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, (addr_t) channel);
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, (addr_t) channel);
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 WARN_ON(atomic_read(&reply->refcnt) <= 0);
760 atomic_inc(&reply->refcnt);
764 lcs_put_reply(struct lcs_reply *reply)
766 WARN_ON(atomic_read(&reply->refcnt) <= 0);
767 if (atomic_dec_and_test(&reply->refcnt)) {
773 static struct lcs_reply *
774 lcs_alloc_reply(struct lcs_cmd *cmd)
776 struct lcs_reply *reply;
778 LCS_DBF_TEXT(4, trace, "getreply");
780 reply = kzalloc(sizeof(struct lcs_reply), GFP_ATOMIC);
783 atomic_set(&reply->refcnt,1);
784 reply->sequence_no = cmd->sequence_no;
787 init_waitqueue_head(&reply->wait_q);
793 * Notifier function for lancmd replies. Called from read irq.
796 lcs_notify_lancmd_waiters(struct lcs_card *card, struct lcs_cmd *cmd)
798 struct list_head *l, *n;
799 struct lcs_reply *reply;
801 LCS_DBF_TEXT(4, trace, "notiwait");
802 spin_lock(&card->lock);
803 list_for_each_safe(l, n, &card->lancmd_waiters) {
804 reply = list_entry(l, struct lcs_reply, list);
805 if (reply->sequence_no == cmd->sequence_no) {
806 lcs_get_reply(reply);
807 list_del_init(&reply->list);
808 if (reply->callback != NULL)
809 reply->callback(card, cmd);
811 reply->rc = cmd->return_code;
812 wake_up(&reply->wait_q);
813 lcs_put_reply(reply);
817 spin_unlock(&card->lock);
821 * Emit buffer of a lan command.
824 lcs_lancmd_timeout(struct timer_list *t)
826 struct lcs_reply *reply = from_timer(reply, t, timer);
827 struct lcs_reply *list_reply, *r;
830 LCS_DBF_TEXT(4, trace, "timeout");
831 spin_lock_irqsave(&reply->card->lock, flags);
832 list_for_each_entry_safe(list_reply, r,
833 &reply->card->lancmd_waiters,list) {
834 if (reply == list_reply) {
835 lcs_get_reply(reply);
836 list_del_init(&reply->list);
837 spin_unlock_irqrestore(&reply->card->lock, flags);
840 wake_up(&reply->wait_q);
841 lcs_put_reply(reply);
845 spin_unlock_irqrestore(&reply->card->lock, flags);
849 lcs_send_lancmd(struct lcs_card *card, struct lcs_buffer *buffer,
850 void (*reply_callback)(struct lcs_card *, struct lcs_cmd *))
852 struct lcs_reply *reply;
857 LCS_DBF_TEXT(4, trace, "sendcmd");
858 cmd = (struct lcs_cmd *) buffer->data;
859 cmd->return_code = 0;
860 cmd->sequence_no = card->sequence_no++;
861 reply = lcs_alloc_reply(cmd);
864 reply->callback = reply_callback;
866 spin_lock_irqsave(&card->lock, flags);
867 list_add_tail(&reply->list, &card->lancmd_waiters);
868 spin_unlock_irqrestore(&card->lock, flags);
870 buffer->callback = lcs_release_buffer;
871 rc = lcs_ready_buffer(&card->write, buffer);
874 timer_setup(&reply->timer, lcs_lancmd_timeout, 0);
875 mod_timer(&reply->timer, jiffies + HZ * card->lancmd_timeout);
876 wait_event(reply->wait_q, reply->received);
877 del_timer_sync(&reply->timer);
878 LCS_DBF_TEXT_(4, trace, "rc:%d",reply->rc);
880 lcs_put_reply(reply);
881 return rc ? -EIO : 0;
885 * LCS startup command
888 lcs_send_startup(struct lcs_card *card, __u8 initiator)
890 struct lcs_buffer *buffer;
893 LCS_DBF_TEXT(2, trace, "startup");
894 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
895 cmd = (struct lcs_cmd *) buffer->data;
896 cmd->cmd_code = LCS_CMD_STARTUP;
897 cmd->initiator = initiator;
898 cmd->cmd.lcs_startup.buff_size = LCS_IOBUFFERSIZE;
899 return lcs_send_lancmd(card, buffer, NULL);
903 * LCS shutdown command
906 lcs_send_shutdown(struct lcs_card *card)
908 struct lcs_buffer *buffer;
911 LCS_DBF_TEXT(2, trace, "shutdown");
912 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
913 cmd = (struct lcs_cmd *) buffer->data;
914 cmd->cmd_code = LCS_CMD_SHUTDOWN;
915 cmd->initiator = LCS_INITIATOR_TCPIP;
916 return lcs_send_lancmd(card, buffer, NULL);
920 * LCS lanstat command
923 __lcs_lanstat_cb(struct lcs_card *card, struct lcs_cmd *cmd)
925 LCS_DBF_TEXT(2, trace, "statcb");
926 memcpy(card->mac, cmd->cmd.lcs_lanstat_cmd.mac_addr, LCS_MAC_LENGTH);
930 lcs_send_lanstat(struct lcs_card *card)
932 struct lcs_buffer *buffer;
935 LCS_DBF_TEXT(2,trace, "cmdstat");
936 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
937 cmd = (struct lcs_cmd *) buffer->data;
938 /* Setup lanstat command. */
939 cmd->cmd_code = LCS_CMD_LANSTAT;
940 cmd->initiator = LCS_INITIATOR_TCPIP;
941 cmd->cmd.lcs_std_cmd.lan_type = card->lan_type;
942 cmd->cmd.lcs_std_cmd.portno = card->portno;
943 return lcs_send_lancmd(card, buffer, __lcs_lanstat_cb);
947 * send stoplan command
950 lcs_send_stoplan(struct lcs_card *card, __u8 initiator)
952 struct lcs_buffer *buffer;
955 LCS_DBF_TEXT(2, trace, "cmdstpln");
956 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
957 cmd = (struct lcs_cmd *) buffer->data;
958 cmd->cmd_code = LCS_CMD_STOPLAN;
959 cmd->initiator = initiator;
960 cmd->cmd.lcs_std_cmd.lan_type = card->lan_type;
961 cmd->cmd.lcs_std_cmd.portno = card->portno;
962 return lcs_send_lancmd(card, buffer, NULL);
966 * send startlan command
969 __lcs_send_startlan_cb(struct lcs_card *card, struct lcs_cmd *cmd)
971 LCS_DBF_TEXT(2, trace, "srtlancb");
972 card->lan_type = cmd->cmd.lcs_std_cmd.lan_type;
973 card->portno = cmd->cmd.lcs_std_cmd.portno;
977 lcs_send_startlan(struct lcs_card *card, __u8 initiator)
979 struct lcs_buffer *buffer;
982 LCS_DBF_TEXT(2, trace, "cmdstaln");
983 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
984 cmd = (struct lcs_cmd *) buffer->data;
985 cmd->cmd_code = LCS_CMD_STARTLAN;
986 cmd->initiator = initiator;
987 cmd->cmd.lcs_std_cmd.lan_type = card->lan_type;
988 cmd->cmd.lcs_std_cmd.portno = card->portno;
989 return lcs_send_lancmd(card, buffer, __lcs_send_startlan_cb);
992 #ifdef CONFIG_IP_MULTICAST
994 * send setipm command (Multicast)
997 lcs_send_setipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list)
999 struct lcs_buffer *buffer;
1000 struct lcs_cmd *cmd;
1002 LCS_DBF_TEXT(2, trace, "cmdsetim");
1003 buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE);
1004 cmd = (struct lcs_cmd *) buffer->data;
1005 cmd->cmd_code = LCS_CMD_SETIPM;
1006 cmd->initiator = LCS_INITIATOR_TCPIP;
1007 cmd->cmd.lcs_qipassist.lan_type = card->lan_type;
1008 cmd->cmd.lcs_qipassist.portno = card->portno;
1009 cmd->cmd.lcs_qipassist.version = 4;
1010 cmd->cmd.lcs_qipassist.num_ip_pairs = 1;
1011 memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair,
1012 &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair));
1013 LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr);
1014 return lcs_send_lancmd(card, buffer, NULL);
1018 * send delipm command (Multicast)
1021 lcs_send_delipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list)
1023 struct lcs_buffer *buffer;
1024 struct lcs_cmd *cmd;
1026 LCS_DBF_TEXT(2, trace, "cmddelim");
1027 buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE);
1028 cmd = (struct lcs_cmd *) buffer->data;
1029 cmd->cmd_code = LCS_CMD_DELIPM;
1030 cmd->initiator = LCS_INITIATOR_TCPIP;
1031 cmd->cmd.lcs_qipassist.lan_type = card->lan_type;
1032 cmd->cmd.lcs_qipassist.portno = card->portno;
1033 cmd->cmd.lcs_qipassist.version = 4;
1034 cmd->cmd.lcs_qipassist.num_ip_pairs = 1;
1035 memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair,
1036 &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair));
1037 LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr);
1038 return lcs_send_lancmd(card, buffer, NULL);
1042 * check if multicast is supported by LCS
1045 __lcs_check_multicast_cb(struct lcs_card *card, struct lcs_cmd *cmd)
1047 LCS_DBF_TEXT(2, trace, "chkmccb");
1048 card->ip_assists_supported =
1049 cmd->cmd.lcs_qipassist.ip_assists_supported;
1050 card->ip_assists_enabled =
1051 cmd->cmd.lcs_qipassist.ip_assists_enabled;
1055 lcs_check_multicast_support(struct lcs_card *card)
1057 struct lcs_buffer *buffer;
1058 struct lcs_cmd *cmd;
1061 LCS_DBF_TEXT(2, trace, "cmdqipa");
1062 /* Send query ipassist. */
1063 buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE);
1064 cmd = (struct lcs_cmd *) buffer->data;
1065 cmd->cmd_code = LCS_CMD_QIPASSIST;
1066 cmd->initiator = LCS_INITIATOR_TCPIP;
1067 cmd->cmd.lcs_qipassist.lan_type = card->lan_type;
1068 cmd->cmd.lcs_qipassist.portno = card->portno;
1069 cmd->cmd.lcs_qipassist.version = 4;
1070 cmd->cmd.lcs_qipassist.num_ip_pairs = 1;
1071 rc = lcs_send_lancmd(card, buffer, __lcs_check_multicast_cb);
1073 pr_err("Query IPAssist failed. Assuming unsupported!\n");
1076 if (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT)
1082 * set or del multicast address on LCS card
1085 lcs_fix_multicast_list(struct lcs_card *card)
1087 struct list_head failed_list;
1088 struct lcs_ipm_list *ipm, *tmp;
1089 unsigned long flags;
1092 LCS_DBF_TEXT(4,trace, "fixipm");
1093 INIT_LIST_HEAD(&failed_list);
1094 spin_lock_irqsave(&card->ipm_lock, flags);
1096 list_for_each_entry_safe(ipm, tmp, &card->ipm_list, list){
1097 switch (ipm->ipm_state) {
1098 case LCS_IPM_STATE_SET_REQUIRED:
1099 /* del from ipm_list so no one else can tamper with
1101 list_del_init(&ipm->list);
1102 spin_unlock_irqrestore(&card->ipm_lock, flags);
1103 rc = lcs_send_setipm(card, ipm);
1104 spin_lock_irqsave(&card->ipm_lock, flags);
1106 pr_info("Adding multicast address failed."
1107 " Table possibly full!\n");
1108 /* store ipm in failed list -> will be added
1109 * to ipm_list again, so a retry will be done
1110 * during the next call of this function */
1111 list_add_tail(&ipm->list, &failed_list);
1113 ipm->ipm_state = LCS_IPM_STATE_ON_CARD;
1114 /* re-insert into ipm_list */
1115 list_add_tail(&ipm->list, &card->ipm_list);
1118 case LCS_IPM_STATE_DEL_REQUIRED:
1119 list_del(&ipm->list);
1120 spin_unlock_irqrestore(&card->ipm_lock, flags);
1121 lcs_send_delipm(card, ipm);
1122 spin_lock_irqsave(&card->ipm_lock, flags);
1125 case LCS_IPM_STATE_ON_CARD:
1129 /* re-insert all entries from the failed_list into ipm_list */
1130 list_for_each_entry_safe(ipm, tmp, &failed_list, list)
1131 list_move_tail(&ipm->list, &card->ipm_list);
1133 spin_unlock_irqrestore(&card->ipm_lock, flags);
1137 * get mac address for the relevant Multicast address
1140 lcs_get_mac_for_ipm(__be32 ipm, char *mac, struct net_device *dev)
1142 LCS_DBF_TEXT(4,trace, "getmac");
1143 ip_eth_mc_map(ipm, mac);
1147 * function called by net device to handle multicast address relevant things
1149 static void lcs_remove_mc_addresses(struct lcs_card *card,
1150 struct in_device *in4_dev)
1152 struct ip_mc_list *im4;
1153 struct list_head *l;
1154 struct lcs_ipm_list *ipm;
1155 unsigned long flags;
1156 char buf[MAX_ADDR_LEN];
1158 LCS_DBF_TEXT(4, trace, "remmclst");
1159 spin_lock_irqsave(&card->ipm_lock, flags);
1160 list_for_each(l, &card->ipm_list) {
1161 ipm = list_entry(l, struct lcs_ipm_list, list);
1162 for (im4 = rcu_dereference(in4_dev->mc_list);
1163 im4 != NULL; im4 = rcu_dereference(im4->next_rcu)) {
1164 lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev);
1165 if ( (ipm->ipm.ip_addr == im4->multiaddr) &&
1166 (memcmp(buf, &ipm->ipm.mac_addr,
1167 LCS_MAC_LENGTH) == 0) )
1171 ipm->ipm_state = LCS_IPM_STATE_DEL_REQUIRED;
1173 spin_unlock_irqrestore(&card->ipm_lock, flags);
1176 static struct lcs_ipm_list *lcs_check_addr_entry(struct lcs_card *card,
1177 struct ip_mc_list *im4,
1180 struct lcs_ipm_list *tmp, *ipm = NULL;
1181 struct list_head *l;
1182 unsigned long flags;
1184 LCS_DBF_TEXT(4, trace, "chkmcent");
1185 spin_lock_irqsave(&card->ipm_lock, flags);
1186 list_for_each(l, &card->ipm_list) {
1187 tmp = list_entry(l, struct lcs_ipm_list, list);
1188 if ( (tmp->ipm.ip_addr == im4->multiaddr) &&
1189 (memcmp(buf, &tmp->ipm.mac_addr,
1190 LCS_MAC_LENGTH) == 0) ) {
1195 spin_unlock_irqrestore(&card->ipm_lock, flags);
1199 static void lcs_set_mc_addresses(struct lcs_card *card,
1200 struct in_device *in4_dev)
1203 struct ip_mc_list *im4;
1204 struct lcs_ipm_list *ipm;
1205 char buf[MAX_ADDR_LEN];
1206 unsigned long flags;
1208 LCS_DBF_TEXT(4, trace, "setmclst");
1209 for (im4 = rcu_dereference(in4_dev->mc_list); im4 != NULL;
1210 im4 = rcu_dereference(im4->next_rcu)) {
1211 lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev);
1212 ipm = lcs_check_addr_entry(card, im4, buf);
1214 continue; /* Address already in list. */
1215 ipm = kzalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC);
1217 pr_info("Not enough memory to add"
1218 " new multicast entry!\n");
1221 memcpy(&ipm->ipm.mac_addr, buf, LCS_MAC_LENGTH);
1222 ipm->ipm.ip_addr = im4->multiaddr;
1223 ipm->ipm_state = LCS_IPM_STATE_SET_REQUIRED;
1224 spin_lock_irqsave(&card->ipm_lock, flags);
1225 LCS_DBF_HEX(2,trace,&ipm->ipm.ip_addr,4);
1226 list_add(&ipm->list, &card->ipm_list);
1227 spin_unlock_irqrestore(&card->ipm_lock, flags);
1232 lcs_register_mc_addresses(void *data)
1234 struct lcs_card *card;
1235 struct in_device *in4_dev;
1237 card = (struct lcs_card *) data;
1239 if (!lcs_do_run_thread(card, LCS_SET_MC_THREAD))
1241 LCS_DBF_TEXT(4, trace, "regmulti");
1243 in4_dev = in_dev_get(card->dev);
1244 if (in4_dev == NULL)
1247 lcs_remove_mc_addresses(card,in4_dev);
1248 lcs_set_mc_addresses(card, in4_dev);
1250 in_dev_put(in4_dev);
1252 netif_carrier_off(card->dev);
1253 netif_tx_disable(card->dev);
1254 wait_event(card->write.wait_q,
1255 (card->write.state != LCS_CH_STATE_RUNNING));
1256 lcs_fix_multicast_list(card);
1257 if (card->state == DEV_STATE_UP) {
1258 netif_carrier_on(card->dev);
1259 netif_wake_queue(card->dev);
1262 lcs_clear_thread_running_bit(card, LCS_SET_MC_THREAD);
1265 #endif /* CONFIG_IP_MULTICAST */
1268 * function called by net device to
1269 * handle multicast address relevant things
1272 lcs_set_multicast_list(struct net_device *dev)
1274 #ifdef CONFIG_IP_MULTICAST
1275 struct lcs_card *card;
1277 LCS_DBF_TEXT(4, trace, "setmulti");
1278 card = (struct lcs_card *) dev->ml_priv;
1280 if (!lcs_set_thread_start_bit(card, LCS_SET_MC_THREAD))
1281 schedule_work(&card->kernel_thread_starter);
1282 #endif /* CONFIG_IP_MULTICAST */
1286 lcs_check_irb_error(struct ccw_device *cdev, struct irb *irb)
1291 switch (PTR_ERR(irb)) {
1293 dev_warn(&cdev->dev,
1294 "An I/O-error occurred on the LCS device\n");
1295 LCS_DBF_TEXT(2, trace, "ckirberr");
1296 LCS_DBF_TEXT_(2, trace, " rc%d", -EIO);
1299 dev_warn(&cdev->dev,
1300 "A command timed out on the LCS device\n");
1301 LCS_DBF_TEXT(2, trace, "ckirberr");
1302 LCS_DBF_TEXT_(2, trace, " rc%d", -ETIMEDOUT);
1305 dev_warn(&cdev->dev,
1306 "An error occurred on the LCS device, rc=%ld\n",
1308 LCS_DBF_TEXT(2, trace, "ckirberr");
1309 LCS_DBF_TEXT(2, trace, " rc???");
1311 return PTR_ERR(irb);
1315 lcs_get_problem(struct ccw_device *cdev, struct irb *irb)
1320 sense = (char *) irb->ecw;
1321 cstat = irb->scsw.cmd.cstat;
1322 dstat = irb->scsw.cmd.dstat;
1324 if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1325 SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1326 SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1327 LCS_DBF_TEXT(2, trace, "CGENCHK");
1330 if (dstat & DEV_STAT_UNIT_CHECK) {
1331 if (sense[LCS_SENSE_BYTE_1] &
1332 LCS_SENSE_RESETTING_EVENT) {
1333 LCS_DBF_TEXT(2, trace, "REVIND");
1336 if (sense[LCS_SENSE_BYTE_0] &
1337 LCS_SENSE_CMD_REJECT) {
1338 LCS_DBF_TEXT(2, trace, "CMDREJ");
1341 if ((!sense[LCS_SENSE_BYTE_0]) &&
1342 (!sense[LCS_SENSE_BYTE_1]) &&
1343 (!sense[LCS_SENSE_BYTE_2]) &&
1344 (!sense[LCS_SENSE_BYTE_3])) {
1345 LCS_DBF_TEXT(2, trace, "ZEROSEN");
1348 LCS_DBF_TEXT(2, trace, "DGENCHK");
1355 lcs_schedule_recovery(struct lcs_card *card)
1357 LCS_DBF_TEXT(2, trace, "startrec");
1358 if (!lcs_set_thread_start_bit(card, LCS_RECOVERY_THREAD))
1359 schedule_work(&card->kernel_thread_starter);
1363 * IRQ Handler for LCS channels
1366 lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
1368 struct lcs_card *card;
1369 struct lcs_channel *channel;
1373 if (lcs_check_irb_error(cdev, irb))
1376 card = CARD_FROM_DEV(cdev);
1377 if (card->read.ccwdev == cdev)
1378 channel = &card->read;
1380 channel = &card->write;
1382 cstat = irb->scsw.cmd.cstat;
1383 dstat = irb->scsw.cmd.dstat;
1384 LCS_DBF_TEXT_(5, trace, "Rint%s", dev_name(&cdev->dev));
1385 LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.cstat,
1386 irb->scsw.cmd.dstat);
1387 LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.fctl,
1388 irb->scsw.cmd.actl);
1390 /* Check for channel and device errors presented */
1391 rc = lcs_get_problem(cdev, irb);
1392 if (rc || (dstat & DEV_STAT_UNIT_EXCEP)) {
1393 dev_warn(&cdev->dev,
1394 "The LCS device stopped because of an error,"
1395 " dstat=0x%X, cstat=0x%X \n",
1398 channel->state = LCS_CH_STATE_ERROR;
1401 if (channel->state == LCS_CH_STATE_ERROR) {
1402 lcs_schedule_recovery(card);
1403 wake_up(&card->wait_q);
1406 /* How far in the ccw chain have we processed? */
1407 if ((channel->state != LCS_CH_STATE_INIT) &&
1408 (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) &&
1409 (irb->scsw.cmd.cpa != 0)) {
1410 index = (struct ccw1 *) __va((addr_t) irb->scsw.cmd.cpa)
1412 if ((irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) ||
1413 (irb->scsw.cmd.cstat & SCHN_STAT_PCI))
1414 /* Bloody io subsystem tells us lies about cpa... */
1415 index = (index - 1) & (LCS_NUM_BUFFS - 1);
1416 while (channel->io_idx != index) {
1417 __lcs_processed_buffer(channel,
1418 channel->iob + channel->io_idx);
1420 (channel->io_idx + 1) & (LCS_NUM_BUFFS - 1);
1424 if ((irb->scsw.cmd.dstat & DEV_STAT_DEV_END) ||
1425 (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) ||
1426 (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK))
1427 /* Mark channel as stopped. */
1428 channel->state = LCS_CH_STATE_STOPPED;
1429 else if (irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED)
1430 /* CCW execution stopped on a suspend bit. */
1431 channel->state = LCS_CH_STATE_SUSPENDED;
1432 if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1433 if (irb->scsw.cmd.cc != 0) {
1434 ccw_device_halt(channel->ccwdev, (addr_t) channel);
1437 /* The channel has been stopped by halt_IO. */
1438 channel->state = LCS_CH_STATE_HALTED;
1440 if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC)
1441 channel->state = LCS_CH_STATE_CLEARED;
1442 /* Do the rest in the tasklet. */
1443 tasklet_schedule(&channel->irq_tasklet);
1447 * Tasklet for IRQ handler
1450 lcs_tasklet(unsigned long data)
1452 unsigned long flags;
1453 struct lcs_channel *channel;
1454 struct lcs_buffer *iob;
1457 channel = (struct lcs_channel *) data;
1458 LCS_DBF_TEXT_(5, trace, "tlet%s", dev_name(&channel->ccwdev->dev));
1460 /* Check for processed buffers. */
1462 buf_idx = channel->buf_idx;
1463 while (iob[buf_idx].state == LCS_BUF_STATE_PROCESSED) {
1464 /* Do the callback thing. */
1465 if (iob[buf_idx].callback != NULL)
1466 iob[buf_idx].callback(channel, iob + buf_idx);
1467 buf_idx = (buf_idx + 1) & (LCS_NUM_BUFFS - 1);
1469 channel->buf_idx = buf_idx;
1471 if (channel->state == LCS_CH_STATE_STOPPED)
1472 lcs_start_channel(channel);
1473 spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1474 if (channel->state == LCS_CH_STATE_SUSPENDED &&
1475 channel->iob[channel->io_idx].state == LCS_BUF_STATE_READY)
1476 __lcs_resume_channel(channel);
1477 spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1479 /* Something happened on the channel. Wake up waiters. */
1480 wake_up(&channel->wait_q);
1484 * Finish current tx buffer and make it ready for transmit.
1487 __lcs_emit_txbuffer(struct lcs_card *card)
1489 LCS_DBF_TEXT(5, trace, "emittx");
1490 *(__u16 *)(card->tx_buffer->data + card->tx_buffer->count) = 0;
1491 card->tx_buffer->count += 2;
1492 lcs_ready_buffer(&card->write, card->tx_buffer);
1493 card->tx_buffer = NULL;
1498 * Callback for finished tx buffers.
1501 lcs_txbuffer_cb(struct lcs_channel *channel, struct lcs_buffer *buffer)
1503 struct lcs_card *card;
1505 LCS_DBF_TEXT(5, trace, "txbuffcb");
1506 /* Put buffer back to pool. */
1507 lcs_release_buffer(channel, buffer);
1508 card = container_of(channel, struct lcs_card, write);
1509 if (netif_queue_stopped(card->dev) && netif_carrier_ok(card->dev))
1510 netif_wake_queue(card->dev);
1511 spin_lock(&card->lock);
1513 if (card->tx_emitted <= 0 && card->tx_buffer != NULL)
1515 * Last running tx buffer has finished. Submit partially
1516 * filled current buffer.
1518 __lcs_emit_txbuffer(card);
1519 spin_unlock(&card->lock);
1523 * Packet transmit function called by network stack
1526 __lcs_start_xmit(struct lcs_card *card, struct sk_buff *skb,
1527 struct net_device *dev)
1529 struct lcs_header *header;
1530 int rc = NETDEV_TX_OK;
1532 LCS_DBF_TEXT(5, trace, "hardxmit");
1534 card->stats.tx_dropped++;
1535 card->stats.tx_errors++;
1536 return NETDEV_TX_OK;
1538 if (card->state != DEV_STATE_UP) {
1540 card->stats.tx_dropped++;
1541 card->stats.tx_errors++;
1542 card->stats.tx_carrier_errors++;
1543 return NETDEV_TX_OK;
1545 if (skb->protocol == htons(ETH_P_IPV6)) {
1547 return NETDEV_TX_OK;
1549 netif_stop_queue(card->dev);
1550 spin_lock(&card->lock);
1551 if (card->tx_buffer != NULL &&
1552 card->tx_buffer->count + sizeof(struct lcs_header) +
1553 skb->len + sizeof(u16) > LCS_IOBUFFERSIZE)
1554 /* skb too big for current tx buffer. */
1555 __lcs_emit_txbuffer(card);
1556 if (card->tx_buffer == NULL) {
1557 /* Get new tx buffer */
1558 card->tx_buffer = lcs_get_buffer(&card->write);
1559 if (card->tx_buffer == NULL) {
1560 card->stats.tx_dropped++;
1561 rc = NETDEV_TX_BUSY;
1564 card->tx_buffer->callback = lcs_txbuffer_cb;
1565 card->tx_buffer->count = 0;
1567 header = (struct lcs_header *)
1568 (card->tx_buffer->data + card->tx_buffer->count);
1569 card->tx_buffer->count += skb->len + sizeof(struct lcs_header);
1570 header->offset = card->tx_buffer->count;
1571 header->type = card->lan_type;
1572 header->slot = card->portno;
1573 skb_copy_from_linear_data(skb, header + 1, skb->len);
1574 spin_unlock(&card->lock);
1575 card->stats.tx_bytes += skb->len;
1576 card->stats.tx_packets++;
1578 netif_wake_queue(card->dev);
1579 spin_lock(&card->lock);
1580 if (card->tx_emitted <= 0 && card->tx_buffer != NULL)
1581 /* If this is the first tx buffer emit it immediately. */
1582 __lcs_emit_txbuffer(card);
1584 spin_unlock(&card->lock);
1589 lcs_start_xmit(struct sk_buff *skb, struct net_device *dev)
1591 struct lcs_card *card;
1594 LCS_DBF_TEXT(5, trace, "pktxmit");
1595 card = (struct lcs_card *) dev->ml_priv;
1596 rc = __lcs_start_xmit(card, skb, dev);
1601 * send startlan and lanstat command to make LCS device ready
1604 lcs_startlan_auto(struct lcs_card *card)
1608 LCS_DBF_TEXT(2, trace, "strtauto");
1609 #ifdef CONFIG_ETHERNET
1610 card->lan_type = LCS_FRAME_TYPE_ENET;
1611 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1617 card->lan_type = LCS_FRAME_TYPE_FDDI;
1618 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1626 lcs_startlan(struct lcs_card *card)
1630 LCS_DBF_TEXT(2, trace, "startlan");
1632 if (card->portno != LCS_INVALID_PORT_NO) {
1633 if (card->lan_type == LCS_FRAME_TYPE_AUTO)
1634 rc = lcs_startlan_auto(card);
1636 rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP);
1638 for (i = 0; i <= 16; i++) {
1640 if (card->lan_type != LCS_FRAME_TYPE_AUTO)
1641 rc = lcs_send_startlan(card,
1642 LCS_INITIATOR_TCPIP);
1644 /* autodetecting lan type */
1645 rc = lcs_startlan_auto(card);
1651 return lcs_send_lanstat(card);
1656 * LCS detect function
1657 * setup channels and make them I/O ready
1660 lcs_detect(struct lcs_card *card)
1664 LCS_DBF_TEXT(2, setup, "lcsdetct");
1665 /* start/reset card */
1667 netif_stop_queue(card->dev);
1668 rc = lcs_stop_channels(card);
1670 rc = lcs_start_channels(card);
1672 rc = lcs_send_startup(card, LCS_INITIATOR_TCPIP);
1674 rc = lcs_startlan(card);
1678 card->state = DEV_STATE_UP;
1680 card->state = DEV_STATE_DOWN;
1681 card->write.state = LCS_CH_STATE_INIT;
1682 card->read.state = LCS_CH_STATE_INIT;
1691 lcs_stopcard(struct lcs_card *card)
1695 LCS_DBF_TEXT(3, setup, "stopcard");
1697 if (card->read.state != LCS_CH_STATE_STOPPED &&
1698 card->write.state != LCS_CH_STATE_STOPPED &&
1699 card->read.state != LCS_CH_STATE_ERROR &&
1700 card->write.state != LCS_CH_STATE_ERROR &&
1701 card->state == DEV_STATE_UP) {
1702 lcs_clear_multicast_list(card);
1703 rc = lcs_send_stoplan(card,LCS_INITIATOR_TCPIP);
1704 rc = lcs_send_shutdown(card);
1706 rc = lcs_stop_channels(card);
1707 card->state = DEV_STATE_DOWN;
1713 * Kernel Thread helper functions for LGW initiated commands
1716 lcs_start_kernel_thread(struct work_struct *work)
1718 struct lcs_card *card = container_of(work, struct lcs_card, kernel_thread_starter);
1719 LCS_DBF_TEXT(5, trace, "krnthrd");
1720 if (lcs_do_start_thread(card, LCS_RECOVERY_THREAD))
1721 kthread_run(lcs_recovery, card, "lcs_recover");
1722 #ifdef CONFIG_IP_MULTICAST
1723 if (lcs_do_start_thread(card, LCS_SET_MC_THREAD))
1724 kthread_run(lcs_register_mc_addresses, card, "regipm");
1729 * Process control frames.
1732 lcs_get_control(struct lcs_card *card, struct lcs_cmd *cmd)
1734 LCS_DBF_TEXT(5, trace, "getctrl");
1735 if (cmd->initiator == LCS_INITIATOR_LGW) {
1736 switch(cmd->cmd_code) {
1737 case LCS_CMD_STARTUP:
1738 case LCS_CMD_STARTLAN:
1739 lcs_schedule_recovery(card);
1741 case LCS_CMD_STOPLAN:
1742 pr_warn("Stoplan for %s initiated by LGW\n",
1745 netif_carrier_off(card->dev);
1748 LCS_DBF_TEXT(5, trace, "noLGWcmd");
1752 lcs_notify_lancmd_waiters(card, cmd);
1756 * Unpack network packet.
1759 lcs_get_skb(struct lcs_card *card, char *skb_data, unsigned int skb_len)
1761 struct sk_buff *skb;
1763 LCS_DBF_TEXT(5, trace, "getskb");
1764 if (card->dev == NULL ||
1765 card->state != DEV_STATE_UP)
1766 /* The card isn't up. Ignore the packet. */
1769 skb = dev_alloc_skb(skb_len);
1771 dev_err(&card->dev->dev,
1772 " Allocating a socket buffer to interface %s failed\n",
1774 card->stats.rx_dropped++;
1777 skb_put_data(skb, skb_data, skb_len);
1778 skb->protocol = card->lan_type_trans(skb, card->dev);
1779 card->stats.rx_bytes += skb_len;
1780 card->stats.rx_packets++;
1781 if (skb->protocol == htons(ETH_P_802_2))
1782 *((__u32 *)skb->cb) = ++card->pkt_seq;
1787 * LCS main routine to get packets and lancmd replies from the buffers
1790 lcs_get_frames_cb(struct lcs_channel *channel, struct lcs_buffer *buffer)
1792 struct lcs_card *card;
1793 struct lcs_header *lcs_hdr;
1796 LCS_DBF_TEXT(5, trace, "lcsgtpkt");
1797 lcs_hdr = (struct lcs_header *) buffer->data;
1798 if (lcs_hdr->offset == LCS_ILLEGAL_OFFSET) {
1799 LCS_DBF_TEXT(4, trace, "-eiogpkt");
1802 card = container_of(channel, struct lcs_card, read);
1804 while (lcs_hdr->offset != 0) {
1805 if (lcs_hdr->offset <= 0 ||
1806 lcs_hdr->offset > LCS_IOBUFFERSIZE ||
1807 lcs_hdr->offset < offset) {
1808 /* Offset invalid. */
1809 card->stats.rx_length_errors++;
1810 card->stats.rx_errors++;
1813 /* What kind of frame is it? */
1814 if (lcs_hdr->type == LCS_FRAME_TYPE_CONTROL)
1815 /* Control frame. */
1816 lcs_get_control(card, (struct lcs_cmd *) lcs_hdr);
1817 else if (lcs_hdr->type == LCS_FRAME_TYPE_ENET ||
1818 lcs_hdr->type == LCS_FRAME_TYPE_TR ||
1819 lcs_hdr->type == LCS_FRAME_TYPE_FDDI)
1820 /* Normal network packet. */
1821 lcs_get_skb(card, (char *)(lcs_hdr + 1),
1822 lcs_hdr->offset - offset -
1823 sizeof(struct lcs_header));
1825 /* Unknown frame type. */
1826 ; // FIXME: error message ?
1827 /* Proceed to next frame. */
1828 offset = lcs_hdr->offset;
1829 lcs_hdr->offset = LCS_ILLEGAL_OFFSET;
1830 lcs_hdr = (struct lcs_header *) (buffer->data + offset);
1832 /* The buffer is now empty. Make it ready again. */
1833 lcs_ready_buffer(&card->read, buffer);
1837 * get network statistics for ifconfig and other user programs
1839 static struct net_device_stats *
1840 lcs_getstats(struct net_device *dev)
1842 struct lcs_card *card;
1844 LCS_DBF_TEXT(4, trace, "netstats");
1845 card = (struct lcs_card *) dev->ml_priv;
1846 return &card->stats;
1851 * This function will be called by user doing ifconfig xxx down
1854 lcs_stop_device(struct net_device *dev)
1856 struct lcs_card *card;
1859 LCS_DBF_TEXT(2, trace, "stopdev");
1860 card = (struct lcs_card *) dev->ml_priv;
1861 netif_carrier_off(dev);
1862 netif_tx_disable(dev);
1863 dev->flags &= ~IFF_UP;
1864 wait_event(card->write.wait_q,
1865 (card->write.state != LCS_CH_STATE_RUNNING));
1866 rc = lcs_stopcard(card);
1868 dev_err(&card->dev->dev,
1869 " Shutting down the LCS device failed\n");
1874 * start lcs device and make it runnable
1875 * This function will be called by user doing ifconfig xxx up
1878 lcs_open_device(struct net_device *dev)
1880 struct lcs_card *card;
1883 LCS_DBF_TEXT(2, trace, "opendev");
1884 card = (struct lcs_card *) dev->ml_priv;
1885 /* initialize statistics */
1886 rc = lcs_detect(card);
1888 pr_err("Error in opening device!\n");
1891 dev->flags |= IFF_UP;
1892 netif_carrier_on(dev);
1893 netif_wake_queue(dev);
1894 card->state = DEV_STATE_UP;
1900 * show function for portno called by cat or similar things
1903 lcs_portno_show (struct device *dev, struct device_attribute *attr, char *buf)
1905 struct lcs_card *card;
1907 card = dev_get_drvdata(dev);
1912 return sprintf(buf, "%d\n", card->portno);
1916 * store the value which is piped to file portno
1919 lcs_portno_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1921 struct lcs_card *card;
1925 card = dev_get_drvdata(dev);
1930 rc = kstrtos16(buf, 0, &value);
1933 /* TODO: sanity checks */
1934 card->portno = value;
1940 static DEVICE_ATTR(portno, 0644, lcs_portno_show, lcs_portno_store);
1942 static const char *lcs_type[] = {
1947 "unknown channel type",
1948 "unsupported channel type",
1952 lcs_type_show(struct device *dev, struct device_attribute *attr, char *buf)
1954 struct ccwgroup_device *cgdev;
1956 cgdev = to_ccwgroupdev(dev);
1960 return sprintf(buf, "%s\n", lcs_type[cgdev->cdev[0]->id.driver_info]);
1963 static DEVICE_ATTR(type, 0444, lcs_type_show, NULL);
1966 lcs_timeout_show(struct device *dev, struct device_attribute *attr, char *buf)
1968 struct lcs_card *card;
1970 card = dev_get_drvdata(dev);
1972 return card ? sprintf(buf, "%u\n", card->lancmd_timeout) : 0;
1976 lcs_timeout_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1978 struct lcs_card *card;
1982 card = dev_get_drvdata(dev);
1987 rc = kstrtouint(buf, 0, &value);
1990 /* TODO: sanity checks */
1991 card->lancmd_timeout = value;
1997 static DEVICE_ATTR(lancmd_timeout, 0644, lcs_timeout_show, lcs_timeout_store);
2000 lcs_dev_recover_store(struct device *dev, struct device_attribute *attr,
2001 const char *buf, size_t count)
2003 struct lcs_card *card = dev_get_drvdata(dev);
2009 if (card->state != DEV_STATE_UP)
2011 i = simple_strtoul(buf, &tmp, 16);
2013 lcs_schedule_recovery(card);
2017 static DEVICE_ATTR(recover, 0200, NULL, lcs_dev_recover_store);
2019 static struct attribute * lcs_attrs[] = {
2020 &dev_attr_portno.attr,
2021 &dev_attr_type.attr,
2022 &dev_attr_lancmd_timeout.attr,
2023 &dev_attr_recover.attr,
2026 static struct attribute_group lcs_attr_group = {
2029 static const struct attribute_group *lcs_attr_groups[] = {
2033 static const struct device_type lcs_devtype = {
2035 .groups = lcs_attr_groups,
2039 * lcs_probe_device is called on establishing a new ccwgroup_device.
2042 lcs_probe_device(struct ccwgroup_device *ccwgdev)
2044 struct lcs_card *card;
2046 if (!get_device(&ccwgdev->dev))
2049 LCS_DBF_TEXT(2, setup, "add_dev");
2050 card = lcs_alloc_card();
2052 LCS_DBF_TEXT_(2, setup, " rc%d", -ENOMEM);
2053 put_device(&ccwgdev->dev);
2056 dev_set_drvdata(&ccwgdev->dev, card);
2057 ccwgdev->cdev[0]->handler = lcs_irq;
2058 ccwgdev->cdev[1]->handler = lcs_irq;
2059 card->gdev = ccwgdev;
2060 INIT_WORK(&card->kernel_thread_starter, lcs_start_kernel_thread);
2061 card->thread_start_mask = 0;
2062 card->thread_allowed_mask = 0;
2063 card->thread_running_mask = 0;
2064 ccwgdev->dev.type = &lcs_devtype;
2070 lcs_register_netdev(struct ccwgroup_device *ccwgdev)
2072 struct lcs_card *card;
2074 LCS_DBF_TEXT(2, setup, "regnetdv");
2075 card = dev_get_drvdata(&ccwgdev->dev);
2076 if (card->dev->reg_state != NETREG_UNINITIALIZED)
2078 SET_NETDEV_DEV(card->dev, &ccwgdev->dev);
2079 return register_netdev(card->dev);
2083 * lcs_new_device will be called by setting the group device online.
2085 static const struct net_device_ops lcs_netdev_ops = {
2086 .ndo_open = lcs_open_device,
2087 .ndo_stop = lcs_stop_device,
2088 .ndo_get_stats = lcs_getstats,
2089 .ndo_start_xmit = lcs_start_xmit,
2092 static const struct net_device_ops lcs_mc_netdev_ops = {
2093 .ndo_open = lcs_open_device,
2094 .ndo_stop = lcs_stop_device,
2095 .ndo_get_stats = lcs_getstats,
2096 .ndo_start_xmit = lcs_start_xmit,
2097 .ndo_set_rx_mode = lcs_set_multicast_list,
2101 lcs_new_device(struct ccwgroup_device *ccwgdev)
2103 struct lcs_card *card;
2104 struct net_device *dev=NULL;
2105 enum lcs_dev_states recover_state;
2108 card = dev_get_drvdata(&ccwgdev->dev);
2112 LCS_DBF_TEXT(2, setup, "newdev");
2113 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
2114 card->read.ccwdev = ccwgdev->cdev[0];
2115 card->write.ccwdev = ccwgdev->cdev[1];
2117 recover_state = card->state;
2118 rc = ccw_device_set_online(card->read.ccwdev);
2121 rc = ccw_device_set_online(card->write.ccwdev);
2125 LCS_DBF_TEXT(3, setup, "lcsnewdv");
2127 lcs_setup_card(card);
2128 rc = lcs_detect(card);
2130 LCS_DBF_TEXT(2, setup, "dtctfail");
2131 dev_err(&ccwgdev->dev,
2132 "Detecting a network adapter for LCS devices"
2133 " failed with rc=%d (0x%x)\n", rc, rc);
2138 LCS_DBF_TEXT(2, setup, "samedev");
2139 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
2142 switch (card->lan_type) {
2143 #ifdef CONFIG_ETHERNET
2144 case LCS_FRAME_TYPE_ENET:
2145 card->lan_type_trans = eth_type_trans;
2146 dev = alloc_etherdev(0);
2150 case LCS_FRAME_TYPE_FDDI:
2151 card->lan_type_trans = fddi_type_trans;
2152 dev = alloc_fddidev(0);
2156 LCS_DBF_TEXT(3, setup, "errinit");
2157 pr_err(" Initialization failed\n");
2163 card->dev->ml_priv = card;
2164 card->dev->netdev_ops = &lcs_netdev_ops;
2165 memcpy(card->dev->dev_addr, card->mac, LCS_MAC_LENGTH);
2166 #ifdef CONFIG_IP_MULTICAST
2167 if (!lcs_check_multicast_support(card))
2168 card->dev->netdev_ops = &lcs_mc_netdev_ops;
2171 lcs_set_allowed_threads(card,0xffffffff);
2172 if (recover_state == DEV_STATE_RECOVER) {
2173 lcs_set_multicast_list(card->dev);
2174 card->dev->flags |= IFF_UP;
2175 netif_carrier_on(card->dev);
2176 netif_wake_queue(card->dev);
2177 card->state = DEV_STATE_UP;
2182 if (lcs_register_netdev(ccwgdev) != 0)
2185 /* Print out supported assists: IPv6 */
2186 pr_info("LCS device %s %s IPv6 support\n", card->dev->name,
2187 (card->ip_assists_supported & LCS_IPASS_IPV6_SUPPORT) ?
2188 "with" : "without");
2189 /* Print out supported assist: Multicast */
2190 pr_info("LCS device %s %s Multicast support\n", card->dev->name,
2191 (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) ?
2192 "with" : "without");
2196 ccw_device_set_offline(card->write.ccwdev);
2198 ccw_device_set_offline(card->read.ccwdev);
2204 * lcs_shutdown_device, called when setting the group device offline.
2207 __lcs_shutdown_device(struct ccwgroup_device *ccwgdev, int recovery_mode)
2209 struct lcs_card *card;
2210 enum lcs_dev_states recover_state;
2211 int ret = 0, ret2 = 0, ret3 = 0;
2213 LCS_DBF_TEXT(3, setup, "shtdndev");
2214 card = dev_get_drvdata(&ccwgdev->dev);
2217 if (recovery_mode == 0) {
2218 lcs_set_allowed_threads(card, 0);
2219 if (lcs_wait_for_threads(card, LCS_SET_MC_THREAD))
2220 return -ERESTARTSYS;
2222 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
2223 recover_state = card->state;
2225 ret = lcs_stop_device(card->dev);
2226 ret2 = ccw_device_set_offline(card->read.ccwdev);
2227 ret3 = ccw_device_set_offline(card->write.ccwdev);
2229 ret = (ret2) ? ret2 : ret3;
2231 LCS_DBF_TEXT_(3, setup, "1err:%d", ret);
2232 if (recover_state == DEV_STATE_UP) {
2233 card->state = DEV_STATE_RECOVER;
2239 lcs_shutdown_device(struct ccwgroup_device *ccwgdev)
2241 return __lcs_shutdown_device(ccwgdev, 0);
2245 * drive lcs recovery after startup and startlan initiated by Lan Gateway
2248 lcs_recovery(void *ptr)
2250 struct lcs_card *card;
2251 struct ccwgroup_device *gdev;
2254 card = (struct lcs_card *) ptr;
2256 LCS_DBF_TEXT(4, trace, "recover1");
2257 if (!lcs_do_run_thread(card, LCS_RECOVERY_THREAD))
2259 LCS_DBF_TEXT(4, trace, "recover2");
2261 dev_warn(&gdev->dev,
2262 "A recovery process has been started for the LCS device\n");
2263 rc = __lcs_shutdown_device(gdev, 1);
2264 rc = lcs_new_device(gdev);
2266 pr_info("Device %s successfully recovered!\n",
2269 pr_info("Device %s could not be recovered!\n",
2271 lcs_clear_thread_running_bit(card, LCS_RECOVERY_THREAD);
2276 * lcs_remove_device, free buffers and card
2279 lcs_remove_device(struct ccwgroup_device *ccwgdev)
2281 struct lcs_card *card;
2283 card = dev_get_drvdata(&ccwgdev->dev);
2287 LCS_DBF_TEXT(3, setup, "remdev");
2288 LCS_DBF_HEX(3, setup, &card, sizeof(void*));
2289 if (ccwgdev->state == CCWGROUP_ONLINE) {
2290 lcs_shutdown_device(ccwgdev);
2293 unregister_netdev(card->dev);
2294 lcs_cleanup_card(card);
2295 lcs_free_card(card);
2296 dev_set_drvdata(&ccwgdev->dev, NULL);
2297 put_device(&ccwgdev->dev);
2300 static int lcs_pm_suspend(struct lcs_card *card)
2303 netif_device_detach(card->dev);
2304 lcs_set_allowed_threads(card, 0);
2305 lcs_wait_for_threads(card, 0xffffffff);
2306 if (card->state != DEV_STATE_DOWN)
2307 __lcs_shutdown_device(card->gdev, 1);
2311 static int lcs_pm_resume(struct lcs_card *card)
2315 if (card->state == DEV_STATE_RECOVER)
2316 rc = lcs_new_device(card->gdev);
2318 netif_device_attach(card->dev);
2320 dev_warn(&card->gdev->dev, "The lcs device driver "
2321 "failed to recover the device\n");
2326 static int lcs_prepare(struct ccwgroup_device *gdev)
2331 static void lcs_complete(struct ccwgroup_device *gdev)
2336 static int lcs_freeze(struct ccwgroup_device *gdev)
2338 struct lcs_card *card = dev_get_drvdata(&gdev->dev);
2339 return lcs_pm_suspend(card);
2342 static int lcs_thaw(struct ccwgroup_device *gdev)
2344 struct lcs_card *card = dev_get_drvdata(&gdev->dev);
2345 return lcs_pm_resume(card);
2348 static int lcs_restore(struct ccwgroup_device *gdev)
2350 struct lcs_card *card = dev_get_drvdata(&gdev->dev);
2351 return lcs_pm_resume(card);
2354 static struct ccw_device_id lcs_ids[] = {
2355 {CCW_DEVICE(0x3088, 0x08), .driver_info = lcs_channel_type_parallel},
2356 {CCW_DEVICE(0x3088, 0x1f), .driver_info = lcs_channel_type_2216},
2357 {CCW_DEVICE(0x3088, 0x60), .driver_info = lcs_channel_type_osa2},
2360 MODULE_DEVICE_TABLE(ccw, lcs_ids);
2362 static struct ccw_driver lcs_ccw_driver = {
2364 .owner = THIS_MODULE,
2368 .probe = ccwgroup_probe_ccwdev,
2369 .remove = ccwgroup_remove_ccwdev,
2370 .int_class = IRQIO_LCS,
2374 * LCS ccwgroup driver registration
2376 static struct ccwgroup_driver lcs_group_driver = {
2378 .owner = THIS_MODULE,
2381 .ccw_driver = &lcs_ccw_driver,
2382 .setup = lcs_probe_device,
2383 .remove = lcs_remove_device,
2384 .set_online = lcs_new_device,
2385 .set_offline = lcs_shutdown_device,
2386 .prepare = lcs_prepare,
2387 .complete = lcs_complete,
2388 .freeze = lcs_freeze,
2390 .restore = lcs_restore,
2393 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
2397 err = ccwgroup_create_dev(lcs_root_dev, &lcs_group_driver, 2, buf);
2398 return err ? err : count;
2400 static DRIVER_ATTR_WO(group);
2402 static struct attribute *lcs_drv_attrs[] = {
2403 &driver_attr_group.attr,
2406 static struct attribute_group lcs_drv_attr_group = {
2407 .attrs = lcs_drv_attrs,
2409 static const struct attribute_group *lcs_drv_attr_groups[] = {
2410 &lcs_drv_attr_group,
2415 * LCS Module/Kernel initialization function
2418 __init lcs_init_module(void)
2422 pr_info("Loading %s\n", version);
2423 rc = lcs_register_debug_facility();
2424 LCS_DBF_TEXT(0, setup, "lcsinit");
2427 lcs_root_dev = root_device_register("lcs");
2428 rc = PTR_ERR_OR_ZERO(lcs_root_dev);
2431 rc = ccw_driver_register(&lcs_ccw_driver);
2434 lcs_group_driver.driver.groups = lcs_drv_attr_groups;
2435 rc = ccwgroup_driver_register(&lcs_group_driver);
2441 ccw_driver_unregister(&lcs_ccw_driver);
2443 root_device_unregister(lcs_root_dev);
2445 lcs_unregister_debug_facility();
2447 pr_err("Initializing the lcs device driver failed\n");
2453 * LCS module cleanup function
2456 __exit lcs_cleanup_module(void)
2458 pr_info("Terminating lcs module.\n");
2459 LCS_DBF_TEXT(0, trace, "cleanup");
2460 ccwgroup_driver_unregister(&lcs_group_driver);
2461 ccw_driver_unregister(&lcs_ccw_driver);
2462 root_device_unregister(lcs_root_dev);
2463 lcs_unregister_debug_facility();
2466 module_init(lcs_init_module);
2467 module_exit(lcs_cleanup_module);
2469 MODULE_AUTHOR("Frank Pavlic <fpavlic@de.ibm.com>");
2470 MODULE_LICENSE("GPL");