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/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 */ 69struct dasd_device; 70struct 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...) \ 91do { \ 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_EVENT(d_level, d_str, d_data...)\ 99do { \ 100 debug_sprintf_event(dasd_debug_area, \ 101 d_level,\ 102 d_str "\n", \ 103 d_data); \ 104} while(0) 105 106#define DBF_EVENT_DEVID(d_level, d_cdev, d_str, d_data...) \ 107do { \ 108 struct ccw_dev_id __dev_id; \ 109 ccw_device_get_id(d_cdev, &__dev_id); \ 110 debug_sprintf_event(dasd_debug_area, \ 111 d_level, \ 112 "0.%x.%04x " d_str "\n", \ 113 __dev_id.ssid, __dev_id.devno, d_data); \ 114} while (0) 115 116/* definition of dbf debug levels */ 117#define DBF_EMERG 0 /* system is unusable */ 118#define DBF_ALERT 1 /* action must be taken immediately */ 119#define DBF_CRIT 2 /* critical conditions */ 120#define DBF_ERR 3 /* error conditions */ 121#define DBF_WARNING 4 /* warning conditions */ 122#define DBF_NOTICE 5 /* normal but significant condition */ 123#define DBF_INFO 6 /* informational */ 124#define DBF_DEBUG 6 /* debug-level messages */ 125 126/* Macro to calculate number of blocks per page */ 127#define BLOCKS_PER_PAGE(blksize) (PAGE_SIZE / blksize) 128 129struct dasd_ccw_req { 130 unsigned int magic; /* Eye catcher */ 131 int intrc; /* internal error, e.g. from start_IO */ 132 struct list_head devlist; /* for dasd_device request queue */ 133 struct list_head blocklist; /* for dasd_block request queue */ 134 struct dasd_block *block; /* the originating block device */ 135 struct dasd_device *memdev; /* the device used to allocate this */ 136 struct dasd_device *startdev; /* device the request is started on */ 137 struct dasd_device *basedev; /* base device if no block->base */ 138 void *cpaddr; /* address of ccw or tcw */ 139 short retries; /* A retry counter */ 140 unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */ 141 char status; /* status of this request */ 142 char lpm; /* logical path mask */ 143 unsigned long flags; /* flags of this request */ 144 struct dasd_queue *dq; 145 unsigned long starttime; /* jiffies time of request start */ 146 unsigned long expires; /* expiration period in jiffies */ 147 void *data; /* pointer to data area */ 148 struct irb irb; /* device status in case of an error */ 149 struct dasd_ccw_req *refers; /* ERP-chain queueing. */ 150 void *function; /* originating ERP action */ 151 void *mem_chunk; 152 153 unsigned long buildclk; /* TOD-clock of request generation */ 154 unsigned long startclk; /* TOD-clock of request start */ 155 unsigned long stopclk; /* TOD-clock of request interrupt */ 156 unsigned long endclk; /* TOD-clock of request termination */ 157 158 void (*callback)(struct dasd_ccw_req *, void *data); 159 void *callback_data; 160 unsigned int proc_bytes; /* bytes for partial completion */ 161 unsigned int trkcount; /* count formatted tracks */ 162}; 163 164/* 165 * dasd_ccw_req -> status can be: 166 */ 167#define DASD_CQR_FILLED 0x00 /* request is ready to be processed */ 168#define DASD_CQR_DONE 0x01 /* request is completed successfully */ 169#define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */ 170#define DASD_CQR_IN_ERP 0x03 /* request is in recovery */ 171#define DASD_CQR_FAILED 0x04 /* request is finally failed */ 172#define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */ 173 174#define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */ 175#define DASD_CQR_IN_IO 0x81 /* request is currently in IO */ 176#define DASD_CQR_ERROR 0x82 /* request is completed with error */ 177#define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */ 178#define DASD_CQR_CLEARED 0x84 /* request was cleared */ 179#define DASD_CQR_SUCCESS 0x85 /* request was successful */ 180 181/* default expiration time*/ 182#define DASD_EXPIRES 300 183#define DASD_EXPIRES_MAX 40000000 184#define DASD_RETRIES 256 185#define DASD_RETRIES_MAX 32768 186 187/* per dasd_ccw_req flags */ 188#define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */ 189#define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */ 190#define DASD_CQR_VERIFY_PATH 2 /* path verification request */ 191#define DASD_CQR_ALLOW_SLOCK 3 /* Try this request even when lock was 192 * stolen. Should not be combined with 193 * DASD_CQR_FLAGS_USE_ERP 194 */ 195/* 196 * The following flags are used to suppress output of certain errors. 197 */ 198#define DASD_CQR_SUPPRESS_NRF 4 /* Suppress 'No Record Found' error */ 199#define DASD_CQR_SUPPRESS_FP 5 /* Suppress 'File Protected' error*/ 200#define DASD_CQR_SUPPRESS_IL 6 /* Suppress 'Incorrect Length' error */ 201#define DASD_CQR_SUPPRESS_CR 7 /* Suppress 'Command Reject' error */ 202 203#define DASD_REQ_PER_DEV 4 204 205/* Signature for error recovery functions. */ 206typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *); 207 208/* 209 * A single CQR can only contain a maximum of 255 CCWs. It is limited by 210 * the locate record and locate record extended count value which can only hold 211 * 1 Byte max. 212 */ 213#define DASD_CQR_MAX_CCW 255 214 215/* 216 * Unique identifier for dasd device. 217 */ 218#define UA_NOT_CONFIGURED 0x00 219#define UA_BASE_DEVICE 0x01 220#define UA_BASE_PAV_ALIAS 0x02 221#define UA_HYPER_PAV_ALIAS 0x03 222 223struct dasd_uid { 224 __u8 type; 225 char vendor[4]; 226 char serial[15]; 227 __u16 ssid; 228 __u8 real_unit_addr; 229 __u8 base_unit_addr; 230 char vduit[33]; 231}; 232 233#define DASD_UID_STRLEN ( /* vendor */ 3 + 1 + /* serial */ 14 + 1 + \ 234 /* SSID */ 4 + 1 + /* unit addr */ 2 + 1 + \ 235 /* vduit */ 32 + 1) 236 237/* 238 * PPRC Status data 239 */ 240struct dasd_pprc_header { 241 __u8 entries; /* 0 Number of device entries */ 242 __u8 unused; /* 1 unused */ 243 __u16 entry_length; /* 2-3 Length of device entry */ 244 __u32 unused2; /* 4-7 unused */ 245} __packed; 246 247struct dasd_pprc_dev_info { 248 __u8 state; /* 0 Copy State */ 249 __u8 flags; /* 1 Flags */ 250 __u8 reserved1[2]; /* 2-3 reserved */ 251 __u8 prim_lss; /* 4 Primary device LSS */ 252 __u8 primary; /* 5 Primary device address */ 253 __u8 sec_lss; /* 6 Secondary device LSS */ 254 __u8 secondary; /* 7 Secondary device address */ 255 __u16 pprc_id; /* 8-9 Peer-to-Peer Remote Copy ID */ 256 __u8 reserved2[12]; /* 10-21 reserved */ 257 __u16 prim_cu_ssid; /* 22-23 Primary Control Unit SSID */ 258 __u8 reserved3[12]; /* 24-35 reserved */ 259 __u16 sec_cu_ssid; /* 36-37 Secondary Control Unit SSID */ 260 __u8 reserved4[90]; /* 38-127 reserved */ 261} __packed; 262 263struct dasd_pprc_data_sc4 { 264 struct dasd_pprc_header header; 265 struct dasd_pprc_dev_info dev_info[5]; 266} __packed; 267 268#define DASD_BUS_ID_SIZE 20 269#define DASD_CP_ENTRIES 5 270 271struct dasd_copy_entry { 272 char busid[DASD_BUS_ID_SIZE]; 273 struct dasd_device *device; 274 bool primary; 275 bool configured; 276}; 277 278struct dasd_copy_relation { 279 struct dasd_copy_entry entry[DASD_CP_ENTRIES]; 280 struct dasd_copy_entry *active; 281}; 282 283int dasd_devmap_set_device_copy_relation(struct ccw_device *, 284 bool pprc_enabled); 285 286/* 287 * the struct dasd_discipline is 288 * sth like a table of virtual functions, if you think of dasd_eckd 289 * inheriting dasd... 290 * no, currently we are not planning to reimplement the driver in C++ 291 */ 292struct dasd_discipline { 293 struct module *owner; 294 char ebcname[8]; /* a name used for tagging and printks */ 295 char name[8]; /* a name used for tagging and printks */ 296 bool has_discard; 297 298 struct list_head list; /* used for list of disciplines */ 299 300 /* 301 * Device recognition functions. check_device is used to verify 302 * the sense data and the information returned by read device 303 * characteristics. It returns 0 if the discipline can be used 304 * for the device in question. uncheck_device is called during 305 * device shutdown to deregister a device from its discipline. 306 */ 307 int (*check_device) (struct dasd_device *); 308 void (*uncheck_device) (struct dasd_device *); 309 310 /* 311 * do_analysis is used in the step from device state "basic" to 312 * state "accept". It returns 0 if the device can be made ready, 313 * it returns -EMEDIUMTYPE if the device can't be made ready or 314 * -EAGAIN if do_analysis started a ccw that needs to complete 315 * before the analysis may be repeated. 316 */ 317 int (*do_analysis) (struct dasd_block *); 318 319 /* 320 * This function is called, when new paths become available. 321 * Disciplins may use this callback to do necessary setup work, 322 * e.g. verify that new path is compatible with the current 323 * configuration. 324 */ 325 int (*pe_handler)(struct dasd_device *, __u8, __u8); 326 327 /* 328 * Last things to do when a device is set online, and first things 329 * when it is set offline. 330 */ 331 int (*basic_to_ready) (struct dasd_device *); 332 int (*online_to_ready) (struct dasd_device *); 333 int (*basic_to_known)(struct dasd_device *); 334 335 unsigned int (*max_sectors)(struct dasd_block *); 336 /* (struct dasd_device *); 337 * Device operation functions. build_cp creates a ccw chain for 338 * a block device request, start_io starts the request and 339 * term_IO cancels it (e.g. in case of a timeout). format_device 340 * formats the device and check_device_format compares the format of 341 * a device with the expected format_data. 342 * handle_terminated_request allows to examine a cqr and prepare 343 * it for retry. 344 */ 345 struct dasd_ccw_req *(*build_cp) (struct dasd_device *, 346 struct dasd_block *, 347 struct request *); 348 int (*start_IO) (struct dasd_ccw_req *); 349 int (*term_IO) (struct dasd_ccw_req *); 350 void (*handle_terminated_request) (struct dasd_ccw_req *); 351 int (*format_device) (struct dasd_device *, 352 struct format_data_t *, int); 353 int (*check_device_format)(struct dasd_device *, 354 struct format_check_t *, int); 355 int (*free_cp) (struct dasd_ccw_req *, struct request *); 356 357 /* 358 * Error recovery functions. examine_error() returns a value that 359 * indicates what to do for an error condition. If examine_error() 360 * returns 'dasd_era_recover' erp_action() is called to create a 361 * special error recovery ccw. erp_postaction() is called after 362 * an error recovery ccw has finished its execution. dump_sense 363 * is called for every error condition to print the sense data 364 * to the console. 365 */ 366 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); 367 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); 368 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, 369 struct irb *); 370 void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *); 371 void (*check_for_device_change) (struct dasd_device *, 372 struct dasd_ccw_req *, 373 struct irb *); 374 375 /* i/o control functions. */ 376 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *); 377 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); 378 int (*ioctl) (struct dasd_block *, unsigned int, void __user *); 379 380 /* reload device after state change */ 381 int (*reload) (struct dasd_device *); 382 383 int (*get_uid) (struct dasd_device *, struct dasd_uid *); 384 void (*kick_validate) (struct dasd_device *); 385 int (*check_attention)(struct dasd_device *, __u8); 386 int (*host_access_count)(struct dasd_device *); 387 int (*hosts_print)(struct dasd_device *, struct seq_file *); 388 void (*handle_hpf_error)(struct dasd_device *, struct irb *); 389 void (*disable_hpf)(struct dasd_device *); 390 int (*hpf_enabled)(struct dasd_device *); 391 void (*reset_path)(struct dasd_device *, __u8); 392 393 /* 394 * Extent Space Efficient (ESE) relevant functions 395 */ 396 int (*is_ese)(struct dasd_device *); 397 /* Capacity */ 398 int (*space_allocated)(struct dasd_device *); 399 int (*space_configured)(struct dasd_device *); 400 int (*logical_capacity)(struct dasd_device *); 401 int (*release_space)(struct dasd_device *, struct format_data_t *); 402 /* Extent Pool */ 403 int (*ext_pool_id)(struct dasd_device *); 404 int (*ext_size)(struct dasd_device *); 405 int (*ext_pool_cap_at_warnlevel)(struct dasd_device *); 406 int (*ext_pool_warn_thrshld)(struct dasd_device *); 407 int (*ext_pool_oos)(struct dasd_device *); 408 int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *); 409 struct dasd_ccw_req *(*ese_format)(struct dasd_device *, 410 struct dasd_ccw_req *, struct irb *); 411 int (*ese_read)(struct dasd_ccw_req *, struct irb *); 412 int (*pprc_status)(struct dasd_device *, struct dasd_pprc_data_sc4 *); 413 bool (*pprc_enabled)(struct dasd_device *); 414 int (*copy_pair_swap)(struct dasd_device *, char *, char *); 415 int (*device_ping)(struct dasd_device *); 416}; 417 418extern struct dasd_discipline *dasd_diag_discipline_pointer; 419 420/* Trigger IDs for extended error reporting DASD EER and autoquiesce */ 421enum eer_trigger { 422 DASD_EER_FATALERROR = 1, 423 DASD_EER_NOPATH, 424 DASD_EER_STATECHANGE, 425 DASD_EER_PPRCSUSPEND, 426 DASD_EER_NOSPC, 427 DASD_EER_TIMEOUTS, 428 DASD_EER_STARTIO, 429 430 /* enum end marker, only add new trigger above */ 431 DASD_EER_MAX, 432 DASD_EER_AUTOQUIESCE = 31, /* internal only */ 433}; 434 435#define DASD_EER_VALID ((1U << DASD_EER_MAX) - 1) 436 437/* DASD path handling */ 438 439#define DASD_PATH_OPERATIONAL 1 440#define DASD_PATH_TBV 2 441#define DASD_PATH_PP 3 442#define DASD_PATH_NPP 4 443#define DASD_PATH_MISCABLED 5 444#define DASD_PATH_NOHPF 6 445#define DASD_PATH_CUIR 7 446#define DASD_PATH_IFCC 8 447#define DASD_PATH_FCSEC 9 448 449#define DASD_THRHLD_MAX 4294967295U 450#define DASD_INTERVAL_MAX 4294967295U 451 452/* FC Endpoint Security Capabilities */ 453#define DASD_FC_SECURITY_UNSUP 0 454#define DASD_FC_SECURITY_AUTH 1 455#define DASD_FC_SECURITY_ENC_FCSP2 2 456#define DASD_FC_SECURITY_ENC_ERAS 3 457 458#define DASD_FC_SECURITY_ENC_STR "Encryption" 459static const struct { 460 u8 value; 461 char *name; 462} dasd_path_fcs_mnemonics[] = { 463 { DASD_FC_SECURITY_UNSUP, "Unsupported" }, 464 { DASD_FC_SECURITY_AUTH, "Authentication" }, 465 { DASD_FC_SECURITY_ENC_FCSP2, DASD_FC_SECURITY_ENC_STR }, 466 { DASD_FC_SECURITY_ENC_ERAS, DASD_FC_SECURITY_ENC_STR }, 467}; 468 469static inline char *dasd_path_get_fcs_str(int val) 470{ 471 int i; 472 473 for (i = 0; i < ARRAY_SIZE(dasd_path_fcs_mnemonics); i++) { 474 if (dasd_path_fcs_mnemonics[i].value == val) 475 return dasd_path_fcs_mnemonics[i].name; 476 } 477 478 return dasd_path_fcs_mnemonics[0].name; 479} 480 481struct dasd_path { 482 unsigned long flags; 483 u8 cssid; 484 u8 ssid; 485 u8 chpid; 486 struct dasd_conf_data *conf_data; 487 atomic_t error_count; 488 unsigned long errorclk; 489 u8 fc_security; 490 struct kobject kobj; 491 bool in_sysfs; 492}; 493 494#define to_dasd_path(path) container_of(path, struct dasd_path, kobj) 495 496static inline void dasd_path_release(struct kobject *kobj) 497{ 498/* Memory for the dasd_path kobject is freed when dasd_free_device() is called */ 499} 500 501 502struct dasd_profile_info { 503 /* legacy part of profile data, as in dasd_profile_info_t */ 504 unsigned int dasd_io_reqs; /* number of requests processed */ 505 unsigned int dasd_io_sects; /* number of sectors processed */ 506 unsigned int dasd_io_secs[32]; /* histogram of request's sizes */ 507 unsigned int dasd_io_times[32]; /* histogram of requests's times */ 508 unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */ 509 unsigned int dasd_io_time1[32]; /* hist. of time from build to start */ 510 unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */ 511 unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */ 512 unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */ 513 unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */ 514 515 /* new data */ 516 struct timespec64 starttod; /* time of start or last reset */ 517 unsigned int dasd_io_alias; /* requests using an alias */ 518 unsigned int dasd_io_tpm; /* requests using transport mode */ 519 unsigned int dasd_read_reqs; /* total number of read requests */ 520 unsigned int dasd_read_sects; /* total number read sectors */ 521 unsigned int dasd_read_alias; /* read request using an alias */ 522 unsigned int dasd_read_tpm; /* read requests in transport mode */ 523 unsigned int dasd_read_secs[32]; /* histogram of request's sizes */ 524 unsigned int dasd_read_times[32]; /* histogram of requests's times */ 525 unsigned int dasd_read_time1[32]; /* hist. time from build to start */ 526 unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */ 527 unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */ 528 unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */ 529 unsigned long dasd_sum_times; /* sum of request times */ 530 unsigned long dasd_sum_time_str; /* sum of time from build to start */ 531 unsigned long dasd_sum_time_irq; /* sum of time from start to irq */ 532 unsigned long dasd_sum_time_end; /* sum of time from irq to end */ 533}; 534 535struct dasd_profile { 536 struct dentry *dentry; 537 struct dasd_profile_info *data; 538 spinlock_t lock; 539}; 540 541struct dasd_format_entry { 542 struct list_head list; 543 sector_t track; 544}; 545 546struct dasd_device { 547 /* Block device stuff. */ 548 struct dasd_block *block; 549 550 unsigned int devindex; 551 unsigned long flags; /* per device flags */ 552 unsigned short features; /* copy of devmap-features (read-only!) */ 553 554 /* extended error reporting stuff (eer) */ 555 struct dasd_ccw_req *eer_cqr; 556 557 /* Device discipline stuff. */ 558 struct dasd_discipline *discipline; 559 struct dasd_discipline *base_discipline; 560 void *private; 561 struct dasd_path path[8]; 562 __u8 opm; 563 564 /* Device state and target state. */ 565 int state, target; 566 struct mutex state_mutex; 567 int stopped; /* device (ccw_device_start) was stopped */ 568 569 /* reference count. */ 570 atomic_t ref_count; 571 572 /* ccw queue and memory for static ccw/erp buffers. */ 573 struct list_head ccw_queue; 574 spinlock_t mem_lock; 575 void *ccw_mem; 576 void *erp_mem; 577 void *ese_mem; 578 struct list_head ccw_chunks; 579 struct list_head erp_chunks; 580 struct list_head ese_chunks; 581 582 atomic_t tasklet_scheduled; 583 struct tasklet_struct tasklet; 584 struct work_struct kick_work; 585 struct work_struct reload_device; 586 struct work_struct kick_validate; 587 struct work_struct suc_work; 588 struct work_struct requeue_requests; 589 struct timer_list timer; 590 591 debug_info_t *debug_area; 592 593 struct ccw_device *cdev; 594 595 /* hook for alias management */ 596 struct list_head alias_list; 597 598 /* default expiration time in s */ 599 unsigned long default_expires; 600 unsigned long default_retries; 601 602 unsigned long blk_timeout; 603 604 unsigned long path_thrhld; 605 unsigned long path_interval; 606 607 struct dentry *debugfs_dentry; 608 struct dentry *hosts_dentry; 609 struct dasd_profile profile; 610 struct dasd_format_entry format_entry; 611 struct kset *paths_info; 612 struct dasd_copy_relation *copy; 613 unsigned long aq_mask; 614 unsigned int aq_timeouts; 615}; 616 617struct dasd_block { 618 /* Block device stuff. */ 619 struct gendisk *gdp; 620 spinlock_t request_queue_lock; 621 struct blk_mq_tag_set tag_set; 622 struct file *bdev_file; 623 atomic_t open_count; 624 625 unsigned long blocks; /* size of volume in blocks */ 626 unsigned int bp_block; /* bytes per block */ 627 unsigned int s2b_shift; /* log2 (bp_block/512) */ 628 629 struct dasd_device *base; 630 struct list_head ccw_queue; 631 spinlock_t queue_lock; 632 633 atomic_t tasklet_scheduled; 634 struct tasklet_struct tasklet; 635 struct timer_list timer; 636 637 struct dentry *debugfs_dentry; 638 struct dasd_profile profile; 639 640 struct list_head format_list; 641 spinlock_t format_lock; 642 atomic_t trkcount; 643}; 644 645struct dasd_attention_data { 646 struct dasd_device *device; 647 __u8 lpum; 648}; 649 650struct dasd_queue { 651 spinlock_t lock; 652}; 653 654/* reasons why device (ccw_device_start) was stopped */ 655#define DASD_STOPPED_NOT_ACC 1 /* not accessible */ 656#define DASD_STOPPED_QUIESCE 2 /* Quiesced */ 657#define DASD_STOPPED_PENDING 4 /* long busy */ 658#define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ 659#define DASD_STOPPED_SU 16 /* summary unit check handling */ 660#define DASD_STOPPED_PPRC 32 /* PPRC swap */ 661#define DASD_STOPPED_NOSPC 128 /* no space left */ 662 663/* per device flags */ 664#define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ 665#define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ 666#define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ 667#define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't 668 * confuse this with the user specified 669 * read-only feature. 670 */ 671#define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */ 672#define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */ 673#define DASD_FLAG_SUSPENDED 9 /* The device was suspended */ 674#define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/ 675#define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */ 676#define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */ 677#define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */ 678#define DASD_FLAG_SUC 14 /* unhandled summary unit check */ 679 680#define DASD_SLEEPON_START_TAG ((void *) 1) 681#define DASD_SLEEPON_END_TAG ((void *) 2) 682 683void dasd_put_device_wake(struct dasd_device *); 684 685/* 686 * return values to be returned from the copy pair swap function 687 * 0x00: swap successful 688 * 0x01: swap data invalid 689 * 0x02: no active device found 690 * 0x03: wrong primary specified 691 * 0x04: secondary device not found 692 * 0x05: swap already running 693 */ 694#define DASD_COPYPAIRSWAP_SUCCESS 0 695#define DASD_COPYPAIRSWAP_INVALID 1 696#define DASD_COPYPAIRSWAP_NOACTIVE 2 697#define DASD_COPYPAIRSWAP_PRIMARY 3 698#define DASD_COPYPAIRSWAP_SECONDARY 4 699#define DASD_COPYPAIRSWAP_MULTIPLE 5 700 701/* 702 * Reference count inliners 703 */ 704static inline void 705dasd_get_device(struct dasd_device *device) 706{ 707 atomic_inc(&device->ref_count); 708} 709 710static inline void 711dasd_put_device(struct dasd_device *device) 712{ 713 if (atomic_dec_return(&device->ref_count) == 0) 714 dasd_put_device_wake(device); 715} 716 717/* 718 * The static memory in ccw_mem and erp_mem is managed by a sorted 719 * list of free memory chunks. 720 */ 721struct dasd_mchunk 722{ 723 struct list_head list; 724 unsigned long size; 725} __attribute__ ((aligned(8))); 726 727static inline void 728dasd_init_chunklist(struct list_head *chunk_list, void *mem, 729 unsigned long size) 730{ 731 struct dasd_mchunk *chunk; 732 733 INIT_LIST_HEAD(chunk_list); 734 chunk = (struct dasd_mchunk *) mem; 735 chunk->size = size - sizeof(struct dasd_mchunk); 736 list_add(&chunk->list, chunk_list); 737} 738 739static inline void * 740dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size) 741{ 742 struct dasd_mchunk *chunk, *tmp; 743 744 size = (size + 7L) & -8L; 745 list_for_each_entry(chunk, chunk_list, list) { 746 if (chunk->size < size) 747 continue; 748 if (chunk->size > size + sizeof(struct dasd_mchunk)) { 749 char *endaddr = (char *) (chunk + 1) + chunk->size; 750 tmp = (struct dasd_mchunk *) (endaddr - size) - 1; 751 tmp->size = size; 752 chunk->size -= size + sizeof(struct dasd_mchunk); 753 chunk = tmp; 754 } else 755 list_del(&chunk->list); 756 return (void *) (chunk + 1); 757 } 758 return NULL; 759} 760 761static inline void 762dasd_free_chunk(struct list_head *chunk_list, void *mem) 763{ 764 struct dasd_mchunk *chunk, *tmp; 765 struct list_head *p, *left; 766 767 chunk = (struct dasd_mchunk *) 768 ((char *) mem - sizeof(struct dasd_mchunk)); 769 /* Find out the left neighbour in chunk_list. */ 770 left = chunk_list; 771 list_for_each(p, chunk_list) { 772 if (list_entry(p, struct dasd_mchunk, list) > chunk) 773 break; 774 left = p; 775 } 776 /* Try to merge with right neighbour = next element from left. */ 777 if (left->next != chunk_list) { 778 tmp = list_entry(left->next, struct dasd_mchunk, list); 779 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) { 780 list_del(&tmp->list); 781 chunk->size += tmp->size + sizeof(struct dasd_mchunk); 782 } 783 } 784 /* Try to merge with left neighbour. */ 785 if (left != chunk_list) { 786 tmp = list_entry(left, struct dasd_mchunk, list); 787 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) { 788 tmp->size += chunk->size + sizeof(struct dasd_mchunk); 789 return; 790 } 791 } 792 __list_add(&chunk->list, left, left->next); 793} 794 795/* 796 * Check if bsize is in { 512, 1024, 2048, 4096 } 797 */ 798static inline int 799dasd_check_blocksize(int bsize) 800{ 801 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize)) 802 return -EMEDIUMTYPE; 803 return 0; 804} 805 806/* 807 * return the callback data of the original request in case there are 808 * ERP requests build on top of it 809 */ 810static inline void *dasd_get_callback_data(struct dasd_ccw_req *cqr) 811{ 812 while (cqr->refers) 813 cqr = cqr->refers; 814 815 return cqr->callback_data; 816} 817 818/* externals in dasd.c */ 819#define DASD_PROFILE_OFF 0 820#define DASD_PROFILE_ON 1 821#define DASD_PROFILE_GLOBAL_ONLY 2 822 823extern debug_info_t *dasd_debug_area; 824extern struct dasd_profile dasd_global_profile; 825extern unsigned int dasd_global_profile_level; 826extern const struct block_device_operations dasd_device_operations; 827extern struct blk_mq_ops dasd_mq_ops; 828 829extern struct kmem_cache *dasd_page_cache; 830 831struct dasd_ccw_req * 832dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *); 833struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *); 834void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); 835void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *); 836void dasd_wakeup_cb(struct dasd_ccw_req *, void *); 837 838struct dasd_device *dasd_alloc_device(void); 839void dasd_free_device(struct dasd_device *); 840 841struct dasd_block *dasd_alloc_block(void); 842void dasd_free_block(struct dasd_block *); 843 844enum blk_eh_timer_return dasd_times_out(struct request *req); 845 846void dasd_enable_device(struct dasd_device *); 847void dasd_set_target_state(struct dasd_device *, int); 848void dasd_kick_device(struct dasd_device *); 849void dasd_reload_device(struct dasd_device *); 850void dasd_schedule_requeue(struct dasd_device *); 851 852void dasd_add_request_head(struct dasd_ccw_req *); 853void dasd_add_request_tail(struct dasd_ccw_req *); 854int dasd_start_IO(struct dasd_ccw_req *); 855int dasd_term_IO(struct dasd_ccw_req *); 856void dasd_schedule_device_bh(struct dasd_device *); 857void dasd_schedule_block_bh(struct dasd_block *); 858int dasd_sleep_on(struct dasd_ccw_req *); 859int dasd_sleep_on_queue(struct list_head *); 860int dasd_sleep_on_immediatly(struct dasd_ccw_req *); 861int dasd_sleep_on_queue_interruptible(struct list_head *); 862int dasd_sleep_on_interruptible(struct dasd_ccw_req *); 863void dasd_device_set_timer(struct dasd_device *, int); 864void dasd_device_clear_timer(struct dasd_device *); 865void dasd_block_set_timer(struct dasd_block *, int); 866void dasd_block_clear_timer(struct dasd_block *); 867int dasd_cancel_req(struct dasd_ccw_req *); 868int dasd_flush_device_queue(struct dasd_device *); 869int dasd_generic_probe(struct ccw_device *); 870void dasd_generic_free_discipline(struct dasd_device *); 871void dasd_generic_remove (struct ccw_device *cdev); 872int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); 873int dasd_generic_set_offline (struct ccw_device *cdev); 874int dasd_generic_notify(struct ccw_device *, int); 875int dasd_generic_last_path_gone(struct dasd_device *); 876int dasd_generic_path_operational(struct dasd_device *); 877void dasd_generic_shutdown(struct ccw_device *); 878 879void dasd_generic_handle_state_change(struct dasd_device *); 880enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *); 881void dasd_generic_path_event(struct ccw_device *, int *); 882int dasd_generic_verify_path(struct dasd_device *, __u8); 883void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *); 884void dasd_generic_space_avail(struct dasd_device *); 885 886int dasd_generic_requeue_all_requests(struct dasd_device *); 887 888int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); 889char *dasd_get_sense(struct irb *); 890 891void dasd_device_set_stop_bits(struct dasd_device *, int); 892void dasd_device_remove_stop_bits(struct dasd_device *, int); 893 894int dasd_device_is_ro(struct dasd_device *); 895 896void dasd_profile_reset(struct dasd_profile *); 897int dasd_profile_on(struct dasd_profile *); 898void dasd_profile_off(struct dasd_profile *); 899char *dasd_get_user_string(const char __user *, size_t); 900 901/* externals in dasd_devmap.c */ 902extern int dasd_max_devindex; 903extern int dasd_probeonly; 904extern int dasd_autodetect; 905extern int dasd_nopav; 906extern int dasd_nofcx; 907 908int dasd_devmap_init(void); 909void dasd_devmap_exit(void); 910 911struct dasd_device *dasd_create_device(struct ccw_device *); 912void dasd_delete_device(struct dasd_device *); 913 914int dasd_get_feature(struct ccw_device *, int); 915int dasd_set_feature(struct ccw_device *, int, int); 916 917extern const struct attribute_group *dasd_dev_groups[]; 918void dasd_path_create_kobj(struct dasd_device *, int); 919void dasd_path_create_kobjects(struct dasd_device *); 920void dasd_path_remove_kobjects(struct dasd_device *); 921 922struct dasd_device *dasd_device_from_cdev(struct ccw_device *); 923struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *); 924struct dasd_device *dasd_device_from_devindex(int); 925 926void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *); 927struct dasd_device *dasd_device_from_gendisk(struct gendisk *); 928 929int dasd_parse(void) __init; 930int dasd_busid_known(const char *); 931 932/* externals in dasd_gendisk.c */ 933int dasd_gendisk_init(void); 934void dasd_gendisk_exit(void); 935int dasd_gendisk_alloc(struct dasd_block *); 936void dasd_gendisk_free(struct dasd_block *); 937int dasd_scan_partitions(struct dasd_block *); 938void dasd_destroy_partitions(struct dasd_block *); 939 940/* externals in dasd_ioctl.c */ 941int dasd_ioctl(struct block_device *bdev, blk_mode_t mode, unsigned int cmd, 942 unsigned long arg); 943int dasd_set_read_only(struct block_device *bdev, bool ro); 944 945/* externals in dasd_proc.c */ 946int dasd_proc_init(void); 947void dasd_proc_exit(void); 948 949/* externals in dasd_erp.c */ 950struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); 951struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); 952struct dasd_ccw_req *dasd_alloc_erp_request(unsigned int, int, int, 953 struct dasd_device *); 954void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); 955void dasd_log_sense(struct dasd_ccw_req *, struct irb *); 956void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb); 957 958/* externals in dasd_3990_erp.c */ 959struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); 960void dasd_3990_erp_handle_sim(struct dasd_device *, char *); 961 962/* externals in dasd_eer.c */ 963#ifdef CONFIG_DASD_EER 964int dasd_eer_init(void); 965void dasd_eer_exit(void); 966int dasd_eer_enable(struct dasd_device *); 967void dasd_eer_disable(struct dasd_device *); 968void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, 969 unsigned int id); 970void dasd_eer_snss(struct dasd_device *); 971 972static inline int dasd_eer_enabled(struct dasd_device *device) 973{ 974 return device->eer_cqr != NULL; 975} 976#else 977#define dasd_eer_init() (0) 978#define dasd_eer_exit() do { } while (0) 979#define dasd_eer_enable(d) (0) 980#define dasd_eer_disable(d) do { } while (0) 981#define dasd_eer_write(d,c,i) do { } while (0) 982#define dasd_eer_snss(d) do { } while (0) 983#define dasd_eer_enabled(d) (0) 984#endif /* CONFIG_DASD_ERR */ 985 986 987/* DASD path handling functions */ 988 989/* 990 * helper functions to modify bit masks for a given channel path for a device 991 */ 992static inline int dasd_path_is_operational(struct dasd_device *device, int chp) 993{ 994 return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 995} 996 997static inline int dasd_path_need_verify(struct dasd_device *device, int chp) 998{ 999 return test_bit(DASD_PATH_TBV, &device->path[chp].flags); 1000} 1001 1002static inline void dasd_path_verify(struct dasd_device *device, int chp) 1003{ 1004 __set_bit(DASD_PATH_TBV, &device->path[chp].flags); 1005} 1006 1007static inline void dasd_path_clear_verify(struct dasd_device *device, int chp) 1008{ 1009 __clear_bit(DASD_PATH_TBV, &device->path[chp].flags); 1010} 1011 1012static inline void dasd_path_clear_all_verify(struct dasd_device *device) 1013{ 1014 int chp; 1015 1016 for (chp = 0; chp < 8; chp++) 1017 dasd_path_clear_verify(device, chp); 1018} 1019 1020static inline void dasd_path_fcsec(struct dasd_device *device, int chp) 1021{ 1022 __set_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 1023} 1024 1025static inline void dasd_path_clear_fcsec(struct dasd_device *device, int chp) 1026{ 1027 __clear_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 1028} 1029 1030static inline int dasd_path_need_fcsec(struct dasd_device *device, int chp) 1031{ 1032 return test_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 1033} 1034 1035static inline void dasd_path_clear_all_fcsec(struct dasd_device *device) 1036{ 1037 int chp; 1038 1039 for (chp = 0; chp < 8; chp++) 1040 dasd_path_clear_fcsec(device, chp); 1041} 1042 1043static inline void dasd_path_operational(struct dasd_device *device, int chp) 1044{ 1045 __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 1046 device->opm |= (0x80 >> chp); 1047} 1048 1049static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp) 1050{ 1051 __set_bit(DASD_PATH_NPP, &device->path[chp].flags); 1052} 1053 1054static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp) 1055{ 1056 return test_bit(DASD_PATH_NPP, &device->path[chp].flags); 1057} 1058 1059static inline void dasd_path_clear_nonpreferred(struct dasd_device *device, 1060 int chp) 1061{ 1062 __clear_bit(DASD_PATH_NPP, &device->path[chp].flags); 1063} 1064 1065static inline void dasd_path_preferred(struct dasd_device *device, int chp) 1066{ 1067 __set_bit(DASD_PATH_PP, &device->path[chp].flags); 1068} 1069 1070static inline int dasd_path_is_preferred(struct dasd_device *device, int chp) 1071{ 1072 return test_bit(DASD_PATH_PP, &device->path[chp].flags); 1073} 1074 1075static inline void dasd_path_clear_preferred(struct dasd_device *device, 1076 int chp) 1077{ 1078 __clear_bit(DASD_PATH_PP, &device->path[chp].flags); 1079} 1080 1081static inline void dasd_path_clear_oper(struct dasd_device *device, int chp) 1082{ 1083 __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 1084 device->opm &= ~(0x80 >> chp); 1085} 1086 1087static inline void dasd_path_clear_cable(struct dasd_device *device, int chp) 1088{ 1089 __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1090} 1091 1092static inline void dasd_path_cuir(struct dasd_device *device, int chp) 1093{ 1094 __set_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1095} 1096 1097static inline int dasd_path_is_cuir(struct dasd_device *device, int chp) 1098{ 1099 return test_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1100} 1101 1102static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp) 1103{ 1104 __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1105} 1106 1107static inline void dasd_path_ifcc(struct dasd_device *device, int chp) 1108{ 1109 set_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1110} 1111 1112static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp) 1113{ 1114 return test_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1115} 1116 1117static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp) 1118{ 1119 clear_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1120} 1121 1122static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp) 1123{ 1124 __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1125} 1126 1127static inline void dasd_path_miscabled(struct dasd_device *device, int chp) 1128{ 1129 __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1130} 1131 1132static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp) 1133{ 1134 return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1135} 1136 1137static inline void dasd_path_nohpf(struct dasd_device *device, int chp) 1138{ 1139 __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1140} 1141 1142static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp) 1143{ 1144 return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1145} 1146 1147/* 1148 * get functions for path masks 1149 * will return a path masks for the given device 1150 */ 1151 1152static inline __u8 dasd_path_get_opm(struct dasd_device *device) 1153{ 1154 return device->opm; 1155} 1156 1157static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device) 1158{ 1159 int chp; 1160 __u8 tbvpm = 0x00; 1161 1162 for (chp = 0; chp < 8; chp++) 1163 if (dasd_path_need_verify(device, chp)) 1164 tbvpm |= 0x80 >> chp; 1165 return tbvpm; 1166} 1167 1168static inline int dasd_path_get_fcsecpm(struct dasd_device *device) 1169{ 1170 int chp; 1171 1172 for (chp = 0; chp < 8; chp++) 1173 if (dasd_path_need_fcsec(device, chp)) 1174 return 1; 1175 1176 return 0; 1177} 1178 1179static inline __u8 dasd_path_get_nppm(struct dasd_device *device) 1180{ 1181 int chp; 1182 __u8 npm = 0x00; 1183 1184 for (chp = 0; chp < 8; chp++) { 1185 if (dasd_path_is_nonpreferred(device, chp)) 1186 npm |= 0x80 >> chp; 1187 } 1188 return npm; 1189} 1190 1191static inline __u8 dasd_path_get_ppm(struct dasd_device *device) 1192{ 1193 int chp; 1194 __u8 ppm = 0x00; 1195 1196 for (chp = 0; chp < 8; chp++) 1197 if (dasd_path_is_preferred(device, chp)) 1198 ppm |= 0x80 >> chp; 1199 return ppm; 1200} 1201 1202static inline __u8 dasd_path_get_cablepm(struct dasd_device *device) 1203{ 1204 int chp; 1205 __u8 cablepm = 0x00; 1206 1207 for (chp = 0; chp < 8; chp++) 1208 if (dasd_path_is_miscabled(device, chp)) 1209 cablepm |= 0x80 >> chp; 1210 return cablepm; 1211} 1212 1213static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device) 1214{ 1215 int chp; 1216 __u8 cuirpm = 0x00; 1217 1218 for (chp = 0; chp < 8; chp++) 1219 if (dasd_path_is_cuir(device, chp)) 1220 cuirpm |= 0x80 >> chp; 1221 return cuirpm; 1222} 1223 1224static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device) 1225{ 1226 int chp; 1227 __u8 ifccpm = 0x00; 1228 1229 for (chp = 0; chp < 8; chp++) 1230 if (dasd_path_is_ifcc(device, chp)) 1231 ifccpm |= 0x80 >> chp; 1232 return ifccpm; 1233} 1234 1235static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device) 1236{ 1237 int chp; 1238 __u8 hpfpm = 0x00; 1239 1240 for (chp = 0; chp < 8; chp++) 1241 if (dasd_path_is_nohpf(device, chp)) 1242 hpfpm |= 0x80 >> chp; 1243 return hpfpm; 1244} 1245 1246static inline u8 dasd_path_get_fcs_path(struct dasd_device *device, int chp) 1247{ 1248 return device->path[chp].fc_security; 1249} 1250 1251static inline int dasd_path_get_fcs_device(struct dasd_device *device) 1252{ 1253 u8 fc_sec = 0; 1254 int chp; 1255 1256 for (chp = 0; chp < 8; chp++) { 1257 if (device->opm & (0x80 >> chp)) { 1258 fc_sec = device->path[chp].fc_security; 1259 break; 1260 } 1261 } 1262 for (; chp < 8; chp++) { 1263 if (device->opm & (0x80 >> chp)) 1264 if (device->path[chp].fc_security != fc_sec) 1265 return -EINVAL; 1266 } 1267 1268 return fc_sec; 1269} 1270 1271/* 1272 * add functions for path masks 1273 * the existing path mask will be extended by the given path mask 1274 */ 1275static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm) 1276{ 1277 int chp; 1278 1279 for (chp = 0; chp < 8; chp++) 1280 if (pm & (0x80 >> chp)) 1281 dasd_path_verify(device, chp); 1282} 1283 1284static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device) 1285{ 1286 int chp; 1287 __u8 nopm = 0x00; 1288 1289 for (chp = 0; chp < 8; chp++) 1290 if (dasd_path_is_nohpf(device, chp) || 1291 dasd_path_is_ifcc(device, chp) || 1292 dasd_path_is_cuir(device, chp) || 1293 dasd_path_is_miscabled(device, chp)) 1294 nopm |= 0x80 >> chp; 1295 return nopm; 1296} 1297 1298static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm) 1299{ 1300 int chp; 1301 1302 for (chp = 0; chp < 8; chp++) 1303 if (pm & (0x80 >> chp)) { 1304 dasd_path_operational(device, chp); 1305 /* 1306 * if the path is used 1307 * it should not be in one of the negative lists 1308 */ 1309 dasd_path_clear_nohpf(device, chp); 1310 dasd_path_clear_cuir(device, chp); 1311 dasd_path_clear_cable(device, chp); 1312 dasd_path_clear_ifcc(device, chp); 1313 } 1314} 1315 1316static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm) 1317{ 1318 int chp; 1319 1320 for (chp = 0; chp < 8; chp++) 1321 if (pm & (0x80 >> chp)) 1322 dasd_path_miscabled(device, chp); 1323} 1324 1325static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm) 1326{ 1327 int chp; 1328 1329 for (chp = 0; chp < 8; chp++) 1330 if (pm & (0x80 >> chp)) 1331 dasd_path_cuir(device, chp); 1332} 1333 1334static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm) 1335{ 1336 int chp; 1337 1338 for (chp = 0; chp < 8; chp++) 1339 if (pm & (0x80 >> chp)) 1340 dasd_path_ifcc(device, chp); 1341} 1342 1343static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm) 1344{ 1345 int chp; 1346 1347 for (chp = 0; chp < 8; chp++) 1348 if (pm & (0x80 >> chp)) 1349 dasd_path_nonpreferred(device, chp); 1350} 1351 1352static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm) 1353{ 1354 int chp; 1355 1356 for (chp = 0; chp < 8; chp++) 1357 if (pm & (0x80 >> chp)) 1358 dasd_path_nohpf(device, chp); 1359} 1360 1361static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm) 1362{ 1363 int chp; 1364 1365 for (chp = 0; chp < 8; chp++) 1366 if (pm & (0x80 >> chp)) 1367 dasd_path_preferred(device, chp); 1368} 1369 1370static inline void dasd_path_add_fcsecpm(struct dasd_device *device, __u8 pm) 1371{ 1372 int chp; 1373 1374 for (chp = 0; chp < 8; chp++) 1375 if (pm & (0x80 >> chp)) 1376 dasd_path_fcsec(device, chp); 1377} 1378 1379/* 1380 * set functions for path masks 1381 * the existing path mask will be replaced by the given path mask 1382 */ 1383static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm) 1384{ 1385 int chp; 1386 1387 for (chp = 0; chp < 8; chp++) 1388 if (pm & (0x80 >> chp)) 1389 dasd_path_verify(device, chp); 1390 else 1391 dasd_path_clear_verify(device, chp); 1392} 1393 1394static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm) 1395{ 1396 int chp; 1397 1398 for (chp = 0; chp < 8; chp++) { 1399 dasd_path_clear_oper(device, chp); 1400 if (pm & (0x80 >> chp)) { 1401 dasd_path_operational(device, chp); 1402 /* 1403 * if the path is used 1404 * it should not be in one of the negative lists 1405 */ 1406 dasd_path_clear_nohpf(device, chp); 1407 dasd_path_clear_cuir(device, chp); 1408 dasd_path_clear_cable(device, chp); 1409 dasd_path_clear_ifcc(device, chp); 1410 } 1411 } 1412} 1413 1414/* 1415 * remove functions for path masks 1416 * the existing path mask will be cleared with the given path mask 1417 */ 1418static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm) 1419{ 1420 int chp; 1421 1422 for (chp = 0; chp < 8; chp++) { 1423 if (pm & (0x80 >> chp)) 1424 dasd_path_clear_oper(device, chp); 1425 } 1426} 1427 1428/* 1429 * add the newly available path to the to be verified pm and remove it from 1430 * normal operation until it is verified 1431 */ 1432static inline void dasd_path_available(struct dasd_device *device, int chp) 1433{ 1434 dasd_path_clear_oper(device, chp); 1435 dasd_path_verify(device, chp); 1436} 1437 1438static inline void dasd_path_notoper(struct dasd_device *device, int chp) 1439{ 1440 dasd_path_clear_oper(device, chp); 1441 dasd_path_clear_preferred(device, chp); 1442 dasd_path_clear_nonpreferred(device, chp); 1443} 1444 1445static inline void dasd_path_fcsec_update(struct dasd_device *device, int chp) 1446{ 1447 dasd_path_fcsec(device, chp); 1448} 1449 1450/* 1451 * remove all paths from normal operation 1452 */ 1453static inline void dasd_path_no_path(struct dasd_device *device) 1454{ 1455 int chp; 1456 1457 for (chp = 0; chp < 8; chp++) 1458 dasd_path_notoper(device, chp); 1459 1460 dasd_path_clear_all_verify(device); 1461} 1462 1463/* end - path handling */ 1464 1465#endif /* DASD_H */ 1466