include/scsi/scsi_transport_fc.h

   1 /*
   2  *  FiberChannel transport specific attributes exported to sysfs.
   3  *
   4  *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  *  ========
  21  *
  22  *  Copyright (C) 2004-2007   James Smart, Emulex Corporation
  23  *    Rewrite for host, target, device, and remote port attributes,
  24  *    statistics, and service functions...
  25  *
  26  */
  27 #ifndef SCSI_TRANSPORT_FC_H
  28 #define SCSI_TRANSPORT_FC_H
  29
  30 #include <linux/sched.h>
  31 #include <scsi/scsi.h>
  32 #include <scsi/scsi_netlink.h>
  33
  34 struct scsi_transport_template;
  35
  36 /*
  37  * FC Port definitions - Following FC HBAAPI guidelines
  38  *
  39  * Note: Not all binary values for the different fields match HBAAPI.
  40  *  Instead, we use densely packed ordinal values or enums.
  41  *  We get away with this as we never present the actual binary values
  42  *  externally. For sysfs, we always present the string that describes
  43  *  the value. Thus, an admin doesn't need a magic HBAAPI decoder ring
  44  *  to understand the values. The HBAAPI user-space library is free to
  45  *  convert the strings into the HBAAPI-specified binary values.
  46  *
  47  * Note: Not all HBAAPI-defined values are contained in the definitions
  48  *  below. Those not appropriate to an fc_host (e.g. FCP initiator) have
  49  *  been removed.
  50  */
  51
  52 /*
  53  * fc_port_type: If you alter this, you also need to alter scsi_transport_fc.c
  54  * (for the ascii descriptions).
  55  */
  56 enum fc_port_type {
  57         FC_PORTTYPE_UNKNOWN,
  58         FC_PORTTYPE_OTHER,
  59         FC_PORTTYPE_NOTPRESENT,
  60         FC_PORTTYPE_NPORT,              /* Attached to FPort */
  61         FC_PORTTYPE_NLPORT,             /* (Public) Loop w/ FLPort */
  62         FC_PORTTYPE_LPORT,              /* (Private) Loop w/o FLPort */
  63         FC_PORTTYPE_PTP,                /* Point to Point w/ another NPort */
  64         FC_PORTTYPE_NPIV,               /* VPORT based on NPIV */
  65 };
  66
  67
  68 /*
  69  * fc_port_state: If you alter this, you also need to alter scsi_transport_fc.c
  70  * (for the ascii descriptions).
  71  */
  72 enum fc_port_state {
  73         FC_PORTSTATE_UNKNOWN,
  74         FC_PORTSTATE_NOTPRESENT,
  75         FC_PORTSTATE_ONLINE,
  76         FC_PORTSTATE_OFFLINE,           /* User has taken Port Offline */
  77         FC_PORTSTATE_BLOCKED,
  78         FC_PORTSTATE_BYPASSED,
  79         FC_PORTSTATE_DIAGNOSTICS,
  80         FC_PORTSTATE_LINKDOWN,
  81         FC_PORTSTATE_ERROR,
  82         FC_PORTSTATE_LOOPBACK,
  83         FC_PORTSTATE_DELETED,
  84 };
  85
  86
  87 /*
  88  * fc_vport_state: If you alter this, you also need to alter
  89  * scsi_transport_fc.c (for the ascii descriptions).
  90  */
  91 enum fc_vport_state {
  92         FC_VPORT_UNKNOWN,
  93         FC_VPORT_ACTIVE,
  94         FC_VPORT_DISABLED,
  95         FC_VPORT_LINKDOWN,
  96         FC_VPORT_INITIALIZING,
  97         FC_VPORT_NO_FABRIC_SUPP,
  98         FC_VPORT_NO_FABRIC_RSCS,
  99         FC_VPORT_FABRIC_LOGOUT,
 100         FC_VPORT_FABRIC_REJ_WWN,
 101         FC_VPORT_FAILED,
 102 };
 103
 104
 105
 106 /*
 107  * FC Classes of Service
 108  * Note: values are not enumerated, as they can be "or'd" together
 109  * for reporting (e.g. report supported_classes). If you alter this list,
 110  * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
 111  */
 112 #define FC_COS_UNSPECIFIED              0
 113 #define FC_COS_CLASS1                   2
 114 #define FC_COS_CLASS2                   4
 115 #define FC_COS_CLASS3                   8
 116 #define FC_COS_CLASS4                   0x10
 117 #define FC_COS_CLASS6                   0x40
 118
 119 /*
 120  * FC Port Speeds
 121  * Note: values are not enumerated, as they can be "or'd" together
 122  * for reporting (e.g. report supported_speeds). If you alter this list,
 123  * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
 124  */
 125 #define FC_PORTSPEED_UNKNOWN            0 /* Unknown - transceiver
 126                                              incapable of reporting */
 127 #define FC_PORTSPEED_1GBIT              1
 128 #define FC_PORTSPEED_2GBIT              2
 129 #define FC_PORTSPEED_10GBIT             4
 130 #define FC_PORTSPEED_4GBIT              8
 131 #define FC_PORTSPEED_8GBIT              0x10
 132 #define FC_PORTSPEED_16GBIT             0x20
 133 #define FC_PORTSPEED_32GBIT             0x40
 134 #define FC_PORTSPEED_NOT_NEGOTIATED     (1 << 15) /* Speed not established */
 135
 136 /*
 137  * fc_tgtid_binding_type: If you alter this, you also need to alter
 138  * scsi_transport_fc.c (for the ascii descriptions).
 139  */
 140 enum fc_tgtid_binding_type  {
 141         FC_TGTID_BIND_NONE,
 142         FC_TGTID_BIND_BY_WWPN,
 143         FC_TGTID_BIND_BY_WWNN,
 144         FC_TGTID_BIND_BY_ID,
 145 };
 146
 147 /*
 148  * FC Port Roles
 149  * Note: values are not enumerated, as they can be "or'd" together
 150  * for reporting (e.g. report roles). If you alter this list,
 151  * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
 152  */
 153 #define FC_PORT_ROLE_UNKNOWN                    0x00
 154 #define FC_PORT_ROLE_FCP_TARGET                 0x01
 155 #define FC_PORT_ROLE_FCP_INITIATOR              0x02
 156 #define FC_PORT_ROLE_IP_PORT                    0x04
 157
 158 /* The following are for compatibility */
 159 #define FC_RPORT_ROLE_UNKNOWN                   FC_PORT_ROLE_UNKNOWN
 160 #define FC_RPORT_ROLE_FCP_TARGET                FC_PORT_ROLE_FCP_TARGET
 161 #define FC_RPORT_ROLE_FCP_INITIATOR             FC_PORT_ROLE_FCP_INITIATOR
 162 #define FC_RPORT_ROLE_IP_PORT                   FC_PORT_ROLE_IP_PORT
 163
 164
 165 /* Macro for use in defining Virtual Port attributes */
 166 #define FC_VPORT_ATTR(_name,_mode,_show,_store)         \
 167 struct device_attribute dev_attr_vport_##_name =        \
 168         __ATTR(_name,_mode,_show,_store)
 169
 170 /*
 171  * fc_vport_identifiers: This set of data contains all elements
 172  * to uniquely identify and instantiate a FC virtual port.
 173  *
 174  * Notes:
 175  *   symbolic_name: The driver is to append the symbolic_name string data
 176  *      to the symbolic_node_name data that it generates by default.
 177  *      the resulting combination should then be registered with the switch.
 178  *      It is expected that things like Xen may stuff a VM title into
 179  *      this field.
 180  */
 181 #define FC_VPORT_SYMBOLIC_NAMELEN               64
 182 struct fc_vport_identifiers {
 183         u64 node_name;
 184         u64 port_name;
 185         u32 roles;
 186         bool disable;
 187         enum fc_port_type vport_type;   /* only FC_PORTTYPE_NPIV allowed */
 188         char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN];
 189 };
 190
 191 /*
 192  * FC Virtual Port Attributes
 193  *
 194  * This structure exists for each FC port is a virtual FC port. Virtual
 195  * ports share the physical link with the Physical port. Each virtual
 196  * ports has a unique presence on the SAN, and may be instantiated via
 197  * NPIV, Virtual Fabrics, or via additional ALPAs. As the vport is a
 198  * unique presence, each vport has it's own view of the fabric,
 199  * authentication privilege, and priorities.
 200  *
 201  * A virtual port may support 1 or more FC4 roles. Typically it is a
 202  * FCP Initiator. It could be a FCP Target, or exist sole for an IP over FC
 203  * roles. FC port attributes for the vport will be reported on any
 204  * fc_host class object allocated for an FCP Initiator.
 205  *
 206  * --
 207  *
 208  * Fixed attributes are not expected to change. The driver is
 209  * expected to set these values after receiving the fc_vport structure
 210  * via the vport_create() call from the transport.
 211  * The transport fully manages all get functions w/o driver interaction.
 212  *
 213  * Dynamic attributes are expected to change. The driver participates
 214  * in all get/set operations via functions provided by the driver.
 215  *
 216  * Private attributes are transport-managed values. They are fully
 217  * managed by the transport w/o driver interaction.
 218  */
 219
 220 struct fc_vport {
 221         /* Fixed Attributes */
 222
 223         /* Dynamic Attributes */
 224
 225         /* Private (Transport-managed) Attributes */
 226         enum fc_vport_state vport_state;
 227         enum fc_vport_state vport_last_state;
 228         u64 node_name;
 229         u64 port_name;
 230         u32 roles;
 231         u32 vport_id;           /* Admin Identifier for the vport */
 232         enum fc_port_type vport_type;
 233         char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN];
 234
 235         /* exported data */
 236         void *dd_data;                  /* Used for driver-specific storage */
 237
 238         /* internal data */
 239         struct Scsi_Host *shost;        /* Physical Port Parent */
 240         unsigned int channel;
 241         u32 number;
 242         u8 flags;
 243         struct list_head peers;
 244         struct device dev;
 245         struct work_struct vport_delete_work;
 246 } __attribute__((aligned(sizeof(unsigned long))));
 247
 248 /* bit field values for struct fc_vport "flags" field: */
 249 #define FC_VPORT_CREATING               0x01
 250 #define FC_VPORT_DELETING               0x02
 251 #define FC_VPORT_DELETED                0x04
 252 #define FC_VPORT_DEL                    0x06    /* Any DELETE state */
 253
 254 #define dev_to_vport(d)                         \
 255         container_of(d, struct fc_vport, dev)
 256 #define transport_class_to_vport(dev)           \
 257         dev_to_vport(dev->parent)
 258 #define vport_to_shost(v)                       \
 259         (v->shost)
 260 #define vport_to_shost_channel(v)               \
 261         (v->channel)
 262 #define vport_to_parent(v)                      \
 263         (v->dev.parent)
 264
 265
 266 /* Error return codes for vport_create() callback */
 267 #define VPCERR_UNSUPPORTED              -ENOSYS         /* no driver/adapter
 268                                                            support */
 269 #define VPCERR_BAD_WWN                  -ENOTUNIQ       /* driver validation
 270                                                            of WWNs failed */
 271 #define VPCERR_NO_FABRIC_SUPP           -EOPNOTSUPP     /* Fabric connection
 272                                                            is loop or the
 273                                                            Fabric Port does
 274                                                            not support NPIV */
 275
 276 /*
 277  * fc_rport_identifiers: This set of data contains all elements
 278  * to uniquely identify a remote FC port. The driver uses this data
 279  * to report the existence of a remote FC port in the topology. Internally,
 280  * the transport uses this data for attributes and to manage consistent
 281  * target id bindings.
 282  */
 283 struct fc_rport_identifiers {
 284         u64 node_name;
 285         u64 port_name;
 286         u32 port_id;
 287         u32 roles;
 288 };
 289
 290
 291 /* Macro for use in defining Remote Port attributes */
 292 #define FC_RPORT_ATTR(_name,_mode,_show,_store)                         \
 293 struct device_attribute dev_attr_rport_##_name =        \
 294         __ATTR(_name,_mode,_show,_store)
 295
 296
 297 /*
 298  * FC Remote Port Attributes
 299  *
 300  * This structure exists for each remote FC port that a LLDD notifies
 301  * the subsystem of.  A remote FC port may or may not be a SCSI Target,
 302  * also be a SCSI initiator, IP endpoint, etc. As such, the remote
 303  * port is considered a separate entity, independent of "role" (such
 304  * as scsi target).
 305  *
 306  * --
 307  *
 308  * Attributes are based on HBAAPI V2.0 definitions. Only those
 309  * attributes that are determinable by the local port (aka Host)
 310  * are contained.
 311  *
 312  * Fixed attributes are not expected to change. The driver is
 313  * expected to set these values after successfully calling
 314  * fc_remote_port_add(). The transport fully manages all get functions
 315  * w/o driver interaction.
 316  *
 317  * Dynamic attributes are expected to change. The driver participates
 318  * in all get/set operations via functions provided by the driver.
 319  *
 320  * Private attributes are transport-managed values. They are fully
 321  * managed by the transport w/o driver interaction.
 322  */
 323
 324 struct fc_rport {       /* aka fc_starget_attrs */
 325         /* Fixed Attributes */
 326         u32 maxframe_size;
 327         u32 supported_classes;
 328
 329         /* Dynamic Attributes */
 330         u32 dev_loss_tmo;       /* Remote Port loss timeout in seconds. */
 331
 332         /* Private (Transport-managed) Attributes */
 333         u64 node_name;
 334         u64 port_name;
 335         u32 port_id;
 336         u32 roles;
 337         enum fc_port_state port_state;  /* Will only be ONLINE or UNKNOWN */
 338         u32 scsi_target_id;
 339         u32 fast_io_fail_tmo;
 340
 341         /* exported data */
 342         void *dd_data;                  /* Used for driver-specific storage */
 343
 344         /* internal data */
 345         unsigned int channel;
 346         u32 number;
 347         u8 flags;
 348         struct list_head peers;
 349         struct device dev;
 350         struct delayed_work dev_loss_work;
 351         struct work_struct scan_work;
 352         struct delayed_work fail_io_work;
 353         struct work_struct stgt_delete_work;
 354         struct work_struct rport_delete_work;
 355         struct request_queue *rqst_q;   /* bsg support */
 356 } __attribute__((aligned(sizeof(unsigned long))));
 357
 358 /* bit field values for struct fc_rport "flags" field: */
 359 #define FC_RPORT_DEVLOSS_PENDING        0x01
 360 #define FC_RPORT_SCAN_PENDING           0x02
 361 #define FC_RPORT_FAST_FAIL_TIMEDOUT     0x04
 362 #define FC_RPORT_DEVLOSS_CALLBK_DONE    0x08
 363
 364 #define dev_to_rport(d)                         \
 365         container_of(d, struct fc_rport, dev)
 366 #define transport_class_to_rport(dev)   \
 367         dev_to_rport(dev->parent)
 368 #define rport_to_shost(r)                       \
 369         dev_to_shost(r->dev.parent)
 370
 371 /*
 372  * FC SCSI Target Attributes
 373  *
 374  * The SCSI Target is considered an extension of a remote port (as
 375  * a remote port can be more than a SCSI Target). Within the scsi
 376  * subsystem, we leave the Target as a separate entity. Doing so
 377  * provides backward compatibility with prior FC transport api's,
 378  * and lets remote ports be handled entirely within the FC transport
 379  * and independently from the scsi subsystem. The drawback is that
 380  * some data will be duplicated.
 381  */
 382
 383 struct fc_starget_attrs {       /* aka fc_target_attrs */
 384         /* Dynamic Attributes */
 385         u64 node_name;
 386         u64 port_name;
 387         u32 port_id;
 388 };
 389
 390 #define fc_starget_node_name(x) \
 391         (((struct fc_starget_attrs *)&(x)->starget_data)->node_name)
 392 #define fc_starget_port_name(x) \
 393         (((struct fc_starget_attrs *)&(x)->starget_data)->port_name)
 394 #define fc_starget_port_id(x) \
 395         (((struct fc_starget_attrs *)&(x)->starget_data)->port_id)
 396
 397 #define starget_to_rport(s)                     \
 398         scsi_is_fc_rport(s->dev.parent) ? dev_to_rport(s->dev.parent) : NULL
 399
 400
 401 /*
 402  * FC Local Port (Host) Statistics
 403  */
 404
 405 /* FC Statistics - Following FC HBAAPI v2.0 guidelines */
 406 struct fc_host_statistics {
 407         /* port statistics */
 408         u64 seconds_since_last_reset;
 409         u64 tx_frames;
 410         u64 tx_words;
 411         u64 rx_frames;
 412         u64 rx_words;
 413         u64 lip_count;
 414         u64 nos_count;
 415         u64 error_frames;
 416         u64 dumped_frames;
 417         u64 link_failure_count;
 418         u64 loss_of_sync_count;
 419         u64 loss_of_signal_count;
 420         u64 prim_seq_protocol_err_count;
 421         u64 invalid_tx_word_count;
 422         u64 invalid_crc_count;
 423
 424         /* fc4 statistics  (only FCP supported currently) */
 425         u64 fcp_input_requests;
 426         u64 fcp_output_requests;
 427         u64 fcp_control_requests;
 428         u64 fcp_input_megabytes;
 429         u64 fcp_output_megabytes;
 430         u64 fcp_packet_alloc_failures;  /* fcp packet allocation failures */
 431         u64 fcp_packet_aborts;          /* fcp packet aborted */
 432         u64 fcp_frame_alloc_failures;   /* fcp frame allocation failures */
 433
 434         /* fc exches statistics */
 435         u64 fc_no_free_exch;            /* no free exch memory */
 436         u64 fc_no_free_exch_xid;        /* no free exch id */
 437         u64 fc_xid_not_found;           /* exch not found for a response */
 438         u64 fc_xid_busy;                /* exch exist for new a request */
 439         u64 fc_seq_not_found;           /* seq is not found for exchange */
 440         u64 fc_non_bls_resp;            /* a non BLS response frame with
 441                                            a sequence responder in new exch */
 442 };
 443
 444
 445 /*
 446  * FC Event Codes - Polled and Async, following FC HBAAPI v2.0 guidelines
 447  */
 448
 449 /*
 450  * fc_host_event_code: If you alter this, you also need to alter
 451  * scsi_transport_fc.c (for the ascii descriptions).
 452  */
 453 enum fc_host_event_code  {
 454         FCH_EVT_LIP                     = 0x1,
 455         FCH_EVT_LINKUP                  = 0x2,
 456         FCH_EVT_LINKDOWN                = 0x3,
 457         FCH_EVT_LIPRESET                = 0x4,
 458         FCH_EVT_RSCN                    = 0x5,
 459         FCH_EVT_ADAPTER_CHANGE          = 0x103,
 460         FCH_EVT_PORT_UNKNOWN            = 0x200,
 461         FCH_EVT_PORT_OFFLINE            = 0x201,
 462         FCH_EVT_PORT_ONLINE             = 0x202,
 463         FCH_EVT_PORT_FABRIC             = 0x204,
 464         FCH_EVT_LINK_UNKNOWN            = 0x500,
 465         FCH_EVT_VENDOR_UNIQUE           = 0xffff,
 466 };
 467
 468
 469 /*
 470  * FC Local Port (Host) Attributes
 471  *
 472  * Attributes are based on HBAAPI V2.0 definitions.
 473  * Note: OSDeviceName is determined by user-space library
 474  *
 475  * Fixed attributes are not expected to change. The driver is
 476  * expected to set these values after successfully calling scsi_add_host().
 477  * The transport fully manages all get functions w/o driver interaction.
 478  *
 479  * Dynamic attributes are expected to change. The driver participates
 480  * in all get/set operations via functions provided by the driver.
 481  *
 482  * Private attributes are transport-managed values. They are fully
 483  * managed by the transport w/o driver interaction.
 484  */
 485
 486 #define FC_FC4_LIST_SIZE                32
 487 #define FC_SYMBOLIC_NAME_SIZE           256
 488 #define FC_VERSION_STRING_SIZE          64
 489 #define FC_SERIAL_NUMBER_SIZE           80
 490
 491 struct fc_host_attrs {
 492         /* Fixed Attributes */
 493         u64 node_name;
 494         u64 port_name;
 495         u64 permanent_port_name;
 496         u32 supported_classes;
 497         u8  supported_fc4s[FC_FC4_LIST_SIZE];
 498         u32 supported_speeds;
 499         u32 maxframe_size;
 500         u16 max_npiv_vports;
 501         char serial_number[FC_SERIAL_NUMBER_SIZE];
 502         char manufacturer[FC_SERIAL_NUMBER_SIZE];
 503         char model[FC_SYMBOLIC_NAME_SIZE];
 504         char model_description[FC_SYMBOLIC_NAME_SIZE];
 505         char hardware_version[FC_VERSION_STRING_SIZE];
 506         char driver_version[FC_VERSION_STRING_SIZE];
 507         char firmware_version[FC_VERSION_STRING_SIZE];
 508         char optionrom_version[FC_VERSION_STRING_SIZE];
 509
 510         /* Dynamic Attributes */
 511         u32 port_id;
 512         enum fc_port_type port_type;
 513         enum fc_port_state port_state;
 514         u8  active_fc4s[FC_FC4_LIST_SIZE];
 515         u32 speed;
 516         u64 fabric_name;
 517         char symbolic_name[FC_SYMBOLIC_NAME_SIZE];
 518         char system_hostname[FC_SYMBOLIC_NAME_SIZE];
 519         u32 dev_loss_tmo;
 520
 521         /* Private (Transport-managed) Attributes */
 522         enum fc_tgtid_binding_type  tgtid_bind_type;
 523
 524         /* internal data */
 525         struct list_head rports;
 526         struct list_head rport_bindings;
 527         struct list_head vports;
 528         u32 next_rport_number;
 529         u32 next_target_id;
 530         u32 next_vport_number;
 531         u16 npiv_vports_inuse;
 532
 533         /* work queues for rport state manipulation */
 534         char work_q_name[20];
 535         struct workqueue_struct *work_q;
 536         char devloss_work_q_name[20];
 537         struct workqueue_struct *devloss_work_q;
 538
 539         /* bsg support */
 540         struct request_queue *rqst_q;
 541 };
 542
 543 #define shost_to_fc_host(x) \
 544         ((struct fc_host_attrs *)(x)->shost_data)
 545
 546 #define fc_host_node_name(x) \
 547         (((struct fc_host_attrs *)(x)->shost_data)->node_name)
 548 #define fc_host_port_name(x)    \
 549         (((struct fc_host_attrs *)(x)->shost_data)->port_name)
 550 #define fc_host_permanent_port_name(x)  \
 551         (((struct fc_host_attrs *)(x)->shost_data)->permanent_port_name)
 552 #define fc_host_supported_classes(x)    \
 553         (((struct fc_host_attrs *)(x)->shost_data)->supported_classes)
 554 #define fc_host_supported_fc4s(x)       \
 555         (((struct fc_host_attrs *)(x)->shost_data)->supported_fc4s)
 556 #define fc_host_supported_speeds(x)     \
 557         (((struct fc_host_attrs *)(x)->shost_data)->supported_speeds)
 558 #define fc_host_maxframe_size(x)        \
 559         (((struct fc_host_attrs *)(x)->shost_data)->maxframe_size)
 560 #define fc_host_max_npiv_vports(x)      \
 561         (((struct fc_host_attrs *)(x)->shost_data)->max_npiv_vports)
 562 #define fc_host_serial_number(x)        \
 563         (((struct fc_host_attrs *)(x)->shost_data)->serial_number)
 564 #define fc_host_manufacturer(x) \
 565         (((struct fc_host_attrs *)(x)->shost_data)->manufacturer)
 566 #define fc_host_model(x)        \
 567         (((struct fc_host_attrs *)(x)->shost_data)->model)
 568 #define fc_host_model_description(x)    \
 569         (((struct fc_host_attrs *)(x)->shost_data)->model_description)
 570 #define fc_host_hardware_version(x)     \
 571         (((struct fc_host_attrs *)(x)->shost_data)->hardware_version)
 572 #define fc_host_driver_version(x)       \
 573         (((struct fc_host_attrs *)(x)->shost_data)->driver_version)
 574 #define fc_host_firmware_version(x)     \
 575         (((struct fc_host_attrs *)(x)->shost_data)->firmware_version)
 576 #define fc_host_optionrom_version(x)    \
 577         (((struct fc_host_attrs *)(x)->shost_data)->optionrom_version)
 578 #define fc_host_port_id(x)      \
 579         (((struct fc_host_attrs *)(x)->shost_data)->port_id)
 580 #define fc_host_port_type(x)    \
 581         (((struct fc_host_attrs *)(x)->shost_data)->port_type)
 582 #define fc_host_port_state(x)   \
 583         (((struct fc_host_attrs *)(x)->shost_data)->port_state)
 584 #define fc_host_active_fc4s(x)  \
 585         (((struct fc_host_attrs *)(x)->shost_data)->active_fc4s)
 586 #define fc_host_speed(x)        \
 587         (((struct fc_host_attrs *)(x)->shost_data)->speed)
 588 #define fc_host_fabric_name(x)  \
 589         (((struct fc_host_attrs *)(x)->shost_data)->fabric_name)
 590 #define fc_host_symbolic_name(x)        \
 591         (((struct fc_host_attrs *)(x)->shost_data)->symbolic_name)
 592 #define fc_host_system_hostname(x)      \
 593         (((struct fc_host_attrs *)(x)->shost_data)->system_hostname)
 594 #define fc_host_tgtid_bind_type(x) \
 595         (((struct fc_host_attrs *)(x)->shost_data)->tgtid_bind_type)
 596 #define fc_host_rports(x) \
 597         (((struct fc_host_attrs *)(x)->shost_data)->rports)
 598 #define fc_host_rport_bindings(x) \
 599         (((struct fc_host_attrs *)(x)->shost_data)->rport_bindings)
 600 #define fc_host_vports(x) \
 601         (((struct fc_host_attrs *)(x)->shost_data)->vports)
 602 #define fc_host_next_rport_number(x) \
 603         (((struct fc_host_attrs *)(x)->shost_data)->next_rport_number)
 604 #define fc_host_next_target_id(x) \
 605         (((struct fc_host_attrs *)(x)->shost_data)->next_target_id)
 606 #define fc_host_next_vport_number(x) \
 607         (((struct fc_host_attrs *)(x)->shost_data)->next_vport_number)
 608 #define fc_host_npiv_vports_inuse(x)    \
 609         (((struct fc_host_attrs *)(x)->shost_data)->npiv_vports_inuse)
 610 #define fc_host_work_q_name(x) \
 611         (((struct fc_host_attrs *)(x)->shost_data)->work_q_name)
 612 #define fc_host_work_q(x) \
 613         (((struct fc_host_attrs *)(x)->shost_data)->work_q)
 614 #define fc_host_devloss_work_q_name(x) \
 615         (((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q_name)
 616 #define fc_host_devloss_work_q(x) \
 617         (((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q)
 618 #define fc_host_dev_loss_tmo(x) \
 619         (((struct fc_host_attrs *)(x)->shost_data)->dev_loss_tmo)
 620
 621
 622 struct fc_bsg_buffer {
 623         unsigned int payload_len;
 624         int sg_cnt;
 625         struct scatterlist *sg_list;
 626 };
 627
 628 /* Values for fc_bsg_job->state_flags (bitflags) */
 629 #define FC_RQST_STATE_INPROGRESS        0
 630 #define FC_RQST_STATE_DONE              1
 631
 632 struct fc_bsg_job {
 633         struct Scsi_Host *shost;
 634         struct fc_rport *rport;
 635         struct device *dev;
 636         struct request *req;
 637         spinlock_t job_lock;
 638         unsigned int state_flags;
 639         unsigned int ref_cnt;
 640         void (*job_done)(struct fc_bsg_job *);
 641
 642         struct fc_bsg_request *request;
 643         struct fc_bsg_reply *reply;
 644         unsigned int request_len;
 645         unsigned int reply_len;
 646         /*
 647          * On entry : reply_len indicates the buffer size allocated for
 648          * the reply.
 649          *
 650          * Upon completion : the message handler must set reply_len
 651          *  to indicates the size of the reply to be returned to the
 652          *  caller.
 653          */
 654
 655         /* DMA payloads for the request/response */
 656         struct fc_bsg_buffer request_payload;
 657         struct fc_bsg_buffer reply_payload;
 658
 659         void *dd_data;                  /* Used for driver-specific storage */
 660 };
 661
 662
 663 /* The functions by which the transport class and the driver communicate */
 664 struct fc_function_template {
 665         void    (*get_rport_dev_loss_tmo)(struct fc_rport *);
 666         void    (*set_rport_dev_loss_tmo)(struct fc_rport *, u32);
 667
 668         void    (*get_starget_node_name)(struct scsi_target *);
 669         void    (*get_starget_port_name)(struct scsi_target *);
 670         void    (*get_starget_port_id)(struct scsi_target *);
 671
 672         void    (*get_host_port_id)(struct Scsi_Host *);
 673         void    (*get_host_port_type)(struct Scsi_Host *);
 674         void    (*get_host_port_state)(struct Scsi_Host *);
 675         void    (*get_host_active_fc4s)(struct Scsi_Host *);
 676         void    (*get_host_speed)(struct Scsi_Host *);
 677         void    (*get_host_fabric_name)(struct Scsi_Host *);
 678         void    (*get_host_symbolic_name)(struct Scsi_Host *);
 679         void    (*set_host_system_hostname)(struct Scsi_Host *);
 680
 681         struct fc_host_statistics * (*get_fc_host_stats)(struct Scsi_Host *);
 682         void    (*reset_fc_host_stats)(struct Scsi_Host *);
 683
 684         int     (*issue_fc_host_lip)(struct Scsi_Host *);
 685
 686         void    (*dev_loss_tmo_callbk)(struct fc_rport *);
 687         void    (*terminate_rport_io)(struct fc_rport *);
 688
 689         void    (*set_vport_symbolic_name)(struct fc_vport *);
 690         int     (*vport_create)(struct fc_vport *, bool);
 691         int     (*vport_disable)(struct fc_vport *, bool);
 692         int     (*vport_delete)(struct fc_vport *);
 693
 694         /* target-mode drivers' functions */
 695         int     (* tsk_mgmt_response)(struct Scsi_Host *, u64, u64, int);
 696         int     (* it_nexus_response)(struct Scsi_Host *, u64, int);
 697
 698         /* bsg support */
 699         int     (*bsg_request)(struct fc_bsg_job *);
 700         int     (*bsg_timeout)(struct fc_bsg_job *);
 701
 702         /* allocation lengths for host-specific data */
 703         u32                             dd_fcrport_size;
 704         u32                             dd_fcvport_size;
 705         u32                             dd_bsg_size;
 706
 707         /*
 708          * The driver sets these to tell the transport class it
 709          * wants the attributes displayed in sysfs.  If the show_ flag
 710          * is not set, the attribute will be private to the transport
 711          * class
 712          */
 713
 714         /* remote port fixed attributes */
 715         unsigned long   show_rport_maxframe_size:1;
 716         unsigned long   show_rport_supported_classes:1;
 717         unsigned long   show_rport_dev_loss_tmo:1;
 718
 719         /*
 720          * target dynamic attributes
 721          * These should all be "1" if the driver uses the remote port
 722          * add/delete functions (so attributes reflect rport values).
 723          */
 724         unsigned long   show_starget_node_name:1;
 725         unsigned long   show_starget_port_name:1;
 726         unsigned long   show_starget_port_id:1;
 727
 728         /* host fixed attributes */
 729         unsigned long   show_host_node_name:1;
 730         unsigned long   show_host_port_name:1;
 731         unsigned long   show_host_permanent_port_name:1;
 732         unsigned long   show_host_supported_classes:1;
 733         unsigned long   show_host_supported_fc4s:1;
 734         unsigned long   show_host_supported_speeds:1;
 735         unsigned long   show_host_maxframe_size:1;
 736         unsigned long   show_host_serial_number:1;
 737         unsigned long   show_host_manufacturer:1;
 738         unsigned long   show_host_model:1;
 739         unsigned long   show_host_model_description:1;
 740         unsigned long   show_host_hardware_version:1;
 741         unsigned long   show_host_driver_version:1;
 742         unsigned long   show_host_firmware_version:1;
 743         unsigned long   show_host_optionrom_version:1;
 744         /* host dynamic attributes */
 745         unsigned long   show_host_port_id:1;
 746         unsigned long   show_host_port_type:1;
 747         unsigned long   show_host_port_state:1;
 748         unsigned long   show_host_active_fc4s:1;
 749         unsigned long   show_host_speed:1;
 750         unsigned long   show_host_fabric_name:1;
 751         unsigned long   show_host_symbolic_name:1;
 752         unsigned long   show_host_system_hostname:1;
 753
 754         unsigned long   disable_target_scan:1;
 755 };
 756
 757
 758 /**
 759  * fc_remote_port_chkready - called to validate the remote port state
 760  *   prior to initiating io to the port.
 761  *
 762  * Returns a scsi result code that can be returned by the LLDD.
 763  *
 764  * @rport:      remote port to be checked
 765  **/
 766 static inline int
 767 fc_remote_port_chkready(struct fc_rport *rport)
 768 {
 769         int result;
 770
 771         switch (rport->port_state) {
 772         case FC_PORTSTATE_ONLINE:
 773                 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
 774                         result = 0;
 775                 else if (rport->flags & FC_RPORT_DEVLOSS_PENDING)
 776                         result = DID_IMM_RETRY << 16;
 777                 else
 778                         result = DID_NO_CONNECT << 16;
 779                 break;
 780         case FC_PORTSTATE_BLOCKED:
 781                 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
 782                         result = DID_TRANSPORT_FAILFAST << 16;
 783                 else
 784                         result = DID_IMM_RETRY << 16;
 785                 break;
 786         default:
 787                 result = DID_NO_CONNECT << 16;
 788                 break;
 789         }
 790         return result;
 791 }
 792
 793 static inline u64 wwn_to_u64(u8 *wwn)
 794 {
 795         return (u64)wwn[0] << 56 | (u64)wwn[1] << 48 |
 796             (u64)wwn[2] << 40 | (u64)wwn[3] << 32 |
 797             (u64)wwn[4] << 24 | (u64)wwn[5] << 16 |
 798             (u64)wwn[6] <<  8 | (u64)wwn[7];
 799 }
 800
 801 static inline void u64_to_wwn(u64 inm, u8 *wwn)
 802 {
 803         wwn[0] = (inm >> 56) & 0xff;
 804         wwn[1] = (inm >> 48) & 0xff;
 805         wwn[2] = (inm >> 40) & 0xff;
 806         wwn[3] = (inm >> 32) & 0xff;
 807         wwn[4] = (inm >> 24) & 0xff;
 808         wwn[5] = (inm >> 16) & 0xff;
 809         wwn[6] = (inm >> 8) & 0xff;
 810         wwn[7] = inm & 0xff;
 811 }
 812
 813 /**
 814  * fc_vport_set_state() - called to set a vport's state. Saves the old state,
 815  *   excepting the transitory states of initializing and sending the ELS
 816  *   traffic to instantiate the vport on the link.
 817  *
 818  * Assumes the driver has surrounded this with the proper locking to ensure
 819  * a coherent state change.
 820  *
 821  * @vport:      virtual port whose state is changing
 822  * @new_state:  new state
 823  **/
 824 static inline void
 825 fc_vport_set_state(struct fc_vport *vport, enum fc_vport_state new_state)
 826 {
 827         if ((new_state != FC_VPORT_UNKNOWN) &&
 828             (new_state != FC_VPORT_INITIALIZING))
 829                 vport->vport_last_state = vport->vport_state;
 830         vport->vport_state = new_state;
 831 }
 832
 833 struct scsi_transport_template *fc_attach_transport(
 834                         struct fc_function_template *);
 835 void fc_release_transport(struct scsi_transport_template *);
 836 void fc_remove_host(struct Scsi_Host *);
 837 struct fc_rport *fc_remote_port_add(struct Scsi_Host *shost,
 838                         int channel, struct fc_rport_identifiers  *ids);
 839 void fc_remote_port_delete(struct fc_rport  *rport);
 840 void fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles);
 841 int scsi_is_fc_rport(const struct device *);
 842 u32 fc_get_event_number(void);
 843 void fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
 844                 enum fc_host_event_code event_code, u32 event_data);
 845 void fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
 846                 u32 data_len, char * data_buf, u64 vendor_id);
 847         /* Note: when specifying vendor_id to fc_host_post_vendor_event()
 848          *   be sure to read the Vendor Type and ID formatting requirements
 849          *   specified in scsi_netlink.h
 850          */
 851 struct fc_vport *fc_vport_create(struct Scsi_Host *shost, int channel,
 852                 struct fc_vport_identifiers *);
 853 int fc_vport_terminate(struct fc_vport *vport);
 854 int fc_block_scsi_eh(struct scsi_cmnd *cmnd);
 855
 856 #endif /* SCSI_TRANSPORT_FC_H */