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1da177e4 1/*
1da177e4
LT		 2 * Linux for S/390 Lan Channel Station Network Driver
3 *
cbb2aec3
KDW		 4 * Copyright IBM Corp. 1999, 2009
5 * Author(s): Original Code written by
6 * DJ Barrow <djbarrow@de.ibm.com,barrow_dj@yahoo.com>
7 * Rewritten by
8 * Frank Pavlic <fpavlic@de.ibm.com> and
9 * Martin Schwidefsky <schwidefsky@de.ibm.com>
1da177e4 10 *
1da177e4
LT		 11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
14 * any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 */
25
c99fc5da
KW		 26#define KMSG_COMPONENT "lcs"
27#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
28
096a6168 29#include <linux/kernel_stat.h>
1da177e4
LT		 30#include <linux/module.h>
31#include <linux/if.h>
32#include <linux/netdevice.h>
33#include <linux/etherdevice.h>
34#include <linux/trdevice.h>
35#include <linux/fddidevice.h>
36#include <linux/inetdevice.h>
37#include <linux/in.h>
38#include <linux/igmp.h>
39#include <linux/delay.h>
e5b5719b 40#include <linux/kthread.h>
5a0e3ad6 41#include <linux/slab.h>
1da177e4
LT		 42#include <net/arp.h>
43#include <net/ip.h>
44
45#include <asm/debug.h>
46#include <asm/idals.h>
47#include <asm/timex.h>
48#include <linux/device.h>
49#include <asm/ccwgroup.h>
50
51#include "lcs.h"
1da177e4
LT		 52
53
54#if !defined(CONFIG_NET_ETHERNET) && \
55 !defined(CONFIG_TR) && !defined(CONFIG_FDDI)
56#error Cannot compile lcs.c without some net devices switched on.
57#endif
58
59/**
60 * initialization string for output
61 */
1da177e4 62
e018ba1f 63static char version[] __initdata = "LCS driver";
0ca8cc6f
UB		 64
65/**
66 * the root device for lcs group devices
67 */
68static struct device *lcs_root_dev;
1da177e4
LT		 69
70/**
71 * Some prototypes.
72 */
73static void lcs_tasklet(unsigned long);
4927b3f7 74static void lcs_start_kernel_thread(struct work_struct *);
1da177e4 75static void lcs_get_frames_cb(struct lcs_channel *, struct lcs_buffer *);
801599b0 76#ifdef CONFIG_IP_MULTICAST
1da177e4 77static int lcs_send_delipm(struct lcs_card *, struct lcs_ipm_list *);
801599b0 78#endif /* CONFIG_IP_MULTICAST */
27eb5ac8 79static int lcs_recovery(void *ptr);
1da177e4
LT		 80
81/**
82 * Debug Facility Stuff
83 */
0ca8cc6f 84static char debug_buffer[255];
1da177e4
LT		 85static debug_info_t *lcs_dbf_setup;
86static debug_info_t *lcs_dbf_trace;
87
88/**
89 * LCS Debug Facility functions
90 */
91static void
92lcs_unregister_debug_facility(void)
93{
94 if (lcs_dbf_setup)
95 debug_unregister(lcs_dbf_setup);
96 if (lcs_dbf_trace)
97 debug_unregister(lcs_dbf_trace);
98}
99
100static int
101lcs_register_debug_facility(void)
102{
66a464db 103 lcs_dbf_setup = debug_register("lcs_setup", 2, 1, 8);
164b0fb1 104 lcs_dbf_trace = debug_register("lcs_trace", 4, 1, 8);
1da177e4 105 if (lcs_dbf_setup == NULL || lcs_dbf_trace == NULL) {
c99fc5da 106 pr_err("Not enough memory for debug facility.\n");
1da177e4
LT		 107 lcs_unregister_debug_facility();
108 return -ENOMEM;
109 }
110 debug_register_view(lcs_dbf_setup, &debug_hex_ascii_view);
0d613a27 111 debug_set_level(lcs_dbf_setup, 2);
1da177e4 112 debug_register_view(lcs_dbf_trace, &debug_hex_ascii_view);
0d613a27 113 debug_set_level(lcs_dbf_trace, 2);
1da177e4
LT		 114 return 0;
115}
116
117/**
118 * Allocate io buffers.
119 */
120static int
121lcs_alloc_channel(struct lcs_channel *channel)
122{
123 int cnt;
124
125 LCS_DBF_TEXT(2, setup, "ichalloc");
126 for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
127 /* alloc memory fo iobuffer */
88abaab4
ES		 128 channel->iob[cnt].data =
129 kzalloc(LCS_IOBUFFERSIZE, GFP_DMA | GFP_KERNEL);
1da177e4
LT		 130 if (channel->iob[cnt].data == NULL)
131 break;
9163bb2e 132 channel->iob[cnt].state = LCS_BUF_STATE_EMPTY;
1da177e4
LT		 133 }
134 if (cnt < LCS_NUM_BUFFS) {
135 /* Not all io buffers could be allocated. */
136 LCS_DBF_TEXT(2, setup, "echalloc");
137 while (cnt-- > 0)
138 kfree(channel->iob[cnt].data);
139 return -ENOMEM;
140 }
141 return 0;
142}
143
144/**
145 * Free io buffers.
146 */
147static void
148lcs_free_channel(struct lcs_channel *channel)
149{
150 int cnt;
151
152 LCS_DBF_TEXT(2, setup, "ichfree");
153 for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
17fd682e 154 kfree(channel->iob[cnt].data);
1da177e4
LT		 155 channel->iob[cnt].data = NULL;
156 }
157}
158
159/*
160 * Cleanup channel.
161 */
162static void
163lcs_cleanup_channel(struct lcs_channel *channel)
164{
165 LCS_DBF_TEXT(3, setup, "cleanch");
166 /* Kill write channel tasklets. */
167 tasklet_kill(&channel->irq_tasklet);
168 /* Free channel buffers. */
169 lcs_free_channel(channel);
170}
171
172/**
173 * LCS free memory for card and channels.
174 */
175static void
176lcs_free_card(struct lcs_card *card)
177{
178 LCS_DBF_TEXT(2, setup, "remcard");
179 LCS_DBF_HEX(2, setup, &card, sizeof(void*));
180 kfree(card);
181}
182
183/**
184 * LCS alloc memory for card and channels
185 */
186static struct lcs_card *
187lcs_alloc_card(void)
188{
189 struct lcs_card *card;
190 int rc;
191
192 LCS_DBF_TEXT(2, setup, "alloclcs");
193
88abaab4 194 card = kzalloc(sizeof(struct lcs_card), GFP_KERNEL | GFP_DMA);
1da177e4
LT		 195 if (card == NULL)
196 return NULL;
1da177e4
LT		 197 card->lan_type = LCS_FRAME_TYPE_AUTO;
198 card->pkt_seq = 0;
199 card->lancmd_timeout = LCS_LANCMD_TIMEOUT_DEFAULT;
200 /* Allocate io buffers for the read channel. */
201 rc = lcs_alloc_channel(&card->read);
202 if (rc){
203 LCS_DBF_TEXT(2, setup, "iccwerr");
204 lcs_free_card(card);
205 return NULL;
206 }
207 /* Allocate io buffers for the write channel. */
208 rc = lcs_alloc_channel(&card->write);
209 if (rc) {
210 LCS_DBF_TEXT(2, setup, "iccwerr");
211 lcs_cleanup_channel(&card->read);
212 lcs_free_card(card);
213 return NULL;
214 }
215
216#ifdef CONFIG_IP_MULTICAST
217 INIT_LIST_HEAD(&card->ipm_list);
218#endif
219 LCS_DBF_HEX(2, setup, &card, sizeof(void*));
220 return card;
221}
222
223/*
224 * Setup read channel.
225 */
226static void
227lcs_setup_read_ccws(struct lcs_card *card)
228{
229 int cnt;
230
231 LCS_DBF_TEXT(2, setup, "ireadccw");
232 /* Setup read ccws. */
233 memset(card->read.ccws, 0, sizeof (struct ccw1) * (LCS_NUM_BUFFS + 1));
234 for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
235 card->read.ccws[cnt].cmd_code = LCS_CCW_READ;
236 card->read.ccws[cnt].count = LCS_IOBUFFERSIZE;
237 card->read.ccws[cnt].flags =
238 CCW_FLAG_CC | CCW_FLAG_SLI | CCW_FLAG_PCI;
239 /*
240 * Note: we have allocated the buffer with GFP_DMA, so
241 * we do not need to do set_normalized_cda.
242 */
243 card->read.ccws[cnt].cda =
244 (__u32) __pa(card->read.iob[cnt].data);
245 ((struct lcs_header *)
246 card->read.iob[cnt].data)->offset = LCS_ILLEGAL_OFFSET;
247 card->read.iob[cnt].callback = lcs_get_frames_cb;
9163bb2e 248 card->read.iob[cnt].state = LCS_BUF_STATE_READY;
1da177e4
LT		 249 card->read.iob[cnt].count = LCS_IOBUFFERSIZE;
250 }
251 card->read.ccws[0].flags &= ~CCW_FLAG_PCI;
252 card->read.ccws[LCS_NUM_BUFFS - 1].flags &= ~CCW_FLAG_PCI;
253 card->read.ccws[LCS_NUM_BUFFS - 1].flags |= CCW_FLAG_SUSPEND;
254 /* Last ccw is a tic (transfer in channel). */
255 card->read.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER;
256 card->read.ccws[LCS_NUM_BUFFS].cda =
257 (__u32) __pa(card->read.ccws);
258 /* Setg initial state of the read channel. */
9163bb2e 259 card->read.state = LCS_CH_STATE_INIT;
1da177e4
LT		 260
261 card->read.io_idx = 0;
262 card->read.buf_idx = 0;
263}
264
265static void
266lcs_setup_read(struct lcs_card *card)
267{
268 LCS_DBF_TEXT(3, setup, "initread");
269
270 lcs_setup_read_ccws(card);
271 /* Initialize read channel tasklet. */
272 card->read.irq_tasklet.data = (unsigned long) &card->read;
273 card->read.irq_tasklet.func = lcs_tasklet;
274 /* Initialize waitqueue. */
275 init_waitqueue_head(&card->read.wait_q);
276}
277
278/*
279 * Setup write channel.
280 */
281static void
282lcs_setup_write_ccws(struct lcs_card *card)
283{
284 int cnt;
285
286 LCS_DBF_TEXT(3, setup, "iwritccw");
287 /* Setup write ccws. */
288 memset(card->write.ccws, 0, sizeof(struct ccw1) * LCS_NUM_BUFFS + 1);
289 for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
290 card->write.ccws[cnt].cmd_code = LCS_CCW_WRITE;
291 card->write.ccws[cnt].count = 0;
292 card->write.ccws[cnt].flags =
293 CCW_FLAG_SUSPEND | CCW_FLAG_CC | CCW_FLAG_SLI;
294 /*
295 * Note: we have allocated the buffer with GFP_DMA, so
296 * we do not need to do set_normalized_cda.
297 */
298 card->write.ccws[cnt].cda =
299 (__u32) __pa(card->write.iob[cnt].data);
300 }
301 /* Last ccw is a tic (transfer in channel). */
302 card->write.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER;
303 card->write.ccws[LCS_NUM_BUFFS].cda =
304 (__u32) __pa(card->write.ccws);
305 /* Set initial state of the write channel. */
9163bb2e 306 card->read.state = LCS_CH_STATE_INIT;
1da177e4
LT		 307
308 card->write.io_idx = 0;
309 card->write.buf_idx = 0;
310}
311
312static void
313lcs_setup_write(struct lcs_card *card)
314{
315 LCS_DBF_TEXT(3, setup, "initwrit");
316
317 lcs_setup_write_ccws(card);
318 /* Initialize write channel tasklet. */
319 card->write.irq_tasklet.data = (unsigned long) &card->write;
320 card->write.irq_tasklet.func = lcs_tasklet;
321 /* Initialize waitqueue. */
322 init_waitqueue_head(&card->write.wait_q);
323}
324
325static void
326lcs_set_allowed_threads(struct lcs_card *card, unsigned long threads)
327{
328 unsigned long flags;
329
330 spin_lock_irqsave(&card->mask_lock, flags);
331 card->thread_allowed_mask = threads;
332 spin_unlock_irqrestore(&card->mask_lock, flags);
333 wake_up(&card->wait_q);
334}
335static inline int
336lcs_threads_running(struct lcs_card *card, unsigned long threads)
337{
338 unsigned long flags;
339 int rc = 0;
340
341 spin_lock_irqsave(&card->mask_lock, flags);
342 rc = (card->thread_running_mask & threads);
343 spin_unlock_irqrestore(&card->mask_lock, flags);
344 return rc;
345}
346
347static int
348lcs_wait_for_threads(struct lcs_card *card, unsigned long threads)
349{
350 return wait_event_interruptible(card->wait_q,
351 lcs_threads_running(card, threads) == 0);
352}
353
354static inline int
355lcs_set_thread_start_bit(struct lcs_card *card, unsigned long thread)
356{
357 unsigned long flags;
358
359 spin_lock_irqsave(&card->mask_lock, flags);
360 if ( !(card->thread_allowed_mask & thread) ||
361 (card->thread_start_mask & thread) ) {
362 spin_unlock_irqrestore(&card->mask_lock, flags);
363 return -EPERM;
364 }
365 card->thread_start_mask |= thread;
366 spin_unlock_irqrestore(&card->mask_lock, flags);
367 return 0;
368}
369
370static void
371lcs_clear_thread_running_bit(struct lcs_card *card, unsigned long thread)
372{
373 unsigned long flags;
374
375 spin_lock_irqsave(&card->mask_lock, flags);
376 card->thread_running_mask &= ~thread;
377 spin_unlock_irqrestore(&card->mask_lock, flags);
378 wake_up(&card->wait_q);
379}
380
381static inline int
382__lcs_do_run_thread(struct lcs_card *card, unsigned long thread)
383{
384 unsigned long flags;
385 int rc = 0;
386
387 spin_lock_irqsave(&card->mask_lock, flags);
388 if (card->thread_start_mask & thread){
389 if ((card->thread_allowed_mask & thread) &&
390 !(card->thread_running_mask & thread)){
391 rc = 1;
392 card->thread_start_mask &= ~thread;
393 card->thread_running_mask |= thread;
394 } else
395 rc = -EPERM;
396 }
397 spin_unlock_irqrestore(&card->mask_lock, flags);
398 return rc;
399}
400
401static int
402lcs_do_run_thread(struct lcs_card *card, unsigned long thread)
403{
404 int rc = 0;
405 wait_event(card->wait_q,
406 (rc = __lcs_do_run_thread(card, thread)) >= 0);
407 return rc;
408}
409
410static int
411lcs_do_start_thread(struct lcs_card *card, unsigned long thread)
412{
413 unsigned long flags;
414 int rc = 0;
415
416 spin_lock_irqsave(&card->mask_lock, flags);
417 LCS_DBF_TEXT_(4, trace, " %02x%02x%02x",
418 (u8) card->thread_start_mask,
419 (u8) card->thread_allowed_mask,
420 (u8) card->thread_running_mask);
421 rc = (card->thread_start_mask & thread);
422 spin_unlock_irqrestore(&card->mask_lock, flags);
423 return rc;
424}
425
426/**
427 * Initialize channels,card and state machines.
428 */
429static void
430lcs_setup_card(struct lcs_card *card)
431{
432 LCS_DBF_TEXT(2, setup, "initcard");
433 LCS_DBF_HEX(2, setup, &card, sizeof(void*));
434
435 lcs_setup_read(card);
436 lcs_setup_write(card);
437 /* Set cards initial state. */
438 card->state = DEV_STATE_DOWN;
439 card->tx_buffer = NULL;
440 card->tx_emitted = 0;
441
1da177e4
LT		 442 init_waitqueue_head(&card->wait_q);
443 spin_lock_init(&card->lock);
444 spin_lock_init(&card->ipm_lock);
445 spin_lock_init(&card->mask_lock);
446#ifdef CONFIG_IP_MULTICAST
447 INIT_LIST_HEAD(&card->ipm_list);
448#endif
449 INIT_LIST_HEAD(&card->lancmd_waiters);
450}
451
452static inline void
453lcs_clear_multicast_list(struct lcs_card *card)
454{
455#ifdef CONFIG_IP_MULTICAST
456 struct lcs_ipm_list *ipm;
457 unsigned long flags;
458
459 /* Free multicast list. */
460 LCS_DBF_TEXT(3, setup, "clmclist");
461 spin_lock_irqsave(&card->ipm_lock, flags);
462 while (!list_empty(&card->ipm_list)){
463 ipm = list_entry(card->ipm_list.next,
464 struct lcs_ipm_list, list);
465 list_del(&ipm->list);
466 if (ipm->ipm_state != LCS_IPM_STATE_SET_REQUIRED){
467 spin_unlock_irqrestore(&card->ipm_lock, flags);
468 lcs_send_delipm(card, ipm);
469 spin_lock_irqsave(&card->ipm_lock, flags);
470 }
471 kfree(ipm);
472 }
473 spin_unlock_irqrestore(&card->ipm_lock, flags);
474#endif
475}
476/**
477 * Cleanup channels,card and state machines.
478 */
479static void
480lcs_cleanup_card(struct lcs_card *card)
481{
482
483 LCS_DBF_TEXT(3, setup, "cleancrd");
484 LCS_DBF_HEX(2,setup,&card,sizeof(void*));
485
486 if (card->dev != NULL)
487 free_netdev(card->dev);
488 /* Cleanup channels. */
489 lcs_cleanup_channel(&card->write);
490 lcs_cleanup_channel(&card->read);
491}
492
493/**
494 * Start channel.
495 */
496static int
497lcs_start_channel(struct lcs_channel *channel)
498{
499 unsigned long flags;
500 int rc;
501
2a0217d5 502 LCS_DBF_TEXT_(4, trace,"ssch%s", dev_name(&channel->ccwdev->dev));
1da177e4
LT		 503 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
504 rc = ccw_device_start(channel->ccwdev,
505 channel->ccws + channel->io_idx, 0, 0,
506 DOIO_DENY_PREFETCH | DOIO_ALLOW_SUSPEND);
507 if (rc == 0)
9163bb2e 508 channel->state = LCS_CH_STATE_RUNNING;
1da177e4
LT		 509 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
510 if (rc) {
2a0217d5
KS		 511 LCS_DBF_TEXT_(4,trace,"essh%s",
512 dev_name(&channel->ccwdev->dev));
c99fc5da
KW		 513 dev_err(&channel->ccwdev->dev,
514 "Starting an LCS device resulted in an error,"
515 " rc=%d!\n", rc);
1da177e4
LT		 516 }
517 return rc;
518}
519
520static int
521lcs_clear_channel(struct lcs_channel *channel)
522{
523 unsigned long flags;
524 int rc;
525
526 LCS_DBF_TEXT(4,trace,"clearch");
2a0217d5 527 LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev));
1da177e4
LT		 528 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
529 rc = ccw_device_clear(channel->ccwdev, (addr_t) channel);
530 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
531 if (rc) {
2a0217d5
KS		 532 LCS_DBF_TEXT_(4, trace, "ecsc%s",
533 dev_name(&channel->ccwdev->dev));
1da177e4
LT		 534 return rc;
535 }
9163bb2e
UB		 536 wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_CLEARED));
537 channel->state = LCS_CH_STATE_STOPPED;
1da177e4
LT		 538 return rc;
539}
540
541
542/**
543 * Stop channel.
544 */
545static int
546lcs_stop_channel(struct lcs_channel *channel)
547{
548 unsigned long flags;
549 int rc;
550
9163bb2e 551 if (channel->state == LCS_CH_STATE_STOPPED)
1da177e4
LT		 552 return 0;
553 LCS_DBF_TEXT(4,trace,"haltsch");
2a0217d5 554 LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev));
9163bb2e 555 channel->state = LCS_CH_STATE_INIT;
1da177e4
LT		 556 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
557 rc = ccw_device_halt(channel->ccwdev, (addr_t) channel);
558 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
559 if (rc) {
2a0217d5
KS		 560 LCS_DBF_TEXT_(4, trace, "ehsc%s",
561 dev_name(&channel->ccwdev->dev));
1da177e4
LT		 562 return rc;
563 }
564 /* Asynchronous halt initialted. Wait for its completion. */
9163bb2e 565 wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_HALTED));
1da177e4
LT		 566 lcs_clear_channel(channel);
567 return 0;
568}
569
570/**
571 * start read and write channel
572 */
573static int
574lcs_start_channels(struct lcs_card *card)
575{
576 int rc;
577
578 LCS_DBF_TEXT(2, trace, "chstart");
579 /* start read channel */
580 rc = lcs_start_channel(&card->read);
581 if (rc)
582 return rc;
583 /* start write channel */
584 rc = lcs_start_channel(&card->write);
585 if (rc)
586 lcs_stop_channel(&card->read);
587 return rc;
588}
589
590/**
591 * stop read and write channel
592 */
593static int
594lcs_stop_channels(struct lcs_card *card)
595{
596 LCS_DBF_TEXT(2, trace, "chhalt");
597 lcs_stop_channel(&card->read);
598 lcs_stop_channel(&card->write);
599 return 0;
600}
601
602/**
603 * Get empty buffer.
604 */
605static struct lcs_buffer *
606__lcs_get_buffer(struct lcs_channel *channel)
607{
608 int index;
609
610 LCS_DBF_TEXT(5, trace, "_getbuff");
611 index = channel->io_idx;
612 do {
9163bb2e
UB		 613 if (channel->iob[index].state == LCS_BUF_STATE_EMPTY) {
614 channel->iob[index].state = LCS_BUF_STATE_LOCKED;
1da177e4
LT		 615 return channel->iob + index;
616 }
617 index = (index + 1) & (LCS_NUM_BUFFS - 1);
618 } while (index != channel->io_idx);
619 return NULL;
620}
621
622static struct lcs_buffer *
623lcs_get_buffer(struct lcs_channel *channel)
624{
625 struct lcs_buffer *buffer;
626 unsigned long flags;
627
628 LCS_DBF_TEXT(5, trace, "getbuff");
629 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
630 buffer = __lcs_get_buffer(channel);
631 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
632 return buffer;
633}
634
635/**
636 * Resume channel program if the channel is suspended.
637 */
638static int
639__lcs_resume_channel(struct lcs_channel *channel)
640{
641 int rc;
642
9163bb2e 643 if (channel->state != LCS_CH_STATE_SUSPENDED)
1da177e4
LT		 644 return 0;
645 if (channel->ccws[channel->io_idx].flags & CCW_FLAG_SUSPEND)
646 return 0;
2a0217d5 647 LCS_DBF_TEXT_(5, trace, "rsch%s", dev_name(&channel->ccwdev->dev));
1da177e4
LT		 648 rc = ccw_device_resume(channel->ccwdev);
649 if (rc) {
2a0217d5
KS		 650 LCS_DBF_TEXT_(4, trace, "ersc%s",
651 dev_name(&channel->ccwdev->dev));
c99fc5da
KW		 652 dev_err(&channel->ccwdev->dev,
653 "Sending data from the LCS device to the LAN failed"
654 " with rc=%d\n",rc);
1da177e4 655 } else
9163bb2e 656 channel->state = LCS_CH_STATE_RUNNING;
1da177e4
LT		 657 return rc;
658
659}
660
661/**
662 * Make a buffer ready for processing.
663 */
664static inline void
665__lcs_ready_buffer_bits(struct lcs_channel *channel, int index)
666{
667 int prev, next;
668
669 LCS_DBF_TEXT(5, trace, "rdybits");
670 prev = (index - 1) & (LCS_NUM_BUFFS - 1);
671 next = (index + 1) & (LCS_NUM_BUFFS - 1);
672 /* Check if we may clear the suspend bit of this buffer. */
673 if (channel->ccws[next].flags & CCW_FLAG_SUSPEND) {
674 /* Check if we have to set the PCI bit. */
675 if (!(channel->ccws[prev].flags & CCW_FLAG_SUSPEND))
676 /* Suspend bit of the previous buffer is not set. */
677 channel->ccws[index].flags |= CCW_FLAG_PCI;
678 /* Suspend bit of the next buffer is set. */
679 channel->ccws[index].flags &= ~CCW_FLAG_SUSPEND;
680 }
681}
682
683static int
684lcs_ready_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
685{
686 unsigned long flags;
687 int index, rc;
688
689 LCS_DBF_TEXT(5, trace, "rdybuff");
9163bb2e
UB		 690 BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED &&
691 buffer->state != LCS_BUF_STATE_PROCESSED);
1da177e4 692 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
9163bb2e 693 buffer->state = LCS_BUF_STATE_READY;
1da177e4
LT		 694 index = buffer - channel->iob;
695 /* Set length. */
696 channel->ccws[index].count = buffer->count;
697 /* Check relevant PCI/suspend bits. */
698 __lcs_ready_buffer_bits(channel, index);
699 rc = __lcs_resume_channel(channel);
700 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
701 return rc;
702}
703
704/**
705 * Mark the buffer as processed. Take care of the suspend bit
706 * of the previous buffer. This function is called from
707 * interrupt context, so the lock must not be taken.
708 */
709static int
710__lcs_processed_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
711{
712 int index, prev, next;
713
714 LCS_DBF_TEXT(5, trace, "prcsbuff");
9163bb2e
UB		 715 BUG_ON(buffer->state != LCS_BUF_STATE_READY);
716 buffer->state = LCS_BUF_STATE_PROCESSED;
1da177e4
LT		 717 index = buffer - channel->iob;
718 prev = (index - 1) & (LCS_NUM_BUFFS - 1);
719 next = (index + 1) & (LCS_NUM_BUFFS - 1);
720 /* Set the suspend bit and clear the PCI bit of this buffer. */
721 channel->ccws[index].flags |= CCW_FLAG_SUSPEND;
722 channel->ccws[index].flags &= ~CCW_FLAG_PCI;
723 /* Check the suspend bit of the previous buffer. */
9163bb2e 724 if (channel->iob[prev].state == LCS_BUF_STATE_READY) {
1da177e4
LT		 725 /*
726 * Previous buffer is in state ready. It might have
727 * happened in lcs_ready_buffer that the suspend bit
728 * has not been cleared to avoid an endless loop.
729 * Do it now.
730 */
731 __lcs_ready_buffer_bits(channel, prev);
732 }
733 /* Clear PCI bit of next buffer. */
734 channel->ccws[next].flags &= ~CCW_FLAG_PCI;
735 return __lcs_resume_channel(channel);
736}
737
738/**
739 * Put a processed buffer back to state empty.
740 */
741static void
742lcs_release_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
743{
744 unsigned long flags;
745
746 LCS_DBF_TEXT(5, trace, "relbuff");
9163bb2e
UB		 747 BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED &&
748 buffer->state != LCS_BUF_STATE_PROCESSED);
1da177e4 749 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
9163bb2e 750 buffer->state = LCS_BUF_STATE_EMPTY;
1da177e4
LT		 751 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
752}
753
754/**
755 * Get buffer for a lan command.
756 */
757static struct lcs_buffer *
758lcs_get_lancmd(struct lcs_card *card, int count)
759{
760 struct lcs_buffer *buffer;
761 struct lcs_cmd *cmd;
762
763 LCS_DBF_TEXT(4, trace, "getlncmd");
764 /* Get buffer and wait if none is available. */
765 wait_event(card->write.wait_q,
766 ((buffer = lcs_get_buffer(&card->write)) != NULL));
767 count += sizeof(struct lcs_header);
768 *(__u16 *)(buffer->data + count) = 0;
769 buffer->count = count + sizeof(__u16);
770 buffer->callback = lcs_release_buffer;
771 cmd = (struct lcs_cmd *) buffer->data;
772 cmd->offset = count;
773 cmd->type = LCS_FRAME_TYPE_CONTROL;
774 cmd->slot = 0;
775 return buffer;
776}
777
778
779static void
780lcs_get_reply(struct lcs_reply *reply)
781{
782 WARN_ON(atomic_read(&reply->refcnt) <= 0);
783 atomic_inc(&reply->refcnt);
784}
785
786static void
787lcs_put_reply(struct lcs_reply *reply)
788{
789 WARN_ON(atomic_read(&reply->refcnt) <= 0);
790 if (atomic_dec_and_test(&reply->refcnt)) {
791 kfree(reply);
792 }
793
794}
795
796static struct lcs_reply *
797lcs_alloc_reply(struct lcs_cmd *cmd)
798{
799 struct lcs_reply *reply;
800
801 LCS_DBF_TEXT(4, trace, "getreply");
802
88abaab4 803 reply = kzalloc(sizeof(struct lcs_reply), GFP_ATOMIC);
1da177e4
LT		 804 if (!reply)
805 return NULL;
1da177e4
LT		 806 atomic_set(&reply->refcnt,1);
807 reply->sequence_no = cmd->sequence_no;
808 reply->received = 0;
809 reply->rc = 0;
810 init_waitqueue_head(&reply->wait_q);
811
812 return reply;
813}
814
815/**
816 * Notifier function for lancmd replies. Called from read irq.
817 */
818static void
819lcs_notify_lancmd_waiters(struct lcs_card *card, struct lcs_cmd *cmd)
820{
821 struct list_head *l, *n;
822 struct lcs_reply *reply;
823
824 LCS_DBF_TEXT(4, trace, "notiwait");
825 spin_lock(&card->lock);
826 list_for_each_safe(l, n, &card->lancmd_waiters) {
827 reply = list_entry(l, struct lcs_reply, list);
828 if (reply->sequence_no == cmd->sequence_no) {
829 lcs_get_reply(reply);
830 list_del_init(&reply->list);
831 if (reply->callback != NULL)
832 reply->callback(card, cmd);
833 reply->received = 1;
834 reply->rc = cmd->return_code;
835 wake_up(&reply->wait_q);
836 lcs_put_reply(reply);
837 break;
838 }
839 }
840 spin_unlock(&card->lock);
841}
842
843/**
b595076a 844 * Emit buffer of a lan command.
1da177e4 845 */
2b67fc46 846static void
1da177e4
LT		 847lcs_lancmd_timeout(unsigned long data)
848{
849 struct lcs_reply *reply, *list_reply, *r;
850 unsigned long flags;
851
852 LCS_DBF_TEXT(4, trace, "timeout");
853 reply = (struct lcs_reply *) data;
854 spin_lock_irqsave(&reply->card->lock, flags);
855 list_for_each_entry_safe(list_reply, r,
856 &reply->card->lancmd_waiters,list) {
857 if (reply == list_reply) {
858 lcs_get_reply(reply);
859 list_del_init(&reply->list);
860 spin_unlock_irqrestore(&reply->card->lock, flags);
861 reply->received = 1;
862 reply->rc = -ETIME;
863 wake_up(&reply->wait_q);
864 lcs_put_reply(reply);
865 return;
866 }
867 }
868 spin_unlock_irqrestore(&reply->card->lock, flags);
869}
870
871static int
872lcs_send_lancmd(struct lcs_card *card, struct lcs_buffer *buffer,
873 void (*reply_callback)(struct lcs_card *, struct lcs_cmd *))
874{
875 struct lcs_reply *reply;
876 struct lcs_cmd *cmd;
877 struct timer_list timer;
878 unsigned long flags;
879 int rc;
880
881 LCS_DBF_TEXT(4, trace, "sendcmd");
882 cmd = (struct lcs_cmd *) buffer->data;
883 cmd->return_code = 0;
884 cmd->sequence_no = card->sequence_no++;
885 reply = lcs_alloc_reply(cmd);
886 if (!reply)
887 return -ENOMEM;
888 reply->callback = reply_callback;
889 reply->card = card;
890 spin_lock_irqsave(&card->lock, flags);
891 list_add_tail(&reply->list, &card->lancmd_waiters);
892 spin_unlock_irqrestore(&card->lock, flags);
893
894 buffer->callback = lcs_release_buffer;
895 rc = lcs_ready_buffer(&card->write, buffer);
896 if (rc)
897 return rc;
d62e09e3 898 init_timer_on_stack(&timer);
1da177e4
LT		 899 timer.function = lcs_lancmd_timeout;
900 timer.data = (unsigned long) reply;
901 timer.expires = jiffies + HZ*card->lancmd_timeout;
902 add_timer(&timer);
903 wait_event(reply->wait_q, reply->received);
904 del_timer_sync(&timer);
905 LCS_DBF_TEXT_(4, trace, "rc:%d",reply->rc);
906 rc = reply->rc;
907 lcs_put_reply(reply);
908 return rc ? -EIO : 0;
909}
910
911/**
912 * LCS startup command
913 */
914static int
915lcs_send_startup(struct lcs_card *card, __u8 initiator)
916{
917 struct lcs_buffer *buffer;
918 struct lcs_cmd *cmd;
919
920 LCS_DBF_TEXT(2, trace, "startup");
921 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
922 cmd = (struct lcs_cmd *) buffer->data;
923 cmd->cmd_code = LCS_CMD_STARTUP;
924 cmd->initiator = initiator;
925 cmd->cmd.lcs_startup.buff_size = LCS_IOBUFFERSIZE;
926 return lcs_send_lancmd(card, buffer, NULL);
927}
928
929/**
930 * LCS shutdown command
931 */
932static int
933lcs_send_shutdown(struct lcs_card *card)
934{
935 struct lcs_buffer *buffer;
936 struct lcs_cmd *cmd;
937
938 LCS_DBF_TEXT(2, trace, "shutdown");
939 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
940 cmd = (struct lcs_cmd *) buffer->data;
941 cmd->cmd_code = LCS_CMD_SHUTDOWN;
942 cmd->initiator = LCS_INITIATOR_TCPIP;
943 return lcs_send_lancmd(card, buffer, NULL);
944}
945
946/**
947 * LCS lanstat command
948 */
949static void
950__lcs_lanstat_cb(struct lcs_card *card, struct lcs_cmd *cmd)
951{
952 LCS_DBF_TEXT(2, trace, "statcb");
953 memcpy(card->mac, cmd->cmd.lcs_lanstat_cmd.mac_addr, LCS_MAC_LENGTH);
954}
955
956static int
957lcs_send_lanstat(struct lcs_card *card)
958{
959 struct lcs_buffer *buffer;
960 struct lcs_cmd *cmd;
961
962 LCS_DBF_TEXT(2,trace, "cmdstat");
963 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
964 cmd = (struct lcs_cmd *) buffer->data;
965 /* Setup lanstat command. */
966 cmd->cmd_code = LCS_CMD_LANSTAT;
967 cmd->initiator = LCS_INITIATOR_TCPIP;
968 cmd->cmd.lcs_std_cmd.lan_type = card->lan_type;
969 cmd->cmd.lcs_std_cmd.portno = card->portno;
970 return lcs_send_lancmd(card, buffer, __lcs_lanstat_cb);
971}
972
973/**
974 * send stoplan command
975 */
976static int
977lcs_send_stoplan(struct lcs_card *card, __u8 initiator)
978{
979 struct lcs_buffer *buffer;
980 struct lcs_cmd *cmd;
981
982 LCS_DBF_TEXT(2, trace, "cmdstpln");
983 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
984 cmd = (struct lcs_cmd *) buffer->data;
985 cmd->cmd_code = LCS_CMD_STOPLAN;
986 cmd->initiator = initiator;
987 cmd->cmd.lcs_std_cmd.lan_type = card->lan_type;
988 cmd->cmd.lcs_std_cmd.portno = card->portno;
989 return lcs_send_lancmd(card, buffer, NULL);
990}
991
992/**
993 * send startlan command
994 */
995static void
996__lcs_send_startlan_cb(struct lcs_card *card, struct lcs_cmd *cmd)
997{
998 LCS_DBF_TEXT(2, trace, "srtlancb");
999 card->lan_type = cmd->cmd.lcs_std_cmd.lan_type;
1000 card->portno = cmd->cmd.lcs_std_cmd.portno;
1001}
1002
1003static int
1004lcs_send_startlan(struct lcs_card *card, __u8 initiator)
1005{
1006 struct lcs_buffer *buffer;
1007 struct lcs_cmd *cmd;
1008
1009 LCS_DBF_TEXT(2, trace, "cmdstaln");
1010 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
1011 cmd = (struct lcs_cmd *) buffer->data;
1012 cmd->cmd_code = LCS_CMD_STARTLAN;
1013 cmd->initiator = initiator;
1014 cmd->cmd.lcs_std_cmd.lan_type = card->lan_type;
1015 cmd->cmd.lcs_std_cmd.portno = card->portno;
1016 return lcs_send_lancmd(card, buffer, __lcs_send_startlan_cb);
1017}
1018
1019#ifdef CONFIG_IP_MULTICAST
1020/**
1021 * send setipm command (Multicast)
1022 */
1023static int
1024lcs_send_setipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list)
1025{
1026 struct lcs_buffer *buffer;
1027 struct lcs_cmd *cmd;
1028
1029 LCS_DBF_TEXT(2, trace, "cmdsetim");
1030 buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE);
1031 cmd = (struct lcs_cmd *) buffer->data;
1032 cmd->cmd_code = LCS_CMD_SETIPM;
1033 cmd->initiator = LCS_INITIATOR_TCPIP;
1034 cmd->cmd.lcs_qipassist.lan_type = card->lan_type;
1035 cmd->cmd.lcs_qipassist.portno = card->portno;
1036 cmd->cmd.lcs_qipassist.version = 4;
1037 cmd->cmd.lcs_qipassist.num_ip_pairs = 1;
1038 memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair,
1039 &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair));
1040 LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr);
1041 return lcs_send_lancmd(card, buffer, NULL);
1042}
1043
1044/**
1045 * send delipm command (Multicast)
1046 */
1047static int
1048lcs_send_delipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list)
1049{
1050 struct lcs_buffer *buffer;
1051 struct lcs_cmd *cmd;
1052
1053 LCS_DBF_TEXT(2, trace, "cmddelim");
1054 buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE);
1055 cmd = (struct lcs_cmd *) buffer->data;
1056 cmd->cmd_code = LCS_CMD_DELIPM;
1057 cmd->initiator = LCS_INITIATOR_TCPIP;
1058 cmd->cmd.lcs_qipassist.lan_type = card->lan_type;
1059 cmd->cmd.lcs_qipassist.portno = card->portno;
1060 cmd->cmd.lcs_qipassist.version = 4;
1061 cmd->cmd.lcs_qipassist.num_ip_pairs = 1;
1062 memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair,
1063 &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair));
1064 LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr);
1065 return lcs_send_lancmd(card, buffer, NULL);
1066}
1067
1068/**
1069 * check if multicast is supported by LCS
1070 */
1071static void
1072__lcs_check_multicast_cb(struct lcs_card *card, struct lcs_cmd *cmd)
1073{
1074 LCS_DBF_TEXT(2, trace, "chkmccb");
1075 card->ip_assists_supported =
1076 cmd->cmd.lcs_qipassist.ip_assists_supported;
1077 card->ip_assists_enabled =
1078 cmd->cmd.lcs_qipassist.ip_assists_enabled;
1079}
1080
1081static int
1082lcs_check_multicast_support(struct lcs_card *card)
1083{
1084 struct lcs_buffer *buffer;
1085 struct lcs_cmd *cmd;
1086 int rc;
1087
1088 LCS_DBF_TEXT(2, trace, "cmdqipa");
1089 /* Send query ipassist. */
1090 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
1091 cmd = (struct lcs_cmd *) buffer->data;
1092 cmd->cmd_code = LCS_CMD_QIPASSIST;
1093 cmd->initiator = LCS_INITIATOR_TCPIP;
1094 cmd->cmd.lcs_qipassist.lan_type = card->lan_type;
1095 cmd->cmd.lcs_qipassist.portno = card->portno;
1096 cmd->cmd.lcs_qipassist.version = 4;
1097 cmd->cmd.lcs_qipassist.num_ip_pairs = 1;
1098 rc = lcs_send_lancmd(card, buffer, __lcs_check_multicast_cb);
1099 if (rc != 0) {
c99fc5da 1100 pr_err("Query IPAssist failed. Assuming unsupported!\n");
1da177e4
LT		 1101 return -EOPNOTSUPP;
1102 }
1da177e4
LT		 1103 if (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT)
1104 return 0;
1105 return -EOPNOTSUPP;
1106}
1107
1108/**
1109 * set or del multicast address on LCS card
1110 */
1111static void
1112lcs_fix_multicast_list(struct lcs_card *card)
1113{
1114 struct list_head failed_list;
1115 struct lcs_ipm_list *ipm, *tmp;
1116 unsigned long flags;
1117 int rc;
1118
1119 LCS_DBF_TEXT(4,trace, "fixipm");
1120 INIT_LIST_HEAD(&failed_list);
1121 spin_lock_irqsave(&card->ipm_lock, flags);
1122list_modified:
1123 list_for_each_entry_safe(ipm, tmp, &card->ipm_list, list){
1124 switch (ipm->ipm_state) {
1125 case LCS_IPM_STATE_SET_REQUIRED:
25985edc 1126 /* del from ipm_list so no one else can tamper with
1da177e4
LT		 1127 * this entry */
1128 list_del_init(&ipm->list);
1129 spin_unlock_irqrestore(&card->ipm_lock, flags);
1130 rc = lcs_send_setipm(card, ipm);
1131 spin_lock_irqsave(&card->ipm_lock, flags);
1132 if (rc) {
c99fc5da
KW		 1133 pr_info("Adding multicast address failed."
1134 " Table possibly full!\n");
1da177e4
LT		 1135 /* store ipm in failed list -> will be added
1136 * to ipm_list again, so a retry will be done
1137 * during the next call of this function */
1138 list_add_tail(&ipm->list, &failed_list);
1139 } else {
1140 ipm->ipm_state = LCS_IPM_STATE_ON_CARD;
1141 /* re-insert into ipm_list */
1142 list_add_tail(&ipm->list, &card->ipm_list);
1143 }
1144 goto list_modified;
1145 case LCS_IPM_STATE_DEL_REQUIRED:
1146 list_del(&ipm->list);
1147 spin_unlock_irqrestore(&card->ipm_lock, flags);
1148 lcs_send_delipm(card, ipm);
1149 spin_lock_irqsave(&card->ipm_lock, flags);
1150 kfree(ipm);
1151 goto list_modified;
1152 case LCS_IPM_STATE_ON_CARD:
1153 break;
1154 }
1155 }
1156 /* re-insert all entries from the failed_list into ipm_list */
179e0917
AM		 1157 list_for_each_entry_safe(ipm, tmp, &failed_list, list)
1158 list_move_tail(&ipm->list, &card->ipm_list);
1159
1da177e4 1160 spin_unlock_irqrestore(&card->ipm_lock, flags);
1da177e4
LT		 1161}
1162
1163/**
1164 * get mac address for the relevant Multicast address
1165 */
1166static void
5a5a852e 1167lcs_get_mac_for_ipm(__be32 ipm, char *mac, struct net_device *dev)
1da177e4
LT		 1168{
1169 LCS_DBF_TEXT(4,trace, "getmac");
1170 if (dev->type == ARPHRD_IEEE802_TR)
1171 ip_tr_mc_map(ipm, mac);
1172 else
1173 ip_eth_mc_map(ipm, mac);
1174}
1175
1176/**
1177 * function called by net device to handle multicast address relevant things
1178 */
1179static inline void
1180lcs_remove_mc_addresses(struct lcs_card *card, struct in_device *in4_dev)
1181{
1182 struct ip_mc_list *im4;
1183 struct list_head *l;
1184 struct lcs_ipm_list *ipm;
1185 unsigned long flags;
1186 char buf[MAX_ADDR_LEN];
1187
1188 LCS_DBF_TEXT(4, trace, "remmclst");
1189 spin_lock_irqsave(&card->ipm_lock, flags);
1190 list_for_each(l, &card->ipm_list) {
1191 ipm = list_entry(l, struct lcs_ipm_list, list);
f3aa3136
SS		 1192 for (im4 = rcu_dereference(in4_dev->mc_list);
1193 im4 != NULL; im4 = rcu_dereference(im4->next_rcu)) {
1da177e4
LT		 1194 lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev);
1195 if ( (ipm->ipm.ip_addr == im4->multiaddr) &&
1196 (memcmp(buf, &ipm->ipm.mac_addr,
1197 LCS_MAC_LENGTH) == 0) )
1198 break;
1199 }
1200 if (im4 == NULL)
1201 ipm->ipm_state = LCS_IPM_STATE_DEL_REQUIRED;
1202 }
1203 spin_unlock_irqrestore(&card->ipm_lock, flags);
1204}
1205
1206static inline struct lcs_ipm_list *
1207lcs_check_addr_entry(struct lcs_card *card, struct ip_mc_list *im4, char *buf)
1208{
1209 struct lcs_ipm_list *tmp, *ipm = NULL;
1210 struct list_head *l;
1211 unsigned long flags;
1212
1213 LCS_DBF_TEXT(4, trace, "chkmcent");
1214 spin_lock_irqsave(&card->ipm_lock, flags);
1215 list_for_each(l, &card->ipm_list) {
1216 tmp = list_entry(l, struct lcs_ipm_list, list);
1217 if ( (tmp->ipm.ip_addr == im4->multiaddr) &&
1218 (memcmp(buf, &tmp->ipm.mac_addr,
1219 LCS_MAC_LENGTH) == 0) ) {
1220 ipm = tmp;
1221 break;
1222 }
1223 }
1224 spin_unlock_irqrestore(&card->ipm_lock, flags);
1225 return ipm;
1226}
1227
1228static inline void
1229lcs_set_mc_addresses(struct lcs_card *card, struct in_device *in4_dev)
1230{
1231
1232 struct ip_mc_list *im4;
1233 struct lcs_ipm_list *ipm;
1234 char buf[MAX_ADDR_LEN];
1235 unsigned long flags;
1236
1237 LCS_DBF_TEXT(4, trace, "setmclst");
f3aa3136
SS		 1238 for (im4 = rcu_dereference(in4_dev->mc_list); im4 != NULL;
1239 im4 = rcu_dereference(im4->next_rcu)) {
1da177e4
LT		 1240 lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev);
1241 ipm = lcs_check_addr_entry(card, im4, buf);
1242 if (ipm != NULL)
1243 continue; /* Address already in list. */
ae57b20a 1244 ipm = kzalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC);
1da177e4 1245 if (ipm == NULL) {
c99fc5da
KW		 1246 pr_info("Not enough memory to add"
1247 " new multicast entry!\n");
1da177e4
LT		 1248 break;
1249 }
1da177e4
LT		 1250 memcpy(&ipm->ipm.mac_addr, buf, LCS_MAC_LENGTH);
1251 ipm->ipm.ip_addr = im4->multiaddr;
1252 ipm->ipm_state = LCS_IPM_STATE_SET_REQUIRED;
1253 spin_lock_irqsave(&card->ipm_lock, flags);
27eb5ac8 1254 LCS_DBF_HEX(2,trace,&ipm->ipm.ip_addr,4);
1da177e4
LT		 1255 list_add(&ipm->list, &card->ipm_list);
1256 spin_unlock_irqrestore(&card->ipm_lock, flags);
1257 }
1258}
1259
1260static int
1261lcs_register_mc_addresses(void *data)
1262{
1263 struct lcs_card *card;
1264 struct in_device *in4_dev;
1265
1266 card = (struct lcs_card *) data;
1da177e4
LT		 1267
1268 if (!lcs_do_run_thread(card, LCS_SET_MC_THREAD))
1269 return 0;
1270 LCS_DBF_TEXT(4, trace, "regmulti");
1271
1272 in4_dev = in_dev_get(card->dev);
1273 if (in4_dev == NULL)
1274 goto out;
f3aa3136 1275 rcu_read_lock();
1da177e4
LT		 1276 lcs_remove_mc_addresses(card,in4_dev);
1277 lcs_set_mc_addresses(card, in4_dev);
f3aa3136 1278 rcu_read_unlock();
1da177e4
LT		 1279 in_dev_put(in4_dev);
1280
27eb5ac8
KW		 1281 netif_carrier_off(card->dev);
1282 netif_tx_disable(card->dev);
1283 wait_event(card->write.wait_q,
9163bb2e 1284 (card->write.state != LCS_CH_STATE_RUNNING));
1da177e4 1285 lcs_fix_multicast_list(card);
27eb5ac8
KW		 1286 if (card->state == DEV_STATE_UP) {
1287 netif_carrier_on(card->dev);
1288 netif_wake_queue(card->dev);
1289 }
1da177e4
LT		 1290out:
1291 lcs_clear_thread_running_bit(card, LCS_SET_MC_THREAD);
1292 return 0;
1293}
801599b0
HC		 1294#endif /* CONFIG_IP_MULTICAST */
1295
1da177e4
LT		 1296/**
1297 * function called by net device to
1298 * handle multicast address relevant things
1299 */
1300static void
1301lcs_set_multicast_list(struct net_device *dev)
1302{
801599b0 1303#ifdef CONFIG_IP_MULTICAST
1da177e4
LT		 1304 struct lcs_card *card;
1305
1306 LCS_DBF_TEXT(4, trace, "setmulti");
ad660e2f 1307 card = (struct lcs_card *) dev->ml_priv;
1da177e4 1308
e82b0f2c 1309 if (!lcs_set_thread_start_bit(card, LCS_SET_MC_THREAD))
1da177e4 1310 schedule_work(&card->kernel_thread_starter);
1da177e4 1311#endif /* CONFIG_IP_MULTICAST */
801599b0 1312}
1da177e4
LT		 1313
1314static long
1315lcs_check_irb_error(struct ccw_device *cdev, struct irb *irb)
1316{
1317 if (!IS_ERR(irb))
1318 return 0;
1319
1320 switch (PTR_ERR(irb)) {
1321 case -EIO:
c99fc5da
KW		 1322 dev_warn(&cdev->dev,
1323 "An I/O-error occurred on the LCS device\n");
1da177e4
LT		 1324 LCS_DBF_TEXT(2, trace, "ckirberr");
1325 LCS_DBF_TEXT_(2, trace, " rc%d", -EIO);
1326 break;
1327 case -ETIMEDOUT:
c99fc5da
KW		 1328 dev_warn(&cdev->dev,
1329 "A command timed out on the LCS device\n");
1da177e4
LT		 1330 LCS_DBF_TEXT(2, trace, "ckirberr");
1331 LCS_DBF_TEXT_(2, trace, " rc%d", -ETIMEDOUT);
1332 break;
1333 default:
c99fc5da
KW		 1334 dev_warn(&cdev->dev,
1335 "An error occurred on the LCS device, rc=%ld\n",
1336 PTR_ERR(irb));
1da177e4
LT		 1337 LCS_DBF_TEXT(2, trace, "ckirberr");
1338 LCS_DBF_TEXT(2, trace, " rc???");
1339 }
1340 return PTR_ERR(irb);
1341}
1342
27eb5ac8
KW		 1343static int
1344lcs_get_problem(struct ccw_device *cdev, struct irb *irb)
1345{
1346 int dstat, cstat;
1347 char *sense;
1348
1349 sense = (char *) irb->ecw;
23d805b6
PO		 1350 cstat = irb->scsw.cmd.cstat;
1351 dstat = irb->scsw.cmd.dstat;
27eb5ac8
KW		 1352
1353 if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1354 SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1355 SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1356 LCS_DBF_TEXT(2, trace, "CGENCHK");
1357 return 1;
1358 }
1359 if (dstat & DEV_STAT_UNIT_CHECK) {
1360 if (sense[LCS_SENSE_BYTE_1] &
1361 LCS_SENSE_RESETTING_EVENT) {
1362 LCS_DBF_TEXT(2, trace, "REVIND");
1363 return 1;
1364 }
1365 if (sense[LCS_SENSE_BYTE_0] &
1366 LCS_SENSE_CMD_REJECT) {
1367 LCS_DBF_TEXT(2, trace, "CMDREJ");
1368 return 0;
1369 }
1370 if ((!sense[LCS_SENSE_BYTE_0]) &&
1371 (!sense[LCS_SENSE_BYTE_1]) &&
1372 (!sense[LCS_SENSE_BYTE_2]) &&
1373 (!sense[LCS_SENSE_BYTE_3])) {
1374 LCS_DBF_TEXT(2, trace, "ZEROSEN");
1375 return 0;
1376 }
1377 LCS_DBF_TEXT(2, trace, "DGENCHK");
1378 return 1;
1379 }
1380 return 0;
1381}
1382
2b67fc46 1383static void
27eb5ac8
KW		 1384lcs_schedule_recovery(struct lcs_card *card)
1385{
1386 LCS_DBF_TEXT(2, trace, "startrec");
1387 if (!lcs_set_thread_start_bit(card, LCS_RECOVERY_THREAD))
1388 schedule_work(&card->kernel_thread_starter);
1389}
1da177e4
LT		 1390
1391/**
1392 * IRQ Handler for LCS channels
1393 */
1394static void
1395lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
1396{
1397 struct lcs_card *card;
1398 struct lcs_channel *channel;
27eb5ac8
KW		 1399 int rc, index;
1400 int cstat, dstat;
1da177e4 1401
096a6168 1402 kstat_cpu(smp_processor_id()).irqs[IOINT_LCS]++;
1da177e4
LT		 1403 if (lcs_check_irb_error(cdev, irb))
1404 return;
1405
1406 card = CARD_FROM_DEV(cdev);
1407 if (card->read.ccwdev == cdev)
1408 channel = &card->read;
1409 else
1410 channel = &card->write;
1411
23d805b6
PO		 1412 cstat = irb->scsw.cmd.cstat;
1413 dstat = irb->scsw.cmd.dstat;
2a0217d5 1414 LCS_DBF_TEXT_(5, trace, "Rint%s", dev_name(&cdev->dev));
23d805b6
PO		 1415 LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.cstat,
1416 irb->scsw.cmd.dstat);
1417 LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.fctl,
1418 irb->scsw.cmd.actl);
1da177e4 1419
27eb5ac8
KW		 1420 /* Check for channel and device errors presented */
1421 rc = lcs_get_problem(cdev, irb);
1422 if (rc || (dstat & DEV_STAT_UNIT_EXCEP)) {
c99fc5da
KW		 1423 dev_warn(&cdev->dev,
1424 "The LCS device stopped because of an error,"
1425 " dstat=0x%X, cstat=0x%X \n",
1426 dstat, cstat);
27eb5ac8 1427 if (rc) {
59579da3 1428 channel->state = LCS_CH_STATE_ERROR;
27eb5ac8
KW		 1429 }
1430 }
59579da3
KW		 1431 if (channel->state == LCS_CH_STATE_ERROR) {
1432 lcs_schedule_recovery(card);
1433 wake_up(&card->wait_q);
1434 return;
1435 }
1da177e4 1436 /* How far in the ccw chain have we processed? */
9163bb2e 1437 if ((channel->state != LCS_CH_STATE_INIT) &&
9b3b9ab6
KW		 1438 (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) &&
1439 (irb->scsw.cmd.cpa != 0)) {
23d805b6 1440 index = (struct ccw1 *) __va((addr_t) irb->scsw.cmd.cpa)
1da177e4 1441 - channel->ccws;
23d805b6
PO		 1442 if ((irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) ||
1443 (irb->scsw.cmd.cstat & SCHN_STAT_PCI))
1da177e4
LT		 1444 /* Bloody io subsystem tells us lies about cpa... */
1445 index = (index - 1) & (LCS_NUM_BUFFS - 1);
1446 while (channel->io_idx != index) {
1447 __lcs_processed_buffer(channel,
1448 channel->iob + channel->io_idx);
1449 channel->io_idx =
1450 (channel->io_idx + 1) & (LCS_NUM_BUFFS - 1);
1451 }
1452 }
1453
23d805b6
PO		 1454 if ((irb->scsw.cmd.dstat & DEV_STAT_DEV_END) ||
1455 (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) ||
1456 (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK))
1da177e4 1457 /* Mark channel as stopped. */
9163bb2e 1458 channel->state = LCS_CH_STATE_STOPPED;
23d805b6 1459 else if (irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED)
1da177e4 1460 /* CCW execution stopped on a suspend bit. */
9163bb2e 1461 channel->state = LCS_CH_STATE_SUSPENDED;
23d805b6
PO		 1462 if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1463 if (irb->scsw.cmd.cc != 0) {
1da177e4
LT		 1464 ccw_device_halt(channel->ccwdev, (addr_t) channel);
1465 return;
1466 }
1467 /* The channel has been stopped by halt_IO. */
9163bb2e 1468 channel->state = LCS_CH_STATE_HALTED;
1da177e4 1469 }
23d805b6 1470 if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC)
9163bb2e 1471 channel->state = LCS_CH_STATE_CLEARED;
1da177e4
LT		 1472 /* Do the rest in the tasklet. */
1473 tasklet_schedule(&channel->irq_tasklet);
1474}
1475
1476/**
1477 * Tasklet for IRQ handler
1478 */
1479static void
1480lcs_tasklet(unsigned long data)
1481{
1482 unsigned long flags;
1483 struct lcs_channel *channel;
1484 struct lcs_buffer *iob;
1485 int buf_idx;
1486 int rc;
1487
1488 channel = (struct lcs_channel *) data;
2a0217d5 1489 LCS_DBF_TEXT_(5, trace, "tlet%s", dev_name(&channel->ccwdev->dev));
1da177e4
LT		 1490
1491 /* Check for processed buffers. */
1492 iob = channel->iob;
1493 buf_idx = channel->buf_idx;
9163bb2e 1494 while (iob[buf_idx].state == LCS_BUF_STATE_PROCESSED) {
1da177e4
LT		 1495 /* Do the callback thing. */
1496 if (iob[buf_idx].callback != NULL)
1497 iob[buf_idx].callback(channel, iob + buf_idx);
1498 buf_idx = (buf_idx + 1) & (LCS_NUM_BUFFS - 1);
1499 }
1500 channel->buf_idx = buf_idx;
1501
9163bb2e 1502 if (channel->state == LCS_CH_STATE_STOPPED)
1da177e4
LT		 1503 // FIXME: what if rc != 0 ??
1504 rc = lcs_start_channel(channel);
1505 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
9163bb2e
UB		 1506 if (channel->state == LCS_CH_STATE_SUSPENDED &&
1507 channel->iob[channel->io_idx].state == LCS_BUF_STATE_READY) {
1da177e4
LT		 1508 // FIXME: what if rc != 0 ??
1509 rc = __lcs_resume_channel(channel);
1510 }
1511 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1512
1513 /* Something happened on the channel. Wake up waiters. */
1514 wake_up(&channel->wait_q);
1515}
1516
1517/**
1518 * Finish current tx buffer and make it ready for transmit.
1519 */
1520static void
1521__lcs_emit_txbuffer(struct lcs_card *card)
1522{
1523 LCS_DBF_TEXT(5, trace, "emittx");
1524 *(__u16 *)(card->tx_buffer->data + card->tx_buffer->count) = 0;
1525 card->tx_buffer->count += 2;
1526 lcs_ready_buffer(&card->write, card->tx_buffer);
1527 card->tx_buffer = NULL;
1528 card->tx_emitted++;
1529}
1530
1531/**
1532 * Callback for finished tx buffers.
1533 */
1534static void
1535lcs_txbuffer_cb(struct lcs_channel *channel, struct lcs_buffer *buffer)
1536{
1537 struct lcs_card *card;
1538
1539 LCS_DBF_TEXT(5, trace, "txbuffcb");
1540 /* Put buffer back to pool. */
1541 lcs_release_buffer(channel, buffer);
b385a144 1542 card = container_of(channel, struct lcs_card, write);
27eb5ac8 1543 if (netif_queue_stopped(card->dev) && netif_carrier_ok(card->dev))
0d613a27 1544 netif_wake_queue(card->dev);
1da177e4
LT		 1545 spin_lock(&card->lock);
1546 card->tx_emitted--;
1547 if (card->tx_emitted <= 0 && card->tx_buffer != NULL)
1548 /*
1549 * Last running tx buffer has finished. Submit partially
1550 * filled current buffer.
1551 */
1552 __lcs_emit_txbuffer(card);
1553 spin_unlock(&card->lock);
1554}
1555
1556/**
1557 * Packet transmit function called by network stack
1558 */
1559static int
1560__lcs_start_xmit(struct lcs_card *card, struct sk_buff *skb,
1561 struct net_device *dev)
1562{
1563 struct lcs_header *header;
ec634fe3 1564 int rc = NETDEV_TX_OK;
1da177e4
LT		 1565
1566 LCS_DBF_TEXT(5, trace, "hardxmit");
1567 if (skb == NULL) {
1568 card->stats.tx_dropped++;
1569 card->stats.tx_errors++;
ec634fe3 1570 return NETDEV_TX_OK;
1da177e4
LT		 1571 }
1572 if (card->state != DEV_STATE_UP) {
1573 dev_kfree_skb(skb);
1574 card->stats.tx_dropped++;
1575 card->stats.tx_errors++;
1576 card->stats.tx_carrier_errors++;
ec634fe3 1577 return NETDEV_TX_OK;
1da177e4 1578 }
27eb5ac8
KW		 1579 if (skb->protocol == htons(ETH_P_IPV6)) {
1580 dev_kfree_skb(skb);
ec634fe3 1581 return NETDEV_TX_OK;
27eb5ac8 1582 }
0d613a27
FP		 1583 netif_stop_queue(card->dev);
1584 spin_lock(&card->lock);
1da177e4
LT		 1585 if (card->tx_buffer != NULL &&
1586 card->tx_buffer->count + sizeof(struct lcs_header) +
1587 skb->len + sizeof(u16) > LCS_IOBUFFERSIZE)
1588 /* skb too big for current tx buffer. */
1589 __lcs_emit_txbuffer(card);
1590 if (card->tx_buffer == NULL) {
1591 /* Get new tx buffer */
1592 card->tx_buffer = lcs_get_buffer(&card->write);
1593 if (card->tx_buffer == NULL) {
1594 card->stats.tx_dropped++;
9e669d32 1595 rc = NETDEV_TX_BUSY;
0d613a27 1596 goto out;
1da177e4
LT		 1597 }
1598 card->tx_buffer->callback = lcs_txbuffer_cb;
1599 card->tx_buffer->count = 0;
1600 }
1601 header = (struct lcs_header *)
1602 (card->tx_buffer->data + card->tx_buffer->count);
1603 card->tx_buffer->count += skb->len + sizeof(struct lcs_header);
1604 header->offset = card->tx_buffer->count;
1605 header->type = card->lan_type;
1606 header->slot = card->portno;
d626f62b 1607 skb_copy_from_linear_data(skb, header + 1, skb->len);
0d613a27 1608 spin_unlock(&card->lock);
1da177e4
LT		 1609 card->stats.tx_bytes += skb->len;
1610 card->stats.tx_packets++;
1611 dev_kfree_skb(skb);
0d613a27
FP		 1612 netif_wake_queue(card->dev);
1613 spin_lock(&card->lock);
1614 if (card->tx_emitted <= 0 && card->tx_buffer != NULL)
1da177e4
LT		 1615 /* If this is the first tx buffer emit it immediately. */
1616 __lcs_emit_txbuffer(card);
0d613a27
FP		 1617out:
1618 spin_unlock(&card->lock);
1619 return rc;
1da177e4
LT		 1620}
1621
1622static int
1623lcs_start_xmit(struct sk_buff *skb, struct net_device *dev)
1624{
1625 struct lcs_card *card;
1626 int rc;
1627
1628 LCS_DBF_TEXT(5, trace, "pktxmit");
ad660e2f 1629 card = (struct lcs_card *) dev->ml_priv;
1da177e4 1630 rc = __lcs_start_xmit(card, skb, dev);
1da177e4
LT		 1631 return rc;
1632}
1633
1634/**
1635 * send startlan and lanstat command to make LCS device ready
1636 */
1637static int
1638lcs_startlan_auto(struct lcs_card *card)
1639{
1640 int rc;
1641
1642 LCS_DBF_TEXT(2, trace, "strtauto");
1643#ifdef CONFIG_NET_ETHERNET
1644 card->lan_type = LCS_FRAME_TYPE_ENET;
1645 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1646 if (rc == 0)
1647 return 0;
1648
1649#endif
1650#ifdef CONFIG_TR
1651 card->lan_type = LCS_FRAME_TYPE_TR;
1652 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1653 if (rc == 0)
1654 return 0;
1655#endif
1656#ifdef CONFIG_FDDI
1657 card->lan_type = LCS_FRAME_TYPE_FDDI;
1658 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1659 if (rc == 0)
1660 return 0;
1661#endif
1662 return -EIO;
1663}
1664
1665static int
1666lcs_startlan(struct lcs_card *card)
1667{
1668 int rc, i;
1669
1670 LCS_DBF_TEXT(2, trace, "startlan");
1671 rc = 0;
1672 if (card->portno != LCS_INVALID_PORT_NO) {
1673 if (card->lan_type == LCS_FRAME_TYPE_AUTO)
1674 rc = lcs_startlan_auto(card);
1675 else
1676 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1677 } else {
1678 for (i = 0; i <= 16; i++) {
1679 card->portno = i;
1680 if (card->lan_type != LCS_FRAME_TYPE_AUTO)
1681 rc = lcs_send_startlan(card,
1682 LCS_INITIATOR_TCPIP);
1683 else
1684 /* autodetecting lan type */
1685 rc = lcs_startlan_auto(card);
1686 if (rc == 0)
1687 break;
1688 }
1689 }
1690 if (rc == 0)
1691 return lcs_send_lanstat(card);
1692 return rc;
1693}
1694
1695/**
1696 * LCS detect function
1697 * setup channels and make them I/O ready
1698 */
1699static int
1700lcs_detect(struct lcs_card *card)
1701{
1702 int rc = 0;
1703
1704 LCS_DBF_TEXT(2, setup, "lcsdetct");
1705 /* start/reset card */
1706 if (card->dev)
1707 netif_stop_queue(card->dev);
1708 rc = lcs_stop_channels(card);
1709 if (rc == 0) {
1710 rc = lcs_start_channels(card);
1711 if (rc == 0) {
1712 rc = lcs_send_startup(card, LCS_INITIATOR_TCPIP);
1713 if (rc == 0)
1714 rc = lcs_startlan(card);
1715 }
1716 }
1717 if (rc == 0) {
1718 card->state = DEV_STATE_UP;
1719 } else {
1720 card->state = DEV_STATE_DOWN;
9163bb2e
UB		 1721 card->write.state = LCS_CH_STATE_INIT;
1722 card->read.state = LCS_CH_STATE_INIT;
1da177e4
LT		 1723 }
1724 return rc;
1725}
1726
1da177e4
LT		 1727/**
1728 * LCS Stop card
1729 */
1730static int
1731lcs_stopcard(struct lcs_card *card)
1732{
1733 int rc;
1734
1735 LCS_DBF_TEXT(3, setup, "stopcard");
1736
9163bb2e
UB		 1737 if (card->read.state != LCS_CH_STATE_STOPPED &&
1738 card->write.state != LCS_CH_STATE_STOPPED &&
59579da3
KW		 1739 card->read.state != LCS_CH_STATE_ERROR &&
1740 card->write.state != LCS_CH_STATE_ERROR &&
1da177e4
LT		 1741 card->state == DEV_STATE_UP) {
1742 lcs_clear_multicast_list(card);
1743 rc = lcs_send_stoplan(card,LCS_INITIATOR_TCPIP);
1744 rc = lcs_send_shutdown(card);
1745 }
1746 rc = lcs_stop_channels(card);
1747 card->state = DEV_STATE_DOWN;
1748
1749 return rc;
1750}
1751
1da177e4
LT		 1752/**
1753 * Kernel Thread helper functions for LGW initiated commands
1754 */
1755static void
4927b3f7 1756lcs_start_kernel_thread(struct work_struct *work)
1da177e4 1757{
4927b3f7 1758 struct lcs_card *card = container_of(work, struct lcs_card, kernel_thread_starter);
1da177e4 1759 LCS_DBF_TEXT(5, trace, "krnthrd");
27eb5ac8 1760 if (lcs_do_start_thread(card, LCS_RECOVERY_THREAD))
e5b5719b 1761 kthread_run(lcs_recovery, card, "lcs_recover");
1da177e4
LT		 1762#ifdef CONFIG_IP_MULTICAST
1763 if (lcs_do_start_thread(card, LCS_SET_MC_THREAD))
e5b5719b 1764 kthread_run(lcs_register_mc_addresses, card, "regipm");
1da177e4
LT		 1765#endif
1766}
1767
1768/**
1769 * Process control frames.
1770 */
1771static void
1772lcs_get_control(struct lcs_card *card, struct lcs_cmd *cmd)
1773{
1774 LCS_DBF_TEXT(5, trace, "getctrl");
1775 if (cmd->initiator == LCS_INITIATOR_LGW) {
1776 switch(cmd->cmd_code) {
1777 case LCS_CMD_STARTUP:
1da177e4 1778 case LCS_CMD_STARTLAN:
27eb5ac8 1779 lcs_schedule_recovery(card);
1da177e4
LT		 1780 break;
1781 case LCS_CMD_STOPLAN:
c99fc5da
KW		 1782 pr_warning("Stoplan for %s initiated by LGW.\n",
1783 card->dev->name);
27eb5ac8
KW		 1784 if (card->dev)
1785 netif_carrier_off(card->dev);
1da177e4
LT		 1786 break;
1787 default:
6b648063 1788 LCS_DBF_TEXT(5, trace, "noLGWcmd");
1da177e4
LT		 1789 break;
1790 }
1791 } else
1792 lcs_notify_lancmd_waiters(card, cmd);
1793}
1794
1795/**
1796 * Unpack network packet.
1797 */
1798static void
1799lcs_get_skb(struct lcs_card *card, char *skb_data, unsigned int skb_len)
1800{
1801 struct sk_buff *skb;
1802
1803 LCS_DBF_TEXT(5, trace, "getskb");
1804 if (card->dev == NULL ||
1805 card->state != DEV_STATE_UP)
1806 /* The card isn't up. Ignore the packet. */
1807 return;
1808
1809 skb = dev_alloc_skb(skb_len);
1810 if (skb == NULL) {
c99fc5da
KW		 1811 dev_err(&card->dev->dev,
1812 " Allocating a socket buffer to interface %s failed\n",
1da177e4
LT		 1813 card->dev->name);
1814 card->stats.rx_dropped++;
1815 return;
1816 }
1da177e4
LT		 1817 memcpy(skb_put(skb, skb_len), skb_data, skb_len);
1818 skb->protocol = card->lan_type_trans(skb, card->dev);
1819 card->stats.rx_bytes += skb_len;
1820 card->stats.rx_packets++;
93ad37d9
KW		 1821 if (skb->protocol == htons(ETH_P_802_2))
1822 *((__u32 *)skb->cb) = ++card->pkt_seq;
1da177e4
LT		 1823 netif_rx(skb);
1824}
1825
1826/**
1827 * LCS main routine to get packets and lancmd replies from the buffers
1828 */
1829static void
1830lcs_get_frames_cb(struct lcs_channel *channel, struct lcs_buffer *buffer)
1831{
1832 struct lcs_card *card;
1833 struct lcs_header *lcs_hdr;
1834 __u16 offset;
1835
1836 LCS_DBF_TEXT(5, trace, "lcsgtpkt");
1837 lcs_hdr = (struct lcs_header *) buffer->data;
1838 if (lcs_hdr->offset == LCS_ILLEGAL_OFFSET) {
1839 LCS_DBF_TEXT(4, trace, "-eiogpkt");
1840 return;
1841 }
b385a144 1842 card = container_of(channel, struct lcs_card, read);
1da177e4
LT		 1843 offset = 0;
1844 while (lcs_hdr->offset != 0) {
1845 if (lcs_hdr->offset <= 0 ||
1846 lcs_hdr->offset > LCS_IOBUFFERSIZE ||
1847 lcs_hdr->offset < offset) {
1848 /* Offset invalid. */
1849 card->stats.rx_length_errors++;
1850 card->stats.rx_errors++;
1851 return;
1852 }
1853 /* What kind of frame is it? */
1854 if (lcs_hdr->type == LCS_FRAME_TYPE_CONTROL)
1855 /* Control frame. */
1856 lcs_get_control(card, (struct lcs_cmd *) lcs_hdr);
1857 else if (lcs_hdr->type == LCS_FRAME_TYPE_ENET ||
1858 lcs_hdr->type == LCS_FRAME_TYPE_TR ||
1859 lcs_hdr->type == LCS_FRAME_TYPE_FDDI)
1860 /* Normal network packet. */
1861 lcs_get_skb(card, (char *)(lcs_hdr + 1),
1862 lcs_hdr->offset - offset -
1863 sizeof(struct lcs_header));
1864 else
1865 /* Unknown frame type. */
1866 ; // FIXME: error message ?
1867 /* Proceed to next frame. */
1868 offset = lcs_hdr->offset;
1869 lcs_hdr->offset = LCS_ILLEGAL_OFFSET;
1870 lcs_hdr = (struct lcs_header *) (buffer->data + offset);
1871 }
1872 /* The buffer is now empty. Make it ready again. */
1873 lcs_ready_buffer(&card->read, buffer);
1874}
1875
1876/**
1877 * get network statistics for ifconfig and other user programs
1878 */
1879static struct net_device_stats *
1880lcs_getstats(struct net_device *dev)
1881{
1882 struct lcs_card *card;
1883
1884 LCS_DBF_TEXT(4, trace, "netstats");
ad660e2f 1885 card = (struct lcs_card *) dev->ml_priv;
1da177e4
LT		 1886 return &card->stats;
1887}
1888
1889/**
1890 * stop lcs device
1891 * This function will be called by user doing ifconfig xxx down
1892 */
1893static int
1894lcs_stop_device(struct net_device *dev)
1895{
1896 struct lcs_card *card;
1897 int rc;
1898
1899 LCS_DBF_TEXT(2, trace, "stopdev");
ad660e2f 1900 card = (struct lcs_card *) dev->ml_priv;
27eb5ac8
KW		 1901 netif_carrier_off(dev);
1902 netif_tx_disable(dev);
1da177e4 1903 dev->flags &= ~IFF_UP;
27eb5ac8 1904 wait_event(card->write.wait_q,
9163bb2e 1905 (card->write.state != LCS_CH_STATE_RUNNING));
1da177e4
LT		 1906 rc = lcs_stopcard(card);
1907 if (rc)
c99fc5da
KW		 1908 dev_err(&card->dev->dev,
1909 " Shutting down the LCS device failed\n ");
1da177e4
LT		 1910 return rc;
1911}
1912
1913/**
1914 * start lcs device and make it runnable
1915 * This function will be called by user doing ifconfig xxx up
1916 */
1917static int
1918lcs_open_device(struct net_device *dev)
1919{
1920 struct lcs_card *card;
1921 int rc;
1922
1923 LCS_DBF_TEXT(2, trace, "opendev");
ad660e2f 1924 card = (struct lcs_card *) dev->ml_priv;
1da177e4
LT		 1925 /* initialize statistics */
1926 rc = lcs_detect(card);
1927 if (rc) {
c99fc5da 1928 pr_err("Error in opening device!\n");
1da177e4
LT		 1929
1930 } else {
1931 dev->flags |= IFF_UP;
27eb5ac8 1932 netif_carrier_on(dev);
1da177e4
LT		 1933 netif_wake_queue(dev);
1934 card->state = DEV_STATE_UP;
1935 }
1936 return rc;
1937}
1938
1939/**
1940 * show function for portno called by cat or similar things
1941 */
1942static ssize_t
3fd3c0a5 1943lcs_portno_show (struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 1944{
1945 struct lcs_card *card;
1946
dff59b64 1947 card = dev_get_drvdata(dev);
1da177e4
LT		 1948
1949 if (!card)
1950 return 0;
1951
1952 return sprintf(buf, "%d\n", card->portno);
1953}
1954
1955/**
1956 * store the value which is piped to file portno
1957 */
1958static ssize_t
3fd3c0a5 1959lcs_portno_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1da177e4
LT		 1960{
1961 struct lcs_card *card;
1962 int value;
1963
dff59b64 1964 card = dev_get_drvdata(dev);
1da177e4
LT		 1965
1966 if (!card)
1967 return 0;
1968
1969 sscanf(buf, "%u", &value);
1970 /* TODO: sanity checks */
1971 card->portno = value;
1972
1973 return count;
1974
1975}
1976
1977static DEVICE_ATTR(portno, 0644, lcs_portno_show, lcs_portno_store);
1978
0ca8cc6f
UB		 1979const char *lcs_type[] = {
1980 "not a channel",
1981 "2216 parallel",
1982 "2216 channel",
1983 "OSA LCS card",
1984 "unknown channel type",
1985 "unsupported channel type",
1986};
1987
1da177e4 1988static ssize_t
3fd3c0a5 1989lcs_type_show(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 1990{
1991 struct ccwgroup_device *cgdev;
1992
1993 cgdev = to_ccwgroupdev(dev);
1994 if (!cgdev)
1995 return -ENODEV;
1996
0ca8cc6f 1997 return sprintf(buf, "%s\n", lcs_type[cgdev->cdev[0]->id.driver_info]);
1da177e4
LT		 1998}
1999
2000static DEVICE_ATTR(type, 0444, lcs_type_show, NULL);
2001
2002static ssize_t
3fd3c0a5 2003lcs_timeout_show(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 2004{
2005 struct lcs_card *card;
2006
dff59b64 2007 card = dev_get_drvdata(dev);
1da177e4
LT		 2008
2009 return card ? sprintf(buf, "%u\n", card->lancmd_timeout) : 0;
2010}
2011
2012static ssize_t
3fd3c0a5 2013lcs_timeout_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1da177e4
LT		 2014{
2015 struct lcs_card *card;
2016 int value;
2017
dff59b64 2018 card = dev_get_drvdata(dev);
1da177e4
LT		 2019
2020 if (!card)
2021 return 0;
2022
2023 sscanf(buf, "%u", &value);
2024 /* TODO: sanity checks */
2025 card->lancmd_timeout = value;
2026
2027 return count;
2028
2029}
2030
2b67fc46 2031static DEVICE_ATTR(lancmd_timeout, 0644, lcs_timeout_show, lcs_timeout_store);
1da177e4 2032
27eb5ac8 2033static ssize_t
e82b0f2c 2034lcs_dev_recover_store(struct device *dev, struct device_attribute *attr,
27eb5ac8
KW		 2035 const char *buf, size_t count)
2036{
dff59b64 2037 struct lcs_card *card = dev_get_drvdata(dev);
27eb5ac8
KW		 2038 char *tmp;
2039 int i;
2040
2041 if (!card)
2042 return -EINVAL;
2043 if (card->state != DEV_STATE_UP)
2044 return -EPERM;
2045 i = simple_strtoul(buf, &tmp, 16);
2046 if (i == 1)
2047 lcs_schedule_recovery(card);
2048 return count;
2049}
2050
2051static DEVICE_ATTR(recover, 0200, NULL, lcs_dev_recover_store);
2052
1da177e4
LT		 2053static struct attribute * lcs_attrs[] = {
2054 &dev_attr_portno.attr,
2055 &dev_attr_type.attr,
2056 &dev_attr_lancmd_timeout.attr,
27eb5ac8 2057 &dev_attr_recover.attr,
1da177e4
LT		 2058 NULL,
2059};
2060
2061static struct attribute_group lcs_attr_group = {
2062 .attrs = lcs_attrs,
2063};
2064
2065/**
2066 * lcs_probe_device is called on establishing a new ccwgroup_device.
2067 */
2068static int
2069lcs_probe_device(struct ccwgroup_device *ccwgdev)
2070{
2071 struct lcs_card *card;
2072 int ret;
2073
2074 if (!get_device(&ccwgdev->dev))
2075 return -ENODEV;
2076
2077 LCS_DBF_TEXT(2, setup, "add_dev");
2078 card = lcs_alloc_card();
2079 if (!card) {
6b648063 2080 LCS_DBF_TEXT_(2, setup, " rc%d", -ENOMEM);
1da177e4
LT		 2081 put_device(&ccwgdev->dev);
2082 return -ENOMEM;
2083 }
2084 ret = sysfs_create_group(&ccwgdev->dev.kobj, &lcs_attr_group);
2085 if (ret) {
1da177e4
LT		 2086 lcs_free_card(card);
2087 put_device(&ccwgdev->dev);
2088 return ret;
2089 }
dff59b64 2090 dev_set_drvdata(&ccwgdev->dev, card);
1da177e4
LT		 2091 ccwgdev->cdev[0]->handler = lcs_irq;
2092 ccwgdev->cdev[1]->handler = lcs_irq;
27eb5ac8 2093 card->gdev = ccwgdev;
4927b3f7 2094 INIT_WORK(&card->kernel_thread_starter, lcs_start_kernel_thread);
27eb5ac8
KW		 2095 card->thread_start_mask = 0;
2096 card->thread_allowed_mask = 0;
2097 card->thread_running_mask = 0;
1da177e4
LT		 2098 return 0;
2099}
2100
2101static int
2102lcs_register_netdev(struct ccwgroup_device *ccwgdev)
2103{
2104 struct lcs_card *card;
2105
2106 LCS_DBF_TEXT(2, setup, "regnetdv");
dff59b64 2107 card = dev_get_drvdata(&ccwgdev->dev);
1da177e4
LT		 2108 if (card->dev->reg_state != NETREG_UNINITIALIZED)
2109 return 0;
2110 SET_NETDEV_DEV(card->dev, &ccwgdev->dev);
2111 return register_netdev(card->dev);
2112}
2113
2114/**
2115 * lcs_new_device will be called by setting the group device online.
2116 */
0e0b46d8
FB		 2117static const struct net_device_ops lcs_netdev_ops = {
2118 .ndo_open = lcs_open_device,
2119 .ndo_stop = lcs_stop_device,
2120 .ndo_get_stats = lcs_getstats,
2121 .ndo_start_xmit = lcs_start_xmit,
2122};
2123
2124static const struct net_device_ops lcs_mc_netdev_ops = {
2125 .ndo_open = lcs_open_device,
2126 .ndo_stop = lcs_stop_device,
2127 .ndo_get_stats = lcs_getstats,
2128 .ndo_start_xmit = lcs_start_xmit,
2129 .ndo_set_multicast_list = lcs_set_multicast_list,
2130};
1da177e4
LT		 2131
2132static int
2133lcs_new_device(struct ccwgroup_device *ccwgdev)
2134{
2135 struct lcs_card *card;
2136 struct net_device *dev=NULL;
2137 enum lcs_dev_states recover_state;
2138 int rc;
2139
dff59b64 2140 card = dev_get_drvdata(&ccwgdev->dev);
1da177e4
LT		 2141 if (!card)
2142 return -ENODEV;
2143
2144 LCS_DBF_TEXT(2, setup, "newdev");
2145 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
2146 card->read.ccwdev = ccwgdev->cdev[0];
2147 card->write.ccwdev = ccwgdev->cdev[1];
2148
2149 recover_state = card->state;
d816d423
KDW		 2150 rc = ccw_device_set_online(card->read.ccwdev);
2151 if (rc)
2152 goto out_err;
2153 rc = ccw_device_set_online(card->write.ccwdev);
2154 if (rc)
2155 goto out_werr;
1da177e4
LT		 2156
2157 LCS_DBF_TEXT(3, setup, "lcsnewdv");
2158
2159 lcs_setup_card(card);
2160 rc = lcs_detect(card);
2161 if (rc) {
2162 LCS_DBF_TEXT(2, setup, "dtctfail");
c99fc5da
KW		 2163 dev_err(&card->dev->dev,
2164 "Detecting a network adapter for LCS devices"
2165 " failed with rc=%d (0x%x)\n", rc, rc);
1da177e4
LT		 2166 lcs_stopcard(card);
2167 goto out;
2168 }
2169 if (card->dev) {
2170 LCS_DBF_TEXT(2, setup, "samedev");
2171 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
2172 goto netdev_out;
2173 }
2174 switch (card->lan_type) {
2175#ifdef CONFIG_NET_ETHERNET
2176 case LCS_FRAME_TYPE_ENET:
2177 card->lan_type_trans = eth_type_trans;
2178 dev = alloc_etherdev(0);
2179 break;
2180#endif
2181#ifdef CONFIG_TR
2182 case LCS_FRAME_TYPE_TR:
2183 card->lan_type_trans = tr_type_trans;
2184 dev = alloc_trdev(0);
2185 break;
2186#endif
2187#ifdef CONFIG_FDDI
2188 case LCS_FRAME_TYPE_FDDI:
2189 card->lan_type_trans = fddi_type_trans;
2190 dev = alloc_fddidev(0);
2191 break;
2192#endif
2193 default:
2194 LCS_DBF_TEXT(3, setup, "errinit");
c99fc5da 2195 pr_err(" Initialization failed\n");
1da177e4
LT		 2196 goto out;
2197 }
2198 if (!dev)
2199 goto out;
2200 card->dev = dev;
ad660e2f 2201 card->dev->ml_priv = card;
0e0b46d8 2202 card->dev->netdev_ops = &lcs_netdev_ops;
1da177e4
LT		 2203 memcpy(card->dev->dev_addr, card->mac, LCS_MAC_LENGTH);
2204#ifdef CONFIG_IP_MULTICAST
2205 if (!lcs_check_multicast_support(card))
0e0b46d8 2206 card->dev->netdev_ops = &lcs_mc_netdev_ops;
1da177e4 2207#endif
b5f9d55b 2208netdev_out:
1da177e4
LT		 2209 lcs_set_allowed_threads(card,0xffffffff);
2210 if (recover_state == DEV_STATE_RECOVER) {
2211 lcs_set_multicast_list(card->dev);
2212 card->dev->flags |= IFF_UP;
27eb5ac8 2213 netif_carrier_on(card->dev);
1da177e4
LT		 2214 netif_wake_queue(card->dev);
2215 card->state = DEV_STATE_UP;
b5f9d55b 2216 } else {
1da177e4 2217 lcs_stopcard(card);
b5f9d55b 2218 }
1da177e4 2219
b5f9d55b
FP		 2220 if (lcs_register_netdev(ccwgdev) != 0)
2221 goto out;
2222
2223 /* Print out supported assists: IPv6 */
c99fc5da
KW		 2224 pr_info("LCS device %s %s IPv6 support\n", card->dev->name,
2225 (card->ip_assists_supported & LCS_IPASS_IPV6_SUPPORT) ?
2226 "with" : "without");
b5f9d55b 2227 /* Print out supported assist: Multicast */
c99fc5da
KW		 2228 pr_info("LCS device %s %s Multicast support\n", card->dev->name,
2229 (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) ?
2230 "with" : "without");
1da177e4
LT		 2231 return 0;
2232out:
2233
1da177e4 2234 ccw_device_set_offline(card->write.ccwdev);
d816d423
KDW		 2235out_werr:
2236 ccw_device_set_offline(card->read.ccwdev);
2237out_err:
1da177e4
LT		 2238 return -ENODEV;
2239}
2240
2241/**
2242 * lcs_shutdown_device, called when setting the group device offline.
2243 */
2244static int
27eb5ac8 2245__lcs_shutdown_device(struct ccwgroup_device *ccwgdev, int recovery_mode)
1da177e4
LT		 2246{
2247 struct lcs_card *card;
2248 enum lcs_dev_states recover_state;
2249 int ret;
2250
2251 LCS_DBF_TEXT(3, setup, "shtdndev");
dff59b64 2252 card = dev_get_drvdata(&ccwgdev->dev);
1da177e4
LT		 2253 if (!card)
2254 return -ENODEV;
27eb5ac8
KW		 2255 if (recovery_mode == 0) {
2256 lcs_set_allowed_threads(card, 0);
2257 if (lcs_wait_for_threads(card, LCS_SET_MC_THREAD))
2258 return -ERESTARTSYS;
2259 }
1da177e4
LT		 2260 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
2261 recover_state = card->state;
2262
2263 ret = lcs_stop_device(card->dev);
2264 ret = ccw_device_set_offline(card->read.ccwdev);
2265 ret = ccw_device_set_offline(card->write.ccwdev);
2266 if (recover_state == DEV_STATE_UP) {
2267 card->state = DEV_STATE_RECOVER;
2268 }
2269 if (ret)
2270 return ret;
2271 return 0;
2272}
2273
27eb5ac8
KW		 2274static int
2275lcs_shutdown_device(struct ccwgroup_device *ccwgdev)
2276{
2277 return __lcs_shutdown_device(ccwgdev, 0);
2278}
2279
2280/**
2281 * drive lcs recovery after startup and startlan initiated by Lan Gateway
2282 */
2283static int
2284lcs_recovery(void *ptr)
2285{
2286 struct lcs_card *card;
2287 struct ccwgroup_device *gdev;
2288 int rc;
2289
2290 card = (struct lcs_card *) ptr;
27eb5ac8
KW		 2291
2292 LCS_DBF_TEXT(4, trace, "recover1");
2293 if (!lcs_do_run_thread(card, LCS_RECOVERY_THREAD))
2294 return 0;
2295 LCS_DBF_TEXT(4, trace, "recover2");
2296 gdev = card->gdev;
c99fc5da
KW		 2297 dev_warn(&gdev->dev,
2298 "A recovery process has been started for the LCS device\n");
27eb5ac8
KW		 2299 rc = __lcs_shutdown_device(gdev, 1);
2300 rc = lcs_new_device(gdev);
2301 if (!rc)
c99fc5da
KW		 2302 pr_info("Device %s successfully recovered!\n",
2303 card->dev->name);
27eb5ac8 2304 else
c99fc5da
KW		 2305 pr_info("Device %s could not be recovered!\n",
2306 card->dev->name);
27eb5ac8
KW		 2307 lcs_clear_thread_running_bit(card, LCS_RECOVERY_THREAD);
2308 return 0;
2309}
2310
1da177e4
LT		 2311/**
2312 * lcs_remove_device, free buffers and card
2313 */
2314static void
2315lcs_remove_device(struct ccwgroup_device *ccwgdev)
2316{
2317 struct lcs_card *card;
2318
dff59b64 2319 card = dev_get_drvdata(&ccwgdev->dev);
1da177e4
LT		 2320 if (!card)
2321 return;
2322
1da177e4
LT		 2323 LCS_DBF_TEXT(3, setup, "remdev");
2324 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
2325 if (ccwgdev->state == CCWGROUP_ONLINE) {
2326 lcs_shutdown_device(ccwgdev);
2327 }
2328 if (card->dev)
2329 unregister_netdev(card->dev);
2330 sysfs_remove_group(&ccwgdev->dev.kobj, &lcs_attr_group);
2331 lcs_cleanup_card(card);
2332 lcs_free_card(card);
2333 put_device(&ccwgdev->dev);
2334}
2335
cbb2aec3
KDW		 2336static int lcs_pm_suspend(struct lcs_card *card)
2337{
2338 if (card->dev)
2339 netif_device_detach(card->dev);
2340 lcs_set_allowed_threads(card, 0);
2341 lcs_wait_for_threads(card, 0xffffffff);
2342 if (card->state != DEV_STATE_DOWN)
2343 __lcs_shutdown_device(card->gdev, 1);
2344 return 0;
2345}
2346
2347static int lcs_pm_resume(struct lcs_card *card)
2348{
2349 int rc = 0;
2350
2351 if (card->state == DEV_STATE_RECOVER)
2352 rc = lcs_new_device(card->gdev);
2353 if (card->dev)
2354 netif_device_attach(card->dev);
2355 if (rc) {
2356 dev_warn(&card->gdev->dev, "The lcs device driver "
2357 "failed to recover the device\n");
2358 }
2359 return rc;
2360}
2361
2362static int lcs_prepare(struct ccwgroup_device *gdev)
2363{
2364 return 0;
2365}
2366
2367static void lcs_complete(struct ccwgroup_device *gdev)
2368{
2369 return;
2370}
2371
2372static int lcs_freeze(struct ccwgroup_device *gdev)
2373{
2374 struct lcs_card *card = dev_get_drvdata(&gdev->dev);
2375 return lcs_pm_suspend(card);
2376}
2377
2378static int lcs_thaw(struct ccwgroup_device *gdev)
2379{
2380 struct lcs_card *card = dev_get_drvdata(&gdev->dev);
2381 return lcs_pm_resume(card);
2382}
2383
2384static int lcs_restore(struct ccwgroup_device *gdev)
2385{
2386 struct lcs_card *card = dev_get_drvdata(&gdev->dev);
2387 return lcs_pm_resume(card);
2388}
2389
0ca8cc6f
UB		 2390static struct ccw_device_id lcs_ids[] = {
2391 {CCW_DEVICE(0x3088, 0x08), .driver_info = lcs_channel_type_parallel},
2392 {CCW_DEVICE(0x3088, 0x1f), .driver_info = lcs_channel_type_2216},
2393 {CCW_DEVICE(0x3088, 0x60), .driver_info = lcs_channel_type_osa2},
2394 {},
2395};
2396MODULE_DEVICE_TABLE(ccw, lcs_ids);
2397
2398static struct ccw_driver lcs_ccw_driver = {
3bda058b
SO		 2399 .driver = {
2400 .owner = THIS_MODULE,
2401 .name = "lcs",
2402 },
0ca8cc6f
UB		 2403 .ids = lcs_ids,
2404 .probe = ccwgroup_probe_ccwdev,
2405 .remove = ccwgroup_remove_ccwdev,
2406};
2407
1da177e4
LT		 2408/**
2409 * LCS ccwgroup driver registration
2410 */
2411static struct ccwgroup_driver lcs_group_driver = {
3c190c51
SO		 2412 .driver = {
2413 .owner = THIS_MODULE,
2414 .name = "lcs",
2415 },
1da177e4
LT		 2416 .max_slaves = 2,
2417 .driver_id = 0xD3C3E2,
2418 .probe = lcs_probe_device,
2419 .remove = lcs_remove_device,
2420 .set_online = lcs_new_device,
2421 .set_offline = lcs_shutdown_device,
cbb2aec3
KDW		 2422 .prepare = lcs_prepare,
2423 .complete = lcs_complete,
2424 .freeze = lcs_freeze,
2425 .thaw = lcs_thaw,
2426 .restore = lcs_restore,
1da177e4
LT		 2427};
2428
0ca8cc6f
UB		 2429static ssize_t
2430lcs_driver_group_store(struct device_driver *ddrv, const char *buf,
2431 size_t count)
2432{
2433 int err;
2434 err = ccwgroup_create_from_string(lcs_root_dev,
2435 lcs_group_driver.driver_id,
2436 &lcs_ccw_driver, 2, buf);
2437 return err ? err : count;
2438}
2439
2440static DRIVER_ATTR(group, 0200, NULL, lcs_driver_group_store);
2441
2442static struct attribute *lcs_group_attrs[] = {
2443 &driver_attr_group.attr,
2444 NULL,
2445};
2446
2447static struct attribute_group lcs_group_attr_group = {
2448 .attrs = lcs_group_attrs,
2449};
2450
302689ac 2451static const struct attribute_group *lcs_group_attr_groups[] = {
0ca8cc6f
UB		 2452 &lcs_group_attr_group,
2453 NULL,
2454};
2455
1da177e4
LT		 2456/**
2457 * LCS Module/Kernel initialization function
2458 */
2459static int
2460__init lcs_init_module(void)
2461{
2462 int rc;
2463
c99fc5da 2464 pr_info("Loading %s\n", version);
1da177e4
LT		 2465 rc = lcs_register_debug_facility();
2466 LCS_DBF_TEXT(0, setup, "lcsinit");
0ca8cc6f
UB		 2467 if (rc)
2468 goto out_err;
2469 lcs_root_dev = root_device_register("lcs");
2470 rc = IS_ERR(lcs_root_dev) ? PTR_ERR(lcs_root_dev) : 0;
2471 if (rc)
2472 goto register_err;
2473 rc = ccw_driver_register(&lcs_ccw_driver);
2474 if (rc)
2475 goto ccw_err;
2476 lcs_group_driver.driver.groups = lcs_group_attr_groups;
2477 rc = ccwgroup_driver_register(&lcs_group_driver);
2478 if (rc)
2479 goto ccwgroup_err;
1da177e4 2480 return 0;
0ca8cc6f
UB		 2481
2482ccwgroup_err:
2483 ccw_driver_unregister(&lcs_ccw_driver);
2484ccw_err:
2485 root_device_unregister(lcs_root_dev);
2486register_err:
2487 lcs_unregister_debug_facility();
2488out_err:
2489 pr_err("Initializing the lcs device driver failed\n");
2490 return rc;
1da177e4
LT		 2491}
2492
2493
2494/**
2495 * LCS module cleanup function
2496 */
2497static void
2498__exit lcs_cleanup_module(void)
2499{
c99fc5da 2500 pr_info("Terminating lcs module.\n");
1da177e4 2501 LCS_DBF_TEXT(0, trace, "cleanup");
0ca8cc6f
UB		 2502 driver_remove_file(&lcs_group_driver.driver,
2503 &driver_attr_group);
2504 ccwgroup_driver_unregister(&lcs_group_driver);
2505 ccw_driver_unregister(&lcs_ccw_driver);
2506 root_device_unregister(lcs_root_dev);
1da177e4
LT		 2507 lcs_unregister_debug_facility();
2508}
2509
2510module_init(lcs_init_module);
2511module_exit(lcs_cleanup_module);
2512
1387780f 2513MODULE_AUTHOR("Frank Pavlic <fpavlic@de.ibm.com>");
1da177e4
LT		 2514MODULE_LICENSE("GPL");
2515
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