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Merge commit 'linus/master' into HEAD
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / s390 / block / dasd_int.h
CommitLineData
138c014d 1/*
1da177e4
LT		 2 * File...........: linux/drivers/s390/block/dasd_int.h
3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
138c014d 4 * Horst Hummel <Horst.Hummel@de.ibm.com>
1da177e4
LT		 5 * Martin Schwidefsky <schwidefsky@de.ibm.com>
6 * Bugreports.to..: <Linux390@de.ibm.com>
7 * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
8 *
1da177e4
LT		 9 */
10
11#ifndef DASD_INT_H
12#define DASD_INT_H
13
14#ifdef __KERNEL__
15
1da177e4
LT		 16/* we keep old device allocation scheme; IOW, minors are still in 0..255 */
17#define DASD_PER_MAJOR (1U << (MINORBITS - DASD_PARTN_BITS))
18#define DASD_PARTN_MASK ((1 << DASD_PARTN_BITS) - 1)
19
20/*
21 * States a dasd device can have:
22 * new: the dasd_device structure is allocated.
23 * known: the discipline for the device is identified.
24 * basic: the device can do basic i/o.
90f0094d 25 * unfmt: the device could not be analyzed (format is unknown).
1da177e4
LT		 26 * ready: partition detection is done and the device is can do block io.
27 * online: the device accepts requests from the block device queue.
28 *
29 * Things to do for startup state transitions:
30 * new -> known: find discipline for the device and create devfs entries.
31 * known -> basic: request irq line for the device.
32 * basic -> ready: do the initial analysis, e.g. format detection,
33 * do block device setup and detect partitions.
34 * ready -> online: schedule the device tasklet.
35 * Things to do for shutdown state transitions:
36 * online -> ready: just set the new device state.
37 * ready -> basic: flush requests from the block device layer, clear
38 * partition information and reset format information.
39 * basic -> known: terminate all requests and free irq.
40 * known -> new: remove devfs entries and forget discipline.
41 */
42
43#define DASD_STATE_NEW 0
44#define DASD_STATE_KNOWN 1
45#define DASD_STATE_BASIC 2
90f0094d
HH		 46#define DASD_STATE_UNFMT 3
47#define DASD_STATE_READY 4
48#define DASD_STATE_ONLINE 5
1da177e4
LT		 49
50#include <linux/module.h>
51#include <linux/wait.h>
52#include <linux/blkdev.h>
1da177e4
LT		 53#include <linux/genhd.h>
54#include <linux/hdreg.h>
55#include <linux/interrupt.h>
e108cebb 56#include <linux/log2.h>
1da177e4
LT		 57#include <asm/ccwdev.h>
58#include <linux/workqueue.h>
59#include <asm/debug.h>
60#include <asm/dasd.h>
61#include <asm/idals.h>
62
63/*
64 * SECTION: Type definitions
65 */
66struct dasd_device;
8e09f215 67struct dasd_block;
1da177e4
LT		 68
69/* BIT DEFINITIONS FOR SENSE DATA */
70#define DASD_SENSE_BIT_0 0x80
71#define DASD_SENSE_BIT_1 0x40
72#define DASD_SENSE_BIT_2 0x20
73#define DASD_SENSE_BIT_3 0x10
74
f60c768c
SH		 75/* BIT DEFINITIONS FOR SIM SENSE */
76#define DASD_SIM_SENSE 0x0F
77#define DASD_SIM_MSG_TO_OP 0x03
78#define DASD_SIM_LOG 0x0C
79
1da177e4
LT		 80/*
81 * SECTION: MACROs for klogd and s390 debug feature (dbf)
82 */
83#define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \
84do { \
85 debug_sprintf_event(d_device->debug_area, \
86 d_level, \
87 d_str "\n", \
88 d_data); \
89} while(0)
90
91#define DBF_DEV_EXC(d_level, d_device, d_str, d_data...) \
92do { \
93 debug_sprintf_exception(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_EXC(d_level, d_str, d_data...)\
108do { \
109 debug_sprintf_exception(dasd_debug_area, \
110 d_level,\
111 d_str "\n", \
112 d_data); \
113} while(0)
114
fc19f381
SH		 115/* limit size for an errorstring */
116#define ERRORLENGTH 30
117
1da177e4
LT		 118/* definition of dbf debug levels */
119#define DBF_EMERG 0 /* system is unusable */
120#define DBF_ALERT 1 /* action must be taken immediately */
121#define DBF_CRIT 2 /* critical conditions */
122#define DBF_ERR 3 /* error conditions */
123#define DBF_WARNING 4 /* warning conditions */
124#define DBF_NOTICE 5 /* normal but significant condition */
125#define DBF_INFO 6 /* informational */
126#define DBF_DEBUG 6 /* debug-level messages */
127
128/* messages to be written via klogd and dbf */
129#define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\
130do { \
131 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
2a0217d5 132 dev_name(&d_device->cdev->dev), d_args); \
1da177e4
LT		 133 DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \
134} while(0)
135
136#define MESSAGE(d_loglevel,d_string,d_args...)\
137do { \
138 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
139 DBF_EVENT(DBF_ALERT, d_string, d_args); \
140} while(0)
141
142/* messages to be written via klogd only */
143#define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\
144do { \
145 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
2a0217d5 146 dev_name(&d_device->cdev->dev), d_args); \
1da177e4
LT		 147} while(0)
148
149#define MESSAGE_LOG(d_loglevel,d_string,d_args...)\
150do { \
151 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
152} while(0)
153
154struct dasd_ccw_req {
155 unsigned int magic; /* Eye catcher */
8e09f215
SW		 156 struct list_head devlist; /* for dasd_device request queue */
157 struct list_head blocklist; /* for dasd_block request queue */
1da177e4
LT		 158
159 /* Where to execute what... */
8e09f215
SW		 160 struct dasd_block *block; /* the originating block device */
161 struct dasd_device *memdev; /* the device used to allocate this */
162 struct dasd_device *startdev; /* device the request is started on */
f3eb5384
SW		 163 void *cpaddr; /* address of ccw or tcw */
164 unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */
8e09f215 165 char status; /* status of this request */
1da177e4
LT		 166 short retries; /* A retry counter */
167 unsigned long flags; /* flags of this request */
168
169 /* ... and how */
170 unsigned long starttime; /* jiffies time of request start */
171 int expires; /* expiration period in jiffies */
8e09f215 172 char lpm; /* logical path mask */
1da177e4
LT		 173 void *data; /* pointer to data area */
174
175 /* these are important for recovering erroneous requests */
6cc7f168 176 int intrc; /* internal error, e.g. from start_IO */
1da177e4
LT		 177 struct irb irb; /* device status in case of an error */
178 struct dasd_ccw_req *refers; /* ERP-chain queueing. */
179 void *function; /* originating ERP action */
180
181 /* these are for statistics only */
182 unsigned long long buildclk; /* TOD-clock of request generation */
183 unsigned long long startclk; /* TOD-clock of request start */
184 unsigned long long stopclk; /* TOD-clock of request interrupt */
185 unsigned long long endclk; /* TOD-clock of request termination */
186
187 /* Callback that is called after reaching final status. */
8e09f215
SW		 188 void (*callback)(struct dasd_ccw_req *, void *data);
189 void *callback_data;
1da177e4
LT		 190};
191
138c014d 192/*
1da177e4
LT		 193 * dasd_ccw_req -> status can be:
194 */
8e09f215
SW		 195#define DASD_CQR_FILLED 0x00 /* request is ready to be processed */
196#define DASD_CQR_DONE 0x01 /* request is completed successfully */
197#define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */
198#define DASD_CQR_IN_ERP 0x03 /* request is in recovery */
199#define DASD_CQR_FAILED 0x04 /* request is finally failed */
200#define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */
201
202#define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */
203#define DASD_CQR_IN_IO 0x81 /* request is currently in IO */
204#define DASD_CQR_ERROR 0x82 /* request is completed with error */
205#define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */
206#define DASD_CQR_CLEARED 0x84 /* request was cleared */
73ac36ea 207#define DASD_CQR_SUCCESS 0x85 /* request was successful */
8e09f215 208
1da177e4
LT		 209
210/* per dasd_ccw_req flags */
211#define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */
1c01b8a5 212#define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */
1da177e4
LT		 213
214/* Signature for error recovery functions. */
215typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *);
216
217/*
218 * the struct dasd_discipline is
219 * sth like a table of virtual functions, if you think of dasd_eckd
220 * inheriting dasd...
221 * no, currently we are not planning to reimplement the driver in C++
222 */
223struct dasd_discipline {
224 struct module *owner;
225 char ebcname[8]; /* a name used for tagging and printks */
226 char name[8]; /* a name used for tagging and printks */
227 int max_blocks; /* maximum number of blocks to be chained */
228
229 struct list_head list; /* used for list of disciplines */
230
8e09f215
SW		 231 /*
232 * Device recognition functions. check_device is used to verify
233 * the sense data and the information returned by read device
234 * characteristics. It returns 0 if the discipline can be used
235 * for the device in question. uncheck_device is called during
236 * device shutdown to deregister a device from its discipline.
237 */
238 int (*check_device) (struct dasd_device *);
239 void (*uncheck_device) (struct dasd_device *);
240
241 /*
242 * do_analysis is used in the step from device state "basic" to
243 * state "accept". It returns 0 if the device can be made ready,
244 * it returns -EMEDIUMTYPE if the device can't be made ready or
245 * -EAGAIN if do_analysis started a ccw that needs to complete
246 * before the analysis may be repeated.
247 */
248 int (*do_analysis) (struct dasd_block *);
249
250 /*
251 * Last things to do when a device is set online, and first things
252 * when it is set offline.
253 */
254 int (*ready_to_online) (struct dasd_device *);
255 int (*online_to_ready) (struct dasd_device *);
256
257 /*
258 * Device operation functions. build_cp creates a ccw chain for
259 * a block device request, start_io starts the request and
260 * term_IO cancels it (e.g. in case of a timeout). format_device
261 * returns a ccw chain to be used to format the device.
262 * handle_terminated_request allows to examine a cqr and prepare
263 * it for retry.
264 */
1da177e4 265 struct dasd_ccw_req *(*build_cp) (struct dasd_device *,
8e09f215 266 struct dasd_block *,
1da177e4
LT		 267 struct request *);
268 int (*start_IO) (struct dasd_ccw_req *);
269 int (*term_IO) (struct dasd_ccw_req *);
8e09f215 270 void (*handle_terminated_request) (struct dasd_ccw_req *);
1da177e4
LT		 271 struct dasd_ccw_req *(*format_device) (struct dasd_device *,
272 struct format_data_t *);
273 int (*free_cp) (struct dasd_ccw_req *, struct request *);
8e09f215
SW		 274
275 /*
276 * Error recovery functions. examine_error() returns a value that
277 * indicates what to do for an error condition. If examine_error()
138c014d 278 * returns 'dasd_era_recover' erp_action() is called to create a
8e09f215
SW		 279 * special error recovery ccw. erp_postaction() is called after
280 * an error recovery ccw has finished its execution. dump_sense
281 * is called for every error condition to print the sense data
282 * to the console.
283 */
1da177e4
LT		 284 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *);
285 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *);
286 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *,
287 struct irb *);
fc19f381
SH		 288 void (*dump_sense_dbf) (struct dasd_device *, struct dasd_ccw_req *,
289 struct irb *, char *);
1da177e4 290
8e09f215
SW		 291 void (*handle_unsolicited_interrupt) (struct dasd_device *,
292 struct irb *);
293
1da177e4 294 /* i/o control functions. */
8e09f215 295 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *);
1da177e4 296 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *);
8e09f215 297 int (*ioctl) (struct dasd_block *, unsigned int, void __user *);
1da177e4
LT		 298};
299
300extern struct dasd_discipline *dasd_diag_discipline_pointer;
301
3d052595
HH		 302/*
303 * Unique identifier for dasd device.
304 */
8e09f215
SW		 305#define UA_NOT_CONFIGURED 0x00
306#define UA_BASE_DEVICE 0x01
307#define UA_BASE_PAV_ALIAS 0x02
308#define UA_HYPER_PAV_ALIAS 0x03
309
3d052595 310struct dasd_uid {
8e09f215 311 __u8 type;
3d052595
HH		 312 char vendor[4];
313 char serial[15];
314 __u16 ssid;
8e09f215
SW		 315 __u8 real_unit_addr;
316 __u8 base_unit_addr;
4abb08c2 317 char vduit[33];
3d052595 318};
20c64468
SW		 319
320/*
321 * Notification numbers for extended error reporting notifications:
322 * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's
323 * eer pointer) is freed. The error reporting module needs to do all necessary
324 * cleanup steps.
325 * The DASD_EER_TRIGGER notification sends the actual error reports (triggers).
326 */
327#define DASD_EER_DISABLE 0
328#define DASD_EER_TRIGGER 1
329
330/* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */
331#define DASD_EER_FATALERROR 1
332#define DASD_EER_NOPATH 2
333#define DASD_EER_STATECHANGE 3
334#define DASD_EER_PPRCSUSPEND 4
335
1da177e4
LT		 336struct dasd_device {
337 /* Block device stuff. */
8e09f215
SW		 338 struct dasd_block *block;
339
1da177e4 340 unsigned int devindex;
138c014d
HH		 341 unsigned long flags; /* per device flags */
342 unsigned short features; /* copy of devmap-features (read-only!) */
1da177e4 343
20c64468
SW		 344 /* extended error reporting stuff (eer) */
345 struct dasd_ccw_req *eer_cqr;
346
1da177e4
LT		 347 /* Device discipline stuff. */
348 struct dasd_discipline *discipline;
aa88861f 349 struct dasd_discipline *base_discipline;
1da177e4
LT		 350 char *private;
351
352 /* Device state and target state. */
353 int state, target;
354 int stopped; /* device (ccw_device_start) was stopped */
355
8e09f215 356 /* reference count. */
1da177e4 357 atomic_t ref_count;
1da177e4
LT		 358
359 /* ccw queue and memory for static ccw/erp buffers. */
360 struct list_head ccw_queue;
361 spinlock_t mem_lock;
362 void *ccw_mem;
363 void *erp_mem;
364 struct list_head ccw_chunks;
365 struct list_head erp_chunks;
366
367 atomic_t tasklet_scheduled;
368 struct tasklet_struct tasklet;
369 struct work_struct kick_work;
370 struct timer_list timer;
371
372 debug_info_t *debug_area;
373
374 struct ccw_device *cdev;
375
8e09f215
SW		 376 /* hook for alias management */
377 struct list_head alias_list;
378};
379
380struct dasd_block {
381 /* Block device stuff. */
382 struct gendisk *gdp;
383 struct request_queue *request_queue;
384 spinlock_t request_queue_lock;
385 struct block_device *bdev;
386 atomic_t open_count;
387
b44b0ab3 388 unsigned long long blocks; /* size of volume in blocks */
8e09f215
SW		 389 unsigned int bp_block; /* bytes per block */
390 unsigned int s2b_shift; /* log2 (bp_block/512) */
391
392 struct dasd_device *base;
393 struct list_head ccw_queue;
394 spinlock_t queue_lock;
395
396 atomic_t tasklet_scheduled;
397 struct tasklet_struct tasklet;
398 struct timer_list timer;
399
1da177e4
LT		 400#ifdef CONFIG_DASD_PROFILE
401 struct dasd_profile_info_t profile;
402#endif
403};
404
8e09f215
SW		 405
406
1da177e4
LT		 407/* reasons why device (ccw_device_start) was stopped */
408#define DASD_STOPPED_NOT_ACC 1 /* not accessible */
409#define DASD_STOPPED_QUIESCE 2 /* Quiesced */
410#define DASD_STOPPED_PENDING 4 /* long busy */
411#define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */
8e09f215 412#define DASD_STOPPED_SU 16 /* summary unit check handling */
1da177e4
LT		 413
414/* per device flags */
1da177e4 415#define DASD_FLAG_OFFLINE 3 /* device is in offline processing */
20c64468
SW		 416#define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */
417#define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */
1da177e4
LT		 418
419void dasd_put_device_wake(struct dasd_device *);
420
421/*
422 * Reference count inliners
423 */
424static inline void
425dasd_get_device(struct dasd_device *device)
426{
427 atomic_inc(&device->ref_count);
428}
429
430static inline void
431dasd_put_device(struct dasd_device *device)
432{
433 if (atomic_dec_return(&device->ref_count) == 0)
434 dasd_put_device_wake(device);
435}
436
437/*
438 * The static memory in ccw_mem and erp_mem is managed by a sorted
439 * list of free memory chunks.
440 */
441struct dasd_mchunk
442{
443 struct list_head list;
444 unsigned long size;
445} __attribute__ ((aligned(8)));
446
447static inline void
448dasd_init_chunklist(struct list_head *chunk_list, void *mem,
449 unsigned long size)
450{
451 struct dasd_mchunk *chunk;
452
453 INIT_LIST_HEAD(chunk_list);
454 chunk = (struct dasd_mchunk *) mem;
455 chunk->size = size - sizeof(struct dasd_mchunk);
456 list_add(&chunk->list, chunk_list);
457}
458
459static inline void *
460dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size)
461{
462 struct dasd_mchunk *chunk, *tmp;
463
464 size = (size + 7L) & -8L;
465 list_for_each_entry(chunk, chunk_list, list) {
466 if (chunk->size < size)
467 continue;
468 if (chunk->size > size + sizeof(struct dasd_mchunk)) {
469 char *endaddr = (char *) (chunk + 1) + chunk->size;
470 tmp = (struct dasd_mchunk *) (endaddr - size) - 1;
471 tmp->size = size;
472 chunk->size -= size + sizeof(struct dasd_mchunk);
473 chunk = tmp;
474 } else
475 list_del(&chunk->list);
476 return (void *) (chunk + 1);
477 }
478 return NULL;
479}
480
481static inline void
482dasd_free_chunk(struct list_head *chunk_list, void *mem)
483{
484 struct dasd_mchunk *chunk, *tmp;
485 struct list_head *p, *left;
486
487 chunk = (struct dasd_mchunk *)
488 ((char *) mem - sizeof(struct dasd_mchunk));
489 /* Find out the left neighbour in chunk_list. */
490 left = chunk_list;
491 list_for_each(p, chunk_list) {
492 if (list_entry(p, struct dasd_mchunk, list) > chunk)
493 break;
494 left = p;
495 }
496 /* Try to merge with right neighbour = next element from left. */
497 if (left->next != chunk_list) {
498 tmp = list_entry(left->next, struct dasd_mchunk, list);
499 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) {
500 list_del(&tmp->list);
501 chunk->size += tmp->size + sizeof(struct dasd_mchunk);
502 }
503 }
504 /* Try to merge with left neighbour. */
505 if (left != chunk_list) {
506 tmp = list_entry(left, struct dasd_mchunk, list);
507 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) {
508 tmp->size += chunk->size + sizeof(struct dasd_mchunk);
509 return;
510 }
511 }
512 __list_add(&chunk->list, left, left->next);
513}
514
515/*
516 * Check if bsize is in { 512, 1024, 2048, 4096 }
517 */
518static inline int
519dasd_check_blocksize(int bsize)
520{
e108cebb 521 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize))
1da177e4
LT		 522 return -EMEDIUMTYPE;
523 return 0;
524}
525
526/* externals in dasd.c */
527#define DASD_PROFILE_ON 1
528#define DASD_PROFILE_OFF 0
529
530extern debug_info_t *dasd_debug_area;
531extern struct dasd_profile_info_t dasd_global_profile;
532extern unsigned int dasd_profile_level;
533extern struct block_device_operations dasd_device_operations;
534
e18b890b 535extern struct kmem_cache *dasd_page_cache;
1da177e4
LT		 536
537struct dasd_ccw_req *
538dasd_kmalloc_request(char *, int, int, struct dasd_device *);
539struct dasd_ccw_req *
540dasd_smalloc_request(char *, int, int, struct dasd_device *);
541void dasd_kfree_request(struct dasd_ccw_req *, struct dasd_device *);
542void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *);
543
544static inline int
545dasd_kmalloc_set_cda(struct ccw1 *ccw, void *cda, struct dasd_device *device)
546{
547 return set_normalized_cda(ccw, cda);
548}
549
550struct dasd_device *dasd_alloc_device(void);
551void dasd_free_device(struct dasd_device *);
552
8e09f215
SW		 553struct dasd_block *dasd_alloc_block(void);
554void dasd_free_block(struct dasd_block *);
555
1da177e4
LT		 556void dasd_enable_device(struct dasd_device *);
557void dasd_set_target_state(struct dasd_device *, int);
558void dasd_kick_device(struct dasd_device *);
559
560void dasd_add_request_head(struct dasd_ccw_req *);
561void dasd_add_request_tail(struct dasd_ccw_req *);
562int dasd_start_IO(struct dasd_ccw_req *);
563int dasd_term_IO(struct dasd_ccw_req *);
8e09f215
SW		 564void dasd_schedule_device_bh(struct dasd_device *);
565void dasd_schedule_block_bh(struct dasd_block *);
1da177e4
LT		 566int dasd_sleep_on(struct dasd_ccw_req *);
567int dasd_sleep_on_immediatly(struct dasd_ccw_req *);
568int dasd_sleep_on_interruptible(struct dasd_ccw_req *);
8e09f215
SW		 569void dasd_device_set_timer(struct dasd_device *, int);
570void dasd_device_clear_timer(struct dasd_device *);
571void dasd_block_set_timer(struct dasd_block *, int);
572void dasd_block_clear_timer(struct dasd_block *);
1da177e4 573int dasd_cancel_req(struct dasd_ccw_req *);
8e09f215 574int dasd_flush_device_queue(struct dasd_device *);
1da177e4
LT		 575int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *);
576void dasd_generic_remove (struct ccw_device *cdev);
577int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *);
578int dasd_generic_set_offline (struct ccw_device *cdev);
579int dasd_generic_notify(struct ccw_device *, int);
8e09f215 580void dasd_generic_handle_state_change(struct dasd_device *);
1da177e4 581
92636b15 582int dasd_generic_read_dev_chars(struct dasd_device *, char *, void *, int);
f3eb5384 583char *dasd_get_sense(struct irb *);
17283b56 584
1da177e4
LT		 585/* externals in dasd_devmap.c */
586extern int dasd_max_devindex;
587extern int dasd_probeonly;
588extern int dasd_autodetect;
40545573 589extern int dasd_nopav;
f3eb5384 590extern int dasd_nofcx;
1da177e4
LT		 591
592int dasd_devmap_init(void);
593void dasd_devmap_exit(void);
594
595struct dasd_device *dasd_create_device(struct ccw_device *);
596void dasd_delete_device(struct dasd_device *);
597
3d052595
HH		 598int dasd_get_uid(struct ccw_device *, struct dasd_uid *);
599int dasd_set_uid(struct ccw_device *, struct dasd_uid *);
f24acd45
HH		 600int dasd_get_feature(struct ccw_device *, int);
601int dasd_set_feature(struct ccw_device *, int, int);
602
1da177e4
LT		 603int dasd_add_sysfs_files(struct ccw_device *);
604void dasd_remove_sysfs_files(struct ccw_device *);
605
606struct dasd_device *dasd_device_from_cdev(struct ccw_device *);
a00bfd71 607struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *);
1da177e4
LT		 608struct dasd_device *dasd_device_from_devindex(int);
609
610int dasd_parse(void);
69f90f6a 611int dasd_busid_known(const char *);
1da177e4
LT		 612
613/* externals in dasd_gendisk.c */
614int dasd_gendisk_init(void);
615void dasd_gendisk_exit(void);
8e09f215
SW		 616int dasd_gendisk_alloc(struct dasd_block *);
617void dasd_gendisk_free(struct dasd_block *);
618int dasd_scan_partitions(struct dasd_block *);
619void dasd_destroy_partitions(struct dasd_block *);
1da177e4
LT		 620
621/* externals in dasd_ioctl.c */
57a7c0bc 622int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long);
1da177e4
LT		 623
624/* externals in dasd_proc.c */
625int dasd_proc_init(void);
626void dasd_proc_exit(void);
627
628/* externals in dasd_erp.c */
629struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *);
630struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *);
631struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int,
632 struct dasd_device *);
633void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *);
634void dasd_log_sense(struct dasd_ccw_req *, struct irb *);
fc19f381 635void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb);
1da177e4 636
1da177e4 637/* externals in dasd_3990_erp.c */
1da177e4 638struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *);
f60c768c 639void dasd_3990_erp_handle_sim(struct dasd_device *, char *);
1da177e4 640
20c64468
SW		 641/* externals in dasd_eer.c */
642#ifdef CONFIG_DASD_EER
643int dasd_eer_init(void);
644void dasd_eer_exit(void);
645int dasd_eer_enable(struct dasd_device *);
646void dasd_eer_disable(struct dasd_device *);
647void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr,
648 unsigned int id);
649void dasd_eer_snss(struct dasd_device *);
650
651static inline int dasd_eer_enabled(struct dasd_device *device)
652{
653 return device->eer_cqr != NULL;
654}
655#else
656#define dasd_eer_init() (0)
657#define dasd_eer_exit() do { } while (0)
658#define dasd_eer_enable(d) (0)
659#define dasd_eer_disable(d) do { } while (0)
660#define dasd_eer_write(d,c,i) do { } while (0)
661#define dasd_eer_snss(d) do { } while (0)
662#define dasd_eer_enabled(d) (0)
663#endif /* CONFIG_DASD_ERR */
664
1da177e4
LT		 665#endif /* __KERNEL__ */
666
667#endif /* DASD_H */
kernel source for telekom puls (alcatel/mediatek)