1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright IBM Corp. 2001, 2007
4 * Authors: Fritz Elfert (felfert@millenux.com)
5 * Peter Tiedemann (ptiedem@de.ibm.com)
7 * Belinda Thompson (belindat@us.ibm.com)
8 * Andy Richter (richtera@us.ibm.com)
15 #define KMSG_COMPONENT "ctcm"
16 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/kernel.h>
21 #include <linux/slab.h>
22 #include <linux/errno.h>
23 #include <linux/types.h>
24 #include <linux/interrupt.h>
25 #include <linux/timer.h>
26 #include <linux/bitops.h>
28 #include <linux/signal.h>
29 #include <linux/string.h>
32 #include <linux/if_arp.h>
33 #include <linux/tcp.h>
34 #include <linux/skbuff.h>
35 #include <linux/ctype.h>
39 #include <asm/ccwdev.h>
40 #include <asm/ccwgroup.h>
41 #include <linux/uaccess.h>
43 #include <asm/idals.h>
47 #include "ctcm_dbug.h"
48 #include "ctcm_main.h"
49 #include "ctcm_fsms.h"
51 const char *dev_state_names[] = {
52 [DEV_STATE_STOPPED] = "Stopped",
53 [DEV_STATE_STARTWAIT_RXTX] = "StartWait RXTX",
54 [DEV_STATE_STARTWAIT_RX] = "StartWait RX",
55 [DEV_STATE_STARTWAIT_TX] = "StartWait TX",
56 [DEV_STATE_STOPWAIT_RXTX] = "StopWait RXTX",
57 [DEV_STATE_STOPWAIT_RX] = "StopWait RX",
58 [DEV_STATE_STOPWAIT_TX] = "StopWait TX",
59 [DEV_STATE_RUNNING] = "Running",
62 const char *dev_event_names[] = {
63 [DEV_EVENT_START] = "Start",
64 [DEV_EVENT_STOP] = "Stop",
65 [DEV_EVENT_RXUP] = "RX up",
66 [DEV_EVENT_TXUP] = "TX up",
67 [DEV_EVENT_RXDOWN] = "RX down",
68 [DEV_EVENT_TXDOWN] = "TX down",
69 [DEV_EVENT_RESTART] = "Restart",
72 const char *ctc_ch_event_names[] = {
73 [CTC_EVENT_IO_SUCCESS] = "ccw_device success",
74 [CTC_EVENT_IO_EBUSY] = "ccw_device busy",
75 [CTC_EVENT_IO_ENODEV] = "ccw_device enodev",
76 [CTC_EVENT_IO_UNKNOWN] = "ccw_device unknown",
77 [CTC_EVENT_ATTNBUSY] = "Status ATTN & BUSY",
78 [CTC_EVENT_ATTN] = "Status ATTN",
79 [CTC_EVENT_BUSY] = "Status BUSY",
80 [CTC_EVENT_UC_RCRESET] = "Unit check remote reset",
81 [CTC_EVENT_UC_RSRESET] = "Unit check remote system reset",
82 [CTC_EVENT_UC_TXTIMEOUT] = "Unit check TX timeout",
83 [CTC_EVENT_UC_TXPARITY] = "Unit check TX parity",
84 [CTC_EVENT_UC_HWFAIL] = "Unit check Hardware failure",
85 [CTC_EVENT_UC_RXPARITY] = "Unit check RX parity",
86 [CTC_EVENT_UC_ZERO] = "Unit check ZERO",
87 [CTC_EVENT_UC_UNKNOWN] = "Unit check Unknown",
88 [CTC_EVENT_SC_UNKNOWN] = "SubChannel check Unknown",
89 [CTC_EVENT_MC_FAIL] = "Machine check failure",
90 [CTC_EVENT_MC_GOOD] = "Machine check operational",
91 [CTC_EVENT_IRQ] = "IRQ normal",
92 [CTC_EVENT_FINSTAT] = "IRQ final",
93 [CTC_EVENT_TIMER] = "Timer",
94 [CTC_EVENT_START] = "Start",
95 [CTC_EVENT_STOP] = "Stop",
97 * additional MPC events
99 [CTC_EVENT_SEND_XID] = "XID Exchange",
100 [CTC_EVENT_RSWEEP_TIMER] = "MPC Group Sweep Timer",
103 const char *ctc_ch_state_names[] = {
104 [CTC_STATE_IDLE] = "Idle",
105 [CTC_STATE_STOPPED] = "Stopped",
106 [CTC_STATE_STARTWAIT] = "StartWait",
107 [CTC_STATE_STARTRETRY] = "StartRetry",
108 [CTC_STATE_SETUPWAIT] = "SetupWait",
109 [CTC_STATE_RXINIT] = "RX init",
110 [CTC_STATE_TXINIT] = "TX init",
111 [CTC_STATE_RX] = "RX",
112 [CTC_STATE_TX] = "TX",
113 [CTC_STATE_RXIDLE] = "RX idle",
114 [CTC_STATE_TXIDLE] = "TX idle",
115 [CTC_STATE_RXERR] = "RX error",
116 [CTC_STATE_TXERR] = "TX error",
117 [CTC_STATE_TERM] = "Terminating",
118 [CTC_STATE_DTERM] = "Restarting",
119 [CTC_STATE_NOTOP] = "Not operational",
121 * additional MPC states
123 [CH_XID0_PENDING] = "Pending XID0 Start",
124 [CH_XID0_INPROGRESS] = "In XID0 Negotiations ",
125 [CH_XID7_PENDING] = "Pending XID7 P1 Start",
126 [CH_XID7_PENDING1] = "Active XID7 P1 Exchange ",
127 [CH_XID7_PENDING2] = "Pending XID7 P2 Start ",
128 [CH_XID7_PENDING3] = "Active XID7 P2 Exchange ",
129 [CH_XID7_PENDING4] = "XID7 Complete - Pending READY ",
132 static void ctcm_action_nop(fsm_instance *fi, int event, void *arg);
135 * ----- static ctcm actions for channel statemachine -----
138 static void chx_txdone(fsm_instance *fi, int event, void *arg);
139 static void chx_rx(fsm_instance *fi, int event, void *arg);
140 static void chx_rxidle(fsm_instance *fi, int event, void *arg);
141 static void chx_firstio(fsm_instance *fi, int event, void *arg);
142 static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg);
143 static void ctcm_chx_start(fsm_instance *fi, int event, void *arg);
144 static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg);
145 static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg);
146 static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg);
147 static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg);
148 static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg);
149 static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg);
150 static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg);
151 static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg);
152 static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg);
153 static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg);
154 static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg);
155 static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg);
158 * ----- static ctcmpc actions for ctcmpc channel statemachine -----
161 static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg);
162 static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg);
163 static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg);
165 static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg);
166 static void ctcm_chx_start(fsm_instance *fi, int event, void *arg);
167 static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg);
168 static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg);
169 static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg);
170 static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg);
171 static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg);
172 static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg);
173 static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg);
174 static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg);
175 static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg);
176 static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg);
177 static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg);
178 static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg);
180 static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg);
181 static void ctcmpc_chx_attnbusy(fsm_instance *, int, void *);
182 static void ctcmpc_chx_resend(fsm_instance *, int, void *);
183 static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg);
186 * Check return code of a preceding ccw_device call, halt_IO etc...
188 * ch : The channel, the error belongs to.
189 * Returns the error code (!= 0) to inspect.
191 void ctcm_ccw_check_rc(struct channel *ch, int rc, char *msg)
193 CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR,
194 "%s(%s): %s: %04x\n",
195 CTCM_FUNTAIL, ch->id, msg, rc);
198 pr_info("%s: The communication peer is busy\n",
200 fsm_event(ch->fsm, CTC_EVENT_IO_EBUSY, ch);
203 pr_err("%s: The specified target device is not valid\n",
205 fsm_event(ch->fsm, CTC_EVENT_IO_ENODEV, ch);
208 pr_err("An I/O operation resulted in error %04x\n",
210 fsm_event(ch->fsm, CTC_EVENT_IO_UNKNOWN, ch);
214 void ctcm_purge_skb_queue(struct sk_buff_head *q)
218 CTCM_DBF_TEXT(TRACE, CTC_DBF_DEBUG, __func__);
220 while ((skb = skb_dequeue(q))) {
221 refcount_dec(&skb->users);
222 dev_kfree_skb_any(skb);
227 * NOP action for statemachines
229 static void ctcm_action_nop(fsm_instance *fi, int event, void *arg)
234 * Actions for channel - statemachines.
238 * Normal data has been send. Free the corresponding
239 * skb (it's in io_queue), reset dev->tbusy and
240 * revert to idle state.
242 * fi An instance of a channel statemachine.
243 * event The event, just happened.
244 * arg Generic pointer, casted from channel * upon call.
246 static void chx_txdone(fsm_instance *fi, int event, void *arg)
248 struct channel *ch = arg;
249 struct net_device *dev = ch->netdev;
250 struct ctcm_priv *priv = dev->ml_priv;
254 unsigned long duration;
255 unsigned long done_stamp = jiffies;
257 CTCM_PR_DEBUG("%s(%s): %s\n", __func__, ch->id, dev->name);
259 duration = done_stamp - ch->prof.send_stamp;
260 if (duration > ch->prof.tx_time)
261 ch->prof.tx_time = duration;
263 if (ch->irb->scsw.cmd.count != 0)
264 CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG,
265 "%s(%s): TX not complete, remaining %d bytes",
266 CTCM_FUNTAIL, dev->name, ch->irb->scsw.cmd.count);
267 fsm_deltimer(&ch->timer);
268 while ((skb = skb_dequeue(&ch->io_queue))) {
269 priv->stats.tx_packets++;
270 priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH;
272 priv->stats.tx_bytes += 2;
275 refcount_dec(&skb->users);
276 dev_kfree_skb_irq(skb);
278 spin_lock(&ch->collect_lock);
279 clear_normalized_cda(&ch->ccw[4]);
280 if (ch->collect_len > 0) {
283 if (ctcm_checkalloc_buffer(ch)) {
284 spin_unlock(&ch->collect_lock);
287 ch->trans_skb->data = ch->trans_skb_data;
288 skb_reset_tail_pointer(ch->trans_skb);
289 ch->trans_skb->len = 0;
290 if (ch->prof.maxmulti < (ch->collect_len + 2))
291 ch->prof.maxmulti = ch->collect_len + 2;
292 if (ch->prof.maxcqueue < skb_queue_len(&ch->collect_queue))
293 ch->prof.maxcqueue = skb_queue_len(&ch->collect_queue);
294 *((__u16 *)skb_put(ch->trans_skb, 2)) = ch->collect_len + 2;
296 while ((skb = skb_dequeue(&ch->collect_queue))) {
297 skb_copy_from_linear_data(skb,
298 skb_put(ch->trans_skb, skb->len), skb->len);
299 priv->stats.tx_packets++;
300 priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH;
301 refcount_dec(&skb->users);
302 dev_kfree_skb_irq(skb);
306 spin_unlock(&ch->collect_lock);
307 ch->ccw[1].count = ch->trans_skb->len;
308 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
309 ch->prof.send_stamp = jiffies;
310 rc = ccw_device_start(ch->cdev, &ch->ccw[0], 0, 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], 0, 0xff, 0);
421 ctcm_ccw_check_rc(ch, rc, "normal RX");
425 * Initialize connection by sending a __u16 of value 0.
427 * fi An instance of a channel statemachine.
428 * event The event, just happened.
429 * arg Generic pointer, casted from channel * upon call.
431 static void chx_firstio(fsm_instance *fi, int event, void *arg)
434 struct channel *ch = arg;
435 int fsmstate = fsm_getstate(fi);
437 CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE,
439 CTCM_FUNTAIL, ch->id, fsmstate);
441 ch->sense_rc = 0; /* reset unit check report control */
442 if (fsmstate == CTC_STATE_TXIDLE)
443 CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG,
444 "%s(%s): remote side issued READ?, init.\n",
445 CTCM_FUNTAIL, ch->id);
446 fsm_deltimer(&ch->timer);
447 if (ctcm_checkalloc_buffer(ch))
449 if ((fsmstate == CTC_STATE_SETUPWAIT) &&
450 (ch->protocol == CTCM_PROTO_OS390)) {
451 /* OS/390 resp. z/OS */
452 if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) {
453 *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN;
454 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC,
455 CTC_EVENT_TIMER, ch);
456 chx_rxidle(fi, event, arg);
458 struct net_device *dev = ch->netdev;
459 struct ctcm_priv *priv = dev->ml_priv;
460 fsm_newstate(fi, CTC_STATE_TXIDLE);
461 fsm_event(priv->fsm, DEV_EVENT_TXUP, dev);
466 * Don't setup a timer for receiving the initial RX frame
467 * if in compatibility mode, since VM TCP delays the initial
468 * frame until it has some data to send.
470 if ((CHANNEL_DIRECTION(ch->flags) == CTCM_WRITE) ||
471 (ch->protocol != CTCM_PROTO_S390))
472 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
474 *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN;
475 ch->ccw[1].count = 2; /* Transfer only length */
477 fsm_newstate(fi, (CHANNEL_DIRECTION(ch->flags) == CTCM_READ)
478 ? CTC_STATE_RXINIT : CTC_STATE_TXINIT);
479 rc = ccw_device_start(ch->cdev, &ch->ccw[0], 0, 0xff, 0);
481 fsm_deltimer(&ch->timer);
482 fsm_newstate(fi, CTC_STATE_SETUPWAIT);
483 ctcm_ccw_check_rc(ch, rc, "init IO");
486 * If in compatibility mode since we don't setup a timer, we
487 * also signal RX channel up immediately. This enables us
488 * to send packets early which in turn usually triggers some
489 * reply from VM TCP which brings up the RX channel to it's
492 if ((CHANNEL_DIRECTION(ch->flags) == CTCM_READ) &&
493 (ch->protocol == CTCM_PROTO_S390)) {
494 struct net_device *dev = ch->netdev;
495 struct ctcm_priv *priv = dev->ml_priv;
496 fsm_event(priv->fsm, DEV_EVENT_RXUP, dev);
501 * Got initial data, check it. If OK,
502 * notify device statemachine that we are up and
505 * fi An instance of a channel statemachine.
506 * event The event, just happened.
507 * arg Generic pointer, casted from channel * upon call.
509 static void chx_rxidle(fsm_instance *fi, int event, void *arg)
511 struct channel *ch = arg;
512 struct net_device *dev = ch->netdev;
513 struct ctcm_priv *priv = dev->ml_priv;
517 fsm_deltimer(&ch->timer);
518 buflen = *((__u16 *)ch->trans_skb->data);
519 CTCM_PR_DEBUG("%s: %s: Initial RX count = %d\n",
520 __func__, dev->name, buflen);
522 if (buflen >= CTCM_INITIAL_BLOCKLEN) {
523 if (ctcm_checkalloc_buffer(ch))
525 ch->ccw[1].count = ch->max_bufsize;
526 fsm_newstate(fi, CTC_STATE_RXIDLE);
527 rc = ccw_device_start(ch->cdev, &ch->ccw[0], 0, 0xff, 0);
529 fsm_newstate(fi, CTC_STATE_RXINIT);
530 ctcm_ccw_check_rc(ch, rc, "initial RX");
532 fsm_event(priv->fsm, DEV_EVENT_RXUP, dev);
534 CTCM_PR_DEBUG("%s: %s: Initial RX count %d not %d\n",
536 buflen, CTCM_INITIAL_BLOCKLEN);
537 chx_firstio(fi, event, arg);
542 * Set channel into extended mode.
544 * fi An instance of a channel statemachine.
545 * event The event, just happened.
546 * arg Generic pointer, casted from channel * upon call.
548 static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg)
550 struct channel *ch = arg;
552 unsigned long saveflags = 0;
553 int timeout = CTCM_TIME_5_SEC;
555 fsm_deltimer(&ch->timer);
558 CTCM_PR_DEBUG("enter %s: cp=%i ch=0x%p id=%s\n",
559 __func__, smp_processor_id(), ch, ch->id);
561 fsm_addtimer(&ch->timer, timeout, CTC_EVENT_TIMER, ch);
562 fsm_newstate(fi, CTC_STATE_SETUPWAIT);
563 CTCM_CCW_DUMP((char *)&ch->ccw[6], sizeof(struct ccw1) * 2);
565 if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */
566 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
567 /* Such conditional locking is undeterministic in
568 * static view. => ignore sparse warnings here. */
570 rc = ccw_device_start(ch->cdev, &ch->ccw[6], 0, 0xff, 0);
571 if (event == CTC_EVENT_TIMER) /* see above comments */
572 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
574 fsm_deltimer(&ch->timer);
575 fsm_newstate(fi, CTC_STATE_STARTWAIT);
576 ctcm_ccw_check_rc(ch, rc, "set Mode");
584 * fi An instance of a channel statemachine.
585 * event The event, just happened.
586 * arg Generic pointer, casted from channel * upon call.
588 static void ctcm_chx_start(fsm_instance *fi, int event, void *arg)
590 struct channel *ch = arg;
591 unsigned long saveflags;
594 CTCM_DBF_TEXT_(SETUP, CTC_DBF_INFO, "%s(%s): %s",
595 CTCM_FUNTAIL, ch->id,
596 (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? "RX" : "TX");
598 if (ch->trans_skb != NULL) {
599 clear_normalized_cda(&ch->ccw[1]);
600 dev_kfree_skb(ch->trans_skb);
601 ch->trans_skb = NULL;
603 if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) {
604 ch->ccw[1].cmd_code = CCW_CMD_READ;
605 ch->ccw[1].flags = CCW_FLAG_SLI;
606 ch->ccw[1].count = 0;
608 ch->ccw[1].cmd_code = CCW_CMD_WRITE;
609 ch->ccw[1].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
610 ch->ccw[1].count = 0;
612 if (ctcm_checkalloc_buffer(ch)) {
613 CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG,
614 "%s(%s): %s trans_skb alloc delayed "
615 "until first transfer",
616 CTCM_FUNTAIL, ch->id,
617 (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ?
620 ch->ccw[0].cmd_code = CCW_CMD_PREPARE;
621 ch->ccw[0].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
622 ch->ccw[0].count = 0;
624 ch->ccw[2].cmd_code = CCW_CMD_NOOP; /* jointed CE + DE */
625 ch->ccw[2].flags = CCW_FLAG_SLI;
626 ch->ccw[2].count = 0;
628 memcpy(&ch->ccw[3], &ch->ccw[0], sizeof(struct ccw1) * 3);
630 ch->ccw[4].flags &= ~CCW_FLAG_IDA;
632 fsm_newstate(fi, CTC_STATE_STARTWAIT);
633 fsm_addtimer(&ch->timer, 1000, CTC_EVENT_TIMER, ch);
634 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
635 rc = ccw_device_halt(ch->cdev, 0);
636 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
639 fsm_deltimer(&ch->timer);
640 ctcm_ccw_check_rc(ch, rc, "initial HaltIO");
645 * Shutdown a channel.
647 * fi An instance of a channel statemachine.
648 * event The event, just happened.
649 * arg Generic pointer, casted from channel * upon call.
651 static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg)
653 struct channel *ch = arg;
654 unsigned long saveflags = 0;
658 fsm_deltimer(&ch->timer);
660 fsm_deltimer(&ch->sweep_timer);
662 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
664 if (event == CTC_EVENT_STOP) /* only for STOP not yet locked */
665 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
666 /* Such conditional locking is undeterministic in
667 * static view. => ignore sparse warnings here. */
668 oldstate = fsm_getstate(fi);
669 fsm_newstate(fi, CTC_STATE_TERM);
670 rc = ccw_device_halt(ch->cdev, 0);
672 if (event == CTC_EVENT_STOP)
673 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
674 /* see remark above about conditional locking */
676 if (rc != 0 && rc != -EBUSY) {
677 fsm_deltimer(&ch->timer);
678 if (event != CTC_EVENT_STOP) {
679 fsm_newstate(fi, oldstate);
680 ctcm_ccw_check_rc(ch, rc, (char *)__func__);
686 * Cleanup helper for chx_fail and chx_stopped
687 * cleanup channels queue and notify interface statemachine.
689 * fi An instance of a channel statemachine.
690 * state The next state (depending on caller).
691 * ch The channel to operate on.
693 static void ctcm_chx_cleanup(fsm_instance *fi, int state,
696 struct net_device *dev = ch->netdev;
697 struct ctcm_priv *priv = dev->ml_priv;
699 CTCM_DBF_TEXT_(SETUP, CTC_DBF_NOTICE,
701 CTCM_FUNTAIL, dev->name, ch->id, state);
703 fsm_deltimer(&ch->timer);
705 fsm_deltimer(&ch->sweep_timer);
707 fsm_newstate(fi, state);
708 if (state == CTC_STATE_STOPPED && ch->trans_skb != NULL) {
709 clear_normalized_cda(&ch->ccw[1]);
710 dev_kfree_skb_any(ch->trans_skb);
711 ch->trans_skb = NULL;
715 ch->th_seq_num = 0x00;
716 if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) {
717 skb_queue_purge(&ch->io_queue);
718 fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
720 ctcm_purge_skb_queue(&ch->io_queue);
722 ctcm_purge_skb_queue(&ch->sweep_queue);
723 spin_lock(&ch->collect_lock);
724 ctcm_purge_skb_queue(&ch->collect_queue);
726 spin_unlock(&ch->collect_lock);
727 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
732 * A channel has successfully been halted.
733 * Cleanup it's queue and notify interface statemachine.
735 * fi An instance of a channel statemachine.
736 * event The event, just happened.
737 * arg Generic pointer, casted from channel * upon call.
739 static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg)
741 ctcm_chx_cleanup(fi, CTC_STATE_STOPPED, arg);
745 * A stop command from device statemachine arrived and we are in
746 * not operational mode. Set state to stopped.
748 * fi An instance of a channel statemachine.
749 * event The event, just happened.
750 * arg Generic pointer, casted from channel * upon call.
752 static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg)
754 fsm_newstate(fi, CTC_STATE_STOPPED);
758 * A machine check for no path, not operational status or gone device has
760 * Cleanup queue and notify interface statemachine.
762 * fi An instance of a channel statemachine.
763 * event The event, just happened.
764 * arg Generic pointer, casted from channel * upon call.
766 static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg)
768 ctcm_chx_cleanup(fi, CTC_STATE_NOTOP, arg);
772 * Handle error during setup of channel.
774 * fi An instance of a channel statemachine.
775 * event The event, just happened.
776 * arg Generic pointer, casted from channel * upon call.
778 static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg)
780 struct channel *ch = arg;
781 struct net_device *dev = ch->netdev;
782 struct ctcm_priv *priv = dev->ml_priv;
785 * Special case: Got UC_RCRESET on setmode.
786 * This means that remote side isn't setup. In this case
787 * simply retry after some 10 secs...
789 if ((fsm_getstate(fi) == CTC_STATE_SETUPWAIT) &&
790 ((event == CTC_EVENT_UC_RCRESET) ||
791 (event == CTC_EVENT_UC_RSRESET))) {
792 fsm_newstate(fi, CTC_STATE_STARTRETRY);
793 fsm_deltimer(&ch->timer);
794 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
796 (CHANNEL_DIRECTION(ch->flags) == CTCM_READ)) {
797 int rc = ccw_device_halt(ch->cdev, 0);
799 ctcm_ccw_check_rc(ch, rc,
800 "HaltIO in chx_setuperr");
805 CTCM_DBF_TEXT_(ERROR, CTC_DBF_CRIT,
806 "%s(%s) : %s error during %s channel setup state=%s\n",
807 CTCM_FUNTAIL, dev->name, ctc_ch_event_names[event],
808 (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? "RX" : "TX",
809 fsm_getstate_str(fi));
811 if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) {
812 fsm_newstate(fi, CTC_STATE_RXERR);
813 fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
815 fsm_newstate(fi, CTC_STATE_TXERR);
816 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
821 * Restart a channel after an error.
823 * fi An instance of a channel statemachine.
824 * event The event, just happened.
825 * arg Generic pointer, casted from channel * upon call.
827 static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg)
829 struct channel *ch = arg;
830 struct net_device *dev = ch->netdev;
831 unsigned long saveflags = 0;
835 CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE,
836 "%s: %s[%d] of %s\n",
837 CTCM_FUNTAIL, ch->id, event, dev->name);
839 fsm_deltimer(&ch->timer);
841 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
842 oldstate = fsm_getstate(fi);
843 fsm_newstate(fi, CTC_STATE_STARTWAIT);
844 if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */
845 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
846 /* Such conditional locking is a known problem for
847 * sparse because its undeterministic in static view.
848 * Warnings should be ignored here. */
849 rc = ccw_device_halt(ch->cdev, 0);
850 if (event == CTC_EVENT_TIMER)
851 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
854 fsm_deltimer(&ch->timer);
855 fsm_newstate(fi, oldstate);
857 ctcm_ccw_check_rc(ch, rc, "HaltIO in ctcm_chx_restart");
862 * Handle error during RX initial handshake (exchange of
863 * 0-length block header)
865 * fi An instance of a channel statemachine.
866 * event The event, just happened.
867 * arg Generic pointer, casted from channel * upon call.
869 static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg)
871 struct channel *ch = arg;
872 struct net_device *dev = ch->netdev;
873 struct ctcm_priv *priv = dev->ml_priv;
875 if (event == CTC_EVENT_TIMER) {
877 /* TODO : check if MPC deletes timer somewhere */
878 fsm_deltimer(&ch->timer);
880 ctcm_chx_restart(fi, event, arg);
882 fsm_newstate(fi, CTC_STATE_RXERR);
883 fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
886 CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR,
887 "%s(%s): %s in %s", CTCM_FUNTAIL, ch->id,
888 ctc_ch_event_names[event], fsm_getstate_str(fi));
891 "Initialization failed with RX/TX init handshake "
892 "error %s\n", ctc_ch_event_names[event]);
897 * Notify device statemachine if we gave up initialization
900 * fi An instance of a channel statemachine.
901 * event The event, just happened.
902 * arg Generic pointer, casted from channel * upon call.
904 static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg)
906 struct channel *ch = arg;
907 struct net_device *dev = ch->netdev;
908 struct ctcm_priv *priv = dev->ml_priv;
910 CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR,
911 "%s(%s): RX %s busy, init. fail",
912 CTCM_FUNTAIL, dev->name, ch->id);
913 fsm_newstate(fi, CTC_STATE_RXERR);
914 fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
918 * Handle RX Unit check remote reset (remote disconnected)
920 * fi An instance of a channel statemachine.
921 * event The event, just happened.
922 * arg Generic pointer, casted from channel * upon call.
924 static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg)
926 struct channel *ch = arg;
928 struct net_device *dev = ch->netdev;
929 struct ctcm_priv *priv = dev->ml_priv;
931 CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE,
932 "%s: %s: remote disconnect - re-init ...",
933 CTCM_FUNTAIL, dev->name);
934 fsm_deltimer(&ch->timer);
936 * Notify device statemachine
938 fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
939 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
941 fsm_newstate(fi, CTC_STATE_DTERM);
942 ch2 = priv->channel[CTCM_WRITE];
943 fsm_newstate(ch2->fsm, CTC_STATE_DTERM);
945 ccw_device_halt(ch->cdev, 0);
946 ccw_device_halt(ch2->cdev, 0);
950 * Handle error during TX channel initialization.
952 * fi An instance of a channel statemachine.
953 * event The event, just happened.
954 * arg Generic pointer, casted from channel * upon call.
956 static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg)
958 struct channel *ch = arg;
959 struct net_device *dev = ch->netdev;
960 struct ctcm_priv *priv = dev->ml_priv;
962 if (event == CTC_EVENT_TIMER) {
963 fsm_deltimer(&ch->timer);
965 ctcm_chx_restart(fi, event, arg);
967 fsm_newstate(fi, CTC_STATE_TXERR);
968 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
971 CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR,
972 "%s(%s): %s in %s", CTCM_FUNTAIL, ch->id,
973 ctc_ch_event_names[event], fsm_getstate_str(fi));
976 "Initialization failed with RX/TX init handshake "
977 "error %s\n", ctc_ch_event_names[event]);
982 * Handle TX timeout by retrying operation.
984 * fi An instance of a channel statemachine.
985 * event The event, just happened.
986 * arg Generic pointer, casted from channel * upon call.
988 static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg)
990 struct channel *ch = arg;
991 struct net_device *dev = ch->netdev;
992 struct ctcm_priv *priv = dev->ml_priv;
995 CTCM_PR_DEBUG("Enter: %s: cp=%i ch=0x%p id=%s\n",
996 __func__, smp_processor_id(), ch, ch->id);
998 fsm_deltimer(&ch->timer);
999 if (ch->retry++ > 3) {
1000 struct mpc_group *gptr = priv->mpcg;
1001 CTCM_DBF_TEXT_(TRACE, CTC_DBF_INFO,
1002 "%s: %s: retries exceeded",
1003 CTCM_FUNTAIL, ch->id);
1004 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
1005 /* call restart if not MPC or if MPC and mpcg fsm is ready.
1006 use gptr as mpc indicator */
1007 if (!(gptr && (fsm_getstate(gptr->fsm) != MPCG_STATE_READY)))
1008 ctcm_chx_restart(fi, event, arg);
1012 CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG,
1013 "%s : %s: retry %d",
1014 CTCM_FUNTAIL, ch->id, ch->retry);
1015 skb = skb_peek(&ch->io_queue);
1018 unsigned long saveflags = 0;
1019 clear_normalized_cda(&ch->ccw[4]);
1020 ch->ccw[4].count = skb->len;
1021 if (set_normalized_cda(&ch->ccw[4], skb->data)) {
1022 CTCM_DBF_TEXT_(TRACE, CTC_DBF_INFO,
1023 "%s: %s: IDAL alloc failed",
1024 CTCM_FUNTAIL, ch->id);
1025 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
1026 ctcm_chx_restart(fi, event, arg);
1029 fsm_addtimer(&ch->timer, 1000, CTC_EVENT_TIMER, ch);
1030 if (event == CTC_EVENT_TIMER) /* for TIMER not yet locked */
1031 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
1032 /* Such conditional locking is a known problem for
1033 * sparse because its undeterministic in static view.
1034 * Warnings should be ignored here. */
1036 ctcmpc_dumpit((char *)&ch->ccw[3],
1037 sizeof(struct ccw1) * 3);
1039 rc = ccw_device_start(ch->cdev, &ch->ccw[3], 0, 0xff, 0);
1040 if (event == CTC_EVENT_TIMER)
1041 spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev),
1044 fsm_deltimer(&ch->timer);
1045 ctcm_ccw_check_rc(ch, rc, "TX in chx_txretry");
1046 ctcm_purge_skb_queue(&ch->io_queue);
1054 * Handle fatal errors during an I/O command.
1056 * fi An instance of a channel statemachine.
1057 * event The event, just happened.
1058 * arg Generic pointer, casted from channel * upon call.
1060 static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg)
1062 struct channel *ch = arg;
1063 struct net_device *dev = ch->netdev;
1064 struct ctcm_priv *priv = dev->ml_priv;
1065 int rd = CHANNEL_DIRECTION(ch->flags);
1067 fsm_deltimer(&ch->timer);
1068 CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR,
1069 "%s: %s: %s unrecoverable channel error",
1070 CTCM_FUNTAIL, ch->id, rd == CTCM_READ ? "RX" : "TX");
1073 priv->stats.tx_dropped++;
1074 priv->stats.tx_errors++;
1076 if (rd == CTCM_READ) {
1077 fsm_newstate(fi, CTC_STATE_RXERR);
1078 fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev);
1080 fsm_newstate(fi, CTC_STATE_TXERR);
1081 fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev);
1086 * The ctcm statemachine for a channel.
1088 const fsm_node ch_fsm[] = {
1089 { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop },
1090 { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start },
1091 { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop },
1092 { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop },
1094 { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop },
1095 { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop },
1096 { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop },
1097 { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop },
1098 { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start },
1100 { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1101 { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop },
1102 { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
1103 { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr },
1104 { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1105 { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1107 { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio },
1108 { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode },
1109 { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_action_nop },
1110 { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1112 { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1113 { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop },
1114 { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, chx_firstio },
1115 { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1116 { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1117 { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode },
1118 { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1119 { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1121 { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1122 { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop },
1123 { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, chx_rxidle },
1124 { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr },
1125 { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr },
1126 { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr },
1127 { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail },
1128 { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1129 { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, chx_firstio },
1130 { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1132 { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio },
1133 { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop },
1134 { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, chx_rx },
1135 { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc },
1136 { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1137 { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1138 { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, chx_rx },
1140 { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1141 { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop },
1142 { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle },
1143 { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr },
1144 { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr },
1145 { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr },
1146 { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1147 { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1149 { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio },
1150 { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop },
1151 { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, chx_firstio },
1152 { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
1153 { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
1154 { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1155 { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1157 { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop },
1158 { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart },
1159 { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped },
1160 { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
1161 { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
1162 { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1164 { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio },
1165 { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart },
1166 { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
1167 { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
1168 { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
1169 { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1171 { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio },
1172 { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop },
1173 { CTC_STATE_TX, CTC_EVENT_FINSTAT, chx_txdone },
1174 { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_txretry },
1175 { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_txretry },
1176 { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry },
1177 { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1178 { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1180 { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio },
1181 { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio },
1182 { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1183 { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1186 int ch_fsm_len = ARRAY_SIZE(ch_fsm);
1189 * MPC actions for mpc channel statemachine
1190 * handling of MPC protocol requires extra
1191 * statemachine and actions which are prefixed ctcmpc_ .
1192 * The ctc_ch_states and ctc_ch_state_names,
1193 * ctc_ch_events and ctc_ch_event_names share the ctcm definitions
1194 * which are expanded by some elements.
1198 * Actions for mpc channel statemachine.
1202 * Normal data has been send. Free the corresponding
1203 * skb (it's in io_queue), reset dev->tbusy and
1204 * revert to idle state.
1206 * fi An instance of a channel statemachine.
1207 * event The event, just happened.
1208 * arg Generic pointer, casted from channel * upon call.
1210 static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg)
1212 struct channel *ch = arg;
1213 struct net_device *dev = ch->netdev;
1214 struct ctcm_priv *priv = dev->ml_priv;
1215 struct mpc_group *grp = priv->mpcg;
1216 struct sk_buff *skb;
1220 unsigned long duration;
1221 struct sk_buff *peekskb;
1223 struct th_header *header;
1224 struct pdu *p_header;
1225 unsigned long done_stamp = jiffies;
1227 CTCM_PR_DEBUG("Enter %s: %s cp:%i\n",
1228 __func__, dev->name, smp_processor_id());
1230 duration = done_stamp - ch->prof.send_stamp;
1231 if (duration > ch->prof.tx_time)
1232 ch->prof.tx_time = duration;
1234 if (ch->irb->scsw.cmd.count != 0)
1235 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG,
1236 "%s(%s): TX not complete, remaining %d bytes",
1237 CTCM_FUNTAIL, dev->name, ch->irb->scsw.cmd.count);
1238 fsm_deltimer(&ch->timer);
1239 while ((skb = skb_dequeue(&ch->io_queue))) {
1240 priv->stats.tx_packets++;
1241 priv->stats.tx_bytes += skb->len - TH_HEADER_LENGTH;
1243 priv->stats.tx_bytes += 2;
1246 refcount_dec(&skb->users);
1247 dev_kfree_skb_irq(skb);
1249 spin_lock(&ch->collect_lock);
1250 clear_normalized_cda(&ch->ccw[4]);
1251 if ((ch->collect_len <= 0) || (grp->in_sweep != 0)) {
1252 spin_unlock(&ch->collect_lock);
1253 fsm_newstate(fi, CTC_STATE_TXIDLE);
1257 if (ctcm_checkalloc_buffer(ch)) {
1258 spin_unlock(&ch->collect_lock);
1261 ch->trans_skb->data = ch->trans_skb_data;
1262 skb_reset_tail_pointer(ch->trans_skb);
1263 ch->trans_skb->len = 0;
1264 if (ch->prof.maxmulti < (ch->collect_len + TH_HEADER_LENGTH))
1265 ch->prof.maxmulti = ch->collect_len + TH_HEADER_LENGTH;
1266 if (ch->prof.maxcqueue < skb_queue_len(&ch->collect_queue))
1267 ch->prof.maxcqueue = skb_queue_len(&ch->collect_queue);
1270 data_space = grp->group_max_buflen - TH_HEADER_LENGTH;
1272 CTCM_PR_DBGDATA("%s: building trans_skb from collect_q"
1273 " data_space:%04x\n",
1274 __func__, data_space);
1276 while ((skb = skb_dequeue(&ch->collect_queue))) {
1277 skb_put_data(ch->trans_skb, skb->data, skb->len);
1278 p_header = (struct pdu *)
1279 (skb_tail_pointer(ch->trans_skb) - skb->len);
1280 p_header->pdu_flag = 0x00;
1281 if (be16_to_cpu(skb->protocol) == ETH_P_SNAP)
1282 p_header->pdu_flag |= 0x60;
1284 p_header->pdu_flag |= 0x20;
1286 CTCM_PR_DBGDATA("%s: trans_skb len:%04x \n",
1287 __func__, ch->trans_skb->len);
1288 CTCM_PR_DBGDATA("%s: pdu header and data for up"
1289 " to 32 bytes sent to vtam\n", __func__);
1290 CTCM_D3_DUMP((char *)p_header, min_t(int, skb->len, 32));
1292 ch->collect_len -= skb->len;
1293 data_space -= skb->len;
1294 priv->stats.tx_packets++;
1295 priv->stats.tx_bytes += skb->len;
1296 refcount_dec(&skb->users);
1297 dev_kfree_skb_any(skb);
1298 peekskb = skb_peek(&ch->collect_queue);
1299 if (peekskb->len > data_space)
1303 /* p_header points to the last one we handled */
1305 p_header->pdu_flag |= PDU_LAST; /*Say it's the last one*/
1307 header = skb_push(ch->trans_skb, TH_HEADER_LENGTH);
1308 memset(header, 0, TH_HEADER_LENGTH);
1310 header->th_ch_flag = TH_HAS_PDU; /* Normal data */
1312 header->th_seq_num = ch->th_seq_num;
1314 CTCM_PR_DBGDATA("%s: ToVTAM_th_seq= %08x\n" ,
1315 __func__, ch->th_seq_num);
1317 CTCM_PR_DBGDATA("%s: trans_skb len:%04x \n",
1318 __func__, ch->trans_skb->len);
1319 CTCM_PR_DBGDATA("%s: up-to-50 bytes of trans_skb "
1320 "data to vtam from collect_q\n", __func__);
1321 CTCM_D3_DUMP((char *)ch->trans_skb->data,
1322 min_t(int, ch->trans_skb->len, 50));
1324 spin_unlock(&ch->collect_lock);
1325 clear_normalized_cda(&ch->ccw[1]);
1327 CTCM_PR_DBGDATA("ccwcda=0x%p data=0x%p\n",
1328 (void *)(unsigned long)ch->ccw[1].cda,
1329 ch->trans_skb->data);
1330 ch->ccw[1].count = ch->max_bufsize;
1332 if (set_normalized_cda(&ch->ccw[1], ch->trans_skb->data)) {
1333 dev_kfree_skb_any(ch->trans_skb);
1334 ch->trans_skb = NULL;
1335 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ERROR,
1336 "%s: %s: IDAL alloc failed",
1337 CTCM_FUNTAIL, ch->id);
1338 fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev);
1342 CTCM_PR_DBGDATA("ccwcda=0x%p data=0x%p\n",
1343 (void *)(unsigned long)ch->ccw[1].cda,
1344 ch->trans_skb->data);
1346 ch->ccw[1].count = ch->trans_skb->len;
1347 fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch);
1348 ch->prof.send_stamp = jiffies;
1350 ctcmpc_dumpit((char *)&ch->ccw[0], sizeof(struct ccw1) * 3);
1351 rc = ccw_device_start(ch->cdev, &ch->ccw[0], 0, 0xff, 0);
1352 ch->prof.doios_multi++;
1354 priv->stats.tx_dropped += i;
1355 priv->stats.tx_errors += i;
1356 fsm_deltimer(&ch->timer);
1357 ctcm_ccw_check_rc(ch, rc, "chained TX");
1360 ctcm_clear_busy(dev);
1365 * Got normal data, check for sanity, queue it up, allocate new buffer
1366 * trigger bottom half, and initiate next read.
1368 * fi An instance of a channel statemachine.
1369 * event The event, just happened.
1370 * arg Generic pointer, casted from channel * upon call.
1372 static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg)
1374 struct channel *ch = arg;
1375 struct net_device *dev = ch->netdev;
1376 struct ctcm_priv *priv = dev->ml_priv;
1377 struct mpc_group *grp = priv->mpcg;
1378 struct sk_buff *skb = ch->trans_skb;
1379 struct sk_buff *new_skb;
1380 unsigned long saveflags = 0; /* avoids compiler warning */
1381 int len = ch->max_bufsize - ch->irb->scsw.cmd.count;
1383 CTCM_PR_DEBUG("%s: %s: cp:%i %s maxbuf : %04x, len: %04x\n",
1384 CTCM_FUNTAIL, dev->name, smp_processor_id(),
1385 ch->id, ch->max_bufsize, len);
1386 fsm_deltimer(&ch->timer);
1389 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1390 "%s(%s): TRANS_SKB = NULL",
1391 CTCM_FUNTAIL, dev->name);
1395 if (len < TH_HEADER_LENGTH) {
1396 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1397 "%s(%s): packet length %d to short",
1398 CTCM_FUNTAIL, dev->name, len);
1399 priv->stats.rx_dropped++;
1400 priv->stats.rx_length_errors++;
1402 /* must have valid th header or game over */
1403 __u32 block_len = len;
1404 len = TH_HEADER_LENGTH + XID2_LENGTH + 4;
1405 new_skb = __dev_alloc_skb(ch->max_bufsize, GFP_ATOMIC);
1407 if (new_skb == NULL) {
1408 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1409 "%s(%d): skb allocation failed",
1410 CTCM_FUNTAIL, dev->name);
1411 fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev);
1414 switch (fsm_getstate(grp->fsm)) {
1415 case MPCG_STATE_RESET:
1416 case MPCG_STATE_INOP:
1417 dev_kfree_skb_any(new_skb);
1419 case MPCG_STATE_FLOWC:
1420 case MPCG_STATE_READY:
1421 skb_put_data(new_skb, skb->data, block_len);
1422 skb_queue_tail(&ch->io_queue, new_skb);
1423 tasklet_schedule(&ch->ch_tasklet);
1426 skb_put_data(new_skb, skb->data, len);
1427 skb_queue_tail(&ch->io_queue, new_skb);
1428 tasklet_hi_schedule(&ch->ch_tasklet);
1434 switch (fsm_getstate(grp->fsm)) {
1436 case MPCG_STATE_FLOWC:
1437 case MPCG_STATE_READY:
1438 if (ctcm_checkalloc_buffer(ch))
1440 ch->trans_skb->data = ch->trans_skb_data;
1441 skb_reset_tail_pointer(ch->trans_skb);
1442 ch->trans_skb->len = 0;
1443 ch->ccw[1].count = ch->max_bufsize;
1445 ctcmpc_dumpit((char *)&ch->ccw[0],
1446 sizeof(struct ccw1) * 3);
1450 get_ccwdev_lock(ch->cdev), saveflags);
1451 rc = ccw_device_start(ch->cdev, &ch->ccw[0], 0, 0xff, 0);
1452 if (dolock) /* see remark about conditional locking */
1453 spin_unlock_irqrestore(
1454 get_ccwdev_lock(ch->cdev), saveflags);
1456 ctcm_ccw_check_rc(ch, rc, "normal RX");
1461 CTCM_PR_DEBUG("Exit %s: %s, ch=0x%p, id=%s\n",
1462 __func__, dev->name, ch, ch->id);
1467 * Initialize connection by sending a __u16 of value 0.
1469 * fi An instance of a channel statemachine.
1470 * event The event, just happened.
1471 * arg Generic pointer, casted from channel * upon call.
1473 static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg)
1475 struct channel *ch = arg;
1476 struct net_device *dev = ch->netdev;
1477 struct ctcm_priv *priv = dev->ml_priv;
1478 struct mpc_group *gptr = priv->mpcg;
1480 CTCM_PR_DEBUG("Enter %s: id=%s, ch=0x%p\n",
1481 __func__, ch->id, ch);
1483 CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_INFO,
1484 "%s: %s: chstate:%i, grpstate:%i, prot:%i\n",
1485 CTCM_FUNTAIL, ch->id, fsm_getstate(fi),
1486 fsm_getstate(gptr->fsm), ch->protocol);
1488 if (fsm_getstate(fi) == CTC_STATE_TXIDLE)
1489 MPC_DBF_DEV_NAME(TRACE, dev, "remote side issued READ? ");
1491 fsm_deltimer(&ch->timer);
1492 if (ctcm_checkalloc_buffer(ch))
1495 switch (fsm_getstate(fi)) {
1496 case CTC_STATE_STARTRETRY:
1497 case CTC_STATE_SETUPWAIT:
1498 if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) {
1499 ctcmpc_chx_rxidle(fi, event, arg);
1501 fsm_newstate(fi, CTC_STATE_TXIDLE);
1502 fsm_event(priv->fsm, DEV_EVENT_TXUP, dev);
1509 fsm_newstate(fi, (CHANNEL_DIRECTION(ch->flags) == CTCM_READ)
1510 ? CTC_STATE_RXINIT : CTC_STATE_TXINIT);
1513 CTCM_PR_DEBUG("Exit %s: id=%s, ch=0x%p\n",
1514 __func__, ch->id, ch);
1519 * Got initial data, check it. If OK,
1520 * notify device statemachine that we are up and
1523 * fi An instance of a channel statemachine.
1524 * event The event, just happened.
1525 * arg Generic pointer, casted from channel * upon call.
1527 void ctcmpc_chx_rxidle(fsm_instance *fi, int event, void *arg)
1529 struct channel *ch = arg;
1530 struct net_device *dev = ch->netdev;
1531 struct ctcm_priv *priv = dev->ml_priv;
1532 struct mpc_group *grp = priv->mpcg;
1534 unsigned long saveflags = 0; /* avoids compiler warning */
1536 fsm_deltimer(&ch->timer);
1537 CTCM_PR_DEBUG("%s: %s: %s: cp:%i, chstate:%i grpstate:%i\n",
1538 __func__, ch->id, dev->name, smp_processor_id(),
1539 fsm_getstate(fi), fsm_getstate(grp->fsm));
1541 fsm_newstate(fi, CTC_STATE_RXIDLE);
1542 /* XID processing complete */
1544 switch (fsm_getstate(grp->fsm)) {
1545 case MPCG_STATE_FLOWC:
1546 case MPCG_STATE_READY:
1547 if (ctcm_checkalloc_buffer(ch))
1549 ch->trans_skb->data = ch->trans_skb_data;
1550 skb_reset_tail_pointer(ch->trans_skb);
1551 ch->trans_skb->len = 0;
1552 ch->ccw[1].count = ch->max_bufsize;
1553 CTCM_CCW_DUMP((char *)&ch->ccw[0], sizeof(struct ccw1) * 3);
1554 if (event == CTC_EVENT_START)
1555 /* see remark about conditional locking */
1556 spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
1557 rc = ccw_device_start(ch->cdev, &ch->ccw[0], 0, 0xff, 0);
1558 if (event == CTC_EVENT_START)
1559 spin_unlock_irqrestore(
1560 get_ccwdev_lock(ch->cdev), saveflags);
1562 fsm_newstate(fi, CTC_STATE_RXINIT);
1563 ctcm_ccw_check_rc(ch, rc, "initial RX");
1571 fsm_event(priv->fsm, DEV_EVENT_RXUP, dev);
1577 * ctcmpc channel FSM action
1578 * called from several points in ctcmpc_ch_fsm
1581 static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg)
1583 struct channel *ch = arg;
1584 struct net_device *dev = ch->netdev;
1585 struct ctcm_priv *priv = dev->ml_priv;
1586 struct mpc_group *grp = priv->mpcg;
1588 CTCM_PR_DEBUG("%s(%s): %s(ch=0x%p), cp=%i, ChStat:%s, GrpStat:%s\n",
1589 __func__, dev->name, ch->id, ch, smp_processor_id(),
1590 fsm_getstate_str(ch->fsm), fsm_getstate_str(grp->fsm));
1592 switch (fsm_getstate(grp->fsm)) {
1593 case MPCG_STATE_XID2INITW:
1594 /* ok..start yside xid exchanges */
1595 if (!ch->in_mpcgroup)
1597 if (fsm_getstate(ch->fsm) == CH_XID0_PENDING) {
1598 fsm_deltimer(&grp->timer);
1599 fsm_addtimer(&grp->timer,
1600 MPC_XID_TIMEOUT_VALUE,
1601 MPCG_EVENT_TIMER, dev);
1602 fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch);
1604 } else if (fsm_getstate(ch->fsm) < CH_XID7_PENDING1)
1605 /* attn rcvd before xid0 processed via bh */
1606 fsm_newstate(ch->fsm, CH_XID7_PENDING1);
1608 case MPCG_STATE_XID2INITX:
1609 case MPCG_STATE_XID0IOWAIT:
1610 case MPCG_STATE_XID0IOWAIX:
1611 /* attn rcvd before xid0 processed on ch
1612 but mid-xid0 processing for group */
1613 if (fsm_getstate(ch->fsm) < CH_XID7_PENDING1)
1614 fsm_newstate(ch->fsm, CH_XID7_PENDING1);
1616 case MPCG_STATE_XID7INITW:
1617 case MPCG_STATE_XID7INITX:
1618 case MPCG_STATE_XID7INITI:
1619 case MPCG_STATE_XID7INITZ:
1620 switch (fsm_getstate(ch->fsm)) {
1621 case CH_XID7_PENDING:
1622 fsm_newstate(ch->fsm, CH_XID7_PENDING1);
1624 case CH_XID7_PENDING2:
1625 fsm_newstate(ch->fsm, CH_XID7_PENDING3);
1628 fsm_event(grp->fsm, MPCG_EVENT_XID7DONE, dev);
1636 * ctcmpc channel FSM action
1637 * called from one point in ctcmpc_ch_fsm
1640 static void ctcmpc_chx_attnbusy(fsm_instance *fsm, int event, void *arg)
1642 struct channel *ch = arg;
1643 struct net_device *dev = ch->netdev;
1644 struct ctcm_priv *priv = dev->ml_priv;
1645 struct mpc_group *grp = priv->mpcg;
1647 CTCM_PR_DEBUG("%s(%s): %s\n ChState:%s GrpState:%s\n",
1648 __func__, dev->name, ch->id,
1649 fsm_getstate_str(ch->fsm), fsm_getstate_str(grp->fsm));
1651 fsm_deltimer(&ch->timer);
1653 switch (fsm_getstate(grp->fsm)) {
1654 case MPCG_STATE_XID0IOWAIT:
1655 /* vtam wants to be primary.start yside xid exchanges*/
1656 /* only receive one attn-busy at a time so must not */
1657 /* change state each time */
1658 grp->changed_side = 1;
1659 fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW);
1661 case MPCG_STATE_XID2INITW:
1662 if (grp->changed_side == 1) {
1663 grp->changed_side = 2;
1666 /* process began via call to establish_conn */
1667 /* so must report failure instead of reverting */
1668 /* back to ready-for-xid passive state */
1669 if (grp->estconnfunc)
1671 /* this attnbusy is NOT the result of xside xid */
1672 /* collisions so yside must have been triggered */
1673 /* by an ATTN that was not intended to start XID */
1674 /* processing. Revert back to ready-for-xid and */
1675 /* wait for ATTN interrupt to signal xid start */
1676 if (fsm_getstate(ch->fsm) == CH_XID0_INPROGRESS) {
1677 fsm_newstate(ch->fsm, CH_XID0_PENDING) ;
1678 fsm_deltimer(&grp->timer);
1681 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1683 case MPCG_STATE_XID2INITX:
1684 /* XID2 was received before ATTN Busy for second
1685 channel.Send yside xid for second channel.
1687 if (grp->changed_side == 1) {
1688 grp->changed_side = 2;
1692 case MPCG_STATE_XID0IOWAIX:
1693 case MPCG_STATE_XID7INITW:
1694 case MPCG_STATE_XID7INITX:
1695 case MPCG_STATE_XID7INITI:
1696 case MPCG_STATE_XID7INITZ:
1698 /* multiple attn-busy indicates too out-of-sync */
1699 /* and they are certainly not being received as part */
1700 /* of valid mpc group negotiations.. */
1701 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1705 if (grp->changed_side == 1) {
1706 fsm_deltimer(&grp->timer);
1707 fsm_addtimer(&grp->timer, MPC_XID_TIMEOUT_VALUE,
1708 MPCG_EVENT_TIMER, dev);
1710 if (ch->in_mpcgroup)
1711 fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch);
1713 CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
1714 "%s(%s): channel %s not added to group",
1715 CTCM_FUNTAIL, dev->name, ch->id);
1722 * ctcmpc channel FSM action
1723 * called from several points in ctcmpc_ch_fsm
1726 static void ctcmpc_chx_resend(fsm_instance *fsm, int event, void *arg)
1728 struct channel *ch = arg;
1729 struct net_device *dev = ch->netdev;
1730 struct ctcm_priv *priv = dev->ml_priv;
1731 struct mpc_group *grp = priv->mpcg;
1733 fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch);
1738 * ctcmpc channel FSM action
1739 * called from several points in ctcmpc_ch_fsm
1742 static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg)
1744 struct channel *ach = arg;
1745 struct net_device *dev = ach->netdev;
1746 struct ctcm_priv *priv = dev->ml_priv;
1747 struct mpc_group *grp = priv->mpcg;
1748 struct channel *wch = priv->channel[CTCM_WRITE];
1749 struct channel *rch = priv->channel[CTCM_READ];
1750 struct sk_buff *skb;
1751 struct th_sweep *header;
1753 unsigned long saveflags = 0;
1755 CTCM_PR_DEBUG("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s\n",
1756 __func__, smp_processor_id(), ach, ach->id);
1758 if (grp->in_sweep == 0)
1761 CTCM_PR_DBGDATA("%s: 1: ToVTAM_th_seq= %08x\n" ,
1762 __func__, wch->th_seq_num);
1763 CTCM_PR_DBGDATA("%s: 1: FromVTAM_th_seq= %08x\n" ,
1764 __func__, rch->th_seq_num);
1766 if (fsm_getstate(wch->fsm) != CTC_STATE_TXIDLE) {
1767 /* give the previous IO time to complete */
1768 fsm_addtimer(&wch->sweep_timer,
1769 200, CTC_EVENT_RSWEEP_TIMER, wch);
1773 skb = skb_dequeue(&wch->sweep_queue);
1777 if (set_normalized_cda(&wch->ccw[4], skb->data)) {
1779 ctcm_clear_busy_do(dev);
1780 dev_kfree_skb_any(skb);
1781 fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
1784 refcount_inc(&skb->users);
1785 skb_queue_tail(&wch->io_queue, skb);
1788 /* send out the sweep */
1789 wch->ccw[4].count = skb->len;
1791 header = (struct th_sweep *)skb->data;
1792 switch (header->th.th_ch_flag) {
1794 grp->sweep_req_pend_num--;
1797 grp->sweep_rsp_pend_num--;
1801 header->sw.th_last_seq = wch->th_seq_num;
1803 CTCM_CCW_DUMP((char *)&wch->ccw[3], sizeof(struct ccw1) * 3);
1804 CTCM_PR_DBGDATA("%s: sweep packet\n", __func__);
1805 CTCM_D3_DUMP((char *)header, TH_SWEEP_LENGTH);
1807 fsm_addtimer(&wch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, wch);
1808 fsm_newstate(wch->fsm, CTC_STATE_TX);
1810 spin_lock_irqsave(get_ccwdev_lock(wch->cdev), saveflags);
1811 wch->prof.send_stamp = jiffies;
1812 rc = ccw_device_start(wch->cdev, &wch->ccw[3], 0, 0xff, 0);
1813 spin_unlock_irqrestore(get_ccwdev_lock(wch->cdev), saveflags);
1815 if ((grp->sweep_req_pend_num == 0) &&
1816 (grp->sweep_rsp_pend_num == 0)) {
1818 rch->th_seq_num = 0x00;
1819 wch->th_seq_num = 0x00;
1820 ctcm_clear_busy_do(dev);
1823 CTCM_PR_DBGDATA("%s: To-/From-VTAM_th_seq = %08x/%08x\n" ,
1824 __func__, wch->th_seq_num, rch->th_seq_num);
1827 ctcm_ccw_check_rc(wch, rc, "send sweep");
1835 * The ctcmpc statemachine for a channel.
1838 const fsm_node ctcmpc_ch_fsm[] = {
1839 { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop },
1840 { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start },
1841 { CTC_STATE_STOPPED, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1842 { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop },
1843 { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop },
1845 { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop },
1846 { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop },
1847 { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop },
1848 { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop },
1849 { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start },
1850 { CTC_STATE_NOTOP, CTC_EVENT_UC_RCRESET, ctcm_chx_stop },
1851 { CTC_STATE_NOTOP, CTC_EVENT_UC_RSRESET, ctcm_chx_stop },
1852 { CTC_STATE_NOTOP, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1854 { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1855 { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop },
1856 { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
1857 { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr },
1858 { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1859 { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1861 { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio },
1862 { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode },
1863 { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
1864 { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1865 { CTC_STATE_STARTRETRY, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1867 { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1868 { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop },
1869 { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio },
1870 { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1871 { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1872 { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode },
1873 { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1874 { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1876 { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1877 { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop },
1878 { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, ctcmpc_chx_rxidle },
1879 { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr },
1880 { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr },
1881 { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr },
1882 { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail },
1883 { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1884 { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, ctcmpc_chx_firstio },
1885 { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1887 { CH_XID0_PENDING, CTC_EVENT_FINSTAT, ctcm_action_nop },
1888 { CH_XID0_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1889 { CH_XID0_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio },
1890 { CH_XID0_PENDING, CTC_EVENT_START, ctcm_action_nop },
1891 { CH_XID0_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1892 { CH_XID0_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1893 { CH_XID0_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1894 { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1895 { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1896 { CH_XID0_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
1898 { CH_XID0_INPROGRESS, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1899 { CH_XID0_INPROGRESS, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1900 { CH_XID0_INPROGRESS, CTC_EVENT_STOP, ctcm_chx_haltio },
1901 { CH_XID0_INPROGRESS, CTC_EVENT_START, ctcm_action_nop },
1902 { CH_XID0_INPROGRESS, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1903 { CH_XID0_INPROGRESS, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1904 { CH_XID0_INPROGRESS, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1905 { CH_XID0_INPROGRESS, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1906 { CH_XID0_INPROGRESS, CTC_EVENT_ATTNBUSY, ctcmpc_chx_attnbusy },
1907 { CH_XID0_INPROGRESS, CTC_EVENT_TIMER, ctcmpc_chx_resend },
1908 { CH_XID0_INPROGRESS, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
1910 { CH_XID7_PENDING, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1911 { CH_XID7_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1912 { CH_XID7_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio },
1913 { CH_XID7_PENDING, CTC_EVENT_START, ctcm_action_nop },
1914 { CH_XID7_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1915 { CH_XID7_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1916 { CH_XID7_PENDING, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1917 { CH_XID7_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1918 { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1919 { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1920 { CH_XID7_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
1921 { CH_XID7_PENDING, CTC_EVENT_TIMER, ctcmpc_chx_resend },
1922 { CH_XID7_PENDING, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
1924 { CH_XID7_PENDING1, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1925 { CH_XID7_PENDING1, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1926 { CH_XID7_PENDING1, CTC_EVENT_STOP, ctcm_chx_haltio },
1927 { CH_XID7_PENDING1, CTC_EVENT_START, ctcm_action_nop },
1928 { CH_XID7_PENDING1, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1929 { CH_XID7_PENDING1, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1930 { CH_XID7_PENDING1, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1931 { CH_XID7_PENDING1, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1932 { CH_XID7_PENDING1, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1933 { CH_XID7_PENDING1, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
1934 { CH_XID7_PENDING1, CTC_EVENT_TIMER, ctcmpc_chx_resend },
1935 { CH_XID7_PENDING1, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
1937 { CH_XID7_PENDING2, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1938 { CH_XID7_PENDING2, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1939 { CH_XID7_PENDING2, CTC_EVENT_STOP, ctcm_chx_haltio },
1940 { CH_XID7_PENDING2, CTC_EVENT_START, ctcm_action_nop },
1941 { CH_XID7_PENDING2, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1942 { CH_XID7_PENDING2, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1943 { CH_XID7_PENDING2, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1944 { CH_XID7_PENDING2, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1945 { CH_XID7_PENDING2, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1946 { CH_XID7_PENDING2, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
1947 { CH_XID7_PENDING2, CTC_EVENT_TIMER, ctcmpc_chx_resend },
1948 { CH_XID7_PENDING2, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
1950 { CH_XID7_PENDING3, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1951 { CH_XID7_PENDING3, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1952 { CH_XID7_PENDING3, CTC_EVENT_STOP, ctcm_chx_haltio },
1953 { CH_XID7_PENDING3, CTC_EVENT_START, ctcm_action_nop },
1954 { CH_XID7_PENDING3, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1955 { CH_XID7_PENDING3, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1956 { CH_XID7_PENDING3, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1957 { CH_XID7_PENDING3, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1958 { CH_XID7_PENDING3, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1959 { CH_XID7_PENDING3, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
1960 { CH_XID7_PENDING3, CTC_EVENT_TIMER, ctcmpc_chx_resend },
1961 { CH_XID7_PENDING3, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
1963 { CH_XID7_PENDING4, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1964 { CH_XID7_PENDING4, CTC_EVENT_ATTN, ctcmpc_chx_attn },
1965 { CH_XID7_PENDING4, CTC_EVENT_STOP, ctcm_chx_haltio },
1966 { CH_XID7_PENDING4, CTC_EVENT_START, ctcm_action_nop },
1967 { CH_XID7_PENDING4, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1968 { CH_XID7_PENDING4, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1969 { CH_XID7_PENDING4, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1970 { CH_XID7_PENDING4, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr },
1971 { CH_XID7_PENDING4, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr },
1972 { CH_XID7_PENDING4, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal },
1973 { CH_XID7_PENDING4, CTC_EVENT_TIMER, ctcmpc_chx_resend },
1974 { CH_XID7_PENDING4, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
1976 { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio },
1977 { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop },
1978 { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_rx },
1979 { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc },
1980 { CTC_STATE_RXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail },
1981 { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1982 { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1983 { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx },
1985 { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio },
1986 { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop },
1987 { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle },
1988 { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr },
1989 { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr },
1990 { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr },
1991 { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
1992 { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
1993 { CTC_STATE_TXINIT, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep },
1995 { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio },
1996 { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop },
1997 { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio },
1998 { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_fail },
1999 { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail },
2000 { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
2001 { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2002 { CTC_STATE_TXIDLE, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep },
2004 { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop },
2005 { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart },
2006 { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped },
2007 { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
2008 { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
2009 { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2010 { CTC_STATE_TERM, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
2011 { CTC_STATE_TERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
2013 { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio },
2014 { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart },
2015 { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode },
2016 { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop },
2017 { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop },
2018 { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2019 { CTC_STATE_DTERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
2021 { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio },
2022 { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop },
2023 { CTC_STATE_TX, CTC_EVENT_FINSTAT, ctcmpc_chx_txdone },
2024 { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_fail },
2025 { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_fail },
2026 { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry },
2027 { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
2028 { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2029 { CTC_STATE_TX, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep },
2030 { CTC_STATE_TX, CTC_EVENT_IO_EBUSY, ctcm_chx_fail },
2032 { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio },
2033 { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio },
2034 { CTC_STATE_TXERR, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal },
2035 { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2036 { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail },
2039 int mpc_ch_fsm_len = ARRAY_SIZE(ctcmpc_ch_fsm);
2042 * Actions for interface - statemachine.
2046 * Startup channels by sending CTC_EVENT_START to each channel.
2048 * fi An instance of an interface statemachine.
2049 * event The event, just happened.
2050 * arg Generic pointer, casted from struct net_device * upon call.
2052 static void dev_action_start(fsm_instance *fi, int event, void *arg)
2054 struct net_device *dev = arg;
2055 struct ctcm_priv *priv = dev->ml_priv;
2058 CTCMY_DBF_DEV_NAME(SETUP, dev, "");
2060 fsm_deltimer(&priv->restart_timer);
2061 fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX);
2063 priv->mpcg->channels_terminating = 0;
2064 for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) {
2065 struct channel *ch = priv->channel[direction];
2066 fsm_event(ch->fsm, CTC_EVENT_START, ch);
2071 * Shutdown channels by sending CTC_EVENT_STOP to each channel.
2073 * fi An instance of an interface statemachine.
2074 * event The event, just happened.
2075 * arg Generic pointer, casted from struct net_device * upon call.
2077 static void dev_action_stop(fsm_instance *fi, int event, void *arg)
2080 struct net_device *dev = arg;
2081 struct ctcm_priv *priv = dev->ml_priv;
2083 CTCMY_DBF_DEV_NAME(SETUP, dev, "");
2085 fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX);
2086 for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) {
2087 struct channel *ch = priv->channel[direction];
2088 fsm_event(ch->fsm, CTC_EVENT_STOP, ch);
2089 ch->th_seq_num = 0x00;
2090 CTCM_PR_DEBUG("%s: CH_th_seq= %08x\n",
2091 __func__, ch->th_seq_num);
2094 fsm_newstate(priv->mpcg->fsm, MPCG_STATE_RESET);
2097 static void dev_action_restart(fsm_instance *fi, int event, void *arg)
2100 struct net_device *dev = arg;
2101 struct ctcm_priv *priv = dev->ml_priv;
2103 CTCMY_DBF_DEV_NAME(TRACE, dev, "");
2106 restart_timer = CTCM_TIME_1_SEC;
2108 restart_timer = CTCM_TIME_5_SEC;
2110 dev_info(&dev->dev, "Restarting device\n");
2112 dev_action_stop(fi, event, arg);
2113 fsm_event(priv->fsm, DEV_EVENT_STOP, dev);
2115 fsm_newstate(priv->mpcg->fsm, MPCG_STATE_RESET);
2117 /* going back into start sequence too quickly can */
2118 /* result in the other side becoming unreachable due */
2119 /* to sense reported when IO is aborted */
2120 fsm_addtimer(&priv->restart_timer, restart_timer,
2121 DEV_EVENT_START, dev);
2125 * Called from channel statemachine
2126 * when a channel is up and running.
2128 * fi An instance of an interface statemachine.
2129 * event The event, just happened.
2130 * arg Generic pointer, casted from struct net_device * upon call.
2132 static void dev_action_chup(fsm_instance *fi, int event, void *arg)
2134 struct net_device *dev = arg;
2135 struct ctcm_priv *priv = dev->ml_priv;
2136 int dev_stat = fsm_getstate(fi);
2138 CTCM_DBF_TEXT_(SETUP, CTC_DBF_NOTICE,
2139 "%s(%s): priv = %p [%d,%d]\n ", CTCM_FUNTAIL,
2140 dev->name, dev->ml_priv, dev_stat, event);
2142 switch (fsm_getstate(fi)) {
2143 case DEV_STATE_STARTWAIT_RXTX:
2144 if (event == DEV_EVENT_RXUP)
2145 fsm_newstate(fi, DEV_STATE_STARTWAIT_TX);
2147 fsm_newstate(fi, DEV_STATE_STARTWAIT_RX);
2149 case DEV_STATE_STARTWAIT_RX:
2150 if (event == DEV_EVENT_RXUP) {
2151 fsm_newstate(fi, DEV_STATE_RUNNING);
2153 "Connected with remote side\n");
2154 ctcm_clear_busy(dev);
2157 case DEV_STATE_STARTWAIT_TX:
2158 if (event == DEV_EVENT_TXUP) {
2159 fsm_newstate(fi, DEV_STATE_RUNNING);
2161 "Connected with remote side\n");
2162 ctcm_clear_busy(dev);
2165 case DEV_STATE_STOPWAIT_TX:
2166 if (event == DEV_EVENT_RXUP)
2167 fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX);
2169 case DEV_STATE_STOPWAIT_RX:
2170 if (event == DEV_EVENT_TXUP)
2171 fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX);
2176 if (event == DEV_EVENT_RXUP)
2177 mpc_channel_action(priv->channel[CTCM_READ],
2178 CTCM_READ, MPC_CHANNEL_ADD);
2180 mpc_channel_action(priv->channel[CTCM_WRITE],
2181 CTCM_WRITE, MPC_CHANNEL_ADD);
2186 * Called from device statemachine
2187 * when a channel has been shutdown.
2189 * fi An instance of an interface statemachine.
2190 * event The event, just happened.
2191 * arg Generic pointer, casted from struct net_device * upon call.
2193 static void dev_action_chdown(fsm_instance *fi, int event, void *arg)
2196 struct net_device *dev = arg;
2197 struct ctcm_priv *priv = dev->ml_priv;
2199 CTCMY_DBF_DEV_NAME(SETUP, dev, "");
2201 switch (fsm_getstate(fi)) {
2202 case DEV_STATE_RUNNING:
2203 if (event == DEV_EVENT_TXDOWN)
2204 fsm_newstate(fi, DEV_STATE_STARTWAIT_TX);
2206 fsm_newstate(fi, DEV_STATE_STARTWAIT_RX);
2208 case DEV_STATE_STARTWAIT_RX:
2209 if (event == DEV_EVENT_TXDOWN)
2210 fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX);
2212 case DEV_STATE_STARTWAIT_TX:
2213 if (event == DEV_EVENT_RXDOWN)
2214 fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX);
2216 case DEV_STATE_STOPWAIT_RXTX:
2217 if (event == DEV_EVENT_TXDOWN)
2218 fsm_newstate(fi, DEV_STATE_STOPWAIT_RX);
2220 fsm_newstate(fi, DEV_STATE_STOPWAIT_TX);
2222 case DEV_STATE_STOPWAIT_RX:
2223 if (event == DEV_EVENT_RXDOWN)
2224 fsm_newstate(fi, DEV_STATE_STOPPED);
2226 case DEV_STATE_STOPWAIT_TX:
2227 if (event == DEV_EVENT_TXDOWN)
2228 fsm_newstate(fi, DEV_STATE_STOPPED);
2232 if (event == DEV_EVENT_RXDOWN)
2233 mpc_channel_action(priv->channel[CTCM_READ],
2234 CTCM_READ, MPC_CHANNEL_REMOVE);
2236 mpc_channel_action(priv->channel[CTCM_WRITE],
2237 CTCM_WRITE, MPC_CHANNEL_REMOVE);
2241 const fsm_node dev_fsm[] = {
2242 { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start },
2243 { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_START, dev_action_start },
2244 { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown },
2245 { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown },
2246 { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart },
2247 { DEV_STATE_STOPWAIT_RX, DEV_EVENT_START, dev_action_start },
2248 { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXUP, dev_action_chup },
2249 { DEV_STATE_STOPWAIT_RX, DEV_EVENT_TXUP, dev_action_chup },
2250 { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXDOWN, dev_action_chdown },
2251 { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RESTART, dev_action_restart },
2252 { DEV_STATE_STOPWAIT_TX, DEV_EVENT_START, dev_action_start },
2253 { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RXUP, dev_action_chup },
2254 { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXUP, dev_action_chup },
2255 { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXDOWN, dev_action_chdown },
2256 { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RESTART, dev_action_restart },
2257 { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_STOP, dev_action_stop },
2258 { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXUP, dev_action_chup },
2259 { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXUP, dev_action_chup },
2260 { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown },
2261 { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown },
2262 { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart },
2263 { DEV_STATE_STARTWAIT_TX, DEV_EVENT_STOP, dev_action_stop },
2264 { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXUP, dev_action_chup },
2265 { DEV_STATE_STARTWAIT_TX, DEV_EVENT_TXUP, dev_action_chup },
2266 { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXDOWN, dev_action_chdown },
2267 { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RESTART, dev_action_restart },
2268 { DEV_STATE_STARTWAIT_RX, DEV_EVENT_STOP, dev_action_stop },
2269 { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RXUP, dev_action_chup },
2270 { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXUP, dev_action_chup },
2271 { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXDOWN, dev_action_chdown },
2272 { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RESTART, dev_action_restart },
2273 { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop },
2274 { DEV_STATE_RUNNING, DEV_EVENT_RXDOWN, dev_action_chdown },
2275 { DEV_STATE_RUNNING, DEV_EVENT_TXDOWN, dev_action_chdown },
2276 { DEV_STATE_RUNNING, DEV_EVENT_TXUP, ctcm_action_nop },
2277 { DEV_STATE_RUNNING, DEV_EVENT_RXUP, ctcm_action_nop },
2278 { DEV_STATE_RUNNING, DEV_EVENT_RESTART, dev_action_restart },
2281 int dev_fsm_len = ARRAY_SIZE(dev_fsm);
2283 /* --- This is the END my friend --- */