root/include/scsi/scsi_transport_fc.h

INCLUDED FROM

DEFINITIONS

1. fc_remote_port_chkready
2. wwn_to_u64
3. u64_to_wwn
4. fc_vport_set_state
5. fc_bsg_to_shost
6. fc_bsg_to_rport

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *  FiberChannel transport specific attributes exported to sysfs.
   4  *
   5  *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
   6  *  Copyright (C) 2004-2007   James Smart, Emulex Corporation
   7  *    Rewrite for host, target, device, and remote port attributes,
   8  *    statistics, and service functions...
   9  */
  10 #ifndef SCSI_TRANSPORT_FC_H
  11 #define SCSI_TRANSPORT_FC_H
  12 
  13 #include <linux/sched.h>
  14 #include <linux/bsg-lib.h>
  15 #include <asm/unaligned.h>
  16 #include <scsi/scsi.h>
  17 #include <scsi/scsi_netlink.h>
  18 #include <scsi/scsi_host.h>
  19 
  20 struct scsi_transport_template;
  21 
  22 /*
  23  * FC Port definitions - Following FC HBAAPI guidelines
  24  *
  25  * Note: Not all binary values for the different fields match HBAAPI.
  26  *  Instead, we use densely packed ordinal values or enums.
  27  *  We get away with this as we never present the actual binary values
  28  *  externally. For sysfs, we always present the string that describes
  29  *  the value. Thus, an admin doesn't need a magic HBAAPI decoder ring
  30  *  to understand the values. The HBAAPI user-space library is free to
  31  *  convert the strings into the HBAAPI-specified binary values.
  32  *
  33  * Note: Not all HBAAPI-defined values are contained in the definitions
  34  *  below. Those not appropriate to an fc_host (e.g. FCP initiator) have
  35  *  been removed.
  36  */
  37 
  38 /*
  39  * fc_port_type: If you alter this, you also need to alter scsi_transport_fc.c
  40  * (for the ascii descriptions).
  41  */
  42 enum fc_port_type {
  43         FC_PORTTYPE_UNKNOWN,
  44         FC_PORTTYPE_OTHER,
  45         FC_PORTTYPE_NOTPRESENT,
  46         FC_PORTTYPE_NPORT,              /* Attached to FPort */
  47         FC_PORTTYPE_NLPORT,             /* (Public) Loop w/ FLPort */
  48         FC_PORTTYPE_LPORT,              /* (Private) Loop w/o FLPort */
  49         FC_PORTTYPE_PTP,                /* Point to Point w/ another NPort */
  50         FC_PORTTYPE_NPIV,               /* VPORT based on NPIV */
  51 };
  52 
  53 
  54 /*
  55  * fc_port_state: If you alter this, you also need to alter scsi_transport_fc.c
  56  * (for the ascii descriptions).
  57  */
  58 enum fc_port_state {
  59         FC_PORTSTATE_UNKNOWN,
  60         FC_PORTSTATE_NOTPRESENT,
  61         FC_PORTSTATE_ONLINE,
  62         FC_PORTSTATE_OFFLINE,           /* User has taken Port Offline */
  63         FC_PORTSTATE_BLOCKED,
  64         FC_PORTSTATE_BYPASSED,
  65         FC_PORTSTATE_DIAGNOSTICS,
  66         FC_PORTSTATE_LINKDOWN,
  67         FC_PORTSTATE_ERROR,
  68         FC_PORTSTATE_LOOPBACK,
  69         FC_PORTSTATE_DELETED,
  70 };
  71 
  72 
  73 /*
  74  * fc_vport_state: If you alter this, you also need to alter
  75  * scsi_transport_fc.c (for the ascii descriptions).
  76  */
  77 enum fc_vport_state {
  78         FC_VPORT_UNKNOWN,
  79         FC_VPORT_ACTIVE,
  80         FC_VPORT_DISABLED,
  81         FC_VPORT_LINKDOWN,
  82         FC_VPORT_INITIALIZING,
  83         FC_VPORT_NO_FABRIC_SUPP,
  84         FC_VPORT_NO_FABRIC_RSCS,
  85         FC_VPORT_FABRIC_LOGOUT,
  86         FC_VPORT_FABRIC_REJ_WWN,
  87         FC_VPORT_FAILED,
  88 };
  89 
  90 
  91 
  92 /*
  93  * FC Classes of Service
  94  * Note: values are not enumerated, as they can be "or'd" together
  95  * for reporting (e.g. report supported_classes). If you alter this list,
  96  * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
  97  */
  98 #define FC_COS_UNSPECIFIED              0
  99 #define FC_COS_CLASS1                   2
 100 #define FC_COS_CLASS2                   4
 101 #define FC_COS_CLASS3                   8
 102 #define FC_COS_CLASS4                   0x10
 103 #define FC_COS_CLASS6                   0x40
 104 
 105 /*
 106  * FC Port Speeds
 107  * Note: values are not enumerated, as they can be "or'd" together
 108  * for reporting (e.g. report supported_speeds). If you alter this list,
 109  * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
 110  */
 111 #define FC_PORTSPEED_UNKNOWN            0 /* Unknown - transceiver
 112                                              incapable of reporting */
 113 #define FC_PORTSPEED_1GBIT              1
 114 #define FC_PORTSPEED_2GBIT              2
 115 #define FC_PORTSPEED_10GBIT             4
 116 #define FC_PORTSPEED_4GBIT              8
 117 #define FC_PORTSPEED_8GBIT              0x10
 118 #define FC_PORTSPEED_16GBIT             0x20
 119 #define FC_PORTSPEED_32GBIT             0x40
 120 #define FC_PORTSPEED_20GBIT             0x80
 121 #define FC_PORTSPEED_40GBIT             0x100
 122 #define FC_PORTSPEED_50GBIT             0x200
 123 #define FC_PORTSPEED_100GBIT            0x400
 124 #define FC_PORTSPEED_25GBIT             0x800
 125 #define FC_PORTSPEED_64GBIT             0x1000
 126 #define FC_PORTSPEED_128GBIT            0x2000
 127 #define FC_PORTSPEED_NOT_NEGOTIATED     (1 << 15) /* Speed not established */
 128 
 129 /*
 130  * fc_tgtid_binding_type: If you alter this, you also need to alter
 131  * scsi_transport_fc.c (for the ascii descriptions).
 132  */
 133 enum fc_tgtid_binding_type  {
 134         FC_TGTID_BIND_NONE,
 135         FC_TGTID_BIND_BY_WWPN,
 136         FC_TGTID_BIND_BY_WWNN,
 137         FC_TGTID_BIND_BY_ID,
 138 };
 139 
 140 /*
 141  * FC Port Roles
 142  * Note: values are not enumerated, as they can be "or'd" together
 143  * for reporting (e.g. report roles). If you alter this list,
 144  * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
 145  */
 146 #define FC_PORT_ROLE_UNKNOWN                    0x00
 147 #define FC_PORT_ROLE_FCP_TARGET                 0x01
 148 #define FC_PORT_ROLE_FCP_INITIATOR              0x02
 149 #define FC_PORT_ROLE_IP_PORT                    0x04
 150 #define FC_PORT_ROLE_FCP_DUMMY_INITIATOR        0x08
 151 #define FC_PORT_ROLE_NVME_INITIATOR             0x10
 152 #define FC_PORT_ROLE_NVME_TARGET                0x20
 153 #define FC_PORT_ROLE_NVME_DISCOVERY             0x40
 154 
 155 /* The following are for compatibility */
 156 #define FC_RPORT_ROLE_UNKNOWN                   FC_PORT_ROLE_UNKNOWN
 157 #define FC_RPORT_ROLE_FCP_TARGET                FC_PORT_ROLE_FCP_TARGET
 158 #define FC_RPORT_ROLE_FCP_INITIATOR             FC_PORT_ROLE_FCP_INITIATOR
 159 #define FC_RPORT_ROLE_IP_PORT                   FC_PORT_ROLE_IP_PORT
 160 
 161 
 162 /* Macro for use in defining Virtual Port attributes */
 163 #define FC_VPORT_ATTR(_name,_mode,_show,_store)         \
 164 struct device_attribute dev_attr_vport_##_name =        \
 165         __ATTR(_name,_mode,_show,_store)
 166 
 167 /*
 168  * fc_vport_identifiers: This set of data contains all elements
 169  * to uniquely identify and instantiate a FC virtual port.
 170  *
 171  * Notes:
 172  *   symbolic_name: The driver is to append the symbolic_name string data
 173  *      to the symbolic_node_name data that it generates by default.
 174  *      the resulting combination should then be registered with the switch.
 175  *      It is expected that things like Xen may stuff a VM title into
 176  *      this field.
 177  */
 178 #define FC_VPORT_SYMBOLIC_NAMELEN               64
 179 struct fc_vport_identifiers {
 180         u64 node_name;
 181         u64 port_name;
 182         u32 roles;
 183         bool disable;
 184         enum fc_port_type vport_type;   /* only FC_PORTTYPE_NPIV allowed */
 185         char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN];
 186 };
 187 
 188 /*
 189  * FC Virtual Port Attributes
 190  *
 191  * This structure exists for each FC port is a virtual FC port. Virtual
 192  * ports share the physical link with the Physical port. Each virtual
 193  * ports has a unique presence on the SAN, and may be instantiated via
 194  * NPIV, Virtual Fabrics, or via additional ALPAs. As the vport is a
 195  * unique presence, each vport has it's own view of the fabric,
 196  * authentication privilege, and priorities.
 197  *
 198  * A virtual port may support 1 or more FC4 roles. Typically it is a
 199  * FCP Initiator. It could be a FCP Target, or exist sole for an IP over FC
 200  * roles. FC port attributes for the vport will be reported on any
 201  * fc_host class object allocated for an FCP Initiator.
 202  *
 203  * --
 204  *
 205  * Fixed attributes are not expected to change. The driver is
 206  * expected to set these values after receiving the fc_vport structure
 207  * via the vport_create() call from the transport.
 208  * The transport fully manages all get functions w/o driver interaction.
 209  *
 210  * Dynamic attributes are expected to change. The driver participates
 211  * in all get/set operations via functions provided by the driver.
 212  *
 213  * Private attributes are transport-managed values. They are fully
 214  * managed by the transport w/o driver interaction.
 215  */
 216 
 217 struct fc_vport {
 218         /* Fixed Attributes */
 219 
 220         /* Dynamic Attributes */
 221 
 222         /* Private (Transport-managed) Attributes */
 223         enum fc_vport_state vport_state;
 224         enum fc_vport_state vport_last_state;
 225         u64 node_name;
 226         u64 port_name;
 227         u32 roles;
 228         u32 vport_id;           /* Admin Identifier for the vport */
 229         enum fc_port_type vport_type;
 230         char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN];
 231 
 232         /* exported data */
 233         void *dd_data;                  /* Used for driver-specific storage */
 234 
 235         /* internal data */
 236         struct Scsi_Host *shost;        /* Physical Port Parent */
 237         unsigned int channel;
 238         u32 number;
 239         u8 flags;
 240         struct list_head peers;
 241         struct device dev;
 242         struct work_struct vport_delete_work;
 243 } __attribute__((aligned(sizeof(unsigned long))));
 244 
 245 /* bit field values for struct fc_vport "flags" field: */
 246 #define FC_VPORT_CREATING               0x01
 247 #define FC_VPORT_DELETING               0x02
 248 #define FC_VPORT_DELETED                0x04
 249 #define FC_VPORT_DEL                    0x06    /* Any DELETE state */
 250 
 251 #define dev_to_vport(d)                         \
 252         container_of(d, struct fc_vport, dev)
 253 #define transport_class_to_vport(dev)           \
 254         dev_to_vport(dev->parent)
 255 #define vport_to_shost(v)                       \
 256         (v->shost)
 257 #define vport_to_shost_channel(v)               \
 258         (v->channel)
 259 #define vport_to_parent(v)                      \
 260         (v->dev.parent)
 261 
 262 
 263 /* Error return codes for vport_create() callback */
 264 #define VPCERR_UNSUPPORTED              -ENOSYS         /* no driver/adapter
 265                                                            support */
 266 #define VPCERR_BAD_WWN                  -ENOTUNIQ       /* driver validation
 267                                                            of WWNs failed */
 268 #define VPCERR_NO_FABRIC_SUPP           -EOPNOTSUPP     /* Fabric connection
 269                                                            is loop or the
 270                                                            Fabric Port does
 271                                                            not support NPIV */
 272 
 273 /*
 274  * fc_rport_identifiers: This set of data contains all elements
 275  * to uniquely identify a remote FC port. The driver uses this data
 276  * to report the existence of a remote FC port in the topology. Internally,
 277  * the transport uses this data for attributes and to manage consistent
 278  * target id bindings.
 279  */
 280 struct fc_rport_identifiers {
 281         u64 node_name;
 282         u64 port_name;
 283         u32 port_id;
 284         u32 roles;
 285 };
 286 
 287 
 288 /* Macro for use in defining Remote Port attributes */
 289 #define FC_RPORT_ATTR(_name,_mode,_show,_store)                         \
 290 struct device_attribute dev_attr_rport_##_name =        \
 291         __ATTR(_name,_mode,_show,_store)
 292 
 293 
 294 /*
 295  * FC Remote Port Attributes
 296  *
 297  * This structure exists for each remote FC port that a LLDD notifies
 298  * the subsystem of.  A remote FC port may or may not be a SCSI Target,
 299  * also be a SCSI initiator, IP endpoint, etc. As such, the remote
 300  * port is considered a separate entity, independent of "role" (such
 301  * as scsi target).
 302  *
 303  * --
 304  *
 305  * Attributes are based on HBAAPI V2.0 definitions. Only those
 306  * attributes that are determinable by the local port (aka Host)
 307  * are contained.
 308  *
 309  * Fixed attributes are not expected to change. The driver is
 310  * expected to set these values after successfully calling
 311  * fc_remote_port_add(). The transport fully manages all get functions
 312  * w/o driver interaction.
 313  *
 314  * Dynamic attributes are expected to change. The driver participates
 315  * in all get/set operations via functions provided by the driver.
 316  *
 317  * Private attributes are transport-managed values. They are fully
 318  * managed by the transport w/o driver interaction.
 319  */
 320 
 321 struct fc_rport {       /* aka fc_starget_attrs */
 322         /* Fixed Attributes */
 323         u32 maxframe_size;
 324         u32 supported_classes;
 325 
 326         /* Dynamic Attributes */
 327         u32 dev_loss_tmo;       /* Remote Port loss timeout in seconds. */
 328 
 329         /* Private (Transport-managed) Attributes */
 330         u64 node_name;
 331         u64 port_name;
 332         u32 port_id;
 333         u32 roles;
 334         enum fc_port_state port_state;  /* Will only be ONLINE or UNKNOWN */
 335         u32 scsi_target_id;
 336         u32 fast_io_fail_tmo;
 337 
 338         /* exported data */
 339         void *dd_data;                  /* Used for driver-specific storage */
 340 
 341         /* internal data */
 342         unsigned int channel;
 343         u32 number;
 344         u8 flags;
 345         struct list_head peers;
 346         struct device dev;
 347         struct delayed_work dev_loss_work;
 348         struct work_struct scan_work;
 349         struct delayed_work fail_io_work;
 350         struct work_struct stgt_delete_work;
 351         struct work_struct rport_delete_work;
 352         struct request_queue *rqst_q;   /* bsg support */
 353 } __attribute__((aligned(sizeof(unsigned long))));
 354 
 355 /* bit field values for struct fc_rport "flags" field: */
 356 #define FC_RPORT_DEVLOSS_PENDING        0x01
 357 #define FC_RPORT_SCAN_PENDING           0x02
 358 #define FC_RPORT_FAST_FAIL_TIMEDOUT     0x04
 359 #define FC_RPORT_DEVLOSS_CALLBK_DONE    0x08
 360 
 361 #define dev_to_rport(d)                         \
 362         container_of(d, struct fc_rport, dev)
 363 #define transport_class_to_rport(dev)   \
 364         dev_to_rport(dev->parent)
 365 #define rport_to_shost(r)                       \
 366         dev_to_shost(r->dev.parent)
 367 
 368 /*
 369  * FC SCSI Target Attributes
 370  *
 371  * The SCSI Target is considered an extension of a remote port (as
 372  * a remote port can be more than a SCSI Target). Within the scsi
 373  * subsystem, we leave the Target as a separate entity. Doing so
 374  * provides backward compatibility with prior FC transport api's,
 375  * and lets remote ports be handled entirely within the FC transport
 376  * and independently from the scsi subsystem. The drawback is that
 377  * some data will be duplicated.
 378  */
 379 
 380 struct fc_starget_attrs {       /* aka fc_target_attrs */
 381         /* Dynamic Attributes */
 382         u64 node_name;
 383         u64 port_name;
 384         u32 port_id;
 385 };
 386 
 387 #define fc_starget_node_name(x) \
 388         (((struct fc_starget_attrs *)&(x)->starget_data)->node_name)
 389 #define fc_starget_port_name(x) \
 390         (((struct fc_starget_attrs *)&(x)->starget_data)->port_name)
 391 #define fc_starget_port_id(x) \
 392         (((struct fc_starget_attrs *)&(x)->starget_data)->port_id)
 393 
 394 #define starget_to_rport(s)                     \
 395         scsi_is_fc_rport(s->dev.parent) ? dev_to_rport(s->dev.parent) : NULL
 396 
 397 
 398 /*
 399  * FC Local Port (Host) Statistics
 400  */
 401 
 402 /* FC Statistics - Following FC HBAAPI v2.0 guidelines */
 403 struct fc_host_statistics {
 404         /* port statistics */
 405         u64 seconds_since_last_reset;
 406         u64 tx_frames;
 407         u64 tx_words;
 408         u64 rx_frames;
 409         u64 rx_words;
 410         u64 lip_count;
 411         u64 nos_count;
 412         u64 error_frames;
 413         u64 dumped_frames;
 414         u64 link_failure_count;
 415         u64 loss_of_sync_count;
 416         u64 loss_of_signal_count;
 417         u64 prim_seq_protocol_err_count;
 418         u64 invalid_tx_word_count;
 419         u64 invalid_crc_count;
 420 
 421         /* fc4 statistics  (only FCP supported currently) */
 422         u64 fcp_input_requests;
 423         u64 fcp_output_requests;
 424         u64 fcp_control_requests;
 425         u64 fcp_input_megabytes;
 426         u64 fcp_output_megabytes;
 427         u64 fcp_packet_alloc_failures;  /* fcp packet allocation failures */
 428         u64 fcp_packet_aborts;          /* fcp packet aborted */
 429         u64 fcp_frame_alloc_failures;   /* fcp frame allocation failures */
 430 
 431         /* fc exches statistics */
 432         u64 fc_no_free_exch;            /* no free exch memory */
 433         u64 fc_no_free_exch_xid;        /* no free exch id */
 434         u64 fc_xid_not_found;           /* exch not found for a response */
 435         u64 fc_xid_busy;                /* exch exist for new a request */
 436         u64 fc_seq_not_found;           /* seq is not found for exchange */
 437         u64 fc_non_bls_resp;            /* a non BLS response frame with
 438                                            a sequence responder in new exch */
 439 };
 440 
 441 
 442 /*
 443  * FC Event Codes - Polled and Async, following FC HBAAPI v2.0 guidelines
 444  */
 445 
 446 /*
 447  * fc_host_event_code: If you alter this, you also need to alter
 448  * scsi_transport_fc.c (for the ascii descriptions).
 449  */
 450 enum fc_host_event_code  {
 451         FCH_EVT_LIP                     = 0x1,
 452         FCH_EVT_LINKUP                  = 0x2,
 453         FCH_EVT_LINKDOWN                = 0x3,
 454         FCH_EVT_LIPRESET                = 0x4,
 455         FCH_EVT_RSCN                    = 0x5,
 456         FCH_EVT_ADAPTER_CHANGE          = 0x103,
 457         FCH_EVT_PORT_UNKNOWN            = 0x200,
 458         FCH_EVT_PORT_OFFLINE            = 0x201,
 459         FCH_EVT_PORT_ONLINE             = 0x202,
 460         FCH_EVT_PORT_FABRIC             = 0x204,
 461         FCH_EVT_LINK_UNKNOWN            = 0x500,
 462         FCH_EVT_LINK_FPIN               = 0x501,
 463         FCH_EVT_VENDOR_UNIQUE           = 0xffff,
 464 };
 465 
 466 
 467 /*
 468  * FC Local Port (Host) Attributes
 469  *
 470  * Attributes are based on HBAAPI V2.0 definitions.
 471  * Note: OSDeviceName is determined by user-space library
 472  *
 473  * Fixed attributes are not expected to change. The driver is
 474  * expected to set these values after successfully calling scsi_add_host().
 475  * The transport fully manages all get functions w/o driver interaction.
 476  *
 477  * Dynamic attributes are expected to change. The driver participates
 478  * in all get/set operations via functions provided by the driver.
 479  *
 480  * Private attributes are transport-managed values. They are fully
 481  * managed by the transport w/o driver interaction.
 482  */
 483 
 484 #define FC_FC4_LIST_SIZE                32
 485 #define FC_SYMBOLIC_NAME_SIZE           256
 486 #define FC_VERSION_STRING_SIZE          64
 487 #define FC_SERIAL_NUMBER_SIZE           80
 488 
 489 struct fc_host_attrs {
 490         /* Fixed Attributes */
 491         u64 node_name;
 492         u64 port_name;
 493         u64 permanent_port_name;
 494         u32 supported_classes;
 495         u8  supported_fc4s[FC_FC4_LIST_SIZE];
 496         u32 supported_speeds;
 497         u32 maxframe_size;
 498         u16 max_npiv_vports;
 499         char serial_number[FC_SERIAL_NUMBER_SIZE];
 500         char manufacturer[FC_SERIAL_NUMBER_SIZE];
 501         char model[FC_SYMBOLIC_NAME_SIZE];
 502         char model_description[FC_SYMBOLIC_NAME_SIZE];
 503         char hardware_version[FC_VERSION_STRING_SIZE];
 504         char driver_version[FC_VERSION_STRING_SIZE];
 505         char firmware_version[FC_VERSION_STRING_SIZE];
 506         char optionrom_version[FC_VERSION_STRING_SIZE];
 507 
 508         /* Dynamic Attributes */
 509         u32 port_id;
 510         enum fc_port_type port_type;
 511         enum fc_port_state port_state;
 512         u8  active_fc4s[FC_FC4_LIST_SIZE];
 513         u32 speed;
 514         u64 fabric_name;
 515         char symbolic_name[FC_SYMBOLIC_NAME_SIZE];
 516         char system_hostname[FC_SYMBOLIC_NAME_SIZE];
 517         u32 dev_loss_tmo;
 518 
 519         /* Private (Transport-managed) Attributes */
 520         enum fc_tgtid_binding_type  tgtid_bind_type;
 521 
 522         /* internal data */
 523         struct list_head rports;
 524         struct list_head rport_bindings;
 525         struct list_head vports;
 526         u32 next_rport_number;
 527         u32 next_target_id;
 528         u32 next_vport_number;
 529         u16 npiv_vports_inuse;
 530 
 531         /* work queues for rport state manipulation */
 532         char work_q_name[20];
 533         struct workqueue_struct *work_q;
 534         char devloss_work_q_name[20];
 535         struct workqueue_struct *devloss_work_q;
 536 
 537         /* bsg support */
 538         struct request_queue *rqst_q;
 539 };
 540 
 541 #define shost_to_fc_host(x) \
 542         ((struct fc_host_attrs *)(x)->shost_data)
 543 
 544 #define fc_host_node_name(x) \
 545         (((struct fc_host_attrs *)(x)->shost_data)->node_name)
 546 #define fc_host_port_name(x)    \
 547         (((struct fc_host_attrs *)(x)->shost_data)->port_name)
 548 #define fc_host_permanent_port_name(x)  \
 549         (((struct fc_host_attrs *)(x)->shost_data)->permanent_port_name)
 550 #define fc_host_supported_classes(x)    \
 551         (((struct fc_host_attrs *)(x)->shost_data)->supported_classes)
 552 #define fc_host_supported_fc4s(x)       \
 553         (((struct fc_host_attrs *)(x)->shost_data)->supported_fc4s)
 554 #define fc_host_supported_speeds(x)     \
 555         (((struct fc_host_attrs *)(x)->shost_data)->supported_speeds)
 556 #define fc_host_maxframe_size(x)        \
 557         (((struct fc_host_attrs *)(x)->shost_data)->maxframe_size)
 558 #define fc_host_max_npiv_vports(x)      \
 559         (((struct fc_host_attrs *)(x)->shost_data)->max_npiv_vports)
 560 #define fc_host_serial_number(x)        \
 561         (((struct fc_host_attrs *)(x)->shost_data)->serial_number)
 562 #define fc_host_manufacturer(x) \
 563         (((struct fc_host_attrs *)(x)->shost_data)->manufacturer)
 564 #define fc_host_model(x)        \
 565         (((struct fc_host_attrs *)(x)->shost_data)->model)
 566 #define fc_host_model_description(x)    \
 567         (((struct fc_host_attrs *)(x)->shost_data)->model_description)
 568 #define fc_host_hardware_version(x)     \
 569         (((struct fc_host_attrs *)(x)->shost_data)->hardware_version)
 570 #define fc_host_driver_version(x)       \
 571         (((struct fc_host_attrs *)(x)->shost_data)->driver_version)
 572 #define fc_host_firmware_version(x)     \
 573         (((struct fc_host_attrs *)(x)->shost_data)->firmware_version)
 574 #define fc_host_optionrom_version(x)    \
 575         (((struct fc_host_attrs *)(x)->shost_data)->optionrom_version)
 576 #define fc_host_port_id(x)      \
 577         (((struct fc_host_attrs *)(x)->shost_data)->port_id)
 578 #define fc_host_port_type(x)    \
 579         (((struct fc_host_attrs *)(x)->shost_data)->port_type)
 580 #define fc_host_port_state(x)   \
 581         (((struct fc_host_attrs *)(x)->shost_data)->port_state)
 582 #define fc_host_active_fc4s(x)  \
 583         (((struct fc_host_attrs *)(x)->shost_data)->active_fc4s)
 584 #define fc_host_speed(x)        \
 585         (((struct fc_host_attrs *)(x)->shost_data)->speed)
 586 #define fc_host_fabric_name(x)  \
 587         (((struct fc_host_attrs *)(x)->shost_data)->fabric_name)
 588 #define fc_host_symbolic_name(x)        \
 589         (((struct fc_host_attrs *)(x)->shost_data)->symbolic_name)
 590 #define fc_host_system_hostname(x)      \
 591         (((struct fc_host_attrs *)(x)->shost_data)->system_hostname)
 592 #define fc_host_tgtid_bind_type(x) \
 593         (((struct fc_host_attrs *)(x)->shost_data)->tgtid_bind_type)
 594 #define fc_host_rports(x) \
 595         (((struct fc_host_attrs *)(x)->shost_data)->rports)
 596 #define fc_host_rport_bindings(x) \
 597         (((struct fc_host_attrs *)(x)->shost_data)->rport_bindings)
 598 #define fc_host_vports(x) \
 599         (((struct fc_host_attrs *)(x)->shost_data)->vports)
 600 #define fc_host_next_rport_number(x) \
 601         (((struct fc_host_attrs *)(x)->shost_data)->next_rport_number)
 602 #define fc_host_next_target_id(x) \
 603         (((struct fc_host_attrs *)(x)->shost_data)->next_target_id)
 604 #define fc_host_next_vport_number(x) \
 605         (((struct fc_host_attrs *)(x)->shost_data)->next_vport_number)
 606 #define fc_host_npiv_vports_inuse(x)    \
 607         (((struct fc_host_attrs *)(x)->shost_data)->npiv_vports_inuse)
 608 #define fc_host_work_q_name(x) \
 609         (((struct fc_host_attrs *)(x)->shost_data)->work_q_name)
 610 #define fc_host_work_q(x) \
 611         (((struct fc_host_attrs *)(x)->shost_data)->work_q)
 612 #define fc_host_devloss_work_q_name(x) \
 613         (((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q_name)
 614 #define fc_host_devloss_work_q(x) \
 615         (((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q)
 616 #define fc_host_dev_loss_tmo(x) \
 617         (((struct fc_host_attrs *)(x)->shost_data)->dev_loss_tmo)
 618 
 619 /* The functions by which the transport class and the driver communicate */
 620 struct fc_function_template {
 621         void    (*get_rport_dev_loss_tmo)(struct fc_rport *);
 622         void    (*set_rport_dev_loss_tmo)(struct fc_rport *, u32);
 623 
 624         void    (*get_starget_node_name)(struct scsi_target *);
 625         void    (*get_starget_port_name)(struct scsi_target *);
 626         void    (*get_starget_port_id)(struct scsi_target *);
 627 
 628         void    (*get_host_port_id)(struct Scsi_Host *);
 629         void    (*get_host_port_type)(struct Scsi_Host *);
 630         void    (*get_host_port_state)(struct Scsi_Host *);
 631         void    (*get_host_active_fc4s)(struct Scsi_Host *);
 632         void    (*get_host_speed)(struct Scsi_Host *);
 633         void    (*get_host_fabric_name)(struct Scsi_Host *);
 634         void    (*get_host_symbolic_name)(struct Scsi_Host *);
 635         void    (*set_host_system_hostname)(struct Scsi_Host *);
 636 
 637         struct fc_host_statistics * (*get_fc_host_stats)(struct Scsi_Host *);
 638         void    (*reset_fc_host_stats)(struct Scsi_Host *);
 639 
 640         int     (*issue_fc_host_lip)(struct Scsi_Host *);
 641 
 642         void    (*dev_loss_tmo_callbk)(struct fc_rport *);
 643         void    (*terminate_rport_io)(struct fc_rport *);
 644 
 645         void    (*set_vport_symbolic_name)(struct fc_vport *);
 646         int     (*vport_create)(struct fc_vport *, bool);
 647         int     (*vport_disable)(struct fc_vport *, bool);
 648         int     (*vport_delete)(struct fc_vport *);
 649 
 650         /* bsg support */
 651         int     (*bsg_request)(struct bsg_job *);
 652         int     (*bsg_timeout)(struct bsg_job *);
 653 
 654         /* allocation lengths for host-specific data */
 655         u32                             dd_fcrport_size;
 656         u32                             dd_fcvport_size;
 657         u32                             dd_bsg_size;
 658 
 659         /*
 660          * The driver sets these to tell the transport class it
 661          * wants the attributes displayed in sysfs.  If the show_ flag
 662          * is not set, the attribute will be private to the transport
 663          * class
 664          */
 665 
 666         /* remote port fixed attributes */
 667         unsigned long   show_rport_maxframe_size:1;
 668         unsigned long   show_rport_supported_classes:1;
 669         unsigned long   show_rport_dev_loss_tmo:1;
 670 
 671         /*
 672          * target dynamic attributes
 673          * These should all be "1" if the driver uses the remote port
 674          * add/delete functions (so attributes reflect rport values).
 675          */
 676         unsigned long   show_starget_node_name:1;
 677         unsigned long   show_starget_port_name:1;
 678         unsigned long   show_starget_port_id:1;
 679 
 680         /* host fixed attributes */
 681         unsigned long   show_host_node_name:1;
 682         unsigned long   show_host_port_name:1;
 683         unsigned long   show_host_permanent_port_name:1;
 684         unsigned long   show_host_supported_classes:1;
 685         unsigned long   show_host_supported_fc4s:1;
 686         unsigned long   show_host_supported_speeds:1;
 687         unsigned long   show_host_maxframe_size:1;
 688         unsigned long   show_host_serial_number:1;
 689         unsigned long   show_host_manufacturer:1;
 690         unsigned long   show_host_model:1;
 691         unsigned long   show_host_model_description:1;
 692         unsigned long   show_host_hardware_version:1;
 693         unsigned long   show_host_driver_version:1;
 694         unsigned long   show_host_firmware_version:1;
 695         unsigned long   show_host_optionrom_version:1;
 696         /* host dynamic attributes */
 697         unsigned long   show_host_port_id:1;
 698         unsigned long   show_host_port_type:1;
 699         unsigned long   show_host_port_state:1;
 700         unsigned long   show_host_active_fc4s:1;
 701         unsigned long   show_host_speed:1;
 702         unsigned long   show_host_fabric_name:1;
 703         unsigned long   show_host_symbolic_name:1;
 704         unsigned long   show_host_system_hostname:1;
 705 
 706         unsigned long   disable_target_scan:1;
 707 };
 708 
 709 
 710 /**
 711  * fc_remote_port_chkready - called to validate the remote port state
 712  *   prior to initiating io to the port.
 713  *
 714  * Returns a scsi result code that can be returned by the LLDD.
 715  *
 716  * @rport:      remote port to be checked
 717  **/
 718 static inline int
 719 fc_remote_port_chkready(struct fc_rport *rport)
 720 {
 721         int result;
 722 
 723         switch (rport->port_state) {
 724         case FC_PORTSTATE_ONLINE:
 725                 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
 726                         result = 0;
 727                 else if (rport->flags & FC_RPORT_DEVLOSS_PENDING)
 728                         result = DID_IMM_RETRY << 16;
 729                 else
 730                         result = DID_NO_CONNECT << 16;
 731                 break;
 732         case FC_PORTSTATE_BLOCKED:
 733                 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
 734                         result = DID_TRANSPORT_FAILFAST << 16;
 735                 else
 736                         result = DID_IMM_RETRY << 16;
 737                 break;
 738         default:
 739                 result = DID_NO_CONNECT << 16;
 740                 break;
 741         }
 742         return result;
 743 }
 744 
 745 static inline u64 wwn_to_u64(const u8 *wwn)
 746 {
 747         return get_unaligned_be64(wwn);
 748 }
 749 
 750 static inline void u64_to_wwn(u64 inm, u8 *wwn)
 751 {
 752         put_unaligned_be64(inm, wwn);
 753 }
 754 
 755 /**
 756  * fc_vport_set_state() - called to set a vport's state. Saves the old state,
 757  *   excepting the transitory states of initializing and sending the ELS
 758  *   traffic to instantiate the vport on the link.
 759  *
 760  * Assumes the driver has surrounded this with the proper locking to ensure
 761  * a coherent state change.
 762  *
 763  * @vport:      virtual port whose state is changing
 764  * @new_state:  new state
 765  **/
 766 static inline void
 767 fc_vport_set_state(struct fc_vport *vport, enum fc_vport_state new_state)
 768 {
 769         if ((new_state != FC_VPORT_UNKNOWN) &&
 770             (new_state != FC_VPORT_INITIALIZING))
 771                 vport->vport_last_state = vport->vport_state;
 772         vport->vport_state = new_state;
 773 }
 774 
 775 struct scsi_transport_template *fc_attach_transport(
 776                         struct fc_function_template *);
 777 void fc_release_transport(struct scsi_transport_template *);
 778 void fc_remove_host(struct Scsi_Host *);
 779 struct fc_rport *fc_remote_port_add(struct Scsi_Host *shost,
 780                         int channel, struct fc_rport_identifiers  *ids);
 781 void fc_remote_port_delete(struct fc_rport  *rport);
 782 void fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles);
 783 int scsi_is_fc_rport(const struct device *);
 784 u32 fc_get_event_number(void);
 785 void fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
 786                 enum fc_host_event_code event_code, u32 event_data);
 787 void fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
 788                 u32 data_len, char *data_buf, u64 vendor_id);
 789 void fc_host_post_fc_event(struct Scsi_Host *shost, u32 event_number,
 790                 enum fc_host_event_code event_code,
 791                 u32 data_len, char *data_buf, u64 vendor_id);
 792         /* Note: when specifying vendor_id to fc_host_post_vendor_event()
 793          *   or fc_host_post_fc_event(), be sure to read the Vendor Type
 794          *   and ID formatting requirements specified in scsi_netlink.h
 795          * Note: when calling fc_host_post_fc_event(), vendor_id may be
 796          *   specified as 0.
 797          */
 798 void fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf);
 799 struct fc_vport *fc_vport_create(struct Scsi_Host *shost, int channel,
 800                 struct fc_vport_identifiers *);
 801 int fc_vport_terminate(struct fc_vport *vport);
 802 int fc_block_rport(struct fc_rport *rport);
 803 int fc_block_scsi_eh(struct scsi_cmnd *cmnd);
 804 enum blk_eh_timer_return fc_eh_timed_out(struct scsi_cmnd *scmd);
 805 
 806 static inline struct Scsi_Host *fc_bsg_to_shost(struct bsg_job *job)
 807 {
 808         if (scsi_is_host_device(job->dev))
 809                 return dev_to_shost(job->dev);
 810         return rport_to_shost(dev_to_rport(job->dev));
 811 }
 812 
 813 static inline struct fc_rport *fc_bsg_to_rport(struct bsg_job *job)
 814 {
 815         if (scsi_is_fc_rport(job->dev))
 816                 return dev_to_rport(job->dev);
 817         return NULL;
 818 }
 819 
 820 #endif /* SCSI_TRANSPORT_FC_H */