1 /* 2 * 3 * linux/drivers/s390/scsi/zfcp_def.h 4 * 5 * FCP adapter driver for IBM eServer zSeries 6 * 7 * (C) Copyright IBM Corp. 2002, 2004 8 * 9 * Author(s): Martin Peschke <mpeschke@de.ibm.com> 10 * Raimund Schroeder <raimund.schroeder@de.ibm.com> 11 * Aron Zeh 12 * Wolfgang Taphorn 13 * Stefan Bader <stefan.bader@de.ibm.com> 14 * Heiko Carstens <heiko.carstens@de.ibm.com> 15 * Andreas Herrmann <aherrman@de.ibm.com> 16 * Volker Sameske <sameske@de.ibm.com> 17 * 18 * This program is free software; you can redistribute it and/or modify 19 * it under the terms of the GNU General Public License as published by 20 * the Free Software Foundation; either version 2, or (at your option) 21 * any later version. 22 * 23 * This program is distributed in the hope that it will be useful, 24 * but WITHOUT ANY WARRANTY; without even the implied warranty of 25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 26 * GNU General Public License for more details. 27 * 28 * You should have received a copy of the GNU General Public License 29 * along with this program; if not, write to the Free Software 30 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 31 */ 32 33 34 #ifndef ZFCP_DEF_H 35 #define ZFCP_DEF_H 36 37 #define ZFCP_DEF_REVISION "$Revision: 1.111 $" 38 39 /*************************** INCLUDES *****************************************/ 40 41 #include <linux/init.h> 42 #include <linux/moduleparam.h> 43 #include <linux/miscdevice.h> 44 #include <linux/major.h> 45 #include <linux/blkdev.h> 46 #include <linux/delay.h> 47 #include <linux/timer.h> 48 #include <scsi/scsi.h> 49 #include <scsi/scsi_tcq.h> 50 #include <scsi/scsi_cmnd.h> 51 #include <scsi/scsi_device.h> 52 #include <scsi/scsi_host.h> 53 #include <scsi/scsi_transport.h> 54 #include <scsi/scsi_transport_fc.h> 55 #include "../../fc4/fc.h" 56 #include "zfcp_fsf.h" 57 #include <asm/ccwdev.h> 58 #include <asm/qdio.h> 59 #include <asm/debug.h> 60 #include <asm/ebcdic.h> 61 #include <linux/mempool.h> 62 #include <linux/syscalls.h> 63 #include <linux/ioctl.h> 64 #include <linux/ioctl32.h> 65 66 /************************ DEBUG FLAGS *****************************************/ 67 68 #define ZFCP_PRINT_FLAGS 69 70 /********************* GENERAL DEFINES *********************************/ 71 72 /* zfcp version number, it consists of major, minor, and patch-level number */ 73 #define ZFCP_VERSION "4.2.0" 74 75 /** 76 * zfcp_sg_to_address - determine kernel address from struct scatterlist 77 * @list: struct scatterlist 78 * Return: kernel address 79 */ 80 static inline void * 81 zfcp_sg_to_address(struct scatterlist *list) 82 { 83 return (void *) (page_address(list->page) + list->offset); 84 } 85 86 /** 87 * zfcp_address_to_sg - set up struct scatterlist from kernel address 88 * @address: kernel address 89 * @list: struct scatterlist 90 */ 91 static inline void 92 zfcp_address_to_sg(void *address, struct scatterlist *list) 93 { 94 list->page = virt_to_page(address); 95 list->offset = ((unsigned long) address) & (PAGE_SIZE - 1); 96 } 97 98 /********************* SCSI SPECIFIC DEFINES *********************************/ 99 100 /* 32 bit for SCSI ID and LUN as long as the SCSI stack uses this type */ 101 typedef u32 scsi_id_t; 102 typedef u32 scsi_lun_t; 103 104 #define ZFCP_ERP_SCSI_LOW_MEM_TIMEOUT (100*HZ) 105 #define ZFCP_SCSI_ER_TIMEOUT (100*HZ) 106 107 /********************* CIO/QDIO SPECIFIC DEFINES *****************************/ 108 109 /* Adapter Identification Parameters */ 110 #define ZFCP_CONTROL_UNIT_TYPE 0x1731 111 #define ZFCP_CONTROL_UNIT_MODEL 0x03 112 #define ZFCP_DEVICE_TYPE 0x1732 113 #define ZFCP_DEVICE_MODEL 0x03 114 #define ZFCP_DEVICE_MODEL_PRIV 0x04 115 116 /* allow as many chained SBALs as are supported by hardware */ 117 #define ZFCP_MAX_SBALS_PER_REQ FSF_MAX_SBALS_PER_REQ 118 #define ZFCP_MAX_SBALS_PER_CT_REQ FSF_MAX_SBALS_PER_REQ 119 #define ZFCP_MAX_SBALS_PER_ELS_REQ FSF_MAX_SBALS_PER_ELS_REQ 120 121 /* DMQ bug workaround: don't use last SBALE */ 122 #define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1) 123 124 /* index of last SBALE (with respect to DMQ bug workaround) */ 125 #define ZFCP_LAST_SBALE_PER_SBAL (ZFCP_MAX_SBALES_PER_SBAL - 1) 126 127 /* max. number of (data buffer) SBALEs in largest SBAL chain */ 128 #define ZFCP_MAX_SBALES_PER_REQ \ 129 (ZFCP_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2) 130 /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */ 131 132 /* FIXME(tune): free space should be one max. SBAL chain plus what? */ 133 #define ZFCP_QDIO_PCI_INTERVAL (QDIO_MAX_BUFFERS_PER_Q \ 134 - (ZFCP_MAX_SBALS_PER_REQ + 4)) 135 136 #define ZFCP_SBAL_TIMEOUT (5*HZ) 137 138 #define ZFCP_TYPE2_RECOVERY_TIME (8*HZ) 139 140 /* queue polling (values in microseconds) */ 141 #define ZFCP_MAX_INPUT_THRESHOLD 5000 /* FIXME: tune */ 142 #define ZFCP_MAX_OUTPUT_THRESHOLD 1000 /* FIXME: tune */ 143 #define ZFCP_MIN_INPUT_THRESHOLD 1 /* ignored by QDIO layer */ 144 #define ZFCP_MIN_OUTPUT_THRESHOLD 1 /* ignored by QDIO layer */ 145 146 #define QDIO_SCSI_QFMT 1 /* 1 for FSF */ 147 148 /********************* FSF SPECIFIC DEFINES *********************************/ 149 150 #define ZFCP_ULP_INFO_VERSION 26 151 #define ZFCP_QTCB_VERSION FSF_QTCB_CURRENT_VERSION 152 /* ATTENTION: value must not be used by hardware */ 153 #define FSF_QTCB_UNSOLICITED_STATUS 0x6305 154 #define ZFCP_STATUS_READ_FAILED_THRESHOLD 3 155 #define ZFCP_STATUS_READS_RECOM FSF_STATUS_READS_RECOM 156 #define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES 6 157 #define ZFCP_EXCHANGE_CONFIG_DATA_SLEEP 50 158 159 /* timeout value for "default timer" for fsf requests */ 160 #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ); 161 162 /*************** FIBRE CHANNEL PROTOCOL SPECIFIC DEFINES ********************/ 163 164 typedef unsigned long long wwn_t; 165 typedef unsigned int fc_id_t; 166 typedef unsigned long long fcp_lun_t; 167 /* data length field may be at variable position in FCP-2 FCP_CMND IU */ 168 typedef unsigned int fcp_dl_t; 169 170 #define ZFCP_FC_SERVICE_CLASS_DEFAULT FSF_CLASS_3 171 172 /* timeout for name-server lookup (in seconds) */ 173 #define ZFCP_NS_GID_PN_TIMEOUT 10 174 175 /* largest SCSI command we can process */ 176 /* FCP-2 (FCP_CMND IU) allows up to (255-3+16) */ 177 #define ZFCP_MAX_SCSI_CMND_LENGTH 255 178 /* maximum number of commands in LUN queue (tagged queueing) */ 179 #define ZFCP_CMND_PER_LUN 32 180 181 /* task attribute values in FCP-2 FCP_CMND IU */ 182 #define SIMPLE_Q 0 183 #define HEAD_OF_Q 1 184 #define ORDERED_Q 2 185 #define ACA_Q 4 186 #define UNTAGGED 5 187 188 /* task management flags in FCP-2 FCP_CMND IU */ 189 #define FCP_CLEAR_ACA 0x40 190 #define FCP_TARGET_RESET 0x20 191 #define FCP_LOGICAL_UNIT_RESET 0x10 192 #define FCP_CLEAR_TASK_SET 0x04 193 #define FCP_ABORT_TASK_SET 0x02 194 195 #define FCP_CDB_LENGTH 16 196 197 #define ZFCP_DID_MASK 0x00FFFFFF 198 199 /* FCP(-2) FCP_CMND IU */ 200 struct fcp_cmnd_iu { 201 fcp_lun_t fcp_lun; /* FCP logical unit number */ 202 u8 crn; /* command reference number */ 203 u8 reserved0:5; /* reserved */ 204 u8 task_attribute:3; /* task attribute */ 205 u8 task_management_flags; /* task management flags */ 206 u8 add_fcp_cdb_length:6; /* additional FCP_CDB length */ 207 u8 rddata:1; /* read data */ 208 u8 wddata:1; /* write data */ 209 u8 fcp_cdb[FCP_CDB_LENGTH]; 210 } __attribute__((packed)); 211 212 /* FCP(-2) FCP_RSP IU */ 213 struct fcp_rsp_iu { 214 u8 reserved0[10]; 215 union { 216 struct { 217 u8 reserved1:3; 218 u8 fcp_conf_req:1; 219 u8 fcp_resid_under:1; 220 u8 fcp_resid_over:1; 221 u8 fcp_sns_len_valid:1; 222 u8 fcp_rsp_len_valid:1; 223 } bits; 224 u8 value; 225 } validity; 226 u8 scsi_status; 227 u32 fcp_resid; 228 u32 fcp_sns_len; 229 u32 fcp_rsp_len; 230 } __attribute__((packed)); 231 232 233 #define RSP_CODE_GOOD 0 234 #define RSP_CODE_LENGTH_MISMATCH 1 235 #define RSP_CODE_FIELD_INVALID 2 236 #define RSP_CODE_RO_MISMATCH 3 237 #define RSP_CODE_TASKMAN_UNSUPP 4 238 #define RSP_CODE_TASKMAN_FAILED 5 239 240 /* see fc-fs */ 241 #define LS_FAN 0x60000000 242 #define LS_RSCN 0x61040000 243 244 struct fcp_rscn_head { 245 u8 command; 246 u8 page_length; /* always 0x04 */ 247 u16 payload_len; 248 } __attribute__((packed)); 249 250 struct fcp_rscn_element { 251 u8 reserved:2; 252 u8 event_qual:4; 253 u8 addr_format:2; 254 u32 nport_did:24; 255 } __attribute__((packed)); 256 257 #define ZFCP_PORT_ADDRESS 0x0 258 #define ZFCP_AREA_ADDRESS 0x1 259 #define ZFCP_DOMAIN_ADDRESS 0x2 260 #define ZFCP_FABRIC_ADDRESS 0x3 261 262 #define ZFCP_PORTS_RANGE_PORT 0xFFFFFF 263 #define ZFCP_PORTS_RANGE_AREA 0xFFFF00 264 #define ZFCP_PORTS_RANGE_DOMAIN 0xFF0000 265 #define ZFCP_PORTS_RANGE_FABRIC 0x000000 266 267 #define ZFCP_NO_PORTS_PER_AREA 0x100 268 #define ZFCP_NO_PORTS_PER_DOMAIN 0x10000 269 #define ZFCP_NO_PORTS_PER_FABRIC 0x1000000 270 271 struct fcp_fan { 272 u32 command; 273 u32 fport_did; 274 wwn_t fport_wwpn; 275 wwn_t fport_wwname; 276 } __attribute__((packed)); 277 278 /* see fc-ph */ 279 struct fcp_logo { 280 u32 command; 281 u32 nport_did; 282 wwn_t nport_wwpn; 283 } __attribute__((packed)); 284 285 /* 286 * FC-FS stuff 287 */ 288 #define R_A_TOV 10 /* seconds */ 289 #define ZFCP_ELS_TIMEOUT (2 * R_A_TOV) 290 291 #define ZFCP_LS_RLS 0x0f 292 #define ZFCP_LS_ADISC 0x52 293 #define ZFCP_LS_RPS 0x56 294 #define ZFCP_LS_RSCN 0x61 295 #define ZFCP_LS_RNID 0x78 296 297 struct zfcp_ls_rjt_par { 298 u8 action; 299 u8 reason_code; 300 u8 reason_expl; 301 u8 vendor_unique; 302 } __attribute__ ((packed)); 303 304 struct zfcp_ls_adisc { 305 u8 code; 306 u8 field[3]; 307 u32 hard_nport_id; 308 u64 wwpn; 309 u64 wwnn; 310 u32 nport_id; 311 } __attribute__ ((packed)); 312 313 struct zfcp_ls_adisc_acc { 314 u8 code; 315 u8 field[3]; 316 u32 hard_nport_id; 317 u64 wwpn; 318 u64 wwnn; 319 u32 nport_id; 320 } __attribute__ ((packed)); 321 322 struct zfcp_rc_entry { 323 u8 code; 324 const char *description; 325 }; 326 327 /* 328 * FC-GS-2 stuff 329 */ 330 #define ZFCP_CT_REVISION 0x01 331 #define ZFCP_CT_DIRECTORY_SERVICE 0xFC 332 #define ZFCP_CT_NAME_SERVER 0x02 333 #define ZFCP_CT_SYNCHRONOUS 0x00 334 #define ZFCP_CT_GID_PN 0x0121 335 #define ZFCP_CT_MAX_SIZE 0x1020 336 #define ZFCP_CT_ACCEPT 0x8002 337 #define ZFCP_CT_REJECT 0x8001 338 339 /* 340 * FC-GS-4 stuff 341 */ 342 #define ZFCP_CT_TIMEOUT (3 * R_A_TOV) 343 344 345 /***************** S390 DEBUG FEATURE SPECIFIC DEFINES ***********************/ 346 347 /* debug feature entries per adapter */ 348 #define ZFCP_ERP_DBF_INDEX 1 349 #define ZFCP_ERP_DBF_AREAS 2 350 #define ZFCP_ERP_DBF_LENGTH 16 351 #define ZFCP_ERP_DBF_LEVEL 3 352 #define ZFCP_ERP_DBF_NAME "zfcperp" 353 354 #define ZFCP_CMD_DBF_INDEX 2 355 #define ZFCP_CMD_DBF_AREAS 1 356 #define ZFCP_CMD_DBF_LENGTH 8 357 #define ZFCP_CMD_DBF_LEVEL 3 358 #define ZFCP_CMD_DBF_NAME "zfcpcmd" 359 360 #define ZFCP_ABORT_DBF_INDEX 2 361 #define ZFCP_ABORT_DBF_AREAS 1 362 #define ZFCP_ABORT_DBF_LENGTH 8 363 #define ZFCP_ABORT_DBF_LEVEL 6 364 #define ZFCP_ABORT_DBF_NAME "zfcpabt" 365 366 #define ZFCP_IN_ELS_DBF_INDEX 2 367 #define ZFCP_IN_ELS_DBF_AREAS 1 368 #define ZFCP_IN_ELS_DBF_LENGTH 8 369 #define ZFCP_IN_ELS_DBF_LEVEL 6 370 #define ZFCP_IN_ELS_DBF_NAME "zfcpels" 371 372 /******************** LOGGING MACROS AND DEFINES *****************************/ 373 374 /* 375 * Logging may be applied on certain kinds of driver operations 376 * independently. Additionally, different log-levels are supported for 377 * each of these areas. 378 */ 379 380 #define ZFCP_NAME "zfcp" 381 382 /* read-only LUN sharing switch initial value */ 383 #define ZFCP_RO_LUN_SHARING_DEFAULTS 0 384 385 /* independent log areas */ 386 #define ZFCP_LOG_AREA_OTHER 0 387 #define ZFCP_LOG_AREA_SCSI 1 388 #define ZFCP_LOG_AREA_FSF 2 389 #define ZFCP_LOG_AREA_CONFIG 3 390 #define ZFCP_LOG_AREA_CIO 4 391 #define ZFCP_LOG_AREA_QDIO 5 392 #define ZFCP_LOG_AREA_ERP 6 393 #define ZFCP_LOG_AREA_FC 7 394 395 /* log level values*/ 396 #define ZFCP_LOG_LEVEL_NORMAL 0 397 #define ZFCP_LOG_LEVEL_INFO 1 398 #define ZFCP_LOG_LEVEL_DEBUG 2 399 #define ZFCP_LOG_LEVEL_TRACE 3 400 401 /* 402 * this allows removal of logging code by the preprocessor 403 * (the most detailed log level still to be compiled in is specified, 404 * higher log levels are removed) 405 */ 406 #define ZFCP_LOG_LEVEL_LIMIT ZFCP_LOG_LEVEL_TRACE 407 408 /* get "loglevel" nibble assignment */ 409 #define ZFCP_GET_LOG_VALUE(zfcp_lognibble) \ 410 ((atomic_read(&zfcp_data.loglevel) >> (zfcp_lognibble<<2)) & 0xF) 411 412 /* set "loglevel" nibble */ 413 #define ZFCP_SET_LOG_NIBBLE(value, zfcp_lognibble) \ 414 (value << (zfcp_lognibble << 2)) 415 416 /* all log-level defaults are combined to generate initial log-level */ 417 #define ZFCP_LOG_LEVEL_DEFAULTS \ 418 (ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_OTHER) | \ 419 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_SCSI) | \ 420 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FSF) | \ 421 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CONFIG) | \ 422 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CIO) | \ 423 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_QDIO) | \ 424 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_ERP) | \ 425 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FC)) 426 427 /* check whether we have the right level for logging */ 428 #define ZFCP_LOG_CHECK(level) \ 429 ((ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA)) >= level) 430 431 /* logging routine for zfcp */ 432 #define _ZFCP_LOG(fmt, args...) \ 433 printk(KERN_ERR ZFCP_NAME": %s(%d): " fmt, __FUNCTION__, \ 434 __LINE__ , ##args) 435 436 #define ZFCP_LOG(level, fmt, args...) \ 437 do { \ 438 if (ZFCP_LOG_CHECK(level)) \ 439 _ZFCP_LOG(fmt, ##args); \ 440 } while (0) 441 442 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_NORMAL 443 # define ZFCP_LOG_NORMAL(fmt, args...) 444 #else 445 # define ZFCP_LOG_NORMAL(fmt, args...) \ 446 do { \ 447 if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_NORMAL)) \ 448 printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \ 449 } while (0) 450 #endif 451 452 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_INFO 453 # define ZFCP_LOG_INFO(fmt, args...) 454 #else 455 # define ZFCP_LOG_INFO(fmt, args...) \ 456 do { \ 457 if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_INFO)) \ 458 printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \ 459 } while (0) 460 #endif 461 462 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_DEBUG 463 # define ZFCP_LOG_DEBUG(fmt, args...) 464 #else 465 # define ZFCP_LOG_DEBUG(fmt, args...) \ 466 ZFCP_LOG(ZFCP_LOG_LEVEL_DEBUG, fmt , ##args) 467 #endif 468 469 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_TRACE 470 # define ZFCP_LOG_TRACE(fmt, args...) 471 #else 472 # define ZFCP_LOG_TRACE(fmt, args...) \ 473 ZFCP_LOG(ZFCP_LOG_LEVEL_TRACE, fmt , ##args) 474 #endif 475 476 #ifndef ZFCP_PRINT_FLAGS 477 # define ZFCP_LOG_FLAGS(level, fmt, args...) 478 #else 479 extern u32 flags_dump; 480 # define ZFCP_LOG_FLAGS(level, fmt, args...) \ 481 do { \ 482 if (level <= flags_dump) \ 483 _ZFCP_LOG(fmt, ##args); \ 484 } while (0) 485 #endif 486 487 /*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/ 488 489 /* 490 * Note, the leftmost status byte is common among adapter, port 491 * and unit 492 */ 493 #define ZFCP_COMMON_FLAGS 0xfff00000 494 #define ZFCP_SPECIFIC_FLAGS 0x000fffff 495 496 /* common status bits */ 497 #define ZFCP_STATUS_COMMON_REMOVE 0x80000000 498 #define ZFCP_STATUS_COMMON_RUNNING 0x40000000 499 #define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000 500 #define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000 501 #define ZFCP_STATUS_COMMON_OPENING 0x08000000 502 #define ZFCP_STATUS_COMMON_OPEN 0x04000000 503 #define ZFCP_STATUS_COMMON_CLOSING 0x02000000 504 #define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000 505 #define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000 506 507 /* adapter status */ 508 #define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002 509 #define ZFCP_STATUS_ADAPTER_REGISTERED 0x00000004 510 #define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008 511 #define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010 512 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_UP 0x00000020 513 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL 0x00000080 514 #define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100 515 #define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200 516 517 #define ZFCP_STATUS_ADAPTER_SCSI_UP \ 518 (ZFCP_STATUS_COMMON_UNBLOCKED | \ 519 ZFCP_STATUS_ADAPTER_REGISTERED) 520 521 522 /* FC-PH/FC-GS well-known address identifiers for generic services */ 523 #define ZFCP_DID_MANAGEMENT_SERVICE 0xFFFFFA 524 #define ZFCP_DID_TIME_SERVICE 0xFFFFFB 525 #define ZFCP_DID_DIRECTORY_SERVICE 0xFFFFFC 526 #define ZFCP_DID_ALIAS_SERVICE 0xFFFFF8 527 #define ZFCP_DID_KEY_DISTRIBUTION_SERVICE 0xFFFFF7 528 529 /* remote port status */ 530 #define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001 531 #define ZFCP_STATUS_PORT_DID_DID 0x00000002 532 #define ZFCP_STATUS_PORT_PHYS_CLOSING 0x00000004 533 #define ZFCP_STATUS_PORT_NO_WWPN 0x00000008 534 #define ZFCP_STATUS_PORT_NO_SCSI_ID 0x00000010 535 #define ZFCP_STATUS_PORT_INVALID_WWPN 0x00000020 536 #define ZFCP_STATUS_PORT_ACCESS_DENIED 0x00000040 537 538 /* for ports with well known addresses */ 539 #define ZFCP_STATUS_PORT_WKA \ 540 (ZFCP_STATUS_PORT_NO_WWPN | \ 541 ZFCP_STATUS_PORT_NO_SCSI_ID) 542 543 /* logical unit status */ 544 #define ZFCP_STATUS_UNIT_NOTSUPPUNITRESET 0x00000001 545 #define ZFCP_STATUS_UNIT_TEMPORARY 0x00000002 546 #define ZFCP_STATUS_UNIT_SHARED 0x00000004 547 #define ZFCP_STATUS_UNIT_READONLY 0x00000008 548 549 /* FSF request status (this does not have a common part) */ 550 #define ZFCP_STATUS_FSFREQ_NOT_INIT 0x00000000 551 #define ZFCP_STATUS_FSFREQ_POOL 0x00000001 552 #define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT 0x00000002 553 #define ZFCP_STATUS_FSFREQ_COMPLETED 0x00000004 554 #define ZFCP_STATUS_FSFREQ_ERROR 0x00000008 555 #define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010 556 #define ZFCP_STATUS_FSFREQ_ABORTING 0x00000020 557 #define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040 558 #define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080 559 #define ZFCP_STATUS_FSFREQ_ABORTED 0x00000100 560 #define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200 561 #define ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP 0x00000400 562 #define ZFCP_STATUS_FSFREQ_RETRY 0x00000800 563 #define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000 564 565 /*********************** ERROR RECOVERY PROCEDURE DEFINES ********************/ 566 567 #define ZFCP_MAX_ERPS 3 568 569 #define ZFCP_ERP_FSFREQ_TIMEOUT (30 * HZ) 570 #define ZFCP_ERP_MEMWAIT_TIMEOUT HZ 571 572 #define ZFCP_STATUS_ERP_TIMEDOUT 0x10000000 573 #define ZFCP_STATUS_ERP_CLOSE_ONLY 0x01000000 574 #define ZFCP_STATUS_ERP_DISMISSING 0x00100000 575 #define ZFCP_STATUS_ERP_DISMISSED 0x00200000 576 #define ZFCP_STATUS_ERP_LOWMEM 0x00400000 577 578 #define ZFCP_ERP_STEP_UNINITIALIZED 0x00000000 579 #define ZFCP_ERP_STEP_FSF_XCONFIG 0x00000001 580 #define ZFCP_ERP_STEP_PHYS_PORT_CLOSING 0x00000010 581 #define ZFCP_ERP_STEP_PORT_CLOSING 0x00000100 582 #define ZFCP_ERP_STEP_NAMESERVER_OPEN 0x00000200 583 #define ZFCP_ERP_STEP_NAMESERVER_LOOKUP 0x00000400 584 #define ZFCP_ERP_STEP_PORT_OPENING 0x00000800 585 #define ZFCP_ERP_STEP_UNIT_CLOSING 0x00001000 586 #define ZFCP_ERP_STEP_UNIT_OPENING 0x00002000 587 588 /* Ordered by escalation level (necessary for proper erp-code operation) */ 589 #define ZFCP_ERP_ACTION_REOPEN_ADAPTER 0x4 590 #define ZFCP_ERP_ACTION_REOPEN_PORT_FORCED 0x3 591 #define ZFCP_ERP_ACTION_REOPEN_PORT 0x2 592 #define ZFCP_ERP_ACTION_REOPEN_UNIT 0x1 593 594 #define ZFCP_ERP_ACTION_RUNNING 0x1 595 #define ZFCP_ERP_ACTION_READY 0x2 596 597 #define ZFCP_ERP_SUCCEEDED 0x0 598 #define ZFCP_ERP_FAILED 0x1 599 #define ZFCP_ERP_CONTINUES 0x2 600 #define ZFCP_ERP_EXIT 0x3 601 #define ZFCP_ERP_DISMISSED 0x4 602 #define ZFCP_ERP_NOMEM 0x5 603 604 605 /******************** CFDC SPECIFIC STUFF *****************************/ 606 607 /* Firewall data channel sense data record */ 608 struct zfcp_cfdc_sense_data { 609 u32 signature; /* Request signature */ 610 u32 devno; /* FCP adapter device number */ 611 u32 command; /* Command code */ 612 u32 fsf_status; /* FSF request status and status qualifier */ 613 u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE]; 614 u8 payloads[256]; /* Access conflicts list */ 615 u8 control_file[0]; /* Access control table */ 616 }; 617 618 #define ZFCP_CFDC_SIGNATURE 0xCFDCACDF 619 620 #define ZFCP_CFDC_CMND_DOWNLOAD_NORMAL 0x00010001 621 #define ZFCP_CFDC_CMND_DOWNLOAD_FORCE 0x00010101 622 #define ZFCP_CFDC_CMND_FULL_ACCESS 0x00000201 623 #define ZFCP_CFDC_CMND_RESTRICTED_ACCESS 0x00000401 624 #define ZFCP_CFDC_CMND_UPLOAD 0x00010002 625 626 #define ZFCP_CFDC_DOWNLOAD 0x00000001 627 #define ZFCP_CFDC_UPLOAD 0x00000002 628 #define ZFCP_CFDC_WITH_CONTROL_FILE 0x00010000 629 630 #define ZFCP_CFDC_DEV_NAME "zfcp_cfdc" 631 #define ZFCP_CFDC_DEV_MAJOR MISC_MAJOR 632 #define ZFCP_CFDC_DEV_MINOR MISC_DYNAMIC_MINOR 633 634 #define ZFCP_CFDC_MAX_CONTROL_FILE_SIZE 127 * 1024 635 636 /************************* STRUCTURE DEFINITIONS *****************************/ 637 638 struct zfcp_fsf_req; 639 640 /* holds various memory pools of an adapter */ 641 struct zfcp_adapter_mempool { 642 mempool_t *fsf_req_erp; 643 mempool_t *fsf_req_scsi; 644 mempool_t *fsf_req_abort; 645 mempool_t *fsf_req_status_read; 646 mempool_t *data_status_read; 647 mempool_t *data_gid_pn; 648 }; 649 650 struct zfcp_exchange_config_data{ 651 }; 652 653 struct zfcp_open_port { 654 struct zfcp_port *port; 655 }; 656 657 struct zfcp_close_port { 658 struct zfcp_port *port; 659 }; 660 661 struct zfcp_open_unit { 662 struct zfcp_unit *unit; 663 }; 664 665 struct zfcp_close_unit { 666 struct zfcp_unit *unit; 667 }; 668 669 struct zfcp_close_physical_port { 670 struct zfcp_port *port; 671 }; 672 673 struct zfcp_send_fcp_command_task { 674 struct zfcp_fsf_req *fsf_req; 675 struct zfcp_unit *unit; 676 struct scsi_cmnd *scsi_cmnd; 677 unsigned long start_jiffies; 678 }; 679 680 struct zfcp_send_fcp_command_task_management { 681 struct zfcp_unit *unit; 682 }; 683 684 struct zfcp_abort_fcp_command { 685 struct zfcp_fsf_req *fsf_req; 686 struct zfcp_unit *unit; 687 }; 688 689 /* 690 * header for CT_IU 691 */ 692 struct ct_hdr { 693 u8 revision; // 0x01 694 u8 in_id[3]; // 0x00 695 u8 gs_type; // 0xFC Directory Service 696 u8 gs_subtype; // 0x02 Name Server 697 u8 options; // 0x00 single bidirectional exchange 698 u8 reserved0; 699 u16 cmd_rsp_code; // 0x0121 GID_PN, or 0x0100 GA_NXT 700 u16 max_res_size; // <= (4096 - 16) / 4 701 u8 reserved1; 702 u8 reason_code; 703 u8 reason_code_expl; 704 u8 vendor_unique; 705 } __attribute__ ((packed)); 706 707 /* nameserver request CT_IU -- for requests where 708 * a port name is required */ 709 struct ct_iu_gid_pn_req { 710 struct ct_hdr header; 711 wwn_t wwpn; 712 } __attribute__ ((packed)); 713 714 /* FS_ACC IU and data unit for GID_PN nameserver request */ 715 struct ct_iu_gid_pn_resp { 716 struct ct_hdr header; 717 fc_id_t d_id; 718 } __attribute__ ((packed)); 719 720 typedef void (*zfcp_send_ct_handler_t)(unsigned long); 721 722 /** 723 * struct zfcp_send_ct - used to pass parameters to function zfcp_fsf_send_ct 724 * @port: port where the request is sent to 725 * @req: scatter-gather list for request 726 * @resp: scatter-gather list for response 727 * @req_count: number of elements in request scatter-gather list 728 * @resp_count: number of elements in response scatter-gather list 729 * @handler: handler function (called for response to the request) 730 * @handler_data: data passed to handler function 731 * @pool: pointer to memory pool for ct request structure 732 * @timeout: FSF timeout for this request 733 * @timer: timer (e.g. for request initiated by erp) 734 * @completion: completion for synchronization purposes 735 * @status: used to pass error status to calling function 736 */ 737 struct zfcp_send_ct { 738 struct zfcp_port *port; 739 struct scatterlist *req; 740 struct scatterlist *resp; 741 unsigned int req_count; 742 unsigned int resp_count; 743 zfcp_send_ct_handler_t handler; 744 unsigned long handler_data; 745 mempool_t *pool; 746 int timeout; 747 struct timer_list *timer; 748 struct completion *completion; 749 int status; 750 }; 751 752 /* used for name server requests in error recovery */ 753 struct zfcp_gid_pn_data { 754 struct zfcp_send_ct ct; 755 struct scatterlist req; 756 struct scatterlist resp; 757 struct ct_iu_gid_pn_req ct_iu_req; 758 struct ct_iu_gid_pn_resp ct_iu_resp; 759 struct zfcp_port *port; 760 }; 761 762 typedef void (*zfcp_send_els_handler_t)(unsigned long); 763 764 /** 765 * struct zfcp_send_els - used to pass parameters to function zfcp_fsf_send_els 766 * @adapter: adapter where request is sent from 767 * @d_id: destiniation id of port where request is sent to 768 * @req: scatter-gather list for request 769 * @resp: scatter-gather list for response 770 * @req_count: number of elements in request scatter-gather list 771 * @resp_count: number of elements in response scatter-gather list 772 * @handler: handler function (called for response to the request) 773 * @handler_data: data passed to handler function 774 * @timer: timer (e.g. for request initiated by erp) 775 * @completion: completion for synchronization purposes 776 * @ls_code: hex code of ELS command 777 * @status: used to pass error status to calling function 778 */ 779 struct zfcp_send_els { 780 struct zfcp_adapter *adapter; 781 fc_id_t d_id; 782 struct scatterlist *req; 783 struct scatterlist *resp; 784 unsigned int req_count; 785 unsigned int resp_count; 786 zfcp_send_els_handler_t handler; 787 unsigned long handler_data; 788 struct timer_list *timer; 789 struct completion *completion; 790 int ls_code; 791 int status; 792 }; 793 794 struct zfcp_status_read { 795 struct fsf_status_read_buffer *buffer; 796 }; 797 798 struct zfcp_fsf_done { 799 struct completion *complete; 800 int status; 801 }; 802 803 /* request specific data */ 804 union zfcp_req_data { 805 struct zfcp_exchange_config_data exchange_config_data; 806 struct zfcp_open_port open_port; 807 struct zfcp_close_port close_port; 808 struct zfcp_open_unit open_unit; 809 struct zfcp_close_unit close_unit; 810 struct zfcp_close_physical_port close_physical_port; 811 struct zfcp_send_fcp_command_task send_fcp_command_task; 812 struct zfcp_send_fcp_command_task_management 813 send_fcp_command_task_management; 814 struct zfcp_abort_fcp_command abort_fcp_command; 815 struct zfcp_send_ct *send_ct; 816 struct zfcp_send_els *send_els; 817 struct zfcp_status_read status_read; 818 struct fsf_qtcb_bottom_port *port_data; 819 }; 820 821 struct zfcp_qdio_queue { 822 struct qdio_buffer *buffer[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */ 823 u8 free_index; /* index of next free bfr 824 in queue (free_count>0) */ 825 atomic_t free_count; /* number of free buffers 826 in queue */ 827 rwlock_t queue_lock; /* lock for operations on queue */ 828 int distance_from_int; /* SBALs used since PCI indication 829 was last set */ 830 }; 831 832 struct zfcp_erp_action { 833 struct list_head list; 834 int action; /* requested action code */ 835 struct zfcp_adapter *adapter; /* device which should be recovered */ 836 struct zfcp_port *port; 837 struct zfcp_unit *unit; 838 volatile u32 status; /* recovery status */ 839 u32 step; /* active step of this erp action */ 840 struct zfcp_fsf_req *fsf_req; /* fsf request currently pending 841 for this action */ 842 struct timer_list timer; 843 }; 844 845 846 struct zfcp_adapter { 847 struct list_head list; /* list of adapters */ 848 atomic_t refcount; /* reference count */ 849 wait_queue_head_t remove_wq; /* can be used to wait for 850 refcount drop to zero */ 851 wwn_t wwnn; /* WWNN */ 852 wwn_t wwpn; /* WWPN */ 853 fc_id_t s_id; /* N_Port ID */ 854 struct ccw_device *ccw_device; /* S/390 ccw device */ 855 u8 fc_service_class; 856 u32 fc_topology; /* FC topology */ 857 u32 fc_link_speed; /* FC interface speed */ 858 u32 hydra_version; /* Hydra version */ 859 u32 fsf_lic_version; 860 u32 supported_features;/* of FCP channel */ 861 u32 hardware_version; /* of FCP channel */ 862 u8 serial_number[32]; /* of hardware */ 863 struct Scsi_Host *scsi_host; /* Pointer to mid-layer */ 864 unsigned short scsi_host_no; /* Assigned host number */ 865 unsigned char name[9]; 866 struct list_head port_list_head; /* remote port list */ 867 struct list_head port_remove_lh; /* head of ports to be 868 removed */ 869 u32 ports; /* number of remote ports */ 870 struct timer_list scsi_er_timer; /* SCSI err recovery watch */ 871 struct list_head fsf_req_list_head; /* head of FSF req list */ 872 rwlock_t fsf_req_list_lock; /* lock for ops on list of 873 FSF requests */ 874 atomic_t fsf_reqs_active; /* # active FSF reqs */ 875 struct zfcp_qdio_queue request_queue; /* request queue */ 876 u32 fsf_req_seq_no; /* FSF cmnd seq number */ 877 wait_queue_head_t request_wq; /* can be used to wait for 878 more avaliable SBALs */ 879 struct zfcp_qdio_queue response_queue; /* response queue */ 880 rwlock_t abort_lock; /* Protects against SCSI 881 stack abort/command 882 completion races */ 883 u16 status_read_failed; /* # failed status reads */ 884 atomic_t status; /* status of this adapter */ 885 struct list_head erp_ready_head; /* error recovery for this 886 adapter/devices */ 887 struct list_head erp_running_head; 888 rwlock_t erp_lock; 889 struct semaphore erp_ready_sem; 890 wait_queue_head_t erp_thread_wqh; 891 wait_queue_head_t erp_done_wqh; 892 struct zfcp_erp_action erp_action; /* pending error recovery */ 893 atomic_t erp_counter; 894 u32 erp_total_count; /* total nr of enqueued erp 895 actions */ 896 u32 erp_low_mem_count; /* nr of erp actions waiting 897 for memory */ 898 struct zfcp_port *nameserver_port; /* adapter's nameserver */ 899 debug_info_t *erp_dbf; /* S/390 debug features */ 900 debug_info_t *abort_dbf; 901 debug_info_t *in_els_dbf; 902 debug_info_t *cmd_dbf; 903 spinlock_t dbf_lock; 904 struct zfcp_adapter_mempool pool; /* Adapter memory pools */ 905 struct qdio_initialize qdio_init_data; /* for qdio_establish */ 906 struct device generic_services; /* directory for WKA ports */ 907 }; 908 909 /* 910 * the struct device sysfs_device must be at the beginning of this structure. 911 * pointer to struct device is used to free port structure in release function 912 * of the device. don't change! 913 */ 914 struct zfcp_port { 915 struct device sysfs_device; /* sysfs device */ 916 struct list_head list; /* list of remote ports */ 917 atomic_t refcount; /* reference count */ 918 wait_queue_head_t remove_wq; /* can be used to wait for 919 refcount drop to zero */ 920 struct zfcp_adapter *adapter; /* adapter used to access port */ 921 struct list_head unit_list_head; /* head of logical unit list */ 922 struct list_head unit_remove_lh; /* head of luns to be removed 923 list */ 924 u32 units; /* # of logical units in list */ 925 atomic_t status; /* status of this remote port */ 926 scsi_id_t scsi_id; /* own SCSI ID */ 927 wwn_t wwnn; /* WWNN if known */ 928 wwn_t wwpn; /* WWPN */ 929 fc_id_t d_id; /* D_ID */ 930 u32 handle; /* handle assigned by FSF */ 931 struct zfcp_erp_action erp_action; /* pending error recovery */ 932 atomic_t erp_counter; 933 }; 934 935 /* the struct device sysfs_device must be at the beginning of this structure. 936 * pointer to struct device is used to free unit structure in release function 937 * of the device. don't change! 938 */ 939 struct zfcp_unit { 940 struct device sysfs_device; /* sysfs device */ 941 struct list_head list; /* list of logical units */ 942 atomic_t refcount; /* reference count */ 943 wait_queue_head_t remove_wq; /* can be used to wait for 944 refcount drop to zero */ 945 struct zfcp_port *port; /* remote port of unit */ 946 atomic_t status; /* status of this logical unit */ 947 scsi_lun_t scsi_lun; /* own SCSI LUN */ 948 fcp_lun_t fcp_lun; /* own FCP_LUN */ 949 u32 handle; /* handle assigned by FSF */ 950 struct scsi_device *device; /* scsi device struct pointer */ 951 struct zfcp_erp_action erp_action; /* pending error recovery */ 952 atomic_t erp_counter; 953 }; 954 955 /* FSF request */ 956 struct zfcp_fsf_req { 957 struct list_head list; /* list of FSF requests */ 958 struct zfcp_adapter *adapter; /* adapter request belongs to */ 959 u8 sbal_number; /* nr of SBALs free for use */ 960 u8 sbal_first; /* first SBAL for this request */ 961 u8 sbal_last; /* last possible SBAL for 962 this reuest */ 963 u8 sbal_curr; /* current SBAL during creation 964 of request */ 965 u8 sbale_curr; /* current SBALE during creation 966 of request */ 967 wait_queue_head_t completion_wq; /* can be used by a routine 968 to wait for completion */ 969 volatile u32 status; /* status of this request */ 970 u32 fsf_command; /* FSF Command copy */ 971 struct fsf_qtcb *qtcb; /* address of associated QTCB */ 972 u32 seq_no; /* Sequence number of request */ 973 union zfcp_req_data data; /* Info fields of request */ 974 struct zfcp_erp_action *erp_action; /* used if this request is 975 issued on behalf of erp */ 976 mempool_t *pool; /* used if request was alloacted 977 from emergency pool */ 978 }; 979 980 typedef void zfcp_fsf_req_handler_t(struct zfcp_fsf_req*); 981 982 /* driver data */ 983 struct zfcp_data { 984 struct scsi_host_template scsi_host_template; 985 atomic_t status; /* Module status flags */ 986 struct list_head adapter_list_head; /* head of adapter list */ 987 struct list_head adapter_remove_lh; /* head of adapters to be 988 removed */ 989 rwlock_t status_read_lock; /* for status read thread */ 990 struct list_head status_read_receive_head; 991 struct list_head status_read_send_head; 992 struct semaphore status_read_sema; 993 wait_queue_head_t status_read_thread_wqh; 994 u32 adapters; /* # of adapters in list */ 995 rwlock_t config_lock; /* serialises changes 996 to adapter/port/unit 997 lists */ 998 struct semaphore config_sema; /* serialises configuration 999 changes */ 1000 atomic_t loglevel; /* current loglevel */ 1001 char init_busid[BUS_ID_SIZE]; 1002 wwn_t init_wwpn; 1003 fcp_lun_t init_fcp_lun; 1004 char *driver_version; 1005 }; 1006 1007 /** 1008 * struct zfcp_sg_list - struct describing a scatter-gather list 1009 * @sg: pointer to array of (struct scatterlist) 1010 * @count: number of elements in scatter-gather list 1011 */ 1012 struct zfcp_sg_list { 1013 struct scatterlist *sg; 1014 unsigned int count; 1015 }; 1016 1017 /* number of elements for various memory pools */ 1018 #define ZFCP_POOL_FSF_REQ_ERP_NR 1 1019 #define ZFCP_POOL_FSF_REQ_SCSI_NR 1 1020 #define ZFCP_POOL_FSF_REQ_ABORT_NR 1 1021 #define ZFCP_POOL_STATUS_READ_NR ZFCP_STATUS_READS_RECOM 1022 #define ZFCP_POOL_DATA_GID_PN_NR 1 1023 1024 /* struct used by memory pools for fsf_requests */ 1025 struct zfcp_fsf_req_pool_element { 1026 struct zfcp_fsf_req fsf_req; 1027 struct fsf_qtcb qtcb; 1028 }; 1029 1030 /********************** ZFCP SPECIFIC DEFINES ********************************/ 1031 1032 #define ZFCP_FSFREQ_CLEANUP_TIMEOUT HZ/10 1033 1034 #define ZFCP_KNOWN 0x00000001 1035 #define ZFCP_REQ_AUTO_CLEANUP 0x00000002 1036 #define ZFCP_WAIT_FOR_SBAL 0x00000004 1037 #define ZFCP_REQ_NO_QTCB 0x00000008 1038 1039 #define ZFCP_SET 0x00000100 1040 #define ZFCP_CLEAR 0x00000200 1041 1042 #define ZFCP_INTERRUPTIBLE 1 1043 #define ZFCP_UNINTERRUPTIBLE 0 1044 1045 #ifndef atomic_test_mask 1046 #define atomic_test_mask(mask, target) \ 1047 ((atomic_read(target) & mask) == mask) 1048 #endif 1049 1050 extern void _zfcp_hex_dump(char *, int); 1051 #define ZFCP_HEX_DUMP(level, addr, count) \ 1052 if (ZFCP_LOG_CHECK(level)) { \ 1053 _zfcp_hex_dump(addr, count); \ 1054 } 1055 1056 #define zfcp_get_busid_by_adapter(adapter) (adapter->ccw_device->dev.bus_id) 1057 #define zfcp_get_busid_by_port(port) (zfcp_get_busid_by_adapter(port->adapter)) 1058 #define zfcp_get_busid_by_unit(unit) (zfcp_get_busid_by_port(unit->port)) 1059 1060 /* 1061 * functions needed for reference/usage counting 1062 */ 1063 1064 static inline void 1065 zfcp_unit_get(struct zfcp_unit *unit) 1066 { 1067 atomic_inc(&unit->refcount); 1068 } 1069 1070 static inline void 1071 zfcp_unit_put(struct zfcp_unit *unit) 1072 { 1073 if (atomic_dec_return(&unit->refcount) == 0) 1074 wake_up(&unit->remove_wq); 1075 } 1076 1077 static inline void 1078 zfcp_unit_wait(struct zfcp_unit *unit) 1079 { 1080 wait_event(unit->remove_wq, atomic_read(&unit->refcount) == 0); 1081 } 1082 1083 static inline void 1084 zfcp_port_get(struct zfcp_port *port) 1085 { 1086 atomic_inc(&port->refcount); 1087 } 1088 1089 static inline void 1090 zfcp_port_put(struct zfcp_port *port) 1091 { 1092 if (atomic_dec_return(&port->refcount) == 0) 1093 wake_up(&port->remove_wq); 1094 } 1095 1096 static inline void 1097 zfcp_port_wait(struct zfcp_port *port) 1098 { 1099 wait_event(port->remove_wq, atomic_read(&port->refcount) == 0); 1100 } 1101 1102 static inline void 1103 zfcp_adapter_get(struct zfcp_adapter *adapter) 1104 { 1105 atomic_inc(&adapter->refcount); 1106 } 1107 1108 static inline void 1109 zfcp_adapter_put(struct zfcp_adapter *adapter) 1110 { 1111 if (atomic_dec_return(&adapter->refcount) == 0) 1112 wake_up(&adapter->remove_wq); 1113 } 1114 1115 static inline void 1116 zfcp_adapter_wait(struct zfcp_adapter *adapter) 1117 { 1118 wait_event(adapter->remove_wq, atomic_read(&adapter->refcount) == 0); 1119 } 1120 1121 #endif /* ZFCP_DEF_H */ 1122