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_4GBIT 4
130 #define FC_PORTSPEED_10GBIT 8
131 #define FC_PORTSPEED_8GBIT 0x10
132 #define FC_PORTSPEED_16GBIT 0x20
133 #define FC_PORTSPEED_NOT_NEGOTIATED (1 << 15) /* Speed not established */
134
135 /*
136 * fc_tgtid_binding_type: If you alter this, you also need to alter
137 * scsi_transport_fc.c (for the ascii descriptions).
138 */
139 enum fc_tgtid_binding_type {
140 FC_TGTID_BIND_NONE,
141 FC_TGTID_BIND_BY_WWPN,
142 FC_TGTID_BIND_BY_WWNN,
143 FC_TGTID_BIND_BY_ID,
144 };
145
146 /*
147 * FC Port Roles
148 * Note: values are not enumerated, as they can be "or'd" together
149 * for reporting (e.g. report roles). If you alter this list,
150 * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
151 */
152 #define FC_PORT_ROLE_UNKNOWN 0x00
153 #define FC_PORT_ROLE_FCP_TARGET 0x01
154 #define FC_PORT_ROLE_FCP_INITIATOR 0x02
155 #define FC_PORT_ROLE_IP_PORT 0x04
156
157 /* The following are for compatibility */
158 #define FC_RPORT_ROLE_UNKNOWN FC_PORT_ROLE_UNKNOWN
159 #define FC_RPORT_ROLE_FCP_TARGET FC_PORT_ROLE_FCP_TARGET
160 #define FC_RPORT_ROLE_FCP_INITIATOR FC_PORT_ROLE_FCP_INITIATOR
161 #define FC_RPORT_ROLE_IP_PORT FC_PORT_ROLE_IP_PORT
162
163
164 /* Macro for use in defining Virtual Port attributes */
165 #define FC_VPORT_ATTR(_name,_mode,_show,_store) \
166 struct device_attribute dev_attr_vport_##_name = \
167 __ATTR(_name,_mode,_show,_store)
168
169 /*
170 * fc_vport_identifiers: This set of data contains all elements
171 * to uniquely identify and instantiate a FC virtual port.
172 *
173 * Notes:
174 * symbolic_name: The driver is to append the symbolic_name string data
175 * to the symbolic_node_name data that it generates by default.
176 * the resulting combination should then be registered with the switch.
177 * It is expected that things like Xen may stuff a VM title into
178 * this field.
179 */
180 #define FC_VPORT_SYMBOLIC_NAMELEN 64
181 struct fc_vport_identifiers {
182 u64 node_name;
183 u64 port_name;
184 u32 roles;
185 bool disable;
186 enum fc_port_type vport_type; /* only FC_PORTTYPE_NPIV allowed */
187 char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN];
188 };
189
190 /*
191 * FC Virtual Port Attributes
192 *
193 * This structure exists for each FC port is a virtual FC port. Virtual
194 * ports share the physical link with the Physical port. Each virtual
195 * ports has a unique presence on the SAN, and may be instantiated via
196 * NPIV, Virtual Fabrics, or via additional ALPAs. As the vport is a
197 * unique presence, each vport has it's own view of the fabric,
198 * authentication privilege, and priorities.
199 *
200 * A virtual port may support 1 or more FC4 roles. Typically it is a
201 * FCP Initiator. It could be a FCP Target, or exist sole for an IP over FC
202 * roles. FC port attributes for the vport will be reported on any
203 * fc_host class object allocated for an FCP Initiator.
204 *
205 * --
206 *
207 * Fixed attributes are not expected to change. The driver is
208 * expected to set these values after receiving the fc_vport structure
209 * via the vport_create() call from the transport.
210 * The transport fully manages all get functions w/o driver interaction.
211 *
212 * Dynamic attributes are expected to change. The driver participates
213 * in all get/set operations via functions provided by the driver.
214 *
215 * Private attributes are transport-managed values. They are fully
216 * managed by the transport w/o driver interaction.
217 */
218
219 struct fc_vport {
220 /* Fixed Attributes */
221
222 /* Dynamic Attributes */
223
224 /* Private (Transport-managed) Attributes */
225 enum fc_vport_state vport_state;
226 enum fc_vport_state vport_last_state;
227 u64 node_name;
228 u64 port_name;
229 u32 roles;
230 u32 vport_id; /* Admin Identifier for the vport */
231 enum fc_port_type vport_type;
232 char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN];
233
234 /* exported data */
235 void *dd_data; /* Used for driver-specific storage */
236
237 /* internal data */
238 struct Scsi_Host *shost; /* Physical Port Parent */
239 unsigned int channel;
240 u32 number;
241 u8 flags;
242 struct list_head peers;
243 struct device dev;
244 struct work_struct vport_delete_work;
245 } __attribute__((aligned(sizeof(unsigned long))));
246
247 /* bit field values for struct fc_vport "flags" field: */
248 #define FC_VPORT_CREATING 0x01
249 #define FC_VPORT_DELETING 0x02
250 #define FC_VPORT_DELETED 0x04
251 #define FC_VPORT_DEL 0x06 /* Any DELETE state */
252
253 #define dev_to_vport(d) \
254 container_of(d, struct fc_vport, dev)
255 #define transport_class_to_vport(dev) \
256 dev_to_vport(dev->parent)
257 #define vport_to_shost(v) \
258 (v->shost)
259 #define vport_to_shost_channel(v) \
260 (v->channel)
261 #define vport_to_parent(v) \
262 (v->dev.parent)
263
264
265 /* Error return codes for vport_create() callback */
266 #define VPCERR_UNSUPPORTED -ENOSYS /* no driver/adapter
267 support */
268 #define VPCERR_BAD_WWN -ENOTUNIQ /* driver validation
269 of WWNs failed */
270 #define VPCERR_NO_FABRIC_SUPP -EOPNOTSUPP /* Fabric connection
271 is loop or the
272 Fabric Port does
273 not support NPIV */
274
275 /*
276 * fc_rport_identifiers: This set of data contains all elements
277 * to uniquely identify a remote FC port. The driver uses this data
278 * to report the existence of a remote FC port in the topology. Internally,
279 * the transport uses this data for attributes and to manage consistent
280 * target id bindings.
281 */
282 struct fc_rport_identifiers {
283 u64 node_name;
284 u64 port_name;
285 u32 port_id;
286 u32 roles;
287 };
288
289
290 /* Macro for use in defining Remote Port attributes */
291 #define FC_RPORT_ATTR(_name,_mode,_show,_store) \
292 struct device_attribute dev_attr_rport_##_name = \
293 __ATTR(_name,_mode,_show,_store)
294
295
296 /*
297 * FC Remote Port Attributes
298 *
299 * This structure exists for each remote FC port that a LLDD notifies
300 * the subsystem of. A remote FC port may or may not be a SCSI Target,
301 * also be a SCSI initiator, IP endpoint, etc. As such, the remote
302 * port is considered a separate entity, independent of "role" (such
303 * as scsi target).
304 *
305 * --
306 *
307 * Attributes are based on HBAAPI V2.0 definitions. Only those
308 * attributes that are determinable by the local port (aka Host)
309 * are contained.
310 *
311 * Fixed attributes are not expected to change. The driver is
312 * expected to set these values after successfully calling
313 * fc_remote_port_add(). The transport fully manages all get functions
314 * w/o driver interaction.
315 *
316 * Dynamic attributes are expected to change. The driver participates
317 * in all get/set operations via functions provided by the driver.
318 *
319 * Private attributes are transport-managed values. They are fully
320 * managed by the transport w/o driver interaction.
321 */
322
323 struct fc_rport { /* aka fc_starget_attrs */
324 /* Fixed Attributes */
325 u32 maxframe_size;
326 u32 supported_classes;
327
328 /* Dynamic Attributes */
329 u32 dev_loss_tmo; /* Remote Port loss timeout in seconds. */
330
331 /* Private (Transport-managed) Attributes */
332 u64 node_name;
333 u64 port_name;
334 u32 port_id;
335 u32 roles;
336 enum fc_port_state port_state; /* Will only be ONLINE or UNKNOWN */
337 u32 scsi_target_id;
338 u32 fast_io_fail_tmo;
339
340 /* exported data */
341 void *dd_data; /* Used for driver-specific storage */
342
343 /* internal data */
344 unsigned int channel;
345 u32 number;
346 u8 flags;
347 struct list_head peers;
348 struct device dev;
349 struct delayed_work dev_loss_work;
350 struct work_struct scan_work;
351 struct delayed_work fail_io_work;
352 struct work_struct stgt_delete_work;
353 struct work_struct rport_delete_work;
354 struct request_queue *rqst_q; /* bsg support */
355 } __attribute__((aligned(sizeof(unsigned long))));
356
357 /* bit field values for struct fc_rport "flags" field: */
358 #define FC_RPORT_DEVLOSS_PENDING 0x01
359 #define FC_RPORT_SCAN_PENDING 0x02
360 #define FC_RPORT_FAST_FAIL_TIMEDOUT 0x04
361 #define FC_RPORT_DEVLOSS_CALLBK_DONE 0x08
362
363 #define dev_to_rport(d) \
364 container_of(d, struct fc_rport, dev)
365 #define transport_class_to_rport(dev) \
366 dev_to_rport(dev->parent)
367 #define rport_to_shost(r) \
368 dev_to_shost(r->dev.parent)
369
370 /*
371 * FC SCSI Target Attributes
372 *
373 * The SCSI Target is considered an extension of a remote port (as
374 * a remote port can be more than a SCSI Target). Within the scsi
375 * subsystem, we leave the Target as a separate entity. Doing so
376 * provides backward compatibility with prior FC transport api's,
377 * and lets remote ports be handled entirely within the FC transport
378 * and independently from the scsi subsystem. The drawback is that
379 * some data will be duplicated.
380 */
381
382 struct fc_starget_attrs { /* aka fc_target_attrs */
383 /* Dynamic Attributes */
384 u64 node_name;
385 u64 port_name;
386 u32 port_id;
387 };
388
389 #define fc_starget_node_name(x) \
390 (((struct fc_starget_attrs *)&(x)->starget_data)->node_name)
391 #define fc_starget_port_name(x) \
392 (((struct fc_starget_attrs *)&(x)->starget_data)->port_name)
393 #define fc_starget_port_id(x) \
394 (((struct fc_starget_attrs *)&(x)->starget_data)->port_id)
395
396 #define starget_to_rport(s) \
397 scsi_is_fc_rport(s->dev.parent) ? dev_to_rport(s->dev.parent) : NULL
398
399
400 /*
401 * FC Local Port (Host) Statistics
402 */
403
404 /* FC Statistics - Following FC HBAAPI v2.0 guidelines */
405 struct fc_host_statistics {
406 /* port statistics */
407 u64 seconds_since_last_reset;
408 u64 tx_frames;
409 u64 tx_words;
410 u64 rx_frames;
411 u64 rx_words;
412 u64 lip_count;
413 u64 nos_count;
414 u64 error_frames;
415 u64 dumped_frames;
416 u64 link_failure_count;
417 u64 loss_of_sync_count;
418 u64 loss_of_signal_count;
419 u64 prim_seq_protocol_err_count;
420 u64 invalid_tx_word_count;
421 u64 invalid_crc_count;
422
423 /* fc4 statistics (only FCP supported currently) */
424 u64 fcp_input_requests;
425 u64 fcp_output_requests;
426 u64 fcp_control_requests;
427 u64 fcp_input_megabytes;
428 u64 fcp_output_megabytes;
429 };
430
431
432 /*
433 * FC Event Codes - Polled and Async, following FC HBAAPI v2.0 guidelines
434 */
435
436 /*
437 * fc_host_event_code: If you alter this, you also need to alter
438 * scsi_transport_fc.c (for the ascii descriptions).
439 */
440 enum fc_host_event_code {
441 FCH_EVT_LIP = 0x1,
442 FCH_EVT_LINKUP = 0x2,
443 FCH_EVT_LINKDOWN = 0x3,
444 FCH_EVT_LIPRESET = 0x4,
445 FCH_EVT_RSCN = 0x5,
446 FCH_EVT_ADAPTER_CHANGE = 0x103,
447 FCH_EVT_PORT_UNKNOWN = 0x200,
448 FCH_EVT_PORT_OFFLINE = 0x201,
449 FCH_EVT_PORT_ONLINE = 0x202,
450 FCH_EVT_PORT_FABRIC = 0x204,
451 FCH_EVT_LINK_UNKNOWN = 0x500,
452 FCH_EVT_VENDOR_UNIQUE = 0xffff,
453 };
454
455
456 /*
457 * FC Local Port (Host) Attributes
458 *
459 * Attributes are based on HBAAPI V2.0 definitions.
460 * Note: OSDeviceName is determined by user-space library
461 *
462 * Fixed attributes are not expected to change. The driver is
463 * expected to set these values after successfully calling scsi_add_host().
464 * The transport fully manages all get functions w/o driver interaction.
465 *
466 * Dynamic attributes are expected to change. The driver participates
467 * in all get/set operations via functions provided by the driver.
468 *
469 * Private attributes are transport-managed values. They are fully
470 * managed by the transport w/o driver interaction.
471 */
472
473 #define FC_FC4_LIST_SIZE 32
474 #define FC_SYMBOLIC_NAME_SIZE 256
475 #define FC_VERSION_STRING_SIZE 64
476 #define FC_SERIAL_NUMBER_SIZE 80
477
478 struct fc_host_attrs {
479 /* Fixed Attributes */
480 u64 node_name;
481 u64 port_name;
482 u64 permanent_port_name;
483 u32 supported_classes;
484 u8 supported_fc4s[FC_FC4_LIST_SIZE];
485 u32 supported_speeds;
486 u32 maxframe_size;
487 u16 max_npiv_vports;
488 char serial_number[FC_SERIAL_NUMBER_SIZE];
489
490 /* Dynamic Attributes */
491 u32 port_id;
492 enum fc_port_type port_type;
493 enum fc_port_state port_state;
494 u8 active_fc4s[FC_FC4_LIST_SIZE];
495 u32 speed;
496 u64 fabric_name;
497 char symbolic_name[FC_SYMBOLIC_NAME_SIZE];
498 char system_hostname[FC_SYMBOLIC_NAME_SIZE];
499 u32 dev_loss_tmo;
500
501 /* Private (Transport-managed) Attributes */
502 enum fc_tgtid_binding_type tgtid_bind_type;
503
504 /* internal data */
505 struct list_head rports;
506 struct list_head rport_bindings;
507 struct list_head vports;
508 u32 next_rport_number;
509 u32 next_target_id;
510 u32 next_vport_number;
511 u16 npiv_vports_inuse;
512
513 /* work queues for rport state manipulation */
514 char work_q_name[20];
515 struct workqueue_struct *work_q;
516 char devloss_work_q_name[20];
517 struct workqueue_struct *devloss_work_q;
518
519 /* bsg support */
520 struct request_queue *rqst_q;
521 };
522
523 #define shost_to_fc_host(x) \
524 ((struct fc_host_attrs *)(x)->shost_data)
525
526 #define fc_host_node_name(x) \
527 (((struct fc_host_attrs *)(x)->shost_data)->node_name)
528 #define fc_host_port_name(x) \
529 (((struct fc_host_attrs *)(x)->shost_data)->port_name)
530 #define fc_host_permanent_port_name(x) \
531 (((struct fc_host_attrs *)(x)->shost_data)->permanent_port_name)
532 #define fc_host_supported_classes(x) \
533 (((struct fc_host_attrs *)(x)->shost_data)->supported_classes)
534 #define fc_host_supported_fc4s(x) \
535 (((struct fc_host_attrs *)(x)->shost_data)->supported_fc4s)
536 #define fc_host_supported_speeds(x) \
537 (((struct fc_host_attrs *)(x)->shost_data)->supported_speeds)
538 #define fc_host_maxframe_size(x) \
539 (((struct fc_host_attrs *)(x)->shost_data)->maxframe_size)
540 #define fc_host_max_npiv_vports(x) \
541 (((struct fc_host_attrs *)(x)->shost_data)->max_npiv_vports)
542 #define fc_host_serial_number(x) \
543 (((struct fc_host_attrs *)(x)->shost_data)->serial_number)
544 #define fc_host_port_id(x) \
545 (((struct fc_host_attrs *)(x)->shost_data)->port_id)
546 #define fc_host_port_type(x) \
547 (((struct fc_host_attrs *)(x)->shost_data)->port_type)
548 #define fc_host_port_state(x) \
549 (((struct fc_host_attrs *)(x)->shost_data)->port_state)
550 #define fc_host_active_fc4s(x) \
551 (((struct fc_host_attrs *)(x)->shost_data)->active_fc4s)
552 #define fc_host_speed(x) \
553 (((struct fc_host_attrs *)(x)->shost_data)->speed)
554 #define fc_host_fabric_name(x) \
555 (((struct fc_host_attrs *)(x)->shost_data)->fabric_name)
556 #define fc_host_symbolic_name(x) \
557 (((struct fc_host_attrs *)(x)->shost_data)->symbolic_name)
558 #define fc_host_system_hostname(x) \
559 (((struct fc_host_attrs *)(x)->shost_data)->system_hostname)
560 #define fc_host_tgtid_bind_type(x) \
561 (((struct fc_host_attrs *)(x)->shost_data)->tgtid_bind_type)
562 #define fc_host_rports(x) \
563 (((struct fc_host_attrs *)(x)->shost_data)->rports)
564 #define fc_host_rport_bindings(x) \
565 (((struct fc_host_attrs *)(x)->shost_data)->rport_bindings)
566 #define fc_host_vports(x) \
567 (((struct fc_host_attrs *)(x)->shost_data)->vports)
568 #define fc_host_next_rport_number(x) \
569 (((struct fc_host_attrs *)(x)->shost_data)->next_rport_number)
570 #define fc_host_next_target_id(x) \
571 (((struct fc_host_attrs *)(x)->shost_data)->next_target_id)
572 #define fc_host_next_vport_number(x) \
573 (((struct fc_host_attrs *)(x)->shost_data)->next_vport_number)
574 #define fc_host_npiv_vports_inuse(x) \
575 (((struct fc_host_attrs *)(x)->shost_data)->npiv_vports_inuse)
576 #define fc_host_work_q_name(x) \
577 (((struct fc_host_attrs *)(x)->shost_data)->work_q_name)
578 #define fc_host_work_q(x) \
579 (((struct fc_host_attrs *)(x)->shost_data)->work_q)
580 #define fc_host_devloss_work_q_name(x) \
581 (((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q_name)
582 #define fc_host_devloss_work_q(x) \
583 (((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q)
584 #define fc_host_dev_loss_tmo(x) \
585 (((struct fc_host_attrs *)(x)->shost_data)->dev_loss_tmo)
586
587
588 struct fc_bsg_buffer {
589 unsigned int payload_len;
590 int sg_cnt;
591 struct scatterlist *sg_list;
592 };
593
594 /* Values for fc_bsg_job->state_flags (bitflags) */
595 #define FC_RQST_STATE_INPROGRESS 0
596 #define FC_RQST_STATE_DONE 1
597
598 struct fc_bsg_job {
599 struct Scsi_Host *shost;
600 struct fc_rport *rport;
601 struct device *dev;
602 struct request *req;
603 spinlock_t job_lock;
604 unsigned int state_flags;
605 unsigned int ref_cnt;
606 void (*job_done)(struct fc_bsg_job *);
607
608 struct fc_bsg_request *request;
609 struct fc_bsg_reply *reply;
610 unsigned int request_len;
611 unsigned int reply_len;
612 /*
613 * On entry : reply_len indicates the buffer size allocated for
614 * the reply.
615 *
616 * Upon completion : the message handler must set reply_len
617 * to indicates the size of the reply to be returned to the
618 * caller.
619 */
620
621 /* DMA payloads for the request/response */
622 struct fc_bsg_buffer request_payload;
623 struct fc_bsg_buffer reply_payload;
624
625 void *dd_data; /* Used for driver-specific storage */
626 };
627
628
629 /* The functions by which the transport class and the driver communicate */
630 struct fc_function_template {
631 void (*get_rport_dev_loss_tmo)(struct fc_rport *);
632 void (*set_rport_dev_loss_tmo)(struct fc_rport *, u32);
633
634 void (*get_starget_node_name)(struct scsi_target *);
635 void (*get_starget_port_name)(struct scsi_target *);
636 void (*get_starget_port_id)(struct scsi_target *);
637
638 void (*get_host_port_id)(struct Scsi_Host *);
639 void (*get_host_port_type)(struct Scsi_Host *);
640 void (*get_host_port_state)(struct Scsi_Host *);
641 void (*get_host_active_fc4s)(struct Scsi_Host *);
642 void (*get_host_speed)(struct Scsi_Host *);
643 void (*get_host_fabric_name)(struct Scsi_Host *);
644 void (*get_host_symbolic_name)(struct Scsi_Host *);
645 void (*set_host_system_hostname)(struct Scsi_Host *);
646
647 struct fc_host_statistics * (*get_fc_host_stats)(struct Scsi_Host *);
648 void (*reset_fc_host_stats)(struct Scsi_Host *);
649
650 int (*issue_fc_host_lip)(struct Scsi_Host *);
651
652 void (*dev_loss_tmo_callbk)(struct fc_rport *);
653 void (*terminate_rport_io)(struct fc_rport *);
654
655 void (*set_vport_symbolic_name)(struct fc_vport *);
656 int (*vport_create)(struct fc_vport *, bool);
657 int (*vport_disable)(struct fc_vport *, bool);
658 int (*vport_delete)(struct fc_vport *);
659
660 /* target-mode drivers' functions */
661 int (* tsk_mgmt_response)(struct Scsi_Host *, u64, u64, int);
662 int (* it_nexus_response)(struct Scsi_Host *, u64, int);
663
664 /* bsg support */
665 int (*bsg_request)(struct fc_bsg_job *);
666 int (*bsg_timeout)(struct fc_bsg_job *);
667
668 /* allocation lengths for host-specific data */
669 u32 dd_fcrport_size;
670 u32 dd_fcvport_size;
671 u32 dd_bsg_size;
672
673 /*
674 * The driver sets these to tell the transport class it
675 * wants the attributes displayed in sysfs. If the show_ flag
676 * is not set, the attribute will be private to the transport
677 * class
678 */
679
680 /* remote port fixed attributes */
681 unsigned long show_rport_maxframe_size:1;
682 unsigned long show_rport_supported_classes:1;
683 unsigned long show_rport_dev_loss_tmo:1;
684
685 /*
686 * target dynamic attributes
687 * These should all be "1" if the driver uses the remote port
688 * add/delete functions (so attributes reflect rport values).
689 */
690 unsigned long show_starget_node_name:1;
691 unsigned long show_starget_port_name:1;
692 unsigned long show_starget_port_id:1;
693
694 /* host fixed attributes */
695 unsigned long show_host_node_name:1;
696 unsigned long show_host_port_name:1;
697 unsigned long show_host_permanent_port_name:1;
698 unsigned long show_host_supported_classes:1;
699 unsigned long show_host_supported_fc4s:1;
700 unsigned long show_host_supported_speeds:1;
701 unsigned long show_host_maxframe_size:1;
702 unsigned long show_host_serial_number:1;
703 /* host dynamic attributes */
704 unsigned long show_host_port_id:1;
705 unsigned long show_host_port_type:1;
706 unsigned long show_host_port_state:1;
707 unsigned long show_host_active_fc4s:1;
708 unsigned long show_host_speed:1;
709 unsigned long show_host_fabric_name:1;
710 unsigned long show_host_symbolic_name:1;
711 unsigned long show_host_system_hostname:1;
712
713 unsigned long disable_target_scan:1;
714 };
715
716
717 /**
718 * fc_remote_port_chkready - called to validate the remote port state
719 * prior to initiating io to the port.
720 *
721 * Returns a scsi result code that can be returned by the LLDD.
722 *
723 * @rport: remote port to be checked
724 **/
725 static inline int
fc_remote_port_chkready(struct fc_rport * rport)726 fc_remote_port_chkready(struct fc_rport *rport)
727 {
728 int result;
729
730 switch (rport->port_state) {
731 case FC_PORTSTATE_ONLINE:
732 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
733 result = 0;
734 else if (rport->flags & FC_RPORT_DEVLOSS_PENDING)
735 result = DID_IMM_RETRY << 16;
736 else
737 result = DID_NO_CONNECT << 16;
738 break;
739 case FC_PORTSTATE_BLOCKED:
740 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
741 result = DID_TRANSPORT_FAILFAST << 16;
742 else
743 result = DID_IMM_RETRY << 16;
744 break;
745 default:
746 result = DID_NO_CONNECT << 16;
747 break;
748 }
749 return result;
750 }
751
wwn_to_u64(u8 * wwn)752 static inline u64 wwn_to_u64(u8 *wwn)
753 {
754 return (u64)wwn[0] << 56 | (u64)wwn[1] << 48 |
755 (u64)wwn[2] << 40 | (u64)wwn[3] << 32 |
756 (u64)wwn[4] << 24 | (u64)wwn[5] << 16 |
757 (u64)wwn[6] << 8 | (u64)wwn[7];
758 }
759
u64_to_wwn(u64 inm,u8 * wwn)760 static inline void u64_to_wwn(u64 inm, u8 *wwn)
761 {
762 wwn[0] = (inm >> 56) & 0xff;
763 wwn[1] = (inm >> 48) & 0xff;
764 wwn[2] = (inm >> 40) & 0xff;
765 wwn[3] = (inm >> 32) & 0xff;
766 wwn[4] = (inm >> 24) & 0xff;
767 wwn[5] = (inm >> 16) & 0xff;
768 wwn[6] = (inm >> 8) & 0xff;
769 wwn[7] = inm & 0xff;
770 }
771
772 /**
773 * fc_vport_set_state() - called to set a vport's state. Saves the old state,
774 * excepting the transitory states of initializing and sending the ELS
775 * traffic to instantiate the vport on the link.
776 *
777 * Assumes the driver has surrounded this with the proper locking to ensure
778 * a coherent state change.
779 *
780 * @vport: virtual port whose state is changing
781 * @new_state: new state
782 **/
783 static inline void
fc_vport_set_state(struct fc_vport * vport,enum fc_vport_state new_state)784 fc_vport_set_state(struct fc_vport *vport, enum fc_vport_state new_state)
785 {
786 if ((new_state != FC_VPORT_UNKNOWN) &&
787 (new_state != FC_VPORT_INITIALIZING))
788 vport->vport_last_state = vport->vport_state;
789 vport->vport_state = new_state;
790 }
791
792 struct scsi_transport_template *fc_attach_transport(
793 struct fc_function_template *);
794 void fc_release_transport(struct scsi_transport_template *);
795 void fc_remove_host(struct Scsi_Host *);
796 struct fc_rport *fc_remote_port_add(struct Scsi_Host *shost,
797 int channel, struct fc_rport_identifiers *ids);
798 void fc_remote_port_delete(struct fc_rport *rport);
799 void fc_remote_port_rolechg(struct fc_rport *rport, u32 roles);
800 int scsi_is_fc_rport(const struct device *);
801 u32 fc_get_event_number(void);
802 void fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
803 enum fc_host_event_code event_code, u32 event_data);
804 void fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
805 u32 data_len, char * data_buf, u64 vendor_id);
806 /* Note: when specifying vendor_id to fc_host_post_vendor_event()
807 * be sure to read the Vendor Type and ID formatting requirements
808 * specified in scsi_netlink.h
809 */
810 struct fc_vport *fc_vport_create(struct Scsi_Host *shost, int channel,
811 struct fc_vport_identifiers *);
812 int fc_vport_terminate(struct fc_vport *vport);
813 int fc_block_scsi_eh(struct scsi_cmnd *cmnd);
814
815 #endif /* SCSI_TRANSPORT_FC_H */
816