Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * finite state machine for device handling |
3 | * | |
a53c8fab | 4 | * Copyright IBM Corp. 2002, 2008 |
4ce3b30c | 5 | * Author(s): Cornelia Huck (cornelia.huck@de.ibm.com) |
1da177e4 LT |
6 | * Martin Schwidefsky (schwidefsky@de.ibm.com) |
7 | */ | |
8 | ||
9 | #include <linux/module.h> | |
1da177e4 | 10 | #include <linux/init.h> |
4e57b681 TS |
11 | #include <linux/jiffies.h> |
12 | #include <linux/string.h> | |
1da177e4 LT |
13 | |
14 | #include <asm/ccwdev.h> | |
4c24da79 | 15 | #include <asm/cio.h> |
e5854a58 | 16 | #include <asm/chpid.h> |
1da177e4 LT |
17 | |
18 | #include "cio.h" | |
19 | #include "cio_debug.h" | |
20 | #include "css.h" | |
21 | #include "device.h" | |
22 | #include "chsc.h" | |
23 | #include "ioasm.h" | |
e6b6e10a | 24 | #include "chp.h" |
1da177e4 | 25 | |
14ff56bb SO |
26 | static int timeout_log_enabled; |
27 | ||
14ff56bb SO |
28 | static int __init ccw_timeout_log_setup(char *unused) |
29 | { | |
30 | timeout_log_enabled = 1; | |
31 | return 1; | |
32 | } | |
33 | ||
34 | __setup("ccw_timeout_log", ccw_timeout_log_setup); | |
35 | ||
36 | static void ccw_timeout_log(struct ccw_device *cdev) | |
37 | { | |
38 | struct schib schib; | |
39 | struct subchannel *sch; | |
cd6b4f27 | 40 | struct io_subchannel_private *private; |
83262d63 | 41 | union orb *orb; |
14ff56bb SO |
42 | int cc; |
43 | ||
44 | sch = to_subchannel(cdev->dev.parent); | |
cd6b4f27 | 45 | private = to_io_private(sch); |
83262d63 | 46 | orb = &private->orb; |
62e65da9 | 47 | cc = stsch(sch->schid, &schib); |
14ff56bb SO |
48 | |
49 | printk(KERN_WARNING "cio: ccw device timeout occurred at %llx, " | |
1aae0560 | 50 | "device information:\n", get_tod_clock()); |
14ff56bb SO |
51 | printk(KERN_WARNING "cio: orb:\n"); |
52 | print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, | |
83262d63 | 53 | orb, sizeof(*orb), 0); |
2a0217d5 KS |
54 | printk(KERN_WARNING "cio: ccw device bus id: %s\n", |
55 | dev_name(&cdev->dev)); | |
56 | printk(KERN_WARNING "cio: subchannel bus id: %s\n", | |
57 | dev_name(&sch->dev)); | |
14ff56bb SO |
58 | printk(KERN_WARNING "cio: subchannel lpm: %02x, opm: %02x, " |
59 | "vpm: %02x\n", sch->lpm, sch->opm, sch->vpm); | |
60 | ||
83262d63 PO |
61 | if (orb->tm.b) { |
62 | printk(KERN_WARNING "cio: orb indicates transport mode\n"); | |
63 | printk(KERN_WARNING "cio: last tcw:\n"); | |
64 | print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, | |
65 | (void *)(addr_t)orb->tm.tcw, | |
66 | sizeof(struct tcw), 0); | |
67 | } else { | |
68 | printk(KERN_WARNING "cio: orb indicates command mode\n"); | |
69 | if ((void *)(addr_t)orb->cmd.cpa == &private->sense_ccw || | |
70 | (void *)(addr_t)orb->cmd.cpa == cdev->private->iccws) | |
71 | printk(KERN_WARNING "cio: last channel program " | |
72 | "(intern):\n"); | |
73 | else | |
74 | printk(KERN_WARNING "cio: last channel program:\n"); | |
75 | ||
76 | print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, | |
77 | (void *)(addr_t)orb->cmd.cpa, | |
78 | sizeof(struct ccw1), 0); | |
79 | } | |
14ff56bb SO |
80 | printk(KERN_WARNING "cio: ccw device state: %d\n", |
81 | cdev->private->state); | |
82 | printk(KERN_WARNING "cio: store subchannel returned: cc=%d\n", cc); | |
83 | printk(KERN_WARNING "cio: schib:\n"); | |
84 | print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, | |
85 | &schib, sizeof(schib), 0); | |
86 | printk(KERN_WARNING "cio: ccw device flags:\n"); | |
87 | print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1, | |
88 | &cdev->private->flags, sizeof(cdev->private->flags), 0); | |
89 | } | |
90 | ||
1da177e4 LT |
91 | /* |
92 | * Timeout function. It just triggers a DEV_EVENT_TIMEOUT. | |
93 | */ | |
94 | static void | |
95 | ccw_device_timeout(unsigned long data) | |
96 | { | |
97 | struct ccw_device *cdev; | |
98 | ||
99 | cdev = (struct ccw_device *) data; | |
100 | spin_lock_irq(cdev->ccwlock); | |
14ff56bb SO |
101 | if (timeout_log_enabled) |
102 | ccw_timeout_log(cdev); | |
1da177e4 LT |
103 | dev_fsm_event(cdev, DEV_EVENT_TIMEOUT); |
104 | spin_unlock_irq(cdev->ccwlock); | |
105 | } | |
106 | ||
107 | /* | |
108 | * Set timeout | |
109 | */ | |
110 | void | |
111 | ccw_device_set_timeout(struct ccw_device *cdev, int expires) | |
112 | { | |
113 | if (expires == 0) { | |
114 | del_timer(&cdev->private->timer); | |
115 | return; | |
116 | } | |
117 | if (timer_pending(&cdev->private->timer)) { | |
118 | if (mod_timer(&cdev->private->timer, jiffies + expires)) | |
119 | return; | |
120 | } | |
121 | cdev->private->timer.function = ccw_device_timeout; | |
122 | cdev->private->timer.data = (unsigned long) cdev; | |
123 | cdev->private->timer.expires = jiffies + expires; | |
124 | add_timer(&cdev->private->timer); | |
125 | } | |
126 | ||
1da177e4 LT |
127 | int |
128 | ccw_device_cancel_halt_clear(struct ccw_device *cdev) | |
129 | { | |
130 | struct subchannel *sch; | |
131 | int ret; | |
132 | ||
133 | sch = to_subchannel(cdev->dev.parent); | |
5434da4d DJS |
134 | ret = cio_cancel_halt_clear(sch, &cdev->private->iretry); |
135 | ||
136 | if (ret == -EIO) | |
137 | CIO_MSG_EVENT(0, "0.%x.%04x: could not stop I/O\n", | |
138 | cdev->private->dev_id.ssid, | |
139 | cdev->private->dev_id.devno); | |
140 | ||
141 | return ret; | |
1da177e4 LT |
142 | } |
143 | ||
823d494a | 144 | void ccw_device_update_sense_data(struct ccw_device *cdev) |
1da177e4 | 145 | { |
823d494a SO |
146 | memset(&cdev->id, 0, sizeof(cdev->id)); |
147 | cdev->id.cu_type = cdev->private->senseid.cu_type; | |
148 | cdev->id.cu_model = cdev->private->senseid.cu_model; | |
149 | cdev->id.dev_type = cdev->private->senseid.dev_type; | |
150 | cdev->id.dev_model = cdev->private->senseid.dev_model; | |
151 | } | |
1da177e4 | 152 | |
823d494a SO |
153 | int ccw_device_test_sense_data(struct ccw_device *cdev) |
154 | { | |
155 | return cdev->id.cu_type == cdev->private->senseid.cu_type && | |
156 | cdev->id.cu_model == cdev->private->senseid.cu_model && | |
157 | cdev->id.dev_type == cdev->private->senseid.dev_type && | |
158 | cdev->id.dev_model == cdev->private->senseid.dev_model; | |
1da177e4 LT |
159 | } |
160 | ||
161 | /* | |
162 | * The machine won't give us any notification by machine check if a chpid has | |
163 | * been varied online on the SE so we have to find out by magic (i. e. driving | |
164 | * the channel subsystem to device selection and updating our path masks). | |
165 | */ | |
4d284cac | 166 | static void |
1da177e4 LT |
167 | __recover_lost_chpids(struct subchannel *sch, int old_lpm) |
168 | { | |
169 | int mask, i; | |
f86635fa | 170 | struct chp_id chpid; |
1da177e4 | 171 | |
f86635fa | 172 | chp_id_init(&chpid); |
1da177e4 LT |
173 | for (i = 0; i<8; i++) { |
174 | mask = 0x80 >> i; | |
175 | if (!(sch->lpm & mask)) | |
176 | continue; | |
177 | if (old_lpm & mask) | |
178 | continue; | |
f86635fa | 179 | chpid.id = sch->schib.pmcw.chpid[i]; |
83b3370c PO |
180 | if (!chp_is_registered(chpid)) |
181 | css_schedule_eval_all(); | |
1da177e4 LT |
182 | } |
183 | } | |
184 | ||
185 | /* | |
186 | * Stop device recognition. | |
187 | */ | |
188 | static void | |
189 | ccw_device_recog_done(struct ccw_device *cdev, int state) | |
190 | { | |
191 | struct subchannel *sch; | |
823d494a | 192 | int old_lpm; |
1da177e4 LT |
193 | |
194 | sch = to_subchannel(cdev->dev.parent); | |
195 | ||
ec64333c SO |
196 | if (cio_disable_subchannel(sch)) |
197 | state = DEV_STATE_NOT_OPER; | |
1da177e4 LT |
198 | /* |
199 | * Now that we tried recognition, we have performed device selection | |
200 | * through ssch() and the path information is up to date. | |
201 | */ | |
202 | old_lpm = sch->lpm; | |
cdb912a4 | 203 | |
4ffa9234 | 204 | /* Check since device may again have become not operational. */ |
cdb912a4 | 205 | if (cio_update_schib(sch)) |
4ffa9234 | 206 | state = DEV_STATE_NOT_OPER; |
cdb912a4 SO |
207 | else |
208 | sch->lpm = sch->schib.pmcw.pam & sch->opm; | |
209 | ||
1da177e4 LT |
210 | if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) |
211 | /* Force reprobe on all chpids. */ | |
212 | old_lpm = 0; | |
213 | if (sch->lpm != old_lpm) | |
214 | __recover_lost_chpids(sch, old_lpm); | |
47593bfa SO |
215 | if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID && |
216 | (state == DEV_STATE_NOT_OPER || state == DEV_STATE_BOXED)) { | |
217 | cdev->private->flags.recog_done = 1; | |
218 | cdev->private->state = DEV_STATE_DISCONNECTED; | |
219 | wake_up(&cdev->private->wait_q); | |
220 | return; | |
1da177e4 | 221 | } |
823d494a SO |
222 | if (cdev->private->flags.resuming) { |
223 | cdev->private->state = state; | |
224 | cdev->private->flags.recog_done = 1; | |
225 | wake_up(&cdev->private->wait_q); | |
226 | return; | |
227 | } | |
1da177e4 LT |
228 | switch (state) { |
229 | case DEV_STATE_NOT_OPER: | |
1da177e4 LT |
230 | break; |
231 | case DEV_STATE_OFFLINE: | |
823d494a SO |
232 | if (!cdev->online) { |
233 | ccw_device_update_sense_data(cdev); | |
823d494a | 234 | break; |
1da177e4 | 235 | } |
823d494a SO |
236 | cdev->private->state = DEV_STATE_OFFLINE; |
237 | cdev->private->flags.recog_done = 1; | |
238 | if (ccw_device_test_sense_data(cdev)) { | |
239 | cdev->private->flags.donotify = 1; | |
240 | ccw_device_online(cdev); | |
241 | wake_up(&cdev->private->wait_q); | |
242 | } else { | |
243 | ccw_device_update_sense_data(cdev); | |
37de53bb | 244 | ccw_device_sched_todo(cdev, CDEV_TODO_REBIND); |
1da177e4 | 245 | } |
823d494a | 246 | return; |
1da177e4 | 247 | case DEV_STATE_BOXED: |
47593bfa SO |
248 | if (cdev->id.cu_type != 0) { /* device was recognized before */ |
249 | cdev->private->flags.recog_done = 1; | |
250 | cdev->private->state = DEV_STATE_BOXED; | |
251 | wake_up(&cdev->private->wait_q); | |
252 | return; | |
253 | } | |
1da177e4 LT |
254 | break; |
255 | } | |
256 | cdev->private->state = state; | |
257 | io_subchannel_recog_done(cdev); | |
156013ff | 258 | wake_up(&cdev->private->wait_q); |
1da177e4 LT |
259 | } |
260 | ||
261 | /* | |
262 | * Function called from device_id.c after sense id has completed. | |
263 | */ | |
264 | void | |
265 | ccw_device_sense_id_done(struct ccw_device *cdev, int err) | |
266 | { | |
267 | switch (err) { | |
268 | case 0: | |
269 | ccw_device_recog_done(cdev, DEV_STATE_OFFLINE); | |
270 | break; | |
271 | case -ETIME: /* Sense id stopped by timeout. */ | |
272 | ccw_device_recog_done(cdev, DEV_STATE_BOXED); | |
273 | break; | |
274 | default: | |
275 | ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER); | |
276 | break; | |
277 | } | |
278 | } | |
279 | ||
76e6fb4b SO |
280 | /** |
281 | * ccw_device_notify() - inform the device's driver about an event | |
25985edc | 282 | * @cdev: device for which an event occurred |
76e6fb4b SO |
283 | * @event: event that occurred |
284 | * | |
285 | * Returns: | |
286 | * -%EINVAL if the device is offline or has no driver. | |
287 | * -%EOPNOTSUPP if the device's driver has no notifier registered. | |
288 | * %NOTIFY_OK if the driver wants to keep the device. | |
289 | * %NOTIFY_BAD if the driver doesn't want to keep the device. | |
290 | */ | |
c820de39 CH |
291 | int ccw_device_notify(struct ccw_device *cdev, int event) |
292 | { | |
76e6fb4b SO |
293 | int ret = -EINVAL; |
294 | ||
c820de39 | 295 | if (!cdev->drv) |
76e6fb4b | 296 | goto out; |
c820de39 | 297 | if (!cdev->online) |
76e6fb4b | 298 | goto out; |
91c36919 PO |
299 | CIO_MSG_EVENT(2, "notify called for 0.%x.%04x, event=%d\n", |
300 | cdev->private->dev_id.ssid, cdev->private->dev_id.devno, | |
301 | event); | |
76e6fb4b SO |
302 | if (!cdev->drv->notify) { |
303 | ret = -EOPNOTSUPP; | |
304 | goto out; | |
305 | } | |
306 | if (cdev->drv->notify(cdev, event)) | |
307 | ret = NOTIFY_OK; | |
308 | else | |
309 | ret = NOTIFY_BAD; | |
310 | out: | |
311 | return ret; | |
c820de39 CH |
312 | } |
313 | ||
91c36919 PO |
314 | static void ccw_device_oper_notify(struct ccw_device *cdev) |
315 | { | |
585b954e SO |
316 | struct subchannel *sch = to_subchannel(cdev->dev.parent); |
317 | ||
76e6fb4b | 318 | if (ccw_device_notify(cdev, CIO_OPER) == NOTIFY_OK) { |
94bb0633 | 319 | /* Reenable channel measurements, if needed. */ |
37de53bb | 320 | ccw_device_sched_todo(cdev, CDEV_TODO_ENABLE_CMF); |
585b954e SO |
321 | /* Save indication for new paths. */ |
322 | cdev->private->path_new_mask = sch->vpm; | |
91c36919 PO |
323 | return; |
324 | } | |
325 | /* Driver doesn't want device back. */ | |
326 | ccw_device_set_notoper(cdev); | |
37de53bb | 327 | ccw_device_sched_todo(cdev, CDEV_TODO_REBIND); |
1da177e4 LT |
328 | } |
329 | ||
330 | /* | |
331 | * Finished with online/offline processing. | |
332 | */ | |
333 | static void | |
334 | ccw_device_done(struct ccw_device *cdev, int state) | |
335 | { | |
336 | struct subchannel *sch; | |
337 | ||
338 | sch = to_subchannel(cdev->dev.parent); | |
339 | ||
f1ee3281 CH |
340 | ccw_device_set_timeout(cdev, 0); |
341 | ||
1da177e4 LT |
342 | if (state != DEV_STATE_ONLINE) |
343 | cio_disable_subchannel(sch); | |
344 | ||
345 | /* Reset device status. */ | |
346 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
347 | ||
348 | cdev->private->state = state; | |
349 | ||
9a332116 PO |
350 | switch (state) { |
351 | case DEV_STATE_BOXED: | |
139b83dd ME |
352 | CIO_MSG_EVENT(0, "Boxed device %04x on subchannel %04x\n", |
353 | cdev->private->dev_id.devno, sch->schid.sch_no); | |
76e6fb4b SO |
354 | if (cdev->online && |
355 | ccw_device_notify(cdev, CIO_BOXED) != NOTIFY_OK) | |
37de53bb | 356 | ccw_device_sched_todo(cdev, CDEV_TODO_UNREG); |
47593bfa | 357 | cdev->private->flags.donotify = 0; |
9a332116 PO |
358 | break; |
359 | case DEV_STATE_NOT_OPER: | |
626e476a SO |
360 | CIO_MSG_EVENT(0, "Device %04x gone on subchannel %04x\n", |
361 | cdev->private->dev_id.devno, sch->schid.sch_no); | |
76e6fb4b | 362 | if (ccw_device_notify(cdev, CIO_GONE) != NOTIFY_OK) |
37de53bb | 363 | ccw_device_sched_todo(cdev, CDEV_TODO_UNREG); |
6afcc775 PO |
364 | else |
365 | ccw_device_set_disconnected(cdev); | |
626e476a | 366 | cdev->private->flags.donotify = 0; |
9a332116 PO |
367 | break; |
368 | case DEV_STATE_DISCONNECTED: | |
369 | CIO_MSG_EVENT(0, "Disconnected device %04x on subchannel " | |
370 | "%04x\n", cdev->private->dev_id.devno, | |
371 | sch->schid.sch_no); | |
9bf05098 SO |
372 | if (ccw_device_notify(cdev, CIO_NO_PATH) != NOTIFY_OK) { |
373 | cdev->private->state = DEV_STATE_NOT_OPER; | |
37de53bb | 374 | ccw_device_sched_todo(cdev, CDEV_TODO_UNREG); |
9bf05098 | 375 | } else |
9a332116 PO |
376 | ccw_device_set_disconnected(cdev); |
377 | cdev->private->flags.donotify = 0; | |
378 | break; | |
379 | default: | |
380 | break; | |
626e476a | 381 | } |
1da177e4 LT |
382 | |
383 | if (cdev->private->flags.donotify) { | |
384 | cdev->private->flags.donotify = 0; | |
91c36919 | 385 | ccw_device_oper_notify(cdev); |
1da177e4 LT |
386 | } |
387 | wake_up(&cdev->private->wait_q); | |
1da177e4 LT |
388 | } |
389 | ||
1da177e4 LT |
390 | /* |
391 | * Start device recognition. | |
392 | */ | |
736b5db8 | 393 | void ccw_device_recognition(struct ccw_device *cdev) |
1da177e4 | 394 | { |
736b5db8 | 395 | struct subchannel *sch = to_subchannel(cdev->dev.parent); |
1da177e4 LT |
396 | |
397 | /* | |
398 | * We used to start here with a sense pgid to find out whether a device | |
399 | * is locked by someone else. Unfortunately, the sense pgid command | |
400 | * code has other meanings on devices predating the path grouping | |
401 | * algorithm, so we start with sense id and box the device after an | |
402 | * timeout (or if sense pgid during path verification detects the device | |
403 | * is locked, as may happen on newer devices). | |
404 | */ | |
405 | cdev->private->flags.recog_done = 0; | |
406 | cdev->private->state = DEV_STATE_SENSE_ID; | |
736b5db8 PO |
407 | if (cio_enable_subchannel(sch, (u32) (addr_t) sch)) { |
408 | ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER); | |
409 | return; | |
410 | } | |
1da177e4 | 411 | ccw_device_sense_id_start(cdev); |
1da177e4 LT |
412 | } |
413 | ||
414 | /* | |
39f5360b | 415 | * Handle events for states that use the ccw request infrastructure. |
1da177e4 | 416 | */ |
39f5360b | 417 | static void ccw_device_request_event(struct ccw_device *cdev, enum dev_event e) |
1da177e4 | 418 | { |
39f5360b PO |
419 | switch (e) { |
420 | case DEV_EVENT_NOTOPER: | |
421 | ccw_request_notoper(cdev); | |
1da177e4 | 422 | break; |
39f5360b PO |
423 | case DEV_EVENT_INTERRUPT: |
424 | ccw_request_handler(cdev); | |
425 | break; | |
426 | case DEV_EVENT_TIMEOUT: | |
427 | ccw_request_timeout(cdev); | |
1da177e4 LT |
428 | break; |
429 | default: | |
39f5360b | 430 | break; |
1da177e4 LT |
431 | } |
432 | } | |
433 | ||
585b954e SO |
434 | static void ccw_device_report_path_events(struct ccw_device *cdev) |
435 | { | |
436 | struct subchannel *sch = to_subchannel(cdev->dev.parent); | |
437 | int path_event[8]; | |
438 | int chp, mask; | |
439 | ||
440 | for (chp = 0, mask = 0x80; chp < 8; chp++, mask >>= 1) { | |
441 | path_event[chp] = PE_NONE; | |
442 | if (mask & cdev->private->path_gone_mask & ~(sch->vpm)) | |
443 | path_event[chp] |= PE_PATH_GONE; | |
444 | if (mask & cdev->private->path_new_mask & sch->vpm) | |
445 | path_event[chp] |= PE_PATH_AVAILABLE; | |
446 | if (mask & cdev->private->pgid_reset_mask & sch->vpm) | |
447 | path_event[chp] |= PE_PATHGROUP_ESTABLISHED; | |
448 | } | |
449 | if (cdev->online && cdev->drv->path_event) | |
450 | cdev->drv->path_event(cdev, path_event); | |
451 | } | |
452 | ||
453 | static void ccw_device_reset_path_events(struct ccw_device *cdev) | |
454 | { | |
455 | cdev->private->path_gone_mask = 0; | |
456 | cdev->private->path_new_mask = 0; | |
457 | cdev->private->pgid_reset_mask = 0; | |
458 | } | |
459 | ||
50c8e31f SO |
460 | static void create_fake_irb(struct irb *irb, int type) |
461 | { | |
462 | memset(irb, 0, sizeof(*irb)); | |
463 | if (type == FAKE_CMD_IRB) { | |
464 | struct cmd_scsw *scsw = &irb->scsw.cmd; | |
465 | scsw->cc = 1; | |
466 | scsw->fctl = SCSW_FCTL_START_FUNC; | |
467 | scsw->actl = SCSW_ACTL_START_PEND; | |
468 | scsw->stctl = SCSW_STCTL_STATUS_PEND; | |
469 | } else if (type == FAKE_TM_IRB) { | |
470 | struct tm_scsw *scsw = &irb->scsw.tm; | |
471 | scsw->x = 1; | |
472 | scsw->cc = 1; | |
473 | scsw->fctl = SCSW_FCTL_START_FUNC; | |
474 | scsw->actl = SCSW_ACTL_START_PEND; | |
475 | scsw->stctl = SCSW_STCTL_STATUS_PEND; | |
476 | } | |
477 | } | |
478 | ||
55fb7347 SO |
479 | static void ccw_device_handle_broken_paths(struct ccw_device *cdev) |
480 | { | |
481 | struct subchannel *sch = to_subchannel(cdev->dev.parent); | |
482 | u8 broken_paths = (sch->schib.pmcw.pam & sch->opm) ^ sch->vpm; | |
483 | ||
484 | if (broken_paths && (cdev->private->path_broken_mask != broken_paths)) | |
485 | ccw_device_schedule_recovery(); | |
486 | ||
487 | cdev->private->path_broken_mask = broken_paths; | |
488 | } | |
489 | ||
50c8e31f | 490 | void ccw_device_verify_done(struct ccw_device *cdev, int err) |
1da177e4 | 491 | { |
28bdc6f6 PO |
492 | struct subchannel *sch; |
493 | ||
494 | sch = to_subchannel(cdev->dev.parent); | |
495 | /* Update schib - pom may have changed. */ | |
cdb912a4 | 496 | if (cio_update_schib(sch)) { |
7c4d964f PO |
497 | err = -ENODEV; |
498 | goto callback; | |
cdb912a4 | 499 | } |
28bdc6f6 PO |
500 | /* Update lpm with verified path mask. */ |
501 | sch->lpm = sch->vpm; | |
502 | /* Repeat path verification? */ | |
503 | if (cdev->private->flags.doverify) { | |
28bdc6f6 PO |
504 | ccw_device_verify_start(cdev); |
505 | return; | |
506 | } | |
7c4d964f | 507 | callback: |
1da177e4 | 508 | switch (err) { |
1da177e4 LT |
509 | case 0: |
510 | ccw_device_done(cdev, DEV_STATE_ONLINE); | |
511 | /* Deliver fake irb to device driver, if needed. */ | |
512 | if (cdev->private->flags.fake_irb) { | |
50c8e31f SO |
513 | create_fake_irb(&cdev->private->irb, |
514 | cdev->private->flags.fake_irb); | |
1da177e4 LT |
515 | cdev->private->flags.fake_irb = 0; |
516 | if (cdev->handler) | |
517 | cdev->handler(cdev, cdev->private->intparm, | |
518 | &cdev->private->irb); | |
519 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
520 | } | |
585b954e | 521 | ccw_device_report_path_events(cdev); |
55fb7347 | 522 | ccw_device_handle_broken_paths(cdev); |
1da177e4 LT |
523 | break; |
524 | case -ETIME: | |
52ef0608 | 525 | case -EUSERS: |
8b42f5c2 PO |
526 | /* Reset oper notify indication after verify error. */ |
527 | cdev->private->flags.donotify = 0; | |
1da177e4 LT |
528 | ccw_device_done(cdev, DEV_STATE_BOXED); |
529 | break; | |
7c4d964f PO |
530 | case -EACCES: |
531 | /* Reset oper notify indication after verify error. */ | |
532 | cdev->private->flags.donotify = 0; | |
533 | ccw_device_done(cdev, DEV_STATE_DISCONNECTED); | |
534 | break; | |
1da177e4 | 535 | default: |
8b42f5c2 PO |
536 | /* Reset oper notify indication after verify error. */ |
537 | cdev->private->flags.donotify = 0; | |
7c4d964f | 538 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); |
1da177e4 LT |
539 | break; |
540 | } | |
585b954e | 541 | ccw_device_reset_path_events(cdev); |
1da177e4 LT |
542 | } |
543 | ||
544 | /* | |
545 | * Get device online. | |
546 | */ | |
547 | int | |
548 | ccw_device_online(struct ccw_device *cdev) | |
549 | { | |
550 | struct subchannel *sch; | |
551 | int ret; | |
552 | ||
553 | if ((cdev->private->state != DEV_STATE_OFFLINE) && | |
554 | (cdev->private->state != DEV_STATE_BOXED)) | |
555 | return -EINVAL; | |
556 | sch = to_subchannel(cdev->dev.parent); | |
edf22096 | 557 | ret = cio_enable_subchannel(sch, (u32)(addr_t)sch); |
1da177e4 LT |
558 | if (ret != 0) { |
559 | /* Couldn't enable the subchannel for i/o. Sick device. */ | |
560 | if (ret == -ENODEV) | |
561 | dev_fsm_event(cdev, DEV_EVENT_NOTOPER); | |
562 | return ret; | |
563 | } | |
52ef0608 PO |
564 | /* Start initial path verification. */ |
565 | cdev->private->state = DEV_STATE_VERIFY; | |
566 | ccw_device_verify_start(cdev); | |
1da177e4 LT |
567 | return 0; |
568 | } | |
569 | ||
570 | void | |
571 | ccw_device_disband_done(struct ccw_device *cdev, int err) | |
572 | { | |
573 | switch (err) { | |
574 | case 0: | |
575 | ccw_device_done(cdev, DEV_STATE_OFFLINE); | |
576 | break; | |
577 | case -ETIME: | |
578 | ccw_device_done(cdev, DEV_STATE_BOXED); | |
579 | break; | |
580 | default: | |
3ecb0a5a | 581 | cdev->private->flags.donotify = 0; |
1da177e4 LT |
582 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); |
583 | break; | |
584 | } | |
585 | } | |
586 | ||
587 | /* | |
588 | * Shutdown device. | |
589 | */ | |
590 | int | |
591 | ccw_device_offline(struct ccw_device *cdev) | |
592 | { | |
593 | struct subchannel *sch; | |
594 | ||
b301ea8c PO |
595 | /* Allow ccw_device_offline while disconnected. */ |
596 | if (cdev->private->state == DEV_STATE_DISCONNECTED || | |
597 | cdev->private->state == DEV_STATE_NOT_OPER) { | |
598 | cdev->private->flags.donotify = 0; | |
599 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); | |
600 | return 0; | |
601 | } | |
102e835d PO |
602 | if (cdev->private->state == DEV_STATE_BOXED) { |
603 | ccw_device_done(cdev, DEV_STATE_BOXED); | |
604 | return 0; | |
605 | } | |
d7b5a4c9 CH |
606 | if (ccw_device_is_orphan(cdev)) { |
607 | ccw_device_done(cdev, DEV_STATE_OFFLINE); | |
608 | return 0; | |
609 | } | |
1da177e4 | 610 | sch = to_subchannel(cdev->dev.parent); |
cdb912a4 | 611 | if (cio_update_schib(sch)) |
1da177e4 | 612 | return -ENODEV; |
23d805b6 | 613 | if (scsw_actl(&sch->schib.scsw) != 0) |
1da177e4 | 614 | return -EBUSY; |
23d805b6 PO |
615 | if (cdev->private->state != DEV_STATE_ONLINE) |
616 | return -EINVAL; | |
1da177e4 | 617 | /* Are we doing path grouping? */ |
454e1fa1 | 618 | if (!cdev->private->flags.pgroup) { |
1da177e4 LT |
619 | /* No, set state offline immediately. */ |
620 | ccw_device_done(cdev, DEV_STATE_OFFLINE); | |
621 | return 0; | |
622 | } | |
623 | /* Start Set Path Group commands. */ | |
624 | cdev->private->state = DEV_STATE_DISBAND_PGID; | |
625 | ccw_device_disband_start(cdev); | |
626 | return 0; | |
627 | } | |
628 | ||
1da177e4 | 629 | /* |
3f4cf6e7 | 630 | * Handle not operational event in non-special state. |
1da177e4 | 631 | */ |
3f4cf6e7 CH |
632 | static void ccw_device_generic_notoper(struct ccw_device *cdev, |
633 | enum dev_event dev_event) | |
1da177e4 | 634 | { |
76e6fb4b | 635 | if (ccw_device_notify(cdev, CIO_GONE) != NOTIFY_OK) |
37de53bb | 636 | ccw_device_sched_todo(cdev, CDEV_TODO_UNREG); |
6afcc775 PO |
637 | else |
638 | ccw_device_set_disconnected(cdev); | |
1da177e4 LT |
639 | } |
640 | ||
1f1148c8 PO |
641 | /* |
642 | * Handle path verification event in offline state. | |
643 | */ | |
644 | static void ccw_device_offline_verify(struct ccw_device *cdev, | |
645 | enum dev_event dev_event) | |
646 | { | |
647 | struct subchannel *sch = to_subchannel(cdev->dev.parent); | |
648 | ||
649 | css_schedule_eval(sch->schid); | |
650 | } | |
651 | ||
1da177e4 LT |
652 | /* |
653 | * Handle path verification event. | |
654 | */ | |
655 | static void | |
656 | ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event) | |
657 | { | |
658 | struct subchannel *sch; | |
659 | ||
1da177e4 LT |
660 | if (cdev->private->state == DEV_STATE_W4SENSE) { |
661 | cdev->private->flags.doverify = 1; | |
662 | return; | |
663 | } | |
664 | sch = to_subchannel(cdev->dev.parent); | |
665 | /* | |
666 | * Since we might not just be coming from an interrupt from the | |
667 | * subchannel we have to update the schib. | |
668 | */ | |
cdb912a4 SO |
669 | if (cio_update_schib(sch)) { |
670 | ccw_device_verify_done(cdev, -ENODEV); | |
671 | return; | |
672 | } | |
1da177e4 | 673 | |
23d805b6 PO |
674 | if (scsw_actl(&sch->schib.scsw) != 0 || |
675 | (scsw_stctl(&sch->schib.scsw) & SCSW_STCTL_STATUS_PEND) || | |
676 | (scsw_stctl(&cdev->private->irb.scsw) & SCSW_STCTL_STATUS_PEND)) { | |
1da177e4 LT |
677 | /* |
678 | * No final status yet or final status not yet delivered | |
25985edc | 679 | * to the device driver. Can't do path verification now, |
1da177e4 LT |
680 | * delay until final status was delivered. |
681 | */ | |
682 | cdev->private->flags.doverify = 1; | |
683 | return; | |
684 | } | |
685 | /* Device is idle, we can do the path verification. */ | |
686 | cdev->private->state = DEV_STATE_VERIFY; | |
687 | ccw_device_verify_start(cdev); | |
688 | } | |
689 | ||
d7d12ef2 PO |
690 | /* |
691 | * Handle path verification event in boxed state. | |
692 | */ | |
693 | static void ccw_device_boxed_verify(struct ccw_device *cdev, | |
694 | enum dev_event dev_event) | |
695 | { | |
696 | struct subchannel *sch = to_subchannel(cdev->dev.parent); | |
697 | ||
698 | if (cdev->online) { | |
699 | if (cio_enable_subchannel(sch, (u32) (addr_t) sch)) | |
700 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); | |
701 | else | |
702 | ccw_device_online_verify(cdev, dev_event); | |
703 | } else | |
704 | css_schedule_eval(sch->schid); | |
705 | } | |
706 | ||
8421d212 SO |
707 | /* |
708 | * Pass interrupt to device driver. | |
709 | */ | |
710 | static int ccw_device_call_handler(struct ccw_device *cdev) | |
711 | { | |
712 | unsigned int stctl; | |
713 | int ending_status; | |
714 | ||
715 | /* | |
716 | * we allow for the device action handler if . | |
717 | * - we received ending status | |
718 | * - the action handler requested to see all interrupts | |
719 | * - we received an intermediate status | |
720 | * - fast notification was requested (primary status) | |
721 | * - unsolicited interrupts | |
722 | */ | |
723 | stctl = scsw_stctl(&cdev->private->irb.scsw); | |
724 | ending_status = (stctl & SCSW_STCTL_SEC_STATUS) || | |
725 | (stctl == (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)) || | |
726 | (stctl == SCSW_STCTL_STATUS_PEND); | |
727 | if (!ending_status && | |
728 | !cdev->private->options.repall && | |
729 | !(stctl & SCSW_STCTL_INTER_STATUS) && | |
730 | !(cdev->private->options.fast && | |
731 | (stctl & SCSW_STCTL_PRIM_STATUS))) | |
732 | return 0; | |
733 | ||
734 | if (ending_status) | |
735 | ccw_device_set_timeout(cdev, 0); | |
736 | ||
737 | if (cdev->handler) | |
738 | cdev->handler(cdev, cdev->private->intparm, | |
739 | &cdev->private->irb); | |
740 | ||
741 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
742 | return 1; | |
743 | } | |
744 | ||
1da177e4 LT |
745 | /* |
746 | * Got an interrupt for a normal io (state online). | |
747 | */ | |
748 | static void | |
749 | ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event) | |
750 | { | |
751 | struct irb *irb; | |
83262d63 | 752 | int is_cmd; |
1da177e4 | 753 | |
0bf7fcf1 | 754 | irb = this_cpu_ptr(&cio_irb); |
83262d63 | 755 | is_cmd = !scsw_is_tm(&irb->scsw); |
1da177e4 | 756 | /* Check for unsolicited interrupt. */ |
23d805b6 | 757 | if (!scsw_is_solicited(&irb->scsw)) { |
83262d63 | 758 | if (is_cmd && (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) && |
1da177e4 LT |
759 | !irb->esw.esw0.erw.cons) { |
760 | /* Unit check but no sense data. Need basic sense. */ | |
761 | if (ccw_device_do_sense(cdev, irb) != 0) | |
762 | goto call_handler_unsol; | |
e0ec5749 | 763 | memcpy(&cdev->private->irb, irb, sizeof(struct irb)); |
1da177e4 LT |
764 | cdev->private->state = DEV_STATE_W4SENSE; |
765 | cdev->private->intparm = 0; | |
766 | return; | |
767 | } | |
768 | call_handler_unsol: | |
769 | if (cdev->handler) | |
770 | cdev->handler (cdev, 0, irb); | |
18374d37 CH |
771 | if (cdev->private->flags.doverify) |
772 | ccw_device_online_verify(cdev, 0); | |
1da177e4 LT |
773 | return; |
774 | } | |
775 | /* Accumulate status and find out if a basic sense is needed. */ | |
776 | ccw_device_accumulate_irb(cdev, irb); | |
83262d63 | 777 | if (is_cmd && cdev->private->flags.dosense) { |
1da177e4 LT |
778 | if (ccw_device_do_sense(cdev, irb) == 0) { |
779 | cdev->private->state = DEV_STATE_W4SENSE; | |
780 | } | |
781 | return; | |
782 | } | |
783 | /* Call the handler. */ | |
784 | if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify) | |
785 | /* Start delayed path verification. */ | |
786 | ccw_device_online_verify(cdev, 0); | |
787 | } | |
788 | ||
789 | /* | |
790 | * Got an timeout in online state. | |
791 | */ | |
792 | static void | |
793 | ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
794 | { | |
795 | int ret; | |
796 | ||
797 | ccw_device_set_timeout(cdev, 0); | |
376ae475 | 798 | cdev->private->iretry = 255; |
1da177e4 LT |
799 | ret = ccw_device_cancel_halt_clear(cdev); |
800 | if (ret == -EBUSY) { | |
801 | ccw_device_set_timeout(cdev, 3*HZ); | |
802 | cdev->private->state = DEV_STATE_TIMEOUT_KILL; | |
803 | return; | |
804 | } | |
376ae475 | 805 | if (ret) |
3f4cf6e7 CH |
806 | dev_fsm_event(cdev, DEV_EVENT_NOTOPER); |
807 | else if (cdev->handler) | |
1da177e4 LT |
808 | cdev->handler(cdev, cdev->private->intparm, |
809 | ERR_PTR(-ETIMEDOUT)); | |
810 | } | |
811 | ||
812 | /* | |
813 | * Got an interrupt for a basic sense. | |
814 | */ | |
2b67fc46 | 815 | static void |
1da177e4 LT |
816 | ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event) |
817 | { | |
818 | struct irb *irb; | |
819 | ||
0bf7fcf1 | 820 | irb = this_cpu_ptr(&cio_irb); |
1da177e4 | 821 | /* Check for unsolicited interrupt. */ |
23d805b6 PO |
822 | if (scsw_stctl(&irb->scsw) == |
823 | (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) { | |
824 | if (scsw_cc(&irb->scsw) == 1) | |
1da177e4 LT |
825 | /* Basic sense hasn't started. Try again. */ |
826 | ccw_device_do_sense(cdev, irb); | |
827 | else { | |
139b83dd | 828 | CIO_MSG_EVENT(0, "0.%x.%04x: unsolicited " |
e556bbbd CH |
829 | "interrupt during w4sense...\n", |
830 | cdev->private->dev_id.ssid, | |
831 | cdev->private->dev_id.devno); | |
1da177e4 LT |
832 | if (cdev->handler) |
833 | cdev->handler (cdev, 0, irb); | |
834 | } | |
835 | return; | |
836 | } | |
3ba1998e CH |
837 | /* |
838 | * Check if a halt or clear has been issued in the meanwhile. If yes, | |
839 | * only deliver the halt/clear interrupt to the device driver as if it | |
840 | * had killed the original request. | |
841 | */ | |
23d805b6 PO |
842 | if (scsw_fctl(&irb->scsw) & |
843 | (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) { | |
3ba1998e CH |
844 | cdev->private->flags.dosense = 0; |
845 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
846 | ccw_device_accumulate_irb(cdev, irb); | |
847 | goto call_handler; | |
848 | } | |
1da177e4 LT |
849 | /* Add basic sense info to irb. */ |
850 | ccw_device_accumulate_basic_sense(cdev, irb); | |
851 | if (cdev->private->flags.dosense) { | |
852 | /* Another basic sense is needed. */ | |
853 | ccw_device_do_sense(cdev, irb); | |
854 | return; | |
855 | } | |
3ba1998e | 856 | call_handler: |
1da177e4 | 857 | cdev->private->state = DEV_STATE_ONLINE; |
217ee6c6 ME |
858 | /* In case sensing interfered with setting the device online */ |
859 | wake_up(&cdev->private->wait_q); | |
1da177e4 LT |
860 | /* Call the handler. */ |
861 | if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify) | |
862 | /* Start delayed path verification. */ | |
863 | ccw_device_online_verify(cdev, 0); | |
864 | } | |
865 | ||
1da177e4 LT |
866 | static void |
867 | ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event) | |
868 | { | |
1da177e4 | 869 | ccw_device_set_timeout(cdev, 0); |
7c8427c3 CH |
870 | /* Start delayed path verification. */ |
871 | ccw_device_online_verify(cdev, 0); | |
1da177e4 | 872 | /* OK, i/o is dead now. Call interrupt handler. */ |
1da177e4 LT |
873 | if (cdev->handler) |
874 | cdev->handler(cdev, cdev->private->intparm, | |
e7769b48 | 875 | ERR_PTR(-EIO)); |
1da177e4 LT |
876 | } |
877 | ||
878 | static void | |
879 | ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
880 | { | |
881 | int ret; | |
882 | ||
883 | ret = ccw_device_cancel_halt_clear(cdev); | |
884 | if (ret == -EBUSY) { | |
885 | ccw_device_set_timeout(cdev, 3*HZ); | |
886 | return; | |
887 | } | |
7c8427c3 CH |
888 | /* Start delayed path verification. */ |
889 | ccw_device_online_verify(cdev, 0); | |
1da177e4 LT |
890 | if (cdev->handler) |
891 | cdev->handler(cdev, cdev->private->intparm, | |
e7769b48 | 892 | ERR_PTR(-EIO)); |
1da177e4 LT |
893 | } |
894 | ||
c820de39 | 895 | void ccw_device_kill_io(struct ccw_device *cdev) |
1da177e4 LT |
896 | { |
897 | int ret; | |
1da177e4 | 898 | |
376ae475 | 899 | cdev->private->iretry = 255; |
1da177e4 LT |
900 | ret = ccw_device_cancel_halt_clear(cdev); |
901 | if (ret == -EBUSY) { | |
902 | ccw_device_set_timeout(cdev, 3*HZ); | |
903 | cdev->private->state = DEV_STATE_TIMEOUT_KILL; | |
904 | return; | |
905 | } | |
7c8427c3 CH |
906 | /* Start delayed path verification. */ |
907 | ccw_device_online_verify(cdev, 0); | |
1da177e4 LT |
908 | if (cdev->handler) |
909 | cdev->handler(cdev, cdev->private->intparm, | |
e7769b48 | 910 | ERR_PTR(-EIO)); |
1da177e4 LT |
911 | } |
912 | ||
913 | static void | |
28bdc6f6 | 914 | ccw_device_delay_verify(struct ccw_device *cdev, enum dev_event dev_event) |
1da177e4 | 915 | { |
28bdc6f6 | 916 | /* Start verification after current task finished. */ |
7e560814 | 917 | cdev->private->flags.doverify = 1; |
1da177e4 LT |
918 | } |
919 | ||
1da177e4 LT |
920 | static void |
921 | ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event) | |
922 | { | |
923 | struct subchannel *sch; | |
924 | ||
925 | sch = to_subchannel(cdev->dev.parent); | |
edf22096 | 926 | if (cio_enable_subchannel(sch, (u32)(addr_t)sch) != 0) |
1da177e4 LT |
927 | /* Couldn't enable the subchannel for i/o. Sick device. */ |
928 | return; | |
1da177e4 LT |
929 | cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID; |
930 | ccw_device_sense_id_start(cdev); | |
931 | } | |
932 | ||
c820de39 | 933 | void ccw_device_trigger_reprobe(struct ccw_device *cdev) |
1da177e4 | 934 | { |
c820de39 | 935 | struct subchannel *sch; |
1da177e4 | 936 | |
1da177e4 LT |
937 | if (cdev->private->state != DEV_STATE_DISCONNECTED) |
938 | return; | |
939 | ||
c820de39 | 940 | sch = to_subchannel(cdev->dev.parent); |
1da177e4 | 941 | /* Update some values. */ |
cdb912a4 | 942 | if (cio_update_schib(sch)) |
7674da77 | 943 | return; |
1da177e4 LT |
944 | /* |
945 | * The pim, pam, pom values may not be accurate, but they are the best | |
946 | * we have before performing device selection :/ | |
947 | */ | |
28bdc6f6 | 948 | sch->lpm = sch->schib.pmcw.pam & sch->opm; |
13952ec1 SO |
949 | /* |
950 | * Use the initial configuration since we can't be shure that the old | |
951 | * paths are valid. | |
952 | */ | |
953 | io_subchannel_init_config(sch); | |
f444cc0e SO |
954 | if (cio_commit_config(sch)) |
955 | return; | |
13952ec1 | 956 | |
1da177e4 | 957 | /* We should also udate ssd info, but this has to wait. */ |
d7b5a4c9 | 958 | /* Check if this is another device which appeared on the same sch. */ |
5d6e6b6f PO |
959 | if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) |
960 | css_schedule_eval(sch->schid); | |
961 | else | |
d7b5a4c9 | 962 | ccw_device_start_id(cdev, 0); |
1da177e4 LT |
963 | } |
964 | ||
16b9a057 PO |
965 | static void ccw_device_disabled_irq(struct ccw_device *cdev, |
966 | enum dev_event dev_event) | |
1da177e4 LT |
967 | { |
968 | struct subchannel *sch; | |
969 | ||
970 | sch = to_subchannel(cdev->dev.parent); | |
971 | /* | |
16b9a057 | 972 | * An interrupt in a disabled state means a previous disable was not |
ed04b892 | 973 | * successful - should not happen, but we try to disable again. |
1da177e4 LT |
974 | */ |
975 | cio_disable_subchannel(sch); | |
976 | } | |
977 | ||
978 | static void | |
979 | ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event) | |
980 | { | |
981 | retry_set_schib(cdev); | |
982 | cdev->private->state = DEV_STATE_ONLINE; | |
983 | dev_fsm_event(cdev, dev_event); | |
984 | } | |
985 | ||
94bb0633 CH |
986 | static void ccw_device_update_cmfblock(struct ccw_device *cdev, |
987 | enum dev_event dev_event) | |
988 | { | |
989 | cmf_retry_copy_block(cdev); | |
990 | cdev->private->state = DEV_STATE_ONLINE; | |
991 | dev_fsm_event(cdev, dev_event); | |
992 | } | |
1da177e4 LT |
993 | |
994 | static void | |
995 | ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event) | |
996 | { | |
997 | ccw_device_set_timeout(cdev, 0); | |
56e6b796 | 998 | cdev->private->state = DEV_STATE_NOT_OPER; |
1da177e4 LT |
999 | wake_up(&cdev->private->wait_q); |
1000 | } | |
1001 | ||
1002 | static void | |
1003 | ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
1004 | { | |
1005 | int ret; | |
1006 | ||
1007 | ret = ccw_device_cancel_halt_clear(cdev); | |
56e6b796 SO |
1008 | if (ret == -EBUSY) { |
1009 | ccw_device_set_timeout(cdev, HZ/10); | |
1010 | } else { | |
1da177e4 LT |
1011 | cdev->private->state = DEV_STATE_NOT_OPER; |
1012 | wake_up(&cdev->private->wait_q); | |
1da177e4 LT |
1013 | } |
1014 | } | |
1015 | ||
1016 | /* | |
1017 | * No operation action. This is used e.g. to ignore a timeout event in | |
1018 | * state offline. | |
1019 | */ | |
1020 | static void | |
1021 | ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event) | |
1022 | { | |
1023 | } | |
1024 | ||
1da177e4 LT |
1025 | /* |
1026 | * device statemachine | |
1027 | */ | |
1028 | fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = { | |
1029 | [DEV_STATE_NOT_OPER] = { | |
1030 | [DEV_EVENT_NOTOPER] = ccw_device_nop, | |
16b9a057 | 1031 | [DEV_EVENT_INTERRUPT] = ccw_device_disabled_irq, |
1da177e4 LT |
1032 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, |
1033 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1034 | }, | |
1da177e4 | 1035 | [DEV_STATE_SENSE_ID] = { |
39f5360b PO |
1036 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
1037 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, | |
1038 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, | |
1da177e4 LT |
1039 | [DEV_EVENT_VERIFY] = ccw_device_nop, |
1040 | }, | |
1041 | [DEV_STATE_OFFLINE] = { | |
3f4cf6e7 | 1042 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
16b9a057 | 1043 | [DEV_EVENT_INTERRUPT] = ccw_device_disabled_irq, |
1da177e4 | 1044 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, |
1f1148c8 | 1045 | [DEV_EVENT_VERIFY] = ccw_device_offline_verify, |
1da177e4 LT |
1046 | }, |
1047 | [DEV_STATE_VERIFY] = { | |
9679baaf PO |
1048 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
1049 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, | |
1050 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, | |
28bdc6f6 | 1051 | [DEV_EVENT_VERIFY] = ccw_device_delay_verify, |
1da177e4 LT |
1052 | }, |
1053 | [DEV_STATE_ONLINE] = { | |
3f4cf6e7 | 1054 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
1da177e4 LT |
1055 | [DEV_EVENT_INTERRUPT] = ccw_device_irq, |
1056 | [DEV_EVENT_TIMEOUT] = ccw_device_online_timeout, | |
1057 | [DEV_EVENT_VERIFY] = ccw_device_online_verify, | |
1058 | }, | |
1059 | [DEV_STATE_W4SENSE] = { | |
3f4cf6e7 | 1060 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
1da177e4 LT |
1061 | [DEV_EVENT_INTERRUPT] = ccw_device_w4sense, |
1062 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, | |
1063 | [DEV_EVENT_VERIFY] = ccw_device_online_verify, | |
1064 | }, | |
1065 | [DEV_STATE_DISBAND_PGID] = { | |
9679baaf PO |
1066 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
1067 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, | |
1068 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, | |
1da177e4 LT |
1069 | [DEV_EVENT_VERIFY] = ccw_device_nop, |
1070 | }, | |
1071 | [DEV_STATE_BOXED] = { | |
3f4cf6e7 | 1072 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
d7d12ef2 PO |
1073 | [DEV_EVENT_INTERRUPT] = ccw_device_nop, |
1074 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, | |
1075 | [DEV_EVENT_VERIFY] = ccw_device_boxed_verify, | |
1da177e4 LT |
1076 | }, |
1077 | /* states to wait for i/o completion before doing something */ | |
1da177e4 | 1078 | [DEV_STATE_TIMEOUT_KILL] = { |
3f4cf6e7 | 1079 | [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, |
1da177e4 LT |
1080 | [DEV_EVENT_INTERRUPT] = ccw_device_killing_irq, |
1081 | [DEV_EVENT_TIMEOUT] = ccw_device_killing_timeout, | |
1082 | [DEV_EVENT_VERIFY] = ccw_device_nop, //FIXME | |
1083 | }, | |
1da177e4 LT |
1084 | [DEV_STATE_QUIESCE] = { |
1085 | [DEV_EVENT_NOTOPER] = ccw_device_quiesce_done, | |
1086 | [DEV_EVENT_INTERRUPT] = ccw_device_quiesce_done, | |
1087 | [DEV_EVENT_TIMEOUT] = ccw_device_quiesce_timeout, | |
1088 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1089 | }, | |
1090 | /* special states for devices gone not operational */ | |
1091 | [DEV_STATE_DISCONNECTED] = { | |
1092 | [DEV_EVENT_NOTOPER] = ccw_device_nop, | |
1093 | [DEV_EVENT_INTERRUPT] = ccw_device_start_id, | |
16b9a057 | 1094 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, |
28bdc6f6 | 1095 | [DEV_EVENT_VERIFY] = ccw_device_start_id, |
1da177e4 LT |
1096 | }, |
1097 | [DEV_STATE_DISCONNECTED_SENSE_ID] = { | |
39f5360b PO |
1098 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, |
1099 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, | |
1100 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, | |
1da177e4 LT |
1101 | [DEV_EVENT_VERIFY] = ccw_device_nop, |
1102 | }, | |
1103 | [DEV_STATE_CMFCHANGE] = { | |
1104 | [DEV_EVENT_NOTOPER] = ccw_device_change_cmfstate, | |
1105 | [DEV_EVENT_INTERRUPT] = ccw_device_change_cmfstate, | |
1106 | [DEV_EVENT_TIMEOUT] = ccw_device_change_cmfstate, | |
1107 | [DEV_EVENT_VERIFY] = ccw_device_change_cmfstate, | |
1108 | }, | |
94bb0633 CH |
1109 | [DEV_STATE_CMFUPDATE] = { |
1110 | [DEV_EVENT_NOTOPER] = ccw_device_update_cmfblock, | |
1111 | [DEV_EVENT_INTERRUPT] = ccw_device_update_cmfblock, | |
1112 | [DEV_EVENT_TIMEOUT] = ccw_device_update_cmfblock, | |
1113 | [DEV_EVENT_VERIFY] = ccw_device_update_cmfblock, | |
1114 | }, | |
d7d12ef2 PO |
1115 | [DEV_STATE_STEAL_LOCK] = { |
1116 | [DEV_EVENT_NOTOPER] = ccw_device_request_event, | |
1117 | [DEV_EVENT_INTERRUPT] = ccw_device_request_event, | |
1118 | [DEV_EVENT_TIMEOUT] = ccw_device_request_event, | |
1119 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1120 | }, | |
1da177e4 LT |
1121 | }; |
1122 | ||
1da177e4 | 1123 | EXPORT_SYMBOL_GPL(ccw_device_set_timeout); |