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[SCSI] zfcp: handle unsolicited status notification lost
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / s390 / scsi / zfcp_def.h
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1da177e4
LT		 1/*
2 *
3 * linux/drivers/s390/scsi/zfcp_def.h
4 *
5 * FCP adapter driver for IBM eServer zSeries
6 *
7 * (C) Copyright IBM Corp. 2002, 2004
8 *
9 * Author(s): Martin Peschke <mpeschke@de.ibm.com>
10 * Raimund Schroeder <raimund.schroeder@de.ibm.com>
11 * Aron Zeh
12 * Wolfgang Taphorn
13 * Stefan Bader <stefan.bader@de.ibm.com>
14 * Heiko Carstens <heiko.carstens@de.ibm.com>
15 * Andreas Herrmann <aherrman@de.ibm.com>
16 * Volker Sameske <sameske@de.ibm.com>
17 *
18 * This program is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License as published by
20 * the Free Software Foundation; either version 2, or (at your option)
21 * any later version.
22 *
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
31 */
32
33
34#ifndef ZFCP_DEF_H
35#define ZFCP_DEF_H
36
37#define ZFCP_DEF_REVISION "$Revision: 1.111 $"
38
39/*************************** INCLUDES *****************************************/
40
41#include <linux/init.h>
42#include <linux/moduleparam.h>
43#include <linux/miscdevice.h>
44#include <linux/major.h>
45#include <linux/blkdev.h>
46#include <linux/delay.h>
47#include <linux/timer.h>
48#include <scsi/scsi.h>
49#include <scsi/scsi_tcq.h>
50#include <scsi/scsi_cmnd.h>
51#include <scsi/scsi_device.h>
52#include <scsi/scsi_host.h>
53#include <scsi/scsi_transport.h>
54#include <scsi/scsi_transport_fc.h>
55#include "../../fc4/fc.h"
56#include "zfcp_fsf.h"
57#include <asm/ccwdev.h>
58#include <asm/qdio.h>
59#include <asm/debug.h>
60#include <asm/ebcdic.h>
61#include <linux/mempool.h>
62#include <linux/syscalls.h>
63#include <linux/ioctl.h>
1da177e4 64
1da177e4
LT		 65
66/********************* GENERAL DEFINES *********************************/
67
68/* zfcp version number, it consists of major, minor, and patch-level number */
aef4a983 69#define ZFCP_VERSION "4.5.0"
1da177e4
LT		 70
71/**
72 * zfcp_sg_to_address - determine kernel address from struct scatterlist
73 * @list: struct scatterlist
74 * Return: kernel address
75 */
76static inline void *
77zfcp_sg_to_address(struct scatterlist *list)
78{
79 return (void *) (page_address(list->page) + list->offset);
80}
81
82/**
83 * zfcp_address_to_sg - set up struct scatterlist from kernel address
84 * @address: kernel address
85 * @list: struct scatterlist
86 */
87static inline void
88zfcp_address_to_sg(void *address, struct scatterlist *list)
89{
90 list->page = virt_to_page(address);
91 list->offset = ((unsigned long) address) & (PAGE_SIZE - 1);
92}
93
94/********************* SCSI SPECIFIC DEFINES *********************************/
95
96/* 32 bit for SCSI ID and LUN as long as the SCSI stack uses this type */
97typedef u32 scsi_id_t;
98typedef u32 scsi_lun_t;
99
100#define ZFCP_ERP_SCSI_LOW_MEM_TIMEOUT (100*HZ)
101#define ZFCP_SCSI_ER_TIMEOUT (100*HZ)
102
103/********************* CIO/QDIO SPECIFIC DEFINES *****************************/
104
105/* Adapter Identification Parameters */
106#define ZFCP_CONTROL_UNIT_TYPE 0x1731
107#define ZFCP_CONTROL_UNIT_MODEL 0x03
108#define ZFCP_DEVICE_TYPE 0x1732
109#define ZFCP_DEVICE_MODEL 0x03
110#define ZFCP_DEVICE_MODEL_PRIV 0x04
111
112/* allow as many chained SBALs as are supported by hardware */
113#define ZFCP_MAX_SBALS_PER_REQ FSF_MAX_SBALS_PER_REQ
114#define ZFCP_MAX_SBALS_PER_CT_REQ FSF_MAX_SBALS_PER_REQ
115#define ZFCP_MAX_SBALS_PER_ELS_REQ FSF_MAX_SBALS_PER_ELS_REQ
116
117/* DMQ bug workaround: don't use last SBALE */
118#define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
119
120/* index of last SBALE (with respect to DMQ bug workaround) */
121#define ZFCP_LAST_SBALE_PER_SBAL (ZFCP_MAX_SBALES_PER_SBAL - 1)
122
123/* max. number of (data buffer) SBALEs in largest SBAL chain */
124#define ZFCP_MAX_SBALES_PER_REQ \
125 (ZFCP_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2)
126 /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */
127
128/* FIXME(tune): free space should be one max. SBAL chain plus what? */
129#define ZFCP_QDIO_PCI_INTERVAL (QDIO_MAX_BUFFERS_PER_Q \
130 - (ZFCP_MAX_SBALS_PER_REQ + 4))
131
132#define ZFCP_SBAL_TIMEOUT (5*HZ)
133
134#define ZFCP_TYPE2_RECOVERY_TIME (8*HZ)
135
136/* queue polling (values in microseconds) */
137#define ZFCP_MAX_INPUT_THRESHOLD 5000 /* FIXME: tune */
138#define ZFCP_MAX_OUTPUT_THRESHOLD 1000 /* FIXME: tune */
139#define ZFCP_MIN_INPUT_THRESHOLD 1 /* ignored by QDIO layer */
140#define ZFCP_MIN_OUTPUT_THRESHOLD 1 /* ignored by QDIO layer */
141
142#define QDIO_SCSI_QFMT 1 /* 1 for FSF */
143
144/********************* FSF SPECIFIC DEFINES *********************************/
145
146#define ZFCP_ULP_INFO_VERSION 26
147#define ZFCP_QTCB_VERSION FSF_QTCB_CURRENT_VERSION
148/* ATTENTION: value must not be used by hardware */
149#define FSF_QTCB_UNSOLICITED_STATUS 0x6305
150#define ZFCP_STATUS_READ_FAILED_THRESHOLD 3
151#define ZFCP_STATUS_READS_RECOM FSF_STATUS_READS_RECOM
22753fa5
AH		 152
153/* Do 1st retry in 1 second, then double the timeout for each following retry */
154#define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP 100
155#define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES 7
1da177e4 156
aef4a983
MS		 157/* Retry 5 times every 2 second, then every minute */
158#define ZFCP_EXCHANGE_PORT_DATA_SHORT_RETRIES 5
159#define ZFCP_EXCHANGE_PORT_DATA_SHORT_SLEEP 200
160#define ZFCP_EXCHANGE_PORT_DATA_LONG_SLEEP 6000
161
1da177e4
LT		 162/* timeout value for "default timer" for fsf requests */
163#define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ);
164
165/*************** FIBRE CHANNEL PROTOCOL SPECIFIC DEFINES ********************/
166
167typedef unsigned long long wwn_t;
1da177e4
LT		 168typedef unsigned long long fcp_lun_t;
169/* data length field may be at variable position in FCP-2 FCP_CMND IU */
170typedef unsigned int fcp_dl_t;
171
172#define ZFCP_FC_SERVICE_CLASS_DEFAULT FSF_CLASS_3
173
174/* timeout for name-server lookup (in seconds) */
175#define ZFCP_NS_GID_PN_TIMEOUT 10
176
177/* largest SCSI command we can process */
178/* FCP-2 (FCP_CMND IU) allows up to (255-3+16) */
179#define ZFCP_MAX_SCSI_CMND_LENGTH 255
180/* maximum number of commands in LUN queue (tagged queueing) */
181#define ZFCP_CMND_PER_LUN 32
182
183/* task attribute values in FCP-2 FCP_CMND IU */
184#define SIMPLE_Q 0
185#define HEAD_OF_Q 1
186#define ORDERED_Q 2
187#define ACA_Q 4
188#define UNTAGGED 5
189
190/* task management flags in FCP-2 FCP_CMND IU */
191#define FCP_CLEAR_ACA 0x40
192#define FCP_TARGET_RESET 0x20
193#define FCP_LOGICAL_UNIT_RESET 0x10
194#define FCP_CLEAR_TASK_SET 0x04
195#define FCP_ABORT_TASK_SET 0x02
196
197#define FCP_CDB_LENGTH 16
198
199#define ZFCP_DID_MASK 0x00FFFFFF
200
201/* FCP(-2) FCP_CMND IU */
202struct fcp_cmnd_iu {
203 fcp_lun_t fcp_lun; /* FCP logical unit number */
204 u8 crn; /* command reference number */
205 u8 reserved0:5; /* reserved */
206 u8 task_attribute:3; /* task attribute */
207 u8 task_management_flags; /* task management flags */
208 u8 add_fcp_cdb_length:6; /* additional FCP_CDB length */
209 u8 rddata:1; /* read data */
210 u8 wddata:1; /* write data */
211 u8 fcp_cdb[FCP_CDB_LENGTH];
212} __attribute__((packed));
213
214/* FCP(-2) FCP_RSP IU */
215struct fcp_rsp_iu {
216 u8 reserved0[10];
217 union {
218 struct {
219 u8 reserved1:3;
220 u8 fcp_conf_req:1;
221 u8 fcp_resid_under:1;
222 u8 fcp_resid_over:1;
223 u8 fcp_sns_len_valid:1;
224 u8 fcp_rsp_len_valid:1;
225 } bits;
226 u8 value;
227 } validity;
228 u8 scsi_status;
229 u32 fcp_resid;
230 u32 fcp_sns_len;
231 u32 fcp_rsp_len;
232} __attribute__((packed));
233
234
235#define RSP_CODE_GOOD 0
236#define RSP_CODE_LENGTH_MISMATCH 1
237#define RSP_CODE_FIELD_INVALID 2
238#define RSP_CODE_RO_MISMATCH 3
239#define RSP_CODE_TASKMAN_UNSUPP 4
240#define RSP_CODE_TASKMAN_FAILED 5
241
242/* see fc-fs */
243#define LS_FAN 0x60000000
244#define LS_RSCN 0x61040000
245
246struct fcp_rscn_head {
247 u8 command;
248 u8 page_length; /* always 0x04 */
249 u16 payload_len;
250} __attribute__((packed));
251
252struct fcp_rscn_element {
253 u8 reserved:2;
254 u8 event_qual:4;
255 u8 addr_format:2;
256 u32 nport_did:24;
257} __attribute__((packed));
258
259#define ZFCP_PORT_ADDRESS 0x0
260#define ZFCP_AREA_ADDRESS 0x1
261#define ZFCP_DOMAIN_ADDRESS 0x2
262#define ZFCP_FABRIC_ADDRESS 0x3
263
264#define ZFCP_PORTS_RANGE_PORT 0xFFFFFF
265#define ZFCP_PORTS_RANGE_AREA 0xFFFF00
266#define ZFCP_PORTS_RANGE_DOMAIN 0xFF0000
267#define ZFCP_PORTS_RANGE_FABRIC 0x000000
268
269#define ZFCP_NO_PORTS_PER_AREA 0x100
270#define ZFCP_NO_PORTS_PER_DOMAIN 0x10000
271#define ZFCP_NO_PORTS_PER_FABRIC 0x1000000
272
273struct fcp_fan {
274 u32 command;
275 u32 fport_did;
276 wwn_t fport_wwpn;
277 wwn_t fport_wwname;
278} __attribute__((packed));
279
280/* see fc-ph */
281struct fcp_logo {
282 u32 command;
283 u32 nport_did;
284 wwn_t nport_wwpn;
285} __attribute__((packed));
286
8a36e453
MS		 287/*
288 * DBF stuff
289 */
290#define ZFCP_DBF_TAG_SIZE 4
291
292struct zfcp_dbf_dump {
293 u8 tag[ZFCP_DBF_TAG_SIZE];
294 u32 total_size; /* size of total dump data */
295 u32 offset; /* how much data has being already dumped */
296 u32 size; /* how much data comes with this record */
297 u8 data[]; /* dump data */
298} __attribute__ ((packed));
299
300/* FIXME: to be inflated when reworking the erp dbf */
301struct zfcp_erp_dbf_record {
302 u8 dummy[16];
303} __attribute__ ((packed));
304
305struct zfcp_hba_dbf_record_response {
306 u32 fsf_command;
307 u64 fsf_reqid;
308 u32 fsf_seqno;
309 u64 fsf_issued;
310 u32 fsf_prot_status;
311 u32 fsf_status;
312 u8 fsf_prot_status_qual[FSF_PROT_STATUS_QUAL_SIZE];
313 u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE];
314 u32 fsf_req_status;
315 u8 sbal_first;
316 u8 sbal_curr;
317 u8 sbal_last;
318 u8 pool;
319 u64 erp_action;
320 union {
321 struct {
322 u64 scsi_cmnd;
323 u64 scsi_serial;
324 } send_fcp;
325 struct {
326 u64 wwpn;
327 u32 d_id;
328 u32 port_handle;
329 } port;
330 struct {
331 u64 wwpn;
332 u64 fcp_lun;
333 u32 port_handle;
334 u32 lun_handle;
335 } unit;
336 struct {
337 u32 d_id;
338 u8 ls_code;
339 } send_els;
340 } data;
341} __attribute__ ((packed));
342
343struct zfcp_hba_dbf_record_status {
344 u8 failed;
345 u32 status_type;
346 u32 status_subtype;
347 struct fsf_queue_designator
348 queue_designator;
349 u32 payload_size;
350#define ZFCP_DBF_UNSOL_PAYLOAD 80
351#define ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL 32
352#define ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD 56
353#define ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT 2 * sizeof(u32)
354 u8 payload[ZFCP_DBF_UNSOL_PAYLOAD];
355} __attribute__ ((packed));
356
357struct zfcp_hba_dbf_record_qdio {
358 u32 status;
359 u32 qdio_error;
360 u32 siga_error;
361 u8 sbal_index;
362 u8 sbal_count;
363} __attribute__ ((packed));
364
365struct zfcp_hba_dbf_record {
366 u8 tag[ZFCP_DBF_TAG_SIZE];
367 u8 tag2[ZFCP_DBF_TAG_SIZE];
368 union {
369 struct zfcp_hba_dbf_record_response response;
370 struct zfcp_hba_dbf_record_status status;
371 struct zfcp_hba_dbf_record_qdio qdio;
372 } type;
373} __attribute__ ((packed));
374
375struct zfcp_san_dbf_record_ct {
376 union {
377 struct {
378 u16 cmd_req_code;
379 u8 revision;
380 u8 gs_type;
381 u8 gs_subtype;
382 u8 options;
383 u16 max_res_size;
384 } request;
385 struct {
386 u16 cmd_rsp_code;
387 u8 revision;
388 u8 reason_code;
389 u8 reason_code_expl;
390 u8 vendor_unique;
391 } response;
392 } type;
393 u32 payload_size;
394#define ZFCP_DBF_CT_PAYLOAD 24
395 u8 payload[ZFCP_DBF_CT_PAYLOAD];
396} __attribute__ ((packed));
397
398struct zfcp_san_dbf_record_els {
399 u8 ls_code;
400 u32 payload_size;
401#define ZFCP_DBF_ELS_PAYLOAD 32
402#define ZFCP_DBF_ELS_MAX_PAYLOAD 1024
403 u8 payload[ZFCP_DBF_ELS_PAYLOAD];
404} __attribute__ ((packed));
405
406struct zfcp_san_dbf_record {
407 u8 tag[ZFCP_DBF_TAG_SIZE];
408 u64 fsf_reqid;
409 u32 fsf_seqno;
410 u32 s_id;
411 u32 d_id;
412 union {
413 struct zfcp_san_dbf_record_ct ct;
414 struct zfcp_san_dbf_record_els els;
415 } type;
416} __attribute__ ((packed));
417
418struct zfcp_scsi_dbf_record {
419 u8 tag[ZFCP_DBF_TAG_SIZE];
420 u8 tag2[ZFCP_DBF_TAG_SIZE];
421 u32 scsi_id;
422 u32 scsi_lun;
423 u32 scsi_result;
424 u64 scsi_cmnd;
425 u64 scsi_serial;
426#define ZFCP_DBF_SCSI_OPCODE 16
427 u8 scsi_opcode[ZFCP_DBF_SCSI_OPCODE];
428 u8 scsi_retries;
429 u8 scsi_allowed;
430 u64 fsf_reqid;
431 u32 fsf_seqno;
432 u64 fsf_issued;
433 union {
434 struct {
435 u64 fsf_reqid;
436 u32 fsf_seqno;
437 u64 fsf_issued;
438 } new_fsf_req;
439 struct {
440 u8 rsp_validity;
441 u8 rsp_scsi_status;
442 u32 rsp_resid;
443 u8 rsp_code;
444#define ZFCP_DBF_SCSI_FCP_SNS_INFO 16
445#define ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO 256
446 u32 sns_info_len;
447 u8 sns_info[ZFCP_DBF_SCSI_FCP_SNS_INFO];
448 } fcp;
449 } type;
450} __attribute__ ((packed));
451
1da177e4
LT		 452/*
453 * FC-FS stuff
454 */
455#define R_A_TOV 10 /* seconds */
456#define ZFCP_ELS_TIMEOUT (2 * R_A_TOV)
457
458#define ZFCP_LS_RLS 0x0f
459#define ZFCP_LS_ADISC 0x52
460#define ZFCP_LS_RPS 0x56
461#define ZFCP_LS_RSCN 0x61
462#define ZFCP_LS_RNID 0x78
463
464struct zfcp_ls_rjt_par {
465 u8 action;
466 u8 reason_code;
467 u8 reason_expl;
468 u8 vendor_unique;
469} __attribute__ ((packed));
470
471struct zfcp_ls_adisc {
472 u8 code;
473 u8 field[3];
474 u32 hard_nport_id;
475 u64 wwpn;
476 u64 wwnn;
477 u32 nport_id;
478} __attribute__ ((packed));
479
480struct zfcp_ls_adisc_acc {
481 u8 code;
482 u8 field[3];
483 u32 hard_nport_id;
484 u64 wwpn;
485 u64 wwnn;
486 u32 nport_id;
487} __attribute__ ((packed));
488
489struct zfcp_rc_entry {
490 u8 code;
491 const char *description;
492};
493
494/*
495 * FC-GS-2 stuff
496 */
497#define ZFCP_CT_REVISION 0x01
498#define ZFCP_CT_DIRECTORY_SERVICE 0xFC
499#define ZFCP_CT_NAME_SERVER 0x02
500#define ZFCP_CT_SYNCHRONOUS 0x00
501#define ZFCP_CT_GID_PN 0x0121
502#define ZFCP_CT_MAX_SIZE 0x1020
503#define ZFCP_CT_ACCEPT 0x8002
504#define ZFCP_CT_REJECT 0x8001
505
506/*
507 * FC-GS-4 stuff
508 */
509#define ZFCP_CT_TIMEOUT (3 * R_A_TOV)
510
1da177e4
LT		 511/******************** LOGGING MACROS AND DEFINES *****************************/
512
513/*
514 * Logging may be applied on certain kinds of driver operations
515 * independently. Additionally, different log-levels are supported for
516 * each of these areas.
517 */
518
519#define ZFCP_NAME "zfcp"
520
521/* read-only LUN sharing switch initial value */
522#define ZFCP_RO_LUN_SHARING_DEFAULTS 0
523
524/* independent log areas */
525#define ZFCP_LOG_AREA_OTHER 0
526#define ZFCP_LOG_AREA_SCSI 1
527#define ZFCP_LOG_AREA_FSF 2
528#define ZFCP_LOG_AREA_CONFIG 3
529#define ZFCP_LOG_AREA_CIO 4
530#define ZFCP_LOG_AREA_QDIO 5
531#define ZFCP_LOG_AREA_ERP 6
532#define ZFCP_LOG_AREA_FC 7
533
534/* log level values*/
535#define ZFCP_LOG_LEVEL_NORMAL 0
536#define ZFCP_LOG_LEVEL_INFO 1
537#define ZFCP_LOG_LEVEL_DEBUG 2
538#define ZFCP_LOG_LEVEL_TRACE 3
539
540/*
541 * this allows removal of logging code by the preprocessor
542 * (the most detailed log level still to be compiled in is specified,
543 * higher log levels are removed)
544 */
545#define ZFCP_LOG_LEVEL_LIMIT ZFCP_LOG_LEVEL_TRACE
546
547/* get "loglevel" nibble assignment */
548#define ZFCP_GET_LOG_VALUE(zfcp_lognibble) \
549 ((atomic_read(&zfcp_data.loglevel) >> (zfcp_lognibble<<2)) & 0xF)
550
551/* set "loglevel" nibble */
552#define ZFCP_SET_LOG_NIBBLE(value, zfcp_lognibble) \
553 (value << (zfcp_lognibble << 2))
554
555/* all log-level defaults are combined to generate initial log-level */
556#define ZFCP_LOG_LEVEL_DEFAULTS \
557 (ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_OTHER) | \
558 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_SCSI) | \
559 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FSF) | \
560 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CONFIG) | \
561 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CIO) | \
562 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_QDIO) | \
563 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_ERP) | \
564 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FC))
565
566/* check whether we have the right level for logging */
567#define ZFCP_LOG_CHECK(level) \
568 ((ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA)) >= level)
569
570/* logging routine for zfcp */
571#define _ZFCP_LOG(fmt, args...) \
572 printk(KERN_ERR ZFCP_NAME": %s(%d): " fmt, __FUNCTION__, \
573 __LINE__ , ##args)
574
575#define ZFCP_LOG(level, fmt, args...) \
576do { \
577 if (ZFCP_LOG_CHECK(level)) \
578 _ZFCP_LOG(fmt, ##args); \
579} while (0)
580
581#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_NORMAL
582# define ZFCP_LOG_NORMAL(fmt, args...)
583#else
584# define ZFCP_LOG_NORMAL(fmt, args...) \
585do { \
586 if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_NORMAL)) \
587 printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \
588} while (0)
589#endif
590
591#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_INFO
592# define ZFCP_LOG_INFO(fmt, args...)
593#else
594# define ZFCP_LOG_INFO(fmt, args...) \
595do { \
596 if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_INFO)) \
597 printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \
598} while (0)
599#endif
600
601#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_DEBUG
602# define ZFCP_LOG_DEBUG(fmt, args...)
603#else
604# define ZFCP_LOG_DEBUG(fmt, args...) \
605 ZFCP_LOG(ZFCP_LOG_LEVEL_DEBUG, fmt , ##args)
606#endif
607
608#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_TRACE
609# define ZFCP_LOG_TRACE(fmt, args...)
610#else
611# define ZFCP_LOG_TRACE(fmt, args...) \
612 ZFCP_LOG(ZFCP_LOG_LEVEL_TRACE, fmt , ##args)
613#endif
614
1da177e4
LT		 615/*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/
616
617/*
618 * Note, the leftmost status byte is common among adapter, port
619 * and unit
620 */
621#define ZFCP_COMMON_FLAGS 0xfff00000
622#define ZFCP_SPECIFIC_FLAGS 0x000fffff
623
624/* common status bits */
625#define ZFCP_STATUS_COMMON_REMOVE 0x80000000
626#define ZFCP_STATUS_COMMON_RUNNING 0x40000000
627#define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000
628#define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000
629#define ZFCP_STATUS_COMMON_OPENING 0x08000000
630#define ZFCP_STATUS_COMMON_OPEN 0x04000000
631#define ZFCP_STATUS_COMMON_CLOSING 0x02000000
632#define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000
633#define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000
d736a27b 634#define ZFCP_STATUS_COMMON_ACCESS_BOXED 0x00400000
1da177e4
LT		 635
636/* adapter status */
637#define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002
638#define ZFCP_STATUS_ADAPTER_REGISTERED 0x00000004
639#define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008
640#define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010
641#define ZFCP_STATUS_ADAPTER_ERP_THREAD_UP 0x00000020
642#define ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL 0x00000080
643#define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100
644#define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200
aef4a983 645#define ZFCP_STATUS_ADAPTER_XPORT_OK 0x00000800
1da177e4
LT		 646
647#define ZFCP_STATUS_ADAPTER_SCSI_UP \
648 (ZFCP_STATUS_COMMON_UNBLOCKED | \
649 ZFCP_STATUS_ADAPTER_REGISTERED)
650
651
652/* FC-PH/FC-GS well-known address identifiers for generic services */
653#define ZFCP_DID_MANAGEMENT_SERVICE 0xFFFFFA
654#define ZFCP_DID_TIME_SERVICE 0xFFFFFB
655#define ZFCP_DID_DIRECTORY_SERVICE 0xFFFFFC
656#define ZFCP_DID_ALIAS_SERVICE 0xFFFFF8
657#define ZFCP_DID_KEY_DISTRIBUTION_SERVICE 0xFFFFF7
658
659/* remote port status */
660#define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001
661#define ZFCP_STATUS_PORT_DID_DID 0x00000002
662#define ZFCP_STATUS_PORT_PHYS_CLOSING 0x00000004
663#define ZFCP_STATUS_PORT_NO_WWPN 0x00000008
664#define ZFCP_STATUS_PORT_NO_SCSI_ID 0x00000010
665#define ZFCP_STATUS_PORT_INVALID_WWPN 0x00000020
666#define ZFCP_STATUS_PORT_ACCESS_DENIED 0x00000040
667
668/* for ports with well known addresses */
669#define ZFCP_STATUS_PORT_WKA \
670 (ZFCP_STATUS_PORT_NO_WWPN | \
671 ZFCP_STATUS_PORT_NO_SCSI_ID)
672
673/* logical unit status */
674#define ZFCP_STATUS_UNIT_NOTSUPPUNITRESET 0x00000001
675#define ZFCP_STATUS_UNIT_TEMPORARY 0x00000002
676#define ZFCP_STATUS_UNIT_SHARED 0x00000004
677#define ZFCP_STATUS_UNIT_READONLY 0x00000008
678
679/* FSF request status (this does not have a common part) */
680#define ZFCP_STATUS_FSFREQ_NOT_INIT 0x00000000
681#define ZFCP_STATUS_FSFREQ_POOL 0x00000001
682#define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT 0x00000002
683#define ZFCP_STATUS_FSFREQ_COMPLETED 0x00000004
684#define ZFCP_STATUS_FSFREQ_ERROR 0x00000008
685#define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010
686#define ZFCP_STATUS_FSFREQ_ABORTING 0x00000020
687#define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040
688#define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080
689#define ZFCP_STATUS_FSFREQ_ABORTED 0x00000100
690#define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200
691#define ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP 0x00000400
692#define ZFCP_STATUS_FSFREQ_RETRY 0x00000800
693#define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000
694
695/*********************** ERROR RECOVERY PROCEDURE DEFINES ********************/
696
697#define ZFCP_MAX_ERPS 3
698
699#define ZFCP_ERP_FSFREQ_TIMEOUT (30 * HZ)
700#define ZFCP_ERP_MEMWAIT_TIMEOUT HZ
701
702#define ZFCP_STATUS_ERP_TIMEDOUT 0x10000000
703#define ZFCP_STATUS_ERP_CLOSE_ONLY 0x01000000
704#define ZFCP_STATUS_ERP_DISMISSING 0x00100000
705#define ZFCP_STATUS_ERP_DISMISSED 0x00200000
706#define ZFCP_STATUS_ERP_LOWMEM 0x00400000
707
708#define ZFCP_ERP_STEP_UNINITIALIZED 0x00000000
709#define ZFCP_ERP_STEP_FSF_XCONFIG 0x00000001
710#define ZFCP_ERP_STEP_PHYS_PORT_CLOSING 0x00000010
711#define ZFCP_ERP_STEP_PORT_CLOSING 0x00000100
712#define ZFCP_ERP_STEP_NAMESERVER_OPEN 0x00000200
713#define ZFCP_ERP_STEP_NAMESERVER_LOOKUP 0x00000400
714#define ZFCP_ERP_STEP_PORT_OPENING 0x00000800
715#define ZFCP_ERP_STEP_UNIT_CLOSING 0x00001000
716#define ZFCP_ERP_STEP_UNIT_OPENING 0x00002000
717
718/* Ordered by escalation level (necessary for proper erp-code operation) */
719#define ZFCP_ERP_ACTION_REOPEN_ADAPTER 0x4
720#define ZFCP_ERP_ACTION_REOPEN_PORT_FORCED 0x3
721#define ZFCP_ERP_ACTION_REOPEN_PORT 0x2
722#define ZFCP_ERP_ACTION_REOPEN_UNIT 0x1
723
724#define ZFCP_ERP_ACTION_RUNNING 0x1
725#define ZFCP_ERP_ACTION_READY 0x2
726
727#define ZFCP_ERP_SUCCEEDED 0x0
728#define ZFCP_ERP_FAILED 0x1
729#define ZFCP_ERP_CONTINUES 0x2
730#define ZFCP_ERP_EXIT 0x3
731#define ZFCP_ERP_DISMISSED 0x4
732#define ZFCP_ERP_NOMEM 0x5
733
734
735/******************** CFDC SPECIFIC STUFF *****************************/
736
737/* Firewall data channel sense data record */
738struct zfcp_cfdc_sense_data {
739 u32 signature; /* Request signature */
740 u32 devno; /* FCP adapter device number */
741 u32 command; /* Command code */
742 u32 fsf_status; /* FSF request status and status qualifier */
743 u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE];
744 u8 payloads[256]; /* Access conflicts list */
745 u8 control_file[0]; /* Access control table */
746};
747
748#define ZFCP_CFDC_SIGNATURE 0xCFDCACDF
749
750#define ZFCP_CFDC_CMND_DOWNLOAD_NORMAL 0x00010001
751#define ZFCP_CFDC_CMND_DOWNLOAD_FORCE 0x00010101
752#define ZFCP_CFDC_CMND_FULL_ACCESS 0x00000201
753#define ZFCP_CFDC_CMND_RESTRICTED_ACCESS 0x00000401
754#define ZFCP_CFDC_CMND_UPLOAD 0x00010002
755
756#define ZFCP_CFDC_DOWNLOAD 0x00000001
757#define ZFCP_CFDC_UPLOAD 0x00000002
758#define ZFCP_CFDC_WITH_CONTROL_FILE 0x00010000
759
760#define ZFCP_CFDC_DEV_NAME "zfcp_cfdc"
761#define ZFCP_CFDC_DEV_MAJOR MISC_MAJOR
762#define ZFCP_CFDC_DEV_MINOR MISC_DYNAMIC_MINOR
763
764#define ZFCP_CFDC_MAX_CONTROL_FILE_SIZE 127 * 1024
765
766/************************* STRUCTURE DEFINITIONS *****************************/
767
768struct zfcp_fsf_req;
769
770/* holds various memory pools of an adapter */
771struct zfcp_adapter_mempool {
772 mempool_t *fsf_req_erp;
773 mempool_t *fsf_req_scsi;
774 mempool_t *fsf_req_abort;
775 mempool_t *fsf_req_status_read;
776 mempool_t *data_status_read;
777 mempool_t *data_gid_pn;
778};
779
1da177e4
LT		 780/*
781 * header for CT_IU
782 */
783struct ct_hdr {
784 u8 revision; // 0x01
785 u8 in_id[3]; // 0x00
786 u8 gs_type; // 0xFC Directory Service
787 u8 gs_subtype; // 0x02 Name Server
788 u8 options; // 0x00 single bidirectional exchange
789 u8 reserved0;
790 u16 cmd_rsp_code; // 0x0121 GID_PN, or 0x0100 GA_NXT
791 u16 max_res_size; // <= (4096 - 16) / 4
792 u8 reserved1;
793 u8 reason_code;
794 u8 reason_code_expl;
795 u8 vendor_unique;
796} __attribute__ ((packed));
797
798/* nameserver request CT_IU -- for requests where
799 * a port name is required */
800struct ct_iu_gid_pn_req {
801 struct ct_hdr header;
802 wwn_t wwpn;
803} __attribute__ ((packed));
804
805/* FS_ACC IU and data unit for GID_PN nameserver request */
806struct ct_iu_gid_pn_resp {
807 struct ct_hdr header;
13e1e1f0 808 u32 d_id;
1da177e4
LT		 809} __attribute__ ((packed));
810
811typedef void (*zfcp_send_ct_handler_t)(unsigned long);
812
813/**
814 * struct zfcp_send_ct - used to pass parameters to function zfcp_fsf_send_ct
815 * @port: port where the request is sent to
816 * @req: scatter-gather list for request
817 * @resp: scatter-gather list for response
818 * @req_count: number of elements in request scatter-gather list
819 * @resp_count: number of elements in response scatter-gather list
820 * @handler: handler function (called for response to the request)
821 * @handler_data: data passed to handler function
822 * @pool: pointer to memory pool for ct request structure
823 * @timeout: FSF timeout for this request
824 * @timer: timer (e.g. for request initiated by erp)
825 * @completion: completion for synchronization purposes
826 * @status: used to pass error status to calling function
827 */
828struct zfcp_send_ct {
829 struct zfcp_port *port;
830 struct scatterlist *req;
831 struct scatterlist *resp;
832 unsigned int req_count;
833 unsigned int resp_count;
834 zfcp_send_ct_handler_t handler;
835 unsigned long handler_data;
836 mempool_t *pool;
837 int timeout;
838 struct timer_list *timer;
839 struct completion *completion;
840 int status;
841};
842
843/* used for name server requests in error recovery */
844struct zfcp_gid_pn_data {
845 struct zfcp_send_ct ct;
846 struct scatterlist req;
847 struct scatterlist resp;
848 struct ct_iu_gid_pn_req ct_iu_req;
849 struct ct_iu_gid_pn_resp ct_iu_resp;
850 struct zfcp_port *port;
851};
852
853typedef void (*zfcp_send_els_handler_t)(unsigned long);
854
855/**
856 * struct zfcp_send_els - used to pass parameters to function zfcp_fsf_send_els
857 * @adapter: adapter where request is sent from
64b29a13 858 * @port: port where ELS is destinated (port reference count has to be increased)
1da177e4
LT		 859 * @d_id: destiniation id of port where request is sent to
860 * @req: scatter-gather list for request
861 * @resp: scatter-gather list for response
862 * @req_count: number of elements in request scatter-gather list
863 * @resp_count: number of elements in response scatter-gather list
864 * @handler: handler function (called for response to the request)
865 * @handler_data: data passed to handler function
866 * @timer: timer (e.g. for request initiated by erp)
867 * @completion: completion for synchronization purposes
868 * @ls_code: hex code of ELS command
869 * @status: used to pass error status to calling function
870 */
871struct zfcp_send_els {
872 struct zfcp_adapter *adapter;
64b29a13 873 struct zfcp_port *port;
13e1e1f0 874 u32 d_id;
1da177e4
LT		 875 struct scatterlist *req;
876 struct scatterlist *resp;
877 unsigned int req_count;
878 unsigned int resp_count;
879 zfcp_send_els_handler_t handler;
880 unsigned long handler_data;
881 struct timer_list *timer;
882 struct completion *completion;
883 int ls_code;
884 int status;
885};
886
1da177e4
LT		 887struct zfcp_qdio_queue {
888 struct qdio_buffer *buffer[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */
889 u8 free_index; /* index of next free bfr
890 in queue (free_count>0) */
891 atomic_t free_count; /* number of free buffers
892 in queue */
893 rwlock_t queue_lock; /* lock for operations on queue */
894 int distance_from_int; /* SBALs used since PCI indication
895 was last set */
896};
897
898struct zfcp_erp_action {
899 struct list_head list;
900 int action; /* requested action code */
901 struct zfcp_adapter *adapter; /* device which should be recovered */
902 struct zfcp_port *port;
903 struct zfcp_unit *unit;
904 volatile u32 status; /* recovery status */
905 u32 step; /* active step of this erp action */
906 struct zfcp_fsf_req *fsf_req; /* fsf request currently pending
907 for this action */
908 struct timer_list timer;
909};
910
911
912struct zfcp_adapter {
913 struct list_head list; /* list of adapters */
914 atomic_t refcount; /* reference count */
915 wait_queue_head_t remove_wq; /* can be used to wait for
916 refcount drop to zero */
6f71d9bc
JB		 917 wwn_t peer_wwnn; /* P2P peer WWNN */
918 wwn_t peer_wwpn; /* P2P peer WWPN */
13e1e1f0 919 u32 peer_d_id; /* P2P peer D_ID */
aef4a983 920 wwn_t physical_wwpn; /* WWPN of physical port */
13e1e1f0 921 u32 physical_s_id; /* local FC port ID */
1da177e4
LT		 922 struct ccw_device *ccw_device; /* S/390 ccw device */
923 u8 fc_service_class;
924 u32 fc_topology; /* FC topology */
1da177e4
LT		 925 u32 hydra_version; /* Hydra version */
926 u32 fsf_lic_version;
aef4a983
MS		 927 u32 adapter_features; /* FCP channel features */
928 u32 connection_features; /* host connection features */
1da177e4 929 u32 hardware_version; /* of FCP channel */
1da177e4
LT		 930 struct Scsi_Host *scsi_host; /* Pointer to mid-layer */
931 unsigned short scsi_host_no; /* Assigned host number */
932 unsigned char name[9];
933 struct list_head port_list_head; /* remote port list */
934 struct list_head port_remove_lh; /* head of ports to be
935 removed */
936 u32 ports; /* number of remote ports */
937 struct timer_list scsi_er_timer; /* SCSI err recovery watch */
938 struct list_head fsf_req_list_head; /* head of FSF req list */
1db2c9c0 939 spinlock_t fsf_req_list_lock; /* lock for ops on list of
1da177e4
LT		 940 FSF requests */
941 atomic_t fsf_reqs_active; /* # active FSF reqs */
942 struct zfcp_qdio_queue request_queue; /* request queue */
943 u32 fsf_req_seq_no; /* FSF cmnd seq number */
944 wait_queue_head_t request_wq; /* can be used to wait for
945 more avaliable SBALs */
946 struct zfcp_qdio_queue response_queue; /* response queue */
947 rwlock_t abort_lock; /* Protects against SCSI
948 stack abort/command
949 completion races */
950 u16 status_read_failed; /* # failed status reads */
951 atomic_t status; /* status of this adapter */
952 struct list_head erp_ready_head; /* error recovery for this
953 adapter/devices */
954 struct list_head erp_running_head;
955 rwlock_t erp_lock;
956 struct semaphore erp_ready_sem;
957 wait_queue_head_t erp_thread_wqh;
958 wait_queue_head_t erp_done_wqh;
959 struct zfcp_erp_action erp_action; /* pending error recovery */
960 atomic_t erp_counter;
961 u32 erp_total_count; /* total nr of enqueued erp
962 actions */
963 u32 erp_low_mem_count; /* nr of erp actions waiting
964 for memory */
965 struct zfcp_port *nameserver_port; /* adapter's nameserver */
8a36e453
MS		 966 debug_info_t *erp_dbf;
967 debug_info_t *hba_dbf;
968 debug_info_t *san_dbf; /* debug feature areas */
969 debug_info_t *scsi_dbf;
970 spinlock_t erp_dbf_lock;
971 spinlock_t hba_dbf_lock;
972 spinlock_t san_dbf_lock;
973 spinlock_t scsi_dbf_lock;
974 struct zfcp_erp_dbf_record erp_dbf_buf;
975 struct zfcp_hba_dbf_record hba_dbf_buf;
976 struct zfcp_san_dbf_record san_dbf_buf;
977 struct zfcp_scsi_dbf_record scsi_dbf_buf;
1da177e4
LT		 978 struct zfcp_adapter_mempool pool; /* Adapter memory pools */
979 struct qdio_initialize qdio_init_data; /* for qdio_establish */
980 struct device generic_services; /* directory for WKA ports */
981};
982
983/*
984 * the struct device sysfs_device must be at the beginning of this structure.
985 * pointer to struct device is used to free port structure in release function
986 * of the device. don't change!
987 */
988struct zfcp_port {
989 struct device sysfs_device; /* sysfs device */
3859f6a2 990 struct fc_rport *rport; /* rport of fc transport class */
1da177e4
LT		 991 struct list_head list; /* list of remote ports */
992 atomic_t refcount; /* reference count */
993 wait_queue_head_t remove_wq; /* can be used to wait for
994 refcount drop to zero */
995 struct zfcp_adapter *adapter; /* adapter used to access port */
996 struct list_head unit_list_head; /* head of logical unit list */
997 struct list_head unit_remove_lh; /* head of luns to be removed
998 list */
999 u32 units; /* # of logical units in list */
1000 atomic_t status; /* status of this remote port */
1da177e4
LT		 1001 wwn_t wwnn; /* WWNN if known */
1002 wwn_t wwpn; /* WWPN */
13e1e1f0 1003 u32 d_id; /* D_ID */
1da177e4
LT		 1004 u32 handle; /* handle assigned by FSF */
1005 struct zfcp_erp_action erp_action; /* pending error recovery */
1006 atomic_t erp_counter;
1007};
1008
1009/* the struct device sysfs_device must be at the beginning of this structure.
1010 * pointer to struct device is used to free unit structure in release function
1011 * of the device. don't change!
1012 */
1013struct zfcp_unit {
1014 struct device sysfs_device; /* sysfs device */
1015 struct list_head list; /* list of logical units */
1016 atomic_t refcount; /* reference count */
1017 wait_queue_head_t remove_wq; /* can be used to wait for
1018 refcount drop to zero */
1019 struct zfcp_port *port; /* remote port of unit */
1020 atomic_t status; /* status of this logical unit */
1021 scsi_lun_t scsi_lun; /* own SCSI LUN */
1022 fcp_lun_t fcp_lun; /* own FCP_LUN */
1023 u32 handle; /* handle assigned by FSF */
1024 struct scsi_device *device; /* scsi device struct pointer */
1025 struct zfcp_erp_action erp_action; /* pending error recovery */
1026 atomic_t erp_counter;
1027};
1028
1029/* FSF request */
1030struct zfcp_fsf_req {
1031 struct list_head list; /* list of FSF requests */
1032 struct zfcp_adapter *adapter; /* adapter request belongs to */
1033 u8 sbal_number; /* nr of SBALs free for use */
1034 u8 sbal_first; /* first SBAL for this request */
1035 u8 sbal_last; /* last possible SBAL for
1036 this reuest */
1037 u8 sbal_curr; /* current SBAL during creation
1038 of request */
1039 u8 sbale_curr; /* current SBALE during creation
1040 of request */
1041 wait_queue_head_t completion_wq; /* can be used by a routine
1042 to wait for completion */
1043 volatile u32 status; /* status of this request */
1044 u32 fsf_command; /* FSF Command copy */
1045 struct fsf_qtcb *qtcb; /* address of associated QTCB */
1046 u32 seq_no; /* Sequence number of request */
059c97d0 1047 unsigned long data; /* private data of request */
1da177e4
LT		 1048 struct zfcp_erp_action *erp_action; /* used if this request is
1049 issued on behalf of erp */
1050 mempool_t *pool; /* used if request was alloacted
1051 from emergency pool */
8a36e453 1052 unsigned long long issued; /* request sent time (STCK) */
059c97d0 1053 struct zfcp_unit *unit;
1da177e4
LT		 1054};
1055
1056typedef void zfcp_fsf_req_handler_t(struct zfcp_fsf_req*);
1057
1058/* driver data */
1059struct zfcp_data {
1060 struct scsi_host_template scsi_host_template;
1061 atomic_t status; /* Module status flags */
1062 struct list_head adapter_list_head; /* head of adapter list */
1063 struct list_head adapter_remove_lh; /* head of adapters to be
1064 removed */
1065 rwlock_t status_read_lock; /* for status read thread */
1066 struct list_head status_read_receive_head;
1067 struct list_head status_read_send_head;
1068 struct semaphore status_read_sema;
1069 wait_queue_head_t status_read_thread_wqh;
1070 u32 adapters; /* # of adapters in list */
1071 rwlock_t config_lock; /* serialises changes
1072 to adapter/port/unit
1073 lists */
1074 struct semaphore config_sema; /* serialises configuration
1075 changes */
1076 atomic_t loglevel; /* current loglevel */
1077 char init_busid[BUS_ID_SIZE];
1078 wwn_t init_wwpn;
1079 fcp_lun_t init_fcp_lun;
1080 char *driver_version;
1081};
1082
1083/**
1084 * struct zfcp_sg_list - struct describing a scatter-gather list
1085 * @sg: pointer to array of (struct scatterlist)
1086 * @count: number of elements in scatter-gather list
1087 */
1088struct zfcp_sg_list {
1089 struct scatterlist *sg;
1090 unsigned int count;
1091};
1092
1093/* number of elements for various memory pools */
1094#define ZFCP_POOL_FSF_REQ_ERP_NR 1
1095#define ZFCP_POOL_FSF_REQ_SCSI_NR 1
1096#define ZFCP_POOL_FSF_REQ_ABORT_NR 1
1097#define ZFCP_POOL_STATUS_READ_NR ZFCP_STATUS_READS_RECOM
1098#define ZFCP_POOL_DATA_GID_PN_NR 1
1099
1100/* struct used by memory pools for fsf_requests */
1101struct zfcp_fsf_req_pool_element {
1102 struct zfcp_fsf_req fsf_req;
1103 struct fsf_qtcb qtcb;
1104};
1105
1106/********************** ZFCP SPECIFIC DEFINES ********************************/
1107
1108#define ZFCP_FSFREQ_CLEANUP_TIMEOUT HZ/10
1109
1110#define ZFCP_KNOWN 0x00000001
1111#define ZFCP_REQ_AUTO_CLEANUP 0x00000002
1112#define ZFCP_WAIT_FOR_SBAL 0x00000004
1113#define ZFCP_REQ_NO_QTCB 0x00000008
1114
1115#define ZFCP_SET 0x00000100
1116#define ZFCP_CLEAR 0x00000200
1117
1118#define ZFCP_INTERRUPTIBLE 1
1119#define ZFCP_UNINTERRUPTIBLE 0
1120
1121#ifndef atomic_test_mask
1122#define atomic_test_mask(mask, target) \
1123 ((atomic_read(target) & mask) == mask)
1124#endif
1125
1126extern void _zfcp_hex_dump(char *, int);
1127#define ZFCP_HEX_DUMP(level, addr, count) \
1128 if (ZFCP_LOG_CHECK(level)) { \
1129 _zfcp_hex_dump(addr, count); \
1130 }
1131
1132#define zfcp_get_busid_by_adapter(adapter) (adapter->ccw_device->dev.bus_id)
1133#define zfcp_get_busid_by_port(port) (zfcp_get_busid_by_adapter(port->adapter))
1134#define zfcp_get_busid_by_unit(unit) (zfcp_get_busid_by_port(unit->port))
1135
1136/*
1137 * functions needed for reference/usage counting
1138 */
1139
1140static inline void
1141zfcp_unit_get(struct zfcp_unit *unit)
1142{
1143 atomic_inc(&unit->refcount);
1144}
1145
1146static inline void
1147zfcp_unit_put(struct zfcp_unit *unit)
1148{
1149 if (atomic_dec_return(&unit->refcount) == 0)
1150 wake_up(&unit->remove_wq);
1151}
1152
1153static inline void
1154zfcp_unit_wait(struct zfcp_unit *unit)
1155{
1156 wait_event(unit->remove_wq, atomic_read(&unit->refcount) == 0);
1157}
1158
1159static inline void
1160zfcp_port_get(struct zfcp_port *port)
1161{
1162 atomic_inc(&port->refcount);
1163}
1164
1165static inline void
1166zfcp_port_put(struct zfcp_port *port)
1167{
1168 if (atomic_dec_return(&port->refcount) == 0)
1169 wake_up(&port->remove_wq);
1170}
1171
1172static inline void
1173zfcp_port_wait(struct zfcp_port *port)
1174{
1175 wait_event(port->remove_wq, atomic_read(&port->refcount) == 0);
1176}
1177
1178static inline void
1179zfcp_adapter_get(struct zfcp_adapter *adapter)
1180{
1181 atomic_inc(&adapter->refcount);
1182}
1183
1184static inline void
1185zfcp_adapter_put(struct zfcp_adapter *adapter)
1186{
1187 if (atomic_dec_return(&adapter->refcount) == 0)
1188 wake_up(&adapter->remove_wq);
1189}
1190
1191static inline void
1192zfcp_adapter_wait(struct zfcp_adapter *adapter)
1193{
1194 wait_event(adapter->remove_wq, atomic_read(&adapter->refcount) == 0);
1195}
1196
1197#endif /* ZFCP_DEF_H */
kernel source for telekom puls (alcatel/mediatek)