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 */ 69 struct dasd_device; 70 struct dasd_block; 71 72 /* BIT DEFINITIONS FOR SENSE DATA */ 73 #define DASD_SENSE_BIT_0 0x80 74 #define DASD_SENSE_BIT_1 0x40 75 #define DASD_SENSE_BIT_2 0x20 76 #define DASD_SENSE_BIT_3 0x10 77 78 /* BIT DEFINITIONS FOR SIM SENSE */ 79 #define DASD_SIM_SENSE 0x0F 80 #define DASD_SIM_MSG_TO_OP 0x03 81 #define DASD_SIM_LOG 0x0C 82 83 /* lock class for nested cdev lock */ 84 #define CDEV_NESTED_FIRST 1 85 #define CDEV_NESTED_SECOND 2 86 87 /* 88 * SECTION: MACROs for klogd and s390 debug feature (dbf) 89 */ 90 #define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \ 91 do { \ 92 debug_sprintf_event(d_device->debug_area, \ 93 d_level, \ 94 d_str "\n", \ 95 d_data); \ 96 } while(0) 97 98 #define DBF_EVENT(d_level, d_str, d_data...)\ 99 do { \ 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...) \ 107 do { \ 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 /* limit size for an errorstring */ 117 #define ERRORLENGTH 30 118 119 /* definition of dbf debug levels */ 120 #define DBF_EMERG 0 /* system is unusable */ 121 #define DBF_ALERT 1 /* action must be taken immediately */ 122 #define DBF_CRIT 2 /* critical conditions */ 123 #define DBF_ERR 3 /* error conditions */ 124 #define DBF_WARNING 4 /* warning conditions */ 125 #define DBF_NOTICE 5 /* normal but significant condition */ 126 #define DBF_INFO 6 /* informational */ 127 #define DBF_DEBUG 6 /* debug-level messages */ 128 129 /* messages to be written via klogd and dbf */ 130 #define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\ 131 do { \ 132 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ 133 dev_name(&d_device->cdev->dev), d_args); \ 134 DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \ 135 } while(0) 136 137 #define MESSAGE(d_loglevel,d_string,d_args...)\ 138 do { \ 139 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ 140 DBF_EVENT(DBF_ALERT, d_string, d_args); \ 141 } while(0) 142 143 /* messages to be written via klogd only */ 144 #define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\ 145 do { \ 146 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ 147 dev_name(&d_device->cdev->dev), d_args); \ 148 } while(0) 149 150 #define MESSAGE_LOG(d_loglevel,d_string,d_args...)\ 151 do { \ 152 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ 153 } while(0) 154 155 /* Macro to calculate number of blocks per page */ 156 #define BLOCKS_PER_PAGE(blksize) (PAGE_SIZE / blksize) 157 158 struct dasd_ccw_req { 159 unsigned int magic; /* Eye catcher */ 160 int intrc; /* internal error, e.g. from start_IO */ 161 struct list_head devlist; /* for dasd_device request queue */ 162 struct list_head blocklist; /* for dasd_block request queue */ 163 struct dasd_block *block; /* the originating block device */ 164 struct dasd_device *memdev; /* the device used to allocate this */ 165 struct dasd_device *startdev; /* device the request is started on */ 166 struct dasd_device *basedev; /* base device if no block->base */ 167 void *cpaddr; /* address of ccw or tcw */ 168 short retries; /* A retry counter */ 169 unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */ 170 char status; /* status of this request */ 171 char lpm; /* logical path mask */ 172 unsigned long flags; /* flags of this request */ 173 struct dasd_queue *dq; 174 unsigned long starttime; /* jiffies time of request start */ 175 unsigned long expires; /* expiration period in jiffies */ 176 void *data; /* pointer to data area */ 177 struct irb irb; /* device status in case of an error */ 178 struct dasd_ccw_req *refers; /* ERP-chain queueing. */ 179 void *function; /* originating ERP action */ 180 void *mem_chunk; 181 182 unsigned long buildclk; /* TOD-clock of request generation */ 183 unsigned long startclk; /* TOD-clock of request start */ 184 unsigned long stopclk; /* TOD-clock of request interrupt */ 185 unsigned long endclk; /* TOD-clock of request termination */ 186 187 void (*callback)(struct dasd_ccw_req *, void *data); 188 void *callback_data; 189 unsigned int proc_bytes; /* bytes for partial completion */ 190 }; 191 192 /* 193 * dasd_ccw_req -> status can be: 194 */ 195 #define DASD_CQR_FILLED 0x00 /* request is ready to be processed */ 196 #define DASD_CQR_DONE 0x01 /* request is completed successfully */ 197 #define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */ 198 #define DASD_CQR_IN_ERP 0x03 /* request is in recovery */ 199 #define DASD_CQR_FAILED 0x04 /* request is finally failed */ 200 #define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */ 201 202 #define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */ 203 #define DASD_CQR_IN_IO 0x81 /* request is currently in IO */ 204 #define DASD_CQR_ERROR 0x82 /* request is completed with error */ 205 #define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */ 206 #define DASD_CQR_CLEARED 0x84 /* request was cleared */ 207 #define DASD_CQR_SUCCESS 0x85 /* request was successful */ 208 209 /* default expiration time*/ 210 #define DASD_EXPIRES 300 211 #define DASD_EXPIRES_MAX 40000000 212 #define DASD_RETRIES 256 213 #define DASD_RETRIES_MAX 32768 214 215 /* per dasd_ccw_req flags */ 216 #define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */ 217 #define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */ 218 #define DASD_CQR_VERIFY_PATH 2 /* path verification request */ 219 #define DASD_CQR_ALLOW_SLOCK 3 /* Try this request even when lock was 220 * stolen. Should not be combined with 221 * DASD_CQR_FLAGS_USE_ERP 222 */ 223 /* 224 * The following flags are used to suppress output of certain errors. 225 */ 226 #define DASD_CQR_SUPPRESS_NRF 4 /* Suppress 'No Record Found' error */ 227 #define DASD_CQR_SUPPRESS_FP 5 /* Suppress 'File Protected' error*/ 228 #define DASD_CQR_SUPPRESS_IL 6 /* Suppress 'Incorrect Length' error */ 229 #define DASD_CQR_SUPPRESS_CR 7 /* Suppress 'Command Reject' error */ 230 231 #define DASD_REQ_PER_DEV 4 232 233 /* Signature for error recovery functions. */ 234 typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *); 235 236 /* 237 * A single CQR can only contain a maximum of 255 CCWs. It is limited by 238 * the locate record and locate record extended count value which can only hold 239 * 1 Byte max. 240 */ 241 #define DASD_CQR_MAX_CCW 255 242 243 /* 244 * Unique identifier for dasd device. 245 */ 246 #define UA_NOT_CONFIGURED 0x00 247 #define UA_BASE_DEVICE 0x01 248 #define UA_BASE_PAV_ALIAS 0x02 249 #define UA_HYPER_PAV_ALIAS 0x03 250 251 struct dasd_uid { 252 __u8 type; 253 char vendor[4]; 254 char serial[15]; 255 __u16 ssid; 256 __u8 real_unit_addr; 257 __u8 base_unit_addr; 258 char vduit[33]; 259 }; 260 261 /* 262 * the struct dasd_discipline is 263 * sth like a table of virtual functions, if you think of dasd_eckd 264 * inheriting dasd... 265 * no, currently we are not planning to reimplement the driver in C++ 266 */ 267 struct dasd_discipline { 268 struct module *owner; 269 char ebcname[8]; /* a name used for tagging and printks */ 270 char name[8]; /* a name used for tagging and printks */ 271 272 struct list_head list; /* used for list of disciplines */ 273 274 /* 275 * Device recognition functions. check_device is used to verify 276 * the sense data and the information returned by read device 277 * characteristics. It returns 0 if the discipline can be used 278 * for the device in question. uncheck_device is called during 279 * device shutdown to deregister a device from its discipline. 280 */ 281 int (*check_device) (struct dasd_device *); 282 void (*uncheck_device) (struct dasd_device *); 283 284 /* 285 * do_analysis is used in the step from device state "basic" to 286 * state "accept". It returns 0 if the device can be made ready, 287 * it returns -EMEDIUMTYPE if the device can't be made ready or 288 * -EAGAIN if do_analysis started a ccw that needs to complete 289 * before the analysis may be repeated. 290 */ 291 int (*do_analysis) (struct dasd_block *); 292 293 /* 294 * This function is called, when new paths become available. 295 * Disciplins may use this callback to do necessary setup work, 296 * e.g. verify that new path is compatible with the current 297 * configuration. 298 */ 299 int (*pe_handler)(struct dasd_device *, __u8, __u8); 300 301 /* 302 * Last things to do when a device is set online, and first things 303 * when it is set offline. 304 */ 305 int (*basic_to_ready) (struct dasd_device *); 306 int (*online_to_ready) (struct dasd_device *); 307 int (*basic_to_known)(struct dasd_device *); 308 309 /* 310 * Initialize block layer request queue. 311 */ 312 void (*setup_blk_queue)(struct dasd_block *); 313 /* (struct dasd_device *); 314 * Device operation functions. build_cp creates a ccw chain for 315 * a block device request, start_io starts the request and 316 * term_IO cancels it (e.g. in case of a timeout). format_device 317 * formats the device and check_device_format compares the format of 318 * a device with the expected format_data. 319 * handle_terminated_request allows to examine a cqr and prepare 320 * it for retry. 321 */ 322 struct dasd_ccw_req *(*build_cp) (struct dasd_device *, 323 struct dasd_block *, 324 struct request *); 325 int (*start_IO) (struct dasd_ccw_req *); 326 int (*term_IO) (struct dasd_ccw_req *); 327 void (*handle_terminated_request) (struct dasd_ccw_req *); 328 int (*format_device) (struct dasd_device *, 329 struct format_data_t *, int); 330 int (*check_device_format)(struct dasd_device *, 331 struct format_check_t *, int); 332 int (*free_cp) (struct dasd_ccw_req *, struct request *); 333 334 /* 335 * Error recovery functions. examine_error() returns a value that 336 * indicates what to do for an error condition. If examine_error() 337 * returns 'dasd_era_recover' erp_action() is called to create a 338 * special error recovery ccw. erp_postaction() is called after 339 * an error recovery ccw has finished its execution. dump_sense 340 * is called for every error condition to print the sense data 341 * to the console. 342 */ 343 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); 344 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); 345 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, 346 struct irb *); 347 void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *); 348 void (*check_for_device_change) (struct dasd_device *, 349 struct dasd_ccw_req *, 350 struct irb *); 351 352 /* i/o control functions. */ 353 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *); 354 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); 355 int (*ioctl) (struct dasd_block *, unsigned int, void __user *); 356 357 /* reload device after state change */ 358 int (*reload) (struct dasd_device *); 359 360 int (*get_uid) (struct dasd_device *, struct dasd_uid *); 361 void (*kick_validate) (struct dasd_device *); 362 int (*check_attention)(struct dasd_device *, __u8); 363 int (*host_access_count)(struct dasd_device *); 364 int (*hosts_print)(struct dasd_device *, struct seq_file *); 365 void (*handle_hpf_error)(struct dasd_device *, struct irb *); 366 void (*disable_hpf)(struct dasd_device *); 367 int (*hpf_enabled)(struct dasd_device *); 368 void (*reset_path)(struct dasd_device *, __u8); 369 370 /* 371 * Extent Space Efficient (ESE) relevant functions 372 */ 373 int (*is_ese)(struct dasd_device *); 374 /* Capacity */ 375 int (*space_allocated)(struct dasd_device *); 376 int (*space_configured)(struct dasd_device *); 377 int (*logical_capacity)(struct dasd_device *); 378 int (*release_space)(struct dasd_device *, struct format_data_t *); 379 /* Extent Pool */ 380 int (*ext_pool_id)(struct dasd_device *); 381 int (*ext_size)(struct dasd_device *); 382 int (*ext_pool_cap_at_warnlevel)(struct dasd_device *); 383 int (*ext_pool_warn_thrshld)(struct dasd_device *); 384 int (*ext_pool_oos)(struct dasd_device *); 385 int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *); 386 struct dasd_ccw_req *(*ese_format)(struct dasd_device *, 387 struct dasd_ccw_req *, struct irb *); 388 int (*ese_read)(struct dasd_ccw_req *, struct irb *); 389 }; 390 391 extern struct dasd_discipline *dasd_diag_discipline_pointer; 392 393 /* 394 * Notification numbers for extended error reporting notifications: 395 * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's 396 * eer pointer) is freed. The error reporting module needs to do all necessary 397 * cleanup steps. 398 * The DASD_EER_TRIGGER notification sends the actual error reports (triggers). 399 */ 400 #define DASD_EER_DISABLE 0 401 #define DASD_EER_TRIGGER 1 402 403 /* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */ 404 #define DASD_EER_FATALERROR 1 405 #define DASD_EER_NOPATH 2 406 #define DASD_EER_STATECHANGE 3 407 #define DASD_EER_PPRCSUSPEND 4 408 #define DASD_EER_NOSPC 5 409 410 /* DASD path handling */ 411 412 #define DASD_PATH_OPERATIONAL 1 413 #define DASD_PATH_TBV 2 414 #define DASD_PATH_PP 3 415 #define DASD_PATH_NPP 4 416 #define DASD_PATH_MISCABLED 5 417 #define DASD_PATH_NOHPF 6 418 #define DASD_PATH_CUIR 7 419 #define DASD_PATH_IFCC 8 420 #define DASD_PATH_FCSEC 9 421 422 #define DASD_THRHLD_MAX 4294967295U 423 #define DASD_INTERVAL_MAX 4294967295U 424 425 /* FC Endpoint Security Capabilities */ 426 #define DASD_FC_SECURITY_UNSUP 0 427 #define DASD_FC_SECURITY_AUTH 1 428 #define DASD_FC_SECURITY_ENC_FCSP2 2 429 #define DASD_FC_SECURITY_ENC_ERAS 3 430 431 #define DASD_FC_SECURITY_ENC_STR "Encryption" 432 static const struct { 433 u8 value; 434 char *name; 435 } dasd_path_fcs_mnemonics[] = { 436 { DASD_FC_SECURITY_UNSUP, "Unsupported" }, 437 { DASD_FC_SECURITY_AUTH, "Authentication" }, 438 { DASD_FC_SECURITY_ENC_FCSP2, DASD_FC_SECURITY_ENC_STR }, 439 { DASD_FC_SECURITY_ENC_ERAS, DASD_FC_SECURITY_ENC_STR }, 440 }; 441 442 static inline char *dasd_path_get_fcs_str(int val) 443 { 444 int i; 445 446 for (i = 0; i < ARRAY_SIZE(dasd_path_fcs_mnemonics); i++) { 447 if (dasd_path_fcs_mnemonics[i].value == val) 448 return dasd_path_fcs_mnemonics[i].name; 449 } 450 451 return dasd_path_fcs_mnemonics[0].name; 452 } 453 454 struct dasd_path { 455 unsigned long flags; 456 u8 cssid; 457 u8 ssid; 458 u8 chpid; 459 struct dasd_conf_data *conf_data; 460 atomic_t error_count; 461 unsigned long errorclk; 462 u8 fc_security; 463 struct kobject kobj; 464 bool in_sysfs; 465 }; 466 467 #define to_dasd_path(path) container_of(path, struct dasd_path, kobj) 468 469 static inline void dasd_path_release(struct kobject *kobj) 470 { 471 /* Memory for the dasd_path kobject is freed when dasd_free_device() is called */ 472 } 473 474 475 struct dasd_profile_info { 476 /* legacy part of profile data, as in dasd_profile_info_t */ 477 unsigned int dasd_io_reqs; /* number of requests processed */ 478 unsigned int dasd_io_sects; /* number of sectors processed */ 479 unsigned int dasd_io_secs[32]; /* histogram of request's sizes */ 480 unsigned int dasd_io_times[32]; /* histogram of requests's times */ 481 unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */ 482 unsigned int dasd_io_time1[32]; /* hist. of time from build to start */ 483 unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */ 484 unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */ 485 unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */ 486 unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */ 487 488 /* new data */ 489 struct timespec64 starttod; /* time of start or last reset */ 490 unsigned int dasd_io_alias; /* requests using an alias */ 491 unsigned int dasd_io_tpm; /* requests using transport mode */ 492 unsigned int dasd_read_reqs; /* total number of read requests */ 493 unsigned int dasd_read_sects; /* total number read sectors */ 494 unsigned int dasd_read_alias; /* read request using an alias */ 495 unsigned int dasd_read_tpm; /* read requests in transport mode */ 496 unsigned int dasd_read_secs[32]; /* histogram of request's sizes */ 497 unsigned int dasd_read_times[32]; /* histogram of requests's times */ 498 unsigned int dasd_read_time1[32]; /* hist. time from build to start */ 499 unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */ 500 unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */ 501 unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */ 502 unsigned long dasd_sum_times; /* sum of request times */ 503 unsigned long dasd_sum_time_str; /* sum of time from build to start */ 504 unsigned long dasd_sum_time_irq; /* sum of time from start to irq */ 505 unsigned long dasd_sum_time_end; /* sum of time from irq to end */ 506 }; 507 508 struct dasd_profile { 509 struct dentry *dentry; 510 struct dasd_profile_info *data; 511 spinlock_t lock; 512 }; 513 514 struct dasd_format_entry { 515 struct list_head list; 516 sector_t track; 517 }; 518 519 struct dasd_device { 520 /* Block device stuff. */ 521 struct dasd_block *block; 522 523 unsigned int devindex; 524 unsigned long flags; /* per device flags */ 525 unsigned short features; /* copy of devmap-features (read-only!) */ 526 527 /* extended error reporting stuff (eer) */ 528 struct dasd_ccw_req *eer_cqr; 529 530 /* Device discipline stuff. */ 531 struct dasd_discipline *discipline; 532 struct dasd_discipline *base_discipline; 533 void *private; 534 struct dasd_path path[8]; 535 __u8 opm; 536 537 /* Device state and target state. */ 538 int state, target; 539 struct mutex state_mutex; 540 int stopped; /* device (ccw_device_start) was stopped */ 541 542 /* reference count. */ 543 atomic_t ref_count; 544 545 /* ccw queue and memory for static ccw/erp buffers. */ 546 struct list_head ccw_queue; 547 spinlock_t mem_lock; 548 void *ccw_mem; 549 void *erp_mem; 550 void *ese_mem; 551 struct list_head ccw_chunks; 552 struct list_head erp_chunks; 553 struct list_head ese_chunks; 554 555 atomic_t tasklet_scheduled; 556 struct tasklet_struct tasklet; 557 struct work_struct kick_work; 558 struct work_struct reload_device; 559 struct work_struct kick_validate; 560 struct work_struct suc_work; 561 struct work_struct requeue_requests; 562 struct timer_list timer; 563 564 debug_info_t *debug_area; 565 566 struct ccw_device *cdev; 567 568 /* hook for alias management */ 569 struct list_head alias_list; 570 571 /* default expiration time in s */ 572 unsigned long default_expires; 573 unsigned long default_retries; 574 575 unsigned long blk_timeout; 576 577 unsigned long path_thrhld; 578 unsigned long path_interval; 579 580 struct dentry *debugfs_dentry; 581 struct dentry *hosts_dentry; 582 struct dasd_profile profile; 583 struct dasd_format_entry format_entry; 584 struct kset *paths_info; 585 }; 586 587 struct dasd_block { 588 /* Block device stuff. */ 589 struct gendisk *gdp; 590 struct request_queue *request_queue; 591 spinlock_t request_queue_lock; 592 struct blk_mq_tag_set tag_set; 593 struct block_device *bdev; 594 atomic_t open_count; 595 596 unsigned long blocks; /* size of volume in blocks */ 597 unsigned int bp_block; /* bytes per block */ 598 unsigned int s2b_shift; /* log2 (bp_block/512) */ 599 600 struct dasd_device *base; 601 struct list_head ccw_queue; 602 spinlock_t queue_lock; 603 604 atomic_t tasklet_scheduled; 605 struct tasklet_struct tasklet; 606 struct timer_list timer; 607 608 struct dentry *debugfs_dentry; 609 struct dasd_profile profile; 610 611 struct list_head format_list; 612 spinlock_t format_lock; 613 }; 614 615 struct dasd_attention_data { 616 struct dasd_device *device; 617 __u8 lpum; 618 }; 619 620 struct dasd_queue { 621 spinlock_t lock; 622 }; 623 624 /* reasons why device (ccw_device_start) was stopped */ 625 #define DASD_STOPPED_NOT_ACC 1 /* not accessible */ 626 #define DASD_STOPPED_QUIESCE 2 /* Quiesced */ 627 #define DASD_STOPPED_PENDING 4 /* long busy */ 628 #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ 629 #define DASD_STOPPED_SU 16 /* summary unit check handling */ 630 #define DASD_STOPPED_NOSPC 128 /* no space left */ 631 632 /* per device flags */ 633 #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ 634 #define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ 635 #define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ 636 #define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't 637 * confuse this with the user specified 638 * read-only feature. 639 */ 640 #define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */ 641 #define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */ 642 #define DASD_FLAG_SUSPENDED 9 /* The device was suspended */ 643 #define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/ 644 #define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */ 645 #define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */ 646 #define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */ 647 #define DASD_FLAG_SUC 14 /* unhandled summary unit check */ 648 649 #define DASD_SLEEPON_START_TAG ((void *) 1) 650 #define DASD_SLEEPON_END_TAG ((void *) 2) 651 652 void dasd_put_device_wake(struct dasd_device *); 653 654 /* 655 * Reference count inliners 656 */ 657 static inline void 658 dasd_get_device(struct dasd_device *device) 659 { 660 atomic_inc(&device->ref_count); 661 } 662 663 static inline void 664 dasd_put_device(struct dasd_device *device) 665 { 666 if (atomic_dec_return(&device->ref_count) == 0) 667 dasd_put_device_wake(device); 668 } 669 670 /* 671 * The static memory in ccw_mem and erp_mem is managed by a sorted 672 * list of free memory chunks. 673 */ 674 struct dasd_mchunk 675 { 676 struct list_head list; 677 unsigned long size; 678 } __attribute__ ((aligned(8))); 679 680 static inline void 681 dasd_init_chunklist(struct list_head *chunk_list, void *mem, 682 unsigned long size) 683 { 684 struct dasd_mchunk *chunk; 685 686 INIT_LIST_HEAD(chunk_list); 687 chunk = (struct dasd_mchunk *) mem; 688 chunk->size = size - sizeof(struct dasd_mchunk); 689 list_add(&chunk->list, chunk_list); 690 } 691 692 static inline void * 693 dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size) 694 { 695 struct dasd_mchunk *chunk, *tmp; 696 697 size = (size + 7L) & -8L; 698 list_for_each_entry(chunk, chunk_list, list) { 699 if (chunk->size < size) 700 continue; 701 if (chunk->size > size + sizeof(struct dasd_mchunk)) { 702 char *endaddr = (char *) (chunk + 1) + chunk->size; 703 tmp = (struct dasd_mchunk *) (endaddr - size) - 1; 704 tmp->size = size; 705 chunk->size -= size + sizeof(struct dasd_mchunk); 706 chunk = tmp; 707 } else 708 list_del(&chunk->list); 709 return (void *) (chunk + 1); 710 } 711 return NULL; 712 } 713 714 static inline void 715 dasd_free_chunk(struct list_head *chunk_list, void *mem) 716 { 717 struct dasd_mchunk *chunk, *tmp; 718 struct list_head *p, *left; 719 720 chunk = (struct dasd_mchunk *) 721 ((char *) mem - sizeof(struct dasd_mchunk)); 722 /* Find out the left neighbour in chunk_list. */ 723 left = chunk_list; 724 list_for_each(p, chunk_list) { 725 if (list_entry(p, struct dasd_mchunk, list) > chunk) 726 break; 727 left = p; 728 } 729 /* Try to merge with right neighbour = next element from left. */ 730 if (left->next != chunk_list) { 731 tmp = list_entry(left->next, struct dasd_mchunk, list); 732 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) { 733 list_del(&tmp->list); 734 chunk->size += tmp->size + sizeof(struct dasd_mchunk); 735 } 736 } 737 /* Try to merge with left neighbour. */ 738 if (left != chunk_list) { 739 tmp = list_entry(left, struct dasd_mchunk, list); 740 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) { 741 tmp->size += chunk->size + sizeof(struct dasd_mchunk); 742 return; 743 } 744 } 745 __list_add(&chunk->list, left, left->next); 746 } 747 748 /* 749 * Check if bsize is in { 512, 1024, 2048, 4096 } 750 */ 751 static inline int 752 dasd_check_blocksize(int bsize) 753 { 754 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize)) 755 return -EMEDIUMTYPE; 756 return 0; 757 } 758 759 /* externals in dasd.c */ 760 #define DASD_PROFILE_OFF 0 761 #define DASD_PROFILE_ON 1 762 #define DASD_PROFILE_GLOBAL_ONLY 2 763 764 extern debug_info_t *dasd_debug_area; 765 extern struct dasd_profile dasd_global_profile; 766 extern unsigned int dasd_global_profile_level; 767 extern const struct block_device_operations dasd_device_operations; 768 769 extern struct kmem_cache *dasd_page_cache; 770 771 struct dasd_ccw_req * 772 dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *); 773 struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *); 774 void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); 775 void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *); 776 void dasd_wakeup_cb(struct dasd_ccw_req *, void *); 777 778 struct dasd_device *dasd_alloc_device(void); 779 void dasd_free_device(struct dasd_device *); 780 781 struct dasd_block *dasd_alloc_block(void); 782 void dasd_free_block(struct dasd_block *); 783 784 enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved); 785 786 void dasd_enable_device(struct dasd_device *); 787 void dasd_set_target_state(struct dasd_device *, int); 788 void dasd_kick_device(struct dasd_device *); 789 void dasd_reload_device(struct dasd_device *); 790 void dasd_schedule_requeue(struct dasd_device *); 791 792 void dasd_add_request_head(struct dasd_ccw_req *); 793 void dasd_add_request_tail(struct dasd_ccw_req *); 794 int dasd_start_IO(struct dasd_ccw_req *); 795 int dasd_term_IO(struct dasd_ccw_req *); 796 void dasd_schedule_device_bh(struct dasd_device *); 797 void dasd_schedule_block_bh(struct dasd_block *); 798 int dasd_sleep_on(struct dasd_ccw_req *); 799 int dasd_sleep_on_queue(struct list_head *); 800 int dasd_sleep_on_immediatly(struct dasd_ccw_req *); 801 int dasd_sleep_on_queue_interruptible(struct list_head *); 802 int dasd_sleep_on_interruptible(struct dasd_ccw_req *); 803 void dasd_device_set_timer(struct dasd_device *, int); 804 void dasd_device_clear_timer(struct dasd_device *); 805 void dasd_block_set_timer(struct dasd_block *, int); 806 void dasd_block_clear_timer(struct dasd_block *); 807 int dasd_cancel_req(struct dasd_ccw_req *); 808 int dasd_flush_device_queue(struct dasd_device *); 809 int dasd_generic_probe(struct ccw_device *); 810 void dasd_generic_free_discipline(struct dasd_device *); 811 void dasd_generic_remove (struct ccw_device *cdev); 812 int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); 813 int dasd_generic_set_offline (struct ccw_device *cdev); 814 int dasd_generic_notify(struct ccw_device *, int); 815 int dasd_generic_last_path_gone(struct dasd_device *); 816 int dasd_generic_path_operational(struct dasd_device *); 817 void dasd_generic_shutdown(struct ccw_device *); 818 819 void dasd_generic_handle_state_change(struct dasd_device *); 820 enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *); 821 void dasd_generic_path_event(struct ccw_device *, int *); 822 int dasd_generic_verify_path(struct dasd_device *, __u8); 823 void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *); 824 void dasd_generic_space_avail(struct dasd_device *); 825 826 int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); 827 char *dasd_get_sense(struct irb *); 828 829 void dasd_device_set_stop_bits(struct dasd_device *, int); 830 void dasd_device_remove_stop_bits(struct dasd_device *, int); 831 832 int dasd_device_is_ro(struct dasd_device *); 833 834 void dasd_profile_reset(struct dasd_profile *); 835 int dasd_profile_on(struct dasd_profile *); 836 void dasd_profile_off(struct dasd_profile *); 837 char *dasd_get_user_string(const char __user *, size_t); 838 839 /* externals in dasd_devmap.c */ 840 extern int dasd_max_devindex; 841 extern int dasd_probeonly; 842 extern int dasd_autodetect; 843 extern int dasd_nopav; 844 extern int dasd_nofcx; 845 846 int dasd_devmap_init(void); 847 void dasd_devmap_exit(void); 848 849 struct dasd_device *dasd_create_device(struct ccw_device *); 850 void dasd_delete_device(struct dasd_device *); 851 852 int dasd_get_feature(struct ccw_device *, int); 853 int dasd_set_feature(struct ccw_device *, int, int); 854 855 extern const struct attribute_group *dasd_dev_groups[]; 856 void dasd_path_create_kobj(struct dasd_device *, int); 857 void dasd_path_create_kobjects(struct dasd_device *); 858 void dasd_path_remove_kobjects(struct dasd_device *); 859 860 struct dasd_device *dasd_device_from_cdev(struct ccw_device *); 861 struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *); 862 struct dasd_device *dasd_device_from_devindex(int); 863 864 void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *); 865 struct dasd_device *dasd_device_from_gendisk(struct gendisk *); 866 867 int dasd_parse(void) __init; 868 int dasd_busid_known(const char *); 869 870 /* externals in dasd_gendisk.c */ 871 int dasd_gendisk_init(void); 872 void dasd_gendisk_exit(void); 873 int dasd_gendisk_alloc(struct dasd_block *); 874 void dasd_gendisk_free(struct dasd_block *); 875 int dasd_scan_partitions(struct dasd_block *); 876 void dasd_destroy_partitions(struct dasd_block *); 877 878 /* externals in dasd_ioctl.c */ 879 int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long); 880 int dasd_set_read_only(struct block_device *bdev, bool ro); 881 882 /* externals in dasd_proc.c */ 883 int dasd_proc_init(void); 884 void dasd_proc_exit(void); 885 886 /* externals in dasd_erp.c */ 887 struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); 888 struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); 889 struct dasd_ccw_req *dasd_alloc_erp_request(unsigned int, int, int, 890 struct dasd_device *); 891 void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); 892 void dasd_log_sense(struct dasd_ccw_req *, struct irb *); 893 void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb); 894 895 /* externals in dasd_3990_erp.c */ 896 struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); 897 void dasd_3990_erp_handle_sim(struct dasd_device *, char *); 898 899 /* externals in dasd_eer.c */ 900 #ifdef CONFIG_DASD_EER 901 int dasd_eer_init(void); 902 void dasd_eer_exit(void); 903 int dasd_eer_enable(struct dasd_device *); 904 void dasd_eer_disable(struct dasd_device *); 905 void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, 906 unsigned int id); 907 void dasd_eer_snss(struct dasd_device *); 908 909 static inline int dasd_eer_enabled(struct dasd_device *device) 910 { 911 return device->eer_cqr != NULL; 912 } 913 #else 914 #define dasd_eer_init() (0) 915 #define dasd_eer_exit() do { } while (0) 916 #define dasd_eer_enable(d) (0) 917 #define dasd_eer_disable(d) do { } while (0) 918 #define dasd_eer_write(d,c,i) do { } while (0) 919 #define dasd_eer_snss(d) do { } while (0) 920 #define dasd_eer_enabled(d) (0) 921 #endif /* CONFIG_DASD_ERR */ 922 923 924 /* DASD path handling functions */ 925 926 /* 927 * helper functions to modify bit masks for a given channel path for a device 928 */ 929 static inline int dasd_path_is_operational(struct dasd_device *device, int chp) 930 { 931 return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 932 } 933 934 static inline int dasd_path_need_verify(struct dasd_device *device, int chp) 935 { 936 return test_bit(DASD_PATH_TBV, &device->path[chp].flags); 937 } 938 939 static inline void dasd_path_verify(struct dasd_device *device, int chp) 940 { 941 __set_bit(DASD_PATH_TBV, &device->path[chp].flags); 942 } 943 944 static inline void dasd_path_clear_verify(struct dasd_device *device, int chp) 945 { 946 __clear_bit(DASD_PATH_TBV, &device->path[chp].flags); 947 } 948 949 static inline void dasd_path_clear_all_verify(struct dasd_device *device) 950 { 951 int chp; 952 953 for (chp = 0; chp < 8; chp++) 954 dasd_path_clear_verify(device, chp); 955 } 956 957 static inline void dasd_path_fcsec(struct dasd_device *device, int chp) 958 { 959 __set_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 960 } 961 962 static inline void dasd_path_clear_fcsec(struct dasd_device *device, int chp) 963 { 964 __clear_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 965 } 966 967 static inline int dasd_path_need_fcsec(struct dasd_device *device, int chp) 968 { 969 return test_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 970 } 971 972 static inline void dasd_path_clear_all_fcsec(struct dasd_device *device) 973 { 974 int chp; 975 976 for (chp = 0; chp < 8; chp++) 977 dasd_path_clear_fcsec(device, chp); 978 } 979 980 static inline void dasd_path_operational(struct dasd_device *device, int chp) 981 { 982 __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 983 device->opm |= (0x80 >> chp); 984 } 985 986 static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp) 987 { 988 __set_bit(DASD_PATH_NPP, &device->path[chp].flags); 989 } 990 991 static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp) 992 { 993 return test_bit(DASD_PATH_NPP, &device->path[chp].flags); 994 } 995 996 static inline void dasd_path_clear_nonpreferred(struct dasd_device *device, 997 int chp) 998 { 999 __clear_bit(DASD_PATH_NPP, &device->path[chp].flags); 1000 } 1001 1002 static inline void dasd_path_preferred(struct dasd_device *device, int chp) 1003 { 1004 __set_bit(DASD_PATH_PP, &device->path[chp].flags); 1005 } 1006 1007 static inline int dasd_path_is_preferred(struct dasd_device *device, int chp) 1008 { 1009 return test_bit(DASD_PATH_PP, &device->path[chp].flags); 1010 } 1011 1012 static inline void dasd_path_clear_preferred(struct dasd_device *device, 1013 int chp) 1014 { 1015 __clear_bit(DASD_PATH_PP, &device->path[chp].flags); 1016 } 1017 1018 static inline void dasd_path_clear_oper(struct dasd_device *device, int chp) 1019 { 1020 __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 1021 device->opm &= ~(0x80 >> chp); 1022 } 1023 1024 static inline void dasd_path_clear_cable(struct dasd_device *device, int chp) 1025 { 1026 __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1027 } 1028 1029 static inline void dasd_path_cuir(struct dasd_device *device, int chp) 1030 { 1031 __set_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1032 } 1033 1034 static inline int dasd_path_is_cuir(struct dasd_device *device, int chp) 1035 { 1036 return test_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1037 } 1038 1039 static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp) 1040 { 1041 __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1042 } 1043 1044 static inline void dasd_path_ifcc(struct dasd_device *device, int chp) 1045 { 1046 set_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1047 } 1048 1049 static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp) 1050 { 1051 return test_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1052 } 1053 1054 static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp) 1055 { 1056 clear_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1057 } 1058 1059 static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp) 1060 { 1061 __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1062 } 1063 1064 static inline void dasd_path_miscabled(struct dasd_device *device, int chp) 1065 { 1066 __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1067 } 1068 1069 static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp) 1070 { 1071 return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1072 } 1073 1074 static inline void dasd_path_nohpf(struct dasd_device *device, int chp) 1075 { 1076 __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1077 } 1078 1079 static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp) 1080 { 1081 return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1082 } 1083 1084 /* 1085 * get functions for path masks 1086 * will return a path masks for the given device 1087 */ 1088 1089 static inline __u8 dasd_path_get_opm(struct dasd_device *device) 1090 { 1091 return device->opm; 1092 } 1093 1094 static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device) 1095 { 1096 int chp; 1097 __u8 tbvpm = 0x00; 1098 1099 for (chp = 0; chp < 8; chp++) 1100 if (dasd_path_need_verify(device, chp)) 1101 tbvpm |= 0x80 >> chp; 1102 return tbvpm; 1103 } 1104 1105 static inline int dasd_path_get_fcsecpm(struct dasd_device *device) 1106 { 1107 int chp; 1108 1109 for (chp = 0; chp < 8; chp++) 1110 if (dasd_path_need_fcsec(device, chp)) 1111 return 1; 1112 1113 return 0; 1114 } 1115 1116 static inline __u8 dasd_path_get_nppm(struct dasd_device *device) 1117 { 1118 int chp; 1119 __u8 npm = 0x00; 1120 1121 for (chp = 0; chp < 8; chp++) { 1122 if (dasd_path_is_nonpreferred(device, chp)) 1123 npm |= 0x80 >> chp; 1124 } 1125 return npm; 1126 } 1127 1128 static inline __u8 dasd_path_get_ppm(struct dasd_device *device) 1129 { 1130 int chp; 1131 __u8 ppm = 0x00; 1132 1133 for (chp = 0; chp < 8; chp++) 1134 if (dasd_path_is_preferred(device, chp)) 1135 ppm |= 0x80 >> chp; 1136 return ppm; 1137 } 1138 1139 static inline __u8 dasd_path_get_cablepm(struct dasd_device *device) 1140 { 1141 int chp; 1142 __u8 cablepm = 0x00; 1143 1144 for (chp = 0; chp < 8; chp++) 1145 if (dasd_path_is_miscabled(device, chp)) 1146 cablepm |= 0x80 >> chp; 1147 return cablepm; 1148 } 1149 1150 static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device) 1151 { 1152 int chp; 1153 __u8 cuirpm = 0x00; 1154 1155 for (chp = 0; chp < 8; chp++) 1156 if (dasd_path_is_cuir(device, chp)) 1157 cuirpm |= 0x80 >> chp; 1158 return cuirpm; 1159 } 1160 1161 static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device) 1162 { 1163 int chp; 1164 __u8 ifccpm = 0x00; 1165 1166 for (chp = 0; chp < 8; chp++) 1167 if (dasd_path_is_ifcc(device, chp)) 1168 ifccpm |= 0x80 >> chp; 1169 return ifccpm; 1170 } 1171 1172 static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device) 1173 { 1174 int chp; 1175 __u8 hpfpm = 0x00; 1176 1177 for (chp = 0; chp < 8; chp++) 1178 if (dasd_path_is_nohpf(device, chp)) 1179 hpfpm |= 0x80 >> chp; 1180 return hpfpm; 1181 } 1182 1183 static inline u8 dasd_path_get_fcs_path(struct dasd_device *device, int chp) 1184 { 1185 return device->path[chp].fc_security; 1186 } 1187 1188 static inline int dasd_path_get_fcs_device(struct dasd_device *device) 1189 { 1190 u8 fc_sec = 0; 1191 int chp; 1192 1193 for (chp = 0; chp < 8; chp++) { 1194 if (device->opm & (0x80 >> chp)) { 1195 fc_sec = device->path[chp].fc_security; 1196 break; 1197 } 1198 } 1199 for (; chp < 8; chp++) { 1200 if (device->opm & (0x80 >> chp)) 1201 if (device->path[chp].fc_security != fc_sec) 1202 return -EINVAL; 1203 } 1204 1205 return fc_sec; 1206 } 1207 1208 /* 1209 * add functions for path masks 1210 * the existing path mask will be extended by the given path mask 1211 */ 1212 static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm) 1213 { 1214 int chp; 1215 1216 for (chp = 0; chp < 8; chp++) 1217 if (pm & (0x80 >> chp)) 1218 dasd_path_verify(device, chp); 1219 } 1220 1221 static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device) 1222 { 1223 int chp; 1224 __u8 nopm = 0x00; 1225 1226 for (chp = 0; chp < 8; chp++) 1227 if (dasd_path_is_nohpf(device, chp) || 1228 dasd_path_is_ifcc(device, chp) || 1229 dasd_path_is_cuir(device, chp) || 1230 dasd_path_is_miscabled(device, chp)) 1231 nopm |= 0x80 >> chp; 1232 return nopm; 1233 } 1234 1235 static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm) 1236 { 1237 int chp; 1238 1239 for (chp = 0; chp < 8; chp++) 1240 if (pm & (0x80 >> chp)) { 1241 dasd_path_operational(device, chp); 1242 /* 1243 * if the path is used 1244 * it should not be in one of the negative lists 1245 */ 1246 dasd_path_clear_nohpf(device, chp); 1247 dasd_path_clear_cuir(device, chp); 1248 dasd_path_clear_cable(device, chp); 1249 dasd_path_clear_ifcc(device, chp); 1250 } 1251 } 1252 1253 static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm) 1254 { 1255 int chp; 1256 1257 for (chp = 0; chp < 8; chp++) 1258 if (pm & (0x80 >> chp)) 1259 dasd_path_miscabled(device, chp); 1260 } 1261 1262 static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm) 1263 { 1264 int chp; 1265 1266 for (chp = 0; chp < 8; chp++) 1267 if (pm & (0x80 >> chp)) 1268 dasd_path_cuir(device, chp); 1269 } 1270 1271 static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm) 1272 { 1273 int chp; 1274 1275 for (chp = 0; chp < 8; chp++) 1276 if (pm & (0x80 >> chp)) 1277 dasd_path_ifcc(device, chp); 1278 } 1279 1280 static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm) 1281 { 1282 int chp; 1283 1284 for (chp = 0; chp < 8; chp++) 1285 if (pm & (0x80 >> chp)) 1286 dasd_path_nonpreferred(device, chp); 1287 } 1288 1289 static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm) 1290 { 1291 int chp; 1292 1293 for (chp = 0; chp < 8; chp++) 1294 if (pm & (0x80 >> chp)) 1295 dasd_path_nohpf(device, chp); 1296 } 1297 1298 static inline void dasd_path_add_ppm(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_preferred(device, chp); 1305 } 1306 1307 static inline void dasd_path_add_fcsecpm(struct dasd_device *device, __u8 pm) 1308 { 1309 int chp; 1310 1311 for (chp = 0; chp < 8; chp++) 1312 if (pm & (0x80 >> chp)) 1313 dasd_path_fcsec(device, chp); 1314 } 1315 1316 /* 1317 * set functions for path masks 1318 * the existing path mask will be replaced by the given path mask 1319 */ 1320 static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm) 1321 { 1322 int chp; 1323 1324 for (chp = 0; chp < 8; chp++) 1325 if (pm & (0x80 >> chp)) 1326 dasd_path_verify(device, chp); 1327 else 1328 dasd_path_clear_verify(device, chp); 1329 } 1330 1331 static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm) 1332 { 1333 int chp; 1334 1335 for (chp = 0; chp < 8; chp++) { 1336 dasd_path_clear_oper(device, chp); 1337 if (pm & (0x80 >> chp)) { 1338 dasd_path_operational(device, chp); 1339 /* 1340 * if the path is used 1341 * it should not be in one of the negative lists 1342 */ 1343 dasd_path_clear_nohpf(device, chp); 1344 dasd_path_clear_cuir(device, chp); 1345 dasd_path_clear_cable(device, chp); 1346 dasd_path_clear_ifcc(device, chp); 1347 } 1348 } 1349 } 1350 1351 /* 1352 * remove functions for path masks 1353 * the existing path mask will be cleared with the given path mask 1354 */ 1355 static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm) 1356 { 1357 int chp; 1358 1359 for (chp = 0; chp < 8; chp++) { 1360 if (pm & (0x80 >> chp)) 1361 dasd_path_clear_oper(device, chp); 1362 } 1363 } 1364 1365 /* 1366 * add the newly available path to the to be verified pm and remove it from 1367 * normal operation until it is verified 1368 */ 1369 static inline void dasd_path_available(struct dasd_device *device, int chp) 1370 { 1371 dasd_path_clear_oper(device, chp); 1372 dasd_path_verify(device, chp); 1373 } 1374 1375 static inline void dasd_path_notoper(struct dasd_device *device, int chp) 1376 { 1377 dasd_path_clear_oper(device, chp); 1378 dasd_path_clear_preferred(device, chp); 1379 dasd_path_clear_nonpreferred(device, chp); 1380 } 1381 1382 static inline void dasd_path_fcsec_update(struct dasd_device *device, int chp) 1383 { 1384 dasd_path_fcsec(device, chp); 1385 } 1386 1387 /* 1388 * remove all paths from normal operation 1389 */ 1390 static inline void dasd_path_no_path(struct dasd_device *device) 1391 { 1392 int chp; 1393 1394 for (chp = 0; chp < 8; chp++) 1395 dasd_path_notoper(device, chp); 1396 1397 dasd_path_clear_all_verify(device); 1398 } 1399 1400 /* end - path handling */ 1401 1402 #endif /* DASD_H */ 1403