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[TG3]: Set minimal hw interrupt mitigation.
[linux-2.6/verdex.git] / drivers / s390 / scsi / zfcp_def.h
blobc5daf372f853d556c83abcf2ad475d65fda581b5
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>
64
65 /************************ DEBUG FLAGS *****************************************/
66
67 #define ZFCP_PRINT_FLAGS
68
69 /********************* GENERAL DEFINES *********************************/
70
71 /* zfcp version number, it consists of major, minor, and patch-level number */
72 #define ZFCP_VERSION "4.3.0"
73
74 /**
75 * zfcp_sg_to_address - determine kernel address from struct scatterlist
76 * @list: struct scatterlist
77 * Return: kernel address
78 */
79 static inline void *
80 zfcp_sg_to_address(struct scatterlist *list)
81 {
82 return (void *) (page_address(list->page) + list->offset);
83 }
84
85 /**
86 * zfcp_address_to_sg - set up struct scatterlist from kernel address
87 * @address: kernel address
88 * @list: struct scatterlist
89 */
90 static inline void
91 zfcp_address_to_sg(void *address, struct scatterlist *list)
92 {
93 list->page = virt_to_page(address);
94 list->offset = ((unsigned long) address) & (PAGE_SIZE - 1);
95 }
96
97 /********************* SCSI SPECIFIC DEFINES *********************************/
98
99 /* 32 bit for SCSI ID and LUN as long as the SCSI stack uses this type */
100 typedef u32 scsi_id_t;
101 typedef u32 scsi_lun_t;
102
103 #define ZFCP_ERP_SCSI_LOW_MEM_TIMEOUT (100*HZ)
104 #define ZFCP_SCSI_ER_TIMEOUT (100*HZ)
105
106 /********************* CIO/QDIO SPECIFIC DEFINES *****************************/
107
108 /* Adapter Identification Parameters */
109 #define ZFCP_CONTROL_UNIT_TYPE 0x1731
110 #define ZFCP_CONTROL_UNIT_MODEL 0x03
111 #define ZFCP_DEVICE_TYPE 0x1732
112 #define ZFCP_DEVICE_MODEL 0x03
113 #define ZFCP_DEVICE_MODEL_PRIV 0x04
114
115 /* allow as many chained SBALs as are supported by hardware */
116 #define ZFCP_MAX_SBALS_PER_REQ FSF_MAX_SBALS_PER_REQ
117 #define ZFCP_MAX_SBALS_PER_CT_REQ FSF_MAX_SBALS_PER_REQ
118 #define ZFCP_MAX_SBALS_PER_ELS_REQ FSF_MAX_SBALS_PER_ELS_REQ
119
120 /* DMQ bug workaround: don't use last SBALE */
121 #define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
122
123 /* index of last SBALE (with respect to DMQ bug workaround) */
124 #define ZFCP_LAST_SBALE_PER_SBAL (ZFCP_MAX_SBALES_PER_SBAL - 1)
125
126 /* max. number of (data buffer) SBALEs in largest SBAL chain */
127 #define ZFCP_MAX_SBALES_PER_REQ \
128 (ZFCP_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2)
129 /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */
130
131 /* FIXME(tune): free space should be one max. SBAL chain plus what? */
132 #define ZFCP_QDIO_PCI_INTERVAL (QDIO_MAX_BUFFERS_PER_Q \
133 - (ZFCP_MAX_SBALS_PER_REQ + 4))
134
135 #define ZFCP_SBAL_TIMEOUT (5*HZ)
136
137 #define ZFCP_TYPE2_RECOVERY_TIME (8*HZ)
138
139 /* queue polling (values in microseconds) */
140 #define ZFCP_MAX_INPUT_THRESHOLD 5000 /* FIXME: tune */
141 #define ZFCP_MAX_OUTPUT_THRESHOLD 1000 /* FIXME: tune */
142 #define ZFCP_MIN_INPUT_THRESHOLD 1 /* ignored by QDIO layer */
143 #define ZFCP_MIN_OUTPUT_THRESHOLD 1 /* ignored by QDIO layer */
144
145 #define QDIO_SCSI_QFMT 1 /* 1 for FSF */
146
147 /********************* FSF SPECIFIC DEFINES *********************************/
148
149 #define ZFCP_ULP_INFO_VERSION 26
150 #define ZFCP_QTCB_VERSION FSF_QTCB_CURRENT_VERSION
151 /* ATTENTION: value must not be used by hardware */
152 #define FSF_QTCB_UNSOLICITED_STATUS 0x6305
153 #define ZFCP_STATUS_READ_FAILED_THRESHOLD 3
154 #define ZFCP_STATUS_READS_RECOM FSF_STATUS_READS_RECOM
155 #define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES 6
156 #define ZFCP_EXCHANGE_CONFIG_DATA_SLEEP 50
157
158 /* timeout value for "default timer" for fsf requests */
159 #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ);
160
161 /*************** FIBRE CHANNEL PROTOCOL SPECIFIC DEFINES ********************/
162
163 typedef unsigned long long wwn_t;
164 typedef unsigned int fc_id_t;
165 typedef unsigned long long fcp_lun_t;
166 /* data length field may be at variable position in FCP-2 FCP_CMND IU */
167 typedef unsigned int fcp_dl_t;
168
169 #define ZFCP_FC_SERVICE_CLASS_DEFAULT FSF_CLASS_3
170
171 /* timeout for name-server lookup (in seconds) */
172 #define ZFCP_NS_GID_PN_TIMEOUT 10
173
174 /* largest SCSI command we can process */
175 /* FCP-2 (FCP_CMND IU) allows up to (255-3+16) */
176 #define ZFCP_MAX_SCSI_CMND_LENGTH 255
177 /* maximum number of commands in LUN queue (tagged queueing) */
178 #define ZFCP_CMND_PER_LUN 32
179
180 /* task attribute values in FCP-2 FCP_CMND IU */
181 #define SIMPLE_Q 0
182 #define HEAD_OF_Q 1
183 #define ORDERED_Q 2
184 #define ACA_Q 4
185 #define UNTAGGED 5
186
187 /* task management flags in FCP-2 FCP_CMND IU */
188 #define FCP_CLEAR_ACA 0x40
189 #define FCP_TARGET_RESET 0x20
190 #define FCP_LOGICAL_UNIT_RESET 0x10
191 #define FCP_CLEAR_TASK_SET 0x04
192 #define FCP_ABORT_TASK_SET 0x02
193
194 #define FCP_CDB_LENGTH 16
195
196 #define ZFCP_DID_MASK 0x00FFFFFF
197
198 /* FCP(-2) FCP_CMND IU */
199 struct fcp_cmnd_iu {
200 fcp_lun_t fcp_lun; /* FCP logical unit number */
201 u8 crn; /* command reference number */
202 u8 reserved0:5; /* reserved */
203 u8 task_attribute:3; /* task attribute */
204 u8 task_management_flags; /* task management flags */
205 u8 add_fcp_cdb_length:6; /* additional FCP_CDB length */
206 u8 rddata:1; /* read data */
207 u8 wddata:1; /* write data */
208 u8 fcp_cdb[FCP_CDB_LENGTH];
209 } __attribute__((packed));
210
211 /* FCP(-2) FCP_RSP IU */
212 struct fcp_rsp_iu {
213 u8 reserved0[10];
214 union {
215 struct {
216 u8 reserved1:3;
217 u8 fcp_conf_req:1;
218 u8 fcp_resid_under:1;
219 u8 fcp_resid_over:1;
220 u8 fcp_sns_len_valid:1;
221 u8 fcp_rsp_len_valid:1;
222 } bits;
223 u8 value;
224 } validity;
225 u8 scsi_status;
226 u32 fcp_resid;
227 u32 fcp_sns_len;
228 u32 fcp_rsp_len;
229 } __attribute__((packed));
230
231
232 #define RSP_CODE_GOOD 0
233 #define RSP_CODE_LENGTH_MISMATCH 1
234 #define RSP_CODE_FIELD_INVALID 2
235 #define RSP_CODE_RO_MISMATCH 3
236 #define RSP_CODE_TASKMAN_UNSUPP 4
237 #define RSP_CODE_TASKMAN_FAILED 5
238
239 /* see fc-fs */
240 #define LS_FAN 0x60000000
241 #define LS_RSCN 0x61040000
242
243 struct fcp_rscn_head {
244 u8 command;
245 u8 page_length; /* always 0x04 */
246 u16 payload_len;
247 } __attribute__((packed));
248
249 struct fcp_rscn_element {
250 u8 reserved:2;
251 u8 event_qual:4;
252 u8 addr_format:2;
253 u32 nport_did:24;
254 } __attribute__((packed));
255
256 #define ZFCP_PORT_ADDRESS 0x0
257 #define ZFCP_AREA_ADDRESS 0x1
258 #define ZFCP_DOMAIN_ADDRESS 0x2
259 #define ZFCP_FABRIC_ADDRESS 0x3
260
261 #define ZFCP_PORTS_RANGE_PORT 0xFFFFFF
262 #define ZFCP_PORTS_RANGE_AREA 0xFFFF00
263 #define ZFCP_PORTS_RANGE_DOMAIN 0xFF0000
264 #define ZFCP_PORTS_RANGE_FABRIC 0x000000
265
266 #define ZFCP_NO_PORTS_PER_AREA 0x100
267 #define ZFCP_NO_PORTS_PER_DOMAIN 0x10000
268 #define ZFCP_NO_PORTS_PER_FABRIC 0x1000000
269
270 struct fcp_fan {
271 u32 command;
272 u32 fport_did;
273 wwn_t fport_wwpn;
274 wwn_t fport_wwname;
275 } __attribute__((packed));
276
277 /* see fc-ph */
278 struct fcp_logo {
279 u32 command;
280 u32 nport_did;
281 wwn_t nport_wwpn;
282 } __attribute__((packed));
283
284 /*
285 * FC-FS stuff
286 */
287 #define R_A_TOV 10 /* seconds */
288 #define ZFCP_ELS_TIMEOUT (2 * R_A_TOV)
289
290 #define ZFCP_LS_RLS 0x0f
291 #define ZFCP_LS_ADISC 0x52
292 #define ZFCP_LS_RPS 0x56
293 #define ZFCP_LS_RSCN 0x61
294 #define ZFCP_LS_RNID 0x78
295
296 struct zfcp_ls_rjt_par {
297 u8 action;
298 u8 reason_code;
299 u8 reason_expl;
300 u8 vendor_unique;
301 } __attribute__ ((packed));
302
303 struct zfcp_ls_adisc {
304 u8 code;
305 u8 field[3];
306 u32 hard_nport_id;
307 u64 wwpn;
308 u64 wwnn;
309 u32 nport_id;
310 } __attribute__ ((packed));
311
312 struct zfcp_ls_adisc_acc {
313 u8 code;
314 u8 field[3];
315 u32 hard_nport_id;
316 u64 wwpn;
317 u64 wwnn;
318 u32 nport_id;
319 } __attribute__ ((packed));
320
321 struct zfcp_rc_entry {
322 u8 code;
323 const char *description;
324 };
325
326 /*
327 * FC-GS-2 stuff
328 */
329 #define ZFCP_CT_REVISION 0x01
330 #define ZFCP_CT_DIRECTORY_SERVICE 0xFC
331 #define ZFCP_CT_NAME_SERVER 0x02
332 #define ZFCP_CT_SYNCHRONOUS 0x00
333 #define ZFCP_CT_GID_PN 0x0121
334 #define ZFCP_CT_MAX_SIZE 0x1020
335 #define ZFCP_CT_ACCEPT 0x8002
336 #define ZFCP_CT_REJECT 0x8001
337
338 /*
339 * FC-GS-4 stuff
340 */
341 #define ZFCP_CT_TIMEOUT (3 * R_A_TOV)
342
343
344 /***************** S390 DEBUG FEATURE SPECIFIC DEFINES ***********************/
345
346 /* debug feature entries per adapter */
347 #define ZFCP_ERP_DBF_INDEX 1
348 #define ZFCP_ERP_DBF_AREAS 2
349 #define ZFCP_ERP_DBF_LENGTH 16
350 #define ZFCP_ERP_DBF_LEVEL 3
351 #define ZFCP_ERP_DBF_NAME "zfcperp"
352
353 #define ZFCP_CMD_DBF_INDEX 2
354 #define ZFCP_CMD_DBF_AREAS 1
355 #define ZFCP_CMD_DBF_LENGTH 8
356 #define ZFCP_CMD_DBF_LEVEL 3
357 #define ZFCP_CMD_DBF_NAME "zfcpcmd"
358
359 #define ZFCP_ABORT_DBF_INDEX 2
360 #define ZFCP_ABORT_DBF_AREAS 1
361 #define ZFCP_ABORT_DBF_LENGTH 8
362 #define ZFCP_ABORT_DBF_LEVEL 6
363 #define ZFCP_ABORT_DBF_NAME "zfcpabt"
364
365 #define ZFCP_IN_ELS_DBF_INDEX 2
366 #define ZFCP_IN_ELS_DBF_AREAS 1
367 #define ZFCP_IN_ELS_DBF_LENGTH 8
368 #define ZFCP_IN_ELS_DBF_LEVEL 6
369 #define ZFCP_IN_ELS_DBF_NAME "zfcpels"
370
371 /******************** LOGGING MACROS AND DEFINES *****************************/
372
373 /*
374 * Logging may be applied on certain kinds of driver operations
375 * independently. Additionally, different log-levels are supported for
376 * each of these areas.
377 */
378
379 #define ZFCP_NAME "zfcp"
380
381 /* read-only LUN sharing switch initial value */
382 #define ZFCP_RO_LUN_SHARING_DEFAULTS 0
383
384 /* independent log areas */
385 #define ZFCP_LOG_AREA_OTHER 0
386 #define ZFCP_LOG_AREA_SCSI 1
387 #define ZFCP_LOG_AREA_FSF 2
388 #define ZFCP_LOG_AREA_CONFIG 3
389 #define ZFCP_LOG_AREA_CIO 4
390 #define ZFCP_LOG_AREA_QDIO 5
391 #define ZFCP_LOG_AREA_ERP 6
392 #define ZFCP_LOG_AREA_FC 7
393
394 /* log level values*/
395 #define ZFCP_LOG_LEVEL_NORMAL 0
396 #define ZFCP_LOG_LEVEL_INFO 1
397 #define ZFCP_LOG_LEVEL_DEBUG 2
398 #define ZFCP_LOG_LEVEL_TRACE 3
399
400 /*
401 * this allows removal of logging code by the preprocessor
402 * (the most detailed log level still to be compiled in is specified,
403 * higher log levels are removed)
404 */
405 #define ZFCP_LOG_LEVEL_LIMIT ZFCP_LOG_LEVEL_TRACE
406
407 /* get "loglevel" nibble assignment */
408 #define ZFCP_GET_LOG_VALUE(zfcp_lognibble) \
409 ((atomic_read(&zfcp_data.loglevel) >> (zfcp_lognibble<<2)) & 0xF)
410
411 /* set "loglevel" nibble */
412 #define ZFCP_SET_LOG_NIBBLE(value, zfcp_lognibble) \
413 (value << (zfcp_lognibble << 2))
414
415 /* all log-level defaults are combined to generate initial log-level */
416 #define ZFCP_LOG_LEVEL_DEFAULTS \
417 (ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_OTHER) | \
418 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_SCSI) | \
419 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FSF) | \
420 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CONFIG) | \
421 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CIO) | \
422 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_QDIO) | \
423 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_ERP) | \
424 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FC))
425
426 /* check whether we have the right level for logging */
427 #define ZFCP_LOG_CHECK(level) \
428 ((ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA)) >= level)
429
430 /* logging routine for zfcp */
431 #define _ZFCP_LOG(fmt, args...) \
432 printk(KERN_ERR ZFCP_NAME": %s(%d): " fmt, __FUNCTION__, \
433 __LINE__ , ##args)
434
435 #define ZFCP_LOG(level, fmt, args...) \
436 do { \
437 if (ZFCP_LOG_CHECK(level)) \
438 _ZFCP_LOG(fmt, ##args); \
439 } while (0)
440
441 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_NORMAL
442 # define ZFCP_LOG_NORMAL(fmt, args...)
443 #else
444 # define ZFCP_LOG_NORMAL(fmt, args...) \
445 do { \
446 if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_NORMAL)) \
447 printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \
448 } while (0)
449 #endif
450
451 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_INFO
452 # define ZFCP_LOG_INFO(fmt, args...)
453 #else
454 # define ZFCP_LOG_INFO(fmt, args...) \
455 do { \
456 if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_INFO)) \
457 printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \
458 } while (0)
459 #endif
460
461 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_DEBUG
462 # define ZFCP_LOG_DEBUG(fmt, args...)
463 #else
464 # define ZFCP_LOG_DEBUG(fmt, args...) \
465 ZFCP_LOG(ZFCP_LOG_LEVEL_DEBUG, fmt , ##args)
466 #endif
467
468 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_TRACE
469 # define ZFCP_LOG_TRACE(fmt, args...)
470 #else
471 # define ZFCP_LOG_TRACE(fmt, args...) \
472 ZFCP_LOG(ZFCP_LOG_LEVEL_TRACE, fmt , ##args)
473 #endif
474
475 #ifndef ZFCP_PRINT_FLAGS
476 # define ZFCP_LOG_FLAGS(level, fmt, args...)
477 #else
478 extern u32 flags_dump;
479 # define ZFCP_LOG_FLAGS(level, fmt, args...) \
480 do { \
481 if (level <= flags_dump) \
482 _ZFCP_LOG(fmt, ##args); \
483 } while (0)
484 #endif
485
486 /*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/
487
488 /*
489 * Note, the leftmost status byte is common among adapter, port
490 * and unit
491 */
492 #define ZFCP_COMMON_FLAGS 0xfff00000
493 #define ZFCP_SPECIFIC_FLAGS 0x000fffff
494
495 /* common status bits */
496 #define ZFCP_STATUS_COMMON_REMOVE 0x80000000
497 #define ZFCP_STATUS_COMMON_RUNNING 0x40000000
498 #define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000
499 #define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000
500 #define ZFCP_STATUS_COMMON_OPENING 0x08000000
501 #define ZFCP_STATUS_COMMON_OPEN 0x04000000
502 #define ZFCP_STATUS_COMMON_CLOSING 0x02000000
503 #define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000
504 #define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000
505
506 /* adapter status */
507 #define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002
508 #define ZFCP_STATUS_ADAPTER_REGISTERED 0x00000004
509 #define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008
510 #define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010
511 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_UP 0x00000020
512 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL 0x00000080
513 #define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100
514 #define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200
515
516 #define ZFCP_STATUS_ADAPTER_SCSI_UP \
517 (ZFCP_STATUS_COMMON_UNBLOCKED | \
518 ZFCP_STATUS_ADAPTER_REGISTERED)
519
520
521 /* FC-PH/FC-GS well-known address identifiers for generic services */
522 #define ZFCP_DID_MANAGEMENT_SERVICE 0xFFFFFA
523 #define ZFCP_DID_TIME_SERVICE 0xFFFFFB
524 #define ZFCP_DID_DIRECTORY_SERVICE 0xFFFFFC
525 #define ZFCP_DID_ALIAS_SERVICE 0xFFFFF8
526 #define ZFCP_DID_KEY_DISTRIBUTION_SERVICE 0xFFFFF7
527
528 /* remote port status */
529 #define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001
530 #define ZFCP_STATUS_PORT_DID_DID 0x00000002
531 #define ZFCP_STATUS_PORT_PHYS_CLOSING 0x00000004
532 #define ZFCP_STATUS_PORT_NO_WWPN 0x00000008
533 #define ZFCP_STATUS_PORT_NO_SCSI_ID 0x00000010
534 #define ZFCP_STATUS_PORT_INVALID_WWPN 0x00000020
535 #define ZFCP_STATUS_PORT_ACCESS_DENIED 0x00000040
536
537 /* for ports with well known addresses */
538 #define ZFCP_STATUS_PORT_WKA \
539 (ZFCP_STATUS_PORT_NO_WWPN | \
540 ZFCP_STATUS_PORT_NO_SCSI_ID)
541
542 /* logical unit status */
543 #define ZFCP_STATUS_UNIT_NOTSUPPUNITRESET 0x00000001
544 #define ZFCP_STATUS_UNIT_TEMPORARY 0x00000002
545 #define ZFCP_STATUS_UNIT_SHARED 0x00000004
546 #define ZFCP_STATUS_UNIT_READONLY 0x00000008
547
548 /* FSF request status (this does not have a common part) */
549 #define ZFCP_STATUS_FSFREQ_NOT_INIT 0x00000000
550 #define ZFCP_STATUS_FSFREQ_POOL 0x00000001
551 #define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT 0x00000002
552 #define ZFCP_STATUS_FSFREQ_COMPLETED 0x00000004
553 #define ZFCP_STATUS_FSFREQ_ERROR 0x00000008
554 #define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010
555 #define ZFCP_STATUS_FSFREQ_ABORTING 0x00000020
556 #define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040
557 #define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080
558 #define ZFCP_STATUS_FSFREQ_ABORTED 0x00000100
559 #define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200
560 #define ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP 0x00000400
561 #define ZFCP_STATUS_FSFREQ_RETRY 0x00000800
562 #define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000
563
564 /*********************** ERROR RECOVERY PROCEDURE DEFINES ********************/
565
566 #define ZFCP_MAX_ERPS 3
567
568 #define ZFCP_ERP_FSFREQ_TIMEOUT (30 * HZ)
569 #define ZFCP_ERP_MEMWAIT_TIMEOUT HZ
570
571 #define ZFCP_STATUS_ERP_TIMEDOUT 0x10000000
572 #define ZFCP_STATUS_ERP_CLOSE_ONLY 0x01000000
573 #define ZFCP_STATUS_ERP_DISMISSING 0x00100000
574 #define ZFCP_STATUS_ERP_DISMISSED 0x00200000
575 #define ZFCP_STATUS_ERP_LOWMEM 0x00400000
576
577 #define ZFCP_ERP_STEP_UNINITIALIZED 0x00000000
578 #define ZFCP_ERP_STEP_FSF_XCONFIG 0x00000001
579 #define ZFCP_ERP_STEP_PHYS_PORT_CLOSING 0x00000010
580 #define ZFCP_ERP_STEP_PORT_CLOSING 0x00000100
581 #define ZFCP_ERP_STEP_NAMESERVER_OPEN 0x00000200
582 #define ZFCP_ERP_STEP_NAMESERVER_LOOKUP 0x00000400
583 #define ZFCP_ERP_STEP_PORT_OPENING 0x00000800
584 #define ZFCP_ERP_STEP_UNIT_CLOSING 0x00001000
585 #define ZFCP_ERP_STEP_UNIT_OPENING 0x00002000
586
587 /* Ordered by escalation level (necessary for proper erp-code operation) */
588 #define ZFCP_ERP_ACTION_REOPEN_ADAPTER 0x4
589 #define ZFCP_ERP_ACTION_REOPEN_PORT_FORCED 0x3
590 #define ZFCP_ERP_ACTION_REOPEN_PORT 0x2
591 #define ZFCP_ERP_ACTION_REOPEN_UNIT 0x1
592
593 #define ZFCP_ERP_ACTION_RUNNING 0x1
594 #define ZFCP_ERP_ACTION_READY 0x2
595
596 #define ZFCP_ERP_SUCCEEDED 0x0
597 #define ZFCP_ERP_FAILED 0x1
598 #define ZFCP_ERP_CONTINUES 0x2
599 #define ZFCP_ERP_EXIT 0x3
600 #define ZFCP_ERP_DISMISSED 0x4
601 #define ZFCP_ERP_NOMEM 0x5
602
603
604 /******************** CFDC SPECIFIC STUFF *****************************/
605
606 /* Firewall data channel sense data record */
607 struct zfcp_cfdc_sense_data {
608 u32 signature; /* Request signature */
609 u32 devno; /* FCP adapter device number */
610 u32 command; /* Command code */
611 u32 fsf_status; /* FSF request status and status qualifier */
612 u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE];
613 u8 payloads[256]; /* Access conflicts list */
614 u8 control_file[0]; /* Access control table */
615 };
616
617 #define ZFCP_CFDC_SIGNATURE 0xCFDCACDF
618
619 #define ZFCP_CFDC_CMND_DOWNLOAD_NORMAL 0x00010001
620 #define ZFCP_CFDC_CMND_DOWNLOAD_FORCE 0x00010101
621 #define ZFCP_CFDC_CMND_FULL_ACCESS 0x00000201
622 #define ZFCP_CFDC_CMND_RESTRICTED_ACCESS 0x00000401
623 #define ZFCP_CFDC_CMND_UPLOAD 0x00010002
624
625 #define ZFCP_CFDC_DOWNLOAD 0x00000001
626 #define ZFCP_CFDC_UPLOAD 0x00000002
627 #define ZFCP_CFDC_WITH_CONTROL_FILE 0x00010000
628
629 #define ZFCP_CFDC_DEV_NAME "zfcp_cfdc"
630 #define ZFCP_CFDC_DEV_MAJOR MISC_MAJOR
631 #define ZFCP_CFDC_DEV_MINOR MISC_DYNAMIC_MINOR
632
633 #define ZFCP_CFDC_MAX_CONTROL_FILE_SIZE 127 * 1024
634
635 /************************* STRUCTURE DEFINITIONS *****************************/
636
637 struct zfcp_fsf_req;
638
639 /* holds various memory pools of an adapter */
640 struct zfcp_adapter_mempool {
641 mempool_t *fsf_req_erp;
642 mempool_t *fsf_req_scsi;
643 mempool_t *fsf_req_abort;
644 mempool_t *fsf_req_status_read;
645 mempool_t *data_status_read;
646 mempool_t *data_gid_pn;
647 };
648
649 struct zfcp_exchange_config_data{
650 };
651
652 struct zfcp_open_port {
653 struct zfcp_port *port;
654 };
655
656 struct zfcp_close_port {
657 struct zfcp_port *port;
658 };
659
660 struct zfcp_open_unit {
661 struct zfcp_unit *unit;
662 };
663
664 struct zfcp_close_unit {
665 struct zfcp_unit *unit;
666 };
667
668 struct zfcp_close_physical_port {
669 struct zfcp_port *port;
670 };
671
672 struct zfcp_send_fcp_command_task {
673 struct zfcp_fsf_req *fsf_req;
674 struct zfcp_unit *unit;
675 struct scsi_cmnd *scsi_cmnd;
676 unsigned long start_jiffies;
677 };
678
679 struct zfcp_send_fcp_command_task_management {
680 struct zfcp_unit *unit;
681 };
682
683 struct zfcp_abort_fcp_command {
684 struct zfcp_fsf_req *fsf_req;
685 struct zfcp_unit *unit;
686 };
687
688 /*
689 * header for CT_IU
690 */
691 struct ct_hdr {
692 u8 revision; // 0x01
693 u8 in_id[3]; // 0x00
694 u8 gs_type; // 0xFC Directory Service
695 u8 gs_subtype; // 0x02 Name Server
696 u8 options; // 0x00 single bidirectional exchange
697 u8 reserved0;
698 u16 cmd_rsp_code; // 0x0121 GID_PN, or 0x0100 GA_NXT
699 u16 max_res_size; // <= (4096 - 16) / 4
700 u8 reserved1;
701 u8 reason_code;
702 u8 reason_code_expl;
703 u8 vendor_unique;
704 } __attribute__ ((packed));
705
706 /* nameserver request CT_IU -- for requests where
707 * a port name is required */
708 struct ct_iu_gid_pn_req {
709 struct ct_hdr header;
710 wwn_t wwpn;
711 } __attribute__ ((packed));
712
713 /* FS_ACC IU and data unit for GID_PN nameserver request */
714 struct ct_iu_gid_pn_resp {
715 struct ct_hdr header;
716 fc_id_t d_id;
717 } __attribute__ ((packed));
718
719 typedef void (*zfcp_send_ct_handler_t)(unsigned long);
720
721 /**
722 * struct zfcp_send_ct - used to pass parameters to function zfcp_fsf_send_ct
723 * @port: port where the request is sent to
724 * @req: scatter-gather list for request
725 * @resp: scatter-gather list for response
726 * @req_count: number of elements in request scatter-gather list
727 * @resp_count: number of elements in response scatter-gather list
728 * @handler: handler function (called for response to the request)
729 * @handler_data: data passed to handler function
730 * @pool: pointer to memory pool for ct request structure
731 * @timeout: FSF timeout for this request
732 * @timer: timer (e.g. for request initiated by erp)
733 * @completion: completion for synchronization purposes
734 * @status: used to pass error status to calling function
735 */
736 struct zfcp_send_ct {
737 struct zfcp_port *port;
738 struct scatterlist *req;
739 struct scatterlist *resp;
740 unsigned int req_count;
741 unsigned int resp_count;
742 zfcp_send_ct_handler_t handler;
743 unsigned long handler_data;
744 mempool_t *pool;
745 int timeout;
746 struct timer_list *timer;
747 struct completion *completion;
748 int status;
749 };
750
751 /* used for name server requests in error recovery */
752 struct zfcp_gid_pn_data {
753 struct zfcp_send_ct ct;
754 struct scatterlist req;
755 struct scatterlist resp;
756 struct ct_iu_gid_pn_req ct_iu_req;
757 struct ct_iu_gid_pn_resp ct_iu_resp;
758 struct zfcp_port *port;
759 };
760
761 typedef void (*zfcp_send_els_handler_t)(unsigned long);
762
763 /**
764 * struct zfcp_send_els - used to pass parameters to function zfcp_fsf_send_els
765 * @adapter: adapter where request is sent from
766 * @d_id: destiniation id of port where request is sent to
767 * @req: scatter-gather list for request
768 * @resp: scatter-gather list for response
769 * @req_count: number of elements in request scatter-gather list
770 * @resp_count: number of elements in response scatter-gather list
771 * @handler: handler function (called for response to the request)
772 * @handler_data: data passed to handler function
773 * @timer: timer (e.g. for request initiated by erp)
774 * @completion: completion for synchronization purposes
775 * @ls_code: hex code of ELS command
776 * @status: used to pass error status to calling function
777 */
778 struct zfcp_send_els {
779 struct zfcp_adapter *adapter;
780 fc_id_t d_id;
781 struct scatterlist *req;
782 struct scatterlist *resp;
783 unsigned int req_count;
784 unsigned int resp_count;
785 zfcp_send_els_handler_t handler;
786 unsigned long handler_data;
787 struct timer_list *timer;
788 struct completion *completion;
789 int ls_code;
790 int status;
791 };
792
793 struct zfcp_status_read {
794 struct fsf_status_read_buffer *buffer;
795 };
796
797 struct zfcp_fsf_done {
798 struct completion *complete;
799 int status;
800 };
801
802 /* request specific data */
803 union zfcp_req_data {
804 struct zfcp_exchange_config_data exchange_config_data;
805 struct zfcp_open_port open_port;
806 struct zfcp_close_port close_port;
807 struct zfcp_open_unit open_unit;
808 struct zfcp_close_unit close_unit;
809 struct zfcp_close_physical_port close_physical_port;
810 struct zfcp_send_fcp_command_task send_fcp_command_task;
811 struct zfcp_send_fcp_command_task_management
812 send_fcp_command_task_management;
813 struct zfcp_abort_fcp_command abort_fcp_command;
814 struct zfcp_send_ct *send_ct;
815 struct zfcp_send_els *send_els;
816 struct zfcp_status_read status_read;
817 struct fsf_qtcb_bottom_port *port_data;
818 };
819
820 struct zfcp_qdio_queue {
821 struct qdio_buffer *buffer[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */
822 u8 free_index; /* index of next free bfr
823 in queue (free_count>0) */
824 atomic_t free_count; /* number of free buffers
825 in queue */
826 rwlock_t queue_lock; /* lock for operations on queue */
827 int distance_from_int; /* SBALs used since PCI indication
828 was last set */
829 };
830
831 struct zfcp_erp_action {
832 struct list_head list;
833 int action; /* requested action code */
834 struct zfcp_adapter *adapter; /* device which should be recovered */
835 struct zfcp_port *port;
836 struct zfcp_unit *unit;
837 volatile u32 status; /* recovery status */
838 u32 step; /* active step of this erp action */
839 struct zfcp_fsf_req *fsf_req; /* fsf request currently pending
840 for this action */
841 struct timer_list timer;
842 };
843
844
845 struct zfcp_adapter {
846 struct list_head list; /* list of adapters */
847 atomic_t refcount; /* reference count */
848 wait_queue_head_t remove_wq; /* can be used to wait for
849 refcount drop to zero */
850 wwn_t wwnn; /* WWNN */
851 wwn_t wwpn; /* WWPN */
852 fc_id_t s_id; /* N_Port ID */
853 wwn_t peer_wwnn; /* P2P peer WWNN */
854 wwn_t peer_wwpn; /* P2P peer WWPN */
855 fc_id_t peer_d_id; /* P2P peer D_ID */
856 struct ccw_device *ccw_device; /* S/390 ccw device */
857 u8 fc_service_class;
858 u32 fc_topology; /* FC topology */
859 u32 fc_link_speed; /* FC interface speed */
860 u32 hydra_version; /* Hydra version */
861 u32 fsf_lic_version;
862 u32 supported_features;/* of FCP channel */
863 u32 hardware_version; /* of FCP channel */
864 u8 serial_number[32]; /* of hardware */
865 struct Scsi_Host *scsi_host; /* Pointer to mid-layer */
866 unsigned short scsi_host_no; /* Assigned host number */
867 unsigned char name[9];
868 struct list_head port_list_head; /* remote port list */
869 struct list_head port_remove_lh; /* head of ports to be
870 removed */
871 u32 ports; /* number of remote ports */
872 struct timer_list scsi_er_timer; /* SCSI err recovery watch */
873 struct list_head fsf_req_list_head; /* head of FSF req list */
874 rwlock_t fsf_req_list_lock; /* lock for ops on list of
875 FSF requests */
876 atomic_t fsf_reqs_active; /* # active FSF reqs */
877 struct zfcp_qdio_queue request_queue; /* request queue */
878 u32 fsf_req_seq_no; /* FSF cmnd seq number */
879 wait_queue_head_t request_wq; /* can be used to wait for
880 more avaliable SBALs */
881 struct zfcp_qdio_queue response_queue; /* response queue */
882 rwlock_t abort_lock; /* Protects against SCSI
883 stack abort/command
884 completion races */
885 u16 status_read_failed; /* # failed status reads */
886 atomic_t status; /* status of this adapter */
887 struct list_head erp_ready_head; /* error recovery for this
888 adapter/devices */
889 struct list_head erp_running_head;
890 rwlock_t erp_lock;
891 struct semaphore erp_ready_sem;
892 wait_queue_head_t erp_thread_wqh;
893 wait_queue_head_t erp_done_wqh;
894 struct zfcp_erp_action erp_action; /* pending error recovery */
895 atomic_t erp_counter;
896 u32 erp_total_count; /* total nr of enqueued erp
897 actions */
898 u32 erp_low_mem_count; /* nr of erp actions waiting
899 for memory */
900 struct zfcp_port *nameserver_port; /* adapter's nameserver */
901 debug_info_t *erp_dbf; /* S/390 debug features */
902 debug_info_t *abort_dbf;
903 debug_info_t *in_els_dbf;
904 debug_info_t *cmd_dbf;
905 spinlock_t dbf_lock;
906 struct zfcp_adapter_mempool pool; /* Adapter memory pools */
907 struct qdio_initialize qdio_init_data; /* for qdio_establish */
908 struct device generic_services; /* directory for WKA ports */
909 };
910
911 /*
912 * the struct device sysfs_device must be at the beginning of this structure.
913 * pointer to struct device is used to free port structure in release function
914 * of the device. don't change!
915 */
916 struct zfcp_port {
917 struct device sysfs_device; /* sysfs device */
918 struct list_head list; /* list of remote ports */
919 atomic_t refcount; /* reference count */
920 wait_queue_head_t remove_wq; /* can be used to wait for
921 refcount drop to zero */
922 struct zfcp_adapter *adapter; /* adapter used to access port */
923 struct list_head unit_list_head; /* head of logical unit list */
924 struct list_head unit_remove_lh; /* head of luns to be removed
925 list */
926 u32 units; /* # of logical units in list */
927 atomic_t status; /* status of this remote port */
928 scsi_id_t scsi_id; /* own SCSI ID */
929 wwn_t wwnn; /* WWNN if known */
930 wwn_t wwpn; /* WWPN */
931 fc_id_t d_id; /* D_ID */
932 u32 handle; /* handle assigned by FSF */
933 struct zfcp_erp_action erp_action; /* pending error recovery */
934 atomic_t erp_counter;
935 };
936
937 /* the struct device sysfs_device must be at the beginning of this structure.
938 * pointer to struct device is used to free unit structure in release function
939 * of the device. don't change!
940 */
941 struct zfcp_unit {
942 struct device sysfs_device; /* sysfs device */
943 struct list_head list; /* list of logical units */
944 atomic_t refcount; /* reference count */
945 wait_queue_head_t remove_wq; /* can be used to wait for
946 refcount drop to zero */
947 struct zfcp_port *port; /* remote port of unit */
948 atomic_t status; /* status of this logical unit */
949 scsi_lun_t scsi_lun; /* own SCSI LUN */
950 fcp_lun_t fcp_lun; /* own FCP_LUN */
951 u32 handle; /* handle assigned by FSF */
952 struct scsi_device *device; /* scsi device struct pointer */
953 struct zfcp_erp_action erp_action; /* pending error recovery */
954 atomic_t erp_counter;
955 };
956
957 /* FSF request */
958 struct zfcp_fsf_req {
959 struct list_head list; /* list of FSF requests */
960 struct zfcp_adapter *adapter; /* adapter request belongs to */
961 u8 sbal_number; /* nr of SBALs free for use */
962 u8 sbal_first; /* first SBAL for this request */
963 u8 sbal_last; /* last possible SBAL for
964 this reuest */
965 u8 sbal_curr; /* current SBAL during creation
966 of request */
967 u8 sbale_curr; /* current SBALE during creation
968 of request */
969 wait_queue_head_t completion_wq; /* can be used by a routine
970 to wait for completion */
971 volatile u32 status; /* status of this request */
972 u32 fsf_command; /* FSF Command copy */
973 struct fsf_qtcb *qtcb; /* address of associated QTCB */
974 u32 seq_no; /* Sequence number of request */
975 union zfcp_req_data data; /* Info fields of request */
976 struct zfcp_erp_action *erp_action; /* used if this request is
977 issued on behalf of erp */
978 mempool_t *pool; /* used if request was alloacted
979 from emergency pool */
980 };
981
982 typedef void zfcp_fsf_req_handler_t(struct zfcp_fsf_req*);
983
984 /* driver data */
985 struct zfcp_data {
986 struct scsi_host_template scsi_host_template;
987 atomic_t status; /* Module status flags */
988 struct list_head adapter_list_head; /* head of adapter list */
989 struct list_head adapter_remove_lh; /* head of adapters to be
990 removed */
991 rwlock_t status_read_lock; /* for status read thread */
992 struct list_head status_read_receive_head;
993 struct list_head status_read_send_head;
994 struct semaphore status_read_sema;
995 wait_queue_head_t status_read_thread_wqh;
996 u32 adapters; /* # of adapters in list */
997 rwlock_t config_lock; /* serialises changes
998 to adapter/port/unit
999 lists */
1000 struct semaphore config_sema; /* serialises configuration
1001 changes */
1002 atomic_t loglevel; /* current loglevel */
1003 char init_busid[BUS_ID_SIZE];
1004 wwn_t init_wwpn;
1005 fcp_lun_t init_fcp_lun;
1006 char *driver_version;
1007 };
1008
1009 /**
1010 * struct zfcp_sg_list - struct describing a scatter-gather list
1011 * @sg: pointer to array of (struct scatterlist)
1012 * @count: number of elements in scatter-gather list
1013 */
1014 struct zfcp_sg_list {
1015 struct scatterlist *sg;
1016 unsigned int count;
1017 };
1018
1019 /* number of elements for various memory pools */
1020 #define ZFCP_POOL_FSF_REQ_ERP_NR 1
1021 #define ZFCP_POOL_FSF_REQ_SCSI_NR 1
1022 #define ZFCP_POOL_FSF_REQ_ABORT_NR 1
1023 #define ZFCP_POOL_STATUS_READ_NR ZFCP_STATUS_READS_RECOM
1024 #define ZFCP_POOL_DATA_GID_PN_NR 1
1025
1026 /* struct used by memory pools for fsf_requests */
1027 struct zfcp_fsf_req_pool_element {
1028 struct zfcp_fsf_req fsf_req;
1029 struct fsf_qtcb qtcb;
1030 };
1031
1032 /********************** ZFCP SPECIFIC DEFINES ********************************/
1033
1034 #define ZFCP_FSFREQ_CLEANUP_TIMEOUT HZ/10
1035
1036 #define ZFCP_KNOWN 0x00000001
1037 #define ZFCP_REQ_AUTO_CLEANUP 0x00000002
1038 #define ZFCP_WAIT_FOR_SBAL 0x00000004
1039 #define ZFCP_REQ_NO_QTCB 0x00000008
1040
1041 #define ZFCP_SET 0x00000100
1042 #define ZFCP_CLEAR 0x00000200
1043
1044 #define ZFCP_INTERRUPTIBLE 1
1045 #define ZFCP_UNINTERRUPTIBLE 0
1046
1047 #ifndef atomic_test_mask
1048 #define atomic_test_mask(mask, target) \
1049 ((atomic_read(target) & mask) == mask)
1050 #endif
1051
1052 extern void _zfcp_hex_dump(char *, int);
1053 #define ZFCP_HEX_DUMP(level, addr, count) \
1054 if (ZFCP_LOG_CHECK(level)) { \
1055 _zfcp_hex_dump(addr, count); \
1056 }
1057
1058 #define zfcp_get_busid_by_adapter(adapter) (adapter->ccw_device->dev.bus_id)
1059 #define zfcp_get_busid_by_port(port) (zfcp_get_busid_by_adapter(port->adapter))
1060 #define zfcp_get_busid_by_unit(unit) (zfcp_get_busid_by_port(unit->port))
1061
1062 /*
1063 * functions needed for reference/usage counting
1064 */
1065
1066 static inline void
1067 zfcp_unit_get(struct zfcp_unit *unit)
1068 {
1069 atomic_inc(&unit->refcount);
1070 }
1071
1072 static inline void
1073 zfcp_unit_put(struct zfcp_unit *unit)
1074 {
1075 if (atomic_dec_return(&unit->refcount) == 0)
1076 wake_up(&unit->remove_wq);
1077 }
1078
1079 static inline void
1080 zfcp_unit_wait(struct zfcp_unit *unit)
1081 {
1082 wait_event(unit->remove_wq, atomic_read(&unit->refcount) == 0);
1083 }
1084
1085 static inline void
1086 zfcp_port_get(struct zfcp_port *port)
1087 {
1088 atomic_inc(&port->refcount);
1089 }
1090
1091 static inline void
1092 zfcp_port_put(struct zfcp_port *port)
1093 {
1094 if (atomic_dec_return(&port->refcount) == 0)
1095 wake_up(&port->remove_wq);
1096 }
1097
1098 static inline void
1099 zfcp_port_wait(struct zfcp_port *port)
1100 {
1101 wait_event(port->remove_wq, atomic_read(&port->refcount) == 0);
1102 }
1103
1104 static inline void
1105 zfcp_adapter_get(struct zfcp_adapter *adapter)
1106 {
1107 atomic_inc(&adapter->refcount);
1108 }
1109
1110 static inline void
1111 zfcp_adapter_put(struct zfcp_adapter *adapter)
1112 {
1113 if (atomic_dec_return(&adapter->refcount) == 0)
1114 wake_up(&adapter->remove_wq);
1115 }
1116
1117 static inline void
1118 zfcp_adapter_wait(struct zfcp_adapter *adapter)
1119 {
1120 wait_event(adapter->remove_wq, atomic_read(&adapter->refcount) == 0);
1121 }
1122
1123 #endif /* ZFCP_DEF_H */
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