]>
git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/s390/net/ctcm_fsms.c
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 memcpy(skb_put(ch
->trans_skb
, skb
->len
), 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 (skb
->protocol
== ntohs(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 memcpy(skb_put(new_skb
, block_len
),
1435 skb
->data
, block_len
);
1436 skb_queue_tail(&ch
->io_queue
, new_skb
);
1437 tasklet_schedule(&ch
->ch_tasklet
);
1440 memcpy(skb_put(new_skb
, len
), skb
->data
, len
);
1441 skb_queue_tail(&ch
->io_queue
, new_skb
);
1442 tasklet_hi_schedule(&ch
->ch_tasklet
);
1448 switch (fsm_getstate(grp
->fsm
)) {
1450 case MPCG_STATE_FLOWC
:
1451 case MPCG_STATE_READY
:
1452 if (ctcm_checkalloc_buffer(ch
))
1454 ch
->trans_skb
->data
= ch
->trans_skb_data
;
1455 skb_reset_tail_pointer(ch
->trans_skb
);
1456 ch
->trans_skb
->len
= 0;
1457 ch
->ccw
[1].count
= ch
->max_bufsize
;
1459 ctcmpc_dumpit((char *)&ch
->ccw
[0],
1460 sizeof(struct ccw1
) * 3);
1464 get_ccwdev_lock(ch
->cdev
), saveflags
);
1465 rc
= ccw_device_start(ch
->cdev
, &ch
->ccw
[0],
1466 (unsigned long)ch
, 0xff, 0);
1467 if (dolock
) /* see remark about conditional locking */
1468 spin_unlock_irqrestore(
1469 get_ccwdev_lock(ch
->cdev
), saveflags
);
1471 ctcm_ccw_check_rc(ch
, rc
, "normal RX");
1476 CTCM_PR_DEBUG("Exit %s: %s, ch=0x%p, id=%s\n",
1477 __func__
, dev
->name
, ch
, ch
->id
);
1482 * Initialize connection by sending a __u16 of value 0.
1484 * fi An instance of a channel statemachine.
1485 * event The event, just happened.
1486 * arg Generic pointer, casted from channel * upon call.
1488 static void ctcmpc_chx_firstio(fsm_instance
*fi
, int event
, void *arg
)
1490 struct channel
*ch
= arg
;
1491 struct net_device
*dev
= ch
->netdev
;
1492 struct ctcm_priv
*priv
= dev
->ml_priv
;
1493 struct mpc_group
*gptr
= priv
->mpcg
;
1495 CTCM_PR_DEBUG("Enter %s: id=%s, ch=0x%p\n",
1496 __func__
, ch
->id
, ch
);
1498 CTCM_DBF_TEXT_(MPC_TRACE
, CTC_DBF_INFO
,
1499 "%s: %s: chstate:%i, grpstate:%i, prot:%i\n",
1500 CTCM_FUNTAIL
, ch
->id
, fsm_getstate(fi
),
1501 fsm_getstate(gptr
->fsm
), ch
->protocol
);
1503 if (fsm_getstate(fi
) == CTC_STATE_TXIDLE
)
1504 MPC_DBF_DEV_NAME(TRACE
, dev
, "remote side issued READ? ");
1506 fsm_deltimer(&ch
->timer
);
1507 if (ctcm_checkalloc_buffer(ch
))
1510 switch (fsm_getstate(fi
)) {
1511 case CTC_STATE_STARTRETRY
:
1512 case CTC_STATE_SETUPWAIT
:
1513 if (CHANNEL_DIRECTION(ch
->flags
) == CTCM_READ
) {
1514 ctcmpc_chx_rxidle(fi
, event
, arg
);
1516 fsm_newstate(fi
, CTC_STATE_TXIDLE
);
1517 fsm_event(priv
->fsm
, DEV_EVENT_TXUP
, dev
);
1524 fsm_newstate(fi
, (CHANNEL_DIRECTION(ch
->flags
) == CTCM_READ
)
1525 ? CTC_STATE_RXINIT
: CTC_STATE_TXINIT
);
1528 CTCM_PR_DEBUG("Exit %s: id=%s, ch=0x%p\n",
1529 __func__
, ch
->id
, ch
);
1534 * Got initial data, check it. If OK,
1535 * notify device statemachine that we are up and
1538 * fi An instance of a channel statemachine.
1539 * event The event, just happened.
1540 * arg Generic pointer, casted from channel * upon call.
1542 void ctcmpc_chx_rxidle(fsm_instance
*fi
, int event
, void *arg
)
1544 struct channel
*ch
= arg
;
1545 struct net_device
*dev
= ch
->netdev
;
1546 struct ctcm_priv
*priv
= dev
->ml_priv
;
1547 struct mpc_group
*grp
= priv
->mpcg
;
1549 unsigned long saveflags
= 0; /* avoids compiler warning */
1551 fsm_deltimer(&ch
->timer
);
1552 CTCM_PR_DEBUG("%s: %s: %s: cp:%i, chstate:%i grpstate:%i\n",
1553 __func__
, ch
->id
, dev
->name
, smp_processor_id(),
1554 fsm_getstate(fi
), fsm_getstate(grp
->fsm
));
1556 fsm_newstate(fi
, CTC_STATE_RXIDLE
);
1557 /* XID processing complete */
1559 switch (fsm_getstate(grp
->fsm
)) {
1560 case MPCG_STATE_FLOWC
:
1561 case MPCG_STATE_READY
:
1562 if (ctcm_checkalloc_buffer(ch
))
1564 ch
->trans_skb
->data
= ch
->trans_skb_data
;
1565 skb_reset_tail_pointer(ch
->trans_skb
);
1566 ch
->trans_skb
->len
= 0;
1567 ch
->ccw
[1].count
= ch
->max_bufsize
;
1568 CTCM_CCW_DUMP((char *)&ch
->ccw
[0], sizeof(struct ccw1
) * 3);
1569 if (event
== CTC_EVENT_START
)
1570 /* see remark about conditional locking */
1571 spin_lock_irqsave(get_ccwdev_lock(ch
->cdev
), saveflags
);
1572 rc
= ccw_device_start(ch
->cdev
, &ch
->ccw
[0],
1573 (unsigned long)ch
, 0xff, 0);
1574 if (event
== CTC_EVENT_START
)
1575 spin_unlock_irqrestore(
1576 get_ccwdev_lock(ch
->cdev
), saveflags
);
1578 fsm_newstate(fi
, CTC_STATE_RXINIT
);
1579 ctcm_ccw_check_rc(ch
, rc
, "initial RX");
1587 fsm_event(priv
->fsm
, DEV_EVENT_RXUP
, dev
);
1593 * ctcmpc channel FSM action
1594 * called from several points in ctcmpc_ch_fsm
1597 static void ctcmpc_chx_attn(fsm_instance
*fsm
, int event
, void *arg
)
1599 struct channel
*ch
= arg
;
1600 struct net_device
*dev
= ch
->netdev
;
1601 struct ctcm_priv
*priv
= dev
->ml_priv
;
1602 struct mpc_group
*grp
= priv
->mpcg
;
1604 CTCM_PR_DEBUG("%s(%s): %s(ch=0x%p), cp=%i, ChStat:%s, GrpStat:%s\n",
1605 __func__
, dev
->name
, ch
->id
, ch
, smp_processor_id(),
1606 fsm_getstate_str(ch
->fsm
), fsm_getstate_str(grp
->fsm
));
1608 switch (fsm_getstate(grp
->fsm
)) {
1609 case MPCG_STATE_XID2INITW
:
1610 /* ok..start yside xid exchanges */
1611 if (!ch
->in_mpcgroup
)
1613 if (fsm_getstate(ch
->fsm
) == CH_XID0_PENDING
) {
1614 fsm_deltimer(&grp
->timer
);
1615 fsm_addtimer(&grp
->timer
,
1616 MPC_XID_TIMEOUT_VALUE
,
1617 MPCG_EVENT_TIMER
, dev
);
1618 fsm_event(grp
->fsm
, MPCG_EVENT_XID0DO
, ch
);
1620 } else if (fsm_getstate(ch
->fsm
) < CH_XID7_PENDING1
)
1621 /* attn rcvd before xid0 processed via bh */
1622 fsm_newstate(ch
->fsm
, CH_XID7_PENDING1
);
1624 case MPCG_STATE_XID2INITX
:
1625 case MPCG_STATE_XID0IOWAIT
:
1626 case MPCG_STATE_XID0IOWAIX
:
1627 /* attn rcvd before xid0 processed on ch
1628 but mid-xid0 processing for group */
1629 if (fsm_getstate(ch
->fsm
) < CH_XID7_PENDING1
)
1630 fsm_newstate(ch
->fsm
, CH_XID7_PENDING1
);
1632 case MPCG_STATE_XID7INITW
:
1633 case MPCG_STATE_XID7INITX
:
1634 case MPCG_STATE_XID7INITI
:
1635 case MPCG_STATE_XID7INITZ
:
1636 switch (fsm_getstate(ch
->fsm
)) {
1637 case CH_XID7_PENDING
:
1638 fsm_newstate(ch
->fsm
, CH_XID7_PENDING1
);
1640 case CH_XID7_PENDING2
:
1641 fsm_newstate(ch
->fsm
, CH_XID7_PENDING3
);
1644 fsm_event(grp
->fsm
, MPCG_EVENT_XID7DONE
, dev
);
1652 * ctcmpc channel FSM action
1653 * called from one point in ctcmpc_ch_fsm
1656 static void ctcmpc_chx_attnbusy(fsm_instance
*fsm
, int event
, void *arg
)
1658 struct channel
*ch
= arg
;
1659 struct net_device
*dev
= ch
->netdev
;
1660 struct ctcm_priv
*priv
= dev
->ml_priv
;
1661 struct mpc_group
*grp
= priv
->mpcg
;
1663 CTCM_PR_DEBUG("%s(%s): %s\n ChState:%s GrpState:%s\n",
1664 __func__
, dev
->name
, ch
->id
,
1665 fsm_getstate_str(ch
->fsm
), fsm_getstate_str(grp
->fsm
));
1667 fsm_deltimer(&ch
->timer
);
1669 switch (fsm_getstate(grp
->fsm
)) {
1670 case MPCG_STATE_XID0IOWAIT
:
1671 /* vtam wants to be primary.start yside xid exchanges*/
1672 /* only receive one attn-busy at a time so must not */
1673 /* change state each time */
1674 grp
->changed_side
= 1;
1675 fsm_newstate(grp
->fsm
, MPCG_STATE_XID2INITW
);
1677 case MPCG_STATE_XID2INITW
:
1678 if (grp
->changed_side
== 1) {
1679 grp
->changed_side
= 2;
1682 /* process began via call to establish_conn */
1683 /* so must report failure instead of reverting */
1684 /* back to ready-for-xid passive state */
1685 if (grp
->estconnfunc
)
1687 /* this attnbusy is NOT the result of xside xid */
1688 /* collisions so yside must have been triggered */
1689 /* by an ATTN that was not intended to start XID */
1690 /* processing. Revert back to ready-for-xid and */
1691 /* wait for ATTN interrupt to signal xid start */
1692 if (fsm_getstate(ch
->fsm
) == CH_XID0_INPROGRESS
) {
1693 fsm_newstate(ch
->fsm
, CH_XID0_PENDING
) ;
1694 fsm_deltimer(&grp
->timer
);
1697 fsm_event(grp
->fsm
, MPCG_EVENT_INOP
, dev
);
1699 case MPCG_STATE_XID2INITX
:
1700 /* XID2 was received before ATTN Busy for second
1701 channel.Send yside xid for second channel.
1703 if (grp
->changed_side
== 1) {
1704 grp
->changed_side
= 2;
1707 case MPCG_STATE_XID0IOWAIX
:
1708 case MPCG_STATE_XID7INITW
:
1709 case MPCG_STATE_XID7INITX
:
1710 case MPCG_STATE_XID7INITI
:
1711 case MPCG_STATE_XID7INITZ
:
1713 /* multiple attn-busy indicates too out-of-sync */
1714 /* and they are certainly not being received as part */
1715 /* of valid mpc group negotiations.. */
1716 fsm_event(grp
->fsm
, MPCG_EVENT_INOP
, dev
);
1720 if (grp
->changed_side
== 1) {
1721 fsm_deltimer(&grp
->timer
);
1722 fsm_addtimer(&grp
->timer
, MPC_XID_TIMEOUT_VALUE
,
1723 MPCG_EVENT_TIMER
, dev
);
1725 if (ch
->in_mpcgroup
)
1726 fsm_event(grp
->fsm
, MPCG_EVENT_XID0DO
, ch
);
1728 CTCM_DBF_TEXT_(MPC_ERROR
, CTC_DBF_ERROR
,
1729 "%s(%s): channel %s not added to group",
1730 CTCM_FUNTAIL
, dev
->name
, ch
->id
);
1737 * ctcmpc channel FSM action
1738 * called from several points in ctcmpc_ch_fsm
1741 static void ctcmpc_chx_resend(fsm_instance
*fsm
, int event
, void *arg
)
1743 struct channel
*ch
= arg
;
1744 struct net_device
*dev
= ch
->netdev
;
1745 struct ctcm_priv
*priv
= dev
->ml_priv
;
1746 struct mpc_group
*grp
= priv
->mpcg
;
1748 fsm_event(grp
->fsm
, MPCG_EVENT_XID0DO
, ch
);
1753 * ctcmpc channel FSM action
1754 * called from several points in ctcmpc_ch_fsm
1757 static void ctcmpc_chx_send_sweep(fsm_instance
*fsm
, int event
, void *arg
)
1759 struct channel
*ach
= arg
;
1760 struct net_device
*dev
= ach
->netdev
;
1761 struct ctcm_priv
*priv
= dev
->ml_priv
;
1762 struct mpc_group
*grp
= priv
->mpcg
;
1763 struct channel
*wch
= priv
->channel
[CTCM_WRITE
];
1764 struct channel
*rch
= priv
->channel
[CTCM_READ
];
1765 struct sk_buff
*skb
;
1766 struct th_sweep
*header
;
1768 unsigned long saveflags
= 0;
1770 CTCM_PR_DEBUG("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s\n",
1771 __func__
, smp_processor_id(), ach
, ach
->id
);
1773 if (grp
->in_sweep
== 0)
1776 CTCM_PR_DBGDATA("%s: 1: ToVTAM_th_seq= %08x\n" ,
1777 __func__
, wch
->th_seq_num
);
1778 CTCM_PR_DBGDATA("%s: 1: FromVTAM_th_seq= %08x\n" ,
1779 __func__
, rch
->th_seq_num
);
1781 if (fsm_getstate(wch
->fsm
) != CTC_STATE_TXIDLE
) {
1782 /* give the previous IO time to complete */
1783 fsm_addtimer(&wch
->sweep_timer
,
1784 200, CTC_EVENT_RSWEEP_TIMER
, wch
);
1788 skb
= skb_dequeue(&wch
->sweep_queue
);
1792 if (set_normalized_cda(&wch
->ccw
[4], skb
->data
)) {
1794 ctcm_clear_busy_do(dev
);
1795 dev_kfree_skb_any(skb
);
1796 fsm_event(grp
->fsm
, MPCG_EVENT_INOP
, dev
);
1799 atomic_inc(&skb
->users
);
1800 skb_queue_tail(&wch
->io_queue
, skb
);
1803 /* send out the sweep */
1804 wch
->ccw
[4].count
= skb
->len
;
1806 header
= (struct th_sweep
*)skb
->data
;
1807 switch (header
->th
.th_ch_flag
) {
1809 grp
->sweep_req_pend_num
--;
1812 grp
->sweep_rsp_pend_num
--;
1816 header
->sw
.th_last_seq
= wch
->th_seq_num
;
1818 CTCM_CCW_DUMP((char *)&wch
->ccw
[3], sizeof(struct ccw1
) * 3);
1819 CTCM_PR_DBGDATA("%s: sweep packet\n", __func__
);
1820 CTCM_D3_DUMP((char *)header
, TH_SWEEP_LENGTH
);
1822 fsm_addtimer(&wch
->timer
, CTCM_TIME_5_SEC
, CTC_EVENT_TIMER
, wch
);
1823 fsm_newstate(wch
->fsm
, CTC_STATE_TX
);
1825 spin_lock_irqsave(get_ccwdev_lock(wch
->cdev
), saveflags
);
1826 wch
->prof
.send_stamp
= jiffies
;
1827 rc
= ccw_device_start(wch
->cdev
, &wch
->ccw
[3],
1828 (unsigned long) wch
, 0xff, 0);
1829 spin_unlock_irqrestore(get_ccwdev_lock(wch
->cdev
), saveflags
);
1831 if ((grp
->sweep_req_pend_num
== 0) &&
1832 (grp
->sweep_rsp_pend_num
== 0)) {
1834 rch
->th_seq_num
= 0x00;
1835 wch
->th_seq_num
= 0x00;
1836 ctcm_clear_busy_do(dev
);
1839 CTCM_PR_DBGDATA("%s: To-/From-VTAM_th_seq = %08x/%08x\n" ,
1840 __func__
, wch
->th_seq_num
, rch
->th_seq_num
);
1843 ctcm_ccw_check_rc(wch
, rc
, "send sweep");
1851 * The ctcmpc statemachine for a channel.
1854 const fsm_node ctcmpc_ch_fsm
[] = {
1855 { CTC_STATE_STOPPED
, CTC_EVENT_STOP
, ctcm_action_nop
},
1856 { CTC_STATE_STOPPED
, CTC_EVENT_START
, ctcm_chx_start
},
1857 { CTC_STATE_STOPPED
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
1858 { CTC_STATE_STOPPED
, CTC_EVENT_FINSTAT
, ctcm_action_nop
},
1859 { CTC_STATE_STOPPED
, CTC_EVENT_MC_FAIL
, ctcm_action_nop
},
1861 { CTC_STATE_NOTOP
, CTC_EVENT_STOP
, ctcm_chx_stop
},
1862 { CTC_STATE_NOTOP
, CTC_EVENT_START
, ctcm_action_nop
},
1863 { CTC_STATE_NOTOP
, CTC_EVENT_FINSTAT
, ctcm_action_nop
},
1864 { CTC_STATE_NOTOP
, CTC_EVENT_MC_FAIL
, ctcm_action_nop
},
1865 { CTC_STATE_NOTOP
, CTC_EVENT_MC_GOOD
, ctcm_chx_start
},
1866 { CTC_STATE_NOTOP
, CTC_EVENT_UC_RCRESET
, ctcm_chx_stop
},
1867 { CTC_STATE_NOTOP
, CTC_EVENT_UC_RSRESET
, ctcm_chx_stop
},
1868 { CTC_STATE_NOTOP
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
1870 { CTC_STATE_STARTWAIT
, CTC_EVENT_STOP
, ctcm_chx_haltio
},
1871 { CTC_STATE_STARTWAIT
, CTC_EVENT_START
, ctcm_action_nop
},
1872 { CTC_STATE_STARTWAIT
, CTC_EVENT_FINSTAT
, ctcm_chx_setmode
},
1873 { CTC_STATE_STARTWAIT
, CTC_EVENT_TIMER
, ctcm_chx_setuperr
},
1874 { CTC_STATE_STARTWAIT
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
1875 { CTC_STATE_STARTWAIT
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
1877 { CTC_STATE_STARTRETRY
, CTC_EVENT_STOP
, ctcm_chx_haltio
},
1878 { CTC_STATE_STARTRETRY
, CTC_EVENT_TIMER
, ctcm_chx_setmode
},
1879 { CTC_STATE_STARTRETRY
, CTC_EVENT_FINSTAT
, ctcm_chx_setmode
},
1880 { CTC_STATE_STARTRETRY
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
1881 { CTC_STATE_STARTRETRY
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
1883 { CTC_STATE_SETUPWAIT
, CTC_EVENT_STOP
, ctcm_chx_haltio
},
1884 { CTC_STATE_SETUPWAIT
, CTC_EVENT_START
, ctcm_action_nop
},
1885 { CTC_STATE_SETUPWAIT
, CTC_EVENT_FINSTAT
, ctcmpc_chx_firstio
},
1886 { CTC_STATE_SETUPWAIT
, CTC_EVENT_UC_RCRESET
, ctcm_chx_setuperr
},
1887 { CTC_STATE_SETUPWAIT
, CTC_EVENT_UC_RSRESET
, ctcm_chx_setuperr
},
1888 { CTC_STATE_SETUPWAIT
, CTC_EVENT_TIMER
, ctcm_chx_setmode
},
1889 { CTC_STATE_SETUPWAIT
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
1890 { CTC_STATE_SETUPWAIT
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
1892 { CTC_STATE_RXINIT
, CTC_EVENT_STOP
, ctcm_chx_haltio
},
1893 { CTC_STATE_RXINIT
, CTC_EVENT_START
, ctcm_action_nop
},
1894 { CTC_STATE_RXINIT
, CTC_EVENT_FINSTAT
, ctcmpc_chx_rxidle
},
1895 { CTC_STATE_RXINIT
, CTC_EVENT_UC_RCRESET
, ctcm_chx_rxiniterr
},
1896 { CTC_STATE_RXINIT
, CTC_EVENT_UC_RSRESET
, ctcm_chx_rxiniterr
},
1897 { CTC_STATE_RXINIT
, CTC_EVENT_TIMER
, ctcm_chx_rxiniterr
},
1898 { CTC_STATE_RXINIT
, CTC_EVENT_ATTNBUSY
, ctcm_chx_rxinitfail
},
1899 { CTC_STATE_RXINIT
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
1900 { CTC_STATE_RXINIT
, CTC_EVENT_UC_ZERO
, ctcmpc_chx_firstio
},
1901 { CTC_STATE_RXINIT
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
1903 { CH_XID0_PENDING
, CTC_EVENT_FINSTAT
, ctcm_action_nop
},
1904 { CH_XID0_PENDING
, CTC_EVENT_ATTN
, ctcmpc_chx_attn
},
1905 { CH_XID0_PENDING
, CTC_EVENT_STOP
, ctcm_chx_haltio
},
1906 { CH_XID0_PENDING
, CTC_EVENT_START
, ctcm_action_nop
},
1907 { CH_XID0_PENDING
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
1908 { CH_XID0_PENDING
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
1909 { CH_XID0_PENDING
, CTC_EVENT_UC_RCRESET
, ctcm_chx_setuperr
},
1910 { CH_XID0_PENDING
, CTC_EVENT_UC_RSRESET
, ctcm_chx_setuperr
},
1911 { CH_XID0_PENDING
, CTC_EVENT_UC_RSRESET
, ctcm_chx_setuperr
},
1912 { CH_XID0_PENDING
, CTC_EVENT_ATTNBUSY
, ctcm_chx_iofatal
},
1914 { CH_XID0_INPROGRESS
, CTC_EVENT_FINSTAT
, ctcmpc_chx_rx
},
1915 { CH_XID0_INPROGRESS
, CTC_EVENT_ATTN
, ctcmpc_chx_attn
},
1916 { CH_XID0_INPROGRESS
, CTC_EVENT_STOP
, ctcm_chx_haltio
},
1917 { CH_XID0_INPROGRESS
, CTC_EVENT_START
, ctcm_action_nop
},
1918 { CH_XID0_INPROGRESS
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
1919 { CH_XID0_INPROGRESS
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
1920 { CH_XID0_INPROGRESS
, CTC_EVENT_UC_ZERO
, ctcmpc_chx_rx
},
1921 { CH_XID0_INPROGRESS
, CTC_EVENT_UC_RCRESET
, ctcm_chx_setuperr
},
1922 { CH_XID0_INPROGRESS
, CTC_EVENT_ATTNBUSY
, ctcmpc_chx_attnbusy
},
1923 { CH_XID0_INPROGRESS
, CTC_EVENT_TIMER
, ctcmpc_chx_resend
},
1924 { CH_XID0_INPROGRESS
, CTC_EVENT_IO_EBUSY
, ctcm_chx_fail
},
1926 { CH_XID7_PENDING
, CTC_EVENT_FINSTAT
, ctcmpc_chx_rx
},
1927 { CH_XID7_PENDING
, CTC_EVENT_ATTN
, ctcmpc_chx_attn
},
1928 { CH_XID7_PENDING
, CTC_EVENT_STOP
, ctcm_chx_haltio
},
1929 { CH_XID7_PENDING
, CTC_EVENT_START
, ctcm_action_nop
},
1930 { CH_XID7_PENDING
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
1931 { CH_XID7_PENDING
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
1932 { CH_XID7_PENDING
, CTC_EVENT_UC_ZERO
, ctcmpc_chx_rx
},
1933 { CH_XID7_PENDING
, CTC_EVENT_UC_RCRESET
, ctcm_chx_setuperr
},
1934 { CH_XID7_PENDING
, CTC_EVENT_UC_RSRESET
, ctcm_chx_setuperr
},
1935 { CH_XID7_PENDING
, CTC_EVENT_UC_RSRESET
, ctcm_chx_setuperr
},
1936 { CH_XID7_PENDING
, CTC_EVENT_ATTNBUSY
, ctcm_chx_iofatal
},
1937 { CH_XID7_PENDING
, CTC_EVENT_TIMER
, ctcmpc_chx_resend
},
1938 { CH_XID7_PENDING
, CTC_EVENT_IO_EBUSY
, ctcm_chx_fail
},
1940 { CH_XID7_PENDING1
, CTC_EVENT_FINSTAT
, ctcmpc_chx_rx
},
1941 { CH_XID7_PENDING1
, CTC_EVENT_ATTN
, ctcmpc_chx_attn
},
1942 { CH_XID7_PENDING1
, CTC_EVENT_STOP
, ctcm_chx_haltio
},
1943 { CH_XID7_PENDING1
, CTC_EVENT_START
, ctcm_action_nop
},
1944 { CH_XID7_PENDING1
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
1945 { CH_XID7_PENDING1
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
1946 { CH_XID7_PENDING1
, CTC_EVENT_UC_ZERO
, ctcmpc_chx_rx
},
1947 { CH_XID7_PENDING1
, CTC_EVENT_UC_RCRESET
, ctcm_chx_setuperr
},
1948 { CH_XID7_PENDING1
, CTC_EVENT_UC_RSRESET
, ctcm_chx_setuperr
},
1949 { CH_XID7_PENDING1
, CTC_EVENT_ATTNBUSY
, ctcm_chx_iofatal
},
1950 { CH_XID7_PENDING1
, CTC_EVENT_TIMER
, ctcmpc_chx_resend
},
1951 { CH_XID7_PENDING1
, CTC_EVENT_IO_EBUSY
, ctcm_chx_fail
},
1953 { CH_XID7_PENDING2
, CTC_EVENT_FINSTAT
, ctcmpc_chx_rx
},
1954 { CH_XID7_PENDING2
, CTC_EVENT_ATTN
, ctcmpc_chx_attn
},
1955 { CH_XID7_PENDING2
, CTC_EVENT_STOP
, ctcm_chx_haltio
},
1956 { CH_XID7_PENDING2
, CTC_EVENT_START
, ctcm_action_nop
},
1957 { CH_XID7_PENDING2
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
1958 { CH_XID7_PENDING2
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
1959 { CH_XID7_PENDING2
, CTC_EVENT_UC_ZERO
, ctcmpc_chx_rx
},
1960 { CH_XID7_PENDING2
, CTC_EVENT_UC_RCRESET
, ctcm_chx_setuperr
},
1961 { CH_XID7_PENDING2
, CTC_EVENT_UC_RSRESET
, ctcm_chx_setuperr
},
1962 { CH_XID7_PENDING2
, CTC_EVENT_ATTNBUSY
, ctcm_chx_iofatal
},
1963 { CH_XID7_PENDING2
, CTC_EVENT_TIMER
, ctcmpc_chx_resend
},
1964 { CH_XID7_PENDING2
, CTC_EVENT_IO_EBUSY
, ctcm_chx_fail
},
1966 { CH_XID7_PENDING3
, CTC_EVENT_FINSTAT
, ctcmpc_chx_rx
},
1967 { CH_XID7_PENDING3
, CTC_EVENT_ATTN
, ctcmpc_chx_attn
},
1968 { CH_XID7_PENDING3
, CTC_EVENT_STOP
, ctcm_chx_haltio
},
1969 { CH_XID7_PENDING3
, CTC_EVENT_START
, ctcm_action_nop
},
1970 { CH_XID7_PENDING3
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
1971 { CH_XID7_PENDING3
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
1972 { CH_XID7_PENDING3
, CTC_EVENT_UC_ZERO
, ctcmpc_chx_rx
},
1973 { CH_XID7_PENDING3
, CTC_EVENT_UC_RCRESET
, ctcm_chx_setuperr
},
1974 { CH_XID7_PENDING3
, CTC_EVENT_UC_RSRESET
, ctcm_chx_setuperr
},
1975 { CH_XID7_PENDING3
, CTC_EVENT_ATTNBUSY
, ctcm_chx_iofatal
},
1976 { CH_XID7_PENDING3
, CTC_EVENT_TIMER
, ctcmpc_chx_resend
},
1977 { CH_XID7_PENDING3
, CTC_EVENT_IO_EBUSY
, ctcm_chx_fail
},
1979 { CH_XID7_PENDING4
, CTC_EVENT_FINSTAT
, ctcmpc_chx_rx
},
1980 { CH_XID7_PENDING4
, CTC_EVENT_ATTN
, ctcmpc_chx_attn
},
1981 { CH_XID7_PENDING4
, CTC_EVENT_STOP
, ctcm_chx_haltio
},
1982 { CH_XID7_PENDING4
, CTC_EVENT_START
, ctcm_action_nop
},
1983 { CH_XID7_PENDING4
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
1984 { CH_XID7_PENDING4
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
1985 { CH_XID7_PENDING4
, CTC_EVENT_UC_ZERO
, ctcmpc_chx_rx
},
1986 { CH_XID7_PENDING4
, CTC_EVENT_UC_RCRESET
, ctcm_chx_setuperr
},
1987 { CH_XID7_PENDING4
, CTC_EVENT_UC_RSRESET
, ctcm_chx_setuperr
},
1988 { CH_XID7_PENDING4
, CTC_EVENT_ATTNBUSY
, ctcm_chx_iofatal
},
1989 { CH_XID7_PENDING4
, CTC_EVENT_TIMER
, ctcmpc_chx_resend
},
1990 { CH_XID7_PENDING4
, CTC_EVENT_IO_EBUSY
, ctcm_chx_fail
},
1992 { CTC_STATE_RXIDLE
, CTC_EVENT_STOP
, ctcm_chx_haltio
},
1993 { CTC_STATE_RXIDLE
, CTC_EVENT_START
, ctcm_action_nop
},
1994 { CTC_STATE_RXIDLE
, CTC_EVENT_FINSTAT
, ctcmpc_chx_rx
},
1995 { CTC_STATE_RXIDLE
, CTC_EVENT_UC_RCRESET
, ctcm_chx_rxdisc
},
1996 { CTC_STATE_RXIDLE
, CTC_EVENT_UC_RSRESET
, ctcm_chx_fail
},
1997 { CTC_STATE_RXIDLE
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
1998 { CTC_STATE_RXIDLE
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
1999 { CTC_STATE_RXIDLE
, CTC_EVENT_UC_ZERO
, ctcmpc_chx_rx
},
2001 { CTC_STATE_TXINIT
, CTC_EVENT_STOP
, ctcm_chx_haltio
},
2002 { CTC_STATE_TXINIT
, CTC_EVENT_START
, ctcm_action_nop
},
2003 { CTC_STATE_TXINIT
, CTC_EVENT_FINSTAT
, ctcm_chx_txidle
},
2004 { CTC_STATE_TXINIT
, CTC_EVENT_UC_RCRESET
, ctcm_chx_txiniterr
},
2005 { CTC_STATE_TXINIT
, CTC_EVENT_UC_RSRESET
, ctcm_chx_txiniterr
},
2006 { CTC_STATE_TXINIT
, CTC_EVENT_TIMER
, ctcm_chx_txiniterr
},
2007 { CTC_STATE_TXINIT
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
2008 { CTC_STATE_TXINIT
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
2009 { CTC_STATE_TXINIT
, CTC_EVENT_RSWEEP_TIMER
, ctcmpc_chx_send_sweep
},
2011 { CTC_STATE_TXIDLE
, CTC_EVENT_STOP
, ctcm_chx_haltio
},
2012 { CTC_STATE_TXIDLE
, CTC_EVENT_START
, ctcm_action_nop
},
2013 { CTC_STATE_TXIDLE
, CTC_EVENT_FINSTAT
, ctcmpc_chx_firstio
},
2014 { CTC_STATE_TXIDLE
, CTC_EVENT_UC_RCRESET
, ctcm_chx_fail
},
2015 { CTC_STATE_TXIDLE
, CTC_EVENT_UC_RSRESET
, ctcm_chx_fail
},
2016 { CTC_STATE_TXIDLE
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
2017 { CTC_STATE_TXIDLE
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
2018 { CTC_STATE_TXIDLE
, CTC_EVENT_RSWEEP_TIMER
, ctcmpc_chx_send_sweep
},
2020 { CTC_STATE_TERM
, CTC_EVENT_STOP
, ctcm_action_nop
},
2021 { CTC_STATE_TERM
, CTC_EVENT_START
, ctcm_chx_restart
},
2022 { CTC_STATE_TERM
, CTC_EVENT_FINSTAT
, ctcm_chx_stopped
},
2023 { CTC_STATE_TERM
, CTC_EVENT_UC_RCRESET
, ctcm_action_nop
},
2024 { CTC_STATE_TERM
, CTC_EVENT_UC_RSRESET
, ctcm_action_nop
},
2025 { CTC_STATE_TERM
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
2026 { CTC_STATE_TERM
, CTC_EVENT_IO_EBUSY
, ctcm_chx_fail
},
2027 { CTC_STATE_TERM
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
2029 { CTC_STATE_DTERM
, CTC_EVENT_STOP
, ctcm_chx_haltio
},
2030 { CTC_STATE_DTERM
, CTC_EVENT_START
, ctcm_chx_restart
},
2031 { CTC_STATE_DTERM
, CTC_EVENT_FINSTAT
, ctcm_chx_setmode
},
2032 { CTC_STATE_DTERM
, CTC_EVENT_UC_RCRESET
, ctcm_action_nop
},
2033 { CTC_STATE_DTERM
, CTC_EVENT_UC_RSRESET
, ctcm_action_nop
},
2034 { CTC_STATE_DTERM
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
2035 { CTC_STATE_DTERM
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
2037 { CTC_STATE_TX
, CTC_EVENT_STOP
, ctcm_chx_haltio
},
2038 { CTC_STATE_TX
, CTC_EVENT_START
, ctcm_action_nop
},
2039 { CTC_STATE_TX
, CTC_EVENT_FINSTAT
, ctcmpc_chx_txdone
},
2040 { CTC_STATE_TX
, CTC_EVENT_UC_RCRESET
, ctcm_chx_fail
},
2041 { CTC_STATE_TX
, CTC_EVENT_UC_RSRESET
, ctcm_chx_fail
},
2042 { CTC_STATE_TX
, CTC_EVENT_TIMER
, ctcm_chx_txretry
},
2043 { CTC_STATE_TX
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
2044 { CTC_STATE_TX
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
2045 { CTC_STATE_TX
, CTC_EVENT_RSWEEP_TIMER
, ctcmpc_chx_send_sweep
},
2046 { CTC_STATE_TX
, CTC_EVENT_IO_EBUSY
, ctcm_chx_fail
},
2048 { CTC_STATE_RXERR
, CTC_EVENT_STOP
, ctcm_chx_haltio
},
2049 { CTC_STATE_TXERR
, CTC_EVENT_STOP
, ctcm_chx_haltio
},
2050 { CTC_STATE_TXERR
, CTC_EVENT_IO_ENODEV
, ctcm_chx_iofatal
},
2051 { CTC_STATE_TXERR
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
2052 { CTC_STATE_RXERR
, CTC_EVENT_MC_FAIL
, ctcm_chx_fail
},
2055 int mpc_ch_fsm_len
= ARRAY_SIZE(ctcmpc_ch_fsm
);
2058 * Actions for interface - statemachine.
2062 * Startup channels by sending CTC_EVENT_START to each channel.
2064 * fi An instance of an interface statemachine.
2065 * event The event, just happened.
2066 * arg Generic pointer, casted from struct net_device * upon call.
2068 static void dev_action_start(fsm_instance
*fi
, int event
, void *arg
)
2070 struct net_device
*dev
= arg
;
2071 struct ctcm_priv
*priv
= dev
->ml_priv
;
2074 CTCMY_DBF_DEV_NAME(SETUP
, dev
, "");
2076 fsm_deltimer(&priv
->restart_timer
);
2077 fsm_newstate(fi
, DEV_STATE_STARTWAIT_RXTX
);
2079 priv
->mpcg
->channels_terminating
= 0;
2080 for (direction
= CTCM_READ
; direction
<= CTCM_WRITE
; direction
++) {
2081 struct channel
*ch
= priv
->channel
[direction
];
2082 fsm_event(ch
->fsm
, CTC_EVENT_START
, ch
);
2087 * Shutdown channels by sending CTC_EVENT_STOP to each channel.
2089 * fi An instance of an interface statemachine.
2090 * event The event, just happened.
2091 * arg Generic pointer, casted from struct net_device * upon call.
2093 static void dev_action_stop(fsm_instance
*fi
, int event
, void *arg
)
2096 struct net_device
*dev
= arg
;
2097 struct ctcm_priv
*priv
= dev
->ml_priv
;
2099 CTCMY_DBF_DEV_NAME(SETUP
, dev
, "");
2101 fsm_newstate(fi
, DEV_STATE_STOPWAIT_RXTX
);
2102 for (direction
= CTCM_READ
; direction
<= CTCM_WRITE
; direction
++) {
2103 struct channel
*ch
= priv
->channel
[direction
];
2104 fsm_event(ch
->fsm
, CTC_EVENT_STOP
, ch
);
2105 ch
->th_seq_num
= 0x00;
2106 CTCM_PR_DEBUG("%s: CH_th_seq= %08x\n",
2107 __func__
, ch
->th_seq_num
);
2110 fsm_newstate(priv
->mpcg
->fsm
, MPCG_STATE_RESET
);
2113 static void dev_action_restart(fsm_instance
*fi
, int event
, void *arg
)
2116 struct net_device
*dev
= arg
;
2117 struct ctcm_priv
*priv
= dev
->ml_priv
;
2119 CTCMY_DBF_DEV_NAME(TRACE
, dev
, "");
2122 restart_timer
= CTCM_TIME_1_SEC
;
2124 restart_timer
= CTCM_TIME_5_SEC
;
2126 dev_info(&dev
->dev
, "Restarting device\n");
2128 dev_action_stop(fi
, event
, arg
);
2129 fsm_event(priv
->fsm
, DEV_EVENT_STOP
, dev
);
2131 fsm_newstate(priv
->mpcg
->fsm
, MPCG_STATE_RESET
);
2133 /* going back into start sequence too quickly can */
2134 /* result in the other side becoming unreachable due */
2135 /* to sense reported when IO is aborted */
2136 fsm_addtimer(&priv
->restart_timer
, restart_timer
,
2137 DEV_EVENT_START
, dev
);
2141 * Called from channel statemachine
2142 * when a channel is up and running.
2144 * fi An instance of an interface statemachine.
2145 * event The event, just happened.
2146 * arg Generic pointer, casted from struct net_device * upon call.
2148 static void dev_action_chup(fsm_instance
*fi
, int event
, void *arg
)
2150 struct net_device
*dev
= arg
;
2151 struct ctcm_priv
*priv
= dev
->ml_priv
;
2152 int dev_stat
= fsm_getstate(fi
);
2154 CTCM_DBF_TEXT_(SETUP
, CTC_DBF_NOTICE
,
2155 "%s(%s): priv = %p [%d,%d]\n ", CTCM_FUNTAIL
,
2156 dev
->name
, dev
->ml_priv
, dev_stat
, event
);
2158 switch (fsm_getstate(fi
)) {
2159 case DEV_STATE_STARTWAIT_RXTX
:
2160 if (event
== DEV_EVENT_RXUP
)
2161 fsm_newstate(fi
, DEV_STATE_STARTWAIT_TX
);
2163 fsm_newstate(fi
, DEV_STATE_STARTWAIT_RX
);
2165 case DEV_STATE_STARTWAIT_RX
:
2166 if (event
== DEV_EVENT_RXUP
) {
2167 fsm_newstate(fi
, DEV_STATE_RUNNING
);
2169 "Connected with remote side\n");
2170 ctcm_clear_busy(dev
);
2173 case DEV_STATE_STARTWAIT_TX
:
2174 if (event
== DEV_EVENT_TXUP
) {
2175 fsm_newstate(fi
, DEV_STATE_RUNNING
);
2177 "Connected with remote side\n");
2178 ctcm_clear_busy(dev
);
2181 case DEV_STATE_STOPWAIT_TX
:
2182 if (event
== DEV_EVENT_RXUP
)
2183 fsm_newstate(fi
, DEV_STATE_STOPWAIT_RXTX
);
2185 case DEV_STATE_STOPWAIT_RX
:
2186 if (event
== DEV_EVENT_TXUP
)
2187 fsm_newstate(fi
, DEV_STATE_STOPWAIT_RXTX
);
2192 if (event
== DEV_EVENT_RXUP
)
2193 mpc_channel_action(priv
->channel
[CTCM_READ
],
2194 CTCM_READ
, MPC_CHANNEL_ADD
);
2196 mpc_channel_action(priv
->channel
[CTCM_WRITE
],
2197 CTCM_WRITE
, MPC_CHANNEL_ADD
);
2202 * Called from device statemachine
2203 * when a channel has been shutdown.
2205 * fi An instance of an interface statemachine.
2206 * event The event, just happened.
2207 * arg Generic pointer, casted from struct net_device * upon call.
2209 static void dev_action_chdown(fsm_instance
*fi
, int event
, void *arg
)
2212 struct net_device
*dev
= arg
;
2213 struct ctcm_priv
*priv
= dev
->ml_priv
;
2215 CTCMY_DBF_DEV_NAME(SETUP
, dev
, "");
2217 switch (fsm_getstate(fi
)) {
2218 case DEV_STATE_RUNNING
:
2219 if (event
== DEV_EVENT_TXDOWN
)
2220 fsm_newstate(fi
, DEV_STATE_STARTWAIT_TX
);
2222 fsm_newstate(fi
, DEV_STATE_STARTWAIT_RX
);
2224 case DEV_STATE_STARTWAIT_RX
:
2225 if (event
== DEV_EVENT_TXDOWN
)
2226 fsm_newstate(fi
, DEV_STATE_STARTWAIT_RXTX
);
2228 case DEV_STATE_STARTWAIT_TX
:
2229 if (event
== DEV_EVENT_RXDOWN
)
2230 fsm_newstate(fi
, DEV_STATE_STARTWAIT_RXTX
);
2232 case DEV_STATE_STOPWAIT_RXTX
:
2233 if (event
== DEV_EVENT_TXDOWN
)
2234 fsm_newstate(fi
, DEV_STATE_STOPWAIT_RX
);
2236 fsm_newstate(fi
, DEV_STATE_STOPWAIT_TX
);
2238 case DEV_STATE_STOPWAIT_RX
:
2239 if (event
== DEV_EVENT_RXDOWN
)
2240 fsm_newstate(fi
, DEV_STATE_STOPPED
);
2242 case DEV_STATE_STOPWAIT_TX
:
2243 if (event
== DEV_EVENT_TXDOWN
)
2244 fsm_newstate(fi
, DEV_STATE_STOPPED
);
2248 if (event
== DEV_EVENT_RXDOWN
)
2249 mpc_channel_action(priv
->channel
[CTCM_READ
],
2250 CTCM_READ
, MPC_CHANNEL_REMOVE
);
2252 mpc_channel_action(priv
->channel
[CTCM_WRITE
],
2253 CTCM_WRITE
, MPC_CHANNEL_REMOVE
);
2257 const fsm_node dev_fsm
[] = {
2258 { DEV_STATE_STOPPED
, DEV_EVENT_START
, dev_action_start
},
2259 { DEV_STATE_STOPWAIT_RXTX
, DEV_EVENT_START
, dev_action_start
},
2260 { DEV_STATE_STOPWAIT_RXTX
, DEV_EVENT_RXDOWN
, dev_action_chdown
},
2261 { DEV_STATE_STOPWAIT_RXTX
, DEV_EVENT_TXDOWN
, dev_action_chdown
},
2262 { DEV_STATE_STOPWAIT_RXTX
, DEV_EVENT_RESTART
, dev_action_restart
},
2263 { DEV_STATE_STOPWAIT_RX
, DEV_EVENT_START
, dev_action_start
},
2264 { DEV_STATE_STOPWAIT_RX
, DEV_EVENT_RXUP
, dev_action_chup
},
2265 { DEV_STATE_STOPWAIT_RX
, DEV_EVENT_TXUP
, dev_action_chup
},
2266 { DEV_STATE_STOPWAIT_RX
, DEV_EVENT_RXDOWN
, dev_action_chdown
},
2267 { DEV_STATE_STOPWAIT_RX
, DEV_EVENT_RESTART
, dev_action_restart
},
2268 { DEV_STATE_STOPWAIT_TX
, DEV_EVENT_START
, dev_action_start
},
2269 { DEV_STATE_STOPWAIT_TX
, DEV_EVENT_RXUP
, dev_action_chup
},
2270 { DEV_STATE_STOPWAIT_TX
, DEV_EVENT_TXUP
, dev_action_chup
},
2271 { DEV_STATE_STOPWAIT_TX
, DEV_EVENT_TXDOWN
, dev_action_chdown
},
2272 { DEV_STATE_STOPWAIT_TX
, DEV_EVENT_RESTART
, dev_action_restart
},
2273 { DEV_STATE_STARTWAIT_RXTX
, DEV_EVENT_STOP
, dev_action_stop
},
2274 { DEV_STATE_STARTWAIT_RXTX
, DEV_EVENT_RXUP
, dev_action_chup
},
2275 { DEV_STATE_STARTWAIT_RXTX
, DEV_EVENT_TXUP
, dev_action_chup
},
2276 { DEV_STATE_STARTWAIT_RXTX
, DEV_EVENT_RXDOWN
, dev_action_chdown
},
2277 { DEV_STATE_STARTWAIT_RXTX
, DEV_EVENT_TXDOWN
, dev_action_chdown
},
2278 { DEV_STATE_STARTWAIT_RXTX
, DEV_EVENT_RESTART
, dev_action_restart
},
2279 { DEV_STATE_STARTWAIT_TX
, DEV_EVENT_STOP
, dev_action_stop
},
2280 { DEV_STATE_STARTWAIT_TX
, DEV_EVENT_RXUP
, dev_action_chup
},
2281 { DEV_STATE_STARTWAIT_TX
, DEV_EVENT_TXUP
, dev_action_chup
},
2282 { DEV_STATE_STARTWAIT_TX
, DEV_EVENT_RXDOWN
, dev_action_chdown
},
2283 { DEV_STATE_STARTWAIT_TX
, DEV_EVENT_RESTART
, dev_action_restart
},
2284 { DEV_STATE_STARTWAIT_RX
, DEV_EVENT_STOP
, dev_action_stop
},
2285 { DEV_STATE_STARTWAIT_RX
, DEV_EVENT_RXUP
, dev_action_chup
},
2286 { DEV_STATE_STARTWAIT_RX
, DEV_EVENT_TXUP
, dev_action_chup
},
2287 { DEV_STATE_STARTWAIT_RX
, DEV_EVENT_TXDOWN
, dev_action_chdown
},
2288 { DEV_STATE_STARTWAIT_RX
, DEV_EVENT_RESTART
, dev_action_restart
},
2289 { DEV_STATE_RUNNING
, DEV_EVENT_STOP
, dev_action_stop
},
2290 { DEV_STATE_RUNNING
, DEV_EVENT_RXDOWN
, dev_action_chdown
},
2291 { DEV_STATE_RUNNING
, DEV_EVENT_TXDOWN
, dev_action_chdown
},
2292 { DEV_STATE_RUNNING
, DEV_EVENT_TXUP
, ctcm_action_nop
},
2293 { DEV_STATE_RUNNING
, DEV_EVENT_RXUP
, ctcm_action_nop
},
2294 { DEV_STATE_RUNNING
, DEV_EVENT_RESTART
, dev_action_restart
},
2297 int dev_fsm_len
= ARRAY_SIZE(dev_fsm
);
2299 /* --- This is the END my friend --- */