1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * FiberChannel transport specific attributes exported to sysfs.
4 *
5 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
6 * Copyright (C) 2004-2007 James Smart, Emulex Corporation
7 * Rewrite for host, target, device, and remote port attributes,
8 * statistics, and service functions...
9 */
10 #ifndef SCSI_TRANSPORT_FC_H
11 #define SCSI_TRANSPORT_FC_H
12
13 #include <linux/sched.h>
14 #include <linux/bsg-lib.h>
15 #include <linux/unaligned.h>
16 #include <scsi/scsi.h>
17 #include <scsi/scsi_netlink.h>
18 #include <scsi/scsi_host.h>
19
20 struct scsi_transport_template;
21
22 /*
23 * FC Port definitions - Following FC HBAAPI guidelines
24 *
25 * Note: Not all binary values for the different fields match HBAAPI.
26 * Instead, we use densely packed ordinal values or enums.
27 * We get away with this as we never present the actual binary values
28 * externally. For sysfs, we always present the string that describes
29 * the value. Thus, an admin doesn't need a magic HBAAPI decoder ring
30 * to understand the values. The HBAAPI user-space library is free to
31 * convert the strings into the HBAAPI-specified binary values.
32 *
33 * Note: Not all HBAAPI-defined values are contained in the definitions
34 * below. Those not appropriate to an fc_host (e.g. FCP initiator) have
35 * been removed.
36 */
37
38 /*
39 * fc_port_type: If you alter this, you also need to alter scsi_transport_fc.c
40 * (for the ascii descriptions).
41 */
42 enum fc_port_type {
43 FC_PORTTYPE_UNKNOWN,
44 FC_PORTTYPE_OTHER,
45 FC_PORTTYPE_NOTPRESENT,
46 FC_PORTTYPE_NPORT, /* Attached to FPort */
47 FC_PORTTYPE_NLPORT, /* (Public) Loop w/ FLPort */
48 FC_PORTTYPE_LPORT, /* (Private) Loop w/o FLPort */
49 FC_PORTTYPE_PTP, /* Point to Point w/ another NPort */
50 FC_PORTTYPE_NPIV, /* VPORT based on NPIV */
51 };
52
53
54 /*
55 * fc_port_state: If you alter this, you also need to alter scsi_transport_fc.c
56 * (for the ascii descriptions).
57 */
58 enum fc_port_state {
59 FC_PORTSTATE_UNKNOWN,
60 FC_PORTSTATE_NOTPRESENT,
61 FC_PORTSTATE_ONLINE,
62 FC_PORTSTATE_OFFLINE, /* User has taken Port Offline */
63 FC_PORTSTATE_BLOCKED,
64 FC_PORTSTATE_BYPASSED,
65 FC_PORTSTATE_DIAGNOSTICS,
66 FC_PORTSTATE_LINKDOWN,
67 FC_PORTSTATE_ERROR,
68 FC_PORTSTATE_LOOPBACK,
69 FC_PORTSTATE_DELETED,
70 FC_PORTSTATE_MARGINAL,
71 };
72
73
74 /*
75 * fc_vport_state: If you alter this, you also need to alter
76 * scsi_transport_fc.c (for the ascii descriptions).
77 */
78 enum fc_vport_state {
79 FC_VPORT_UNKNOWN,
80 FC_VPORT_ACTIVE,
81 FC_VPORT_DISABLED,
82 FC_VPORT_LINKDOWN,
83 FC_VPORT_INITIALIZING,
84 FC_VPORT_NO_FABRIC_SUPP,
85 FC_VPORT_NO_FABRIC_RSCS,
86 FC_VPORT_FABRIC_LOGOUT,
87 FC_VPORT_FABRIC_REJ_WWN,
88 FC_VPORT_FAILED,
89 };
90
91
92
93 /*
94 * FC Classes of Service
95 * Note: values are not enumerated, as they can be "or'd" together
96 * for reporting (e.g. report supported_classes). If you alter this list,
97 * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
98 */
99 #define FC_COS_UNSPECIFIED 0
100 #define FC_COS_CLASS1 2
101 #define FC_COS_CLASS2 4
102 #define FC_COS_CLASS3 8
103 #define FC_COS_CLASS4 0x10
104 #define FC_COS_CLASS6 0x40
105
106 /*
107 * FC Port Speeds
108 * Note: values are not enumerated, as they can be "or'd" together
109 * for reporting (e.g. report supported_speeds). If you alter this list,
110 * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
111 */
112 #define FC_PORTSPEED_UNKNOWN 0 /* Unknown - transceiver
113 incapable of reporting */
114 #define FC_PORTSPEED_1GBIT 1
115 #define FC_PORTSPEED_2GBIT 2
116 #define FC_PORTSPEED_10GBIT 4
117 #define FC_PORTSPEED_4GBIT 8
118 #define FC_PORTSPEED_8GBIT 0x10
119 #define FC_PORTSPEED_16GBIT 0x20
120 #define FC_PORTSPEED_32GBIT 0x40
121 #define FC_PORTSPEED_20GBIT 0x80
122 #define FC_PORTSPEED_40GBIT 0x100
123 #define FC_PORTSPEED_50GBIT 0x200
124 #define FC_PORTSPEED_100GBIT 0x400
125 #define FC_PORTSPEED_25GBIT 0x800
126 #define FC_PORTSPEED_64GBIT 0x1000
127 #define FC_PORTSPEED_128GBIT 0x2000
128 #define FC_PORTSPEED_256GBIT 0x4000
129 #define FC_PORTSPEED_NOT_NEGOTIATED (1 << 15) /* Speed not established */
130
131 /*
132 * fc_tgtid_binding_type: If you alter this, you also need to alter
133 * scsi_transport_fc.c (for the ascii descriptions).
134 */
135 enum fc_tgtid_binding_type {
136 FC_TGTID_BIND_NONE,
137 FC_TGTID_BIND_BY_WWPN,
138 FC_TGTID_BIND_BY_WWNN,
139 FC_TGTID_BIND_BY_ID,
140 };
141
142 /*
143 * FC Port Roles
144 * Note: values are not enumerated, as they can be "or'd" together
145 * for reporting (e.g. report roles). If you alter this list,
146 * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
147 */
148 #define FC_PORT_ROLE_UNKNOWN 0x00
149 #define FC_PORT_ROLE_FCP_TARGET 0x01
150 #define FC_PORT_ROLE_FCP_INITIATOR 0x02
151 #define FC_PORT_ROLE_IP_PORT 0x04
152 #define FC_PORT_ROLE_FCP_DUMMY_INITIATOR 0x08
153 #define FC_PORT_ROLE_NVME_INITIATOR 0x10
154 #define FC_PORT_ROLE_NVME_TARGET 0x20
155 #define FC_PORT_ROLE_NVME_DISCOVERY 0x40
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 * Fabric Performance Impact Notification Statistics
291 */
292 struct fc_fpin_stats {
293 /* Delivery */
294 u64 dn;
295 u64 dn_unknown;
296 u64 dn_timeout;
297 u64 dn_unable_to_route;
298 u64 dn_device_specific;
299
300 /* Link Integrity */
301 u64 li;
302 u64 li_failure_unknown;
303 u64 li_link_failure_count;
304 u64 li_loss_of_sync_count;
305 u64 li_loss_of_signals_count;
306 u64 li_prim_seq_err_count;
307 u64 li_invalid_tx_word_count;
308 u64 li_invalid_crc_count;
309 u64 li_device_specific;
310
311 /* Congestion/Peer Congestion */
312 u64 cn;
313 u64 cn_clear;
314 u64 cn_lost_credit;
315 u64 cn_credit_stall;
316 u64 cn_oversubscription;
317 u64 cn_device_specific;
318 };
319
320 #define FC_RPORT_ENCRYPTION_STATUS_MAX_LEN 14
321 /*
322 * Encryption Information
323 */
324 struct fc_encryption_info {
325 /* Encryption Status */
326 u8 status;
327 };
328
329 /* Macro for use in defining Remote Port attributes */
330 #define FC_RPORT_ATTR(_name,_mode,_show,_store) \
331 struct device_attribute dev_attr_rport_##_name = \
332 __ATTR(_name,_mode,_show,_store)
333
334
335 /*
336 * FC Remote Port Attributes
337 *
338 * This structure exists for each remote FC port that a LLDD notifies
339 * the subsystem of. A remote FC port may or may not be a SCSI Target,
340 * also be a SCSI initiator, IP endpoint, etc. As such, the remote
341 * port is considered a separate entity, independent of "role" (such
342 * as scsi target).
343 *
344 * --
345 *
346 * Attributes are based on HBAAPI V2.0 definitions. Only those
347 * attributes that are determinable by the local port (aka Host)
348 * are contained.
349 *
350 * Fixed attributes are not expected to change. The driver is
351 * expected to set these values after successfully calling
352 * fc_remote_port_add(). The transport fully manages all get functions
353 * w/o driver interaction.
354 *
355 * Dynamic attributes are expected to change. The driver participates
356 * in all get/set operations via functions provided by the driver.
357 *
358 * Private attributes are transport-managed values. They are fully
359 * managed by the transport w/o driver interaction.
360 */
361
362 struct fc_rport { /* aka fc_starget_attrs */
363 /* Fixed Attributes */
364 u32 maxframe_size;
365 u32 supported_classes;
366
367 /* Dynamic Attributes */
368 u32 dev_loss_tmo; /* Remote Port loss timeout in seconds. */
369 struct fc_fpin_stats fpin_stats;
370
371 /* Private (Transport-managed) Attributes */
372 u64 node_name;
373 u64 port_name;
374 u32 port_id;
375 u32 roles;
376 struct fc_encryption_info enc_info;
377 enum fc_port_state port_state; /* Will only be ONLINE or UNKNOWN */
378 u32 scsi_target_id;
379 u32 fast_io_fail_tmo;
380
381 /* exported data */
382 void *dd_data; /* Used for driver-specific storage */
383
384 /* internal data */
385 unsigned int channel;
386 u32 number;
387 u8 flags;
388 struct list_head peers;
389 struct device dev;
390 struct delayed_work dev_loss_work;
391 struct work_struct scan_work;
392 struct delayed_work fail_io_work;
393 struct work_struct stgt_delete_work;
394 struct work_struct rport_delete_work;
395 struct request_queue *rqst_q; /* bsg support */
396
397 struct workqueue_struct *devloss_work_q;
398 } __attribute__((aligned(sizeof(unsigned long))));
399
400 /* bit field values for struct fc_rport "flags" field: */
401 #define FC_RPORT_DEVLOSS_PENDING 0x01
402 #define FC_RPORT_SCAN_PENDING 0x02
403 #define FC_RPORT_FAST_FAIL_TIMEDOUT 0x04
404 #define FC_RPORT_DEVLOSS_CALLBK_DONE 0x08
405
406 #define dev_to_rport(d) \
407 container_of(d, struct fc_rport, dev)
408 #define transport_class_to_rport(dev) \
409 dev_to_rport(dev->parent)
410 #define rport_to_shost(r) \
411 dev_to_shost(r->dev.parent)
412
413 /*
414 * FC SCSI Target Attributes
415 *
416 * The SCSI Target is considered an extension of a remote port (as
417 * a remote port can be more than a SCSI Target). Within the scsi
418 * subsystem, we leave the Target as a separate entity. Doing so
419 * provides backward compatibility with prior FC transport api's,
420 * and lets remote ports be handled entirely within the FC transport
421 * and independently from the scsi subsystem. The drawback is that
422 * some data will be duplicated.
423 */
424
425 struct fc_starget_attrs { /* aka fc_target_attrs */
426 /* Dynamic Attributes */
427 u64 node_name;
428 u64 port_name;
429 u32 port_id;
430 };
431
432 #define fc_starget_node_name(x) \
433 (((struct fc_starget_attrs *)&(x)->starget_data)->node_name)
434 #define fc_starget_port_name(x) \
435 (((struct fc_starget_attrs *)&(x)->starget_data)->port_name)
436 #define fc_starget_port_id(x) \
437 (((struct fc_starget_attrs *)&(x)->starget_data)->port_id)
438
439 #define starget_to_rport(s) \
440 scsi_is_fc_rport(s->dev.parent) ? dev_to_rport(s->dev.parent) : NULL
441
442
443 /*
444 * FC Local Port (Host) Statistics
445 */
446
447 /* FC Statistics - Following FC HBAAPI v2.0 guidelines */
448 struct fc_host_statistics {
449 /* port statistics */
450 u64 seconds_since_last_reset;
451 u64 tx_frames;
452 u64 tx_words;
453 u64 rx_frames;
454 u64 rx_words;
455 u64 lip_count;
456 u64 nos_count;
457 u64 error_frames;
458 u64 dumped_frames;
459 u64 link_failure_count;
460 u64 loss_of_sync_count;
461 u64 loss_of_signal_count;
462 u64 prim_seq_protocol_err_count;
463 u64 invalid_tx_word_count;
464 u64 invalid_crc_count;
465
466 /* fc4 statistics (only FCP supported currently) */
467 u64 fcp_input_requests;
468 u64 fcp_output_requests;
469 u64 fcp_control_requests;
470 u64 fcp_input_megabytes;
471 u64 fcp_output_megabytes;
472 u64 fcp_packet_alloc_failures; /* fcp packet allocation failures */
473 u64 fcp_packet_aborts; /* fcp packet aborted */
474 u64 fcp_frame_alloc_failures; /* fcp frame allocation failures */
475
476 /* fc exches statistics */
477 u64 fc_no_free_exch; /* no free exch memory */
478 u64 fc_no_free_exch_xid; /* no free exch id */
479 u64 fc_xid_not_found; /* exch not found for a response */
480 u64 fc_xid_busy; /* exch exist for new a request */
481 u64 fc_seq_not_found; /* seq is not found for exchange */
482 u64 fc_non_bls_resp; /* a non BLS response frame with
483 a sequence responder in new exch */
484 /* Host Congestion Signals */
485 u64 cn_sig_warn;
486 u64 cn_sig_alarm;
487 };
488
489
490 /*
491 * FC Event Codes - Polled and Async, following FC HBAAPI v2.0 guidelines
492 */
493
494 /*
495 * fc_host_event_code: If you alter this, you also need to alter
496 * scsi_transport_fc.c (for the ascii descriptions).
497 */
498 enum fc_host_event_code {
499 FCH_EVT_LIP = 0x1,
500 FCH_EVT_LINKUP = 0x2,
501 FCH_EVT_LINKDOWN = 0x3,
502 FCH_EVT_LIPRESET = 0x4,
503 FCH_EVT_RSCN = 0x5,
504 FCH_EVT_ADAPTER_CHANGE = 0x103,
505 FCH_EVT_PORT_UNKNOWN = 0x200,
506 FCH_EVT_PORT_OFFLINE = 0x201,
507 FCH_EVT_PORT_ONLINE = 0x202,
508 FCH_EVT_PORT_FABRIC = 0x204,
509 FCH_EVT_LINK_UNKNOWN = 0x500,
510 FCH_EVT_LINK_FPIN = 0x501,
511 FCH_EVT_LINK_FPIN_ACK = 0x502,
512 FCH_EVT_VENDOR_UNIQUE = 0xffff,
513 };
514
515
516 /*
517 * FC Local Port (Host) Attributes
518 *
519 * Attributes are based on HBAAPI V2.0 definitions.
520 * Note: OSDeviceName is determined by user-space library
521 *
522 * Fixed attributes are not expected to change. The driver is
523 * expected to set these values after successfully calling scsi_add_host().
524 * The transport fully manages all get functions w/o driver interaction.
525 *
526 * Dynamic attributes are expected to change. The driver participates
527 * in all get/set operations via functions provided by the driver.
528 *
529 * Private attributes are transport-managed values. They are fully
530 * managed by the transport w/o driver interaction.
531 */
532
533 #define FC_VENDOR_IDENTIFIER 8
534 #define FC_FC4_LIST_SIZE 32
535 #define FC_SYMBOLIC_NAME_SIZE 256
536 #define FC_VERSION_STRING_SIZE 64
537 #define FC_SERIAL_NUMBER_SIZE 64
538
539 struct fc_host_attrs {
540 /* Fixed Attributes */
541 u64 node_name;
542 u64 port_name;
543 u64 permanent_port_name;
544 u32 supported_classes;
545 u8 supported_fc4s[FC_FC4_LIST_SIZE];
546 u32 supported_speeds;
547 u32 maxframe_size;
548 u16 max_npiv_vports;
549 u32 max_ct_payload;
550 u32 num_ports;
551 u32 num_discovered_ports;
552 u32 bootbios_state;
553 char serial_number[FC_SERIAL_NUMBER_SIZE];
554 char manufacturer[FC_SERIAL_NUMBER_SIZE];
555 char model[FC_SYMBOLIC_NAME_SIZE];
556 char model_description[FC_SYMBOLIC_NAME_SIZE];
557 char hardware_version[FC_VERSION_STRING_SIZE];
558 char driver_version[FC_VERSION_STRING_SIZE];
559 char firmware_version[FC_VERSION_STRING_SIZE];
560 char optionrom_version[FC_VERSION_STRING_SIZE];
561 char vendor_identifier[FC_VENDOR_IDENTIFIER];
562 char bootbios_version[FC_SYMBOLIC_NAME_SIZE];
563
564
565 /* Dynamic Attributes */
566 u32 port_id;
567 enum fc_port_type port_type;
568 enum fc_port_state port_state;
569 u8 active_fc4s[FC_FC4_LIST_SIZE];
570 u32 speed;
571 u64 fabric_name;
572 char symbolic_name[FC_SYMBOLIC_NAME_SIZE];
573 char system_hostname[FC_SYMBOLIC_NAME_SIZE];
574 u32 dev_loss_tmo;
575 struct fc_fpin_stats fpin_stats;
576
577 /* Private (Transport-managed) Attributes */
578 enum fc_tgtid_binding_type tgtid_bind_type;
579
580 /* internal data */
581 struct list_head rports;
582 struct list_head rport_bindings;
583 struct list_head vports;
584 u32 next_rport_number;
585 u32 next_target_id;
586 u32 next_vport_number;
587 u16 npiv_vports_inuse;
588
589 /* work queues for rport state manipulation */
590 struct workqueue_struct *work_q;
591
592 /* bsg support */
593 struct request_queue *rqst_q;
594
595 /* FDMI support version*/
596 u8 fdmi_version;
597 };
598
599 #define shost_to_fc_host(x) \
600 ((struct fc_host_attrs *)(x)->shost_data)
601
602 #define fc_host_node_name(x) \
603 (((struct fc_host_attrs *)(x)->shost_data)->node_name)
604 #define fc_host_port_name(x) \
605 (((struct fc_host_attrs *)(x)->shost_data)->port_name)
606 #define fc_host_permanent_port_name(x) \
607 (((struct fc_host_attrs *)(x)->shost_data)->permanent_port_name)
608 #define fc_host_supported_classes(x) \
609 (((struct fc_host_attrs *)(x)->shost_data)->supported_classes)
610 #define fc_host_supported_fc4s(x) \
611 (((struct fc_host_attrs *)(x)->shost_data)->supported_fc4s)
612 #define fc_host_supported_speeds(x) \
613 (((struct fc_host_attrs *)(x)->shost_data)->supported_speeds)
614 #define fc_host_maxframe_size(x) \
615 (((struct fc_host_attrs *)(x)->shost_data)->maxframe_size)
616 #define fc_host_max_npiv_vports(x) \
617 (((struct fc_host_attrs *)(x)->shost_data)->max_npiv_vports)
618 #define fc_host_serial_number(x) \
619 (((struct fc_host_attrs *)(x)->shost_data)->serial_number)
620 #define fc_host_manufacturer(x) \
621 (((struct fc_host_attrs *)(x)->shost_data)->manufacturer)
622 #define fc_host_model(x) \
623 (((struct fc_host_attrs *)(x)->shost_data)->model)
624 #define fc_host_model_description(x) \
625 (((struct fc_host_attrs *)(x)->shost_data)->model_description)
626 #define fc_host_hardware_version(x) \
627 (((struct fc_host_attrs *)(x)->shost_data)->hardware_version)
628 #define fc_host_driver_version(x) \
629 (((struct fc_host_attrs *)(x)->shost_data)->driver_version)
630 #define fc_host_firmware_version(x) \
631 (((struct fc_host_attrs *)(x)->shost_data)->firmware_version)
632 #define fc_host_optionrom_version(x) \
633 (((struct fc_host_attrs *)(x)->shost_data)->optionrom_version)
634 #define fc_host_port_id(x) \
635 (((struct fc_host_attrs *)(x)->shost_data)->port_id)
636 #define fc_host_port_type(x) \
637 (((struct fc_host_attrs *)(x)->shost_data)->port_type)
638 #define fc_host_port_state(x) \
639 (((struct fc_host_attrs *)(x)->shost_data)->port_state)
640 #define fc_host_active_fc4s(x) \
641 (((struct fc_host_attrs *)(x)->shost_data)->active_fc4s)
642 #define fc_host_speed(x) \
643 (((struct fc_host_attrs *)(x)->shost_data)->speed)
644 #define fc_host_fabric_name(x) \
645 (((struct fc_host_attrs *)(x)->shost_data)->fabric_name)
646 #define fc_host_symbolic_name(x) \
647 (((struct fc_host_attrs *)(x)->shost_data)->symbolic_name)
648 #define fc_host_system_hostname(x) \
649 (((struct fc_host_attrs *)(x)->shost_data)->system_hostname)
650 #define fc_host_tgtid_bind_type(x) \
651 (((struct fc_host_attrs *)(x)->shost_data)->tgtid_bind_type)
652 #define fc_host_rports(x) \
653 (((struct fc_host_attrs *)(x)->shost_data)->rports)
654 #define fc_host_rport_bindings(x) \
655 (((struct fc_host_attrs *)(x)->shost_data)->rport_bindings)
656 #define fc_host_vports(x) \
657 (((struct fc_host_attrs *)(x)->shost_data)->vports)
658 #define fc_host_next_rport_number(x) \
659 (((struct fc_host_attrs *)(x)->shost_data)->next_rport_number)
660 #define fc_host_next_target_id(x) \
661 (((struct fc_host_attrs *)(x)->shost_data)->next_target_id)
662 #define fc_host_next_vport_number(x) \
663 (((struct fc_host_attrs *)(x)->shost_data)->next_vport_number)
664 #define fc_host_npiv_vports_inuse(x) \
665 (((struct fc_host_attrs *)(x)->shost_data)->npiv_vports_inuse)
666 #define fc_host_work_q(x) \
667 (((struct fc_host_attrs *)(x)->shost_data)->work_q)
668 #define fc_host_dev_loss_tmo(x) \
669 (((struct fc_host_attrs *)(x)->shost_data)->dev_loss_tmo)
670 #define fc_host_max_ct_payload(x) \
671 (((struct fc_host_attrs *)(x)->shost_data)->max_ct_payload)
672 #define fc_host_vendor_identifier(x) \
673 (((struct fc_host_attrs *)(x)->shost_data)->vendor_identifier)
674 #define fc_host_num_discovered_ports(x) \
675 (((struct fc_host_attrs *)(x)->shost_data)->num_discovered_ports)
676 #define fc_host_num_ports(x) \
677 (((struct fc_host_attrs *)(x)->shost_data)->num_ports)
678 #define fc_host_bootbios_version(x) \
679 (((struct fc_host_attrs *)(x)->shost_data)->bootbios_version)
680 #define fc_host_bootbios_state(x) \
681 (((struct fc_host_attrs *)(x)->shost_data)->bootbios_state)
682
683 /* The functions by which the transport class and the driver communicate */
684 struct fc_function_template {
685 void (*get_rport_dev_loss_tmo)(struct fc_rport *);
686 void (*set_rport_dev_loss_tmo)(struct fc_rport *, u32);
687
688 void (*get_starget_node_name)(struct scsi_target *);
689 void (*get_starget_port_name)(struct scsi_target *);
690 void (*get_starget_port_id)(struct scsi_target *);
691
692 void (*get_host_port_id)(struct Scsi_Host *);
693 void (*get_host_port_type)(struct Scsi_Host *);
694 void (*get_host_port_state)(struct Scsi_Host *);
695 void (*get_host_active_fc4s)(struct Scsi_Host *);
696 void (*get_host_speed)(struct Scsi_Host *);
697 void (*get_host_fabric_name)(struct Scsi_Host *);
698 void (*get_host_symbolic_name)(struct Scsi_Host *);
699 void (*set_host_system_hostname)(struct Scsi_Host *);
700
701 struct fc_host_statistics * (*get_fc_host_stats)(struct Scsi_Host *);
702 void (*reset_fc_host_stats)(struct Scsi_Host *);
703
704 struct fc_encryption_info * (*get_fc_rport_enc_info)(struct fc_rport *);
705
706 int (*issue_fc_host_lip)(struct Scsi_Host *);
707
708 void (*dev_loss_tmo_callbk)(struct fc_rport *);
709 void (*terminate_rport_io)(struct fc_rport *);
710
711 void (*set_vport_symbolic_name)(struct fc_vport *);
712 int (*vport_create)(struct fc_vport *, bool);
713 int (*vport_disable)(struct fc_vport *, bool);
714 int (*vport_delete)(struct fc_vport *);
715
716 /* bsg support */
717 u32 max_bsg_segments;
718 int (*bsg_request)(struct bsg_job *);
719 int (*bsg_timeout)(struct bsg_job *);
720
721 /* allocation lengths for host-specific data */
722 u32 dd_fcrport_size;
723 u32 dd_fcvport_size;
724 u32 dd_bsg_size;
725
726 /*
727 * The driver sets these to tell the transport class it
728 * wants the attributes displayed in sysfs. If the show_ flag
729 * is not set, the attribute will be private to the transport
730 * class
731 */
732
733 /* remote port fixed attributes */
734 unsigned long show_rport_maxframe_size:1;
735 unsigned long show_rport_supported_classes:1;
736 unsigned long show_rport_dev_loss_tmo:1;
737
738 /*
739 * target dynamic attributes
740 * These should all be "1" if the driver uses the remote port
741 * add/delete functions (so attributes reflect rport values).
742 */
743 unsigned long show_starget_node_name:1;
744 unsigned long show_starget_port_name:1;
745 unsigned long show_starget_port_id:1;
746
747 /* host fixed attributes */
748 unsigned long show_host_node_name:1;
749 unsigned long show_host_port_name:1;
750 unsigned long show_host_permanent_port_name:1;
751 unsigned long show_host_supported_classes:1;
752 unsigned long show_host_supported_fc4s:1;
753 unsigned long show_host_supported_speeds:1;
754 unsigned long show_host_maxframe_size:1;
755 unsigned long show_host_serial_number:1;
756 unsigned long show_host_manufacturer:1;
757 unsigned long show_host_model:1;
758 unsigned long show_host_model_description:1;
759 unsigned long show_host_hardware_version:1;
760 unsigned long show_host_driver_version:1;
761 unsigned long show_host_firmware_version:1;
762 unsigned long show_host_optionrom_version:1;
763 /* host dynamic attributes */
764 unsigned long show_host_port_id:1;
765 unsigned long show_host_port_type:1;
766 unsigned long show_host_port_state:1;
767 unsigned long show_host_active_fc4s:1;
768 unsigned long show_host_speed:1;
769 unsigned long show_host_fabric_name:1;
770 unsigned long show_host_symbolic_name:1;
771 unsigned long show_host_system_hostname:1;
772
773 unsigned long disable_target_scan:1;
774 };
775
776 /**
777 * fc_remote_port_chkready - called to validate the remote port state
778 * prior to initiating io to the port.
779 * @rport: remote port to be checked
780 *
781 * Returns: a scsi result code that can be returned by the LLDD.
782 **/
783 static inline int
fc_remote_port_chkready(struct fc_rport * rport)784 fc_remote_port_chkready(struct fc_rport *rport)
785 {
786 int result;
787
788 switch (rport->port_state) {
789 case FC_PORTSTATE_ONLINE:
790 case FC_PORTSTATE_MARGINAL:
791 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
792 result = 0;
793 else if (rport->flags & FC_RPORT_DEVLOSS_PENDING)
794 result = DID_IMM_RETRY << 16;
795 else
796 result = DID_NO_CONNECT << 16;
797 break;
798 case FC_PORTSTATE_BLOCKED:
799 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
800 result = DID_TRANSPORT_FAILFAST << 16;
801 else
802 result = DID_IMM_RETRY << 16;
803 break;
804 default:
805 result = DID_NO_CONNECT << 16;
806 break;
807 }
808 return result;
809 }
810
wwn_to_u64(const u8 * wwn)811 static inline u64 wwn_to_u64(const u8 *wwn)
812 {
813 return get_unaligned_be64(wwn);
814 }
815
u64_to_wwn(u64 inm,u8 * wwn)816 static inline void u64_to_wwn(u64 inm, u8 *wwn)
817 {
818 put_unaligned_be64(inm, wwn);
819 }
820
821 /**
822 * fc_vport_set_state() - called to set a vport's state. Saves the old state,
823 * excepting the transitory states of initializing and sending the ELS
824 * traffic to instantiate the vport on the link.
825 *
826 * Assumes the driver has surrounded this with the proper locking to ensure
827 * a coherent state change.
828 *
829 * @vport: virtual port whose state is changing
830 * @new_state: new state
831 **/
832 static inline void
fc_vport_set_state(struct fc_vport * vport,enum fc_vport_state new_state)833 fc_vport_set_state(struct fc_vport *vport, enum fc_vport_state new_state)
834 {
835 if ((new_state != FC_VPORT_UNKNOWN) &&
836 (new_state != FC_VPORT_INITIALIZING))
837 vport->vport_last_state = vport->vport_state;
838 vport->vport_state = new_state;
839 }
840
841 struct scsi_transport_template *fc_attach_transport(
842 struct fc_function_template *);
843 void fc_release_transport(struct scsi_transport_template *);
844 void fc_remove_host(struct Scsi_Host *);
845 struct fc_rport *fc_remote_port_add(struct Scsi_Host *shost,
846 int channel, struct fc_rport_identifiers *ids);
847 void fc_remote_port_delete(struct fc_rport *rport);
848 void fc_remote_port_rolechg(struct fc_rport *rport, u32 roles);
849 int scsi_is_fc_rport(const struct device *);
850 u32 fc_get_event_number(void);
851 void fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
852 enum fc_host_event_code event_code, u32 event_data);
853 void fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
854 u32 data_len, char *data_buf, u64 vendor_id);
855 struct fc_rport *fc_find_rport_by_wwpn(struct Scsi_Host *shost, u64 wwpn);
856 void fc_host_post_fc_event(struct Scsi_Host *shost, u32 event_number,
857 enum fc_host_event_code event_code,
858 u32 data_len, char *data_buf, u64 vendor_id);
859 /* Note: when specifying vendor_id to fc_host_post_vendor_event()
860 * or fc_host_post_fc_event(), be sure to read the Vendor Type
861 * and ID formatting requirements specified in scsi_netlink.h
862 * Note: when calling fc_host_post_fc_event(), vendor_id may be
863 * specified as 0.
864 */
865 void fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf,
866 u8 event_acknowledge);
867 struct fc_vport *fc_vport_create(struct Scsi_Host *shost, int channel,
868 struct fc_vport_identifiers *);
869 int fc_vport_terminate(struct fc_vport *vport);
870 int fc_block_rport(struct fc_rport *rport);
871 int fc_block_scsi_eh(struct scsi_cmnd *cmnd);
872 enum scsi_timeout_action fc_eh_timed_out(struct scsi_cmnd *scmd);
873 bool fc_eh_should_retry_cmd(struct scsi_cmnd *scmd);
874
fc_bsg_to_shost(struct bsg_job * job)875 static inline struct Scsi_Host *fc_bsg_to_shost(struct bsg_job *job)
876 {
877 if (scsi_is_host_device(job->dev))
878 return dev_to_shost(job->dev);
879 return rport_to_shost(dev_to_rport(job->dev));
880 }
881
fc_bsg_to_rport(struct bsg_job * job)882 static inline struct fc_rport *fc_bsg_to_rport(struct bsg_job *job)
883 {
884 if (scsi_is_fc_rport(job->dev))
885 return dev_to_rport(job->dev);
886 return NULL;
887 }
888
889 #endif /* SCSI_TRANSPORT_FC_H */
890