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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy...
[deliverable/linux.git] / drivers / s390 / scsi / zfcp_def.h
1 /*
2 * This file is part of the zfcp device driver for
3 * FCP adapters for IBM System z9 and zSeries.
4 *
5 * (C) Copyright IBM Corp. 2002, 2006
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22 #ifndef ZFCP_DEF_H
23 #define ZFCP_DEF_H
24
25 /*************************** INCLUDES *****************************************/
26
27 #include <linux/init.h>
28 #include <linux/moduleparam.h>
29 #include <linux/miscdevice.h>
30 #include <linux/major.h>
31 #include <linux/blkdev.h>
32 #include <linux/delay.h>
33 #include <linux/timer.h>
34 #include <linux/slab.h>
35 #include <linux/mempool.h>
36 #include <linux/syscalls.h>
37 #include <linux/ioctl.h>
38 #include <scsi/scsi.h>
39 #include <scsi/scsi_tcq.h>
40 #include <scsi/scsi_cmnd.h>
41 #include <scsi/scsi_device.h>
42 #include <scsi/scsi_host.h>
43 #include <scsi/scsi_transport.h>
44 #include <scsi/scsi_transport_fc.h>
45 #include <asm/ccwdev.h>
46 #include <asm/qdio.h>
47 #include <asm/debug.h>
48 #include <asm/ebcdic.h>
49 #include "zfcp_fsf.h"
50
51
52 /********************* GENERAL DEFINES *********************************/
53
54 /* zfcp version number, it consists of major, minor, and patch-level number */
55 #define ZFCP_VERSION "4.8.0"
56
57 /**
58 * zfcp_sg_to_address - determine kernel address from struct scatterlist
59 * @list: struct scatterlist
60 * Return: kernel address
61 */
62 static inline void *
63 zfcp_sg_to_address(struct scatterlist *list)
64 {
65 return (void *) (page_address(list->page) + list->offset);
66 }
67
68 /**
69 * zfcp_address_to_sg - set up struct scatterlist from kernel address
70 * @address: kernel address
71 * @list: struct scatterlist
72 */
73 static inline void
74 zfcp_address_to_sg(void *address, struct scatterlist *list)
75 {
76 list->page = virt_to_page(address);
77 list->offset = ((unsigned long) address) & (PAGE_SIZE - 1);
78 }
79
80 #define REQUEST_LIST_SIZE 128
81
82 /********************* SCSI SPECIFIC DEFINES *********************************/
83 #define ZFCP_SCSI_ER_TIMEOUT (10*HZ)
84
85 /********************* CIO/QDIO SPECIFIC DEFINES *****************************/
86
87 /* Adapter Identification Parameters */
88 #define ZFCP_CONTROL_UNIT_TYPE 0x1731
89 #define ZFCP_CONTROL_UNIT_MODEL 0x03
90 #define ZFCP_DEVICE_TYPE 0x1732
91 #define ZFCP_DEVICE_MODEL 0x03
92 #define ZFCP_DEVICE_MODEL_PRIV 0x04
93
94 /* allow as many chained SBALs as are supported by hardware */
95 #define ZFCP_MAX_SBALS_PER_REQ FSF_MAX_SBALS_PER_REQ
96 #define ZFCP_MAX_SBALS_PER_CT_REQ FSF_MAX_SBALS_PER_REQ
97 #define ZFCP_MAX_SBALS_PER_ELS_REQ FSF_MAX_SBALS_PER_ELS_REQ
98
99 /* DMQ bug workaround: don't use last SBALE */
100 #define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
101
102 /* index of last SBALE (with respect to DMQ bug workaround) */
103 #define ZFCP_LAST_SBALE_PER_SBAL (ZFCP_MAX_SBALES_PER_SBAL - 1)
104
105 /* max. number of (data buffer) SBALEs in largest SBAL chain */
106 #define ZFCP_MAX_SBALES_PER_REQ \
107 (ZFCP_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2)
108 /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */
109
110 #define ZFCP_MAX_SECTORS (ZFCP_MAX_SBALES_PER_REQ * 8)
111 /* max. number of (data buffer) SBALEs in largest SBAL chain
112 multiplied with number of sectors per 4k block */
113
114 /* FIXME(tune): free space should be one max. SBAL chain plus what? */
115 #define ZFCP_QDIO_PCI_INTERVAL (QDIO_MAX_BUFFERS_PER_Q \
116 - (ZFCP_MAX_SBALS_PER_REQ + 4))
117
118 #define ZFCP_SBAL_TIMEOUT (5*HZ)
119
120 #define ZFCP_TYPE2_RECOVERY_TIME (8*HZ)
121
122 /* queue polling (values in microseconds) */
123 #define ZFCP_MAX_INPUT_THRESHOLD 5000 /* FIXME: tune */
124 #define ZFCP_MAX_OUTPUT_THRESHOLD 1000 /* FIXME: tune */
125 #define ZFCP_MIN_INPUT_THRESHOLD 1 /* ignored by QDIO layer */
126 #define ZFCP_MIN_OUTPUT_THRESHOLD 1 /* ignored by QDIO layer */
127
128 #define QDIO_SCSI_QFMT 1 /* 1 for FSF */
129
130 /********************* FSF SPECIFIC DEFINES *********************************/
131
132 #define ZFCP_ULP_INFO_VERSION 26
133 #define ZFCP_QTCB_VERSION FSF_QTCB_CURRENT_VERSION
134 /* ATTENTION: value must not be used by hardware */
135 #define FSF_QTCB_UNSOLICITED_STATUS 0x6305
136 #define ZFCP_STATUS_READ_FAILED_THRESHOLD 3
137 #define ZFCP_STATUS_READS_RECOM FSF_STATUS_READS_RECOM
138
139 /* Do 1st retry in 1 second, then double the timeout for each following retry */
140 #define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP 100
141 #define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES 7
142
143 /* timeout value for "default timer" for fsf requests */
144 #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ)
145
146 /*************** FIBRE CHANNEL PROTOCOL SPECIFIC DEFINES ********************/
147
148 typedef unsigned long long wwn_t;
149 typedef unsigned long long fcp_lun_t;
150 /* data length field may be at variable position in FCP-2 FCP_CMND IU */
151 typedef unsigned int fcp_dl_t;
152
153 #define ZFCP_FC_SERVICE_CLASS_DEFAULT FSF_CLASS_3
154
155 /* timeout for name-server lookup (in seconds) */
156 #define ZFCP_NS_GID_PN_TIMEOUT 10
157
158 /* largest SCSI command we can process */
159 /* FCP-2 (FCP_CMND IU) allows up to (255-3+16) */
160 #define ZFCP_MAX_SCSI_CMND_LENGTH 255
161 /* maximum number of commands in LUN queue (tagged queueing) */
162 #define ZFCP_CMND_PER_LUN 32
163
164 /* task attribute values in FCP-2 FCP_CMND IU */
165 #define SIMPLE_Q 0
166 #define HEAD_OF_Q 1
167 #define ORDERED_Q 2
168 #define ACA_Q 4
169 #define UNTAGGED 5
170
171 /* task management flags in FCP-2 FCP_CMND IU */
172 #define FCP_CLEAR_ACA 0x40
173 #define FCP_TARGET_RESET 0x20
174 #define FCP_LOGICAL_UNIT_RESET 0x10
175 #define FCP_CLEAR_TASK_SET 0x04
176 #define FCP_ABORT_TASK_SET 0x02
177
178 #define FCP_CDB_LENGTH 16
179
180 #define ZFCP_DID_MASK 0x00FFFFFF
181
182 /* FCP(-2) FCP_CMND IU */
183 struct fcp_cmnd_iu {
184 fcp_lun_t fcp_lun; /* FCP logical unit number */
185 u8 crn; /* command reference number */
186 u8 reserved0:5; /* reserved */
187 u8 task_attribute:3; /* task attribute */
188 u8 task_management_flags; /* task management flags */
189 u8 add_fcp_cdb_length:6; /* additional FCP_CDB length */
190 u8 rddata:1; /* read data */
191 u8 wddata:1; /* write data */
192 u8 fcp_cdb[FCP_CDB_LENGTH];
193 } __attribute__((packed));
194
195 /* FCP(-2) FCP_RSP IU */
196 struct fcp_rsp_iu {
197 u8 reserved0[10];
198 union {
199 struct {
200 u8 reserved1:3;
201 u8 fcp_conf_req:1;
202 u8 fcp_resid_under:1;
203 u8 fcp_resid_over:1;
204 u8 fcp_sns_len_valid:1;
205 u8 fcp_rsp_len_valid:1;
206 } bits;
207 u8 value;
208 } validity;
209 u8 scsi_status;
210 u32 fcp_resid;
211 u32 fcp_sns_len;
212 u32 fcp_rsp_len;
213 } __attribute__((packed));
214
215
216 #define RSP_CODE_GOOD 0
217 #define RSP_CODE_LENGTH_MISMATCH 1
218 #define RSP_CODE_FIELD_INVALID 2
219 #define RSP_CODE_RO_MISMATCH 3
220 #define RSP_CODE_TASKMAN_UNSUPP 4
221 #define RSP_CODE_TASKMAN_FAILED 5
222
223 /* see fc-fs */
224 #define LS_RSCN 0x61040000
225 #define LS_LOGO 0x05000000
226 #define LS_PLOGI 0x03000000
227
228 struct fcp_rscn_head {
229 u8 command;
230 u8 page_length; /* always 0x04 */
231 u16 payload_len;
232 } __attribute__((packed));
233
234 struct fcp_rscn_element {
235 u8 reserved:2;
236 u8 event_qual:4;
237 u8 addr_format:2;
238 u32 nport_did:24;
239 } __attribute__((packed));
240
241 #define ZFCP_PORT_ADDRESS 0x0
242 #define ZFCP_AREA_ADDRESS 0x1
243 #define ZFCP_DOMAIN_ADDRESS 0x2
244 #define ZFCP_FABRIC_ADDRESS 0x3
245
246 #define ZFCP_PORTS_RANGE_PORT 0xFFFFFF
247 #define ZFCP_PORTS_RANGE_AREA 0xFFFF00
248 #define ZFCP_PORTS_RANGE_DOMAIN 0xFF0000
249 #define ZFCP_PORTS_RANGE_FABRIC 0x000000
250
251 #define ZFCP_NO_PORTS_PER_AREA 0x100
252 #define ZFCP_NO_PORTS_PER_DOMAIN 0x10000
253 #define ZFCP_NO_PORTS_PER_FABRIC 0x1000000
254
255 /* see fc-ph */
256 struct fcp_logo {
257 u32 command;
258 u32 nport_did;
259 wwn_t nport_wwpn;
260 } __attribute__((packed));
261
262 /*
263 * DBF stuff
264 */
265 #define ZFCP_DBF_TAG_SIZE 4
266
267 struct zfcp_dbf_dump {
268 u8 tag[ZFCP_DBF_TAG_SIZE];
269 u32 total_size; /* size of total dump data */
270 u32 offset; /* how much data has being already dumped */
271 u32 size; /* how much data comes with this record */
272 u8 data[]; /* dump data */
273 } __attribute__ ((packed));
274
275 /* FIXME: to be inflated when reworking the erp dbf */
276 struct zfcp_erp_dbf_record {
277 u8 dummy[16];
278 } __attribute__ ((packed));
279
280 struct zfcp_hba_dbf_record_response {
281 u32 fsf_command;
282 u64 fsf_reqid;
283 u32 fsf_seqno;
284 u64 fsf_issued;
285 u32 fsf_prot_status;
286 u32 fsf_status;
287 u8 fsf_prot_status_qual[FSF_PROT_STATUS_QUAL_SIZE];
288 u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE];
289 u32 fsf_req_status;
290 u8 sbal_first;
291 u8 sbal_curr;
292 u8 sbal_last;
293 u8 pool;
294 u64 erp_action;
295 union {
296 struct {
297 u64 scsi_cmnd;
298 u64 scsi_serial;
299 } send_fcp;
300 struct {
301 u64 wwpn;
302 u32 d_id;
303 u32 port_handle;
304 } port;
305 struct {
306 u64 wwpn;
307 u64 fcp_lun;
308 u32 port_handle;
309 u32 lun_handle;
310 } unit;
311 struct {
312 u32 d_id;
313 u8 ls_code;
314 } send_els;
315 } data;
316 } __attribute__ ((packed));
317
318 struct zfcp_hba_dbf_record_status {
319 u8 failed;
320 u32 status_type;
321 u32 status_subtype;
322 struct fsf_queue_designator
323 queue_designator;
324 u32 payload_size;
325 #define ZFCP_DBF_UNSOL_PAYLOAD 80
326 #define ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL 32
327 #define ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD 56
328 #define ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT 2 * sizeof(u32)
329 u8 payload[ZFCP_DBF_UNSOL_PAYLOAD];
330 } __attribute__ ((packed));
331
332 struct zfcp_hba_dbf_record_qdio {
333 u32 status;
334 u32 qdio_error;
335 u32 siga_error;
336 u8 sbal_index;
337 u8 sbal_count;
338 } __attribute__ ((packed));
339
340 struct zfcp_hba_dbf_record {
341 u8 tag[ZFCP_DBF_TAG_SIZE];
342 u8 tag2[ZFCP_DBF_TAG_SIZE];
343 union {
344 struct zfcp_hba_dbf_record_response response;
345 struct zfcp_hba_dbf_record_status status;
346 struct zfcp_hba_dbf_record_qdio qdio;
347 } type;
348 } __attribute__ ((packed));
349
350 struct zfcp_san_dbf_record_ct {
351 union {
352 struct {
353 u16 cmd_req_code;
354 u8 revision;
355 u8 gs_type;
356 u8 gs_subtype;
357 u8 options;
358 u16 max_res_size;
359 } request;
360 struct {
361 u16 cmd_rsp_code;
362 u8 revision;
363 u8 reason_code;
364 u8 reason_code_expl;
365 u8 vendor_unique;
366 } response;
367 } type;
368 u32 payload_size;
369 #define ZFCP_DBF_CT_PAYLOAD 24
370 u8 payload[ZFCP_DBF_CT_PAYLOAD];
371 } __attribute__ ((packed));
372
373 struct zfcp_san_dbf_record_els {
374 u8 ls_code;
375 u32 payload_size;
376 #define ZFCP_DBF_ELS_PAYLOAD 32
377 #define ZFCP_DBF_ELS_MAX_PAYLOAD 1024
378 u8 payload[ZFCP_DBF_ELS_PAYLOAD];
379 } __attribute__ ((packed));
380
381 struct zfcp_san_dbf_record {
382 u8 tag[ZFCP_DBF_TAG_SIZE];
383 u64 fsf_reqid;
384 u32 fsf_seqno;
385 u32 s_id;
386 u32 d_id;
387 union {
388 struct zfcp_san_dbf_record_ct ct;
389 struct zfcp_san_dbf_record_els els;
390 } type;
391 } __attribute__ ((packed));
392
393 struct zfcp_scsi_dbf_record {
394 u8 tag[ZFCP_DBF_TAG_SIZE];
395 u8 tag2[ZFCP_DBF_TAG_SIZE];
396 u32 scsi_id;
397 u32 scsi_lun;
398 u32 scsi_result;
399 u64 scsi_cmnd;
400 u64 scsi_serial;
401 #define ZFCP_DBF_SCSI_OPCODE 16
402 u8 scsi_opcode[ZFCP_DBF_SCSI_OPCODE];
403 u8 scsi_retries;
404 u8 scsi_allowed;
405 u64 fsf_reqid;
406 u32 fsf_seqno;
407 u64 fsf_issued;
408 union {
409 u64 old_fsf_reqid;
410 struct {
411 u8 rsp_validity;
412 u8 rsp_scsi_status;
413 u32 rsp_resid;
414 u8 rsp_code;
415 #define ZFCP_DBF_SCSI_FCP_SNS_INFO 16
416 #define ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO 256
417 u32 sns_info_len;
418 u8 sns_info[ZFCP_DBF_SCSI_FCP_SNS_INFO];
419 } fcp;
420 } type;
421 } __attribute__ ((packed));
422
423 /*
424 * FC-FS stuff
425 */
426 #define R_A_TOV 10 /* seconds */
427 #define ZFCP_ELS_TIMEOUT (2 * R_A_TOV)
428
429 #define ZFCP_LS_RLS 0x0f
430 #define ZFCP_LS_ADISC 0x52
431 #define ZFCP_LS_RPS 0x56
432 #define ZFCP_LS_RSCN 0x61
433 #define ZFCP_LS_RNID 0x78
434
435 struct zfcp_ls_rjt_par {
436 u8 action;
437 u8 reason_code;
438 u8 reason_expl;
439 u8 vendor_unique;
440 } __attribute__ ((packed));
441
442 struct zfcp_ls_adisc {
443 u8 code;
444 u8 field[3];
445 u32 hard_nport_id;
446 u64 wwpn;
447 u64 wwnn;
448 u32 nport_id;
449 } __attribute__ ((packed));
450
451 struct zfcp_ls_adisc_acc {
452 u8 code;
453 u8 field[3];
454 u32 hard_nport_id;
455 u64 wwpn;
456 u64 wwnn;
457 u32 nport_id;
458 } __attribute__ ((packed));
459
460 struct zfcp_rc_entry {
461 u8 code;
462 const char *description;
463 };
464
465 /*
466 * FC-GS-2 stuff
467 */
468 #define ZFCP_CT_REVISION 0x01
469 #define ZFCP_CT_DIRECTORY_SERVICE 0xFC
470 #define ZFCP_CT_NAME_SERVER 0x02
471 #define ZFCP_CT_SYNCHRONOUS 0x00
472 #define ZFCP_CT_GID_PN 0x0121
473 #define ZFCP_CT_MAX_SIZE 0x1020
474 #define ZFCP_CT_ACCEPT 0x8002
475 #define ZFCP_CT_REJECT 0x8001
476
477 /*
478 * FC-GS-4 stuff
479 */
480 #define ZFCP_CT_TIMEOUT (3 * R_A_TOV)
481
482 /******************** LOGGING MACROS AND DEFINES *****************************/
483
484 /*
485 * Logging may be applied on certain kinds of driver operations
486 * independently. Additionally, different log-levels are supported for
487 * each of these areas.
488 */
489
490 #define ZFCP_NAME "zfcp"
491
492 /* independent log areas */
493 #define ZFCP_LOG_AREA_OTHER 0
494 #define ZFCP_LOG_AREA_SCSI 1
495 #define ZFCP_LOG_AREA_FSF 2
496 #define ZFCP_LOG_AREA_CONFIG 3
497 #define ZFCP_LOG_AREA_CIO 4
498 #define ZFCP_LOG_AREA_QDIO 5
499 #define ZFCP_LOG_AREA_ERP 6
500 #define ZFCP_LOG_AREA_FC 7
501
502 /* log level values*/
503 #define ZFCP_LOG_LEVEL_NORMAL 0
504 #define ZFCP_LOG_LEVEL_INFO 1
505 #define ZFCP_LOG_LEVEL_DEBUG 2
506 #define ZFCP_LOG_LEVEL_TRACE 3
507
508 /*
509 * this allows removal of logging code by the preprocessor
510 * (the most detailed log level still to be compiled in is specified,
511 * higher log levels are removed)
512 */
513 #define ZFCP_LOG_LEVEL_LIMIT ZFCP_LOG_LEVEL_TRACE
514
515 /* get "loglevel" nibble assignment */
516 #define ZFCP_GET_LOG_VALUE(zfcp_lognibble) \
517 ((atomic_read(&zfcp_data.loglevel) >> (zfcp_lognibble<<2)) & 0xF)
518
519 /* set "loglevel" nibble */
520 #define ZFCP_SET_LOG_NIBBLE(value, zfcp_lognibble) \
521 (value << (zfcp_lognibble << 2))
522
523 /* all log-level defaults are combined to generate initial log-level */
524 #define ZFCP_LOG_LEVEL_DEFAULTS \
525 (ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_OTHER) | \
526 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_SCSI) | \
527 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FSF) | \
528 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CONFIG) | \
529 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CIO) | \
530 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_QDIO) | \
531 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_ERP) | \
532 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FC))
533
534 /* check whether we have the right level for logging */
535 #define ZFCP_LOG_CHECK(level) \
536 ((ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA)) >= level)
537
538 /* logging routine for zfcp */
539 #define _ZFCP_LOG(fmt, args...) \
540 printk(KERN_ERR ZFCP_NAME": %s(%d): " fmt, __FUNCTION__, \
541 __LINE__ , ##args)
542
543 #define ZFCP_LOG(level, fmt, args...) \
544 do { \
545 if (ZFCP_LOG_CHECK(level)) \
546 _ZFCP_LOG(fmt, ##args); \
547 } while (0)
548
549 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_NORMAL
550 # define ZFCP_LOG_NORMAL(fmt, args...) do { } while (0)
551 #else
552 # define ZFCP_LOG_NORMAL(fmt, args...) \
553 do { \
554 if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_NORMAL)) \
555 printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \
556 } while (0)
557 #endif
558
559 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_INFO
560 # define ZFCP_LOG_INFO(fmt, args...) do { } while (0)
561 #else
562 # define ZFCP_LOG_INFO(fmt, args...) \
563 do { \
564 if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_INFO)) \
565 printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \
566 } while (0)
567 #endif
568
569 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_DEBUG
570 # define ZFCP_LOG_DEBUG(fmt, args...) do { } while (0)
571 #else
572 # define ZFCP_LOG_DEBUG(fmt, args...) \
573 ZFCP_LOG(ZFCP_LOG_LEVEL_DEBUG, fmt , ##args)
574 #endif
575
576 #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_TRACE
577 # define ZFCP_LOG_TRACE(fmt, args...) do { } while (0)
578 #else
579 # define ZFCP_LOG_TRACE(fmt, args...) \
580 ZFCP_LOG(ZFCP_LOG_LEVEL_TRACE, fmt , ##args)
581 #endif
582
583 /*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/
584
585 /*
586 * Note, the leftmost status byte is common among adapter, port
587 * and unit
588 */
589 #define ZFCP_COMMON_FLAGS 0xfff00000
590
591 /* common status bits */
592 #define ZFCP_STATUS_COMMON_REMOVE 0x80000000
593 #define ZFCP_STATUS_COMMON_RUNNING 0x40000000
594 #define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000
595 #define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000
596 #define ZFCP_STATUS_COMMON_OPENING 0x08000000
597 #define ZFCP_STATUS_COMMON_OPEN 0x04000000
598 #define ZFCP_STATUS_COMMON_CLOSING 0x02000000
599 #define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000
600 #define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000
601 #define ZFCP_STATUS_COMMON_ACCESS_BOXED 0x00400000
602
603 /* adapter status */
604 #define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002
605 #define ZFCP_STATUS_ADAPTER_REGISTERED 0x00000004
606 #define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008
607 #define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010
608 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_UP 0x00000020
609 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL 0x00000080
610 #define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100
611 #define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200
612 #define ZFCP_STATUS_ADAPTER_XPORT_OK 0x00000800
613
614 /* FC-PH/FC-GS well-known address identifiers for generic services */
615 #define ZFCP_DID_MANAGEMENT_SERVICE 0xFFFFFA
616 #define ZFCP_DID_TIME_SERVICE 0xFFFFFB
617 #define ZFCP_DID_DIRECTORY_SERVICE 0xFFFFFC
618 #define ZFCP_DID_ALIAS_SERVICE 0xFFFFF8
619 #define ZFCP_DID_KEY_DISTRIBUTION_SERVICE 0xFFFFF7
620
621 /* remote port status */
622 #define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001
623 #define ZFCP_STATUS_PORT_DID_DID 0x00000002
624 #define ZFCP_STATUS_PORT_PHYS_CLOSING 0x00000004
625 #define ZFCP_STATUS_PORT_NO_WWPN 0x00000008
626 #define ZFCP_STATUS_PORT_NO_SCSI_ID 0x00000010
627 #define ZFCP_STATUS_PORT_INVALID_WWPN 0x00000020
628
629 /* for ports with well known addresses */
630 #define ZFCP_STATUS_PORT_WKA \
631 (ZFCP_STATUS_PORT_NO_WWPN | \
632 ZFCP_STATUS_PORT_NO_SCSI_ID)
633
634 /* logical unit status */
635 #define ZFCP_STATUS_UNIT_NOTSUPPUNITRESET 0x00000001
636 #define ZFCP_STATUS_UNIT_TEMPORARY 0x00000002
637 #define ZFCP_STATUS_UNIT_SHARED 0x00000004
638 #define ZFCP_STATUS_UNIT_READONLY 0x00000008
639 #define ZFCP_STATUS_UNIT_REGISTERED 0x00000010
640
641 /* FSF request status (this does not have a common part) */
642 #define ZFCP_STATUS_FSFREQ_NOT_INIT 0x00000000
643 #define ZFCP_STATUS_FSFREQ_POOL 0x00000001
644 #define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT 0x00000002
645 #define ZFCP_STATUS_FSFREQ_COMPLETED 0x00000004
646 #define ZFCP_STATUS_FSFREQ_ERROR 0x00000008
647 #define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010
648 #define ZFCP_STATUS_FSFREQ_ABORTING 0x00000020
649 #define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040
650 #define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080
651 #define ZFCP_STATUS_FSFREQ_ABORTED 0x00000100
652 #define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200
653 #define ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP 0x00000400
654 #define ZFCP_STATUS_FSFREQ_RETRY 0x00000800
655 #define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000
656
657 /*********************** ERROR RECOVERY PROCEDURE DEFINES ********************/
658
659 #define ZFCP_MAX_ERPS 3
660
661 #define ZFCP_ERP_FSFREQ_TIMEOUT (30 * HZ)
662 #define ZFCP_ERP_MEMWAIT_TIMEOUT HZ
663
664 #define ZFCP_STATUS_ERP_TIMEDOUT 0x10000000
665 #define ZFCP_STATUS_ERP_CLOSE_ONLY 0x01000000
666 #define ZFCP_STATUS_ERP_DISMISSING 0x00100000
667 #define ZFCP_STATUS_ERP_DISMISSED 0x00200000
668 #define ZFCP_STATUS_ERP_LOWMEM 0x00400000
669
670 #define ZFCP_ERP_STEP_UNINITIALIZED 0x00000000
671 #define ZFCP_ERP_STEP_FSF_XCONFIG 0x00000001
672 #define ZFCP_ERP_STEP_PHYS_PORT_CLOSING 0x00000010
673 #define ZFCP_ERP_STEP_PORT_CLOSING 0x00000100
674 #define ZFCP_ERP_STEP_NAMESERVER_OPEN 0x00000200
675 #define ZFCP_ERP_STEP_NAMESERVER_LOOKUP 0x00000400
676 #define ZFCP_ERP_STEP_PORT_OPENING 0x00000800
677 #define ZFCP_ERP_STEP_UNIT_CLOSING 0x00001000
678 #define ZFCP_ERP_STEP_UNIT_OPENING 0x00002000
679
680 /* Ordered by escalation level (necessary for proper erp-code operation) */
681 #define ZFCP_ERP_ACTION_REOPEN_ADAPTER 0x4
682 #define ZFCP_ERP_ACTION_REOPEN_PORT_FORCED 0x3
683 #define ZFCP_ERP_ACTION_REOPEN_PORT 0x2
684 #define ZFCP_ERP_ACTION_REOPEN_UNIT 0x1
685
686 #define ZFCP_ERP_ACTION_RUNNING 0x1
687 #define ZFCP_ERP_ACTION_READY 0x2
688
689 #define ZFCP_ERP_SUCCEEDED 0x0
690 #define ZFCP_ERP_FAILED 0x1
691 #define ZFCP_ERP_CONTINUES 0x2
692 #define ZFCP_ERP_EXIT 0x3
693 #define ZFCP_ERP_DISMISSED 0x4
694 #define ZFCP_ERP_NOMEM 0x5
695
696
697 /******************** CFDC SPECIFIC STUFF *****************************/
698
699 /* Firewall data channel sense data record */
700 struct zfcp_cfdc_sense_data {
701 u32 signature; /* Request signature */
702 u32 devno; /* FCP adapter device number */
703 u32 command; /* Command code */
704 u32 fsf_status; /* FSF request status and status qualifier */
705 u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE];
706 u8 payloads[256]; /* Access conflicts list */
707 u8 control_file[0]; /* Access control table */
708 };
709
710 #define ZFCP_CFDC_SIGNATURE 0xCFDCACDF
711
712 #define ZFCP_CFDC_CMND_DOWNLOAD_NORMAL 0x00010001
713 #define ZFCP_CFDC_CMND_DOWNLOAD_FORCE 0x00010101
714 #define ZFCP_CFDC_CMND_FULL_ACCESS 0x00000201
715 #define ZFCP_CFDC_CMND_RESTRICTED_ACCESS 0x00000401
716 #define ZFCP_CFDC_CMND_UPLOAD 0x00010002
717
718 #define ZFCP_CFDC_DOWNLOAD 0x00000001
719 #define ZFCP_CFDC_UPLOAD 0x00000002
720 #define ZFCP_CFDC_WITH_CONTROL_FILE 0x00010000
721
722 #define ZFCP_CFDC_DEV_NAME "zfcp_cfdc"
723 #define ZFCP_CFDC_DEV_MAJOR MISC_MAJOR
724 #define ZFCP_CFDC_DEV_MINOR MISC_DYNAMIC_MINOR
725
726 #define ZFCP_CFDC_MAX_CONTROL_FILE_SIZE 127 * 1024
727
728 /************************* STRUCTURE DEFINITIONS *****************************/
729
730 struct zfcp_fsf_req;
731
732 /* holds various memory pools of an adapter */
733 struct zfcp_adapter_mempool {
734 mempool_t *fsf_req_erp;
735 mempool_t *fsf_req_scsi;
736 mempool_t *fsf_req_abort;
737 mempool_t *fsf_req_status_read;
738 mempool_t *data_status_read;
739 mempool_t *data_gid_pn;
740 };
741
742 /*
743 * header for CT_IU
744 */
745 struct ct_hdr {
746 u8 revision; // 0x01
747 u8 in_id[3]; // 0x00
748 u8 gs_type; // 0xFC Directory Service
749 u8 gs_subtype; // 0x02 Name Server
750 u8 options; // 0x00 single bidirectional exchange
751 u8 reserved0;
752 u16 cmd_rsp_code; // 0x0121 GID_PN, or 0x0100 GA_NXT
753 u16 max_res_size; // <= (4096 - 16) / 4
754 u8 reserved1;
755 u8 reason_code;
756 u8 reason_code_expl;
757 u8 vendor_unique;
758 } __attribute__ ((packed));
759
760 /* nameserver request CT_IU -- for requests where
761 * a port name is required */
762 struct ct_iu_gid_pn_req {
763 struct ct_hdr header;
764 wwn_t wwpn;
765 } __attribute__ ((packed));
766
767 /* FS_ACC IU and data unit for GID_PN nameserver request */
768 struct ct_iu_gid_pn_resp {
769 struct ct_hdr header;
770 u32 d_id;
771 } __attribute__ ((packed));
772
773 typedef void (*zfcp_send_ct_handler_t)(unsigned long);
774
775 /**
776 * struct zfcp_send_ct - used to pass parameters to function zfcp_fsf_send_ct
777 * @port: port where the request is sent to
778 * @req: scatter-gather list for request
779 * @resp: scatter-gather list for response
780 * @req_count: number of elements in request scatter-gather list
781 * @resp_count: number of elements in response scatter-gather list
782 * @handler: handler function (called for response to the request)
783 * @handler_data: data passed to handler function
784 * @pool: pointer to memory pool for ct request structure
785 * @timeout: FSF timeout for this request
786 * @completion: completion for synchronization purposes
787 * @status: used to pass error status to calling function
788 */
789 struct zfcp_send_ct {
790 struct zfcp_port *port;
791 struct scatterlist *req;
792 struct scatterlist *resp;
793 unsigned int req_count;
794 unsigned int resp_count;
795 zfcp_send_ct_handler_t handler;
796 unsigned long handler_data;
797 mempool_t *pool;
798 int timeout;
799 struct completion *completion;
800 int status;
801 };
802
803 /* used for name server requests in error recovery */
804 struct zfcp_gid_pn_data {
805 struct zfcp_send_ct ct;
806 struct scatterlist req;
807 struct scatterlist resp;
808 struct ct_iu_gid_pn_req ct_iu_req;
809 struct ct_iu_gid_pn_resp ct_iu_resp;
810 struct zfcp_port *port;
811 };
812
813 typedef void (*zfcp_send_els_handler_t)(unsigned long);
814
815 /**
816 * struct zfcp_send_els - used to pass parameters to function zfcp_fsf_send_els
817 * @adapter: adapter where request is sent from
818 * @port: port where ELS is destinated (port reference count has to be increased)
819 * @d_id: destiniation id of port where request is sent to
820 * @req: scatter-gather list for request
821 * @resp: scatter-gather list for response
822 * @req_count: number of elements in request scatter-gather list
823 * @resp_count: number of elements in response scatter-gather list
824 * @handler: handler function (called for response to the request)
825 * @handler_data: data passed to handler function
826 * @completion: completion for synchronization purposes
827 * @ls_code: hex code of ELS command
828 * @status: used to pass error status to calling function
829 */
830 struct zfcp_send_els {
831 struct zfcp_adapter *adapter;
832 struct zfcp_port *port;
833 u32 d_id;
834 struct scatterlist *req;
835 struct scatterlist *resp;
836 unsigned int req_count;
837 unsigned int resp_count;
838 zfcp_send_els_handler_t handler;
839 unsigned long handler_data;
840 struct completion *completion;
841 int ls_code;
842 int status;
843 };
844
845 struct zfcp_qdio_queue {
846 struct qdio_buffer *buffer[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */
847 u8 free_index; /* index of next free bfr
848 in queue (free_count>0) */
849 atomic_t free_count; /* number of free buffers
850 in queue */
851 rwlock_t queue_lock; /* lock for operations on queue */
852 int distance_from_int; /* SBALs used since PCI indication
853 was last set */
854 };
855
856 struct zfcp_erp_action {
857 struct list_head list;
858 int action; /* requested action code */
859 struct zfcp_adapter *adapter; /* device which should be recovered */
860 struct zfcp_port *port;
861 struct zfcp_unit *unit;
862 volatile u32 status; /* recovery status */
863 u32 step; /* active step of this erp action */
864 struct zfcp_fsf_req *fsf_req; /* fsf request currently pending
865 for this action */
866 struct timer_list timer;
867 };
868
869
870 struct zfcp_adapter {
871 struct list_head list; /* list of adapters */
872 atomic_t refcount; /* reference count */
873 wait_queue_head_t remove_wq; /* can be used to wait for
874 refcount drop to zero */
875 wwn_t peer_wwnn; /* P2P peer WWNN */
876 wwn_t peer_wwpn; /* P2P peer WWPN */
877 u32 peer_d_id; /* P2P peer D_ID */
878 struct ccw_device *ccw_device; /* S/390 ccw device */
879 u32 hydra_version; /* Hydra version */
880 u32 fsf_lic_version;
881 u32 adapter_features; /* FCP channel features */
882 u32 connection_features; /* host connection features */
883 u32 hardware_version; /* of FCP channel */
884 struct Scsi_Host *scsi_host; /* Pointer to mid-layer */
885 struct list_head port_list_head; /* remote port list */
886 struct list_head port_remove_lh; /* head of ports to be
887 removed */
888 u32 ports; /* number of remote ports */
889 atomic_t reqs_active; /* # active FSF reqs */
890 unsigned long req_no; /* unique FSF req number */
891 struct list_head *req_list; /* list of pending reqs */
892 spinlock_t req_list_lock; /* request list lock */
893 struct zfcp_qdio_queue request_queue; /* request queue */
894 u32 fsf_req_seq_no; /* FSF cmnd seq number */
895 wait_queue_head_t request_wq; /* can be used to wait for
896 more avaliable SBALs */
897 struct zfcp_qdio_queue response_queue; /* response queue */
898 rwlock_t abort_lock; /* Protects against SCSI
899 stack abort/command
900 completion races */
901 u16 status_read_failed; /* # failed status reads */
902 atomic_t status; /* status of this adapter */
903 struct list_head erp_ready_head; /* error recovery for this
904 adapter/devices */
905 struct list_head erp_running_head;
906 rwlock_t erp_lock;
907 struct semaphore erp_ready_sem;
908 wait_queue_head_t erp_thread_wqh;
909 wait_queue_head_t erp_done_wqh;
910 struct zfcp_erp_action erp_action; /* pending error recovery */
911 atomic_t erp_counter;
912 u32 erp_total_count; /* total nr of enqueued erp
913 actions */
914 u32 erp_low_mem_count; /* nr of erp actions waiting
915 for memory */
916 struct zfcp_port *nameserver_port; /* adapter's nameserver */
917 debug_info_t *erp_dbf;
918 debug_info_t *hba_dbf;
919 debug_info_t *san_dbf; /* debug feature areas */
920 debug_info_t *scsi_dbf;
921 spinlock_t erp_dbf_lock;
922 spinlock_t hba_dbf_lock;
923 spinlock_t san_dbf_lock;
924 spinlock_t scsi_dbf_lock;
925 struct zfcp_erp_dbf_record erp_dbf_buf;
926 struct zfcp_hba_dbf_record hba_dbf_buf;
927 struct zfcp_san_dbf_record san_dbf_buf;
928 struct zfcp_scsi_dbf_record scsi_dbf_buf;
929 struct zfcp_adapter_mempool pool; /* Adapter memory pools */
930 struct qdio_initialize qdio_init_data; /* for qdio_establish */
931 struct device generic_services; /* directory for WKA ports */
932 struct fc_host_statistics *fc_stats;
933 struct fsf_qtcb_bottom_port *stats_reset_data;
934 unsigned long stats_reset;
935 };
936
937 /*
938 * the struct device sysfs_device must be at the beginning of this structure.
939 * pointer to struct device is used to free port structure in release function
940 * of the device. don't change!
941 */
942 struct zfcp_port {
943 struct device sysfs_device; /* sysfs device */
944 struct fc_rport *rport; /* rport of fc transport class */
945 struct list_head list; /* list of remote ports */
946 atomic_t refcount; /* reference count */
947 wait_queue_head_t remove_wq; /* can be used to wait for
948 refcount drop to zero */
949 struct zfcp_adapter *adapter; /* adapter used to access port */
950 struct list_head unit_list_head; /* head of logical unit list */
951 struct list_head unit_remove_lh; /* head of luns to be removed
952 list */
953 u32 units; /* # of logical units in list */
954 atomic_t status; /* status of this remote port */
955 wwn_t wwnn; /* WWNN if known */
956 wwn_t wwpn; /* WWPN */
957 u32 d_id; /* D_ID */
958 u32 handle; /* handle assigned by FSF */
959 struct zfcp_erp_action erp_action; /* pending error recovery */
960 atomic_t erp_counter;
961 u32 maxframe_size;
962 u32 supported_classes;
963 };
964
965 /* the struct device sysfs_device must be at the beginning of this structure.
966 * pointer to struct device is used to free unit structure in release function
967 * of the device. don't change!
968 */
969 struct zfcp_unit {
970 struct device sysfs_device; /* sysfs device */
971 struct list_head list; /* list of logical units */
972 atomic_t refcount; /* reference count */
973 wait_queue_head_t remove_wq; /* can be used to wait for
974 refcount drop to zero */
975 struct zfcp_port *port; /* remote port of unit */
976 atomic_t status; /* status of this logical unit */
977 unsigned int scsi_lun; /* own SCSI LUN */
978 fcp_lun_t fcp_lun; /* own FCP_LUN */
979 u32 handle; /* handle assigned by FSF */
980 struct scsi_device *device; /* scsi device struct pointer */
981 struct zfcp_erp_action erp_action; /* pending error recovery */
982 atomic_t erp_counter;
983 };
984
985 /* FSF request */
986 struct zfcp_fsf_req {
987 struct list_head list; /* list of FSF requests */
988 unsigned long req_id; /* unique request ID */
989 struct zfcp_adapter *adapter; /* adapter request belongs to */
990 u8 sbal_number; /* nr of SBALs free for use */
991 u8 sbal_first; /* first SBAL for this request */
992 u8 sbal_last; /* last possible SBAL for
993 this reuest */
994 u8 sbal_curr; /* current SBAL during creation
995 of request */
996 u8 sbale_curr; /* current SBALE during creation
997 of request */
998 wait_queue_head_t completion_wq; /* can be used by a routine
999 to wait for completion */
1000 volatile u32 status; /* status of this request */
1001 u32 fsf_command; /* FSF Command copy */
1002 struct fsf_qtcb *qtcb; /* address of associated QTCB */
1003 u32 seq_no; /* Sequence number of request */
1004 unsigned long data; /* private data of request */
1005 struct timer_list timer; /* used for erp or scsi er */
1006 struct zfcp_erp_action *erp_action; /* used if this request is
1007 issued on behalf of erp */
1008 mempool_t *pool; /* used if request was alloacted
1009 from emergency pool */
1010 unsigned long long issued; /* request sent time (STCK) */
1011 struct zfcp_unit *unit;
1012 };
1013
1014 typedef void zfcp_fsf_req_handler_t(struct zfcp_fsf_req*);
1015
1016 /* driver data */
1017 struct zfcp_data {
1018 struct scsi_host_template scsi_host_template;
1019 struct scsi_transport_template *scsi_transport_template;
1020 atomic_t status; /* Module status flags */
1021 struct list_head adapter_list_head; /* head of adapter list */
1022 struct list_head adapter_remove_lh; /* head of adapters to be
1023 removed */
1024 u32 adapters; /* # of adapters in list */
1025 rwlock_t config_lock; /* serialises changes
1026 to adapter/port/unit
1027 lists */
1028 struct semaphore config_sema; /* serialises configuration
1029 changes */
1030 atomic_t loglevel; /* current loglevel */
1031 char init_busid[BUS_ID_SIZE];
1032 wwn_t init_wwpn;
1033 fcp_lun_t init_fcp_lun;
1034 char *driver_version;
1035 struct kmem_cache *fsf_req_qtcb_cache;
1036 struct kmem_cache *sr_buffer_cache;
1037 struct kmem_cache *gid_pn_cache;
1038 };
1039
1040 /**
1041 * struct zfcp_sg_list - struct describing a scatter-gather list
1042 * @sg: pointer to array of (struct scatterlist)
1043 * @count: number of elements in scatter-gather list
1044 */
1045 struct zfcp_sg_list {
1046 struct scatterlist *sg;
1047 unsigned int count;
1048 };
1049
1050 /* number of elements for various memory pools */
1051 #define ZFCP_POOL_FSF_REQ_ERP_NR 1
1052 #define ZFCP_POOL_FSF_REQ_SCSI_NR 1
1053 #define ZFCP_POOL_FSF_REQ_ABORT_NR 1
1054 #define ZFCP_POOL_STATUS_READ_NR ZFCP_STATUS_READS_RECOM
1055 #define ZFCP_POOL_DATA_GID_PN_NR 1
1056
1057 /* struct used by memory pools for fsf_requests */
1058 struct zfcp_fsf_req_qtcb {
1059 struct zfcp_fsf_req fsf_req;
1060 struct fsf_qtcb qtcb;
1061 };
1062
1063 /********************** ZFCP SPECIFIC DEFINES ********************************/
1064
1065 #define ZFCP_REQ_AUTO_CLEANUP 0x00000002
1066 #define ZFCP_WAIT_FOR_SBAL 0x00000004
1067 #define ZFCP_REQ_NO_QTCB 0x00000008
1068
1069 #define ZFCP_SET 0x00000100
1070 #define ZFCP_CLEAR 0x00000200
1071
1072 #ifndef atomic_test_mask
1073 #define atomic_test_mask(mask, target) \
1074 ((atomic_read(target) & mask) == mask)
1075 #endif
1076
1077 extern void _zfcp_hex_dump(char *, int);
1078 #define ZFCP_HEX_DUMP(level, addr, count) \
1079 if (ZFCP_LOG_CHECK(level)) { \
1080 _zfcp_hex_dump(addr, count); \
1081 }
1082
1083 #define zfcp_get_busid_by_adapter(adapter) (adapter->ccw_device->dev.bus_id)
1084 #define zfcp_get_busid_by_port(port) (zfcp_get_busid_by_adapter(port->adapter))
1085 #define zfcp_get_busid_by_unit(unit) (zfcp_get_busid_by_port(unit->port))
1086
1087 /*
1088 * functions needed for reference/usage counting
1089 */
1090
1091 static inline void
1092 zfcp_unit_get(struct zfcp_unit *unit)
1093 {
1094 atomic_inc(&unit->refcount);
1095 }
1096
1097 static inline void
1098 zfcp_unit_put(struct zfcp_unit *unit)
1099 {
1100 if (atomic_dec_return(&unit->refcount) == 0)
1101 wake_up(&unit->remove_wq);
1102 }
1103
1104 static inline void
1105 zfcp_unit_wait(struct zfcp_unit *unit)
1106 {
1107 wait_event(unit->remove_wq, atomic_read(&unit->refcount) == 0);
1108 }
1109
1110 static inline void
1111 zfcp_port_get(struct zfcp_port *port)
1112 {
1113 atomic_inc(&port->refcount);
1114 }
1115
1116 static inline void
1117 zfcp_port_put(struct zfcp_port *port)
1118 {
1119 if (atomic_dec_return(&port->refcount) == 0)
1120 wake_up(&port->remove_wq);
1121 }
1122
1123 static inline void
1124 zfcp_port_wait(struct zfcp_port *port)
1125 {
1126 wait_event(port->remove_wq, atomic_read(&port->refcount) == 0);
1127 }
1128
1129 static inline void
1130 zfcp_adapter_get(struct zfcp_adapter *adapter)
1131 {
1132 atomic_inc(&adapter->refcount);
1133 }
1134
1135 static inline void
1136 zfcp_adapter_put(struct zfcp_adapter *adapter)
1137 {
1138 if (atomic_dec_return(&adapter->refcount) == 0)
1139 wake_up(&adapter->remove_wq);
1140 }
1141
1142 static inline void
1143 zfcp_adapter_wait(struct zfcp_adapter *adapter)
1144 {
1145 wait_event(adapter->remove_wq, atomic_read(&adapter->refcount) == 0);
1146 }
1147
1148 #endif /* ZFCP_DEF_H */
Linux kernel - Deliverables
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