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 /* suspend/resume functions */ 359 int (*freeze) (struct dasd_device *); 360 int (*restore) (struct dasd_device *); 361 362 /* reload device after state change */ 363 int (*reload) (struct dasd_device *); 364 365 int (*get_uid) (struct dasd_device *, struct dasd_uid *); 366 void (*kick_validate) (struct dasd_device *); 367 int (*check_attention)(struct dasd_device *, __u8); 368 int (*host_access_count)(struct dasd_device *); 369 int (*hosts_print)(struct dasd_device *, struct seq_file *); 370 void (*handle_hpf_error)(struct dasd_device *, struct irb *); 371 void (*disable_hpf)(struct dasd_device *); 372 int (*hpf_enabled)(struct dasd_device *); 373 void (*reset_path)(struct dasd_device *, __u8); 374 375 /* 376 * Extent Space Efficient (ESE) relevant functions 377 */ 378 int (*is_ese)(struct dasd_device *); 379 /* Capacity */ 380 int (*space_allocated)(struct dasd_device *); 381 int (*space_configured)(struct dasd_device *); 382 int (*logical_capacity)(struct dasd_device *); 383 int (*release_space)(struct dasd_device *, struct format_data_t *); 384 /* Extent Pool */ 385 int (*ext_pool_id)(struct dasd_device *); 386 int (*ext_size)(struct dasd_device *); 387 int (*ext_pool_cap_at_warnlevel)(struct dasd_device *); 388 int (*ext_pool_warn_thrshld)(struct dasd_device *); 389 int (*ext_pool_oos)(struct dasd_device *); 390 int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *); 391 struct dasd_ccw_req *(*ese_format)(struct dasd_device *, 392 struct dasd_ccw_req *, struct irb *); 393 int (*ese_read)(struct dasd_ccw_req *, struct irb *); 394 }; 395 396 extern struct dasd_discipline *dasd_diag_discipline_pointer; 397 398 /* 399 * Notification numbers for extended error reporting notifications: 400 * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's 401 * eer pointer) is freed. The error reporting module needs to do all necessary 402 * cleanup steps. 403 * The DASD_EER_TRIGGER notification sends the actual error reports (triggers). 404 */ 405 #define DASD_EER_DISABLE 0 406 #define DASD_EER_TRIGGER 1 407 408 /* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */ 409 #define DASD_EER_FATALERROR 1 410 #define DASD_EER_NOPATH 2 411 #define DASD_EER_STATECHANGE 3 412 #define DASD_EER_PPRCSUSPEND 4 413 #define DASD_EER_NOSPC 5 414 415 /* DASD path handling */ 416 417 #define DASD_PATH_OPERATIONAL 1 418 #define DASD_PATH_TBV 2 419 #define DASD_PATH_PP 3 420 #define DASD_PATH_NPP 4 421 #define DASD_PATH_MISCABLED 5 422 #define DASD_PATH_NOHPF 6 423 #define DASD_PATH_CUIR 7 424 #define DASD_PATH_IFCC 8 425 426 #define DASD_THRHLD_MAX 4294967295U 427 #define DASD_INTERVAL_MAX 4294967295U 428 429 struct dasd_path { 430 unsigned long flags; 431 u8 cssid; 432 u8 ssid; 433 u8 chpid; 434 struct dasd_conf_data *conf_data; 435 atomic_t error_count; 436 unsigned long errorclk; 437 }; 438 439 440 struct dasd_profile_info { 441 /* legacy part of profile data, as in dasd_profile_info_t */ 442 unsigned int dasd_io_reqs; /* number of requests processed */ 443 unsigned int dasd_io_sects; /* number of sectors processed */ 444 unsigned int dasd_io_secs[32]; /* histogram of request's sizes */ 445 unsigned int dasd_io_times[32]; /* histogram of requests's times */ 446 unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */ 447 unsigned int dasd_io_time1[32]; /* hist. of time from build to start */ 448 unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */ 449 unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */ 450 unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */ 451 unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */ 452 453 /* new data */ 454 struct timespec64 starttod; /* time of start or last reset */ 455 unsigned int dasd_io_alias; /* requests using an alias */ 456 unsigned int dasd_io_tpm; /* requests using transport mode */ 457 unsigned int dasd_read_reqs; /* total number of read requests */ 458 unsigned int dasd_read_sects; /* total number read sectors */ 459 unsigned int dasd_read_alias; /* read request using an alias */ 460 unsigned int dasd_read_tpm; /* read requests in transport mode */ 461 unsigned int dasd_read_secs[32]; /* histogram of request's sizes */ 462 unsigned int dasd_read_times[32]; /* histogram of requests's times */ 463 unsigned int dasd_read_time1[32]; /* hist. time from build to start */ 464 unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */ 465 unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */ 466 unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */ 467 unsigned long dasd_sum_times; /* sum of request times */ 468 unsigned long dasd_sum_time_str; /* sum of time from build to start */ 469 unsigned long dasd_sum_time_irq; /* sum of time from start to irq */ 470 unsigned long dasd_sum_time_end; /* sum of time from irq to end */ 471 }; 472 473 struct dasd_profile { 474 struct dentry *dentry; 475 struct dasd_profile_info *data; 476 spinlock_t lock; 477 }; 478 479 struct dasd_format_entry { 480 struct list_head list; 481 sector_t track; 482 }; 483 484 struct dasd_device { 485 /* Block device stuff. */ 486 struct dasd_block *block; 487 488 unsigned int devindex; 489 unsigned long flags; /* per device flags */ 490 unsigned short features; /* copy of devmap-features (read-only!) */ 491 492 /* extended error reporting stuff (eer) */ 493 struct dasd_ccw_req *eer_cqr; 494 495 /* Device discipline stuff. */ 496 struct dasd_discipline *discipline; 497 struct dasd_discipline *base_discipline; 498 void *private; 499 struct dasd_path path[8]; 500 __u8 opm; 501 502 /* Device state and target state. */ 503 int state, target; 504 struct mutex state_mutex; 505 int stopped; /* device (ccw_device_start) was stopped */ 506 507 /* reference count. */ 508 atomic_t ref_count; 509 510 /* ccw queue and memory for static ccw/erp buffers. */ 511 struct list_head ccw_queue; 512 spinlock_t mem_lock; 513 void *ccw_mem; 514 void *erp_mem; 515 void *ese_mem; 516 struct list_head ccw_chunks; 517 struct list_head erp_chunks; 518 struct list_head ese_chunks; 519 520 atomic_t tasklet_scheduled; 521 struct tasklet_struct tasklet; 522 struct work_struct kick_work; 523 struct work_struct restore_device; 524 struct work_struct reload_device; 525 struct work_struct kick_validate; 526 struct work_struct suc_work; 527 struct work_struct requeue_requests; 528 struct timer_list timer; 529 530 debug_info_t *debug_area; 531 532 struct ccw_device *cdev; 533 534 /* hook for alias management */ 535 struct list_head alias_list; 536 537 /* default expiration time in s */ 538 unsigned long default_expires; 539 unsigned long default_retries; 540 541 unsigned long blk_timeout; 542 543 unsigned long path_thrhld; 544 unsigned long path_interval; 545 546 struct dentry *debugfs_dentry; 547 struct dentry *hosts_dentry; 548 struct dasd_profile profile; 549 struct dasd_format_entry format_entry; 550 }; 551 552 struct dasd_block { 553 /* Block device stuff. */ 554 struct gendisk *gdp; 555 struct request_queue *request_queue; 556 spinlock_t request_queue_lock; 557 struct blk_mq_tag_set tag_set; 558 struct block_device *bdev; 559 atomic_t open_count; 560 561 unsigned long blocks; /* size of volume in blocks */ 562 unsigned int bp_block; /* bytes per block */ 563 unsigned int s2b_shift; /* log2 (bp_block/512) */ 564 565 struct dasd_device *base; 566 struct list_head ccw_queue; 567 spinlock_t queue_lock; 568 569 atomic_t tasklet_scheduled; 570 struct tasklet_struct tasklet; 571 struct timer_list timer; 572 573 struct dentry *debugfs_dentry; 574 struct dasd_profile profile; 575 576 struct list_head format_list; 577 spinlock_t format_lock; 578 }; 579 580 struct dasd_attention_data { 581 struct dasd_device *device; 582 __u8 lpum; 583 }; 584 585 struct dasd_queue { 586 spinlock_t lock; 587 }; 588 589 /* reasons why device (ccw_device_start) was stopped */ 590 #define DASD_STOPPED_NOT_ACC 1 /* not accessible */ 591 #define DASD_STOPPED_QUIESCE 2 /* Quiesced */ 592 #define DASD_STOPPED_PENDING 4 /* long busy */ 593 #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ 594 #define DASD_STOPPED_SU 16 /* summary unit check handling */ 595 #define DASD_STOPPED_PM 32 /* pm state transition */ 596 #define DASD_UNRESUMED_PM 64 /* pm resume failed state */ 597 #define DASD_STOPPED_NOSPC 128 /* no space left */ 598 599 /* per device flags */ 600 #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ 601 #define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ 602 #define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ 603 #define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't 604 * confuse this with the user specified 605 * read-only feature. 606 */ 607 #define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */ 608 #define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */ 609 #define DASD_FLAG_SUSPENDED 9 /* The device was suspended */ 610 #define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/ 611 #define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */ 612 #define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */ 613 #define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */ 614 #define DASD_FLAG_SUC 14 /* unhandled summary unit check */ 615 616 #define DASD_SLEEPON_START_TAG ((void *) 1) 617 #define DASD_SLEEPON_END_TAG ((void *) 2) 618 619 void dasd_put_device_wake(struct dasd_device *); 620 621 /* 622 * Reference count inliners 623 */ 624 static inline void 625 dasd_get_device(struct dasd_device *device) 626 { 627 atomic_inc(&device->ref_count); 628 } 629 630 static inline void 631 dasd_put_device(struct dasd_device *device) 632 { 633 if (atomic_dec_return(&device->ref_count) == 0) 634 dasd_put_device_wake(device); 635 } 636 637 /* 638 * The static memory in ccw_mem and erp_mem is managed by a sorted 639 * list of free memory chunks. 640 */ 641 struct dasd_mchunk 642 { 643 struct list_head list; 644 unsigned long size; 645 } __attribute__ ((aligned(8))); 646 647 static inline void 648 dasd_init_chunklist(struct list_head *chunk_list, void *mem, 649 unsigned long size) 650 { 651 struct dasd_mchunk *chunk; 652 653 INIT_LIST_HEAD(chunk_list); 654 chunk = (struct dasd_mchunk *) mem; 655 chunk->size = size - sizeof(struct dasd_mchunk); 656 list_add(&chunk->list, chunk_list); 657 } 658 659 static inline void * 660 dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size) 661 { 662 struct dasd_mchunk *chunk, *tmp; 663 664 size = (size + 7L) & -8L; 665 list_for_each_entry(chunk, chunk_list, list) { 666 if (chunk->size < size) 667 continue; 668 if (chunk->size > size + sizeof(struct dasd_mchunk)) { 669 char *endaddr = (char *) (chunk + 1) + chunk->size; 670 tmp = (struct dasd_mchunk *) (endaddr - size) - 1; 671 tmp->size = size; 672 chunk->size -= size + sizeof(struct dasd_mchunk); 673 chunk = tmp; 674 } else 675 list_del(&chunk->list); 676 return (void *) (chunk + 1); 677 } 678 return NULL; 679 } 680 681 static inline void 682 dasd_free_chunk(struct list_head *chunk_list, void *mem) 683 { 684 struct dasd_mchunk *chunk, *tmp; 685 struct list_head *p, *left; 686 687 chunk = (struct dasd_mchunk *) 688 ((char *) mem - sizeof(struct dasd_mchunk)); 689 /* Find out the left neighbour in chunk_list. */ 690 left = chunk_list; 691 list_for_each(p, chunk_list) { 692 if (list_entry(p, struct dasd_mchunk, list) > chunk) 693 break; 694 left = p; 695 } 696 /* Try to merge with right neighbour = next element from left. */ 697 if (left->next != chunk_list) { 698 tmp = list_entry(left->next, struct dasd_mchunk, list); 699 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) { 700 list_del(&tmp->list); 701 chunk->size += tmp->size + sizeof(struct dasd_mchunk); 702 } 703 } 704 /* Try to merge with left neighbour. */ 705 if (left != chunk_list) { 706 tmp = list_entry(left, struct dasd_mchunk, list); 707 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) { 708 tmp->size += chunk->size + sizeof(struct dasd_mchunk); 709 return; 710 } 711 } 712 __list_add(&chunk->list, left, left->next); 713 } 714 715 /* 716 * Check if bsize is in { 512, 1024, 2048, 4096 } 717 */ 718 static inline int 719 dasd_check_blocksize(int bsize) 720 { 721 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize)) 722 return -EMEDIUMTYPE; 723 return 0; 724 } 725 726 /* externals in dasd.c */ 727 #define DASD_PROFILE_OFF 0 728 #define DASD_PROFILE_ON 1 729 #define DASD_PROFILE_GLOBAL_ONLY 2 730 731 extern debug_info_t *dasd_debug_area; 732 extern struct dasd_profile dasd_global_profile; 733 extern unsigned int dasd_global_profile_level; 734 extern const struct block_device_operations dasd_device_operations; 735 736 extern struct kmem_cache *dasd_page_cache; 737 738 struct dasd_ccw_req * 739 dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *); 740 struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *); 741 void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); 742 void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *); 743 void dasd_wakeup_cb(struct dasd_ccw_req *, void *); 744 745 struct dasd_device *dasd_alloc_device(void); 746 void dasd_free_device(struct dasd_device *); 747 748 struct dasd_block *dasd_alloc_block(void); 749 void dasd_free_block(struct dasd_block *); 750 751 enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved); 752 753 void dasd_enable_device(struct dasd_device *); 754 void dasd_set_target_state(struct dasd_device *, int); 755 void dasd_kick_device(struct dasd_device *); 756 void dasd_restore_device(struct dasd_device *); 757 void dasd_reload_device(struct dasd_device *); 758 void dasd_schedule_requeue(struct dasd_device *); 759 760 void dasd_add_request_head(struct dasd_ccw_req *); 761 void dasd_add_request_tail(struct dasd_ccw_req *); 762 int dasd_start_IO(struct dasd_ccw_req *); 763 int dasd_term_IO(struct dasd_ccw_req *); 764 void dasd_schedule_device_bh(struct dasd_device *); 765 void dasd_schedule_block_bh(struct dasd_block *); 766 int dasd_sleep_on(struct dasd_ccw_req *); 767 int dasd_sleep_on_queue(struct list_head *); 768 int dasd_sleep_on_immediatly(struct dasd_ccw_req *); 769 int dasd_sleep_on_queue_interruptible(struct list_head *); 770 int dasd_sleep_on_interruptible(struct dasd_ccw_req *); 771 void dasd_device_set_timer(struct dasd_device *, int); 772 void dasd_device_clear_timer(struct dasd_device *); 773 void dasd_block_set_timer(struct dasd_block *, int); 774 void dasd_block_clear_timer(struct dasd_block *); 775 int dasd_cancel_req(struct dasd_ccw_req *); 776 int dasd_flush_device_queue(struct dasd_device *); 777 int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *); 778 void dasd_generic_free_discipline(struct dasd_device *); 779 void dasd_generic_remove (struct ccw_device *cdev); 780 int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); 781 int dasd_generic_set_offline (struct ccw_device *cdev); 782 int dasd_generic_notify(struct ccw_device *, int); 783 int dasd_generic_last_path_gone(struct dasd_device *); 784 int dasd_generic_path_operational(struct dasd_device *); 785 void dasd_generic_shutdown(struct ccw_device *); 786 787 void dasd_generic_handle_state_change(struct dasd_device *); 788 int dasd_generic_pm_freeze(struct ccw_device *); 789 int dasd_generic_restore_device(struct ccw_device *); 790 enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *); 791 void dasd_generic_path_event(struct ccw_device *, int *); 792 int dasd_generic_verify_path(struct dasd_device *, __u8); 793 void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *); 794 void dasd_generic_space_avail(struct dasd_device *); 795 796 int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); 797 char *dasd_get_sense(struct irb *); 798 799 void dasd_device_set_stop_bits(struct dasd_device *, int); 800 void dasd_device_remove_stop_bits(struct dasd_device *, int); 801 802 int dasd_device_is_ro(struct dasd_device *); 803 804 void dasd_profile_reset(struct dasd_profile *); 805 int dasd_profile_on(struct dasd_profile *); 806 void dasd_profile_off(struct dasd_profile *); 807 char *dasd_get_user_string(const char __user *, size_t); 808 809 /* externals in dasd_devmap.c */ 810 extern int dasd_max_devindex; 811 extern int dasd_probeonly; 812 extern int dasd_autodetect; 813 extern int dasd_nopav; 814 extern int dasd_nofcx; 815 816 int dasd_devmap_init(void); 817 void dasd_devmap_exit(void); 818 819 struct dasd_device *dasd_create_device(struct ccw_device *); 820 void dasd_delete_device(struct dasd_device *); 821 822 int dasd_get_feature(struct ccw_device *, int); 823 int dasd_set_feature(struct ccw_device *, int, int); 824 825 int dasd_add_sysfs_files(struct ccw_device *); 826 void dasd_remove_sysfs_files(struct ccw_device *); 827 828 struct dasd_device *dasd_device_from_cdev(struct ccw_device *); 829 struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *); 830 struct dasd_device *dasd_device_from_devindex(int); 831 832 void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *); 833 struct dasd_device *dasd_device_from_gendisk(struct gendisk *); 834 835 int dasd_parse(void) __init; 836 int dasd_busid_known(const char *); 837 838 /* externals in dasd_gendisk.c */ 839 int dasd_gendisk_init(void); 840 void dasd_gendisk_exit(void); 841 int dasd_gendisk_alloc(struct dasd_block *); 842 void dasd_gendisk_free(struct dasd_block *); 843 int dasd_scan_partitions(struct dasd_block *); 844 void dasd_destroy_partitions(struct dasd_block *); 845 846 /* externals in dasd_ioctl.c */ 847 int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long); 848 849 /* externals in dasd_proc.c */ 850 int dasd_proc_init(void); 851 void dasd_proc_exit(void); 852 853 /* externals in dasd_erp.c */ 854 struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); 855 struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); 856 struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int, 857 struct dasd_device *); 858 void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); 859 void dasd_log_sense(struct dasd_ccw_req *, struct irb *); 860 void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb); 861 862 /* externals in dasd_3990_erp.c */ 863 struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); 864 void dasd_3990_erp_handle_sim(struct dasd_device *, char *); 865 866 /* externals in dasd_eer.c */ 867 #ifdef CONFIG_DASD_EER 868 int dasd_eer_init(void); 869 void dasd_eer_exit(void); 870 int dasd_eer_enable(struct dasd_device *); 871 void dasd_eer_disable(struct dasd_device *); 872 void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, 873 unsigned int id); 874 void dasd_eer_snss(struct dasd_device *); 875 876 static inline int dasd_eer_enabled(struct dasd_device *device) 877 { 878 return device->eer_cqr != NULL; 879 } 880 #else 881 #define dasd_eer_init() (0) 882 #define dasd_eer_exit() do { } while (0) 883 #define dasd_eer_enable(d) (0) 884 #define dasd_eer_disable(d) do { } while (0) 885 #define dasd_eer_write(d,c,i) do { } while (0) 886 #define dasd_eer_snss(d) do { } while (0) 887 #define dasd_eer_enabled(d) (0) 888 #endif /* CONFIG_DASD_ERR */ 889 890 891 /* DASD path handling functions */ 892 893 /* 894 * helper functions to modify bit masks for a given channel path for a device 895 */ 896 static inline int dasd_path_is_operational(struct dasd_device *device, int chp) 897 { 898 return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 899 } 900 901 static inline int dasd_path_need_verify(struct dasd_device *device, int chp) 902 { 903 return test_bit(DASD_PATH_TBV, &device->path[chp].flags); 904 } 905 906 static inline void dasd_path_verify(struct dasd_device *device, int chp) 907 { 908 __set_bit(DASD_PATH_TBV, &device->path[chp].flags); 909 } 910 911 static inline void dasd_path_clear_verify(struct dasd_device *device, int chp) 912 { 913 __clear_bit(DASD_PATH_TBV, &device->path[chp].flags); 914 } 915 916 static inline void dasd_path_clear_all_verify(struct dasd_device *device) 917 { 918 int chp; 919 920 for (chp = 0; chp < 8; chp++) 921 dasd_path_clear_verify(device, chp); 922 } 923 924 static inline void dasd_path_operational(struct dasd_device *device, int chp) 925 { 926 __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 927 device->opm |= (0x80 >> chp); 928 } 929 930 static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp) 931 { 932 __set_bit(DASD_PATH_NPP, &device->path[chp].flags); 933 } 934 935 static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp) 936 { 937 return test_bit(DASD_PATH_NPP, &device->path[chp].flags); 938 } 939 940 static inline void dasd_path_clear_nonpreferred(struct dasd_device *device, 941 int chp) 942 { 943 __clear_bit(DASD_PATH_NPP, &device->path[chp].flags); 944 } 945 946 static inline void dasd_path_preferred(struct dasd_device *device, int chp) 947 { 948 __set_bit(DASD_PATH_PP, &device->path[chp].flags); 949 } 950 951 static inline int dasd_path_is_preferred(struct dasd_device *device, int chp) 952 { 953 return test_bit(DASD_PATH_PP, &device->path[chp].flags); 954 } 955 956 static inline void dasd_path_clear_preferred(struct dasd_device *device, 957 int chp) 958 { 959 __clear_bit(DASD_PATH_PP, &device->path[chp].flags); 960 } 961 962 static inline void dasd_path_clear_oper(struct dasd_device *device, int chp) 963 { 964 __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 965 device->opm &= ~(0x80 >> chp); 966 } 967 968 static inline void dasd_path_clear_cable(struct dasd_device *device, int chp) 969 { 970 __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 971 } 972 973 static inline void dasd_path_cuir(struct dasd_device *device, int chp) 974 { 975 __set_bit(DASD_PATH_CUIR, &device->path[chp].flags); 976 } 977 978 static inline int dasd_path_is_cuir(struct dasd_device *device, int chp) 979 { 980 return test_bit(DASD_PATH_CUIR, &device->path[chp].flags); 981 } 982 983 static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp) 984 { 985 __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags); 986 } 987 988 static inline void dasd_path_ifcc(struct dasd_device *device, int chp) 989 { 990 set_bit(DASD_PATH_IFCC, &device->path[chp].flags); 991 } 992 993 static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp) 994 { 995 return test_bit(DASD_PATH_IFCC, &device->path[chp].flags); 996 } 997 998 static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp) 999 { 1000 clear_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1001 } 1002 1003 static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp) 1004 { 1005 __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1006 } 1007 1008 static inline void dasd_path_miscabled(struct dasd_device *device, int chp) 1009 { 1010 __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1011 } 1012 1013 static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp) 1014 { 1015 return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1016 } 1017 1018 static inline void dasd_path_nohpf(struct dasd_device *device, int chp) 1019 { 1020 __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1021 } 1022 1023 static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp) 1024 { 1025 return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1026 } 1027 1028 /* 1029 * get functions for path masks 1030 * will return a path masks for the given device 1031 */ 1032 1033 static inline __u8 dasd_path_get_opm(struct dasd_device *device) 1034 { 1035 return device->opm; 1036 } 1037 1038 static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device) 1039 { 1040 int chp; 1041 __u8 tbvpm = 0x00; 1042 1043 for (chp = 0; chp < 8; chp++) 1044 if (dasd_path_need_verify(device, chp)) 1045 tbvpm |= 0x80 >> chp; 1046 return tbvpm; 1047 } 1048 1049 static inline __u8 dasd_path_get_nppm(struct dasd_device *device) 1050 { 1051 int chp; 1052 __u8 npm = 0x00; 1053 1054 for (chp = 0; chp < 8; chp++) { 1055 if (dasd_path_is_nonpreferred(device, chp)) 1056 npm |= 0x80 >> chp; 1057 } 1058 return npm; 1059 } 1060 1061 static inline __u8 dasd_path_get_ppm(struct dasd_device *device) 1062 { 1063 int chp; 1064 __u8 ppm = 0x00; 1065 1066 for (chp = 0; chp < 8; chp++) 1067 if (dasd_path_is_preferred(device, chp)) 1068 ppm |= 0x80 >> chp; 1069 return ppm; 1070 } 1071 1072 static inline __u8 dasd_path_get_cablepm(struct dasd_device *device) 1073 { 1074 int chp; 1075 __u8 cablepm = 0x00; 1076 1077 for (chp = 0; chp < 8; chp++) 1078 if (dasd_path_is_miscabled(device, chp)) 1079 cablepm |= 0x80 >> chp; 1080 return cablepm; 1081 } 1082 1083 static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device) 1084 { 1085 int chp; 1086 __u8 cuirpm = 0x00; 1087 1088 for (chp = 0; chp < 8; chp++) 1089 if (dasd_path_is_cuir(device, chp)) 1090 cuirpm |= 0x80 >> chp; 1091 return cuirpm; 1092 } 1093 1094 static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device) 1095 { 1096 int chp; 1097 __u8 ifccpm = 0x00; 1098 1099 for (chp = 0; chp < 8; chp++) 1100 if (dasd_path_is_ifcc(device, chp)) 1101 ifccpm |= 0x80 >> chp; 1102 return ifccpm; 1103 } 1104 1105 static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device) 1106 { 1107 int chp; 1108 __u8 hpfpm = 0x00; 1109 1110 for (chp = 0; chp < 8; chp++) 1111 if (dasd_path_is_nohpf(device, chp)) 1112 hpfpm |= 0x80 >> chp; 1113 return hpfpm; 1114 } 1115 1116 /* 1117 * add functions for path masks 1118 * the existing path mask will be extended by the given path mask 1119 */ 1120 static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm) 1121 { 1122 int chp; 1123 1124 for (chp = 0; chp < 8; chp++) 1125 if (pm & (0x80 >> chp)) 1126 dasd_path_verify(device, chp); 1127 } 1128 1129 static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device) 1130 { 1131 int chp; 1132 __u8 nopm = 0x00; 1133 1134 for (chp = 0; chp < 8; chp++) 1135 if (dasd_path_is_nohpf(device, chp) || 1136 dasd_path_is_ifcc(device, chp) || 1137 dasd_path_is_cuir(device, chp) || 1138 dasd_path_is_miscabled(device, chp)) 1139 nopm |= 0x80 >> chp; 1140 return nopm; 1141 } 1142 1143 static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm) 1144 { 1145 int chp; 1146 1147 for (chp = 0; chp < 8; chp++) 1148 if (pm & (0x80 >> chp)) { 1149 dasd_path_operational(device, chp); 1150 /* 1151 * if the path is used 1152 * it should not be in one of the negative lists 1153 */ 1154 dasd_path_clear_nohpf(device, chp); 1155 dasd_path_clear_cuir(device, chp); 1156 dasd_path_clear_cable(device, chp); 1157 dasd_path_clear_ifcc(device, chp); 1158 } 1159 } 1160 1161 static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm) 1162 { 1163 int chp; 1164 1165 for (chp = 0; chp < 8; chp++) 1166 if (pm & (0x80 >> chp)) 1167 dasd_path_miscabled(device, chp); 1168 } 1169 1170 static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm) 1171 { 1172 int chp; 1173 1174 for (chp = 0; chp < 8; chp++) 1175 if (pm & (0x80 >> chp)) 1176 dasd_path_cuir(device, chp); 1177 } 1178 1179 static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm) 1180 { 1181 int chp; 1182 1183 for (chp = 0; chp < 8; chp++) 1184 if (pm & (0x80 >> chp)) 1185 dasd_path_ifcc(device, chp); 1186 } 1187 1188 static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm) 1189 { 1190 int chp; 1191 1192 for (chp = 0; chp < 8; chp++) 1193 if (pm & (0x80 >> chp)) 1194 dasd_path_nonpreferred(device, chp); 1195 } 1196 1197 static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm) 1198 { 1199 int chp; 1200 1201 for (chp = 0; chp < 8; chp++) 1202 if (pm & (0x80 >> chp)) 1203 dasd_path_nohpf(device, chp); 1204 } 1205 1206 static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm) 1207 { 1208 int chp; 1209 1210 for (chp = 0; chp < 8; chp++) 1211 if (pm & (0x80 >> chp)) 1212 dasd_path_preferred(device, chp); 1213 } 1214 1215 /* 1216 * set functions for path masks 1217 * the existing path mask will be replaced by the given path mask 1218 */ 1219 static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm) 1220 { 1221 int chp; 1222 1223 for (chp = 0; chp < 8; chp++) 1224 if (pm & (0x80 >> chp)) 1225 dasd_path_verify(device, chp); 1226 else 1227 dasd_path_clear_verify(device, chp); 1228 } 1229 1230 static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm) 1231 { 1232 int chp; 1233 1234 for (chp = 0; chp < 8; chp++) { 1235 dasd_path_clear_oper(device, chp); 1236 if (pm & (0x80 >> chp)) { 1237 dasd_path_operational(device, chp); 1238 /* 1239 * if the path is used 1240 * it should not be in one of the negative lists 1241 */ 1242 dasd_path_clear_nohpf(device, chp); 1243 dasd_path_clear_cuir(device, chp); 1244 dasd_path_clear_cable(device, chp); 1245 dasd_path_clear_ifcc(device, chp); 1246 } 1247 } 1248 } 1249 1250 /* 1251 * remove functions for path masks 1252 * the existing path mask will be cleared with the given path mask 1253 */ 1254 static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm) 1255 { 1256 int chp; 1257 1258 for (chp = 0; chp < 8; chp++) { 1259 if (pm & (0x80 >> chp)) 1260 dasd_path_clear_oper(device, chp); 1261 } 1262 } 1263 1264 /* 1265 * add the newly available path to the to be verified pm and remove it from 1266 * normal operation until it is verified 1267 */ 1268 static inline void dasd_path_available(struct dasd_device *device, int chp) 1269 { 1270 dasd_path_clear_oper(device, chp); 1271 dasd_path_verify(device, chp); 1272 } 1273 1274 static inline void dasd_path_notoper(struct dasd_device *device, int chp) 1275 { 1276 dasd_path_clear_oper(device, chp); 1277 dasd_path_clear_preferred(device, chp); 1278 dasd_path_clear_nonpreferred(device, chp); 1279 } 1280 1281 /* 1282 * remove all paths from normal operation 1283 */ 1284 static inline void dasd_path_no_path(struct dasd_device *device) 1285 { 1286 int chp; 1287 1288 for (chp = 0; chp < 8; chp++) 1289 dasd_path_notoper(device, chp); 1290 1291 dasd_path_clear_all_verify(device); 1292 } 1293 1294 /* end - path handling */ 1295 1296 #endif /* DASD_H */ 1297