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           "1.0.9"
  33 #define IBMVFC_DRIVER_DATE              "(August 5, 2010)"
  34
  35 #define IBMVFC_DEFAULT_TIMEOUT  60
  36 #define IBMVFC_ADISC_CANCEL_TIMEOUT     45
  37 #define IBMVFC_ADISC_TIMEOUT            15
  38 #define IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT        \
  39                 (IBMVFC_ADISC_TIMEOUT + IBMVFC_ADISC_CANCEL_TIMEOUT)
  40 #define IBMVFC_INIT_TIMEOUT             120
  41 #define IBMVFC_ABORT_TIMEOUT            8
  42 #define IBMVFC_ABORT_WAIT_TIMEOUT       40
  43 #define IBMVFC_MAX_REQUESTS_DEFAULT     100
  44
  45 #define IBMVFC_DEBUG                    0
  46 #define IBMVFC_MAX_TARGETS              1024
  47 #define IBMVFC_MAX_LUN                  0xffffffff
  48 #define IBMVFC_MAX_SECTORS              0xffffu
  49 #define IBMVFC_MAX_DISC_THREADS 4
  50 #define IBMVFC_TGT_MEMPOOL_SZ           64
  51 #define IBMVFC_MAX_CMDS_PER_LUN 64
  52 #define IBMVFC_MAX_HOST_INIT_RETRIES    6
  53 #define IBMVFC_MAX_TGT_INIT_RETRIES             3
  54 #define IBMVFC_DEV_LOSS_TMO             (5 * 60)
  55 #define IBMVFC_DEFAULT_LOG_LEVEL        2
  56 #define IBMVFC_MAX_CDB_LEN              16
  57
  58 /*
  59  * Ensure we have resources for ERP and initialization:
  60  * 1 for ERP
  61  * 1 for initialization
  62  * 1 for NPIV Logout
  63  * 2 for BSG passthru
  64  * 2 for each discovery thread
  65  */
  66 #define IBMVFC_NUM_INTERNAL_REQ (1 + 1 + 1 + 2 + (disc_threads * 2))
  67
  68 #define IBMVFC_MAD_SUCCESS              0x00
  69 #define IBMVFC_MAD_NOT_SUPPORTED        0xF1
  70 #define IBMVFC_MAD_FAILED               0xF7
  71 #define IBMVFC_MAD_DRIVER_FAILED        0xEE
  72 #define IBMVFC_MAD_CRQ_ERROR            0xEF
  73
  74 enum ibmvfc_crq_valid {
  75         IBMVFC_CRQ_CMD_RSP              = 0x80,
  76         IBMVFC_CRQ_INIT_RSP             = 0xC0,
  77         IBMVFC_CRQ_XPORT_EVENT          = 0xFF,
  78 };
  79
  80 enum ibmvfc_crq_format {
  81         IBMVFC_CRQ_INIT                 = 0x01,
  82         IBMVFC_CRQ_INIT_COMPLETE        = 0x02,
  83         IBMVFC_PARTITION_MIGRATED       = 0x06,
  84 };
  85
  86 enum ibmvfc_cmd_status_flags {
  87         IBMVFC_FABRIC_MAPPED            = 0x0001,
  88         IBMVFC_VIOS_FAILURE             = 0x0002,
  89         IBMVFC_FC_FAILURE                       = 0x0004,
  90         IBMVFC_FC_SCSI_ERROR            = 0x0008,
  91         IBMVFC_HW_EVENT_LOGGED          = 0x0010,
  92         IBMVFC_VIOS_LOGGED              = 0x0020,
  93 };
  94
  95 enum ibmvfc_fabric_mapped_errors {
  96         IBMVFC_UNABLE_TO_ESTABLISH      = 0x0001,
  97         IBMVFC_XPORT_FAULT              = 0x0002,
  98         IBMVFC_CMD_TIMEOUT              = 0x0003,
  99         IBMVFC_ENETDOWN                 = 0x0004,
 100         IBMVFC_HW_FAILURE                       = 0x0005,
 101         IBMVFC_LINK_DOWN_ERR            = 0x0006,
 102         IBMVFC_LINK_DEAD_ERR            = 0x0007,
 103         IBMVFC_UNABLE_TO_REGISTER       = 0x0008,
 104         IBMVFC_XPORT_BUSY                       = 0x000A,
 105         IBMVFC_XPORT_DEAD                       = 0x000B,
 106         IBMVFC_CONFIG_ERROR             = 0x000C,
 107         IBMVFC_NAME_SERVER_FAIL         = 0x000D,
 108         IBMVFC_LINK_HALTED              = 0x000E,
 109         IBMVFC_XPORT_GENERAL            = 0x8000,
 110 };
 111
 112 enum ibmvfc_vios_errors {
 113         IBMVFC_CRQ_FAILURE                      = 0x0001,
 114         IBMVFC_SW_FAILURE                               = 0x0002,
 115         IBMVFC_INVALID_PARAMETER                = 0x0003,
 116         IBMVFC_MISSING_PARAMETER                = 0x0004,
 117         IBMVFC_HOST_IO_BUS                      = 0x0005,
 118         IBMVFC_TRANS_CANCELLED                  = 0x0006,
 119         IBMVFC_TRANS_CANCELLED_IMPLICIT = 0x0007,
 120         IBMVFC_INSUFFICIENT_RESOURCE            = 0x0008,
 121         IBMVFC_PLOGI_REQUIRED                   = 0x0010,
 122         IBMVFC_COMMAND_FAILED                   = 0x8000,
 123 };
 124
 125 enum ibmvfc_mad_types {
 126         IBMVFC_NPIV_LOGIN               = 0x0001,
 127         IBMVFC_DISC_TARGETS     = 0x0002,
 128         IBMVFC_PORT_LOGIN               = 0x0004,
 129         IBMVFC_PROCESS_LOGIN    = 0x0008,
 130         IBMVFC_QUERY_TARGET     = 0x0010,
 131         IBMVFC_IMPLICIT_LOGOUT  = 0x0040,
 132         IBMVFC_PASSTHRU         = 0x0200,
 133         IBMVFC_TMF_MAD          = 0x0100,
 134         IBMVFC_NPIV_LOGOUT      = 0x0800,
 135 };
 136
 137 struct ibmvfc_mad_common {
 138         u32 version;
 139         u32 reserved;
 140         u32 opcode;
 141         u16 status;
 142         u16 length;
 143         u64 tag;
 144 }__attribute__((packed, aligned (8)));
 145
 146 struct ibmvfc_npiv_login_mad {
 147         struct ibmvfc_mad_common common;
 148         struct srp_direct_buf buffer;
 149 }__attribute__((packed, aligned (8)));
 150
 151 struct ibmvfc_npiv_logout_mad {
 152         struct ibmvfc_mad_common common;
 153 }__attribute__((packed, aligned (8)));
 154
 155 #define IBMVFC_MAX_NAME 256
 156
 157 struct ibmvfc_npiv_login {
 158         u32 ostype;
 159 #define IBMVFC_OS_LINUX 0x02
 160         u32 pad;
 161         u64 max_dma_len;
 162         u32 max_payload;
 163         u32 max_response;
 164         u32 partition_num;
 165         u32 vfc_frame_version;
 166         u16 fcp_version;
 167         u16 flags;
 168 #define IBMVFC_CLIENT_MIGRATED  0x01
 169 #define IBMVFC_FLUSH_ON_HALT            0x02
 170         u32 max_cmds;
 171         u64 capabilities;
 172 #define IBMVFC_CAN_MIGRATE              0x01
 173         u64 node_name;
 174         struct srp_direct_buf async;
 175         u8 partition_name[IBMVFC_MAX_NAME];
 176         u8 device_name[IBMVFC_MAX_NAME];
 177         u8 drc_name[IBMVFC_MAX_NAME];
 178         u64 reserved2[2];
 179 }__attribute__((packed, aligned (8)));
 180
 181 struct ibmvfc_common_svc_parms {
 182         u16 fcph_version;
 183         u16 b2b_credit;
 184         u16 features;
 185         u16 bb_rcv_sz; /* upper nibble is BB_SC_N */
 186         u32 ratov;
 187         u32 edtov;
 188 }__attribute__((packed, aligned (4)));
 189
 190 struct ibmvfc_service_parms {
 191         struct ibmvfc_common_svc_parms common;
 192         u8 port_name[8];
 193         u8 node_name[8];
 194         u32 class1_parms[4];
 195         u32 class2_parms[4];
 196         u32 class3_parms[4];
 197         u32 obsolete[4];
 198         u32 vendor_version[4];
 199         u32 services_avail[2];
 200         u32 ext_len;
 201         u32 reserved[30];
 202         u32 clk_sync_qos[2];
 203 }__attribute__((packed, aligned (4)));
 204
 205 struct ibmvfc_npiv_login_resp {
 206         u32 version;
 207         u16 status;
 208         u16 error;
 209         u32 flags;
 210 #define IBMVFC_NATIVE_FC                0x01
 211 #define IBMVFC_CAN_FLUSH_ON_HALT        0x08
 212         u32 reserved;
 213         u64 capabilities;
 214 #define IBMVFC_CAN_FLUSH_ON_HALT        0x08
 215         u32 max_cmds;
 216         u32 scsi_id_sz;
 217         u64 max_dma_len;
 218         u64 scsi_id;
 219         u64 port_name;
 220         u64 node_name;
 221         u64 link_speed;
 222         u8 partition_name[IBMVFC_MAX_NAME];
 223         u8 device_name[IBMVFC_MAX_NAME];
 224         u8 port_loc_code[IBMVFC_MAX_NAME];
 225         u8 drc_name[IBMVFC_MAX_NAME];
 226         struct ibmvfc_service_parms service_parms;
 227         u64 reserved2;
 228 }__attribute__((packed, aligned (8)));
 229
 230 union ibmvfc_npiv_login_data {
 231         struct ibmvfc_npiv_login login;
 232         struct ibmvfc_npiv_login_resp resp;
 233 }__attribute__((packed, aligned (8)));
 234
 235 struct ibmvfc_discover_targets_buf {
 236         u32 scsi_id[1];
 237 #define IBMVFC_DISC_TGT_SCSI_ID_MASK    0x00ffffff
 238 };
 239
 240 struct ibmvfc_discover_targets {
 241         struct ibmvfc_mad_common common;
 242         struct srp_direct_buf buffer;
 243         u32 flags;
 244         u16 status;
 245         u16 error;
 246         u32 bufflen;
 247         u32 num_avail;
 248         u32 num_written;
 249         u64 reserved[2];
 250 }__attribute__((packed, aligned (8)));
 251
 252 enum ibmvfc_fc_reason {
 253         IBMVFC_INVALID_ELS_CMD_CODE     = 0x01,
 254         IBMVFC_INVALID_VERSION          = 0x02,
 255         IBMVFC_LOGICAL_ERROR            = 0x03,
 256         IBMVFC_INVALID_CT_IU_SIZE       = 0x04,
 257         IBMVFC_LOGICAL_BUSY             = 0x05,
 258         IBMVFC_PROTOCOL_ERROR           = 0x07,
 259         IBMVFC_UNABLE_TO_PERFORM_REQ    = 0x09,
 260         IBMVFC_CMD_NOT_SUPPORTED        = 0x0B,
 261         IBMVFC_SERVER_NOT_AVAIL         = 0x0D,
 262         IBMVFC_CMD_IN_PROGRESS          = 0x0E,
 263         IBMVFC_VENDOR_SPECIFIC          = 0xFF,
 264 };
 265
 266 enum ibmvfc_fc_type {
 267         IBMVFC_FABRIC_REJECT    = 0x01,
 268         IBMVFC_PORT_REJECT      = 0x02,
 269         IBMVFC_LS_REJECT                = 0x03,
 270         IBMVFC_FABRIC_BUSY      = 0x04,
 271         IBMVFC_PORT_BUSY                = 0x05,
 272         IBMVFC_BASIC_REJECT     = 0x06,
 273 };
 274
 275 enum ibmvfc_gs_explain {
 276         IBMVFC_PORT_NAME_NOT_REG        = 0x02,
 277 };
 278
 279 struct ibmvfc_port_login {
 280         struct ibmvfc_mad_common common;
 281         u64 scsi_id;
 282         u16 reserved;
 283         u16 fc_service_class;
 284         u32 blksz;
 285         u32 hdr_per_blk;
 286         u16 status;
 287         u16 error;              /* also fc_reason */
 288         u16 fc_explain;
 289         u16 fc_type;
 290         u32 reserved2;
 291         struct ibmvfc_service_parms service_parms;
 292         struct ibmvfc_service_parms service_parms_change;
 293         u64 reserved3[2];
 294 }__attribute__((packed, aligned (8)));
 295
 296 struct ibmvfc_prli_svc_parms {
 297         u8 type;
 298 #define IBMVFC_SCSI_FCP_TYPE            0x08
 299         u8 type_ext;
 300         u16 flags;
 301 #define IBMVFC_PRLI_ORIG_PA_VALID                       0x8000
 302 #define IBMVFC_PRLI_RESP_PA_VALID                       0x4000
 303 #define IBMVFC_PRLI_EST_IMG_PAIR                        0x2000
 304         u32 orig_pa;
 305         u32 resp_pa;
 306         u32 service_parms;
 307 #define IBMVFC_PRLI_TASK_RETRY                  0x00000200
 308 #define IBMVFC_PRLI_RETRY                               0x00000100
 309 #define IBMVFC_PRLI_DATA_OVERLAY                        0x00000040
 310 #define IBMVFC_PRLI_INITIATOR_FUNC                      0x00000020
 311 #define IBMVFC_PRLI_TARGET_FUNC                 0x00000010
 312 #define IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED  0x00000002
 313 #define IBMVFC_PRLI_WR_FCP_XFER_RDY_DISABLED    0x00000001
 314 }__attribute__((packed, aligned (4)));
 315
 316 struct ibmvfc_process_login {
 317         struct ibmvfc_mad_common common;
 318         u64 scsi_id;
 319         struct ibmvfc_prli_svc_parms parms;
 320         u8 reserved[48];
 321         u16 status;
 322         u16 error;                      /* also fc_reason */
 323         u32 reserved2;
 324         u64 reserved3[2];
 325 }__attribute__((packed, aligned (8)));
 326
 327 struct ibmvfc_query_tgt {
 328         struct ibmvfc_mad_common common;
 329         u64 wwpn;
 330         u64 scsi_id;
 331         u16 status;
 332         u16 error;
 333         u16 fc_explain;
 334         u16 fc_type;
 335         u64 reserved[2];
 336 }__attribute__((packed, aligned (8)));
 337
 338 struct ibmvfc_implicit_logout {
 339         struct ibmvfc_mad_common common;
 340         u64 old_scsi_id;
 341         u64 reserved[2];
 342 }__attribute__((packed, aligned (8)));
 343
 344 struct ibmvfc_tmf {
 345         struct ibmvfc_mad_common common;
 346         u64 scsi_id;
 347         struct scsi_lun lun;
 348         u32 flags;
 349 #define IBMVFC_TMF_ABORT_TASK           0x02
 350 #define IBMVFC_TMF_ABORT_TASK_SET       0x04
 351 #define IBMVFC_TMF_LUN_RESET            0x10
 352 #define IBMVFC_TMF_TGT_RESET            0x20
 353 #define IBMVFC_TMF_LUA_VALID            0x40
 354         u32 cancel_key;
 355         u32 my_cancel_key;
 356         u32 pad;
 357         u64 reserved[2];
 358 }__attribute__((packed, aligned (8)));
 359
 360 enum ibmvfc_fcp_rsp_info_codes {
 361         RSP_NO_FAILURE          = 0x00,
 362         RSP_TMF_REJECTED                = 0x04,
 363         RSP_TMF_FAILED          = 0x05,
 364         RSP_TMF_INVALID_LUN     = 0x09,
 365 };
 366
 367 struct ibmvfc_fcp_rsp_info {
 368         u16 reserved;
 369         u8 rsp_code;
 370         u8 reserved2[4];
 371 }__attribute__((packed, aligned (2)));
 372
 373 enum ibmvfc_fcp_rsp_flags {
 374         FCP_BIDI_RSP                    = 0x80,
 375         FCP_BIDI_READ_RESID_UNDER       = 0x40,
 376         FCP_BIDI_READ_RESID_OVER        = 0x20,
 377         FCP_CONF_REQ                    = 0x10,
 378         FCP_RESID_UNDER                 = 0x08,
 379         FCP_RESID_OVER                  = 0x04,
 380         FCP_SNS_LEN_VALID                       = 0x02,
 381         FCP_RSP_LEN_VALID                       = 0x01,
 382 };
 383
 384 union ibmvfc_fcp_rsp_data {
 385         struct ibmvfc_fcp_rsp_info info;
 386         u8 sense[SCSI_SENSE_BUFFERSIZE + sizeof(struct ibmvfc_fcp_rsp_info)];
 387 }__attribute__((packed, aligned (8)));
 388
 389 struct ibmvfc_fcp_rsp {
 390         u64 reserved;
 391         u16 retry_delay_timer;
 392         u8 flags;
 393         u8 scsi_status;
 394         u32 fcp_resid;
 395         u32 fcp_sense_len;
 396         u32 fcp_rsp_len;
 397         union ibmvfc_fcp_rsp_data data;
 398 }__attribute__((packed, aligned (8)));
 399
 400 enum ibmvfc_cmd_flags {
 401         IBMVFC_SCATTERLIST      = 0x0001,
 402         IBMVFC_NO_MEM_DESC      = 0x0002,
 403         IBMVFC_READ                     = 0x0004,
 404         IBMVFC_WRITE            = 0x0008,
 405         IBMVFC_TMF                      = 0x0080,
 406         IBMVFC_CLASS_3_ERR      = 0x0100,
 407 };
 408
 409 enum ibmvfc_fc_task_attr {
 410         IBMVFC_SIMPLE_TASK      = 0x00,
 411         IBMVFC_HEAD_OF_QUEUE    = 0x01,
 412         IBMVFC_ORDERED_TASK     = 0x02,
 413         IBMVFC_ACA_TASK         = 0x04,
 414 };
 415
 416 enum ibmvfc_fc_tmf_flags {
 417         IBMVFC_ABORT_TASK_SET   = 0x02,
 418         IBMVFC_LUN_RESET                = 0x10,
 419         IBMVFC_TARGET_RESET     = 0x20,
 420 };
 421
 422 struct ibmvfc_fcp_cmd_iu {
 423         struct scsi_lun lun;
 424         u8 crn;
 425         u8 pri_task_attr;
 426         u8 tmf_flags;
 427         u8 add_cdb_len;
 428 #define IBMVFC_RDDATA           0x02
 429 #define IBMVFC_WRDATA           0x01
 430         u8 cdb[IBMVFC_MAX_CDB_LEN];
 431         u32 xfer_len;
 432 }__attribute__((packed, aligned (4)));
 433
 434 struct ibmvfc_cmd {
 435         u64 task_tag;
 436         u32 frame_type;
 437         u32 payload_len;
 438         u32 resp_len;
 439         u32 adapter_resid;
 440         u16 status;
 441         u16 error;
 442         u16 flags;
 443         u16 response_flags;
 444 #define IBMVFC_ADAPTER_RESID_VALID      0x01
 445         u32 cancel_key;
 446         u32 exchange_id;
 447         struct srp_direct_buf ext_func;
 448         struct srp_direct_buf ioba;
 449         struct srp_direct_buf resp;
 450         u64 correlation;
 451         u64 tgt_scsi_id;
 452         u64 tag;
 453         u64 reserved3[2];
 454         struct ibmvfc_fcp_cmd_iu iu;
 455         struct ibmvfc_fcp_rsp rsp;
 456 }__attribute__((packed, aligned (8)));
 457
 458 struct ibmvfc_passthru_fc_iu {
 459         u32 payload[7];
 460 #define IBMVFC_ADISC    0x52000000
 461         u32 response[7];
 462 };
 463
 464 struct ibmvfc_passthru_iu {
 465         u64 task_tag;
 466         u32 cmd_len;
 467         u32 rsp_len;
 468         u16 status;
 469         u16 error;
 470         u32 flags;
 471 #define IBMVFC_FC_ELS           0x01
 472 #define IBMVFC_FC_CT_IU         0x02
 473         u32 cancel_key;
 474 #define IBMVFC_PASSTHRU_CANCEL_KEY      0x80000000
 475 #define IBMVFC_INTERNAL_CANCEL_KEY      0x80000001
 476         u32 reserved;
 477         struct srp_direct_buf cmd;
 478         struct srp_direct_buf rsp;
 479         u64 correlation;
 480         u64 scsi_id;
 481         u64 tag;
 482         u64 reserved2[2];
 483 }__attribute__((packed, aligned (8)));
 484
 485 struct ibmvfc_passthru_mad {
 486         struct ibmvfc_mad_common common;
 487         struct srp_direct_buf cmd_ioba;
 488         struct ibmvfc_passthru_iu iu;
 489         struct ibmvfc_passthru_fc_iu fc_iu;
 490 }__attribute__((packed, aligned (8)));
 491
 492 struct ibmvfc_trace_start_entry {
 493         u32 xfer_len;
 494 }__attribute__((packed));
 495
 496 struct ibmvfc_trace_end_entry {
 497         u16 status;
 498         u16 error;
 499         u8 fcp_rsp_flags;
 500         u8 rsp_code;
 501         u8 scsi_status;
 502         u8 reserved;
 503 }__attribute__((packed));
 504
 505 struct ibmvfc_trace_entry {
 506         struct ibmvfc_event *evt;
 507         u32 time;
 508         u32 scsi_id;
 509         u32 lun;
 510         u8 fmt;
 511         u8 op_code;
 512         u8 tmf_flags;
 513         u8 type;
 514 #define IBMVFC_TRC_START        0x00
 515 #define IBMVFC_TRC_END          0xff
 516         union {
 517                 struct ibmvfc_trace_start_entry start;
 518                 struct ibmvfc_trace_end_entry end;
 519         } u;
 520 }__attribute__((packed, aligned (8)));
 521
 522 enum ibmvfc_crq_formats {
 523         IBMVFC_CMD_FORMAT               = 0x01,
 524         IBMVFC_ASYNC_EVENT      = 0x02,
 525         IBMVFC_MAD_FORMAT               = 0x04,
 526 };
 527
 528 enum ibmvfc_async_event {
 529         IBMVFC_AE_ELS_PLOGI             = 0x0001,
 530         IBMVFC_AE_ELS_LOGO              = 0x0002,
 531         IBMVFC_AE_ELS_PRLO              = 0x0004,
 532         IBMVFC_AE_SCN_NPORT             = 0x0008,
 533         IBMVFC_AE_SCN_GROUP             = 0x0010,
 534         IBMVFC_AE_SCN_DOMAIN            = 0x0020,
 535         IBMVFC_AE_SCN_FABRIC            = 0x0040,
 536         IBMVFC_AE_LINK_UP                       = 0x0080,
 537         IBMVFC_AE_LINK_DOWN             = 0x0100,
 538         IBMVFC_AE_LINK_DEAD             = 0x0200,
 539         IBMVFC_AE_HALT                  = 0x0400,
 540         IBMVFC_AE_RESUME                        = 0x0800,
 541         IBMVFC_AE_ADAPTER_FAILED        = 0x1000,
 542 };
 543
 544 struct ibmvfc_async_desc {
 545         const char *desc;
 546         enum ibmvfc_async_event ae;
 547         int log_level;
 548 };
 549
 550 struct ibmvfc_crq {
 551         volatile u8 valid;
 552         volatile u8 format;
 553         u8 reserved[6];
 554         volatile u64 ioba;
 555 }__attribute__((packed, aligned (8)));
 556
 557 struct ibmvfc_crq_queue {
 558         struct ibmvfc_crq *msgs;
 559         int size, cur;
 560         dma_addr_t msg_token;
 561 };
 562
 563 enum ibmvfc_ae_link_state {
 564         IBMVFC_AE_LS_LINK_UP            = 0x01,
 565         IBMVFC_AE_LS_LINK_BOUNCED       = 0x02,
 566         IBMVFC_AE_LS_LINK_DOWN          = 0x04,
 567         IBMVFC_AE_LS_LINK_DEAD          = 0x08,
 568 };
 569
 570 struct ibmvfc_async_crq {
 571         volatile u8 valid;
 572         u8 link_state;
 573         u8 pad[2];
 574         u32 pad2;
 575         volatile u64 event;
 576         volatile u64 scsi_id;
 577         volatile u64 wwpn;
 578         volatile u64 node_name;
 579         u64 reserved;
 580 }__attribute__((packed, aligned (8)));
 581
 582 struct ibmvfc_async_crq_queue {
 583         struct ibmvfc_async_crq *msgs;
 584         int size, cur;
 585         dma_addr_t msg_token;
 586 };
 587
 588 union ibmvfc_iu {
 589         struct ibmvfc_mad_common mad_common;
 590         struct ibmvfc_npiv_login_mad npiv_login;
 591         struct ibmvfc_npiv_logout_mad npiv_logout;
 592         struct ibmvfc_discover_targets discover_targets;
 593         struct ibmvfc_port_login plogi;
 594         struct ibmvfc_process_login prli;
 595         struct ibmvfc_query_tgt query_tgt;
 596         struct ibmvfc_implicit_logout implicit_logout;
 597         struct ibmvfc_tmf tmf;
 598         struct ibmvfc_cmd cmd;
 599         struct ibmvfc_passthru_mad passthru;
 600 }__attribute__((packed, aligned (8)));
 601
 602 enum ibmvfc_target_action {
 603         IBMVFC_TGT_ACTION_NONE = 0,
 604         IBMVFC_TGT_ACTION_INIT,
 605         IBMVFC_TGT_ACTION_INIT_WAIT,
 606         IBMVFC_TGT_ACTION_DEL_RPORT,
 607         IBMVFC_TGT_ACTION_DELETED_RPORT,
 608 };
 609
 610 struct ibmvfc_target {
 611         struct list_head queue;
 612         struct ibmvfc_host *vhost;
 613         u64 scsi_id;
 614         u64 new_scsi_id;
 615         struct fc_rport *rport;
 616         int target_id;
 617         enum ibmvfc_target_action action;
 618         int need_login;
 619         int add_rport;
 620         int init_retries;
 621         int logo_rcvd;
 622         u32 cancel_key;
 623         struct ibmvfc_service_parms service_parms;
 624         struct ibmvfc_service_parms service_parms_change;
 625         struct fc_rport_identifiers ids;
 626         void (*job_step) (struct ibmvfc_target *);
 627         struct timer_list timer;
 628         struct kref kref;
 629 };
 630
 631 /* a unit of work for the hosting partition */
 632 struct ibmvfc_event {
 633         struct list_head queue;
 634         struct ibmvfc_host *vhost;
 635         struct ibmvfc_target *tgt;
 636         struct scsi_cmnd *cmnd;
 637         atomic_t free;
 638         union ibmvfc_iu *xfer_iu;
 639         void (*done) (struct ibmvfc_event *);
 640         struct ibmvfc_crq crq;
 641         union ibmvfc_iu iu;
 642         union ibmvfc_iu *sync_iu;
 643         struct srp_direct_buf *ext_list;
 644         dma_addr_t ext_list_token;
 645         struct completion comp;
 646         struct completion *eh_comp;
 647         struct timer_list timer;
 648 };
 649
 650 /* a pool of event structs for use */
 651 struct ibmvfc_event_pool {
 652         struct ibmvfc_event *events;
 653         u32 size;
 654         union ibmvfc_iu *iu_storage;
 655         dma_addr_t iu_token;
 656 };
 657
 658 enum ibmvfc_host_action {
 659         IBMVFC_HOST_ACTION_NONE = 0,
 660         IBMVFC_HOST_ACTION_RESET,
 661         IBMVFC_HOST_ACTION_REENABLE,
 662         IBMVFC_HOST_ACTION_LOGO,
 663         IBMVFC_HOST_ACTION_LOGO_WAIT,
 664         IBMVFC_HOST_ACTION_INIT,
 665         IBMVFC_HOST_ACTION_INIT_WAIT,
 666         IBMVFC_HOST_ACTION_QUERY,
 667         IBMVFC_HOST_ACTION_QUERY_TGTS,
 668         IBMVFC_HOST_ACTION_TGT_DEL,
 669         IBMVFC_HOST_ACTION_ALLOC_TGTS,
 670         IBMVFC_HOST_ACTION_TGT_INIT,
 671         IBMVFC_HOST_ACTION_TGT_DEL_FAILED,
 672 };
 673
 674 enum ibmvfc_host_state {
 675         IBMVFC_NO_CRQ = 0,
 676         IBMVFC_INITIALIZING,
 677         IBMVFC_ACTIVE,
 678         IBMVFC_HALTED,
 679         IBMVFC_LINK_DOWN,
 680         IBMVFC_LINK_DEAD,
 681         IBMVFC_HOST_OFFLINE,
 682 };
 683
 684 struct ibmvfc_host {
 685         char name[8];
 686         struct list_head queue;
 687         struct Scsi_Host *host;
 688         enum ibmvfc_host_state state;
 689         enum ibmvfc_host_action action;
 690 #define IBMVFC_NUM_TRACE_INDEX_BITS             8
 691 #define IBMVFC_NUM_TRACE_ENTRIES                (1 << IBMVFC_NUM_TRACE_INDEX_BITS)
 692 #define IBMVFC_TRACE_SIZE       (sizeof(struct ibmvfc_trace_entry) * IBMVFC_NUM_TRACE_ENTRIES)
 693         struct ibmvfc_trace_entry *trace;
 694         u32 trace_index:IBMVFC_NUM_TRACE_INDEX_BITS;
 695         int num_targets;
 696         struct list_head targets;
 697         struct list_head sent;
 698         struct list_head free;
 699         struct device *dev;
 700         struct ibmvfc_event_pool pool;
 701         struct dma_pool *sg_pool;
 702         mempool_t *tgt_pool;
 703         struct ibmvfc_crq_queue crq;
 704         struct ibmvfc_async_crq_queue async_crq;
 705         struct ibmvfc_npiv_login login_info;
 706         union ibmvfc_npiv_login_data *login_buf;
 707         dma_addr_t login_buf_dma;
 708         int disc_buf_sz;
 709         int log_level;
 710         struct ibmvfc_discover_targets_buf *disc_buf;
 711         struct mutex passthru_mutex;
 712         int task_set;
 713         int init_retries;
 714         int discovery_threads;
 715         int abort_threads;
 716         int client_migrated;
 717         int reinit;
 718         int delay_init;
 719         int scan_complete;
 720         int logged_in;
 721         int aborting_passthru;
 722         int events_to_log;
 723 #define IBMVFC_AE_LINKUP        0x0001
 724 #define IBMVFC_AE_LINKDOWN      0x0002
 725 #define IBMVFC_AE_RSCN          0x0004
 726         dma_addr_t disc_buf_dma;
 727         unsigned int partition_number;
 728         char partition_name[97];
 729         void (*job_step) (struct ibmvfc_host *);
 730         struct task_struct *work_thread;
 731         struct tasklet_struct tasklet;
 732         struct work_struct rport_add_work_q;
 733         wait_queue_head_t init_wait_q;
 734         wait_queue_head_t work_wait_q;
 735 };
 736
 737 #define DBG_CMD(CMD) do { if (ibmvfc_debug) CMD; } while (0)
 738
 739 #define tgt_dbg(t, fmt, ...)                    \
 740         DBG_CMD(dev_info((t)->vhost->dev, "%llX: " fmt, (t)->scsi_id, ##__VA_ARGS__))
 741
 742 #define tgt_info(t, fmt, ...)           \
 743         dev_info((t)->vhost->dev, "%llX: " fmt, (t)->scsi_id, ##__VA_ARGS__)
 744
 745 #define tgt_err(t, fmt, ...)            \
 746         dev_err((t)->vhost->dev, "%llX: " fmt, (t)->scsi_id, ##__VA_ARGS__)
 747
 748 #define tgt_log(t, level, fmt, ...) \
 749         do { \
 750                 if ((t)->vhost->log_level >= level) \
 751                         tgt_err(t, fmt, ##__VA_ARGS__); \
 752         } while (0)
 753
 754 #define ibmvfc_dbg(vhost, ...) \
 755         DBG_CMD(dev_info((vhost)->dev, ##__VA_ARGS__))
 756
 757 #define ibmvfc_log(vhost, level, ...) \
 758         do { \
 759                 if ((vhost)->log_level >= level) \
 760                         dev_err((vhost)->dev, ##__VA_ARGS__); \
 761         } while (0)
 762
 763 #define ENTER DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Entering %s\n", __func__))
 764 #define LEAVE DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Leaving %s\n", __func__))
 765
 766 #ifdef CONFIG_SCSI_IBMVFC_TRACE
 767 #define ibmvfc_create_trace_file(kobj, attr) sysfs_create_bin_file(kobj, attr)
 768 #define ibmvfc_remove_trace_file(kobj, attr) sysfs_remove_bin_file(kobj, attr)
 769 #else
 770 #define ibmvfc_create_trace_file(kobj, attr) 0
 771 #define ibmvfc_remove_trace_file(kobj, attr) do { } while (0)
 772 #endif
 773
 774 #endif