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s390/dasd: remove unused DASD EER defines
[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/hdreg.h>
51#include <linux/interrupt.h>
e108cebb 52#include <linux/log2.h>
1da177e4
LT		 53#include <asm/ccwdev.h>
54#include <linux/workqueue.h>
55#include <asm/debug.h>
56#include <asm/dasd.h>
57#include <asm/idals.h>
c9346151 58#include <linux/bitops.h>
e443343e 59#include <linux/blk-mq.h>
1da177e4 60
68b781fe
SH		 61/* DASD discipline magic */
62#define DASD_ECKD_MAGIC 0xC5C3D2C4
63#define DASD_DIAG_MAGIC 0xC4C9C1C7
64#define DASD_FBA_MAGIC 0xC6C2C140
65
1da177e4
LT		 66/*
67 * SECTION: Type definitions
68 */
69struct dasd_device;
8e09f215 70struct dasd_block;
1da177e4
LT		 71
72/* BIT DEFINITIONS FOR SENSE DATA */
73#define DASD_SENSE_BIT_0 0x80
74#define DASD_SENSE_BIT_1 0x40
75#define DASD_SENSE_BIT_2 0x20
76#define DASD_SENSE_BIT_3 0x10
77
f60c768c
SH		 78/* BIT DEFINITIONS FOR SIM SENSE */
79#define DASD_SIM_SENSE 0x0F
80#define DASD_SIM_MSG_TO_OP 0x03
81#define DASD_SIM_LOG 0x0C
82
2dedf0d9
SH		 83/* lock class for nested cdev lock */
84#define CDEV_NESTED_FIRST 1
85#define CDEV_NESTED_SECOND 2
86
1da177e4
LT		 87/*
88 * SECTION: MACROs for klogd and s390 debug feature (dbf)
89 */
90#define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \
91do { \
92 debug_sprintf_event(d_device->debug_area, \
93 d_level, \
94 d_str "\n", \
95 d_data); \
96} while(0)
97
1da177e4
LT		 98#define DBF_EVENT(d_level, d_str, d_data...)\
99do { \
100 debug_sprintf_event(dasd_debug_area, \
101 d_level,\
102 d_str "\n", \
103 d_data); \
104} while(0)
105
b8ed5dd5
SH		 106#define DBF_EVENT_DEVID(d_level, d_cdev, d_str, d_data...) \
107do { \
108 struct ccw_dev_id __dev_id; \
109 ccw_device_get_id(d_cdev, &__dev_id); \
110 debug_sprintf_event(dasd_debug_area, \
111 d_level, \
112 "0.%x.%04x " d_str "\n", \
113 __dev_id.ssid, __dev_id.devno, d_data); \
114} while (0)
115
fc19f381
SH		 116/* limit size for an errorstring */
117#define ERRORLENGTH 30
118
1da177e4
LT		 119/* definition of dbf debug levels */
120#define DBF_EMERG 0 /* system is unusable */
121#define DBF_ALERT 1 /* action must be taken immediately */
122#define DBF_CRIT 2 /* critical conditions */
123#define DBF_ERR 3 /* error conditions */
124#define DBF_WARNING 4 /* warning conditions */
125#define DBF_NOTICE 5 /* normal but significant condition */
126#define DBF_INFO 6 /* informational */
127#define DBF_DEBUG 6 /* debug-level messages */
128
129/* messages to be written via klogd and dbf */
130#define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\
131do { \
132 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
2a0217d5 133 dev_name(&d_device->cdev->dev), d_args); \
1da177e4
LT		 134 DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \
135} while(0)
136
137#define MESSAGE(d_loglevel,d_string,d_args...)\
138do { \
139 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
140 DBF_EVENT(DBF_ALERT, d_string, d_args); \
141} while(0)
142
143/* messages to be written via klogd only */
144#define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\
145do { \
146 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
2a0217d5 147 dev_name(&d_device->cdev->dev), d_args); \
1da177e4
LT		 148} while(0)
149
150#define MESSAGE_LOG(d_loglevel,d_string,d_args...)\
151do { \
152 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
153} while(0)
154
28b841b3
JH		 155/* Macro to calculate number of blocks per page */
156#define BLOCKS_PER_PAGE(blksize) (PAGE_SIZE / blksize)
157
1da177e4
LT		 158struct dasd_ccw_req {
159 unsigned int magic; /* Eye catcher */
61d38832 160 int intrc; /* internal error, e.g. from start_IO */
8e09f215
SW		 161 struct list_head devlist; /* for dasd_device request queue */
162 struct list_head blocklist; /* for dasd_block request queue */
8e09f215
SW		 163 struct dasd_block *block; /* the originating block device */
164 struct dasd_device *memdev; /* the device used to allocate this */
165 struct dasd_device *startdev; /* device the request is started on */
29b8dd9d 166 struct dasd_device *basedev; /* base device if no block->base */
f3eb5384 167 void *cpaddr; /* address of ccw or tcw */
61d38832 168 short retries; /* A retry counter */
f3eb5384 169 unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */
8e09f215 170 char status; /* status of this request */
61d38832 171 char lpm; /* logical path mask */
1da177e4 172 unsigned long flags; /* flags of this request */
e443343e 173 struct dasd_queue *dq;
1da177e4 174 unsigned long starttime; /* jiffies time of request start */
7c8faa86 175 unsigned long expires; /* expiration period in jiffies */
1da177e4 176 void *data; /* pointer to data area */
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 */
c5205f2f 180 void *mem_chunk;
1da177e4 181
7bf76f01
JH		 182 unsigned long buildclk; /* TOD-clock of request generation */
183 unsigned long startclk; /* TOD-clock of request start */
184 unsigned long stopclk; /* TOD-clock of request interrupt */
185 unsigned long endclk; /* TOD-clock of request termination */
1da177e4 186
8e09f215
SW		 187 void (*callback)(struct dasd_ccw_req *, void *data);
188 void *callback_data;
5e6bdd37 189 unsigned int proc_bytes; /* bytes for partial completion */
71f38716 190 unsigned int trkcount; /* count formatted tracks */
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
3f217cce
SH		 262/*
263 * PPRC Status data
264 */
265struct dasd_pprc_header {
266 __u8 entries; /* 0 Number of device entries */
267 __u8 unused; /* 1 unused */
268 __u16 entry_length; /* 2-3 Length of device entry */
269 __u32 unused2; /* 4-7 unused */
270} __packed;
271
272struct dasd_pprc_dev_info {
273 __u8 state; /* 0 Copy State */
274 __u8 flags; /* 1 Flags */
275 __u8 reserved1[2]; /* 2-3 reserved */
276 __u8 prim_lss; /* 4 Primary device LSS */
277 __u8 primary; /* 5 Primary device address */
278 __u8 sec_lss; /* 6 Secondary device LSS */
279 __u8 secondary; /* 7 Secondary device address */
280 __u16 pprc_id; /* 8-9 Peer-to-Peer Remote Copy ID */
281 __u8 reserved2[12]; /* 10-21 reserved */
282 __u16 prim_cu_ssid; /* 22-23 Pimary Control Unit SSID */
283 __u8 reserved3[12]; /* 24-35 reserved */
284 __u16 sec_cu_ssid; /* 36-37 Secondary Control Unit SSID */
285 __u8 reserved4[90]; /* 38-127 reserved */
286} __packed;
287
288struct dasd_pprc_data_sc4 {
289 struct dasd_pprc_header header;
290 struct dasd_pprc_dev_info dev_info[5];
291} __packed;
292
a91ff09d
SH		 293#define DASD_BUS_ID_SIZE 20
294#define DASD_CP_ENTRIES 5
295
296struct dasd_copy_entry {
297 char busid[DASD_BUS_ID_SIZE];
298 struct dasd_device *device;
299 bool primary;
300 bool configured;
301};
302
303struct dasd_copy_relation {
304 struct dasd_copy_entry entry[DASD_CP_ENTRIES];
305 struct dasd_copy_entry *active;
306};
307
308int dasd_devmap_set_device_copy_relation(struct ccw_device *,
309 bool pprc_enabled);
310
1da177e4
LT		 311/*
312 * the struct dasd_discipline is
313 * sth like a table of virtual functions, if you think of dasd_eckd
314 * inheriting dasd...
315 * no, currently we are not planning to reimplement the driver in C++
316 */
317struct dasd_discipline {
318 struct module *owner;
319 char ebcname[8]; /* a name used for tagging and printks */
320 char name[8]; /* a name used for tagging and printks */
1da177e4
LT		 321
322 struct list_head list; /* used for list of disciplines */
323
8e09f215
SW		 324 /*
325 * Device recognition functions. check_device is used to verify
326 * the sense data and the information returned by read device
327 * characteristics. It returns 0 if the discipline can be used
328 * for the device in question. uncheck_device is called during
329 * device shutdown to deregister a device from its discipline.
330 */
331 int (*check_device) (struct dasd_device *);
332 void (*uncheck_device) (struct dasd_device *);
333
334 /*
335 * do_analysis is used in the step from device state "basic" to
336 * state "accept". It returns 0 if the device can be made ready,
337 * it returns -EMEDIUMTYPE if the device can't be made ready or
338 * -EAGAIN if do_analysis started a ccw that needs to complete
339 * before the analysis may be repeated.
340 */
341 int (*do_analysis) (struct dasd_block *);
342
a4d26c6a
SW		 343 /*
344 * This function is called, when new paths become available.
345 * Disciplins may use this callback to do necessary setup work,
346 * e.g. verify that new path is compatible with the current
347 * configuration.
348 */
4d063e64 349 int (*pe_handler)(struct dasd_device *, __u8, __u8);
a4d26c6a 350
8e09f215
SW		 351 /*
352 * Last things to do when a device is set online, and first things
353 * when it is set offline.
354 */
d42e1712 355 int (*basic_to_ready) (struct dasd_device *);
8e09f215 356 int (*online_to_ready) (struct dasd_device *);
daa991bf 357 int (*basic_to_known)(struct dasd_device *);
8e09f215 358
a0610a8a
JH		 359 /*
360 * Initialize block layer request queue.
361 */
362 void (*setup_blk_queue)(struct dasd_block *);
d42e1712 363 /* (struct dasd_device *);
8e09f215
SW		 364 * Device operation functions. build_cp creates a ccw chain for
365 * a block device request, start_io starts the request and
366 * term_IO cancels it (e.g. in case of a timeout). format_device
8fd57520
JH		 367 * formats the device and check_device_format compares the format of
368 * a device with the expected format_data.
8e09f215
SW		 369 * handle_terminated_request allows to examine a cqr and prepare
370 * it for retry.
371 */
1da177e4 372 struct dasd_ccw_req *(*build_cp) (struct dasd_device *,
8e09f215 373 struct dasd_block *,
1da177e4
LT		 374 struct request *);
375 int (*start_IO) (struct dasd_ccw_req *);
376 int (*term_IO) (struct dasd_ccw_req *);
8e09f215 377 void (*handle_terminated_request) (struct dasd_ccw_req *);
d42e1712 378 int (*format_device) (struct dasd_device *,
8fd57520
JH		 379 struct format_data_t *, int);
380 int (*check_device_format)(struct dasd_device *,
381 struct format_check_t *, int);
1da177e4 382 int (*free_cp) (struct dasd_ccw_req *, struct request *);
8e09f215
SW		 383
384 /*
385 * Error recovery functions. examine_error() returns a value that
386 * indicates what to do for an error condition. If examine_error()
138c014d 387 * returns 'dasd_era_recover' erp_action() is called to create a
8e09f215
SW		 388 * special error recovery ccw. erp_postaction() is called after
389 * an error recovery ccw has finished its execution. dump_sense
390 * is called for every error condition to print the sense data
391 * to the console.
392 */
1da177e4
LT		 393 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *);
394 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *);
395 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *,
396 struct irb *);
aeec92ca 397 void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *);
5a27e60d
SW		 398 void (*check_for_device_change) (struct dasd_device *,
399 struct dasd_ccw_req *,
400 struct irb *);
8e09f215 401
1da177e4 402 /* i/o control functions. */
8e09f215 403 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *);
1da177e4 404 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *);
8e09f215 405 int (*ioctl) (struct dasd_block *, unsigned int, void __user *);
d41dd122 406
501183f2
SH		 407 /* reload device after state change */
408 int (*reload) (struct dasd_device *);
2dedf0d9
SH		 409
410 int (*get_uid) (struct dasd_device *, struct dasd_uid *);
f1633031 411 void (*kick_validate) (struct dasd_device *);
5db8440c 412 int (*check_attention)(struct dasd_device *, __u8);
5a3b7b11
SH		 413 int (*host_access_count)(struct dasd_device *);
414 int (*hosts_print)(struct dasd_device *, struct seq_file *);
a521b048
SH		 415 void (*handle_hpf_error)(struct dasd_device *, struct irb *);
416 void (*disable_hpf)(struct dasd_device *);
417 int (*hpf_enabled)(struct dasd_device *);
418 void (*reset_path)(struct dasd_device *, __u8);
c729696b
JH		 419
420 /*
421 * Extent Space Efficient (ESE) relevant functions
422 */
423 int (*is_ese)(struct dasd_device *);
424 /* Capacity */
425 int (*space_allocated)(struct dasd_device *);
426 int (*space_configured)(struct dasd_device *);
427 int (*logical_capacity)(struct dasd_device *);
91dc4a19 428 int (*release_space)(struct dasd_device *, struct format_data_t *);
c729696b
JH		 429 /* Extent Pool */
430 int (*ext_pool_id)(struct dasd_device *);
431 int (*ext_size)(struct dasd_device *);
432 int (*ext_pool_cap_at_warnlevel)(struct dasd_device *);
433 int (*ext_pool_warn_thrshld)(struct dasd_device *);
434 int (*ext_pool_oos)(struct dasd_device *);
9e12e54c 435 int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *);
5e6bdd37
SH		 436 struct dasd_ccw_req *(*ese_format)(struct dasd_device *,
437 struct dasd_ccw_req *, struct irb *);
438 int (*ese_read)(struct dasd_ccw_req *, struct irb *);
3f217cce 439 int (*pprc_status)(struct dasd_device *, struct dasd_pprc_data_sc4 *);
a91ff09d 440 bool (*pprc_enabled)(struct dasd_device *);
413862ca 441 int (*copy_pair_swap)(struct dasd_device *, char *, char *);
32ff8ce0 442 int (*device_ping)(struct dasd_device *);
1da177e4
LT		 443};
444
445extern struct dasd_discipline *dasd_diag_discipline_pointer;
446
861d53db 447/* Trigger IDs for extended error reporting */
20c64468
SW		 448#define DASD_EER_FATALERROR 1
449#define DASD_EER_NOPATH 2
450#define DASD_EER_STATECHANGE 3
451#define DASD_EER_PPRCSUSPEND 4
9e12e54c 452#define DASD_EER_NOSPC 5
20c64468 453
c9346151
SH		 454/* DASD path handling */
455
456#define DASD_PATH_OPERATIONAL 1
457#define DASD_PATH_TBV 2
458#define DASD_PATH_PP 3
459#define DASD_PATH_NPP 4
460#define DASD_PATH_MISCABLED 5
461#define DASD_PATH_NOHPF 6
462#define DASD_PATH_CUIR 7
a521b048 463#define DASD_PATH_IFCC 8
4d063e64 464#define DASD_PATH_FCSEC 9
c9346151 465
a521b048
SH		 466#define DASD_THRHLD_MAX 4294967295U
467#define DASD_INTERVAL_MAX 4294967295U
c9346151 468
19508b20
JH		 469/* FC Endpoint Security Capabilities */
470#define DASD_FC_SECURITY_UNSUP 0
471#define DASD_FC_SECURITY_AUTH 1
472#define DASD_FC_SECURITY_ENC_FCSP2 2
473#define DASD_FC_SECURITY_ENC_ERAS 3
474
475#define DASD_FC_SECURITY_ENC_STR "Encryption"
476static const struct {
477 u8 value;
478 char *name;
479} dasd_path_fcs_mnemonics[] = {
480 { DASD_FC_SECURITY_UNSUP, "Unsupported" },
481 { DASD_FC_SECURITY_AUTH, "Authentication" },
482 { DASD_FC_SECURITY_ENC_FCSP2, DASD_FC_SECURITY_ENC_STR },
483 { DASD_FC_SECURITY_ENC_ERAS, DASD_FC_SECURITY_ENC_STR },
484};
485
486static inline char *dasd_path_get_fcs_str(int val)
487{
488 int i;
489
490 for (i = 0; i < ARRAY_SIZE(dasd_path_fcs_mnemonics); i++) {
491 if (dasd_path_fcs_mnemonics[i].value == val)
492 return dasd_path_fcs_mnemonics[i].name;
493 }
494
495 return dasd_path_fcs_mnemonics[0].name;
496}
497
a4d26c6a 498struct dasd_path {
c9346151 499 unsigned long flags;
a521b048
SH		 500 u8 cssid;
501 u8 ssid;
502 u8 chpid;
c9346151 503 struct dasd_conf_data *conf_data;
a521b048 504 atomic_t error_count;
7bf76f01 505 unsigned long errorclk;
19508b20
JH		 506 u8 fc_security;
507 struct kobject kobj;
508 bool in_sysfs;
a4d26c6a
SW		 509};
510
19508b20
JH		 511#define to_dasd_path(path) container_of(path, struct dasd_path, kobj)
512
513static inline void dasd_path_release(struct kobject *kobj)
514{
515/* Memory for the dasd_path kobject is freed when dasd_free_device() is called */
516}
517
c9346151 518
4fa52aa7
SW		 519struct dasd_profile_info {
520 /* legacy part of profile data, as in dasd_profile_info_t */
521 unsigned int dasd_io_reqs; /* number of requests processed */
522 unsigned int dasd_io_sects; /* number of sectors processed */
523 unsigned int dasd_io_secs[32]; /* histogram of request's sizes */
524 unsigned int dasd_io_times[32]; /* histogram of requests's times */
525 unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */
526 unsigned int dasd_io_time1[32]; /* hist. of time from build to start */
527 unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */
528 unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */
529 unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */
530 unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */
531
532 /* new data */
bd7a9b37 533 struct timespec64 starttod; /* time of start or last reset */
4fa52aa7
SW		 534 unsigned int dasd_io_alias; /* requests using an alias */
535 unsigned int dasd_io_tpm; /* requests using transport mode */
536 unsigned int dasd_read_reqs; /* total number of read requests */
537 unsigned int dasd_read_sects; /* total number read sectors */
538 unsigned int dasd_read_alias; /* read request using an alias */
539 unsigned int dasd_read_tpm; /* read requests in transport mode */
540 unsigned int dasd_read_secs[32]; /* histogram of request's sizes */
541 unsigned int dasd_read_times[32]; /* histogram of requests's times */
542 unsigned int dasd_read_time1[32]; /* hist. time from build to start */
543 unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */
544 unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */
545 unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */
d2907225
SH		 546 unsigned long dasd_sum_times; /* sum of request times */
547 unsigned long dasd_sum_time_str; /* sum of time from build to start */
548 unsigned long dasd_sum_time_irq; /* sum of time from start to irq */
549 unsigned long dasd_sum_time_end; /* sum of time from irq to end */
4fa52aa7
SW		 550};
551
552struct dasd_profile {
553 struct dentry *dentry;
554 struct dasd_profile_info *data;
555 spinlock_t lock;
556};
557
5e6bdd37
SH		 558struct dasd_format_entry {
559 struct list_head list;
560 sector_t track;
561};
562
1da177e4
LT		 563struct dasd_device {
564 /* Block device stuff. */
8e09f215
SW		 565 struct dasd_block *block;
566
1da177e4 567 unsigned int devindex;
138c014d
HH		 568 unsigned long flags; /* per device flags */
569 unsigned short features; /* copy of devmap-features (read-only!) */
1da177e4 570
20c64468
SW		 571 /* extended error reporting stuff (eer) */
572 struct dasd_ccw_req *eer_cqr;
573
1da177e4
LT		 574 /* Device discipline stuff. */
575 struct dasd_discipline *discipline;
aa88861f 576 struct dasd_discipline *base_discipline;
543691a4 577 void *private;
c9346151
SH		 578 struct dasd_path path[8];
579 __u8 opm;
1da177e4
LT		 580
581 /* Device state and target state. */
582 int state, target;
9eb25122 583 struct mutex state_mutex;
1da177e4
LT		 584 int stopped; /* device (ccw_device_start) was stopped */
585
8e09f215 586 /* reference count. */
1da177e4 587 atomic_t ref_count;
1da177e4
LT		 588
589 /* ccw queue and memory for static ccw/erp buffers. */
590 struct list_head ccw_queue;
591 spinlock_t mem_lock;
592 void *ccw_mem;
593 void *erp_mem;
5e2b17e7 594 void *ese_mem;
1da177e4
LT		 595 struct list_head ccw_chunks;
596 struct list_head erp_chunks;
5e2b17e7 597 struct list_head ese_chunks;
1da177e4
LT		 598
599 atomic_t tasklet_scheduled;
600 struct tasklet_struct tasklet;
601 struct work_struct kick_work;
501183f2 602 struct work_struct reload_device;
f1633031 603 struct work_struct kick_validate;
59a9ed5f 604 struct work_struct suc_work;
a521b048 605 struct work_struct requeue_requests;
1da177e4
LT		 606 struct timer_list timer;
607
608 debug_info_t *debug_area;
609
610 struct ccw_device *cdev;
611
8e09f215
SW		 612 /* hook for alias management */
613 struct list_head alias_list;
7c8faa86
SH		 614
615 /* default expiration time in s */
616 unsigned long default_expires;
1f1ee9ad 617 unsigned long default_retries;
4fa52aa7 618
3d71ad32
HR		 619 unsigned long blk_timeout;
620
a521b048
SH		 621 unsigned long path_thrhld;
622 unsigned long path_interval;
623
4fa52aa7 624 struct dentry *debugfs_dentry;
5a3b7b11 625 struct dentry *hosts_dentry;
4fa52aa7 626 struct dasd_profile profile;
5e6bdd37 627 struct dasd_format_entry format_entry;
19508b20 628 struct kset *paths_info;
a91ff09d 629 struct dasd_copy_relation *copy;
8e09f215
SW		 630};
631
632struct dasd_block {
633 /* Block device stuff. */
634 struct gendisk *gdp;
8e09f215 635 spinlock_t request_queue_lock;
e443343e 636 struct blk_mq_tag_set tag_set;
8e09f215
SW		 637 struct block_device *bdev;
638 atomic_t open_count;
639
7bf76f01 640 unsigned long blocks; /* size of volume in blocks */
8e09f215
SW		 641 unsigned int bp_block; /* bytes per block */
642 unsigned int s2b_shift; /* log2 (bp_block/512) */
643
644 struct dasd_device *base;
645 struct list_head ccw_queue;
646 spinlock_t queue_lock;
647
648 atomic_t tasklet_scheduled;
649 struct tasklet_struct tasklet;
650 struct timer_list timer;
651
4fa52aa7
SW		 652 struct dentry *debugfs_dentry;
653 struct dasd_profile profile;
5e6bdd37
SH		 654
655 struct list_head format_list;
656 spinlock_t format_lock;
71f38716 657 atomic_t trkcount;
1da177e4
LT		 658};
659
5db8440c
SH		 660struct dasd_attention_data {
661 struct dasd_device *device;
662 __u8 lpum;
663};
8e09f215 664
e443343e
SH		 665struct dasd_queue {
666 spinlock_t lock;
667};
668
1da177e4
LT		 669/* reasons why device (ccw_device_start) was stopped */
670#define DASD_STOPPED_NOT_ACC 1 /* not accessible */
671#define DASD_STOPPED_QUIESCE 2 /* Quiesced */
672#define DASD_STOPPED_PENDING 4 /* long busy */
673#define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */
8e09f215 674#define DASD_STOPPED_SU 16 /* summary unit check handling */
413862ca 675#define DASD_STOPPED_PPRC 32 /* PPRC swap */
9e12e54c 676#define DASD_STOPPED_NOSPC 128 /* no space left */
1da177e4
LT		 677
678/* per device flags */
1da177e4 679#define DASD_FLAG_OFFLINE 3 /* device is in offline processing */
20c64468
SW		 680#define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */
681#define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */
33b62a30
SW		 682#define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't
683 * confuse this with the user specified
684 * read-only feature.
685 */
5a27e60d
SW		 686#define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */
687#define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */
c8d1c0ff 688#define DASD_FLAG_SUSPENDED 9 /* The device was suspended */
d07dc5d8
SH		 689#define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/
690#define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */
5ea34a01 691#define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */
1eb38023 692#define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */
59a9ed5f 693#define DASD_FLAG_SUC 14 /* unhandled summary unit check */
5a27e60d 694
5ea34a01
HR		 695#define DASD_SLEEPON_START_TAG ((void *) 1)
696#define DASD_SLEEPON_END_TAG ((void *) 2)
1da177e4
LT		 697
698void dasd_put_device_wake(struct dasd_device *);
699
413862ca
SH		 700/*
701 * return values to be returned from the copy pair swap function
702 * 0x00: swap successful
703 * 0x01: swap data invalid
704 * 0x02: no active device found
705 * 0x03: wrong primary specified
706 * 0x04: secondary device not found
707 * 0x05: swap already running
708 */
709#define DASD_COPYPAIRSWAP_SUCCESS 0
710#define DASD_COPYPAIRSWAP_INVALID 1
711#define DASD_COPYPAIRSWAP_NOACTIVE 2
712#define DASD_COPYPAIRSWAP_PRIMARY 3
713#define DASD_COPYPAIRSWAP_SECONDARY 4
714#define DASD_COPYPAIRSWAP_MULTIPLE 5
715
1da177e4
LT		 716/*
717 * Reference count inliners
718 */
719static inline void
720dasd_get_device(struct dasd_device *device)
721{
722 atomic_inc(&device->ref_count);
723}
724
725static inline void
726dasd_put_device(struct dasd_device *device)
727{
728 if (atomic_dec_return(&device->ref_count) == 0)
729 dasd_put_device_wake(device);
730}
731
732/*
733 * The static memory in ccw_mem and erp_mem is managed by a sorted
734 * list of free memory chunks.
735 */
736struct dasd_mchunk
737{
738 struct list_head list;
739 unsigned long size;
740} __attribute__ ((aligned(8)));
741
742static inline void
743dasd_init_chunklist(struct list_head *chunk_list, void *mem,
744 unsigned long size)
745{
746 struct dasd_mchunk *chunk;
747
748 INIT_LIST_HEAD(chunk_list);
749 chunk = (struct dasd_mchunk *) mem;
750 chunk->size = size - sizeof(struct dasd_mchunk);
751 list_add(&chunk->list, chunk_list);
752}
753
754static inline void *
755dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size)
756{
757 struct dasd_mchunk *chunk, *tmp;
758
759 size = (size + 7L) & -8L;
760 list_for_each_entry(chunk, chunk_list, list) {
761 if (chunk->size < size)
762 continue;
763 if (chunk->size > size + sizeof(struct dasd_mchunk)) {
764 char *endaddr = (char *) (chunk + 1) + chunk->size;
765 tmp = (struct dasd_mchunk *) (endaddr - size) - 1;
766 tmp->size = size;
767 chunk->size -= size + sizeof(struct dasd_mchunk);
768 chunk = tmp;
769 } else
770 list_del(&chunk->list);
771 return (void *) (chunk + 1);
772 }
773 return NULL;
774}
775
776static inline void
777dasd_free_chunk(struct list_head *chunk_list, void *mem)
778{
779 struct dasd_mchunk *chunk, *tmp;
780 struct list_head *p, *left;
781
782 chunk = (struct dasd_mchunk *)
783 ((char *) mem - sizeof(struct dasd_mchunk));
784 /* Find out the left neighbour in chunk_list. */
785 left = chunk_list;
786 list_for_each(p, chunk_list) {
787 if (list_entry(p, struct dasd_mchunk, list) > chunk)
788 break;
789 left = p;
790 }
791 /* Try to merge with right neighbour = next element from left. */
792 if (left->next != chunk_list) {
793 tmp = list_entry(left->next, struct dasd_mchunk, list);
794 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) {
795 list_del(&tmp->list);
796 chunk->size += tmp->size + sizeof(struct dasd_mchunk);
797 }
798 }
799 /* Try to merge with left neighbour. */
800 if (left != chunk_list) {
801 tmp = list_entry(left, struct dasd_mchunk, list);
802 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) {
803 tmp->size += chunk->size + sizeof(struct dasd_mchunk);
804 return;
805 }
806 }
807 __list_add(&chunk->list, left, left->next);
808}
809
810/*
811 * Check if bsize is in { 512, 1024, 2048, 4096 }
812 */
813static inline int
814dasd_check_blocksize(int bsize)
815{
e108cebb 816 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize))
1da177e4
LT		 817 return -EMEDIUMTYPE;
818 return 0;
819}
820
5b53a405
SH		 821/*
822 * return the callback data of the original request in case there are
823 * ERP requests build on top of it
824 */
825static inline void *dasd_get_callback_data(struct dasd_ccw_req *cqr)
826{
827 while (cqr->refers)
828 cqr = cqr->refers;
829
830 return cqr->callback_data;
831}
832
1da177e4 833/* externals in dasd.c */
4fa52aa7
SW		 834#define DASD_PROFILE_OFF 0
835#define DASD_PROFILE_ON 1
836#define DASD_PROFILE_GLOBAL_ONLY 2
1da177e4
LT		 837
838extern debug_info_t *dasd_debug_area;
8ea55c95 839extern struct dasd_profile dasd_global_profile;
4fa52aa7 840extern unsigned int dasd_global_profile_level;
83d5cde4 841extern const struct block_device_operations dasd_device_operations;
c68f4f4e 842extern struct blk_mq_ops dasd_mq_ops;
1da177e4 843
e18b890b 844extern struct kmem_cache *dasd_page_cache;
1da177e4 845
1da177e4 846struct dasd_ccw_req *
c5205f2f 847dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *);
5e2b17e7 848struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *);
1da177e4 849void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *);
5e2b17e7 850void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *);
5915a873 851void dasd_wakeup_cb(struct dasd_ccw_req *, void *);
1da177e4 852
1da177e4
LT		 853struct dasd_device *dasd_alloc_device(void);
854void dasd_free_device(struct dasd_device *);
855
8e09f215
SW		 856struct dasd_block *dasd_alloc_block(void);
857void dasd_free_block(struct dasd_block *);
858
9bdb4833 859enum blk_eh_timer_return dasd_times_out(struct request *req);
3d71ad32 860
1da177e4
LT		 861void dasd_enable_device(struct dasd_device *);
862void dasd_set_target_state(struct dasd_device *, int);
863void dasd_kick_device(struct dasd_device *);
501183f2 864void dasd_reload_device(struct dasd_device *);
a521b048 865void dasd_schedule_requeue(struct dasd_device *);
1da177e4
LT		 866
867void dasd_add_request_head(struct dasd_ccw_req *);
868void dasd_add_request_tail(struct dasd_ccw_req *);
869int dasd_start_IO(struct dasd_ccw_req *);
870int dasd_term_IO(struct dasd_ccw_req *);
8e09f215
SW		 871void dasd_schedule_device_bh(struct dasd_device *);
872void dasd_schedule_block_bh(struct dasd_block *);
1da177e4 873int dasd_sleep_on(struct dasd_ccw_req *);
d42e1712 874int dasd_sleep_on_queue(struct list_head *);
1da177e4 875int dasd_sleep_on_immediatly(struct dasd_ccw_req *);
bcf36768 876int dasd_sleep_on_queue_interruptible(struct list_head *);
1da177e4 877int dasd_sleep_on_interruptible(struct dasd_ccw_req *);
8e09f215
SW		 878void dasd_device_set_timer(struct dasd_device *, int);
879void dasd_device_clear_timer(struct dasd_device *);
880void dasd_block_set_timer(struct dasd_block *, int);
881void dasd_block_clear_timer(struct dasd_block *);
1da177e4 882int dasd_cancel_req(struct dasd_ccw_req *);
8e09f215 883int dasd_flush_device_queue(struct dasd_device *);
e03c5941 884int dasd_generic_probe(struct ccw_device *);
c020d722 885void dasd_generic_free_discipline(struct dasd_device *);
1da177e4
LT		 886void dasd_generic_remove (struct ccw_device *cdev);
887int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *);
888int dasd_generic_set_offline (struct ccw_device *cdev);
889int dasd_generic_notify(struct ccw_device *, int);
a4d26c6a
SW		 890int dasd_generic_last_path_gone(struct dasd_device *);
891int dasd_generic_path_operational(struct dasd_device *);
4679e893 892void dasd_generic_shutdown(struct ccw_device *);
a4d26c6a 893
8e09f215 894void dasd_generic_handle_state_change(struct dasd_device *);
a23ed009 895enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *);
a4d26c6a
SW		 896void dasd_generic_path_event(struct ccw_device *, int *);
897int dasd_generic_verify_path(struct dasd_device *, __u8);
9e12e54c
JH		 898void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *);
899void dasd_generic_space_avail(struct dasd_device *);
1da177e4 900
413862ca
SH		 901int dasd_generic_requeue_all_requests(struct dasd_device *);
902
68b781fe 903int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int);
f3eb5384 904char *dasd_get_sense(struct irb *);
17283b56 905
eb6e199b
SW		 906void dasd_device_set_stop_bits(struct dasd_device *, int);
907void dasd_device_remove_stop_bits(struct dasd_device *, int);
908
33b62a30
SW		 909int dasd_device_is_ro(struct dasd_device *);
910
4fa52aa7
SW		 911void dasd_profile_reset(struct dasd_profile *);
912int dasd_profile_on(struct dasd_profile *);
913void dasd_profile_off(struct dasd_profile *);
4fa52aa7 914char *dasd_get_user_string(const char __user *, size_t);
33b62a30 915
1da177e4
LT		 916/* externals in dasd_devmap.c */
917extern int dasd_max_devindex;
918extern int dasd_probeonly;
919extern int dasd_autodetect;
40545573 920extern int dasd_nopav;
f3eb5384 921extern int dasd_nofcx;
1da177e4
LT		 922
923int dasd_devmap_init(void);
924void dasd_devmap_exit(void);
925
926struct dasd_device *dasd_create_device(struct ccw_device *);
927void dasd_delete_device(struct dasd_device *);
928
f24acd45
HH		 929int dasd_get_feature(struct ccw_device *, int);
930int dasd_set_feature(struct ccw_device *, int, int);
931
1987c551 932extern const struct attribute_group *dasd_dev_groups[];
19508b20
JH		 933void dasd_path_create_kobj(struct dasd_device *, int);
934void dasd_path_create_kobjects(struct dasd_device *);
ac55ad2b 935void dasd_path_remove_kobjects(struct dasd_device *);
1da177e4
LT		 936
937struct dasd_device *dasd_device_from_cdev(struct ccw_device *);
a00bfd71 938struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *);
1da177e4
LT		 939struct dasd_device *dasd_device_from_devindex(int);
940
65f8da47
SW		 941void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *);
942struct dasd_device *dasd_device_from_gendisk(struct gendisk *);
943
3b1bea01 944int dasd_parse(void) __init;
69f90f6a 945int dasd_busid_known(const char *);
1da177e4
LT		 946
947/* externals in dasd_gendisk.c */
948int dasd_gendisk_init(void);
949void dasd_gendisk_exit(void);
8e09f215
SW		 950int dasd_gendisk_alloc(struct dasd_block *);
951void dasd_gendisk_free(struct dasd_block *);
952int dasd_scan_partitions(struct dasd_block *);
953void dasd_destroy_partitions(struct dasd_block *);
1da177e4
LT		 954
955/* externals in dasd_ioctl.c */
2c1b6ec1
CH		 956int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long);
957int dasd_set_read_only(struct block_device *bdev, bool ro);
1da177e4
LT		 958
959/* externals in dasd_proc.c */
960int dasd_proc_init(void);
961void dasd_proc_exit(void);
962
963/* externals in dasd_erp.c */
964struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *);
965struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *);
169bbdac 966struct dasd_ccw_req *dasd_alloc_erp_request(unsigned int, int, int,
1da177e4
LT		 967 struct dasd_device *);
968void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *);
969void dasd_log_sense(struct dasd_ccw_req *, struct irb *);
fc19f381 970void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb);
1da177e4 971
1da177e4 972/* externals in dasd_3990_erp.c */
1da177e4 973struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *);
f60c768c 974void dasd_3990_erp_handle_sim(struct dasd_device *, char *);
1da177e4 975
20c64468
SW		 976/* externals in dasd_eer.c */
977#ifdef CONFIG_DASD_EER
978int dasd_eer_init(void);
979void dasd_eer_exit(void);
980int dasd_eer_enable(struct dasd_device *);
981void dasd_eer_disable(struct dasd_device *);
982void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr,
983 unsigned int id);
984void dasd_eer_snss(struct dasd_device *);
985
986static inline int dasd_eer_enabled(struct dasd_device *device)
987{
988 return device->eer_cqr != NULL;
989}
990#else
991#define dasd_eer_init() (0)
992#define dasd_eer_exit() do { } while (0)
993#define dasd_eer_enable(d) (0)
994#define dasd_eer_disable(d) do { } while (0)
995#define dasd_eer_write(d,c,i) do { } while (0)
996#define dasd_eer_snss(d) do { } while (0)
997#define dasd_eer_enabled(d) (0)
998#endif /* CONFIG_DASD_ERR */
999
c9346151
SH		 1000
1001/* DASD path handling functions */
1002
1003/*
1004 * helper functions to modify bit masks for a given channel path for a device
1005 */
1006static inline int dasd_path_is_operational(struct dasd_device *device, int chp)
1007{
1008 return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
1009}
1010
1011static inline int dasd_path_need_verify(struct dasd_device *device, int chp)
1012{
1013 return test_bit(DASD_PATH_TBV, &device->path[chp].flags);
1014}
1015
1016static inline void dasd_path_verify(struct dasd_device *device, int chp)
1017{
1018 __set_bit(DASD_PATH_TBV, &device->path[chp].flags);
1019}
1020
1021static inline void dasd_path_clear_verify(struct dasd_device *device, int chp)
1022{
1023 __clear_bit(DASD_PATH_TBV, &device->path[chp].flags);
1024}
1025
1026static inline void dasd_path_clear_all_verify(struct dasd_device *device)
1027{
1028 int chp;
1029
1030 for (chp = 0; chp < 8; chp++)
1031 dasd_path_clear_verify(device, chp);
1032}
1033
4d063e64
JH		 1034static inline void dasd_path_fcsec(struct dasd_device *device, int chp)
1035{
1036 __set_bit(DASD_PATH_FCSEC, &device->path[chp].flags);
1037}
1038
1039static inline void dasd_path_clear_fcsec(struct dasd_device *device, int chp)
1040{
1041 __clear_bit(DASD_PATH_FCSEC, &device->path[chp].flags);
1042}
1043
1044static inline int dasd_path_need_fcsec(struct dasd_device *device, int chp)
1045{
1046 return test_bit(DASD_PATH_FCSEC, &device->path[chp].flags);
1047}
1048
1049static inline void dasd_path_clear_all_fcsec(struct dasd_device *device)
1050{
1051 int chp;
1052
1053 for (chp = 0; chp < 8; chp++)
1054 dasd_path_clear_fcsec(device, chp);
1055}
1056
c9346151
SH		 1057static inline void dasd_path_operational(struct dasd_device *device, int chp)
1058{
1059 __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
1060 device->opm |= (0x80 >> chp);
1061}
1062
1063static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp)
1064{
1065 __set_bit(DASD_PATH_NPP, &device->path[chp].flags);
1066}
1067
1068static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp)
1069{
1070 return test_bit(DASD_PATH_NPP, &device->path[chp].flags);
1071}
1072
1073static inline void dasd_path_clear_nonpreferred(struct dasd_device *device,
1074 int chp)
1075{
1076 __clear_bit(DASD_PATH_NPP, &device->path[chp].flags);
1077}
1078
1079static inline void dasd_path_preferred(struct dasd_device *device, int chp)
1080{
1081 __set_bit(DASD_PATH_PP, &device->path[chp].flags);
1082}
1083
1084static inline int dasd_path_is_preferred(struct dasd_device *device, int chp)
1085{
1086 return test_bit(DASD_PATH_PP, &device->path[chp].flags);
1087}
1088
1089static inline void dasd_path_clear_preferred(struct dasd_device *device,
1090 int chp)
1091{
1092 __clear_bit(DASD_PATH_PP, &device->path[chp].flags);
1093}
1094
1095static inline void dasd_path_clear_oper(struct dasd_device *device, int chp)
1096{
1097 __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
1098 device->opm &= ~(0x80 >> chp);
1099}
1100
1101static inline void dasd_path_clear_cable(struct dasd_device *device, int chp)
1102{
1103 __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
1104}
1105
1106static inline void dasd_path_cuir(struct dasd_device *device, int chp)
1107{
1108 __set_bit(DASD_PATH_CUIR, &device->path[chp].flags);
1109}
1110
1111static inline int dasd_path_is_cuir(struct dasd_device *device, int chp)
1112{
1113 return test_bit(DASD_PATH_CUIR, &device->path[chp].flags);
1114}
1115
1116static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp)
1117{
1118 __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags);
1119}
1120
a521b048
SH		 1121static inline void dasd_path_ifcc(struct dasd_device *device, int chp)
1122{
1123 set_bit(DASD_PATH_IFCC, &device->path[chp].flags);
1124}
1125
1126static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp)
1127{
1128 return test_bit(DASD_PATH_IFCC, &device->path[chp].flags);
1129}
1130
1131static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp)
1132{
1133 clear_bit(DASD_PATH_IFCC, &device->path[chp].flags);
1134}
1135
c9346151
SH		 1136static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp)
1137{
1138 __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
1139}
1140
1141static inline void dasd_path_miscabled(struct dasd_device *device, int chp)
1142{
1143 __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
1144}
1145
1146static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp)
1147{
1148 return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
1149}
1150
1151static inline void dasd_path_nohpf(struct dasd_device *device, int chp)
1152{
1153 __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
1154}
1155
1156static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp)
1157{
1158 return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
1159}
1160
1161/*
1162 * get functions for path masks
1163 * will return a path masks for the given device
1164 */
1165
1166static inline __u8 dasd_path_get_opm(struct dasd_device *device)
1167{
1168 return device->opm;
1169}
1170
1171static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device)
1172{
1173 int chp;
1174 __u8 tbvpm = 0x00;
1175
1176 for (chp = 0; chp < 8; chp++)
1177 if (dasd_path_need_verify(device, chp))
1178 tbvpm |= 0x80 >> chp;
1179 return tbvpm;
1180}
1181
4d063e64
JH		 1182static inline int dasd_path_get_fcsecpm(struct dasd_device *device)
1183{
1184 int chp;
1185
1186 for (chp = 0; chp < 8; chp++)
1187 if (dasd_path_need_fcsec(device, chp))
1188 return 1;
1189
1190 return 0;
1191}
1192
c9346151
SH		 1193static inline __u8 dasd_path_get_nppm(struct dasd_device *device)
1194{
1195 int chp;
1196 __u8 npm = 0x00;
1197
1198 for (chp = 0; chp < 8; chp++) {
1199 if (dasd_path_is_nonpreferred(device, chp))
1200 npm |= 0x80 >> chp;
1201 }
1202 return npm;
1203}
1204
1205static inline __u8 dasd_path_get_ppm(struct dasd_device *device)
1206{
1207 int chp;
1208 __u8 ppm = 0x00;
1209
1210 for (chp = 0; chp < 8; chp++)
1211 if (dasd_path_is_preferred(device, chp))
1212 ppm |= 0x80 >> chp;
1213 return ppm;
1214}
1215
1216static inline __u8 dasd_path_get_cablepm(struct dasd_device *device)
1217{
1218 int chp;
1219 __u8 cablepm = 0x00;
1220
1221 for (chp = 0; chp < 8; chp++)
1222 if (dasd_path_is_miscabled(device, chp))
1223 cablepm |= 0x80 >> chp;
1224 return cablepm;
1225}
1226
1227static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device)
1228{
1229 int chp;
1230 __u8 cuirpm = 0x00;
1231
1232 for (chp = 0; chp < 8; chp++)
1233 if (dasd_path_is_cuir(device, chp))
1234 cuirpm |= 0x80 >> chp;
1235 return cuirpm;
1236}
1237
a521b048
SH		 1238static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device)
1239{
1240 int chp;
1241 __u8 ifccpm = 0x00;
1242
1243 for (chp = 0; chp < 8; chp++)
1244 if (dasd_path_is_ifcc(device, chp))
1245 ifccpm |= 0x80 >> chp;
1246 return ifccpm;
1247}
1248
c9346151
SH		 1249static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device)
1250{
1251 int chp;
1252 __u8 hpfpm = 0x00;
1253
1254 for (chp = 0; chp < 8; chp++)
1255 if (dasd_path_is_nohpf(device, chp))
1256 hpfpm |= 0x80 >> chp;
1257 return hpfpm;
1258}
1259
19508b20
JH		 1260static inline u8 dasd_path_get_fcs_path(struct dasd_device *device, int chp)
1261{
1262 return device->path[chp].fc_security;
1263}
1264
1265static inline int dasd_path_get_fcs_device(struct dasd_device *device)
1266{
1267 u8 fc_sec = 0;
1268 int chp;
1269
1270 for (chp = 0; chp < 8; chp++) {
1271 if (device->opm & (0x80 >> chp)) {
1272 fc_sec = device->path[chp].fc_security;
1273 break;
1274 }
1275 }
1276 for (; chp < 8; chp++) {
1277 if (device->opm & (0x80 >> chp))
1278 if (device->path[chp].fc_security != fc_sec)
1279 return -EINVAL;
1280 }
1281
1282 return fc_sec;
1283}
1284
c9346151
SH		 1285/*
1286 * add functions for path masks
1287 * the existing path mask will be extended by the given path mask
1288 */
1289static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm)
1290{
1291 int chp;
1292
1293 for (chp = 0; chp < 8; chp++)
1294 if (pm & (0x80 >> chp))
1295 dasd_path_verify(device, chp);
1296}
1297
a521b048
SH		 1298static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device)
1299{
1300 int chp;
1301 __u8 nopm = 0x00;
1302
1303 for (chp = 0; chp < 8; chp++)
1304 if (dasd_path_is_nohpf(device, chp) ||
1305 dasd_path_is_ifcc(device, chp) ||
1306 dasd_path_is_cuir(device, chp) ||
1307 dasd_path_is_miscabled(device, chp))
1308 nopm |= 0x80 >> chp;
1309 return nopm;
1310}
1311
c9346151
SH		 1312static inline void dasd_path_add_opm(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_operational(device, chp);
1319 /*
1320 * if the path is used
1321 * it should not be in one of the negative lists
1322 */
1323 dasd_path_clear_nohpf(device, chp);
1324 dasd_path_clear_cuir(device, chp);
1325 dasd_path_clear_cable(device, chp);
a521b048 1326 dasd_path_clear_ifcc(device, chp);
c9346151
SH		 1327 }
1328}
1329
1330static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm)
1331{
1332 int chp;
1333
1334 for (chp = 0; chp < 8; chp++)
1335 if (pm & (0x80 >> chp))
1336 dasd_path_miscabled(device, chp);
1337}
1338
1339static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm)
1340{
1341 int chp;
1342
1343 for (chp = 0; chp < 8; chp++)
1344 if (pm & (0x80 >> chp))
1345 dasd_path_cuir(device, chp);
1346}
1347
a521b048
SH		 1348static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm)
1349{
1350 int chp;
1351
1352 for (chp = 0; chp < 8; chp++)
1353 if (pm & (0x80 >> chp))
1354 dasd_path_ifcc(device, chp);
1355}
1356
c9346151
SH		 1357static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm)
1358{
1359 int chp;
1360
1361 for (chp = 0; chp < 8; chp++)
1362 if (pm & (0x80 >> chp))
1363 dasd_path_nonpreferred(device, chp);
1364}
1365
1366static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm)
1367{
1368 int chp;
1369
1370 for (chp = 0; chp < 8; chp++)
1371 if (pm & (0x80 >> chp))
1372 dasd_path_nohpf(device, chp);
1373}
1374
1375static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm)
1376{
1377 int chp;
1378
1379 for (chp = 0; chp < 8; chp++)
1380 if (pm & (0x80 >> chp))
1381 dasd_path_preferred(device, chp);
1382}
1383
a8e5d491
SH		 1384static inline void dasd_path_add_fcsecpm(struct dasd_device *device, __u8 pm)
1385{
1386 int chp;
1387
1388 for (chp = 0; chp < 8; chp++)
1389 if (pm & (0x80 >> chp))
1390 dasd_path_fcsec(device, chp);
1391}
1392
c9346151
SH		 1393/*
1394 * set functions for path masks
1395 * the existing path mask will be replaced by the given path mask
1396 */
1397static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm)
1398{
1399 int chp;
1400
1401 for (chp = 0; chp < 8; chp++)
1402 if (pm & (0x80 >> chp))
1403 dasd_path_verify(device, chp);
1404 else
1405 dasd_path_clear_verify(device, chp);
1406}
1407
1408static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm)
1409{
1410 int chp;
1411
1412 for (chp = 0; chp < 8; chp++) {
1413 dasd_path_clear_oper(device, chp);
1414 if (pm & (0x80 >> chp)) {
1415 dasd_path_operational(device, chp);
1416 /*
1417 * if the path is used
1418 * it should not be in one of the negative lists
1419 */
1420 dasd_path_clear_nohpf(device, chp);
1421 dasd_path_clear_cuir(device, chp);
1422 dasd_path_clear_cable(device, chp);
a521b048 1423 dasd_path_clear_ifcc(device, chp);
c9346151
SH		 1424 }
1425 }
1426}
1427
1428/*
1429 * remove functions for path masks
1430 * the existing path mask will be cleared with the given path mask
1431 */
1432static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm)
1433{
1434 int chp;
1435
1436 for (chp = 0; chp < 8; chp++) {
1437 if (pm & (0x80 >> chp))
1438 dasd_path_clear_oper(device, chp);
1439 }
1440}
1441
1442/*
1443 * add the newly available path to the to be verified pm and remove it from
1444 * normal operation until it is verified
1445 */
1446static inline void dasd_path_available(struct dasd_device *device, int chp)
1447{
1448 dasd_path_clear_oper(device, chp);
1449 dasd_path_verify(device, chp);
1450}
1451
1452static inline void dasd_path_notoper(struct dasd_device *device, int chp)
1453{
1454 dasd_path_clear_oper(device, chp);
1455 dasd_path_clear_preferred(device, chp);
1456 dasd_path_clear_nonpreferred(device, chp);
1457}
1458
4d063e64
JH		 1459static inline void dasd_path_fcsec_update(struct dasd_device *device, int chp)
1460{
1461 dasd_path_fcsec(device, chp);
1462}
1463
c9346151
SH		 1464/*
1465 * remove all paths from normal operation
1466 */
1467static inline void dasd_path_no_path(struct dasd_device *device)
1468{
1469 int chp;
1470
1471 for (chp = 0; chp < 8; chp++)
1472 dasd_path_notoper(device, chp);
1473
1474 dasd_path_clear_all_verify(device);
1475}
1476
1477/* end - path handling */
1478
1da177e4 1479#endif /* DASD_H */
Linux 6.x block layer and io_uring tree(s)