1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 4 * Horst Hummel <Horst.Hummel@de.ibm.com> 5 * Martin Schwidefsky <schwidefsky@de.ibm.com> 6 * Bugreports.to..: <Linux390@de.ibm.com> 7 * Copyright IBM Corp. 1999, 2009 8 */ 9 10 #ifndef DASD_INT_H 11 #define DASD_INT_H 12 13 /* we keep old device allocation scheme; IOW, minors are still in 0..255 */ 14 #define DASD_PER_MAJOR (1U << (MINORBITS - DASD_PARTN_BITS)) 15 #define DASD_PARTN_MASK ((1 << DASD_PARTN_BITS) - 1) 16 17 /* 18 * States a dasd device can have: 19 * new: the dasd_device structure is allocated. 20 * known: the discipline for the device is identified. 21 * basic: the device can do basic i/o. 22 * unfmt: the device could not be analyzed (format is unknown). 23 * ready: partition detection is done and the device is can do block io. 24 * online: the device accepts requests from the block device queue. 25 * 26 * Things to do for startup state transitions: 27 * new -> known: find discipline for the device and create devfs entries. 28 * known -> basic: request irq line for the device. 29 * basic -> ready: do the initial analysis, e.g. format detection, 30 * do block device setup and detect partitions. 31 * ready -> online: schedule the device tasklet. 32 * Things to do for shutdown state transitions: 33 * online -> ready: just set the new device state. 34 * ready -> basic: flush requests from the block device layer, clear 35 * partition information and reset format information. 36 * basic -> known: terminate all requests and free irq. 37 * known -> new: remove devfs entries and forget discipline. 38 */ 39 40 #define DASD_STATE_NEW 0 41 #define DASD_STATE_KNOWN 1 42 #define DASD_STATE_BASIC 2 43 #define DASD_STATE_UNFMT 3 44 #define DASD_STATE_READY 4 45 #define DASD_STATE_ONLINE 5 46 47 #include <linux/module.h> 48 #include <linux/wait.h> 49 #include <linux/blkdev.h> 50 #include <linux/hdreg.h> 51 #include <linux/interrupt.h> 52 #include <linux/log2.h> 53 #include <asm/ccwdev.h> 54 #include <linux/workqueue.h> 55 #include <asm/debug.h> 56 #include <asm/dasd.h> 57 #include <asm/idals.h> 58 #include <linux/bitops.h> 59 #include <linux/blk-mq.h> 60 61 /* DASD discipline magic */ 62 #define DASD_ECKD_MAGIC 0xC5C3D2C4 63 #define DASD_DIAG_MAGIC 0xC4C9C1C7 64 #define DASD_FBA_MAGIC 0xC6C2C140 65 66 /* 67 * SECTION: Type definitions 68 */ 69 struct dasd_device; 70 struct dasd_block; 71 72 /* BIT DEFINITIONS FOR SENSE DATA */ 73 #define DASD_SENSE_BIT_0 0x80 74 #define DASD_SENSE_BIT_1 0x40 75 #define DASD_SENSE_BIT_2 0x20 76 #define DASD_SENSE_BIT_3 0x10 77 78 /* BIT DEFINITIONS FOR SIM SENSE */ 79 #define DASD_SIM_SENSE 0x0F 80 #define DASD_SIM_MSG_TO_OP 0x03 81 #define DASD_SIM_LOG 0x0C 82 83 /* lock class for nested cdev lock */ 84 #define CDEV_NESTED_FIRST 1 85 #define CDEV_NESTED_SECOND 2 86 87 /* 88 * SECTION: MACROs for klogd and s390 debug feature (dbf) 89 */ 90 #define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \ 91 do { \ 92 debug_sprintf_event(d_device->debug_area, \ 93 d_level, \ 94 d_str "\n", \ 95 d_data); \ 96 } while(0) 97 98 #define DBF_EVENT(d_level, d_str, d_data...)\ 99 do { \ 100 debug_sprintf_event(dasd_debug_area, \ 101 d_level,\ 102 d_str "\n", \ 103 d_data); \ 104 } while(0) 105 106 #define DBF_EVENT_DEVID(d_level, d_cdev, d_str, d_data...) \ 107 do { \ 108 struct ccw_dev_id __dev_id; \ 109 ccw_device_get_id(d_cdev, &__dev_id); \ 110 debug_sprintf_event(dasd_debug_area, \ 111 d_level, \ 112 "0.%x.%04x " d_str "\n", \ 113 __dev_id.ssid, __dev_id.devno, d_data); \ 114 } while (0) 115 116 /* limit size for an errorstring */ 117 #define ERRORLENGTH 30 118 119 /* definition of dbf debug levels */ 120 #define DBF_EMERG 0 /* system is unusable */ 121 #define DBF_ALERT 1 /* action must be taken immediately */ 122 #define DBF_CRIT 2 /* critical conditions */ 123 #define DBF_ERR 3 /* error conditions */ 124 #define DBF_WARNING 4 /* warning conditions */ 125 #define DBF_NOTICE 5 /* normal but significant condition */ 126 #define DBF_INFO 6 /* informational */ 127 #define DBF_DEBUG 6 /* debug-level messages */ 128 129 /* messages to be written via klogd and dbf */ 130 #define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\ 131 do { \ 132 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ 133 dev_name(&d_device->cdev->dev), d_args); \ 134 DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \ 135 } while(0) 136 137 #define MESSAGE(d_loglevel,d_string,d_args...)\ 138 do { \ 139 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ 140 DBF_EVENT(DBF_ALERT, d_string, d_args); \ 141 } while(0) 142 143 /* messages to be written via klogd only */ 144 #define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\ 145 do { \ 146 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ 147 dev_name(&d_device->cdev->dev), d_args); \ 148 } while(0) 149 150 #define MESSAGE_LOG(d_loglevel,d_string,d_args...)\ 151 do { \ 152 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ 153 } while(0) 154 155 /* Macro to calculate number of blocks per page */ 156 #define BLOCKS_PER_PAGE(blksize) (PAGE_SIZE / blksize) 157 158 struct dasd_ccw_req { 159 unsigned int magic; /* Eye catcher */ 160 int intrc; /* internal error, e.g. from start_IO */ 161 struct list_head devlist; /* for dasd_device request queue */ 162 struct list_head blocklist; /* for dasd_block request queue */ 163 struct dasd_block *block; /* the originating block device */ 164 struct dasd_device *memdev; /* the device used to allocate this */ 165 struct dasd_device *startdev; /* device the request is started on */ 166 struct dasd_device *basedev; /* base device if no block->base */ 167 void *cpaddr; /* address of ccw or tcw */ 168 short retries; /* A retry counter */ 169 unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */ 170 char status; /* status of this request */ 171 char lpm; /* logical path mask */ 172 unsigned long flags; /* flags of this request */ 173 struct dasd_queue *dq; 174 unsigned long starttime; /* jiffies time of request start */ 175 unsigned long expires; /* expiration period in jiffies */ 176 void *data; /* pointer to data area */ 177 struct irb irb; /* device status in case of an error */ 178 struct dasd_ccw_req *refers; /* ERP-chain queueing. */ 179 void *function; /* originating ERP action */ 180 void *mem_chunk; 181 182 unsigned long buildclk; /* TOD-clock of request generation */ 183 unsigned long startclk; /* TOD-clock of request start */ 184 unsigned long stopclk; /* TOD-clock of request interrupt */ 185 unsigned long endclk; /* TOD-clock of request termination */ 186 187 void (*callback)(struct dasd_ccw_req *, void *data); 188 void *callback_data; 189 unsigned int proc_bytes; /* bytes for partial completion */ 190 unsigned int trkcount; /* count formatted tracks */ 191 }; 192 193 /* 194 * dasd_ccw_req -> status can be: 195 */ 196 #define DASD_CQR_FILLED 0x00 /* request is ready to be processed */ 197 #define DASD_CQR_DONE 0x01 /* request is completed successfully */ 198 #define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */ 199 #define DASD_CQR_IN_ERP 0x03 /* request is in recovery */ 200 #define DASD_CQR_FAILED 0x04 /* request is finally failed */ 201 #define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */ 202 203 #define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */ 204 #define DASD_CQR_IN_IO 0x81 /* request is currently in IO */ 205 #define DASD_CQR_ERROR 0x82 /* request is completed with error */ 206 #define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */ 207 #define DASD_CQR_CLEARED 0x84 /* request was cleared */ 208 #define DASD_CQR_SUCCESS 0x85 /* request was successful */ 209 210 /* default expiration time*/ 211 #define DASD_EXPIRES 300 212 #define DASD_EXPIRES_MAX 40000000 213 #define DASD_RETRIES 256 214 #define DASD_RETRIES_MAX 32768 215 216 /* per dasd_ccw_req flags */ 217 #define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */ 218 #define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */ 219 #define DASD_CQR_VERIFY_PATH 2 /* path verification request */ 220 #define DASD_CQR_ALLOW_SLOCK 3 /* Try this request even when lock was 221 * stolen. Should not be combined with 222 * DASD_CQR_FLAGS_USE_ERP 223 */ 224 /* 225 * The following flags are used to suppress output of certain errors. 226 */ 227 #define DASD_CQR_SUPPRESS_NRF 4 /* Suppress 'No Record Found' error */ 228 #define DASD_CQR_SUPPRESS_FP 5 /* Suppress 'File Protected' error*/ 229 #define DASD_CQR_SUPPRESS_IL 6 /* Suppress 'Incorrect Length' error */ 230 #define DASD_CQR_SUPPRESS_CR 7 /* Suppress 'Command Reject' error */ 231 232 #define DASD_REQ_PER_DEV 4 233 234 /* Signature for error recovery functions. */ 235 typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *); 236 237 /* 238 * A single CQR can only contain a maximum of 255 CCWs. It is limited by 239 * the locate record and locate record extended count value which can only hold 240 * 1 Byte max. 241 */ 242 #define DASD_CQR_MAX_CCW 255 243 244 /* 245 * Unique identifier for dasd device. 246 */ 247 #define UA_NOT_CONFIGURED 0x00 248 #define UA_BASE_DEVICE 0x01 249 #define UA_BASE_PAV_ALIAS 0x02 250 #define UA_HYPER_PAV_ALIAS 0x03 251 252 struct dasd_uid { 253 __u8 type; 254 char vendor[4]; 255 char serial[15]; 256 __u16 ssid; 257 __u8 real_unit_addr; 258 __u8 base_unit_addr; 259 char vduit[33]; 260 }; 261 262 /* 263 * PPRC Status data 264 */ 265 struct dasd_pprc_header { 266 __u8 entries; /* 0 Number of device entries */ 267 __u8 unused; /* 1 unused */ 268 __u16 entry_length; /* 2-3 Length of device entry */ 269 __u32 unused2; /* 4-7 unused */ 270 } __packed; 271 272 struct dasd_pprc_dev_info { 273 __u8 state; /* 0 Copy State */ 274 __u8 flags; /* 1 Flags */ 275 __u8 reserved1[2]; /* 2-3 reserved */ 276 __u8 prim_lss; /* 4 Primary device LSS */ 277 __u8 primary; /* 5 Primary device address */ 278 __u8 sec_lss; /* 6 Secondary device LSS */ 279 __u8 secondary; /* 7 Secondary device address */ 280 __u16 pprc_id; /* 8-9 Peer-to-Peer Remote Copy ID */ 281 __u8 reserved2[12]; /* 10-21 reserved */ 282 __u16 prim_cu_ssid; /* 22-23 Pimary Control Unit SSID */ 283 __u8 reserved3[12]; /* 24-35 reserved */ 284 __u16 sec_cu_ssid; /* 36-37 Secondary Control Unit SSID */ 285 __u8 reserved4[90]; /* 38-127 reserved */ 286 } __packed; 287 288 struct dasd_pprc_data_sc4 { 289 struct dasd_pprc_header header; 290 struct dasd_pprc_dev_info dev_info[5]; 291 } __packed; 292 293 #define DASD_BUS_ID_SIZE 20 294 #define DASD_CP_ENTRIES 5 295 296 struct dasd_copy_entry { 297 char busid[DASD_BUS_ID_SIZE]; 298 struct dasd_device *device; 299 bool primary; 300 bool configured; 301 }; 302 303 struct dasd_copy_relation { 304 struct dasd_copy_entry entry[DASD_CP_ENTRIES]; 305 struct dasd_copy_entry *active; 306 }; 307 308 int dasd_devmap_set_device_copy_relation(struct ccw_device *, 309 bool pprc_enabled); 310 311 /* 312 * the struct dasd_discipline is 313 * sth like a table of virtual functions, if you think of dasd_eckd 314 * inheriting dasd... 315 * no, currently we are not planning to reimplement the driver in C++ 316 */ 317 struct dasd_discipline { 318 struct module *owner; 319 char ebcname[8]; /* a name used for tagging and printks */ 320 char name[8]; /* a name used for tagging and printks */ 321 322 struct list_head list; /* used for list of disciplines */ 323 324 /* 325 * Device recognition functions. check_device is used to verify 326 * the sense data and the information returned by read device 327 * characteristics. It returns 0 if the discipline can be used 328 * for the device in question. uncheck_device is called during 329 * device shutdown to deregister a device from its discipline. 330 */ 331 int (*check_device) (struct dasd_device *); 332 void (*uncheck_device) (struct dasd_device *); 333 334 /* 335 * do_analysis is used in the step from device state "basic" to 336 * state "accept". It returns 0 if the device can be made ready, 337 * it returns -EMEDIUMTYPE if the device can't be made ready or 338 * -EAGAIN if do_analysis started a ccw that needs to complete 339 * before the analysis may be repeated. 340 */ 341 int (*do_analysis) (struct dasd_block *); 342 343 /* 344 * This function is called, when new paths become available. 345 * Disciplins may use this callback to do necessary setup work, 346 * e.g. verify that new path is compatible with the current 347 * configuration. 348 */ 349 int (*pe_handler)(struct dasd_device *, __u8, __u8); 350 351 /* 352 * Last things to do when a device is set online, and first things 353 * when it is set offline. 354 */ 355 int (*basic_to_ready) (struct dasd_device *); 356 int (*online_to_ready) (struct dasd_device *); 357 int (*basic_to_known)(struct dasd_device *); 358 359 /* 360 * Initialize block layer request queue. 361 */ 362 void (*setup_blk_queue)(struct dasd_block *); 363 /* (struct dasd_device *); 364 * Device operation functions. build_cp creates a ccw chain for 365 * a block device request, start_io starts the request and 366 * term_IO cancels it (e.g. in case of a timeout). format_device 367 * formats the device and check_device_format compares the format of 368 * a device with the expected format_data. 369 * handle_terminated_request allows to examine a cqr and prepare 370 * it for retry. 371 */ 372 struct dasd_ccw_req *(*build_cp) (struct dasd_device *, 373 struct dasd_block *, 374 struct request *); 375 int (*start_IO) (struct dasd_ccw_req *); 376 int (*term_IO) (struct dasd_ccw_req *); 377 void (*handle_terminated_request) (struct dasd_ccw_req *); 378 int (*format_device) (struct dasd_device *, 379 struct format_data_t *, int); 380 int (*check_device_format)(struct dasd_device *, 381 struct format_check_t *, int); 382 int (*free_cp) (struct dasd_ccw_req *, struct request *); 383 384 /* 385 * Error recovery functions. examine_error() returns a value that 386 * indicates what to do for an error condition. If examine_error() 387 * returns 'dasd_era_recover' erp_action() is called to create a 388 * special error recovery ccw. erp_postaction() is called after 389 * an error recovery ccw has finished its execution. dump_sense 390 * is called for every error condition to print the sense data 391 * to the console. 392 */ 393 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); 394 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); 395 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, 396 struct irb *); 397 void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *); 398 void (*check_for_device_change) (struct dasd_device *, 399 struct dasd_ccw_req *, 400 struct irb *); 401 402 /* i/o control functions. */ 403 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *); 404 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); 405 int (*ioctl) (struct dasd_block *, unsigned int, void __user *); 406 407 /* reload device after state change */ 408 int (*reload) (struct dasd_device *); 409 410 int (*get_uid) (struct dasd_device *, struct dasd_uid *); 411 void (*kick_validate) (struct dasd_device *); 412 int (*check_attention)(struct dasd_device *, __u8); 413 int (*host_access_count)(struct dasd_device *); 414 int (*hosts_print)(struct dasd_device *, struct seq_file *); 415 void (*handle_hpf_error)(struct dasd_device *, struct irb *); 416 void (*disable_hpf)(struct dasd_device *); 417 int (*hpf_enabled)(struct dasd_device *); 418 void (*reset_path)(struct dasd_device *, __u8); 419 420 /* 421 * Extent Space Efficient (ESE) relevant functions 422 */ 423 int (*is_ese)(struct dasd_device *); 424 /* Capacity */ 425 int (*space_allocated)(struct dasd_device *); 426 int (*space_configured)(struct dasd_device *); 427 int (*logical_capacity)(struct dasd_device *); 428 int (*release_space)(struct dasd_device *, struct format_data_t *); 429 /* Extent Pool */ 430 int (*ext_pool_id)(struct dasd_device *); 431 int (*ext_size)(struct dasd_device *); 432 int (*ext_pool_cap_at_warnlevel)(struct dasd_device *); 433 int (*ext_pool_warn_thrshld)(struct dasd_device *); 434 int (*ext_pool_oos)(struct dasd_device *); 435 int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *); 436 struct dasd_ccw_req *(*ese_format)(struct dasd_device *, 437 struct dasd_ccw_req *, struct irb *); 438 int (*ese_read)(struct dasd_ccw_req *, struct irb *); 439 int (*pprc_status)(struct dasd_device *, struct dasd_pprc_data_sc4 *); 440 bool (*pprc_enabled)(struct dasd_device *); 441 int (*copy_pair_swap)(struct dasd_device *, char *, char *); 442 int (*device_ping)(struct dasd_device *); 443 }; 444 445 extern struct dasd_discipline *dasd_diag_discipline_pointer; 446 447 /* 448 * Notification numbers for extended error reporting notifications: 449 * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's 450 * eer pointer) is freed. The error reporting module needs to do all necessary 451 * cleanup steps. 452 * The DASD_EER_TRIGGER notification sends the actual error reports (triggers). 453 */ 454 #define DASD_EER_DISABLE 0 455 #define DASD_EER_TRIGGER 1 456 457 /* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */ 458 #define DASD_EER_FATALERROR 1 459 #define DASD_EER_NOPATH 2 460 #define DASD_EER_STATECHANGE 3 461 #define DASD_EER_PPRCSUSPEND 4 462 #define DASD_EER_NOSPC 5 463 464 /* DASD path handling */ 465 466 #define DASD_PATH_OPERATIONAL 1 467 #define DASD_PATH_TBV 2 468 #define DASD_PATH_PP 3 469 #define DASD_PATH_NPP 4 470 #define DASD_PATH_MISCABLED 5 471 #define DASD_PATH_NOHPF 6 472 #define DASD_PATH_CUIR 7 473 #define DASD_PATH_IFCC 8 474 #define DASD_PATH_FCSEC 9 475 476 #define DASD_THRHLD_MAX 4294967295U 477 #define DASD_INTERVAL_MAX 4294967295U 478 479 /* FC Endpoint Security Capabilities */ 480 #define DASD_FC_SECURITY_UNSUP 0 481 #define DASD_FC_SECURITY_AUTH 1 482 #define DASD_FC_SECURITY_ENC_FCSP2 2 483 #define DASD_FC_SECURITY_ENC_ERAS 3 484 485 #define DASD_FC_SECURITY_ENC_STR "Encryption" 486 static const struct { 487 u8 value; 488 char *name; 489 } dasd_path_fcs_mnemonics[] = { 490 { DASD_FC_SECURITY_UNSUP, "Unsupported" }, 491 { DASD_FC_SECURITY_AUTH, "Authentication" }, 492 { DASD_FC_SECURITY_ENC_FCSP2, DASD_FC_SECURITY_ENC_STR }, 493 { DASD_FC_SECURITY_ENC_ERAS, DASD_FC_SECURITY_ENC_STR }, 494 }; 495 496 static inline char *dasd_path_get_fcs_str(int val) 497 { 498 int i; 499 500 for (i = 0; i < ARRAY_SIZE(dasd_path_fcs_mnemonics); i++) { 501 if (dasd_path_fcs_mnemonics[i].value == val) 502 return dasd_path_fcs_mnemonics[i].name; 503 } 504 505 return dasd_path_fcs_mnemonics[0].name; 506 } 507 508 struct dasd_path { 509 unsigned long flags; 510 u8 cssid; 511 u8 ssid; 512 u8 chpid; 513 struct dasd_conf_data *conf_data; 514 atomic_t error_count; 515 unsigned long errorclk; 516 u8 fc_security; 517 struct kobject kobj; 518 bool in_sysfs; 519 }; 520 521 #define to_dasd_path(path) container_of(path, struct dasd_path, kobj) 522 523 static inline void dasd_path_release(struct kobject *kobj) 524 { 525 /* Memory for the dasd_path kobject is freed when dasd_free_device() is called */ 526 } 527 528 529 struct dasd_profile_info { 530 /* legacy part of profile data, as in dasd_profile_info_t */ 531 unsigned int dasd_io_reqs; /* number of requests processed */ 532 unsigned int dasd_io_sects; /* number of sectors processed */ 533 unsigned int dasd_io_secs[32]; /* histogram of request's sizes */ 534 unsigned int dasd_io_times[32]; /* histogram of requests's times */ 535 unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */ 536 unsigned int dasd_io_time1[32]; /* hist. of time from build to start */ 537 unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */ 538 unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */ 539 unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */ 540 unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */ 541 542 /* new data */ 543 struct timespec64 starttod; /* time of start or last reset */ 544 unsigned int dasd_io_alias; /* requests using an alias */ 545 unsigned int dasd_io_tpm; /* requests using transport mode */ 546 unsigned int dasd_read_reqs; /* total number of read requests */ 547 unsigned int dasd_read_sects; /* total number read sectors */ 548 unsigned int dasd_read_alias; /* read request using an alias */ 549 unsigned int dasd_read_tpm; /* read requests in transport mode */ 550 unsigned int dasd_read_secs[32]; /* histogram of request's sizes */ 551 unsigned int dasd_read_times[32]; /* histogram of requests's times */ 552 unsigned int dasd_read_time1[32]; /* hist. time from build to start */ 553 unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */ 554 unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */ 555 unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */ 556 unsigned long dasd_sum_times; /* sum of request times */ 557 unsigned long dasd_sum_time_str; /* sum of time from build to start */ 558 unsigned long dasd_sum_time_irq; /* sum of time from start to irq */ 559 unsigned long dasd_sum_time_end; /* sum of time from irq to end */ 560 }; 561 562 struct dasd_profile { 563 struct dentry *dentry; 564 struct dasd_profile_info *data; 565 spinlock_t lock; 566 }; 567 568 struct dasd_format_entry { 569 struct list_head list; 570 sector_t track; 571 }; 572 573 struct dasd_device { 574 /* Block device stuff. */ 575 struct dasd_block *block; 576 577 unsigned int devindex; 578 unsigned long flags; /* per device flags */ 579 unsigned short features; /* copy of devmap-features (read-only!) */ 580 581 /* extended error reporting stuff (eer) */ 582 struct dasd_ccw_req *eer_cqr; 583 584 /* Device discipline stuff. */ 585 struct dasd_discipline *discipline; 586 struct dasd_discipline *base_discipline; 587 void *private; 588 struct dasd_path path[8]; 589 __u8 opm; 590 591 /* Device state and target state. */ 592 int state, target; 593 struct mutex state_mutex; 594 int stopped; /* device (ccw_device_start) was stopped */ 595 596 /* reference count. */ 597 atomic_t ref_count; 598 599 /* ccw queue and memory for static ccw/erp buffers. */ 600 struct list_head ccw_queue; 601 spinlock_t mem_lock; 602 void *ccw_mem; 603 void *erp_mem; 604 void *ese_mem; 605 struct list_head ccw_chunks; 606 struct list_head erp_chunks; 607 struct list_head ese_chunks; 608 609 atomic_t tasklet_scheduled; 610 struct tasklet_struct tasklet; 611 struct work_struct kick_work; 612 struct work_struct reload_device; 613 struct work_struct kick_validate; 614 struct work_struct suc_work; 615 struct work_struct requeue_requests; 616 struct timer_list timer; 617 618 debug_info_t *debug_area; 619 620 struct ccw_device *cdev; 621 622 /* hook for alias management */ 623 struct list_head alias_list; 624 625 /* default expiration time in s */ 626 unsigned long default_expires; 627 unsigned long default_retries; 628 629 unsigned long blk_timeout; 630 631 unsigned long path_thrhld; 632 unsigned long path_interval; 633 634 struct dentry *debugfs_dentry; 635 struct dentry *hosts_dentry; 636 struct dasd_profile profile; 637 struct dasd_format_entry format_entry; 638 struct kset *paths_info; 639 struct dasd_copy_relation *copy; 640 }; 641 642 struct dasd_block { 643 /* Block device stuff. */ 644 struct gendisk *gdp; 645 spinlock_t request_queue_lock; 646 struct blk_mq_tag_set tag_set; 647 struct block_device *bdev; 648 atomic_t open_count; 649 650 unsigned long blocks; /* size of volume in blocks */ 651 unsigned int bp_block; /* bytes per block */ 652 unsigned int s2b_shift; /* log2 (bp_block/512) */ 653 654 struct dasd_device *base; 655 struct list_head ccw_queue; 656 spinlock_t queue_lock; 657 658 atomic_t tasklet_scheduled; 659 struct tasklet_struct tasklet; 660 struct timer_list timer; 661 662 struct dentry *debugfs_dentry; 663 struct dasd_profile profile; 664 665 struct list_head format_list; 666 spinlock_t format_lock; 667 atomic_t trkcount; 668 }; 669 670 struct dasd_attention_data { 671 struct dasd_device *device; 672 __u8 lpum; 673 }; 674 675 struct dasd_queue { 676 spinlock_t lock; 677 }; 678 679 /* reasons why device (ccw_device_start) was stopped */ 680 #define DASD_STOPPED_NOT_ACC 1 /* not accessible */ 681 #define DASD_STOPPED_QUIESCE 2 /* Quiesced */ 682 #define DASD_STOPPED_PENDING 4 /* long busy */ 683 #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ 684 #define DASD_STOPPED_SU 16 /* summary unit check handling */ 685 #define DASD_STOPPED_PPRC 32 /* PPRC swap */ 686 #define DASD_STOPPED_NOSPC 128 /* no space left */ 687 688 /* per device flags */ 689 #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ 690 #define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ 691 #define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ 692 #define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't 693 * confuse this with the user specified 694 * read-only feature. 695 */ 696 #define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */ 697 #define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */ 698 #define DASD_FLAG_SUSPENDED 9 /* The device was suspended */ 699 #define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/ 700 #define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */ 701 #define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */ 702 #define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */ 703 #define DASD_FLAG_SUC 14 /* unhandled summary unit check */ 704 705 #define DASD_SLEEPON_START_TAG ((void *) 1) 706 #define DASD_SLEEPON_END_TAG ((void *) 2) 707 708 void dasd_put_device_wake(struct dasd_device *); 709 710 /* 711 * return values to be returned from the copy pair swap function 712 * 0x00: swap successful 713 * 0x01: swap data invalid 714 * 0x02: no active device found 715 * 0x03: wrong primary specified 716 * 0x04: secondary device not found 717 * 0x05: swap already running 718 */ 719 #define DASD_COPYPAIRSWAP_SUCCESS 0 720 #define DASD_COPYPAIRSWAP_INVALID 1 721 #define DASD_COPYPAIRSWAP_NOACTIVE 2 722 #define DASD_COPYPAIRSWAP_PRIMARY 3 723 #define DASD_COPYPAIRSWAP_SECONDARY 4 724 #define DASD_COPYPAIRSWAP_MULTIPLE 5 725 726 /* 727 * Reference count inliners 728 */ 729 static inline void 730 dasd_get_device(struct dasd_device *device) 731 { 732 atomic_inc(&device->ref_count); 733 } 734 735 static inline void 736 dasd_put_device(struct dasd_device *device) 737 { 738 if (atomic_dec_return(&device->ref_count) == 0) 739 dasd_put_device_wake(device); 740 } 741 742 /* 743 * The static memory in ccw_mem and erp_mem is managed by a sorted 744 * list of free memory chunks. 745 */ 746 struct dasd_mchunk 747 { 748 struct list_head list; 749 unsigned long size; 750 } __attribute__ ((aligned(8))); 751 752 static inline void 753 dasd_init_chunklist(struct list_head *chunk_list, void *mem, 754 unsigned long size) 755 { 756 struct dasd_mchunk *chunk; 757 758 INIT_LIST_HEAD(chunk_list); 759 chunk = (struct dasd_mchunk *) mem; 760 chunk->size = size - sizeof(struct dasd_mchunk); 761 list_add(&chunk->list, chunk_list); 762 } 763 764 static inline void * 765 dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size) 766 { 767 struct dasd_mchunk *chunk, *tmp; 768 769 size = (size + 7L) & -8L; 770 list_for_each_entry(chunk, chunk_list, list) { 771 if (chunk->size < size) 772 continue; 773 if (chunk->size > size + sizeof(struct dasd_mchunk)) { 774 char *endaddr = (char *) (chunk + 1) + chunk->size; 775 tmp = (struct dasd_mchunk *) (endaddr - size) - 1; 776 tmp->size = size; 777 chunk->size -= size + sizeof(struct dasd_mchunk); 778 chunk = tmp; 779 } else 780 list_del(&chunk->list); 781 return (void *) (chunk + 1); 782 } 783 return NULL; 784 } 785 786 static inline void 787 dasd_free_chunk(struct list_head *chunk_list, void *mem) 788 { 789 struct dasd_mchunk *chunk, *tmp; 790 struct list_head *p, *left; 791 792 chunk = (struct dasd_mchunk *) 793 ((char *) mem - sizeof(struct dasd_mchunk)); 794 /* Find out the left neighbour in chunk_list. */ 795 left = chunk_list; 796 list_for_each(p, chunk_list) { 797 if (list_entry(p, struct dasd_mchunk, list) > chunk) 798 break; 799 left = p; 800 } 801 /* Try to merge with right neighbour = next element from left. */ 802 if (left->next != chunk_list) { 803 tmp = list_entry(left->next, struct dasd_mchunk, list); 804 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) { 805 list_del(&tmp->list); 806 chunk->size += tmp->size + sizeof(struct dasd_mchunk); 807 } 808 } 809 /* Try to merge with left neighbour. */ 810 if (left != chunk_list) { 811 tmp = list_entry(left, struct dasd_mchunk, list); 812 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) { 813 tmp->size += chunk->size + sizeof(struct dasd_mchunk); 814 return; 815 } 816 } 817 __list_add(&chunk->list, left, left->next); 818 } 819 820 /* 821 * Check if bsize is in { 512, 1024, 2048, 4096 } 822 */ 823 static inline int 824 dasd_check_blocksize(int bsize) 825 { 826 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize)) 827 return -EMEDIUMTYPE; 828 return 0; 829 } 830 831 /* 832 * return the callback data of the original request in case there are 833 * ERP requests build on top of it 834 */ 835 static inline void *dasd_get_callback_data(struct dasd_ccw_req *cqr) 836 { 837 while (cqr->refers) 838 cqr = cqr->refers; 839 840 return cqr->callback_data; 841 } 842 843 /* externals in dasd.c */ 844 #define DASD_PROFILE_OFF 0 845 #define DASD_PROFILE_ON 1 846 #define DASD_PROFILE_GLOBAL_ONLY 2 847 848 extern debug_info_t *dasd_debug_area; 849 extern struct dasd_profile dasd_global_profile; 850 extern unsigned int dasd_global_profile_level; 851 extern const struct block_device_operations dasd_device_operations; 852 extern struct blk_mq_ops dasd_mq_ops; 853 854 extern struct kmem_cache *dasd_page_cache; 855 856 struct dasd_ccw_req * 857 dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *); 858 struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *); 859 void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); 860 void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *); 861 void dasd_wakeup_cb(struct dasd_ccw_req *, void *); 862 863 struct dasd_device *dasd_alloc_device(void); 864 void dasd_free_device(struct dasd_device *); 865 866 struct dasd_block *dasd_alloc_block(void); 867 void dasd_free_block(struct dasd_block *); 868 869 enum blk_eh_timer_return dasd_times_out(struct request *req); 870 871 void dasd_enable_device(struct dasd_device *); 872 void dasd_set_target_state(struct dasd_device *, int); 873 void dasd_kick_device(struct dasd_device *); 874 void dasd_reload_device(struct dasd_device *); 875 void dasd_schedule_requeue(struct dasd_device *); 876 877 void dasd_add_request_head(struct dasd_ccw_req *); 878 void dasd_add_request_tail(struct dasd_ccw_req *); 879 int dasd_start_IO(struct dasd_ccw_req *); 880 int dasd_term_IO(struct dasd_ccw_req *); 881 void dasd_schedule_device_bh(struct dasd_device *); 882 void dasd_schedule_block_bh(struct dasd_block *); 883 int dasd_sleep_on(struct dasd_ccw_req *); 884 int dasd_sleep_on_queue(struct list_head *); 885 int dasd_sleep_on_immediatly(struct dasd_ccw_req *); 886 int dasd_sleep_on_queue_interruptible(struct list_head *); 887 int dasd_sleep_on_interruptible(struct dasd_ccw_req *); 888 void dasd_device_set_timer(struct dasd_device *, int); 889 void dasd_device_clear_timer(struct dasd_device *); 890 void dasd_block_set_timer(struct dasd_block *, int); 891 void dasd_block_clear_timer(struct dasd_block *); 892 int dasd_cancel_req(struct dasd_ccw_req *); 893 int dasd_flush_device_queue(struct dasd_device *); 894 int dasd_generic_probe(struct ccw_device *); 895 void dasd_generic_free_discipline(struct dasd_device *); 896 void dasd_generic_remove (struct ccw_device *cdev); 897 int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); 898 int dasd_generic_set_offline (struct ccw_device *cdev); 899 int dasd_generic_notify(struct ccw_device *, int); 900 int dasd_generic_last_path_gone(struct dasd_device *); 901 int dasd_generic_path_operational(struct dasd_device *); 902 void dasd_generic_shutdown(struct ccw_device *); 903 904 void dasd_generic_handle_state_change(struct dasd_device *); 905 enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *); 906 void dasd_generic_path_event(struct ccw_device *, int *); 907 int dasd_generic_verify_path(struct dasd_device *, __u8); 908 void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *); 909 void dasd_generic_space_avail(struct dasd_device *); 910 911 int dasd_generic_requeue_all_requests(struct dasd_device *); 912 913 int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); 914 char *dasd_get_sense(struct irb *); 915 916 void dasd_device_set_stop_bits(struct dasd_device *, int); 917 void dasd_device_remove_stop_bits(struct dasd_device *, int); 918 919 int dasd_device_is_ro(struct dasd_device *); 920 921 void dasd_profile_reset(struct dasd_profile *); 922 int dasd_profile_on(struct dasd_profile *); 923 void dasd_profile_off(struct dasd_profile *); 924 char *dasd_get_user_string(const char __user *, size_t); 925 926 /* externals in dasd_devmap.c */ 927 extern int dasd_max_devindex; 928 extern int dasd_probeonly; 929 extern int dasd_autodetect; 930 extern int dasd_nopav; 931 extern int dasd_nofcx; 932 933 int dasd_devmap_init(void); 934 void dasd_devmap_exit(void); 935 936 struct dasd_device *dasd_create_device(struct ccw_device *); 937 void dasd_delete_device(struct dasd_device *); 938 939 int dasd_get_feature(struct ccw_device *, int); 940 int dasd_set_feature(struct ccw_device *, int, int); 941 942 extern const struct attribute_group *dasd_dev_groups[]; 943 void dasd_path_create_kobj(struct dasd_device *, int); 944 void dasd_path_create_kobjects(struct dasd_device *); 945 void dasd_path_remove_kobjects(struct dasd_device *); 946 947 struct dasd_device *dasd_device_from_cdev(struct ccw_device *); 948 struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *); 949 struct dasd_device *dasd_device_from_devindex(int); 950 951 void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *); 952 struct dasd_device *dasd_device_from_gendisk(struct gendisk *); 953 954 int dasd_parse(void) __init; 955 int dasd_busid_known(const char *); 956 957 /* externals in dasd_gendisk.c */ 958 int dasd_gendisk_init(void); 959 void dasd_gendisk_exit(void); 960 int dasd_gendisk_alloc(struct dasd_block *); 961 void dasd_gendisk_free(struct dasd_block *); 962 int dasd_scan_partitions(struct dasd_block *); 963 void dasd_destroy_partitions(struct dasd_block *); 964 965 /* externals in dasd_ioctl.c */ 966 int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long); 967 int dasd_set_read_only(struct block_device *bdev, bool ro); 968 969 /* externals in dasd_proc.c */ 970 int dasd_proc_init(void); 971 void dasd_proc_exit(void); 972 973 /* externals in dasd_erp.c */ 974 struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); 975 struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); 976 struct dasd_ccw_req *dasd_alloc_erp_request(unsigned int, int, int, 977 struct dasd_device *); 978 void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); 979 void dasd_log_sense(struct dasd_ccw_req *, struct irb *); 980 void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb); 981 982 /* externals in dasd_3990_erp.c */ 983 struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); 984 void dasd_3990_erp_handle_sim(struct dasd_device *, char *); 985 986 /* externals in dasd_eer.c */ 987 #ifdef CONFIG_DASD_EER 988 int dasd_eer_init(void); 989 void dasd_eer_exit(void); 990 int dasd_eer_enable(struct dasd_device *); 991 void dasd_eer_disable(struct dasd_device *); 992 void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, 993 unsigned int id); 994 void dasd_eer_snss(struct dasd_device *); 995 996 static inline int dasd_eer_enabled(struct dasd_device *device) 997 { 998 return device->eer_cqr != NULL; 999 } 1000 #else 1001 #define dasd_eer_init() (0) 1002 #define dasd_eer_exit() do { } while (0) 1003 #define dasd_eer_enable(d) (0) 1004 #define dasd_eer_disable(d) do { } while (0) 1005 #define dasd_eer_write(d,c,i) do { } while (0) 1006 #define dasd_eer_snss(d) do { } while (0) 1007 #define dasd_eer_enabled(d) (0) 1008 #endif /* CONFIG_DASD_ERR */ 1009 1010 1011 /* DASD path handling functions */ 1012 1013 /* 1014 * helper functions to modify bit masks for a given channel path for a device 1015 */ 1016 static inline int dasd_path_is_operational(struct dasd_device *device, int chp) 1017 { 1018 return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 1019 } 1020 1021 static inline int dasd_path_need_verify(struct dasd_device *device, int chp) 1022 { 1023 return test_bit(DASD_PATH_TBV, &device->path[chp].flags); 1024 } 1025 1026 static inline void dasd_path_verify(struct dasd_device *device, int chp) 1027 { 1028 __set_bit(DASD_PATH_TBV, &device->path[chp].flags); 1029 } 1030 1031 static inline void dasd_path_clear_verify(struct dasd_device *device, int chp) 1032 { 1033 __clear_bit(DASD_PATH_TBV, &device->path[chp].flags); 1034 } 1035 1036 static inline void dasd_path_clear_all_verify(struct dasd_device *device) 1037 { 1038 int chp; 1039 1040 for (chp = 0; chp < 8; chp++) 1041 dasd_path_clear_verify(device, chp); 1042 } 1043 1044 static inline void dasd_path_fcsec(struct dasd_device *device, int chp) 1045 { 1046 __set_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 1047 } 1048 1049 static inline void dasd_path_clear_fcsec(struct dasd_device *device, int chp) 1050 { 1051 __clear_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 1052 } 1053 1054 static inline int dasd_path_need_fcsec(struct dasd_device *device, int chp) 1055 { 1056 return test_bit(DASD_PATH_FCSEC, &device->path[chp].flags); 1057 } 1058 1059 static inline void dasd_path_clear_all_fcsec(struct dasd_device *device) 1060 { 1061 int chp; 1062 1063 for (chp = 0; chp < 8; chp++) 1064 dasd_path_clear_fcsec(device, chp); 1065 } 1066 1067 static inline void dasd_path_operational(struct dasd_device *device, int chp) 1068 { 1069 __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 1070 device->opm |= (0x80 >> chp); 1071 } 1072 1073 static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp) 1074 { 1075 __set_bit(DASD_PATH_NPP, &device->path[chp].flags); 1076 } 1077 1078 static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp) 1079 { 1080 return test_bit(DASD_PATH_NPP, &device->path[chp].flags); 1081 } 1082 1083 static inline void dasd_path_clear_nonpreferred(struct dasd_device *device, 1084 int chp) 1085 { 1086 __clear_bit(DASD_PATH_NPP, &device->path[chp].flags); 1087 } 1088 1089 static inline void dasd_path_preferred(struct dasd_device *device, int chp) 1090 { 1091 __set_bit(DASD_PATH_PP, &device->path[chp].flags); 1092 } 1093 1094 static inline int dasd_path_is_preferred(struct dasd_device *device, int chp) 1095 { 1096 return test_bit(DASD_PATH_PP, &device->path[chp].flags); 1097 } 1098 1099 static inline void dasd_path_clear_preferred(struct dasd_device *device, 1100 int chp) 1101 { 1102 __clear_bit(DASD_PATH_PP, &device->path[chp].flags); 1103 } 1104 1105 static inline void dasd_path_clear_oper(struct dasd_device *device, int chp) 1106 { 1107 __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); 1108 device->opm &= ~(0x80 >> chp); 1109 } 1110 1111 static inline void dasd_path_clear_cable(struct dasd_device *device, int chp) 1112 { 1113 __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1114 } 1115 1116 static inline void dasd_path_cuir(struct dasd_device *device, int chp) 1117 { 1118 __set_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1119 } 1120 1121 static inline int dasd_path_is_cuir(struct dasd_device *device, int chp) 1122 { 1123 return test_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1124 } 1125 1126 static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp) 1127 { 1128 __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags); 1129 } 1130 1131 static inline void dasd_path_ifcc(struct dasd_device *device, int chp) 1132 { 1133 set_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1134 } 1135 1136 static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp) 1137 { 1138 return test_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1139 } 1140 1141 static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp) 1142 { 1143 clear_bit(DASD_PATH_IFCC, &device->path[chp].flags); 1144 } 1145 1146 static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp) 1147 { 1148 __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1149 } 1150 1151 static inline void dasd_path_miscabled(struct dasd_device *device, int chp) 1152 { 1153 __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1154 } 1155 1156 static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp) 1157 { 1158 return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); 1159 } 1160 1161 static inline void dasd_path_nohpf(struct dasd_device *device, int chp) 1162 { 1163 __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1164 } 1165 1166 static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp) 1167 { 1168 return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags); 1169 } 1170 1171 /* 1172 * get functions for path masks 1173 * will return a path masks for the given device 1174 */ 1175 1176 static inline __u8 dasd_path_get_opm(struct dasd_device *device) 1177 { 1178 return device->opm; 1179 } 1180 1181 static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device) 1182 { 1183 int chp; 1184 __u8 tbvpm = 0x00; 1185 1186 for (chp = 0; chp < 8; chp++) 1187 if (dasd_path_need_verify(device, chp)) 1188 tbvpm |= 0x80 >> chp; 1189 return tbvpm; 1190 } 1191 1192 static inline int dasd_path_get_fcsecpm(struct dasd_device *device) 1193 { 1194 int chp; 1195 1196 for (chp = 0; chp < 8; chp++) 1197 if (dasd_path_need_fcsec(device, chp)) 1198 return 1; 1199 1200 return 0; 1201 } 1202 1203 static inline __u8 dasd_path_get_nppm(struct dasd_device *device) 1204 { 1205 int chp; 1206 __u8 npm = 0x00; 1207 1208 for (chp = 0; chp < 8; chp++) { 1209 if (dasd_path_is_nonpreferred(device, chp)) 1210 npm |= 0x80 >> chp; 1211 } 1212 return npm; 1213 } 1214 1215 static inline __u8 dasd_path_get_ppm(struct dasd_device *device) 1216 { 1217 int chp; 1218 __u8 ppm = 0x00; 1219 1220 for (chp = 0; chp < 8; chp++) 1221 if (dasd_path_is_preferred(device, chp)) 1222 ppm |= 0x80 >> chp; 1223 return ppm; 1224 } 1225 1226 static inline __u8 dasd_path_get_cablepm(struct dasd_device *device) 1227 { 1228 int chp; 1229 __u8 cablepm = 0x00; 1230 1231 for (chp = 0; chp < 8; chp++) 1232 if (dasd_path_is_miscabled(device, chp)) 1233 cablepm |= 0x80 >> chp; 1234 return cablepm; 1235 } 1236 1237 static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device) 1238 { 1239 int chp; 1240 __u8 cuirpm = 0x00; 1241 1242 for (chp = 0; chp < 8; chp++) 1243 if (dasd_path_is_cuir(device, chp)) 1244 cuirpm |= 0x80 >> chp; 1245 return cuirpm; 1246 } 1247 1248 static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device) 1249 { 1250 int chp; 1251 __u8 ifccpm = 0x00; 1252 1253 for (chp = 0; chp < 8; chp++) 1254 if (dasd_path_is_ifcc(device, chp)) 1255 ifccpm |= 0x80 >> chp; 1256 return ifccpm; 1257 } 1258 1259 static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device) 1260 { 1261 int chp; 1262 __u8 hpfpm = 0x00; 1263 1264 for (chp = 0; chp < 8; chp++) 1265 if (dasd_path_is_nohpf(device, chp)) 1266 hpfpm |= 0x80 >> chp; 1267 return hpfpm; 1268 } 1269 1270 static inline u8 dasd_path_get_fcs_path(struct dasd_device *device, int chp) 1271 { 1272 return device->path[chp].fc_security; 1273 } 1274 1275 static inline int dasd_path_get_fcs_device(struct dasd_device *device) 1276 { 1277 u8 fc_sec = 0; 1278 int chp; 1279 1280 for (chp = 0; chp < 8; chp++) { 1281 if (device->opm & (0x80 >> chp)) { 1282 fc_sec = device->path[chp].fc_security; 1283 break; 1284 } 1285 } 1286 for (; chp < 8; chp++) { 1287 if (device->opm & (0x80 >> chp)) 1288 if (device->path[chp].fc_security != fc_sec) 1289 return -EINVAL; 1290 } 1291 1292 return fc_sec; 1293 } 1294 1295 /* 1296 * add functions for path masks 1297 * the existing path mask will be extended by the given path mask 1298 */ 1299 static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm) 1300 { 1301 int chp; 1302 1303 for (chp = 0; chp < 8; chp++) 1304 if (pm & (0x80 >> chp)) 1305 dasd_path_verify(device, chp); 1306 } 1307 1308 static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device) 1309 { 1310 int chp; 1311 __u8 nopm = 0x00; 1312 1313 for (chp = 0; chp < 8; chp++) 1314 if (dasd_path_is_nohpf(device, chp) || 1315 dasd_path_is_ifcc(device, chp) || 1316 dasd_path_is_cuir(device, chp) || 1317 dasd_path_is_miscabled(device, chp)) 1318 nopm |= 0x80 >> chp; 1319 return nopm; 1320 } 1321 1322 static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm) 1323 { 1324 int chp; 1325 1326 for (chp = 0; chp < 8; chp++) 1327 if (pm & (0x80 >> chp)) { 1328 dasd_path_operational(device, chp); 1329 /* 1330 * if the path is used 1331 * it should not be in one of the negative lists 1332 */ 1333 dasd_path_clear_nohpf(device, chp); 1334 dasd_path_clear_cuir(device, chp); 1335 dasd_path_clear_cable(device, chp); 1336 dasd_path_clear_ifcc(device, chp); 1337 } 1338 } 1339 1340 static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm) 1341 { 1342 int chp; 1343 1344 for (chp = 0; chp < 8; chp++) 1345 if (pm & (0x80 >> chp)) 1346 dasd_path_miscabled(device, chp); 1347 } 1348 1349 static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm) 1350 { 1351 int chp; 1352 1353 for (chp = 0; chp < 8; chp++) 1354 if (pm & (0x80 >> chp)) 1355 dasd_path_cuir(device, chp); 1356 } 1357 1358 static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm) 1359 { 1360 int chp; 1361 1362 for (chp = 0; chp < 8; chp++) 1363 if (pm & (0x80 >> chp)) 1364 dasd_path_ifcc(device, chp); 1365 } 1366 1367 static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm) 1368 { 1369 int chp; 1370 1371 for (chp = 0; chp < 8; chp++) 1372 if (pm & (0x80 >> chp)) 1373 dasd_path_nonpreferred(device, chp); 1374 } 1375 1376 static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm) 1377 { 1378 int chp; 1379 1380 for (chp = 0; chp < 8; chp++) 1381 if (pm & (0x80 >> chp)) 1382 dasd_path_nohpf(device, chp); 1383 } 1384 1385 static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm) 1386 { 1387 int chp; 1388 1389 for (chp = 0; chp < 8; chp++) 1390 if (pm & (0x80 >> chp)) 1391 dasd_path_preferred(device, chp); 1392 } 1393 1394 static inline void dasd_path_add_fcsecpm(struct dasd_device *device, __u8 pm) 1395 { 1396 int chp; 1397 1398 for (chp = 0; chp < 8; chp++) 1399 if (pm & (0x80 >> chp)) 1400 dasd_path_fcsec(device, chp); 1401 } 1402 1403 /* 1404 * set functions for path masks 1405 * the existing path mask will be replaced by the given path mask 1406 */ 1407 static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm) 1408 { 1409 int chp; 1410 1411 for (chp = 0; chp < 8; chp++) 1412 if (pm & (0x80 >> chp)) 1413 dasd_path_verify(device, chp); 1414 else 1415 dasd_path_clear_verify(device, chp); 1416 } 1417 1418 static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm) 1419 { 1420 int chp; 1421 1422 for (chp = 0; chp < 8; chp++) { 1423 dasd_path_clear_oper(device, chp); 1424 if (pm & (0x80 >> chp)) { 1425 dasd_path_operational(device, chp); 1426 /* 1427 * if the path is used 1428 * it should not be in one of the negative lists 1429 */ 1430 dasd_path_clear_nohpf(device, chp); 1431 dasd_path_clear_cuir(device, chp); 1432 dasd_path_clear_cable(device, chp); 1433 dasd_path_clear_ifcc(device, chp); 1434 } 1435 } 1436 } 1437 1438 /* 1439 * remove functions for path masks 1440 * the existing path mask will be cleared with the given path mask 1441 */ 1442 static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm) 1443 { 1444 int chp; 1445 1446 for (chp = 0; chp < 8; chp++) { 1447 if (pm & (0x80 >> chp)) 1448 dasd_path_clear_oper(device, chp); 1449 } 1450 } 1451 1452 /* 1453 * add the newly available path to the to be verified pm and remove it from 1454 * normal operation until it is verified 1455 */ 1456 static inline void dasd_path_available(struct dasd_device *device, int chp) 1457 { 1458 dasd_path_clear_oper(device, chp); 1459 dasd_path_verify(device, chp); 1460 } 1461 1462 static inline void dasd_path_notoper(struct dasd_device *device, int chp) 1463 { 1464 dasd_path_clear_oper(device, chp); 1465 dasd_path_clear_preferred(device, chp); 1466 dasd_path_clear_nonpreferred(device, chp); 1467 } 1468 1469 static inline void dasd_path_fcsec_update(struct dasd_device *device, int chp) 1470 { 1471 dasd_path_fcsec(device, chp); 1472 } 1473 1474 /* 1475 * remove all paths from normal operation 1476 */ 1477 static inline void dasd_path_no_path(struct dasd_device *device) 1478 { 1479 int chp; 1480 1481 for (chp = 0; chp < 8; chp++) 1482 dasd_path_notoper(device, chp); 1483 1484 dasd_path_clear_all_verify(device); 1485 } 1486 1487 /* end - path handling */ 1488 1489 #endif /* DASD_H */ 1490