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1da177e4 LT |
1 | /* |
2 | * linux/drivers/s390/net/lcs.c | |
3 | * | |
4 | * Linux for S/390 Lan Channel Station Network Driver | |
5 | * | |
6 | * Copyright (C) 1999-2001 IBM Deutschland Entwicklung GmbH, | |
7 | * IBM Corporation | |
8 | * Author(s): Original Code written by | |
9 | * DJ Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) | |
10 | * Rewritten by | |
1387780f | 11 | * Frank Pavlic (fpavlic@de.ibm.com) and |
1da177e4 LT |
12 | * Martin Schwidefsky <schwidefsky@de.ibm.com> |
13 | * | |
1da177e4 LT |
14 | * This program is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU General Public License as published by | |
16 | * the Free Software Foundation; either version 2, or (at your option) | |
17 | * any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License | |
25 | * along with this program; if not, write to the Free Software | |
26 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
27 | */ | |
28 | ||
29 | #include <linux/module.h> | |
30 | #include <linux/if.h> | |
31 | #include <linux/netdevice.h> | |
32 | #include <linux/etherdevice.h> | |
33 | #include <linux/trdevice.h> | |
34 | #include <linux/fddidevice.h> | |
35 | #include <linux/inetdevice.h> | |
36 | #include <linux/in.h> | |
37 | #include <linux/igmp.h> | |
38 | #include <linux/delay.h> | |
39 | #include <net/arp.h> | |
40 | #include <net/ip.h> | |
41 | ||
42 | #include <asm/debug.h> | |
43 | #include <asm/idals.h> | |
44 | #include <asm/timex.h> | |
45 | #include <linux/device.h> | |
46 | #include <asm/ccwgroup.h> | |
47 | ||
48 | #include "lcs.h" | |
49 | #include "cu3088.h" | |
50 | ||
51 | ||
52 | #if !defined(CONFIG_NET_ETHERNET) && \ | |
53 | !defined(CONFIG_TR) && !defined(CONFIG_FDDI) | |
54 | #error Cannot compile lcs.c without some net devices switched on. | |
55 | #endif | |
56 | ||
9163bb2e UB |
57 | #define PRINTK_HEADER " lcs: " |
58 | ||
1da177e4 LT |
59 | /** |
60 | * initialization string for output | |
61 | */ | |
1da177e4 | 62 | |
e018ba1f | 63 | static char version[] __initdata = "LCS driver"; |
1da177e4 LT |
64 | static char debug_buffer[255]; |
65 | ||
66 | /** | |
67 | * Some prototypes. | |
68 | */ | |
69 | static void lcs_tasklet(unsigned long); | |
4927b3f7 | 70 | static void lcs_start_kernel_thread(struct work_struct *); |
1da177e4 LT |
71 | static void lcs_get_frames_cb(struct lcs_channel *, struct lcs_buffer *); |
72 | static int lcs_send_delipm(struct lcs_card *, struct lcs_ipm_list *); | |
27eb5ac8 | 73 | static int lcs_recovery(void *ptr); |
1da177e4 LT |
74 | |
75 | /** | |
76 | * Debug Facility Stuff | |
77 | */ | |
78 | static debug_info_t *lcs_dbf_setup; | |
79 | static debug_info_t *lcs_dbf_trace; | |
80 | ||
81 | /** | |
82 | * LCS Debug Facility functions | |
83 | */ | |
84 | static void | |
85 | lcs_unregister_debug_facility(void) | |
86 | { | |
87 | if (lcs_dbf_setup) | |
88 | debug_unregister(lcs_dbf_setup); | |
89 | if (lcs_dbf_trace) | |
90 | debug_unregister(lcs_dbf_trace); | |
91 | } | |
92 | ||
93 | static int | |
94 | lcs_register_debug_facility(void) | |
95 | { | |
66a464db | 96 | lcs_dbf_setup = debug_register("lcs_setup", 2, 1, 8); |
164b0fb1 | 97 | lcs_dbf_trace = debug_register("lcs_trace", 4, 1, 8); |
1da177e4 LT |
98 | if (lcs_dbf_setup == NULL || lcs_dbf_trace == NULL) { |
99 | PRINT_ERR("Not enough memory for debug facility.\n"); | |
100 | lcs_unregister_debug_facility(); | |
101 | return -ENOMEM; | |
102 | } | |
103 | debug_register_view(lcs_dbf_setup, &debug_hex_ascii_view); | |
0d613a27 | 104 | debug_set_level(lcs_dbf_setup, 2); |
1da177e4 | 105 | debug_register_view(lcs_dbf_trace, &debug_hex_ascii_view); |
0d613a27 | 106 | debug_set_level(lcs_dbf_trace, 2); |
1da177e4 LT |
107 | return 0; |
108 | } | |
109 | ||
110 | /** | |
111 | * Allocate io buffers. | |
112 | */ | |
113 | static int | |
114 | lcs_alloc_channel(struct lcs_channel *channel) | |
115 | { | |
116 | int cnt; | |
117 | ||
118 | LCS_DBF_TEXT(2, setup, "ichalloc"); | |
119 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
120 | /* alloc memory fo iobuffer */ | |
88abaab4 ES |
121 | channel->iob[cnt].data = |
122 | kzalloc(LCS_IOBUFFERSIZE, GFP_DMA | GFP_KERNEL); | |
1da177e4 LT |
123 | if (channel->iob[cnt].data == NULL) |
124 | break; | |
9163bb2e | 125 | channel->iob[cnt].state = LCS_BUF_STATE_EMPTY; |
1da177e4 LT |
126 | } |
127 | if (cnt < LCS_NUM_BUFFS) { | |
128 | /* Not all io buffers could be allocated. */ | |
129 | LCS_DBF_TEXT(2, setup, "echalloc"); | |
130 | while (cnt-- > 0) | |
131 | kfree(channel->iob[cnt].data); | |
132 | return -ENOMEM; | |
133 | } | |
134 | return 0; | |
135 | } | |
136 | ||
137 | /** | |
138 | * Free io buffers. | |
139 | */ | |
140 | static void | |
141 | lcs_free_channel(struct lcs_channel *channel) | |
142 | { | |
143 | int cnt; | |
144 | ||
145 | LCS_DBF_TEXT(2, setup, "ichfree"); | |
146 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
17fd682e | 147 | kfree(channel->iob[cnt].data); |
1da177e4 LT |
148 | channel->iob[cnt].data = NULL; |
149 | } | |
150 | } | |
151 | ||
152 | /* | |
153 | * Cleanup channel. | |
154 | */ | |
155 | static void | |
156 | lcs_cleanup_channel(struct lcs_channel *channel) | |
157 | { | |
158 | LCS_DBF_TEXT(3, setup, "cleanch"); | |
159 | /* Kill write channel tasklets. */ | |
160 | tasklet_kill(&channel->irq_tasklet); | |
161 | /* Free channel buffers. */ | |
162 | lcs_free_channel(channel); | |
163 | } | |
164 | ||
165 | /** | |
166 | * LCS free memory for card and channels. | |
167 | */ | |
168 | static void | |
169 | lcs_free_card(struct lcs_card *card) | |
170 | { | |
171 | LCS_DBF_TEXT(2, setup, "remcard"); | |
172 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
173 | kfree(card); | |
174 | } | |
175 | ||
176 | /** | |
177 | * LCS alloc memory for card and channels | |
178 | */ | |
179 | static struct lcs_card * | |
180 | lcs_alloc_card(void) | |
181 | { | |
182 | struct lcs_card *card; | |
183 | int rc; | |
184 | ||
185 | LCS_DBF_TEXT(2, setup, "alloclcs"); | |
186 | ||
88abaab4 | 187 | card = kzalloc(sizeof(struct lcs_card), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
188 | if (card == NULL) |
189 | return NULL; | |
1da177e4 LT |
190 | card->lan_type = LCS_FRAME_TYPE_AUTO; |
191 | card->pkt_seq = 0; | |
192 | card->lancmd_timeout = LCS_LANCMD_TIMEOUT_DEFAULT; | |
193 | /* Allocate io buffers for the read channel. */ | |
194 | rc = lcs_alloc_channel(&card->read); | |
195 | if (rc){ | |
196 | LCS_DBF_TEXT(2, setup, "iccwerr"); | |
197 | lcs_free_card(card); | |
198 | return NULL; | |
199 | } | |
200 | /* Allocate io buffers for the write channel. */ | |
201 | rc = lcs_alloc_channel(&card->write); | |
202 | if (rc) { | |
203 | LCS_DBF_TEXT(2, setup, "iccwerr"); | |
204 | lcs_cleanup_channel(&card->read); | |
205 | lcs_free_card(card); | |
206 | return NULL; | |
207 | } | |
208 | ||
209 | #ifdef CONFIG_IP_MULTICAST | |
210 | INIT_LIST_HEAD(&card->ipm_list); | |
211 | #endif | |
212 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
213 | return card; | |
214 | } | |
215 | ||
216 | /* | |
217 | * Setup read channel. | |
218 | */ | |
219 | static void | |
220 | lcs_setup_read_ccws(struct lcs_card *card) | |
221 | { | |
222 | int cnt; | |
223 | ||
224 | LCS_DBF_TEXT(2, setup, "ireadccw"); | |
225 | /* Setup read ccws. */ | |
226 | memset(card->read.ccws, 0, sizeof (struct ccw1) * (LCS_NUM_BUFFS + 1)); | |
227 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
228 | card->read.ccws[cnt].cmd_code = LCS_CCW_READ; | |
229 | card->read.ccws[cnt].count = LCS_IOBUFFERSIZE; | |
230 | card->read.ccws[cnt].flags = | |
231 | CCW_FLAG_CC | CCW_FLAG_SLI | CCW_FLAG_PCI; | |
232 | /* | |
233 | * Note: we have allocated the buffer with GFP_DMA, so | |
234 | * we do not need to do set_normalized_cda. | |
235 | */ | |
236 | card->read.ccws[cnt].cda = | |
237 | (__u32) __pa(card->read.iob[cnt].data); | |
238 | ((struct lcs_header *) | |
239 | card->read.iob[cnt].data)->offset = LCS_ILLEGAL_OFFSET; | |
240 | card->read.iob[cnt].callback = lcs_get_frames_cb; | |
9163bb2e | 241 | card->read.iob[cnt].state = LCS_BUF_STATE_READY; |
1da177e4 LT |
242 | card->read.iob[cnt].count = LCS_IOBUFFERSIZE; |
243 | } | |
244 | card->read.ccws[0].flags &= ~CCW_FLAG_PCI; | |
245 | card->read.ccws[LCS_NUM_BUFFS - 1].flags &= ~CCW_FLAG_PCI; | |
246 | card->read.ccws[LCS_NUM_BUFFS - 1].flags |= CCW_FLAG_SUSPEND; | |
247 | /* Last ccw is a tic (transfer in channel). */ | |
248 | card->read.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER; | |
249 | card->read.ccws[LCS_NUM_BUFFS].cda = | |
250 | (__u32) __pa(card->read.ccws); | |
251 | /* Setg initial state of the read channel. */ | |
9163bb2e | 252 | card->read.state = LCS_CH_STATE_INIT; |
1da177e4 LT |
253 | |
254 | card->read.io_idx = 0; | |
255 | card->read.buf_idx = 0; | |
256 | } | |
257 | ||
258 | static void | |
259 | lcs_setup_read(struct lcs_card *card) | |
260 | { | |
261 | LCS_DBF_TEXT(3, setup, "initread"); | |
262 | ||
263 | lcs_setup_read_ccws(card); | |
264 | /* Initialize read channel tasklet. */ | |
265 | card->read.irq_tasklet.data = (unsigned long) &card->read; | |
266 | card->read.irq_tasklet.func = lcs_tasklet; | |
267 | /* Initialize waitqueue. */ | |
268 | init_waitqueue_head(&card->read.wait_q); | |
269 | } | |
270 | ||
271 | /* | |
272 | * Setup write channel. | |
273 | */ | |
274 | static void | |
275 | lcs_setup_write_ccws(struct lcs_card *card) | |
276 | { | |
277 | int cnt; | |
278 | ||
279 | LCS_DBF_TEXT(3, setup, "iwritccw"); | |
280 | /* Setup write ccws. */ | |
281 | memset(card->write.ccws, 0, sizeof(struct ccw1) * LCS_NUM_BUFFS + 1); | |
282 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
283 | card->write.ccws[cnt].cmd_code = LCS_CCW_WRITE; | |
284 | card->write.ccws[cnt].count = 0; | |
285 | card->write.ccws[cnt].flags = | |
286 | CCW_FLAG_SUSPEND | CCW_FLAG_CC | CCW_FLAG_SLI; | |
287 | /* | |
288 | * Note: we have allocated the buffer with GFP_DMA, so | |
289 | * we do not need to do set_normalized_cda. | |
290 | */ | |
291 | card->write.ccws[cnt].cda = | |
292 | (__u32) __pa(card->write.iob[cnt].data); | |
293 | } | |
294 | /* Last ccw is a tic (transfer in channel). */ | |
295 | card->write.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER; | |
296 | card->write.ccws[LCS_NUM_BUFFS].cda = | |
297 | (__u32) __pa(card->write.ccws); | |
298 | /* Set initial state of the write channel. */ | |
9163bb2e | 299 | card->read.state = LCS_CH_STATE_INIT; |
1da177e4 LT |
300 | |
301 | card->write.io_idx = 0; | |
302 | card->write.buf_idx = 0; | |
303 | } | |
304 | ||
305 | static void | |
306 | lcs_setup_write(struct lcs_card *card) | |
307 | { | |
308 | LCS_DBF_TEXT(3, setup, "initwrit"); | |
309 | ||
310 | lcs_setup_write_ccws(card); | |
311 | /* Initialize write channel tasklet. */ | |
312 | card->write.irq_tasklet.data = (unsigned long) &card->write; | |
313 | card->write.irq_tasklet.func = lcs_tasklet; | |
314 | /* Initialize waitqueue. */ | |
315 | init_waitqueue_head(&card->write.wait_q); | |
316 | } | |
317 | ||
318 | static void | |
319 | lcs_set_allowed_threads(struct lcs_card *card, unsigned long threads) | |
320 | { | |
321 | unsigned long flags; | |
322 | ||
323 | spin_lock_irqsave(&card->mask_lock, flags); | |
324 | card->thread_allowed_mask = threads; | |
325 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
326 | wake_up(&card->wait_q); | |
327 | } | |
328 | static inline int | |
329 | lcs_threads_running(struct lcs_card *card, unsigned long threads) | |
330 | { | |
331 | unsigned long flags; | |
332 | int rc = 0; | |
333 | ||
334 | spin_lock_irqsave(&card->mask_lock, flags); | |
335 | rc = (card->thread_running_mask & threads); | |
336 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
337 | return rc; | |
338 | } | |
339 | ||
340 | static int | |
341 | lcs_wait_for_threads(struct lcs_card *card, unsigned long threads) | |
342 | { | |
343 | return wait_event_interruptible(card->wait_q, | |
344 | lcs_threads_running(card, threads) == 0); | |
345 | } | |
346 | ||
347 | static inline int | |
348 | lcs_set_thread_start_bit(struct lcs_card *card, unsigned long thread) | |
349 | { | |
350 | unsigned long flags; | |
351 | ||
352 | spin_lock_irqsave(&card->mask_lock, flags); | |
353 | if ( !(card->thread_allowed_mask & thread) || | |
354 | (card->thread_start_mask & thread) ) { | |
355 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
356 | return -EPERM; | |
357 | } | |
358 | card->thread_start_mask |= thread; | |
359 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
360 | return 0; | |
361 | } | |
362 | ||
363 | static void | |
364 | lcs_clear_thread_running_bit(struct lcs_card *card, unsigned long thread) | |
365 | { | |
366 | unsigned long flags; | |
367 | ||
368 | spin_lock_irqsave(&card->mask_lock, flags); | |
369 | card->thread_running_mask &= ~thread; | |
370 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
371 | wake_up(&card->wait_q); | |
372 | } | |
373 | ||
374 | static inline int | |
375 | __lcs_do_run_thread(struct lcs_card *card, unsigned long thread) | |
376 | { | |
377 | unsigned long flags; | |
378 | int rc = 0; | |
379 | ||
380 | spin_lock_irqsave(&card->mask_lock, flags); | |
381 | if (card->thread_start_mask & thread){ | |
382 | if ((card->thread_allowed_mask & thread) && | |
383 | !(card->thread_running_mask & thread)){ | |
384 | rc = 1; | |
385 | card->thread_start_mask &= ~thread; | |
386 | card->thread_running_mask |= thread; | |
387 | } else | |
388 | rc = -EPERM; | |
389 | } | |
390 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
391 | return rc; | |
392 | } | |
393 | ||
394 | static int | |
395 | lcs_do_run_thread(struct lcs_card *card, unsigned long thread) | |
396 | { | |
397 | int rc = 0; | |
398 | wait_event(card->wait_q, | |
399 | (rc = __lcs_do_run_thread(card, thread)) >= 0); | |
400 | return rc; | |
401 | } | |
402 | ||
403 | static int | |
404 | lcs_do_start_thread(struct lcs_card *card, unsigned long thread) | |
405 | { | |
406 | unsigned long flags; | |
407 | int rc = 0; | |
408 | ||
409 | spin_lock_irqsave(&card->mask_lock, flags); | |
410 | LCS_DBF_TEXT_(4, trace, " %02x%02x%02x", | |
411 | (u8) card->thread_start_mask, | |
412 | (u8) card->thread_allowed_mask, | |
413 | (u8) card->thread_running_mask); | |
414 | rc = (card->thread_start_mask & thread); | |
415 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
416 | return rc; | |
417 | } | |
418 | ||
419 | /** | |
420 | * Initialize channels,card and state machines. | |
421 | */ | |
422 | static void | |
423 | lcs_setup_card(struct lcs_card *card) | |
424 | { | |
425 | LCS_DBF_TEXT(2, setup, "initcard"); | |
426 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
427 | ||
428 | lcs_setup_read(card); | |
429 | lcs_setup_write(card); | |
430 | /* Set cards initial state. */ | |
431 | card->state = DEV_STATE_DOWN; | |
432 | card->tx_buffer = NULL; | |
433 | card->tx_emitted = 0; | |
434 | ||
1da177e4 LT |
435 | init_waitqueue_head(&card->wait_q); |
436 | spin_lock_init(&card->lock); | |
437 | spin_lock_init(&card->ipm_lock); | |
438 | spin_lock_init(&card->mask_lock); | |
439 | #ifdef CONFIG_IP_MULTICAST | |
440 | INIT_LIST_HEAD(&card->ipm_list); | |
441 | #endif | |
442 | INIT_LIST_HEAD(&card->lancmd_waiters); | |
443 | } | |
444 | ||
445 | static inline void | |
446 | lcs_clear_multicast_list(struct lcs_card *card) | |
447 | { | |
448 | #ifdef CONFIG_IP_MULTICAST | |
449 | struct lcs_ipm_list *ipm; | |
450 | unsigned long flags; | |
451 | ||
452 | /* Free multicast list. */ | |
453 | LCS_DBF_TEXT(3, setup, "clmclist"); | |
454 | spin_lock_irqsave(&card->ipm_lock, flags); | |
455 | while (!list_empty(&card->ipm_list)){ | |
456 | ipm = list_entry(card->ipm_list.next, | |
457 | struct lcs_ipm_list, list); | |
458 | list_del(&ipm->list); | |
459 | if (ipm->ipm_state != LCS_IPM_STATE_SET_REQUIRED){ | |
460 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
461 | lcs_send_delipm(card, ipm); | |
462 | spin_lock_irqsave(&card->ipm_lock, flags); | |
463 | } | |
464 | kfree(ipm); | |
465 | } | |
466 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
467 | #endif | |
468 | } | |
469 | /** | |
470 | * Cleanup channels,card and state machines. | |
471 | */ | |
472 | static void | |
473 | lcs_cleanup_card(struct lcs_card *card) | |
474 | { | |
475 | ||
476 | LCS_DBF_TEXT(3, setup, "cleancrd"); | |
477 | LCS_DBF_HEX(2,setup,&card,sizeof(void*)); | |
478 | ||
479 | if (card->dev != NULL) | |
480 | free_netdev(card->dev); | |
481 | /* Cleanup channels. */ | |
482 | lcs_cleanup_channel(&card->write); | |
483 | lcs_cleanup_channel(&card->read); | |
484 | } | |
485 | ||
486 | /** | |
487 | * Start channel. | |
488 | */ | |
489 | static int | |
490 | lcs_start_channel(struct lcs_channel *channel) | |
491 | { | |
492 | unsigned long flags; | |
493 | int rc; | |
494 | ||
495 | LCS_DBF_TEXT_(4,trace,"ssch%s", channel->ccwdev->dev.bus_id); | |
496 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); | |
497 | rc = ccw_device_start(channel->ccwdev, | |
498 | channel->ccws + channel->io_idx, 0, 0, | |
499 | DOIO_DENY_PREFETCH | DOIO_ALLOW_SUSPEND); | |
500 | if (rc == 0) | |
9163bb2e | 501 | channel->state = LCS_CH_STATE_RUNNING; |
1da177e4 LT |
502 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); |
503 | if (rc) { | |
504 | LCS_DBF_TEXT_(4,trace,"essh%s", channel->ccwdev->dev.bus_id); | |
505 | PRINT_ERR("Error in starting channel, rc=%d!\n", rc); | |
506 | } | |
507 | return rc; | |
508 | } | |
509 | ||
510 | static int | |
511 | lcs_clear_channel(struct lcs_channel *channel) | |
512 | { | |
513 | unsigned long flags; | |
514 | int rc; | |
515 | ||
516 | LCS_DBF_TEXT(4,trace,"clearch"); | |
517 | LCS_DBF_TEXT_(4,trace,"%s", channel->ccwdev->dev.bus_id); | |
518 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); | |
519 | rc = ccw_device_clear(channel->ccwdev, (addr_t) channel); | |
520 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
521 | if (rc) { | |
522 | LCS_DBF_TEXT_(4,trace,"ecsc%s", channel->ccwdev->dev.bus_id); | |
523 | return rc; | |
524 | } | |
9163bb2e UB |
525 | wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_CLEARED)); |
526 | channel->state = LCS_CH_STATE_STOPPED; | |
1da177e4 LT |
527 | return rc; |
528 | } | |
529 | ||
530 | ||
531 | /** | |
532 | * Stop channel. | |
533 | */ | |
534 | static int | |
535 | lcs_stop_channel(struct lcs_channel *channel) | |
536 | { | |
537 | unsigned long flags; | |
538 | int rc; | |
539 | ||
9163bb2e | 540 | if (channel->state == LCS_CH_STATE_STOPPED) |
1da177e4 LT |
541 | return 0; |
542 | LCS_DBF_TEXT(4,trace,"haltsch"); | |
543 | LCS_DBF_TEXT_(4,trace,"%s", channel->ccwdev->dev.bus_id); | |
9163bb2e | 544 | channel->state = LCS_CH_STATE_INIT; |
1da177e4 LT |
545 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
546 | rc = ccw_device_halt(channel->ccwdev, (addr_t) channel); | |
547 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
548 | if (rc) { | |
549 | LCS_DBF_TEXT_(4,trace,"ehsc%s", channel->ccwdev->dev.bus_id); | |
550 | return rc; | |
551 | } | |
552 | /* Asynchronous halt initialted. Wait for its completion. */ | |
9163bb2e | 553 | wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_HALTED)); |
1da177e4 LT |
554 | lcs_clear_channel(channel); |
555 | return 0; | |
556 | } | |
557 | ||
558 | /** | |
559 | * start read and write channel | |
560 | */ | |
561 | static int | |
562 | lcs_start_channels(struct lcs_card *card) | |
563 | { | |
564 | int rc; | |
565 | ||
566 | LCS_DBF_TEXT(2, trace, "chstart"); | |
567 | /* start read channel */ | |
568 | rc = lcs_start_channel(&card->read); | |
569 | if (rc) | |
570 | return rc; | |
571 | /* start write channel */ | |
572 | rc = lcs_start_channel(&card->write); | |
573 | if (rc) | |
574 | lcs_stop_channel(&card->read); | |
575 | return rc; | |
576 | } | |
577 | ||
578 | /** | |
579 | * stop read and write channel | |
580 | */ | |
581 | static int | |
582 | lcs_stop_channels(struct lcs_card *card) | |
583 | { | |
584 | LCS_DBF_TEXT(2, trace, "chhalt"); | |
585 | lcs_stop_channel(&card->read); | |
586 | lcs_stop_channel(&card->write); | |
587 | return 0; | |
588 | } | |
589 | ||
590 | /** | |
591 | * Get empty buffer. | |
592 | */ | |
593 | static struct lcs_buffer * | |
594 | __lcs_get_buffer(struct lcs_channel *channel) | |
595 | { | |
596 | int index; | |
597 | ||
598 | LCS_DBF_TEXT(5, trace, "_getbuff"); | |
599 | index = channel->io_idx; | |
600 | do { | |
9163bb2e UB |
601 | if (channel->iob[index].state == LCS_BUF_STATE_EMPTY) { |
602 | channel->iob[index].state = LCS_BUF_STATE_LOCKED; | |
1da177e4 LT |
603 | return channel->iob + index; |
604 | } | |
605 | index = (index + 1) & (LCS_NUM_BUFFS - 1); | |
606 | } while (index != channel->io_idx); | |
607 | return NULL; | |
608 | } | |
609 | ||
610 | static struct lcs_buffer * | |
611 | lcs_get_buffer(struct lcs_channel *channel) | |
612 | { | |
613 | struct lcs_buffer *buffer; | |
614 | unsigned long flags; | |
615 | ||
616 | LCS_DBF_TEXT(5, trace, "getbuff"); | |
617 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); | |
618 | buffer = __lcs_get_buffer(channel); | |
619 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
620 | return buffer; | |
621 | } | |
622 | ||
623 | /** | |
624 | * Resume channel program if the channel is suspended. | |
625 | */ | |
626 | static int | |
627 | __lcs_resume_channel(struct lcs_channel *channel) | |
628 | { | |
629 | int rc; | |
630 | ||
9163bb2e | 631 | if (channel->state != LCS_CH_STATE_SUSPENDED) |
1da177e4 LT |
632 | return 0; |
633 | if (channel->ccws[channel->io_idx].flags & CCW_FLAG_SUSPEND) | |
634 | return 0; | |
635 | LCS_DBF_TEXT_(5, trace, "rsch%s", channel->ccwdev->dev.bus_id); | |
636 | rc = ccw_device_resume(channel->ccwdev); | |
637 | if (rc) { | |
638 | LCS_DBF_TEXT_(4, trace, "ersc%s", channel->ccwdev->dev.bus_id); | |
639 | PRINT_ERR("Error in lcs_resume_channel: rc=%d\n",rc); | |
640 | } else | |
9163bb2e | 641 | channel->state = LCS_CH_STATE_RUNNING; |
1da177e4 LT |
642 | return rc; |
643 | ||
644 | } | |
645 | ||
646 | /** | |
647 | * Make a buffer ready for processing. | |
648 | */ | |
649 | static inline void | |
650 | __lcs_ready_buffer_bits(struct lcs_channel *channel, int index) | |
651 | { | |
652 | int prev, next; | |
653 | ||
654 | LCS_DBF_TEXT(5, trace, "rdybits"); | |
655 | prev = (index - 1) & (LCS_NUM_BUFFS - 1); | |
656 | next = (index + 1) & (LCS_NUM_BUFFS - 1); | |
657 | /* Check if we may clear the suspend bit of this buffer. */ | |
658 | if (channel->ccws[next].flags & CCW_FLAG_SUSPEND) { | |
659 | /* Check if we have to set the PCI bit. */ | |
660 | if (!(channel->ccws[prev].flags & CCW_FLAG_SUSPEND)) | |
661 | /* Suspend bit of the previous buffer is not set. */ | |
662 | channel->ccws[index].flags |= CCW_FLAG_PCI; | |
663 | /* Suspend bit of the next buffer is set. */ | |
664 | channel->ccws[index].flags &= ~CCW_FLAG_SUSPEND; | |
665 | } | |
666 | } | |
667 | ||
668 | static int | |
669 | lcs_ready_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
670 | { | |
671 | unsigned long flags; | |
672 | int index, rc; | |
673 | ||
674 | LCS_DBF_TEXT(5, trace, "rdybuff"); | |
9163bb2e UB |
675 | BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED && |
676 | buffer->state != LCS_BUF_STATE_PROCESSED); | |
1da177e4 | 677 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
9163bb2e | 678 | buffer->state = LCS_BUF_STATE_READY; |
1da177e4 LT |
679 | index = buffer - channel->iob; |
680 | /* Set length. */ | |
681 | channel->ccws[index].count = buffer->count; | |
682 | /* Check relevant PCI/suspend bits. */ | |
683 | __lcs_ready_buffer_bits(channel, index); | |
684 | rc = __lcs_resume_channel(channel); | |
685 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
686 | return rc; | |
687 | } | |
688 | ||
689 | /** | |
690 | * Mark the buffer as processed. Take care of the suspend bit | |
691 | * of the previous buffer. This function is called from | |
692 | * interrupt context, so the lock must not be taken. | |
693 | */ | |
694 | static int | |
695 | __lcs_processed_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
696 | { | |
697 | int index, prev, next; | |
698 | ||
699 | LCS_DBF_TEXT(5, trace, "prcsbuff"); | |
9163bb2e UB |
700 | BUG_ON(buffer->state != LCS_BUF_STATE_READY); |
701 | buffer->state = LCS_BUF_STATE_PROCESSED; | |
1da177e4 LT |
702 | index = buffer - channel->iob; |
703 | prev = (index - 1) & (LCS_NUM_BUFFS - 1); | |
704 | next = (index + 1) & (LCS_NUM_BUFFS - 1); | |
705 | /* Set the suspend bit and clear the PCI bit of this buffer. */ | |
706 | channel->ccws[index].flags |= CCW_FLAG_SUSPEND; | |
707 | channel->ccws[index].flags &= ~CCW_FLAG_PCI; | |
708 | /* Check the suspend bit of the previous buffer. */ | |
9163bb2e | 709 | if (channel->iob[prev].state == LCS_BUF_STATE_READY) { |
1da177e4 LT |
710 | /* |
711 | * Previous buffer is in state ready. It might have | |
712 | * happened in lcs_ready_buffer that the suspend bit | |
713 | * has not been cleared to avoid an endless loop. | |
714 | * Do it now. | |
715 | */ | |
716 | __lcs_ready_buffer_bits(channel, prev); | |
717 | } | |
718 | /* Clear PCI bit of next buffer. */ | |
719 | channel->ccws[next].flags &= ~CCW_FLAG_PCI; | |
720 | return __lcs_resume_channel(channel); | |
721 | } | |
722 | ||
723 | /** | |
724 | * Put a processed buffer back to state empty. | |
725 | */ | |
726 | static void | |
727 | lcs_release_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
728 | { | |
729 | unsigned long flags; | |
730 | ||
731 | LCS_DBF_TEXT(5, trace, "relbuff"); | |
9163bb2e UB |
732 | BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED && |
733 | buffer->state != LCS_BUF_STATE_PROCESSED); | |
1da177e4 | 734 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
9163bb2e | 735 | buffer->state = LCS_BUF_STATE_EMPTY; |
1da177e4 LT |
736 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); |
737 | } | |
738 | ||
739 | /** | |
740 | * Get buffer for a lan command. | |
741 | */ | |
742 | static struct lcs_buffer * | |
743 | lcs_get_lancmd(struct lcs_card *card, int count) | |
744 | { | |
745 | struct lcs_buffer *buffer; | |
746 | struct lcs_cmd *cmd; | |
747 | ||
748 | LCS_DBF_TEXT(4, trace, "getlncmd"); | |
749 | /* Get buffer and wait if none is available. */ | |
750 | wait_event(card->write.wait_q, | |
751 | ((buffer = lcs_get_buffer(&card->write)) != NULL)); | |
752 | count += sizeof(struct lcs_header); | |
753 | *(__u16 *)(buffer->data + count) = 0; | |
754 | buffer->count = count + sizeof(__u16); | |
755 | buffer->callback = lcs_release_buffer; | |
756 | cmd = (struct lcs_cmd *) buffer->data; | |
757 | cmd->offset = count; | |
758 | cmd->type = LCS_FRAME_TYPE_CONTROL; | |
759 | cmd->slot = 0; | |
760 | return buffer; | |
761 | } | |
762 | ||
763 | ||
764 | static void | |
765 | lcs_get_reply(struct lcs_reply *reply) | |
766 | { | |
767 | WARN_ON(atomic_read(&reply->refcnt) <= 0); | |
768 | atomic_inc(&reply->refcnt); | |
769 | } | |
770 | ||
771 | static void | |
772 | lcs_put_reply(struct lcs_reply *reply) | |
773 | { | |
774 | WARN_ON(atomic_read(&reply->refcnt) <= 0); | |
775 | if (atomic_dec_and_test(&reply->refcnt)) { | |
776 | kfree(reply); | |
777 | } | |
778 | ||
779 | } | |
780 | ||
781 | static struct lcs_reply * | |
782 | lcs_alloc_reply(struct lcs_cmd *cmd) | |
783 | { | |
784 | struct lcs_reply *reply; | |
785 | ||
786 | LCS_DBF_TEXT(4, trace, "getreply"); | |
787 | ||
88abaab4 | 788 | reply = kzalloc(sizeof(struct lcs_reply), GFP_ATOMIC); |
1da177e4 LT |
789 | if (!reply) |
790 | return NULL; | |
1da177e4 LT |
791 | atomic_set(&reply->refcnt,1); |
792 | reply->sequence_no = cmd->sequence_no; | |
793 | reply->received = 0; | |
794 | reply->rc = 0; | |
795 | init_waitqueue_head(&reply->wait_q); | |
796 | ||
797 | return reply; | |
798 | } | |
799 | ||
800 | /** | |
801 | * Notifier function for lancmd replies. Called from read irq. | |
802 | */ | |
803 | static void | |
804 | lcs_notify_lancmd_waiters(struct lcs_card *card, struct lcs_cmd *cmd) | |
805 | { | |
806 | struct list_head *l, *n; | |
807 | struct lcs_reply *reply; | |
808 | ||
809 | LCS_DBF_TEXT(4, trace, "notiwait"); | |
810 | spin_lock(&card->lock); | |
811 | list_for_each_safe(l, n, &card->lancmd_waiters) { | |
812 | reply = list_entry(l, struct lcs_reply, list); | |
813 | if (reply->sequence_no == cmd->sequence_no) { | |
814 | lcs_get_reply(reply); | |
815 | list_del_init(&reply->list); | |
816 | if (reply->callback != NULL) | |
817 | reply->callback(card, cmd); | |
818 | reply->received = 1; | |
819 | reply->rc = cmd->return_code; | |
820 | wake_up(&reply->wait_q); | |
821 | lcs_put_reply(reply); | |
822 | break; | |
823 | } | |
824 | } | |
825 | spin_unlock(&card->lock); | |
826 | } | |
827 | ||
828 | /** | |
829 | * Emit buffer of a lan comand. | |
830 | */ | |
2b67fc46 | 831 | static void |
1da177e4 LT |
832 | lcs_lancmd_timeout(unsigned long data) |
833 | { | |
834 | struct lcs_reply *reply, *list_reply, *r; | |
835 | unsigned long flags; | |
836 | ||
837 | LCS_DBF_TEXT(4, trace, "timeout"); | |
838 | reply = (struct lcs_reply *) data; | |
839 | spin_lock_irqsave(&reply->card->lock, flags); | |
840 | list_for_each_entry_safe(list_reply, r, | |
841 | &reply->card->lancmd_waiters,list) { | |
842 | if (reply == list_reply) { | |
843 | lcs_get_reply(reply); | |
844 | list_del_init(&reply->list); | |
845 | spin_unlock_irqrestore(&reply->card->lock, flags); | |
846 | reply->received = 1; | |
847 | reply->rc = -ETIME; | |
848 | wake_up(&reply->wait_q); | |
849 | lcs_put_reply(reply); | |
850 | return; | |
851 | } | |
852 | } | |
853 | spin_unlock_irqrestore(&reply->card->lock, flags); | |
854 | } | |
855 | ||
856 | static int | |
857 | lcs_send_lancmd(struct lcs_card *card, struct lcs_buffer *buffer, | |
858 | void (*reply_callback)(struct lcs_card *, struct lcs_cmd *)) | |
859 | { | |
860 | struct lcs_reply *reply; | |
861 | struct lcs_cmd *cmd; | |
862 | struct timer_list timer; | |
863 | unsigned long flags; | |
864 | int rc; | |
865 | ||
866 | LCS_DBF_TEXT(4, trace, "sendcmd"); | |
867 | cmd = (struct lcs_cmd *) buffer->data; | |
868 | cmd->return_code = 0; | |
869 | cmd->sequence_no = card->sequence_no++; | |
870 | reply = lcs_alloc_reply(cmd); | |
871 | if (!reply) | |
872 | return -ENOMEM; | |
873 | reply->callback = reply_callback; | |
874 | reply->card = card; | |
875 | spin_lock_irqsave(&card->lock, flags); | |
876 | list_add_tail(&reply->list, &card->lancmd_waiters); | |
877 | spin_unlock_irqrestore(&card->lock, flags); | |
878 | ||
879 | buffer->callback = lcs_release_buffer; | |
880 | rc = lcs_ready_buffer(&card->write, buffer); | |
881 | if (rc) | |
882 | return rc; | |
883 | init_timer(&timer); | |
884 | timer.function = lcs_lancmd_timeout; | |
885 | timer.data = (unsigned long) reply; | |
886 | timer.expires = jiffies + HZ*card->lancmd_timeout; | |
887 | add_timer(&timer); | |
888 | wait_event(reply->wait_q, reply->received); | |
889 | del_timer_sync(&timer); | |
890 | LCS_DBF_TEXT_(4, trace, "rc:%d",reply->rc); | |
891 | rc = reply->rc; | |
892 | lcs_put_reply(reply); | |
893 | return rc ? -EIO : 0; | |
894 | } | |
895 | ||
896 | /** | |
897 | * LCS startup command | |
898 | */ | |
899 | static int | |
900 | lcs_send_startup(struct lcs_card *card, __u8 initiator) | |
901 | { | |
902 | struct lcs_buffer *buffer; | |
903 | struct lcs_cmd *cmd; | |
904 | ||
905 | LCS_DBF_TEXT(2, trace, "startup"); | |
906 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
907 | cmd = (struct lcs_cmd *) buffer->data; | |
908 | cmd->cmd_code = LCS_CMD_STARTUP; | |
909 | cmd->initiator = initiator; | |
910 | cmd->cmd.lcs_startup.buff_size = LCS_IOBUFFERSIZE; | |
911 | return lcs_send_lancmd(card, buffer, NULL); | |
912 | } | |
913 | ||
914 | /** | |
915 | * LCS shutdown command | |
916 | */ | |
917 | static int | |
918 | lcs_send_shutdown(struct lcs_card *card) | |
919 | { | |
920 | struct lcs_buffer *buffer; | |
921 | struct lcs_cmd *cmd; | |
922 | ||
923 | LCS_DBF_TEXT(2, trace, "shutdown"); | |
924 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
925 | cmd = (struct lcs_cmd *) buffer->data; | |
926 | cmd->cmd_code = LCS_CMD_SHUTDOWN; | |
927 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
928 | return lcs_send_lancmd(card, buffer, NULL); | |
929 | } | |
930 | ||
931 | /** | |
932 | * LCS lanstat command | |
933 | */ | |
934 | static void | |
935 | __lcs_lanstat_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
936 | { | |
937 | LCS_DBF_TEXT(2, trace, "statcb"); | |
938 | memcpy(card->mac, cmd->cmd.lcs_lanstat_cmd.mac_addr, LCS_MAC_LENGTH); | |
939 | } | |
940 | ||
941 | static int | |
942 | lcs_send_lanstat(struct lcs_card *card) | |
943 | { | |
944 | struct lcs_buffer *buffer; | |
945 | struct lcs_cmd *cmd; | |
946 | ||
947 | LCS_DBF_TEXT(2,trace, "cmdstat"); | |
948 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
949 | cmd = (struct lcs_cmd *) buffer->data; | |
950 | /* Setup lanstat command. */ | |
951 | cmd->cmd_code = LCS_CMD_LANSTAT; | |
952 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
953 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
954 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
955 | return lcs_send_lancmd(card, buffer, __lcs_lanstat_cb); | |
956 | } | |
957 | ||
958 | /** | |
959 | * send stoplan command | |
960 | */ | |
961 | static int | |
962 | lcs_send_stoplan(struct lcs_card *card, __u8 initiator) | |
963 | { | |
964 | struct lcs_buffer *buffer; | |
965 | struct lcs_cmd *cmd; | |
966 | ||
967 | LCS_DBF_TEXT(2, trace, "cmdstpln"); | |
968 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
969 | cmd = (struct lcs_cmd *) buffer->data; | |
970 | cmd->cmd_code = LCS_CMD_STOPLAN; | |
971 | cmd->initiator = initiator; | |
972 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
973 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
974 | return lcs_send_lancmd(card, buffer, NULL); | |
975 | } | |
976 | ||
977 | /** | |
978 | * send startlan command | |
979 | */ | |
980 | static void | |
981 | __lcs_send_startlan_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
982 | { | |
983 | LCS_DBF_TEXT(2, trace, "srtlancb"); | |
984 | card->lan_type = cmd->cmd.lcs_std_cmd.lan_type; | |
985 | card->portno = cmd->cmd.lcs_std_cmd.portno; | |
986 | } | |
987 | ||
988 | static int | |
989 | lcs_send_startlan(struct lcs_card *card, __u8 initiator) | |
990 | { | |
991 | struct lcs_buffer *buffer; | |
992 | struct lcs_cmd *cmd; | |
993 | ||
994 | LCS_DBF_TEXT(2, trace, "cmdstaln"); | |
995 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
996 | cmd = (struct lcs_cmd *) buffer->data; | |
997 | cmd->cmd_code = LCS_CMD_STARTLAN; | |
998 | cmd->initiator = initiator; | |
999 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
1000 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
1001 | return lcs_send_lancmd(card, buffer, __lcs_send_startlan_cb); | |
1002 | } | |
1003 | ||
1004 | #ifdef CONFIG_IP_MULTICAST | |
1005 | /** | |
1006 | * send setipm command (Multicast) | |
1007 | */ | |
1008 | static int | |
1009 | lcs_send_setipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list) | |
1010 | { | |
1011 | struct lcs_buffer *buffer; | |
1012 | struct lcs_cmd *cmd; | |
1013 | ||
1014 | LCS_DBF_TEXT(2, trace, "cmdsetim"); | |
1015 | buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE); | |
1016 | cmd = (struct lcs_cmd *) buffer->data; | |
1017 | cmd->cmd_code = LCS_CMD_SETIPM; | |
1018 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1019 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1020 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1021 | cmd->cmd.lcs_qipassist.version = 4; | |
1022 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1023 | memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair, | |
1024 | &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair)); | |
1025 | LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr); | |
1026 | return lcs_send_lancmd(card, buffer, NULL); | |
1027 | } | |
1028 | ||
1029 | /** | |
1030 | * send delipm command (Multicast) | |
1031 | */ | |
1032 | static int | |
1033 | lcs_send_delipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list) | |
1034 | { | |
1035 | struct lcs_buffer *buffer; | |
1036 | struct lcs_cmd *cmd; | |
1037 | ||
1038 | LCS_DBF_TEXT(2, trace, "cmddelim"); | |
1039 | buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE); | |
1040 | cmd = (struct lcs_cmd *) buffer->data; | |
1041 | cmd->cmd_code = LCS_CMD_DELIPM; | |
1042 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1043 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1044 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1045 | cmd->cmd.lcs_qipassist.version = 4; | |
1046 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1047 | memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair, | |
1048 | &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair)); | |
1049 | LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr); | |
1050 | return lcs_send_lancmd(card, buffer, NULL); | |
1051 | } | |
1052 | ||
1053 | /** | |
1054 | * check if multicast is supported by LCS | |
1055 | */ | |
1056 | static void | |
1057 | __lcs_check_multicast_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
1058 | { | |
1059 | LCS_DBF_TEXT(2, trace, "chkmccb"); | |
1060 | card->ip_assists_supported = | |
1061 | cmd->cmd.lcs_qipassist.ip_assists_supported; | |
1062 | card->ip_assists_enabled = | |
1063 | cmd->cmd.lcs_qipassist.ip_assists_enabled; | |
1064 | } | |
1065 | ||
1066 | static int | |
1067 | lcs_check_multicast_support(struct lcs_card *card) | |
1068 | { | |
1069 | struct lcs_buffer *buffer; | |
1070 | struct lcs_cmd *cmd; | |
1071 | int rc; | |
1072 | ||
1073 | LCS_DBF_TEXT(2, trace, "cmdqipa"); | |
1074 | /* Send query ipassist. */ | |
1075 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
1076 | cmd = (struct lcs_cmd *) buffer->data; | |
1077 | cmd->cmd_code = LCS_CMD_QIPASSIST; | |
1078 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1079 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1080 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1081 | cmd->cmd.lcs_qipassist.version = 4; | |
1082 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1083 | rc = lcs_send_lancmd(card, buffer, __lcs_check_multicast_cb); | |
1084 | if (rc != 0) { | |
1085 | PRINT_ERR("Query IPAssist failed. Assuming unsupported!\n"); | |
1086 | return -EOPNOTSUPP; | |
1087 | } | |
1da177e4 LT |
1088 | if (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) |
1089 | return 0; | |
1090 | return -EOPNOTSUPP; | |
1091 | } | |
1092 | ||
1093 | /** | |
1094 | * set or del multicast address on LCS card | |
1095 | */ | |
1096 | static void | |
1097 | lcs_fix_multicast_list(struct lcs_card *card) | |
1098 | { | |
1099 | struct list_head failed_list; | |
1100 | struct lcs_ipm_list *ipm, *tmp; | |
1101 | unsigned long flags; | |
1102 | int rc; | |
1103 | ||
1104 | LCS_DBF_TEXT(4,trace, "fixipm"); | |
1105 | INIT_LIST_HEAD(&failed_list); | |
1106 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1107 | list_modified: | |
1108 | list_for_each_entry_safe(ipm, tmp, &card->ipm_list, list){ | |
1109 | switch (ipm->ipm_state) { | |
1110 | case LCS_IPM_STATE_SET_REQUIRED: | |
1111 | /* del from ipm_list so noone else can tamper with | |
1112 | * this entry */ | |
1113 | list_del_init(&ipm->list); | |
1114 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1115 | rc = lcs_send_setipm(card, ipm); | |
1116 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1117 | if (rc) { | |
ceb3dfba | 1118 | PRINT_INFO("Adding multicast address failed. " |
1da177e4 LT |
1119 | "Table possibly full!\n"); |
1120 | /* store ipm in failed list -> will be added | |
1121 | * to ipm_list again, so a retry will be done | |
1122 | * during the next call of this function */ | |
1123 | list_add_tail(&ipm->list, &failed_list); | |
1124 | } else { | |
1125 | ipm->ipm_state = LCS_IPM_STATE_ON_CARD; | |
1126 | /* re-insert into ipm_list */ | |
1127 | list_add_tail(&ipm->list, &card->ipm_list); | |
1128 | } | |
1129 | goto list_modified; | |
1130 | case LCS_IPM_STATE_DEL_REQUIRED: | |
1131 | list_del(&ipm->list); | |
1132 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1133 | lcs_send_delipm(card, ipm); | |
1134 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1135 | kfree(ipm); | |
1136 | goto list_modified; | |
1137 | case LCS_IPM_STATE_ON_CARD: | |
1138 | break; | |
1139 | } | |
1140 | } | |
1141 | /* re-insert all entries from the failed_list into ipm_list */ | |
179e0917 AM |
1142 | list_for_each_entry_safe(ipm, tmp, &failed_list, list) |
1143 | list_move_tail(&ipm->list, &card->ipm_list); | |
1144 | ||
1da177e4 | 1145 | spin_unlock_irqrestore(&card->ipm_lock, flags); |
1da177e4 LT |
1146 | } |
1147 | ||
1148 | /** | |
1149 | * get mac address for the relevant Multicast address | |
1150 | */ | |
1151 | static void | |
5a5a852e | 1152 | lcs_get_mac_for_ipm(__be32 ipm, char *mac, struct net_device *dev) |
1da177e4 LT |
1153 | { |
1154 | LCS_DBF_TEXT(4,trace, "getmac"); | |
1155 | if (dev->type == ARPHRD_IEEE802_TR) | |
1156 | ip_tr_mc_map(ipm, mac); | |
1157 | else | |
1158 | ip_eth_mc_map(ipm, mac); | |
1159 | } | |
1160 | ||
1161 | /** | |
1162 | * function called by net device to handle multicast address relevant things | |
1163 | */ | |
1164 | static inline void | |
1165 | lcs_remove_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) | |
1166 | { | |
1167 | struct ip_mc_list *im4; | |
1168 | struct list_head *l; | |
1169 | struct lcs_ipm_list *ipm; | |
1170 | unsigned long flags; | |
1171 | char buf[MAX_ADDR_LEN]; | |
1172 | ||
1173 | LCS_DBF_TEXT(4, trace, "remmclst"); | |
1174 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1175 | list_for_each(l, &card->ipm_list) { | |
1176 | ipm = list_entry(l, struct lcs_ipm_list, list); | |
1177 | for (im4 = in4_dev->mc_list; im4 != NULL; im4 = im4->next) { | |
1178 | lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); | |
1179 | if ( (ipm->ipm.ip_addr == im4->multiaddr) && | |
1180 | (memcmp(buf, &ipm->ipm.mac_addr, | |
1181 | LCS_MAC_LENGTH) == 0) ) | |
1182 | break; | |
1183 | } | |
1184 | if (im4 == NULL) | |
1185 | ipm->ipm_state = LCS_IPM_STATE_DEL_REQUIRED; | |
1186 | } | |
1187 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1188 | } | |
1189 | ||
1190 | static inline struct lcs_ipm_list * | |
1191 | lcs_check_addr_entry(struct lcs_card *card, struct ip_mc_list *im4, char *buf) | |
1192 | { | |
1193 | struct lcs_ipm_list *tmp, *ipm = NULL; | |
1194 | struct list_head *l; | |
1195 | unsigned long flags; | |
1196 | ||
1197 | LCS_DBF_TEXT(4, trace, "chkmcent"); | |
1198 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1199 | list_for_each(l, &card->ipm_list) { | |
1200 | tmp = list_entry(l, struct lcs_ipm_list, list); | |
1201 | if ( (tmp->ipm.ip_addr == im4->multiaddr) && | |
1202 | (memcmp(buf, &tmp->ipm.mac_addr, | |
1203 | LCS_MAC_LENGTH) == 0) ) { | |
1204 | ipm = tmp; | |
1205 | break; | |
1206 | } | |
1207 | } | |
1208 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1209 | return ipm; | |
1210 | } | |
1211 | ||
1212 | static inline void | |
1213 | lcs_set_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) | |
1214 | { | |
1215 | ||
1216 | struct ip_mc_list *im4; | |
1217 | struct lcs_ipm_list *ipm; | |
1218 | char buf[MAX_ADDR_LEN]; | |
1219 | unsigned long flags; | |
1220 | ||
1221 | LCS_DBF_TEXT(4, trace, "setmclst"); | |
1222 | for (im4 = in4_dev->mc_list; im4; im4 = im4->next) { | |
1223 | lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); | |
1224 | ipm = lcs_check_addr_entry(card, im4, buf); | |
1225 | if (ipm != NULL) | |
1226 | continue; /* Address already in list. */ | |
1227 | ipm = (struct lcs_ipm_list *) | |
27eb5ac8 | 1228 | kzalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC); |
1da177e4 LT |
1229 | if (ipm == NULL) { |
1230 | PRINT_INFO("Not enough memory to add " | |
1231 | "new multicast entry!\n"); | |
1232 | break; | |
1233 | } | |
1da177e4 LT |
1234 | memcpy(&ipm->ipm.mac_addr, buf, LCS_MAC_LENGTH); |
1235 | ipm->ipm.ip_addr = im4->multiaddr; | |
1236 | ipm->ipm_state = LCS_IPM_STATE_SET_REQUIRED; | |
1237 | spin_lock_irqsave(&card->ipm_lock, flags); | |
27eb5ac8 | 1238 | LCS_DBF_HEX(2,trace,&ipm->ipm.ip_addr,4); |
1da177e4 LT |
1239 | list_add(&ipm->list, &card->ipm_list); |
1240 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1241 | } | |
1242 | } | |
1243 | ||
1244 | static int | |
1245 | lcs_register_mc_addresses(void *data) | |
1246 | { | |
1247 | struct lcs_card *card; | |
1248 | struct in_device *in4_dev; | |
1249 | ||
1250 | card = (struct lcs_card *) data; | |
1251 | daemonize("regipm"); | |
1252 | ||
1253 | if (!lcs_do_run_thread(card, LCS_SET_MC_THREAD)) | |
1254 | return 0; | |
1255 | LCS_DBF_TEXT(4, trace, "regmulti"); | |
1256 | ||
1257 | in4_dev = in_dev_get(card->dev); | |
1258 | if (in4_dev == NULL) | |
1259 | goto out; | |
1260 | read_lock(&in4_dev->mc_list_lock); | |
1261 | lcs_remove_mc_addresses(card,in4_dev); | |
1262 | lcs_set_mc_addresses(card, in4_dev); | |
1263 | read_unlock(&in4_dev->mc_list_lock); | |
1264 | in_dev_put(in4_dev); | |
1265 | ||
27eb5ac8 KW |
1266 | netif_carrier_off(card->dev); |
1267 | netif_tx_disable(card->dev); | |
1268 | wait_event(card->write.wait_q, | |
9163bb2e | 1269 | (card->write.state != LCS_CH_STATE_RUNNING)); |
1da177e4 | 1270 | lcs_fix_multicast_list(card); |
27eb5ac8 KW |
1271 | if (card->state == DEV_STATE_UP) { |
1272 | netif_carrier_on(card->dev); | |
1273 | netif_wake_queue(card->dev); | |
1274 | } | |
1da177e4 LT |
1275 | out: |
1276 | lcs_clear_thread_running_bit(card, LCS_SET_MC_THREAD); | |
1277 | return 0; | |
1278 | } | |
1279 | /** | |
1280 | * function called by net device to | |
1281 | * handle multicast address relevant things | |
1282 | */ | |
1283 | static void | |
1284 | lcs_set_multicast_list(struct net_device *dev) | |
1285 | { | |
1286 | struct lcs_card *card; | |
1287 | ||
1288 | LCS_DBF_TEXT(4, trace, "setmulti"); | |
1289 | card = (struct lcs_card *) dev->priv; | |
1290 | ||
e82b0f2c | 1291 | if (!lcs_set_thread_start_bit(card, LCS_SET_MC_THREAD)) |
1da177e4 | 1292 | schedule_work(&card->kernel_thread_starter); |
1da177e4 LT |
1293 | } |
1294 | ||
1295 | #endif /* CONFIG_IP_MULTICAST */ | |
1296 | ||
1297 | static long | |
1298 | lcs_check_irb_error(struct ccw_device *cdev, struct irb *irb) | |
1299 | { | |
1300 | if (!IS_ERR(irb)) | |
1301 | return 0; | |
1302 | ||
1303 | switch (PTR_ERR(irb)) { | |
1304 | case -EIO: | |
1305 | PRINT_WARN("i/o-error on device %s\n", cdev->dev.bus_id); | |
1306 | LCS_DBF_TEXT(2, trace, "ckirberr"); | |
1307 | LCS_DBF_TEXT_(2, trace, " rc%d", -EIO); | |
1308 | break; | |
1309 | case -ETIMEDOUT: | |
1310 | PRINT_WARN("timeout on device %s\n", cdev->dev.bus_id); | |
1311 | LCS_DBF_TEXT(2, trace, "ckirberr"); | |
1312 | LCS_DBF_TEXT_(2, trace, " rc%d", -ETIMEDOUT); | |
1313 | break; | |
1314 | default: | |
1315 | PRINT_WARN("unknown error %ld on device %s\n", PTR_ERR(irb), | |
1316 | cdev->dev.bus_id); | |
1317 | LCS_DBF_TEXT(2, trace, "ckirberr"); | |
1318 | LCS_DBF_TEXT(2, trace, " rc???"); | |
1319 | } | |
1320 | return PTR_ERR(irb); | |
1321 | } | |
1322 | ||
27eb5ac8 KW |
1323 | static int |
1324 | lcs_get_problem(struct ccw_device *cdev, struct irb *irb) | |
1325 | { | |
1326 | int dstat, cstat; | |
1327 | char *sense; | |
1328 | ||
1329 | sense = (char *) irb->ecw; | |
23d805b6 PO |
1330 | cstat = irb->scsw.cmd.cstat; |
1331 | dstat = irb->scsw.cmd.dstat; | |
27eb5ac8 KW |
1332 | |
1333 | if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK | | |
1334 | SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK | | |
1335 | SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) { | |
1336 | LCS_DBF_TEXT(2, trace, "CGENCHK"); | |
1337 | return 1; | |
1338 | } | |
1339 | if (dstat & DEV_STAT_UNIT_CHECK) { | |
1340 | if (sense[LCS_SENSE_BYTE_1] & | |
1341 | LCS_SENSE_RESETTING_EVENT) { | |
1342 | LCS_DBF_TEXT(2, trace, "REVIND"); | |
1343 | return 1; | |
1344 | } | |
1345 | if (sense[LCS_SENSE_BYTE_0] & | |
1346 | LCS_SENSE_CMD_REJECT) { | |
1347 | LCS_DBF_TEXT(2, trace, "CMDREJ"); | |
1348 | return 0; | |
1349 | } | |
1350 | if ((!sense[LCS_SENSE_BYTE_0]) && | |
1351 | (!sense[LCS_SENSE_BYTE_1]) && | |
1352 | (!sense[LCS_SENSE_BYTE_2]) && | |
1353 | (!sense[LCS_SENSE_BYTE_3])) { | |
1354 | LCS_DBF_TEXT(2, trace, "ZEROSEN"); | |
1355 | return 0; | |
1356 | } | |
1357 | LCS_DBF_TEXT(2, trace, "DGENCHK"); | |
1358 | return 1; | |
1359 | } | |
1360 | return 0; | |
1361 | } | |
1362 | ||
2b67fc46 | 1363 | static void |
27eb5ac8 KW |
1364 | lcs_schedule_recovery(struct lcs_card *card) |
1365 | { | |
1366 | LCS_DBF_TEXT(2, trace, "startrec"); | |
1367 | if (!lcs_set_thread_start_bit(card, LCS_RECOVERY_THREAD)) | |
1368 | schedule_work(&card->kernel_thread_starter); | |
1369 | } | |
1da177e4 LT |
1370 | |
1371 | /** | |
1372 | * IRQ Handler for LCS channels | |
1373 | */ | |
1374 | static void | |
1375 | lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb) | |
1376 | { | |
1377 | struct lcs_card *card; | |
1378 | struct lcs_channel *channel; | |
27eb5ac8 KW |
1379 | int rc, index; |
1380 | int cstat, dstat; | |
1da177e4 LT |
1381 | |
1382 | if (lcs_check_irb_error(cdev, irb)) | |
1383 | return; | |
1384 | ||
1385 | card = CARD_FROM_DEV(cdev); | |
1386 | if (card->read.ccwdev == cdev) | |
1387 | channel = &card->read; | |
1388 | else | |
1389 | channel = &card->write; | |
1390 | ||
23d805b6 PO |
1391 | cstat = irb->scsw.cmd.cstat; |
1392 | dstat = irb->scsw.cmd.dstat; | |
1da177e4 | 1393 | LCS_DBF_TEXT_(5, trace, "Rint%s",cdev->dev.bus_id); |
23d805b6 PO |
1394 | LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.cstat, |
1395 | irb->scsw.cmd.dstat); | |
1396 | LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.fctl, | |
1397 | irb->scsw.cmd.actl); | |
1da177e4 | 1398 | |
27eb5ac8 KW |
1399 | /* Check for channel and device errors presented */ |
1400 | rc = lcs_get_problem(cdev, irb); | |
1401 | if (rc || (dstat & DEV_STAT_UNIT_EXCEP)) { | |
e82b0f2c | 1402 | PRINT_WARN("check on device %s, dstat=0x%X, cstat=0x%X \n", |
27eb5ac8 KW |
1403 | cdev->dev.bus_id, dstat, cstat); |
1404 | if (rc) { | |
59579da3 | 1405 | channel->state = LCS_CH_STATE_ERROR; |
27eb5ac8 KW |
1406 | } |
1407 | } | |
59579da3 KW |
1408 | if (channel->state == LCS_CH_STATE_ERROR) { |
1409 | lcs_schedule_recovery(card); | |
1410 | wake_up(&card->wait_q); | |
1411 | return; | |
1412 | } | |
1da177e4 | 1413 | /* How far in the ccw chain have we processed? */ |
9163bb2e | 1414 | if ((channel->state != LCS_CH_STATE_INIT) && |
23d805b6 PO |
1415 | (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC)) { |
1416 | index = (struct ccw1 *) __va((addr_t) irb->scsw.cmd.cpa) | |
1da177e4 | 1417 | - channel->ccws; |
23d805b6 PO |
1418 | if ((irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) || |
1419 | (irb->scsw.cmd.cstat & SCHN_STAT_PCI)) | |
1da177e4 LT |
1420 | /* Bloody io subsystem tells us lies about cpa... */ |
1421 | index = (index - 1) & (LCS_NUM_BUFFS - 1); | |
1422 | while (channel->io_idx != index) { | |
1423 | __lcs_processed_buffer(channel, | |
1424 | channel->iob + channel->io_idx); | |
1425 | channel->io_idx = | |
1426 | (channel->io_idx + 1) & (LCS_NUM_BUFFS - 1); | |
1427 | } | |
1428 | } | |
1429 | ||
23d805b6 PO |
1430 | if ((irb->scsw.cmd.dstat & DEV_STAT_DEV_END) || |
1431 | (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) || | |
1432 | (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)) | |
1da177e4 | 1433 | /* Mark channel as stopped. */ |
9163bb2e | 1434 | channel->state = LCS_CH_STATE_STOPPED; |
23d805b6 | 1435 | else if (irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) |
1da177e4 | 1436 | /* CCW execution stopped on a suspend bit. */ |
9163bb2e | 1437 | channel->state = LCS_CH_STATE_SUSPENDED; |
23d805b6 PO |
1438 | if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) { |
1439 | if (irb->scsw.cmd.cc != 0) { | |
1da177e4 LT |
1440 | ccw_device_halt(channel->ccwdev, (addr_t) channel); |
1441 | return; | |
1442 | } | |
1443 | /* The channel has been stopped by halt_IO. */ | |
9163bb2e | 1444 | channel->state = LCS_CH_STATE_HALTED; |
1da177e4 | 1445 | } |
23d805b6 | 1446 | if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) |
9163bb2e | 1447 | channel->state = LCS_CH_STATE_CLEARED; |
1da177e4 LT |
1448 | /* Do the rest in the tasklet. */ |
1449 | tasklet_schedule(&channel->irq_tasklet); | |
1450 | } | |
1451 | ||
1452 | /** | |
1453 | * Tasklet for IRQ handler | |
1454 | */ | |
1455 | static void | |
1456 | lcs_tasklet(unsigned long data) | |
1457 | { | |
1458 | unsigned long flags; | |
1459 | struct lcs_channel *channel; | |
1460 | struct lcs_buffer *iob; | |
1461 | int buf_idx; | |
1462 | int rc; | |
1463 | ||
1464 | channel = (struct lcs_channel *) data; | |
1465 | LCS_DBF_TEXT_(5, trace, "tlet%s",channel->ccwdev->dev.bus_id); | |
1466 | ||
1467 | /* Check for processed buffers. */ | |
1468 | iob = channel->iob; | |
1469 | buf_idx = channel->buf_idx; | |
9163bb2e | 1470 | while (iob[buf_idx].state == LCS_BUF_STATE_PROCESSED) { |
1da177e4 LT |
1471 | /* Do the callback thing. */ |
1472 | if (iob[buf_idx].callback != NULL) | |
1473 | iob[buf_idx].callback(channel, iob + buf_idx); | |
1474 | buf_idx = (buf_idx + 1) & (LCS_NUM_BUFFS - 1); | |
1475 | } | |
1476 | channel->buf_idx = buf_idx; | |
1477 | ||
9163bb2e | 1478 | if (channel->state == LCS_CH_STATE_STOPPED) |
1da177e4 LT |
1479 | // FIXME: what if rc != 0 ?? |
1480 | rc = lcs_start_channel(channel); | |
1481 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); | |
9163bb2e UB |
1482 | if (channel->state == LCS_CH_STATE_SUSPENDED && |
1483 | channel->iob[channel->io_idx].state == LCS_BUF_STATE_READY) { | |
1da177e4 LT |
1484 | // FIXME: what if rc != 0 ?? |
1485 | rc = __lcs_resume_channel(channel); | |
1486 | } | |
1487 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
1488 | ||
1489 | /* Something happened on the channel. Wake up waiters. */ | |
1490 | wake_up(&channel->wait_q); | |
1491 | } | |
1492 | ||
1493 | /** | |
1494 | * Finish current tx buffer and make it ready for transmit. | |
1495 | */ | |
1496 | static void | |
1497 | __lcs_emit_txbuffer(struct lcs_card *card) | |
1498 | { | |
1499 | LCS_DBF_TEXT(5, trace, "emittx"); | |
1500 | *(__u16 *)(card->tx_buffer->data + card->tx_buffer->count) = 0; | |
1501 | card->tx_buffer->count += 2; | |
1502 | lcs_ready_buffer(&card->write, card->tx_buffer); | |
1503 | card->tx_buffer = NULL; | |
1504 | card->tx_emitted++; | |
1505 | } | |
1506 | ||
1507 | /** | |
1508 | * Callback for finished tx buffers. | |
1509 | */ | |
1510 | static void | |
1511 | lcs_txbuffer_cb(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
1512 | { | |
1513 | struct lcs_card *card; | |
1514 | ||
1515 | LCS_DBF_TEXT(5, trace, "txbuffcb"); | |
1516 | /* Put buffer back to pool. */ | |
1517 | lcs_release_buffer(channel, buffer); | |
b385a144 | 1518 | card = container_of(channel, struct lcs_card, write); |
27eb5ac8 | 1519 | if (netif_queue_stopped(card->dev) && netif_carrier_ok(card->dev)) |
0d613a27 | 1520 | netif_wake_queue(card->dev); |
1da177e4 LT |
1521 | spin_lock(&card->lock); |
1522 | card->tx_emitted--; | |
1523 | if (card->tx_emitted <= 0 && card->tx_buffer != NULL) | |
1524 | /* | |
1525 | * Last running tx buffer has finished. Submit partially | |
1526 | * filled current buffer. | |
1527 | */ | |
1528 | __lcs_emit_txbuffer(card); | |
1529 | spin_unlock(&card->lock); | |
1530 | } | |
1531 | ||
1532 | /** | |
1533 | * Packet transmit function called by network stack | |
1534 | */ | |
1535 | static int | |
1536 | __lcs_start_xmit(struct lcs_card *card, struct sk_buff *skb, | |
1537 | struct net_device *dev) | |
1538 | { | |
1539 | struct lcs_header *header; | |
0d613a27 | 1540 | int rc = 0; |
1da177e4 LT |
1541 | |
1542 | LCS_DBF_TEXT(5, trace, "hardxmit"); | |
1543 | if (skb == NULL) { | |
1544 | card->stats.tx_dropped++; | |
1545 | card->stats.tx_errors++; | |
1546 | return -EIO; | |
1547 | } | |
1548 | if (card->state != DEV_STATE_UP) { | |
1549 | dev_kfree_skb(skb); | |
1550 | card->stats.tx_dropped++; | |
1551 | card->stats.tx_errors++; | |
1552 | card->stats.tx_carrier_errors++; | |
1553 | return 0; | |
1554 | } | |
27eb5ac8 KW |
1555 | if (skb->protocol == htons(ETH_P_IPV6)) { |
1556 | dev_kfree_skb(skb); | |
1557 | return 0; | |
1558 | } | |
0d613a27 FP |
1559 | netif_stop_queue(card->dev); |
1560 | spin_lock(&card->lock); | |
1da177e4 LT |
1561 | if (card->tx_buffer != NULL && |
1562 | card->tx_buffer->count + sizeof(struct lcs_header) + | |
1563 | skb->len + sizeof(u16) > LCS_IOBUFFERSIZE) | |
1564 | /* skb too big for current tx buffer. */ | |
1565 | __lcs_emit_txbuffer(card); | |
1566 | if (card->tx_buffer == NULL) { | |
1567 | /* Get new tx buffer */ | |
1568 | card->tx_buffer = lcs_get_buffer(&card->write); | |
1569 | if (card->tx_buffer == NULL) { | |
1570 | card->stats.tx_dropped++; | |
0d613a27 FP |
1571 | rc = -EBUSY; |
1572 | goto out; | |
1da177e4 LT |
1573 | } |
1574 | card->tx_buffer->callback = lcs_txbuffer_cb; | |
1575 | card->tx_buffer->count = 0; | |
1576 | } | |
1577 | header = (struct lcs_header *) | |
1578 | (card->tx_buffer->data + card->tx_buffer->count); | |
1579 | card->tx_buffer->count += skb->len + sizeof(struct lcs_header); | |
1580 | header->offset = card->tx_buffer->count; | |
1581 | header->type = card->lan_type; | |
1582 | header->slot = card->portno; | |
d626f62b | 1583 | skb_copy_from_linear_data(skb, header + 1, skb->len); |
0d613a27 | 1584 | spin_unlock(&card->lock); |
1da177e4 LT |
1585 | card->stats.tx_bytes += skb->len; |
1586 | card->stats.tx_packets++; | |
1587 | dev_kfree_skb(skb); | |
0d613a27 FP |
1588 | netif_wake_queue(card->dev); |
1589 | spin_lock(&card->lock); | |
1590 | if (card->tx_emitted <= 0 && card->tx_buffer != NULL) | |
1da177e4 LT |
1591 | /* If this is the first tx buffer emit it immediately. */ |
1592 | __lcs_emit_txbuffer(card); | |
0d613a27 FP |
1593 | out: |
1594 | spin_unlock(&card->lock); | |
1595 | return rc; | |
1da177e4 LT |
1596 | } |
1597 | ||
1598 | static int | |
1599 | lcs_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1600 | { | |
1601 | struct lcs_card *card; | |
1602 | int rc; | |
1603 | ||
1604 | LCS_DBF_TEXT(5, trace, "pktxmit"); | |
1605 | card = (struct lcs_card *) dev->priv; | |
1da177e4 | 1606 | rc = __lcs_start_xmit(card, skb, dev); |
1da177e4 LT |
1607 | return rc; |
1608 | } | |
1609 | ||
1610 | /** | |
1611 | * send startlan and lanstat command to make LCS device ready | |
1612 | */ | |
1613 | static int | |
1614 | lcs_startlan_auto(struct lcs_card *card) | |
1615 | { | |
1616 | int rc; | |
1617 | ||
1618 | LCS_DBF_TEXT(2, trace, "strtauto"); | |
1619 | #ifdef CONFIG_NET_ETHERNET | |
1620 | card->lan_type = LCS_FRAME_TYPE_ENET; | |
1621 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1622 | if (rc == 0) | |
1623 | return 0; | |
1624 | ||
1625 | #endif | |
1626 | #ifdef CONFIG_TR | |
1627 | card->lan_type = LCS_FRAME_TYPE_TR; | |
1628 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1629 | if (rc == 0) | |
1630 | return 0; | |
1631 | #endif | |
1632 | #ifdef CONFIG_FDDI | |
1633 | card->lan_type = LCS_FRAME_TYPE_FDDI; | |
1634 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1635 | if (rc == 0) | |
1636 | return 0; | |
1637 | #endif | |
1638 | return -EIO; | |
1639 | } | |
1640 | ||
1641 | static int | |
1642 | lcs_startlan(struct lcs_card *card) | |
1643 | { | |
1644 | int rc, i; | |
1645 | ||
1646 | LCS_DBF_TEXT(2, trace, "startlan"); | |
1647 | rc = 0; | |
1648 | if (card->portno != LCS_INVALID_PORT_NO) { | |
1649 | if (card->lan_type == LCS_FRAME_TYPE_AUTO) | |
1650 | rc = lcs_startlan_auto(card); | |
1651 | else | |
1652 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1653 | } else { | |
1654 | for (i = 0; i <= 16; i++) { | |
1655 | card->portno = i; | |
1656 | if (card->lan_type != LCS_FRAME_TYPE_AUTO) | |
1657 | rc = lcs_send_startlan(card, | |
1658 | LCS_INITIATOR_TCPIP); | |
1659 | else | |
1660 | /* autodetecting lan type */ | |
1661 | rc = lcs_startlan_auto(card); | |
1662 | if (rc == 0) | |
1663 | break; | |
1664 | } | |
1665 | } | |
1666 | if (rc == 0) | |
1667 | return lcs_send_lanstat(card); | |
1668 | return rc; | |
1669 | } | |
1670 | ||
1671 | /** | |
1672 | * LCS detect function | |
1673 | * setup channels and make them I/O ready | |
1674 | */ | |
1675 | static int | |
1676 | lcs_detect(struct lcs_card *card) | |
1677 | { | |
1678 | int rc = 0; | |
1679 | ||
1680 | LCS_DBF_TEXT(2, setup, "lcsdetct"); | |
1681 | /* start/reset card */ | |
1682 | if (card->dev) | |
1683 | netif_stop_queue(card->dev); | |
1684 | rc = lcs_stop_channels(card); | |
1685 | if (rc == 0) { | |
1686 | rc = lcs_start_channels(card); | |
1687 | if (rc == 0) { | |
1688 | rc = lcs_send_startup(card, LCS_INITIATOR_TCPIP); | |
1689 | if (rc == 0) | |
1690 | rc = lcs_startlan(card); | |
1691 | } | |
1692 | } | |
1693 | if (rc == 0) { | |
1694 | card->state = DEV_STATE_UP; | |
1695 | } else { | |
1696 | card->state = DEV_STATE_DOWN; | |
9163bb2e UB |
1697 | card->write.state = LCS_CH_STATE_INIT; |
1698 | card->read.state = LCS_CH_STATE_INIT; | |
1da177e4 LT |
1699 | } |
1700 | return rc; | |
1701 | } | |
1702 | ||
1da177e4 LT |
1703 | /** |
1704 | * LCS Stop card | |
1705 | */ | |
1706 | static int | |
1707 | lcs_stopcard(struct lcs_card *card) | |
1708 | { | |
1709 | int rc; | |
1710 | ||
1711 | LCS_DBF_TEXT(3, setup, "stopcard"); | |
1712 | ||
9163bb2e UB |
1713 | if (card->read.state != LCS_CH_STATE_STOPPED && |
1714 | card->write.state != LCS_CH_STATE_STOPPED && | |
59579da3 KW |
1715 | card->read.state != LCS_CH_STATE_ERROR && |
1716 | card->write.state != LCS_CH_STATE_ERROR && | |
1da177e4 LT |
1717 | card->state == DEV_STATE_UP) { |
1718 | lcs_clear_multicast_list(card); | |
1719 | rc = lcs_send_stoplan(card,LCS_INITIATOR_TCPIP); | |
1720 | rc = lcs_send_shutdown(card); | |
1721 | } | |
1722 | rc = lcs_stop_channels(card); | |
1723 | card->state = DEV_STATE_DOWN; | |
1724 | ||
1725 | return rc; | |
1726 | } | |
1727 | ||
1da177e4 LT |
1728 | /** |
1729 | * Kernel Thread helper functions for LGW initiated commands | |
1730 | */ | |
1731 | static void | |
4927b3f7 | 1732 | lcs_start_kernel_thread(struct work_struct *work) |
1da177e4 | 1733 | { |
4927b3f7 | 1734 | struct lcs_card *card = container_of(work, struct lcs_card, kernel_thread_starter); |
1da177e4 | 1735 | LCS_DBF_TEXT(5, trace, "krnthrd"); |
27eb5ac8 KW |
1736 | if (lcs_do_start_thread(card, LCS_RECOVERY_THREAD)) |
1737 | kernel_thread(lcs_recovery, (void *) card, SIGCHLD); | |
1da177e4 LT |
1738 | #ifdef CONFIG_IP_MULTICAST |
1739 | if (lcs_do_start_thread(card, LCS_SET_MC_THREAD)) | |
e82b0f2c | 1740 | kernel_thread(lcs_register_mc_addresses, |
27eb5ac8 | 1741 | (void *) card, SIGCHLD); |
1da177e4 LT |
1742 | #endif |
1743 | } | |
1744 | ||
1745 | /** | |
1746 | * Process control frames. | |
1747 | */ | |
1748 | static void | |
1749 | lcs_get_control(struct lcs_card *card, struct lcs_cmd *cmd) | |
1750 | { | |
1751 | LCS_DBF_TEXT(5, trace, "getctrl"); | |
1752 | if (cmd->initiator == LCS_INITIATOR_LGW) { | |
1753 | switch(cmd->cmd_code) { | |
1754 | case LCS_CMD_STARTUP: | |
1da177e4 | 1755 | case LCS_CMD_STARTLAN: |
27eb5ac8 | 1756 | lcs_schedule_recovery(card); |
1da177e4 LT |
1757 | break; |
1758 | case LCS_CMD_STOPLAN: | |
27eb5ac8 KW |
1759 | PRINT_WARN("Stoplan for %s initiated by LGW.\n", |
1760 | card->dev->name); | |
1761 | if (card->dev) | |
1762 | netif_carrier_off(card->dev); | |
1da177e4 LT |
1763 | break; |
1764 | default: | |
6b648063 | 1765 | LCS_DBF_TEXT(5, trace, "noLGWcmd"); |
1da177e4 LT |
1766 | break; |
1767 | } | |
1768 | } else | |
1769 | lcs_notify_lancmd_waiters(card, cmd); | |
1770 | } | |
1771 | ||
1772 | /** | |
1773 | * Unpack network packet. | |
1774 | */ | |
1775 | static void | |
1776 | lcs_get_skb(struct lcs_card *card, char *skb_data, unsigned int skb_len) | |
1777 | { | |
1778 | struct sk_buff *skb; | |
1779 | ||
1780 | LCS_DBF_TEXT(5, trace, "getskb"); | |
1781 | if (card->dev == NULL || | |
1782 | card->state != DEV_STATE_UP) | |
1783 | /* The card isn't up. Ignore the packet. */ | |
1784 | return; | |
1785 | ||
1786 | skb = dev_alloc_skb(skb_len); | |
1787 | if (skb == NULL) { | |
1788 | PRINT_ERR("LCS: alloc_skb failed for device=%s\n", | |
1789 | card->dev->name); | |
1790 | card->stats.rx_dropped++; | |
1791 | return; | |
1792 | } | |
1da177e4 LT |
1793 | memcpy(skb_put(skb, skb_len), skb_data, skb_len); |
1794 | skb->protocol = card->lan_type_trans(skb, card->dev); | |
1795 | card->stats.rx_bytes += skb_len; | |
1796 | card->stats.rx_packets++; | |
93ad37d9 KW |
1797 | if (skb->protocol == htons(ETH_P_802_2)) |
1798 | *((__u32 *)skb->cb) = ++card->pkt_seq; | |
1da177e4 LT |
1799 | netif_rx(skb); |
1800 | } | |
1801 | ||
1802 | /** | |
1803 | * LCS main routine to get packets and lancmd replies from the buffers | |
1804 | */ | |
1805 | static void | |
1806 | lcs_get_frames_cb(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
1807 | { | |
1808 | struct lcs_card *card; | |
1809 | struct lcs_header *lcs_hdr; | |
1810 | __u16 offset; | |
1811 | ||
1812 | LCS_DBF_TEXT(5, trace, "lcsgtpkt"); | |
1813 | lcs_hdr = (struct lcs_header *) buffer->data; | |
1814 | if (lcs_hdr->offset == LCS_ILLEGAL_OFFSET) { | |
1815 | LCS_DBF_TEXT(4, trace, "-eiogpkt"); | |
1816 | return; | |
1817 | } | |
b385a144 | 1818 | card = container_of(channel, struct lcs_card, read); |
1da177e4 LT |
1819 | offset = 0; |
1820 | while (lcs_hdr->offset != 0) { | |
1821 | if (lcs_hdr->offset <= 0 || | |
1822 | lcs_hdr->offset > LCS_IOBUFFERSIZE || | |
1823 | lcs_hdr->offset < offset) { | |
1824 | /* Offset invalid. */ | |
1825 | card->stats.rx_length_errors++; | |
1826 | card->stats.rx_errors++; | |
1827 | return; | |
1828 | } | |
1829 | /* What kind of frame is it? */ | |
1830 | if (lcs_hdr->type == LCS_FRAME_TYPE_CONTROL) | |
1831 | /* Control frame. */ | |
1832 | lcs_get_control(card, (struct lcs_cmd *) lcs_hdr); | |
1833 | else if (lcs_hdr->type == LCS_FRAME_TYPE_ENET || | |
1834 | lcs_hdr->type == LCS_FRAME_TYPE_TR || | |
1835 | lcs_hdr->type == LCS_FRAME_TYPE_FDDI) | |
1836 | /* Normal network packet. */ | |
1837 | lcs_get_skb(card, (char *)(lcs_hdr + 1), | |
1838 | lcs_hdr->offset - offset - | |
1839 | sizeof(struct lcs_header)); | |
1840 | else | |
1841 | /* Unknown frame type. */ | |
1842 | ; // FIXME: error message ? | |
1843 | /* Proceed to next frame. */ | |
1844 | offset = lcs_hdr->offset; | |
1845 | lcs_hdr->offset = LCS_ILLEGAL_OFFSET; | |
1846 | lcs_hdr = (struct lcs_header *) (buffer->data + offset); | |
1847 | } | |
1848 | /* The buffer is now empty. Make it ready again. */ | |
1849 | lcs_ready_buffer(&card->read, buffer); | |
1850 | } | |
1851 | ||
1852 | /** | |
1853 | * get network statistics for ifconfig and other user programs | |
1854 | */ | |
1855 | static struct net_device_stats * | |
1856 | lcs_getstats(struct net_device *dev) | |
1857 | { | |
1858 | struct lcs_card *card; | |
1859 | ||
1860 | LCS_DBF_TEXT(4, trace, "netstats"); | |
1861 | card = (struct lcs_card *) dev->priv; | |
1862 | return &card->stats; | |
1863 | } | |
1864 | ||
1865 | /** | |
1866 | * stop lcs device | |
1867 | * This function will be called by user doing ifconfig xxx down | |
1868 | */ | |
1869 | static int | |
1870 | lcs_stop_device(struct net_device *dev) | |
1871 | { | |
1872 | struct lcs_card *card; | |
1873 | int rc; | |
1874 | ||
1875 | LCS_DBF_TEXT(2, trace, "stopdev"); | |
1876 | card = (struct lcs_card *) dev->priv; | |
27eb5ac8 KW |
1877 | netif_carrier_off(dev); |
1878 | netif_tx_disable(dev); | |
1da177e4 | 1879 | dev->flags &= ~IFF_UP; |
27eb5ac8 | 1880 | wait_event(card->write.wait_q, |
9163bb2e | 1881 | (card->write.state != LCS_CH_STATE_RUNNING)); |
1da177e4 LT |
1882 | rc = lcs_stopcard(card); |
1883 | if (rc) | |
1884 | PRINT_ERR("Try it again!\n "); | |
1885 | return rc; | |
1886 | } | |
1887 | ||
1888 | /** | |
1889 | * start lcs device and make it runnable | |
1890 | * This function will be called by user doing ifconfig xxx up | |
1891 | */ | |
1892 | static int | |
1893 | lcs_open_device(struct net_device *dev) | |
1894 | { | |
1895 | struct lcs_card *card; | |
1896 | int rc; | |
1897 | ||
1898 | LCS_DBF_TEXT(2, trace, "opendev"); | |
1899 | card = (struct lcs_card *) dev->priv; | |
1900 | /* initialize statistics */ | |
1901 | rc = lcs_detect(card); | |
1902 | if (rc) { | |
1903 | PRINT_ERR("LCS:Error in opening device!\n"); | |
1904 | ||
1905 | } else { | |
1906 | dev->flags |= IFF_UP; | |
27eb5ac8 | 1907 | netif_carrier_on(dev); |
1da177e4 LT |
1908 | netif_wake_queue(dev); |
1909 | card->state = DEV_STATE_UP; | |
1910 | } | |
1911 | return rc; | |
1912 | } | |
1913 | ||
1914 | /** | |
1915 | * show function for portno called by cat or similar things | |
1916 | */ | |
1917 | static ssize_t | |
3fd3c0a5 | 1918 | lcs_portno_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1919 | { |
1920 | struct lcs_card *card; | |
1921 | ||
1922 | card = (struct lcs_card *)dev->driver_data; | |
1923 | ||
1924 | if (!card) | |
1925 | return 0; | |
1926 | ||
1927 | return sprintf(buf, "%d\n", card->portno); | |
1928 | } | |
1929 | ||
1930 | /** | |
1931 | * store the value which is piped to file portno | |
1932 | */ | |
1933 | static ssize_t | |
3fd3c0a5 | 1934 | lcs_portno_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1935 | { |
1936 | struct lcs_card *card; | |
1937 | int value; | |
1938 | ||
1939 | card = (struct lcs_card *)dev->driver_data; | |
1940 | ||
1941 | if (!card) | |
1942 | return 0; | |
1943 | ||
1944 | sscanf(buf, "%u", &value); | |
1945 | /* TODO: sanity checks */ | |
1946 | card->portno = value; | |
1947 | ||
1948 | return count; | |
1949 | ||
1950 | } | |
1951 | ||
1952 | static DEVICE_ATTR(portno, 0644, lcs_portno_show, lcs_portno_store); | |
1953 | ||
1954 | static ssize_t | |
3fd3c0a5 | 1955 | lcs_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1956 | { |
1957 | struct ccwgroup_device *cgdev; | |
1958 | ||
1959 | cgdev = to_ccwgroupdev(dev); | |
1960 | if (!cgdev) | |
1961 | return -ENODEV; | |
1962 | ||
1963 | return sprintf(buf, "%s\n", cu3088_type[cgdev->cdev[0]->id.driver_info]); | |
1964 | } | |
1965 | ||
1966 | static DEVICE_ATTR(type, 0444, lcs_type_show, NULL); | |
1967 | ||
1968 | static ssize_t | |
3fd3c0a5 | 1969 | lcs_timeout_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1970 | { |
1971 | struct lcs_card *card; | |
1972 | ||
1973 | card = (struct lcs_card *)dev->driver_data; | |
1974 | ||
1975 | return card ? sprintf(buf, "%u\n", card->lancmd_timeout) : 0; | |
1976 | } | |
1977 | ||
1978 | static ssize_t | |
3fd3c0a5 | 1979 | lcs_timeout_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1980 | { |
1981 | struct lcs_card *card; | |
1982 | int value; | |
1983 | ||
1984 | card = (struct lcs_card *)dev->driver_data; | |
1985 | ||
1986 | if (!card) | |
1987 | return 0; | |
1988 | ||
1989 | sscanf(buf, "%u", &value); | |
1990 | /* TODO: sanity checks */ | |
1991 | card->lancmd_timeout = value; | |
1992 | ||
1993 | return count; | |
1994 | ||
1995 | } | |
1996 | ||
2b67fc46 | 1997 | static DEVICE_ATTR(lancmd_timeout, 0644, lcs_timeout_show, lcs_timeout_store); |
1da177e4 | 1998 | |
27eb5ac8 | 1999 | static ssize_t |
e82b0f2c | 2000 | lcs_dev_recover_store(struct device *dev, struct device_attribute *attr, |
27eb5ac8 KW |
2001 | const char *buf, size_t count) |
2002 | { | |
2003 | struct lcs_card *card = dev->driver_data; | |
2004 | char *tmp; | |
2005 | int i; | |
2006 | ||
2007 | if (!card) | |
2008 | return -EINVAL; | |
2009 | if (card->state != DEV_STATE_UP) | |
2010 | return -EPERM; | |
2011 | i = simple_strtoul(buf, &tmp, 16); | |
2012 | if (i == 1) | |
2013 | lcs_schedule_recovery(card); | |
2014 | return count; | |
2015 | } | |
2016 | ||
2017 | static DEVICE_ATTR(recover, 0200, NULL, lcs_dev_recover_store); | |
2018 | ||
1da177e4 LT |
2019 | static struct attribute * lcs_attrs[] = { |
2020 | &dev_attr_portno.attr, | |
2021 | &dev_attr_type.attr, | |
2022 | &dev_attr_lancmd_timeout.attr, | |
27eb5ac8 | 2023 | &dev_attr_recover.attr, |
1da177e4 LT |
2024 | NULL, |
2025 | }; | |
2026 | ||
2027 | static struct attribute_group lcs_attr_group = { | |
2028 | .attrs = lcs_attrs, | |
2029 | }; | |
2030 | ||
2031 | /** | |
2032 | * lcs_probe_device is called on establishing a new ccwgroup_device. | |
2033 | */ | |
2034 | static int | |
2035 | lcs_probe_device(struct ccwgroup_device *ccwgdev) | |
2036 | { | |
2037 | struct lcs_card *card; | |
2038 | int ret; | |
2039 | ||
2040 | if (!get_device(&ccwgdev->dev)) | |
2041 | return -ENODEV; | |
2042 | ||
2043 | LCS_DBF_TEXT(2, setup, "add_dev"); | |
2044 | card = lcs_alloc_card(); | |
2045 | if (!card) { | |
6b648063 | 2046 | LCS_DBF_TEXT_(2, setup, " rc%d", -ENOMEM); |
1da177e4 LT |
2047 | put_device(&ccwgdev->dev); |
2048 | return -ENOMEM; | |
2049 | } | |
2050 | ret = sysfs_create_group(&ccwgdev->dev.kobj, &lcs_attr_group); | |
2051 | if (ret) { | |
1da177e4 LT |
2052 | lcs_free_card(card); |
2053 | put_device(&ccwgdev->dev); | |
2054 | return ret; | |
2055 | } | |
2056 | ccwgdev->dev.driver_data = card; | |
2057 | ccwgdev->cdev[0]->handler = lcs_irq; | |
2058 | ccwgdev->cdev[1]->handler = lcs_irq; | |
27eb5ac8 | 2059 | card->gdev = ccwgdev; |
4927b3f7 | 2060 | INIT_WORK(&card->kernel_thread_starter, lcs_start_kernel_thread); |
27eb5ac8 KW |
2061 | card->thread_start_mask = 0; |
2062 | card->thread_allowed_mask = 0; | |
2063 | card->thread_running_mask = 0; | |
1da177e4 LT |
2064 | return 0; |
2065 | } | |
2066 | ||
2067 | static int | |
2068 | lcs_register_netdev(struct ccwgroup_device *ccwgdev) | |
2069 | { | |
2070 | struct lcs_card *card; | |
2071 | ||
2072 | LCS_DBF_TEXT(2, setup, "regnetdv"); | |
2073 | card = (struct lcs_card *)ccwgdev->dev.driver_data; | |
2074 | if (card->dev->reg_state != NETREG_UNINITIALIZED) | |
2075 | return 0; | |
2076 | SET_NETDEV_DEV(card->dev, &ccwgdev->dev); | |
2077 | return register_netdev(card->dev); | |
2078 | } | |
2079 | ||
2080 | /** | |
2081 | * lcs_new_device will be called by setting the group device online. | |
2082 | */ | |
2083 | ||
2084 | static int | |
2085 | lcs_new_device(struct ccwgroup_device *ccwgdev) | |
2086 | { | |
2087 | struct lcs_card *card; | |
2088 | struct net_device *dev=NULL; | |
2089 | enum lcs_dev_states recover_state; | |
2090 | int rc; | |
2091 | ||
2092 | card = (struct lcs_card *)ccwgdev->dev.driver_data; | |
2093 | if (!card) | |
2094 | return -ENODEV; | |
2095 | ||
2096 | LCS_DBF_TEXT(2, setup, "newdev"); | |
2097 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2098 | card->read.ccwdev = ccwgdev->cdev[0]; | |
2099 | card->write.ccwdev = ccwgdev->cdev[1]; | |
2100 | ||
2101 | recover_state = card->state; | |
2102 | ccw_device_set_online(card->read.ccwdev); | |
2103 | ccw_device_set_online(card->write.ccwdev); | |
2104 | ||
2105 | LCS_DBF_TEXT(3, setup, "lcsnewdv"); | |
2106 | ||
2107 | lcs_setup_card(card); | |
2108 | rc = lcs_detect(card); | |
2109 | if (rc) { | |
2110 | LCS_DBF_TEXT(2, setup, "dtctfail"); | |
2111 | PRINT_WARN("Detection of LCS card failed with return code " | |
2112 | "%d (0x%x)\n", rc, rc); | |
2113 | lcs_stopcard(card); | |
2114 | goto out; | |
2115 | } | |
2116 | if (card->dev) { | |
2117 | LCS_DBF_TEXT(2, setup, "samedev"); | |
2118 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2119 | goto netdev_out; | |
2120 | } | |
2121 | switch (card->lan_type) { | |
2122 | #ifdef CONFIG_NET_ETHERNET | |
2123 | case LCS_FRAME_TYPE_ENET: | |
2124 | card->lan_type_trans = eth_type_trans; | |
2125 | dev = alloc_etherdev(0); | |
2126 | break; | |
2127 | #endif | |
2128 | #ifdef CONFIG_TR | |
2129 | case LCS_FRAME_TYPE_TR: | |
2130 | card->lan_type_trans = tr_type_trans; | |
2131 | dev = alloc_trdev(0); | |
2132 | break; | |
2133 | #endif | |
2134 | #ifdef CONFIG_FDDI | |
2135 | case LCS_FRAME_TYPE_FDDI: | |
2136 | card->lan_type_trans = fddi_type_trans; | |
2137 | dev = alloc_fddidev(0); | |
2138 | break; | |
2139 | #endif | |
2140 | default: | |
2141 | LCS_DBF_TEXT(3, setup, "errinit"); | |
2142 | PRINT_ERR("LCS: Initialization failed\n"); | |
1da177e4 LT |
2143 | goto out; |
2144 | } | |
2145 | if (!dev) | |
2146 | goto out; | |
2147 | card->dev = dev; | |
1da177e4 LT |
2148 | card->dev->priv = card; |
2149 | card->dev->open = lcs_open_device; | |
2150 | card->dev->stop = lcs_stop_device; | |
2151 | card->dev->hard_start_xmit = lcs_start_xmit; | |
2152 | card->dev->get_stats = lcs_getstats; | |
1da177e4 LT |
2153 | memcpy(card->dev->dev_addr, card->mac, LCS_MAC_LENGTH); |
2154 | #ifdef CONFIG_IP_MULTICAST | |
2155 | if (!lcs_check_multicast_support(card)) | |
2156 | card->dev->set_multicast_list = lcs_set_multicast_list; | |
2157 | #endif | |
b5f9d55b | 2158 | netdev_out: |
1da177e4 LT |
2159 | lcs_set_allowed_threads(card,0xffffffff); |
2160 | if (recover_state == DEV_STATE_RECOVER) { | |
2161 | lcs_set_multicast_list(card->dev); | |
2162 | card->dev->flags |= IFF_UP; | |
27eb5ac8 | 2163 | netif_carrier_on(card->dev); |
1da177e4 LT |
2164 | netif_wake_queue(card->dev); |
2165 | card->state = DEV_STATE_UP; | |
b5f9d55b | 2166 | } else { |
1da177e4 | 2167 | lcs_stopcard(card); |
b5f9d55b | 2168 | } |
1da177e4 | 2169 | |
b5f9d55b FP |
2170 | if (lcs_register_netdev(ccwgdev) != 0) |
2171 | goto out; | |
2172 | ||
2173 | /* Print out supported assists: IPv6 */ | |
2174 | PRINT_INFO("LCS device %s %s IPv6 support\n", card->dev->name, | |
2175 | (card->ip_assists_supported & LCS_IPASS_IPV6_SUPPORT) ? | |
2176 | "with" : "without"); | |
2177 | /* Print out supported assist: Multicast */ | |
2178 | PRINT_INFO("LCS device %s %s Multicast support\n", card->dev->name, | |
2179 | (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) ? | |
2180 | "with" : "without"); | |
1da177e4 LT |
2181 | return 0; |
2182 | out: | |
2183 | ||
2184 | ccw_device_set_offline(card->read.ccwdev); | |
2185 | ccw_device_set_offline(card->write.ccwdev); | |
2186 | return -ENODEV; | |
2187 | } | |
2188 | ||
2189 | /** | |
2190 | * lcs_shutdown_device, called when setting the group device offline. | |
2191 | */ | |
2192 | static int | |
27eb5ac8 | 2193 | __lcs_shutdown_device(struct ccwgroup_device *ccwgdev, int recovery_mode) |
1da177e4 LT |
2194 | { |
2195 | struct lcs_card *card; | |
2196 | enum lcs_dev_states recover_state; | |
2197 | int ret; | |
2198 | ||
2199 | LCS_DBF_TEXT(3, setup, "shtdndev"); | |
2200 | card = (struct lcs_card *)ccwgdev->dev.driver_data; | |
2201 | if (!card) | |
2202 | return -ENODEV; | |
27eb5ac8 KW |
2203 | if (recovery_mode == 0) { |
2204 | lcs_set_allowed_threads(card, 0); | |
2205 | if (lcs_wait_for_threads(card, LCS_SET_MC_THREAD)) | |
2206 | return -ERESTARTSYS; | |
2207 | } | |
1da177e4 LT |
2208 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); |
2209 | recover_state = card->state; | |
2210 | ||
2211 | ret = lcs_stop_device(card->dev); | |
2212 | ret = ccw_device_set_offline(card->read.ccwdev); | |
2213 | ret = ccw_device_set_offline(card->write.ccwdev); | |
2214 | if (recover_state == DEV_STATE_UP) { | |
2215 | card->state = DEV_STATE_RECOVER; | |
2216 | } | |
2217 | if (ret) | |
2218 | return ret; | |
2219 | return 0; | |
2220 | } | |
2221 | ||
27eb5ac8 KW |
2222 | static int |
2223 | lcs_shutdown_device(struct ccwgroup_device *ccwgdev) | |
2224 | { | |
2225 | return __lcs_shutdown_device(ccwgdev, 0); | |
2226 | } | |
2227 | ||
2228 | /** | |
2229 | * drive lcs recovery after startup and startlan initiated by Lan Gateway | |
2230 | */ | |
2231 | static int | |
2232 | lcs_recovery(void *ptr) | |
2233 | { | |
2234 | struct lcs_card *card; | |
2235 | struct ccwgroup_device *gdev; | |
2236 | int rc; | |
2237 | ||
2238 | card = (struct lcs_card *) ptr; | |
2239 | daemonize("lcs_recover"); | |
2240 | ||
2241 | LCS_DBF_TEXT(4, trace, "recover1"); | |
2242 | if (!lcs_do_run_thread(card, LCS_RECOVERY_THREAD)) | |
2243 | return 0; | |
2244 | LCS_DBF_TEXT(4, trace, "recover2"); | |
2245 | gdev = card->gdev; | |
2246 | PRINT_WARN("Recovery of device %s started...\n", gdev->dev.bus_id); | |
2247 | rc = __lcs_shutdown_device(gdev, 1); | |
2248 | rc = lcs_new_device(gdev); | |
2249 | if (!rc) | |
2250 | PRINT_INFO("Device %s successfully recovered!\n", | |
2251 | card->dev->name); | |
2252 | else | |
2253 | PRINT_INFO("Device %s could not be recovered!\n", | |
2254 | card->dev->name); | |
2255 | lcs_clear_thread_running_bit(card, LCS_RECOVERY_THREAD); | |
2256 | return 0; | |
2257 | } | |
2258 | ||
1da177e4 LT |
2259 | /** |
2260 | * lcs_remove_device, free buffers and card | |
2261 | */ | |
2262 | static void | |
2263 | lcs_remove_device(struct ccwgroup_device *ccwgdev) | |
2264 | { | |
2265 | struct lcs_card *card; | |
2266 | ||
2267 | card = (struct lcs_card *)ccwgdev->dev.driver_data; | |
2268 | if (!card) | |
2269 | return; | |
2270 | ||
1da177e4 LT |
2271 | LCS_DBF_TEXT(3, setup, "remdev"); |
2272 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2273 | if (ccwgdev->state == CCWGROUP_ONLINE) { | |
2274 | lcs_shutdown_device(ccwgdev); | |
2275 | } | |
2276 | if (card->dev) | |
2277 | unregister_netdev(card->dev); | |
2278 | sysfs_remove_group(&ccwgdev->dev.kobj, &lcs_attr_group); | |
2279 | lcs_cleanup_card(card); | |
2280 | lcs_free_card(card); | |
2281 | put_device(&ccwgdev->dev); | |
2282 | } | |
2283 | ||
2284 | /** | |
2285 | * LCS ccwgroup driver registration | |
2286 | */ | |
2287 | static struct ccwgroup_driver lcs_group_driver = { | |
2288 | .owner = THIS_MODULE, | |
2289 | .name = "lcs", | |
2290 | .max_slaves = 2, | |
2291 | .driver_id = 0xD3C3E2, | |
2292 | .probe = lcs_probe_device, | |
2293 | .remove = lcs_remove_device, | |
2294 | .set_online = lcs_new_device, | |
2295 | .set_offline = lcs_shutdown_device, | |
2296 | }; | |
2297 | ||
2298 | /** | |
2299 | * LCS Module/Kernel initialization function | |
2300 | */ | |
2301 | static int | |
2302 | __init lcs_init_module(void) | |
2303 | { | |
2304 | int rc; | |
2305 | ||
2306 | PRINT_INFO("Loading %s\n",version); | |
2307 | rc = lcs_register_debug_facility(); | |
2308 | LCS_DBF_TEXT(0, setup, "lcsinit"); | |
2309 | if (rc) { | |
2310 | PRINT_ERR("Initialization failed\n"); | |
2311 | return rc; | |
2312 | } | |
2313 | ||
2314 | rc = register_cu3088_discipline(&lcs_group_driver); | |
2315 | if (rc) { | |
2316 | PRINT_ERR("Initialization failed\n"); | |
2317 | return rc; | |
2318 | } | |
1da177e4 LT |
2319 | return 0; |
2320 | } | |
2321 | ||
2322 | ||
2323 | /** | |
2324 | * LCS module cleanup function | |
2325 | */ | |
2326 | static void | |
2327 | __exit lcs_cleanup_module(void) | |
2328 | { | |
2329 | PRINT_INFO("Terminating lcs module.\n"); | |
2330 | LCS_DBF_TEXT(0, trace, "cleanup"); | |
2331 | unregister_cu3088_discipline(&lcs_group_driver); | |
2332 | lcs_unregister_debug_facility(); | |
2333 | } | |
2334 | ||
2335 | module_init(lcs_init_module); | |
2336 | module_exit(lcs_cleanup_module); | |
2337 | ||
1387780f | 2338 | MODULE_AUTHOR("Frank Pavlic <fpavlic@de.ibm.com>"); |
1da177e4 LT |
2339 | MODULE_LICENSE("GPL"); |
2340 |