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>
32 struct scsi_transport_template;
36 * FC Port definitions - Following FC HBAAPI guidelines
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.
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
52 * fc_port_type: If you alter this, you also need to alter scsi_transport_fc.c
53 * (for the ascii descriptions).
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 */
66 * fc_port_state: If you alter this, you also need to alter scsi_transport_fc.c
67 * (for the ascii descriptions).
71 FC_PORTSTATE_NOTPRESENT,
73 FC_PORTSTATE_OFFLINE, /* User has taken Port Offline */
75 FC_PORTSTATE_BYPASSED,
76 FC_PORTSTATE_DIAGNOSTICS,
77 FC_PORTSTATE_LINKDOWN,
79 FC_PORTSTATE_LOOPBACK,
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).
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
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).
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_4GBIT 4
107 #define FC_PORTSPEED_10GBIT 8
108 #define FC_PORTSPEED_NOT_NEGOTIATED (1 << 15) /* Speed not established */
111 * fc_tgtid_binding_type: If you alter this, you also need to alter
112 * scsi_transport_fc.c (for the ascii descriptions).
114 enum fc_tgtid_binding_type {
116 FC_TGTID_BIND_BY_WWPN,
117 FC_TGTID_BIND_BY_WWNN,
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).
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
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.
140 struct fc_rport_identifiers {
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)
154 * FC Remote Port Attributes
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
164 * Attributes are based on HBAAPI V2.0 definitions. Only those
165 * attributes that are determinable by the local port (aka Host)
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.
173 * Dynamic attributes are expected to change. The driver participates
174 * in all get/set operations via functions provided by the driver.
176 * Private attributes are transport-managed values. They are fully
177 * managed by the transport w/o driver interaction.
180 struct fc_rport { /* aka fc_starget_attrs */
181 /* Fixed Attributes */
183 u32 supported_classes;
185 /* Dynamic Attributes */
186 u32 dev_loss_tmo; /* Remote Port loss timeout in seconds. */
188 /* Private (Transport-managed) Attributes */
193 enum fc_port_state port_state; /* Will only be ONLINE or UNKNOWN */
197 void *dd_data; /* Used for driver-specific storage */
200 unsigned int channel;
202 struct list_head peers;
204 struct work_struct dev_loss_work;
205 struct work_struct scan_work;
206 } __attribute__((aligned(sizeof(unsigned long))));
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)
216 * FC SCSI Target Attributes
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.
227 struct fc_starget_attrs { /* aka fc_target_attrs */
228 /* Dynamic Attributes */
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)
241 #define starget_to_rport(s) \
242 scsi_is_fc_rport(s->dev.parent) ? dev_to_rport(s->dev.parent) : NULL
246 * FC Local Port (Host) Statistics
249 /* FC Statistics - Following FC HBAAPI v2.0 guidelines */
250 struct fc_host_statistics {
251 /* port statistics */
252 u64 seconds_since_last_reset;
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;
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;
278 * FC Local Port (Host) Attributes
280 * Attributes are based on HBAAPI V2.0 definitions.
281 * Note: OSDeviceName is determined by user-space library
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.
287 * Dynamic attributes are expected to change. The driver participates
288 * in all get/set operations via functions provided by the driver.
290 * Private attributes are transport-managed values. They are fully
291 * managed by the transport w/o driver interaction.
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
299 struct fc_host_attrs {
300 /* Fixed Attributes */
303 u32 supported_classes;
304 u8 supported_fc4s[FC_FC4_LIST_SIZE];
305 char symbolic_name[FC_SYMBOLIC_NAME_SIZE];
306 u32 supported_speeds;
308 char serial_number[FC_SERIAL_NUMBER_SIZE];
310 /* Dynamic Attributes */
312 enum fc_port_type port_type;
313 enum fc_port_state port_state;
314 u8 active_fc4s[FC_FC4_LIST_SIZE];
318 /* Private (Transport-managed) Attributes */
319 enum fc_tgtid_binding_type tgtid_bind_type;
322 struct list_head rports;
323 struct list_head rport_bindings;
324 u32 next_rport_number;
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)
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);
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 *);
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 *);
384 struct fc_host_statistics * (*get_fc_host_stats)(struct Scsi_Host *);
385 void (*reset_fc_host_stats)(struct Scsi_Host *);
387 /* allocation lengths for host-specific data */
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
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;
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).
407 unsigned long show_starget_node_name:1;
408 unsigned long show_starget_port_name:1;
409 unsigned long show_starget_port_id:1;
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;
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 *);
442 static inline u64 wwn_to_u64(u8 *wwn)
444 return (u64)wwn[0] << 56 | (u64)wwn[1] << 48 |
445 (u64)wwn[2] << 40 | (u64)wwn[3] << 32 |
446 (u64)wwn[4] << 24 | (u64)wwn[5] << 16 |
447 (u64)wwn[6] << 8 | (u64)wwn[7];
450 #endif /* SCSI_TRANSPORT_FC_H */