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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
34struct 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 */
56enum 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 */
72enum 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 */
91enum 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 */
139enum 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) \
166struct 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
181struct 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
219struct 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 */
282struct 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) \
292struct 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
323struct 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
382struct 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 */
405struct 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 */
440enum 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
478struct 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
588struct 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
598struct 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 */
630struct 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 **/
725static inline int
726fc_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
752static 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
760static 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 **/
783static inline void
784fc_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
792struct scsi_transport_template *fc_attach_transport(
793 struct fc_function_template *);
794void fc_release_transport(struct scsi_transport_template *);
795void fc_remove_host(struct Scsi_Host *);
796struct fc_rport *fc_remote_port_add(struct Scsi_Host *shost,
797 int channel, struct fc_rport_identifiers *ids);
798void fc_remote_port_delete(struct fc_rport *rport);
799void fc_remote_port_rolechg(struct fc_rport *rport, u32 roles);
800int scsi_is_fc_rport(const struct device *);
801u32 fc_get_event_number(void);
802void fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
803 enum fc_host_event_code event_code, u32 event_data);
804void 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 */
810struct fc_vport *fc_vport_create(struct Scsi_Host *shost, int channel,
811 struct fc_vport_identifiers *);
812int fc_vport_terminate(struct fc_vport *vport);
813int fc_block_scsi_eh(struct scsi_cmnd *cmnd);
814
815#endif /* SCSI_TRANSPORT_FC_H */
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 <linux/bsg-lib.h>
32#include <asm/unaligned.h>
33#include <scsi/scsi.h>
34#include <scsi/scsi_netlink.h>
35#include <scsi/scsi_host.h>
36
37struct scsi_transport_template;
38
39/*
40 * FC Port definitions - Following FC HBAAPI guidelines
41 *
42 * Note: Not all binary values for the different fields match HBAAPI.
43 * Instead, we use densely packed ordinal values or enums.
44 * We get away with this as we never present the actual binary values
45 * externally. For sysfs, we always present the string that describes
46 * the value. Thus, an admin doesn't need a magic HBAAPI decoder ring
47 * to understand the values. The HBAAPI user-space library is free to
48 * convert the strings into the HBAAPI-specified binary values.
49 *
50 * Note: Not all HBAAPI-defined values are contained in the definitions
51 * below. Those not appropriate to an fc_host (e.g. FCP initiator) have
52 * been removed.
53 */
54
55/*
56 * fc_port_type: If you alter this, you also need to alter scsi_transport_fc.c
57 * (for the ascii descriptions).
58 */
59enum fc_port_type {
60 FC_PORTTYPE_UNKNOWN,
61 FC_PORTTYPE_OTHER,
62 FC_PORTTYPE_NOTPRESENT,
63 FC_PORTTYPE_NPORT, /* Attached to FPort */
64 FC_PORTTYPE_NLPORT, /* (Public) Loop w/ FLPort */
65 FC_PORTTYPE_LPORT, /* (Private) Loop w/o FLPort */
66 FC_PORTTYPE_PTP, /* Point to Point w/ another NPort */
67 FC_PORTTYPE_NPIV, /* VPORT based on NPIV */
68};
69
70
71/*
72 * fc_port_state: If you alter this, you also need to alter scsi_transport_fc.c
73 * (for the ascii descriptions).
74 */
75enum fc_port_state {
76 FC_PORTSTATE_UNKNOWN,
77 FC_PORTSTATE_NOTPRESENT,
78 FC_PORTSTATE_ONLINE,
79 FC_PORTSTATE_OFFLINE, /* User has taken Port Offline */
80 FC_PORTSTATE_BLOCKED,
81 FC_PORTSTATE_BYPASSED,
82 FC_PORTSTATE_DIAGNOSTICS,
83 FC_PORTSTATE_LINKDOWN,
84 FC_PORTSTATE_ERROR,
85 FC_PORTSTATE_LOOPBACK,
86 FC_PORTSTATE_DELETED,
87};
88
89
90/*
91 * fc_vport_state: If you alter this, you also need to alter
92 * scsi_transport_fc.c (for the ascii descriptions).
93 */
94enum fc_vport_state {
95 FC_VPORT_UNKNOWN,
96 FC_VPORT_ACTIVE,
97 FC_VPORT_DISABLED,
98 FC_VPORT_LINKDOWN,
99 FC_VPORT_INITIALIZING,
100 FC_VPORT_NO_FABRIC_SUPP,
101 FC_VPORT_NO_FABRIC_RSCS,
102 FC_VPORT_FABRIC_LOGOUT,
103 FC_VPORT_FABRIC_REJ_WWN,
104 FC_VPORT_FAILED,
105};
106
107
108
109/*
110 * FC Classes of Service
111 * Note: values are not enumerated, as they can be "or'd" together
112 * for reporting (e.g. report supported_classes). If you alter this list,
113 * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
114 */
115#define FC_COS_UNSPECIFIED 0
116#define FC_COS_CLASS1 2
117#define FC_COS_CLASS2 4
118#define FC_COS_CLASS3 8
119#define FC_COS_CLASS4 0x10
120#define FC_COS_CLASS6 0x40
121
122/*
123 * FC Port Speeds
124 * Note: values are not enumerated, as they can be "or'd" together
125 * for reporting (e.g. report supported_speeds). If you alter this list,
126 * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
127 */
128#define FC_PORTSPEED_UNKNOWN 0 /* Unknown - transceiver
129 incapable of reporting */
130#define FC_PORTSPEED_1GBIT 1
131#define FC_PORTSPEED_2GBIT 2
132#define FC_PORTSPEED_10GBIT 4
133#define FC_PORTSPEED_4GBIT 8
134#define FC_PORTSPEED_8GBIT 0x10
135#define FC_PORTSPEED_16GBIT 0x20
136#define FC_PORTSPEED_32GBIT 0x40
137#define FC_PORTSPEED_20GBIT 0x80
138#define FC_PORTSPEED_40GBIT 0x100
139#define FC_PORTSPEED_50GBIT 0x200
140#define FC_PORTSPEED_100GBIT 0x400
141#define FC_PORTSPEED_25GBIT 0x800
142#define FC_PORTSPEED_NOT_NEGOTIATED (1 << 15) /* Speed not established */
143
144/*
145 * fc_tgtid_binding_type: If you alter this, you also need to alter
146 * scsi_transport_fc.c (for the ascii descriptions).
147 */
148enum fc_tgtid_binding_type {
149 FC_TGTID_BIND_NONE,
150 FC_TGTID_BIND_BY_WWPN,
151 FC_TGTID_BIND_BY_WWNN,
152 FC_TGTID_BIND_BY_ID,
153};
154
155/*
156 * FC Port Roles
157 * Note: values are not enumerated, as they can be "or'd" together
158 * for reporting (e.g. report roles). If you alter this list,
159 * you also need to alter scsi_transport_fc.c (for the ascii descriptions).
160 */
161#define FC_PORT_ROLE_UNKNOWN 0x00
162#define FC_PORT_ROLE_FCP_TARGET 0x01
163#define FC_PORT_ROLE_FCP_INITIATOR 0x02
164#define FC_PORT_ROLE_IP_PORT 0x04
165
166/* The following are for compatibility */
167#define FC_RPORT_ROLE_UNKNOWN FC_PORT_ROLE_UNKNOWN
168#define FC_RPORT_ROLE_FCP_TARGET FC_PORT_ROLE_FCP_TARGET
169#define FC_RPORT_ROLE_FCP_INITIATOR FC_PORT_ROLE_FCP_INITIATOR
170#define FC_RPORT_ROLE_IP_PORT FC_PORT_ROLE_IP_PORT
171
172
173/* Macro for use in defining Virtual Port attributes */
174#define FC_VPORT_ATTR(_name,_mode,_show,_store) \
175struct device_attribute dev_attr_vport_##_name = \
176 __ATTR(_name,_mode,_show,_store)
177
178/*
179 * fc_vport_identifiers: This set of data contains all elements
180 * to uniquely identify and instantiate a FC virtual port.
181 *
182 * Notes:
183 * symbolic_name: The driver is to append the symbolic_name string data
184 * to the symbolic_node_name data that it generates by default.
185 * the resulting combination should then be registered with the switch.
186 * It is expected that things like Xen may stuff a VM title into
187 * this field.
188 */
189#define FC_VPORT_SYMBOLIC_NAMELEN 64
190struct fc_vport_identifiers {
191 u64 node_name;
192 u64 port_name;
193 u32 roles;
194 bool disable;
195 enum fc_port_type vport_type; /* only FC_PORTTYPE_NPIV allowed */
196 char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN];
197};
198
199/*
200 * FC Virtual Port Attributes
201 *
202 * This structure exists for each FC port is a virtual FC port. Virtual
203 * ports share the physical link with the Physical port. Each virtual
204 * ports has a unique presence on the SAN, and may be instantiated via
205 * NPIV, Virtual Fabrics, or via additional ALPAs. As the vport is a
206 * unique presence, each vport has it's own view of the fabric,
207 * authentication privilege, and priorities.
208 *
209 * A virtual port may support 1 or more FC4 roles. Typically it is a
210 * FCP Initiator. It could be a FCP Target, or exist sole for an IP over FC
211 * roles. FC port attributes for the vport will be reported on any
212 * fc_host class object allocated for an FCP Initiator.
213 *
214 * --
215 *
216 * Fixed attributes are not expected to change. The driver is
217 * expected to set these values after receiving the fc_vport structure
218 * via the vport_create() call from the transport.
219 * The transport fully manages all get functions w/o driver interaction.
220 *
221 * Dynamic attributes are expected to change. The driver participates
222 * in all get/set operations via functions provided by the driver.
223 *
224 * Private attributes are transport-managed values. They are fully
225 * managed by the transport w/o driver interaction.
226 */
227
228struct fc_vport {
229 /* Fixed Attributes */
230
231 /* Dynamic Attributes */
232
233 /* Private (Transport-managed) Attributes */
234 enum fc_vport_state vport_state;
235 enum fc_vport_state vport_last_state;
236 u64 node_name;
237 u64 port_name;
238 u32 roles;
239 u32 vport_id; /* Admin Identifier for the vport */
240 enum fc_port_type vport_type;
241 char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN];
242
243 /* exported data */
244 void *dd_data; /* Used for driver-specific storage */
245
246 /* internal data */
247 struct Scsi_Host *shost; /* Physical Port Parent */
248 unsigned int channel;
249 u32 number;
250 u8 flags;
251 struct list_head peers;
252 struct device dev;
253 struct work_struct vport_delete_work;
254} __attribute__((aligned(sizeof(unsigned long))));
255
256/* bit field values for struct fc_vport "flags" field: */
257#define FC_VPORT_CREATING 0x01
258#define FC_VPORT_DELETING 0x02
259#define FC_VPORT_DELETED 0x04
260#define FC_VPORT_DEL 0x06 /* Any DELETE state */
261
262#define dev_to_vport(d) \
263 container_of(d, struct fc_vport, dev)
264#define transport_class_to_vport(dev) \
265 dev_to_vport(dev->parent)
266#define vport_to_shost(v) \
267 (v->shost)
268#define vport_to_shost_channel(v) \
269 (v->channel)
270#define vport_to_parent(v) \
271 (v->dev.parent)
272
273
274/* Error return codes for vport_create() callback */
275#define VPCERR_UNSUPPORTED -ENOSYS /* no driver/adapter
276 support */
277#define VPCERR_BAD_WWN -ENOTUNIQ /* driver validation
278 of WWNs failed */
279#define VPCERR_NO_FABRIC_SUPP -EOPNOTSUPP /* Fabric connection
280 is loop or the
281 Fabric Port does
282 not support NPIV */
283
284/*
285 * fc_rport_identifiers: This set of data contains all elements
286 * to uniquely identify a remote FC port. The driver uses this data
287 * to report the existence of a remote FC port in the topology. Internally,
288 * the transport uses this data for attributes and to manage consistent
289 * target id bindings.
290 */
291struct fc_rport_identifiers {
292 u64 node_name;
293 u64 port_name;
294 u32 port_id;
295 u32 roles;
296};
297
298
299/* Macro for use in defining Remote Port attributes */
300#define FC_RPORT_ATTR(_name,_mode,_show,_store) \
301struct device_attribute dev_attr_rport_##_name = \
302 __ATTR(_name,_mode,_show,_store)
303
304
305/*
306 * FC Remote Port Attributes
307 *
308 * This structure exists for each remote FC port that a LLDD notifies
309 * the subsystem of. A remote FC port may or may not be a SCSI Target,
310 * also be a SCSI initiator, IP endpoint, etc. As such, the remote
311 * port is considered a separate entity, independent of "role" (such
312 * as scsi target).
313 *
314 * --
315 *
316 * Attributes are based on HBAAPI V2.0 definitions. Only those
317 * attributes that are determinable by the local port (aka Host)
318 * are contained.
319 *
320 * Fixed attributes are not expected to change. The driver is
321 * expected to set these values after successfully calling
322 * fc_remote_port_add(). The transport fully manages all get functions
323 * w/o driver interaction.
324 *
325 * Dynamic attributes are expected to change. The driver participates
326 * in all get/set operations via functions provided by the driver.
327 *
328 * Private attributes are transport-managed values. They are fully
329 * managed by the transport w/o driver interaction.
330 */
331
332struct fc_rport { /* aka fc_starget_attrs */
333 /* Fixed Attributes */
334 u32 maxframe_size;
335 u32 supported_classes;
336
337 /* Dynamic Attributes */
338 u32 dev_loss_tmo; /* Remote Port loss timeout in seconds. */
339
340 /* Private (Transport-managed) Attributes */
341 u64 node_name;
342 u64 port_name;
343 u32 port_id;
344 u32 roles;
345 enum fc_port_state port_state; /* Will only be ONLINE or UNKNOWN */
346 u32 scsi_target_id;
347 u32 fast_io_fail_tmo;
348
349 /* exported data */
350 void *dd_data; /* Used for driver-specific storage */
351
352 /* internal data */
353 unsigned int channel;
354 u32 number;
355 u8 flags;
356 struct list_head peers;
357 struct device dev;
358 struct delayed_work dev_loss_work;
359 struct work_struct scan_work;
360 struct delayed_work fail_io_work;
361 struct work_struct stgt_delete_work;
362 struct work_struct rport_delete_work;
363 struct request_queue *rqst_q; /* bsg support */
364} __attribute__((aligned(sizeof(unsigned long))));
365
366/* bit field values for struct fc_rport "flags" field: */
367#define FC_RPORT_DEVLOSS_PENDING 0x01
368#define FC_RPORT_SCAN_PENDING 0x02
369#define FC_RPORT_FAST_FAIL_TIMEDOUT 0x04
370#define FC_RPORT_DEVLOSS_CALLBK_DONE 0x08
371
372#define dev_to_rport(d) \
373 container_of(d, struct fc_rport, dev)
374#define transport_class_to_rport(dev) \
375 dev_to_rport(dev->parent)
376#define rport_to_shost(r) \
377 dev_to_shost(r->dev.parent)
378
379/*
380 * FC SCSI Target Attributes
381 *
382 * The SCSI Target is considered an extension of a remote port (as
383 * a remote port can be more than a SCSI Target). Within the scsi
384 * subsystem, we leave the Target as a separate entity. Doing so
385 * provides backward compatibility with prior FC transport api's,
386 * and lets remote ports be handled entirely within the FC transport
387 * and independently from the scsi subsystem. The drawback is that
388 * some data will be duplicated.
389 */
390
391struct fc_starget_attrs { /* aka fc_target_attrs */
392 /* Dynamic Attributes */
393 u64 node_name;
394 u64 port_name;
395 u32 port_id;
396};
397
398#define fc_starget_node_name(x) \
399 (((struct fc_starget_attrs *)&(x)->starget_data)->node_name)
400#define fc_starget_port_name(x) \
401 (((struct fc_starget_attrs *)&(x)->starget_data)->port_name)
402#define fc_starget_port_id(x) \
403 (((struct fc_starget_attrs *)&(x)->starget_data)->port_id)
404
405#define starget_to_rport(s) \
406 scsi_is_fc_rport(s->dev.parent) ? dev_to_rport(s->dev.parent) : NULL
407
408
409/*
410 * FC Local Port (Host) Statistics
411 */
412
413/* FC Statistics - Following FC HBAAPI v2.0 guidelines */
414struct fc_host_statistics {
415 /* port statistics */
416 u64 seconds_since_last_reset;
417 u64 tx_frames;
418 u64 tx_words;
419 u64 rx_frames;
420 u64 rx_words;
421 u64 lip_count;
422 u64 nos_count;
423 u64 error_frames;
424 u64 dumped_frames;
425 u64 link_failure_count;
426 u64 loss_of_sync_count;
427 u64 loss_of_signal_count;
428 u64 prim_seq_protocol_err_count;
429 u64 invalid_tx_word_count;
430 u64 invalid_crc_count;
431
432 /* fc4 statistics (only FCP supported currently) */
433 u64 fcp_input_requests;
434 u64 fcp_output_requests;
435 u64 fcp_control_requests;
436 u64 fcp_input_megabytes;
437 u64 fcp_output_megabytes;
438 u64 fcp_packet_alloc_failures; /* fcp packet allocation failures */
439 u64 fcp_packet_aborts; /* fcp packet aborted */
440 u64 fcp_frame_alloc_failures; /* fcp frame allocation failures */
441
442 /* fc exches statistics */
443 u64 fc_no_free_exch; /* no free exch memory */
444 u64 fc_no_free_exch_xid; /* no free exch id */
445 u64 fc_xid_not_found; /* exch not found for a response */
446 u64 fc_xid_busy; /* exch exist for new a request */
447 u64 fc_seq_not_found; /* seq is not found for exchange */
448 u64 fc_non_bls_resp; /* a non BLS response frame with
449 a sequence responder in new exch */
450};
451
452
453/*
454 * FC Event Codes - Polled and Async, following FC HBAAPI v2.0 guidelines
455 */
456
457/*
458 * fc_host_event_code: If you alter this, you also need to alter
459 * scsi_transport_fc.c (for the ascii descriptions).
460 */
461enum fc_host_event_code {
462 FCH_EVT_LIP = 0x1,
463 FCH_EVT_LINKUP = 0x2,
464 FCH_EVT_LINKDOWN = 0x3,
465 FCH_EVT_LIPRESET = 0x4,
466 FCH_EVT_RSCN = 0x5,
467 FCH_EVT_ADAPTER_CHANGE = 0x103,
468 FCH_EVT_PORT_UNKNOWN = 0x200,
469 FCH_EVT_PORT_OFFLINE = 0x201,
470 FCH_EVT_PORT_ONLINE = 0x202,
471 FCH_EVT_PORT_FABRIC = 0x204,
472 FCH_EVT_LINK_UNKNOWN = 0x500,
473 FCH_EVT_VENDOR_UNIQUE = 0xffff,
474};
475
476
477/*
478 * FC Local Port (Host) Attributes
479 *
480 * Attributes are based on HBAAPI V2.0 definitions.
481 * Note: OSDeviceName is determined by user-space library
482 *
483 * Fixed attributes are not expected to change. The driver is
484 * expected to set these values after successfully calling scsi_add_host().
485 * The transport fully manages all get functions w/o driver interaction.
486 *
487 * Dynamic attributes are expected to change. The driver participates
488 * in all get/set operations via functions provided by the driver.
489 *
490 * Private attributes are transport-managed values. They are fully
491 * managed by the transport w/o driver interaction.
492 */
493
494#define FC_FC4_LIST_SIZE 32
495#define FC_SYMBOLIC_NAME_SIZE 256
496#define FC_VERSION_STRING_SIZE 64
497#define FC_SERIAL_NUMBER_SIZE 80
498
499struct fc_host_attrs {
500 /* Fixed Attributes */
501 u64 node_name;
502 u64 port_name;
503 u64 permanent_port_name;
504 u32 supported_classes;
505 u8 supported_fc4s[FC_FC4_LIST_SIZE];
506 u32 supported_speeds;
507 u32 maxframe_size;
508 u16 max_npiv_vports;
509 char serial_number[FC_SERIAL_NUMBER_SIZE];
510 char manufacturer[FC_SERIAL_NUMBER_SIZE];
511 char model[FC_SYMBOLIC_NAME_SIZE];
512 char model_description[FC_SYMBOLIC_NAME_SIZE];
513 char hardware_version[FC_VERSION_STRING_SIZE];
514 char driver_version[FC_VERSION_STRING_SIZE];
515 char firmware_version[FC_VERSION_STRING_SIZE];
516 char optionrom_version[FC_VERSION_STRING_SIZE];
517
518 /* Dynamic Attributes */
519 u32 port_id;
520 enum fc_port_type port_type;
521 enum fc_port_state port_state;
522 u8 active_fc4s[FC_FC4_LIST_SIZE];
523 u32 speed;
524 u64 fabric_name;
525 char symbolic_name[FC_SYMBOLIC_NAME_SIZE];
526 char system_hostname[FC_SYMBOLIC_NAME_SIZE];
527 u32 dev_loss_tmo;
528
529 /* Private (Transport-managed) Attributes */
530 enum fc_tgtid_binding_type tgtid_bind_type;
531
532 /* internal data */
533 struct list_head rports;
534 struct list_head rport_bindings;
535 struct list_head vports;
536 u32 next_rport_number;
537 u32 next_target_id;
538 u32 next_vport_number;
539 u16 npiv_vports_inuse;
540
541 /* work queues for rport state manipulation */
542 char work_q_name[20];
543 struct workqueue_struct *work_q;
544 char devloss_work_q_name[20];
545 struct workqueue_struct *devloss_work_q;
546
547 /* bsg support */
548 struct request_queue *rqst_q;
549};
550
551#define shost_to_fc_host(x) \
552 ((struct fc_host_attrs *)(x)->shost_data)
553
554#define fc_host_node_name(x) \
555 (((struct fc_host_attrs *)(x)->shost_data)->node_name)
556#define fc_host_port_name(x) \
557 (((struct fc_host_attrs *)(x)->shost_data)->port_name)
558#define fc_host_permanent_port_name(x) \
559 (((struct fc_host_attrs *)(x)->shost_data)->permanent_port_name)
560#define fc_host_supported_classes(x) \
561 (((struct fc_host_attrs *)(x)->shost_data)->supported_classes)
562#define fc_host_supported_fc4s(x) \
563 (((struct fc_host_attrs *)(x)->shost_data)->supported_fc4s)
564#define fc_host_supported_speeds(x) \
565 (((struct fc_host_attrs *)(x)->shost_data)->supported_speeds)
566#define fc_host_maxframe_size(x) \
567 (((struct fc_host_attrs *)(x)->shost_data)->maxframe_size)
568#define fc_host_max_npiv_vports(x) \
569 (((struct fc_host_attrs *)(x)->shost_data)->max_npiv_vports)
570#define fc_host_serial_number(x) \
571 (((struct fc_host_attrs *)(x)->shost_data)->serial_number)
572#define fc_host_manufacturer(x) \
573 (((struct fc_host_attrs *)(x)->shost_data)->manufacturer)
574#define fc_host_model(x) \
575 (((struct fc_host_attrs *)(x)->shost_data)->model)
576#define fc_host_model_description(x) \
577 (((struct fc_host_attrs *)(x)->shost_data)->model_description)
578#define fc_host_hardware_version(x) \
579 (((struct fc_host_attrs *)(x)->shost_data)->hardware_version)
580#define fc_host_driver_version(x) \
581 (((struct fc_host_attrs *)(x)->shost_data)->driver_version)
582#define fc_host_firmware_version(x) \
583 (((struct fc_host_attrs *)(x)->shost_data)->firmware_version)
584#define fc_host_optionrom_version(x) \
585 (((struct fc_host_attrs *)(x)->shost_data)->optionrom_version)
586#define fc_host_port_id(x) \
587 (((struct fc_host_attrs *)(x)->shost_data)->port_id)
588#define fc_host_port_type(x) \
589 (((struct fc_host_attrs *)(x)->shost_data)->port_type)
590#define fc_host_port_state(x) \
591 (((struct fc_host_attrs *)(x)->shost_data)->port_state)
592#define fc_host_active_fc4s(x) \
593 (((struct fc_host_attrs *)(x)->shost_data)->active_fc4s)
594#define fc_host_speed(x) \
595 (((struct fc_host_attrs *)(x)->shost_data)->speed)
596#define fc_host_fabric_name(x) \
597 (((struct fc_host_attrs *)(x)->shost_data)->fabric_name)
598#define fc_host_symbolic_name(x) \
599 (((struct fc_host_attrs *)(x)->shost_data)->symbolic_name)
600#define fc_host_system_hostname(x) \
601 (((struct fc_host_attrs *)(x)->shost_data)->system_hostname)
602#define fc_host_tgtid_bind_type(x) \
603 (((struct fc_host_attrs *)(x)->shost_data)->tgtid_bind_type)
604#define fc_host_rports(x) \
605 (((struct fc_host_attrs *)(x)->shost_data)->rports)
606#define fc_host_rport_bindings(x) \
607 (((struct fc_host_attrs *)(x)->shost_data)->rport_bindings)
608#define fc_host_vports(x) \
609 (((struct fc_host_attrs *)(x)->shost_data)->vports)
610#define fc_host_next_rport_number(x) \
611 (((struct fc_host_attrs *)(x)->shost_data)->next_rport_number)
612#define fc_host_next_target_id(x) \
613 (((struct fc_host_attrs *)(x)->shost_data)->next_target_id)
614#define fc_host_next_vport_number(x) \
615 (((struct fc_host_attrs *)(x)->shost_data)->next_vport_number)
616#define fc_host_npiv_vports_inuse(x) \
617 (((struct fc_host_attrs *)(x)->shost_data)->npiv_vports_inuse)
618#define fc_host_work_q_name(x) \
619 (((struct fc_host_attrs *)(x)->shost_data)->work_q_name)
620#define fc_host_work_q(x) \
621 (((struct fc_host_attrs *)(x)->shost_data)->work_q)
622#define fc_host_devloss_work_q_name(x) \
623 (((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q_name)
624#define fc_host_devloss_work_q(x) \
625 (((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q)
626#define fc_host_dev_loss_tmo(x) \
627 (((struct fc_host_attrs *)(x)->shost_data)->dev_loss_tmo)
628
629/* The functions by which the transport class and the driver communicate */
630struct 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 bsg_job *);
666 int (*bsg_timeout)(struct 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 unsigned long show_host_manufacturer:1;
704 unsigned long show_host_model:1;
705 unsigned long show_host_model_description:1;
706 unsigned long show_host_hardware_version:1;
707 unsigned long show_host_driver_version:1;
708 unsigned long show_host_firmware_version:1;
709 unsigned long show_host_optionrom_version:1;
710 /* host dynamic attributes */
711 unsigned long show_host_port_id:1;
712 unsigned long show_host_port_type:1;
713 unsigned long show_host_port_state:1;
714 unsigned long show_host_active_fc4s:1;
715 unsigned long show_host_speed:1;
716 unsigned long show_host_fabric_name:1;
717 unsigned long show_host_symbolic_name:1;
718 unsigned long show_host_system_hostname:1;
719
720 unsigned long disable_target_scan:1;
721};
722
723
724/**
725 * fc_remote_port_chkready - called to validate the remote port state
726 * prior to initiating io to the port.
727 *
728 * Returns a scsi result code that can be returned by the LLDD.
729 *
730 * @rport: remote port to be checked
731 **/
732static inline int
733fc_remote_port_chkready(struct fc_rport *rport)
734{
735 int result;
736
737 switch (rport->port_state) {
738 case FC_PORTSTATE_ONLINE:
739 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
740 result = 0;
741 else if (rport->flags & FC_RPORT_DEVLOSS_PENDING)
742 result = DID_IMM_RETRY << 16;
743 else
744 result = DID_NO_CONNECT << 16;
745 break;
746 case FC_PORTSTATE_BLOCKED:
747 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
748 result = DID_TRANSPORT_FAILFAST << 16;
749 else
750 result = DID_IMM_RETRY << 16;
751 break;
752 default:
753 result = DID_NO_CONNECT << 16;
754 break;
755 }
756 return result;
757}
758
759static inline u64 wwn_to_u64(u8 *wwn)
760{
761 return get_unaligned_be64(wwn);
762}
763
764static inline void u64_to_wwn(u64 inm, u8 *wwn)
765{
766 put_unaligned_be64(inm, wwn);
767}
768
769/**
770 * fc_vport_set_state() - called to set a vport's state. Saves the old state,
771 * excepting the transitory states of initializing and sending the ELS
772 * traffic to instantiate the vport on the link.
773 *
774 * Assumes the driver has surrounded this with the proper locking to ensure
775 * a coherent state change.
776 *
777 * @vport: virtual port whose state is changing
778 * @new_state: new state
779 **/
780static inline void
781fc_vport_set_state(struct fc_vport *vport, enum fc_vport_state new_state)
782{
783 if ((new_state != FC_VPORT_UNKNOWN) &&
784 (new_state != FC_VPORT_INITIALIZING))
785 vport->vport_last_state = vport->vport_state;
786 vport->vport_state = new_state;
787}
788
789struct scsi_transport_template *fc_attach_transport(
790 struct fc_function_template *);
791void fc_release_transport(struct scsi_transport_template *);
792void fc_remove_host(struct Scsi_Host *);
793struct fc_rport *fc_remote_port_add(struct Scsi_Host *shost,
794 int channel, struct fc_rport_identifiers *ids);
795void fc_remote_port_delete(struct fc_rport *rport);
796void fc_remote_port_rolechg(struct fc_rport *rport, u32 roles);
797int scsi_is_fc_rport(const struct device *);
798u32 fc_get_event_number(void);
799void fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
800 enum fc_host_event_code event_code, u32 event_data);
801void fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
802 u32 data_len, char * data_buf, u64 vendor_id);
803 /* Note: when specifying vendor_id to fc_host_post_vendor_event()
804 * be sure to read the Vendor Type and ID formatting requirements
805 * specified in scsi_netlink.h
806 */
807struct fc_vport *fc_vport_create(struct Scsi_Host *shost, int channel,
808 struct fc_vport_identifiers *);
809int fc_vport_terminate(struct fc_vport *vport);
810int fc_block_scsi_eh(struct scsi_cmnd *cmnd);
811
812static inline struct Scsi_Host *fc_bsg_to_shost(struct bsg_job *job)
813{
814 if (scsi_is_host_device(job->dev))
815 return dev_to_shost(job->dev);
816 return rport_to_shost(dev_to_rport(job->dev));
817}
818
819static inline struct fc_rport *fc_bsg_to_rport(struct bsg_job *job)
820{
821 if (scsi_is_fc_rport(job->dev))
822 return dev_to_rport(job->dev);
823 return NULL;
824}
825
826#endif /* SCSI_TRANSPORT_FC_H */