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 unsigned int trkcount; /* count formatted tracks */ 191 }; 192 193 /* 194 * dasd_ccw_req -> status can be: 195 */ 196 #define DASD_CQR_FILLED 0x00 /* request is ready to be processed */ 197 #define DASD_CQR_DONE 0x01 /* request is completed successfully */ 198 #define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */ 199 #define DASD_CQR_IN_ERP 0x03 /* request is in recovery */ 200 #define DASD_CQR_FAILED 0x04 /* request is finally failed */ 201 #define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */ 202 203 #define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */ 204 #define DASD_CQR_IN_IO 0x81 /* request is currently in IO */ 205 #define DASD_CQR_ERROR 0x82 /* request is completed with error */ 206 #define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */ 207 #define DASD_CQR_CLEARED 0x84 /* request was cleared */ 208 #define DASD_CQR_SUCCESS 0x85 /* request was successful */ 209 210 /* default expiration time*/ 211 #define DASD_EXPIRES 300 212 #define DASD_EXPIRES_MAX 40000000 213 #define DASD_RETRIES 256 214 #define DASD_RETRIES_MAX 32768 215 216 /* per dasd_ccw_req flags */ 217 #define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */ 218 #define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */ 219 #define DASD_CQR_VERIFY_PATH 2 /* path verification request */ 220 #define DASD_CQR_ALLOW_SLOCK 3 /* Try this request even when lock was 221 * stolen. Should not be combined with 222 * DASD_CQR_FLAGS_USE_ERP 223 */ 224 /* 225 * The following flags are used to suppress output of certain errors. 226 */ 227 #define DASD_CQR_SUPPRESS_NRF 4 /* Suppress 'No Record Found' error */ 228 #define DASD_CQR_SUPPRESS_FP 5 /* Suppress 'File Protected' error*/ 229 #define DASD_CQR_SUPPRESS_IL 6 /* Suppress 'Incorrect Length' error */ 230 #define DASD_CQR_SUPPRESS_CR 7 /* Suppress 'Command Reject' error */ 231 232 #define DASD_REQ_PER_DEV 4 233 234 /* Signature for error recovery functions. */ 235 typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *); 236 237 /* 238 * A single CQR can only contain a maximum of 255 CCWs. It is limited by 239 * the locate record and locate record extended count value which can only hold 240 * 1 Byte max. 241 */ 242 #define DASD_CQR_MAX_CCW 255 243 244 /* 245 * Unique identifier for dasd device. 246 */ 247 #define UA_NOT_CONFIGURED 0x00 248 #define UA_BASE_DEVICE 0x01 249 #define UA_BASE_PAV_ALIAS 0x02 250 #define UA_HYPER_PAV_ALIAS 0x03 251 252 struct dasd_uid { 253 __u8 type; 254 char vendor[4]; 255 char serial[15]; 256 __u16 ssid; 257 __u8 real_unit_addr; 258 __u8 base_unit_addr; 259 char vduit[33]; 260 }; 261 262 /* 263 * the struct dasd_discipline is 264 * sth like a table of virtual functions, if you think of dasd_eckd 265 * inheriting dasd... 266 * no, currently we are not planning to reimplement the driver in C++ 267 */ 268 struct dasd_discipline { 269 struct module *owner; 270 char ebcname[8]; /* a name used for tagging and printks */ 271 char name[8]; /* a name used for tagging and printks */ 272 273 struct list_head list; /* used for list of disciplines */ 274 275 /* 276 * Device recognition functions. check_device is used to verify 277 * the sense data and the information returned by read device 278 * characteristics. It returns 0 if the discipline can be used 279 * for the device in question. uncheck_device is called during 280 * device shutdown to deregister a device from its discipline. 281 */ 282 int (*check_device) (struct dasd_device *); 283 void (*uncheck_device) (struct dasd_device *); 284 285 /* 286 * do_analysis is used in the step from device state "basic" to 287 * state "accept". It returns 0 if the device can be made ready, 288 * it returns -EMEDIUMTYPE if the device can't be made ready or 289 * -EAGAIN if do_analysis started a ccw that needs to complete 290 * before the analysis may be repeated. 291 */ 292 int (*do_analysis) (struct dasd_block *); 293 294 /* 295 * This function is called, when new paths become available. 296 * Disciplins may use this callback to do necessary setup work, 297 * e.g. verify that new path is compatible with the current 298 * configuration. 299 */ 300 int (*pe_handler)(struct dasd_device *, __u8, __u8); 301 302 /* 303 * Last things to do when a device is set online, and first things 304 * when it is set offline. 305 */ 306 int (*basic_to_ready) (struct dasd_device *); 307 int (*online_to_ready) (struct dasd_device *); 308 int (*basic_to_known)(struct dasd_device *); 309 310 /* 311 * Initialize block layer request queue. 312 */ 313 void (*setup_blk_queue)(struct dasd_block *); 314 /* (struct dasd_device *); 315 * Device operation functions. build_cp creates a ccw chain for 316 * a block device request, start_io starts the request and 317 * term_IO cancels it (e.g. in case of a timeout). format_device 318 * formats the device and check_device_format compares the format of 319 * a device with the expected format_data. 320 * handle_terminated_request allows to examine a cqr and prepare 321 * it for retry. 322 */ 323 struct dasd_ccw_req *(*build_cp) (struct dasd_device *, 324 struct dasd_block *, 325 struct request *); 326 int (*start_IO) (struct dasd_ccw_req *); 327 int (*term_IO) (struct dasd_ccw_req *); 328 void (*handle_terminated_request) (struct dasd_ccw_req *); 329 int (*format_device) (struct dasd_device *, 330 struct format_data_t *, int); 331 int (*check_device_format)(struct dasd_device *, 332 struct format_check_t *, int); 333 int (*free_cp) (struct dasd_ccw_req *, struct request *); 334 335 /* 336 * Error recovery functions. examine_error() returns a value that 337 * indicates what to do for an error condition. If examine_error() 338 * returns 'dasd_era_recover' erp_action() is called to create a 339 * special error recovery ccw. erp_postaction() is called after 340 * an error recovery ccw has finished its execution. dump_sense 341 * is called for every error condition to print the sense data 342 * to the console. 343 */ 344 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); 345 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); 346 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, 347 struct irb *); 348 void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *); 349 void (*check_for_device_change) (struct dasd_device *, 350 struct dasd_ccw_req *, 351 struct irb *); 352 353 /* i/o control functions. */ 354 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *); 355 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); 356 int (*ioctl) (struct dasd_block *, unsigned int, void __user *); 357 358 /* reload device after state change */ 359 int (*reload) (struct dasd_device *); 360 361 int (*get_uid) (struct dasd_device *, struct dasd_uid *); 362 void (*kick_validate) (struct dasd_device *); 363 int (*check_attention)(struct dasd_device *, __u8); 364 int (*host_access_count)(struct dasd_device *); 365 int (*hosts_print)(struct dasd_device *, struct seq_file *); 366 void (*handle_hpf_error)(struct dasd_device *, struct irb *); 367 void (*disable_hpf)(struct dasd_device *); 368 int (*hpf_enabled)(struct dasd_device *); 369 void (*reset_path)(struct dasd_device *, __u8); 370 371 /* 372 * Extent Space Efficient (ESE) relevant functions 373 */ 374 int (*is_ese)(struct dasd_device *); 375 /* Capacity */ 376 int (*space_allocated)(struct dasd_device *); 377 int (*space_configured)(struct dasd_device *); 378 int (*logical_capacity)(struct dasd_device *); 379 int (*release_space)(struct dasd_device *, struct format_data_t *); 380 /* Extent Pool */ 381 int (*ext_pool_id)(struct dasd_device *); 382 int (*ext_size)(struct dasd_device *); 383 int (*ext_pool_cap_at_warnlevel)(struct dasd_device *); 384 int (*ext_pool_warn_thrshld)(struct dasd_device *); 385 int (*ext_pool_oos)(struct dasd_device *); 386 int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *); 387 struct dasd_ccw_req *(*ese_format)(struct dasd_device *, 388 struct dasd_ccw_req *, struct irb *); 389 int (*ese_read)(struct dasd_ccw_req *, struct irb *); 390 }; 391 392 extern struct dasd_discipline *dasd_diag_discipline_pointer; 393 394 /* 395 * Notification numbers for extended error reporting notifications: 396 * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's 397 * eer pointer) is freed. The error reporting module needs to do all necessary 398 * cleanup steps. 399 * The DASD_EER_TRIGGER notification sends the actual error reports (triggers). 400 */ 401 #define DASD_EER_DISABLE 0 402 #define DASD_EER_TRIGGER 1 403 404 /* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */ 405 #define DASD_EER_FATALERROR 1 406 #define DASD_EER_NOPATH 2 407 #define DASD_EER_STATECHANGE 3 408 #define DASD_EER_PPRCSUSPEND 4 409 #define DASD_EER_NOSPC 5 410 411 /* DASD path handling */ 412 413 #define DASD_PATH_OPERATIONAL 1 414 #define DASD_PATH_TBV 2 415 #define DASD_PATH_PP 3 416 #define DASD_PATH_NPP 4 417 #define DASD_PATH_MISCABLED 5 418 #define DASD_PATH_NOHPF 6 419 #define DASD_PATH_CUIR 7 420 #define DASD_PATH_IFCC 8 421 #define DASD_PATH_FCSEC 9 422 423 #define DASD_THRHLD_MAX 4294967295U 424 #define DASD_INTERVAL_MAX 4294967295U 425 426 /* FC Endpoint Security Capabilities */ 427 #define DASD_FC_SECURITY_UNSUP 0 428 #define DASD_FC_SECURITY_AUTH 1 429 #define DASD_FC_SECURITY_ENC_FCSP2 2 430 #define DASD_FC_SECURITY_ENC_ERAS 3 431 432 #define DASD_FC_SECURITY_ENC_STR "Encryption" 433 static const struct { 434 u8 value; 435 char *name; 436 } dasd_path_fcs_mnemonics[] = { 437 { DASD_FC_SECURITY_UNSUP, "Unsupported" }, 438 { DASD_FC_SECURITY_AUTH, "Authentication" }, 439 { DASD_FC_SECURITY_ENC_FCSP2, DASD_FC_SECURITY_ENC_STR }, 440 { DASD_FC_SECURITY_ENC_ERAS, DASD_FC_SECURITY_ENC_STR }, 441 }; 442 443 static inline char *dasd_path_get_fcs_str(int val) 444 { 445 int i; 446 447 for (i = 0; i < ARRAY_SIZE(dasd_path_fcs_mnemonics); i++) { 448 if (dasd_path_fcs_mnemonics[i].value == val) 449 return dasd_path_fcs_mnemonics[i].name; 450 } 451 452 return dasd_path_fcs_mnemonics[0].name; 453 } 454 455 struct dasd_path { 456 unsigned long flags; 457 u8 cssid; 458 u8 ssid; 459 u8 chpid; 460 struct dasd_conf_data *conf_data; 461 atomic_t error_count; 462 unsigned long errorclk; 463 u8 fc_security; 464 struct kobject kobj; 465 bool in_sysfs; 466 }; 467 468 #define to_dasd_path(path) container_of(path, struct dasd_path, kobj) 469 470 static inline void dasd_path_release(struct kobject *kobj) 471 { 472 /* Memory for the dasd_path kobject is freed when dasd_free_device() is called */ 473 } 474 475 476 struct dasd_profile_info { 477 /* legacy part of profile data, as in dasd_profile_info_t */ 478 unsigned int dasd_io_reqs; /* number of requests processed */ 479 unsigned int dasd_io_sects; /* number of sectors processed */ 480 unsigned int dasd_io_secs[32]; /* histogram of request's sizes */ 481 unsigned int dasd_io_times[32]; /* histogram of requests's times */ 482 unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */ 483 unsigned int dasd_io_time1[32]; /* hist. of time from build to start */ 484 unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */ 485 unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */ 486 unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */ 487 unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */ 488 489 /* new data */ 490 struct timespec64 starttod; /* time of start or last reset */ 491 unsigned int dasd_io_alias; /* requests using an alias */ 492 unsigned int dasd_io_tpm; /* requests using transport mode */ 493 unsigned int dasd_read_reqs; /* total number of read requests */ 494 unsigned int dasd_read_sects; /* total number read sectors */ 495 unsigned int dasd_read_alias; /* read request using an alias */ 496 unsigned int dasd_read_tpm; /* read requests in transport mode */ 497 unsigned int dasd_read_secs[32]; /* histogram of request's sizes */ 498 unsigned int dasd_read_times[32]; /* histogram of requests's times */ 499 unsigned int dasd_read_time1[32]; /* hist. time from build to start */ 500 unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */ 501 unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */ 502 unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */ 503 unsigned long dasd_sum_times; /* sum of request times */ 504 unsigned long dasd_sum_time_str; /* sum of time from build to start */ 505 unsigned long dasd_sum_time_irq; /* sum of time from start to irq */ 506 unsigned long dasd_sum_time_end; /* sum of time from irq to end */ 507 }; 508 509 struct dasd_profile { 510 struct dentry *dentry; 511 struct dasd_profile_info *data; 512 spinlock_t lock; 513 }; 514 515 struct dasd_format_entry { 516 struct list_head list; 517 sector_t track; 518 }; 519 520 struct dasd_device { 521 /* Block device stuff. */ 522 struct dasd_block *block; 523 524 unsigned int devindex; 525 unsigned long flags; /* per device flags */ 526 unsigned short features; /* copy of devmap-features (read-only!) */ 527 528 /* extended error reporting stuff (eer) */ 529 struct dasd_ccw_req *eer_cqr; 530 531 /* Device discipline stuff. */ 532 struct dasd_discipline *discipline; 533 struct dasd_discipline *base_discipline; 534 void *private; 535 struct dasd_path path[8]; 536 __u8 opm; 537 538 /* Device state and target state. */ 539 int state, target; 540 struct mutex state_mutex; 541 int stopped; /* device (ccw_device_start) was stopped */ 542 543 /* reference count. */ 544 atomic_t ref_count; 545 546 /* ccw queue and memory for static ccw/erp buffers. */ 547 struct list_head ccw_queue; 548 spinlock_t mem_lock; 549 void *ccw_mem; 550 void *erp_mem; 551 void *ese_mem; 552 struct list_head ccw_chunks; 553 struct list_head erp_chunks; 554 struct list_head ese_chunks; 555 556 atomic_t tasklet_scheduled; 557 struct tasklet_struct tasklet; 558 struct work_struct kick_work; 559 struct work_struct reload_device; 560 struct work_struct kick_validate; 561 struct work_struct suc_work; 562 struct work_struct requeue_requests; 563 struct timer_list timer; 564 565 debug_info_t *debug_area; 566 567 struct ccw_device *cdev; 568 569 /* hook for alias management */ 570 struct list_head alias_list; 571 572 /* default expiration time in s */ 573 unsigned long default_expires; 574 unsigned long default_retries; 575 576 unsigned long blk_timeout; 577 578 unsigned long path_thrhld; 579 unsigned long path_interval; 580 581 struct dentry *debugfs_dentry; 582 struct dentry *hosts_dentry; 583 struct dasd_profile profile; 584 struct dasd_format_entry format_entry; 585 struct kset *paths_info; 586 }; 587 588 struct dasd_block { 589 /* Block device stuff. */ 590 struct gendisk *gdp; 591 struct request_queue *request_queue; 592 spinlock_t request_queue_lock; 593 struct blk_mq_tag_set tag_set; 594 struct block_device *bdev; 595 atomic_t open_count; 596 597 unsigned long blocks; /* size of volume in blocks */ 598 unsigned int bp_block; /* bytes per block */ 599 unsigned int s2b_shift; /* log2 (bp_block/512) */ 600 601 struct dasd_device *base; 602 struct list_head ccw_queue; 603 spinlock_t queue_lock; 604 605 atomic_t tasklet_scheduled; 606 struct tasklet_struct tasklet; 607 struct timer_list timer; 608 609 struct dentry *debugfs_dentry; 610 struct dasd_profile profile; 611 612 struct list_head format_list; 613 spinlock_t format_lock; 614 atomic_t trkcount; 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 /* 762 * return the callback data of the original request in case there are 763 * ERP requests build on top of it 764 */ 765 static inline void *dasd_get_callback_data(struct dasd_ccw_req *cqr) 766 { 767 while (cqr->refers) 768 cqr = cqr->refers; 769 770 return cqr->callback_data; 771 } 772 773 /* externals in dasd.c */ 774 #define DASD_PROFILE_OFF 0 775 #define DASD_PROFILE_ON 1 776 #define DASD_PROFILE_GLOBAL_ONLY 2 777 778 extern debug_info_t *dasd_debug_area; 779 extern struct dasd_profile dasd_global_profile; 780 extern unsigned int dasd_global_profile_level; 781 extern const struct block_device_operations dasd_device_operations; 782 783 extern struct kmem_cache *dasd_page_cache; 784 785 struct dasd_ccw_req * 786 dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *); 787 struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *); 788 void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); 789 void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *); 790 void dasd_wakeup_cb(struct dasd_ccw_req *, void *); 791 792 struct dasd_device *dasd_alloc_device(void); 793 void dasd_free_device(struct dasd_device *); 794 795 struct dasd_block *dasd_alloc_block(void); 796 void dasd_free_block(struct dasd_block *); 797 798 enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved); 799 800 void dasd_enable_device(struct dasd_device *); 801 void dasd_set_target_state(struct dasd_device *, int); 802 void dasd_kick_device(struct dasd_device *); 803 void dasd_reload_device(struct dasd_device *); 804 void dasd_schedule_requeue(struct dasd_device *); 805 806 void dasd_add_request_head(struct dasd_ccw_req *); 807 void dasd_add_request_tail(struct dasd_ccw_req *); 808 int dasd_start_IO(struct dasd_ccw_req *); 809 int dasd_term_IO(struct dasd_ccw_req *); 810 void dasd_schedule_device_bh(struct dasd_device *); 811 void dasd_schedule_block_bh(struct dasd_block *); 812 int dasd_sleep_on(struct dasd_ccw_req *); 813 int dasd_sleep_on_queue(struct list_head *); 814 int dasd_sleep_on_immediatly(struct dasd_ccw_req *); 815 int dasd_sleep_on_queue_interruptible(struct list_head *); 816 int dasd_sleep_on_interruptible(struct dasd_ccw_req *); 817 void dasd_device_set_timer(struct dasd_device *, int); 818 void dasd_device_clear_timer(struct dasd_device *); 819 void dasd_block_set_timer(struct dasd_block *, int); 820 void dasd_block_clear_timer(struct dasd_block *); 821 int dasd_cancel_req(struct dasd_ccw_req *); 822 int dasd_flush_device_queue(struct dasd_device *); 823 int dasd_generic_probe(struct ccw_device *); 824 void dasd_generic_free_discipline(struct dasd_device *); 825 void dasd_generic_remove (struct ccw_device *cdev); 826 int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); 827 int dasd_generic_set_offline (struct ccw_device *cdev); 828 int dasd_generic_notify(struct ccw_device *, int); 829 int dasd_generic_last_path_gone(struct dasd_device *); 830 int dasd_generic_path_operational(struct dasd_device *); 831 void dasd_generic_shutdown(struct ccw_device *); 832 833 void dasd_generic_handle_state_change(struct dasd_device *); 834 enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *); 835 void dasd_generic_path_event(struct ccw_device *, int *); 836 int dasd_generic_verify_path(struct dasd_device *, __u8); 837 void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *); 838 void dasd_generic_space_avail(struct dasd_device *); 839 840 int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); 841 char *dasd_get_sense(struct irb *); 842 843 void dasd_device_set_stop_bits(struct dasd_device *, int); 844 void dasd_device_remove_stop_bits(struct dasd_device *, int); 845 846 int dasd_device_is_ro(struct dasd_device *); 847 848 void dasd_profile_reset(struct dasd_profile *); 849 int dasd_profile_on(struct dasd_profile *); 850 void dasd_profile_off(struct dasd_profile *); 851 char *dasd_get_user_string(const char __user *, size_t); 852 853 /* externals in dasd_devmap.c */ 854 extern int dasd_max_devindex; 855 extern int dasd_probeonly; 856 extern int dasd_autodetect; 857 extern int dasd_nopav; 858 extern int dasd_nofcx; 859 860 int dasd_devmap_init(void); 861 void dasd_devmap_exit(void); 862 863 struct dasd_device *dasd_create_device(struct ccw_device *); 864 void dasd_delete_device(struct dasd_device *); 865 866 int dasd_get_feature(struct ccw_device *, int); 867 int dasd_set_feature(struct ccw_device *, int, int); 868 869 extern const struct attribute_group *dasd_dev_groups[]; 870 void dasd_path_create_kobj(struct dasd_device *, int); 871 void dasd_path_create_kobjects(struct dasd_device *); 872 void dasd_path_remove_kobjects(struct dasd_device *); 873 874 struct dasd_device *dasd_device_from_cdev(struct ccw_device *); 875 struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *); 876 struct dasd_device *dasd_device_from_devindex(int); 877 878 void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *); 879 struct dasd_device *dasd_device_from_gendisk(struct gendisk *); 880 881 int dasd_parse(void) __init; 882 int dasd_busid_known(const char *); 883 884 /* externals in dasd_gendisk.c */ 885 int dasd_gendisk_init(void); 886 void dasd_gendisk_exit(void); 887 int dasd_gendisk_alloc(struct dasd_block *); 888 void dasd_gendisk_free(struct dasd_block *); 889 int dasd_scan_partitions(struct dasd_block *); 890 void dasd_destroy_partitions(struct dasd_block *); 891 892 /* externals in dasd_ioctl.c */ 893 int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long); 894 int dasd_set_read_only(struct block_device *bdev, bool ro); 895 896 /* externals in dasd_proc.c */ 897 int dasd_proc_init(void); 898 void dasd_proc_exit(void); 899 900 /* externals in dasd_erp.c */ 901 struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); 902 struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); 903 struct dasd_ccw_req *dasd_alloc_erp_request(unsigned int, int, int, 904 struct dasd_device *); 905 void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); 906 void dasd_log_sense(struct dasd_ccw_req *, struct irb *); 907 void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb); 908 909 /* externals in dasd_3990_erp.c */ 910 struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); 911 void dasd_3990_erp_handle_sim(struct dasd_device *, char *); 912 913 /* externals in dasd_eer.c */ 914 #ifdef CONFIG_DASD_EER 915 int dasd_eer_init(void); 916 void dasd_eer_exit(void); 917 int dasd_eer_enable(struct dasd_device *); 918 void dasd_eer_disable(struct dasd_device *); 919 void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, 920 unsigned int id); 921 void dasd_eer_snss(struct dasd_device *); 922 923 static inline int dasd_eer_enabled(struct dasd_device *device) 924 { 925 return device->eer_cqr != NULL; 926 } 927 #else 928 #define dasd_eer_init() (0) 929 #define dasd_eer_exit() do { } while (0) 930 #define dasd_eer_enable(d) (0) 931 #define dasd_eer_disable(d) do { } while (0) 932 #define dasd_eer_write(d,c,i) do { } while (0) 933 #define dasd_eer_snss(d) do { } while (0) 934 #define dasd_eer_enabled(d) (0) 935 #endif /* CONFIG_DASD_ERR */ 936 937 938 /* DASD path handling functions */ 939 940 /* 941 * helper functions to modify bit masks for a given channel path for a device 942 */ 943 static inline int dasd_path_is_operational(struct dasd_device *device, int chp) 944 { 945 return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 946 } 947 948 static inline int dasd_path_need_verify(struct dasd_device *device, int chp) 949 { 950 return test_bit(DASD_PATH_TBV, &device->path[chp].flags); 951 } 952 953 static inline void dasd_path_verify(struct dasd_device *device, int chp) 954 { 955 __set_bit(DASD_PATH_TBV, &device->path[chp].flags); 956 } 957 958 static inline void dasd_path_clear_verify(struct dasd_device *device, int chp) 959 { 960 __clear_bit(DASD_PATH_TBV, &device->path[chp].flags); 961 } 962 963 static inline void dasd_path_clear_all_verify(struct dasd_device *device) 964 { 965 int chp; 966 967 for (chp = 0; chp < 8; chp++) 968 dasd_path_clear_verify(device, chp); 969 } 970 971 static inline void dasd_path_fcsec(struct dasd_device *device, int chp) 972 { 973 __set_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 974 } 975 976 static inline void dasd_path_clear_fcsec(struct dasd_device *device, int chp) 977 { 978 __clear_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 979 } 980 981 static inline int dasd_path_need_fcsec(struct dasd_device *device, int chp) 982 { 983 return test_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 984 } 985 986 static inline void dasd_path_clear_all_fcsec(struct dasd_device *device) 987 { 988 int chp; 989 990 for (chp = 0; chp < 8; chp++) 991 dasd_path_clear_fcsec(device, chp); 992 } 993 994 static inline void dasd_path_operational(struct dasd_device *device, int chp) 995 { 996 __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 997 device->opm |= (0x80 >> chp); 998 } 999 1000 static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp) 1001 { 1002 __set_bit(DASD_PATH_NPP, &device->path[chp].flags); 1003 } 1004 1005 static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp) 1006 { 1007 return test_bit(DASD_PATH_NPP, &device->path[chp].flags); 1008 } 1009 1010 static inline void dasd_path_clear_nonpreferred(struct dasd_device *device, 1011 int chp) 1012 { 1013 __clear_bit(DASD_PATH_NPP, &device->path[chp].flags); 1014 } 1015 1016 static inline void dasd_path_preferred(struct dasd_device *device, int chp) 1017 { 1018 __set_bit(DASD_PATH_PP, &device->path[chp].flags); 1019 } 1020 1021 static inline int dasd_path_is_preferred(struct dasd_device *device, int chp) 1022 { 1023 return test_bit(DASD_PATH_PP, &device->path[chp].flags); 1024 } 1025 1026 static inline void dasd_path_clear_preferred(struct dasd_device *device, 1027 int chp) 1028 { 1029 __clear_bit(DASD_PATH_PP, &device->path[chp].flags); 1030 } 1031 1032 static inline void dasd_path_clear_oper(struct dasd_device *device, int chp) 1033 { 1034 __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 1035 device->opm &= ~(0x80 >> chp); 1036 } 1037 1038 static inline void dasd_path_clear_cable(struct dasd_device *device, int chp) 1039 { 1040 __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1041 } 1042 1043 static inline void dasd_path_cuir(struct dasd_device *device, int chp) 1044 { 1045 __set_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1046 } 1047 1048 static inline int dasd_path_is_cuir(struct dasd_device *device, int chp) 1049 { 1050 return test_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1051 } 1052 1053 static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp) 1054 { 1055 __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1056 } 1057 1058 static inline void dasd_path_ifcc(struct dasd_device *device, int chp) 1059 { 1060 set_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1061 } 1062 1063 static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp) 1064 { 1065 return test_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1066 } 1067 1068 static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp) 1069 { 1070 clear_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1071 } 1072 1073 static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp) 1074 { 1075 __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1076 } 1077 1078 static inline void dasd_path_miscabled(struct dasd_device *device, int chp) 1079 { 1080 __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1081 } 1082 1083 static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp) 1084 { 1085 return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1086 } 1087 1088 static inline void dasd_path_nohpf(struct dasd_device *device, int chp) 1089 { 1090 __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1091 } 1092 1093 static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp) 1094 { 1095 return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1096 } 1097 1098 /* 1099 * get functions for path masks 1100 * will return a path masks for the given device 1101 */ 1102 1103 static inline __u8 dasd_path_get_opm(struct dasd_device *device) 1104 { 1105 return device->opm; 1106 } 1107 1108 static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device) 1109 { 1110 int chp; 1111 __u8 tbvpm = 0x00; 1112 1113 for (chp = 0; chp < 8; chp++) 1114 if (dasd_path_need_verify(device, chp)) 1115 tbvpm |= 0x80 >> chp; 1116 return tbvpm; 1117 } 1118 1119 static inline int dasd_path_get_fcsecpm(struct dasd_device *device) 1120 { 1121 int chp; 1122 1123 for (chp = 0; chp < 8; chp++) 1124 if (dasd_path_need_fcsec(device, chp)) 1125 return 1; 1126 1127 return 0; 1128 } 1129 1130 static inline __u8 dasd_path_get_nppm(struct dasd_device *device) 1131 { 1132 int chp; 1133 __u8 npm = 0x00; 1134 1135 for (chp = 0; chp < 8; chp++) { 1136 if (dasd_path_is_nonpreferred(device, chp)) 1137 npm |= 0x80 >> chp; 1138 } 1139 return npm; 1140 } 1141 1142 static inline __u8 dasd_path_get_ppm(struct dasd_device *device) 1143 { 1144 int chp; 1145 __u8 ppm = 0x00; 1146 1147 for (chp = 0; chp < 8; chp++) 1148 if (dasd_path_is_preferred(device, chp)) 1149 ppm |= 0x80 >> chp; 1150 return ppm; 1151 } 1152 1153 static inline __u8 dasd_path_get_cablepm(struct dasd_device *device) 1154 { 1155 int chp; 1156 __u8 cablepm = 0x00; 1157 1158 for (chp = 0; chp < 8; chp++) 1159 if (dasd_path_is_miscabled(device, chp)) 1160 cablepm |= 0x80 >> chp; 1161 return cablepm; 1162 } 1163 1164 static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device) 1165 { 1166 int chp; 1167 __u8 cuirpm = 0x00; 1168 1169 for (chp = 0; chp < 8; chp++) 1170 if (dasd_path_is_cuir(device, chp)) 1171 cuirpm |= 0x80 >> chp; 1172 return cuirpm; 1173 } 1174 1175 static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device) 1176 { 1177 int chp; 1178 __u8 ifccpm = 0x00; 1179 1180 for (chp = 0; chp < 8; chp++) 1181 if (dasd_path_is_ifcc(device, chp)) 1182 ifccpm |= 0x80 >> chp; 1183 return ifccpm; 1184 } 1185 1186 static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device) 1187 { 1188 int chp; 1189 __u8 hpfpm = 0x00; 1190 1191 for (chp = 0; chp < 8; chp++) 1192 if (dasd_path_is_nohpf(device, chp)) 1193 hpfpm |= 0x80 >> chp; 1194 return hpfpm; 1195 } 1196 1197 static inline u8 dasd_path_get_fcs_path(struct dasd_device *device, int chp) 1198 { 1199 return device->path[chp].fc_security; 1200 } 1201 1202 static inline int dasd_path_get_fcs_device(struct dasd_device *device) 1203 { 1204 u8 fc_sec = 0; 1205 int chp; 1206 1207 for (chp = 0; chp < 8; chp++) { 1208 if (device->opm & (0x80 >> chp)) { 1209 fc_sec = device->path[chp].fc_security; 1210 break; 1211 } 1212 } 1213 for (; chp < 8; chp++) { 1214 if (device->opm & (0x80 >> chp)) 1215 if (device->path[chp].fc_security != fc_sec) 1216 return -EINVAL; 1217 } 1218 1219 return fc_sec; 1220 } 1221 1222 /* 1223 * add functions for path masks 1224 * the existing path mask will be extended by the given path mask 1225 */ 1226 static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm) 1227 { 1228 int chp; 1229 1230 for (chp = 0; chp < 8; chp++) 1231 if (pm & (0x80 >> chp)) 1232 dasd_path_verify(device, chp); 1233 } 1234 1235 static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device) 1236 { 1237 int chp; 1238 __u8 nopm = 0x00; 1239 1240 for (chp = 0; chp < 8; chp++) 1241 if (dasd_path_is_nohpf(device, chp) || 1242 dasd_path_is_ifcc(device, chp) || 1243 dasd_path_is_cuir(device, chp) || 1244 dasd_path_is_miscabled(device, chp)) 1245 nopm |= 0x80 >> chp; 1246 return nopm; 1247 } 1248 1249 static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm) 1250 { 1251 int chp; 1252 1253 for (chp = 0; chp < 8; chp++) 1254 if (pm & (0x80 >> chp)) { 1255 dasd_path_operational(device, chp); 1256 /* 1257 * if the path is used 1258 * it should not be in one of the negative lists 1259 */ 1260 dasd_path_clear_nohpf(device, chp); 1261 dasd_path_clear_cuir(device, chp); 1262 dasd_path_clear_cable(device, chp); 1263 dasd_path_clear_ifcc(device, chp); 1264 } 1265 } 1266 1267 static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm) 1268 { 1269 int chp; 1270 1271 for (chp = 0; chp < 8; chp++) 1272 if (pm & (0x80 >> chp)) 1273 dasd_path_miscabled(device, chp); 1274 } 1275 1276 static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm) 1277 { 1278 int chp; 1279 1280 for (chp = 0; chp < 8; chp++) 1281 if (pm & (0x80 >> chp)) 1282 dasd_path_cuir(device, chp); 1283 } 1284 1285 static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm) 1286 { 1287 int chp; 1288 1289 for (chp = 0; chp < 8; chp++) 1290 if (pm & (0x80 >> chp)) 1291 dasd_path_ifcc(device, chp); 1292 } 1293 1294 static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm) 1295 { 1296 int chp; 1297 1298 for (chp = 0; chp < 8; chp++) 1299 if (pm & (0x80 >> chp)) 1300 dasd_path_nonpreferred(device, chp); 1301 } 1302 1303 static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm) 1304 { 1305 int chp; 1306 1307 for (chp = 0; chp < 8; chp++) 1308 if (pm & (0x80 >> chp)) 1309 dasd_path_nohpf(device, chp); 1310 } 1311 1312 static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm) 1313 { 1314 int chp; 1315 1316 for (chp = 0; chp < 8; chp++) 1317 if (pm & (0x80 >> chp)) 1318 dasd_path_preferred(device, chp); 1319 } 1320 1321 static inline void dasd_path_add_fcsecpm(struct dasd_device *device, __u8 pm) 1322 { 1323 int chp; 1324 1325 for (chp = 0; chp < 8; chp++) 1326 if (pm & (0x80 >> chp)) 1327 dasd_path_fcsec(device, chp); 1328 } 1329 1330 /* 1331 * set functions for path masks 1332 * the existing path mask will be replaced by the given path mask 1333 */ 1334 static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm) 1335 { 1336 int chp; 1337 1338 for (chp = 0; chp < 8; chp++) 1339 if (pm & (0x80 >> chp)) 1340 dasd_path_verify(device, chp); 1341 else 1342 dasd_path_clear_verify(device, chp); 1343 } 1344 1345 static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm) 1346 { 1347 int chp; 1348 1349 for (chp = 0; chp < 8; chp++) { 1350 dasd_path_clear_oper(device, chp); 1351 if (pm & (0x80 >> chp)) { 1352 dasd_path_operational(device, chp); 1353 /* 1354 * if the path is used 1355 * it should not be in one of the negative lists 1356 */ 1357 dasd_path_clear_nohpf(device, chp); 1358 dasd_path_clear_cuir(device, chp); 1359 dasd_path_clear_cable(device, chp); 1360 dasd_path_clear_ifcc(device, chp); 1361 } 1362 } 1363 } 1364 1365 /* 1366 * remove functions for path masks 1367 * the existing path mask will be cleared with the given path mask 1368 */ 1369 static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm) 1370 { 1371 int chp; 1372 1373 for (chp = 0; chp < 8; chp++) { 1374 if (pm & (0x80 >> chp)) 1375 dasd_path_clear_oper(device, chp); 1376 } 1377 } 1378 1379 /* 1380 * add the newly available path to the to be verified pm and remove it from 1381 * normal operation until it is verified 1382 */ 1383 static inline void dasd_path_available(struct dasd_device *device, int chp) 1384 { 1385 dasd_path_clear_oper(device, chp); 1386 dasd_path_verify(device, chp); 1387 } 1388 1389 static inline void dasd_path_notoper(struct dasd_device *device, int chp) 1390 { 1391 dasd_path_clear_oper(device, chp); 1392 dasd_path_clear_preferred(device, chp); 1393 dasd_path_clear_nonpreferred(device, chp); 1394 } 1395 1396 static inline void dasd_path_fcsec_update(struct dasd_device *device, int chp) 1397 { 1398 dasd_path_fcsec(device, chp); 1399 } 1400 1401 /* 1402 * remove all paths from normal operation 1403 */ 1404 static inline void dasd_path_no_path(struct dasd_device *device) 1405 { 1406 int chp; 1407 1408 for (chp = 0; chp < 8; chp++) 1409 dasd_path_notoper(device, chp); 1410 1411 dasd_path_clear_all_verify(device); 1412 } 1413 1414 /* end - path handling */ 1415 1416 #endif /* DASD_H */ 1417