drivers/scsi/ibmvscsi/ibmvfc.h

   1 /*
   2  * ibmvfc.h -- driver for IBM Power Virtual Fibre Channel Adapter
   3  *
   4  * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
   5  *
   6  * Copyright (C) IBM Corporation, 2008
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  */
  23
  24 #ifndef _IBMVFC_H
  25 #define _IBMVFC_H
  26
  27 #include <linux/list.h>
  28 #include <linux/types.h>
  29 #include "viosrp.h"
  30
  31 #define IBMVFC_NAME     "ibmvfc"
  32 #define IBMVFC_DRIVER_VERSION           "1.0.0"
  33 #define IBMVFC_DRIVER_DATE              "(July 1, 2008)"
  34
  35 #define IBMVFC_DEFAULT_TIMEOUT  15
  36 #define IBMVFC_INIT_TIMEOUT             30
  37 #define IBMVFC_MAX_REQUESTS_DEFAULT     100
  38
  39 #define IBMVFC_DEBUG                    0
  40 #define IBMVFC_MAX_TARGETS              1024
  41 #define IBMVFC_MAX_LUN                  0xffffffff
  42 #define IBMVFC_MAX_SECTORS              0xffffu
  43 #define IBMVFC_MAX_DISC_THREADS 4
  44 #define IBMVFC_TGT_MEMPOOL_SZ           64
  45 #define IBMVFC_MAX_CMDS_PER_LUN 64
  46 #define IBMVFC_MAX_INIT_RETRIES 3
  47 #define IBMVFC_DEV_LOSS_TMO             (5 * 60)
  48 #define IBMVFC_DEFAULT_LOG_LEVEL        2
  49 #define IBMVFC_MAX_CDB_LEN              16
  50
  51 /*
  52  * Ensure we have resources for ERP and initialization:
  53  * 1 for ERP
  54  * 1 for initialization
  55  * 1 for each discovery thread
  56  */
  57 #define IBMVFC_NUM_INTERNAL_REQ (1 + 1 + disc_threads)
  58
  59 #define IBMVFC_MAD_SUCCESS              0x00
  60 #define IBMVFC_MAD_NOT_SUPPORTED        0xF1
  61 #define IBMVFC_MAD_FAILED               0xF7
  62 #define IBMVFC_MAD_DRIVER_FAILED        0xEE
  63 #define IBMVFC_MAD_CRQ_ERROR            0xEF
  64
  65 enum ibmvfc_crq_valid {
  66         IBMVFC_CRQ_CMD_RSP              = 0x80,
  67         IBMVFC_CRQ_INIT_RSP             = 0xC0,
  68         IBMVFC_CRQ_XPORT_EVENT          = 0xFF,
  69 };
  70
  71 enum ibmvfc_crq_format {
  72         IBMVFC_CRQ_INIT                 = 0x01,
  73         IBMVFC_CRQ_INIT_COMPLETE        = 0x02,
  74         IBMVFC_PARTITION_MIGRATED       = 0x06,
  75 };
  76
  77 enum ibmvfc_cmd_status_flags {
  78         IBMVFC_FABRIC_MAPPED            = 0x0001,
  79         IBMVFC_VIOS_FAILURE             = 0x0002,
  80         IBMVFC_FC_FAILURE                       = 0x0004,
  81         IBMVFC_FC_SCSI_ERROR            = 0x0008,
  82         IBMVFC_HW_EVENT_LOGGED          = 0x0010,
  83         IBMVFC_VIOS_LOGGED              = 0x0020,
  84 };
  85
  86 enum ibmvfc_fabric_mapped_errors {
  87         IBMVFC_UNABLE_TO_ESTABLISH      = 0x0001,
  88         IBMVFC_XPORT_FAULT              = 0x0002,
  89         IBMVFC_CMD_TIMEOUT              = 0x0003,
  90         IBMVFC_ENETDOWN                 = 0x0004,
  91         IBMVFC_HW_FAILURE                       = 0x0005,
  92         IBMVFC_LINK_DOWN_ERR            = 0x0006,
  93         IBMVFC_LINK_DEAD_ERR            = 0x0007,
  94         IBMVFC_UNABLE_TO_REGISTER       = 0x0008,
  95         IBMVFC_XPORT_BUSY                       = 0x000A,
  96         IBMVFC_XPORT_DEAD                       = 0x000B,
  97         IBMVFC_CONFIG_ERROR             = 0x000C,
  98         IBMVFC_NAME_SERVER_FAIL         = 0x000D,
  99         IBMVFC_LINK_HALTED              = 0x000E,
 100         IBMVFC_XPORT_GENERAL            = 0x8000,
 101 };
 102
 103 enum ibmvfc_vios_errors {
 104         IBMVFC_CRQ_FAILURE                      = 0x0001,
 105         IBMVFC_SW_FAILURE                               = 0x0002,
 106         IBMVFC_INVALID_PARAMETER                = 0x0003,
 107         IBMVFC_MISSING_PARAMETER                = 0x0004,
 108         IBMVFC_HOST_IO_BUS                      = 0x0005,
 109         IBMVFC_TRANS_CANCELLED                  = 0x0006,
 110         IBMVFC_TRANS_CANCELLED_IMPLICIT = 0x0007,
 111         IBMVFC_INSUFFICIENT_RESOURCE            = 0x0008,
 112         IBMVFC_COMMAND_FAILED                   = 0x8000,
 113 };
 114
 115 enum ibmvfc_mad_types {
 116         IBMVFC_NPIV_LOGIN               = 0x0001,
 117         IBMVFC_DISC_TARGETS     = 0x0002,
 118         IBMVFC_PORT_LOGIN               = 0x0004,
 119         IBMVFC_PROCESS_LOGIN    = 0x0008,
 120         IBMVFC_QUERY_TARGET     = 0x0010,
 121         IBMVFC_IMPLICIT_LOGOUT  = 0x0040,
 122         IBMVFC_TMF_MAD          = 0x0100,
 123 };
 124
 125 struct ibmvfc_mad_common {
 126         u32 version;
 127         u32 reserved;
 128         u32 opcode;
 129         u16 status;
 130         u16 length;
 131         u64 tag;
 132 }__attribute__((packed, aligned (8)));
 133
 134 struct ibmvfc_npiv_login_mad {
 135         struct ibmvfc_mad_common common;
 136         struct srp_direct_buf buffer;
 137 }__attribute__((packed, aligned (8)));
 138
 139 #define IBMVFC_MAX_NAME 256
 140
 141 struct ibmvfc_npiv_login {
 142         u32 ostype;
 143 #define IBMVFC_OS_LINUX 0x02
 144         u32 pad;
 145         u64 max_dma_len;
 146         u32 max_payload;
 147         u32 max_response;
 148         u32 partition_num;
 149         u32 vfc_frame_version;
 150         u16 fcp_version;
 151         u16 flags;
 152 #define IBMVFC_CLIENT_MIGRATED  0x01
 153 #define IBMVFC_FLUSH_ON_HALT            0x02
 154         u32 max_cmds;
 155         u64 capabilities;
 156 #define IBMVFC_CAN_MIGRATE              0x01
 157         u64 node_name;
 158         struct srp_direct_buf async;
 159         u8 partition_name[IBMVFC_MAX_NAME];
 160         u8 device_name[IBMVFC_MAX_NAME];
 161         u8 drc_name[IBMVFC_MAX_NAME];
 162         u64 reserved2[2];
 163 }__attribute__((packed, aligned (8)));
 164
 165 struct ibmvfc_common_svc_parms {
 166         u16 fcph_version;
 167         u16 b2b_credit;
 168         u16 features;
 169         u16 bb_rcv_sz; /* upper nibble is BB_SC_N */
 170         u32 ratov;
 171         u32 edtov;
 172 }__attribute__((packed, aligned (4)));
 173
 174 struct ibmvfc_service_parms {
 175         struct ibmvfc_common_svc_parms common;
 176         u8 port_name[8];
 177         u8 node_name[8];
 178         u32 class1_parms[4];
 179         u32 class2_parms[4];
 180         u32 class3_parms[4];
 181         u32 obsolete[4];
 182         u32 vendor_version[4];
 183         u32 services_avail[2];
 184         u32 ext_len;
 185         u32 reserved[30];
 186         u32 clk_sync_qos[2];
 187 }__attribute__((packed, aligned (4)));
 188
 189 struct ibmvfc_npiv_login_resp {
 190         u32 version;
 191         u16 status;
 192         u16 error;
 193         u32 flags;
 194 #define IBMVFC_NATIVE_FC                0x01
 195 #define IBMVFC_CAN_FLUSH_ON_HALT        0x08
 196         u32 reserved;
 197         u64 capabilites;
 198         u32 max_cmds;
 199         u32 scsi_id_sz;
 200         u64 max_dma_len;
 201         u64 scsi_id;
 202         u64 port_name;
 203         u64 node_name;
 204         u64 link_speed;
 205         u8 partition_name[IBMVFC_MAX_NAME];
 206         u8 device_name[IBMVFC_MAX_NAME];
 207         u8 port_loc_code[IBMVFC_MAX_NAME];
 208         u8 drc_name[IBMVFC_MAX_NAME];
 209         struct ibmvfc_service_parms service_parms;
 210         u64 reserved2;
 211 }__attribute__((packed, aligned (8)));
 212
 213 union ibmvfc_npiv_login_data {
 214         struct ibmvfc_npiv_login login;
 215         struct ibmvfc_npiv_login_resp resp;
 216 }__attribute__((packed, aligned (8)));
 217
 218 struct ibmvfc_discover_targets_buf {
 219         u32 scsi_id[1];
 220 #define IBMVFC_DISC_TGT_SCSI_ID_MASK    0x00ffffff
 221 };
 222
 223 struct ibmvfc_discover_targets {
 224         struct ibmvfc_mad_common common;
 225         struct srp_direct_buf buffer;
 226         u32 flags;
 227         u16 status;
 228         u16 error;
 229         u32 bufflen;
 230         u32 num_avail;
 231         u32 num_written;
 232         u64 reserved[2];
 233 }__attribute__((packed, aligned (8)));
 234
 235 enum ibmvfc_fc_reason {
 236         IBMVFC_INVALID_ELS_CMD_CODE     = 0x01,
 237         IBMVFC_INVALID_VERSION          = 0x02,
 238         IBMVFC_LOGICAL_ERROR            = 0x03,
 239         IBMVFC_INVALID_CT_IU_SIZE       = 0x04,
 240         IBMVFC_LOGICAL_BUSY             = 0x05,
 241         IBMVFC_PROTOCOL_ERROR           = 0x07,
 242         IBMVFC_UNABLE_TO_PERFORM_REQ    = 0x09,
 243         IBMVFC_CMD_NOT_SUPPORTED        = 0x0B,
 244         IBMVFC_SERVER_NOT_AVAIL         = 0x0D,
 245         IBMVFC_CMD_IN_PROGRESS          = 0x0E,
 246         IBMVFC_VENDOR_SPECIFIC          = 0xFF,
 247 };
 248
 249 enum ibmvfc_fc_type {
 250         IBMVFC_FABRIC_REJECT    = 0x01,
 251         IBMVFC_PORT_REJECT      = 0x02,
 252         IBMVFC_LS_REJECT                = 0x03,
 253         IBMVFC_FABRIC_BUSY      = 0x04,
 254         IBMVFC_PORT_BUSY                = 0x05,
 255         IBMVFC_BASIC_REJECT     = 0x06,
 256 };
 257
 258 enum ibmvfc_gs_explain {
 259         IBMVFC_PORT_NAME_NOT_REG        = 0x02,
 260 };
 261
 262 struct ibmvfc_port_login {
 263         struct ibmvfc_mad_common common;
 264         u64 scsi_id;
 265         u16 reserved;
 266         u16 fc_service_class;
 267         u32 blksz;
 268         u32 hdr_per_blk;
 269         u16 status;
 270         u16 error;              /* also fc_reason */
 271         u16 fc_explain;
 272         u16 fc_type;
 273         u32 reserved2;
 274         struct ibmvfc_service_parms service_parms;
 275         struct ibmvfc_service_parms service_parms_change;
 276         u64 reserved3[2];
 277 }__attribute__((packed, aligned (8)));
 278
 279 struct ibmvfc_prli_svc_parms {
 280         u8 type;
 281 #define IBMVFC_SCSI_FCP_TYPE            0x08
 282         u8 type_ext;
 283         u16 flags;
 284 #define IBMVFC_PRLI_ORIG_PA_VALID                       0x8000
 285 #define IBMVFC_PRLI_RESP_PA_VALID                       0x4000
 286 #define IBMVFC_PRLI_EST_IMG_PAIR                        0x2000
 287         u32 orig_pa;
 288         u32 resp_pa;
 289         u32 service_parms;
 290 #define IBMVFC_PRLI_TASK_RETRY                  0x00000200
 291 #define IBMVFC_PRLI_RETRY                               0x00000100
 292 #define IBMVFC_PRLI_DATA_OVERLAY                        0x00000040
 293 #define IBMVFC_PRLI_INITIATOR_FUNC                      0x00000020
 294 #define IBMVFC_PRLI_TARGET_FUNC                 0x00000010
 295 #define IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED  0x00000002
 296 #define IBMVFC_PRLI_WR_FCP_XFER_RDY_DISABLED    0x00000001
 297 }__attribute__((packed, aligned (4)));
 298
 299 struct ibmvfc_process_login {
 300         struct ibmvfc_mad_common common;
 301         u64 scsi_id;
 302         struct ibmvfc_prli_svc_parms parms;
 303         u8 reserved[48];
 304         u16 status;
 305         u16 error;                      /* also fc_reason */
 306         u32 reserved2;
 307         u64 reserved3[2];
 308 }__attribute__((packed, aligned (8)));
 309
 310 struct ibmvfc_query_tgt {
 311         struct ibmvfc_mad_common common;
 312         u64 wwpn;
 313         u64 scsi_id;
 314         u16 status;
 315         u16 error;
 316         u16 fc_explain;
 317         u16 fc_type;
 318         u64 reserved[2];
 319 }__attribute__((packed, aligned (8)));
 320
 321 struct ibmvfc_implicit_logout {
 322         struct ibmvfc_mad_common common;
 323         u64 old_scsi_id;
 324         u64 reserved[2];
 325 }__attribute__((packed, aligned (8)));
 326
 327 struct ibmvfc_tmf {
 328         struct ibmvfc_mad_common common;
 329         u64 scsi_id;
 330         struct scsi_lun lun;
 331         u32 flags;
 332 #define IBMVFC_TMF_ABORT_TASK           0x02
 333 #define IBMVFC_TMF_ABORT_TASK_SET       0x04
 334 #define IBMVFC_TMF_LUN_RESET            0x10
 335 #define IBMVFC_TMF_TGT_RESET            0x20
 336 #define IBMVFC_TMF_LUA_VALID            0x40
 337         u32 cancel_key;
 338         u32 my_cancel_key;
 339 #define IBMVFC_TMF_CANCEL_KEY           0x80000000
 340         u32 pad;
 341         u64 reserved[2];
 342 }__attribute__((packed, aligned (8)));
 343
 344 enum ibmvfc_fcp_rsp_info_codes {
 345         RSP_NO_FAILURE          = 0x00,
 346         RSP_TMF_REJECTED                = 0x04,
 347         RSP_TMF_FAILED          = 0x05,
 348         RSP_TMF_INVALID_LUN     = 0x09,
 349 };
 350
 351 struct ibmvfc_fcp_rsp_info {
 352         u16 reserved;
 353         u8 rsp_code;
 354         u8 reserved2[4];
 355 }__attribute__((packed, aligned (2)));
 356
 357 enum ibmvfc_fcp_rsp_flags {
 358         FCP_BIDI_RSP                    = 0x80,
 359         FCP_BIDI_READ_RESID_UNDER       = 0x40,
 360         FCP_BIDI_READ_RESID_OVER        = 0x20,
 361         FCP_CONF_REQ                    = 0x10,
 362         FCP_RESID_UNDER                 = 0x08,
 363         FCP_RESID_OVER                  = 0x04,
 364         FCP_SNS_LEN_VALID                       = 0x02,
 365         FCP_RSP_LEN_VALID                       = 0x01,
 366 };
 367
 368 union ibmvfc_fcp_rsp_data {
 369         struct ibmvfc_fcp_rsp_info info;
 370         u8 sense[SCSI_SENSE_BUFFERSIZE + sizeof(struct ibmvfc_fcp_rsp_info)];
 371 }__attribute__((packed, aligned (8)));
 372
 373 struct ibmvfc_fcp_rsp {
 374         u64 reserved;
 375         u16 retry_delay_timer;
 376         u8 flags;
 377         u8 scsi_status;
 378         u32 fcp_resid;
 379         u32 fcp_sense_len;
 380         u32 fcp_rsp_len;
 381         union ibmvfc_fcp_rsp_data data;
 382 }__attribute__((packed, aligned (8)));
 383
 384 enum ibmvfc_cmd_flags {
 385         IBMVFC_SCATTERLIST      = 0x0001,
 386         IBMVFC_NO_MEM_DESC      = 0x0002,
 387         IBMVFC_READ                     = 0x0004,
 388         IBMVFC_WRITE            = 0x0008,
 389         IBMVFC_TMF                      = 0x0080,
 390         IBMVFC_CLASS_3_ERR      = 0x0100,
 391 };
 392
 393 enum ibmvfc_fc_task_attr {
 394         IBMVFC_SIMPLE_TASK      = 0x00,
 395         IBMVFC_HEAD_OF_QUEUE    = 0x01,
 396         IBMVFC_ORDERED_TASK     = 0x02,
 397         IBMVFC_ACA_TASK         = 0x04,
 398 };
 399
 400 enum ibmvfc_fc_tmf_flags {
 401         IBMVFC_ABORT_TASK_SET   = 0x02,
 402         IBMVFC_LUN_RESET                = 0x10,
 403         IBMVFC_TARGET_RESET     = 0x20,
 404 };
 405
 406 struct ibmvfc_fcp_cmd_iu {
 407         struct scsi_lun lun;
 408         u8 crn;
 409         u8 pri_task_attr;
 410         u8 tmf_flags;
 411         u8 add_cdb_len;
 412 #define IBMVFC_RDDATA           0x02
 413 #define IBMVFC_WRDATA           0x01
 414         u8 cdb[IBMVFC_MAX_CDB_LEN];
 415         u32 xfer_len;
 416 }__attribute__((packed, aligned (4)));
 417
 418 struct ibmvfc_cmd {
 419         u64 task_tag;
 420         u32 frame_type;
 421         u32 payload_len;
 422         u32 resp_len;
 423         u32 adapter_resid;
 424         u16 status;
 425         u16 error;
 426         u16 flags;
 427         u16 response_flags;
 428 #define IBMVFC_ADAPTER_RESID_VALID      0x01
 429         u32 cancel_key;
 430         u32 exchange_id;
 431         struct srp_direct_buf ext_func;
 432         struct srp_direct_buf ioba;
 433         struct srp_direct_buf resp;
 434         u64 correlation;
 435         u64 tgt_scsi_id;
 436         u64 tag;
 437         u64 reserved3[2];
 438         struct ibmvfc_fcp_cmd_iu iu;
 439         struct ibmvfc_fcp_rsp rsp;
 440 }__attribute__((packed, aligned (8)));
 441
 442 struct ibmvfc_trace_start_entry {
 443         u32 xfer_len;
 444 }__attribute__((packed));
 445
 446 struct ibmvfc_trace_end_entry {
 447         u16 status;
 448         u16 error;
 449         u8 fcp_rsp_flags;
 450         u8 rsp_code;
 451         u8 scsi_status;
 452         u8 reserved;
 453 }__attribute__((packed));
 454
 455 struct ibmvfc_trace_entry {
 456         struct ibmvfc_event *evt;
 457         u32 time;
 458         u32 scsi_id;
 459         u32 lun;
 460         u8 fmt;
 461         u8 op_code;
 462         u8 tmf_flags;
 463         u8 type;
 464 #define IBMVFC_TRC_START        0x00
 465 #define IBMVFC_TRC_END          0xff
 466         union {
 467                 struct ibmvfc_trace_start_entry start;
 468                 struct ibmvfc_trace_end_entry end;
 469         } u;
 470 }__attribute__((packed, aligned (8)));
 471
 472 enum ibmvfc_crq_formats {
 473         IBMVFC_CMD_FORMAT               = 0x01,
 474         IBMVFC_ASYNC_EVENT      = 0x02,
 475         IBMVFC_MAD_FORMAT               = 0x04,
 476 };
 477
 478 enum ibmvfc_async_event {
 479         IBMVFC_AE_ELS_PLOGI             = 0x0001,
 480         IBMVFC_AE_ELS_LOGO              = 0x0002,
 481         IBMVFC_AE_ELS_PRLO              = 0x0004,
 482         IBMVFC_AE_SCN_NPORT             = 0x0008,
 483         IBMVFC_AE_SCN_GROUP             = 0x0010,
 484         IBMVFC_AE_SCN_DOMAIN            = 0x0020,
 485         IBMVFC_AE_SCN_FABRIC            = 0x0040,
 486         IBMVFC_AE_LINK_UP                       = 0x0080,
 487         IBMVFC_AE_LINK_DOWN             = 0x0100,
 488         IBMVFC_AE_LINK_DEAD             = 0x0200,
 489         IBMVFC_AE_HALT                  = 0x0400,
 490         IBMVFC_AE_RESUME                        = 0x0800,
 491         IBMVFC_AE_ADAPTER_FAILED        = 0x1000,
 492 };
 493
 494 struct ibmvfc_crq {
 495         u8 valid;
 496         u8 format;
 497         u8 reserved[6];
 498         u64 ioba;
 499 }__attribute__((packed, aligned (8)));
 500
 501 struct ibmvfc_crq_queue {
 502         struct ibmvfc_crq *msgs;
 503         int size, cur;
 504         dma_addr_t msg_token;
 505 };
 506
 507 struct ibmvfc_async_crq {
 508         u8 valid;
 509         u8 pad[3];
 510         u32 pad2;
 511         u64 event;
 512         u64 scsi_id;
 513         u64 wwpn;
 514         u64 node_name;
 515         u64 reserved;
 516 }__attribute__((packed, aligned (8)));
 517
 518 struct ibmvfc_async_crq_queue {
 519         struct ibmvfc_async_crq *msgs;
 520         int size, cur;
 521         dma_addr_t msg_token;
 522 };
 523
 524 union ibmvfc_iu {
 525         struct ibmvfc_mad_common mad_common;
 526         struct ibmvfc_npiv_login_mad npiv_login;
 527         struct ibmvfc_discover_targets discover_targets;
 528         struct ibmvfc_port_login plogi;
 529         struct ibmvfc_process_login prli;
 530         struct ibmvfc_query_tgt query_tgt;
 531         struct ibmvfc_implicit_logout implicit_logout;
 532         struct ibmvfc_tmf tmf;
 533         struct ibmvfc_cmd cmd;
 534 }__attribute__((packed, aligned (8)));
 535
 536 enum ibmvfc_target_action {
 537         IBMVFC_TGT_ACTION_NONE = 0,
 538         IBMVFC_TGT_ACTION_INIT,
 539         IBMVFC_TGT_ACTION_INIT_WAIT,
 540         IBMVFC_TGT_ACTION_ADD_RPORT,
 541         IBMVFC_TGT_ACTION_DEL_RPORT,
 542 };
 543
 544 struct ibmvfc_target {
 545         struct list_head queue;
 546         struct ibmvfc_host *vhost;
 547         u64 scsi_id;
 548         u64 new_scsi_id;
 549         struct fc_rport *rport;
 550         int target_id;
 551         enum ibmvfc_target_action action;
 552         int need_login;
 553         int init_retries;
 554         struct ibmvfc_service_parms service_parms;
 555         struct ibmvfc_service_parms service_parms_change;
 556         struct fc_rport_identifiers ids;
 557         void (*job_step) (struct ibmvfc_target *);
 558         struct kref kref;
 559 };
 560
 561 /* a unit of work for the hosting partition */
 562 struct ibmvfc_event {
 563         struct list_head queue;
 564         struct ibmvfc_host *vhost;
 565         struct ibmvfc_target *tgt;
 566         struct scsi_cmnd *cmnd;
 567         atomic_t free;
 568         union ibmvfc_iu *xfer_iu;
 569         void (*done) (struct ibmvfc_event *);
 570         struct ibmvfc_crq crq;
 571         union ibmvfc_iu iu;
 572         union ibmvfc_iu *sync_iu;
 573         struct srp_direct_buf *ext_list;
 574         dma_addr_t ext_list_token;
 575         struct completion comp;
 576         struct timer_list timer;
 577 };
 578
 579 /* a pool of event structs for use */
 580 struct ibmvfc_event_pool {
 581         struct ibmvfc_event *events;
 582         u32 size;
 583         union ibmvfc_iu *iu_storage;
 584         dma_addr_t iu_token;
 585 };
 586
 587 enum ibmvfc_host_action {
 588         IBMVFC_HOST_ACTION_NONE = 0,
 589         IBMVFC_HOST_ACTION_INIT,
 590         IBMVFC_HOST_ACTION_INIT_WAIT,
 591         IBMVFC_HOST_ACTION_QUERY,
 592         IBMVFC_HOST_ACTION_QUERY_TGTS,
 593         IBMVFC_HOST_ACTION_TGT_DEL,
 594         IBMVFC_HOST_ACTION_ALLOC_TGTS,
 595         IBMVFC_HOST_ACTION_TGT_INIT,
 596         IBMVFC_HOST_ACTION_TGT_ADD,
 597 };
 598
 599 enum ibmvfc_host_state {
 600         IBMVFC_NO_CRQ = 0,
 601         IBMVFC_INITIALIZING,
 602         IBMVFC_ACTIVE,
 603         IBMVFC_HALTED,
 604         IBMVFC_LINK_DOWN,
 605         IBMVFC_LINK_DEAD,
 606         IBMVFC_HOST_OFFLINE,
 607 };
 608
 609 struct ibmvfc_host {
 610         char name[8];
 611         struct list_head queue;
 612         struct Scsi_Host *host;
 613         enum ibmvfc_host_state state;
 614         enum ibmvfc_host_action action;
 615 #define IBMVFC_NUM_TRACE_INDEX_BITS             8
 616 #define IBMVFC_NUM_TRACE_ENTRIES                (1 << IBMVFC_NUM_TRACE_INDEX_BITS)
 617 #define IBMVFC_TRACE_SIZE       (sizeof(struct ibmvfc_trace_entry) * IBMVFC_NUM_TRACE_ENTRIES)
 618         struct ibmvfc_trace_entry *trace;
 619         u32 trace_index:IBMVFC_NUM_TRACE_INDEX_BITS;
 620         int num_targets;
 621         struct list_head targets;
 622         struct list_head sent;
 623         struct list_head free;
 624         struct device *dev;
 625         struct ibmvfc_event_pool pool;
 626         struct dma_pool *sg_pool;
 627         mempool_t *tgt_pool;
 628         struct ibmvfc_crq_queue crq;
 629         struct ibmvfc_async_crq_queue async_crq;
 630         struct ibmvfc_npiv_login login_info;
 631         union ibmvfc_npiv_login_data *login_buf;
 632         dma_addr_t login_buf_dma;
 633         int disc_buf_sz;
 634         int log_level;
 635         struct ibmvfc_discover_targets_buf *disc_buf;
 636         int task_set;
 637         int init_retries;
 638         int discovery_threads;
 639         int client_migrated;
 640         int reinit;
 641         int events_to_log;
 642 #define IBMVFC_AE_LINKUP        0x0001
 643 #define IBMVFC_AE_LINKDOWN      0x0002
 644 #define IBMVFC_AE_RSCN          0x0004
 645         dma_addr_t disc_buf_dma;
 646         unsigned int partition_number;
 647         char partition_name[97];
 648         void (*job_step) (struct ibmvfc_host *);
 649         struct task_struct *work_thread;
 650         wait_queue_head_t init_wait_q;
 651         wait_queue_head_t work_wait_q;
 652 };
 653
 654 #define DBG_CMD(CMD) do { if (ibmvfc_debug) CMD; } while (0)
 655
 656 #define tgt_dbg(t, fmt, ...)                    \
 657         DBG_CMD(dev_info((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__))
 658
 659 #define tgt_err(t, fmt, ...)            \
 660         dev_err((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__)
 661
 662 #define ibmvfc_dbg(vhost, ...) \
 663         DBG_CMD(dev_info((vhost)->dev, ##__VA_ARGS__))
 664
 665 #define ibmvfc_log(vhost, level, ...) \
 666         do { \
 667                 if (level >= (vhost)->log_level) \
 668                         dev_err((vhost)->dev, ##__VA_ARGS__); \
 669         } while (0)
 670
 671 #define ENTER DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Entering %s\n", __FUNCTION__))
 672 #define LEAVE DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Leaving %s\n", __FUNCTION__))
 673
 674 #ifdef CONFIG_SCSI_IBMVFC_TRACE
 675 #define ibmvfc_create_trace_file(kobj, attr) sysfs_create_bin_file(kobj, attr)
 676 #define ibmvfc_remove_trace_file(kobj, attr) sysfs_remove_bin_file(kobj, attr)
 677 #else
 678 #define ibmvfc_create_trace_file(kobj, attr) 0
 679 #define ibmvfc_remove_trace_file(kobj, attr) do { } while (0)
 680 #endif
 681
 682 #endif