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/module.h>
31 #include <linux/netdevice.h>
32 #include <linux/etherdevice.h>
33 #include <linux/fddidevice.h>
34 #include <linux/inetdevice.h>
36 #include <linux/igmp.h>
37 #include <linux/delay.h>
38 #include <linux/kthread.h>
39 #include <linux/slab.h>
43 #include <asm/debug.h>
44 #include <asm/idals.h>
45 #include <asm/timex.h>
46 #include <linux/device.h>
47 #include <asm/ccwgroup.h>
52 #if !defined(CONFIG_ETHERNET) && !defined(CONFIG_FDDI)
53 #error Cannot compile lcs.c without some net devices switched on.
57 * initialization string for output
60 static char version[] __initdata = "LCS driver";
63 * the root device for lcs group devices
65 static struct device *lcs_root_dev;
70 static void lcs_tasklet(unsigned long);
71 static void lcs_start_kernel_thread(struct work_struct *);
72 static void lcs_get_frames_cb(struct lcs_channel *, struct lcs_buffer *);
73 #ifdef CONFIG_IP_MULTICAST
74 static int lcs_send_delipm(struct lcs_card *, struct lcs_ipm_list *);
75 #endif /* CONFIG_IP_MULTICAST */
76 static int lcs_recovery(void *ptr);
79 * Debug Facility Stuff
81 static char debug_buffer[255];
82 static debug_info_t *lcs_dbf_setup;
83 static debug_info_t *lcs_dbf_trace;
86 * LCS Debug Facility functions
89 lcs_unregister_debug_facility(void)
92 debug_unregister(lcs_dbf_setup);
94 debug_unregister(lcs_dbf_trace);
98 lcs_register_debug_facility(void)
100 lcs_dbf_setup = debug_register("lcs_setup", 2, 1, 8);
101 lcs_dbf_trace = debug_register("lcs_trace", 4, 1, 8);
102 if (lcs_dbf_setup == NULL || lcs_dbf_trace == NULL) {
103 pr_err("Not enough memory for debug facility.\n");
104 lcs_unregister_debug_facility();
107 debug_register_view(lcs_dbf_setup, &debug_hex_ascii_view);
108 debug_set_level(lcs_dbf_setup, 2);
109 debug_register_view(lcs_dbf_trace, &debug_hex_ascii_view);
110 debug_set_level(lcs_dbf_trace, 2);
115 * Allocate io buffers.
118 lcs_alloc_channel(struct lcs_channel *channel)
122 LCS_DBF_TEXT(2, setup, "ichalloc");
123 for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
124 /* alloc memory fo iobuffer */
125 channel->iob[cnt].data =
126 kzalloc(LCS_IOBUFFERSIZE, GFP_DMA | GFP_KERNEL);
127 if (channel->iob[cnt].data == NULL)
129 channel->iob[cnt].state = LCS_BUF_STATE_EMPTY;
131 if (cnt < LCS_NUM_BUFFS) {
132 /* Not all io buffers could be allocated. */
133 LCS_DBF_TEXT(2, setup, "echalloc");
135 kfree(channel->iob[cnt].data);
145 lcs_free_channel(struct lcs_channel *channel)
149 LCS_DBF_TEXT(2, setup, "ichfree");
150 for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
151 kfree(channel->iob[cnt].data);
152 channel->iob[cnt].data = NULL;
160 lcs_cleanup_channel(struct lcs_channel *channel)
162 LCS_DBF_TEXT(3, setup, "cleanch");
163 /* Kill write channel tasklets. */
164 tasklet_kill(&channel->irq_tasklet);
165 /* Free channel buffers. */
166 lcs_free_channel(channel);
170 * LCS free memory for card and channels.
173 lcs_free_card(struct lcs_card *card)
175 LCS_DBF_TEXT(2, setup, "remcard");
176 LCS_DBF_HEX(2, setup, &card, sizeof(void*));
181 * LCS alloc memory for card and channels
183 static struct lcs_card *
186 struct lcs_card *card;
189 LCS_DBF_TEXT(2, setup, "alloclcs");
191 card = kzalloc(sizeof(struct lcs_card), GFP_KERNEL | GFP_DMA);
194 card->lan_type = LCS_FRAME_TYPE_AUTO;
196 card->lancmd_timeout = LCS_LANCMD_TIMEOUT_DEFAULT;
197 /* Allocate io buffers for the read channel. */
198 rc = lcs_alloc_channel(&card->read);
200 LCS_DBF_TEXT(2, setup, "iccwerr");
204 /* Allocate io buffers for the write channel. */
205 rc = lcs_alloc_channel(&card->write);
207 LCS_DBF_TEXT(2, setup, "iccwerr");
208 lcs_cleanup_channel(&card->read);
213 #ifdef CONFIG_IP_MULTICAST
214 INIT_LIST_HEAD(&card->ipm_list);
216 LCS_DBF_HEX(2, setup, &card, sizeof(void*));
221 * Setup read channel.
224 lcs_setup_read_ccws(struct lcs_card *card)
228 LCS_DBF_TEXT(2, setup, "ireadccw");
229 /* Setup read ccws. */
230 memset(card->read.ccws, 0, sizeof (struct ccw1) * (LCS_NUM_BUFFS + 1));
231 for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
232 card->read.ccws[cnt].cmd_code = LCS_CCW_READ;
233 card->read.ccws[cnt].count = LCS_IOBUFFERSIZE;
234 card->read.ccws[cnt].flags =
235 CCW_FLAG_CC | CCW_FLAG_SLI | CCW_FLAG_PCI;
237 * Note: we have allocated the buffer with GFP_DMA, so
238 * we do not need to do set_normalized_cda.
240 card->read.ccws[cnt].cda =
241 (__u32) __pa(card->read.iob[cnt].data);
242 ((struct lcs_header *)
243 card->read.iob[cnt].data)->offset = LCS_ILLEGAL_OFFSET;
244 card->read.iob[cnt].callback = lcs_get_frames_cb;
245 card->read.iob[cnt].state = LCS_BUF_STATE_READY;
246 card->read.iob[cnt].count = LCS_IOBUFFERSIZE;
248 card->read.ccws[0].flags &= ~CCW_FLAG_PCI;
249 card->read.ccws[LCS_NUM_BUFFS - 1].flags &= ~CCW_FLAG_PCI;
250 card->read.ccws[LCS_NUM_BUFFS - 1].flags |= CCW_FLAG_SUSPEND;
251 /* Last ccw is a tic (transfer in channel). */
252 card->read.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER;
253 card->read.ccws[LCS_NUM_BUFFS].cda =
254 (__u32) __pa(card->read.ccws);
255 /* Setg initial state of the read channel. */
256 card->read.state = LCS_CH_STATE_INIT;
258 card->read.io_idx = 0;
259 card->read.buf_idx = 0;
263 lcs_setup_read(struct lcs_card *card)
265 LCS_DBF_TEXT(3, setup, "initread");
267 lcs_setup_read_ccws(card);
268 /* Initialize read channel tasklet. */
269 card->read.irq_tasklet.data = (unsigned long) &card->read;
270 card->read.irq_tasklet.func = lcs_tasklet;
271 /* Initialize waitqueue. */
272 init_waitqueue_head(&card->read.wait_q);
276 * Setup write channel.
279 lcs_setup_write_ccws(struct lcs_card *card)
283 LCS_DBF_TEXT(3, setup, "iwritccw");
284 /* Setup write ccws. */
285 memset(card->write.ccws, 0, sizeof(struct ccw1) * (LCS_NUM_BUFFS + 1));
286 for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
287 card->write.ccws[cnt].cmd_code = LCS_CCW_WRITE;
288 card->write.ccws[cnt].count = 0;
289 card->write.ccws[cnt].flags =
290 CCW_FLAG_SUSPEND | CCW_FLAG_CC | CCW_FLAG_SLI;
292 * Note: we have allocated the buffer with GFP_DMA, so
293 * we do not need to do set_normalized_cda.
295 card->write.ccws[cnt].cda =
296 (__u32) __pa(card->write.iob[cnt].data);
298 /* Last ccw is a tic (transfer in channel). */
299 card->write.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER;
300 card->write.ccws[LCS_NUM_BUFFS].cda =
301 (__u32) __pa(card->write.ccws);
302 /* Set initial state of the write channel. */
303 card->read.state = LCS_CH_STATE_INIT;
305 card->write.io_idx = 0;
306 card->write.buf_idx = 0;
310 lcs_setup_write(struct lcs_card *card)
312 LCS_DBF_TEXT(3, setup, "initwrit");
314 lcs_setup_write_ccws(card);
315 /* Initialize write channel tasklet. */
316 card->write.irq_tasklet.data = (unsigned long) &card->write;
317 card->write.irq_tasklet.func = lcs_tasklet;
318 /* Initialize waitqueue. */
319 init_waitqueue_head(&card->write.wait_q);
323 lcs_set_allowed_threads(struct lcs_card *card, unsigned long threads)
327 spin_lock_irqsave(&card->mask_lock, flags);
328 card->thread_allowed_mask = threads;
329 spin_unlock_irqrestore(&card->mask_lock, flags);
330 wake_up(&card->wait_q);
333 lcs_threads_running(struct lcs_card *card, unsigned long threads)
338 spin_lock_irqsave(&card->mask_lock, flags);
339 rc = (card->thread_running_mask & threads);
340 spin_unlock_irqrestore(&card->mask_lock, flags);
345 lcs_wait_for_threads(struct lcs_card *card, unsigned long threads)
347 return wait_event_interruptible(card->wait_q,
348 lcs_threads_running(card, threads) == 0);
352 lcs_set_thread_start_bit(struct lcs_card *card, unsigned long thread)
356 spin_lock_irqsave(&card->mask_lock, flags);
357 if ( !(card->thread_allowed_mask & thread) ||
358 (card->thread_start_mask & thread) ) {
359 spin_unlock_irqrestore(&card->mask_lock, flags);
362 card->thread_start_mask |= thread;
363 spin_unlock_irqrestore(&card->mask_lock, flags);
368 lcs_clear_thread_running_bit(struct lcs_card *card, unsigned long thread)
372 spin_lock_irqsave(&card->mask_lock, flags);
373 card->thread_running_mask &= ~thread;
374 spin_unlock_irqrestore(&card->mask_lock, flags);
375 wake_up(&card->wait_q);
379 __lcs_do_run_thread(struct lcs_card *card, unsigned long thread)
384 spin_lock_irqsave(&card->mask_lock, flags);
385 if (card->thread_start_mask & thread){
386 if ((card->thread_allowed_mask & thread) &&
387 !(card->thread_running_mask & thread)){
389 card->thread_start_mask &= ~thread;
390 card->thread_running_mask |= thread;
394 spin_unlock_irqrestore(&card->mask_lock, flags);
399 lcs_do_run_thread(struct lcs_card *card, unsigned long thread)
402 wait_event(card->wait_q,
403 (rc = __lcs_do_run_thread(card, thread)) >= 0);
408 lcs_do_start_thread(struct lcs_card *card, unsigned long thread)
413 spin_lock_irqsave(&card->mask_lock, flags);
414 LCS_DBF_TEXT_(4, trace, " %02x%02x%02x",
415 (u8) card->thread_start_mask,
416 (u8) card->thread_allowed_mask,
417 (u8) card->thread_running_mask);
418 rc = (card->thread_start_mask & thread);
419 spin_unlock_irqrestore(&card->mask_lock, flags);
424 * Initialize channels,card and state machines.
427 lcs_setup_card(struct lcs_card *card)
429 LCS_DBF_TEXT(2, setup, "initcard");
430 LCS_DBF_HEX(2, setup, &card, sizeof(void*));
432 lcs_setup_read(card);
433 lcs_setup_write(card);
434 /* Set cards initial state. */
435 card->state = DEV_STATE_DOWN;
436 card->tx_buffer = NULL;
437 card->tx_emitted = 0;
439 init_waitqueue_head(&card->wait_q);
440 spin_lock_init(&card->lock);
441 spin_lock_init(&card->ipm_lock);
442 spin_lock_init(&card->mask_lock);
443 #ifdef CONFIG_IP_MULTICAST
444 INIT_LIST_HEAD(&card->ipm_list);
446 INIT_LIST_HEAD(&card->lancmd_waiters);
450 lcs_clear_multicast_list(struct lcs_card *card)
452 #ifdef CONFIG_IP_MULTICAST
453 struct lcs_ipm_list *ipm;
456 /* Free multicast list. */
457 LCS_DBF_TEXT(3, setup, "clmclist");
458 spin_lock_irqsave(&card->ipm_lock, flags);
459 while (!list_empty(&card->ipm_list)){
460 ipm = list_entry(card->ipm_list.next,
461 struct lcs_ipm_list, list);
462 list_del(&ipm->list);
463 if (ipm->ipm_state != LCS_IPM_STATE_SET_REQUIRED){
464 spin_unlock_irqrestore(&card->ipm_lock, flags);
465 lcs_send_delipm(card, ipm);
466 spin_lock_irqsave(&card->ipm_lock, flags);
470 spin_unlock_irqrestore(&card->ipm_lock, flags);
474 * Cleanup channels,card and state machines.
477 lcs_cleanup_card(struct lcs_card *card)
480 LCS_DBF_TEXT(3, setup, "cleancrd");
481 LCS_DBF_HEX(2,setup,&card,sizeof(void*));
483 if (card->dev != NULL)
484 free_netdev(card->dev);
485 /* Cleanup channels. */
486 lcs_cleanup_channel(&card->write);
487 lcs_cleanup_channel(&card->read);
494 lcs_start_channel(struct lcs_channel *channel)
499 LCS_DBF_TEXT_(4, trace,"ssch%s", dev_name(&channel->ccwdev->dev));
500 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
501 rc = ccw_device_start(channel->ccwdev,
502 channel->ccws + channel->io_idx, 0, 0,
503 DOIO_DENY_PREFETCH | DOIO_ALLOW_SUSPEND);
505 channel->state = LCS_CH_STATE_RUNNING;
506 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
508 LCS_DBF_TEXT_(4,trace,"essh%s",
509 dev_name(&channel->ccwdev->dev));
510 dev_err(&channel->ccwdev->dev,
511 "Starting an LCS device resulted in an error,"
518 lcs_clear_channel(struct lcs_channel *channel)
523 LCS_DBF_TEXT(4,trace,"clearch");
524 LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev));
525 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
526 rc = ccw_device_clear(channel->ccwdev, (addr_t) channel);
527 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
529 LCS_DBF_TEXT_(4, trace, "ecsc%s",
530 dev_name(&channel->ccwdev->dev));
533 wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_CLEARED));
534 channel->state = LCS_CH_STATE_STOPPED;
543 lcs_stop_channel(struct lcs_channel *channel)
548 if (channel->state == LCS_CH_STATE_STOPPED)
550 LCS_DBF_TEXT(4,trace,"haltsch");
551 LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev));
552 channel->state = LCS_CH_STATE_INIT;
553 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
554 rc = ccw_device_halt(channel->ccwdev, (addr_t) channel);
555 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
557 LCS_DBF_TEXT_(4, trace, "ehsc%s",
558 dev_name(&channel->ccwdev->dev));
561 /* Asynchronous halt initialted. Wait for its completion. */
562 wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_HALTED));
563 lcs_clear_channel(channel);
568 * start read and write channel
571 lcs_start_channels(struct lcs_card *card)
575 LCS_DBF_TEXT(2, trace, "chstart");
576 /* start read channel */
577 rc = lcs_start_channel(&card->read);
580 /* start write channel */
581 rc = lcs_start_channel(&card->write);
583 lcs_stop_channel(&card->read);
588 * stop read and write channel
591 lcs_stop_channels(struct lcs_card *card)
593 LCS_DBF_TEXT(2, trace, "chhalt");
594 lcs_stop_channel(&card->read);
595 lcs_stop_channel(&card->write);
602 static struct lcs_buffer *
603 __lcs_get_buffer(struct lcs_channel *channel)
607 LCS_DBF_TEXT(5, trace, "_getbuff");
608 index = channel->io_idx;
610 if (channel->iob[index].state == LCS_BUF_STATE_EMPTY) {
611 channel->iob[index].state = LCS_BUF_STATE_LOCKED;
612 return channel->iob + index;
614 index = (index + 1) & (LCS_NUM_BUFFS - 1);
615 } while (index != channel->io_idx);
619 static struct lcs_buffer *
620 lcs_get_buffer(struct lcs_channel *channel)
622 struct lcs_buffer *buffer;
625 LCS_DBF_TEXT(5, trace, "getbuff");
626 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
627 buffer = __lcs_get_buffer(channel);
628 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
633 * Resume channel program if the channel is suspended.
636 __lcs_resume_channel(struct lcs_channel *channel)
640 if (channel->state != LCS_CH_STATE_SUSPENDED)
642 if (channel->ccws[channel->io_idx].flags & CCW_FLAG_SUSPEND)
644 LCS_DBF_TEXT_(5, trace, "rsch%s", dev_name(&channel->ccwdev->dev));
645 rc = ccw_device_resume(channel->ccwdev);
647 LCS_DBF_TEXT_(4, trace, "ersc%s",
648 dev_name(&channel->ccwdev->dev));
649 dev_err(&channel->ccwdev->dev,
650 "Sending data from the LCS device to the LAN failed"
653 channel->state = LCS_CH_STATE_RUNNING;
659 * Make a buffer ready for processing.
662 __lcs_ready_buffer_bits(struct lcs_channel *channel, int index)
666 LCS_DBF_TEXT(5, trace, "rdybits");
667 prev = (index - 1) & (LCS_NUM_BUFFS - 1);
668 next = (index + 1) & (LCS_NUM_BUFFS - 1);
669 /* Check if we may clear the suspend bit of this buffer. */
670 if (channel->ccws[next].flags & CCW_FLAG_SUSPEND) {
671 /* Check if we have to set the PCI bit. */
672 if (!(channel->ccws[prev].flags & CCW_FLAG_SUSPEND))
673 /* Suspend bit of the previous buffer is not set. */
674 channel->ccws[index].flags |= CCW_FLAG_PCI;
675 /* Suspend bit of the next buffer is set. */
676 channel->ccws[index].flags &= ~CCW_FLAG_SUSPEND;
681 lcs_ready_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
686 LCS_DBF_TEXT(5, trace, "rdybuff");
687 BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED &&
688 buffer->state != LCS_BUF_STATE_PROCESSED);
689 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
690 buffer->state = LCS_BUF_STATE_READY;
691 index = buffer - channel->iob;
693 channel->ccws[index].count = buffer->count;
694 /* Check relevant PCI/suspend bits. */
695 __lcs_ready_buffer_bits(channel, index);
696 rc = __lcs_resume_channel(channel);
697 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
702 * Mark the buffer as processed. Take care of the suspend bit
703 * of the previous buffer. This function is called from
704 * interrupt context, so the lock must not be taken.
707 __lcs_processed_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
709 int index, prev, next;
711 LCS_DBF_TEXT(5, trace, "prcsbuff");
712 BUG_ON(buffer->state != LCS_BUF_STATE_READY);
713 buffer->state = LCS_BUF_STATE_PROCESSED;
714 index = buffer - channel->iob;
715 prev = (index - 1) & (LCS_NUM_BUFFS - 1);
716 next = (index + 1) & (LCS_NUM_BUFFS - 1);
717 /* Set the suspend bit and clear the PCI bit of this buffer. */
718 channel->ccws[index].flags |= CCW_FLAG_SUSPEND;
719 channel->ccws[index].flags &= ~CCW_FLAG_PCI;
720 /* Check the suspend bit of the previous buffer. */
721 if (channel->iob[prev].state == LCS_BUF_STATE_READY) {
723 * Previous buffer is in state ready. It might have
724 * happened in lcs_ready_buffer that the suspend bit
725 * has not been cleared to avoid an endless loop.
728 __lcs_ready_buffer_bits(channel, prev);
730 /* Clear PCI bit of next buffer. */
731 channel->ccws[next].flags &= ~CCW_FLAG_PCI;
732 return __lcs_resume_channel(channel);
736 * Put a processed buffer back to state empty.
739 lcs_release_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
743 LCS_DBF_TEXT(5, trace, "relbuff");
744 BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED &&
745 buffer->state != LCS_BUF_STATE_PROCESSED);
746 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
747 buffer->state = LCS_BUF_STATE_EMPTY;
748 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
752 * Get buffer for a lan command.
754 static struct lcs_buffer *
755 lcs_get_lancmd(struct lcs_card *card, int count)
757 struct lcs_buffer *buffer;
760 LCS_DBF_TEXT(4, trace, "getlncmd");
761 /* Get buffer and wait if none is available. */
762 wait_event(card->write.wait_q,
763 ((buffer = lcs_get_buffer(&card->write)) != NULL));
764 count += sizeof(struct lcs_header);
765 *(__u16 *)(buffer->data + count) = 0;
766 buffer->count = count + sizeof(__u16);
767 buffer->callback = lcs_release_buffer;
768 cmd = (struct lcs_cmd *) buffer->data;
770 cmd->type = LCS_FRAME_TYPE_CONTROL;
777 lcs_get_reply(struct lcs_reply *reply)
779 WARN_ON(atomic_read(&reply->refcnt) <= 0);
780 atomic_inc(&reply->refcnt);
784 lcs_put_reply(struct lcs_reply *reply)
786 WARN_ON(atomic_read(&reply->refcnt) <= 0);
787 if (atomic_dec_and_test(&reply->refcnt)) {
793 static struct lcs_reply *
794 lcs_alloc_reply(struct lcs_cmd *cmd)
796 struct lcs_reply *reply;
798 LCS_DBF_TEXT(4, trace, "getreply");
800 reply = kzalloc(sizeof(struct lcs_reply), GFP_ATOMIC);
803 atomic_set(&reply->refcnt,1);
804 reply->sequence_no = cmd->sequence_no;
807 init_waitqueue_head(&reply->wait_q);
813 * Notifier function for lancmd replies. Called from read irq.
816 lcs_notify_lancmd_waiters(struct lcs_card *card, struct lcs_cmd *cmd)
818 struct list_head *l, *n;
819 struct lcs_reply *reply;
821 LCS_DBF_TEXT(4, trace, "notiwait");
822 spin_lock(&card->lock);
823 list_for_each_safe(l, n, &card->lancmd_waiters) {
824 reply = list_entry(l, struct lcs_reply, list);
825 if (reply->sequence_no == cmd->sequence_no) {
826 lcs_get_reply(reply);
827 list_del_init(&reply->list);
828 if (reply->callback != NULL)
829 reply->callback(card, cmd);
831 reply->rc = cmd->return_code;
832 wake_up(&reply->wait_q);
833 lcs_put_reply(reply);
837 spin_unlock(&card->lock);
841 * Emit buffer of a lan command.
844 lcs_lancmd_timeout(unsigned long data)
846 struct lcs_reply *reply, *list_reply, *r;
849 LCS_DBF_TEXT(4, trace, "timeout");
850 reply = (struct lcs_reply *) data;
851 spin_lock_irqsave(&reply->card->lock, flags);
852 list_for_each_entry_safe(list_reply, r,
853 &reply->card->lancmd_waiters,list) {
854 if (reply == list_reply) {
855 lcs_get_reply(reply);
856 list_del_init(&reply->list);
857 spin_unlock_irqrestore(&reply->card->lock, flags);
860 wake_up(&reply->wait_q);
861 lcs_put_reply(reply);
865 spin_unlock_irqrestore(&reply->card->lock, flags);
869 lcs_send_lancmd(struct lcs_card *card, struct lcs_buffer *buffer,
870 void (*reply_callback)(struct lcs_card *, struct lcs_cmd *))
872 struct lcs_reply *reply;
874 struct timer_list timer;
878 LCS_DBF_TEXT(4, trace, "sendcmd");
879 cmd = (struct lcs_cmd *) buffer->data;
880 cmd->return_code = 0;
881 cmd->sequence_no = card->sequence_no++;
882 reply = lcs_alloc_reply(cmd);
885 reply->callback = reply_callback;
887 spin_lock_irqsave(&card->lock, flags);
888 list_add_tail(&reply->list, &card->lancmd_waiters);
889 spin_unlock_irqrestore(&card->lock, flags);
891 buffer->callback = lcs_release_buffer;
892 rc = lcs_ready_buffer(&card->write, buffer);
895 init_timer_on_stack(&timer);
896 timer.function = lcs_lancmd_timeout;
897 timer.data = (unsigned long) reply;
898 timer.expires = jiffies + HZ*card->lancmd_timeout;
900 wait_event(reply->wait_q, reply->received);
901 del_timer_sync(&timer);
902 destroy_timer_on_stack(&timer);
903 LCS_DBF_TEXT_(4, trace, "rc:%d",reply->rc);
905 lcs_put_reply(reply);
906 return rc ? -EIO : 0;
910 * LCS startup command
913 lcs_send_startup(struct lcs_card *card, __u8 initiator)
915 struct lcs_buffer *buffer;
918 LCS_DBF_TEXT(2, trace, "startup");
919 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
920 cmd = (struct lcs_cmd *) buffer->data;
921 cmd->cmd_code = LCS_CMD_STARTUP;
922 cmd->initiator = initiator;
923 cmd->cmd.lcs_startup.buff_size = LCS_IOBUFFERSIZE;
924 return lcs_send_lancmd(card, buffer, NULL);
928 * LCS shutdown command
931 lcs_send_shutdown(struct lcs_card *card)
933 struct lcs_buffer *buffer;
936 LCS_DBF_TEXT(2, trace, "shutdown");
937 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
938 cmd = (struct lcs_cmd *) buffer->data;
939 cmd->cmd_code = LCS_CMD_SHUTDOWN;
940 cmd->initiator = LCS_INITIATOR_TCPIP;
941 return lcs_send_lancmd(card, buffer, NULL);
945 * LCS lanstat command
948 __lcs_lanstat_cb(struct lcs_card *card, struct lcs_cmd *cmd)
950 LCS_DBF_TEXT(2, trace, "statcb");
951 memcpy(card->mac, cmd->cmd.lcs_lanstat_cmd.mac_addr, LCS_MAC_LENGTH);
955 lcs_send_lanstat(struct lcs_card *card)
957 struct lcs_buffer *buffer;
960 LCS_DBF_TEXT(2,trace, "cmdstat");
961 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
962 cmd = (struct lcs_cmd *) buffer->data;
963 /* Setup lanstat command. */
964 cmd->cmd_code = LCS_CMD_LANSTAT;
965 cmd->initiator = LCS_INITIATOR_TCPIP;
966 cmd->cmd.lcs_std_cmd.lan_type = card->lan_type;
967 cmd->cmd.lcs_std_cmd.portno = card->portno;
968 return lcs_send_lancmd(card, buffer, __lcs_lanstat_cb);
972 * send stoplan command
975 lcs_send_stoplan(struct lcs_card *card, __u8 initiator)
977 struct lcs_buffer *buffer;
980 LCS_DBF_TEXT(2, trace, "cmdstpln");
981 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
982 cmd = (struct lcs_cmd *) buffer->data;
983 cmd->cmd_code = LCS_CMD_STOPLAN;
984 cmd->initiator = initiator;
985 cmd->cmd.lcs_std_cmd.lan_type = card->lan_type;
986 cmd->cmd.lcs_std_cmd.portno = card->portno;
987 return lcs_send_lancmd(card, buffer, NULL);
991 * send startlan command
994 __lcs_send_startlan_cb(struct lcs_card *card, struct lcs_cmd *cmd)
996 LCS_DBF_TEXT(2, trace, "srtlancb");
997 card->lan_type = cmd->cmd.lcs_std_cmd.lan_type;
998 card->portno = cmd->cmd.lcs_std_cmd.portno;
1002 lcs_send_startlan(struct lcs_card *card, __u8 initiator)
1004 struct lcs_buffer *buffer;
1005 struct lcs_cmd *cmd;
1007 LCS_DBF_TEXT(2, trace, "cmdstaln");
1008 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
1009 cmd = (struct lcs_cmd *) buffer->data;
1010 cmd->cmd_code = LCS_CMD_STARTLAN;
1011 cmd->initiator = initiator;
1012 cmd->cmd.lcs_std_cmd.lan_type = card->lan_type;
1013 cmd->cmd.lcs_std_cmd.portno = card->portno;
1014 return lcs_send_lancmd(card, buffer, __lcs_send_startlan_cb);
1017 #ifdef CONFIG_IP_MULTICAST
1019 * send setipm command (Multicast)
1022 lcs_send_setipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list)
1024 struct lcs_buffer *buffer;
1025 struct lcs_cmd *cmd;
1027 LCS_DBF_TEXT(2, trace, "cmdsetim");
1028 buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE);
1029 cmd = (struct lcs_cmd *) buffer->data;
1030 cmd->cmd_code = LCS_CMD_SETIPM;
1031 cmd->initiator = LCS_INITIATOR_TCPIP;
1032 cmd->cmd.lcs_qipassist.lan_type = card->lan_type;
1033 cmd->cmd.lcs_qipassist.portno = card->portno;
1034 cmd->cmd.lcs_qipassist.version = 4;
1035 cmd->cmd.lcs_qipassist.num_ip_pairs = 1;
1036 memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair,
1037 &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair));
1038 LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr);
1039 return lcs_send_lancmd(card, buffer, NULL);
1043 * send delipm command (Multicast)
1046 lcs_send_delipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list)
1048 struct lcs_buffer *buffer;
1049 struct lcs_cmd *cmd;
1051 LCS_DBF_TEXT(2, trace, "cmddelim");
1052 buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE);
1053 cmd = (struct lcs_cmd *) buffer->data;
1054 cmd->cmd_code = LCS_CMD_DELIPM;
1055 cmd->initiator = LCS_INITIATOR_TCPIP;
1056 cmd->cmd.lcs_qipassist.lan_type = card->lan_type;
1057 cmd->cmd.lcs_qipassist.portno = card->portno;
1058 cmd->cmd.lcs_qipassist.version = 4;
1059 cmd->cmd.lcs_qipassist.num_ip_pairs = 1;
1060 memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair,
1061 &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair));
1062 LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr);
1063 return lcs_send_lancmd(card, buffer, NULL);
1067 * check if multicast is supported by LCS
1070 __lcs_check_multicast_cb(struct lcs_card *card, struct lcs_cmd *cmd)
1072 LCS_DBF_TEXT(2, trace, "chkmccb");
1073 card->ip_assists_supported =
1074 cmd->cmd.lcs_qipassist.ip_assists_supported;
1075 card->ip_assists_enabled =
1076 cmd->cmd.lcs_qipassist.ip_assists_enabled;
1080 lcs_check_multicast_support(struct lcs_card *card)
1082 struct lcs_buffer *buffer;
1083 struct lcs_cmd *cmd;
1086 LCS_DBF_TEXT(2, trace, "cmdqipa");
1087 /* Send query ipassist. */
1088 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
1089 cmd = (struct lcs_cmd *) buffer->data;
1090 cmd->cmd_code = LCS_CMD_QIPASSIST;
1091 cmd->initiator = LCS_INITIATOR_TCPIP;
1092 cmd->cmd.lcs_qipassist.lan_type = card->lan_type;
1093 cmd->cmd.lcs_qipassist.portno = card->portno;
1094 cmd->cmd.lcs_qipassist.version = 4;
1095 cmd->cmd.lcs_qipassist.num_ip_pairs = 1;
1096 rc = lcs_send_lancmd(card, buffer, __lcs_check_multicast_cb);
1098 pr_err("Query IPAssist failed. Assuming unsupported!\n");
1101 if (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT)
1107 * set or del multicast address on LCS card
1110 lcs_fix_multicast_list(struct lcs_card *card)
1112 struct list_head failed_list;
1113 struct lcs_ipm_list *ipm, *tmp;
1114 unsigned long flags;
1117 LCS_DBF_TEXT(4,trace, "fixipm");
1118 INIT_LIST_HEAD(&failed_list);
1119 spin_lock_irqsave(&card->ipm_lock, flags);
1121 list_for_each_entry_safe(ipm, tmp, &card->ipm_list, list){
1122 switch (ipm->ipm_state) {
1123 case LCS_IPM_STATE_SET_REQUIRED:
1124 /* del from ipm_list so no one else can tamper with
1126 list_del_init(&ipm->list);
1127 spin_unlock_irqrestore(&card->ipm_lock, flags);
1128 rc = lcs_send_setipm(card, ipm);
1129 spin_lock_irqsave(&card->ipm_lock, flags);
1131 pr_info("Adding multicast address failed."
1132 " Table possibly full!\n");
1133 /* store ipm in failed list -> will be added
1134 * to ipm_list again, so a retry will be done
1135 * during the next call of this function */
1136 list_add_tail(&ipm->list, &failed_list);
1138 ipm->ipm_state = LCS_IPM_STATE_ON_CARD;
1139 /* re-insert into ipm_list */
1140 list_add_tail(&ipm->list, &card->ipm_list);
1143 case LCS_IPM_STATE_DEL_REQUIRED:
1144 list_del(&ipm->list);
1145 spin_unlock_irqrestore(&card->ipm_lock, flags);
1146 lcs_send_delipm(card, ipm);
1147 spin_lock_irqsave(&card->ipm_lock, flags);
1150 case LCS_IPM_STATE_ON_CARD:
1154 /* re-insert all entries from the failed_list into ipm_list */
1155 list_for_each_entry_safe(ipm, tmp, &failed_list, list)
1156 list_move_tail(&ipm->list, &card->ipm_list);
1158 spin_unlock_irqrestore(&card->ipm_lock, flags);
1162 * get mac address for the relevant Multicast address
1165 lcs_get_mac_for_ipm(__be32 ipm, char *mac, struct net_device *dev)
1167 LCS_DBF_TEXT(4,trace, "getmac");
1168 ip_eth_mc_map(ipm, mac);
1172 * function called by net device to handle multicast address relevant things
1175 lcs_remove_mc_addresses(struct lcs_card *card, struct in_device *in4_dev)
1177 struct ip_mc_list *im4;
1178 struct list_head *l;
1179 struct lcs_ipm_list *ipm;
1180 unsigned long flags;
1181 char buf[MAX_ADDR_LEN];
1183 LCS_DBF_TEXT(4, trace, "remmclst");
1184 spin_lock_irqsave(&card->ipm_lock, flags);
1185 list_for_each(l, &card->ipm_list) {
1186 ipm = list_entry(l, struct lcs_ipm_list, list);
1187 for (im4 = rcu_dereference(in4_dev->mc_list);
1188 im4 != NULL; im4 = rcu_dereference(im4->next_rcu)) {
1189 lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev);
1190 if ( (ipm->ipm.ip_addr == im4->multiaddr) &&
1191 (memcmp(buf, &ipm->ipm.mac_addr,
1192 LCS_MAC_LENGTH) == 0) )
1196 ipm->ipm_state = LCS_IPM_STATE_DEL_REQUIRED;
1198 spin_unlock_irqrestore(&card->ipm_lock, flags);
1201 static inline struct lcs_ipm_list *
1202 lcs_check_addr_entry(struct lcs_card *card, struct ip_mc_list *im4, char *buf)
1204 struct lcs_ipm_list *tmp, *ipm = NULL;
1205 struct list_head *l;
1206 unsigned long flags;
1208 LCS_DBF_TEXT(4, trace, "chkmcent");
1209 spin_lock_irqsave(&card->ipm_lock, flags);
1210 list_for_each(l, &card->ipm_list) {
1211 tmp = list_entry(l, struct lcs_ipm_list, list);
1212 if ( (tmp->ipm.ip_addr == im4->multiaddr) &&
1213 (memcmp(buf, &tmp->ipm.mac_addr,
1214 LCS_MAC_LENGTH) == 0) ) {
1219 spin_unlock_irqrestore(&card->ipm_lock, flags);
1224 lcs_set_mc_addresses(struct lcs_card *card, struct in_device *in4_dev)
1227 struct ip_mc_list *im4;
1228 struct lcs_ipm_list *ipm;
1229 char buf[MAX_ADDR_LEN];
1230 unsigned long flags;
1232 LCS_DBF_TEXT(4, trace, "setmclst");
1233 for (im4 = rcu_dereference(in4_dev->mc_list); im4 != NULL;
1234 im4 = rcu_dereference(im4->next_rcu)) {
1235 lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev);
1236 ipm = lcs_check_addr_entry(card, im4, buf);
1238 continue; /* Address already in list. */
1239 ipm = kzalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC);
1241 pr_info("Not enough memory to add"
1242 " new multicast entry!\n");
1245 memcpy(&ipm->ipm.mac_addr, buf, LCS_MAC_LENGTH);
1246 ipm->ipm.ip_addr = im4->multiaddr;
1247 ipm->ipm_state = LCS_IPM_STATE_SET_REQUIRED;
1248 spin_lock_irqsave(&card->ipm_lock, flags);
1249 LCS_DBF_HEX(2,trace,&ipm->ipm.ip_addr,4);
1250 list_add(&ipm->list, &card->ipm_list);
1251 spin_unlock_irqrestore(&card->ipm_lock, flags);
1256 lcs_register_mc_addresses(void *data)
1258 struct lcs_card *card;
1259 struct in_device *in4_dev;
1261 card = (struct lcs_card *) data;
1263 if (!lcs_do_run_thread(card, LCS_SET_MC_THREAD))
1265 LCS_DBF_TEXT(4, trace, "regmulti");
1267 in4_dev = in_dev_get(card->dev);
1268 if (in4_dev == NULL)
1271 lcs_remove_mc_addresses(card,in4_dev);
1272 lcs_set_mc_addresses(card, in4_dev);
1274 in_dev_put(in4_dev);
1276 netif_carrier_off(card->dev);
1277 netif_tx_disable(card->dev);
1278 wait_event(card->write.wait_q,
1279 (card->write.state != LCS_CH_STATE_RUNNING));
1280 lcs_fix_multicast_list(card);
1281 if (card->state == DEV_STATE_UP) {
1282 netif_carrier_on(card->dev);
1283 netif_wake_queue(card->dev);
1286 lcs_clear_thread_running_bit(card, LCS_SET_MC_THREAD);
1289 #endif /* CONFIG_IP_MULTICAST */
1292 * function called by net device to
1293 * handle multicast address relevant things
1296 lcs_set_multicast_list(struct net_device *dev)
1298 #ifdef CONFIG_IP_MULTICAST
1299 struct lcs_card *card;
1301 LCS_DBF_TEXT(4, trace, "setmulti");
1302 card = (struct lcs_card *) dev->ml_priv;
1304 if (!lcs_set_thread_start_bit(card, LCS_SET_MC_THREAD))
1305 schedule_work(&card->kernel_thread_starter);
1306 #endif /* CONFIG_IP_MULTICAST */
1310 lcs_check_irb_error(struct ccw_device *cdev, struct irb *irb)
1315 switch (PTR_ERR(irb)) {
1317 dev_warn(&cdev->dev,
1318 "An I/O-error occurred on the LCS device\n");
1319 LCS_DBF_TEXT(2, trace, "ckirberr");
1320 LCS_DBF_TEXT_(2, trace, " rc%d", -EIO);
1323 dev_warn(&cdev->dev,
1324 "A command timed out on the LCS device\n");
1325 LCS_DBF_TEXT(2, trace, "ckirberr");
1326 LCS_DBF_TEXT_(2, trace, " rc%d", -ETIMEDOUT);
1329 dev_warn(&cdev->dev,
1330 "An error occurred on the LCS device, rc=%ld\n",
1332 LCS_DBF_TEXT(2, trace, "ckirberr");
1333 LCS_DBF_TEXT(2, trace, " rc???");
1335 return PTR_ERR(irb);
1339 lcs_get_problem(struct ccw_device *cdev, struct irb *irb)
1344 sense = (char *) irb->ecw;
1345 cstat = irb->scsw.cmd.cstat;
1346 dstat = irb->scsw.cmd.dstat;
1348 if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1349 SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1350 SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1351 LCS_DBF_TEXT(2, trace, "CGENCHK");
1354 if (dstat & DEV_STAT_UNIT_CHECK) {
1355 if (sense[LCS_SENSE_BYTE_1] &
1356 LCS_SENSE_RESETTING_EVENT) {
1357 LCS_DBF_TEXT(2, trace, "REVIND");
1360 if (sense[LCS_SENSE_BYTE_0] &
1361 LCS_SENSE_CMD_REJECT) {
1362 LCS_DBF_TEXT(2, trace, "CMDREJ");
1365 if ((!sense[LCS_SENSE_BYTE_0]) &&
1366 (!sense[LCS_SENSE_BYTE_1]) &&
1367 (!sense[LCS_SENSE_BYTE_2]) &&
1368 (!sense[LCS_SENSE_BYTE_3])) {
1369 LCS_DBF_TEXT(2, trace, "ZEROSEN");
1372 LCS_DBF_TEXT(2, trace, "DGENCHK");
1379 lcs_schedule_recovery(struct lcs_card *card)
1381 LCS_DBF_TEXT(2, trace, "startrec");
1382 if (!lcs_set_thread_start_bit(card, LCS_RECOVERY_THREAD))
1383 schedule_work(&card->kernel_thread_starter);
1387 * IRQ Handler for LCS channels
1390 lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
1392 struct lcs_card *card;
1393 struct lcs_channel *channel;
1397 if (lcs_check_irb_error(cdev, irb))
1400 card = CARD_FROM_DEV(cdev);
1401 if (card->read.ccwdev == cdev)
1402 channel = &card->read;
1404 channel = &card->write;
1406 cstat = irb->scsw.cmd.cstat;
1407 dstat = irb->scsw.cmd.dstat;
1408 LCS_DBF_TEXT_(5, trace, "Rint%s", dev_name(&cdev->dev));
1409 LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.cstat,
1410 irb->scsw.cmd.dstat);
1411 LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.fctl,
1412 irb->scsw.cmd.actl);
1414 /* Check for channel and device errors presented */
1415 rc = lcs_get_problem(cdev, irb);
1416 if (rc || (dstat & DEV_STAT_UNIT_EXCEP)) {
1417 dev_warn(&cdev->dev,
1418 "The LCS device stopped because of an error,"
1419 " dstat=0x%X, cstat=0x%X \n",
1422 channel->state = LCS_CH_STATE_ERROR;
1425 if (channel->state == LCS_CH_STATE_ERROR) {
1426 lcs_schedule_recovery(card);
1427 wake_up(&card->wait_q);
1430 /* How far in the ccw chain have we processed? */
1431 if ((channel->state != LCS_CH_STATE_INIT) &&
1432 (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) &&
1433 (irb->scsw.cmd.cpa != 0)) {
1434 index = (struct ccw1 *) __va((addr_t) irb->scsw.cmd.cpa)
1436 if ((irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) ||
1437 (irb->scsw.cmd.cstat & SCHN_STAT_PCI))
1438 /* Bloody io subsystem tells us lies about cpa... */
1439 index = (index - 1) & (LCS_NUM_BUFFS - 1);
1440 while (channel->io_idx != index) {
1441 __lcs_processed_buffer(channel,
1442 channel->iob + channel->io_idx);
1444 (channel->io_idx + 1) & (LCS_NUM_BUFFS - 1);
1448 if ((irb->scsw.cmd.dstat & DEV_STAT_DEV_END) ||
1449 (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) ||
1450 (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK))
1451 /* Mark channel as stopped. */
1452 channel->state = LCS_CH_STATE_STOPPED;
1453 else if (irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED)
1454 /* CCW execution stopped on a suspend bit. */
1455 channel->state = LCS_CH_STATE_SUSPENDED;
1456 if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1457 if (irb->scsw.cmd.cc != 0) {
1458 ccw_device_halt(channel->ccwdev, (addr_t) channel);
1461 /* The channel has been stopped by halt_IO. */
1462 channel->state = LCS_CH_STATE_HALTED;
1464 if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC)
1465 channel->state = LCS_CH_STATE_CLEARED;
1466 /* Do the rest in the tasklet. */
1467 tasklet_schedule(&channel->irq_tasklet);
1471 * Tasklet for IRQ handler
1474 lcs_tasklet(unsigned long data)
1476 unsigned long flags;
1477 struct lcs_channel *channel;
1478 struct lcs_buffer *iob;
1481 channel = (struct lcs_channel *) data;
1482 LCS_DBF_TEXT_(5, trace, "tlet%s", dev_name(&channel->ccwdev->dev));
1484 /* Check for processed buffers. */
1486 buf_idx = channel->buf_idx;
1487 while (iob[buf_idx].state == LCS_BUF_STATE_PROCESSED) {
1488 /* Do the callback thing. */
1489 if (iob[buf_idx].callback != NULL)
1490 iob[buf_idx].callback(channel, iob + buf_idx);
1491 buf_idx = (buf_idx + 1) & (LCS_NUM_BUFFS - 1);
1493 channel->buf_idx = buf_idx;
1495 if (channel->state == LCS_CH_STATE_STOPPED)
1496 lcs_start_channel(channel);
1497 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1498 if (channel->state == LCS_CH_STATE_SUSPENDED &&
1499 channel->iob[channel->io_idx].state == LCS_BUF_STATE_READY)
1500 __lcs_resume_channel(channel);
1501 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1503 /* Something happened on the channel. Wake up waiters. */
1504 wake_up(&channel->wait_q);
1508 * Finish current tx buffer and make it ready for transmit.
1511 __lcs_emit_txbuffer(struct lcs_card *card)
1513 LCS_DBF_TEXT(5, trace, "emittx");
1514 *(__u16 *)(card->tx_buffer->data + card->tx_buffer->count) = 0;
1515 card->tx_buffer->count += 2;
1516 lcs_ready_buffer(&card->write, card->tx_buffer);
1517 card->tx_buffer = NULL;
1522 * Callback for finished tx buffers.
1525 lcs_txbuffer_cb(struct lcs_channel *channel, struct lcs_buffer *buffer)
1527 struct lcs_card *card;
1529 LCS_DBF_TEXT(5, trace, "txbuffcb");
1530 /* Put buffer back to pool. */
1531 lcs_release_buffer(channel, buffer);
1532 card = container_of(channel, struct lcs_card, write);
1533 if (netif_queue_stopped(card->dev) && netif_carrier_ok(card->dev))
1534 netif_wake_queue(card->dev);
1535 spin_lock(&card->lock);
1537 if (card->tx_emitted <= 0 && card->tx_buffer != NULL)
1539 * Last running tx buffer has finished. Submit partially
1540 * filled current buffer.
1542 __lcs_emit_txbuffer(card);
1543 spin_unlock(&card->lock);
1547 * Packet transmit function called by network stack
1550 __lcs_start_xmit(struct lcs_card *card, struct sk_buff *skb,
1551 struct net_device *dev)
1553 struct lcs_header *header;
1554 int rc = NETDEV_TX_OK;
1556 LCS_DBF_TEXT(5, trace, "hardxmit");
1558 card->stats.tx_dropped++;
1559 card->stats.tx_errors++;
1560 return NETDEV_TX_OK;
1562 if (card->state != DEV_STATE_UP) {
1564 card->stats.tx_dropped++;
1565 card->stats.tx_errors++;
1566 card->stats.tx_carrier_errors++;
1567 return NETDEV_TX_OK;
1569 if (skb->protocol == htons(ETH_P_IPV6)) {
1571 return NETDEV_TX_OK;
1573 netif_stop_queue(card->dev);
1574 spin_lock(&card->lock);
1575 if (card->tx_buffer != NULL &&
1576 card->tx_buffer->count + sizeof(struct lcs_header) +
1577 skb->len + sizeof(u16) > LCS_IOBUFFERSIZE)
1578 /* skb too big for current tx buffer. */
1579 __lcs_emit_txbuffer(card);
1580 if (card->tx_buffer == NULL) {
1581 /* Get new tx buffer */
1582 card->tx_buffer = lcs_get_buffer(&card->write);
1583 if (card->tx_buffer == NULL) {
1584 card->stats.tx_dropped++;
1585 rc = NETDEV_TX_BUSY;
1588 card->tx_buffer->callback = lcs_txbuffer_cb;
1589 card->tx_buffer->count = 0;
1591 header = (struct lcs_header *)
1592 (card->tx_buffer->data + card->tx_buffer->count);
1593 card->tx_buffer->count += skb->len + sizeof(struct lcs_header);
1594 header->offset = card->tx_buffer->count;
1595 header->type = card->lan_type;
1596 header->slot = card->portno;
1597 skb_copy_from_linear_data(skb, header + 1, skb->len);
1598 spin_unlock(&card->lock);
1599 card->stats.tx_bytes += skb->len;
1600 card->stats.tx_packets++;
1602 netif_wake_queue(card->dev);
1603 spin_lock(&card->lock);
1604 if (card->tx_emitted <= 0 && card->tx_buffer != NULL)
1605 /* If this is the first tx buffer emit it immediately. */
1606 __lcs_emit_txbuffer(card);
1608 spin_unlock(&card->lock);
1613 lcs_start_xmit(struct sk_buff *skb, struct net_device *dev)
1615 struct lcs_card *card;
1618 LCS_DBF_TEXT(5, trace, "pktxmit");
1619 card = (struct lcs_card *) dev->ml_priv;
1620 rc = __lcs_start_xmit(card, skb, dev);
1625 * send startlan and lanstat command to make LCS device ready
1628 lcs_startlan_auto(struct lcs_card *card)
1632 LCS_DBF_TEXT(2, trace, "strtauto");
1633 #ifdef CONFIG_ETHERNET
1634 card->lan_type = LCS_FRAME_TYPE_ENET;
1635 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1641 card->lan_type = LCS_FRAME_TYPE_FDDI;
1642 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1650 lcs_startlan(struct lcs_card *card)
1654 LCS_DBF_TEXT(2, trace, "startlan");
1656 if (card->portno != LCS_INVALID_PORT_NO) {
1657 if (card->lan_type == LCS_FRAME_TYPE_AUTO)
1658 rc = lcs_startlan_auto(card);
1660 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1662 for (i = 0; i <= 16; i++) {
1664 if (card->lan_type != LCS_FRAME_TYPE_AUTO)
1665 rc = lcs_send_startlan(card,
1666 LCS_INITIATOR_TCPIP);
1668 /* autodetecting lan type */
1669 rc = lcs_startlan_auto(card);
1675 return lcs_send_lanstat(card);
1680 * LCS detect function
1681 * setup channels and make them I/O ready
1684 lcs_detect(struct lcs_card *card)
1688 LCS_DBF_TEXT(2, setup, "lcsdetct");
1689 /* start/reset card */
1691 netif_stop_queue(card->dev);
1692 rc = lcs_stop_channels(card);
1694 rc = lcs_start_channels(card);
1696 rc = lcs_send_startup(card, LCS_INITIATOR_TCPIP);
1698 rc = lcs_startlan(card);
1702 card->state = DEV_STATE_UP;
1704 card->state = DEV_STATE_DOWN;
1705 card->write.state = LCS_CH_STATE_INIT;
1706 card->read.state = LCS_CH_STATE_INIT;
1715 lcs_stopcard(struct lcs_card *card)
1719 LCS_DBF_TEXT(3, setup, "stopcard");
1721 if (card->read.state != LCS_CH_STATE_STOPPED &&
1722 card->write.state != LCS_CH_STATE_STOPPED &&
1723 card->read.state != LCS_CH_STATE_ERROR &&
1724 card->write.state != LCS_CH_STATE_ERROR &&
1725 card->state == DEV_STATE_UP) {
1726 lcs_clear_multicast_list(card);
1727 rc = lcs_send_stoplan(card,LCS_INITIATOR_TCPIP);
1728 rc = lcs_send_shutdown(card);
1730 rc = lcs_stop_channels(card);
1731 card->state = DEV_STATE_DOWN;
1737 * Kernel Thread helper functions for LGW initiated commands
1740 lcs_start_kernel_thread(struct work_struct *work)
1742 struct lcs_card *card = container_of(work, struct lcs_card, kernel_thread_starter);
1743 LCS_DBF_TEXT(5, trace, "krnthrd");
1744 if (lcs_do_start_thread(card, LCS_RECOVERY_THREAD))
1745 kthread_run(lcs_recovery, card, "lcs_recover");
1746 #ifdef CONFIG_IP_MULTICAST
1747 if (lcs_do_start_thread(card, LCS_SET_MC_THREAD))
1748 kthread_run(lcs_register_mc_addresses, card, "regipm");
1753 * Process control frames.
1756 lcs_get_control(struct lcs_card *card, struct lcs_cmd *cmd)
1758 LCS_DBF_TEXT(5, trace, "getctrl");
1759 if (cmd->initiator == LCS_INITIATOR_LGW) {
1760 switch(cmd->cmd_code) {
1761 case LCS_CMD_STARTUP:
1762 case LCS_CMD_STARTLAN:
1763 lcs_schedule_recovery(card);
1765 case LCS_CMD_STOPLAN:
1766 pr_warning("Stoplan for %s initiated by LGW.\n",
1769 netif_carrier_off(card->dev);
1772 LCS_DBF_TEXT(5, trace, "noLGWcmd");
1776 lcs_notify_lancmd_waiters(card, cmd);
1780 * Unpack network packet.
1783 lcs_get_skb(struct lcs_card *card, char *skb_data, unsigned int skb_len)
1785 struct sk_buff *skb;
1787 LCS_DBF_TEXT(5, trace, "getskb");
1788 if (card->dev == NULL ||
1789 card->state != DEV_STATE_UP)
1790 /* The card isn't up. Ignore the packet. */
1793 skb = dev_alloc_skb(skb_len);
1795 dev_err(&card->dev->dev,
1796 " Allocating a socket buffer to interface %s failed\n",
1798 card->stats.rx_dropped++;
1801 memcpy(skb_put(skb, skb_len), skb_data, skb_len);
1802 skb->protocol = card->lan_type_trans(skb, card->dev);
1803 card->stats.rx_bytes += skb_len;
1804 card->stats.rx_packets++;
1805 if (skb->protocol == htons(ETH_P_802_2))
1806 *((__u32 *)skb->cb) = ++card->pkt_seq;
1811 * LCS main routine to get packets and lancmd replies from the buffers
1814 lcs_get_frames_cb(struct lcs_channel *channel, struct lcs_buffer *buffer)
1816 struct lcs_card *card;
1817 struct lcs_header *lcs_hdr;
1820 LCS_DBF_TEXT(5, trace, "lcsgtpkt");
1821 lcs_hdr = (struct lcs_header *) buffer->data;
1822 if (lcs_hdr->offset == LCS_ILLEGAL_OFFSET) {
1823 LCS_DBF_TEXT(4, trace, "-eiogpkt");
1826 card = container_of(channel, struct lcs_card, read);
1828 while (lcs_hdr->offset != 0) {
1829 if (lcs_hdr->offset <= 0 ||
1830 lcs_hdr->offset > LCS_IOBUFFERSIZE ||
1831 lcs_hdr->offset < offset) {
1832 /* Offset invalid. */
1833 card->stats.rx_length_errors++;
1834 card->stats.rx_errors++;
1837 /* What kind of frame is it? */
1838 if (lcs_hdr->type == LCS_FRAME_TYPE_CONTROL)
1839 /* Control frame. */
1840 lcs_get_control(card, (struct lcs_cmd *) lcs_hdr);
1841 else if (lcs_hdr->type == LCS_FRAME_TYPE_ENET ||
1842 lcs_hdr->type == LCS_FRAME_TYPE_TR ||
1843 lcs_hdr->type == LCS_FRAME_TYPE_FDDI)
1844 /* Normal network packet. */
1845 lcs_get_skb(card, (char *)(lcs_hdr + 1),
1846 lcs_hdr->offset - offset -
1847 sizeof(struct lcs_header));
1849 /* Unknown frame type. */
1850 ; // FIXME: error message ?
1851 /* Proceed to next frame. */
1852 offset = lcs_hdr->offset;
1853 lcs_hdr->offset = LCS_ILLEGAL_OFFSET;
1854 lcs_hdr = (struct lcs_header *) (buffer->data + offset);
1856 /* The buffer is now empty. Make it ready again. */
1857 lcs_ready_buffer(&card->read, buffer);
1861 * get network statistics for ifconfig and other user programs
1863 static struct net_device_stats *
1864 lcs_getstats(struct net_device *dev)
1866 struct lcs_card *card;
1868 LCS_DBF_TEXT(4, trace, "netstats");
1869 card = (struct lcs_card *) dev->ml_priv;
1870 return &card->stats;
1875 * This function will be called by user doing ifconfig xxx down
1878 lcs_stop_device(struct net_device *dev)
1880 struct lcs_card *card;
1883 LCS_DBF_TEXT(2, trace, "stopdev");
1884 card = (struct lcs_card *) dev->ml_priv;
1885 netif_carrier_off(dev);
1886 netif_tx_disable(dev);
1887 dev->flags &= ~IFF_UP;
1888 wait_event(card->write.wait_q,
1889 (card->write.state != LCS_CH_STATE_RUNNING));
1890 rc = lcs_stopcard(card);
1892 dev_err(&card->dev->dev,
1893 " Shutting down the LCS device failed\n ");
1898 * start lcs device and make it runnable
1899 * This function will be called by user doing ifconfig xxx up
1902 lcs_open_device(struct net_device *dev)
1904 struct lcs_card *card;
1907 LCS_DBF_TEXT(2, trace, "opendev");
1908 card = (struct lcs_card *) dev->ml_priv;
1909 /* initialize statistics */
1910 rc = lcs_detect(card);
1912 pr_err("Error in opening device!\n");
1915 dev->flags |= IFF_UP;
1916 netif_carrier_on(dev);
1917 netif_wake_queue(dev);
1918 card->state = DEV_STATE_UP;
1924 * show function for portno called by cat or similar things
1927 lcs_portno_show (struct device *dev, struct device_attribute *attr, char *buf)
1929 struct lcs_card *card;
1931 card = dev_get_drvdata(dev);
1936 return sprintf(buf, "%d\n", card->portno);
1940 * store the value which is piped to file portno
1943 lcs_portno_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1945 struct lcs_card *card;
1948 card = dev_get_drvdata(dev);
1953 rc = sscanf(buf, "%d", &value);
1956 /* TODO: sanity checks */
1957 card->portno = value;
1963 static DEVICE_ATTR(portno, 0644, lcs_portno_show, lcs_portno_store);
1965 static const char *lcs_type[] = {
1970 "unknown channel type",
1971 "unsupported channel type",
1975 lcs_type_show(struct device *dev, struct device_attribute *attr, char *buf)
1977 struct ccwgroup_device *cgdev;
1979 cgdev = to_ccwgroupdev(dev);
1983 return sprintf(buf, "%s\n", lcs_type[cgdev->cdev[0]->id.driver_info]);
1986 static DEVICE_ATTR(type, 0444, lcs_type_show, NULL);
1989 lcs_timeout_show(struct device *dev, struct device_attribute *attr, char *buf)
1991 struct lcs_card *card;
1993 card = dev_get_drvdata(dev);
1995 return card ? sprintf(buf, "%u\n", card->lancmd_timeout) : 0;
1999 lcs_timeout_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
2001 struct lcs_card *card;
2005 card = dev_get_drvdata(dev);
2010 rc = sscanf(buf, "%u", &value);
2013 /* TODO: sanity checks */
2014 card->lancmd_timeout = value;
2020 static DEVICE_ATTR(lancmd_timeout, 0644, lcs_timeout_show, lcs_timeout_store);
2023 lcs_dev_recover_store(struct device *dev, struct device_attribute *attr,
2024 const char *buf, size_t count)
2026 struct lcs_card *card = dev_get_drvdata(dev);
2032 if (card->state != DEV_STATE_UP)
2034 i = simple_strtoul(buf, &tmp, 16);
2036 lcs_schedule_recovery(card);
2040 static DEVICE_ATTR(recover, 0200, NULL, lcs_dev_recover_store);
2042 static struct attribute * lcs_attrs[] = {
2043 &dev_attr_portno.attr,
2044 &dev_attr_type.attr,
2045 &dev_attr_lancmd_timeout.attr,
2046 &dev_attr_recover.attr,
2049 static struct attribute_group lcs_attr_group = {
2052 static const struct attribute_group *lcs_attr_groups[] = {
2056 static const struct device_type lcs_devtype = {
2058 .groups = lcs_attr_groups,
2062 * lcs_probe_device is called on establishing a new ccwgroup_device.
2065 lcs_probe_device(struct ccwgroup_device *ccwgdev)
2067 struct lcs_card *card;
2069 if (!get_device(&ccwgdev->dev))
2072 LCS_DBF_TEXT(2, setup, "add_dev");
2073 card = lcs_alloc_card();
2075 LCS_DBF_TEXT_(2, setup, " rc%d", -ENOMEM);
2076 put_device(&ccwgdev->dev);
2079 dev_set_drvdata(&ccwgdev->dev, card);
2080 ccwgdev->cdev[0]->handler = lcs_irq;
2081 ccwgdev->cdev[1]->handler = lcs_irq;
2082 card->gdev = ccwgdev;
2083 INIT_WORK(&card->kernel_thread_starter, lcs_start_kernel_thread);
2084 card->thread_start_mask = 0;
2085 card->thread_allowed_mask = 0;
2086 card->thread_running_mask = 0;
2087 ccwgdev->dev.type = &lcs_devtype;
2093 lcs_register_netdev(struct ccwgroup_device *ccwgdev)
2095 struct lcs_card *card;
2097 LCS_DBF_TEXT(2, setup, "regnetdv");
2098 card = dev_get_drvdata(&ccwgdev->dev);
2099 if (card->dev->reg_state != NETREG_UNINITIALIZED)
2101 SET_NETDEV_DEV(card->dev, &ccwgdev->dev);
2102 return register_netdev(card->dev);
2106 * lcs_new_device will be called by setting the group device online.
2108 static const struct net_device_ops lcs_netdev_ops = {
2109 .ndo_open = lcs_open_device,
2110 .ndo_stop = lcs_stop_device,
2111 .ndo_get_stats = lcs_getstats,
2112 .ndo_start_xmit = lcs_start_xmit,
2115 static const struct net_device_ops lcs_mc_netdev_ops = {
2116 .ndo_open = lcs_open_device,
2117 .ndo_stop = lcs_stop_device,
2118 .ndo_get_stats = lcs_getstats,
2119 .ndo_start_xmit = lcs_start_xmit,
2120 .ndo_set_rx_mode = lcs_set_multicast_list,
2124 lcs_new_device(struct ccwgroup_device *ccwgdev)
2126 struct lcs_card *card;
2127 struct net_device *dev=NULL;
2128 enum lcs_dev_states recover_state;
2131 card = dev_get_drvdata(&ccwgdev->dev);
2135 LCS_DBF_TEXT(2, setup, "newdev");
2136 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
2137 card->read.ccwdev = ccwgdev->cdev[0];
2138 card->write.ccwdev = ccwgdev->cdev[1];
2140 recover_state = card->state;
2141 rc = ccw_device_set_online(card->read.ccwdev);
2144 rc = ccw_device_set_online(card->write.ccwdev);
2148 LCS_DBF_TEXT(3, setup, "lcsnewdv");
2150 lcs_setup_card(card);
2151 rc = lcs_detect(card);
2153 LCS_DBF_TEXT(2, setup, "dtctfail");
2154 dev_err(&card->dev->dev,
2155 "Detecting a network adapter for LCS devices"
2156 " failed with rc=%d (0x%x)\n", rc, rc);
2161 LCS_DBF_TEXT(2, setup, "samedev");
2162 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
2165 switch (card->lan_type) {
2166 #ifdef CONFIG_ETHERNET
2167 case LCS_FRAME_TYPE_ENET:
2168 card->lan_type_trans = eth_type_trans;
2169 dev = alloc_etherdev(0);
2173 case LCS_FRAME_TYPE_FDDI:
2174 card->lan_type_trans = fddi_type_trans;
2175 dev = alloc_fddidev(0);
2179 LCS_DBF_TEXT(3, setup, "errinit");
2180 pr_err(" Initialization failed\n");
2186 card->dev->ml_priv = card;
2187 card->dev->netdev_ops = &lcs_netdev_ops;
2188 memcpy(card->dev->dev_addr, card->mac, LCS_MAC_LENGTH);
2189 #ifdef CONFIG_IP_MULTICAST
2190 if (!lcs_check_multicast_support(card))
2191 card->dev->netdev_ops = &lcs_mc_netdev_ops;
2194 lcs_set_allowed_threads(card,0xffffffff);
2195 if (recover_state == DEV_STATE_RECOVER) {
2196 lcs_set_multicast_list(card->dev);
2197 card->dev->flags |= IFF_UP;
2198 netif_carrier_on(card->dev);
2199 netif_wake_queue(card->dev);
2200 card->state = DEV_STATE_UP;
2205 if (lcs_register_netdev(ccwgdev) != 0)
2208 /* Print out supported assists: IPv6 */
2209 pr_info("LCS device %s %s IPv6 support\n", card->dev->name,
2210 (card->ip_assists_supported & LCS_IPASS_IPV6_SUPPORT) ?
2211 "with" : "without");
2212 /* Print out supported assist: Multicast */
2213 pr_info("LCS device %s %s Multicast support\n", card->dev->name,
2214 (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) ?
2215 "with" : "without");
2219 ccw_device_set_offline(card->write.ccwdev);
2221 ccw_device_set_offline(card->read.ccwdev);
2227 * lcs_shutdown_device, called when setting the group device offline.
2230 __lcs_shutdown_device(struct ccwgroup_device *ccwgdev, int recovery_mode)
2232 struct lcs_card *card;
2233 enum lcs_dev_states recover_state;
2234 int ret = 0, ret2 = 0, ret3 = 0;
2236 LCS_DBF_TEXT(3, setup, "shtdndev");
2237 card = dev_get_drvdata(&ccwgdev->dev);
2240 if (recovery_mode == 0) {
2241 lcs_set_allowed_threads(card, 0);
2242 if (lcs_wait_for_threads(card, LCS_SET_MC_THREAD))
2243 return -ERESTARTSYS;
2245 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
2246 recover_state = card->state;
2248 ret = lcs_stop_device(card->dev);
2249 ret2 = ccw_device_set_offline(card->read.ccwdev);
2250 ret3 = ccw_device_set_offline(card->write.ccwdev);
2252 ret = (ret2) ? ret2 : ret3;
2254 LCS_DBF_TEXT_(3, setup, "1err:%d", ret);
2255 if (recover_state == DEV_STATE_UP) {
2256 card->state = DEV_STATE_RECOVER;
2262 lcs_shutdown_device(struct ccwgroup_device *ccwgdev)
2264 return __lcs_shutdown_device(ccwgdev, 0);
2268 * drive lcs recovery after startup and startlan initiated by Lan Gateway
2271 lcs_recovery(void *ptr)
2273 struct lcs_card *card;
2274 struct ccwgroup_device *gdev;
2277 card = (struct lcs_card *) ptr;
2279 LCS_DBF_TEXT(4, trace, "recover1");
2280 if (!lcs_do_run_thread(card, LCS_RECOVERY_THREAD))
2282 LCS_DBF_TEXT(4, trace, "recover2");
2284 dev_warn(&gdev->dev,
2285 "A recovery process has been started for the LCS device\n");
2286 rc = __lcs_shutdown_device(gdev, 1);
2287 rc = lcs_new_device(gdev);
2289 pr_info("Device %s successfully recovered!\n",
2292 pr_info("Device %s could not be recovered!\n",
2294 lcs_clear_thread_running_bit(card, LCS_RECOVERY_THREAD);
2299 * lcs_remove_device, free buffers and card
2302 lcs_remove_device(struct ccwgroup_device *ccwgdev)
2304 struct lcs_card *card;
2306 card = dev_get_drvdata(&ccwgdev->dev);
2310 LCS_DBF_TEXT(3, setup, "remdev");
2311 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
2312 if (ccwgdev->state == CCWGROUP_ONLINE) {
2313 lcs_shutdown_device(ccwgdev);
2316 unregister_netdev(card->dev);
2317 lcs_cleanup_card(card);
2318 lcs_free_card(card);
2319 dev_set_drvdata(&ccwgdev->dev, NULL);
2320 put_device(&ccwgdev->dev);
2323 static int lcs_pm_suspend(struct lcs_card *card)
2326 netif_device_detach(card->dev);
2327 lcs_set_allowed_threads(card, 0);
2328 lcs_wait_for_threads(card, 0xffffffff);
2329 if (card->state != DEV_STATE_DOWN)
2330 __lcs_shutdown_device(card->gdev, 1);
2334 static int lcs_pm_resume(struct lcs_card *card)
2338 if (card->state == DEV_STATE_RECOVER)
2339 rc = lcs_new_device(card->gdev);
2341 netif_device_attach(card->dev);
2343 dev_warn(&card->gdev->dev, "The lcs device driver "
2344 "failed to recover the device\n");
2349 static int lcs_prepare(struct ccwgroup_device *gdev)
2354 static void lcs_complete(struct ccwgroup_device *gdev)
2359 static int lcs_freeze(struct ccwgroup_device *gdev)
2361 struct lcs_card *card = dev_get_drvdata(&gdev->dev);
2362 return lcs_pm_suspend(card);
2365 static int lcs_thaw(struct ccwgroup_device *gdev)
2367 struct lcs_card *card = dev_get_drvdata(&gdev->dev);
2368 return lcs_pm_resume(card);
2371 static int lcs_restore(struct ccwgroup_device *gdev)
2373 struct lcs_card *card = dev_get_drvdata(&gdev->dev);
2374 return lcs_pm_resume(card);
2377 static struct ccw_device_id lcs_ids[] = {
2378 {CCW_DEVICE(0x3088, 0x08), .driver_info = lcs_channel_type_parallel},
2379 {CCW_DEVICE(0x3088, 0x1f), .driver_info = lcs_channel_type_2216},
2380 {CCW_DEVICE(0x3088, 0x60), .driver_info = lcs_channel_type_osa2},
2383 MODULE_DEVICE_TABLE(ccw, lcs_ids);
2385 static struct ccw_driver lcs_ccw_driver = {
2387 .owner = THIS_MODULE,
2391 .probe = ccwgroup_probe_ccwdev,
2392 .remove = ccwgroup_remove_ccwdev,
2393 .int_class = IRQIO_LCS,
2397 * LCS ccwgroup driver registration
2399 static struct ccwgroup_driver lcs_group_driver = {
2401 .owner = THIS_MODULE,
2404 .setup = lcs_probe_device,
2405 .remove = lcs_remove_device,
2406 .set_online = lcs_new_device,
2407 .set_offline = lcs_shutdown_device,
2408 .prepare = lcs_prepare,
2409 .complete = lcs_complete,
2410 .freeze = lcs_freeze,
2412 .restore = lcs_restore,
2415 static ssize_t lcs_driver_group_store(struct device_driver *ddrv,
2416 const char *buf, size_t count)
2419 err = ccwgroup_create_dev(lcs_root_dev, &lcs_group_driver, 2, buf);
2420 return err ? err : count;
2422 static DRIVER_ATTR(group, 0200, NULL, lcs_driver_group_store);
2424 static struct attribute *lcs_drv_attrs[] = {
2425 &driver_attr_group.attr,
2428 static struct attribute_group lcs_drv_attr_group = {
2429 .attrs = lcs_drv_attrs,
2431 static const struct attribute_group *lcs_drv_attr_groups[] = {
2432 &lcs_drv_attr_group,
2437 * LCS Module/Kernel initialization function
2440 __init lcs_init_module(void)
2444 pr_info("Loading %s\n", version);
2445 rc = lcs_register_debug_facility();
2446 LCS_DBF_TEXT(0, setup, "lcsinit");
2449 lcs_root_dev = root_device_register("lcs");
2450 rc = PTR_ERR_OR_ZERO(lcs_root_dev);
2453 rc = ccw_driver_register(&lcs_ccw_driver);
2456 lcs_group_driver.driver.groups = lcs_drv_attr_groups;
2457 rc = ccwgroup_driver_register(&lcs_group_driver);
2463 ccw_driver_unregister(&lcs_ccw_driver);
2465 root_device_unregister(lcs_root_dev);
2467 lcs_unregister_debug_facility();
2469 pr_err("Initializing the lcs device driver failed\n");
2475 * LCS module cleanup function
2478 __exit lcs_cleanup_module(void)
2480 pr_info("Terminating lcs module.\n");
2481 LCS_DBF_TEXT(0, trace, "cleanup");
2482 ccwgroup_driver_unregister(&lcs_group_driver);
2483 ccw_driver_unregister(&lcs_ccw_driver);
2484 root_device_unregister(lcs_root_dev);
2485 lcs_unregister_debug_facility();
2488 module_init(lcs_init_module);
2489 module_exit(lcs_cleanup_module);
2491 MODULE_AUTHOR("Frank Pavlic <fpavlic@de.ibm.com>");
2492 MODULE_LICENSE("GPL");