summaryrefslogtreecommitdiff
path: root/drivers/scsi/ibmvscsi/ibmvfc.h
blob: fb3177ab66918382c878fc0289c8bbf4cce9ff95 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
/*
 * ibmvfc.h -- driver for IBM Power Virtual Fibre Channel Adapter
 *
 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
 *
 * Copyright (C) IBM Corporation, 2008
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#ifndef _IBMVFC_H
#define _IBMVFC_H

#include <linux/list.h>
#include <linux/types.h>
#include "viosrp.h"

#define IBMVFC_NAME	"ibmvfc"
#define IBMVFC_DRIVER_VERSION		"1.0.2"
#define IBMVFC_DRIVER_DATE		"(August 14, 2008)"

#define IBMVFC_DEFAULT_TIMEOUT	15
#define IBMVFC_INIT_TIMEOUT		30
#define IBMVFC_MAX_REQUESTS_DEFAULT	100

#define IBMVFC_DEBUG			0
#define IBMVFC_MAX_TARGETS		1024
#define IBMVFC_MAX_LUN			0xffffffff
#define IBMVFC_MAX_SECTORS		0xffffu
#define IBMVFC_MAX_DISC_THREADS	4
#define IBMVFC_TGT_MEMPOOL_SZ		64
#define IBMVFC_MAX_CMDS_PER_LUN	64
#define IBMVFC_MAX_INIT_RETRIES	3
#define IBMVFC_DEV_LOSS_TMO		(5 * 60)
#define IBMVFC_DEFAULT_LOG_LEVEL	2
#define IBMVFC_MAX_CDB_LEN		16

/*
 * Ensure we have resources for ERP and initialization:
 * 1 for ERP
 * 1 for initialization
 * 1 for each discovery thread
 */
#define IBMVFC_NUM_INTERNAL_REQ	(1 + 1 + disc_threads)

#define IBMVFC_MAD_SUCCESS		0x00
#define IBMVFC_MAD_NOT_SUPPORTED	0xF1
#define IBMVFC_MAD_FAILED		0xF7
#define IBMVFC_MAD_DRIVER_FAILED	0xEE
#define IBMVFC_MAD_CRQ_ERROR		0xEF

enum ibmvfc_crq_valid {
	IBMVFC_CRQ_CMD_RSP		= 0x80,
	IBMVFC_CRQ_INIT_RSP		= 0xC0,
	IBMVFC_CRQ_XPORT_EVENT		= 0xFF,
};

enum ibmvfc_crq_format {
	IBMVFC_CRQ_INIT			= 0x01,
	IBMVFC_CRQ_INIT_COMPLETE	= 0x02,
	IBMVFC_PARTITION_MIGRATED	= 0x06,
};

enum ibmvfc_cmd_status_flags {
	IBMVFC_FABRIC_MAPPED		= 0x0001,
	IBMVFC_VIOS_FAILURE		= 0x0002,
	IBMVFC_FC_FAILURE			= 0x0004,
	IBMVFC_FC_SCSI_ERROR		= 0x0008,
	IBMVFC_HW_EVENT_LOGGED		= 0x0010,
	IBMVFC_VIOS_LOGGED		= 0x0020,
};

enum ibmvfc_fabric_mapped_errors {
	IBMVFC_UNABLE_TO_ESTABLISH	= 0x0001,
	IBMVFC_XPORT_FAULT		= 0x0002,
	IBMVFC_CMD_TIMEOUT		= 0x0003,
	IBMVFC_ENETDOWN			= 0x0004,
	IBMVFC_HW_FAILURE			= 0x0005,
	IBMVFC_LINK_DOWN_ERR		= 0x0006,
	IBMVFC_LINK_DEAD_ERR		= 0x0007,
	IBMVFC_UNABLE_TO_REGISTER	= 0x0008,
	IBMVFC_XPORT_BUSY			= 0x000A,
	IBMVFC_XPORT_DEAD			= 0x000B,
	IBMVFC_CONFIG_ERROR		= 0x000C,
	IBMVFC_NAME_SERVER_FAIL		= 0x000D,
	IBMVFC_LINK_HALTED		= 0x000E,
	IBMVFC_XPORT_GENERAL		= 0x8000,
};

enum ibmvfc_vios_errors {
	IBMVFC_CRQ_FAILURE			= 0x0001,
	IBMVFC_SW_FAILURE				= 0x0002,
	IBMVFC_INVALID_PARAMETER		= 0x0003,
	IBMVFC_MISSING_PARAMETER		= 0x0004,
	IBMVFC_HOST_IO_BUS			= 0x0005,
	IBMVFC_TRANS_CANCELLED			= 0x0006,
	IBMVFC_TRANS_CANCELLED_IMPLICIT	= 0x0007,
	IBMVFC_INSUFFICIENT_RESOURCE		= 0x0008,
	IBMVFC_COMMAND_FAILED			= 0x8000,
};

enum ibmvfc_mad_types {
	IBMVFC_NPIV_LOGIN		= 0x0001,
	IBMVFC_DISC_TARGETS	= 0x0002,
	IBMVFC_PORT_LOGIN		= 0x0004,
	IBMVFC_PROCESS_LOGIN	= 0x0008,
	IBMVFC_QUERY_TARGET	= 0x0010,
	IBMVFC_IMPLICIT_LOGOUT	= 0x0040,
	IBMVFC_PASSTHRU		= 0x0200,
	IBMVFC_TMF_MAD		= 0x0100,
};

struct ibmvfc_mad_common {
	u32 version;
	u32 reserved;
	u32 opcode;
	u16 status;
	u16 length;
	u64 tag;
}__attribute__((packed, aligned (8)));

struct ibmvfc_npiv_login_mad {
	struct ibmvfc_mad_common common;
	struct srp_direct_buf buffer;
}__attribute__((packed, aligned (8)));

#define IBMVFC_MAX_NAME 256

struct ibmvfc_npiv_login {
	u32 ostype;
#define IBMVFC_OS_LINUX	0x02
	u32 pad;
	u64 max_dma_len;
	u32 max_payload;
	u32 max_response;
	u32 partition_num;
	u32 vfc_frame_version;
	u16 fcp_version;
	u16 flags;
#define IBMVFC_CLIENT_MIGRATED	0x01
#define IBMVFC_FLUSH_ON_HALT		0x02
	u32 max_cmds;
	u64 capabilities;
#define IBMVFC_CAN_MIGRATE		0x01
	u64 node_name;
	struct srp_direct_buf async;
	u8 partition_name[IBMVFC_MAX_NAME];
	u8 device_name[IBMVFC_MAX_NAME];
	u8 drc_name[IBMVFC_MAX_NAME];
	u64 reserved2[2];
}__attribute__((packed, aligned (8)));

struct ibmvfc_common_svc_parms {
	u16 fcph_version;
	u16 b2b_credit;
	u16 features;
	u16 bb_rcv_sz; /* upper nibble is BB_SC_N */
	u32 ratov;
	u32 edtov;
}__attribute__((packed, aligned (4)));

struct ibmvfc_service_parms {
	struct ibmvfc_common_svc_parms common;
	u8 port_name[8];
	u8 node_name[8];
	u32 class1_parms[4];
	u32 class2_parms[4];
	u32 class3_parms[4];
	u32 obsolete[4];
	u32 vendor_version[4];
	u32 services_avail[2];
	u32 ext_len;
	u32 reserved[30];
	u32 clk_sync_qos[2];
}__attribute__((packed, aligned (4)));

struct ibmvfc_npiv_login_resp {
	u32 version;
	u16 status;
	u16 error;
	u32 flags;
#define IBMVFC_NATIVE_FC		0x01
#define IBMVFC_CAN_FLUSH_ON_HALT	0x08
	u32 reserved;
	u64 capabilites;
	u32 max_cmds;
	u32 scsi_id_sz;
	u64 max_dma_len;
	u64 scsi_id;
	u64 port_name;
	u64 node_name;
	u64 link_speed;
	u8 partition_name[IBMVFC_MAX_NAME];
	u8 device_name[IBMVFC_MAX_NAME];
	u8 port_loc_code[IBMVFC_MAX_NAME];
	u8 drc_name[IBMVFC_MAX_NAME];
	struct ibmvfc_service_parms service_parms;
	u64 reserved2;
}__attribute__((packed, aligned (8)));

union ibmvfc_npiv_login_data {
	struct ibmvfc_npiv_login login;
	struct ibmvfc_npiv_login_resp resp;
}__attribute__((packed, aligned (8)));

struct ibmvfc_discover_targets_buf {
	u32 scsi_id[1];
#define IBMVFC_DISC_TGT_SCSI_ID_MASK	0x00ffffff
};

struct ibmvfc_discover_targets {
	struct ibmvfc_mad_common common;
	struct srp_direct_buf buffer;
	u32 flags;
	u16 status;
	u16 error;
	u32 bufflen;
	u32 num_avail;
	u32 num_written;
	u64 reserved[2];
}__attribute__((packed, aligned (8)));

enum ibmvfc_fc_reason {
	IBMVFC_INVALID_ELS_CMD_CODE	= 0x01,
	IBMVFC_INVALID_VERSION		= 0x02,
	IBMVFC_LOGICAL_ERROR		= 0x03,
	IBMVFC_INVALID_CT_IU_SIZE	= 0x04,
	IBMVFC_LOGICAL_BUSY		= 0x05,
	IBMVFC_PROTOCOL_ERROR		= 0x07,
	IBMVFC_UNABLE_TO_PERFORM_REQ	= 0x09,
	IBMVFC_CMD_NOT_SUPPORTED	= 0x0B,
	IBMVFC_SERVER_NOT_AVAIL		= 0x0D,
	IBMVFC_CMD_IN_PROGRESS		= 0x0E,
	IBMVFC_VENDOR_SPECIFIC		= 0xFF,
};

enum ibmvfc_fc_type {
	IBMVFC_FABRIC_REJECT	= 0x01,
	IBMVFC_PORT_REJECT	= 0x02,
	IBMVFC_LS_REJECT		= 0x03,
	IBMVFC_FABRIC_BUSY	= 0x04,
	IBMVFC_PORT_BUSY		= 0x05,
	IBMVFC_BASIC_REJECT	= 0x06,
};

enum ibmvfc_gs_explain {
	IBMVFC_PORT_NAME_NOT_REG	= 0x02,
};

struct ibmvfc_port_login {
	struct ibmvfc_mad_common common;
	u64 scsi_id;
	u16 reserved;
	u16 fc_service_class;
	u32 blksz;
	u32 hdr_per_blk;
	u16 status;
	u16 error;		/* also fc_reason */
	u16 fc_explain;
	u16 fc_type;
	u32 reserved2;
	struct ibmvfc_service_parms service_parms;
	struct ibmvfc_service_parms service_parms_change;
	u64 reserved3[2];
}__attribute__((packed, aligned (8)));

struct ibmvfc_prli_svc_parms {
	u8 type;
#define IBMVFC_SCSI_FCP_TYPE		0x08
	u8 type_ext;
	u16 flags;
#define IBMVFC_PRLI_ORIG_PA_VALID			0x8000
#define IBMVFC_PRLI_RESP_PA_VALID			0x4000
#define IBMVFC_PRLI_EST_IMG_PAIR			0x2000
	u32 orig_pa;
	u32 resp_pa;
	u32 service_parms;
#define IBMVFC_PRLI_TASK_RETRY			0x00000200
#define IBMVFC_PRLI_RETRY				0x00000100
#define IBMVFC_PRLI_DATA_OVERLAY			0x00000040
#define IBMVFC_PRLI_INITIATOR_FUNC			0x00000020
#define IBMVFC_PRLI_TARGET_FUNC			0x00000010
#define IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED	0x00000002
#define IBMVFC_PRLI_WR_FCP_XFER_RDY_DISABLED	0x00000001
}__attribute__((packed, aligned (4)));

struct ibmvfc_process_login {
	struct ibmvfc_mad_common common;
	u64 scsi_id;
	struct ibmvfc_prli_svc_parms parms;
	u8 reserved[48];
	u16 status;
	u16 error;			/* also fc_reason */
	u32 reserved2;
	u64 reserved3[2];
}__attribute__((packed, aligned (8)));

struct ibmvfc_query_tgt {
	struct ibmvfc_mad_common common;
	u64 wwpn;
	u64 scsi_id;
	u16 status;
	u16 error;
	u16 fc_explain;
	u16 fc_type;
	u64 reserved[2];
}__attribute__((packed, aligned (8)));

struct ibmvfc_implicit_logout {
	struct ibmvfc_mad_common common;
	u64 old_scsi_id;
	u64 reserved[2];
}__attribute__((packed, aligned (8)));

struct ibmvfc_tmf {
	struct ibmvfc_mad_common common;
	u64 scsi_id;
	struct scsi_lun lun;
	u32 flags;
#define IBMVFC_TMF_ABORT_TASK		0x02
#define IBMVFC_TMF_ABORT_TASK_SET	0x04
#define IBMVFC_TMF_LUN_RESET		0x10
#define IBMVFC_TMF_TGT_RESET		0x20
#define IBMVFC_TMF_LUA_VALID		0x40
	u32 cancel_key;
	u32 my_cancel_key;
#define IBMVFC_TMF_CANCEL_KEY		0x80000000
	u32 pad;
	u64 reserved[2];
}__attribute__((packed, aligned (8)));

enum ibmvfc_fcp_rsp_info_codes {
	RSP_NO_FAILURE		= 0x00,
	RSP_TMF_REJECTED		= 0x04,
	RSP_TMF_FAILED		= 0x05,
	RSP_TMF_INVALID_LUN	= 0x09,
};

struct ibmvfc_fcp_rsp_info {
	u16 reserved;
	u8 rsp_code;
	u8 reserved2[4];
}__attribute__((packed, aligned (2)));

enum ibmvfc_fcp_rsp_flags {
	FCP_BIDI_RSP			= 0x80,
	FCP_BIDI_READ_RESID_UNDER	= 0x40,
	FCP_BIDI_READ_RESID_OVER	= 0x20,
	FCP_CONF_REQ			= 0x10,
	FCP_RESID_UNDER			= 0x08,
	FCP_RESID_OVER			= 0x04,
	FCP_SNS_LEN_VALID			= 0x02,
	FCP_RSP_LEN_VALID			= 0x01,
};

union ibmvfc_fcp_rsp_data {
	struct ibmvfc_fcp_rsp_info info;
	u8 sense[SCSI_SENSE_BUFFERSIZE + sizeof(struct ibmvfc_fcp_rsp_info)];
}__attribute__((packed, aligned (8)));

struct ibmvfc_fcp_rsp {
	u64 reserved;
	u16 retry_delay_timer;
	u8 flags;
	u8 scsi_status;
	u32 fcp_resid;
	u32 fcp_sense_len;
	u32 fcp_rsp_len;
	union ibmvfc_fcp_rsp_data data;
}__attribute__((packed, aligned (8)));

enum ibmvfc_cmd_flags {
	IBMVFC_SCATTERLIST	= 0x0001,
	IBMVFC_NO_MEM_DESC	= 0x0002,
	IBMVFC_READ			= 0x0004,
	IBMVFC_WRITE		= 0x0008,
	IBMVFC_TMF			= 0x0080,
	IBMVFC_CLASS_3_ERR	= 0x0100,
};

enum ibmvfc_fc_task_attr {
	IBMVFC_SIMPLE_TASK	= 0x00,
	IBMVFC_HEAD_OF_QUEUE	= 0x01,
	IBMVFC_ORDERED_TASK	= 0x02,
	IBMVFC_ACA_TASK		= 0x04,
};

enum ibmvfc_fc_tmf_flags {
	IBMVFC_ABORT_TASK_SET	= 0x02,
	IBMVFC_LUN_RESET		= 0x10,
	IBMVFC_TARGET_RESET	= 0x20,
};

struct ibmvfc_fcp_cmd_iu {
	struct scsi_lun lun;
	u8 crn;
	u8 pri_task_attr;
	u8 tmf_flags;
	u8 add_cdb_len;
#define IBMVFC_RDDATA		0x02
#define IBMVFC_WRDATA		0x01
	u8 cdb[IBMVFC_MAX_CDB_LEN];
	u32 xfer_len;
}__attribute__((packed, aligned (4)));

struct ibmvfc_cmd {
	u64 task_tag;
	u32 frame_type;
	u32 payload_len;
	u32 resp_len;
	u32 adapter_resid;
	u16 status;
	u16 error;
	u16 flags;
	u16 response_flags;
#define IBMVFC_ADAPTER_RESID_VALID	0x01
	u32 cancel_key;
	u32 exchange_id;
	struct srp_direct_buf ext_func;
	struct srp_direct_buf ioba;
	struct srp_direct_buf resp;
	u64 correlation;
	u64 tgt_scsi_id;
	u64 tag;
	u64 reserved3[2];
	struct ibmvfc_fcp_cmd_iu iu;
	struct ibmvfc_fcp_rsp rsp;
}__attribute__((packed, aligned (8)));

struct ibmvfc_passthru_fc_iu {
	u32 payload[7];
#define IBMVFC_ADISC	0x52000000
	u32 response[7];
};

struct ibmvfc_passthru_iu {
	u64 task_tag;
	u32 cmd_len;
	u32 rsp_len;
	u16 status;
	u16 error;
	u32 flags;
#define IBMVFC_FC_ELS		0x01
	u32 cancel_key;
	u32 reserved;
	struct srp_direct_buf cmd;
	struct srp_direct_buf rsp;
	u64 correlation;
	u64 scsi_id;
	u64 tag;
	u64 reserved2[2];
}__attribute__((packed, aligned (8)));

struct ibmvfc_passthru_mad {
	struct ibmvfc_mad_common common;
	struct srp_direct_buf cmd_ioba;
	struct ibmvfc_passthru_iu iu;
	struct ibmvfc_passthru_fc_iu fc_iu;
}__attribute__((packed, aligned (8)));

struct ibmvfc_trace_start_entry {
	u32 xfer_len;
}__attribute__((packed));

struct ibmvfc_trace_end_entry {
	u16 status;
	u16 error;
	u8 fcp_rsp_flags;
	u8 rsp_code;
	u8 scsi_status;
	u8 reserved;
}__attribute__((packed));

struct ibmvfc_trace_entry {
	struct ibmvfc_event *evt;
	u32 time;
	u32 scsi_id;
	u32 lun;
	u8 fmt;
	u8 op_code;
	u8 tmf_flags;
	u8 type;
#define IBMVFC_TRC_START	0x00
#define IBMVFC_TRC_END		0xff
	union {
		struct ibmvfc_trace_start_entry start;
		struct ibmvfc_trace_end_entry end;
	} u;
}__attribute__((packed, aligned (8)));

enum ibmvfc_crq_formats {
	IBMVFC_CMD_FORMAT		= 0x01,
	IBMVFC_ASYNC_EVENT	= 0x02,
	IBMVFC_MAD_FORMAT		= 0x04,
};

enum ibmvfc_async_event {
	IBMVFC_AE_ELS_PLOGI		= 0x0001,
	IBMVFC_AE_ELS_LOGO		= 0x0002,
	IBMVFC_AE_ELS_PRLO		= 0x0004,
	IBMVFC_AE_SCN_NPORT		= 0x0008,
	IBMVFC_AE_SCN_GROUP		= 0x0010,
	IBMVFC_AE_SCN_DOMAIN		= 0x0020,
	IBMVFC_AE_SCN_FABRIC		= 0x0040,
	IBMVFC_AE_LINK_UP			= 0x0080,
	IBMVFC_AE_LINK_DOWN		= 0x0100,
	IBMVFC_AE_LINK_DEAD		= 0x0200,
	IBMVFC_AE_HALT			= 0x0400,
	IBMVFC_AE_RESUME			= 0x0800,
	IBMVFC_AE_ADAPTER_FAILED	= 0x1000,
};

struct ibmvfc_crq {
	u8 valid;
	u8 format;
	u8 reserved[6];
	u64 ioba;
}__attribute__((packed, aligned (8)));

struct ibmvfc_crq_queue {
	struct ibmvfc_crq *msgs;
	int size, cur;
	dma_addr_t msg_token;
};

struct ibmvfc_async_crq {
	u8 valid;
	u8 pad[3];
	u32 pad2;
	u64 event;
	u64 scsi_id;
	u64 wwpn;
	u64 node_name;
	u64 reserved;
}__attribute__((packed, aligned (8)));

struct ibmvfc_async_crq_queue {
	struct ibmvfc_async_crq *msgs;
	int size, cur;
	dma_addr_t msg_token;
};

union ibmvfc_iu {
	struct ibmvfc_mad_common mad_common;
	struct ibmvfc_npiv_login_mad npiv_login;
	struct ibmvfc_discover_targets discover_targets;
	struct ibmvfc_port_login plogi;
	struct ibmvfc_process_login prli;
	struct ibmvfc_query_tgt query_tgt;
	struct ibmvfc_implicit_logout implicit_logout;
	struct ibmvfc_tmf tmf;
	struct ibmvfc_cmd cmd;
	struct ibmvfc_passthru_mad passthru;
}__attribute__((packed, aligned (8)));

enum ibmvfc_target_action {
	IBMVFC_TGT_ACTION_NONE = 0,
	IBMVFC_TGT_ACTION_INIT,
	IBMVFC_TGT_ACTION_INIT_WAIT,
	IBMVFC_TGT_ACTION_ADD_RPORT,
	IBMVFC_TGT_ACTION_DEL_RPORT,
};

struct ibmvfc_target {
	struct list_head queue;
	struct ibmvfc_host *vhost;
	u64 scsi_id;
	u64 new_scsi_id;
	struct fc_rport *rport;
	int target_id;
	enum ibmvfc_target_action action;
	int need_login;
	int init_retries;
	struct ibmvfc_service_parms service_parms;
	struct ibmvfc_service_parms service_parms_change;
	struct fc_rport_identifiers ids;
	void (*job_step) (struct ibmvfc_target *);
	struct kref kref;
};

/* a unit of work for the hosting partition */
struct ibmvfc_event {
	struct list_head queue;
	struct ibmvfc_host *vhost;
	struct ibmvfc_target *tgt;
	struct scsi_cmnd *cmnd;
	atomic_t free;
	union ibmvfc_iu *xfer_iu;
	void (*done) (struct ibmvfc_event *);
	struct ibmvfc_crq crq;
	union ibmvfc_iu iu;
	union ibmvfc_iu *sync_iu;
	struct srp_direct_buf *ext_list;
	dma_addr_t ext_list_token;
	struct completion comp;
	struct timer_list timer;
};

/* a pool of event structs for use */
struct ibmvfc_event_pool {
	struct ibmvfc_event *events;
	u32 size;
	union ibmvfc_iu *iu_storage;
	dma_addr_t iu_token;
};

enum ibmvfc_host_action {
	IBMVFC_HOST_ACTION_NONE = 0,
	IBMVFC_HOST_ACTION_INIT,
	IBMVFC_HOST_ACTION_INIT_WAIT,
	IBMVFC_HOST_ACTION_QUERY,
	IBMVFC_HOST_ACTION_QUERY_TGTS,
	IBMVFC_HOST_ACTION_TGT_DEL,
	IBMVFC_HOST_ACTION_ALLOC_TGTS,
	IBMVFC_HOST_ACTION_TGT_INIT,
	IBMVFC_HOST_ACTION_TGT_ADD,
};

enum ibmvfc_host_state {
	IBMVFC_NO_CRQ = 0,
	IBMVFC_INITIALIZING,
	IBMVFC_ACTIVE,
	IBMVFC_HALTED,
	IBMVFC_LINK_DOWN,
	IBMVFC_LINK_DEAD,
	IBMVFC_HOST_OFFLINE,
};

struct ibmvfc_host {
	char name[8];
	struct list_head queue;
	struct Scsi_Host *host;
	enum ibmvfc_host_state state;
	enum ibmvfc_host_action action;
#define IBMVFC_NUM_TRACE_INDEX_BITS		8
#define IBMVFC_NUM_TRACE_ENTRIES		(1 << IBMVFC_NUM_TRACE_INDEX_BITS)
#define IBMVFC_TRACE_SIZE	(sizeof(struct ibmvfc_trace_entry) * IBMVFC_NUM_TRACE_ENTRIES)
	struct ibmvfc_trace_entry *trace;
	u32 trace_index:IBMVFC_NUM_TRACE_INDEX_BITS;
	int num_targets;
	struct list_head targets;
	struct list_head sent;
	struct list_head free;
	struct device *dev;
	struct ibmvfc_event_pool pool;
	struct dma_pool *sg_pool;
	mempool_t *tgt_pool;
	struct ibmvfc_crq_queue crq;
	struct ibmvfc_async_crq_queue async_crq;
	struct ibmvfc_npiv_login login_info;
	union ibmvfc_npiv_login_data *login_buf;
	dma_addr_t login_buf_dma;
	int disc_buf_sz;
	int log_level;
	struct ibmvfc_discover_targets_buf *disc_buf;
	int task_set;
	int init_retries;
	int discovery_threads;
	int client_migrated;
	int reinit;
	int events_to_log;
#define IBMVFC_AE_LINKUP	0x0001
#define IBMVFC_AE_LINKDOWN	0x0002
#define IBMVFC_AE_RSCN		0x0004
	dma_addr_t disc_buf_dma;
	unsigned int partition_number;
	char partition_name[97];
	void (*job_step) (struct ibmvfc_host *);
	struct task_struct *work_thread;
	wait_queue_head_t init_wait_q;
	wait_queue_head_t work_wait_q;
};

#define DBG_CMD(CMD) do { if (ibmvfc_debug) CMD; } while (0)

#define tgt_dbg(t, fmt, ...)			\
	DBG_CMD(dev_info((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__))

#define tgt_info(t, fmt, ...)		\
	dev_info((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__)

#define tgt_err(t, fmt, ...)		\
	dev_err((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__)

#define ibmvfc_dbg(vhost, ...) \
	DBG_CMD(dev_info((vhost)->dev, ##__VA_ARGS__))

#define ibmvfc_log(vhost, level, ...) \
	do { \
		if (level >= (vhost)->log_level) \
			dev_err((vhost)->dev, ##__VA_ARGS__); \
	} while (0)

#define ENTER DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Entering %s\n", __func__))
#define LEAVE DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Leaving %s\n", __func__))

#ifdef CONFIG_SCSI_IBMVFC_TRACE
#define ibmvfc_create_trace_file(kobj, attr) sysfs_create_bin_file(kobj, attr)
#define ibmvfc_remove_trace_file(kobj, attr) sysfs_remove_bin_file(kobj, attr)
#else
#define ibmvfc_create_trace_file(kobj, attr) 0
#define ibmvfc_remove_trace_file(kobj, attr) do { } while (0)
#endif

#endif