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 */ 70 struct dasd_device; 71 struct 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...) \ 92 do { \ 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...)\ 100 do { \ 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...) \ 108 do { \ 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...)\ 132 do { \ 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...)\ 139 do { \ 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...)\ 146 do { \ 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...)\ 152 do { \ 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) 158 159 struct 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 }; 191 192 /* 193 * dasd_ccw_req -> status can be: 194 */ 195 #define DASD_CQR_FILLED 0x00 /* request is ready to be processed */ 196 #define DASD_CQR_DONE 0x01 /* request is completed successfully */ 197 #define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */ 198 #define DASD_CQR_IN_ERP 0x03 /* request is in recovery */ 199 #define DASD_CQR_FAILED 0x04 /* request is finally failed */ 200 #define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */ 201 202 #define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */ 203 #define DASD_CQR_IN_IO 0x81 /* request is currently in IO */ 204 #define DASD_CQR_ERROR 0x82 /* request is completed with error */ 205 #define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */ 206 #define DASD_CQR_CLEARED 0x84 /* request was cleared */ 207 #define DASD_CQR_SUCCESS 0x85 /* request was successful */ 208 209 /* default expiration time*/ 210 #define DASD_EXPIRES 300 211 #define DASD_EXPIRES_MAX 40000000 212 #define DASD_RETRIES 256 213 #define DASD_RETRIES_MAX 32768 214 215 /* per dasd_ccw_req flags */ 216 #define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */ 217 #define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */ 218 #define DASD_CQR_VERIFY_PATH 2 /* path verification request */ 219 #define DASD_CQR_ALLOW_SLOCK 3 /* Try this request even when lock was 220 * stolen. Should not be combined with 221 * DASD_CQR_FLAGS_USE_ERP 222 */ 223 /* 224 * The following flags are used to suppress output of certain errors. 225 */ 226 #define DASD_CQR_SUPPRESS_NRF 4 /* Suppress 'No Record Found' error */ 227 #define DASD_CQR_SUPPRESS_FP 5 /* Suppress 'File Protected' error*/ 228 #define DASD_CQR_SUPPRESS_IL 6 /* Suppress 'Incorrect Length' error */ 229 #define DASD_CQR_SUPPRESS_CR 7 /* Suppress 'Command Reject' error */ 230 231 /* 232 * There is no reliable way to determine the number of available CPUs on 233 * LPAR but there is no big performance difference between 1 and the 234 * maximum CPU number. 235 * 64 is a good trade off performance wise. 236 */ 237 #define DASD_NR_HW_QUEUES 64 238 #define DASD_MAX_LCU_DEV 256 239 #define DASD_REQ_PER_DEV 4 240 241 /* Signature for error recovery functions. */ 242 typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *); 243 244 /* 245 * A single CQR can only contain a maximum of 255 CCWs. It is limited by 246 * the locate record and locate record extended count value which can only hold 247 * 1 Byte max. 248 */ 249 #define DASD_CQR_MAX_CCW 255 250 251 /* 252 * Unique identifier for dasd device. 253 */ 254 #define UA_NOT_CONFIGURED 0x00 255 #define UA_BASE_DEVICE 0x01 256 #define UA_BASE_PAV_ALIAS 0x02 257 #define UA_HYPER_PAV_ALIAS 0x03 258 259 struct dasd_uid { 260 __u8 type; 261 char vendor[4]; 262 char serial[15]; 263 __u16 ssid; 264 __u8 real_unit_addr; 265 __u8 base_unit_addr; 266 char vduit[33]; 267 }; 268 269 /* 270 * the struct dasd_discipline is 271 * sth like a table of virtual functions, if you think of dasd_eckd 272 * inheriting dasd... 273 * no, currently we are not planning to reimplement the driver in C++ 274 */ 275 struct dasd_discipline { 276 struct module *owner; 277 char ebcname[8]; /* a name used for tagging and printks */ 278 char name[8]; /* a name used for tagging and printks */ 279 int max_blocks; /* maximum number of blocks to be chained */ 280 281 struct list_head list; /* used for list of disciplines */ 282 283 /* 284 * Device recognition functions. check_device is used to verify 285 * the sense data and the information returned by read device 286 * characteristics. It returns 0 if the discipline can be used 287 * for the device in question. uncheck_device is called during 288 * device shutdown to deregister a device from its discipline. 289 */ 290 int (*check_device) (struct dasd_device *); 291 void (*uncheck_device) (struct dasd_device *); 292 293 /* 294 * do_analysis is used in the step from device state "basic" to 295 * state "accept". It returns 0 if the device can be made ready, 296 * it returns -EMEDIUMTYPE if the device can't be made ready or 297 * -EAGAIN if do_analysis started a ccw that needs to complete 298 * before the analysis may be repeated. 299 */ 300 int (*do_analysis) (struct dasd_block *); 301 302 /* 303 * This function is called, when new paths become available. 304 * Disciplins may use this callback to do necessary setup work, 305 * e.g. verify that new path is compatible with the current 306 * configuration. 307 */ 308 int (*verify_path)(struct dasd_device *, __u8); 309 310 /* 311 * Last things to do when a device is set online, and first things 312 * when it is set offline. 313 */ 314 int (*basic_to_ready) (struct dasd_device *); 315 int (*online_to_ready) (struct dasd_device *); 316 int (*basic_to_known)(struct dasd_device *); 317 318 /* (struct dasd_device *); 319 * Device operation functions. build_cp creates a ccw chain for 320 * a block device request, start_io starts the request and 321 * term_IO cancels it (e.g. in case of a timeout). format_device 322 * formats the device and check_device_format compares the format of 323 * a device with the expected format_data. 324 * handle_terminated_request allows to examine a cqr and prepare 325 * it for retry. 326 */ 327 struct dasd_ccw_req *(*build_cp) (struct dasd_device *, 328 struct dasd_block *, 329 struct request *); 330 int (*start_IO) (struct dasd_ccw_req *); 331 int (*term_IO) (struct dasd_ccw_req *); 332 void (*handle_terminated_request) (struct dasd_ccw_req *); 333 int (*format_device) (struct dasd_device *, 334 struct format_data_t *, int); 335 int (*check_device_format)(struct dasd_device *, 336 struct format_check_t *, int); 337 int (*free_cp) (struct dasd_ccw_req *, struct request *); 338 339 /* 340 * Error recovery functions. examine_error() returns a value that 341 * indicates what to do for an error condition. If examine_error() 342 * returns 'dasd_era_recover' erp_action() is called to create a 343 * special error recovery ccw. erp_postaction() is called after 344 * an error recovery ccw has finished its execution. dump_sense 345 * is called for every error condition to print the sense data 346 * to the console. 347 */ 348 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); 349 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); 350 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, 351 struct irb *); 352 void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *); 353 void (*check_for_device_change) (struct dasd_device *, 354 struct dasd_ccw_req *, 355 struct irb *); 356 357 /* i/o control functions. */ 358 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *); 359 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); 360 int (*ioctl) (struct dasd_block *, unsigned int, void __user *); 361 362 /* suspend/resume functions */ 363 int (*freeze) (struct dasd_device *); 364 int (*restore) (struct dasd_device *); 365 366 /* reload device after state change */ 367 int (*reload) (struct dasd_device *); 368 369 int (*get_uid) (struct dasd_device *, struct dasd_uid *); 370 void (*kick_validate) (struct dasd_device *); 371 int (*check_attention)(struct dasd_device *, __u8); 372 int (*host_access_count)(struct dasd_device *); 373 int (*hosts_print)(struct dasd_device *, struct seq_file *); 374 void (*handle_hpf_error)(struct dasd_device *, struct irb *); 375 void (*disable_hpf)(struct dasd_device *); 376 int (*hpf_enabled)(struct dasd_device *); 377 void (*reset_path)(struct dasd_device *, __u8); 378 }; 379 380 extern struct dasd_discipline *dasd_diag_discipline_pointer; 381 382 /* 383 * Notification numbers for extended error reporting notifications: 384 * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's 385 * eer pointer) is freed. The error reporting module needs to do all necessary 386 * cleanup steps. 387 * The DASD_EER_TRIGGER notification sends the actual error reports (triggers). 388 */ 389 #define DASD_EER_DISABLE 0 390 #define DASD_EER_TRIGGER 1 391 392 /* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */ 393 #define DASD_EER_FATALERROR 1 394 #define DASD_EER_NOPATH 2 395 #define DASD_EER_STATECHANGE 3 396 #define DASD_EER_PPRCSUSPEND 4 397 398 /* DASD path handling */ 399 400 #define DASD_PATH_OPERATIONAL 1 401 #define DASD_PATH_TBV 2 402 #define DASD_PATH_PP 3 403 #define DASD_PATH_NPP 4 404 #define DASD_PATH_MISCABLED 5 405 #define DASD_PATH_NOHPF 6 406 #define DASD_PATH_CUIR 7 407 #define DASD_PATH_IFCC 8 408 409 #define DASD_THRHLD_MAX 4294967295U 410 #define DASD_INTERVAL_MAX 4294967295U 411 412 struct dasd_path { 413 unsigned long flags; 414 u8 cssid; 415 u8 ssid; 416 u8 chpid; 417 struct dasd_conf_data *conf_data; 418 atomic_t error_count; 419 unsigned long errorclk; 420 }; 421 422 423 struct dasd_profile_info { 424 /* legacy part of profile data, as in dasd_profile_info_t */ 425 unsigned int dasd_io_reqs; /* number of requests processed */ 426 unsigned int dasd_io_sects; /* number of sectors processed */ 427 unsigned int dasd_io_secs[32]; /* histogram of request's sizes */ 428 unsigned int dasd_io_times[32]; /* histogram of requests's times */ 429 unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */ 430 unsigned int dasd_io_time1[32]; /* hist. of time from build to start */ 431 unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */ 432 unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */ 433 unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */ 434 unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */ 435 436 /* new data */ 437 struct timespec64 starttod; /* time of start or last reset */ 438 unsigned int dasd_io_alias; /* requests using an alias */ 439 unsigned int dasd_io_tpm; /* requests using transport mode */ 440 unsigned int dasd_read_reqs; /* total number of read requests */ 441 unsigned int dasd_read_sects; /* total number read sectors */ 442 unsigned int dasd_read_alias; /* read request using an alias */ 443 unsigned int dasd_read_tpm; /* read requests in transport mode */ 444 unsigned int dasd_read_secs[32]; /* histogram of request's sizes */ 445 unsigned int dasd_read_times[32]; /* histogram of requests's times */ 446 unsigned int dasd_read_time1[32]; /* hist. time from build to start */ 447 unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */ 448 unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */ 449 unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */ 450 unsigned long dasd_sum_times; /* sum of request times */ 451 unsigned long dasd_sum_time_str; /* sum of time from build to start */ 452 unsigned long dasd_sum_time_irq; /* sum of time from start to irq */ 453 unsigned long dasd_sum_time_end; /* sum of time from irq to end */ 454 }; 455 456 struct dasd_profile { 457 struct dentry *dentry; 458 struct dasd_profile_info *data; 459 spinlock_t lock; 460 }; 461 462 struct dasd_device { 463 /* Block device stuff. */ 464 struct dasd_block *block; 465 466 unsigned int devindex; 467 unsigned long flags; /* per device flags */ 468 unsigned short features; /* copy of devmap-features (read-only!) */ 469 470 /* extended error reporting stuff (eer) */ 471 struct dasd_ccw_req *eer_cqr; 472 473 /* Device discipline stuff. */ 474 struct dasd_discipline *discipline; 475 struct dasd_discipline *base_discipline; 476 void *private; 477 struct dasd_path path[8]; 478 __u8 opm; 479 480 /* Device state and target state. */ 481 int state, target; 482 struct mutex state_mutex; 483 int stopped; /* device (ccw_device_start) was stopped */ 484 485 /* reference count. */ 486 atomic_t ref_count; 487 488 /* ccw queue and memory for static ccw/erp buffers. */ 489 struct list_head ccw_queue; 490 spinlock_t mem_lock; 491 void *ccw_mem; 492 void *erp_mem; 493 struct list_head ccw_chunks; 494 struct list_head erp_chunks; 495 496 atomic_t tasklet_scheduled; 497 struct tasklet_struct tasklet; 498 struct work_struct kick_work; 499 struct work_struct restore_device; 500 struct work_struct reload_device; 501 struct work_struct kick_validate; 502 struct work_struct suc_work; 503 struct work_struct requeue_requests; 504 struct timer_list timer; 505 506 debug_info_t *debug_area; 507 508 struct ccw_device *cdev; 509 510 /* hook for alias management */ 511 struct list_head alias_list; 512 513 /* default expiration time in s */ 514 unsigned long default_expires; 515 unsigned long default_retries; 516 517 unsigned long blk_timeout; 518 519 unsigned long path_thrhld; 520 unsigned long path_interval; 521 522 struct dentry *debugfs_dentry; 523 struct dentry *hosts_dentry; 524 struct dasd_profile profile; 525 }; 526 527 struct dasd_block { 528 /* Block device stuff. */ 529 struct gendisk *gdp; 530 struct request_queue *request_queue; 531 spinlock_t request_queue_lock; 532 struct blk_mq_tag_set tag_set; 533 struct block_device *bdev; 534 atomic_t open_count; 535 536 unsigned long blocks; /* size of volume in blocks */ 537 unsigned int bp_block; /* bytes per block */ 538 unsigned int s2b_shift; /* log2 (bp_block/512) */ 539 540 struct dasd_device *base; 541 struct list_head ccw_queue; 542 spinlock_t queue_lock; 543 544 atomic_t tasklet_scheduled; 545 struct tasklet_struct tasklet; 546 struct timer_list timer; 547 548 struct dentry *debugfs_dentry; 549 struct dasd_profile profile; 550 }; 551 552 struct dasd_attention_data { 553 struct dasd_device *device; 554 __u8 lpum; 555 }; 556 557 struct dasd_queue { 558 spinlock_t lock; 559 }; 560 561 /* reasons why device (ccw_device_start) was stopped */ 562 #define DASD_STOPPED_NOT_ACC 1 /* not accessible */ 563 #define DASD_STOPPED_QUIESCE 2 /* Quiesced */ 564 #define DASD_STOPPED_PENDING 4 /* long busy */ 565 #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ 566 #define DASD_STOPPED_SU 16 /* summary unit check handling */ 567 #define DASD_STOPPED_PM 32 /* pm state transition */ 568 #define DASD_UNRESUMED_PM 64 /* pm resume failed state */ 569 570 /* per device flags */ 571 #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ 572 #define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ 573 #define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ 574 #define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't 575 * confuse this with the user specified 576 * read-only feature. 577 */ 578 #define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */ 579 #define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */ 580 #define DASD_FLAG_SUSPENDED 9 /* The device was suspended */ 581 #define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/ 582 #define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */ 583 #define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */ 584 #define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */ 585 #define DASD_FLAG_SUC 14 /* unhandled summary unit check */ 586 587 #define DASD_SLEEPON_START_TAG ((void *) 1) 588 #define DASD_SLEEPON_END_TAG ((void *) 2) 589 590 void dasd_put_device_wake(struct dasd_device *); 591 592 /* 593 * Reference count inliners 594 */ 595 static inline void 596 dasd_get_device(struct dasd_device *device) 597 { 598 atomic_inc(&device->ref_count); 599 } 600 601 static inline void 602 dasd_put_device(struct dasd_device *device) 603 { 604 if (atomic_dec_return(&device->ref_count) == 0) 605 dasd_put_device_wake(device); 606 } 607 608 /* 609 * The static memory in ccw_mem and erp_mem is managed by a sorted 610 * list of free memory chunks. 611 */ 612 struct dasd_mchunk 613 { 614 struct list_head list; 615 unsigned long size; 616 } __attribute__ ((aligned(8))); 617 618 static inline void 619 dasd_init_chunklist(struct list_head *chunk_list, void *mem, 620 unsigned long size) 621 { 622 struct dasd_mchunk *chunk; 623 624 INIT_LIST_HEAD(chunk_list); 625 chunk = (struct dasd_mchunk *) mem; 626 chunk->size = size - sizeof(struct dasd_mchunk); 627 list_add(&chunk->list, chunk_list); 628 } 629 630 static inline void * 631 dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size) 632 { 633 struct dasd_mchunk *chunk, *tmp; 634 635 size = (size + 7L) & -8L; 636 list_for_each_entry(chunk, chunk_list, list) { 637 if (chunk->size < size) 638 continue; 639 if (chunk->size > size + sizeof(struct dasd_mchunk)) { 640 char *endaddr = (char *) (chunk + 1) + chunk->size; 641 tmp = (struct dasd_mchunk *) (endaddr - size) - 1; 642 tmp->size = size; 643 chunk->size -= size + sizeof(struct dasd_mchunk); 644 chunk = tmp; 645 } else 646 list_del(&chunk->list); 647 return (void *) (chunk + 1); 648 } 649 return NULL; 650 } 651 652 static inline void 653 dasd_free_chunk(struct list_head *chunk_list, void *mem) 654 { 655 struct dasd_mchunk *chunk, *tmp; 656 struct list_head *p, *left; 657 658 chunk = (struct dasd_mchunk *) 659 ((char *) mem - sizeof(struct dasd_mchunk)); 660 /* Find out the left neighbour in chunk_list. */ 661 left = chunk_list; 662 list_for_each(p, chunk_list) { 663 if (list_entry(p, struct dasd_mchunk, list) > chunk) 664 break; 665 left = p; 666 } 667 /* Try to merge with right neighbour = next element from left. */ 668 if (left->next != chunk_list) { 669 tmp = list_entry(left->next, struct dasd_mchunk, list); 670 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) { 671 list_del(&tmp->list); 672 chunk->size += tmp->size + sizeof(struct dasd_mchunk); 673 } 674 } 675 /* Try to merge with left neighbour. */ 676 if (left != chunk_list) { 677 tmp = list_entry(left, struct dasd_mchunk, list); 678 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) { 679 tmp->size += chunk->size + sizeof(struct dasd_mchunk); 680 return; 681 } 682 } 683 __list_add(&chunk->list, left, left->next); 684 } 685 686 /* 687 * Check if bsize is in { 512, 1024, 2048, 4096 } 688 */ 689 static inline int 690 dasd_check_blocksize(int bsize) 691 { 692 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize)) 693 return -EMEDIUMTYPE; 694 return 0; 695 } 696 697 /* externals in dasd.c */ 698 #define DASD_PROFILE_OFF 0 699 #define DASD_PROFILE_ON 1 700 #define DASD_PROFILE_GLOBAL_ONLY 2 701 702 extern debug_info_t *dasd_debug_area; 703 extern struct dasd_profile dasd_global_profile; 704 extern unsigned int dasd_global_profile_level; 705 extern const struct block_device_operations dasd_device_operations; 706 707 extern struct kmem_cache *dasd_page_cache; 708 709 struct dasd_ccw_req * 710 dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *); 711 void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); 712 void dasd_wakeup_cb(struct dasd_ccw_req *, void *); 713 714 struct dasd_device *dasd_alloc_device(void); 715 void dasd_free_device(struct dasd_device *); 716 717 struct dasd_block *dasd_alloc_block(void); 718 void dasd_free_block(struct dasd_block *); 719 720 enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved); 721 722 void dasd_enable_device(struct dasd_device *); 723 void dasd_set_target_state(struct dasd_device *, int); 724 void dasd_kick_device(struct dasd_device *); 725 void dasd_restore_device(struct dasd_device *); 726 void dasd_reload_device(struct dasd_device *); 727 void dasd_schedule_requeue(struct dasd_device *); 728 729 void dasd_add_request_head(struct dasd_ccw_req *); 730 void dasd_add_request_tail(struct dasd_ccw_req *); 731 int dasd_start_IO(struct dasd_ccw_req *); 732 int dasd_term_IO(struct dasd_ccw_req *); 733 void dasd_schedule_device_bh(struct dasd_device *); 734 void dasd_schedule_block_bh(struct dasd_block *); 735 int dasd_sleep_on(struct dasd_ccw_req *); 736 int dasd_sleep_on_queue(struct list_head *); 737 int dasd_sleep_on_immediatly(struct dasd_ccw_req *); 738 int dasd_sleep_on_interruptible(struct dasd_ccw_req *); 739 void dasd_device_set_timer(struct dasd_device *, int); 740 void dasd_device_clear_timer(struct dasd_device *); 741 void dasd_block_set_timer(struct dasd_block *, int); 742 void dasd_block_clear_timer(struct dasd_block *); 743 int dasd_cancel_req(struct dasd_ccw_req *); 744 int dasd_flush_device_queue(struct dasd_device *); 745 int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *); 746 void dasd_generic_free_discipline(struct dasd_device *); 747 void dasd_generic_remove (struct ccw_device *cdev); 748 int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); 749 int dasd_generic_set_offline (struct ccw_device *cdev); 750 int dasd_generic_notify(struct ccw_device *, int); 751 int dasd_generic_last_path_gone(struct dasd_device *); 752 int dasd_generic_path_operational(struct dasd_device *); 753 void dasd_generic_shutdown(struct ccw_device *); 754 755 void dasd_generic_handle_state_change(struct dasd_device *); 756 int dasd_generic_pm_freeze(struct ccw_device *); 757 int dasd_generic_restore_device(struct ccw_device *); 758 enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *); 759 void dasd_generic_path_event(struct ccw_device *, int *); 760 int dasd_generic_verify_path(struct dasd_device *, __u8); 761 762 int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); 763 char *dasd_get_sense(struct irb *); 764 765 void dasd_device_set_stop_bits(struct dasd_device *, int); 766 void dasd_device_remove_stop_bits(struct dasd_device *, int); 767 768 int dasd_device_is_ro(struct dasd_device *); 769 770 void dasd_profile_reset(struct dasd_profile *); 771 int dasd_profile_on(struct dasd_profile *); 772 void dasd_profile_off(struct dasd_profile *); 773 char *dasd_get_user_string(const char __user *, size_t); 774 775 /* externals in dasd_devmap.c */ 776 extern int dasd_max_devindex; 777 extern int dasd_probeonly; 778 extern int dasd_autodetect; 779 extern int dasd_nopav; 780 extern int dasd_nofcx; 781 782 int dasd_devmap_init(void); 783 void dasd_devmap_exit(void); 784 785 struct dasd_device *dasd_create_device(struct ccw_device *); 786 void dasd_delete_device(struct dasd_device *); 787 788 int dasd_get_feature(struct ccw_device *, int); 789 int dasd_set_feature(struct ccw_device *, int, int); 790 791 int dasd_add_sysfs_files(struct ccw_device *); 792 void dasd_remove_sysfs_files(struct ccw_device *); 793 794 struct dasd_device *dasd_device_from_cdev(struct ccw_device *); 795 struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *); 796 struct dasd_device *dasd_device_from_devindex(int); 797 798 void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *); 799 struct dasd_device *dasd_device_from_gendisk(struct gendisk *); 800 801 int dasd_parse(void) __init; 802 int dasd_busid_known(const char *); 803 804 /* externals in dasd_gendisk.c */ 805 int dasd_gendisk_init(void); 806 void dasd_gendisk_exit(void); 807 int dasd_gendisk_alloc(struct dasd_block *); 808 void dasd_gendisk_free(struct dasd_block *); 809 int dasd_scan_partitions(struct dasd_block *); 810 void dasd_destroy_partitions(struct dasd_block *); 811 812 /* externals in dasd_ioctl.c */ 813 int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long); 814 815 /* externals in dasd_proc.c */ 816 int dasd_proc_init(void); 817 void dasd_proc_exit(void); 818 819 /* externals in dasd_erp.c */ 820 struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); 821 struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); 822 struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int, 823 struct dasd_device *); 824 void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); 825 void dasd_log_sense(struct dasd_ccw_req *, struct irb *); 826 void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb); 827 828 /* externals in dasd_3990_erp.c */ 829 struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); 830 void dasd_3990_erp_handle_sim(struct dasd_device *, char *); 831 832 /* externals in dasd_eer.c */ 833 #ifdef CONFIG_DASD_EER 834 int dasd_eer_init(void); 835 void dasd_eer_exit(void); 836 int dasd_eer_enable(struct dasd_device *); 837 void dasd_eer_disable(struct dasd_device *); 838 void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, 839 unsigned int id); 840 void dasd_eer_snss(struct dasd_device *); 841 842 static inline int dasd_eer_enabled(struct dasd_device *device) 843 { 844 return device->eer_cqr != NULL; 845 } 846 #else 847 #define dasd_eer_init() (0) 848 #define dasd_eer_exit() do { } while (0) 849 #define dasd_eer_enable(d) (0) 850 #define dasd_eer_disable(d) do { } while (0) 851 #define dasd_eer_write(d,c,i) do { } while (0) 852 #define dasd_eer_snss(d) do { } while (0) 853 #define dasd_eer_enabled(d) (0) 854 #endif /* CONFIG_DASD_ERR */ 855 856 857 /* DASD path handling functions */ 858 859 /* 860 * helper functions to modify bit masks for a given channel path for a device 861 */ 862 static inline int dasd_path_is_operational(struct dasd_device *device, int chp) 863 { 864 return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 865 } 866 867 static inline int dasd_path_need_verify(struct dasd_device *device, int chp) 868 { 869 return test_bit(DASD_PATH_TBV, &device->path[chp].flags); 870 } 871 872 static inline void dasd_path_verify(struct dasd_device *device, int chp) 873 { 874 __set_bit(DASD_PATH_TBV, &device->path[chp].flags); 875 } 876 877 static inline void dasd_path_clear_verify(struct dasd_device *device, int chp) 878 { 879 __clear_bit(DASD_PATH_TBV, &device->path[chp].flags); 880 } 881 882 static inline void dasd_path_clear_all_verify(struct dasd_device *device) 883 { 884 int chp; 885 886 for (chp = 0; chp < 8; chp++) 887 dasd_path_clear_verify(device, chp); 888 } 889 890 static inline void dasd_path_operational(struct dasd_device *device, int chp) 891 { 892 __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 893 device->opm |= (0x80 >> chp); 894 } 895 896 static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp) 897 { 898 __set_bit(DASD_PATH_NPP, &device->path[chp].flags); 899 } 900 901 static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp) 902 { 903 return test_bit(DASD_PATH_NPP, &device->path[chp].flags); 904 } 905 906 static inline void dasd_path_clear_nonpreferred(struct dasd_device *device, 907 int chp) 908 { 909 __clear_bit(DASD_PATH_NPP, &device->path[chp].flags); 910 } 911 912 static inline void dasd_path_preferred(struct dasd_device *device, int chp) 913 { 914 __set_bit(DASD_PATH_PP, &device->path[chp].flags); 915 } 916 917 static inline int dasd_path_is_preferred(struct dasd_device *device, int chp) 918 { 919 return test_bit(DASD_PATH_PP, &device->path[chp].flags); 920 } 921 922 static inline void dasd_path_clear_preferred(struct dasd_device *device, 923 int chp) 924 { 925 __clear_bit(DASD_PATH_PP, &device->path[chp].flags); 926 } 927 928 static inline void dasd_path_clear_oper(struct dasd_device *device, int chp) 929 { 930 __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 931 device->opm &= ~(0x80 >> chp); 932 } 933 934 static inline void dasd_path_clear_cable(struct dasd_device *device, int chp) 935 { 936 __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 937 } 938 939 static inline void dasd_path_cuir(struct dasd_device *device, int chp) 940 { 941 __set_bit(DASD_PATH_CUIR, &device->path[chp].flags); 942 } 943 944 static inline int dasd_path_is_cuir(struct dasd_device *device, int chp) 945 { 946 return test_bit(DASD_PATH_CUIR, &device->path[chp].flags); 947 } 948 949 static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp) 950 { 951 __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags); 952 } 953 954 static inline void dasd_path_ifcc(struct dasd_device *device, int chp) 955 { 956 set_bit(DASD_PATH_IFCC, &device->path[chp].flags); 957 } 958 959 static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp) 960 { 961 return test_bit(DASD_PATH_IFCC, &device->path[chp].flags); 962 } 963 964 static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp) 965 { 966 clear_bit(DASD_PATH_IFCC, &device->path[chp].flags); 967 } 968 969 static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp) 970 { 971 __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 972 } 973 974 static inline void dasd_path_miscabled(struct dasd_device *device, int chp) 975 { 976 __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 977 } 978 979 static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp) 980 { 981 return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 982 } 983 984 static inline void dasd_path_nohpf(struct dasd_device *device, int chp) 985 { 986 __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 987 } 988 989 static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp) 990 { 991 return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 992 } 993 994 /* 995 * get functions for path masks 996 * will return a path masks for the given device 997 */ 998 999 static inline __u8 dasd_path_get_opm(struct dasd_device *device) 1000 { 1001 return device->opm; 1002 } 1003 1004 static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device) 1005 { 1006 int chp; 1007 __u8 tbvpm = 0x00; 1008 1009 for (chp = 0; chp < 8; chp++) 1010 if (dasd_path_need_verify(device, chp)) 1011 tbvpm |= 0x80 >> chp; 1012 return tbvpm; 1013 } 1014 1015 static inline __u8 dasd_path_get_nppm(struct dasd_device *device) 1016 { 1017 int chp; 1018 __u8 npm = 0x00; 1019 1020 for (chp = 0; chp < 8; chp++) { 1021 if (dasd_path_is_nonpreferred(device, chp)) 1022 npm |= 0x80 >> chp; 1023 } 1024 return npm; 1025 } 1026 1027 static inline __u8 dasd_path_get_ppm(struct dasd_device *device) 1028 { 1029 int chp; 1030 __u8 ppm = 0x00; 1031 1032 for (chp = 0; chp < 8; chp++) 1033 if (dasd_path_is_preferred(device, chp)) 1034 ppm |= 0x80 >> chp; 1035 return ppm; 1036 } 1037 1038 static inline __u8 dasd_path_get_cablepm(struct dasd_device *device) 1039 { 1040 int chp; 1041 __u8 cablepm = 0x00; 1042 1043 for (chp = 0; chp < 8; chp++) 1044 if (dasd_path_is_miscabled(device, chp)) 1045 cablepm |= 0x80 >> chp; 1046 return cablepm; 1047 } 1048 1049 static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device) 1050 { 1051 int chp; 1052 __u8 cuirpm = 0x00; 1053 1054 for (chp = 0; chp < 8; chp++) 1055 if (dasd_path_is_cuir(device, chp)) 1056 cuirpm |= 0x80 >> chp; 1057 return cuirpm; 1058 } 1059 1060 static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device) 1061 { 1062 int chp; 1063 __u8 ifccpm = 0x00; 1064 1065 for (chp = 0; chp < 8; chp++) 1066 if (dasd_path_is_ifcc(device, chp)) 1067 ifccpm |= 0x80 >> chp; 1068 return ifccpm; 1069 } 1070 1071 static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device) 1072 { 1073 int chp; 1074 __u8 hpfpm = 0x00; 1075 1076 for (chp = 0; chp < 8; chp++) 1077 if (dasd_path_is_nohpf(device, chp)) 1078 hpfpm |= 0x80 >> chp; 1079 return hpfpm; 1080 } 1081 1082 /* 1083 * add functions for path masks 1084 * the existing path mask will be extended by the given path mask 1085 */ 1086 static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm) 1087 { 1088 int chp; 1089 1090 for (chp = 0; chp < 8; chp++) 1091 if (pm & (0x80 >> chp)) 1092 dasd_path_verify(device, chp); 1093 } 1094 1095 static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device) 1096 { 1097 int chp; 1098 __u8 nopm = 0x00; 1099 1100 for (chp = 0; chp < 8; chp++) 1101 if (dasd_path_is_nohpf(device, chp) || 1102 dasd_path_is_ifcc(device, chp) || 1103 dasd_path_is_cuir(device, chp) || 1104 dasd_path_is_miscabled(device, chp)) 1105 nopm |= 0x80 >> chp; 1106 return nopm; 1107 } 1108 1109 static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm) 1110 { 1111 int chp; 1112 1113 for (chp = 0; chp < 8; chp++) 1114 if (pm & (0x80 >> chp)) { 1115 dasd_path_operational(device, chp); 1116 /* 1117 * if the path is used 1118 * it should not be in one of the negative lists 1119 */ 1120 dasd_path_clear_nohpf(device, chp); 1121 dasd_path_clear_cuir(device, chp); 1122 dasd_path_clear_cable(device, chp); 1123 dasd_path_clear_ifcc(device, chp); 1124 } 1125 } 1126 1127 static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm) 1128 { 1129 int chp; 1130 1131 for (chp = 0; chp < 8; chp++) 1132 if (pm & (0x80 >> chp)) 1133 dasd_path_miscabled(device, chp); 1134 } 1135 1136 static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm) 1137 { 1138 int chp; 1139 1140 for (chp = 0; chp < 8; chp++) 1141 if (pm & (0x80 >> chp)) 1142 dasd_path_cuir(device, chp); 1143 } 1144 1145 static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm) 1146 { 1147 int chp; 1148 1149 for (chp = 0; chp < 8; chp++) 1150 if (pm & (0x80 >> chp)) 1151 dasd_path_ifcc(device, chp); 1152 } 1153 1154 static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm) 1155 { 1156 int chp; 1157 1158 for (chp = 0; chp < 8; chp++) 1159 if (pm & (0x80 >> chp)) 1160 dasd_path_nonpreferred(device, chp); 1161 } 1162 1163 static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm) 1164 { 1165 int chp; 1166 1167 for (chp = 0; chp < 8; chp++) 1168 if (pm & (0x80 >> chp)) 1169 dasd_path_nohpf(device, chp); 1170 } 1171 1172 static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm) 1173 { 1174 int chp; 1175 1176 for (chp = 0; chp < 8; chp++) 1177 if (pm & (0x80 >> chp)) 1178 dasd_path_preferred(device, chp); 1179 } 1180 1181 /* 1182 * set functions for path masks 1183 * the existing path mask will be replaced by the given path mask 1184 */ 1185 static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm) 1186 { 1187 int chp; 1188 1189 for (chp = 0; chp < 8; chp++) 1190 if (pm & (0x80 >> chp)) 1191 dasd_path_verify(device, chp); 1192 else 1193 dasd_path_clear_verify(device, chp); 1194 } 1195 1196 static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm) 1197 { 1198 int chp; 1199 1200 for (chp = 0; chp < 8; chp++) { 1201 dasd_path_clear_oper(device, chp); 1202 if (pm & (0x80 >> chp)) { 1203 dasd_path_operational(device, chp); 1204 /* 1205 * if the path is used 1206 * it should not be in one of the negative lists 1207 */ 1208 dasd_path_clear_nohpf(device, chp); 1209 dasd_path_clear_cuir(device, chp); 1210 dasd_path_clear_cable(device, chp); 1211 dasd_path_clear_ifcc(device, chp); 1212 } 1213 } 1214 } 1215 1216 /* 1217 * remove functions for path masks 1218 * the existing path mask will be cleared with the given path mask 1219 */ 1220 static inline void dasd_path_remove_opm(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_clear_oper(device, chp); 1227 } 1228 } 1229 1230 /* 1231 * add the newly available path to the to be verified pm and remove it from 1232 * normal operation until it is verified 1233 */ 1234 static inline void dasd_path_available(struct dasd_device *device, int chp) 1235 { 1236 dasd_path_clear_oper(device, chp); 1237 dasd_path_verify(device, chp); 1238 } 1239 1240 static inline void dasd_path_notoper(struct dasd_device *device, int chp) 1241 { 1242 dasd_path_clear_oper(device, chp); 1243 dasd_path_clear_preferred(device, chp); 1244 dasd_path_clear_nonpreferred(device, chp); 1245 } 1246 1247 /* 1248 * remove all paths from normal operation 1249 */ 1250 static inline void dasd_path_no_path(struct dasd_device *device) 1251 { 1252 int chp; 1253 1254 for (chp = 0; chp < 8; chp++) 1255 dasd_path_notoper(device, chp); 1256 1257 dasd_path_clear_all_verify(device); 1258 } 1259 1260 /* end - path handling */ 1261 1262 #endif /* DASD_H */ 1263