1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 4 * Horst Hummel <Horst.Hummel@de.ibm.com> 5 * Martin Schwidefsky <schwidefsky@de.ibm.com> 6 * Bugreports.to..: <Linux390@de.ibm.com> 7 * Copyright IBM Corp. 1999, 2009 8 */ 9 10#ifndef DASD_INT_H 11#define DASD_INT_H 12 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. 22 * unfmt: the device could not be analyzed (format is unknown). 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 43#define DASD_STATE_UNFMT 3 44#define DASD_STATE_READY 4 45#define DASD_STATE_ONLINE 5 46 47#include <linux/module.h> 48#include <linux/wait.h> 49#include <linux/blkdev.h> 50#include <linux/genhd.h> 51#include <linux/hdreg.h> 52#include <linux/interrupt.h> 53#include <linux/log2.h> 54#include <asm/ccwdev.h> 55#include <linux/workqueue.h> 56#include <asm/debug.h> 57#include <asm/dasd.h> 58#include <asm/idals.h> 59#include <linux/bitops.h> 60#include <linux/blk-mq.h> 61 62/* DASD discipline magic */ 63#define DASD_ECKD_MAGIC 0xC5C3D2C4 64#define DASD_DIAG_MAGIC 0xC4C9C1C7 65#define DASD_FBA_MAGIC 0xC6C2C140 66 67/* 68 * SECTION: Type definitions 69 */ 70struct dasd_device; 71struct dasd_block; 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 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 84/* lock class for nested cdev lock */ 85#define CDEV_NESTED_FIRST 1 86#define CDEV_NESTED_SECOND 2 87 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 99#define DBF_EVENT(d_level, d_str, d_data...)\ 100do { \ 101 debug_sprintf_event(dasd_debug_area, \ 102 d_level,\ 103 d_str "\n", \ 104 d_data); \ 105} while(0) 106 107#define DBF_EVENT_DEVID(d_level, d_cdev, d_str, d_data...) \ 108do { \ 109 struct ccw_dev_id __dev_id; \ 110 ccw_device_get_id(d_cdev, &__dev_id); \ 111 debug_sprintf_event(dasd_debug_area, \ 112 d_level, \ 113 "0.%x.%04x " d_str "\n", \ 114 __dev_id.ssid, __dev_id.devno, d_data); \ 115} while (0) 116 117/* limit size for an errorstring */ 118#define ERRORLENGTH 30 119 120/* 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", \ 134 dev_name(&d_device->cdev->dev), d_args); \ 135 DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \ 136} while(0) 137 138#define MESSAGE(d_loglevel,d_string,d_args...)\ 139do { \ 140 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ 141 DBF_EVENT(DBF_ALERT, d_string, d_args); \ 142} while(0) 143 144/* 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", \ 148 dev_name(&d_device->cdev->dev), d_args); \ 149} while(0) 150 151#define MESSAGE_LOG(d_loglevel,d_string,d_args...)\ 152do { \ 153 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ 154} while(0) 155 156/* Macro to calculate number of blocks per page */ 157#define BLOCKS_PER_PAGE(blksize) (PAGE_SIZE / blksize) 158 159struct dasd_ccw_req { 160 unsigned int magic; /* Eye catcher */ 161 int intrc; /* internal error, e.g. from start_IO */ 162 struct list_head devlist; /* for dasd_device request queue */ 163 struct list_head blocklist; /* for dasd_block request queue */ 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 */ 167 struct dasd_device *basedev; /* base device if no block->base */ 168 void *cpaddr; /* address of ccw or tcw */ 169 short retries; /* A retry counter */ 170 unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */ 171 char status; /* status of this request */ 172 char lpm; /* logical path mask */ 173 unsigned long flags; /* flags of this request */ 174 struct dasd_queue *dq; 175 unsigned long starttime; /* jiffies time of request start */ 176 unsigned long expires; /* expiration period in jiffies */ 177 void *data; /* pointer to data area */ 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 */ 181 void *mem_chunk; 182 183 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 */ 187 188 void (*callback)(struct dasd_ccw_req *, void *data); 189 void *callback_data; 190 unsigned int proc_bytes; /* bytes for partial completion */ 191 unsigned int trkcount; /* count formatted tracks */ 192}; 193 194/* 195 * dasd_ccw_req -> status can be: 196 */ 197#define DASD_CQR_FILLED 0x00 /* request is ready to be processed */ 198#define DASD_CQR_DONE 0x01 /* request is completed successfully */ 199#define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */ 200#define DASD_CQR_IN_ERP 0x03 /* request is in recovery */ 201#define DASD_CQR_FAILED 0x04 /* request is finally failed */ 202#define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */ 203 204#define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */ 205#define DASD_CQR_IN_IO 0x81 /* request is currently in IO */ 206#define DASD_CQR_ERROR 0x82 /* request is completed with error */ 207#define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */ 208#define DASD_CQR_CLEARED 0x84 /* request was cleared */ 209#define DASD_CQR_SUCCESS 0x85 /* request was successful */ 210 211/* default expiration time*/ 212#define DASD_EXPIRES 300 213#define DASD_EXPIRES_MAX 40000000 214#define DASD_RETRIES 256 215#define DASD_RETRIES_MAX 32768 216 217/* per dasd_ccw_req flags */ 218#define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */ 219#define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */ 220#define DASD_CQR_VERIFY_PATH 2 /* path verification request */ 221#define DASD_CQR_ALLOW_SLOCK 3 /* Try this request even when lock was 222 * stolen. Should not be combined with 223 * DASD_CQR_FLAGS_USE_ERP 224 */ 225/* 226 * The following flags are used to suppress output of certain errors. 227 */ 228#define DASD_CQR_SUPPRESS_NRF 4 /* Suppress 'No Record Found' error */ 229#define DASD_CQR_SUPPRESS_FP 5 /* Suppress 'File Protected' error*/ 230#define DASD_CQR_SUPPRESS_IL 6 /* Suppress 'Incorrect Length' error */ 231#define DASD_CQR_SUPPRESS_CR 7 /* Suppress 'Command Reject' error */ 232 233#define DASD_REQ_PER_DEV 4 234 235/* Signature for error recovery functions. */ 236typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *); 237 238/* 239 * A single CQR can only contain a maximum of 255 CCWs. It is limited by 240 * the locate record and locate record extended count value which can only hold 241 * 1 Byte max. 242 */ 243#define DASD_CQR_MAX_CCW 255 244 245/* 246 * Unique identifier for dasd device. 247 */ 248#define UA_NOT_CONFIGURED 0x00 249#define UA_BASE_DEVICE 0x01 250#define UA_BASE_PAV_ALIAS 0x02 251#define UA_HYPER_PAV_ALIAS 0x03 252 253struct dasd_uid { 254 __u8 type; 255 char vendor[4]; 256 char serial[15]; 257 __u16 ssid; 258 __u8 real_unit_addr; 259 __u8 base_unit_addr; 260 char vduit[33]; 261}; 262 263/* 264 * the struct dasd_discipline is 265 * sth like a table of virtual functions, if you think of dasd_eckd 266 * inheriting dasd... 267 * no, currently we are not planning to reimplement the driver in C++ 268 */ 269struct dasd_discipline { 270 struct module *owner; 271 char ebcname[8]; /* a name used for tagging and printks */ 272 char name[8]; /* a name used for tagging and printks */ 273 274 struct list_head list; /* used for list of disciplines */ 275 276 /* 277 * Device recognition functions. check_device is used to verify 278 * the sense data and the information returned by read device 279 * characteristics. It returns 0 if the discipline can be used 280 * for the device in question. uncheck_device is called during 281 * device shutdown to deregister a device from its discipline. 282 */ 283 int (*check_device) (struct dasd_device *); 284 void (*uncheck_device) (struct dasd_device *); 285 286 /* 287 * do_analysis is used in the step from device state "basic" to 288 * state "accept". It returns 0 if the device can be made ready, 289 * it returns -EMEDIUMTYPE if the device can't be made ready or 290 * -EAGAIN if do_analysis started a ccw that needs to complete 291 * before the analysis may be repeated. 292 */ 293 int (*do_analysis) (struct dasd_block *); 294 295 /* 296 * This function is called, when new paths become available. 297 * Disciplins may use this callback to do necessary setup work, 298 * e.g. verify that new path is compatible with the current 299 * configuration. 300 */ 301 int (*pe_handler)(struct dasd_device *, __u8); 302 303 /* 304 * Last things to do when a device is set online, and first things 305 * when it is set offline. 306 */ 307 int (*basic_to_ready) (struct dasd_device *); 308 int (*online_to_ready) (struct dasd_device *); 309 int (*basic_to_known)(struct dasd_device *); 310 311 /* 312 * Initialize block layer request queue. 313 */ 314 void (*setup_blk_queue)(struct dasd_block *); 315 /* (struct dasd_device *); 316 * Device operation functions. build_cp creates a ccw chain for 317 * a block device request, start_io starts the request and 318 * term_IO cancels it (e.g. in case of a timeout). format_device 319 * formats the device and check_device_format compares the format of 320 * a device with the expected format_data. 321 * handle_terminated_request allows to examine a cqr and prepare 322 * it for retry. 323 */ 324 struct dasd_ccw_req *(*build_cp) (struct dasd_device *, 325 struct dasd_block *, 326 struct request *); 327 int (*start_IO) (struct dasd_ccw_req *); 328 int (*term_IO) (struct dasd_ccw_req *); 329 void (*handle_terminated_request) (struct dasd_ccw_req *); 330 int (*format_device) (struct dasd_device *, 331 struct format_data_t *, int); 332 int (*check_device_format)(struct dasd_device *, 333 struct format_check_t *, int); 334 int (*free_cp) (struct dasd_ccw_req *, struct request *); 335 336 /* 337 * Error recovery functions. examine_error() returns a value that 338 * indicates what to do for an error condition. If examine_error() 339 * returns 'dasd_era_recover' erp_action() is called to create a 340 * special error recovery ccw. erp_postaction() is called after 341 * an error recovery ccw has finished its execution. dump_sense 342 * is called for every error condition to print the sense data 343 * to the console. 344 */ 345 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); 346 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); 347 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, 348 struct irb *); 349 void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *); 350 void (*check_for_device_change) (struct dasd_device *, 351 struct dasd_ccw_req *, 352 struct irb *); 353 354 /* i/o control functions. */ 355 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *); 356 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); 357 int (*ioctl) (struct dasd_block *, unsigned int, void __user *); 358 359 /* suspend/resume functions */ 360 int (*freeze) (struct dasd_device *); 361 int (*restore) (struct dasd_device *); 362 363 /* reload device after state change */ 364 int (*reload) (struct dasd_device *); 365 366 int (*get_uid) (struct dasd_device *, struct dasd_uid *); 367 void (*kick_validate) (struct dasd_device *); 368 int (*check_attention)(struct dasd_device *, __u8); 369 int (*host_access_count)(struct dasd_device *); 370 int (*hosts_print)(struct dasd_device *, struct seq_file *); 371 void (*handle_hpf_error)(struct dasd_device *, struct irb *); 372 void (*disable_hpf)(struct dasd_device *); 373 int (*hpf_enabled)(struct dasd_device *); 374 void (*reset_path)(struct dasd_device *, __u8); 375 376 /* 377 * Extent Space Efficient (ESE) relevant functions 378 */ 379 int (*is_ese)(struct dasd_device *); 380 /* Capacity */ 381 int (*space_allocated)(struct dasd_device *); 382 int (*space_configured)(struct dasd_device *); 383 int (*logical_capacity)(struct dasd_device *); 384 int (*release_space)(struct dasd_device *, struct format_data_t *); 385 /* Extent Pool */ 386 int (*ext_pool_id)(struct dasd_device *); 387 int (*ext_size)(struct dasd_device *); 388 int (*ext_pool_cap_at_warnlevel)(struct dasd_device *); 389 int (*ext_pool_warn_thrshld)(struct dasd_device *); 390 int (*ext_pool_oos)(struct dasd_device *); 391 int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *); 392 struct dasd_ccw_req *(*ese_format)(struct dasd_device *, 393 struct dasd_ccw_req *, struct irb *); 394 int (*ese_read)(struct dasd_ccw_req *, struct irb *); 395}; 396 397extern struct dasd_discipline *dasd_diag_discipline_pointer; 398 399/* 400 * Notification numbers for extended error reporting notifications: 401 * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's 402 * eer pointer) is freed. The error reporting module needs to do all necessary 403 * cleanup steps. 404 * The DASD_EER_TRIGGER notification sends the actual error reports (triggers). 405 */ 406#define DASD_EER_DISABLE 0 407#define DASD_EER_TRIGGER 1 408 409/* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */ 410#define DASD_EER_FATALERROR 1 411#define DASD_EER_NOPATH 2 412#define DASD_EER_STATECHANGE 3 413#define DASD_EER_PPRCSUSPEND 4 414#define DASD_EER_NOSPC 5 415 416/* DASD path handling */ 417 418#define DASD_PATH_OPERATIONAL 1 419#define DASD_PATH_TBV 2 420#define DASD_PATH_PP 3 421#define DASD_PATH_NPP 4 422#define DASD_PATH_MISCABLED 5 423#define DASD_PATH_NOHPF 6 424#define DASD_PATH_CUIR 7 425#define DASD_PATH_IFCC 8 426 427#define DASD_THRHLD_MAX 4294967295U 428#define DASD_INTERVAL_MAX 4294967295U 429 430struct dasd_path { 431 unsigned long flags; 432 u8 cssid; 433 u8 ssid; 434 u8 chpid; 435 struct dasd_conf_data *conf_data; 436 atomic_t error_count; 437 unsigned long errorclk; 438}; 439 440 441struct dasd_profile_info { 442 /* legacy part of profile data, as in dasd_profile_info_t */ 443 unsigned int dasd_io_reqs; /* number of requests processed */ 444 unsigned int dasd_io_sects; /* number of sectors processed */ 445 unsigned int dasd_io_secs[32]; /* histogram of request's sizes */ 446 unsigned int dasd_io_times[32]; /* histogram of requests's times */ 447 unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */ 448 unsigned int dasd_io_time1[32]; /* hist. of time from build to start */ 449 unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */ 450 unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */ 451 unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */ 452 unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */ 453 454 /* new data */ 455 struct timespec64 starttod; /* time of start or last reset */ 456 unsigned int dasd_io_alias; /* requests using an alias */ 457 unsigned int dasd_io_tpm; /* requests using transport mode */ 458 unsigned int dasd_read_reqs; /* total number of read requests */ 459 unsigned int dasd_read_sects; /* total number read sectors */ 460 unsigned int dasd_read_alias; /* read request using an alias */ 461 unsigned int dasd_read_tpm; /* read requests in transport mode */ 462 unsigned int dasd_read_secs[32]; /* histogram of request's sizes */ 463 unsigned int dasd_read_times[32]; /* histogram of requests's times */ 464 unsigned int dasd_read_time1[32]; /* hist. time from build to start */ 465 unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */ 466 unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */ 467 unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */ 468 unsigned long dasd_sum_times; /* sum of request times */ 469 unsigned long dasd_sum_time_str; /* sum of time from build to start */ 470 unsigned long dasd_sum_time_irq; /* sum of time from start to irq */ 471 unsigned long dasd_sum_time_end; /* sum of time from irq to end */ 472}; 473 474struct dasd_profile { 475 struct dentry *dentry; 476 struct dasd_profile_info *data; 477 spinlock_t lock; 478}; 479 480struct dasd_format_entry { 481 struct list_head list; 482 sector_t track; 483}; 484 485struct dasd_device { 486 /* Block device stuff. */ 487 struct dasd_block *block; 488 489 unsigned int devindex; 490 unsigned long flags; /* per device flags */ 491 unsigned short features; /* copy of devmap-features (read-only!) */ 492 493 /* extended error reporting stuff (eer) */ 494 struct dasd_ccw_req *eer_cqr; 495 496 /* Device discipline stuff. */ 497 struct dasd_discipline *discipline; 498 struct dasd_discipline *base_discipline; 499 void *private; 500 struct dasd_path path[8]; 501 __u8 opm; 502 503 /* Device state and target state. */ 504 int state, target; 505 struct mutex state_mutex; 506 int stopped; /* device (ccw_device_start) was stopped */ 507 508 /* reference count. */ 509 atomic_t ref_count; 510 511 /* ccw queue and memory for static ccw/erp buffers. */ 512 struct list_head ccw_queue; 513 spinlock_t mem_lock; 514 void *ccw_mem; 515 void *erp_mem; 516 void *ese_mem; 517 struct list_head ccw_chunks; 518 struct list_head erp_chunks; 519 struct list_head ese_chunks; 520 521 atomic_t tasklet_scheduled; 522 struct tasklet_struct tasklet; 523 struct work_struct kick_work; 524 struct work_struct restore_device; 525 struct work_struct reload_device; 526 struct work_struct kick_validate; 527 struct work_struct suc_work; 528 struct work_struct requeue_requests; 529 struct timer_list timer; 530 531 debug_info_t *debug_area; 532 533 struct ccw_device *cdev; 534 535 /* hook for alias management */ 536 struct list_head alias_list; 537 538 /* default expiration time in s */ 539 unsigned long default_expires; 540 unsigned long default_retries; 541 542 unsigned long blk_timeout; 543 544 unsigned long path_thrhld; 545 unsigned long path_interval; 546 547 struct dentry *debugfs_dentry; 548 struct dentry *hosts_dentry; 549 struct dasd_profile profile; 550 struct dasd_format_entry format_entry; 551}; 552 553struct dasd_block { 554 /* Block device stuff. */ 555 struct gendisk *gdp; 556 struct request_queue *request_queue; 557 spinlock_t request_queue_lock; 558 struct blk_mq_tag_set tag_set; 559 struct block_device *bdev; 560 atomic_t open_count; 561 562 unsigned long blocks; /* size of volume in blocks */ 563 unsigned int bp_block; /* bytes per block */ 564 unsigned int s2b_shift; /* log2 (bp_block/512) */ 565 566 struct dasd_device *base; 567 struct list_head ccw_queue; 568 spinlock_t queue_lock; 569 570 atomic_t tasklet_scheduled; 571 struct tasklet_struct tasklet; 572 struct timer_list timer; 573 574 struct dentry *debugfs_dentry; 575 struct dasd_profile profile; 576 577 struct list_head format_list; 578 spinlock_t format_lock; 579 atomic_t trkcount; 580}; 581 582struct dasd_attention_data { 583 struct dasd_device *device; 584 __u8 lpum; 585}; 586 587struct dasd_queue { 588 spinlock_t lock; 589}; 590 591/* reasons why device (ccw_device_start) was stopped */ 592#define DASD_STOPPED_NOT_ACC 1 /* not accessible */ 593#define DASD_STOPPED_QUIESCE 2 /* Quiesced */ 594#define DASD_STOPPED_PENDING 4 /* long busy */ 595#define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ 596#define DASD_STOPPED_SU 16 /* summary unit check handling */ 597#define DASD_STOPPED_PM 32 /* pm state transition */ 598#define DASD_UNRESUMED_PM 64 /* pm resume failed state */ 599#define DASD_STOPPED_NOSPC 128 /* no space left */ 600 601/* per device flags */ 602#define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ 603#define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ 604#define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ 605#define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't 606 * confuse this with the user specified 607 * read-only feature. 608 */ 609#define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */ 610#define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */ 611#define DASD_FLAG_SUSPENDED 9 /* The device was suspended */ 612#define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/ 613#define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */ 614#define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */ 615#define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */ 616#define DASD_FLAG_SUC 14 /* unhandled summary unit check */ 617 618#define DASD_SLEEPON_START_TAG ((void *) 1) 619#define DASD_SLEEPON_END_TAG ((void *) 2) 620 621void dasd_put_device_wake(struct dasd_device *); 622 623/* 624 * Reference count inliners 625 */ 626static inline void 627dasd_get_device(struct dasd_device *device) 628{ 629 atomic_inc(&device->ref_count); 630} 631 632static inline void 633dasd_put_device(struct dasd_device *device) 634{ 635 if (atomic_dec_return(&device->ref_count) == 0) 636 dasd_put_device_wake(device); 637} 638 639/* 640 * The static memory in ccw_mem and erp_mem is managed by a sorted 641 * list of free memory chunks. 642 */ 643struct dasd_mchunk 644{ 645 struct list_head list; 646 unsigned long size; 647} __attribute__ ((aligned(8))); 648 649static inline void 650dasd_init_chunklist(struct list_head *chunk_list, void *mem, 651 unsigned long size) 652{ 653 struct dasd_mchunk *chunk; 654 655 INIT_LIST_HEAD(chunk_list); 656 chunk = (struct dasd_mchunk *) mem; 657 chunk->size = size - sizeof(struct dasd_mchunk); 658 list_add(&chunk->list, chunk_list); 659} 660 661static inline void * 662dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size) 663{ 664 struct dasd_mchunk *chunk, *tmp; 665 666 size = (size + 7L) & -8L; 667 list_for_each_entry(chunk, chunk_list, list) { 668 if (chunk->size < size) 669 continue; 670 if (chunk->size > size + sizeof(struct dasd_mchunk)) { 671 char *endaddr = (char *) (chunk + 1) + chunk->size; 672 tmp = (struct dasd_mchunk *) (endaddr - size) - 1; 673 tmp->size = size; 674 chunk->size -= size + sizeof(struct dasd_mchunk); 675 chunk = tmp; 676 } else 677 list_del(&chunk->list); 678 return (void *) (chunk + 1); 679 } 680 return NULL; 681} 682 683static inline void 684dasd_free_chunk(struct list_head *chunk_list, void *mem) 685{ 686 struct dasd_mchunk *chunk, *tmp; 687 struct list_head *p, *left; 688 689 chunk = (struct dasd_mchunk *) 690 ((char *) mem - sizeof(struct dasd_mchunk)); 691 /* Find out the left neighbour in chunk_list. */ 692 left = chunk_list; 693 list_for_each(p, chunk_list) { 694 if (list_entry(p, struct dasd_mchunk, list) > chunk) 695 break; 696 left = p; 697 } 698 /* Try to merge with right neighbour = next element from left. */ 699 if (left->next != chunk_list) { 700 tmp = list_entry(left->next, struct dasd_mchunk, list); 701 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) { 702 list_del(&tmp->list); 703 chunk->size += tmp->size + sizeof(struct dasd_mchunk); 704 } 705 } 706 /* Try to merge with left neighbour. */ 707 if (left != chunk_list) { 708 tmp = list_entry(left, struct dasd_mchunk, list); 709 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) { 710 tmp->size += chunk->size + sizeof(struct dasd_mchunk); 711 return; 712 } 713 } 714 __list_add(&chunk->list, left, left->next); 715} 716 717/* 718 * Check if bsize is in { 512, 1024, 2048, 4096 } 719 */ 720static inline int 721dasd_check_blocksize(int bsize) 722{ 723 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize)) 724 return -EMEDIUMTYPE; 725 return 0; 726} 727 728/* 729 * return the callback data of the original request in case there are 730 * ERP requests build on top of it 731 */ 732static inline void *dasd_get_callback_data(struct dasd_ccw_req *cqr) 733{ 734 while (cqr->refers) 735 cqr = cqr->refers; 736 737 return cqr->callback_data; 738} 739 740/* externals in dasd.c */ 741#define DASD_PROFILE_OFF 0 742#define DASD_PROFILE_ON 1 743#define DASD_PROFILE_GLOBAL_ONLY 2 744 745extern debug_info_t *dasd_debug_area; 746extern struct dasd_profile dasd_global_profile; 747extern unsigned int dasd_global_profile_level; 748extern const struct block_device_operations dasd_device_operations; 749 750extern struct kmem_cache *dasd_page_cache; 751 752struct dasd_ccw_req * 753dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *); 754struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *); 755void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); 756void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *); 757void dasd_wakeup_cb(struct dasd_ccw_req *, void *); 758 759struct dasd_device *dasd_alloc_device(void); 760void dasd_free_device(struct dasd_device *); 761 762struct dasd_block *dasd_alloc_block(void); 763void dasd_free_block(struct dasd_block *); 764 765enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved); 766 767void dasd_enable_device(struct dasd_device *); 768void dasd_set_target_state(struct dasd_device *, int); 769void dasd_kick_device(struct dasd_device *); 770void dasd_restore_device(struct dasd_device *); 771void dasd_reload_device(struct dasd_device *); 772void dasd_schedule_requeue(struct dasd_device *); 773 774void dasd_add_request_head(struct dasd_ccw_req *); 775void dasd_add_request_tail(struct dasd_ccw_req *); 776int dasd_start_IO(struct dasd_ccw_req *); 777int dasd_term_IO(struct dasd_ccw_req *); 778void dasd_schedule_device_bh(struct dasd_device *); 779void dasd_schedule_block_bh(struct dasd_block *); 780int dasd_sleep_on(struct dasd_ccw_req *); 781int dasd_sleep_on_queue(struct list_head *); 782int dasd_sleep_on_immediatly(struct dasd_ccw_req *); 783int dasd_sleep_on_queue_interruptible(struct list_head *); 784int dasd_sleep_on_interruptible(struct dasd_ccw_req *); 785void dasd_device_set_timer(struct dasd_device *, int); 786void dasd_device_clear_timer(struct dasd_device *); 787void dasd_block_set_timer(struct dasd_block *, int); 788void dasd_block_clear_timer(struct dasd_block *); 789int dasd_cancel_req(struct dasd_ccw_req *); 790int dasd_flush_device_queue(struct dasd_device *); 791int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *); 792void dasd_generic_free_discipline(struct dasd_device *); 793void dasd_generic_remove (struct ccw_device *cdev); 794int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); 795int dasd_generic_set_offline (struct ccw_device *cdev); 796int dasd_generic_notify(struct ccw_device *, int); 797int dasd_generic_last_path_gone(struct dasd_device *); 798int dasd_generic_path_operational(struct dasd_device *); 799void dasd_generic_shutdown(struct ccw_device *); 800 801void dasd_generic_handle_state_change(struct dasd_device *); 802int dasd_generic_pm_freeze(struct ccw_device *); 803int dasd_generic_restore_device(struct ccw_device *); 804enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *); 805void dasd_generic_path_event(struct ccw_device *, int *); 806int dasd_generic_verify_path(struct dasd_device *, __u8); 807void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *); 808void dasd_generic_space_avail(struct dasd_device *); 809 810int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); 811char *dasd_get_sense(struct irb *); 812 813void dasd_device_set_stop_bits(struct dasd_device *, int); 814void dasd_device_remove_stop_bits(struct dasd_device *, int); 815 816int dasd_device_is_ro(struct dasd_device *); 817 818void dasd_profile_reset(struct dasd_profile *); 819int dasd_profile_on(struct dasd_profile *); 820void dasd_profile_off(struct dasd_profile *); 821char *dasd_get_user_string(const char __user *, size_t); 822 823/* externals in dasd_devmap.c */ 824extern int dasd_max_devindex; 825extern int dasd_probeonly; 826extern int dasd_autodetect; 827extern int dasd_nopav; 828extern int dasd_nofcx; 829 830int dasd_devmap_init(void); 831void dasd_devmap_exit(void); 832 833struct dasd_device *dasd_create_device(struct ccw_device *); 834void dasd_delete_device(struct dasd_device *); 835 836int dasd_get_feature(struct ccw_device *, int); 837int dasd_set_feature(struct ccw_device *, int, int); 838 839int dasd_add_sysfs_files(struct ccw_device *); 840void dasd_remove_sysfs_files(struct ccw_device *); 841 842struct dasd_device *dasd_device_from_cdev(struct ccw_device *); 843struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *); 844struct dasd_device *dasd_device_from_devindex(int); 845 846void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *); 847struct dasd_device *dasd_device_from_gendisk(struct gendisk *); 848 849int dasd_parse(void) __init; 850int dasd_busid_known(const char *); 851 852/* externals in dasd_gendisk.c */ 853int dasd_gendisk_init(void); 854void dasd_gendisk_exit(void); 855int dasd_gendisk_alloc(struct dasd_block *); 856void dasd_gendisk_free(struct dasd_block *); 857int dasd_scan_partitions(struct dasd_block *); 858void dasd_destroy_partitions(struct dasd_block *); 859 860/* externals in dasd_ioctl.c */ 861int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long); 862 863/* externals in dasd_proc.c */ 864int dasd_proc_init(void); 865void dasd_proc_exit(void); 866 867/* externals in dasd_erp.c */ 868struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); 869struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); 870struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int, 871 struct dasd_device *); 872void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); 873void dasd_log_sense(struct dasd_ccw_req *, struct irb *); 874void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb); 875 876/* externals in dasd_3990_erp.c */ 877struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); 878void dasd_3990_erp_handle_sim(struct dasd_device *, char *); 879 880/* externals in dasd_eer.c */ 881#ifdef CONFIG_DASD_EER 882int dasd_eer_init(void); 883void dasd_eer_exit(void); 884int dasd_eer_enable(struct dasd_device *); 885void dasd_eer_disable(struct dasd_device *); 886void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, 887 unsigned int id); 888void dasd_eer_snss(struct dasd_device *); 889 890static inline int dasd_eer_enabled(struct dasd_device *device) 891{ 892 return device->eer_cqr != NULL; 893} 894#else 895#define dasd_eer_init() (0) 896#define dasd_eer_exit() do { } while (0) 897#define dasd_eer_enable(d) (0) 898#define dasd_eer_disable(d) do { } while (0) 899#define dasd_eer_write(d,c,i) do { } while (0) 900#define dasd_eer_snss(d) do { } while (0) 901#define dasd_eer_enabled(d) (0) 902#endif /* CONFIG_DASD_ERR */ 903 904 905/* DASD path handling functions */ 906 907/* 908 * helper functions to modify bit masks for a given channel path for a device 909 */ 910static inline int dasd_path_is_operational(struct dasd_device *device, int chp) 911{ 912 return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 913} 914 915static inline int dasd_path_need_verify(struct dasd_device *device, int chp) 916{ 917 return test_bit(DASD_PATH_TBV, &device->path[chp].flags); 918} 919 920static inline void dasd_path_verify(struct dasd_device *device, int chp) 921{ 922 __set_bit(DASD_PATH_TBV, &device->path[chp].flags); 923} 924 925static inline void dasd_path_clear_verify(struct dasd_device *device, int chp) 926{ 927 __clear_bit(DASD_PATH_TBV, &device->path[chp].flags); 928} 929 930static inline void dasd_path_clear_all_verify(struct dasd_device *device) 931{ 932 int chp; 933 934 for (chp = 0; chp < 8; chp++) 935 dasd_path_clear_verify(device, chp); 936} 937 938static inline void dasd_path_operational(struct dasd_device *device, int chp) 939{ 940 __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 941 device->opm |= (0x80 >> chp); 942} 943 944static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp) 945{ 946 __set_bit(DASD_PATH_NPP, &device->path[chp].flags); 947} 948 949static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp) 950{ 951 return test_bit(DASD_PATH_NPP, &device->path[chp].flags); 952} 953 954static inline void dasd_path_clear_nonpreferred(struct dasd_device *device, 955 int chp) 956{ 957 __clear_bit(DASD_PATH_NPP, &device->path[chp].flags); 958} 959 960static inline void dasd_path_preferred(struct dasd_device *device, int chp) 961{ 962 __set_bit(DASD_PATH_PP, &device->path[chp].flags); 963} 964 965static inline int dasd_path_is_preferred(struct dasd_device *device, int chp) 966{ 967 return test_bit(DASD_PATH_PP, &device->path[chp].flags); 968} 969 970static inline void dasd_path_clear_preferred(struct dasd_device *device, 971 int chp) 972{ 973 __clear_bit(DASD_PATH_PP, &device->path[chp].flags); 974} 975 976static inline void dasd_path_clear_oper(struct dasd_device *device, int chp) 977{ 978 __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 979 device->opm &= ~(0x80 >> chp); 980} 981 982static inline void dasd_path_clear_cable(struct dasd_device *device, int chp) 983{ 984 __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 985} 986 987static inline void dasd_path_cuir(struct dasd_device *device, int chp) 988{ 989 __set_bit(DASD_PATH_CUIR, &device->path[chp].flags); 990} 991 992static inline int dasd_path_is_cuir(struct dasd_device *device, int chp) 993{ 994 return test_bit(DASD_PATH_CUIR, &device->path[chp].flags); 995} 996 997static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp) 998{ 999 __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1000} 1001 1002static inline void dasd_path_ifcc(struct dasd_device *device, int chp) 1003{ 1004 set_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1005} 1006 1007static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp) 1008{ 1009 return test_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1010} 1011 1012static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp) 1013{ 1014 clear_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1015} 1016 1017static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp) 1018{ 1019 __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1020} 1021 1022static inline void dasd_path_miscabled(struct dasd_device *device, int chp) 1023{ 1024 __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1025} 1026 1027static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp) 1028{ 1029 return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1030} 1031 1032static inline void dasd_path_nohpf(struct dasd_device *device, int chp) 1033{ 1034 __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1035} 1036 1037static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp) 1038{ 1039 return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1040} 1041 1042/* 1043 * get functions for path masks 1044 * will return a path masks for the given device 1045 */ 1046 1047static inline __u8 dasd_path_get_opm(struct dasd_device *device) 1048{ 1049 return device->opm; 1050} 1051 1052static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device) 1053{ 1054 int chp; 1055 __u8 tbvpm = 0x00; 1056 1057 for (chp = 0; chp < 8; chp++) 1058 if (dasd_path_need_verify(device, chp)) 1059 tbvpm |= 0x80 >> chp; 1060 return tbvpm; 1061} 1062 1063static inline __u8 dasd_path_get_nppm(struct dasd_device *device) 1064{ 1065 int chp; 1066 __u8 npm = 0x00; 1067 1068 for (chp = 0; chp < 8; chp++) { 1069 if (dasd_path_is_nonpreferred(device, chp)) 1070 npm |= 0x80 >> chp; 1071 } 1072 return npm; 1073} 1074 1075static inline __u8 dasd_path_get_ppm(struct dasd_device *device) 1076{ 1077 int chp; 1078 __u8 ppm = 0x00; 1079 1080 for (chp = 0; chp < 8; chp++) 1081 if (dasd_path_is_preferred(device, chp)) 1082 ppm |= 0x80 >> chp; 1083 return ppm; 1084} 1085 1086static inline __u8 dasd_path_get_cablepm(struct dasd_device *device) 1087{ 1088 int chp; 1089 __u8 cablepm = 0x00; 1090 1091 for (chp = 0; chp < 8; chp++) 1092 if (dasd_path_is_miscabled(device, chp)) 1093 cablepm |= 0x80 >> chp; 1094 return cablepm; 1095} 1096 1097static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device) 1098{ 1099 int chp; 1100 __u8 cuirpm = 0x00; 1101 1102 for (chp = 0; chp < 8; chp++) 1103 if (dasd_path_is_cuir(device, chp)) 1104 cuirpm |= 0x80 >> chp; 1105 return cuirpm; 1106} 1107 1108static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device) 1109{ 1110 int chp; 1111 __u8 ifccpm = 0x00; 1112 1113 for (chp = 0; chp < 8; chp++) 1114 if (dasd_path_is_ifcc(device, chp)) 1115 ifccpm |= 0x80 >> chp; 1116 return ifccpm; 1117} 1118 1119static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device) 1120{ 1121 int chp; 1122 __u8 hpfpm = 0x00; 1123 1124 for (chp = 0; chp < 8; chp++) 1125 if (dasd_path_is_nohpf(device, chp)) 1126 hpfpm |= 0x80 >> chp; 1127 return hpfpm; 1128} 1129 1130/* 1131 * add functions for path masks 1132 * the existing path mask will be extended by the given path mask 1133 */ 1134static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm) 1135{ 1136 int chp; 1137 1138 for (chp = 0; chp < 8; chp++) 1139 if (pm & (0x80 >> chp)) 1140 dasd_path_verify(device, chp); 1141} 1142 1143static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device) 1144{ 1145 int chp; 1146 __u8 nopm = 0x00; 1147 1148 for (chp = 0; chp < 8; chp++) 1149 if (dasd_path_is_nohpf(device, chp) || 1150 dasd_path_is_ifcc(device, chp) || 1151 dasd_path_is_cuir(device, chp) || 1152 dasd_path_is_miscabled(device, chp)) 1153 nopm |= 0x80 >> chp; 1154 return nopm; 1155} 1156 1157static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm) 1158{ 1159 int chp; 1160 1161 for (chp = 0; chp < 8; chp++) 1162 if (pm & (0x80 >> chp)) { 1163 dasd_path_operational(device, chp); 1164 /* 1165 * if the path is used 1166 * it should not be in one of the negative lists 1167 */ 1168 dasd_path_clear_nohpf(device, chp); 1169 dasd_path_clear_cuir(device, chp); 1170 dasd_path_clear_cable(device, chp); 1171 dasd_path_clear_ifcc(device, chp); 1172 } 1173} 1174 1175static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm) 1176{ 1177 int chp; 1178 1179 for (chp = 0; chp < 8; chp++) 1180 if (pm & (0x80 >> chp)) 1181 dasd_path_miscabled(device, chp); 1182} 1183 1184static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm) 1185{ 1186 int chp; 1187 1188 for (chp = 0; chp < 8; chp++) 1189 if (pm & (0x80 >> chp)) 1190 dasd_path_cuir(device, chp); 1191} 1192 1193static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm) 1194{ 1195 int chp; 1196 1197 for (chp = 0; chp < 8; chp++) 1198 if (pm & (0x80 >> chp)) 1199 dasd_path_ifcc(device, chp); 1200} 1201 1202static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm) 1203{ 1204 int chp; 1205 1206 for (chp = 0; chp < 8; chp++) 1207 if (pm & (0x80 >> chp)) 1208 dasd_path_nonpreferred(device, chp); 1209} 1210 1211static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm) 1212{ 1213 int chp; 1214 1215 for (chp = 0; chp < 8; chp++) 1216 if (pm & (0x80 >> chp)) 1217 dasd_path_nohpf(device, chp); 1218} 1219 1220static inline void dasd_path_add_ppm(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_preferred(device, chp); 1227} 1228 1229/* 1230 * set functions for path masks 1231 * the existing path mask will be replaced by the given path mask 1232 */ 1233static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm) 1234{ 1235 int chp; 1236 1237 for (chp = 0; chp < 8; chp++) 1238 if (pm & (0x80 >> chp)) 1239 dasd_path_verify(device, chp); 1240 else 1241 dasd_path_clear_verify(device, chp); 1242} 1243 1244static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm) 1245{ 1246 int chp; 1247 1248 for (chp = 0; chp < 8; chp++) { 1249 dasd_path_clear_oper(device, chp); 1250 if (pm & (0x80 >> chp)) { 1251 dasd_path_operational(device, chp); 1252 /* 1253 * if the path is used 1254 * it should not be in one of the negative lists 1255 */ 1256 dasd_path_clear_nohpf(device, chp); 1257 dasd_path_clear_cuir(device, chp); 1258 dasd_path_clear_cable(device, chp); 1259 dasd_path_clear_ifcc(device, chp); 1260 } 1261 } 1262} 1263 1264/* 1265 * remove functions for path masks 1266 * the existing path mask will be cleared with the given path mask 1267 */ 1268static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm) 1269{ 1270 int chp; 1271 1272 for (chp = 0; chp < 8; chp++) { 1273 if (pm & (0x80 >> chp)) 1274 dasd_path_clear_oper(device, chp); 1275 } 1276} 1277 1278/* 1279 * add the newly available path to the to be verified pm and remove it from 1280 * normal operation until it is verified 1281 */ 1282static inline void dasd_path_available(struct dasd_device *device, int chp) 1283{ 1284 dasd_path_clear_oper(device, chp); 1285 dasd_path_verify(device, chp); 1286} 1287 1288static inline void dasd_path_notoper(struct dasd_device *device, int chp) 1289{ 1290 dasd_path_clear_oper(device, chp); 1291 dasd_path_clear_preferred(device, chp); 1292 dasd_path_clear_nonpreferred(device, chp); 1293} 1294 1295/* 1296 * remove all paths from normal operation 1297 */ 1298static inline void dasd_path_no_path(struct dasd_device *device) 1299{ 1300 int chp; 1301 1302 for (chp = 0; chp < 8; chp++) 1303 dasd_path_notoper(device, chp); 1304 1305 dasd_path_clear_all_verify(device); 1306} 1307 1308/* end - path handling */ 1309 1310#endif /* DASD_H */ 1311