Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Linux for S/390 Lan Channel Station Network Driver |
3 | * | |
cbb2aec3 KDW |
4 | * Copyright IBM Corp. 1999, 2009 |
5 | * Author(s): Original Code written by | |
6 | * DJ Barrow <djbarrow@de.ibm.com,barrow_dj@yahoo.com> | |
7 | * Rewritten by | |
8 | * Frank Pavlic <fpavlic@de.ibm.com> and | |
9 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
1da177e4 | 10 | * |
1da177e4 LT |
11 | * This program is free software; you can redistribute it and/or modify |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2, or (at your option) | |
14 | * any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | */ | |
25 | ||
c99fc5da KW |
26 | #define KMSG_COMPONENT "lcs" |
27 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
28 | ||
1da177e4 LT |
29 | #include <linux/module.h> |
30 | #include <linux/if.h> | |
31 | #include <linux/netdevice.h> | |
32 | #include <linux/etherdevice.h> | |
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> | |
e5b5719b | 39 | #include <linux/kthread.h> |
1da177e4 LT |
40 | #include <net/arp.h> |
41 | #include <net/ip.h> | |
42 | ||
43 | #include <asm/debug.h> | |
44 | #include <asm/idals.h> | |
45 | #include <asm/timex.h> | |
46 | #include <linux/device.h> | |
47 | #include <asm/ccwgroup.h> | |
48 | ||
49 | #include "lcs.h" | |
50 | #include "cu3088.h" | |
51 | ||
52 | ||
53 | #if !defined(CONFIG_NET_ETHERNET) && \ | |
54 | !defined(CONFIG_TR) && !defined(CONFIG_FDDI) | |
55 | #error Cannot compile lcs.c without some net devices switched on. | |
56 | #endif | |
57 | ||
58 | /** | |
59 | * initialization string for output | |
60 | */ | |
1da177e4 | 61 | |
e018ba1f | 62 | static char version[] __initdata = "LCS driver"; |
1da177e4 LT |
63 | static char debug_buffer[255]; |
64 | ||
65 | /** | |
66 | * Some prototypes. | |
67 | */ | |
68 | static void lcs_tasklet(unsigned long); | |
4927b3f7 | 69 | static void lcs_start_kernel_thread(struct work_struct *); |
1da177e4 | 70 | static void lcs_get_frames_cb(struct lcs_channel *, struct lcs_buffer *); |
801599b0 | 71 | #ifdef CONFIG_IP_MULTICAST |
1da177e4 | 72 | static int lcs_send_delipm(struct lcs_card *, struct lcs_ipm_list *); |
801599b0 | 73 | #endif /* CONFIG_IP_MULTICAST */ |
27eb5ac8 | 74 | static int lcs_recovery(void *ptr); |
1da177e4 LT |
75 | |
76 | /** | |
77 | * Debug Facility Stuff | |
78 | */ | |
79 | static debug_info_t *lcs_dbf_setup; | |
80 | static debug_info_t *lcs_dbf_trace; | |
81 | ||
82 | /** | |
83 | * LCS Debug Facility functions | |
84 | */ | |
85 | static void | |
86 | lcs_unregister_debug_facility(void) | |
87 | { | |
88 | if (lcs_dbf_setup) | |
89 | debug_unregister(lcs_dbf_setup); | |
90 | if (lcs_dbf_trace) | |
91 | debug_unregister(lcs_dbf_trace); | |
92 | } | |
93 | ||
94 | static int | |
95 | lcs_register_debug_facility(void) | |
96 | { | |
66a464db | 97 | lcs_dbf_setup = debug_register("lcs_setup", 2, 1, 8); |
164b0fb1 | 98 | lcs_dbf_trace = debug_register("lcs_trace", 4, 1, 8); |
1da177e4 | 99 | if (lcs_dbf_setup == NULL || lcs_dbf_trace == NULL) { |
c99fc5da | 100 | pr_err("Not enough memory for debug facility.\n"); |
1da177e4 LT |
101 | lcs_unregister_debug_facility(); |
102 | return -ENOMEM; | |
103 | } | |
104 | debug_register_view(lcs_dbf_setup, &debug_hex_ascii_view); | |
0d613a27 | 105 | debug_set_level(lcs_dbf_setup, 2); |
1da177e4 | 106 | debug_register_view(lcs_dbf_trace, &debug_hex_ascii_view); |
0d613a27 | 107 | debug_set_level(lcs_dbf_trace, 2); |
1da177e4 LT |
108 | return 0; |
109 | } | |
110 | ||
111 | /** | |
112 | * Allocate io buffers. | |
113 | */ | |
114 | static int | |
115 | lcs_alloc_channel(struct lcs_channel *channel) | |
116 | { | |
117 | int cnt; | |
118 | ||
119 | LCS_DBF_TEXT(2, setup, "ichalloc"); | |
120 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
121 | /* alloc memory fo iobuffer */ | |
88abaab4 ES |
122 | channel->iob[cnt].data = |
123 | kzalloc(LCS_IOBUFFERSIZE, GFP_DMA | GFP_KERNEL); | |
1da177e4 LT |
124 | if (channel->iob[cnt].data == NULL) |
125 | break; | |
9163bb2e | 126 | channel->iob[cnt].state = LCS_BUF_STATE_EMPTY; |
1da177e4 LT |
127 | } |
128 | if (cnt < LCS_NUM_BUFFS) { | |
129 | /* Not all io buffers could be allocated. */ | |
130 | LCS_DBF_TEXT(2, setup, "echalloc"); | |
131 | while (cnt-- > 0) | |
132 | kfree(channel->iob[cnt].data); | |
133 | return -ENOMEM; | |
134 | } | |
135 | return 0; | |
136 | } | |
137 | ||
138 | /** | |
139 | * Free io buffers. | |
140 | */ | |
141 | static void | |
142 | lcs_free_channel(struct lcs_channel *channel) | |
143 | { | |
144 | int cnt; | |
145 | ||
146 | LCS_DBF_TEXT(2, setup, "ichfree"); | |
147 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
17fd682e | 148 | kfree(channel->iob[cnt].data); |
1da177e4 LT |
149 | channel->iob[cnt].data = NULL; |
150 | } | |
151 | } | |
152 | ||
153 | /* | |
154 | * Cleanup channel. | |
155 | */ | |
156 | static void | |
157 | lcs_cleanup_channel(struct lcs_channel *channel) | |
158 | { | |
159 | LCS_DBF_TEXT(3, setup, "cleanch"); | |
160 | /* Kill write channel tasklets. */ | |
161 | tasklet_kill(&channel->irq_tasklet); | |
162 | /* Free channel buffers. */ | |
163 | lcs_free_channel(channel); | |
164 | } | |
165 | ||
166 | /** | |
167 | * LCS free memory for card and channels. | |
168 | */ | |
169 | static void | |
170 | lcs_free_card(struct lcs_card *card) | |
171 | { | |
172 | LCS_DBF_TEXT(2, setup, "remcard"); | |
173 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
174 | kfree(card); | |
175 | } | |
176 | ||
177 | /** | |
178 | * LCS alloc memory for card and channels | |
179 | */ | |
180 | static struct lcs_card * | |
181 | lcs_alloc_card(void) | |
182 | { | |
183 | struct lcs_card *card; | |
184 | int rc; | |
185 | ||
186 | LCS_DBF_TEXT(2, setup, "alloclcs"); | |
187 | ||
88abaab4 | 188 | card = kzalloc(sizeof(struct lcs_card), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
189 | if (card == NULL) |
190 | return NULL; | |
1da177e4 LT |
191 | card->lan_type = LCS_FRAME_TYPE_AUTO; |
192 | card->pkt_seq = 0; | |
193 | card->lancmd_timeout = LCS_LANCMD_TIMEOUT_DEFAULT; | |
194 | /* Allocate io buffers for the read channel. */ | |
195 | rc = lcs_alloc_channel(&card->read); | |
196 | if (rc){ | |
197 | LCS_DBF_TEXT(2, setup, "iccwerr"); | |
198 | lcs_free_card(card); | |
199 | return NULL; | |
200 | } | |
201 | /* Allocate io buffers for the write channel. */ | |
202 | rc = lcs_alloc_channel(&card->write); | |
203 | if (rc) { | |
204 | LCS_DBF_TEXT(2, setup, "iccwerr"); | |
205 | lcs_cleanup_channel(&card->read); | |
206 | lcs_free_card(card); | |
207 | return NULL; | |
208 | } | |
209 | ||
210 | #ifdef CONFIG_IP_MULTICAST | |
211 | INIT_LIST_HEAD(&card->ipm_list); | |
212 | #endif | |
213 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
214 | return card; | |
215 | } | |
216 | ||
217 | /* | |
218 | * Setup read channel. | |
219 | */ | |
220 | static void | |
221 | lcs_setup_read_ccws(struct lcs_card *card) | |
222 | { | |
223 | int cnt; | |
224 | ||
225 | LCS_DBF_TEXT(2, setup, "ireadccw"); | |
226 | /* Setup read ccws. */ | |
227 | memset(card->read.ccws, 0, sizeof (struct ccw1) * (LCS_NUM_BUFFS + 1)); | |
228 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
229 | card->read.ccws[cnt].cmd_code = LCS_CCW_READ; | |
230 | card->read.ccws[cnt].count = LCS_IOBUFFERSIZE; | |
231 | card->read.ccws[cnt].flags = | |
232 | CCW_FLAG_CC | CCW_FLAG_SLI | CCW_FLAG_PCI; | |
233 | /* | |
234 | * Note: we have allocated the buffer with GFP_DMA, so | |
235 | * we do not need to do set_normalized_cda. | |
236 | */ | |
237 | card->read.ccws[cnt].cda = | |
238 | (__u32) __pa(card->read.iob[cnt].data); | |
239 | ((struct lcs_header *) | |
240 | card->read.iob[cnt].data)->offset = LCS_ILLEGAL_OFFSET; | |
241 | card->read.iob[cnt].callback = lcs_get_frames_cb; | |
9163bb2e | 242 | card->read.iob[cnt].state = LCS_BUF_STATE_READY; |
1da177e4 LT |
243 | card->read.iob[cnt].count = LCS_IOBUFFERSIZE; |
244 | } | |
245 | card->read.ccws[0].flags &= ~CCW_FLAG_PCI; | |
246 | card->read.ccws[LCS_NUM_BUFFS - 1].flags &= ~CCW_FLAG_PCI; | |
247 | card->read.ccws[LCS_NUM_BUFFS - 1].flags |= CCW_FLAG_SUSPEND; | |
248 | /* Last ccw is a tic (transfer in channel). */ | |
249 | card->read.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER; | |
250 | card->read.ccws[LCS_NUM_BUFFS].cda = | |
251 | (__u32) __pa(card->read.ccws); | |
252 | /* Setg initial state of the read channel. */ | |
9163bb2e | 253 | card->read.state = LCS_CH_STATE_INIT; |
1da177e4 LT |
254 | |
255 | card->read.io_idx = 0; | |
256 | card->read.buf_idx = 0; | |
257 | } | |
258 | ||
259 | static void | |
260 | lcs_setup_read(struct lcs_card *card) | |
261 | { | |
262 | LCS_DBF_TEXT(3, setup, "initread"); | |
263 | ||
264 | lcs_setup_read_ccws(card); | |
265 | /* Initialize read channel tasklet. */ | |
266 | card->read.irq_tasklet.data = (unsigned long) &card->read; | |
267 | card->read.irq_tasklet.func = lcs_tasklet; | |
268 | /* Initialize waitqueue. */ | |
269 | init_waitqueue_head(&card->read.wait_q); | |
270 | } | |
271 | ||
272 | /* | |
273 | * Setup write channel. | |
274 | */ | |
275 | static void | |
276 | lcs_setup_write_ccws(struct lcs_card *card) | |
277 | { | |
278 | int cnt; | |
279 | ||
280 | LCS_DBF_TEXT(3, setup, "iwritccw"); | |
281 | /* Setup write ccws. */ | |
282 | memset(card->write.ccws, 0, sizeof(struct ccw1) * LCS_NUM_BUFFS + 1); | |
283 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
284 | card->write.ccws[cnt].cmd_code = LCS_CCW_WRITE; | |
285 | card->write.ccws[cnt].count = 0; | |
286 | card->write.ccws[cnt].flags = | |
287 | CCW_FLAG_SUSPEND | CCW_FLAG_CC | CCW_FLAG_SLI; | |
288 | /* | |
289 | * Note: we have allocated the buffer with GFP_DMA, so | |
290 | * we do not need to do set_normalized_cda. | |
291 | */ | |
292 | card->write.ccws[cnt].cda = | |
293 | (__u32) __pa(card->write.iob[cnt].data); | |
294 | } | |
295 | /* Last ccw is a tic (transfer in channel). */ | |
296 | card->write.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER; | |
297 | card->write.ccws[LCS_NUM_BUFFS].cda = | |
298 | (__u32) __pa(card->write.ccws); | |
299 | /* Set initial state of the write channel. */ | |
9163bb2e | 300 | card->read.state = LCS_CH_STATE_INIT; |
1da177e4 LT |
301 | |
302 | card->write.io_idx = 0; | |
303 | card->write.buf_idx = 0; | |
304 | } | |
305 | ||
306 | static void | |
307 | lcs_setup_write(struct lcs_card *card) | |
308 | { | |
309 | LCS_DBF_TEXT(3, setup, "initwrit"); | |
310 | ||
311 | lcs_setup_write_ccws(card); | |
312 | /* Initialize write channel tasklet. */ | |
313 | card->write.irq_tasklet.data = (unsigned long) &card->write; | |
314 | card->write.irq_tasklet.func = lcs_tasklet; | |
315 | /* Initialize waitqueue. */ | |
316 | init_waitqueue_head(&card->write.wait_q); | |
317 | } | |
318 | ||
319 | static void | |
320 | lcs_set_allowed_threads(struct lcs_card *card, unsigned long threads) | |
321 | { | |
322 | unsigned long flags; | |
323 | ||
324 | spin_lock_irqsave(&card->mask_lock, flags); | |
325 | card->thread_allowed_mask = threads; | |
326 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
327 | wake_up(&card->wait_q); | |
328 | } | |
329 | static inline int | |
330 | lcs_threads_running(struct lcs_card *card, unsigned long threads) | |
331 | { | |
332 | unsigned long flags; | |
333 | int rc = 0; | |
334 | ||
335 | spin_lock_irqsave(&card->mask_lock, flags); | |
336 | rc = (card->thread_running_mask & threads); | |
337 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
338 | return rc; | |
339 | } | |
340 | ||
341 | static int | |
342 | lcs_wait_for_threads(struct lcs_card *card, unsigned long threads) | |
343 | { | |
344 | return wait_event_interruptible(card->wait_q, | |
345 | lcs_threads_running(card, threads) == 0); | |
346 | } | |
347 | ||
348 | static inline int | |
349 | lcs_set_thread_start_bit(struct lcs_card *card, unsigned long thread) | |
350 | { | |
351 | unsigned long flags; | |
352 | ||
353 | spin_lock_irqsave(&card->mask_lock, flags); | |
354 | if ( !(card->thread_allowed_mask & thread) || | |
355 | (card->thread_start_mask & thread) ) { | |
356 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
357 | return -EPERM; | |
358 | } | |
359 | card->thread_start_mask |= thread; | |
360 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
361 | return 0; | |
362 | } | |
363 | ||
364 | static void | |
365 | lcs_clear_thread_running_bit(struct lcs_card *card, unsigned long thread) | |
366 | { | |
367 | unsigned long flags; | |
368 | ||
369 | spin_lock_irqsave(&card->mask_lock, flags); | |
370 | card->thread_running_mask &= ~thread; | |
371 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
372 | wake_up(&card->wait_q); | |
373 | } | |
374 | ||
375 | static inline int | |
376 | __lcs_do_run_thread(struct lcs_card *card, unsigned long thread) | |
377 | { | |
378 | unsigned long flags; | |
379 | int rc = 0; | |
380 | ||
381 | spin_lock_irqsave(&card->mask_lock, flags); | |
382 | if (card->thread_start_mask & thread){ | |
383 | if ((card->thread_allowed_mask & thread) && | |
384 | !(card->thread_running_mask & thread)){ | |
385 | rc = 1; | |
386 | card->thread_start_mask &= ~thread; | |
387 | card->thread_running_mask |= thread; | |
388 | } else | |
389 | rc = -EPERM; | |
390 | } | |
391 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
392 | return rc; | |
393 | } | |
394 | ||
395 | static int | |
396 | lcs_do_run_thread(struct lcs_card *card, unsigned long thread) | |
397 | { | |
398 | int rc = 0; | |
399 | wait_event(card->wait_q, | |
400 | (rc = __lcs_do_run_thread(card, thread)) >= 0); | |
401 | return rc; | |
402 | } | |
403 | ||
404 | static int | |
405 | lcs_do_start_thread(struct lcs_card *card, unsigned long thread) | |
406 | { | |
407 | unsigned long flags; | |
408 | int rc = 0; | |
409 | ||
410 | spin_lock_irqsave(&card->mask_lock, flags); | |
411 | LCS_DBF_TEXT_(4, trace, " %02x%02x%02x", | |
412 | (u8) card->thread_start_mask, | |
413 | (u8) card->thread_allowed_mask, | |
414 | (u8) card->thread_running_mask); | |
415 | rc = (card->thread_start_mask & thread); | |
416 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
417 | return rc; | |
418 | } | |
419 | ||
420 | /** | |
421 | * Initialize channels,card and state machines. | |
422 | */ | |
423 | static void | |
424 | lcs_setup_card(struct lcs_card *card) | |
425 | { | |
426 | LCS_DBF_TEXT(2, setup, "initcard"); | |
427 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
428 | ||
429 | lcs_setup_read(card); | |
430 | lcs_setup_write(card); | |
431 | /* Set cards initial state. */ | |
432 | card->state = DEV_STATE_DOWN; | |
433 | card->tx_buffer = NULL; | |
434 | card->tx_emitted = 0; | |
435 | ||
1da177e4 LT |
436 | init_waitqueue_head(&card->wait_q); |
437 | spin_lock_init(&card->lock); | |
438 | spin_lock_init(&card->ipm_lock); | |
439 | spin_lock_init(&card->mask_lock); | |
440 | #ifdef CONFIG_IP_MULTICAST | |
441 | INIT_LIST_HEAD(&card->ipm_list); | |
442 | #endif | |
443 | INIT_LIST_HEAD(&card->lancmd_waiters); | |
444 | } | |
445 | ||
446 | static inline void | |
447 | lcs_clear_multicast_list(struct lcs_card *card) | |
448 | { | |
449 | #ifdef CONFIG_IP_MULTICAST | |
450 | struct lcs_ipm_list *ipm; | |
451 | unsigned long flags; | |
452 | ||
453 | /* Free multicast list. */ | |
454 | LCS_DBF_TEXT(3, setup, "clmclist"); | |
455 | spin_lock_irqsave(&card->ipm_lock, flags); | |
456 | while (!list_empty(&card->ipm_list)){ | |
457 | ipm = list_entry(card->ipm_list.next, | |
458 | struct lcs_ipm_list, list); | |
459 | list_del(&ipm->list); | |
460 | if (ipm->ipm_state != LCS_IPM_STATE_SET_REQUIRED){ | |
461 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
462 | lcs_send_delipm(card, ipm); | |
463 | spin_lock_irqsave(&card->ipm_lock, flags); | |
464 | } | |
465 | kfree(ipm); | |
466 | } | |
467 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
468 | #endif | |
469 | } | |
470 | /** | |
471 | * Cleanup channels,card and state machines. | |
472 | */ | |
473 | static void | |
474 | lcs_cleanup_card(struct lcs_card *card) | |
475 | { | |
476 | ||
477 | LCS_DBF_TEXT(3, setup, "cleancrd"); | |
478 | LCS_DBF_HEX(2,setup,&card,sizeof(void*)); | |
479 | ||
480 | if (card->dev != NULL) | |
481 | free_netdev(card->dev); | |
482 | /* Cleanup channels. */ | |
483 | lcs_cleanup_channel(&card->write); | |
484 | lcs_cleanup_channel(&card->read); | |
485 | } | |
486 | ||
487 | /** | |
488 | * Start channel. | |
489 | */ | |
490 | static int | |
491 | lcs_start_channel(struct lcs_channel *channel) | |
492 | { | |
493 | unsigned long flags; | |
494 | int rc; | |
495 | ||
2a0217d5 | 496 | LCS_DBF_TEXT_(4, trace,"ssch%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
497 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
498 | rc = ccw_device_start(channel->ccwdev, | |
499 | channel->ccws + channel->io_idx, 0, 0, | |
500 | DOIO_DENY_PREFETCH | DOIO_ALLOW_SUSPEND); | |
501 | if (rc == 0) | |
9163bb2e | 502 | channel->state = LCS_CH_STATE_RUNNING; |
1da177e4 LT |
503 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); |
504 | if (rc) { | |
2a0217d5 KS |
505 | LCS_DBF_TEXT_(4,trace,"essh%s", |
506 | dev_name(&channel->ccwdev->dev)); | |
c99fc5da KW |
507 | dev_err(&channel->ccwdev->dev, |
508 | "Starting an LCS device resulted in an error," | |
509 | " rc=%d!\n", rc); | |
1da177e4 LT |
510 | } |
511 | return rc; | |
512 | } | |
513 | ||
514 | static int | |
515 | lcs_clear_channel(struct lcs_channel *channel) | |
516 | { | |
517 | unsigned long flags; | |
518 | int rc; | |
519 | ||
520 | LCS_DBF_TEXT(4,trace,"clearch"); | |
2a0217d5 | 521 | LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
522 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
523 | rc = ccw_device_clear(channel->ccwdev, (addr_t) channel); | |
524 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
525 | if (rc) { | |
2a0217d5 KS |
526 | LCS_DBF_TEXT_(4, trace, "ecsc%s", |
527 | dev_name(&channel->ccwdev->dev)); | |
1da177e4 LT |
528 | return rc; |
529 | } | |
9163bb2e UB |
530 | wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_CLEARED)); |
531 | channel->state = LCS_CH_STATE_STOPPED; | |
1da177e4 LT |
532 | return rc; |
533 | } | |
534 | ||
535 | ||
536 | /** | |
537 | * Stop channel. | |
538 | */ | |
539 | static int | |
540 | lcs_stop_channel(struct lcs_channel *channel) | |
541 | { | |
542 | unsigned long flags; | |
543 | int rc; | |
544 | ||
9163bb2e | 545 | if (channel->state == LCS_CH_STATE_STOPPED) |
1da177e4 LT |
546 | return 0; |
547 | LCS_DBF_TEXT(4,trace,"haltsch"); | |
2a0217d5 | 548 | LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev)); |
9163bb2e | 549 | channel->state = LCS_CH_STATE_INIT; |
1da177e4 LT |
550 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
551 | rc = ccw_device_halt(channel->ccwdev, (addr_t) channel); | |
552 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
553 | if (rc) { | |
2a0217d5 KS |
554 | LCS_DBF_TEXT_(4, trace, "ehsc%s", |
555 | dev_name(&channel->ccwdev->dev)); | |
1da177e4 LT |
556 | return rc; |
557 | } | |
558 | /* Asynchronous halt initialted. Wait for its completion. */ | |
9163bb2e | 559 | wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_HALTED)); |
1da177e4 LT |
560 | lcs_clear_channel(channel); |
561 | return 0; | |
562 | } | |
563 | ||
564 | /** | |
565 | * start read and write channel | |
566 | */ | |
567 | static int | |
568 | lcs_start_channels(struct lcs_card *card) | |
569 | { | |
570 | int rc; | |
571 | ||
572 | LCS_DBF_TEXT(2, trace, "chstart"); | |
573 | /* start read channel */ | |
574 | rc = lcs_start_channel(&card->read); | |
575 | if (rc) | |
576 | return rc; | |
577 | /* start write channel */ | |
578 | rc = lcs_start_channel(&card->write); | |
579 | if (rc) | |
580 | lcs_stop_channel(&card->read); | |
581 | return rc; | |
582 | } | |
583 | ||
584 | /** | |
585 | * stop read and write channel | |
586 | */ | |
587 | static int | |
588 | lcs_stop_channels(struct lcs_card *card) | |
589 | { | |
590 | LCS_DBF_TEXT(2, trace, "chhalt"); | |
591 | lcs_stop_channel(&card->read); | |
592 | lcs_stop_channel(&card->write); | |
593 | return 0; | |
594 | } | |
595 | ||
596 | /** | |
597 | * Get empty buffer. | |
598 | */ | |
599 | static struct lcs_buffer * | |
600 | __lcs_get_buffer(struct lcs_channel *channel) | |
601 | { | |
602 | int index; | |
603 | ||
604 | LCS_DBF_TEXT(5, trace, "_getbuff"); | |
605 | index = channel->io_idx; | |
606 | do { | |
9163bb2e UB |
607 | if (channel->iob[index].state == LCS_BUF_STATE_EMPTY) { |
608 | channel->iob[index].state = LCS_BUF_STATE_LOCKED; | |
1da177e4 LT |
609 | return channel->iob + index; |
610 | } | |
611 | index = (index + 1) & (LCS_NUM_BUFFS - 1); | |
612 | } while (index != channel->io_idx); | |
613 | return NULL; | |
614 | } | |
615 | ||
616 | static struct lcs_buffer * | |
617 | lcs_get_buffer(struct lcs_channel *channel) | |
618 | { | |
619 | struct lcs_buffer *buffer; | |
620 | unsigned long flags; | |
621 | ||
622 | LCS_DBF_TEXT(5, trace, "getbuff"); | |
623 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); | |
624 | buffer = __lcs_get_buffer(channel); | |
625 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
626 | return buffer; | |
627 | } | |
628 | ||
629 | /** | |
630 | * Resume channel program if the channel is suspended. | |
631 | */ | |
632 | static int | |
633 | __lcs_resume_channel(struct lcs_channel *channel) | |
634 | { | |
635 | int rc; | |
636 | ||
9163bb2e | 637 | if (channel->state != LCS_CH_STATE_SUSPENDED) |
1da177e4 LT |
638 | return 0; |
639 | if (channel->ccws[channel->io_idx].flags & CCW_FLAG_SUSPEND) | |
640 | return 0; | |
2a0217d5 | 641 | LCS_DBF_TEXT_(5, trace, "rsch%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
642 | rc = ccw_device_resume(channel->ccwdev); |
643 | if (rc) { | |
2a0217d5 KS |
644 | LCS_DBF_TEXT_(4, trace, "ersc%s", |
645 | dev_name(&channel->ccwdev->dev)); | |
c99fc5da KW |
646 | dev_err(&channel->ccwdev->dev, |
647 | "Sending data from the LCS device to the LAN failed" | |
648 | " with rc=%d\n",rc); | |
1da177e4 | 649 | } else |
9163bb2e | 650 | channel->state = LCS_CH_STATE_RUNNING; |
1da177e4 LT |
651 | return rc; |
652 | ||
653 | } | |
654 | ||
655 | /** | |
656 | * Make a buffer ready for processing. | |
657 | */ | |
658 | static inline void | |
659 | __lcs_ready_buffer_bits(struct lcs_channel *channel, int index) | |
660 | { | |
661 | int prev, next; | |
662 | ||
663 | LCS_DBF_TEXT(5, trace, "rdybits"); | |
664 | prev = (index - 1) & (LCS_NUM_BUFFS - 1); | |
665 | next = (index + 1) & (LCS_NUM_BUFFS - 1); | |
666 | /* Check if we may clear the suspend bit of this buffer. */ | |
667 | if (channel->ccws[next].flags & CCW_FLAG_SUSPEND) { | |
668 | /* Check if we have to set the PCI bit. */ | |
669 | if (!(channel->ccws[prev].flags & CCW_FLAG_SUSPEND)) | |
670 | /* Suspend bit of the previous buffer is not set. */ | |
671 | channel->ccws[index].flags |= CCW_FLAG_PCI; | |
672 | /* Suspend bit of the next buffer is set. */ | |
673 | channel->ccws[index].flags &= ~CCW_FLAG_SUSPEND; | |
674 | } | |
675 | } | |
676 | ||
677 | static int | |
678 | lcs_ready_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
679 | { | |
680 | unsigned long flags; | |
681 | int index, rc; | |
682 | ||
683 | LCS_DBF_TEXT(5, trace, "rdybuff"); | |
9163bb2e UB |
684 | BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED && |
685 | buffer->state != LCS_BUF_STATE_PROCESSED); | |
1da177e4 | 686 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
9163bb2e | 687 | buffer->state = LCS_BUF_STATE_READY; |
1da177e4 LT |
688 | index = buffer - channel->iob; |
689 | /* Set length. */ | |
690 | channel->ccws[index].count = buffer->count; | |
691 | /* Check relevant PCI/suspend bits. */ | |
692 | __lcs_ready_buffer_bits(channel, index); | |
693 | rc = __lcs_resume_channel(channel); | |
694 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
695 | return rc; | |
696 | } | |
697 | ||
698 | /** | |
699 | * Mark the buffer as processed. Take care of the suspend bit | |
700 | * of the previous buffer. This function is called from | |
701 | * interrupt context, so the lock must not be taken. | |
702 | */ | |
703 | static int | |
704 | __lcs_processed_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
705 | { | |
706 | int index, prev, next; | |
707 | ||
708 | LCS_DBF_TEXT(5, trace, "prcsbuff"); | |
9163bb2e UB |
709 | BUG_ON(buffer->state != LCS_BUF_STATE_READY); |
710 | buffer->state = LCS_BUF_STATE_PROCESSED; | |
1da177e4 LT |
711 | index = buffer - channel->iob; |
712 | prev = (index - 1) & (LCS_NUM_BUFFS - 1); | |
713 | next = (index + 1) & (LCS_NUM_BUFFS - 1); | |
714 | /* Set the suspend bit and clear the PCI bit of this buffer. */ | |
715 | channel->ccws[index].flags |= CCW_FLAG_SUSPEND; | |
716 | channel->ccws[index].flags &= ~CCW_FLAG_PCI; | |
717 | /* Check the suspend bit of the previous buffer. */ | |
9163bb2e | 718 | if (channel->iob[prev].state == LCS_BUF_STATE_READY) { |
1da177e4 LT |
719 | /* |
720 | * Previous buffer is in state ready. It might have | |
721 | * happened in lcs_ready_buffer that the suspend bit | |
722 | * has not been cleared to avoid an endless loop. | |
723 | * Do it now. | |
724 | */ | |
725 | __lcs_ready_buffer_bits(channel, prev); | |
726 | } | |
727 | /* Clear PCI bit of next buffer. */ | |
728 | channel->ccws[next].flags &= ~CCW_FLAG_PCI; | |
729 | return __lcs_resume_channel(channel); | |
730 | } | |
731 | ||
732 | /** | |
733 | * Put a processed buffer back to state empty. | |
734 | */ | |
735 | static void | |
736 | lcs_release_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
737 | { | |
738 | unsigned long flags; | |
739 | ||
740 | LCS_DBF_TEXT(5, trace, "relbuff"); | |
9163bb2e UB |
741 | BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED && |
742 | buffer->state != LCS_BUF_STATE_PROCESSED); | |
1da177e4 | 743 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
9163bb2e | 744 | buffer->state = LCS_BUF_STATE_EMPTY; |
1da177e4 LT |
745 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); |
746 | } | |
747 | ||
748 | /** | |
749 | * Get buffer for a lan command. | |
750 | */ | |
751 | static struct lcs_buffer * | |
752 | lcs_get_lancmd(struct lcs_card *card, int count) | |
753 | { | |
754 | struct lcs_buffer *buffer; | |
755 | struct lcs_cmd *cmd; | |
756 | ||
757 | LCS_DBF_TEXT(4, trace, "getlncmd"); | |
758 | /* Get buffer and wait if none is available. */ | |
759 | wait_event(card->write.wait_q, | |
760 | ((buffer = lcs_get_buffer(&card->write)) != NULL)); | |
761 | count += sizeof(struct lcs_header); | |
762 | *(__u16 *)(buffer->data + count) = 0; | |
763 | buffer->count = count + sizeof(__u16); | |
764 | buffer->callback = lcs_release_buffer; | |
765 | cmd = (struct lcs_cmd *) buffer->data; | |
766 | cmd->offset = count; | |
767 | cmd->type = LCS_FRAME_TYPE_CONTROL; | |
768 | cmd->slot = 0; | |
769 | return buffer; | |
770 | } | |
771 | ||
772 | ||
773 | static void | |
774 | lcs_get_reply(struct lcs_reply *reply) | |
775 | { | |
776 | WARN_ON(atomic_read(&reply->refcnt) <= 0); | |
777 | atomic_inc(&reply->refcnt); | |
778 | } | |
779 | ||
780 | static void | |
781 | lcs_put_reply(struct lcs_reply *reply) | |
782 | { | |
783 | WARN_ON(atomic_read(&reply->refcnt) <= 0); | |
784 | if (atomic_dec_and_test(&reply->refcnt)) { | |
785 | kfree(reply); | |
786 | } | |
787 | ||
788 | } | |
789 | ||
790 | static struct lcs_reply * | |
791 | lcs_alloc_reply(struct lcs_cmd *cmd) | |
792 | { | |
793 | struct lcs_reply *reply; | |
794 | ||
795 | LCS_DBF_TEXT(4, trace, "getreply"); | |
796 | ||
88abaab4 | 797 | reply = kzalloc(sizeof(struct lcs_reply), GFP_ATOMIC); |
1da177e4 LT |
798 | if (!reply) |
799 | return NULL; | |
1da177e4 LT |
800 | atomic_set(&reply->refcnt,1); |
801 | reply->sequence_no = cmd->sequence_no; | |
802 | reply->received = 0; | |
803 | reply->rc = 0; | |
804 | init_waitqueue_head(&reply->wait_q); | |
805 | ||
806 | return reply; | |
807 | } | |
808 | ||
809 | /** | |
810 | * Notifier function for lancmd replies. Called from read irq. | |
811 | */ | |
812 | static void | |
813 | lcs_notify_lancmd_waiters(struct lcs_card *card, struct lcs_cmd *cmd) | |
814 | { | |
815 | struct list_head *l, *n; | |
816 | struct lcs_reply *reply; | |
817 | ||
818 | LCS_DBF_TEXT(4, trace, "notiwait"); | |
819 | spin_lock(&card->lock); | |
820 | list_for_each_safe(l, n, &card->lancmd_waiters) { | |
821 | reply = list_entry(l, struct lcs_reply, list); | |
822 | if (reply->sequence_no == cmd->sequence_no) { | |
823 | lcs_get_reply(reply); | |
824 | list_del_init(&reply->list); | |
825 | if (reply->callback != NULL) | |
826 | reply->callback(card, cmd); | |
827 | reply->received = 1; | |
828 | reply->rc = cmd->return_code; | |
829 | wake_up(&reply->wait_q); | |
830 | lcs_put_reply(reply); | |
831 | break; | |
832 | } | |
833 | } | |
834 | spin_unlock(&card->lock); | |
835 | } | |
836 | ||
837 | /** | |
838 | * Emit buffer of a lan comand. | |
839 | */ | |
2b67fc46 | 840 | static void |
1da177e4 LT |
841 | lcs_lancmd_timeout(unsigned long data) |
842 | { | |
843 | struct lcs_reply *reply, *list_reply, *r; | |
844 | unsigned long flags; | |
845 | ||
846 | LCS_DBF_TEXT(4, trace, "timeout"); | |
847 | reply = (struct lcs_reply *) data; | |
848 | spin_lock_irqsave(&reply->card->lock, flags); | |
849 | list_for_each_entry_safe(list_reply, r, | |
850 | &reply->card->lancmd_waiters,list) { | |
851 | if (reply == list_reply) { | |
852 | lcs_get_reply(reply); | |
853 | list_del_init(&reply->list); | |
854 | spin_unlock_irqrestore(&reply->card->lock, flags); | |
855 | reply->received = 1; | |
856 | reply->rc = -ETIME; | |
857 | wake_up(&reply->wait_q); | |
858 | lcs_put_reply(reply); | |
859 | return; | |
860 | } | |
861 | } | |
862 | spin_unlock_irqrestore(&reply->card->lock, flags); | |
863 | } | |
864 | ||
865 | static int | |
866 | lcs_send_lancmd(struct lcs_card *card, struct lcs_buffer *buffer, | |
867 | void (*reply_callback)(struct lcs_card *, struct lcs_cmd *)) | |
868 | { | |
869 | struct lcs_reply *reply; | |
870 | struct lcs_cmd *cmd; | |
871 | struct timer_list timer; | |
872 | unsigned long flags; | |
873 | int rc; | |
874 | ||
875 | LCS_DBF_TEXT(4, trace, "sendcmd"); | |
876 | cmd = (struct lcs_cmd *) buffer->data; | |
877 | cmd->return_code = 0; | |
878 | cmd->sequence_no = card->sequence_no++; | |
879 | reply = lcs_alloc_reply(cmd); | |
880 | if (!reply) | |
881 | return -ENOMEM; | |
882 | reply->callback = reply_callback; | |
883 | reply->card = card; | |
884 | spin_lock_irqsave(&card->lock, flags); | |
885 | list_add_tail(&reply->list, &card->lancmd_waiters); | |
886 | spin_unlock_irqrestore(&card->lock, flags); | |
887 | ||
888 | buffer->callback = lcs_release_buffer; | |
889 | rc = lcs_ready_buffer(&card->write, buffer); | |
890 | if (rc) | |
891 | return rc; | |
d62e09e3 | 892 | init_timer_on_stack(&timer); |
1da177e4 LT |
893 | timer.function = lcs_lancmd_timeout; |
894 | timer.data = (unsigned long) reply; | |
895 | timer.expires = jiffies + HZ*card->lancmd_timeout; | |
896 | add_timer(&timer); | |
897 | wait_event(reply->wait_q, reply->received); | |
898 | del_timer_sync(&timer); | |
899 | LCS_DBF_TEXT_(4, trace, "rc:%d",reply->rc); | |
900 | rc = reply->rc; | |
901 | lcs_put_reply(reply); | |
902 | return rc ? -EIO : 0; | |
903 | } | |
904 | ||
905 | /** | |
906 | * LCS startup command | |
907 | */ | |
908 | static int | |
909 | lcs_send_startup(struct lcs_card *card, __u8 initiator) | |
910 | { | |
911 | struct lcs_buffer *buffer; | |
912 | struct lcs_cmd *cmd; | |
913 | ||
914 | LCS_DBF_TEXT(2, trace, "startup"); | |
915 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
916 | cmd = (struct lcs_cmd *) buffer->data; | |
917 | cmd->cmd_code = LCS_CMD_STARTUP; | |
918 | cmd->initiator = initiator; | |
919 | cmd->cmd.lcs_startup.buff_size = LCS_IOBUFFERSIZE; | |
920 | return lcs_send_lancmd(card, buffer, NULL); | |
921 | } | |
922 | ||
923 | /** | |
924 | * LCS shutdown command | |
925 | */ | |
926 | static int | |
927 | lcs_send_shutdown(struct lcs_card *card) | |
928 | { | |
929 | struct lcs_buffer *buffer; | |
930 | struct lcs_cmd *cmd; | |
931 | ||
932 | LCS_DBF_TEXT(2, trace, "shutdown"); | |
933 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
934 | cmd = (struct lcs_cmd *) buffer->data; | |
935 | cmd->cmd_code = LCS_CMD_SHUTDOWN; | |
936 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
937 | return lcs_send_lancmd(card, buffer, NULL); | |
938 | } | |
939 | ||
940 | /** | |
941 | * LCS lanstat command | |
942 | */ | |
943 | static void | |
944 | __lcs_lanstat_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
945 | { | |
946 | LCS_DBF_TEXT(2, trace, "statcb"); | |
947 | memcpy(card->mac, cmd->cmd.lcs_lanstat_cmd.mac_addr, LCS_MAC_LENGTH); | |
948 | } | |
949 | ||
950 | static int | |
951 | lcs_send_lanstat(struct lcs_card *card) | |
952 | { | |
953 | struct lcs_buffer *buffer; | |
954 | struct lcs_cmd *cmd; | |
955 | ||
956 | LCS_DBF_TEXT(2,trace, "cmdstat"); | |
957 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
958 | cmd = (struct lcs_cmd *) buffer->data; | |
959 | /* Setup lanstat command. */ | |
960 | cmd->cmd_code = LCS_CMD_LANSTAT; | |
961 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
962 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
963 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
964 | return lcs_send_lancmd(card, buffer, __lcs_lanstat_cb); | |
965 | } | |
966 | ||
967 | /** | |
968 | * send stoplan command | |
969 | */ | |
970 | static int | |
971 | lcs_send_stoplan(struct lcs_card *card, __u8 initiator) | |
972 | { | |
973 | struct lcs_buffer *buffer; | |
974 | struct lcs_cmd *cmd; | |
975 | ||
976 | LCS_DBF_TEXT(2, trace, "cmdstpln"); | |
977 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
978 | cmd = (struct lcs_cmd *) buffer->data; | |
979 | cmd->cmd_code = LCS_CMD_STOPLAN; | |
980 | cmd->initiator = initiator; | |
981 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
982 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
983 | return lcs_send_lancmd(card, buffer, NULL); | |
984 | } | |
985 | ||
986 | /** | |
987 | * send startlan command | |
988 | */ | |
989 | static void | |
990 | __lcs_send_startlan_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
991 | { | |
992 | LCS_DBF_TEXT(2, trace, "srtlancb"); | |
993 | card->lan_type = cmd->cmd.lcs_std_cmd.lan_type; | |
994 | card->portno = cmd->cmd.lcs_std_cmd.portno; | |
995 | } | |
996 | ||
997 | static int | |
998 | lcs_send_startlan(struct lcs_card *card, __u8 initiator) | |
999 | { | |
1000 | struct lcs_buffer *buffer; | |
1001 | struct lcs_cmd *cmd; | |
1002 | ||
1003 | LCS_DBF_TEXT(2, trace, "cmdstaln"); | |
1004 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
1005 | cmd = (struct lcs_cmd *) buffer->data; | |
1006 | cmd->cmd_code = LCS_CMD_STARTLAN; | |
1007 | cmd->initiator = initiator; | |
1008 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
1009 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
1010 | return lcs_send_lancmd(card, buffer, __lcs_send_startlan_cb); | |
1011 | } | |
1012 | ||
1013 | #ifdef CONFIG_IP_MULTICAST | |
1014 | /** | |
1015 | * send setipm command (Multicast) | |
1016 | */ | |
1017 | static int | |
1018 | lcs_send_setipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list) | |
1019 | { | |
1020 | struct lcs_buffer *buffer; | |
1021 | struct lcs_cmd *cmd; | |
1022 | ||
1023 | LCS_DBF_TEXT(2, trace, "cmdsetim"); | |
1024 | buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE); | |
1025 | cmd = (struct lcs_cmd *) buffer->data; | |
1026 | cmd->cmd_code = LCS_CMD_SETIPM; | |
1027 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1028 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1029 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1030 | cmd->cmd.lcs_qipassist.version = 4; | |
1031 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1032 | memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair, | |
1033 | &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair)); | |
1034 | LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr); | |
1035 | return lcs_send_lancmd(card, buffer, NULL); | |
1036 | } | |
1037 | ||
1038 | /** | |
1039 | * send delipm command (Multicast) | |
1040 | */ | |
1041 | static int | |
1042 | lcs_send_delipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list) | |
1043 | { | |
1044 | struct lcs_buffer *buffer; | |
1045 | struct lcs_cmd *cmd; | |
1046 | ||
1047 | LCS_DBF_TEXT(2, trace, "cmddelim"); | |
1048 | buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE); | |
1049 | cmd = (struct lcs_cmd *) buffer->data; | |
1050 | cmd->cmd_code = LCS_CMD_DELIPM; | |
1051 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1052 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1053 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1054 | cmd->cmd.lcs_qipassist.version = 4; | |
1055 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1056 | memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair, | |
1057 | &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair)); | |
1058 | LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr); | |
1059 | return lcs_send_lancmd(card, buffer, NULL); | |
1060 | } | |
1061 | ||
1062 | /** | |
1063 | * check if multicast is supported by LCS | |
1064 | */ | |
1065 | static void | |
1066 | __lcs_check_multicast_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
1067 | { | |
1068 | LCS_DBF_TEXT(2, trace, "chkmccb"); | |
1069 | card->ip_assists_supported = | |
1070 | cmd->cmd.lcs_qipassist.ip_assists_supported; | |
1071 | card->ip_assists_enabled = | |
1072 | cmd->cmd.lcs_qipassist.ip_assists_enabled; | |
1073 | } | |
1074 | ||
1075 | static int | |
1076 | lcs_check_multicast_support(struct lcs_card *card) | |
1077 | { | |
1078 | struct lcs_buffer *buffer; | |
1079 | struct lcs_cmd *cmd; | |
1080 | int rc; | |
1081 | ||
1082 | LCS_DBF_TEXT(2, trace, "cmdqipa"); | |
1083 | /* Send query ipassist. */ | |
1084 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
1085 | cmd = (struct lcs_cmd *) buffer->data; | |
1086 | cmd->cmd_code = LCS_CMD_QIPASSIST; | |
1087 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1088 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1089 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1090 | cmd->cmd.lcs_qipassist.version = 4; | |
1091 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1092 | rc = lcs_send_lancmd(card, buffer, __lcs_check_multicast_cb); | |
1093 | if (rc != 0) { | |
c99fc5da | 1094 | pr_err("Query IPAssist failed. Assuming unsupported!\n"); |
1da177e4 LT |
1095 | return -EOPNOTSUPP; |
1096 | } | |
1da177e4 LT |
1097 | if (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) |
1098 | return 0; | |
1099 | return -EOPNOTSUPP; | |
1100 | } | |
1101 | ||
1102 | /** | |
1103 | * set or del multicast address on LCS card | |
1104 | */ | |
1105 | static void | |
1106 | lcs_fix_multicast_list(struct lcs_card *card) | |
1107 | { | |
1108 | struct list_head failed_list; | |
1109 | struct lcs_ipm_list *ipm, *tmp; | |
1110 | unsigned long flags; | |
1111 | int rc; | |
1112 | ||
1113 | LCS_DBF_TEXT(4,trace, "fixipm"); | |
1114 | INIT_LIST_HEAD(&failed_list); | |
1115 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1116 | list_modified: | |
1117 | list_for_each_entry_safe(ipm, tmp, &card->ipm_list, list){ | |
1118 | switch (ipm->ipm_state) { | |
1119 | case LCS_IPM_STATE_SET_REQUIRED: | |
1120 | /* del from ipm_list so noone else can tamper with | |
1121 | * this entry */ | |
1122 | list_del_init(&ipm->list); | |
1123 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1124 | rc = lcs_send_setipm(card, ipm); | |
1125 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1126 | if (rc) { | |
c99fc5da KW |
1127 | pr_info("Adding multicast address failed." |
1128 | " Table possibly full!\n"); | |
1da177e4 LT |
1129 | /* store ipm in failed list -> will be added |
1130 | * to ipm_list again, so a retry will be done | |
1131 | * during the next call of this function */ | |
1132 | list_add_tail(&ipm->list, &failed_list); | |
1133 | } else { | |
1134 | ipm->ipm_state = LCS_IPM_STATE_ON_CARD; | |
1135 | /* re-insert into ipm_list */ | |
1136 | list_add_tail(&ipm->list, &card->ipm_list); | |
1137 | } | |
1138 | goto list_modified; | |
1139 | case LCS_IPM_STATE_DEL_REQUIRED: | |
1140 | list_del(&ipm->list); | |
1141 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1142 | lcs_send_delipm(card, ipm); | |
1143 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1144 | kfree(ipm); | |
1145 | goto list_modified; | |
1146 | case LCS_IPM_STATE_ON_CARD: | |
1147 | break; | |
1148 | } | |
1149 | } | |
1150 | /* re-insert all entries from the failed_list into ipm_list */ | |
179e0917 AM |
1151 | list_for_each_entry_safe(ipm, tmp, &failed_list, list) |
1152 | list_move_tail(&ipm->list, &card->ipm_list); | |
1153 | ||
1da177e4 | 1154 | spin_unlock_irqrestore(&card->ipm_lock, flags); |
1da177e4 LT |
1155 | } |
1156 | ||
1157 | /** | |
1158 | * get mac address for the relevant Multicast address | |
1159 | */ | |
1160 | static void | |
5a5a852e | 1161 | lcs_get_mac_for_ipm(__be32 ipm, char *mac, struct net_device *dev) |
1da177e4 LT |
1162 | { |
1163 | LCS_DBF_TEXT(4,trace, "getmac"); | |
1164 | if (dev->type == ARPHRD_IEEE802_TR) | |
1165 | ip_tr_mc_map(ipm, mac); | |
1166 | else | |
1167 | ip_eth_mc_map(ipm, mac); | |
1168 | } | |
1169 | ||
1170 | /** | |
1171 | * function called by net device to handle multicast address relevant things | |
1172 | */ | |
1173 | static inline void | |
1174 | lcs_remove_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) | |
1175 | { | |
1176 | struct ip_mc_list *im4; | |
1177 | struct list_head *l; | |
1178 | struct lcs_ipm_list *ipm; | |
1179 | unsigned long flags; | |
1180 | char buf[MAX_ADDR_LEN]; | |
1181 | ||
1182 | LCS_DBF_TEXT(4, trace, "remmclst"); | |
1183 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1184 | list_for_each(l, &card->ipm_list) { | |
1185 | ipm = list_entry(l, struct lcs_ipm_list, list); | |
1186 | for (im4 = in4_dev->mc_list; im4 != NULL; im4 = im4->next) { | |
1187 | lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); | |
1188 | if ( (ipm->ipm.ip_addr == im4->multiaddr) && | |
1189 | (memcmp(buf, &ipm->ipm.mac_addr, | |
1190 | LCS_MAC_LENGTH) == 0) ) | |
1191 | break; | |
1192 | } | |
1193 | if (im4 == NULL) | |
1194 | ipm->ipm_state = LCS_IPM_STATE_DEL_REQUIRED; | |
1195 | } | |
1196 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1197 | } | |
1198 | ||
1199 | static inline struct lcs_ipm_list * | |
1200 | lcs_check_addr_entry(struct lcs_card *card, struct ip_mc_list *im4, char *buf) | |
1201 | { | |
1202 | struct lcs_ipm_list *tmp, *ipm = NULL; | |
1203 | struct list_head *l; | |
1204 | unsigned long flags; | |
1205 | ||
1206 | LCS_DBF_TEXT(4, trace, "chkmcent"); | |
1207 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1208 | list_for_each(l, &card->ipm_list) { | |
1209 | tmp = list_entry(l, struct lcs_ipm_list, list); | |
1210 | if ( (tmp->ipm.ip_addr == im4->multiaddr) && | |
1211 | (memcmp(buf, &tmp->ipm.mac_addr, | |
1212 | LCS_MAC_LENGTH) == 0) ) { | |
1213 | ipm = tmp; | |
1214 | break; | |
1215 | } | |
1216 | } | |
1217 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1218 | return ipm; | |
1219 | } | |
1220 | ||
1221 | static inline void | |
1222 | lcs_set_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) | |
1223 | { | |
1224 | ||
1225 | struct ip_mc_list *im4; | |
1226 | struct lcs_ipm_list *ipm; | |
1227 | char buf[MAX_ADDR_LEN]; | |
1228 | unsigned long flags; | |
1229 | ||
1230 | LCS_DBF_TEXT(4, trace, "setmclst"); | |
1231 | for (im4 = in4_dev->mc_list; im4; im4 = im4->next) { | |
1232 | lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); | |
1233 | ipm = lcs_check_addr_entry(card, im4, buf); | |
1234 | if (ipm != NULL) | |
1235 | continue; /* Address already in list. */ | |
1236 | ipm = (struct lcs_ipm_list *) | |
27eb5ac8 | 1237 | kzalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC); |
1da177e4 | 1238 | if (ipm == NULL) { |
c99fc5da KW |
1239 | pr_info("Not enough memory to add" |
1240 | " new multicast entry!\n"); | |
1da177e4 LT |
1241 | break; |
1242 | } | |
1da177e4 LT |
1243 | memcpy(&ipm->ipm.mac_addr, buf, LCS_MAC_LENGTH); |
1244 | ipm->ipm.ip_addr = im4->multiaddr; | |
1245 | ipm->ipm_state = LCS_IPM_STATE_SET_REQUIRED; | |
1246 | spin_lock_irqsave(&card->ipm_lock, flags); | |
27eb5ac8 | 1247 | LCS_DBF_HEX(2,trace,&ipm->ipm.ip_addr,4); |
1da177e4 LT |
1248 | list_add(&ipm->list, &card->ipm_list); |
1249 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1250 | } | |
1251 | } | |
1252 | ||
1253 | static int | |
1254 | lcs_register_mc_addresses(void *data) | |
1255 | { | |
1256 | struct lcs_card *card; | |
1257 | struct in_device *in4_dev; | |
1258 | ||
1259 | card = (struct lcs_card *) data; | |
1da177e4 LT |
1260 | |
1261 | if (!lcs_do_run_thread(card, LCS_SET_MC_THREAD)) | |
1262 | return 0; | |
1263 | LCS_DBF_TEXT(4, trace, "regmulti"); | |
1264 | ||
1265 | in4_dev = in_dev_get(card->dev); | |
1266 | if (in4_dev == NULL) | |
1267 | goto out; | |
1268 | read_lock(&in4_dev->mc_list_lock); | |
1269 | lcs_remove_mc_addresses(card,in4_dev); | |
1270 | lcs_set_mc_addresses(card, in4_dev); | |
1271 | read_unlock(&in4_dev->mc_list_lock); | |
1272 | in_dev_put(in4_dev); | |
1273 | ||
27eb5ac8 KW |
1274 | netif_carrier_off(card->dev); |
1275 | netif_tx_disable(card->dev); | |
1276 | wait_event(card->write.wait_q, | |
9163bb2e | 1277 | (card->write.state != LCS_CH_STATE_RUNNING)); |
1da177e4 | 1278 | lcs_fix_multicast_list(card); |
27eb5ac8 KW |
1279 | if (card->state == DEV_STATE_UP) { |
1280 | netif_carrier_on(card->dev); | |
1281 | netif_wake_queue(card->dev); | |
1282 | } | |
1da177e4 LT |
1283 | out: |
1284 | lcs_clear_thread_running_bit(card, LCS_SET_MC_THREAD); | |
1285 | return 0; | |
1286 | } | |
801599b0 HC |
1287 | #endif /* CONFIG_IP_MULTICAST */ |
1288 | ||
1da177e4 LT |
1289 | /** |
1290 | * function called by net device to | |
1291 | * handle multicast address relevant things | |
1292 | */ | |
1293 | static void | |
1294 | lcs_set_multicast_list(struct net_device *dev) | |
1295 | { | |
801599b0 | 1296 | #ifdef CONFIG_IP_MULTICAST |
1da177e4 LT |
1297 | struct lcs_card *card; |
1298 | ||
1299 | LCS_DBF_TEXT(4, trace, "setmulti"); | |
ad660e2f | 1300 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 | 1301 | |
e82b0f2c | 1302 | if (!lcs_set_thread_start_bit(card, LCS_SET_MC_THREAD)) |
1da177e4 | 1303 | schedule_work(&card->kernel_thread_starter); |
1da177e4 | 1304 | #endif /* CONFIG_IP_MULTICAST */ |
801599b0 | 1305 | } |
1da177e4 LT |
1306 | |
1307 | static long | |
1308 | lcs_check_irb_error(struct ccw_device *cdev, struct irb *irb) | |
1309 | { | |
1310 | if (!IS_ERR(irb)) | |
1311 | return 0; | |
1312 | ||
1313 | switch (PTR_ERR(irb)) { | |
1314 | case -EIO: | |
c99fc5da KW |
1315 | dev_warn(&cdev->dev, |
1316 | "An I/O-error occurred on the LCS device\n"); | |
1da177e4 LT |
1317 | LCS_DBF_TEXT(2, trace, "ckirberr"); |
1318 | LCS_DBF_TEXT_(2, trace, " rc%d", -EIO); | |
1319 | break; | |
1320 | case -ETIMEDOUT: | |
c99fc5da KW |
1321 | dev_warn(&cdev->dev, |
1322 | "A command timed out on the LCS device\n"); | |
1da177e4 LT |
1323 | LCS_DBF_TEXT(2, trace, "ckirberr"); |
1324 | LCS_DBF_TEXT_(2, trace, " rc%d", -ETIMEDOUT); | |
1325 | break; | |
1326 | default: | |
c99fc5da KW |
1327 | dev_warn(&cdev->dev, |
1328 | "An error occurred on the LCS device, rc=%ld\n", | |
1329 | PTR_ERR(irb)); | |
1da177e4 LT |
1330 | LCS_DBF_TEXT(2, trace, "ckirberr"); |
1331 | LCS_DBF_TEXT(2, trace, " rc???"); | |
1332 | } | |
1333 | return PTR_ERR(irb); | |
1334 | } | |
1335 | ||
27eb5ac8 KW |
1336 | static int |
1337 | lcs_get_problem(struct ccw_device *cdev, struct irb *irb) | |
1338 | { | |
1339 | int dstat, cstat; | |
1340 | char *sense; | |
1341 | ||
1342 | sense = (char *) irb->ecw; | |
23d805b6 PO |
1343 | cstat = irb->scsw.cmd.cstat; |
1344 | dstat = irb->scsw.cmd.dstat; | |
27eb5ac8 KW |
1345 | |
1346 | if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK | | |
1347 | SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK | | |
1348 | SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) { | |
1349 | LCS_DBF_TEXT(2, trace, "CGENCHK"); | |
1350 | return 1; | |
1351 | } | |
1352 | if (dstat & DEV_STAT_UNIT_CHECK) { | |
1353 | if (sense[LCS_SENSE_BYTE_1] & | |
1354 | LCS_SENSE_RESETTING_EVENT) { | |
1355 | LCS_DBF_TEXT(2, trace, "REVIND"); | |
1356 | return 1; | |
1357 | } | |
1358 | if (sense[LCS_SENSE_BYTE_0] & | |
1359 | LCS_SENSE_CMD_REJECT) { | |
1360 | LCS_DBF_TEXT(2, trace, "CMDREJ"); | |
1361 | return 0; | |
1362 | } | |
1363 | if ((!sense[LCS_SENSE_BYTE_0]) && | |
1364 | (!sense[LCS_SENSE_BYTE_1]) && | |
1365 | (!sense[LCS_SENSE_BYTE_2]) && | |
1366 | (!sense[LCS_SENSE_BYTE_3])) { | |
1367 | LCS_DBF_TEXT(2, trace, "ZEROSEN"); | |
1368 | return 0; | |
1369 | } | |
1370 | LCS_DBF_TEXT(2, trace, "DGENCHK"); | |
1371 | return 1; | |
1372 | } | |
1373 | return 0; | |
1374 | } | |
1375 | ||
2b67fc46 | 1376 | static void |
27eb5ac8 KW |
1377 | lcs_schedule_recovery(struct lcs_card *card) |
1378 | { | |
1379 | LCS_DBF_TEXT(2, trace, "startrec"); | |
1380 | if (!lcs_set_thread_start_bit(card, LCS_RECOVERY_THREAD)) | |
1381 | schedule_work(&card->kernel_thread_starter); | |
1382 | } | |
1da177e4 LT |
1383 | |
1384 | /** | |
1385 | * IRQ Handler for LCS channels | |
1386 | */ | |
1387 | static void | |
1388 | lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb) | |
1389 | { | |
1390 | struct lcs_card *card; | |
1391 | struct lcs_channel *channel; | |
27eb5ac8 KW |
1392 | int rc, index; |
1393 | int cstat, dstat; | |
1da177e4 LT |
1394 | |
1395 | if (lcs_check_irb_error(cdev, irb)) | |
1396 | return; | |
1397 | ||
1398 | card = CARD_FROM_DEV(cdev); | |
1399 | if (card->read.ccwdev == cdev) | |
1400 | channel = &card->read; | |
1401 | else | |
1402 | channel = &card->write; | |
1403 | ||
23d805b6 PO |
1404 | cstat = irb->scsw.cmd.cstat; |
1405 | dstat = irb->scsw.cmd.dstat; | |
2a0217d5 | 1406 | LCS_DBF_TEXT_(5, trace, "Rint%s", dev_name(&cdev->dev)); |
23d805b6 PO |
1407 | LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.cstat, |
1408 | irb->scsw.cmd.dstat); | |
1409 | LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.fctl, | |
1410 | irb->scsw.cmd.actl); | |
1da177e4 | 1411 | |
27eb5ac8 KW |
1412 | /* Check for channel and device errors presented */ |
1413 | rc = lcs_get_problem(cdev, irb); | |
1414 | if (rc || (dstat & DEV_STAT_UNIT_EXCEP)) { | |
c99fc5da KW |
1415 | dev_warn(&cdev->dev, |
1416 | "The LCS device stopped because of an error," | |
1417 | " dstat=0x%X, cstat=0x%X \n", | |
1418 | dstat, cstat); | |
27eb5ac8 | 1419 | if (rc) { |
59579da3 | 1420 | channel->state = LCS_CH_STATE_ERROR; |
27eb5ac8 KW |
1421 | } |
1422 | } | |
59579da3 KW |
1423 | if (channel->state == LCS_CH_STATE_ERROR) { |
1424 | lcs_schedule_recovery(card); | |
1425 | wake_up(&card->wait_q); | |
1426 | return; | |
1427 | } | |
1da177e4 | 1428 | /* How far in the ccw chain have we processed? */ |
9163bb2e | 1429 | if ((channel->state != LCS_CH_STATE_INIT) && |
9b3b9ab6 KW |
1430 | (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) && |
1431 | (irb->scsw.cmd.cpa != 0)) { | |
23d805b6 | 1432 | index = (struct ccw1 *) __va((addr_t) irb->scsw.cmd.cpa) |
1da177e4 | 1433 | - channel->ccws; |
23d805b6 PO |
1434 | if ((irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) || |
1435 | (irb->scsw.cmd.cstat & SCHN_STAT_PCI)) | |
1da177e4 LT |
1436 | /* Bloody io subsystem tells us lies about cpa... */ |
1437 | index = (index - 1) & (LCS_NUM_BUFFS - 1); | |
1438 | while (channel->io_idx != index) { | |
1439 | __lcs_processed_buffer(channel, | |
1440 | channel->iob + channel->io_idx); | |
1441 | channel->io_idx = | |
1442 | (channel->io_idx + 1) & (LCS_NUM_BUFFS - 1); | |
1443 | } | |
1444 | } | |
1445 | ||
23d805b6 PO |
1446 | if ((irb->scsw.cmd.dstat & DEV_STAT_DEV_END) || |
1447 | (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) || | |
1448 | (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)) | |
1da177e4 | 1449 | /* Mark channel as stopped. */ |
9163bb2e | 1450 | channel->state = LCS_CH_STATE_STOPPED; |
23d805b6 | 1451 | else if (irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) |
1da177e4 | 1452 | /* CCW execution stopped on a suspend bit. */ |
9163bb2e | 1453 | channel->state = LCS_CH_STATE_SUSPENDED; |
23d805b6 PO |
1454 | if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) { |
1455 | if (irb->scsw.cmd.cc != 0) { | |
1da177e4 LT |
1456 | ccw_device_halt(channel->ccwdev, (addr_t) channel); |
1457 | return; | |
1458 | } | |
1459 | /* The channel has been stopped by halt_IO. */ | |
9163bb2e | 1460 | channel->state = LCS_CH_STATE_HALTED; |
1da177e4 | 1461 | } |
23d805b6 | 1462 | if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) |
9163bb2e | 1463 | channel->state = LCS_CH_STATE_CLEARED; |
1da177e4 LT |
1464 | /* Do the rest in the tasklet. */ |
1465 | tasklet_schedule(&channel->irq_tasklet); | |
1466 | } | |
1467 | ||
1468 | /** | |
1469 | * Tasklet for IRQ handler | |
1470 | */ | |
1471 | static void | |
1472 | lcs_tasklet(unsigned long data) | |
1473 | { | |
1474 | unsigned long flags; | |
1475 | struct lcs_channel *channel; | |
1476 | struct lcs_buffer *iob; | |
1477 | int buf_idx; | |
1478 | int rc; | |
1479 | ||
1480 | channel = (struct lcs_channel *) data; | |
2a0217d5 | 1481 | LCS_DBF_TEXT_(5, trace, "tlet%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
1482 | |
1483 | /* Check for processed buffers. */ | |
1484 | iob = channel->iob; | |
1485 | buf_idx = channel->buf_idx; | |
9163bb2e | 1486 | while (iob[buf_idx].state == LCS_BUF_STATE_PROCESSED) { |
1da177e4 LT |
1487 | /* Do the callback thing. */ |
1488 | if (iob[buf_idx].callback != NULL) | |
1489 | iob[buf_idx].callback(channel, iob + buf_idx); | |
1490 | buf_idx = (buf_idx + 1) & (LCS_NUM_BUFFS - 1); | |
1491 | } | |
1492 | channel->buf_idx = buf_idx; | |
1493 | ||
9163bb2e | 1494 | if (channel->state == LCS_CH_STATE_STOPPED) |
1da177e4 LT |
1495 | // FIXME: what if rc != 0 ?? |
1496 | rc = lcs_start_channel(channel); | |
1497 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); | |
9163bb2e UB |
1498 | if (channel->state == LCS_CH_STATE_SUSPENDED && |
1499 | channel->iob[channel->io_idx].state == LCS_BUF_STATE_READY) { | |
1da177e4 LT |
1500 | // FIXME: what if rc != 0 ?? |
1501 | rc = __lcs_resume_channel(channel); | |
1502 | } | |
1503 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
1504 | ||
1505 | /* Something happened on the channel. Wake up waiters. */ | |
1506 | wake_up(&channel->wait_q); | |
1507 | } | |
1508 | ||
1509 | /** | |
1510 | * Finish current tx buffer and make it ready for transmit. | |
1511 | */ | |
1512 | static void | |
1513 | __lcs_emit_txbuffer(struct lcs_card *card) | |
1514 | { | |
1515 | LCS_DBF_TEXT(5, trace, "emittx"); | |
1516 | *(__u16 *)(card->tx_buffer->data + card->tx_buffer->count) = 0; | |
1517 | card->tx_buffer->count += 2; | |
1518 | lcs_ready_buffer(&card->write, card->tx_buffer); | |
1519 | card->tx_buffer = NULL; | |
1520 | card->tx_emitted++; | |
1521 | } | |
1522 | ||
1523 | /** | |
1524 | * Callback for finished tx buffers. | |
1525 | */ | |
1526 | static void | |
1527 | lcs_txbuffer_cb(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
1528 | { | |
1529 | struct lcs_card *card; | |
1530 | ||
1531 | LCS_DBF_TEXT(5, trace, "txbuffcb"); | |
1532 | /* Put buffer back to pool. */ | |
1533 | lcs_release_buffer(channel, buffer); | |
b385a144 | 1534 | card = container_of(channel, struct lcs_card, write); |
27eb5ac8 | 1535 | if (netif_queue_stopped(card->dev) && netif_carrier_ok(card->dev)) |
0d613a27 | 1536 | netif_wake_queue(card->dev); |
1da177e4 LT |
1537 | spin_lock(&card->lock); |
1538 | card->tx_emitted--; | |
1539 | if (card->tx_emitted <= 0 && card->tx_buffer != NULL) | |
1540 | /* | |
1541 | * Last running tx buffer has finished. Submit partially | |
1542 | * filled current buffer. | |
1543 | */ | |
1544 | __lcs_emit_txbuffer(card); | |
1545 | spin_unlock(&card->lock); | |
1546 | } | |
1547 | ||
1548 | /** | |
1549 | * Packet transmit function called by network stack | |
1550 | */ | |
1551 | static int | |
1552 | __lcs_start_xmit(struct lcs_card *card, struct sk_buff *skb, | |
1553 | struct net_device *dev) | |
1554 | { | |
1555 | struct lcs_header *header; | |
ec634fe3 | 1556 | int rc = NETDEV_TX_OK; |
1da177e4 LT |
1557 | |
1558 | LCS_DBF_TEXT(5, trace, "hardxmit"); | |
1559 | if (skb == NULL) { | |
1560 | card->stats.tx_dropped++; | |
1561 | card->stats.tx_errors++; | |
ec634fe3 | 1562 | return NETDEV_TX_OK; |
1da177e4 LT |
1563 | } |
1564 | if (card->state != DEV_STATE_UP) { | |
1565 | dev_kfree_skb(skb); | |
1566 | card->stats.tx_dropped++; | |
1567 | card->stats.tx_errors++; | |
1568 | card->stats.tx_carrier_errors++; | |
ec634fe3 | 1569 | return NETDEV_TX_OK; |
1da177e4 | 1570 | } |
27eb5ac8 KW |
1571 | if (skb->protocol == htons(ETH_P_IPV6)) { |
1572 | dev_kfree_skb(skb); | |
ec634fe3 | 1573 | return NETDEV_TX_OK; |
27eb5ac8 | 1574 | } |
0d613a27 FP |
1575 | netif_stop_queue(card->dev); |
1576 | spin_lock(&card->lock); | |
1da177e4 LT |
1577 | if (card->tx_buffer != NULL && |
1578 | card->tx_buffer->count + sizeof(struct lcs_header) + | |
1579 | skb->len + sizeof(u16) > LCS_IOBUFFERSIZE) | |
1580 | /* skb too big for current tx buffer. */ | |
1581 | __lcs_emit_txbuffer(card); | |
1582 | if (card->tx_buffer == NULL) { | |
1583 | /* Get new tx buffer */ | |
1584 | card->tx_buffer = lcs_get_buffer(&card->write); | |
1585 | if (card->tx_buffer == NULL) { | |
1586 | card->stats.tx_dropped++; | |
9e669d32 | 1587 | rc = NETDEV_TX_BUSY; |
0d613a27 | 1588 | goto out; |
1da177e4 LT |
1589 | } |
1590 | card->tx_buffer->callback = lcs_txbuffer_cb; | |
1591 | card->tx_buffer->count = 0; | |
1592 | } | |
1593 | header = (struct lcs_header *) | |
1594 | (card->tx_buffer->data + card->tx_buffer->count); | |
1595 | card->tx_buffer->count += skb->len + sizeof(struct lcs_header); | |
1596 | header->offset = card->tx_buffer->count; | |
1597 | header->type = card->lan_type; | |
1598 | header->slot = card->portno; | |
d626f62b | 1599 | skb_copy_from_linear_data(skb, header + 1, skb->len); |
0d613a27 | 1600 | spin_unlock(&card->lock); |
1da177e4 LT |
1601 | card->stats.tx_bytes += skb->len; |
1602 | card->stats.tx_packets++; | |
1603 | dev_kfree_skb(skb); | |
0d613a27 FP |
1604 | netif_wake_queue(card->dev); |
1605 | spin_lock(&card->lock); | |
1606 | if (card->tx_emitted <= 0 && card->tx_buffer != NULL) | |
1da177e4 LT |
1607 | /* If this is the first tx buffer emit it immediately. */ |
1608 | __lcs_emit_txbuffer(card); | |
0d613a27 FP |
1609 | out: |
1610 | spin_unlock(&card->lock); | |
1611 | return rc; | |
1da177e4 LT |
1612 | } |
1613 | ||
1614 | static int | |
1615 | lcs_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1616 | { | |
1617 | struct lcs_card *card; | |
1618 | int rc; | |
1619 | ||
1620 | LCS_DBF_TEXT(5, trace, "pktxmit"); | |
ad660e2f | 1621 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 | 1622 | rc = __lcs_start_xmit(card, skb, dev); |
1da177e4 LT |
1623 | return rc; |
1624 | } | |
1625 | ||
1626 | /** | |
1627 | * send startlan and lanstat command to make LCS device ready | |
1628 | */ | |
1629 | static int | |
1630 | lcs_startlan_auto(struct lcs_card *card) | |
1631 | { | |
1632 | int rc; | |
1633 | ||
1634 | LCS_DBF_TEXT(2, trace, "strtauto"); | |
1635 | #ifdef CONFIG_NET_ETHERNET | |
1636 | card->lan_type = LCS_FRAME_TYPE_ENET; | |
1637 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1638 | if (rc == 0) | |
1639 | return 0; | |
1640 | ||
1641 | #endif | |
1642 | #ifdef CONFIG_TR | |
1643 | card->lan_type = LCS_FRAME_TYPE_TR; | |
1644 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1645 | if (rc == 0) | |
1646 | return 0; | |
1647 | #endif | |
1648 | #ifdef CONFIG_FDDI | |
1649 | card->lan_type = LCS_FRAME_TYPE_FDDI; | |
1650 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1651 | if (rc == 0) | |
1652 | return 0; | |
1653 | #endif | |
1654 | return -EIO; | |
1655 | } | |
1656 | ||
1657 | static int | |
1658 | lcs_startlan(struct lcs_card *card) | |
1659 | { | |
1660 | int rc, i; | |
1661 | ||
1662 | LCS_DBF_TEXT(2, trace, "startlan"); | |
1663 | rc = 0; | |
1664 | if (card->portno != LCS_INVALID_PORT_NO) { | |
1665 | if (card->lan_type == LCS_FRAME_TYPE_AUTO) | |
1666 | rc = lcs_startlan_auto(card); | |
1667 | else | |
1668 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1669 | } else { | |
1670 | for (i = 0; i <= 16; i++) { | |
1671 | card->portno = i; | |
1672 | if (card->lan_type != LCS_FRAME_TYPE_AUTO) | |
1673 | rc = lcs_send_startlan(card, | |
1674 | LCS_INITIATOR_TCPIP); | |
1675 | else | |
1676 | /* autodetecting lan type */ | |
1677 | rc = lcs_startlan_auto(card); | |
1678 | if (rc == 0) | |
1679 | break; | |
1680 | } | |
1681 | } | |
1682 | if (rc == 0) | |
1683 | return lcs_send_lanstat(card); | |
1684 | return rc; | |
1685 | } | |
1686 | ||
1687 | /** | |
1688 | * LCS detect function | |
1689 | * setup channels and make them I/O ready | |
1690 | */ | |
1691 | static int | |
1692 | lcs_detect(struct lcs_card *card) | |
1693 | { | |
1694 | int rc = 0; | |
1695 | ||
1696 | LCS_DBF_TEXT(2, setup, "lcsdetct"); | |
1697 | /* start/reset card */ | |
1698 | if (card->dev) | |
1699 | netif_stop_queue(card->dev); | |
1700 | rc = lcs_stop_channels(card); | |
1701 | if (rc == 0) { | |
1702 | rc = lcs_start_channels(card); | |
1703 | if (rc == 0) { | |
1704 | rc = lcs_send_startup(card, LCS_INITIATOR_TCPIP); | |
1705 | if (rc == 0) | |
1706 | rc = lcs_startlan(card); | |
1707 | } | |
1708 | } | |
1709 | if (rc == 0) { | |
1710 | card->state = DEV_STATE_UP; | |
1711 | } else { | |
1712 | card->state = DEV_STATE_DOWN; | |
9163bb2e UB |
1713 | card->write.state = LCS_CH_STATE_INIT; |
1714 | card->read.state = LCS_CH_STATE_INIT; | |
1da177e4 LT |
1715 | } |
1716 | return rc; | |
1717 | } | |
1718 | ||
1da177e4 LT |
1719 | /** |
1720 | * LCS Stop card | |
1721 | */ | |
1722 | static int | |
1723 | lcs_stopcard(struct lcs_card *card) | |
1724 | { | |
1725 | int rc; | |
1726 | ||
1727 | LCS_DBF_TEXT(3, setup, "stopcard"); | |
1728 | ||
9163bb2e UB |
1729 | if (card->read.state != LCS_CH_STATE_STOPPED && |
1730 | card->write.state != LCS_CH_STATE_STOPPED && | |
59579da3 KW |
1731 | card->read.state != LCS_CH_STATE_ERROR && |
1732 | card->write.state != LCS_CH_STATE_ERROR && | |
1da177e4 LT |
1733 | card->state == DEV_STATE_UP) { |
1734 | lcs_clear_multicast_list(card); | |
1735 | rc = lcs_send_stoplan(card,LCS_INITIATOR_TCPIP); | |
1736 | rc = lcs_send_shutdown(card); | |
1737 | } | |
1738 | rc = lcs_stop_channels(card); | |
1739 | card->state = DEV_STATE_DOWN; | |
1740 | ||
1741 | return rc; | |
1742 | } | |
1743 | ||
1da177e4 LT |
1744 | /** |
1745 | * Kernel Thread helper functions for LGW initiated commands | |
1746 | */ | |
1747 | static void | |
4927b3f7 | 1748 | lcs_start_kernel_thread(struct work_struct *work) |
1da177e4 | 1749 | { |
4927b3f7 | 1750 | struct lcs_card *card = container_of(work, struct lcs_card, kernel_thread_starter); |
1da177e4 | 1751 | LCS_DBF_TEXT(5, trace, "krnthrd"); |
27eb5ac8 | 1752 | if (lcs_do_start_thread(card, LCS_RECOVERY_THREAD)) |
e5b5719b | 1753 | kthread_run(lcs_recovery, card, "lcs_recover"); |
1da177e4 LT |
1754 | #ifdef CONFIG_IP_MULTICAST |
1755 | if (lcs_do_start_thread(card, LCS_SET_MC_THREAD)) | |
e5b5719b | 1756 | kthread_run(lcs_register_mc_addresses, card, "regipm"); |
1da177e4 LT |
1757 | #endif |
1758 | } | |
1759 | ||
1760 | /** | |
1761 | * Process control frames. | |
1762 | */ | |
1763 | static void | |
1764 | lcs_get_control(struct lcs_card *card, struct lcs_cmd *cmd) | |
1765 | { | |
1766 | LCS_DBF_TEXT(5, trace, "getctrl"); | |
1767 | if (cmd->initiator == LCS_INITIATOR_LGW) { | |
1768 | switch(cmd->cmd_code) { | |
1769 | case LCS_CMD_STARTUP: | |
1da177e4 | 1770 | case LCS_CMD_STARTLAN: |
27eb5ac8 | 1771 | lcs_schedule_recovery(card); |
1da177e4 LT |
1772 | break; |
1773 | case LCS_CMD_STOPLAN: | |
c99fc5da KW |
1774 | pr_warning("Stoplan for %s initiated by LGW.\n", |
1775 | card->dev->name); | |
27eb5ac8 KW |
1776 | if (card->dev) |
1777 | netif_carrier_off(card->dev); | |
1da177e4 LT |
1778 | break; |
1779 | default: | |
6b648063 | 1780 | LCS_DBF_TEXT(5, trace, "noLGWcmd"); |
1da177e4 LT |
1781 | break; |
1782 | } | |
1783 | } else | |
1784 | lcs_notify_lancmd_waiters(card, cmd); | |
1785 | } | |
1786 | ||
1787 | /** | |
1788 | * Unpack network packet. | |
1789 | */ | |
1790 | static void | |
1791 | lcs_get_skb(struct lcs_card *card, char *skb_data, unsigned int skb_len) | |
1792 | { | |
1793 | struct sk_buff *skb; | |
1794 | ||
1795 | LCS_DBF_TEXT(5, trace, "getskb"); | |
1796 | if (card->dev == NULL || | |
1797 | card->state != DEV_STATE_UP) | |
1798 | /* The card isn't up. Ignore the packet. */ | |
1799 | return; | |
1800 | ||
1801 | skb = dev_alloc_skb(skb_len); | |
1802 | if (skb == NULL) { | |
c99fc5da KW |
1803 | dev_err(&card->dev->dev, |
1804 | " Allocating a socket buffer to interface %s failed\n", | |
1da177e4 LT |
1805 | card->dev->name); |
1806 | card->stats.rx_dropped++; | |
1807 | return; | |
1808 | } | |
1da177e4 LT |
1809 | memcpy(skb_put(skb, skb_len), skb_data, skb_len); |
1810 | skb->protocol = card->lan_type_trans(skb, card->dev); | |
1811 | card->stats.rx_bytes += skb_len; | |
1812 | card->stats.rx_packets++; | |
93ad37d9 KW |
1813 | if (skb->protocol == htons(ETH_P_802_2)) |
1814 | *((__u32 *)skb->cb) = ++card->pkt_seq; | |
1da177e4 LT |
1815 | netif_rx(skb); |
1816 | } | |
1817 | ||
1818 | /** | |
1819 | * LCS main routine to get packets and lancmd replies from the buffers | |
1820 | */ | |
1821 | static void | |
1822 | lcs_get_frames_cb(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
1823 | { | |
1824 | struct lcs_card *card; | |
1825 | struct lcs_header *lcs_hdr; | |
1826 | __u16 offset; | |
1827 | ||
1828 | LCS_DBF_TEXT(5, trace, "lcsgtpkt"); | |
1829 | lcs_hdr = (struct lcs_header *) buffer->data; | |
1830 | if (lcs_hdr->offset == LCS_ILLEGAL_OFFSET) { | |
1831 | LCS_DBF_TEXT(4, trace, "-eiogpkt"); | |
1832 | return; | |
1833 | } | |
b385a144 | 1834 | card = container_of(channel, struct lcs_card, read); |
1da177e4 LT |
1835 | offset = 0; |
1836 | while (lcs_hdr->offset != 0) { | |
1837 | if (lcs_hdr->offset <= 0 || | |
1838 | lcs_hdr->offset > LCS_IOBUFFERSIZE || | |
1839 | lcs_hdr->offset < offset) { | |
1840 | /* Offset invalid. */ | |
1841 | card->stats.rx_length_errors++; | |
1842 | card->stats.rx_errors++; | |
1843 | return; | |
1844 | } | |
1845 | /* What kind of frame is it? */ | |
1846 | if (lcs_hdr->type == LCS_FRAME_TYPE_CONTROL) | |
1847 | /* Control frame. */ | |
1848 | lcs_get_control(card, (struct lcs_cmd *) lcs_hdr); | |
1849 | else if (lcs_hdr->type == LCS_FRAME_TYPE_ENET || | |
1850 | lcs_hdr->type == LCS_FRAME_TYPE_TR || | |
1851 | lcs_hdr->type == LCS_FRAME_TYPE_FDDI) | |
1852 | /* Normal network packet. */ | |
1853 | lcs_get_skb(card, (char *)(lcs_hdr + 1), | |
1854 | lcs_hdr->offset - offset - | |
1855 | sizeof(struct lcs_header)); | |
1856 | else | |
1857 | /* Unknown frame type. */ | |
1858 | ; // FIXME: error message ? | |
1859 | /* Proceed to next frame. */ | |
1860 | offset = lcs_hdr->offset; | |
1861 | lcs_hdr->offset = LCS_ILLEGAL_OFFSET; | |
1862 | lcs_hdr = (struct lcs_header *) (buffer->data + offset); | |
1863 | } | |
1864 | /* The buffer is now empty. Make it ready again. */ | |
1865 | lcs_ready_buffer(&card->read, buffer); | |
1866 | } | |
1867 | ||
1868 | /** | |
1869 | * get network statistics for ifconfig and other user programs | |
1870 | */ | |
1871 | static struct net_device_stats * | |
1872 | lcs_getstats(struct net_device *dev) | |
1873 | { | |
1874 | struct lcs_card *card; | |
1875 | ||
1876 | LCS_DBF_TEXT(4, trace, "netstats"); | |
ad660e2f | 1877 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 LT |
1878 | return &card->stats; |
1879 | } | |
1880 | ||
1881 | /** | |
1882 | * stop lcs device | |
1883 | * This function will be called by user doing ifconfig xxx down | |
1884 | */ | |
1885 | static int | |
1886 | lcs_stop_device(struct net_device *dev) | |
1887 | { | |
1888 | struct lcs_card *card; | |
1889 | int rc; | |
1890 | ||
1891 | LCS_DBF_TEXT(2, trace, "stopdev"); | |
ad660e2f | 1892 | card = (struct lcs_card *) dev->ml_priv; |
27eb5ac8 KW |
1893 | netif_carrier_off(dev); |
1894 | netif_tx_disable(dev); | |
1da177e4 | 1895 | dev->flags &= ~IFF_UP; |
27eb5ac8 | 1896 | wait_event(card->write.wait_q, |
9163bb2e | 1897 | (card->write.state != LCS_CH_STATE_RUNNING)); |
1da177e4 LT |
1898 | rc = lcs_stopcard(card); |
1899 | if (rc) | |
c99fc5da KW |
1900 | dev_err(&card->dev->dev, |
1901 | " Shutting down the LCS device failed\n "); | |
1da177e4 LT |
1902 | return rc; |
1903 | } | |
1904 | ||
1905 | /** | |
1906 | * start lcs device and make it runnable | |
1907 | * This function will be called by user doing ifconfig xxx up | |
1908 | */ | |
1909 | static int | |
1910 | lcs_open_device(struct net_device *dev) | |
1911 | { | |
1912 | struct lcs_card *card; | |
1913 | int rc; | |
1914 | ||
1915 | LCS_DBF_TEXT(2, trace, "opendev"); | |
ad660e2f | 1916 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 LT |
1917 | /* initialize statistics */ |
1918 | rc = lcs_detect(card); | |
1919 | if (rc) { | |
c99fc5da | 1920 | pr_err("Error in opening device!\n"); |
1da177e4 LT |
1921 | |
1922 | } else { | |
1923 | dev->flags |= IFF_UP; | |
27eb5ac8 | 1924 | netif_carrier_on(dev); |
1da177e4 LT |
1925 | netif_wake_queue(dev); |
1926 | card->state = DEV_STATE_UP; | |
1927 | } | |
1928 | return rc; | |
1929 | } | |
1930 | ||
1931 | /** | |
1932 | * show function for portno called by cat or similar things | |
1933 | */ | |
1934 | static ssize_t | |
3fd3c0a5 | 1935 | lcs_portno_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1936 | { |
1937 | struct lcs_card *card; | |
1938 | ||
dff59b64 | 1939 | card = dev_get_drvdata(dev); |
1da177e4 LT |
1940 | |
1941 | if (!card) | |
1942 | return 0; | |
1943 | ||
1944 | return sprintf(buf, "%d\n", card->portno); | |
1945 | } | |
1946 | ||
1947 | /** | |
1948 | * store the value which is piped to file portno | |
1949 | */ | |
1950 | static ssize_t | |
3fd3c0a5 | 1951 | lcs_portno_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1952 | { |
1953 | struct lcs_card *card; | |
1954 | int value; | |
1955 | ||
dff59b64 | 1956 | card = dev_get_drvdata(dev); |
1da177e4 LT |
1957 | |
1958 | if (!card) | |
1959 | return 0; | |
1960 | ||
1961 | sscanf(buf, "%u", &value); | |
1962 | /* TODO: sanity checks */ | |
1963 | card->portno = value; | |
1964 | ||
1965 | return count; | |
1966 | ||
1967 | } | |
1968 | ||
1969 | static DEVICE_ATTR(portno, 0644, lcs_portno_show, lcs_portno_store); | |
1970 | ||
1971 | static ssize_t | |
3fd3c0a5 | 1972 | lcs_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1973 | { |
1974 | struct ccwgroup_device *cgdev; | |
1975 | ||
1976 | cgdev = to_ccwgroupdev(dev); | |
1977 | if (!cgdev) | |
1978 | return -ENODEV; | |
1979 | ||
1980 | return sprintf(buf, "%s\n", cu3088_type[cgdev->cdev[0]->id.driver_info]); | |
1981 | } | |
1982 | ||
1983 | static DEVICE_ATTR(type, 0444, lcs_type_show, NULL); | |
1984 | ||
1985 | static ssize_t | |
3fd3c0a5 | 1986 | lcs_timeout_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1987 | { |
1988 | struct lcs_card *card; | |
1989 | ||
dff59b64 | 1990 | card = dev_get_drvdata(dev); |
1da177e4 LT |
1991 | |
1992 | return card ? sprintf(buf, "%u\n", card->lancmd_timeout) : 0; | |
1993 | } | |
1994 | ||
1995 | static ssize_t | |
3fd3c0a5 | 1996 | lcs_timeout_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1997 | { |
1998 | struct lcs_card *card; | |
1999 | int value; | |
2000 | ||
dff59b64 | 2001 | card = dev_get_drvdata(dev); |
1da177e4 LT |
2002 | |
2003 | if (!card) | |
2004 | return 0; | |
2005 | ||
2006 | sscanf(buf, "%u", &value); | |
2007 | /* TODO: sanity checks */ | |
2008 | card->lancmd_timeout = value; | |
2009 | ||
2010 | return count; | |
2011 | ||
2012 | } | |
2013 | ||
2b67fc46 | 2014 | static DEVICE_ATTR(lancmd_timeout, 0644, lcs_timeout_show, lcs_timeout_store); |
1da177e4 | 2015 | |
27eb5ac8 | 2016 | static ssize_t |
e82b0f2c | 2017 | lcs_dev_recover_store(struct device *dev, struct device_attribute *attr, |
27eb5ac8 KW |
2018 | const char *buf, size_t count) |
2019 | { | |
dff59b64 | 2020 | struct lcs_card *card = dev_get_drvdata(dev); |
27eb5ac8 KW |
2021 | char *tmp; |
2022 | int i; | |
2023 | ||
2024 | if (!card) | |
2025 | return -EINVAL; | |
2026 | if (card->state != DEV_STATE_UP) | |
2027 | return -EPERM; | |
2028 | i = simple_strtoul(buf, &tmp, 16); | |
2029 | if (i == 1) | |
2030 | lcs_schedule_recovery(card); | |
2031 | return count; | |
2032 | } | |
2033 | ||
2034 | static DEVICE_ATTR(recover, 0200, NULL, lcs_dev_recover_store); | |
2035 | ||
1da177e4 LT |
2036 | static struct attribute * lcs_attrs[] = { |
2037 | &dev_attr_portno.attr, | |
2038 | &dev_attr_type.attr, | |
2039 | &dev_attr_lancmd_timeout.attr, | |
27eb5ac8 | 2040 | &dev_attr_recover.attr, |
1da177e4 LT |
2041 | NULL, |
2042 | }; | |
2043 | ||
2044 | static struct attribute_group lcs_attr_group = { | |
2045 | .attrs = lcs_attrs, | |
2046 | }; | |
2047 | ||
2048 | /** | |
2049 | * lcs_probe_device is called on establishing a new ccwgroup_device. | |
2050 | */ | |
2051 | static int | |
2052 | lcs_probe_device(struct ccwgroup_device *ccwgdev) | |
2053 | { | |
2054 | struct lcs_card *card; | |
2055 | int ret; | |
2056 | ||
2057 | if (!get_device(&ccwgdev->dev)) | |
2058 | return -ENODEV; | |
2059 | ||
2060 | LCS_DBF_TEXT(2, setup, "add_dev"); | |
2061 | card = lcs_alloc_card(); | |
2062 | if (!card) { | |
6b648063 | 2063 | LCS_DBF_TEXT_(2, setup, " rc%d", -ENOMEM); |
1da177e4 LT |
2064 | put_device(&ccwgdev->dev); |
2065 | return -ENOMEM; | |
2066 | } | |
2067 | ret = sysfs_create_group(&ccwgdev->dev.kobj, &lcs_attr_group); | |
2068 | if (ret) { | |
1da177e4 LT |
2069 | lcs_free_card(card); |
2070 | put_device(&ccwgdev->dev); | |
2071 | return ret; | |
2072 | } | |
dff59b64 | 2073 | dev_set_drvdata(&ccwgdev->dev, card); |
1da177e4 LT |
2074 | ccwgdev->cdev[0]->handler = lcs_irq; |
2075 | ccwgdev->cdev[1]->handler = lcs_irq; | |
27eb5ac8 | 2076 | card->gdev = ccwgdev; |
4927b3f7 | 2077 | INIT_WORK(&card->kernel_thread_starter, lcs_start_kernel_thread); |
27eb5ac8 KW |
2078 | card->thread_start_mask = 0; |
2079 | card->thread_allowed_mask = 0; | |
2080 | card->thread_running_mask = 0; | |
1da177e4 LT |
2081 | return 0; |
2082 | } | |
2083 | ||
2084 | static int | |
2085 | lcs_register_netdev(struct ccwgroup_device *ccwgdev) | |
2086 | { | |
2087 | struct lcs_card *card; | |
2088 | ||
2089 | LCS_DBF_TEXT(2, setup, "regnetdv"); | |
dff59b64 | 2090 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2091 | if (card->dev->reg_state != NETREG_UNINITIALIZED) |
2092 | return 0; | |
2093 | SET_NETDEV_DEV(card->dev, &ccwgdev->dev); | |
2094 | return register_netdev(card->dev); | |
2095 | } | |
2096 | ||
2097 | /** | |
2098 | * lcs_new_device will be called by setting the group device online. | |
2099 | */ | |
0e0b46d8 FB |
2100 | static const struct net_device_ops lcs_netdev_ops = { |
2101 | .ndo_open = lcs_open_device, | |
2102 | .ndo_stop = lcs_stop_device, | |
2103 | .ndo_get_stats = lcs_getstats, | |
2104 | .ndo_start_xmit = lcs_start_xmit, | |
2105 | }; | |
2106 | ||
2107 | static const struct net_device_ops lcs_mc_netdev_ops = { | |
2108 | .ndo_open = lcs_open_device, | |
2109 | .ndo_stop = lcs_stop_device, | |
2110 | .ndo_get_stats = lcs_getstats, | |
2111 | .ndo_start_xmit = lcs_start_xmit, | |
2112 | .ndo_set_multicast_list = lcs_set_multicast_list, | |
2113 | }; | |
1da177e4 LT |
2114 | |
2115 | static int | |
2116 | lcs_new_device(struct ccwgroup_device *ccwgdev) | |
2117 | { | |
2118 | struct lcs_card *card; | |
2119 | struct net_device *dev=NULL; | |
2120 | enum lcs_dev_states recover_state; | |
2121 | int rc; | |
2122 | ||
dff59b64 | 2123 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2124 | if (!card) |
2125 | return -ENODEV; | |
2126 | ||
2127 | LCS_DBF_TEXT(2, setup, "newdev"); | |
2128 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2129 | card->read.ccwdev = ccwgdev->cdev[0]; | |
2130 | card->write.ccwdev = ccwgdev->cdev[1]; | |
2131 | ||
2132 | recover_state = card->state; | |
d816d423 KDW |
2133 | rc = ccw_device_set_online(card->read.ccwdev); |
2134 | if (rc) | |
2135 | goto out_err; | |
2136 | rc = ccw_device_set_online(card->write.ccwdev); | |
2137 | if (rc) | |
2138 | goto out_werr; | |
1da177e4 LT |
2139 | |
2140 | LCS_DBF_TEXT(3, setup, "lcsnewdv"); | |
2141 | ||
2142 | lcs_setup_card(card); | |
2143 | rc = lcs_detect(card); | |
2144 | if (rc) { | |
2145 | LCS_DBF_TEXT(2, setup, "dtctfail"); | |
c99fc5da KW |
2146 | dev_err(&card->dev->dev, |
2147 | "Detecting a network adapter for LCS devices" | |
2148 | " failed with rc=%d (0x%x)\n", rc, rc); | |
1da177e4 LT |
2149 | lcs_stopcard(card); |
2150 | goto out; | |
2151 | } | |
2152 | if (card->dev) { | |
2153 | LCS_DBF_TEXT(2, setup, "samedev"); | |
2154 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2155 | goto netdev_out; | |
2156 | } | |
2157 | switch (card->lan_type) { | |
2158 | #ifdef CONFIG_NET_ETHERNET | |
2159 | case LCS_FRAME_TYPE_ENET: | |
2160 | card->lan_type_trans = eth_type_trans; | |
2161 | dev = alloc_etherdev(0); | |
2162 | break; | |
2163 | #endif | |
2164 | #ifdef CONFIG_TR | |
2165 | case LCS_FRAME_TYPE_TR: | |
2166 | card->lan_type_trans = tr_type_trans; | |
2167 | dev = alloc_trdev(0); | |
2168 | break; | |
2169 | #endif | |
2170 | #ifdef CONFIG_FDDI | |
2171 | case LCS_FRAME_TYPE_FDDI: | |
2172 | card->lan_type_trans = fddi_type_trans; | |
2173 | dev = alloc_fddidev(0); | |
2174 | break; | |
2175 | #endif | |
2176 | default: | |
2177 | LCS_DBF_TEXT(3, setup, "errinit"); | |
c99fc5da | 2178 | pr_err(" Initialization failed\n"); |
1da177e4 LT |
2179 | goto out; |
2180 | } | |
2181 | if (!dev) | |
2182 | goto out; | |
2183 | card->dev = dev; | |
ad660e2f | 2184 | card->dev->ml_priv = card; |
0e0b46d8 | 2185 | card->dev->netdev_ops = &lcs_netdev_ops; |
1da177e4 LT |
2186 | memcpy(card->dev->dev_addr, card->mac, LCS_MAC_LENGTH); |
2187 | #ifdef CONFIG_IP_MULTICAST | |
2188 | if (!lcs_check_multicast_support(card)) | |
0e0b46d8 | 2189 | card->dev->netdev_ops = &lcs_mc_netdev_ops; |
1da177e4 | 2190 | #endif |
b5f9d55b | 2191 | netdev_out: |
1da177e4 LT |
2192 | lcs_set_allowed_threads(card,0xffffffff); |
2193 | if (recover_state == DEV_STATE_RECOVER) { | |
2194 | lcs_set_multicast_list(card->dev); | |
2195 | card->dev->flags |= IFF_UP; | |
27eb5ac8 | 2196 | netif_carrier_on(card->dev); |
1da177e4 LT |
2197 | netif_wake_queue(card->dev); |
2198 | card->state = DEV_STATE_UP; | |
b5f9d55b | 2199 | } else { |
1da177e4 | 2200 | lcs_stopcard(card); |
b5f9d55b | 2201 | } |
1da177e4 | 2202 | |
b5f9d55b FP |
2203 | if (lcs_register_netdev(ccwgdev) != 0) |
2204 | goto out; | |
2205 | ||
2206 | /* Print out supported assists: IPv6 */ | |
c99fc5da KW |
2207 | pr_info("LCS device %s %s IPv6 support\n", card->dev->name, |
2208 | (card->ip_assists_supported & LCS_IPASS_IPV6_SUPPORT) ? | |
2209 | "with" : "without"); | |
b5f9d55b | 2210 | /* Print out supported assist: Multicast */ |
c99fc5da KW |
2211 | pr_info("LCS device %s %s Multicast support\n", card->dev->name, |
2212 | (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) ? | |
2213 | "with" : "without"); | |
1da177e4 LT |
2214 | return 0; |
2215 | out: | |
2216 | ||
1da177e4 | 2217 | ccw_device_set_offline(card->write.ccwdev); |
d816d423 KDW |
2218 | out_werr: |
2219 | ccw_device_set_offline(card->read.ccwdev); | |
2220 | out_err: | |
1da177e4 LT |
2221 | return -ENODEV; |
2222 | } | |
2223 | ||
2224 | /** | |
2225 | * lcs_shutdown_device, called when setting the group device offline. | |
2226 | */ | |
2227 | static int | |
27eb5ac8 | 2228 | __lcs_shutdown_device(struct ccwgroup_device *ccwgdev, int recovery_mode) |
1da177e4 LT |
2229 | { |
2230 | struct lcs_card *card; | |
2231 | enum lcs_dev_states recover_state; | |
2232 | int ret; | |
2233 | ||
2234 | LCS_DBF_TEXT(3, setup, "shtdndev"); | |
dff59b64 | 2235 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2236 | if (!card) |
2237 | return -ENODEV; | |
27eb5ac8 KW |
2238 | if (recovery_mode == 0) { |
2239 | lcs_set_allowed_threads(card, 0); | |
2240 | if (lcs_wait_for_threads(card, LCS_SET_MC_THREAD)) | |
2241 | return -ERESTARTSYS; | |
2242 | } | |
1da177e4 LT |
2243 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); |
2244 | recover_state = card->state; | |
2245 | ||
2246 | ret = lcs_stop_device(card->dev); | |
2247 | ret = ccw_device_set_offline(card->read.ccwdev); | |
2248 | ret = ccw_device_set_offline(card->write.ccwdev); | |
2249 | if (recover_state == DEV_STATE_UP) { | |
2250 | card->state = DEV_STATE_RECOVER; | |
2251 | } | |
2252 | if (ret) | |
2253 | return ret; | |
2254 | return 0; | |
2255 | } | |
2256 | ||
27eb5ac8 KW |
2257 | static int |
2258 | lcs_shutdown_device(struct ccwgroup_device *ccwgdev) | |
2259 | { | |
2260 | return __lcs_shutdown_device(ccwgdev, 0); | |
2261 | } | |
2262 | ||
2263 | /** | |
2264 | * drive lcs recovery after startup and startlan initiated by Lan Gateway | |
2265 | */ | |
2266 | static int | |
2267 | lcs_recovery(void *ptr) | |
2268 | { | |
2269 | struct lcs_card *card; | |
2270 | struct ccwgroup_device *gdev; | |
2271 | int rc; | |
2272 | ||
2273 | card = (struct lcs_card *) ptr; | |
27eb5ac8 KW |
2274 | |
2275 | LCS_DBF_TEXT(4, trace, "recover1"); | |
2276 | if (!lcs_do_run_thread(card, LCS_RECOVERY_THREAD)) | |
2277 | return 0; | |
2278 | LCS_DBF_TEXT(4, trace, "recover2"); | |
2279 | gdev = card->gdev; | |
c99fc5da KW |
2280 | dev_warn(&gdev->dev, |
2281 | "A recovery process has been started for the LCS device\n"); | |
27eb5ac8 KW |
2282 | rc = __lcs_shutdown_device(gdev, 1); |
2283 | rc = lcs_new_device(gdev); | |
2284 | if (!rc) | |
c99fc5da KW |
2285 | pr_info("Device %s successfully recovered!\n", |
2286 | card->dev->name); | |
27eb5ac8 | 2287 | else |
c99fc5da KW |
2288 | pr_info("Device %s could not be recovered!\n", |
2289 | card->dev->name); | |
27eb5ac8 KW |
2290 | lcs_clear_thread_running_bit(card, LCS_RECOVERY_THREAD); |
2291 | return 0; | |
2292 | } | |
2293 | ||
1da177e4 LT |
2294 | /** |
2295 | * lcs_remove_device, free buffers and card | |
2296 | */ | |
2297 | static void | |
2298 | lcs_remove_device(struct ccwgroup_device *ccwgdev) | |
2299 | { | |
2300 | struct lcs_card *card; | |
2301 | ||
dff59b64 | 2302 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2303 | if (!card) |
2304 | return; | |
2305 | ||
1da177e4 LT |
2306 | LCS_DBF_TEXT(3, setup, "remdev"); |
2307 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2308 | if (ccwgdev->state == CCWGROUP_ONLINE) { | |
2309 | lcs_shutdown_device(ccwgdev); | |
2310 | } | |
2311 | if (card->dev) | |
2312 | unregister_netdev(card->dev); | |
2313 | sysfs_remove_group(&ccwgdev->dev.kobj, &lcs_attr_group); | |
2314 | lcs_cleanup_card(card); | |
2315 | lcs_free_card(card); | |
2316 | put_device(&ccwgdev->dev); | |
2317 | } | |
2318 | ||
cbb2aec3 KDW |
2319 | static int lcs_pm_suspend(struct lcs_card *card) |
2320 | { | |
2321 | if (card->dev) | |
2322 | netif_device_detach(card->dev); | |
2323 | lcs_set_allowed_threads(card, 0); | |
2324 | lcs_wait_for_threads(card, 0xffffffff); | |
2325 | if (card->state != DEV_STATE_DOWN) | |
2326 | __lcs_shutdown_device(card->gdev, 1); | |
2327 | return 0; | |
2328 | } | |
2329 | ||
2330 | static int lcs_pm_resume(struct lcs_card *card) | |
2331 | { | |
2332 | int rc = 0; | |
2333 | ||
2334 | if (card->state == DEV_STATE_RECOVER) | |
2335 | rc = lcs_new_device(card->gdev); | |
2336 | if (card->dev) | |
2337 | netif_device_attach(card->dev); | |
2338 | if (rc) { | |
2339 | dev_warn(&card->gdev->dev, "The lcs device driver " | |
2340 | "failed to recover the device\n"); | |
2341 | } | |
2342 | return rc; | |
2343 | } | |
2344 | ||
2345 | static int lcs_prepare(struct ccwgroup_device *gdev) | |
2346 | { | |
2347 | return 0; | |
2348 | } | |
2349 | ||
2350 | static void lcs_complete(struct ccwgroup_device *gdev) | |
2351 | { | |
2352 | return; | |
2353 | } | |
2354 | ||
2355 | static int lcs_freeze(struct ccwgroup_device *gdev) | |
2356 | { | |
2357 | struct lcs_card *card = dev_get_drvdata(&gdev->dev); | |
2358 | return lcs_pm_suspend(card); | |
2359 | } | |
2360 | ||
2361 | static int lcs_thaw(struct ccwgroup_device *gdev) | |
2362 | { | |
2363 | struct lcs_card *card = dev_get_drvdata(&gdev->dev); | |
2364 | return lcs_pm_resume(card); | |
2365 | } | |
2366 | ||
2367 | static int lcs_restore(struct ccwgroup_device *gdev) | |
2368 | { | |
2369 | struct lcs_card *card = dev_get_drvdata(&gdev->dev); | |
2370 | return lcs_pm_resume(card); | |
2371 | } | |
2372 | ||
1da177e4 LT |
2373 | /** |
2374 | * LCS ccwgroup driver registration | |
2375 | */ | |
2376 | static struct ccwgroup_driver lcs_group_driver = { | |
2377 | .owner = THIS_MODULE, | |
2378 | .name = "lcs", | |
2379 | .max_slaves = 2, | |
2380 | .driver_id = 0xD3C3E2, | |
2381 | .probe = lcs_probe_device, | |
2382 | .remove = lcs_remove_device, | |
2383 | .set_online = lcs_new_device, | |
2384 | .set_offline = lcs_shutdown_device, | |
cbb2aec3 KDW |
2385 | .prepare = lcs_prepare, |
2386 | .complete = lcs_complete, | |
2387 | .freeze = lcs_freeze, | |
2388 | .thaw = lcs_thaw, | |
2389 | .restore = lcs_restore, | |
1da177e4 LT |
2390 | }; |
2391 | ||
2392 | /** | |
2393 | * LCS Module/Kernel initialization function | |
2394 | */ | |
2395 | static int | |
2396 | __init lcs_init_module(void) | |
2397 | { | |
2398 | int rc; | |
2399 | ||
c99fc5da | 2400 | pr_info("Loading %s\n", version); |
1da177e4 LT |
2401 | rc = lcs_register_debug_facility(); |
2402 | LCS_DBF_TEXT(0, setup, "lcsinit"); | |
2403 | if (rc) { | |
c99fc5da | 2404 | pr_err("Initialization failed\n"); |
1da177e4 LT |
2405 | return rc; |
2406 | } | |
2407 | ||
2408 | rc = register_cu3088_discipline(&lcs_group_driver); | |
2409 | if (rc) { | |
c99fc5da | 2410 | pr_err("Initialization failed\n"); |
1da177e4 LT |
2411 | return rc; |
2412 | } | |
1da177e4 LT |
2413 | return 0; |
2414 | } | |
2415 | ||
2416 | ||
2417 | /** | |
2418 | * LCS module cleanup function | |
2419 | */ | |
2420 | static void | |
2421 | __exit lcs_cleanup_module(void) | |
2422 | { | |
c99fc5da | 2423 | pr_info("Terminating lcs module.\n"); |
1da177e4 LT |
2424 | LCS_DBF_TEXT(0, trace, "cleanup"); |
2425 | unregister_cu3088_discipline(&lcs_group_driver); | |
2426 | lcs_unregister_debug_facility(); | |
2427 | } | |
2428 | ||
2429 | module_init(lcs_init_module); | |
2430 | module_exit(lcs_cleanup_module); | |
2431 | ||
1387780f | 2432 | MODULE_AUTHOR("Frank Pavlic <fpavlic@de.ibm.com>"); |
1da177e4 LT |
2433 | MODULE_LICENSE("GPL"); |
2434 |