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s390/cio: Add support for FCES status notification
[linux-block.git] / drivers / s390 / block / dasd_int.h
CommitLineData
b2441318 1/* SPDX-License-Identifier: GPL-2.0 */
138c014d 2/*
1da177e4 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>
d41dd122 7 * Copyright IBM Corp. 1999, 2009
1da177e4
LT		 8 */
9
10#ifndef DASD_INT_H
11#define DASD_INT_H
12
1da177e4
LT		 13/* we keep old device allocation scheme; IOW, minors are still in 0..255 */
14#define DASD_PER_MAJOR (1U << (MINORBITS - DASD_PARTN_BITS))
15#define DASD_PARTN_MASK ((1 << DASD_PARTN_BITS) - 1)
16
17/*
18 * States a dasd device can have:
19 * new: the dasd_device structure is allocated.
20 * known: the discipline for the device is identified.
21 * basic: the device can do basic i/o.
90f0094d 22 * unfmt: the device could not be analyzed (format is unknown).
1da177e4
LT		 23 * ready: partition detection is done and the device is can do block io.
24 * online: the device accepts requests from the block device queue.
25 *
26 * Things to do for startup state transitions:
27 * new -> known: find discipline for the device and create devfs entries.
28 * known -> basic: request irq line for the device.
29 * basic -> ready: do the initial analysis, e.g. format detection,
30 * do block device setup and detect partitions.
31 * ready -> online: schedule the device tasklet.
32 * Things to do for shutdown state transitions:
33 * online -> ready: just set the new device state.
34 * ready -> basic: flush requests from the block device layer, clear
35 * partition information and reset format information.
36 * basic -> known: terminate all requests and free irq.
37 * known -> new: remove devfs entries and forget discipline.
38 */
39
40#define DASD_STATE_NEW 0
41#define DASD_STATE_KNOWN 1
42#define DASD_STATE_BASIC 2
90f0094d
HH		 43#define DASD_STATE_UNFMT 3
44#define DASD_STATE_READY 4
45#define DASD_STATE_ONLINE 5
1da177e4
LT		 46
47#include <linux/module.h>
48#include <linux/wait.h>
49#include <linux/blkdev.h>
1da177e4
LT		 50#include <linux/genhd.h>
51#include <linux/hdreg.h>
52#include <linux/interrupt.h>
e108cebb 53#include <linux/log2.h>
1da177e4
LT		 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>
c9346151 59#include <linux/bitops.h>
e443343e 60#include <linux/blk-mq.h>
1da177e4 61
68b781fe
SH		 62/* DASD discipline magic */
63#define DASD_ECKD_MAGIC 0xC5C3D2C4
64#define DASD_DIAG_MAGIC 0xC4C9C1C7
65#define DASD_FBA_MAGIC 0xC6C2C140
66
1da177e4
LT		 67/*
68 * SECTION: Type definitions
69 */
70struct dasd_device;
8e09f215 71struct dasd_block;
1da177e4
LT		 72
73/* BIT DEFINITIONS FOR SENSE DATA */
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
f60c768c
SH		 79/* BIT DEFINITIONS FOR SIM SENSE */
80#define DASD_SIM_SENSE 0x0F
81#define DASD_SIM_MSG_TO_OP 0x03
82#define DASD_SIM_LOG 0x0C
83
2dedf0d9
SH		 84/* lock class for nested cdev lock */
85#define CDEV_NESTED_FIRST 1
86#define CDEV_NESTED_SECOND 2
87
1da177e4
LT		 88/*
89 * SECTION: MACROs for klogd and s390 debug feature (dbf)
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
1da177e4
LT		 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
b8ed5dd5
SH		 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
fc19f381
SH		 117/* limit size for an errorstring */
118#define ERRORLENGTH 30
119
1da177e4
LT		 120/* definition of dbf debug levels */
121#define DBF_EMERG 0 /* system is unusable */
122#define DBF_ALERT 1 /* action must be taken immediately */
123#define DBF_CRIT 2 /* critical conditions */
124#define DBF_ERR 3 /* error conditions */
125#define DBF_WARNING 4 /* warning conditions */
126#define DBF_NOTICE 5 /* normal but significant condition */
127#define DBF_INFO 6 /* informational */
128#define DBF_DEBUG 6 /* debug-level messages */
129
130/* messages to be written via klogd and dbf */
131#define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\
132do { \
133 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
2a0217d5 134 dev_name(&d_device->cdev->dev), d_args); \
1da177e4
LT		 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/* messages to be written via klogd only */
145#define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\
146do { \
147 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
2a0217d5 148 dev_name(&d_device->cdev->dev), d_args); \
1da177e4
LT		 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
28b841b3
JH		 156/* Macro to calculate number of blocks per page */
157#define BLOCKS_PER_PAGE(blksize) (PAGE_SIZE / blksize)
158
1da177e4
LT		 159struct dasd_ccw_req {
160 unsigned int magic; /* Eye catcher */
61d38832 161 int intrc; /* internal error, e.g. from start_IO */
8e09f215
SW		 162 struct list_head devlist; /* for dasd_device request queue */
163 struct list_head blocklist; /* for dasd_block request queue */
8e09f215
SW		 164 struct dasd_block *block; /* the originating block device */
165 struct dasd_device *memdev; /* the device used to allocate this */
166 struct dasd_device *startdev; /* device the request is started on */
29b8dd9d 167 struct dasd_device *basedev; /* base device if no block->base */
f3eb5384 168 void *cpaddr; /* address of ccw or tcw */
61d38832 169 short retries; /* A retry counter */
f3eb5384 170 unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */
8e09f215 171 char status; /* status of this request */
61d38832 172 char lpm; /* logical path mask */
1da177e4 173 unsigned long flags; /* flags of this request */
e443343e 174 struct dasd_queue *dq;
1da177e4 175 unsigned long starttime; /* jiffies time of request start */
7c8faa86 176 unsigned long expires; /* expiration period in jiffies */
1da177e4 177 void *data; /* pointer to data area */
1da177e4
LT		 178 struct irb irb; /* device status in case of an error */
179 struct dasd_ccw_req *refers; /* ERP-chain queueing. */
180 void *function; /* originating ERP action */
c5205f2f 181 void *mem_chunk;
1da177e4 182
7bf76f01
JH		 183 unsigned long buildclk; /* TOD-clock of request generation */
184 unsigned long startclk; /* TOD-clock of request start */
185 unsigned long stopclk; /* TOD-clock of request interrupt */
186 unsigned long endclk; /* TOD-clock of request termination */
1da177e4 187
8e09f215
SW		 188 void (*callback)(struct dasd_ccw_req *, void *data);
189 void *callback_data;
5e6bdd37 190 unsigned int proc_bytes; /* bytes for partial completion */
1da177e4
LT		 191};
192
138c014d 193/*
1da177e4
LT		 194 * dasd_ccw_req -> status can be:
195 */
8e09f215
SW		 196#define DASD_CQR_FILLED 0x00 /* request is ready to be processed */
197#define DASD_CQR_DONE 0x01 /* request is completed successfully */
198#define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */
199#define DASD_CQR_IN_ERP 0x03 /* request is in recovery */
200#define DASD_CQR_FAILED 0x04 /* request is finally failed */
201#define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */
202
203#define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */
204#define DASD_CQR_IN_IO 0x81 /* request is currently in IO */
205#define DASD_CQR_ERROR 0x82 /* request is completed with error */
206#define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */
207#define DASD_CQR_CLEARED 0x84 /* request was cleared */
73ac36ea 208#define DASD_CQR_SUCCESS 0x85 /* request was successful */
8e09f215 209
7c8faa86
SH		 210/* default expiration time*/
211#define DASD_EXPIRES 300
212#define DASD_EXPIRES_MAX 40000000
1f1ee9ad
HR		 213#define DASD_RETRIES 256
214#define DASD_RETRIES_MAX 32768
1da177e4
LT		 215
216/* per dasd_ccw_req flags */
217#define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */
1c01b8a5 218#define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */
a4d26c6a 219#define DASD_CQR_VERIFY_PATH 2 /* path verification request */
5a27e60d
SW		 220#define DASD_CQR_ALLOW_SLOCK 3 /* Try this request even when lock was
221 * stolen. Should not be combined with
222 * DASD_CQR_FLAGS_USE_ERP
223 */
8fd57520
JH		 224/*
225 * The following flags are used to suppress output of certain errors.
8fd57520
JH		 226 */
227#define DASD_CQR_SUPPRESS_NRF 4 /* Suppress 'No Record Found' error */
228#define DASD_CQR_SUPPRESS_FP 5 /* Suppress 'File Protected' error*/
229#define DASD_CQR_SUPPRESS_IL 6 /* Suppress 'Incorrect Length' error */
ab24fbd3 230#define DASD_CQR_SUPPRESS_CR 7 /* Suppress 'Command Reject' error */
1da177e4 231
e443343e
SH		 232#define DASD_REQ_PER_DEV 4
233
1da177e4
LT		 234/* Signature for error recovery functions. */
235typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *);
236
46d1c03c
JH		 237/*
238 * A single CQR can only contain a maximum of 255 CCWs. It is limited by
239 * the locate record and locate record extended count value which can only hold
240 * 1 Byte max.
241 */
242#define DASD_CQR_MAX_CCW 255
243
2dedf0d9
SH		 244/*
245 * Unique identifier for dasd device.
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
1da177e4
LT		 262/*
263 * the struct dasd_discipline is
264 * sth like a table of virtual functions, if you think of dasd_eckd
265 * inheriting dasd...
266 * no, currently we are not planning to reimplement the driver in C++
267 */
268struct dasd_discipline {
269 struct module *owner;
270 char ebcname[8]; /* a name used for tagging and printks */
271 char name[8]; /* a name used for tagging and printks */
1da177e4
LT		 272
273 struct list_head list; /* used for list of disciplines */
274
8e09f215
SW		 275 /*
276 * Device recognition functions. check_device is used to verify
277 * the sense data and the information returned by read device
278 * characteristics. It returns 0 if the discipline can be used
279 * for the device in question. uncheck_device is called during
280 * device shutdown to deregister a device from its discipline.
281 */
282 int (*check_device) (struct dasd_device *);
283 void (*uncheck_device) (struct dasd_device *);
284
285 /*
286 * do_analysis is used in the step from device state "basic" to
287 * state "accept". It returns 0 if the device can be made ready,
288 * it returns -EMEDIUMTYPE if the device can't be made ready or
289 * -EAGAIN if do_analysis started a ccw that needs to complete
290 * before the analysis may be repeated.
291 */
292 int (*do_analysis) (struct dasd_block *);
293
a4d26c6a
SW		 294 /*
295 * This function is called, when new paths become available.
296 * Disciplins may use this callback to do necessary setup work,
297 * e.g. verify that new path is compatible with the current
298 * configuration.
299 */
300 int (*verify_path)(struct dasd_device *, __u8);
301
8e09f215
SW		 302 /*
303 * Last things to do when a device is set online, and first things
304 * when it is set offline.
305 */
d42e1712 306 int (*basic_to_ready) (struct dasd_device *);
8e09f215 307 int (*online_to_ready) (struct dasd_device *);
daa991bf 308 int (*basic_to_known)(struct dasd_device *);
8e09f215 309
a0610a8a
JH		 310 /*
311 * Initialize block layer request queue.
312 */
313 void (*setup_blk_queue)(struct dasd_block *);
d42e1712 314 /* (struct dasd_device *);
8e09f215
SW		 315 * Device operation functions. build_cp creates a ccw chain for
316 * a block device request, start_io starts the request and
317 * term_IO cancels it (e.g. in case of a timeout). format_device
8fd57520
JH		 318 * formats the device and check_device_format compares the format of
319 * a device with the expected format_data.
8e09f215
SW		 320 * handle_terminated_request allows to examine a cqr and prepare
321 * it for retry.
322 */
1da177e4 323 struct dasd_ccw_req *(*build_cp) (struct dasd_device *,
8e09f215 324 struct dasd_block *,
1da177e4
LT		 325 struct request *);
326 int (*start_IO) (struct dasd_ccw_req *);
327 int (*term_IO) (struct dasd_ccw_req *);
8e09f215 328 void (*handle_terminated_request) (struct dasd_ccw_req *);
d42e1712 329 int (*format_device) (struct dasd_device *,
8fd57520
JH		 330 struct format_data_t *, int);
331 int (*check_device_format)(struct dasd_device *,
332 struct format_check_t *, int);
1da177e4 333 int (*free_cp) (struct dasd_ccw_req *, struct request *);
8e09f215
SW		 334
335 /*
336 * Error recovery functions. examine_error() returns a value that
337 * indicates what to do for an error condition. If examine_error()
138c014d 338 * returns 'dasd_era_recover' erp_action() is called to create a
8e09f215
SW		 339 * special error recovery ccw. erp_postaction() is called after
340 * an error recovery ccw has finished its execution. dump_sense
341 * is called for every error condition to print the sense data
342 * to the console.
343 */
1da177e4
LT		 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 *);
aeec92ca 348 void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *);
5a27e60d
SW		 349 void (*check_for_device_change) (struct dasd_device *,
350 struct dasd_ccw_req *,
351 struct irb *);
8e09f215 352
1da177e4 353 /* i/o control functions. */
8e09f215 354 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *);
1da177e4 355 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *);
8e09f215 356 int (*ioctl) (struct dasd_block *, unsigned int, void __user *);
d41dd122
SH		 357
358 /* suspend/resume functions */
359 int (*freeze) (struct dasd_device *);
360 int (*restore) (struct dasd_device *);
501183f2
SH		 361
362 /* reload device after state change */
363 int (*reload) (struct dasd_device *);
2dedf0d9
SH		 364
365 int (*get_uid) (struct dasd_device *, struct dasd_uid *);
f1633031 366 void (*kick_validate) (struct dasd_device *);
5db8440c 367 int (*check_attention)(struct dasd_device *, __u8);
5a3b7b11
SH		 368 int (*host_access_count)(struct dasd_device *);
369 int (*hosts_print)(struct dasd_device *, struct seq_file *);
a521b048
SH		 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);
c729696b
JH		 374
375 /*
376 * Extent Space Efficient (ESE) relevant functions
377 */
378 int (*is_ese)(struct dasd_device *);
379 /* Capacity */
380 int (*space_allocated)(struct dasd_device *);
381 int (*space_configured)(struct dasd_device *);
382 int (*logical_capacity)(struct dasd_device *);
91dc4a19 383 int (*release_space)(struct dasd_device *, struct format_data_t *);
c729696b
JH		 384 /* Extent Pool */
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 *);
9e12e54c 390 int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *);
5e6bdd37
SH		 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 *);
1da177e4
LT		 394};
395
396extern struct dasd_discipline *dasd_diag_discipline_pointer;
397
20c64468
SW		 398/*
399 * Notification numbers for extended error reporting notifications:
400 * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's
401 * eer pointer) is freed. The error reporting module needs to do all necessary
402 * cleanup steps.
403 * The DASD_EER_TRIGGER notification sends the actual error reports (triggers).
404 */
405#define DASD_EER_DISABLE 0
406#define DASD_EER_TRIGGER 1
407
408/* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */
409#define DASD_EER_FATALERROR 1
410#define DASD_EER_NOPATH 2
411#define DASD_EER_STATECHANGE 3
412#define DASD_EER_PPRCSUSPEND 4
9e12e54c 413#define DASD_EER_NOSPC 5
20c64468 414
c9346151
SH		 415/* DASD path handling */
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
a521b048 424#define DASD_PATH_IFCC 8
c9346151 425
a521b048
SH		 426#define DASD_THRHLD_MAX 4294967295U
427#define DASD_INTERVAL_MAX 4294967295U
c9346151 428
a4d26c6a 429struct dasd_path {
c9346151 430 unsigned long flags;
a521b048
SH		 431 u8 cssid;
432 u8 ssid;
433 u8 chpid;
c9346151 434 struct dasd_conf_data *conf_data;
a521b048 435 atomic_t error_count;
7bf76f01 436 unsigned long errorclk;
a4d26c6a
SW		 437};
438
c9346151 439
4fa52aa7
SW		 440struct dasd_profile_info {
441 /* legacy part of profile data, as in dasd_profile_info_t */
442 unsigned int dasd_io_reqs; /* number of requests processed */
443 unsigned int dasd_io_sects; /* number of sectors processed */
444 unsigned int dasd_io_secs[32]; /* histogram of request's sizes */
445 unsigned int dasd_io_times[32]; /* histogram of requests's times */
446 unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */
447 unsigned int dasd_io_time1[32]; /* hist. of time from build to start */
448 unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */
449 unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */
450 unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */
451 unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */
452
453 /* new data */
bd7a9b37 454 struct timespec64 starttod; /* time of start or last reset */
4fa52aa7
SW		 455 unsigned int dasd_io_alias; /* requests using an alias */
456 unsigned int dasd_io_tpm; /* requests using transport mode */
457 unsigned int dasd_read_reqs; /* total number of read requests */
458 unsigned int dasd_read_sects; /* total number read sectors */
459 unsigned int dasd_read_alias; /* read request using an alias */
460 unsigned int dasd_read_tpm; /* read requests in transport mode */
461 unsigned int dasd_read_secs[32]; /* histogram of request's sizes */
462 unsigned int dasd_read_times[32]; /* histogram of requests's times */
463 unsigned int dasd_read_time1[32]; /* hist. time from build to start */
464 unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */
465 unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */
466 unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */
d2907225
SH		 467 unsigned long dasd_sum_times; /* sum of request times */
468 unsigned long dasd_sum_time_str; /* sum of time from build to start */
469 unsigned long dasd_sum_time_irq; /* sum of time from start to irq */
470 unsigned long dasd_sum_time_end; /* sum of time from irq to end */
4fa52aa7
SW		 471};
472
473struct dasd_profile {
474 struct dentry *dentry;
475 struct dasd_profile_info *data;
476 spinlock_t lock;
477};
478
5e6bdd37
SH		 479struct dasd_format_entry {
480 struct list_head list;
481 sector_t track;
482};
483
1da177e4
LT		 484struct dasd_device {
485 /* Block device stuff. */
8e09f215
SW		 486 struct dasd_block *block;
487
1da177e4 488 unsigned int devindex;
138c014d
HH		 489 unsigned long flags; /* per device flags */
490 unsigned short features; /* copy of devmap-features (read-only!) */
1da177e4 491
20c64468
SW		 492 /* extended error reporting stuff (eer) */
493 struct dasd_ccw_req *eer_cqr;
494
1da177e4
LT		 495 /* Device discipline stuff. */
496 struct dasd_discipline *discipline;
aa88861f 497 struct dasd_discipline *base_discipline;
543691a4 498 void *private;
c9346151
SH		 499 struct dasd_path path[8];
500 __u8 opm;
1da177e4
LT		 501
502 /* Device state and target state. */
503 int state, target;
9eb25122 504 struct mutex state_mutex;
1da177e4
LT		 505 int stopped; /* device (ccw_device_start) was stopped */
506
8e09f215 507 /* reference count. */
1da177e4 508 atomic_t ref_count;
1da177e4
LT		 509
510 /* ccw queue and memory for static ccw/erp buffers. */
511 struct list_head ccw_queue;
512 spinlock_t mem_lock;
513 void *ccw_mem;
514 void *erp_mem;
5e2b17e7 515 void *ese_mem;
1da177e4
LT		 516 struct list_head ccw_chunks;
517 struct list_head erp_chunks;
5e2b17e7 518 struct list_head ese_chunks;
1da177e4
LT		 519
520 atomic_t tasklet_scheduled;
521 struct tasklet_struct tasklet;
522 struct work_struct kick_work;
d41dd122 523 struct work_struct restore_device;
501183f2 524 struct work_struct reload_device;
f1633031 525 struct work_struct kick_validate;
59a9ed5f 526 struct work_struct suc_work;
a521b048 527 struct work_struct requeue_requests;
1da177e4
LT		 528 struct timer_list timer;
529
530 debug_info_t *debug_area;
531
532 struct ccw_device *cdev;
533
8e09f215
SW		 534 /* hook for alias management */
535 struct list_head alias_list;
7c8faa86
SH		 536
537 /* default expiration time in s */
538 unsigned long default_expires;
1f1ee9ad 539 unsigned long default_retries;
4fa52aa7 540
3d71ad32
HR		 541 unsigned long blk_timeout;
542
a521b048
SH		 543 unsigned long path_thrhld;
544 unsigned long path_interval;
545
4fa52aa7 546 struct dentry *debugfs_dentry;
5a3b7b11 547 struct dentry *hosts_dentry;
4fa52aa7 548 struct dasd_profile profile;
5e6bdd37 549 struct dasd_format_entry format_entry;
8e09f215
SW		 550};
551
552struct dasd_block {
553 /* Block device stuff. */
554 struct gendisk *gdp;
555 struct request_queue *request_queue;
556 spinlock_t request_queue_lock;
e443343e 557 struct blk_mq_tag_set tag_set;
8e09f215
SW		 558 struct block_device *bdev;
559 atomic_t open_count;
560
7bf76f01 561 unsigned long blocks; /* size of volume in blocks */
8e09f215
SW		 562 unsigned int bp_block; /* bytes per block */
563 unsigned int s2b_shift; /* log2 (bp_block/512) */
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
4fa52aa7
SW		 573 struct dentry *debugfs_dentry;
574 struct dasd_profile profile;
5e6bdd37
SH		 575
576 struct list_head format_list;
577 spinlock_t format_lock;
1da177e4
LT		 578};
579
5db8440c
SH		 580struct dasd_attention_data {
581 struct dasd_device *device;
582 __u8 lpum;
583};
8e09f215 584
e443343e
SH		 585struct dasd_queue {
586 spinlock_t lock;
587};
588
1da177e4
LT		 589/* reasons why device (ccw_device_start) was stopped */
590#define DASD_STOPPED_NOT_ACC 1 /* not accessible */
591#define DASD_STOPPED_QUIESCE 2 /* Quiesced */
592#define DASD_STOPPED_PENDING 4 /* long busy */
593#define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */
8e09f215 594#define DASD_STOPPED_SU 16 /* summary unit check handling */
d41dd122
SH		 595#define DASD_STOPPED_PM 32 /* pm state transition */
596#define DASD_UNRESUMED_PM 64 /* pm resume failed state */
9e12e54c 597#define DASD_STOPPED_NOSPC 128 /* no space left */
1da177e4
LT		 598
599/* per device flags */
1da177e4 600#define DASD_FLAG_OFFLINE 3 /* device is in offline processing */
20c64468
SW		 601#define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */
602#define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */
33b62a30
SW		 603#define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't
604 * confuse this with the user specified
605 * read-only feature.
606 */
5a27e60d
SW		 607#define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */
608#define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */
c8d1c0ff 609#define DASD_FLAG_SUSPENDED 9 /* The device was suspended */
d07dc5d8
SH		 610#define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/
611#define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */
5ea34a01 612#define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */
1eb38023 613#define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */
59a9ed5f 614#define DASD_FLAG_SUC 14 /* unhandled summary unit check */
5a27e60d 615
5ea34a01
HR		 616#define DASD_SLEEPON_START_TAG ((void *) 1)
617#define DASD_SLEEPON_END_TAG ((void *) 2)
1da177e4
LT		 618
619void dasd_put_device_wake(struct dasd_device *);
620
621/*
622 * Reference count inliners
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 * The static memory in ccw_mem and erp_mem is managed by a sorted
639 * list of free memory chunks.
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 /* Find out the left neighbour in chunk_list. */
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 /* Try to merge with right neighbour = next element from left. */
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 /* Try to merge with left neighbour. */
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 * Check if bsize is in { 512, 1024, 2048, 4096 }
717 */
718static inline int
719dasd_check_blocksize(int bsize)
720{
e108cebb 721 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize))
1da177e4
LT		 722 return -EMEDIUMTYPE;
723 return 0;
724}
725
726/* externals in dasd.c */
4fa52aa7
SW		 727#define DASD_PROFILE_OFF 0
728#define DASD_PROFILE_ON 1
729#define DASD_PROFILE_GLOBAL_ONLY 2
1da177e4
LT		 730
731extern debug_info_t *dasd_debug_area;
8ea55c95 732extern struct dasd_profile dasd_global_profile;
4fa52aa7 733extern unsigned int dasd_global_profile_level;
83d5cde4 734extern const struct block_device_operations dasd_device_operations;
1da177e4 735
e18b890b 736extern struct kmem_cache *dasd_page_cache;
1da177e4 737
1da177e4 738struct dasd_ccw_req *
c5205f2f 739dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *);
5e2b17e7 740struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *);
1da177e4 741void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *);
5e2b17e7 742void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *);
5915a873 743void dasd_wakeup_cb(struct dasd_ccw_req *, void *);
1da177e4 744
1da177e4
LT		 745struct dasd_device *dasd_alloc_device(void);
746void dasd_free_device(struct dasd_device *);
747
8e09f215
SW		 748struct dasd_block *dasd_alloc_block(void);
749void dasd_free_block(struct dasd_block *);
750
e443343e 751enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved);
3d71ad32 752
1da177e4
LT		 753void dasd_enable_device(struct dasd_device *);
754void dasd_set_target_state(struct dasd_device *, int);
755void dasd_kick_device(struct dasd_device *);
d41dd122 756void dasd_restore_device(struct dasd_device *);
501183f2 757void dasd_reload_device(struct dasd_device *);
a521b048 758void dasd_schedule_requeue(struct dasd_device *);
1da177e4
LT		 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 *);
8e09f215
SW		 764void dasd_schedule_device_bh(struct dasd_device *);
765void dasd_schedule_block_bh(struct dasd_block *);
1da177e4 766int dasd_sleep_on(struct dasd_ccw_req *);
d42e1712 767int dasd_sleep_on_queue(struct list_head *);
1da177e4 768int dasd_sleep_on_immediatly(struct dasd_ccw_req *);
bcf36768 769int dasd_sleep_on_queue_interruptible(struct list_head *);
1da177e4 770int dasd_sleep_on_interruptible(struct dasd_ccw_req *);
8e09f215
SW		 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 *);
1da177e4 775int dasd_cancel_req(struct dasd_ccw_req *);
8e09f215 776int dasd_flush_device_queue(struct dasd_device *);
1da177e4 777int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *);
c020d722 778void dasd_generic_free_discipline(struct dasd_device *);
1da177e4
LT		 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);
a4d26c6a
SW		 783int dasd_generic_last_path_gone(struct dasd_device *);
784int dasd_generic_path_operational(struct dasd_device *);
4679e893 785void dasd_generic_shutdown(struct ccw_device *);
a4d26c6a 786
8e09f215 787void dasd_generic_handle_state_change(struct dasd_device *);
d41dd122
SH		 788int dasd_generic_pm_freeze(struct ccw_device *);
789int dasd_generic_restore_device(struct ccw_device *);
a23ed009 790enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *);
a4d26c6a
SW		 791void dasd_generic_path_event(struct ccw_device *, int *);
792int dasd_generic_verify_path(struct dasd_device *, __u8);
9e12e54c
JH		 793void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *);
794void dasd_generic_space_avail(struct dasd_device *);
1da177e4 795
68b781fe 796int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int);
f3eb5384 797char *dasd_get_sense(struct irb *);
17283b56 798
eb6e199b
SW		 799void dasd_device_set_stop_bits(struct dasd_device *, int);
800void dasd_device_remove_stop_bits(struct dasd_device *, int);
801
33b62a30
SW		 802int dasd_device_is_ro(struct dasd_device *);
803
4fa52aa7
SW		 804void dasd_profile_reset(struct dasd_profile *);
805int dasd_profile_on(struct dasd_profile *);
806void dasd_profile_off(struct dasd_profile *);
4fa52aa7 807char *dasd_get_user_string(const char __user *, size_t);
33b62a30 808
1da177e4
LT		 809/* externals in dasd_devmap.c */
810extern int dasd_max_devindex;
811extern int dasd_probeonly;
812extern int dasd_autodetect;
40545573 813extern int dasd_nopav;
f3eb5384 814extern int dasd_nofcx;
1da177e4
LT		 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
f24acd45
HH		 822int dasd_get_feature(struct ccw_device *, int);
823int dasd_set_feature(struct ccw_device *, int, int);
824
1da177e4
LT		 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 *);
a00bfd71 829struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *);
1da177e4
LT		 830struct dasd_device *dasd_device_from_devindex(int);
831
65f8da47
SW		 832void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *);
833struct dasd_device *dasd_device_from_gendisk(struct gendisk *);
834
3b1bea01 835int dasd_parse(void) __init;
69f90f6a 836int dasd_busid_known(const char *);
1da177e4
LT		 837
838/* externals in dasd_gendisk.c */
839int dasd_gendisk_init(void);
840void dasd_gendisk_exit(void);
8e09f215
SW		 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 *);
1da177e4
LT		 845
846/* externals in dasd_ioctl.c */
2c1b6ec1
CH		 847int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long);
848int dasd_set_read_only(struct block_device *bdev, bool ro);
1da177e4
LT		 849
850/* externals in dasd_proc.c */
851int dasd_proc_init(void);
852void dasd_proc_exit(void);
853
854/* externals in dasd_erp.c */
855struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *);
856struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *);
857struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int,
858 struct dasd_device *);
859void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *);
860void dasd_log_sense(struct dasd_ccw_req *, struct irb *);
fc19f381 861void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb);
1da177e4 862
1da177e4 863/* externals in dasd_3990_erp.c */
1da177e4 864struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *);
f60c768c 865void dasd_3990_erp_handle_sim(struct dasd_device *, char *);
1da177e4 866
20c64468
SW		 867/* externals in dasd_eer.c */
868#ifdef CONFIG_DASD_EER
869int dasd_eer_init(void);
870void dasd_eer_exit(void);
871int dasd_eer_enable(struct dasd_device *);
872void dasd_eer_disable(struct dasd_device *);
873void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr,
874 unsigned int id);
875void dasd_eer_snss(struct dasd_device *);
876
877static inline int dasd_eer_enabled(struct dasd_device *device)
878{
879 return device->eer_cqr != NULL;
880}
881#else
882#define dasd_eer_init() (0)
883#define dasd_eer_exit() do { } while (0)
884#define dasd_eer_enable(d) (0)
885#define dasd_eer_disable(d) do { } while (0)
886#define dasd_eer_write(d,c,i) do { } while (0)
887#define dasd_eer_snss(d) do { } while (0)
888#define dasd_eer_enabled(d) (0)
889#endif /* CONFIG_DASD_ERR */
890
c9346151
SH		 891
892/* DASD path handling functions */
893
894/*
895 * helper functions to modify bit masks for a given channel path for a device
896 */
897static inline int dasd_path_is_operational(struct dasd_device *device, int chp)
898{
899 return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
900}
901
902static inline int dasd_path_need_verify(struct dasd_device *device, int chp)
903{
904 return test_bit(DASD_PATH_TBV, &device->path[chp].flags);
905}
906
907static inline void dasd_path_verify(struct dasd_device *device, int chp)
908{
909 __set_bit(DASD_PATH_TBV, &device->path[chp].flags);
910}
911
912static inline void dasd_path_clear_verify(struct dasd_device *device, int chp)
913{
914 __clear_bit(DASD_PATH_TBV, &device->path[chp].flags);
915}
916
917static inline void dasd_path_clear_all_verify(struct dasd_device *device)
918{
919 int chp;
920
921 for (chp = 0; chp < 8; chp++)
922 dasd_path_clear_verify(device, chp);
923}
924
925static inline void dasd_path_operational(struct dasd_device *device, int chp)
926{
927 __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
928 device->opm |= (0x80 >> chp);
929}
930
931static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp)
932{
933 __set_bit(DASD_PATH_NPP, &device->path[chp].flags);
934}
935
936static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp)
937{
938 return test_bit(DASD_PATH_NPP, &device->path[chp].flags);
939}
940
941static inline void dasd_path_clear_nonpreferred(struct dasd_device *device,
942 int chp)
943{
944 __clear_bit(DASD_PATH_NPP, &device->path[chp].flags);
945}
946
947static inline void dasd_path_preferred(struct dasd_device *device, int chp)
948{
949 __set_bit(DASD_PATH_PP, &device->path[chp].flags);
950}
951
952static inline int dasd_path_is_preferred(struct dasd_device *device, int chp)
953{
954 return test_bit(DASD_PATH_PP, &device->path[chp].flags);
955}
956
957static inline void dasd_path_clear_preferred(struct dasd_device *device,
958 int chp)
959{
960 __clear_bit(DASD_PATH_PP, &device->path[chp].flags);
961}
962
963static inline void dasd_path_clear_oper(struct dasd_device *device, int chp)
964{
965 __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
966 device->opm &= ~(0x80 >> chp);
967}
968
969static inline void dasd_path_clear_cable(struct dasd_device *device, int chp)
970{
971 __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
972}
973
974static inline void dasd_path_cuir(struct dasd_device *device, int chp)
975{
976 __set_bit(DASD_PATH_CUIR, &device->path[chp].flags);
977}
978
979static inline int dasd_path_is_cuir(struct dasd_device *device, int chp)
980{
981 return test_bit(DASD_PATH_CUIR, &device->path[chp].flags);
982}
983
984static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp)
985{
986 __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags);
987}
988
a521b048
SH		 989static inline void dasd_path_ifcc(struct dasd_device *device, int chp)
990{
991 set_bit(DASD_PATH_IFCC, &device->path[chp].flags);
992}
993
994static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp)
995{
996 return test_bit(DASD_PATH_IFCC, &device->path[chp].flags);
997}
998
999static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp)
1000{
1001 clear_bit(DASD_PATH_IFCC, &device->path[chp].flags);
1002}
1003
c9346151
SH		 1004static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp)
1005{
1006 __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
1007}
1008
1009static inline void dasd_path_miscabled(struct dasd_device *device, int chp)
1010{
1011 __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
1012}
1013
1014static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp)
1015{
1016 return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
1017}
1018
1019static inline void dasd_path_nohpf(struct dasd_device *device, int chp)
1020{
1021 __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
1022}
1023
1024static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp)
1025{
1026 return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
1027}
1028
1029/*
1030 * get functions for path masks
1031 * will return a path masks for the given device
1032 */
1033
1034static inline __u8 dasd_path_get_opm(struct dasd_device *device)
1035{
1036 return device->opm;
1037}
1038
1039static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device)
1040{
1041 int chp;
1042 __u8 tbvpm = 0x00;
1043
1044 for (chp = 0; chp < 8; chp++)
1045 if (dasd_path_need_verify(device, chp))
1046 tbvpm |= 0x80 >> chp;
1047 return tbvpm;
1048}
1049
1050static inline __u8 dasd_path_get_nppm(struct dasd_device *device)
1051{
1052 int chp;
1053 __u8 npm = 0x00;
1054
1055 for (chp = 0; chp < 8; chp++) {
1056 if (dasd_path_is_nonpreferred(device, chp))
1057 npm |= 0x80 >> chp;
1058 }
1059 return npm;
1060}
1061
1062static inline __u8 dasd_path_get_ppm(struct dasd_device *device)
1063{
1064 int chp;
1065 __u8 ppm = 0x00;
1066
1067 for (chp = 0; chp < 8; chp++)
1068 if (dasd_path_is_preferred(device, chp))
1069 ppm |= 0x80 >> chp;
1070 return ppm;
1071}
1072
1073static inline __u8 dasd_path_get_cablepm(struct dasd_device *device)
1074{
1075 int chp;
1076 __u8 cablepm = 0x00;
1077
1078 for (chp = 0; chp < 8; chp++)
1079 if (dasd_path_is_miscabled(device, chp))
1080 cablepm |= 0x80 >> chp;
1081 return cablepm;
1082}
1083
1084static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device)
1085{
1086 int chp;
1087 __u8 cuirpm = 0x00;
1088
1089 for (chp = 0; chp < 8; chp++)
1090 if (dasd_path_is_cuir(device, chp))
1091 cuirpm |= 0x80 >> chp;
1092 return cuirpm;
1093}
1094
a521b048
SH		 1095static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device)
1096{
1097 int chp;
1098 __u8 ifccpm = 0x00;
1099
1100 for (chp = 0; chp < 8; chp++)
1101 if (dasd_path_is_ifcc(device, chp))
1102 ifccpm |= 0x80 >> chp;
1103 return ifccpm;
1104}
1105
c9346151
SH		 1106static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device)
1107{
1108 int chp;
1109 __u8 hpfpm = 0x00;
1110
1111 for (chp = 0; chp < 8; chp++)
1112 if (dasd_path_is_nohpf(device, chp))
1113 hpfpm |= 0x80 >> chp;
1114 return hpfpm;
1115}
1116
1117/*
1118 * add functions for path masks
1119 * the existing path mask will be extended by the given path mask
1120 */
1121static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm)
1122{
1123 int chp;
1124
1125 for (chp = 0; chp < 8; chp++)
1126 if (pm & (0x80 >> chp))
1127 dasd_path_verify(device, chp);
1128}
1129
a521b048
SH		 1130static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device)
1131{
1132 int chp;
1133 __u8 nopm = 0x00;
1134
1135 for (chp = 0; chp < 8; chp++)
1136 if (dasd_path_is_nohpf(device, chp) ||
1137 dasd_path_is_ifcc(device, chp) ||
1138 dasd_path_is_cuir(device, chp) ||
1139 dasd_path_is_miscabled(device, chp))
1140 nopm |= 0x80 >> chp;
1141 return nopm;
1142}
1143
c9346151
SH		 1144static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm)
1145{
1146 int chp;
1147
1148 for (chp = 0; chp < 8; chp++)
1149 if (pm & (0x80 >> chp)) {
1150 dasd_path_operational(device, chp);
1151 /*
1152 * if the path is used
1153 * it should not be in one of the negative lists
1154 */
1155 dasd_path_clear_nohpf(device, chp);
1156 dasd_path_clear_cuir(device, chp);
1157 dasd_path_clear_cable(device, chp);
a521b048 1158 dasd_path_clear_ifcc(device, chp);
c9346151
SH		 1159 }
1160}
1161
1162static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm)
1163{
1164 int chp;
1165
1166 for (chp = 0; chp < 8; chp++)
1167 if (pm & (0x80 >> chp))
1168 dasd_path_miscabled(device, chp);
1169}
1170
1171static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm)
1172{
1173 int chp;
1174
1175 for (chp = 0; chp < 8; chp++)
1176 if (pm & (0x80 >> chp))
1177 dasd_path_cuir(device, chp);
1178}
1179
a521b048
SH		 1180static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm)
1181{
1182 int chp;
1183
1184 for (chp = 0; chp < 8; chp++)
1185 if (pm & (0x80 >> chp))
1186 dasd_path_ifcc(device, chp);
1187}
1188
c9346151
SH		 1189static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm)
1190{
1191 int chp;
1192
1193 for (chp = 0; chp < 8; chp++)
1194 if (pm & (0x80 >> chp))
1195 dasd_path_nonpreferred(device, chp);
1196}
1197
1198static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm)
1199{
1200 int chp;
1201
1202 for (chp = 0; chp < 8; chp++)
1203 if (pm & (0x80 >> chp))
1204 dasd_path_nohpf(device, chp);
1205}
1206
1207static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm)
1208{
1209 int chp;
1210
1211 for (chp = 0; chp < 8; chp++)
1212 if (pm & (0x80 >> chp))
1213 dasd_path_preferred(device, chp);
1214}
1215
1216/*
1217 * set functions for path masks
1218 * the existing path mask will be replaced by the given path mask
1219 */
1220static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm)
1221{
1222 int chp;
1223
1224 for (chp = 0; chp < 8; chp++)
1225 if (pm & (0x80 >> chp))
1226 dasd_path_verify(device, chp);
1227 else
1228 dasd_path_clear_verify(device, chp);
1229}
1230
1231static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm)
1232{
1233 int chp;
1234
1235 for (chp = 0; chp < 8; chp++) {
1236 dasd_path_clear_oper(device, chp);
1237 if (pm & (0x80 >> chp)) {
1238 dasd_path_operational(device, chp);
1239 /*
1240 * if the path is used
1241 * it should not be in one of the negative lists
1242 */
1243 dasd_path_clear_nohpf(device, chp);
1244 dasd_path_clear_cuir(device, chp);
1245 dasd_path_clear_cable(device, chp);
a521b048 1246 dasd_path_clear_ifcc(device, chp);
c9346151
SH		 1247 }
1248 }
1249}
1250
1251/*
1252 * remove functions for path masks
1253 * the existing path mask will be cleared with the given path mask
1254 */
1255static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm)
1256{
1257 int chp;
1258
1259 for (chp = 0; chp < 8; chp++) {
1260 if (pm & (0x80 >> chp))
1261 dasd_path_clear_oper(device, chp);
1262 }
1263}
1264
1265/*
1266 * add the newly available path to the to be verified pm and remove it from
1267 * normal operation until it is verified
1268 */
1269static inline void dasd_path_available(struct dasd_device *device, int chp)
1270{
1271 dasd_path_clear_oper(device, chp);
1272 dasd_path_verify(device, chp);
1273}
1274
1275static inline void dasd_path_notoper(struct dasd_device *device, int chp)
1276{
1277 dasd_path_clear_oper(device, chp);
1278 dasd_path_clear_preferred(device, chp);
1279 dasd_path_clear_nonpreferred(device, chp);
1280}
1281
1282/*
1283 * remove all paths from normal operation
1284 */
1285static inline void dasd_path_no_path(struct dasd_device *device)
1286{
1287 int chp;
1288
1289 for (chp = 0; chp < 8; chp++)
1290 dasd_path_notoper(device, chp);
1291
1292 dasd_path_clear_all_verify(device);
1293}
1294
1295/* end - path handling */
1296
1da177e4 1297#endif /* DASD_H */
Linux 6.x block layer and io_uring tree(s)