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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
293d984f | 2 | /* |
293d984f PT |
3 | * Copyright IBM Corp. 2001, 2007 |
4 | * Authors: Fritz Elfert (felfert@millenux.com) | |
5 | * Peter Tiedemann (ptiedem@de.ibm.com) | |
6 | * MPC additions : | |
7 | * Belinda Thompson (belindat@us.ibm.com) | |
8 | * Andy Richter (richtera@us.ibm.com) | |
9 | */ | |
10 | ||
11 | #undef DEBUG | |
12 | #undef DEBUGDATA | |
13 | #undef DEBUGCCW | |
14 | ||
2a7c6f2c PT |
15 | #define KMSG_COMPONENT "ctcm" |
16 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
17 | ||
293d984f PT |
18 | #include <linux/module.h> |
19 | #include <linux/init.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/errno.h> | |
23 | #include <linux/types.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/timer.h> | |
26 | #include <linux/bitops.h> | |
27 | ||
28 | #include <linux/signal.h> | |
29 | #include <linux/string.h> | |
30 | ||
31 | #include <linux/ip.h> | |
32 | #include <linux/if_arp.h> | |
33 | #include <linux/tcp.h> | |
34 | #include <linux/skbuff.h> | |
35 | #include <linux/ctype.h> | |
36 | #include <net/dst.h> | |
37 | ||
38 | #include <linux/io.h> | |
39 | #include <asm/ccwdev.h> | |
40 | #include <asm/ccwgroup.h> | |
41 | #include <linux/uaccess.h> | |
42 | ||
43 | #include <asm/idals.h> | |
44 | ||
45 | #include "fsm.h" | |
293d984f PT |
46 | |
47 | #include "ctcm_dbug.h" | |
48 | #include "ctcm_main.h" | |
49 | #include "ctcm_fsms.h" | |
50 | ||
51 | const char *dev_state_names[] = { | |
52 | [DEV_STATE_STOPPED] = "Stopped", | |
53 | [DEV_STATE_STARTWAIT_RXTX] = "StartWait RXTX", | |
54 | [DEV_STATE_STARTWAIT_RX] = "StartWait RX", | |
55 | [DEV_STATE_STARTWAIT_TX] = "StartWait TX", | |
56 | [DEV_STATE_STOPWAIT_RXTX] = "StopWait RXTX", | |
57 | [DEV_STATE_STOPWAIT_RX] = "StopWait RX", | |
58 | [DEV_STATE_STOPWAIT_TX] = "StopWait TX", | |
59 | [DEV_STATE_RUNNING] = "Running", | |
60 | }; | |
61 | ||
62 | const char *dev_event_names[] = { | |
63 | [DEV_EVENT_START] = "Start", | |
64 | [DEV_EVENT_STOP] = "Stop", | |
65 | [DEV_EVENT_RXUP] = "RX up", | |
66 | [DEV_EVENT_TXUP] = "TX up", | |
67 | [DEV_EVENT_RXDOWN] = "RX down", | |
68 | [DEV_EVENT_TXDOWN] = "TX down", | |
69 | [DEV_EVENT_RESTART] = "Restart", | |
70 | }; | |
71 | ||
72 | const char *ctc_ch_event_names[] = { | |
73 | [CTC_EVENT_IO_SUCCESS] = "ccw_device success", | |
74 | [CTC_EVENT_IO_EBUSY] = "ccw_device busy", | |
75 | [CTC_EVENT_IO_ENODEV] = "ccw_device enodev", | |
76 | [CTC_EVENT_IO_UNKNOWN] = "ccw_device unknown", | |
77 | [CTC_EVENT_ATTNBUSY] = "Status ATTN & BUSY", | |
78 | [CTC_EVENT_ATTN] = "Status ATTN", | |
79 | [CTC_EVENT_BUSY] = "Status BUSY", | |
80 | [CTC_EVENT_UC_RCRESET] = "Unit check remote reset", | |
81 | [CTC_EVENT_UC_RSRESET] = "Unit check remote system reset", | |
82 | [CTC_EVENT_UC_TXTIMEOUT] = "Unit check TX timeout", | |
83 | [CTC_EVENT_UC_TXPARITY] = "Unit check TX parity", | |
84 | [CTC_EVENT_UC_HWFAIL] = "Unit check Hardware failure", | |
85 | [CTC_EVENT_UC_RXPARITY] = "Unit check RX parity", | |
86 | [CTC_EVENT_UC_ZERO] = "Unit check ZERO", | |
87 | [CTC_EVENT_UC_UNKNOWN] = "Unit check Unknown", | |
88 | [CTC_EVENT_SC_UNKNOWN] = "SubChannel check Unknown", | |
89 | [CTC_EVENT_MC_FAIL] = "Machine check failure", | |
90 | [CTC_EVENT_MC_GOOD] = "Machine check operational", | |
91 | [CTC_EVENT_IRQ] = "IRQ normal", | |
92 | [CTC_EVENT_FINSTAT] = "IRQ final", | |
93 | [CTC_EVENT_TIMER] = "Timer", | |
94 | [CTC_EVENT_START] = "Start", | |
95 | [CTC_EVENT_STOP] = "Stop", | |
96 | /* | |
97 | * additional MPC events | |
98 | */ | |
99 | [CTC_EVENT_SEND_XID] = "XID Exchange", | |
100 | [CTC_EVENT_RSWEEP_TIMER] = "MPC Group Sweep Timer", | |
101 | }; | |
102 | ||
103 | const char *ctc_ch_state_names[] = { | |
104 | [CTC_STATE_IDLE] = "Idle", | |
105 | [CTC_STATE_STOPPED] = "Stopped", | |
106 | [CTC_STATE_STARTWAIT] = "StartWait", | |
107 | [CTC_STATE_STARTRETRY] = "StartRetry", | |
108 | [CTC_STATE_SETUPWAIT] = "SetupWait", | |
109 | [CTC_STATE_RXINIT] = "RX init", | |
110 | [CTC_STATE_TXINIT] = "TX init", | |
111 | [CTC_STATE_RX] = "RX", | |
112 | [CTC_STATE_TX] = "TX", | |
113 | [CTC_STATE_RXIDLE] = "RX idle", | |
114 | [CTC_STATE_TXIDLE] = "TX idle", | |
115 | [CTC_STATE_RXERR] = "RX error", | |
116 | [CTC_STATE_TXERR] = "TX error", | |
117 | [CTC_STATE_TERM] = "Terminating", | |
118 | [CTC_STATE_DTERM] = "Restarting", | |
119 | [CTC_STATE_NOTOP] = "Not operational", | |
120 | /* | |
121 | * additional MPC states | |
122 | */ | |
123 | [CH_XID0_PENDING] = "Pending XID0 Start", | |
124 | [CH_XID0_INPROGRESS] = "In XID0 Negotiations ", | |
125 | [CH_XID7_PENDING] = "Pending XID7 P1 Start", | |
126 | [CH_XID7_PENDING1] = "Active XID7 P1 Exchange ", | |
127 | [CH_XID7_PENDING2] = "Pending XID7 P2 Start ", | |
128 | [CH_XID7_PENDING3] = "Active XID7 P2 Exchange ", | |
129 | [CH_XID7_PENDING4] = "XID7 Complete - Pending READY ", | |
130 | }; | |
131 | ||
132 | static void ctcm_action_nop(fsm_instance *fi, int event, void *arg); | |
133 | ||
134 | /* | |
135 | * ----- static ctcm actions for channel statemachine ----- | |
136 | * | |
137 | */ | |
138 | static void chx_txdone(fsm_instance *fi, int event, void *arg); | |
139 | static void chx_rx(fsm_instance *fi, int event, void *arg); | |
140 | static void chx_rxidle(fsm_instance *fi, int event, void *arg); | |
141 | static void chx_firstio(fsm_instance *fi, int event, void *arg); | |
142 | static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg); | |
143 | static void ctcm_chx_start(fsm_instance *fi, int event, void *arg); | |
144 | static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg); | |
145 | static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg); | |
146 | static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg); | |
147 | static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg); | |
148 | static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg); | |
149 | static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg); | |
150 | static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg); | |
151 | static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg); | |
152 | static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg); | |
153 | static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg); | |
154 | static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg); | |
155 | static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg); | |
156 | ||
157 | /* | |
158 | * ----- static ctcmpc actions for ctcmpc channel statemachine ----- | |
159 | * | |
160 | */ | |
161 | static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg); | |
162 | static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg); | |
163 | static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg); | |
164 | /* shared : | |
165 | static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg); | |
166 | static void ctcm_chx_start(fsm_instance *fi, int event, void *arg); | |
167 | static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg); | |
168 | static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg); | |
169 | static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg); | |
170 | static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg); | |
171 | static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg); | |
172 | static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg); | |
173 | static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg); | |
174 | static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg); | |
175 | static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg); | |
176 | static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg); | |
177 | static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg); | |
178 | static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg); | |
179 | */ | |
180 | static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg); | |
181 | static void ctcmpc_chx_attnbusy(fsm_instance *, int, void *); | |
182 | static void ctcmpc_chx_resend(fsm_instance *, int, void *); | |
183 | static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg); | |
184 | ||
185 | /** | |
25985edc | 186 | * Check return code of a preceding ccw_device call, halt_IO etc... |
293d984f PT |
187 | * |
188 | * ch : The channel, the error belongs to. | |
189 | * Returns the error code (!= 0) to inspect. | |
190 | */ | |
191 | void ctcm_ccw_check_rc(struct channel *ch, int rc, char *msg) | |
192 | { | |
193 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, | |
2a7c6f2c PT |
194 | "%s(%s): %s: %04x\n", |
195 | CTCM_FUNTAIL, ch->id, msg, rc); | |
293d984f PT |
196 | switch (rc) { |
197 | case -EBUSY: | |
2a7c6f2c PT |
198 | pr_info("%s: The communication peer is busy\n", |
199 | ch->id); | |
293d984f PT |
200 | fsm_event(ch->fsm, CTC_EVENT_IO_EBUSY, ch); |
201 | break; | |
202 | case -ENODEV: | |
2a7c6f2c PT |
203 | pr_err("%s: The specified target device is not valid\n", |
204 | ch->id); | |
293d984f PT |
205 | fsm_event(ch->fsm, CTC_EVENT_IO_ENODEV, ch); |
206 | break; | |
207 | default: | |
2a7c6f2c PT |
208 | pr_err("An I/O operation resulted in error %04x\n", |
209 | rc); | |
293d984f PT |
210 | fsm_event(ch->fsm, CTC_EVENT_IO_UNKNOWN, ch); |
211 | } | |
212 | } | |
213 | ||
214 | void ctcm_purge_skb_queue(struct sk_buff_head *q) | |
215 | { | |
216 | struct sk_buff *skb; | |
217 | ||
aa3f2cb6 | 218 | CTCM_DBF_TEXT(TRACE, CTC_DBF_DEBUG, __func__); |
293d984f PT |
219 | |
220 | while ((skb = skb_dequeue(q))) { | |
bba5850c | 221 | refcount_dec(&skb->users); |
293d984f PT |
222 | dev_kfree_skb_any(skb); |
223 | } | |
224 | } | |
225 | ||
226 | /** | |
227 | * NOP action for statemachines | |
228 | */ | |
229 | static void ctcm_action_nop(fsm_instance *fi, int event, void *arg) | |
230 | { | |
231 | } | |
232 | ||
233 | /* | |
234 | * Actions for channel - statemachines. | |
235 | */ | |
236 | ||
237 | /** | |
238 | * Normal data has been send. Free the corresponding | |
239 | * skb (it's in io_queue), reset dev->tbusy and | |
240 | * revert to idle state. | |
241 | * | |
242 | * fi An instance of a channel statemachine. | |
243 | * event The event, just happened. | |
244 | * arg Generic pointer, casted from channel * upon call. | |
245 | */ | |
246 | static void chx_txdone(fsm_instance *fi, int event, void *arg) | |
247 | { | |
248 | struct channel *ch = arg; | |
249 | struct net_device *dev = ch->netdev; | |
261893d3 | 250 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
251 | struct sk_buff *skb; |
252 | int first = 1; | |
253 | int i; | |
254 | unsigned long duration; | |
ee6edb97 | 255 | unsigned long done_stamp = jiffies; |
293d984f | 256 | |
aa3f2cb6 PT |
257 | CTCM_PR_DEBUG("%s(%s): %s\n", __func__, ch->id, dev->name); |
258 | ||
ee6edb97 | 259 | duration = done_stamp - ch->prof.send_stamp; |
293d984f PT |
260 | if (duration > ch->prof.tx_time) |
261 | ch->prof.tx_time = duration; | |
262 | ||
23d805b6 | 263 | if (ch->irb->scsw.cmd.count != 0) |
aa3f2cb6 PT |
264 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, |
265 | "%s(%s): TX not complete, remaining %d bytes", | |
266 | CTCM_FUNTAIL, dev->name, ch->irb->scsw.cmd.count); | |
293d984f PT |
267 | fsm_deltimer(&ch->timer); |
268 | while ((skb = skb_dequeue(&ch->io_queue))) { | |
269 | priv->stats.tx_packets++; | |
270 | priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH; | |
271 | if (first) { | |
272 | priv->stats.tx_bytes += 2; | |
273 | first = 0; | |
274 | } | |
bba5850c | 275 | refcount_dec(&skb->users); |
293d984f PT |
276 | dev_kfree_skb_irq(skb); |
277 | } | |
278 | spin_lock(&ch->collect_lock); | |
279 | clear_normalized_cda(&ch->ccw[4]); | |
280 | if (ch->collect_len > 0) { | |
281 | int rc; | |
282 | ||
283 | if (ctcm_checkalloc_buffer(ch)) { | |
284 | spin_unlock(&ch->collect_lock); | |
285 | return; | |
286 | } | |
287 | ch->trans_skb->data = ch->trans_skb_data; | |
288 | skb_reset_tail_pointer(ch->trans_skb); | |
289 | ch->trans_skb->len = 0; | |
290 | if (ch->prof.maxmulti < (ch->collect_len + 2)) | |
291 | ch->prof.maxmulti = ch->collect_len + 2; | |
292 | if (ch->prof.maxcqueue < skb_queue_len(&ch->collect_queue)) | |
293 | ch->prof.maxcqueue = skb_queue_len(&ch->collect_queue); | |
294 | *((__u16 *)skb_put(ch->trans_skb, 2)) = ch->collect_len + 2; | |
295 | i = 0; | |
296 | while ((skb = skb_dequeue(&ch->collect_queue))) { | |
297 | skb_copy_from_linear_data(skb, | |
298 | skb_put(ch->trans_skb, skb->len), skb->len); | |
299 | priv->stats.tx_packets++; | |
300 | priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH; | |
bba5850c | 301 | refcount_dec(&skb->users); |
293d984f PT |
302 | dev_kfree_skb_irq(skb); |
303 | i++; | |
304 | } | |
305 | ch->collect_len = 0; | |
306 | spin_unlock(&ch->collect_lock); | |
307 | ch->ccw[1].count = ch->trans_skb->len; | |
308 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
ee6edb97 | 309 | ch->prof.send_stamp = jiffies; |
293d984f PT |
310 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], |
311 | (unsigned long)ch, 0xff, 0); | |
312 | ch->prof.doios_multi++; | |
313 | if (rc != 0) { | |
314 | priv->stats.tx_dropped += i; | |
315 | priv->stats.tx_errors += i; | |
316 | fsm_deltimer(&ch->timer); | |
317 | ctcm_ccw_check_rc(ch, rc, "chained TX"); | |
318 | } | |
319 | } else { | |
320 | spin_unlock(&ch->collect_lock); | |
321 | fsm_newstate(fi, CTC_STATE_TXIDLE); | |
322 | } | |
323 | ctcm_clear_busy_do(dev); | |
324 | } | |
325 | ||
326 | /** | |
327 | * Initial data is sent. | |
328 | * Notify device statemachine that we are up and | |
329 | * running. | |
330 | * | |
331 | * fi An instance of a channel statemachine. | |
332 | * event The event, just happened. | |
333 | * arg Generic pointer, casted from channel * upon call. | |
334 | */ | |
335 | void ctcm_chx_txidle(fsm_instance *fi, int event, void *arg) | |
336 | { | |
337 | struct channel *ch = arg; | |
338 | struct net_device *dev = ch->netdev; | |
261893d3 | 339 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 340 | |
aa3f2cb6 PT |
341 | CTCM_PR_DEBUG("%s(%s): %s\n", __func__, ch->id, dev->name); |
342 | ||
293d984f PT |
343 | fsm_deltimer(&ch->timer); |
344 | fsm_newstate(fi, CTC_STATE_TXIDLE); | |
345 | fsm_event(priv->fsm, DEV_EVENT_TXUP, ch->netdev); | |
346 | } | |
347 | ||
348 | /** | |
349 | * Got normal data, check for sanity, queue it up, allocate new buffer | |
350 | * trigger bottom half, and initiate next read. | |
351 | * | |
352 | * fi An instance of a channel statemachine. | |
353 | * event The event, just happened. | |
354 | * arg Generic pointer, casted from channel * upon call. | |
355 | */ | |
356 | static void chx_rx(fsm_instance *fi, int event, void *arg) | |
357 | { | |
358 | struct channel *ch = arg; | |
359 | struct net_device *dev = ch->netdev; | |
261893d3 | 360 | struct ctcm_priv *priv = dev->ml_priv; |
23d805b6 | 361 | int len = ch->max_bufsize - ch->irb->scsw.cmd.count; |
293d984f PT |
362 | struct sk_buff *skb = ch->trans_skb; |
363 | __u16 block_len = *((__u16 *)skb->data); | |
364 | int check_len; | |
365 | int rc; | |
366 | ||
367 | fsm_deltimer(&ch->timer); | |
368 | if (len < 8) { | |
aa3f2cb6 PT |
369 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
370 | "%s(%s): got packet with length %d < 8\n", | |
371 | CTCM_FUNTAIL, dev->name, len); | |
293d984f PT |
372 | priv->stats.rx_dropped++; |
373 | priv->stats.rx_length_errors++; | |
374 | goto again; | |
375 | } | |
376 | if (len > ch->max_bufsize) { | |
aa3f2cb6 PT |
377 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
378 | "%s(%s): got packet with length %d > %d\n", | |
379 | CTCM_FUNTAIL, dev->name, len, ch->max_bufsize); | |
293d984f PT |
380 | priv->stats.rx_dropped++; |
381 | priv->stats.rx_length_errors++; | |
382 | goto again; | |
383 | } | |
384 | ||
385 | /* | |
386 | * VM TCP seems to have a bug sending 2 trailing bytes of garbage. | |
387 | */ | |
388 | switch (ch->protocol) { | |
389 | case CTCM_PROTO_S390: | |
390 | case CTCM_PROTO_OS390: | |
391 | check_len = block_len + 2; | |
392 | break; | |
393 | default: | |
394 | check_len = block_len; | |
395 | break; | |
396 | } | |
397 | if ((len < block_len) || (len > check_len)) { | |
aa3f2cb6 PT |
398 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
399 | "%s(%s): got block length %d != rx length %d\n", | |
400 | CTCM_FUNTAIL, dev->name, block_len, len); | |
293d984f PT |
401 | if (do_debug) |
402 | ctcmpc_dump_skb(skb, 0); | |
403 | ||
404 | *((__u16 *)skb->data) = len; | |
405 | priv->stats.rx_dropped++; | |
406 | priv->stats.rx_length_errors++; | |
407 | goto again; | |
408 | } | |
fb8585fc RK |
409 | if (block_len > 2) { |
410 | *((__u16 *)skb->data) = block_len - 2; | |
293d984f PT |
411 | ctcm_unpack_skb(ch, skb); |
412 | } | |
413 | again: | |
414 | skb->data = ch->trans_skb_data; | |
415 | skb_reset_tail_pointer(skb); | |
416 | skb->len = 0; | |
417 | if (ctcm_checkalloc_buffer(ch)) | |
418 | return; | |
419 | ch->ccw[1].count = ch->max_bufsize; | |
420 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
421 | (unsigned long)ch, 0xff, 0); | |
422 | if (rc != 0) | |
423 | ctcm_ccw_check_rc(ch, rc, "normal RX"); | |
424 | } | |
425 | ||
426 | /** | |
427 | * Initialize connection by sending a __u16 of value 0. | |
428 | * | |
429 | * fi An instance of a channel statemachine. | |
430 | * event The event, just happened. | |
431 | * arg Generic pointer, casted from channel * upon call. | |
432 | */ | |
433 | static void chx_firstio(fsm_instance *fi, int event, void *arg) | |
434 | { | |
293d984f | 435 | int rc; |
aa3f2cb6 PT |
436 | struct channel *ch = arg; |
437 | int fsmstate = fsm_getstate(fi); | |
293d984f | 438 | |
aa3f2cb6 PT |
439 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
440 | "%s(%s) : %02x", | |
441 | CTCM_FUNTAIL, ch->id, fsmstate); | |
293d984f | 442 | |
aa3f2cb6 PT |
443 | ch->sense_rc = 0; /* reset unit check report control */ |
444 | if (fsmstate == CTC_STATE_TXIDLE) | |
445 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, | |
446 | "%s(%s): remote side issued READ?, init.\n", | |
447 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
448 | fsm_deltimer(&ch->timer); |
449 | if (ctcm_checkalloc_buffer(ch)) | |
450 | return; | |
aa3f2cb6 | 451 | if ((fsmstate == CTC_STATE_SETUPWAIT) && |
293d984f PT |
452 | (ch->protocol == CTCM_PROTO_OS390)) { |
453 | /* OS/390 resp. z/OS */ | |
3c09e264 | 454 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
293d984f PT |
455 | *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN; |
456 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, | |
457 | CTC_EVENT_TIMER, ch); | |
458 | chx_rxidle(fi, event, arg); | |
459 | } else { | |
460 | struct net_device *dev = ch->netdev; | |
261893d3 | 461 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
462 | fsm_newstate(fi, CTC_STATE_TXIDLE); |
463 | fsm_event(priv->fsm, DEV_EVENT_TXUP, dev); | |
464 | } | |
465 | return; | |
466 | } | |
293d984f PT |
467 | /* |
468 | * Don't setup a timer for receiving the initial RX frame | |
469 | * if in compatibility mode, since VM TCP delays the initial | |
470 | * frame until it has some data to send. | |
471 | */ | |
3c09e264 | 472 | if ((CHANNEL_DIRECTION(ch->flags) == CTCM_WRITE) || |
293d984f PT |
473 | (ch->protocol != CTCM_PROTO_S390)) |
474 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
475 | ||
476 | *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN; | |
477 | ch->ccw[1].count = 2; /* Transfer only length */ | |
478 | ||
3c09e264 | 479 | fsm_newstate(fi, (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) |
293d984f PT |
480 | ? CTC_STATE_RXINIT : CTC_STATE_TXINIT); |
481 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
482 | (unsigned long)ch, 0xff, 0); | |
483 | if (rc != 0) { | |
484 | fsm_deltimer(&ch->timer); | |
485 | fsm_newstate(fi, CTC_STATE_SETUPWAIT); | |
486 | ctcm_ccw_check_rc(ch, rc, "init IO"); | |
487 | } | |
488 | /* | |
489 | * If in compatibility mode since we don't setup a timer, we | |
490 | * also signal RX channel up immediately. This enables us | |
491 | * to send packets early which in turn usually triggers some | |
492 | * reply from VM TCP which brings up the RX channel to it's | |
493 | * final state. | |
494 | */ | |
3c09e264 | 495 | if ((CHANNEL_DIRECTION(ch->flags) == CTCM_READ) && |
293d984f PT |
496 | (ch->protocol == CTCM_PROTO_S390)) { |
497 | struct net_device *dev = ch->netdev; | |
261893d3 | 498 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
499 | fsm_event(priv->fsm, DEV_EVENT_RXUP, dev); |
500 | } | |
501 | } | |
502 | ||
503 | /** | |
504 | * Got initial data, check it. If OK, | |
505 | * notify device statemachine that we are up and | |
506 | * running. | |
507 | * | |
508 | * fi An instance of a channel statemachine. | |
509 | * event The event, just happened. | |
510 | * arg Generic pointer, casted from channel * upon call. | |
511 | */ | |
512 | static void chx_rxidle(fsm_instance *fi, int event, void *arg) | |
513 | { | |
514 | struct channel *ch = arg; | |
515 | struct net_device *dev = ch->netdev; | |
261893d3 | 516 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
517 | __u16 buflen; |
518 | int rc; | |
519 | ||
293d984f PT |
520 | fsm_deltimer(&ch->timer); |
521 | buflen = *((__u16 *)ch->trans_skb->data); | |
aa3f2cb6 PT |
522 | CTCM_PR_DEBUG("%s: %s: Initial RX count = %d\n", |
523 | __func__, dev->name, buflen); | |
293d984f PT |
524 | |
525 | if (buflen >= CTCM_INITIAL_BLOCKLEN) { | |
526 | if (ctcm_checkalloc_buffer(ch)) | |
527 | return; | |
528 | ch->ccw[1].count = ch->max_bufsize; | |
529 | fsm_newstate(fi, CTC_STATE_RXIDLE); | |
530 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
531 | (unsigned long)ch, 0xff, 0); | |
532 | if (rc != 0) { | |
533 | fsm_newstate(fi, CTC_STATE_RXINIT); | |
534 | ctcm_ccw_check_rc(ch, rc, "initial RX"); | |
535 | } else | |
536 | fsm_event(priv->fsm, DEV_EVENT_RXUP, dev); | |
537 | } else { | |
aa3f2cb6 PT |
538 | CTCM_PR_DEBUG("%s: %s: Initial RX count %d not %d\n", |
539 | __func__, dev->name, | |
540 | buflen, CTCM_INITIAL_BLOCKLEN); | |
293d984f PT |
541 | chx_firstio(fi, event, arg); |
542 | } | |
543 | } | |
544 | ||
545 | /** | |
546 | * Set channel into extended mode. | |
547 | * | |
548 | * fi An instance of a channel statemachine. | |
549 | * event The event, just happened. | |
550 | * arg Generic pointer, casted from channel * upon call. | |
551 | */ | |
552 | static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg) | |
553 | { | |
554 | struct channel *ch = arg; | |
555 | int rc; | |
556 | unsigned long saveflags = 0; | |
557 | int timeout = CTCM_TIME_5_SEC; | |
558 | ||
559 | fsm_deltimer(&ch->timer); | |
560 | if (IS_MPC(ch)) { | |
561 | timeout = 1500; | |
aa3f2cb6 PT |
562 | CTCM_PR_DEBUG("enter %s: cp=%i ch=0x%p id=%s\n", |
563 | __func__, smp_processor_id(), ch, ch->id); | |
293d984f PT |
564 | } |
565 | fsm_addtimer(&ch->timer, timeout, CTC_EVENT_TIMER, ch); | |
566 | fsm_newstate(fi, CTC_STATE_SETUPWAIT); | |
aa3f2cb6 | 567 | CTCM_CCW_DUMP((char *)&ch->ccw[6], sizeof(struct ccw1) * 2); |
293d984f PT |
568 | |
569 | if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */ | |
570 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
571 | /* Such conditional locking is undeterministic in | |
572 | * static view. => ignore sparse warnings here. */ | |
573 | ||
574 | rc = ccw_device_start(ch->cdev, &ch->ccw[6], | |
575 | (unsigned long)ch, 0xff, 0); | |
576 | if (event == CTC_EVENT_TIMER) /* see above comments */ | |
577 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
578 | if (rc != 0) { | |
579 | fsm_deltimer(&ch->timer); | |
580 | fsm_newstate(fi, CTC_STATE_STARTWAIT); | |
581 | ctcm_ccw_check_rc(ch, rc, "set Mode"); | |
582 | } else | |
583 | ch->retry = 0; | |
584 | } | |
585 | ||
586 | /** | |
587 | * Setup channel. | |
588 | * | |
589 | * fi An instance of a channel statemachine. | |
590 | * event The event, just happened. | |
591 | * arg Generic pointer, casted from channel * upon call. | |
592 | */ | |
593 | static void ctcm_chx_start(fsm_instance *fi, int event, void *arg) | |
594 | { | |
aa3f2cb6 | 595 | struct channel *ch = arg; |
293d984f | 596 | unsigned long saveflags; |
aa3f2cb6 | 597 | int rc; |
293d984f | 598 | |
aa3f2cb6 | 599 | CTCM_DBF_TEXT_(SETUP, CTC_DBF_INFO, "%s(%s): %s", |
3c09e264 UB |
600 | CTCM_FUNTAIL, ch->id, |
601 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? "RX" : "TX"); | |
293d984f PT |
602 | |
603 | if (ch->trans_skb != NULL) { | |
604 | clear_normalized_cda(&ch->ccw[1]); | |
605 | dev_kfree_skb(ch->trans_skb); | |
606 | ch->trans_skb = NULL; | |
607 | } | |
3c09e264 | 608 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
293d984f PT |
609 | ch->ccw[1].cmd_code = CCW_CMD_READ; |
610 | ch->ccw[1].flags = CCW_FLAG_SLI; | |
611 | ch->ccw[1].count = 0; | |
612 | } else { | |
613 | ch->ccw[1].cmd_code = CCW_CMD_WRITE; | |
614 | ch->ccw[1].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
615 | ch->ccw[1].count = 0; | |
616 | } | |
617 | if (ctcm_checkalloc_buffer(ch)) { | |
aa3f2cb6 PT |
618 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, |
619 | "%s(%s): %s trans_skb alloc delayed " | |
620 | "until first transfer", | |
621 | CTCM_FUNTAIL, ch->id, | |
3c09e264 UB |
622 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? |
623 | "RX" : "TX"); | |
293d984f | 624 | } |
293d984f PT |
625 | ch->ccw[0].cmd_code = CCW_CMD_PREPARE; |
626 | ch->ccw[0].flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
627 | ch->ccw[0].count = 0; | |
628 | ch->ccw[0].cda = 0; | |
629 | ch->ccw[2].cmd_code = CCW_CMD_NOOP; /* jointed CE + DE */ | |
630 | ch->ccw[2].flags = CCW_FLAG_SLI; | |
631 | ch->ccw[2].count = 0; | |
632 | ch->ccw[2].cda = 0; | |
633 | memcpy(&ch->ccw[3], &ch->ccw[0], sizeof(struct ccw1) * 3); | |
634 | ch->ccw[4].cda = 0; | |
635 | ch->ccw[4].flags &= ~CCW_FLAG_IDA; | |
636 | ||
637 | fsm_newstate(fi, CTC_STATE_STARTWAIT); | |
638 | fsm_addtimer(&ch->timer, 1000, CTC_EVENT_TIMER, ch); | |
639 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
640 | rc = ccw_device_halt(ch->cdev, (unsigned long)ch); | |
641 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
642 | if (rc != 0) { | |
643 | if (rc != -EBUSY) | |
644 | fsm_deltimer(&ch->timer); | |
645 | ctcm_ccw_check_rc(ch, rc, "initial HaltIO"); | |
646 | } | |
647 | } | |
648 | ||
649 | /** | |
650 | * Shutdown a channel. | |
651 | * | |
652 | * fi An instance of a channel statemachine. | |
653 | * event The event, just happened. | |
654 | * arg Generic pointer, casted from channel * upon call. | |
655 | */ | |
656 | static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg) | |
657 | { | |
658 | struct channel *ch = arg; | |
659 | unsigned long saveflags = 0; | |
660 | int rc; | |
661 | int oldstate; | |
662 | ||
293d984f PT |
663 | fsm_deltimer(&ch->timer); |
664 | if (IS_MPC(ch)) | |
665 | fsm_deltimer(&ch->sweep_timer); | |
666 | ||
667 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
668 | ||
669 | if (event == CTC_EVENT_STOP) /* only for STOP not yet locked */ | |
670 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
671 | /* Such conditional locking is undeterministic in | |
672 | * static view. => ignore sparse warnings here. */ | |
673 | oldstate = fsm_getstate(fi); | |
674 | fsm_newstate(fi, CTC_STATE_TERM); | |
675 | rc = ccw_device_halt(ch->cdev, (unsigned long)ch); | |
676 | ||
677 | if (event == CTC_EVENT_STOP) | |
678 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
679 | /* see remark above about conditional locking */ | |
680 | ||
681 | if (rc != 0 && rc != -EBUSY) { | |
682 | fsm_deltimer(&ch->timer); | |
683 | if (event != CTC_EVENT_STOP) { | |
684 | fsm_newstate(fi, oldstate); | |
aa3f2cb6 | 685 | ctcm_ccw_check_rc(ch, rc, (char *)__func__); |
293d984f PT |
686 | } |
687 | } | |
688 | } | |
689 | ||
690 | /** | |
691 | * Cleanup helper for chx_fail and chx_stopped | |
692 | * cleanup channels queue and notify interface statemachine. | |
693 | * | |
694 | * fi An instance of a channel statemachine. | |
695 | * state The next state (depending on caller). | |
696 | * ch The channel to operate on. | |
697 | */ | |
698 | static void ctcm_chx_cleanup(fsm_instance *fi, int state, | |
699 | struct channel *ch) | |
700 | { | |
701 | struct net_device *dev = ch->netdev; | |
261893d3 | 702 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 703 | |
aa3f2cb6 PT |
704 | CTCM_DBF_TEXT_(SETUP, CTC_DBF_NOTICE, |
705 | "%s(%s): %s[%d]\n", | |
706 | CTCM_FUNTAIL, dev->name, ch->id, state); | |
293d984f PT |
707 | |
708 | fsm_deltimer(&ch->timer); | |
709 | if (IS_MPC(ch)) | |
710 | fsm_deltimer(&ch->sweep_timer); | |
711 | ||
712 | fsm_newstate(fi, state); | |
713 | if (state == CTC_STATE_STOPPED && ch->trans_skb != NULL) { | |
714 | clear_normalized_cda(&ch->ccw[1]); | |
715 | dev_kfree_skb_any(ch->trans_skb); | |
716 | ch->trans_skb = NULL; | |
717 | } | |
718 | ||
719 | ch->th_seg = 0x00; | |
720 | ch->th_seq_num = 0x00; | |
3c09e264 | 721 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
293d984f PT |
722 | skb_queue_purge(&ch->io_queue); |
723 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
724 | } else { | |
725 | ctcm_purge_skb_queue(&ch->io_queue); | |
726 | if (IS_MPC(ch)) | |
727 | ctcm_purge_skb_queue(&ch->sweep_queue); | |
728 | spin_lock(&ch->collect_lock); | |
729 | ctcm_purge_skb_queue(&ch->collect_queue); | |
730 | ch->collect_len = 0; | |
731 | spin_unlock(&ch->collect_lock); | |
732 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
733 | } | |
734 | } | |
735 | ||
736 | /** | |
737 | * A channel has successfully been halted. | |
738 | * Cleanup it's queue and notify interface statemachine. | |
739 | * | |
740 | * fi An instance of a channel statemachine. | |
741 | * event The event, just happened. | |
742 | * arg Generic pointer, casted from channel * upon call. | |
743 | */ | |
744 | static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg) | |
745 | { | |
293d984f PT |
746 | ctcm_chx_cleanup(fi, CTC_STATE_STOPPED, arg); |
747 | } | |
748 | ||
749 | /** | |
750 | * A stop command from device statemachine arrived and we are in | |
751 | * not operational mode. Set state to stopped. | |
752 | * | |
753 | * fi An instance of a channel statemachine. | |
754 | * event The event, just happened. | |
755 | * arg Generic pointer, casted from channel * upon call. | |
756 | */ | |
757 | static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg) | |
758 | { | |
759 | fsm_newstate(fi, CTC_STATE_STOPPED); | |
760 | } | |
761 | ||
762 | /** | |
763 | * A machine check for no path, not operational status or gone device has | |
764 | * happened. | |
765 | * Cleanup queue and notify interface statemachine. | |
766 | * | |
767 | * fi An instance of a channel statemachine. | |
768 | * event The event, just happened. | |
769 | * arg Generic pointer, casted from channel * upon call. | |
770 | */ | |
771 | static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg) | |
772 | { | |
293d984f PT |
773 | ctcm_chx_cleanup(fi, CTC_STATE_NOTOP, arg); |
774 | } | |
775 | ||
776 | /** | |
777 | * Handle error during setup of channel. | |
778 | * | |
779 | * fi An instance of a channel statemachine. | |
780 | * event The event, just happened. | |
781 | * arg Generic pointer, casted from channel * upon call. | |
782 | */ | |
783 | static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg) | |
784 | { | |
785 | struct channel *ch = arg; | |
786 | struct net_device *dev = ch->netdev; | |
261893d3 | 787 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
788 | |
789 | /* | |
790 | * Special case: Got UC_RCRESET on setmode. | |
791 | * This means that remote side isn't setup. In this case | |
792 | * simply retry after some 10 secs... | |
793 | */ | |
794 | if ((fsm_getstate(fi) == CTC_STATE_SETUPWAIT) && | |
795 | ((event == CTC_EVENT_UC_RCRESET) || | |
796 | (event == CTC_EVENT_UC_RSRESET))) { | |
797 | fsm_newstate(fi, CTC_STATE_STARTRETRY); | |
798 | fsm_deltimer(&ch->timer); | |
799 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
3c09e264 UB |
800 | if (!IS_MPC(ch) && |
801 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ)) { | |
293d984f PT |
802 | int rc = ccw_device_halt(ch->cdev, (unsigned long)ch); |
803 | if (rc != 0) | |
804 | ctcm_ccw_check_rc(ch, rc, | |
805 | "HaltIO in chx_setuperr"); | |
806 | } | |
807 | return; | |
808 | } | |
809 | ||
810 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_CRIT, | |
aa3f2cb6 PT |
811 | "%s(%s) : %s error during %s channel setup state=%s\n", |
812 | CTCM_FUNTAIL, dev->name, ctc_ch_event_names[event], | |
3c09e264 | 813 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? "RX" : "TX", |
293d984f PT |
814 | fsm_getstate_str(fi)); |
815 | ||
3c09e264 | 816 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
293d984f PT |
817 | fsm_newstate(fi, CTC_STATE_RXERR); |
818 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
819 | } else { | |
820 | fsm_newstate(fi, CTC_STATE_TXERR); | |
821 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
822 | } | |
823 | } | |
824 | ||
825 | /** | |
826 | * Restart a channel after an error. | |
827 | * | |
828 | * fi An instance of a channel statemachine. | |
829 | * event The event, just happened. | |
830 | * arg Generic pointer, casted from channel * upon call. | |
831 | */ | |
832 | static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg) | |
833 | { | |
834 | struct channel *ch = arg; | |
835 | struct net_device *dev = ch->netdev; | |
836 | unsigned long saveflags = 0; | |
837 | int oldstate; | |
838 | int rc; | |
839 | ||
aa3f2cb6 PT |
840 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
841 | "%s: %s[%d] of %s\n", | |
842 | CTCM_FUNTAIL, ch->id, event, dev->name); | |
843 | ||
293d984f | 844 | fsm_deltimer(&ch->timer); |
aa3f2cb6 | 845 | |
293d984f PT |
846 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); |
847 | oldstate = fsm_getstate(fi); | |
848 | fsm_newstate(fi, CTC_STATE_STARTWAIT); | |
849 | if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */ | |
850 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
851 | /* Such conditional locking is a known problem for | |
852 | * sparse because its undeterministic in static view. | |
853 | * Warnings should be ignored here. */ | |
854 | rc = ccw_device_halt(ch->cdev, (unsigned long)ch); | |
855 | if (event == CTC_EVENT_TIMER) | |
856 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); | |
857 | if (rc != 0) { | |
858 | if (rc != -EBUSY) { | |
859 | fsm_deltimer(&ch->timer); | |
860 | fsm_newstate(fi, oldstate); | |
861 | } | |
862 | ctcm_ccw_check_rc(ch, rc, "HaltIO in ctcm_chx_restart"); | |
863 | } | |
864 | } | |
865 | ||
866 | /** | |
867 | * Handle error during RX initial handshake (exchange of | |
868 | * 0-length block header) | |
869 | * | |
870 | * fi An instance of a channel statemachine. | |
871 | * event The event, just happened. | |
872 | * arg Generic pointer, casted from channel * upon call. | |
873 | */ | |
874 | static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg) | |
875 | { | |
876 | struct channel *ch = arg; | |
877 | struct net_device *dev = ch->netdev; | |
261893d3 | 878 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 879 | |
293d984f PT |
880 | if (event == CTC_EVENT_TIMER) { |
881 | if (!IS_MPCDEV(dev)) | |
882 | /* TODO : check if MPC deletes timer somewhere */ | |
883 | fsm_deltimer(&ch->timer); | |
293d984f PT |
884 | if (ch->retry++ < 3) |
885 | ctcm_chx_restart(fi, event, arg); | |
886 | else { | |
887 | fsm_newstate(fi, CTC_STATE_RXERR); | |
888 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
889 | } | |
2a7c6f2c PT |
890 | } else { |
891 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, | |
892 | "%s(%s): %s in %s", CTCM_FUNTAIL, ch->id, | |
893 | ctc_ch_event_names[event], fsm_getstate_str(fi)); | |
894 | ||
895 | dev_warn(&dev->dev, | |
896 | "Initialization failed with RX/TX init handshake " | |
897 | "error %s\n", ctc_ch_event_names[event]); | |
898 | } | |
293d984f PT |
899 | } |
900 | ||
901 | /** | |
902 | * Notify device statemachine if we gave up initialization | |
903 | * of RX channel. | |
904 | * | |
905 | * fi An instance of a channel statemachine. | |
906 | * event The event, just happened. | |
907 | * arg Generic pointer, casted from channel * upon call. | |
908 | */ | |
909 | static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg) | |
910 | { | |
911 | struct channel *ch = arg; | |
912 | struct net_device *dev = ch->netdev; | |
261893d3 | 913 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 914 | |
aa3f2cb6 PT |
915 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, |
916 | "%s(%s): RX %s busy, init. fail", | |
917 | CTCM_FUNTAIL, dev->name, ch->id); | |
293d984f | 918 | fsm_newstate(fi, CTC_STATE_RXERR); |
293d984f PT |
919 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); |
920 | } | |
921 | ||
922 | /** | |
923 | * Handle RX Unit check remote reset (remote disconnected) | |
924 | * | |
925 | * fi An instance of a channel statemachine. | |
926 | * event The event, just happened. | |
927 | * arg Generic pointer, casted from channel * upon call. | |
928 | */ | |
929 | static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg) | |
930 | { | |
931 | struct channel *ch = arg; | |
932 | struct channel *ch2; | |
933 | struct net_device *dev = ch->netdev; | |
261893d3 | 934 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 935 | |
aa3f2cb6 PT |
936 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
937 | "%s: %s: remote disconnect - re-init ...", | |
938 | CTCM_FUNTAIL, dev->name); | |
293d984f | 939 | fsm_deltimer(&ch->timer); |
293d984f PT |
940 | /* |
941 | * Notify device statemachine | |
942 | */ | |
943 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
944 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
945 | ||
946 | fsm_newstate(fi, CTC_STATE_DTERM); | |
3c09e264 | 947 | ch2 = priv->channel[CTCM_WRITE]; |
293d984f PT |
948 | fsm_newstate(ch2->fsm, CTC_STATE_DTERM); |
949 | ||
950 | ccw_device_halt(ch->cdev, (unsigned long)ch); | |
951 | ccw_device_halt(ch2->cdev, (unsigned long)ch2); | |
952 | } | |
953 | ||
954 | /** | |
955 | * Handle error during TX channel initialization. | |
956 | * | |
957 | * fi An instance of a channel statemachine. | |
958 | * event The event, just happened. | |
959 | * arg Generic pointer, casted from channel * upon call. | |
960 | */ | |
961 | static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg) | |
962 | { | |
963 | struct channel *ch = arg; | |
964 | struct net_device *dev = ch->netdev; | |
261893d3 | 965 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
966 | |
967 | if (event == CTC_EVENT_TIMER) { | |
968 | fsm_deltimer(&ch->timer); | |
293d984f PT |
969 | if (ch->retry++ < 3) |
970 | ctcm_chx_restart(fi, event, arg); | |
971 | else { | |
972 | fsm_newstate(fi, CTC_STATE_TXERR); | |
973 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
974 | } | |
975 | } else { | |
976 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, | |
aa3f2cb6 PT |
977 | "%s(%s): %s in %s", CTCM_FUNTAIL, ch->id, |
978 | ctc_ch_event_names[event], fsm_getstate_str(fi)); | |
293d984f | 979 | |
2a7c6f2c PT |
980 | dev_warn(&dev->dev, |
981 | "Initialization failed with RX/TX init handshake " | |
982 | "error %s\n", ctc_ch_event_names[event]); | |
293d984f PT |
983 | } |
984 | } | |
985 | ||
986 | /** | |
987 | * Handle TX timeout by retrying operation. | |
988 | * | |
989 | * fi An instance of a channel statemachine. | |
990 | * event The event, just happened. | |
991 | * arg Generic pointer, casted from channel * upon call. | |
992 | */ | |
993 | static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg) | |
994 | { | |
995 | struct channel *ch = arg; | |
996 | struct net_device *dev = ch->netdev; | |
261893d3 | 997 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
998 | struct sk_buff *skb; |
999 | ||
aa3f2cb6 PT |
1000 | CTCM_PR_DEBUG("Enter: %s: cp=%i ch=0x%p id=%s\n", |
1001 | __func__, smp_processor_id(), ch, ch->id); | |
293d984f PT |
1002 | |
1003 | fsm_deltimer(&ch->timer); | |
1004 | if (ch->retry++ > 3) { | |
1005 | struct mpc_group *gptr = priv->mpcg; | |
aa3f2cb6 PT |
1006 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_INFO, |
1007 | "%s: %s: retries exceeded", | |
1008 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1009 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); |
1010 | /* call restart if not MPC or if MPC and mpcg fsm is ready. | |
1011 | use gptr as mpc indicator */ | |
1012 | if (!(gptr && (fsm_getstate(gptr->fsm) != MPCG_STATE_READY))) | |
1013 | ctcm_chx_restart(fi, event, arg); | |
1014 | goto done; | |
1015 | } | |
1016 | ||
aa3f2cb6 PT |
1017 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, |
1018 | "%s : %s: retry %d", | |
1019 | CTCM_FUNTAIL, ch->id, ch->retry); | |
293d984f PT |
1020 | skb = skb_peek(&ch->io_queue); |
1021 | if (skb) { | |
1022 | int rc = 0; | |
1023 | unsigned long saveflags = 0; | |
1024 | clear_normalized_cda(&ch->ccw[4]); | |
1025 | ch->ccw[4].count = skb->len; | |
1026 | if (set_normalized_cda(&ch->ccw[4], skb->data)) { | |
aa3f2cb6 PT |
1027 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_INFO, |
1028 | "%s: %s: IDAL alloc failed", | |
1029 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1030 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); |
1031 | ctcm_chx_restart(fi, event, arg); | |
1032 | goto done; | |
1033 | } | |
1034 | fsm_addtimer(&ch->timer, 1000, CTC_EVENT_TIMER, ch); | |
1035 | if (event == CTC_EVENT_TIMER) /* for TIMER not yet locked */ | |
1036 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
1037 | /* Such conditional locking is a known problem for | |
1038 | * sparse because its undeterministic in static view. | |
1039 | * Warnings should be ignored here. */ | |
1040 | if (do_debug_ccw) | |
1041 | ctcmpc_dumpit((char *)&ch->ccw[3], | |
1042 | sizeof(struct ccw1) * 3); | |
1043 | ||
1044 | rc = ccw_device_start(ch->cdev, &ch->ccw[3], | |
1045 | (unsigned long)ch, 0xff, 0); | |
1046 | if (event == CTC_EVENT_TIMER) | |
1047 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), | |
1048 | saveflags); | |
1049 | if (rc != 0) { | |
1050 | fsm_deltimer(&ch->timer); | |
1051 | ctcm_ccw_check_rc(ch, rc, "TX in chx_txretry"); | |
1052 | ctcm_purge_skb_queue(&ch->io_queue); | |
1053 | } | |
1054 | } | |
1055 | done: | |
1056 | return; | |
1057 | } | |
1058 | ||
1059 | /** | |
1060 | * Handle fatal errors during an I/O command. | |
1061 | * | |
1062 | * fi An instance of a channel statemachine. | |
1063 | * event The event, just happened. | |
1064 | * arg Generic pointer, casted from channel * upon call. | |
1065 | */ | |
1066 | static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg) | |
1067 | { | |
1068 | struct channel *ch = arg; | |
1069 | struct net_device *dev = ch->netdev; | |
261893d3 | 1070 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 1071 | int rd = CHANNEL_DIRECTION(ch->flags); |
293d984f | 1072 | |
293d984f | 1073 | fsm_deltimer(&ch->timer); |
aa3f2cb6 PT |
1074 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, |
1075 | "%s: %s: %s unrecoverable channel error", | |
3c09e264 | 1076 | CTCM_FUNTAIL, ch->id, rd == CTCM_READ ? "RX" : "TX"); |
aa3f2cb6 | 1077 | |
293d984f PT |
1078 | if (IS_MPC(ch)) { |
1079 | priv->stats.tx_dropped++; | |
1080 | priv->stats.tx_errors++; | |
1081 | } | |
3c09e264 | 1082 | if (rd == CTCM_READ) { |
293d984f PT |
1083 | fsm_newstate(fi, CTC_STATE_RXERR); |
1084 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); | |
1085 | } else { | |
293d984f PT |
1086 | fsm_newstate(fi, CTC_STATE_TXERR); |
1087 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); | |
1088 | } | |
1089 | } | |
1090 | ||
1091 | /* | |
1092 | * The ctcm statemachine for a channel. | |
1093 | */ | |
1094 | const fsm_node ch_fsm[] = { | |
1095 | { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop }, | |
1096 | { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start }, | |
1097 | { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1098 | { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop }, | |
1099 | ||
1100 | { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop }, | |
1101 | { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop }, | |
1102 | { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1103 | { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop }, | |
1104 | { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start }, | |
1105 | ||
1106 | { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1107 | { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop }, | |
1108 | { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, | |
1109 | { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr }, | |
1110 | { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1111 | { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1112 | ||
1113 | { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1114 | { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode }, | |
1115 | { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1116 | { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1117 | ||
1118 | { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1119 | { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop }, | |
1120 | { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, chx_firstio }, | |
1121 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1122 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1123 | { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode }, | |
1124 | { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1125 | { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1126 | ||
1127 | { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1128 | { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop }, | |
1129 | { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, chx_rxidle }, | |
1130 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr }, | |
1131 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr }, | |
1132 | { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr }, | |
1133 | { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail }, | |
1134 | { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1135 | { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, chx_firstio }, | |
1136 | { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1137 | ||
1138 | { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1139 | { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop }, | |
1140 | { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, chx_rx }, | |
1141 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc }, | |
1142 | { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1143 | { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1144 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, chx_rx }, | |
1145 | ||
1146 | { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1147 | { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop }, | |
1148 | { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle }, | |
1149 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr }, | |
1150 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr }, | |
1151 | { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr }, | |
1152 | { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1153 | { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1154 | ||
1155 | { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1156 | { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop }, | |
1157 | { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, chx_firstio }, | |
1158 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, | |
1159 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, | |
1160 | { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1161 | { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1162 | ||
1163 | { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop }, | |
1164 | { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart }, | |
1165 | { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped }, | |
1166 | { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, | |
1167 | { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, | |
1168 | { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1169 | ||
1170 | { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1171 | { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart }, | |
1172 | { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, | |
1173 | { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, | |
1174 | { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, | |
1175 | { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1176 | ||
1177 | { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1178 | { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop }, | |
1179 | { CTC_STATE_TX, CTC_EVENT_FINSTAT, chx_txdone }, | |
1180 | { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_txretry }, | |
1181 | { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_txretry }, | |
1182 | { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry }, | |
1183 | { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1184 | { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1185 | ||
1186 | { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1187 | { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1188 | { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1189 | { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1190 | }; | |
1191 | ||
1192 | int ch_fsm_len = ARRAY_SIZE(ch_fsm); | |
1193 | ||
1194 | /* | |
1195 | * MPC actions for mpc channel statemachine | |
1196 | * handling of MPC protocol requires extra | |
1197 | * statemachine and actions which are prefixed ctcmpc_ . | |
1198 | * The ctc_ch_states and ctc_ch_state_names, | |
1199 | * ctc_ch_events and ctc_ch_event_names share the ctcm definitions | |
1200 | * which are expanded by some elements. | |
1201 | */ | |
1202 | ||
1203 | /* | |
1204 | * Actions for mpc channel statemachine. | |
1205 | */ | |
1206 | ||
1207 | /** | |
1208 | * Normal data has been send. Free the corresponding | |
1209 | * skb (it's in io_queue), reset dev->tbusy and | |
1210 | * revert to idle state. | |
1211 | * | |
1212 | * fi An instance of a channel statemachine. | |
1213 | * event The event, just happened. | |
1214 | * arg Generic pointer, casted from channel * upon call. | |
1215 | */ | |
1216 | static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg) | |
1217 | { | |
1218 | struct channel *ch = arg; | |
1219 | struct net_device *dev = ch->netdev; | |
261893d3 | 1220 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1221 | struct mpc_group *grp = priv->mpcg; |
1222 | struct sk_buff *skb; | |
1223 | int first = 1; | |
1224 | int i; | |
293d984f PT |
1225 | __u32 data_space; |
1226 | unsigned long duration; | |
1227 | struct sk_buff *peekskb; | |
1228 | int rc; | |
1229 | struct th_header *header; | |
1230 | struct pdu *p_header; | |
ee6edb97 | 1231 | unsigned long done_stamp = jiffies; |
293d984f | 1232 | |
aa3f2cb6 PT |
1233 | CTCM_PR_DEBUG("Enter %s: %s cp:%i\n", |
1234 | __func__, dev->name, smp_processor_id()); | |
293d984f | 1235 | |
ee6edb97 | 1236 | duration = done_stamp - ch->prof.send_stamp; |
293d984f PT |
1237 | if (duration > ch->prof.tx_time) |
1238 | ch->prof.tx_time = duration; | |
1239 | ||
23d805b6 | 1240 | if (ch->irb->scsw.cmd.count != 0) |
aa3f2cb6 PT |
1241 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
1242 | "%s(%s): TX not complete, remaining %d bytes", | |
1243 | CTCM_FUNTAIL, dev->name, ch->irb->scsw.cmd.count); | |
293d984f PT |
1244 | fsm_deltimer(&ch->timer); |
1245 | while ((skb = skb_dequeue(&ch->io_queue))) { | |
1246 | priv->stats.tx_packets++; | |
1247 | priv->stats.tx_bytes += skb->len - TH_HEADER_LENGTH; | |
1248 | if (first) { | |
1249 | priv->stats.tx_bytes += 2; | |
1250 | first = 0; | |
1251 | } | |
bba5850c | 1252 | refcount_dec(&skb->users); |
293d984f PT |
1253 | dev_kfree_skb_irq(skb); |
1254 | } | |
1255 | spin_lock(&ch->collect_lock); | |
1256 | clear_normalized_cda(&ch->ccw[4]); | |
293d984f PT |
1257 | if ((ch->collect_len <= 0) || (grp->in_sweep != 0)) { |
1258 | spin_unlock(&ch->collect_lock); | |
1259 | fsm_newstate(fi, CTC_STATE_TXIDLE); | |
1260 | goto done; | |
1261 | } | |
1262 | ||
1263 | if (ctcm_checkalloc_buffer(ch)) { | |
1264 | spin_unlock(&ch->collect_lock); | |
1265 | goto done; | |
1266 | } | |
1267 | ch->trans_skb->data = ch->trans_skb_data; | |
1268 | skb_reset_tail_pointer(ch->trans_skb); | |
1269 | ch->trans_skb->len = 0; | |
1270 | if (ch->prof.maxmulti < (ch->collect_len + TH_HEADER_LENGTH)) | |
1271 | ch->prof.maxmulti = ch->collect_len + TH_HEADER_LENGTH; | |
1272 | if (ch->prof.maxcqueue < skb_queue_len(&ch->collect_queue)) | |
1273 | ch->prof.maxcqueue = skb_queue_len(&ch->collect_queue); | |
1274 | i = 0; | |
aa3f2cb6 | 1275 | p_header = NULL; |
293d984f PT |
1276 | data_space = grp->group_max_buflen - TH_HEADER_LENGTH; |
1277 | ||
aa3f2cb6 PT |
1278 | CTCM_PR_DBGDATA("%s: building trans_skb from collect_q" |
1279 | " data_space:%04x\n", | |
1280 | __func__, data_space); | |
1281 | ||
293d984f | 1282 | while ((skb = skb_dequeue(&ch->collect_queue))) { |
59ae1d12 | 1283 | skb_put_data(ch->trans_skb, skb->data, skb->len); |
293d984f PT |
1284 | p_header = (struct pdu *) |
1285 | (skb_tail_pointer(ch->trans_skb) - skb->len); | |
1286 | p_header->pdu_flag = 0x00; | |
5cd77c13 | 1287 | if (be16_to_cpu(skb->protocol) == ETH_P_SNAP) |
293d984f PT |
1288 | p_header->pdu_flag |= 0x60; |
1289 | else | |
1290 | p_header->pdu_flag |= 0x20; | |
1291 | ||
aa3f2cb6 PT |
1292 | CTCM_PR_DBGDATA("%s: trans_skb len:%04x \n", |
1293 | __func__, ch->trans_skb->len); | |
1294 | CTCM_PR_DBGDATA("%s: pdu header and data for up" | |
1295 | " to 32 bytes sent to vtam\n", __func__); | |
1296 | CTCM_D3_DUMP((char *)p_header, min_t(int, skb->len, 32)); | |
1297 | ||
293d984f PT |
1298 | ch->collect_len -= skb->len; |
1299 | data_space -= skb->len; | |
1300 | priv->stats.tx_packets++; | |
1301 | priv->stats.tx_bytes += skb->len; | |
bba5850c | 1302 | refcount_dec(&skb->users); |
293d984f PT |
1303 | dev_kfree_skb_any(skb); |
1304 | peekskb = skb_peek(&ch->collect_queue); | |
1305 | if (peekskb->len > data_space) | |
1306 | break; | |
1307 | i++; | |
1308 | } | |
1309 | /* p_header points to the last one we handled */ | |
1310 | if (p_header) | |
1311 | p_header->pdu_flag |= PDU_LAST; /*Say it's the last one*/ | |
1312 | header = kzalloc(TH_HEADER_LENGTH, gfp_type()); | |
293d984f | 1313 | if (!header) { |
293d984f PT |
1314 | spin_unlock(&ch->collect_lock); |
1315 | fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev); | |
aa3f2cb6 | 1316 | goto done; |
293d984f | 1317 | } |
293d984f PT |
1318 | header->th_ch_flag = TH_HAS_PDU; /* Normal data */ |
1319 | ch->th_seq_num++; | |
1320 | header->th_seq_num = ch->th_seq_num; | |
1321 | ||
aa3f2cb6 PT |
1322 | CTCM_PR_DBGDATA("%s: ToVTAM_th_seq= %08x\n" , |
1323 | __func__, ch->th_seq_num); | |
293d984f PT |
1324 | |
1325 | memcpy(skb_push(ch->trans_skb, TH_HEADER_LENGTH), header, | |
1326 | TH_HEADER_LENGTH); /* put the TH on the packet */ | |
1327 | ||
1328 | kfree(header); | |
1329 | ||
aa3f2cb6 PT |
1330 | CTCM_PR_DBGDATA("%s: trans_skb len:%04x \n", |
1331 | __func__, ch->trans_skb->len); | |
1332 | CTCM_PR_DBGDATA("%s: up-to-50 bytes of trans_skb " | |
1333 | "data to vtam from collect_q\n", __func__); | |
1334 | CTCM_D3_DUMP((char *)ch->trans_skb->data, | |
293d984f | 1335 | min_t(int, ch->trans_skb->len, 50)); |
293d984f PT |
1336 | |
1337 | spin_unlock(&ch->collect_lock); | |
1338 | clear_normalized_cda(&ch->ccw[1]); | |
205a8b64 BT |
1339 | |
1340 | CTCM_PR_DBGDATA("ccwcda=0x%p data=0x%p\n", | |
1341 | (void *)(unsigned long)ch->ccw[1].cda, | |
1342 | ch->trans_skb->data); | |
1343 | ch->ccw[1].count = ch->max_bufsize; | |
1344 | ||
293d984f PT |
1345 | if (set_normalized_cda(&ch->ccw[1], ch->trans_skb->data)) { |
1346 | dev_kfree_skb_any(ch->trans_skb); | |
1347 | ch->trans_skb = NULL; | |
aa3f2cb6 PT |
1348 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ERROR, |
1349 | "%s: %s: IDAL alloc failed", | |
1350 | CTCM_FUNTAIL, ch->id); | |
293d984f PT |
1351 | fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev); |
1352 | return; | |
1353 | } | |
205a8b64 BT |
1354 | |
1355 | CTCM_PR_DBGDATA("ccwcda=0x%p data=0x%p\n", | |
1356 | (void *)(unsigned long)ch->ccw[1].cda, | |
1357 | ch->trans_skb->data); | |
1358 | ||
293d984f PT |
1359 | ch->ccw[1].count = ch->trans_skb->len; |
1360 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); | |
ee6edb97 | 1361 | ch->prof.send_stamp = jiffies; |
293d984f PT |
1362 | if (do_debug_ccw) |
1363 | ctcmpc_dumpit((char *)&ch->ccw[0], sizeof(struct ccw1) * 3); | |
1364 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
1365 | (unsigned long)ch, 0xff, 0); | |
1366 | ch->prof.doios_multi++; | |
1367 | if (rc != 0) { | |
1368 | priv->stats.tx_dropped += i; | |
1369 | priv->stats.tx_errors += i; | |
1370 | fsm_deltimer(&ch->timer); | |
1371 | ctcm_ccw_check_rc(ch, rc, "chained TX"); | |
1372 | } | |
1373 | done: | |
1374 | ctcm_clear_busy(dev); | |
293d984f PT |
1375 | return; |
1376 | } | |
1377 | ||
1378 | /** | |
1379 | * Got normal data, check for sanity, queue it up, allocate new buffer | |
1380 | * trigger bottom half, and initiate next read. | |
1381 | * | |
1382 | * fi An instance of a channel statemachine. | |
1383 | * event The event, just happened. | |
1384 | * arg Generic pointer, casted from channel * upon call. | |
1385 | */ | |
1386 | static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg) | |
1387 | { | |
1388 | struct channel *ch = arg; | |
1389 | struct net_device *dev = ch->netdev; | |
261893d3 | 1390 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1391 | struct mpc_group *grp = priv->mpcg; |
1392 | struct sk_buff *skb = ch->trans_skb; | |
1393 | struct sk_buff *new_skb; | |
aa3f2cb6 | 1394 | unsigned long saveflags = 0; /* avoids compiler warning */ |
23d805b6 | 1395 | int len = ch->max_bufsize - ch->irb->scsw.cmd.count; |
293d984f | 1396 | |
aa3f2cb6 PT |
1397 | CTCM_PR_DEBUG("%s: %s: cp:%i %s maxbuf : %04x, len: %04x\n", |
1398 | CTCM_FUNTAIL, dev->name, smp_processor_id(), | |
1399 | ch->id, ch->max_bufsize, len); | |
293d984f PT |
1400 | fsm_deltimer(&ch->timer); |
1401 | ||
1402 | if (skb == NULL) { | |
aa3f2cb6 PT |
1403 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1404 | "%s(%s): TRANS_SKB = NULL", | |
1405 | CTCM_FUNTAIL, dev->name); | |
1406 | goto again; | |
293d984f PT |
1407 | } |
1408 | ||
1409 | if (len < TH_HEADER_LENGTH) { | |
aa3f2cb6 PT |
1410 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1411 | "%s(%s): packet length %d to short", | |
1412 | CTCM_FUNTAIL, dev->name, len); | |
293d984f PT |
1413 | priv->stats.rx_dropped++; |
1414 | priv->stats.rx_length_errors++; | |
1415 | } else { | |
1416 | /* must have valid th header or game over */ | |
1417 | __u32 block_len = len; | |
1418 | len = TH_HEADER_LENGTH + XID2_LENGTH + 4; | |
1419 | new_skb = __dev_alloc_skb(ch->max_bufsize, GFP_ATOMIC); | |
1420 | ||
1421 | if (new_skb == NULL) { | |
aa3f2cb6 PT |
1422 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1423 | "%s(%d): skb allocation failed", | |
1424 | CTCM_FUNTAIL, dev->name); | |
293d984f PT |
1425 | fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev); |
1426 | goto again; | |
1427 | } | |
1428 | switch (fsm_getstate(grp->fsm)) { | |
1429 | case MPCG_STATE_RESET: | |
1430 | case MPCG_STATE_INOP: | |
1431 | dev_kfree_skb_any(new_skb); | |
1432 | break; | |
1433 | case MPCG_STATE_FLOWC: | |
1434 | case MPCG_STATE_READY: | |
59ae1d12 | 1435 | skb_put_data(new_skb, skb->data, block_len); |
293d984f PT |
1436 | skb_queue_tail(&ch->io_queue, new_skb); |
1437 | tasklet_schedule(&ch->ch_tasklet); | |
1438 | break; | |
1439 | default: | |
59ae1d12 | 1440 | skb_put_data(new_skb, skb->data, len); |
293d984f PT |
1441 | skb_queue_tail(&ch->io_queue, new_skb); |
1442 | tasklet_hi_schedule(&ch->ch_tasklet); | |
1443 | break; | |
1444 | } | |
1445 | } | |
1446 | ||
1447 | again: | |
1448 | switch (fsm_getstate(grp->fsm)) { | |
1449 | int rc, dolock; | |
1450 | case MPCG_STATE_FLOWC: | |
1451 | case MPCG_STATE_READY: | |
1452 | if (ctcm_checkalloc_buffer(ch)) | |
1453 | break; | |
1454 | ch->trans_skb->data = ch->trans_skb_data; | |
1455 | skb_reset_tail_pointer(ch->trans_skb); | |
1456 | ch->trans_skb->len = 0; | |
1457 | ch->ccw[1].count = ch->max_bufsize; | |
1458 | if (do_debug_ccw) | |
1459 | ctcmpc_dumpit((char *)&ch->ccw[0], | |
1460 | sizeof(struct ccw1) * 3); | |
1461 | dolock = !in_irq(); | |
1462 | if (dolock) | |
1463 | spin_lock_irqsave( | |
1464 | get_ccwdev_lock(ch->cdev), saveflags); | |
1465 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
1466 | (unsigned long)ch, 0xff, 0); | |
1467 | if (dolock) /* see remark about conditional locking */ | |
1468 | spin_unlock_irqrestore( | |
1469 | get_ccwdev_lock(ch->cdev), saveflags); | |
1470 | if (rc != 0) | |
1471 | ctcm_ccw_check_rc(ch, rc, "normal RX"); | |
1472 | default: | |
1473 | break; | |
1474 | } | |
1475 | ||
aa3f2cb6 PT |
1476 | CTCM_PR_DEBUG("Exit %s: %s, ch=0x%p, id=%s\n", |
1477 | __func__, dev->name, ch, ch->id); | |
293d984f PT |
1478 | |
1479 | } | |
1480 | ||
1481 | /** | |
1482 | * Initialize connection by sending a __u16 of value 0. | |
1483 | * | |
1484 | * fi An instance of a channel statemachine. | |
1485 | * event The event, just happened. | |
1486 | * arg Generic pointer, casted from channel * upon call. | |
1487 | */ | |
1488 | static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg) | |
1489 | { | |
1490 | struct channel *ch = arg; | |
1491 | struct net_device *dev = ch->netdev; | |
261893d3 | 1492 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 PT |
1493 | struct mpc_group *gptr = priv->mpcg; |
1494 | ||
1495 | CTCM_PR_DEBUG("Enter %s: id=%s, ch=0x%p\n", | |
1496 | __func__, ch->id, ch); | |
1497 | ||
1498 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_INFO, | |
1499 | "%s: %s: chstate:%i, grpstate:%i, prot:%i\n", | |
1500 | CTCM_FUNTAIL, ch->id, fsm_getstate(fi), | |
1501 | fsm_getstate(gptr->fsm), ch->protocol); | |
293d984f | 1502 | |
293d984f PT |
1503 | if (fsm_getstate(fi) == CTC_STATE_TXIDLE) |
1504 | MPC_DBF_DEV_NAME(TRACE, dev, "remote side issued READ? "); | |
1505 | ||
1506 | fsm_deltimer(&ch->timer); | |
1507 | if (ctcm_checkalloc_buffer(ch)) | |
1508 | goto done; | |
1509 | ||
1510 | switch (fsm_getstate(fi)) { | |
1511 | case CTC_STATE_STARTRETRY: | |
1512 | case CTC_STATE_SETUPWAIT: | |
3c09e264 | 1513 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
293d984f PT |
1514 | ctcmpc_chx_rxidle(fi, event, arg); |
1515 | } else { | |
1516 | fsm_newstate(fi, CTC_STATE_TXIDLE); | |
1517 | fsm_event(priv->fsm, DEV_EVENT_TXUP, dev); | |
1518 | } | |
1519 | goto done; | |
1520 | default: | |
1521 | break; | |
6531084c | 1522 | } |
293d984f | 1523 | |
3c09e264 | 1524 | fsm_newstate(fi, (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) |
293d984f PT |
1525 | ? CTC_STATE_RXINIT : CTC_STATE_TXINIT); |
1526 | ||
1527 | done: | |
aa3f2cb6 PT |
1528 | CTCM_PR_DEBUG("Exit %s: id=%s, ch=0x%p\n", |
1529 | __func__, ch->id, ch); | |
293d984f PT |
1530 | return; |
1531 | } | |
1532 | ||
1533 | /** | |
1534 | * Got initial data, check it. If OK, | |
1535 | * notify device statemachine that we are up and | |
1536 | * running. | |
1537 | * | |
1538 | * fi An instance of a channel statemachine. | |
1539 | * event The event, just happened. | |
1540 | * arg Generic pointer, casted from channel * upon call. | |
1541 | */ | |
1542 | void ctcmpc_chx_rxidle(fsm_instance *fi, int event, void *arg) | |
1543 | { | |
1544 | struct channel *ch = arg; | |
1545 | struct net_device *dev = ch->netdev; | |
261893d3 | 1546 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1547 | struct mpc_group *grp = priv->mpcg; |
1548 | int rc; | |
1549 | unsigned long saveflags = 0; /* avoids compiler warning */ | |
1550 | ||
1551 | fsm_deltimer(&ch->timer); | |
aa3f2cb6 PT |
1552 | CTCM_PR_DEBUG("%s: %s: %s: cp:%i, chstate:%i grpstate:%i\n", |
1553 | __func__, ch->id, dev->name, smp_processor_id(), | |
1554 | fsm_getstate(fi), fsm_getstate(grp->fsm)); | |
293d984f PT |
1555 | |
1556 | fsm_newstate(fi, CTC_STATE_RXIDLE); | |
1557 | /* XID processing complete */ | |
1558 | ||
1559 | switch (fsm_getstate(grp->fsm)) { | |
1560 | case MPCG_STATE_FLOWC: | |
1561 | case MPCG_STATE_READY: | |
1562 | if (ctcm_checkalloc_buffer(ch)) | |
1563 | goto done; | |
1564 | ch->trans_skb->data = ch->trans_skb_data; | |
1565 | skb_reset_tail_pointer(ch->trans_skb); | |
1566 | ch->trans_skb->len = 0; | |
1567 | ch->ccw[1].count = ch->max_bufsize; | |
aa3f2cb6 | 1568 | CTCM_CCW_DUMP((char *)&ch->ccw[0], sizeof(struct ccw1) * 3); |
293d984f PT |
1569 | if (event == CTC_EVENT_START) |
1570 | /* see remark about conditional locking */ | |
1571 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); | |
1572 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], | |
1573 | (unsigned long)ch, 0xff, 0); | |
1574 | if (event == CTC_EVENT_START) | |
1575 | spin_unlock_irqrestore( | |
1576 | get_ccwdev_lock(ch->cdev), saveflags); | |
1577 | if (rc != 0) { | |
1578 | fsm_newstate(fi, CTC_STATE_RXINIT); | |
1579 | ctcm_ccw_check_rc(ch, rc, "initial RX"); | |
1580 | goto done; | |
1581 | } | |
1582 | break; | |
1583 | default: | |
1584 | break; | |
1585 | } | |
1586 | ||
1587 | fsm_event(priv->fsm, DEV_EVENT_RXUP, dev); | |
1588 | done: | |
293d984f PT |
1589 | return; |
1590 | } | |
1591 | ||
1592 | /* | |
1593 | * ctcmpc channel FSM action | |
1594 | * called from several points in ctcmpc_ch_fsm | |
1595 | * ctcmpc only | |
1596 | */ | |
1597 | static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg) | |
1598 | { | |
1599 | struct channel *ch = arg; | |
1600 | struct net_device *dev = ch->netdev; | |
261893d3 | 1601 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1602 | struct mpc_group *grp = priv->mpcg; |
1603 | ||
aa3f2cb6 PT |
1604 | CTCM_PR_DEBUG("%s(%s): %s(ch=0x%p), cp=%i, ChStat:%s, GrpStat:%s\n", |
1605 | __func__, dev->name, ch->id, ch, smp_processor_id(), | |
1606 | fsm_getstate_str(ch->fsm), fsm_getstate_str(grp->fsm)); | |
293d984f PT |
1607 | |
1608 | switch (fsm_getstate(grp->fsm)) { | |
1609 | case MPCG_STATE_XID2INITW: | |
1610 | /* ok..start yside xid exchanges */ | |
1611 | if (!ch->in_mpcgroup) | |
1612 | break; | |
1613 | if (fsm_getstate(ch->fsm) == CH_XID0_PENDING) { | |
1614 | fsm_deltimer(&grp->timer); | |
1615 | fsm_addtimer(&grp->timer, | |
1616 | MPC_XID_TIMEOUT_VALUE, | |
1617 | MPCG_EVENT_TIMER, dev); | |
1618 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch); | |
1619 | ||
1620 | } else if (fsm_getstate(ch->fsm) < CH_XID7_PENDING1) | |
1621 | /* attn rcvd before xid0 processed via bh */ | |
1622 | fsm_newstate(ch->fsm, CH_XID7_PENDING1); | |
1623 | break; | |
1624 | case MPCG_STATE_XID2INITX: | |
1625 | case MPCG_STATE_XID0IOWAIT: | |
1626 | case MPCG_STATE_XID0IOWAIX: | |
1627 | /* attn rcvd before xid0 processed on ch | |
1628 | but mid-xid0 processing for group */ | |
1629 | if (fsm_getstate(ch->fsm) < CH_XID7_PENDING1) | |
1630 | fsm_newstate(ch->fsm, CH_XID7_PENDING1); | |
1631 | break; | |
1632 | case MPCG_STATE_XID7INITW: | |
1633 | case MPCG_STATE_XID7INITX: | |
1634 | case MPCG_STATE_XID7INITI: | |
1635 | case MPCG_STATE_XID7INITZ: | |
1636 | switch (fsm_getstate(ch->fsm)) { | |
1637 | case CH_XID7_PENDING: | |
1638 | fsm_newstate(ch->fsm, CH_XID7_PENDING1); | |
1639 | break; | |
1640 | case CH_XID7_PENDING2: | |
1641 | fsm_newstate(ch->fsm, CH_XID7_PENDING3); | |
1642 | break; | |
1643 | } | |
1644 | fsm_event(grp->fsm, MPCG_EVENT_XID7DONE, dev); | |
1645 | break; | |
1646 | } | |
1647 | ||
293d984f | 1648 | return; |
293d984f PT |
1649 | } |
1650 | ||
1651 | /* | |
1652 | * ctcmpc channel FSM action | |
1653 | * called from one point in ctcmpc_ch_fsm | |
1654 | * ctcmpc only | |
1655 | */ | |
1656 | static void ctcmpc_chx_attnbusy(fsm_instance *fsm, int event, void *arg) | |
1657 | { | |
1658 | struct channel *ch = arg; | |
1659 | struct net_device *dev = ch->netdev; | |
261893d3 | 1660 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1661 | struct mpc_group *grp = priv->mpcg; |
1662 | ||
aa3f2cb6 PT |
1663 | CTCM_PR_DEBUG("%s(%s): %s\n ChState:%s GrpState:%s\n", |
1664 | __func__, dev->name, ch->id, | |
1665 | fsm_getstate_str(ch->fsm), fsm_getstate_str(grp->fsm)); | |
293d984f PT |
1666 | |
1667 | fsm_deltimer(&ch->timer); | |
1668 | ||
1669 | switch (fsm_getstate(grp->fsm)) { | |
1670 | case MPCG_STATE_XID0IOWAIT: | |
1671 | /* vtam wants to be primary.start yside xid exchanges*/ | |
1672 | /* only receive one attn-busy at a time so must not */ | |
1673 | /* change state each time */ | |
1674 | grp->changed_side = 1; | |
1675 | fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW); | |
1676 | break; | |
1677 | case MPCG_STATE_XID2INITW: | |
1678 | if (grp->changed_side == 1) { | |
1679 | grp->changed_side = 2; | |
1680 | break; | |
1681 | } | |
1682 | /* process began via call to establish_conn */ | |
1683 | /* so must report failure instead of reverting */ | |
1684 | /* back to ready-for-xid passive state */ | |
1685 | if (grp->estconnfunc) | |
1686 | goto done; | |
1687 | /* this attnbusy is NOT the result of xside xid */ | |
1688 | /* collisions so yside must have been triggered */ | |
1689 | /* by an ATTN that was not intended to start XID */ | |
1690 | /* processing. Revert back to ready-for-xid and */ | |
1691 | /* wait for ATTN interrupt to signal xid start */ | |
1692 | if (fsm_getstate(ch->fsm) == CH_XID0_INPROGRESS) { | |
1693 | fsm_newstate(ch->fsm, CH_XID0_PENDING) ; | |
1694 | fsm_deltimer(&grp->timer); | |
1695 | goto done; | |
1696 | } | |
1697 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1698 | goto done; | |
1699 | case MPCG_STATE_XID2INITX: | |
1700 | /* XID2 was received before ATTN Busy for second | |
1701 | channel.Send yside xid for second channel. | |
1702 | */ | |
1703 | if (grp->changed_side == 1) { | |
1704 | grp->changed_side = 2; | |
1705 | break; | |
1706 | } | |
1707 | case MPCG_STATE_XID0IOWAIX: | |
1708 | case MPCG_STATE_XID7INITW: | |
1709 | case MPCG_STATE_XID7INITX: | |
1710 | case MPCG_STATE_XID7INITI: | |
1711 | case MPCG_STATE_XID7INITZ: | |
1712 | default: | |
1713 | /* multiple attn-busy indicates too out-of-sync */ | |
1714 | /* and they are certainly not being received as part */ | |
1715 | /* of valid mpc group negotiations.. */ | |
1716 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1717 | goto done; | |
1718 | } | |
1719 | ||
1720 | if (grp->changed_side == 1) { | |
1721 | fsm_deltimer(&grp->timer); | |
1722 | fsm_addtimer(&grp->timer, MPC_XID_TIMEOUT_VALUE, | |
1723 | MPCG_EVENT_TIMER, dev); | |
1724 | } | |
1725 | if (ch->in_mpcgroup) | |
1726 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch); | |
1727 | else | |
aa3f2cb6 PT |
1728 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
1729 | "%s(%s): channel %s not added to group", | |
1730 | CTCM_FUNTAIL, dev->name, ch->id); | |
293d984f PT |
1731 | |
1732 | done: | |
293d984f | 1733 | return; |
293d984f PT |
1734 | } |
1735 | ||
1736 | /* | |
1737 | * ctcmpc channel FSM action | |
1738 | * called from several points in ctcmpc_ch_fsm | |
1739 | * ctcmpc only | |
1740 | */ | |
1741 | static void ctcmpc_chx_resend(fsm_instance *fsm, int event, void *arg) | |
1742 | { | |
1743 | struct channel *ch = arg; | |
1744 | struct net_device *dev = ch->netdev; | |
261893d3 | 1745 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
1746 | struct mpc_group *grp = priv->mpcg; |
1747 | ||
293d984f | 1748 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch); |
293d984f PT |
1749 | return; |
1750 | } | |
1751 | ||
1752 | /* | |
1753 | * ctcmpc channel FSM action | |
1754 | * called from several points in ctcmpc_ch_fsm | |
1755 | * ctcmpc only | |
1756 | */ | |
1757 | static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg) | |
1758 | { | |
1759 | struct channel *ach = arg; | |
1760 | struct net_device *dev = ach->netdev; | |
261893d3 | 1761 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f | 1762 | struct mpc_group *grp = priv->mpcg; |
3c09e264 UB |
1763 | struct channel *wch = priv->channel[CTCM_WRITE]; |
1764 | struct channel *rch = priv->channel[CTCM_READ]; | |
293d984f PT |
1765 | struct sk_buff *skb; |
1766 | struct th_sweep *header; | |
1767 | int rc = 0; | |
1768 | unsigned long saveflags = 0; | |
1769 | ||
aa3f2cb6 PT |
1770 | CTCM_PR_DEBUG("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s\n", |
1771 | __func__, smp_processor_id(), ach, ach->id); | |
293d984f PT |
1772 | |
1773 | if (grp->in_sweep == 0) | |
1774 | goto done; | |
1775 | ||
aa3f2cb6 PT |
1776 | CTCM_PR_DBGDATA("%s: 1: ToVTAM_th_seq= %08x\n" , |
1777 | __func__, wch->th_seq_num); | |
1778 | CTCM_PR_DBGDATA("%s: 1: FromVTAM_th_seq= %08x\n" , | |
1779 | __func__, rch->th_seq_num); | |
293d984f PT |
1780 | |
1781 | if (fsm_getstate(wch->fsm) != CTC_STATE_TXIDLE) { | |
1782 | /* give the previous IO time to complete */ | |
1783 | fsm_addtimer(&wch->sweep_timer, | |
1784 | 200, CTC_EVENT_RSWEEP_TIMER, wch); | |
1785 | goto done; | |
1786 | } | |
1787 | ||
1788 | skb = skb_dequeue(&wch->sweep_queue); | |
1789 | if (!skb) | |
1790 | goto done; | |
1791 | ||
1792 | if (set_normalized_cda(&wch->ccw[4], skb->data)) { | |
1793 | grp->in_sweep = 0; | |
1794 | ctcm_clear_busy_do(dev); | |
1795 | dev_kfree_skb_any(skb); | |
1796 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); | |
1797 | goto done; | |
1798 | } else { | |
bba5850c | 1799 | refcount_inc(&skb->users); |
293d984f PT |
1800 | skb_queue_tail(&wch->io_queue, skb); |
1801 | } | |
1802 | ||
1803 | /* send out the sweep */ | |
1804 | wch->ccw[4].count = skb->len; | |
1805 | ||
1806 | header = (struct th_sweep *)skb->data; | |
1807 | switch (header->th.th_ch_flag) { | |
1808 | case TH_SWEEP_REQ: | |
1809 | grp->sweep_req_pend_num--; | |
1810 | break; | |
1811 | case TH_SWEEP_RESP: | |
1812 | grp->sweep_rsp_pend_num--; | |
1813 | break; | |
1814 | } | |
1815 | ||
1816 | header->sw.th_last_seq = wch->th_seq_num; | |
1817 | ||
aa3f2cb6 PT |
1818 | CTCM_CCW_DUMP((char *)&wch->ccw[3], sizeof(struct ccw1) * 3); |
1819 | CTCM_PR_DBGDATA("%s: sweep packet\n", __func__); | |
1820 | CTCM_D3_DUMP((char *)header, TH_SWEEP_LENGTH); | |
293d984f PT |
1821 | |
1822 | fsm_addtimer(&wch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, wch); | |
1823 | fsm_newstate(wch->fsm, CTC_STATE_TX); | |
1824 | ||
1825 | spin_lock_irqsave(get_ccwdev_lock(wch->cdev), saveflags); | |
ee6edb97 | 1826 | wch->prof.send_stamp = jiffies; |
293d984f PT |
1827 | rc = ccw_device_start(wch->cdev, &wch->ccw[3], |
1828 | (unsigned long) wch, 0xff, 0); | |
1829 | spin_unlock_irqrestore(get_ccwdev_lock(wch->cdev), saveflags); | |
1830 | ||
1831 | if ((grp->sweep_req_pend_num == 0) && | |
1832 | (grp->sweep_rsp_pend_num == 0)) { | |
1833 | grp->in_sweep = 0; | |
1834 | rch->th_seq_num = 0x00; | |
1835 | wch->th_seq_num = 0x00; | |
1836 | ctcm_clear_busy_do(dev); | |
1837 | } | |
1838 | ||
aa3f2cb6 PT |
1839 | CTCM_PR_DBGDATA("%s: To-/From-VTAM_th_seq = %08x/%08x\n" , |
1840 | __func__, wch->th_seq_num, rch->th_seq_num); | |
293d984f PT |
1841 | |
1842 | if (rc != 0) | |
1843 | ctcm_ccw_check_rc(wch, rc, "send sweep"); | |
1844 | ||
1845 | done: | |
293d984f PT |
1846 | return; |
1847 | } | |
1848 | ||
1849 | ||
1850 | /* | |
1851 | * The ctcmpc statemachine for a channel. | |
1852 | */ | |
1853 | ||
1854 | const fsm_node ctcmpc_ch_fsm[] = { | |
1855 | { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop }, | |
1856 | { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start }, | |
1857 | { CTC_STATE_STOPPED, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1858 | { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1859 | { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop }, | |
1860 | ||
1861 | { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop }, | |
1862 | { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop }, | |
1863 | { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1864 | { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop }, | |
1865 | { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start }, | |
1866 | { CTC_STATE_NOTOP, CTC_EVENT_UC_RCRESET, ctcm_chx_stop }, | |
1867 | { CTC_STATE_NOTOP, CTC_EVENT_UC_RSRESET, ctcm_chx_stop }, | |
1868 | { CTC_STATE_NOTOP, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1869 | ||
1870 | { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1871 | { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop }, | |
1872 | { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, | |
1873 | { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr }, | |
1874 | { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1875 | { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1876 | ||
1877 | { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1878 | { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode }, | |
1879 | { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, | |
1880 | { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1881 | { CTC_STATE_STARTRETRY, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1882 | ||
1883 | { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1884 | { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop }, | |
1885 | { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio }, | |
1886 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1887 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1888 | { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode }, | |
1889 | { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1890 | { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1891 | ||
1892 | { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1893 | { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop }, | |
1894 | { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, ctcmpc_chx_rxidle }, | |
1895 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr }, | |
1896 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr }, | |
1897 | { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr }, | |
1898 | { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail }, | |
1899 | { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1900 | { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, ctcmpc_chx_firstio }, | |
1901 | { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1902 | ||
1903 | { CH_XID0_PENDING, CTC_EVENT_FINSTAT, ctcm_action_nop }, | |
1904 | { CH_XID0_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1905 | { CH_XID0_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1906 | { CH_XID0_PENDING, CTC_EVENT_START, ctcm_action_nop }, | |
1907 | { CH_XID0_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1908 | { CH_XID0_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1909 | { CH_XID0_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1910 | { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1911 | { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1912 | { CH_XID0_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1913 | ||
1914 | { CH_XID0_INPROGRESS, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1915 | { CH_XID0_INPROGRESS, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1916 | { CH_XID0_INPROGRESS, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1917 | { CH_XID0_INPROGRESS, CTC_EVENT_START, ctcm_action_nop }, | |
1918 | { CH_XID0_INPROGRESS, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1919 | { CH_XID0_INPROGRESS, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1920 | { CH_XID0_INPROGRESS, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1921 | { CH_XID0_INPROGRESS, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1922 | { CH_XID0_INPROGRESS, CTC_EVENT_ATTNBUSY, ctcmpc_chx_attnbusy }, | |
1923 | { CH_XID0_INPROGRESS, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1924 | { CH_XID0_INPROGRESS, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1925 | ||
1926 | { CH_XID7_PENDING, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1927 | { CH_XID7_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1928 | { CH_XID7_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1929 | { CH_XID7_PENDING, CTC_EVENT_START, ctcm_action_nop }, | |
1930 | { CH_XID7_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1931 | { CH_XID7_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1932 | { CH_XID7_PENDING, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1933 | { CH_XID7_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1934 | { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1935 | { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1936 | { CH_XID7_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1937 | { CH_XID7_PENDING, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1938 | { CH_XID7_PENDING, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1939 | ||
1940 | { CH_XID7_PENDING1, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1941 | { CH_XID7_PENDING1, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1942 | { CH_XID7_PENDING1, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1943 | { CH_XID7_PENDING1, CTC_EVENT_START, ctcm_action_nop }, | |
1944 | { CH_XID7_PENDING1, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1945 | { CH_XID7_PENDING1, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1946 | { CH_XID7_PENDING1, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1947 | { CH_XID7_PENDING1, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1948 | { CH_XID7_PENDING1, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1949 | { CH_XID7_PENDING1, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1950 | { CH_XID7_PENDING1, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1951 | { CH_XID7_PENDING1, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1952 | ||
1953 | { CH_XID7_PENDING2, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1954 | { CH_XID7_PENDING2, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1955 | { CH_XID7_PENDING2, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1956 | { CH_XID7_PENDING2, CTC_EVENT_START, ctcm_action_nop }, | |
1957 | { CH_XID7_PENDING2, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1958 | { CH_XID7_PENDING2, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1959 | { CH_XID7_PENDING2, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1960 | { CH_XID7_PENDING2, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1961 | { CH_XID7_PENDING2, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1962 | { CH_XID7_PENDING2, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1963 | { CH_XID7_PENDING2, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1964 | { CH_XID7_PENDING2, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1965 | ||
1966 | { CH_XID7_PENDING3, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1967 | { CH_XID7_PENDING3, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1968 | { CH_XID7_PENDING3, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1969 | { CH_XID7_PENDING3, CTC_EVENT_START, ctcm_action_nop }, | |
1970 | { CH_XID7_PENDING3, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1971 | { CH_XID7_PENDING3, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1972 | { CH_XID7_PENDING3, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1973 | { CH_XID7_PENDING3, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1974 | { CH_XID7_PENDING3, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1975 | { CH_XID7_PENDING3, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1976 | { CH_XID7_PENDING3, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1977 | { CH_XID7_PENDING3, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1978 | ||
1979 | { CH_XID7_PENDING4, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1980 | { CH_XID7_PENDING4, CTC_EVENT_ATTN, ctcmpc_chx_attn }, | |
1981 | { CH_XID7_PENDING4, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1982 | { CH_XID7_PENDING4, CTC_EVENT_START, ctcm_action_nop }, | |
1983 | { CH_XID7_PENDING4, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1984 | { CH_XID7_PENDING4, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1985 | { CH_XID7_PENDING4, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
1986 | { CH_XID7_PENDING4, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, | |
1987 | { CH_XID7_PENDING4, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, | |
1988 | { CH_XID7_PENDING4, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, | |
1989 | { CH_XID7_PENDING4, CTC_EVENT_TIMER, ctcmpc_chx_resend }, | |
1990 | { CH_XID7_PENDING4, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
1991 | ||
1992 | { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
1993 | { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop }, | |
1994 | { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, | |
1995 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc }, | |
1996 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail }, | |
1997 | { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
1998 | { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
1999 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, | |
2000 | ||
2001 | { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2002 | { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop }, | |
2003 | { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle }, | |
2004 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr }, | |
2005 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr }, | |
2006 | { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr }, | |
2007 | { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2008 | { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2009 | { CTC_STATE_TXINIT, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep }, | |
2010 | ||
2011 | { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2012 | { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop }, | |
2013 | { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio }, | |
2014 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_fail }, | |
2015 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail }, | |
2016 | { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2017 | { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2018 | { CTC_STATE_TXIDLE, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep }, | |
2019 | ||
2020 | { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop }, | |
2021 | { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart }, | |
2022 | { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped }, | |
2023 | { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, | |
2024 | { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, | |
2025 | { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2026 | { CTC_STATE_TERM, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
2027 | { CTC_STATE_TERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2028 | ||
2029 | { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2030 | { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart }, | |
2031 | { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, | |
2032 | { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, | |
2033 | { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, | |
2034 | { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2035 | { CTC_STATE_DTERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2036 | ||
2037 | { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2038 | { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop }, | |
2039 | { CTC_STATE_TX, CTC_EVENT_FINSTAT, ctcmpc_chx_txdone }, | |
2040 | { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_fail }, | |
2041 | { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_fail }, | |
2042 | { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry }, | |
2043 | { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2044 | { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2045 | { CTC_STATE_TX, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep }, | |
2046 | { CTC_STATE_TX, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, | |
2047 | ||
2048 | { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2049 | { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, | |
2050 | { CTC_STATE_TXERR, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, | |
2051 | { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2052 | { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, | |
2053 | }; | |
2054 | ||
2055 | int mpc_ch_fsm_len = ARRAY_SIZE(ctcmpc_ch_fsm); | |
2056 | ||
2057 | /* | |
2058 | * Actions for interface - statemachine. | |
2059 | */ | |
2060 | ||
2061 | /** | |
2062 | * Startup channels by sending CTC_EVENT_START to each channel. | |
2063 | * | |
2064 | * fi An instance of an interface statemachine. | |
2065 | * event The event, just happened. | |
2066 | * arg Generic pointer, casted from struct net_device * upon call. | |
2067 | */ | |
2068 | static void dev_action_start(fsm_instance *fi, int event, void *arg) | |
2069 | { | |
2070 | struct net_device *dev = arg; | |
261893d3 | 2071 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
2072 | int direction; |
2073 | ||
2074 | CTCMY_DBF_DEV_NAME(SETUP, dev, ""); | |
2075 | ||
2076 | fsm_deltimer(&priv->restart_timer); | |
2077 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX); | |
2078 | if (IS_MPC(priv)) | |
2079 | priv->mpcg->channels_terminating = 0; | |
3c09e264 | 2080 | for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) { |
293d984f PT |
2081 | struct channel *ch = priv->channel[direction]; |
2082 | fsm_event(ch->fsm, CTC_EVENT_START, ch); | |
2083 | } | |
2084 | } | |
2085 | ||
2086 | /** | |
2087 | * Shutdown channels by sending CTC_EVENT_STOP to each channel. | |
2088 | * | |
2089 | * fi An instance of an interface statemachine. | |
2090 | * event The event, just happened. | |
2091 | * arg Generic pointer, casted from struct net_device * upon call. | |
2092 | */ | |
2093 | static void dev_action_stop(fsm_instance *fi, int event, void *arg) | |
2094 | { | |
2095 | int direction; | |
2096 | struct net_device *dev = arg; | |
261893d3 | 2097 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
2098 | |
2099 | CTCMY_DBF_DEV_NAME(SETUP, dev, ""); | |
2100 | ||
2101 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX); | |
3c09e264 | 2102 | for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) { |
293d984f PT |
2103 | struct channel *ch = priv->channel[direction]; |
2104 | fsm_event(ch->fsm, CTC_EVENT_STOP, ch); | |
2105 | ch->th_seq_num = 0x00; | |
aa3f2cb6 PT |
2106 | CTCM_PR_DEBUG("%s: CH_th_seq= %08x\n", |
2107 | __func__, ch->th_seq_num); | |
293d984f PT |
2108 | } |
2109 | if (IS_MPC(priv)) | |
2110 | fsm_newstate(priv->mpcg->fsm, MPCG_STATE_RESET); | |
2111 | } | |
2112 | ||
2113 | static void dev_action_restart(fsm_instance *fi, int event, void *arg) | |
2114 | { | |
2115 | int restart_timer; | |
2116 | struct net_device *dev = arg; | |
261893d3 | 2117 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
2118 | |
2119 | CTCMY_DBF_DEV_NAME(TRACE, dev, ""); | |
2120 | ||
2121 | if (IS_MPC(priv)) { | |
293d984f PT |
2122 | restart_timer = CTCM_TIME_1_SEC; |
2123 | } else { | |
293d984f PT |
2124 | restart_timer = CTCM_TIME_5_SEC; |
2125 | } | |
2a7c6f2c | 2126 | dev_info(&dev->dev, "Restarting device\n"); |
293d984f PT |
2127 | |
2128 | dev_action_stop(fi, event, arg); | |
2129 | fsm_event(priv->fsm, DEV_EVENT_STOP, dev); | |
2130 | if (IS_MPC(priv)) | |
2131 | fsm_newstate(priv->mpcg->fsm, MPCG_STATE_RESET); | |
2132 | ||
2133 | /* going back into start sequence too quickly can */ | |
2134 | /* result in the other side becoming unreachable due */ | |
2135 | /* to sense reported when IO is aborted */ | |
2136 | fsm_addtimer(&priv->restart_timer, restart_timer, | |
2137 | DEV_EVENT_START, dev); | |
2138 | } | |
2139 | ||
2140 | /** | |
2141 | * Called from channel statemachine | |
2142 | * when a channel is up and running. | |
2143 | * | |
2144 | * fi An instance of an interface statemachine. | |
2145 | * event The event, just happened. | |
2146 | * arg Generic pointer, casted from struct net_device * upon call. | |
2147 | */ | |
2148 | static void dev_action_chup(fsm_instance *fi, int event, void *arg) | |
2149 | { | |
2150 | struct net_device *dev = arg; | |
261893d3 | 2151 | struct ctcm_priv *priv = dev->ml_priv; |
aa3f2cb6 | 2152 | int dev_stat = fsm_getstate(fi); |
293d984f | 2153 | |
aa3f2cb6 PT |
2154 | CTCM_DBF_TEXT_(SETUP, CTC_DBF_NOTICE, |
2155 | "%s(%s): priv = %p [%d,%d]\n ", CTCM_FUNTAIL, | |
261893d3 | 2156 | dev->name, dev->ml_priv, dev_stat, event); |
293d984f PT |
2157 | |
2158 | switch (fsm_getstate(fi)) { | |
2159 | case DEV_STATE_STARTWAIT_RXTX: | |
2160 | if (event == DEV_EVENT_RXUP) | |
2161 | fsm_newstate(fi, DEV_STATE_STARTWAIT_TX); | |
2162 | else | |
2163 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RX); | |
2164 | break; | |
2165 | case DEV_STATE_STARTWAIT_RX: | |
2166 | if (event == DEV_EVENT_RXUP) { | |
2167 | fsm_newstate(fi, DEV_STATE_RUNNING); | |
2a7c6f2c PT |
2168 | dev_info(&dev->dev, |
2169 | "Connected with remote side\n"); | |
293d984f PT |
2170 | ctcm_clear_busy(dev); |
2171 | } | |
2172 | break; | |
2173 | case DEV_STATE_STARTWAIT_TX: | |
2174 | if (event == DEV_EVENT_TXUP) { | |
2175 | fsm_newstate(fi, DEV_STATE_RUNNING); | |
2a7c6f2c PT |
2176 | dev_info(&dev->dev, |
2177 | "Connected with remote side\n"); | |
293d984f PT |
2178 | ctcm_clear_busy(dev); |
2179 | } | |
2180 | break; | |
2181 | case DEV_STATE_STOPWAIT_TX: | |
2182 | if (event == DEV_EVENT_RXUP) | |
2183 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX); | |
2184 | break; | |
2185 | case DEV_STATE_STOPWAIT_RX: | |
2186 | if (event == DEV_EVENT_TXUP) | |
2187 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX); | |
2188 | break; | |
2189 | } | |
2190 | ||
2191 | if (IS_MPC(priv)) { | |
2192 | if (event == DEV_EVENT_RXUP) | |
3c09e264 UB |
2193 | mpc_channel_action(priv->channel[CTCM_READ], |
2194 | CTCM_READ, MPC_CHANNEL_ADD); | |
293d984f | 2195 | else |
3c09e264 UB |
2196 | mpc_channel_action(priv->channel[CTCM_WRITE], |
2197 | CTCM_WRITE, MPC_CHANNEL_ADD); | |
293d984f PT |
2198 | } |
2199 | } | |
2200 | ||
2201 | /** | |
2202 | * Called from device statemachine | |
2203 | * when a channel has been shutdown. | |
2204 | * | |
2205 | * fi An instance of an interface statemachine. | |
2206 | * event The event, just happened. | |
2207 | * arg Generic pointer, casted from struct net_device * upon call. | |
2208 | */ | |
2209 | static void dev_action_chdown(fsm_instance *fi, int event, void *arg) | |
2210 | { | |
2211 | ||
2212 | struct net_device *dev = arg; | |
261893d3 | 2213 | struct ctcm_priv *priv = dev->ml_priv; |
293d984f PT |
2214 | |
2215 | CTCMY_DBF_DEV_NAME(SETUP, dev, ""); | |
2216 | ||
2217 | switch (fsm_getstate(fi)) { | |
2218 | case DEV_STATE_RUNNING: | |
2219 | if (event == DEV_EVENT_TXDOWN) | |
2220 | fsm_newstate(fi, DEV_STATE_STARTWAIT_TX); | |
2221 | else | |
2222 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RX); | |
2223 | break; | |
2224 | case DEV_STATE_STARTWAIT_RX: | |
2225 | if (event == DEV_EVENT_TXDOWN) | |
2226 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX); | |
2227 | break; | |
2228 | case DEV_STATE_STARTWAIT_TX: | |
2229 | if (event == DEV_EVENT_RXDOWN) | |
2230 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX); | |
2231 | break; | |
2232 | case DEV_STATE_STOPWAIT_RXTX: | |
2233 | if (event == DEV_EVENT_TXDOWN) | |
2234 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RX); | |
2235 | else | |
2236 | fsm_newstate(fi, DEV_STATE_STOPWAIT_TX); | |
2237 | break; | |
2238 | case DEV_STATE_STOPWAIT_RX: | |
2239 | if (event == DEV_EVENT_RXDOWN) | |
2240 | fsm_newstate(fi, DEV_STATE_STOPPED); | |
2241 | break; | |
2242 | case DEV_STATE_STOPWAIT_TX: | |
2243 | if (event == DEV_EVENT_TXDOWN) | |
2244 | fsm_newstate(fi, DEV_STATE_STOPPED); | |
2245 | break; | |
2246 | } | |
2247 | if (IS_MPC(priv)) { | |
2248 | if (event == DEV_EVENT_RXDOWN) | |
3c09e264 UB |
2249 | mpc_channel_action(priv->channel[CTCM_READ], |
2250 | CTCM_READ, MPC_CHANNEL_REMOVE); | |
293d984f | 2251 | else |
3c09e264 UB |
2252 | mpc_channel_action(priv->channel[CTCM_WRITE], |
2253 | CTCM_WRITE, MPC_CHANNEL_REMOVE); | |
293d984f PT |
2254 | } |
2255 | } | |
2256 | ||
2257 | const fsm_node dev_fsm[] = { | |
2258 | { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start }, | |
2259 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_START, dev_action_start }, | |
2260 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2261 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2262 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart }, | |
2263 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_START, dev_action_start }, | |
2264 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXUP, dev_action_chup }, | |
2265 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_TXUP, dev_action_chup }, | |
2266 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2267 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RESTART, dev_action_restart }, | |
2268 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_START, dev_action_start }, | |
2269 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RXUP, dev_action_chup }, | |
2270 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXUP, dev_action_chup }, | |
2271 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2272 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RESTART, dev_action_restart }, | |
2273 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_STOP, dev_action_stop }, | |
2274 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXUP, dev_action_chup }, | |
2275 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXUP, dev_action_chup }, | |
2276 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2277 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2278 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart }, | |
2279 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_STOP, dev_action_stop }, | |
2280 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXUP, dev_action_chup }, | |
2281 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_TXUP, dev_action_chup }, | |
2282 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2283 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RESTART, dev_action_restart }, | |
2284 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_STOP, dev_action_stop }, | |
2285 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RXUP, dev_action_chup }, | |
2286 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXUP, dev_action_chup }, | |
2287 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2288 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RESTART, dev_action_restart }, | |
2289 | { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop }, | |
2290 | { DEV_STATE_RUNNING, DEV_EVENT_RXDOWN, dev_action_chdown }, | |
2291 | { DEV_STATE_RUNNING, DEV_EVENT_TXDOWN, dev_action_chdown }, | |
2292 | { DEV_STATE_RUNNING, DEV_EVENT_TXUP, ctcm_action_nop }, | |
2293 | { DEV_STATE_RUNNING, DEV_EVENT_RXUP, ctcm_action_nop }, | |
2294 | { DEV_STATE_RUNNING, DEV_EVENT_RESTART, dev_action_restart }, | |
2295 | }; | |
2296 | ||
2297 | int dev_fsm_len = ARRAY_SIZE(dev_fsm); | |
2298 | ||
2299 | /* --- This is the END my friend --- */ | |
2300 |