4 * Global definitions for the zfcp device driver.
6 * Copyright IBM Corporation 2002, 2008
12 /*************************** INCLUDES *****************************************/
14 #include <linux/init.h>
15 #include <linux/moduleparam.h>
16 #include <linux/major.h>
17 #include <linux/blkdev.h>
18 #include <linux/delay.h>
19 #include <linux/timer.h>
20 #include <linux/slab.h>
21 #include <linux/mempool.h>
22 #include <linux/syscalls.h>
23 #include <linux/scatterlist.h>
24 #include <linux/ioctl.h>
25 #include <scsi/scsi.h>
26 #include <scsi/scsi_tcq.h>
27 #include <scsi/scsi_cmnd.h>
28 #include <scsi/scsi_device.h>
29 #include <scsi/scsi_host.h>
30 #include <scsi/scsi_transport.h>
31 #include <scsi/scsi_transport_fc.h>
32 #include <asm/ccwdev.h>
34 #include <asm/debug.h>
35 #include <asm/ebcdic.h>
40 /********************* GENERAL DEFINES *********************************/
42 #define REQUEST_LIST_SIZE 128
44 /********************* SCSI SPECIFIC DEFINES *********************************/
45 #define ZFCP_SCSI_ER_TIMEOUT (10*HZ)
47 /********************* CIO/QDIO SPECIFIC DEFINES *****************************/
49 /* Adapter Identification Parameters */
50 #define ZFCP_CONTROL_UNIT_TYPE 0x1731
51 #define ZFCP_CONTROL_UNIT_MODEL 0x03
52 #define ZFCP_DEVICE_TYPE 0x1732
53 #define ZFCP_DEVICE_MODEL 0x03
54 #define ZFCP_DEVICE_MODEL_PRIV 0x04
56 /* DMQ bug workaround: don't use last SBALE */
57 #define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
59 /* index of last SBALE (with respect to DMQ bug workaround) */
60 #define ZFCP_LAST_SBALE_PER_SBAL (ZFCP_MAX_SBALES_PER_SBAL - 1)
62 /* max. number of (data buffer) SBALEs in largest SBAL chain */
63 #define ZFCP_MAX_SBALES_PER_REQ \
64 (FSF_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2)
65 /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */
67 #define ZFCP_MAX_SECTORS (ZFCP_MAX_SBALES_PER_REQ * 8)
68 /* max. number of (data buffer) SBALEs in largest SBAL chain
69 multiplied with number of sectors per 4k block */
71 /********************* FSF SPECIFIC DEFINES *********************************/
73 /* ATTENTION: value must not be used by hardware */
74 #define FSF_QTCB_UNSOLICITED_STATUS 0x6305
76 /* timeout value for "default timer" for fsf requests */
77 #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ)
79 /*************** FIBRE CHANNEL PROTOCOL SPECIFIC DEFINES ********************/
81 typedef unsigned long long wwn_t;
82 typedef unsigned long long fcp_lun_t;
83 /* data length field may be at variable position in FCP-2 FCP_CMND IU */
84 typedef unsigned int fcp_dl_t;
86 /* timeout for name-server lookup (in seconds) */
87 #define ZFCP_NS_GID_PN_TIMEOUT 10
89 /* task attribute values in FCP-2 FCP_CMND IU */
96 /* task management flags in FCP-2 FCP_CMND IU */
97 #define FCP_CLEAR_ACA 0x40
98 #define FCP_TARGET_RESET 0x20
99 #define FCP_LOGICAL_UNIT_RESET 0x10
100 #define FCP_CLEAR_TASK_SET 0x04
101 #define FCP_ABORT_TASK_SET 0x02
103 #define FCP_CDB_LENGTH 16
105 #define ZFCP_DID_MASK 0x00FFFFFF
107 /* FCP(-2) FCP_CMND IU */
109 fcp_lun_t fcp_lun; /* FCP logical unit number */
110 u8 crn; /* command reference number */
111 u8 reserved0:5; /* reserved */
112 u8 task_attribute:3; /* task attribute */
113 u8 task_management_flags; /* task management flags */
114 u8 add_fcp_cdb_length:6; /* additional FCP_CDB length */
115 u8 rddata:1; /* read data */
116 u8 wddata:1; /* write data */
117 u8 fcp_cdb[FCP_CDB_LENGTH];
118 } __attribute__((packed));
120 /* FCP(-2) FCP_RSP IU */
127 u8 fcp_resid_under:1;
129 u8 fcp_sns_len_valid:1;
130 u8 fcp_rsp_len_valid:1;
138 } __attribute__((packed));
141 #define RSP_CODE_GOOD 0
142 #define RSP_CODE_LENGTH_MISMATCH 1
143 #define RSP_CODE_FIELD_INVALID 2
144 #define RSP_CODE_RO_MISMATCH 3
145 #define RSP_CODE_TASKMAN_UNSUPP 4
146 #define RSP_CODE_TASKMAN_FAILED 5
151 #define LS_PLOGI 0x03
153 struct fcp_rscn_head {
155 u8 page_length; /* always 0x04 */
157 } __attribute__((packed));
159 struct fcp_rscn_element {
164 } __attribute__((packed));
166 #define ZFCP_PORT_ADDRESS 0x0
167 #define ZFCP_AREA_ADDRESS 0x1
168 #define ZFCP_DOMAIN_ADDRESS 0x2
169 #define ZFCP_FABRIC_ADDRESS 0x3
171 #define ZFCP_PORTS_RANGE_PORT 0xFFFFFF
172 #define ZFCP_PORTS_RANGE_AREA 0xFFFF00
173 #define ZFCP_PORTS_RANGE_DOMAIN 0xFF0000
174 #define ZFCP_PORTS_RANGE_FABRIC 0x000000
176 #define ZFCP_NO_PORTS_PER_AREA 0x100
177 #define ZFCP_NO_PORTS_PER_DOMAIN 0x10000
178 #define ZFCP_NO_PORTS_PER_FABRIC 0x1000000
185 } __attribute__((packed));
190 #define R_A_TOV 10 /* seconds */
192 #define ZFCP_LS_RLS 0x0f
193 #define ZFCP_LS_ADISC 0x52
194 #define ZFCP_LS_RPS 0x56
195 #define ZFCP_LS_RSCN 0x61
196 #define ZFCP_LS_RNID 0x78
198 struct zfcp_ls_adisc {
205 } __attribute__ ((packed));
210 #define ZFCP_CT_REVISION 0x01
211 #define ZFCP_CT_DIRECTORY_SERVICE 0xFC
212 #define ZFCP_CT_NAME_SERVER 0x02
213 #define ZFCP_CT_SYNCHRONOUS 0x00
214 #define ZFCP_CT_SCSI_FCP 0x08
215 #define ZFCP_CT_UNABLE_TO_PERFORM_CMD 0x09
216 #define ZFCP_CT_GID_PN 0x0121
217 #define ZFCP_CT_GPN_FT 0x0172
218 #define ZFCP_CT_MAX_SIZE 0x1020
219 #define ZFCP_CT_ACCEPT 0x8002
220 #define ZFCP_CT_REJECT 0x8001
225 #define ZFCP_CT_TIMEOUT (3 * R_A_TOV)
227 /*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/
230 * Note, the leftmost status byte is common among adapter, port
233 #define ZFCP_COMMON_FLAGS 0xfff00000
235 /* common status bits */
236 #define ZFCP_STATUS_COMMON_REMOVE 0x80000000
237 #define ZFCP_STATUS_COMMON_RUNNING 0x40000000
238 #define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000
239 #define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000
240 #define ZFCP_STATUS_COMMON_OPEN 0x04000000
241 #define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000
242 #define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000
243 #define ZFCP_STATUS_COMMON_ACCESS_BOXED 0x00400000
244 #define ZFCP_STATUS_COMMON_NOESC 0x00200000
247 #define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002
248 #define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008
249 #define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010
250 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_UP 0x00000020
251 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL 0x00000080
252 #define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100
253 #define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200
255 /* FC-PH/FC-GS well-known address identifiers for generic services */
256 #define ZFCP_DID_MANAGEMENT_SERVICE 0xFFFFFA
257 #define ZFCP_DID_TIME_SERVICE 0xFFFFFB
258 #define ZFCP_DID_DIRECTORY_SERVICE 0xFFFFFC
259 #define ZFCP_DID_ALIAS_SERVICE 0xFFFFF8
260 #define ZFCP_DID_KEY_DISTRIBUTION_SERVICE 0xFFFFF7
262 /* remote port status */
263 #define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001
264 #define ZFCP_STATUS_PORT_DID_DID 0x00000002
265 #define ZFCP_STATUS_PORT_PHYS_CLOSING 0x00000004
266 #define ZFCP_STATUS_PORT_NO_WWPN 0x00000008
267 #define ZFCP_STATUS_PORT_NO_SCSI_ID 0x00000010
268 #define ZFCP_STATUS_PORT_INVALID_WWPN 0x00000020
270 /* for ports with well known addresses */
271 #define ZFCP_STATUS_PORT_WKA \
272 (ZFCP_STATUS_PORT_NO_WWPN | \
273 ZFCP_STATUS_PORT_NO_SCSI_ID)
275 /* logical unit status */
276 #define ZFCP_STATUS_UNIT_SHARED 0x00000004
277 #define ZFCP_STATUS_UNIT_READONLY 0x00000008
278 #define ZFCP_STATUS_UNIT_REGISTERED 0x00000010
279 #define ZFCP_STATUS_UNIT_SCSI_WORK_PENDING 0x00000020
281 /* FSF request status (this does not have a common part) */
282 #define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT 0x00000002
283 #define ZFCP_STATUS_FSFREQ_COMPLETED 0x00000004
284 #define ZFCP_STATUS_FSFREQ_ERROR 0x00000008
285 #define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010
286 #define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040
287 #define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080
288 #define ZFCP_STATUS_FSFREQ_ABORTED 0x00000100
289 #define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200
290 #define ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP 0x00000400
291 #define ZFCP_STATUS_FSFREQ_RETRY 0x00000800
292 #define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000
294 /************************* STRUCTURE DEFINITIONS *****************************/
298 /* holds various memory pools of an adapter */
299 struct zfcp_adapter_mempool {
300 mempool_t *fsf_req_erp;
301 mempool_t *fsf_req_scsi;
302 mempool_t *fsf_req_abort;
303 mempool_t *fsf_req_status_read;
304 mempool_t *data_status_read;
305 mempool_t *data_gid_pn;
314 u8 gs_type; // 0xFC Directory Service
315 u8 gs_subtype; // 0x02 Name Server
316 u8 options; // 0x00 single bidirectional exchange
318 u16 cmd_rsp_code; // 0x0121 GID_PN, or 0x0100 GA_NXT
319 u16 max_res_size; // <= (4096 - 16) / 4
324 } __attribute__ ((packed));
326 /* nameserver request CT_IU -- for requests where
327 * a port name is required */
328 struct ct_iu_gid_pn_req {
329 struct ct_hdr header;
331 } __attribute__ ((packed));
333 /* FS_ACC IU and data unit for GID_PN nameserver request */
334 struct ct_iu_gid_pn_resp {
335 struct ct_hdr header;
337 } __attribute__ ((packed));
339 typedef void (*zfcp_send_ct_handler_t)(unsigned long);
342 * struct zfcp_send_ct - used to pass parameters to function zfcp_fsf_send_ct
343 * @port: port where the request is sent to
344 * @req: scatter-gather list for request
345 * @resp: scatter-gather list for response
346 * @req_count: number of elements in request scatter-gather list
347 * @resp_count: number of elements in response scatter-gather list
348 * @handler: handler function (called for response to the request)
349 * @handler_data: data passed to handler function
350 * @timeout: FSF timeout for this request
351 * @completion: completion for synchronization purposes
352 * @status: used to pass error status to calling function
354 struct zfcp_send_ct {
355 struct zfcp_port *port;
356 struct scatterlist *req;
357 struct scatterlist *resp;
358 unsigned int req_count;
359 unsigned int resp_count;
360 zfcp_send_ct_handler_t handler;
361 unsigned long handler_data;
363 struct completion *completion;
367 /* used for name server requests in error recovery */
368 struct zfcp_gid_pn_data {
369 struct zfcp_send_ct ct;
370 struct scatterlist req;
371 struct scatterlist resp;
372 struct ct_iu_gid_pn_req ct_iu_req;
373 struct ct_iu_gid_pn_resp ct_iu_resp;
374 struct zfcp_port *port;
377 typedef void (*zfcp_send_els_handler_t)(unsigned long);
380 * struct zfcp_send_els - used to pass parameters to function zfcp_fsf_send_els
381 * @adapter: adapter where request is sent from
382 * @port: port where ELS is destinated (port reference count has to be increased)
383 * @d_id: destiniation id of port where request is sent to
384 * @req: scatter-gather list for request
385 * @resp: scatter-gather list for response
386 * @req_count: number of elements in request scatter-gather list
387 * @resp_count: number of elements in response scatter-gather list
388 * @handler: handler function (called for response to the request)
389 * @handler_data: data passed to handler function
390 * @completion: completion for synchronization purposes
391 * @ls_code: hex code of ELS command
392 * @status: used to pass error status to calling function
394 struct zfcp_send_els {
395 struct zfcp_adapter *adapter;
396 struct zfcp_port *port;
398 struct scatterlist *req;
399 struct scatterlist *resp;
400 unsigned int req_count;
401 unsigned int resp_count;
402 zfcp_send_els_handler_t handler;
403 unsigned long handler_data;
404 struct completion *completion;
409 struct zfcp_qdio_queue {
410 struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */
411 u8 first; /* index of next free bfr
412 in queue (free_count>0) */
413 atomic_t count; /* number of free buffers
415 spinlock_t lock; /* lock for operations on queue */
416 int pci_batch; /* SBALs since PCI indication
420 struct zfcp_erp_action {
421 struct list_head list;
422 int action; /* requested action code */
423 struct zfcp_adapter *adapter; /* device which should be recovered */
424 struct zfcp_port *port;
425 struct zfcp_unit *unit;
426 u32 status; /* recovery status */
427 u32 step; /* active step of this erp action */
428 struct zfcp_fsf_req *fsf_req; /* fsf request currently pending
430 struct timer_list timer;
433 struct fsf_latency_record {
439 struct latency_cont {
440 struct fsf_latency_record channel;
441 struct fsf_latency_record fabric;
445 struct zfcp_latencies {
446 struct latency_cont read;
447 struct latency_cont write;
448 struct latency_cont cmd;
452 struct zfcp_adapter {
453 struct list_head list; /* list of adapters */
454 atomic_t refcount; /* reference count */
455 wait_queue_head_t remove_wq; /* can be used to wait for
456 refcount drop to zero */
457 wwn_t peer_wwnn; /* P2P peer WWNN */
458 wwn_t peer_wwpn; /* P2P peer WWPN */
459 u32 peer_d_id; /* P2P peer D_ID */
460 struct ccw_device *ccw_device; /* S/390 ccw device */
461 u32 hydra_version; /* Hydra version */
463 u32 adapter_features; /* FCP channel features */
464 u32 connection_features; /* host connection features */
465 u32 hardware_version; /* of FCP channel */
466 u16 timer_ticks; /* time int for a tick */
467 struct Scsi_Host *scsi_host; /* Pointer to mid-layer */
468 struct list_head port_list_head; /* remote port list */
469 struct list_head port_remove_lh; /* head of ports to be
471 u32 ports; /* number of remote ports */
472 unsigned long req_no; /* unique FSF req number */
473 struct list_head *req_list; /* list of pending reqs */
474 spinlock_t req_list_lock; /* request list lock */
475 struct zfcp_qdio_queue req_q; /* request queue */
476 u32 fsf_req_seq_no; /* FSF cmnd seq number */
477 wait_queue_head_t request_wq; /* can be used to wait for
478 more avaliable SBALs */
479 struct zfcp_qdio_queue resp_q; /* response queue */
480 rwlock_t abort_lock; /* Protects against SCSI
483 atomic_t stat_miss; /* # missing status reads*/
484 struct work_struct stat_work;
485 atomic_t status; /* status of this adapter */
486 struct list_head erp_ready_head; /* error recovery for this
488 struct list_head erp_running_head;
490 struct semaphore erp_ready_sem;
491 wait_queue_head_t erp_thread_wqh;
492 wait_queue_head_t erp_done_wqh;
493 struct zfcp_erp_action erp_action; /* pending error recovery */
494 atomic_t erp_counter;
495 u32 erp_total_count; /* total nr of enqueued erp
497 u32 erp_low_mem_count; /* nr of erp actions waiting
499 struct zfcp_port *nameserver_port; /* adapter's nameserver */
500 debug_info_t *rec_dbf;
501 debug_info_t *hba_dbf;
502 debug_info_t *san_dbf; /* debug feature areas */
503 debug_info_t *scsi_dbf;
504 spinlock_t rec_dbf_lock;
505 spinlock_t hba_dbf_lock;
506 spinlock_t san_dbf_lock;
507 spinlock_t scsi_dbf_lock;
508 struct zfcp_rec_dbf_record rec_dbf_buf;
509 struct zfcp_hba_dbf_record hba_dbf_buf;
510 struct zfcp_san_dbf_record san_dbf_buf;
511 struct zfcp_scsi_dbf_record scsi_dbf_buf;
512 struct zfcp_adapter_mempool pool; /* Adapter memory pools */
513 struct qdio_initialize qdio_init_data; /* for qdio_establish */
514 struct device generic_services; /* directory for WKA ports */
515 struct fc_host_statistics *fc_stats;
516 struct fsf_qtcb_bottom_port *stats_reset_data;
517 unsigned long stats_reset;
518 struct work_struct scan_work;
519 atomic_t qdio_outb_full; /* queue full incidents */
523 struct device sysfs_device; /* sysfs device */
524 struct fc_rport *rport; /* rport of fc transport class */
525 struct list_head list; /* list of remote ports */
526 atomic_t refcount; /* reference count */
527 wait_queue_head_t remove_wq; /* can be used to wait for
528 refcount drop to zero */
529 struct zfcp_adapter *adapter; /* adapter used to access port */
530 struct list_head unit_list_head; /* head of logical unit list */
531 struct list_head unit_remove_lh; /* head of luns to be removed
533 u32 units; /* # of logical units in list */
534 atomic_t status; /* status of this remote port */
535 wwn_t wwnn; /* WWNN if known */
536 wwn_t wwpn; /* WWPN */
538 u32 handle; /* handle assigned by FSF */
539 struct zfcp_erp_action erp_action; /* pending error recovery */
540 atomic_t erp_counter;
542 u32 supported_classes;
546 struct device sysfs_device; /* sysfs device */
547 struct list_head list; /* list of logical units */
548 atomic_t refcount; /* reference count */
549 wait_queue_head_t remove_wq; /* can be used to wait for
550 refcount drop to zero */
551 struct zfcp_port *port; /* remote port of unit */
552 atomic_t status; /* status of this logical unit */
553 unsigned int scsi_lun; /* own SCSI LUN */
554 fcp_lun_t fcp_lun; /* own FCP_LUN */
555 u32 handle; /* handle assigned by FSF */
556 struct scsi_device *device; /* scsi device struct pointer */
557 struct zfcp_erp_action erp_action; /* pending error recovery */
558 atomic_t erp_counter;
559 struct zfcp_latencies latencies;
563 struct zfcp_fsf_req {
564 struct list_head list; /* list of FSF requests */
565 unsigned long req_id; /* unique request ID */
566 struct zfcp_adapter *adapter; /* adapter request belongs to */
567 u8 sbal_number; /* nr of SBALs free for use */
568 u8 sbal_first; /* first SBAL for this request */
569 u8 sbal_last; /* last SBAL for this request */
570 u8 sbal_limit; /* last possible SBAL for
572 u8 sbale_curr; /* current SBALE during creation
574 u8 sbal_response; /* SBAL used in interrupt */
575 wait_queue_head_t completion_wq; /* can be used by a routine
576 to wait for completion */
577 u32 status; /* status of this request */
578 u32 fsf_command; /* FSF Command copy */
579 struct fsf_qtcb *qtcb; /* address of associated QTCB */
580 u32 seq_no; /* Sequence number of request */
581 void *data; /* private data of request */
582 struct timer_list timer; /* used for erp or scsi er */
583 struct zfcp_erp_action *erp_action; /* used if this request is
584 issued on behalf of erp */
585 mempool_t *pool; /* used if request was alloacted
586 from emergency pool */
587 unsigned long long issued; /* request sent time (STCK) */
588 struct zfcp_unit *unit;
589 void (*handler)(struct zfcp_fsf_req *);
594 struct scsi_host_template scsi_host_template;
595 struct scsi_transport_template *scsi_transport_template;
596 atomic_t status; /* Module status flags */
597 struct list_head adapter_list_head; /* head of adapter list */
598 struct list_head adapter_remove_lh; /* head of adapters to be
600 u32 adapters; /* # of adapters in list */
601 rwlock_t config_lock; /* serialises changes
604 struct semaphore config_sema; /* serialises configuration
606 atomic_t loglevel; /* current loglevel */
607 char init_busid[BUS_ID_SIZE];
609 fcp_lun_t init_fcp_lun;
610 struct kmem_cache *fsf_req_qtcb_cache;
611 struct kmem_cache *sr_buffer_cache;
612 struct kmem_cache *gid_pn_cache;
615 /* struct used by memory pools for fsf_requests */
616 struct zfcp_fsf_req_qtcb {
617 struct zfcp_fsf_req fsf_req;
618 struct fsf_qtcb qtcb;
621 /********************** ZFCP SPECIFIC DEFINES ********************************/
623 #define ZFCP_REQ_AUTO_CLEANUP 0x00000002
624 #define ZFCP_REQ_NO_QTCB 0x00000008
626 #define ZFCP_SET 0x00000100
627 #define ZFCP_CLEAR 0x00000200
629 #define zfcp_get_busid_by_adapter(adapter) (adapter->ccw_device->dev.bus_id)
632 * Helper functions for request ID management.
634 static inline int zfcp_reqlist_hash(unsigned long req_id)
636 return req_id % REQUEST_LIST_SIZE;
639 static inline void zfcp_reqlist_remove(struct zfcp_adapter *adapter,
640 struct zfcp_fsf_req *fsf_req)
642 list_del(&fsf_req->list);
645 static inline struct zfcp_fsf_req *
646 zfcp_reqlist_find(struct zfcp_adapter *adapter, unsigned long req_id)
648 struct zfcp_fsf_req *request;
651 idx = zfcp_reqlist_hash(req_id);
652 list_for_each_entry(request, &adapter->req_list[idx], list)
653 if (request->req_id == req_id)
658 static inline struct zfcp_fsf_req *
659 zfcp_reqlist_find_safe(struct zfcp_adapter *adapter, struct zfcp_fsf_req *req)
661 struct zfcp_fsf_req *request;
664 for (idx = 0; idx < REQUEST_LIST_SIZE; idx++) {
665 list_for_each_entry(request, &adapter->req_list[idx], list)
673 * functions needed for reference/usage counting
677 zfcp_unit_get(struct zfcp_unit *unit)
679 atomic_inc(&unit->refcount);
683 zfcp_unit_put(struct zfcp_unit *unit)
685 if (atomic_dec_return(&unit->refcount) == 0)
686 wake_up(&unit->remove_wq);
690 zfcp_port_get(struct zfcp_port *port)
692 atomic_inc(&port->refcount);
696 zfcp_port_put(struct zfcp_port *port)
698 if (atomic_dec_return(&port->refcount) == 0)
699 wake_up(&port->remove_wq);
703 zfcp_adapter_get(struct zfcp_adapter *adapter)
705 atomic_inc(&adapter->refcount);
709 zfcp_adapter_put(struct zfcp_adapter *adapter)
711 if (atomic_dec_return(&adapter->refcount) == 0)
712 wake_up(&adapter->remove_wq);
715 #endif /* ZFCP_DEF_H */