1 // SPDX-License-Identifier: GPL-2.0+
3 * Linux for S/390 Lan Channel Station Network Driver
5 * Copyright IBM Corp. 1999, 2009
6 * Author(s): Original Code written by
7 * DJ Barrow <djbarrow@de.ibm.com,barrow_dj@yahoo.com>
9 * Frank Pavlic <fpavlic@de.ibm.com> and
10 * Martin Schwidefsky <schwidefsky@de.ibm.com>
13 #define KMSG_COMPONENT "lcs"
14 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
16 #include <linux/module.h>
18 #include <linux/netdevice.h>
19 #include <linux/etherdevice.h>
20 #include <linux/fddidevice.h>
21 #include <linux/inetdevice.h>
23 #include <linux/igmp.h>
24 #include <linux/delay.h>
25 #include <linux/kthread.h>
26 #include <linux/slab.h>
30 #include <asm/debug.h>
31 #include <asm/idals.h>
32 #include <asm/timex.h>
33 #include <linux/device.h>
34 #include <asm/ccwgroup.h>
39 #if !defined(CONFIG_ETHERNET) && !defined(CONFIG_FDDI)
40 #error Cannot compile lcs.c without some net devices switched on.
44 * initialization string for output
47 static char version[] __initdata = "LCS driver";
50 * the root device for lcs group devices
52 static struct device *lcs_root_dev;
57 static void lcs_tasklet(unsigned long);
58 static void lcs_start_kernel_thread(struct work_struct *);
59 static void lcs_get_frames_cb(struct lcs_channel *, struct lcs_buffer *);
60 #ifdef CONFIG_IP_MULTICAST
61 static int lcs_send_delipm(struct lcs_card *, struct lcs_ipm_list *);
62 #endif /* CONFIG_IP_MULTICAST */
63 static int lcs_recovery(void *ptr);
66 * Debug Facility Stuff
68 static char debug_buffer[255];
69 static debug_info_t *lcs_dbf_setup;
70 static debug_info_t *lcs_dbf_trace;
73 * LCS Debug Facility functions
76 lcs_unregister_debug_facility(void)
78 debug_unregister(lcs_dbf_setup);
79 debug_unregister(lcs_dbf_trace);
83 lcs_register_debug_facility(void)
85 lcs_dbf_setup = debug_register("lcs_setup", 2, 1, 8);
86 lcs_dbf_trace = debug_register("lcs_trace", 4, 1, 8);
87 if (lcs_dbf_setup == NULL || lcs_dbf_trace == NULL) {
88 pr_err("Not enough memory for debug facility.\n");
89 lcs_unregister_debug_facility();
92 debug_register_view(lcs_dbf_setup, &debug_hex_ascii_view);
93 debug_set_level(lcs_dbf_setup, 2);
94 debug_register_view(lcs_dbf_trace, &debug_hex_ascii_view);
95 debug_set_level(lcs_dbf_trace, 2);
100 * Allocate io buffers.
103 lcs_alloc_channel(struct lcs_channel *channel)
107 LCS_DBF_TEXT(2, setup, "ichalloc");
108 for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
109 /* alloc memory fo iobuffer */
110 channel->iob[cnt].data =
111 kzalloc(LCS_IOBUFFERSIZE, GFP_DMA | GFP_KERNEL);
112 if (channel->iob[cnt].data == NULL)
114 channel->iob[cnt].state = LCS_BUF_STATE_EMPTY;
116 if (cnt < LCS_NUM_BUFFS) {
117 /* Not all io buffers could be allocated. */
118 LCS_DBF_TEXT(2, setup, "echalloc");
120 kfree(channel->iob[cnt].data);
130 lcs_free_channel(struct lcs_channel *channel)
134 LCS_DBF_TEXT(2, setup, "ichfree");
135 for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
136 kfree(channel->iob[cnt].data);
137 channel->iob[cnt].data = NULL;
145 lcs_cleanup_channel(struct lcs_channel *channel)
147 LCS_DBF_TEXT(3, setup, "cleanch");
148 /* Kill write channel tasklets. */
149 tasklet_kill(&channel->irq_tasklet);
150 /* Free channel buffers. */
151 lcs_free_channel(channel);
155 * LCS free memory for card and channels.
158 lcs_free_card(struct lcs_card *card)
160 LCS_DBF_TEXT(2, setup, "remcard");
161 LCS_DBF_HEX(2, setup, &card, sizeof(void*));
166 * LCS alloc memory for card and channels
168 static struct lcs_card *
171 struct lcs_card *card;
174 LCS_DBF_TEXT(2, setup, "alloclcs");
176 card = kzalloc(sizeof(struct lcs_card), GFP_KERNEL | GFP_DMA);
179 card->lan_type = LCS_FRAME_TYPE_AUTO;
181 card->lancmd_timeout = LCS_LANCMD_TIMEOUT_DEFAULT;
182 /* Allocate io buffers for the read channel. */
183 rc = lcs_alloc_channel(&card->read);
185 LCS_DBF_TEXT(2, setup, "iccwerr");
189 /* Allocate io buffers for the write channel. */
190 rc = lcs_alloc_channel(&card->write);
192 LCS_DBF_TEXT(2, setup, "iccwerr");
193 lcs_cleanup_channel(&card->read);
198 #ifdef CONFIG_IP_MULTICAST
199 INIT_LIST_HEAD(&card->ipm_list);
201 LCS_DBF_HEX(2, setup, &card, sizeof(void*));
206 * Setup read channel.
209 lcs_setup_read_ccws(struct lcs_card *card)
213 LCS_DBF_TEXT(2, setup, "ireadccw");
214 /* Setup read ccws. */
215 memset(card->read.ccws, 0, sizeof (struct ccw1) * (LCS_NUM_BUFFS + 1));
216 for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
217 card->read.ccws[cnt].cmd_code = LCS_CCW_READ;
218 card->read.ccws[cnt].count = LCS_IOBUFFERSIZE;
219 card->read.ccws[cnt].flags =
220 CCW_FLAG_CC | CCW_FLAG_SLI | CCW_FLAG_PCI;
222 * Note: we have allocated the buffer with GFP_DMA, so
223 * we do not need to do set_normalized_cda.
225 card->read.ccws[cnt].cda =
226 (__u32) __pa(card->read.iob[cnt].data);
227 ((struct lcs_header *)
228 card->read.iob[cnt].data)->offset = LCS_ILLEGAL_OFFSET;
229 card->read.iob[cnt].callback = lcs_get_frames_cb;
230 card->read.iob[cnt].state = LCS_BUF_STATE_READY;
231 card->read.iob[cnt].count = LCS_IOBUFFERSIZE;
233 card->read.ccws[0].flags &= ~CCW_FLAG_PCI;
234 card->read.ccws[LCS_NUM_BUFFS - 1].flags &= ~CCW_FLAG_PCI;
235 card->read.ccws[LCS_NUM_BUFFS - 1].flags |= CCW_FLAG_SUSPEND;
236 /* Last ccw is a tic (transfer in channel). */
237 card->read.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER;
238 card->read.ccws[LCS_NUM_BUFFS].cda =
239 (__u32) __pa(card->read.ccws);
240 /* Setg initial state of the read channel. */
241 card->read.state = LCS_CH_STATE_INIT;
243 card->read.io_idx = 0;
244 card->read.buf_idx = 0;
248 lcs_setup_read(struct lcs_card *card)
250 LCS_DBF_TEXT(3, setup, "initread");
252 lcs_setup_read_ccws(card);
253 /* Initialize read channel tasklet. */
254 card->read.irq_tasklet.data = (unsigned long) &card->read;
255 card->read.irq_tasklet.func = lcs_tasklet;
256 /* Initialize waitqueue. */
257 init_waitqueue_head(&card->read.wait_q);
261 * Setup write channel.
264 lcs_setup_write_ccws(struct lcs_card *card)
268 LCS_DBF_TEXT(3, setup, "iwritccw");
269 /* Setup write ccws. */
270 memset(card->write.ccws, 0, sizeof(struct ccw1) * (LCS_NUM_BUFFS + 1));
271 for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
272 card->write.ccws[cnt].cmd_code = LCS_CCW_WRITE;
273 card->write.ccws[cnt].count = 0;
274 card->write.ccws[cnt].flags =
275 CCW_FLAG_SUSPEND | CCW_FLAG_CC | CCW_FLAG_SLI;
277 * Note: we have allocated the buffer with GFP_DMA, so
278 * we do not need to do set_normalized_cda.
280 card->write.ccws[cnt].cda =
281 (__u32) __pa(card->write.iob[cnt].data);
283 /* Last ccw is a tic (transfer in channel). */
284 card->write.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER;
285 card->write.ccws[LCS_NUM_BUFFS].cda =
286 (__u32) __pa(card->write.ccws);
287 /* Set initial state of the write channel. */
288 card->read.state = LCS_CH_STATE_INIT;
290 card->write.io_idx = 0;
291 card->write.buf_idx = 0;
295 lcs_setup_write(struct lcs_card *card)
297 LCS_DBF_TEXT(3, setup, "initwrit");
299 lcs_setup_write_ccws(card);
300 /* Initialize write channel tasklet. */
301 card->write.irq_tasklet.data = (unsigned long) &card->write;
302 card->write.irq_tasklet.func = lcs_tasklet;
303 /* Initialize waitqueue. */
304 init_waitqueue_head(&card->write.wait_q);
308 lcs_set_allowed_threads(struct lcs_card *card, unsigned long threads)
312 spin_lock_irqsave(&card->mask_lock, flags);
313 card->thread_allowed_mask = threads;
314 spin_unlock_irqrestore(&card->mask_lock, flags);
315 wake_up(&card->wait_q);
317 static int lcs_threads_running(struct lcs_card *card, unsigned long threads)
322 spin_lock_irqsave(&card->mask_lock, flags);
323 rc = (card->thread_running_mask & threads);
324 spin_unlock_irqrestore(&card->mask_lock, flags);
329 lcs_wait_for_threads(struct lcs_card *card, unsigned long threads)
331 return wait_event_interruptible(card->wait_q,
332 lcs_threads_running(card, threads) == 0);
335 static int lcs_set_thread_start_bit(struct lcs_card *card, unsigned long thread)
339 spin_lock_irqsave(&card->mask_lock, flags);
340 if ( !(card->thread_allowed_mask & thread) ||
341 (card->thread_start_mask & thread) ) {
342 spin_unlock_irqrestore(&card->mask_lock, flags);
345 card->thread_start_mask |= thread;
346 spin_unlock_irqrestore(&card->mask_lock, flags);
351 lcs_clear_thread_running_bit(struct lcs_card *card, unsigned long thread)
355 spin_lock_irqsave(&card->mask_lock, flags);
356 card->thread_running_mask &= ~thread;
357 spin_unlock_irqrestore(&card->mask_lock, flags);
358 wake_up(&card->wait_q);
361 static int __lcs_do_run_thread(struct lcs_card *card, unsigned long thread)
366 spin_lock_irqsave(&card->mask_lock, flags);
367 if (card->thread_start_mask & thread){
368 if ((card->thread_allowed_mask & thread) &&
369 !(card->thread_running_mask & thread)){
371 card->thread_start_mask &= ~thread;
372 card->thread_running_mask |= thread;
376 spin_unlock_irqrestore(&card->mask_lock, flags);
381 lcs_do_run_thread(struct lcs_card *card, unsigned long thread)
384 wait_event(card->wait_q,
385 (rc = __lcs_do_run_thread(card, thread)) >= 0);
390 lcs_do_start_thread(struct lcs_card *card, unsigned long thread)
395 spin_lock_irqsave(&card->mask_lock, flags);
396 LCS_DBF_TEXT_(4, trace, " %02x%02x%02x",
397 (u8) card->thread_start_mask,
398 (u8) card->thread_allowed_mask,
399 (u8) card->thread_running_mask);
400 rc = (card->thread_start_mask & thread);
401 spin_unlock_irqrestore(&card->mask_lock, flags);
406 * Initialize channels,card and state machines.
409 lcs_setup_card(struct lcs_card *card)
411 LCS_DBF_TEXT(2, setup, "initcard");
412 LCS_DBF_HEX(2, setup, &card, sizeof(void*));
414 lcs_setup_read(card);
415 lcs_setup_write(card);
416 /* Set cards initial state. */
417 card->state = DEV_STATE_DOWN;
418 card->tx_buffer = NULL;
419 card->tx_emitted = 0;
421 init_waitqueue_head(&card->wait_q);
422 spin_lock_init(&card->lock);
423 spin_lock_init(&card->ipm_lock);
424 spin_lock_init(&card->mask_lock);
425 #ifdef CONFIG_IP_MULTICAST
426 INIT_LIST_HEAD(&card->ipm_list);
428 INIT_LIST_HEAD(&card->lancmd_waiters);
431 static void lcs_clear_multicast_list(struct lcs_card *card)
433 #ifdef CONFIG_IP_MULTICAST
434 struct lcs_ipm_list *ipm;
437 /* Free multicast list. */
438 LCS_DBF_TEXT(3, setup, "clmclist");
439 spin_lock_irqsave(&card->ipm_lock, flags);
440 while (!list_empty(&card->ipm_list)){
441 ipm = list_entry(card->ipm_list.next,
442 struct lcs_ipm_list, list);
443 list_del(&ipm->list);
444 if (ipm->ipm_state != LCS_IPM_STATE_SET_REQUIRED){
445 spin_unlock_irqrestore(&card->ipm_lock, flags);
446 lcs_send_delipm(card, ipm);
447 spin_lock_irqsave(&card->ipm_lock, flags);
451 spin_unlock_irqrestore(&card->ipm_lock, flags);
455 * Cleanup channels,card and state machines.
458 lcs_cleanup_card(struct lcs_card *card)
461 LCS_DBF_TEXT(3, setup, "cleancrd");
462 LCS_DBF_HEX(2,setup,&card,sizeof(void*));
464 if (card->dev != NULL)
465 free_netdev(card->dev);
466 /* Cleanup channels. */
467 lcs_cleanup_channel(&card->write);
468 lcs_cleanup_channel(&card->read);
475 lcs_start_channel(struct lcs_channel *channel)
480 LCS_DBF_TEXT_(4, trace,"ssch%s", dev_name(&channel->ccwdev->dev));
481 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
482 rc = ccw_device_start(channel->ccwdev,
483 channel->ccws + channel->io_idx, 0, 0,
484 DOIO_DENY_PREFETCH | DOIO_ALLOW_SUSPEND);
486 channel->state = LCS_CH_STATE_RUNNING;
487 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
489 LCS_DBF_TEXT_(4,trace,"essh%s",
490 dev_name(&channel->ccwdev->dev));
491 dev_err(&channel->ccwdev->dev,
492 "Starting an LCS device resulted in an error,"
499 lcs_clear_channel(struct lcs_channel *channel)
504 LCS_DBF_TEXT(4,trace,"clearch");
505 LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev));
506 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
507 rc = ccw_device_clear(channel->ccwdev, 0);
508 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
510 LCS_DBF_TEXT_(4, trace, "ecsc%s",
511 dev_name(&channel->ccwdev->dev));
514 wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_CLEARED));
515 channel->state = LCS_CH_STATE_STOPPED;
524 lcs_stop_channel(struct lcs_channel *channel)
529 if (channel->state == LCS_CH_STATE_STOPPED)
531 LCS_DBF_TEXT(4,trace,"haltsch");
532 LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev));
533 channel->state = LCS_CH_STATE_INIT;
534 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
535 rc = ccw_device_halt(channel->ccwdev, 0);
536 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
538 LCS_DBF_TEXT_(4, trace, "ehsc%s",
539 dev_name(&channel->ccwdev->dev));
542 /* Asynchronous halt initialted. Wait for its completion. */
543 wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_HALTED));
544 lcs_clear_channel(channel);
549 * start read and write channel
552 lcs_start_channels(struct lcs_card *card)
556 LCS_DBF_TEXT(2, trace, "chstart");
557 /* start read channel */
558 rc = lcs_start_channel(&card->read);
561 /* start write channel */
562 rc = lcs_start_channel(&card->write);
564 lcs_stop_channel(&card->read);
569 * stop read and write channel
572 lcs_stop_channels(struct lcs_card *card)
574 LCS_DBF_TEXT(2, trace, "chhalt");
575 lcs_stop_channel(&card->read);
576 lcs_stop_channel(&card->write);
583 static struct lcs_buffer *
584 __lcs_get_buffer(struct lcs_channel *channel)
588 LCS_DBF_TEXT(5, trace, "_getbuff");
589 index = channel->io_idx;
591 if (channel->iob[index].state == LCS_BUF_STATE_EMPTY) {
592 channel->iob[index].state = LCS_BUF_STATE_LOCKED;
593 return channel->iob + index;
595 index = (index + 1) & (LCS_NUM_BUFFS - 1);
596 } while (index != channel->io_idx);
600 static struct lcs_buffer *
601 lcs_get_buffer(struct lcs_channel *channel)
603 struct lcs_buffer *buffer;
606 LCS_DBF_TEXT(5, trace, "getbuff");
607 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
608 buffer = __lcs_get_buffer(channel);
609 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
614 * Resume channel program if the channel is suspended.
617 __lcs_resume_channel(struct lcs_channel *channel)
621 if (channel->state != LCS_CH_STATE_SUSPENDED)
623 if (channel->ccws[channel->io_idx].flags & CCW_FLAG_SUSPEND)
625 LCS_DBF_TEXT_(5, trace, "rsch%s", dev_name(&channel->ccwdev->dev));
626 rc = ccw_device_resume(channel->ccwdev);
628 LCS_DBF_TEXT_(4, trace, "ersc%s",
629 dev_name(&channel->ccwdev->dev));
630 dev_err(&channel->ccwdev->dev,
631 "Sending data from the LCS device to the LAN failed"
634 channel->state = LCS_CH_STATE_RUNNING;
640 * Make a buffer ready for processing.
642 static void __lcs_ready_buffer_bits(struct lcs_channel *channel, int index)
646 LCS_DBF_TEXT(5, trace, "rdybits");
647 prev = (index - 1) & (LCS_NUM_BUFFS - 1);
648 next = (index + 1) & (LCS_NUM_BUFFS - 1);
649 /* Check if we may clear the suspend bit of this buffer. */
650 if (channel->ccws[next].flags & CCW_FLAG_SUSPEND) {
651 /* Check if we have to set the PCI bit. */
652 if (!(channel->ccws[prev].flags & CCW_FLAG_SUSPEND))
653 /* Suspend bit of the previous buffer is not set. */
654 channel->ccws[index].flags |= CCW_FLAG_PCI;
655 /* Suspend bit of the next buffer is set. */
656 channel->ccws[index].flags &= ~CCW_FLAG_SUSPEND;
661 lcs_ready_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
666 LCS_DBF_TEXT(5, trace, "rdybuff");
667 BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED &&
668 buffer->state != LCS_BUF_STATE_PROCESSED);
669 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
670 buffer->state = LCS_BUF_STATE_READY;
671 index = buffer - channel->iob;
673 channel->ccws[index].count = buffer->count;
674 /* Check relevant PCI/suspend bits. */
675 __lcs_ready_buffer_bits(channel, index);
676 rc = __lcs_resume_channel(channel);
677 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
682 * Mark the buffer as processed. Take care of the suspend bit
683 * of the previous buffer. This function is called from
684 * interrupt context, so the lock must not be taken.
687 __lcs_processed_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
689 int index, prev, next;
691 LCS_DBF_TEXT(5, trace, "prcsbuff");
692 BUG_ON(buffer->state != LCS_BUF_STATE_READY);
693 buffer->state = LCS_BUF_STATE_PROCESSED;
694 index = buffer - channel->iob;
695 prev = (index - 1) & (LCS_NUM_BUFFS - 1);
696 next = (index + 1) & (LCS_NUM_BUFFS - 1);
697 /* Set the suspend bit and clear the PCI bit of this buffer. */
698 channel->ccws[index].flags |= CCW_FLAG_SUSPEND;
699 channel->ccws[index].flags &= ~CCW_FLAG_PCI;
700 /* Check the suspend bit of the previous buffer. */
701 if (channel->iob[prev].state == LCS_BUF_STATE_READY) {
703 * Previous buffer is in state ready. It might have
704 * happened in lcs_ready_buffer that the suspend bit
705 * has not been cleared to avoid an endless loop.
708 __lcs_ready_buffer_bits(channel, prev);
710 /* Clear PCI bit of next buffer. */
711 channel->ccws[next].flags &= ~CCW_FLAG_PCI;
712 return __lcs_resume_channel(channel);
716 * Put a processed buffer back to state empty.
719 lcs_release_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer)
723 LCS_DBF_TEXT(5, trace, "relbuff");
724 BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED &&
725 buffer->state != LCS_BUF_STATE_PROCESSED);
726 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
727 buffer->state = LCS_BUF_STATE_EMPTY;
728 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
732 * Get buffer for a lan command.
734 static struct lcs_buffer *
735 lcs_get_lancmd(struct lcs_card *card, int count)
737 struct lcs_buffer *buffer;
740 LCS_DBF_TEXT(4, trace, "getlncmd");
741 /* Get buffer and wait if none is available. */
742 wait_event(card->write.wait_q,
743 ((buffer = lcs_get_buffer(&card->write)) != NULL));
744 count += sizeof(struct lcs_header);
745 *(__u16 *)(buffer->data + count) = 0;
746 buffer->count = count + sizeof(__u16);
747 buffer->callback = lcs_release_buffer;
748 cmd = (struct lcs_cmd *) buffer->data;
750 cmd->type = LCS_FRAME_TYPE_CONTROL;
757 lcs_get_reply(struct lcs_reply *reply)
759 refcount_inc(&reply->refcnt);
763 lcs_put_reply(struct lcs_reply *reply)
765 if (refcount_dec_and_test(&reply->refcnt))
769 static struct lcs_reply *
770 lcs_alloc_reply(struct lcs_cmd *cmd)
772 struct lcs_reply *reply;
774 LCS_DBF_TEXT(4, trace, "getreply");
776 reply = kzalloc(sizeof(struct lcs_reply), GFP_ATOMIC);
779 refcount_set(&reply->refcnt, 1);
780 reply->sequence_no = cmd->sequence_no;
783 init_waitqueue_head(&reply->wait_q);
789 * Notifier function for lancmd replies. Called from read irq.
792 lcs_notify_lancmd_waiters(struct lcs_card *card, struct lcs_cmd *cmd)
794 struct list_head *l, *n;
795 struct lcs_reply *reply;
797 LCS_DBF_TEXT(4, trace, "notiwait");
798 spin_lock(&card->lock);
799 list_for_each_safe(l, n, &card->lancmd_waiters) {
800 reply = list_entry(l, struct lcs_reply, list);
801 if (reply->sequence_no == cmd->sequence_no) {
802 lcs_get_reply(reply);
803 list_del_init(&reply->list);
804 if (reply->callback != NULL)
805 reply->callback(card, cmd);
807 reply->rc = cmd->return_code;
808 wake_up(&reply->wait_q);
809 lcs_put_reply(reply);
813 spin_unlock(&card->lock);
817 * Emit buffer of a lan command.
820 lcs_lancmd_timeout(struct timer_list *t)
822 struct lcs_reply *reply = from_timer(reply, t, timer);
823 struct lcs_reply *list_reply, *r;
826 LCS_DBF_TEXT(4, trace, "timeout");
827 spin_lock_irqsave(&reply->card->lock, flags);
828 list_for_each_entry_safe(list_reply, r,
829 &reply->card->lancmd_waiters,list) {
830 if (reply == list_reply) {
831 lcs_get_reply(reply);
832 list_del_init(&reply->list);
833 spin_unlock_irqrestore(&reply->card->lock, flags);
836 wake_up(&reply->wait_q);
837 lcs_put_reply(reply);
841 spin_unlock_irqrestore(&reply->card->lock, flags);
845 lcs_send_lancmd(struct lcs_card *card, struct lcs_buffer *buffer,
846 void (*reply_callback)(struct lcs_card *, struct lcs_cmd *))
848 struct lcs_reply *reply;
853 LCS_DBF_TEXT(4, trace, "sendcmd");
854 cmd = (struct lcs_cmd *) buffer->data;
855 cmd->return_code = 0;
856 cmd->sequence_no = card->sequence_no++;
857 reply = lcs_alloc_reply(cmd);
860 reply->callback = reply_callback;
862 spin_lock_irqsave(&card->lock, flags);
863 list_add_tail(&reply->list, &card->lancmd_waiters);
864 spin_unlock_irqrestore(&card->lock, flags);
866 buffer->callback = lcs_release_buffer;
867 rc = lcs_ready_buffer(&card->write, buffer);
870 timer_setup(&reply->timer, lcs_lancmd_timeout, 0);
871 mod_timer(&reply->timer, jiffies + HZ * card->lancmd_timeout);
872 wait_event(reply->wait_q, reply->received);
873 del_timer_sync(&reply->timer);
874 LCS_DBF_TEXT_(4, trace, "rc:%d",reply->rc);
876 lcs_put_reply(reply);
877 return rc ? -EIO : 0;
881 * LCS startup command
884 lcs_send_startup(struct lcs_card *card, __u8 initiator)
886 struct lcs_buffer *buffer;
889 LCS_DBF_TEXT(2, trace, "startup");
890 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
891 cmd = (struct lcs_cmd *) buffer->data;
892 cmd->cmd_code = LCS_CMD_STARTUP;
893 cmd->initiator = initiator;
894 cmd->cmd.lcs_startup.buff_size = LCS_IOBUFFERSIZE;
895 return lcs_send_lancmd(card, buffer, NULL);
899 * LCS shutdown command
902 lcs_send_shutdown(struct lcs_card *card)
904 struct lcs_buffer *buffer;
907 LCS_DBF_TEXT(2, trace, "shutdown");
908 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
909 cmd = (struct lcs_cmd *) buffer->data;
910 cmd->cmd_code = LCS_CMD_SHUTDOWN;
911 cmd->initiator = LCS_INITIATOR_TCPIP;
912 return lcs_send_lancmd(card, buffer, NULL);
916 * LCS lanstat command
919 __lcs_lanstat_cb(struct lcs_card *card, struct lcs_cmd *cmd)
921 LCS_DBF_TEXT(2, trace, "statcb");
922 memcpy(card->mac, cmd->cmd.lcs_lanstat_cmd.mac_addr, LCS_MAC_LENGTH);
926 lcs_send_lanstat(struct lcs_card *card)
928 struct lcs_buffer *buffer;
931 LCS_DBF_TEXT(2,trace, "cmdstat");
932 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
933 cmd = (struct lcs_cmd *) buffer->data;
934 /* Setup lanstat command. */
935 cmd->cmd_code = LCS_CMD_LANSTAT;
936 cmd->initiator = LCS_INITIATOR_TCPIP;
937 cmd->cmd.lcs_std_cmd.lan_type = card->lan_type;
938 cmd->cmd.lcs_std_cmd.portno = card->portno;
939 return lcs_send_lancmd(card, buffer, __lcs_lanstat_cb);
943 * send stoplan command
946 lcs_send_stoplan(struct lcs_card *card, __u8 initiator)
948 struct lcs_buffer *buffer;
951 LCS_DBF_TEXT(2, trace, "cmdstpln");
952 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
953 cmd = (struct lcs_cmd *) buffer->data;
954 cmd->cmd_code = LCS_CMD_STOPLAN;
955 cmd->initiator = initiator;
956 cmd->cmd.lcs_std_cmd.lan_type = card->lan_type;
957 cmd->cmd.lcs_std_cmd.portno = card->portno;
958 return lcs_send_lancmd(card, buffer, NULL);
962 * send startlan command
965 __lcs_send_startlan_cb(struct lcs_card *card, struct lcs_cmd *cmd)
967 LCS_DBF_TEXT(2, trace, "srtlancb");
968 card->lan_type = cmd->cmd.lcs_std_cmd.lan_type;
969 card->portno = cmd->cmd.lcs_std_cmd.portno;
973 lcs_send_startlan(struct lcs_card *card, __u8 initiator)
975 struct lcs_buffer *buffer;
978 LCS_DBF_TEXT(2, trace, "cmdstaln");
979 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
980 cmd = (struct lcs_cmd *) buffer->data;
981 cmd->cmd_code = LCS_CMD_STARTLAN;
982 cmd->initiator = initiator;
983 cmd->cmd.lcs_std_cmd.lan_type = card->lan_type;
984 cmd->cmd.lcs_std_cmd.portno = card->portno;
985 return lcs_send_lancmd(card, buffer, __lcs_send_startlan_cb);
988 #ifdef CONFIG_IP_MULTICAST
990 * send setipm command (Multicast)
993 lcs_send_setipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list)
995 struct lcs_buffer *buffer;
998 LCS_DBF_TEXT(2, trace, "cmdsetim");
999 buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE);
1000 cmd = (struct lcs_cmd *) buffer->data;
1001 cmd->cmd_code = LCS_CMD_SETIPM;
1002 cmd->initiator = LCS_INITIATOR_TCPIP;
1003 cmd->cmd.lcs_qipassist.lan_type = card->lan_type;
1004 cmd->cmd.lcs_qipassist.portno = card->portno;
1005 cmd->cmd.lcs_qipassist.version = 4;
1006 cmd->cmd.lcs_qipassist.num_ip_pairs = 1;
1007 memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair,
1008 &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair));
1009 LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr);
1010 return lcs_send_lancmd(card, buffer, NULL);
1014 * send delipm command (Multicast)
1017 lcs_send_delipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list)
1019 struct lcs_buffer *buffer;
1020 struct lcs_cmd *cmd;
1022 LCS_DBF_TEXT(2, trace, "cmddelim");
1023 buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE);
1024 cmd = (struct lcs_cmd *) buffer->data;
1025 cmd->cmd_code = LCS_CMD_DELIPM;
1026 cmd->initiator = LCS_INITIATOR_TCPIP;
1027 cmd->cmd.lcs_qipassist.lan_type = card->lan_type;
1028 cmd->cmd.lcs_qipassist.portno = card->portno;
1029 cmd->cmd.lcs_qipassist.version = 4;
1030 cmd->cmd.lcs_qipassist.num_ip_pairs = 1;
1031 memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair,
1032 &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair));
1033 LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr);
1034 return lcs_send_lancmd(card, buffer, NULL);
1038 * check if multicast is supported by LCS
1041 __lcs_check_multicast_cb(struct lcs_card *card, struct lcs_cmd *cmd)
1043 LCS_DBF_TEXT(2, trace, "chkmccb");
1044 card->ip_assists_supported =
1045 cmd->cmd.lcs_qipassist.ip_assists_supported;
1046 card->ip_assists_enabled =
1047 cmd->cmd.lcs_qipassist.ip_assists_enabled;
1051 lcs_check_multicast_support(struct lcs_card *card)
1053 struct lcs_buffer *buffer;
1054 struct lcs_cmd *cmd;
1057 LCS_DBF_TEXT(2, trace, "cmdqipa");
1058 /* Send query ipassist. */
1059 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
1060 cmd = (struct lcs_cmd *) buffer->data;
1061 cmd->cmd_code = LCS_CMD_QIPASSIST;
1062 cmd->initiator = LCS_INITIATOR_TCPIP;
1063 cmd->cmd.lcs_qipassist.lan_type = card->lan_type;
1064 cmd->cmd.lcs_qipassist.portno = card->portno;
1065 cmd->cmd.lcs_qipassist.version = 4;
1066 cmd->cmd.lcs_qipassist.num_ip_pairs = 1;
1067 rc = lcs_send_lancmd(card, buffer, __lcs_check_multicast_cb);
1069 pr_err("Query IPAssist failed. Assuming unsupported!\n");
1072 if (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT)
1078 * set or del multicast address on LCS card
1081 lcs_fix_multicast_list(struct lcs_card *card)
1083 struct list_head failed_list;
1084 struct lcs_ipm_list *ipm, *tmp;
1085 unsigned long flags;
1088 LCS_DBF_TEXT(4,trace, "fixipm");
1089 INIT_LIST_HEAD(&failed_list);
1090 spin_lock_irqsave(&card->ipm_lock, flags);
1092 list_for_each_entry_safe(ipm, tmp, &card->ipm_list, list){
1093 switch (ipm->ipm_state) {
1094 case LCS_IPM_STATE_SET_REQUIRED:
1095 /* del from ipm_list so no one else can tamper with
1097 list_del_init(&ipm->list);
1098 spin_unlock_irqrestore(&card->ipm_lock, flags);
1099 rc = lcs_send_setipm(card, ipm);
1100 spin_lock_irqsave(&card->ipm_lock, flags);
1102 pr_info("Adding multicast address failed."
1103 " Table possibly full!\n");
1104 /* store ipm in failed list -> will be added
1105 * to ipm_list again, so a retry will be done
1106 * during the next call of this function */
1107 list_add_tail(&ipm->list, &failed_list);
1109 ipm->ipm_state = LCS_IPM_STATE_ON_CARD;
1110 /* re-insert into ipm_list */
1111 list_add_tail(&ipm->list, &card->ipm_list);
1114 case LCS_IPM_STATE_DEL_REQUIRED:
1115 list_del(&ipm->list);
1116 spin_unlock_irqrestore(&card->ipm_lock, flags);
1117 lcs_send_delipm(card, ipm);
1118 spin_lock_irqsave(&card->ipm_lock, flags);
1121 case LCS_IPM_STATE_ON_CARD:
1125 /* re-insert all entries from the failed_list into ipm_list */
1126 list_for_each_entry_safe(ipm, tmp, &failed_list, list)
1127 list_move_tail(&ipm->list, &card->ipm_list);
1129 spin_unlock_irqrestore(&card->ipm_lock, flags);
1133 * get mac address for the relevant Multicast address
1136 lcs_get_mac_for_ipm(__be32 ipm, char *mac, struct net_device *dev)
1138 LCS_DBF_TEXT(4,trace, "getmac");
1139 ip_eth_mc_map(ipm, mac);
1143 * function called by net device to handle multicast address relevant things
1145 static void lcs_remove_mc_addresses(struct lcs_card *card,
1146 struct in_device *in4_dev)
1148 struct ip_mc_list *im4;
1149 struct list_head *l;
1150 struct lcs_ipm_list *ipm;
1151 unsigned long flags;
1152 char buf[MAX_ADDR_LEN];
1154 LCS_DBF_TEXT(4, trace, "remmclst");
1155 spin_lock_irqsave(&card->ipm_lock, flags);
1156 list_for_each(l, &card->ipm_list) {
1157 ipm = list_entry(l, struct lcs_ipm_list, list);
1158 for (im4 = rcu_dereference(in4_dev->mc_list);
1159 im4 != NULL; im4 = rcu_dereference(im4->next_rcu)) {
1160 lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev);
1161 if ( (ipm->ipm.ip_addr == im4->multiaddr) &&
1162 (memcmp(buf, &ipm->ipm.mac_addr,
1163 LCS_MAC_LENGTH) == 0) )
1167 ipm->ipm_state = LCS_IPM_STATE_DEL_REQUIRED;
1169 spin_unlock_irqrestore(&card->ipm_lock, flags);
1172 static struct lcs_ipm_list *lcs_check_addr_entry(struct lcs_card *card,
1173 struct ip_mc_list *im4,
1176 struct lcs_ipm_list *tmp, *ipm = NULL;
1177 struct list_head *l;
1178 unsigned long flags;
1180 LCS_DBF_TEXT(4, trace, "chkmcent");
1181 spin_lock_irqsave(&card->ipm_lock, flags);
1182 list_for_each(l, &card->ipm_list) {
1183 tmp = list_entry(l, struct lcs_ipm_list, list);
1184 if ( (tmp->ipm.ip_addr == im4->multiaddr) &&
1185 (memcmp(buf, &tmp->ipm.mac_addr,
1186 LCS_MAC_LENGTH) == 0) ) {
1191 spin_unlock_irqrestore(&card->ipm_lock, flags);
1195 static void lcs_set_mc_addresses(struct lcs_card *card,
1196 struct in_device *in4_dev)
1199 struct ip_mc_list *im4;
1200 struct lcs_ipm_list *ipm;
1201 char buf[MAX_ADDR_LEN];
1202 unsigned long flags;
1204 LCS_DBF_TEXT(4, trace, "setmclst");
1205 for (im4 = rcu_dereference(in4_dev->mc_list); im4 != NULL;
1206 im4 = rcu_dereference(im4->next_rcu)) {
1207 lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev);
1208 ipm = lcs_check_addr_entry(card, im4, buf);
1210 continue; /* Address already in list. */
1211 ipm = kzalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC);
1213 pr_info("Not enough memory to add"
1214 " new multicast entry!\n");
1217 memcpy(&ipm->ipm.mac_addr, buf, LCS_MAC_LENGTH);
1218 ipm->ipm.ip_addr = im4->multiaddr;
1219 ipm->ipm_state = LCS_IPM_STATE_SET_REQUIRED;
1220 spin_lock_irqsave(&card->ipm_lock, flags);
1221 LCS_DBF_HEX(2,trace,&ipm->ipm.ip_addr,4);
1222 list_add(&ipm->list, &card->ipm_list);
1223 spin_unlock_irqrestore(&card->ipm_lock, flags);
1228 lcs_register_mc_addresses(void *data)
1230 struct lcs_card *card;
1231 struct in_device *in4_dev;
1233 card = (struct lcs_card *) data;
1235 if (!lcs_do_run_thread(card, LCS_SET_MC_THREAD))
1237 LCS_DBF_TEXT(4, trace, "regmulti");
1239 in4_dev = in_dev_get(card->dev);
1240 if (in4_dev == NULL)
1243 lcs_remove_mc_addresses(card,in4_dev);
1244 lcs_set_mc_addresses(card, in4_dev);
1246 in_dev_put(in4_dev);
1248 netif_carrier_off(card->dev);
1249 netif_tx_disable(card->dev);
1250 wait_event(card->write.wait_q,
1251 (card->write.state != LCS_CH_STATE_RUNNING));
1252 lcs_fix_multicast_list(card);
1253 if (card->state == DEV_STATE_UP) {
1254 netif_carrier_on(card->dev);
1255 netif_wake_queue(card->dev);
1258 lcs_clear_thread_running_bit(card, LCS_SET_MC_THREAD);
1261 #endif /* CONFIG_IP_MULTICAST */
1264 * function called by net device to
1265 * handle multicast address relevant things
1268 lcs_set_multicast_list(struct net_device *dev)
1270 #ifdef CONFIG_IP_MULTICAST
1271 struct lcs_card *card;
1273 LCS_DBF_TEXT(4, trace, "setmulti");
1274 card = (struct lcs_card *) dev->ml_priv;
1276 if (!lcs_set_thread_start_bit(card, LCS_SET_MC_THREAD))
1277 schedule_work(&card->kernel_thread_starter);
1278 #endif /* CONFIG_IP_MULTICAST */
1282 lcs_check_irb_error(struct ccw_device *cdev, struct irb *irb)
1287 switch (PTR_ERR(irb)) {
1289 dev_warn(&cdev->dev,
1290 "An I/O-error occurred on the LCS device\n");
1291 LCS_DBF_TEXT(2, trace, "ckirberr");
1292 LCS_DBF_TEXT_(2, trace, " rc%d", -EIO);
1295 dev_warn(&cdev->dev,
1296 "A command timed out on the LCS device\n");
1297 LCS_DBF_TEXT(2, trace, "ckirberr");
1298 LCS_DBF_TEXT_(2, trace, " rc%d", -ETIMEDOUT);
1301 dev_warn(&cdev->dev,
1302 "An error occurred on the LCS device, rc=%ld\n",
1304 LCS_DBF_TEXT(2, trace, "ckirberr");
1305 LCS_DBF_TEXT(2, trace, " rc???");
1307 return PTR_ERR(irb);
1311 lcs_get_problem(struct ccw_device *cdev, struct irb *irb)
1316 sense = (char *) irb->ecw;
1317 cstat = irb->scsw.cmd.cstat;
1318 dstat = irb->scsw.cmd.dstat;
1320 if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1321 SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1322 SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1323 LCS_DBF_TEXT(2, trace, "CGENCHK");
1326 if (dstat & DEV_STAT_UNIT_CHECK) {
1327 if (sense[LCS_SENSE_BYTE_1] &
1328 LCS_SENSE_RESETTING_EVENT) {
1329 LCS_DBF_TEXT(2, trace, "REVIND");
1332 if (sense[LCS_SENSE_BYTE_0] &
1333 LCS_SENSE_CMD_REJECT) {
1334 LCS_DBF_TEXT(2, trace, "CMDREJ");
1337 if ((!sense[LCS_SENSE_BYTE_0]) &&
1338 (!sense[LCS_SENSE_BYTE_1]) &&
1339 (!sense[LCS_SENSE_BYTE_2]) &&
1340 (!sense[LCS_SENSE_BYTE_3])) {
1341 LCS_DBF_TEXT(2, trace, "ZEROSEN");
1344 LCS_DBF_TEXT(2, trace, "DGENCHK");
1351 lcs_schedule_recovery(struct lcs_card *card)
1353 LCS_DBF_TEXT(2, trace, "startrec");
1354 if (!lcs_set_thread_start_bit(card, LCS_RECOVERY_THREAD))
1355 schedule_work(&card->kernel_thread_starter);
1359 * IRQ Handler for LCS channels
1362 lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
1364 struct lcs_card *card;
1365 struct lcs_channel *channel;
1369 if (lcs_check_irb_error(cdev, irb))
1372 card = CARD_FROM_DEV(cdev);
1373 if (card->read.ccwdev == cdev)
1374 channel = &card->read;
1376 channel = &card->write;
1378 cstat = irb->scsw.cmd.cstat;
1379 dstat = irb->scsw.cmd.dstat;
1380 LCS_DBF_TEXT_(5, trace, "Rint%s", dev_name(&cdev->dev));
1381 LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.cstat,
1382 irb->scsw.cmd.dstat);
1383 LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.fctl,
1384 irb->scsw.cmd.actl);
1386 /* Check for channel and device errors presented */
1387 rc = lcs_get_problem(cdev, irb);
1388 if (rc || (dstat & DEV_STAT_UNIT_EXCEP)) {
1389 dev_warn(&cdev->dev,
1390 "The LCS device stopped because of an error,"
1391 " dstat=0x%X, cstat=0x%X \n",
1394 channel->state = LCS_CH_STATE_ERROR;
1397 if (channel->state == LCS_CH_STATE_ERROR) {
1398 lcs_schedule_recovery(card);
1399 wake_up(&card->wait_q);
1402 /* How far in the ccw chain have we processed? */
1403 if ((channel->state != LCS_CH_STATE_INIT) &&
1404 (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) &&
1405 (irb->scsw.cmd.cpa != 0)) {
1406 index = (struct ccw1 *) __va((addr_t) irb->scsw.cmd.cpa)
1408 if ((irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) ||
1409 (irb->scsw.cmd.cstat & SCHN_STAT_PCI))
1410 /* Bloody io subsystem tells us lies about cpa... */
1411 index = (index - 1) & (LCS_NUM_BUFFS - 1);
1412 while (channel->io_idx != index) {
1413 __lcs_processed_buffer(channel,
1414 channel->iob + channel->io_idx);
1416 (channel->io_idx + 1) & (LCS_NUM_BUFFS - 1);
1420 if ((irb->scsw.cmd.dstat & DEV_STAT_DEV_END) ||
1421 (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) ||
1422 (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK))
1423 /* Mark channel as stopped. */
1424 channel->state = LCS_CH_STATE_STOPPED;
1425 else if (irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED)
1426 /* CCW execution stopped on a suspend bit. */
1427 channel->state = LCS_CH_STATE_SUSPENDED;
1428 if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1429 if (irb->scsw.cmd.cc != 0) {
1430 ccw_device_halt(channel->ccwdev, 0);
1433 /* The channel has been stopped by halt_IO. */
1434 channel->state = LCS_CH_STATE_HALTED;
1436 if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC)
1437 channel->state = LCS_CH_STATE_CLEARED;
1438 /* Do the rest in the tasklet. */
1439 tasklet_schedule(&channel->irq_tasklet);
1443 * Tasklet for IRQ handler
1446 lcs_tasklet(unsigned long data)
1448 unsigned long flags;
1449 struct lcs_channel *channel;
1450 struct lcs_buffer *iob;
1453 channel = (struct lcs_channel *) data;
1454 LCS_DBF_TEXT_(5, trace, "tlet%s", dev_name(&channel->ccwdev->dev));
1456 /* Check for processed buffers. */
1458 buf_idx = channel->buf_idx;
1459 while (iob[buf_idx].state == LCS_BUF_STATE_PROCESSED) {
1460 /* Do the callback thing. */
1461 if (iob[buf_idx].callback != NULL)
1462 iob[buf_idx].callback(channel, iob + buf_idx);
1463 buf_idx = (buf_idx + 1) & (LCS_NUM_BUFFS - 1);
1465 channel->buf_idx = buf_idx;
1467 if (channel->state == LCS_CH_STATE_STOPPED)
1468 lcs_start_channel(channel);
1469 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1470 if (channel->state == LCS_CH_STATE_SUSPENDED &&
1471 channel->iob[channel->io_idx].state == LCS_BUF_STATE_READY)
1472 __lcs_resume_channel(channel);
1473 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1475 /* Something happened on the channel. Wake up waiters. */
1476 wake_up(&channel->wait_q);
1480 * Finish current tx buffer and make it ready for transmit.
1483 __lcs_emit_txbuffer(struct lcs_card *card)
1485 LCS_DBF_TEXT(5, trace, "emittx");
1486 *(__u16 *)(card->tx_buffer->data + card->tx_buffer->count) = 0;
1487 card->tx_buffer->count += 2;
1488 lcs_ready_buffer(&card->write, card->tx_buffer);
1489 card->tx_buffer = NULL;
1494 * Callback for finished tx buffers.
1497 lcs_txbuffer_cb(struct lcs_channel *channel, struct lcs_buffer *buffer)
1499 struct lcs_card *card;
1501 LCS_DBF_TEXT(5, trace, "txbuffcb");
1502 /* Put buffer back to pool. */
1503 lcs_release_buffer(channel, buffer);
1504 card = container_of(channel, struct lcs_card, write);
1505 if (netif_queue_stopped(card->dev) && netif_carrier_ok(card->dev))
1506 netif_wake_queue(card->dev);
1507 spin_lock(&card->lock);
1509 if (card->tx_emitted <= 0 && card->tx_buffer != NULL)
1511 * Last running tx buffer has finished. Submit partially
1512 * filled current buffer.
1514 __lcs_emit_txbuffer(card);
1515 spin_unlock(&card->lock);
1519 * Packet transmit function called by network stack
1521 static netdev_tx_t __lcs_start_xmit(struct lcs_card *card, struct sk_buff *skb,
1522 struct net_device *dev)
1524 struct lcs_header *header;
1525 int rc = NETDEV_TX_OK;
1527 LCS_DBF_TEXT(5, trace, "hardxmit");
1529 card->stats.tx_dropped++;
1530 card->stats.tx_errors++;
1531 return NETDEV_TX_OK;
1533 if (card->state != DEV_STATE_UP) {
1535 card->stats.tx_dropped++;
1536 card->stats.tx_errors++;
1537 card->stats.tx_carrier_errors++;
1538 return NETDEV_TX_OK;
1540 if (skb->protocol == htons(ETH_P_IPV6)) {
1542 return NETDEV_TX_OK;
1544 netif_stop_queue(card->dev);
1545 spin_lock(&card->lock);
1546 if (card->tx_buffer != NULL &&
1547 card->tx_buffer->count + sizeof(struct lcs_header) +
1548 skb->len + sizeof(u16) > LCS_IOBUFFERSIZE)
1549 /* skb too big for current tx buffer. */
1550 __lcs_emit_txbuffer(card);
1551 if (card->tx_buffer == NULL) {
1552 /* Get new tx buffer */
1553 card->tx_buffer = lcs_get_buffer(&card->write);
1554 if (card->tx_buffer == NULL) {
1555 card->stats.tx_dropped++;
1556 rc = NETDEV_TX_BUSY;
1559 card->tx_buffer->callback = lcs_txbuffer_cb;
1560 card->tx_buffer->count = 0;
1562 header = (struct lcs_header *)
1563 (card->tx_buffer->data + card->tx_buffer->count);
1564 card->tx_buffer->count += skb->len + sizeof(struct lcs_header);
1565 header->offset = card->tx_buffer->count;
1566 header->type = card->lan_type;
1567 header->slot = card->portno;
1568 skb_copy_from_linear_data(skb, header + 1, skb->len);
1569 spin_unlock(&card->lock);
1570 card->stats.tx_bytes += skb->len;
1571 card->stats.tx_packets++;
1573 netif_wake_queue(card->dev);
1574 spin_lock(&card->lock);
1575 if (card->tx_emitted <= 0 && card->tx_buffer != NULL)
1576 /* If this is the first tx buffer emit it immediately. */
1577 __lcs_emit_txbuffer(card);
1579 spin_unlock(&card->lock);
1583 static netdev_tx_t lcs_start_xmit(struct sk_buff *skb, struct net_device *dev)
1585 struct lcs_card *card;
1588 LCS_DBF_TEXT(5, trace, "pktxmit");
1589 card = (struct lcs_card *) dev->ml_priv;
1590 rc = __lcs_start_xmit(card, skb, dev);
1595 * send startlan and lanstat command to make LCS device ready
1598 lcs_startlan_auto(struct lcs_card *card)
1602 LCS_DBF_TEXT(2, trace, "strtauto");
1603 #ifdef CONFIG_ETHERNET
1604 card->lan_type = LCS_FRAME_TYPE_ENET;
1605 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1611 card->lan_type = LCS_FRAME_TYPE_FDDI;
1612 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1620 lcs_startlan(struct lcs_card *card)
1624 LCS_DBF_TEXT(2, trace, "startlan");
1626 if (card->portno != LCS_INVALID_PORT_NO) {
1627 if (card->lan_type == LCS_FRAME_TYPE_AUTO)
1628 rc = lcs_startlan_auto(card);
1630 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1632 for (i = 0; i <= 16; i++) {
1634 if (card->lan_type != LCS_FRAME_TYPE_AUTO)
1635 rc = lcs_send_startlan(card,
1636 LCS_INITIATOR_TCPIP);
1638 /* autodetecting lan type */
1639 rc = lcs_startlan_auto(card);
1645 return lcs_send_lanstat(card);
1650 * LCS detect function
1651 * setup channels and make them I/O ready
1654 lcs_detect(struct lcs_card *card)
1658 LCS_DBF_TEXT(2, setup, "lcsdetct");
1659 /* start/reset card */
1661 netif_stop_queue(card->dev);
1662 rc = lcs_stop_channels(card);
1664 rc = lcs_start_channels(card);
1666 rc = lcs_send_startup(card, LCS_INITIATOR_TCPIP);
1668 rc = lcs_startlan(card);
1672 card->state = DEV_STATE_UP;
1674 card->state = DEV_STATE_DOWN;
1675 card->write.state = LCS_CH_STATE_INIT;
1676 card->read.state = LCS_CH_STATE_INIT;
1685 lcs_stopcard(struct lcs_card *card)
1689 LCS_DBF_TEXT(3, setup, "stopcard");
1691 if (card->read.state != LCS_CH_STATE_STOPPED &&
1692 card->write.state != LCS_CH_STATE_STOPPED &&
1693 card->read.state != LCS_CH_STATE_ERROR &&
1694 card->write.state != LCS_CH_STATE_ERROR &&
1695 card->state == DEV_STATE_UP) {
1696 lcs_clear_multicast_list(card);
1697 rc = lcs_send_stoplan(card,LCS_INITIATOR_TCPIP);
1698 rc = lcs_send_shutdown(card);
1700 rc = lcs_stop_channels(card);
1701 card->state = DEV_STATE_DOWN;
1707 * Kernel Thread helper functions for LGW initiated commands
1710 lcs_start_kernel_thread(struct work_struct *work)
1712 struct lcs_card *card = container_of(work, struct lcs_card, kernel_thread_starter);
1713 LCS_DBF_TEXT(5, trace, "krnthrd");
1714 if (lcs_do_start_thread(card, LCS_RECOVERY_THREAD))
1715 kthread_run(lcs_recovery, card, "lcs_recover");
1716 #ifdef CONFIG_IP_MULTICAST
1717 if (lcs_do_start_thread(card, LCS_SET_MC_THREAD))
1718 kthread_run(lcs_register_mc_addresses, card, "regipm");
1723 * Process control frames.
1726 lcs_get_control(struct lcs_card *card, struct lcs_cmd *cmd)
1728 LCS_DBF_TEXT(5, trace, "getctrl");
1729 if (cmd->initiator == LCS_INITIATOR_LGW) {
1730 switch(cmd->cmd_code) {
1731 case LCS_CMD_STARTUP:
1732 case LCS_CMD_STARTLAN:
1733 lcs_schedule_recovery(card);
1735 case LCS_CMD_STOPLAN:
1737 pr_warn("Stoplan for %s initiated by LGW\n",
1739 netif_carrier_off(card->dev);
1743 LCS_DBF_TEXT(5, trace, "noLGWcmd");
1747 lcs_notify_lancmd_waiters(card, cmd);
1751 * Unpack network packet.
1754 lcs_get_skb(struct lcs_card *card, char *skb_data, unsigned int skb_len)
1756 struct sk_buff *skb;
1758 LCS_DBF_TEXT(5, trace, "getskb");
1759 if (card->dev == NULL ||
1760 card->state != DEV_STATE_UP)
1761 /* The card isn't up. Ignore the packet. */
1764 skb = dev_alloc_skb(skb_len);
1766 dev_err(&card->dev->dev,
1767 " Allocating a socket buffer to interface %s failed\n",
1769 card->stats.rx_dropped++;
1772 skb_put_data(skb, skb_data, skb_len);
1773 skb->protocol = card->lan_type_trans(skb, card->dev);
1774 card->stats.rx_bytes += skb_len;
1775 card->stats.rx_packets++;
1776 if (skb->protocol == htons(ETH_P_802_2))
1777 *((__u32 *)skb->cb) = ++card->pkt_seq;
1782 * LCS main routine to get packets and lancmd replies from the buffers
1785 lcs_get_frames_cb(struct lcs_channel *channel, struct lcs_buffer *buffer)
1787 struct lcs_card *card;
1788 struct lcs_header *lcs_hdr;
1791 LCS_DBF_TEXT(5, trace, "lcsgtpkt");
1792 lcs_hdr = (struct lcs_header *) buffer->data;
1793 if (lcs_hdr->offset == LCS_ILLEGAL_OFFSET) {
1794 LCS_DBF_TEXT(4, trace, "-eiogpkt");
1797 card = container_of(channel, struct lcs_card, read);
1799 while (lcs_hdr->offset != 0) {
1800 if (lcs_hdr->offset <= 0 ||
1801 lcs_hdr->offset > LCS_IOBUFFERSIZE ||
1802 lcs_hdr->offset < offset) {
1803 /* Offset invalid. */
1804 card->stats.rx_length_errors++;
1805 card->stats.rx_errors++;
1808 /* What kind of frame is it? */
1809 if (lcs_hdr->type == LCS_FRAME_TYPE_CONTROL)
1810 /* Control frame. */
1811 lcs_get_control(card, (struct lcs_cmd *) lcs_hdr);
1812 else if (lcs_hdr->type == LCS_FRAME_TYPE_ENET ||
1813 lcs_hdr->type == LCS_FRAME_TYPE_TR ||
1814 lcs_hdr->type == LCS_FRAME_TYPE_FDDI)
1815 /* Normal network packet. */
1816 lcs_get_skb(card, (char *)(lcs_hdr + 1),
1817 lcs_hdr->offset - offset -
1818 sizeof(struct lcs_header));
1820 /* Unknown frame type. */
1821 ; // FIXME: error message ?
1822 /* Proceed to next frame. */
1823 offset = lcs_hdr->offset;
1824 lcs_hdr->offset = LCS_ILLEGAL_OFFSET;
1825 lcs_hdr = (struct lcs_header *) (buffer->data + offset);
1827 /* The buffer is now empty. Make it ready again. */
1828 lcs_ready_buffer(&card->read, buffer);
1832 * get network statistics for ifconfig and other user programs
1834 static struct net_device_stats *
1835 lcs_getstats(struct net_device *dev)
1837 struct lcs_card *card;
1839 LCS_DBF_TEXT(4, trace, "netstats");
1840 card = (struct lcs_card *) dev->ml_priv;
1841 return &card->stats;
1846 * This function will be called by user doing ifconfig xxx down
1849 lcs_stop_device(struct net_device *dev)
1851 struct lcs_card *card;
1854 LCS_DBF_TEXT(2, trace, "stopdev");
1855 card = (struct lcs_card *) dev->ml_priv;
1856 netif_carrier_off(dev);
1857 netif_tx_disable(dev);
1858 dev->flags &= ~IFF_UP;
1859 wait_event(card->write.wait_q,
1860 (card->write.state != LCS_CH_STATE_RUNNING));
1861 rc = lcs_stopcard(card);
1863 dev_err(&card->dev->dev,
1864 " Shutting down the LCS device failed\n");
1869 * start lcs device and make it runnable
1870 * This function will be called by user doing ifconfig xxx up
1873 lcs_open_device(struct net_device *dev)
1875 struct lcs_card *card;
1878 LCS_DBF_TEXT(2, trace, "opendev");
1879 card = (struct lcs_card *) dev->ml_priv;
1880 /* initialize statistics */
1881 rc = lcs_detect(card);
1883 pr_err("Error in opening device!\n");
1886 dev->flags |= IFF_UP;
1887 netif_carrier_on(dev);
1888 netif_wake_queue(dev);
1889 card->state = DEV_STATE_UP;
1895 * show function for portno called by cat or similar things
1898 lcs_portno_show (struct device *dev, struct device_attribute *attr, char *buf)
1900 struct lcs_card *card;
1902 card = dev_get_drvdata(dev);
1907 return sprintf(buf, "%d\n", card->portno);
1911 * store the value which is piped to file portno
1914 lcs_portno_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1916 struct lcs_card *card;
1920 card = dev_get_drvdata(dev);
1925 rc = kstrtos16(buf, 0, &value);
1928 /* TODO: sanity checks */
1929 card->portno = value;
1931 card->dev->dev_port = card->portno;
1937 static DEVICE_ATTR(portno, 0644, lcs_portno_show, lcs_portno_store);
1939 static const char *lcs_type[] = {
1944 "unknown channel type",
1945 "unsupported channel type",
1949 lcs_type_show(struct device *dev, struct device_attribute *attr, char *buf)
1951 struct ccwgroup_device *cgdev;
1953 cgdev = to_ccwgroupdev(dev);
1957 return sprintf(buf, "%s\n", lcs_type[cgdev->cdev[0]->id.driver_info]);
1960 static DEVICE_ATTR(type, 0444, lcs_type_show, NULL);
1963 lcs_timeout_show(struct device *dev, struct device_attribute *attr, char *buf)
1965 struct lcs_card *card;
1967 card = dev_get_drvdata(dev);
1969 return card ? sprintf(buf, "%u\n", card->lancmd_timeout) : 0;
1973 lcs_timeout_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1975 struct lcs_card *card;
1979 card = dev_get_drvdata(dev);
1984 rc = kstrtouint(buf, 0, &value);
1987 /* TODO: sanity checks */
1988 card->lancmd_timeout = value;
1994 static DEVICE_ATTR(lancmd_timeout, 0644, lcs_timeout_show, lcs_timeout_store);
1997 lcs_dev_recover_store(struct device *dev, struct device_attribute *attr,
1998 const char *buf, size_t count)
2000 struct lcs_card *card = dev_get_drvdata(dev);
2006 if (card->state != DEV_STATE_UP)
2008 i = simple_strtoul(buf, &tmp, 16);
2010 lcs_schedule_recovery(card);
2014 static DEVICE_ATTR(recover, 0200, NULL, lcs_dev_recover_store);
2016 static struct attribute * lcs_attrs[] = {
2017 &dev_attr_portno.attr,
2018 &dev_attr_type.attr,
2019 &dev_attr_lancmd_timeout.attr,
2020 &dev_attr_recover.attr,
2023 static struct attribute_group lcs_attr_group = {
2026 static const struct attribute_group *lcs_attr_groups[] = {
2030 static const struct device_type lcs_devtype = {
2032 .groups = lcs_attr_groups,
2036 * lcs_probe_device is called on establishing a new ccwgroup_device.
2039 lcs_probe_device(struct ccwgroup_device *ccwgdev)
2041 struct lcs_card *card;
2043 if (!get_device(&ccwgdev->dev))
2046 LCS_DBF_TEXT(2, setup, "add_dev");
2047 card = lcs_alloc_card();
2049 LCS_DBF_TEXT_(2, setup, " rc%d", -ENOMEM);
2050 put_device(&ccwgdev->dev);
2053 dev_set_drvdata(&ccwgdev->dev, card);
2054 ccwgdev->cdev[0]->handler = lcs_irq;
2055 ccwgdev->cdev[1]->handler = lcs_irq;
2056 card->gdev = ccwgdev;
2057 INIT_WORK(&card->kernel_thread_starter, lcs_start_kernel_thread);
2058 card->thread_start_mask = 0;
2059 card->thread_allowed_mask = 0;
2060 card->thread_running_mask = 0;
2061 ccwgdev->dev.type = &lcs_devtype;
2067 lcs_register_netdev(struct ccwgroup_device *ccwgdev)
2069 struct lcs_card *card;
2071 LCS_DBF_TEXT(2, setup, "regnetdv");
2072 card = dev_get_drvdata(&ccwgdev->dev);
2073 if (card->dev->reg_state != NETREG_UNINITIALIZED)
2075 SET_NETDEV_DEV(card->dev, &ccwgdev->dev);
2076 return register_netdev(card->dev);
2080 * lcs_new_device will be called by setting the group device online.
2082 static const struct net_device_ops lcs_netdev_ops = {
2083 .ndo_open = lcs_open_device,
2084 .ndo_stop = lcs_stop_device,
2085 .ndo_get_stats = lcs_getstats,
2086 .ndo_start_xmit = lcs_start_xmit,
2089 static const struct net_device_ops lcs_mc_netdev_ops = {
2090 .ndo_open = lcs_open_device,
2091 .ndo_stop = lcs_stop_device,
2092 .ndo_get_stats = lcs_getstats,
2093 .ndo_start_xmit = lcs_start_xmit,
2094 .ndo_set_rx_mode = lcs_set_multicast_list,
2098 lcs_new_device(struct ccwgroup_device *ccwgdev)
2100 struct lcs_card *card;
2101 struct net_device *dev=NULL;
2102 enum lcs_dev_states recover_state;
2105 card = dev_get_drvdata(&ccwgdev->dev);
2109 LCS_DBF_TEXT(2, setup, "newdev");
2110 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
2111 card->read.ccwdev = ccwgdev->cdev[0];
2112 card->write.ccwdev = ccwgdev->cdev[1];
2114 recover_state = card->state;
2115 rc = ccw_device_set_online(card->read.ccwdev);
2118 rc = ccw_device_set_online(card->write.ccwdev);
2122 LCS_DBF_TEXT(3, setup, "lcsnewdv");
2124 lcs_setup_card(card);
2125 rc = lcs_detect(card);
2127 LCS_DBF_TEXT(2, setup, "dtctfail");
2128 dev_err(&ccwgdev->dev,
2129 "Detecting a network adapter for LCS devices"
2130 " failed with rc=%d (0x%x)\n", rc, rc);
2135 LCS_DBF_TEXT(2, setup, "samedev");
2136 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
2139 switch (card->lan_type) {
2140 #ifdef CONFIG_ETHERNET
2141 case LCS_FRAME_TYPE_ENET:
2142 card->lan_type_trans = eth_type_trans;
2143 dev = alloc_etherdev(0);
2147 case LCS_FRAME_TYPE_FDDI:
2148 card->lan_type_trans = fddi_type_trans;
2149 dev = alloc_fddidev(0);
2153 LCS_DBF_TEXT(3, setup, "errinit");
2154 pr_err(" Initialization failed\n");
2160 card->dev->ml_priv = card;
2161 card->dev->netdev_ops = &lcs_netdev_ops;
2162 card->dev->dev_port = card->portno;
2163 memcpy(card->dev->dev_addr, card->mac, LCS_MAC_LENGTH);
2164 #ifdef CONFIG_IP_MULTICAST
2165 if (!lcs_check_multicast_support(card))
2166 card->dev->netdev_ops = &lcs_mc_netdev_ops;
2169 lcs_set_allowed_threads(card,0xffffffff);
2170 if (recover_state == DEV_STATE_RECOVER) {
2171 lcs_set_multicast_list(card->dev);
2172 card->dev->flags |= IFF_UP;
2173 netif_carrier_on(card->dev);
2174 netif_wake_queue(card->dev);
2175 card->state = DEV_STATE_UP;
2180 if (lcs_register_netdev(ccwgdev) != 0)
2183 /* Print out supported assists: IPv6 */
2184 pr_info("LCS device %s %s IPv6 support\n", card->dev->name,
2185 (card->ip_assists_supported & LCS_IPASS_IPV6_SUPPORT) ?
2186 "with" : "without");
2187 /* Print out supported assist: Multicast */
2188 pr_info("LCS device %s %s Multicast support\n", card->dev->name,
2189 (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) ?
2190 "with" : "without");
2194 ccw_device_set_offline(card->write.ccwdev);
2196 ccw_device_set_offline(card->read.ccwdev);
2202 * lcs_shutdown_device, called when setting the group device offline.
2205 __lcs_shutdown_device(struct ccwgroup_device *ccwgdev, int recovery_mode)
2207 struct lcs_card *card;
2208 enum lcs_dev_states recover_state;
2209 int ret = 0, ret2 = 0, ret3 = 0;
2211 LCS_DBF_TEXT(3, setup, "shtdndev");
2212 card = dev_get_drvdata(&ccwgdev->dev);
2215 if (recovery_mode == 0) {
2216 lcs_set_allowed_threads(card, 0);
2217 if (lcs_wait_for_threads(card, LCS_SET_MC_THREAD))
2218 return -ERESTARTSYS;
2220 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
2221 recover_state = card->state;
2223 ret = lcs_stop_device(card->dev);
2224 ret2 = ccw_device_set_offline(card->read.ccwdev);
2225 ret3 = ccw_device_set_offline(card->write.ccwdev);
2227 ret = (ret2) ? ret2 : ret3;
2229 LCS_DBF_TEXT_(3, setup, "1err:%d", ret);
2230 if (recover_state == DEV_STATE_UP) {
2231 card->state = DEV_STATE_RECOVER;
2237 lcs_shutdown_device(struct ccwgroup_device *ccwgdev)
2239 return __lcs_shutdown_device(ccwgdev, 0);
2243 * drive lcs recovery after startup and startlan initiated by Lan Gateway
2246 lcs_recovery(void *ptr)
2248 struct lcs_card *card;
2249 struct ccwgroup_device *gdev;
2252 card = (struct lcs_card *) ptr;
2254 LCS_DBF_TEXT(4, trace, "recover1");
2255 if (!lcs_do_run_thread(card, LCS_RECOVERY_THREAD))
2257 LCS_DBF_TEXT(4, trace, "recover2");
2259 dev_warn(&gdev->dev,
2260 "A recovery process has been started for the LCS device\n");
2261 rc = __lcs_shutdown_device(gdev, 1);
2262 rc = lcs_new_device(gdev);
2264 pr_info("Device %s successfully recovered!\n",
2267 pr_info("Device %s could not be recovered!\n",
2269 lcs_clear_thread_running_bit(card, LCS_RECOVERY_THREAD);
2274 * lcs_remove_device, free buffers and card
2277 lcs_remove_device(struct ccwgroup_device *ccwgdev)
2279 struct lcs_card *card;
2281 card = dev_get_drvdata(&ccwgdev->dev);
2285 LCS_DBF_TEXT(3, setup, "remdev");
2286 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
2287 if (ccwgdev->state == CCWGROUP_ONLINE) {
2288 lcs_shutdown_device(ccwgdev);
2291 unregister_netdev(card->dev);
2292 lcs_cleanup_card(card);
2293 lcs_free_card(card);
2294 dev_set_drvdata(&ccwgdev->dev, NULL);
2295 put_device(&ccwgdev->dev);
2298 static struct ccw_device_id lcs_ids[] = {
2299 {CCW_DEVICE(0x3088, 0x08), .driver_info = lcs_channel_type_parallel},
2300 {CCW_DEVICE(0x3088, 0x1f), .driver_info = lcs_channel_type_2216},
2301 {CCW_DEVICE(0x3088, 0x60), .driver_info = lcs_channel_type_osa2},
2304 MODULE_DEVICE_TABLE(ccw, lcs_ids);
2306 static struct ccw_driver lcs_ccw_driver = {
2308 .owner = THIS_MODULE,
2312 .probe = ccwgroup_probe_ccwdev,
2313 .remove = ccwgroup_remove_ccwdev,
2314 .int_class = IRQIO_LCS,
2318 * LCS ccwgroup driver registration
2320 static struct ccwgroup_driver lcs_group_driver = {
2322 .owner = THIS_MODULE,
2325 .ccw_driver = &lcs_ccw_driver,
2326 .setup = lcs_probe_device,
2327 .remove = lcs_remove_device,
2328 .set_online = lcs_new_device,
2329 .set_offline = lcs_shutdown_device,
2332 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
2336 err = ccwgroup_create_dev(lcs_root_dev, &lcs_group_driver, 2, buf);
2337 return err ? err : count;
2339 static DRIVER_ATTR_WO(group);
2341 static struct attribute *lcs_drv_attrs[] = {
2342 &driver_attr_group.attr,
2345 static struct attribute_group lcs_drv_attr_group = {
2346 .attrs = lcs_drv_attrs,
2348 static const struct attribute_group *lcs_drv_attr_groups[] = {
2349 &lcs_drv_attr_group,
2354 * LCS Module/Kernel initialization function
2357 __init lcs_init_module(void)
2361 pr_info("Loading %s\n", version);
2362 rc = lcs_register_debug_facility();
2363 LCS_DBF_TEXT(0, setup, "lcsinit");
2366 lcs_root_dev = root_device_register("lcs");
2367 rc = PTR_ERR_OR_ZERO(lcs_root_dev);
2370 rc = ccw_driver_register(&lcs_ccw_driver);
2373 lcs_group_driver.driver.groups = lcs_drv_attr_groups;
2374 rc = ccwgroup_driver_register(&lcs_group_driver);
2380 ccw_driver_unregister(&lcs_ccw_driver);
2382 root_device_unregister(lcs_root_dev);
2384 lcs_unregister_debug_facility();
2386 pr_err("Initializing the lcs device driver failed\n");
2392 * LCS module cleanup function
2395 __exit lcs_cleanup_module(void)
2397 pr_info("Terminating lcs module.\n");
2398 LCS_DBF_TEXT(0, trace, "cleanup");
2399 ccwgroup_driver_unregister(&lcs_group_driver);
2400 ccw_driver_unregister(&lcs_ccw_driver);
2401 root_device_unregister(lcs_root_dev);
2402 lcs_unregister_debug_facility();
2405 module_init(lcs_init_module);
2406 module_exit(lcs_cleanup_module);
2408 MODULE_AUTHOR("Frank Pavlic <fpavlic@de.ibm.com>");
2409 MODULE_LICENSE("GPL");