Lines Matching full:device
55 MODULE_DESCRIPTION("Linux on S/390 DASD device driver,"
78 * SECTION: Operations on the device structure.
86 * Allocate memory for a new device structure.
90 struct dasd_device *device; in dasd_alloc_device() local
92 device = kzalloc(sizeof(struct dasd_device), GFP_ATOMIC); in dasd_alloc_device()
93 if (!device) in dasd_alloc_device()
96 /* Get two pages for normal block device operations. */ in dasd_alloc_device()
97 device->ccw_mem = (void *) __get_free_pages(GFP_ATOMIC | GFP_DMA, 1); in dasd_alloc_device()
98 if (!device->ccw_mem) { in dasd_alloc_device()
99 kfree(device); in dasd_alloc_device()
103 device->erp_mem = (void *) get_zeroed_page(GFP_ATOMIC | GFP_DMA); in dasd_alloc_device()
104 if (!device->erp_mem) { in dasd_alloc_device()
105 free_pages((unsigned long) device->ccw_mem, 1); in dasd_alloc_device()
106 kfree(device); in dasd_alloc_device()
110 device->ese_mem = (void *)__get_free_pages(GFP_ATOMIC | GFP_DMA, 1); in dasd_alloc_device()
111 if (!device->ese_mem) { in dasd_alloc_device()
112 free_page((unsigned long) device->erp_mem); in dasd_alloc_device()
113 free_pages((unsigned long) device->ccw_mem, 1); in dasd_alloc_device()
114 kfree(device); in dasd_alloc_device()
118 dasd_init_chunklist(&device->ccw_chunks, device->ccw_mem, PAGE_SIZE*2); in dasd_alloc_device()
119 dasd_init_chunklist(&device->erp_chunks, device->erp_mem, PAGE_SIZE); in dasd_alloc_device()
120 dasd_init_chunklist(&device->ese_chunks, device->ese_mem, PAGE_SIZE * 2); in dasd_alloc_device()
121 spin_lock_init(&device->mem_lock); in dasd_alloc_device()
122 atomic_set(&device->tasklet_scheduled, 0); in dasd_alloc_device()
123 tasklet_init(&device->tasklet, dasd_device_tasklet, in dasd_alloc_device()
124 (unsigned long) device); in dasd_alloc_device()
125 INIT_LIST_HEAD(&device->ccw_queue); in dasd_alloc_device()
126 timer_setup(&device->timer, dasd_device_timeout, 0); in dasd_alloc_device()
127 INIT_WORK(&device->kick_work, do_kick_device); in dasd_alloc_device()
128 INIT_WORK(&device->reload_device, do_reload_device); in dasd_alloc_device()
129 INIT_WORK(&device->requeue_requests, do_requeue_requests); in dasd_alloc_device()
130 device->state = DASD_STATE_NEW; in dasd_alloc_device()
131 device->target = DASD_STATE_NEW; in dasd_alloc_device()
132 mutex_init(&device->state_mutex); in dasd_alloc_device()
133 spin_lock_init(&device->profile.lock); in dasd_alloc_device()
134 return device; in dasd_alloc_device()
138 * Free memory of a device structure.
140 void dasd_free_device(struct dasd_device *device) in dasd_free_device() argument
142 kfree(device->private); in dasd_free_device()
143 free_pages((unsigned long) device->ese_mem, 1); in dasd_free_device()
144 free_page((unsigned long) device->erp_mem); in dasd_free_device()
145 free_pages((unsigned long) device->ccw_mem, 1); in dasd_free_device()
146 kfree(device); in dasd_free_device()
150 * Allocate memory for a new device structure.
159 /* open_count = 0 means device online but not in use */ in dasd_alloc_block()
177 * Free memory of a device structure.
186 * Make a new device known to the system.
188 static int dasd_state_new_to_known(struct dasd_device *device) in dasd_state_new_to_known() argument
191 * As long as the device is not in state DASD_STATE_NEW we want to in dasd_state_new_to_known()
194 dasd_get_device(device); in dasd_state_new_to_known()
195 device->state = DASD_STATE_KNOWN; in dasd_state_new_to_known()
200 * Let the system forget about a device.
202 static int dasd_state_known_to_new(struct dasd_device *device) in dasd_state_known_to_new() argument
204 /* Disable extended error reporting for this device. */ in dasd_state_known_to_new()
205 dasd_eer_disable(device); in dasd_state_known_to_new()
206 device->state = DASD_STATE_NEW; in dasd_state_known_to_new()
209 dasd_put_device(device); in dasd_state_known_to_new()
227 * Request the irq line for the device.
229 static int dasd_state_known_to_basic(struct dasd_device *device) in dasd_state_known_to_basic() argument
231 struct dasd_block *block = device->block; in dasd_state_known_to_basic()
244 dasd_profile_on(&device->block->profile); in dasd_state_known_to_basic()
246 device->debugfs_dentry = in dasd_state_known_to_basic()
247 dasd_debugfs_setup(dev_name(&device->cdev->dev), in dasd_state_known_to_basic()
249 dasd_profile_init(&device->profile, device->debugfs_dentry); in dasd_state_known_to_basic()
250 dasd_hosts_init(device->debugfs_dentry, device); in dasd_state_known_to_basic()
252 /* register 'device' debug area, used for all DBF_DEV_XXX calls */ in dasd_state_known_to_basic()
253 device->debug_area = debug_register(dev_name(&device->cdev->dev), 4, 1, in dasd_state_known_to_basic()
255 debug_register_view(device->debug_area, &debug_sprintf_view); in dasd_state_known_to_basic()
256 debug_set_level(device->debug_area, DBF_WARNING); in dasd_state_known_to_basic()
257 DBF_DEV_EVENT(DBF_EMERG, device, "%s", "debug area created"); in dasd_state_known_to_basic()
259 device->state = DASD_STATE_BASIC; in dasd_state_known_to_basic()
265 * Release the irq line for the device. Terminate any running i/o.
267 static int dasd_state_basic_to_known(struct dasd_device *device) in dasd_state_basic_to_known() argument
271 if (device->discipline->basic_to_known) { in dasd_state_basic_to_known()
272 rc = device->discipline->basic_to_known(device); in dasd_state_basic_to_known()
277 if (device->block) { in dasd_state_basic_to_known()
278 dasd_profile_exit(&device->block->profile); in dasd_state_basic_to_known()
279 debugfs_remove(device->block->debugfs_dentry); in dasd_state_basic_to_known()
280 dasd_gendisk_free(device->block); in dasd_state_basic_to_known()
281 dasd_block_clear_timer(device->block); in dasd_state_basic_to_known()
283 rc = dasd_flush_device_queue(device); in dasd_state_basic_to_known()
286 dasd_device_clear_timer(device); in dasd_state_basic_to_known()
287 dasd_profile_exit(&device->profile); in dasd_state_basic_to_known()
288 dasd_hosts_exit(device); in dasd_state_basic_to_known()
289 debugfs_remove(device->debugfs_dentry); in dasd_state_basic_to_known()
290 DBF_DEV_EVENT(DBF_EMERG, device, "%p debug area deleted", device); in dasd_state_basic_to_known()
291 if (device->debug_area != NULL) { in dasd_state_basic_to_known()
292 debug_unregister(device->debug_area); in dasd_state_basic_to_known()
293 device->debug_area = NULL; in dasd_state_basic_to_known()
295 device->state = DASD_STATE_KNOWN; in dasd_state_basic_to_known()
301 * -EAGAIN in which case the device keeps the state DASD_STATE_BASIC
309 * device is setup.
310 * In case the analysis returns an error, the device setup is stopped
313 static int dasd_state_basic_to_ready(struct dasd_device *device) in dasd_state_basic_to_ready() argument
320 block = device->block; in dasd_state_basic_to_ready()
327 device->state = DASD_STATE_UNFMT; in dasd_state_basic_to_ready()
328 disk = device->block->gdp; in dasd_state_basic_to_ready()
335 if (device->discipline->setup_blk_queue) in dasd_state_basic_to_ready()
336 device->discipline->setup_blk_queue(block); in dasd_state_basic_to_ready()
339 device->state = DASD_STATE_READY; in dasd_state_basic_to_ready()
342 device->state = DASD_STATE_BASIC; in dasd_state_basic_to_ready()
346 device->state = DASD_STATE_READY; in dasd_state_basic_to_ready()
349 if (device->discipline->basic_to_ready) in dasd_state_basic_to_ready()
350 rc = device->discipline->basic_to_ready(device); in dasd_state_basic_to_ready()
355 int _wait_for_empty_queues(struct dasd_device *device) in _wait_for_empty_queues() argument
357 if (device->block) in _wait_for_empty_queues()
358 return list_empty(&device->ccw_queue) && in _wait_for_empty_queues()
359 list_empty(&device->block->ccw_queue); in _wait_for_empty_queues()
361 return list_empty(&device->ccw_queue); in _wait_for_empty_queues()
365 * Remove device from block device layer. Destroy dirty buffers.
369 static int dasd_state_ready_to_basic(struct dasd_device *device) in dasd_state_ready_to_basic() argument
373 device->state = DASD_STATE_BASIC; in dasd_state_ready_to_basic()
374 if (device->block) { in dasd_state_ready_to_basic()
375 struct dasd_block *block = device->block; in dasd_state_ready_to_basic()
378 device->state = DASD_STATE_READY; in dasd_state_ready_to_basic()
392 static int dasd_state_unfmt_to_basic(struct dasd_device *device) in dasd_state_unfmt_to_basic() argument
394 device->state = DASD_STATE_BASIC; in dasd_state_unfmt_to_basic()
399 * Make the device online and schedule the bottom half to start
404 dasd_state_ready_to_online(struct dasd_device * device) in dasd_state_ready_to_online() argument
406 device->state = DASD_STATE_ONLINE; in dasd_state_ready_to_online()
407 if (device->block) { in dasd_state_ready_to_online()
408 dasd_schedule_block_bh(device->block); in dasd_state_ready_to_online()
409 if ((device->features & DASD_FEATURE_USERAW)) { in dasd_state_ready_to_online()
410 kobject_uevent(&disk_to_dev(device->block->gdp)->kobj, in dasd_state_ready_to_online()
414 disk_uevent(device->block->bdev->bd_disk, KOBJ_CHANGE); in dasd_state_ready_to_online()
422 static int dasd_state_online_to_ready(struct dasd_device *device) in dasd_state_online_to_ready() argument
426 if (device->discipline->online_to_ready) { in dasd_state_online_to_ready()
427 rc = device->discipline->online_to_ready(device); in dasd_state_online_to_ready()
432 device->state = DASD_STATE_READY; in dasd_state_online_to_ready()
433 if (device->block && !(device->features & DASD_FEATURE_USERAW)) in dasd_state_online_to_ready()
434 disk_uevent(device->block->bdev->bd_disk, KOBJ_CHANGE); in dasd_state_online_to_ready()
439 * Device startup state changes.
441 static int dasd_increase_state(struct dasd_device *device) in dasd_increase_state() argument
446 if (device->state == DASD_STATE_NEW && in dasd_increase_state()
447 device->target >= DASD_STATE_KNOWN) in dasd_increase_state()
448 rc = dasd_state_new_to_known(device); in dasd_increase_state()
451 device->state == DASD_STATE_KNOWN && in dasd_increase_state()
452 device->target >= DASD_STATE_BASIC) in dasd_increase_state()
453 rc = dasd_state_known_to_basic(device); in dasd_increase_state()
456 device->state == DASD_STATE_BASIC && in dasd_increase_state()
457 device->target >= DASD_STATE_READY) in dasd_increase_state()
458 rc = dasd_state_basic_to_ready(device); in dasd_increase_state()
461 device->state == DASD_STATE_UNFMT && in dasd_increase_state()
462 device->target > DASD_STATE_UNFMT) in dasd_increase_state()
466 device->state == DASD_STATE_READY && in dasd_increase_state()
467 device->target >= DASD_STATE_ONLINE) in dasd_increase_state()
468 rc = dasd_state_ready_to_online(device); in dasd_increase_state()
474 * Device shutdown state changes.
476 static int dasd_decrease_state(struct dasd_device *device) in dasd_decrease_state() argument
481 if (device->state == DASD_STATE_ONLINE && in dasd_decrease_state()
482 device->target <= DASD_STATE_READY) in dasd_decrease_state()
483 rc = dasd_state_online_to_ready(device); in dasd_decrease_state()
486 device->state == DASD_STATE_READY && in dasd_decrease_state()
487 device->target <= DASD_STATE_BASIC) in dasd_decrease_state()
488 rc = dasd_state_ready_to_basic(device); in dasd_decrease_state()
491 device->state == DASD_STATE_UNFMT && in dasd_decrease_state()
492 device->target <= DASD_STATE_BASIC) in dasd_decrease_state()
493 rc = dasd_state_unfmt_to_basic(device); in dasd_decrease_state()
496 device->state == DASD_STATE_BASIC && in dasd_decrease_state()
497 device->target <= DASD_STATE_KNOWN) in dasd_decrease_state()
498 rc = dasd_state_basic_to_known(device); in dasd_decrease_state()
501 device->state == DASD_STATE_KNOWN && in dasd_decrease_state()
502 device->target <= DASD_STATE_NEW) in dasd_decrease_state()
503 rc = dasd_state_known_to_new(device); in dasd_decrease_state()
511 static void dasd_change_state(struct dasd_device *device) in dasd_change_state() argument
515 if (device->state == device->target) in dasd_change_state()
518 if (device->state < device->target) in dasd_change_state()
519 rc = dasd_increase_state(device); in dasd_change_state()
521 rc = dasd_decrease_state(device); in dasd_change_state()
525 device->target = device->state; in dasd_change_state()
527 /* let user-space know that the device status changed */ in dasd_change_state()
528 kobject_uevent(&device->cdev->dev.kobj, KOBJ_CHANGE); in dasd_change_state()
530 if (device->state == device->target) in dasd_change_state()
542 struct dasd_device *device = container_of(work, struct dasd_device, kick_work); in do_kick_device() local
543 mutex_lock(&device->state_mutex); in do_kick_device()
544 dasd_change_state(device); in do_kick_device()
545 mutex_unlock(&device->state_mutex); in do_kick_device()
546 dasd_schedule_device_bh(device); in do_kick_device()
547 dasd_put_device(device); in do_kick_device()
550 void dasd_kick_device(struct dasd_device *device) in dasd_kick_device() argument
552 dasd_get_device(device); in dasd_kick_device()
554 if (!schedule_work(&device->kick_work)) in dasd_kick_device()
555 dasd_put_device(device); in dasd_kick_device()
565 struct dasd_device *device = container_of(work, struct dasd_device, in do_reload_device() local
567 device->discipline->reload(device); in do_reload_device()
568 dasd_put_device(device); in do_reload_device()
571 void dasd_reload_device(struct dasd_device *device) in dasd_reload_device() argument
573 dasd_get_device(device); in dasd_reload_device()
575 if (!schedule_work(&device->reload_device)) in dasd_reload_device()
576 dasd_put_device(device); in dasd_reload_device()
581 * Set the target state for a device and starts the state change.
583 void dasd_set_target_state(struct dasd_device *device, int target) in dasd_set_target_state() argument
585 dasd_get_device(device); in dasd_set_target_state()
586 mutex_lock(&device->state_mutex); in dasd_set_target_state()
590 if (device->target != target) { in dasd_set_target_state()
591 if (device->state == target) in dasd_set_target_state()
593 device->target = target; in dasd_set_target_state()
595 if (device->state != device->target) in dasd_set_target_state()
596 dasd_change_state(device); in dasd_set_target_state()
597 mutex_unlock(&device->state_mutex); in dasd_set_target_state()
598 dasd_put_device(device); in dasd_set_target_state()
602 * Enable devices with device numbers in [from..to].
604 static inline int _wait_for_device(struct dasd_device *device) in _wait_for_device() argument
606 return (device->state == device->target); in _wait_for_device()
609 void dasd_enable_device(struct dasd_device *device) in dasd_enable_device() argument
611 dasd_set_target_state(device, DASD_STATE_ONLINE); in dasd_enable_device()
612 if (device->state <= DASD_STATE_KNOWN) in dasd_enable_device()
613 /* No discipline for device found. */ in dasd_enable_device()
614 dasd_set_target_state(device, DASD_STATE_NEW); in dasd_enable_device()
616 wait_event(dasd_init_waitq, _wait_for_device(device)); in dasd_enable_device()
618 dasd_reload_device(device); in dasd_enable_device()
619 if (device->discipline->kick_validate) in dasd_enable_device()
620 device->discipline->kick_validate(device); in dasd_enable_device()
625 * SECTION: device operation (interrupt handler, start i/o, term i/o ...)
645 struct dasd_device *device; in dasd_profile_start() local
671 * We count the request for the start device, even though it may run on in dasd_profile_start()
672 * some other device due to error recovery. This way we make sure that in dasd_profile_start()
675 device = cqr->startdev; in dasd_profile_start()
676 if (device->profile.data) { in dasd_profile_start()
677 counter = 1; /* request is not yet queued on the start device */ in dasd_profile_start()
678 list_for_each(l, &device->ccw_queue) in dasd_profile_start()
682 spin_lock(&device->profile.lock); in dasd_profile_start()
683 if (device->profile.data) { in dasd_profile_start()
684 device->profile.data->dasd_io_nr_req[counter]++; in dasd_profile_start()
686 device->profile.data->dasd_read_nr_req[counter]++; in dasd_profile_start()
688 spin_unlock(&device->profile.lock); in dasd_profile_start()
755 struct dasd_device *device; in dasd_profile_end() local
760 device = cqr->startdev; in dasd_profile_end()
763 device->profile.data)) in dasd_profile_end()
822 spin_lock(&device->profile.lock); in dasd_profile_end()
823 if (device->profile.data) { in dasd_profile_end()
824 data = device->profile.data; in dasd_profile_end()
829 dasd_profile_end_add_data(device->profile.data, in dasd_profile_end()
838 spin_unlock(&device->profile.lock); in dasd_profile_end()
1130 struct dasd_device *device; in dasd_hosts_show() local
1133 device = m->private; in dasd_hosts_show()
1134 dasd_get_device(device); in dasd_hosts_show()
1136 if (device->discipline->hosts_print) in dasd_hosts_show()
1137 rc = device->discipline->hosts_print(device, m); in dasd_hosts_show()
1139 dasd_put_device(device); in dasd_hosts_show()
1145 static void dasd_hosts_exit(struct dasd_device *device) in dasd_hosts_exit() argument
1147 debugfs_remove(device->hosts_dentry); in dasd_hosts_exit()
1148 device->hosts_dentry = NULL; in dasd_hosts_exit()
1152 struct dasd_device *device) in dasd_hosts_init() argument
1162 device, &dasd_hosts_fops); in dasd_hosts_init()
1164 device->hosts_dentry = pde; in dasd_hosts_init()
1168 struct dasd_device *device, in dasd_smalloc_request() argument
1182 spin_lock_irqsave(&device->mem_lock, flags); in dasd_smalloc_request()
1183 data = chunk = dasd_alloc_chunk(&device->ccw_chunks, size); in dasd_smalloc_request()
1184 spin_unlock_irqrestore(&device->mem_lock, flags); in dasd_smalloc_request()
1204 dasd_get_device(device); in dasd_smalloc_request()
1211 struct dasd_device *device) in dasd_fmalloc_request() argument
1225 spin_lock_irqsave(&device->mem_lock, flags); in dasd_fmalloc_request()
1226 cqr = dasd_alloc_chunk(&device->ese_chunks, size); in dasd_fmalloc_request()
1227 spin_unlock_irqrestore(&device->mem_lock, flags); in dasd_fmalloc_request()
1246 dasd_get_device(device); in dasd_fmalloc_request()
1252 void dasd_sfree_request(struct dasd_ccw_req *cqr, struct dasd_device *device) in dasd_sfree_request() argument
1256 spin_lock_irqsave(&device->mem_lock, flags); in dasd_sfree_request()
1257 dasd_free_chunk(&device->ccw_chunks, cqr->mem_chunk); in dasd_sfree_request()
1258 spin_unlock_irqrestore(&device->mem_lock, flags); in dasd_sfree_request()
1259 dasd_put_device(device); in dasd_sfree_request()
1263 void dasd_ffree_request(struct dasd_ccw_req *cqr, struct dasd_device *device) in dasd_ffree_request() argument
1267 spin_lock_irqsave(&device->mem_lock, flags); in dasd_ffree_request()
1268 dasd_free_chunk(&device->ese_chunks, cqr); in dasd_ffree_request()
1269 spin_unlock_irqrestore(&device->mem_lock, flags); in dasd_ffree_request()
1270 dasd_put_device(device); in dasd_ffree_request()
1279 struct dasd_device *device; in dasd_check_cqr() local
1283 device = cqr->startdev; in dasd_check_cqr()
1284 if (strncmp((char *) &cqr->magic, device->discipline->ebcname, 4)) { in dasd_check_cqr()
1285 DBF_DEV_EVENT(DBF_WARNING, device, in dasd_check_cqr()
1289 *(unsigned int *) device->discipline->name); in dasd_check_cqr()
1297 * Timer keeps device runnig.
1303 struct dasd_device *device; in dasd_term_IO() local
1312 device = (struct dasd_device *) cqr->startdev; in dasd_term_IO()
1314 rc = ccw_device_clear(device->cdev, (long) cqr); in dasd_term_IO()
1320 DBF_DEV_EVENT(DBF_DEBUG, device, in dasd_term_IO()
1325 DBF_DEV_EVENT(DBF_ERR, device, "%s", in dasd_term_IO()
1326 "device gone, retry"); in dasd_term_IO()
1330 * device not valid so no I/O could be running in dasd_term_IO()
1338 DBF_DEV_EVENT(DBF_ERR, device, "%s", in dasd_term_IO()
1346 dev_err(&device->cdev->dev, "An error occurred in the " in dasd_term_IO()
1347 "DASD device driver, reason=%s\n", errorstring); in dasd_term_IO()
1353 dasd_schedule_device_bh(device); in dasd_term_IO()
1364 struct dasd_device *device; in dasd_start_IO() local
1374 device = (struct dasd_device *) cqr->startdev; in dasd_start_IO()
1377 test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags)) && in dasd_start_IO()
1379 DBF_DEV_EVENT(DBF_DEBUG, device, "start_IO: return request %p " in dasd_start_IO()
1388 dev_err(&device->cdev->dev, "An error occurred in the DASD " in dasd_start_IO()
1389 "device driver, reason=%s\n", errorstring); in dasd_start_IO()
1397 cqr->lpm &= dasd_path_get_opm(device); in dasd_start_IO()
1399 cqr->lpm = dasd_path_get_opm(device); in dasd_start_IO()
1409 rc = ccw_device_tm_start(device->cdev, cqr->cpaddr, in dasd_start_IO()
1412 rc = ccw_device_start(device->cdev, cqr->cpaddr, in dasd_start_IO()
1420 DBF_DEV_EVENT(DBF_WARNING, device, "%s", in dasd_start_IO()
1421 "start_IO: device busy, retry later"); in dasd_start_IO()
1432 DBF_DEV_EVENT(DBF_WARNING, device, in dasd_start_IO()
1435 } else if (cqr->lpm != dasd_path_get_opm(device)) { in dasd_start_IO()
1436 cqr->lpm = dasd_path_get_opm(device); in dasd_start_IO()
1437 DBF_DEV_EVENT(DBF_DEBUG, device, "%s", in dasd_start_IO()
1441 DBF_DEV_EVENT(DBF_WARNING, device, "%s", in dasd_start_IO()
1444 dasd_generic_last_path_gone(device); in dasd_start_IO()
1445 dasd_path_no_path(device); in dasd_start_IO()
1446 dasd_path_set_tbvpm(device, in dasd_start_IO()
1448 device->cdev)); in dasd_start_IO()
1452 DBF_DEV_EVENT(DBF_WARNING, device, "%s", in dasd_start_IO()
1453 "start_IO: -ENODEV device gone, retry"); in dasd_start_IO()
1456 DBF_DEV_EVENT(DBF_WARNING, device, "%s", in dasd_start_IO()
1457 "start_IO: -EIO device gone, retry"); in dasd_start_IO()
1460 DBF_DEV_EVENT(DBF_WARNING, device, "%s", in dasd_start_IO()
1461 "start_IO: -EINVAL device currently " in dasd_start_IO()
1467 dev_err(&device->cdev->dev, in dasd_start_IO()
1468 "An error occurred in the DASD device driver, " in dasd_start_IO()
1489 struct dasd_device *device; in dasd_device_timeout() local
1491 device = from_timer(device, t, timer); in dasd_device_timeout()
1492 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); in dasd_device_timeout()
1494 dasd_device_remove_stop_bits(device, DASD_STOPPED_PENDING); in dasd_device_timeout()
1495 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); in dasd_device_timeout()
1496 dasd_schedule_device_bh(device); in dasd_device_timeout()
1500 * Setup timeout for a device in jiffies.
1502 void dasd_device_set_timer(struct dasd_device *device, int expires) in dasd_device_set_timer() argument
1505 del_timer(&device->timer); in dasd_device_set_timer()
1507 mod_timer(&device->timer, jiffies + expires); in dasd_device_set_timer()
1512 * Clear timeout for a device.
1514 void dasd_device_clear_timer(struct dasd_device *device) in dasd_device_clear_timer() argument
1516 del_timer(&device->timer); in dasd_device_clear_timer()
1524 struct dasd_device *device; in dasd_handle_killed_request() local
1536 device = dasd_device_from_cdev_locked(cdev); in dasd_handle_killed_request()
1537 if (IS_ERR(device)) { in dasd_handle_killed_request()
1539 "unable to get device from cdev"); in dasd_handle_killed_request()
1544 device != cqr->startdev || in dasd_handle_killed_request()
1548 "invalid device in request"); in dasd_handle_killed_request()
1549 dasd_put_device(device); in dasd_handle_killed_request()
1556 dasd_device_clear_timer(device); in dasd_handle_killed_request()
1557 dasd_schedule_device_bh(device); in dasd_handle_killed_request()
1558 dasd_put_device(device); in dasd_handle_killed_request()
1561 void dasd_generic_handle_state_change(struct dasd_device *device) in dasd_generic_handle_state_change() argument
1564 dasd_eer_snss(device); in dasd_generic_handle_state_change()
1566 dasd_device_remove_stop_bits(device, DASD_STOPPED_PENDING); in dasd_generic_handle_state_change()
1567 dasd_schedule_device_bh(device); in dasd_generic_handle_state_change()
1568 if (device->block) { in dasd_generic_handle_state_change()
1569 dasd_schedule_block_bh(device->block); in dasd_generic_handle_state_change()
1570 if (device->block->gdp) in dasd_generic_handle_state_change()
1571 blk_mq_run_hw_queues(device->block->gdp->queue, true); in dasd_generic_handle_state_change()
1585 struct dasd_device *device = NULL; in dasd_ese_needs_format() local
1590 device = block->base; in dasd_ese_needs_format()
1591 if (!device || !device->discipline->is_ese) in dasd_ese_needs_format()
1593 if (!device->discipline->is_ese(device)) in dasd_ese_needs_format()
1620 struct dasd_device *device; in dasd_int_handler() local
1633 device = cqr->startdev; in dasd_int_handler()
1635 dasd_device_clear_timer(device); in dasd_int_handler()
1637 dasd_schedule_device_bh(device); in dasd_int_handler()
1661 device = dasd_device_from_cdev_locked(cdev); in dasd_int_handler()
1662 if (IS_ERR(device)) in dasd_int_handler()
1665 if (device->discipline == dasd_diag_discipline_pointer) { in dasd_int_handler()
1666 dasd_put_device(device); in dasd_int_handler()
1685 * Stop device and check exhaust level. in dasd_int_handler()
1688 dasd_generic_space_exhaust(device, cqr); in dasd_int_handler()
1689 device->discipline->ext_pool_exhaust(device, cqr); in dasd_int_handler()
1690 dasd_put_device(device); in dasd_int_handler()
1695 device->discipline->dump_sense_dbf(device, irb, "int"); in dasd_int_handler()
1697 if (device->features & DASD_FEATURE_ERPLOG) in dasd_int_handler()
1698 device->discipline->dump_sense(device, cqr, irb); in dasd_int_handler()
1699 device->discipline->check_for_device_change(device, cqr, irb); in dasd_int_handler()
1700 dasd_put_device(device); in dasd_int_handler()
1705 device = dasd_device_from_cdev_locked(cdev); in dasd_int_handler()
1706 if (!IS_ERR(device)) { in dasd_int_handler()
1707 device->discipline->check_attention(device, in dasd_int_handler()
1709 dasd_put_device(device); in dasd_int_handler()
1716 device = (struct dasd_device *) cqr->startdev; in dasd_int_handler()
1717 if (!device || in dasd_int_handler()
1718 strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) { in dasd_int_handler()
1720 "invalid device in request"); in dasd_int_handler()
1731 device->discipline->ese_read(cqr, irb); in dasd_int_handler()
1734 dasd_device_clear_timer(device); in dasd_int_handler()
1735 dasd_schedule_device_bh(device); in dasd_int_handler()
1738 fcqr = device->discipline->ese_format(device, cqr, irb); in dasd_int_handler()
1749 dasd_schedule_device_bh(device); in dasd_int_handler()
1754 list_add(&fcqr->devlist, &device->ccw_queue); in dasd_int_handler()
1755 dasd_schedule_device_bh(device); in dasd_int_handler()
1764 dasd_device_clear_timer(device); in dasd_int_handler()
1766 dasd_schedule_device_bh(device); in dasd_int_handler()
1772 DBF_DEV_EVENT(DBF_DEBUG, device, "invalid status: bus_id %s, " in dasd_int_handler()
1785 if (cqr->devlist.next != &device->ccw_queue) { in dasd_int_handler()
1795 device->discipline->handle_hpf_error) in dasd_int_handler()
1796 device->discipline->handle_hpf_error(device, irb); in dasd_int_handler()
1803 if (cqr->lpm == dasd_path_get_opm(device)) in dasd_int_handler()
1804 DBF_DEV_EVENT(DBF_DEBUG, device, in dasd_int_handler()
1809 cqr->lpm = dasd_path_get_opm(device); in dasd_int_handler()
1816 (!device->stopped)) { in dasd_int_handler()
1817 if (device->discipline->start_IO(next) == 0) in dasd_int_handler()
1821 dasd_device_set_timer(device, expires); in dasd_int_handler()
1823 dasd_device_clear_timer(device); in dasd_int_handler()
1824 dasd_schedule_device_bh(device); in dasd_int_handler()
1830 struct dasd_device *device; in dasd_generic_uc_handler() local
1832 device = dasd_device_from_cdev_locked(cdev); in dasd_generic_uc_handler()
1834 if (IS_ERR(device)) in dasd_generic_uc_handler()
1836 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || in dasd_generic_uc_handler()
1837 device->state != device->target || in dasd_generic_uc_handler()
1838 !device->discipline->check_for_device_change){ in dasd_generic_uc_handler()
1839 dasd_put_device(device); in dasd_generic_uc_handler()
1842 if (device->discipline->dump_sense_dbf) in dasd_generic_uc_handler()
1843 device->discipline->dump_sense_dbf(device, irb, "uc"); in dasd_generic_uc_handler()
1844 device->discipline->check_for_device_change(device, NULL, irb); in dasd_generic_uc_handler()
1845 dasd_put_device(device); in dasd_generic_uc_handler()
1855 static void __dasd_device_recovery(struct dasd_device *device, in __dasd_device_recovery() argument
1867 list_for_each_safe(l, n, &device->ccw_queue) { in __dasd_device_recovery()
1880 static void __dasd_device_process_ccw_queue(struct dasd_device *device, in __dasd_device_process_ccw_queue() argument
1887 list_for_each_safe(l, n, &device->ccw_queue) { in __dasd_device_process_ccw_queue()
1896 __dasd_device_recovery(device, cqr); in __dasd_device_process_ccw_queue()
1903 static void __dasd_process_cqr(struct dasd_device *device, in __dasd_process_cqr() argument
1921 dev_err(&device->cdev->dev, in __dasd_process_cqr()
1922 "An error occurred in the DASD device driver, " in __dasd_process_cqr()
1934 static void __dasd_device_process_final_queue(struct dasd_device *device, in __dasd_device_process_final_queue() argument
1946 __dasd_process_cqr(device, cqr); in __dasd_device_process_final_queue()
1949 __dasd_process_cqr(device, cqr); in __dasd_device_process_final_queue()
1959 static void __dasd_device_check_expire(struct dasd_device *device) in __dasd_device_check_expire() argument
1963 if (list_empty(&device->ccw_queue)) in __dasd_device_check_expire()
1965 cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, devlist); in __dasd_device_check_expire()
1968 if (test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) { in __dasd_device_check_expire()
1975 if (device->discipline->term_IO(cqr) != 0) { in __dasd_device_check_expire()
1977 dev_err(&device->cdev->dev, in __dasd_device_check_expire()
1982 dasd_device_set_timer(device, 5*HZ); in __dasd_device_check_expire()
1984 dev_err(&device->cdev->dev, in __dasd_device_check_expire()
1993 * return 1 when device is not eligible for IO
1995 static int __dasd_device_is_unusable(struct dasd_device *device, in __dasd_device_is_unusable() argument
2000 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) && in __dasd_device_is_unusable()
2001 !test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) { in __dasd_device_is_unusable()
2008 if (device->stopped) { in __dasd_device_is_unusable()
2009 if (device->stopped & mask) { in __dasd_device_is_unusable()
2014 /* CQR is not able to change device to in __dasd_device_is_unusable()
2018 /* CQR required to get device operational. */ in __dasd_device_is_unusable()
2027 static void __dasd_device_start_head(struct dasd_device *device) in __dasd_device_start_head() argument
2032 if (list_empty(&device->ccw_queue)) in __dasd_device_start_head()
2034 cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, devlist); in __dasd_device_start_head()
2037 /* if device is not usable return request to upper layer */ in __dasd_device_start_head()
2038 if (__dasd_device_is_unusable(device, cqr)) { in __dasd_device_start_head()
2041 dasd_schedule_device_bh(device); in __dasd_device_start_head()
2045 rc = device->discipline->start_IO(cqr); in __dasd_device_start_head()
2047 dasd_device_set_timer(device, cqr->expires); in __dasd_device_start_head()
2049 dasd_schedule_device_bh(device); in __dasd_device_start_head()
2052 dasd_device_set_timer(device, 50); in __dasd_device_start_head()
2055 static void __dasd_device_check_path_events(struct dasd_device *device) in __dasd_device_check_path_events() argument
2060 tbvpm = dasd_path_get_tbvpm(device); in __dasd_device_check_path_events()
2061 fcsecpm = dasd_path_get_fcsecpm(device); in __dasd_device_check_path_events()
2066 if (device->stopped & ~(DASD_STOPPED_DC_WAIT)) in __dasd_device_check_path_events()
2069 dasd_path_clear_all_verify(device); in __dasd_device_check_path_events()
2070 dasd_path_clear_all_fcsec(device); in __dasd_device_check_path_events()
2072 rc = device->discipline->pe_handler(device, tbvpm, fcsecpm); in __dasd_device_check_path_events()
2074 dasd_path_add_tbvpm(device, tbvpm); in __dasd_device_check_path_events()
2075 dasd_path_add_fcsecpm(device, fcsecpm); in __dasd_device_check_path_events()
2076 dasd_device_set_timer(device, 50); in __dasd_device_check_path_events()
2086 * this function is called!. In other words, when 'device' is a base
2087 * device then all block layer requests must have been removed before
2090 int dasd_flush_device_queue(struct dasd_device *device) in dasd_flush_device_queue() argument
2097 spin_lock_irq(get_ccwdev_lock(device->cdev)); in dasd_flush_device_queue()
2099 list_for_each_entry_safe(cqr, n, &device->ccw_queue, devlist) { in dasd_flush_device_queue()
2103 rc = device->discipline->term_IO(cqr); in dasd_flush_device_queue()
2106 dev_err(&device->cdev->dev, in dasd_flush_device_queue()
2123 spin_unlock_irq(get_ccwdev_lock(device->cdev)); in dasd_flush_device_queue()
2136 __dasd_device_process_final_queue(device, &flush_queue); in dasd_flush_device_queue()
2142 * Acquire the device lock and process queues for the device.
2146 struct dasd_device *device = (struct dasd_device *) data; in dasd_device_tasklet() local
2149 atomic_set (&device->tasklet_scheduled, 0); in dasd_device_tasklet()
2151 spin_lock_irq(get_ccwdev_lock(device->cdev)); in dasd_device_tasklet()
2153 __dasd_device_check_expire(device); in dasd_device_tasklet()
2155 __dasd_device_process_ccw_queue(device, &final_queue); in dasd_device_tasklet()
2156 __dasd_device_check_path_events(device); in dasd_device_tasklet()
2157 spin_unlock_irq(get_ccwdev_lock(device->cdev)); in dasd_device_tasklet()
2159 __dasd_device_process_final_queue(device, &final_queue); in dasd_device_tasklet()
2160 spin_lock_irq(get_ccwdev_lock(device->cdev)); in dasd_device_tasklet()
2162 __dasd_device_start_head(device); in dasd_device_tasklet()
2163 spin_unlock_irq(get_ccwdev_lock(device->cdev)); in dasd_device_tasklet()
2166 dasd_put_device(device); in dasd_device_tasklet()
2170 * Schedules a call to dasd_tasklet over the device tasklet.
2172 void dasd_schedule_device_bh(struct dasd_device *device) in dasd_schedule_device_bh() argument
2175 if (atomic_cmpxchg (&device->tasklet_scheduled, 0, 1) != 0) in dasd_schedule_device_bh()
2177 dasd_get_device(device); in dasd_schedule_device_bh()
2178 tasklet_hi_schedule(&device->tasklet); in dasd_schedule_device_bh()
2182 void dasd_device_set_stop_bits(struct dasd_device *device, int bits) in dasd_device_set_stop_bits() argument
2184 device->stopped |= bits; in dasd_device_set_stop_bits()
2188 void dasd_device_remove_stop_bits(struct dasd_device *device, int bits) in dasd_device_remove_stop_bits() argument
2190 device->stopped &= ~bits; in dasd_device_remove_stop_bits()
2191 if (!device->stopped) in dasd_device_remove_stop_bits()
2197 * Queue a request to the head of the device ccw_queue.
2202 struct dasd_device *device; in dasd_add_request_head() local
2205 device = cqr->startdev; in dasd_add_request_head()
2206 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); in dasd_add_request_head()
2208 list_add(&cqr->devlist, &device->ccw_queue); in dasd_add_request_head()
2210 dasd_schedule_device_bh(device); in dasd_add_request_head()
2211 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); in dasd_add_request_head()
2216 * Queue a request to the tail of the device ccw_queue.
2221 struct dasd_device *device; in dasd_add_request_tail() local
2224 device = cqr->startdev; in dasd_add_request_tail()
2225 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); in dasd_add_request_tail()
2227 list_add_tail(&cqr->devlist, &device->ccw_queue); in dasd_add_request_tail()
2229 dasd_schedule_device_bh(device); in dasd_add_request_tail()
2230 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); in dasd_add_request_tail()
2248 struct dasd_device *device; in _wait_for_wakeup() local
2251 device = cqr->startdev; in _wait_for_wakeup()
2252 spin_lock_irq(get_ccwdev_lock(device->cdev)); in _wait_for_wakeup()
2254 spin_unlock_irq(get_ccwdev_lock(device->cdev)); in _wait_for_wakeup()
2263 struct dasd_device *device; in __dasd_sleep_on_erp() local
2268 device = cqr->startdev; in __dasd_sleep_on_erp()
2271 device->discipline->handle_terminated_request(cqr); in __dasd_sleep_on_erp()
2275 erp_fn = device->discipline->erp_action(cqr); in __dasd_sleep_on_erp()
2282 __dasd_process_erp(device, cqr); in __dasd_sleep_on_erp()
2302 struct dasd_device *device; in _dasd_sleep_on() local
2309 device = maincqr->startdev; in _dasd_sleep_on()
2319 if (test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags) && in _dasd_sleep_on()
2326 if (device->stopped & ~DASD_STOPPED_PENDING && in _dasd_sleep_on()
2328 (!dasd_eer_enabled(device))) { in _dasd_sleep_on()
2334 * Don't try to start requests if device is in in _dasd_sleep_on()
2337 if (test_bit(DASD_FLAG_OFFLINE, &device->flags)) { in _dasd_sleep_on()
2343 * Don't try to start requests if device is stopped in _dasd_sleep_on()
2349 generic_waitq, !(device->stopped)); in _dasd_sleep_on()
2356 wait_event(generic_waitq, !(device->stopped)); in _dasd_sleep_on()
2406 struct dasd_device *device; in _dasd_sleep_on_queue() local
2413 device = cqr->startdev; in _dasd_sleep_on_queue()
2417 if (test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags) && in _dasd_sleep_on_queue()
2424 if (device->stopped & ~DASD_STOPPED_PENDING && in _dasd_sleep_on_queue()
2426 !dasd_eer_enabled(device)) { in _dasd_sleep_on_queue()
2432 /*Don't try to start requests if device is stopped*/ in _dasd_sleep_on_queue()
2435 generic_waitq, !device->stopped); in _dasd_sleep_on_queue()
2442 wait_event(generic_waitq, !(device->stopped)); in _dasd_sleep_on_queue()
2488 * Queue a request to the tail of the device ccw_queue and wait for
2516 * Queue a request to the tail of the device ccw_queue and wait
2531 static inline int _dasd_term_running_cqr(struct dasd_device *device) in _dasd_term_running_cqr() argument
2536 if (list_empty(&device->ccw_queue)) in _dasd_term_running_cqr()
2538 cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, devlist); in _dasd_term_running_cqr()
2539 rc = device->discipline->term_IO(cqr); in _dasd_term_running_cqr()
2552 struct dasd_device *device; in dasd_sleep_on_immediatly() local
2555 device = cqr->startdev; in dasd_sleep_on_immediatly()
2556 if (test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags) && in dasd_sleep_on_immediatly()
2562 spin_lock_irq(get_ccwdev_lock(device->cdev)); in dasd_sleep_on_immediatly()
2563 rc = _dasd_term_running_cqr(device); in dasd_sleep_on_immediatly()
2565 spin_unlock_irq(get_ccwdev_lock(device->cdev)); in dasd_sleep_on_immediatly()
2575 list_add(&cqr->devlist, device->ccw_queue.next); in dasd_sleep_on_immediatly()
2578 dasd_schedule_device_bh(device); in dasd_sleep_on_immediatly()
2580 spin_unlock_irq(get_ccwdev_lock(device->cdev)); in dasd_sleep_on_immediatly()
2592 dasd_schedule_device_bh(device); in dasd_sleep_on_immediatly()
2593 if (device->block) in dasd_sleep_on_immediatly()
2594 dasd_schedule_block_bh(device->block); in dasd_sleep_on_immediatly()
2611 struct dasd_device *device = cqr->startdev; in __dasd_cancel_req() local
2621 rc = device->discipline->term_IO(cqr); in __dasd_cancel_req()
2623 dev_err(&device->cdev->dev, in __dasd_cancel_req()
2633 dasd_schedule_device_bh(device); in __dasd_cancel_req()
2639 struct dasd_device *device = cqr->startdev; in dasd_cancel_req() local
2643 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); in dasd_cancel_req()
2645 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); in dasd_cancel_req()
2696 static void __dasd_process_erp(struct dasd_device *device, in __dasd_process_erp() argument
2702 DBF_DEV_EVENT(DBF_NOTICE, device, "%s", "ERP successful"); in __dasd_process_erp()
2704 dev_err(&device->cdev->dev, "ERP failed for the DASD\n"); in __dasd_process_erp()
2705 erp_fn = device->discipline->erp_postaction(cqr); in __dasd_process_erp()
2865 /* Don't try to start requests if device is stopped */ in __dasd_block_start_head()
3009 * Schedules a call to dasd_tasklet over the device tasklet.
3016 /* life cycle of block is bound to it's base device */ in dasd_schedule_block_bh()
3024 * SECTION: external block device operations
3046 "device not ready for request %p", req); in do_dasd_request()
3052 * if device is stopped do not fetch new requests in do_dasd_request()
3058 "device stopped request %p", req); in do_dasd_request()
3126 struct dasd_device *device; in dasd_times_out() local
3136 device = cqr->startdev ? cqr->startdev : block->base; in dasd_times_out()
3137 if (!device->blk_timeout) { in dasd_times_out()
3141 DBF_DEV_EVENT(DBF_WARNING, device, in dasd_times_out()
3146 spin_lock(get_ccwdev_lock(device->cdev)); in dasd_times_out()
3183 spin_unlock(get_ccwdev_lock(device->cdev)); in dasd_times_out()
3255 " Cannot open unrecognized device"); in dasd_open()
3322 * end of block device operations
3348 * Is the device read-only?
3350 * readonly device attribute, but how it is configured in z/VM.
3352 int dasd_device_is_ro(struct dasd_device *device) in dasd_device_is_ro() argument
3360 ccw_device_get_id(device->cdev, &dev_id); in dasd_device_is_ro()
3406 void dasd_generic_free_discipline(struct dasd_device *device) in dasd_generic_free_discipline() argument
3409 if (device->discipline) { in dasd_generic_free_discipline()
3410 if (device->discipline->uncheck_device) in dasd_generic_free_discipline()
3411 device->discipline->uncheck_device(device); in dasd_generic_free_discipline()
3412 module_put(device->discipline->owner); in dasd_generic_free_discipline()
3413 device->discipline = NULL; in dasd_generic_free_discipline()
3415 if (device->base_discipline) { in dasd_generic_free_discipline()
3416 module_put(device->base_discipline->owner); in dasd_generic_free_discipline()
3417 device->base_discipline = NULL; in dasd_generic_free_discipline()
3428 struct dasd_device *device; in dasd_generic_remove() local
3431 device = dasd_device_from_cdev(cdev); in dasd_generic_remove()
3432 if (IS_ERR(device)) in dasd_generic_remove()
3435 if (test_and_set_bit(DASD_FLAG_OFFLINE, &device->flags) && in dasd_generic_remove()
3436 !test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) { in dasd_generic_remove()
3438 dasd_put_device(device); in dasd_generic_remove()
3442 * This device is removed unconditionally. Set offline in dasd_generic_remove()
3446 dasd_set_target_state(device, DASD_STATE_NEW); in dasd_generic_remove()
3448 /* dasd_delete_device destroys the device reference. */ in dasd_generic_remove()
3449 block = device->block; in dasd_generic_remove()
3450 dasd_delete_device(device); in dasd_generic_remove()
3452 * life cycle of block is bound to device, so delete it after in dasd_generic_remove()
3453 * device was safely removed in dasd_generic_remove()
3461 * Activate a device. This is called from dasd_{eckd,fba}_probe() when either
3462 * the device is detected for the first time and is supposed to be used
3469 struct dasd_device *device; in dasd_generic_set_online() local
3474 device = dasd_create_device(cdev); in dasd_generic_set_online()
3475 if (IS_ERR(device)) in dasd_generic_set_online()
3476 return PTR_ERR(device); in dasd_generic_set_online()
3479 if (device->features & DASD_FEATURE_USEDIAG) { in dasd_generic_set_online()
3489 dasd_delete_device(device); in dasd_generic_set_online()
3498 dasd_delete_device(device); in dasd_generic_set_online()
3504 dasd_delete_device(device); in dasd_generic_set_online()
3509 dasd_delete_device(device); in dasd_generic_set_online()
3512 device->base_discipline = base_discipline; in dasd_generic_set_online()
3513 device->discipline = discipline; in dasd_generic_set_online()
3515 /* check_device will allocate block device if necessary */ in dasd_generic_set_online()
3516 rc = discipline->check_device(device); in dasd_generic_set_online()
3522 dasd_delete_device(device); in dasd_generic_set_online()
3526 dasd_set_target_state(device, DASD_STATE_ONLINE); in dasd_generic_set_online()
3527 if (device->state <= DASD_STATE_KNOWN) { in dasd_generic_set_online()
3531 dasd_set_target_state(device, DASD_STATE_NEW); in dasd_generic_set_online()
3532 if (device->block) in dasd_generic_set_online()
3533 dasd_free_block(device->block); in dasd_generic_set_online()
3534 dasd_delete_device(device); in dasd_generic_set_online()
3536 pr_debug("dasd_generic device %s found\n", in dasd_generic_set_online()
3539 wait_event(dasd_init_waitq, _wait_for_device(device)); in dasd_generic_set_online()
3541 dasd_put_device(device); in dasd_generic_set_online()
3548 struct dasd_device *device; in dasd_generic_set_offline() local
3555 device = dasd_device_from_cdev_locked(cdev); in dasd_generic_set_offline()
3556 if (IS_ERR(device)) { in dasd_generic_set_offline()
3558 return PTR_ERR(device); in dasd_generic_set_offline()
3562 * We must make sure that this device is currently not in use. in dasd_generic_set_offline()
3567 if (device->block) { in dasd_generic_set_offline()
3568 max_count = device->block->bdev ? 0 : -1; in dasd_generic_set_offline()
3569 open_count = atomic_read(&device->block->open_count); in dasd_generic_set_offline()
3588 if (test_bit(DASD_FLAG_OFFLINE, &device->flags)) { in dasd_generic_set_offline()
3589 if (test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) { in dasd_generic_set_offline()
3591 &device->flags); in dasd_generic_set_offline()
3597 set_bit(DASD_FLAG_OFFLINE, &device->flags); in dasd_generic_set_offline()
3604 if (test_and_clear_bit(DASD_FLAG_SAFE_OFFLINE, &device->flags) && in dasd_generic_set_offline()
3605 !test_and_set_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) { in dasd_generic_set_offline()
3609 * If we want to set the device safe offline all IO operations in dasd_generic_set_offline()
3614 if (device->block) { in dasd_generic_set_offline()
3615 rc = fsync_bdev(device->block->bdev); in dasd_generic_set_offline()
3619 dasd_schedule_device_bh(device); in dasd_generic_set_offline()
3621 _wait_for_empty_queues(device)); in dasd_generic_set_offline()
3633 if (!test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) { in dasd_generic_set_offline()
3637 clear_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags); in dasd_generic_set_offline()
3641 dasd_set_target_state(device, DASD_STATE_NEW); in dasd_generic_set_offline()
3642 /* dasd_delete_device destroys the device reference. */ in dasd_generic_set_offline()
3643 block = device->block; in dasd_generic_set_offline()
3644 dasd_delete_device(device); in dasd_generic_set_offline()
3646 * life cycle of block is bound to device, so delete it after in dasd_generic_set_offline()
3647 * device was safely removed in dasd_generic_set_offline()
3657 clear_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags); in dasd_generic_set_offline()
3658 clear_bit(DASD_FLAG_OFFLINE, &device->flags); in dasd_generic_set_offline()
3660 dasd_put_device(device); in dasd_generic_set_offline()
3666 int dasd_generic_last_path_gone(struct dasd_device *device) in dasd_generic_last_path_gone() argument
3670 dev_warn(&device->cdev->dev, "No operational channel path is left " in dasd_generic_last_path_gone()
3671 "for the device\n"); in dasd_generic_last_path_gone()
3672 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "last path gone"); in dasd_generic_last_path_gone()
3674 dasd_eer_write(device, NULL, DASD_EER_NOPATH); in dasd_generic_last_path_gone()
3676 if (device->state < DASD_STATE_BASIC) in dasd_generic_last_path_gone()
3678 /* Device is active. We want to keep it. */ in dasd_generic_last_path_gone()
3679 list_for_each_entry(cqr, &device->ccw_queue, devlist) in dasd_generic_last_path_gone()
3685 dasd_device_set_stop_bits(device, DASD_STOPPED_DC_WAIT); in dasd_generic_last_path_gone()
3686 dasd_device_clear_timer(device); in dasd_generic_last_path_gone()
3687 dasd_schedule_device_bh(device); in dasd_generic_last_path_gone()
3692 int dasd_generic_path_operational(struct dasd_device *device) in dasd_generic_path_operational() argument
3694 dev_info(&device->cdev->dev, "A channel path to the device has become " in dasd_generic_path_operational()
3696 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "path operational"); in dasd_generic_path_operational()
3697 dasd_device_remove_stop_bits(device, DASD_STOPPED_DC_WAIT); in dasd_generic_path_operational()
3698 dasd_schedule_device_bh(device); in dasd_generic_path_operational()
3699 if (device->block) { in dasd_generic_path_operational()
3700 dasd_schedule_block_bh(device->block); in dasd_generic_path_operational()
3701 if (device->block->gdp) in dasd_generic_path_operational()
3702 blk_mq_run_hw_queues(device->block->gdp->queue, true); in dasd_generic_path_operational()
3705 if (!device->stopped) in dasd_generic_path_operational()
3714 struct dasd_device *device; in dasd_generic_notify() local
3717 device = dasd_device_from_cdev_locked(cdev); in dasd_generic_notify()
3718 if (IS_ERR(device)) in dasd_generic_notify()
3725 dasd_path_no_path(device); in dasd_generic_notify()
3726 ret = dasd_generic_last_path_gone(device); in dasd_generic_notify()
3730 if (dasd_path_get_opm(device)) in dasd_generic_notify()
3731 ret = dasd_generic_path_operational(device); in dasd_generic_notify()
3734 dasd_put_device(device); in dasd_generic_notify()
3741 struct dasd_device *device; in dasd_generic_path_event() local
3744 device = dasd_device_from_cdev_locked(cdev); in dasd_generic_path_event()
3745 if (IS_ERR(device)) in dasd_generic_path_event()
3748 oldopm = dasd_path_get_opm(device); in dasd_generic_path_event()
3751 dasd_path_notoper(device, chp); in dasd_generic_path_event()
3754 dasd_path_available(device, chp); in dasd_generic_path_event()
3755 dasd_schedule_device_bh(device); in dasd_generic_path_event()
3758 if (!dasd_path_is_operational(device, chp) && in dasd_generic_path_event()
3759 !dasd_path_need_verify(device, chp)) { in dasd_generic_path_event()
3765 dasd_path_available(device, chp); in dasd_generic_path_event()
3766 dasd_schedule_device_bh(device); in dasd_generic_path_event()
3768 DBF_DEV_EVENT(DBF_WARNING, device, "%s", in dasd_generic_path_event()
3770 if (device->discipline->kick_validate) in dasd_generic_path_event()
3771 device->discipline->kick_validate(device); in dasd_generic_path_event()
3774 dasd_path_fcsec_update(device, chp); in dasd_generic_path_event()
3775 dasd_schedule_device_bh(device); in dasd_generic_path_event()
3778 hpfpm = dasd_path_get_hpfpm(device); in dasd_generic_path_event()
3779 ifccpm = dasd_path_get_ifccpm(device); in dasd_generic_path_event()
3780 if (!dasd_path_get_opm(device) && hpfpm) { in dasd_generic_path_event()
3782 * device has no operational paths but at least one path is in dasd_generic_path_event()
3786 if (device->discipline->disable_hpf) in dasd_generic_path_event()
3787 device->discipline->disable_hpf(device); in dasd_generic_path_event()
3788 dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); in dasd_generic_path_event()
3789 dasd_path_set_tbvpm(device, hpfpm); in dasd_generic_path_event()
3790 dasd_schedule_device_bh(device); in dasd_generic_path_event()
3791 dasd_schedule_requeue(device); in dasd_generic_path_event()
3792 } else if (!dasd_path_get_opm(device) && ifccpm) { in dasd_generic_path_event()
3794 * device has no operational paths but at least one path is in dasd_generic_path_event()
3798 dasd_path_set_tbvpm(device, ifccpm); in dasd_generic_path_event()
3799 dasd_schedule_device_bh(device); in dasd_generic_path_event()
3801 if (oldopm && !dasd_path_get_opm(device) && !hpfpm && !ifccpm) { in dasd_generic_path_event()
3802 dev_warn(&device->cdev->dev, in dasd_generic_path_event()
3803 "No verified channel paths remain for the device\n"); in dasd_generic_path_event()
3804 DBF_DEV_EVENT(DBF_WARNING, device, in dasd_generic_path_event()
3806 dasd_eer_write(device, NULL, DASD_EER_NOPATH); in dasd_generic_path_event()
3807 dasd_device_set_stop_bits(device, in dasd_generic_path_event()
3810 dasd_put_device(device); in dasd_generic_path_event()
3814 int dasd_generic_verify_path(struct dasd_device *device, __u8 lpm) in dasd_generic_verify_path() argument
3816 if (!dasd_path_get_opm(device) && lpm) { in dasd_generic_verify_path()
3817 dasd_path_set_opm(device, lpm); in dasd_generic_verify_path()
3818 dasd_generic_path_operational(device); in dasd_generic_verify_path()
3820 dasd_path_add_opm(device, lpm); in dasd_generic_verify_path()
3825 void dasd_generic_space_exhaust(struct dasd_device *device, in dasd_generic_space_exhaust() argument
3828 dasd_eer_write(device, NULL, DASD_EER_NOSPC); in dasd_generic_space_exhaust()
3830 if (device->state < DASD_STATE_BASIC) in dasd_generic_space_exhaust()
3838 dasd_device_set_stop_bits(device, DASD_STOPPED_NOSPC); in dasd_generic_space_exhaust()
3839 dasd_device_clear_timer(device); in dasd_generic_space_exhaust()
3840 dasd_schedule_device_bh(device); in dasd_generic_space_exhaust()
3844 void dasd_generic_space_avail(struct dasd_device *device) in dasd_generic_space_avail() argument
3846 dev_info(&device->cdev->dev, "Extent pool space is available\n"); in dasd_generic_space_avail()
3847 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "space available"); in dasd_generic_space_avail()
3849 dasd_device_remove_stop_bits(device, DASD_STOPPED_NOSPC); in dasd_generic_space_avail()
3850 dasd_schedule_device_bh(device); in dasd_generic_space_avail()
3852 if (device->block) { in dasd_generic_space_avail()
3853 dasd_schedule_block_bh(device->block); in dasd_generic_space_avail()
3854 if (device->block->gdp) in dasd_generic_space_avail()
3855 blk_mq_run_hw_queues(device->block->gdp->queue, true); in dasd_generic_space_avail()
3857 if (!device->stopped) in dasd_generic_space_avail()
3865 int dasd_generic_requeue_all_requests(struct dasd_device *device) in dasd_generic_requeue_all_requests() argument
3873 spin_lock_irq(get_ccwdev_lock(device->cdev)); in dasd_generic_requeue_all_requests()
3875 list_for_each_entry_safe(cqr, n, &device->ccw_queue, devlist) { in dasd_generic_requeue_all_requests()
3878 rc = device->discipline->term_IO(cqr); in dasd_generic_requeue_all_requests()
3881 dev_err(&device->cdev->dev, in dasd_generic_requeue_all_requests()
3884 spin_unlock_irq(get_ccwdev_lock(device->cdev)); in dasd_generic_requeue_all_requests()
3885 dasd_put_device(device); in dasd_generic_requeue_all_requests()
3891 spin_unlock_irq(get_ccwdev_lock(device->cdev)); in dasd_generic_requeue_all_requests()
3899 * for block device requests in dasd_generic_requeue_all_requests()
3904 /* remove requests from device and block queue */ in dasd_generic_requeue_all_requests()
3928 * and go back to the device queue in dasd_generic_requeue_all_requests()
3932 spin_lock_irq(get_ccwdev_lock(device->cdev)); in dasd_generic_requeue_all_requests()
3933 list_splice_tail(&requeue_queue, &device->ccw_queue); in dasd_generic_requeue_all_requests()
3934 spin_unlock_irq(get_ccwdev_lock(device->cdev)); in dasd_generic_requeue_all_requests()
3936 dasd_schedule_device_bh(device); in dasd_generic_requeue_all_requests()
3943 struct dasd_device *device = container_of(work, struct dasd_device, in do_requeue_requests() local
3945 dasd_generic_requeue_all_requests(device); in do_requeue_requests()
3946 dasd_device_remove_stop_bits(device, DASD_STOPPED_NOT_ACC); in do_requeue_requests()
3947 if (device->block) in do_requeue_requests()
3948 dasd_schedule_block_bh(device->block); in do_requeue_requests()
3949 dasd_put_device(device); in do_requeue_requests()
3952 void dasd_schedule_requeue(struct dasd_device *device) in dasd_schedule_requeue() argument
3954 dasd_get_device(device); in dasd_schedule_requeue()
3956 if (!schedule_work(&device->requeue_requests)) in dasd_schedule_requeue()
3957 dasd_put_device(device); in dasd_schedule_requeue()
3961 static struct dasd_ccw_req *dasd_generic_build_rdc(struct dasd_device *device, in dasd_generic_build_rdc() argument
3968 cqr = dasd_smalloc_request(magic, 1 /* RDC */, rdc_buffer_size, device, in dasd_generic_build_rdc()
3973 dev_err(&device->cdev->dev, in dasd_generic_build_rdc()
3974 "An error occurred in the DASD device driver, " in dasd_generic_build_rdc()
3984 cqr->startdev = device; in dasd_generic_build_rdc()
3985 cqr->memdev = device; in dasd_generic_build_rdc()
3994 int dasd_generic_read_dev_chars(struct dasd_device *device, int magic, in dasd_generic_read_dev_chars() argument
4000 cqr = dasd_generic_build_rdc(device, rdc_buffer_size, magic); in dasd_generic_read_dev_chars()
4048 struct dasd_device *device; in dasd_generic_shutdown() local
4050 device = dasd_device_from_cdev(cdev); in dasd_generic_shutdown()
4051 if (IS_ERR(device)) in dasd_generic_shutdown()
4054 if (device->block) in dasd_generic_shutdown()
4055 dasd_schedule_block_bh(device->block); in dasd_generic_shutdown()
4057 dasd_schedule_device_bh(device); in dasd_generic_shutdown()
4059 wait_event(shutdown_waitq, _wait_for_empty_queues(device)); in dasd_generic_shutdown()
4107 pr_info("The DASD device driver could not be initialized\n"); in dasd_init()