1097 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1098 | rc = lcs_send_lancmd(card, buffer, __lcs_check_multicast_cb); | |
1099 | if (rc != 0) { | |
c99fc5da | 1100 | pr_err("Query IPAssist failed. Assuming unsupported!\n"); |
1da177e4 LT |
1101 | return -EOPNOTSUPP; |
1102 | } | |
1da177e4 LT |
1103 | if (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) |
1104 | return 0; | |
1105 | return -EOPNOTSUPP; | |
1106 | } | |
1107 | ||
1108 | /** | |
1109 | * set or del multicast address on LCS card | |
1110 | */ | |
1111 | static void | |
1112 | lcs_fix_multicast_list(struct lcs_card *card) | |
1113 | { | |
1114 | struct list_head failed_list; | |
1115 | struct lcs_ipm_list *ipm, *tmp; | |
1116 | unsigned long flags; | |
1117 | int rc; | |
1118 | ||
1119 | LCS_DBF_TEXT(4,trace, "fixipm"); | |
1120 | INIT_LIST_HEAD(&failed_list); | |
1121 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1122 | list_modified: | |
1123 | list_for_each_entry_safe(ipm, tmp, &card->ipm_list, list){ | |
1124 | switch (ipm->ipm_state) { | |
1125 | case LCS_IPM_STATE_SET_REQUIRED: | |
1126 | /* del from ipm_list so noone else can tamper with | |
1127 | * this entry */ | |
1128 | list_del_init(&ipm->list); | |
1129 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1130 | rc = lcs_send_setipm(card, ipm); | |
1131 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1132 | if (rc) { | |
c99fc5da KW |
1133 | pr_info("Adding multicast address failed." |
1134 | " Table possibly full!\n"); | |
1da177e4 LT |
1135 | /* store ipm in failed list -> will be added |
1136 | * to ipm_list again, so a retry will be done | |
1137 | * during the next call of this function */ | |
1138 | list_add_tail(&ipm->list, &failed_list); | |
1139 | } else { | |
1140 | ipm->ipm_state = LCS_IPM_STATE_ON_CARD; | |
1141 | /* re-insert into ipm_list */ | |
1142 | list_add_tail(&ipm->list, &card->ipm_list); | |
1143 | } | |
1144 | goto list_modified; | |
1145 | case LCS_IPM_STATE_DEL_REQUIRED: | |
1146 | list_del(&ipm->list); | |
1147 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1148 | lcs_send_delipm(card, ipm); | |
1149 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1150 | kfree(ipm); | |
1151 | goto list_modified; | |
1152 | case LCS_IPM_STATE_ON_CARD: | |
1153 | break; | |
1154 | } | |
1155 | } | |
1156 | /* re-insert all entries from the failed_list into ipm_list */ | |
179e0917 AM |
1157 | list_for_each_entry_safe(ipm, tmp, &failed_list, list) |
1158 | list_move_tail(&ipm->list, &card->ipm_list); | |
1159 | ||
1da177e4 | 1160 | spin_unlock_irqrestore(&card->ipm_lock, flags); |
1da177e4 LT |
1161 | } |
1162 | ||
1163 | /** | |
1164 | * get mac address for the relevant Multicast address | |
1165 | */ | |
1166 | static void | |
5a5a852e | 1167 | lcs_get_mac_for_ipm(__be32 ipm, char *mac, struct net_device *dev) |
1da177e4 LT |
1168 | { |
1169 | LCS_DBF_TEXT(4,trace, "getmac"); | |
1170 | if (dev->type == ARPHRD_IEEE802_TR) | |
1171 | ip_tr_mc_map(ipm, mac); | |
1172 | else | |
1173 | ip_eth_mc_map(ipm, mac); | |
1174 | } | |
1175 | ||
1176 | /** | |
1177 | * function called by net device to handle multicast address relevant things | |
1178 | */ | |
1179 | static inline void | |
1180 | lcs_remove_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) | |
1181 | { | |
1182 | struct ip_mc_list *im4; | |
1183 | struct list_head *l; | |
1184 | struct lcs_ipm_list *ipm; | |
1185 | unsigned long flags; | |
1186 | char buf[MAX_ADDR_LEN]; | |
1187 | ||
1188 | LCS_DBF_TEXT(4, trace, "remmclst"); | |
1189 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1190 | list_for_each(l, &card->ipm_list) { | |
1191 | ipm = list_entry(l, struct lcs_ipm_list, list); | |
f3aa3136 SS |
1192 | for (im4 = rcu_dereference(in4_dev->mc_list); |
1193 | im4 != NULL; im4 = rcu_dereference(im4->next_rcu)) { | |
1da177e4 LT |
1194 | lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); |
1195 | if ( (ipm->ipm.ip_addr == im4->multiaddr) && | |
1196 | (memcmp(buf, &ipm->ipm.mac_addr, | |
1197 | LCS_MAC_LENGTH) == 0) ) | |
1198 | break; | |
1199 | } | |
1200 | if (im4 == NULL) | |
1201 | ipm->ipm_state = LCS_IPM_STATE_DEL_REQUIRED; | |
1202 | } | |
1203 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1204 | } | |
1205 | ||
1206 | static inline struct lcs_ipm_list * | |
1207 | lcs_check_addr_entry(struct lcs_card *card, struct ip_mc_list *im4, char *buf) | |
1208 | { | |
1209 | struct lcs_ipm_list *tmp, *ipm = NULL; | |
1210 | struct list_head *l; | |
1211 | unsigned long flags; | |
1212 | ||
1213 | LCS_DBF_TEXT(4, trace, "chkmcent"); | |
1214 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1215 | list_for_each(l, &card->ipm_list) { | |
1216 | tmp = list_entry(l, struct lcs_ipm_list, list); | |
1217 | if ( (tmp->ipm.ip_addr == im4->multiaddr) && | |
1218 | (memcmp(buf, &tmp->ipm.mac_addr, | |
1219 | LCS_MAC_LENGTH) == 0) ) { | |
1220 | ipm = tmp; | |
1221 | break; | |
1222 | } | |
1223 | } | |
1224 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1225 | return ipm; | |
1226 | } | |
1227 | ||
1228 | static inline void | |
1229 | lcs_set_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) | |
1230 | { | |
1231 | ||
1232 | struct ip_mc_list *im4; | |
1233 | struct lcs_ipm_list *ipm; | |
1234 | char buf[MAX_ADDR_LEN]; | |
1235 | unsigned long flags; | |
1236 | ||
1237 | LCS_DBF_TEXT(4, trace, "setmclst"); | |
f3aa3136 SS |
1238 | for (im4 = rcu_dereference(in4_dev->mc_list); im4 != NULL; |
1239 | im4 = rcu_dereference(im4->next_rcu)) { | |
1da177e4 LT |
1240 | lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); |
1241 | ipm = lcs_check_addr_entry(card, im4, buf); | |
1242 | if (ipm != NULL) | |
1243 | continue; /* Address already in list. */ | |
ae57b20a | 1244 | ipm = kzalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC); |
1da177e4 | 1245 | if (ipm == NULL) { |
c99fc5da KW |
1246 | pr_info("Not enough memory to add" |
1247 | " new multicast entry!\n"); | |
1da177e4 LT |
1248 | break; |
1249 | } | |
1da177e4 LT |
1250 | memcpy(&ipm->ipm.mac_addr, buf, LCS_MAC_LENGTH); |
1251 | ipm->ipm.ip_addr = im4->multiaddr; | |
1252 | ipm->ipm_state = LCS_IPM_STATE_SET_REQUIRED; | |
1253 | spin_lock_irqsave(&card->ipm_lock, flags); | |
27eb5ac8 | 1254 | LCS_DBF_HEX(2,trace,&ipm->ipm.ip_addr,4); |
1da177e4 LT |
1255 | list_add(&ipm->list, &card->ipm_list); |
1256 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1257 | } | |
1258 | } | |
1259 | ||
1260 | static int | |
1261 | lcs_register_mc_addresses(void *data) | |
1262 | { | |
1263 | struct lcs_card *card; | |
1264 | struct in_device *in4_dev; | |
1265 | ||
1266 | card = (struct lcs_card *) data; | |
1da177e4 LT |
1267 | |
1268 | if (!lcs_do_run_thread(card, LCS_SET_MC_THREAD)) | |
1269 | return 0; | |
1270 | LCS_DBF_TEXT(4, trace, "regmulti"); | |
1271 | ||
1272 | in4_dev = in_dev_get(card->dev); | |
1273 | if (in4_dev == NULL) | |
1274 | goto out; | |
f3aa3136 | 1275 | rcu_read_lock(); |
1da177e4 LT |
1276 | lcs_remove_mc_addresses(card,in4_dev); |
1277 | lcs_set_mc_addresses(card, in4_dev); | |
f3aa3136 | 1278 | rcu_read_unlock(); |
1da177e4 LT |
1279 | in_dev_put(in4_dev); |
1280 | ||
27eb5ac8 KW |
1281 | netif_carrier_off(card->dev); |
1282 | netif_tx_disable(card->dev); | |
1283 | wait_event(card->write.wait_q, | |
9163bb2e | 1284 | (card->write.state != LCS_CH_STATE_RUNNING)); |
1da177e4 | 1285 | lcs_fix_multicast_list(card); |
27eb5ac8 KW |
1286 | if (card->state == DEV_STATE_UP) { |
1287 | netif_carrier_on(card->dev); | |
1288 | netif_wake_queue(card->dev); | |
1289 | } | |
1da177e4 LT |
1290 | out: |
1291 | lcs_clear_thread_running_bit(card, LCS_SET_MC_THREAD); | |
1292 | return 0; | |
1293 | } | |
801599b0 HC |
1294 | #endif /* CONFIG_IP_MULTICAST */ |
1295 | ||
1da177e4 LT |
1296 | /** |
1297 | * function called by net device to | |
1298 | * handle multicast address relevant things | |
1299 | */ | |
1300 | static void | |
1301 | lcs_set_multicast_list(struct net_device *dev) | |
1302 | { | |
801599b0 | 1303 | #ifdef CONFIG_IP_MULTICAST |
1da177e4 LT |
1304 | struct lcs_card *card; |
1305 | ||
1306 | LCS_DBF_TEXT(4, trace, "setmulti"); | |
ad660e2f | 1307 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 | 1308 | |
e82b0f2c | 1309 | if (!lcs_set_thread_start_bit(card, LCS_SET_MC_THREAD)) |
1da177e4 | 1310 | schedule_work(&card->kernel_thread_starter); |
1da177e4 | 1311 | #endif /* CONFIG_IP_MULTICAST */ |
801599b0 | 1312 | } |
1da177e4 LT |
1313 | |
1314 | static long | |
1315 | lcs_check_irb_error(struct ccw_device *cdev, struct irb *irb) | |
1316 | { | |
1317 | if (!IS_ERR(irb)) | |
1318 | return 0; | |
1319 | ||
1320 | switch (PTR_ERR(irb)) { | |
1321 | case -EIO: | |
c99fc5da KW |
1322 | dev_warn(&cdev->dev, |
1323 | "An I/O-error occurred on the LCS device\n"); | |
1da177e4 LT |
1324 | LCS_DBF_TEXT(2, trace, "ckirberr"); |
1325 | LCS_DBF_TEXT_(2, trace, " rc%d", -EIO); | |
1326 | break; | |
1327 | case -ETIMEDOUT: | |
c99fc5da KW |
1328 | dev_warn(&cdev->dev, |
1329 | "A command timed out on the LCS device\n"); | |
1da177e4 LT |
1330 | LCS_DBF_TEXT(2, trace, "ckirberr"); |
1331 | LCS_DBF_TEXT_(2, trace, " rc%d", -ETIMEDOUT); | |
1332 | break; | |
1333 | default: | |
c99fc5da KW |
1334 | dev_warn(&cdev->dev, |
1335 | "An error occurred on the LCS device, rc=%ld\n", | |
1336 | PTR_ERR(irb)); | |
1da177e4 LT |
1337 | LCS_DBF_TEXT(2, trace, "ckirberr"); |
1338 | LCS_DBF_TEXT(2, trace, " rc???"); | |
1339 | } | |
1340 | return PTR_ERR(irb); | |
1341 | } | |
1342 | ||
27eb5ac8 KW |
1343 | static int |
1344 | lcs_get_problem(struct ccw_device *cdev, struct irb *irb) | |
1345 | { | |
1346 | int dstat, cstat; | |
1347 | char *sense; | |
1348 | ||
1349 | sense = (char *) irb->ecw; | |
23d805b6 PO |
1350 | cstat = irb->scsw.cmd.cstat; |
1351 | dstat = irb->scsw.cmd.dstat; | |
27eb5ac8 KW |
1352 | |
1353 | if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK | | |
1354 | SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK | | |
1355 | SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) { | |
1356 | LCS_DBF_TEXT(2, trace, "CGENCHK"); | |
1357 | return 1; | |
1358 | } | |
1359 | if (dstat & DEV_STAT_UNIT_CHECK) { | |
1360 | if (sense[LCS_SENSE_BYTE_1] & | |
1361 | LCS_SENSE_RESETTING_EVENT) { | |
1362 | LCS_DBF_TEXT(2, trace, "REVIND"); | |
1363 | return 1; | |
1364 | } | |
1365 | if (sense[LCS_SENSE_BYTE_0] & | |
1366 | LCS_SENSE_CMD_REJECT) { | |
1367 | LCS_DBF_TEXT(2, trace, "CMDREJ"); | |
1368 | return 0; | |
1369 | } | |
1370 | if ((!sense[LCS_SENSE_BYTE_0]) && | |
1371 | (!sense[LCS_SENSE_BYTE_1]) && | |
1372 | (!sense[LCS_SENSE_BYTE_2]) && | |
1373 | (!sense[LCS_SENSE_BYTE_3])) { | |
1374 | LCS_DBF_TEXT(2, trace, "ZEROSEN"); | |
1375 | return 0; | |
1376 | } | |
1377 | LCS_DBF_TEXT(2, trace, "DGENCHK"); | |
1378 | return 1; | |
1379 | } | |
1380 | return 0; | |
1381 | } | |
1382 | ||
2b67fc46 | 1383 | static void |
27eb5ac8 KW |
1384 | lcs_schedule_recovery(struct lcs_card *card) |
1385 | { | |
1386 | LCS_DBF_TEXT(2, trace, "startrec"); | |
1387 | if (!lcs_set_thread_start_bit(card, LCS_RECOVERY_THREAD)) | |
1388 | schedule_work(&card->kernel_thread_starter); | |
1389 | } | |
1da177e4 LT |
1390 | |
1391 | /** | |
1392 | * IRQ Handler for LCS channels | |
1393 | */ | |
1394 | static void | |
1395 | lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb) | |
1396 | { | |
1397 | struct lcs_card *card; | |
1398 | struct lcs_channel *channel; | |
27eb5ac8 KW |
1399 | int rc, index; |
1400 | int cstat, dstat; | |
1da177e4 | 1401 | |
096a6168 | 1402 | kstat_cpu(smp_processor_id()).irqs[IOINT_LCS]++; |
1da177e4 LT |
1403 | if (lcs_check_irb_error(cdev, irb)) |
1404 | return; | |
1405 | ||
1406 | card = CARD_FROM_DEV(cdev); | |
1407 | if (card->read.ccwdev == cdev) | |
1408 | channel = &card->read; | |
1409 | else | |
1410 | channel = &card->write; | |
1411 | ||
23d805b6 PO |
1412 | cstat = irb->scsw.cmd.cstat; |
1413 | dstat = irb->scsw.cmd.dstat; | |
2a0217d5 | 1414 | LCS_DBF_TEXT_(5, trace, "Rint%s", dev_name(&cdev->dev)); |
23d805b6 PO |
1415 | LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.cstat, |
1416 | irb->scsw.cmd.dstat); | |
1417 | LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.fctl, | |
1418 | irb->scsw.cmd.actl); | |
1da177e4 | 1419 | |
27eb5ac8 KW |
1420 | /* Check for channel and device errors presented */ |
1421 | rc = lcs_get_problem(cdev, irb); | |
1422 | if (rc || (dstat & DEV_STAT_UNIT_EXCEP)) { | |
c99fc5da KW |
1423 | dev_warn(&cdev->dev, |
1424 | "The LCS device stopped because of an error," | |
1425 | " dstat=0x%X, cstat=0x%X \n", | |
1426 | dstat, cstat); | |
27eb5ac8 | 1427 | if (rc) { |
59579da3 | 1428 | channel->state = LCS_CH_STATE_ERROR; |
27eb5ac8 KW |
1429 | } |
1430 | } | |
59579da3 KW |
1431 | if (channel->state == LCS_CH_STATE_ERROR) { |
1432 | lcs_schedule_recovery(card); | |
1433 | wake_up(&card->wait_q); | |
1434 | return; | |
1435 | } | |
1da177e4 | 1436 | /* How far in the ccw chain have we processed? */ |
9163bb2e | 1437 | if ((channel->state != LCS_CH_STATE_INIT) && |
9b3b9ab6 KW |
1438 | (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) && |
1439 | (irb->scsw.cmd.cpa != 0)) { | |
23d805b6 | 1440 | index = (struct ccw1 *) __va((addr_t) irb->scsw.cmd.cpa) |
1da177e4 | 1441 | - channel->ccws; |
23d805b6 PO |
1442 | if ((irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) || |
1443 | (irb->scsw.cmd.cstat & SCHN_STAT_PCI)) | |
1da177e4 LT |
1444 | /* Bloody io subsystem tells us lies about cpa... */ |
1445 | index = (index - 1) & (LCS_NUM_BUFFS - 1); | |
1446 | while (channel->io_idx != index) { | |
1447 | __lcs_processed_buffer(channel, | |
1448 | channel->iob + channel->io_idx); | |
1449 | channel->io_idx = | |
1450 | (channel->io_idx + 1) & (LCS_NUM_BUFFS - 1); | |
1451 | } | |
1452 | } | |
1453 | ||
23d805b6 PO |
1454 | if ((irb->scsw.cmd.dstat & DEV_STAT_DEV_END) || |
1455 | (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) || | |
1456 | (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)) | |
1da177e4 | 1457 | /* Mark channel as stopped. */ |
9163bb2e | 1458 | channel->state = LCS_CH_STATE_STOPPED; |
23d805b6 | 1459 | else if (irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) |
1da177e4 | 1460 | /* CCW execution stopped on a suspend bit. */ |
9163bb2e | 1461 | channel->state = LCS_CH_STATE_SUSPENDED; |
23d805b6 PO |
1462 | if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) { |
1463 | if (irb->scsw.cmd.cc != 0) { | |
1da177e4 LT |
1464 | ccw_device_halt(channel->ccwdev, (addr_t) channel); |
1465 | return; | |
1466 | } | |
1467 | /* The channel has been stopped by halt_IO. */ | |
9163bb2e | 1468 | channel->state = LCS_CH_STATE_HALTED; |
1da177e4 | 1469 | } |
23d805b6 | 1470 | if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) |
9163bb2e | 1471 | channel->state = LCS_CH_STATE_CLEARED; |
1da177e4 LT |
1472 | /* Do the rest in the tasklet. */ |
1473 | tasklet_schedule(&channel->irq_tasklet); | |
1474 | } | |
1475 | ||
1476 | /** | |
1477 | * Tasklet for IRQ handler | |
1478 | */ | |
1479 | static void | |
1480 | lcs_tasklet(unsigned long data) | |
1481 | { | |
1482 | unsigned long flags; | |
1483 | struct lcs_channel *channel; | |
1484 | struct lcs_buffer *iob; | |
1485 | int buf_idx; | |
1486 | int rc; | |
1487 | ||
1488 | channel = (struct lcs_channel *) data; | |
2a0217d5 | 1489 | LCS_DBF_TEXT_(5, trace, "tlet%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
1490 | |
1491 | /* Check for processed buffers. */ | |
1492 | iob = channel->iob; | |
1493 | buf_idx = channel->buf_idx; | |
9163bb2e | 1494 | while (iob[buf_idx].state == LCS_BUF_STATE_PROCESSED) { |
1da177e4 LT |
1495 | /* Do the callback thing. */ |
1496 | if (iob[buf_idx].callback != NULL) | |
1497 | iob[buf_idx].callback(channel, iob + buf_idx); | |
1498 | buf_idx = (buf_idx + 1) & (LCS_NUM_BUFFS - 1); | |
1499 | } | |
1500 | channel->buf_idx = buf_idx; | |
1501 | ||
9163bb2e | 1502 | if (channel->state == LCS_CH_STATE_STOPPED) |
1da177e4 LT |
1503 | // FIXME: what if rc != 0 ?? |
1504 | rc = lcs_start_channel(channel); | |
1505 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); | |
9163bb2e UB |
1506 | if (channel->state == LCS_CH_STATE_SUSPENDED && |
1507 | channel->iob[channel->io_idx].state == LCS_BUF_STATE_READY) { | |
1da177e4 LT |
1508 | // FIXME: what if rc != 0 ?? |
1509 | rc = __lcs_resume_channel(channel); | |
1510 | } | |
1511 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
1512 | ||
1513 | /* Something happened on the channel. Wake up waiters. */ | |
1514 | wake_up(&channel->wait_q); | |
1515 | } | |
1516 | ||
1517 | /** | |
1518 | * Finish current tx buffer and make it ready for transmit. | |
1519 | */ | |
1520 | static void | |
1521 | __lcs_emit_txbuffer(struct lcs_card *card) | |
1522 | { | |
1523 | LCS_DBF_TEXT(5, trace, "emittx"); | |
1524 | *(__u16 *)(card->tx_buffer->data + card->tx_buffer->count) = 0; | |
1525 | card->tx_buffer->count += 2; | |
1526 | lcs_ready_buffer(&card->write, card->tx_buffer); | |
1527 | card->tx_buffer = NULL; | |
1528 | card->tx_emitted++; | |
1529 | } | |
1530 | ||
1531 | /** | |
1532 | * Callback for finished tx buffers. | |
1533 | */ | |
1534 | static void | |
1535 | lcs_txbuffer_cb(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
1536 | { | |
1537 | struct lcs_card *card; | |
1538 | ||
1539 | LCS_DBF_TEXT(5, trace, "txbuffcb"); | |
1540 | /* Put buffer back to pool. */ | |
1541 | lcs_release_buffer(channel, buffer); | |
b385a144 | 1542 | card = container_of(channel, struct lcs_card, write); |
27eb5ac8 | 1543 | if (netif_queue_stopped(card->dev) && netif_carrier_ok(card->dev)) |
0d613a27 | 1544 | netif_wake_queue(card->dev); |
1da177e4 LT |
1545 | spin_lock(&card->lock); |
1546 | card->tx_emitted--; | |
1547 | if (card->tx_emitted <= 0 && card->tx_buffer != NULL) | |
1548 | /* | |
1549 | * Last running tx buffer has finished. Submit partially | |
1550 | * filled current buffer. | |
1551 | */ | |
1552 | __lcs_emit_txbuffer(card); | |
1553 | spin_unlock(&card->lock); | |
1554 | } | |
1555 | ||
1556 | /** | |
1557 | * Packet transmit function called by network stack | |
1558 | */ | |
1559 | static int | |
1560 | __lcs_start_xmit(struct lcs_card *card, struct sk_buff *skb, | |
1561 | struct net_device *dev) | |
1562 | { | |
1563 | struct lcs_header *header; | |
ec634fe3 | 1564 | int rc = NETDEV_TX_OK; |
1da177e4 LT |
1565 | |
1566 | LCS_DBF_TEXT(5, trace, "hardxmit"); | |
1567 | if (skb == NULL) { | |
1568 | card->stats.tx_dropped++; | |
1569 | card->stats.tx_errors++; | |
ec634fe3 | 1570 | return NETDEV_TX_OK; |
1da177e4 LT |
1571 | } |
1572 | if (card->state != DEV_STATE_UP) { | |
1573 | dev_kfree_skb(skb); | |
1574 | card->stats.tx_dropped++; | |
1575 | card->stats.tx_errors++; | |
1576 | card->stats.tx_carrier_errors++; | |
ec634fe3 | 1577 | return NETDEV_TX_OK; |
1da177e4 | 1578 | } |
27eb5ac8 KW |
1579 | if (skb->protocol == htons(ETH_P_IPV6)) { |
1580 | dev_kfree_skb(skb); | |
ec634fe3 | 1581 | return NETDEV_TX_OK; |
27eb5ac8 | 1582 | } |
0d613a27 FP |
1583 | netif_stop_queue(card->dev); |
1584 | spin_lock(&card->lock); | |
1da177e4 LT |
1585 | if (card->tx_buffer != NULL && |
1586 | card->tx_buffer->count + sizeof(struct lcs_header) + | |
1587 | skb->len + sizeof(u16) > LCS_IOBUFFERSIZE) | |
1588 | /* skb too big for current tx buffer. */ | |
1589 | __lcs_emit_txbuffer(card); | |
1590 | if (card->tx_buffer == NULL) { | |
1591 | /* Get new tx buffer */ | |
1592 | card->tx_buffer = lcs_get_buffer(&card->write); | |
1593 | if (card->tx_buffer == NULL) { | |
1594 | card->stats.tx_dropped++; | |
9e669d32 | 1595 | rc = NETDEV_TX_BUSY; |
0d613a27 | 1596 | goto out; |
1da177e4 LT |
1597 | } |
1598 | card->tx_buffer->callback = lcs_txbuffer_cb; | |
1599 | card->tx_buffer->count = 0; | |
1600 | } | |
1601 | header = (struct lcs_header *) | |
1602 | (card->tx_buffer->data + card->tx_buffer->count); | |
1603 | card->tx_buffer->count += skb->len + sizeof(struct lcs_header); | |
1604 | header->offset = card->tx_buffer->count; | |
1605 | header->type = card->lan_type; | |
1606 | header->slot = card->portno; | |
d626f62b | 1607 | skb_copy_from_linear_data(skb, header + 1, skb->len); |
0d613a27 | 1608 | spin_unlock(&card->lock); |
1da177e4 LT |
1609 | card->stats.tx_bytes += skb->len; |
1610 | card->stats.tx_packets++; | |
1611 | dev_kfree_skb(skb); | |
0d613a27 FP |
1612 | netif_wake_queue(card->dev); |
1613 | spin_lock(&card->lock); | |
1614 | if (card->tx_emitted <= 0 && card->tx_buffer != NULL) | |
1da177e4 LT |
1615 | /* If this is the first tx buffer emit it immediately. */ |
1616 | __lcs_emit_txbuffer(card); | |
0d613a27 FP |
1617 | out: |
1618 | spin_unlock(&card->lock); | |
1619 | return rc; | |
1da177e4 LT |
1620 | } |
1621 | ||
1622 | static int | |
1623 | lcs_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1624 | { | |
1625 | struct lcs_card *card; | |
1626 | int rc; | |
1627 | ||
1628 | LCS_DBF_TEXT(5, trace, "pktxmit"); | |
ad660e2f | 1629 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 | 1630 | rc = __lcs_start_xmit(card, skb, dev); |
1da177e4 LT |
1631 | return rc; |
1632 | } | |
1633 | ||
1634 | /** | |
1635 | * send startlan and lanstat command to make LCS device ready | |
1636 | */ | |
1637 | static int | |
1638 | lcs_startlan_auto(struct lcs_card *card) | |
1639 | { | |
1640 | int rc; | |
1641 | ||
1642 | LCS_DBF_TEXT(2, trace, "strtauto"); | |
1643 | #ifdef CONFIG_NET_ETHERNET | |
1644 | card->lan_type = LCS_FRAME_TYPE_ENET; | |
1645 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1646 | if (rc == 0) | |
1647 | return 0; | |
1648 | ||
1649 | #endif | |
1650 | #ifdef CONFIG_TR | |
1651 | card->lan_type = LCS_FRAME_TYPE_TR; | |
1652 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1653 | if (rc == 0) | |
1654 | return 0; | |
1655 | #endif | |
1656 | #ifdef CONFIG_FDDI | |
1657 | card->lan_type = LCS_FRAME_TYPE_FDDI; | |
1658 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1659 | if (rc == 0) | |
1660 | return 0; | |
1661 | #endif | |
1662 | return -EIO; | |
1663 | } | |
1664 | ||
1665 | static int | |
1666 | lcs_startlan(struct lcs_card *card) | |
1667 | { | |
1668 | int rc, i; | |
1669 | ||
1670 | LCS_DBF_TEXT(2, trace, "startlan"); | |
1671 | rc = 0; | |
1672 | if (card->portno != LCS_INVALID_PORT_NO) { | |
1673 | if (card->lan_type == LCS_FRAME_TYPE_AUTO) | |
1674 | rc = lcs_startlan_auto(card); | |
1675 | else | |
1676 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1677 | } else { | |
1678 | for (i = 0; i <= 16; i++) { | |
1679 | card->portno = i; | |
1680 | if (card->lan_type != LCS_FRAME_TYPE_AUTO) | |
1681 | rc = lcs_send_startlan(card, | |
1682 | LCS_INITIATOR_TCPIP); | |
1683 | else | |
1684 | /* autodetecting lan type */ | |
1685 | rc = lcs_startlan_auto(card); | |
1686 | if (rc == 0) | |
1687 | break; | |
1688 | } | |
1689 | } | |
1690 | if (rc == 0) | |
1691 | return lcs_send_lanstat(card); | |
1692 | return rc; | |
1693 | } | |
1694 | ||
1695 | /** | |
1696 | * LCS detect function | |
1697 | * setup channels and make them I/O ready | |
1698 | */ | |
1699 | static int | |
1700 | lcs_detect(struct lcs_card *card) | |
1701 | { | |
1702 | int rc = 0; | |
1703 | ||
1704 | LCS_DBF_TEXT(2, setup, "lcsdetct"); | |
1705 | /* start/reset card */ | |
1706 | if (card->dev) | |
1707 | netif_stop_queue(card->dev); | |
1708 | rc = lcs_stop_channels(card); | |
1709 | if (rc == 0) { | |
1710 | rc = lcs_start_channels(card); | |
1711 | if (rc == 0) { | |
1712 | rc = lcs_send_startup(card, LCS_INITIATOR_TCPIP); | |
1713 | if (rc == 0) | |
1714 | rc = lcs_startlan(card); | |
1715 | } | |
1716 | } | |
1717 | if (rc == 0) { | |
1718 | card->state = DEV_STATE_UP; | |
1719 | } else { | |
1720 | card->state = DEV_STATE_DOWN; | |
9163bb2e UB |
1721 | card->write.state = LCS_CH_STATE_INIT; |
1722 | card->read.state = LCS_CH_STATE_INIT; | |
1da177e4 LT |
1723 | } |
1724 | return rc; | |
1725 | } | |
1726 | ||
1da177e4 LT |
1727 | /** |
1728 | * LCS Stop card | |
1729 | */ | |
1730 | static int | |
1731 | lcs_stopcard(struct lcs_card *card) | |
1732 | { | |
1733 | int rc; | |
1734 | ||
1735 | LCS_DBF_TEXT(3, setup, "stopcard"); | |
1736 | ||
9163bb2e UB |
1737 | if (card->read.state != LCS_CH_STATE_STOPPED && |
1738 | card->write.state != LCS_CH_STATE_STOPPED && | |
59579da3 KW |
1739 | card->read.state != LCS_CH_STATE_ERROR && |
1740 | card->write.state != LCS_CH_STATE_ERROR && | |
1da177e4 LT |
1741 | card->state == DEV_STATE_UP) { |
1742 | lcs_clear_multicast_list(card); | |
1743 | rc = lcs_send_stoplan(card,LCS_INITIATOR_TCPIP); | |
1744 | rc = lcs_send_shutdown(card); | |
1745 | } | |
1746 | rc = lcs_stop_channels(card); | |
1747 | card->state = DEV_STATE_DOWN; | |
1748 | ||
1749 | return rc; | |
1750 | } | |
1751 | ||
1da177e4 LT |
1752 | /** |
1753 | * Kernel Thread helper functions for LGW initiated commands | |
1754 | */ | |
1755 | static void | |
4927b3f7 | 1756 | lcs_start_kernel_thread(struct work_struct *work) |
1da177e4 | 1757 | { |
4927b3f7 | 1758 | struct lcs_card *card = container_of(work, struct lcs_card, kernel_thread_starter); |
1da177e4 | 1759 | LCS_DBF_TEXT(5, trace, "krnthrd"); |
27eb5ac8 | 1760 | if (lcs_do_start_thread(card, LCS_RECOVERY_THREAD)) |
e5b5719b | 1761 | kthread_run(lcs_recovery, card, "lcs_recover"); |
1da177e4 LT |
1762 | #ifdef CONFIG_IP_MULTICAST |
1763 | if (lcs_do_start_thread(card, LCS_SET_MC_THREAD)) | |
e5b5719b | 1764 | kthread_run(lcs_register_mc_addresses, card, "regipm"); |
1da177e4 LT |
1765 | #endif |
1766 | } | |
1767 | ||
1768 | /** | |
1769 | * Process control frames. | |
1770 | */ | |
1771 | static void | |
1772 | lcs_get_control(struct lcs_card *card, struct lcs_cmd *cmd) | |
1773 | { | |
1774 | LCS_DBF_TEXT(5, trace, "getctrl"); | |
1775 | if (cmd->initiator == LCS_INITIATOR_LGW) { | |
1776 | switch(cmd->cmd_code) { | |
1777 | case LCS_CMD_STARTUP: | |
1da177e4 | 1778 | case LCS_CMD_STARTLAN: |
27eb5ac8 | 1779 | lcs_schedule_recovery(card); |
1da177e4 LT |
1780 | break; |
1781 | case LCS_CMD_STOPLAN: | |
c99fc5da KW |
1782 | pr_warning("Stoplan for %s initiated by LGW.\n", |
1783 | card->dev->name); | |
27eb5ac8 KW |
1784 | if (card->dev) |
1785 | netif_carrier_off(card->dev); | |
1da177e4 LT |
1786 | break; |
1787 | default: | |
6b648063 | 1788 | LCS_DBF_TEXT(5, trace, "noLGWcmd"); |
1da177e4 LT |
1789 | break; |
1790 | } | |
1791 | } else | |
1792 | lcs_notify_lancmd_waiters(card, cmd); | |
1793 | } | |
1794 | ||
1795 | /** | |
1796 | * Unpack network packet. | |
1797 | */ | |
1798 | static void | |
1799 | lcs_get_skb(struct lcs_card *card, char *skb_data, unsigned int skb_len) | |
1800 | { | |
1801 | struct sk_buff *skb; | |
1802 | ||
1803 | LCS_DBF_TEXT(5, trace, "getskb"); | |
1804 | if (card->dev == NULL || | |
1805 | card->state != DEV_STATE_UP) | |
1806 | /* The card isn't up. Ignore the packet. */ | |
1807 | return; | |
1808 | ||
1809 | skb = dev_alloc_skb(skb_len); | |
1810 | if (skb == NULL) { | |
c99fc5da KW |
1811 | dev_err(&card->dev->dev, |
1812 | " Allocating a socket buffer to interface %s failed\n", | |
1da177e4 LT |
1813 | card->dev->name); |
1814 | card->stats.rx_dropped++; | |
1815 | return; | |
1816 | } | |
1da177e4 LT |
1817 | memcpy(skb_put(skb, skb_len), skb_data, skb_len); |
1818 | skb->protocol = card->lan_type_trans(skb, card->dev); | |
1819 | card->stats.rx_bytes += skb_len; | |
1820 | card->stats.rx_packets++; | |
93ad37d9 KW |
1821 | if (skb->protocol == htons(ETH_P_802_2)) |
1822 | *((__u32 *)skb->cb) = ++card->pkt_seq; | |
1da177e4 LT |
1823 | netif_rx(skb); |
1824 | } | |
1825 | ||
1826 | /** | |
1827 | * LCS main routine to get packets and lancmd replies from the buffers | |
1828 | */ | |
1829 | static void | |
1830 | lcs_get_frames_cb(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
1831 | { | |
1832 | struct lcs_card *card; | |
1833 | struct lcs_header *lcs_hdr; | |
1834 | __u16 offset; | |
1835 | ||
1836 | LCS_DBF_TEXT(5, trace, "lcsgtpkt"); | |
1837 | lcs_hdr = (struct lcs_header *) buffer->data; | |
1838 | if (lcs_hdr->offset == LCS_ILLEGAL_OFFSET) { | |
1839 | LCS_DBF_TEXT(4, trace, "-eiogpkt"); | |
1840 | return; | |
1841 | } | |
b385a144 | 1842 | card = container_of(channel, struct lcs_card, read); |
1da177e4 LT |
1843 | offset = 0; |
1844 | while (lcs_hdr->offset != 0) { | |
1845 | if (lcs_hdr->offset <= 0 || | |
1846 | lcs_hdr->offset > LCS_IOBUFFERSIZE || | |
1847 | lcs_hdr->offset < offset) { | |
1848 | /* Offset invalid. */ | |
1849 | card->stats.rx_length_errors++; | |
1850 | card->stats.rx_errors++; | |
1851 | return; | |
1852 | } | |
1853 | /* What kind of frame is it? */ | |
1854 | if (lcs_hdr->type == LCS_FRAME_TYPE_CONTROL) | |
1855 | /* Control frame. */ | |
1856 | lcs_get_control(card, (struct lcs_cmd *) lcs_hdr); | |
1857 | else if (lcs_hdr->type == LCS_FRAME_TYPE_ENET || | |
1858 | lcs_hdr->type == LCS_FRAME_TYPE_TR || | |
1859 | lcs_hdr->type == LCS_FRAME_TYPE_FDDI) | |
1860 | /* Normal network packet. */ | |
1861 | lcs_get_skb(card, (char *)(lcs_hdr + 1), | |
1862 | lcs_hdr->offset - offset - | |
1863 | sizeof(struct lcs_header)); | |
1864 | else | |
1865 | /* Unknown frame type. */ | |
1866 | ; // FIXME: error message ? | |
1867 | /* Proceed to next frame. */ | |
1868 | offset = lcs_hdr->offset; | |
1869 | lcs_hdr->offset = LCS_ILLEGAL_OFFSET; | |
1870 | lcs_hdr = (struct lcs_header *) (buffer->data + offset); | |
1871 | } | |
1872 | /* The buffer is now empty. Make it ready again. */ | |
1873 | lcs_ready_buffer(&card->read, buffer); | |
1874 | } | |
1875 | ||
1876 | /** | |
1877 | * get network statistics for ifconfig and other user programs | |
1878 | */ | |
1879 | static struct net_device_stats * | |
1880 | lcs_getstats(struct net_device *dev) | |
1881 | { | |
1882 | struct lcs_card *card; | |
1883 | ||
1884 | LCS_DBF_TEXT(4, trace, "netstats"); | |
ad660e2f | 1885 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 LT |
1886 | return &card->stats; |
1887 | } | |
1888 | ||
1889 | /** | |
1890 | * stop lcs device | |
1891 | * This function will be called by user doing ifconfig xxx down | |
1892 | */ | |
1893 | static int | |
1894 | lcs_stop_device(struct net_device *dev) | |
1895 | { | |
1896 | struct lcs_card *card; | |
1897 | int rc; | |
1898 | ||
1899 | LCS_DBF_TEXT(2, trace, "stopdev"); | |
ad660e2f | 1900 | card = (struct lcs_card *) dev->ml_priv; |
27eb5ac8 KW |
1901 | netif_carrier_off(dev); |
1902 | netif_tx_disable(dev); | |
1da177e4 | 1903 | dev->flags &= ~IFF_UP; |
27eb5ac8 | 1904 | wait_event(card->write.wait_q, |
9163bb2e | 1905 | (card->write.state != LCS_CH_STATE_RUNNING)); |
1da177e4 LT |
1906 | rc = lcs_stopcard(card); |
1907 | if (rc) | |
c99fc5da KW |
1908 | dev_err(&card->dev->dev, |
1909 | " Shutting down the LCS device failed\n "); | |
1da177e4 LT |
1910 | return rc; |
1911 | } | |
1912 | ||
1913 | /** | |
1914 | * start lcs device and make it runnable | |
1915 | * This function will be called by user doing ifconfig xxx up | |
1916 | */ | |
1917 | static int | |
1918 | lcs_open_device(struct net_device *dev) | |
1919 | { | |
1920 | struct lcs_card *card; | |
1921 | int rc; | |
1922 | ||
1923 | LCS_DBF_TEXT(2, trace, "opendev"); | |
ad660e2f | 1924 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 LT |
1925 | /* initialize statistics */ |
1926 | rc = lcs_detect(card); | |
1927 | if (rc) { | |
c99fc5da | 1928 | pr_err("Error in opening device!\n"); |
1da177e4 LT |
1929 | |
1930 | } else { | |
1931 | dev->flags |= IFF_UP; | |
27eb5ac8 | 1932 | netif_carrier_on(dev); |
1da177e4 LT |
1933 | netif_wake_queue(dev); |
1934 | card->state = DEV_STATE_UP; | |
1935 | } | |
1936 | return rc; | |
1937 | } | |
1938 | ||
1939 | /** | |
1940 | * show function for portno called by cat or similar things | |
1941 | */ | |
1942 | static ssize_t | |
3fd3c0a5 | 1943 | lcs_portno_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1944 | { |
1945 | struct lcs_card *card; | |
1946 | ||
dff59b64 | 1947 | card = dev_get_drvdata(dev); |
1da177e4 LT |
1948 | |
1949 | if (!card) | |
1950 | return 0; | |
1951 | ||
1952 | return sprintf(buf, "%d\n", card->portno); | |
1953 | } | |
1954 | ||
1955 | /** | |
1956 | * store the value which is piped to file portno | |
1957 | */ | |
1958 | static ssize_t | |
3fd3c0a5 | 1959 | lcs_portno_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1960 | { |
1961 | struct lcs_card *card; | |
1962 | int value; | |
1963 | ||
dff59b64 | 1964 | card = dev_get_drvdata(dev); |
1da177e4 LT |
1965 | |
1966 | if (!card) | |
1967 | return 0; | |
1968 | ||
1969 | sscanf(buf, "%u", &value); | |
1970 | /* TODO: sanity checks */ | |
1971 | card->portno = value; | |
1972 | ||
1973 | return count; | |
1974 | ||
1975 | } | |
1976 | ||
1977 | static DEVICE_ATTR(portno, 0644, lcs_portno_show, lcs_portno_store); | |
1978 | ||
0ca8cc6f UB |
1979 | const char *lcs_type[] = { |
1980 | "not a channel", | |
1981 | "2216 parallel", | |
1982 | "2216 channel", | |
1983 | "OSA LCS card", | |
1984 | "unknown channel type", | |
1985 | "unsupported channel type", | |
1986 | }; | |
1987 | ||
1da177e4 | 1988 | static ssize_t |
3fd3c0a5 | 1989 | lcs_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1990 | { |
1991 | struct ccwgroup_device *cgdev; | |
1992 | ||
1993 | cgdev = to_ccwgroupdev(dev); | |
1994 | if (!cgdev) | |
1995 | return -ENODEV; | |
1996 | ||
0ca8cc6f | 1997 | return sprintf(buf, "%s\n", lcs_type[cgdev->cdev[0]->id.driver_info]); |
1da177e4 LT |
1998 | } |
1999 | ||
2000 | static DEVICE_ATTR(type, 0444, lcs_type_show, NULL); | |
2001 | ||
2002 | static ssize_t | |
3fd3c0a5 | 2003 | lcs_timeout_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
2004 | { |
2005 | struct lcs_card *card; | |
2006 | ||
dff59b64 | 2007 | card = dev_get_drvdata(dev); |
1da177e4 LT |
2008 | |
2009 | return card ? sprintf(buf, "%u\n", card->lancmd_timeout) : 0; | |
2010 | } | |
2011 | ||
2012 | static ssize_t | |
3fd3c0a5 | 2013 | lcs_timeout_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
2014 | { |
2015 | struct lcs_card *card; | |
2016 | int value; | |
2017 | ||
dff59b64 | 2018 | card = dev_get_drvdata(dev); |
1da177e4 LT |
2019 | |
2020 | if (!card) | |
2021 | return 0; | |
2022 | ||
2023 | sscanf(buf, "%u", &value); | |
2024 | /* TODO: sanity checks */ | |
2025 | card->lancmd_timeout = value; | |
2026 | ||
2027 | return count; | |
2028 | ||
2029 | } | |
2030 | ||
2b67fc46 | 2031 | static DEVICE_ATTR(lancmd_timeout, 0644, lcs_timeout_show, lcs_timeout_store); |
1da177e4 | 2032 | |
27eb5ac8 | 2033 | static ssize_t |
e82b0f2c | 2034 | lcs_dev_recover_store(struct device *dev, struct device_attribute *attr, |
27eb5ac8 KW |
2035 | const char *buf, size_t count) |
2036 | { | |
dff59b64 | 2037 | struct lcs_card *card = dev_get_drvdata(dev); |
27eb5ac8 KW |
2038 | char *tmp; |
2039 | int i; | |
2040 | ||
2041 | if (!card) | |
2042 | return -EINVAL; | |
2043 | if (card->state != DEV_STATE_UP) | |
2044 | return -EPERM; | |
2045 | i = simple_strtoul(buf, &tmp, 16); | |
2046 | if (i == 1) | |
2047 | lcs_schedule_recovery(card); | |
2048 | return count; | |
2049 | } | |
2050 | ||
2051 | static DEVICE_ATTR(recover, 0200, NULL, lcs_dev_recover_store); | |
2052 | ||
1da177e4 LT |
2053 | static struct attribute * lcs_attrs[] = { |
2054 | &dev_attr_portno.attr, | |
2055 | &dev_attr_type.attr, | |
2056 | &dev_attr_lancmd_timeout.attr, | |
27eb5ac8 | 2057 | &dev_attr_recover.attr, |
1da177e4 LT |
2058 | NULL, |
2059 | }; | |
2060 | ||
2061 | static struct attribute_group lcs_attr_group = { | |
2062 | .attrs = lcs_attrs, | |
2063 | }; | |
2064 | ||
2065 | /** | |
2066 | * lcs_probe_device is called on establishing a new ccwgroup_device. | |
2067 | */ | |
2068 | static int | |
2069 | lcs_probe_device(struct ccwgroup_device *ccwgdev) | |
2070 | { | |
2071 | struct lcs_card *card; | |
2072 | int ret; | |
2073 | ||
2074 | if (!get_device(&ccwgdev->dev)) | |
2075 | return -ENODEV; | |
2076 | ||
2077 | LCS_DBF_TEXT(2, setup, "add_dev"); | |
2078 | card = lcs_alloc_card(); | |
2079 | if (!card) { | |
6b648063 | 2080 | LCS_DBF_TEXT_(2, setup, " rc%d", -ENOMEM); |
1da177e4 LT |
2081 | put_device(&ccwgdev->dev); |
2082 | return -ENOMEM; | |
2083 | } | |
2084 | ret = sysfs_create_group(&ccwgdev->dev.kobj, &lcs_attr_group); | |
2085 | if (ret) { | |
1da177e4 LT |
2086 | lcs_free_card(card); |
2087 | put_device(&ccwgdev->dev); | |
2088 | return ret; | |
2089 | } | |
dff59b64 | 2090 | dev_set_drvdata(&ccwgdev->dev, card); |
1da177e4 LT |
2091 | ccwgdev->cdev[0]->handler = lcs_irq; |
2092 | ccwgdev->cdev[1]->handler = lcs_irq; | |
27eb5ac8 | 2093 | card->gdev = ccwgdev; |
4927b3f7 | 2094 | INIT_WORK(&card->kernel_thread_starter, lcs_start_kernel_thread); |
27eb5ac8 KW |
2095 | card->thread_start_mask = 0; |
2096 | card->thread_allowed_mask = 0; | |
2097 | card->thread_running_mask = 0; | |
1da177e4 LT |
2098 | return 0; |
2099 | } | |
2100 | ||
2101 | static int | |
2102 | lcs_register_netdev(struct ccwgroup_device *ccwgdev) | |
2103 | { | |
2104 | struct lcs_card *card; | |
2105 | ||
2106 | LCS_DBF_TEXT(2, setup, "regnetdv"); | |
dff59b64 | 2107 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2108 | if (card->dev->reg_state != NETREG_UNINITIALIZED) |
2109 | return 0; | |
2110 | SET_NETDEV_DEV(card->dev, &ccwgdev->dev); | |
2111 | return register_netdev(card->dev); | |
2112 | } | |
2113 | ||
2114 | /** | |
2115 | * lcs_new_device will be called by setting the group device online. | |
2116 | */ | |
0e0b46d8 FB |
2117 | static const struct net_device_ops lcs_netdev_ops = { |
2118 | .ndo_open = lcs_open_device, | |
2119 | .ndo_stop = lcs_stop_device, | |
2120 | .ndo_get_stats = lcs_getstats, | |
2121 | .ndo_start_xmit = lcs_start_xmit, | |
2122 | }; | |
2123 | ||
2124 | static const struct net_device_ops lcs_mc_netdev_ops = { | |
2125 | .ndo_open = lcs_open_device, | |
2126 | .ndo_stop = lcs_stop_device, | |
2127 | .ndo_get_stats = lcs_getstats, | |
2128 | .ndo_start_xmit = lcs_start_xmit, | |
2129 | .ndo_set_multicast_list = lcs_set_multicast_list, | |
2130 | }; | |
1da177e4 LT |
2131 | |
2132 | static int | |
2133 | lcs_new_device(struct ccwgroup_device *ccwgdev) | |
2134 | { | |
2135 | struct lcs_card *card; | |
2136 | struct net_device *dev=NULL; | |
2137 | enum lcs_dev_states recover_state; | |
2138 | int rc; | |
2139 | ||
dff59b64 | 2140 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2141 | if (!card) |
2142 | return -ENODEV; | |
2143 | ||
2144 | LCS_DBF_TEXT(2, setup, "newdev"); | |
2145 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2146 | card->read.ccwdev = ccwgdev->cdev[0]; | |
2147 | card->write.ccwdev = ccwgdev->cdev[1]; | |
2148 | ||
2149 | recover_state = card->state; | |
d816d423 KDW |
2150 | rc = ccw_device_set_online(card->read.ccwdev); |
2151 | if (rc) | |
2152 | goto out_err; | |
2153 | rc = ccw_device_set_online(card->write.ccwdev); | |
2154 | if (rc) | |
2155 | goto out_werr; | |
1da177e4 LT |
2156 | |
2157 | LCS_DBF_TEXT(3, setup, "lcsnewdv"); | |
2158 | ||
2159 | lcs_setup_card(card); | |
2160 | rc = lcs_detect(card); | |
2161 | if (rc) { | |
2162 | LCS_DBF_TEXT(2, setup, "dtctfail"); | |
c99fc5da KW |
2163 | dev_err(&card->dev->dev, |
2164 | "Detecting a network adapter for LCS devices" | |
2165 | " failed with rc=%d (0x%x)\n", rc, rc); | |
1da177e4 LT |
2166 | lcs_stopcard(card); |
2167 | goto out; | |
2168 | } | |
2169 | if (card->dev) { | |
2170 | LCS_DBF_TEXT(2, setup, "samedev"); | |
2171 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2172 | goto netdev_out; | |
2173 | } | |
2174 | switch (card->lan_type) { | |
2175 | #ifdef CONFIG_NET_ETHERNET | |
2176 | case LCS_FRAME_TYPE_ENET: | |
2177 | card->lan_type_trans = eth_type_trans; | |
2178 | dev = alloc_etherdev(0); | |
2179 | break; | |
2180 | #endif | |
2181 | #ifdef CONFIG_TR | |
2182 | case LCS_FRAME_TYPE_TR: | |
2183 | card->lan_type_trans = tr_type_trans; | |
2184 | dev = alloc_trdev(0); | |
2185 | break; | |
2186 | #endif | |
2187 | #ifdef CONFIG_FDDI | |
2188 | case LCS_FRAME_TYPE_FDDI: | |
2189 | card->lan_type_trans = fddi_type_trans; | |
2190 | dev = alloc_fddidev(0); | |
2191 | break; | |
2192 | #endif | |
2193 | default: | |
2194 | LCS_DBF_TEXT(3, setup, "errinit"); | |
c99fc5da | 2195 | pr_err(" Initialization failed\n"); |
1da177e4 LT |
2196 | goto out; |
2197 | } | |
2198 | if (!dev) | |
2199 | goto out; | |
2200 | card->dev = dev; | |
ad660e2f | 2201 | card->dev->ml_priv = card; |
0e0b46d8 | 2202 | card->dev->netdev_ops = &lcs_netdev_ops; |
1da177e4 LT |
2203 | memcpy(card->dev->dev_addr, card->mac, LCS_MAC_LENGTH); |
2204 | #ifdef CONFIG_IP_MULTICAST | |
2205 | if (!lcs_check_multicast_support(card)) | |
0e0b46d8 | 2206 | card->dev->netdev_ops = &lcs_mc_netdev_ops; |
1da177e4 | 2207 | #endif |
b5f9d55b | 2208 | netdev_out: |
1da177e4 LT |
2209 | lcs_set_allowed_threads(card,0xffffffff); |
2210 | if (recover_state == DEV_STATE_RECOVER) { | |
2211 | lcs_set_multicast_list(card->dev); | |
2212 | card->dev->flags |= IFF_UP; | |
27eb5ac8 | 2213 | netif_carrier_on(card->dev); |
1da177e4 LT |
2214 | netif_wake_queue(card->dev); |
2215 | card->state = DEV_STATE_UP; | |
b5f9d55b | 2216 | } else { |
1da177e4 | 2217 | lcs_stopcard(card); |
b5f9d55b | 2218 | } |
1da177e4 | 2219 | |
b5f9d55b FP |
2220 | if (lcs_register_netdev(ccwgdev) != 0) |
2221 | goto out; | |
2222 | ||
2223 | /* Print out supported assists: IPv6 */ | |
c99fc5da KW |
2224 | pr_info("LCS device %s %s IPv6 support\n", card->dev->name, |
2225 | (card->ip_assists_supported & LCS_IPASS_IPV6_SUPPORT) ? | |
2226 | "with" : "without"); | |
b5f9d55b | 2227 | /* Print out supported assist: Multicast */ |
c99fc5da KW |
2228 | pr_info("LCS device %s %s Multicast support\n", card->dev->name, |
2229 | (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) ? | |
2230 | "with" : "without"); | |
1da177e4 LT |
2231 | return 0; |
2232 | out: | |
2233 | ||
1da177e4 | 2234 | ccw_device_set_offline(card->write.ccwdev); |
d816d423 KDW |
2235 | out_werr: |
2236 | ccw_device_set_offline(card->read.ccwdev); | |
2237 | out_err: | |
1da177e4 LT |
2238 | return -ENODEV; |
2239 | } | |
2240 | ||
2241 | /** | |
2242 | * lcs_shutdown_device, called when setting the group device offline. | |
2243 | */ | |
2244 | static int | |
27eb5ac8 | 2245 | __lcs_shutdown_device(struct ccwgroup_device *ccwgdev, int recovery_mode) |
1da177e4 LT |
2246 | { |
2247 | struct lcs_card *card; | |
2248 | enum lcs_dev_states recover_state; | |
2249 | int ret; | |
2250 | ||
2251 | LCS_DBF_TEXT(3, setup, "shtdndev"); | |
dff59b64 | 2252 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2253 | if (!card) |
2254 | return -ENODEV; | |
27eb5ac8 KW |
2255 | if (recovery_mode == 0) { |
2256 | lcs_set_allowed_threads(card, 0); | |
2257 | if (lcs_wait_for_threads(card, LCS_SET_MC_THREAD)) | |
2258 | return -ERESTARTSYS; | |
2259 | } | |
1da177e4 LT |
2260 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); |
2261 | recover_state = card->state; | |
2262 | ||
2263 | ret = lcs_stop_device(card->dev); | |
2264 | ret = ccw_device_set_offline(card->read.ccwdev); | |
2265 | ret = ccw_device_set_offline(card->write.ccwdev); | |
2266 | if (recover_state == DEV_STATE_UP) { | |
2267 | card->state = DEV_STATE_RECOVER; | |
2268 | } | |
2269 | if (ret) | |
2270 | return ret; | |
2271 | return 0; | |
2272 | } | |
2273 | ||
27eb5ac8 KW |
2274 | static int |
2275 | lcs_shutdown_device(struct ccwgroup_device *ccwgdev) | |
2276 | { | |
2277 | return __lcs_shutdown_device(ccwgdev, 0); | |
2278 | } | |
2279 | ||
2280 | /** | |
2281 | * drive lcs recovery after startup and startlan initiated by Lan Gateway | |
2282 | */ | |
2283 | static int | |
2284 | lcs_recovery(void *ptr) | |
2285 | { | |
2286 | struct lcs_card *card; | |
2287 | struct ccwgroup_device *gdev; | |
2288 | int rc; | |
2289 | ||
2290 | card = (struct lcs_card *) ptr; | |
27eb5ac8 KW |
2291 | |
2292 | LCS_DBF_TEXT(4, trace, "recover1"); | |
2293 | if (!lcs_do_run_thread(card, LCS_RECOVERY_THREAD)) | |
2294 | return 0; | |
2295 | LCS_DBF_TEXT(4, trace, "recover2"); | |
2296 | gdev = card->gdev; | |
c99fc5da KW |
2297 | dev_warn(&gdev->dev, |
2298 | "A recovery process has been started for the LCS device\n"); | |
27eb5ac8 KW |
2299 | rc = __lcs_shutdown_device(gdev, 1); |
2300 | rc = lcs_new_device(gdev); | |
2301 | if (!rc) | |
c99fc5da KW |
2302 | pr_info("Device %s successfully recovered!\n", |
2303 | card->dev->name); | |
27eb5ac8 | 2304 | else |
c99fc5da KW |
2305 | pr_info("Device %s could not be recovered!\n", |
2306 | card->dev->name); | |
27eb5ac8 KW |
2307 | lcs_clear_thread_running_bit(card, LCS_RECOVERY_THREAD); |
2308 | return 0; | |
2309 | } | |
2310 | ||
1da177e4 LT |
2311 | /** |
2312 | * lcs_remove_device, free buffers and card | |
2313 | */ | |
2314 | static void | |
2315 | lcs_remove_device(struct ccwgroup_device *ccwgdev) | |
2316 | { | |
2317 | struct lcs_card *card; | |
2318 | ||
dff59b64 | 2319 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2320 | if (!card) |
2321 | return; | |
2322 | ||
1da177e4 LT |
2323 | LCS_DBF_TEXT(3, setup, "remdev"); |
2324 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2325 | if (ccwgdev->state == CCWGROUP_ONLINE) { | |
2326 | lcs_shutdown_device(ccwgdev); | |
2327 | } | |
2328 | if (card->dev) | |
2329 | unregister_netdev(card->dev); | |
2330 | sysfs_remove_group(&ccwgdev->dev.kobj, &lcs_attr_group); | |
2331 | lcs_cleanup_card(card); | |
2332 | lcs_free_card(card); | |
2333 | put_device(&ccwgdev->dev); | |
2334 | } | |
2335 | ||
cbb2aec3 KDW |
2336 | static int lcs_pm_suspend(struct lcs_card *card) |
2337 | { | |
2338 | if (card->dev) | |
2339 | netif_device_detach(card->dev); | |
2340 | lcs_set_allowed_threads(card, 0); | |
2341 | lcs_wait_for_threads(card, 0xffffffff); | |
2342 | if (card->state != DEV_STATE_DOWN) | |
2343 | __lcs_shutdown_device(card->gdev, 1); | |
2344 | return 0; | |
2345 | } | |
2346 | ||
2347 | static int lcs_pm_resume(struct lcs_card *card) | |
2348 | { | |
2349 | int rc = 0; | |
2350 | ||
2351 | if (card->state == DEV_STATE_RECOVER) | |
2352 | rc = lcs_new_device(card->gdev); | |
2353 | if (card->dev) | |
2354 | netif_device_attach(card->dev); | |
2355 | if (rc) { | |
2356 | dev_warn(&card->gdev->dev, "The lcs device driver " | |
2357 | "failed to recover the device\n"); | |
2358 | } | |
2359 | return rc; | |
2360 | } | |
2361 | ||
2362 | static int lcs_prepare(struct ccwgroup_device *gdev) | |
2363 | { | |
2364 | return 0; | |
2365 | } | |
2366 | ||
2367 | static void lcs_complete(struct ccwgroup_device *gdev) | |
2368 | { | |
2369 | return; | |
2370 | } | |
2371 | ||
2372 | static int lcs_freeze(struct ccwgroup_device *gdev) | |
2373 | { | |
2374 | struct lcs_card *card = dev_get_drvdata(&gdev->dev); | |
2375 | return lcs_pm_suspend(card); | |
2376 | } | |
2377 | ||
2378 | static int lcs_thaw(struct ccwgroup_device *gdev) | |
2379 | { | |
2380 | struct lcs_card *card = dev_get_drvdata(&gdev->dev); | |
2381 | return lcs_pm_resume(card); | |
2382 | } | |
2383 | ||
2384 | static int lcs_restore(struct ccwgroup_device *gdev) | |
2385 | { | |
2386 | struct lcs_card *card = dev_get_drvdata(&gdev->dev); | |
2387 | return lcs_pm_resume(card); | |
2388 | } | |
2389 | ||
0ca8cc6f UB |
2390 | static struct ccw_device_id lcs_ids[] = { |
2391 | {CCW_DEVICE(0x3088, 0x08), .driver_info = lcs_channel_type_parallel}, | |
2392 | {CCW_DEVICE(0x3088, 0x1f), .driver_info = lcs_channel_type_2216}, | |
2393 | {CCW_DEVICE(0x3088, 0x60), .driver_info = lcs_channel_type_osa2}, | |
2394 | {}, | |
2395 | }; | |
2396 | MODULE_DEVICE_TABLE(ccw, lcs_ids); | |
2397 | ||
2398 | static struct ccw_driver lcs_ccw_driver = { | |
3bda058b SO |
2399 | .driver = { |
2400 | .owner = THIS_MODULE, | |
2401 | .name = "lcs", | |
2402 | }, | |
0ca8cc6f UB |
2403 | .ids = lcs_ids, |
2404 | .probe = ccwgroup_probe_ccwdev, | |
2405 | .remove = ccwgroup_remove_ccwdev, | |
2406 | }; | |
2407 | ||
1da177e4 LT |
2408 | /** |
2409 | * LCS ccwgroup driver registration | |
2410 | */ | |
2411 | static struct ccwgroup_driver lcs_group_driver = { | |
3c190c51 SO |
2412 | .driver = { |
2413 | .owner = THIS_MODULE, | |
2414 | .name = "lcs", | |
2415 | }, | |
1da177e4 LT |
2416 | .max_slaves = 2, |
2417 | .driver_id = 0xD3C3E2, | |
2418 | .probe = lcs_probe_device, | |
2419 | .remove = lcs_remove_device, | |
2420 | .set_online = lcs_new_device, | |
2421 | .set_offline = lcs_shutdown_device, | |
cbb2aec3 KDW |
2422 | .prepare = lcs_prepare, |
2423 | .complete = lcs_complete, | |
2424 | .freeze = lcs_freeze, | |
2425 | .thaw = lcs_thaw, | |
2426 | .restore = lcs_restore, | |
1da177e4 LT |
2427 | }; |
2428 | ||
0ca8cc6f UB |
2429 | static ssize_t |
2430 | lcs_driver_group_store(struct device_driver *ddrv, const char *buf, | |
2431 | size_t count) | |
2432 | { | |
2433 | int err; | |
2434 | err = ccwgroup_create_from_string(lcs_root_dev, | |
2435 | lcs_group_driver.driver_id, | |
2436 | &lcs_ccw_driver, 2, buf); | |
2437 | return err ? err : count; | |
2438 | } | |
2439 | ||
2440 | static DRIVER_ATTR(group, 0200, NULL, lcs_driver_group_store); | |
2441 | ||
2442 | static struct attribute *lcs_group_attrs[] = { | |
2443 | &driver_attr_group.attr, | |
2444 | NULL, | |
2445 | }; | |
2446 | ||
2447 | static struct attribute_group lcs_group_attr_group = { | |
2448 | .attrs = lcs_group_attrs, | |
2449 | }; | |
2450 | ||
302689ac | 2451 | static const struct attribute_group *lcs_group_attr_groups[] = { |
0ca8cc6f UB |
2452 | &lcs_group_attr_group, |
2453 | NULL, | |
2454 | }; | |
2455 | ||
1da177e4 LT |
2456 | /** |
2457 | * LCS Module/Kernel initialization function | |
2458 | */ | |
2459 | static int | |
2460 | __init lcs_init_module(void) | |
2461 | { | |
2462 | int rc; | |
2463 | ||
c99fc5da | 2464 | pr_info("Loading %s\n", version); |
1da177e4 LT |
2465 | rc = lcs_register_debug_facility(); |
2466 | LCS_DBF_TEXT(0, setup, "lcsinit"); | |
0ca8cc6f UB |
2467 | if (rc) |
2468 | goto out_err; | |
2469 | lcs_root_dev = root_device_register("lcs"); | |
2470 | rc = IS_ERR(lcs_root_dev) ? PTR_ERR(lcs_root_dev) : 0; | |
2471 | if (rc) | |
2472 | goto register_err; | |
2473 | rc = ccw_driver_register(&lcs_ccw_driver); | |
2474 | if (rc) | |
2475 | goto ccw_err; | |
2476 | lcs_group_driver.driver.groups = lcs_group_attr_groups; | |
2477 | rc = ccwgroup_driver_register(&lcs_group_driver); | |
2478 | if (rc) | |
2479 | goto ccwgroup_err; | |
1da177e4 | 2480 | return 0; |
0ca8cc6f UB |
2481 | |
2482 | ccwgroup_err: | |
2483 | ccw_driver_unregister(&lcs_ccw_driver); | |
2484 | ccw_err: | |
2485 | root_device_unregister(lcs_root_dev); | |
2486 | register_err: | |
2487 | lcs_unregister_debug_facility(); | |
2488 | out_err: | |
2489 | pr_err("Initializing the lcs device driver failed\n"); | |
2490 | return rc; | |
1da177e4 LT |
2491 | } |
2492 | ||
2493 | ||
2494 | /** | |
2495 | * LCS module cleanup function | |
2496 | */ | |
2497 | static void | |
2498 | __exit lcs_cleanup_module(void) | |
2499 | { | |
c99fc5da | 2500 | pr_info("Terminating lcs module.\n"); |
1da177e4 | 2501 | LCS_DBF_TEXT(0, trace, "cleanup"); |
0ca8cc6f UB |
2502 | driver_remove_file(&lcs_group_driver.driver, |
2503 | &driver_attr_group); | |
2504 | ccwgroup_driver_unregister(&lcs_group_driver); | |
2505 | ccw_driver_unregister(&lcs_ccw_driver); | |
2506 | root_device_unregister(lcs_root_dev); | |
1da177e4 LT |
2507 | lcs_unregister_debug_facility(); |
2508 | } | |
2509 | ||
2510 | module_init(lcs_init_module); | |
2511 | module_exit(lcs_cleanup_module); | |
2512 | ||
1387780f | 2513 | MODULE_AUTHOR("Frank Pavlic <fpavlic@de.ibm.com>"); |
1da177e4 LT |
2514 | MODULE_LICENSE("GPL"); |
2515 |