Commit | Line | Data |
---|---|---|
293d984f | 1 | /* |
293d984f PT |
2 | * Copyright IBM Corp. 2001, 2007 |
3 | * Authors: Fritz Elfert (felfert@millenux.com) | |
4 | * Peter Tiedemann (ptiedem@de.ibm.com) | |
5 | * MPC additions : | |
6 | * Belinda Thompson (belindat@us.ibm.com) | |
7 | * Andy Richter (richtera@us.ibm.com) | |
8 | */ | |
9 | ||
10 | #undef DEBUG | |
11 | #undef DEBUGDATA | |
12 | #undef DEBUGCCW | |
13 | ||
2a7c6f2c PT |
14 | #define KMSG_COMPONENT "ctcm" |
15 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
16 | ||
293d984f PT |
17 | #include <linux/module.h> |
18 | #include <linux/init.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/types.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/timer.h> | |
25 | #include <linux/bitops.h> | |
26 | ||
27 | #include <linux/signal.h> | |
28 | #include <linux/string.h> | |
29 | ||
30 | #include <linux/ip.h> | |
31 | #include <linux/if_arp.h> | |
32 | #include <linux/tcp.h> | |
33 | #include <linux/skbuff.h> | |
34 | #include <linux/ctype.h> | |
35 | #include <net/dst.h> | |
36 | ||
37 | #include <linux/io.h> | |
38 | #include <asm/ccwdev.h> | |
39 | #include <asm/ccwgroup.h> | |
40 | #include <linux/uaccess.h> | |
41 | ||
42 | #include <asm/idals.h> | |
43 | ||
44 | #include "fsm.h" | |
293d984f PT |
45 | |
46 | #include "ctcm_dbug.h" | |
47 | #include "ctcm_main.h" | |
48 | #include "ctcm_fsms.h" | |
49 | ||
50 | const char *dev_state_names[] = { | |
51 | [DEV_STATE_STOPPED] = "Stopped", | |
52 | [DEV_STATE_STARTWAIT_RXTX] = "StartWait RXTX", | |
53 | [DEV_STATE_STARTWAIT_RX] = "StartWait RX", | |
54 | [DEV_STATE_STARTWAIT_TX] = "StartWait TX", | |
55 | [DEV_STATE_STOPWAIT_RXTX] = "StopWait RXTX", | |
56 | [DEV_STATE_STOPWAIT_RX] = "StopWait RX", | |
57 | [DEV_STATE_STOPWAIT_TX] = "StopWait TX", | |
58 | [DEV_STATE_RUNNING] = "Running", | |
59 | }; | |
60 | ||
61 | const char *dev_event_names[] = { | |
62 | [DEV_EVENT_START] = "Start", | |
63 | [DEV_EVENT_STOP] = "Stop", | |
64 | [DEV_EVENT_RXUP] = "RX up", | |
65 | [DEV_EVENT_TXUP] = "TX up", | |
66 | [DEV_EVENT_RXDOWN] = "RX down", | |
67 | [DEV_EVENT_TXDOWN] = "TX down", | |
68 | [DEV_EVENT_RESTART] = "Restart", | |
69 | }; | |
70 | ||
71 | const char *ctc_ch_event_names[] = { | |
72 | [CTC_EVENT_IO_SUCCESS] = "ccw_device success", | |
73 | [CTC_EVENT_IO_EBUSY] = "ccw_device busy", | |
74 | [CTC_EVENT_IO_ENODEV] = "ccw_device enodev", | |
75 | [CTC_EVENT_IO_UNKNOWN] = "ccw_device unknown", | |
76 | [CTC_EVENT_ATTNBUSY] = "Status ATTN & BUSY", | |
77 | [CTC_EVENT_ATTN] = "Status ATTN", | |
78 | [CTC_EVENT_BUSY] = "Status BUSY", | |
79 | [CTC_EVENT_UC_RCRESET] = "Unit check remote reset", | |
80 | [CTC_EVENT_UC_RSRESET] = "Unit check remote system reset", | |
81 | [CTC_EVENT_UC_TXTIMEOUT] = "Unit check TX timeout", | |
82 | [CTC_EVENT_UC_TXPARITY] = "Unit check TX parity", | |
83 | [CTC_EVENT_UC_HWFAIL] = "Unit check Hardware failure", | |
84 | [CTC_EVENT_UC_RXPARITY] = "Unit check RX parity", | |
85 | [CTC_EVENT_UC_ZERO] = "Unit check ZERO", | |
86 | [CTC_EVENT_UC_UNKNOWN] = "Unit check Unknown", | |
87 | [CTC_EVENT_SC_UNKNOWN] = "SubChannel check Unknown", | |
88 | [CTC_EVENT_MC_FAIL] = "Machine check failure", | |
89 | [CTC_EVENT_MC_GOOD] = "Machine check operational", | |
90 | [CTC_EVENT_IRQ] = "IRQ normal", | |
91 | [CTC_EVENT_FINSTAT] = "IRQ final", | |
92 | [CTC_EVENT_TIMER] = "Timer", | |
93 | [CTC_EVENT_START] = "Start", | |
94 | [CTC_EVENT_STOP] = "Stop", | |
95 | /* | |
96 | * additional MPC events | |
97 | */ | |
98 | [CTC_EVENT_SEND_XID] = "XID Exchange", | |
99 | [CTC_EVENT_RSWEEP_TIMER] = "MPC Group Sweep Timer", | |
100 | }; | |
101 | ||
102 | const char *ctc_ch_state_names[] = { | |
103 | [CTC_STATE_IDLE] = "Idle", | |
104 | [CTC_STATE_STOPPED] = "Stopped", | |
105 | [CTC_STATE_STARTWAIT] = "StartWait", | |
106 | [CTC_STATE_STARTRETRY] = "StartRetry", | |
107 | [CTC_STATE_SETUPWAIT] = "SetupWait", | |
108 | [CTC_STATE_RXINIT] = "RX init", | |
109 | [CTC_STATE_TXINIT] = "TX init", | |
110 | [CTC_STATE_RX] = "RX", | |
111 | [CTC_STATE_TX] = "TX", | |
112 | [CTC_STATE_RXIDLE] = "RX idle", | |
113 | [CTC_STATE_TXIDLE] = "TX idle", | |
114 | [CTC_STATE_RXERR] = "RX error", | |
115 | [CTC_STATE_TXERR] = "TX error", | |
116 | [CTC_STATE_TERM] = "Terminating", | |
117 | [CTC_STATE_DTERM] = "Restarting", | |
118 | [CTC_STATE_NOTOP] = "Not operational", | |
119 | /* | |
120 | * additional MPC states | |
121 | */ | |
122 | [CH_XID0_PENDING] = "Pending XID0 Start", | |
123 | [CH_XID0_INPROGRESS] = "In XID0 Negotiations ", | |
124 | [CH_XID7_PENDING] = "Pending XID7 P1 Start", | |
125 | [CH_XID7_PENDING1] = "Active XID7 P1 Exchange ", | |
126 | [CH_XID7_PENDING2] = "Pending XID7 P2 Start ", | |
127 | [CH_XID7_PENDING3] = "Active XID7 P2 Exchange ", | |
128 | [CH_XID7_PENDING4] = "XID7 Complete - Pending READY ", | |
129 | }; | |
130 | ||
131 | static void ctcm_action_nop(fsm_instance *fi, int event, void *arg); | |
132 | ||
133 | /* | |
134 | * ----- static ctcm actions for channel statemachine ----- | |
135 | * | |
136 | */ | |
137 | static void chx_txdone(fsm_instance *fi, int event, void *arg); | |
138 | static void chx_rx(fsm_instance *fi, int event, void *arg); | |
139 | static void chx_rxidle(fsm_instance *fi, int event, void *arg); | |
140 | static void chx_firstio(fsm_instance *fi, int event, void *arg); | |
141 | static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg); | |
142 | static void ctcm_chx_start(fsm_instance *fi, int event, void *arg); | |
143 | static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg); | |
144 | static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg); | |
145 | static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg); | |
146 | static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg); | |
147 | static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg); | |
148 | static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg); | |
149 | static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg); | |
150 | static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg); | |
151 | static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg); | |
152 | static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg); | |
153 | static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg); | |
154 | static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg); | |
155 | ||
156 | /* | |
157 | * ----- static ctcmpc actions for ctcmpc channel statemachine ----- | |
158 | * | |
159 | */ | |
160 | static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg); | |
161 | static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg); | |
162 | static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg); | |
163 | /* shared : | |
164 | static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg); | |
165 | static void ctcm_chx_start(fsm_instance *fi, int event, void *arg); | |
166 | static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg); | |
167 | static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg); | |
168 | static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg); | |
169 | static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg); | |
170 | static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg); | |
171 | static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg); | |
172 | static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg); | |
173 | static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg); | |
174 | static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg); | |
175 | static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg); | |
176 | static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg); | |
177 | static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg); | |
178 | */ | |
179 | static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg); | |
180 | static void ctcmpc_chx_attnbusy(fsm_instance *, int, void *); | |
181 | static void ctcmpc_chx_resend(fsm_instance *, int, void *); | |
182 | static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg); | |
183 | ||
184 | /** | |
25985edc | 185 | * Check return code of a preceding ccw_device call, halt_IO etc... |
293d984f PT |
186 | * |
187 | * ch : The channel, the error belongs to. | |
188 | * Returns the error code (!= 0) to inspect. | |
189 | */ | |
190 | void ctcm_ccw_check_rc(struct channel *ch, int rc, char *msg) | |
191 | { | |
192 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, | |
2a7c6f2c PT |
193 | "%s(%s): %s: %04x\n", |
194 | CTCM_FUNTAIL, ch->id, msg, rc); | |
293d984f PT |
195 | switch (rc) { |
196 | case -EBUSY: | |
2a7c6f2c PT |
197 | pr_info("%s: The communication peer is busy\n", |
198 | ch->id); | |
293d984f PT |
199 | fsm_event(ch->fsm, CTC_EVENT_IO_EBUSY, ch); |
200 | break; | |
201 | case -ENODEV: | |
2a7c6f2c PT |
202 | pr_err("%s: The specified target device is not valid\n", |
203 | ch->id); | |
293d984f PT |
204 | fsm_event(ch->fsm, CTC_EVENT_IO_ENODEV, ch); |
205 | break; | |
206 | default: | |
2a7c6f2c PT |
207 | pr_err("An I/O operation resulted in error %04x\n", |
208 | rc); | |
293d984f PT |
209 | fsm_event(ch->fsm, CTC_EVENT_IO_UNKNOWN, ch); |
210 | } | |
211 | } | |
212 | ||
213 | void ctcm_purge_skb_queue(struct sk_buff_head *q) | |
214 | { | |
215 | struct sk_buff *skb; | |
216 | ||
aa3f2cb6 | 217 | CTCM_DBF_TEXT(TRACE, CTC_DBF_DEBUG, __func__); |
293d984f PT |
218 | |
219 | while ((skb = skb_dequeue(q))) { | |
220 | atomic_dec(&skb->users); | |
221 | dev_kfree_skb_any(skb); | |
222 | } | |
223 | } | |
224 | ||
225 | /** | |
226 | * NOP action for statemachines | |
227 | */ | |
228 | static void ctcm_action_nop(fsm_instance *fi, int event, void *arg) | |
229 | { | |
230 | } | |
231 | ||
232 | /* | |
233 | * Actions for channel - statemachines. | |
234 | */ | |
235 | ||
236 | /** | |
237 | * Normal data has been send. Free the corresponding | |
238 | * skb (it's in io_queue), reset dev->tbusy and | |
239 | * revert to idle state. | |
240 | * | |
241 | * fi An instance of a channel statemachine. | |
242 | * event The event, just happened. | |
243 | * arg Generic pointer, casted from channel * upon call. | |
244 | */ | |
245 | static void chx_txdone(fsm_instance *fi, int event, void *arg) | |
246 | { | |
247 | struct channel *ch = arg; | |
248 | struct net_device *dev = ch->netdev; | |
261893d3 | 249 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
250 | struct sk_buff *skb; |
251 | int first = 1; | |
252 | int i; | |
253 | unsigned long duration; | |
254 | struct timespec done_stamp = current_kernel_time(); /* xtime */ | |
255 | ||
aa3f2cb6 PT |
256 | CTCM_PR_DEBUG("%s(%s): %s\n", __func__, ch->id, dev->name); |
257 | ||
293d984f PT |
258 | duration = |
259 | (done_stamp.tv_sec - ch->prof.send_stamp.tv_sec) * 1000000 + | |
260 | (done_stamp.tv_nsec - ch->prof.send_stamp.tv_nsec) / 1000; | |
261 | if (duration > ch->prof.tx_time) | |
262 | ch->prof.tx_time = duration; | |
263 | ||
23d805b6 | 264 | if (ch->irb->scsw.cmd.count != 0) |
aa3f2cb6 PT |
265 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, |
266 | "%s(%s): TX not complete, remaining %d bytes", | |
267 | CTCM_FUNTAIL, dev->name, ch->irb->scsw.cmd.count); | |
293d984f PT |
268 | fsm_deltimer(&ch->timer); |
269 | while ((skb = skb_dequeue(&ch->io_queue))) { | |
270 | priv->stats.tx_packets++; | |
271 | priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH; | |
272 | if (first) { | |
273 | priv->stats.tx_bytes += 2; | |
274 | first = 0; | |
275 | } | |
276 | atomic_dec(&skb->users); | |
277 | dev_kfree_skb_irq(skb); | |
278 | } | |
279 | spin_lock(&ch->collect_lock); | |
280 | clear_normalized_cda(&ch->ccw[4]); | |
281 | if (ch->collect_len > 0) { | |
282 | int rc; | |
283 | ||
284 | if (ctcm_checkalloc_buffer(ch)) { | |
285 | spin_unlock(&ch->collect_lock); | |
286 | return; | |
287 | } | |
288 | ch->trans_skb->data = ch->trans_skb_data; | |
289 | skb_reset_tail_pointer(ch->trans_skb); | |
290 | ch->trans_skb->len = 0; | |
291 | if (ch->prof.maxmulti < (ch->collect_len + 2)) | |
292 | ch->prof.maxmulti = ch->collect_len + 2; | |
293 | if (ch->prof.maxcqueue < skb_queue_len(&ch->collect_queue)) | |
294 | ch->prof.maxcqueue = skb_queue_len(&ch->collect_queue); | |
295 | *((__u16 *)skb_put(ch->trans_skb, 2)) = ch->collect_len + 2; | |
296 | i = 0; | |
297 | while ((skb = skb_dequeue(&ch->collect_queue))) { | |
298 | skb_copy_from_linear_data(skb, | |
299 | skb_put(ch->trans_skb, skb->len), skb->len); | |
300 | priv->stats.tx_packets++; | |
301 | priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH; | |
302 | atomic_dec(&skb->users); | |
303 | dev_kfree_skb_irq(skb); | |
304 | i++; | |
305 | } | |
306 | ch->collect_len = 0; | |
307 | spin_unlock(&ch->collect_lock); | |
308 | ch->ccw[1].count = ch->trans_skb->len; | |
309 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
310 | ch->prof.send_stamp = current_kernel_time(); /* xtime */ | |
311 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
312 | (unsigned long)ch, 0xff, 0); | |
313 | ch->prof.doios_multi++; | |
314 | if (rc != 0) { | |
315 | priv->stats.tx_dropped += i; | |
316 | priv->stats.tx_errors += i; | |
317 | fsm_deltimer(&ch->timer); | |
318 | ctcm_ccw_check_rc(ch, rc, "chained TX"); | |
319 | } | |
320 | } else { | |
321 | spin_unlock(&ch->collect_lock); | |
322 | fsm_newstate(fi, CTC_STATE_TXIDLE); | |
323 | } | |
324 | ctcm_clear_busy_do(dev); | |
325 | } | |
326 | ||
327 | /** | |
328 | * Initial data is sent. | |
329 | * Notify device statemachine that we are up and | |
330 | * running. | |
331 | * | |
332 | * fi An instance of a channel statemachine. | |
333 | * event The event, just happened. | |
334 | * arg Generic pointer, casted from channel * upon call. | |
335 | */ | |
336 | void ctcm_chx_txidle(fsm_instance *fi, int event, void *arg) | |
337 | { | |
338 | struct channel *ch = arg; | |
339 | struct net_device *dev = ch->netdev; | |
261893d3 | 340 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 341 | |
aa3f2cb6 PT |
342 | CTCM_PR_DEBUG("%s(%s): %s\n", __func__, ch->id, dev->name); |
343 | ||
293d984f PT |
344 | fsm_deltimer(&ch->timer); |
345 | fsm_newstate(fi, CTC_STATE_TXIDLE); | |
346 | fsm_event(priv->fsm, DEV_EVENT_TXUP, ch->netdev); | |
347 | } | |
348 | ||
349 | /** | |
350 | * Got normal data, check for sanity, queue it up, allocate new buffer | |
351 | * trigger bottom half, and initiate next read. | |
352 | * | |
353 | * fi An instance of a channel statemachine. | |
354 | * event The event, just happened. | |
355 | * arg Generic pointer, casted from channel * upon call. | |
356 | */ | |
357 | static void chx_rx(fsm_instance *fi, int event, void *arg) | |
358 | { | |
359 | struct channel *ch = arg; | |
360 | struct net_device *dev = ch->netdev; | |
261893d3 | 361 | struct ctcm_priv *priv = dev->ml_priv; |
23d805b6 | 362 | int len = ch->max_bufsize - ch->irb->scsw.cmd.count; |
293d984f PT |
363 | struct sk_buff *skb = ch->trans_skb; |
364 | __u16 block_len = *((__u16 *)skb->data); | |
365 | int check_len; | |
366 | int rc; | |
367 | ||
368 | fsm_deltimer(&ch->timer); | |
369 | if (len < 8) { | |
aa3f2cb6 PT |
370 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
371 | "%s(%s): got packet with length %d < 8\n", | |
372 | CTCM_FUNTAIL, dev->name, len); | |
293d984f PT |
373 | priv->stats.rx_dropped++; |
374 | priv->stats.rx_length_errors++; | |
375 | goto again; | |
376 | } | |
377 | if (len > ch->max_bufsize) { | |
aa3f2cb6 PT |
378 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
379 | "%s(%s): got packet with length %d > %d\n", | |
380 | CTCM_FUNTAIL, dev->name, len, ch->max_bufsize); | |
293d984f PT |
381 | priv->stats.rx_dropped++; |
382 | priv->stats.rx_length_errors++; | |
383 | goto again; | |
384 | } | |
385 | ||
386 | /* | |
387 | * VM TCP seems to have a bug sending 2 trailing bytes of garbage. | |
388 | */ | |
389 | switch (ch->protocol) { | |
390 | case CTCM_PROTO_S390: | |
391 | case CTCM_PROTO_OS390: | |
392 | check_len = block_len + 2; | |
393 | break; | |
394 | default: | |
395 | check_len = block_len; | |
396 | break; | |
397 | } | |
398 | if ((len < block_len) || (len > check_len)) { | |
aa3f2cb6 PT |
399 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
400 | "%s(%s): got block length %d != rx length %d\n", | |
401 | CTCM_FUNTAIL, dev->name, block_len, len); | |
293d984f PT |
402 | if (do_debug) |
403 | ctcmpc_dump_skb(skb, 0); | |
404 | ||
405 | *((__u16 *)skb->data) = len; | |
406 | priv->stats.rx_dropped++; | |
407 | priv->stats.rx_length_errors++; | |
408 | goto again; | |
409 | } | |
fb8585fc RK |
410 | if (block_len > 2) { |
411 | *((__u16 *)skb->data) = block_len - 2; | |
293d984f PT |
412 | ctcm_unpack_skb(ch, skb); |
413 | } | |
414 | again: | |
415 | skb->data = ch->trans_skb_data; | |
416 | skb_reset_tail_pointer(skb); | |
417 | skb->len = 0; | |
418 | if (ctcm_checkalloc_buffer(ch)) | |
419 | return; | |
420 | ch->ccw[1].count = ch->max_bufsize; | |
421 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
422 | (unsigned long)ch, 0xff, 0); | |
423 | if (rc != 0) | |
424 | ctcm_ccw_check_rc(ch, rc, "normal RX"); | |
425 | } | |
426 | ||
427 | /** | |
428 | * Initialize connection by sending a __u16 of value 0. | |
429 | * | |
430 | * fi An instance of a channel statemachine. | |
431 | * event The event, just happened. | |
432 | * arg Generic pointer, casted from channel * upon call. | |
433 | */ | |
434 | static void chx_firstio(fsm_instance *fi, int event, void *arg) | |
435 | { | |
293d984f | 436 | int rc; |
aa3f2cb6 PT |
437 | struct channel *ch = arg; |
438 | int fsmstate = fsm_getstate(fi); | |
293d984f | 439 | |
aa3f2cb6 PT |
440 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
441 | "%s(%s) : %02x", | |
442 | CTCM_FUNTAIL, ch->id, fsmstate); | |
293d984f | 443 | |
aa3f2cb6 PT |
444 | ch->sense_rc = 0; /* reset unit check report control */ |
445 | if (fsmstate == CTC_STATE_TXIDLE) | |
446 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, | |
447 | "%s(%s): remote side issued READ?, init.\n", | |
448 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
449 | fsm_deltimer(&ch->timer); |
450 | if (ctcm_checkalloc_buffer(ch)) | |
451 | return; | |
aa3f2cb6 | 452 | if ((fsmstate == CTC_STATE_SETUPWAIT) && |
293d984f PT |
453 | (ch->protocol == CTCM_PROTO_OS390)) { |
454 | /* OS/390 resp. z/OS */ | |
3c09e264 | 455 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
293d984f PT |
456 | *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN; |
457 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, | |
458 | CTC_EVENT_TIMER, ch); | |
459 | chx_rxidle(fi, event, arg); | |
460 | } else { | |
461 | struct net_device *dev = ch->netdev; | |
261893d3 | 462 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
463 | fsm_newstate(fi, CTC_STATE_TXIDLE); |
464 | fsm_event(priv->fsm, DEV_EVENT_TXUP, dev); | |
465 | } | |
466 | return; | |
467 | } | |
293d984f PT |
468 | /* |
469 | * Don't setup a timer for receiving the initial RX frame | |
470 | * if in compatibility mode, since VM TCP delays the initial | |
471 | * frame until it has some data to send. | |
472 | */ | |
3c09e264 | 473 | if ((CHANNEL_DIRECTION(ch->flags) == CTCM_WRITE) || |
293d984f PT |
474 | (ch->protocol != CTCM_PROTO_S390)) |
475 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
476 | ||
477 | *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN; | |
478 | ch->ccw[1].count = 2; /* Transfer only length */ | |
479 | ||
3c09e264 | 480 | fsm_newstate(fi, (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) |
293d984f PT |
481 | ? CTC_STATE_RXINIT : CTC_STATE_TXINIT); |
482 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
483 | (unsigned long)ch, 0xff, 0); | |
484 | if (rc != 0) { | |
485 | fsm_deltimer(&ch->timer); | |
486 | fsm_newstate(fi, CTC_STATE_SETUPWAIT); | |
487 | ctcm_ccw_check_rc(ch, rc, "init IO"); | |
488 | } | |
489 | /* | |
490 | * If in compatibility mode since we don't setup a timer, we | |
491 | * also signal RX channel up immediately. This enables us | |
492 | * to send packets early which in turn usually triggers some | |
493 | * reply from VM TCP which brings up the RX channel to it's | |
494 | * final state. | |
495 | */ | |
3c09e264 | 496 | if ((CHANNEL_DIRECTION(ch->flags) == CTCM_READ) && |
293d984f PT |
497 | (ch->protocol == CTCM_PROTO_S390)) { |
498 | struct net_device *dev = ch->netdev; | |
261893d3 | 499 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
500 | fsm_event(priv->fsm, DEV_EVENT_RXUP, dev); |
501 | } | |
502 | } | |
503 | ||
504 | /** | |
505 | * Got initial data, check it. If OK, | |
506 | * notify device statemachine that we are up and | |
507 | * running. | |
508 | * | |
509 | * fi An instance of a channel statemachine. | |
510 | * event The event, just happened. | |
511 | * arg Generic pointer, casted from channel * upon call. | |
512 | */ | |
513 | static void chx_rxidle(fsm_instance *fi, int event, void *arg) | |
514 | { | |
515 | struct channel *ch = arg; | |
516 | struct net_device *dev = ch->netdev; | |
261893d3 | 517 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
518 | __u16 buflen; |
519 | int rc; | |
520 | ||
293d984f PT |
521 | fsm_deltimer(&ch->timer); |
522 | buflen = *((__u16 *)ch->trans_skb->data); | |
aa3f2cb6 PT |
523 | CTCM_PR_DEBUG("%s: %s: Initial RX count = %d\n", |
524 | __func__, dev->name, buflen); | |
293d984f PT |
525 | |
526 | if (buflen >= CTCM_INITIAL_BLOCKLEN) { | |
527 | if (ctcm_checkalloc_buffer(ch)) | |
528 | return; | |
529 | ch->ccw[1].count = ch->max_bufsize; | |
530 | fsm_newstate(fi, CTC_STATE_RXIDLE); | |
531 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
532 | (unsigned long)ch, 0xff, 0); | |
533 | if (rc != 0) { | |
534 | fsm_newstate(fi, CTC_STATE_RXINIT); | |
535 | ctcm_ccw_check_rc(ch, rc, "initial RX"); | |
536 | } else | |
537 | fsm_event(priv->fsm, DEV_EVENT_RXUP, dev); | |
538 | } else { | |
aa3f2cb6 PT |
539 | CTCM_PR_DEBUG("%s: %s: Initial RX count %d not %d\n", |
540 | __func__, dev->name, | |
541 | buflen, CTCM_INITIAL_BLOCKLEN); | |
293d984f PT |
542 | chx_firstio(fi, event, arg); |
543 | } | |
544 | } | |
545 | ||
546 | /** | |
547 | * Set channel into extended mode. | |
548 | * | |
549 | * fi An instance of a channel statemachine. | |
550 | * event The event, just happened. | |
551 | * arg Generic pointer, casted from channel * upon call. | |
552 | */ | |
553 | static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg) | |
554 | { | |
555 | struct channel *ch = arg; | |
556 | int rc; | |
557 | unsigned long saveflags = 0; | |
558 | int timeout = CTCM_TIME_5_SEC; | |
559 | ||
560 | fsm_deltimer(&ch->timer); | |
561 | if (IS_MPC(ch)) { | |
562 | timeout = 1500; | |
aa3f2cb6 PT |
563 | CTCM_PR_DEBUG("enter %s: cp=%i ch=0x%p id=%s\n", |
564 | __func__, smp_processor_id(), ch, ch->id); | |
293d984f PT |
565 | } |
566 | fsm_addtimer(&ch->timer, timeout, CTC_EVENT_TIMER, ch); | |
567 | fsm_newstate(fi, CTC_STATE_SETUPWAIT); | |
aa3f2cb6 | 568 | CTCM_CCW_DUMP((char *)&ch->ccw[6], sizeof(struct ccw1) * 2); |
293d984f PT |
569 | |
570 | if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */ | |
571 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
572 | /* Such conditional locking is undeterministic in | |
573 | * static view. => ignore sparse warnings here. */ | |
574 | ||
575 | rc = ccw_device_start(ch->cdev, &ch->ccw[6], | |
576 | (unsigned long)ch, 0xff, 0); | |
577 | if (event == CTC_EVENT_TIMER) /* see above comments */ | |
578 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
579 | if (rc != 0) { | |
580 | fsm_deltimer(&ch->timer); | |
581 | fsm_newstate(fi, CTC_STATE_STARTWAIT); | |
582 | ctcm_ccw_check_rc(ch, rc, "set Mode"); | |
583 | } else | |
584 | ch->retry = 0; | |
585 | } | |
586 | ||
587 | /** | |
588 | * Setup channel. | |
589 | * | |
590 | * fi An instance of a channel statemachine. | |
591 | * event The event, just happened. | |
592 | * arg Generic pointer, casted from channel * upon call. | |
593 | */ | |
594 | static void ctcm_chx_start(fsm_instance *fi, int event, void *arg) | |
595 | { | |
aa3f2cb6 | 596 | struct channel *ch = arg; |
293d984f | 597 | unsigned long saveflags; |
aa3f2cb6 | 598 | int rc; |
293d984f | 599 | |
aa3f2cb6 | 600 | CTCM_DBF_TEXT_(SETUP, CTC_DBF_INFO, "%s(%s): %s", |
3c09e264 UB |
601 | CTCM_FUNTAIL, ch->id, |
602 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? "RX" : "TX"); | |
293d984f PT |
603 | |
604 | if (ch->trans_skb != NULL) { | |
605 | clear_normalized_cda(&ch->ccw[1]); | |
606 | dev_kfree_skb(ch->trans_skb); | |
607 | ch->trans_skb = NULL; | |
608 | } | |
3c09e264 | 609 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
293d984f PT |
610 | ch->ccw[1].cmd_code = CCW_CMD_READ; |
611 | ch->ccw[1].flags = CCW_FLAG_SLI; | |
612 | ch->ccw[1].count = 0; | |
613 | } else { | |
614 | ch->ccw[1].cmd_code = CCW_CMD_WRITE; | |
615 | ch->ccw[1].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
616 | ch->ccw[1].count = 0; | |
617 | } | |
618 | if (ctcm_checkalloc_buffer(ch)) { | |
aa3f2cb6 PT |
619 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, |
620 | "%s(%s): %s trans_skb alloc delayed " | |
621 | "until first transfer", | |
622 | CTCM_FUNTAIL, ch->id, | |
3c09e264 UB |
623 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? |
624 | "RX" : "TX"); | |
293d984f | 625 | } |
293d984f PT |
626 | ch->ccw[0].cmd_code = CCW_CMD_PREPARE; |
627 | ch->ccw[0].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
628 | ch->ccw[0].count = 0; | |
629 | ch->ccw[0].cda = 0; | |
630 | ch->ccw[2].cmd_code = CCW_CMD_NOOP; /* jointed CE + DE */ | |
631 | ch->ccw[2].flags = CCW_FLAG_SLI; | |
632 | ch->ccw[2].count = 0; | |
633 | ch->ccw[2].cda = 0; | |
634 | memcpy(&ch->ccw[3], &ch->ccw[0], sizeof(struct ccw1) * 3); | |
635 | ch->ccw[4].cda = 0; | |
636 | ch->ccw[4].flags &= ~CCW_FLAG_IDA; | |
637 | ||
638 | fsm_newstate(fi, CTC_STATE_STARTWAIT); | |
639 | fsm_addtimer(&ch->timer, 1000, CTC_EVENT_TIMER, ch); | |
640 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
641 | rc = ccw_device_halt(ch->cdev, (unsigned long)ch); | |
642 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
643 | if (rc != 0) { | |
644 | if (rc != -EBUSY) | |
645 | fsm_deltimer(&ch->timer); | |
646 | ctcm_ccw_check_rc(ch, rc, "initial HaltIO"); | |
647 | } | |
648 | } | |
649 | ||
650 | /** | |
651 | * Shutdown a channel. | |
652 | * | |
653 | * fi An instance of a channel statemachine. | |
654 | * event The event, just happened. | |
655 | * arg Generic pointer, casted from channel * upon call. | |
656 | */ | |
657 | static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg) | |
658 | { | |
659 | struct channel *ch = arg; | |
660 | unsigned long saveflags = 0; | |
661 | int rc; | |
662 | int oldstate; | |
663 | ||
293d984f PT |
664 | fsm_deltimer(&ch->timer); |
665 | if (IS_MPC(ch)) | |
666 | fsm_deltimer(&ch->sweep_timer); | |
667 | ||
668 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
669 | ||
670 | if (event == CTC_EVENT_STOP) /* only for STOP not yet locked */ | |
671 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
672 | /* Such conditional locking is undeterministic in | |
673 | * static view. => ignore sparse warnings here. */ | |
674 | oldstate = fsm_getstate(fi); | |
675 | fsm_newstate(fi, CTC_STATE_TERM); | |
676 | rc = ccw_device_halt(ch->cdev, (unsigned long)ch); | |
677 | ||
678 | if (event == CTC_EVENT_STOP) | |
679 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
680 | /* see remark above about conditional locking */ | |
681 | ||
682 | if (rc != 0 && rc != -EBUSY) { | |
683 | fsm_deltimer(&ch->timer); | |
684 | if (event != CTC_EVENT_STOP) { | |
685 | fsm_newstate(fi, oldstate); | |
aa3f2cb6 | 686 | ctcm_ccw_check_rc(ch, rc, (char *)__func__); |
293d984f PT |
687 | } |
688 | } | |
689 | } | |
690 | ||
691 | /** | |
692 | * Cleanup helper for chx_fail and chx_stopped | |
693 | * cleanup channels queue and notify interface statemachine. | |
694 | * | |
695 | * fi An instance of a channel statemachine. | |
696 | * state The next state (depending on caller). | |
697 | * ch The channel to operate on. | |
698 | */ | |
699 | static void ctcm_chx_cleanup(fsm_instance *fi, int state, | |
700 | struct channel *ch) | |
701 | { | |
702 | struct net_device *dev = ch->netdev; | |
261893d3 | 703 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 704 | |
aa3f2cb6 PT |
705 | CTCM_DBF_TEXT_(SETUP, CTC_DBF_NOTICE, |
706 | "%s(%s): %s[%d]\n", | |
707 | CTCM_FUNTAIL, dev->name, ch->id, state); | |
293d984f PT |
708 | |
709 | fsm_deltimer(&ch->timer); | |
710 | if (IS_MPC(ch)) | |
711 | fsm_deltimer(&ch->sweep_timer); | |
712 | ||
713 | fsm_newstate(fi, state); | |
714 | if (state == CTC_STATE_STOPPED && ch->trans_skb != NULL) { | |
715 | clear_normalized_cda(&ch->ccw[1]); | |
716 | dev_kfree_skb_any(ch->trans_skb); | |
717 | ch->trans_skb = NULL; | |
718 | } | |
719 | ||
720 | ch->th_seg = 0x00; | |
721 | ch->th_seq_num = 0x00; | |
3c09e264 | 722 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
293d984f PT |
723 | skb_queue_purge(&ch->io_queue); |
724 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
725 | } else { | |
726 | ctcm_purge_skb_queue(&ch->io_queue); | |
727 | if (IS_MPC(ch)) | |
728 | ctcm_purge_skb_queue(&ch->sweep_queue); | |
729 | spin_lock(&ch->collect_lock); | |
730 | ctcm_purge_skb_queue(&ch->collect_queue); | |
731 | ch->collect_len = 0; | |
732 | spin_unlock(&ch->collect_lock); | |
733 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
734 | } | |
735 | } | |
736 | ||
737 | /** | |
738 | * A channel has successfully been halted. | |
739 | * Cleanup it's queue and notify interface statemachine. | |
740 | * | |
741 | * fi An instance of a channel statemachine. | |
742 | * event The event, just happened. | |
743 | * arg Generic pointer, casted from channel * upon call. | |
744 | */ | |
745 | static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg) | |
746 | { | |
293d984f PT |
747 | ctcm_chx_cleanup(fi, CTC_STATE_STOPPED, arg); |
748 | } | |
749 | ||
750 | /** | |
751 | * A stop command from device statemachine arrived and we are in | |
752 | * not operational mode. Set state to stopped. | |
753 | * | |
754 | * fi An instance of a channel statemachine. | |
755 | * event The event, just happened. | |
756 | * arg Generic pointer, casted from channel * upon call. | |
757 | */ | |
758 | static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg) | |
759 | { | |
760 | fsm_newstate(fi, CTC_STATE_STOPPED); | |
761 | } | |
762 | ||
763 | /** | |
764 | * A machine check for no path, not operational status or gone device has | |
765 | * happened. | |
766 | * Cleanup queue and notify interface statemachine. | |
767 | * | |
768 | * fi An instance of a channel statemachine. | |
769 | * event The event, just happened. | |
770 | * arg Generic pointer, casted from channel * upon call. | |
771 | */ | |
772 | static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg) | |
773 | { | |
293d984f PT |
774 | ctcm_chx_cleanup(fi, CTC_STATE_NOTOP, arg); |
775 | } | |
776 | ||
777 | /** | |
778 | * Handle error during setup of channel. | |
779 | * | |
780 | * fi An instance of a channel statemachine. | |
781 | * event The event, just happened. | |
782 | * arg Generic pointer, casted from channel * upon call. | |
783 | */ | |
784 | static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg) | |
785 | { | |
786 | struct channel *ch = arg; | |
787 | struct net_device *dev = ch->netdev; | |
261893d3 | 788 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
789 | |
790 | /* | |
791 | * Special case: Got UC_RCRESET on setmode. | |
792 | * This means that remote side isn't setup. In this case | |
793 | * simply retry after some 10 secs... | |
794 | */ | |
795 | if ((fsm_getstate(fi) == CTC_STATE_SETUPWAIT) && | |
796 | ((event == CTC_EVENT_UC_RCRESET) || | |
797 | (event == CTC_EVENT_UC_RSRESET))) { | |
798 | fsm_newstate(fi, CTC_STATE_STARTRETRY); | |
799 | fsm_deltimer(&ch->timer); | |
800 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
3c09e264 UB |
801 | if (!IS_MPC(ch) && |
802 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ)) { | |
293d984f PT |
803 | int rc = ccw_device_halt(ch->cdev, (unsigned long)ch); |
804 | if (rc != 0) | |
805 | ctcm_ccw_check_rc(ch, rc, | |
806 | "HaltIO in chx_setuperr"); | |
807 | } | |
808 | return; | |
809 | } | |
810 | ||
811 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_CRIT, | |
aa3f2cb6 PT |
812 | "%s(%s) : %s error during %s channel setup state=%s\n", |
813 | CTCM_FUNTAIL, dev->name, ctc_ch_event_names[event], | |
3c09e264 | 814 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? "RX" : "TX", |
293d984f PT |
815 | fsm_getstate_str(fi)); |
816 | ||
3c09e264 | 817 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
293d984f PT |
818 | fsm_newstate(fi, CTC_STATE_RXERR); |
819 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
820 | } else { | |
821 | fsm_newstate(fi, CTC_STATE_TXERR); | |
822 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
823 | } | |
824 | } | |
825 | ||
826 | /** | |
827 | * Restart a channel after an error. | |
828 | * | |
829 | * fi An instance of a channel statemachine. | |
830 | * event The event, just happened. | |
831 | * arg Generic pointer, casted from channel * upon call. | |
832 | */ | |
833 | static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg) | |
834 | { | |
835 | struct channel *ch = arg; | |
836 | struct net_device *dev = ch->netdev; | |
837 | unsigned long saveflags = 0; | |
838 | int oldstate; | |
839 | int rc; | |
840 | ||
aa3f2cb6 PT |
841 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
842 | "%s: %s[%d] of %s\n", | |
843 | CTCM_FUNTAIL, ch->id, event, dev->name); | |
844 | ||
293d984f | 845 | fsm_deltimer(&ch->timer); |
aa3f2cb6 | 846 | |
293d984f PT |
847 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); |
848 | oldstate = fsm_getstate(fi); | |
849 | fsm_newstate(fi, CTC_STATE_STARTWAIT); | |
850 | if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */ | |
851 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
852 | /* Such conditional locking is a known problem for | |
853 | * sparse because its undeterministic in static view. | |
854 | * Warnings should be ignored here. */ | |
855 | rc = ccw_device_halt(ch->cdev, (unsigned long)ch); | |
856 | if (event == CTC_EVENT_TIMER) | |
857 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
858 | if (rc != 0) { | |
859 | if (rc != -EBUSY) { | |
860 | fsm_deltimer(&ch->timer); | |
861 | fsm_newstate(fi, oldstate); | |
862 | } | |
863 | ctcm_ccw_check_rc(ch, rc, "HaltIO in ctcm_chx_restart"); | |
864 | } | |
865 | } | |
866 | ||
867 | /** | |
868 | * Handle error during RX initial handshake (exchange of | |
869 | * 0-length block header) | |
870 | * | |
871 | * fi An instance of a channel statemachine. | |
872 | * event The event, just happened. | |
873 | * arg Generic pointer, casted from channel * upon call. | |
874 | */ | |
875 | static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg) | |
876 | { | |
877 | struct channel *ch = arg; | |
878 | struct net_device *dev = ch->netdev; | |
261893d3 | 879 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 880 | |
293d984f PT |
881 | if (event == CTC_EVENT_TIMER) { |
882 | if (!IS_MPCDEV(dev)) | |
883 | /* TODO : check if MPC deletes timer somewhere */ | |
884 | fsm_deltimer(&ch->timer); | |
293d984f PT |
885 | if (ch->retry++ < 3) |
886 | ctcm_chx_restart(fi, event, arg); | |
887 | else { | |
888 | fsm_newstate(fi, CTC_STATE_RXERR); | |
889 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
890 | } | |
2a7c6f2c PT |
891 | } else { |
892 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, | |
893 | "%s(%s): %s in %s", CTCM_FUNTAIL, ch->id, | |
894 | ctc_ch_event_names[event], fsm_getstate_str(fi)); | |
895 | ||
896 | dev_warn(&dev->dev, | |
897 | "Initialization failed with RX/TX init handshake " | |
898 | "error %s\n", ctc_ch_event_names[event]); | |
899 | } | |
293d984f PT |
900 | } |
901 | ||
902 | /** | |
903 | * Notify device statemachine if we gave up initialization | |
904 | * of RX channel. | |
905 | * | |
906 | * fi An instance of a channel statemachine. | |
907 | * event The event, just happened. | |
908 | * arg Generic pointer, casted from channel * upon call. | |
909 | */ | |
910 | static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg) | |
911 | { | |
912 | struct channel *ch = arg; | |
913 | struct net_device *dev = ch->netdev; | |
261893d3 | 914 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 915 | |
aa3f2cb6 PT |
916 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, |
917 | "%s(%s): RX %s busy, init. fail", | |
918 | CTCM_FUNTAIL, dev->name, ch->id); | |
293d984f | 919 | fsm_newstate(fi, CTC_STATE_RXERR); |
293d984f PT |
920 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); |
921 | } | |
922 | ||
923 | /** | |
924 | * Handle RX Unit check remote reset (remote disconnected) | |
925 | * | |
926 | * fi An instance of a channel statemachine. | |
927 | * event The event, just happened. | |
928 | * arg Generic pointer, casted from channel * upon call. | |
929 | */ | |
930 | static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg) | |
931 | { | |
932 | struct channel *ch = arg; | |
933 | struct channel *ch2; | |
934 | struct net_device *dev = ch->netdev; | |
261893d3 | 935 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 936 | |
aa3f2cb6 PT |
937 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
938 | "%s: %s: remote disconnect - re-init ...", | |
939 | CTCM_FUNTAIL, dev->name); | |
293d984f | 940 | fsm_deltimer(&ch->timer); |
293d984f PT |
941 | /* |
942 | * Notify device statemachine | |
943 | */ | |
944 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
945 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
946 | ||
947 | fsm_newstate(fi, CTC_STATE_DTERM); | |
3c09e264 | 948 | ch2 = priv->channel[CTCM_WRITE]; |
293d984f PT |
949 | fsm_newstate(ch2->fsm, CTC_STATE_DTERM); |
950 | ||
951 | ccw_device_halt(ch->cdev, (unsigned long)ch); | |
952 | ccw_device_halt(ch2->cdev, (unsigned long)ch2); | |
953 | } | |
954 | ||
955 | /** | |
956 | * Handle error during TX channel initialization. | |
957 | * | |
958 | * fi An instance of a channel statemachine. | |
959 | * event The event, just happened. | |
960 | * arg Generic pointer, casted from channel * upon call. | |
961 | */ | |
962 | static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg) | |
963 | { | |
964 | struct channel *ch = arg; | |
965 | struct net_device *dev = ch->netdev; | |
261893d3 | 966 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
967 | |
968 | if (event == CTC_EVENT_TIMER) { | |
969 | fsm_deltimer(&ch->timer); | |
293d984f PT |
970 | if (ch->retry++ < 3) |
971 | ctcm_chx_restart(fi, event, arg); | |
972 | else { | |
973 | fsm_newstate(fi, CTC_STATE_TXERR); | |
974 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
975 | } | |
976 | } else { | |
977 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, | |
aa3f2cb6 PT |
978 | "%s(%s): %s in %s", CTCM_FUNTAIL, ch->id, |
979 | ctc_ch_event_names[event], fsm_getstate_str(fi)); | |
293d984f | 980 | |
2a7c6f2c PT |
981 | dev_warn(&dev->dev, |
982 | "Initialization failed with RX/TX init handshake " | |
983 | "error %s\n", ctc_ch_event_names[event]); | |
293d984f PT |
984 | } |
985 | } | |
986 | ||
987 | /** | |
988 | * Handle TX timeout by retrying operation. | |
989 | * | |
990 | * fi An instance of a channel statemachine. | |
991 | * event The event, just happened. | |
992 | * arg Generic pointer, casted from channel * upon call. | |
993 | */ | |
994 | static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg) | |
995 | { | |
996 | struct channel *ch = arg; | |
997 | struct net_device *dev = ch->netdev; | |
261893d3 | 998 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
999 | struct sk_buff *skb; |
1000 | ||
aa3f2cb6 PT |
1001 | CTCM_PR_DEBUG("Enter: %s: cp=%i ch=0x%p id=%s\n", |
1002 | __func__, smp_processor_id(), ch, ch->id); | |
293d984f PT |
1003 | |
1004 | fsm_deltimer(&ch->timer); | |
1005 | if (ch->retry++ > 3) { | |
1006 | struct mpc_group *gptr = priv->mpcg; | |
aa3f2cb6 PT |
1007 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_INFO, |
1008 | "%s: %s: retries exceeded", | |
1009 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1010 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); |
1011 | /* call restart if not MPC or if MPC and mpcg fsm is ready. | |
1012 | use gptr as mpc indicator */ | |
1013 | if (!(gptr && (fsm_getstate(gptr->fsm) != MPCG_STATE_READY))) | |
1014 | ctcm_chx_restart(fi, event, arg); | |
1015 | goto done; | |
1016 | } | |
1017 | ||
aa3f2cb6 PT |
1018 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, |
1019 | "%s : %s: retry %d", | |
1020 | CTCM_FUNTAIL, ch->id, ch->retry); | |
293d984f PT |
1021 | skb = skb_peek(&ch->io_queue); |
1022 | if (skb) { | |
1023 | int rc = 0; | |
1024 | unsigned long saveflags = 0; | |
1025 | clear_normalized_cda(&ch->ccw[4]); | |
1026 | ch->ccw[4].count = skb->len; | |
1027 | if (set_normalized_cda(&ch->ccw[4], skb->data)) { | |
aa3f2cb6 PT |
1028 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_INFO, |
1029 | "%s: %s: IDAL alloc failed", | |
1030 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1031 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); |
1032 | ctcm_chx_restart(fi, event, arg); | |
1033 | goto done; | |
1034 | } | |
1035 | fsm_addtimer(&ch->timer, 1000, CTC_EVENT_TIMER, ch); | |
1036 | if (event == CTC_EVENT_TIMER) /* for TIMER not yet locked */ | |
1037 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
1038 | /* Such conditional locking is a known problem for | |
1039 | * sparse because its undeterministic in static view. | |
1040 | * Warnings should be ignored here. */ | |
1041 | if (do_debug_ccw) | |
1042 | ctcmpc_dumpit((char *)&ch->ccw[3], | |
1043 | sizeof(struct ccw1) * 3); | |
1044 | ||
1045 | rc = ccw_device_start(ch->cdev, &ch->ccw[3], | |
1046 | (unsigned long)ch, 0xff, 0); | |
1047 | if (event == CTC_EVENT_TIMER) | |
1048 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), | |
1049 | saveflags); | |
1050 | if (rc != 0) { | |
1051 | fsm_deltimer(&ch->timer); | |
1052 | ctcm_ccw_check_rc(ch, rc, "TX in chx_txretry"); | |
1053 | ctcm_purge_skb_queue(&ch->io_queue); | |
1054 | } | |
1055 | } | |
1056 | done: | |
1057 | return; | |
1058 | } | |
1059 | ||
1060 | /** | |
1061 | * Handle fatal errors during an I/O command. | |
1062 | * | |
1063 | * fi An instance of a channel statemachine. | |
1064 | * event The event, just happened. | |
1065 | * arg Generic pointer, casted from channel * upon call. | |
1066 | */ | |
1067 | static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg) | |
1068 | { | |
1069 | struct channel *ch = arg; | |
1070 | struct net_device *dev = ch->netdev; | |
261893d3 | 1071 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 1072 | int rd = CHANNEL_DIRECTION(ch->flags); |
293d984f | 1073 | |
293d984f | 1074 | fsm_deltimer(&ch->timer); |
aa3f2cb6 PT |
1075 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, |
1076 | "%s: %s: %s unrecoverable channel error", | |
3c09e264 | 1077 | CTCM_FUNTAIL, ch->id, rd == CTCM_READ ? "RX" : "TX"); |
aa3f2cb6 | 1078 | |
293d984f PT |
1079 | if (IS_MPC(ch)) { |
1080 | priv->stats.tx_dropped++; | |
1081 | priv->stats.tx_errors++; | |
1082 | } | |
3c09e264 | 1083 | if (rd == CTCM_READ) { |
293d984f PT |
1084 | fsm_newstate(fi, CTC_STATE_RXERR); |
1085 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
1086 | } else { | |
293d984f PT |
1087 | fsm_newstate(fi, CTC_STATE_TXERR); |
1088 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
1089 | } | |
1090 | } | |
1091 | ||
1092 | /* | |
1093 | * The ctcm statemachine for a channel. | |
1094 | */ | |
1095 | const fsm_node ch_fsm[] = { | |
1096 | { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop }, | |
1097 | { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start }, | |
1098 | { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1099 | { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop }, | |
1100 | ||
1101 | { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop }, | |
1102 | { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop }, | |
1103 | { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1104 | { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop }, | |
1105 | { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start }, | |
1106 | ||
1107 | { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1108 | { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop }, | |
1109 | { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, | |
1110 | { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr }, | |
1111 | { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1112 | { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1113 | ||
1114 | { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1115 | { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode }, | |
1116 | { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1117 | { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1118 | ||
1119 | { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1120 | { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop }, | |
1121 | { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, chx_firstio }, | |
1122 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1123 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1124 | { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode }, | |
1125 | { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1126 | { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1127 | ||
1128 | { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1129 | { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop }, | |
1130 | { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, chx_rxidle }, | |
1131 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr }, | |
1132 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr }, | |
1133 | { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr }, | |
1134 | { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail }, | |
1135 | { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1136 | { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, chx_firstio }, | |
1137 | { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1138 | ||
1139 | { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1140 | { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop }, | |
1141 | { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, chx_rx }, | |
1142 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc }, | |
1143 | { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1144 | { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1145 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, chx_rx }, | |
1146 | ||
1147 | { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1148 | { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop }, | |
1149 | { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle }, | |
1150 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr }, | |
1151 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr }, | |
1152 | { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr }, | |
1153 | { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1154 | { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1155 | ||
1156 | { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1157 | { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop }, | |
1158 | { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, chx_firstio }, | |
1159 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, | |
1160 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, | |
1161 | { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1162 | { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1163 | ||
1164 | { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop }, | |
1165 | { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart }, | |
1166 | { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped }, | |
1167 | { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, | |
1168 | { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, | |
1169 | { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1170 | ||
1171 | { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1172 | { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart }, | |
1173 | { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, | |
1174 | { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, | |
1175 | { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, | |
1176 | { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1177 | ||
1178 | { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1179 | { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop }, | |
1180 | { CTC_STATE_TX, CTC_EVENT_FINSTAT, chx_txdone }, | |
1181 | { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_txretry }, | |
1182 | { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_txretry }, | |
1183 | { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry }, | |
1184 | { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1185 | { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1186 | ||
1187 | { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1188 | { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1189 | { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1190 | { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1191 | }; | |
1192 | ||
1193 | int ch_fsm_len = ARRAY_SIZE(ch_fsm); | |
1194 | ||
1195 | /* | |
1196 | * MPC actions for mpc channel statemachine | |
1197 | * handling of MPC protocol requires extra | |
1198 | * statemachine and actions which are prefixed ctcmpc_ . | |
1199 | * The ctc_ch_states and ctc_ch_state_names, | |
1200 | * ctc_ch_events and ctc_ch_event_names share the ctcm definitions | |
1201 | * which are expanded by some elements. | |
1202 | */ | |
1203 | ||
1204 | /* | |
1205 | * Actions for mpc channel statemachine. | |
1206 | */ | |
1207 | ||
1208 | /** | |
1209 | * Normal data has been send. Free the corresponding | |
1210 | * skb (it's in io_queue), reset dev->tbusy and | |
1211 | * revert to idle state. | |
1212 | * | |
1213 | * fi An instance of a channel statemachine. | |
1214 | * event The event, just happened. | |
1215 | * arg Generic pointer, casted from channel * upon call. | |
1216 | */ | |
1217 | static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg) | |
1218 | { | |
1219 | struct channel *ch = arg; | |
1220 | struct net_device *dev = ch->netdev; | |
261893d3 | 1221 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1222 | struct mpc_group *grp = priv->mpcg; |
1223 | struct sk_buff *skb; | |
1224 | int first = 1; | |
1225 | int i; | |
293d984f PT |
1226 | __u32 data_space; |
1227 | unsigned long duration; | |
1228 | struct sk_buff *peekskb; | |
1229 | int rc; | |
1230 | struct th_header *header; | |
1231 | struct pdu *p_header; | |
aa3f2cb6 | 1232 | struct timespec done_stamp = current_kernel_time(); /* xtime */ |
293d984f | 1233 | |
aa3f2cb6 PT |
1234 | CTCM_PR_DEBUG("Enter %s: %s cp:%i\n", |
1235 | __func__, dev->name, smp_processor_id()); | |
293d984f | 1236 | |
aa3f2cb6 PT |
1237 | duration = |
1238 | (done_stamp.tv_sec - ch->prof.send_stamp.tv_sec) * 1000000 + | |
1239 | (done_stamp.tv_nsec - ch->prof.send_stamp.tv_nsec) / 1000; | |
293d984f PT |
1240 | if (duration > ch->prof.tx_time) |
1241 | ch->prof.tx_time = duration; | |
1242 | ||
23d805b6 | 1243 | if (ch->irb->scsw.cmd.count != 0) |
aa3f2cb6 PT |
1244 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
1245 | "%s(%s): TX not complete, remaining %d bytes", | |
1246 | CTCM_FUNTAIL, dev->name, ch->irb->scsw.cmd.count); | |
293d984f PT |
1247 | fsm_deltimer(&ch->timer); |
1248 | while ((skb = skb_dequeue(&ch->io_queue))) { | |
1249 | priv->stats.tx_packets++; | |
1250 | priv->stats.tx_bytes += skb->len - TH_HEADER_LENGTH; | |
1251 | if (first) { | |
1252 | priv->stats.tx_bytes += 2; | |
1253 | first = 0; | |
1254 | } | |
1255 | atomic_dec(&skb->users); | |
1256 | dev_kfree_skb_irq(skb); | |
1257 | } | |
1258 | spin_lock(&ch->collect_lock); | |
1259 | clear_normalized_cda(&ch->ccw[4]); | |
293d984f PT |
1260 | if ((ch->collect_len <= 0) || (grp->in_sweep != 0)) { |
1261 | spin_unlock(&ch->collect_lock); | |
1262 | fsm_newstate(fi, CTC_STATE_TXIDLE); | |
1263 | goto done; | |
1264 | } | |
1265 | ||
1266 | if (ctcm_checkalloc_buffer(ch)) { | |
1267 | spin_unlock(&ch->collect_lock); | |
1268 | goto done; | |
1269 | } | |
1270 | ch->trans_skb->data = ch->trans_skb_data; | |
1271 | skb_reset_tail_pointer(ch->trans_skb); | |
1272 | ch->trans_skb->len = 0; | |
1273 | if (ch->prof.maxmulti < (ch->collect_len + TH_HEADER_LENGTH)) | |
1274 | ch->prof.maxmulti = ch->collect_len + TH_HEADER_LENGTH; | |
1275 | if (ch->prof.maxcqueue < skb_queue_len(&ch->collect_queue)) | |
1276 | ch->prof.maxcqueue = skb_queue_len(&ch->collect_queue); | |
1277 | i = 0; | |
aa3f2cb6 | 1278 | p_header = NULL; |
293d984f PT |
1279 | data_space = grp->group_max_buflen - TH_HEADER_LENGTH; |
1280 | ||
aa3f2cb6 PT |
1281 | CTCM_PR_DBGDATA("%s: building trans_skb from collect_q" |
1282 | " data_space:%04x\n", | |
1283 | __func__, data_space); | |
1284 | ||
293d984f PT |
1285 | while ((skb = skb_dequeue(&ch->collect_queue))) { |
1286 | memcpy(skb_put(ch->trans_skb, skb->len), skb->data, skb->len); | |
1287 | p_header = (struct pdu *) | |
1288 | (skb_tail_pointer(ch->trans_skb) - skb->len); | |
1289 | p_header->pdu_flag = 0x00; | |
1290 | if (skb->protocol == ntohs(ETH_P_SNAP)) | |
1291 | p_header->pdu_flag |= 0x60; | |
1292 | else | |
1293 | p_header->pdu_flag |= 0x20; | |
1294 | ||
aa3f2cb6 PT |
1295 | CTCM_PR_DBGDATA("%s: trans_skb len:%04x \n", |
1296 | __func__, ch->trans_skb->len); | |
1297 | CTCM_PR_DBGDATA("%s: pdu header and data for up" | |
1298 | " to 32 bytes sent to vtam\n", __func__); | |
1299 | CTCM_D3_DUMP((char *)p_header, min_t(int, skb->len, 32)); | |
1300 | ||
293d984f PT |
1301 | ch->collect_len -= skb->len; |
1302 | data_space -= skb->len; | |
1303 | priv->stats.tx_packets++; | |
1304 | priv->stats.tx_bytes += skb->len; | |
1305 | atomic_dec(&skb->users); | |
1306 | dev_kfree_skb_any(skb); | |
1307 | peekskb = skb_peek(&ch->collect_queue); | |
1308 | if (peekskb->len > data_space) | |
1309 | break; | |
1310 | i++; | |
1311 | } | |
1312 | /* p_header points to the last one we handled */ | |
1313 | if (p_header) | |
1314 | p_header->pdu_flag |= PDU_LAST; /*Say it's the last one*/ | |
1315 | header = kzalloc(TH_HEADER_LENGTH, gfp_type()); | |
293d984f | 1316 | if (!header) { |
293d984f PT |
1317 | spin_unlock(&ch->collect_lock); |
1318 | fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev); | |
aa3f2cb6 | 1319 | goto done; |
293d984f | 1320 | } |
293d984f PT |
1321 | header->th_ch_flag = TH_HAS_PDU; /* Normal data */ |
1322 | ch->th_seq_num++; | |
1323 | header->th_seq_num = ch->th_seq_num; | |
1324 | ||
aa3f2cb6 PT |
1325 | CTCM_PR_DBGDATA("%s: ToVTAM_th_seq= %08x\n" , |
1326 | __func__, ch->th_seq_num); | |
293d984f PT |
1327 | |
1328 | memcpy(skb_push(ch->trans_skb, TH_HEADER_LENGTH), header, | |
1329 | TH_HEADER_LENGTH); /* put the TH on the packet */ | |
1330 | ||
1331 | kfree(header); | |
1332 | ||
aa3f2cb6 PT |
1333 | CTCM_PR_DBGDATA("%s: trans_skb len:%04x \n", |
1334 | __func__, ch->trans_skb->len); | |
1335 | CTCM_PR_DBGDATA("%s: up-to-50 bytes of trans_skb " | |
1336 | "data to vtam from collect_q\n", __func__); | |
1337 | CTCM_D3_DUMP((char *)ch->trans_skb->data, | |
293d984f | 1338 | min_t(int, ch->trans_skb->len, 50)); |
293d984f PT |
1339 | |
1340 | spin_unlock(&ch->collect_lock); | |
1341 | clear_normalized_cda(&ch->ccw[1]); | |
205a8b64 BT |
1342 | |
1343 | CTCM_PR_DBGDATA("ccwcda=0x%p data=0x%p\n", | |
1344 | (void *)(unsigned long)ch->ccw[1].cda, | |
1345 | ch->trans_skb->data); | |
1346 | ch->ccw[1].count = ch->max_bufsize; | |
1347 | ||
293d984f PT |
1348 | if (set_normalized_cda(&ch->ccw[1], ch->trans_skb->data)) { |
1349 | dev_kfree_skb_any(ch->trans_skb); | |
1350 | ch->trans_skb = NULL; | |
aa3f2cb6 PT |
1351 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ERROR, |
1352 | "%s: %s: IDAL alloc failed", | |
1353 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1354 | fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev); |
1355 | return; | |
1356 | } | |
205a8b64 BT |
1357 | |
1358 | CTCM_PR_DBGDATA("ccwcda=0x%p data=0x%p\n", | |
1359 | (void *)(unsigned long)ch->ccw[1].cda, | |
1360 | ch->trans_skb->data); | |
1361 | ||
293d984f PT |
1362 | ch->ccw[1].count = ch->trans_skb->len; |
1363 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
1364 | ch->prof.send_stamp = current_kernel_time(); /* xtime */ | |
1365 | if (do_debug_ccw) | |
1366 | ctcmpc_dumpit((char *)&ch->ccw[0], sizeof(struct ccw1) * 3); | |
1367 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
1368 | (unsigned long)ch, 0xff, 0); | |
1369 | ch->prof.doios_multi++; | |
1370 | if (rc != 0) { | |
1371 | priv->stats.tx_dropped += i; | |
1372 | priv->stats.tx_errors += i; | |
1373 | fsm_deltimer(&ch->timer); | |
1374 | ctcm_ccw_check_rc(ch, rc, "chained TX"); | |
1375 | } | |
1376 | done: | |
1377 | ctcm_clear_busy(dev); | |
293d984f PT |
1378 | return; |
1379 | } | |
1380 | ||
1381 | /** | |
1382 | * Got normal data, check for sanity, queue it up, allocate new buffer | |
1383 | * trigger bottom half, and initiate next read. | |
1384 | * | |
1385 | * fi An instance of a channel statemachine. | |
1386 | * event The event, just happened. | |
1387 | * arg Generic pointer, casted from channel * upon call. | |
1388 | */ | |
1389 | static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg) | |
1390 | { | |
1391 | struct channel *ch = arg; | |
1392 | struct net_device *dev = ch->netdev; | |
261893d3 | 1393 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1394 | struct mpc_group *grp = priv->mpcg; |
1395 | struct sk_buff *skb = ch->trans_skb; | |
1396 | struct sk_buff *new_skb; | |
aa3f2cb6 | 1397 | unsigned long saveflags = 0; /* avoids compiler warning */ |
23d805b6 | 1398 | int len = ch->max_bufsize - ch->irb->scsw.cmd.count; |
293d984f | 1399 | |
aa3f2cb6 PT |
1400 | CTCM_PR_DEBUG("%s: %s: cp:%i %s maxbuf : %04x, len: %04x\n", |
1401 | CTCM_FUNTAIL, dev->name, smp_processor_id(), | |
1402 | ch->id, ch->max_bufsize, len); | |
293d984f PT |
1403 | fsm_deltimer(&ch->timer); |
1404 | ||
1405 | if (skb == NULL) { | |
aa3f2cb6 PT |
1406 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1407 | "%s(%s): TRANS_SKB = NULL", | |
1408 | CTCM_FUNTAIL, dev->name); | |
1409 | goto again; | |
293d984f PT |
1410 | } |
1411 | ||
1412 | if (len < TH_HEADER_LENGTH) { | |
aa3f2cb6 PT |
1413 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1414 | "%s(%s): packet length %d to short", | |
1415 | CTCM_FUNTAIL, dev->name, len); | |
293d984f PT |
1416 | priv->stats.rx_dropped++; |
1417 | priv->stats.rx_length_errors++; | |
1418 | } else { | |
1419 | /* must have valid th header or game over */ | |
1420 | __u32 block_len = len; | |
1421 | len = TH_HEADER_LENGTH + XID2_LENGTH + 4; | |
1422 | new_skb = __dev_alloc_skb(ch->max_bufsize, GFP_ATOMIC); | |
1423 | ||
1424 | if (new_skb == NULL) { | |
aa3f2cb6 PT |
1425 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1426 | "%s(%d): skb allocation failed", | |
1427 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
1428 | fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev); |
1429 | goto again; | |
1430 | } | |
1431 | switch (fsm_getstate(grp->fsm)) { | |
1432 | case MPCG_STATE_RESET: | |
1433 | case MPCG_STATE_INOP: | |
1434 | dev_kfree_skb_any(new_skb); | |
1435 | break; | |
1436 | case MPCG_STATE_FLOWC: | |
1437 | case MPCG_STATE_READY: | |
1438 | memcpy(skb_put(new_skb, block_len), | |
1439 | skb->data, block_len); | |
1440 | skb_queue_tail(&ch->io_queue, new_skb); | |
1441 | tasklet_schedule(&ch->ch_tasklet); | |
1442 | break; | |
1443 | default: | |
1444 | memcpy(skb_put(new_skb, len), skb->data, len); | |
1445 | skb_queue_tail(&ch->io_queue, new_skb); | |
1446 | tasklet_hi_schedule(&ch->ch_tasklet); | |
1447 | break; | |
1448 | } | |
1449 | } | |
1450 | ||
1451 | again: | |
1452 | switch (fsm_getstate(grp->fsm)) { | |
1453 | int rc, dolock; | |
1454 | case MPCG_STATE_FLOWC: | |
1455 | case MPCG_STATE_READY: | |
1456 | if (ctcm_checkalloc_buffer(ch)) | |
1457 | break; | |
1458 | ch->trans_skb->data = ch->trans_skb_data; | |
1459 | skb_reset_tail_pointer(ch->trans_skb); | |
1460 | ch->trans_skb->len = 0; | |
1461 | ch->ccw[1].count = ch->max_bufsize; | |
1462 | if (do_debug_ccw) | |
1463 | ctcmpc_dumpit((char *)&ch->ccw[0], | |
1464 | sizeof(struct ccw1) * 3); | |
1465 | dolock = !in_irq(); | |
1466 | if (dolock) | |
1467 | spin_lock_irqsave( | |
1468 | get_ccwdev_lock(ch->cdev), saveflags); | |
1469 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
1470 | (unsigned long)ch, 0xff, 0); | |
1471 | if (dolock) /* see remark about conditional locking */ | |
1472 | spin_unlock_irqrestore( | |
1473 | get_ccwdev_lock(ch->cdev), saveflags); | |
1474 | if (rc != 0) | |
1475 | ctcm_ccw_check_rc(ch, rc, "normal RX"); | |
1476 | default: | |
1477 | break; | |
1478 | } | |
1479 | ||
aa3f2cb6 PT |
1480 | CTCM_PR_DEBUG("Exit %s: %s, ch=0x%p, id=%s\n", |
1481 | __func__, dev->name, ch, ch->id); | |
293d984f PT |
1482 | |
1483 | } | |
1484 | ||
1485 | /** | |
1486 | * Initialize connection by sending a __u16 of value 0. | |
1487 | * | |
1488 | * fi An instance of a channel statemachine. | |
1489 | * event The event, just happened. | |
1490 | * arg Generic pointer, casted from channel * upon call. | |
1491 | */ | |
1492 | static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg) | |
1493 | { | |
1494 | struct channel *ch = arg; | |
1495 | struct net_device *dev = ch->netdev; | |
261893d3 | 1496 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 PT |
1497 | struct mpc_group *gptr = priv->mpcg; |
1498 | ||
1499 | CTCM_PR_DEBUG("Enter %s: id=%s, ch=0x%p\n", | |
1500 | __func__, ch->id, ch); | |
1501 | ||
1502 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_INFO, | |
1503 | "%s: %s: chstate:%i, grpstate:%i, prot:%i\n", | |
1504 | CTCM_FUNTAIL, ch->id, fsm_getstate(fi), | |
1505 | fsm_getstate(gptr->fsm), ch->protocol); | |
293d984f | 1506 | |
293d984f PT |
1507 | if (fsm_getstate(fi) == CTC_STATE_TXIDLE) |
1508 | MPC_DBF_DEV_NAME(TRACE, dev, "remote side issued READ? "); | |
1509 | ||
1510 | fsm_deltimer(&ch->timer); | |
1511 | if (ctcm_checkalloc_buffer(ch)) | |
1512 | goto done; | |
1513 | ||
1514 | switch (fsm_getstate(fi)) { | |
1515 | case CTC_STATE_STARTRETRY: | |
1516 | case CTC_STATE_SETUPWAIT: | |
3c09e264 | 1517 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
293d984f PT |
1518 | ctcmpc_chx_rxidle(fi, event, arg); |
1519 | } else { | |
1520 | fsm_newstate(fi, CTC_STATE_TXIDLE); | |
1521 | fsm_event(priv->fsm, DEV_EVENT_TXUP, dev); | |
1522 | } | |
1523 | goto done; | |
1524 | default: | |
1525 | break; | |
1526 | }; | |
1527 | ||
3c09e264 | 1528 | fsm_newstate(fi, (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) |
293d984f PT |
1529 | ? CTC_STATE_RXINIT : CTC_STATE_TXINIT); |
1530 | ||
1531 | done: | |
aa3f2cb6 PT |
1532 | CTCM_PR_DEBUG("Exit %s: id=%s, ch=0x%p\n", |
1533 | __func__, ch->id, ch); | |
293d984f PT |
1534 | return; |
1535 | } | |
1536 | ||
1537 | /** | |
1538 | * Got initial data, check it. If OK, | |
1539 | * notify device statemachine that we are up and | |
1540 | * running. | |
1541 | * | |
1542 | * fi An instance of a channel statemachine. | |
1543 | * event The event, just happened. | |
1544 | * arg Generic pointer, casted from channel * upon call. | |
1545 | */ | |
1546 | void ctcmpc_chx_rxidle(fsm_instance *fi, int event, void *arg) | |
1547 | { | |
1548 | struct channel *ch = arg; | |
1549 | struct net_device *dev = ch->netdev; | |
261893d3 | 1550 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1551 | struct mpc_group *grp = priv->mpcg; |
1552 | int rc; | |
1553 | unsigned long saveflags = 0; /* avoids compiler warning */ | |
1554 | ||
1555 | fsm_deltimer(&ch->timer); | |
aa3f2cb6 PT |
1556 | CTCM_PR_DEBUG("%s: %s: %s: cp:%i, chstate:%i grpstate:%i\n", |
1557 | __func__, ch->id, dev->name, smp_processor_id(), | |
1558 | fsm_getstate(fi), fsm_getstate(grp->fsm)); | |
293d984f PT |
1559 | |
1560 | fsm_newstate(fi, CTC_STATE_RXIDLE); | |
1561 | /* XID processing complete */ | |
1562 | ||
1563 | switch (fsm_getstate(grp->fsm)) { | |
1564 | case MPCG_STATE_FLOWC: | |
1565 | case MPCG_STATE_READY: | |
1566 | if (ctcm_checkalloc_buffer(ch)) | |
1567 | goto done; | |
1568 | ch->trans_skb->data = ch->trans_skb_data; | |
1569 | skb_reset_tail_pointer(ch->trans_skb); | |
1570 | ch->trans_skb->len = 0; | |
1571 | ch->ccw[1].count = ch->max_bufsize; | |
aa3f2cb6 | 1572 | CTCM_CCW_DUMP((char *)&ch->ccw[0], sizeof(struct ccw1) * 3); |
293d984f PT |
1573 | if (event == CTC_EVENT_START) |
1574 | /* see remark about conditional locking */ | |
1575 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
1576 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
1577 | (unsigned long)ch, 0xff, 0); | |
1578 | if (event == CTC_EVENT_START) | |
1579 | spin_unlock_irqrestore( | |
1580 | get_ccwdev_lock(ch->cdev), saveflags); | |
1581 | if (rc != 0) { | |
1582 | fsm_newstate(fi, CTC_STATE_RXINIT); | |
1583 | ctcm_ccw_check_rc(ch, rc, "initial RX"); | |
1584 | goto done; | |
1585 | } | |
1586 | break; | |
1587 | default: | |
1588 | break; | |
1589 | } | |
1590 | ||
1591 | fsm_event(priv->fsm, DEV_EVENT_RXUP, dev); | |
1592 | done: | |
293d984f PT |
1593 | return; |
1594 | } | |
1595 | ||
1596 | /* | |
1597 | * ctcmpc channel FSM action | |
1598 | * called from several points in ctcmpc_ch_fsm | |
1599 | * ctcmpc only | |
1600 | */ | |
1601 | static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg) | |
1602 | { | |
1603 | struct channel *ch = arg; | |
1604 | struct net_device *dev = ch->netdev; | |
261893d3 | 1605 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1606 | struct mpc_group *grp = priv->mpcg; |
1607 | ||
aa3f2cb6 PT |
1608 | CTCM_PR_DEBUG("%s(%s): %s(ch=0x%p), cp=%i, ChStat:%s, GrpStat:%s\n", |
1609 | __func__, dev->name, ch->id, ch, smp_processor_id(), | |
1610 | fsm_getstate_str(ch->fsm), fsm_getstate_str(grp->fsm)); | |
293d984f PT |
1611 | |
1612 | switch (fsm_getstate(grp->fsm)) { | |
1613 | case MPCG_STATE_XID2INITW: | |
1614 | /* ok..start yside xid exchanges */ | |
1615 | if (!ch->in_mpcgroup) | |
1616 | break; | |
1617 | if (fsm_getstate(ch->fsm) == CH_XID0_PENDING) { | |
1618 | fsm_deltimer(&grp->timer); | |
1619 | fsm_addtimer(&grp->timer, | |
1620 | MPC_XID_TIMEOUT_VALUE, | |
1621 | MPCG_EVENT_TIMER, dev); | |
1622 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch); | |
1623 | ||
1624 | } else if (fsm_getstate(ch->fsm) < CH_XID7_PENDING1) | |
1625 | /* attn rcvd before xid0 processed via bh */ | |
1626 | fsm_newstate(ch->fsm, CH_XID7_PENDING1); | |
1627 | break; | |
1628 | case MPCG_STATE_XID2INITX: | |
1629 | case MPCG_STATE_XID0IOWAIT: | |
1630 | case MPCG_STATE_XID0IOWAIX: | |
1631 | /* attn rcvd before xid0 processed on ch | |
1632 | but mid-xid0 processing for group */ | |
1633 | if (fsm_getstate(ch->fsm) < CH_XID7_PENDING1) | |
1634 | fsm_newstate(ch->fsm, CH_XID7_PENDING1); | |
1635 | break; | |
1636 | case MPCG_STATE_XID7INITW: | |
1637 | case MPCG_STATE_XID7INITX: | |
1638 | case MPCG_STATE_XID7INITI: | |
1639 | case MPCG_STATE_XID7INITZ: | |
1640 | switch (fsm_getstate(ch->fsm)) { | |
1641 | case CH_XID7_PENDING: | |
1642 | fsm_newstate(ch->fsm, CH_XID7_PENDING1); | |
1643 | break; | |
1644 | case CH_XID7_PENDING2: | |
1645 | fsm_newstate(ch->fsm, CH_XID7_PENDING3); | |
1646 | break; | |
1647 | } | |
1648 | fsm_event(grp->fsm, MPCG_EVENT_XID7DONE, dev); | |
1649 | break; | |
1650 | } | |
1651 | ||
293d984f | 1652 | return; |
293d984f PT |
1653 | } |
1654 | ||
1655 | /* | |
1656 | * ctcmpc channel FSM action | |
1657 | * called from one point in ctcmpc_ch_fsm | |
1658 | * ctcmpc only | |
1659 | */ | |
1660 | static void ctcmpc_chx_attnbusy(fsm_instance *fsm, int event, void *arg) | |
1661 | { | |
1662 | struct channel *ch = arg; | |
1663 | struct net_device *dev = ch->netdev; | |
261893d3 | 1664 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1665 | struct mpc_group *grp = priv->mpcg; |
1666 | ||
aa3f2cb6 PT |
1667 | CTCM_PR_DEBUG("%s(%s): %s\n ChState:%s GrpState:%s\n", |
1668 | __func__, dev->name, ch->id, | |
1669 | fsm_getstate_str(ch->fsm), fsm_getstate_str(grp->fsm)); | |
293d984f PT |
1670 | |
1671 | fsm_deltimer(&ch->timer); | |
1672 | ||
1673 | switch (fsm_getstate(grp->fsm)) { | |
1674 | case MPCG_STATE_XID0IOWAIT: | |
1675 | /* vtam wants to be primary.start yside xid exchanges*/ | |
1676 | /* only receive one attn-busy at a time so must not */ | |
1677 | /* change state each time */ | |
1678 | grp->changed_side = 1; | |
1679 | fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW); | |
1680 | break; | |
1681 | case MPCG_STATE_XID2INITW: | |
1682 | if (grp->changed_side == 1) { | |
1683 | grp->changed_side = 2; | |
1684 | break; | |
1685 | } | |
1686 | /* process began via call to establish_conn */ | |
1687 | /* so must report failure instead of reverting */ | |
1688 | /* back to ready-for-xid passive state */ | |
1689 | if (grp->estconnfunc) | |
1690 | goto done; | |
1691 | /* this attnbusy is NOT the result of xside xid */ | |
1692 | /* collisions so yside must have been triggered */ | |
1693 | /* by an ATTN that was not intended to start XID */ | |
1694 | /* processing. Revert back to ready-for-xid and */ | |
1695 | /* wait for ATTN interrupt to signal xid start */ | |
1696 | if (fsm_getstate(ch->fsm) == CH_XID0_INPROGRESS) { | |
1697 | fsm_newstate(ch->fsm, CH_XID0_PENDING) ; | |
1698 | fsm_deltimer(&grp->timer); | |
1699 | goto done; | |
1700 | } | |
1701 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1702 | goto done; | |
1703 | case MPCG_STATE_XID2INITX: | |
1704 | /* XID2 was received before ATTN Busy for second | |
1705 | channel.Send yside xid for second channel. | |
1706 | */ | |
1707 | if (grp->changed_side == 1) { | |
1708 | grp->changed_side = 2; | |
1709 | break; | |
1710 | } | |
1711 | case MPCG_STATE_XID0IOWAIX: | |
1712 | case MPCG_STATE_XID7INITW: | |
1713 | case MPCG_STATE_XID7INITX: | |
1714 | case MPCG_STATE_XID7INITI: | |
1715 | case MPCG_STATE_XID7INITZ: | |
1716 | default: | |
1717 | /* multiple attn-busy indicates too out-of-sync */ | |
1718 | /* and they are certainly not being received as part */ | |
1719 | /* of valid mpc group negotiations.. */ | |
1720 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1721 | goto done; | |
1722 | } | |
1723 | ||
1724 | if (grp->changed_side == 1) { | |
1725 | fsm_deltimer(&grp->timer); | |
1726 | fsm_addtimer(&grp->timer, MPC_XID_TIMEOUT_VALUE, | |
1727 | MPCG_EVENT_TIMER, dev); | |
1728 | } | |
1729 | if (ch->in_mpcgroup) | |
1730 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch); | |
1731 | else | |
aa3f2cb6 PT |
1732 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1733 | "%s(%s): channel %s not added to group", | |
1734 | CTCM_FUNTAIL, dev->name, ch->id); | |
293d984f PT |
1735 | |
1736 | done: | |
293d984f | 1737 | return; |
293d984f PT |
1738 | } |
1739 | ||
1740 | /* | |
1741 | * ctcmpc channel FSM action | |
1742 | * called from several points in ctcmpc_ch_fsm | |
1743 | * ctcmpc only | |
1744 | */ | |
1745 | static void ctcmpc_chx_resend(fsm_instance *fsm, int event, void *arg) | |
1746 | { | |
1747 | struct channel *ch = arg; | |
1748 | struct net_device *dev = ch->netdev; | |
261893d3 | 1749 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1750 | struct mpc_group *grp = priv->mpcg; |
1751 | ||
293d984f | 1752 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch); |
293d984f PT |
1753 | return; |
1754 | } | |
1755 | ||
1756 | /* | |
1757 | * ctcmpc channel FSM action | |
1758 | * called from several points in ctcmpc_ch_fsm | |
1759 | * ctcmpc only | |
1760 | */ | |
1761 | static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg) | |
1762 | { | |
1763 | struct channel *ach = arg; | |
1764 | struct net_device *dev = ach->netdev; | |
261893d3 | 1765 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 1766 | struct mpc_group *grp = priv->mpcg; |
3c09e264 UB |
1767 | struct channel *wch = priv->channel[CTCM_WRITE]; |
1768 | struct channel *rch = priv->channel[CTCM_READ]; | |
293d984f PT |
1769 | struct sk_buff *skb; |
1770 | struct th_sweep *header; | |
1771 | int rc = 0; | |
1772 | unsigned long saveflags = 0; | |
1773 | ||
aa3f2cb6 PT |
1774 | CTCM_PR_DEBUG("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s\n", |
1775 | __func__, smp_processor_id(), ach, ach->id); | |
293d984f PT |
1776 | |
1777 | if (grp->in_sweep == 0) | |
1778 | goto done; | |
1779 | ||
aa3f2cb6 PT |
1780 | CTCM_PR_DBGDATA("%s: 1: ToVTAM_th_seq= %08x\n" , |
1781 | __func__, wch->th_seq_num); | |
1782 | CTCM_PR_DBGDATA("%s: 1: FromVTAM_th_seq= %08x\n" , | |
1783 | __func__, rch->th_seq_num); | |
293d984f PT |
1784 | |
1785 | if (fsm_getstate(wch->fsm) != CTC_STATE_TXIDLE) { | |
1786 | /* give the previous IO time to complete */ | |
1787 | fsm_addtimer(&wch->sweep_timer, | |
1788 | 200, CTC_EVENT_RSWEEP_TIMER, wch); | |
1789 | goto done; | |
1790 | } | |
1791 | ||
1792 | skb = skb_dequeue(&wch->sweep_queue); | |
1793 | if (!skb) | |
1794 | goto done; | |
1795 | ||
1796 | if (set_normalized_cda(&wch->ccw[4], skb->data)) { | |
1797 | grp->in_sweep = 0; | |
1798 | ctcm_clear_busy_do(dev); | |
1799 | dev_kfree_skb_any(skb); | |
1800 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1801 | goto done; | |
1802 | } else { | |
1803 | atomic_inc(&skb->users); | |
1804 | skb_queue_tail(&wch->io_queue, skb); | |
1805 | } | |
1806 | ||
1807 | /* send out the sweep */ | |
1808 | wch->ccw[4].count = skb->len; | |
1809 | ||
1810 | header = (struct th_sweep *)skb->data; | |
1811 | switch (header->th.th_ch_flag) { | |
1812 | case TH_SWEEP_REQ: | |
1813 | grp->sweep_req_pend_num--; | |
1814 | break; | |
1815 | case TH_SWEEP_RESP: | |
1816 | grp->sweep_rsp_pend_num--; | |
1817 | break; | |
1818 | } | |
1819 | ||
1820 | header->sw.th_last_seq = wch->th_seq_num; | |
1821 | ||
aa3f2cb6 PT |
1822 | CTCM_CCW_DUMP((char *)&wch->ccw[3], sizeof(struct ccw1) * 3); |
1823 | CTCM_PR_DBGDATA("%s: sweep packet\n", __func__); | |
1824 | CTCM_D3_DUMP((char *)header, TH_SWEEP_LENGTH); | |
293d984f PT |
1825 | |
1826 | fsm_addtimer(&wch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, wch); | |
1827 | fsm_newstate(wch->fsm, CTC_STATE_TX); | |
1828 | ||
1829 | spin_lock_irqsave(get_ccwdev_lock(wch->cdev), saveflags); | |
1830 | wch->prof.send_stamp = current_kernel_time(); /* xtime */ | |
1831 | rc = ccw_device_start(wch->cdev, &wch->ccw[3], | |
1832 | (unsigned long) wch, 0xff, 0); | |
1833 | spin_unlock_irqrestore(get_ccwdev_lock(wch->cdev), saveflags); | |
1834 | ||
1835 | if ((grp->sweep_req_pend_num == 0) && | |
1836 | (grp->sweep_rsp_pend_num == 0)) { | |
1837 | grp->in_sweep = 0; | |
1838 | rch->th_seq_num = 0x00; | |
1839 | wch->th_seq_num = 0x00; | |
1840 | ctcm_clear_busy_do(dev); | |
1841 | } | |
1842 | ||
aa3f2cb6 PT |
1843 | CTCM_PR_DBGDATA("%s: To-/From-VTAM_th_seq = %08x/%08x\n" , |
1844 | __func__, wch->th_seq_num, rch->th_seq_num); | |
293d984f PT |
1845 | |
1846 | if (rc != 0) | |
1847 | ctcm_ccw_check_rc(wch, rc, "send sweep"); | |
1848 | ||
1849 | done: | |
293d984f PT |
1850 | return; |
1851 | } | |
1852 | ||
1853 | ||
1854 | /* | |
1855 | * The ctcmpc statemachine for a channel. | |
1856 | */ | |
1857 | ||
1858 | const fsm_node ctcmpc_ch_fsm[] = { | |
1859 | { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop }, | |
1860 | { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start }, | |
1861 | { CTC_STATE_STOPPED, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1862 | { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1863 | { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop }, | |
1864 | ||
1865 | { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop }, | |
1866 | { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop }, | |
1867 | { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1868 | { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop }, | |
1869 | { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start }, | |
1870 | { CTC_STATE_NOTOP, CTC_EVENT_UC_RCRESET, ctcm_chx_stop }, | |
1871 | { CTC_STATE_NOTOP, CTC_EVENT_UC_RSRESET, ctcm_chx_stop }, | |
1872 | { CTC_STATE_NOTOP, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1873 | ||
1874 | { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1875 | { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop }, | |
1876 | { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, | |
1877 | { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr }, | |
1878 | { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1879 | { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1880 | ||
1881 | { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1882 | { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode }, | |
1883 | { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, | |
1884 | { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1885 | { CTC_STATE_STARTRETRY, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1886 | ||
1887 | { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1888 | { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop }, | |
1889 | { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio }, | |
1890 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1891 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1892 | { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode }, | |
1893 | { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1894 | { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1895 | ||
1896 | { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1897 | { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop }, | |
1898 | { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, ctcmpc_chx_rxidle }, | |
1899 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr }, | |
1900 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr }, | |
1901 | { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr }, | |
1902 | { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail }, | |
1903 | { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1904 | { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, ctcmpc_chx_firstio }, | |
1905 | { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1906 | ||
1907 | { CH_XID0_PENDING, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1908 | { CH_XID0_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1909 | { CH_XID0_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1910 | { CH_XID0_PENDING, CTC_EVENT_START, ctcm_action_nop }, | |
1911 | { CH_XID0_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1912 | { CH_XID0_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1913 | { CH_XID0_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1914 | { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1915 | { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1916 | { CH_XID0_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1917 | ||
1918 | { CH_XID0_INPROGRESS, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1919 | { CH_XID0_INPROGRESS, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1920 | { CH_XID0_INPROGRESS, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1921 | { CH_XID0_INPROGRESS, CTC_EVENT_START, ctcm_action_nop }, | |
1922 | { CH_XID0_INPROGRESS, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1923 | { CH_XID0_INPROGRESS, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1924 | { CH_XID0_INPROGRESS, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1925 | { CH_XID0_INPROGRESS, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1926 | { CH_XID0_INPROGRESS, CTC_EVENT_ATTNBUSY, ctcmpc_chx_attnbusy }, | |
1927 | { CH_XID0_INPROGRESS, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1928 | { CH_XID0_INPROGRESS, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1929 | ||
1930 | { CH_XID7_PENDING, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1931 | { CH_XID7_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1932 | { CH_XID7_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1933 | { CH_XID7_PENDING, CTC_EVENT_START, ctcm_action_nop }, | |
1934 | { CH_XID7_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1935 | { CH_XID7_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1936 | { CH_XID7_PENDING, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1937 | { CH_XID7_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1938 | { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1939 | { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1940 | { CH_XID7_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1941 | { CH_XID7_PENDING, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1942 | { CH_XID7_PENDING, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1943 | ||
1944 | { CH_XID7_PENDING1, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1945 | { CH_XID7_PENDING1, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1946 | { CH_XID7_PENDING1, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1947 | { CH_XID7_PENDING1, CTC_EVENT_START, ctcm_action_nop }, | |
1948 | { CH_XID7_PENDING1, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1949 | { CH_XID7_PENDING1, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1950 | { CH_XID7_PENDING1, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1951 | { CH_XID7_PENDING1, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1952 | { CH_XID7_PENDING1, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1953 | { CH_XID7_PENDING1, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1954 | { CH_XID7_PENDING1, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1955 | { CH_XID7_PENDING1, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1956 | ||
1957 | { CH_XID7_PENDING2, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1958 | { CH_XID7_PENDING2, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1959 | { CH_XID7_PENDING2, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1960 | { CH_XID7_PENDING2, CTC_EVENT_START, ctcm_action_nop }, | |
1961 | { CH_XID7_PENDING2, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1962 | { CH_XID7_PENDING2, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1963 | { CH_XID7_PENDING2, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1964 | { CH_XID7_PENDING2, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1965 | { CH_XID7_PENDING2, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1966 | { CH_XID7_PENDING2, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1967 | { CH_XID7_PENDING2, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1968 | { CH_XID7_PENDING2, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1969 | ||
1970 | { CH_XID7_PENDING3, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1971 | { CH_XID7_PENDING3, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1972 | { CH_XID7_PENDING3, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1973 | { CH_XID7_PENDING3, CTC_EVENT_START, ctcm_action_nop }, | |
1974 | { CH_XID7_PENDING3, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1975 | { CH_XID7_PENDING3, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1976 | { CH_XID7_PENDING3, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1977 | { CH_XID7_PENDING3, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1978 | { CH_XID7_PENDING3, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1979 | { CH_XID7_PENDING3, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1980 | { CH_XID7_PENDING3, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1981 | { CH_XID7_PENDING3, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1982 | ||
1983 | { CH_XID7_PENDING4, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1984 | { CH_XID7_PENDING4, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1985 | { CH_XID7_PENDING4, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1986 | { CH_XID7_PENDING4, CTC_EVENT_START, ctcm_action_nop }, | |
1987 | { CH_XID7_PENDING4, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1988 | { CH_XID7_PENDING4, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1989 | { CH_XID7_PENDING4, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1990 | { CH_XID7_PENDING4, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1991 | { CH_XID7_PENDING4, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1992 | { CH_XID7_PENDING4, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1993 | { CH_XID7_PENDING4, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1994 | { CH_XID7_PENDING4, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1995 | ||
1996 | { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1997 | { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop }, | |
1998 | { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1999 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc }, | |
2000 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail }, | |
2001 | { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2002 | { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2003 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
2004 | ||
2005 | { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2006 | { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop }, | |
2007 | { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle }, | |
2008 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr }, | |
2009 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr }, | |
2010 | { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr }, | |
2011 | { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2012 | { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2013 | { CTC_STATE_TXINIT, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep }, | |
2014 | ||
2015 | { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2016 | { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop }, | |
2017 | { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio }, | |
2018 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_fail }, | |
2019 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail }, | |
2020 | { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2021 | { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2022 | { CTC_STATE_TXIDLE, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep }, | |
2023 | ||
2024 | { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop }, | |
2025 | { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart }, | |
2026 | { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped }, | |
2027 | { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, | |
2028 | { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, | |
2029 | { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2030 | { CTC_STATE_TERM, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
2031 | { CTC_STATE_TERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2032 | ||
2033 | { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2034 | { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart }, | |
2035 | { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, | |
2036 | { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, | |
2037 | { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, | |
2038 | { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2039 | { CTC_STATE_DTERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2040 | ||
2041 | { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2042 | { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop }, | |
2043 | { CTC_STATE_TX, CTC_EVENT_FINSTAT, ctcmpc_chx_txdone }, | |
2044 | { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_fail }, | |
2045 | { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_fail }, | |
2046 | { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry }, | |
2047 | { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2048 | { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2049 | { CTC_STATE_TX, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep }, | |
2050 | { CTC_STATE_TX, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
2051 | ||
2052 | { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2053 | { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2054 | { CTC_STATE_TXERR, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2055 | { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2056 | { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2057 | }; | |
2058 | ||
2059 | int mpc_ch_fsm_len = ARRAY_SIZE(ctcmpc_ch_fsm); | |
2060 | ||
2061 | /* | |
2062 | * Actions for interface - statemachine. | |
2063 | */ | |
2064 | ||
2065 | /** | |
2066 | * Startup channels by sending CTC_EVENT_START to each channel. | |
2067 | * | |
2068 | * fi An instance of an interface statemachine. | |
2069 | * event The event, just happened. | |
2070 | * arg Generic pointer, casted from struct net_device * upon call. | |
2071 | */ | |
2072 | static void dev_action_start(fsm_instance *fi, int event, void *arg) | |
2073 | { | |
2074 | struct net_device *dev = arg; | |
261893d3 | 2075 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
2076 | int direction; |
2077 | ||
2078 | CTCMY_DBF_DEV_NAME(SETUP, dev, ""); | |
2079 | ||
2080 | fsm_deltimer(&priv->restart_timer); | |
2081 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX); | |
2082 | if (IS_MPC(priv)) | |
2083 | priv->mpcg->channels_terminating = 0; | |
3c09e264 | 2084 | for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) { |
293d984f PT |
2085 | struct channel *ch = priv->channel[direction]; |
2086 | fsm_event(ch->fsm, CTC_EVENT_START, ch); | |
2087 | } | |
2088 | } | |
2089 | ||
2090 | /** | |
2091 | * Shutdown channels by sending CTC_EVENT_STOP to each channel. | |
2092 | * | |
2093 | * fi An instance of an interface statemachine. | |
2094 | * event The event, just happened. | |
2095 | * arg Generic pointer, casted from struct net_device * upon call. | |
2096 | */ | |
2097 | static void dev_action_stop(fsm_instance *fi, int event, void *arg) | |
2098 | { | |
2099 | int direction; | |
2100 | struct net_device *dev = arg; | |
261893d3 | 2101 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
2102 | |
2103 | CTCMY_DBF_DEV_NAME(SETUP, dev, ""); | |
2104 | ||
2105 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX); | |
3c09e264 | 2106 | for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) { |
293d984f PT |
2107 | struct channel *ch = priv->channel[direction]; |
2108 | fsm_event(ch->fsm, CTC_EVENT_STOP, ch); | |
2109 | ch->th_seq_num = 0x00; | |
aa3f2cb6 PT |
2110 | CTCM_PR_DEBUG("%s: CH_th_seq= %08x\n", |
2111 | __func__, ch->th_seq_num); | |
293d984f PT |
2112 | } |
2113 | if (IS_MPC(priv)) | |
2114 | fsm_newstate(priv->mpcg->fsm, MPCG_STATE_RESET); | |
2115 | } | |
2116 | ||
2117 | static void dev_action_restart(fsm_instance *fi, int event, void *arg) | |
2118 | { | |
2119 | int restart_timer; | |
2120 | struct net_device *dev = arg; | |
261893d3 | 2121 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
2122 | |
2123 | CTCMY_DBF_DEV_NAME(TRACE, dev, ""); | |
2124 | ||
2125 | if (IS_MPC(priv)) { | |
293d984f PT |
2126 | restart_timer = CTCM_TIME_1_SEC; |
2127 | } else { | |
293d984f PT |
2128 | restart_timer = CTCM_TIME_5_SEC; |
2129 | } | |
2a7c6f2c | 2130 | dev_info(&dev->dev, "Restarting device\n"); |
293d984f PT |
2131 | |
2132 | dev_action_stop(fi, event, arg); | |
2133 | fsm_event(priv->fsm, DEV_EVENT_STOP, dev); | |
2134 | if (IS_MPC(priv)) | |
2135 | fsm_newstate(priv->mpcg->fsm, MPCG_STATE_RESET); | |
2136 | ||
2137 | /* going back into start sequence too quickly can */ | |
2138 | /* result in the other side becoming unreachable due */ | |
2139 | /* to sense reported when IO is aborted */ | |
2140 | fsm_addtimer(&priv->restart_timer, restart_timer, | |
2141 | DEV_EVENT_START, dev); | |
2142 | } | |
2143 | ||
2144 | /** | |
2145 | * Called from channel statemachine | |
2146 | * when a channel is up and running. | |
2147 | * | |
2148 | * fi An instance of an interface statemachine. | |
2149 | * event The event, just happened. | |
2150 | * arg Generic pointer, casted from struct net_device * upon call. | |
2151 | */ | |
2152 | static void dev_action_chup(fsm_instance *fi, int event, void *arg) | |
2153 | { | |
2154 | struct net_device *dev = arg; | |
261893d3 | 2155 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 2156 | int dev_stat = fsm_getstate(fi); |
293d984f | 2157 | |
aa3f2cb6 PT |
2158 | CTCM_DBF_TEXT_(SETUP, CTC_DBF_NOTICE, |
2159 | "%s(%s): priv = %p [%d,%d]\n ", CTCM_FUNTAIL, | |
261893d3 | 2160 | dev->name, dev->ml_priv, dev_stat, event); |
293d984f PT |
2161 | |
2162 | switch (fsm_getstate(fi)) { | |
2163 | case DEV_STATE_STARTWAIT_RXTX: | |
2164 | if (event == DEV_EVENT_RXUP) | |
2165 | fsm_newstate(fi, DEV_STATE_STARTWAIT_TX); | |
2166 | else | |
2167 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RX); | |
2168 | break; | |
2169 | case DEV_STATE_STARTWAIT_RX: | |
2170 | if (event == DEV_EVENT_RXUP) { | |
2171 | fsm_newstate(fi, DEV_STATE_RUNNING); | |
2a7c6f2c PT |
2172 | dev_info(&dev->dev, |
2173 | "Connected with remote side\n"); | |
293d984f PT |
2174 | ctcm_clear_busy(dev); |
2175 | } | |
2176 | break; | |
2177 | case DEV_STATE_STARTWAIT_TX: | |
2178 | if (event == DEV_EVENT_TXUP) { | |
2179 | fsm_newstate(fi, DEV_STATE_RUNNING); | |
2a7c6f2c PT |
2180 | dev_info(&dev->dev, |
2181 | "Connected with remote side\n"); | |
293d984f PT |
2182 | ctcm_clear_busy(dev); |
2183 | } | |
2184 | break; | |
2185 | case DEV_STATE_STOPWAIT_TX: | |
2186 | if (event == DEV_EVENT_RXUP) | |
2187 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX); | |
2188 | break; | |
2189 | case DEV_STATE_STOPWAIT_RX: | |
2190 | if (event == DEV_EVENT_TXUP) | |
2191 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX); | |
2192 | break; | |
2193 | } | |
2194 | ||
2195 | if (IS_MPC(priv)) { | |
2196 | if (event == DEV_EVENT_RXUP) | |
3c09e264 UB |
2197 | mpc_channel_action(priv->channel[CTCM_READ], |
2198 | CTCM_READ, MPC_CHANNEL_ADD); | |
293d984f | 2199 | else |
3c09e264 UB |
2200 | mpc_channel_action(priv->channel[CTCM_WRITE], |
2201 | CTCM_WRITE, MPC_CHANNEL_ADD); | |
293d984f PT |
2202 | } |
2203 | } | |
2204 | ||
2205 | /** | |
2206 | * Called from device statemachine | |
2207 | * when a channel has been shutdown. | |
2208 | * | |
2209 | * fi An instance of an interface statemachine. | |
2210 | * event The event, just happened. | |
2211 | * arg Generic pointer, casted from struct net_device * upon call. | |
2212 | */ | |
2213 | static void dev_action_chdown(fsm_instance *fi, int event, void *arg) | |
2214 | { | |
2215 | ||
2216 | struct net_device *dev = arg; | |
261893d3 | 2217 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
2218 | |
2219 | CTCMY_DBF_DEV_NAME(SETUP, dev, ""); | |
2220 | ||
2221 | switch (fsm_getstate(fi)) { | |
2222 | case DEV_STATE_RUNNING: | |
2223 | if (event == DEV_EVENT_TXDOWN) | |
2224 | fsm_newstate(fi, DEV_STATE_STARTWAIT_TX); | |
2225 | else | |
2226 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RX); | |
2227 | break; | |
2228 | case DEV_STATE_STARTWAIT_RX: | |
2229 | if (event == DEV_EVENT_TXDOWN) | |
2230 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX); | |
2231 | break; | |
2232 | case DEV_STATE_STARTWAIT_TX: | |
2233 | if (event == DEV_EVENT_RXDOWN) | |
2234 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX); | |
2235 | break; | |
2236 | case DEV_STATE_STOPWAIT_RXTX: | |
2237 | if (event == DEV_EVENT_TXDOWN) | |
2238 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RX); | |
2239 | else | |
2240 | fsm_newstate(fi, DEV_STATE_STOPWAIT_TX); | |
2241 | break; | |
2242 | case DEV_STATE_STOPWAIT_RX: | |
2243 | if (event == DEV_EVENT_RXDOWN) | |
2244 | fsm_newstate(fi, DEV_STATE_STOPPED); | |
2245 | break; | |
2246 | case DEV_STATE_STOPWAIT_TX: | |
2247 | if (event == DEV_EVENT_TXDOWN) | |
2248 | fsm_newstate(fi, DEV_STATE_STOPPED); | |
2249 | break; | |
2250 | } | |
2251 | if (IS_MPC(priv)) { | |
2252 | if (event == DEV_EVENT_RXDOWN) | |
3c09e264 UB |
2253 | mpc_channel_action(priv->channel[CTCM_READ], |
2254 | CTCM_READ, MPC_CHANNEL_REMOVE); | |
293d984f | 2255 | else |
3c09e264 UB |
2256 | mpc_channel_action(priv->channel[CTCM_WRITE], |
2257 | CTCM_WRITE, MPC_CHANNEL_REMOVE); | |
293d984f PT |
2258 | } |
2259 | } | |
2260 | ||
2261 | const fsm_node dev_fsm[] = { | |
2262 | { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start }, | |
2263 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_START, dev_action_start }, | |
2264 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2265 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2266 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart }, | |
2267 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_START, dev_action_start }, | |
2268 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXUP, dev_action_chup }, | |
2269 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_TXUP, dev_action_chup }, | |
2270 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2271 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RESTART, dev_action_restart }, | |
2272 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_START, dev_action_start }, | |
2273 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RXUP, dev_action_chup }, | |
2274 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXUP, dev_action_chup }, | |
2275 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2276 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RESTART, dev_action_restart }, | |
2277 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_STOP, dev_action_stop }, | |
2278 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXUP, dev_action_chup }, | |
2279 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXUP, dev_action_chup }, | |
2280 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2281 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2282 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart }, | |
2283 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_STOP, dev_action_stop }, | |
2284 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXUP, dev_action_chup }, | |
2285 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_TXUP, dev_action_chup }, | |
2286 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2287 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RESTART, dev_action_restart }, | |
2288 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_STOP, dev_action_stop }, | |
2289 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RXUP, dev_action_chup }, | |
2290 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXUP, dev_action_chup }, | |
2291 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2292 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RESTART, dev_action_restart }, | |
2293 | { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop }, | |
2294 | { DEV_STATE_RUNNING, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2295 | { DEV_STATE_RUNNING, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2296 | { DEV_STATE_RUNNING, DEV_EVENT_TXUP, ctcm_action_nop }, | |
2297 | { DEV_STATE_RUNNING, DEV_EVENT_RXUP, ctcm_action_nop }, | |
2298 | { DEV_STATE_RUNNING, DEV_EVENT_RESTART, dev_action_restart }, | |
2299 | }; | |
2300 | ||
2301 | int dev_fsm_len = ARRAY_SIZE(dev_fsm); | |
2302 | ||
2303 | /* --- This is the END my friend --- */ | |
2304 |