1 /* 2 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 3 * Horst Hummel <Horst.Hummel@de.ibm.com> 4 * Martin Schwidefsky <schwidefsky@de.ibm.com> 5 * Bugreports.to..: <Linux390@de.ibm.com> 6 * Copyright IBM Corp. 1999, 2009 7 */ 8 9 #ifndef DASD_INT_H 10 #define DASD_INT_H 11 12 /* we keep old device allocation scheme; IOW, minors are still in 0..255 */ 13 #define DASD_PER_MAJOR (1U << (MINORBITS - DASD_PARTN_BITS)) 14 #define DASD_PARTN_MASK ((1 << DASD_PARTN_BITS) - 1) 15 16 /* 17 * States a dasd device can have: 18 * new: the dasd_device structure is allocated. 19 * known: the discipline for the device is identified. 20 * basic: the device can do basic i/o. 21 * unfmt: the device could not be analyzed (format is unknown). 22 * ready: partition detection is done and the device is can do block io. 23 * online: the device accepts requests from the block device queue. 24 * 25 * Things to do for startup state transitions: 26 * new -> known: find discipline for the device and create devfs entries. 27 * known -> basic: request irq line for the device. 28 * basic -> ready: do the initial analysis, e.g. format detection, 29 * do block device setup and detect partitions. 30 * ready -> online: schedule the device tasklet. 31 * Things to do for shutdown state transitions: 32 * online -> ready: just set the new device state. 33 * ready -> basic: flush requests from the block device layer, clear 34 * partition information and reset format information. 35 * basic -> known: terminate all requests and free irq. 36 * known -> new: remove devfs entries and forget discipline. 37 */ 38 39 #define DASD_STATE_NEW 0 40 #define DASD_STATE_KNOWN 1 41 #define DASD_STATE_BASIC 2 42 #define DASD_STATE_UNFMT 3 43 #define DASD_STATE_READY 4 44 #define DASD_STATE_ONLINE 5 45 46 #include <linux/module.h> 47 #include <linux/wait.h> 48 #include <linux/blkdev.h> 49 #include <linux/genhd.h> 50 #include <linux/hdreg.h> 51 #include <linux/interrupt.h> 52 #include <linux/log2.h> 53 #include <asm/ccwdev.h> 54 #include <linux/workqueue.h> 55 #include <asm/debug.h> 56 #include <asm/dasd.h> 57 #include <asm/idals.h> 58 #include <linux/bitops.h> 59 #include <linux/blk-mq.h> 60 61 /* DASD discipline magic */ 62 #define DASD_ECKD_MAGIC 0xC5C3D2C4 63 #define DASD_DIAG_MAGIC 0xC4C9C1C7 64 #define DASD_FBA_MAGIC 0xC6C2C140 65 66 /* 67 * SECTION: Type definitions 68 */ 69 struct dasd_device; 70 struct dasd_block; 71 72 /* BIT DEFINITIONS FOR SENSE DATA */ 73 #define DASD_SENSE_BIT_0 0x80 74 #define DASD_SENSE_BIT_1 0x40 75 #define DASD_SENSE_BIT_2 0x20 76 #define DASD_SENSE_BIT_3 0x10 77 78 /* BIT DEFINITIONS FOR SIM SENSE */ 79 #define DASD_SIM_SENSE 0x0F 80 #define DASD_SIM_MSG_TO_OP 0x03 81 #define DASD_SIM_LOG 0x0C 82 83 /* lock class for nested cdev lock */ 84 #define CDEV_NESTED_FIRST 1 85 #define CDEV_NESTED_SECOND 2 86 87 /* 88 * SECTION: MACROs for klogd and s390 debug feature (dbf) 89 */ 90 #define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \ 91 do { \ 92 debug_sprintf_event(d_device->debug_area, \ 93 d_level, \ 94 d_str "\n", \ 95 d_data); \ 96 } while(0) 97 98 #define DBF_DEV_EXC(d_level, d_device, d_str, d_data...) \ 99 do { \ 100 debug_sprintf_exception(d_device->debug_area, \ 101 d_level, \ 102 d_str "\n", \ 103 d_data); \ 104 } while(0) 105 106 #define DBF_EVENT(d_level, d_str, d_data...)\ 107 do { \ 108 debug_sprintf_event(dasd_debug_area, \ 109 d_level,\ 110 d_str "\n", \ 111 d_data); \ 112 } while(0) 113 114 #define DBF_EVENT_DEVID(d_level, d_cdev, d_str, d_data...) \ 115 do { \ 116 struct ccw_dev_id __dev_id; \ 117 ccw_device_get_id(d_cdev, &__dev_id); \ 118 debug_sprintf_event(dasd_debug_area, \ 119 d_level, \ 120 "0.%x.%04x " d_str "\n", \ 121 __dev_id.ssid, __dev_id.devno, d_data); \ 122 } while (0) 123 124 #define DBF_EXC(d_level, d_str, d_data...)\ 125 do { \ 126 debug_sprintf_exception(dasd_debug_area, \ 127 d_level,\ 128 d_str "\n", \ 129 d_data); \ 130 } while(0) 131 132 /* limit size for an errorstring */ 133 #define ERRORLENGTH 30 134 135 /* definition of dbf debug levels */ 136 #define DBF_EMERG 0 /* system is unusable */ 137 #define DBF_ALERT 1 /* action must be taken immediately */ 138 #define DBF_CRIT 2 /* critical conditions */ 139 #define DBF_ERR 3 /* error conditions */ 140 #define DBF_WARNING 4 /* warning conditions */ 141 #define DBF_NOTICE 5 /* normal but significant condition */ 142 #define DBF_INFO 6 /* informational */ 143 #define DBF_DEBUG 6 /* debug-level messages */ 144 145 /* messages to be written via klogd and dbf */ 146 #define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\ 147 do { \ 148 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ 149 dev_name(&d_device->cdev->dev), d_args); \ 150 DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \ 151 } while(0) 152 153 #define MESSAGE(d_loglevel,d_string,d_args...)\ 154 do { \ 155 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ 156 DBF_EVENT(DBF_ALERT, d_string, d_args); \ 157 } while(0) 158 159 /* messages to be written via klogd only */ 160 #define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\ 161 do { \ 162 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ 163 dev_name(&d_device->cdev->dev), d_args); \ 164 } while(0) 165 166 #define MESSAGE_LOG(d_loglevel,d_string,d_args...)\ 167 do { \ 168 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ 169 } while(0) 170 171 /* Macro to calculate number of blocks per page */ 172 #define BLOCKS_PER_PAGE(blksize) (PAGE_SIZE / blksize) 173 174 struct dasd_ccw_req { 175 unsigned int magic; /* Eye catcher */ 176 struct list_head devlist; /* for dasd_device request queue */ 177 struct list_head blocklist; /* for dasd_block request queue */ 178 179 /* Where to execute what... */ 180 struct dasd_block *block; /* the originating block device */ 181 struct dasd_device *memdev; /* the device used to allocate this */ 182 struct dasd_device *startdev; /* device the request is started on */ 183 struct dasd_device *basedev; /* base device if no block->base */ 184 void *cpaddr; /* address of ccw or tcw */ 185 unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */ 186 char status; /* status of this request */ 187 short retries; /* A retry counter */ 188 unsigned long flags; /* flags of this request */ 189 struct dasd_queue *dq; 190 191 /* ... and how */ 192 unsigned long starttime; /* jiffies time of request start */ 193 unsigned long expires; /* expiration period in jiffies */ 194 char lpm; /* logical path mask */ 195 void *data; /* pointer to data area */ 196 197 /* these are important for recovering erroneous requests */ 198 int intrc; /* internal error, e.g. from start_IO */ 199 struct irb irb; /* device status in case of an error */ 200 struct dasd_ccw_req *refers; /* ERP-chain queueing. */ 201 void *function; /* originating ERP action */ 202 203 /* these are for statistics only */ 204 unsigned long buildclk; /* TOD-clock of request generation */ 205 unsigned long startclk; /* TOD-clock of request start */ 206 unsigned long stopclk; /* TOD-clock of request interrupt */ 207 unsigned long endclk; /* TOD-clock of request termination */ 208 209 /* Callback that is called after reaching final status. */ 210 void (*callback)(struct dasd_ccw_req *, void *data); 211 void *callback_data; 212 }; 213 214 /* 215 * dasd_ccw_req -> status can be: 216 */ 217 #define DASD_CQR_FILLED 0x00 /* request is ready to be processed */ 218 #define DASD_CQR_DONE 0x01 /* request is completed successfully */ 219 #define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */ 220 #define DASD_CQR_IN_ERP 0x03 /* request is in recovery */ 221 #define DASD_CQR_FAILED 0x04 /* request is finally failed */ 222 #define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */ 223 224 #define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */ 225 #define DASD_CQR_IN_IO 0x81 /* request is currently in IO */ 226 #define DASD_CQR_ERROR 0x82 /* request is completed with error */ 227 #define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */ 228 #define DASD_CQR_CLEARED 0x84 /* request was cleared */ 229 #define DASD_CQR_SUCCESS 0x85 /* request was successful */ 230 231 /* default expiration time*/ 232 #define DASD_EXPIRES 300 233 #define DASD_EXPIRES_MAX 40000000 234 #define DASD_RETRIES 256 235 #define DASD_RETRIES_MAX 32768 236 237 /* per dasd_ccw_req flags */ 238 #define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */ 239 #define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */ 240 #define DASD_CQR_VERIFY_PATH 2 /* path verification request */ 241 #define DASD_CQR_ALLOW_SLOCK 3 /* Try this request even when lock was 242 * stolen. Should not be combined with 243 * DASD_CQR_FLAGS_USE_ERP 244 */ 245 /* 246 * The following flags are used to suppress output of certain errors. 247 */ 248 #define DASD_CQR_SUPPRESS_NRF 4 /* Suppress 'No Record Found' error */ 249 #define DASD_CQR_SUPPRESS_FP 5 /* Suppress 'File Protected' error*/ 250 #define DASD_CQR_SUPPRESS_IL 6 /* Suppress 'Incorrect Length' error */ 251 #define DASD_CQR_SUPPRESS_CR 7 /* Suppress 'Command Reject' error */ 252 253 /* 254 * There is no reliable way to determine the number of available CPUs on 255 * LPAR but there is no big performance difference between 1 and the 256 * maximum CPU number. 257 * 64 is a good trade off performance wise. 258 */ 259 #define DASD_NR_HW_QUEUES 64 260 #define DASD_MAX_LCU_DEV 256 261 #define DASD_REQ_PER_DEV 4 262 263 /* Signature for error recovery functions. */ 264 typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *); 265 266 /* 267 * A single CQR can only contain a maximum of 255 CCWs. It is limited by 268 * the locate record and locate record extended count value which can only hold 269 * 1 Byte max. 270 */ 271 #define DASD_CQR_MAX_CCW 255 272 273 /* 274 * Unique identifier for dasd device. 275 */ 276 #define UA_NOT_CONFIGURED 0x00 277 #define UA_BASE_DEVICE 0x01 278 #define UA_BASE_PAV_ALIAS 0x02 279 #define UA_HYPER_PAV_ALIAS 0x03 280 281 struct dasd_uid { 282 __u8 type; 283 char vendor[4]; 284 char serial[15]; 285 __u16 ssid; 286 __u8 real_unit_addr; 287 __u8 base_unit_addr; 288 char vduit[33]; 289 }; 290 291 /* 292 * the struct dasd_discipline is 293 * sth like a table of virtual functions, if you think of dasd_eckd 294 * inheriting dasd... 295 * no, currently we are not planning to reimplement the driver in C++ 296 */ 297 struct dasd_discipline { 298 struct module *owner; 299 char ebcname[8]; /* a name used for tagging and printks */ 300 char name[8]; /* a name used for tagging and printks */ 301 int max_blocks; /* maximum number of blocks to be chained */ 302 303 struct list_head list; /* used for list of disciplines */ 304 305 /* 306 * Device recognition functions. check_device is used to verify 307 * the sense data and the information returned by read device 308 * characteristics. It returns 0 if the discipline can be used 309 * for the device in question. uncheck_device is called during 310 * device shutdown to deregister a device from its discipline. 311 */ 312 int (*check_device) (struct dasd_device *); 313 void (*uncheck_device) (struct dasd_device *); 314 315 /* 316 * do_analysis is used in the step from device state "basic" to 317 * state "accept". It returns 0 if the device can be made ready, 318 * it returns -EMEDIUMTYPE if the device can't be made ready or 319 * -EAGAIN if do_analysis started a ccw that needs to complete 320 * before the analysis may be repeated. 321 */ 322 int (*do_analysis) (struct dasd_block *); 323 324 /* 325 * This function is called, when new paths become available. 326 * Disciplins may use this callback to do necessary setup work, 327 * e.g. verify that new path is compatible with the current 328 * configuration. 329 */ 330 int (*verify_path)(struct dasd_device *, __u8); 331 332 /* 333 * Last things to do when a device is set online, and first things 334 * when it is set offline. 335 */ 336 int (*basic_to_ready) (struct dasd_device *); 337 int (*online_to_ready) (struct dasd_device *); 338 int (*basic_to_known)(struct dasd_device *); 339 340 /* (struct dasd_device *); 341 * Device operation functions. build_cp creates a ccw chain for 342 * a block device request, start_io starts the request and 343 * term_IO cancels it (e.g. in case of a timeout). format_device 344 * formats the device and check_device_format compares the format of 345 * a device with the expected format_data. 346 * handle_terminated_request allows to examine a cqr and prepare 347 * it for retry. 348 */ 349 struct dasd_ccw_req *(*build_cp) (struct dasd_device *, 350 struct dasd_block *, 351 struct request *); 352 int (*start_IO) (struct dasd_ccw_req *); 353 int (*term_IO) (struct dasd_ccw_req *); 354 void (*handle_terminated_request) (struct dasd_ccw_req *); 355 int (*format_device) (struct dasd_device *, 356 struct format_data_t *, int); 357 int (*check_device_format)(struct dasd_device *, 358 struct format_check_t *, int); 359 int (*free_cp) (struct dasd_ccw_req *, struct request *); 360 361 /* 362 * Error recovery functions. examine_error() returns a value that 363 * indicates what to do for an error condition. If examine_error() 364 * returns 'dasd_era_recover' erp_action() is called to create a 365 * special error recovery ccw. erp_postaction() is called after 366 * an error recovery ccw has finished its execution. dump_sense 367 * is called for every error condition to print the sense data 368 * to the console. 369 */ 370 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); 371 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); 372 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, 373 struct irb *); 374 void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *); 375 void (*check_for_device_change) (struct dasd_device *, 376 struct dasd_ccw_req *, 377 struct irb *); 378 379 /* i/o control functions. */ 380 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *); 381 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); 382 int (*ioctl) (struct dasd_block *, unsigned int, void __user *); 383 384 /* suspend/resume functions */ 385 int (*freeze) (struct dasd_device *); 386 int (*restore) (struct dasd_device *); 387 388 /* reload device after state change */ 389 int (*reload) (struct dasd_device *); 390 391 int (*get_uid) (struct dasd_device *, struct dasd_uid *); 392 void (*kick_validate) (struct dasd_device *); 393 int (*check_attention)(struct dasd_device *, __u8); 394 int (*host_access_count)(struct dasd_device *); 395 int (*hosts_print)(struct dasd_device *, struct seq_file *); 396 void (*handle_hpf_error)(struct dasd_device *, struct irb *); 397 void (*disable_hpf)(struct dasd_device *); 398 int (*hpf_enabled)(struct dasd_device *); 399 void (*reset_path)(struct dasd_device *, __u8); 400 }; 401 402 extern struct dasd_discipline *dasd_diag_discipline_pointer; 403 404 /* 405 * Notification numbers for extended error reporting notifications: 406 * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's 407 * eer pointer) is freed. The error reporting module needs to do all necessary 408 * cleanup steps. 409 * The DASD_EER_TRIGGER notification sends the actual error reports (triggers). 410 */ 411 #define DASD_EER_DISABLE 0 412 #define DASD_EER_TRIGGER 1 413 414 /* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */ 415 #define DASD_EER_FATALERROR 1 416 #define DASD_EER_NOPATH 2 417 #define DASD_EER_STATECHANGE 3 418 #define DASD_EER_PPRCSUSPEND 4 419 420 /* DASD path handling */ 421 422 #define DASD_PATH_OPERATIONAL 1 423 #define DASD_PATH_TBV 2 424 #define DASD_PATH_PP 3 425 #define DASD_PATH_NPP 4 426 #define DASD_PATH_MISCABLED 5 427 #define DASD_PATH_NOHPF 6 428 #define DASD_PATH_CUIR 7 429 #define DASD_PATH_IFCC 8 430 431 #define DASD_THRHLD_MAX 4294967295U 432 #define DASD_INTERVAL_MAX 4294967295U 433 434 struct dasd_path { 435 unsigned long flags; 436 u8 cssid; 437 u8 ssid; 438 u8 chpid; 439 struct dasd_conf_data *conf_data; 440 atomic_t error_count; 441 unsigned long errorclk; 442 }; 443 444 445 struct dasd_profile_info { 446 /* legacy part of profile data, as in dasd_profile_info_t */ 447 unsigned int dasd_io_reqs; /* number of requests processed */ 448 unsigned int dasd_io_sects; /* number of sectors processed */ 449 unsigned int dasd_io_secs[32]; /* histogram of request's sizes */ 450 unsigned int dasd_io_times[32]; /* histogram of requests's times */ 451 unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */ 452 unsigned int dasd_io_time1[32]; /* hist. of time from build to start */ 453 unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */ 454 unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */ 455 unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */ 456 unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */ 457 458 /* new data */ 459 struct timespec starttod; /* time of start or last reset */ 460 unsigned int dasd_io_alias; /* requests using an alias */ 461 unsigned int dasd_io_tpm; /* requests using transport mode */ 462 unsigned int dasd_read_reqs; /* total number of read requests */ 463 unsigned int dasd_read_sects; /* total number read sectors */ 464 unsigned int dasd_read_alias; /* read request using an alias */ 465 unsigned int dasd_read_tpm; /* read requests in transport mode */ 466 unsigned int dasd_read_secs[32]; /* histogram of request's sizes */ 467 unsigned int dasd_read_times[32]; /* histogram of requests's times */ 468 unsigned int dasd_read_time1[32]; /* hist. time from build to start */ 469 unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */ 470 unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */ 471 unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */ 472 unsigned long dasd_sum_times; /* sum of request times */ 473 unsigned long dasd_sum_time_str; /* sum of time from build to start */ 474 unsigned long dasd_sum_time_irq; /* sum of time from start to irq */ 475 unsigned long dasd_sum_time_end; /* sum of time from irq to end */ 476 }; 477 478 struct dasd_profile { 479 struct dentry *dentry; 480 struct dasd_profile_info *data; 481 spinlock_t lock; 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 struct list_head ccw_chunks; 516 struct list_head erp_chunks; 517 518 atomic_t tasklet_scheduled; 519 struct tasklet_struct tasklet; 520 struct work_struct kick_work; 521 struct work_struct restore_device; 522 struct work_struct reload_device; 523 struct work_struct kick_validate; 524 struct work_struct suc_work; 525 struct work_struct requeue_requests; 526 struct timer_list timer; 527 528 debug_info_t *debug_area; 529 530 struct ccw_device *cdev; 531 532 /* hook for alias management */ 533 struct list_head alias_list; 534 535 /* default expiration time in s */ 536 unsigned long default_expires; 537 unsigned long default_retries; 538 539 unsigned long blk_timeout; 540 541 unsigned long path_thrhld; 542 unsigned long path_interval; 543 544 struct dentry *debugfs_dentry; 545 struct dentry *hosts_dentry; 546 struct dasd_profile profile; 547 }; 548 549 struct dasd_block { 550 /* Block device stuff. */ 551 struct gendisk *gdp; 552 struct request_queue *request_queue; 553 spinlock_t request_queue_lock; 554 struct blk_mq_tag_set tag_set; 555 struct block_device *bdev; 556 atomic_t open_count; 557 558 unsigned long blocks; /* size of volume in blocks */ 559 unsigned int bp_block; /* bytes per block */ 560 unsigned int s2b_shift; /* log2 (bp_block/512) */ 561 562 struct dasd_device *base; 563 struct list_head ccw_queue; 564 spinlock_t queue_lock; 565 566 atomic_t tasklet_scheduled; 567 struct tasklet_struct tasklet; 568 struct timer_list timer; 569 570 struct dentry *debugfs_dentry; 571 struct dasd_profile profile; 572 }; 573 574 struct dasd_attention_data { 575 struct dasd_device *device; 576 __u8 lpum; 577 }; 578 579 struct dasd_queue { 580 spinlock_t lock; 581 }; 582 583 /* reasons why device (ccw_device_start) was stopped */ 584 #define DASD_STOPPED_NOT_ACC 1 /* not accessible */ 585 #define DASD_STOPPED_QUIESCE 2 /* Quiesced */ 586 #define DASD_STOPPED_PENDING 4 /* long busy */ 587 #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ 588 #define DASD_STOPPED_SU 16 /* summary unit check handling */ 589 #define DASD_STOPPED_PM 32 /* pm state transition */ 590 #define DASD_UNRESUMED_PM 64 /* pm resume failed state */ 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_kmalloc_request(int , int, int, struct dasd_device *); 733 struct dasd_ccw_req * 734 dasd_smalloc_request(int , int, int, struct dasd_device *); 735 void dasd_kfree_request(struct dasd_ccw_req *, struct dasd_device *); 736 void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); 737 void dasd_wakeup_cb(struct dasd_ccw_req *, void *); 738 739 static inline int 740 dasd_kmalloc_set_cda(struct ccw1 *ccw, void *cda, struct dasd_device *device) 741 { 742 return set_normalized_cda(ccw, cda); 743 } 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_interruptible(struct dasd_ccw_req *); 770 void dasd_device_set_timer(struct dasd_device *, int); 771 void dasd_device_clear_timer(struct dasd_device *); 772 void dasd_block_set_timer(struct dasd_block *, int); 773 void dasd_block_clear_timer(struct dasd_block *); 774 int dasd_cancel_req(struct dasd_ccw_req *); 775 int dasd_flush_device_queue(struct dasd_device *); 776 int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *); 777 void dasd_generic_free_discipline(struct dasd_device *); 778 void dasd_generic_remove (struct ccw_device *cdev); 779 int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); 780 int dasd_generic_set_offline (struct ccw_device *cdev); 781 int dasd_generic_notify(struct ccw_device *, int); 782 int dasd_generic_last_path_gone(struct dasd_device *); 783 int dasd_generic_path_operational(struct dasd_device *); 784 void dasd_generic_shutdown(struct ccw_device *); 785 786 void dasd_generic_handle_state_change(struct dasd_device *); 787 int dasd_generic_pm_freeze(struct ccw_device *); 788 int dasd_generic_restore_device(struct ccw_device *); 789 enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *); 790 void dasd_generic_path_event(struct ccw_device *, int *); 791 int dasd_generic_verify_path(struct dasd_device *, __u8); 792 793 int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); 794 char *dasd_get_sense(struct irb *); 795 796 void dasd_device_set_stop_bits(struct dasd_device *, int); 797 void dasd_device_remove_stop_bits(struct dasd_device *, int); 798 799 int dasd_device_is_ro(struct dasd_device *); 800 801 void dasd_profile_reset(struct dasd_profile *); 802 int dasd_profile_on(struct dasd_profile *); 803 void dasd_profile_off(struct dasd_profile *); 804 char *dasd_get_user_string(const char __user *, size_t); 805 806 /* externals in dasd_devmap.c */ 807 extern int dasd_max_devindex; 808 extern int dasd_probeonly; 809 extern int dasd_autodetect; 810 extern int dasd_nopav; 811 extern int dasd_nofcx; 812 813 int dasd_devmap_init(void); 814 void dasd_devmap_exit(void); 815 816 struct dasd_device *dasd_create_device(struct ccw_device *); 817 void dasd_delete_device(struct dasd_device *); 818 819 int dasd_get_feature(struct ccw_device *, int); 820 int dasd_set_feature(struct ccw_device *, int, int); 821 822 int dasd_add_sysfs_files(struct ccw_device *); 823 void dasd_remove_sysfs_files(struct ccw_device *); 824 825 struct dasd_device *dasd_device_from_cdev(struct ccw_device *); 826 struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *); 827 struct dasd_device *dasd_device_from_devindex(int); 828 829 void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *); 830 struct dasd_device *dasd_device_from_gendisk(struct gendisk *); 831 832 int dasd_parse(void) __init; 833 int dasd_busid_known(const char *); 834 835 /* externals in dasd_gendisk.c */ 836 int dasd_gendisk_init(void); 837 void dasd_gendisk_exit(void); 838 int dasd_gendisk_alloc(struct dasd_block *); 839 void dasd_gendisk_free(struct dasd_block *); 840 int dasd_scan_partitions(struct dasd_block *); 841 void dasd_destroy_partitions(struct dasd_block *); 842 843 /* externals in dasd_ioctl.c */ 844 int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long); 845 846 /* externals in dasd_proc.c */ 847 int dasd_proc_init(void); 848 void dasd_proc_exit(void); 849 850 /* externals in dasd_erp.c */ 851 struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); 852 struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); 853 struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int, 854 struct dasd_device *); 855 void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); 856 void dasd_log_sense(struct dasd_ccw_req *, struct irb *); 857 void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb); 858 859 /* externals in dasd_3990_erp.c */ 860 struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); 861 void dasd_3990_erp_handle_sim(struct dasd_device *, char *); 862 863 /* externals in dasd_eer.c */ 864 #ifdef CONFIG_DASD_EER 865 int dasd_eer_init(void); 866 void dasd_eer_exit(void); 867 int dasd_eer_enable(struct dasd_device *); 868 void dasd_eer_disable(struct dasd_device *); 869 void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, 870 unsigned int id); 871 void dasd_eer_snss(struct dasd_device *); 872 873 static inline int dasd_eer_enabled(struct dasd_device *device) 874 { 875 return device->eer_cqr != NULL; 876 } 877 #else 878 #define dasd_eer_init() (0) 879 #define dasd_eer_exit() do { } while (0) 880 #define dasd_eer_enable(d) (0) 881 #define dasd_eer_disable(d) do { } while (0) 882 #define dasd_eer_write(d,c,i) do { } while (0) 883 #define dasd_eer_snss(d) do { } while (0) 884 #define dasd_eer_enabled(d) (0) 885 #endif /* CONFIG_DASD_ERR */ 886 887 888 /* DASD path handling functions */ 889 890 /* 891 * helper functions to modify bit masks for a given channel path for a device 892 */ 893 static inline int dasd_path_is_operational(struct dasd_device *device, int chp) 894 { 895 return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 896 } 897 898 static inline int dasd_path_need_verify(struct dasd_device *device, int chp) 899 { 900 return test_bit(DASD_PATH_TBV, &device->path[chp].flags); 901 } 902 903 static inline void dasd_path_verify(struct dasd_device *device, int chp) 904 { 905 __set_bit(DASD_PATH_TBV, &device->path[chp].flags); 906 } 907 908 static inline void dasd_path_clear_verify(struct dasd_device *device, int chp) 909 { 910 __clear_bit(DASD_PATH_TBV, &device->path[chp].flags); 911 } 912 913 static inline void dasd_path_clear_all_verify(struct dasd_device *device) 914 { 915 int chp; 916 917 for (chp = 0; chp < 8; chp++) 918 dasd_path_clear_verify(device, chp); 919 } 920 921 static inline void dasd_path_operational(struct dasd_device *device, int chp) 922 { 923 __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 924 device->opm |= (0x80 >> chp); 925 } 926 927 static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp) 928 { 929 __set_bit(DASD_PATH_NPP, &device->path[chp].flags); 930 } 931 932 static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp) 933 { 934 return test_bit(DASD_PATH_NPP, &device->path[chp].flags); 935 } 936 937 static inline void dasd_path_clear_nonpreferred(struct dasd_device *device, 938 int chp) 939 { 940 __clear_bit(DASD_PATH_NPP, &device->path[chp].flags); 941 } 942 943 static inline void dasd_path_preferred(struct dasd_device *device, int chp) 944 { 945 __set_bit(DASD_PATH_PP, &device->path[chp].flags); 946 } 947 948 static inline int dasd_path_is_preferred(struct dasd_device *device, int chp) 949 { 950 return test_bit(DASD_PATH_PP, &device->path[chp].flags); 951 } 952 953 static inline void dasd_path_clear_preferred(struct dasd_device *device, 954 int chp) 955 { 956 __clear_bit(DASD_PATH_PP, &device->path[chp].flags); 957 } 958 959 static inline void dasd_path_clear_oper(struct dasd_device *device, int chp) 960 { 961 __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 962 device->opm &= ~(0x80 >> chp); 963 } 964 965 static inline void dasd_path_clear_cable(struct dasd_device *device, int chp) 966 { 967 __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 968 } 969 970 static inline void dasd_path_cuir(struct dasd_device *device, int chp) 971 { 972 __set_bit(DASD_PATH_CUIR, &device->path[chp].flags); 973 } 974 975 static inline int dasd_path_is_cuir(struct dasd_device *device, int chp) 976 { 977 return test_bit(DASD_PATH_CUIR, &device->path[chp].flags); 978 } 979 980 static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp) 981 { 982 __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags); 983 } 984 985 static inline void dasd_path_ifcc(struct dasd_device *device, int chp) 986 { 987 set_bit(DASD_PATH_IFCC, &device->path[chp].flags); 988 } 989 990 static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp) 991 { 992 return test_bit(DASD_PATH_IFCC, &device->path[chp].flags); 993 } 994 995 static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp) 996 { 997 clear_bit(DASD_PATH_IFCC, &device->path[chp].flags); 998 } 999 1000 static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp) 1001 { 1002 __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1003 } 1004 1005 static inline void dasd_path_miscabled(struct dasd_device *device, int chp) 1006 { 1007 __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1008 } 1009 1010 static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp) 1011 { 1012 return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1013 } 1014 1015 static inline void dasd_path_nohpf(struct dasd_device *device, int chp) 1016 { 1017 __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1018 } 1019 1020 static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp) 1021 { 1022 return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1023 } 1024 1025 /* 1026 * get functions for path masks 1027 * will return a path masks for the given device 1028 */ 1029 1030 static inline __u8 dasd_path_get_opm(struct dasd_device *device) 1031 { 1032 return device->opm; 1033 } 1034 1035 static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device) 1036 { 1037 int chp; 1038 __u8 tbvpm = 0x00; 1039 1040 for (chp = 0; chp < 8; chp++) 1041 if (dasd_path_need_verify(device, chp)) 1042 tbvpm |= 0x80 >> chp; 1043 return tbvpm; 1044 } 1045 1046 static inline __u8 dasd_path_get_nppm(struct dasd_device *device) 1047 { 1048 int chp; 1049 __u8 npm = 0x00; 1050 1051 for (chp = 0; chp < 8; chp++) { 1052 if (dasd_path_is_nonpreferred(device, chp)) 1053 npm |= 0x80 >> chp; 1054 } 1055 return npm; 1056 } 1057 1058 static inline __u8 dasd_path_get_ppm(struct dasd_device *device) 1059 { 1060 int chp; 1061 __u8 ppm = 0x00; 1062 1063 for (chp = 0; chp < 8; chp++) 1064 if (dasd_path_is_preferred(device, chp)) 1065 ppm |= 0x80 >> chp; 1066 return ppm; 1067 } 1068 1069 static inline __u8 dasd_path_get_cablepm(struct dasd_device *device) 1070 { 1071 int chp; 1072 __u8 cablepm = 0x00; 1073 1074 for (chp = 0; chp < 8; chp++) 1075 if (dasd_path_is_miscabled(device, chp)) 1076 cablepm |= 0x80 >> chp; 1077 return cablepm; 1078 } 1079 1080 static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device) 1081 { 1082 int chp; 1083 __u8 cuirpm = 0x00; 1084 1085 for (chp = 0; chp < 8; chp++) 1086 if (dasd_path_is_cuir(device, chp)) 1087 cuirpm |= 0x80 >> chp; 1088 return cuirpm; 1089 } 1090 1091 static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device) 1092 { 1093 int chp; 1094 __u8 ifccpm = 0x00; 1095 1096 for (chp = 0; chp < 8; chp++) 1097 if (dasd_path_is_ifcc(device, chp)) 1098 ifccpm |= 0x80 >> chp; 1099 return ifccpm; 1100 } 1101 1102 static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device) 1103 { 1104 int chp; 1105 __u8 hpfpm = 0x00; 1106 1107 for (chp = 0; chp < 8; chp++) 1108 if (dasd_path_is_nohpf(device, chp)) 1109 hpfpm |= 0x80 >> chp; 1110 return hpfpm; 1111 } 1112 1113 /* 1114 * add functions for path masks 1115 * the existing path mask will be extended by the given path mask 1116 */ 1117 static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm) 1118 { 1119 int chp; 1120 1121 for (chp = 0; chp < 8; chp++) 1122 if (pm & (0x80 >> chp)) 1123 dasd_path_verify(device, chp); 1124 } 1125 1126 static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device) 1127 { 1128 int chp; 1129 __u8 nopm = 0x00; 1130 1131 for (chp = 0; chp < 8; chp++) 1132 if (dasd_path_is_nohpf(device, chp) || 1133 dasd_path_is_ifcc(device, chp) || 1134 dasd_path_is_cuir(device, chp) || 1135 dasd_path_is_miscabled(device, chp)) 1136 nopm |= 0x80 >> chp; 1137 return nopm; 1138 } 1139 1140 static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm) 1141 { 1142 int chp; 1143 1144 for (chp = 0; chp < 8; chp++) 1145 if (pm & (0x80 >> chp)) { 1146 dasd_path_operational(device, chp); 1147 /* 1148 * if the path is used 1149 * it should not be in one of the negative lists 1150 */ 1151 dasd_path_clear_nohpf(device, chp); 1152 dasd_path_clear_cuir(device, chp); 1153 dasd_path_clear_cable(device, chp); 1154 dasd_path_clear_ifcc(device, chp); 1155 } 1156 } 1157 1158 static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm) 1159 { 1160 int chp; 1161 1162 for (chp = 0; chp < 8; chp++) 1163 if (pm & (0x80 >> chp)) 1164 dasd_path_miscabled(device, chp); 1165 } 1166 1167 static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm) 1168 { 1169 int chp; 1170 1171 for (chp = 0; chp < 8; chp++) 1172 if (pm & (0x80 >> chp)) 1173 dasd_path_cuir(device, chp); 1174 } 1175 1176 static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm) 1177 { 1178 int chp; 1179 1180 for (chp = 0; chp < 8; chp++) 1181 if (pm & (0x80 >> chp)) 1182 dasd_path_ifcc(device, chp); 1183 } 1184 1185 static inline void dasd_path_add_nppm(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_nonpreferred(device, chp); 1192 } 1193 1194 static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm) 1195 { 1196 int chp; 1197 1198 for (chp = 0; chp < 8; chp++) 1199 if (pm & (0x80 >> chp)) 1200 dasd_path_nohpf(device, chp); 1201 } 1202 1203 static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm) 1204 { 1205 int chp; 1206 1207 for (chp = 0; chp < 8; chp++) 1208 if (pm & (0x80 >> chp)) 1209 dasd_path_preferred(device, chp); 1210 } 1211 1212 /* 1213 * set functions for path masks 1214 * the existing path mask will be replaced by the given path mask 1215 */ 1216 static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm) 1217 { 1218 int chp; 1219 1220 for (chp = 0; chp < 8; chp++) 1221 if (pm & (0x80 >> chp)) 1222 dasd_path_verify(device, chp); 1223 else 1224 dasd_path_clear_verify(device, chp); 1225 } 1226 1227 static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm) 1228 { 1229 int chp; 1230 1231 for (chp = 0; chp < 8; chp++) { 1232 dasd_path_clear_oper(device, chp); 1233 if (pm & (0x80 >> chp)) { 1234 dasd_path_operational(device, chp); 1235 /* 1236 * if the path is used 1237 * it should not be in one of the negative lists 1238 */ 1239 dasd_path_clear_nohpf(device, chp); 1240 dasd_path_clear_cuir(device, chp); 1241 dasd_path_clear_cable(device, chp); 1242 dasd_path_clear_ifcc(device, chp); 1243 } 1244 } 1245 } 1246 1247 /* 1248 * remove functions for path masks 1249 * the existing path mask will be cleared with the given path mask 1250 */ 1251 static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm) 1252 { 1253 int chp; 1254 1255 for (chp = 0; chp < 8; chp++) { 1256 if (pm & (0x80 >> chp)) 1257 dasd_path_clear_oper(device, chp); 1258 } 1259 } 1260 1261 /* 1262 * add the newly available path to the to be verified pm and remove it from 1263 * normal operation until it is verified 1264 */ 1265 static inline void dasd_path_available(struct dasd_device *device, int chp) 1266 { 1267 dasd_path_clear_oper(device, chp); 1268 dasd_path_verify(device, chp); 1269 } 1270 1271 static inline void dasd_path_notoper(struct dasd_device *device, int chp) 1272 { 1273 dasd_path_clear_oper(device, chp); 1274 dasd_path_clear_preferred(device, chp); 1275 dasd_path_clear_nonpreferred(device, chp); 1276 } 1277 1278 /* 1279 * remove all paths from normal operation 1280 */ 1281 static inline void dasd_path_no_path(struct dasd_device *device) 1282 { 1283 int chp; 1284 1285 for (chp = 0; chp < 8; chp++) 1286 dasd_path_notoper(device, chp); 1287 1288 dasd_path_clear_all_verify(device); 1289 } 1290 1291 /* end - path handling */ 1292 1293 #endif /* DASD_H */ 1294