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 (*pe_handler)(struct dasd_device *, __u8, __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 #define DASD_PATH_FCSEC 9 422 423 #define DASD_THRHLD_MAX 4294967295U 424 #define DASD_INTERVAL_MAX 4294967295U 425 426 /* FC Endpoint Security Capabilities */ 427 #define DASD_FC_SECURITY_UNSUP 0 428 #define DASD_FC_SECURITY_AUTH 1 429 #define DASD_FC_SECURITY_ENC_FCSP2 2 430 #define DASD_FC_SECURITY_ENC_ERAS 3 431 432 #define DASD_FC_SECURITY_ENC_STR "Encryption" 433 static const struct { 434 u8 value; 435 char *name; 436 } dasd_path_fcs_mnemonics[] = { 437 { DASD_FC_SECURITY_UNSUP, "Unsupported" }, 438 { DASD_FC_SECURITY_AUTH, "Authentication" }, 439 { DASD_FC_SECURITY_ENC_FCSP2, DASD_FC_SECURITY_ENC_STR }, 440 { DASD_FC_SECURITY_ENC_ERAS, DASD_FC_SECURITY_ENC_STR }, 441 }; 442 443 static inline char *dasd_path_get_fcs_str(int val) 444 { 445 int i; 446 447 for (i = 0; i < ARRAY_SIZE(dasd_path_fcs_mnemonics); i++) { 448 if (dasd_path_fcs_mnemonics[i].value == val) 449 return dasd_path_fcs_mnemonics[i].name; 450 } 451 452 return dasd_path_fcs_mnemonics[0].name; 453 } 454 455 struct dasd_path { 456 unsigned long flags; 457 u8 cssid; 458 u8 ssid; 459 u8 chpid; 460 struct dasd_conf_data *conf_data; 461 atomic_t error_count; 462 unsigned long errorclk; 463 u8 fc_security; 464 struct kobject kobj; 465 bool in_sysfs; 466 }; 467 468 #define to_dasd_path(path) container_of(path, struct dasd_path, kobj) 469 470 static inline void dasd_path_release(struct kobject *kobj) 471 { 472 /* Memory for the dasd_path kobject is freed when dasd_free_device() is called */ 473 } 474 475 476 struct dasd_profile_info { 477 /* legacy part of profile data, as in dasd_profile_info_t */ 478 unsigned int dasd_io_reqs; /* number of requests processed */ 479 unsigned int dasd_io_sects; /* number of sectors processed */ 480 unsigned int dasd_io_secs[32]; /* histogram of request's sizes */ 481 unsigned int dasd_io_times[32]; /* histogram of requests's times */ 482 unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */ 483 unsigned int dasd_io_time1[32]; /* hist. of time from build to start */ 484 unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */ 485 unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */ 486 unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */ 487 unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */ 488 489 /* new data */ 490 struct timespec64 starttod; /* time of start or last reset */ 491 unsigned int dasd_io_alias; /* requests using an alias */ 492 unsigned int dasd_io_tpm; /* requests using transport mode */ 493 unsigned int dasd_read_reqs; /* total number of read requests */ 494 unsigned int dasd_read_sects; /* total number read sectors */ 495 unsigned int dasd_read_alias; /* read request using an alias */ 496 unsigned int dasd_read_tpm; /* read requests in transport mode */ 497 unsigned int dasd_read_secs[32]; /* histogram of request's sizes */ 498 unsigned int dasd_read_times[32]; /* histogram of requests's times */ 499 unsigned int dasd_read_time1[32]; /* hist. time from build to start */ 500 unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */ 501 unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */ 502 unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */ 503 unsigned long dasd_sum_times; /* sum of request times */ 504 unsigned long dasd_sum_time_str; /* sum of time from build to start */ 505 unsigned long dasd_sum_time_irq; /* sum of time from start to irq */ 506 unsigned long dasd_sum_time_end; /* sum of time from irq to end */ 507 }; 508 509 struct dasd_profile { 510 struct dentry *dentry; 511 struct dasd_profile_info *data; 512 spinlock_t lock; 513 }; 514 515 struct dasd_format_entry { 516 struct list_head list; 517 sector_t track; 518 }; 519 520 struct dasd_device { 521 /* Block device stuff. */ 522 struct dasd_block *block; 523 524 unsigned int devindex; 525 unsigned long flags; /* per device flags */ 526 unsigned short features; /* copy of devmap-features (read-only!) */ 527 528 /* extended error reporting stuff (eer) */ 529 struct dasd_ccw_req *eer_cqr; 530 531 /* Device discipline stuff. */ 532 struct dasd_discipline *discipline; 533 struct dasd_discipline *base_discipline; 534 void *private; 535 struct dasd_path path[8]; 536 __u8 opm; 537 538 /* Device state and target state. */ 539 int state, target; 540 struct mutex state_mutex; 541 int stopped; /* device (ccw_device_start) was stopped */ 542 543 /* reference count. */ 544 atomic_t ref_count; 545 546 /* ccw queue and memory for static ccw/erp buffers. */ 547 struct list_head ccw_queue; 548 spinlock_t mem_lock; 549 void *ccw_mem; 550 void *erp_mem; 551 void *ese_mem; 552 struct list_head ccw_chunks; 553 struct list_head erp_chunks; 554 struct list_head ese_chunks; 555 556 atomic_t tasklet_scheduled; 557 struct tasklet_struct tasklet; 558 struct work_struct kick_work; 559 struct work_struct reload_device; 560 struct work_struct kick_validate; 561 struct work_struct suc_work; 562 struct work_struct requeue_requests; 563 struct timer_list timer; 564 565 debug_info_t *debug_area; 566 567 struct ccw_device *cdev; 568 569 /* hook for alias management */ 570 struct list_head alias_list; 571 572 /* default expiration time in s */ 573 unsigned long default_expires; 574 unsigned long default_retries; 575 576 unsigned long blk_timeout; 577 578 unsigned long path_thrhld; 579 unsigned long path_interval; 580 581 struct dentry *debugfs_dentry; 582 struct dentry *hosts_dentry; 583 struct dasd_profile profile; 584 struct dasd_format_entry format_entry; 585 struct kset *paths_info; 586 }; 587 588 struct dasd_block { 589 /* Block device stuff. */ 590 struct gendisk *gdp; 591 struct request_queue *request_queue; 592 spinlock_t request_queue_lock; 593 struct blk_mq_tag_set tag_set; 594 struct block_device *bdev; 595 atomic_t open_count; 596 597 unsigned long blocks; /* size of volume in blocks */ 598 unsigned int bp_block; /* bytes per block */ 599 unsigned int s2b_shift; /* log2 (bp_block/512) */ 600 601 struct dasd_device *base; 602 struct list_head ccw_queue; 603 spinlock_t queue_lock; 604 605 atomic_t tasklet_scheduled; 606 struct tasklet_struct tasklet; 607 struct timer_list timer; 608 609 struct dentry *debugfs_dentry; 610 struct dasd_profile profile; 611 612 struct list_head format_list; 613 spinlock_t format_lock; 614 }; 615 616 struct dasd_attention_data { 617 struct dasd_device *device; 618 __u8 lpum; 619 }; 620 621 struct dasd_queue { 622 spinlock_t lock; 623 }; 624 625 /* reasons why device (ccw_device_start) was stopped */ 626 #define DASD_STOPPED_NOT_ACC 1 /* not accessible */ 627 #define DASD_STOPPED_QUIESCE 2 /* Quiesced */ 628 #define DASD_STOPPED_PENDING 4 /* long busy */ 629 #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ 630 #define DASD_STOPPED_SU 16 /* summary unit check handling */ 631 #define DASD_STOPPED_NOSPC 128 /* no space left */ 632 633 /* per device flags */ 634 #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ 635 #define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ 636 #define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ 637 #define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't 638 * confuse this with the user specified 639 * read-only feature. 640 */ 641 #define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */ 642 #define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */ 643 #define DASD_FLAG_SUSPENDED 9 /* The device was suspended */ 644 #define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/ 645 #define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */ 646 #define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */ 647 #define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */ 648 #define DASD_FLAG_SUC 14 /* unhandled summary unit check */ 649 650 #define DASD_SLEEPON_START_TAG ((void *) 1) 651 #define DASD_SLEEPON_END_TAG ((void *) 2) 652 653 void dasd_put_device_wake(struct dasd_device *); 654 655 /* 656 * Reference count inliners 657 */ 658 static inline void 659 dasd_get_device(struct dasd_device *device) 660 { 661 atomic_inc(&device->ref_count); 662 } 663 664 static inline void 665 dasd_put_device(struct dasd_device *device) 666 { 667 if (atomic_dec_return(&device->ref_count) == 0) 668 dasd_put_device_wake(device); 669 } 670 671 /* 672 * The static memory in ccw_mem and erp_mem is managed by a sorted 673 * list of free memory chunks. 674 */ 675 struct dasd_mchunk 676 { 677 struct list_head list; 678 unsigned long size; 679 } __attribute__ ((aligned(8))); 680 681 static inline void 682 dasd_init_chunklist(struct list_head *chunk_list, void *mem, 683 unsigned long size) 684 { 685 struct dasd_mchunk *chunk; 686 687 INIT_LIST_HEAD(chunk_list); 688 chunk = (struct dasd_mchunk *) mem; 689 chunk->size = size - sizeof(struct dasd_mchunk); 690 list_add(&chunk->list, chunk_list); 691 } 692 693 static inline void * 694 dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size) 695 { 696 struct dasd_mchunk *chunk, *tmp; 697 698 size = (size + 7L) & -8L; 699 list_for_each_entry(chunk, chunk_list, list) { 700 if (chunk->size < size) 701 continue; 702 if (chunk->size > size + sizeof(struct dasd_mchunk)) { 703 char *endaddr = (char *) (chunk + 1) + chunk->size; 704 tmp = (struct dasd_mchunk *) (endaddr - size) - 1; 705 tmp->size = size; 706 chunk->size -= size + sizeof(struct dasd_mchunk); 707 chunk = tmp; 708 } else 709 list_del(&chunk->list); 710 return (void *) (chunk + 1); 711 } 712 return NULL; 713 } 714 715 static inline void 716 dasd_free_chunk(struct list_head *chunk_list, void *mem) 717 { 718 struct dasd_mchunk *chunk, *tmp; 719 struct list_head *p, *left; 720 721 chunk = (struct dasd_mchunk *) 722 ((char *) mem - sizeof(struct dasd_mchunk)); 723 /* Find out the left neighbour in chunk_list. */ 724 left = chunk_list; 725 list_for_each(p, chunk_list) { 726 if (list_entry(p, struct dasd_mchunk, list) > chunk) 727 break; 728 left = p; 729 } 730 /* Try to merge with right neighbour = next element from left. */ 731 if (left->next != chunk_list) { 732 tmp = list_entry(left->next, struct dasd_mchunk, list); 733 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) { 734 list_del(&tmp->list); 735 chunk->size += tmp->size + sizeof(struct dasd_mchunk); 736 } 737 } 738 /* Try to merge with left neighbour. */ 739 if (left != chunk_list) { 740 tmp = list_entry(left, struct dasd_mchunk, list); 741 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) { 742 tmp->size += chunk->size + sizeof(struct dasd_mchunk); 743 return; 744 } 745 } 746 __list_add(&chunk->list, left, left->next); 747 } 748 749 /* 750 * Check if bsize is in { 512, 1024, 2048, 4096 } 751 */ 752 static inline int 753 dasd_check_blocksize(int bsize) 754 { 755 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize)) 756 return -EMEDIUMTYPE; 757 return 0; 758 } 759 760 /* externals in dasd.c */ 761 #define DASD_PROFILE_OFF 0 762 #define DASD_PROFILE_ON 1 763 #define DASD_PROFILE_GLOBAL_ONLY 2 764 765 extern debug_info_t *dasd_debug_area; 766 extern struct dasd_profile dasd_global_profile; 767 extern unsigned int dasd_global_profile_level; 768 extern const struct block_device_operations dasd_device_operations; 769 770 extern struct kmem_cache *dasd_page_cache; 771 772 struct dasd_ccw_req * 773 dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *); 774 struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *); 775 void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); 776 void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *); 777 void dasd_wakeup_cb(struct dasd_ccw_req *, void *); 778 779 struct dasd_device *dasd_alloc_device(void); 780 void dasd_free_device(struct dasd_device *); 781 782 struct dasd_block *dasd_alloc_block(void); 783 void dasd_free_block(struct dasd_block *); 784 785 enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved); 786 787 void dasd_enable_device(struct dasd_device *); 788 void dasd_set_target_state(struct dasd_device *, int); 789 void dasd_kick_device(struct dasd_device *); 790 void dasd_reload_device(struct dasd_device *); 791 void dasd_schedule_requeue(struct dasd_device *); 792 793 void dasd_add_request_head(struct dasd_ccw_req *); 794 void dasd_add_request_tail(struct dasd_ccw_req *); 795 int dasd_start_IO(struct dasd_ccw_req *); 796 int dasd_term_IO(struct dasd_ccw_req *); 797 void dasd_schedule_device_bh(struct dasd_device *); 798 void dasd_schedule_block_bh(struct dasd_block *); 799 int dasd_sleep_on(struct dasd_ccw_req *); 800 int dasd_sleep_on_queue(struct list_head *); 801 int dasd_sleep_on_immediatly(struct dasd_ccw_req *); 802 int dasd_sleep_on_queue_interruptible(struct list_head *); 803 int dasd_sleep_on_interruptible(struct dasd_ccw_req *); 804 void dasd_device_set_timer(struct dasd_device *, int); 805 void dasd_device_clear_timer(struct dasd_device *); 806 void dasd_block_set_timer(struct dasd_block *, int); 807 void dasd_block_clear_timer(struct dasd_block *); 808 int dasd_cancel_req(struct dasd_ccw_req *); 809 int dasd_flush_device_queue(struct dasd_device *); 810 int dasd_generic_probe(struct ccw_device *); 811 void dasd_generic_free_discipline(struct dasd_device *); 812 void dasd_generic_remove (struct ccw_device *cdev); 813 int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); 814 int dasd_generic_set_offline (struct ccw_device *cdev); 815 int dasd_generic_notify(struct ccw_device *, int); 816 int dasd_generic_last_path_gone(struct dasd_device *); 817 int dasd_generic_path_operational(struct dasd_device *); 818 void dasd_generic_shutdown(struct ccw_device *); 819 820 void dasd_generic_handle_state_change(struct dasd_device *); 821 enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *); 822 void dasd_generic_path_event(struct ccw_device *, int *); 823 int dasd_generic_verify_path(struct dasd_device *, __u8); 824 void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *); 825 void dasd_generic_space_avail(struct dasd_device *); 826 827 int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); 828 char *dasd_get_sense(struct irb *); 829 830 void dasd_device_set_stop_bits(struct dasd_device *, int); 831 void dasd_device_remove_stop_bits(struct dasd_device *, int); 832 833 int dasd_device_is_ro(struct dasd_device *); 834 835 void dasd_profile_reset(struct dasd_profile *); 836 int dasd_profile_on(struct dasd_profile *); 837 void dasd_profile_off(struct dasd_profile *); 838 char *dasd_get_user_string(const char __user *, size_t); 839 840 /* externals in dasd_devmap.c */ 841 extern int dasd_max_devindex; 842 extern int dasd_probeonly; 843 extern int dasd_autodetect; 844 extern int dasd_nopav; 845 extern int dasd_nofcx; 846 847 int dasd_devmap_init(void); 848 void dasd_devmap_exit(void); 849 850 struct dasd_device *dasd_create_device(struct ccw_device *); 851 void dasd_delete_device(struct dasd_device *); 852 853 int dasd_get_feature(struct ccw_device *, int); 854 int dasd_set_feature(struct ccw_device *, int, int); 855 856 extern const struct attribute_group *dasd_dev_groups[]; 857 void dasd_path_create_kobj(struct dasd_device *, int); 858 void dasd_path_create_kobjects(struct dasd_device *); 859 void dasd_path_remove_kobjects(struct dasd_device *); 860 861 struct dasd_device *dasd_device_from_cdev(struct ccw_device *); 862 struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *); 863 struct dasd_device *dasd_device_from_devindex(int); 864 865 void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *); 866 struct dasd_device *dasd_device_from_gendisk(struct gendisk *); 867 868 int dasd_parse(void) __init; 869 int dasd_busid_known(const char *); 870 871 /* externals in dasd_gendisk.c */ 872 int dasd_gendisk_init(void); 873 void dasd_gendisk_exit(void); 874 int dasd_gendisk_alloc(struct dasd_block *); 875 void dasd_gendisk_free(struct dasd_block *); 876 int dasd_scan_partitions(struct dasd_block *); 877 void dasd_destroy_partitions(struct dasd_block *); 878 879 /* externals in dasd_ioctl.c */ 880 int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long); 881 int dasd_set_read_only(struct block_device *bdev, bool ro); 882 883 /* externals in dasd_proc.c */ 884 int dasd_proc_init(void); 885 void dasd_proc_exit(void); 886 887 /* externals in dasd_erp.c */ 888 struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); 889 struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); 890 struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int, 891 struct dasd_device *); 892 void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); 893 void dasd_log_sense(struct dasd_ccw_req *, struct irb *); 894 void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb); 895 896 /* externals in dasd_3990_erp.c */ 897 struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); 898 void dasd_3990_erp_handle_sim(struct dasd_device *, char *); 899 900 /* externals in dasd_eer.c */ 901 #ifdef CONFIG_DASD_EER 902 int dasd_eer_init(void); 903 void dasd_eer_exit(void); 904 int dasd_eer_enable(struct dasd_device *); 905 void dasd_eer_disable(struct dasd_device *); 906 void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, 907 unsigned int id); 908 void dasd_eer_snss(struct dasd_device *); 909 910 static inline int dasd_eer_enabled(struct dasd_device *device) 911 { 912 return device->eer_cqr != NULL; 913 } 914 #else 915 #define dasd_eer_init() (0) 916 #define dasd_eer_exit() do { } while (0) 917 #define dasd_eer_enable(d) (0) 918 #define dasd_eer_disable(d) do { } while (0) 919 #define dasd_eer_write(d,c,i) do { } while (0) 920 #define dasd_eer_snss(d) do { } while (0) 921 #define dasd_eer_enabled(d) (0) 922 #endif /* CONFIG_DASD_ERR */ 923 924 925 /* DASD path handling functions */ 926 927 /* 928 * helper functions to modify bit masks for a given channel path for a device 929 */ 930 static inline int dasd_path_is_operational(struct dasd_device *device, int chp) 931 { 932 return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 933 } 934 935 static inline int dasd_path_need_verify(struct dasd_device *device, int chp) 936 { 937 return test_bit(DASD_PATH_TBV, &device->path[chp].flags); 938 } 939 940 static inline void dasd_path_verify(struct dasd_device *device, int chp) 941 { 942 __set_bit(DASD_PATH_TBV, &device->path[chp].flags); 943 } 944 945 static inline void dasd_path_clear_verify(struct dasd_device *device, int chp) 946 { 947 __clear_bit(DASD_PATH_TBV, &device->path[chp].flags); 948 } 949 950 static inline void dasd_path_clear_all_verify(struct dasd_device *device) 951 { 952 int chp; 953 954 for (chp = 0; chp < 8; chp++) 955 dasd_path_clear_verify(device, chp); 956 } 957 958 static inline void dasd_path_fcsec(struct dasd_device *device, int chp) 959 { 960 __set_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 961 } 962 963 static inline void dasd_path_clear_fcsec(struct dasd_device *device, int chp) 964 { 965 __clear_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 966 } 967 968 static inline int dasd_path_need_fcsec(struct dasd_device *device, int chp) 969 { 970 return test_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 971 } 972 973 static inline void dasd_path_clear_all_fcsec(struct dasd_device *device) 974 { 975 int chp; 976 977 for (chp = 0; chp < 8; chp++) 978 dasd_path_clear_fcsec(device, chp); 979 } 980 981 static inline void dasd_path_operational(struct dasd_device *device, int chp) 982 { 983 __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 984 device->opm |= (0x80 >> chp); 985 } 986 987 static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp) 988 { 989 __set_bit(DASD_PATH_NPP, &device->path[chp].flags); 990 } 991 992 static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp) 993 { 994 return test_bit(DASD_PATH_NPP, &device->path[chp].flags); 995 } 996 997 static inline void dasd_path_clear_nonpreferred(struct dasd_device *device, 998 int chp) 999 { 1000 __clear_bit(DASD_PATH_NPP, &device->path[chp].flags); 1001 } 1002 1003 static inline void dasd_path_preferred(struct dasd_device *device, int chp) 1004 { 1005 __set_bit(DASD_PATH_PP, &device->path[chp].flags); 1006 } 1007 1008 static inline int dasd_path_is_preferred(struct dasd_device *device, int chp) 1009 { 1010 return test_bit(DASD_PATH_PP, &device->path[chp].flags); 1011 } 1012 1013 static inline void dasd_path_clear_preferred(struct dasd_device *device, 1014 int chp) 1015 { 1016 __clear_bit(DASD_PATH_PP, &device->path[chp].flags); 1017 } 1018 1019 static inline void dasd_path_clear_oper(struct dasd_device *device, int chp) 1020 { 1021 __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 1022 device->opm &= ~(0x80 >> chp); 1023 } 1024 1025 static inline void dasd_path_clear_cable(struct dasd_device *device, int chp) 1026 { 1027 __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1028 } 1029 1030 static inline void dasd_path_cuir(struct dasd_device *device, int chp) 1031 { 1032 __set_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1033 } 1034 1035 static inline int dasd_path_is_cuir(struct dasd_device *device, int chp) 1036 { 1037 return test_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1038 } 1039 1040 static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp) 1041 { 1042 __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1043 } 1044 1045 static inline void dasd_path_ifcc(struct dasd_device *device, int chp) 1046 { 1047 set_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1048 } 1049 1050 static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp) 1051 { 1052 return test_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1053 } 1054 1055 static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp) 1056 { 1057 clear_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1058 } 1059 1060 static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp) 1061 { 1062 __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1063 } 1064 1065 static inline void dasd_path_miscabled(struct dasd_device *device, int chp) 1066 { 1067 __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1068 } 1069 1070 static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp) 1071 { 1072 return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1073 } 1074 1075 static inline void dasd_path_nohpf(struct dasd_device *device, int chp) 1076 { 1077 __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1078 } 1079 1080 static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp) 1081 { 1082 return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1083 } 1084 1085 /* 1086 * get functions for path masks 1087 * will return a path masks for the given device 1088 */ 1089 1090 static inline __u8 dasd_path_get_opm(struct dasd_device *device) 1091 { 1092 return device->opm; 1093 } 1094 1095 static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device) 1096 { 1097 int chp; 1098 __u8 tbvpm = 0x00; 1099 1100 for (chp = 0; chp < 8; chp++) 1101 if (dasd_path_need_verify(device, chp)) 1102 tbvpm |= 0x80 >> chp; 1103 return tbvpm; 1104 } 1105 1106 static inline int dasd_path_get_fcsecpm(struct dasd_device *device) 1107 { 1108 int chp; 1109 1110 for (chp = 0; chp < 8; chp++) 1111 if (dasd_path_need_fcsec(device, chp)) 1112 return 1; 1113 1114 return 0; 1115 } 1116 1117 static inline __u8 dasd_path_get_nppm(struct dasd_device *device) 1118 { 1119 int chp; 1120 __u8 npm = 0x00; 1121 1122 for (chp = 0; chp < 8; chp++) { 1123 if (dasd_path_is_nonpreferred(device, chp)) 1124 npm |= 0x80 >> chp; 1125 } 1126 return npm; 1127 } 1128 1129 static inline __u8 dasd_path_get_ppm(struct dasd_device *device) 1130 { 1131 int chp; 1132 __u8 ppm = 0x00; 1133 1134 for (chp = 0; chp < 8; chp++) 1135 if (dasd_path_is_preferred(device, chp)) 1136 ppm |= 0x80 >> chp; 1137 return ppm; 1138 } 1139 1140 static inline __u8 dasd_path_get_cablepm(struct dasd_device *device) 1141 { 1142 int chp; 1143 __u8 cablepm = 0x00; 1144 1145 for (chp = 0; chp < 8; chp++) 1146 if (dasd_path_is_miscabled(device, chp)) 1147 cablepm |= 0x80 >> chp; 1148 return cablepm; 1149 } 1150 1151 static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device) 1152 { 1153 int chp; 1154 __u8 cuirpm = 0x00; 1155 1156 for (chp = 0; chp < 8; chp++) 1157 if (dasd_path_is_cuir(device, chp)) 1158 cuirpm |= 0x80 >> chp; 1159 return cuirpm; 1160 } 1161 1162 static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device) 1163 { 1164 int chp; 1165 __u8 ifccpm = 0x00; 1166 1167 for (chp = 0; chp < 8; chp++) 1168 if (dasd_path_is_ifcc(device, chp)) 1169 ifccpm |= 0x80 >> chp; 1170 return ifccpm; 1171 } 1172 1173 static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device) 1174 { 1175 int chp; 1176 __u8 hpfpm = 0x00; 1177 1178 for (chp = 0; chp < 8; chp++) 1179 if (dasd_path_is_nohpf(device, chp)) 1180 hpfpm |= 0x80 >> chp; 1181 return hpfpm; 1182 } 1183 1184 static inline u8 dasd_path_get_fcs_path(struct dasd_device *device, int chp) 1185 { 1186 return device->path[chp].fc_security; 1187 } 1188 1189 static inline int dasd_path_get_fcs_device(struct dasd_device *device) 1190 { 1191 u8 fc_sec = 0; 1192 int chp; 1193 1194 for (chp = 0; chp < 8; chp++) { 1195 if (device->opm & (0x80 >> chp)) { 1196 fc_sec = device->path[chp].fc_security; 1197 break; 1198 } 1199 } 1200 for (; chp < 8; chp++) { 1201 if (device->opm & (0x80 >> chp)) 1202 if (device->path[chp].fc_security != fc_sec) 1203 return -EINVAL; 1204 } 1205 1206 return fc_sec; 1207 } 1208 1209 /* 1210 * add functions for path masks 1211 * the existing path mask will be extended by the given path mask 1212 */ 1213 static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm) 1214 { 1215 int chp; 1216 1217 for (chp = 0; chp < 8; chp++) 1218 if (pm & (0x80 >> chp)) 1219 dasd_path_verify(device, chp); 1220 } 1221 1222 static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device) 1223 { 1224 int chp; 1225 __u8 nopm = 0x00; 1226 1227 for (chp = 0; chp < 8; chp++) 1228 if (dasd_path_is_nohpf(device, chp) || 1229 dasd_path_is_ifcc(device, chp) || 1230 dasd_path_is_cuir(device, chp) || 1231 dasd_path_is_miscabled(device, chp)) 1232 nopm |= 0x80 >> chp; 1233 return nopm; 1234 } 1235 1236 static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm) 1237 { 1238 int chp; 1239 1240 for (chp = 0; chp < 8; chp++) 1241 if (pm & (0x80 >> chp)) { 1242 dasd_path_operational(device, chp); 1243 /* 1244 * if the path is used 1245 * it should not be in one of the negative lists 1246 */ 1247 dasd_path_clear_nohpf(device, chp); 1248 dasd_path_clear_cuir(device, chp); 1249 dasd_path_clear_cable(device, chp); 1250 dasd_path_clear_ifcc(device, chp); 1251 } 1252 } 1253 1254 static inline void dasd_path_add_cablepm(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_miscabled(device, chp); 1261 } 1262 1263 static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm) 1264 { 1265 int chp; 1266 1267 for (chp = 0; chp < 8; chp++) 1268 if (pm & (0x80 >> chp)) 1269 dasd_path_cuir(device, chp); 1270 } 1271 1272 static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm) 1273 { 1274 int chp; 1275 1276 for (chp = 0; chp < 8; chp++) 1277 if (pm & (0x80 >> chp)) 1278 dasd_path_ifcc(device, chp); 1279 } 1280 1281 static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm) 1282 { 1283 int chp; 1284 1285 for (chp = 0; chp < 8; chp++) 1286 if (pm & (0x80 >> chp)) 1287 dasd_path_nonpreferred(device, chp); 1288 } 1289 1290 static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm) 1291 { 1292 int chp; 1293 1294 for (chp = 0; chp < 8; chp++) 1295 if (pm & (0x80 >> chp)) 1296 dasd_path_nohpf(device, chp); 1297 } 1298 1299 static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm) 1300 { 1301 int chp; 1302 1303 for (chp = 0; chp < 8; chp++) 1304 if (pm & (0x80 >> chp)) 1305 dasd_path_preferred(device, chp); 1306 } 1307 1308 /* 1309 * set functions for path masks 1310 * the existing path mask will be replaced by the given path mask 1311 */ 1312 static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm) 1313 { 1314 int chp; 1315 1316 for (chp = 0; chp < 8; chp++) 1317 if (pm & (0x80 >> chp)) 1318 dasd_path_verify(device, chp); 1319 else 1320 dasd_path_clear_verify(device, chp); 1321 } 1322 1323 static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm) 1324 { 1325 int chp; 1326 1327 for (chp = 0; chp < 8; chp++) { 1328 dasd_path_clear_oper(device, chp); 1329 if (pm & (0x80 >> chp)) { 1330 dasd_path_operational(device, chp); 1331 /* 1332 * if the path is used 1333 * it should not be in one of the negative lists 1334 */ 1335 dasd_path_clear_nohpf(device, chp); 1336 dasd_path_clear_cuir(device, chp); 1337 dasd_path_clear_cable(device, chp); 1338 dasd_path_clear_ifcc(device, chp); 1339 } 1340 } 1341 } 1342 1343 /* 1344 * remove functions for path masks 1345 * the existing path mask will be cleared with the given path mask 1346 */ 1347 static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm) 1348 { 1349 int chp; 1350 1351 for (chp = 0; chp < 8; chp++) { 1352 if (pm & (0x80 >> chp)) 1353 dasd_path_clear_oper(device, chp); 1354 } 1355 } 1356 1357 /* 1358 * add the newly available path to the to be verified pm and remove it from 1359 * normal operation until it is verified 1360 */ 1361 static inline void dasd_path_available(struct dasd_device *device, int chp) 1362 { 1363 dasd_path_clear_oper(device, chp); 1364 dasd_path_verify(device, chp); 1365 } 1366 1367 static inline void dasd_path_notoper(struct dasd_device *device, int chp) 1368 { 1369 dasd_path_clear_oper(device, chp); 1370 dasd_path_clear_preferred(device, chp); 1371 dasd_path_clear_nonpreferred(device, chp); 1372 } 1373 1374 static inline void dasd_path_fcsec_update(struct dasd_device *device, int chp) 1375 { 1376 dasd_path_fcsec(device, chp); 1377 } 1378 1379 /* 1380 * remove all paths from normal operation 1381 */ 1382 static inline void dasd_path_no_path(struct dasd_device *device) 1383 { 1384 int chp; 1385 1386 for (chp = 0; chp < 8; chp++) 1387 dasd_path_notoper(device, chp); 1388 1389 dasd_path_clear_all_verify(device); 1390 } 1391 1392 /* end - path handling */ 1393 1394 #endif /* DASD_H */ 1395