2 * FiberChannel transport specific attributes exported to sysfs.
4 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
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.
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.
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
22 * Copyright (C) 2004-2005 James Smart, Emulex Corporation
23 * Rewrite for host, target, device, and remote port attributes,
24 * statistics, and service functions...
27 #ifndef SCSI_TRANSPORT_FC_H
28 #define SCSI_TRANSPORT_FC_H
30 #include <linux/config.h>
31 #include <linux/sched.h>
32 #include <scsi/scsi.h>
34 struct scsi_transport_template;
38 * FC Port definitions - Following FC HBAAPI guidelines
40 * Note: Not all binary values for the different fields match HBAAPI.
41 * Instead, we use densely packed ordinal values or enums.
42 * We get away with this as we never present the actual binary values
43 * externally. For sysfs, we always present the string that describes
44 * the value. Thus, an admin doesn't need a magic HBAAPI decoder ring
45 * to understand the values. The HBAAPI user-space library is free to
46 * convert the strings into the HBAAPI-specified binary values.
48 * Note: Not all HBAAPI-defined values are contained in the definitions
49 * below. Those not appropriate to an fc_host (e.g. FCP initiator) have
54 * fc_port_type: If you alter this, you also need to alter scsi_transport_fc.c
55 * (for the ascii descriptions).
60 FC_PORTTYPE_NOTPRESENT,
61 FC_PORTTYPE_NPORT, /* Attached to FPort */
62 FC_PORTTYPE_NLPORT, /* (Public) Loop w/ FLPort */
63 FC_PORTTYPE_LPORT, /* (Private) Loop w/o FLPort */
64 FC_PORTTYPE_PTP, /* Point to Point w/ another NPort */
68 * fc_port_state: If you alter this, you also need to alter scsi_transport_fc.c
69 * (for the ascii descriptions).
73 FC_PORTSTATE_NOTPRESENT,
75 FC_PORTSTATE_OFFLINE, /* User has taken Port Offline */
77 FC_PORTSTATE_BYPASSED,
78 FC_PORTSTATE_DIAGNOSTICS,
79 FC_PORTSTATE_LINKDOWN,
81 FC_PORTSTATE_LOOPBACK,
87 * FC Classes of Service
88 * Note: values are not enumerated, as they can be "or'd" together
89 * for reporting (e.g. report supported_classes). If you alter this list,
90 * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
92 #define FC_COS_UNSPECIFIED 0
93 #define FC_COS_CLASS1 2
94 #define FC_COS_CLASS2 4
95 #define FC_COS_CLASS3 8
96 #define FC_COS_CLASS4 0x10
97 #define FC_COS_CLASS6 0x40
101 * Note: values are not enumerated, as they can be "or'd" together
102 * for reporting (e.g. report supported_speeds). If you alter this list,
103 * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
105 #define FC_PORTSPEED_UNKNOWN 0 /* Unknown - transceiver
106 incapable of reporting */
107 #define FC_PORTSPEED_1GBIT 1
108 #define FC_PORTSPEED_2GBIT 2
109 #define FC_PORTSPEED_4GBIT 4
110 #define FC_PORTSPEED_10GBIT 8
111 #define FC_PORTSPEED_NOT_NEGOTIATED (1 << 15) /* Speed not established */
114 * fc_tgtid_binding_type: If you alter this, you also need to alter
115 * scsi_transport_fc.c (for the ascii descriptions).
117 enum fc_tgtid_binding_type {
119 FC_TGTID_BIND_BY_WWPN,
120 FC_TGTID_BIND_BY_WWNN,
125 * FC Remote Port Roles
126 * Note: values are not enumerated, as they can be "or'd" together
127 * for reporting (e.g. report roles). If you alter this list,
128 * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
130 #define FC_RPORT_ROLE_UNKNOWN 0x00
131 #define FC_RPORT_ROLE_FCP_TARGET 0x01
132 #define FC_RPORT_ROLE_FCP_INITIATOR 0x02
133 #define FC_RPORT_ROLE_IP_PORT 0x04
137 * fc_rport_identifiers: This set of data contains all elements
138 * to uniquely identify a remote FC port. The driver uses this data
139 * to report the existence of a remote FC port in the topology. Internally,
140 * the transport uses this data for attributes and to manage consistent
141 * target id bindings.
143 struct fc_rport_identifiers {
150 /* Macro for use in defining Remote Port attributes */
151 #define FC_RPORT_ATTR(_name,_mode,_show,_store) \
152 struct class_device_attribute class_device_attr_rport_##_name = \
153 __ATTR(_name,_mode,_show,_store)
157 * FC Remote Port Attributes
159 * This structure exists for each remote FC port that a LLDD notifies
160 * the subsystem of. A remote FC port may or may not be a SCSI Target,
161 * also be a SCSI initiator, IP endpoint, etc. As such, the remote
162 * port is considered a separate entity, independent of "role" (such
167 * Attributes are based on HBAAPI V2.0 definitions. Only those
168 * attributes that are determinable by the local port (aka Host)
171 * Fixed attributes are not expected to change. The driver is
172 * expected to set these values after successfully calling
173 * fc_remote_port_add(). The transport fully manages all get functions
174 * w/o driver interaction.
176 * Dynamic attributes are expected to change. The driver participates
177 * in all get/set operations via functions provided by the driver.
179 * Private attributes are transport-managed values. They are fully
180 * managed by the transport w/o driver interaction.
183 struct fc_rport { /* aka fc_starget_attrs */
184 /* Fixed Attributes */
186 u32 supported_classes;
188 /* Dynamic Attributes */
189 u32 dev_loss_tmo; /* Remote Port loss timeout in seconds. */
191 /* Private (Transport-managed) Attributes */
196 enum fc_port_state port_state; /* Will only be ONLINE or UNKNOWN */
200 void *dd_data; /* Used for driver-specific storage */
203 unsigned int channel;
205 struct list_head peers;
207 struct work_struct dev_loss_work;
208 struct work_struct scan_work;
209 } __attribute__((aligned(sizeof(unsigned long))));
211 #define dev_to_rport(d) \
212 container_of(d, struct fc_rport, dev)
213 #define transport_class_to_rport(classdev) \
214 dev_to_rport(classdev->dev)
215 #define rport_to_shost(r) \
216 dev_to_shost(r->dev.parent)
219 * FC SCSI Target Attributes
221 * The SCSI Target is considered an extention of a remote port (as
222 * a remote port can be more than a SCSI Target). Within the scsi
223 * subsystem, we leave the Target as a separate entity. Doing so
224 * provides backward compatibility with prior FC transport api's,
225 * and lets remote ports be handled entirely within the FC transport
226 * and independently from the scsi subsystem. The drawback is that
227 * some data will be duplicated.
230 struct fc_starget_attrs { /* aka fc_target_attrs */
231 /* Dynamic Attributes */
237 #define fc_starget_node_name(x) \
238 (((struct fc_starget_attrs *)&(x)->starget_data)->node_name)
239 #define fc_starget_port_name(x) \
240 (((struct fc_starget_attrs *)&(x)->starget_data)->port_name)
241 #define fc_starget_port_id(x) \
242 (((struct fc_starget_attrs *)&(x)->starget_data)->port_id)
244 #define starget_to_rport(s) \
245 scsi_is_fc_rport(s->dev.parent) ? dev_to_rport(s->dev.parent) : NULL
249 * FC Local Port (Host) Statistics
252 /* FC Statistics - Following FC HBAAPI v2.0 guidelines */
253 struct fc_host_statistics {
254 /* port statistics */
255 u64 seconds_since_last_reset;
264 u64 link_failure_count;
265 u64 loss_of_sync_count;
266 u64 loss_of_signal_count;
267 u64 prim_seq_protocol_err_count;
268 u64 invalid_tx_word_count;
269 u64 invalid_crc_count;
271 /* fc4 statistics (only FCP supported currently) */
272 u64 fcp_input_requests;
273 u64 fcp_output_requests;
274 u64 fcp_control_requests;
275 u64 fcp_input_megabytes;
276 u64 fcp_output_megabytes;
281 * FC Local Port (Host) Attributes
283 * Attributes are based on HBAAPI V2.0 definitions.
284 * Note: OSDeviceName is determined by user-space library
286 * Fixed attributes are not expected to change. The driver is
287 * expected to set these values after successfully calling scsi_add_host().
288 * The transport fully manages all get functions w/o driver interaction.
290 * Dynamic attributes are expected to change. The driver participates
291 * in all get/set operations via functions provided by the driver.
293 * Private attributes are transport-managed values. They are fully
294 * managed by the transport w/o driver interaction.
297 #define FC_FC4_LIST_SIZE 32
298 #define FC_SYMBOLIC_NAME_SIZE 256
299 #define FC_VERSION_STRING_SIZE 64
300 #define FC_SERIAL_NUMBER_SIZE 80
302 struct fc_host_attrs {
303 /* Fixed Attributes */
306 u32 supported_classes;
307 u8 supported_fc4s[FC_FC4_LIST_SIZE];
308 char symbolic_name[FC_SYMBOLIC_NAME_SIZE];
309 u32 supported_speeds;
311 char serial_number[FC_SERIAL_NUMBER_SIZE];
313 /* Dynamic Attributes */
315 enum fc_port_type port_type;
316 enum fc_port_state port_state;
317 u8 active_fc4s[FC_FC4_LIST_SIZE];
321 /* Private (Transport-managed) Attributes */
322 enum fc_tgtid_binding_type tgtid_bind_type;
325 struct list_head rports;
326 struct list_head rport_bindings;
327 u32 next_rport_number;
330 struct work_struct rport_del_work;
333 /* values for struct fc_host_attrs "flags" field: */
334 #define FC_SHOST_RPORT_DEL_SCHEDULED 0x01
337 #define fc_host_node_name(x) \
338 (((struct fc_host_attrs *)(x)->shost_data)->node_name)
339 #define fc_host_port_name(x) \
340 (((struct fc_host_attrs *)(x)->shost_data)->port_name)
341 #define fc_host_supported_classes(x) \
342 (((struct fc_host_attrs *)(x)->shost_data)->supported_classes)
343 #define fc_host_supported_fc4s(x) \
344 (((struct fc_host_attrs *)(x)->shost_data)->supported_fc4s)
345 #define fc_host_symbolic_name(x) \
346 (((struct fc_host_attrs *)(x)->shost_data)->symbolic_name)
347 #define fc_host_supported_speeds(x) \
348 (((struct fc_host_attrs *)(x)->shost_data)->supported_speeds)
349 #define fc_host_maxframe_size(x) \
350 (((struct fc_host_attrs *)(x)->shost_data)->maxframe_size)
351 #define fc_host_serial_number(x) \
352 (((struct fc_host_attrs *)(x)->shost_data)->serial_number)
353 #define fc_host_port_id(x) \
354 (((struct fc_host_attrs *)(x)->shost_data)->port_id)
355 #define fc_host_port_type(x) \
356 (((struct fc_host_attrs *)(x)->shost_data)->port_type)
357 #define fc_host_port_state(x) \
358 (((struct fc_host_attrs *)(x)->shost_data)->port_state)
359 #define fc_host_active_fc4s(x) \
360 (((struct fc_host_attrs *)(x)->shost_data)->active_fc4s)
361 #define fc_host_speed(x) \
362 (((struct fc_host_attrs *)(x)->shost_data)->speed)
363 #define fc_host_fabric_name(x) \
364 (((struct fc_host_attrs *)(x)->shost_data)->fabric_name)
365 #define fc_host_tgtid_bind_type(x) \
366 (((struct fc_host_attrs *)(x)->shost_data)->tgtid_bind_type)
367 #define fc_host_rports(x) \
368 (((struct fc_host_attrs *)(x)->shost_data)->rports)
369 #define fc_host_rport_bindings(x) \
370 (((struct fc_host_attrs *)(x)->shost_data)->rport_bindings)
371 #define fc_host_next_rport_number(x) \
372 (((struct fc_host_attrs *)(x)->shost_data)->next_rport_number)
373 #define fc_host_next_target_id(x) \
374 (((struct fc_host_attrs *)(x)->shost_data)->next_target_id)
375 #define fc_host_flags(x) \
376 (((struct fc_host_attrs *)(x)->shost_data)->flags)
377 #define fc_host_rport_del_work(x) \
378 (((struct fc_host_attrs *)(x)->shost_data)->rport_del_work)
381 /* The functions by which the transport class and the driver communicate */
382 struct fc_function_template {
383 void (*get_rport_dev_loss_tmo)(struct fc_rport *);
384 void (*set_rport_dev_loss_tmo)(struct fc_rport *, u32);
386 void (*get_starget_node_name)(struct scsi_target *);
387 void (*get_starget_port_name)(struct scsi_target *);
388 void (*get_starget_port_id)(struct scsi_target *);
390 void (*get_host_port_id)(struct Scsi_Host *);
391 void (*get_host_port_type)(struct Scsi_Host *);
392 void (*get_host_port_state)(struct Scsi_Host *);
393 void (*get_host_active_fc4s)(struct Scsi_Host *);
394 void (*get_host_speed)(struct Scsi_Host *);
395 void (*get_host_fabric_name)(struct Scsi_Host *);
397 struct fc_host_statistics * (*get_fc_host_stats)(struct Scsi_Host *);
398 void (*reset_fc_host_stats)(struct Scsi_Host *);
400 int (*issue_fc_host_lip)(struct Scsi_Host *);
402 /* allocation lengths for host-specific data */
406 * The driver sets these to tell the transport class it
407 * wants the attributes displayed in sysfs. If the show_ flag
408 * is not set, the attribute will be private to the transport
412 /* remote port fixed attributes */
413 unsigned long show_rport_maxframe_size:1;
414 unsigned long show_rport_supported_classes:1;
415 unsigned long show_rport_dev_loss_tmo:1;
418 * target dynamic attributes
419 * These should all be "1" if the driver uses the remote port
420 * add/delete functions (so attributes reflect rport values).
422 unsigned long show_starget_node_name:1;
423 unsigned long show_starget_port_name:1;
424 unsigned long show_starget_port_id:1;
426 /* host fixed attributes */
427 unsigned long show_host_node_name:1;
428 unsigned long show_host_port_name:1;
429 unsigned long show_host_supported_classes:1;
430 unsigned long show_host_supported_fc4s:1;
431 unsigned long show_host_symbolic_name:1;
432 unsigned long show_host_supported_speeds:1;
433 unsigned long show_host_maxframe_size:1;
434 unsigned long show_host_serial_number:1;
435 /* host dynamic attributes */
436 unsigned long show_host_port_id:1;
437 unsigned long show_host_port_type:1;
438 unsigned long show_host_port_state:1;
439 unsigned long show_host_active_fc4s:1;
440 unsigned long show_host_speed:1;
441 unsigned long show_host_fabric_name:1;
446 * fc_remote_port_chkready - called to validate the remote port state
447 * prior to initiating io to the port.
449 * Returns a scsi result code that can be returned by the LLDD.
451 * @rport: remote port to be checked
454 fc_remote_port_chkready(struct fc_rport *rport)
458 switch (rport->port_state) {
459 case FC_PORTSTATE_ONLINE:
462 case FC_PORTSTATE_BLOCKED:
463 result = DID_BUS_BUSY << 16;
466 result = DID_NO_CONNECT << 16;
473 struct scsi_transport_template *fc_attach_transport(
474 struct fc_function_template *);
475 void fc_release_transport(struct scsi_transport_template *);
476 void fc_remove_host(struct Scsi_Host *);
477 struct fc_rport *fc_remote_port_add(struct Scsi_Host *shost,
478 int channel, struct fc_rport_identifiers *ids);
479 void fc_remote_port_delete(struct fc_rport *rport);
480 void fc_remote_port_rolechg(struct fc_rport *rport, u32 roles);
481 int scsi_is_fc_rport(const struct device *);
483 static inline u64 wwn_to_u64(u8 *wwn)
485 return (u64)wwn[0] << 56 | (u64)wwn[1] << 48 |
486 (u64)wwn[2] << 40 | (u64)wwn[3] << 32 |
487 (u64)wwn[4] << 24 | (u64)wwn[5] << 16 |
488 (u64)wwn[6] << 8 | (u64)wwn[7];
491 #endif /* SCSI_TRANSPORT_FC_H */