2 * Copyright IBM Corp. 2001, 2007
3 * Authors: Fritz Elfert (felfert@millenux.com)
4 * Peter Tiedemann (ptiedem@de.ibm.com)
6 * Belinda Thompson (belindat@us.ibm.com)
7 * Andy Richter (richtera@us.ibm.com)
14 #define KMSG_COMPONENT "ctcm"
15 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/kernel.h>
20 #include <linux/slab.h>
21 #include <linux/errno.h>
22 #include <linux/types.h>
23 #include <linux/interrupt.h>
24 #include <linux/timer.h>
25 #include <linux/bitops.h>
27 #include <linux/signal.h>
28 #include <linux/string.h>
31 #include <linux/if_arp.h>
32 #include <linux/tcp.h>
33 #include <linux/skbuff.h>
34 #include <linux/ctype.h>
38 #include <asm/ccwdev.h>
39 #include <asm/ccwgroup.h>
40 #include <linux/uaccess.h>
42 #include <asm/idals.h>
46 #include "ctcm_dbug.h"
47 #include "ctcm_main.h"
48 #include "ctcm_fsms.h"
50 const char *dev_state_names[] = {
51 [DEV_STATE_STOPPED] = "Stopped",
52 [DEV_STATE_STARTWAIT_RXTX] = "StartWait RXTX",
53 [DEV_STATE_STARTWAIT_RX] = "StartWait RX",
54 [DEV_STATE_STARTWAIT_TX] = "StartWait TX",
55 [DEV_STATE_STOPWAIT_RXTX] = "StopWait RXTX",
56 [DEV_STATE_STOPWAIT_RX] = "StopWait RX",
57 [DEV_STATE_STOPWAIT_TX] = "StopWait TX",
58 [DEV_STATE_RUNNING] = "Running",
61 const char *dev_event_names[] = {
62 [DEV_EVENT_START] = "Start",
63 [DEV_EVENT_STOP] = "Stop",
64 [DEV_EVENT_RXUP] = "RX up",
65 [DEV_EVENT_TXUP] = "TX up",
66 [DEV_EVENT_RXDOWN] = "RX down",
67 [DEV_EVENT_TXDOWN] = "TX down",
68 [DEV_EVENT_RESTART] = "Restart",
71 const char *ctc_ch_event_names[] = {
72 [CTC_EVENT_IO_SUCCESS] = "ccw_device success",
73 [CTC_EVENT_IO_EBUSY] = "ccw_device busy",
74 [CTC_EVENT_IO_ENODEV] = "ccw_device enodev",
75 [CTC_EVENT_IO_UNKNOWN] = "ccw_device unknown",
76 [CTC_EVENT_ATTNBUSY] = "Status ATTN & BUSY",
77 [CTC_EVENT_ATTN] = "Status ATTN",
78 [CTC_EVENT_BUSY] = "Status BUSY",
79 [CTC_EVENT_UC_RCRESET] = "Unit check remote reset",
80 [CTC_EVENT_UC_RSRESET] = "Unit check remote system reset",
81 [CTC_EVENT_UC_TXTIMEOUT] = "Unit check TX timeout",
82 [CTC_EVENT_UC_TXPARITY] = "Unit check TX parity",
83 [CTC_EVENT_UC_HWFAIL] = "Unit check Hardware failure",
84 [CTC_EVENT_UC_RXPARITY] = "Unit check RX parity",
85 [CTC_EVENT_UC_ZERO] = "Unit check ZERO",
86 [CTC_EVENT_UC_UNKNOWN] = "Unit check Unknown",
87 [CTC_EVENT_SC_UNKNOWN] = "SubChannel check Unknown",
88 [CTC_EVENT_MC_FAIL] = "Machine check failure",
89 [CTC_EVENT_MC_GOOD] = "Machine check operational",
90 [CTC_EVENT_IRQ] = "IRQ normal",
91 [CTC_EVENT_FINSTAT] = "IRQ final",
92 [CTC_EVENT_TIMER] = "Timer",
93 [CTC_EVENT_START] = "Start",
94 [CTC_EVENT_STOP] = "Stop",
96 * additional MPC events
98 [CTC_EVENT_SEND_XID] = "XID Exchange",
99 [CTC_EVENT_RSWEEP_TIMER] = "MPC Group Sweep Timer",
102 const char *ctc_ch_state_names[] = {
103 [CTC_STATE_IDLE] = "Idle",
104 [CTC_STATE_STOPPED] = "Stopped",
105 [CTC_STATE_STARTWAIT] = "StartWait",
106 [CTC_STATE_STARTRETRY] = "StartRetry",
107 [CTC_STATE_SETUPWAIT] = "SetupWait",
108 [CTC_STATE_RXINIT] = "RX init",
109 [CTC_STATE_TXINIT] = "TX init",
110 [CTC_STATE_RX] = "RX",
111 [CTC_STATE_TX] = "TX",
112 [CTC_STATE_RXIDLE] = "RX idle",
113 [CTC_STATE_TXIDLE] = "TX idle",
114 [CTC_STATE_RXERR] = "RX error",
115 [CTC_STATE_TXERR] = "TX error",
116 [CTC_STATE_TERM] = "Terminating",
117 [CTC_STATE_DTERM] = "Restarting",
118 [CTC_STATE_NOTOP] = "Not operational",
120 * additional MPC states
122 [CH_XID0_PENDING] = "Pending XID0 Start",
123 [CH_XID0_INPROGRESS] = "In XID0 Negotiations ",
124 [CH_XID7_PENDING] = "Pending XID7 P1 Start",
125 [CH_XID7_PENDING1] = "Active XID7 P1 Exchange ",
126 [CH_XID7_PENDING2] = "Pending XID7 P2 Start ",
127 [CH_XID7_PENDING3] = "Active XID7 P2 Exchange ",
128 [CH_XID7_PENDING4] = "XID7 Complete - Pending READY ",
131 static void ctcm_action_nop(fsm_instance *fi, int event, void *arg);
134 * ----- static ctcm actions for channel statemachine -----
137 static void chx_txdone(fsm_instance *fi, int event, void *arg);
138 static void chx_rx(fsm_instance *fi, int event, void *arg);
139 static void chx_rxidle(fsm_instance *fi, int event, void *arg);
140 static void chx_firstio(fsm_instance *fi, int event, void *arg);
141 static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg);
142 static void ctcm_chx_start(fsm_instance *fi, int event, void *arg);
143 static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg);
144 static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg);
145 static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg);
146 static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg);
147 static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg);
148 static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg);
149 static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg);
150 static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg);
151 static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg);
152 static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg);
153 static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg);
154 static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg);
157 * ----- static ctcmpc actions for ctcmpc channel statemachine -----
160 static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg);
161 static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg);
162 static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg);
164 static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg);
165 static void ctcm_chx_start(fsm_instance *fi, int event, void *arg);
166 static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg);
167 static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg);
168 static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg);
169 static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg);
170 static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg);
171 static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg);
172 static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg);
173 static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg);
174 static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg);
175 static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg);
176 static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg);
177 static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg);
179 static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg);
180 static void ctcmpc_chx_attnbusy(fsm_instance *, int, void *);
181 static void ctcmpc_chx_resend(fsm_instance *, int, void *);
182 static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg);
185 * Check return code of a preceding ccw_device call, halt_IO etc...
187 * ch : The channel, the error belongs to.
188 * Returns the error code (!= 0) to inspect.
190 void ctcm_ccw_check_rc(struct channel *ch, int rc, char *msg)
192 CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR,
193 "%s(%s): %s: %04x\n",
194 CTCM_FUNTAIL, ch->id, msg, rc);
197 pr_info("%s: The communication peer is busy\n",
199 fsm_event(ch->fsm, CTC_EVENT_IO_EBUSY, ch);
202 pr_err("%s: The specified target device is not valid\n",
204 fsm_event(ch->fsm, CTC_EVENT_IO_ENODEV, ch);
207 pr_err("An I/O operation resulted in error %04x\n",
209 fsm_event(ch->fsm, CTC_EVENT_IO_UNKNOWN, ch);
213 void ctcm_purge_skb_queue(struct sk_buff_head *q)
217 CTCM_DBF_TEXT(TRACE, CTC_DBF_DEBUG, __func__);
219 while ((skb = skb_dequeue(q))) {
220 atomic_dec(&skb->users);
221 dev_kfree_skb_any(skb);
226 * NOP action for statemachines
228 static void ctcm_action_nop(fsm_instance *fi, int event, void *arg)
233 * Actions for channel - statemachines.
237 * Normal data has been send. Free the corresponding
238 * skb (it's in io_queue), reset dev->tbusy and
239 * revert to idle state.
241 * fi An instance of a channel statemachine.
242 * event The event, just happened.
243 * arg Generic pointer, casted from channel * upon call.
245 static void chx_txdone(fsm_instance *fi, int event, void *arg)
247 struct channel *ch = arg;
248 struct net_device *dev = ch->netdev;
249 struct ctcm_priv *priv = dev->ml_priv;
253 unsigned long duration;
254 unsigned long done_stamp = jiffies;
256 CTCM_PR_DEBUG("%s(%s): %s\n", __func__, ch->id, dev->name);
258 duration = done_stamp - ch->prof.send_stamp;
259 if (duration > ch->prof.tx_time)
260 ch->prof.tx_time = duration;
262 if (ch->irb->scsw.cmd.count != 0)
263 CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG,
264 "%s(%s): TX not complete, remaining %d bytes",
265 CTCM_FUNTAIL, dev->name, ch->irb->scsw.cmd.count);
266 fsm_deltimer(&ch->timer);
267 while ((skb = skb_dequeue(&ch->io_queue))) {
268 priv->stats.tx_packets++;
269 priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH;
271 priv->stats.tx_bytes += 2;
274 atomic_dec(&skb->users);
275 dev_kfree_skb_irq(skb);
277 spin_lock(&ch->collect_lock);
278 clear_normalized_cda(&ch->ccw[4]);
279 if (ch->collect_len > 0) {
282 if (ctcm_checkalloc_buffer(ch)) {
283 spin_unlock(&ch->collect_lock);
286 ch->trans_skb->data = ch->trans_skb_data;
287 skb_reset_tail_pointer(ch->trans_skb);
288 ch->trans_skb->len = 0;
289 if (ch->prof.maxmulti < (ch->collect_len + 2))
290 ch->prof.maxmulti = ch->collect_len + 2;
291 if (ch->prof.maxcqueue < skb_queue_len(&ch->collect_queue))
292 ch->prof.maxcqueue = skb_queue_len(&ch->collect_queue);
293 *((__u16 *)skb_put(ch->trans_skb, 2)) = ch->collect_len + 2;
295 while ((skb = skb_dequeue(&ch->collect_queue))) {
296 skb_copy_from_linear_data(skb,
297 skb_put(ch->trans_skb, skb->len), skb->len);
298 priv->stats.tx_packets++;
299 priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH;
300 atomic_dec(&skb->users);
301 dev_kfree_skb_irq(skb);
305 spin_unlock(&ch->collect_lock);
306 ch->ccw[1].count = ch->trans_skb->len;
307 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
308 ch->prof.send_stamp = jiffies;
309 rc = ccw_device_start(ch->cdev, &ch->ccw[0],
310 (unsigned long)ch, 0xff, 0);
311 ch->prof.doios_multi++;
313 priv->stats.tx_dropped += i;
314 priv->stats.tx_errors += i;
315 fsm_deltimer(&ch->timer);
316 ctcm_ccw_check_rc(ch, rc, "chained TX");
319 spin_unlock(&ch->collect_lock);
320 fsm_newstate(fi, CTC_STATE_TXIDLE);
322 ctcm_clear_busy_do(dev);
326 * Initial data is sent.
327 * Notify device statemachine that we are up and
330 * fi An instance of a channel statemachine.
331 * event The event, just happened.
332 * arg Generic pointer, casted from channel * upon call.
334 void ctcm_chx_txidle(fsm_instance *fi, int event, void *arg)
336 struct channel *ch = arg;
337 struct net_device *dev = ch->netdev;
338 struct ctcm_priv *priv = dev->ml_priv;
340 CTCM_PR_DEBUG("%s(%s): %s\n", __func__, ch->id, dev->name);
342 fsm_deltimer(&ch->timer);
343 fsm_newstate(fi, CTC_STATE_TXIDLE);
344 fsm_event(priv->fsm, DEV_EVENT_TXUP, ch->netdev);
348 * Got normal data, check for sanity, queue it up, allocate new buffer
349 * trigger bottom half, and initiate next read.
351 * fi An instance of a channel statemachine.
352 * event The event, just happened.
353 * arg Generic pointer, casted from channel * upon call.
355 static void chx_rx(fsm_instance *fi, int event, void *arg)
357 struct channel *ch = arg;
358 struct net_device *dev = ch->netdev;
359 struct ctcm_priv *priv = dev->ml_priv;
360 int len = ch->max_bufsize - ch->irb->scsw.cmd.count;
361 struct sk_buff *skb = ch->trans_skb;
362 __u16 block_len = *((__u16 *)skb->data);
366 fsm_deltimer(&ch->timer);
368 CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE,
369 "%s(%s): got packet with length %d < 8\n",
370 CTCM_FUNTAIL, dev->name, len);
371 priv->stats.rx_dropped++;
372 priv->stats.rx_length_errors++;
375 if (len > ch->max_bufsize) {
376 CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE,
377 "%s(%s): got packet with length %d > %d\n",
378 CTCM_FUNTAIL, dev->name, len, ch->max_bufsize);
379 priv->stats.rx_dropped++;
380 priv->stats.rx_length_errors++;
385 * VM TCP seems to have a bug sending 2 trailing bytes of garbage.
387 switch (ch->protocol) {
388 case CTCM_PROTO_S390:
389 case CTCM_PROTO_OS390:
390 check_len = block_len + 2;
393 check_len = block_len;
396 if ((len < block_len) || (len > check_len)) {
397 CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE,
398 "%s(%s): got block length %d != rx length %d\n",
399 CTCM_FUNTAIL, dev->name, block_len, len);
401 ctcmpc_dump_skb(skb, 0);
403 *((__u16 *)skb->data) = len;
404 priv->stats.rx_dropped++;
405 priv->stats.rx_length_errors++;
409 *((__u16 *)skb->data) = block_len - 2;
410 ctcm_unpack_skb(ch, skb);
413 skb->data = ch->trans_skb_data;
414 skb_reset_tail_pointer(skb);
416 if (ctcm_checkalloc_buffer(ch))
418 ch->ccw[1].count = ch->max_bufsize;
419 rc = ccw_device_start(ch->cdev, &ch->ccw[0],
420 (unsigned long)ch, 0xff, 0);
422 ctcm_ccw_check_rc(ch, rc, "normal RX");
426 * Initialize connection by sending a __u16 of value 0.
428 * fi An instance of a channel statemachine.
429 * event The event, just happened.
430 * arg Generic pointer, casted from channel * upon call.
432 static void chx_firstio(fsm_instance *fi, int event, void *arg)
435 struct channel *ch = arg;
436 int fsmstate = fsm_getstate(fi);
438 CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE,
440 CTCM_FUNTAIL, ch->id, fsmstate);
442 ch->sense_rc = 0; /* reset unit check report control */
443 if (fsmstate == CTC_STATE_TXIDLE)
444 CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG,
445 "%s(%s): remote side issued READ?, init.\n",
446 CTCM_FUNTAIL, ch->id);
447 fsm_deltimer(&ch->timer);
448 if (ctcm_checkalloc_buffer(ch))
450 if ((fsmstate == CTC_STATE_SETUPWAIT) &&
451 (ch->protocol == CTCM_PROTO_OS390)) {
452 /* OS/390 resp. z/OS */
453 if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) {
454 *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN;
455 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC,
456 CTC_EVENT_TIMER, ch);
457 chx_rxidle(fi, event, arg);
459 struct net_device *dev = ch->netdev;
460 struct ctcm_priv *priv = dev->ml_priv;
461 fsm_newstate(fi, CTC_STATE_TXIDLE);
462 fsm_event(priv->fsm, DEV_EVENT_TXUP, dev);
467 * Don't setup a timer for receiving the initial RX frame
468 * if in compatibility mode, since VM TCP delays the initial
469 * frame until it has some data to send.
471 if ((CHANNEL_DIRECTION(ch->flags) == CTCM_WRITE) ||
472 (ch->protocol != CTCM_PROTO_S390))
473 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
475 *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN;
476 ch->ccw[1].count = 2; /* Transfer only length */
478 fsm_newstate(fi, (CHANNEL_DIRECTION(ch->flags) == CTCM_READ)
479 ? CTC_STATE_RXINIT : CTC_STATE_TXINIT);
480 rc = ccw_device_start(ch->cdev, &ch->ccw[0],
481 (unsigned long)ch, 0xff, 0);
483 fsm_deltimer(&ch->timer);
484 fsm_newstate(fi, CTC_STATE_SETUPWAIT);
485 ctcm_ccw_check_rc(ch, rc, "init IO");
488 * If in compatibility mode since we don't setup a timer, we
489 * also signal RX channel up immediately. This enables us
490 * to send packets early which in turn usually triggers some
491 * reply from VM TCP which brings up the RX channel to it's
494 if ((CHANNEL_DIRECTION(ch->flags) == CTCM_READ) &&
495 (ch->protocol == CTCM_PROTO_S390)) {
496 struct net_device *dev = ch->netdev;
497 struct ctcm_priv *priv = dev->ml_priv;
498 fsm_event(priv->fsm, DEV_EVENT_RXUP, dev);
503 * Got initial data, check it. If OK,
504 * notify device statemachine that we are up and
507 * fi An instance of a channel statemachine.
508 * event The event, just happened.
509 * arg Generic pointer, casted from channel * upon call.
511 static void chx_rxidle(fsm_instance *fi, int event, void *arg)
513 struct channel *ch = arg;
514 struct net_device *dev = ch->netdev;
515 struct ctcm_priv *priv = dev->ml_priv;
519 fsm_deltimer(&ch->timer);
520 buflen = *((__u16 *)ch->trans_skb->data);
521 CTCM_PR_DEBUG("%s: %s: Initial RX count = %d\n",
522 __func__, dev->name, buflen);
524 if (buflen >= CTCM_INITIAL_BLOCKLEN) {
525 if (ctcm_checkalloc_buffer(ch))
527 ch->ccw[1].count = ch->max_bufsize;
528 fsm_newstate(fi, CTC_STATE_RXIDLE);
529 rc = ccw_device_start(ch->cdev, &ch->ccw[0],
530 (unsigned long)ch, 0xff, 0);
532 fsm_newstate(fi, CTC_STATE_RXINIT);
533 ctcm_ccw_check_rc(ch, rc, "initial RX");
535 fsm_event(priv->fsm, DEV_EVENT_RXUP, dev);
537 CTCM_PR_DEBUG("%s: %s: Initial RX count %d not %d\n",
539 buflen, CTCM_INITIAL_BLOCKLEN);
540 chx_firstio(fi, event, arg);
545 * Set channel into extended mode.
547 * fi An instance of a channel statemachine.
548 * event The event, just happened.
549 * arg Generic pointer, casted from channel * upon call.
551 static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg)
553 struct channel *ch = arg;
555 unsigned long saveflags = 0;
556 int timeout = CTCM_TIME_5_SEC;
558 fsm_deltimer(&ch->timer);
561 CTCM_PR_DEBUG("enter %s: cp=%i ch=0x%p id=%s\n",
562 __func__, smp_processor_id(), ch, ch->id);
564 fsm_addtimer(&ch->timer, timeout, CTC_EVENT_TIMER, ch);
565 fsm_newstate(fi, CTC_STATE_SETUPWAIT);
566 CTCM_CCW_DUMP((char *)&ch->ccw[6], sizeof(struct ccw1) * 2);
568 if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */
569 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
570 /* Such conditional locking is undeterministic in
571 * static view. => ignore sparse warnings here. */
573 rc = ccw_device_start(ch->cdev, &ch->ccw[6],
574 (unsigned long)ch, 0xff, 0);
575 if (event == CTC_EVENT_TIMER) /* see above comments */
576 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
578 fsm_deltimer(&ch->timer);
579 fsm_newstate(fi, CTC_STATE_STARTWAIT);
580 ctcm_ccw_check_rc(ch, rc, "set Mode");
588 * fi An instance of a channel statemachine.
589 * event The event, just happened.
590 * arg Generic pointer, casted from channel * upon call.
592 static void ctcm_chx_start(fsm_instance *fi, int event, void *arg)
594 struct channel *ch = arg;
595 unsigned long saveflags;
598 CTCM_DBF_TEXT_(SETUP, CTC_DBF_INFO, "%s(%s): %s",
599 CTCM_FUNTAIL, ch->id,
600 (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? "RX" : "TX");
602 if (ch->trans_skb != NULL) {
603 clear_normalized_cda(&ch->ccw[1]);
604 dev_kfree_skb(ch->trans_skb);
605 ch->trans_skb = NULL;
607 if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) {
608 ch->ccw[1].cmd_code = CCW_CMD_READ;
609 ch->ccw[1].flags = CCW_FLAG_SLI;
610 ch->ccw[1].count = 0;
612 ch->ccw[1].cmd_code = CCW_CMD_WRITE;
613 ch->ccw[1].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
614 ch->ccw[1].count = 0;
616 if (ctcm_checkalloc_buffer(ch)) {
617 CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG,
618 "%s(%s): %s trans_skb alloc delayed "
619 "until first transfer",
620 CTCM_FUNTAIL, ch->id,
621 (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ?
624 ch->ccw[0].cmd_code = CCW_CMD_PREPARE;
625 ch->ccw[0].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
626 ch->ccw[0].count = 0;
628 ch->ccw[2].cmd_code = CCW_CMD_NOOP; /* jointed CE + DE */
629 ch->ccw[2].flags = CCW_FLAG_SLI;
630 ch->ccw[2].count = 0;
632 memcpy(&ch->ccw[3], &ch->ccw[0], sizeof(struct ccw1) * 3);
634 ch->ccw[4].flags &= ~CCW_FLAG_IDA;
636 fsm_newstate(fi, CTC_STATE_STARTWAIT);
637 fsm_addtimer(&ch->timer, 1000, CTC_EVENT_TIMER, ch);
638 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
639 rc = ccw_device_halt(ch->cdev, (unsigned long)ch);
640 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
643 fsm_deltimer(&ch->timer);
644 ctcm_ccw_check_rc(ch, rc, "initial HaltIO");
649 * Shutdown a channel.
651 * fi An instance of a channel statemachine.
652 * event The event, just happened.
653 * arg Generic pointer, casted from channel * upon call.
655 static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg)
657 struct channel *ch = arg;
658 unsigned long saveflags = 0;
662 fsm_deltimer(&ch->timer);
664 fsm_deltimer(&ch->sweep_timer);
666 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
668 if (event == CTC_EVENT_STOP) /* only for STOP not yet locked */
669 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
670 /* Such conditional locking is undeterministic in
671 * static view. => ignore sparse warnings here. */
672 oldstate = fsm_getstate(fi);
673 fsm_newstate(fi, CTC_STATE_TERM);
674 rc = ccw_device_halt(ch->cdev, (unsigned long)ch);
676 if (event == CTC_EVENT_STOP)
677 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
678 /* see remark above about conditional locking */
680 if (rc != 0 && rc != -EBUSY) {
681 fsm_deltimer(&ch->timer);
682 if (event != CTC_EVENT_STOP) {
683 fsm_newstate(fi, oldstate);
684 ctcm_ccw_check_rc(ch, rc, (char *)__func__);
690 * Cleanup helper for chx_fail and chx_stopped
691 * cleanup channels queue and notify interface statemachine.
693 * fi An instance of a channel statemachine.
694 * state The next state (depending on caller).
695 * ch The channel to operate on.
697 static void ctcm_chx_cleanup(fsm_instance *fi, int state,
700 struct net_device *dev = ch->netdev;
701 struct ctcm_priv *priv = dev->ml_priv;
703 CTCM_DBF_TEXT_(SETUP, CTC_DBF_NOTICE,
705 CTCM_FUNTAIL, dev->name, ch->id, state);
707 fsm_deltimer(&ch->timer);
709 fsm_deltimer(&ch->sweep_timer);
711 fsm_newstate(fi, state);
712 if (state == CTC_STATE_STOPPED && ch->trans_skb != NULL) {
713 clear_normalized_cda(&ch->ccw[1]);
714 dev_kfree_skb_any(ch->trans_skb);
715 ch->trans_skb = NULL;
719 ch->th_seq_num = 0x00;
720 if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) {
721 skb_queue_purge(&ch->io_queue);
722 fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
724 ctcm_purge_skb_queue(&ch->io_queue);
726 ctcm_purge_skb_queue(&ch->sweep_queue);
727 spin_lock(&ch->collect_lock);
728 ctcm_purge_skb_queue(&ch->collect_queue);
730 spin_unlock(&ch->collect_lock);
731 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
736 * A channel has successfully been halted.
737 * Cleanup it's queue and notify interface statemachine.
739 * fi An instance of a channel statemachine.
740 * event The event, just happened.
741 * arg Generic pointer, casted from channel * upon call.
743 static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg)
745 ctcm_chx_cleanup(fi, CTC_STATE_STOPPED, arg);
749 * A stop command from device statemachine arrived and we are in
750 * not operational mode. Set state to stopped.
752 * fi An instance of a channel statemachine.
753 * event The event, just happened.
754 * arg Generic pointer, casted from channel * upon call.
756 static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg)
758 fsm_newstate(fi, CTC_STATE_STOPPED);
762 * A machine check for no path, not operational status or gone device has
764 * Cleanup queue and notify interface statemachine.
766 * fi An instance of a channel statemachine.
767 * event The event, just happened.
768 * arg Generic pointer, casted from channel * upon call.
770 static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg)
772 ctcm_chx_cleanup(fi, CTC_STATE_NOTOP, arg);
776 * Handle error during setup of channel.
778 * fi An instance of a channel statemachine.
779 * event The event, just happened.
780 * arg Generic pointer, casted from channel * upon call.
782 static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg)
784 struct channel *ch = arg;
785 struct net_device *dev = ch->netdev;
786 struct ctcm_priv *priv = dev->ml_priv;
789 * Special case: Got UC_RCRESET on setmode.
790 * This means that remote side isn't setup. In this case
791 * simply retry after some 10 secs...
793 if ((fsm_getstate(fi) == CTC_STATE_SETUPWAIT) &&
794 ((event == CTC_EVENT_UC_RCRESET) ||
795 (event == CTC_EVENT_UC_RSRESET))) {
796 fsm_newstate(fi, CTC_STATE_STARTRETRY);
797 fsm_deltimer(&ch->timer);
798 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
800 (CHANNEL_DIRECTION(ch->flags) == CTCM_READ)) {
801 int rc = ccw_device_halt(ch->cdev, (unsigned long)ch);
803 ctcm_ccw_check_rc(ch, rc,
804 "HaltIO in chx_setuperr");
809 CTCM_DBF_TEXT_(ERROR, CTC_DBF_CRIT,
810 "%s(%s) : %s error during %s channel setup state=%s\n",
811 CTCM_FUNTAIL, dev->name, ctc_ch_event_names[event],
812 (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? "RX" : "TX",
813 fsm_getstate_str(fi));
815 if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) {
816 fsm_newstate(fi, CTC_STATE_RXERR);
817 fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
819 fsm_newstate(fi, CTC_STATE_TXERR);
820 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
825 * Restart a channel after an error.
827 * fi An instance of a channel statemachine.
828 * event The event, just happened.
829 * arg Generic pointer, casted from channel * upon call.
831 static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg)
833 struct channel *ch = arg;
834 struct net_device *dev = ch->netdev;
835 unsigned long saveflags = 0;
839 CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE,
840 "%s: %s[%d] of %s\n",
841 CTCM_FUNTAIL, ch->id, event, dev->name);
843 fsm_deltimer(&ch->timer);
845 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
846 oldstate = fsm_getstate(fi);
847 fsm_newstate(fi, CTC_STATE_STARTWAIT);
848 if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */
849 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
850 /* Such conditional locking is a known problem for
851 * sparse because its undeterministic in static view.
852 * Warnings should be ignored here. */
853 rc = ccw_device_halt(ch->cdev, (unsigned long)ch);
854 if (event == CTC_EVENT_TIMER)
855 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
858 fsm_deltimer(&ch->timer);
859 fsm_newstate(fi, oldstate);
861 ctcm_ccw_check_rc(ch, rc, "HaltIO in ctcm_chx_restart");
866 * Handle error during RX initial handshake (exchange of
867 * 0-length block header)
869 * fi An instance of a channel statemachine.
870 * event The event, just happened.
871 * arg Generic pointer, casted from channel * upon call.
873 static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg)
875 struct channel *ch = arg;
876 struct net_device *dev = ch->netdev;
877 struct ctcm_priv *priv = dev->ml_priv;
879 if (event == CTC_EVENT_TIMER) {
881 /* TODO : check if MPC deletes timer somewhere */
882 fsm_deltimer(&ch->timer);
884 ctcm_chx_restart(fi, event, arg);
886 fsm_newstate(fi, CTC_STATE_RXERR);
887 fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
890 CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR,
891 "%s(%s): %s in %s", CTCM_FUNTAIL, ch->id,
892 ctc_ch_event_names[event], fsm_getstate_str(fi));
895 "Initialization failed with RX/TX init handshake "
896 "error %s\n", ctc_ch_event_names[event]);
901 * Notify device statemachine if we gave up initialization
904 * fi An instance of a channel statemachine.
905 * event The event, just happened.
906 * arg Generic pointer, casted from channel * upon call.
908 static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg)
910 struct channel *ch = arg;
911 struct net_device *dev = ch->netdev;
912 struct ctcm_priv *priv = dev->ml_priv;
914 CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR,
915 "%s(%s): RX %s busy, init. fail",
916 CTCM_FUNTAIL, dev->name, ch->id);
917 fsm_newstate(fi, CTC_STATE_RXERR);
918 fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
922 * Handle RX Unit check remote reset (remote disconnected)
924 * fi An instance of a channel statemachine.
925 * event The event, just happened.
926 * arg Generic pointer, casted from channel * upon call.
928 static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg)
930 struct channel *ch = arg;
932 struct net_device *dev = ch->netdev;
933 struct ctcm_priv *priv = dev->ml_priv;
935 CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE,
936 "%s: %s: remote disconnect - re-init ...",
937 CTCM_FUNTAIL, dev->name);
938 fsm_deltimer(&ch->timer);
940 * Notify device statemachine
942 fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
943 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
945 fsm_newstate(fi, CTC_STATE_DTERM);
946 ch2 = priv->channel[CTCM_WRITE];
947 fsm_newstate(ch2->fsm, CTC_STATE_DTERM);
949 ccw_device_halt(ch->cdev, (unsigned long)ch);
950 ccw_device_halt(ch2->cdev, (unsigned long)ch2);
954 * Handle error during TX channel initialization.
956 * fi An instance of a channel statemachine.
957 * event The event, just happened.
958 * arg Generic pointer, casted from channel * upon call.
960 static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg)
962 struct channel *ch = arg;
963 struct net_device *dev = ch->netdev;
964 struct ctcm_priv *priv = dev->ml_priv;
966 if (event == CTC_EVENT_TIMER) {
967 fsm_deltimer(&ch->timer);
969 ctcm_chx_restart(fi, event, arg);
971 fsm_newstate(fi, CTC_STATE_TXERR);
972 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
975 CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR,
976 "%s(%s): %s in %s", CTCM_FUNTAIL, ch->id,
977 ctc_ch_event_names[event], fsm_getstate_str(fi));
980 "Initialization failed with RX/TX init handshake "
981 "error %s\n", ctc_ch_event_names[event]);
986 * Handle TX timeout by retrying operation.
988 * fi An instance of a channel statemachine.
989 * event The event, just happened.
990 * arg Generic pointer, casted from channel * upon call.
992 static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg)
994 struct channel *ch = arg;
995 struct net_device *dev = ch->netdev;
996 struct ctcm_priv *priv = dev->ml_priv;
999 CTCM_PR_DEBUG("Enter: %s: cp=%i ch=0x%p id=%s\n",
1000 __func__, smp_processor_id(), ch, ch->id);
1002 fsm_deltimer(&ch->timer);
1003 if (ch->retry++ > 3) {
1004 struct mpc_group *gptr = priv->mpcg;
1005 CTCM_DBF_TEXT_(TRACE, CTC_DBF_INFO,
1006 "%s: %s: retries exceeded",
1007 CTCM_FUNTAIL, ch->id);
1008 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
1009 /* call restart if not MPC or if MPC and mpcg fsm is ready.
1010 use gptr as mpc indicator */
1011 if (!(gptr && (fsm_getstate(gptr->fsm) != MPCG_STATE_READY)))
1012 ctcm_chx_restart(fi, event, arg);
1016 CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG,
1017 "%s : %s: retry %d",
1018 CTCM_FUNTAIL, ch->id, ch->retry);
1019 skb = skb_peek(&ch->io_queue);
1022 unsigned long saveflags = 0;
1023 clear_normalized_cda(&ch->ccw[4]);
1024 ch->ccw[4].count = skb->len;
1025 if (set_normalized_cda(&ch->ccw[4], skb->data)) {
1026 CTCM_DBF_TEXT_(TRACE, CTC_DBF_INFO,
1027 "%s: %s: IDAL alloc failed",
1028 CTCM_FUNTAIL, ch->id);
1029 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
1030 ctcm_chx_restart(fi, event, arg);
1033 fsm_addtimer(&ch->timer, 1000, CTC_EVENT_TIMER, ch);
1034 if (event == CTC_EVENT_TIMER) /* for TIMER not yet locked */
1035 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
1036 /* Such conditional locking is a known problem for
1037 * sparse because its undeterministic in static view.
1038 * Warnings should be ignored here. */
1040 ctcmpc_dumpit((char *)&ch->ccw[3],
1041 sizeof(struct ccw1) * 3);
1043 rc = ccw_device_start(ch->cdev, &ch->ccw[3],
1044 (unsigned long)ch, 0xff, 0);
1045 if (event == CTC_EVENT_TIMER)
1046 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev),
1049 fsm_deltimer(&ch->timer);
1050 ctcm_ccw_check_rc(ch, rc, "TX in chx_txretry");
1051 ctcm_purge_skb_queue(&ch->io_queue);
1059 * Handle fatal errors during an I/O command.
1061 * fi An instance of a channel statemachine.
1062 * event The event, just happened.
1063 * arg Generic pointer, casted from channel * upon call.
1065 static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg)
1067 struct channel *ch = arg;
1068 struct net_device *dev = ch->netdev;
1069 struct ctcm_priv *priv = dev->ml_priv;
1070 int rd = CHANNEL_DIRECTION(ch->flags);
1072 fsm_deltimer(&ch->timer);
1073 CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR,
1074 "%s: %s: %s unrecoverable channel error",
1075 CTCM_FUNTAIL, ch->id, rd == CTCM_READ ? "RX" : "TX");
1078 priv->stats.tx_dropped++;
1079 priv->stats.tx_errors++;
1081 if (rd == CTCM_READ) {
1082 fsm_newstate(fi, CTC_STATE_RXERR);
1083 fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
1085 fsm_newstate(fi, CTC_STATE_TXERR);
1086 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
1091 * The ctcm statemachine for a channel.
1093 const fsm_node ch_fsm[] = {
1094 { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop },
1095 { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start },
1096 { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop },
1097 { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop },
1099 { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop },
1100 { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop },
1101 { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop },
1102 { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop },
1103 { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start },
1105 { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1106 { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop },
1107 { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
1108 { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr },
1109 { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1110 { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1112 { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio },
1113 { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode },
1114 { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_action_nop },
1115 { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1117 { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1118 { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop },
1119 { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, chx_firstio },
1120 { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1121 { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1122 { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode },
1123 { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1124 { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1126 { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1127 { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop },
1128 { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, chx_rxidle },
1129 { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr },
1130 { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr },
1131 { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr },
1132 { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail },
1133 { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1134 { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, chx_firstio },
1135 { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1137 { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio },
1138 { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop },
1139 { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, chx_rx },
1140 { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc },
1141 { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1142 { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1143 { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, chx_rx },
1145 { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1146 { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop },
1147 { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle },
1148 { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr },
1149 { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr },
1150 { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr },
1151 { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1152 { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1154 { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio },
1155 { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop },
1156 { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, chx_firstio },
1157 { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
1158 { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
1159 { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1160 { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1162 { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop },
1163 { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart },
1164 { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped },
1165 { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
1166 { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
1167 { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1169 { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio },
1170 { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart },
1171 { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
1172 { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
1173 { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
1174 { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1176 { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio },
1177 { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop },
1178 { CTC_STATE_TX, CTC_EVENT_FINSTAT, chx_txdone },
1179 { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_txretry },
1180 { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_txretry },
1181 { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry },
1182 { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1183 { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1185 { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio },
1186 { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio },
1187 { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1188 { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1191 int ch_fsm_len = ARRAY_SIZE(ch_fsm);
1194 * MPC actions for mpc channel statemachine
1195 * handling of MPC protocol requires extra
1196 * statemachine and actions which are prefixed ctcmpc_ .
1197 * The ctc_ch_states and ctc_ch_state_names,
1198 * ctc_ch_events and ctc_ch_event_names share the ctcm definitions
1199 * which are expanded by some elements.
1203 * Actions for mpc channel statemachine.
1207 * Normal data has been send. Free the corresponding
1208 * skb (it's in io_queue), reset dev->tbusy and
1209 * revert to idle state.
1211 * fi An instance of a channel statemachine.
1212 * event The event, just happened.
1213 * arg Generic pointer, casted from channel * upon call.
1215 static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg)
1217 struct channel *ch = arg;
1218 struct net_device *dev = ch->netdev;
1219 struct ctcm_priv *priv = dev->ml_priv;
1220 struct mpc_group *grp = priv->mpcg;
1221 struct sk_buff *skb;
1225 unsigned long duration;
1226 struct sk_buff *peekskb;
1228 struct th_header *header;
1229 struct pdu *p_header;
1230 unsigned long done_stamp = jiffies;
1232 CTCM_PR_DEBUG("Enter %s: %s cp:%i\n",
1233 __func__, dev->name, smp_processor_id());
1235 duration = done_stamp - ch->prof.send_stamp;
1236 if (duration > ch->prof.tx_time)
1237 ch->prof.tx_time = duration;
1239 if (ch->irb->scsw.cmd.count != 0)
1240 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG,
1241 "%s(%s): TX not complete, remaining %d bytes",
1242 CTCM_FUNTAIL, dev->name, ch->irb->scsw.cmd.count);
1243 fsm_deltimer(&ch->timer);
1244 while ((skb = skb_dequeue(&ch->io_queue))) {
1245 priv->stats.tx_packets++;
1246 priv->stats.tx_bytes += skb->len - TH_HEADER_LENGTH;
1248 priv->stats.tx_bytes += 2;
1251 atomic_dec(&skb->users);
1252 dev_kfree_skb_irq(skb);
1254 spin_lock(&ch->collect_lock);
1255 clear_normalized_cda(&ch->ccw[4]);
1256 if ((ch->collect_len <= 0) || (grp->in_sweep != 0)) {
1257 spin_unlock(&ch->collect_lock);
1258 fsm_newstate(fi, CTC_STATE_TXIDLE);
1262 if (ctcm_checkalloc_buffer(ch)) {
1263 spin_unlock(&ch->collect_lock);
1266 ch->trans_skb->data = ch->trans_skb_data;
1267 skb_reset_tail_pointer(ch->trans_skb);
1268 ch->trans_skb->len = 0;
1269 if (ch->prof.maxmulti < (ch->collect_len + TH_HEADER_LENGTH))
1270 ch->prof.maxmulti = ch->collect_len + TH_HEADER_LENGTH;
1271 if (ch->prof.maxcqueue < skb_queue_len(&ch->collect_queue))
1272 ch->prof.maxcqueue = skb_queue_len(&ch->collect_queue);
1275 data_space = grp->group_max_buflen - TH_HEADER_LENGTH;
1277 CTCM_PR_DBGDATA("%s: building trans_skb from collect_q"
1278 " data_space:%04x\n",
1279 __func__, data_space);
1281 while ((skb = skb_dequeue(&ch->collect_queue))) {
1282 skb_put_data(ch->trans_skb, skb->data, skb->len);
1283 p_header = (struct pdu *)
1284 (skb_tail_pointer(ch->trans_skb) - skb->len);
1285 p_header->pdu_flag = 0x00;
1286 if (be16_to_cpu(skb->protocol) == ETH_P_SNAP)
1287 p_header->pdu_flag |= 0x60;
1289 p_header->pdu_flag |= 0x20;
1291 CTCM_PR_DBGDATA("%s: trans_skb len:%04x \n",
1292 __func__, ch->trans_skb->len);
1293 CTCM_PR_DBGDATA("%s: pdu header and data for up"
1294 " to 32 bytes sent to vtam\n", __func__);
1295 CTCM_D3_DUMP((char *)p_header, min_t(int, skb->len, 32));
1297 ch->collect_len -= skb->len;
1298 data_space -= skb->len;
1299 priv->stats.tx_packets++;
1300 priv->stats.tx_bytes += skb->len;
1301 atomic_dec(&skb->users);
1302 dev_kfree_skb_any(skb);
1303 peekskb = skb_peek(&ch->collect_queue);
1304 if (peekskb->len > data_space)
1308 /* p_header points to the last one we handled */
1310 p_header->pdu_flag |= PDU_LAST; /*Say it's the last one*/
1311 header = kzalloc(TH_HEADER_LENGTH, gfp_type());
1313 spin_unlock(&ch->collect_lock);
1314 fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev);
1317 header->th_ch_flag = TH_HAS_PDU; /* Normal data */
1319 header->th_seq_num = ch->th_seq_num;
1321 CTCM_PR_DBGDATA("%s: ToVTAM_th_seq= %08x\n" ,
1322 __func__, ch->th_seq_num);
1324 memcpy(skb_push(ch->trans_skb, TH_HEADER_LENGTH), header,
1325 TH_HEADER_LENGTH); /* put the TH on the packet */
1329 CTCM_PR_DBGDATA("%s: trans_skb len:%04x \n",
1330 __func__, ch->trans_skb->len);
1331 CTCM_PR_DBGDATA("%s: up-to-50 bytes of trans_skb "
1332 "data to vtam from collect_q\n", __func__);
1333 CTCM_D3_DUMP((char *)ch->trans_skb->data,
1334 min_t(int, ch->trans_skb->len, 50));
1336 spin_unlock(&ch->collect_lock);
1337 clear_normalized_cda(&ch->ccw[1]);
1339 CTCM_PR_DBGDATA("ccwcda=0x%p data=0x%p\n",
1340 (void *)(unsigned long)ch->ccw[1].cda,
1341 ch->trans_skb->data);
1342 ch->ccw[1].count = ch->max_bufsize;
1344 if (set_normalized_cda(&ch->ccw[1], ch->trans_skb->data)) {
1345 dev_kfree_skb_any(ch->trans_skb);
1346 ch->trans_skb = NULL;
1347 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ERROR,
1348 "%s: %s: IDAL alloc failed",
1349 CTCM_FUNTAIL, ch->id);
1350 fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev);
1354 CTCM_PR_DBGDATA("ccwcda=0x%p data=0x%p\n",
1355 (void *)(unsigned long)ch->ccw[1].cda,
1356 ch->trans_skb->data);
1358 ch->ccw[1].count = ch->trans_skb->len;
1359 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
1360 ch->prof.send_stamp = jiffies;
1362 ctcmpc_dumpit((char *)&ch->ccw[0], sizeof(struct ccw1) * 3);
1363 rc = ccw_device_start(ch->cdev, &ch->ccw[0],
1364 (unsigned long)ch, 0xff, 0);
1365 ch->prof.doios_multi++;
1367 priv->stats.tx_dropped += i;
1368 priv->stats.tx_errors += i;
1369 fsm_deltimer(&ch->timer);
1370 ctcm_ccw_check_rc(ch, rc, "chained TX");
1373 ctcm_clear_busy(dev);
1378 * Got normal data, check for sanity, queue it up, allocate new buffer
1379 * trigger bottom half, and initiate next read.
1381 * fi An instance of a channel statemachine.
1382 * event The event, just happened.
1383 * arg Generic pointer, casted from channel * upon call.
1385 static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg)
1387 struct channel *ch = arg;
1388 struct net_device *dev = ch->netdev;
1389 struct ctcm_priv *priv = dev->ml_priv;
1390 struct mpc_group *grp = priv->mpcg;
1391 struct sk_buff *skb = ch->trans_skb;
1392 struct sk_buff *new_skb;
1393 unsigned long saveflags = 0; /* avoids compiler warning */
1394 int len = ch->max_bufsize - ch->irb->scsw.cmd.count;
1396 CTCM_PR_DEBUG("%s: %s: cp:%i %s maxbuf : %04x, len: %04x\n",
1397 CTCM_FUNTAIL, dev->name, smp_processor_id(),
1398 ch->id, ch->max_bufsize, len);
1399 fsm_deltimer(&ch->timer);
1402 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1403 "%s(%s): TRANS_SKB = NULL",
1404 CTCM_FUNTAIL, dev->name);
1408 if (len < TH_HEADER_LENGTH) {
1409 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1410 "%s(%s): packet length %d to short",
1411 CTCM_FUNTAIL, dev->name, len);
1412 priv->stats.rx_dropped++;
1413 priv->stats.rx_length_errors++;
1415 /* must have valid th header or game over */
1416 __u32 block_len = len;
1417 len = TH_HEADER_LENGTH + XID2_LENGTH + 4;
1418 new_skb = __dev_alloc_skb(ch->max_bufsize, GFP_ATOMIC);
1420 if (new_skb == NULL) {
1421 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1422 "%s(%d): skb allocation failed",
1423 CTCM_FUNTAIL, dev->name);
1424 fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev);
1427 switch (fsm_getstate(grp->fsm)) {
1428 case MPCG_STATE_RESET:
1429 case MPCG_STATE_INOP:
1430 dev_kfree_skb_any(new_skb);
1432 case MPCG_STATE_FLOWC:
1433 case MPCG_STATE_READY:
1434 skb_put_data(new_skb, skb->data, block_len);
1435 skb_queue_tail(&ch->io_queue, new_skb);
1436 tasklet_schedule(&ch->ch_tasklet);
1439 skb_put_data(new_skb, skb->data, len);
1440 skb_queue_tail(&ch->io_queue, new_skb);
1441 tasklet_hi_schedule(&ch->ch_tasklet);
1447 switch (fsm_getstate(grp->fsm)) {
1449 case MPCG_STATE_FLOWC:
1450 case MPCG_STATE_READY:
1451 if (ctcm_checkalloc_buffer(ch))
1453 ch->trans_skb->data = ch->trans_skb_data;
1454 skb_reset_tail_pointer(ch->trans_skb);
1455 ch->trans_skb->len = 0;
1456 ch->ccw[1].count = ch->max_bufsize;
1458 ctcmpc_dumpit((char *)&ch->ccw[0],
1459 sizeof(struct ccw1) * 3);
1463 get_ccwdev_lock(ch->cdev), saveflags);
1464 rc = ccw_device_start(ch->cdev, &ch->ccw[0],
1465 (unsigned long)ch, 0xff, 0);
1466 if (dolock) /* see remark about conditional locking */
1467 spin_unlock_irqrestore(
1468 get_ccwdev_lock(ch->cdev), saveflags);
1470 ctcm_ccw_check_rc(ch, rc, "normal RX");
1475 CTCM_PR_DEBUG("Exit %s: %s, ch=0x%p, id=%s\n",
1476 __func__, dev->name, ch, ch->id);
1481 * Initialize connection by sending a __u16 of value 0.
1483 * fi An instance of a channel statemachine.
1484 * event The event, just happened.
1485 * arg Generic pointer, casted from channel * upon call.
1487 static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg)
1489 struct channel *ch = arg;
1490 struct net_device *dev = ch->netdev;
1491 struct ctcm_priv *priv = dev->ml_priv;
1492 struct mpc_group *gptr = priv->mpcg;
1494 CTCM_PR_DEBUG("Enter %s: id=%s, ch=0x%p\n",
1495 __func__, ch->id, ch);
1497 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_INFO,
1498 "%s: %s: chstate:%i, grpstate:%i, prot:%i\n",
1499 CTCM_FUNTAIL, ch->id, fsm_getstate(fi),
1500 fsm_getstate(gptr->fsm), ch->protocol);
1502 if (fsm_getstate(fi) == CTC_STATE_TXIDLE)
1503 MPC_DBF_DEV_NAME(TRACE, dev, "remote side issued READ? ");
1505 fsm_deltimer(&ch->timer);
1506 if (ctcm_checkalloc_buffer(ch))
1509 switch (fsm_getstate(fi)) {
1510 case CTC_STATE_STARTRETRY:
1511 case CTC_STATE_SETUPWAIT:
1512 if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) {
1513 ctcmpc_chx_rxidle(fi, event, arg);
1515 fsm_newstate(fi, CTC_STATE_TXIDLE);
1516 fsm_event(priv->fsm, DEV_EVENT_TXUP, dev);
1523 fsm_newstate(fi, (CHANNEL_DIRECTION(ch->flags) == CTCM_READ)
1524 ? CTC_STATE_RXINIT : CTC_STATE_TXINIT);
1527 CTCM_PR_DEBUG("Exit %s: id=%s, ch=0x%p\n",
1528 __func__, ch->id, ch);
1533 * Got initial data, check it. If OK,
1534 * notify device statemachine that we are up and
1537 * fi An instance of a channel statemachine.
1538 * event The event, just happened.
1539 * arg Generic pointer, casted from channel * upon call.
1541 void ctcmpc_chx_rxidle(fsm_instance *fi, int event, void *arg)
1543 struct channel *ch = arg;
1544 struct net_device *dev = ch->netdev;
1545 struct ctcm_priv *priv = dev->ml_priv;
1546 struct mpc_group *grp = priv->mpcg;
1548 unsigned long saveflags = 0; /* avoids compiler warning */
1550 fsm_deltimer(&ch->timer);
1551 CTCM_PR_DEBUG("%s: %s: %s: cp:%i, chstate:%i grpstate:%i\n",
1552 __func__, ch->id, dev->name, smp_processor_id(),
1553 fsm_getstate(fi), fsm_getstate(grp->fsm));
1555 fsm_newstate(fi, CTC_STATE_RXIDLE);
1556 /* XID processing complete */
1558 switch (fsm_getstate(grp->fsm)) {
1559 case MPCG_STATE_FLOWC:
1560 case MPCG_STATE_READY:
1561 if (ctcm_checkalloc_buffer(ch))
1563 ch->trans_skb->data = ch->trans_skb_data;
1564 skb_reset_tail_pointer(ch->trans_skb);
1565 ch->trans_skb->len = 0;
1566 ch->ccw[1].count = ch->max_bufsize;
1567 CTCM_CCW_DUMP((char *)&ch->ccw[0], sizeof(struct ccw1) * 3);
1568 if (event == CTC_EVENT_START)
1569 /* see remark about conditional locking */
1570 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
1571 rc = ccw_device_start(ch->cdev, &ch->ccw[0],
1572 (unsigned long)ch, 0xff, 0);
1573 if (event == CTC_EVENT_START)
1574 spin_unlock_irqrestore(
1575 get_ccwdev_lock(ch->cdev), saveflags);
1577 fsm_newstate(fi, CTC_STATE_RXINIT);
1578 ctcm_ccw_check_rc(ch, rc, "initial RX");
1586 fsm_event(priv->fsm, DEV_EVENT_RXUP, dev);
1592 * ctcmpc channel FSM action
1593 * called from several points in ctcmpc_ch_fsm
1596 static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg)
1598 struct channel *ch = arg;
1599 struct net_device *dev = ch->netdev;
1600 struct ctcm_priv *priv = dev->ml_priv;
1601 struct mpc_group *grp = priv->mpcg;
1603 CTCM_PR_DEBUG("%s(%s): %s(ch=0x%p), cp=%i, ChStat:%s, GrpStat:%s\n",
1604 __func__, dev->name, ch->id, ch, smp_processor_id(),
1605 fsm_getstate_str(ch->fsm), fsm_getstate_str(grp->fsm));
1607 switch (fsm_getstate(grp->fsm)) {
1608 case MPCG_STATE_XID2INITW:
1609 /* ok..start yside xid exchanges */
1610 if (!ch->in_mpcgroup)
1612 if (fsm_getstate(ch->fsm) == CH_XID0_PENDING) {
1613 fsm_deltimer(&grp->timer);
1614 fsm_addtimer(&grp->timer,
1615 MPC_XID_TIMEOUT_VALUE,
1616 MPCG_EVENT_TIMER, dev);
1617 fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch);
1619 } else if (fsm_getstate(ch->fsm) < CH_XID7_PENDING1)
1620 /* attn rcvd before xid0 processed via bh */
1621 fsm_newstate(ch->fsm, CH_XID7_PENDING1);
1623 case MPCG_STATE_XID2INITX:
1624 case MPCG_STATE_XID0IOWAIT:
1625 case MPCG_STATE_XID0IOWAIX:
1626 /* attn rcvd before xid0 processed on ch
1627 but mid-xid0 processing for group */
1628 if (fsm_getstate(ch->fsm) < CH_XID7_PENDING1)
1629 fsm_newstate(ch->fsm, CH_XID7_PENDING1);
1631 case MPCG_STATE_XID7INITW:
1632 case MPCG_STATE_XID7INITX:
1633 case MPCG_STATE_XID7INITI:
1634 case MPCG_STATE_XID7INITZ:
1635 switch (fsm_getstate(ch->fsm)) {
1636 case CH_XID7_PENDING:
1637 fsm_newstate(ch->fsm, CH_XID7_PENDING1);
1639 case CH_XID7_PENDING2:
1640 fsm_newstate(ch->fsm, CH_XID7_PENDING3);
1643 fsm_event(grp->fsm, MPCG_EVENT_XID7DONE, dev);
1651 * ctcmpc channel FSM action
1652 * called from one point in ctcmpc_ch_fsm
1655 static void ctcmpc_chx_attnbusy(fsm_instance *fsm, int event, void *arg)
1657 struct channel *ch = arg;
1658 struct net_device *dev = ch->netdev;
1659 struct ctcm_priv *priv = dev->ml_priv;
1660 struct mpc_group *grp = priv->mpcg;
1662 CTCM_PR_DEBUG("%s(%s): %s\n ChState:%s GrpState:%s\n",
1663 __func__, dev->name, ch->id,
1664 fsm_getstate_str(ch->fsm), fsm_getstate_str(grp->fsm));
1666 fsm_deltimer(&ch->timer);
1668 switch (fsm_getstate(grp->fsm)) {
1669 case MPCG_STATE_XID0IOWAIT:
1670 /* vtam wants to be primary.start yside xid exchanges*/
1671 /* only receive one attn-busy at a time so must not */
1672 /* change state each time */
1673 grp->changed_side = 1;
1674 fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW);
1676 case MPCG_STATE_XID2INITW:
1677 if (grp->changed_side == 1) {
1678 grp->changed_side = 2;
1681 /* process began via call to establish_conn */
1682 /* so must report failure instead of reverting */
1683 /* back to ready-for-xid passive state */
1684 if (grp->estconnfunc)
1686 /* this attnbusy is NOT the result of xside xid */
1687 /* collisions so yside must have been triggered */
1688 /* by an ATTN that was not intended to start XID */
1689 /* processing. Revert back to ready-for-xid and */
1690 /* wait for ATTN interrupt to signal xid start */
1691 if (fsm_getstate(ch->fsm) == CH_XID0_INPROGRESS) {
1692 fsm_newstate(ch->fsm, CH_XID0_PENDING) ;
1693 fsm_deltimer(&grp->timer);
1696 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1698 case MPCG_STATE_XID2INITX:
1699 /* XID2 was received before ATTN Busy for second
1700 channel.Send yside xid for second channel.
1702 if (grp->changed_side == 1) {
1703 grp->changed_side = 2;
1706 case MPCG_STATE_XID0IOWAIX:
1707 case MPCG_STATE_XID7INITW:
1708 case MPCG_STATE_XID7INITX:
1709 case MPCG_STATE_XID7INITI:
1710 case MPCG_STATE_XID7INITZ:
1712 /* multiple attn-busy indicates too out-of-sync */
1713 /* and they are certainly not being received as part */
1714 /* of valid mpc group negotiations.. */
1715 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1719 if (grp->changed_side == 1) {
1720 fsm_deltimer(&grp->timer);
1721 fsm_addtimer(&grp->timer, MPC_XID_TIMEOUT_VALUE,
1722 MPCG_EVENT_TIMER, dev);
1724 if (ch->in_mpcgroup)
1725 fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch);
1727 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1728 "%s(%s): channel %s not added to group",
1729 CTCM_FUNTAIL, dev->name, ch->id);
1736 * ctcmpc channel FSM action
1737 * called from several points in ctcmpc_ch_fsm
1740 static void ctcmpc_chx_resend(fsm_instance *fsm, int event, void *arg)
1742 struct channel *ch = arg;
1743 struct net_device *dev = ch->netdev;
1744 struct ctcm_priv *priv = dev->ml_priv;
1745 struct mpc_group *grp = priv->mpcg;
1747 fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch);
1752 * ctcmpc channel FSM action
1753 * called from several points in ctcmpc_ch_fsm
1756 static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg)
1758 struct channel *ach = arg;
1759 struct net_device *dev = ach->netdev;
1760 struct ctcm_priv *priv = dev->ml_priv;
1761 struct mpc_group *grp = priv->mpcg;
1762 struct channel *wch = priv->channel[CTCM_WRITE];
1763 struct channel *rch = priv->channel[CTCM_READ];
1764 struct sk_buff *skb;
1765 struct th_sweep *header;
1767 unsigned long saveflags = 0;
1769 CTCM_PR_DEBUG("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s\n",
1770 __func__, smp_processor_id(), ach, ach->id);
1772 if (grp->in_sweep == 0)
1775 CTCM_PR_DBGDATA("%s: 1: ToVTAM_th_seq= %08x\n" ,
1776 __func__, wch->th_seq_num);
1777 CTCM_PR_DBGDATA("%s: 1: FromVTAM_th_seq= %08x\n" ,
1778 __func__, rch->th_seq_num);
1780 if (fsm_getstate(wch->fsm) != CTC_STATE_TXIDLE) {
1781 /* give the previous IO time to complete */
1782 fsm_addtimer(&wch->sweep_timer,
1783 200, CTC_EVENT_RSWEEP_TIMER, wch);
1787 skb = skb_dequeue(&wch->sweep_queue);
1791 if (set_normalized_cda(&wch->ccw[4], skb->data)) {
1793 ctcm_clear_busy_do(dev);
1794 dev_kfree_skb_any(skb);
1795 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1798 atomic_inc(&skb->users);
1799 skb_queue_tail(&wch->io_queue, skb);
1802 /* send out the sweep */
1803 wch->ccw[4].count = skb->len;
1805 header = (struct th_sweep *)skb->data;
1806 switch (header->th.th_ch_flag) {
1808 grp->sweep_req_pend_num--;
1811 grp->sweep_rsp_pend_num--;
1815 header->sw.th_last_seq = wch->th_seq_num;
1817 CTCM_CCW_DUMP((char *)&wch->ccw[3], sizeof(struct ccw1) * 3);
1818 CTCM_PR_DBGDATA("%s: sweep packet\n", __func__);
1819 CTCM_D3_DUMP((char *)header, TH_SWEEP_LENGTH);
1821 fsm_addtimer(&wch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, wch);
1822 fsm_newstate(wch->fsm, CTC_STATE_TX);
1824 spin_lock_irqsave(get_ccwdev_lock(wch->cdev), saveflags);
1825 wch->prof.send_stamp = jiffies;
1826 rc = ccw_device_start(wch->cdev, &wch->ccw[3],
1827 (unsigned long) wch, 0xff, 0);
1828 spin_unlock_irqrestore(get_ccwdev_lock(wch->cdev), saveflags);
1830 if ((grp->sweep_req_pend_num == 0) &&
1831 (grp->sweep_rsp_pend_num == 0)) {
1833 rch->th_seq_num = 0x00;
1834 wch->th_seq_num = 0x00;
1835 ctcm_clear_busy_do(dev);
1838 CTCM_PR_DBGDATA("%s: To-/From-VTAM_th_seq = %08x/%08x\n" ,
1839 __func__, wch->th_seq_num, rch->th_seq_num);
1842 ctcm_ccw_check_rc(wch, rc, "send sweep");
1850 * The ctcmpc statemachine for a channel.
1853 const fsm_node ctcmpc_ch_fsm[] = {
1854 { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop },
1855 { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start },
1856 { CTC_STATE_STOPPED, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1857 { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop },
1858 { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop },
1860 { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop },
1861 { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop },
1862 { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop },
1863 { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop },
1864 { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start },
1865 { CTC_STATE_NOTOP, CTC_EVENT_UC_RCRESET, ctcm_chx_stop },
1866 { CTC_STATE_NOTOP, CTC_EVENT_UC_RSRESET, ctcm_chx_stop },
1867 { CTC_STATE_NOTOP, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1869 { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1870 { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop },
1871 { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
1872 { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr },
1873 { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1874 { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1876 { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio },
1877 { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode },
1878 { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
1879 { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1880 { CTC_STATE_STARTRETRY, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1882 { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1883 { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop },
1884 { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio },
1885 { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1886 { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1887 { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode },
1888 { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1889 { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1891 { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1892 { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop },
1893 { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, ctcmpc_chx_rxidle },
1894 { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr },
1895 { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr },
1896 { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr },
1897 { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail },
1898 { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1899 { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, ctcmpc_chx_firstio },
1900 { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1902 { CH_XID0_PENDING, CTC_EVENT_FINSTAT, ctcm_action_nop },
1903 { CH_XID0_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1904 { CH_XID0_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio },
1905 { CH_XID0_PENDING, CTC_EVENT_START, ctcm_action_nop },
1906 { CH_XID0_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1907 { CH_XID0_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1908 { CH_XID0_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1909 { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1910 { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1911 { CH_XID0_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
1913 { CH_XID0_INPROGRESS, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1914 { CH_XID0_INPROGRESS, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1915 { CH_XID0_INPROGRESS, CTC_EVENT_STOP, ctcm_chx_haltio },
1916 { CH_XID0_INPROGRESS, CTC_EVENT_START, ctcm_action_nop },
1917 { CH_XID0_INPROGRESS, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1918 { CH_XID0_INPROGRESS, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1919 { CH_XID0_INPROGRESS, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1920 { CH_XID0_INPROGRESS, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1921 { CH_XID0_INPROGRESS, CTC_EVENT_ATTNBUSY, ctcmpc_chx_attnbusy },
1922 { CH_XID0_INPROGRESS, CTC_EVENT_TIMER, ctcmpc_chx_resend },
1923 { CH_XID0_INPROGRESS, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
1925 { CH_XID7_PENDING, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1926 { CH_XID7_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1927 { CH_XID7_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio },
1928 { CH_XID7_PENDING, CTC_EVENT_START, ctcm_action_nop },
1929 { CH_XID7_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1930 { CH_XID7_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1931 { CH_XID7_PENDING, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1932 { CH_XID7_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1933 { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1934 { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1935 { CH_XID7_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
1936 { CH_XID7_PENDING, CTC_EVENT_TIMER, ctcmpc_chx_resend },
1937 { CH_XID7_PENDING, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
1939 { CH_XID7_PENDING1, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1940 { CH_XID7_PENDING1, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1941 { CH_XID7_PENDING1, CTC_EVENT_STOP, ctcm_chx_haltio },
1942 { CH_XID7_PENDING1, CTC_EVENT_START, ctcm_action_nop },
1943 { CH_XID7_PENDING1, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1944 { CH_XID7_PENDING1, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1945 { CH_XID7_PENDING1, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1946 { CH_XID7_PENDING1, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1947 { CH_XID7_PENDING1, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1948 { CH_XID7_PENDING1, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
1949 { CH_XID7_PENDING1, CTC_EVENT_TIMER, ctcmpc_chx_resend },
1950 { CH_XID7_PENDING1, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
1952 { CH_XID7_PENDING2, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1953 { CH_XID7_PENDING2, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1954 { CH_XID7_PENDING2, CTC_EVENT_STOP, ctcm_chx_haltio },
1955 { CH_XID7_PENDING2, CTC_EVENT_START, ctcm_action_nop },
1956 { CH_XID7_PENDING2, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1957 { CH_XID7_PENDING2, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1958 { CH_XID7_PENDING2, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1959 { CH_XID7_PENDING2, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1960 { CH_XID7_PENDING2, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1961 { CH_XID7_PENDING2, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
1962 { CH_XID7_PENDING2, CTC_EVENT_TIMER, ctcmpc_chx_resend },
1963 { CH_XID7_PENDING2, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
1965 { CH_XID7_PENDING3, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1966 { CH_XID7_PENDING3, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1967 { CH_XID7_PENDING3, CTC_EVENT_STOP, ctcm_chx_haltio },
1968 { CH_XID7_PENDING3, CTC_EVENT_START, ctcm_action_nop },
1969 { CH_XID7_PENDING3, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1970 { CH_XID7_PENDING3, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1971 { CH_XID7_PENDING3, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1972 { CH_XID7_PENDING3, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1973 { CH_XID7_PENDING3, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1974 { CH_XID7_PENDING3, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
1975 { CH_XID7_PENDING3, CTC_EVENT_TIMER, ctcmpc_chx_resend },
1976 { CH_XID7_PENDING3, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
1978 { CH_XID7_PENDING4, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1979 { CH_XID7_PENDING4, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1980 { CH_XID7_PENDING4, CTC_EVENT_STOP, ctcm_chx_haltio },
1981 { CH_XID7_PENDING4, CTC_EVENT_START, ctcm_action_nop },
1982 { CH_XID7_PENDING4, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1983 { CH_XID7_PENDING4, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1984 { CH_XID7_PENDING4, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1985 { CH_XID7_PENDING4, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1986 { CH_XID7_PENDING4, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1987 { CH_XID7_PENDING4, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
1988 { CH_XID7_PENDING4, CTC_EVENT_TIMER, ctcmpc_chx_resend },
1989 { CH_XID7_PENDING4, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
1991 { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio },
1992 { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop },
1993 { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1994 { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc },
1995 { CTC_STATE_RXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail },
1996 { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1997 { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1998 { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
2000 { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio },
2001 { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop },
2002 { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle },
2003 { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr },
2004 { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr },
2005 { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr },
2006 { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
2007 { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2008 { CTC_STATE_TXINIT, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep },
2010 { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio },
2011 { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop },
2012 { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio },
2013 { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_fail },
2014 { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail },
2015 { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
2016 { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2017 { CTC_STATE_TXIDLE, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep },
2019 { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop },
2020 { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart },
2021 { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped },
2022 { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
2023 { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
2024 { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2025 { CTC_STATE_TERM, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
2026 { CTC_STATE_TERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
2028 { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio },
2029 { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart },
2030 { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
2031 { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
2032 { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
2033 { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2034 { CTC_STATE_DTERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
2036 { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio },
2037 { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop },
2038 { CTC_STATE_TX, CTC_EVENT_FINSTAT, ctcmpc_chx_txdone },
2039 { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_fail },
2040 { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_fail },
2041 { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry },
2042 { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
2043 { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2044 { CTC_STATE_TX, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep },
2045 { CTC_STATE_TX, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
2047 { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio },
2048 { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio },
2049 { CTC_STATE_TXERR, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
2050 { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2051 { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2054 int mpc_ch_fsm_len = ARRAY_SIZE(ctcmpc_ch_fsm);
2057 * Actions for interface - statemachine.
2061 * Startup channels by sending CTC_EVENT_START to each channel.
2063 * fi An instance of an interface statemachine.
2064 * event The event, just happened.
2065 * arg Generic pointer, casted from struct net_device * upon call.
2067 static void dev_action_start(fsm_instance *fi, int event, void *arg)
2069 struct net_device *dev = arg;
2070 struct ctcm_priv *priv = dev->ml_priv;
2073 CTCMY_DBF_DEV_NAME(SETUP, dev, "");
2075 fsm_deltimer(&priv->restart_timer);
2076 fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX);
2078 priv->mpcg->channels_terminating = 0;
2079 for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) {
2080 struct channel *ch = priv->channel[direction];
2081 fsm_event(ch->fsm, CTC_EVENT_START, ch);
2086 * Shutdown channels by sending CTC_EVENT_STOP to each channel.
2088 * fi An instance of an interface statemachine.
2089 * event The event, just happened.
2090 * arg Generic pointer, casted from struct net_device * upon call.
2092 static void dev_action_stop(fsm_instance *fi, int event, void *arg)
2095 struct net_device *dev = arg;
2096 struct ctcm_priv *priv = dev->ml_priv;
2098 CTCMY_DBF_DEV_NAME(SETUP, dev, "");
2100 fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX);
2101 for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) {
2102 struct channel *ch = priv->channel[direction];
2103 fsm_event(ch->fsm, CTC_EVENT_STOP, ch);
2104 ch->th_seq_num = 0x00;
2105 CTCM_PR_DEBUG("%s: CH_th_seq= %08x\n",
2106 __func__, ch->th_seq_num);
2109 fsm_newstate(priv->mpcg->fsm, MPCG_STATE_RESET);
2112 static void dev_action_restart(fsm_instance *fi, int event, void *arg)
2115 struct net_device *dev = arg;
2116 struct ctcm_priv *priv = dev->ml_priv;
2118 CTCMY_DBF_DEV_NAME(TRACE, dev, "");
2121 restart_timer = CTCM_TIME_1_SEC;
2123 restart_timer = CTCM_TIME_5_SEC;
2125 dev_info(&dev->dev, "Restarting device\n");
2127 dev_action_stop(fi, event, arg);
2128 fsm_event(priv->fsm, DEV_EVENT_STOP, dev);
2130 fsm_newstate(priv->mpcg->fsm, MPCG_STATE_RESET);
2132 /* going back into start sequence too quickly can */
2133 /* result in the other side becoming unreachable due */
2134 /* to sense reported when IO is aborted */
2135 fsm_addtimer(&priv->restart_timer, restart_timer,
2136 DEV_EVENT_START, dev);
2140 * Called from channel statemachine
2141 * when a channel is up and running.
2143 * fi An instance of an interface statemachine.
2144 * event The event, just happened.
2145 * arg Generic pointer, casted from struct net_device * upon call.
2147 static void dev_action_chup(fsm_instance *fi, int event, void *arg)
2149 struct net_device *dev = arg;
2150 struct ctcm_priv *priv = dev->ml_priv;
2151 int dev_stat = fsm_getstate(fi);
2153 CTCM_DBF_TEXT_(SETUP, CTC_DBF_NOTICE,
2154 "%s(%s): priv = %p [%d,%d]\n ", CTCM_FUNTAIL,
2155 dev->name, dev->ml_priv, dev_stat, event);
2157 switch (fsm_getstate(fi)) {
2158 case DEV_STATE_STARTWAIT_RXTX:
2159 if (event == DEV_EVENT_RXUP)
2160 fsm_newstate(fi, DEV_STATE_STARTWAIT_TX);
2162 fsm_newstate(fi, DEV_STATE_STARTWAIT_RX);
2164 case DEV_STATE_STARTWAIT_RX:
2165 if (event == DEV_EVENT_RXUP) {
2166 fsm_newstate(fi, DEV_STATE_RUNNING);
2168 "Connected with remote side\n");
2169 ctcm_clear_busy(dev);
2172 case DEV_STATE_STARTWAIT_TX:
2173 if (event == DEV_EVENT_TXUP) {
2174 fsm_newstate(fi, DEV_STATE_RUNNING);
2176 "Connected with remote side\n");
2177 ctcm_clear_busy(dev);
2180 case DEV_STATE_STOPWAIT_TX:
2181 if (event == DEV_EVENT_RXUP)
2182 fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX);
2184 case DEV_STATE_STOPWAIT_RX:
2185 if (event == DEV_EVENT_TXUP)
2186 fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX);
2191 if (event == DEV_EVENT_RXUP)
2192 mpc_channel_action(priv->channel[CTCM_READ],
2193 CTCM_READ, MPC_CHANNEL_ADD);
2195 mpc_channel_action(priv->channel[CTCM_WRITE],
2196 CTCM_WRITE, MPC_CHANNEL_ADD);
2201 * Called from device statemachine
2202 * when a channel has been shutdown.
2204 * fi An instance of an interface statemachine.
2205 * event The event, just happened.
2206 * arg Generic pointer, casted from struct net_device * upon call.
2208 static void dev_action_chdown(fsm_instance *fi, int event, void *arg)
2211 struct net_device *dev = arg;
2212 struct ctcm_priv *priv = dev->ml_priv;
2214 CTCMY_DBF_DEV_NAME(SETUP, dev, "");
2216 switch (fsm_getstate(fi)) {
2217 case DEV_STATE_RUNNING:
2218 if (event == DEV_EVENT_TXDOWN)
2219 fsm_newstate(fi, DEV_STATE_STARTWAIT_TX);
2221 fsm_newstate(fi, DEV_STATE_STARTWAIT_RX);
2223 case DEV_STATE_STARTWAIT_RX:
2224 if (event == DEV_EVENT_TXDOWN)
2225 fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX);
2227 case DEV_STATE_STARTWAIT_TX:
2228 if (event == DEV_EVENT_RXDOWN)
2229 fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX);
2231 case DEV_STATE_STOPWAIT_RXTX:
2232 if (event == DEV_EVENT_TXDOWN)
2233 fsm_newstate(fi, DEV_STATE_STOPWAIT_RX);
2235 fsm_newstate(fi, DEV_STATE_STOPWAIT_TX);
2237 case DEV_STATE_STOPWAIT_RX:
2238 if (event == DEV_EVENT_RXDOWN)
2239 fsm_newstate(fi, DEV_STATE_STOPPED);
2241 case DEV_STATE_STOPWAIT_TX:
2242 if (event == DEV_EVENT_TXDOWN)
2243 fsm_newstate(fi, DEV_STATE_STOPPED);
2247 if (event == DEV_EVENT_RXDOWN)
2248 mpc_channel_action(priv->channel[CTCM_READ],
2249 CTCM_READ, MPC_CHANNEL_REMOVE);
2251 mpc_channel_action(priv->channel[CTCM_WRITE],
2252 CTCM_WRITE, MPC_CHANNEL_REMOVE);
2256 const fsm_node dev_fsm[] = {
2257 { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start },
2258 { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_START, dev_action_start },
2259 { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown },
2260 { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown },
2261 { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart },
2262 { DEV_STATE_STOPWAIT_RX, DEV_EVENT_START, dev_action_start },
2263 { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXUP, dev_action_chup },
2264 { DEV_STATE_STOPWAIT_RX, DEV_EVENT_TXUP, dev_action_chup },
2265 { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXDOWN, dev_action_chdown },
2266 { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RESTART, dev_action_restart },
2267 { DEV_STATE_STOPWAIT_TX, DEV_EVENT_START, dev_action_start },
2268 { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RXUP, dev_action_chup },
2269 { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXUP, dev_action_chup },
2270 { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXDOWN, dev_action_chdown },
2271 { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RESTART, dev_action_restart },
2272 { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_STOP, dev_action_stop },
2273 { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXUP, dev_action_chup },
2274 { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXUP, dev_action_chup },
2275 { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown },
2276 { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown },
2277 { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart },
2278 { DEV_STATE_STARTWAIT_TX, DEV_EVENT_STOP, dev_action_stop },
2279 { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXUP, dev_action_chup },
2280 { DEV_STATE_STARTWAIT_TX, DEV_EVENT_TXUP, dev_action_chup },
2281 { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXDOWN, dev_action_chdown },
2282 { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RESTART, dev_action_restart },
2283 { DEV_STATE_STARTWAIT_RX, DEV_EVENT_STOP, dev_action_stop },
2284 { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RXUP, dev_action_chup },
2285 { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXUP, dev_action_chup },
2286 { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXDOWN, dev_action_chdown },
2287 { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RESTART, dev_action_restart },
2288 { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop },
2289 { DEV_STATE_RUNNING, DEV_EVENT_RXDOWN, dev_action_chdown },
2290 { DEV_STATE_RUNNING, DEV_EVENT_TXDOWN, dev_action_chdown },
2291 { DEV_STATE_RUNNING, DEV_EVENT_TXUP, ctcm_action_nop },
2292 { DEV_STATE_RUNNING, DEV_EVENT_RXUP, ctcm_action_nop },
2293 { DEV_STATE_RUNNING, DEV_EVENT_RESTART, dev_action_restart },
2296 int dev_fsm_len = ARRAY_SIZE(dev_fsm);
2298 /* --- This is the END my friend --- */