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10#ifndef DASD_INT_H
11#define DASD_INT_H
12
13#ifdef __KERNEL__
14
15
16#define DASD_PER_MAJOR (1U << (MINORBITS - DASD_PARTN_BITS))
17#define DASD_PARTN_MASK ((1 << DASD_PARTN_BITS) - 1)
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40
41
42#define DASD_STATE_NEW 0
43#define DASD_STATE_KNOWN 1
44#define DASD_STATE_BASIC 2
45#define DASD_STATE_UNFMT 3
46#define DASD_STATE_READY 4
47#define DASD_STATE_ONLINE 5
48
49#include <linux/module.h>
50#include <linux/wait.h>
51#include <linux/blkdev.h>
52#include <linux/genhd.h>
53#include <linux/hdreg.h>
54#include <linux/interrupt.h>
55#include <linux/log2.h>
56#include <asm/ccwdev.h>
57#include <linux/workqueue.h>
58#include <asm/debug.h>
59#include <asm/dasd.h>
60#include <asm/idals.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
86
87#define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \
88do { \
89 debug_sprintf_event(d_device->debug_area, \
90 d_level, \
91 d_str "\n", \
92 d_data); \
93} while(0)
94
95#define DBF_DEV_EXC(d_level, d_device, d_str, d_data...) \
96do { \
97 debug_sprintf_exception(d_device->debug_area, \
98 d_level, \
99 d_str "\n", \
100 d_data); \
101} while(0)
102
103#define DBF_EVENT(d_level, d_str, d_data...)\
104do { \
105 debug_sprintf_event(dasd_debug_area, \
106 d_level,\
107 d_str "\n", \
108 d_data); \
109} while(0)
110
111#define DBF_EXC(d_level, d_str, d_data...)\
112do { \
113 debug_sprintf_exception(dasd_debug_area, \
114 d_level,\
115 d_str "\n", \
116 d_data); \
117} while(0)
118
119
120#define ERRORLENGTH 30
121
122
123#define DBF_EMERG 0
124#define DBF_ALERT 1
125#define DBF_CRIT 2
126#define DBF_ERR 3
127#define DBF_WARNING 4
128#define DBF_NOTICE 5
129#define DBF_INFO 6
130#define DBF_DEBUG 6
131
132
133#define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\
134do { \
135 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
136 dev_name(&d_device->cdev->dev), d_args); \
137 DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \
138} while(0)
139
140#define MESSAGE(d_loglevel,d_string,d_args...)\
141do { \
142 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
143 DBF_EVENT(DBF_ALERT, d_string, d_args); \
144} while(0)
145
146
147#define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\
148do { \
149 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
150 dev_name(&d_device->cdev->dev), d_args); \
151} while(0)
152
153#define MESSAGE_LOG(d_loglevel,d_string,d_args...)\
154do { \
155 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
156} while(0)
157
158struct dasd_ccw_req {
159 unsigned int magic;
160 struct list_head devlist;
161 struct list_head blocklist;
162
163
164 struct dasd_block *block;
165 struct dasd_device *memdev;
166 struct dasd_device *startdev;
167 void *cpaddr;
168 unsigned char cpmode;
169 char status;
170 short retries;
171 unsigned long flags;
172
173
174 unsigned long starttime;
175 int expires;
176 char lpm;
177 void *data;
178
179
180 int intrc;
181 struct irb irb;
182 struct dasd_ccw_req *refers;
183 void *function;
184
185
186 unsigned long long buildclk;
187 unsigned long long startclk;
188 unsigned long long stopclk;
189 unsigned long long endclk;
190
191
192 void (*callback)(struct dasd_ccw_req *, void *data);
193 void *callback_data;
194};
195
196
197
198
199#define DASD_CQR_FILLED 0x00
200#define DASD_CQR_DONE 0x01
201#define DASD_CQR_NEED_ERP 0x02
202#define DASD_CQR_IN_ERP 0x03
203#define DASD_CQR_FAILED 0x04
204#define DASD_CQR_TERMINATED 0x05
205
206#define DASD_CQR_QUEUED 0x80
207#define DASD_CQR_IN_IO 0x81
208#define DASD_CQR_ERROR 0x82
209#define DASD_CQR_CLEAR_PENDING 0x83
210#define DASD_CQR_CLEARED 0x84
211#define DASD_CQR_SUCCESS 0x85
212
213
214
215#define DASD_CQR_FLAGS_USE_ERP 0
216#define DASD_CQR_FLAGS_FAILFAST 1
217
218
219typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *);
220
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225
226
227struct dasd_discipline {
228 struct module *owner;
229 char ebcname[8];
230 char name[8];
231 int max_blocks;
232
233 struct list_head list;
234
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239
240
241
242 int (*check_device) (struct dasd_device *);
243 void (*uncheck_device) (struct dasd_device *);
244
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249
250
251
252 int (*do_analysis) (struct dasd_block *);
253
254
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256
257
258 int (*ready_to_online) (struct dasd_device *);
259 int (*online_to_ready) (struct dasd_device *);
260
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267
268
269 struct dasd_ccw_req *(*build_cp) (struct dasd_device *,
270 struct dasd_block *,
271 struct request *);
272 int (*start_IO) (struct dasd_ccw_req *);
273 int (*term_IO) (struct dasd_ccw_req *);
274 void (*handle_terminated_request) (struct dasd_ccw_req *);
275 struct dasd_ccw_req *(*format_device) (struct dasd_device *,
276 struct format_data_t *);
277 int (*free_cp) (struct dasd_ccw_req *, struct request *);
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286
287
288 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *);
289 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *);
290 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *,
291 struct irb *);
292 void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *);
293
294 void (*handle_unsolicited_interrupt) (struct dasd_device *,
295 struct irb *);
296
297
298 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *);
299 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *);
300 int (*ioctl) (struct dasd_block *, unsigned int, void __user *);
301
302
303 int (*freeze) (struct dasd_device *);
304 int (*restore) (struct dasd_device *);
305};
306
307extern struct dasd_discipline *dasd_diag_discipline_pointer;
308
309
310
311
312#define UA_NOT_CONFIGURED 0x00
313#define UA_BASE_DEVICE 0x01
314#define UA_BASE_PAV_ALIAS 0x02
315#define UA_HYPER_PAV_ALIAS 0x03
316
317struct dasd_uid {
318 __u8 type;
319 char vendor[4];
320 char serial[15];
321 __u16 ssid;
322 __u8 real_unit_addr;
323 __u8 base_unit_addr;
324 char vduit[33];
325};
326
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331
332
333
334#define DASD_EER_DISABLE 0
335#define DASD_EER_TRIGGER 1
336
337
338#define DASD_EER_FATALERROR 1
339#define DASD_EER_NOPATH 2
340#define DASD_EER_STATECHANGE 3
341#define DASD_EER_PPRCSUSPEND 4
342
343struct dasd_device {
344
345 struct dasd_block *block;
346
347 unsigned int devindex;
348 unsigned long flags;
349 unsigned short features;
350
351
352 struct dasd_ccw_req *eer_cqr;
353
354
355 struct dasd_discipline *discipline;
356 struct dasd_discipline *base_discipline;
357 char *private;
358
359
360 int state, target;
361 int stopped;
362
363
364 atomic_t ref_count;
365
366
367 struct list_head ccw_queue;
368 spinlock_t mem_lock;
369 void *ccw_mem;
370 void *erp_mem;
371 struct list_head ccw_chunks;
372 struct list_head erp_chunks;
373
374 atomic_t tasklet_scheduled;
375 struct tasklet_struct tasklet;
376 struct work_struct kick_work;
377 struct work_struct restore_device;
378 struct timer_list timer;
379
380 debug_info_t *debug_area;
381
382 struct ccw_device *cdev;
383
384
385 struct list_head alias_list;
386};
387
388struct dasd_block {
389
390 struct gendisk *gdp;
391 struct request_queue *request_queue;
392 spinlock_t request_queue_lock;
393 struct block_device *bdev;
394 atomic_t open_count;
395
396 unsigned long long blocks;
397 unsigned int bp_block;
398 unsigned int s2b_shift;
399
400 struct dasd_device *base;
401 struct list_head ccw_queue;
402 spinlock_t queue_lock;
403
404 atomic_t tasklet_scheduled;
405 struct tasklet_struct tasklet;
406 struct timer_list timer;
407
408#ifdef CONFIG_DASD_PROFILE
409 struct dasd_profile_info_t profile;
410#endif
411};
412
413
414
415
416#define DASD_STOPPED_NOT_ACC 1
417#define DASD_STOPPED_QUIESCE 2
418#define DASD_STOPPED_PENDING 4
419#define DASD_STOPPED_DC_WAIT 8
420#define DASD_STOPPED_SU 16
421#define DASD_STOPPED_PM 32
422#define DASD_UNRESUMED_PM 64
423
424
425#define DASD_FLAG_OFFLINE 3
426#define DASD_FLAG_EER_SNSS 4
427#define DASD_FLAG_EER_IN_USE 5
428
429void dasd_put_device_wake(struct dasd_device *);
430
431
432
433
434static inline void
435dasd_get_device(struct dasd_device *device)
436{
437 atomic_inc(&device->ref_count);
438}
439
440static inline void
441dasd_put_device(struct dasd_device *device)
442{
443 if (atomic_dec_return(&device->ref_count) == 0)
444 dasd_put_device_wake(device);
445}
446
447
448
449
450
451struct dasd_mchunk
452{
453 struct list_head list;
454 unsigned long size;
455} __attribute__ ((aligned(8)));
456
457static inline void
458dasd_init_chunklist(struct list_head *chunk_list, void *mem,
459 unsigned long size)
460{
461 struct dasd_mchunk *chunk;
462
463 INIT_LIST_HEAD(chunk_list);
464 chunk = (struct dasd_mchunk *) mem;
465 chunk->size = size - sizeof(struct dasd_mchunk);
466 list_add(&chunk->list, chunk_list);
467}
468
469static inline void *
470dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size)
471{
472 struct dasd_mchunk *chunk, *tmp;
473
474 size = (size + 7L) & -8L;
475 list_for_each_entry(chunk, chunk_list, list) {
476 if (chunk->size < size)
477 continue;
478 if (chunk->size > size + sizeof(struct dasd_mchunk)) {
479 char *endaddr = (char *) (chunk + 1) + chunk->size;
480 tmp = (struct dasd_mchunk *) (endaddr - size) - 1;
481 tmp->size = size;
482 chunk->size -= size + sizeof(struct dasd_mchunk);
483 chunk = tmp;
484 } else
485 list_del(&chunk->list);
486 return (void *) (chunk + 1);
487 }
488 return NULL;
489}
490
491static inline void
492dasd_free_chunk(struct list_head *chunk_list, void *mem)
493{
494 struct dasd_mchunk *chunk, *tmp;
495 struct list_head *p, *left;
496
497 chunk = (struct dasd_mchunk *)
498 ((char *) mem - sizeof(struct dasd_mchunk));
499
500 left = chunk_list;
501 list_for_each(p, chunk_list) {
502 if (list_entry(p, struct dasd_mchunk, list) > chunk)
503 break;
504 left = p;
505 }
506
507 if (left->next != chunk_list) {
508 tmp = list_entry(left->next, struct dasd_mchunk, list);
509 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) {
510 list_del(&tmp->list);
511 chunk->size += tmp->size + sizeof(struct dasd_mchunk);
512 }
513 }
514
515 if (left != chunk_list) {
516 tmp = list_entry(left, struct dasd_mchunk, list);
517 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) {
518 tmp->size += chunk->size + sizeof(struct dasd_mchunk);
519 return;
520 }
521 }
522 __list_add(&chunk->list, left, left->next);
523}
524
525
526
527
528static inline int
529dasd_check_blocksize(int bsize)
530{
531 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize))
532 return -EMEDIUMTYPE;
533 return 0;
534}
535
536
537#define DASD_PROFILE_ON 1
538#define DASD_PROFILE_OFF 0
539
540extern debug_info_t *dasd_debug_area;
541extern struct dasd_profile_info_t dasd_global_profile;
542extern unsigned int dasd_profile_level;
543extern const struct block_device_operations dasd_device_operations;
544
545extern struct kmem_cache *dasd_page_cache;
546
547struct dasd_ccw_req *
548dasd_kmalloc_request(int , int, int, struct dasd_device *);
549struct dasd_ccw_req *
550dasd_smalloc_request(int , int, int, struct dasd_device *);
551void dasd_kfree_request(struct dasd_ccw_req *, struct dasd_device *);
552void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *);
553
554static inline int
555dasd_kmalloc_set_cda(struct ccw1 *ccw, void *cda, struct dasd_device *device)
556{
557 return set_normalized_cda(ccw, cda);
558}
559
560struct dasd_device *dasd_alloc_device(void);
561void dasd_free_device(struct dasd_device *);
562
563struct dasd_block *dasd_alloc_block(void);
564void dasd_free_block(struct dasd_block *);
565
566void dasd_enable_device(struct dasd_device *);
567void dasd_set_target_state(struct dasd_device *, int);
568void dasd_kick_device(struct dasd_device *);
569void dasd_restore_device(struct dasd_device *);
570
571void dasd_add_request_head(struct dasd_ccw_req *);
572void dasd_add_request_tail(struct dasd_ccw_req *);
573int dasd_start_IO(struct dasd_ccw_req *);
574int dasd_term_IO(struct dasd_ccw_req *);
575void dasd_schedule_device_bh(struct dasd_device *);
576void dasd_schedule_block_bh(struct dasd_block *);
577int dasd_sleep_on(struct dasd_ccw_req *);
578int dasd_sleep_on_immediatly(struct dasd_ccw_req *);
579int dasd_sleep_on_interruptible(struct dasd_ccw_req *);
580void dasd_device_set_timer(struct dasd_device *, int);
581void dasd_device_clear_timer(struct dasd_device *);
582void dasd_block_set_timer(struct dasd_block *, int);
583void dasd_block_clear_timer(struct dasd_block *);
584int dasd_cancel_req(struct dasd_ccw_req *);
585int dasd_flush_device_queue(struct dasd_device *);
586int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *);
587void dasd_generic_remove (struct ccw_device *cdev);
588int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *);
589int dasd_generic_set_offline (struct ccw_device *cdev);
590int dasd_generic_notify(struct ccw_device *, int);
591void dasd_generic_handle_state_change(struct dasd_device *);
592int dasd_generic_pm_freeze(struct ccw_device *);
593int dasd_generic_restore_device(struct ccw_device *);
594
595int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int);
596char *dasd_get_sense(struct irb *);
597
598
599extern int dasd_max_devindex;
600extern int dasd_probeonly;
601extern int dasd_autodetect;
602extern int dasd_nopav;
603extern int dasd_nofcx;
604
605int dasd_devmap_init(void);
606void dasd_devmap_exit(void);
607
608struct dasd_device *dasd_create_device(struct ccw_device *);
609void dasd_delete_device(struct dasd_device *);
610
611int dasd_get_uid(struct ccw_device *, struct dasd_uid *);
612int dasd_set_uid(struct ccw_device *, struct dasd_uid *);
613int dasd_get_feature(struct ccw_device *, int);
614int dasd_set_feature(struct ccw_device *, int, int);
615
616int dasd_add_sysfs_files(struct ccw_device *);
617void dasd_remove_sysfs_files(struct ccw_device *);
618
619struct dasd_device *dasd_device_from_cdev(struct ccw_device *);
620struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *);
621struct dasd_device *dasd_device_from_devindex(int);
622
623int dasd_parse(void);
624int dasd_busid_known(const char *);
625
626
627int dasd_gendisk_init(void);
628void dasd_gendisk_exit(void);
629int dasd_gendisk_alloc(struct dasd_block *);
630void dasd_gendisk_free(struct dasd_block *);
631int dasd_scan_partitions(struct dasd_block *);
632void dasd_destroy_partitions(struct dasd_block *);
633
634
635int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long);
636
637
638int dasd_proc_init(void);
639void dasd_proc_exit(void);
640
641
642struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *);
643struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *);
644struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int,
645 struct dasd_device *);
646void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *);
647void dasd_log_sense(struct dasd_ccw_req *, struct irb *);
648void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb);
649
650
651struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *);
652void dasd_3990_erp_handle_sim(struct dasd_device *, char *);
653
654
655#ifdef CONFIG_DASD_EER
656int dasd_eer_init(void);
657void dasd_eer_exit(void);
658int dasd_eer_enable(struct dasd_device *);
659void dasd_eer_disable(struct dasd_device *);
660void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr,
661 unsigned int id);
662void dasd_eer_snss(struct dasd_device *);
663
664static inline int dasd_eer_enabled(struct dasd_device *device)
665{
666 return device->eer_cqr != NULL;
667}
668#else
669#define dasd_eer_init() (0)
670#define dasd_eer_exit() do { } while (0)
671#define dasd_eer_enable(d) (0)
672#define dasd_eer_disable(d) do { } while (0)
673#define dasd_eer_write(d,c,i) do { } while (0)
674#define dasd_eer_snss(d) do { } while (0)
675#define dasd_eer_enabled(d) (0)
676#endif
677
678#endif
679
680#endif
681