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 unsigned int proc_bytes; /* bytes for partial completion */ 191 }; 192 193 /* 194 * dasd_ccw_req -> status can be: 195 */ 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 */ 208 #define DASD_CQR_SUCCESS 0x85 /* request was successful */ 209 210 /* default expiration time*/ 211 #define DASD_EXPIRES 300 212 #define DASD_EXPIRES_MAX 40000000 213 #define DASD_RETRIES 256 214 #define DASD_RETRIES_MAX 32768 215 216 /* per dasd_ccw_req flags */ 217 #define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */ 218 #define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */ 219 #define DASD_CQR_VERIFY_PATH 2 /* path verification request */ 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 */ 224 /* 225 * The following flags are used to suppress output of certain errors. 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 */ 230 #define DASD_CQR_SUPPRESS_CR 7 /* Suppress 'Command Reject' error */ 231 232 #define DASD_REQ_PER_DEV 4 233 234 /* Signature for error recovery functions. */ 235 typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *); 236 237 /* 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 255 243 244 /* 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 251 252 struct 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 }; 261 262 /* 263 * the struct dasd_discipline is 264 * sth like a table of virtual functions, if you think of dasd_eckd 265 * inheriting dasd... 266 * no, currently we are not planning to reimplement the driver in C++ 267 */ 268 struct dasd_discipline { 269 struct module *owner; 270 char ebcname[8]; /* a name used for tagging and printks */ 271 char name[8]; /* a name used for tagging and printks */ 272 273 struct list_head list; /* used for list of disciplines */ 274 275 /* 276 * Device recognition functions. check_device is used to verify 277 * the sense data and the information returned by read device 278 * characteristics. It returns 0 if the discipline can be used 279 * for the device in question. uncheck_device is called during 280 * device shutdown to deregister a device from its discipline. 281 */ 282 int (*check_device) (struct dasd_device *); 283 void (*uncheck_device) (struct dasd_device *); 284 285 /* 286 * do_analysis is used in the step from device state "basic" to 287 * state "accept". It returns 0 if the device can be made ready, 288 * it returns -EMEDIUMTYPE if the device can't be made ready or 289 * -EAGAIN if do_analysis started a ccw that needs to complete 290 * before the analysis may be repeated. 291 */ 292 int (*do_analysis) (struct dasd_block *); 293 294 /* 295 * This function is called, when new paths become available. 296 * Disciplins may use this callback to do necessary setup work, 297 * e.g. verify that new path is compatible with the current 298 * configuration. 299 */ 300 int (*verify_path)(struct dasd_device *, __u8); 301 302 /* 303 * Last things to do when a device is set online, and first things 304 * when it is set offline. 305 */ 306 int (*basic_to_ready) (struct dasd_device *); 307 int (*online_to_ready) (struct dasd_device *); 308 int (*basic_to_known)(struct dasd_device *); 309 310 /* 311 * Initialize block layer request queue. 312 */ 313 void (*setup_blk_queue)(struct dasd_block *); 314 /* (struct dasd_device *); 315 * Device operation functions. build_cp creates a ccw chain for 316 * a block device request, start_io starts the request and 317 * term_IO cancels it (e.g. in case of a timeout). format_device 318 * formats the device and check_device_format compares the format of 319 * a device with the expected format_data. 320 * handle_terminated_request allows to examine a cqr and prepare 321 * it for retry. 322 */ 323 struct dasd_ccw_req *(*build_cp) (struct dasd_device *, 324 struct dasd_block *, 325 struct request *); 326 int (*start_IO) (struct dasd_ccw_req *); 327 int (*term_IO) (struct dasd_ccw_req *); 328 void (*handle_terminated_request) (struct dasd_ccw_req *); 329 int (*format_device) (struct dasd_device *, 330 struct format_data_t *, int); 331 int (*check_device_format)(struct dasd_device *, 332 struct format_check_t *, int); 333 int (*free_cp) (struct dasd_ccw_req *, struct request *); 334 335 /* 336 * Error recovery functions. examine_error() returns a value that 337 * indicates what to do for an error condition. If examine_error() 338 * returns 'dasd_era_recover' erp_action() is called to create a 339 * special error recovery ccw. erp_postaction() is called after 340 * an error recovery ccw has finished its execution. dump_sense 341 * is called for every error condition to print the sense data 342 * to the console. 343 */ 344 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); 345 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); 346 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, 347 struct irb *); 348 void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *); 349 void (*check_for_device_change) (struct dasd_device *, 350 struct dasd_ccw_req *, 351 struct irb *); 352 353 /* i/o control functions. */ 354 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *); 355 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); 356 int (*ioctl) (struct dasd_block *, unsigned int, void __user *); 357 358 /* reload device after state change */ 359 int (*reload) (struct dasd_device *); 360 361 int (*get_uid) (struct dasd_device *, struct dasd_uid *); 362 void (*kick_validate) (struct dasd_device *); 363 int (*check_attention)(struct dasd_device *, __u8); 364 int (*host_access_count)(struct dasd_device *); 365 int (*hosts_print)(struct dasd_device *, struct seq_file *); 366 void (*handle_hpf_error)(struct dasd_device *, struct irb *); 367 void (*disable_hpf)(struct dasd_device *); 368 int (*hpf_enabled)(struct dasd_device *); 369 void (*reset_path)(struct dasd_device *, __u8); 370 371 /* 372 * Extent Space Efficient (ESE) relevant functions 373 */ 374 int (*is_ese)(struct dasd_device *); 375 /* Capacity */ 376 int (*space_allocated)(struct dasd_device *); 377 int (*space_configured)(struct dasd_device *); 378 int (*logical_capacity)(struct dasd_device *); 379 int (*release_space)(struct dasd_device *, struct format_data_t *); 380 /* Extent Pool */ 381 int (*ext_pool_id)(struct dasd_device *); 382 int (*ext_size)(struct dasd_device *); 383 int (*ext_pool_cap_at_warnlevel)(struct dasd_device *); 384 int (*ext_pool_warn_thrshld)(struct dasd_device *); 385 int (*ext_pool_oos)(struct dasd_device *); 386 int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *); 387 struct dasd_ccw_req *(*ese_format)(struct dasd_device *, 388 struct dasd_ccw_req *, struct irb *); 389 int (*ese_read)(struct dasd_ccw_req *, struct irb *); 390 }; 391 392 extern struct dasd_discipline *dasd_diag_discipline_pointer; 393 394 /* 395 * Notification numbers for extended error reporting notifications: 396 * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's 397 * eer pointer) is freed. The error reporting module needs to do all necessary 398 * cleanup steps. 399 * The DASD_EER_TRIGGER notification sends the actual error reports (triggers). 400 */ 401 #define DASD_EER_DISABLE 0 402 #define DASD_EER_TRIGGER 1 403 404 /* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */ 405 #define DASD_EER_FATALERROR 1 406 #define DASD_EER_NOPATH 2 407 #define DASD_EER_STATECHANGE 3 408 #define DASD_EER_PPRCSUSPEND 4 409 #define DASD_EER_NOSPC 5 410 411 /* DASD path handling */ 412 413 #define DASD_PATH_OPERATIONAL 1 414 #define DASD_PATH_TBV 2 415 #define DASD_PATH_PP 3 416 #define DASD_PATH_NPP 4 417 #define DASD_PATH_MISCABLED 5 418 #define DASD_PATH_NOHPF 6 419 #define DASD_PATH_CUIR 7 420 #define DASD_PATH_IFCC 8 421 422 #define DASD_THRHLD_MAX 4294967295U 423 #define DASD_INTERVAL_MAX 4294967295U 424 425 struct dasd_path { 426 unsigned long flags; 427 u8 cssid; 428 u8 ssid; 429 u8 chpid; 430 struct dasd_conf_data *conf_data; 431 atomic_t error_count; 432 unsigned long errorclk; 433 }; 434 435 436 struct dasd_profile_info { 437 /* legacy part of profile data, as in dasd_profile_info_t */ 438 unsigned int dasd_io_reqs; /* number of requests processed */ 439 unsigned int dasd_io_sects; /* number of sectors processed */ 440 unsigned int dasd_io_secs[32]; /* histogram of request's sizes */ 441 unsigned int dasd_io_times[32]; /* histogram of requests's times */ 442 unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */ 443 unsigned int dasd_io_time1[32]; /* hist. of time from build to start */ 444 unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */ 445 unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */ 446 unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */ 447 unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */ 448 449 /* new data */ 450 struct timespec64 starttod; /* time of start or last reset */ 451 unsigned int dasd_io_alias; /* requests using an alias */ 452 unsigned int dasd_io_tpm; /* requests using transport mode */ 453 unsigned int dasd_read_reqs; /* total number of read requests */ 454 unsigned int dasd_read_sects; /* total number read sectors */ 455 unsigned int dasd_read_alias; /* read request using an alias */ 456 unsigned int dasd_read_tpm; /* read requests in transport mode */ 457 unsigned int dasd_read_secs[32]; /* histogram of request's sizes */ 458 unsigned int dasd_read_times[32]; /* histogram of requests's times */ 459 unsigned int dasd_read_time1[32]; /* hist. time from build to start */ 460 unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */ 461 unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */ 462 unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */ 463 unsigned long dasd_sum_times; /* sum of request times */ 464 unsigned long dasd_sum_time_str; /* sum of time from build to start */ 465 unsigned long dasd_sum_time_irq; /* sum of time from start to irq */ 466 unsigned long dasd_sum_time_end; /* sum of time from irq to end */ 467 }; 468 469 struct dasd_profile { 470 struct dentry *dentry; 471 struct dasd_profile_info *data; 472 spinlock_t lock; 473 }; 474 475 struct dasd_format_entry { 476 struct list_head list; 477 sector_t track; 478 }; 479 480 struct dasd_device { 481 /* Block device stuff. */ 482 struct dasd_block *block; 483 484 unsigned int devindex; 485 unsigned long flags; /* per device flags */ 486 unsigned short features; /* copy of devmap-features (read-only!) */ 487 488 /* extended error reporting stuff (eer) */ 489 struct dasd_ccw_req *eer_cqr; 490 491 /* Device discipline stuff. */ 492 struct dasd_discipline *discipline; 493 struct dasd_discipline *base_discipline; 494 void *private; 495 struct dasd_path path[8]; 496 __u8 opm; 497 498 /* Device state and target state. */ 499 int state, target; 500 struct mutex state_mutex; 501 int stopped; /* device (ccw_device_start) was stopped */ 502 503 /* reference count. */ 504 atomic_t ref_count; 505 506 /* ccw queue and memory for static ccw/erp buffers. */ 507 struct list_head ccw_queue; 508 spinlock_t mem_lock; 509 void *ccw_mem; 510 void *erp_mem; 511 void *ese_mem; 512 struct list_head ccw_chunks; 513 struct list_head erp_chunks; 514 struct list_head ese_chunks; 515 516 atomic_t tasklet_scheduled; 517 struct tasklet_struct tasklet; 518 struct work_struct kick_work; 519 struct work_struct reload_device; 520 struct work_struct kick_validate; 521 struct work_struct suc_work; 522 struct work_struct requeue_requests; 523 struct timer_list timer; 524 525 debug_info_t *debug_area; 526 527 struct ccw_device *cdev; 528 529 /* hook for alias management */ 530 struct list_head alias_list; 531 532 /* default expiration time in s */ 533 unsigned long default_expires; 534 unsigned long default_retries; 535 536 unsigned long blk_timeout; 537 538 unsigned long path_thrhld; 539 unsigned long path_interval; 540 541 struct dentry *debugfs_dentry; 542 struct dentry *hosts_dentry; 543 struct dasd_profile profile; 544 struct dasd_format_entry format_entry; 545 }; 546 547 struct dasd_block { 548 /* Block device stuff. */ 549 struct gendisk *gdp; 550 struct request_queue *request_queue; 551 spinlock_t request_queue_lock; 552 struct blk_mq_tag_set tag_set; 553 struct block_device *bdev; 554 atomic_t open_count; 555 556 unsigned long blocks; /* size of volume in blocks */ 557 unsigned int bp_block; /* bytes per block */ 558 unsigned int s2b_shift; /* log2 (bp_block/512) */ 559 560 struct dasd_device *base; 561 struct list_head ccw_queue; 562 spinlock_t queue_lock; 563 564 atomic_t tasklet_scheduled; 565 struct tasklet_struct tasklet; 566 struct timer_list timer; 567 568 struct dentry *debugfs_dentry; 569 struct dasd_profile profile; 570 571 struct list_head format_list; 572 spinlock_t format_lock; 573 }; 574 575 struct dasd_attention_data { 576 struct dasd_device *device; 577 __u8 lpum; 578 }; 579 580 struct dasd_queue { 581 spinlock_t lock; 582 }; 583 584 /* reasons why device (ccw_device_start) was stopped */ 585 #define DASD_STOPPED_NOT_ACC 1 /* not accessible */ 586 #define DASD_STOPPED_QUIESCE 2 /* Quiesced */ 587 #define DASD_STOPPED_PENDING 4 /* long busy */ 588 #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ 589 #define DASD_STOPPED_SU 16 /* summary unit check handling */ 590 #define DASD_STOPPED_NOSPC 128 /* no space left */ 591 592 /* per device flags */ 593 #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ 594 #define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ 595 #define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ 596 #define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't 597 * confuse this with the user specified 598 * read-only feature. 599 */ 600 #define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */ 601 #define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */ 602 #define DASD_FLAG_SUSPENDED 9 /* The device was suspended */ 603 #define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/ 604 #define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */ 605 #define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */ 606 #define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */ 607 #define DASD_FLAG_SUC 14 /* unhandled summary unit check */ 608 609 #define DASD_SLEEPON_START_TAG ((void *) 1) 610 #define DASD_SLEEPON_END_TAG ((void *) 2) 611 612 void dasd_put_device_wake(struct dasd_device *); 613 614 /* 615 * Reference count inliners 616 */ 617 static inline void 618 dasd_get_device(struct dasd_device *device) 619 { 620 atomic_inc(&device->ref_count); 621 } 622 623 static inline void 624 dasd_put_device(struct dasd_device *device) 625 { 626 if (atomic_dec_return(&device->ref_count) == 0) 627 dasd_put_device_wake(device); 628 } 629 630 /* 631 * The static memory in ccw_mem and erp_mem is managed by a sorted 632 * list of free memory chunks. 633 */ 634 struct dasd_mchunk 635 { 636 struct list_head list; 637 unsigned long size; 638 } __attribute__ ((aligned(8))); 639 640 static inline void 641 dasd_init_chunklist(struct list_head *chunk_list, void *mem, 642 unsigned long size) 643 { 644 struct dasd_mchunk *chunk; 645 646 INIT_LIST_HEAD(chunk_list); 647 chunk = (struct dasd_mchunk *) mem; 648 chunk->size = size - sizeof(struct dasd_mchunk); 649 list_add(&chunk->list, chunk_list); 650 } 651 652 static inline void * 653 dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size) 654 { 655 struct dasd_mchunk *chunk, *tmp; 656 657 size = (size + 7L) & -8L; 658 list_for_each_entry(chunk, chunk_list, list) { 659 if (chunk->size < size) 660 continue; 661 if (chunk->size > size + sizeof(struct dasd_mchunk)) { 662 char *endaddr = (char *) (chunk + 1) + chunk->size; 663 tmp = (struct dasd_mchunk *) (endaddr - size) - 1; 664 tmp->size = size; 665 chunk->size -= size + sizeof(struct dasd_mchunk); 666 chunk = tmp; 667 } else 668 list_del(&chunk->list); 669 return (void *) (chunk + 1); 670 } 671 return NULL; 672 } 673 674 static inline void 675 dasd_free_chunk(struct list_head *chunk_list, void *mem) 676 { 677 struct dasd_mchunk *chunk, *tmp; 678 struct list_head *p, *left; 679 680 chunk = (struct dasd_mchunk *) 681 ((char *) mem - sizeof(struct dasd_mchunk)); 682 /* Find out the left neighbour in chunk_list. */ 683 left = chunk_list; 684 list_for_each(p, chunk_list) { 685 if (list_entry(p, struct dasd_mchunk, list) > chunk) 686 break; 687 left = p; 688 } 689 /* Try to merge with right neighbour = next element from left. */ 690 if (left->next != chunk_list) { 691 tmp = list_entry(left->next, struct dasd_mchunk, list); 692 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) { 693 list_del(&tmp->list); 694 chunk->size += tmp->size + sizeof(struct dasd_mchunk); 695 } 696 } 697 /* Try to merge with left neighbour. */ 698 if (left != chunk_list) { 699 tmp = list_entry(left, struct dasd_mchunk, list); 700 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) { 701 tmp->size += chunk->size + sizeof(struct dasd_mchunk); 702 return; 703 } 704 } 705 __list_add(&chunk->list, left, left->next); 706 } 707 708 /* 709 * Check if bsize is in { 512, 1024, 2048, 4096 } 710 */ 711 static inline int 712 dasd_check_blocksize(int bsize) 713 { 714 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize)) 715 return -EMEDIUMTYPE; 716 return 0; 717 } 718 719 /* externals in dasd.c */ 720 #define DASD_PROFILE_OFF 0 721 #define DASD_PROFILE_ON 1 722 #define DASD_PROFILE_GLOBAL_ONLY 2 723 724 extern debug_info_t *dasd_debug_area; 725 extern struct dasd_profile dasd_global_profile; 726 extern unsigned int dasd_global_profile_level; 727 extern const struct block_device_operations dasd_device_operations; 728 729 extern struct kmem_cache *dasd_page_cache; 730 731 struct dasd_ccw_req * 732 dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *); 733 struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *); 734 void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); 735 void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *); 736 void dasd_wakeup_cb(struct dasd_ccw_req *, void *); 737 738 struct dasd_device *dasd_alloc_device(void); 739 void dasd_free_device(struct dasd_device *); 740 741 struct dasd_block *dasd_alloc_block(void); 742 void dasd_free_block(struct dasd_block *); 743 744 enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved); 745 746 void dasd_enable_device(struct dasd_device *); 747 void dasd_set_target_state(struct dasd_device *, int); 748 void dasd_kick_device(struct dasd_device *); 749 void dasd_reload_device(struct dasd_device *); 750 void dasd_schedule_requeue(struct dasd_device *); 751 752 void dasd_add_request_head(struct dasd_ccw_req *); 753 void dasd_add_request_tail(struct dasd_ccw_req *); 754 int dasd_start_IO(struct dasd_ccw_req *); 755 int dasd_term_IO(struct dasd_ccw_req *); 756 void dasd_schedule_device_bh(struct dasd_device *); 757 void dasd_schedule_block_bh(struct dasd_block *); 758 int dasd_sleep_on(struct dasd_ccw_req *); 759 int dasd_sleep_on_queue(struct list_head *); 760 int dasd_sleep_on_immediatly(struct dasd_ccw_req *); 761 int dasd_sleep_on_queue_interruptible(struct list_head *); 762 int dasd_sleep_on_interruptible(struct dasd_ccw_req *); 763 void dasd_device_set_timer(struct dasd_device *, int); 764 void dasd_device_clear_timer(struct dasd_device *); 765 void dasd_block_set_timer(struct dasd_block *, int); 766 void dasd_block_clear_timer(struct dasd_block *); 767 int dasd_cancel_req(struct dasd_ccw_req *); 768 int dasd_flush_device_queue(struct dasd_device *); 769 int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *); 770 void dasd_generic_free_discipline(struct dasd_device *); 771 void dasd_generic_remove (struct ccw_device *cdev); 772 int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); 773 int dasd_generic_set_offline (struct ccw_device *cdev); 774 int dasd_generic_notify(struct ccw_device *, int); 775 int dasd_generic_last_path_gone(struct dasd_device *); 776 int dasd_generic_path_operational(struct dasd_device *); 777 void dasd_generic_shutdown(struct ccw_device *); 778 779 void dasd_generic_handle_state_change(struct dasd_device *); 780 enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *); 781 void dasd_generic_path_event(struct ccw_device *, int *); 782 int dasd_generic_verify_path(struct dasd_device *, __u8); 783 void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *); 784 void dasd_generic_space_avail(struct dasd_device *); 785 786 int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); 787 char *dasd_get_sense(struct irb *); 788 789 void dasd_device_set_stop_bits(struct dasd_device *, int); 790 void dasd_device_remove_stop_bits(struct dasd_device *, int); 791 792 int dasd_device_is_ro(struct dasd_device *); 793 794 void dasd_profile_reset(struct dasd_profile *); 795 int dasd_profile_on(struct dasd_profile *); 796 void dasd_profile_off(struct dasd_profile *); 797 char *dasd_get_user_string(const char __user *, size_t); 798 799 /* externals in dasd_devmap.c */ 800 extern int dasd_max_devindex; 801 extern int dasd_probeonly; 802 extern int dasd_autodetect; 803 extern int dasd_nopav; 804 extern int dasd_nofcx; 805 806 int dasd_devmap_init(void); 807 void dasd_devmap_exit(void); 808 809 struct dasd_device *dasd_create_device(struct ccw_device *); 810 void dasd_delete_device(struct dasd_device *); 811 812 int dasd_get_feature(struct ccw_device *, int); 813 int dasd_set_feature(struct ccw_device *, int, int); 814 815 int dasd_add_sysfs_files(struct ccw_device *); 816 void dasd_remove_sysfs_files(struct ccw_device *); 817 818 struct dasd_device *dasd_device_from_cdev(struct ccw_device *); 819 struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *); 820 struct dasd_device *dasd_device_from_devindex(int); 821 822 void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *); 823 struct dasd_device *dasd_device_from_gendisk(struct gendisk *); 824 825 int dasd_parse(void) __init; 826 int dasd_busid_known(const char *); 827 828 /* externals in dasd_gendisk.c */ 829 int dasd_gendisk_init(void); 830 void dasd_gendisk_exit(void); 831 int dasd_gendisk_alloc(struct dasd_block *); 832 void dasd_gendisk_free(struct dasd_block *); 833 int dasd_scan_partitions(struct dasd_block *); 834 void dasd_destroy_partitions(struct dasd_block *); 835 836 /* externals in dasd_ioctl.c */ 837 int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long); 838 839 /* externals in dasd_proc.c */ 840 int dasd_proc_init(void); 841 void dasd_proc_exit(void); 842 843 /* externals in dasd_erp.c */ 844 struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); 845 struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); 846 struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int, 847 struct dasd_device *); 848 void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); 849 void dasd_log_sense(struct dasd_ccw_req *, struct irb *); 850 void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb); 851 852 /* externals in dasd_3990_erp.c */ 853 struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); 854 void dasd_3990_erp_handle_sim(struct dasd_device *, char *); 855 856 /* externals in dasd_eer.c */ 857 #ifdef CONFIG_DASD_EER 858 int dasd_eer_init(void); 859 void dasd_eer_exit(void); 860 int dasd_eer_enable(struct dasd_device *); 861 void dasd_eer_disable(struct dasd_device *); 862 void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, 863 unsigned int id); 864 void dasd_eer_snss(struct dasd_device *); 865 866 static inline int dasd_eer_enabled(struct dasd_device *device) 867 { 868 return device->eer_cqr != NULL; 869 } 870 #else 871 #define dasd_eer_init() (0) 872 #define dasd_eer_exit() do { } while (0) 873 #define dasd_eer_enable(d) (0) 874 #define dasd_eer_disable(d) do { } while (0) 875 #define dasd_eer_write(d,c,i) do { } while (0) 876 #define dasd_eer_snss(d) do { } while (0) 877 #define dasd_eer_enabled(d) (0) 878 #endif /* CONFIG_DASD_ERR */ 879 880 881 /* DASD path handling functions */ 882 883 /* 884 * helper functions to modify bit masks for a given channel path for a device 885 */ 886 static inline int dasd_path_is_operational(struct dasd_device *device, int chp) 887 { 888 return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 889 } 890 891 static inline int dasd_path_need_verify(struct dasd_device *device, int chp) 892 { 893 return test_bit(DASD_PATH_TBV, &device->path[chp].flags); 894 } 895 896 static inline void dasd_path_verify(struct dasd_device *device, int chp) 897 { 898 __set_bit(DASD_PATH_TBV, &device->path[chp].flags); 899 } 900 901 static inline void dasd_path_clear_verify(struct dasd_device *device, int chp) 902 { 903 __clear_bit(DASD_PATH_TBV, &device->path[chp].flags); 904 } 905 906 static inline void dasd_path_clear_all_verify(struct dasd_device *device) 907 { 908 int chp; 909 910 for (chp = 0; chp < 8; chp++) 911 dasd_path_clear_verify(device, chp); 912 } 913 914 static inline void dasd_path_operational(struct dasd_device *device, int chp) 915 { 916 __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 917 device->opm |= (0x80 >> chp); 918 } 919 920 static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp) 921 { 922 __set_bit(DASD_PATH_NPP, &device->path[chp].flags); 923 } 924 925 static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp) 926 { 927 return test_bit(DASD_PATH_NPP, &device->path[chp].flags); 928 } 929 930 static inline void dasd_path_clear_nonpreferred(struct dasd_device *device, 931 int chp) 932 { 933 __clear_bit(DASD_PATH_NPP, &device->path[chp].flags); 934 } 935 936 static inline void dasd_path_preferred(struct dasd_device *device, int chp) 937 { 938 __set_bit(DASD_PATH_PP, &device->path[chp].flags); 939 } 940 941 static inline int dasd_path_is_preferred(struct dasd_device *device, int chp) 942 { 943 return test_bit(DASD_PATH_PP, &device->path[chp].flags); 944 } 945 946 static inline void dasd_path_clear_preferred(struct dasd_device *device, 947 int chp) 948 { 949 __clear_bit(DASD_PATH_PP, &device->path[chp].flags); 950 } 951 952 static inline void dasd_path_clear_oper(struct dasd_device *device, int chp) 953 { 954 __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 955 device->opm &= ~(0x80 >> chp); 956 } 957 958 static inline void dasd_path_clear_cable(struct dasd_device *device, int chp) 959 { 960 __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 961 } 962 963 static inline void dasd_path_cuir(struct dasd_device *device, int chp) 964 { 965 __set_bit(DASD_PATH_CUIR, &device->path[chp].flags); 966 } 967 968 static inline int dasd_path_is_cuir(struct dasd_device *device, int chp) 969 { 970 return test_bit(DASD_PATH_CUIR, &device->path[chp].flags); 971 } 972 973 static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp) 974 { 975 __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags); 976 } 977 978 static inline void dasd_path_ifcc(struct dasd_device *device, int chp) 979 { 980 set_bit(DASD_PATH_IFCC, &device->path[chp].flags); 981 } 982 983 static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp) 984 { 985 return test_bit(DASD_PATH_IFCC, &device->path[chp].flags); 986 } 987 988 static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp) 989 { 990 clear_bit(DASD_PATH_IFCC, &device->path[chp].flags); 991 } 992 993 static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp) 994 { 995 __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 996 } 997 998 static inline void dasd_path_miscabled(struct dasd_device *device, int chp) 999 { 1000 __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1001 } 1002 1003 static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp) 1004 { 1005 return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1006 } 1007 1008 static inline void dasd_path_nohpf(struct dasd_device *device, int chp) 1009 { 1010 __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1011 } 1012 1013 static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp) 1014 { 1015 return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1016 } 1017 1018 /* 1019 * get functions for path masks 1020 * will return a path masks for the given device 1021 */ 1022 1023 static inline __u8 dasd_path_get_opm(struct dasd_device *device) 1024 { 1025 return device->opm; 1026 } 1027 1028 static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device) 1029 { 1030 int chp; 1031 __u8 tbvpm = 0x00; 1032 1033 for (chp = 0; chp < 8; chp++) 1034 if (dasd_path_need_verify(device, chp)) 1035 tbvpm |= 0x80 >> chp; 1036 return tbvpm; 1037 } 1038 1039 static inline __u8 dasd_path_get_nppm(struct dasd_device *device) 1040 { 1041 int chp; 1042 __u8 npm = 0x00; 1043 1044 for (chp = 0; chp < 8; chp++) { 1045 if (dasd_path_is_nonpreferred(device, chp)) 1046 npm |= 0x80 >> chp; 1047 } 1048 return npm; 1049 } 1050 1051 static inline __u8 dasd_path_get_ppm(struct dasd_device *device) 1052 { 1053 int chp; 1054 __u8 ppm = 0x00; 1055 1056 for (chp = 0; chp < 8; chp++) 1057 if (dasd_path_is_preferred(device, chp)) 1058 ppm |= 0x80 >> chp; 1059 return ppm; 1060 } 1061 1062 static inline __u8 dasd_path_get_cablepm(struct dasd_device *device) 1063 { 1064 int chp; 1065 __u8 cablepm = 0x00; 1066 1067 for (chp = 0; chp < 8; chp++) 1068 if (dasd_path_is_miscabled(device, chp)) 1069 cablepm |= 0x80 >> chp; 1070 return cablepm; 1071 } 1072 1073 static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device) 1074 { 1075 int chp; 1076 __u8 cuirpm = 0x00; 1077 1078 for (chp = 0; chp < 8; chp++) 1079 if (dasd_path_is_cuir(device, chp)) 1080 cuirpm |= 0x80 >> chp; 1081 return cuirpm; 1082 } 1083 1084 static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device) 1085 { 1086 int chp; 1087 __u8 ifccpm = 0x00; 1088 1089 for (chp = 0; chp < 8; chp++) 1090 if (dasd_path_is_ifcc(device, chp)) 1091 ifccpm |= 0x80 >> chp; 1092 return ifccpm; 1093 } 1094 1095 static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device) 1096 { 1097 int chp; 1098 __u8 hpfpm = 0x00; 1099 1100 for (chp = 0; chp < 8; chp++) 1101 if (dasd_path_is_nohpf(device, chp)) 1102 hpfpm |= 0x80 >> chp; 1103 return hpfpm; 1104 } 1105 1106 /* 1107 * add functions for path masks 1108 * the existing path mask will be extended by the given path mask 1109 */ 1110 static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm) 1111 { 1112 int chp; 1113 1114 for (chp = 0; chp < 8; chp++) 1115 if (pm & (0x80 >> chp)) 1116 dasd_path_verify(device, chp); 1117 } 1118 1119 static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device) 1120 { 1121 int chp; 1122 __u8 nopm = 0x00; 1123 1124 for (chp = 0; chp < 8; chp++) 1125 if (dasd_path_is_nohpf(device, chp) || 1126 dasd_path_is_ifcc(device, chp) || 1127 dasd_path_is_cuir(device, chp) || 1128 dasd_path_is_miscabled(device, chp)) 1129 nopm |= 0x80 >> chp; 1130 return nopm; 1131 } 1132 1133 static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm) 1134 { 1135 int chp; 1136 1137 for (chp = 0; chp < 8; chp++) 1138 if (pm & (0x80 >> chp)) { 1139 dasd_path_operational(device, chp); 1140 /* 1141 * if the path is used 1142 * it should not be in one of the negative lists 1143 */ 1144 dasd_path_clear_nohpf(device, chp); 1145 dasd_path_clear_cuir(device, chp); 1146 dasd_path_clear_cable(device, chp); 1147 dasd_path_clear_ifcc(device, chp); 1148 } 1149 } 1150 1151 static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm) 1152 { 1153 int chp; 1154 1155 for (chp = 0; chp < 8; chp++) 1156 if (pm & (0x80 >> chp)) 1157 dasd_path_miscabled(device, chp); 1158 } 1159 1160 static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm) 1161 { 1162 int chp; 1163 1164 for (chp = 0; chp < 8; chp++) 1165 if (pm & (0x80 >> chp)) 1166 dasd_path_cuir(device, chp); 1167 } 1168 1169 static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm) 1170 { 1171 int chp; 1172 1173 for (chp = 0; chp < 8; chp++) 1174 if (pm & (0x80 >> chp)) 1175 dasd_path_ifcc(device, chp); 1176 } 1177 1178 static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm) 1179 { 1180 int chp; 1181 1182 for (chp = 0; chp < 8; chp++) 1183 if (pm & (0x80 >> chp)) 1184 dasd_path_nonpreferred(device, chp); 1185 } 1186 1187 static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm) 1188 { 1189 int chp; 1190 1191 for (chp = 0; chp < 8; chp++) 1192 if (pm & (0x80 >> chp)) 1193 dasd_path_nohpf(device, chp); 1194 } 1195 1196 static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm) 1197 { 1198 int chp; 1199 1200 for (chp = 0; chp < 8; chp++) 1201 if (pm & (0x80 >> chp)) 1202 dasd_path_preferred(device, chp); 1203 } 1204 1205 /* 1206 * set functions for path masks 1207 * the existing path mask will be replaced by the given path mask 1208 */ 1209 static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm) 1210 { 1211 int chp; 1212 1213 for (chp = 0; chp < 8; chp++) 1214 if (pm & (0x80 >> chp)) 1215 dasd_path_verify(device, chp); 1216 else 1217 dasd_path_clear_verify(device, chp); 1218 } 1219 1220 static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm) 1221 { 1222 int chp; 1223 1224 for (chp = 0; chp < 8; chp++) { 1225 dasd_path_clear_oper(device, chp); 1226 if (pm & (0x80 >> chp)) { 1227 dasd_path_operational(device, chp); 1228 /* 1229 * if the path is used 1230 * it should not be in one of the negative lists 1231 */ 1232 dasd_path_clear_nohpf(device, chp); 1233 dasd_path_clear_cuir(device, chp); 1234 dasd_path_clear_cable(device, chp); 1235 dasd_path_clear_ifcc(device, chp); 1236 } 1237 } 1238 } 1239 1240 /* 1241 * remove functions for path masks 1242 * the existing path mask will be cleared with the given path mask 1243 */ 1244 static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm) 1245 { 1246 int chp; 1247 1248 for (chp = 0; chp < 8; chp++) { 1249 if (pm & (0x80 >> chp)) 1250 dasd_path_clear_oper(device, chp); 1251 } 1252 } 1253 1254 /* 1255 * add the newly available path to the to be verified pm and remove it from 1256 * normal operation until it is verified 1257 */ 1258 static inline void dasd_path_available(struct dasd_device *device, int chp) 1259 { 1260 dasd_path_clear_oper(device, chp); 1261 dasd_path_verify(device, chp); 1262 } 1263 1264 static inline void dasd_path_notoper(struct dasd_device *device, int chp) 1265 { 1266 dasd_path_clear_oper(device, chp); 1267 dasd_path_clear_preferred(device, chp); 1268 dasd_path_clear_nonpreferred(device, chp); 1269 } 1270 1271 /* 1272 * remove all paths from normal operation 1273 */ 1274 static inline void dasd_path_no_path(struct dasd_device *device) 1275 { 1276 int chp; 1277 1278 for (chp = 0; chp < 8; chp++) 1279 dasd_path_notoper(device, chp); 1280 1281 dasd_path_clear_all_verify(device); 1282 } 1283 1284 /* end - path handling */ 1285 1286 #endif /* DASD_H */ 1287