drivers/s390/scsi/zfcp_def.h

   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 */