Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * drivers/s390/cio/device_fsm.c | |
3 | * finite state machine for device handling | |
4 | * | |
c820de39 | 5 | * Copyright IBM Corp. 2002,2008 |
4ce3b30c | 6 | * Author(s): Cornelia Huck (cornelia.huck@de.ibm.com) |
1da177e4 LT |
7 | * Martin Schwidefsky (schwidefsky@de.ibm.com) |
8 | */ | |
9 | ||
10 | #include <linux/module.h> | |
1da177e4 | 11 | #include <linux/init.h> |
4e57b681 TS |
12 | #include <linux/jiffies.h> |
13 | #include <linux/string.h> | |
1da177e4 LT |
14 | |
15 | #include <asm/ccwdev.h> | |
4c24da79 | 16 | #include <asm/cio.h> |
e5854a58 | 17 | #include <asm/chpid.h> |
1da177e4 LT |
18 | |
19 | #include "cio.h" | |
20 | #include "cio_debug.h" | |
21 | #include "css.h" | |
22 | #include "device.h" | |
23 | #include "chsc.h" | |
24 | #include "ioasm.h" | |
e6b6e10a | 25 | #include "chp.h" |
1da177e4 | 26 | |
14ff56bb SO |
27 | static int timeout_log_enabled; |
28 | ||
14ff56bb SO |
29 | static int __init ccw_timeout_log_setup(char *unused) |
30 | { | |
31 | timeout_log_enabled = 1; | |
32 | return 1; | |
33 | } | |
34 | ||
35 | __setup("ccw_timeout_log", ccw_timeout_log_setup); | |
36 | ||
37 | static void ccw_timeout_log(struct ccw_device *cdev) | |
38 | { | |
39 | struct schib schib; | |
40 | struct subchannel *sch; | |
cd6b4f27 | 41 | struct io_subchannel_private *private; |
83262d63 | 42 | union orb *orb; |
14ff56bb SO |
43 | int cc; |
44 | ||
45 | sch = to_subchannel(cdev->dev.parent); | |
cd6b4f27 | 46 | private = to_io_private(sch); |
83262d63 | 47 | orb = &private->orb; |
8821d24c | 48 | cc = stsch_err(sch->schid, &schib); |
14ff56bb SO |
49 | |
50 | printk(KERN_WARNING "cio: ccw device timeout occurred at %llx, " | |
51 | "device information:\n", get_clock()); | |
52 | printk(KERN_WARNING "cio: orb:\n"); | |
53 | print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, | |
83262d63 | 54 | orb, sizeof(*orb), 0); |
2a0217d5 KS |
55 | printk(KERN_WARNING "cio: ccw device bus id: %s\n", |
56 | dev_name(&cdev->dev)); | |
57 | printk(KERN_WARNING "cio: subchannel bus id: %s\n", | |
58 | dev_name(&sch->dev)); | |
14ff56bb SO |
59 | printk(KERN_WARNING "cio: subchannel lpm: %02x, opm: %02x, " |
60 | "vpm: %02x\n", sch->lpm, sch->opm, sch->vpm); | |
61 | ||
83262d63 PO |
62 | if (orb->tm.b) { |
63 | printk(KERN_WARNING "cio: orb indicates transport mode\n"); | |
64 | printk(KERN_WARNING "cio: last tcw:\n"); | |
65 | print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, | |
66 | (void *)(addr_t)orb->tm.tcw, | |
67 | sizeof(struct tcw), 0); | |
68 | } else { | |
69 | printk(KERN_WARNING "cio: orb indicates command mode\n"); | |
70 | if ((void *)(addr_t)orb->cmd.cpa == &private->sense_ccw || | |
71 | (void *)(addr_t)orb->cmd.cpa == cdev->private->iccws) | |
72 | printk(KERN_WARNING "cio: last channel program " | |
73 | "(intern):\n"); | |
74 | else | |
75 | printk(KERN_WARNING "cio: last channel program:\n"); | |
76 | ||
77 | print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, | |
78 | (void *)(addr_t)orb->cmd.cpa, | |
79 | sizeof(struct ccw1), 0); | |
80 | } | |
14ff56bb SO |
81 | printk(KERN_WARNING "cio: ccw device state: %d\n", |
82 | cdev->private->state); | |
83 | printk(KERN_WARNING "cio: store subchannel returned: cc=%d\n", cc); | |
84 | printk(KERN_WARNING "cio: schib:\n"); | |
85 | print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, | |
86 | &schib, sizeof(schib), 0); | |
87 | printk(KERN_WARNING "cio: ccw device flags:\n"); | |
88 | print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, | |
89 | &cdev->private->flags, sizeof(cdev->private->flags), 0); | |
90 | } | |
91 | ||
1da177e4 LT |
92 | /* |
93 | * Timeout function. It just triggers a DEV_EVENT_TIMEOUT. | |
94 | */ | |
95 | static void | |
96 | ccw_device_timeout(unsigned long data) | |
97 | { | |
98 | struct ccw_device *cdev; | |
99 | ||
100 | cdev = (struct ccw_device *) data; | |
101 | spin_lock_irq(cdev->ccwlock); | |
14ff56bb SO |
102 | if (timeout_log_enabled) |
103 | ccw_timeout_log(cdev); | |
1da177e4 LT |
104 | dev_fsm_event(cdev, DEV_EVENT_TIMEOUT); |
105 | spin_unlock_irq(cdev->ccwlock); | |
106 | } | |
107 | ||
108 | /* | |
109 | * Set timeout | |
110 | */ | |
111 | void | |
112 | ccw_device_set_timeout(struct ccw_device *cdev, int expires) | |
113 | { | |
114 | if (expires == 0) { | |
115 | del_timer(&cdev->private->timer); | |
116 | return; | |
117 | } | |
118 | if (timer_pending(&cdev->private->timer)) { | |
119 | if (mod_timer(&cdev->private->timer, jiffies + expires)) | |
120 | return; | |
121 | } | |
122 | cdev->private->timer.function = ccw_device_timeout; | |
123 | cdev->private->timer.data = (unsigned long) cdev; | |
124 | cdev->private->timer.expires = jiffies + expires; | |
125 | add_timer(&cdev->private->timer); | |
126 | } | |
127 | ||
1da177e4 LT |
128 | /* |
129 | * Cancel running i/o. This is called repeatedly since halt/clear are | |
130 | * asynchronous operations. We do one try with cio_cancel, two tries | |
131 | * with cio_halt, 255 tries with cio_clear. If everythings fails panic. | |
132 | * Returns 0 if device now idle, -ENODEV for device not operational and | |
133 | * -EBUSY if an interrupt is expected (either from halt/clear or from a | |
134 | * status pending). | |
135 | */ | |
136 | int | |
137 | ccw_device_cancel_halt_clear(struct ccw_device *cdev) | |
138 | { | |
139 | struct subchannel *sch; | |
140 | int ret; | |
141 | ||
142 | sch = to_subchannel(cdev->dev.parent); | |
cdb912a4 | 143 | if (cio_update_schib(sch)) |
1da177e4 | 144 | return -ENODEV; |
2470b648 CH |
145 | if (!sch->schib.pmcw.ena) |
146 | /* Not operational -> done. */ | |
1da177e4 LT |
147 | return 0; |
148 | /* Stage 1: cancel io. */ | |
23d805b6 PO |
149 | if (!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_HALT_PEND) && |
150 | !(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_CLEAR_PEND)) { | |
83262d63 PO |
151 | if (!scsw_is_tm(&sch->schib.scsw)) { |
152 | ret = cio_cancel(sch); | |
153 | if (ret != -EINVAL) | |
154 | return ret; | |
155 | } | |
156 | /* cancel io unsuccessful or not applicable (transport mode). | |
157 | * Continue with asynchronous instructions. */ | |
1da177e4 LT |
158 | cdev->private->iretry = 3; /* 3 halt retries. */ |
159 | } | |
23d805b6 | 160 | if (!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_CLEAR_PEND)) { |
1da177e4 LT |
161 | /* Stage 2: halt io. */ |
162 | if (cdev->private->iretry) { | |
163 | cdev->private->iretry--; | |
164 | ret = cio_halt(sch); | |
ba4ba8a6 PO |
165 | if (ret != -EBUSY) |
166 | return (ret == 0) ? -EBUSY : ret; | |
1da177e4 LT |
167 | } |
168 | /* halt io unsuccessful. */ | |
169 | cdev->private->iretry = 255; /* 255 clear retries. */ | |
170 | } | |
171 | /* Stage 3: clear io. */ | |
172 | if (cdev->private->iretry) { | |
173 | cdev->private->iretry--; | |
174 | ret = cio_clear (sch); | |
175 | return (ret == 0) ? -EBUSY : ret; | |
176 | } | |
177 | panic("Can't stop i/o on subchannel.\n"); | |
178 | } | |
179 | ||
823d494a | 180 | void ccw_device_update_sense_data(struct ccw_device *cdev) |
1da177e4 | 181 | { |
823d494a SO |
182 | memset(&cdev->id, 0, sizeof(cdev->id)); |
183 | cdev->id.cu_type = cdev->private->senseid.cu_type; | |
184 | cdev->id.cu_model = cdev->private->senseid.cu_model; | |
185 | cdev->id.dev_type = cdev->private->senseid.dev_type; | |
186 | cdev->id.dev_model = cdev->private->senseid.dev_model; | |
187 | } | |
1da177e4 | 188 | |
823d494a SO |
189 | int ccw_device_test_sense_data(struct ccw_device *cdev) |
190 | { | |
191 | return cdev->id.cu_type == cdev->private->senseid.cu_type && | |
192 | cdev->id.cu_model == cdev->private->senseid.cu_model && | |
193 | cdev->id.dev_type == cdev->private->senseid.dev_type && | |
194 | cdev->id.dev_model == cdev->private->senseid.dev_model; | |
1da177e4 LT |
195 | } |
196 | ||
197 | /* | |
198 | * The machine won't give us any notification by machine check if a chpid has | |
199 | * been varied online on the SE so we have to find out by magic (i. e. driving | |
200 | * the channel subsystem to device selection and updating our path masks). | |
201 | */ | |
4d284cac | 202 | static void |
1da177e4 LT |
203 | __recover_lost_chpids(struct subchannel *sch, int old_lpm) |
204 | { | |
205 | int mask, i; | |
f86635fa | 206 | struct chp_id chpid; |
1da177e4 | 207 | |
f86635fa | 208 | chp_id_init(&chpid); |
1da177e4 LT |
209 | for (i = 0; i<8; i++) { |
210 | mask = 0x80 >> i; | |
211 | if (!(sch->lpm & mask)) | |
212 | continue; | |
213 | if (old_lpm & mask) | |
214 | continue; | |
f86635fa | 215 | chpid.id = sch->schib.pmcw.chpid[i]; |
83b3370c PO |
216 | if (!chp_is_registered(chpid)) |
217 | css_schedule_eval_all(); | |
1da177e4 LT |
218 | } |
219 | } | |
220 | ||
221 | /* | |
222 | * Stop device recognition. | |
223 | */ | |
224 | static void | |
225 | ccw_device_recog_done(struct ccw_device *cdev, int state) | |
226 | { | |
227 | struct subchannel *sch; | |
823d494a | 228 | int old_lpm; |
1da177e4 LT |
229 | |
230 | sch = to_subchannel(cdev->dev.parent); | |
231 | ||
ec64333c SO |
232 | if (cio_disable_subchannel(sch)) |
233 | state = DEV_STATE_NOT_OPER; | |
1da177e4 LT |
234 | /* |
235 | * Now that we tried recognition, we have performed device selection | |
236 | * through ssch() and the path information is up to date. | |
237 | */ | |
238 | old_lpm = sch->lpm; | |
cdb912a4 | 239 | |
4ffa9234 | 240 | /* Check since device may again have become not operational. */ |
cdb912a4 | 241 | if (cio_update_schib(sch)) |
4ffa9234 | 242 | state = DEV_STATE_NOT_OPER; |
cdb912a4 SO |
243 | else |
244 | sch->lpm = sch->schib.pmcw.pam & sch->opm; | |
245 | ||
1da177e4 LT |
246 | if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) |
247 | /* Force reprobe on all chpids. */ | |
248 | old_lpm = 0; | |
249 | if (sch->lpm != old_lpm) | |
250 | __recover_lost_chpids(sch, old_lpm); | |
47593bfa SO |
251 | if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID && |
252 | (state == DEV_STATE_NOT_OPER || state == DEV_STATE_BOXED)) { | |
253 | cdev->private->flags.recog_done = 1; | |
254 | cdev->private->state = DEV_STATE_DISCONNECTED; | |
255 | wake_up(&cdev->private->wait_q); | |
256 | return; | |
1da177e4 | 257 | } |
823d494a SO |
258 | if (cdev->private->flags.resuming) { |
259 | cdev->private->state = state; | |
260 | cdev->private->flags.recog_done = 1; | |
261 | wake_up(&cdev->private->wait_q); | |
262 | return; | |
263 | } | |
1da177e4 LT |
264 | switch (state) { |
265 | case DEV_STATE_NOT_OPER: | |
1da177e4 LT |
266 | break; |
267 | case DEV_STATE_OFFLINE: | |
823d494a SO |
268 | if (!cdev->online) { |
269 | ccw_device_update_sense_data(cdev); | |
823d494a | 270 | break; |
1da177e4 | 271 | } |
823d494a SO |
272 | cdev->private->state = DEV_STATE_OFFLINE; |
273 | cdev->private->flags.recog_done = 1; | |
274 | if (ccw_device_test_sense_data(cdev)) { | |
275 | cdev->private->flags.donotify = 1; | |
276 | ccw_device_online(cdev); | |
277 | wake_up(&cdev->private->wait_q); | |
278 | } else { | |
279 | ccw_device_update_sense_data(cdev); | |
37de53bb | 280 | ccw_device_sched_todo(cdev, CDEV_TODO_REBIND); |
1da177e4 | 281 | } |
823d494a | 282 | return; |
1da177e4 | 283 | case DEV_STATE_BOXED: |
47593bfa SO |
284 | if (cdev->id.cu_type != 0) { /* device was recognized before */ |
285 | cdev->private->flags.recog_done = 1; | |
286 | cdev->private->state = DEV_STATE_BOXED; | |
287 | wake_up(&cdev->private->wait_q); | |
288 | return; | |
289 | } | |
1da177e4 LT |
290 | break; |
291 | } | |
292 | cdev->private->state = state; | |
293 | io_subchannel_recog_done(cdev); | |
156013ff | 294 | wake_up(&cdev->private->wait_q); |
1da177e4 LT |
295 | } |
296 | ||
297 | /* | |
298 | * Function called from device_id.c after sense id has completed. | |
299 | */ | |
300 | void | |
301 | ccw_device_sense_id_done(struct ccw_device *cdev, int err) | |
302 | { | |
303 | switch (err) { | |
304 | case 0: | |
305 | ccw_device_recog_done(cdev, DEV_STATE_OFFLINE); | |
306 | break; | |
307 | case -ETIME: /* Sense id stopped by timeout. */ | |
308 | ccw_device_recog_done(cdev, DEV_STATE_BOXED); | |
309 | break; | |
310 | default: | |
311 | ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER); | |
312 | break; | |
313 | } | |
314 | } | |
315 | ||
76e6fb4b SO |
316 | /** |
317 | * ccw_device_notify() - inform the device's driver about an event | |
318 | * @cdev: device for which an event occured | |
319 | * @event: event that occurred | |
320 | * | |
321 | * Returns: | |
322 | * -%EINVAL if the device is offline or has no driver. | |
323 | * -%EOPNOTSUPP if the device's driver has no notifier registered. | |
324 | * %NOTIFY_OK if the driver wants to keep the device. | |
325 | * %NOTIFY_BAD if the driver doesn't want to keep the device. | |
326 | */ | |
c820de39 CH |
327 | int ccw_device_notify(struct ccw_device *cdev, int event) |
328 | { | |
76e6fb4b SO |
329 | int ret = -EINVAL; |
330 | ||
c820de39 | 331 | if (!cdev->drv) |
76e6fb4b | 332 | goto out; |
c820de39 | 333 | if (!cdev->online) |
76e6fb4b | 334 | goto out; |
91c36919 PO |
335 | CIO_MSG_EVENT(2, "notify called for 0.%x.%04x, event=%d\n", |
336 | cdev->private->dev_id.ssid, cdev->private->dev_id.devno, | |
337 | event); | |
76e6fb4b SO |
338 | if (!cdev->drv->notify) { |
339 | ret = -EOPNOTSUPP; | |
340 | goto out; | |
341 | } | |
342 | if (cdev->drv->notify(cdev, event)) | |
343 | ret = NOTIFY_OK; | |
344 | else | |
345 | ret = NOTIFY_BAD; | |
346 | out: | |
347 | return ret; | |
c820de39 CH |
348 | } |
349 | ||
91c36919 PO |
350 | static void ccw_device_oper_notify(struct ccw_device *cdev) |
351 | { | |
585b954e SO |
352 | struct subchannel *sch = to_subchannel(cdev->dev.parent); |
353 | ||
76e6fb4b | 354 | if (ccw_device_notify(cdev, CIO_OPER) == NOTIFY_OK) { |
94bb0633 | 355 | /* Reenable channel measurements, if needed. */ |
37de53bb | 356 | ccw_device_sched_todo(cdev, CDEV_TODO_ENABLE_CMF); |
585b954e SO |
357 | /* Save indication for new paths. */ |
358 | cdev->private->path_new_mask = sch->vpm; | |
91c36919 PO |
359 | return; |
360 | } | |
361 | /* Driver doesn't want device back. */ | |
362 | ccw_device_set_notoper(cdev); | |
37de53bb | 363 | ccw_device_sched_todo(cdev, CDEV_TODO_REBIND); |
1da177e4 LT |
364 | } |
365 | ||
366 | /* | |
367 | * Finished with online/offline processing. | |
368 | */ | |
369 | static void | |
370 | ccw_device_done(struct ccw_device *cdev, int state) | |
371 | { | |
372 | struct subchannel *sch; | |
373 | ||
374 | sch = to_subchannel(cdev->dev.parent); | |
375 | ||
f1ee3281 CH |
376 | ccw_device_set_timeout(cdev, 0); |
377 | ||
1da177e4 LT |
378 | if (state != DEV_STATE_ONLINE) |
379 | cio_disable_subchannel(sch); | |
380 | ||
381 | /* Reset device status. */ | |
382 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
383 | ||
384 | cdev->private->state = state; | |
385 | ||
9a332116 PO |
386 | switch (state) { |
387 | case DEV_STATE_BOXED: | |
139b83dd ME |
388 | CIO_MSG_EVENT(0, "Boxed device %04x on subchannel %04x\n", |
389 | cdev->private->dev_id.devno, sch->schid.sch_no); | |
76e6fb4b SO |
390 | if (cdev->online && |
391 | ccw_device_notify(cdev, CIO_BOXED) != NOTIFY_OK) | |
37de53bb | 392 | ccw_device_sched_todo(cdev, CDEV_TODO_UNREG); |
47593bfa | 393 | cdev->private->flags.donotify = 0; |
9a332116 PO |
394 | break; |
395 | case DEV_STATE_NOT_OPER: | |
626e476a SO |
396 | CIO_MSG_EVENT(0, "Device %04x gone on subchannel %04x\n", |
397 | cdev->private->dev_id.devno, sch->schid.sch_no); | |
76e6fb4b | 398 | if (ccw_device_notify(cdev, CIO_GONE) != NOTIFY_OK) |
37de53bb | 399 | ccw_device_sched_todo(cdev, CDEV_TODO_UNREG); |
6afcc775 PO |
400 | else |
401 | ccw_device_set_disconnected(cdev); | |
626e476a | 402 | cdev->private->flags.donotify = 0; |
9a332116 PO |
403 | break; |
404 | case DEV_STATE_DISCONNECTED: | |
405 | CIO_MSG_EVENT(0, "Disconnected device %04x on subchannel " | |
406 | "%04x\n", cdev->private->dev_id.devno, | |
407 | sch->schid.sch_no); | |
76e6fb4b | 408 | if (ccw_device_notify(cdev, CIO_NO_PATH) != NOTIFY_OK) |
37de53bb | 409 | ccw_device_sched_todo(cdev, CDEV_TODO_UNREG); |
9a332116 PO |
410 | else |
411 | ccw_device_set_disconnected(cdev); | |
412 | cdev->private->flags.donotify = 0; | |
413 | break; | |
414 | default: | |
415 | break; | |
626e476a | 416 | } |
1da177e4 LT |
417 | |
418 | if (cdev->private->flags.donotify) { | |
419 | cdev->private->flags.donotify = 0; | |
91c36919 | 420 | ccw_device_oper_notify(cdev); |
1da177e4 LT |
421 | } |
422 | wake_up(&cdev->private->wait_q); | |
1da177e4 LT |
423 | } |
424 | ||
1da177e4 LT |
425 | /* |
426 | * Start device recognition. | |
427 | */ | |
736b5db8 | 428 | void ccw_device_recognition(struct ccw_device *cdev) |
1da177e4 | 429 | { |
736b5db8 | 430 | struct subchannel *sch = to_subchannel(cdev->dev.parent); |
1da177e4 LT |
431 | |
432 | /* | |
433 | * We used to start here with a sense pgid to find out whether a device | |
434 | * is locked by someone else. Unfortunately, the sense pgid command | |
435 | * code has other meanings on devices predating the path grouping | |
436 | * algorithm, so we start with sense id and box the device after an | |
437 | * timeout (or if sense pgid during path verification detects the device | |
438 | * is locked, as may happen on newer devices). | |
439 | */ | |
440 | cdev->private->flags.recog_done = 0; | |
441 | cdev->private->state = DEV_STATE_SENSE_ID; | |
736b5db8 PO |
442 | if (cio_enable_subchannel(sch, (u32) (addr_t) sch)) { |
443 | ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER); | |
444 | return; | |
445 | } | |
1da177e4 | 446 | ccw_device_sense_id_start(cdev); |
1da177e4 LT |
447 | } |
448 | ||
449 | /* | |
39f5360b | 450 | * Handle events for states that use the ccw request infrastructure. |
1da177e4 | 451 | */ |
39f5360b | 452 | static void ccw_device_request_event(struct ccw_device *cdev, enum dev_event e) |
1da177e4 | 453 | { |
39f5360b PO |
454 | switch (e) { |
455 | case DEV_EVENT_NOTOPER: | |
456 | ccw_request_notoper(cdev); | |
1da177e4 | 457 | break; |
39f5360b PO |
458 | case DEV_EVENT_INTERRUPT: |
459 | ccw_request_handler(cdev); | |
460 | break; | |
461 | case DEV_EVENT_TIMEOUT: | |
462 | ccw_request_timeout(cdev); | |
1da177e4 LT |
463 | break; |
464 | default: | |
39f5360b | 465 | break; |
1da177e4 LT |
466 | } |
467 | } | |
468 | ||
585b954e SO |
469 | static void ccw_device_report_path_events(struct ccw_device *cdev) |
470 | { | |
471 | struct subchannel *sch = to_subchannel(cdev->dev.parent); | |
472 | int path_event[8]; | |
473 | int chp, mask; | |
474 | ||
475 | for (chp = 0, mask = 0x80; chp < 8; chp++, mask >>= 1) { | |
476 | path_event[chp] = PE_NONE; | |
477 | if (mask & cdev->private->path_gone_mask & ~(sch->vpm)) | |
478 | path_event[chp] |= PE_PATH_GONE; | |
479 | if (mask & cdev->private->path_new_mask & sch->vpm) | |
480 | path_event[chp] |= PE_PATH_AVAILABLE; | |
481 | if (mask & cdev->private->pgid_reset_mask & sch->vpm) | |
482 | path_event[chp] |= PE_PATHGROUP_ESTABLISHED; | |
483 | } | |
484 | if (cdev->online && cdev->drv->path_event) | |
485 | cdev->drv->path_event(cdev, path_event); | |
486 | } | |
487 | ||
488 | static void ccw_device_reset_path_events(struct ccw_device *cdev) | |
489 | { | |
490 | cdev->private->path_gone_mask = 0; | |
491 | cdev->private->path_new_mask = 0; | |
492 | cdev->private->pgid_reset_mask = 0; | |
493 | } | |
494 | ||
1da177e4 LT |
495 | void |
496 | ccw_device_verify_done(struct ccw_device *cdev, int err) | |
497 | { | |
28bdc6f6 PO |
498 | struct subchannel *sch; |
499 | ||
500 | sch = to_subchannel(cdev->dev.parent); | |
501 | /* Update schib - pom may have changed. */ | |
cdb912a4 | 502 | if (cio_update_schib(sch)) { |
7c4d964f PO |
503 | err = -ENODEV; |
504 | goto callback; | |
cdb912a4 | 505 | } |
28bdc6f6 PO |
506 | /* Update lpm with verified path mask. */ |
507 | sch->lpm = sch->vpm; | |
508 | /* Repeat path verification? */ | |
509 | if (cdev->private->flags.doverify) { | |
28bdc6f6 PO |
510 | ccw_device_verify_start(cdev); |
511 | return; | |
512 | } | |
7c4d964f | 513 | callback: |
1da177e4 | 514 | switch (err) { |
1da177e4 LT |
515 | case 0: |
516 | ccw_device_done(cdev, DEV_STATE_ONLINE); | |
517 | /* Deliver fake irb to device driver, if needed. */ | |
518 | if (cdev->private->flags.fake_irb) { | |
519 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
23d805b6 PO |
520 | cdev->private->irb.scsw.cmd.cc = 1; |
521 | cdev->private->irb.scsw.cmd.fctl = SCSW_FCTL_START_FUNC; | |
522 | cdev->private->irb.scsw.cmd.actl = SCSW_ACTL_START_PEND; | |
523 | cdev->private->irb.scsw.cmd.stctl = | |
524 | SCSW_STCTL_STATUS_PEND; | |
1da177e4 LT |
525 | cdev->private->flags.fake_irb = 0; |
526 | if (cdev->handler) | |
527 | cdev->handler(cdev, cdev->private->intparm, | |
528 | &cdev->private->irb); | |
529 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
530 | } | |
585b954e | 531 | ccw_device_report_path_events(cdev); |
1da177e4 LT |
532 | break; |
533 | case -ETIME: | |
52ef0608 | 534 | case -EUSERS: |
8b42f5c2 PO |
535 | /* Reset oper notify indication after verify error. */ |
536 | cdev->private->flags.donotify = 0; | |
1da177e4 LT |
537 | ccw_device_done(cdev, DEV_STATE_BOXED); |
538 | break; | |
7c4d964f PO |
539 | case -EACCES: |
540 | /* Reset oper notify indication after verify error. */ | |
541 | cdev->private->flags.donotify = 0; | |
542 | ccw_device_done(cdev, DEV_STATE_DISCONNECTED); | |
543 | break; | |
1da177e4 | 544 | default: |
8b42f5c2 PO |
545 | /* Reset oper notify indication after verify error. */ |
546 | cdev->private->flags.donotify = 0; | |
7c4d964f | 547 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); |
1da177e4 LT |
548 | break; |
549 | } | |
585b954e | 550 | ccw_device_reset_path_events(cdev); |
1da177e4 LT |
551 | } |
552 | ||
553 | /* | |
554 | * Get device online. | |
555 | */ | |
556 | int | |
557 | ccw_device_online(struct ccw_device *cdev) | |
558 | { | |
559 | struct subchannel *sch; | |
560 | int ret; | |
561 | ||
562 | if ((cdev->private->state != DEV_STATE_OFFLINE) && | |
563 | (cdev->private->state != DEV_STATE_BOXED)) | |
564 | return -EINVAL; | |
565 | sch = to_subchannel(cdev->dev.parent); | |
edf22096 | 566 | ret = cio_enable_subchannel(sch, (u32)(addr_t)sch); |
1da177e4 LT |
567 | if (ret != 0) { |
568 | /* Couldn't enable the subchannel for i/o. Sick device. */ | |
569 | if (ret == -ENODEV) | |
570 | dev_fsm_event(cdev, DEV_EVENT_NOTOPER); | |
571 | return ret; | |
572 | } | |
52ef0608 PO |
573 | /* Start initial path verification. */ |
574 | cdev->private->state = DEV_STATE_VERIFY; | |
575 | ccw_device_verify_start(cdev); | |
1da177e4 LT |
576 | return 0; |
577 | } | |
578 | ||
579 | void | |
580 | ccw_device_disband_done(struct ccw_device *cdev, int err) | |
581 | { | |
582 | switch (err) { | |
583 | case 0: | |
584 | ccw_device_done(cdev, DEV_STATE_OFFLINE); | |
585 | break; | |
586 | case -ETIME: | |
587 | ccw_device_done(cdev, DEV_STATE_BOXED); | |
588 | break; | |
589 | default: | |
3ecb0a5a | 590 | cdev->private->flags.donotify = 0; |
1da177e4 LT |
591 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); |
592 | break; | |
593 | } | |
594 | } | |
595 | ||
596 | /* | |
597 | * Shutdown device. | |
598 | */ | |
599 | int | |
600 | ccw_device_offline(struct ccw_device *cdev) | |
601 | { | |
602 | struct subchannel *sch; | |
603 | ||
b301ea8c PO |
604 | /* Allow ccw_device_offline while disconnected. */ |
605 | if (cdev->private->state == DEV_STATE_DISCONNECTED || | |
606 | cdev->private->state == DEV_STATE_NOT_OPER) { | |
607 | cdev->private->flags.donotify = 0; | |
608 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); | |
609 | return 0; | |
610 | } | |
102e835d PO |
611 | if (cdev->private->state == DEV_STATE_BOXED) { |
612 | ccw_device_done(cdev, DEV_STATE_BOXED); | |
613 | return 0; | |
614 | } | |
d7b5a4c9 CH |
615 | if (ccw_device_is_orphan(cdev)) { |
616 | ccw_device_done(cdev, DEV_STATE_OFFLINE); | |
617 | return 0; | |
618 | } | |
1da177e4 | 619 | sch = to_subchannel(cdev->dev.parent); |
cdb912a4 | 620 | if (cio_update_schib(sch)) |
1da177e4 | 621 | return -ENODEV; |
23d805b6 | 622 | if (scsw_actl(&sch->schib.scsw) != 0) |
1da177e4 | 623 | return -EBUSY; |
23d805b6 PO |
624 | if (cdev->private->state != DEV_STATE_ONLINE) |
625 | return -EINVAL; | |
1da177e4 | 626 | /* Are we doing path grouping? */ |
454e1fa1 | 627 | if (!cdev->private->flags.pgroup) { |
1da177e4 LT |
628 | /* No, set state offline immediately. */ |
629 | ccw_device_done(cdev, DEV_STATE_OFFLINE); | |
630 | return 0; | |
631 | } | |
632 | /* Start Set Path Group commands. */ | |
633 | cdev->private->state = DEV_STATE_DISBAND_PGID; | |
634 | ccw_device_disband_start(cdev); | |
635 | return 0; | |
636 | } | |
637 | ||
1da177e4 | 638 | /* |
3f4cf6e7 | 639 | * Handle not operational event in non-special state. |
1da177e4 | 640 | */ |
3f4cf6e7 CH |
641 | static void ccw_device_generic_notoper(struct ccw_device *cdev, |
642 | enum dev_event dev_event) | |
1da177e4 | 643 | { |
76e6fb4b | 644 | if (ccw_device_notify(cdev, CIO_GONE) != NOTIFY_OK) |
37de53bb | 645 | ccw_device_sched_todo(cdev, CDEV_TODO_UNREG); |
6afcc775 PO |
646 | else |
647 | ccw_device_set_disconnected(cdev); | |
1da177e4 LT |
648 | } |
649 | ||
1f1148c8 PO |
650 | /* |
651 | * Handle path verification event in offline state. | |
652 | */ | |
653 | static void ccw_device_offline_verify(struct ccw_device *cdev, | |
654 | enum dev_event dev_event) | |
655 | { | |
656 | struct subchannel *sch = to_subchannel(cdev->dev.parent); | |
657 | ||
658 | css_schedule_eval(sch->schid); | |
659 | } | |
660 | ||
1da177e4 LT |
661 | /* |
662 | * Handle path verification event. | |
663 | */ | |
664 | static void | |
665 | ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event) | |
666 | { | |
667 | struct subchannel *sch; | |
668 | ||
1da177e4 LT |
669 | if (cdev->private->state == DEV_STATE_W4SENSE) { |
670 | cdev->private->flags.doverify = 1; | |
671 | return; | |
672 | } | |
673 | sch = to_subchannel(cdev->dev.parent); | |
674 | /* | |
675 | * Since we might not just be coming from an interrupt from the | |
676 | * subchannel we have to update the schib. | |
677 | */ | |
cdb912a4 SO |
678 | if (cio_update_schib(sch)) { |
679 | ccw_device_verify_done(cdev, -ENODEV); | |
680 | return; | |
681 | } | |
1da177e4 | 682 | |
23d805b6 PO |
683 | if (scsw_actl(&sch->schib.scsw) != 0 || |
684 | (scsw_stctl(&sch->schib.scsw) & SCSW_STCTL_STATUS_PEND) || | |
685 | (scsw_stctl(&cdev->private->irb.scsw) & SCSW_STCTL_STATUS_PEND)) { | |
1da177e4 LT |
686 | /* |
687 | * No final status yet or final status not yet delivered | |
688 | * to the device driver. Can't do path verfication now, | |
689 | * delay until final status was delivered. | |
690 | */ | |
691 | cdev->private->flags.doverify = 1; | |
692 | return; | |
693 | } | |
694 | /* Device is idle, we can do the path verification. */ | |
695 | cdev->private->state = DEV_STATE_VERIFY; | |
696 | ccw_device_verify_start(cdev); | |
697 | } | |
698 | ||
d7d12ef2 PO |
699 | /* |
700 | * Handle path verification event in boxed state. | |
701 | */ | |
702 | static void ccw_device_boxed_verify(struct ccw_device *cdev, | |
703 | enum dev_event dev_event) | |
704 | { | |
705 | struct subchannel *sch = to_subchannel(cdev->dev.parent); | |
706 | ||
707 | if (cdev->online) { | |
708 | if (cio_enable_subchannel(sch, (u32) (addr_t) sch)) | |
709 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); | |
710 | else | |
711 | ccw_device_online_verify(cdev, dev_event); | |
712 | } else | |
713 | css_schedule_eval(sch->schid); | |
714 | } | |
715 | ||
1da177e4 LT |
716 | /* |
717 | * Got an interrupt for a normal io (state online). | |
718 | */ | |
719 | static void | |
720 | ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event) | |
721 | { | |
722 | struct irb *irb; | |
83262d63 | 723 | int is_cmd; |
1da177e4 | 724 | |
cbb870c8 | 725 | irb = (struct irb *)&S390_lowcore.irb; |
83262d63 | 726 | is_cmd = !scsw_is_tm(&irb->scsw); |
1da177e4 | 727 | /* Check for unsolicited interrupt. */ |
23d805b6 | 728 | if (!scsw_is_solicited(&irb->scsw)) { |
83262d63 | 729 | if (is_cmd && (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) && |
1da177e4 LT |
730 | !irb->esw.esw0.erw.cons) { |
731 | /* Unit check but no sense data. Need basic sense. */ | |
732 | if (ccw_device_do_sense(cdev, irb) != 0) | |
733 | goto call_handler_unsol; | |
e0ec5749 | 734 | memcpy(&cdev->private->irb, irb, sizeof(struct irb)); |
1da177e4 LT |
735 | cdev->private->state = DEV_STATE_W4SENSE; |
736 | cdev->private->intparm = 0; | |
737 | return; | |
738 | } | |
739 | call_handler_unsol: | |
740 | if (cdev->handler) | |
741 | cdev->handler (cdev, 0, irb); | |
18374d37 CH |
742 | if (cdev->private->flags.doverify) |
743 | ccw_device_online_verify(cdev, 0); | |
1da177e4 LT |
744 | return; |
745 | } | |
746 | /* Accumulate status and find out if a basic sense is needed. */ | |
747 | ccw_device_accumulate_irb(cdev, irb); | |
83262d63 | 748 | if (is_cmd && cdev->private->flags.dosense) { |
1da177e4 LT |
749 | if (ccw_device_do_sense(cdev, irb) == 0) { |
750 | cdev->private->state = DEV_STATE_W4SENSE; | |
751 | } | |
752 | return; | |
753 | } | |
754 | /* Call the handler. */ | |
755 | if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify) | |
756 | /* Start delayed path verification. */ | |
757 | ccw_device_online_verify(cdev, 0); | |
758 | } | |
759 | ||
760 | /* | |
761 | * Got an timeout in online state. | |
762 | */ | |
763 | static void | |
764 | ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
765 | { | |
766 | int ret; | |
767 | ||
768 | ccw_device_set_timeout(cdev, 0); | |
769 | ret = ccw_device_cancel_halt_clear(cdev); | |
770 | if (ret == -EBUSY) { | |
771 | ccw_device_set_timeout(cdev, 3*HZ); | |
772 | cdev->private->state = DEV_STATE_TIMEOUT_KILL; | |
773 | return; | |
774 | } | |
3f4cf6e7 CH |
775 | if (ret == -ENODEV) |
776 | dev_fsm_event(cdev, DEV_EVENT_NOTOPER); | |
777 | else if (cdev->handler) | |
1da177e4 LT |
778 | cdev->handler(cdev, cdev->private->intparm, |
779 | ERR_PTR(-ETIMEDOUT)); | |
780 | } | |
781 | ||
782 | /* | |
783 | * Got an interrupt for a basic sense. | |
784 | */ | |
2b67fc46 | 785 | static void |
1da177e4 LT |
786 | ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event) |
787 | { | |
788 | struct irb *irb; | |
789 | ||
cbb870c8 | 790 | irb = (struct irb *)&S390_lowcore.irb; |
1da177e4 | 791 | /* Check for unsolicited interrupt. */ |
23d805b6 PO |
792 | if (scsw_stctl(&irb->scsw) == |
793 | (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) { | |
794 | if (scsw_cc(&irb->scsw) == 1) | |
1da177e4 LT |
795 | /* Basic sense hasn't started. Try again. */ |
796 | ccw_device_do_sense(cdev, irb); | |
797 | else { | |
139b83dd | 798 | CIO_MSG_EVENT(0, "0.%x.%04x: unsolicited " |
e556bbbd CH |
799 | "interrupt during w4sense...\n", |
800 | cdev->private->dev_id.ssid, | |
801 | cdev->private->dev_id.devno); | |
1da177e4 LT |
802 | if (cdev->handler) |
803 | cdev->handler (cdev, 0, irb); | |
804 | } | |
805 | return; | |
806 | } | |
3ba1998e CH |
807 | /* |
808 | * Check if a halt or clear has been issued in the meanwhile. If yes, | |
809 | * only deliver the halt/clear interrupt to the device driver as if it | |
810 | * had killed the original request. | |
811 | */ | |
23d805b6 PO |
812 | if (scsw_fctl(&irb->scsw) & |
813 | (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) { | |
3ba1998e CH |
814 | cdev->private->flags.dosense = 0; |
815 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
816 | ccw_device_accumulate_irb(cdev, irb); | |
817 | goto call_handler; | |
818 | } | |
1da177e4 LT |
819 | /* Add basic sense info to irb. */ |
820 | ccw_device_accumulate_basic_sense(cdev, irb); | |
821 | if (cdev->private->flags.dosense) { | |
822 | /* Another basic sense is needed. */ | |
823 | ccw_device_do_sense(cdev, irb); | |
824 | return; | |
825 | } | |
3ba1998e | 826 | call_handler: |
1da177e4 | 827 | cdev->private->state = DEV_STATE_ONLINE; |
217ee6c6 ME |
828 | /* In case sensing interfered with setting the device online */ |
829 | wake_up(&cdev->private->wait_q); | |
1da177e4 LT |
830 | /* Call the handler. */ |
831 | if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify) | |
832 | /* Start delayed path verification. */ | |
833 | ccw_device_online_verify(cdev, 0); | |
834 | } | |
835 | ||
1da177e4 LT |
836 | static void |
837 | ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event) | |
838 | { | |
839 | struct subchannel *sch; | |
840 | ||
841 | sch = to_subchannel(cdev->dev.parent); | |
842 | ccw_device_set_timeout(cdev, 0); | |
7c8427c3 CH |
843 | /* Start delayed path verification. */ |
844 | ccw_device_online_verify(cdev, 0); | |
1da177e4 | 845 | /* OK, i/o is dead now. Call interrupt handler. */ |
1da177e4 LT |
846 | if (cdev->handler) |
847 | cdev->handler(cdev, cdev->private->intparm, | |
e7769b48 | 848 | ERR_PTR(-EIO)); |
1da177e4 LT |
849 | } |
850 | ||
851 | static void | |
852 | ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
853 | { | |
854 | int ret; | |
855 | ||
856 | ret = ccw_device_cancel_halt_clear(cdev); | |
857 | if (ret == -EBUSY) { | |
858 | ccw_device_set_timeout(cdev, 3*HZ); | |
859 | return; | |
860 | } | |
7c8427c3 CH |
861 | /* Start delayed path verification. */ |
862 | ccw_device_online_verify(cdev, 0); | |
1da177e4 LT |
863 | if (cdev->handler) |
864 | cdev->handler(cdev, cdev->private->intparm, | |
e7769b48 | 865 | ERR_PTR(-EIO)); |
1da177e4 LT |
866 | } |
867 | ||
c820de39 | 868 | void ccw_device_kill_io(struct ccw_device *cdev) |
1da177e4 LT |
869 | { |
870 | int ret; | |
1da177e4 | 871 | |
1da177e4 LT |
872 | ret = ccw_device_cancel_halt_clear(cdev); |
873 | if (ret == -EBUSY) { | |
874 | ccw_device_set_timeout(cdev, 3*HZ); | |
875 | cdev->private->state = DEV_STATE_TIMEOUT_KILL; | |
876 | return; | |
877 | } | |
7c8427c3 CH |
878 | /* Start delayed path verification. */ |
879 | ccw_device_online_verify(cdev, 0); | |
1da177e4 LT |
880 | if (cdev->handler) |
881 | cdev->handler(cdev, cdev->private->intparm, | |
e7769b48 | 882 | ERR_PTR(-EIO)); |
1da177e4 LT |
883 | } |
884 | ||
885 | static void | |
28bdc6f6 | 886 | ccw_device_delay_verify(struct ccw_device *cdev, enum dev_event dev_event) |
1da177e4 | 887 | { |
28bdc6f6 | 888 | /* Start verification after current task finished. */ |
7e560814 | 889 | cdev->private->flags.doverify = 1; |
1da177e4 LT |
890 | } |
891 | ||
1da177e4 LT |
892 | static void |
893 | ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event) | |
894 | { | |
895 | struct subchannel *sch; | |
896 | ||
897 | sch = to_subchannel(cdev->dev.parent); | |
edf22096 | 898 | if (cio_enable_subchannel(sch, (u32)(addr_t)sch) != 0) |
1da177e4 LT |
899 | /* Couldn't enable the subchannel for i/o. Sick device. */ |
900 | return; | |
1da177e4 LT |
901 | cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID; |
902 | ccw_device_sense_id_start(cdev); | |
903 | } | |
904 | ||
c820de39 | 905 | void ccw_device_trigger_reprobe(struct ccw_device *cdev) |
1da177e4 | 906 | { |
c820de39 | 907 | struct subchannel *sch; |
1da177e4 | 908 | |
1da177e4 LT |
909 | if (cdev->private->state != DEV_STATE_DISCONNECTED) |
910 | return; | |
911 | ||
c820de39 | 912 | sch = to_subchannel(cdev->dev.parent); |
1da177e4 | 913 | /* Update some values. */ |
cdb912a4 | 914 | if (cio_update_schib(sch)) |
7674da77 | 915 | return; |
1da177e4 LT |
916 | /* |
917 | * The pim, pam, pom values may not be accurate, but they are the best | |
918 | * we have before performing device selection :/ | |
919 | */ | |
28bdc6f6 | 920 | sch->lpm = sch->schib.pmcw.pam & sch->opm; |
13952ec1 SO |
921 | /* |
922 | * Use the initial configuration since we can't be shure that the old | |
923 | * paths are valid. | |
924 | */ | |
925 | io_subchannel_init_config(sch); | |
f444cc0e SO |
926 | if (cio_commit_config(sch)) |
927 | return; | |
13952ec1 | 928 | |
1da177e4 | 929 | /* We should also udate ssd info, but this has to wait. */ |
d7b5a4c9 | 930 | /* Check if this is another device which appeared on the same sch. */ |
5d6e6b6f PO |
931 | if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) |
932 | css_schedule_eval(sch->schid); | |
933 | else | |
d7b5a4c9 | 934 | ccw_device_start_id(cdev, 0); |
1da177e4 LT |
935 | } |
936 | ||
16b9a057 PO |
937 | static void ccw_device_disabled_irq(struct ccw_device *cdev, |
938 | enum dev_event dev_event) | |
1da177e4 LT |
939 | { |
940 | struct subchannel *sch; | |
941 | ||
942 | sch = to_subchannel(cdev->dev.parent); | |
943 | /* | |
16b9a057 | 944 | * An interrupt in a disabled state means a previous disable was not |
ed04b892 | 945 | * successful - should not happen, but we try to disable again. |
1da177e4 LT |
946 | */ |
947 | cio_disable_subchannel(sch); | |
948 | } | |
949 | ||
950 | static void | |
951 | ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event) | |
952 | { | |
953 | retry_set_schib(cdev); | |
954 | cdev->private->state = DEV_STATE_ONLINE; | |
955 | dev_fsm_event(cdev, dev_event); | |
956 | } | |
957 | ||
94bb0633 CH |
958 | static void ccw_device_update_cmfblock(struct ccw_device *cdev, |
959 | enum dev_event dev_event) | |
960 | { | |
961 | cmf_retry_copy_block(cdev); | |
962 | cdev->private->state = DEV_STATE_ONLINE; | |
963 | dev_fsm_event(cdev, dev_event); | |
964 | } | |
1da177e4 LT |
965 | |
966 | static void | |
967 | ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event) | |
968 | { | |
969 | ccw_device_set_timeout(cdev, 0); | |
56e6b796 | 970 | cdev->private->state = DEV_STATE_NOT_OPER; |
1da177e4 LT |
971 | wake_up(&cdev->private->wait_q); |
972 | } | |
973 | ||
974 | static void | |
975 | ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
976 | { | |
977 | int ret; | |
978 | ||
979 | ret = ccw_device_cancel_halt_clear(cdev); | |
56e6b796 SO |
980 | if (ret == -EBUSY) { |
981 | ccw_device_set_timeout(cdev, HZ/10); | |
982 | } else { | |
1da177e4 LT |
983 | cdev->private->state = DEV_STATE_NOT_OPER; |
984 | wake_up(&cdev->private->wait_q); | |
1da177e4 LT |
985 | } |
986 | } | |
987 | ||
988 | /* | |
989 | * No operation action. This is used e.g. to ignore a timeout event in | |
990 | * state offline. | |
991 | */ | |
992 | static void | |
993 | ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event) | |
994 | { | |
995 | } | |
996 | ||
1da177e4 LT |
997 | /* |
998 | * device statemachine | |
999 | */ | |
1000 | fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = { | |
1001 | [DEV_STATE_NOT_OPER] = { | |
1002 | [DEV_EVENT_NOTOPER] = ccw_device_nop, | |
16b9a057 | 1003 | [DEV_EVENT_INTERRUPT] = ccw_device_disabled_irq, |
1da177e4 LT |
1004 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, |
1005 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1006 | }, | |
1007 | [DEV_STATE_SENSE_PGID] = { | |
9679baaf PO |
1008 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
1009 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, | |
1010 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, | |
1da177e4 LT |
1011 | [DEV_EVENT_VERIFY] = ccw_device_nop, |
1012 | }, | |
1013 | [DEV_STATE_SENSE_ID] = { | |
39f5360b PO |
1014 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
1015 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, | |
1016 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, | |
1da177e4 LT |
1017 | [DEV_EVENT_VERIFY] = ccw_device_nop, |
1018 | }, | |
1019 | [DEV_STATE_OFFLINE] = { | |
3f4cf6e7 | 1020 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
16b9a057 | 1021 | [DEV_EVENT_INTERRUPT] = ccw_device_disabled_irq, |
1da177e4 | 1022 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, |
1f1148c8 | 1023 | [DEV_EVENT_VERIFY] = ccw_device_offline_verify, |
1da177e4 LT |
1024 | }, |
1025 | [DEV_STATE_VERIFY] = { | |
9679baaf PO |
1026 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
1027 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, | |
1028 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, | |
28bdc6f6 | 1029 | [DEV_EVENT_VERIFY] = ccw_device_delay_verify, |
1da177e4 LT |
1030 | }, |
1031 | [DEV_STATE_ONLINE] = { | |
3f4cf6e7 | 1032 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
1da177e4 LT |
1033 | [DEV_EVENT_INTERRUPT] = ccw_device_irq, |
1034 | [DEV_EVENT_TIMEOUT] = ccw_device_online_timeout, | |
1035 | [DEV_EVENT_VERIFY] = ccw_device_online_verify, | |
1036 | }, | |
1037 | [DEV_STATE_W4SENSE] = { | |
3f4cf6e7 | 1038 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
1da177e4 LT |
1039 | [DEV_EVENT_INTERRUPT] = ccw_device_w4sense, |
1040 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, | |
1041 | [DEV_EVENT_VERIFY] = ccw_device_online_verify, | |
1042 | }, | |
1043 | [DEV_STATE_DISBAND_PGID] = { | |
9679baaf PO |
1044 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
1045 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, | |
1046 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, | |
1da177e4 LT |
1047 | [DEV_EVENT_VERIFY] = ccw_device_nop, |
1048 | }, | |
1049 | [DEV_STATE_BOXED] = { | |
3f4cf6e7 | 1050 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
d7d12ef2 PO |
1051 | [DEV_EVENT_INTERRUPT] = ccw_device_nop, |
1052 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, | |
1053 | [DEV_EVENT_VERIFY] = ccw_device_boxed_verify, | |
1da177e4 LT |
1054 | }, |
1055 | /* states to wait for i/o completion before doing something */ | |
1da177e4 | 1056 | [DEV_STATE_TIMEOUT_KILL] = { |
3f4cf6e7 | 1057 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
1da177e4 LT |
1058 | [DEV_EVENT_INTERRUPT] = ccw_device_killing_irq, |
1059 | [DEV_EVENT_TIMEOUT] = ccw_device_killing_timeout, | |
1060 | [DEV_EVENT_VERIFY] = ccw_device_nop, //FIXME | |
1061 | }, | |
1da177e4 LT |
1062 | [DEV_STATE_QUIESCE] = { |
1063 | [DEV_EVENT_NOTOPER] = ccw_device_quiesce_done, | |
1064 | [DEV_EVENT_INTERRUPT] = ccw_device_quiesce_done, | |
1065 | [DEV_EVENT_TIMEOUT] = ccw_device_quiesce_timeout, | |
1066 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1067 | }, | |
1068 | /* special states for devices gone not operational */ | |
1069 | [DEV_STATE_DISCONNECTED] = { | |
1070 | [DEV_EVENT_NOTOPER] = ccw_device_nop, | |
1071 | [DEV_EVENT_INTERRUPT] = ccw_device_start_id, | |
16b9a057 | 1072 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, |
28bdc6f6 | 1073 | [DEV_EVENT_VERIFY] = ccw_device_start_id, |
1da177e4 LT |
1074 | }, |
1075 | [DEV_STATE_DISCONNECTED_SENSE_ID] = { | |
39f5360b PO |
1076 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
1077 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, | |
1078 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, | |
1da177e4 LT |
1079 | [DEV_EVENT_VERIFY] = ccw_device_nop, |
1080 | }, | |
1081 | [DEV_STATE_CMFCHANGE] = { | |
1082 | [DEV_EVENT_NOTOPER] = ccw_device_change_cmfstate, | |
1083 | [DEV_EVENT_INTERRUPT] = ccw_device_change_cmfstate, | |
1084 | [DEV_EVENT_TIMEOUT] = ccw_device_change_cmfstate, | |
1085 | [DEV_EVENT_VERIFY] = ccw_device_change_cmfstate, | |
1086 | }, | |
94bb0633 CH |
1087 | [DEV_STATE_CMFUPDATE] = { |
1088 | [DEV_EVENT_NOTOPER] = ccw_device_update_cmfblock, | |
1089 | [DEV_EVENT_INTERRUPT] = ccw_device_update_cmfblock, | |
1090 | [DEV_EVENT_TIMEOUT] = ccw_device_update_cmfblock, | |
1091 | [DEV_EVENT_VERIFY] = ccw_device_update_cmfblock, | |
1092 | }, | |
d7d12ef2 PO |
1093 | [DEV_STATE_STEAL_LOCK] = { |
1094 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, | |
1095 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, | |
1096 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, | |
1097 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1098 | }, | |
1da177e4 LT |
1099 | }; |
1100 | ||
1da177e4 | 1101 | EXPORT_SYMBOL_GPL(ccw_device_set_timeout); |