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Commit | Line | Data |
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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 | ||
2a7c6f2c PT |
16 | #define KMSG_COMPONENT "ctcm" |
17 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
18 | ||
293d984f PT |
19 | #include <linux/module.h> |
20 | #include <linux/init.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/errno.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/timer.h> | |
27 | #include <linux/bitops.h> | |
28 | ||
29 | #include <linux/signal.h> | |
30 | #include <linux/string.h> | |
31 | ||
32 | #include <linux/ip.h> | |
33 | #include <linux/if_arp.h> | |
34 | #include <linux/tcp.h> | |
35 | #include <linux/skbuff.h> | |
36 | #include <linux/ctype.h> | |
37 | #include <net/dst.h> | |
38 | ||
39 | #include <linux/io.h> | |
40 | #include <asm/ccwdev.h> | |
41 | #include <asm/ccwgroup.h> | |
42 | #include <linux/uaccess.h> | |
43 | ||
44 | #include <asm/idals.h> | |
45 | ||
46 | #include "fsm.h" | |
293d984f PT |
47 | |
48 | #include "ctcm_dbug.h" | |
49 | #include "ctcm_main.h" | |
50 | #include "ctcm_fsms.h" | |
51 | ||
52 | const char *dev_state_names[] = { | |
53 | [DEV_STATE_STOPPED] = "Stopped", | |
54 | [DEV_STATE_STARTWAIT_RXTX] = "StartWait RXTX", | |
55 | [DEV_STATE_STARTWAIT_RX] = "StartWait RX", | |
56 | [DEV_STATE_STARTWAIT_TX] = "StartWait TX", | |
57 | [DEV_STATE_STOPWAIT_RXTX] = "StopWait RXTX", | |
58 | [DEV_STATE_STOPWAIT_RX] = "StopWait RX", | |
59 | [DEV_STATE_STOPWAIT_TX] = "StopWait TX", | |
60 | [DEV_STATE_RUNNING] = "Running", | |
61 | }; | |
62 | ||
63 | const char *dev_event_names[] = { | |
64 | [DEV_EVENT_START] = "Start", | |
65 | [DEV_EVENT_STOP] = "Stop", | |
66 | [DEV_EVENT_RXUP] = "RX up", | |
67 | [DEV_EVENT_TXUP] = "TX up", | |
68 | [DEV_EVENT_RXDOWN] = "RX down", | |
69 | [DEV_EVENT_TXDOWN] = "TX down", | |
70 | [DEV_EVENT_RESTART] = "Restart", | |
71 | }; | |
72 | ||
73 | const char *ctc_ch_event_names[] = { | |
74 | [CTC_EVENT_IO_SUCCESS] = "ccw_device success", | |
75 | [CTC_EVENT_IO_EBUSY] = "ccw_device busy", | |
76 | [CTC_EVENT_IO_ENODEV] = "ccw_device enodev", | |
77 | [CTC_EVENT_IO_UNKNOWN] = "ccw_device unknown", | |
78 | [CTC_EVENT_ATTNBUSY] = "Status ATTN & BUSY", | |
79 | [CTC_EVENT_ATTN] = "Status ATTN", | |
80 | [CTC_EVENT_BUSY] = "Status BUSY", | |
81 | [CTC_EVENT_UC_RCRESET] = "Unit check remote reset", | |
82 | [CTC_EVENT_UC_RSRESET] = "Unit check remote system reset", | |
83 | [CTC_EVENT_UC_TXTIMEOUT] = "Unit check TX timeout", | |
84 | [CTC_EVENT_UC_TXPARITY] = "Unit check TX parity", | |
85 | [CTC_EVENT_UC_HWFAIL] = "Unit check Hardware failure", | |
86 | [CTC_EVENT_UC_RXPARITY] = "Unit check RX parity", | |
87 | [CTC_EVENT_UC_ZERO] = "Unit check ZERO", | |
88 | [CTC_EVENT_UC_UNKNOWN] = "Unit check Unknown", | |
89 | [CTC_EVENT_SC_UNKNOWN] = "SubChannel check Unknown", | |
90 | [CTC_EVENT_MC_FAIL] = "Machine check failure", | |
91 | [CTC_EVENT_MC_GOOD] = "Machine check operational", | |
92 | [CTC_EVENT_IRQ] = "IRQ normal", | |
93 | [CTC_EVENT_FINSTAT] = "IRQ final", | |
94 | [CTC_EVENT_TIMER] = "Timer", | |
95 | [CTC_EVENT_START] = "Start", | |
96 | [CTC_EVENT_STOP] = "Stop", | |
97 | /* | |
98 | * additional MPC events | |
99 | */ | |
100 | [CTC_EVENT_SEND_XID] = "XID Exchange", | |
101 | [CTC_EVENT_RSWEEP_TIMER] = "MPC Group Sweep Timer", | |
102 | }; | |
103 | ||
104 | const char *ctc_ch_state_names[] = { | |
105 | [CTC_STATE_IDLE] = "Idle", | |
106 | [CTC_STATE_STOPPED] = "Stopped", | |
107 | [CTC_STATE_STARTWAIT] = "StartWait", | |
108 | [CTC_STATE_STARTRETRY] = "StartRetry", | |
109 | [CTC_STATE_SETUPWAIT] = "SetupWait", | |
110 | [CTC_STATE_RXINIT] = "RX init", | |
111 | [CTC_STATE_TXINIT] = "TX init", | |
112 | [CTC_STATE_RX] = "RX", | |
113 | [CTC_STATE_TX] = "TX", | |
114 | [CTC_STATE_RXIDLE] = "RX idle", | |
115 | [CTC_STATE_TXIDLE] = "TX idle", | |
116 | [CTC_STATE_RXERR] = "RX error", | |
117 | [CTC_STATE_TXERR] = "TX error", | |
118 | [CTC_STATE_TERM] = "Terminating", | |
119 | [CTC_STATE_DTERM] = "Restarting", | |
120 | [CTC_STATE_NOTOP] = "Not operational", | |
121 | /* | |
122 | * additional MPC states | |
123 | */ | |
124 | [CH_XID0_PENDING] = "Pending XID0 Start", | |
125 | [CH_XID0_INPROGRESS] = "In XID0 Negotiations ", | |
126 | [CH_XID7_PENDING] = "Pending XID7 P1 Start", | |
127 | [CH_XID7_PENDING1] = "Active XID7 P1 Exchange ", | |
128 | [CH_XID7_PENDING2] = "Pending XID7 P2 Start ", | |
129 | [CH_XID7_PENDING3] = "Active XID7 P2 Exchange ", | |
130 | [CH_XID7_PENDING4] = "XID7 Complete - Pending READY ", | |
131 | }; | |
132 | ||
133 | static void ctcm_action_nop(fsm_instance *fi, int event, void *arg); | |
134 | ||
135 | /* | |
136 | * ----- static ctcm actions for channel statemachine ----- | |
137 | * | |
138 | */ | |
139 | static void chx_txdone(fsm_instance *fi, int event, void *arg); | |
140 | static void chx_rx(fsm_instance *fi, int event, void *arg); | |
141 | static void chx_rxidle(fsm_instance *fi, int event, void *arg); | |
142 | static void chx_firstio(fsm_instance *fi, int event, void *arg); | |
143 | static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg); | |
144 | static void ctcm_chx_start(fsm_instance *fi, int event, void *arg); | |
145 | static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg); | |
146 | static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg); | |
147 | static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg); | |
148 | static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg); | |
149 | static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg); | |
150 | static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg); | |
151 | static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg); | |
152 | static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg); | |
153 | static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg); | |
154 | static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg); | |
155 | static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg); | |
156 | static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg); | |
157 | ||
158 | /* | |
159 | * ----- static ctcmpc actions for ctcmpc channel statemachine ----- | |
160 | * | |
161 | */ | |
162 | static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg); | |
163 | static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg); | |
164 | static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg); | |
165 | /* shared : | |
166 | static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg); | |
167 | static void ctcm_chx_start(fsm_instance *fi, int event, void *arg); | |
168 | static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg); | |
169 | static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg); | |
170 | static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg); | |
171 | static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg); | |
172 | static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg); | |
173 | static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg); | |
174 | static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg); | |
175 | static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg); | |
176 | static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg); | |
177 | static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg); | |
178 | static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg); | |
179 | static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg); | |
180 | */ | |
181 | static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg); | |
182 | static void ctcmpc_chx_attnbusy(fsm_instance *, int, void *); | |
183 | static void ctcmpc_chx_resend(fsm_instance *, int, void *); | |
184 | static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg); | |
185 | ||
186 | /** | |
25985edc | 187 | * Check return code of a preceding ccw_device call, halt_IO etc... |
293d984f PT |
188 | * |
189 | * ch : The channel, the error belongs to. | |
190 | * Returns the error code (!= 0) to inspect. | |
191 | */ | |
192 | void ctcm_ccw_check_rc(struct channel *ch, int rc, char *msg) | |
193 | { | |
194 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, | |
2a7c6f2c PT |
195 | "%s(%s): %s: %04x\n", |
196 | CTCM_FUNTAIL, ch->id, msg, rc); | |
293d984f PT |
197 | switch (rc) { |
198 | case -EBUSY: | |
2a7c6f2c PT |
199 | pr_info("%s: The communication peer is busy\n", |
200 | ch->id); | |
293d984f PT |
201 | fsm_event(ch->fsm, CTC_EVENT_IO_EBUSY, ch); |
202 | break; | |
203 | case -ENODEV: | |
2a7c6f2c PT |
204 | pr_err("%s: The specified target device is not valid\n", |
205 | ch->id); | |
293d984f PT |
206 | fsm_event(ch->fsm, CTC_EVENT_IO_ENODEV, ch); |
207 | break; | |
208 | default: | |
2a7c6f2c PT |
209 | pr_err("An I/O operation resulted in error %04x\n", |
210 | rc); | |
293d984f PT |
211 | fsm_event(ch->fsm, CTC_EVENT_IO_UNKNOWN, ch); |
212 | } | |
213 | } | |
214 | ||
215 | void ctcm_purge_skb_queue(struct sk_buff_head *q) | |
216 | { | |
217 | struct sk_buff *skb; | |
218 | ||
aa3f2cb6 | 219 | CTCM_DBF_TEXT(TRACE, CTC_DBF_DEBUG, __func__); |
293d984f PT |
220 | |
221 | while ((skb = skb_dequeue(q))) { | |
222 | atomic_dec(&skb->users); | |
223 | dev_kfree_skb_any(skb); | |
224 | } | |
225 | } | |
226 | ||
227 | /** | |
228 | * NOP action for statemachines | |
229 | */ | |
230 | static void ctcm_action_nop(fsm_instance *fi, int event, void *arg) | |
231 | { | |
232 | } | |
233 | ||
234 | /* | |
235 | * Actions for channel - statemachines. | |
236 | */ | |
237 | ||
238 | /** | |
239 | * Normal data has been send. Free the corresponding | |
240 | * skb (it's in io_queue), reset dev->tbusy and | |
241 | * revert to idle state. | |
242 | * | |
243 | * fi An instance of a channel statemachine. | |
244 | * event The event, just happened. | |
245 | * arg Generic pointer, casted from channel * upon call. | |
246 | */ | |
247 | static void chx_txdone(fsm_instance *fi, int event, void *arg) | |
248 | { | |
249 | struct channel *ch = arg; | |
250 | struct net_device *dev = ch->netdev; | |
261893d3 | 251 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
252 | struct sk_buff *skb; |
253 | int first = 1; | |
254 | int i; | |
255 | unsigned long duration; | |
256 | struct timespec done_stamp = current_kernel_time(); /* xtime */ | |
257 | ||
aa3f2cb6 PT |
258 | CTCM_PR_DEBUG("%s(%s): %s\n", __func__, ch->id, dev->name); |
259 | ||
293d984f PT |
260 | duration = |
261 | (done_stamp.tv_sec - ch->prof.send_stamp.tv_sec) * 1000000 + | |
262 | (done_stamp.tv_nsec - ch->prof.send_stamp.tv_nsec) / 1000; | |
263 | if (duration > ch->prof.tx_time) | |
264 | ch->prof.tx_time = duration; | |
265 | ||
23d805b6 | 266 | if (ch->irb->scsw.cmd.count != 0) |
aa3f2cb6 PT |
267 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, |
268 | "%s(%s): TX not complete, remaining %d bytes", | |
269 | CTCM_FUNTAIL, dev->name, ch->irb->scsw.cmd.count); | |
293d984f PT |
270 | fsm_deltimer(&ch->timer); |
271 | while ((skb = skb_dequeue(&ch->io_queue))) { | |
272 | priv->stats.tx_packets++; | |
273 | priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH; | |
274 | if (first) { | |
275 | priv->stats.tx_bytes += 2; | |
276 | first = 0; | |
277 | } | |
278 | atomic_dec(&skb->users); | |
279 | dev_kfree_skb_irq(skb); | |
280 | } | |
281 | spin_lock(&ch->collect_lock); | |
282 | clear_normalized_cda(&ch->ccw[4]); | |
283 | if (ch->collect_len > 0) { | |
284 | int rc; | |
285 | ||
286 | if (ctcm_checkalloc_buffer(ch)) { | |
287 | spin_unlock(&ch->collect_lock); | |
288 | return; | |
289 | } | |
290 | ch->trans_skb->data = ch->trans_skb_data; | |
291 | skb_reset_tail_pointer(ch->trans_skb); | |
292 | ch->trans_skb->len = 0; | |
293 | if (ch->prof.maxmulti < (ch->collect_len + 2)) | |
294 | ch->prof.maxmulti = ch->collect_len + 2; | |
295 | if (ch->prof.maxcqueue < skb_queue_len(&ch->collect_queue)) | |
296 | ch->prof.maxcqueue = skb_queue_len(&ch->collect_queue); | |
297 | *((__u16 *)skb_put(ch->trans_skb, 2)) = ch->collect_len + 2; | |
298 | i = 0; | |
299 | while ((skb = skb_dequeue(&ch->collect_queue))) { | |
300 | skb_copy_from_linear_data(skb, | |
301 | skb_put(ch->trans_skb, skb->len), skb->len); | |
302 | priv->stats.tx_packets++; | |
303 | priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH; | |
304 | atomic_dec(&skb->users); | |
305 | dev_kfree_skb_irq(skb); | |
306 | i++; | |
307 | } | |
308 | ch->collect_len = 0; | |
309 | spin_unlock(&ch->collect_lock); | |
310 | ch->ccw[1].count = ch->trans_skb->len; | |
311 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
312 | ch->prof.send_stamp = current_kernel_time(); /* xtime */ | |
313 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
314 | (unsigned long)ch, 0xff, 0); | |
315 | ch->prof.doios_multi++; | |
316 | if (rc != 0) { | |
317 | priv->stats.tx_dropped += i; | |
318 | priv->stats.tx_errors += i; | |
319 | fsm_deltimer(&ch->timer); | |
320 | ctcm_ccw_check_rc(ch, rc, "chained TX"); | |
321 | } | |
322 | } else { | |
323 | spin_unlock(&ch->collect_lock); | |
324 | fsm_newstate(fi, CTC_STATE_TXIDLE); | |
325 | } | |
326 | ctcm_clear_busy_do(dev); | |
327 | } | |
328 | ||
329 | /** | |
330 | * Initial data is sent. | |
331 | * Notify device statemachine that we are up and | |
332 | * running. | |
333 | * | |
334 | * fi An instance of a channel statemachine. | |
335 | * event The event, just happened. | |
336 | * arg Generic pointer, casted from channel * upon call. | |
337 | */ | |
338 | void ctcm_chx_txidle(fsm_instance *fi, int event, void *arg) | |
339 | { | |
340 | struct channel *ch = arg; | |
341 | struct net_device *dev = ch->netdev; | |
261893d3 | 342 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 343 | |
aa3f2cb6 PT |
344 | CTCM_PR_DEBUG("%s(%s): %s\n", __func__, ch->id, dev->name); |
345 | ||
293d984f PT |
346 | fsm_deltimer(&ch->timer); |
347 | fsm_newstate(fi, CTC_STATE_TXIDLE); | |
348 | fsm_event(priv->fsm, DEV_EVENT_TXUP, ch->netdev); | |
349 | } | |
350 | ||
351 | /** | |
352 | * Got normal data, check for sanity, queue it up, allocate new buffer | |
353 | * trigger bottom half, and initiate next read. | |
354 | * | |
355 | * fi An instance of a channel statemachine. | |
356 | * event The event, just happened. | |
357 | * arg Generic pointer, casted from channel * upon call. | |
358 | */ | |
359 | static void chx_rx(fsm_instance *fi, int event, void *arg) | |
360 | { | |
361 | struct channel *ch = arg; | |
362 | struct net_device *dev = ch->netdev; | |
261893d3 | 363 | struct ctcm_priv *priv = dev->ml_priv; |
23d805b6 | 364 | int len = ch->max_bufsize - ch->irb->scsw.cmd.count; |
293d984f PT |
365 | struct sk_buff *skb = ch->trans_skb; |
366 | __u16 block_len = *((__u16 *)skb->data); | |
367 | int check_len; | |
368 | int rc; | |
369 | ||
370 | fsm_deltimer(&ch->timer); | |
371 | if (len < 8) { | |
aa3f2cb6 PT |
372 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
373 | "%s(%s): got packet with length %d < 8\n", | |
374 | CTCM_FUNTAIL, dev->name, len); | |
293d984f PT |
375 | priv->stats.rx_dropped++; |
376 | priv->stats.rx_length_errors++; | |
377 | goto again; | |
378 | } | |
379 | if (len > ch->max_bufsize) { | |
aa3f2cb6 PT |
380 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
381 | "%s(%s): got packet with length %d > %d\n", | |
382 | CTCM_FUNTAIL, dev->name, len, ch->max_bufsize); | |
293d984f PT |
383 | priv->stats.rx_dropped++; |
384 | priv->stats.rx_length_errors++; | |
385 | goto again; | |
386 | } | |
387 | ||
388 | /* | |
389 | * VM TCP seems to have a bug sending 2 trailing bytes of garbage. | |
390 | */ | |
391 | switch (ch->protocol) { | |
392 | case CTCM_PROTO_S390: | |
393 | case CTCM_PROTO_OS390: | |
394 | check_len = block_len + 2; | |
395 | break; | |
396 | default: | |
397 | check_len = block_len; | |
398 | break; | |
399 | } | |
400 | if ((len < block_len) || (len > check_len)) { | |
aa3f2cb6 PT |
401 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
402 | "%s(%s): got block length %d != rx length %d\n", | |
403 | CTCM_FUNTAIL, dev->name, block_len, len); | |
293d984f PT |
404 | if (do_debug) |
405 | ctcmpc_dump_skb(skb, 0); | |
406 | ||
407 | *((__u16 *)skb->data) = len; | |
408 | priv->stats.rx_dropped++; | |
409 | priv->stats.rx_length_errors++; | |
410 | goto again; | |
411 | } | |
fb8585fc RK |
412 | if (block_len > 2) { |
413 | *((__u16 *)skb->data) = block_len - 2; | |
293d984f PT |
414 | ctcm_unpack_skb(ch, skb); |
415 | } | |
416 | again: | |
417 | skb->data = ch->trans_skb_data; | |
418 | skb_reset_tail_pointer(skb); | |
419 | skb->len = 0; | |
420 | if (ctcm_checkalloc_buffer(ch)) | |
421 | return; | |
422 | ch->ccw[1].count = ch->max_bufsize; | |
423 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
424 | (unsigned long)ch, 0xff, 0); | |
425 | if (rc != 0) | |
426 | ctcm_ccw_check_rc(ch, rc, "normal RX"); | |
427 | } | |
428 | ||
429 | /** | |
430 | * Initialize connection by sending a __u16 of value 0. | |
431 | * | |
432 | * fi An instance of a channel statemachine. | |
433 | * event The event, just happened. | |
434 | * arg Generic pointer, casted from channel * upon call. | |
435 | */ | |
436 | static void chx_firstio(fsm_instance *fi, int event, void *arg) | |
437 | { | |
293d984f | 438 | int rc; |
aa3f2cb6 PT |
439 | struct channel *ch = arg; |
440 | int fsmstate = fsm_getstate(fi); | |
293d984f | 441 | |
aa3f2cb6 PT |
442 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
443 | "%s(%s) : %02x", | |
444 | CTCM_FUNTAIL, ch->id, fsmstate); | |
293d984f | 445 | |
aa3f2cb6 PT |
446 | ch->sense_rc = 0; /* reset unit check report control */ |
447 | if (fsmstate == CTC_STATE_TXIDLE) | |
448 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, | |
449 | "%s(%s): remote side issued READ?, init.\n", | |
450 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
451 | fsm_deltimer(&ch->timer); |
452 | if (ctcm_checkalloc_buffer(ch)) | |
453 | return; | |
aa3f2cb6 | 454 | if ((fsmstate == CTC_STATE_SETUPWAIT) && |
293d984f PT |
455 | (ch->protocol == CTCM_PROTO_OS390)) { |
456 | /* OS/390 resp. z/OS */ | |
3c09e264 | 457 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
293d984f PT |
458 | *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN; |
459 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, | |
460 | CTC_EVENT_TIMER, ch); | |
461 | chx_rxidle(fi, event, arg); | |
462 | } else { | |
463 | struct net_device *dev = ch->netdev; | |
261893d3 | 464 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
465 | fsm_newstate(fi, CTC_STATE_TXIDLE); |
466 | fsm_event(priv->fsm, DEV_EVENT_TXUP, dev); | |
467 | } | |
468 | return; | |
469 | } | |
293d984f PT |
470 | /* |
471 | * Don't setup a timer for receiving the initial RX frame | |
472 | * if in compatibility mode, since VM TCP delays the initial | |
473 | * frame until it has some data to send. | |
474 | */ | |
3c09e264 | 475 | if ((CHANNEL_DIRECTION(ch->flags) == CTCM_WRITE) || |
293d984f PT |
476 | (ch->protocol != CTCM_PROTO_S390)) |
477 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
478 | ||
479 | *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN; | |
480 | ch->ccw[1].count = 2; /* Transfer only length */ | |
481 | ||
3c09e264 | 482 | fsm_newstate(fi, (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) |
293d984f PT |
483 | ? CTC_STATE_RXINIT : CTC_STATE_TXINIT); |
484 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
485 | (unsigned long)ch, 0xff, 0); | |
486 | if (rc != 0) { | |
487 | fsm_deltimer(&ch->timer); | |
488 | fsm_newstate(fi, CTC_STATE_SETUPWAIT); | |
489 | ctcm_ccw_check_rc(ch, rc, "init IO"); | |
490 | } | |
491 | /* | |
492 | * If in compatibility mode since we don't setup a timer, we | |
493 | * also signal RX channel up immediately. This enables us | |
494 | * to send packets early which in turn usually triggers some | |
495 | * reply from VM TCP which brings up the RX channel to it's | |
496 | * final state. | |
497 | */ | |
3c09e264 | 498 | if ((CHANNEL_DIRECTION(ch->flags) == CTCM_READ) && |
293d984f PT |
499 | (ch->protocol == CTCM_PROTO_S390)) { |
500 | struct net_device *dev = ch->netdev; | |
261893d3 | 501 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
502 | fsm_event(priv->fsm, DEV_EVENT_RXUP, dev); |
503 | } | |
504 | } | |
505 | ||
506 | /** | |
507 | * Got initial data, check it. If OK, | |
508 | * notify device statemachine that we are up and | |
509 | * running. | |
510 | * | |
511 | * fi An instance of a channel statemachine. | |
512 | * event The event, just happened. | |
513 | * arg Generic pointer, casted from channel * upon call. | |
514 | */ | |
515 | static void chx_rxidle(fsm_instance *fi, int event, void *arg) | |
516 | { | |
517 | struct channel *ch = arg; | |
518 | struct net_device *dev = ch->netdev; | |
261893d3 | 519 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
520 | __u16 buflen; |
521 | int rc; | |
522 | ||
293d984f PT |
523 | fsm_deltimer(&ch->timer); |
524 | buflen = *((__u16 *)ch->trans_skb->data); | |
aa3f2cb6 PT |
525 | CTCM_PR_DEBUG("%s: %s: Initial RX count = %d\n", |
526 | __func__, dev->name, buflen); | |
293d984f PT |
527 | |
528 | if (buflen >= CTCM_INITIAL_BLOCKLEN) { | |
529 | if (ctcm_checkalloc_buffer(ch)) | |
530 | return; | |
531 | ch->ccw[1].count = ch->max_bufsize; | |
532 | fsm_newstate(fi, CTC_STATE_RXIDLE); | |
533 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
534 | (unsigned long)ch, 0xff, 0); | |
535 | if (rc != 0) { | |
536 | fsm_newstate(fi, CTC_STATE_RXINIT); | |
537 | ctcm_ccw_check_rc(ch, rc, "initial RX"); | |
538 | } else | |
539 | fsm_event(priv->fsm, DEV_EVENT_RXUP, dev); | |
540 | } else { | |
aa3f2cb6 PT |
541 | CTCM_PR_DEBUG("%s: %s: Initial RX count %d not %d\n", |
542 | __func__, dev->name, | |
543 | buflen, CTCM_INITIAL_BLOCKLEN); | |
293d984f PT |
544 | chx_firstio(fi, event, arg); |
545 | } | |
546 | } | |
547 | ||
548 | /** | |
549 | * Set channel into extended mode. | |
550 | * | |
551 | * fi An instance of a channel statemachine. | |
552 | * event The event, just happened. | |
553 | * arg Generic pointer, casted from channel * upon call. | |
554 | */ | |
555 | static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg) | |
556 | { | |
557 | struct channel *ch = arg; | |
558 | int rc; | |
559 | unsigned long saveflags = 0; | |
560 | int timeout = CTCM_TIME_5_SEC; | |
561 | ||
562 | fsm_deltimer(&ch->timer); | |
563 | if (IS_MPC(ch)) { | |
564 | timeout = 1500; | |
aa3f2cb6 PT |
565 | CTCM_PR_DEBUG("enter %s: cp=%i ch=0x%p id=%s\n", |
566 | __func__, smp_processor_id(), ch, ch->id); | |
293d984f PT |
567 | } |
568 | fsm_addtimer(&ch->timer, timeout, CTC_EVENT_TIMER, ch); | |
569 | fsm_newstate(fi, CTC_STATE_SETUPWAIT); | |
aa3f2cb6 | 570 | CTCM_CCW_DUMP((char *)&ch->ccw[6], sizeof(struct ccw1) * 2); |
293d984f PT |
571 | |
572 | if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */ | |
573 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
574 | /* Such conditional locking is undeterministic in | |
575 | * static view. => ignore sparse warnings here. */ | |
576 | ||
577 | rc = ccw_device_start(ch->cdev, &ch->ccw[6], | |
578 | (unsigned long)ch, 0xff, 0); | |
579 | if (event == CTC_EVENT_TIMER) /* see above comments */ | |
580 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
581 | if (rc != 0) { | |
582 | fsm_deltimer(&ch->timer); | |
583 | fsm_newstate(fi, CTC_STATE_STARTWAIT); | |
584 | ctcm_ccw_check_rc(ch, rc, "set Mode"); | |
585 | } else | |
586 | ch->retry = 0; | |
587 | } | |
588 | ||
589 | /** | |
590 | * Setup channel. | |
591 | * | |
592 | * fi An instance of a channel statemachine. | |
593 | * event The event, just happened. | |
594 | * arg Generic pointer, casted from channel * upon call. | |
595 | */ | |
596 | static void ctcm_chx_start(fsm_instance *fi, int event, void *arg) | |
597 | { | |
aa3f2cb6 | 598 | struct channel *ch = arg; |
293d984f | 599 | unsigned long saveflags; |
aa3f2cb6 | 600 | int rc; |
293d984f | 601 | |
aa3f2cb6 | 602 | CTCM_DBF_TEXT_(SETUP, CTC_DBF_INFO, "%s(%s): %s", |
3c09e264 UB |
603 | CTCM_FUNTAIL, ch->id, |
604 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? "RX" : "TX"); | |
293d984f PT |
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 | } | |
3c09e264 | 611 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
293d984f PT |
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)) { | |
aa3f2cb6 PT |
621 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, |
622 | "%s(%s): %s trans_skb alloc delayed " | |
623 | "until first transfer", | |
624 | CTCM_FUNTAIL, ch->id, | |
3c09e264 UB |
625 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? |
626 | "RX" : "TX"); | |
293d984f | 627 | } |
293d984f PT |
628 | ch->ccw[0].cmd_code = CCW_CMD_PREPARE; |
629 | ch->ccw[0].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
630 | ch->ccw[0].count = 0; | |
631 | ch->ccw[0].cda = 0; | |
632 | ch->ccw[2].cmd_code = CCW_CMD_NOOP; /* jointed CE + DE */ | |
633 | ch->ccw[2].flags = CCW_FLAG_SLI; | |
634 | ch->ccw[2].count = 0; | |
635 | ch->ccw[2].cda = 0; | |
636 | memcpy(&ch->ccw[3], &ch->ccw[0], sizeof(struct ccw1) * 3); | |
637 | ch->ccw[4].cda = 0; | |
638 | ch->ccw[4].flags &= ~CCW_FLAG_IDA; | |
639 | ||
640 | fsm_newstate(fi, CTC_STATE_STARTWAIT); | |
641 | fsm_addtimer(&ch->timer, 1000, CTC_EVENT_TIMER, ch); | |
642 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
643 | rc = ccw_device_halt(ch->cdev, (unsigned long)ch); | |
644 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
645 | if (rc != 0) { | |
646 | if (rc != -EBUSY) | |
647 | fsm_deltimer(&ch->timer); | |
648 | ctcm_ccw_check_rc(ch, rc, "initial HaltIO"); | |
649 | } | |
650 | } | |
651 | ||
652 | /** | |
653 | * Shutdown a channel. | |
654 | * | |
655 | * fi An instance of a channel statemachine. | |
656 | * event The event, just happened. | |
657 | * arg Generic pointer, casted from channel * upon call. | |
658 | */ | |
659 | static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg) | |
660 | { | |
661 | struct channel *ch = arg; | |
662 | unsigned long saveflags = 0; | |
663 | int rc; | |
664 | int oldstate; | |
665 | ||
293d984f PT |
666 | fsm_deltimer(&ch->timer); |
667 | if (IS_MPC(ch)) | |
668 | fsm_deltimer(&ch->sweep_timer); | |
669 | ||
670 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
671 | ||
672 | if (event == CTC_EVENT_STOP) /* only for STOP not yet locked */ | |
673 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
674 | /* Such conditional locking is undeterministic in | |
675 | * static view. => ignore sparse warnings here. */ | |
676 | oldstate = fsm_getstate(fi); | |
677 | fsm_newstate(fi, CTC_STATE_TERM); | |
678 | rc = ccw_device_halt(ch->cdev, (unsigned long)ch); | |
679 | ||
680 | if (event == CTC_EVENT_STOP) | |
681 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
682 | /* see remark above about conditional locking */ | |
683 | ||
684 | if (rc != 0 && rc != -EBUSY) { | |
685 | fsm_deltimer(&ch->timer); | |
686 | if (event != CTC_EVENT_STOP) { | |
687 | fsm_newstate(fi, oldstate); | |
aa3f2cb6 | 688 | ctcm_ccw_check_rc(ch, rc, (char *)__func__); |
293d984f PT |
689 | } |
690 | } | |
691 | } | |
692 | ||
693 | /** | |
694 | * Cleanup helper for chx_fail and chx_stopped | |
695 | * cleanup channels queue and notify interface statemachine. | |
696 | * | |
697 | * fi An instance of a channel statemachine. | |
698 | * state The next state (depending on caller). | |
699 | * ch The channel to operate on. | |
700 | */ | |
701 | static void ctcm_chx_cleanup(fsm_instance *fi, int state, | |
702 | struct channel *ch) | |
703 | { | |
704 | struct net_device *dev = ch->netdev; | |
261893d3 | 705 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 706 | |
aa3f2cb6 PT |
707 | CTCM_DBF_TEXT_(SETUP, CTC_DBF_NOTICE, |
708 | "%s(%s): %s[%d]\n", | |
709 | CTCM_FUNTAIL, dev->name, ch->id, state); | |
293d984f PT |
710 | |
711 | fsm_deltimer(&ch->timer); | |
712 | if (IS_MPC(ch)) | |
713 | fsm_deltimer(&ch->sweep_timer); | |
714 | ||
715 | fsm_newstate(fi, state); | |
716 | if (state == CTC_STATE_STOPPED && ch->trans_skb != NULL) { | |
717 | clear_normalized_cda(&ch->ccw[1]); | |
718 | dev_kfree_skb_any(ch->trans_skb); | |
719 | ch->trans_skb = NULL; | |
720 | } | |
721 | ||
722 | ch->th_seg = 0x00; | |
723 | ch->th_seq_num = 0x00; | |
3c09e264 | 724 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
293d984f PT |
725 | skb_queue_purge(&ch->io_queue); |
726 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
727 | } else { | |
728 | ctcm_purge_skb_queue(&ch->io_queue); | |
729 | if (IS_MPC(ch)) | |
730 | ctcm_purge_skb_queue(&ch->sweep_queue); | |
731 | spin_lock(&ch->collect_lock); | |
732 | ctcm_purge_skb_queue(&ch->collect_queue); | |
733 | ch->collect_len = 0; | |
734 | spin_unlock(&ch->collect_lock); | |
735 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
736 | } | |
737 | } | |
738 | ||
739 | /** | |
740 | * A channel has successfully been halted. | |
741 | * Cleanup it's queue and notify interface statemachine. | |
742 | * | |
743 | * fi An instance of a channel statemachine. | |
744 | * event The event, just happened. | |
745 | * arg Generic pointer, casted from channel * upon call. | |
746 | */ | |
747 | static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg) | |
748 | { | |
293d984f PT |
749 | ctcm_chx_cleanup(fi, CTC_STATE_STOPPED, arg); |
750 | } | |
751 | ||
752 | /** | |
753 | * A stop command from device statemachine arrived and we are in | |
754 | * not operational mode. Set state to stopped. | |
755 | * | |
756 | * fi An instance of a channel statemachine. | |
757 | * event The event, just happened. | |
758 | * arg Generic pointer, casted from channel * upon call. | |
759 | */ | |
760 | static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg) | |
761 | { | |
762 | fsm_newstate(fi, CTC_STATE_STOPPED); | |
763 | } | |
764 | ||
765 | /** | |
766 | * A machine check for no path, not operational status or gone device has | |
767 | * happened. | |
768 | * Cleanup queue and notify interface statemachine. | |
769 | * | |
770 | * fi An instance of a channel statemachine. | |
771 | * event The event, just happened. | |
772 | * arg Generic pointer, casted from channel * upon call. | |
773 | */ | |
774 | static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg) | |
775 | { | |
293d984f PT |
776 | ctcm_chx_cleanup(fi, CTC_STATE_NOTOP, arg); |
777 | } | |
778 | ||
779 | /** | |
780 | * Handle error during setup of channel. | |
781 | * | |
782 | * fi An instance of a channel statemachine. | |
783 | * event The event, just happened. | |
784 | * arg Generic pointer, casted from channel * upon call. | |
785 | */ | |
786 | static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg) | |
787 | { | |
788 | struct channel *ch = arg; | |
789 | struct net_device *dev = ch->netdev; | |
261893d3 | 790 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
791 | |
792 | /* | |
793 | * Special case: Got UC_RCRESET on setmode. | |
794 | * This means that remote side isn't setup. In this case | |
795 | * simply retry after some 10 secs... | |
796 | */ | |
797 | if ((fsm_getstate(fi) == CTC_STATE_SETUPWAIT) && | |
798 | ((event == CTC_EVENT_UC_RCRESET) || | |
799 | (event == CTC_EVENT_UC_RSRESET))) { | |
800 | fsm_newstate(fi, CTC_STATE_STARTRETRY); | |
801 | fsm_deltimer(&ch->timer); | |
802 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
3c09e264 UB |
803 | if (!IS_MPC(ch) && |
804 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ)) { | |
293d984f PT |
805 | int rc = ccw_device_halt(ch->cdev, (unsigned long)ch); |
806 | if (rc != 0) | |
807 | ctcm_ccw_check_rc(ch, rc, | |
808 | "HaltIO in chx_setuperr"); | |
809 | } | |
810 | return; | |
811 | } | |
812 | ||
813 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_CRIT, | |
aa3f2cb6 PT |
814 | "%s(%s) : %s error during %s channel setup state=%s\n", |
815 | CTCM_FUNTAIL, dev->name, ctc_ch_event_names[event], | |
3c09e264 | 816 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? "RX" : "TX", |
293d984f PT |
817 | fsm_getstate_str(fi)); |
818 | ||
3c09e264 | 819 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
293d984f PT |
820 | fsm_newstate(fi, CTC_STATE_RXERR); |
821 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
822 | } else { | |
823 | fsm_newstate(fi, CTC_STATE_TXERR); | |
824 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
825 | } | |
826 | } | |
827 | ||
828 | /** | |
829 | * Restart a channel after an error. | |
830 | * | |
831 | * fi An instance of a channel statemachine. | |
832 | * event The event, just happened. | |
833 | * arg Generic pointer, casted from channel * upon call. | |
834 | */ | |
835 | static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg) | |
836 | { | |
837 | struct channel *ch = arg; | |
838 | struct net_device *dev = ch->netdev; | |
839 | unsigned long saveflags = 0; | |
840 | int oldstate; | |
841 | int rc; | |
842 | ||
aa3f2cb6 PT |
843 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
844 | "%s: %s[%d] of %s\n", | |
845 | CTCM_FUNTAIL, ch->id, event, dev->name); | |
846 | ||
293d984f | 847 | fsm_deltimer(&ch->timer); |
aa3f2cb6 | 848 | |
293d984f PT |
849 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); |
850 | oldstate = fsm_getstate(fi); | |
851 | fsm_newstate(fi, CTC_STATE_STARTWAIT); | |
852 | if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */ | |
853 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
854 | /* Such conditional locking is a known problem for | |
855 | * sparse because its undeterministic in static view. | |
856 | * Warnings should be ignored here. */ | |
857 | rc = ccw_device_halt(ch->cdev, (unsigned long)ch); | |
858 | if (event == CTC_EVENT_TIMER) | |
859 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
860 | if (rc != 0) { | |
861 | if (rc != -EBUSY) { | |
862 | fsm_deltimer(&ch->timer); | |
863 | fsm_newstate(fi, oldstate); | |
864 | } | |
865 | ctcm_ccw_check_rc(ch, rc, "HaltIO in ctcm_chx_restart"); | |
866 | } | |
867 | } | |
868 | ||
869 | /** | |
870 | * Handle error during RX initial handshake (exchange of | |
871 | * 0-length block header) | |
872 | * | |
873 | * fi An instance of a channel statemachine. | |
874 | * event The event, just happened. | |
875 | * arg Generic pointer, casted from channel * upon call. | |
876 | */ | |
877 | static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg) | |
878 | { | |
879 | struct channel *ch = arg; | |
880 | struct net_device *dev = ch->netdev; | |
261893d3 | 881 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 882 | |
293d984f PT |
883 | if (event == CTC_EVENT_TIMER) { |
884 | if (!IS_MPCDEV(dev)) | |
885 | /* TODO : check if MPC deletes timer somewhere */ | |
886 | fsm_deltimer(&ch->timer); | |
293d984f PT |
887 | if (ch->retry++ < 3) |
888 | ctcm_chx_restart(fi, event, arg); | |
889 | else { | |
890 | fsm_newstate(fi, CTC_STATE_RXERR); | |
891 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
892 | } | |
2a7c6f2c PT |
893 | } else { |
894 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, | |
895 | "%s(%s): %s in %s", CTCM_FUNTAIL, ch->id, | |
896 | ctc_ch_event_names[event], fsm_getstate_str(fi)); | |
897 | ||
898 | dev_warn(&dev->dev, | |
899 | "Initialization failed with RX/TX init handshake " | |
900 | "error %s\n", ctc_ch_event_names[event]); | |
901 | } | |
293d984f PT |
902 | } |
903 | ||
904 | /** | |
905 | * Notify device statemachine if we gave up initialization | |
906 | * of RX channel. | |
907 | * | |
908 | * fi An instance of a channel statemachine. | |
909 | * event The event, just happened. | |
910 | * arg Generic pointer, casted from channel * upon call. | |
911 | */ | |
912 | static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg) | |
913 | { | |
914 | struct channel *ch = arg; | |
915 | struct net_device *dev = ch->netdev; | |
261893d3 | 916 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 917 | |
aa3f2cb6 PT |
918 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, |
919 | "%s(%s): RX %s busy, init. fail", | |
920 | CTCM_FUNTAIL, dev->name, ch->id); | |
293d984f | 921 | fsm_newstate(fi, CTC_STATE_RXERR); |
293d984f PT |
922 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); |
923 | } | |
924 | ||
925 | /** | |
926 | * Handle RX Unit check remote reset (remote disconnected) | |
927 | * | |
928 | * fi An instance of a channel statemachine. | |
929 | * event The event, just happened. | |
930 | * arg Generic pointer, casted from channel * upon call. | |
931 | */ | |
932 | static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg) | |
933 | { | |
934 | struct channel *ch = arg; | |
935 | struct channel *ch2; | |
936 | struct net_device *dev = ch->netdev; | |
261893d3 | 937 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 938 | |
aa3f2cb6 PT |
939 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
940 | "%s: %s: remote disconnect - re-init ...", | |
941 | CTCM_FUNTAIL, dev->name); | |
293d984f | 942 | fsm_deltimer(&ch->timer); |
293d984f PT |
943 | /* |
944 | * Notify device statemachine | |
945 | */ | |
946 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
947 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
948 | ||
949 | fsm_newstate(fi, CTC_STATE_DTERM); | |
3c09e264 | 950 | ch2 = priv->channel[CTCM_WRITE]; |
293d984f PT |
951 | fsm_newstate(ch2->fsm, CTC_STATE_DTERM); |
952 | ||
953 | ccw_device_halt(ch->cdev, (unsigned long)ch); | |
954 | ccw_device_halt(ch2->cdev, (unsigned long)ch2); | |
955 | } | |
956 | ||
957 | /** | |
958 | * Handle error during TX channel initialization. | |
959 | * | |
960 | * fi An instance of a channel statemachine. | |
961 | * event The event, just happened. | |
962 | * arg Generic pointer, casted from channel * upon call. | |
963 | */ | |
964 | static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg) | |
965 | { | |
966 | struct channel *ch = arg; | |
967 | struct net_device *dev = ch->netdev; | |
261893d3 | 968 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
969 | |
970 | if (event == CTC_EVENT_TIMER) { | |
971 | fsm_deltimer(&ch->timer); | |
293d984f PT |
972 | if (ch->retry++ < 3) |
973 | ctcm_chx_restart(fi, event, arg); | |
974 | else { | |
975 | fsm_newstate(fi, CTC_STATE_TXERR); | |
976 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
977 | } | |
978 | } else { | |
979 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, | |
aa3f2cb6 PT |
980 | "%s(%s): %s in %s", CTCM_FUNTAIL, ch->id, |
981 | ctc_ch_event_names[event], fsm_getstate_str(fi)); | |
293d984f | 982 | |
2a7c6f2c PT |
983 | dev_warn(&dev->dev, |
984 | "Initialization failed with RX/TX init handshake " | |
985 | "error %s\n", ctc_ch_event_names[event]); | |
293d984f PT |
986 | } |
987 | } | |
988 | ||
989 | /** | |
990 | * Handle TX timeout by retrying operation. | |
991 | * | |
992 | * fi An instance of a channel statemachine. | |
993 | * event The event, just happened. | |
994 | * arg Generic pointer, casted from channel * upon call. | |
995 | */ | |
996 | static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg) | |
997 | { | |
998 | struct channel *ch = arg; | |
999 | struct net_device *dev = ch->netdev; | |
261893d3 | 1000 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1001 | struct sk_buff *skb; |
1002 | ||
aa3f2cb6 PT |
1003 | CTCM_PR_DEBUG("Enter: %s: cp=%i ch=0x%p id=%s\n", |
1004 | __func__, smp_processor_id(), ch, ch->id); | |
293d984f PT |
1005 | |
1006 | fsm_deltimer(&ch->timer); | |
1007 | if (ch->retry++ > 3) { | |
1008 | struct mpc_group *gptr = priv->mpcg; | |
aa3f2cb6 PT |
1009 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_INFO, |
1010 | "%s: %s: retries exceeded", | |
1011 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1012 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); |
1013 | /* call restart if not MPC or if MPC and mpcg fsm is ready. | |
1014 | use gptr as mpc indicator */ | |
1015 | if (!(gptr && (fsm_getstate(gptr->fsm) != MPCG_STATE_READY))) | |
1016 | ctcm_chx_restart(fi, event, arg); | |
1017 | goto done; | |
1018 | } | |
1019 | ||
aa3f2cb6 PT |
1020 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, |
1021 | "%s : %s: retry %d", | |
1022 | CTCM_FUNTAIL, ch->id, ch->retry); | |
293d984f PT |
1023 | skb = skb_peek(&ch->io_queue); |
1024 | if (skb) { | |
1025 | int rc = 0; | |
1026 | unsigned long saveflags = 0; | |
1027 | clear_normalized_cda(&ch->ccw[4]); | |
1028 | ch->ccw[4].count = skb->len; | |
1029 | if (set_normalized_cda(&ch->ccw[4], skb->data)) { | |
aa3f2cb6 PT |
1030 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_INFO, |
1031 | "%s: %s: IDAL alloc failed", | |
1032 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1033 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); |
1034 | ctcm_chx_restart(fi, event, arg); | |
1035 | goto done; | |
1036 | } | |
1037 | fsm_addtimer(&ch->timer, 1000, CTC_EVENT_TIMER, ch); | |
1038 | if (event == CTC_EVENT_TIMER) /* for TIMER not yet locked */ | |
1039 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
1040 | /* Such conditional locking is a known problem for | |
1041 | * sparse because its undeterministic in static view. | |
1042 | * Warnings should be ignored here. */ | |
1043 | if (do_debug_ccw) | |
1044 | ctcmpc_dumpit((char *)&ch->ccw[3], | |
1045 | sizeof(struct ccw1) * 3); | |
1046 | ||
1047 | rc = ccw_device_start(ch->cdev, &ch->ccw[3], | |
1048 | (unsigned long)ch, 0xff, 0); | |
1049 | if (event == CTC_EVENT_TIMER) | |
1050 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), | |
1051 | saveflags); | |
1052 | if (rc != 0) { | |
1053 | fsm_deltimer(&ch->timer); | |
1054 | ctcm_ccw_check_rc(ch, rc, "TX in chx_txretry"); | |
1055 | ctcm_purge_skb_queue(&ch->io_queue); | |
1056 | } | |
1057 | } | |
1058 | done: | |
1059 | return; | |
1060 | } | |
1061 | ||
1062 | /** | |
1063 | * Handle fatal errors during an I/O command. | |
1064 | * | |
1065 | * fi An instance of a channel statemachine. | |
1066 | * event The event, just happened. | |
1067 | * arg Generic pointer, casted from channel * upon call. | |
1068 | */ | |
1069 | static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg) | |
1070 | { | |
1071 | struct channel *ch = arg; | |
1072 | struct net_device *dev = ch->netdev; | |
261893d3 | 1073 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 1074 | int rd = CHANNEL_DIRECTION(ch->flags); |
293d984f | 1075 | |
293d984f | 1076 | fsm_deltimer(&ch->timer); |
aa3f2cb6 PT |
1077 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, |
1078 | "%s: %s: %s unrecoverable channel error", | |
3c09e264 | 1079 | CTCM_FUNTAIL, ch->id, rd == CTCM_READ ? "RX" : "TX"); |
aa3f2cb6 | 1080 | |
293d984f PT |
1081 | if (IS_MPC(ch)) { |
1082 | priv->stats.tx_dropped++; | |
1083 | priv->stats.tx_errors++; | |
1084 | } | |
3c09e264 | 1085 | if (rd == CTCM_READ) { |
293d984f PT |
1086 | fsm_newstate(fi, CTC_STATE_RXERR); |
1087 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
1088 | } else { | |
293d984f PT |
1089 | fsm_newstate(fi, CTC_STATE_TXERR); |
1090 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | /* | |
1095 | * The ctcm statemachine for a channel. | |
1096 | */ | |
1097 | const fsm_node ch_fsm[] = { | |
1098 | { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop }, | |
1099 | { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start }, | |
1100 | { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1101 | { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop }, | |
1102 | ||
1103 | { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop }, | |
1104 | { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop }, | |
1105 | { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1106 | { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop }, | |
1107 | { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start }, | |
1108 | ||
1109 | { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1110 | { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop }, | |
1111 | { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, | |
1112 | { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr }, | |
1113 | { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1114 | { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1115 | ||
1116 | { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1117 | { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode }, | |
1118 | { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1119 | { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1120 | ||
1121 | { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1122 | { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop }, | |
1123 | { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, chx_firstio }, | |
1124 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1125 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1126 | { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode }, | |
1127 | { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1128 | { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1129 | ||
1130 | { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1131 | { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop }, | |
1132 | { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, chx_rxidle }, | |
1133 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr }, | |
1134 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr }, | |
1135 | { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr }, | |
1136 | { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail }, | |
1137 | { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1138 | { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, chx_firstio }, | |
1139 | { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1140 | ||
1141 | { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1142 | { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop }, | |
1143 | { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, chx_rx }, | |
1144 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc }, | |
1145 | { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1146 | { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1147 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, chx_rx }, | |
1148 | ||
1149 | { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1150 | { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop }, | |
1151 | { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle }, | |
1152 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr }, | |
1153 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr }, | |
1154 | { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr }, | |
1155 | { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1156 | { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1157 | ||
1158 | { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1159 | { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop }, | |
1160 | { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, chx_firstio }, | |
1161 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, | |
1162 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, | |
1163 | { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1164 | { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1165 | ||
1166 | { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop }, | |
1167 | { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart }, | |
1168 | { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped }, | |
1169 | { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, | |
1170 | { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, | |
1171 | { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1172 | ||
1173 | { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1174 | { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart }, | |
1175 | { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, | |
1176 | { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, | |
1177 | { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, | |
1178 | { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1179 | ||
1180 | { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1181 | { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop }, | |
1182 | { CTC_STATE_TX, CTC_EVENT_FINSTAT, chx_txdone }, | |
1183 | { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_txretry }, | |
1184 | { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_txretry }, | |
1185 | { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry }, | |
1186 | { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1187 | { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1188 | ||
1189 | { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1190 | { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1191 | { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1192 | { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1193 | }; | |
1194 | ||
1195 | int ch_fsm_len = ARRAY_SIZE(ch_fsm); | |
1196 | ||
1197 | /* | |
1198 | * MPC actions for mpc channel statemachine | |
1199 | * handling of MPC protocol requires extra | |
1200 | * statemachine and actions which are prefixed ctcmpc_ . | |
1201 | * The ctc_ch_states and ctc_ch_state_names, | |
1202 | * ctc_ch_events and ctc_ch_event_names share the ctcm definitions | |
1203 | * which are expanded by some elements. | |
1204 | */ | |
1205 | ||
1206 | /* | |
1207 | * Actions for mpc channel statemachine. | |
1208 | */ | |
1209 | ||
1210 | /** | |
1211 | * Normal data has been send. Free the corresponding | |
1212 | * skb (it's in io_queue), reset dev->tbusy and | |
1213 | * revert to idle state. | |
1214 | * | |
1215 | * fi An instance of a channel statemachine. | |
1216 | * event The event, just happened. | |
1217 | * arg Generic pointer, casted from channel * upon call. | |
1218 | */ | |
1219 | static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg) | |
1220 | { | |
1221 | struct channel *ch = arg; | |
1222 | struct net_device *dev = ch->netdev; | |
261893d3 | 1223 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1224 | struct mpc_group *grp = priv->mpcg; |
1225 | struct sk_buff *skb; | |
1226 | int first = 1; | |
1227 | int i; | |
293d984f PT |
1228 | __u32 data_space; |
1229 | unsigned long duration; | |
1230 | struct sk_buff *peekskb; | |
1231 | int rc; | |
1232 | struct th_header *header; | |
1233 | struct pdu *p_header; | |
aa3f2cb6 | 1234 | struct timespec done_stamp = current_kernel_time(); /* xtime */ |
293d984f | 1235 | |
aa3f2cb6 PT |
1236 | CTCM_PR_DEBUG("Enter %s: %s cp:%i\n", |
1237 | __func__, dev->name, smp_processor_id()); | |
293d984f | 1238 | |
aa3f2cb6 PT |
1239 | duration = |
1240 | (done_stamp.tv_sec - ch->prof.send_stamp.tv_sec) * 1000000 + | |
1241 | (done_stamp.tv_nsec - ch->prof.send_stamp.tv_nsec) / 1000; | |
293d984f PT |
1242 | if (duration > ch->prof.tx_time) |
1243 | ch->prof.tx_time = duration; | |
1244 | ||
23d805b6 | 1245 | if (ch->irb->scsw.cmd.count != 0) |
aa3f2cb6 PT |
1246 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
1247 | "%s(%s): TX not complete, remaining %d bytes", | |
1248 | CTCM_FUNTAIL, dev->name, ch->irb->scsw.cmd.count); | |
293d984f PT |
1249 | fsm_deltimer(&ch->timer); |
1250 | while ((skb = skb_dequeue(&ch->io_queue))) { | |
1251 | priv->stats.tx_packets++; | |
1252 | priv->stats.tx_bytes += skb->len - TH_HEADER_LENGTH; | |
1253 | if (first) { | |
1254 | priv->stats.tx_bytes += 2; | |
1255 | first = 0; | |
1256 | } | |
1257 | atomic_dec(&skb->users); | |
1258 | dev_kfree_skb_irq(skb); | |
1259 | } | |
1260 | spin_lock(&ch->collect_lock); | |
1261 | clear_normalized_cda(&ch->ccw[4]); | |
293d984f PT |
1262 | if ((ch->collect_len <= 0) || (grp->in_sweep != 0)) { |
1263 | spin_unlock(&ch->collect_lock); | |
1264 | fsm_newstate(fi, CTC_STATE_TXIDLE); | |
1265 | goto done; | |
1266 | } | |
1267 | ||
1268 | if (ctcm_checkalloc_buffer(ch)) { | |
1269 | spin_unlock(&ch->collect_lock); | |
1270 | goto done; | |
1271 | } | |
1272 | ch->trans_skb->data = ch->trans_skb_data; | |
1273 | skb_reset_tail_pointer(ch->trans_skb); | |
1274 | ch->trans_skb->len = 0; | |
1275 | if (ch->prof.maxmulti < (ch->collect_len + TH_HEADER_LENGTH)) | |
1276 | ch->prof.maxmulti = ch->collect_len + TH_HEADER_LENGTH; | |
1277 | if (ch->prof.maxcqueue < skb_queue_len(&ch->collect_queue)) | |
1278 | ch->prof.maxcqueue = skb_queue_len(&ch->collect_queue); | |
1279 | i = 0; | |
aa3f2cb6 | 1280 | p_header = NULL; |
293d984f PT |
1281 | data_space = grp->group_max_buflen - TH_HEADER_LENGTH; |
1282 | ||
aa3f2cb6 PT |
1283 | CTCM_PR_DBGDATA("%s: building trans_skb from collect_q" |
1284 | " data_space:%04x\n", | |
1285 | __func__, data_space); | |
1286 | ||
293d984f PT |
1287 | while ((skb = skb_dequeue(&ch->collect_queue))) { |
1288 | memcpy(skb_put(ch->trans_skb, skb->len), skb->data, skb->len); | |
1289 | p_header = (struct pdu *) | |
1290 | (skb_tail_pointer(ch->trans_skb) - skb->len); | |
1291 | p_header->pdu_flag = 0x00; | |
1292 | if (skb->protocol == ntohs(ETH_P_SNAP)) | |
1293 | p_header->pdu_flag |= 0x60; | |
1294 | else | |
1295 | p_header->pdu_flag |= 0x20; | |
1296 | ||
aa3f2cb6 PT |
1297 | CTCM_PR_DBGDATA("%s: trans_skb len:%04x \n", |
1298 | __func__, ch->trans_skb->len); | |
1299 | CTCM_PR_DBGDATA("%s: pdu header and data for up" | |
1300 | " to 32 bytes sent to vtam\n", __func__); | |
1301 | CTCM_D3_DUMP((char *)p_header, min_t(int, skb->len, 32)); | |
1302 | ||
293d984f PT |
1303 | ch->collect_len -= skb->len; |
1304 | data_space -= skb->len; | |
1305 | priv->stats.tx_packets++; | |
1306 | priv->stats.tx_bytes += skb->len; | |
1307 | atomic_dec(&skb->users); | |
1308 | dev_kfree_skb_any(skb); | |
1309 | peekskb = skb_peek(&ch->collect_queue); | |
1310 | if (peekskb->len > data_space) | |
1311 | break; | |
1312 | i++; | |
1313 | } | |
1314 | /* p_header points to the last one we handled */ | |
1315 | if (p_header) | |
1316 | p_header->pdu_flag |= PDU_LAST; /*Say it's the last one*/ | |
1317 | header = kzalloc(TH_HEADER_LENGTH, gfp_type()); | |
293d984f | 1318 | if (!header) { |
293d984f PT |
1319 | spin_unlock(&ch->collect_lock); |
1320 | fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev); | |
aa3f2cb6 | 1321 | goto done; |
293d984f | 1322 | } |
293d984f PT |
1323 | header->th_ch_flag = TH_HAS_PDU; /* Normal data */ |
1324 | ch->th_seq_num++; | |
1325 | header->th_seq_num = ch->th_seq_num; | |
1326 | ||
aa3f2cb6 PT |
1327 | CTCM_PR_DBGDATA("%s: ToVTAM_th_seq= %08x\n" , |
1328 | __func__, ch->th_seq_num); | |
293d984f PT |
1329 | |
1330 | memcpy(skb_push(ch->trans_skb, TH_HEADER_LENGTH), header, | |
1331 | TH_HEADER_LENGTH); /* put the TH on the packet */ | |
1332 | ||
1333 | kfree(header); | |
1334 | ||
aa3f2cb6 PT |
1335 | CTCM_PR_DBGDATA("%s: trans_skb len:%04x \n", |
1336 | __func__, ch->trans_skb->len); | |
1337 | CTCM_PR_DBGDATA("%s: up-to-50 bytes of trans_skb " | |
1338 | "data to vtam from collect_q\n", __func__); | |
1339 | CTCM_D3_DUMP((char *)ch->trans_skb->data, | |
293d984f | 1340 | min_t(int, ch->trans_skb->len, 50)); |
293d984f PT |
1341 | |
1342 | spin_unlock(&ch->collect_lock); | |
1343 | clear_normalized_cda(&ch->ccw[1]); | |
1344 | if (set_normalized_cda(&ch->ccw[1], ch->trans_skb->data)) { | |
1345 | dev_kfree_skb_any(ch->trans_skb); | |
1346 | ch->trans_skb = NULL; | |
aa3f2cb6 PT |
1347 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ERROR, |
1348 | "%s: %s: IDAL alloc failed", | |
1349 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1350 | fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev); |
1351 | return; | |
1352 | } | |
1353 | ch->ccw[1].count = ch->trans_skb->len; | |
1354 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
1355 | ch->prof.send_stamp = current_kernel_time(); /* xtime */ | |
1356 | if (do_debug_ccw) | |
1357 | ctcmpc_dumpit((char *)&ch->ccw[0], sizeof(struct ccw1) * 3); | |
1358 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
1359 | (unsigned long)ch, 0xff, 0); | |
1360 | ch->prof.doios_multi++; | |
1361 | if (rc != 0) { | |
1362 | priv->stats.tx_dropped += i; | |
1363 | priv->stats.tx_errors += i; | |
1364 | fsm_deltimer(&ch->timer); | |
1365 | ctcm_ccw_check_rc(ch, rc, "chained TX"); | |
1366 | } | |
1367 | done: | |
1368 | ctcm_clear_busy(dev); | |
293d984f PT |
1369 | return; |
1370 | } | |
1371 | ||
1372 | /** | |
1373 | * Got normal data, check for sanity, queue it up, allocate new buffer | |
1374 | * trigger bottom half, and initiate next read. | |
1375 | * | |
1376 | * fi An instance of a channel statemachine. | |
1377 | * event The event, just happened. | |
1378 | * arg Generic pointer, casted from channel * upon call. | |
1379 | */ | |
1380 | static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg) | |
1381 | { | |
1382 | struct channel *ch = arg; | |
1383 | struct net_device *dev = ch->netdev; | |
261893d3 | 1384 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1385 | struct mpc_group *grp = priv->mpcg; |
1386 | struct sk_buff *skb = ch->trans_skb; | |
1387 | struct sk_buff *new_skb; | |
aa3f2cb6 | 1388 | unsigned long saveflags = 0; /* avoids compiler warning */ |
23d805b6 | 1389 | int len = ch->max_bufsize - ch->irb->scsw.cmd.count; |
293d984f | 1390 | |
aa3f2cb6 PT |
1391 | CTCM_PR_DEBUG("%s: %s: cp:%i %s maxbuf : %04x, len: %04x\n", |
1392 | CTCM_FUNTAIL, dev->name, smp_processor_id(), | |
1393 | ch->id, ch->max_bufsize, len); | |
293d984f PT |
1394 | fsm_deltimer(&ch->timer); |
1395 | ||
1396 | if (skb == NULL) { | |
aa3f2cb6 PT |
1397 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1398 | "%s(%s): TRANS_SKB = NULL", | |
1399 | CTCM_FUNTAIL, dev->name); | |
1400 | goto again; | |
293d984f PT |
1401 | } |
1402 | ||
1403 | if (len < TH_HEADER_LENGTH) { | |
aa3f2cb6 PT |
1404 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1405 | "%s(%s): packet length %d to short", | |
1406 | CTCM_FUNTAIL, dev->name, len); | |
293d984f PT |
1407 | priv->stats.rx_dropped++; |
1408 | priv->stats.rx_length_errors++; | |
1409 | } else { | |
1410 | /* must have valid th header or game over */ | |
1411 | __u32 block_len = len; | |
1412 | len = TH_HEADER_LENGTH + XID2_LENGTH + 4; | |
1413 | new_skb = __dev_alloc_skb(ch->max_bufsize, GFP_ATOMIC); | |
1414 | ||
1415 | if (new_skb == NULL) { | |
aa3f2cb6 PT |
1416 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1417 | "%s(%d): skb allocation failed", | |
1418 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
1419 | fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev); |
1420 | goto again; | |
1421 | } | |
1422 | switch (fsm_getstate(grp->fsm)) { | |
1423 | case MPCG_STATE_RESET: | |
1424 | case MPCG_STATE_INOP: | |
1425 | dev_kfree_skb_any(new_skb); | |
1426 | break; | |
1427 | case MPCG_STATE_FLOWC: | |
1428 | case MPCG_STATE_READY: | |
1429 | memcpy(skb_put(new_skb, block_len), | |
1430 | skb->data, block_len); | |
1431 | skb_queue_tail(&ch->io_queue, new_skb); | |
1432 | tasklet_schedule(&ch->ch_tasklet); | |
1433 | break; | |
1434 | default: | |
1435 | memcpy(skb_put(new_skb, len), skb->data, len); | |
1436 | skb_queue_tail(&ch->io_queue, new_skb); | |
1437 | tasklet_hi_schedule(&ch->ch_tasklet); | |
1438 | break; | |
1439 | } | |
1440 | } | |
1441 | ||
1442 | again: | |
1443 | switch (fsm_getstate(grp->fsm)) { | |
1444 | int rc, dolock; | |
1445 | case MPCG_STATE_FLOWC: | |
1446 | case MPCG_STATE_READY: | |
1447 | if (ctcm_checkalloc_buffer(ch)) | |
1448 | break; | |
1449 | ch->trans_skb->data = ch->trans_skb_data; | |
1450 | skb_reset_tail_pointer(ch->trans_skb); | |
1451 | ch->trans_skb->len = 0; | |
1452 | ch->ccw[1].count = ch->max_bufsize; | |
1453 | if (do_debug_ccw) | |
1454 | ctcmpc_dumpit((char *)&ch->ccw[0], | |
1455 | sizeof(struct ccw1) * 3); | |
1456 | dolock = !in_irq(); | |
1457 | if (dolock) | |
1458 | spin_lock_irqsave( | |
1459 | get_ccwdev_lock(ch->cdev), saveflags); | |
1460 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
1461 | (unsigned long)ch, 0xff, 0); | |
1462 | if (dolock) /* see remark about conditional locking */ | |
1463 | spin_unlock_irqrestore( | |
1464 | get_ccwdev_lock(ch->cdev), saveflags); | |
1465 | if (rc != 0) | |
1466 | ctcm_ccw_check_rc(ch, rc, "normal RX"); | |
1467 | default: | |
1468 | break; | |
1469 | } | |
1470 | ||
aa3f2cb6 PT |
1471 | CTCM_PR_DEBUG("Exit %s: %s, ch=0x%p, id=%s\n", |
1472 | __func__, dev->name, ch, ch->id); | |
293d984f PT |
1473 | |
1474 | } | |
1475 | ||
1476 | /** | |
1477 | * Initialize connection by sending a __u16 of value 0. | |
1478 | * | |
1479 | * fi An instance of a channel statemachine. | |
1480 | * event The event, just happened. | |
1481 | * arg Generic pointer, casted from channel * upon call. | |
1482 | */ | |
1483 | static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg) | |
1484 | { | |
1485 | struct channel *ch = arg; | |
1486 | struct net_device *dev = ch->netdev; | |
261893d3 | 1487 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 PT |
1488 | struct mpc_group *gptr = priv->mpcg; |
1489 | ||
1490 | CTCM_PR_DEBUG("Enter %s: id=%s, ch=0x%p\n", | |
1491 | __func__, ch->id, ch); | |
1492 | ||
1493 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_INFO, | |
1494 | "%s: %s: chstate:%i, grpstate:%i, prot:%i\n", | |
1495 | CTCM_FUNTAIL, ch->id, fsm_getstate(fi), | |
1496 | fsm_getstate(gptr->fsm), ch->protocol); | |
293d984f | 1497 | |
293d984f PT |
1498 | if (fsm_getstate(fi) == CTC_STATE_TXIDLE) |
1499 | MPC_DBF_DEV_NAME(TRACE, dev, "remote side issued READ? "); | |
1500 | ||
1501 | fsm_deltimer(&ch->timer); | |
1502 | if (ctcm_checkalloc_buffer(ch)) | |
1503 | goto done; | |
1504 | ||
1505 | switch (fsm_getstate(fi)) { | |
1506 | case CTC_STATE_STARTRETRY: | |
1507 | case CTC_STATE_SETUPWAIT: | |
3c09e264 | 1508 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
293d984f PT |
1509 | ctcmpc_chx_rxidle(fi, event, arg); |
1510 | } else { | |
1511 | fsm_newstate(fi, CTC_STATE_TXIDLE); | |
1512 | fsm_event(priv->fsm, DEV_EVENT_TXUP, dev); | |
1513 | } | |
1514 | goto done; | |
1515 | default: | |
1516 | break; | |
1517 | }; | |
1518 | ||
3c09e264 | 1519 | fsm_newstate(fi, (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) |
293d984f PT |
1520 | ? CTC_STATE_RXINIT : CTC_STATE_TXINIT); |
1521 | ||
1522 | done: | |
aa3f2cb6 PT |
1523 | CTCM_PR_DEBUG("Exit %s: id=%s, ch=0x%p\n", |
1524 | __func__, ch->id, ch); | |
293d984f PT |
1525 | return; |
1526 | } | |
1527 | ||
1528 | /** | |
1529 | * Got initial data, check it. If OK, | |
1530 | * notify device statemachine that we are up and | |
1531 | * running. | |
1532 | * | |
1533 | * fi An instance of a channel statemachine. | |
1534 | * event The event, just happened. | |
1535 | * arg Generic pointer, casted from channel * upon call. | |
1536 | */ | |
1537 | void ctcmpc_chx_rxidle(fsm_instance *fi, int event, void *arg) | |
1538 | { | |
1539 | struct channel *ch = arg; | |
1540 | struct net_device *dev = ch->netdev; | |
261893d3 | 1541 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1542 | struct mpc_group *grp = priv->mpcg; |
1543 | int rc; | |
1544 | unsigned long saveflags = 0; /* avoids compiler warning */ | |
1545 | ||
1546 | fsm_deltimer(&ch->timer); | |
aa3f2cb6 PT |
1547 | CTCM_PR_DEBUG("%s: %s: %s: cp:%i, chstate:%i grpstate:%i\n", |
1548 | __func__, ch->id, dev->name, smp_processor_id(), | |
1549 | fsm_getstate(fi), fsm_getstate(grp->fsm)); | |
293d984f PT |
1550 | |
1551 | fsm_newstate(fi, CTC_STATE_RXIDLE); | |
1552 | /* XID processing complete */ | |
1553 | ||
1554 | switch (fsm_getstate(grp->fsm)) { | |
1555 | case MPCG_STATE_FLOWC: | |
1556 | case MPCG_STATE_READY: | |
1557 | if (ctcm_checkalloc_buffer(ch)) | |
1558 | goto done; | |
1559 | ch->trans_skb->data = ch->trans_skb_data; | |
1560 | skb_reset_tail_pointer(ch->trans_skb); | |
1561 | ch->trans_skb->len = 0; | |
1562 | ch->ccw[1].count = ch->max_bufsize; | |
aa3f2cb6 | 1563 | CTCM_CCW_DUMP((char *)&ch->ccw[0], sizeof(struct ccw1) * 3); |
293d984f PT |
1564 | if (event == CTC_EVENT_START) |
1565 | /* see remark about conditional locking */ | |
1566 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
1567 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
1568 | (unsigned long)ch, 0xff, 0); | |
1569 | if (event == CTC_EVENT_START) | |
1570 | spin_unlock_irqrestore( | |
1571 | get_ccwdev_lock(ch->cdev), saveflags); | |
1572 | if (rc != 0) { | |
1573 | fsm_newstate(fi, CTC_STATE_RXINIT); | |
1574 | ctcm_ccw_check_rc(ch, rc, "initial RX"); | |
1575 | goto done; | |
1576 | } | |
1577 | break; | |
1578 | default: | |
1579 | break; | |
1580 | } | |
1581 | ||
1582 | fsm_event(priv->fsm, DEV_EVENT_RXUP, dev); | |
1583 | done: | |
293d984f PT |
1584 | return; |
1585 | } | |
1586 | ||
1587 | /* | |
1588 | * ctcmpc channel FSM action | |
1589 | * called from several points in ctcmpc_ch_fsm | |
1590 | * ctcmpc only | |
1591 | */ | |
1592 | static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg) | |
1593 | { | |
1594 | struct channel *ch = arg; | |
1595 | struct net_device *dev = ch->netdev; | |
261893d3 | 1596 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1597 | struct mpc_group *grp = priv->mpcg; |
1598 | ||
aa3f2cb6 PT |
1599 | CTCM_PR_DEBUG("%s(%s): %s(ch=0x%p), cp=%i, ChStat:%s, GrpStat:%s\n", |
1600 | __func__, dev->name, ch->id, ch, smp_processor_id(), | |
1601 | fsm_getstate_str(ch->fsm), fsm_getstate_str(grp->fsm)); | |
293d984f PT |
1602 | |
1603 | switch (fsm_getstate(grp->fsm)) { | |
1604 | case MPCG_STATE_XID2INITW: | |
1605 | /* ok..start yside xid exchanges */ | |
1606 | if (!ch->in_mpcgroup) | |
1607 | break; | |
1608 | if (fsm_getstate(ch->fsm) == CH_XID0_PENDING) { | |
1609 | fsm_deltimer(&grp->timer); | |
1610 | fsm_addtimer(&grp->timer, | |
1611 | MPC_XID_TIMEOUT_VALUE, | |
1612 | MPCG_EVENT_TIMER, dev); | |
1613 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch); | |
1614 | ||
1615 | } else if (fsm_getstate(ch->fsm) < CH_XID7_PENDING1) | |
1616 | /* attn rcvd before xid0 processed via bh */ | |
1617 | fsm_newstate(ch->fsm, CH_XID7_PENDING1); | |
1618 | break; | |
1619 | case MPCG_STATE_XID2INITX: | |
1620 | case MPCG_STATE_XID0IOWAIT: | |
1621 | case MPCG_STATE_XID0IOWAIX: | |
1622 | /* attn rcvd before xid0 processed on ch | |
1623 | but mid-xid0 processing for group */ | |
1624 | if (fsm_getstate(ch->fsm) < CH_XID7_PENDING1) | |
1625 | fsm_newstate(ch->fsm, CH_XID7_PENDING1); | |
1626 | break; | |
1627 | case MPCG_STATE_XID7INITW: | |
1628 | case MPCG_STATE_XID7INITX: | |
1629 | case MPCG_STATE_XID7INITI: | |
1630 | case MPCG_STATE_XID7INITZ: | |
1631 | switch (fsm_getstate(ch->fsm)) { | |
1632 | case CH_XID7_PENDING: | |
1633 | fsm_newstate(ch->fsm, CH_XID7_PENDING1); | |
1634 | break; | |
1635 | case CH_XID7_PENDING2: | |
1636 | fsm_newstate(ch->fsm, CH_XID7_PENDING3); | |
1637 | break; | |
1638 | } | |
1639 | fsm_event(grp->fsm, MPCG_EVENT_XID7DONE, dev); | |
1640 | break; | |
1641 | } | |
1642 | ||
293d984f | 1643 | return; |
293d984f PT |
1644 | } |
1645 | ||
1646 | /* | |
1647 | * ctcmpc channel FSM action | |
1648 | * called from one point in ctcmpc_ch_fsm | |
1649 | * ctcmpc only | |
1650 | */ | |
1651 | static void ctcmpc_chx_attnbusy(fsm_instance *fsm, int event, void *arg) | |
1652 | { | |
1653 | struct channel *ch = arg; | |
1654 | struct net_device *dev = ch->netdev; | |
261893d3 | 1655 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1656 | struct mpc_group *grp = priv->mpcg; |
1657 | ||
aa3f2cb6 PT |
1658 | CTCM_PR_DEBUG("%s(%s): %s\n ChState:%s GrpState:%s\n", |
1659 | __func__, dev->name, ch->id, | |
1660 | fsm_getstate_str(ch->fsm), fsm_getstate_str(grp->fsm)); | |
293d984f PT |
1661 | |
1662 | fsm_deltimer(&ch->timer); | |
1663 | ||
1664 | switch (fsm_getstate(grp->fsm)) { | |
1665 | case MPCG_STATE_XID0IOWAIT: | |
1666 | /* vtam wants to be primary.start yside xid exchanges*/ | |
1667 | /* only receive one attn-busy at a time so must not */ | |
1668 | /* change state each time */ | |
1669 | grp->changed_side = 1; | |
1670 | fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW); | |
1671 | break; | |
1672 | case MPCG_STATE_XID2INITW: | |
1673 | if (grp->changed_side == 1) { | |
1674 | grp->changed_side = 2; | |
1675 | break; | |
1676 | } | |
1677 | /* process began via call to establish_conn */ | |
1678 | /* so must report failure instead of reverting */ | |
1679 | /* back to ready-for-xid passive state */ | |
1680 | if (grp->estconnfunc) | |
1681 | goto done; | |
1682 | /* this attnbusy is NOT the result of xside xid */ | |
1683 | /* collisions so yside must have been triggered */ | |
1684 | /* by an ATTN that was not intended to start XID */ | |
1685 | /* processing. Revert back to ready-for-xid and */ | |
1686 | /* wait for ATTN interrupt to signal xid start */ | |
1687 | if (fsm_getstate(ch->fsm) == CH_XID0_INPROGRESS) { | |
1688 | fsm_newstate(ch->fsm, CH_XID0_PENDING) ; | |
1689 | fsm_deltimer(&grp->timer); | |
1690 | goto done; | |
1691 | } | |
1692 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1693 | goto done; | |
1694 | case MPCG_STATE_XID2INITX: | |
1695 | /* XID2 was received before ATTN Busy for second | |
1696 | channel.Send yside xid for second channel. | |
1697 | */ | |
1698 | if (grp->changed_side == 1) { | |
1699 | grp->changed_side = 2; | |
1700 | break; | |
1701 | } | |
1702 | case MPCG_STATE_XID0IOWAIX: | |
1703 | case MPCG_STATE_XID7INITW: | |
1704 | case MPCG_STATE_XID7INITX: | |
1705 | case MPCG_STATE_XID7INITI: | |
1706 | case MPCG_STATE_XID7INITZ: | |
1707 | default: | |
1708 | /* multiple attn-busy indicates too out-of-sync */ | |
1709 | /* and they are certainly not being received as part */ | |
1710 | /* of valid mpc group negotiations.. */ | |
1711 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1712 | goto done; | |
1713 | } | |
1714 | ||
1715 | if (grp->changed_side == 1) { | |
1716 | fsm_deltimer(&grp->timer); | |
1717 | fsm_addtimer(&grp->timer, MPC_XID_TIMEOUT_VALUE, | |
1718 | MPCG_EVENT_TIMER, dev); | |
1719 | } | |
1720 | if (ch->in_mpcgroup) | |
1721 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch); | |
1722 | else | |
aa3f2cb6 PT |
1723 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1724 | "%s(%s): channel %s not added to group", | |
1725 | CTCM_FUNTAIL, dev->name, ch->id); | |
293d984f PT |
1726 | |
1727 | done: | |
293d984f | 1728 | return; |
293d984f PT |
1729 | } |
1730 | ||
1731 | /* | |
1732 | * ctcmpc channel FSM action | |
1733 | * called from several points in ctcmpc_ch_fsm | |
1734 | * ctcmpc only | |
1735 | */ | |
1736 | static void ctcmpc_chx_resend(fsm_instance *fsm, int event, void *arg) | |
1737 | { | |
1738 | struct channel *ch = arg; | |
1739 | struct net_device *dev = ch->netdev; | |
261893d3 | 1740 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1741 | struct mpc_group *grp = priv->mpcg; |
1742 | ||
293d984f | 1743 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch); |
293d984f PT |
1744 | return; |
1745 | } | |
1746 | ||
1747 | /* | |
1748 | * ctcmpc channel FSM action | |
1749 | * called from several points in ctcmpc_ch_fsm | |
1750 | * ctcmpc only | |
1751 | */ | |
1752 | static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg) | |
1753 | { | |
1754 | struct channel *ach = arg; | |
1755 | struct net_device *dev = ach->netdev; | |
261893d3 | 1756 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 1757 | struct mpc_group *grp = priv->mpcg; |
3c09e264 UB |
1758 | struct channel *wch = priv->channel[CTCM_WRITE]; |
1759 | struct channel *rch = priv->channel[CTCM_READ]; | |
293d984f PT |
1760 | struct sk_buff *skb; |
1761 | struct th_sweep *header; | |
1762 | int rc = 0; | |
1763 | unsigned long saveflags = 0; | |
1764 | ||
aa3f2cb6 PT |
1765 | CTCM_PR_DEBUG("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s\n", |
1766 | __func__, smp_processor_id(), ach, ach->id); | |
293d984f PT |
1767 | |
1768 | if (grp->in_sweep == 0) | |
1769 | goto done; | |
1770 | ||
aa3f2cb6 PT |
1771 | CTCM_PR_DBGDATA("%s: 1: ToVTAM_th_seq= %08x\n" , |
1772 | __func__, wch->th_seq_num); | |
1773 | CTCM_PR_DBGDATA("%s: 1: FromVTAM_th_seq= %08x\n" , | |
1774 | __func__, rch->th_seq_num); | |
293d984f PT |
1775 | |
1776 | if (fsm_getstate(wch->fsm) != CTC_STATE_TXIDLE) { | |
1777 | /* give the previous IO time to complete */ | |
1778 | fsm_addtimer(&wch->sweep_timer, | |
1779 | 200, CTC_EVENT_RSWEEP_TIMER, wch); | |
1780 | goto done; | |
1781 | } | |
1782 | ||
1783 | skb = skb_dequeue(&wch->sweep_queue); | |
1784 | if (!skb) | |
1785 | goto done; | |
1786 | ||
1787 | if (set_normalized_cda(&wch->ccw[4], skb->data)) { | |
1788 | grp->in_sweep = 0; | |
1789 | ctcm_clear_busy_do(dev); | |
1790 | dev_kfree_skb_any(skb); | |
1791 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1792 | goto done; | |
1793 | } else { | |
1794 | atomic_inc(&skb->users); | |
1795 | skb_queue_tail(&wch->io_queue, skb); | |
1796 | } | |
1797 | ||
1798 | /* send out the sweep */ | |
1799 | wch->ccw[4].count = skb->len; | |
1800 | ||
1801 | header = (struct th_sweep *)skb->data; | |
1802 | switch (header->th.th_ch_flag) { | |
1803 | case TH_SWEEP_REQ: | |
1804 | grp->sweep_req_pend_num--; | |
1805 | break; | |
1806 | case TH_SWEEP_RESP: | |
1807 | grp->sweep_rsp_pend_num--; | |
1808 | break; | |
1809 | } | |
1810 | ||
1811 | header->sw.th_last_seq = wch->th_seq_num; | |
1812 | ||
aa3f2cb6 PT |
1813 | CTCM_CCW_DUMP((char *)&wch->ccw[3], sizeof(struct ccw1) * 3); |
1814 | CTCM_PR_DBGDATA("%s: sweep packet\n", __func__); | |
1815 | CTCM_D3_DUMP((char *)header, TH_SWEEP_LENGTH); | |
293d984f PT |
1816 | |
1817 | fsm_addtimer(&wch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, wch); | |
1818 | fsm_newstate(wch->fsm, CTC_STATE_TX); | |
1819 | ||
1820 | spin_lock_irqsave(get_ccwdev_lock(wch->cdev), saveflags); | |
1821 | wch->prof.send_stamp = current_kernel_time(); /* xtime */ | |
1822 | rc = ccw_device_start(wch->cdev, &wch->ccw[3], | |
1823 | (unsigned long) wch, 0xff, 0); | |
1824 | spin_unlock_irqrestore(get_ccwdev_lock(wch->cdev), saveflags); | |
1825 | ||
1826 | if ((grp->sweep_req_pend_num == 0) && | |
1827 | (grp->sweep_rsp_pend_num == 0)) { | |
1828 | grp->in_sweep = 0; | |
1829 | rch->th_seq_num = 0x00; | |
1830 | wch->th_seq_num = 0x00; | |
1831 | ctcm_clear_busy_do(dev); | |
1832 | } | |
1833 | ||
aa3f2cb6 PT |
1834 | CTCM_PR_DBGDATA("%s: To-/From-VTAM_th_seq = %08x/%08x\n" , |
1835 | __func__, wch->th_seq_num, rch->th_seq_num); | |
293d984f PT |
1836 | |
1837 | if (rc != 0) | |
1838 | ctcm_ccw_check_rc(wch, rc, "send sweep"); | |
1839 | ||
1840 | done: | |
293d984f PT |
1841 | return; |
1842 | } | |
1843 | ||
1844 | ||
1845 | /* | |
1846 | * The ctcmpc statemachine for a channel. | |
1847 | */ | |
1848 | ||
1849 | const fsm_node ctcmpc_ch_fsm[] = { | |
1850 | { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop }, | |
1851 | { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start }, | |
1852 | { CTC_STATE_STOPPED, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1853 | { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1854 | { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop }, | |
1855 | ||
1856 | { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop }, | |
1857 | { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop }, | |
1858 | { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1859 | { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop }, | |
1860 | { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start }, | |
1861 | { CTC_STATE_NOTOP, CTC_EVENT_UC_RCRESET, ctcm_chx_stop }, | |
1862 | { CTC_STATE_NOTOP, CTC_EVENT_UC_RSRESET, ctcm_chx_stop }, | |
1863 | { CTC_STATE_NOTOP, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1864 | ||
1865 | { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1866 | { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop }, | |
1867 | { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, | |
1868 | { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr }, | |
1869 | { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1870 | { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1871 | ||
1872 | { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1873 | { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode }, | |
1874 | { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, | |
1875 | { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1876 | { CTC_STATE_STARTRETRY, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1877 | ||
1878 | { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1879 | { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop }, | |
1880 | { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio }, | |
1881 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1882 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1883 | { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode }, | |
1884 | { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1885 | { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1886 | ||
1887 | { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1888 | { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop }, | |
1889 | { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, ctcmpc_chx_rxidle }, | |
1890 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr }, | |
1891 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr }, | |
1892 | { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr }, | |
1893 | { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail }, | |
1894 | { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1895 | { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, ctcmpc_chx_firstio }, | |
1896 | { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1897 | ||
1898 | { CH_XID0_PENDING, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1899 | { CH_XID0_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1900 | { CH_XID0_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1901 | { CH_XID0_PENDING, CTC_EVENT_START, ctcm_action_nop }, | |
1902 | { CH_XID0_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1903 | { CH_XID0_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1904 | { CH_XID0_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1905 | { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1906 | { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1907 | { CH_XID0_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1908 | ||
1909 | { CH_XID0_INPROGRESS, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1910 | { CH_XID0_INPROGRESS, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1911 | { CH_XID0_INPROGRESS, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1912 | { CH_XID0_INPROGRESS, CTC_EVENT_START, ctcm_action_nop }, | |
1913 | { CH_XID0_INPROGRESS, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1914 | { CH_XID0_INPROGRESS, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1915 | { CH_XID0_INPROGRESS, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1916 | { CH_XID0_INPROGRESS, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1917 | { CH_XID0_INPROGRESS, CTC_EVENT_ATTNBUSY, ctcmpc_chx_attnbusy }, | |
1918 | { CH_XID0_INPROGRESS, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1919 | { CH_XID0_INPROGRESS, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1920 | ||
1921 | { CH_XID7_PENDING, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1922 | { CH_XID7_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1923 | { CH_XID7_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1924 | { CH_XID7_PENDING, CTC_EVENT_START, ctcm_action_nop }, | |
1925 | { CH_XID7_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1926 | { CH_XID7_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1927 | { CH_XID7_PENDING, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1928 | { CH_XID7_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1929 | { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1930 | { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1931 | { CH_XID7_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1932 | { CH_XID7_PENDING, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1933 | { CH_XID7_PENDING, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1934 | ||
1935 | { CH_XID7_PENDING1, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1936 | { CH_XID7_PENDING1, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1937 | { CH_XID7_PENDING1, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1938 | { CH_XID7_PENDING1, CTC_EVENT_START, ctcm_action_nop }, | |
1939 | { CH_XID7_PENDING1, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1940 | { CH_XID7_PENDING1, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1941 | { CH_XID7_PENDING1, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1942 | { CH_XID7_PENDING1, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1943 | { CH_XID7_PENDING1, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1944 | { CH_XID7_PENDING1, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1945 | { CH_XID7_PENDING1, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1946 | { CH_XID7_PENDING1, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1947 | ||
1948 | { CH_XID7_PENDING2, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1949 | { CH_XID7_PENDING2, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1950 | { CH_XID7_PENDING2, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1951 | { CH_XID7_PENDING2, CTC_EVENT_START, ctcm_action_nop }, | |
1952 | { CH_XID7_PENDING2, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1953 | { CH_XID7_PENDING2, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1954 | { CH_XID7_PENDING2, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1955 | { CH_XID7_PENDING2, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1956 | { CH_XID7_PENDING2, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1957 | { CH_XID7_PENDING2, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1958 | { CH_XID7_PENDING2, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1959 | { CH_XID7_PENDING2, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1960 | ||
1961 | { CH_XID7_PENDING3, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1962 | { CH_XID7_PENDING3, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1963 | { CH_XID7_PENDING3, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1964 | { CH_XID7_PENDING3, CTC_EVENT_START, ctcm_action_nop }, | |
1965 | { CH_XID7_PENDING3, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1966 | { CH_XID7_PENDING3, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1967 | { CH_XID7_PENDING3, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1968 | { CH_XID7_PENDING3, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1969 | { CH_XID7_PENDING3, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1970 | { CH_XID7_PENDING3, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1971 | { CH_XID7_PENDING3, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1972 | { CH_XID7_PENDING3, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1973 | ||
1974 | { CH_XID7_PENDING4, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1975 | { CH_XID7_PENDING4, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1976 | { CH_XID7_PENDING4, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1977 | { CH_XID7_PENDING4, CTC_EVENT_START, ctcm_action_nop }, | |
1978 | { CH_XID7_PENDING4, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1979 | { CH_XID7_PENDING4, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1980 | { CH_XID7_PENDING4, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1981 | { CH_XID7_PENDING4, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1982 | { CH_XID7_PENDING4, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1983 | { CH_XID7_PENDING4, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1984 | { CH_XID7_PENDING4, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1985 | { CH_XID7_PENDING4, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1986 | ||
1987 | { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1988 | { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop }, | |
1989 | { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1990 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc }, | |
1991 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail }, | |
1992 | { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1993 | { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1994 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1995 | ||
1996 | { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1997 | { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop }, | |
1998 | { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle }, | |
1999 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr }, | |
2000 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr }, | |
2001 | { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr }, | |
2002 | { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2003 | { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2004 | { CTC_STATE_TXINIT, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep }, | |
2005 | ||
2006 | { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2007 | { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop }, | |
2008 | { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio }, | |
2009 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_fail }, | |
2010 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail }, | |
2011 | { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2012 | { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2013 | { CTC_STATE_TXIDLE, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep }, | |
2014 | ||
2015 | { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop }, | |
2016 | { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart }, | |
2017 | { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped }, | |
2018 | { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, | |
2019 | { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, | |
2020 | { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2021 | { CTC_STATE_TERM, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
2022 | { CTC_STATE_TERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2023 | ||
2024 | { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2025 | { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart }, | |
2026 | { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, | |
2027 | { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, | |
2028 | { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, | |
2029 | { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2030 | { CTC_STATE_DTERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2031 | ||
2032 | { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2033 | { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop }, | |
2034 | { CTC_STATE_TX, CTC_EVENT_FINSTAT, ctcmpc_chx_txdone }, | |
2035 | { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_fail }, | |
2036 | { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_fail }, | |
2037 | { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry }, | |
2038 | { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2039 | { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2040 | { CTC_STATE_TX, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep }, | |
2041 | { CTC_STATE_TX, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
2042 | ||
2043 | { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2044 | { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2045 | { CTC_STATE_TXERR, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2046 | { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2047 | { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2048 | }; | |
2049 | ||
2050 | int mpc_ch_fsm_len = ARRAY_SIZE(ctcmpc_ch_fsm); | |
2051 | ||
2052 | /* | |
2053 | * Actions for interface - statemachine. | |
2054 | */ | |
2055 | ||
2056 | /** | |
2057 | * Startup channels by sending CTC_EVENT_START to each channel. | |
2058 | * | |
2059 | * fi An instance of an interface statemachine. | |
2060 | * event The event, just happened. | |
2061 | * arg Generic pointer, casted from struct net_device * upon call. | |
2062 | */ | |
2063 | static void dev_action_start(fsm_instance *fi, int event, void *arg) | |
2064 | { | |
2065 | struct net_device *dev = arg; | |
261893d3 | 2066 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
2067 | int direction; |
2068 | ||
2069 | CTCMY_DBF_DEV_NAME(SETUP, dev, ""); | |
2070 | ||
2071 | fsm_deltimer(&priv->restart_timer); | |
2072 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX); | |
2073 | if (IS_MPC(priv)) | |
2074 | priv->mpcg->channels_terminating = 0; | |
3c09e264 | 2075 | for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) { |
293d984f PT |
2076 | struct channel *ch = priv->channel[direction]; |
2077 | fsm_event(ch->fsm, CTC_EVENT_START, ch); | |
2078 | } | |
2079 | } | |
2080 | ||
2081 | /** | |
2082 | * Shutdown channels by sending CTC_EVENT_STOP to each channel. | |
2083 | * | |
2084 | * fi An instance of an interface statemachine. | |
2085 | * event The event, just happened. | |
2086 | * arg Generic pointer, casted from struct net_device * upon call. | |
2087 | */ | |
2088 | static void dev_action_stop(fsm_instance *fi, int event, void *arg) | |
2089 | { | |
2090 | int direction; | |
2091 | struct net_device *dev = arg; | |
261893d3 | 2092 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
2093 | |
2094 | CTCMY_DBF_DEV_NAME(SETUP, dev, ""); | |
2095 | ||
2096 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX); | |
3c09e264 | 2097 | for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) { |
293d984f PT |
2098 | struct channel *ch = priv->channel[direction]; |
2099 | fsm_event(ch->fsm, CTC_EVENT_STOP, ch); | |
2100 | ch->th_seq_num = 0x00; | |
aa3f2cb6 PT |
2101 | CTCM_PR_DEBUG("%s: CH_th_seq= %08x\n", |
2102 | __func__, ch->th_seq_num); | |
293d984f PT |
2103 | } |
2104 | if (IS_MPC(priv)) | |
2105 | fsm_newstate(priv->mpcg->fsm, MPCG_STATE_RESET); | |
2106 | } | |
2107 | ||
2108 | static void dev_action_restart(fsm_instance *fi, int event, void *arg) | |
2109 | { | |
2110 | int restart_timer; | |
2111 | struct net_device *dev = arg; | |
261893d3 | 2112 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
2113 | |
2114 | CTCMY_DBF_DEV_NAME(TRACE, dev, ""); | |
2115 | ||
2116 | if (IS_MPC(priv)) { | |
293d984f PT |
2117 | restart_timer = CTCM_TIME_1_SEC; |
2118 | } else { | |
293d984f PT |
2119 | restart_timer = CTCM_TIME_5_SEC; |
2120 | } | |
2a7c6f2c | 2121 | dev_info(&dev->dev, "Restarting device\n"); |
293d984f PT |
2122 | |
2123 | dev_action_stop(fi, event, arg); | |
2124 | fsm_event(priv->fsm, DEV_EVENT_STOP, dev); | |
2125 | if (IS_MPC(priv)) | |
2126 | fsm_newstate(priv->mpcg->fsm, MPCG_STATE_RESET); | |
2127 | ||
2128 | /* going back into start sequence too quickly can */ | |
2129 | /* result in the other side becoming unreachable due */ | |
2130 | /* to sense reported when IO is aborted */ | |
2131 | fsm_addtimer(&priv->restart_timer, restart_timer, | |
2132 | DEV_EVENT_START, dev); | |
2133 | } | |
2134 | ||
2135 | /** | |
2136 | * Called from channel statemachine | |
2137 | * when a channel is up and running. | |
2138 | * | |
2139 | * fi An instance of an interface statemachine. | |
2140 | * event The event, just happened. | |
2141 | * arg Generic pointer, casted from struct net_device * upon call. | |
2142 | */ | |
2143 | static void dev_action_chup(fsm_instance *fi, int event, void *arg) | |
2144 | { | |
2145 | struct net_device *dev = arg; | |
261893d3 | 2146 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 2147 | int dev_stat = fsm_getstate(fi); |
293d984f | 2148 | |
aa3f2cb6 PT |
2149 | CTCM_DBF_TEXT_(SETUP, CTC_DBF_NOTICE, |
2150 | "%s(%s): priv = %p [%d,%d]\n ", CTCM_FUNTAIL, | |
261893d3 | 2151 | dev->name, dev->ml_priv, dev_stat, event); |
293d984f PT |
2152 | |
2153 | switch (fsm_getstate(fi)) { | |
2154 | case DEV_STATE_STARTWAIT_RXTX: | |
2155 | if (event == DEV_EVENT_RXUP) | |
2156 | fsm_newstate(fi, DEV_STATE_STARTWAIT_TX); | |
2157 | else | |
2158 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RX); | |
2159 | break; | |
2160 | case DEV_STATE_STARTWAIT_RX: | |
2161 | if (event == DEV_EVENT_RXUP) { | |
2162 | fsm_newstate(fi, DEV_STATE_RUNNING); | |
2a7c6f2c PT |
2163 | dev_info(&dev->dev, |
2164 | "Connected with remote side\n"); | |
293d984f PT |
2165 | ctcm_clear_busy(dev); |
2166 | } | |
2167 | break; | |
2168 | case DEV_STATE_STARTWAIT_TX: | |
2169 | if (event == DEV_EVENT_TXUP) { | |
2170 | fsm_newstate(fi, DEV_STATE_RUNNING); | |
2a7c6f2c PT |
2171 | dev_info(&dev->dev, |
2172 | "Connected with remote side\n"); | |
293d984f PT |
2173 | ctcm_clear_busy(dev); |
2174 | } | |
2175 | break; | |
2176 | case DEV_STATE_STOPWAIT_TX: | |
2177 | if (event == DEV_EVENT_RXUP) | |
2178 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX); | |
2179 | break; | |
2180 | case DEV_STATE_STOPWAIT_RX: | |
2181 | if (event == DEV_EVENT_TXUP) | |
2182 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX); | |
2183 | break; | |
2184 | } | |
2185 | ||
2186 | if (IS_MPC(priv)) { | |
2187 | if (event == DEV_EVENT_RXUP) | |
3c09e264 UB |
2188 | mpc_channel_action(priv->channel[CTCM_READ], |
2189 | CTCM_READ, MPC_CHANNEL_ADD); | |
293d984f | 2190 | else |
3c09e264 UB |
2191 | mpc_channel_action(priv->channel[CTCM_WRITE], |
2192 | CTCM_WRITE, MPC_CHANNEL_ADD); | |
293d984f PT |
2193 | } |
2194 | } | |
2195 | ||
2196 | /** | |
2197 | * Called from device statemachine | |
2198 | * when a channel has been shutdown. | |
2199 | * | |
2200 | * fi An instance of an interface statemachine. | |
2201 | * event The event, just happened. | |
2202 | * arg Generic pointer, casted from struct net_device * upon call. | |
2203 | */ | |
2204 | static void dev_action_chdown(fsm_instance *fi, int event, void *arg) | |
2205 | { | |
2206 | ||
2207 | struct net_device *dev = arg; | |
261893d3 | 2208 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
2209 | |
2210 | CTCMY_DBF_DEV_NAME(SETUP, dev, ""); | |
2211 | ||
2212 | switch (fsm_getstate(fi)) { | |
2213 | case DEV_STATE_RUNNING: | |
2214 | if (event == DEV_EVENT_TXDOWN) | |
2215 | fsm_newstate(fi, DEV_STATE_STARTWAIT_TX); | |
2216 | else | |
2217 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RX); | |
2218 | break; | |
2219 | case DEV_STATE_STARTWAIT_RX: | |
2220 | if (event == DEV_EVENT_TXDOWN) | |
2221 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX); | |
2222 | break; | |
2223 | case DEV_STATE_STARTWAIT_TX: | |
2224 | if (event == DEV_EVENT_RXDOWN) | |
2225 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX); | |
2226 | break; | |
2227 | case DEV_STATE_STOPWAIT_RXTX: | |
2228 | if (event == DEV_EVENT_TXDOWN) | |
2229 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RX); | |
2230 | else | |
2231 | fsm_newstate(fi, DEV_STATE_STOPWAIT_TX); | |
2232 | break; | |
2233 | case DEV_STATE_STOPWAIT_RX: | |
2234 | if (event == DEV_EVENT_RXDOWN) | |
2235 | fsm_newstate(fi, DEV_STATE_STOPPED); | |
2236 | break; | |
2237 | case DEV_STATE_STOPWAIT_TX: | |
2238 | if (event == DEV_EVENT_TXDOWN) | |
2239 | fsm_newstate(fi, DEV_STATE_STOPPED); | |
2240 | break; | |
2241 | } | |
2242 | if (IS_MPC(priv)) { | |
2243 | if (event == DEV_EVENT_RXDOWN) | |
3c09e264 UB |
2244 | mpc_channel_action(priv->channel[CTCM_READ], |
2245 | CTCM_READ, MPC_CHANNEL_REMOVE); | |
293d984f | 2246 | else |
3c09e264 UB |
2247 | mpc_channel_action(priv->channel[CTCM_WRITE], |
2248 | CTCM_WRITE, MPC_CHANNEL_REMOVE); | |
293d984f PT |
2249 | } |
2250 | } | |
2251 | ||
2252 | const fsm_node dev_fsm[] = { | |
2253 | { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start }, | |
2254 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_START, dev_action_start }, | |
2255 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2256 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2257 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart }, | |
2258 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_START, dev_action_start }, | |
2259 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXUP, dev_action_chup }, | |
2260 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_TXUP, dev_action_chup }, | |
2261 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2262 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RESTART, dev_action_restart }, | |
2263 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_START, dev_action_start }, | |
2264 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RXUP, dev_action_chup }, | |
2265 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXUP, dev_action_chup }, | |
2266 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2267 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RESTART, dev_action_restart }, | |
2268 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_STOP, dev_action_stop }, | |
2269 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXUP, dev_action_chup }, | |
2270 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXUP, dev_action_chup }, | |
2271 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2272 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2273 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart }, | |
2274 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_STOP, dev_action_stop }, | |
2275 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXUP, dev_action_chup }, | |
2276 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_TXUP, dev_action_chup }, | |
2277 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2278 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RESTART, dev_action_restart }, | |
2279 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_STOP, dev_action_stop }, | |
2280 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RXUP, dev_action_chup }, | |
2281 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXUP, dev_action_chup }, | |
2282 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2283 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RESTART, dev_action_restart }, | |
2284 | { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop }, | |
2285 | { DEV_STATE_RUNNING, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2286 | { DEV_STATE_RUNNING, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2287 | { DEV_STATE_RUNNING, DEV_EVENT_TXUP, ctcm_action_nop }, | |
2288 | { DEV_STATE_RUNNING, DEV_EVENT_RXUP, ctcm_action_nop }, | |
2289 | { DEV_STATE_RUNNING, DEV_EVENT_RESTART, dev_action_restart }, | |
2290 | }; | |
2291 | ||
2292 | int dev_fsm_len = ARRAY_SIZE(dev_fsm); | |
2293 | ||
2294 | /* --- This is the END my friend --- */ | |
2295 |