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) 2004-2005   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/config.h>
  31
  32 struct scsi_transport_template;
  33
  34
  35 /*
  36  * FC Port definitions - Following FC HBAAPI guidelines
  37  *
  38  * Note: Not all binary values for the different fields match HBAAPI.
  39  *  Instead, we use densely packed ordinal values or enums.
  40  *  We get away with this as we never present the actual binary values
  41  *  externally. For sysfs, we always present the string that describes
  42  *  the value. Thus, an admin doesn't need a magic HBAAPI decoder ring
  43  *  to understand the values. The HBAAPI user-space library is free to
  44  *  convert the strings into the HBAAPI-specified binary values.
  45  *
  46  * Note: Not all HBAAPI-defined values are contained in the definitions
  47  *  below. Those not appropriate to an fc_host (e.g. FCP initiator) have
  48  *  been removed.
  49  */
  50
  51 /*
  52  * fc_port_type: If you alter this, you also need to alter scsi_transport_fc.c
  53  * (for the ascii descriptions).
  54  */
  55 enum fc_port_type {
  56         FC_PORTTYPE_UNKNOWN,
  57         FC_PORTTYPE_OTHER,
  58         FC_PORTTYPE_NOTPRESENT,
  59         FC_PORTTYPE_NPORT,              /* Attached to FPort */
  60         FC_PORTTYPE_NLPORT,             /* (Public) Loop w/ FLPort */
  61         FC_PORTTYPE_LPORT,              /* (Private) Loop w/o FLPort */
  62         FC_PORTTYPE_PTP,                /* Point to Point w/ another NPort */
  63 };
  64
  65 /*
  66  * fc_port_state: If you alter this, you also need to alter scsi_transport_fc.c
  67  * (for the ascii descriptions).
  68  */
  69 enum fc_port_state {
  70         FC_PORTSTATE_UNKNOWN,
  71         FC_PORTSTATE_NOTPRESENT,
  72         FC_PORTSTATE_ONLINE,
  73         FC_PORTSTATE_OFFLINE,           /* User has taken Port Offline */
  74         FC_PORTSTATE_BLOCKED,
  75         FC_PORTSTATE_BYPASSED,
  76         FC_PORTSTATE_DIAGNOSTICS,
  77         FC_PORTSTATE_LINKDOWN,
  78         FC_PORTSTATE_ERROR,
  79         FC_PORTSTATE_LOOPBACK,
  80 };
  81
  82
  83 /*
  84  * FC Classes of Service
  85  * Note: values are not enumerated, as they can be "or'd" together
  86  * for reporting (e.g. report supported_classes). If you alter this list,
  87  * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
  88  */
  89 #define FC_COS_UNSPECIFIED              0
  90 #define FC_COS_CLASS1                   2
  91 #define FC_COS_CLASS2                   4
  92 #define FC_COS_CLASS3                   8
  93 #define FC_COS_CLASS4                   0x10
  94 #define FC_COS_CLASS6                   0x40
  95
  96 /*
  97  * FC Port Speeds
  98  * Note: values are not enumerated, as they can be "or'd" together
  99  * for reporting (e.g. report supported_speeds). If you alter this list,
 100  * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
 101  */
 102 #define FC_PORTSPEED_UNKNOWN            0 /* Unknown - transceiver
 103                                              incapable of reporting */
 104 #define FC_PORTSPEED_1GBIT              1
 105 #define FC_PORTSPEED_2GBIT              2
 106 #define FC_PORTSPEED_10GBIT             4
 107 #define FC_PORTSPEED_4GBIT              8
 108 #define FC_PORTSPEED_NOT_NEGOTIATED     (1 << 15) /* Speed not established */
 109
 110 /*
 111  * fc_tgtid_binding_type: If you alter this, you also need to alter
 112  * scsi_transport_fc.c (for the ascii descriptions).
 113  */
 114 enum fc_tgtid_binding_type  {
 115         FC_TGTID_BIND_NONE,
 116         FC_TGTID_BIND_BY_WWPN,
 117         FC_TGTID_BIND_BY_WWNN,
 118         FC_TGTID_BIND_BY_ID,
 119 };
 120
 121 /*
 122  * FC Remote Port Roles
 123  * Note: values are not enumerated, as they can be "or'd" together
 124  * for reporting (e.g. report roles). If you alter this list,
 125  * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
 126  */
 127 #define FC_RPORT_ROLE_UNKNOWN                   0x00
 128 #define FC_RPORT_ROLE_FCP_TARGET                0x01
 129 #define FC_RPORT_ROLE_FCP_INITIATOR             0x02
 130 #define FC_RPORT_ROLE_IP_PORT                   0x04
 131
 132
 133 /*
 134  * fc_rport_identifiers: This set of data contains all elements
 135  * to uniquely identify a remote FC port. The driver uses this data
 136  * to report the existence of a remote FC port in the topology. Internally,
 137  * the transport uses this data for attributes and to manage consistent
 138  * target id bindings.
 139  */
 140 struct fc_rport_identifiers {
 141         u64 node_name;
 142         u64 port_name;
 143         u32 port_id;
 144         u32 roles;
 145 };
 146
 147 /* Macro for use in defining Remote Port attributes */
 148 #define FC_RPORT_ATTR(_name,_mode,_show,_store)                         \
 149 struct class_device_attribute class_device_attr_rport_##_name =         \
 150         __ATTR(_name,_mode,_show,_store)
 151
 152
 153 /*
 154  * FC Remote Port Attributes
 155  *
 156  * This structure exists for each remote FC port that a LLDD notifies
 157  * the subsystem of.  A remote FC port may or may not be a SCSI Target,
 158  * also be a SCSI initiator, IP endpoint, etc. As such, the remote
 159  * port is considered a separate entity, independent of "role" (such
 160  * as scsi target).
 161  *
 162  * --
 163  *
 164  * Attributes are based on HBAAPI V2.0 definitions. Only those
 165  * attributes that are determinable by the local port (aka Host)
 166  * are contained.
 167  *
 168  * Fixed attributes are not expected to change. The driver is
 169  * expected to set these values after successfully calling
 170  * fc_remote_port_add(). The transport fully manages all get functions
 171  * w/o driver interaction.
 172  *
 173  * Dynamic attributes are expected to change. The driver participates
 174  * in all get/set operations via functions provided by the driver.
 175  *
 176  * Private attributes are transport-managed values. They are fully
 177  * managed by the transport w/o driver interaction.
 178  */
 179
 180 struct fc_rport {       /* aka fc_starget_attrs */
 181         /* Fixed Attributes */
 182         u32 maxframe_size;
 183         u32 supported_classes;
 184
 185         /* Dynamic Attributes */
 186         u32 dev_loss_tmo;       /* Remote Port loss timeout in seconds. */
 187
 188         /* Private (Transport-managed) Attributes */
 189         u64 node_name;
 190         u64 port_name;
 191         u32 port_id;
 192         u32 roles;
 193         enum fc_port_state port_state;  /* Will only be ONLINE or UNKNOWN */
 194         u32 scsi_target_id;
 195
 196         /* exported data */
 197         void *dd_data;                  /* Used for driver-specific storage */
 198
 199         /* internal data */
 200         unsigned int channel;
 201         u32 number;
 202         struct list_head peers;
 203         struct device dev;
 204         struct work_struct dev_loss_work;
 205         struct work_struct scan_work;
 206 } __attribute__((aligned(sizeof(unsigned long))));
 207
 208 #define dev_to_rport(d)                         \
 209         container_of(d, struct fc_rport, dev)
 210 #define transport_class_to_rport(classdev)      \
 211         dev_to_rport(classdev->dev)
 212 #define rport_to_shost(r)                       \
 213         dev_to_shost(r->dev.parent)
 214
 215 /*
 216  * FC SCSI Target Attributes
 217  *
 218  * The SCSI Target is considered an extention of a remote port (as
 219  * a remote port can be more than a SCSI Target). Within the scsi
 220  * subsystem, we leave the Target as a separate entity. Doing so
 221  * provides backward compatibility with prior FC transport api's,
 222  * and lets remote ports be handled entirely within the FC transport
 223  * and independently from the scsi subsystem. The drawback is that
 224  * some data will be duplicated.
 225  */
 226
 227 struct fc_starget_attrs {       /* aka fc_target_attrs */
 228         /* Dynamic Attributes */
 229         u64 node_name;
 230         u64 port_name;
 231         u32 port_id;
 232 };
 233
 234 #define fc_starget_node_name(x) \
 235         (((struct fc_starget_attrs *)&(x)->starget_data)->node_name)
 236 #define fc_starget_port_name(x) \
 237         (((struct fc_starget_attrs *)&(x)->starget_data)->port_name)
 238 #define fc_starget_port_id(x) \
 239         (((struct fc_starget_attrs *)&(x)->starget_data)->port_id)
 240
 241 #define starget_to_rport(s)                     \
 242         scsi_is_fc_rport(s->dev.parent) ? dev_to_rport(s->dev.parent) : NULL
 243
 244
 245 /*
 246  * FC Local Port (Host) Statistics
 247  */
 248
 249 /* FC Statistics - Following FC HBAAPI v2.0 guidelines */
 250 struct fc_host_statistics {
 251         /* port statistics */
 252         u64 seconds_since_last_reset;
 253         u64 tx_frames;
 254         u64 tx_words;
 255         u64 rx_frames;
 256         u64 rx_words;
 257         u64 lip_count;
 258         u64 nos_count;
 259         u64 error_frames;
 260         u64 dumped_frames;
 261         u64 link_failure_count;
 262         u64 loss_of_sync_count;
 263         u64 loss_of_signal_count;
 264         u64 prim_seq_protocol_err_count;
 265         u64 invalid_tx_word_count;
 266         u64 invalid_crc_count;
 267
 268         /* fc4 statistics  (only FCP supported currently) */
 269         u64 fcp_input_requests;
 270         u64 fcp_output_requests;
 271         u64 fcp_control_requests;
 272         u64 fcp_input_megabytes;
 273         u64 fcp_output_megabytes;
 274 };
 275
 276
 277 /*
 278  * FC Local Port (Host) Attributes
 279  *
 280  * Attributes are based on HBAAPI V2.0 definitions.
 281  * Note: OSDeviceName is determined by user-space library
 282  *
 283  * Fixed attributes are not expected to change. The driver is
 284  * expected to set these values after successfully calling scsi_add_host().
 285  * The transport fully manages all get functions w/o driver interaction.
 286  *
 287  * Dynamic attributes are expected to change. The driver participates
 288  * in all get/set operations via functions provided by the driver.
 289  *
 290  * Private attributes are transport-managed values. They are fully
 291  * managed by the transport w/o driver interaction.
 292  */
 293
 294 #define FC_FC4_LIST_SIZE                32
 295 #define FC_SYMBOLIC_NAME_SIZE           256
 296 #define FC_VERSION_STRING_SIZE          64
 297 #define FC_SERIAL_NUMBER_SIZE           80
 298
 299 struct fc_host_attrs {
 300         /* Fixed Attributes */
 301         u64 node_name;
 302         u64 port_name;
 303         u32 supported_classes;
 304         u8  supported_fc4s[FC_FC4_LIST_SIZE];
 305         char symbolic_name[FC_SYMBOLIC_NAME_SIZE];
 306         u32 supported_speeds;
 307         u32 maxframe_size;
 308         char serial_number[FC_SERIAL_NUMBER_SIZE];
 309
 310         /* Dynamic Attributes */
 311         u32 port_id;
 312         enum fc_port_type port_type;
 313         enum fc_port_state port_state;
 314         u8  active_fc4s[FC_FC4_LIST_SIZE];
 315         u32 speed;
 316         u64 fabric_name;
 317
 318         /* Private (Transport-managed) Attributes */
 319         enum fc_tgtid_binding_type  tgtid_bind_type;
 320
 321         /* internal data */
 322         struct list_head rports;
 323         struct list_head rport_bindings;
 324         u32 next_rport_number;
 325         u32 next_target_id;
 326 };
 327
 328 #define fc_host_node_name(x) \
 329         (((struct fc_host_attrs *)(x)->shost_data)->node_name)
 330 #define fc_host_port_name(x)    \
 331         (((struct fc_host_attrs *)(x)->shost_data)->port_name)
 332 #define fc_host_supported_classes(x)    \
 333         (((struct fc_host_attrs *)(x)->shost_data)->supported_classes)
 334 #define fc_host_supported_fc4s(x)       \
 335         (((struct fc_host_attrs *)(x)->shost_data)->supported_fc4s)
 336 #define fc_host_symbolic_name(x)        \
 337         (((struct fc_host_attrs *)(x)->shost_data)->symbolic_name)
 338 #define fc_host_supported_speeds(x)     \
 339         (((struct fc_host_attrs *)(x)->shost_data)->supported_speeds)
 340 #define fc_host_maxframe_size(x)        \
 341         (((struct fc_host_attrs *)(x)->shost_data)->maxframe_size)
 342 #define fc_host_serial_number(x)        \
 343         (((struct fc_host_attrs *)(x)->shost_data)->serial_number)
 344 #define fc_host_port_id(x)      \
 345         (((struct fc_host_attrs *)(x)->shost_data)->port_id)
 346 #define fc_host_port_type(x)    \
 347         (((struct fc_host_attrs *)(x)->shost_data)->port_type)
 348 #define fc_host_port_state(x)   \
 349         (((struct fc_host_attrs *)(x)->shost_data)->port_state)
 350 #define fc_host_active_fc4s(x)  \
 351         (((struct fc_host_attrs *)(x)->shost_data)->active_fc4s)
 352 #define fc_host_speed(x)        \
 353         (((struct fc_host_attrs *)(x)->shost_data)->speed)
 354 #define fc_host_fabric_name(x)  \
 355         (((struct fc_host_attrs *)(x)->shost_data)->fabric_name)
 356 #define fc_host_tgtid_bind_type(x) \
 357         (((struct fc_host_attrs *)(x)->shost_data)->tgtid_bind_type)
 358 #define fc_host_rports(x) \
 359         (((struct fc_host_attrs *)(x)->shost_data)->rports)
 360 #define fc_host_rport_bindings(x) \
 361         (((struct fc_host_attrs *)(x)->shost_data)->rport_bindings)
 362 #define fc_host_next_rport_number(x) \
 363         (((struct fc_host_attrs *)(x)->shost_data)->next_rport_number)
 364 #define fc_host_next_target_id(x) \
 365         (((struct fc_host_attrs *)(x)->shost_data)->next_target_id)
 366
 367
 368 /* The functions by which the transport class and the driver communicate */
 369 struct fc_function_template {
 370         void    (*get_rport_dev_loss_tmo)(struct fc_rport *);
 371         void    (*set_rport_dev_loss_tmo)(struct fc_rport *, u32);
 372
 373         void    (*get_starget_node_name)(struct scsi_target *);
 374         void    (*get_starget_port_name)(struct scsi_target *);
 375         void    (*get_starget_port_id)(struct scsi_target *);
 376
 377         void    (*get_host_port_id)(struct Scsi_Host *);
 378         void    (*get_host_port_type)(struct Scsi_Host *);
 379         void    (*get_host_port_state)(struct Scsi_Host *);
 380         void    (*get_host_active_fc4s)(struct Scsi_Host *);
 381         void    (*get_host_speed)(struct Scsi_Host *);
 382         void    (*get_host_fabric_name)(struct Scsi_Host *);
 383
 384         struct fc_host_statistics * (*get_fc_host_stats)(struct Scsi_Host *);
 385         void    (*reset_fc_host_stats)(struct Scsi_Host *);
 386
 387         /* allocation lengths for host-specific data */
 388         u32                             dd_fcrport_size;
 389
 390         /*
 391          * The driver sets these to tell the transport class it
 392          * wants the attributes displayed in sysfs.  If the show_ flag
 393          * is not set, the attribute will be private to the transport
 394          * class
 395          */
 396
 397         /* remote port fixed attributes */
 398         unsigned long   show_rport_maxframe_size:1;
 399         unsigned long   show_rport_supported_classes:1;
 400         unsigned long   show_rport_dev_loss_tmo:1;
 401
 402         /*
 403          * target dynamic attributes
 404          * These should all be "1" if the driver uses the remote port
 405          * add/delete functions (so attributes reflect rport values).
 406          */
 407         unsigned long   show_starget_node_name:1;
 408         unsigned long   show_starget_port_name:1;
 409         unsigned long   show_starget_port_id:1;
 410
 411         /* host fixed attributes */
 412         unsigned long   show_host_node_name:1;
 413         unsigned long   show_host_port_name:1;
 414         unsigned long   show_host_supported_classes:1;
 415         unsigned long   show_host_supported_fc4s:1;
 416         unsigned long   show_host_symbolic_name:1;
 417         unsigned long   show_host_supported_speeds:1;
 418         unsigned long   show_host_maxframe_size:1;
 419         unsigned long   show_host_serial_number:1;
 420         /* host dynamic attributes */
 421         unsigned long   show_host_port_id:1;
 422         unsigned long   show_host_port_type:1;
 423         unsigned long   show_host_port_state:1;
 424         unsigned long   show_host_active_fc4s:1;
 425         unsigned long   show_host_speed:1;
 426         unsigned long   show_host_fabric_name:1;
 427 };
 428
 429
 430 struct scsi_transport_template *fc_attach_transport(
 431                         struct fc_function_template *);
 432 void fc_release_transport(struct scsi_transport_template *);
 433 void fc_remove_host(struct Scsi_Host *);
 434 struct fc_rport *fc_remote_port_add(struct Scsi_Host *shost,
 435                         int channel, struct fc_rport_identifiers  *ids);
 436 void fc_remote_port_delete(struct fc_rport  *rport);
 437 void fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles);
 438 int fc_remote_port_block(struct fc_rport *rport);
 439 void fc_remote_port_unblock(struct fc_rport *rport);
 440 int scsi_is_fc_rport(const struct device *);
 441
 442 #endif /* SCSI_TRANSPORT_FC_H */