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