drivers/scsi/ibmvscsi/ibmvfc.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * ibmvfc.h -- driver for IBM Power Virtual Fibre Channel Adapter
   4  *
   5  * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
   6  *
   7  * Copyright (C) IBM Corporation, 2008
   8  */
   9
  10 #ifndef _IBMVFC_H
  11 #define _IBMVFC_H
  12
  13 #include <linux/list.h>
  14 #include <linux/types.h>
  15 #include <scsi/viosrp.h>
  16
  17 #define IBMVFC_NAME     "ibmvfc"
  18 #define IBMVFC_DRIVER_VERSION           "1.0.11"
  19 #define IBMVFC_DRIVER_DATE              "(April 12, 2013)"
  20
  21 #define IBMVFC_DEFAULT_TIMEOUT  60
  22 #define IBMVFC_ADISC_CANCEL_TIMEOUT     45
  23 #define IBMVFC_ADISC_TIMEOUT            15
  24 #define IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT        \
  25                 (IBMVFC_ADISC_TIMEOUT + IBMVFC_ADISC_CANCEL_TIMEOUT)
  26 #define IBMVFC_INIT_TIMEOUT             120
  27 #define IBMVFC_ABORT_TIMEOUT            8
  28 #define IBMVFC_ABORT_WAIT_TIMEOUT       40
  29 #define IBMVFC_MAX_REQUESTS_DEFAULT     100
  30 #define IBMVFC_SCSI_QDEPTH              128
  31
  32 #define IBMVFC_DEBUG                    0
  33 #define IBMVFC_MAX_TARGETS              1024
  34 #define IBMVFC_MAX_LUN                  0xffffffff
  35 #define IBMVFC_MAX_SECTORS              0xffffu
  36 #define IBMVFC_MAX_DISC_THREADS 4
  37 #define IBMVFC_TGT_MEMPOOL_SZ           64
  38 #define IBMVFC_MAX_CMDS_PER_LUN 64
  39 #define IBMVFC_MAX_HOST_INIT_RETRIES    6
  40 #define IBMVFC_MAX_TGT_INIT_RETRIES             3
  41 #define IBMVFC_DEV_LOSS_TMO             (5 * 60)
  42 #define IBMVFC_DEFAULT_LOG_LEVEL        2
  43 #define IBMVFC_MAX_CDB_LEN              16
  44 #define IBMVFC_CLS3_ERROR               0
  45 #define IBMVFC_MQ                       1
  46 #define IBMVFC_SCSI_CHANNELS            8
  47 #define IBMVFC_MAX_SCSI_QUEUES          16
  48 #define IBMVFC_SCSI_HW_QUEUES           8
  49 #define IBMVFC_MIG_NO_SUB_TO_CRQ        0
  50 #define IBMVFC_MIG_NO_N_TO_M            0
  51
  52 /*
  53  * Ensure we have resources for ERP and initialization:
  54  * 1 for ERP
  55  * 1 for initialization
  56  * 1 for NPIV Logout
  57  * 2 for BSG passthru
  58  * 2 for each discovery thread
  59  */
  60 #define IBMVFC_NUM_INTERNAL_REQ (1 + 1 + 1 + 2 + (disc_threads * 2))
  61 /* Reserved suset of events for cancelling channelized IO commands */
  62 #define IBMVFC_NUM_INTERNAL_SUBQ_REQ 4
  63
  64 #define IBMVFC_MAD_SUCCESS              0x00
  65 #define IBMVFC_MAD_NOT_SUPPORTED        0xF1
  66 #define IBMVFC_MAD_VERSION_NOT_SUPP     0xF2
  67 #define IBMVFC_MAD_FAILED               0xF7
  68 #define IBMVFC_MAD_DRIVER_FAILED        0xEE
  69 #define IBMVFC_MAD_CRQ_ERROR            0xEF
  70
  71 enum ibmvfc_crq_valid {
  72         IBMVFC_CRQ_CMD_RSP              = 0x80,
  73         IBMVFC_CRQ_INIT_RSP             = 0xC0,
  74         IBMVFC_CRQ_XPORT_EVENT          = 0xFF,
  75 };
  76
  77 enum ibmvfc_crq_init_msg {
  78         IBMVFC_CRQ_INIT                 = 0x01,
  79         IBMVFC_CRQ_INIT_COMPLETE        = 0x02,
  80 };
  81
  82 enum ibmvfc_crq_xport_evts {
  83         IBMVFC_PARTNER_FAILED           = 0x01,
  84         IBMVFC_PARTNER_DEREGISTER       = 0x02,
  85         IBMVFC_PARTITION_MIGRATED       = 0x06,
  86 };
  87
  88 enum ibmvfc_cmd_status_flags {
  89         IBMVFC_FABRIC_MAPPED            = 0x0001,
  90         IBMVFC_VIOS_FAILURE             = 0x0002,
  91         IBMVFC_FC_FAILURE                       = 0x0004,
  92         IBMVFC_FC_SCSI_ERROR            = 0x0008,
  93         IBMVFC_HW_EVENT_LOGGED          = 0x0010,
  94         IBMVFC_VIOS_LOGGED              = 0x0020,
  95 };
  96
  97 enum ibmvfc_fabric_mapped_errors {
  98         IBMVFC_UNABLE_TO_ESTABLISH      = 0x0001,
  99         IBMVFC_XPORT_FAULT              = 0x0002,
 100         IBMVFC_CMD_TIMEOUT              = 0x0003,
 101         IBMVFC_ENETDOWN                 = 0x0004,
 102         IBMVFC_HW_FAILURE                       = 0x0005,
 103         IBMVFC_LINK_DOWN_ERR            = 0x0006,
 104         IBMVFC_LINK_DEAD_ERR            = 0x0007,
 105         IBMVFC_UNABLE_TO_REGISTER       = 0x0008,
 106         IBMVFC_XPORT_BUSY                       = 0x000A,
 107         IBMVFC_XPORT_DEAD                       = 0x000B,
 108         IBMVFC_CONFIG_ERROR             = 0x000C,
 109         IBMVFC_NAME_SERVER_FAIL         = 0x000D,
 110         IBMVFC_LINK_HALTED              = 0x000E,
 111         IBMVFC_XPORT_GENERAL            = 0x8000,
 112 };
 113
 114 enum ibmvfc_vios_errors {
 115         IBMVFC_CRQ_FAILURE                      = 0x0001,
 116         IBMVFC_SW_FAILURE                               = 0x0002,
 117         IBMVFC_INVALID_PARAMETER                = 0x0003,
 118         IBMVFC_MISSING_PARAMETER                = 0x0004,
 119         IBMVFC_HOST_IO_BUS                      = 0x0005,
 120         IBMVFC_TRANS_CANCELLED                  = 0x0006,
 121         IBMVFC_TRANS_CANCELLED_IMPLICIT = 0x0007,
 122         IBMVFC_INSUFFICIENT_RESOURCE            = 0x0008,
 123         IBMVFC_PLOGI_REQUIRED                   = 0x0010,
 124         IBMVFC_COMMAND_FAILED                   = 0x8000,
 125 };
 126
 127 enum ibmvfc_mad_types {
 128         IBMVFC_NPIV_LOGIN               = 0x0001,
 129         IBMVFC_DISC_TARGETS     = 0x0002,
 130         IBMVFC_PORT_LOGIN               = 0x0004,
 131         IBMVFC_PROCESS_LOGIN    = 0x0008,
 132         IBMVFC_QUERY_TARGET     = 0x0010,
 133         IBMVFC_MOVE_LOGIN               = 0x0020,
 134         IBMVFC_IMPLICIT_LOGOUT  = 0x0040,
 135         IBMVFC_PASSTHRU         = 0x0200,
 136         IBMVFC_TMF_MAD          = 0x0100,
 137         IBMVFC_NPIV_LOGOUT      = 0x0800,
 138         IBMVFC_CHANNEL_ENQUIRY  = 0x1000,
 139         IBMVFC_CHANNEL_SETUP    = 0x2000,
 140         IBMVFC_CONNECTION_INFO  = 0x4000,
 141 };
 142
 143 struct ibmvfc_mad_common {
 144         __be32 version;
 145         __be32 reserved;
 146         __be32 opcode;
 147         __be16 status;
 148         __be16 length;
 149         __be64 tag;
 150 } __packed __aligned(8);
 151
 152 struct ibmvfc_npiv_login_mad {
 153         struct ibmvfc_mad_common common;
 154         struct srp_direct_buf buffer;
 155 } __packed __aligned(8);
 156
 157 struct ibmvfc_npiv_logout_mad {
 158         struct ibmvfc_mad_common common;
 159 } __packed __aligned(8);
 160
 161 #define IBMVFC_MAX_NAME 256
 162
 163 struct ibmvfc_npiv_login {
 164         __be32 ostype;
 165 #define IBMVFC_OS_LINUX 0x02
 166         __be32 pad;
 167         __be64 max_dma_len;
 168         __be32 max_payload;
 169         __be32 max_response;
 170         __be32 partition_num;
 171         __be32 vfc_frame_version;
 172         __be16 fcp_version;
 173         __be16 flags;
 174 #define IBMVFC_CLIENT_MIGRATED  0x01
 175 #define IBMVFC_FLUSH_ON_HALT            0x02
 176         __be32 max_cmds;
 177         __be64 capabilities;
 178 #define IBMVFC_CAN_MIGRATE              0x01
 179 #define IBMVFC_CAN_USE_CHANNELS         0x02
 180 #define IBMVFC_CAN_HANDLE_FPIN          0x04
 181 #define IBMVFC_CAN_USE_MAD_VERSION      0x08
 182 #define IBMVFC_CAN_SEND_VF_WWPN         0x10
 183         __be64 node_name;
 184         struct srp_direct_buf async;
 185         u8 partition_name[IBMVFC_MAX_NAME];
 186         u8 device_name[IBMVFC_MAX_NAME];
 187         u8 drc_name[IBMVFC_MAX_NAME];
 188         __be64 reserved2[2];
 189 } __packed __aligned(8);
 190
 191 struct ibmvfc_common_svc_parms {
 192         __be16 fcph_version;
 193         __be16 b2b_credit;
 194         __be16 features;
 195         __be16 bb_rcv_sz; /* upper nibble is BB_SC_N */
 196         __be32 ratov;
 197         __be32 edtov;
 198 } __packed __aligned(4);
 199
 200 struct ibmvfc_service_parms {
 201         struct ibmvfc_common_svc_parms common;
 202         u8 port_name[8];
 203         u8 node_name[8];
 204         __be32 class1_parms[4];
 205         __be32 class2_parms[4];
 206         __be32 class3_parms[4];
 207         __be32 obsolete[4];
 208         __be32 vendor_version[4];
 209         __be32 services_avail[2];
 210         __be32 ext_len;
 211         __be32 reserved[30];
 212         __be32 clk_sync_qos[2];
 213         __be32 reserved2;
 214 } __packed __aligned(4);
 215
 216 struct ibmvfc_npiv_login_resp {
 217         __be32 version;
 218         __be16 status;
 219         __be16 error;
 220         __be32 flags;
 221 #define IBMVFC_NATIVE_FC                0x01
 222         __be32 reserved;
 223         __be64 capabilities;
 224 #define IBMVFC_CAN_FLUSH_ON_HALT        0x08
 225 #define IBMVFC_CAN_SUPPRESS_ABTS        0x10
 226 #define IBMVFC_MAD_VERSION_CAP          0x20
 227 #define IBMVFC_HANDLE_VF_WWPN           0x40
 228 #define IBMVFC_CAN_SUPPORT_CHANNELS     0x80
 229         __be32 max_cmds;
 230         __be32 scsi_id_sz;
 231         __be64 max_dma_len;
 232         __be64 scsi_id;
 233         __be64 port_name;
 234         __be64 node_name;
 235         __be64 link_speed;
 236         u8 partition_name[IBMVFC_MAX_NAME];
 237         u8 device_name[IBMVFC_MAX_NAME];
 238         u8 port_loc_code[IBMVFC_MAX_NAME];
 239         u8 drc_name[IBMVFC_MAX_NAME];
 240         struct ibmvfc_service_parms service_parms;
 241         __be64 reserved2;
 242 } __packed __aligned(8);
 243
 244 union ibmvfc_npiv_login_data {
 245         struct ibmvfc_npiv_login login;
 246         struct ibmvfc_npiv_login_resp resp;
 247 } __packed __aligned(8);
 248
 249 struct ibmvfc_discover_targets_entry {
 250         __be32 scsi_id;
 251         __be32 pad;
 252         __be64 wwpn;
 253 #define IBMVFC_DISC_TGT_SCSI_ID_MASK    0x00ffffff
 254 } __packed __aligned(8);
 255
 256 struct ibmvfc_discover_targets {
 257         struct ibmvfc_mad_common common;
 258         struct srp_direct_buf buffer;
 259         __be32 flags;
 260 #define IBMVFC_DISC_TGT_PORT_ID_WWPN_LIST       0x02
 261         __be16 status;
 262         __be16 error;
 263         __be32 bufflen;
 264         __be32 num_avail;
 265         __be32 num_written;
 266         __be64 reserved[2];
 267 } __packed __aligned(8);
 268
 269 enum ibmvfc_fc_reason {
 270         IBMVFC_INVALID_ELS_CMD_CODE     = 0x01,
 271         IBMVFC_INVALID_VERSION          = 0x02,
 272         IBMVFC_LOGICAL_ERROR            = 0x03,
 273         IBMVFC_INVALID_CT_IU_SIZE       = 0x04,
 274         IBMVFC_LOGICAL_BUSY             = 0x05,
 275         IBMVFC_PROTOCOL_ERROR           = 0x07,
 276         IBMVFC_UNABLE_TO_PERFORM_REQ    = 0x09,
 277         IBMVFC_CMD_NOT_SUPPORTED        = 0x0B,
 278         IBMVFC_SERVER_NOT_AVAIL         = 0x0D,
 279         IBMVFC_CMD_IN_PROGRESS          = 0x0E,
 280         IBMVFC_VENDOR_SPECIFIC          = 0xFF,
 281 };
 282
 283 enum ibmvfc_fc_type {
 284         IBMVFC_FABRIC_REJECT    = 0x01,
 285         IBMVFC_PORT_REJECT      = 0x02,
 286         IBMVFC_LS_REJECT                = 0x03,
 287         IBMVFC_FABRIC_BUSY      = 0x04,
 288         IBMVFC_PORT_BUSY                = 0x05,
 289         IBMVFC_BASIC_REJECT     = 0x06,
 290 };
 291
 292 enum ibmvfc_gs_explain {
 293         IBMVFC_PORT_NAME_NOT_REG        = 0x02,
 294 };
 295
 296 struct ibmvfc_port_login {
 297         struct ibmvfc_mad_common common;
 298         __be64 scsi_id;
 299         __be16 reserved;
 300         __be16 fc_service_class;
 301         __be32 blksz;
 302         __be32 hdr_per_blk;
 303         __be16 status;
 304         __be16 error;           /* also fc_reason */
 305         __be16 fc_explain;
 306         __be16 fc_type;
 307         __be32 reserved2;
 308         struct ibmvfc_service_parms service_parms;
 309         struct ibmvfc_service_parms service_parms_change;
 310         __be64 target_wwpn;
 311         __be64 reserved3[2];
 312 } __packed __aligned(8);
 313
 314 struct ibmvfc_move_login {
 315         struct ibmvfc_mad_common common;
 316         __be64 old_scsi_id;
 317         __be64 new_scsi_id;
 318         __be64 wwpn;
 319         __be64 node_name;
 320         __be32 flags;
 321 #define IBMVFC_MOVE_LOGIN_IMPLICIT_OLD_FAILED   0x01
 322 #define IBMVFC_MOVE_LOGIN_IMPLICIT_NEW_FAILED   0x02
 323 #define IBMVFC_MOVE_LOGIN_PORT_LOGIN_FAILED     0x04
 324         __be32 reserved;
 325         struct ibmvfc_service_parms service_parms;
 326         struct ibmvfc_service_parms service_parms_change;
 327         __be32 reserved2;
 328         __be16 service_class;
 329         __be16 vios_flags;
 330 #define IBMVFC_MOVE_LOGIN_VF_NOT_SENT_ADAPTER   0x01
 331         __be64 reserved3;
 332 } __packed __aligned(8);
 333
 334 struct ibmvfc_prli_svc_parms {
 335         u8 type;
 336 #define IBMVFC_SCSI_FCP_TYPE            0x08
 337         u8 type_ext;
 338         __be16 flags;
 339 #define IBMVFC_PRLI_ORIG_PA_VALID                       0x8000
 340 #define IBMVFC_PRLI_RESP_PA_VALID                       0x4000
 341 #define IBMVFC_PRLI_EST_IMG_PAIR                        0x2000
 342         __be32 orig_pa;
 343         __be32 resp_pa;
 344         __be32 service_parms;
 345 #define IBMVFC_PRLI_TASK_RETRY                  0x00000200
 346 #define IBMVFC_PRLI_RETRY                               0x00000100
 347 #define IBMVFC_PRLI_DATA_OVERLAY                        0x00000040
 348 #define IBMVFC_PRLI_INITIATOR_FUNC                      0x00000020
 349 #define IBMVFC_PRLI_TARGET_FUNC                 0x00000010
 350 #define IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED  0x00000002
 351 #define IBMVFC_PRLI_WR_FCP_XFER_RDY_DISABLED    0x00000001
 352 } __packed __aligned(4);
 353
 354 struct ibmvfc_process_login {
 355         struct ibmvfc_mad_common common;
 356         __be64 scsi_id;
 357         struct ibmvfc_prli_svc_parms parms;
 358         u8 reserved[48];
 359         __be16 status;
 360         __be16 error;                   /* also fc_reason */
 361         __be32 reserved2;
 362         __be64 target_wwpn;
 363         __be64 reserved3[2];
 364 } __packed __aligned(8);
 365
 366 struct ibmvfc_query_tgt {
 367         struct ibmvfc_mad_common common;
 368         __be64 wwpn;
 369         __be64 scsi_id;
 370         __be16 status;
 371         __be16 error;
 372         __be16 fc_explain;
 373         __be16 fc_type;
 374         __be64 reserved[2];
 375 } __packed __aligned(8);
 376
 377 struct ibmvfc_implicit_logout {
 378         struct ibmvfc_mad_common common;
 379         __be64 old_scsi_id;
 380         __be64 reserved[2];
 381 } __packed __aligned(8);
 382
 383 struct ibmvfc_tmf {
 384         struct ibmvfc_mad_common common;
 385         __be64 scsi_id;
 386         struct scsi_lun lun;
 387         __be32 flags;
 388 #define IBMVFC_TMF_ABORT_TASK           0x02
 389 #define IBMVFC_TMF_ABORT_TASK_SET       0x04
 390 #define IBMVFC_TMF_LUN_RESET            0x10
 391 #define IBMVFC_TMF_TGT_RESET            0x20
 392 #define IBMVFC_TMF_LUA_VALID            0x40
 393 #define IBMVFC_TMF_SUPPRESS_ABTS        0x80
 394         __be32 cancel_key;
 395         __be32 my_cancel_key;
 396         __be32 pad;
 397         __be64 target_wwpn;
 398         __be64 task_tag;
 399         __be64 reserved[2];
 400 } __packed __aligned(8);
 401
 402 enum ibmvfc_fcp_rsp_info_codes {
 403         RSP_NO_FAILURE          = 0x00,
 404         RSP_TMF_REJECTED                = 0x04,
 405         RSP_TMF_FAILED          = 0x05,
 406         RSP_TMF_INVALID_LUN     = 0x09,
 407 };
 408
 409 struct ibmvfc_fcp_rsp_info {
 410         u8 reserved[3];
 411         u8 rsp_code;
 412         u8 reserved2[4];
 413 } __packed __aligned(2);
 414
 415 enum ibmvfc_fcp_rsp_flags {
 416         FCP_BIDI_RSP                    = 0x80,
 417         FCP_BIDI_READ_RESID_UNDER       = 0x40,
 418         FCP_BIDI_READ_RESID_OVER        = 0x20,
 419         FCP_CONF_REQ                    = 0x10,
 420         FCP_RESID_UNDER                 = 0x08,
 421         FCP_RESID_OVER                  = 0x04,
 422         FCP_SNS_LEN_VALID                       = 0x02,
 423         FCP_RSP_LEN_VALID                       = 0x01,
 424 };
 425
 426 union ibmvfc_fcp_rsp_data {
 427         struct ibmvfc_fcp_rsp_info info;
 428         u8 sense[SCSI_SENSE_BUFFERSIZE + sizeof(struct ibmvfc_fcp_rsp_info)];
 429 } __packed __aligned(8);
 430
 431 struct ibmvfc_fcp_rsp {
 432         __be64 reserved;
 433         __be16 retry_delay_timer;
 434         u8 flags;
 435         u8 scsi_status;
 436         __be32 fcp_resid;
 437         __be32 fcp_sense_len;
 438         __be32 fcp_rsp_len;
 439         union ibmvfc_fcp_rsp_data data;
 440 } __packed __aligned(8);
 441
 442 enum ibmvfc_cmd_flags {
 443         IBMVFC_SCATTERLIST      = 0x0001,
 444         IBMVFC_NO_MEM_DESC      = 0x0002,
 445         IBMVFC_READ                     = 0x0004,
 446         IBMVFC_WRITE            = 0x0008,
 447         IBMVFC_TMF                      = 0x0080,
 448         IBMVFC_CLASS_3_ERR      = 0x0100,
 449 };
 450
 451 enum ibmvfc_fc_task_attr {
 452         IBMVFC_SIMPLE_TASK      = 0x00,
 453         IBMVFC_HEAD_OF_QUEUE    = 0x01,
 454         IBMVFC_ORDERED_TASK     = 0x02,
 455         IBMVFC_ACA_TASK         = 0x04,
 456 };
 457
 458 enum ibmvfc_fc_tmf_flags {
 459         IBMVFC_ABORT_TASK_SET   = 0x02,
 460         IBMVFC_LUN_RESET                = 0x10,
 461         IBMVFC_TARGET_RESET     = 0x20,
 462 };
 463
 464 struct ibmvfc_fcp_cmd_iu {
 465         struct scsi_lun lun;
 466         u8 crn;
 467         u8 pri_task_attr;
 468         u8 tmf_flags;
 469         u8 add_cdb_len;
 470 #define IBMVFC_RDDATA           0x02
 471 #define IBMVFC_WRDATA           0x01
 472         u8 cdb[IBMVFC_MAX_CDB_LEN];
 473         __be32 xfer_len;
 474 } __packed __aligned(4);
 475
 476 struct ibmvfc_cmd {
 477         __be64 task_tag;
 478         __be32 frame_type;
 479         __be32 payload_len;
 480         __be32 resp_len;
 481         __be32 adapter_resid;
 482         __be16 status;
 483         __be16 error;
 484         __be16 flags;
 485         __be16 response_flags;
 486 #define IBMVFC_ADAPTER_RESID_VALID      0x01
 487         __be32 cancel_key;
 488         __be32 exchange_id;
 489         struct srp_direct_buf ext_func;
 490         struct srp_direct_buf ioba;
 491         struct srp_direct_buf resp;
 492         __be64 correlation;
 493         __be64 tgt_scsi_id;
 494         __be64 tag;
 495         __be64 target_wwpn;
 496         __be64 reserved3;
 497         union {
 498                 struct {
 499                         struct ibmvfc_fcp_cmd_iu iu;
 500                         struct ibmvfc_fcp_rsp rsp;
 501                 } v1;
 502                 struct {
 503                         __be64 reserved4;
 504                         struct ibmvfc_fcp_cmd_iu iu;
 505                         struct ibmvfc_fcp_rsp rsp;
 506                 } v2;
 507         };
 508 } __packed __aligned(8);
 509
 510 struct ibmvfc_passthru_fc_iu {
 511         __be32 payload[7];
 512 #define IBMVFC_ADISC    0x52000000
 513         __be32 response[7];
 514 };
 515
 516 struct ibmvfc_passthru_iu {
 517         __be64 task_tag;
 518         __be32 cmd_len;
 519         __be32 rsp_len;
 520         __be16 status;
 521         __be16 error;
 522         __be32 flags;
 523 #define IBMVFC_FC_ELS           0x01
 524 #define IBMVFC_FC_CT_IU         0x02
 525         __be32 cancel_key;
 526 #define IBMVFC_PASSTHRU_CANCEL_KEY      0x80000000
 527 #define IBMVFC_INTERNAL_CANCEL_KEY      0x80000001
 528         __be32 reserved;
 529         struct srp_direct_buf cmd;
 530         struct srp_direct_buf rsp;
 531         __be64 correlation;
 532         __be64 scsi_id;
 533         __be64 tag;
 534         __be64 target_wwpn;
 535         __be64 reserved2[2];
 536 } __packed __aligned(8);
 537
 538 struct ibmvfc_passthru_mad {
 539         struct ibmvfc_mad_common common;
 540         struct srp_direct_buf cmd_ioba;
 541         struct ibmvfc_passthru_iu iu;
 542         struct ibmvfc_passthru_fc_iu fc_iu;
 543 } __packed __aligned(8);
 544
 545 struct ibmvfc_channel_enquiry {
 546         struct ibmvfc_mad_common common;
 547         __be32 flags;
 548 #define IBMVFC_NO_CHANNELS_TO_CRQ_SUPPORT       0x01
 549 #define IBMVFC_SUPPORT_VARIABLE_SUBQ_MSG        0x02
 550 #define IBMVFC_NO_N_TO_M_CHANNELS_SUPPORT       0x04
 551         __be32 num_scsi_subq_channels;
 552         __be32 num_nvmeof_subq_channels;
 553         __be32 num_scsi_vas_channels;
 554         __be32 num_nvmeof_vas_channels;
 555 } __packed __aligned(8);
 556
 557 struct ibmvfc_channel_setup_mad {
 558         struct ibmvfc_mad_common common;
 559         struct srp_direct_buf buffer;
 560 } __packed __aligned(8);
 561
 562 #define IBMVFC_MAX_CHANNELS     502
 563
 564 struct ibmvfc_channel_setup {
 565         __be32 flags;
 566 #define IBMVFC_CANCEL_CHANNELS          0x01
 567 #define IBMVFC_USE_BUFFER               0x02
 568 #define IBMVFC_CHANNELS_CANCELED        0x04
 569         __be32 reserved;
 570         __be32 num_scsi_subq_channels;
 571         __be32 num_nvmeof_subq_channels;
 572         __be32 num_scsi_vas_channels;
 573         __be32 num_nvmeof_vas_channels;
 574         struct srp_direct_buf buffer;
 575         __be64 reserved2[5];
 576         __be64 channel_handles[IBMVFC_MAX_CHANNELS];
 577 } __packed __aligned(8);
 578
 579 struct ibmvfc_connection_info {
 580         struct ibmvfc_mad_common common;
 581         __be64 information_bits;
 582 #define IBMVFC_NO_FC_IO_CHANNEL         0x01
 583 #define IBMVFC_NO_PHYP_VAS              0x02
 584 #define IBMVFC_NO_PHYP_SUBQ             0x04
 585 #define IBMVFC_PHYP_DEPRECATED_SUBQ     0x08
 586 #define IBMVFC_PHYP_PRESERVED_SUBQ      0x10
 587 #define IBMVFC_PHYP_FULL_SUBQ           0x20
 588         __be64 reserved[16];
 589 } __packed __aligned(8);
 590
 591 struct ibmvfc_trace_start_entry {
 592         u32 xfer_len;
 593 } __packed;
 594
 595 struct ibmvfc_trace_end_entry {
 596         u16 status;
 597         u16 error;
 598         u8 fcp_rsp_flags;
 599         u8 rsp_code;
 600         u8 scsi_status;
 601         u8 reserved;
 602 } __packed;
 603
 604 struct ibmvfc_trace_entry {
 605         struct ibmvfc_event *evt;
 606         u32 time;
 607         u32 scsi_id;
 608         u32 lun;
 609         u8 fmt;
 610         u8 op_code;
 611         u8 tmf_flags;
 612         u8 type;
 613 #define IBMVFC_TRC_START        0x00
 614 #define IBMVFC_TRC_END          0xff
 615         union {
 616                 struct ibmvfc_trace_start_entry start;
 617                 struct ibmvfc_trace_end_entry end;
 618         } u;
 619 } __packed __aligned(8);
 620
 621 enum ibmvfc_crq_formats {
 622         IBMVFC_CMD_FORMAT               = 0x01,
 623         IBMVFC_ASYNC_EVENT      = 0x02,
 624         IBMVFC_MAD_FORMAT               = 0x04,
 625 };
 626
 627 enum ibmvfc_async_event {
 628         IBMVFC_AE_ELS_PLOGI             = 0x0001,
 629         IBMVFC_AE_ELS_LOGO              = 0x0002,
 630         IBMVFC_AE_ELS_PRLO              = 0x0004,
 631         IBMVFC_AE_SCN_NPORT             = 0x0008,
 632         IBMVFC_AE_SCN_GROUP             = 0x0010,
 633         IBMVFC_AE_SCN_DOMAIN            = 0x0020,
 634         IBMVFC_AE_SCN_FABRIC            = 0x0040,
 635         IBMVFC_AE_LINK_UP                       = 0x0080,
 636         IBMVFC_AE_LINK_DOWN             = 0x0100,
 637         IBMVFC_AE_LINK_DEAD             = 0x0200,
 638         IBMVFC_AE_HALT                  = 0x0400,
 639         IBMVFC_AE_RESUME                        = 0x0800,
 640         IBMVFC_AE_ADAPTER_FAILED        = 0x1000,
 641         IBMVFC_AE_FPIN                  = 0x2000,
 642 };
 643
 644 struct ibmvfc_async_desc {
 645         const char *desc;
 646         enum ibmvfc_async_event ae;
 647         int log_level;
 648 };
 649
 650 struct ibmvfc_crq {
 651         volatile u8 valid;
 652         volatile u8 format;
 653         u8 reserved[6];
 654         volatile __be64 ioba;
 655 } __packed __aligned(8);
 656
 657 struct ibmvfc_sub_crq {
 658         struct ibmvfc_crq crq;
 659         __be64 reserved[2];
 660 } __packed __aligned(8);
 661
 662 enum ibmvfc_ae_link_state {
 663         IBMVFC_AE_LS_LINK_UP            = 0x01,
 664         IBMVFC_AE_LS_LINK_BOUNCED       = 0x02,
 665         IBMVFC_AE_LS_LINK_DOWN          = 0x04,
 666         IBMVFC_AE_LS_LINK_DEAD          = 0x08,
 667 };
 668
 669 enum ibmvfc_ae_fpin_status {
 670         IBMVFC_AE_FPIN_LINK_CONGESTED   = 0x1,
 671         IBMVFC_AE_FPIN_PORT_CONGESTED   = 0x2,
 672         IBMVFC_AE_FPIN_PORT_CLEARED     = 0x3,
 673         IBMVFC_AE_FPIN_PORT_DEGRADED    = 0x4,
 674 };
 675
 676 struct ibmvfc_async_crq {
 677         volatile u8 valid;
 678         u8 link_state;
 679         u8 fpin_status;
 680         u8 pad;
 681         __be32 pad2;
 682         volatile __be64 event;
 683         volatile __be64 scsi_id;
 684         volatile __be64 wwpn;
 685         volatile __be64 node_name;
 686         __be64 reserved;
 687 } __packed __aligned(8);
 688
 689 union ibmvfc_iu {
 690         struct ibmvfc_mad_common mad_common;
 691         struct ibmvfc_npiv_login_mad npiv_login;
 692         struct ibmvfc_npiv_logout_mad npiv_logout;
 693         struct ibmvfc_discover_targets discover_targets;
 694         struct ibmvfc_port_login plogi;
 695         struct ibmvfc_process_login prli;
 696         struct ibmvfc_move_login move_login;
 697         struct ibmvfc_query_tgt query_tgt;
 698         struct ibmvfc_implicit_logout implicit_logout;
 699         struct ibmvfc_tmf tmf;
 700         struct ibmvfc_cmd cmd;
 701         struct ibmvfc_passthru_mad passthru;
 702         struct ibmvfc_channel_enquiry channel_enquiry;
 703         struct ibmvfc_channel_setup_mad channel_setup;
 704         struct ibmvfc_connection_info connection_info;
 705 } __packed __aligned(8);
 706
 707 enum ibmvfc_target_action {
 708         IBMVFC_TGT_ACTION_NONE = 0,
 709         IBMVFC_TGT_ACTION_INIT,
 710         IBMVFC_TGT_ACTION_INIT_WAIT,
 711         IBMVFC_TGT_ACTION_LOGOUT_RPORT,
 712         IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT,
 713         IBMVFC_TGT_ACTION_DEL_RPORT,
 714         IBMVFC_TGT_ACTION_DELETED_RPORT,
 715         IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT,
 716         IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT,
 717 };
 718
 719 enum ibmvfc_protocol {
 720         IBMVFC_PROTO_SCSI = 0,
 721         IBMVFC_PROTO_NVME = 1,
 722 };
 723
 724 struct ibmvfc_target {
 725         struct list_head queue;
 726         struct ibmvfc_host *vhost;
 727         enum ibmvfc_protocol protocol;
 728         u64 scsi_id;
 729         u64 wwpn;
 730         u64 new_scsi_id;
 731         struct fc_rport *rport;
 732         int target_id;
 733         enum ibmvfc_target_action action;
 734         int need_login;
 735         int add_rport;
 736         int init_retries;
 737         int logo_rcvd;
 738         int move_login;
 739         u32 cancel_key;
 740         struct ibmvfc_service_parms service_parms;
 741         struct ibmvfc_service_parms service_parms_change;
 742         struct fc_rport_identifiers ids;
 743         void (*job_step) (struct ibmvfc_target *);
 744         struct timer_list timer;
 745         struct kref kref;
 746 };
 747
 748 /* a unit of work for the hosting partition */
 749 struct ibmvfc_event {
 750         struct list_head queue_list;
 751         struct list_head cancel;
 752         struct ibmvfc_host *vhost;
 753         struct ibmvfc_queue *queue;
 754         struct ibmvfc_target *tgt;
 755         struct scsi_cmnd *cmnd;
 756         atomic_t free;
 757         atomic_t active;
 758         union ibmvfc_iu *xfer_iu;
 759         void (*done)(struct ibmvfc_event *evt);
 760         void (*_done)(struct ibmvfc_event *evt);
 761         struct ibmvfc_crq crq;
 762         union ibmvfc_iu iu;
 763         union ibmvfc_iu *sync_iu;
 764         struct srp_direct_buf *ext_list;
 765         dma_addr_t ext_list_token;
 766         struct completion comp;
 767         struct completion *eh_comp;
 768         struct timer_list timer;
 769         u16 hwq;
 770         u8 reserved;
 771 };
 772
 773 /* a pool of event structs for use */
 774 struct ibmvfc_event_pool {
 775         struct ibmvfc_event *events;
 776         u32 size;
 777         union ibmvfc_iu *iu_storage;
 778         dma_addr_t iu_token;
 779 };
 780
 781 enum ibmvfc_msg_fmt {
 782         IBMVFC_CRQ_FMT = 0,
 783         IBMVFC_ASYNC_FMT,
 784         IBMVFC_SUB_CRQ_FMT,
 785 };
 786
 787 union ibmvfc_msgs {
 788         void *handle;
 789         struct ibmvfc_crq *crq;
 790         struct ibmvfc_async_crq *async;
 791         struct ibmvfc_sub_crq *scrq;
 792 };
 793
 794 struct ibmvfc_queue {
 795         union ibmvfc_msgs msgs;
 796         dma_addr_t msg_token;
 797         enum ibmvfc_msg_fmt fmt;
 798         int size, cur;
 799         spinlock_t _lock;
 800         spinlock_t *q_lock;
 801
 802         struct ibmvfc_host *vhost;
 803         struct ibmvfc_event_pool evt_pool;
 804         struct list_head sent;
 805         struct list_head free;
 806         u16 total_depth;
 807         u16 evt_depth;
 808         u16 reserved_depth;
 809         u16 evt_free;
 810         u16 reserved_free;
 811         spinlock_t l_lock;
 812
 813         union ibmvfc_iu cancel_rsp;
 814
 815         /* Sub-CRQ fields */
 816         unsigned long cookie;
 817         unsigned long vios_cookie;
 818         unsigned long hw_irq;
 819         unsigned long irq;
 820         unsigned long hwq_id;
 821         char name[32];
 822         irq_handler_t handler;
 823 };
 824
 825 struct ibmvfc_channels {
 826         struct ibmvfc_queue *scrqs;
 827         enum ibmvfc_protocol protocol;
 828         unsigned int active_queues;
 829         unsigned int desired_queues;
 830         unsigned int max_queues;
 831         int disc_buf_sz;
 832         struct ibmvfc_discover_targets_entry *disc_buf;
 833         dma_addr_t disc_buf_dma;
 834 };
 835
 836 enum ibmvfc_host_action {
 837         IBMVFC_HOST_ACTION_NONE = 0,
 838         IBMVFC_HOST_ACTION_RESET,
 839         IBMVFC_HOST_ACTION_REENABLE,
 840         IBMVFC_HOST_ACTION_LOGO,
 841         IBMVFC_HOST_ACTION_LOGO_WAIT,
 842         IBMVFC_HOST_ACTION_INIT,
 843         IBMVFC_HOST_ACTION_INIT_WAIT,
 844         IBMVFC_HOST_ACTION_QUERY,
 845         IBMVFC_HOST_ACTION_QUERY_TGTS,
 846         IBMVFC_HOST_ACTION_TGT_DEL,
 847         IBMVFC_HOST_ACTION_ALLOC_TGTS,
 848         IBMVFC_HOST_ACTION_TGT_INIT,
 849         IBMVFC_HOST_ACTION_TGT_DEL_FAILED,
 850 };
 851
 852 enum ibmvfc_host_state {
 853         IBMVFC_NO_CRQ = 0,
 854         IBMVFC_INITIALIZING,
 855         IBMVFC_ACTIVE,
 856         IBMVFC_HALTED,
 857         IBMVFC_LINK_DOWN,
 858         IBMVFC_LINK_DEAD,
 859         IBMVFC_HOST_OFFLINE,
 860 };
 861
 862 struct ibmvfc_host {
 863         char name[8];
 864         struct list_head queue;
 865         struct Scsi_Host *host;
 866         enum ibmvfc_host_state state;
 867         enum ibmvfc_host_action action;
 868 #define IBMVFC_NUM_TRACE_INDEX_BITS             8
 869 #define IBMVFC_NUM_TRACE_ENTRIES                (1 << IBMVFC_NUM_TRACE_INDEX_BITS)
 870 #define IBMVFC_TRACE_INDEX_MASK                 (IBMVFC_NUM_TRACE_ENTRIES - 1)
 871 #define IBMVFC_TRACE_SIZE       (sizeof(struct ibmvfc_trace_entry) * IBMVFC_NUM_TRACE_ENTRIES)
 872         struct ibmvfc_trace_entry *trace;
 873         atomic_t trace_index;
 874         int num_targets;
 875         struct list_head targets;
 876         struct list_head purge;
 877         struct device *dev;
 878         struct dma_pool *sg_pool;
 879         mempool_t *tgt_pool;
 880         struct ibmvfc_queue crq;
 881         struct ibmvfc_queue async_crq;
 882         struct ibmvfc_channels scsi_scrqs;
 883         struct ibmvfc_npiv_login login_info;
 884         union ibmvfc_npiv_login_data *login_buf;
 885         dma_addr_t login_buf_dma;
 886         struct ibmvfc_channel_setup *channel_setup_buf;
 887         dma_addr_t channel_setup_dma;
 888         int log_level;
 889         struct mutex passthru_mutex;
 890         unsigned int max_vios_scsi_channels;
 891         int task_set;
 892         int init_retries;
 893         int discovery_threads;
 894         int abort_threads;
 895         unsigned int client_migrated:1;
 896         unsigned int reinit:1;
 897         unsigned int delay_init:1;
 898         unsigned int logged_in:1;
 899         unsigned int mq_enabled:1;
 900         unsigned int using_channels:1;
 901         unsigned int do_enquiry:1;
 902         unsigned int aborting_passthru:1;
 903         unsigned int scan_complete:1;
 904         int scan_timeout;
 905         int events_to_log;
 906 #define IBMVFC_AE_LINKUP        0x0001
 907 #define IBMVFC_AE_LINKDOWN      0x0002
 908 #define IBMVFC_AE_RSCN          0x0004
 909         unsigned int partition_number;
 910         char partition_name[97];
 911         void (*job_step) (struct ibmvfc_host *);
 912         struct task_struct *work_thread;
 913         struct tasklet_struct tasklet;
 914         struct work_struct rport_add_work_q;
 915         wait_queue_head_t init_wait_q;
 916         wait_queue_head_t work_wait_q;
 917 };
 918
 919 #define DBG_CMD(CMD) do { if (ibmvfc_debug) CMD; } while (0)
 920
 921 #define tgt_dbg(t, fmt, ...)                    \
 922         DBG_CMD(dev_info((t)->vhost->dev, "%llX: " fmt, (t)->scsi_id, ##__VA_ARGS__))
 923
 924 #define tgt_info(t, fmt, ...)           \
 925         dev_info((t)->vhost->dev, "%llX: " fmt, (t)->scsi_id, ##__VA_ARGS__)
 926
 927 #define tgt_err(t, fmt, ...)            \
 928         dev_err((t)->vhost->dev, "%llX: " fmt, (t)->scsi_id, ##__VA_ARGS__)
 929
 930 #define tgt_log(t, level, fmt, ...) \
 931         do { \
 932                 if ((t)->vhost->log_level >= level) \
 933                         tgt_err(t, fmt, ##__VA_ARGS__); \
 934         } while (0)
 935
 936 #define ibmvfc_dbg(vhost, ...) \
 937         DBG_CMD(dev_info((vhost)->dev, ##__VA_ARGS__))
 938
 939 #define ibmvfc_log(vhost, level, ...) \
 940         do { \
 941                 if ((vhost)->log_level >= level) \
 942                         dev_err((vhost)->dev, ##__VA_ARGS__); \
 943         } while (0)
 944
 945 #define ENTER DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Entering %s\n", __func__))
 946 #define LEAVE DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Leaving %s\n", __func__))
 947
 948 #ifdef CONFIG_SCSI_IBMVFC_TRACE
 949 #define ibmvfc_create_trace_file(kobj, attr) sysfs_create_bin_file(kobj, attr)
 950 #define ibmvfc_remove_trace_file(kobj, attr) sysfs_remove_bin_file(kobj, attr)
 951 #else
 952 #define ibmvfc_create_trace_file(kobj, attr) 0
 953 #define ibmvfc_remove_trace_file(kobj, attr) do { } while (0)
 954 #endif
 955
 956 #endif