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 (*pe_handler)(struct dasd_device *, __u8, __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 (*reload) (struct dasd_device *);
360
361 int (*get_uid) (struct dasd_device *, struct dasd_uid *);
362 void (*kick_validate) (struct dasd_device *);
363 int (*check_attention)(struct dasd_device *, __u8);
364 int (*host_access_count)(struct dasd_device *);
365 int (*hosts_print)(struct dasd_device *, struct seq_file *);
366 void (*handle_hpf_error)(struct dasd_device *, struct irb *);
367 void (*disable_hpf)(struct dasd_device *);
368 int (*hpf_enabled)(struct dasd_device *);
369 void (*reset_path)(struct dasd_device *, __u8);
370
371
372
373
374 int (*is_ese)(struct dasd_device *);
375
376 int (*space_allocated)(struct dasd_device *);
377 int (*space_configured)(struct dasd_device *);
378 int (*logical_capacity)(struct dasd_device *);
379 int (*release_space)(struct dasd_device *, struct format_data_t *);
380
381 int (*ext_pool_id)(struct dasd_device *);
382 int (*ext_size)(struct dasd_device *);
383 int (*ext_pool_cap_at_warnlevel)(struct dasd_device *);
384 int (*ext_pool_warn_thrshld)(struct dasd_device *);
385 int (*ext_pool_oos)(struct dasd_device *);
386 int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *);
387 struct dasd_ccw_req *(*ese_format)(struct dasd_device *,
388 struct dasd_ccw_req *, struct irb *);
389 int (*ese_read)(struct dasd_ccw_req *, struct irb *);
390};
391
392extern struct dasd_discipline *dasd_diag_discipline_pointer;
393
394
395
396
397
398
399
400
401#define DASD_EER_DISABLE 0
402#define DASD_EER_TRIGGER 1
403
404
405#define DASD_EER_FATALERROR 1
406#define DASD_EER_NOPATH 2
407#define DASD_EER_STATECHANGE 3
408#define DASD_EER_PPRCSUSPEND 4
409#define DASD_EER_NOSPC 5
410
411
412
413#define DASD_PATH_OPERATIONAL 1
414#define DASD_PATH_TBV 2
415#define DASD_PATH_PP 3
416#define DASD_PATH_NPP 4
417#define DASD_PATH_MISCABLED 5
418#define DASD_PATH_NOHPF 6
419#define DASD_PATH_CUIR 7
420#define DASD_PATH_IFCC 8
421#define DASD_PATH_FCSEC 9
422
423#define DASD_THRHLD_MAX 4294967295U
424#define DASD_INTERVAL_MAX 4294967295U
425
426
427#define DASD_FC_SECURITY_UNSUP 0
428#define DASD_FC_SECURITY_AUTH 1
429#define DASD_FC_SECURITY_ENC_FCSP2 2
430#define DASD_FC_SECURITY_ENC_ERAS 3
431
432#define DASD_FC_SECURITY_ENC_STR "Encryption"
433static const struct {
434 u8 value;
435 char *name;
436} dasd_path_fcs_mnemonics[] = {
437 { DASD_FC_SECURITY_UNSUP, "Unsupported" },
438 { DASD_FC_SECURITY_AUTH, "Authentication" },
439 { DASD_FC_SECURITY_ENC_FCSP2, DASD_FC_SECURITY_ENC_STR },
440 { DASD_FC_SECURITY_ENC_ERAS, DASD_FC_SECURITY_ENC_STR },
441};
442
443static inline char *dasd_path_get_fcs_str(int val)
444{
445 int i;
446
447 for (i = 0; i < ARRAY_SIZE(dasd_path_fcs_mnemonics); i++) {
448 if (dasd_path_fcs_mnemonics[i].value == val)
449 return dasd_path_fcs_mnemonics[i].name;
450 }
451
452 return dasd_path_fcs_mnemonics[0].name;
453}
454
455struct dasd_path {
456 unsigned long flags;
457 u8 cssid;
458 u8 ssid;
459 u8 chpid;
460 struct dasd_conf_data *conf_data;
461 atomic_t error_count;
462 unsigned long errorclk;
463 u8 fc_security;
464 struct kobject kobj;
465 bool in_sysfs;
466};
467
468#define to_dasd_path(path) container_of(path, struct dasd_path, kobj)
469
470static inline void dasd_path_release(struct kobject *kobj)
471{
472
473}
474
475
476struct dasd_profile_info {
477
478 unsigned int dasd_io_reqs;
479 unsigned int dasd_io_sects;
480 unsigned int dasd_io_secs[32];
481 unsigned int dasd_io_times[32];
482 unsigned int dasd_io_timps[32];
483 unsigned int dasd_io_time1[32];
484 unsigned int dasd_io_time2[32];
485 unsigned int dasd_io_time2ps[32];
486 unsigned int dasd_io_time3[32];
487 unsigned int dasd_io_nr_req[32];
488
489
490 struct timespec64 starttod;
491 unsigned int dasd_io_alias;
492 unsigned int dasd_io_tpm;
493 unsigned int dasd_read_reqs;
494 unsigned int dasd_read_sects;
495 unsigned int dasd_read_alias;
496 unsigned int dasd_read_tpm;
497 unsigned int dasd_read_secs[32];
498 unsigned int dasd_read_times[32];
499 unsigned int dasd_read_time1[32];
500 unsigned int dasd_read_time2[32];
501 unsigned int dasd_read_time3[32];
502 unsigned int dasd_read_nr_req[32];
503 unsigned long dasd_sum_times;
504 unsigned long dasd_sum_time_str;
505 unsigned long dasd_sum_time_irq;
506 unsigned long dasd_sum_time_end;
507};
508
509struct dasd_profile {
510 struct dentry *dentry;
511 struct dasd_profile_info *data;
512 spinlock_t lock;
513};
514
515struct dasd_format_entry {
516 struct list_head list;
517 sector_t track;
518};
519
520struct dasd_device {
521
522 struct dasd_block *block;
523
524 unsigned int devindex;
525 unsigned long flags;
526 unsigned short features;
527
528
529 struct dasd_ccw_req *eer_cqr;
530
531
532 struct dasd_discipline *discipline;
533 struct dasd_discipline *base_discipline;
534 void *private;
535 struct dasd_path path[8];
536 __u8 opm;
537
538
539 int state, target;
540 struct mutex state_mutex;
541 int stopped;
542
543
544 atomic_t ref_count;
545
546
547 struct list_head ccw_queue;
548 spinlock_t mem_lock;
549 void *ccw_mem;
550 void *erp_mem;
551 void *ese_mem;
552 struct list_head ccw_chunks;
553 struct list_head erp_chunks;
554 struct list_head ese_chunks;
555
556 atomic_t tasklet_scheduled;
557 struct tasklet_struct tasklet;
558 struct work_struct kick_work;
559 struct work_struct reload_device;
560 struct work_struct kick_validate;
561 struct work_struct suc_work;
562 struct work_struct requeue_requests;
563 struct timer_list timer;
564
565 debug_info_t *debug_area;
566
567 struct ccw_device *cdev;
568
569
570 struct list_head alias_list;
571
572
573 unsigned long default_expires;
574 unsigned long default_retries;
575
576 unsigned long blk_timeout;
577
578 unsigned long path_thrhld;
579 unsigned long path_interval;
580
581 struct dentry *debugfs_dentry;
582 struct dentry *hosts_dentry;
583 struct dasd_profile profile;
584 struct dasd_format_entry format_entry;
585 struct kset *paths_info;
586};
587
588struct dasd_block {
589
590 struct gendisk *gdp;
591 struct request_queue *request_queue;
592 spinlock_t request_queue_lock;
593 struct blk_mq_tag_set tag_set;
594 struct block_device *bdev;
595 atomic_t open_count;
596
597 unsigned long blocks;
598 unsigned int bp_block;
599 unsigned int s2b_shift;
600
601 struct dasd_device *base;
602 struct list_head ccw_queue;
603 spinlock_t queue_lock;
604
605 atomic_t tasklet_scheduled;
606 struct tasklet_struct tasklet;
607 struct timer_list timer;
608
609 struct dentry *debugfs_dentry;
610 struct dasd_profile profile;
611
612 struct list_head format_list;
613 spinlock_t format_lock;
614};
615
616struct dasd_attention_data {
617 struct dasd_device *device;
618 __u8 lpum;
619};
620
621struct dasd_queue {
622 spinlock_t lock;
623};
624
625
626#define DASD_STOPPED_NOT_ACC 1
627#define DASD_STOPPED_QUIESCE 2
628#define DASD_STOPPED_PENDING 4
629#define DASD_STOPPED_DC_WAIT 8
630#define DASD_STOPPED_SU 16
631#define DASD_STOPPED_NOSPC 128
632
633
634#define DASD_FLAG_OFFLINE 3
635#define DASD_FLAG_EER_SNSS 4
636#define DASD_FLAG_EER_IN_USE 5
637#define DASD_FLAG_DEVICE_RO 6
638
639
640
641#define DASD_FLAG_IS_RESERVED 7
642#define DASD_FLAG_LOCK_STOLEN 8
643#define DASD_FLAG_SUSPENDED 9
644#define DASD_FLAG_SAFE_OFFLINE 10
645#define DASD_FLAG_SAFE_OFFLINE_RUNNING 11
646#define DASD_FLAG_ABORTALL 12
647#define DASD_FLAG_PATH_VERIFY 13
648#define DASD_FLAG_SUC 14
649
650#define DASD_SLEEPON_START_TAG ((void *) 1)
651#define DASD_SLEEPON_END_TAG ((void *) 2)
652
653void dasd_put_device_wake(struct dasd_device *);
654
655
656
657
658static inline void
659dasd_get_device(struct dasd_device *device)
660{
661 atomic_inc(&device->ref_count);
662}
663
664static inline void
665dasd_put_device(struct dasd_device *device)
666{
667 if (atomic_dec_return(&device->ref_count) == 0)
668 dasd_put_device_wake(device);
669}
670
671
672
673
674
675struct dasd_mchunk
676{
677 struct list_head list;
678 unsigned long size;
679} __attribute__ ((aligned(8)));
680
681static inline void
682dasd_init_chunklist(struct list_head *chunk_list, void *mem,
683 unsigned long size)
684{
685 struct dasd_mchunk *chunk;
686
687 INIT_LIST_HEAD(chunk_list);
688 chunk = (struct dasd_mchunk *) mem;
689 chunk->size = size - sizeof(struct dasd_mchunk);
690 list_add(&chunk->list, chunk_list);
691}
692
693static inline void *
694dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size)
695{
696 struct dasd_mchunk *chunk, *tmp;
697
698 size = (size + 7L) & -8L;
699 list_for_each_entry(chunk, chunk_list, list) {
700 if (chunk->size < size)
701 continue;
702 if (chunk->size > size + sizeof(struct dasd_mchunk)) {
703 char *endaddr = (char *) (chunk + 1) + chunk->size;
704 tmp = (struct dasd_mchunk *) (endaddr - size) - 1;
705 tmp->size = size;
706 chunk->size -= size + sizeof(struct dasd_mchunk);
707 chunk = tmp;
708 } else
709 list_del(&chunk->list);
710 return (void *) (chunk + 1);
711 }
712 return NULL;
713}
714
715static inline void
716dasd_free_chunk(struct list_head *chunk_list, void *mem)
717{
718 struct dasd_mchunk *chunk, *tmp;
719 struct list_head *p, *left;
720
721 chunk = (struct dasd_mchunk *)
722 ((char *) mem - sizeof(struct dasd_mchunk));
723
724 left = chunk_list;
725 list_for_each(p, chunk_list) {
726 if (list_entry(p, struct dasd_mchunk, list) > chunk)
727 break;
728 left = p;
729 }
730
731 if (left->next != chunk_list) {
732 tmp = list_entry(left->next, struct dasd_mchunk, list);
733 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) {
734 list_del(&tmp->list);
735 chunk->size += tmp->size + sizeof(struct dasd_mchunk);
736 }
737 }
738
739 if (left != chunk_list) {
740 tmp = list_entry(left, struct dasd_mchunk, list);
741 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) {
742 tmp->size += chunk->size + sizeof(struct dasd_mchunk);
743 return;
744 }
745 }
746 __list_add(&chunk->list, left, left->next);
747}
748
749
750
751
752static inline int
753dasd_check_blocksize(int bsize)
754{
755 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize))
756 return -EMEDIUMTYPE;
757 return 0;
758}
759
760
761#define DASD_PROFILE_OFF 0
762#define DASD_PROFILE_ON 1
763#define DASD_PROFILE_GLOBAL_ONLY 2
764
765extern debug_info_t *dasd_debug_area;
766extern struct dasd_profile dasd_global_profile;
767extern unsigned int dasd_global_profile_level;
768extern const struct block_device_operations dasd_device_operations;
769
770extern struct kmem_cache *dasd_page_cache;
771
772struct dasd_ccw_req *
773dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *);
774struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *);
775void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *);
776void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *);
777void dasd_wakeup_cb(struct dasd_ccw_req *, void *);
778
779struct dasd_device *dasd_alloc_device(void);
780void dasd_free_device(struct dasd_device *);
781
782struct dasd_block *dasd_alloc_block(void);
783void dasd_free_block(struct dasd_block *);
784
785enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved);
786
787void dasd_enable_device(struct dasd_device *);
788void dasd_set_target_state(struct dasd_device *, int);
789void dasd_kick_device(struct dasd_device *);
790void dasd_reload_device(struct dasd_device *);
791void dasd_schedule_requeue(struct dasd_device *);
792
793void dasd_add_request_head(struct dasd_ccw_req *);
794void dasd_add_request_tail(struct dasd_ccw_req *);
795int dasd_start_IO(struct dasd_ccw_req *);
796int dasd_term_IO(struct dasd_ccw_req *);
797void dasd_schedule_device_bh(struct dasd_device *);
798void dasd_schedule_block_bh(struct dasd_block *);
799int dasd_sleep_on(struct dasd_ccw_req *);
800int dasd_sleep_on_queue(struct list_head *);
801int dasd_sleep_on_immediatly(struct dasd_ccw_req *);
802int dasd_sleep_on_queue_interruptible(struct list_head *);
803int dasd_sleep_on_interruptible(struct dasd_ccw_req *);
804void dasd_device_set_timer(struct dasd_device *, int);
805void dasd_device_clear_timer(struct dasd_device *);
806void dasd_block_set_timer(struct dasd_block *, int);
807void dasd_block_clear_timer(struct dasd_block *);
808int dasd_cancel_req(struct dasd_ccw_req *);
809int dasd_flush_device_queue(struct dasd_device *);
810int dasd_generic_probe(struct ccw_device *);
811void dasd_generic_free_discipline(struct dasd_device *);
812void dasd_generic_remove (struct ccw_device *cdev);
813int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *);
814int dasd_generic_set_offline (struct ccw_device *cdev);
815int dasd_generic_notify(struct ccw_device *, int);
816int dasd_generic_last_path_gone(struct dasd_device *);
817int dasd_generic_path_operational(struct dasd_device *);
818void dasd_generic_shutdown(struct ccw_device *);
819
820void dasd_generic_handle_state_change(struct dasd_device *);
821enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *);
822void dasd_generic_path_event(struct ccw_device *, int *);
823int dasd_generic_verify_path(struct dasd_device *, __u8);
824void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *);
825void dasd_generic_space_avail(struct dasd_device *);
826
827int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int);
828char *dasd_get_sense(struct irb *);
829
830void dasd_device_set_stop_bits(struct dasd_device *, int);
831void dasd_device_remove_stop_bits(struct dasd_device *, int);
832
833int dasd_device_is_ro(struct dasd_device *);
834
835void dasd_profile_reset(struct dasd_profile *);
836int dasd_profile_on(struct dasd_profile *);
837void dasd_profile_off(struct dasd_profile *);
838char *dasd_get_user_string(const char __user *, size_t);
839
840
841extern int dasd_max_devindex;
842extern int dasd_probeonly;
843extern int dasd_autodetect;
844extern int dasd_nopav;
845extern int dasd_nofcx;
846
847int dasd_devmap_init(void);
848void dasd_devmap_exit(void);
849
850struct dasd_device *dasd_create_device(struct ccw_device *);
851void dasd_delete_device(struct dasd_device *);
852
853int dasd_get_feature(struct ccw_device *, int);
854int dasd_set_feature(struct ccw_device *, int, int);
855
856extern const struct attribute_group *dasd_dev_groups[];
857void dasd_path_create_kobj(struct dasd_device *, int);
858void dasd_path_create_kobjects(struct dasd_device *);
859void dasd_path_remove_kobjects(struct dasd_device *);
860
861struct dasd_device *dasd_device_from_cdev(struct ccw_device *);
862struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *);
863struct dasd_device *dasd_device_from_devindex(int);
864
865void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *);
866struct dasd_device *dasd_device_from_gendisk(struct gendisk *);
867
868int dasd_parse(void) __init;
869int dasd_busid_known(const char *);
870
871
872int dasd_gendisk_init(void);
873void dasd_gendisk_exit(void);
874int dasd_gendisk_alloc(struct dasd_block *);
875void dasd_gendisk_free(struct dasd_block *);
876int dasd_scan_partitions(struct dasd_block *);
877void dasd_destroy_partitions(struct dasd_block *);
878
879
880int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long);
881int dasd_set_read_only(struct block_device *bdev, bool ro);
882
883
884int dasd_proc_init(void);
885void dasd_proc_exit(void);
886
887
888struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *);
889struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *);
890struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int,
891 struct dasd_device *);
892void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *);
893void dasd_log_sense(struct dasd_ccw_req *, struct irb *);
894void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb);
895
896
897struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *);
898void dasd_3990_erp_handle_sim(struct dasd_device *, char *);
899
900
901#ifdef CONFIG_DASD_EER
902int dasd_eer_init(void);
903void dasd_eer_exit(void);
904int dasd_eer_enable(struct dasd_device *);
905void dasd_eer_disable(struct dasd_device *);
906void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr,
907 unsigned int id);
908void dasd_eer_snss(struct dasd_device *);
909
910static inline int dasd_eer_enabled(struct dasd_device *device)
911{
912 return device->eer_cqr != NULL;
913}
914#else
915#define dasd_eer_init() (0)
916#define dasd_eer_exit() do { } while (0)
917#define dasd_eer_enable(d) (0)
918#define dasd_eer_disable(d) do { } while (0)
919#define dasd_eer_write(d,c,i) do { } while (0)
920#define dasd_eer_snss(d) do { } while (0)
921#define dasd_eer_enabled(d) (0)
922#endif
923
924
925
926
927
928
929
930static inline int dasd_path_is_operational(struct dasd_device *device, int chp)
931{
932 return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
933}
934
935static inline int dasd_path_need_verify(struct dasd_device *device, int chp)
936{
937 return test_bit(DASD_PATH_TBV, &device->path[chp].flags);
938}
939
940static inline void dasd_path_verify(struct dasd_device *device, int chp)
941{
942 __set_bit(DASD_PATH_TBV, &device->path[chp].flags);
943}
944
945static inline void dasd_path_clear_verify(struct dasd_device *device, int chp)
946{
947 __clear_bit(DASD_PATH_TBV, &device->path[chp].flags);
948}
949
950static inline void dasd_path_clear_all_verify(struct dasd_device *device)
951{
952 int chp;
953
954 for (chp = 0; chp < 8; chp++)
955 dasd_path_clear_verify(device, chp);
956}
957
958static inline void dasd_path_fcsec(struct dasd_device *device, int chp)
959{
960 __set_bit(DASD_PATH_FCSEC, &device->path[chp].flags);
961}
962
963static inline void dasd_path_clear_fcsec(struct dasd_device *device, int chp)
964{
965 __clear_bit(DASD_PATH_FCSEC, &device->path[chp].flags);
966}
967
968static inline int dasd_path_need_fcsec(struct dasd_device *device, int chp)
969{
970 return test_bit(DASD_PATH_FCSEC, &device->path[chp].flags);
971}
972
973static inline void dasd_path_clear_all_fcsec(struct dasd_device *device)
974{
975 int chp;
976
977 for (chp = 0; chp < 8; chp++)
978 dasd_path_clear_fcsec(device, chp);
979}
980
981static inline void dasd_path_operational(struct dasd_device *device, int chp)
982{
983 __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
984 device->opm |= (0x80 >> chp);
985}
986
987static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp)
988{
989 __set_bit(DASD_PATH_NPP, &device->path[chp].flags);
990}
991
992static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp)
993{
994 return test_bit(DASD_PATH_NPP, &device->path[chp].flags);
995}
996
997static inline void dasd_path_clear_nonpreferred(struct dasd_device *device,
998 int chp)
999{
1000 __clear_bit(DASD_PATH_NPP, &device->path[chp].flags);
1001}
1002
1003static inline void dasd_path_preferred(struct dasd_device *device, int chp)
1004{
1005 __set_bit(DASD_PATH_PP, &device->path[chp].flags);
1006}
1007
1008static inline int dasd_path_is_preferred(struct dasd_device *device, int chp)
1009{
1010 return test_bit(DASD_PATH_PP, &device->path[chp].flags);
1011}
1012
1013static inline void dasd_path_clear_preferred(struct dasd_device *device,
1014 int chp)
1015{
1016 __clear_bit(DASD_PATH_PP, &device->path[chp].flags);
1017}
1018
1019static inline void dasd_path_clear_oper(struct dasd_device *device, int chp)
1020{
1021 __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
1022 device->opm &= ~(0x80 >> chp);
1023}
1024
1025static inline void dasd_path_clear_cable(struct dasd_device *device, int chp)
1026{
1027 __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
1028}
1029
1030static inline void dasd_path_cuir(struct dasd_device *device, int chp)
1031{
1032 __set_bit(DASD_PATH_CUIR, &device->path[chp].flags);
1033}
1034
1035static inline int dasd_path_is_cuir(struct dasd_device *device, int chp)
1036{
1037 return test_bit(DASD_PATH_CUIR, &device->path[chp].flags);
1038}
1039
1040static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp)
1041{
1042 __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags);
1043}
1044
1045static inline void dasd_path_ifcc(struct dasd_device *device, int chp)
1046{
1047 set_bit(DASD_PATH_IFCC, &device->path[chp].flags);
1048}
1049
1050static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp)
1051{
1052 return test_bit(DASD_PATH_IFCC, &device->path[chp].flags);
1053}
1054
1055static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp)
1056{
1057 clear_bit(DASD_PATH_IFCC, &device->path[chp].flags);
1058}
1059
1060static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp)
1061{
1062 __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
1063}
1064
1065static inline void dasd_path_miscabled(struct dasd_device *device, int chp)
1066{
1067 __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
1068}
1069
1070static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp)
1071{
1072 return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
1073}
1074
1075static inline void dasd_path_nohpf(struct dasd_device *device, int chp)
1076{
1077 __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
1078}
1079
1080static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp)
1081{
1082 return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
1083}
1084
1085
1086
1087
1088
1089
1090static inline __u8 dasd_path_get_opm(struct dasd_device *device)
1091{
1092 return device->opm;
1093}
1094
1095static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device)
1096{
1097 int chp;
1098 __u8 tbvpm = 0x00;
1099
1100 for (chp = 0; chp < 8; chp++)
1101 if (dasd_path_need_verify(device, chp))
1102 tbvpm |= 0x80 >> chp;
1103 return tbvpm;
1104}
1105
1106static inline int dasd_path_get_fcsecpm(struct dasd_device *device)
1107{
1108 int chp;
1109
1110 for (chp = 0; chp < 8; chp++)
1111 if (dasd_path_need_fcsec(device, chp))
1112 return 1;
1113
1114 return 0;
1115}
1116
1117static inline __u8 dasd_path_get_nppm(struct dasd_device *device)
1118{
1119 int chp;
1120 __u8 npm = 0x00;
1121
1122 for (chp = 0; chp < 8; chp++) {
1123 if (dasd_path_is_nonpreferred(device, chp))
1124 npm |= 0x80 >> chp;
1125 }
1126 return npm;
1127}
1128
1129static inline __u8 dasd_path_get_ppm(struct dasd_device *device)
1130{
1131 int chp;
1132 __u8 ppm = 0x00;
1133
1134 for (chp = 0; chp < 8; chp++)
1135 if (dasd_path_is_preferred(device, chp))
1136 ppm |= 0x80 >> chp;
1137 return ppm;
1138}
1139
1140static inline __u8 dasd_path_get_cablepm(struct dasd_device *device)
1141{
1142 int chp;
1143 __u8 cablepm = 0x00;
1144
1145 for (chp = 0; chp < 8; chp++)
1146 if (dasd_path_is_miscabled(device, chp))
1147 cablepm |= 0x80 >> chp;
1148 return cablepm;
1149}
1150
1151static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device)
1152{
1153 int chp;
1154 __u8 cuirpm = 0x00;
1155
1156 for (chp = 0; chp < 8; chp++)
1157 if (dasd_path_is_cuir(device, chp))
1158 cuirpm |= 0x80 >> chp;
1159 return cuirpm;
1160}
1161
1162static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device)
1163{
1164 int chp;
1165 __u8 ifccpm = 0x00;
1166
1167 for (chp = 0; chp < 8; chp++)
1168 if (dasd_path_is_ifcc(device, chp))
1169 ifccpm |= 0x80 >> chp;
1170 return ifccpm;
1171}
1172
1173static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device)
1174{
1175 int chp;
1176 __u8 hpfpm = 0x00;
1177
1178 for (chp = 0; chp < 8; chp++)
1179 if (dasd_path_is_nohpf(device, chp))
1180 hpfpm |= 0x80 >> chp;
1181 return hpfpm;
1182}
1183
1184static inline u8 dasd_path_get_fcs_path(struct dasd_device *device, int chp)
1185{
1186 return device->path[chp].fc_security;
1187}
1188
1189static inline int dasd_path_get_fcs_device(struct dasd_device *device)
1190{
1191 u8 fc_sec = 0;
1192 int chp;
1193
1194 for (chp = 0; chp < 8; chp++) {
1195 if (device->opm & (0x80 >> chp)) {
1196 fc_sec = device->path[chp].fc_security;
1197 break;
1198 }
1199 }
1200 for (; chp < 8; chp++) {
1201 if (device->opm & (0x80 >> chp))
1202 if (device->path[chp].fc_security != fc_sec)
1203 return -EINVAL;
1204 }
1205
1206 return fc_sec;
1207}
1208
1209
1210
1211
1212
1213static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm)
1214{
1215 int chp;
1216
1217 for (chp = 0; chp < 8; chp++)
1218 if (pm & (0x80 >> chp))
1219 dasd_path_verify(device, chp);
1220}
1221
1222static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device)
1223{
1224 int chp;
1225 __u8 nopm = 0x00;
1226
1227 for (chp = 0; chp < 8; chp++)
1228 if (dasd_path_is_nohpf(device, chp) ||
1229 dasd_path_is_ifcc(device, chp) ||
1230 dasd_path_is_cuir(device, chp) ||
1231 dasd_path_is_miscabled(device, chp))
1232 nopm |= 0x80 >> chp;
1233 return nopm;
1234}
1235
1236static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm)
1237{
1238 int chp;
1239
1240 for (chp = 0; chp < 8; chp++)
1241 if (pm & (0x80 >> chp)) {
1242 dasd_path_operational(device, chp);
1243
1244
1245
1246
1247 dasd_path_clear_nohpf(device, chp);
1248 dasd_path_clear_cuir(device, chp);
1249 dasd_path_clear_cable(device, chp);
1250 dasd_path_clear_ifcc(device, chp);
1251 }
1252}
1253
1254static inline void dasd_path_add_cablepm(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_miscabled(device, chp);
1261}
1262
1263static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm)
1264{
1265 int chp;
1266
1267 for (chp = 0; chp < 8; chp++)
1268 if (pm & (0x80 >> chp))
1269 dasd_path_cuir(device, chp);
1270}
1271
1272static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm)
1273{
1274 int chp;
1275
1276 for (chp = 0; chp < 8; chp++)
1277 if (pm & (0x80 >> chp))
1278 dasd_path_ifcc(device, chp);
1279}
1280
1281static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm)
1282{
1283 int chp;
1284
1285 for (chp = 0; chp < 8; chp++)
1286 if (pm & (0x80 >> chp))
1287 dasd_path_nonpreferred(device, chp);
1288}
1289
1290static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm)
1291{
1292 int chp;
1293
1294 for (chp = 0; chp < 8; chp++)
1295 if (pm & (0x80 >> chp))
1296 dasd_path_nohpf(device, chp);
1297}
1298
1299static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm)
1300{
1301 int chp;
1302
1303 for (chp = 0; chp < 8; chp++)
1304 if (pm & (0x80 >> chp))
1305 dasd_path_preferred(device, chp);
1306}
1307
1308
1309
1310
1311
1312static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm)
1313{
1314 int chp;
1315
1316 for (chp = 0; chp < 8; chp++)
1317 if (pm & (0x80 >> chp))
1318 dasd_path_verify(device, chp);
1319 else
1320 dasd_path_clear_verify(device, chp);
1321}
1322
1323static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm)
1324{
1325 int chp;
1326
1327 for (chp = 0; chp < 8; chp++) {
1328 dasd_path_clear_oper(device, chp);
1329 if (pm & (0x80 >> chp)) {
1330 dasd_path_operational(device, chp);
1331
1332
1333
1334
1335 dasd_path_clear_nohpf(device, chp);
1336 dasd_path_clear_cuir(device, chp);
1337 dasd_path_clear_cable(device, chp);
1338 dasd_path_clear_ifcc(device, chp);
1339 }
1340 }
1341}
1342
1343
1344
1345
1346
1347static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm)
1348{
1349 int chp;
1350
1351 for (chp = 0; chp < 8; chp++) {
1352 if (pm & (0x80 >> chp))
1353 dasd_path_clear_oper(device, chp);
1354 }
1355}
1356
1357
1358
1359
1360
1361static inline void dasd_path_available(struct dasd_device *device, int chp)
1362{
1363 dasd_path_clear_oper(device, chp);
1364 dasd_path_verify(device, chp);
1365}
1366
1367static inline void dasd_path_notoper(struct dasd_device *device, int chp)
1368{
1369 dasd_path_clear_oper(device, chp);
1370 dasd_path_clear_preferred(device, chp);
1371 dasd_path_clear_nonpreferred(device, chp);
1372}
1373
1374static inline void dasd_path_fcsec_update(struct dasd_device *device, int chp)
1375{
1376 dasd_path_fcsec(device, chp);
1377}
1378
1379
1380
1381
1382static inline void dasd_path_no_path(struct dasd_device *device)
1383{
1384 int chp;
1385
1386 for (chp = 0; chp < 8; chp++)
1387 dasd_path_notoper(device, chp);
1388
1389 dasd_path_clear_all_verify(device);
1390}
1391
1392
1393
1394#endif
1395