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293d984f PT |
1 | /* |
2 | * drivers/s390/net/ctcm_fsms.c | |
3 | * | |
4 | * Copyright IBM Corp. 2001, 2007 | |
5 | * Authors: Fritz Elfert (felfert@millenux.com) | |
6 | * Peter Tiedemann (ptiedem@de.ibm.com) | |
7 | * MPC additions : | |
8 | * Belinda Thompson (belindat@us.ibm.com) | |
9 | * Andy Richter (richtera@us.ibm.com) | |
10 | */ | |
11 | ||
12 | #undef DEBUG | |
13 | #undef DEBUGDATA | |
14 | #undef DEBUGCCW | |
15 | ||
16 | #include <linux/module.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/types.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/timer.h> | |
24 | #include <linux/bitops.h> | |
25 | ||
26 | #include <linux/signal.h> | |
27 | #include <linux/string.h> | |
28 | ||
29 | #include <linux/ip.h> | |
30 | #include <linux/if_arp.h> | |
31 | #include <linux/tcp.h> | |
32 | #include <linux/skbuff.h> | |
33 | #include <linux/ctype.h> | |
34 | #include <net/dst.h> | |
35 | ||
36 | #include <linux/io.h> | |
37 | #include <asm/ccwdev.h> | |
38 | #include <asm/ccwgroup.h> | |
39 | #include <linux/uaccess.h> | |
40 | ||
41 | #include <asm/idals.h> | |
42 | ||
43 | #include "fsm.h" | |
44 | #include "cu3088.h" | |
45 | ||
46 | #include "ctcm_dbug.h" | |
47 | #include "ctcm_main.h" | |
48 | #include "ctcm_fsms.h" | |
49 | ||
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", | |
59 | }; | |
60 | ||
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", | |
69 | }; | |
70 | ||
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", | |
95 | /* | |
96 | * additional MPC events | |
97 | */ | |
98 | [CTC_EVENT_SEND_XID] = "XID Exchange", | |
99 | [CTC_EVENT_RSWEEP_TIMER] = "MPC Group Sweep Timer", | |
100 | }; | |
101 | ||
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", | |
119 | /* | |
120 | * additional MPC states | |
121 | */ | |
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 ", | |
129 | }; | |
130 | ||
131 | static void ctcm_action_nop(fsm_instance *fi, int event, void *arg); | |
132 | ||
133 | /* | |
134 | * ----- static ctcm actions for channel statemachine ----- | |
135 | * | |
136 | */ | |
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); | |
155 | ||
156 | /* | |
157 | * ----- static ctcmpc actions for ctcmpc channel statemachine ----- | |
158 | * | |
159 | */ | |
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); | |
163 | /* shared : | |
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); | |
178 | */ | |
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); | |
183 | ||
184 | /** | |
185 | * Check return code of a preceeding ccw_device call, halt_IO etc... | |
186 | * | |
187 | * ch : The channel, the error belongs to. | |
188 | * Returns the error code (!= 0) to inspect. | |
189 | */ | |
190 | void ctcm_ccw_check_rc(struct channel *ch, int rc, char *msg) | |
191 | { | |
192 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, | |
193 | "ccw error %s (%s): %04x\n", ch->id, msg, rc); | |
194 | switch (rc) { | |
195 | case -EBUSY: | |
196 | ctcm_pr_warn("%s (%s): Busy !\n", ch->id, msg); | |
197 | fsm_event(ch->fsm, CTC_EVENT_IO_EBUSY, ch); | |
198 | break; | |
199 | case -ENODEV: | |
200 | ctcm_pr_emerg("%s (%s): Invalid device called for IO\n", | |
201 | ch->id, msg); | |
202 | fsm_event(ch->fsm, CTC_EVENT_IO_ENODEV, ch); | |
203 | break; | |
204 | default: | |
205 | ctcm_pr_emerg("%s (%s): Unknown error in do_IO %04x\n", | |
206 | ch->id, msg, rc); | |
207 | fsm_event(ch->fsm, CTC_EVENT_IO_UNKNOWN, ch); | |
208 | } | |
209 | } | |
210 | ||
211 | void ctcm_purge_skb_queue(struct sk_buff_head *q) | |
212 | { | |
213 | struct sk_buff *skb; | |
214 | ||
215 | CTCM_DBF_TEXT(TRACE, 3, __FUNCTION__); | |
216 | ||
217 | while ((skb = skb_dequeue(q))) { | |
218 | atomic_dec(&skb->users); | |
219 | dev_kfree_skb_any(skb); | |
220 | } | |
221 | } | |
222 | ||
223 | /** | |
224 | * NOP action for statemachines | |
225 | */ | |
226 | static void ctcm_action_nop(fsm_instance *fi, int event, void *arg) | |
227 | { | |
228 | } | |
229 | ||
230 | /* | |
231 | * Actions for channel - statemachines. | |
232 | */ | |
233 | ||
234 | /** | |
235 | * Normal data has been send. Free the corresponding | |
236 | * skb (it's in io_queue), reset dev->tbusy and | |
237 | * revert to idle state. | |
238 | * | |
239 | * fi An instance of a channel statemachine. | |
240 | * event The event, just happened. | |
241 | * arg Generic pointer, casted from channel * upon call. | |
242 | */ | |
243 | static void chx_txdone(fsm_instance *fi, int event, void *arg) | |
244 | { | |
245 | struct channel *ch = arg; | |
246 | struct net_device *dev = ch->netdev; | |
247 | struct ctcm_priv *priv = dev->priv; | |
248 | struct sk_buff *skb; | |
249 | int first = 1; | |
250 | int i; | |
251 | unsigned long duration; | |
252 | struct timespec done_stamp = current_kernel_time(); /* xtime */ | |
253 | ||
254 | duration = | |
255 | (done_stamp.tv_sec - ch->prof.send_stamp.tv_sec) * 1000000 + | |
256 | (done_stamp.tv_nsec - ch->prof.send_stamp.tv_nsec) / 1000; | |
257 | if (duration > ch->prof.tx_time) | |
258 | ch->prof.tx_time = duration; | |
259 | ||
23d805b6 | 260 | if (ch->irb->scsw.cmd.count != 0) |
293d984f | 261 | ctcm_pr_debug("%s: TX not complete, remaining %d bytes\n", |
23d805b6 | 262 | dev->name, ch->irb->scsw.cmd.count); |
293d984f PT |
263 | fsm_deltimer(&ch->timer); |
264 | while ((skb = skb_dequeue(&ch->io_queue))) { | |
265 | priv->stats.tx_packets++; | |
266 | priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH; | |
267 | if (first) { | |
268 | priv->stats.tx_bytes += 2; | |
269 | first = 0; | |
270 | } | |
271 | atomic_dec(&skb->users); | |
272 | dev_kfree_skb_irq(skb); | |
273 | } | |
274 | spin_lock(&ch->collect_lock); | |
275 | clear_normalized_cda(&ch->ccw[4]); | |
276 | if (ch->collect_len > 0) { | |
277 | int rc; | |
278 | ||
279 | if (ctcm_checkalloc_buffer(ch)) { | |
280 | spin_unlock(&ch->collect_lock); | |
281 | return; | |
282 | } | |
283 | ch->trans_skb->data = ch->trans_skb_data; | |
284 | skb_reset_tail_pointer(ch->trans_skb); | |
285 | ch->trans_skb->len = 0; | |
286 | if (ch->prof.maxmulti < (ch->collect_len + 2)) | |
287 | ch->prof.maxmulti = ch->collect_len + 2; | |
288 | if (ch->prof.maxcqueue < skb_queue_len(&ch->collect_queue)) | |
289 | ch->prof.maxcqueue = skb_queue_len(&ch->collect_queue); | |
290 | *((__u16 *)skb_put(ch->trans_skb, 2)) = ch->collect_len + 2; | |
291 | i = 0; | |
292 | while ((skb = skb_dequeue(&ch->collect_queue))) { | |
293 | skb_copy_from_linear_data(skb, | |
294 | skb_put(ch->trans_skb, skb->len), skb->len); | |
295 | priv->stats.tx_packets++; | |
296 | priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH; | |
297 | atomic_dec(&skb->users); | |
298 | dev_kfree_skb_irq(skb); | |
299 | i++; | |
300 | } | |
301 | ch->collect_len = 0; | |
302 | spin_unlock(&ch->collect_lock); | |
303 | ch->ccw[1].count = ch->trans_skb->len; | |
304 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
305 | ch->prof.send_stamp = current_kernel_time(); /* xtime */ | |
306 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
307 | (unsigned long)ch, 0xff, 0); | |
308 | ch->prof.doios_multi++; | |
309 | if (rc != 0) { | |
310 | priv->stats.tx_dropped += i; | |
311 | priv->stats.tx_errors += i; | |
312 | fsm_deltimer(&ch->timer); | |
313 | ctcm_ccw_check_rc(ch, rc, "chained TX"); | |
314 | } | |
315 | } else { | |
316 | spin_unlock(&ch->collect_lock); | |
317 | fsm_newstate(fi, CTC_STATE_TXIDLE); | |
318 | } | |
319 | ctcm_clear_busy_do(dev); | |
320 | } | |
321 | ||
322 | /** | |
323 | * Initial data is sent. | |
324 | * Notify device statemachine that we are up and | |
325 | * running. | |
326 | * | |
327 | * fi An instance of a channel statemachine. | |
328 | * event The event, just happened. | |
329 | * arg Generic pointer, casted from channel * upon call. | |
330 | */ | |
331 | void ctcm_chx_txidle(fsm_instance *fi, int event, void *arg) | |
332 | { | |
333 | struct channel *ch = arg; | |
334 | struct net_device *dev = ch->netdev; | |
335 | struct ctcm_priv *priv = dev->priv; | |
336 | ||
337 | CTCM_DBF_TEXT(TRACE, 6, __FUNCTION__); | |
338 | fsm_deltimer(&ch->timer); | |
339 | fsm_newstate(fi, CTC_STATE_TXIDLE); | |
340 | fsm_event(priv->fsm, DEV_EVENT_TXUP, ch->netdev); | |
341 | } | |
342 | ||
343 | /** | |
344 | * Got normal data, check for sanity, queue it up, allocate new buffer | |
345 | * trigger bottom half, and initiate next read. | |
346 | * | |
347 | * fi An instance of a channel statemachine. | |
348 | * event The event, just happened. | |
349 | * arg Generic pointer, casted from channel * upon call. | |
350 | */ | |
351 | static void chx_rx(fsm_instance *fi, int event, void *arg) | |
352 | { | |
353 | struct channel *ch = arg; | |
354 | struct net_device *dev = ch->netdev; | |
355 | struct ctcm_priv *priv = dev->priv; | |
23d805b6 | 356 | int len = ch->max_bufsize - ch->irb->scsw.cmd.count; |
293d984f PT |
357 | struct sk_buff *skb = ch->trans_skb; |
358 | __u16 block_len = *((__u16 *)skb->data); | |
359 | int check_len; | |
360 | int rc; | |
361 | ||
362 | fsm_deltimer(&ch->timer); | |
363 | if (len < 8) { | |
364 | ctcm_pr_debug("%s: got packet with length %d < 8\n", | |
365 | dev->name, len); | |
366 | priv->stats.rx_dropped++; | |
367 | priv->stats.rx_length_errors++; | |
368 | goto again; | |
369 | } | |
370 | if (len > ch->max_bufsize) { | |
371 | ctcm_pr_debug("%s: got packet with length %d > %d\n", | |
372 | dev->name, len, ch->max_bufsize); | |
373 | priv->stats.rx_dropped++; | |
374 | priv->stats.rx_length_errors++; | |
375 | goto again; | |
376 | } | |
377 | ||
378 | /* | |
379 | * VM TCP seems to have a bug sending 2 trailing bytes of garbage. | |
380 | */ | |
381 | switch (ch->protocol) { | |
382 | case CTCM_PROTO_S390: | |
383 | case CTCM_PROTO_OS390: | |
384 | check_len = block_len + 2; | |
385 | break; | |
386 | default: | |
387 | check_len = block_len; | |
388 | break; | |
389 | } | |
390 | if ((len < block_len) || (len > check_len)) { | |
391 | ctcm_pr_debug("%s: got block length %d != rx length %d\n", | |
392 | dev->name, block_len, len); | |
393 | if (do_debug) | |
394 | ctcmpc_dump_skb(skb, 0); | |
395 | ||
396 | *((__u16 *)skb->data) = len; | |
397 | priv->stats.rx_dropped++; | |
398 | priv->stats.rx_length_errors++; | |
399 | goto again; | |
400 | } | |
401 | block_len -= 2; | |
402 | if (block_len > 0) { | |
403 | *((__u16 *)skb->data) = block_len; | |
404 | ctcm_unpack_skb(ch, skb); | |
405 | } | |
406 | again: | |
407 | skb->data = ch->trans_skb_data; | |
408 | skb_reset_tail_pointer(skb); | |
409 | skb->len = 0; | |
410 | if (ctcm_checkalloc_buffer(ch)) | |
411 | return; | |
412 | ch->ccw[1].count = ch->max_bufsize; | |
413 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
414 | (unsigned long)ch, 0xff, 0); | |
415 | if (rc != 0) | |
416 | ctcm_ccw_check_rc(ch, rc, "normal RX"); | |
417 | } | |
418 | ||
419 | /** | |
420 | * Initialize connection by sending a __u16 of value 0. | |
421 | * | |
422 | * fi An instance of a channel statemachine. | |
423 | * event The event, just happened. | |
424 | * arg Generic pointer, casted from channel * upon call. | |
425 | */ | |
426 | static void chx_firstio(fsm_instance *fi, int event, void *arg) | |
427 | { | |
428 | struct channel *ch = arg; | |
429 | int rc; | |
430 | ||
431 | CTCM_DBF_TEXT(TRACE, 6, __FUNCTION__); | |
432 | ||
433 | if (fsm_getstate(fi) == CTC_STATE_TXIDLE) | |
434 | ctcm_pr_debug("%s: remote side issued READ?, init.\n", ch->id); | |
435 | fsm_deltimer(&ch->timer); | |
436 | if (ctcm_checkalloc_buffer(ch)) | |
437 | return; | |
438 | if ((fsm_getstate(fi) == CTC_STATE_SETUPWAIT) && | |
439 | (ch->protocol == CTCM_PROTO_OS390)) { | |
440 | /* OS/390 resp. z/OS */ | |
441 | if (CHANNEL_DIRECTION(ch->flags) == READ) { | |
442 | *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN; | |
443 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, | |
444 | CTC_EVENT_TIMER, ch); | |
445 | chx_rxidle(fi, event, arg); | |
446 | } else { | |
447 | struct net_device *dev = ch->netdev; | |
448 | struct ctcm_priv *priv = dev->priv; | |
449 | fsm_newstate(fi, CTC_STATE_TXIDLE); | |
450 | fsm_event(priv->fsm, DEV_EVENT_TXUP, dev); | |
451 | } | |
452 | return; | |
453 | } | |
454 | ||
455 | /* | |
456 | * Don't setup a timer for receiving the initial RX frame | |
457 | * if in compatibility mode, since VM TCP delays the initial | |
458 | * frame until it has some data to send. | |
459 | */ | |
460 | if ((CHANNEL_DIRECTION(ch->flags) == WRITE) || | |
461 | (ch->protocol != CTCM_PROTO_S390)) | |
462 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
463 | ||
464 | *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN; | |
465 | ch->ccw[1].count = 2; /* Transfer only length */ | |
466 | ||
467 | fsm_newstate(fi, (CHANNEL_DIRECTION(ch->flags) == READ) | |
468 | ? CTC_STATE_RXINIT : CTC_STATE_TXINIT); | |
469 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
470 | (unsigned long)ch, 0xff, 0); | |
471 | if (rc != 0) { | |
472 | fsm_deltimer(&ch->timer); | |
473 | fsm_newstate(fi, CTC_STATE_SETUPWAIT); | |
474 | ctcm_ccw_check_rc(ch, rc, "init IO"); | |
475 | } | |
476 | /* | |
477 | * If in compatibility mode since we don't setup a timer, we | |
478 | * also signal RX channel up immediately. This enables us | |
479 | * to send packets early which in turn usually triggers some | |
480 | * reply from VM TCP which brings up the RX channel to it's | |
481 | * final state. | |
482 | */ | |
483 | if ((CHANNEL_DIRECTION(ch->flags) == READ) && | |
484 | (ch->protocol == CTCM_PROTO_S390)) { | |
485 | struct net_device *dev = ch->netdev; | |
486 | struct ctcm_priv *priv = dev->priv; | |
487 | fsm_event(priv->fsm, DEV_EVENT_RXUP, dev); | |
488 | } | |
489 | } | |
490 | ||
491 | /** | |
492 | * Got initial data, check it. If OK, | |
493 | * notify device statemachine that we are up and | |
494 | * running. | |
495 | * | |
496 | * fi An instance of a channel statemachine. | |
497 | * event The event, just happened. | |
498 | * arg Generic pointer, casted from channel * upon call. | |
499 | */ | |
500 | static void chx_rxidle(fsm_instance *fi, int event, void *arg) | |
501 | { | |
502 | struct channel *ch = arg; | |
503 | struct net_device *dev = ch->netdev; | |
504 | struct ctcm_priv *priv = dev->priv; | |
505 | __u16 buflen; | |
506 | int rc; | |
507 | ||
508 | CTCM_DBF_TEXT(TRACE, 6, __FUNCTION__); | |
509 | fsm_deltimer(&ch->timer); | |
510 | buflen = *((__u16 *)ch->trans_skb->data); | |
511 | if (do_debug) | |
512 | ctcm_pr_debug("%s: Initial RX count %d\n", dev->name, buflen); | |
513 | ||
514 | if (buflen >= CTCM_INITIAL_BLOCKLEN) { | |
515 | if (ctcm_checkalloc_buffer(ch)) | |
516 | return; | |
517 | ch->ccw[1].count = ch->max_bufsize; | |
518 | fsm_newstate(fi, CTC_STATE_RXIDLE); | |
519 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
520 | (unsigned long)ch, 0xff, 0); | |
521 | if (rc != 0) { | |
522 | fsm_newstate(fi, CTC_STATE_RXINIT); | |
523 | ctcm_ccw_check_rc(ch, rc, "initial RX"); | |
524 | } else | |
525 | fsm_event(priv->fsm, DEV_EVENT_RXUP, dev); | |
526 | } else { | |
527 | if (do_debug) | |
528 | ctcm_pr_debug("%s: Initial RX count %d not %d\n", | |
529 | dev->name, buflen, CTCM_INITIAL_BLOCKLEN); | |
530 | chx_firstio(fi, event, arg); | |
531 | } | |
532 | } | |
533 | ||
534 | /** | |
535 | * Set channel into extended mode. | |
536 | * | |
537 | * fi An instance of a channel statemachine. | |
538 | * event The event, just happened. | |
539 | * arg Generic pointer, casted from channel * upon call. | |
540 | */ | |
541 | static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg) | |
542 | { | |
543 | struct channel *ch = arg; | |
544 | int rc; | |
545 | unsigned long saveflags = 0; | |
546 | int timeout = CTCM_TIME_5_SEC; | |
547 | ||
548 | fsm_deltimer(&ch->timer); | |
549 | if (IS_MPC(ch)) { | |
550 | timeout = 1500; | |
551 | if (do_debug) | |
552 | ctcm_pr_debug("ctcm enter: %s(): cp=%i ch=0x%p id=%s\n", | |
553 | __FUNCTION__, smp_processor_id(), ch, ch->id); | |
554 | } | |
555 | fsm_addtimer(&ch->timer, timeout, CTC_EVENT_TIMER, ch); | |
556 | fsm_newstate(fi, CTC_STATE_SETUPWAIT); | |
557 | if (do_debug_ccw && IS_MPC(ch)) | |
558 | ctcmpc_dumpit((char *)&ch->ccw[6], sizeof(struct ccw1) * 2); | |
559 | ||
560 | if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */ | |
561 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
562 | /* Such conditional locking is undeterministic in | |
563 | * static view. => ignore sparse warnings here. */ | |
564 | ||
565 | rc = ccw_device_start(ch->cdev, &ch->ccw[6], | |
566 | (unsigned long)ch, 0xff, 0); | |
567 | if (event == CTC_EVENT_TIMER) /* see above comments */ | |
568 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
569 | if (rc != 0) { | |
570 | fsm_deltimer(&ch->timer); | |
571 | fsm_newstate(fi, CTC_STATE_STARTWAIT); | |
572 | ctcm_ccw_check_rc(ch, rc, "set Mode"); | |
573 | } else | |
574 | ch->retry = 0; | |
575 | } | |
576 | ||
577 | /** | |
578 | * Setup channel. | |
579 | * | |
580 | * fi An instance of a channel statemachine. | |
581 | * event The event, just happened. | |
582 | * arg Generic pointer, casted from channel * upon call. | |
583 | */ | |
584 | static void ctcm_chx_start(fsm_instance *fi, int event, void *arg) | |
585 | { | |
586 | struct channel *ch = arg; | |
587 | int rc; | |
588 | struct net_device *dev; | |
589 | unsigned long saveflags; | |
590 | ||
591 | CTCM_DBF_TEXT(TRACE, 5, __FUNCTION__); | |
592 | if (ch == NULL) { | |
593 | ctcm_pr_warn("chx_start ch=NULL\n"); | |
594 | return; | |
595 | } | |
596 | if (ch->netdev == NULL) { | |
597 | ctcm_pr_warn("chx_start dev=NULL, id=%s\n", ch->id); | |
598 | return; | |
599 | } | |
600 | dev = ch->netdev; | |
601 | ||
602 | if (do_debug) | |
603 | ctcm_pr_debug("%s: %s channel start\n", dev->name, | |
604 | (CHANNEL_DIRECTION(ch->flags) == READ) ? "RX" : "TX"); | |
605 | ||
606 | if (ch->trans_skb != NULL) { | |
607 | clear_normalized_cda(&ch->ccw[1]); | |
608 | dev_kfree_skb(ch->trans_skb); | |
609 | ch->trans_skb = NULL; | |
610 | } | |
611 | if (CHANNEL_DIRECTION(ch->flags) == READ) { | |
612 | ch->ccw[1].cmd_code = CCW_CMD_READ; | |
613 | ch->ccw[1].flags = CCW_FLAG_SLI; | |
614 | ch->ccw[1].count = 0; | |
615 | } else { | |
616 | ch->ccw[1].cmd_code = CCW_CMD_WRITE; | |
617 | ch->ccw[1].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
618 | ch->ccw[1].count = 0; | |
619 | } | |
620 | if (ctcm_checkalloc_buffer(ch)) { | |
621 | ctcm_pr_notice("%s: %s trans_skb allocation delayed " | |
622 | "until first transfer\n", dev->name, | |
623 | (CHANNEL_DIRECTION(ch->flags) == READ) ? "RX" : "TX"); | |
624 | } | |
625 | ||
626 | ch->ccw[0].cmd_code = CCW_CMD_PREPARE; | |
627 | ch->ccw[0].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
628 | ch->ccw[0].count = 0; | |
629 | ch->ccw[0].cda = 0; | |
630 | ch->ccw[2].cmd_code = CCW_CMD_NOOP; /* jointed CE + DE */ | |
631 | ch->ccw[2].flags = CCW_FLAG_SLI; | |
632 | ch->ccw[2].count = 0; | |
633 | ch->ccw[2].cda = 0; | |
634 | memcpy(&ch->ccw[3], &ch->ccw[0], sizeof(struct ccw1) * 3); | |
635 | ch->ccw[4].cda = 0; | |
636 | ch->ccw[4].flags &= ~CCW_FLAG_IDA; | |
637 | ||
638 | fsm_newstate(fi, CTC_STATE_STARTWAIT); | |
639 | fsm_addtimer(&ch->timer, 1000, CTC_EVENT_TIMER, ch); | |
640 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
641 | rc = ccw_device_halt(ch->cdev, (unsigned long)ch); | |
642 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
643 | if (rc != 0) { | |
644 | if (rc != -EBUSY) | |
645 | fsm_deltimer(&ch->timer); | |
646 | ctcm_ccw_check_rc(ch, rc, "initial HaltIO"); | |
647 | } | |
648 | } | |
649 | ||
650 | /** | |
651 | * Shutdown a channel. | |
652 | * | |
653 | * fi An instance of a channel statemachine. | |
654 | * event The event, just happened. | |
655 | * arg Generic pointer, casted from channel * upon call. | |
656 | */ | |
657 | static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg) | |
658 | { | |
659 | struct channel *ch = arg; | |
660 | unsigned long saveflags = 0; | |
661 | int rc; | |
662 | int oldstate; | |
663 | ||
664 | CTCM_DBF_TEXT(TRACE, 2, __FUNCTION__); | |
665 | fsm_deltimer(&ch->timer); | |
666 | if (IS_MPC(ch)) | |
667 | fsm_deltimer(&ch->sweep_timer); | |
668 | ||
669 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
670 | ||
671 | if (event == CTC_EVENT_STOP) /* only for STOP not yet locked */ | |
672 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
673 | /* Such conditional locking is undeterministic in | |
674 | * static view. => ignore sparse warnings here. */ | |
675 | oldstate = fsm_getstate(fi); | |
676 | fsm_newstate(fi, CTC_STATE_TERM); | |
677 | rc = ccw_device_halt(ch->cdev, (unsigned long)ch); | |
678 | ||
679 | if (event == CTC_EVENT_STOP) | |
680 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
681 | /* see remark above about conditional locking */ | |
682 | ||
683 | if (rc != 0 && rc != -EBUSY) { | |
684 | fsm_deltimer(&ch->timer); | |
685 | if (event != CTC_EVENT_STOP) { | |
686 | fsm_newstate(fi, oldstate); | |
687 | ctcm_ccw_check_rc(ch, rc, (char *)__FUNCTION__); | |
688 | } | |
689 | } | |
690 | } | |
691 | ||
692 | /** | |
693 | * Cleanup helper for chx_fail and chx_stopped | |
694 | * cleanup channels queue and notify interface statemachine. | |
695 | * | |
696 | * fi An instance of a channel statemachine. | |
697 | * state The next state (depending on caller). | |
698 | * ch The channel to operate on. | |
699 | */ | |
700 | static void ctcm_chx_cleanup(fsm_instance *fi, int state, | |
701 | struct channel *ch) | |
702 | { | |
703 | struct net_device *dev = ch->netdev; | |
704 | struct ctcm_priv *priv = dev->priv; | |
705 | ||
706 | CTCM_DBF_TEXT(TRACE, 3, __FUNCTION__); | |
707 | ||
708 | fsm_deltimer(&ch->timer); | |
709 | if (IS_MPC(ch)) | |
710 | fsm_deltimer(&ch->sweep_timer); | |
711 | ||
712 | fsm_newstate(fi, state); | |
713 | if (state == CTC_STATE_STOPPED && ch->trans_skb != NULL) { | |
714 | clear_normalized_cda(&ch->ccw[1]); | |
715 | dev_kfree_skb_any(ch->trans_skb); | |
716 | ch->trans_skb = NULL; | |
717 | } | |
718 | ||
719 | ch->th_seg = 0x00; | |
720 | ch->th_seq_num = 0x00; | |
721 | if (CHANNEL_DIRECTION(ch->flags) == READ) { | |
722 | skb_queue_purge(&ch->io_queue); | |
723 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
724 | } else { | |
725 | ctcm_purge_skb_queue(&ch->io_queue); | |
726 | if (IS_MPC(ch)) | |
727 | ctcm_purge_skb_queue(&ch->sweep_queue); | |
728 | spin_lock(&ch->collect_lock); | |
729 | ctcm_purge_skb_queue(&ch->collect_queue); | |
730 | ch->collect_len = 0; | |
731 | spin_unlock(&ch->collect_lock); | |
732 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
733 | } | |
734 | } | |
735 | ||
736 | /** | |
737 | * A channel has successfully been halted. | |
738 | * Cleanup it's queue and notify interface statemachine. | |
739 | * | |
740 | * fi An instance of a channel statemachine. | |
741 | * event The event, just happened. | |
742 | * arg Generic pointer, casted from channel * upon call. | |
743 | */ | |
744 | static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg) | |
745 | { | |
746 | CTCM_DBF_TEXT(TRACE, 3, __FUNCTION__); | |
747 | ctcm_chx_cleanup(fi, CTC_STATE_STOPPED, arg); | |
748 | } | |
749 | ||
750 | /** | |
751 | * A stop command from device statemachine arrived and we are in | |
752 | * not operational mode. Set state to stopped. | |
753 | * | |
754 | * fi An instance of a channel statemachine. | |
755 | * event The event, just happened. | |
756 | * arg Generic pointer, casted from channel * upon call. | |
757 | */ | |
758 | static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg) | |
759 | { | |
760 | fsm_newstate(fi, CTC_STATE_STOPPED); | |
761 | } | |
762 | ||
763 | /** | |
764 | * A machine check for no path, not operational status or gone device has | |
765 | * happened. | |
766 | * Cleanup queue and notify interface statemachine. | |
767 | * | |
768 | * fi An instance of a channel statemachine. | |
769 | * event The event, just happened. | |
770 | * arg Generic pointer, casted from channel * upon call. | |
771 | */ | |
772 | static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg) | |
773 | { | |
774 | CTCM_DBF_TEXT(TRACE, 3, __FUNCTION__); | |
775 | ctcm_chx_cleanup(fi, CTC_STATE_NOTOP, arg); | |
776 | } | |
777 | ||
778 | /** | |
779 | * Handle error during setup of channel. | |
780 | * | |
781 | * fi An instance of a channel statemachine. | |
782 | * event The event, just happened. | |
783 | * arg Generic pointer, casted from channel * upon call. | |
784 | */ | |
785 | static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg) | |
786 | { | |
787 | struct channel *ch = arg; | |
788 | struct net_device *dev = ch->netdev; | |
789 | struct ctcm_priv *priv = dev->priv; | |
790 | ||
791 | /* | |
792 | * Special case: Got UC_RCRESET on setmode. | |
793 | * This means that remote side isn't setup. In this case | |
794 | * simply retry after some 10 secs... | |
795 | */ | |
796 | if ((fsm_getstate(fi) == CTC_STATE_SETUPWAIT) && | |
797 | ((event == CTC_EVENT_UC_RCRESET) || | |
798 | (event == CTC_EVENT_UC_RSRESET))) { | |
799 | fsm_newstate(fi, CTC_STATE_STARTRETRY); | |
800 | fsm_deltimer(&ch->timer); | |
801 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
802 | if (!IS_MPC(ch) && (CHANNEL_DIRECTION(ch->flags) == READ)) { | |
803 | int rc = ccw_device_halt(ch->cdev, (unsigned long)ch); | |
804 | if (rc != 0) | |
805 | ctcm_ccw_check_rc(ch, rc, | |
806 | "HaltIO in chx_setuperr"); | |
807 | } | |
808 | return; | |
809 | } | |
810 | ||
811 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_CRIT, | |
812 | "%s : %s error during %s channel setup state=%s\n", | |
813 | dev->name, ctc_ch_event_names[event], | |
814 | (CHANNEL_DIRECTION(ch->flags) == READ) ? "RX" : "TX", | |
815 | fsm_getstate_str(fi)); | |
816 | ||
817 | if (CHANNEL_DIRECTION(ch->flags) == READ) { | |
818 | fsm_newstate(fi, CTC_STATE_RXERR); | |
819 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
820 | } else { | |
821 | fsm_newstate(fi, CTC_STATE_TXERR); | |
822 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
823 | } | |
824 | } | |
825 | ||
826 | /** | |
827 | * Restart a channel after an error. | |
828 | * | |
829 | * fi An instance of a channel statemachine. | |
830 | * event The event, just happened. | |
831 | * arg Generic pointer, casted from channel * upon call. | |
832 | */ | |
833 | static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg) | |
834 | { | |
835 | struct channel *ch = arg; | |
836 | struct net_device *dev = ch->netdev; | |
837 | unsigned long saveflags = 0; | |
838 | int oldstate; | |
839 | int rc; | |
840 | ||
841 | CTCM_DBF_TEXT(TRACE, CTC_DBF_NOTICE, __FUNCTION__); | |
842 | fsm_deltimer(&ch->timer); | |
843 | ctcm_pr_debug("%s: %s channel restart\n", dev->name, | |
844 | (CHANNEL_DIRECTION(ch->flags) == READ) ? "RX" : "TX"); | |
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); | |
856 | if (rc != 0) { | |
857 | if (rc != -EBUSY) { | |
858 | fsm_deltimer(&ch->timer); | |
859 | fsm_newstate(fi, oldstate); | |
860 | } | |
861 | ctcm_ccw_check_rc(ch, rc, "HaltIO in ctcm_chx_restart"); | |
862 | } | |
863 | } | |
864 | ||
865 | /** | |
866 | * Handle error during RX initial handshake (exchange of | |
867 | * 0-length block header) | |
868 | * | |
869 | * fi An instance of a channel statemachine. | |
870 | * event The event, just happened. | |
871 | * arg Generic pointer, casted from channel * upon call. | |
872 | */ | |
873 | static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg) | |
874 | { | |
875 | struct channel *ch = arg; | |
876 | struct net_device *dev = ch->netdev; | |
877 | struct ctcm_priv *priv = dev->priv; | |
878 | ||
879 | CTCM_DBF_TEXT(SETUP, 3, __FUNCTION__); | |
880 | if (event == CTC_EVENT_TIMER) { | |
881 | if (!IS_MPCDEV(dev)) | |
882 | /* TODO : check if MPC deletes timer somewhere */ | |
883 | fsm_deltimer(&ch->timer); | |
884 | ctcm_pr_debug("%s: Timeout during RX init handshake\n", | |
885 | dev->name); | |
886 | if (ch->retry++ < 3) | |
887 | ctcm_chx_restart(fi, event, arg); | |
888 | else { | |
889 | fsm_newstate(fi, CTC_STATE_RXERR); | |
890 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
891 | } | |
892 | } else | |
893 | ctcm_pr_warn("%s: Error during RX init handshake\n", dev->name); | |
894 | } | |
895 | ||
896 | /** | |
897 | * Notify device statemachine if we gave up initialization | |
898 | * of RX channel. | |
899 | * | |
900 | * fi An instance of a channel statemachine. | |
901 | * event The event, just happened. | |
902 | * arg Generic pointer, casted from channel * upon call. | |
903 | */ | |
904 | static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg) | |
905 | { | |
906 | struct channel *ch = arg; | |
907 | struct net_device *dev = ch->netdev; | |
908 | struct ctcm_priv *priv = dev->priv; | |
909 | ||
910 | CTCM_DBF_TEXT(SETUP, 3, __FUNCTION__); | |
911 | fsm_newstate(fi, CTC_STATE_RXERR); | |
912 | ctcm_pr_warn("%s: RX busy. Initialization failed\n", dev->name); | |
913 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
914 | } | |
915 | ||
916 | /** | |
917 | * Handle RX Unit check remote reset (remote disconnected) | |
918 | * | |
919 | * fi An instance of a channel statemachine. | |
920 | * event The event, just happened. | |
921 | * arg Generic pointer, casted from channel * upon call. | |
922 | */ | |
923 | static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg) | |
924 | { | |
925 | struct channel *ch = arg; | |
926 | struct channel *ch2; | |
927 | struct net_device *dev = ch->netdev; | |
928 | struct ctcm_priv *priv = dev->priv; | |
929 | ||
930 | CTCM_DBF_DEV_NAME(TRACE, dev, "Got remote disconnect, re-initializing"); | |
931 | fsm_deltimer(&ch->timer); | |
932 | if (do_debug) | |
933 | ctcm_pr_debug("%s: Got remote disconnect, " | |
934 | "re-initializing ...\n", dev->name); | |
935 | /* | |
936 | * Notify device statemachine | |
937 | */ | |
938 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
939 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
940 | ||
941 | fsm_newstate(fi, CTC_STATE_DTERM); | |
942 | ch2 = priv->channel[WRITE]; | |
943 | fsm_newstate(ch2->fsm, CTC_STATE_DTERM); | |
944 | ||
945 | ccw_device_halt(ch->cdev, (unsigned long)ch); | |
946 | ccw_device_halt(ch2->cdev, (unsigned long)ch2); | |
947 | } | |
948 | ||
949 | /** | |
950 | * Handle error during TX channel initialization. | |
951 | * | |
952 | * fi An instance of a channel statemachine. | |
953 | * event The event, just happened. | |
954 | * arg Generic pointer, casted from channel * upon call. | |
955 | */ | |
956 | static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg) | |
957 | { | |
958 | struct channel *ch = arg; | |
959 | struct net_device *dev = ch->netdev; | |
960 | struct ctcm_priv *priv = dev->priv; | |
961 | ||
962 | if (event == CTC_EVENT_TIMER) { | |
963 | fsm_deltimer(&ch->timer); | |
964 | CTCM_DBF_DEV_NAME(ERROR, dev, | |
965 | "Timeout during TX init handshake"); | |
966 | if (ch->retry++ < 3) | |
967 | ctcm_chx_restart(fi, event, arg); | |
968 | else { | |
969 | fsm_newstate(fi, CTC_STATE_TXERR); | |
970 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
971 | } | |
972 | } else { | |
973 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, | |
974 | "%s : %s error during channel setup state=%s", | |
975 | dev->name, ctc_ch_event_names[event], | |
976 | fsm_getstate_str(fi)); | |
977 | ||
978 | ctcm_pr_warn("%s: Error during TX init handshake\n", dev->name); | |
979 | } | |
980 | } | |
981 | ||
982 | /** | |
983 | * Handle TX timeout by retrying operation. | |
984 | * | |
985 | * fi An instance of a channel statemachine. | |
986 | * event The event, just happened. | |
987 | * arg Generic pointer, casted from channel * upon call. | |
988 | */ | |
989 | static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg) | |
990 | { | |
991 | struct channel *ch = arg; | |
992 | struct net_device *dev = ch->netdev; | |
993 | struct ctcm_priv *priv = dev->priv; | |
994 | struct sk_buff *skb; | |
995 | ||
996 | if (do_debug) | |
997 | ctcm_pr_debug("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s\n", | |
998 | __FUNCTION__, smp_processor_id(), ch, ch->id); | |
999 | ||
1000 | fsm_deltimer(&ch->timer); | |
1001 | if (ch->retry++ > 3) { | |
1002 | struct mpc_group *gptr = priv->mpcg; | |
1003 | ctcm_pr_debug("%s: TX retry failed, restarting channel\n", | |
1004 | dev->name); | |
1005 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
1006 | /* call restart if not MPC or if MPC and mpcg fsm is ready. | |
1007 | use gptr as mpc indicator */ | |
1008 | if (!(gptr && (fsm_getstate(gptr->fsm) != MPCG_STATE_READY))) | |
1009 | ctcm_chx_restart(fi, event, arg); | |
1010 | goto done; | |
1011 | } | |
1012 | ||
1013 | ctcm_pr_debug("%s: TX retry %d\n", dev->name, ch->retry); | |
1014 | skb = skb_peek(&ch->io_queue); | |
1015 | if (skb) { | |
1016 | int rc = 0; | |
1017 | unsigned long saveflags = 0; | |
1018 | clear_normalized_cda(&ch->ccw[4]); | |
1019 | ch->ccw[4].count = skb->len; | |
1020 | if (set_normalized_cda(&ch->ccw[4], skb->data)) { | |
1021 | ctcm_pr_debug("%s: IDAL alloc failed, chan restart\n", | |
1022 | dev->name); | |
1023 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
1024 | ctcm_chx_restart(fi, event, arg); | |
1025 | goto done; | |
1026 | } | |
1027 | fsm_addtimer(&ch->timer, 1000, CTC_EVENT_TIMER, ch); | |
1028 | if (event == CTC_EVENT_TIMER) /* for TIMER not yet locked */ | |
1029 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
1030 | /* Such conditional locking is a known problem for | |
1031 | * sparse because its undeterministic in static view. | |
1032 | * Warnings should be ignored here. */ | |
1033 | if (do_debug_ccw) | |
1034 | ctcmpc_dumpit((char *)&ch->ccw[3], | |
1035 | sizeof(struct ccw1) * 3); | |
1036 | ||
1037 | rc = ccw_device_start(ch->cdev, &ch->ccw[3], | |
1038 | (unsigned long)ch, 0xff, 0); | |
1039 | if (event == CTC_EVENT_TIMER) | |
1040 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), | |
1041 | saveflags); | |
1042 | if (rc != 0) { | |
1043 | fsm_deltimer(&ch->timer); | |
1044 | ctcm_ccw_check_rc(ch, rc, "TX in chx_txretry"); | |
1045 | ctcm_purge_skb_queue(&ch->io_queue); | |
1046 | } | |
1047 | } | |
1048 | done: | |
1049 | return; | |
1050 | } | |
1051 | ||
1052 | /** | |
1053 | * Handle fatal errors during an I/O command. | |
1054 | * | |
1055 | * fi An instance of a channel statemachine. | |
1056 | * event The event, just happened. | |
1057 | * arg Generic pointer, casted from channel * upon call. | |
1058 | */ | |
1059 | static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg) | |
1060 | { | |
1061 | struct channel *ch = arg; | |
1062 | struct net_device *dev = ch->netdev; | |
1063 | struct ctcm_priv *priv = dev->priv; | |
1064 | ||
1065 | CTCM_DBF_TEXT(TRACE, 3, __FUNCTION__); | |
1066 | fsm_deltimer(&ch->timer); | |
1067 | ctcm_pr_warn("%s %s : unrecoverable channel error\n", | |
1068 | CTC_DRIVER_NAME, dev->name); | |
1069 | if (IS_MPC(ch)) { | |
1070 | priv->stats.tx_dropped++; | |
1071 | priv->stats.tx_errors++; | |
1072 | } | |
1073 | ||
1074 | if (CHANNEL_DIRECTION(ch->flags) == READ) { | |
1075 | ctcm_pr_debug("%s: RX I/O error\n", dev->name); | |
1076 | fsm_newstate(fi, CTC_STATE_RXERR); | |
1077 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
1078 | } else { | |
1079 | ctcm_pr_debug("%s: TX I/O error\n", dev->name); | |
1080 | fsm_newstate(fi, CTC_STATE_TXERR); | |
1081 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | /* | |
1086 | * The ctcm statemachine for a channel. | |
1087 | */ | |
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 }, | |
1093 | ||
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 }, | |
1099 | ||
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 }, | |
1106 | ||
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 }, | |
1111 | ||
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 }, | |
1120 | ||
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 }, | |
1131 | ||
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 }, | |
1139 | ||
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 }, | |
1148 | ||
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 }, | |
1156 | ||
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 }, | |
1163 | ||
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 }, | |
1170 | ||
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 }, | |
1179 | ||
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 }, | |
1184 | }; | |
1185 | ||
1186 | int ch_fsm_len = ARRAY_SIZE(ch_fsm); | |
1187 | ||
1188 | /* | |
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. | |
1195 | */ | |
1196 | ||
1197 | /* | |
1198 | * Actions for mpc channel statemachine. | |
1199 | */ | |
1200 | ||
1201 | /** | |
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. | |
1205 | * | |
1206 | * fi An instance of a channel statemachine. | |
1207 | * event The event, just happened. | |
1208 | * arg Generic pointer, casted from channel * upon call. | |
1209 | */ | |
1210 | static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg) | |
1211 | { | |
1212 | struct channel *ch = arg; | |
1213 | struct net_device *dev = ch->netdev; | |
1214 | struct ctcm_priv *priv = dev->priv; | |
1215 | struct mpc_group *grp = priv->mpcg; | |
1216 | struct sk_buff *skb; | |
1217 | int first = 1; | |
1218 | int i; | |
1219 | struct timespec done_stamp; | |
1220 | __u32 data_space; | |
1221 | unsigned long duration; | |
1222 | struct sk_buff *peekskb; | |
1223 | int rc; | |
1224 | struct th_header *header; | |
1225 | struct pdu *p_header; | |
1226 | ||
1227 | if (do_debug) | |
1228 | ctcm_pr_debug("%s cp:%i enter: %s()\n", | |
1229 | dev->name, smp_processor_id(), __FUNCTION__); | |
1230 | ||
1231 | done_stamp = current_kernel_time(); /* xtime */ | |
1232 | duration = (done_stamp.tv_sec - ch->prof.send_stamp.tv_sec) * 1000000 | |
1233 | + (done_stamp.tv_nsec - ch->prof.send_stamp.tv_nsec) / 1000; | |
1234 | if (duration > ch->prof.tx_time) | |
1235 | ch->prof.tx_time = duration; | |
1236 | ||
23d805b6 | 1237 | if (ch->irb->scsw.cmd.count != 0) |
293d984f | 1238 | ctcm_pr_debug("%s: TX not complete, remaining %d bytes\n", |
23d805b6 | 1239 | dev->name, ch->irb->scsw.cmd.count); |
293d984f PT |
1240 | fsm_deltimer(&ch->timer); |
1241 | while ((skb = skb_dequeue(&ch->io_queue))) { | |
1242 | priv->stats.tx_packets++; | |
1243 | priv->stats.tx_bytes += skb->len - TH_HEADER_LENGTH; | |
1244 | if (first) { | |
1245 | priv->stats.tx_bytes += 2; | |
1246 | first = 0; | |
1247 | } | |
1248 | atomic_dec(&skb->users); | |
1249 | dev_kfree_skb_irq(skb); | |
1250 | } | |
1251 | spin_lock(&ch->collect_lock); | |
1252 | clear_normalized_cda(&ch->ccw[4]); | |
1253 | ||
1254 | if ((ch->collect_len <= 0) || (grp->in_sweep != 0)) { | |
1255 | spin_unlock(&ch->collect_lock); | |
1256 | fsm_newstate(fi, CTC_STATE_TXIDLE); | |
1257 | goto done; | |
1258 | } | |
1259 | ||
1260 | if (ctcm_checkalloc_buffer(ch)) { | |
1261 | spin_unlock(&ch->collect_lock); | |
1262 | goto done; | |
1263 | } | |
1264 | ch->trans_skb->data = ch->trans_skb_data; | |
1265 | skb_reset_tail_pointer(ch->trans_skb); | |
1266 | ch->trans_skb->len = 0; | |
1267 | if (ch->prof.maxmulti < (ch->collect_len + TH_HEADER_LENGTH)) | |
1268 | ch->prof.maxmulti = ch->collect_len + TH_HEADER_LENGTH; | |
1269 | if (ch->prof.maxcqueue < skb_queue_len(&ch->collect_queue)) | |
1270 | ch->prof.maxcqueue = skb_queue_len(&ch->collect_queue); | |
1271 | i = 0; | |
1272 | ||
1273 | if (do_debug_data) | |
1274 | ctcm_pr_debug("ctcmpc: %s() building " | |
1275 | "trans_skb from collect_q \n", __FUNCTION__); | |
1276 | ||
1277 | data_space = grp->group_max_buflen - TH_HEADER_LENGTH; | |
1278 | ||
1279 | if (do_debug_data) | |
1280 | ctcm_pr_debug("ctcmpc: %s() building trans_skb from collect_q" | |
1281 | " data_space:%04x\n", __FUNCTION__, data_space); | |
1282 | p_header = NULL; | |
1283 | while ((skb = skb_dequeue(&ch->collect_queue))) { | |
1284 | memcpy(skb_put(ch->trans_skb, skb->len), skb->data, skb->len); | |
1285 | p_header = (struct pdu *) | |
1286 | (skb_tail_pointer(ch->trans_skb) - skb->len); | |
1287 | p_header->pdu_flag = 0x00; | |
1288 | if (skb->protocol == ntohs(ETH_P_SNAP)) | |
1289 | p_header->pdu_flag |= 0x60; | |
1290 | else | |
1291 | p_header->pdu_flag |= 0x20; | |
1292 | ||
1293 | if (do_debug_data) { | |
1294 | ctcm_pr_debug("ctcmpc: %s()trans_skb len:%04x \n", | |
1295 | __FUNCTION__, ch->trans_skb->len); | |
1296 | ctcm_pr_debug("ctcmpc: %s() pdu header and data" | |
1297 | " for up to 32 bytes sent to vtam\n", | |
1298 | __FUNCTION__); | |
1299 | ctcmpc_dumpit((char *)p_header, | |
1300 | min_t(int, skb->len, 32)); | |
1301 | } | |
1302 | ch->collect_len -= skb->len; | |
1303 | data_space -= skb->len; | |
1304 | priv->stats.tx_packets++; | |
1305 | priv->stats.tx_bytes += skb->len; | |
1306 | atomic_dec(&skb->users); | |
1307 | dev_kfree_skb_any(skb); | |
1308 | peekskb = skb_peek(&ch->collect_queue); | |
1309 | if (peekskb->len > data_space) | |
1310 | break; | |
1311 | i++; | |
1312 | } | |
1313 | /* p_header points to the last one we handled */ | |
1314 | if (p_header) | |
1315 | p_header->pdu_flag |= PDU_LAST; /*Say it's the last one*/ | |
1316 | header = kzalloc(TH_HEADER_LENGTH, gfp_type()); | |
1317 | ||
1318 | if (!header) { | |
1319 | printk(KERN_WARNING "ctcmpc: OUT OF MEMORY IN %s()" | |
1320 | ": Data Lost \n", __FUNCTION__); | |
1321 | spin_unlock(&ch->collect_lock); | |
1322 | fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev); | |
1323 | goto done; | |
1324 | } | |
1325 | ||
1326 | header->th_ch_flag = TH_HAS_PDU; /* Normal data */ | |
1327 | ch->th_seq_num++; | |
1328 | header->th_seq_num = ch->th_seq_num; | |
1329 | ||
1330 | if (do_debug_data) | |
1331 | ctcm_pr_debug("%s: ToVTAM_th_seq= %08x\n" , | |
1332 | __FUNCTION__, ch->th_seq_num); | |
1333 | ||
1334 | memcpy(skb_push(ch->trans_skb, TH_HEADER_LENGTH), header, | |
1335 | TH_HEADER_LENGTH); /* put the TH on the packet */ | |
1336 | ||
1337 | kfree(header); | |
1338 | ||
1339 | if (do_debug_data) { | |
1340 | ctcm_pr_debug("ctcmpc: %s()trans_skb len:%04x \n", | |
1341 | __FUNCTION__, ch->trans_skb->len); | |
1342 | ||
1343 | ctcm_pr_debug("ctcmpc: %s() up-to-50 bytes of trans_skb " | |
1344 | "data to vtam from collect_q\n", __FUNCTION__); | |
1345 | ctcmpc_dumpit((char *)ch->trans_skb->data, | |
1346 | min_t(int, ch->trans_skb->len, 50)); | |
1347 | } | |
1348 | ||
1349 | spin_unlock(&ch->collect_lock); | |
1350 | clear_normalized_cda(&ch->ccw[1]); | |
1351 | if (set_normalized_cda(&ch->ccw[1], ch->trans_skb->data)) { | |
1352 | dev_kfree_skb_any(ch->trans_skb); | |
1353 | ch->trans_skb = NULL; | |
1354 | printk(KERN_WARNING | |
1355 | "ctcmpc: %s()CCW failure - data lost\n", | |
1356 | __FUNCTION__); | |
1357 | fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev); | |
1358 | return; | |
1359 | } | |
1360 | ch->ccw[1].count = ch->trans_skb->len; | |
1361 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
1362 | ch->prof.send_stamp = current_kernel_time(); /* xtime */ | |
1363 | if (do_debug_ccw) | |
1364 | ctcmpc_dumpit((char *)&ch->ccw[0], sizeof(struct ccw1) * 3); | |
1365 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
1366 | (unsigned long)ch, 0xff, 0); | |
1367 | ch->prof.doios_multi++; | |
1368 | if (rc != 0) { | |
1369 | priv->stats.tx_dropped += i; | |
1370 | priv->stats.tx_errors += i; | |
1371 | fsm_deltimer(&ch->timer); | |
1372 | ctcm_ccw_check_rc(ch, rc, "chained TX"); | |
1373 | } | |
1374 | done: | |
1375 | ctcm_clear_busy(dev); | |
1376 | ctcm_pr_debug("ctcmpc exit: %s %s()\n", dev->name, __FUNCTION__); | |
1377 | return; | |
1378 | } | |
1379 | ||
1380 | /** | |
1381 | * Got normal data, check for sanity, queue it up, allocate new buffer | |
1382 | * trigger bottom half, and initiate next read. | |
1383 | * | |
1384 | * fi An instance of a channel statemachine. | |
1385 | * event The event, just happened. | |
1386 | * arg Generic pointer, casted from channel * upon call. | |
1387 | */ | |
1388 | static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg) | |
1389 | { | |
1390 | struct channel *ch = arg; | |
1391 | struct net_device *dev = ch->netdev; | |
1392 | struct ctcm_priv *priv = dev->priv; | |
1393 | struct mpc_group *grp = priv->mpcg; | |
1394 | struct sk_buff *skb = ch->trans_skb; | |
1395 | struct sk_buff *new_skb; | |
1396 | unsigned long saveflags = 0; /* avoids compiler warning */ | |
23d805b6 | 1397 | int len = ch->max_bufsize - ch->irb->scsw.cmd.count; |
293d984f PT |
1398 | |
1399 | if (do_debug_data) { | |
1400 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, "mpc_ch_rx %s cp:%i %s\n", | |
1401 | dev->name, smp_processor_id(), ch->id); | |
1402 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, "mpc_ch_rx: maxbuf: %04x " | |
1403 | "len: %04x\n", ch->max_bufsize, len); | |
1404 | } | |
1405 | fsm_deltimer(&ch->timer); | |
1406 | ||
1407 | if (skb == NULL) { | |
1408 | ctcm_pr_debug("ctcmpc exit: %s() TRANS_SKB = NULL \n", | |
1409 | __FUNCTION__); | |
1410 | goto again; | |
1411 | } | |
1412 | ||
1413 | if (len < TH_HEADER_LENGTH) { | |
1414 | ctcm_pr_info("%s: got packet with invalid length %d\n", | |
1415 | dev->name, len); | |
1416 | priv->stats.rx_dropped++; | |
1417 | priv->stats.rx_length_errors++; | |
1418 | } else { | |
1419 | /* must have valid th header or game over */ | |
1420 | __u32 block_len = len; | |
1421 | len = TH_HEADER_LENGTH + XID2_LENGTH + 4; | |
1422 | new_skb = __dev_alloc_skb(ch->max_bufsize, GFP_ATOMIC); | |
1423 | ||
1424 | if (new_skb == NULL) { | |
1425 | printk(KERN_INFO "ctcmpc:%s() NEW_SKB = NULL\n", | |
1426 | __FUNCTION__); | |
1427 | printk(KERN_WARNING "ctcmpc: %s() MEMORY ALLOC FAILED" | |
1428 | " - DATA LOST - MPC FAILED\n", | |
1429 | __FUNCTION__); | |
1430 | fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev); | |
1431 | goto again; | |
1432 | } | |
1433 | switch (fsm_getstate(grp->fsm)) { | |
1434 | case MPCG_STATE_RESET: | |
1435 | case MPCG_STATE_INOP: | |
1436 | dev_kfree_skb_any(new_skb); | |
1437 | break; | |
1438 | case MPCG_STATE_FLOWC: | |
1439 | case MPCG_STATE_READY: | |
1440 | memcpy(skb_put(new_skb, block_len), | |
1441 | skb->data, block_len); | |
1442 | skb_queue_tail(&ch->io_queue, new_skb); | |
1443 | tasklet_schedule(&ch->ch_tasklet); | |
1444 | break; | |
1445 | default: | |
1446 | memcpy(skb_put(new_skb, len), skb->data, len); | |
1447 | skb_queue_tail(&ch->io_queue, new_skb); | |
1448 | tasklet_hi_schedule(&ch->ch_tasklet); | |
1449 | break; | |
1450 | } | |
1451 | } | |
1452 | ||
1453 | again: | |
1454 | switch (fsm_getstate(grp->fsm)) { | |
1455 | int rc, dolock; | |
1456 | case MPCG_STATE_FLOWC: | |
1457 | case MPCG_STATE_READY: | |
1458 | if (ctcm_checkalloc_buffer(ch)) | |
1459 | break; | |
1460 | ch->trans_skb->data = ch->trans_skb_data; | |
1461 | skb_reset_tail_pointer(ch->trans_skb); | |
1462 | ch->trans_skb->len = 0; | |
1463 | ch->ccw[1].count = ch->max_bufsize; | |
1464 | if (do_debug_ccw) | |
1465 | ctcmpc_dumpit((char *)&ch->ccw[0], | |
1466 | sizeof(struct ccw1) * 3); | |
1467 | dolock = !in_irq(); | |
1468 | if (dolock) | |
1469 | spin_lock_irqsave( | |
1470 | get_ccwdev_lock(ch->cdev), saveflags); | |
1471 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
1472 | (unsigned long)ch, 0xff, 0); | |
1473 | if (dolock) /* see remark about conditional locking */ | |
1474 | spin_unlock_irqrestore( | |
1475 | get_ccwdev_lock(ch->cdev), saveflags); | |
1476 | if (rc != 0) | |
1477 | ctcm_ccw_check_rc(ch, rc, "normal RX"); | |
1478 | default: | |
1479 | break; | |
1480 | } | |
1481 | ||
1482 | if (do_debug) | |
1483 | ctcm_pr_debug("ctcmpc exit : %s %s(): ch=0x%p id=%s\n", | |
1484 | dev->name, __FUNCTION__, ch, ch->id); | |
1485 | ||
1486 | } | |
1487 | ||
1488 | /** | |
1489 | * Initialize connection by sending a __u16 of value 0. | |
1490 | * | |
1491 | * fi An instance of a channel statemachine. | |
1492 | * event The event, just happened. | |
1493 | * arg Generic pointer, casted from channel * upon call. | |
1494 | */ | |
1495 | static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg) | |
1496 | { | |
1497 | struct channel *ch = arg; | |
1498 | struct net_device *dev = ch->netdev; | |
1499 | struct ctcm_priv *priv = dev->priv; | |
1500 | ||
1501 | if (do_debug) { | |
1502 | struct mpc_group *gptr = priv->mpcg; | |
1503 | ctcm_pr_debug("ctcmpc enter: %s(): ch=0x%p id=%s\n", | |
1504 | __FUNCTION__, ch, ch->id); | |
1505 | ctcm_pr_debug("%s() %s chstate:%i grpstate:%i chprotocol:%i\n", | |
1506 | __FUNCTION__, ch->id, fsm_getstate(fi), | |
1507 | fsm_getstate(gptr->fsm), ch->protocol); | |
1508 | } | |
1509 | if (fsm_getstate(fi) == CTC_STATE_TXIDLE) | |
1510 | MPC_DBF_DEV_NAME(TRACE, dev, "remote side issued READ? "); | |
1511 | ||
1512 | fsm_deltimer(&ch->timer); | |
1513 | if (ctcm_checkalloc_buffer(ch)) | |
1514 | goto done; | |
1515 | ||
1516 | switch (fsm_getstate(fi)) { | |
1517 | case CTC_STATE_STARTRETRY: | |
1518 | case CTC_STATE_SETUPWAIT: | |
1519 | if (CHANNEL_DIRECTION(ch->flags) == READ) { | |
1520 | ctcmpc_chx_rxidle(fi, event, arg); | |
1521 | } else { | |
1522 | fsm_newstate(fi, CTC_STATE_TXIDLE); | |
1523 | fsm_event(priv->fsm, DEV_EVENT_TXUP, dev); | |
1524 | } | |
1525 | goto done; | |
1526 | default: | |
1527 | break; | |
1528 | }; | |
1529 | ||
1530 | fsm_newstate(fi, (CHANNEL_DIRECTION(ch->flags) == READ) | |
1531 | ? CTC_STATE_RXINIT : CTC_STATE_TXINIT); | |
1532 | ||
1533 | done: | |
1534 | if (do_debug) | |
1535 | ctcm_pr_debug("ctcmpc exit : %s(): ch=0x%p id=%s\n", | |
1536 | __FUNCTION__, ch, ch->id); | |
1537 | return; | |
1538 | } | |
1539 | ||
1540 | /** | |
1541 | * Got initial data, check it. If OK, | |
1542 | * notify device statemachine that we are up and | |
1543 | * running. | |
1544 | * | |
1545 | * fi An instance of a channel statemachine. | |
1546 | * event The event, just happened. | |
1547 | * arg Generic pointer, casted from channel * upon call. | |
1548 | */ | |
1549 | void ctcmpc_chx_rxidle(fsm_instance *fi, int event, void *arg) | |
1550 | { | |
1551 | struct channel *ch = arg; | |
1552 | struct net_device *dev = ch->netdev; | |
1553 | struct ctcm_priv *priv = dev->priv; | |
1554 | struct mpc_group *grp = priv->mpcg; | |
1555 | int rc; | |
1556 | unsigned long saveflags = 0; /* avoids compiler warning */ | |
1557 | ||
1558 | fsm_deltimer(&ch->timer); | |
1559 | ctcm_pr_debug("%s cp:%i enter: %s()\n", | |
1560 | dev->name, smp_processor_id(), __FUNCTION__); | |
1561 | if (do_debug) | |
1562 | ctcm_pr_debug("%s() %s chstate:%i grpstate:%i\n", | |
1563 | __FUNCTION__, ch->id, | |
1564 | fsm_getstate(fi), fsm_getstate(grp->fsm)); | |
1565 | ||
1566 | fsm_newstate(fi, CTC_STATE_RXIDLE); | |
1567 | /* XID processing complete */ | |
1568 | ||
1569 | switch (fsm_getstate(grp->fsm)) { | |
1570 | case MPCG_STATE_FLOWC: | |
1571 | case MPCG_STATE_READY: | |
1572 | if (ctcm_checkalloc_buffer(ch)) | |
1573 | goto done; | |
1574 | ch->trans_skb->data = ch->trans_skb_data; | |
1575 | skb_reset_tail_pointer(ch->trans_skb); | |
1576 | ch->trans_skb->len = 0; | |
1577 | ch->ccw[1].count = ch->max_bufsize; | |
1578 | if (do_debug_ccw) | |
1579 | ctcmpc_dumpit((char *)&ch->ccw[0], | |
1580 | sizeof(struct ccw1) * 3); | |
1581 | if (event == CTC_EVENT_START) | |
1582 | /* see remark about conditional locking */ | |
1583 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
1584 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
1585 | (unsigned long)ch, 0xff, 0); | |
1586 | if (event == CTC_EVENT_START) | |
1587 | spin_unlock_irqrestore( | |
1588 | get_ccwdev_lock(ch->cdev), saveflags); | |
1589 | if (rc != 0) { | |
1590 | fsm_newstate(fi, CTC_STATE_RXINIT); | |
1591 | ctcm_ccw_check_rc(ch, rc, "initial RX"); | |
1592 | goto done; | |
1593 | } | |
1594 | break; | |
1595 | default: | |
1596 | break; | |
1597 | } | |
1598 | ||
1599 | fsm_event(priv->fsm, DEV_EVENT_RXUP, dev); | |
1600 | done: | |
1601 | if (do_debug) | |
1602 | ctcm_pr_debug("ctcmpc exit: %s %s()\n", | |
1603 | dev->name, __FUNCTION__); | |
1604 | return; | |
1605 | } | |
1606 | ||
1607 | /* | |
1608 | * ctcmpc channel FSM action | |
1609 | * called from several points in ctcmpc_ch_fsm | |
1610 | * ctcmpc only | |
1611 | */ | |
1612 | static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg) | |
1613 | { | |
1614 | struct channel *ch = arg; | |
1615 | struct net_device *dev = ch->netdev; | |
1616 | struct ctcm_priv *priv = dev->priv; | |
1617 | struct mpc_group *grp = priv->mpcg; | |
1618 | ||
1619 | if (do_debug) { | |
1620 | ctcm_pr_debug("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s" | |
1621 | "GrpState:%s ChState:%s\n", | |
1622 | __FUNCTION__, smp_processor_id(), ch, ch->id, | |
1623 | fsm_getstate_str(grp->fsm), | |
1624 | fsm_getstate_str(ch->fsm)); | |
1625 | } | |
1626 | ||
1627 | switch (fsm_getstate(grp->fsm)) { | |
1628 | case MPCG_STATE_XID2INITW: | |
1629 | /* ok..start yside xid exchanges */ | |
1630 | if (!ch->in_mpcgroup) | |
1631 | break; | |
1632 | if (fsm_getstate(ch->fsm) == CH_XID0_PENDING) { | |
1633 | fsm_deltimer(&grp->timer); | |
1634 | fsm_addtimer(&grp->timer, | |
1635 | MPC_XID_TIMEOUT_VALUE, | |
1636 | MPCG_EVENT_TIMER, dev); | |
1637 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch); | |
1638 | ||
1639 | } else if (fsm_getstate(ch->fsm) < CH_XID7_PENDING1) | |
1640 | /* attn rcvd before xid0 processed via bh */ | |
1641 | fsm_newstate(ch->fsm, CH_XID7_PENDING1); | |
1642 | break; | |
1643 | case MPCG_STATE_XID2INITX: | |
1644 | case MPCG_STATE_XID0IOWAIT: | |
1645 | case MPCG_STATE_XID0IOWAIX: | |
1646 | /* attn rcvd before xid0 processed on ch | |
1647 | but mid-xid0 processing for group */ | |
1648 | if (fsm_getstate(ch->fsm) < CH_XID7_PENDING1) | |
1649 | fsm_newstate(ch->fsm, CH_XID7_PENDING1); | |
1650 | break; | |
1651 | case MPCG_STATE_XID7INITW: | |
1652 | case MPCG_STATE_XID7INITX: | |
1653 | case MPCG_STATE_XID7INITI: | |
1654 | case MPCG_STATE_XID7INITZ: | |
1655 | switch (fsm_getstate(ch->fsm)) { | |
1656 | case CH_XID7_PENDING: | |
1657 | fsm_newstate(ch->fsm, CH_XID7_PENDING1); | |
1658 | break; | |
1659 | case CH_XID7_PENDING2: | |
1660 | fsm_newstate(ch->fsm, CH_XID7_PENDING3); | |
1661 | break; | |
1662 | } | |
1663 | fsm_event(grp->fsm, MPCG_EVENT_XID7DONE, dev); | |
1664 | break; | |
1665 | } | |
1666 | ||
1667 | if (do_debug) | |
1668 | ctcm_pr_debug("ctcmpc exit : %s(): cp=%i ch=0x%p id=%s\n", | |
1669 | __FUNCTION__, smp_processor_id(), ch, ch->id); | |
1670 | return; | |
1671 | ||
1672 | } | |
1673 | ||
1674 | /* | |
1675 | * ctcmpc channel FSM action | |
1676 | * called from one point in ctcmpc_ch_fsm | |
1677 | * ctcmpc only | |
1678 | */ | |
1679 | static void ctcmpc_chx_attnbusy(fsm_instance *fsm, int event, void *arg) | |
1680 | { | |
1681 | struct channel *ch = arg; | |
1682 | struct net_device *dev = ch->netdev; | |
1683 | struct ctcm_priv *priv = dev->priv; | |
1684 | struct mpc_group *grp = priv->mpcg; | |
1685 | ||
1686 | ctcm_pr_debug("ctcmpc enter: %s %s() %s \nGrpState:%s ChState:%s\n", | |
1687 | dev->name, | |
1688 | __FUNCTION__, ch->id, | |
1689 | fsm_getstate_str(grp->fsm), | |
1690 | fsm_getstate_str(ch->fsm)); | |
1691 | ||
1692 | fsm_deltimer(&ch->timer); | |
1693 | ||
1694 | switch (fsm_getstate(grp->fsm)) { | |
1695 | case MPCG_STATE_XID0IOWAIT: | |
1696 | /* vtam wants to be primary.start yside xid exchanges*/ | |
1697 | /* only receive one attn-busy at a time so must not */ | |
1698 | /* change state each time */ | |
1699 | grp->changed_side = 1; | |
1700 | fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW); | |
1701 | break; | |
1702 | case MPCG_STATE_XID2INITW: | |
1703 | if (grp->changed_side == 1) { | |
1704 | grp->changed_side = 2; | |
1705 | break; | |
1706 | } | |
1707 | /* process began via call to establish_conn */ | |
1708 | /* so must report failure instead of reverting */ | |
1709 | /* back to ready-for-xid passive state */ | |
1710 | if (grp->estconnfunc) | |
1711 | goto done; | |
1712 | /* this attnbusy is NOT the result of xside xid */ | |
1713 | /* collisions so yside must have been triggered */ | |
1714 | /* by an ATTN that was not intended to start XID */ | |
1715 | /* processing. Revert back to ready-for-xid and */ | |
1716 | /* wait for ATTN interrupt to signal xid start */ | |
1717 | if (fsm_getstate(ch->fsm) == CH_XID0_INPROGRESS) { | |
1718 | fsm_newstate(ch->fsm, CH_XID0_PENDING) ; | |
1719 | fsm_deltimer(&grp->timer); | |
1720 | goto done; | |
1721 | } | |
1722 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1723 | goto done; | |
1724 | case MPCG_STATE_XID2INITX: | |
1725 | /* XID2 was received before ATTN Busy for second | |
1726 | channel.Send yside xid for second channel. | |
1727 | */ | |
1728 | if (grp->changed_side == 1) { | |
1729 | grp->changed_side = 2; | |
1730 | break; | |
1731 | } | |
1732 | case MPCG_STATE_XID0IOWAIX: | |
1733 | case MPCG_STATE_XID7INITW: | |
1734 | case MPCG_STATE_XID7INITX: | |
1735 | case MPCG_STATE_XID7INITI: | |
1736 | case MPCG_STATE_XID7INITZ: | |
1737 | default: | |
1738 | /* multiple attn-busy indicates too out-of-sync */ | |
1739 | /* and they are certainly not being received as part */ | |
1740 | /* of valid mpc group negotiations.. */ | |
1741 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1742 | goto done; | |
1743 | } | |
1744 | ||
1745 | if (grp->changed_side == 1) { | |
1746 | fsm_deltimer(&grp->timer); | |
1747 | fsm_addtimer(&grp->timer, MPC_XID_TIMEOUT_VALUE, | |
1748 | MPCG_EVENT_TIMER, dev); | |
1749 | } | |
1750 | if (ch->in_mpcgroup) | |
1751 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch); | |
1752 | else | |
1753 | printk(KERN_WARNING "ctcmpc: %s() Not all channels have" | |
1754 | " been added to group\n", __FUNCTION__); | |
1755 | ||
1756 | done: | |
1757 | if (do_debug) | |
1758 | ctcm_pr_debug("ctcmpc exit : %s()%s ch=0x%p id=%s\n", | |
1759 | __FUNCTION__, dev->name, ch, ch->id); | |
1760 | ||
1761 | return; | |
1762 | ||
1763 | } | |
1764 | ||
1765 | /* | |
1766 | * ctcmpc channel FSM action | |
1767 | * called from several points in ctcmpc_ch_fsm | |
1768 | * ctcmpc only | |
1769 | */ | |
1770 | static void ctcmpc_chx_resend(fsm_instance *fsm, int event, void *arg) | |
1771 | { | |
1772 | struct channel *ch = arg; | |
1773 | struct net_device *dev = ch->netdev; | |
1774 | struct ctcm_priv *priv = dev->priv; | |
1775 | struct mpc_group *grp = priv->mpcg; | |
1776 | ||
1777 | ctcm_pr_debug("ctcmpc enter: %s %s() %s \nGrpState:%s ChState:%s\n", | |
1778 | dev->name, __FUNCTION__, ch->id, | |
1779 | fsm_getstate_str(grp->fsm), | |
1780 | fsm_getstate_str(ch->fsm)); | |
1781 | ||
1782 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch); | |
1783 | ||
1784 | return; | |
1785 | } | |
1786 | ||
1787 | /* | |
1788 | * ctcmpc channel FSM action | |
1789 | * called from several points in ctcmpc_ch_fsm | |
1790 | * ctcmpc only | |
1791 | */ | |
1792 | static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg) | |
1793 | { | |
1794 | struct channel *ach = arg; | |
1795 | struct net_device *dev = ach->netdev; | |
1796 | struct ctcm_priv *priv = dev->priv; | |
1797 | struct mpc_group *grp = priv->mpcg; | |
1798 | struct channel *wch = priv->channel[WRITE]; | |
1799 | struct channel *rch = priv->channel[READ]; | |
1800 | struct sk_buff *skb; | |
1801 | struct th_sweep *header; | |
1802 | int rc = 0; | |
1803 | unsigned long saveflags = 0; | |
1804 | ||
1805 | if (do_debug) | |
1806 | ctcm_pr_debug("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s\n", | |
1807 | __FUNCTION__, smp_processor_id(), ach, ach->id); | |
1808 | ||
1809 | if (grp->in_sweep == 0) | |
1810 | goto done; | |
1811 | ||
1812 | if (do_debug_data) { | |
1813 | ctcm_pr_debug("ctcmpc: %s() 1: ToVTAM_th_seq= %08x\n" , | |
1814 | __FUNCTION__, wch->th_seq_num); | |
1815 | ctcm_pr_debug("ctcmpc: %s() 1: FromVTAM_th_seq= %08x\n" , | |
1816 | __FUNCTION__, rch->th_seq_num); | |
1817 | } | |
1818 | ||
1819 | if (fsm_getstate(wch->fsm) != CTC_STATE_TXIDLE) { | |
1820 | /* give the previous IO time to complete */ | |
1821 | fsm_addtimer(&wch->sweep_timer, | |
1822 | 200, CTC_EVENT_RSWEEP_TIMER, wch); | |
1823 | goto done; | |
1824 | } | |
1825 | ||
1826 | skb = skb_dequeue(&wch->sweep_queue); | |
1827 | if (!skb) | |
1828 | goto done; | |
1829 | ||
1830 | if (set_normalized_cda(&wch->ccw[4], skb->data)) { | |
1831 | grp->in_sweep = 0; | |
1832 | ctcm_clear_busy_do(dev); | |
1833 | dev_kfree_skb_any(skb); | |
1834 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1835 | goto done; | |
1836 | } else { | |
1837 | atomic_inc(&skb->users); | |
1838 | skb_queue_tail(&wch->io_queue, skb); | |
1839 | } | |
1840 | ||
1841 | /* send out the sweep */ | |
1842 | wch->ccw[4].count = skb->len; | |
1843 | ||
1844 | header = (struct th_sweep *)skb->data; | |
1845 | switch (header->th.th_ch_flag) { | |
1846 | case TH_SWEEP_REQ: | |
1847 | grp->sweep_req_pend_num--; | |
1848 | break; | |
1849 | case TH_SWEEP_RESP: | |
1850 | grp->sweep_rsp_pend_num--; | |
1851 | break; | |
1852 | } | |
1853 | ||
1854 | header->sw.th_last_seq = wch->th_seq_num; | |
1855 | ||
1856 | if (do_debug_ccw) | |
1857 | ctcmpc_dumpit((char *)&wch->ccw[3], sizeof(struct ccw1) * 3); | |
1858 | ||
1859 | ctcm_pr_debug("ctcmpc: %s() sweep packet\n", __FUNCTION__); | |
1860 | ctcmpc_dumpit((char *)header, TH_SWEEP_LENGTH); | |
1861 | ||
1862 | fsm_addtimer(&wch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, wch); | |
1863 | fsm_newstate(wch->fsm, CTC_STATE_TX); | |
1864 | ||
1865 | spin_lock_irqsave(get_ccwdev_lock(wch->cdev), saveflags); | |
1866 | wch->prof.send_stamp = current_kernel_time(); /* xtime */ | |
1867 | rc = ccw_device_start(wch->cdev, &wch->ccw[3], | |
1868 | (unsigned long) wch, 0xff, 0); | |
1869 | spin_unlock_irqrestore(get_ccwdev_lock(wch->cdev), saveflags); | |
1870 | ||
1871 | if ((grp->sweep_req_pend_num == 0) && | |
1872 | (grp->sweep_rsp_pend_num == 0)) { | |
1873 | grp->in_sweep = 0; | |
1874 | rch->th_seq_num = 0x00; | |
1875 | wch->th_seq_num = 0x00; | |
1876 | ctcm_clear_busy_do(dev); | |
1877 | } | |
1878 | ||
1879 | if (do_debug_data) { | |
1880 | ctcm_pr_debug("ctcmpc: %s()2: ToVTAM_th_seq= %08x\n" , | |
1881 | __FUNCTION__, wch->th_seq_num); | |
1882 | ctcm_pr_debug("ctcmpc: %s()2: FromVTAM_th_seq= %08x\n" , | |
1883 | __FUNCTION__, rch->th_seq_num); | |
1884 | } | |
1885 | ||
1886 | if (rc != 0) | |
1887 | ctcm_ccw_check_rc(wch, rc, "send sweep"); | |
1888 | ||
1889 | done: | |
1890 | if (do_debug) | |
1891 | ctcm_pr_debug("ctcmpc exit: %s() %s\n", __FUNCTION__, ach->id); | |
1892 | return; | |
1893 | } | |
1894 | ||
1895 | ||
1896 | /* | |
1897 | * The ctcmpc statemachine for a channel. | |
1898 | */ | |
1899 | ||
1900 | const fsm_node ctcmpc_ch_fsm[] = { | |
1901 | { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop }, | |
1902 | { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start }, | |
1903 | { CTC_STATE_STOPPED, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1904 | { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1905 | { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop }, | |
1906 | ||
1907 | { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop }, | |
1908 | { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop }, | |
1909 | { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1910 | { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop }, | |
1911 | { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start }, | |
1912 | { CTC_STATE_NOTOP, CTC_EVENT_UC_RCRESET, ctcm_chx_stop }, | |
1913 | { CTC_STATE_NOTOP, CTC_EVENT_UC_RSRESET, ctcm_chx_stop }, | |
1914 | { CTC_STATE_NOTOP, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1915 | ||
1916 | { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1917 | { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop }, | |
1918 | { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, | |
1919 | { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr }, | |
1920 | { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1921 | { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1922 | ||
1923 | { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1924 | { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode }, | |
1925 | { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, | |
1926 | { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1927 | { CTC_STATE_STARTRETRY, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1928 | ||
1929 | { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1930 | { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop }, | |
1931 | { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio }, | |
1932 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1933 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1934 | { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode }, | |
1935 | { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1936 | { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1937 | ||
1938 | { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1939 | { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop }, | |
1940 | { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, ctcmpc_chx_rxidle }, | |
1941 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr }, | |
1942 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr }, | |
1943 | { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr }, | |
1944 | { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail }, | |
1945 | { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1946 | { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, ctcmpc_chx_firstio }, | |
1947 | { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1948 | ||
1949 | { CH_XID0_PENDING, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1950 | { CH_XID0_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1951 | { CH_XID0_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1952 | { CH_XID0_PENDING, CTC_EVENT_START, ctcm_action_nop }, | |
1953 | { CH_XID0_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1954 | { CH_XID0_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1955 | { CH_XID0_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1956 | { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1957 | { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1958 | { CH_XID0_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1959 | ||
1960 | { CH_XID0_INPROGRESS, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1961 | { CH_XID0_INPROGRESS, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1962 | { CH_XID0_INPROGRESS, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1963 | { CH_XID0_INPROGRESS, CTC_EVENT_START, ctcm_action_nop }, | |
1964 | { CH_XID0_INPROGRESS, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1965 | { CH_XID0_INPROGRESS, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1966 | { CH_XID0_INPROGRESS, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1967 | { CH_XID0_INPROGRESS, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1968 | { CH_XID0_INPROGRESS, CTC_EVENT_ATTNBUSY, ctcmpc_chx_attnbusy }, | |
1969 | { CH_XID0_INPROGRESS, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1970 | { CH_XID0_INPROGRESS, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1971 | ||
1972 | { CH_XID7_PENDING, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1973 | { CH_XID7_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1974 | { CH_XID7_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1975 | { CH_XID7_PENDING, CTC_EVENT_START, ctcm_action_nop }, | |
1976 | { CH_XID7_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1977 | { CH_XID7_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1978 | { CH_XID7_PENDING, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1979 | { CH_XID7_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1980 | { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1981 | { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1982 | { CH_XID7_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1983 | { CH_XID7_PENDING, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1984 | { CH_XID7_PENDING, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1985 | ||
1986 | { CH_XID7_PENDING1, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1987 | { CH_XID7_PENDING1, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1988 | { CH_XID7_PENDING1, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1989 | { CH_XID7_PENDING1, CTC_EVENT_START, ctcm_action_nop }, | |
1990 | { CH_XID7_PENDING1, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1991 | { CH_XID7_PENDING1, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1992 | { CH_XID7_PENDING1, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1993 | { CH_XID7_PENDING1, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1994 | { CH_XID7_PENDING1, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1995 | { CH_XID7_PENDING1, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1996 | { CH_XID7_PENDING1, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1997 | { CH_XID7_PENDING1, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1998 | ||
1999 | { CH_XID7_PENDING2, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
2000 | { CH_XID7_PENDING2, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
2001 | { CH_XID7_PENDING2, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2002 | { CH_XID7_PENDING2, CTC_EVENT_START, ctcm_action_nop }, | |
2003 | { CH_XID7_PENDING2, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2004 | { CH_XID7_PENDING2, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2005 | { CH_XID7_PENDING2, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
2006 | { CH_XID7_PENDING2, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
2007 | { CH_XID7_PENDING2, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
2008 | { CH_XID7_PENDING2, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
2009 | { CH_XID7_PENDING2, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
2010 | { CH_XID7_PENDING2, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
2011 | ||
2012 | { CH_XID7_PENDING3, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
2013 | { CH_XID7_PENDING3, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
2014 | { CH_XID7_PENDING3, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2015 | { CH_XID7_PENDING3, CTC_EVENT_START, ctcm_action_nop }, | |
2016 | { CH_XID7_PENDING3, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2017 | { CH_XID7_PENDING3, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2018 | { CH_XID7_PENDING3, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
2019 | { CH_XID7_PENDING3, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
2020 | { CH_XID7_PENDING3, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
2021 | { CH_XID7_PENDING3, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
2022 | { CH_XID7_PENDING3, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
2023 | { CH_XID7_PENDING3, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
2024 | ||
2025 | { CH_XID7_PENDING4, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
2026 | { CH_XID7_PENDING4, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
2027 | { CH_XID7_PENDING4, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2028 | { CH_XID7_PENDING4, CTC_EVENT_START, ctcm_action_nop }, | |
2029 | { CH_XID7_PENDING4, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2030 | { CH_XID7_PENDING4, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2031 | { CH_XID7_PENDING4, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
2032 | { CH_XID7_PENDING4, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
2033 | { CH_XID7_PENDING4, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
2034 | { CH_XID7_PENDING4, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
2035 | { CH_XID7_PENDING4, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
2036 | { CH_XID7_PENDING4, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
2037 | ||
2038 | { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2039 | { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop }, | |
2040 | { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
2041 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc }, | |
2042 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail }, | |
2043 | { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2044 | { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2045 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
2046 | ||
2047 | { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2048 | { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop }, | |
2049 | { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle }, | |
2050 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr }, | |
2051 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr }, | |
2052 | { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr }, | |
2053 | { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2054 | { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2055 | { CTC_STATE_TXINIT, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep }, | |
2056 | ||
2057 | { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2058 | { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop }, | |
2059 | { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio }, | |
2060 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_fail }, | |
2061 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail }, | |
2062 | { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2063 | { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2064 | { CTC_STATE_TXIDLE, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep }, | |
2065 | ||
2066 | { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop }, | |
2067 | { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart }, | |
2068 | { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped }, | |
2069 | { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, | |
2070 | { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, | |
2071 | { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2072 | { CTC_STATE_TERM, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
2073 | { CTC_STATE_TERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2074 | ||
2075 | { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2076 | { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart }, | |
2077 | { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, | |
2078 | { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, | |
2079 | { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, | |
2080 | { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2081 | { CTC_STATE_DTERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2082 | ||
2083 | { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2084 | { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop }, | |
2085 | { CTC_STATE_TX, CTC_EVENT_FINSTAT, ctcmpc_chx_txdone }, | |
2086 | { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_fail }, | |
2087 | { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_fail }, | |
2088 | { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry }, | |
2089 | { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2090 | { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2091 | { CTC_STATE_TX, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep }, | |
2092 | { CTC_STATE_TX, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
2093 | ||
2094 | { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2095 | { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2096 | { CTC_STATE_TXERR, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2097 | { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2098 | { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2099 | }; | |
2100 | ||
2101 | int mpc_ch_fsm_len = ARRAY_SIZE(ctcmpc_ch_fsm); | |
2102 | ||
2103 | /* | |
2104 | * Actions for interface - statemachine. | |
2105 | */ | |
2106 | ||
2107 | /** | |
2108 | * Startup channels by sending CTC_EVENT_START to each channel. | |
2109 | * | |
2110 | * fi An instance of an interface statemachine. | |
2111 | * event The event, just happened. | |
2112 | * arg Generic pointer, casted from struct net_device * upon call. | |
2113 | */ | |
2114 | static void dev_action_start(fsm_instance *fi, int event, void *arg) | |
2115 | { | |
2116 | struct net_device *dev = arg; | |
2117 | struct ctcm_priv *priv = dev->priv; | |
2118 | int direction; | |
2119 | ||
2120 | CTCMY_DBF_DEV_NAME(SETUP, dev, ""); | |
2121 | ||
2122 | fsm_deltimer(&priv->restart_timer); | |
2123 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX); | |
2124 | if (IS_MPC(priv)) | |
2125 | priv->mpcg->channels_terminating = 0; | |
2126 | for (direction = READ; direction <= WRITE; direction++) { | |
2127 | struct channel *ch = priv->channel[direction]; | |
2128 | fsm_event(ch->fsm, CTC_EVENT_START, ch); | |
2129 | } | |
2130 | } | |
2131 | ||
2132 | /** | |
2133 | * Shutdown channels by sending CTC_EVENT_STOP to each channel. | |
2134 | * | |
2135 | * fi An instance of an interface statemachine. | |
2136 | * event The event, just happened. | |
2137 | * arg Generic pointer, casted from struct net_device * upon call. | |
2138 | */ | |
2139 | static void dev_action_stop(fsm_instance *fi, int event, void *arg) | |
2140 | { | |
2141 | int direction; | |
2142 | struct net_device *dev = arg; | |
2143 | struct ctcm_priv *priv = dev->priv; | |
2144 | ||
2145 | CTCMY_DBF_DEV_NAME(SETUP, dev, ""); | |
2146 | ||
2147 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX); | |
2148 | for (direction = READ; direction <= WRITE; direction++) { | |
2149 | struct channel *ch = priv->channel[direction]; | |
2150 | fsm_event(ch->fsm, CTC_EVENT_STOP, ch); | |
2151 | ch->th_seq_num = 0x00; | |
2152 | if (do_debug) | |
2153 | ctcm_pr_debug("ctcm: %s() CH_th_seq= %08x\n", | |
2154 | __FUNCTION__, ch->th_seq_num); | |
2155 | } | |
2156 | if (IS_MPC(priv)) | |
2157 | fsm_newstate(priv->mpcg->fsm, MPCG_STATE_RESET); | |
2158 | } | |
2159 | ||
2160 | static void dev_action_restart(fsm_instance *fi, int event, void *arg) | |
2161 | { | |
2162 | int restart_timer; | |
2163 | struct net_device *dev = arg; | |
2164 | struct ctcm_priv *priv = dev->priv; | |
2165 | ||
2166 | CTCMY_DBF_DEV_NAME(TRACE, dev, ""); | |
2167 | ||
2168 | if (IS_MPC(priv)) { | |
2169 | ctcm_pr_info("ctcm: %s Restarting Device and " | |
2170 | "MPC Group in 5 seconds\n", | |
2171 | dev->name); | |
2172 | restart_timer = CTCM_TIME_1_SEC; | |
2173 | } else { | |
2174 | ctcm_pr_info("%s: Restarting\n", dev->name); | |
2175 | restart_timer = CTCM_TIME_5_SEC; | |
2176 | } | |
2177 | ||
2178 | dev_action_stop(fi, event, arg); | |
2179 | fsm_event(priv->fsm, DEV_EVENT_STOP, dev); | |
2180 | if (IS_MPC(priv)) | |
2181 | fsm_newstate(priv->mpcg->fsm, MPCG_STATE_RESET); | |
2182 | ||
2183 | /* going back into start sequence too quickly can */ | |
2184 | /* result in the other side becoming unreachable due */ | |
2185 | /* to sense reported when IO is aborted */ | |
2186 | fsm_addtimer(&priv->restart_timer, restart_timer, | |
2187 | DEV_EVENT_START, dev); | |
2188 | } | |
2189 | ||
2190 | /** | |
2191 | * Called from channel statemachine | |
2192 | * when a channel is up and running. | |
2193 | * | |
2194 | * fi An instance of an interface statemachine. | |
2195 | * event The event, just happened. | |
2196 | * arg Generic pointer, casted from struct net_device * upon call. | |
2197 | */ | |
2198 | static void dev_action_chup(fsm_instance *fi, int event, void *arg) | |
2199 | { | |
2200 | struct net_device *dev = arg; | |
2201 | struct ctcm_priv *priv = dev->priv; | |
2202 | ||
2203 | CTCMY_DBF_DEV_NAME(SETUP, dev, ""); | |
2204 | ||
2205 | switch (fsm_getstate(fi)) { | |
2206 | case DEV_STATE_STARTWAIT_RXTX: | |
2207 | if (event == DEV_EVENT_RXUP) | |
2208 | fsm_newstate(fi, DEV_STATE_STARTWAIT_TX); | |
2209 | else | |
2210 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RX); | |
2211 | break; | |
2212 | case DEV_STATE_STARTWAIT_RX: | |
2213 | if (event == DEV_EVENT_RXUP) { | |
2214 | fsm_newstate(fi, DEV_STATE_RUNNING); | |
2215 | ctcm_pr_info("%s: connected with remote side\n", | |
2216 | dev->name); | |
2217 | ctcm_clear_busy(dev); | |
2218 | } | |
2219 | break; | |
2220 | case DEV_STATE_STARTWAIT_TX: | |
2221 | if (event == DEV_EVENT_TXUP) { | |
2222 | fsm_newstate(fi, DEV_STATE_RUNNING); | |
2223 | ctcm_pr_info("%s: connected with remote side\n", | |
2224 | dev->name); | |
2225 | ctcm_clear_busy(dev); | |
2226 | } | |
2227 | break; | |
2228 | case DEV_STATE_STOPWAIT_TX: | |
2229 | if (event == DEV_EVENT_RXUP) | |
2230 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX); | |
2231 | break; | |
2232 | case DEV_STATE_STOPWAIT_RX: | |
2233 | if (event == DEV_EVENT_TXUP) | |
2234 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX); | |
2235 | break; | |
2236 | } | |
2237 | ||
2238 | if (IS_MPC(priv)) { | |
2239 | if (event == DEV_EVENT_RXUP) | |
2240 | mpc_channel_action(priv->channel[READ], | |
2241 | READ, MPC_CHANNEL_ADD); | |
2242 | else | |
2243 | mpc_channel_action(priv->channel[WRITE], | |
2244 | WRITE, MPC_CHANNEL_ADD); | |
2245 | } | |
2246 | } | |
2247 | ||
2248 | /** | |
2249 | * Called from device statemachine | |
2250 | * when a channel has been shutdown. | |
2251 | * | |
2252 | * fi An instance of an interface statemachine. | |
2253 | * event The event, just happened. | |
2254 | * arg Generic pointer, casted from struct net_device * upon call. | |
2255 | */ | |
2256 | static void dev_action_chdown(fsm_instance *fi, int event, void *arg) | |
2257 | { | |
2258 | ||
2259 | struct net_device *dev = arg; | |
2260 | struct ctcm_priv *priv = dev->priv; | |
2261 | ||
2262 | CTCMY_DBF_DEV_NAME(SETUP, dev, ""); | |
2263 | ||
2264 | switch (fsm_getstate(fi)) { | |
2265 | case DEV_STATE_RUNNING: | |
2266 | if (event == DEV_EVENT_TXDOWN) | |
2267 | fsm_newstate(fi, DEV_STATE_STARTWAIT_TX); | |
2268 | else | |
2269 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RX); | |
2270 | break; | |
2271 | case DEV_STATE_STARTWAIT_RX: | |
2272 | if (event == DEV_EVENT_TXDOWN) | |
2273 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX); | |
2274 | break; | |
2275 | case DEV_STATE_STARTWAIT_TX: | |
2276 | if (event == DEV_EVENT_RXDOWN) | |
2277 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX); | |
2278 | break; | |
2279 | case DEV_STATE_STOPWAIT_RXTX: | |
2280 | if (event == DEV_EVENT_TXDOWN) | |
2281 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RX); | |
2282 | else | |
2283 | fsm_newstate(fi, DEV_STATE_STOPWAIT_TX); | |
2284 | break; | |
2285 | case DEV_STATE_STOPWAIT_RX: | |
2286 | if (event == DEV_EVENT_RXDOWN) | |
2287 | fsm_newstate(fi, DEV_STATE_STOPPED); | |
2288 | break; | |
2289 | case DEV_STATE_STOPWAIT_TX: | |
2290 | if (event == DEV_EVENT_TXDOWN) | |
2291 | fsm_newstate(fi, DEV_STATE_STOPPED); | |
2292 | break; | |
2293 | } | |
2294 | if (IS_MPC(priv)) { | |
2295 | if (event == DEV_EVENT_RXDOWN) | |
2296 | mpc_channel_action(priv->channel[READ], | |
2297 | READ, MPC_CHANNEL_REMOVE); | |
2298 | else | |
2299 | mpc_channel_action(priv->channel[WRITE], | |
2300 | WRITE, MPC_CHANNEL_REMOVE); | |
2301 | } | |
2302 | } | |
2303 | ||
2304 | const fsm_node dev_fsm[] = { | |
2305 | { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start }, | |
2306 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_START, dev_action_start }, | |
2307 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2308 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2309 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart }, | |
2310 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_START, dev_action_start }, | |
2311 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXUP, dev_action_chup }, | |
2312 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_TXUP, dev_action_chup }, | |
2313 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2314 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RESTART, dev_action_restart }, | |
2315 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_START, dev_action_start }, | |
2316 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RXUP, dev_action_chup }, | |
2317 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXUP, dev_action_chup }, | |
2318 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2319 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RESTART, dev_action_restart }, | |
2320 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_STOP, dev_action_stop }, | |
2321 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXUP, dev_action_chup }, | |
2322 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXUP, dev_action_chup }, | |
2323 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2324 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2325 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart }, | |
2326 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_STOP, dev_action_stop }, | |
2327 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXUP, dev_action_chup }, | |
2328 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_TXUP, dev_action_chup }, | |
2329 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2330 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RESTART, dev_action_restart }, | |
2331 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_STOP, dev_action_stop }, | |
2332 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RXUP, dev_action_chup }, | |
2333 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXUP, dev_action_chup }, | |
2334 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2335 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RESTART, dev_action_restart }, | |
2336 | { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop }, | |
2337 | { DEV_STATE_RUNNING, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2338 | { DEV_STATE_RUNNING, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2339 | { DEV_STATE_RUNNING, DEV_EVENT_TXUP, ctcm_action_nop }, | |
2340 | { DEV_STATE_RUNNING, DEV_EVENT_RXUP, ctcm_action_nop }, | |
2341 | { DEV_STATE_RUNNING, DEV_EVENT_RESTART, dev_action_restart }, | |
2342 | }; | |
2343 | ||
2344 | int dev_fsm_len = ARRAY_SIZE(dev_fsm); | |
2345 | ||
2346 | /* --- This is the END my friend --- */ | |
2347 |