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/sched.h>
31 #include <scsi/scsi.h>
33 struct scsi_transport_template;
37 * FC Port definitions - Following FC HBAAPI guidelines
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.
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
53 * fc_port_type: If you alter this, you also need to alter scsi_transport_fc.c
54 * (for the ascii descriptions).
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 */
67 * fc_port_state: If you alter this, you also need to alter scsi_transport_fc.c
68 * (for the ascii descriptions).
72 FC_PORTSTATE_NOTPRESENT,
74 FC_PORTSTATE_OFFLINE, /* User has taken Port Offline */
76 FC_PORTSTATE_BYPASSED,
77 FC_PORTSTATE_DIAGNOSTICS,
78 FC_PORTSTATE_LINKDOWN,
80 FC_PORTSTATE_LOOPBACK,
86 * FC Classes of Service
87 * Note: values are not enumerated, as they can be "or'd" together
88 * for reporting (e.g. report supported_classes). If you alter this list,
89 * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
91 #define FC_COS_UNSPECIFIED 0
92 #define FC_COS_CLASS1 2
93 #define FC_COS_CLASS2 4
94 #define FC_COS_CLASS3 8
95 #define FC_COS_CLASS4 0x10
96 #define FC_COS_CLASS6 0x40
100 * Note: values are not enumerated, as they can be "or'd" together
101 * for reporting (e.g. report supported_speeds). If you alter this list,
102 * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
104 #define FC_PORTSPEED_UNKNOWN 0 /* Unknown - transceiver
105 incapable of reporting */
106 #define FC_PORTSPEED_1GBIT 1
107 #define FC_PORTSPEED_2GBIT 2
108 #define FC_PORTSPEED_4GBIT 4
109 #define FC_PORTSPEED_10GBIT 8
110 #define FC_PORTSPEED_NOT_NEGOTIATED (1 << 15) /* Speed not established */
113 * fc_tgtid_binding_type: If you alter this, you also need to alter
114 * scsi_transport_fc.c (for the ascii descriptions).
116 enum fc_tgtid_binding_type {
118 FC_TGTID_BIND_BY_WWPN,
119 FC_TGTID_BIND_BY_WWNN,
124 * FC Remote Port Roles
125 * Note: values are not enumerated, as they can be "or'd" together
126 * for reporting (e.g. report roles). If you alter this list,
127 * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
129 #define FC_RPORT_ROLE_UNKNOWN 0x00
130 #define FC_RPORT_ROLE_FCP_TARGET 0x01
131 #define FC_RPORT_ROLE_FCP_INITIATOR 0x02
132 #define FC_RPORT_ROLE_IP_PORT 0x04
136 * fc_rport_identifiers: This set of data contains all elements
137 * to uniquely identify a remote FC port. The driver uses this data
138 * to report the existence of a remote FC port in the topology. Internally,
139 * the transport uses this data for attributes and to manage consistent
140 * target id bindings.
142 struct fc_rport_identifiers {
149 /* Macro for use in defining Remote Port attributes */
150 #define FC_RPORT_ATTR(_name,_mode,_show,_store) \
151 struct class_device_attribute class_device_attr_rport_##_name = \
152 __ATTR(_name,_mode,_show,_store)
156 * FC Remote Port Attributes
158 * This structure exists for each remote FC port that a LLDD notifies
159 * the subsystem of. A remote FC port may or may not be a SCSI Target,
160 * also be a SCSI initiator, IP endpoint, etc. As such, the remote
161 * port is considered a separate entity, independent of "role" (such
166 * Attributes are based on HBAAPI V2.0 definitions. Only those
167 * attributes that are determinable by the local port (aka Host)
170 * Fixed attributes are not expected to change. The driver is
171 * expected to set these values after successfully calling
172 * fc_remote_port_add(). The transport fully manages all get functions
173 * w/o driver interaction.
175 * Dynamic attributes are expected to change. The driver participates
176 * in all get/set operations via functions provided by the driver.
178 * Private attributes are transport-managed values. They are fully
179 * managed by the transport w/o driver interaction.
182 struct fc_rport { /* aka fc_starget_attrs */
183 /* Fixed Attributes */
185 u32 supported_classes;
187 /* Dynamic Attributes */
188 u32 dev_loss_tmo; /* Remote Port loss timeout in seconds. */
190 /* Private (Transport-managed) Attributes */
195 enum fc_port_state port_state; /* Will only be ONLINE or UNKNOWN */
199 void *dd_data; /* Used for driver-specific storage */
202 unsigned int channel;
205 struct list_head peers;
207 struct work_struct dev_loss_work;
208 struct work_struct scan_work;
209 struct work_struct stgt_delete_work;
210 struct work_struct rport_delete_work;
211 } __attribute__((aligned(sizeof(unsigned long))));
213 /* bit field values for struct fc_rport "flags" field: */
214 #define FC_RPORT_DEVLOSS_PENDING 0x01
215 #define FC_RPORT_SCAN_PENDING 0x02
217 #define dev_to_rport(d) \
218 container_of(d, struct fc_rport, dev)
219 #define transport_class_to_rport(classdev) \
220 dev_to_rport(classdev->dev)
221 #define rport_to_shost(r) \
222 dev_to_shost(r->dev.parent)
225 * FC SCSI Target Attributes
227 * The SCSI Target is considered an extention of a remote port (as
228 * a remote port can be more than a SCSI Target). Within the scsi
229 * subsystem, we leave the Target as a separate entity. Doing so
230 * provides backward compatibility with prior FC transport api's,
231 * and lets remote ports be handled entirely within the FC transport
232 * and independently from the scsi subsystem. The drawback is that
233 * some data will be duplicated.
236 struct fc_starget_attrs { /* aka fc_target_attrs */
237 /* Dynamic Attributes */
243 #define fc_starget_node_name(x) \
244 (((struct fc_starget_attrs *)&(x)->starget_data)->node_name)
245 #define fc_starget_port_name(x) \
246 (((struct fc_starget_attrs *)&(x)->starget_data)->port_name)
247 #define fc_starget_port_id(x) \
248 (((struct fc_starget_attrs *)&(x)->starget_data)->port_id)
250 #define starget_to_rport(s) \
251 scsi_is_fc_rport(s->dev.parent) ? dev_to_rport(s->dev.parent) : NULL
255 * FC Local Port (Host) Statistics
258 /* FC Statistics - Following FC HBAAPI v2.0 guidelines */
259 struct fc_host_statistics {
260 /* port statistics */
261 u64 seconds_since_last_reset;
270 u64 link_failure_count;
271 u64 loss_of_sync_count;
272 u64 loss_of_signal_count;
273 u64 prim_seq_protocol_err_count;
274 u64 invalid_tx_word_count;
275 u64 invalid_crc_count;
277 /* fc4 statistics (only FCP supported currently) */
278 u64 fcp_input_requests;
279 u64 fcp_output_requests;
280 u64 fcp_control_requests;
281 u64 fcp_input_megabytes;
282 u64 fcp_output_megabytes;
287 * FC Local Port (Host) Attributes
289 * Attributes are based on HBAAPI V2.0 definitions.
290 * Note: OSDeviceName is determined by user-space library
292 * Fixed attributes are not expected to change. The driver is
293 * expected to set these values after successfully calling scsi_add_host().
294 * The transport fully manages all get functions w/o driver interaction.
296 * Dynamic attributes are expected to change. The driver participates
297 * in all get/set operations via functions provided by the driver.
299 * Private attributes are transport-managed values. They are fully
300 * managed by the transport w/o driver interaction.
303 #define FC_FC4_LIST_SIZE 32
304 #define FC_SYMBOLIC_NAME_SIZE 256
305 #define FC_VERSION_STRING_SIZE 64
306 #define FC_SERIAL_NUMBER_SIZE 80
308 struct fc_host_attrs {
309 /* Fixed Attributes */
312 u64 permanent_port_name;
313 u32 supported_classes;
314 u8 supported_fc4s[FC_FC4_LIST_SIZE];
315 char symbolic_name[FC_SYMBOLIC_NAME_SIZE];
316 u32 supported_speeds;
318 char serial_number[FC_SERIAL_NUMBER_SIZE];
320 /* Dynamic Attributes */
322 enum fc_port_type port_type;
323 enum fc_port_state port_state;
324 u8 active_fc4s[FC_FC4_LIST_SIZE];
328 /* Private (Transport-managed) Attributes */
329 enum fc_tgtid_binding_type tgtid_bind_type;
332 struct list_head rports;
333 struct list_head rport_bindings;
334 u32 next_rport_number;
337 /* work queues for rport state manipulation */
338 char work_q_name[KOBJ_NAME_LEN];
339 struct workqueue_struct *work_q;
340 char devloss_work_q_name[KOBJ_NAME_LEN];
341 struct workqueue_struct *devloss_work_q;
344 #define shost_to_fc_host(x) \
345 ((struct fc_host_attrs *)(x)->shost_data)
347 #define fc_host_node_name(x) \
348 (((struct fc_host_attrs *)(x)->shost_data)->node_name)
349 #define fc_host_port_name(x) \
350 (((struct fc_host_attrs *)(x)->shost_data)->port_name)
351 #define fc_host_permanent_port_name(x) \
352 (((struct fc_host_attrs *)(x)->shost_data)->permanent_port_name)
353 #define fc_host_supported_classes(x) \
354 (((struct fc_host_attrs *)(x)->shost_data)->supported_classes)
355 #define fc_host_supported_fc4s(x) \
356 (((struct fc_host_attrs *)(x)->shost_data)->supported_fc4s)
357 #define fc_host_symbolic_name(x) \
358 (((struct fc_host_attrs *)(x)->shost_data)->symbolic_name)
359 #define fc_host_supported_speeds(x) \
360 (((struct fc_host_attrs *)(x)->shost_data)->supported_speeds)
361 #define fc_host_maxframe_size(x) \
362 (((struct fc_host_attrs *)(x)->shost_data)->maxframe_size)
363 #define fc_host_serial_number(x) \
364 (((struct fc_host_attrs *)(x)->shost_data)->serial_number)
365 #define fc_host_port_id(x) \
366 (((struct fc_host_attrs *)(x)->shost_data)->port_id)
367 #define fc_host_port_type(x) \
368 (((struct fc_host_attrs *)(x)->shost_data)->port_type)
369 #define fc_host_port_state(x) \
370 (((struct fc_host_attrs *)(x)->shost_data)->port_state)
371 #define fc_host_active_fc4s(x) \
372 (((struct fc_host_attrs *)(x)->shost_data)->active_fc4s)
373 #define fc_host_speed(x) \
374 (((struct fc_host_attrs *)(x)->shost_data)->speed)
375 #define fc_host_fabric_name(x) \
376 (((struct fc_host_attrs *)(x)->shost_data)->fabric_name)
377 #define fc_host_tgtid_bind_type(x) \
378 (((struct fc_host_attrs *)(x)->shost_data)->tgtid_bind_type)
379 #define fc_host_rports(x) \
380 (((struct fc_host_attrs *)(x)->shost_data)->rports)
381 #define fc_host_rport_bindings(x) \
382 (((struct fc_host_attrs *)(x)->shost_data)->rport_bindings)
383 #define fc_host_next_rport_number(x) \
384 (((struct fc_host_attrs *)(x)->shost_data)->next_rport_number)
385 #define fc_host_next_target_id(x) \
386 (((struct fc_host_attrs *)(x)->shost_data)->next_target_id)
387 #define fc_host_work_q_name(x) \
388 (((struct fc_host_attrs *)(x)->shost_data)->work_q_name)
389 #define fc_host_work_q(x) \
390 (((struct fc_host_attrs *)(x)->shost_data)->work_q)
391 #define fc_host_devloss_work_q_name(x) \
392 (((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q_name)
393 #define fc_host_devloss_work_q(x) \
394 (((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q)
397 /* The functions by which the transport class and the driver communicate */
398 struct fc_function_template {
399 void (*get_rport_dev_loss_tmo)(struct fc_rport *);
400 void (*set_rport_dev_loss_tmo)(struct fc_rport *, u32);
402 void (*get_starget_node_name)(struct scsi_target *);
403 void (*get_starget_port_name)(struct scsi_target *);
404 void (*get_starget_port_id)(struct scsi_target *);
406 void (*get_host_port_id)(struct Scsi_Host *);
407 void (*get_host_port_type)(struct Scsi_Host *);
408 void (*get_host_port_state)(struct Scsi_Host *);
409 void (*get_host_active_fc4s)(struct Scsi_Host *);
410 void (*get_host_speed)(struct Scsi_Host *);
411 void (*get_host_fabric_name)(struct Scsi_Host *);
413 struct fc_host_statistics * (*get_fc_host_stats)(struct Scsi_Host *);
414 void (*reset_fc_host_stats)(struct Scsi_Host *);
416 int (*issue_fc_host_lip)(struct Scsi_Host *);
418 /* allocation lengths for host-specific data */
422 * The driver sets these to tell the transport class it
423 * wants the attributes displayed in sysfs. If the show_ flag
424 * is not set, the attribute will be private to the transport
428 /* remote port fixed attributes */
429 unsigned long show_rport_maxframe_size:1;
430 unsigned long show_rport_supported_classes:1;
431 unsigned long show_rport_dev_loss_tmo:1;
434 * target dynamic attributes
435 * These should all be "1" if the driver uses the remote port
436 * add/delete functions (so attributes reflect rport values).
438 unsigned long show_starget_node_name:1;
439 unsigned long show_starget_port_name:1;
440 unsigned long show_starget_port_id:1;
442 /* host fixed attributes */
443 unsigned long show_host_node_name:1;
444 unsigned long show_host_port_name:1;
445 unsigned long show_host_permanent_port_name:1;
446 unsigned long show_host_supported_classes:1;
447 unsigned long show_host_supported_fc4s:1;
448 unsigned long show_host_symbolic_name:1;
449 unsigned long show_host_supported_speeds:1;
450 unsigned long show_host_maxframe_size:1;
451 unsigned long show_host_serial_number:1;
452 /* host dynamic attributes */
453 unsigned long show_host_port_id:1;
454 unsigned long show_host_port_type:1;
455 unsigned long show_host_port_state:1;
456 unsigned long show_host_active_fc4s:1;
457 unsigned long show_host_speed:1;
458 unsigned long show_host_fabric_name:1;
463 * fc_remote_port_chkready - called to validate the remote port state
464 * prior to initiating io to the port.
466 * Returns a scsi result code that can be returned by the LLDD.
468 * @rport: remote port to be checked
471 fc_remote_port_chkready(struct fc_rport *rport)
475 switch (rport->port_state) {
476 case FC_PORTSTATE_ONLINE:
477 if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
479 else if (rport->flags & FC_RPORT_DEVLOSS_PENDING)
480 result = DID_IMM_RETRY << 16;
482 result = DID_NO_CONNECT << 16;
484 case FC_PORTSTATE_BLOCKED:
485 result = DID_IMM_RETRY << 16;
488 result = DID_NO_CONNECT << 16;
495 struct scsi_transport_template *fc_attach_transport(
496 struct fc_function_template *);
497 void fc_release_transport(struct scsi_transport_template *);
498 void fc_remove_host(struct Scsi_Host *);
499 struct fc_rport *fc_remote_port_add(struct Scsi_Host *shost,
500 int channel, struct fc_rport_identifiers *ids);
501 void fc_remote_port_delete(struct fc_rport *rport);
502 void fc_remote_port_rolechg(struct fc_rport *rport, u32 roles);
503 int scsi_is_fc_rport(const struct device *);
505 static inline u64 wwn_to_u64(u8 *wwn)
507 return (u64)wwn[0] << 56 | (u64)wwn[1] << 48 |
508 (u64)wwn[2] << 40 | (u64)wwn[3] << 32 |
509 (u64)wwn[4] << 24 | (u64)wwn[5] << 16 |
510 (u64)wwn[6] << 8 | (u64)wwn[7];
513 #endif /* SCSI_TRANSPORT_FC_H */