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_20GBIT             0x80
 135 #define FC_PORTSPEED_40GBIT             0x100
 136 #define FC_PORTSPEED_50GBIT             0x200
 137 #define FC_PORTSPEED_100GBIT            0x400
 138 #define FC_PORTSPEED_25GBIT             0x800
 139 #define FC_PORTSPEED_NOT_NEGOTIATED     (1 << 15) /* Speed not established */
 140
 141 /*
 142  * fc_tgtid_binding_type: If you alter this, you also need to alter
 143  * scsi_transport_fc.c (for the ascii descriptions).
 144  */
 145 enum fc_tgtid_binding_type  {
 146         FC_TGTID_BIND_NONE,
 147         FC_TGTID_BIND_BY_WWPN,
 148         FC_TGTID_BIND_BY_WWNN,
 149         FC_TGTID_BIND_BY_ID,
 150 };
 151
 152 /*
 153  * FC Port Roles
 154  * Note: values are not enumerated, as they can be "or'd" together
 155  * for reporting (e.g. report roles). If you alter this list,
 156  * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
 157  */
 158 #define FC_PORT_ROLE_UNKNOWN                    0x00
 159 #define FC_PORT_ROLE_FCP_TARGET                 0x01
 160 #define FC_PORT_ROLE_FCP_INITIATOR              0x02
 161 #define FC_PORT_ROLE_IP_PORT                    0x04
 162
 163 /* The following are for compatibility */
 164 #define FC_RPORT_ROLE_UNKNOWN                   FC_PORT_ROLE_UNKNOWN
 165 #define FC_RPORT_ROLE_FCP_TARGET                FC_PORT_ROLE_FCP_TARGET
 166 #define FC_RPORT_ROLE_FCP_INITIATOR             FC_PORT_ROLE_FCP_INITIATOR
 167 #define FC_RPORT_ROLE_IP_PORT                   FC_PORT_ROLE_IP_PORT
 168
 169
 170 /* Macro for use in defining Virtual Port attributes */
 171 #define FC_VPORT_ATTR(_name,_mode,_show,_store)         \
 172 struct device_attribute dev_attr_vport_##_name =        \
 173         __ATTR(_name,_mode,_show,_store)
 174
 175 /*
 176  * fc_vport_identifiers: This set of data contains all elements
 177  * to uniquely identify and instantiate a FC virtual port.
 178  *
 179  * Notes:
 180  *   symbolic_name: The driver is to append the symbolic_name string data
 181  *      to the symbolic_node_name data that it generates by default.
 182  *      the resulting combination should then be registered with the switch.
 183  *      It is expected that things like Xen may stuff a VM title into
 184  *      this field.
 185  */
 186 #define FC_VPORT_SYMBOLIC_NAMELEN               64
 187 struct fc_vport_identifiers {
 188         u64 node_name;
 189         u64 port_name;
 190         u32 roles;
 191         bool disable;
 192         enum fc_port_type vport_type;   /* only FC_PORTTYPE_NPIV allowed */
 193         char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN];
 194 };
 195
 196 /*
 197  * FC Virtual Port Attributes
 198  *
 199  * This structure exists for each FC port is a virtual FC port. Virtual
 200  * ports share the physical link with the Physical port. Each virtual
 201  * ports has a unique presence on the SAN, and may be instantiated via
 202  * NPIV, Virtual Fabrics, or via additional ALPAs. As the vport is a
 203  * unique presence, each vport has it's own view of the fabric,
 204  * authentication privilege, and priorities.
 205  *
 206  * A virtual port may support 1 or more FC4 roles. Typically it is a
 207  * FCP Initiator. It could be a FCP Target, or exist sole for an IP over FC
 208  * roles. FC port attributes for the vport will be reported on any
 209  * fc_host class object allocated for an FCP Initiator.
 210  *
 211  * --
 212  *
 213  * Fixed attributes are not expected to change. The driver is
 214  * expected to set these values after receiving the fc_vport structure
 215  * via the vport_create() call from the transport.
 216  * The transport fully manages all get functions w/o driver interaction.
 217  *
 218  * Dynamic attributes are expected to change. The driver participates
 219  * in all get/set operations via functions provided by the driver.
 220  *
 221  * Private attributes are transport-managed values. They are fully
 222  * managed by the transport w/o driver interaction.
 223  */
 224
 225 struct fc_vport {
 226         /* Fixed Attributes */
 227
 228         /* Dynamic Attributes */
 229
 230         /* Private (Transport-managed) Attributes */
 231         enum fc_vport_state vport_state;
 232         enum fc_vport_state vport_last_state;
 233         u64 node_name;
 234         u64 port_name;
 235         u32 roles;
 236         u32 vport_id;           /* Admin Identifier for the vport */
 237         enum fc_port_type vport_type;
 238         char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN];
 239
 240         /* exported data */
 241         void *dd_data;                  /* Used for driver-specific storage */
 242
 243         /* internal data */
 244         struct Scsi_Host *shost;        /* Physical Port Parent */
 245         unsigned int channel;
 246         u32 number;
 247         u8 flags;
 248         struct list_head peers;
 249         struct device dev;
 250         struct work_struct vport_delete_work;
 251 } __attribute__((aligned(sizeof(unsigned long))));
 252
 253 /* bit field values for struct fc_vport "flags" field: */
 254 #define FC_VPORT_CREATING               0x01
 255 #define FC_VPORT_DELETING               0x02
 256 #define FC_VPORT_DELETED                0x04
 257 #define FC_VPORT_DEL                    0x06    /* Any DELETE state */
 258
 259 #define dev_to_vport(d)                         \
 260         container_of(d, struct fc_vport, dev)
 261 #define transport_class_to_vport(dev)           \
 262         dev_to_vport(dev->parent)
 263 #define vport_to_shost(v)                       \
 264         (v->shost)
 265 #define vport_to_shost_channel(v)               \
 266         (v->channel)
 267 #define vport_to_parent(v)                      \
 268         (v->dev.parent)
 269
 270
 271 /* Error return codes for vport_create() callback */
 272 #define VPCERR_UNSUPPORTED              -ENOSYS         /* no driver/adapter
 273                                                            support */
 274 #define VPCERR_BAD_WWN                  -ENOTUNIQ       /* driver validation
 275                                                            of WWNs failed */
 276 #define VPCERR_NO_FABRIC_SUPP           -EOPNOTSUPP     /* Fabric connection
 277                                                            is loop or the
 278                                                            Fabric Port does
 279                                                            not support NPIV */
 280
 281 /*
 282  * fc_rport_identifiers: This set of data contains all elements
 283  * to uniquely identify a remote FC port. The driver uses this data
 284  * to report the existence of a remote FC port in the topology. Internally,
 285  * the transport uses this data for attributes and to manage consistent
 286  * target id bindings.
 287  */
 288 struct fc_rport_identifiers {
 289         u64 node_name;
 290         u64 port_name;
 291         u32 port_id;
 292         u32 roles;
 293 };
 294
 295
 296 /* Macro for use in defining Remote Port attributes */
 297 #define FC_RPORT_ATTR(_name,_mode,_show,_store)                         \
 298 struct device_attribute dev_attr_rport_##_name =        \
 299         __ATTR(_name,_mode,_show,_store)
 300
 301
 302 /*
 303  * FC Remote Port Attributes
 304  *
 305  * This structure exists for each remote FC port that a LLDD notifies
 306  * the subsystem of.  A remote FC port may or may not be a SCSI Target,
 307  * also be a SCSI initiator, IP endpoint, etc. As such, the remote
 308  * port is considered a separate entity, independent of "role" (such
 309  * as scsi target).
 310  *
 311  * --
 312  *
 313  * Attributes are based on HBAAPI V2.0 definitions. Only those
 314  * attributes that are determinable by the local port (aka Host)
 315  * are contained.
 316  *
 317  * Fixed attributes are not expected to change. The driver is
 318  * expected to set these values after successfully calling
 319  * fc_remote_port_add(). The transport fully manages all get functions
 320  * w/o driver interaction.
 321  *
 322  * Dynamic attributes are expected to change. The driver participates
 323  * in all get/set operations via functions provided by the driver.
 324  *
 325  * Private attributes are transport-managed values. They are fully
 326  * managed by the transport w/o driver interaction.
 327  */
 328
 329 struct fc_rport {       /* aka fc_starget_attrs */
 330         /* Fixed Attributes */
 331         u32 maxframe_size;
 332         u32 supported_classes;
 333
 334         /* Dynamic Attributes */
 335         u32 dev_loss_tmo;       /* Remote Port loss timeout in seconds. */
 336
 337         /* Private (Transport-managed) Attributes */
 338         u64 node_name;
 339         u64 port_name;
 340         u32 port_id;
 341         u32 roles;
 342         enum fc_port_state port_state;  /* Will only be ONLINE or UNKNOWN */
 343         u32 scsi_target_id;
 344         u32 fast_io_fail_tmo;
 345
 346         /* exported data */
 347         void *dd_data;                  /* Used for driver-specific storage */
 348
 349         /* internal data */
 350         unsigned int channel;
 351         u32 number;
 352         u8 flags;
 353         struct list_head peers;
 354         struct device dev;
 355         struct delayed_work dev_loss_work;
 356         struct work_struct scan_work;
 357         struct delayed_work fail_io_work;
 358         struct work_struct stgt_delete_work;
 359         struct work_struct rport_delete_work;
 360         struct request_queue *rqst_q;   /* bsg support */
 361 } __attribute__((aligned(sizeof(unsigned long))));
 362
 363 /* bit field values for struct fc_rport "flags" field: */
 364 #define FC_RPORT_DEVLOSS_PENDING        0x01
 365 #define FC_RPORT_SCAN_PENDING           0x02
 366 #define FC_RPORT_FAST_FAIL_TIMEDOUT     0x04
 367 #define FC_RPORT_DEVLOSS_CALLBK_DONE    0x08
 368
 369 #define dev_to_rport(d)                         \
 370         container_of(d, struct fc_rport, dev)
 371 #define transport_class_to_rport(dev)   \
 372         dev_to_rport(dev->parent)
 373 #define rport_to_shost(r)                       \
 374         dev_to_shost(r->dev.parent)
 375
 376 /*
 377  * FC SCSI Target Attributes
 378  *
 379  * The SCSI Target is considered an extension of a remote port (as
 380  * a remote port can be more than a SCSI Target). Within the scsi
 381  * subsystem, we leave the Target as a separate entity. Doing so
 382  * provides backward compatibility with prior FC transport api's,
 383  * and lets remote ports be handled entirely within the FC transport
 384  * and independently from the scsi subsystem. The drawback is that
 385  * some data will be duplicated.
 386  */
 387
 388 struct fc_starget_attrs {       /* aka fc_target_attrs */
 389         /* Dynamic Attributes */
 390         u64 node_name;
 391         u64 port_name;
 392         u32 port_id;
 393 };
 394
 395 #define fc_starget_node_name(x) \
 396         (((struct fc_starget_attrs *)&(x)->starget_data)->node_name)
 397 #define fc_starget_port_name(x) \
 398         (((struct fc_starget_attrs *)&(x)->starget_data)->port_name)
 399 #define fc_starget_port_id(x) \
 400         (((struct fc_starget_attrs *)&(x)->starget_data)->port_id)
 401
 402 #define starget_to_rport(s)                     \
 403         scsi_is_fc_rport(s->dev.parent) ? dev_to_rport(s->dev.parent) : NULL
 404
 405
 406 /*
 407  * FC Local Port (Host) Statistics
 408  */
 409
 410 /* FC Statistics - Following FC HBAAPI v2.0 guidelines */
 411 struct fc_host_statistics {
 412         /* port statistics */
 413         u64 seconds_since_last_reset;
 414         u64 tx_frames;
 415         u64 tx_words;
 416         u64 rx_frames;
 417         u64 rx_words;
 418         u64 lip_count;
 419         u64 nos_count;
 420         u64 error_frames;
 421         u64 dumped_frames;
 422         u64 link_failure_count;
 423         u64 loss_of_sync_count;
 424         u64 loss_of_signal_count;
 425         u64 prim_seq_protocol_err_count;
 426         u64 invalid_tx_word_count;
 427         u64 invalid_crc_count;
 428
 429         /* fc4 statistics  (only FCP supported currently) */
 430         u64 fcp_input_requests;
 431         u64 fcp_output_requests;
 432         u64 fcp_control_requests;
 433         u64 fcp_input_megabytes;
 434         u64 fcp_output_megabytes;
 435         u64 fcp_packet_alloc_failures;  /* fcp packet allocation failures */
 436         u64 fcp_packet_aborts;          /* fcp packet aborted */
 437         u64 fcp_frame_alloc_failures;   /* fcp frame allocation failures */
 438
 439         /* fc exches statistics */
 440         u64 fc_no_free_exch;            /* no free exch memory */
 441         u64 fc_no_free_exch_xid;        /* no free exch id */
 442         u64 fc_xid_not_found;           /* exch not found for a response */
 443         u64 fc_xid_busy;                /* exch exist for new a request */
 444         u64 fc_seq_not_found;           /* seq is not found for exchange */
 445         u64 fc_non_bls_resp;            /* a non BLS response frame with
 446                                            a sequence responder in new exch */
 447 };
 448
 449
 450 /*
 451  * FC Event Codes - Polled and Async, following FC HBAAPI v2.0 guidelines
 452  */
 453
 454 /*
 455  * fc_host_event_code: If you alter this, you also need to alter
 456  * scsi_transport_fc.c (for the ascii descriptions).
 457  */
 458 enum fc_host_event_code  {
 459         FCH_EVT_LIP                     = 0x1,
 460         FCH_EVT_LINKUP                  = 0x2,
 461         FCH_EVT_LINKDOWN                = 0x3,
 462         FCH_EVT_LIPRESET                = 0x4,
 463         FCH_EVT_RSCN                    = 0x5,
 464         FCH_EVT_ADAPTER_CHANGE          = 0x103,
 465         FCH_EVT_PORT_UNKNOWN            = 0x200,
 466         FCH_EVT_PORT_OFFLINE            = 0x201,
 467         FCH_EVT_PORT_ONLINE             = 0x202,
 468         FCH_EVT_PORT_FABRIC             = 0x204,
 469         FCH_EVT_LINK_UNKNOWN            = 0x500,
 470         FCH_EVT_VENDOR_UNIQUE           = 0xffff,
 471 };
 472
 473
 474 /*
 475  * FC Local Port (Host) Attributes
 476  *
 477  * Attributes are based on HBAAPI V2.0 definitions.
 478  * Note: OSDeviceName is determined by user-space library
 479  *
 480  * Fixed attributes are not expected to change. The driver is
 481  * expected to set these values after successfully calling scsi_add_host().
 482  * The transport fully manages all get functions w/o driver interaction.
 483  *
 484  * Dynamic attributes are expected to change. The driver participates
 485  * in all get/set operations via functions provided by the driver.
 486  *
 487  * Private attributes are transport-managed values. They are fully
 488  * managed by the transport w/o driver interaction.
 489  */
 490
 491 #define FC_FC4_LIST_SIZE                32
 492 #define FC_SYMBOLIC_NAME_SIZE           256
 493 #define FC_VERSION_STRING_SIZE          64
 494 #define FC_SERIAL_NUMBER_SIZE           80
 495
 496 struct fc_host_attrs {
 497         /* Fixed Attributes */
 498         u64 node_name;
 499         u64 port_name;
 500         u64 permanent_port_name;
 501         u32 supported_classes;
 502         u8  supported_fc4s[FC_FC4_LIST_SIZE];
 503         u32 supported_speeds;
 504         u32 maxframe_size;
 505         u16 max_npiv_vports;
 506         char serial_number[FC_SERIAL_NUMBER_SIZE];
 507         char manufacturer[FC_SERIAL_NUMBER_SIZE];
 508         char model[FC_SYMBOLIC_NAME_SIZE];
 509         char model_description[FC_SYMBOLIC_NAME_SIZE];
 510         char hardware_version[FC_VERSION_STRING_SIZE];
 511         char driver_version[FC_VERSION_STRING_SIZE];
 512         char firmware_version[FC_VERSION_STRING_SIZE];
 513         char optionrom_version[FC_VERSION_STRING_SIZE];
 514
 515         /* Dynamic Attributes */
 516         u32 port_id;
 517         enum fc_port_type port_type;
 518         enum fc_port_state port_state;
 519         u8  active_fc4s[FC_FC4_LIST_SIZE];
 520         u32 speed;
 521         u64 fabric_name;
 522         char symbolic_name[FC_SYMBOLIC_NAME_SIZE];
 523         char system_hostname[FC_SYMBOLIC_NAME_SIZE];
 524         u32 dev_loss_tmo;
 525
 526         /* Private (Transport-managed) Attributes */
 527         enum fc_tgtid_binding_type  tgtid_bind_type;
 528
 529         /* internal data */
 530         struct list_head rports;
 531         struct list_head rport_bindings;
 532         struct list_head vports;
 533         u32 next_rport_number;
 534         u32 next_target_id;
 535         u32 next_vport_number;
 536         u16 npiv_vports_inuse;
 537
 538         /* work queues for rport state manipulation */
 539         char work_q_name[20];
 540         struct workqueue_struct *work_q;
 541         char devloss_work_q_name[20];
 542         struct workqueue_struct *devloss_work_q;
 543
 544         /* bsg support */
 545         struct request_queue *rqst_q;
 546 };
 547
 548 #define shost_to_fc_host(x) \
 549         ((struct fc_host_attrs *)(x)->shost_data)
 550
 551 #define fc_host_node_name(x) \
 552         (((struct fc_host_attrs *)(x)->shost_data)->node_name)
 553 #define fc_host_port_name(x)    \
 554         (((struct fc_host_attrs *)(x)->shost_data)->port_name)
 555 #define fc_host_permanent_port_name(x)  \
 556         (((struct fc_host_attrs *)(x)->shost_data)->permanent_port_name)
 557 #define fc_host_supported_classes(x)    \
 558         (((struct fc_host_attrs *)(x)->shost_data)->supported_classes)
 559 #define fc_host_supported_fc4s(x)       \
 560         (((struct fc_host_attrs *)(x)->shost_data)->supported_fc4s)
 561 #define fc_host_supported_speeds(x)     \
 562         (((struct fc_host_attrs *)(x)->shost_data)->supported_speeds)
 563 #define fc_host_maxframe_size(x)        \
 564         (((struct fc_host_attrs *)(x)->shost_data)->maxframe_size)
 565 #define fc_host_max_npiv_vports(x)      \
 566         (((struct fc_host_attrs *)(x)->shost_data)->max_npiv_vports)
 567 #define fc_host_serial_number(x)        \
 568         (((struct fc_host_attrs *)(x)->shost_data)->serial_number)
 569 #define fc_host_manufacturer(x) \
 570         (((struct fc_host_attrs *)(x)->shost_data)->manufacturer)
 571 #define fc_host_model(x)        \
 572         (((struct fc_host_attrs *)(x)->shost_data)->model)
 573 #define fc_host_model_description(x)    \
 574         (((struct fc_host_attrs *)(x)->shost_data)->model_description)
 575 #define fc_host_hardware_version(x)     \
 576         (((struct fc_host_attrs *)(x)->shost_data)->hardware_version)
 577 #define fc_host_driver_version(x)       \
 578         (((struct fc_host_attrs *)(x)->shost_data)->driver_version)
 579 #define fc_host_firmware_version(x)     \
 580         (((struct fc_host_attrs *)(x)->shost_data)->firmware_version)
 581 #define fc_host_optionrom_version(x)    \
 582         (((struct fc_host_attrs *)(x)->shost_data)->optionrom_version)
 583 #define fc_host_port_id(x)      \
 584         (((struct fc_host_attrs *)(x)->shost_data)->port_id)
 585 #define fc_host_port_type(x)    \
 586         (((struct fc_host_attrs *)(x)->shost_data)->port_type)
 587 #define fc_host_port_state(x)   \
 588         (((struct fc_host_attrs *)(x)->shost_data)->port_state)
 589 #define fc_host_active_fc4s(x)  \
 590         (((struct fc_host_attrs *)(x)->shost_data)->active_fc4s)
 591 #define fc_host_speed(x)        \
 592         (((struct fc_host_attrs *)(x)->shost_data)->speed)
 593 #define fc_host_fabric_name(x)  \
 594         (((struct fc_host_attrs *)(x)->shost_data)->fabric_name)
 595 #define fc_host_symbolic_name(x)        \
 596         (((struct fc_host_attrs *)(x)->shost_data)->symbolic_name)
 597 #define fc_host_system_hostname(x)      \
 598         (((struct fc_host_attrs *)(x)->shost_data)->system_hostname)
 599 #define fc_host_tgtid_bind_type(x) \
 600         (((struct fc_host_attrs *)(x)->shost_data)->tgtid_bind_type)
 601 #define fc_host_rports(x) \
 602         (((struct fc_host_attrs *)(x)->shost_data)->rports)
 603 #define fc_host_rport_bindings(x) \
 604         (((struct fc_host_attrs *)(x)->shost_data)->rport_bindings)
 605 #define fc_host_vports(x) \
 606         (((struct fc_host_attrs *)(x)->shost_data)->vports)
 607 #define fc_host_next_rport_number(x) \
 608         (((struct fc_host_attrs *)(x)->shost_data)->next_rport_number)
 609 #define fc_host_next_target_id(x) \
 610         (((struct fc_host_attrs *)(x)->shost_data)->next_target_id)
 611 #define fc_host_next_vport_number(x) \
 612         (((struct fc_host_attrs *)(x)->shost_data)->next_vport_number)
 613 #define fc_host_npiv_vports_inuse(x)    \
 614         (((struct fc_host_attrs *)(x)->shost_data)->npiv_vports_inuse)
 615 #define fc_host_work_q_name(x) \
 616         (((struct fc_host_attrs *)(x)->shost_data)->work_q_name)
 617 #define fc_host_work_q(x) \
 618         (((struct fc_host_attrs *)(x)->shost_data)->work_q)
 619 #define fc_host_devloss_work_q_name(x) \
 620         (((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q_name)
 621 #define fc_host_devloss_work_q(x) \
 622         (((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q)
 623 #define fc_host_dev_loss_tmo(x) \
 624         (((struct fc_host_attrs *)(x)->shost_data)->dev_loss_tmo)
 625
 626
 627 struct fc_bsg_buffer {
 628         unsigned int payload_len;
 629         int sg_cnt;
 630         struct scatterlist *sg_list;
 631 };
 632
 633 /* Values for fc_bsg_job->state_flags (bitflags) */
 634 #define FC_RQST_STATE_INPROGRESS        0
 635 #define FC_RQST_STATE_DONE              1
 636
 637 struct fc_bsg_job {
 638         struct Scsi_Host *shost;
 639         struct fc_rport *rport;
 640         struct device *dev;
 641         struct request *req;
 642         spinlock_t job_lock;
 643         unsigned int state_flags;
 644         unsigned int ref_cnt;
 645         void (*job_done)(struct fc_bsg_job *);
 646
 647         struct fc_bsg_request *request;
 648         struct fc_bsg_reply *reply;
 649         unsigned int request_len;
 650         unsigned int reply_len;
 651         /*
 652          * On entry : reply_len indicates the buffer size allocated for
 653          * the reply.
 654          *
 655          * Upon completion : the message handler must set reply_len
 656          *  to indicates the size of the reply to be returned to the
 657          *  caller.
 658          */
 659
 660         /* DMA payloads for the request/response */
 661         struct fc_bsg_buffer request_payload;
 662         struct fc_bsg_buffer reply_payload;
 663
 664         void *dd_data;                  /* Used for driver-specific storage */
 665 };
 666
 667
 668 /* The functions by which the transport class and the driver communicate */
 669 struct fc_function_template {
 670         void    (*get_rport_dev_loss_tmo)(struct fc_rport *);
 671         void    (*set_rport_dev_loss_tmo)(struct fc_rport *, u32);
 672
 673         void    (*get_starget_node_name)(struct scsi_target *);
 674         void    (*get_starget_port_name)(struct scsi_target *);
 675         void    (*get_starget_port_id)(struct scsi_target *);
 676
 677         void    (*get_host_port_id)(struct Scsi_Host *);
 678         void    (*get_host_port_type)(struct Scsi_Host *);
 679         void    (*get_host_port_state)(struct Scsi_Host *);
 680         void    (*get_host_active_fc4s)(struct Scsi_Host *);
 681         void    (*get_host_speed)(struct Scsi_Host *);
 682         void    (*get_host_fabric_name)(struct Scsi_Host *);
 683         void    (*get_host_symbolic_name)(struct Scsi_Host *);
 684         void    (*set_host_system_hostname)(struct Scsi_Host *);
 685
 686         struct fc_host_statistics * (*get_fc_host_stats)(struct Scsi_Host *);
 687         void    (*reset_fc_host_stats)(struct Scsi_Host *);
 688
 689         int     (*issue_fc_host_lip)(struct Scsi_Host *);
 690
 691         void    (*dev_loss_tmo_callbk)(struct fc_rport *);
 692         void    (*terminate_rport_io)(struct fc_rport *);
 693
 694         void    (*set_vport_symbolic_name)(struct fc_vport *);
 695         int     (*vport_create)(struct fc_vport *, bool);
 696         int     (*vport_disable)(struct fc_vport *, bool);
 697         int     (*vport_delete)(struct fc_vport *);
 698
 699         /* target-mode drivers' functions */
 700         int     (* tsk_mgmt_response)(struct Scsi_Host *, u64, u64, int);
 701         int     (* it_nexus_response)(struct Scsi_Host *, u64, int);
 702
 703         /* bsg support */
 704         int     (*bsg_request)(struct fc_bsg_job *);
 705         int     (*bsg_timeout)(struct fc_bsg_job *);
 706
 707         /* allocation lengths for host-specific data */
 708         u32                             dd_fcrport_size;
 709         u32                             dd_fcvport_size;
 710         u32                             dd_bsg_size;
 711
 712         /*
 713          * The driver sets these to tell the transport class it
 714          * wants the attributes displayed in sysfs.  If the show_ flag
 715          * is not set, the attribute will be private to the transport
 716          * class
 717          */
 718
 719         /* remote port fixed attributes */
 720         unsigned long   show_rport_maxframe_size:1;
 721         unsigned long   show_rport_supported_classes:1;
 722         unsigned long   show_rport_dev_loss_tmo:1;
 723
 724         /*
 725          * target dynamic attributes
 726          * These should all be "1" if the driver uses the remote port
 727          * add/delete functions (so attributes reflect rport values).
 728          */
 729         unsigned long   show_starget_node_name:1;
 730         unsigned long   show_starget_port_name:1;
 731         unsigned long   show_starget_port_id:1;
 732
 733         /* host fixed attributes */
 734         unsigned long   show_host_node_name:1;
 735         unsigned long   show_host_port_name:1;
 736         unsigned long   show_host_permanent_port_name:1;
 737         unsigned long   show_host_supported_classes:1;
 738         unsigned long   show_host_supported_fc4s:1;
 739         unsigned long   show_host_supported_speeds:1;
 740         unsigned long   show_host_maxframe_size:1;
 741         unsigned long   show_host_serial_number:1;
 742         unsigned long   show_host_manufacturer:1;
 743         unsigned long   show_host_model:1;
 744         unsigned long   show_host_model_description:1;
 745         unsigned long   show_host_hardware_version:1;
 746         unsigned long   show_host_driver_version:1;
 747         unsigned long   show_host_firmware_version:1;
 748         unsigned long   show_host_optionrom_version:1;
 749         /* host dynamic attributes */
 750         unsigned long   show_host_port_id:1;
 751         unsigned long   show_host_port_type:1;
 752         unsigned long   show_host_port_state:1;
 753         unsigned long   show_host_active_fc4s:1;
 754         unsigned long   show_host_speed:1;
 755         unsigned long   show_host_fabric_name:1;
 756         unsigned long   show_host_symbolic_name:1;
 757         unsigned long   show_host_system_hostname:1;
 758
 759         unsigned long   disable_target_scan:1;
 760 };
 761
 762
 763 /**
 764  * fc_remote_port_chkready - called to validate the remote port state
 765  *   prior to initiating io to the port.
 766  *
 767  * Returns a scsi result code that can be returned by the LLDD.
 768  *
 769  * @rport:      remote port to be checked
 770  **/
 771 static inline int
 772 fc_remote_port_chkready(struct fc_rport *rport)
 773 {
 774         int result;
 775
 776         switch (rport->port_state) {
 777         case FC_PORTSTATE_ONLINE:
 778                 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
 779                         result = 0;
 780                 else if (rport->flags & FC_RPORT_DEVLOSS_PENDING)
 781                         result = DID_IMM_RETRY << 16;
 782                 else
 783                         result = DID_NO_CONNECT << 16;
 784                 break;
 785         case FC_PORTSTATE_BLOCKED:
 786                 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
 787                         result = DID_TRANSPORT_FAILFAST << 16;
 788                 else
 789                         result = DID_IMM_RETRY << 16;
 790                 break;
 791         default:
 792                 result = DID_NO_CONNECT << 16;
 793                 break;
 794         }
 795         return result;
 796 }
 797
 798 static inline u64 wwn_to_u64(u8 *wwn)
 799 {
 800         return (u64)wwn[0] << 56 | (u64)wwn[1] << 48 |
 801             (u64)wwn[2] << 40 | (u64)wwn[3] << 32 |
 802             (u64)wwn[4] << 24 | (u64)wwn[5] << 16 |
 803             (u64)wwn[6] <<  8 | (u64)wwn[7];
 804 }
 805
 806 static inline void u64_to_wwn(u64 inm, u8 *wwn)
 807 {
 808         wwn[0] = (inm >> 56) & 0xff;
 809         wwn[1] = (inm >> 48) & 0xff;
 810         wwn[2] = (inm >> 40) & 0xff;
 811         wwn[3] = (inm >> 32) & 0xff;
 812         wwn[4] = (inm >> 24) & 0xff;
 813         wwn[5] = (inm >> 16) & 0xff;
 814         wwn[6] = (inm >> 8) & 0xff;
 815         wwn[7] = inm & 0xff;
 816 }
 817
 818 /**
 819  * fc_vport_set_state() - called to set a vport's state. Saves the old state,
 820  *   excepting the transitory states of initializing and sending the ELS
 821  *   traffic to instantiate the vport on the link.
 822  *
 823  * Assumes the driver has surrounded this with the proper locking to ensure
 824  * a coherent state change.
 825  *
 826  * @vport:      virtual port whose state is changing
 827  * @new_state:  new state
 828  **/
 829 static inline void
 830 fc_vport_set_state(struct fc_vport *vport, enum fc_vport_state new_state)
 831 {
 832         if ((new_state != FC_VPORT_UNKNOWN) &&
 833             (new_state != FC_VPORT_INITIALIZING))
 834                 vport->vport_last_state = vport->vport_state;
 835         vport->vport_state = new_state;
 836 }
 837
 838 struct scsi_transport_template *fc_attach_transport(
 839                         struct fc_function_template *);
 840 void fc_release_transport(struct scsi_transport_template *);
 841 void fc_remove_host(struct Scsi_Host *);
 842 struct fc_rport *fc_remote_port_add(struct Scsi_Host *shost,
 843                         int channel, struct fc_rport_identifiers  *ids);
 844 void fc_remote_port_delete(struct fc_rport  *rport);
 845 void fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles);
 846 int scsi_is_fc_rport(const struct device *);
 847 u32 fc_get_event_number(void);
 848 void fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
 849                 enum fc_host_event_code event_code, u32 event_data);
 850 void fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
 851                 u32 data_len, char * data_buf, u64 vendor_id);
 852         /* Note: when specifying vendor_id to fc_host_post_vendor_event()
 853          *   be sure to read the Vendor Type and ID formatting requirements
 854          *   specified in scsi_netlink.h
 855          */
 856 struct fc_vport *fc_vport_create(struct Scsi_Host *shost, int channel,
 857                 struct fc_vport_identifiers *);
 858 int fc_vport_terminate(struct fc_vport *vport);
 859 int fc_block_scsi_eh(struct scsi_cmnd *cmnd);
 860
 861 #endif /* SCSI_TRANSPORT_FC_H */