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 65 /************************ DEBUG FLAGS *****************************************/ 66 67 #define ZFCP_PRINT_FLAGS 68 69 /********************* GENERAL DEFINES *********************************/ 70 71 /* zfcp version number, it consists of major, minor, and patch-level number */ 72 #define ZFCP_VERSION "4.3.0" 73 74 /** 75 * zfcp_sg_to_address - determine kernel address from struct scatterlist 76 * @list: struct scatterlist 77 * Return: kernel address 78 */ 79 static inline void * 80 zfcp_sg_to_address(struct scatterlist *list) 81 { 82 return (void *) (page_address(list->page) + list->offset); 83 } 84 85 /** 86 * zfcp_address_to_sg - set up struct scatterlist from kernel address 87 * @address: kernel address 88 * @list: struct scatterlist 89 */ 90 static inline void 91 zfcp_address_to_sg(void *address, struct scatterlist *list) 92 { 93 list->page = virt_to_page(address); 94 list->offset = ((unsigned long) address) & (PAGE_SIZE - 1); 95 } 96 97 /********************* SCSI SPECIFIC DEFINES *********************************/ 98 99 /* 32 bit for SCSI ID and LUN as long as the SCSI stack uses this type */ 100 typedef u32 scsi_id_t; 101 typedef u32 scsi_lun_t; 102 103 #define ZFCP_ERP_SCSI_LOW_MEM_TIMEOUT (100*HZ) 104 #define ZFCP_SCSI_ER_TIMEOUT (100*HZ) 105 106 /********************* CIO/QDIO SPECIFIC DEFINES *****************************/ 107 108 /* Adapter Identification Parameters */ 109 #define ZFCP_CONTROL_UNIT_TYPE 0x1731 110 #define ZFCP_CONTROL_UNIT_MODEL 0x03 111 #define ZFCP_DEVICE_TYPE 0x1732 112 #define ZFCP_DEVICE_MODEL 0x03 113 #define ZFCP_DEVICE_MODEL_PRIV 0x04 114 115 /* allow as many chained SBALs as are supported by hardware */ 116 #define ZFCP_MAX_SBALS_PER_REQ FSF_MAX_SBALS_PER_REQ 117 #define ZFCP_MAX_SBALS_PER_CT_REQ FSF_MAX_SBALS_PER_REQ 118 #define ZFCP_MAX_SBALS_PER_ELS_REQ FSF_MAX_SBALS_PER_ELS_REQ 119 120 /* DMQ bug workaround: don't use last SBALE */ 121 #define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1) 122 123 /* index of last SBALE (with respect to DMQ bug workaround) */ 124 #define ZFCP_LAST_SBALE_PER_SBAL (ZFCP_MAX_SBALES_PER_SBAL - 1) 125 126 /* max. number of (data buffer) SBALEs in largest SBAL chain */ 127 #define ZFCP_MAX_SBALES_PER_REQ \ 128 (ZFCP_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2) 129 /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */ 130 131 /* FIXME(tune): free space should be one max. SBAL chain plus what? */ 132 #define ZFCP_QDIO_PCI_INTERVAL (QDIO_MAX_BUFFERS_PER_Q \ 133 - (ZFCP_MAX_SBALS_PER_REQ + 4)) 134 135 #define ZFCP_SBAL_TIMEOUT (5*HZ) 136 137 #define ZFCP_TYPE2_RECOVERY_TIME (8*HZ) 138 139 /* queue polling (values in microseconds) */ 140 #define ZFCP_MAX_INPUT_THRESHOLD 5000 /* FIXME: tune */ 141 #define ZFCP_MAX_OUTPUT_THRESHOLD 1000 /* FIXME: tune */ 142 #define ZFCP_MIN_INPUT_THRESHOLD 1 /* ignored by QDIO layer */ 143 #define ZFCP_MIN_OUTPUT_THRESHOLD 1 /* ignored by QDIO layer */ 144 145 #define QDIO_SCSI_QFMT 1 /* 1 for FSF */ 146 147 /********************* FSF SPECIFIC DEFINES *********************************/ 148 149 #define ZFCP_ULP_INFO_VERSION 26 150 #define ZFCP_QTCB_VERSION FSF_QTCB_CURRENT_VERSION 151 /* ATTENTION: value must not be used by hardware */ 152 #define FSF_QTCB_UNSOLICITED_STATUS 0x6305 153 #define ZFCP_STATUS_READ_FAILED_THRESHOLD 3 154 #define ZFCP_STATUS_READS_RECOM FSF_STATUS_READS_RECOM 155 #define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES 6 156 #define ZFCP_EXCHANGE_CONFIG_DATA_SLEEP 50 157 158 /* timeout value for "default timer" for fsf requests */ 159 #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ); 160 161 /*************** FIBRE CHANNEL PROTOCOL SPECIFIC DEFINES ********************/ 162 163 typedef unsigned long long wwn_t; 164 typedef unsigned int fc_id_t; 165 typedef unsigned long long fcp_lun_t; 166 /* data length field may be at variable position in FCP-2 FCP_CMND IU */ 167 typedef unsigned int fcp_dl_t; 168 169 #define ZFCP_FC_SERVICE_CLASS_DEFAULT FSF_CLASS_3 170 171 /* timeout for name-server lookup (in seconds) */ 172 #define ZFCP_NS_GID_PN_TIMEOUT 10 173 174 /* largest SCSI command we can process */ 175 /* FCP-2 (FCP_CMND IU) allows up to (255-3+16) */ 176 #define ZFCP_MAX_SCSI_CMND_LENGTH 255 177 /* maximum number of commands in LUN queue (tagged queueing) */ 178 #define ZFCP_CMND_PER_LUN 32 179 180 /* task attribute values in FCP-2 FCP_CMND IU */ 181 #define SIMPLE_Q 0 182 #define HEAD_OF_Q 1 183 #define ORDERED_Q 2 184 #define ACA_Q 4 185 #define UNTAGGED 5 186 187 /* task management flags in FCP-2 FCP_CMND IU */ 188 #define FCP_CLEAR_ACA 0x40 189 #define FCP_TARGET_RESET 0x20 190 #define FCP_LOGICAL_UNIT_RESET 0x10 191 #define FCP_CLEAR_TASK_SET 0x04 192 #define FCP_ABORT_TASK_SET 0x02 193 194 #define FCP_CDB_LENGTH 16 195 196 #define ZFCP_DID_MASK 0x00FFFFFF 197 198 /* FCP(-2) FCP_CMND IU */ 199 struct fcp_cmnd_iu { 200 fcp_lun_t fcp_lun; /* FCP logical unit number */ 201 u8 crn; /* command reference number */ 202 u8 reserved0:5; /* reserved */ 203 u8 task_attribute:3; /* task attribute */ 204 u8 task_management_flags; /* task management flags */ 205 u8 add_fcp_cdb_length:6; /* additional FCP_CDB length */ 206 u8 rddata:1; /* read data */ 207 u8 wddata:1; /* write data */ 208 u8 fcp_cdb[FCP_CDB_LENGTH]; 209 } __attribute__((packed)); 210 211 /* FCP(-2) FCP_RSP IU */ 212 struct fcp_rsp_iu { 213 u8 reserved0[10]; 214 union { 215 struct { 216 u8 reserved1:3; 217 u8 fcp_conf_req:1; 218 u8 fcp_resid_under:1; 219 u8 fcp_resid_over:1; 220 u8 fcp_sns_len_valid:1; 221 u8 fcp_rsp_len_valid:1; 222 } bits; 223 u8 value; 224 } validity; 225 u8 scsi_status; 226 u32 fcp_resid; 227 u32 fcp_sns_len; 228 u32 fcp_rsp_len; 229 } __attribute__((packed)); 230 231 232 #define RSP_CODE_GOOD 0 233 #define RSP_CODE_LENGTH_MISMATCH 1 234 #define RSP_CODE_FIELD_INVALID 2 235 #define RSP_CODE_RO_MISMATCH 3 236 #define RSP_CODE_TASKMAN_UNSUPP 4 237 #define RSP_CODE_TASKMAN_FAILED 5 238 239 /* see fc-fs */ 240 #define LS_FAN 0x60000000 241 #define LS_RSCN 0x61040000 242 243 struct fcp_rscn_head { 244 u8 command; 245 u8 page_length; /* always 0x04 */ 246 u16 payload_len; 247 } __attribute__((packed)); 248 249 struct fcp_rscn_element { 250 u8 reserved:2; 251 u8 event_qual:4; 252 u8 addr_format:2; 253 u32 nport_did:24; 254 } __attribute__((packed)); 255 256 #define ZFCP_PORT_ADDRESS 0x0 257 #define ZFCP_AREA_ADDRESS 0x1 258 #define ZFCP_DOMAIN_ADDRESS 0x2 259 #define ZFCP_FABRIC_ADDRESS 0x3 260 261 #define ZFCP_PORTS_RANGE_PORT 0xFFFFFF 262 #define ZFCP_PORTS_RANGE_AREA 0xFFFF00 263 #define ZFCP_PORTS_RANGE_DOMAIN 0xFF0000 264 #define ZFCP_PORTS_RANGE_FABRIC 0x000000 265 266 #define ZFCP_NO_PORTS_PER_AREA 0x100 267 #define ZFCP_NO_PORTS_PER_DOMAIN 0x10000 268 #define ZFCP_NO_PORTS_PER_FABRIC 0x1000000 269 270 struct fcp_fan { 271 u32 command; 272 u32 fport_did; 273 wwn_t fport_wwpn; 274 wwn_t fport_wwname; 275 } __attribute__((packed)); 276 277 /* see fc-ph */ 278 struct fcp_logo { 279 u32 command; 280 u32 nport_did; 281 wwn_t nport_wwpn; 282 } __attribute__((packed)); 283 284 /* 285 * FC-FS stuff 286 */ 287 #define R_A_TOV 10 /* seconds */ 288 #define ZFCP_ELS_TIMEOUT (2 * R_A_TOV) 289 290 #define ZFCP_LS_RLS 0x0f 291 #define ZFCP_LS_ADISC 0x52 292 #define ZFCP_LS_RPS 0x56 293 #define ZFCP_LS_RSCN 0x61 294 #define ZFCP_LS_RNID 0x78 295 296 struct zfcp_ls_rjt_par { 297 u8 action; 298 u8 reason_code; 299 u8 reason_expl; 300 u8 vendor_unique; 301 } __attribute__ ((packed)); 302 303 struct zfcp_ls_adisc { 304 u8 code; 305 u8 field[3]; 306 u32 hard_nport_id; 307 u64 wwpn; 308 u64 wwnn; 309 u32 nport_id; 310 } __attribute__ ((packed)); 311 312 struct zfcp_ls_adisc_acc { 313 u8 code; 314 u8 field[3]; 315 u32 hard_nport_id; 316 u64 wwpn; 317 u64 wwnn; 318 u32 nport_id; 319 } __attribute__ ((packed)); 320 321 struct zfcp_rc_entry { 322 u8 code; 323 const char *description; 324 }; 325 326 /* 327 * FC-GS-2 stuff 328 */ 329 #define ZFCP_CT_REVISION 0x01 330 #define ZFCP_CT_DIRECTORY_SERVICE 0xFC 331 #define ZFCP_CT_NAME_SERVER 0x02 332 #define ZFCP_CT_SYNCHRONOUS 0x00 333 #define ZFCP_CT_GID_PN 0x0121 334 #define ZFCP_CT_MAX_SIZE 0x1020 335 #define ZFCP_CT_ACCEPT 0x8002 336 #define ZFCP_CT_REJECT 0x8001 337 338 /* 339 * FC-GS-4 stuff 340 */ 341 #define ZFCP_CT_TIMEOUT (3 * R_A_TOV) 342 343 344 /***************** S390 DEBUG FEATURE SPECIFIC DEFINES ***********************/ 345 346 /* debug feature entries per adapter */ 347 #define ZFCP_ERP_DBF_INDEX 1 348 #define ZFCP_ERP_DBF_AREAS 2 349 #define ZFCP_ERP_DBF_LENGTH 16 350 #define ZFCP_ERP_DBF_LEVEL 3 351 #define ZFCP_ERP_DBF_NAME "zfcperp" 352 353 #define ZFCP_CMD_DBF_INDEX 2 354 #define ZFCP_CMD_DBF_AREAS 1 355 #define ZFCP_CMD_DBF_LENGTH 8 356 #define ZFCP_CMD_DBF_LEVEL 3 357 #define ZFCP_CMD_DBF_NAME "zfcpcmd" 358 359 #define ZFCP_ABORT_DBF_INDEX 2 360 #define ZFCP_ABORT_DBF_AREAS 1 361 #define ZFCP_ABORT_DBF_LENGTH 8 362 #define ZFCP_ABORT_DBF_LEVEL 6 363 #define ZFCP_ABORT_DBF_NAME "zfcpabt" 364 365 #define ZFCP_IN_ELS_DBF_INDEX 2 366 #define ZFCP_IN_ELS_DBF_AREAS 1 367 #define ZFCP_IN_ELS_DBF_LENGTH 8 368 #define ZFCP_IN_ELS_DBF_LEVEL 6 369 #define ZFCP_IN_ELS_DBF_NAME "zfcpels" 370 371 /******************** LOGGING MACROS AND DEFINES *****************************/ 372 373 /* 374 * Logging may be applied on certain kinds of driver operations 375 * independently. Additionally, different log-levels are supported for 376 * each of these areas. 377 */ 378 379 #define ZFCP_NAME "zfcp" 380 381 /* read-only LUN sharing switch initial value */ 382 #define ZFCP_RO_LUN_SHARING_DEFAULTS 0 383 384 /* independent log areas */ 385 #define ZFCP_LOG_AREA_OTHER 0 386 #define ZFCP_LOG_AREA_SCSI 1 387 #define ZFCP_LOG_AREA_FSF 2 388 #define ZFCP_LOG_AREA_CONFIG 3 389 #define ZFCP_LOG_AREA_CIO 4 390 #define ZFCP_LOG_AREA_QDIO 5 391 #define ZFCP_LOG_AREA_ERP 6 392 #define ZFCP_LOG_AREA_FC 7 393 394 /* log level values*/ 395 #define ZFCP_LOG_LEVEL_NORMAL 0 396 #define ZFCP_LOG_LEVEL_INFO 1 397 #define ZFCP_LOG_LEVEL_DEBUG 2 398 #define ZFCP_LOG_LEVEL_TRACE 3 399 400 /* 401 * this allows removal of logging code by the preprocessor 402 * (the most detailed log level still to be compiled in is specified, 403 * higher log levels are removed) 404 */ 405 #define ZFCP_LOG_LEVEL_LIMIT ZFCP_LOG_LEVEL_TRACE 406 407 /* get "loglevel" nibble assignment */ 408 #define ZFCP_GET_LOG_VALUE(zfcp_lognibble) \ 409 ((atomic_read(&zfcp_data.loglevel) >> (zfcp_lognibble<<2)) & 0xF) 410 411 /* set "loglevel" nibble */ 412 #define ZFCP_SET_LOG_NIBBLE(value, zfcp_lognibble) \ 413 (value << (zfcp_lognibble << 2)) 414 415 /* all log-level defaults are combined to generate initial log-level */ 416 #define ZFCP_LOG_LEVEL_DEFAULTS \ 417 (ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_OTHER) | \ 418 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_SCSI) | \ 419 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FSF) | \ 420 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CONFIG) | \ 421 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CIO) | \ 422 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_QDIO) | \ 423 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_ERP) | \ 424 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FC)) 425 426 /* check whether we have the right level for logging */ 427 #define ZFCP_LOG_CHECK(level) \ 428 ((ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA)) >= level) 429 430 /* logging routine for zfcp */ 431 #define _ZFCP_LOG(fmt, args...) \ 432 printk(KERN_ERR ZFCP_NAME": %s(%d): " fmt, __FUNCTION__, \ 433 __LINE__ , ##args) 434 435 #define ZFCP_LOG(level, fmt, args...) \ 436 do { \ 437 if (ZFCP_LOG_CHECK(level)) \ 438 _ZFCP_LOG(fmt, ##args); \ 439 } while (0) 440 441 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_NORMAL 442 # define ZFCP_LOG_NORMAL(fmt, args...) 443 #else 444 # define ZFCP_LOG_NORMAL(fmt, args...) \ 445 do { \ 446 if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_NORMAL)) \ 447 printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \ 448 } while (0) 449 #endif 450 451 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_INFO 452 # define ZFCP_LOG_INFO(fmt, args...) 453 #else 454 # define ZFCP_LOG_INFO(fmt, args...) \ 455 do { \ 456 if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_INFO)) \ 457 printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \ 458 } while (0) 459 #endif 460 461 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_DEBUG 462 # define ZFCP_LOG_DEBUG(fmt, args...) 463 #else 464 # define ZFCP_LOG_DEBUG(fmt, args...) \ 465 ZFCP_LOG(ZFCP_LOG_LEVEL_DEBUG, fmt , ##args) 466 #endif 467 468 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_TRACE 469 # define ZFCP_LOG_TRACE(fmt, args...) 470 #else 471 # define ZFCP_LOG_TRACE(fmt, args...) \ 472 ZFCP_LOG(ZFCP_LOG_LEVEL_TRACE, fmt , ##args) 473 #endif 474 475 #ifndef ZFCP_PRINT_FLAGS 476 # define ZFCP_LOG_FLAGS(level, fmt, args...) 477 #else 478 extern u32 flags_dump; 479 # define ZFCP_LOG_FLAGS(level, fmt, args...) \ 480 do { \ 481 if (level <= flags_dump) \ 482 _ZFCP_LOG(fmt, ##args); \ 483 } while (0) 484 #endif 485 486 /*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/ 487 488 /* 489 * Note, the leftmost status byte is common among adapter, port 490 * and unit 491 */ 492 #define ZFCP_COMMON_FLAGS 0xfff00000 493 #define ZFCP_SPECIFIC_FLAGS 0x000fffff 494 495 /* common status bits */ 496 #define ZFCP_STATUS_COMMON_REMOVE 0x80000000 497 #define ZFCP_STATUS_COMMON_RUNNING 0x40000000 498 #define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000 499 #define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000 500 #define ZFCP_STATUS_COMMON_OPENING 0x08000000 501 #define ZFCP_STATUS_COMMON_OPEN 0x04000000 502 #define ZFCP_STATUS_COMMON_CLOSING 0x02000000 503 #define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000 504 #define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000 505 506 /* adapter status */ 507 #define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002 508 #define ZFCP_STATUS_ADAPTER_REGISTERED 0x00000004 509 #define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008 510 #define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010 511 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_UP 0x00000020 512 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL 0x00000080 513 #define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100 514 #define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200 515 516 #define ZFCP_STATUS_ADAPTER_SCSI_UP \ 517 (ZFCP_STATUS_COMMON_UNBLOCKED | \ 518 ZFCP_STATUS_ADAPTER_REGISTERED) 519 520 521 /* FC-PH/FC-GS well-known address identifiers for generic services */ 522 #define ZFCP_DID_MANAGEMENT_SERVICE 0xFFFFFA 523 #define ZFCP_DID_TIME_SERVICE 0xFFFFFB 524 #define ZFCP_DID_DIRECTORY_SERVICE 0xFFFFFC 525 #define ZFCP_DID_ALIAS_SERVICE 0xFFFFF8 526 #define ZFCP_DID_KEY_DISTRIBUTION_SERVICE 0xFFFFF7 527 528 /* remote port status */ 529 #define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001 530 #define ZFCP_STATUS_PORT_DID_DID 0x00000002 531 #define ZFCP_STATUS_PORT_PHYS_CLOSING 0x00000004 532 #define ZFCP_STATUS_PORT_NO_WWPN 0x00000008 533 #define ZFCP_STATUS_PORT_NO_SCSI_ID 0x00000010 534 #define ZFCP_STATUS_PORT_INVALID_WWPN 0x00000020 535 #define ZFCP_STATUS_PORT_ACCESS_DENIED 0x00000040 536 537 /* for ports with well known addresses */ 538 #define ZFCP_STATUS_PORT_WKA \ 539 (ZFCP_STATUS_PORT_NO_WWPN | \ 540 ZFCP_STATUS_PORT_NO_SCSI_ID) 541 542 /* logical unit status */ 543 #define ZFCP_STATUS_UNIT_NOTSUPPUNITRESET 0x00000001 544 #define ZFCP_STATUS_UNIT_TEMPORARY 0x00000002 545 #define ZFCP_STATUS_UNIT_SHARED 0x00000004 546 #define ZFCP_STATUS_UNIT_READONLY 0x00000008 547 548 /* FSF request status (this does not have a common part) */ 549 #define ZFCP_STATUS_FSFREQ_NOT_INIT 0x00000000 550 #define ZFCP_STATUS_FSFREQ_POOL 0x00000001 551 #define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT 0x00000002 552 #define ZFCP_STATUS_FSFREQ_COMPLETED 0x00000004 553 #define ZFCP_STATUS_FSFREQ_ERROR 0x00000008 554 #define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010 555 #define ZFCP_STATUS_FSFREQ_ABORTING 0x00000020 556 #define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040 557 #define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080 558 #define ZFCP_STATUS_FSFREQ_ABORTED 0x00000100 559 #define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200 560 #define ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP 0x00000400 561 #define ZFCP_STATUS_FSFREQ_RETRY 0x00000800 562 #define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000 563 564 /*********************** ERROR RECOVERY PROCEDURE DEFINES ********************/ 565 566 #define ZFCP_MAX_ERPS 3 567 568 #define ZFCP_ERP_FSFREQ_TIMEOUT (30 * HZ) 569 #define ZFCP_ERP_MEMWAIT_TIMEOUT HZ 570 571 #define ZFCP_STATUS_ERP_TIMEDOUT 0x10000000 572 #define ZFCP_STATUS_ERP_CLOSE_ONLY 0x01000000 573 #define ZFCP_STATUS_ERP_DISMISSING 0x00100000 574 #define ZFCP_STATUS_ERP_DISMISSED 0x00200000 575 #define ZFCP_STATUS_ERP_LOWMEM 0x00400000 576 577 #define ZFCP_ERP_STEP_UNINITIALIZED 0x00000000 578 #define ZFCP_ERP_STEP_FSF_XCONFIG 0x00000001 579 #define ZFCP_ERP_STEP_PHYS_PORT_CLOSING 0x00000010 580 #define ZFCP_ERP_STEP_PORT_CLOSING 0x00000100 581 #define ZFCP_ERP_STEP_NAMESERVER_OPEN 0x00000200 582 #define ZFCP_ERP_STEP_NAMESERVER_LOOKUP 0x00000400 583 #define ZFCP_ERP_STEP_PORT_OPENING 0x00000800 584 #define ZFCP_ERP_STEP_UNIT_CLOSING 0x00001000 585 #define ZFCP_ERP_STEP_UNIT_OPENING 0x00002000 586 587 /* Ordered by escalation level (necessary for proper erp-code operation) */ 588 #define ZFCP_ERP_ACTION_REOPEN_ADAPTER 0x4 589 #define ZFCP_ERP_ACTION_REOPEN_PORT_FORCED 0x3 590 #define ZFCP_ERP_ACTION_REOPEN_PORT 0x2 591 #define ZFCP_ERP_ACTION_REOPEN_UNIT 0x1 592 593 #define ZFCP_ERP_ACTION_RUNNING 0x1 594 #define ZFCP_ERP_ACTION_READY 0x2 595 596 #define ZFCP_ERP_SUCCEEDED 0x0 597 #define ZFCP_ERP_FAILED 0x1 598 #define ZFCP_ERP_CONTINUES 0x2 599 #define ZFCP_ERP_EXIT 0x3 600 #define ZFCP_ERP_DISMISSED 0x4 601 #define ZFCP_ERP_NOMEM 0x5 602 603 604 /******************** CFDC SPECIFIC STUFF *****************************/ 605 606 /* Firewall data channel sense data record */ 607 struct zfcp_cfdc_sense_data { 608 u32 signature; /* Request signature */ 609 u32 devno; /* FCP adapter device number */ 610 u32 command; /* Command code */ 611 u32 fsf_status; /* FSF request status and status qualifier */ 612 u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE]; 613 u8 payloads[256]; /* Access conflicts list */ 614 u8 control_file[0]; /* Access control table */ 615 }; 616 617 #define ZFCP_CFDC_SIGNATURE 0xCFDCACDF 618 619 #define ZFCP_CFDC_CMND_DOWNLOAD_NORMAL 0x00010001 620 #define ZFCP_CFDC_CMND_DOWNLOAD_FORCE 0x00010101 621 #define ZFCP_CFDC_CMND_FULL_ACCESS 0x00000201 622 #define ZFCP_CFDC_CMND_RESTRICTED_ACCESS 0x00000401 623 #define ZFCP_CFDC_CMND_UPLOAD 0x00010002 624 625 #define ZFCP_CFDC_DOWNLOAD 0x00000001 626 #define ZFCP_CFDC_UPLOAD 0x00000002 627 #define ZFCP_CFDC_WITH_CONTROL_FILE 0x00010000 628 629 #define ZFCP_CFDC_DEV_NAME "zfcp_cfdc" 630 #define ZFCP_CFDC_DEV_MAJOR MISC_MAJOR 631 #define ZFCP_CFDC_DEV_MINOR MISC_DYNAMIC_MINOR 632 633 #define ZFCP_CFDC_MAX_CONTROL_FILE_SIZE 127 * 1024 634 635 /************************* STRUCTURE DEFINITIONS *****************************/ 636 637 struct zfcp_fsf_req; 638 639 /* holds various memory pools of an adapter */ 640 struct zfcp_adapter_mempool { 641 mempool_t *fsf_req_erp; 642 mempool_t *fsf_req_scsi; 643 mempool_t *fsf_req_abort; 644 mempool_t *fsf_req_status_read; 645 mempool_t *data_status_read; 646 mempool_t *data_gid_pn; 647 }; 648 649 struct zfcp_exchange_config_data{ 650 }; 651 652 struct zfcp_open_port { 653 struct zfcp_port *port; 654 }; 655 656 struct zfcp_close_port { 657 struct zfcp_port *port; 658 }; 659 660 struct zfcp_open_unit { 661 struct zfcp_unit *unit; 662 }; 663 664 struct zfcp_close_unit { 665 struct zfcp_unit *unit; 666 }; 667 668 struct zfcp_close_physical_port { 669 struct zfcp_port *port; 670 }; 671 672 struct zfcp_send_fcp_command_task { 673 struct zfcp_fsf_req *fsf_req; 674 struct zfcp_unit *unit; 675 struct scsi_cmnd *scsi_cmnd; 676 unsigned long start_jiffies; 677 }; 678 679 struct zfcp_send_fcp_command_task_management { 680 struct zfcp_unit *unit; 681 }; 682 683 struct zfcp_abort_fcp_command { 684 struct zfcp_fsf_req *fsf_req; 685 struct zfcp_unit *unit; 686 }; 687 688 /* 689 * header for CT_IU 690 */ 691 struct ct_hdr { 692 u8 revision; // 0x01 693 u8 in_id[3]; // 0x00 694 u8 gs_type; // 0xFC Directory Service 695 u8 gs_subtype; // 0x02 Name Server 696 u8 options; // 0x00 single bidirectional exchange 697 u8 reserved0; 698 u16 cmd_rsp_code; // 0x0121 GID_PN, or 0x0100 GA_NXT 699 u16 max_res_size; // <= (4096 - 16) / 4 700 u8 reserved1; 701 u8 reason_code; 702 u8 reason_code_expl; 703 u8 vendor_unique; 704 } __attribute__ ((packed)); 705 706 /* nameserver request CT_IU -- for requests where 707 * a port name is required */ 708 struct ct_iu_gid_pn_req { 709 struct ct_hdr header; 710 wwn_t wwpn; 711 } __attribute__ ((packed)); 712 713 /* FS_ACC IU and data unit for GID_PN nameserver request */ 714 struct ct_iu_gid_pn_resp { 715 struct ct_hdr header; 716 fc_id_t d_id; 717 } __attribute__ ((packed)); 718 719 typedef void (*zfcp_send_ct_handler_t)(unsigned long); 720 721 /** 722 * struct zfcp_send_ct - used to pass parameters to function zfcp_fsf_send_ct 723 * @port: port where the request is sent to 724 * @req: scatter-gather list for request 725 * @resp: scatter-gather list for response 726 * @req_count: number of elements in request scatter-gather list 727 * @resp_count: number of elements in response scatter-gather list 728 * @handler: handler function (called for response to the request) 729 * @handler_data: data passed to handler function 730 * @pool: pointer to memory pool for ct request structure 731 * @timeout: FSF timeout for this request 732 * @timer: timer (e.g. for request initiated by erp) 733 * @completion: completion for synchronization purposes 734 * @status: used to pass error status to calling function 735 */ 736 struct zfcp_send_ct { 737 struct zfcp_port *port; 738 struct scatterlist *req; 739 struct scatterlist *resp; 740 unsigned int req_count; 741 unsigned int resp_count; 742 zfcp_send_ct_handler_t handler; 743 unsigned long handler_data; 744 mempool_t *pool; 745 int timeout; 746 struct timer_list *timer; 747 struct completion *completion; 748 int status; 749 }; 750 751 /* used for name server requests in error recovery */ 752 struct zfcp_gid_pn_data { 753 struct zfcp_send_ct ct; 754 struct scatterlist req; 755 struct scatterlist resp; 756 struct ct_iu_gid_pn_req ct_iu_req; 757 struct ct_iu_gid_pn_resp ct_iu_resp; 758 struct zfcp_port *port; 759 }; 760 761 typedef void (*zfcp_send_els_handler_t)(unsigned long); 762 763 /** 764 * struct zfcp_send_els - used to pass parameters to function zfcp_fsf_send_els 765 * @adapter: adapter where request is sent from 766 * @d_id: destiniation id of port where request is sent to 767 * @req: scatter-gather list for request 768 * @resp: scatter-gather list for response 769 * @req_count: number of elements in request scatter-gather list 770 * @resp_count: number of elements in response scatter-gather list 771 * @handler: handler function (called for response to the request) 772 * @handler_data: data passed to handler function 773 * @timer: timer (e.g. for request initiated by erp) 774 * @completion: completion for synchronization purposes 775 * @ls_code: hex code of ELS command 776 * @status: used to pass error status to calling function 777 */ 778 struct zfcp_send_els { 779 struct zfcp_adapter *adapter; 780 fc_id_t d_id; 781 struct scatterlist *req; 782 struct scatterlist *resp; 783 unsigned int req_count; 784 unsigned int resp_count; 785 zfcp_send_els_handler_t handler; 786 unsigned long handler_data; 787 struct timer_list *timer; 788 struct completion *completion; 789 int ls_code; 790 int status; 791 }; 792 793 struct zfcp_status_read { 794 struct fsf_status_read_buffer *buffer; 795 }; 796 797 struct zfcp_fsf_done { 798 struct completion *complete; 799 int status; 800 }; 801 802 /* request specific data */ 803 union zfcp_req_data { 804 struct zfcp_exchange_config_data exchange_config_data; 805 struct zfcp_open_port open_port; 806 struct zfcp_close_port close_port; 807 struct zfcp_open_unit open_unit; 808 struct zfcp_close_unit close_unit; 809 struct zfcp_close_physical_port close_physical_port; 810 struct zfcp_send_fcp_command_task send_fcp_command_task; 811 struct zfcp_send_fcp_command_task_management 812 send_fcp_command_task_management; 813 struct zfcp_abort_fcp_command abort_fcp_command; 814 struct zfcp_send_ct *send_ct; 815 struct zfcp_send_els *send_els; 816 struct zfcp_status_read status_read; 817 struct fsf_qtcb_bottom_port *port_data; 818 }; 819 820 struct zfcp_qdio_queue { 821 struct qdio_buffer *buffer[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */ 822 u8 free_index; /* index of next free bfr 823 in queue (free_count>0) */ 824 atomic_t free_count; /* number of free buffers 825 in queue */ 826 rwlock_t queue_lock; /* lock for operations on queue */ 827 int distance_from_int; /* SBALs used since PCI indication 828 was last set */ 829 }; 830 831 struct zfcp_erp_action { 832 struct list_head list; 833 int action; /* requested action code */ 834 struct zfcp_adapter *adapter; /* device which should be recovered */ 835 struct zfcp_port *port; 836 struct zfcp_unit *unit; 837 volatile u32 status; /* recovery status */ 838 u32 step; /* active step of this erp action */ 839 struct zfcp_fsf_req *fsf_req; /* fsf request currently pending 840 for this action */ 841 struct timer_list timer; 842 }; 843 844 845 struct zfcp_adapter { 846 struct list_head list; /* list of adapters */ 847 atomic_t refcount; /* reference count */ 848 wait_queue_head_t remove_wq; /* can be used to wait for 849 refcount drop to zero */ 850 wwn_t wwnn; /* WWNN */ 851 wwn_t wwpn; /* WWPN */ 852 fc_id_t s_id; /* N_Port ID */ 853 wwn_t peer_wwnn; /* P2P peer WWNN */ 854 wwn_t peer_wwpn; /* P2P peer WWPN */ 855 fc_id_t peer_d_id; /* P2P peer D_ID */ 856 struct ccw_device *ccw_device; /* S/390 ccw device */ 857 u8 fc_service_class; 858 u32 fc_topology; /* FC topology */ 859 u32 fc_link_speed; /* FC interface speed */ 860 u32 hydra_version; /* Hydra version */ 861 u32 fsf_lic_version; 862 u32 supported_features;/* of FCP channel */ 863 u32 hardware_version; /* of FCP channel */ 864 u8 serial_number[32]; /* of hardware */ 865 struct Scsi_Host *scsi_host; /* Pointer to mid-layer */ 866 unsigned short scsi_host_no; /* Assigned host number */ 867 unsigned char name[9]; 868 struct list_head port_list_head; /* remote port list */ 869 struct list_head port_remove_lh; /* head of ports to be 870 removed */ 871 u32 ports; /* number of remote ports */ 872 struct timer_list scsi_er_timer; /* SCSI err recovery watch */ 873 struct list_head fsf_req_list_head; /* head of FSF req list */ 874 rwlock_t fsf_req_list_lock; /* lock for ops on list of 875 FSF requests */ 876 atomic_t fsf_reqs_active; /* # active FSF reqs */ 877 struct zfcp_qdio_queue request_queue; /* request queue */ 878 u32 fsf_req_seq_no; /* FSF cmnd seq number */ 879 wait_queue_head_t request_wq; /* can be used to wait for 880 more avaliable SBALs */ 881 struct zfcp_qdio_queue response_queue; /* response queue */ 882 rwlock_t abort_lock; /* Protects against SCSI 883 stack abort/command 884 completion races */ 885 u16 status_read_failed; /* # failed status reads */ 886 atomic_t status; /* status of this adapter */ 887 struct list_head erp_ready_head; /* error recovery for this 888 adapter/devices */ 889 struct list_head erp_running_head; 890 rwlock_t erp_lock; 891 struct semaphore erp_ready_sem; 892 wait_queue_head_t erp_thread_wqh; 893 wait_queue_head_t erp_done_wqh; 894 struct zfcp_erp_action erp_action; /* pending error recovery */ 895 atomic_t erp_counter; 896 u32 erp_total_count; /* total nr of enqueued erp 897 actions */ 898 u32 erp_low_mem_count; /* nr of erp actions waiting 899 for memory */ 900 struct zfcp_port *nameserver_port; /* adapter's nameserver */ 901 debug_info_t *erp_dbf; /* S/390 debug features */ 902 debug_info_t *abort_dbf; 903 debug_info_t *in_els_dbf; 904 debug_info_t *cmd_dbf; 905 spinlock_t dbf_lock; 906 struct zfcp_adapter_mempool pool; /* Adapter memory pools */ 907 struct qdio_initialize qdio_init_data; /* for qdio_establish */ 908 struct device generic_services; /* directory for WKA ports */ 909 }; 910 911 /* 912 * the struct device sysfs_device must be at the beginning of this structure. 913 * pointer to struct device is used to free port structure in release function 914 * of the device. don't change! 915 */ 916 struct zfcp_port { 917 struct device sysfs_device; /* sysfs device */ 918 struct list_head list; /* list of remote ports */ 919 atomic_t refcount; /* reference count */ 920 wait_queue_head_t remove_wq; /* can be used to wait for 921 refcount drop to zero */ 922 struct zfcp_adapter *adapter; /* adapter used to access port */ 923 struct list_head unit_list_head; /* head of logical unit list */ 924 struct list_head unit_remove_lh; /* head of luns to be removed 925 list */ 926 u32 units; /* # of logical units in list */ 927 atomic_t status; /* status of this remote port */ 928 scsi_id_t scsi_id; /* own SCSI ID */ 929 wwn_t wwnn; /* WWNN if known */ 930 wwn_t wwpn; /* WWPN */ 931 fc_id_t d_id; /* D_ID */ 932 u32 handle; /* handle assigned by FSF */ 933 struct zfcp_erp_action erp_action; /* pending error recovery */ 934 atomic_t erp_counter; 935 }; 936 937 /* the struct device sysfs_device must be at the beginning of this structure. 938 * pointer to struct device is used to free unit structure in release function 939 * of the device. don't change! 940 */ 941 struct zfcp_unit { 942 struct device sysfs_device; /* sysfs device */ 943 struct list_head list; /* list of logical units */ 944 atomic_t refcount; /* reference count */ 945 wait_queue_head_t remove_wq; /* can be used to wait for 946 refcount drop to zero */ 947 struct zfcp_port *port; /* remote port of unit */ 948 atomic_t status; /* status of this logical unit */ 949 scsi_lun_t scsi_lun; /* own SCSI LUN */ 950 fcp_lun_t fcp_lun; /* own FCP_LUN */ 951 u32 handle; /* handle assigned by FSF */ 952 struct scsi_device *device; /* scsi device struct pointer */ 953 struct zfcp_erp_action erp_action; /* pending error recovery */ 954 atomic_t erp_counter; 955 }; 956 957 /* FSF request */ 958 struct zfcp_fsf_req { 959 struct list_head list; /* list of FSF requests */ 960 struct zfcp_adapter *adapter; /* adapter request belongs to */ 961 u8 sbal_number; /* nr of SBALs free for use */ 962 u8 sbal_first; /* first SBAL for this request */ 963 u8 sbal_last; /* last possible SBAL for 964 this reuest */ 965 u8 sbal_curr; /* current SBAL during creation 966 of request */ 967 u8 sbale_curr; /* current SBALE during creation 968 of request */ 969 wait_queue_head_t completion_wq; /* can be used by a routine 970 to wait for completion */ 971 volatile u32 status; /* status of this request */ 972 u32 fsf_command; /* FSF Command copy */ 973 struct fsf_qtcb *qtcb; /* address of associated QTCB */ 974 u32 seq_no; /* Sequence number of request */ 975 union zfcp_req_data data; /* Info fields of request */ 976 struct zfcp_erp_action *erp_action; /* used if this request is 977 issued on behalf of erp */ 978 mempool_t *pool; /* used if request was alloacted 979 from emergency pool */ 980 }; 981 982 typedef void zfcp_fsf_req_handler_t(struct zfcp_fsf_req*); 983 984 /* driver data */ 985 struct zfcp_data { 986 struct scsi_host_template scsi_host_template; 987 atomic_t status; /* Module status flags */ 988 struct list_head adapter_list_head; /* head of adapter list */ 989 struct list_head adapter_remove_lh; /* head of adapters to be 990 removed */ 991 rwlock_t status_read_lock; /* for status read thread */ 992 struct list_head status_read_receive_head; 993 struct list_head status_read_send_head; 994 struct semaphore status_read_sema; 995 wait_queue_head_t status_read_thread_wqh; 996 u32 adapters; /* # of adapters in list */ 997 rwlock_t config_lock; /* serialises changes 998 to adapter/port/unit 999 lists */ 1000 struct semaphore config_sema; /* serialises configuration 1001 changes */ 1002 atomic_t loglevel; /* current loglevel */ 1003 char init_busid[BUS_ID_SIZE]; 1004 wwn_t init_wwpn; 1005 fcp_lun_t init_fcp_lun; 1006 char *driver_version; 1007 }; 1008 1009 /** 1010 * struct zfcp_sg_list - struct describing a scatter-gather list 1011 * @sg: pointer to array of (struct scatterlist) 1012 * @count: number of elements in scatter-gather list 1013 */ 1014 struct zfcp_sg_list { 1015 struct scatterlist *sg; 1016 unsigned int count; 1017 }; 1018 1019 /* number of elements for various memory pools */ 1020 #define ZFCP_POOL_FSF_REQ_ERP_NR 1 1021 #define ZFCP_POOL_FSF_REQ_SCSI_NR 1 1022 #define ZFCP_POOL_FSF_REQ_ABORT_NR 1 1023 #define ZFCP_POOL_STATUS_READ_NR ZFCP_STATUS_READS_RECOM 1024 #define ZFCP_POOL_DATA_GID_PN_NR 1 1025 1026 /* struct used by memory pools for fsf_requests */ 1027 struct zfcp_fsf_req_pool_element { 1028 struct zfcp_fsf_req fsf_req; 1029 struct fsf_qtcb qtcb; 1030 }; 1031 1032 /********************** ZFCP SPECIFIC DEFINES ********************************/ 1033 1034 #define ZFCP_FSFREQ_CLEANUP_TIMEOUT HZ/10 1035 1036 #define ZFCP_KNOWN 0x00000001 1037 #define ZFCP_REQ_AUTO_CLEANUP 0x00000002 1038 #define ZFCP_WAIT_FOR_SBAL 0x00000004 1039 #define ZFCP_REQ_NO_QTCB 0x00000008 1040 1041 #define ZFCP_SET 0x00000100 1042 #define ZFCP_CLEAR 0x00000200 1043 1044 #define ZFCP_INTERRUPTIBLE 1 1045 #define ZFCP_UNINTERRUPTIBLE 0 1046 1047 #ifndef atomic_test_mask 1048 #define atomic_test_mask(mask, target) \ 1049 ((atomic_read(target) & mask) == mask) 1050 #endif 1051 1052 extern void _zfcp_hex_dump(char *, int); 1053 #define ZFCP_HEX_DUMP(level, addr, count) \ 1054 if (ZFCP_LOG_CHECK(level)) { \ 1055 _zfcp_hex_dump(addr, count); \ 1056 } 1057 1058 #define zfcp_get_busid_by_adapter(adapter) (adapter->ccw_device->dev.bus_id) 1059 #define zfcp_get_busid_by_port(port) (zfcp_get_busid_by_adapter(port->adapter)) 1060 #define zfcp_get_busid_by_unit(unit) (zfcp_get_busid_by_port(unit->port)) 1061 1062 /* 1063 * functions needed for reference/usage counting 1064 */ 1065 1066 static inline void 1067 zfcp_unit_get(struct zfcp_unit *unit) 1068 { 1069 atomic_inc(&unit->refcount); 1070 } 1071 1072 static inline void 1073 zfcp_unit_put(struct zfcp_unit *unit) 1074 { 1075 if (atomic_dec_return(&unit->refcount) == 0) 1076 wake_up(&unit->remove_wq); 1077 } 1078 1079 static inline void 1080 zfcp_unit_wait(struct zfcp_unit *unit) 1081 { 1082 wait_event(unit->remove_wq, atomic_read(&unit->refcount) == 0); 1083 } 1084 1085 static inline void 1086 zfcp_port_get(struct zfcp_port *port) 1087 { 1088 atomic_inc(&port->refcount); 1089 } 1090 1091 static inline void 1092 zfcp_port_put(struct zfcp_port *port) 1093 { 1094 if (atomic_dec_return(&port->refcount) == 0) 1095 wake_up(&port->remove_wq); 1096 } 1097 1098 static inline void 1099 zfcp_port_wait(struct zfcp_port *port) 1100 { 1101 wait_event(port->remove_wq, atomic_read(&port->refcount) == 0); 1102 } 1103 1104 static inline void 1105 zfcp_adapter_get(struct zfcp_adapter *adapter) 1106 { 1107 atomic_inc(&adapter->refcount); 1108 } 1109 1110 static inline void 1111 zfcp_adapter_put(struct zfcp_adapter *adapter) 1112 { 1113 if (atomic_dec_return(&adapter->refcount) == 0) 1114 wake_up(&adapter->remove_wq); 1115 } 1116 1117 static inline void 1118 zfcp_adapter_wait(struct zfcp_adapter *adapter) 1119 { 1120 wait_event(adapter->remove_wq, atomic_read(&adapter->refcount) == 0); 1121 } 1122 1123 #endif /* ZFCP_DEF_H */ 1124