2 * drivers/s390/net/ctcm_fsms.c
4 * Copyright IBM Corp. 2001, 2007
5 * Authors: Fritz Elfert (felfert@millenux.com)
6 * Peter Tiedemann (ptiedem@de.ibm.com)
8 * Belinda Thompson (belindat@us.ibm.com)
9 * Andy Richter (richtera@us.ibm.com)
16 #define KMSG_COMPONENT "ctcm"
17 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/kernel.h>
22 #include <linux/slab.h>
23 #include <linux/errno.h>
24 #include <linux/types.h>
25 #include <linux/interrupt.h>
26 #include <linux/timer.h>
27 #include <linux/bitops.h>
29 #include <linux/signal.h>
30 #include <linux/string.h>
33 #include <linux/if_arp.h>
34 #include <linux/tcp.h>
35 #include <linux/skbuff.h>
36 #include <linux/ctype.h>
40 #include <asm/ccwdev.h>
41 #include <asm/ccwgroup.h>
42 #include <linux/uaccess.h>
44 #include <asm/idals.h>
48 #include "ctcm_dbug.h"
49 #include "ctcm_main.h"
50 #include "ctcm_fsms.h"
52 const char *dev_state_names[] = {
53 [DEV_STATE_STOPPED] = "Stopped",
54 [DEV_STATE_STARTWAIT_RXTX] = "StartWait RXTX",
55 [DEV_STATE_STARTWAIT_RX] = "StartWait RX",
56 [DEV_STATE_STARTWAIT_TX] = "StartWait TX",
57 [DEV_STATE_STOPWAIT_RXTX] = "StopWait RXTX",
58 [DEV_STATE_STOPWAIT_RX] = "StopWait RX",
59 [DEV_STATE_STOPWAIT_TX] = "StopWait TX",
60 [DEV_STATE_RUNNING] = "Running",
63 const char *dev_event_names[] = {
64 [DEV_EVENT_START] = "Start",
65 [DEV_EVENT_STOP] = "Stop",
66 [DEV_EVENT_RXUP] = "RX up",
67 [DEV_EVENT_TXUP] = "TX up",
68 [DEV_EVENT_RXDOWN] = "RX down",
69 [DEV_EVENT_TXDOWN] = "TX down",
70 [DEV_EVENT_RESTART] = "Restart",
73 const char *ctc_ch_event_names[] = {
74 [CTC_EVENT_IO_SUCCESS] = "ccw_device success",
75 [CTC_EVENT_IO_EBUSY] = "ccw_device busy",
76 [CTC_EVENT_IO_ENODEV] = "ccw_device enodev",
77 [CTC_EVENT_IO_UNKNOWN] = "ccw_device unknown",
78 [CTC_EVENT_ATTNBUSY] = "Status ATTN & BUSY",
79 [CTC_EVENT_ATTN] = "Status ATTN",
80 [CTC_EVENT_BUSY] = "Status BUSY",
81 [CTC_EVENT_UC_RCRESET] = "Unit check remote reset",
82 [CTC_EVENT_UC_RSRESET] = "Unit check remote system reset",
83 [CTC_EVENT_UC_TXTIMEOUT] = "Unit check TX timeout",
84 [CTC_EVENT_UC_TXPARITY] = "Unit check TX parity",
85 [CTC_EVENT_UC_HWFAIL] = "Unit check Hardware failure",
86 [CTC_EVENT_UC_RXPARITY] = "Unit check RX parity",
87 [CTC_EVENT_UC_ZERO] = "Unit check ZERO",
88 [CTC_EVENT_UC_UNKNOWN] = "Unit check Unknown",
89 [CTC_EVENT_SC_UNKNOWN] = "SubChannel check Unknown",
90 [CTC_EVENT_MC_FAIL] = "Machine check failure",
91 [CTC_EVENT_MC_GOOD] = "Machine check operational",
92 [CTC_EVENT_IRQ] = "IRQ normal",
93 [CTC_EVENT_FINSTAT] = "IRQ final",
94 [CTC_EVENT_TIMER] = "Timer",
95 [CTC_EVENT_START] = "Start",
96 [CTC_EVENT_STOP] = "Stop",
98 * additional MPC events
100 [CTC_EVENT_SEND_XID] = "XID Exchange",
101 [CTC_EVENT_RSWEEP_TIMER] = "MPC Group Sweep Timer",
104 const char *ctc_ch_state_names[] = {
105 [CTC_STATE_IDLE] = "Idle",
106 [CTC_STATE_STOPPED] = "Stopped",
107 [CTC_STATE_STARTWAIT] = "StartWait",
108 [CTC_STATE_STARTRETRY] = "StartRetry",
109 [CTC_STATE_SETUPWAIT] = "SetupWait",
110 [CTC_STATE_RXINIT] = "RX init",
111 [CTC_STATE_TXINIT] = "TX init",
112 [CTC_STATE_RX] = "RX",
113 [CTC_STATE_TX] = "TX",
114 [CTC_STATE_RXIDLE] = "RX idle",
115 [CTC_STATE_TXIDLE] = "TX idle",
116 [CTC_STATE_RXERR] = "RX error",
117 [CTC_STATE_TXERR] = "TX error",
118 [CTC_STATE_TERM] = "Terminating",
119 [CTC_STATE_DTERM] = "Restarting",
120 [CTC_STATE_NOTOP] = "Not operational",
122 * additional MPC states
124 [CH_XID0_PENDING] = "Pending XID0 Start",
125 [CH_XID0_INPROGRESS] = "In XID0 Negotiations ",
126 [CH_XID7_PENDING] = "Pending XID7 P1 Start",
127 [CH_XID7_PENDING1] = "Active XID7 P1 Exchange ",
128 [CH_XID7_PENDING2] = "Pending XID7 P2 Start ",
129 [CH_XID7_PENDING3] = "Active XID7 P2 Exchange ",
130 [CH_XID7_PENDING4] = "XID7 Complete - Pending READY ",
133 static void ctcm_action_nop(fsm_instance *fi, int event, void *arg);
136 * ----- static ctcm actions for channel statemachine -----
139 static void chx_txdone(fsm_instance *fi, int event, void *arg);
140 static void chx_rx(fsm_instance *fi, int event, void *arg);
141 static void chx_rxidle(fsm_instance *fi, int event, void *arg);
142 static void chx_firstio(fsm_instance *fi, int event, void *arg);
143 static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg);
144 static void ctcm_chx_start(fsm_instance *fi, int event, void *arg);
145 static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg);
146 static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg);
147 static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg);
148 static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg);
149 static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg);
150 static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg);
151 static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg);
152 static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg);
153 static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg);
154 static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg);
155 static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg);
156 static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg);
159 * ----- static ctcmpc actions for ctcmpc channel statemachine -----
162 static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg);
163 static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg);
164 static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg);
166 static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg);
167 static void ctcm_chx_start(fsm_instance *fi, int event, void *arg);
168 static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg);
169 static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg);
170 static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg);
171 static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg);
172 static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg);
173 static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg);
174 static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg);
175 static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg);
176 static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg);
177 static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg);
178 static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg);
179 static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg);
181 static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg);
182 static void ctcmpc_chx_attnbusy(fsm_instance *, int, void *);
183 static void ctcmpc_chx_resend(fsm_instance *, int, void *);
184 static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg);
187 * Check return code of a preceding ccw_device call, halt_IO etc...
189 * ch : The channel, the error belongs to.
190 * Returns the error code (!= 0) to inspect.
192 void ctcm_ccw_check_rc(struct channel *ch, int rc, char *msg)
194 CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR,
195 "%s(%s): %s: %04x\n",
196 CTCM_FUNTAIL, ch->id, msg, rc);
199 pr_info("%s: The communication peer is busy\n",
201 fsm_event(ch->fsm, CTC_EVENT_IO_EBUSY, ch);
204 pr_err("%s: The specified target device is not valid\n",
206 fsm_event(ch->fsm, CTC_EVENT_IO_ENODEV, ch);
209 pr_err("An I/O operation resulted in error %04x\n",
211 fsm_event(ch->fsm, CTC_EVENT_IO_UNKNOWN, ch);
215 void ctcm_purge_skb_queue(struct sk_buff_head *q)
219 CTCM_DBF_TEXT(TRACE, CTC_DBF_DEBUG, __func__);
221 while ((skb = skb_dequeue(q))) {
222 atomic_dec(&skb->users);
223 dev_kfree_skb_any(skb);
228 * NOP action for statemachines
230 static void ctcm_action_nop(fsm_instance *fi, int event, void *arg)
235 * Actions for channel - statemachines.
239 * Normal data has been send. Free the corresponding
240 * skb (it's in io_queue), reset dev->tbusy and
241 * revert to idle state.
243 * fi An instance of a channel statemachine.
244 * event The event, just happened.
245 * arg Generic pointer, casted from channel * upon call.
247 static void chx_txdone(fsm_instance *fi, int event, void *arg)
249 struct channel *ch = arg;
250 struct net_device *dev = ch->netdev;
251 struct ctcm_priv *priv = dev->ml_priv;
255 unsigned long duration;
256 struct timespec done_stamp = current_kernel_time(); /* xtime */
258 CTCM_PR_DEBUG("%s(%s): %s\n", __func__, ch->id, dev->name);
261 (done_stamp.tv_sec - ch->prof.send_stamp.tv_sec) * 1000000 +
262 (done_stamp.tv_nsec - ch->prof.send_stamp.tv_nsec) / 1000;
263 if (duration > ch->prof.tx_time)
264 ch->prof.tx_time = duration;
266 if (ch->irb->scsw.cmd.count != 0)
267 CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG,
268 "%s(%s): TX not complete, remaining %d bytes",
269 CTCM_FUNTAIL, dev->name, ch->irb->scsw.cmd.count);
270 fsm_deltimer(&ch->timer);
271 while ((skb = skb_dequeue(&ch->io_queue))) {
272 priv->stats.tx_packets++;
273 priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH;
275 priv->stats.tx_bytes += 2;
278 atomic_dec(&skb->users);
279 dev_kfree_skb_irq(skb);
281 spin_lock(&ch->collect_lock);
282 clear_normalized_cda(&ch->ccw[4]);
283 if (ch->collect_len > 0) {
286 if (ctcm_checkalloc_buffer(ch)) {
287 spin_unlock(&ch->collect_lock);
290 ch->trans_skb->data = ch->trans_skb_data;
291 skb_reset_tail_pointer(ch->trans_skb);
292 ch->trans_skb->len = 0;
293 if (ch->prof.maxmulti < (ch->collect_len + 2))
294 ch->prof.maxmulti = ch->collect_len + 2;
295 if (ch->prof.maxcqueue < skb_queue_len(&ch->collect_queue))
296 ch->prof.maxcqueue = skb_queue_len(&ch->collect_queue);
297 *((__u16 *)skb_put(ch->trans_skb, 2)) = ch->collect_len + 2;
299 while ((skb = skb_dequeue(&ch->collect_queue))) {
300 skb_copy_from_linear_data(skb,
301 skb_put(ch->trans_skb, skb->len), skb->len);
302 priv->stats.tx_packets++;
303 priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH;
304 atomic_dec(&skb->users);
305 dev_kfree_skb_irq(skb);
309 spin_unlock(&ch->collect_lock);
310 ch->ccw[1].count = ch->trans_skb->len;
311 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
312 ch->prof.send_stamp = current_kernel_time(); /* xtime */
313 rc = ccw_device_start(ch->cdev, &ch->ccw[0],
314 (unsigned long)ch, 0xff, 0);
315 ch->prof.doios_multi++;
317 priv->stats.tx_dropped += i;
318 priv->stats.tx_errors += i;
319 fsm_deltimer(&ch->timer);
320 ctcm_ccw_check_rc(ch, rc, "chained TX");
323 spin_unlock(&ch->collect_lock);
324 fsm_newstate(fi, CTC_STATE_TXIDLE);
326 ctcm_clear_busy_do(dev);
330 * Initial data is sent.
331 * Notify device statemachine that we are up and
334 * fi An instance of a channel statemachine.
335 * event The event, just happened.
336 * arg Generic pointer, casted from channel * upon call.
338 void ctcm_chx_txidle(fsm_instance *fi, int event, void *arg)
340 struct channel *ch = arg;
341 struct net_device *dev = ch->netdev;
342 struct ctcm_priv *priv = dev->ml_priv;
344 CTCM_PR_DEBUG("%s(%s): %s\n", __func__, ch->id, dev->name);
346 fsm_deltimer(&ch->timer);
347 fsm_newstate(fi, CTC_STATE_TXIDLE);
348 fsm_event(priv->fsm, DEV_EVENT_TXUP, ch->netdev);
352 * Got normal data, check for sanity, queue it up, allocate new buffer
353 * trigger bottom half, and initiate next read.
355 * fi An instance of a channel statemachine.
356 * event The event, just happened.
357 * arg Generic pointer, casted from channel * upon call.
359 static void chx_rx(fsm_instance *fi, int event, void *arg)
361 struct channel *ch = arg;
362 struct net_device *dev = ch->netdev;
363 struct ctcm_priv *priv = dev->ml_priv;
364 int len = ch->max_bufsize - ch->irb->scsw.cmd.count;
365 struct sk_buff *skb = ch->trans_skb;
366 __u16 block_len = *((__u16 *)skb->data);
370 fsm_deltimer(&ch->timer);
372 CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE,
373 "%s(%s): got packet with length %d < 8\n",
374 CTCM_FUNTAIL, dev->name, len);
375 priv->stats.rx_dropped++;
376 priv->stats.rx_length_errors++;
379 if (len > ch->max_bufsize) {
380 CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE,
381 "%s(%s): got packet with length %d > %d\n",
382 CTCM_FUNTAIL, dev->name, len, ch->max_bufsize);
383 priv->stats.rx_dropped++;
384 priv->stats.rx_length_errors++;
389 * VM TCP seems to have a bug sending 2 trailing bytes of garbage.
391 switch (ch->protocol) {
392 case CTCM_PROTO_S390:
393 case CTCM_PROTO_OS390:
394 check_len = block_len + 2;
397 check_len = block_len;
400 if ((len < block_len) || (len > check_len)) {
401 CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE,
402 "%s(%s): got block length %d != rx length %d\n",
403 CTCM_FUNTAIL, dev->name, block_len, len);
405 ctcmpc_dump_skb(skb, 0);
407 *((__u16 *)skb->data) = len;
408 priv->stats.rx_dropped++;
409 priv->stats.rx_length_errors++;
413 *((__u16 *)skb->data) = block_len - 2;
414 ctcm_unpack_skb(ch, skb);
417 skb->data = ch->trans_skb_data;
418 skb_reset_tail_pointer(skb);
420 if (ctcm_checkalloc_buffer(ch))
422 ch->ccw[1].count = ch->max_bufsize;
423 rc = ccw_device_start(ch->cdev, &ch->ccw[0],
424 (unsigned long)ch, 0xff, 0);
426 ctcm_ccw_check_rc(ch, rc, "normal RX");
430 * Initialize connection by sending a __u16 of value 0.
432 * fi An instance of a channel statemachine.
433 * event The event, just happened.
434 * arg Generic pointer, casted from channel * upon call.
436 static void chx_firstio(fsm_instance *fi, int event, void *arg)
439 struct channel *ch = arg;
440 int fsmstate = fsm_getstate(fi);
442 CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE,
444 CTCM_FUNTAIL, ch->id, fsmstate);
446 ch->sense_rc = 0; /* reset unit check report control */
447 if (fsmstate == CTC_STATE_TXIDLE)
448 CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG,
449 "%s(%s): remote side issued READ?, init.\n",
450 CTCM_FUNTAIL, ch->id);
451 fsm_deltimer(&ch->timer);
452 if (ctcm_checkalloc_buffer(ch))
454 if ((fsmstate == CTC_STATE_SETUPWAIT) &&
455 (ch->protocol == CTCM_PROTO_OS390)) {
456 /* OS/390 resp. z/OS */
457 if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) {
458 *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN;
459 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC,
460 CTC_EVENT_TIMER, ch);
461 chx_rxidle(fi, event, arg);
463 struct net_device *dev = ch->netdev;
464 struct ctcm_priv *priv = dev->ml_priv;
465 fsm_newstate(fi, CTC_STATE_TXIDLE);
466 fsm_event(priv->fsm, DEV_EVENT_TXUP, dev);
471 * Don't setup a timer for receiving the initial RX frame
472 * if in compatibility mode, since VM TCP delays the initial
473 * frame until it has some data to send.
475 if ((CHANNEL_DIRECTION(ch->flags) == CTCM_WRITE) ||
476 (ch->protocol != CTCM_PROTO_S390))
477 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
479 *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN;
480 ch->ccw[1].count = 2; /* Transfer only length */
482 fsm_newstate(fi, (CHANNEL_DIRECTION(ch->flags) == CTCM_READ)
483 ? CTC_STATE_RXINIT : CTC_STATE_TXINIT);
484 rc = ccw_device_start(ch->cdev, &ch->ccw[0],
485 (unsigned long)ch, 0xff, 0);
487 fsm_deltimer(&ch->timer);
488 fsm_newstate(fi, CTC_STATE_SETUPWAIT);
489 ctcm_ccw_check_rc(ch, rc, "init IO");
492 * If in compatibility mode since we don't setup a timer, we
493 * also signal RX channel up immediately. This enables us
494 * to send packets early which in turn usually triggers some
495 * reply from VM TCP which brings up the RX channel to it's
498 if ((CHANNEL_DIRECTION(ch->flags) == CTCM_READ) &&
499 (ch->protocol == CTCM_PROTO_S390)) {
500 struct net_device *dev = ch->netdev;
501 struct ctcm_priv *priv = dev->ml_priv;
502 fsm_event(priv->fsm, DEV_EVENT_RXUP, dev);
507 * Got initial data, check it. If OK,
508 * notify device statemachine that we are up and
511 * fi An instance of a channel statemachine.
512 * event The event, just happened.
513 * arg Generic pointer, casted from channel * upon call.
515 static void chx_rxidle(fsm_instance *fi, int event, void *arg)
517 struct channel *ch = arg;
518 struct net_device *dev = ch->netdev;
519 struct ctcm_priv *priv = dev->ml_priv;
523 fsm_deltimer(&ch->timer);
524 buflen = *((__u16 *)ch->trans_skb->data);
525 CTCM_PR_DEBUG("%s: %s: Initial RX count = %d\n",
526 __func__, dev->name, buflen);
528 if (buflen >= CTCM_INITIAL_BLOCKLEN) {
529 if (ctcm_checkalloc_buffer(ch))
531 ch->ccw[1].count = ch->max_bufsize;
532 fsm_newstate(fi, CTC_STATE_RXIDLE);
533 rc = ccw_device_start(ch->cdev, &ch->ccw[0],
534 (unsigned long)ch, 0xff, 0);
536 fsm_newstate(fi, CTC_STATE_RXINIT);
537 ctcm_ccw_check_rc(ch, rc, "initial RX");
539 fsm_event(priv->fsm, DEV_EVENT_RXUP, dev);
541 CTCM_PR_DEBUG("%s: %s: Initial RX count %d not %d\n",
543 buflen, CTCM_INITIAL_BLOCKLEN);
544 chx_firstio(fi, event, arg);
549 * Set channel into extended mode.
551 * fi An instance of a channel statemachine.
552 * event The event, just happened.
553 * arg Generic pointer, casted from channel * upon call.
555 static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg)
557 struct channel *ch = arg;
559 unsigned long saveflags = 0;
560 int timeout = CTCM_TIME_5_SEC;
562 fsm_deltimer(&ch->timer);
565 CTCM_PR_DEBUG("enter %s: cp=%i ch=0x%p id=%s\n",
566 __func__, smp_processor_id(), ch, ch->id);
568 fsm_addtimer(&ch->timer, timeout, CTC_EVENT_TIMER, ch);
569 fsm_newstate(fi, CTC_STATE_SETUPWAIT);
570 CTCM_CCW_DUMP((char *)&ch->ccw[6], sizeof(struct ccw1) * 2);
572 if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */
573 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
574 /* Such conditional locking is undeterministic in
575 * static view. => ignore sparse warnings here. */
577 rc = ccw_device_start(ch->cdev, &ch->ccw[6],
578 (unsigned long)ch, 0xff, 0);
579 if (event == CTC_EVENT_TIMER) /* see above comments */
580 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
582 fsm_deltimer(&ch->timer);
583 fsm_newstate(fi, CTC_STATE_STARTWAIT);
584 ctcm_ccw_check_rc(ch, rc, "set Mode");
592 * fi An instance of a channel statemachine.
593 * event The event, just happened.
594 * arg Generic pointer, casted from channel * upon call.
596 static void ctcm_chx_start(fsm_instance *fi, int event, void *arg)
598 struct channel *ch = arg;
599 unsigned long saveflags;
602 CTCM_DBF_TEXT_(SETUP, CTC_DBF_INFO, "%s(%s): %s",
603 CTCM_FUNTAIL, ch->id,
604 (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? "RX" : "TX");
606 if (ch->trans_skb != NULL) {
607 clear_normalized_cda(&ch->ccw[1]);
608 dev_kfree_skb(ch->trans_skb);
609 ch->trans_skb = NULL;
611 if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) {
612 ch->ccw[1].cmd_code = CCW_CMD_READ;
613 ch->ccw[1].flags = CCW_FLAG_SLI;
614 ch->ccw[1].count = 0;
616 ch->ccw[1].cmd_code = CCW_CMD_WRITE;
617 ch->ccw[1].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
618 ch->ccw[1].count = 0;
620 if (ctcm_checkalloc_buffer(ch)) {
621 CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG,
622 "%s(%s): %s trans_skb alloc delayed "
623 "until first transfer",
624 CTCM_FUNTAIL, ch->id,
625 (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ?
628 ch->ccw[0].cmd_code = CCW_CMD_PREPARE;
629 ch->ccw[0].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
630 ch->ccw[0].count = 0;
632 ch->ccw[2].cmd_code = CCW_CMD_NOOP; /* jointed CE + DE */
633 ch->ccw[2].flags = CCW_FLAG_SLI;
634 ch->ccw[2].count = 0;
636 memcpy(&ch->ccw[3], &ch->ccw[0], sizeof(struct ccw1) * 3);
638 ch->ccw[4].flags &= ~CCW_FLAG_IDA;
640 fsm_newstate(fi, CTC_STATE_STARTWAIT);
641 fsm_addtimer(&ch->timer, 1000, CTC_EVENT_TIMER, ch);
642 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
643 rc = ccw_device_halt(ch->cdev, (unsigned long)ch);
644 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
647 fsm_deltimer(&ch->timer);
648 ctcm_ccw_check_rc(ch, rc, "initial HaltIO");
653 * Shutdown a channel.
655 * fi An instance of a channel statemachine.
656 * event The event, just happened.
657 * arg Generic pointer, casted from channel * upon call.
659 static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg)
661 struct channel *ch = arg;
662 unsigned long saveflags = 0;
666 fsm_deltimer(&ch->timer);
668 fsm_deltimer(&ch->sweep_timer);
670 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
672 if (event == CTC_EVENT_STOP) /* only for STOP not yet locked */
673 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
674 /* Such conditional locking is undeterministic in
675 * static view. => ignore sparse warnings here. */
676 oldstate = fsm_getstate(fi);
677 fsm_newstate(fi, CTC_STATE_TERM);
678 rc = ccw_device_halt(ch->cdev, (unsigned long)ch);
680 if (event == CTC_EVENT_STOP)
681 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
682 /* see remark above about conditional locking */
684 if (rc != 0 && rc != -EBUSY) {
685 fsm_deltimer(&ch->timer);
686 if (event != CTC_EVENT_STOP) {
687 fsm_newstate(fi, oldstate);
688 ctcm_ccw_check_rc(ch, rc, (char *)__func__);
694 * Cleanup helper for chx_fail and chx_stopped
695 * cleanup channels queue and notify interface statemachine.
697 * fi An instance of a channel statemachine.
698 * state The next state (depending on caller).
699 * ch The channel to operate on.
701 static void ctcm_chx_cleanup(fsm_instance *fi, int state,
704 struct net_device *dev = ch->netdev;
705 struct ctcm_priv *priv = dev->ml_priv;
707 CTCM_DBF_TEXT_(SETUP, CTC_DBF_NOTICE,
709 CTCM_FUNTAIL, dev->name, ch->id, state);
711 fsm_deltimer(&ch->timer);
713 fsm_deltimer(&ch->sweep_timer);
715 fsm_newstate(fi, state);
716 if (state == CTC_STATE_STOPPED && ch->trans_skb != NULL) {
717 clear_normalized_cda(&ch->ccw[1]);
718 dev_kfree_skb_any(ch->trans_skb);
719 ch->trans_skb = NULL;
723 ch->th_seq_num = 0x00;
724 if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) {
725 skb_queue_purge(&ch->io_queue);
726 fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
728 ctcm_purge_skb_queue(&ch->io_queue);
730 ctcm_purge_skb_queue(&ch->sweep_queue);
731 spin_lock(&ch->collect_lock);
732 ctcm_purge_skb_queue(&ch->collect_queue);
734 spin_unlock(&ch->collect_lock);
735 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
740 * A channel has successfully been halted.
741 * Cleanup it's queue and notify interface statemachine.
743 * fi An instance of a channel statemachine.
744 * event The event, just happened.
745 * arg Generic pointer, casted from channel * upon call.
747 static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg)
749 ctcm_chx_cleanup(fi, CTC_STATE_STOPPED, arg);
753 * A stop command from device statemachine arrived and we are in
754 * not operational mode. Set state to stopped.
756 * fi An instance of a channel statemachine.
757 * event The event, just happened.
758 * arg Generic pointer, casted from channel * upon call.
760 static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg)
762 fsm_newstate(fi, CTC_STATE_STOPPED);
766 * A machine check for no path, not operational status or gone device has
768 * Cleanup queue and notify interface statemachine.
770 * fi An instance of a channel statemachine.
771 * event The event, just happened.
772 * arg Generic pointer, casted from channel * upon call.
774 static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg)
776 ctcm_chx_cleanup(fi, CTC_STATE_NOTOP, arg);
780 * Handle error during setup of channel.
782 * fi An instance of a channel statemachine.
783 * event The event, just happened.
784 * arg Generic pointer, casted from channel * upon call.
786 static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg)
788 struct channel *ch = arg;
789 struct net_device *dev = ch->netdev;
790 struct ctcm_priv *priv = dev->ml_priv;
793 * Special case: Got UC_RCRESET on setmode.
794 * This means that remote side isn't setup. In this case
795 * simply retry after some 10 secs...
797 if ((fsm_getstate(fi) == CTC_STATE_SETUPWAIT) &&
798 ((event == CTC_EVENT_UC_RCRESET) ||
799 (event == CTC_EVENT_UC_RSRESET))) {
800 fsm_newstate(fi, CTC_STATE_STARTRETRY);
801 fsm_deltimer(&ch->timer);
802 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
804 (CHANNEL_DIRECTION(ch->flags) == CTCM_READ)) {
805 int rc = ccw_device_halt(ch->cdev, (unsigned long)ch);
807 ctcm_ccw_check_rc(ch, rc,
808 "HaltIO in chx_setuperr");
813 CTCM_DBF_TEXT_(ERROR, CTC_DBF_CRIT,
814 "%s(%s) : %s error during %s channel setup state=%s\n",
815 CTCM_FUNTAIL, dev->name, ctc_ch_event_names[event],
816 (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? "RX" : "TX",
817 fsm_getstate_str(fi));
819 if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) {
820 fsm_newstate(fi, CTC_STATE_RXERR);
821 fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
823 fsm_newstate(fi, CTC_STATE_TXERR);
824 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
829 * Restart a channel after an error.
831 * fi An instance of a channel statemachine.
832 * event The event, just happened.
833 * arg Generic pointer, casted from channel * upon call.
835 static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg)
837 struct channel *ch = arg;
838 struct net_device *dev = ch->netdev;
839 unsigned long saveflags = 0;
843 CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE,
844 "%s: %s[%d] of %s\n",
845 CTCM_FUNTAIL, ch->id, event, dev->name);
847 fsm_deltimer(&ch->timer);
849 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
850 oldstate = fsm_getstate(fi);
851 fsm_newstate(fi, CTC_STATE_STARTWAIT);
852 if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */
853 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
854 /* Such conditional locking is a known problem for
855 * sparse because its undeterministic in static view.
856 * Warnings should be ignored here. */
857 rc = ccw_device_halt(ch->cdev, (unsigned long)ch);
858 if (event == CTC_EVENT_TIMER)
859 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
862 fsm_deltimer(&ch->timer);
863 fsm_newstate(fi, oldstate);
865 ctcm_ccw_check_rc(ch, rc, "HaltIO in ctcm_chx_restart");
870 * Handle error during RX initial handshake (exchange of
871 * 0-length block header)
873 * fi An instance of a channel statemachine.
874 * event The event, just happened.
875 * arg Generic pointer, casted from channel * upon call.
877 static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg)
879 struct channel *ch = arg;
880 struct net_device *dev = ch->netdev;
881 struct ctcm_priv *priv = dev->ml_priv;
883 if (event == CTC_EVENT_TIMER) {
885 /* TODO : check if MPC deletes timer somewhere */
886 fsm_deltimer(&ch->timer);
888 ctcm_chx_restart(fi, event, arg);
890 fsm_newstate(fi, CTC_STATE_RXERR);
891 fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
894 CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR,
895 "%s(%s): %s in %s", CTCM_FUNTAIL, ch->id,
896 ctc_ch_event_names[event], fsm_getstate_str(fi));
899 "Initialization failed with RX/TX init handshake "
900 "error %s\n", ctc_ch_event_names[event]);
905 * Notify device statemachine if we gave up initialization
908 * fi An instance of a channel statemachine.
909 * event The event, just happened.
910 * arg Generic pointer, casted from channel * upon call.
912 static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg)
914 struct channel *ch = arg;
915 struct net_device *dev = ch->netdev;
916 struct ctcm_priv *priv = dev->ml_priv;
918 CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR,
919 "%s(%s): RX %s busy, init. fail",
920 CTCM_FUNTAIL, dev->name, ch->id);
921 fsm_newstate(fi, CTC_STATE_RXERR);
922 fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
926 * Handle RX Unit check remote reset (remote disconnected)
928 * fi An instance of a channel statemachine.
929 * event The event, just happened.
930 * arg Generic pointer, casted from channel * upon call.
932 static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg)
934 struct channel *ch = arg;
936 struct net_device *dev = ch->netdev;
937 struct ctcm_priv *priv = dev->ml_priv;
939 CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE,
940 "%s: %s: remote disconnect - re-init ...",
941 CTCM_FUNTAIL, dev->name);
942 fsm_deltimer(&ch->timer);
944 * Notify device statemachine
946 fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
947 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
949 fsm_newstate(fi, CTC_STATE_DTERM);
950 ch2 = priv->channel[CTCM_WRITE];
951 fsm_newstate(ch2->fsm, CTC_STATE_DTERM);
953 ccw_device_halt(ch->cdev, (unsigned long)ch);
954 ccw_device_halt(ch2->cdev, (unsigned long)ch2);
958 * Handle error during TX channel initialization.
960 * fi An instance of a channel statemachine.
961 * event The event, just happened.
962 * arg Generic pointer, casted from channel * upon call.
964 static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg)
966 struct channel *ch = arg;
967 struct net_device *dev = ch->netdev;
968 struct ctcm_priv *priv = dev->ml_priv;
970 if (event == CTC_EVENT_TIMER) {
971 fsm_deltimer(&ch->timer);
973 ctcm_chx_restart(fi, event, arg);
975 fsm_newstate(fi, CTC_STATE_TXERR);
976 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
979 CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR,
980 "%s(%s): %s in %s", CTCM_FUNTAIL, ch->id,
981 ctc_ch_event_names[event], fsm_getstate_str(fi));
984 "Initialization failed with RX/TX init handshake "
985 "error %s\n", ctc_ch_event_names[event]);
990 * Handle TX timeout by retrying operation.
992 * fi An instance of a channel statemachine.
993 * event The event, just happened.
994 * arg Generic pointer, casted from channel * upon call.
996 static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg)
998 struct channel *ch = arg;
999 struct net_device *dev = ch->netdev;
1000 struct ctcm_priv *priv = dev->ml_priv;
1001 struct sk_buff *skb;
1003 CTCM_PR_DEBUG("Enter: %s: cp=%i ch=0x%p id=%s\n",
1004 __func__, smp_processor_id(), ch, ch->id);
1006 fsm_deltimer(&ch->timer);
1007 if (ch->retry++ > 3) {
1008 struct mpc_group *gptr = priv->mpcg;
1009 CTCM_DBF_TEXT_(TRACE, CTC_DBF_INFO,
1010 "%s: %s: retries exceeded",
1011 CTCM_FUNTAIL, ch->id);
1012 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
1013 /* call restart if not MPC or if MPC and mpcg fsm is ready.
1014 use gptr as mpc indicator */
1015 if (!(gptr && (fsm_getstate(gptr->fsm) != MPCG_STATE_READY)))
1016 ctcm_chx_restart(fi, event, arg);
1020 CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG,
1021 "%s : %s: retry %d",
1022 CTCM_FUNTAIL, ch->id, ch->retry);
1023 skb = skb_peek(&ch->io_queue);
1026 unsigned long saveflags = 0;
1027 clear_normalized_cda(&ch->ccw[4]);
1028 ch->ccw[4].count = skb->len;
1029 if (set_normalized_cda(&ch->ccw[4], skb->data)) {
1030 CTCM_DBF_TEXT_(TRACE, CTC_DBF_INFO,
1031 "%s: %s: IDAL alloc failed",
1032 CTCM_FUNTAIL, ch->id);
1033 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
1034 ctcm_chx_restart(fi, event, arg);
1037 fsm_addtimer(&ch->timer, 1000, CTC_EVENT_TIMER, ch);
1038 if (event == CTC_EVENT_TIMER) /* for TIMER not yet locked */
1039 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
1040 /* Such conditional locking is a known problem for
1041 * sparse because its undeterministic in static view.
1042 * Warnings should be ignored here. */
1044 ctcmpc_dumpit((char *)&ch->ccw[3],
1045 sizeof(struct ccw1) * 3);
1047 rc = ccw_device_start(ch->cdev, &ch->ccw[3],
1048 (unsigned long)ch, 0xff, 0);
1049 if (event == CTC_EVENT_TIMER)
1050 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev),
1053 fsm_deltimer(&ch->timer);
1054 ctcm_ccw_check_rc(ch, rc, "TX in chx_txretry");
1055 ctcm_purge_skb_queue(&ch->io_queue);
1063 * Handle fatal errors during an I/O command.
1065 * fi An instance of a channel statemachine.
1066 * event The event, just happened.
1067 * arg Generic pointer, casted from channel * upon call.
1069 static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg)
1071 struct channel *ch = arg;
1072 struct net_device *dev = ch->netdev;
1073 struct ctcm_priv *priv = dev->ml_priv;
1074 int rd = CHANNEL_DIRECTION(ch->flags);
1076 fsm_deltimer(&ch->timer);
1077 CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR,
1078 "%s: %s: %s unrecoverable channel error",
1079 CTCM_FUNTAIL, ch->id, rd == CTCM_READ ? "RX" : "TX");
1082 priv->stats.tx_dropped++;
1083 priv->stats.tx_errors++;
1085 if (rd == CTCM_READ) {
1086 fsm_newstate(fi, CTC_STATE_RXERR);
1087 fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
1089 fsm_newstate(fi, CTC_STATE_TXERR);
1090 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
1095 * The ctcm statemachine for a channel.
1097 const fsm_node ch_fsm[] = {
1098 { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop },
1099 { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start },
1100 { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop },
1101 { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop },
1103 { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop },
1104 { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop },
1105 { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop },
1106 { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop },
1107 { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start },
1109 { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1110 { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop },
1111 { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
1112 { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr },
1113 { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1114 { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1116 { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio },
1117 { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode },
1118 { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_action_nop },
1119 { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1121 { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1122 { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop },
1123 { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, chx_firstio },
1124 { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1125 { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1126 { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode },
1127 { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1128 { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1130 { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1131 { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop },
1132 { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, chx_rxidle },
1133 { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr },
1134 { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr },
1135 { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr },
1136 { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail },
1137 { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1138 { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, chx_firstio },
1139 { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1141 { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio },
1142 { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop },
1143 { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, chx_rx },
1144 { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc },
1145 { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1146 { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1147 { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, chx_rx },
1149 { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1150 { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop },
1151 { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle },
1152 { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr },
1153 { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr },
1154 { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr },
1155 { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1156 { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1158 { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio },
1159 { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop },
1160 { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, chx_firstio },
1161 { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
1162 { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
1163 { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1164 { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1166 { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop },
1167 { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart },
1168 { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped },
1169 { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
1170 { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
1171 { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1173 { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio },
1174 { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart },
1175 { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
1176 { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
1177 { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
1178 { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1180 { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio },
1181 { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop },
1182 { CTC_STATE_TX, CTC_EVENT_FINSTAT, chx_txdone },
1183 { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_txretry },
1184 { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_txretry },
1185 { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry },
1186 { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1187 { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1189 { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio },
1190 { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio },
1191 { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1192 { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1195 int ch_fsm_len = ARRAY_SIZE(ch_fsm);
1198 * MPC actions for mpc channel statemachine
1199 * handling of MPC protocol requires extra
1200 * statemachine and actions which are prefixed ctcmpc_ .
1201 * The ctc_ch_states and ctc_ch_state_names,
1202 * ctc_ch_events and ctc_ch_event_names share the ctcm definitions
1203 * which are expanded by some elements.
1207 * Actions for mpc channel statemachine.
1211 * Normal data has been send. Free the corresponding
1212 * skb (it's in io_queue), reset dev->tbusy and
1213 * revert to idle state.
1215 * fi An instance of a channel statemachine.
1216 * event The event, just happened.
1217 * arg Generic pointer, casted from channel * upon call.
1219 static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg)
1221 struct channel *ch = arg;
1222 struct net_device *dev = ch->netdev;
1223 struct ctcm_priv *priv = dev->ml_priv;
1224 struct mpc_group *grp = priv->mpcg;
1225 struct sk_buff *skb;
1229 unsigned long duration;
1230 struct sk_buff *peekskb;
1232 struct th_header *header;
1233 struct pdu *p_header;
1234 struct timespec done_stamp = current_kernel_time(); /* xtime */
1236 CTCM_PR_DEBUG("Enter %s: %s cp:%i\n",
1237 __func__, dev->name, smp_processor_id());
1240 (done_stamp.tv_sec - ch->prof.send_stamp.tv_sec) * 1000000 +
1241 (done_stamp.tv_nsec - ch->prof.send_stamp.tv_nsec) / 1000;
1242 if (duration > ch->prof.tx_time)
1243 ch->prof.tx_time = duration;
1245 if (ch->irb->scsw.cmd.count != 0)
1246 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG,
1247 "%s(%s): TX not complete, remaining %d bytes",
1248 CTCM_FUNTAIL, dev->name, ch->irb->scsw.cmd.count);
1249 fsm_deltimer(&ch->timer);
1250 while ((skb = skb_dequeue(&ch->io_queue))) {
1251 priv->stats.tx_packets++;
1252 priv->stats.tx_bytes += skb->len - TH_HEADER_LENGTH;
1254 priv->stats.tx_bytes += 2;
1257 atomic_dec(&skb->users);
1258 dev_kfree_skb_irq(skb);
1260 spin_lock(&ch->collect_lock);
1261 clear_normalized_cda(&ch->ccw[4]);
1262 if ((ch->collect_len <= 0) || (grp->in_sweep != 0)) {
1263 spin_unlock(&ch->collect_lock);
1264 fsm_newstate(fi, CTC_STATE_TXIDLE);
1268 if (ctcm_checkalloc_buffer(ch)) {
1269 spin_unlock(&ch->collect_lock);
1272 ch->trans_skb->data = ch->trans_skb_data;
1273 skb_reset_tail_pointer(ch->trans_skb);
1274 ch->trans_skb->len = 0;
1275 if (ch->prof.maxmulti < (ch->collect_len + TH_HEADER_LENGTH))
1276 ch->prof.maxmulti = ch->collect_len + TH_HEADER_LENGTH;
1277 if (ch->prof.maxcqueue < skb_queue_len(&ch->collect_queue))
1278 ch->prof.maxcqueue = skb_queue_len(&ch->collect_queue);
1281 data_space = grp->group_max_buflen - TH_HEADER_LENGTH;
1283 CTCM_PR_DBGDATA("%s: building trans_skb from collect_q"
1284 " data_space:%04x\n",
1285 __func__, data_space);
1287 while ((skb = skb_dequeue(&ch->collect_queue))) {
1288 memcpy(skb_put(ch->trans_skb, skb->len), skb->data, skb->len);
1289 p_header = (struct pdu *)
1290 (skb_tail_pointer(ch->trans_skb) - skb->len);
1291 p_header->pdu_flag = 0x00;
1292 if (skb->protocol == ntohs(ETH_P_SNAP))
1293 p_header->pdu_flag |= 0x60;
1295 p_header->pdu_flag |= 0x20;
1297 CTCM_PR_DBGDATA("%s: trans_skb len:%04x \n",
1298 __func__, ch->trans_skb->len);
1299 CTCM_PR_DBGDATA("%s: pdu header and data for up"
1300 " to 32 bytes sent to vtam\n", __func__);
1301 CTCM_D3_DUMP((char *)p_header, min_t(int, skb->len, 32));
1303 ch->collect_len -= skb->len;
1304 data_space -= skb->len;
1305 priv->stats.tx_packets++;
1306 priv->stats.tx_bytes += skb->len;
1307 atomic_dec(&skb->users);
1308 dev_kfree_skb_any(skb);
1309 peekskb = skb_peek(&ch->collect_queue);
1310 if (peekskb->len > data_space)
1314 /* p_header points to the last one we handled */
1316 p_header->pdu_flag |= PDU_LAST; /*Say it's the last one*/
1317 header = kzalloc(TH_HEADER_LENGTH, gfp_type());
1319 spin_unlock(&ch->collect_lock);
1320 fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev);
1323 header->th_ch_flag = TH_HAS_PDU; /* Normal data */
1325 header->th_seq_num = ch->th_seq_num;
1327 CTCM_PR_DBGDATA("%s: ToVTAM_th_seq= %08x\n" ,
1328 __func__, ch->th_seq_num);
1330 memcpy(skb_push(ch->trans_skb, TH_HEADER_LENGTH), header,
1331 TH_HEADER_LENGTH); /* put the TH on the packet */
1335 CTCM_PR_DBGDATA("%s: trans_skb len:%04x \n",
1336 __func__, ch->trans_skb->len);
1337 CTCM_PR_DBGDATA("%s: up-to-50 bytes of trans_skb "
1338 "data to vtam from collect_q\n", __func__);
1339 CTCM_D3_DUMP((char *)ch->trans_skb->data,
1340 min_t(int, ch->trans_skb->len, 50));
1342 spin_unlock(&ch->collect_lock);
1343 clear_normalized_cda(&ch->ccw[1]);
1345 CTCM_PR_DBGDATA("ccwcda=0x%p data=0x%p\n",
1346 (void *)(unsigned long)ch->ccw[1].cda,
1347 ch->trans_skb->data);
1348 ch->ccw[1].count = ch->max_bufsize;
1350 if (set_normalized_cda(&ch->ccw[1], ch->trans_skb->data)) {
1351 dev_kfree_skb_any(ch->trans_skb);
1352 ch->trans_skb = NULL;
1353 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ERROR,
1354 "%s: %s: IDAL alloc failed",
1355 CTCM_FUNTAIL, ch->id);
1356 fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev);
1360 CTCM_PR_DBGDATA("ccwcda=0x%p data=0x%p\n",
1361 (void *)(unsigned long)ch->ccw[1].cda,
1362 ch->trans_skb->data);
1364 ch->ccw[1].count = ch->trans_skb->len;
1365 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
1366 ch->prof.send_stamp = current_kernel_time(); /* xtime */
1368 ctcmpc_dumpit((char *)&ch->ccw[0], sizeof(struct ccw1) * 3);
1369 rc = ccw_device_start(ch->cdev, &ch->ccw[0],
1370 (unsigned long)ch, 0xff, 0);
1371 ch->prof.doios_multi++;
1373 priv->stats.tx_dropped += i;
1374 priv->stats.tx_errors += i;
1375 fsm_deltimer(&ch->timer);
1376 ctcm_ccw_check_rc(ch, rc, "chained TX");
1379 ctcm_clear_busy(dev);
1384 * Got normal data, check for sanity, queue it up, allocate new buffer
1385 * trigger bottom half, and initiate next read.
1387 * fi An instance of a channel statemachine.
1388 * event The event, just happened.
1389 * arg Generic pointer, casted from channel * upon call.
1391 static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg)
1393 struct channel *ch = arg;
1394 struct net_device *dev = ch->netdev;
1395 struct ctcm_priv *priv = dev->ml_priv;
1396 struct mpc_group *grp = priv->mpcg;
1397 struct sk_buff *skb = ch->trans_skb;
1398 struct sk_buff *new_skb;
1399 unsigned long saveflags = 0; /* avoids compiler warning */
1400 int len = ch->max_bufsize - ch->irb->scsw.cmd.count;
1402 CTCM_PR_DEBUG("%s: %s: cp:%i %s maxbuf : %04x, len: %04x\n",
1403 CTCM_FUNTAIL, dev->name, smp_processor_id(),
1404 ch->id, ch->max_bufsize, len);
1405 fsm_deltimer(&ch->timer);
1408 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1409 "%s(%s): TRANS_SKB = NULL",
1410 CTCM_FUNTAIL, dev->name);
1414 if (len < TH_HEADER_LENGTH) {
1415 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1416 "%s(%s): packet length %d to short",
1417 CTCM_FUNTAIL, dev->name, len);
1418 priv->stats.rx_dropped++;
1419 priv->stats.rx_length_errors++;
1421 /* must have valid th header or game over */
1422 __u32 block_len = len;
1423 len = TH_HEADER_LENGTH + XID2_LENGTH + 4;
1424 new_skb = __dev_alloc_skb(ch->max_bufsize, GFP_ATOMIC);
1426 if (new_skb == NULL) {
1427 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1428 "%s(%d): skb allocation failed",
1429 CTCM_FUNTAIL, dev->name);
1430 fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev);
1433 switch (fsm_getstate(grp->fsm)) {
1434 case MPCG_STATE_RESET:
1435 case MPCG_STATE_INOP:
1436 dev_kfree_skb_any(new_skb);
1438 case MPCG_STATE_FLOWC:
1439 case MPCG_STATE_READY:
1440 memcpy(skb_put(new_skb, block_len),
1441 skb->data, block_len);
1442 skb_queue_tail(&ch->io_queue, new_skb);
1443 tasklet_schedule(&ch->ch_tasklet);
1446 memcpy(skb_put(new_skb, len), skb->data, len);
1447 skb_queue_tail(&ch->io_queue, new_skb);
1448 tasklet_hi_schedule(&ch->ch_tasklet);
1454 switch (fsm_getstate(grp->fsm)) {
1456 case MPCG_STATE_FLOWC:
1457 case MPCG_STATE_READY:
1458 if (ctcm_checkalloc_buffer(ch))
1460 ch->trans_skb->data = ch->trans_skb_data;
1461 skb_reset_tail_pointer(ch->trans_skb);
1462 ch->trans_skb->len = 0;
1463 ch->ccw[1].count = ch->max_bufsize;
1465 ctcmpc_dumpit((char *)&ch->ccw[0],
1466 sizeof(struct ccw1) * 3);
1470 get_ccwdev_lock(ch->cdev), saveflags);
1471 rc = ccw_device_start(ch->cdev, &ch->ccw[0],
1472 (unsigned long)ch, 0xff, 0);
1473 if (dolock) /* see remark about conditional locking */
1474 spin_unlock_irqrestore(
1475 get_ccwdev_lock(ch->cdev), saveflags);
1477 ctcm_ccw_check_rc(ch, rc, "normal RX");
1482 CTCM_PR_DEBUG("Exit %s: %s, ch=0x%p, id=%s\n",
1483 __func__, dev->name, ch, ch->id);
1488 * Initialize connection by sending a __u16 of value 0.
1490 * fi An instance of a channel statemachine.
1491 * event The event, just happened.
1492 * arg Generic pointer, casted from channel * upon call.
1494 static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg)
1496 struct channel *ch = arg;
1497 struct net_device *dev = ch->netdev;
1498 struct ctcm_priv *priv = dev->ml_priv;
1499 struct mpc_group *gptr = priv->mpcg;
1501 CTCM_PR_DEBUG("Enter %s: id=%s, ch=0x%p\n",
1502 __func__, ch->id, ch);
1504 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_INFO,
1505 "%s: %s: chstate:%i, grpstate:%i, prot:%i\n",
1506 CTCM_FUNTAIL, ch->id, fsm_getstate(fi),
1507 fsm_getstate(gptr->fsm), ch->protocol);
1509 if (fsm_getstate(fi) == CTC_STATE_TXIDLE)
1510 MPC_DBF_DEV_NAME(TRACE, dev, "remote side issued READ? ");
1512 fsm_deltimer(&ch->timer);
1513 if (ctcm_checkalloc_buffer(ch))
1516 switch (fsm_getstate(fi)) {
1517 case CTC_STATE_STARTRETRY:
1518 case CTC_STATE_SETUPWAIT:
1519 if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) {
1520 ctcmpc_chx_rxidle(fi, event, arg);
1522 fsm_newstate(fi, CTC_STATE_TXIDLE);
1523 fsm_event(priv->fsm, DEV_EVENT_TXUP, dev);
1530 fsm_newstate(fi, (CHANNEL_DIRECTION(ch->flags) == CTCM_READ)
1531 ? CTC_STATE_RXINIT : CTC_STATE_TXINIT);
1534 CTCM_PR_DEBUG("Exit %s: id=%s, ch=0x%p\n",
1535 __func__, ch->id, ch);
1540 * Got initial data, check it. If OK,
1541 * notify device statemachine that we are up and
1544 * fi An instance of a channel statemachine.
1545 * event The event, just happened.
1546 * arg Generic pointer, casted from channel * upon call.
1548 void ctcmpc_chx_rxidle(fsm_instance *fi, int event, void *arg)
1550 struct channel *ch = arg;
1551 struct net_device *dev = ch->netdev;
1552 struct ctcm_priv *priv = dev->ml_priv;
1553 struct mpc_group *grp = priv->mpcg;
1555 unsigned long saveflags = 0; /* avoids compiler warning */
1557 fsm_deltimer(&ch->timer);
1558 CTCM_PR_DEBUG("%s: %s: %s: cp:%i, chstate:%i grpstate:%i\n",
1559 __func__, ch->id, dev->name, smp_processor_id(),
1560 fsm_getstate(fi), fsm_getstate(grp->fsm));
1562 fsm_newstate(fi, CTC_STATE_RXIDLE);
1563 /* XID processing complete */
1565 switch (fsm_getstate(grp->fsm)) {
1566 case MPCG_STATE_FLOWC:
1567 case MPCG_STATE_READY:
1568 if (ctcm_checkalloc_buffer(ch))
1570 ch->trans_skb->data = ch->trans_skb_data;
1571 skb_reset_tail_pointer(ch->trans_skb);
1572 ch->trans_skb->len = 0;
1573 ch->ccw[1].count = ch->max_bufsize;
1574 CTCM_CCW_DUMP((char *)&ch->ccw[0], sizeof(struct ccw1) * 3);
1575 if (event == CTC_EVENT_START)
1576 /* see remark about conditional locking */
1577 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
1578 rc = ccw_device_start(ch->cdev, &ch->ccw[0],
1579 (unsigned long)ch, 0xff, 0);
1580 if (event == CTC_EVENT_START)
1581 spin_unlock_irqrestore(
1582 get_ccwdev_lock(ch->cdev), saveflags);
1584 fsm_newstate(fi, CTC_STATE_RXINIT);
1585 ctcm_ccw_check_rc(ch, rc, "initial RX");
1593 fsm_event(priv->fsm, DEV_EVENT_RXUP, dev);
1599 * ctcmpc channel FSM action
1600 * called from several points in ctcmpc_ch_fsm
1603 static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg)
1605 struct channel *ch = arg;
1606 struct net_device *dev = ch->netdev;
1607 struct ctcm_priv *priv = dev->ml_priv;
1608 struct mpc_group *grp = priv->mpcg;
1610 CTCM_PR_DEBUG("%s(%s): %s(ch=0x%p), cp=%i, ChStat:%s, GrpStat:%s\n",
1611 __func__, dev->name, ch->id, ch, smp_processor_id(),
1612 fsm_getstate_str(ch->fsm), fsm_getstate_str(grp->fsm));
1614 switch (fsm_getstate(grp->fsm)) {
1615 case MPCG_STATE_XID2INITW:
1616 /* ok..start yside xid exchanges */
1617 if (!ch->in_mpcgroup)
1619 if (fsm_getstate(ch->fsm) == CH_XID0_PENDING) {
1620 fsm_deltimer(&grp->timer);
1621 fsm_addtimer(&grp->timer,
1622 MPC_XID_TIMEOUT_VALUE,
1623 MPCG_EVENT_TIMER, dev);
1624 fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch);
1626 } else if (fsm_getstate(ch->fsm) < CH_XID7_PENDING1)
1627 /* attn rcvd before xid0 processed via bh */
1628 fsm_newstate(ch->fsm, CH_XID7_PENDING1);
1630 case MPCG_STATE_XID2INITX:
1631 case MPCG_STATE_XID0IOWAIT:
1632 case MPCG_STATE_XID0IOWAIX:
1633 /* attn rcvd before xid0 processed on ch
1634 but mid-xid0 processing for group */
1635 if (fsm_getstate(ch->fsm) < CH_XID7_PENDING1)
1636 fsm_newstate(ch->fsm, CH_XID7_PENDING1);
1638 case MPCG_STATE_XID7INITW:
1639 case MPCG_STATE_XID7INITX:
1640 case MPCG_STATE_XID7INITI:
1641 case MPCG_STATE_XID7INITZ:
1642 switch (fsm_getstate(ch->fsm)) {
1643 case CH_XID7_PENDING:
1644 fsm_newstate(ch->fsm, CH_XID7_PENDING1);
1646 case CH_XID7_PENDING2:
1647 fsm_newstate(ch->fsm, CH_XID7_PENDING3);
1650 fsm_event(grp->fsm, MPCG_EVENT_XID7DONE, dev);
1658 * ctcmpc channel FSM action
1659 * called from one point in ctcmpc_ch_fsm
1662 static void ctcmpc_chx_attnbusy(fsm_instance *fsm, int event, void *arg)
1664 struct channel *ch = arg;
1665 struct net_device *dev = ch->netdev;
1666 struct ctcm_priv *priv = dev->ml_priv;
1667 struct mpc_group *grp = priv->mpcg;
1669 CTCM_PR_DEBUG("%s(%s): %s\n ChState:%s GrpState:%s\n",
1670 __func__, dev->name, ch->id,
1671 fsm_getstate_str(ch->fsm), fsm_getstate_str(grp->fsm));
1673 fsm_deltimer(&ch->timer);
1675 switch (fsm_getstate(grp->fsm)) {
1676 case MPCG_STATE_XID0IOWAIT:
1677 /* vtam wants to be primary.start yside xid exchanges*/
1678 /* only receive one attn-busy at a time so must not */
1679 /* change state each time */
1680 grp->changed_side = 1;
1681 fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW);
1683 case MPCG_STATE_XID2INITW:
1684 if (grp->changed_side == 1) {
1685 grp->changed_side = 2;
1688 /* process began via call to establish_conn */
1689 /* so must report failure instead of reverting */
1690 /* back to ready-for-xid passive state */
1691 if (grp->estconnfunc)
1693 /* this attnbusy is NOT the result of xside xid */
1694 /* collisions so yside must have been triggered */
1695 /* by an ATTN that was not intended to start XID */
1696 /* processing. Revert back to ready-for-xid and */
1697 /* wait for ATTN interrupt to signal xid start */
1698 if (fsm_getstate(ch->fsm) == CH_XID0_INPROGRESS) {
1699 fsm_newstate(ch->fsm, CH_XID0_PENDING) ;
1700 fsm_deltimer(&grp->timer);
1703 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1705 case MPCG_STATE_XID2INITX:
1706 /* XID2 was received before ATTN Busy for second
1707 channel.Send yside xid for second channel.
1709 if (grp->changed_side == 1) {
1710 grp->changed_side = 2;
1713 case MPCG_STATE_XID0IOWAIX:
1714 case MPCG_STATE_XID7INITW:
1715 case MPCG_STATE_XID7INITX:
1716 case MPCG_STATE_XID7INITI:
1717 case MPCG_STATE_XID7INITZ:
1719 /* multiple attn-busy indicates too out-of-sync */
1720 /* and they are certainly not being received as part */
1721 /* of valid mpc group negotiations.. */
1722 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1726 if (grp->changed_side == 1) {
1727 fsm_deltimer(&grp->timer);
1728 fsm_addtimer(&grp->timer, MPC_XID_TIMEOUT_VALUE,
1729 MPCG_EVENT_TIMER, dev);
1731 if (ch->in_mpcgroup)
1732 fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch);
1734 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1735 "%s(%s): channel %s not added to group",
1736 CTCM_FUNTAIL, dev->name, ch->id);
1743 * ctcmpc channel FSM action
1744 * called from several points in ctcmpc_ch_fsm
1747 static void ctcmpc_chx_resend(fsm_instance *fsm, int event, void *arg)
1749 struct channel *ch = arg;
1750 struct net_device *dev = ch->netdev;
1751 struct ctcm_priv *priv = dev->ml_priv;
1752 struct mpc_group *grp = priv->mpcg;
1754 fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch);
1759 * ctcmpc channel FSM action
1760 * called from several points in ctcmpc_ch_fsm
1763 static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg)
1765 struct channel *ach = arg;
1766 struct net_device *dev = ach->netdev;
1767 struct ctcm_priv *priv = dev->ml_priv;
1768 struct mpc_group *grp = priv->mpcg;
1769 struct channel *wch = priv->channel[CTCM_WRITE];
1770 struct channel *rch = priv->channel[CTCM_READ];
1771 struct sk_buff *skb;
1772 struct th_sweep *header;
1774 unsigned long saveflags = 0;
1776 CTCM_PR_DEBUG("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s\n",
1777 __func__, smp_processor_id(), ach, ach->id);
1779 if (grp->in_sweep == 0)
1782 CTCM_PR_DBGDATA("%s: 1: ToVTAM_th_seq= %08x\n" ,
1783 __func__, wch->th_seq_num);
1784 CTCM_PR_DBGDATA("%s: 1: FromVTAM_th_seq= %08x\n" ,
1785 __func__, rch->th_seq_num);
1787 if (fsm_getstate(wch->fsm) != CTC_STATE_TXIDLE) {
1788 /* give the previous IO time to complete */
1789 fsm_addtimer(&wch->sweep_timer,
1790 200, CTC_EVENT_RSWEEP_TIMER, wch);
1794 skb = skb_dequeue(&wch->sweep_queue);
1798 if (set_normalized_cda(&wch->ccw[4], skb->data)) {
1800 ctcm_clear_busy_do(dev);
1801 dev_kfree_skb_any(skb);
1802 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1805 atomic_inc(&skb->users);
1806 skb_queue_tail(&wch->io_queue, skb);
1809 /* send out the sweep */
1810 wch->ccw[4].count = skb->len;
1812 header = (struct th_sweep *)skb->data;
1813 switch (header->th.th_ch_flag) {
1815 grp->sweep_req_pend_num--;
1818 grp->sweep_rsp_pend_num--;
1822 header->sw.th_last_seq = wch->th_seq_num;
1824 CTCM_CCW_DUMP((char *)&wch->ccw[3], sizeof(struct ccw1) * 3);
1825 CTCM_PR_DBGDATA("%s: sweep packet\n", __func__);
1826 CTCM_D3_DUMP((char *)header, TH_SWEEP_LENGTH);
1828 fsm_addtimer(&wch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, wch);
1829 fsm_newstate(wch->fsm, CTC_STATE_TX);
1831 spin_lock_irqsave(get_ccwdev_lock(wch->cdev), saveflags);
1832 wch->prof.send_stamp = current_kernel_time(); /* xtime */
1833 rc = ccw_device_start(wch->cdev, &wch->ccw[3],
1834 (unsigned long) wch, 0xff, 0);
1835 spin_unlock_irqrestore(get_ccwdev_lock(wch->cdev), saveflags);
1837 if ((grp->sweep_req_pend_num == 0) &&
1838 (grp->sweep_rsp_pend_num == 0)) {
1840 rch->th_seq_num = 0x00;
1841 wch->th_seq_num = 0x00;
1842 ctcm_clear_busy_do(dev);
1845 CTCM_PR_DBGDATA("%s: To-/From-VTAM_th_seq = %08x/%08x\n" ,
1846 __func__, wch->th_seq_num, rch->th_seq_num);
1849 ctcm_ccw_check_rc(wch, rc, "send sweep");
1857 * The ctcmpc statemachine for a channel.
1860 const fsm_node ctcmpc_ch_fsm[] = {
1861 { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop },
1862 { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start },
1863 { CTC_STATE_STOPPED, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1864 { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop },
1865 { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop },
1867 { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop },
1868 { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop },
1869 { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop },
1870 { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop },
1871 { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start },
1872 { CTC_STATE_NOTOP, CTC_EVENT_UC_RCRESET, ctcm_chx_stop },
1873 { CTC_STATE_NOTOP, CTC_EVENT_UC_RSRESET, ctcm_chx_stop },
1874 { CTC_STATE_NOTOP, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1876 { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1877 { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop },
1878 { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
1879 { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr },
1880 { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1881 { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1883 { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio },
1884 { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode },
1885 { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
1886 { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1887 { CTC_STATE_STARTRETRY, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1889 { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1890 { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop },
1891 { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio },
1892 { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1893 { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1894 { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode },
1895 { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1896 { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1898 { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1899 { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop },
1900 { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, ctcmpc_chx_rxidle },
1901 { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr },
1902 { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr },
1903 { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr },
1904 { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail },
1905 { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1906 { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, ctcmpc_chx_firstio },
1907 { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1909 { CH_XID0_PENDING, CTC_EVENT_FINSTAT, ctcm_action_nop },
1910 { CH_XID0_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1911 { CH_XID0_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio },
1912 { CH_XID0_PENDING, CTC_EVENT_START, ctcm_action_nop },
1913 { CH_XID0_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1914 { CH_XID0_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1915 { CH_XID0_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1916 { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1917 { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1918 { CH_XID0_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
1920 { CH_XID0_INPROGRESS, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1921 { CH_XID0_INPROGRESS, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1922 { CH_XID0_INPROGRESS, CTC_EVENT_STOP, ctcm_chx_haltio },
1923 { CH_XID0_INPROGRESS, CTC_EVENT_START, ctcm_action_nop },
1924 { CH_XID0_INPROGRESS, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1925 { CH_XID0_INPROGRESS, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1926 { CH_XID0_INPROGRESS, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1927 { CH_XID0_INPROGRESS, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1928 { CH_XID0_INPROGRESS, CTC_EVENT_ATTNBUSY, ctcmpc_chx_attnbusy },
1929 { CH_XID0_INPROGRESS, CTC_EVENT_TIMER, ctcmpc_chx_resend },
1930 { CH_XID0_INPROGRESS, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
1932 { CH_XID7_PENDING, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1933 { CH_XID7_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1934 { CH_XID7_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio },
1935 { CH_XID7_PENDING, CTC_EVENT_START, ctcm_action_nop },
1936 { CH_XID7_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1937 { CH_XID7_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1938 { CH_XID7_PENDING, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1939 { CH_XID7_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1940 { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1941 { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1942 { CH_XID7_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
1943 { CH_XID7_PENDING, CTC_EVENT_TIMER, ctcmpc_chx_resend },
1944 { CH_XID7_PENDING, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
1946 { CH_XID7_PENDING1, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1947 { CH_XID7_PENDING1, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1948 { CH_XID7_PENDING1, CTC_EVENT_STOP, ctcm_chx_haltio },
1949 { CH_XID7_PENDING1, CTC_EVENT_START, ctcm_action_nop },
1950 { CH_XID7_PENDING1, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1951 { CH_XID7_PENDING1, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1952 { CH_XID7_PENDING1, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1953 { CH_XID7_PENDING1, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1954 { CH_XID7_PENDING1, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1955 { CH_XID7_PENDING1, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
1956 { CH_XID7_PENDING1, CTC_EVENT_TIMER, ctcmpc_chx_resend },
1957 { CH_XID7_PENDING1, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
1959 { CH_XID7_PENDING2, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1960 { CH_XID7_PENDING2, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1961 { CH_XID7_PENDING2, CTC_EVENT_STOP, ctcm_chx_haltio },
1962 { CH_XID7_PENDING2, CTC_EVENT_START, ctcm_action_nop },
1963 { CH_XID7_PENDING2, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1964 { CH_XID7_PENDING2, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1965 { CH_XID7_PENDING2, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1966 { CH_XID7_PENDING2, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1967 { CH_XID7_PENDING2, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1968 { CH_XID7_PENDING2, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
1969 { CH_XID7_PENDING2, CTC_EVENT_TIMER, ctcmpc_chx_resend },
1970 { CH_XID7_PENDING2, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
1972 { CH_XID7_PENDING3, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1973 { CH_XID7_PENDING3, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1974 { CH_XID7_PENDING3, CTC_EVENT_STOP, ctcm_chx_haltio },
1975 { CH_XID7_PENDING3, CTC_EVENT_START, ctcm_action_nop },
1976 { CH_XID7_PENDING3, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1977 { CH_XID7_PENDING3, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1978 { CH_XID7_PENDING3, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1979 { CH_XID7_PENDING3, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1980 { CH_XID7_PENDING3, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1981 { CH_XID7_PENDING3, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
1982 { CH_XID7_PENDING3, CTC_EVENT_TIMER, ctcmpc_chx_resend },
1983 { CH_XID7_PENDING3, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
1985 { CH_XID7_PENDING4, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1986 { CH_XID7_PENDING4, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1987 { CH_XID7_PENDING4, CTC_EVENT_STOP, ctcm_chx_haltio },
1988 { CH_XID7_PENDING4, CTC_EVENT_START, ctcm_action_nop },
1989 { CH_XID7_PENDING4, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1990 { CH_XID7_PENDING4, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1991 { CH_XID7_PENDING4, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1992 { CH_XID7_PENDING4, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1993 { CH_XID7_PENDING4, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1994 { CH_XID7_PENDING4, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
1995 { CH_XID7_PENDING4, CTC_EVENT_TIMER, ctcmpc_chx_resend },
1996 { CH_XID7_PENDING4, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
1998 { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio },
1999 { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop },
2000 { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
2001 { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc },
2002 { CTC_STATE_RXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail },
2003 { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
2004 { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2005 { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
2007 { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio },
2008 { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop },
2009 { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle },
2010 { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr },
2011 { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr },
2012 { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr },
2013 { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
2014 { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2015 { CTC_STATE_TXINIT, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep },
2017 { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio },
2018 { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop },
2019 { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio },
2020 { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_fail },
2021 { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail },
2022 { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
2023 { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2024 { CTC_STATE_TXIDLE, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep },
2026 { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop },
2027 { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart },
2028 { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped },
2029 { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
2030 { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
2031 { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2032 { CTC_STATE_TERM, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
2033 { CTC_STATE_TERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
2035 { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio },
2036 { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart },
2037 { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
2038 { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
2039 { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
2040 { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2041 { CTC_STATE_DTERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
2043 { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio },
2044 { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop },
2045 { CTC_STATE_TX, CTC_EVENT_FINSTAT, ctcmpc_chx_txdone },
2046 { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_fail },
2047 { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_fail },
2048 { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry },
2049 { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
2050 { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2051 { CTC_STATE_TX, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep },
2052 { CTC_STATE_TX, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
2054 { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio },
2055 { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio },
2056 { CTC_STATE_TXERR, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
2057 { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2058 { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2061 int mpc_ch_fsm_len = ARRAY_SIZE(ctcmpc_ch_fsm);
2064 * Actions for interface - statemachine.
2068 * Startup channels by sending CTC_EVENT_START to each channel.
2070 * fi An instance of an interface statemachine.
2071 * event The event, just happened.
2072 * arg Generic pointer, casted from struct net_device * upon call.
2074 static void dev_action_start(fsm_instance *fi, int event, void *arg)
2076 struct net_device *dev = arg;
2077 struct ctcm_priv *priv = dev->ml_priv;
2080 CTCMY_DBF_DEV_NAME(SETUP, dev, "");
2082 fsm_deltimer(&priv->restart_timer);
2083 fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX);
2085 priv->mpcg->channels_terminating = 0;
2086 for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) {
2087 struct channel *ch = priv->channel[direction];
2088 fsm_event(ch->fsm, CTC_EVENT_START, ch);
2093 * Shutdown channels by sending CTC_EVENT_STOP to each channel.
2095 * fi An instance of an interface statemachine.
2096 * event The event, just happened.
2097 * arg Generic pointer, casted from struct net_device * upon call.
2099 static void dev_action_stop(fsm_instance *fi, int event, void *arg)
2102 struct net_device *dev = arg;
2103 struct ctcm_priv *priv = dev->ml_priv;
2105 CTCMY_DBF_DEV_NAME(SETUP, dev, "");
2107 fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX);
2108 for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) {
2109 struct channel *ch = priv->channel[direction];
2110 fsm_event(ch->fsm, CTC_EVENT_STOP, ch);
2111 ch->th_seq_num = 0x00;
2112 CTCM_PR_DEBUG("%s: CH_th_seq= %08x\n",
2113 __func__, ch->th_seq_num);
2116 fsm_newstate(priv->mpcg->fsm, MPCG_STATE_RESET);
2119 static void dev_action_restart(fsm_instance *fi, int event, void *arg)
2122 struct net_device *dev = arg;
2123 struct ctcm_priv *priv = dev->ml_priv;
2125 CTCMY_DBF_DEV_NAME(TRACE, dev, "");
2128 restart_timer = CTCM_TIME_1_SEC;
2130 restart_timer = CTCM_TIME_5_SEC;
2132 dev_info(&dev->dev, "Restarting device\n");
2134 dev_action_stop(fi, event, arg);
2135 fsm_event(priv->fsm, DEV_EVENT_STOP, dev);
2137 fsm_newstate(priv->mpcg->fsm, MPCG_STATE_RESET);
2139 /* going back into start sequence too quickly can */
2140 /* result in the other side becoming unreachable due */
2141 /* to sense reported when IO is aborted */
2142 fsm_addtimer(&priv->restart_timer, restart_timer,
2143 DEV_EVENT_START, dev);
2147 * Called from channel statemachine
2148 * when a channel is up and running.
2150 * fi An instance of an interface statemachine.
2151 * event The event, just happened.
2152 * arg Generic pointer, casted from struct net_device * upon call.
2154 static void dev_action_chup(fsm_instance *fi, int event, void *arg)
2156 struct net_device *dev = arg;
2157 struct ctcm_priv *priv = dev->ml_priv;
2158 int dev_stat = fsm_getstate(fi);
2160 CTCM_DBF_TEXT_(SETUP, CTC_DBF_NOTICE,
2161 "%s(%s): priv = %p [%d,%d]\n ", CTCM_FUNTAIL,
2162 dev->name, dev->ml_priv, dev_stat, event);
2164 switch (fsm_getstate(fi)) {
2165 case DEV_STATE_STARTWAIT_RXTX:
2166 if (event == DEV_EVENT_RXUP)
2167 fsm_newstate(fi, DEV_STATE_STARTWAIT_TX);
2169 fsm_newstate(fi, DEV_STATE_STARTWAIT_RX);
2171 case DEV_STATE_STARTWAIT_RX:
2172 if (event == DEV_EVENT_RXUP) {
2173 fsm_newstate(fi, DEV_STATE_RUNNING);
2175 "Connected with remote side\n");
2176 ctcm_clear_busy(dev);
2179 case DEV_STATE_STARTWAIT_TX:
2180 if (event == DEV_EVENT_TXUP) {
2181 fsm_newstate(fi, DEV_STATE_RUNNING);
2183 "Connected with remote side\n");
2184 ctcm_clear_busy(dev);
2187 case DEV_STATE_STOPWAIT_TX:
2188 if (event == DEV_EVENT_RXUP)
2189 fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX);
2191 case DEV_STATE_STOPWAIT_RX:
2192 if (event == DEV_EVENT_TXUP)
2193 fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX);
2198 if (event == DEV_EVENT_RXUP)
2199 mpc_channel_action(priv->channel[CTCM_READ],
2200 CTCM_READ, MPC_CHANNEL_ADD);
2202 mpc_channel_action(priv->channel[CTCM_WRITE],
2203 CTCM_WRITE, MPC_CHANNEL_ADD);
2208 * Called from device statemachine
2209 * when a channel has been shutdown.
2211 * fi An instance of an interface statemachine.
2212 * event The event, just happened.
2213 * arg Generic pointer, casted from struct net_device * upon call.
2215 static void dev_action_chdown(fsm_instance *fi, int event, void *arg)
2218 struct net_device *dev = arg;
2219 struct ctcm_priv *priv = dev->ml_priv;
2221 CTCMY_DBF_DEV_NAME(SETUP, dev, "");
2223 switch (fsm_getstate(fi)) {
2224 case DEV_STATE_RUNNING:
2225 if (event == DEV_EVENT_TXDOWN)
2226 fsm_newstate(fi, DEV_STATE_STARTWAIT_TX);
2228 fsm_newstate(fi, DEV_STATE_STARTWAIT_RX);
2230 case DEV_STATE_STARTWAIT_RX:
2231 if (event == DEV_EVENT_TXDOWN)
2232 fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX);
2234 case DEV_STATE_STARTWAIT_TX:
2235 if (event == DEV_EVENT_RXDOWN)
2236 fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX);
2238 case DEV_STATE_STOPWAIT_RXTX:
2239 if (event == DEV_EVENT_TXDOWN)
2240 fsm_newstate(fi, DEV_STATE_STOPWAIT_RX);
2242 fsm_newstate(fi, DEV_STATE_STOPWAIT_TX);
2244 case DEV_STATE_STOPWAIT_RX:
2245 if (event == DEV_EVENT_RXDOWN)
2246 fsm_newstate(fi, DEV_STATE_STOPPED);
2248 case DEV_STATE_STOPWAIT_TX:
2249 if (event == DEV_EVENT_TXDOWN)
2250 fsm_newstate(fi, DEV_STATE_STOPPED);
2254 if (event == DEV_EVENT_RXDOWN)
2255 mpc_channel_action(priv->channel[CTCM_READ],
2256 CTCM_READ, MPC_CHANNEL_REMOVE);
2258 mpc_channel_action(priv->channel[CTCM_WRITE],
2259 CTCM_WRITE, MPC_CHANNEL_REMOVE);
2263 const fsm_node dev_fsm[] = {
2264 { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start },
2265 { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_START, dev_action_start },
2266 { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown },
2267 { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown },
2268 { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart },
2269 { DEV_STATE_STOPWAIT_RX, DEV_EVENT_START, dev_action_start },
2270 { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXUP, dev_action_chup },
2271 { DEV_STATE_STOPWAIT_RX, DEV_EVENT_TXUP, dev_action_chup },
2272 { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXDOWN, dev_action_chdown },
2273 { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RESTART, dev_action_restart },
2274 { DEV_STATE_STOPWAIT_TX, DEV_EVENT_START, dev_action_start },
2275 { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RXUP, dev_action_chup },
2276 { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXUP, dev_action_chup },
2277 { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXDOWN, dev_action_chdown },
2278 { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RESTART, dev_action_restart },
2279 { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_STOP, dev_action_stop },
2280 { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXUP, dev_action_chup },
2281 { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXUP, dev_action_chup },
2282 { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown },
2283 { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown },
2284 { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart },
2285 { DEV_STATE_STARTWAIT_TX, DEV_EVENT_STOP, dev_action_stop },
2286 { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXUP, dev_action_chup },
2287 { DEV_STATE_STARTWAIT_TX, DEV_EVENT_TXUP, dev_action_chup },
2288 { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXDOWN, dev_action_chdown },
2289 { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RESTART, dev_action_restart },
2290 { DEV_STATE_STARTWAIT_RX, DEV_EVENT_STOP, dev_action_stop },
2291 { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RXUP, dev_action_chup },
2292 { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXUP, dev_action_chup },
2293 { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXDOWN, dev_action_chdown },
2294 { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RESTART, dev_action_restart },
2295 { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop },
2296 { DEV_STATE_RUNNING, DEV_EVENT_RXDOWN, dev_action_chdown },
2297 { DEV_STATE_RUNNING, DEV_EVENT_TXDOWN, dev_action_chdown },
2298 { DEV_STATE_RUNNING, DEV_EVENT_TXUP, ctcm_action_nop },
2299 { DEV_STATE_RUNNING, DEV_EVENT_RXUP, ctcm_action_nop },
2300 { DEV_STATE_RUNNING, DEV_EVENT_RESTART, dev_action_restart },
2303 int dev_fsm_len = ARRAY_SIZE(dev_fsm);
2305 /* --- This is the END my friend --- */