1 /* 2 * This file is part of the zfcp device driver for 3 * FCP adapters for IBM System z9 and zSeries. 4 * 5 * (C) Copyright IBM Corp. 2002, 2006 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2, or (at your option) 10 * any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 */ 21 22 23 #ifndef ZFCP_DEF_H 24 #define ZFCP_DEF_H 25 26 /*************************** INCLUDES *****************************************/ 27 28 #include <linux/init.h> 29 #include <linux/moduleparam.h> 30 #include <linux/miscdevice.h> 31 #include <linux/major.h> 32 #include <linux/blkdev.h> 33 #include <linux/delay.h> 34 #include <linux/timer.h> 35 #include <scsi/scsi.h> 36 #include <scsi/scsi_tcq.h> 37 #include <scsi/scsi_cmnd.h> 38 #include <scsi/scsi_device.h> 39 #include <scsi/scsi_host.h> 40 #include <scsi/scsi_transport.h> 41 #include <scsi/scsi_transport_fc.h> 42 #include "zfcp_fsf.h" 43 #include <asm/ccwdev.h> 44 #include <asm/qdio.h> 45 #include <asm/debug.h> 46 #include <asm/ebcdic.h> 47 #include <linux/mempool.h> 48 #include <linux/syscalls.h> 49 #include <linux/ioctl.h> 50 51 52 /********************* GENERAL DEFINES *********************************/ 53 54 /* zfcp version number, it consists of major, minor, and patch-level number */ 55 #define ZFCP_VERSION "4.8.0" 56 57 /** 58 * zfcp_sg_to_address - determine kernel address from struct scatterlist 59 * @list: struct scatterlist 60 * Return: kernel address 61 */ 62 static inline void * 63 zfcp_sg_to_address(struct scatterlist *list) 64 { 65 return (void *) (page_address(list->page) + list->offset); 66 } 67 68 /** 69 * zfcp_address_to_sg - set up struct scatterlist from kernel address 70 * @address: kernel address 71 * @list: struct scatterlist 72 */ 73 static inline void 74 zfcp_address_to_sg(void *address, struct scatterlist *list) 75 { 76 list->page = virt_to_page(address); 77 list->offset = ((unsigned long) address) & (PAGE_SIZE - 1); 78 } 79 80 #define REQUEST_LIST_SIZE 128 81 82 /********************* SCSI SPECIFIC DEFINES *********************************/ 83 #define ZFCP_SCSI_ER_TIMEOUT (10*HZ) 84 85 /********************* CIO/QDIO SPECIFIC DEFINES *****************************/ 86 87 /* Adapter Identification Parameters */ 88 #define ZFCP_CONTROL_UNIT_TYPE 0x1731 89 #define ZFCP_CONTROL_UNIT_MODEL 0x03 90 #define ZFCP_DEVICE_TYPE 0x1732 91 #define ZFCP_DEVICE_MODEL 0x03 92 #define ZFCP_DEVICE_MODEL_PRIV 0x04 93 94 /* allow as many chained SBALs as are supported by hardware */ 95 #define ZFCP_MAX_SBALS_PER_REQ FSF_MAX_SBALS_PER_REQ 96 #define ZFCP_MAX_SBALS_PER_CT_REQ FSF_MAX_SBALS_PER_REQ 97 #define ZFCP_MAX_SBALS_PER_ELS_REQ FSF_MAX_SBALS_PER_ELS_REQ 98 99 /* DMQ bug workaround: don't use last SBALE */ 100 #define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1) 101 102 /* index of last SBALE (with respect to DMQ bug workaround) */ 103 #define ZFCP_LAST_SBALE_PER_SBAL (ZFCP_MAX_SBALES_PER_SBAL - 1) 104 105 /* max. number of (data buffer) SBALEs in largest SBAL chain */ 106 #define ZFCP_MAX_SBALES_PER_REQ \ 107 (ZFCP_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2) 108 /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */ 109 110 /* FIXME(tune): free space should be one max. SBAL chain plus what? */ 111 #define ZFCP_QDIO_PCI_INTERVAL (QDIO_MAX_BUFFERS_PER_Q \ 112 - (ZFCP_MAX_SBALS_PER_REQ + 4)) 113 114 #define ZFCP_SBAL_TIMEOUT (5*HZ) 115 116 #define ZFCP_TYPE2_RECOVERY_TIME (8*HZ) 117 118 /* queue polling (values in microseconds) */ 119 #define ZFCP_MAX_INPUT_THRESHOLD 5000 /* FIXME: tune */ 120 #define ZFCP_MAX_OUTPUT_THRESHOLD 1000 /* FIXME: tune */ 121 #define ZFCP_MIN_INPUT_THRESHOLD 1 /* ignored by QDIO layer */ 122 #define ZFCP_MIN_OUTPUT_THRESHOLD 1 /* ignored by QDIO layer */ 123 124 #define QDIO_SCSI_QFMT 1 /* 1 for FSF */ 125 126 /********************* FSF SPECIFIC DEFINES *********************************/ 127 128 #define ZFCP_ULP_INFO_VERSION 26 129 #define ZFCP_QTCB_VERSION FSF_QTCB_CURRENT_VERSION 130 /* ATTENTION: value must not be used by hardware */ 131 #define FSF_QTCB_UNSOLICITED_STATUS 0x6305 132 #define ZFCP_STATUS_READ_FAILED_THRESHOLD 3 133 #define ZFCP_STATUS_READS_RECOM FSF_STATUS_READS_RECOM 134 135 /* Do 1st retry in 1 second, then double the timeout for each following retry */ 136 #define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP 100 137 #define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES 7 138 139 /* timeout value for "default timer" for fsf requests */ 140 #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ); 141 142 /*************** FIBRE CHANNEL PROTOCOL SPECIFIC DEFINES ********************/ 143 144 typedef unsigned long long wwn_t; 145 typedef unsigned long long fcp_lun_t; 146 /* data length field may be at variable position in FCP-2 FCP_CMND IU */ 147 typedef unsigned int fcp_dl_t; 148 149 #define ZFCP_FC_SERVICE_CLASS_DEFAULT FSF_CLASS_3 150 151 /* timeout for name-server lookup (in seconds) */ 152 #define ZFCP_NS_GID_PN_TIMEOUT 10 153 154 /* largest SCSI command we can process */ 155 /* FCP-2 (FCP_CMND IU) allows up to (255-3+16) */ 156 #define ZFCP_MAX_SCSI_CMND_LENGTH 255 157 /* maximum number of commands in LUN queue (tagged queueing) */ 158 #define ZFCP_CMND_PER_LUN 32 159 160 /* task attribute values in FCP-2 FCP_CMND IU */ 161 #define SIMPLE_Q 0 162 #define HEAD_OF_Q 1 163 #define ORDERED_Q 2 164 #define ACA_Q 4 165 #define UNTAGGED 5 166 167 /* task management flags in FCP-2 FCP_CMND IU */ 168 #define FCP_CLEAR_ACA 0x40 169 #define FCP_TARGET_RESET 0x20 170 #define FCP_LOGICAL_UNIT_RESET 0x10 171 #define FCP_CLEAR_TASK_SET 0x04 172 #define FCP_ABORT_TASK_SET 0x02 173 174 #define FCP_CDB_LENGTH 16 175 176 #define ZFCP_DID_MASK 0x00FFFFFF 177 178 /* FCP(-2) FCP_CMND IU */ 179 struct fcp_cmnd_iu { 180 fcp_lun_t fcp_lun; /* FCP logical unit number */ 181 u8 crn; /* command reference number */ 182 u8 reserved0:5; /* reserved */ 183 u8 task_attribute:3; /* task attribute */ 184 u8 task_management_flags; /* task management flags */ 185 u8 add_fcp_cdb_length:6; /* additional FCP_CDB length */ 186 u8 rddata:1; /* read data */ 187 u8 wddata:1; /* write data */ 188 u8 fcp_cdb[FCP_CDB_LENGTH]; 189 } __attribute__((packed)); 190 191 /* FCP(-2) FCP_RSP IU */ 192 struct fcp_rsp_iu { 193 u8 reserved0[10]; 194 union { 195 struct { 196 u8 reserved1:3; 197 u8 fcp_conf_req:1; 198 u8 fcp_resid_under:1; 199 u8 fcp_resid_over:1; 200 u8 fcp_sns_len_valid:1; 201 u8 fcp_rsp_len_valid:1; 202 } bits; 203 u8 value; 204 } validity; 205 u8 scsi_status; 206 u32 fcp_resid; 207 u32 fcp_sns_len; 208 u32 fcp_rsp_len; 209 } __attribute__((packed)); 210 211 212 #define RSP_CODE_GOOD 0 213 #define RSP_CODE_LENGTH_MISMATCH 1 214 #define RSP_CODE_FIELD_INVALID 2 215 #define RSP_CODE_RO_MISMATCH 3 216 #define RSP_CODE_TASKMAN_UNSUPP 4 217 #define RSP_CODE_TASKMAN_FAILED 5 218 219 /* see fc-fs */ 220 #define LS_RSCN 0x61040000 221 #define LS_LOGO 0x05000000 222 #define LS_PLOGI 0x03000000 223 224 struct fcp_rscn_head { 225 u8 command; 226 u8 page_length; /* always 0x04 */ 227 u16 payload_len; 228 } __attribute__((packed)); 229 230 struct fcp_rscn_element { 231 u8 reserved:2; 232 u8 event_qual:4; 233 u8 addr_format:2; 234 u32 nport_did:24; 235 } __attribute__((packed)); 236 237 #define ZFCP_PORT_ADDRESS 0x0 238 #define ZFCP_AREA_ADDRESS 0x1 239 #define ZFCP_DOMAIN_ADDRESS 0x2 240 #define ZFCP_FABRIC_ADDRESS 0x3 241 242 #define ZFCP_PORTS_RANGE_PORT 0xFFFFFF 243 #define ZFCP_PORTS_RANGE_AREA 0xFFFF00 244 #define ZFCP_PORTS_RANGE_DOMAIN 0xFF0000 245 #define ZFCP_PORTS_RANGE_FABRIC 0x000000 246 247 #define ZFCP_NO_PORTS_PER_AREA 0x100 248 #define ZFCP_NO_PORTS_PER_DOMAIN 0x10000 249 #define ZFCP_NO_PORTS_PER_FABRIC 0x1000000 250 251 /* see fc-ph */ 252 struct fcp_logo { 253 u32 command; 254 u32 nport_did; 255 wwn_t nport_wwpn; 256 } __attribute__((packed)); 257 258 /* 259 * DBF stuff 260 */ 261 #define ZFCP_DBF_TAG_SIZE 4 262 263 struct zfcp_dbf_dump { 264 u8 tag[ZFCP_DBF_TAG_SIZE]; 265 u32 total_size; /* size of total dump data */ 266 u32 offset; /* how much data has being already dumped */ 267 u32 size; /* how much data comes with this record */ 268 u8 data[]; /* dump data */ 269 } __attribute__ ((packed)); 270 271 /* FIXME: to be inflated when reworking the erp dbf */ 272 struct zfcp_erp_dbf_record { 273 u8 dummy[16]; 274 } __attribute__ ((packed)); 275 276 struct zfcp_hba_dbf_record_response { 277 u32 fsf_command; 278 u64 fsf_reqid; 279 u32 fsf_seqno; 280 u64 fsf_issued; 281 u32 fsf_prot_status; 282 u32 fsf_status; 283 u8 fsf_prot_status_qual[FSF_PROT_STATUS_QUAL_SIZE]; 284 u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE]; 285 u32 fsf_req_status; 286 u8 sbal_first; 287 u8 sbal_curr; 288 u8 sbal_last; 289 u8 pool; 290 u64 erp_action; 291 union { 292 struct { 293 u64 scsi_cmnd; 294 u64 scsi_serial; 295 } send_fcp; 296 struct { 297 u64 wwpn; 298 u32 d_id; 299 u32 port_handle; 300 } port; 301 struct { 302 u64 wwpn; 303 u64 fcp_lun; 304 u32 port_handle; 305 u32 lun_handle; 306 } unit; 307 struct { 308 u32 d_id; 309 u8 ls_code; 310 } send_els; 311 } data; 312 } __attribute__ ((packed)); 313 314 struct zfcp_hba_dbf_record_status { 315 u8 failed; 316 u32 status_type; 317 u32 status_subtype; 318 struct fsf_queue_designator 319 queue_designator; 320 u32 payload_size; 321 #define ZFCP_DBF_UNSOL_PAYLOAD 80 322 #define ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL 32 323 #define ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD 56 324 #define ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT 2 * sizeof(u32) 325 u8 payload[ZFCP_DBF_UNSOL_PAYLOAD]; 326 } __attribute__ ((packed)); 327 328 struct zfcp_hba_dbf_record_qdio { 329 u32 status; 330 u32 qdio_error; 331 u32 siga_error; 332 u8 sbal_index; 333 u8 sbal_count; 334 } __attribute__ ((packed)); 335 336 struct zfcp_hba_dbf_record { 337 u8 tag[ZFCP_DBF_TAG_SIZE]; 338 u8 tag2[ZFCP_DBF_TAG_SIZE]; 339 union { 340 struct zfcp_hba_dbf_record_response response; 341 struct zfcp_hba_dbf_record_status status; 342 struct zfcp_hba_dbf_record_qdio qdio; 343 } type; 344 } __attribute__ ((packed)); 345 346 struct zfcp_san_dbf_record_ct { 347 union { 348 struct { 349 u16 cmd_req_code; 350 u8 revision; 351 u8 gs_type; 352 u8 gs_subtype; 353 u8 options; 354 u16 max_res_size; 355 } request; 356 struct { 357 u16 cmd_rsp_code; 358 u8 revision; 359 u8 reason_code; 360 u8 reason_code_expl; 361 u8 vendor_unique; 362 } response; 363 } type; 364 u32 payload_size; 365 #define ZFCP_DBF_CT_PAYLOAD 24 366 u8 payload[ZFCP_DBF_CT_PAYLOAD]; 367 } __attribute__ ((packed)); 368 369 struct zfcp_san_dbf_record_els { 370 u8 ls_code; 371 u32 payload_size; 372 #define ZFCP_DBF_ELS_PAYLOAD 32 373 #define ZFCP_DBF_ELS_MAX_PAYLOAD 1024 374 u8 payload[ZFCP_DBF_ELS_PAYLOAD]; 375 } __attribute__ ((packed)); 376 377 struct zfcp_san_dbf_record { 378 u8 tag[ZFCP_DBF_TAG_SIZE]; 379 u64 fsf_reqid; 380 u32 fsf_seqno; 381 u32 s_id; 382 u32 d_id; 383 union { 384 struct zfcp_san_dbf_record_ct ct; 385 struct zfcp_san_dbf_record_els els; 386 } type; 387 } __attribute__ ((packed)); 388 389 struct zfcp_scsi_dbf_record { 390 u8 tag[ZFCP_DBF_TAG_SIZE]; 391 u8 tag2[ZFCP_DBF_TAG_SIZE]; 392 u32 scsi_id; 393 u32 scsi_lun; 394 u32 scsi_result; 395 u64 scsi_cmnd; 396 u64 scsi_serial; 397 #define ZFCP_DBF_SCSI_OPCODE 16 398 u8 scsi_opcode[ZFCP_DBF_SCSI_OPCODE]; 399 u8 scsi_retries; 400 u8 scsi_allowed; 401 u64 fsf_reqid; 402 u32 fsf_seqno; 403 u64 fsf_issued; 404 union { 405 u64 old_fsf_reqid; 406 struct { 407 u8 rsp_validity; 408 u8 rsp_scsi_status; 409 u32 rsp_resid; 410 u8 rsp_code; 411 #define ZFCP_DBF_SCSI_FCP_SNS_INFO 16 412 #define ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO 256 413 u32 sns_info_len; 414 u8 sns_info[ZFCP_DBF_SCSI_FCP_SNS_INFO]; 415 } fcp; 416 } type; 417 } __attribute__ ((packed)); 418 419 /* 420 * FC-FS stuff 421 */ 422 #define R_A_TOV 10 /* seconds */ 423 #define ZFCP_ELS_TIMEOUT (2 * R_A_TOV) 424 425 #define ZFCP_LS_RLS 0x0f 426 #define ZFCP_LS_ADISC 0x52 427 #define ZFCP_LS_RPS 0x56 428 #define ZFCP_LS_RSCN 0x61 429 #define ZFCP_LS_RNID 0x78 430 431 struct zfcp_ls_rjt_par { 432 u8 action; 433 u8 reason_code; 434 u8 reason_expl; 435 u8 vendor_unique; 436 } __attribute__ ((packed)); 437 438 struct zfcp_ls_adisc { 439 u8 code; 440 u8 field[3]; 441 u32 hard_nport_id; 442 u64 wwpn; 443 u64 wwnn; 444 u32 nport_id; 445 } __attribute__ ((packed)); 446 447 struct zfcp_ls_adisc_acc { 448 u8 code; 449 u8 field[3]; 450 u32 hard_nport_id; 451 u64 wwpn; 452 u64 wwnn; 453 u32 nport_id; 454 } __attribute__ ((packed)); 455 456 struct zfcp_rc_entry { 457 u8 code; 458 const char *description; 459 }; 460 461 /* 462 * FC-GS-2 stuff 463 */ 464 #define ZFCP_CT_REVISION 0x01 465 #define ZFCP_CT_DIRECTORY_SERVICE 0xFC 466 #define ZFCP_CT_NAME_SERVER 0x02 467 #define ZFCP_CT_SYNCHRONOUS 0x00 468 #define ZFCP_CT_GID_PN 0x0121 469 #define ZFCP_CT_MAX_SIZE 0x1020 470 #define ZFCP_CT_ACCEPT 0x8002 471 #define ZFCP_CT_REJECT 0x8001 472 473 /* 474 * FC-GS-4 stuff 475 */ 476 #define ZFCP_CT_TIMEOUT (3 * R_A_TOV) 477 478 /******************** LOGGING MACROS AND DEFINES *****************************/ 479 480 /* 481 * Logging may be applied on certain kinds of driver operations 482 * independently. Additionally, different log-levels are supported for 483 * each of these areas. 484 */ 485 486 #define ZFCP_NAME "zfcp" 487 488 /* independent log areas */ 489 #define ZFCP_LOG_AREA_OTHER 0 490 #define ZFCP_LOG_AREA_SCSI 1 491 #define ZFCP_LOG_AREA_FSF 2 492 #define ZFCP_LOG_AREA_CONFIG 3 493 #define ZFCP_LOG_AREA_CIO 4 494 #define ZFCP_LOG_AREA_QDIO 5 495 #define ZFCP_LOG_AREA_ERP 6 496 #define ZFCP_LOG_AREA_FC 7 497 498 /* log level values*/ 499 #define ZFCP_LOG_LEVEL_NORMAL 0 500 #define ZFCP_LOG_LEVEL_INFO 1 501 #define ZFCP_LOG_LEVEL_DEBUG 2 502 #define ZFCP_LOG_LEVEL_TRACE 3 503 504 /* 505 * this allows removal of logging code by the preprocessor 506 * (the most detailed log level still to be compiled in is specified, 507 * higher log levels are removed) 508 */ 509 #define ZFCP_LOG_LEVEL_LIMIT ZFCP_LOG_LEVEL_TRACE 510 511 /* get "loglevel" nibble assignment */ 512 #define ZFCP_GET_LOG_VALUE(zfcp_lognibble) \ 513 ((atomic_read(&zfcp_data.loglevel) >> (zfcp_lognibble<<2)) & 0xF) 514 515 /* set "loglevel" nibble */ 516 #define ZFCP_SET_LOG_NIBBLE(value, zfcp_lognibble) \ 517 (value << (zfcp_lognibble << 2)) 518 519 /* all log-level defaults are combined to generate initial log-level */ 520 #define ZFCP_LOG_LEVEL_DEFAULTS \ 521 (ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_OTHER) | \ 522 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_SCSI) | \ 523 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FSF) | \ 524 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CONFIG) | \ 525 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CIO) | \ 526 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_QDIO) | \ 527 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_ERP) | \ 528 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FC)) 529 530 /* check whether we have the right level for logging */ 531 #define ZFCP_LOG_CHECK(level) \ 532 ((ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA)) >= level) 533 534 /* logging routine for zfcp */ 535 #define _ZFCP_LOG(fmt, args...) \ 536 printk(KERN_ERR ZFCP_NAME": %s(%d): " fmt, __FUNCTION__, \ 537 __LINE__ , ##args) 538 539 #define ZFCP_LOG(level, fmt, args...) \ 540 do { \ 541 if (ZFCP_LOG_CHECK(level)) \ 542 _ZFCP_LOG(fmt, ##args); \ 543 } while (0) 544 545 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_NORMAL 546 # define ZFCP_LOG_NORMAL(fmt, args...) do { } while (0) 547 #else 548 # define ZFCP_LOG_NORMAL(fmt, args...) \ 549 do { \ 550 if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_NORMAL)) \ 551 printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \ 552 } while (0) 553 #endif 554 555 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_INFO 556 # define ZFCP_LOG_INFO(fmt, args...) do { } while (0) 557 #else 558 # define ZFCP_LOG_INFO(fmt, args...) \ 559 do { \ 560 if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_INFO)) \ 561 printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \ 562 } while (0) 563 #endif 564 565 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_DEBUG 566 # define ZFCP_LOG_DEBUG(fmt, args...) do { } while (0) 567 #else 568 # define ZFCP_LOG_DEBUG(fmt, args...) \ 569 ZFCP_LOG(ZFCP_LOG_LEVEL_DEBUG, fmt , ##args) 570 #endif 571 572 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_TRACE 573 # define ZFCP_LOG_TRACE(fmt, args...) do { } while (0) 574 #else 575 # define ZFCP_LOG_TRACE(fmt, args...) \ 576 ZFCP_LOG(ZFCP_LOG_LEVEL_TRACE, fmt , ##args) 577 #endif 578 579 /*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/ 580 581 /* 582 * Note, the leftmost status byte is common among adapter, port 583 * and unit 584 */ 585 #define ZFCP_COMMON_FLAGS 0xfff00000 586 587 /* common status bits */ 588 #define ZFCP_STATUS_COMMON_REMOVE 0x80000000 589 #define ZFCP_STATUS_COMMON_RUNNING 0x40000000 590 #define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000 591 #define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000 592 #define ZFCP_STATUS_COMMON_OPENING 0x08000000 593 #define ZFCP_STATUS_COMMON_OPEN 0x04000000 594 #define ZFCP_STATUS_COMMON_CLOSING 0x02000000 595 #define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000 596 #define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000 597 #define ZFCP_STATUS_COMMON_ACCESS_BOXED 0x00400000 598 599 /* adapter status */ 600 #define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002 601 #define ZFCP_STATUS_ADAPTER_REGISTERED 0x00000004 602 #define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008 603 #define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010 604 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_UP 0x00000020 605 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL 0x00000080 606 #define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100 607 #define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200 608 #define ZFCP_STATUS_ADAPTER_XPORT_OK 0x00000800 609 610 /* FC-PH/FC-GS well-known address identifiers for generic services */ 611 #define ZFCP_DID_MANAGEMENT_SERVICE 0xFFFFFA 612 #define ZFCP_DID_TIME_SERVICE 0xFFFFFB 613 #define ZFCP_DID_DIRECTORY_SERVICE 0xFFFFFC 614 #define ZFCP_DID_ALIAS_SERVICE 0xFFFFF8 615 #define ZFCP_DID_KEY_DISTRIBUTION_SERVICE 0xFFFFF7 616 617 /* remote port status */ 618 #define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001 619 #define ZFCP_STATUS_PORT_DID_DID 0x00000002 620 #define ZFCP_STATUS_PORT_PHYS_CLOSING 0x00000004 621 #define ZFCP_STATUS_PORT_NO_WWPN 0x00000008 622 #define ZFCP_STATUS_PORT_NO_SCSI_ID 0x00000010 623 #define ZFCP_STATUS_PORT_INVALID_WWPN 0x00000020 624 625 /* for ports with well known addresses */ 626 #define ZFCP_STATUS_PORT_WKA \ 627 (ZFCP_STATUS_PORT_NO_WWPN | \ 628 ZFCP_STATUS_PORT_NO_SCSI_ID) 629 630 /* logical unit status */ 631 #define ZFCP_STATUS_UNIT_NOTSUPPUNITRESET 0x00000001 632 #define ZFCP_STATUS_UNIT_TEMPORARY 0x00000002 633 #define ZFCP_STATUS_UNIT_SHARED 0x00000004 634 #define ZFCP_STATUS_UNIT_READONLY 0x00000008 635 #define ZFCP_STATUS_UNIT_REGISTERED 0x00000010 636 637 /* FSF request status (this does not have a common part) */ 638 #define ZFCP_STATUS_FSFREQ_NOT_INIT 0x00000000 639 #define ZFCP_STATUS_FSFREQ_POOL 0x00000001 640 #define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT 0x00000002 641 #define ZFCP_STATUS_FSFREQ_COMPLETED 0x00000004 642 #define ZFCP_STATUS_FSFREQ_ERROR 0x00000008 643 #define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010 644 #define ZFCP_STATUS_FSFREQ_ABORTING 0x00000020 645 #define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040 646 #define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080 647 #define ZFCP_STATUS_FSFREQ_ABORTED 0x00000100 648 #define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200 649 #define ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP 0x00000400 650 #define ZFCP_STATUS_FSFREQ_RETRY 0x00000800 651 #define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000 652 653 /*********************** ERROR RECOVERY PROCEDURE DEFINES ********************/ 654 655 #define ZFCP_MAX_ERPS 3 656 657 #define ZFCP_ERP_FSFREQ_TIMEOUT (30 * HZ) 658 #define ZFCP_ERP_MEMWAIT_TIMEOUT HZ 659 660 #define ZFCP_STATUS_ERP_TIMEDOUT 0x10000000 661 #define ZFCP_STATUS_ERP_CLOSE_ONLY 0x01000000 662 #define ZFCP_STATUS_ERP_DISMISSING 0x00100000 663 #define ZFCP_STATUS_ERP_DISMISSED 0x00200000 664 #define ZFCP_STATUS_ERP_LOWMEM 0x00400000 665 666 #define ZFCP_ERP_STEP_UNINITIALIZED 0x00000000 667 #define ZFCP_ERP_STEP_FSF_XCONFIG 0x00000001 668 #define ZFCP_ERP_STEP_PHYS_PORT_CLOSING 0x00000010 669 #define ZFCP_ERP_STEP_PORT_CLOSING 0x00000100 670 #define ZFCP_ERP_STEP_NAMESERVER_OPEN 0x00000200 671 #define ZFCP_ERP_STEP_NAMESERVER_LOOKUP 0x00000400 672 #define ZFCP_ERP_STEP_PORT_OPENING 0x00000800 673 #define ZFCP_ERP_STEP_UNIT_CLOSING 0x00001000 674 #define ZFCP_ERP_STEP_UNIT_OPENING 0x00002000 675 676 /* Ordered by escalation level (necessary for proper erp-code operation) */ 677 #define ZFCP_ERP_ACTION_REOPEN_ADAPTER 0x4 678 #define ZFCP_ERP_ACTION_REOPEN_PORT_FORCED 0x3 679 #define ZFCP_ERP_ACTION_REOPEN_PORT 0x2 680 #define ZFCP_ERP_ACTION_REOPEN_UNIT 0x1 681 682 #define ZFCP_ERP_ACTION_RUNNING 0x1 683 #define ZFCP_ERP_ACTION_READY 0x2 684 685 #define ZFCP_ERP_SUCCEEDED 0x0 686 #define ZFCP_ERP_FAILED 0x1 687 #define ZFCP_ERP_CONTINUES 0x2 688 #define ZFCP_ERP_EXIT 0x3 689 #define ZFCP_ERP_DISMISSED 0x4 690 #define ZFCP_ERP_NOMEM 0x5 691 692 693 /******************** CFDC SPECIFIC STUFF *****************************/ 694 695 /* Firewall data channel sense data record */ 696 struct zfcp_cfdc_sense_data { 697 u32 signature; /* Request signature */ 698 u32 devno; /* FCP adapter device number */ 699 u32 command; /* Command code */ 700 u32 fsf_status; /* FSF request status and status qualifier */ 701 u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE]; 702 u8 payloads[256]; /* Access conflicts list */ 703 u8 control_file[0]; /* Access control table */ 704 }; 705 706 #define ZFCP_CFDC_SIGNATURE 0xCFDCACDF 707 708 #define ZFCP_CFDC_CMND_DOWNLOAD_NORMAL 0x00010001 709 #define ZFCP_CFDC_CMND_DOWNLOAD_FORCE 0x00010101 710 #define ZFCP_CFDC_CMND_FULL_ACCESS 0x00000201 711 #define ZFCP_CFDC_CMND_RESTRICTED_ACCESS 0x00000401 712 #define ZFCP_CFDC_CMND_UPLOAD 0x00010002 713 714 #define ZFCP_CFDC_DOWNLOAD 0x00000001 715 #define ZFCP_CFDC_UPLOAD 0x00000002 716 #define ZFCP_CFDC_WITH_CONTROL_FILE 0x00010000 717 718 #define ZFCP_CFDC_DEV_NAME "zfcp_cfdc" 719 #define ZFCP_CFDC_DEV_MAJOR MISC_MAJOR 720 #define ZFCP_CFDC_DEV_MINOR MISC_DYNAMIC_MINOR 721 722 #define ZFCP_CFDC_MAX_CONTROL_FILE_SIZE 127 * 1024 723 724 /************************* STRUCTURE DEFINITIONS *****************************/ 725 726 struct zfcp_fsf_req; 727 728 /* holds various memory pools of an adapter */ 729 struct zfcp_adapter_mempool { 730 mempool_t *fsf_req_erp; 731 mempool_t *fsf_req_scsi; 732 mempool_t *fsf_req_abort; 733 mempool_t *fsf_req_status_read; 734 mempool_t *data_status_read; 735 mempool_t *data_gid_pn; 736 }; 737 738 /* 739 * header for CT_IU 740 */ 741 struct ct_hdr { 742 u8 revision; // 0x01 743 u8 in_id[3]; // 0x00 744 u8 gs_type; // 0xFC Directory Service 745 u8 gs_subtype; // 0x02 Name Server 746 u8 options; // 0x00 single bidirectional exchange 747 u8 reserved0; 748 u16 cmd_rsp_code; // 0x0121 GID_PN, or 0x0100 GA_NXT 749 u16 max_res_size; // <= (4096 - 16) / 4 750 u8 reserved1; 751 u8 reason_code; 752 u8 reason_code_expl; 753 u8 vendor_unique; 754 } __attribute__ ((packed)); 755 756 /* nameserver request CT_IU -- for requests where 757 * a port name is required */ 758 struct ct_iu_gid_pn_req { 759 struct ct_hdr header; 760 wwn_t wwpn; 761 } __attribute__ ((packed)); 762 763 /* FS_ACC IU and data unit for GID_PN nameserver request */ 764 struct ct_iu_gid_pn_resp { 765 struct ct_hdr header; 766 u32 d_id; 767 } __attribute__ ((packed)); 768 769 typedef void (*zfcp_send_ct_handler_t)(unsigned long); 770 771 /** 772 * struct zfcp_send_ct - used to pass parameters to function zfcp_fsf_send_ct 773 * @port: port where the request is sent to 774 * @req: scatter-gather list for request 775 * @resp: scatter-gather list for response 776 * @req_count: number of elements in request scatter-gather list 777 * @resp_count: number of elements in response scatter-gather list 778 * @handler: handler function (called for response to the request) 779 * @handler_data: data passed to handler function 780 * @pool: pointer to memory pool for ct request structure 781 * @timeout: FSF timeout for this request 782 * @timer: timer (e.g. for request initiated by erp) 783 * @completion: completion for synchronization purposes 784 * @status: used to pass error status to calling function 785 */ 786 struct zfcp_send_ct { 787 struct zfcp_port *port; 788 struct scatterlist *req; 789 struct scatterlist *resp; 790 unsigned int req_count; 791 unsigned int resp_count; 792 zfcp_send_ct_handler_t handler; 793 unsigned long handler_data; 794 mempool_t *pool; 795 int timeout; 796 struct timer_list *timer; 797 struct completion *completion; 798 int status; 799 }; 800 801 /* used for name server requests in error recovery */ 802 struct zfcp_gid_pn_data { 803 struct zfcp_send_ct ct; 804 struct scatterlist req; 805 struct scatterlist resp; 806 struct ct_iu_gid_pn_req ct_iu_req; 807 struct ct_iu_gid_pn_resp ct_iu_resp; 808 struct zfcp_port *port; 809 }; 810 811 typedef void (*zfcp_send_els_handler_t)(unsigned long); 812 813 /** 814 * struct zfcp_send_els - used to pass parameters to function zfcp_fsf_send_els 815 * @adapter: adapter where request is sent from 816 * @port: port where ELS is destinated (port reference count has to be increased) 817 * @d_id: destiniation id of port where request is sent to 818 * @req: scatter-gather list for request 819 * @resp: scatter-gather list for response 820 * @req_count: number of elements in request scatter-gather list 821 * @resp_count: number of elements in response scatter-gather list 822 * @handler: handler function (called for response to the request) 823 * @handler_data: data passed to handler function 824 * @timer: timer (e.g. for request initiated by erp) 825 * @completion: completion for synchronization purposes 826 * @ls_code: hex code of ELS command 827 * @status: used to pass error status to calling function 828 */ 829 struct zfcp_send_els { 830 struct zfcp_adapter *adapter; 831 struct zfcp_port *port; 832 u32 d_id; 833 struct scatterlist *req; 834 struct scatterlist *resp; 835 unsigned int req_count; 836 unsigned int resp_count; 837 zfcp_send_els_handler_t handler; 838 unsigned long handler_data; 839 struct timer_list *timer; 840 struct completion *completion; 841 int ls_code; 842 int status; 843 }; 844 845 struct zfcp_qdio_queue { 846 struct qdio_buffer *buffer[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */ 847 u8 free_index; /* index of next free bfr 848 in queue (free_count>0) */ 849 atomic_t free_count; /* number of free buffers 850 in queue */ 851 rwlock_t queue_lock; /* lock for operations on queue */ 852 int distance_from_int; /* SBALs used since PCI indication 853 was last set */ 854 }; 855 856 struct zfcp_erp_action { 857 struct list_head list; 858 int action; /* requested action code */ 859 struct zfcp_adapter *adapter; /* device which should be recovered */ 860 struct zfcp_port *port; 861 struct zfcp_unit *unit; 862 volatile u32 status; /* recovery status */ 863 u32 step; /* active step of this erp action */ 864 struct zfcp_fsf_req *fsf_req; /* fsf request currently pending 865 for this action */ 866 struct timer_list timer; 867 }; 868 869 870 struct zfcp_adapter { 871 struct list_head list; /* list of adapters */ 872 atomic_t refcount; /* reference count */ 873 wait_queue_head_t remove_wq; /* can be used to wait for 874 refcount drop to zero */ 875 wwn_t peer_wwnn; /* P2P peer WWNN */ 876 wwn_t peer_wwpn; /* P2P peer WWPN */ 877 u32 peer_d_id; /* P2P peer D_ID */ 878 struct ccw_device *ccw_device; /* S/390 ccw device */ 879 u32 hydra_version; /* Hydra version */ 880 u32 fsf_lic_version; 881 u32 adapter_features; /* FCP channel features */ 882 u32 connection_features; /* host connection features */ 883 u32 hardware_version; /* of FCP channel */ 884 struct Scsi_Host *scsi_host; /* Pointer to mid-layer */ 885 struct list_head port_list_head; /* remote port list */ 886 struct list_head port_remove_lh; /* head of ports to be 887 removed */ 888 u32 ports; /* number of remote ports */ 889 struct timer_list scsi_er_timer; /* SCSI err recovery watch */ 890 atomic_t reqs_active; /* # active FSF reqs */ 891 unsigned long req_no; /* unique FSF req number */ 892 struct list_head *req_list; /* list of pending reqs */ 893 spinlock_t req_list_lock; /* request list lock */ 894 struct zfcp_qdio_queue request_queue; /* request queue */ 895 u32 fsf_req_seq_no; /* FSF cmnd seq number */ 896 wait_queue_head_t request_wq; /* can be used to wait for 897 more avaliable SBALs */ 898 struct zfcp_qdio_queue response_queue; /* response queue */ 899 rwlock_t abort_lock; /* Protects against SCSI 900 stack abort/command 901 completion races */ 902 u16 status_read_failed; /* # failed status reads */ 903 atomic_t status; /* status of this adapter */ 904 struct list_head erp_ready_head; /* error recovery for this 905 adapter/devices */ 906 struct list_head erp_running_head; 907 rwlock_t erp_lock; 908 struct semaphore erp_ready_sem; 909 wait_queue_head_t erp_thread_wqh; 910 wait_queue_head_t erp_done_wqh; 911 struct zfcp_erp_action erp_action; /* pending error recovery */ 912 atomic_t erp_counter; 913 u32 erp_total_count; /* total nr of enqueued erp 914 actions */ 915 u32 erp_low_mem_count; /* nr of erp actions waiting 916 for memory */ 917 struct zfcp_port *nameserver_port; /* adapter's nameserver */ 918 debug_info_t *erp_dbf; 919 debug_info_t *hba_dbf; 920 debug_info_t *san_dbf; /* debug feature areas */ 921 debug_info_t *scsi_dbf; 922 spinlock_t erp_dbf_lock; 923 spinlock_t hba_dbf_lock; 924 spinlock_t san_dbf_lock; 925 spinlock_t scsi_dbf_lock; 926 struct zfcp_erp_dbf_record erp_dbf_buf; 927 struct zfcp_hba_dbf_record hba_dbf_buf; 928 struct zfcp_san_dbf_record san_dbf_buf; 929 struct zfcp_scsi_dbf_record scsi_dbf_buf; 930 struct zfcp_adapter_mempool pool; /* Adapter memory pools */ 931 struct qdio_initialize qdio_init_data; /* for qdio_establish */ 932 struct device generic_services; /* directory for WKA ports */ 933 struct fc_host_statistics *fc_stats; 934 struct fsf_qtcb_bottom_port *stats_reset_data; 935 unsigned long stats_reset; 936 }; 937 938 /* 939 * the struct device sysfs_device must be at the beginning of this structure. 940 * pointer to struct device is used to free port structure in release function 941 * of the device. don't change! 942 */ 943 struct zfcp_port { 944 struct device sysfs_device; /* sysfs device */ 945 struct fc_rport *rport; /* rport of fc transport class */ 946 struct list_head list; /* list of remote ports */ 947 atomic_t refcount; /* reference count */ 948 wait_queue_head_t remove_wq; /* can be used to wait for 949 refcount drop to zero */ 950 struct zfcp_adapter *adapter; /* adapter used to access port */ 951 struct list_head unit_list_head; /* head of logical unit list */ 952 struct list_head unit_remove_lh; /* head of luns to be removed 953 list */ 954 u32 units; /* # of logical units in list */ 955 atomic_t status; /* status of this remote port */ 956 wwn_t wwnn; /* WWNN if known */ 957 wwn_t wwpn; /* WWPN */ 958 u32 d_id; /* D_ID */ 959 u32 handle; /* handle assigned by FSF */ 960 struct zfcp_erp_action erp_action; /* pending error recovery */ 961 atomic_t erp_counter; 962 u32 maxframe_size; 963 u32 supported_classes; 964 }; 965 966 /* the struct device sysfs_device must be at the beginning of this structure. 967 * pointer to struct device is used to free unit structure in release function 968 * of the device. don't change! 969 */ 970 struct zfcp_unit { 971 struct device sysfs_device; /* sysfs device */ 972 struct list_head list; /* list of logical units */ 973 atomic_t refcount; /* reference count */ 974 wait_queue_head_t remove_wq; /* can be used to wait for 975 refcount drop to zero */ 976 struct zfcp_port *port; /* remote port of unit */ 977 atomic_t status; /* status of this logical unit */ 978 unsigned int scsi_lun; /* own SCSI LUN */ 979 fcp_lun_t fcp_lun; /* own FCP_LUN */ 980 u32 handle; /* handle assigned by FSF */ 981 struct scsi_device *device; /* scsi device struct pointer */ 982 struct zfcp_erp_action erp_action; /* pending error recovery */ 983 atomic_t erp_counter; 984 }; 985 986 /* FSF request */ 987 struct zfcp_fsf_req { 988 struct list_head list; /* list of FSF requests */ 989 unsigned long req_id; /* unique request ID */ 990 struct zfcp_adapter *adapter; /* adapter request belongs to */ 991 u8 sbal_number; /* nr of SBALs free for use */ 992 u8 sbal_first; /* first SBAL for this request */ 993 u8 sbal_last; /* last possible SBAL for 994 this reuest */ 995 u8 sbal_curr; /* current SBAL during creation 996 of request */ 997 u8 sbale_curr; /* current SBALE during creation 998 of request */ 999 wait_queue_head_t completion_wq; /* can be used by a routine 1000 to wait for completion */ 1001 volatile u32 status; /* status of this request */ 1002 u32 fsf_command; /* FSF Command copy */ 1003 struct fsf_qtcb *qtcb; /* address of associated QTCB */ 1004 u32 seq_no; /* Sequence number of request */ 1005 unsigned long data; /* private data of request */ 1006 struct zfcp_erp_action *erp_action; /* used if this request is 1007 issued on behalf of erp */ 1008 mempool_t *pool; /* used if request was alloacted 1009 from emergency pool */ 1010 unsigned long long issued; /* request sent time (STCK) */ 1011 struct zfcp_unit *unit; 1012 }; 1013 1014 typedef void zfcp_fsf_req_handler_t(struct zfcp_fsf_req*); 1015 1016 /* driver data */ 1017 struct zfcp_data { 1018 struct scsi_host_template scsi_host_template; 1019 atomic_t status; /* Module status flags */ 1020 struct list_head adapter_list_head; /* head of adapter list */ 1021 struct list_head adapter_remove_lh; /* head of adapters to be 1022 removed */ 1023 u32 adapters; /* # of adapters in list */ 1024 rwlock_t config_lock; /* serialises changes 1025 to adapter/port/unit 1026 lists */ 1027 struct semaphore config_sema; /* serialises configuration 1028 changes */ 1029 atomic_t loglevel; /* current loglevel */ 1030 char init_busid[BUS_ID_SIZE]; 1031 wwn_t init_wwpn; 1032 fcp_lun_t init_fcp_lun; 1033 char *driver_version; 1034 }; 1035 1036 /** 1037 * struct zfcp_sg_list - struct describing a scatter-gather list 1038 * @sg: pointer to array of (struct scatterlist) 1039 * @count: number of elements in scatter-gather list 1040 */ 1041 struct zfcp_sg_list { 1042 struct scatterlist *sg; 1043 unsigned int count; 1044 }; 1045 1046 /* number of elements for various memory pools */ 1047 #define ZFCP_POOL_FSF_REQ_ERP_NR 1 1048 #define ZFCP_POOL_FSF_REQ_SCSI_NR 1 1049 #define ZFCP_POOL_FSF_REQ_ABORT_NR 1 1050 #define ZFCP_POOL_STATUS_READ_NR ZFCP_STATUS_READS_RECOM 1051 #define ZFCP_POOL_DATA_GID_PN_NR 1 1052 1053 /* struct used by memory pools for fsf_requests */ 1054 struct zfcp_fsf_req_pool_element { 1055 struct zfcp_fsf_req fsf_req; 1056 struct fsf_qtcb qtcb; 1057 }; 1058 1059 /********************** ZFCP SPECIFIC DEFINES ********************************/ 1060 1061 #define ZFCP_REQ_AUTO_CLEANUP 0x00000002 1062 #define ZFCP_WAIT_FOR_SBAL 0x00000004 1063 #define ZFCP_REQ_NO_QTCB 0x00000008 1064 1065 #define ZFCP_SET 0x00000100 1066 #define ZFCP_CLEAR 0x00000200 1067 1068 #ifndef atomic_test_mask 1069 #define atomic_test_mask(mask, target) \ 1070 ((atomic_read(target) & mask) == mask) 1071 #endif 1072 1073 extern void _zfcp_hex_dump(char *, int); 1074 #define ZFCP_HEX_DUMP(level, addr, count) \ 1075 if (ZFCP_LOG_CHECK(level)) { \ 1076 _zfcp_hex_dump(addr, count); \ 1077 } 1078 1079 #define zfcp_get_busid_by_adapter(adapter) (adapter->ccw_device->dev.bus_id) 1080 #define zfcp_get_busid_by_port(port) (zfcp_get_busid_by_adapter(port->adapter)) 1081 #define zfcp_get_busid_by_unit(unit) (zfcp_get_busid_by_port(unit->port)) 1082 1083 /* 1084 * functions needed for reference/usage counting 1085 */ 1086 1087 static inline void 1088 zfcp_unit_get(struct zfcp_unit *unit) 1089 { 1090 atomic_inc(&unit->refcount); 1091 } 1092 1093 static inline void 1094 zfcp_unit_put(struct zfcp_unit *unit) 1095 { 1096 if (atomic_dec_return(&unit->refcount) == 0) 1097 wake_up(&unit->remove_wq); 1098 } 1099 1100 static inline void 1101 zfcp_unit_wait(struct zfcp_unit *unit) 1102 { 1103 wait_event(unit->remove_wq, atomic_read(&unit->refcount) == 0); 1104 } 1105 1106 static inline void 1107 zfcp_port_get(struct zfcp_port *port) 1108 { 1109 atomic_inc(&port->refcount); 1110 } 1111 1112 static inline void 1113 zfcp_port_put(struct zfcp_port *port) 1114 { 1115 if (atomic_dec_return(&port->refcount) == 0) 1116 wake_up(&port->remove_wq); 1117 } 1118 1119 static inline void 1120 zfcp_port_wait(struct zfcp_port *port) 1121 { 1122 wait_event(port->remove_wq, atomic_read(&port->refcount) == 0); 1123 } 1124 1125 static inline void 1126 zfcp_adapter_get(struct zfcp_adapter *adapter) 1127 { 1128 atomic_inc(&adapter->refcount); 1129 } 1130 1131 static inline void 1132 zfcp_adapter_put(struct zfcp_adapter *adapter) 1133 { 1134 if (atomic_dec_return(&adapter->refcount) == 0) 1135 wake_up(&adapter->remove_wq); 1136 } 1137 1138 static inline void 1139 zfcp_adapter_wait(struct zfcp_adapter *adapter) 1140 { 1141 wait_event(adapter->remove_wq, atomic_read(&adapter->refcount) == 0); 1142 } 1143 1144 #endif /* ZFCP_DEF_H */ 1145