2 * Linux for S/390 Lan Channel Station Network Driver
4 * Copyright IBM Corp. 1999, 2009
5 * Author(s): Original Code written by
6 * DJ Barrow <djbarrow@de.ibm.com,barrow_dj@yahoo.com>
8 * Frank Pavlic <fpavlic@de.ibm.com> and
9 * Martin Schwidefsky <schwidefsky@de.ibm.com>
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)
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.
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.
26 #define KMSG_COMPONENT "lcs"
27 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
29 #include <linux/kernel_stat.h>
30 #include <linux/module.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>
38 #include <linux/igmp.h>
39 #include <linux/delay.h>
40 #include <linux/kthread.h>
41 #include <linux/slab.h>
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>
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.
60 * initialization string for output
63 static char version[] __initdata = "LCS driver";
66 * the root device for lcs group devices
68 static struct device *lcs_root_dev;
73 static void lcs_tasklet(unsigned long);
74 static void lcs_start_kernel_thread(struct work_struct *);
75 static void lcs_get_frames_cb(struct lcs_channel *, struct lcs_buffer *);
76 #ifdef CONFIG_IP_MULTICAST
77 static int lcs_send_delipm(struct lcs_card *, struct lcs_ipm_list *);
78 #endif /* CONFIG_IP_MULTICAST */
79 static int lcs_recovery(void *ptr);
82 * Debug Facility Stuff
84 static char debug_buffer[255];
85 static debug_info_t *lcs_dbf_setup;
86 static debug_info_t *lcs_dbf_trace;
89 * LCS Debug Facility functions
92 lcs_unregister_debug_facility(void)
95 debug_unregister(lcs_dbf_setup);
97 debug_unregister(lcs_dbf_trace);
101 lcs_register_debug_facility(void)
103 lcs_dbf_setup = debug_register("lcs_setup", 2, 1, 8);
104 lcs_dbf_trace = debug_register("lcs_trace", 4, 1, 8);
105 if (lcs_dbf_setup == NULL || lcs_dbf_trace == NULL) {
106 pr_err("Not enough memory for debug facility.\n");
107 lcs_unregister_debug_facility();
110 debug_register_view(lcs_dbf_setup, &debug_hex_ascii_view);
111 debug_set_level(lcs_dbf_setup, 2);
112 debug_register_view(lcs_dbf_trace, &debug_hex_ascii_view);
113 debug_set_level(lcs_dbf_trace, 2);
118 * Allocate io buffers.
121 lcs_alloc_channel(struct lcs_channel *channel)
125 LCS_DBF_TEXT(2, setup, "ichalloc");
126 for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
127 /* alloc memory fo iobuffer */
128 channel->iob[cnt].data =
129 kzalloc(LCS_IOBUFFERSIZE, GFP_DMA | GFP_KERNEL);
130 if (channel->iob[cnt].data == NULL)
132 channel->iob[cnt].state = LCS_BUF_STATE_EMPTY;
134 if (cnt < LCS_NUM_BUFFS) {
135 /* Not all io buffers could be allocated. */
136 LCS_DBF_TEXT(2, setup, "echalloc");
138 kfree(channel->iob[cnt].data);
148 lcs_free_channel(struct lcs_channel *channel)
152 LCS_DBF_TEXT(2, setup, "ichfree");
153 for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
154 kfree(channel->iob[cnt].data);
155 channel->iob[cnt].data = NULL;
163 lcs_cleanup_channel(struct lcs_channel *channel)
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);
173 * LCS free memory for card and channels.
176 lcs_free_card(struct lcs_card *card)
178 LCS_DBF_TEXT(2, setup, "remcard");
179 LCS_DBF_HEX(2, setup, &card, sizeof(void*));
184 * LCS alloc memory for card and channels
186 static struct lcs_card *
189 struct lcs_card *card;
192 LCS_DBF_TEXT(2, setup, "alloclcs");
194 card = kzalloc(sizeof(struct lcs_card), GFP_KERNEL | GFP_DMA);
197 card->lan_type = LCS_FRAME_TYPE_AUTO;
199 card->lancmd_timeout = LCS_LANCMD_TIMEOUT_DEFAULT;
200 /* Allocate io buffers for the read channel. */
201 rc = lcs_alloc_channel(&card->read);
203 LCS_DBF_TEXT(2, setup, "iccwerr");
207 /* Allocate io buffers for the write channel. */
208 rc = lcs_alloc_channel(&card->write);
210 LCS_DBF_TEXT(2, setup, "iccwerr");
211 lcs_cleanup_channel(&card->read);
216 #ifdef CONFIG_IP_MULTICAST
217 INIT_LIST_HEAD(&card->ipm_list);
219 LCS_DBF_HEX(2, setup, &card, sizeof(void*));
224 * Setup read channel.
227 lcs_setup_read_ccws(struct lcs_card *card)
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;
240 * Note: we have allocated the buffer with GFP_DMA, so
241 * we do not need to do set_normalized_cda.
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;
248 card->read.iob[cnt].state = LCS_BUF_STATE_READY;
249 card->read.iob[cnt].count = LCS_IOBUFFERSIZE;
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. */
259 card->read.state = LCS_CH_STATE_INIT;
261 card->read.io_idx = 0;
262 card->read.buf_idx = 0;
266 lcs_setup_read(struct lcs_card *card)
268 LCS_DBF_TEXT(3, setup, "initread");
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);
279 * Setup write channel.
282 lcs_setup_write_ccws(struct lcs_card *card)
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;
295 * Note: we have allocated the buffer with GFP_DMA, so
296 * we do not need to do set_normalized_cda.
298 card->write.ccws[cnt].cda =
299 (__u32) __pa(card->write.iob[cnt].data);
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. */
306 card->read.state = LCS_CH_STATE_INIT;
308 card->write.io_idx = 0;
309 card->write.buf_idx = 0;
313 lcs_setup_write(struct lcs_card *card)
315 LCS_DBF_TEXT(3, setup, "initwrit");
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);
326 lcs_set_allowed_threads(struct lcs_card *card, unsigned long threads)
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);
336 lcs_threads_running(struct lcs_card *card, unsigned long threads)
341 spin_lock_irqsave(&card->mask_lock, flags);
342 rc = (card->thread_running_mask & threads);
343 spin_unlock_irqrestore(&card->mask_lock, flags);
348 lcs_wait_for_threads(struct lcs_card *card, unsigned long threads)
350 return wait_event_interruptible(card->wait_q,
351 lcs_threads_running(card, threads) == 0);
355 lcs_set_thread_start_bit(struct lcs_card *card, unsigned long thread)
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);
365 card->thread_start_mask |= thread;
366 spin_unlock_irqrestore(&card->mask_lock, flags);
371 lcs_clear_thread_running_bit(struct lcs_card *card, unsigned long thread)
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);
382 __lcs_do_run_thread(struct lcs_card *card, unsigned long thread)
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)){
392 card->thread_start_mask &= ~thread;
393 card->thread_running_mask |= thread;
397 spin_unlock_irqrestore(&card->mask_lock, flags);
402 lcs_do_run_thread(struct lcs_card *card, unsigned long thread)
405 wait_event(card->wait_q,
406 (rc = __lcs_do_run_thread(card, thread)) >= 0);
411 lcs_do_start_thread(struct lcs_card *card, unsigned long thread)
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);
427 * Initialize channels,card and state machines.
430 lcs_setup_card(struct lcs_card *card)
432 LCS_DBF_TEXT(2, setup, "initcard");
433 LCS_DBF_HEX(2, setup, &card, sizeof(void*));
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;
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);
449 INIT_LIST_HEAD(&card->lancmd_waiters);
453 lcs_clear_multicast_list(struct lcs_card *card)
455 #ifdef CONFIG_IP_MULTICAST
456 struct lcs_ipm_list *ipm;
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);
473 spin_unlock_irqrestore(&card->ipm_lock, flags);
477 * Cleanup channels,card and state machines.
480 lcs_cleanup_card(struct lcs_card *card)
483 LCS_DBF_TEXT(3, setup, "cleancrd");
484 LCS_DBF_HEX(2,setup,&card,sizeof(void*));
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);
497 lcs_start_channel(struct lcs_channel *channel)
502 LCS_DBF_TEXT_(4, trace,"ssch%s", dev_name(&channel->ccwdev->dev));
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);
508 channel->state = LCS_CH_STATE_RUNNING;
509 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
511 LCS_DBF_TEXT_(4,trace,"essh%s",
512 dev_name(&channel->ccwdev->dev));
513 dev_err(&channel->ccwdev->dev,
514 "Starting an LCS device resulted in an error,"
521 lcs_clear_channel(struct lcs_channel *channel)
526 LCS_DBF_TEXT(4,trace,"clearch");
527 LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev));
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);
532 LCS_DBF_TEXT_(4, trace, "ecsc%s",
533 dev_name(&channel->ccwdev->dev));
536 wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_CLEARED));
537 channel->state = LCS_CH_STATE_STOPPED;
546 lcs_stop_channel(struct lcs_channel *channel)
551 if (channel->state == LCS_CH_STATE_STOPPED)
553 LCS_DBF_TEXT(4,trace,"haltsch");
554 LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev));
555 channel->state = LCS_CH_STATE_INIT;
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);
560 LCS_DBF_TEXT_(4, trace, "ehsc%s",
561 dev_name(&channel->ccwdev->dev));
564 /* Asynchronous halt initialted. Wait for its completion. */
565 wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_HALTED));
566 lcs_clear_channel(channel);
571 * start read and write channel
574 lcs_start_channels(struct lcs_card *card)
578 LCS_DBF_TEXT(2, trace, "chstart");
579 /* start read channel */
580 rc = lcs_start_channel(&card->read);
583 /* start write channel */
584 rc = lcs_start_channel(&card->write);
586 lcs_stop_channel(&card->read);
591 * stop read and write channel
594 lcs_stop_channels(struct lcs_card *card)
596 LCS_DBF_TEXT(2, trace, "chhalt");
597 lcs_stop_channel(&card->read);
598 lcs_stop_channel(&card->write);
605 static struct lcs_buffer *
606 __lcs_get_buffer(struct lcs_channel *channel)
610 LCS_DBF_TEXT(5, trace, "_getbuff");
611 index = channel->io_idx;
613 if (channel->iob[index].state == LCS_BUF_STATE_EMPTY) {
614 channel->iob[index].state = LCS_BUF_STATE_LOCKED;
615 return channel->iob + index;
617 index = (index + 1) & (LCS_NUM_BUFFS - 1);
618 } while (index != channel->io_idx);
622 static struct lcs_buffer *
623 lcs_get_buffer(struct lcs_channel *channel)
625 struct lcs_buffer *buffer;
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);
636 * Resume channel program if the channel is suspended.
639 __lcs_resume_channel(struct lcs_channel *channel)
643 if (channel->state != LCS_CH_STATE_SUSPENDED)
645 if (channel->ccws[channel->io_idx].flags & CCW_FLAG_SUSPEND)
647 LCS_DBF_TEXT_(5, trace, "rsch%s", dev_name(&channel->ccwdev->dev));
648 rc = ccw_device_resume(channel->ccwdev);
650 LCS_DBF_TEXT_(4, trace, "ersc%s",
651 dev_name(&channel->ccwdev->dev));
652 dev_err(&channel->ccwdev->dev,
653 "Sending data from the LCS device to the LAN failed"
656 channel->state = LCS_CH_STATE_RUNNING;
662 * Make a buffer ready for processing.
665 __lcs_ready_buffer_bits(struct lcs_channel *channel, int index)
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;
684 lcs_ready_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
689 LCS_DBF_TEXT(5, trace, "rdybuff");
690 BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED &&
691 buffer->state != LCS_BUF_STATE_PROCESSED);
692 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
693 buffer->state = LCS_BUF_STATE_READY;
694 index = buffer - channel->iob;
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);
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.
710 __lcs_processed_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
712 int index, prev, next;
714 LCS_DBF_TEXT(5, trace, "prcsbuff");
715 BUG_ON(buffer->state != LCS_BUF_STATE_READY);
716 buffer->state = LCS_BUF_STATE_PROCESSED;
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. */
724 if (channel->iob[prev].state == LCS_BUF_STATE_READY) {
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.
731 __lcs_ready_buffer_bits(channel, prev);
733 /* Clear PCI bit of next buffer. */
734 channel->ccws[next].flags &= ~CCW_FLAG_PCI;
735 return __lcs_resume_channel(channel);
739 * Put a processed buffer back to state empty.
742 lcs_release_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
746 LCS_DBF_TEXT(5, trace, "relbuff");
747 BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED &&
748 buffer->state != LCS_BUF_STATE_PROCESSED);
749 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
750 buffer->state = LCS_BUF_STATE_EMPTY;
751 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
755 * Get buffer for a lan command.
757 static struct lcs_buffer *
758 lcs_get_lancmd(struct lcs_card *card, int count)
760 struct lcs_buffer *buffer;
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;
773 cmd->type = LCS_FRAME_TYPE_CONTROL;
780 lcs_get_reply(struct lcs_reply *reply)
782 WARN_ON(atomic_read(&reply->refcnt) <= 0);
783 atomic_inc(&reply->refcnt);
787 lcs_put_reply(struct lcs_reply *reply)
789 WARN_ON(atomic_read(&reply->refcnt) <= 0);
790 if (atomic_dec_and_test(&reply->refcnt)) {
796 static struct lcs_reply *
797 lcs_alloc_reply(struct lcs_cmd *cmd)
799 struct lcs_reply *reply;
801 LCS_DBF_TEXT(4, trace, "getreply");
803 reply = kzalloc(sizeof(struct lcs_reply), GFP_ATOMIC);
806 atomic_set(&reply->refcnt,1);
807 reply->sequence_no = cmd->sequence_no;
810 init_waitqueue_head(&reply->wait_q);
816 * Notifier function for lancmd replies. Called from read irq.
819 lcs_notify_lancmd_waiters(struct lcs_card *card, struct lcs_cmd *cmd)
821 struct list_head *l, *n;
822 struct lcs_reply *reply;
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);
834 reply->rc = cmd->return_code;
835 wake_up(&reply->wait_q);
836 lcs_put_reply(reply);
840 spin_unlock(&card->lock);
844 * Emit buffer of a lan command.
847 lcs_lancmd_timeout(unsigned long data)
849 struct lcs_reply *reply, *list_reply, *r;
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);
863 wake_up(&reply->wait_q);
864 lcs_put_reply(reply);
868 spin_unlock_irqrestore(&reply->card->lock, flags);
872 lcs_send_lancmd(struct lcs_card *card, struct lcs_buffer *buffer,
873 void (*reply_callback)(struct lcs_card *, struct lcs_cmd *))
875 struct lcs_reply *reply;
877 struct timer_list timer;
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);
888 reply->callback = reply_callback;
890 spin_lock_irqsave(&card->lock, flags);
891 list_add_tail(&reply->list, &card->lancmd_waiters);
892 spin_unlock_irqrestore(&card->lock, flags);
894 buffer->callback = lcs_release_buffer;
895 rc = lcs_ready_buffer(&card->write, buffer);
898 init_timer_on_stack(&timer);
899 timer.function = lcs_lancmd_timeout;
900 timer.data = (unsigned long) reply;
901 timer.expires = jiffies + HZ*card->lancmd_timeout;
903 wait_event(reply->wait_q, reply->received);
904 del_timer_sync(&timer);
905 LCS_DBF_TEXT_(4, trace, "rc:%d",reply->rc);
907 lcs_put_reply(reply);
908 return rc ? -EIO : 0;
912 * LCS startup command
915 lcs_send_startup(struct lcs_card *card, __u8 initiator)
917 struct lcs_buffer *buffer;
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);
930 * LCS shutdown command
933 lcs_send_shutdown(struct lcs_card *card)
935 struct lcs_buffer *buffer;
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);
947 * LCS lanstat command
950 __lcs_lanstat_cb(struct lcs_card *card, struct lcs_cmd *cmd)
952 LCS_DBF_TEXT(2, trace, "statcb");
953 memcpy(card->mac, cmd->cmd.lcs_lanstat_cmd.mac_addr, LCS_MAC_LENGTH);
957 lcs_send_lanstat(struct lcs_card *card)
959 struct lcs_buffer *buffer;
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);
974 * send stoplan command
977 lcs_send_stoplan(struct lcs_card *card, __u8 initiator)
979 struct lcs_buffer *buffer;
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);
993 * send startlan command
996 __lcs_send_startlan_cb(struct lcs_card *card, struct lcs_cmd *cmd)
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;
1004 lcs_send_startlan(struct lcs_card *card, __u8 initiator)
1006 struct lcs_buffer *buffer;
1007 struct lcs_cmd *cmd;
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);
1019 #ifdef CONFIG_IP_MULTICAST
1021 * send setipm command (Multicast)
1024 lcs_send_setipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list)
1026 struct lcs_buffer *buffer;
1027 struct lcs_cmd *cmd;
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);
1045 * send delipm command (Multicast)
1048 lcs_send_delipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list)
1050 struct lcs_buffer *buffer;
1051 struct lcs_cmd *cmd;
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);
1069 * check if multicast is supported by LCS
1072 __lcs_check_multicast_cb(struct lcs_card *card, struct lcs_cmd *cmd)
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;
1082 lcs_check_multicast_support(struct lcs_card *card)
1084 struct lcs_buffer *buffer;
1085 struct lcs_cmd *cmd;
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);
1100 pr_err("Query IPAssist failed. Assuming unsupported!\n");
1103 if (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT)
1109 * set or del multicast address on LCS card
1112 lcs_fix_multicast_list(struct lcs_card *card)
1114 struct list_head failed_list;
1115 struct lcs_ipm_list *ipm, *tmp;
1116 unsigned long flags;
1119 LCS_DBF_TEXT(4,trace, "fixipm");
1120 INIT_LIST_HEAD(&failed_list);
1121 spin_lock_irqsave(&card->ipm_lock, flags);
1123 list_for_each_entry_safe(ipm, tmp, &card->ipm_list, list){
1124 switch (ipm->ipm_state) {
1125 case LCS_IPM_STATE_SET_REQUIRED:
1126 /* del from ipm_list so noone else can tamper with
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);
1133 pr_info("Adding multicast address failed."
1134 " Table possibly full!\n");
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);
1140 ipm->ipm_state = LCS_IPM_STATE_ON_CARD;
1141 /* re-insert into ipm_list */
1142 list_add_tail(&ipm->list, &card->ipm_list);
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);
1152 case LCS_IPM_STATE_ON_CARD:
1156 /* re-insert all entries from the failed_list into ipm_list */
1157 list_for_each_entry_safe(ipm, tmp, &failed_list, list)
1158 list_move_tail(&ipm->list, &card->ipm_list);
1160 spin_unlock_irqrestore(&card->ipm_lock, flags);
1164 * get mac address for the relevant Multicast address
1167 lcs_get_mac_for_ipm(__be32 ipm, char *mac, struct net_device *dev)
1169 LCS_DBF_TEXT(4,trace, "getmac");
1170 if (dev->type == ARPHRD_IEEE802_TR)
1171 ip_tr_mc_map(ipm, mac);
1173 ip_eth_mc_map(ipm, mac);
1177 * function called by net device to handle multicast address relevant things
1180 lcs_remove_mc_addresses(struct lcs_card *card, struct in_device *in4_dev)
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];
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);
1192 for (im4 = rcu_dereference(in4_dev->mc_list);
1193 im4 != NULL; im4 = rcu_dereference(im4->next_rcu)) {
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) )
1201 ipm->ipm_state = LCS_IPM_STATE_DEL_REQUIRED;
1203 spin_unlock_irqrestore(&card->ipm_lock, flags);
1206 static inline struct lcs_ipm_list *
1207 lcs_check_addr_entry(struct lcs_card *card, struct ip_mc_list *im4, char *buf)
1209 struct lcs_ipm_list *tmp, *ipm = NULL;
1210 struct list_head *l;
1211 unsigned long flags;
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) ) {
1224 spin_unlock_irqrestore(&card->ipm_lock, flags);
1229 lcs_set_mc_addresses(struct lcs_card *card, struct in_device *in4_dev)
1232 struct ip_mc_list *im4;
1233 struct lcs_ipm_list *ipm;
1234 char buf[MAX_ADDR_LEN];
1235 unsigned long flags;
1237 LCS_DBF_TEXT(4, trace, "setmclst");
1238 for (im4 = rcu_dereference(in4_dev->mc_list); im4 != NULL;
1239 im4 = rcu_dereference(im4->next_rcu)) {
1240 lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev);
1241 ipm = lcs_check_addr_entry(card, im4, buf);
1243 continue; /* Address already in list. */
1244 ipm = kzalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC);
1246 pr_info("Not enough memory to add"
1247 " new multicast entry!\n");
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);
1254 LCS_DBF_HEX(2,trace,&ipm->ipm.ip_addr,4);
1255 list_add(&ipm->list, &card->ipm_list);
1256 spin_unlock_irqrestore(&card->ipm_lock, flags);
1261 lcs_register_mc_addresses(void *data)
1263 struct lcs_card *card;
1264 struct in_device *in4_dev;
1266 card = (struct lcs_card *) data;
1268 if (!lcs_do_run_thread(card, LCS_SET_MC_THREAD))
1270 LCS_DBF_TEXT(4, trace, "regmulti");
1272 in4_dev = in_dev_get(card->dev);
1273 if (in4_dev == NULL)
1276 lcs_remove_mc_addresses(card,in4_dev);
1277 lcs_set_mc_addresses(card, in4_dev);
1279 in_dev_put(in4_dev);
1281 netif_carrier_off(card->dev);
1282 netif_tx_disable(card->dev);
1283 wait_event(card->write.wait_q,
1284 (card->write.state != LCS_CH_STATE_RUNNING));
1285 lcs_fix_multicast_list(card);
1286 if (card->state == DEV_STATE_UP) {
1287 netif_carrier_on(card->dev);
1288 netif_wake_queue(card->dev);
1291 lcs_clear_thread_running_bit(card, LCS_SET_MC_THREAD);
1294 #endif /* CONFIG_IP_MULTICAST */
1297 * function called by net device to
1298 * handle multicast address relevant things
1301 lcs_set_multicast_list(struct net_device *dev)
1303 #ifdef CONFIG_IP_MULTICAST
1304 struct lcs_card *card;
1306 LCS_DBF_TEXT(4, trace, "setmulti");
1307 card = (struct lcs_card *) dev->ml_priv;
1309 if (!lcs_set_thread_start_bit(card, LCS_SET_MC_THREAD))
1310 schedule_work(&card->kernel_thread_starter);
1311 #endif /* CONFIG_IP_MULTICAST */
1315 lcs_check_irb_error(struct ccw_device *cdev, struct irb *irb)
1320 switch (PTR_ERR(irb)) {
1322 dev_warn(&cdev->dev,
1323 "An I/O-error occurred on the LCS device\n");
1324 LCS_DBF_TEXT(2, trace, "ckirberr");
1325 LCS_DBF_TEXT_(2, trace, " rc%d", -EIO);
1328 dev_warn(&cdev->dev,
1329 "A command timed out on the LCS device\n");
1330 LCS_DBF_TEXT(2, trace, "ckirberr");
1331 LCS_DBF_TEXT_(2, trace, " rc%d", -ETIMEDOUT);
1334 dev_warn(&cdev->dev,
1335 "An error occurred on the LCS device, rc=%ld\n",
1337 LCS_DBF_TEXT(2, trace, "ckirberr");
1338 LCS_DBF_TEXT(2, trace, " rc???");
1340 return PTR_ERR(irb);
1344 lcs_get_problem(struct ccw_device *cdev, struct irb *irb)
1349 sense = (char *) irb->ecw;
1350 cstat = irb->scsw.cmd.cstat;
1351 dstat = irb->scsw.cmd.dstat;
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");
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");
1365 if (sense[LCS_SENSE_BYTE_0] &
1366 LCS_SENSE_CMD_REJECT) {
1367 LCS_DBF_TEXT(2, trace, "CMDREJ");
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");
1377 LCS_DBF_TEXT(2, trace, "DGENCHK");
1384 lcs_schedule_recovery(struct lcs_card *card)
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);
1392 * IRQ Handler for LCS channels
1395 lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
1397 struct lcs_card *card;
1398 struct lcs_channel *channel;
1402 kstat_cpu(smp_processor_id()).irqs[IOINT_LCS]++;
1403 if (lcs_check_irb_error(cdev, irb))
1406 card = CARD_FROM_DEV(cdev);
1407 if (card->read.ccwdev == cdev)
1408 channel = &card->read;
1410 channel = &card->write;
1412 cstat = irb->scsw.cmd.cstat;
1413 dstat = irb->scsw.cmd.dstat;
1414 LCS_DBF_TEXT_(5, trace, "Rint%s", dev_name(&cdev->dev));
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);
1420 /* Check for channel and device errors presented */
1421 rc = lcs_get_problem(cdev, irb);
1422 if (rc || (dstat & DEV_STAT_UNIT_EXCEP)) {
1423 dev_warn(&cdev->dev,
1424 "The LCS device stopped because of an error,"
1425 " dstat=0x%X, cstat=0x%X \n",
1428 channel->state = LCS_CH_STATE_ERROR;
1431 if (channel->state == LCS_CH_STATE_ERROR) {
1432 lcs_schedule_recovery(card);
1433 wake_up(&card->wait_q);
1436 /* How far in the ccw chain have we processed? */
1437 if ((channel->state != LCS_CH_STATE_INIT) &&
1438 (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) &&
1439 (irb->scsw.cmd.cpa != 0)) {
1440 index = (struct ccw1 *) __va((addr_t) irb->scsw.cmd.cpa)
1442 if ((irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) ||
1443 (irb->scsw.cmd.cstat & SCHN_STAT_PCI))
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);
1450 (channel->io_idx + 1) & (LCS_NUM_BUFFS - 1);
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))
1457 /* Mark channel as stopped. */
1458 channel->state = LCS_CH_STATE_STOPPED;
1459 else if (irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED)
1460 /* CCW execution stopped on a suspend bit. */
1461 channel->state = LCS_CH_STATE_SUSPENDED;
1462 if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1463 if (irb->scsw.cmd.cc != 0) {
1464 ccw_device_halt(channel->ccwdev, (addr_t) channel);
1467 /* The channel has been stopped by halt_IO. */
1468 channel->state = LCS_CH_STATE_HALTED;
1470 if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC)
1471 channel->state = LCS_CH_STATE_CLEARED;
1472 /* Do the rest in the tasklet. */
1473 tasklet_schedule(&channel->irq_tasklet);
1477 * Tasklet for IRQ handler
1480 lcs_tasklet(unsigned long data)
1482 unsigned long flags;
1483 struct lcs_channel *channel;
1484 struct lcs_buffer *iob;
1488 channel = (struct lcs_channel *) data;
1489 LCS_DBF_TEXT_(5, trace, "tlet%s", dev_name(&channel->ccwdev->dev));
1491 /* Check for processed buffers. */
1493 buf_idx = channel->buf_idx;
1494 while (iob[buf_idx].state == LCS_BUF_STATE_PROCESSED) {
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);
1500 channel->buf_idx = buf_idx;
1502 if (channel->state == LCS_CH_STATE_STOPPED)
1503 // FIXME: what if rc != 0 ??
1504 rc = lcs_start_channel(channel);
1505 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1506 if (channel->state == LCS_CH_STATE_SUSPENDED &&
1507 channel->iob[channel->io_idx].state == LCS_BUF_STATE_READY) {
1508 // FIXME: what if rc != 0 ??
1509 rc = __lcs_resume_channel(channel);
1511 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1513 /* Something happened on the channel. Wake up waiters. */
1514 wake_up(&channel->wait_q);
1518 * Finish current tx buffer and make it ready for transmit.
1521 __lcs_emit_txbuffer(struct lcs_card *card)
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;
1532 * Callback for finished tx buffers.
1535 lcs_txbuffer_cb(struct lcs_channel *channel, struct lcs_buffer *buffer)
1537 struct lcs_card *card;
1539 LCS_DBF_TEXT(5, trace, "txbuffcb");
1540 /* Put buffer back to pool. */
1541 lcs_release_buffer(channel, buffer);
1542 card = container_of(channel, struct lcs_card, write);
1543 if (netif_queue_stopped(card->dev) && netif_carrier_ok(card->dev))
1544 netif_wake_queue(card->dev);
1545 spin_lock(&card->lock);
1547 if (card->tx_emitted <= 0 && card->tx_buffer != NULL)
1549 * Last running tx buffer has finished. Submit partially
1550 * filled current buffer.
1552 __lcs_emit_txbuffer(card);
1553 spin_unlock(&card->lock);
1557 * Packet transmit function called by network stack
1560 __lcs_start_xmit(struct lcs_card *card, struct sk_buff *skb,
1561 struct net_device *dev)
1563 struct lcs_header *header;
1564 int rc = NETDEV_TX_OK;
1566 LCS_DBF_TEXT(5, trace, "hardxmit");
1568 card->stats.tx_dropped++;
1569 card->stats.tx_errors++;
1570 return NETDEV_TX_OK;
1572 if (card->state != DEV_STATE_UP) {
1574 card->stats.tx_dropped++;
1575 card->stats.tx_errors++;
1576 card->stats.tx_carrier_errors++;
1577 return NETDEV_TX_OK;
1579 if (skb->protocol == htons(ETH_P_IPV6)) {
1581 return NETDEV_TX_OK;
1583 netif_stop_queue(card->dev);
1584 spin_lock(&card->lock);
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++;
1595 rc = NETDEV_TX_BUSY;
1598 card->tx_buffer->callback = lcs_txbuffer_cb;
1599 card->tx_buffer->count = 0;
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;
1607 skb_copy_from_linear_data(skb, header + 1, skb->len);
1608 spin_unlock(&card->lock);
1609 card->stats.tx_bytes += skb->len;
1610 card->stats.tx_packets++;
1612 netif_wake_queue(card->dev);
1613 spin_lock(&card->lock);
1614 if (card->tx_emitted <= 0 && card->tx_buffer != NULL)
1615 /* If this is the first tx buffer emit it immediately. */
1616 __lcs_emit_txbuffer(card);
1618 spin_unlock(&card->lock);
1623 lcs_start_xmit(struct sk_buff *skb, struct net_device *dev)
1625 struct lcs_card *card;
1628 LCS_DBF_TEXT(5, trace, "pktxmit");
1629 card = (struct lcs_card *) dev->ml_priv;
1630 rc = __lcs_start_xmit(card, skb, dev);
1635 * send startlan and lanstat command to make LCS device ready
1638 lcs_startlan_auto(struct lcs_card *card)
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);
1651 card->lan_type = LCS_FRAME_TYPE_TR;
1652 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1657 card->lan_type = LCS_FRAME_TYPE_FDDI;
1658 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1666 lcs_startlan(struct lcs_card *card)
1670 LCS_DBF_TEXT(2, trace, "startlan");
1672 if (card->portno != LCS_INVALID_PORT_NO) {
1673 if (card->lan_type == LCS_FRAME_TYPE_AUTO)
1674 rc = lcs_startlan_auto(card);
1676 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1678 for (i = 0; i <= 16; i++) {
1680 if (card->lan_type != LCS_FRAME_TYPE_AUTO)
1681 rc = lcs_send_startlan(card,
1682 LCS_INITIATOR_TCPIP);
1684 /* autodetecting lan type */
1685 rc = lcs_startlan_auto(card);
1691 return lcs_send_lanstat(card);
1696 * LCS detect function
1697 * setup channels and make them I/O ready
1700 lcs_detect(struct lcs_card *card)
1704 LCS_DBF_TEXT(2, setup, "lcsdetct");
1705 /* start/reset card */
1707 netif_stop_queue(card->dev);
1708 rc = lcs_stop_channels(card);
1710 rc = lcs_start_channels(card);
1712 rc = lcs_send_startup(card, LCS_INITIATOR_TCPIP);
1714 rc = lcs_startlan(card);
1718 card->state = DEV_STATE_UP;
1720 card->state = DEV_STATE_DOWN;
1721 card->write.state = LCS_CH_STATE_INIT;
1722 card->read.state = LCS_CH_STATE_INIT;
1731 lcs_stopcard(struct lcs_card *card)
1735 LCS_DBF_TEXT(3, setup, "stopcard");
1737 if (card->read.state != LCS_CH_STATE_STOPPED &&
1738 card->write.state != LCS_CH_STATE_STOPPED &&
1739 card->read.state != LCS_CH_STATE_ERROR &&
1740 card->write.state != LCS_CH_STATE_ERROR &&
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);
1746 rc = lcs_stop_channels(card);
1747 card->state = DEV_STATE_DOWN;
1753 * Kernel Thread helper functions for LGW initiated commands
1756 lcs_start_kernel_thread(struct work_struct *work)
1758 struct lcs_card *card = container_of(work, struct lcs_card, kernel_thread_starter);
1759 LCS_DBF_TEXT(5, trace, "krnthrd");
1760 if (lcs_do_start_thread(card, LCS_RECOVERY_THREAD))
1761 kthread_run(lcs_recovery, card, "lcs_recover");
1762 #ifdef CONFIG_IP_MULTICAST
1763 if (lcs_do_start_thread(card, LCS_SET_MC_THREAD))
1764 kthread_run(lcs_register_mc_addresses, card, "regipm");
1769 * Process control frames.
1772 lcs_get_control(struct lcs_card *card, struct lcs_cmd *cmd)
1774 LCS_DBF_TEXT(5, trace, "getctrl");
1775 if (cmd->initiator == LCS_INITIATOR_LGW) {
1776 switch(cmd->cmd_code) {
1777 case LCS_CMD_STARTUP:
1778 case LCS_CMD_STARTLAN:
1779 lcs_schedule_recovery(card);
1781 case LCS_CMD_STOPLAN:
1782 pr_warning("Stoplan for %s initiated by LGW.\n",
1785 netif_carrier_off(card->dev);
1788 LCS_DBF_TEXT(5, trace, "noLGWcmd");
1792 lcs_notify_lancmd_waiters(card, cmd);
1796 * Unpack network packet.
1799 lcs_get_skb(struct lcs_card *card, char *skb_data, unsigned int skb_len)
1801 struct sk_buff *skb;
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. */
1809 skb = dev_alloc_skb(skb_len);
1811 dev_err(&card->dev->dev,
1812 " Allocating a socket buffer to interface %s failed\n",
1814 card->stats.rx_dropped++;
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++;
1821 if (skb->protocol == htons(ETH_P_802_2))
1822 *((__u32 *)skb->cb) = ++card->pkt_seq;
1827 * LCS main routine to get packets and lancmd replies from the buffers
1830 lcs_get_frames_cb(struct lcs_channel *channel, struct lcs_buffer *buffer)
1832 struct lcs_card *card;
1833 struct lcs_header *lcs_hdr;
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");
1842 card = container_of(channel, struct lcs_card, read);
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++;
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));
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);
1872 /* The buffer is now empty. Make it ready again. */
1873 lcs_ready_buffer(&card->read, buffer);
1877 * get network statistics for ifconfig and other user programs
1879 static struct net_device_stats *
1880 lcs_getstats(struct net_device *dev)
1882 struct lcs_card *card;
1884 LCS_DBF_TEXT(4, trace, "netstats");
1885 card = (struct lcs_card *) dev->ml_priv;
1886 return &card->stats;
1891 * This function will be called by user doing ifconfig xxx down
1894 lcs_stop_device(struct net_device *dev)
1896 struct lcs_card *card;
1899 LCS_DBF_TEXT(2, trace, "stopdev");
1900 card = (struct lcs_card *) dev->ml_priv;
1901 netif_carrier_off(dev);
1902 netif_tx_disable(dev);
1903 dev->flags &= ~IFF_UP;
1904 wait_event(card->write.wait_q,
1905 (card->write.state != LCS_CH_STATE_RUNNING));
1906 rc = lcs_stopcard(card);
1908 dev_err(&card->dev->dev,
1909 " Shutting down the LCS device failed\n ");
1914 * start lcs device and make it runnable
1915 * This function will be called by user doing ifconfig xxx up
1918 lcs_open_device(struct net_device *dev)
1920 struct lcs_card *card;
1923 LCS_DBF_TEXT(2, trace, "opendev");
1924 card = (struct lcs_card *) dev->ml_priv;
1925 /* initialize statistics */
1926 rc = lcs_detect(card);
1928 pr_err("Error in opening device!\n");
1931 dev->flags |= IFF_UP;
1932 netif_carrier_on(dev);
1933 netif_wake_queue(dev);
1934 card->state = DEV_STATE_UP;
1940 * show function for portno called by cat or similar things
1943 lcs_portno_show (struct device *dev, struct device_attribute *attr, char *buf)
1945 struct lcs_card *card;
1947 card = dev_get_drvdata(dev);
1952 return sprintf(buf, "%d\n", card->portno);
1956 * store the value which is piped to file portno
1959 lcs_portno_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1961 struct lcs_card *card;
1964 card = dev_get_drvdata(dev);
1969 sscanf(buf, "%u", &value);
1970 /* TODO: sanity checks */
1971 card->portno = value;
1977 static DEVICE_ATTR(portno, 0644, lcs_portno_show, lcs_portno_store);
1979 const char *lcs_type[] = {
1984 "unknown channel type",
1985 "unsupported channel type",
1989 lcs_type_show(struct device *dev, struct device_attribute *attr, char *buf)
1991 struct ccwgroup_device *cgdev;
1993 cgdev = to_ccwgroupdev(dev);
1997 return sprintf(buf, "%s\n", lcs_type[cgdev->cdev[0]->id.driver_info]);
2000 static DEVICE_ATTR(type, 0444, lcs_type_show, NULL);
2003 lcs_timeout_show(struct device *dev, struct device_attribute *attr, char *buf)
2005 struct lcs_card *card;
2007 card = dev_get_drvdata(dev);
2009 return card ? sprintf(buf, "%u\n", card->lancmd_timeout) : 0;
2013 lcs_timeout_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
2015 struct lcs_card *card;
2018 card = dev_get_drvdata(dev);
2023 sscanf(buf, "%u", &value);
2024 /* TODO: sanity checks */
2025 card->lancmd_timeout = value;
2031 static DEVICE_ATTR(lancmd_timeout, 0644, lcs_timeout_show, lcs_timeout_store);
2034 lcs_dev_recover_store(struct device *dev, struct device_attribute *attr,
2035 const char *buf, size_t count)
2037 struct lcs_card *card = dev_get_drvdata(dev);
2043 if (card->state != DEV_STATE_UP)
2045 i = simple_strtoul(buf, &tmp, 16);
2047 lcs_schedule_recovery(card);
2051 static DEVICE_ATTR(recover, 0200, NULL, lcs_dev_recover_store);
2053 static struct attribute * lcs_attrs[] = {
2054 &dev_attr_portno.attr,
2055 &dev_attr_type.attr,
2056 &dev_attr_lancmd_timeout.attr,
2057 &dev_attr_recover.attr,
2061 static struct attribute_group lcs_attr_group = {
2066 * lcs_probe_device is called on establishing a new ccwgroup_device.
2069 lcs_probe_device(struct ccwgroup_device *ccwgdev)
2071 struct lcs_card *card;
2074 if (!get_device(&ccwgdev->dev))
2077 LCS_DBF_TEXT(2, setup, "add_dev");
2078 card = lcs_alloc_card();
2080 LCS_DBF_TEXT_(2, setup, " rc%d", -ENOMEM);
2081 put_device(&ccwgdev->dev);
2084 ret = sysfs_create_group(&ccwgdev->dev.kobj, &lcs_attr_group);
2086 lcs_free_card(card);
2087 put_device(&ccwgdev->dev);
2090 dev_set_drvdata(&ccwgdev->dev, card);
2091 ccwgdev->cdev[0]->handler = lcs_irq;
2092 ccwgdev->cdev[1]->handler = lcs_irq;
2093 card->gdev = ccwgdev;
2094 INIT_WORK(&card->kernel_thread_starter, lcs_start_kernel_thread);
2095 card->thread_start_mask = 0;
2096 card->thread_allowed_mask = 0;
2097 card->thread_running_mask = 0;
2102 lcs_register_netdev(struct ccwgroup_device *ccwgdev)
2104 struct lcs_card *card;
2106 LCS_DBF_TEXT(2, setup, "regnetdv");
2107 card = dev_get_drvdata(&ccwgdev->dev);
2108 if (card->dev->reg_state != NETREG_UNINITIALIZED)
2110 SET_NETDEV_DEV(card->dev, &ccwgdev->dev);
2111 return register_netdev(card->dev);
2115 * lcs_new_device will be called by setting the group device online.
2117 static const struct net_device_ops lcs_netdev_ops = {
2118 .ndo_open = lcs_open_device,
2119 .ndo_stop = lcs_stop_device,
2120 .ndo_get_stats = lcs_getstats,
2121 .ndo_start_xmit = lcs_start_xmit,
2124 static const struct net_device_ops lcs_mc_netdev_ops = {
2125 .ndo_open = lcs_open_device,
2126 .ndo_stop = lcs_stop_device,
2127 .ndo_get_stats = lcs_getstats,
2128 .ndo_start_xmit = lcs_start_xmit,
2129 .ndo_set_multicast_list = lcs_set_multicast_list,
2133 lcs_new_device(struct ccwgroup_device *ccwgdev)
2135 struct lcs_card *card;
2136 struct net_device *dev=NULL;
2137 enum lcs_dev_states recover_state;
2140 card = dev_get_drvdata(&ccwgdev->dev);
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];
2149 recover_state = card->state;
2150 rc = ccw_device_set_online(card->read.ccwdev);
2153 rc = ccw_device_set_online(card->write.ccwdev);
2157 LCS_DBF_TEXT(3, setup, "lcsnewdv");
2159 lcs_setup_card(card);
2160 rc = lcs_detect(card);
2162 LCS_DBF_TEXT(2, setup, "dtctfail");
2163 dev_err(&card->dev->dev,
2164 "Detecting a network adapter for LCS devices"
2165 " failed with rc=%d (0x%x)\n", rc, rc);
2170 LCS_DBF_TEXT(2, setup, "samedev");
2171 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
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);
2182 case LCS_FRAME_TYPE_TR:
2183 card->lan_type_trans = tr_type_trans;
2184 dev = alloc_trdev(0);
2188 case LCS_FRAME_TYPE_FDDI:
2189 card->lan_type_trans = fddi_type_trans;
2190 dev = alloc_fddidev(0);
2194 LCS_DBF_TEXT(3, setup, "errinit");
2195 pr_err(" Initialization failed\n");
2201 card->dev->ml_priv = card;
2202 card->dev->netdev_ops = &lcs_netdev_ops;
2203 memcpy(card->dev->dev_addr, card->mac, LCS_MAC_LENGTH);
2204 #ifdef CONFIG_IP_MULTICAST
2205 if (!lcs_check_multicast_support(card))
2206 card->dev->netdev_ops = &lcs_mc_netdev_ops;
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;
2213 netif_carrier_on(card->dev);
2214 netif_wake_queue(card->dev);
2215 card->state = DEV_STATE_UP;
2220 if (lcs_register_netdev(ccwgdev) != 0)
2223 /* Print out supported assists: IPv6 */
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");
2227 /* Print out supported assist: Multicast */
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");
2234 ccw_device_set_offline(card->write.ccwdev);
2236 ccw_device_set_offline(card->read.ccwdev);
2242 * lcs_shutdown_device, called when setting the group device offline.
2245 __lcs_shutdown_device(struct ccwgroup_device *ccwgdev, int recovery_mode)
2247 struct lcs_card *card;
2248 enum lcs_dev_states recover_state;
2251 LCS_DBF_TEXT(3, setup, "shtdndev");
2252 card = dev_get_drvdata(&ccwgdev->dev);
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;
2260 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
2261 recover_state = card->state;
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;
2275 lcs_shutdown_device(struct ccwgroup_device *ccwgdev)
2277 return __lcs_shutdown_device(ccwgdev, 0);
2281 * drive lcs recovery after startup and startlan initiated by Lan Gateway
2284 lcs_recovery(void *ptr)
2286 struct lcs_card *card;
2287 struct ccwgroup_device *gdev;
2290 card = (struct lcs_card *) ptr;
2292 LCS_DBF_TEXT(4, trace, "recover1");
2293 if (!lcs_do_run_thread(card, LCS_RECOVERY_THREAD))
2295 LCS_DBF_TEXT(4, trace, "recover2");
2297 dev_warn(&gdev->dev,
2298 "A recovery process has been started for the LCS device\n");
2299 rc = __lcs_shutdown_device(gdev, 1);
2300 rc = lcs_new_device(gdev);
2302 pr_info("Device %s successfully recovered!\n",
2305 pr_info("Device %s could not be recovered!\n",
2307 lcs_clear_thread_running_bit(card, LCS_RECOVERY_THREAD);
2312 * lcs_remove_device, free buffers and card
2315 lcs_remove_device(struct ccwgroup_device *ccwgdev)
2317 struct lcs_card *card;
2319 card = dev_get_drvdata(&ccwgdev->dev);
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);
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);
2336 static int lcs_pm_suspend(struct lcs_card *card)
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);
2347 static int lcs_pm_resume(struct lcs_card *card)
2351 if (card->state == DEV_STATE_RECOVER)
2352 rc = lcs_new_device(card->gdev);
2354 netif_device_attach(card->dev);
2356 dev_warn(&card->gdev->dev, "The lcs device driver "
2357 "failed to recover the device\n");
2362 static int lcs_prepare(struct ccwgroup_device *gdev)
2367 static void lcs_complete(struct ccwgroup_device *gdev)
2372 static int lcs_freeze(struct ccwgroup_device *gdev)
2374 struct lcs_card *card = dev_get_drvdata(&gdev->dev);
2375 return lcs_pm_suspend(card);
2378 static int lcs_thaw(struct ccwgroup_device *gdev)
2380 struct lcs_card *card = dev_get_drvdata(&gdev->dev);
2381 return lcs_pm_resume(card);
2384 static int lcs_restore(struct ccwgroup_device *gdev)
2386 struct lcs_card *card = dev_get_drvdata(&gdev->dev);
2387 return lcs_pm_resume(card);
2390 static struct ccw_device_id lcs_ids[] = {
2391 {CCW_DEVICE(0x3088, 0x08), .driver_info = lcs_channel_type_parallel},
2392 {CCW_DEVICE(0x3088, 0x1f), .driver_info = lcs_channel_type_2216},
2393 {CCW_DEVICE(0x3088, 0x60), .driver_info = lcs_channel_type_osa2},
2396 MODULE_DEVICE_TABLE(ccw, lcs_ids);
2398 static struct ccw_driver lcs_ccw_driver = {
2399 .owner = THIS_MODULE,
2402 .probe = ccwgroup_probe_ccwdev,
2403 .remove = ccwgroup_remove_ccwdev,
2407 * LCS ccwgroup driver registration
2409 static struct ccwgroup_driver lcs_group_driver = {
2410 .owner = THIS_MODULE,
2413 .driver_id = 0xD3C3E2,
2414 .probe = lcs_probe_device,
2415 .remove = lcs_remove_device,
2416 .set_online = lcs_new_device,
2417 .set_offline = lcs_shutdown_device,
2418 .prepare = lcs_prepare,
2419 .complete = lcs_complete,
2420 .freeze = lcs_freeze,
2422 .restore = lcs_restore,
2426 lcs_driver_group_store(struct device_driver *ddrv, const char *buf,
2430 err = ccwgroup_create_from_string(lcs_root_dev,
2431 lcs_group_driver.driver_id,
2432 &lcs_ccw_driver, 2, buf);
2433 return err ? err : count;
2436 static DRIVER_ATTR(group, 0200, NULL, lcs_driver_group_store);
2438 static struct attribute *lcs_group_attrs[] = {
2439 &driver_attr_group.attr,
2443 static struct attribute_group lcs_group_attr_group = {
2444 .attrs = lcs_group_attrs,
2447 static const struct attribute_group *lcs_group_attr_groups[] = {
2448 &lcs_group_attr_group,
2453 * LCS Module/Kernel initialization function
2456 __init lcs_init_module(void)
2460 pr_info("Loading %s\n", version);
2461 rc = lcs_register_debug_facility();
2462 LCS_DBF_TEXT(0, setup, "lcsinit");
2465 lcs_root_dev = root_device_register("lcs");
2466 rc = IS_ERR(lcs_root_dev) ? PTR_ERR(lcs_root_dev) : 0;
2469 rc = ccw_driver_register(&lcs_ccw_driver);
2472 lcs_group_driver.driver.groups = lcs_group_attr_groups;
2473 rc = ccwgroup_driver_register(&lcs_group_driver);
2479 ccw_driver_unregister(&lcs_ccw_driver);
2481 root_device_unregister(lcs_root_dev);
2483 lcs_unregister_debug_facility();
2485 pr_err("Initializing the lcs device driver failed\n");
2491 * LCS module cleanup function
2494 __exit lcs_cleanup_module(void)
2496 pr_info("Terminating lcs module.\n");
2497 LCS_DBF_TEXT(0, trace, "cleanup");
2498 driver_remove_file(&lcs_group_driver.driver,
2499 &driver_attr_group);
2500 ccwgroup_driver_unregister(&lcs_group_driver);
2501 ccw_driver_unregister(&lcs_ccw_driver);
2502 root_device_unregister(lcs_root_dev);
2503 lcs_unregister_debug_facility();
2506 module_init(lcs_init_module);
2507 module_exit(lcs_cleanup_module);
2509 MODULE_AUTHOR("Frank Pavlic <fpavlic@de.ibm.com>");
2510 MODULE_LICENSE("GPL");