1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 4 * Horst Hummel <Horst.Hummel@de.ibm.com> 5 * Martin Schwidefsky <schwidefsky@de.ibm.com> 6 * Bugreports.to..: <Linux390@de.ibm.com> 7 * Copyright IBM Corp. 1999, 2009 8 */ 9 10 #ifndef DASD_INT_H 11 #define DASD_INT_H 12 13 /* we keep old device allocation scheme; IOW, minors are still in 0..255 */ 14 #define DASD_PER_MAJOR (1U << (MINORBITS - DASD_PARTN_BITS)) 15 #define DASD_PARTN_MASK ((1 << DASD_PARTN_BITS) - 1) 16 17 /* 18 * States a dasd device can have: 19 * new: the dasd_device structure is allocated. 20 * known: the discipline for the device is identified. 21 * basic: the device can do basic i/o. 22 * unfmt: the device could not be analyzed (format is unknown). 23 * ready: partition detection is done and the device is can do block io. 24 * online: the device accepts requests from the block device queue. 25 * 26 * Things to do for startup state transitions: 27 * new -> known: find discipline for the device and create devfs entries. 28 * known -> basic: request irq line for the device. 29 * basic -> ready: do the initial analysis, e.g. format detection, 30 * do block device setup and detect partitions. 31 * ready -> online: schedule the device tasklet. 32 * Things to do for shutdown state transitions: 33 * online -> ready: just set the new device state. 34 * ready -> basic: flush requests from the block device layer, clear 35 * partition information and reset format information. 36 * basic -> known: terminate all requests and free irq. 37 * known -> new: remove devfs entries and forget discipline. 38 */ 39 40 #define DASD_STATE_NEW 0 41 #define DASD_STATE_KNOWN 1 42 #define DASD_STATE_BASIC 2 43 #define DASD_STATE_UNFMT 3 44 #define DASD_STATE_READY 4 45 #define DASD_STATE_ONLINE 5 46 47 #include <linux/module.h> 48 #include <linux/wait.h> 49 #include <linux/blkdev.h> 50 #include <linux/genhd.h> 51 #include <linux/hdreg.h> 52 #include <linux/interrupt.h> 53 #include <linux/log2.h> 54 #include <asm/ccwdev.h> 55 #include <linux/workqueue.h> 56 #include <asm/debug.h> 57 #include <asm/dasd.h> 58 #include <asm/idals.h> 59 #include <linux/bitops.h> 60 #include <linux/blk-mq.h> 61 62 /* DASD discipline magic */ 63 #define DASD_ECKD_MAGIC 0xC5C3D2C4 64 #define DASD_DIAG_MAGIC 0xC4C9C1C7 65 #define DASD_FBA_MAGIC 0xC6C2C140 66 67 /* 68 * SECTION: Type definitions 69 */ 70 struct dasd_device; 71 struct dasd_block; 72 73 /* BIT DEFINITIONS FOR SENSE DATA */ 74 #define DASD_SENSE_BIT_0 0x80 75 #define DASD_SENSE_BIT_1 0x40 76 #define DASD_SENSE_BIT_2 0x20 77 #define DASD_SENSE_BIT_3 0x10 78 79 /* BIT DEFINITIONS FOR SIM SENSE */ 80 #define DASD_SIM_SENSE 0x0F 81 #define DASD_SIM_MSG_TO_OP 0x03 82 #define DASD_SIM_LOG 0x0C 83 84 /* lock class for nested cdev lock */ 85 #define CDEV_NESTED_FIRST 1 86 #define CDEV_NESTED_SECOND 2 87 88 /* 89 * SECTION: MACROs for klogd and s390 debug feature (dbf) 90 */ 91 #define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \ 92 do { \ 93 debug_sprintf_event(d_device->debug_area, \ 94 d_level, \ 95 d_str "\n", \ 96 d_data); \ 97 } while(0) 98 99 #define DBF_EVENT(d_level, d_str, d_data...)\ 100 do { \ 101 debug_sprintf_event(dasd_debug_area, \ 102 d_level,\ 103 d_str "\n", \ 104 d_data); \ 105 } while(0) 106 107 #define DBF_EVENT_DEVID(d_level, d_cdev, d_str, d_data...) \ 108 do { \ 109 struct ccw_dev_id __dev_id; \ 110 ccw_device_get_id(d_cdev, &__dev_id); \ 111 debug_sprintf_event(dasd_debug_area, \ 112 d_level, \ 113 "0.%x.%04x " d_str "\n", \ 114 __dev_id.ssid, __dev_id.devno, d_data); \ 115 } while (0) 116 117 /* limit size for an errorstring */ 118 #define ERRORLENGTH 30 119 120 /* definition of dbf debug levels */ 121 #define DBF_EMERG 0 /* system is unusable */ 122 #define DBF_ALERT 1 /* action must be taken immediately */ 123 #define DBF_CRIT 2 /* critical conditions */ 124 #define DBF_ERR 3 /* error conditions */ 125 #define DBF_WARNING 4 /* warning conditions */ 126 #define DBF_NOTICE 5 /* normal but significant condition */ 127 #define DBF_INFO 6 /* informational */ 128 #define DBF_DEBUG 6 /* debug-level messages */ 129 130 /* messages to be written via klogd and dbf */ 131 #define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\ 132 do { \ 133 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ 134 dev_name(&d_device->cdev->dev), d_args); \ 135 DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \ 136 } while(0) 137 138 #define MESSAGE(d_loglevel,d_string,d_args...)\ 139 do { \ 140 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ 141 DBF_EVENT(DBF_ALERT, d_string, d_args); \ 142 } while(0) 143 144 /* messages to be written via klogd only */ 145 #define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\ 146 do { \ 147 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ 148 dev_name(&d_device->cdev->dev), d_args); \ 149 } while(0) 150 151 #define MESSAGE_LOG(d_loglevel,d_string,d_args...)\ 152 do { \ 153 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ 154 } while(0) 155 156 /* Macro to calculate number of blocks per page */ 157 #define BLOCKS_PER_PAGE(blksize) (PAGE_SIZE / blksize) 158 159 struct dasd_ccw_req { 160 unsigned int magic; /* Eye catcher */ 161 int intrc; /* internal error, e.g. from start_IO */ 162 struct list_head devlist; /* for dasd_device request queue */ 163 struct list_head blocklist; /* for dasd_block request queue */ 164 struct dasd_block *block; /* the originating block device */ 165 struct dasd_device *memdev; /* the device used to allocate this */ 166 struct dasd_device *startdev; /* device the request is started on */ 167 struct dasd_device *basedev; /* base device if no block->base */ 168 void *cpaddr; /* address of ccw or tcw */ 169 short retries; /* A retry counter */ 170 unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */ 171 char status; /* status of this request */ 172 char lpm; /* logical path mask */ 173 unsigned long flags; /* flags of this request */ 174 struct dasd_queue *dq; 175 unsigned long starttime; /* jiffies time of request start */ 176 unsigned long expires; /* expiration period in jiffies */ 177 void *data; /* pointer to data area */ 178 struct irb irb; /* device status in case of an error */ 179 struct dasd_ccw_req *refers; /* ERP-chain queueing. */ 180 void *function; /* originating ERP action */ 181 void *mem_chunk; 182 183 unsigned long buildclk; /* TOD-clock of request generation */ 184 unsigned long startclk; /* TOD-clock of request start */ 185 unsigned long stopclk; /* TOD-clock of request interrupt */ 186 unsigned long endclk; /* TOD-clock of request termination */ 187 188 void (*callback)(struct dasd_ccw_req *, void *data); 189 void *callback_data; 190 unsigned int proc_bytes; /* bytes for partial completion */ 191 }; 192 193 /* 194 * dasd_ccw_req -> status can be: 195 */ 196 #define DASD_CQR_FILLED 0x00 /* request is ready to be processed */ 197 #define DASD_CQR_DONE 0x01 /* request is completed successfully */ 198 #define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */ 199 #define DASD_CQR_IN_ERP 0x03 /* request is in recovery */ 200 #define DASD_CQR_FAILED 0x04 /* request is finally failed */ 201 #define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */ 202 203 #define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */ 204 #define DASD_CQR_IN_IO 0x81 /* request is currently in IO */ 205 #define DASD_CQR_ERROR 0x82 /* request is completed with error */ 206 #define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */ 207 #define DASD_CQR_CLEARED 0x84 /* request was cleared */ 208 #define DASD_CQR_SUCCESS 0x85 /* request was successful */ 209 210 /* default expiration time*/ 211 #define DASD_EXPIRES 300 212 #define DASD_EXPIRES_MAX 40000000 213 #define DASD_RETRIES 256 214 #define DASD_RETRIES_MAX 32768 215 216 /* per dasd_ccw_req flags */ 217 #define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */ 218 #define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */ 219 #define DASD_CQR_VERIFY_PATH 2 /* path verification request */ 220 #define DASD_CQR_ALLOW_SLOCK 3 /* Try this request even when lock was 221 * stolen. Should not be combined with 222 * DASD_CQR_FLAGS_USE_ERP 223 */ 224 /* 225 * The following flags are used to suppress output of certain errors. 226 */ 227 #define DASD_CQR_SUPPRESS_NRF 4 /* Suppress 'No Record Found' error */ 228 #define DASD_CQR_SUPPRESS_FP 5 /* Suppress 'File Protected' error*/ 229 #define DASD_CQR_SUPPRESS_IL 6 /* Suppress 'Incorrect Length' error */ 230 #define DASD_CQR_SUPPRESS_CR 7 /* Suppress 'Command Reject' error */ 231 232 #define DASD_REQ_PER_DEV 4 233 234 /* Signature for error recovery functions. */ 235 typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *); 236 237 /* 238 * A single CQR can only contain a maximum of 255 CCWs. It is limited by 239 * the locate record and locate record extended count value which can only hold 240 * 1 Byte max. 241 */ 242 #define DASD_CQR_MAX_CCW 255 243 244 /* 245 * Unique identifier for dasd device. 246 */ 247 #define UA_NOT_CONFIGURED 0x00 248 #define UA_BASE_DEVICE 0x01 249 #define UA_BASE_PAV_ALIAS 0x02 250 #define UA_HYPER_PAV_ALIAS 0x03 251 252 struct dasd_uid { 253 __u8 type; 254 char vendor[4]; 255 char serial[15]; 256 __u16 ssid; 257 __u8 real_unit_addr; 258 __u8 base_unit_addr; 259 char vduit[33]; 260 }; 261 262 /* 263 * the struct dasd_discipline is 264 * sth like a table of virtual functions, if you think of dasd_eckd 265 * inheriting dasd... 266 * no, currently we are not planning to reimplement the driver in C++ 267 */ 268 struct dasd_discipline { 269 struct module *owner; 270 char ebcname[8]; /* a name used for tagging and printks */ 271 char name[8]; /* a name used for tagging and printks */ 272 273 struct list_head list; /* used for list of disciplines */ 274 275 /* 276 * Device recognition functions. check_device is used to verify 277 * the sense data and the information returned by read device 278 * characteristics. It returns 0 if the discipline can be used 279 * for the device in question. uncheck_device is called during 280 * device shutdown to deregister a device from its discipline. 281 */ 282 int (*check_device) (struct dasd_device *); 283 void (*uncheck_device) (struct dasd_device *); 284 285 /* 286 * do_analysis is used in the step from device state "basic" to 287 * state "accept". It returns 0 if the device can be made ready, 288 * it returns -EMEDIUMTYPE if the device can't be made ready or 289 * -EAGAIN if do_analysis started a ccw that needs to complete 290 * before the analysis may be repeated. 291 */ 292 int (*do_analysis) (struct dasd_block *); 293 294 /* 295 * This function is called, when new paths become available. 296 * Disciplins may use this callback to do necessary setup work, 297 * e.g. verify that new path is compatible with the current 298 * configuration. 299 */ 300 int (*verify_path)(struct dasd_device *, __u8); 301 int (*pe_handler)(struct dasd_device *, __u8, __u8); 302 303 /* 304 * Last things to do when a device is set online, and first things 305 * when it is set offline. 306 */ 307 int (*basic_to_ready) (struct dasd_device *); 308 int (*online_to_ready) (struct dasd_device *); 309 int (*basic_to_known)(struct dasd_device *); 310 311 /* 312 * Initialize block layer request queue. 313 */ 314 void (*setup_blk_queue)(struct dasd_block *); 315 /* (struct dasd_device *); 316 * Device operation functions. build_cp creates a ccw chain for 317 * a block device request, start_io starts the request and 318 * term_IO cancels it (e.g. in case of a timeout). format_device 319 * formats the device and check_device_format compares the format of 320 * a device with the expected format_data. 321 * handle_terminated_request allows to examine a cqr and prepare 322 * it for retry. 323 */ 324 struct dasd_ccw_req *(*build_cp) (struct dasd_device *, 325 struct dasd_block *, 326 struct request *); 327 int (*start_IO) (struct dasd_ccw_req *); 328 int (*term_IO) (struct dasd_ccw_req *); 329 void (*handle_terminated_request) (struct dasd_ccw_req *); 330 int (*format_device) (struct dasd_device *, 331 struct format_data_t *, int); 332 int (*check_device_format)(struct dasd_device *, 333 struct format_check_t *, int); 334 int (*free_cp) (struct dasd_ccw_req *, struct request *); 335 336 /* 337 * Error recovery functions. examine_error() returns a value that 338 * indicates what to do for an error condition. If examine_error() 339 * returns 'dasd_era_recover' erp_action() is called to create a 340 * special error recovery ccw. erp_postaction() is called after 341 * an error recovery ccw has finished its execution. dump_sense 342 * is called for every error condition to print the sense data 343 * to the console. 344 */ 345 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); 346 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); 347 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, 348 struct irb *); 349 void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *); 350 void (*check_for_device_change) (struct dasd_device *, 351 struct dasd_ccw_req *, 352 struct irb *); 353 354 /* i/o control functions. */ 355 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *); 356 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); 357 int (*ioctl) (struct dasd_block *, unsigned int, void __user *); 358 359 /* reload device after state change */ 360 int (*reload) (struct dasd_device *); 361 362 int (*get_uid) (struct dasd_device *, struct dasd_uid *); 363 void (*kick_validate) (struct dasd_device *); 364 int (*check_attention)(struct dasd_device *, __u8); 365 int (*host_access_count)(struct dasd_device *); 366 int (*hosts_print)(struct dasd_device *, struct seq_file *); 367 void (*handle_hpf_error)(struct dasd_device *, struct irb *); 368 void (*disable_hpf)(struct dasd_device *); 369 int (*hpf_enabled)(struct dasd_device *); 370 void (*reset_path)(struct dasd_device *, __u8); 371 372 /* 373 * Extent Space Efficient (ESE) relevant functions 374 */ 375 int (*is_ese)(struct dasd_device *); 376 /* Capacity */ 377 int (*space_allocated)(struct dasd_device *); 378 int (*space_configured)(struct dasd_device *); 379 int (*logical_capacity)(struct dasd_device *); 380 int (*release_space)(struct dasd_device *, struct format_data_t *); 381 /* Extent Pool */ 382 int (*ext_pool_id)(struct dasd_device *); 383 int (*ext_size)(struct dasd_device *); 384 int (*ext_pool_cap_at_warnlevel)(struct dasd_device *); 385 int (*ext_pool_warn_thrshld)(struct dasd_device *); 386 int (*ext_pool_oos)(struct dasd_device *); 387 int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *); 388 struct dasd_ccw_req *(*ese_format)(struct dasd_device *, 389 struct dasd_ccw_req *, struct irb *); 390 int (*ese_read)(struct dasd_ccw_req *, struct irb *); 391 }; 392 393 extern struct dasd_discipline *dasd_diag_discipline_pointer; 394 395 /* 396 * Notification numbers for extended error reporting notifications: 397 * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's 398 * eer pointer) is freed. The error reporting module needs to do all necessary 399 * cleanup steps. 400 * The DASD_EER_TRIGGER notification sends the actual error reports (triggers). 401 */ 402 #define DASD_EER_DISABLE 0 403 #define DASD_EER_TRIGGER 1 404 405 /* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */ 406 #define DASD_EER_FATALERROR 1 407 #define DASD_EER_NOPATH 2 408 #define DASD_EER_STATECHANGE 3 409 #define DASD_EER_PPRCSUSPEND 4 410 #define DASD_EER_NOSPC 5 411 412 /* DASD path handling */ 413 414 #define DASD_PATH_OPERATIONAL 1 415 #define DASD_PATH_TBV 2 416 #define DASD_PATH_PP 3 417 #define DASD_PATH_NPP 4 418 #define DASD_PATH_MISCABLED 5 419 #define DASD_PATH_NOHPF 6 420 #define DASD_PATH_CUIR 7 421 #define DASD_PATH_IFCC 8 422 #define DASD_PATH_FCSEC 9 423 424 #define DASD_THRHLD_MAX 4294967295U 425 #define DASD_INTERVAL_MAX 4294967295U 426 427 /* FC Endpoint Security Capabilities */ 428 #define DASD_FC_SECURITY_UNSUP 0 429 #define DASD_FC_SECURITY_AUTH 1 430 #define DASD_FC_SECURITY_ENC_FCSP2 2 431 #define DASD_FC_SECURITY_ENC_ERAS 3 432 433 #define DASD_FC_SECURITY_ENC_STR "Encryption" 434 static const struct { 435 u8 value; 436 char *name; 437 } dasd_path_fcs_mnemonics[] = { 438 { DASD_FC_SECURITY_UNSUP, "Unsupported" }, 439 { DASD_FC_SECURITY_AUTH, "Authentication" }, 440 { DASD_FC_SECURITY_ENC_FCSP2, DASD_FC_SECURITY_ENC_STR }, 441 { DASD_FC_SECURITY_ENC_ERAS, DASD_FC_SECURITY_ENC_STR }, 442 }; 443 444 static inline char *dasd_path_get_fcs_str(int val) 445 { 446 int i; 447 448 for (i = 0; i < ARRAY_SIZE(dasd_path_fcs_mnemonics); i++) { 449 if (dasd_path_fcs_mnemonics[i].value == val) 450 return dasd_path_fcs_mnemonics[i].name; 451 } 452 453 return dasd_path_fcs_mnemonics[0].name; 454 } 455 456 struct dasd_path { 457 unsigned long flags; 458 u8 cssid; 459 u8 ssid; 460 u8 chpid; 461 struct dasd_conf_data *conf_data; 462 atomic_t error_count; 463 unsigned long errorclk; 464 u8 fc_security; 465 struct kobject kobj; 466 bool in_sysfs; 467 }; 468 469 #define to_dasd_path(path) container_of(path, struct dasd_path, kobj) 470 471 static inline void dasd_path_release(struct kobject *kobj) 472 { 473 /* Memory for the dasd_path kobject is freed when dasd_free_device() is called */ 474 } 475 476 477 struct dasd_profile_info { 478 /* legacy part of profile data, as in dasd_profile_info_t */ 479 unsigned int dasd_io_reqs; /* number of requests processed */ 480 unsigned int dasd_io_sects; /* number of sectors processed */ 481 unsigned int dasd_io_secs[32]; /* histogram of request's sizes */ 482 unsigned int dasd_io_times[32]; /* histogram of requests's times */ 483 unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */ 484 unsigned int dasd_io_time1[32]; /* hist. of time from build to start */ 485 unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */ 486 unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */ 487 unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */ 488 unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */ 489 490 /* new data */ 491 struct timespec64 starttod; /* time of start or last reset */ 492 unsigned int dasd_io_alias; /* requests using an alias */ 493 unsigned int dasd_io_tpm; /* requests using transport mode */ 494 unsigned int dasd_read_reqs; /* total number of read requests */ 495 unsigned int dasd_read_sects; /* total number read sectors */ 496 unsigned int dasd_read_alias; /* read request using an alias */ 497 unsigned int dasd_read_tpm; /* read requests in transport mode */ 498 unsigned int dasd_read_secs[32]; /* histogram of request's sizes */ 499 unsigned int dasd_read_times[32]; /* histogram of requests's times */ 500 unsigned int dasd_read_time1[32]; /* hist. time from build to start */ 501 unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */ 502 unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */ 503 unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */ 504 unsigned long dasd_sum_times; /* sum of request times */ 505 unsigned long dasd_sum_time_str; /* sum of time from build to start */ 506 unsigned long dasd_sum_time_irq; /* sum of time from start to irq */ 507 unsigned long dasd_sum_time_end; /* sum of time from irq to end */ 508 }; 509 510 struct dasd_profile { 511 struct dentry *dentry; 512 struct dasd_profile_info *data; 513 spinlock_t lock; 514 }; 515 516 struct dasd_format_entry { 517 struct list_head list; 518 sector_t track; 519 }; 520 521 struct dasd_device { 522 /* Block device stuff. */ 523 struct dasd_block *block; 524 525 unsigned int devindex; 526 unsigned long flags; /* per device flags */ 527 unsigned short features; /* copy of devmap-features (read-only!) */ 528 529 /* extended error reporting stuff (eer) */ 530 struct dasd_ccw_req *eer_cqr; 531 532 /* Device discipline stuff. */ 533 struct dasd_discipline *discipline; 534 struct dasd_discipline *base_discipline; 535 void *private; 536 struct dasd_path path[8]; 537 __u8 opm; 538 539 /* Device state and target state. */ 540 int state, target; 541 struct mutex state_mutex; 542 int stopped; /* device (ccw_device_start) was stopped */ 543 544 /* reference count. */ 545 atomic_t ref_count; 546 547 /* ccw queue and memory for static ccw/erp buffers. */ 548 struct list_head ccw_queue; 549 spinlock_t mem_lock; 550 void *ccw_mem; 551 void *erp_mem; 552 void *ese_mem; 553 struct list_head ccw_chunks; 554 struct list_head erp_chunks; 555 struct list_head ese_chunks; 556 557 atomic_t tasklet_scheduled; 558 struct tasklet_struct tasklet; 559 struct work_struct kick_work; 560 struct work_struct reload_device; 561 struct work_struct kick_validate; 562 struct work_struct suc_work; 563 struct work_struct requeue_requests; 564 struct timer_list timer; 565 566 debug_info_t *debug_area; 567 568 struct ccw_device *cdev; 569 570 /* hook for alias management */ 571 struct list_head alias_list; 572 573 /* default expiration time in s */ 574 unsigned long default_expires; 575 unsigned long default_retries; 576 577 unsigned long blk_timeout; 578 579 unsigned long path_thrhld; 580 unsigned long path_interval; 581 582 struct dentry *debugfs_dentry; 583 struct dentry *hosts_dentry; 584 struct dasd_profile profile; 585 struct dasd_format_entry format_entry; 586 struct kset *paths_info; 587 }; 588 589 struct dasd_block { 590 /* Block device stuff. */ 591 struct gendisk *gdp; 592 struct request_queue *request_queue; 593 spinlock_t request_queue_lock; 594 struct blk_mq_tag_set tag_set; 595 struct block_device *bdev; 596 atomic_t open_count; 597 598 unsigned long blocks; /* size of volume in blocks */ 599 unsigned int bp_block; /* bytes per block */ 600 unsigned int s2b_shift; /* log2 (bp_block/512) */ 601 602 struct dasd_device *base; 603 struct list_head ccw_queue; 604 spinlock_t queue_lock; 605 606 atomic_t tasklet_scheduled; 607 struct tasklet_struct tasklet; 608 struct timer_list timer; 609 610 struct dentry *debugfs_dentry; 611 struct dasd_profile profile; 612 613 struct list_head format_list; 614 spinlock_t format_lock; 615 }; 616 617 struct dasd_attention_data { 618 struct dasd_device *device; 619 __u8 lpum; 620 }; 621 622 struct dasd_queue { 623 spinlock_t lock; 624 }; 625 626 /* reasons why device (ccw_device_start) was stopped */ 627 #define DASD_STOPPED_NOT_ACC 1 /* not accessible */ 628 #define DASD_STOPPED_QUIESCE 2 /* Quiesced */ 629 #define DASD_STOPPED_PENDING 4 /* long busy */ 630 #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ 631 #define DASD_STOPPED_SU 16 /* summary unit check handling */ 632 #define DASD_STOPPED_NOSPC 128 /* no space left */ 633 634 /* per device flags */ 635 #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ 636 #define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ 637 #define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ 638 #define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't 639 * confuse this with the user specified 640 * read-only feature. 641 */ 642 #define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */ 643 #define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */ 644 #define DASD_FLAG_SUSPENDED 9 /* The device was suspended */ 645 #define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/ 646 #define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */ 647 #define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */ 648 #define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */ 649 #define DASD_FLAG_SUC 14 /* unhandled summary unit check */ 650 651 #define DASD_SLEEPON_START_TAG ((void *) 1) 652 #define DASD_SLEEPON_END_TAG ((void *) 2) 653 654 void dasd_put_device_wake(struct dasd_device *); 655 656 /* 657 * Reference count inliners 658 */ 659 static inline void 660 dasd_get_device(struct dasd_device *device) 661 { 662 atomic_inc(&device->ref_count); 663 } 664 665 static inline void 666 dasd_put_device(struct dasd_device *device) 667 { 668 if (atomic_dec_return(&device->ref_count) == 0) 669 dasd_put_device_wake(device); 670 } 671 672 /* 673 * The static memory in ccw_mem and erp_mem is managed by a sorted 674 * list of free memory chunks. 675 */ 676 struct dasd_mchunk 677 { 678 struct list_head list; 679 unsigned long size; 680 } __attribute__ ((aligned(8))); 681 682 static inline void 683 dasd_init_chunklist(struct list_head *chunk_list, void *mem, 684 unsigned long size) 685 { 686 struct dasd_mchunk *chunk; 687 688 INIT_LIST_HEAD(chunk_list); 689 chunk = (struct dasd_mchunk *) mem; 690 chunk->size = size - sizeof(struct dasd_mchunk); 691 list_add(&chunk->list, chunk_list); 692 } 693 694 static inline void * 695 dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size) 696 { 697 struct dasd_mchunk *chunk, *tmp; 698 699 size = (size + 7L) & -8L; 700 list_for_each_entry(chunk, chunk_list, list) { 701 if (chunk->size < size) 702 continue; 703 if (chunk->size > size + sizeof(struct dasd_mchunk)) { 704 char *endaddr = (char *) (chunk + 1) + chunk->size; 705 tmp = (struct dasd_mchunk *) (endaddr - size) - 1; 706 tmp->size = size; 707 chunk->size -= size + sizeof(struct dasd_mchunk); 708 chunk = tmp; 709 } else 710 list_del(&chunk->list); 711 return (void *) (chunk + 1); 712 } 713 return NULL; 714 } 715 716 static inline void 717 dasd_free_chunk(struct list_head *chunk_list, void *mem) 718 { 719 struct dasd_mchunk *chunk, *tmp; 720 struct list_head *p, *left; 721 722 chunk = (struct dasd_mchunk *) 723 ((char *) mem - sizeof(struct dasd_mchunk)); 724 /* Find out the left neighbour in chunk_list. */ 725 left = chunk_list; 726 list_for_each(p, chunk_list) { 727 if (list_entry(p, struct dasd_mchunk, list) > chunk) 728 break; 729 left = p; 730 } 731 /* Try to merge with right neighbour = next element from left. */ 732 if (left->next != chunk_list) { 733 tmp = list_entry(left->next, struct dasd_mchunk, list); 734 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) { 735 list_del(&tmp->list); 736 chunk->size += tmp->size + sizeof(struct dasd_mchunk); 737 } 738 } 739 /* Try to merge with left neighbour. */ 740 if (left != chunk_list) { 741 tmp = list_entry(left, struct dasd_mchunk, list); 742 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) { 743 tmp->size += chunk->size + sizeof(struct dasd_mchunk); 744 return; 745 } 746 } 747 __list_add(&chunk->list, left, left->next); 748 } 749 750 /* 751 * Check if bsize is in { 512, 1024, 2048, 4096 } 752 */ 753 static inline int 754 dasd_check_blocksize(int bsize) 755 { 756 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize)) 757 return -EMEDIUMTYPE; 758 return 0; 759 } 760 761 /* externals in dasd.c */ 762 #define DASD_PROFILE_OFF 0 763 #define DASD_PROFILE_ON 1 764 #define DASD_PROFILE_GLOBAL_ONLY 2 765 766 extern debug_info_t *dasd_debug_area; 767 extern struct dasd_profile dasd_global_profile; 768 extern unsigned int dasd_global_profile_level; 769 extern const struct block_device_operations dasd_device_operations; 770 771 extern struct kmem_cache *dasd_page_cache; 772 773 struct dasd_ccw_req * 774 dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *); 775 struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *); 776 void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); 777 void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *); 778 void dasd_wakeup_cb(struct dasd_ccw_req *, void *); 779 780 struct dasd_device *dasd_alloc_device(void); 781 void dasd_free_device(struct dasd_device *); 782 783 struct dasd_block *dasd_alloc_block(void); 784 void dasd_free_block(struct dasd_block *); 785 786 enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved); 787 788 void dasd_enable_device(struct dasd_device *); 789 void dasd_set_target_state(struct dasd_device *, int); 790 void dasd_kick_device(struct dasd_device *); 791 void dasd_reload_device(struct dasd_device *); 792 void dasd_schedule_requeue(struct dasd_device *); 793 794 void dasd_add_request_head(struct dasd_ccw_req *); 795 void dasd_add_request_tail(struct dasd_ccw_req *); 796 int dasd_start_IO(struct dasd_ccw_req *); 797 int dasd_term_IO(struct dasd_ccw_req *); 798 void dasd_schedule_device_bh(struct dasd_device *); 799 void dasd_schedule_block_bh(struct dasd_block *); 800 int dasd_sleep_on(struct dasd_ccw_req *); 801 int dasd_sleep_on_queue(struct list_head *); 802 int dasd_sleep_on_immediatly(struct dasd_ccw_req *); 803 int dasd_sleep_on_queue_interruptible(struct list_head *); 804 int dasd_sleep_on_interruptible(struct dasd_ccw_req *); 805 void dasd_device_set_timer(struct dasd_device *, int); 806 void dasd_device_clear_timer(struct dasd_device *); 807 void dasd_block_set_timer(struct dasd_block *, int); 808 void dasd_block_clear_timer(struct dasd_block *); 809 int dasd_cancel_req(struct dasd_ccw_req *); 810 int dasd_flush_device_queue(struct dasd_device *); 811 int dasd_generic_probe(struct ccw_device *); 812 void dasd_generic_free_discipline(struct dasd_device *); 813 void dasd_generic_remove (struct ccw_device *cdev); 814 int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); 815 int dasd_generic_set_offline (struct ccw_device *cdev); 816 int dasd_generic_notify(struct ccw_device *, int); 817 int dasd_generic_last_path_gone(struct dasd_device *); 818 int dasd_generic_path_operational(struct dasd_device *); 819 void dasd_generic_shutdown(struct ccw_device *); 820 821 void dasd_generic_handle_state_change(struct dasd_device *); 822 enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *); 823 void dasd_generic_path_event(struct ccw_device *, int *); 824 int dasd_generic_verify_path(struct dasd_device *, __u8); 825 void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *); 826 void dasd_generic_space_avail(struct dasd_device *); 827 828 int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); 829 char *dasd_get_sense(struct irb *); 830 831 void dasd_device_set_stop_bits(struct dasd_device *, int); 832 void dasd_device_remove_stop_bits(struct dasd_device *, int); 833 834 int dasd_device_is_ro(struct dasd_device *); 835 836 void dasd_profile_reset(struct dasd_profile *); 837 int dasd_profile_on(struct dasd_profile *); 838 void dasd_profile_off(struct dasd_profile *); 839 char *dasd_get_user_string(const char __user *, size_t); 840 841 /* externals in dasd_devmap.c */ 842 extern int dasd_max_devindex; 843 extern int dasd_probeonly; 844 extern int dasd_autodetect; 845 extern int dasd_nopav; 846 extern int dasd_nofcx; 847 848 int dasd_devmap_init(void); 849 void dasd_devmap_exit(void); 850 851 struct dasd_device *dasd_create_device(struct ccw_device *); 852 void dasd_delete_device(struct dasd_device *); 853 854 int dasd_get_feature(struct ccw_device *, int); 855 int dasd_set_feature(struct ccw_device *, int, int); 856 857 extern const struct attribute_group *dasd_dev_groups[]; 858 void dasd_path_create_kobj(struct dasd_device *, int); 859 void dasd_path_create_kobjects(struct dasd_device *); 860 void dasd_path_remove_kobjects(struct dasd_device *); 861 862 struct dasd_device *dasd_device_from_cdev(struct ccw_device *); 863 struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *); 864 struct dasd_device *dasd_device_from_devindex(int); 865 866 void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *); 867 struct dasd_device *dasd_device_from_gendisk(struct gendisk *); 868 869 int dasd_parse(void) __init; 870 int dasd_busid_known(const char *); 871 872 /* externals in dasd_gendisk.c */ 873 int dasd_gendisk_init(void); 874 void dasd_gendisk_exit(void); 875 int dasd_gendisk_alloc(struct dasd_block *); 876 void dasd_gendisk_free(struct dasd_block *); 877 int dasd_scan_partitions(struct dasd_block *); 878 void dasd_destroy_partitions(struct dasd_block *); 879 880 /* externals in dasd_ioctl.c */ 881 int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long); 882 int dasd_set_read_only(struct block_device *bdev, bool ro); 883 884 /* externals in dasd_proc.c */ 885 int dasd_proc_init(void); 886 void dasd_proc_exit(void); 887 888 /* externals in dasd_erp.c */ 889 struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); 890 struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); 891 struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int, 892 struct dasd_device *); 893 void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); 894 void dasd_log_sense(struct dasd_ccw_req *, struct irb *); 895 void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb); 896 897 /* externals in dasd_3990_erp.c */ 898 struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); 899 void dasd_3990_erp_handle_sim(struct dasd_device *, char *); 900 901 /* externals in dasd_eer.c */ 902 #ifdef CONFIG_DASD_EER 903 int dasd_eer_init(void); 904 void dasd_eer_exit(void); 905 int dasd_eer_enable(struct dasd_device *); 906 void dasd_eer_disable(struct dasd_device *); 907 void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, 908 unsigned int id); 909 void dasd_eer_snss(struct dasd_device *); 910 911 static inline int dasd_eer_enabled(struct dasd_device *device) 912 { 913 return device->eer_cqr != NULL; 914 } 915 #else 916 #define dasd_eer_init() (0) 917 #define dasd_eer_exit() do { } while (0) 918 #define dasd_eer_enable(d) (0) 919 #define dasd_eer_disable(d) do { } while (0) 920 #define dasd_eer_write(d,c,i) do { } while (0) 921 #define dasd_eer_snss(d) do { } while (0) 922 #define dasd_eer_enabled(d) (0) 923 #endif /* CONFIG_DASD_ERR */ 924 925 926 /* DASD path handling functions */ 927 928 /* 929 * helper functions to modify bit masks for a given channel path for a device 930 */ 931 static inline int dasd_path_is_operational(struct dasd_device *device, int chp) 932 { 933 return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 934 } 935 936 static inline int dasd_path_need_verify(struct dasd_device *device, int chp) 937 { 938 return test_bit(DASD_PATH_TBV, &device->path[chp].flags); 939 } 940 941 static inline void dasd_path_verify(struct dasd_device *device, int chp) 942 { 943 __set_bit(DASD_PATH_TBV, &device->path[chp].flags); 944 } 945 946 static inline void dasd_path_clear_verify(struct dasd_device *device, int chp) 947 { 948 __clear_bit(DASD_PATH_TBV, &device->path[chp].flags); 949 } 950 951 static inline void dasd_path_clear_all_verify(struct dasd_device *device) 952 { 953 int chp; 954 955 for (chp = 0; chp < 8; chp++) 956 dasd_path_clear_verify(device, chp); 957 } 958 959 static inline void dasd_path_fcsec(struct dasd_device *device, int chp) 960 { 961 __set_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 962 } 963 964 static inline void dasd_path_clear_fcsec(struct dasd_device *device, int chp) 965 { 966 __clear_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 967 } 968 969 static inline int dasd_path_need_fcsec(struct dasd_device *device, int chp) 970 { 971 return test_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 972 } 973 974 static inline void dasd_path_clear_all_fcsec(struct dasd_device *device) 975 { 976 int chp; 977 978 for (chp = 0; chp < 8; chp++) 979 dasd_path_clear_fcsec(device, chp); 980 } 981 982 static inline void dasd_path_operational(struct dasd_device *device, int chp) 983 { 984 __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 985 device->opm |= (0x80 >> chp); 986 } 987 988 static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp) 989 { 990 __set_bit(DASD_PATH_NPP, &device->path[chp].flags); 991 } 992 993 static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp) 994 { 995 return test_bit(DASD_PATH_NPP, &device->path[chp].flags); 996 } 997 998 static inline void dasd_path_clear_nonpreferred(struct dasd_device *device, 999 int chp) 1000 { 1001 __clear_bit(DASD_PATH_NPP, &device->path[chp].flags); 1002 } 1003 1004 static inline void dasd_path_preferred(struct dasd_device *device, int chp) 1005 { 1006 __set_bit(DASD_PATH_PP, &device->path[chp].flags); 1007 } 1008 1009 static inline int dasd_path_is_preferred(struct dasd_device *device, int chp) 1010 { 1011 return test_bit(DASD_PATH_PP, &device->path[chp].flags); 1012 } 1013 1014 static inline void dasd_path_clear_preferred(struct dasd_device *device, 1015 int chp) 1016 { 1017 __clear_bit(DASD_PATH_PP, &device->path[chp].flags); 1018 } 1019 1020 static inline void dasd_path_clear_oper(struct dasd_device *device, int chp) 1021 { 1022 __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 1023 device->opm &= ~(0x80 >> chp); 1024 } 1025 1026 static inline void dasd_path_clear_cable(struct dasd_device *device, int chp) 1027 { 1028 __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1029 } 1030 1031 static inline void dasd_path_cuir(struct dasd_device *device, int chp) 1032 { 1033 __set_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1034 } 1035 1036 static inline int dasd_path_is_cuir(struct dasd_device *device, int chp) 1037 { 1038 return test_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1039 } 1040 1041 static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp) 1042 { 1043 __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1044 } 1045 1046 static inline void dasd_path_ifcc(struct dasd_device *device, int chp) 1047 { 1048 set_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1049 } 1050 1051 static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp) 1052 { 1053 return test_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1054 } 1055 1056 static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp) 1057 { 1058 clear_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1059 } 1060 1061 static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp) 1062 { 1063 __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1064 } 1065 1066 static inline void dasd_path_miscabled(struct dasd_device *device, int chp) 1067 { 1068 __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1069 } 1070 1071 static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp) 1072 { 1073 return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1074 } 1075 1076 static inline void dasd_path_nohpf(struct dasd_device *device, int chp) 1077 { 1078 __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1079 } 1080 1081 static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp) 1082 { 1083 return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1084 } 1085 1086 /* 1087 * get functions for path masks 1088 * will return a path masks for the given device 1089 */ 1090 1091 static inline __u8 dasd_path_get_opm(struct dasd_device *device) 1092 { 1093 return device->opm; 1094 } 1095 1096 static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device) 1097 { 1098 int chp; 1099 __u8 tbvpm = 0x00; 1100 1101 for (chp = 0; chp < 8; chp++) 1102 if (dasd_path_need_verify(device, chp)) 1103 tbvpm |= 0x80 >> chp; 1104 return tbvpm; 1105 } 1106 1107 static inline int dasd_path_get_fcsecpm(struct dasd_device *device) 1108 { 1109 int chp; 1110 1111 for (chp = 0; chp < 8; chp++) 1112 if (dasd_path_need_fcsec(device, chp)) 1113 return 1; 1114 1115 return 0; 1116 } 1117 1118 static inline __u8 dasd_path_get_nppm(struct dasd_device *device) 1119 { 1120 int chp; 1121 __u8 npm = 0x00; 1122 1123 for (chp = 0; chp < 8; chp++) { 1124 if (dasd_path_is_nonpreferred(device, chp)) 1125 npm |= 0x80 >> chp; 1126 } 1127 return npm; 1128 } 1129 1130 static inline __u8 dasd_path_get_ppm(struct dasd_device *device) 1131 { 1132 int chp; 1133 __u8 ppm = 0x00; 1134 1135 for (chp = 0; chp < 8; chp++) 1136 if (dasd_path_is_preferred(device, chp)) 1137 ppm |= 0x80 >> chp; 1138 return ppm; 1139 } 1140 1141 static inline __u8 dasd_path_get_cablepm(struct dasd_device *device) 1142 { 1143 int chp; 1144 __u8 cablepm = 0x00; 1145 1146 for (chp = 0; chp < 8; chp++) 1147 if (dasd_path_is_miscabled(device, chp)) 1148 cablepm |= 0x80 >> chp; 1149 return cablepm; 1150 } 1151 1152 static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device) 1153 { 1154 int chp; 1155 __u8 cuirpm = 0x00; 1156 1157 for (chp = 0; chp < 8; chp++) 1158 if (dasd_path_is_cuir(device, chp)) 1159 cuirpm |= 0x80 >> chp; 1160 return cuirpm; 1161 } 1162 1163 static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device) 1164 { 1165 int chp; 1166 __u8 ifccpm = 0x00; 1167 1168 for (chp = 0; chp < 8; chp++) 1169 if (dasd_path_is_ifcc(device, chp)) 1170 ifccpm |= 0x80 >> chp; 1171 return ifccpm; 1172 } 1173 1174 static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device) 1175 { 1176 int chp; 1177 __u8 hpfpm = 0x00; 1178 1179 for (chp = 0; chp < 8; chp++) 1180 if (dasd_path_is_nohpf(device, chp)) 1181 hpfpm |= 0x80 >> chp; 1182 return hpfpm; 1183 } 1184 1185 static inline u8 dasd_path_get_fcs_path(struct dasd_device *device, int chp) 1186 { 1187 return device->path[chp].fc_security; 1188 } 1189 1190 static inline int dasd_path_get_fcs_device(struct dasd_device *device) 1191 { 1192 u8 fc_sec = 0; 1193 int chp; 1194 1195 for (chp = 0; chp < 8; chp++) { 1196 if (device->opm & (0x80 >> chp)) { 1197 fc_sec = device->path[chp].fc_security; 1198 break; 1199 } 1200 } 1201 for (; chp < 8; chp++) { 1202 if (device->opm & (0x80 >> chp)) 1203 if (device->path[chp].fc_security != fc_sec) 1204 return -EINVAL; 1205 } 1206 1207 return fc_sec; 1208 } 1209 1210 /* 1211 * add functions for path masks 1212 * the existing path mask will be extended by the given path mask 1213 */ 1214 static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm) 1215 { 1216 int chp; 1217 1218 for (chp = 0; chp < 8; chp++) 1219 if (pm & (0x80 >> chp)) 1220 dasd_path_verify(device, chp); 1221 } 1222 1223 static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device) 1224 { 1225 int chp; 1226 __u8 nopm = 0x00; 1227 1228 for (chp = 0; chp < 8; chp++) 1229 if (dasd_path_is_nohpf(device, chp) || 1230 dasd_path_is_ifcc(device, chp) || 1231 dasd_path_is_cuir(device, chp) || 1232 dasd_path_is_miscabled(device, chp)) 1233 nopm |= 0x80 >> chp; 1234 return nopm; 1235 } 1236 1237 static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm) 1238 { 1239 int chp; 1240 1241 for (chp = 0; chp < 8; chp++) 1242 if (pm & (0x80 >> chp)) { 1243 dasd_path_operational(device, chp); 1244 /* 1245 * if the path is used 1246 * it should not be in one of the negative lists 1247 */ 1248 dasd_path_clear_nohpf(device, chp); 1249 dasd_path_clear_cuir(device, chp); 1250 dasd_path_clear_cable(device, chp); 1251 dasd_path_clear_ifcc(device, chp); 1252 } 1253 } 1254 1255 static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm) 1256 { 1257 int chp; 1258 1259 for (chp = 0; chp < 8; chp++) 1260 if (pm & (0x80 >> chp)) 1261 dasd_path_miscabled(device, chp); 1262 } 1263 1264 static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm) 1265 { 1266 int chp; 1267 1268 for (chp = 0; chp < 8; chp++) 1269 if (pm & (0x80 >> chp)) 1270 dasd_path_cuir(device, chp); 1271 } 1272 1273 static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm) 1274 { 1275 int chp; 1276 1277 for (chp = 0; chp < 8; chp++) 1278 if (pm & (0x80 >> chp)) 1279 dasd_path_ifcc(device, chp); 1280 } 1281 1282 static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm) 1283 { 1284 int chp; 1285 1286 for (chp = 0; chp < 8; chp++) 1287 if (pm & (0x80 >> chp)) 1288 dasd_path_nonpreferred(device, chp); 1289 } 1290 1291 static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm) 1292 { 1293 int chp; 1294 1295 for (chp = 0; chp < 8; chp++) 1296 if (pm & (0x80 >> chp)) 1297 dasd_path_nohpf(device, chp); 1298 } 1299 1300 static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm) 1301 { 1302 int chp; 1303 1304 for (chp = 0; chp < 8; chp++) 1305 if (pm & (0x80 >> chp)) 1306 dasd_path_preferred(device, chp); 1307 } 1308 1309 /* 1310 * set functions for path masks 1311 * the existing path mask will be replaced by the given path mask 1312 */ 1313 static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm) 1314 { 1315 int chp; 1316 1317 for (chp = 0; chp < 8; chp++) 1318 if (pm & (0x80 >> chp)) 1319 dasd_path_verify(device, chp); 1320 else 1321 dasd_path_clear_verify(device, chp); 1322 } 1323 1324 static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm) 1325 { 1326 int chp; 1327 1328 for (chp = 0; chp < 8; chp++) { 1329 dasd_path_clear_oper(device, chp); 1330 if (pm & (0x80 >> chp)) { 1331 dasd_path_operational(device, chp); 1332 /* 1333 * if the path is used 1334 * it should not be in one of the negative lists 1335 */ 1336 dasd_path_clear_nohpf(device, chp); 1337 dasd_path_clear_cuir(device, chp); 1338 dasd_path_clear_cable(device, chp); 1339 dasd_path_clear_ifcc(device, chp); 1340 } 1341 } 1342 } 1343 1344 /* 1345 * remove functions for path masks 1346 * the existing path mask will be cleared with the given path mask 1347 */ 1348 static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm) 1349 { 1350 int chp; 1351 1352 for (chp = 0; chp < 8; chp++) { 1353 if (pm & (0x80 >> chp)) 1354 dasd_path_clear_oper(device, chp); 1355 } 1356 } 1357 1358 /* 1359 * add the newly available path to the to be verified pm and remove it from 1360 * normal operation until it is verified 1361 */ 1362 static inline void dasd_path_available(struct dasd_device *device, int chp) 1363 { 1364 dasd_path_clear_oper(device, chp); 1365 dasd_path_verify(device, chp); 1366 } 1367 1368 static inline void dasd_path_notoper(struct dasd_device *device, int chp) 1369 { 1370 dasd_path_clear_oper(device, chp); 1371 dasd_path_clear_preferred(device, chp); 1372 dasd_path_clear_nonpreferred(device, chp); 1373 } 1374 1375 static inline void dasd_path_fcsec_update(struct dasd_device *device, int chp) 1376 { 1377 dasd_path_fcsec(device, chp); 1378 } 1379 1380 /* 1381 * remove all paths from normal operation 1382 */ 1383 static inline void dasd_path_no_path(struct dasd_device *device) 1384 { 1385 int chp; 1386 1387 for (chp = 0; chp < 8; chp++) 1388 dasd_path_notoper(device, chp); 1389 1390 dasd_path_clear_all_verify(device); 1391 } 1392 1393 /* end - path handling */ 1394 1395 #endif /* DASD_H */ 1396