drivers/s390/scsi/zfcp_def.h

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