2 * Linux for S/390 Lan Channel Station Network Driver
4 * Copyright IBM Corp. 1999, 2009
5 * Author(s): Original Code written by
6 * DJ Barrow <djbarrow@de.ibm.com,barrow_dj@yahoo.com>
8 * Frank Pavlic <fpavlic@de.ibm.com> and
9 * Martin Schwidefsky <schwidefsky@de.ibm.com>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #define KMSG_COMPONENT "lcs"
27 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
29 #include <linux/module.h>
31 #include <linux/netdevice.h>
32 #include <linux/etherdevice.h>
33 #include <linux/fddidevice.h>
34 #include <linux/inetdevice.h>
36 #include <linux/igmp.h>
37 #include <linux/delay.h>
38 #include <linux/kthread.h>
39 #include <linux/slab.h>
43 #include <asm/debug.h>
44 #include <asm/idals.h>
45 #include <asm/timex.h>
46 #include <linux/device.h>
47 #include <asm/ccwgroup.h>
52 #if !defined(CONFIG_ETHERNET) && !defined(CONFIG_FDDI)
53 #error Cannot compile lcs.c without some net devices switched on.
57 * initialization string for output
60 static char version
[] __initdata
= "LCS driver";
63 * the root device for lcs group devices
65 static struct device
*lcs_root_dev
;
70 static void lcs_tasklet(unsigned long);
71 static void lcs_start_kernel_thread(struct work_struct
*);
72 static void lcs_get_frames_cb(struct lcs_channel
*, struct lcs_buffer
*);
73 #ifdef CONFIG_IP_MULTICAST
74 static int lcs_send_delipm(struct lcs_card
*, struct lcs_ipm_list
*);
75 #endif /* CONFIG_IP_MULTICAST */
76 static int lcs_recovery(void *ptr
);
79 * Debug Facility Stuff
81 static char debug_buffer
[255];
82 static debug_info_t
*lcs_dbf_setup
;
83 static debug_info_t
*lcs_dbf_trace
;
86 * LCS Debug Facility functions
89 lcs_unregister_debug_facility(void)
92 debug_unregister(lcs_dbf_setup
);
94 debug_unregister(lcs_dbf_trace
);
98 lcs_register_debug_facility(void)
100 lcs_dbf_setup
= debug_register("lcs_setup", 2, 1, 8);
101 lcs_dbf_trace
= debug_register("lcs_trace", 4, 1, 8);
102 if (lcs_dbf_setup
== NULL
|| lcs_dbf_trace
== NULL
) {
103 pr_err("Not enough memory for debug facility.\n");
104 lcs_unregister_debug_facility();
107 debug_register_view(lcs_dbf_setup
, &debug_hex_ascii_view
);
108 debug_set_level(lcs_dbf_setup
, 2);
109 debug_register_view(lcs_dbf_trace
, &debug_hex_ascii_view
);
110 debug_set_level(lcs_dbf_trace
, 2);
115 * Allocate io buffers.
118 lcs_alloc_channel(struct lcs_channel
*channel
)
122 LCS_DBF_TEXT(2, setup
, "ichalloc");
123 for (cnt
= 0; cnt
< LCS_NUM_BUFFS
; cnt
++) {
124 /* alloc memory fo iobuffer */
125 channel
->iob
[cnt
].data
=
126 kzalloc(LCS_IOBUFFERSIZE
, GFP_DMA
| GFP_KERNEL
);
127 if (channel
->iob
[cnt
].data
== NULL
)
129 channel
->iob
[cnt
].state
= LCS_BUF_STATE_EMPTY
;
131 if (cnt
< LCS_NUM_BUFFS
) {
132 /* Not all io buffers could be allocated. */
133 LCS_DBF_TEXT(2, setup
, "echalloc");
135 kfree(channel
->iob
[cnt
].data
);
145 lcs_free_channel(struct lcs_channel
*channel
)
149 LCS_DBF_TEXT(2, setup
, "ichfree");
150 for (cnt
= 0; cnt
< LCS_NUM_BUFFS
; cnt
++) {
151 kfree(channel
->iob
[cnt
].data
);
152 channel
->iob
[cnt
].data
= NULL
;
160 lcs_cleanup_channel(struct lcs_channel
*channel
)
162 LCS_DBF_TEXT(3, setup
, "cleanch");
163 /* Kill write channel tasklets. */
164 tasklet_kill(&channel
->irq_tasklet
);
165 /* Free channel buffers. */
166 lcs_free_channel(channel
);
170 * LCS free memory for card and channels.
173 lcs_free_card(struct lcs_card
*card
)
175 LCS_DBF_TEXT(2, setup
, "remcard");
176 LCS_DBF_HEX(2, setup
, &card
, sizeof(void*));
181 * LCS alloc memory for card and channels
183 static struct lcs_card
*
186 struct lcs_card
*card
;
189 LCS_DBF_TEXT(2, setup
, "alloclcs");
191 card
= kzalloc(sizeof(struct lcs_card
), GFP_KERNEL
| GFP_DMA
);
194 card
->lan_type
= LCS_FRAME_TYPE_AUTO
;
196 card
->lancmd_timeout
= LCS_LANCMD_TIMEOUT_DEFAULT
;
197 /* Allocate io buffers for the read channel. */
198 rc
= lcs_alloc_channel(&card
->read
);
200 LCS_DBF_TEXT(2, setup
, "iccwerr");
204 /* Allocate io buffers for the write channel. */
205 rc
= lcs_alloc_channel(&card
->write
);
207 LCS_DBF_TEXT(2, setup
, "iccwerr");
208 lcs_cleanup_channel(&card
->read
);
213 #ifdef CONFIG_IP_MULTICAST
214 INIT_LIST_HEAD(&card
->ipm_list
);
216 LCS_DBF_HEX(2, setup
, &card
, sizeof(void*));
221 * Setup read channel.
224 lcs_setup_read_ccws(struct lcs_card
*card
)
228 LCS_DBF_TEXT(2, setup
, "ireadccw");
229 /* Setup read ccws. */
230 memset(card
->read
.ccws
, 0, sizeof (struct ccw1
) * (LCS_NUM_BUFFS
+ 1));
231 for (cnt
= 0; cnt
< LCS_NUM_BUFFS
; cnt
++) {
232 card
->read
.ccws
[cnt
].cmd_code
= LCS_CCW_READ
;
233 card
->read
.ccws
[cnt
].count
= LCS_IOBUFFERSIZE
;
234 card
->read
.ccws
[cnt
].flags
=
235 CCW_FLAG_CC
| CCW_FLAG_SLI
| CCW_FLAG_PCI
;
237 * Note: we have allocated the buffer with GFP_DMA, so
238 * we do not need to do set_normalized_cda.
240 card
->read
.ccws
[cnt
].cda
=
241 (__u32
) __pa(card
->read
.iob
[cnt
].data
);
242 ((struct lcs_header
*)
243 card
->read
.iob
[cnt
].data
)->offset
= LCS_ILLEGAL_OFFSET
;
244 card
->read
.iob
[cnt
].callback
= lcs_get_frames_cb
;
245 card
->read
.iob
[cnt
].state
= LCS_BUF_STATE_READY
;
246 card
->read
.iob
[cnt
].count
= LCS_IOBUFFERSIZE
;
248 card
->read
.ccws
[0].flags
&= ~CCW_FLAG_PCI
;
249 card
->read
.ccws
[LCS_NUM_BUFFS
- 1].flags
&= ~CCW_FLAG_PCI
;
250 card
->read
.ccws
[LCS_NUM_BUFFS
- 1].flags
|= CCW_FLAG_SUSPEND
;
251 /* Last ccw is a tic (transfer in channel). */
252 card
->read
.ccws
[LCS_NUM_BUFFS
].cmd_code
= LCS_CCW_TRANSFER
;
253 card
->read
.ccws
[LCS_NUM_BUFFS
].cda
=
254 (__u32
) __pa(card
->read
.ccws
);
255 /* Setg initial state of the read channel. */
256 card
->read
.state
= LCS_CH_STATE_INIT
;
258 card
->read
.io_idx
= 0;
259 card
->read
.buf_idx
= 0;
263 lcs_setup_read(struct lcs_card
*card
)
265 LCS_DBF_TEXT(3, setup
, "initread");
267 lcs_setup_read_ccws(card
);
268 /* Initialize read channel tasklet. */
269 card
->read
.irq_tasklet
.data
= (unsigned long) &card
->read
;
270 card
->read
.irq_tasklet
.func
= lcs_tasklet
;
271 /* Initialize waitqueue. */
272 init_waitqueue_head(&card
->read
.wait_q
);
276 * Setup write channel.
279 lcs_setup_write_ccws(struct lcs_card
*card
)
283 LCS_DBF_TEXT(3, setup
, "iwritccw");
284 /* Setup write ccws. */
285 memset(card
->write
.ccws
, 0, sizeof(struct ccw1
) * (LCS_NUM_BUFFS
+ 1));
286 for (cnt
= 0; cnt
< LCS_NUM_BUFFS
; cnt
++) {
287 card
->write
.ccws
[cnt
].cmd_code
= LCS_CCW_WRITE
;
288 card
->write
.ccws
[cnt
].count
= 0;
289 card
->write
.ccws
[cnt
].flags
=
290 CCW_FLAG_SUSPEND
| CCW_FLAG_CC
| CCW_FLAG_SLI
;
292 * Note: we have allocated the buffer with GFP_DMA, so
293 * we do not need to do set_normalized_cda.
295 card
->write
.ccws
[cnt
].cda
=
296 (__u32
) __pa(card
->write
.iob
[cnt
].data
);
298 /* Last ccw is a tic (transfer in channel). */
299 card
->write
.ccws
[LCS_NUM_BUFFS
].cmd_code
= LCS_CCW_TRANSFER
;
300 card
->write
.ccws
[LCS_NUM_BUFFS
].cda
=
301 (__u32
) __pa(card
->write
.ccws
);
302 /* Set initial state of the write channel. */
303 card
->read
.state
= LCS_CH_STATE_INIT
;
305 card
->write
.io_idx
= 0;
306 card
->write
.buf_idx
= 0;
310 lcs_setup_write(struct lcs_card
*card
)
312 LCS_DBF_TEXT(3, setup
, "initwrit");
314 lcs_setup_write_ccws(card
);
315 /* Initialize write channel tasklet. */
316 card
->write
.irq_tasklet
.data
= (unsigned long) &card
->write
;
317 card
->write
.irq_tasklet
.func
= lcs_tasklet
;
318 /* Initialize waitqueue. */
319 init_waitqueue_head(&card
->write
.wait_q
);
323 lcs_set_allowed_threads(struct lcs_card
*card
, unsigned long threads
)
327 spin_lock_irqsave(&card
->mask_lock
, flags
);
328 card
->thread_allowed_mask
= threads
;
329 spin_unlock_irqrestore(&card
->mask_lock
, flags
);
330 wake_up(&card
->wait_q
);
333 lcs_threads_running(struct lcs_card
*card
, unsigned long threads
)
338 spin_lock_irqsave(&card
->mask_lock
, flags
);
339 rc
= (card
->thread_running_mask
& threads
);
340 spin_unlock_irqrestore(&card
->mask_lock
, flags
);
345 lcs_wait_for_threads(struct lcs_card
*card
, unsigned long threads
)
347 return wait_event_interruptible(card
->wait_q
,
348 lcs_threads_running(card
, threads
) == 0);
352 lcs_set_thread_start_bit(struct lcs_card
*card
, unsigned long thread
)
356 spin_lock_irqsave(&card
->mask_lock
, flags
);
357 if ( !(card
->thread_allowed_mask
& thread
) ||
358 (card
->thread_start_mask
& thread
) ) {
359 spin_unlock_irqrestore(&card
->mask_lock
, flags
);
362 card
->thread_start_mask
|= thread
;
363 spin_unlock_irqrestore(&card
->mask_lock
, flags
);
368 lcs_clear_thread_running_bit(struct lcs_card
*card
, unsigned long thread
)
372 spin_lock_irqsave(&card
->mask_lock
, flags
);
373 card
->thread_running_mask
&= ~thread
;
374 spin_unlock_irqrestore(&card
->mask_lock
, flags
);
375 wake_up(&card
->wait_q
);
379 __lcs_do_run_thread(struct lcs_card
*card
, unsigned long thread
)
384 spin_lock_irqsave(&card
->mask_lock
, flags
);
385 if (card
->thread_start_mask
& thread
){
386 if ((card
->thread_allowed_mask
& thread
) &&
387 !(card
->thread_running_mask
& thread
)){
389 card
->thread_start_mask
&= ~thread
;
390 card
->thread_running_mask
|= thread
;
394 spin_unlock_irqrestore(&card
->mask_lock
, flags
);
399 lcs_do_run_thread(struct lcs_card
*card
, unsigned long thread
)
402 wait_event(card
->wait_q
,
403 (rc
= __lcs_do_run_thread(card
, thread
)) >= 0);
408 lcs_do_start_thread(struct lcs_card
*card
, unsigned long thread
)
413 spin_lock_irqsave(&card
->mask_lock
, flags
);
414 LCS_DBF_TEXT_(4, trace
, " %02x%02x%02x",
415 (u8
) card
->thread_start_mask
,
416 (u8
) card
->thread_allowed_mask
,
417 (u8
) card
->thread_running_mask
);
418 rc
= (card
->thread_start_mask
& thread
);
419 spin_unlock_irqrestore(&card
->mask_lock
, flags
);
424 * Initialize channels,card and state machines.
427 lcs_setup_card(struct lcs_card
*card
)
429 LCS_DBF_TEXT(2, setup
, "initcard");
430 LCS_DBF_HEX(2, setup
, &card
, sizeof(void*));
432 lcs_setup_read(card
);
433 lcs_setup_write(card
);
434 /* Set cards initial state. */
435 card
->state
= DEV_STATE_DOWN
;
436 card
->tx_buffer
= NULL
;
437 card
->tx_emitted
= 0;
439 init_waitqueue_head(&card
->wait_q
);
440 spin_lock_init(&card
->lock
);
441 spin_lock_init(&card
->ipm_lock
);
442 spin_lock_init(&card
->mask_lock
);
443 #ifdef CONFIG_IP_MULTICAST
444 INIT_LIST_HEAD(&card
->ipm_list
);
446 INIT_LIST_HEAD(&card
->lancmd_waiters
);
450 lcs_clear_multicast_list(struct lcs_card
*card
)
452 #ifdef CONFIG_IP_MULTICAST
453 struct lcs_ipm_list
*ipm
;
456 /* Free multicast list. */
457 LCS_DBF_TEXT(3, setup
, "clmclist");
458 spin_lock_irqsave(&card
->ipm_lock
, flags
);
459 while (!list_empty(&card
->ipm_list
)){
460 ipm
= list_entry(card
->ipm_list
.next
,
461 struct lcs_ipm_list
, list
);
462 list_del(&ipm
->list
);
463 if (ipm
->ipm_state
!= LCS_IPM_STATE_SET_REQUIRED
){
464 spin_unlock_irqrestore(&card
->ipm_lock
, flags
);
465 lcs_send_delipm(card
, ipm
);
466 spin_lock_irqsave(&card
->ipm_lock
, flags
);
470 spin_unlock_irqrestore(&card
->ipm_lock
, flags
);
474 * Cleanup channels,card and state machines.
477 lcs_cleanup_card(struct lcs_card
*card
)
480 LCS_DBF_TEXT(3, setup
, "cleancrd");
481 LCS_DBF_HEX(2,setup
,&card
,sizeof(void*));
483 if (card
->dev
!= NULL
)
484 free_netdev(card
->dev
);
485 /* Cleanup channels. */
486 lcs_cleanup_channel(&card
->write
);
487 lcs_cleanup_channel(&card
->read
);
494 lcs_start_channel(struct lcs_channel
*channel
)
499 LCS_DBF_TEXT_(4, trace
,"ssch%s", dev_name(&channel
->ccwdev
->dev
));
500 spin_lock_irqsave(get_ccwdev_lock(channel
->ccwdev
), flags
);
501 rc
= ccw_device_start(channel
->ccwdev
,
502 channel
->ccws
+ channel
->io_idx
, 0, 0,
503 DOIO_DENY_PREFETCH
| DOIO_ALLOW_SUSPEND
);
505 channel
->state
= LCS_CH_STATE_RUNNING
;
506 spin_unlock_irqrestore(get_ccwdev_lock(channel
->ccwdev
), flags
);
508 LCS_DBF_TEXT_(4,trace
,"essh%s",
509 dev_name(&channel
->ccwdev
->dev
));
510 dev_err(&channel
->ccwdev
->dev
,
511 "Starting an LCS device resulted in an error,"
518 lcs_clear_channel(struct lcs_channel
*channel
)
523 LCS_DBF_TEXT(4,trace
,"clearch");
524 LCS_DBF_TEXT_(4, trace
, "%s", dev_name(&channel
->ccwdev
->dev
));
525 spin_lock_irqsave(get_ccwdev_lock(channel
->ccwdev
), flags
);
526 rc
= ccw_device_clear(channel
->ccwdev
, (addr_t
) channel
);
527 spin_unlock_irqrestore(get_ccwdev_lock(channel
->ccwdev
), flags
);
529 LCS_DBF_TEXT_(4, trace
, "ecsc%s",
530 dev_name(&channel
->ccwdev
->dev
));
533 wait_event(channel
->wait_q
, (channel
->state
== LCS_CH_STATE_CLEARED
));
534 channel
->state
= LCS_CH_STATE_STOPPED
;
543 lcs_stop_channel(struct lcs_channel
*channel
)
548 if (channel
->state
== LCS_CH_STATE_STOPPED
)
550 LCS_DBF_TEXT(4,trace
,"haltsch");
551 LCS_DBF_TEXT_(4, trace
, "%s", dev_name(&channel
->ccwdev
->dev
));
552 channel
->state
= LCS_CH_STATE_INIT
;
553 spin_lock_irqsave(get_ccwdev_lock(channel
->ccwdev
), flags
);
554 rc
= ccw_device_halt(channel
->ccwdev
, (addr_t
) channel
);
555 spin_unlock_irqrestore(get_ccwdev_lock(channel
->ccwdev
), flags
);
557 LCS_DBF_TEXT_(4, trace
, "ehsc%s",
558 dev_name(&channel
->ccwdev
->dev
));
561 /* Asynchronous halt initialted. Wait for its completion. */
562 wait_event(channel
->wait_q
, (channel
->state
== LCS_CH_STATE_HALTED
));
563 lcs_clear_channel(channel
);
568 * start read and write channel
571 lcs_start_channels(struct lcs_card
*card
)
575 LCS_DBF_TEXT(2, trace
, "chstart");
576 /* start read channel */
577 rc
= lcs_start_channel(&card
->read
);
580 /* start write channel */
581 rc
= lcs_start_channel(&card
->write
);
583 lcs_stop_channel(&card
->read
);
588 * stop read and write channel
591 lcs_stop_channels(struct lcs_card
*card
)
593 LCS_DBF_TEXT(2, trace
, "chhalt");
594 lcs_stop_channel(&card
->read
);
595 lcs_stop_channel(&card
->write
);
602 static struct lcs_buffer
*
603 __lcs_get_buffer(struct lcs_channel
*channel
)
607 LCS_DBF_TEXT(5, trace
, "_getbuff");
608 index
= channel
->io_idx
;
610 if (channel
->iob
[index
].state
== LCS_BUF_STATE_EMPTY
) {
611 channel
->iob
[index
].state
= LCS_BUF_STATE_LOCKED
;
612 return channel
->iob
+ index
;
614 index
= (index
+ 1) & (LCS_NUM_BUFFS
- 1);
615 } while (index
!= channel
->io_idx
);
619 static struct lcs_buffer
*
620 lcs_get_buffer(struct lcs_channel
*channel
)
622 struct lcs_buffer
*buffer
;
625 LCS_DBF_TEXT(5, trace
, "getbuff");
626 spin_lock_irqsave(get_ccwdev_lock(channel
->ccwdev
), flags
);
627 buffer
= __lcs_get_buffer(channel
);
628 spin_unlock_irqrestore(get_ccwdev_lock(channel
->ccwdev
), flags
);
633 * Resume channel program if the channel is suspended.
636 __lcs_resume_channel(struct lcs_channel
*channel
)
640 if (channel
->state
!= LCS_CH_STATE_SUSPENDED
)
642 if (channel
->ccws
[channel
->io_idx
].flags
& CCW_FLAG_SUSPEND
)
644 LCS_DBF_TEXT_(5, trace
, "rsch%s", dev_name(&channel
->ccwdev
->dev
));
645 rc
= ccw_device_resume(channel
->ccwdev
);
647 LCS_DBF_TEXT_(4, trace
, "ersc%s",
648 dev_name(&channel
->ccwdev
->dev
));
649 dev_err(&channel
->ccwdev
->dev
,
650 "Sending data from the LCS device to the LAN failed"
653 channel
->state
= LCS_CH_STATE_RUNNING
;
659 * Make a buffer ready for processing.
662 __lcs_ready_buffer_bits(struct lcs_channel
*channel
, int index
)
666 LCS_DBF_TEXT(5, trace
, "rdybits");
667 prev
= (index
- 1) & (LCS_NUM_BUFFS
- 1);
668 next
= (index
+ 1) & (LCS_NUM_BUFFS
- 1);
669 /* Check if we may clear the suspend bit of this buffer. */
670 if (channel
->ccws
[next
].flags
& CCW_FLAG_SUSPEND
) {
671 /* Check if we have to set the PCI bit. */
672 if (!(channel
->ccws
[prev
].flags
& CCW_FLAG_SUSPEND
))
673 /* Suspend bit of the previous buffer is not set. */
674 channel
->ccws
[index
].flags
|= CCW_FLAG_PCI
;
675 /* Suspend bit of the next buffer is set. */
676 channel
->ccws
[index
].flags
&= ~CCW_FLAG_SUSPEND
;
681 lcs_ready_buffer(struct lcs_channel
*channel
, struct lcs_buffer
*buffer
)
686 LCS_DBF_TEXT(5, trace
, "rdybuff");
687 BUG_ON(buffer
->state
!= LCS_BUF_STATE_LOCKED
&&
688 buffer
->state
!= LCS_BUF_STATE_PROCESSED
);
689 spin_lock_irqsave(get_ccwdev_lock(channel
->ccwdev
), flags
);
690 buffer
->state
= LCS_BUF_STATE_READY
;
691 index
= buffer
- channel
->iob
;
693 channel
->ccws
[index
].count
= buffer
->count
;
694 /* Check relevant PCI/suspend bits. */
695 __lcs_ready_buffer_bits(channel
, index
);
696 rc
= __lcs_resume_channel(channel
);
697 spin_unlock_irqrestore(get_ccwdev_lock(channel
->ccwdev
), flags
);
702 * Mark the buffer as processed. Take care of the suspend bit
703 * of the previous buffer. This function is called from
704 * interrupt context, so the lock must not be taken.
707 __lcs_processed_buffer(struct lcs_channel
*channel
, struct lcs_buffer
*buffer
)
709 int index
, prev
, next
;
711 LCS_DBF_TEXT(5, trace
, "prcsbuff");
712 BUG_ON(buffer
->state
!= LCS_BUF_STATE_READY
);
713 buffer
->state
= LCS_BUF_STATE_PROCESSED
;
714 index
= buffer
- channel
->iob
;
715 prev
= (index
- 1) & (LCS_NUM_BUFFS
- 1);
716 next
= (index
+ 1) & (LCS_NUM_BUFFS
- 1);
717 /* Set the suspend bit and clear the PCI bit of this buffer. */
718 channel
->ccws
[index
].flags
|= CCW_FLAG_SUSPEND
;
719 channel
->ccws
[index
].flags
&= ~CCW_FLAG_PCI
;
720 /* Check the suspend bit of the previous buffer. */
721 if (channel
->iob
[prev
].state
== LCS_BUF_STATE_READY
) {
723 * Previous buffer is in state ready. It might have
724 * happened in lcs_ready_buffer that the suspend bit
725 * has not been cleared to avoid an endless loop.
728 __lcs_ready_buffer_bits(channel
, prev
);
730 /* Clear PCI bit of next buffer. */
731 channel
->ccws
[next
].flags
&= ~CCW_FLAG_PCI
;
732 return __lcs_resume_channel(channel
);
736 * Put a processed buffer back to state empty.
739 lcs_release_buffer(struct lcs_channel
*channel
, struct lcs_buffer
*buffer
)
743 LCS_DBF_TEXT(5, trace
, "relbuff");
744 BUG_ON(buffer
->state
!= LCS_BUF_STATE_LOCKED
&&
745 buffer
->state
!= LCS_BUF_STATE_PROCESSED
);
746 spin_lock_irqsave(get_ccwdev_lock(channel
->ccwdev
), flags
);
747 buffer
->state
= LCS_BUF_STATE_EMPTY
;
748 spin_unlock_irqrestore(get_ccwdev_lock(channel
->ccwdev
), flags
);
752 * Get buffer for a lan command.
754 static struct lcs_buffer
*
755 lcs_get_lancmd(struct lcs_card
*card
, int count
)
757 struct lcs_buffer
*buffer
;
760 LCS_DBF_TEXT(4, trace
, "getlncmd");
761 /* Get buffer and wait if none is available. */
762 wait_event(card
->write
.wait_q
,
763 ((buffer
= lcs_get_buffer(&card
->write
)) != NULL
));
764 count
+= sizeof(struct lcs_header
);
765 *(__u16
*)(buffer
->data
+ count
) = 0;
766 buffer
->count
= count
+ sizeof(__u16
);
767 buffer
->callback
= lcs_release_buffer
;
768 cmd
= (struct lcs_cmd
*) buffer
->data
;
770 cmd
->type
= LCS_FRAME_TYPE_CONTROL
;
777 lcs_get_reply(struct lcs_reply
*reply
)
779 WARN_ON(atomic_read(&reply
->refcnt
) <= 0);
780 atomic_inc(&reply
->refcnt
);
784 lcs_put_reply(struct lcs_reply
*reply
)
786 WARN_ON(atomic_read(&reply
->refcnt
) <= 0);
787 if (atomic_dec_and_test(&reply
->refcnt
)) {
793 static struct lcs_reply
*
794 lcs_alloc_reply(struct lcs_cmd
*cmd
)
796 struct lcs_reply
*reply
;
798 LCS_DBF_TEXT(4, trace
, "getreply");
800 reply
= kzalloc(sizeof(struct lcs_reply
), GFP_ATOMIC
);
803 atomic_set(&reply
->refcnt
,1);
804 reply
->sequence_no
= cmd
->sequence_no
;
807 init_waitqueue_head(&reply
->wait_q
);
813 * Notifier function for lancmd replies. Called from read irq.
816 lcs_notify_lancmd_waiters(struct lcs_card
*card
, struct lcs_cmd
*cmd
)
818 struct list_head
*l
, *n
;
819 struct lcs_reply
*reply
;
821 LCS_DBF_TEXT(4, trace
, "notiwait");
822 spin_lock(&card
->lock
);
823 list_for_each_safe(l
, n
, &card
->lancmd_waiters
) {
824 reply
= list_entry(l
, struct lcs_reply
, list
);
825 if (reply
->sequence_no
== cmd
->sequence_no
) {
826 lcs_get_reply(reply
);
827 list_del_init(&reply
->list
);
828 if (reply
->callback
!= NULL
)
829 reply
->callback(card
, cmd
);
831 reply
->rc
= cmd
->return_code
;
832 wake_up(&reply
->wait_q
);
833 lcs_put_reply(reply
);
837 spin_unlock(&card
->lock
);
841 * Emit buffer of a lan command.
844 lcs_lancmd_timeout(unsigned long data
)
846 struct lcs_reply
*reply
, *list_reply
, *r
;
849 LCS_DBF_TEXT(4, trace
, "timeout");
850 reply
= (struct lcs_reply
*) data
;
851 spin_lock_irqsave(&reply
->card
->lock
, flags
);
852 list_for_each_entry_safe(list_reply
, r
,
853 &reply
->card
->lancmd_waiters
,list
) {
854 if (reply
== list_reply
) {
855 lcs_get_reply(reply
);
856 list_del_init(&reply
->list
);
857 spin_unlock_irqrestore(&reply
->card
->lock
, flags
);
860 wake_up(&reply
->wait_q
);
861 lcs_put_reply(reply
);
865 spin_unlock_irqrestore(&reply
->card
->lock
, flags
);
869 lcs_send_lancmd(struct lcs_card
*card
, struct lcs_buffer
*buffer
,
870 void (*reply_callback
)(struct lcs_card
*, struct lcs_cmd
*))
872 struct lcs_reply
*reply
;
874 struct timer_list timer
;
878 LCS_DBF_TEXT(4, trace
, "sendcmd");
879 cmd
= (struct lcs_cmd
*) buffer
->data
;
880 cmd
->return_code
= 0;
881 cmd
->sequence_no
= card
->sequence_no
++;
882 reply
= lcs_alloc_reply(cmd
);
885 reply
->callback
= reply_callback
;
887 spin_lock_irqsave(&card
->lock
, flags
);
888 list_add_tail(&reply
->list
, &card
->lancmd_waiters
);
889 spin_unlock_irqrestore(&card
->lock
, flags
);
891 buffer
->callback
= lcs_release_buffer
;
892 rc
= lcs_ready_buffer(&card
->write
, buffer
);
895 init_timer_on_stack(&timer
);
896 timer
.function
= lcs_lancmd_timeout
;
897 timer
.data
= (unsigned long) reply
;
898 timer
.expires
= jiffies
+ HZ
*card
->lancmd_timeout
;
900 wait_event(reply
->wait_q
, reply
->received
);
901 del_timer_sync(&timer
);
902 destroy_timer_on_stack(&timer
);
903 LCS_DBF_TEXT_(4, trace
, "rc:%d",reply
->rc
);
905 lcs_put_reply(reply
);
906 return rc
? -EIO
: 0;
910 * LCS startup command
913 lcs_send_startup(struct lcs_card
*card
, __u8 initiator
)
915 struct lcs_buffer
*buffer
;
918 LCS_DBF_TEXT(2, trace
, "startup");
919 buffer
= lcs_get_lancmd(card
, LCS_STD_CMD_SIZE
);
920 cmd
= (struct lcs_cmd
*) buffer
->data
;
921 cmd
->cmd_code
= LCS_CMD_STARTUP
;
922 cmd
->initiator
= initiator
;
923 cmd
->cmd
.lcs_startup
.buff_size
= LCS_IOBUFFERSIZE
;
924 return lcs_send_lancmd(card
, buffer
, NULL
);
928 * LCS shutdown command
931 lcs_send_shutdown(struct lcs_card
*card
)
933 struct lcs_buffer
*buffer
;
936 LCS_DBF_TEXT(2, trace
, "shutdown");
937 buffer
= lcs_get_lancmd(card
, LCS_STD_CMD_SIZE
);
938 cmd
= (struct lcs_cmd
*) buffer
->data
;
939 cmd
->cmd_code
= LCS_CMD_SHUTDOWN
;
940 cmd
->initiator
= LCS_INITIATOR_TCPIP
;
941 return lcs_send_lancmd(card
, buffer
, NULL
);
945 * LCS lanstat command
948 __lcs_lanstat_cb(struct lcs_card
*card
, struct lcs_cmd
*cmd
)
950 LCS_DBF_TEXT(2, trace
, "statcb");
951 memcpy(card
->mac
, cmd
->cmd
.lcs_lanstat_cmd
.mac_addr
, LCS_MAC_LENGTH
);
955 lcs_send_lanstat(struct lcs_card
*card
)
957 struct lcs_buffer
*buffer
;
960 LCS_DBF_TEXT(2,trace
, "cmdstat");
961 buffer
= lcs_get_lancmd(card
, LCS_STD_CMD_SIZE
);
962 cmd
= (struct lcs_cmd
*) buffer
->data
;
963 /* Setup lanstat command. */
964 cmd
->cmd_code
= LCS_CMD_LANSTAT
;
965 cmd
->initiator
= LCS_INITIATOR_TCPIP
;
966 cmd
->cmd
.lcs_std_cmd
.lan_type
= card
->lan_type
;
967 cmd
->cmd
.lcs_std_cmd
.portno
= card
->portno
;
968 return lcs_send_lancmd(card
, buffer
, __lcs_lanstat_cb
);
972 * send stoplan command
975 lcs_send_stoplan(struct lcs_card
*card
, __u8 initiator
)
977 struct lcs_buffer
*buffer
;
980 LCS_DBF_TEXT(2, trace
, "cmdstpln");
981 buffer
= lcs_get_lancmd(card
, LCS_STD_CMD_SIZE
);
982 cmd
= (struct lcs_cmd
*) buffer
->data
;
983 cmd
->cmd_code
= LCS_CMD_STOPLAN
;
984 cmd
->initiator
= initiator
;
985 cmd
->cmd
.lcs_std_cmd
.lan_type
= card
->lan_type
;
986 cmd
->cmd
.lcs_std_cmd
.portno
= card
->portno
;
987 return lcs_send_lancmd(card
, buffer
, NULL
);
991 * send startlan command
994 __lcs_send_startlan_cb(struct lcs_card
*card
, struct lcs_cmd
*cmd
)
996 LCS_DBF_TEXT(2, trace
, "srtlancb");
997 card
->lan_type
= cmd
->cmd
.lcs_std_cmd
.lan_type
;
998 card
->portno
= cmd
->cmd
.lcs_std_cmd
.portno
;
1002 lcs_send_startlan(struct lcs_card
*card
, __u8 initiator
)
1004 struct lcs_buffer
*buffer
;
1005 struct lcs_cmd
*cmd
;
1007 LCS_DBF_TEXT(2, trace
, "cmdstaln");
1008 buffer
= lcs_get_lancmd(card
, LCS_STD_CMD_SIZE
);
1009 cmd
= (struct lcs_cmd
*) buffer
->data
;
1010 cmd
->cmd_code
= LCS_CMD_STARTLAN
;
1011 cmd
->initiator
= initiator
;
1012 cmd
->cmd
.lcs_std_cmd
.lan_type
= card
->lan_type
;
1013 cmd
->cmd
.lcs_std_cmd
.portno
= card
->portno
;
1014 return lcs_send_lancmd(card
, buffer
, __lcs_send_startlan_cb
);
1017 #ifdef CONFIG_IP_MULTICAST
1019 * send setipm command (Multicast)
1022 lcs_send_setipm(struct lcs_card
*card
,struct lcs_ipm_list
*ipm_list
)
1024 struct lcs_buffer
*buffer
;
1025 struct lcs_cmd
*cmd
;
1027 LCS_DBF_TEXT(2, trace
, "cmdsetim");
1028 buffer
= lcs_get_lancmd(card
, LCS_MULTICAST_CMD_SIZE
);
1029 cmd
= (struct lcs_cmd
*) buffer
->data
;
1030 cmd
->cmd_code
= LCS_CMD_SETIPM
;
1031 cmd
->initiator
= LCS_INITIATOR_TCPIP
;
1032 cmd
->cmd
.lcs_qipassist
.lan_type
= card
->lan_type
;
1033 cmd
->cmd
.lcs_qipassist
.portno
= card
->portno
;
1034 cmd
->cmd
.lcs_qipassist
.version
= 4;
1035 cmd
->cmd
.lcs_qipassist
.num_ip_pairs
= 1;
1036 memcpy(cmd
->cmd
.lcs_qipassist
.lcs_ipass_ctlmsg
.ip_mac_pair
,
1037 &ipm_list
->ipm
, sizeof (struct lcs_ip_mac_pair
));
1038 LCS_DBF_TEXT_(2, trace
, "%x",ipm_list
->ipm
.ip_addr
);
1039 return lcs_send_lancmd(card
, buffer
, NULL
);
1043 * send delipm command (Multicast)
1046 lcs_send_delipm(struct lcs_card
*card
,struct lcs_ipm_list
*ipm_list
)
1048 struct lcs_buffer
*buffer
;
1049 struct lcs_cmd
*cmd
;
1051 LCS_DBF_TEXT(2, trace
, "cmddelim");
1052 buffer
= lcs_get_lancmd(card
, LCS_MULTICAST_CMD_SIZE
);
1053 cmd
= (struct lcs_cmd
*) buffer
->data
;
1054 cmd
->cmd_code
= LCS_CMD_DELIPM
;
1055 cmd
->initiator
= LCS_INITIATOR_TCPIP
;
1056 cmd
->cmd
.lcs_qipassist
.lan_type
= card
->lan_type
;
1057 cmd
->cmd
.lcs_qipassist
.portno
= card
->portno
;
1058 cmd
->cmd
.lcs_qipassist
.version
= 4;
1059 cmd
->cmd
.lcs_qipassist
.num_ip_pairs
= 1;
1060 memcpy(cmd
->cmd
.lcs_qipassist
.lcs_ipass_ctlmsg
.ip_mac_pair
,
1061 &ipm_list
->ipm
, sizeof (struct lcs_ip_mac_pair
));
1062 LCS_DBF_TEXT_(2, trace
, "%x",ipm_list
->ipm
.ip_addr
);
1063 return lcs_send_lancmd(card
, buffer
, NULL
);
1067 * check if multicast is supported by LCS
1070 __lcs_check_multicast_cb(struct lcs_card
*card
, struct lcs_cmd
*cmd
)
1072 LCS_DBF_TEXT(2, trace
, "chkmccb");
1073 card
->ip_assists_supported
=
1074 cmd
->cmd
.lcs_qipassist
.ip_assists_supported
;
1075 card
->ip_assists_enabled
=
1076 cmd
->cmd
.lcs_qipassist
.ip_assists_enabled
;
1080 lcs_check_multicast_support(struct lcs_card
*card
)
1082 struct lcs_buffer
*buffer
;
1083 struct lcs_cmd
*cmd
;
1086 LCS_DBF_TEXT(2, trace
, "cmdqipa");
1087 /* Send query ipassist. */
1088 buffer
= lcs_get_lancmd(card
, LCS_STD_CMD_SIZE
);
1089 cmd
= (struct lcs_cmd
*) buffer
->data
;
1090 cmd
->cmd_code
= LCS_CMD_QIPASSIST
;
1091 cmd
->initiator
= LCS_INITIATOR_TCPIP
;
1092 cmd
->cmd
.lcs_qipassist
.lan_type
= card
->lan_type
;
1093 cmd
->cmd
.lcs_qipassist
.portno
= card
->portno
;
1094 cmd
->cmd
.lcs_qipassist
.version
= 4;
1095 cmd
->cmd
.lcs_qipassist
.num_ip_pairs
= 1;
1096 rc
= lcs_send_lancmd(card
, buffer
, __lcs_check_multicast_cb
);
1098 pr_err("Query IPAssist failed. Assuming unsupported!\n");
1101 if (card
->ip_assists_supported
& LCS_IPASS_MULTICAST_SUPPORT
)
1107 * set or del multicast address on LCS card
1110 lcs_fix_multicast_list(struct lcs_card
*card
)
1112 struct list_head failed_list
;
1113 struct lcs_ipm_list
*ipm
, *tmp
;
1114 unsigned long flags
;
1117 LCS_DBF_TEXT(4,trace
, "fixipm");
1118 INIT_LIST_HEAD(&failed_list
);
1119 spin_lock_irqsave(&card
->ipm_lock
, flags
);
1121 list_for_each_entry_safe(ipm
, tmp
, &card
->ipm_list
, list
){
1122 switch (ipm
->ipm_state
) {
1123 case LCS_IPM_STATE_SET_REQUIRED
:
1124 /* del from ipm_list so no one else can tamper with
1126 list_del_init(&ipm
->list
);
1127 spin_unlock_irqrestore(&card
->ipm_lock
, flags
);
1128 rc
= lcs_send_setipm(card
, ipm
);
1129 spin_lock_irqsave(&card
->ipm_lock
, flags
);
1131 pr_info("Adding multicast address failed."
1132 " Table possibly full!\n");
1133 /* store ipm in failed list -> will be added
1134 * to ipm_list again, so a retry will be done
1135 * during the next call of this function */
1136 list_add_tail(&ipm
->list
, &failed_list
);
1138 ipm
->ipm_state
= LCS_IPM_STATE_ON_CARD
;
1139 /* re-insert into ipm_list */
1140 list_add_tail(&ipm
->list
, &card
->ipm_list
);
1143 case LCS_IPM_STATE_DEL_REQUIRED
:
1144 list_del(&ipm
->list
);
1145 spin_unlock_irqrestore(&card
->ipm_lock
, flags
);
1146 lcs_send_delipm(card
, ipm
);
1147 spin_lock_irqsave(&card
->ipm_lock
, flags
);
1150 case LCS_IPM_STATE_ON_CARD
:
1154 /* re-insert all entries from the failed_list into ipm_list */
1155 list_for_each_entry_safe(ipm
, tmp
, &failed_list
, list
)
1156 list_move_tail(&ipm
->list
, &card
->ipm_list
);
1158 spin_unlock_irqrestore(&card
->ipm_lock
, flags
);
1162 * get mac address for the relevant Multicast address
1165 lcs_get_mac_for_ipm(__be32 ipm
, char *mac
, struct net_device
*dev
)
1167 LCS_DBF_TEXT(4,trace
, "getmac");
1168 ip_eth_mc_map(ipm
, mac
);
1172 * function called by net device to handle multicast address relevant things
1175 lcs_remove_mc_addresses(struct lcs_card
*card
, struct in_device
*in4_dev
)
1177 struct ip_mc_list
*im4
;
1178 struct list_head
*l
;
1179 struct lcs_ipm_list
*ipm
;
1180 unsigned long flags
;
1181 char buf
[MAX_ADDR_LEN
];
1183 LCS_DBF_TEXT(4, trace
, "remmclst");
1184 spin_lock_irqsave(&card
->ipm_lock
, flags
);
1185 list_for_each(l
, &card
->ipm_list
) {
1186 ipm
= list_entry(l
, struct lcs_ipm_list
, list
);
1187 for (im4
= rcu_dereference(in4_dev
->mc_list
);
1188 im4
!= NULL
; im4
= rcu_dereference(im4
->next_rcu
)) {
1189 lcs_get_mac_for_ipm(im4
->multiaddr
, buf
, card
->dev
);
1190 if ( (ipm
->ipm
.ip_addr
== im4
->multiaddr
) &&
1191 (memcmp(buf
, &ipm
->ipm
.mac_addr
,
1192 LCS_MAC_LENGTH
) == 0) )
1196 ipm
->ipm_state
= LCS_IPM_STATE_DEL_REQUIRED
;
1198 spin_unlock_irqrestore(&card
->ipm_lock
, flags
);
1201 static inline struct lcs_ipm_list
*
1202 lcs_check_addr_entry(struct lcs_card
*card
, struct ip_mc_list
*im4
, char *buf
)
1204 struct lcs_ipm_list
*tmp
, *ipm
= NULL
;
1205 struct list_head
*l
;
1206 unsigned long flags
;
1208 LCS_DBF_TEXT(4, trace
, "chkmcent");
1209 spin_lock_irqsave(&card
->ipm_lock
, flags
);
1210 list_for_each(l
, &card
->ipm_list
) {
1211 tmp
= list_entry(l
, struct lcs_ipm_list
, list
);
1212 if ( (tmp
->ipm
.ip_addr
== im4
->multiaddr
) &&
1213 (memcmp(buf
, &tmp
->ipm
.mac_addr
,
1214 LCS_MAC_LENGTH
) == 0) ) {
1219 spin_unlock_irqrestore(&card
->ipm_lock
, flags
);
1224 lcs_set_mc_addresses(struct lcs_card
*card
, struct in_device
*in4_dev
)
1227 struct ip_mc_list
*im4
;
1228 struct lcs_ipm_list
*ipm
;
1229 char buf
[MAX_ADDR_LEN
];
1230 unsigned long flags
;
1232 LCS_DBF_TEXT(4, trace
, "setmclst");
1233 for (im4
= rcu_dereference(in4_dev
->mc_list
); im4
!= NULL
;
1234 im4
= rcu_dereference(im4
->next_rcu
)) {
1235 lcs_get_mac_for_ipm(im4
->multiaddr
, buf
, card
->dev
);
1236 ipm
= lcs_check_addr_entry(card
, im4
, buf
);
1238 continue; /* Address already in list. */
1239 ipm
= kzalloc(sizeof(struct lcs_ipm_list
), GFP_ATOMIC
);
1241 pr_info("Not enough memory to add"
1242 " new multicast entry!\n");
1245 memcpy(&ipm
->ipm
.mac_addr
, buf
, LCS_MAC_LENGTH
);
1246 ipm
->ipm
.ip_addr
= im4
->multiaddr
;
1247 ipm
->ipm_state
= LCS_IPM_STATE_SET_REQUIRED
;
1248 spin_lock_irqsave(&card
->ipm_lock
, flags
);
1249 LCS_DBF_HEX(2,trace
,&ipm
->ipm
.ip_addr
,4);
1250 list_add(&ipm
->list
, &card
->ipm_list
);
1251 spin_unlock_irqrestore(&card
->ipm_lock
, flags
);
1256 lcs_register_mc_addresses(void *data
)
1258 struct lcs_card
*card
;
1259 struct in_device
*in4_dev
;
1261 card
= (struct lcs_card
*) data
;
1263 if (!lcs_do_run_thread(card
, LCS_SET_MC_THREAD
))
1265 LCS_DBF_TEXT(4, trace
, "regmulti");
1267 in4_dev
= in_dev_get(card
->dev
);
1268 if (in4_dev
== NULL
)
1271 lcs_remove_mc_addresses(card
,in4_dev
);
1272 lcs_set_mc_addresses(card
, in4_dev
);
1274 in_dev_put(in4_dev
);
1276 netif_carrier_off(card
->dev
);
1277 netif_tx_disable(card
->dev
);
1278 wait_event(card
->write
.wait_q
,
1279 (card
->write
.state
!= LCS_CH_STATE_RUNNING
));
1280 lcs_fix_multicast_list(card
);
1281 if (card
->state
== DEV_STATE_UP
) {
1282 netif_carrier_on(card
->dev
);
1283 netif_wake_queue(card
->dev
);
1286 lcs_clear_thread_running_bit(card
, LCS_SET_MC_THREAD
);
1289 #endif /* CONFIG_IP_MULTICAST */
1292 * function called by net device to
1293 * handle multicast address relevant things
1296 lcs_set_multicast_list(struct net_device
*dev
)
1298 #ifdef CONFIG_IP_MULTICAST
1299 struct lcs_card
*card
;
1301 LCS_DBF_TEXT(4, trace
, "setmulti");
1302 card
= (struct lcs_card
*) dev
->ml_priv
;
1304 if (!lcs_set_thread_start_bit(card
, LCS_SET_MC_THREAD
))
1305 schedule_work(&card
->kernel_thread_starter
);
1306 #endif /* CONFIG_IP_MULTICAST */
1310 lcs_check_irb_error(struct ccw_device
*cdev
, struct irb
*irb
)
1315 switch (PTR_ERR(irb
)) {
1317 dev_warn(&cdev
->dev
,
1318 "An I/O-error occurred on the LCS device\n");
1319 LCS_DBF_TEXT(2, trace
, "ckirberr");
1320 LCS_DBF_TEXT_(2, trace
, " rc%d", -EIO
);
1323 dev_warn(&cdev
->dev
,
1324 "A command timed out on the LCS device\n");
1325 LCS_DBF_TEXT(2, trace
, "ckirberr");
1326 LCS_DBF_TEXT_(2, trace
, " rc%d", -ETIMEDOUT
);
1329 dev_warn(&cdev
->dev
,
1330 "An error occurred on the LCS device, rc=%ld\n",
1332 LCS_DBF_TEXT(2, trace
, "ckirberr");
1333 LCS_DBF_TEXT(2, trace
, " rc???");
1335 return PTR_ERR(irb
);
1339 lcs_get_problem(struct ccw_device
*cdev
, struct irb
*irb
)
1344 sense
= (char *) irb
->ecw
;
1345 cstat
= irb
->scsw
.cmd
.cstat
;
1346 dstat
= irb
->scsw
.cmd
.dstat
;
1348 if (cstat
& (SCHN_STAT_CHN_CTRL_CHK
| SCHN_STAT_INTF_CTRL_CHK
|
1349 SCHN_STAT_CHN_DATA_CHK
| SCHN_STAT_CHAIN_CHECK
|
1350 SCHN_STAT_PROT_CHECK
| SCHN_STAT_PROG_CHECK
)) {
1351 LCS_DBF_TEXT(2, trace
, "CGENCHK");
1354 if (dstat
& DEV_STAT_UNIT_CHECK
) {
1355 if (sense
[LCS_SENSE_BYTE_1
] &
1356 LCS_SENSE_RESETTING_EVENT
) {
1357 LCS_DBF_TEXT(2, trace
, "REVIND");
1360 if (sense
[LCS_SENSE_BYTE_0
] &
1361 LCS_SENSE_CMD_REJECT
) {
1362 LCS_DBF_TEXT(2, trace
, "CMDREJ");
1365 if ((!sense
[LCS_SENSE_BYTE_0
]) &&
1366 (!sense
[LCS_SENSE_BYTE_1
]) &&
1367 (!sense
[LCS_SENSE_BYTE_2
]) &&
1368 (!sense
[LCS_SENSE_BYTE_3
])) {
1369 LCS_DBF_TEXT(2, trace
, "ZEROSEN");
1372 LCS_DBF_TEXT(2, trace
, "DGENCHK");
1379 lcs_schedule_recovery(struct lcs_card
*card
)
1381 LCS_DBF_TEXT(2, trace
, "startrec");
1382 if (!lcs_set_thread_start_bit(card
, LCS_RECOVERY_THREAD
))
1383 schedule_work(&card
->kernel_thread_starter
);
1387 * IRQ Handler for LCS channels
1390 lcs_irq(struct ccw_device
*cdev
, unsigned long intparm
, struct irb
*irb
)
1392 struct lcs_card
*card
;
1393 struct lcs_channel
*channel
;
1397 if (lcs_check_irb_error(cdev
, irb
))
1400 card
= CARD_FROM_DEV(cdev
);
1401 if (card
->read
.ccwdev
== cdev
)
1402 channel
= &card
->read
;
1404 channel
= &card
->write
;
1406 cstat
= irb
->scsw
.cmd
.cstat
;
1407 dstat
= irb
->scsw
.cmd
.dstat
;
1408 LCS_DBF_TEXT_(5, trace
, "Rint%s", dev_name(&cdev
->dev
));
1409 LCS_DBF_TEXT_(5, trace
, "%4x%4x", irb
->scsw
.cmd
.cstat
,
1410 irb
->scsw
.cmd
.dstat
);
1411 LCS_DBF_TEXT_(5, trace
, "%4x%4x", irb
->scsw
.cmd
.fctl
,
1412 irb
->scsw
.cmd
.actl
);
1414 /* Check for channel and device errors presented */
1415 rc
= lcs_get_problem(cdev
, irb
);
1416 if (rc
|| (dstat
& DEV_STAT_UNIT_EXCEP
)) {
1417 dev_warn(&cdev
->dev
,
1418 "The LCS device stopped because of an error,"
1419 " dstat=0x%X, cstat=0x%X \n",
1422 channel
->state
= LCS_CH_STATE_ERROR
;
1425 if (channel
->state
== LCS_CH_STATE_ERROR
) {
1426 lcs_schedule_recovery(card
);
1427 wake_up(&card
->wait_q
);
1430 /* How far in the ccw chain have we processed? */
1431 if ((channel
->state
!= LCS_CH_STATE_INIT
) &&
1432 (irb
->scsw
.cmd
.fctl
& SCSW_FCTL_START_FUNC
) &&
1433 (irb
->scsw
.cmd
.cpa
!= 0)) {
1434 index
= (struct ccw1
*) __va((addr_t
) irb
->scsw
.cmd
.cpa
)
1436 if ((irb
->scsw
.cmd
.actl
& SCSW_ACTL_SUSPENDED
) ||
1437 (irb
->scsw
.cmd
.cstat
& SCHN_STAT_PCI
))
1438 /* Bloody io subsystem tells us lies about cpa... */
1439 index
= (index
- 1) & (LCS_NUM_BUFFS
- 1);
1440 while (channel
->io_idx
!= index
) {
1441 __lcs_processed_buffer(channel
,
1442 channel
->iob
+ channel
->io_idx
);
1444 (channel
->io_idx
+ 1) & (LCS_NUM_BUFFS
- 1);
1448 if ((irb
->scsw
.cmd
.dstat
& DEV_STAT_DEV_END
) ||
1449 (irb
->scsw
.cmd
.dstat
& DEV_STAT_CHN_END
) ||
1450 (irb
->scsw
.cmd
.dstat
& DEV_STAT_UNIT_CHECK
))
1451 /* Mark channel as stopped. */
1452 channel
->state
= LCS_CH_STATE_STOPPED
;
1453 else if (irb
->scsw
.cmd
.actl
& SCSW_ACTL_SUSPENDED
)
1454 /* CCW execution stopped on a suspend bit. */
1455 channel
->state
= LCS_CH_STATE_SUSPENDED
;
1456 if (irb
->scsw
.cmd
.fctl
& SCSW_FCTL_HALT_FUNC
) {
1457 if (irb
->scsw
.cmd
.cc
!= 0) {
1458 ccw_device_halt(channel
->ccwdev
, (addr_t
) channel
);
1461 /* The channel has been stopped by halt_IO. */
1462 channel
->state
= LCS_CH_STATE_HALTED
;
1464 if (irb
->scsw
.cmd
.fctl
& SCSW_FCTL_CLEAR_FUNC
)
1465 channel
->state
= LCS_CH_STATE_CLEARED
;
1466 /* Do the rest in the tasklet. */
1467 tasklet_schedule(&channel
->irq_tasklet
);
1471 * Tasklet for IRQ handler
1474 lcs_tasklet(unsigned long data
)
1476 unsigned long flags
;
1477 struct lcs_channel
*channel
;
1478 struct lcs_buffer
*iob
;
1481 channel
= (struct lcs_channel
*) data
;
1482 LCS_DBF_TEXT_(5, trace
, "tlet%s", dev_name(&channel
->ccwdev
->dev
));
1484 /* Check for processed buffers. */
1486 buf_idx
= channel
->buf_idx
;
1487 while (iob
[buf_idx
].state
== LCS_BUF_STATE_PROCESSED
) {
1488 /* Do the callback thing. */
1489 if (iob
[buf_idx
].callback
!= NULL
)
1490 iob
[buf_idx
].callback(channel
, iob
+ buf_idx
);
1491 buf_idx
= (buf_idx
+ 1) & (LCS_NUM_BUFFS
- 1);
1493 channel
->buf_idx
= buf_idx
;
1495 if (channel
->state
== LCS_CH_STATE_STOPPED
)
1496 lcs_start_channel(channel
);
1497 spin_lock_irqsave(get_ccwdev_lock(channel
->ccwdev
), flags
);
1498 if (channel
->state
== LCS_CH_STATE_SUSPENDED
&&
1499 channel
->iob
[channel
->io_idx
].state
== LCS_BUF_STATE_READY
)
1500 __lcs_resume_channel(channel
);
1501 spin_unlock_irqrestore(get_ccwdev_lock(channel
->ccwdev
), flags
);
1503 /* Something happened on the channel. Wake up waiters. */
1504 wake_up(&channel
->wait_q
);
1508 * Finish current tx buffer and make it ready for transmit.
1511 __lcs_emit_txbuffer(struct lcs_card
*card
)
1513 LCS_DBF_TEXT(5, trace
, "emittx");
1514 *(__u16
*)(card
->tx_buffer
->data
+ card
->tx_buffer
->count
) = 0;
1515 card
->tx_buffer
->count
+= 2;
1516 lcs_ready_buffer(&card
->write
, card
->tx_buffer
);
1517 card
->tx_buffer
= NULL
;
1522 * Callback for finished tx buffers.
1525 lcs_txbuffer_cb(struct lcs_channel
*channel
, struct lcs_buffer
*buffer
)
1527 struct lcs_card
*card
;
1529 LCS_DBF_TEXT(5, trace
, "txbuffcb");
1530 /* Put buffer back to pool. */
1531 lcs_release_buffer(channel
, buffer
);
1532 card
= container_of(channel
, struct lcs_card
, write
);
1533 if (netif_queue_stopped(card
->dev
) && netif_carrier_ok(card
->dev
))
1534 netif_wake_queue(card
->dev
);
1535 spin_lock(&card
->lock
);
1537 if (card
->tx_emitted
<= 0 && card
->tx_buffer
!= NULL
)
1539 * Last running tx buffer has finished. Submit partially
1540 * filled current buffer.
1542 __lcs_emit_txbuffer(card
);
1543 spin_unlock(&card
->lock
);
1547 * Packet transmit function called by network stack
1550 __lcs_start_xmit(struct lcs_card
*card
, struct sk_buff
*skb
,
1551 struct net_device
*dev
)
1553 struct lcs_header
*header
;
1554 int rc
= NETDEV_TX_OK
;
1556 LCS_DBF_TEXT(5, trace
, "hardxmit");
1558 card
->stats
.tx_dropped
++;
1559 card
->stats
.tx_errors
++;
1560 return NETDEV_TX_OK
;
1562 if (card
->state
!= DEV_STATE_UP
) {
1564 card
->stats
.tx_dropped
++;
1565 card
->stats
.tx_errors
++;
1566 card
->stats
.tx_carrier_errors
++;
1567 return NETDEV_TX_OK
;
1569 if (skb
->protocol
== htons(ETH_P_IPV6
)) {
1571 return NETDEV_TX_OK
;
1573 netif_stop_queue(card
->dev
);
1574 spin_lock(&card
->lock
);
1575 if (card
->tx_buffer
!= NULL
&&
1576 card
->tx_buffer
->count
+ sizeof(struct lcs_header
) +
1577 skb
->len
+ sizeof(u16
) > LCS_IOBUFFERSIZE
)
1578 /* skb too big for current tx buffer. */
1579 __lcs_emit_txbuffer(card
);
1580 if (card
->tx_buffer
== NULL
) {
1581 /* Get new tx buffer */
1582 card
->tx_buffer
= lcs_get_buffer(&card
->write
);
1583 if (card
->tx_buffer
== NULL
) {
1584 card
->stats
.tx_dropped
++;
1585 rc
= NETDEV_TX_BUSY
;
1588 card
->tx_buffer
->callback
= lcs_txbuffer_cb
;
1589 card
->tx_buffer
->count
= 0;
1591 header
= (struct lcs_header
*)
1592 (card
->tx_buffer
->data
+ card
->tx_buffer
->count
);
1593 card
->tx_buffer
->count
+= skb
->len
+ sizeof(struct lcs_header
);
1594 header
->offset
= card
->tx_buffer
->count
;
1595 header
->type
= card
->lan_type
;
1596 header
->slot
= card
->portno
;
1597 skb_copy_from_linear_data(skb
, header
+ 1, skb
->len
);
1598 spin_unlock(&card
->lock
);
1599 card
->stats
.tx_bytes
+= skb
->len
;
1600 card
->stats
.tx_packets
++;
1602 netif_wake_queue(card
->dev
);
1603 spin_lock(&card
->lock
);
1604 if (card
->tx_emitted
<= 0 && card
->tx_buffer
!= NULL
)
1605 /* If this is the first tx buffer emit it immediately. */
1606 __lcs_emit_txbuffer(card
);
1608 spin_unlock(&card
->lock
);
1613 lcs_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
1615 struct lcs_card
*card
;
1618 LCS_DBF_TEXT(5, trace
, "pktxmit");
1619 card
= (struct lcs_card
*) dev
->ml_priv
;
1620 rc
= __lcs_start_xmit(card
, skb
, dev
);
1625 * send startlan and lanstat command to make LCS device ready
1628 lcs_startlan_auto(struct lcs_card
*card
)
1632 LCS_DBF_TEXT(2, trace
, "strtauto");
1633 #ifdef CONFIG_ETHERNET
1634 card
->lan_type
= LCS_FRAME_TYPE_ENET
;
1635 rc
= lcs_send_startlan(card
, LCS_INITIATOR_TCPIP
);
1641 card
->lan_type
= LCS_FRAME_TYPE_FDDI
;
1642 rc
= lcs_send_startlan(card
, LCS_INITIATOR_TCPIP
);
1650 lcs_startlan(struct lcs_card
*card
)
1654 LCS_DBF_TEXT(2, trace
, "startlan");
1656 if (card
->portno
!= LCS_INVALID_PORT_NO
) {
1657 if (card
->lan_type
== LCS_FRAME_TYPE_AUTO
)
1658 rc
= lcs_startlan_auto(card
);
1660 rc
= lcs_send_startlan(card
, LCS_INITIATOR_TCPIP
);
1662 for (i
= 0; i
<= 16; i
++) {
1664 if (card
->lan_type
!= LCS_FRAME_TYPE_AUTO
)
1665 rc
= lcs_send_startlan(card
,
1666 LCS_INITIATOR_TCPIP
);
1668 /* autodetecting lan type */
1669 rc
= lcs_startlan_auto(card
);
1675 return lcs_send_lanstat(card
);
1680 * LCS detect function
1681 * setup channels and make them I/O ready
1684 lcs_detect(struct lcs_card
*card
)
1688 LCS_DBF_TEXT(2, setup
, "lcsdetct");
1689 /* start/reset card */
1691 netif_stop_queue(card
->dev
);
1692 rc
= lcs_stop_channels(card
);
1694 rc
= lcs_start_channels(card
);
1696 rc
= lcs_send_startup(card
, LCS_INITIATOR_TCPIP
);
1698 rc
= lcs_startlan(card
);
1702 card
->state
= DEV_STATE_UP
;
1704 card
->state
= DEV_STATE_DOWN
;
1705 card
->write
.state
= LCS_CH_STATE_INIT
;
1706 card
->read
.state
= LCS_CH_STATE_INIT
;
1715 lcs_stopcard(struct lcs_card
*card
)
1719 LCS_DBF_TEXT(3, setup
, "stopcard");
1721 if (card
->read
.state
!= LCS_CH_STATE_STOPPED
&&
1722 card
->write
.state
!= LCS_CH_STATE_STOPPED
&&
1723 card
->read
.state
!= LCS_CH_STATE_ERROR
&&
1724 card
->write
.state
!= LCS_CH_STATE_ERROR
&&
1725 card
->state
== DEV_STATE_UP
) {
1726 lcs_clear_multicast_list(card
);
1727 rc
= lcs_send_stoplan(card
,LCS_INITIATOR_TCPIP
);
1728 rc
= lcs_send_shutdown(card
);
1730 rc
= lcs_stop_channels(card
);
1731 card
->state
= DEV_STATE_DOWN
;
1737 * Kernel Thread helper functions for LGW initiated commands
1740 lcs_start_kernel_thread(struct work_struct
*work
)
1742 struct lcs_card
*card
= container_of(work
, struct lcs_card
, kernel_thread_starter
);
1743 LCS_DBF_TEXT(5, trace
, "krnthrd");
1744 if (lcs_do_start_thread(card
, LCS_RECOVERY_THREAD
))
1745 kthread_run(lcs_recovery
, card
, "lcs_recover");
1746 #ifdef CONFIG_IP_MULTICAST
1747 if (lcs_do_start_thread(card
, LCS_SET_MC_THREAD
))
1748 kthread_run(lcs_register_mc_addresses
, card
, "regipm");
1753 * Process control frames.
1756 lcs_get_control(struct lcs_card
*card
, struct lcs_cmd
*cmd
)
1758 LCS_DBF_TEXT(5, trace
, "getctrl");
1759 if (cmd
->initiator
== LCS_INITIATOR_LGW
) {
1760 switch(cmd
->cmd_code
) {
1761 case LCS_CMD_STARTUP
:
1762 case LCS_CMD_STARTLAN
:
1763 lcs_schedule_recovery(card
);
1765 case LCS_CMD_STOPLAN
:
1766 pr_warning("Stoplan for %s initiated by LGW.\n",
1769 netif_carrier_off(card
->dev
);
1772 LCS_DBF_TEXT(5, trace
, "noLGWcmd");
1776 lcs_notify_lancmd_waiters(card
, cmd
);
1780 * Unpack network packet.
1783 lcs_get_skb(struct lcs_card
*card
, char *skb_data
, unsigned int skb_len
)
1785 struct sk_buff
*skb
;
1787 LCS_DBF_TEXT(5, trace
, "getskb");
1788 if (card
->dev
== NULL
||
1789 card
->state
!= DEV_STATE_UP
)
1790 /* The card isn't up. Ignore the packet. */
1793 skb
= dev_alloc_skb(skb_len
);
1795 dev_err(&card
->dev
->dev
,
1796 " Allocating a socket buffer to interface %s failed\n",
1798 card
->stats
.rx_dropped
++;
1801 memcpy(skb_put(skb
, skb_len
), skb_data
, skb_len
);
1802 skb
->protocol
= card
->lan_type_trans(skb
, card
->dev
);
1803 card
->stats
.rx_bytes
+= skb_len
;
1804 card
->stats
.rx_packets
++;
1805 if (skb
->protocol
== htons(ETH_P_802_2
))
1806 *((__u32
*)skb
->cb
) = ++card
->pkt_seq
;
1811 * LCS main routine to get packets and lancmd replies from the buffers
1814 lcs_get_frames_cb(struct lcs_channel
*channel
, struct lcs_buffer
*buffer
)
1816 struct lcs_card
*card
;
1817 struct lcs_header
*lcs_hdr
;
1820 LCS_DBF_TEXT(5, trace
, "lcsgtpkt");
1821 lcs_hdr
= (struct lcs_header
*) buffer
->data
;
1822 if (lcs_hdr
->offset
== LCS_ILLEGAL_OFFSET
) {
1823 LCS_DBF_TEXT(4, trace
, "-eiogpkt");
1826 card
= container_of(channel
, struct lcs_card
, read
);
1828 while (lcs_hdr
->offset
!= 0) {
1829 if (lcs_hdr
->offset
<= 0 ||
1830 lcs_hdr
->offset
> LCS_IOBUFFERSIZE
||
1831 lcs_hdr
->offset
< offset
) {
1832 /* Offset invalid. */
1833 card
->stats
.rx_length_errors
++;
1834 card
->stats
.rx_errors
++;
1837 /* What kind of frame is it? */
1838 if (lcs_hdr
->type
== LCS_FRAME_TYPE_CONTROL
)
1839 /* Control frame. */
1840 lcs_get_control(card
, (struct lcs_cmd
*) lcs_hdr
);
1841 else if (lcs_hdr
->type
== LCS_FRAME_TYPE_ENET
||
1842 lcs_hdr
->type
== LCS_FRAME_TYPE_TR
||
1843 lcs_hdr
->type
== LCS_FRAME_TYPE_FDDI
)
1844 /* Normal network packet. */
1845 lcs_get_skb(card
, (char *)(lcs_hdr
+ 1),
1846 lcs_hdr
->offset
- offset
-
1847 sizeof(struct lcs_header
));
1849 /* Unknown frame type. */
1850 ; // FIXME: error message ?
1851 /* Proceed to next frame. */
1852 offset
= lcs_hdr
->offset
;
1853 lcs_hdr
->offset
= LCS_ILLEGAL_OFFSET
;
1854 lcs_hdr
= (struct lcs_header
*) (buffer
->data
+ offset
);
1856 /* The buffer is now empty. Make it ready again. */
1857 lcs_ready_buffer(&card
->read
, buffer
);
1861 * get network statistics for ifconfig and other user programs
1863 static struct net_device_stats
*
1864 lcs_getstats(struct net_device
*dev
)
1866 struct lcs_card
*card
;
1868 LCS_DBF_TEXT(4, trace
, "netstats");
1869 card
= (struct lcs_card
*) dev
->ml_priv
;
1870 return &card
->stats
;
1875 * This function will be called by user doing ifconfig xxx down
1878 lcs_stop_device(struct net_device
*dev
)
1880 struct lcs_card
*card
;
1883 LCS_DBF_TEXT(2, trace
, "stopdev");
1884 card
= (struct lcs_card
*) dev
->ml_priv
;
1885 netif_carrier_off(dev
);
1886 netif_tx_disable(dev
);
1887 dev
->flags
&= ~IFF_UP
;
1888 wait_event(card
->write
.wait_q
,
1889 (card
->write
.state
!= LCS_CH_STATE_RUNNING
));
1890 rc
= lcs_stopcard(card
);
1892 dev_err(&card
->dev
->dev
,
1893 " Shutting down the LCS device failed\n ");
1898 * start lcs device and make it runnable
1899 * This function will be called by user doing ifconfig xxx up
1902 lcs_open_device(struct net_device
*dev
)
1904 struct lcs_card
*card
;
1907 LCS_DBF_TEXT(2, trace
, "opendev");
1908 card
= (struct lcs_card
*) dev
->ml_priv
;
1909 /* initialize statistics */
1910 rc
= lcs_detect(card
);
1912 pr_err("Error in opening device!\n");
1915 dev
->flags
|= IFF_UP
;
1916 netif_carrier_on(dev
);
1917 netif_wake_queue(dev
);
1918 card
->state
= DEV_STATE_UP
;
1924 * show function for portno called by cat or similar things
1927 lcs_portno_show (struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1929 struct lcs_card
*card
;
1931 card
= dev_get_drvdata(dev
);
1936 return sprintf(buf
, "%d\n", card
->portno
);
1940 * store the value which is piped to file portno
1943 lcs_portno_store (struct device
*dev
, struct device_attribute
*attr
, const char *buf
, size_t count
)
1945 struct lcs_card
*card
;
1948 card
= dev_get_drvdata(dev
);
1953 rc
= sscanf(buf
, "%d", &value
);
1956 /* TODO: sanity checks */
1957 card
->portno
= value
;
1963 static DEVICE_ATTR(portno
, 0644, lcs_portno_show
, lcs_portno_store
);
1965 static const char *lcs_type
[] = {
1970 "unknown channel type",
1971 "unsupported channel type",
1975 lcs_type_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1977 struct ccwgroup_device
*cgdev
;
1979 cgdev
= to_ccwgroupdev(dev
);
1983 return sprintf(buf
, "%s\n", lcs_type
[cgdev
->cdev
[0]->id
.driver_info
]);
1986 static DEVICE_ATTR(type
, 0444, lcs_type_show
, NULL
);
1989 lcs_timeout_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1991 struct lcs_card
*card
;
1993 card
= dev_get_drvdata(dev
);
1995 return card
? sprintf(buf
, "%u\n", card
->lancmd_timeout
) : 0;
1999 lcs_timeout_store (struct device
*dev
, struct device_attribute
*attr
, const char *buf
, size_t count
)
2001 struct lcs_card
*card
;
2005 card
= dev_get_drvdata(dev
);
2010 rc
= sscanf(buf
, "%u", &value
);
2013 /* TODO: sanity checks */
2014 card
->lancmd_timeout
= value
;
2020 static DEVICE_ATTR(lancmd_timeout
, 0644, lcs_timeout_show
, lcs_timeout_store
);
2023 lcs_dev_recover_store(struct device
*dev
, struct device_attribute
*attr
,
2024 const char *buf
, size_t count
)
2026 struct lcs_card
*card
= dev_get_drvdata(dev
);
2032 if (card
->state
!= DEV_STATE_UP
)
2034 i
= simple_strtoul(buf
, &tmp
, 16);
2036 lcs_schedule_recovery(card
);
2040 static DEVICE_ATTR(recover
, 0200, NULL
, lcs_dev_recover_store
);
2042 static struct attribute
* lcs_attrs
[] = {
2043 &dev_attr_portno
.attr
,
2044 &dev_attr_type
.attr
,
2045 &dev_attr_lancmd_timeout
.attr
,
2046 &dev_attr_recover
.attr
,
2049 static struct attribute_group lcs_attr_group
= {
2052 static const struct attribute_group
*lcs_attr_groups
[] = {
2056 static const struct device_type lcs_devtype
= {
2058 .groups
= lcs_attr_groups
,
2062 * lcs_probe_device is called on establishing a new ccwgroup_device.
2065 lcs_probe_device(struct ccwgroup_device
*ccwgdev
)
2067 struct lcs_card
*card
;
2069 if (!get_device(&ccwgdev
->dev
))
2072 LCS_DBF_TEXT(2, setup
, "add_dev");
2073 card
= lcs_alloc_card();
2075 LCS_DBF_TEXT_(2, setup
, " rc%d", -ENOMEM
);
2076 put_device(&ccwgdev
->dev
);
2079 dev_set_drvdata(&ccwgdev
->dev
, card
);
2080 ccwgdev
->cdev
[0]->handler
= lcs_irq
;
2081 ccwgdev
->cdev
[1]->handler
= lcs_irq
;
2082 card
->gdev
= ccwgdev
;
2083 INIT_WORK(&card
->kernel_thread_starter
, lcs_start_kernel_thread
);
2084 card
->thread_start_mask
= 0;
2085 card
->thread_allowed_mask
= 0;
2086 card
->thread_running_mask
= 0;
2087 ccwgdev
->dev
.type
= &lcs_devtype
;
2093 lcs_register_netdev(struct ccwgroup_device
*ccwgdev
)
2095 struct lcs_card
*card
;
2097 LCS_DBF_TEXT(2, setup
, "regnetdv");
2098 card
= dev_get_drvdata(&ccwgdev
->dev
);
2099 if (card
->dev
->reg_state
!= NETREG_UNINITIALIZED
)
2101 SET_NETDEV_DEV(card
->dev
, &ccwgdev
->dev
);
2102 return register_netdev(card
->dev
);
2106 * lcs_new_device will be called by setting the group device online.
2108 static const struct net_device_ops lcs_netdev_ops
= {
2109 .ndo_open
= lcs_open_device
,
2110 .ndo_stop
= lcs_stop_device
,
2111 .ndo_get_stats
= lcs_getstats
,
2112 .ndo_start_xmit
= lcs_start_xmit
,
2115 static const struct net_device_ops lcs_mc_netdev_ops
= {
2116 .ndo_open
= lcs_open_device
,
2117 .ndo_stop
= lcs_stop_device
,
2118 .ndo_get_stats
= lcs_getstats
,
2119 .ndo_start_xmit
= lcs_start_xmit
,
2120 .ndo_set_rx_mode
= lcs_set_multicast_list
,
2124 lcs_new_device(struct ccwgroup_device
*ccwgdev
)
2126 struct lcs_card
*card
;
2127 struct net_device
*dev
=NULL
;
2128 enum lcs_dev_states recover_state
;
2131 card
= dev_get_drvdata(&ccwgdev
->dev
);
2135 LCS_DBF_TEXT(2, setup
, "newdev");
2136 LCS_DBF_HEX(3, setup
, &card
, sizeof(void*));
2137 card
->read
.ccwdev
= ccwgdev
->cdev
[0];
2138 card
->write
.ccwdev
= ccwgdev
->cdev
[1];
2140 recover_state
= card
->state
;
2141 rc
= ccw_device_set_online(card
->read
.ccwdev
);
2144 rc
= ccw_device_set_online(card
->write
.ccwdev
);
2148 LCS_DBF_TEXT(3, setup
, "lcsnewdv");
2150 lcs_setup_card(card
);
2151 rc
= lcs_detect(card
);
2153 LCS_DBF_TEXT(2, setup
, "dtctfail");
2154 dev_err(&card
->dev
->dev
,
2155 "Detecting a network adapter for LCS devices"
2156 " failed with rc=%d (0x%x)\n", rc
, rc
);
2161 LCS_DBF_TEXT(2, setup
, "samedev");
2162 LCS_DBF_HEX(3, setup
, &card
, sizeof(void*));
2165 switch (card
->lan_type
) {
2166 #ifdef CONFIG_ETHERNET
2167 case LCS_FRAME_TYPE_ENET
:
2168 card
->lan_type_trans
= eth_type_trans
;
2169 dev
= alloc_etherdev(0);
2173 case LCS_FRAME_TYPE_FDDI
:
2174 card
->lan_type_trans
= fddi_type_trans
;
2175 dev
= alloc_fddidev(0);
2179 LCS_DBF_TEXT(3, setup
, "errinit");
2180 pr_err(" Initialization failed\n");
2186 card
->dev
->ml_priv
= card
;
2187 card
->dev
->netdev_ops
= &lcs_netdev_ops
;
2188 memcpy(card
->dev
->dev_addr
, card
->mac
, LCS_MAC_LENGTH
);
2189 #ifdef CONFIG_IP_MULTICAST
2190 if (!lcs_check_multicast_support(card
))
2191 card
->dev
->netdev_ops
= &lcs_mc_netdev_ops
;
2194 lcs_set_allowed_threads(card
,0xffffffff);
2195 if (recover_state
== DEV_STATE_RECOVER
) {
2196 lcs_set_multicast_list(card
->dev
);
2197 card
->dev
->flags
|= IFF_UP
;
2198 netif_carrier_on(card
->dev
);
2199 netif_wake_queue(card
->dev
);
2200 card
->state
= DEV_STATE_UP
;
2205 if (lcs_register_netdev(ccwgdev
) != 0)
2208 /* Print out supported assists: IPv6 */
2209 pr_info("LCS device %s %s IPv6 support\n", card
->dev
->name
,
2210 (card
->ip_assists_supported
& LCS_IPASS_IPV6_SUPPORT
) ?
2211 "with" : "without");
2212 /* Print out supported assist: Multicast */
2213 pr_info("LCS device %s %s Multicast support\n", card
->dev
->name
,
2214 (card
->ip_assists_supported
& LCS_IPASS_MULTICAST_SUPPORT
) ?
2215 "with" : "without");
2219 ccw_device_set_offline(card
->write
.ccwdev
);
2221 ccw_device_set_offline(card
->read
.ccwdev
);
2227 * lcs_shutdown_device, called when setting the group device offline.
2230 __lcs_shutdown_device(struct ccwgroup_device
*ccwgdev
, int recovery_mode
)
2232 struct lcs_card
*card
;
2233 enum lcs_dev_states recover_state
;
2234 int ret
= 0, ret2
= 0, ret3
= 0;
2236 LCS_DBF_TEXT(3, setup
, "shtdndev");
2237 card
= dev_get_drvdata(&ccwgdev
->dev
);
2240 if (recovery_mode
== 0) {
2241 lcs_set_allowed_threads(card
, 0);
2242 if (lcs_wait_for_threads(card
, LCS_SET_MC_THREAD
))
2243 return -ERESTARTSYS
;
2245 LCS_DBF_HEX(3, setup
, &card
, sizeof(void*));
2246 recover_state
= card
->state
;
2248 ret
= lcs_stop_device(card
->dev
);
2249 ret2
= ccw_device_set_offline(card
->read
.ccwdev
);
2250 ret3
= ccw_device_set_offline(card
->write
.ccwdev
);
2252 ret
= (ret2
) ? ret2
: ret3
;
2254 LCS_DBF_TEXT_(3, setup
, "1err:%d", ret
);
2255 if (recover_state
== DEV_STATE_UP
) {
2256 card
->state
= DEV_STATE_RECOVER
;
2262 lcs_shutdown_device(struct ccwgroup_device
*ccwgdev
)
2264 return __lcs_shutdown_device(ccwgdev
, 0);
2268 * drive lcs recovery after startup and startlan initiated by Lan Gateway
2271 lcs_recovery(void *ptr
)
2273 struct lcs_card
*card
;
2274 struct ccwgroup_device
*gdev
;
2277 card
= (struct lcs_card
*) ptr
;
2279 LCS_DBF_TEXT(4, trace
, "recover1");
2280 if (!lcs_do_run_thread(card
, LCS_RECOVERY_THREAD
))
2282 LCS_DBF_TEXT(4, trace
, "recover2");
2284 dev_warn(&gdev
->dev
,
2285 "A recovery process has been started for the LCS device\n");
2286 rc
= __lcs_shutdown_device(gdev
, 1);
2287 rc
= lcs_new_device(gdev
);
2289 pr_info("Device %s successfully recovered!\n",
2292 pr_info("Device %s could not be recovered!\n",
2294 lcs_clear_thread_running_bit(card
, LCS_RECOVERY_THREAD
);
2299 * lcs_remove_device, free buffers and card
2302 lcs_remove_device(struct ccwgroup_device
*ccwgdev
)
2304 struct lcs_card
*card
;
2306 card
= dev_get_drvdata(&ccwgdev
->dev
);
2310 LCS_DBF_TEXT(3, setup
, "remdev");
2311 LCS_DBF_HEX(3, setup
, &card
, sizeof(void*));
2312 if (ccwgdev
->state
== CCWGROUP_ONLINE
) {
2313 lcs_shutdown_device(ccwgdev
);
2316 unregister_netdev(card
->dev
);
2317 lcs_cleanup_card(card
);
2318 lcs_free_card(card
);
2319 dev_set_drvdata(&ccwgdev
->dev
, NULL
);
2320 put_device(&ccwgdev
->dev
);
2323 static int lcs_pm_suspend(struct lcs_card
*card
)
2326 netif_device_detach(card
->dev
);
2327 lcs_set_allowed_threads(card
, 0);
2328 lcs_wait_for_threads(card
, 0xffffffff);
2329 if (card
->state
!= DEV_STATE_DOWN
)
2330 __lcs_shutdown_device(card
->gdev
, 1);
2334 static int lcs_pm_resume(struct lcs_card
*card
)
2338 if (card
->state
== DEV_STATE_RECOVER
)
2339 rc
= lcs_new_device(card
->gdev
);
2341 netif_device_attach(card
->dev
);
2343 dev_warn(&card
->gdev
->dev
, "The lcs device driver "
2344 "failed to recover the device\n");
2349 static int lcs_prepare(struct ccwgroup_device
*gdev
)
2354 static void lcs_complete(struct ccwgroup_device
*gdev
)
2359 static int lcs_freeze(struct ccwgroup_device
*gdev
)
2361 struct lcs_card
*card
= dev_get_drvdata(&gdev
->dev
);
2362 return lcs_pm_suspend(card
);
2365 static int lcs_thaw(struct ccwgroup_device
*gdev
)
2367 struct lcs_card
*card
= dev_get_drvdata(&gdev
->dev
);
2368 return lcs_pm_resume(card
);
2371 static int lcs_restore(struct ccwgroup_device
*gdev
)
2373 struct lcs_card
*card
= dev_get_drvdata(&gdev
->dev
);
2374 return lcs_pm_resume(card
);
2377 static struct ccw_device_id lcs_ids
[] = {
2378 {CCW_DEVICE(0x3088, 0x08), .driver_info
= lcs_channel_type_parallel
},
2379 {CCW_DEVICE(0x3088, 0x1f), .driver_info
= lcs_channel_type_2216
},
2380 {CCW_DEVICE(0x3088, 0x60), .driver_info
= lcs_channel_type_osa2
},
2383 MODULE_DEVICE_TABLE(ccw
, lcs_ids
);
2385 static struct ccw_driver lcs_ccw_driver
= {
2387 .owner
= THIS_MODULE
,
2391 .probe
= ccwgroup_probe_ccwdev
,
2392 .remove
= ccwgroup_remove_ccwdev
,
2393 .int_class
= IRQIO_LCS
,
2397 * LCS ccwgroup driver registration
2399 static struct ccwgroup_driver lcs_group_driver
= {
2401 .owner
= THIS_MODULE
,
2404 .setup
= lcs_probe_device
,
2405 .remove
= lcs_remove_device
,
2406 .set_online
= lcs_new_device
,
2407 .set_offline
= lcs_shutdown_device
,
2408 .prepare
= lcs_prepare
,
2409 .complete
= lcs_complete
,
2410 .freeze
= lcs_freeze
,
2412 .restore
= lcs_restore
,
2415 static ssize_t
lcs_driver_group_store(struct device_driver
*ddrv
,
2416 const char *buf
, size_t count
)
2419 err
= ccwgroup_create_dev(lcs_root_dev
, &lcs_group_driver
, 2, buf
);
2420 return err
? err
: count
;
2422 static DRIVER_ATTR(group
, 0200, NULL
, lcs_driver_group_store
);
2424 static struct attribute
*lcs_drv_attrs
[] = {
2425 &driver_attr_group
.attr
,
2428 static struct attribute_group lcs_drv_attr_group
= {
2429 .attrs
= lcs_drv_attrs
,
2431 static const struct attribute_group
*lcs_drv_attr_groups
[] = {
2432 &lcs_drv_attr_group
,
2437 * LCS Module/Kernel initialization function
2440 __init
lcs_init_module(void)
2444 pr_info("Loading %s\n", version
);
2445 rc
= lcs_register_debug_facility();
2446 LCS_DBF_TEXT(0, setup
, "lcsinit");
2449 lcs_root_dev
= root_device_register("lcs");
2450 rc
= PTR_ERR_OR_ZERO(lcs_root_dev
);
2453 rc
= ccw_driver_register(&lcs_ccw_driver
);
2456 lcs_group_driver
.driver
.groups
= lcs_drv_attr_groups
;
2457 rc
= ccwgroup_driver_register(&lcs_group_driver
);
2463 ccw_driver_unregister(&lcs_ccw_driver
);
2465 root_device_unregister(lcs_root_dev
);
2467 lcs_unregister_debug_facility();
2469 pr_err("Initializing the lcs device driver failed\n");
2475 * LCS module cleanup function
2478 __exit
lcs_cleanup_module(void)
2480 pr_info("Terminating lcs module.\n");
2481 LCS_DBF_TEXT(0, trace
, "cleanup");
2482 ccwgroup_driver_unregister(&lcs_group_driver
);
2483 ccw_driver_unregister(&lcs_ccw_driver
);
2484 root_device_unregister(lcs_root_dev
);
2485 lcs_unregister_debug_facility();
2488 module_init(lcs_init_module
);
2489 module_exit(lcs_cleanup_module
);
2491 MODULE_AUTHOR("Frank Pavlic <fpavlic@de.ibm.com>");
2492 MODULE_LICENSE("GPL");