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_IT 5 /* Suppress 'Invalid Track' 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 #define DASD_UID_STRLEN ( /* vendor */ 3 + 1 + /* serial */ 14 + 1 + \ 263 /* SSID */ 4 + 1 + /* unit addr */ 2 + 1 + \ 264 /* vduit */ 32 + 1) 265 266 /* 267 * PPRC Status data 268 */ 269 struct dasd_pprc_header { 270 __u8 entries; /* 0 Number of device entries */ 271 __u8 unused; /* 1 unused */ 272 __u16 entry_length; /* 2-3 Length of device entry */ 273 __u32 unused2; /* 4-7 unused */ 274 } __packed; 275 276 struct dasd_pprc_dev_info { 277 __u8 state; /* 0 Copy State */ 278 __u8 flags; /* 1 Flags */ 279 __u8 reserved1[2]; /* 2-3 reserved */ 280 __u8 prim_lss; /* 4 Primary device LSS */ 281 __u8 primary; /* 5 Primary device address */ 282 __u8 sec_lss; /* 6 Secondary device LSS */ 283 __u8 secondary; /* 7 Secondary device address */ 284 __u16 pprc_id; /* 8-9 Peer-to-Peer Remote Copy ID */ 285 __u8 reserved2[12]; /* 10-21 reserved */ 286 __u16 prim_cu_ssid; /* 22-23 Pimary Control Unit SSID */ 287 __u8 reserved3[12]; /* 24-35 reserved */ 288 __u16 sec_cu_ssid; /* 36-37 Secondary Control Unit SSID */ 289 __u8 reserved4[90]; /* 38-127 reserved */ 290 } __packed; 291 292 struct dasd_pprc_data_sc4 { 293 struct dasd_pprc_header header; 294 struct dasd_pprc_dev_info dev_info[5]; 295 } __packed; 296 297 #define DASD_BUS_ID_SIZE 20 298 #define DASD_CP_ENTRIES 5 299 300 struct dasd_copy_entry { 301 char busid[DASD_BUS_ID_SIZE]; 302 struct dasd_device *device; 303 bool primary; 304 bool configured; 305 }; 306 307 struct dasd_copy_relation { 308 struct dasd_copy_entry entry[DASD_CP_ENTRIES]; 309 struct dasd_copy_entry *active; 310 }; 311 312 int dasd_devmap_set_device_copy_relation(struct ccw_device *, 313 bool pprc_enabled); 314 315 /* 316 * the struct dasd_discipline is 317 * sth like a table of virtual functions, if you think of dasd_eckd 318 * inheriting dasd... 319 * no, currently we are not planning to reimplement the driver in C++ 320 */ 321 struct dasd_discipline { 322 struct module *owner; 323 char ebcname[8]; /* a name used for tagging and printks */ 324 char name[8]; /* a name used for tagging and printks */ 325 326 struct list_head list; /* used for list of disciplines */ 327 328 /* 329 * Device recognition functions. check_device is used to verify 330 * the sense data and the information returned by read device 331 * characteristics. It returns 0 if the discipline can be used 332 * for the device in question. uncheck_device is called during 333 * device shutdown to deregister a device from its discipline. 334 */ 335 int (*check_device) (struct dasd_device *); 336 void (*uncheck_device) (struct dasd_device *); 337 338 /* 339 * do_analysis is used in the step from device state "basic" to 340 * state "accept". It returns 0 if the device can be made ready, 341 * it returns -EMEDIUMTYPE if the device can't be made ready or 342 * -EAGAIN if do_analysis started a ccw that needs to complete 343 * before the analysis may be repeated. 344 */ 345 int (*do_analysis) (struct dasd_block *); 346 347 /* 348 * This function is called, when new paths become available. 349 * Disciplins may use this callback to do necessary setup work, 350 * e.g. verify that new path is compatible with the current 351 * configuration. 352 */ 353 int (*pe_handler)(struct dasd_device *, __u8, __u8); 354 355 /* 356 * Last things to do when a device is set online, and first things 357 * when it is set offline. 358 */ 359 int (*basic_to_ready) (struct dasd_device *); 360 int (*online_to_ready) (struct dasd_device *); 361 int (*basic_to_known)(struct dasd_device *); 362 363 /* 364 * Initialize block layer request queue. 365 */ 366 void (*setup_blk_queue)(struct dasd_block *); 367 /* (struct dasd_device *); 368 * Device operation functions. build_cp creates a ccw chain for 369 * a block device request, start_io starts the request and 370 * term_IO cancels it (e.g. in case of a timeout). format_device 371 * formats the device and check_device_format compares the format of 372 * a device with the expected format_data. 373 * handle_terminated_request allows to examine a cqr and prepare 374 * it for retry. 375 */ 376 struct dasd_ccw_req *(*build_cp) (struct dasd_device *, 377 struct dasd_block *, 378 struct request *); 379 int (*start_IO) (struct dasd_ccw_req *); 380 int (*term_IO) (struct dasd_ccw_req *); 381 void (*handle_terminated_request) (struct dasd_ccw_req *); 382 int (*format_device) (struct dasd_device *, 383 struct format_data_t *, int); 384 int (*check_device_format)(struct dasd_device *, 385 struct format_check_t *, int); 386 int (*free_cp) (struct dasd_ccw_req *, struct request *); 387 388 /* 389 * Error recovery functions. examine_error() returns a value that 390 * indicates what to do for an error condition. If examine_error() 391 * returns 'dasd_era_recover' erp_action() is called to create a 392 * special error recovery ccw. erp_postaction() is called after 393 * an error recovery ccw has finished its execution. dump_sense 394 * is called for every error condition to print the sense data 395 * to the console. 396 */ 397 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); 398 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); 399 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, 400 struct irb *); 401 void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *); 402 void (*check_for_device_change) (struct dasd_device *, 403 struct dasd_ccw_req *, 404 struct irb *); 405 406 /* i/o control functions. */ 407 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *); 408 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); 409 int (*ioctl) (struct dasd_block *, unsigned int, void __user *); 410 411 /* reload device after state change */ 412 int (*reload) (struct dasd_device *); 413 414 int (*get_uid) (struct dasd_device *, struct dasd_uid *); 415 void (*kick_validate) (struct dasd_device *); 416 int (*check_attention)(struct dasd_device *, __u8); 417 int (*host_access_count)(struct dasd_device *); 418 int (*hosts_print)(struct dasd_device *, struct seq_file *); 419 void (*handle_hpf_error)(struct dasd_device *, struct irb *); 420 void (*disable_hpf)(struct dasd_device *); 421 int (*hpf_enabled)(struct dasd_device *); 422 void (*reset_path)(struct dasd_device *, __u8); 423 424 /* 425 * Extent Space Efficient (ESE) relevant functions 426 */ 427 int (*is_ese)(struct dasd_device *); 428 /* Capacity */ 429 int (*space_allocated)(struct dasd_device *); 430 int (*space_configured)(struct dasd_device *); 431 int (*logical_capacity)(struct dasd_device *); 432 int (*release_space)(struct dasd_device *, struct format_data_t *); 433 /* Extent Pool */ 434 int (*ext_pool_id)(struct dasd_device *); 435 int (*ext_size)(struct dasd_device *); 436 int (*ext_pool_cap_at_warnlevel)(struct dasd_device *); 437 int (*ext_pool_warn_thrshld)(struct dasd_device *); 438 int (*ext_pool_oos)(struct dasd_device *); 439 int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *); 440 struct dasd_ccw_req *(*ese_format)(struct dasd_device *, 441 struct dasd_ccw_req *, struct irb *); 442 int (*ese_read)(struct dasd_ccw_req *, struct irb *); 443 int (*pprc_status)(struct dasd_device *, struct dasd_pprc_data_sc4 *); 444 bool (*pprc_enabled)(struct dasd_device *); 445 int (*copy_pair_swap)(struct dasd_device *, char *, char *); 446 int (*device_ping)(struct dasd_device *); 447 }; 448 449 extern struct dasd_discipline *dasd_diag_discipline_pointer; 450 451 /* Trigger IDs for extended error reporting DASD EER and autoquiesce */ 452 enum eer_trigger { 453 DASD_EER_FATALERROR = 1, 454 DASD_EER_NOPATH, 455 DASD_EER_STATECHANGE, 456 DASD_EER_PPRCSUSPEND, 457 DASD_EER_NOSPC, 458 DASD_EER_TIMEOUTS, 459 DASD_EER_STARTIO, 460 461 /* enum end marker, only add new trigger above */ 462 DASD_EER_MAX, 463 DASD_EER_AUTOQUIESCE = 31, /* internal only */ 464 }; 465 466 #define DASD_EER_VALID ((1U << DASD_EER_MAX) - 1) 467 468 /* DASD path handling */ 469 470 #define DASD_PATH_OPERATIONAL 1 471 #define DASD_PATH_TBV 2 472 #define DASD_PATH_PP 3 473 #define DASD_PATH_NPP 4 474 #define DASD_PATH_MISCABLED 5 475 #define DASD_PATH_NOHPF 6 476 #define DASD_PATH_CUIR 7 477 #define DASD_PATH_IFCC 8 478 #define DASD_PATH_FCSEC 9 479 480 #define DASD_THRHLD_MAX 4294967295U 481 #define DASD_INTERVAL_MAX 4294967295U 482 483 /* FC Endpoint Security Capabilities */ 484 #define DASD_FC_SECURITY_UNSUP 0 485 #define DASD_FC_SECURITY_AUTH 1 486 #define DASD_FC_SECURITY_ENC_FCSP2 2 487 #define DASD_FC_SECURITY_ENC_ERAS 3 488 489 #define DASD_FC_SECURITY_ENC_STR "Encryption" 490 static const struct { 491 u8 value; 492 char *name; 493 } dasd_path_fcs_mnemonics[] = { 494 { DASD_FC_SECURITY_UNSUP, "Unsupported" }, 495 { DASD_FC_SECURITY_AUTH, "Authentication" }, 496 { DASD_FC_SECURITY_ENC_FCSP2, DASD_FC_SECURITY_ENC_STR }, 497 { DASD_FC_SECURITY_ENC_ERAS, DASD_FC_SECURITY_ENC_STR }, 498 }; 499 dasd_path_get_fcs_str(int val)500 static inline char *dasd_path_get_fcs_str(int val) 501 { 502 int i; 503 504 for (i = 0; i < ARRAY_SIZE(dasd_path_fcs_mnemonics); i++) { 505 if (dasd_path_fcs_mnemonics[i].value == val) 506 return dasd_path_fcs_mnemonics[i].name; 507 } 508 509 return dasd_path_fcs_mnemonics[0].name; 510 } 511 512 struct dasd_path { 513 unsigned long flags; 514 u8 cssid; 515 u8 ssid; 516 u8 chpid; 517 struct dasd_conf_data *conf_data; 518 atomic_t error_count; 519 unsigned long errorclk; 520 u8 fc_security; 521 struct kobject kobj; 522 bool in_sysfs; 523 }; 524 525 #define to_dasd_path(path) container_of(path, struct dasd_path, kobj) 526 dasd_path_release(struct kobject * kobj)527 static inline void dasd_path_release(struct kobject *kobj) 528 { 529 /* Memory for the dasd_path kobject is freed when dasd_free_device() is called */ 530 } 531 532 533 struct dasd_profile_info { 534 /* legacy part of profile data, as in dasd_profile_info_t */ 535 unsigned int dasd_io_reqs; /* number of requests processed */ 536 unsigned int dasd_io_sects; /* number of sectors processed */ 537 unsigned int dasd_io_secs[32]; /* histogram of request's sizes */ 538 unsigned int dasd_io_times[32]; /* histogram of requests's times */ 539 unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */ 540 unsigned int dasd_io_time1[32]; /* hist. of time from build to start */ 541 unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */ 542 unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */ 543 unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */ 544 unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */ 545 546 /* new data */ 547 struct timespec64 starttod; /* time of start or last reset */ 548 unsigned int dasd_io_alias; /* requests using an alias */ 549 unsigned int dasd_io_tpm; /* requests using transport mode */ 550 unsigned int dasd_read_reqs; /* total number of read requests */ 551 unsigned int dasd_read_sects; /* total number read sectors */ 552 unsigned int dasd_read_alias; /* read request using an alias */ 553 unsigned int dasd_read_tpm; /* read requests in transport mode */ 554 unsigned int dasd_read_secs[32]; /* histogram of request's sizes */ 555 unsigned int dasd_read_times[32]; /* histogram of requests's times */ 556 unsigned int dasd_read_time1[32]; /* hist. time from build to start */ 557 unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */ 558 unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */ 559 unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */ 560 unsigned long dasd_sum_times; /* sum of request times */ 561 unsigned long dasd_sum_time_str; /* sum of time from build to start */ 562 unsigned long dasd_sum_time_irq; /* sum of time from start to irq */ 563 unsigned long dasd_sum_time_end; /* sum of time from irq to end */ 564 }; 565 566 struct dasd_profile { 567 struct dentry *dentry; 568 struct dasd_profile_info *data; 569 spinlock_t lock; 570 }; 571 572 struct dasd_format_entry { 573 struct list_head list; 574 sector_t track; 575 }; 576 577 struct dasd_device { 578 /* Block device stuff. */ 579 struct dasd_block *block; 580 581 unsigned int devindex; 582 unsigned long flags; /* per device flags */ 583 unsigned short features; /* copy of devmap-features (read-only!) */ 584 585 /* extended error reporting stuff (eer) */ 586 struct dasd_ccw_req *eer_cqr; 587 588 /* Device discipline stuff. */ 589 struct dasd_discipline *discipline; 590 struct dasd_discipline *base_discipline; 591 void *private; 592 struct dasd_path path[8]; 593 __u8 opm; 594 595 /* Device state and target state. */ 596 int state, target; 597 struct mutex state_mutex; 598 int stopped; /* device (ccw_device_start) was stopped */ 599 600 /* reference count. */ 601 atomic_t ref_count; 602 603 /* ccw queue and memory for static ccw/erp buffers. */ 604 struct list_head ccw_queue; 605 spinlock_t mem_lock; 606 void *ccw_mem; 607 void *erp_mem; 608 void *ese_mem; 609 struct list_head ccw_chunks; 610 struct list_head erp_chunks; 611 struct list_head ese_chunks; 612 613 atomic_t tasklet_scheduled; 614 struct tasklet_struct tasklet; 615 struct work_struct kick_work; 616 struct work_struct reload_device; 617 struct work_struct kick_validate; 618 struct work_struct suc_work; 619 struct work_struct requeue_requests; 620 struct timer_list timer; 621 622 debug_info_t *debug_area; 623 624 struct ccw_device *cdev; 625 626 /* hook for alias management */ 627 struct list_head alias_list; 628 629 /* default expiration time in s */ 630 unsigned long default_expires; 631 unsigned long default_retries; 632 633 unsigned long blk_timeout; 634 635 unsigned long path_thrhld; 636 unsigned long path_interval; 637 638 struct dentry *debugfs_dentry; 639 struct dentry *hosts_dentry; 640 struct dasd_profile profile; 641 struct dasd_format_entry format_entry; 642 struct kset *paths_info; 643 struct dasd_copy_relation *copy; 644 unsigned long aq_mask; 645 unsigned int aq_timeouts; 646 }; 647 648 struct dasd_block { 649 /* Block device stuff. */ 650 struct gendisk *gdp; 651 spinlock_t request_queue_lock; 652 struct blk_mq_tag_set tag_set; 653 struct block_device *bdev; 654 atomic_t open_count; 655 656 unsigned long blocks; /* size of volume in blocks */ 657 unsigned int bp_block; /* bytes per block */ 658 unsigned int s2b_shift; /* log2 (bp_block/512) */ 659 660 struct dasd_device *base; 661 struct list_head ccw_queue; 662 spinlock_t queue_lock; 663 664 atomic_t tasklet_scheduled; 665 struct tasklet_struct tasklet; 666 struct timer_list timer; 667 668 struct dentry *debugfs_dentry; 669 struct dasd_profile profile; 670 671 struct list_head format_list; 672 spinlock_t format_lock; 673 atomic_t trkcount; 674 }; 675 676 struct dasd_attention_data { 677 struct dasd_device *device; 678 __u8 lpum; 679 }; 680 681 struct dasd_queue { 682 spinlock_t lock; 683 }; 684 685 /* reasons why device (ccw_device_start) was stopped */ 686 #define DASD_STOPPED_NOT_ACC 1 /* not accessible */ 687 #define DASD_STOPPED_QUIESCE 2 /* Quiesced */ 688 #define DASD_STOPPED_PENDING 4 /* long busy */ 689 #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ 690 #define DASD_STOPPED_SU 16 /* summary unit check handling */ 691 #define DASD_STOPPED_PPRC 32 /* PPRC swap */ 692 #define DASD_STOPPED_NOSPC 128 /* no space left */ 693 694 /* per device flags */ 695 #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ 696 #define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ 697 #define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ 698 #define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't 699 * confuse this with the user specified 700 * read-only feature. 701 */ 702 #define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */ 703 #define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */ 704 #define DASD_FLAG_SUSPENDED 9 /* The device was suspended */ 705 #define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/ 706 #define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */ 707 #define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */ 708 #define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */ 709 #define DASD_FLAG_SUC 14 /* unhandled summary unit check */ 710 711 #define DASD_SLEEPON_START_TAG ((void *) 1) 712 #define DASD_SLEEPON_END_TAG ((void *) 2) 713 714 void dasd_put_device_wake(struct dasd_device *); 715 716 /* 717 * return values to be returned from the copy pair swap function 718 * 0x00: swap successful 719 * 0x01: swap data invalid 720 * 0x02: no active device found 721 * 0x03: wrong primary specified 722 * 0x04: secondary device not found 723 * 0x05: swap already running 724 */ 725 #define DASD_COPYPAIRSWAP_SUCCESS 0 726 #define DASD_COPYPAIRSWAP_INVALID 1 727 #define DASD_COPYPAIRSWAP_NOACTIVE 2 728 #define DASD_COPYPAIRSWAP_PRIMARY 3 729 #define DASD_COPYPAIRSWAP_SECONDARY 4 730 #define DASD_COPYPAIRSWAP_MULTIPLE 5 731 732 /* 733 * Reference count inliners 734 */ 735 static inline void dasd_get_device(struct dasd_device * device)736 dasd_get_device(struct dasd_device *device) 737 { 738 atomic_inc(&device->ref_count); 739 } 740 741 static inline void dasd_put_device(struct dasd_device * device)742 dasd_put_device(struct dasd_device *device) 743 { 744 if (atomic_dec_return(&device->ref_count) == 0) 745 dasd_put_device_wake(device); 746 } 747 748 /* 749 * The static memory in ccw_mem and erp_mem is managed by a sorted 750 * list of free memory chunks. 751 */ 752 struct dasd_mchunk 753 { 754 struct list_head list; 755 unsigned long size; 756 } __attribute__ ((aligned(8))); 757 758 static inline void dasd_init_chunklist(struct list_head * chunk_list,void * mem,unsigned long size)759 dasd_init_chunklist(struct list_head *chunk_list, void *mem, 760 unsigned long size) 761 { 762 struct dasd_mchunk *chunk; 763 764 INIT_LIST_HEAD(chunk_list); 765 chunk = (struct dasd_mchunk *) mem; 766 chunk->size = size - sizeof(struct dasd_mchunk); 767 list_add(&chunk->list, chunk_list); 768 } 769 770 static inline void * dasd_alloc_chunk(struct list_head * chunk_list,unsigned long size)771 dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size) 772 { 773 struct dasd_mchunk *chunk, *tmp; 774 775 size = (size + 7L) & -8L; 776 list_for_each_entry(chunk, chunk_list, list) { 777 if (chunk->size < size) 778 continue; 779 if (chunk->size > size + sizeof(struct dasd_mchunk)) { 780 char *endaddr = (char *) (chunk + 1) + chunk->size; 781 tmp = (struct dasd_mchunk *) (endaddr - size) - 1; 782 tmp->size = size; 783 chunk->size -= size + sizeof(struct dasd_mchunk); 784 chunk = tmp; 785 } else 786 list_del(&chunk->list); 787 return (void *) (chunk + 1); 788 } 789 return NULL; 790 } 791 792 static inline void dasd_free_chunk(struct list_head * chunk_list,void * mem)793 dasd_free_chunk(struct list_head *chunk_list, void *mem) 794 { 795 struct dasd_mchunk *chunk, *tmp; 796 struct list_head *p, *left; 797 798 chunk = (struct dasd_mchunk *) 799 ((char *) mem - sizeof(struct dasd_mchunk)); 800 /* Find out the left neighbour in chunk_list. */ 801 left = chunk_list; 802 list_for_each(p, chunk_list) { 803 if (list_entry(p, struct dasd_mchunk, list) > chunk) 804 break; 805 left = p; 806 } 807 /* Try to merge with right neighbour = next element from left. */ 808 if (left->next != chunk_list) { 809 tmp = list_entry(left->next, struct dasd_mchunk, list); 810 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) { 811 list_del(&tmp->list); 812 chunk->size += tmp->size + sizeof(struct dasd_mchunk); 813 } 814 } 815 /* Try to merge with left neighbour. */ 816 if (left != chunk_list) { 817 tmp = list_entry(left, struct dasd_mchunk, list); 818 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) { 819 tmp->size += chunk->size + sizeof(struct dasd_mchunk); 820 return; 821 } 822 } 823 __list_add(&chunk->list, left, left->next); 824 } 825 826 /* 827 * Check if bsize is in { 512, 1024, 2048, 4096 } 828 */ 829 static inline int dasd_check_blocksize(int bsize)830 dasd_check_blocksize(int bsize) 831 { 832 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize)) 833 return -EMEDIUMTYPE; 834 return 0; 835 } 836 837 /* 838 * return the callback data of the original request in case there are 839 * ERP requests build on top of it 840 */ dasd_get_callback_data(struct dasd_ccw_req * cqr)841 static inline void *dasd_get_callback_data(struct dasd_ccw_req *cqr) 842 { 843 while (cqr->refers) 844 cqr = cqr->refers; 845 846 return cqr->callback_data; 847 } 848 849 /* externals in dasd.c */ 850 #define DASD_PROFILE_OFF 0 851 #define DASD_PROFILE_ON 1 852 #define DASD_PROFILE_GLOBAL_ONLY 2 853 854 extern debug_info_t *dasd_debug_area; 855 extern struct dasd_profile dasd_global_profile; 856 extern unsigned int dasd_global_profile_level; 857 extern const struct block_device_operations dasd_device_operations; 858 extern struct blk_mq_ops dasd_mq_ops; 859 860 extern struct kmem_cache *dasd_page_cache; 861 862 struct dasd_ccw_req * 863 dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *); 864 struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *); 865 void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); 866 void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *); 867 void dasd_wakeup_cb(struct dasd_ccw_req *, void *); 868 869 struct dasd_device *dasd_alloc_device(void); 870 void dasd_free_device(struct dasd_device *); 871 872 struct dasd_block *dasd_alloc_block(void); 873 void dasd_free_block(struct dasd_block *); 874 875 enum blk_eh_timer_return dasd_times_out(struct request *req); 876 877 void dasd_enable_device(struct dasd_device *); 878 void dasd_set_target_state(struct dasd_device *, int); 879 void dasd_kick_device(struct dasd_device *); 880 void dasd_reload_device(struct dasd_device *); 881 void dasd_schedule_requeue(struct dasd_device *); 882 883 void dasd_add_request_head(struct dasd_ccw_req *); 884 void dasd_add_request_tail(struct dasd_ccw_req *); 885 int dasd_start_IO(struct dasd_ccw_req *); 886 int dasd_term_IO(struct dasd_ccw_req *); 887 void dasd_schedule_device_bh(struct dasd_device *); 888 void dasd_schedule_block_bh(struct dasd_block *); 889 int dasd_sleep_on(struct dasd_ccw_req *); 890 int dasd_sleep_on_queue(struct list_head *); 891 int dasd_sleep_on_immediatly(struct dasd_ccw_req *); 892 int dasd_sleep_on_queue_interruptible(struct list_head *); 893 int dasd_sleep_on_interruptible(struct dasd_ccw_req *); 894 void dasd_device_set_timer(struct dasd_device *, int); 895 void dasd_device_clear_timer(struct dasd_device *); 896 void dasd_block_set_timer(struct dasd_block *, int); 897 void dasd_block_clear_timer(struct dasd_block *); 898 int dasd_cancel_req(struct dasd_ccw_req *); 899 int dasd_flush_device_queue(struct dasd_device *); 900 int dasd_generic_probe(struct ccw_device *); 901 void dasd_generic_free_discipline(struct dasd_device *); 902 void dasd_generic_remove (struct ccw_device *cdev); 903 int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); 904 int dasd_generic_set_offline (struct ccw_device *cdev); 905 int dasd_generic_notify(struct ccw_device *, int); 906 int dasd_generic_last_path_gone(struct dasd_device *); 907 int dasd_generic_path_operational(struct dasd_device *); 908 void dasd_generic_shutdown(struct ccw_device *); 909 910 void dasd_generic_handle_state_change(struct dasd_device *); 911 enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *); 912 void dasd_generic_path_event(struct ccw_device *, int *); 913 int dasd_generic_verify_path(struct dasd_device *, __u8); 914 void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *); 915 void dasd_generic_space_avail(struct dasd_device *); 916 917 int dasd_generic_requeue_all_requests(struct dasd_device *); 918 919 int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); 920 char *dasd_get_sense(struct irb *); 921 922 void dasd_device_set_stop_bits(struct dasd_device *, int); 923 void dasd_device_remove_stop_bits(struct dasd_device *, int); 924 925 int dasd_device_is_ro(struct dasd_device *); 926 927 void dasd_profile_reset(struct dasd_profile *); 928 int dasd_profile_on(struct dasd_profile *); 929 void dasd_profile_off(struct dasd_profile *); 930 char *dasd_get_user_string(const char __user *, size_t); 931 932 /* externals in dasd_devmap.c */ 933 extern int dasd_max_devindex; 934 extern int dasd_probeonly; 935 extern int dasd_autodetect; 936 extern int dasd_nopav; 937 extern int dasd_nofcx; 938 939 int dasd_devmap_init(void); 940 void dasd_devmap_exit(void); 941 942 struct dasd_device *dasd_create_device(struct ccw_device *); 943 void dasd_delete_device(struct dasd_device *); 944 945 int dasd_get_feature(struct ccw_device *, int); 946 int dasd_set_feature(struct ccw_device *, int, int); 947 948 extern const struct attribute_group *dasd_dev_groups[]; 949 void dasd_path_create_kobj(struct dasd_device *, int); 950 void dasd_path_create_kobjects(struct dasd_device *); 951 void dasd_path_remove_kobjects(struct dasd_device *); 952 953 struct dasd_device *dasd_device_from_cdev(struct ccw_device *); 954 struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *); 955 struct dasd_device *dasd_device_from_devindex(int); 956 957 void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *); 958 struct dasd_device *dasd_device_from_gendisk(struct gendisk *); 959 960 int dasd_parse(void) __init; 961 int dasd_busid_known(const char *); 962 963 /* externals in dasd_gendisk.c */ 964 int dasd_gendisk_init(void); 965 void dasd_gendisk_exit(void); 966 int dasd_gendisk_alloc(struct dasd_block *); 967 void dasd_gendisk_free(struct dasd_block *); 968 int dasd_scan_partitions(struct dasd_block *); 969 void dasd_destroy_partitions(struct dasd_block *); 970 971 /* externals in dasd_ioctl.c */ 972 int dasd_ioctl(struct block_device *bdev, blk_mode_t mode, unsigned int cmd, 973 unsigned long arg); 974 int dasd_set_read_only(struct block_device *bdev, bool ro); 975 976 /* externals in dasd_proc.c */ 977 int dasd_proc_init(void); 978 void dasd_proc_exit(void); 979 980 /* externals in dasd_erp.c */ 981 struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); 982 struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); 983 struct dasd_ccw_req *dasd_alloc_erp_request(unsigned int, int, int, 984 struct dasd_device *); 985 void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); 986 void dasd_log_sense(struct dasd_ccw_req *, struct irb *); 987 void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb); 988 989 /* externals in dasd_3990_erp.c */ 990 struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); 991 void dasd_3990_erp_handle_sim(struct dasd_device *, char *); 992 993 /* externals in dasd_eer.c */ 994 #ifdef CONFIG_DASD_EER 995 int dasd_eer_init(void); 996 void dasd_eer_exit(void); 997 int dasd_eer_enable(struct dasd_device *); 998 void dasd_eer_disable(struct dasd_device *); 999 void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, 1000 unsigned int id); 1001 void dasd_eer_snss(struct dasd_device *); 1002 dasd_eer_enabled(struct dasd_device * device)1003 static inline int dasd_eer_enabled(struct dasd_device *device) 1004 { 1005 return device->eer_cqr != NULL; 1006 } 1007 #else 1008 #define dasd_eer_init() (0) 1009 #define dasd_eer_exit() do { } while (0) 1010 #define dasd_eer_enable(d) (0) 1011 #define dasd_eer_disable(d) do { } while (0) 1012 #define dasd_eer_write(d,c,i) do { } while (0) 1013 #define dasd_eer_snss(d) do { } while (0) 1014 #define dasd_eer_enabled(d) (0) 1015 #endif /* CONFIG_DASD_ERR */ 1016 1017 1018 /* DASD path handling functions */ 1019 1020 /* 1021 * helper functions to modify bit masks for a given channel path for a device 1022 */ dasd_path_is_operational(struct dasd_device * device,int chp)1023 static inline int dasd_path_is_operational(struct dasd_device *device, int chp) 1024 { 1025 return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 1026 } 1027 dasd_path_need_verify(struct dasd_device * device,int chp)1028 static inline int dasd_path_need_verify(struct dasd_device *device, int chp) 1029 { 1030 return test_bit(DASD_PATH_TBV, &device->path[chp].flags); 1031 } 1032 dasd_path_verify(struct dasd_device * device,int chp)1033 static inline void dasd_path_verify(struct dasd_device *device, int chp) 1034 { 1035 __set_bit(DASD_PATH_TBV, &device->path[chp].flags); 1036 } 1037 dasd_path_clear_verify(struct dasd_device * device,int chp)1038 static inline void dasd_path_clear_verify(struct dasd_device *device, int chp) 1039 { 1040 __clear_bit(DASD_PATH_TBV, &device->path[chp].flags); 1041 } 1042 dasd_path_clear_all_verify(struct dasd_device * device)1043 static inline void dasd_path_clear_all_verify(struct dasd_device *device) 1044 { 1045 int chp; 1046 1047 for (chp = 0; chp < 8; chp++) 1048 dasd_path_clear_verify(device, chp); 1049 } 1050 dasd_path_fcsec(struct dasd_device * device,int chp)1051 static inline void dasd_path_fcsec(struct dasd_device *device, int chp) 1052 { 1053 __set_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 1054 } 1055 dasd_path_clear_fcsec(struct dasd_device * device,int chp)1056 static inline void dasd_path_clear_fcsec(struct dasd_device *device, int chp) 1057 { 1058 __clear_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 1059 } 1060 dasd_path_need_fcsec(struct dasd_device * device,int chp)1061 static inline int dasd_path_need_fcsec(struct dasd_device *device, int chp) 1062 { 1063 return test_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 1064 } 1065 dasd_path_clear_all_fcsec(struct dasd_device * device)1066 static inline void dasd_path_clear_all_fcsec(struct dasd_device *device) 1067 { 1068 int chp; 1069 1070 for (chp = 0; chp < 8; chp++) 1071 dasd_path_clear_fcsec(device, chp); 1072 } 1073 dasd_path_operational(struct dasd_device * device,int chp)1074 static inline void dasd_path_operational(struct dasd_device *device, int chp) 1075 { 1076 __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 1077 device->opm |= (0x80 >> chp); 1078 } 1079 dasd_path_nonpreferred(struct dasd_device * device,int chp)1080 static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp) 1081 { 1082 __set_bit(DASD_PATH_NPP, &device->path[chp].flags); 1083 } 1084 dasd_path_is_nonpreferred(struct dasd_device * device,int chp)1085 static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp) 1086 { 1087 return test_bit(DASD_PATH_NPP, &device->path[chp].flags); 1088 } 1089 dasd_path_clear_nonpreferred(struct dasd_device * device,int chp)1090 static inline void dasd_path_clear_nonpreferred(struct dasd_device *device, 1091 int chp) 1092 { 1093 __clear_bit(DASD_PATH_NPP, &device->path[chp].flags); 1094 } 1095 dasd_path_preferred(struct dasd_device * device,int chp)1096 static inline void dasd_path_preferred(struct dasd_device *device, int chp) 1097 { 1098 __set_bit(DASD_PATH_PP, &device->path[chp].flags); 1099 } 1100 dasd_path_is_preferred(struct dasd_device * device,int chp)1101 static inline int dasd_path_is_preferred(struct dasd_device *device, int chp) 1102 { 1103 return test_bit(DASD_PATH_PP, &device->path[chp].flags); 1104 } 1105 dasd_path_clear_preferred(struct dasd_device * device,int chp)1106 static inline void dasd_path_clear_preferred(struct dasd_device *device, 1107 int chp) 1108 { 1109 __clear_bit(DASD_PATH_PP, &device->path[chp].flags); 1110 } 1111 dasd_path_clear_oper(struct dasd_device * device,int chp)1112 static inline void dasd_path_clear_oper(struct dasd_device *device, int chp) 1113 { 1114 __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 1115 device->opm &= ~(0x80 >> chp); 1116 } 1117 dasd_path_clear_cable(struct dasd_device * device,int chp)1118 static inline void dasd_path_clear_cable(struct dasd_device *device, int chp) 1119 { 1120 __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1121 } 1122 dasd_path_cuir(struct dasd_device * device,int chp)1123 static inline void dasd_path_cuir(struct dasd_device *device, int chp) 1124 { 1125 __set_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1126 } 1127 dasd_path_is_cuir(struct dasd_device * device,int chp)1128 static inline int dasd_path_is_cuir(struct dasd_device *device, int chp) 1129 { 1130 return test_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1131 } 1132 dasd_path_clear_cuir(struct dasd_device * device,int chp)1133 static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp) 1134 { 1135 __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1136 } 1137 dasd_path_ifcc(struct dasd_device * device,int chp)1138 static inline void dasd_path_ifcc(struct dasd_device *device, int chp) 1139 { 1140 set_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1141 } 1142 dasd_path_is_ifcc(struct dasd_device * device,int chp)1143 static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp) 1144 { 1145 return test_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1146 } 1147 dasd_path_clear_ifcc(struct dasd_device * device,int chp)1148 static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp) 1149 { 1150 clear_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1151 } 1152 dasd_path_clear_nohpf(struct dasd_device * device,int chp)1153 static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp) 1154 { 1155 __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1156 } 1157 dasd_path_miscabled(struct dasd_device * device,int chp)1158 static inline void dasd_path_miscabled(struct dasd_device *device, int chp) 1159 { 1160 __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1161 } 1162 dasd_path_is_miscabled(struct dasd_device * device,int chp)1163 static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp) 1164 { 1165 return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1166 } 1167 dasd_path_nohpf(struct dasd_device * device,int chp)1168 static inline void dasd_path_nohpf(struct dasd_device *device, int chp) 1169 { 1170 __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1171 } 1172 dasd_path_is_nohpf(struct dasd_device * device,int chp)1173 static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp) 1174 { 1175 return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1176 } 1177 1178 /* 1179 * get functions for path masks 1180 * will return a path masks for the given device 1181 */ 1182 dasd_path_get_opm(struct dasd_device * device)1183 static inline __u8 dasd_path_get_opm(struct dasd_device *device) 1184 { 1185 return device->opm; 1186 } 1187 dasd_path_get_tbvpm(struct dasd_device * device)1188 static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device) 1189 { 1190 int chp; 1191 __u8 tbvpm = 0x00; 1192 1193 for (chp = 0; chp < 8; chp++) 1194 if (dasd_path_need_verify(device, chp)) 1195 tbvpm |= 0x80 >> chp; 1196 return tbvpm; 1197 } 1198 dasd_path_get_fcsecpm(struct dasd_device * device)1199 static inline int dasd_path_get_fcsecpm(struct dasd_device *device) 1200 { 1201 int chp; 1202 1203 for (chp = 0; chp < 8; chp++) 1204 if (dasd_path_need_fcsec(device, chp)) 1205 return 1; 1206 1207 return 0; 1208 } 1209 dasd_path_get_nppm(struct dasd_device * device)1210 static inline __u8 dasd_path_get_nppm(struct dasd_device *device) 1211 { 1212 int chp; 1213 __u8 npm = 0x00; 1214 1215 for (chp = 0; chp < 8; chp++) { 1216 if (dasd_path_is_nonpreferred(device, chp)) 1217 npm |= 0x80 >> chp; 1218 } 1219 return npm; 1220 } 1221 dasd_path_get_ppm(struct dasd_device * device)1222 static inline __u8 dasd_path_get_ppm(struct dasd_device *device) 1223 { 1224 int chp; 1225 __u8 ppm = 0x00; 1226 1227 for (chp = 0; chp < 8; chp++) 1228 if (dasd_path_is_preferred(device, chp)) 1229 ppm |= 0x80 >> chp; 1230 return ppm; 1231 } 1232 dasd_path_get_cablepm(struct dasd_device * device)1233 static inline __u8 dasd_path_get_cablepm(struct dasd_device *device) 1234 { 1235 int chp; 1236 __u8 cablepm = 0x00; 1237 1238 for (chp = 0; chp < 8; chp++) 1239 if (dasd_path_is_miscabled(device, chp)) 1240 cablepm |= 0x80 >> chp; 1241 return cablepm; 1242 } 1243 dasd_path_get_cuirpm(struct dasd_device * device)1244 static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device) 1245 { 1246 int chp; 1247 __u8 cuirpm = 0x00; 1248 1249 for (chp = 0; chp < 8; chp++) 1250 if (dasd_path_is_cuir(device, chp)) 1251 cuirpm |= 0x80 >> chp; 1252 return cuirpm; 1253 } 1254 dasd_path_get_ifccpm(struct dasd_device * device)1255 static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device) 1256 { 1257 int chp; 1258 __u8 ifccpm = 0x00; 1259 1260 for (chp = 0; chp < 8; chp++) 1261 if (dasd_path_is_ifcc(device, chp)) 1262 ifccpm |= 0x80 >> chp; 1263 return ifccpm; 1264 } 1265 dasd_path_get_hpfpm(struct dasd_device * device)1266 static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device) 1267 { 1268 int chp; 1269 __u8 hpfpm = 0x00; 1270 1271 for (chp = 0; chp < 8; chp++) 1272 if (dasd_path_is_nohpf(device, chp)) 1273 hpfpm |= 0x80 >> chp; 1274 return hpfpm; 1275 } 1276 dasd_path_get_fcs_path(struct dasd_device * device,int chp)1277 static inline u8 dasd_path_get_fcs_path(struct dasd_device *device, int chp) 1278 { 1279 return device->path[chp].fc_security; 1280 } 1281 dasd_path_get_fcs_device(struct dasd_device * device)1282 static inline int dasd_path_get_fcs_device(struct dasd_device *device) 1283 { 1284 u8 fc_sec = 0; 1285 int chp; 1286 1287 for (chp = 0; chp < 8; chp++) { 1288 if (device->opm & (0x80 >> chp)) { 1289 fc_sec = device->path[chp].fc_security; 1290 break; 1291 } 1292 } 1293 for (; chp < 8; chp++) { 1294 if (device->opm & (0x80 >> chp)) 1295 if (device->path[chp].fc_security != fc_sec) 1296 return -EINVAL; 1297 } 1298 1299 return fc_sec; 1300 } 1301 1302 /* 1303 * add functions for path masks 1304 * the existing path mask will be extended by the given path mask 1305 */ dasd_path_add_tbvpm(struct dasd_device * device,__u8 pm)1306 static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm) 1307 { 1308 int chp; 1309 1310 for (chp = 0; chp < 8; chp++) 1311 if (pm & (0x80 >> chp)) 1312 dasd_path_verify(device, chp); 1313 } 1314 dasd_path_get_notoperpm(struct dasd_device * device)1315 static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device) 1316 { 1317 int chp; 1318 __u8 nopm = 0x00; 1319 1320 for (chp = 0; chp < 8; chp++) 1321 if (dasd_path_is_nohpf(device, chp) || 1322 dasd_path_is_ifcc(device, chp) || 1323 dasd_path_is_cuir(device, chp) || 1324 dasd_path_is_miscabled(device, chp)) 1325 nopm |= 0x80 >> chp; 1326 return nopm; 1327 } 1328 dasd_path_add_opm(struct dasd_device * device,__u8 pm)1329 static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm) 1330 { 1331 int chp; 1332 1333 for (chp = 0; chp < 8; chp++) 1334 if (pm & (0x80 >> chp)) { 1335 dasd_path_operational(device, chp); 1336 /* 1337 * if the path is used 1338 * it should not be in one of the negative lists 1339 */ 1340 dasd_path_clear_nohpf(device, chp); 1341 dasd_path_clear_cuir(device, chp); 1342 dasd_path_clear_cable(device, chp); 1343 dasd_path_clear_ifcc(device, chp); 1344 } 1345 } 1346 dasd_path_add_cablepm(struct dasd_device * device,__u8 pm)1347 static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm) 1348 { 1349 int chp; 1350 1351 for (chp = 0; chp < 8; chp++) 1352 if (pm & (0x80 >> chp)) 1353 dasd_path_miscabled(device, chp); 1354 } 1355 dasd_path_add_cuirpm(struct dasd_device * device,__u8 pm)1356 static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm) 1357 { 1358 int chp; 1359 1360 for (chp = 0; chp < 8; chp++) 1361 if (pm & (0x80 >> chp)) 1362 dasd_path_cuir(device, chp); 1363 } 1364 dasd_path_add_ifccpm(struct dasd_device * device,__u8 pm)1365 static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm) 1366 { 1367 int chp; 1368 1369 for (chp = 0; chp < 8; chp++) 1370 if (pm & (0x80 >> chp)) 1371 dasd_path_ifcc(device, chp); 1372 } 1373 dasd_path_add_nppm(struct dasd_device * device,__u8 pm)1374 static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm) 1375 { 1376 int chp; 1377 1378 for (chp = 0; chp < 8; chp++) 1379 if (pm & (0x80 >> chp)) 1380 dasd_path_nonpreferred(device, chp); 1381 } 1382 dasd_path_add_nohpfpm(struct dasd_device * device,__u8 pm)1383 static inline void dasd_path_add_nohpfpm(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_nohpf(device, chp); 1390 } 1391 dasd_path_add_ppm(struct dasd_device * device,__u8 pm)1392 static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm) 1393 { 1394 int chp; 1395 1396 for (chp = 0; chp < 8; chp++) 1397 if (pm & (0x80 >> chp)) 1398 dasd_path_preferred(device, chp); 1399 } 1400 dasd_path_add_fcsecpm(struct dasd_device * device,__u8 pm)1401 static inline void dasd_path_add_fcsecpm(struct dasd_device *device, __u8 pm) 1402 { 1403 int chp; 1404 1405 for (chp = 0; chp < 8; chp++) 1406 if (pm & (0x80 >> chp)) 1407 dasd_path_fcsec(device, chp); 1408 } 1409 1410 /* 1411 * set functions for path masks 1412 * the existing path mask will be replaced by the given path mask 1413 */ dasd_path_set_tbvpm(struct dasd_device * device,__u8 pm)1414 static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm) 1415 { 1416 int chp; 1417 1418 for (chp = 0; chp < 8; chp++) 1419 if (pm & (0x80 >> chp)) 1420 dasd_path_verify(device, chp); 1421 else 1422 dasd_path_clear_verify(device, chp); 1423 } 1424 dasd_path_set_opm(struct dasd_device * device,__u8 pm)1425 static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm) 1426 { 1427 int chp; 1428 1429 for (chp = 0; chp < 8; chp++) { 1430 dasd_path_clear_oper(device, chp); 1431 if (pm & (0x80 >> chp)) { 1432 dasd_path_operational(device, chp); 1433 /* 1434 * if the path is used 1435 * it should not be in one of the negative lists 1436 */ 1437 dasd_path_clear_nohpf(device, chp); 1438 dasd_path_clear_cuir(device, chp); 1439 dasd_path_clear_cable(device, chp); 1440 dasd_path_clear_ifcc(device, chp); 1441 } 1442 } 1443 } 1444 1445 /* 1446 * remove functions for path masks 1447 * the existing path mask will be cleared with the given path mask 1448 */ dasd_path_remove_opm(struct dasd_device * device,__u8 pm)1449 static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm) 1450 { 1451 int chp; 1452 1453 for (chp = 0; chp < 8; chp++) { 1454 if (pm & (0x80 >> chp)) 1455 dasd_path_clear_oper(device, chp); 1456 } 1457 } 1458 1459 /* 1460 * add the newly available path to the to be verified pm and remove it from 1461 * normal operation until it is verified 1462 */ dasd_path_available(struct dasd_device * device,int chp)1463 static inline void dasd_path_available(struct dasd_device *device, int chp) 1464 { 1465 dasd_path_clear_oper(device, chp); 1466 dasd_path_verify(device, chp); 1467 } 1468 dasd_path_notoper(struct dasd_device * device,int chp)1469 static inline void dasd_path_notoper(struct dasd_device *device, int chp) 1470 { 1471 dasd_path_clear_oper(device, chp); 1472 dasd_path_clear_preferred(device, chp); 1473 dasd_path_clear_nonpreferred(device, chp); 1474 } 1475 dasd_path_fcsec_update(struct dasd_device * device,int chp)1476 static inline void dasd_path_fcsec_update(struct dasd_device *device, int chp) 1477 { 1478 dasd_path_fcsec(device, chp); 1479 } 1480 1481 /* 1482 * remove all paths from normal operation 1483 */ dasd_path_no_path(struct dasd_device * device)1484 static inline void dasd_path_no_path(struct dasd_device *device) 1485 { 1486 int chp; 1487 1488 for (chp = 0; chp < 8; chp++) 1489 dasd_path_notoper(device, chp); 1490 1491 dasd_path_clear_all_verify(device); 1492 } 1493 1494 /* end - path handling */ 1495 1496 #endif /* DASD_H */ 1497