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Commit | Line | Data |
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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 | } | |
376ae475 PO |
177 | /* Function was unsuccessful */ |
178 | CIO_MSG_EVENT(0, "0.%x.%04x: could not stop I/O\n", | |
179 | cdev->private->dev_id.ssid, cdev->private->dev_id.devno); | |
180 | return -EIO; | |
1da177e4 LT |
181 | } |
182 | ||
823d494a | 183 | void ccw_device_update_sense_data(struct ccw_device *cdev) |
1da177e4 | 184 | { |
823d494a SO |
185 | memset(&cdev->id, 0, sizeof(cdev->id)); |
186 | cdev->id.cu_type = cdev->private->senseid.cu_type; | |
187 | cdev->id.cu_model = cdev->private->senseid.cu_model; | |
188 | cdev->id.dev_type = cdev->private->senseid.dev_type; | |
189 | cdev->id.dev_model = cdev->private->senseid.dev_model; | |
190 | } | |
1da177e4 | 191 | |
823d494a SO |
192 | int ccw_device_test_sense_data(struct ccw_device *cdev) |
193 | { | |
194 | return cdev->id.cu_type == cdev->private->senseid.cu_type && | |
195 | cdev->id.cu_model == cdev->private->senseid.cu_model && | |
196 | cdev->id.dev_type == cdev->private->senseid.dev_type && | |
197 | cdev->id.dev_model == cdev->private->senseid.dev_model; | |
1da177e4 LT |
198 | } |
199 | ||
200 | /* | |
201 | * The machine won't give us any notification by machine check if a chpid has | |
202 | * been varied online on the SE so we have to find out by magic (i. e. driving | |
203 | * the channel subsystem to device selection and updating our path masks). | |
204 | */ | |
4d284cac | 205 | static void |
1da177e4 LT |
206 | __recover_lost_chpids(struct subchannel *sch, int old_lpm) |
207 | { | |
208 | int mask, i; | |
f86635fa | 209 | struct chp_id chpid; |
1da177e4 | 210 | |
f86635fa | 211 | chp_id_init(&chpid); |
1da177e4 LT |
212 | for (i = 0; i<8; i++) { |
213 | mask = 0x80 >> i; | |
214 | if (!(sch->lpm & mask)) | |
215 | continue; | |
216 | if (old_lpm & mask) | |
217 | continue; | |
f86635fa | 218 | chpid.id = sch->schib.pmcw.chpid[i]; |
83b3370c PO |
219 | if (!chp_is_registered(chpid)) |
220 | css_schedule_eval_all(); | |
1da177e4 LT |
221 | } |
222 | } | |
223 | ||
224 | /* | |
225 | * Stop device recognition. | |
226 | */ | |
227 | static void | |
228 | ccw_device_recog_done(struct ccw_device *cdev, int state) | |
229 | { | |
230 | struct subchannel *sch; | |
823d494a | 231 | int old_lpm; |
1da177e4 LT |
232 | |
233 | sch = to_subchannel(cdev->dev.parent); | |
234 | ||
ec64333c SO |
235 | if (cio_disable_subchannel(sch)) |
236 | state = DEV_STATE_NOT_OPER; | |
1da177e4 LT |
237 | /* |
238 | * Now that we tried recognition, we have performed device selection | |
239 | * through ssch() and the path information is up to date. | |
240 | */ | |
241 | old_lpm = sch->lpm; | |
cdb912a4 | 242 | |
4ffa9234 | 243 | /* Check since device may again have become not operational. */ |
cdb912a4 | 244 | if (cio_update_schib(sch)) |
4ffa9234 | 245 | state = DEV_STATE_NOT_OPER; |
cdb912a4 SO |
246 | else |
247 | sch->lpm = sch->schib.pmcw.pam & sch->opm; | |
248 | ||
1da177e4 LT |
249 | if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) |
250 | /* Force reprobe on all chpids. */ | |
251 | old_lpm = 0; | |
252 | if (sch->lpm != old_lpm) | |
253 | __recover_lost_chpids(sch, old_lpm); | |
47593bfa SO |
254 | if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID && |
255 | (state == DEV_STATE_NOT_OPER || state == DEV_STATE_BOXED)) { | |
256 | cdev->private->flags.recog_done = 1; | |
257 | cdev->private->state = DEV_STATE_DISCONNECTED; | |
258 | wake_up(&cdev->private->wait_q); | |
259 | return; | |
1da177e4 | 260 | } |
823d494a SO |
261 | if (cdev->private->flags.resuming) { |
262 | cdev->private->state = state; | |
263 | cdev->private->flags.recog_done = 1; | |
264 | wake_up(&cdev->private->wait_q); | |
265 | return; | |
266 | } | |
1da177e4 LT |
267 | switch (state) { |
268 | case DEV_STATE_NOT_OPER: | |
1da177e4 LT |
269 | break; |
270 | case DEV_STATE_OFFLINE: | |
823d494a SO |
271 | if (!cdev->online) { |
272 | ccw_device_update_sense_data(cdev); | |
823d494a | 273 | break; |
1da177e4 | 274 | } |
823d494a SO |
275 | cdev->private->state = DEV_STATE_OFFLINE; |
276 | cdev->private->flags.recog_done = 1; | |
277 | if (ccw_device_test_sense_data(cdev)) { | |
278 | cdev->private->flags.donotify = 1; | |
279 | ccw_device_online(cdev); | |
280 | wake_up(&cdev->private->wait_q); | |
281 | } else { | |
282 | ccw_device_update_sense_data(cdev); | |
37de53bb | 283 | ccw_device_sched_todo(cdev, CDEV_TODO_REBIND); |
1da177e4 | 284 | } |
823d494a | 285 | return; |
1da177e4 | 286 | case DEV_STATE_BOXED: |
47593bfa SO |
287 | if (cdev->id.cu_type != 0) { /* device was recognized before */ |
288 | cdev->private->flags.recog_done = 1; | |
289 | cdev->private->state = DEV_STATE_BOXED; | |
290 | wake_up(&cdev->private->wait_q); | |
291 | return; | |
292 | } | |
1da177e4 LT |
293 | break; |
294 | } | |
295 | cdev->private->state = state; | |
296 | io_subchannel_recog_done(cdev); | |
156013ff | 297 | wake_up(&cdev->private->wait_q); |
1da177e4 LT |
298 | } |
299 | ||
300 | /* | |
301 | * Function called from device_id.c after sense id has completed. | |
302 | */ | |
303 | void | |
304 | ccw_device_sense_id_done(struct ccw_device *cdev, int err) | |
305 | { | |
306 | switch (err) { | |
307 | case 0: | |
308 | ccw_device_recog_done(cdev, DEV_STATE_OFFLINE); | |
309 | break; | |
310 | case -ETIME: /* Sense id stopped by timeout. */ | |
311 | ccw_device_recog_done(cdev, DEV_STATE_BOXED); | |
312 | break; | |
313 | default: | |
314 | ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER); | |
315 | break; | |
316 | } | |
317 | } | |
318 | ||
76e6fb4b SO |
319 | /** |
320 | * ccw_device_notify() - inform the device's driver about an event | |
25985edc | 321 | * @cdev: device for which an event occurred |
76e6fb4b SO |
322 | * @event: event that occurred |
323 | * | |
324 | * Returns: | |
325 | * -%EINVAL if the device is offline or has no driver. | |
326 | * -%EOPNOTSUPP if the device's driver has no notifier registered. | |
327 | * %NOTIFY_OK if the driver wants to keep the device. | |
328 | * %NOTIFY_BAD if the driver doesn't want to keep the device. | |
329 | */ | |
c820de39 CH |
330 | int ccw_device_notify(struct ccw_device *cdev, int event) |
331 | { | |
76e6fb4b SO |
332 | int ret = -EINVAL; |
333 | ||
c820de39 | 334 | if (!cdev->drv) |
76e6fb4b | 335 | goto out; |
c820de39 | 336 | if (!cdev->online) |
76e6fb4b | 337 | goto out; |
91c36919 PO |
338 | CIO_MSG_EVENT(2, "notify called for 0.%x.%04x, event=%d\n", |
339 | cdev->private->dev_id.ssid, cdev->private->dev_id.devno, | |
340 | event); | |
76e6fb4b SO |
341 | if (!cdev->drv->notify) { |
342 | ret = -EOPNOTSUPP; | |
343 | goto out; | |
344 | } | |
345 | if (cdev->drv->notify(cdev, event)) | |
346 | ret = NOTIFY_OK; | |
347 | else | |
348 | ret = NOTIFY_BAD; | |
349 | out: | |
350 | return ret; | |
c820de39 CH |
351 | } |
352 | ||
91c36919 PO |
353 | static void ccw_device_oper_notify(struct ccw_device *cdev) |
354 | { | |
585b954e SO |
355 | struct subchannel *sch = to_subchannel(cdev->dev.parent); |
356 | ||
76e6fb4b | 357 | if (ccw_device_notify(cdev, CIO_OPER) == NOTIFY_OK) { |
94bb0633 | 358 | /* Reenable channel measurements, if needed. */ |
37de53bb | 359 | ccw_device_sched_todo(cdev, CDEV_TODO_ENABLE_CMF); |
585b954e SO |
360 | /* Save indication for new paths. */ |
361 | cdev->private->path_new_mask = sch->vpm; | |
91c36919 PO |
362 | return; |
363 | } | |
364 | /* Driver doesn't want device back. */ | |
365 | ccw_device_set_notoper(cdev); | |
37de53bb | 366 | ccw_device_sched_todo(cdev, CDEV_TODO_REBIND); |
1da177e4 LT |
367 | } |
368 | ||
369 | /* | |
370 | * Finished with online/offline processing. | |
371 | */ | |
372 | static void | |
373 | ccw_device_done(struct ccw_device *cdev, int state) | |
374 | { | |
375 | struct subchannel *sch; | |
376 | ||
377 | sch = to_subchannel(cdev->dev.parent); | |
378 | ||
f1ee3281 CH |
379 | ccw_device_set_timeout(cdev, 0); |
380 | ||
1da177e4 LT |
381 | if (state != DEV_STATE_ONLINE) |
382 | cio_disable_subchannel(sch); | |
383 | ||
384 | /* Reset device status. */ | |
385 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
386 | ||
387 | cdev->private->state = state; | |
388 | ||
9a332116 PO |
389 | switch (state) { |
390 | case DEV_STATE_BOXED: | |
139b83dd ME |
391 | CIO_MSG_EVENT(0, "Boxed device %04x on subchannel %04x\n", |
392 | cdev->private->dev_id.devno, sch->schid.sch_no); | |
76e6fb4b SO |
393 | if (cdev->online && |
394 | ccw_device_notify(cdev, CIO_BOXED) != NOTIFY_OK) | |
37de53bb | 395 | ccw_device_sched_todo(cdev, CDEV_TODO_UNREG); |
47593bfa | 396 | cdev->private->flags.donotify = 0; |
9a332116 PO |
397 | break; |
398 | case DEV_STATE_NOT_OPER: | |
626e476a SO |
399 | CIO_MSG_EVENT(0, "Device %04x gone on subchannel %04x\n", |
400 | cdev->private->dev_id.devno, sch->schid.sch_no); | |
76e6fb4b | 401 | if (ccw_device_notify(cdev, CIO_GONE) != NOTIFY_OK) |
37de53bb | 402 | ccw_device_sched_todo(cdev, CDEV_TODO_UNREG); |
6afcc775 PO |
403 | else |
404 | ccw_device_set_disconnected(cdev); | |
626e476a | 405 | cdev->private->flags.donotify = 0; |
9a332116 PO |
406 | break; |
407 | case DEV_STATE_DISCONNECTED: | |
408 | CIO_MSG_EVENT(0, "Disconnected device %04x on subchannel " | |
409 | "%04x\n", cdev->private->dev_id.devno, | |
410 | sch->schid.sch_no); | |
76e6fb4b | 411 | if (ccw_device_notify(cdev, CIO_NO_PATH) != NOTIFY_OK) |
37de53bb | 412 | ccw_device_sched_todo(cdev, CDEV_TODO_UNREG); |
9a332116 PO |
413 | else |
414 | ccw_device_set_disconnected(cdev); | |
415 | cdev->private->flags.donotify = 0; | |
416 | break; | |
417 | default: | |
418 | break; | |
626e476a | 419 | } |
1da177e4 LT |
420 | |
421 | if (cdev->private->flags.donotify) { | |
422 | cdev->private->flags.donotify = 0; | |
91c36919 | 423 | ccw_device_oper_notify(cdev); |
1da177e4 LT |
424 | } |
425 | wake_up(&cdev->private->wait_q); | |
1da177e4 LT |
426 | } |
427 | ||
1da177e4 LT |
428 | /* |
429 | * Start device recognition. | |
430 | */ | |
736b5db8 | 431 | void ccw_device_recognition(struct ccw_device *cdev) |
1da177e4 | 432 | { |
736b5db8 | 433 | struct subchannel *sch = to_subchannel(cdev->dev.parent); |
1da177e4 LT |
434 | |
435 | /* | |
436 | * We used to start here with a sense pgid to find out whether a device | |
437 | * is locked by someone else. Unfortunately, the sense pgid command | |
438 | * code has other meanings on devices predating the path grouping | |
439 | * algorithm, so we start with sense id and box the device after an | |
440 | * timeout (or if sense pgid during path verification detects the device | |
441 | * is locked, as may happen on newer devices). | |
442 | */ | |
443 | cdev->private->flags.recog_done = 0; | |
444 | cdev->private->state = DEV_STATE_SENSE_ID; | |
736b5db8 PO |
445 | if (cio_enable_subchannel(sch, (u32) (addr_t) sch)) { |
446 | ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER); | |
447 | return; | |
448 | } | |
1da177e4 | 449 | ccw_device_sense_id_start(cdev); |
1da177e4 LT |
450 | } |
451 | ||
452 | /* | |
39f5360b | 453 | * Handle events for states that use the ccw request infrastructure. |
1da177e4 | 454 | */ |
39f5360b | 455 | static void ccw_device_request_event(struct ccw_device *cdev, enum dev_event e) |
1da177e4 | 456 | { |
39f5360b PO |
457 | switch (e) { |
458 | case DEV_EVENT_NOTOPER: | |
459 | ccw_request_notoper(cdev); | |
1da177e4 | 460 | break; |
39f5360b PO |
461 | case DEV_EVENT_INTERRUPT: |
462 | ccw_request_handler(cdev); | |
463 | break; | |
464 | case DEV_EVENT_TIMEOUT: | |
465 | ccw_request_timeout(cdev); | |
1da177e4 LT |
466 | break; |
467 | default: | |
39f5360b | 468 | break; |
1da177e4 LT |
469 | } |
470 | } | |
471 | ||
585b954e SO |
472 | static void ccw_device_report_path_events(struct ccw_device *cdev) |
473 | { | |
474 | struct subchannel *sch = to_subchannel(cdev->dev.parent); | |
475 | int path_event[8]; | |
476 | int chp, mask; | |
477 | ||
478 | for (chp = 0, mask = 0x80; chp < 8; chp++, mask >>= 1) { | |
479 | path_event[chp] = PE_NONE; | |
480 | if (mask & cdev->private->path_gone_mask & ~(sch->vpm)) | |
481 | path_event[chp] |= PE_PATH_GONE; | |
482 | if (mask & cdev->private->path_new_mask & sch->vpm) | |
483 | path_event[chp] |= PE_PATH_AVAILABLE; | |
484 | if (mask & cdev->private->pgid_reset_mask & sch->vpm) | |
485 | path_event[chp] |= PE_PATHGROUP_ESTABLISHED; | |
486 | } | |
487 | if (cdev->online && cdev->drv->path_event) | |
488 | cdev->drv->path_event(cdev, path_event); | |
489 | } | |
490 | ||
491 | static void ccw_device_reset_path_events(struct ccw_device *cdev) | |
492 | { | |
493 | cdev->private->path_gone_mask = 0; | |
494 | cdev->private->path_new_mask = 0; | |
495 | cdev->private->pgid_reset_mask = 0; | |
496 | } | |
497 | ||
1da177e4 LT |
498 | void |
499 | ccw_device_verify_done(struct ccw_device *cdev, int err) | |
500 | { | |
28bdc6f6 PO |
501 | struct subchannel *sch; |
502 | ||
503 | sch = to_subchannel(cdev->dev.parent); | |
504 | /* Update schib - pom may have changed. */ | |
cdb912a4 | 505 | if (cio_update_schib(sch)) { |
7c4d964f PO |
506 | err = -ENODEV; |
507 | goto callback; | |
cdb912a4 | 508 | } |
28bdc6f6 PO |
509 | /* Update lpm with verified path mask. */ |
510 | sch->lpm = sch->vpm; | |
511 | /* Repeat path verification? */ | |
512 | if (cdev->private->flags.doverify) { | |
28bdc6f6 PO |
513 | ccw_device_verify_start(cdev); |
514 | return; | |
515 | } | |
7c4d964f | 516 | callback: |
1da177e4 | 517 | switch (err) { |
1da177e4 LT |
518 | case 0: |
519 | ccw_device_done(cdev, DEV_STATE_ONLINE); | |
520 | /* Deliver fake irb to device driver, if needed. */ | |
521 | if (cdev->private->flags.fake_irb) { | |
522 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
23d805b6 PO |
523 | cdev->private->irb.scsw.cmd.cc = 1; |
524 | cdev->private->irb.scsw.cmd.fctl = SCSW_FCTL_START_FUNC; | |
525 | cdev->private->irb.scsw.cmd.actl = SCSW_ACTL_START_PEND; | |
526 | cdev->private->irb.scsw.cmd.stctl = | |
527 | SCSW_STCTL_STATUS_PEND; | |
1da177e4 LT |
528 | cdev->private->flags.fake_irb = 0; |
529 | if (cdev->handler) | |
530 | cdev->handler(cdev, cdev->private->intparm, | |
531 | &cdev->private->irb); | |
532 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
533 | } | |
585b954e | 534 | ccw_device_report_path_events(cdev); |
1da177e4 LT |
535 | break; |
536 | case -ETIME: | |
52ef0608 | 537 | case -EUSERS: |
8b42f5c2 PO |
538 | /* Reset oper notify indication after verify error. */ |
539 | cdev->private->flags.donotify = 0; | |
1da177e4 LT |
540 | ccw_device_done(cdev, DEV_STATE_BOXED); |
541 | break; | |
7c4d964f PO |
542 | case -EACCES: |
543 | /* Reset oper notify indication after verify error. */ | |
544 | cdev->private->flags.donotify = 0; | |
545 | ccw_device_done(cdev, DEV_STATE_DISCONNECTED); | |
546 | break; | |
1da177e4 | 547 | default: |
8b42f5c2 PO |
548 | /* Reset oper notify indication after verify error. */ |
549 | cdev->private->flags.donotify = 0; | |
7c4d964f | 550 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); |
1da177e4 LT |
551 | break; |
552 | } | |
585b954e | 553 | ccw_device_reset_path_events(cdev); |
1da177e4 LT |
554 | } |
555 | ||
556 | /* | |
557 | * Get device online. | |
558 | */ | |
559 | int | |
560 | ccw_device_online(struct ccw_device *cdev) | |
561 | { | |
562 | struct subchannel *sch; | |
563 | int ret; | |
564 | ||
565 | if ((cdev->private->state != DEV_STATE_OFFLINE) && | |
566 | (cdev->private->state != DEV_STATE_BOXED)) | |
567 | return -EINVAL; | |
568 | sch = to_subchannel(cdev->dev.parent); | |
edf22096 | 569 | ret = cio_enable_subchannel(sch, (u32)(addr_t)sch); |
1da177e4 LT |
570 | if (ret != 0) { |
571 | /* Couldn't enable the subchannel for i/o. Sick device. */ | |
572 | if (ret == -ENODEV) | |
573 | dev_fsm_event(cdev, DEV_EVENT_NOTOPER); | |
574 | return ret; | |
575 | } | |
52ef0608 PO |
576 | /* Start initial path verification. */ |
577 | cdev->private->state = DEV_STATE_VERIFY; | |
578 | ccw_device_verify_start(cdev); | |
1da177e4 LT |
579 | return 0; |
580 | } | |
581 | ||
582 | void | |
583 | ccw_device_disband_done(struct ccw_device *cdev, int err) | |
584 | { | |
585 | switch (err) { | |
586 | case 0: | |
587 | ccw_device_done(cdev, DEV_STATE_OFFLINE); | |
588 | break; | |
589 | case -ETIME: | |
590 | ccw_device_done(cdev, DEV_STATE_BOXED); | |
591 | break; | |
592 | default: | |
3ecb0a5a | 593 | cdev->private->flags.donotify = 0; |
1da177e4 LT |
594 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); |
595 | break; | |
596 | } | |
597 | } | |
598 | ||
599 | /* | |
600 | * Shutdown device. | |
601 | */ | |
602 | int | |
603 | ccw_device_offline(struct ccw_device *cdev) | |
604 | { | |
605 | struct subchannel *sch; | |
606 | ||
b301ea8c PO |
607 | /* Allow ccw_device_offline while disconnected. */ |
608 | if (cdev->private->state == DEV_STATE_DISCONNECTED || | |
609 | cdev->private->state == DEV_STATE_NOT_OPER) { | |
610 | cdev->private->flags.donotify = 0; | |
611 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); | |
612 | return 0; | |
613 | } | |
102e835d PO |
614 | if (cdev->private->state == DEV_STATE_BOXED) { |
615 | ccw_device_done(cdev, DEV_STATE_BOXED); | |
616 | return 0; | |
617 | } | |
d7b5a4c9 CH |
618 | if (ccw_device_is_orphan(cdev)) { |
619 | ccw_device_done(cdev, DEV_STATE_OFFLINE); | |
620 | return 0; | |
621 | } | |
1da177e4 | 622 | sch = to_subchannel(cdev->dev.parent); |
cdb912a4 | 623 | if (cio_update_schib(sch)) |
1da177e4 | 624 | return -ENODEV; |
23d805b6 | 625 | if (scsw_actl(&sch->schib.scsw) != 0) |
1da177e4 | 626 | return -EBUSY; |
23d805b6 PO |
627 | if (cdev->private->state != DEV_STATE_ONLINE) |
628 | return -EINVAL; | |
1da177e4 | 629 | /* Are we doing path grouping? */ |
454e1fa1 | 630 | if (!cdev->private->flags.pgroup) { |
1da177e4 LT |
631 | /* No, set state offline immediately. */ |
632 | ccw_device_done(cdev, DEV_STATE_OFFLINE); | |
633 | return 0; | |
634 | } | |
635 | /* Start Set Path Group commands. */ | |
636 | cdev->private->state = DEV_STATE_DISBAND_PGID; | |
637 | ccw_device_disband_start(cdev); | |
638 | return 0; | |
639 | } | |
640 | ||
1da177e4 | 641 | /* |
3f4cf6e7 | 642 | * Handle not operational event in non-special state. |
1da177e4 | 643 | */ |
3f4cf6e7 CH |
644 | static void ccw_device_generic_notoper(struct ccw_device *cdev, |
645 | enum dev_event dev_event) | |
1da177e4 | 646 | { |
76e6fb4b | 647 | if (ccw_device_notify(cdev, CIO_GONE) != NOTIFY_OK) |
37de53bb | 648 | ccw_device_sched_todo(cdev, CDEV_TODO_UNREG); |
6afcc775 PO |
649 | else |
650 | ccw_device_set_disconnected(cdev); | |
1da177e4 LT |
651 | } |
652 | ||
1f1148c8 PO |
653 | /* |
654 | * Handle path verification event in offline state. | |
655 | */ | |
656 | static void ccw_device_offline_verify(struct ccw_device *cdev, | |
657 | enum dev_event dev_event) | |
658 | { | |
659 | struct subchannel *sch = to_subchannel(cdev->dev.parent); | |
660 | ||
661 | css_schedule_eval(sch->schid); | |
662 | } | |
663 | ||
1da177e4 LT |
664 | /* |
665 | * Handle path verification event. | |
666 | */ | |
667 | static void | |
668 | ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event) | |
669 | { | |
670 | struct subchannel *sch; | |
671 | ||
1da177e4 LT |
672 | if (cdev->private->state == DEV_STATE_W4SENSE) { |
673 | cdev->private->flags.doverify = 1; | |
674 | return; | |
675 | } | |
676 | sch = to_subchannel(cdev->dev.parent); | |
677 | /* | |
678 | * Since we might not just be coming from an interrupt from the | |
679 | * subchannel we have to update the schib. | |
680 | */ | |
cdb912a4 SO |
681 | if (cio_update_schib(sch)) { |
682 | ccw_device_verify_done(cdev, -ENODEV); | |
683 | return; | |
684 | } | |
1da177e4 | 685 | |
23d805b6 PO |
686 | if (scsw_actl(&sch->schib.scsw) != 0 || |
687 | (scsw_stctl(&sch->schib.scsw) & SCSW_STCTL_STATUS_PEND) || | |
688 | (scsw_stctl(&cdev->private->irb.scsw) & SCSW_STCTL_STATUS_PEND)) { | |
1da177e4 LT |
689 | /* |
690 | * No final status yet or final status not yet delivered | |
25985edc | 691 | * to the device driver. Can't do path verification now, |
1da177e4 LT |
692 | * delay until final status was delivered. |
693 | */ | |
694 | cdev->private->flags.doverify = 1; | |
695 | return; | |
696 | } | |
697 | /* Device is idle, we can do the path verification. */ | |
698 | cdev->private->state = DEV_STATE_VERIFY; | |
699 | ccw_device_verify_start(cdev); | |
700 | } | |
701 | ||
d7d12ef2 PO |
702 | /* |
703 | * Handle path verification event in boxed state. | |
704 | */ | |
705 | static void ccw_device_boxed_verify(struct ccw_device *cdev, | |
706 | enum dev_event dev_event) | |
707 | { | |
708 | struct subchannel *sch = to_subchannel(cdev->dev.parent); | |
709 | ||
710 | if (cdev->online) { | |
711 | if (cio_enable_subchannel(sch, (u32) (addr_t) sch)) | |
712 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); | |
713 | else | |
714 | ccw_device_online_verify(cdev, dev_event); | |
715 | } else | |
716 | css_schedule_eval(sch->schid); | |
717 | } | |
718 | ||
1da177e4 LT |
719 | /* |
720 | * Got an interrupt for a normal io (state online). | |
721 | */ | |
722 | static void | |
723 | ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event) | |
724 | { | |
725 | struct irb *irb; | |
83262d63 | 726 | int is_cmd; |
1da177e4 | 727 | |
cbb870c8 | 728 | irb = (struct irb *)&S390_lowcore.irb; |
83262d63 | 729 | is_cmd = !scsw_is_tm(&irb->scsw); |
1da177e4 | 730 | /* Check for unsolicited interrupt. */ |
23d805b6 | 731 | if (!scsw_is_solicited(&irb->scsw)) { |
83262d63 | 732 | if (is_cmd && (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) && |
1da177e4 LT |
733 | !irb->esw.esw0.erw.cons) { |
734 | /* Unit check but no sense data. Need basic sense. */ | |
735 | if (ccw_device_do_sense(cdev, irb) != 0) | |
736 | goto call_handler_unsol; | |
e0ec5749 | 737 | memcpy(&cdev->private->irb, irb, sizeof(struct irb)); |
1da177e4 LT |
738 | cdev->private->state = DEV_STATE_W4SENSE; |
739 | cdev->private->intparm = 0; | |
740 | return; | |
741 | } | |
742 | call_handler_unsol: | |
743 | if (cdev->handler) | |
744 | cdev->handler (cdev, 0, irb); | |
18374d37 CH |
745 | if (cdev->private->flags.doverify) |
746 | ccw_device_online_verify(cdev, 0); | |
1da177e4 LT |
747 | return; |
748 | } | |
749 | /* Accumulate status and find out if a basic sense is needed. */ | |
750 | ccw_device_accumulate_irb(cdev, irb); | |
83262d63 | 751 | if (is_cmd && cdev->private->flags.dosense) { |
1da177e4 LT |
752 | if (ccw_device_do_sense(cdev, irb) == 0) { |
753 | cdev->private->state = DEV_STATE_W4SENSE; | |
754 | } | |
755 | return; | |
756 | } | |
757 | /* Call the handler. */ | |
758 | if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify) | |
759 | /* Start delayed path verification. */ | |
760 | ccw_device_online_verify(cdev, 0); | |
761 | } | |
762 | ||
763 | /* | |
764 | * Got an timeout in online state. | |
765 | */ | |
766 | static void | |
767 | ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
768 | { | |
769 | int ret; | |
770 | ||
771 | ccw_device_set_timeout(cdev, 0); | |
376ae475 | 772 | cdev->private->iretry = 255; |
1da177e4 LT |
773 | ret = ccw_device_cancel_halt_clear(cdev); |
774 | if (ret == -EBUSY) { | |
775 | ccw_device_set_timeout(cdev, 3*HZ); | |
776 | cdev->private->state = DEV_STATE_TIMEOUT_KILL; | |
777 | return; | |
778 | } | |
376ae475 | 779 | if (ret) |
3f4cf6e7 CH |
780 | dev_fsm_event(cdev, DEV_EVENT_NOTOPER); |
781 | else if (cdev->handler) | |
1da177e4 LT |
782 | cdev->handler(cdev, cdev->private->intparm, |
783 | ERR_PTR(-ETIMEDOUT)); | |
784 | } | |
785 | ||
786 | /* | |
787 | * Got an interrupt for a basic sense. | |
788 | */ | |
2b67fc46 | 789 | static void |
1da177e4 LT |
790 | ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event) |
791 | { | |
792 | struct irb *irb; | |
793 | ||
cbb870c8 | 794 | irb = (struct irb *)&S390_lowcore.irb; |
1da177e4 | 795 | /* Check for unsolicited interrupt. */ |
23d805b6 PO |
796 | if (scsw_stctl(&irb->scsw) == |
797 | (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) { | |
798 | if (scsw_cc(&irb->scsw) == 1) | |
1da177e4 LT |
799 | /* Basic sense hasn't started. Try again. */ |
800 | ccw_device_do_sense(cdev, irb); | |
801 | else { | |
139b83dd | 802 | CIO_MSG_EVENT(0, "0.%x.%04x: unsolicited " |
e556bbbd CH |
803 | "interrupt during w4sense...\n", |
804 | cdev->private->dev_id.ssid, | |
805 | cdev->private->dev_id.devno); | |
1da177e4 LT |
806 | if (cdev->handler) |
807 | cdev->handler (cdev, 0, irb); | |
808 | } | |
809 | return; | |
810 | } | |
3ba1998e CH |
811 | /* |
812 | * Check if a halt or clear has been issued in the meanwhile. If yes, | |
813 | * only deliver the halt/clear interrupt to the device driver as if it | |
814 | * had killed the original request. | |
815 | */ | |
23d805b6 PO |
816 | if (scsw_fctl(&irb->scsw) & |
817 | (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) { | |
3ba1998e CH |
818 | cdev->private->flags.dosense = 0; |
819 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
820 | ccw_device_accumulate_irb(cdev, irb); | |
821 | goto call_handler; | |
822 | } | |
1da177e4 LT |
823 | /* Add basic sense info to irb. */ |
824 | ccw_device_accumulate_basic_sense(cdev, irb); | |
825 | if (cdev->private->flags.dosense) { | |
826 | /* Another basic sense is needed. */ | |
827 | ccw_device_do_sense(cdev, irb); | |
828 | return; | |
829 | } | |
3ba1998e | 830 | call_handler: |
1da177e4 | 831 | cdev->private->state = DEV_STATE_ONLINE; |
217ee6c6 ME |
832 | /* In case sensing interfered with setting the device online */ |
833 | wake_up(&cdev->private->wait_q); | |
1da177e4 LT |
834 | /* Call the handler. */ |
835 | if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify) | |
836 | /* Start delayed path verification. */ | |
837 | ccw_device_online_verify(cdev, 0); | |
838 | } | |
839 | ||
1da177e4 LT |
840 | static void |
841 | ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event) | |
842 | { | |
843 | struct subchannel *sch; | |
844 | ||
845 | sch = to_subchannel(cdev->dev.parent); | |
846 | ccw_device_set_timeout(cdev, 0); | |
7c8427c3 CH |
847 | /* Start delayed path verification. */ |
848 | ccw_device_online_verify(cdev, 0); | |
1da177e4 | 849 | /* OK, i/o is dead now. Call interrupt handler. */ |
1da177e4 LT |
850 | if (cdev->handler) |
851 | cdev->handler(cdev, cdev->private->intparm, | |
e7769b48 | 852 | ERR_PTR(-EIO)); |
1da177e4 LT |
853 | } |
854 | ||
855 | static void | |
856 | ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
857 | { | |
858 | int ret; | |
859 | ||
860 | ret = ccw_device_cancel_halt_clear(cdev); | |
861 | if (ret == -EBUSY) { | |
862 | ccw_device_set_timeout(cdev, 3*HZ); | |
863 | return; | |
864 | } | |
7c8427c3 CH |
865 | /* Start delayed path verification. */ |
866 | ccw_device_online_verify(cdev, 0); | |
1da177e4 LT |
867 | if (cdev->handler) |
868 | cdev->handler(cdev, cdev->private->intparm, | |
e7769b48 | 869 | ERR_PTR(-EIO)); |
1da177e4 LT |
870 | } |
871 | ||
c820de39 | 872 | void ccw_device_kill_io(struct ccw_device *cdev) |
1da177e4 LT |
873 | { |
874 | int ret; | |
1da177e4 | 875 | |
376ae475 | 876 | cdev->private->iretry = 255; |
1da177e4 LT |
877 | ret = ccw_device_cancel_halt_clear(cdev); |
878 | if (ret == -EBUSY) { | |
879 | ccw_device_set_timeout(cdev, 3*HZ); | |
880 | cdev->private->state = DEV_STATE_TIMEOUT_KILL; | |
881 | return; | |
882 | } | |
7c8427c3 CH |
883 | /* Start delayed path verification. */ |
884 | ccw_device_online_verify(cdev, 0); | |
1da177e4 LT |
885 | if (cdev->handler) |
886 | cdev->handler(cdev, cdev->private->intparm, | |
e7769b48 | 887 | ERR_PTR(-EIO)); |
1da177e4 LT |
888 | } |
889 | ||
890 | static void | |
28bdc6f6 | 891 | ccw_device_delay_verify(struct ccw_device *cdev, enum dev_event dev_event) |
1da177e4 | 892 | { |
28bdc6f6 | 893 | /* Start verification after current task finished. */ |
7e560814 | 894 | cdev->private->flags.doverify = 1; |
1da177e4 LT |
895 | } |
896 | ||
1da177e4 LT |
897 | static void |
898 | ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event) | |
899 | { | |
900 | struct subchannel *sch; | |
901 | ||
902 | sch = to_subchannel(cdev->dev.parent); | |
edf22096 | 903 | if (cio_enable_subchannel(sch, (u32)(addr_t)sch) != 0) |
1da177e4 LT |
904 | /* Couldn't enable the subchannel for i/o. Sick device. */ |
905 | return; | |
1da177e4 LT |
906 | cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID; |
907 | ccw_device_sense_id_start(cdev); | |
908 | } | |
909 | ||
c820de39 | 910 | void ccw_device_trigger_reprobe(struct ccw_device *cdev) |
1da177e4 | 911 | { |
c820de39 | 912 | struct subchannel *sch; |
1da177e4 | 913 | |
1da177e4 LT |
914 | if (cdev->private->state != DEV_STATE_DISCONNECTED) |
915 | return; | |
916 | ||
c820de39 | 917 | sch = to_subchannel(cdev->dev.parent); |
1da177e4 | 918 | /* Update some values. */ |
cdb912a4 | 919 | if (cio_update_schib(sch)) |
7674da77 | 920 | return; |
1da177e4 LT |
921 | /* |
922 | * The pim, pam, pom values may not be accurate, but they are the best | |
923 | * we have before performing device selection :/ | |
924 | */ | |
28bdc6f6 | 925 | sch->lpm = sch->schib.pmcw.pam & sch->opm; |
13952ec1 SO |
926 | /* |
927 | * Use the initial configuration since we can't be shure that the old | |
928 | * paths are valid. | |
929 | */ | |
930 | io_subchannel_init_config(sch); | |
f444cc0e SO |
931 | if (cio_commit_config(sch)) |
932 | return; | |
13952ec1 | 933 | |
1da177e4 | 934 | /* We should also udate ssd info, but this has to wait. */ |
d7b5a4c9 | 935 | /* Check if this is another device which appeared on the same sch. */ |
5d6e6b6f PO |
936 | if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) |
937 | css_schedule_eval(sch->schid); | |
938 | else | |
d7b5a4c9 | 939 | ccw_device_start_id(cdev, 0); |
1da177e4 LT |
940 | } |
941 | ||
16b9a057 PO |
942 | static void ccw_device_disabled_irq(struct ccw_device *cdev, |
943 | enum dev_event dev_event) | |
1da177e4 LT |
944 | { |
945 | struct subchannel *sch; | |
946 | ||
947 | sch = to_subchannel(cdev->dev.parent); | |
948 | /* | |
16b9a057 | 949 | * An interrupt in a disabled state means a previous disable was not |
ed04b892 | 950 | * successful - should not happen, but we try to disable again. |
1da177e4 LT |
951 | */ |
952 | cio_disable_subchannel(sch); | |
953 | } | |
954 | ||
955 | static void | |
956 | ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event) | |
957 | { | |
958 | retry_set_schib(cdev); | |
959 | cdev->private->state = DEV_STATE_ONLINE; | |
960 | dev_fsm_event(cdev, dev_event); | |
961 | } | |
962 | ||
94bb0633 CH |
963 | static void ccw_device_update_cmfblock(struct ccw_device *cdev, |
964 | enum dev_event dev_event) | |
965 | { | |
966 | cmf_retry_copy_block(cdev); | |
967 | cdev->private->state = DEV_STATE_ONLINE; | |
968 | dev_fsm_event(cdev, dev_event); | |
969 | } | |
1da177e4 LT |
970 | |
971 | static void | |
972 | ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event) | |
973 | { | |
974 | ccw_device_set_timeout(cdev, 0); | |
56e6b796 | 975 | cdev->private->state = DEV_STATE_NOT_OPER; |
1da177e4 LT |
976 | wake_up(&cdev->private->wait_q); |
977 | } | |
978 | ||
979 | static void | |
980 | ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
981 | { | |
982 | int ret; | |
983 | ||
984 | ret = ccw_device_cancel_halt_clear(cdev); | |
56e6b796 SO |
985 | if (ret == -EBUSY) { |
986 | ccw_device_set_timeout(cdev, HZ/10); | |
987 | } else { | |
1da177e4 LT |
988 | cdev->private->state = DEV_STATE_NOT_OPER; |
989 | wake_up(&cdev->private->wait_q); | |
1da177e4 LT |
990 | } |
991 | } | |
992 | ||
993 | /* | |
994 | * No operation action. This is used e.g. to ignore a timeout event in | |
995 | * state offline. | |
996 | */ | |
997 | static void | |
998 | ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event) | |
999 | { | |
1000 | } | |
1001 | ||
1da177e4 LT |
1002 | /* |
1003 | * device statemachine | |
1004 | */ | |
1005 | fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = { | |
1006 | [DEV_STATE_NOT_OPER] = { | |
1007 | [DEV_EVENT_NOTOPER] = ccw_device_nop, | |
16b9a057 | 1008 | [DEV_EVENT_INTERRUPT] = ccw_device_disabled_irq, |
1da177e4 LT |
1009 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, |
1010 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1011 | }, | |
1012 | [DEV_STATE_SENSE_PGID] = { | |
9679baaf PO |
1013 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
1014 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, | |
1015 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, | |
1da177e4 LT |
1016 | [DEV_EVENT_VERIFY] = ccw_device_nop, |
1017 | }, | |
1018 | [DEV_STATE_SENSE_ID] = { | |
39f5360b PO |
1019 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
1020 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, | |
1021 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, | |
1da177e4 LT |
1022 | [DEV_EVENT_VERIFY] = ccw_device_nop, |
1023 | }, | |
1024 | [DEV_STATE_OFFLINE] = { | |
3f4cf6e7 | 1025 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
16b9a057 | 1026 | [DEV_EVENT_INTERRUPT] = ccw_device_disabled_irq, |
1da177e4 | 1027 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, |
1f1148c8 | 1028 | [DEV_EVENT_VERIFY] = ccw_device_offline_verify, |
1da177e4 LT |
1029 | }, |
1030 | [DEV_STATE_VERIFY] = { | |
9679baaf PO |
1031 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
1032 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, | |
1033 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, | |
28bdc6f6 | 1034 | [DEV_EVENT_VERIFY] = ccw_device_delay_verify, |
1da177e4 LT |
1035 | }, |
1036 | [DEV_STATE_ONLINE] = { | |
3f4cf6e7 | 1037 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
1da177e4 LT |
1038 | [DEV_EVENT_INTERRUPT] = ccw_device_irq, |
1039 | [DEV_EVENT_TIMEOUT] = ccw_device_online_timeout, | |
1040 | [DEV_EVENT_VERIFY] = ccw_device_online_verify, | |
1041 | }, | |
1042 | [DEV_STATE_W4SENSE] = { | |
3f4cf6e7 | 1043 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
1da177e4 LT |
1044 | [DEV_EVENT_INTERRUPT] = ccw_device_w4sense, |
1045 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, | |
1046 | [DEV_EVENT_VERIFY] = ccw_device_online_verify, | |
1047 | }, | |
1048 | [DEV_STATE_DISBAND_PGID] = { | |
9679baaf PO |
1049 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
1050 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, | |
1051 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, | |
1da177e4 LT |
1052 | [DEV_EVENT_VERIFY] = ccw_device_nop, |
1053 | }, | |
1054 | [DEV_STATE_BOXED] = { | |
3f4cf6e7 | 1055 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
d7d12ef2 PO |
1056 | [DEV_EVENT_INTERRUPT] = ccw_device_nop, |
1057 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, | |
1058 | [DEV_EVENT_VERIFY] = ccw_device_boxed_verify, | |
1da177e4 LT |
1059 | }, |
1060 | /* states to wait for i/o completion before doing something */ | |
1da177e4 | 1061 | [DEV_STATE_TIMEOUT_KILL] = { |
3f4cf6e7 | 1062 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
1da177e4 LT |
1063 | [DEV_EVENT_INTERRUPT] = ccw_device_killing_irq, |
1064 | [DEV_EVENT_TIMEOUT] = ccw_device_killing_timeout, | |
1065 | [DEV_EVENT_VERIFY] = ccw_device_nop, //FIXME | |
1066 | }, | |
1da177e4 LT |
1067 | [DEV_STATE_QUIESCE] = { |
1068 | [DEV_EVENT_NOTOPER] = ccw_device_quiesce_done, | |
1069 | [DEV_EVENT_INTERRUPT] = ccw_device_quiesce_done, | |
1070 | [DEV_EVENT_TIMEOUT] = ccw_device_quiesce_timeout, | |
1071 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1072 | }, | |
1073 | /* special states for devices gone not operational */ | |
1074 | [DEV_STATE_DISCONNECTED] = { | |
1075 | [DEV_EVENT_NOTOPER] = ccw_device_nop, | |
1076 | [DEV_EVENT_INTERRUPT] = ccw_device_start_id, | |
16b9a057 | 1077 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, |
28bdc6f6 | 1078 | [DEV_EVENT_VERIFY] = ccw_device_start_id, |
1da177e4 LT |
1079 | }, |
1080 | [DEV_STATE_DISCONNECTED_SENSE_ID] = { | |
39f5360b PO |
1081 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
1082 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, | |
1083 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, | |
1da177e4 LT |
1084 | [DEV_EVENT_VERIFY] = ccw_device_nop, |
1085 | }, | |
1086 | [DEV_STATE_CMFCHANGE] = { | |
1087 | [DEV_EVENT_NOTOPER] = ccw_device_change_cmfstate, | |
1088 | [DEV_EVENT_INTERRUPT] = ccw_device_change_cmfstate, | |
1089 | [DEV_EVENT_TIMEOUT] = ccw_device_change_cmfstate, | |
1090 | [DEV_EVENT_VERIFY] = ccw_device_change_cmfstate, | |
1091 | }, | |
94bb0633 CH |
1092 | [DEV_STATE_CMFUPDATE] = { |
1093 | [DEV_EVENT_NOTOPER] = ccw_device_update_cmfblock, | |
1094 | [DEV_EVENT_INTERRUPT] = ccw_device_update_cmfblock, | |
1095 | [DEV_EVENT_TIMEOUT] = ccw_device_update_cmfblock, | |
1096 | [DEV_EVENT_VERIFY] = ccw_device_update_cmfblock, | |
1097 | }, | |
d7d12ef2 PO |
1098 | [DEV_STATE_STEAL_LOCK] = { |
1099 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, | |
1100 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, | |
1101 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, | |
1102 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1103 | }, | |
1da177e4 LT |
1104 | }; |
1105 | ||
1da177e4 | 1106 | EXPORT_SYMBOL_GPL(ccw_device_set_timeout); |