1
2
3
4
5
6
7
8
9
10#ifndef DASD_INT_H
11#define DASD_INT_H
12
13
14#define DASD_PER_MAJOR (1U << (MINORBITS - DASD_PARTN_BITS))
15#define DASD_PARTN_MASK ((1 << DASD_PARTN_BITS) - 1)
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40#define DASD_STATE_NEW 0
41#define DASD_STATE_KNOWN 1
42#define DASD_STATE_BASIC 2
43#define DASD_STATE_UNFMT 3
44#define DASD_STATE_READY 4
45#define DASD_STATE_ONLINE 5
46
47#include <linux/module.h>
48#include <linux/wait.h>
49#include <linux/blkdev.h>
50#include <linux/genhd.h>
51#include <linux/hdreg.h>
52#include <linux/interrupt.h>
53#include <linux/log2.h>
54#include <asm/ccwdev.h>
55#include <linux/workqueue.h>
56#include <asm/debug.h>
57#include <asm/dasd.h>
58#include <asm/idals.h>
59#include <linux/bitops.h>
60#include <linux/blk-mq.h>
61
62
63#define DASD_ECKD_MAGIC 0xC5C3D2C4
64#define DASD_DIAG_MAGIC 0xC4C9C1C7
65#define DASD_FBA_MAGIC 0xC6C2C140
66
67
68
69
70struct dasd_device;
71struct dasd_block;
72
73
74#define DASD_SENSE_BIT_0 0x80
75#define DASD_SENSE_BIT_1 0x40
76#define DASD_SENSE_BIT_2 0x20
77#define DASD_SENSE_BIT_3 0x10
78
79
80#define DASD_SIM_SENSE 0x0F
81#define DASD_SIM_MSG_TO_OP 0x03
82#define DASD_SIM_LOG 0x0C
83
84
85#define CDEV_NESTED_FIRST 1
86#define CDEV_NESTED_SECOND 2
87
88
89
90
91#define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \
92do { \
93 debug_sprintf_event(d_device->debug_area, \
94 d_level, \
95 d_str "\n", \
96 d_data); \
97} while(0)
98
99#define DBF_EVENT(d_level, d_str, d_data...)\
100do { \
101 debug_sprintf_event(dasd_debug_area, \
102 d_level,\
103 d_str "\n", \
104 d_data); \
105} while(0)
106
107#define DBF_EVENT_DEVID(d_level, d_cdev, d_str, d_data...) \
108do { \
109 struct ccw_dev_id __dev_id; \
110 ccw_device_get_id(d_cdev, &__dev_id); \
111 debug_sprintf_event(dasd_debug_area, \
112 d_level, \
113 "0.%x.%04x " d_str "\n", \
114 __dev_id.ssid, __dev_id.devno, d_data); \
115} while (0)
116
117
118#define ERRORLENGTH 30
119
120
121#define DBF_EMERG 0
122#define DBF_ALERT 1
123#define DBF_CRIT 2
124#define DBF_ERR 3
125#define DBF_WARNING 4
126#define DBF_NOTICE 5
127#define DBF_INFO 6
128#define DBF_DEBUG 6
129
130
131#define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\
132do { \
133 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
134 dev_name(&d_device->cdev->dev), d_args); \
135 DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \
136} while(0)
137
138#define MESSAGE(d_loglevel,d_string,d_args...)\
139do { \
140 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
141 DBF_EVENT(DBF_ALERT, d_string, d_args); \
142} while(0)
143
144
145#define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\
146do { \
147 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
148 dev_name(&d_device->cdev->dev), d_args); \
149} while(0)
150
151#define MESSAGE_LOG(d_loglevel,d_string,d_args...)\
152do { \
153 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
154} while(0)
155
156
157#define BLOCKS_PER_PAGE(blksize) (PAGE_SIZE / blksize)
158
159struct dasd_ccw_req {
160 unsigned int magic;
161 int intrc;
162 struct list_head devlist;
163 struct list_head blocklist;
164 struct dasd_block *block;
165 struct dasd_device *memdev;
166 struct dasd_device *startdev;
167 struct dasd_device *basedev;
168 void *cpaddr;
169 short retries;
170 unsigned char cpmode;
171 char status;
172 char lpm;
173 unsigned long flags;
174 struct dasd_queue *dq;
175 unsigned long starttime;
176 unsigned long expires;
177 void *data;
178 struct irb irb;
179 struct dasd_ccw_req *refers;
180 void *function;
181 void *mem_chunk;
182
183 unsigned long buildclk;
184 unsigned long startclk;
185 unsigned long stopclk;
186 unsigned long endclk;
187
188 void (*callback)(struct dasd_ccw_req *, void *data);
189 void *callback_data;
190 unsigned int proc_bytes;
191};
192
193
194
195
196#define DASD_CQR_FILLED 0x00
197#define DASD_CQR_DONE 0x01
198#define DASD_CQR_NEED_ERP 0x02
199#define DASD_CQR_IN_ERP 0x03
200#define DASD_CQR_FAILED 0x04
201#define DASD_CQR_TERMINATED 0x05
202
203#define DASD_CQR_QUEUED 0x80
204#define DASD_CQR_IN_IO 0x81
205#define DASD_CQR_ERROR 0x82
206#define DASD_CQR_CLEAR_PENDING 0x83
207#define DASD_CQR_CLEARED 0x84
208#define DASD_CQR_SUCCESS 0x85
209
210
211#define DASD_EXPIRES 300
212#define DASD_EXPIRES_MAX 40000000
213#define DASD_RETRIES 256
214#define DASD_RETRIES_MAX 32768
215
216
217#define DASD_CQR_FLAGS_USE_ERP 0
218#define DASD_CQR_FLAGS_FAILFAST 1
219#define DASD_CQR_VERIFY_PATH 2
220#define DASD_CQR_ALLOW_SLOCK 3
221
222
223
224
225
226
227#define DASD_CQR_SUPPRESS_NRF 4
228#define DASD_CQR_SUPPRESS_FP 5
229#define DASD_CQR_SUPPRESS_IL 6
230#define DASD_CQR_SUPPRESS_CR 7
231
232#define DASD_REQ_PER_DEV 4
233
234
235typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *);
236
237
238
239
240
241
242#define DASD_CQR_MAX_CCW 255
243
244
245
246
247#define UA_NOT_CONFIGURED 0x00
248#define UA_BASE_DEVICE 0x01
249#define UA_BASE_PAV_ALIAS 0x02
250#define UA_HYPER_PAV_ALIAS 0x03
251
252struct dasd_uid {
253 __u8 type;
254 char vendor[4];
255 char serial[15];
256 __u16 ssid;
257 __u8 real_unit_addr;
258 __u8 base_unit_addr;
259 char vduit[33];
260};
261
262
263
264
265
266
267
268struct dasd_discipline {
269 struct module *owner;
270 char ebcname[8];
271 char name[8];
272
273 struct list_head list;
274
275
276
277
278
279
280
281
282 int (*check_device) (struct dasd_device *);
283 void (*uncheck_device) (struct dasd_device *);
284
285
286
287
288
289
290
291
292 int (*do_analysis) (struct dasd_block *);
293
294
295
296
297
298
299
300 int (*verify_path)(struct dasd_device *, __u8);
301
302
303
304
305
306 int (*basic_to_ready) (struct dasd_device *);
307 int (*online_to_ready) (struct dasd_device *);
308 int (*basic_to_known)(struct dasd_device *);
309
310
311
312
313 void (*setup_blk_queue)(struct dasd_block *);
314
315
316
317
318
319
320
321
322
323 struct dasd_ccw_req *(*build_cp) (struct dasd_device *,
324 struct dasd_block *,
325 struct request *);
326 int (*start_IO) (struct dasd_ccw_req *);
327 int (*term_IO) (struct dasd_ccw_req *);
328 void (*handle_terminated_request) (struct dasd_ccw_req *);
329 int (*format_device) (struct dasd_device *,
330 struct format_data_t *, int);
331 int (*check_device_format)(struct dasd_device *,
332 struct format_check_t *, int);
333 int (*free_cp) (struct dasd_ccw_req *, struct request *);
334
335
336
337
338
339
340
341
342
343
344 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *);
345 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *);
346 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *,
347 struct irb *);
348 void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *);
349 void (*check_for_device_change) (struct dasd_device *,
350 struct dasd_ccw_req *,
351 struct irb *);
352
353
354 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *);
355 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *);
356 int (*ioctl) (struct dasd_block *, unsigned int, void __user *);
357
358
359 int (*freeze) (struct dasd_device *);
360 int (*restore) (struct dasd_device *);
361
362
363 int (*reload) (struct dasd_device *);
364
365 int (*get_uid) (struct dasd_device *, struct dasd_uid *);
366 void (*kick_validate) (struct dasd_device *);
367 int (*check_attention)(struct dasd_device *, __u8);
368 int (*host_access_count)(struct dasd_device *);
369 int (*hosts_print)(struct dasd_device *, struct seq_file *);
370 void (*handle_hpf_error)(struct dasd_device *, struct irb *);
371 void (*disable_hpf)(struct dasd_device *);
372 int (*hpf_enabled)(struct dasd_device *);
373 void (*reset_path)(struct dasd_device *, __u8);
374
375
376
377
378 int (*is_ese)(struct dasd_device *);
379
380 int (*space_allocated)(struct dasd_device *);
381 int (*space_configured)(struct dasd_device *);
382 int (*logical_capacity)(struct dasd_device *);
383 int (*release_space)(struct dasd_device *, struct format_data_t *);
384
385 int (*ext_pool_id)(struct dasd_device *);
386 int (*ext_size)(struct dasd_device *);
387 int (*ext_pool_cap_at_warnlevel)(struct dasd_device *);
388 int (*ext_pool_warn_thrshld)(struct dasd_device *);
389 int (*ext_pool_oos)(struct dasd_device *);
390 int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *);
391 struct dasd_ccw_req *(*ese_format)(struct dasd_device *,
392 struct dasd_ccw_req *, struct irb *);
393 int (*ese_read)(struct dasd_ccw_req *, struct irb *);
394};
395
396extern struct dasd_discipline *dasd_diag_discipline_pointer;
397
398
399
400
401
402
403
404
405#define DASD_EER_DISABLE 0
406#define DASD_EER_TRIGGER 1
407
408
409#define DASD_EER_FATALERROR 1
410#define DASD_EER_NOPATH 2
411#define DASD_EER_STATECHANGE 3
412#define DASD_EER_PPRCSUSPEND 4
413#define DASD_EER_NOSPC 5
414
415
416
417#define DASD_PATH_OPERATIONAL 1
418#define DASD_PATH_TBV 2
419#define DASD_PATH_PP 3
420#define DASD_PATH_NPP 4
421#define DASD_PATH_MISCABLED 5
422#define DASD_PATH_NOHPF 6
423#define DASD_PATH_CUIR 7
424#define DASD_PATH_IFCC 8
425
426#define DASD_THRHLD_MAX 4294967295U
427#define DASD_INTERVAL_MAX 4294967295U
428
429struct dasd_path {
430 unsigned long flags;
431 u8 cssid;
432 u8 ssid;
433 u8 chpid;
434 struct dasd_conf_data *conf_data;
435 atomic_t error_count;
436 unsigned long errorclk;
437};
438
439
440struct dasd_profile_info {
441
442 unsigned int dasd_io_reqs;
443 unsigned int dasd_io_sects;
444 unsigned int dasd_io_secs[32];
445 unsigned int dasd_io_times[32];
446 unsigned int dasd_io_timps[32];
447 unsigned int dasd_io_time1[32];
448 unsigned int dasd_io_time2[32];
449 unsigned int dasd_io_time2ps[32];
450 unsigned int dasd_io_time3[32];
451 unsigned int dasd_io_nr_req[32];
452
453
454 struct timespec64 starttod;
455 unsigned int dasd_io_alias;
456 unsigned int dasd_io_tpm;
457 unsigned int dasd_read_reqs;
458 unsigned int dasd_read_sects;
459 unsigned int dasd_read_alias;
460 unsigned int dasd_read_tpm;
461 unsigned int dasd_read_secs[32];
462 unsigned int dasd_read_times[32];
463 unsigned int dasd_read_time1[32];
464 unsigned int dasd_read_time2[32];
465 unsigned int dasd_read_time3[32];
466 unsigned int dasd_read_nr_req[32];
467 unsigned long dasd_sum_times;
468 unsigned long dasd_sum_time_str;
469 unsigned long dasd_sum_time_irq;
470 unsigned long dasd_sum_time_end;
471};
472
473struct dasd_profile {
474 struct dentry *dentry;
475 struct dasd_profile_info *data;
476 spinlock_t lock;
477};
478
479struct dasd_format_entry {
480 struct list_head list;
481 sector_t track;
482};
483
484struct dasd_device {
485
486 struct dasd_block *block;
487
488 unsigned int devindex;
489 unsigned long flags;
490 unsigned short features;
491
492
493 struct dasd_ccw_req *eer_cqr;
494
495
496 struct dasd_discipline *discipline;
497 struct dasd_discipline *base_discipline;
498 void *private;
499 struct dasd_path path[8];
500 __u8 opm;
501
502
503 int state, target;
504 struct mutex state_mutex;
505 int stopped;
506
507
508 atomic_t ref_count;
509
510
511 struct list_head ccw_queue;
512 spinlock_t mem_lock;
513 void *ccw_mem;
514 void *erp_mem;
515 void *ese_mem;
516 struct list_head ccw_chunks;
517 struct list_head erp_chunks;
518 struct list_head ese_chunks;
519
520 atomic_t tasklet_scheduled;
521 struct tasklet_struct tasklet;
522 struct work_struct kick_work;
523 struct work_struct restore_device;
524 struct work_struct reload_device;
525 struct work_struct kick_validate;
526 struct work_struct suc_work;
527 struct work_struct requeue_requests;
528 struct timer_list timer;
529
530 debug_info_t *debug_area;
531
532 struct ccw_device *cdev;
533
534
535 struct list_head alias_list;
536
537
538 unsigned long default_expires;
539 unsigned long default_retries;
540
541 unsigned long blk_timeout;
542
543 unsigned long path_thrhld;
544 unsigned long path_interval;
545
546 struct dentry *debugfs_dentry;
547 struct dentry *hosts_dentry;
548 struct dasd_profile profile;
549 struct dasd_format_entry format_entry;
550};
551
552struct dasd_block {
553
554 struct gendisk *gdp;
555 struct request_queue *request_queue;
556 spinlock_t request_queue_lock;
557 struct blk_mq_tag_set tag_set;
558 struct block_device *bdev;
559 atomic_t open_count;
560
561 unsigned long blocks;
562 unsigned int bp_block;
563 unsigned int s2b_shift;
564
565 struct dasd_device *base;
566 struct list_head ccw_queue;
567 spinlock_t queue_lock;
568
569 atomic_t tasklet_scheduled;
570 struct tasklet_struct tasklet;
571 struct timer_list timer;
572
573 struct dentry *debugfs_dentry;
574 struct dasd_profile profile;
575
576 struct list_head format_list;
577 spinlock_t format_lock;
578};
579
580struct dasd_attention_data {
581 struct dasd_device *device;
582 __u8 lpum;
583};
584
585struct dasd_queue {
586 spinlock_t lock;
587};
588
589
590#define DASD_STOPPED_NOT_ACC 1
591#define DASD_STOPPED_QUIESCE 2
592#define DASD_STOPPED_PENDING 4
593#define DASD_STOPPED_DC_WAIT 8
594#define DASD_STOPPED_SU 16
595#define DASD_STOPPED_PM 32
596#define DASD_UNRESUMED_PM 64
597#define DASD_STOPPED_NOSPC 128
598
599
600#define DASD_FLAG_OFFLINE 3
601#define DASD_FLAG_EER_SNSS 4
602#define DASD_FLAG_EER_IN_USE 5
603#define DASD_FLAG_DEVICE_RO 6
604
605
606
607#define DASD_FLAG_IS_RESERVED 7
608#define DASD_FLAG_LOCK_STOLEN 8
609#define DASD_FLAG_SUSPENDED 9
610#define DASD_FLAG_SAFE_OFFLINE 10
611#define DASD_FLAG_SAFE_OFFLINE_RUNNING 11
612#define DASD_FLAG_ABORTALL 12
613#define DASD_FLAG_PATH_VERIFY 13
614#define DASD_FLAG_SUC 14
615
616#define DASD_SLEEPON_START_TAG ((void *) 1)
617#define DASD_SLEEPON_END_TAG ((void *) 2)
618
619void dasd_put_device_wake(struct dasd_device *);
620
621
622
623
624static inline void
625dasd_get_device(struct dasd_device *device)
626{
627 atomic_inc(&device->ref_count);
628}
629
630static inline void
631dasd_put_device(struct dasd_device *device)
632{
633 if (atomic_dec_return(&device->ref_count) == 0)
634 dasd_put_device_wake(device);
635}
636
637
638
639
640
641struct dasd_mchunk
642{
643 struct list_head list;
644 unsigned long size;
645} __attribute__ ((aligned(8)));
646
647static inline void
648dasd_init_chunklist(struct list_head *chunk_list, void *mem,
649 unsigned long size)
650{
651 struct dasd_mchunk *chunk;
652
653 INIT_LIST_HEAD(chunk_list);
654 chunk = (struct dasd_mchunk *) mem;
655 chunk->size = size - sizeof(struct dasd_mchunk);
656 list_add(&chunk->list, chunk_list);
657}
658
659static inline void *
660dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size)
661{
662 struct dasd_mchunk *chunk, *tmp;
663
664 size = (size + 7L) & -8L;
665 list_for_each_entry(chunk, chunk_list, list) {
666 if (chunk->size < size)
667 continue;
668 if (chunk->size > size + sizeof(struct dasd_mchunk)) {
669 char *endaddr = (char *) (chunk + 1) + chunk->size;
670 tmp = (struct dasd_mchunk *) (endaddr - size) - 1;
671 tmp->size = size;
672 chunk->size -= size + sizeof(struct dasd_mchunk);
673 chunk = tmp;
674 } else
675 list_del(&chunk->list);
676 return (void *) (chunk + 1);
677 }
678 return NULL;
679}
680
681static inline void
682dasd_free_chunk(struct list_head *chunk_list, void *mem)
683{
684 struct dasd_mchunk *chunk, *tmp;
685 struct list_head *p, *left;
686
687 chunk = (struct dasd_mchunk *)
688 ((char *) mem - sizeof(struct dasd_mchunk));
689
690 left = chunk_list;
691 list_for_each(p, chunk_list) {
692 if (list_entry(p, struct dasd_mchunk, list) > chunk)
693 break;
694 left = p;
695 }
696
697 if (left->next != chunk_list) {
698 tmp = list_entry(left->next, struct dasd_mchunk, list);
699 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) {
700 list_del(&tmp->list);
701 chunk->size += tmp->size + sizeof(struct dasd_mchunk);
702 }
703 }
704
705 if (left != chunk_list) {
706 tmp = list_entry(left, struct dasd_mchunk, list);
707 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) {
708 tmp->size += chunk->size + sizeof(struct dasd_mchunk);
709 return;
710 }
711 }
712 __list_add(&chunk->list, left, left->next);
713}
714
715
716
717
718static inline int
719dasd_check_blocksize(int bsize)
720{
721 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize))
722 return -EMEDIUMTYPE;
723 return 0;
724}
725
726
727#define DASD_PROFILE_OFF 0
728#define DASD_PROFILE_ON 1
729#define DASD_PROFILE_GLOBAL_ONLY 2
730
731extern debug_info_t *dasd_debug_area;
732extern struct dasd_profile dasd_global_profile;
733extern unsigned int dasd_global_profile_level;
734extern const struct block_device_operations dasd_device_operations;
735
736extern struct kmem_cache *dasd_page_cache;
737
738struct dasd_ccw_req *
739dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *);
740struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *);
741void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *);
742void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *);
743void dasd_wakeup_cb(struct dasd_ccw_req *, void *);
744
745struct dasd_device *dasd_alloc_device(void);
746void dasd_free_device(struct dasd_device *);
747
748struct dasd_block *dasd_alloc_block(void);
749void dasd_free_block(struct dasd_block *);
750
751enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved);
752
753void dasd_enable_device(struct dasd_device *);
754void dasd_set_target_state(struct dasd_device *, int);
755void dasd_kick_device(struct dasd_device *);
756void dasd_restore_device(struct dasd_device *);
757void dasd_reload_device(struct dasd_device *);
758void dasd_schedule_requeue(struct dasd_device *);
759
760void dasd_add_request_head(struct dasd_ccw_req *);
761void dasd_add_request_tail(struct dasd_ccw_req *);
762int dasd_start_IO(struct dasd_ccw_req *);
763int dasd_term_IO(struct dasd_ccw_req *);
764void dasd_schedule_device_bh(struct dasd_device *);
765void dasd_schedule_block_bh(struct dasd_block *);
766int dasd_sleep_on(struct dasd_ccw_req *);
767int dasd_sleep_on_queue(struct list_head *);
768int dasd_sleep_on_immediatly(struct dasd_ccw_req *);
769int dasd_sleep_on_queue_interruptible(struct list_head *);
770int dasd_sleep_on_interruptible(struct dasd_ccw_req *);
771void dasd_device_set_timer(struct dasd_device *, int);
772void dasd_device_clear_timer(struct dasd_device *);
773void dasd_block_set_timer(struct dasd_block *, int);
774void dasd_block_clear_timer(struct dasd_block *);
775int dasd_cancel_req(struct dasd_ccw_req *);
776int dasd_flush_device_queue(struct dasd_device *);
777int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *);
778void dasd_generic_free_discipline(struct dasd_device *);
779void dasd_generic_remove (struct ccw_device *cdev);
780int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *);
781int dasd_generic_set_offline (struct ccw_device *cdev);
782int dasd_generic_notify(struct ccw_device *, int);
783int dasd_generic_last_path_gone(struct dasd_device *);
784int dasd_generic_path_operational(struct dasd_device *);
785void dasd_generic_shutdown(struct ccw_device *);
786
787void dasd_generic_handle_state_change(struct dasd_device *);
788int dasd_generic_pm_freeze(struct ccw_device *);
789int dasd_generic_restore_device(struct ccw_device *);
790enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *);
791void dasd_generic_path_event(struct ccw_device *, int *);
792int dasd_generic_verify_path(struct dasd_device *, __u8);
793void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *);
794void dasd_generic_space_avail(struct dasd_device *);
795
796int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int);
797char *dasd_get_sense(struct irb *);
798
799void dasd_device_set_stop_bits(struct dasd_device *, int);
800void dasd_device_remove_stop_bits(struct dasd_device *, int);
801
802int dasd_device_is_ro(struct dasd_device *);
803
804void dasd_profile_reset(struct dasd_profile *);
805int dasd_profile_on(struct dasd_profile *);
806void dasd_profile_off(struct dasd_profile *);
807char *dasd_get_user_string(const char __user *, size_t);
808
809
810extern int dasd_max_devindex;
811extern int dasd_probeonly;
812extern int dasd_autodetect;
813extern int dasd_nopav;
814extern int dasd_nofcx;
815
816int dasd_devmap_init(void);
817void dasd_devmap_exit(void);
818
819struct dasd_device *dasd_create_device(struct ccw_device *);
820void dasd_delete_device(struct dasd_device *);
821
822int dasd_get_feature(struct ccw_device *, int);
823int dasd_set_feature(struct ccw_device *, int, int);
824
825int dasd_add_sysfs_files(struct ccw_device *);
826void dasd_remove_sysfs_files(struct ccw_device *);
827
828struct dasd_device *dasd_device_from_cdev(struct ccw_device *);
829struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *);
830struct dasd_device *dasd_device_from_devindex(int);
831
832void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *);
833struct dasd_device *dasd_device_from_gendisk(struct gendisk *);
834
835int dasd_parse(void) __init;
836int dasd_busid_known(const char *);
837
838
839int dasd_gendisk_init(void);
840void dasd_gendisk_exit(void);
841int dasd_gendisk_alloc(struct dasd_block *);
842void dasd_gendisk_free(struct dasd_block *);
843int dasd_scan_partitions(struct dasd_block *);
844void dasd_destroy_partitions(struct dasd_block *);
845
846
847int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long);
848
849
850int dasd_proc_init(void);
851void dasd_proc_exit(void);
852
853
854struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *);
855struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *);
856struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int,
857 struct dasd_device *);
858void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *);
859void dasd_log_sense(struct dasd_ccw_req *, struct irb *);
860void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb);
861
862
863struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *);
864void dasd_3990_erp_handle_sim(struct dasd_device *, char *);
865
866
867#ifdef CONFIG_DASD_EER
868int dasd_eer_init(void);
869void dasd_eer_exit(void);
870int dasd_eer_enable(struct dasd_device *);
871void dasd_eer_disable(struct dasd_device *);
872void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr,
873 unsigned int id);
874void dasd_eer_snss(struct dasd_device *);
875
876static inline int dasd_eer_enabled(struct dasd_device *device)
877{
878 return device->eer_cqr != NULL;
879}
880#else
881#define dasd_eer_init() (0)
882#define dasd_eer_exit() do { } while (0)
883#define dasd_eer_enable(d) (0)
884#define dasd_eer_disable(d) do { } while (0)
885#define dasd_eer_write(d,c,i) do { } while (0)
886#define dasd_eer_snss(d) do { } while (0)
887#define dasd_eer_enabled(d) (0)
888#endif
889
890
891
892
893
894
895
896static inline int dasd_path_is_operational(struct dasd_device *device, int chp)
897{
898 return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
899}
900
901static inline int dasd_path_need_verify(struct dasd_device *device, int chp)
902{
903 return test_bit(DASD_PATH_TBV, &device->path[chp].flags);
904}
905
906static inline void dasd_path_verify(struct dasd_device *device, int chp)
907{
908 __set_bit(DASD_PATH_TBV, &device->path[chp].flags);
909}
910
911static inline void dasd_path_clear_verify(struct dasd_device *device, int chp)
912{
913 __clear_bit(DASD_PATH_TBV, &device->path[chp].flags);
914}
915
916static inline void dasd_path_clear_all_verify(struct dasd_device *device)
917{
918 int chp;
919
920 for (chp = 0; chp < 8; chp++)
921 dasd_path_clear_verify(device, chp);
922}
923
924static inline void dasd_path_operational(struct dasd_device *device, int chp)
925{
926 __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
927 device->opm |= (0x80 >> chp);
928}
929
930static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp)
931{
932 __set_bit(DASD_PATH_NPP, &device->path[chp].flags);
933}
934
935static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp)
936{
937 return test_bit(DASD_PATH_NPP, &device->path[chp].flags);
938}
939
940static inline void dasd_path_clear_nonpreferred(struct dasd_device *device,
941 int chp)
942{
943 __clear_bit(DASD_PATH_NPP, &device->path[chp].flags);
944}
945
946static inline void dasd_path_preferred(struct dasd_device *device, int chp)
947{
948 __set_bit(DASD_PATH_PP, &device->path[chp].flags);
949}
950
951static inline int dasd_path_is_preferred(struct dasd_device *device, int chp)
952{
953 return test_bit(DASD_PATH_PP, &device->path[chp].flags);
954}
955
956static inline void dasd_path_clear_preferred(struct dasd_device *device,
957 int chp)
958{
959 __clear_bit(DASD_PATH_PP, &device->path[chp].flags);
960}
961
962static inline void dasd_path_clear_oper(struct dasd_device *device, int chp)
963{
964 __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
965 device->opm &= ~(0x80 >> chp);
966}
967
968static inline void dasd_path_clear_cable(struct dasd_device *device, int chp)
969{
970 __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
971}
972
973static inline void dasd_path_cuir(struct dasd_device *device, int chp)
974{
975 __set_bit(DASD_PATH_CUIR, &device->path[chp].flags);
976}
977
978static inline int dasd_path_is_cuir(struct dasd_device *device, int chp)
979{
980 return test_bit(DASD_PATH_CUIR, &device->path[chp].flags);
981}
982
983static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp)
984{
985 __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags);
986}
987
988static inline void dasd_path_ifcc(struct dasd_device *device, int chp)
989{
990 set_bit(DASD_PATH_IFCC, &device->path[chp].flags);
991}
992
993static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp)
994{
995 return test_bit(DASD_PATH_IFCC, &device->path[chp].flags);
996}
997
998static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp)
999{
1000 clear_bit(DASD_PATH_IFCC, &device->path[chp].flags);
1001}
1002
1003static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp)
1004{
1005 __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
1006}
1007
1008static inline void dasd_path_miscabled(struct dasd_device *device, int chp)
1009{
1010 __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
1011}
1012
1013static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp)
1014{
1015 return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
1016}
1017
1018static inline void dasd_path_nohpf(struct dasd_device *device, int chp)
1019{
1020 __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
1021}
1022
1023static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp)
1024{
1025 return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
1026}
1027
1028
1029
1030
1031
1032
1033static inline __u8 dasd_path_get_opm(struct dasd_device *device)
1034{
1035 return device->opm;
1036}
1037
1038static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device)
1039{
1040 int chp;
1041 __u8 tbvpm = 0x00;
1042
1043 for (chp = 0; chp < 8; chp++)
1044 if (dasd_path_need_verify(device, chp))
1045 tbvpm |= 0x80 >> chp;
1046 return tbvpm;
1047}
1048
1049static inline __u8 dasd_path_get_nppm(struct dasd_device *device)
1050{
1051 int chp;
1052 __u8 npm = 0x00;
1053
1054 for (chp = 0; chp < 8; chp++) {
1055 if (dasd_path_is_nonpreferred(device, chp))
1056 npm |= 0x80 >> chp;
1057 }
1058 return npm;
1059}
1060
1061static inline __u8 dasd_path_get_ppm(struct dasd_device *device)
1062{
1063 int chp;
1064 __u8 ppm = 0x00;
1065
1066 for (chp = 0; chp < 8; chp++)
1067 if (dasd_path_is_preferred(device, chp))
1068 ppm |= 0x80 >> chp;
1069 return ppm;
1070}
1071
1072static inline __u8 dasd_path_get_cablepm(struct dasd_device *device)
1073{
1074 int chp;
1075 __u8 cablepm = 0x00;
1076
1077 for (chp = 0; chp < 8; chp++)
1078 if (dasd_path_is_miscabled(device, chp))
1079 cablepm |= 0x80 >> chp;
1080 return cablepm;
1081}
1082
1083static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device)
1084{
1085 int chp;
1086 __u8 cuirpm = 0x00;
1087
1088 for (chp = 0; chp < 8; chp++)
1089 if (dasd_path_is_cuir(device, chp))
1090 cuirpm |= 0x80 >> chp;
1091 return cuirpm;
1092}
1093
1094static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device)
1095{
1096 int chp;
1097 __u8 ifccpm = 0x00;
1098
1099 for (chp = 0; chp < 8; chp++)
1100 if (dasd_path_is_ifcc(device, chp))
1101 ifccpm |= 0x80 >> chp;
1102 return ifccpm;
1103}
1104
1105static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device)
1106{
1107 int chp;
1108 __u8 hpfpm = 0x00;
1109
1110 for (chp = 0; chp < 8; chp++)
1111 if (dasd_path_is_nohpf(device, chp))
1112 hpfpm |= 0x80 >> chp;
1113 return hpfpm;
1114}
1115
1116
1117
1118
1119
1120static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm)
1121{
1122 int chp;
1123
1124 for (chp = 0; chp < 8; chp++)
1125 if (pm & (0x80 >> chp))
1126 dasd_path_verify(device, chp);
1127}
1128
1129static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device)
1130{
1131 int chp;
1132 __u8 nopm = 0x00;
1133
1134 for (chp = 0; chp < 8; chp++)
1135 if (dasd_path_is_nohpf(device, chp) ||
1136 dasd_path_is_ifcc(device, chp) ||
1137 dasd_path_is_cuir(device, chp) ||
1138 dasd_path_is_miscabled(device, chp))
1139 nopm |= 0x80 >> chp;
1140 return nopm;
1141}
1142
1143static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm)
1144{
1145 int chp;
1146
1147 for (chp = 0; chp < 8; chp++)
1148 if (pm & (0x80 >> chp)) {
1149 dasd_path_operational(device, chp);
1150
1151
1152
1153
1154 dasd_path_clear_nohpf(device, chp);
1155 dasd_path_clear_cuir(device, chp);
1156 dasd_path_clear_cable(device, chp);
1157 dasd_path_clear_ifcc(device, chp);
1158 }
1159}
1160
1161static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm)
1162{
1163 int chp;
1164
1165 for (chp = 0; chp < 8; chp++)
1166 if (pm & (0x80 >> chp))
1167 dasd_path_miscabled(device, chp);
1168}
1169
1170static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm)
1171{
1172 int chp;
1173
1174 for (chp = 0; chp < 8; chp++)
1175 if (pm & (0x80 >> chp))
1176 dasd_path_cuir(device, chp);
1177}
1178
1179static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm)
1180{
1181 int chp;
1182
1183 for (chp = 0; chp < 8; chp++)
1184 if (pm & (0x80 >> chp))
1185 dasd_path_ifcc(device, chp);
1186}
1187
1188static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm)
1189{
1190 int chp;
1191
1192 for (chp = 0; chp < 8; chp++)
1193 if (pm & (0x80 >> chp))
1194 dasd_path_nonpreferred(device, chp);
1195}
1196
1197static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm)
1198{
1199 int chp;
1200
1201 for (chp = 0; chp < 8; chp++)
1202 if (pm & (0x80 >> chp))
1203 dasd_path_nohpf(device, chp);
1204}
1205
1206static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm)
1207{
1208 int chp;
1209
1210 for (chp = 0; chp < 8; chp++)
1211 if (pm & (0x80 >> chp))
1212 dasd_path_preferred(device, chp);
1213}
1214
1215
1216
1217
1218
1219static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm)
1220{
1221 int chp;
1222
1223 for (chp = 0; chp < 8; chp++)
1224 if (pm & (0x80 >> chp))
1225 dasd_path_verify(device, chp);
1226 else
1227 dasd_path_clear_verify(device, chp);
1228}
1229
1230static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm)
1231{
1232 int chp;
1233
1234 for (chp = 0; chp < 8; chp++) {
1235 dasd_path_clear_oper(device, chp);
1236 if (pm & (0x80 >> chp)) {
1237 dasd_path_operational(device, chp);
1238
1239
1240
1241
1242 dasd_path_clear_nohpf(device, chp);
1243 dasd_path_clear_cuir(device, chp);
1244 dasd_path_clear_cable(device, chp);
1245 dasd_path_clear_ifcc(device, chp);
1246 }
1247 }
1248}
1249
1250
1251
1252
1253
1254static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm)
1255{
1256 int chp;
1257
1258 for (chp = 0; chp < 8; chp++) {
1259 if (pm & (0x80 >> chp))
1260 dasd_path_clear_oper(device, chp);
1261 }
1262}
1263
1264
1265
1266
1267
1268static inline void dasd_path_available(struct dasd_device *device, int chp)
1269{
1270 dasd_path_clear_oper(device, chp);
1271 dasd_path_verify(device, chp);
1272}
1273
1274static inline void dasd_path_notoper(struct dasd_device *device, int chp)
1275{
1276 dasd_path_clear_oper(device, chp);
1277 dasd_path_clear_preferred(device, chp);
1278 dasd_path_clear_nonpreferred(device, chp);
1279}
1280
1281
1282
1283
1284static inline void dasd_path_no_path(struct dasd_device *device)
1285{
1286 int chp;
1287
1288 for (chp = 0; chp < 8; chp++)
1289 dasd_path_notoper(device, chp);
1290
1291 dasd_path_clear_all_verify(device);
1292}
1293
1294
1295
1296#endif
1297