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 *********************************/
43 * zfcp_sg_to_address - determine kernel address from struct scatterlist
44 * @list: struct scatterlist
45 * Return: kernel address
48 zfcp_sg_to_address(struct scatterlist
*list
)
54 * zfcp_address_to_sg - set up struct scatterlist from kernel address
55 * @address: kernel address
56 * @list: struct scatterlist
60 zfcp_address_to_sg(void *address
, struct scatterlist
*list
, unsigned int size
)
62 sg_set_buf(list
, address
, size
);
65 #define REQUEST_LIST_SIZE 128
67 /********************* SCSI SPECIFIC DEFINES *********************************/
68 #define ZFCP_SCSI_ER_TIMEOUT (10*HZ)
70 /********************* CIO/QDIO SPECIFIC DEFINES *****************************/
72 /* Adapter Identification Parameters */
73 #define ZFCP_CONTROL_UNIT_TYPE 0x1731
74 #define ZFCP_CONTROL_UNIT_MODEL 0x03
75 #define ZFCP_DEVICE_TYPE 0x1732
76 #define ZFCP_DEVICE_MODEL 0x03
77 #define ZFCP_DEVICE_MODEL_PRIV 0x04
79 /* DMQ bug workaround: don't use last SBALE */
80 #define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
82 /* index of last SBALE (with respect to DMQ bug workaround) */
83 #define ZFCP_LAST_SBALE_PER_SBAL (ZFCP_MAX_SBALES_PER_SBAL - 1)
85 /* max. number of (data buffer) SBALEs in largest SBAL chain */
86 #define ZFCP_MAX_SBALES_PER_REQ \
87 (FSF_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2)
88 /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */
90 #define ZFCP_MAX_SECTORS (ZFCP_MAX_SBALES_PER_REQ * 8)
91 /* max. number of (data buffer) SBALEs in largest SBAL chain
92 multiplied with number of sectors per 4k block */
94 /********************* FSF SPECIFIC DEFINES *********************************/
96 /* ATTENTION: value must not be used by hardware */
97 #define FSF_QTCB_UNSOLICITED_STATUS 0x6305
99 /* timeout value for "default timer" for fsf requests */
100 #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ)
102 /*************** FIBRE CHANNEL PROTOCOL SPECIFIC DEFINES ********************/
104 typedef unsigned long long wwn_t
;
105 typedef unsigned long long fcp_lun_t
;
106 /* data length field may be at variable position in FCP-2 FCP_CMND IU */
107 typedef unsigned int fcp_dl_t
;
109 /* timeout for name-server lookup (in seconds) */
110 #define ZFCP_NS_GID_PN_TIMEOUT 10
112 /* task attribute values in FCP-2 FCP_CMND IU */
119 /* task management flags in FCP-2 FCP_CMND IU */
120 #define FCP_CLEAR_ACA 0x40
121 #define FCP_TARGET_RESET 0x20
122 #define FCP_LOGICAL_UNIT_RESET 0x10
123 #define FCP_CLEAR_TASK_SET 0x04
124 #define FCP_ABORT_TASK_SET 0x02
126 #define FCP_CDB_LENGTH 16
128 #define ZFCP_DID_MASK 0x00FFFFFF
130 /* FCP(-2) FCP_CMND IU */
132 fcp_lun_t fcp_lun
; /* FCP logical unit number */
133 u8 crn
; /* command reference number */
134 u8 reserved0
:5; /* reserved */
135 u8 task_attribute
:3; /* task attribute */
136 u8 task_management_flags
; /* task management flags */
137 u8 add_fcp_cdb_length
:6; /* additional FCP_CDB length */
138 u8 rddata
:1; /* read data */
139 u8 wddata
:1; /* write data */
140 u8 fcp_cdb
[FCP_CDB_LENGTH
];
141 } __attribute__((packed
));
143 /* FCP(-2) FCP_RSP IU */
150 u8 fcp_resid_under
:1;
152 u8 fcp_sns_len_valid
:1;
153 u8 fcp_rsp_len_valid
:1;
161 } __attribute__((packed
));
164 #define RSP_CODE_GOOD 0
165 #define RSP_CODE_LENGTH_MISMATCH 1
166 #define RSP_CODE_FIELD_INVALID 2
167 #define RSP_CODE_RO_MISMATCH 3
168 #define RSP_CODE_TASKMAN_UNSUPP 4
169 #define RSP_CODE_TASKMAN_FAILED 5
174 #define LS_PLOGI 0x03
176 struct fcp_rscn_head
{
178 u8 page_length
; /* always 0x04 */
180 } __attribute__((packed
));
182 struct fcp_rscn_element
{
187 } __attribute__((packed
));
189 #define ZFCP_PORT_ADDRESS 0x0
190 #define ZFCP_AREA_ADDRESS 0x1
191 #define ZFCP_DOMAIN_ADDRESS 0x2
192 #define ZFCP_FABRIC_ADDRESS 0x3
194 #define ZFCP_PORTS_RANGE_PORT 0xFFFFFF
195 #define ZFCP_PORTS_RANGE_AREA 0xFFFF00
196 #define ZFCP_PORTS_RANGE_DOMAIN 0xFF0000
197 #define ZFCP_PORTS_RANGE_FABRIC 0x000000
199 #define ZFCP_NO_PORTS_PER_AREA 0x100
200 #define ZFCP_NO_PORTS_PER_DOMAIN 0x10000
201 #define ZFCP_NO_PORTS_PER_FABRIC 0x1000000
208 } __attribute__((packed
));
213 #define R_A_TOV 10 /* seconds */
215 #define ZFCP_LS_RLS 0x0f
216 #define ZFCP_LS_ADISC 0x52
217 #define ZFCP_LS_RPS 0x56
218 #define ZFCP_LS_RSCN 0x61
219 #define ZFCP_LS_RNID 0x78
221 struct zfcp_ls_rjt_par
{
226 } __attribute__ ((packed
));
228 struct zfcp_ls_adisc
{
235 } __attribute__ ((packed
));
237 struct zfcp_ls_adisc_acc
{
244 } __attribute__ ((packed
));
246 struct zfcp_rc_entry
{
248 const char *description
;
254 #define ZFCP_CT_REVISION 0x01
255 #define ZFCP_CT_DIRECTORY_SERVICE 0xFC
256 #define ZFCP_CT_NAME_SERVER 0x02
257 #define ZFCP_CT_SYNCHRONOUS 0x00
258 #define ZFCP_CT_SCSI_FCP 0x08
259 #define ZFCP_CT_UNABLE_TO_PERFORM_CMD 0x09
260 #define ZFCP_CT_GID_PN 0x0121
261 #define ZFCP_CT_GPN_FT 0x0172
262 #define ZFCP_CT_MAX_SIZE 0x1020
263 #define ZFCP_CT_ACCEPT 0x8002
264 #define ZFCP_CT_REJECT 0x8001
269 #define ZFCP_CT_TIMEOUT (3 * R_A_TOV)
271 /*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/
274 * Note, the leftmost status byte is common among adapter, port
277 #define ZFCP_COMMON_FLAGS 0xfff00000
279 /* common status bits */
280 #define ZFCP_STATUS_COMMON_REMOVE 0x80000000
281 #define ZFCP_STATUS_COMMON_RUNNING 0x40000000
282 #define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000
283 #define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000
284 #define ZFCP_STATUS_COMMON_OPENING 0x08000000
285 #define ZFCP_STATUS_COMMON_OPEN 0x04000000
286 #define ZFCP_STATUS_COMMON_CLOSING 0x02000000
287 #define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000
288 #define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000
289 #define ZFCP_STATUS_COMMON_ACCESS_BOXED 0x00400000
290 #define ZFCP_STATUS_COMMON_NOESC 0x00200000
293 #define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002
294 #define ZFCP_STATUS_ADAPTER_REGISTERED 0x00000004
295 #define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008
296 #define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010
297 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_UP 0x00000020
298 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL 0x00000080
299 #define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100
300 #define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200
301 #define ZFCP_STATUS_ADAPTER_XPORT_OK 0x00000800
303 /* FC-PH/FC-GS well-known address identifiers for generic services */
304 #define ZFCP_DID_MANAGEMENT_SERVICE 0xFFFFFA
305 #define ZFCP_DID_TIME_SERVICE 0xFFFFFB
306 #define ZFCP_DID_DIRECTORY_SERVICE 0xFFFFFC
307 #define ZFCP_DID_ALIAS_SERVICE 0xFFFFF8
308 #define ZFCP_DID_KEY_DISTRIBUTION_SERVICE 0xFFFFF7
310 /* remote port status */
311 #define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001
312 #define ZFCP_STATUS_PORT_DID_DID 0x00000002
313 #define ZFCP_STATUS_PORT_PHYS_CLOSING 0x00000004
314 #define ZFCP_STATUS_PORT_NO_WWPN 0x00000008
315 #define ZFCP_STATUS_PORT_NO_SCSI_ID 0x00000010
316 #define ZFCP_STATUS_PORT_INVALID_WWPN 0x00000020
318 /* for ports with well known addresses */
319 #define ZFCP_STATUS_PORT_WKA \
320 (ZFCP_STATUS_PORT_NO_WWPN | \
321 ZFCP_STATUS_PORT_NO_SCSI_ID)
323 /* logical unit status */
324 #define ZFCP_STATUS_UNIT_TEMPORARY 0x00000002
325 #define ZFCP_STATUS_UNIT_SHARED 0x00000004
326 #define ZFCP_STATUS_UNIT_READONLY 0x00000008
327 #define ZFCP_STATUS_UNIT_REGISTERED 0x00000010
328 #define ZFCP_STATUS_UNIT_SCSI_WORK_PENDING 0x00000020
330 /* FSF request status (this does not have a common part) */
331 #define ZFCP_STATUS_FSFREQ_NOT_INIT 0x00000000
332 #define ZFCP_STATUS_FSFREQ_POOL 0x00000001
333 #define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT 0x00000002
334 #define ZFCP_STATUS_FSFREQ_COMPLETED 0x00000004
335 #define ZFCP_STATUS_FSFREQ_ERROR 0x00000008
336 #define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010
337 #define ZFCP_STATUS_FSFREQ_ABORTING 0x00000020
338 #define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040
339 #define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080
340 #define ZFCP_STATUS_FSFREQ_ABORTED 0x00000100
341 #define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200
342 #define ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP 0x00000400
343 #define ZFCP_STATUS_FSFREQ_RETRY 0x00000800
344 #define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000
346 /************************* STRUCTURE DEFINITIONS *****************************/
350 /* holds various memory pools of an adapter */
351 struct zfcp_adapter_mempool
{
352 mempool_t
*fsf_req_erp
;
353 mempool_t
*fsf_req_scsi
;
354 mempool_t
*fsf_req_abort
;
355 mempool_t
*fsf_req_status_read
;
356 mempool_t
*data_status_read
;
357 mempool_t
*data_gid_pn
;
366 u8 gs_type
; // 0xFC Directory Service
367 u8 gs_subtype
; // 0x02 Name Server
368 u8 options
; // 0x00 single bidirectional exchange
370 u16 cmd_rsp_code
; // 0x0121 GID_PN, or 0x0100 GA_NXT
371 u16 max_res_size
; // <= (4096 - 16) / 4
376 } __attribute__ ((packed
));
378 /* nameserver request CT_IU -- for requests where
379 * a port name is required */
380 struct ct_iu_gid_pn_req
{
381 struct ct_hdr header
;
383 } __attribute__ ((packed
));
385 /* FS_ACC IU and data unit for GID_PN nameserver request */
386 struct ct_iu_gid_pn_resp
{
387 struct ct_hdr header
;
389 } __attribute__ ((packed
));
391 typedef void (*zfcp_send_ct_handler_t
)(unsigned long);
394 * struct zfcp_send_ct - used to pass parameters to function zfcp_fsf_send_ct
395 * @port: port where the request is sent to
396 * @req: scatter-gather list for request
397 * @resp: scatter-gather list for response
398 * @req_count: number of elements in request scatter-gather list
399 * @resp_count: number of elements in response scatter-gather list
400 * @handler: handler function (called for response to the request)
401 * @handler_data: data passed to handler function
402 * @timeout: FSF timeout for this request
403 * @completion: completion for synchronization purposes
404 * @status: used to pass error status to calling function
406 struct zfcp_send_ct
{
407 struct zfcp_port
*port
;
408 struct scatterlist
*req
;
409 struct scatterlist
*resp
;
410 unsigned int req_count
;
411 unsigned int resp_count
;
412 zfcp_send_ct_handler_t handler
;
413 unsigned long handler_data
;
415 struct completion
*completion
;
419 /* used for name server requests in error recovery */
420 struct zfcp_gid_pn_data
{
421 struct zfcp_send_ct ct
;
422 struct scatterlist req
;
423 struct scatterlist resp
;
424 struct ct_iu_gid_pn_req ct_iu_req
;
425 struct ct_iu_gid_pn_resp ct_iu_resp
;
426 struct zfcp_port
*port
;
429 typedef void (*zfcp_send_els_handler_t
)(unsigned long);
432 * struct zfcp_send_els - used to pass parameters to function zfcp_fsf_send_els
433 * @adapter: adapter where request is sent from
434 * @port: port where ELS is destinated (port reference count has to be increased)
435 * @d_id: destiniation id of port where request is sent to
436 * @req: scatter-gather list for request
437 * @resp: scatter-gather list for response
438 * @req_count: number of elements in request scatter-gather list
439 * @resp_count: number of elements in response scatter-gather list
440 * @handler: handler function (called for response to the request)
441 * @handler_data: data passed to handler function
442 * @completion: completion for synchronization purposes
443 * @ls_code: hex code of ELS command
444 * @status: used to pass error status to calling function
446 struct zfcp_send_els
{
447 struct zfcp_adapter
*adapter
;
448 struct zfcp_port
*port
;
450 struct scatterlist
*req
;
451 struct scatterlist
*resp
;
452 unsigned int req_count
;
453 unsigned int resp_count
;
454 zfcp_send_els_handler_t handler
;
455 unsigned long handler_data
;
456 struct completion
*completion
;
461 struct zfcp_qdio_queue
{
462 struct qdio_buffer
*sbal
[QDIO_MAX_BUFFERS_PER_Q
]; /* SBALs */
463 u8 first
; /* index of next free bfr
464 in queue (free_count>0) */
465 atomic_t count
; /* number of free buffers
467 spinlock_t lock
; /* lock for operations on queue */
468 int pci_batch
; /* SBALs since PCI indication
472 struct zfcp_erp_action
{
473 struct list_head list
;
474 int action
; /* requested action code */
475 struct zfcp_adapter
*adapter
; /* device which should be recovered */
476 struct zfcp_port
*port
;
477 struct zfcp_unit
*unit
;
478 volatile u32 status
; /* recovery status */
479 u32 step
; /* active step of this erp action */
480 struct zfcp_fsf_req
*fsf_req
; /* fsf request currently pending
482 struct timer_list timer
;
485 struct fsf_latency_record
{
491 struct latency_cont
{
492 struct fsf_latency_record channel
;
493 struct fsf_latency_record fabric
;
497 struct zfcp_latencies
{
498 struct latency_cont read
;
499 struct latency_cont write
;
500 struct latency_cont cmd
;
504 struct zfcp_adapter
{
505 struct list_head list
; /* list of adapters */
506 atomic_t refcount
; /* reference count */
507 wait_queue_head_t remove_wq
; /* can be used to wait for
508 refcount drop to zero */
509 wwn_t peer_wwnn
; /* P2P peer WWNN */
510 wwn_t peer_wwpn
; /* P2P peer WWPN */
511 u32 peer_d_id
; /* P2P peer D_ID */
512 struct ccw_device
*ccw_device
; /* S/390 ccw device */
513 u32 hydra_version
; /* Hydra version */
515 u32 adapter_features
; /* FCP channel features */
516 u32 connection_features
; /* host connection features */
517 u32 hardware_version
; /* of FCP channel */
518 u16 timer_ticks
; /* time int for a tick */
519 struct Scsi_Host
*scsi_host
; /* Pointer to mid-layer */
520 struct list_head port_list_head
; /* remote port list */
521 struct list_head port_remove_lh
; /* head of ports to be
523 u32 ports
; /* number of remote ports */
524 unsigned long req_no
; /* unique FSF req number */
525 struct list_head
*req_list
; /* list of pending reqs */
526 spinlock_t req_list_lock
; /* request list lock */
527 struct zfcp_qdio_queue req_q
; /* request queue */
528 u32 fsf_req_seq_no
; /* FSF cmnd seq number */
529 wait_queue_head_t request_wq
; /* can be used to wait for
530 more avaliable SBALs */
531 struct zfcp_qdio_queue resp_q
; /* response queue */
532 rwlock_t abort_lock
; /* Protects against SCSI
535 atomic_t stat_miss
; /* # missing status reads*/
536 struct work_struct stat_work
;
537 atomic_t status
; /* status of this adapter */
538 struct list_head erp_ready_head
; /* error recovery for this
540 struct list_head erp_running_head
;
542 struct semaphore erp_ready_sem
;
543 wait_queue_head_t erp_thread_wqh
;
544 wait_queue_head_t erp_done_wqh
;
545 struct zfcp_erp_action erp_action
; /* pending error recovery */
546 atomic_t erp_counter
;
547 u32 erp_total_count
; /* total nr of enqueued erp
549 u32 erp_low_mem_count
; /* nr of erp actions waiting
551 struct zfcp_port
*nameserver_port
; /* adapter's nameserver */
552 debug_info_t
*rec_dbf
;
553 debug_info_t
*hba_dbf
;
554 debug_info_t
*san_dbf
; /* debug feature areas */
555 debug_info_t
*scsi_dbf
;
556 spinlock_t rec_dbf_lock
;
557 spinlock_t hba_dbf_lock
;
558 spinlock_t san_dbf_lock
;
559 spinlock_t scsi_dbf_lock
;
560 struct zfcp_rec_dbf_record rec_dbf_buf
;
561 struct zfcp_hba_dbf_record hba_dbf_buf
;
562 struct zfcp_san_dbf_record san_dbf_buf
;
563 struct zfcp_scsi_dbf_record scsi_dbf_buf
;
564 struct zfcp_adapter_mempool pool
; /* Adapter memory pools */
565 struct qdio_initialize qdio_init_data
; /* for qdio_establish */
566 struct device generic_services
; /* directory for WKA ports */
567 struct fc_host_statistics
*fc_stats
;
568 struct fsf_qtcb_bottom_port
*stats_reset_data
;
569 unsigned long stats_reset
;
570 struct work_struct scan_work
;
574 struct device sysfs_device
; /* sysfs device */
575 struct fc_rport
*rport
; /* rport of fc transport class */
576 struct list_head list
; /* list of remote ports */
577 atomic_t refcount
; /* reference count */
578 wait_queue_head_t remove_wq
; /* can be used to wait for
579 refcount drop to zero */
580 struct zfcp_adapter
*adapter
; /* adapter used to access port */
581 struct list_head unit_list_head
; /* head of logical unit list */
582 struct list_head unit_remove_lh
; /* head of luns to be removed
584 u32 units
; /* # of logical units in list */
585 atomic_t status
; /* status of this remote port */
586 wwn_t wwnn
; /* WWNN if known */
587 wwn_t wwpn
; /* WWPN */
589 u32 handle
; /* handle assigned by FSF */
590 struct zfcp_erp_action erp_action
; /* pending error recovery */
591 atomic_t erp_counter
;
593 u32 supported_classes
;
597 struct device sysfs_device
; /* sysfs device */
598 struct list_head list
; /* list of logical units */
599 atomic_t refcount
; /* reference count */
600 wait_queue_head_t remove_wq
; /* can be used to wait for
601 refcount drop to zero */
602 struct zfcp_port
*port
; /* remote port of unit */
603 atomic_t status
; /* status of this logical unit */
604 unsigned int scsi_lun
; /* own SCSI LUN */
605 fcp_lun_t fcp_lun
; /* own FCP_LUN */
606 u32 handle
; /* handle assigned by FSF */
607 struct scsi_device
*device
; /* scsi device struct pointer */
608 struct zfcp_erp_action erp_action
; /* pending error recovery */
609 atomic_t erp_counter
;
610 struct zfcp_latencies latencies
;
614 struct zfcp_fsf_req
{
615 struct list_head list
; /* list of FSF requests */
616 unsigned long req_id
; /* unique request ID */
617 struct zfcp_adapter
*adapter
; /* adapter request belongs to */
618 u8 sbal_number
; /* nr of SBALs free for use */
619 u8 sbal_first
; /* first SBAL for this request */
620 u8 sbal_last
; /* last SBAL for this request */
621 u8 sbal_limit
; /* last possible SBAL for
623 u8 sbale_curr
; /* current SBALE during creation
625 u8 sbal_response
; /* SBAL used in interrupt */
626 wait_queue_head_t completion_wq
; /* can be used by a routine
627 to wait for completion */
628 volatile u32 status
; /* status of this request */
629 u32 fsf_command
; /* FSF Command copy */
630 struct fsf_qtcb
*qtcb
; /* address of associated QTCB */
631 u32 seq_no
; /* Sequence number of request */
632 void *data
; /* private data of request */
633 struct timer_list timer
; /* used for erp or scsi er */
634 struct zfcp_erp_action
*erp_action
; /* used if this request is
635 issued on behalf of erp */
636 mempool_t
*pool
; /* used if request was alloacted
637 from emergency pool */
638 unsigned long long issued
; /* request sent time (STCK) */
639 struct zfcp_unit
*unit
;
640 void (*handler
)(struct zfcp_fsf_req
*);
645 struct scsi_host_template scsi_host_template
;
646 struct scsi_transport_template
*scsi_transport_template
;
647 atomic_t status
; /* Module status flags */
648 struct list_head adapter_list_head
; /* head of adapter list */
649 struct list_head adapter_remove_lh
; /* head of adapters to be
651 u32 adapters
; /* # of adapters in list */
652 rwlock_t config_lock
; /* serialises changes
655 struct semaphore config_sema
; /* serialises configuration
657 atomic_t loglevel
; /* current loglevel */
658 char init_busid
[BUS_ID_SIZE
];
660 fcp_lun_t init_fcp_lun
;
661 struct kmem_cache
*fsf_req_qtcb_cache
;
662 struct kmem_cache
*sr_buffer_cache
;
663 struct kmem_cache
*gid_pn_cache
;
666 /* struct used by memory pools for fsf_requests */
667 struct zfcp_fsf_req_qtcb
{
668 struct zfcp_fsf_req fsf_req
;
669 struct fsf_qtcb qtcb
;
672 /********************** ZFCP SPECIFIC DEFINES ********************************/
674 #define ZFCP_REQ_AUTO_CLEANUP 0x00000002
675 #define ZFCP_REQ_NO_QTCB 0x00000008
677 #define ZFCP_SET 0x00000100
678 #define ZFCP_CLEAR 0x00000200
680 #ifndef atomic_test_mask
681 #define atomic_test_mask(mask, target) \
682 ((atomic_read(target) & mask) == mask)
685 #define zfcp_get_busid_by_adapter(adapter) (adapter->ccw_device->dev.bus_id)
686 #define zfcp_get_busid_by_port(port) (zfcp_get_busid_by_adapter(port->adapter))
687 #define zfcp_get_busid_by_unit(unit) (zfcp_get_busid_by_port(unit->port))
690 * Helper functions for request ID management.
692 static inline int zfcp_reqlist_hash(unsigned long req_id
)
694 return req_id
% REQUEST_LIST_SIZE
;
697 static inline void zfcp_reqlist_remove(struct zfcp_adapter
*adapter
,
698 struct zfcp_fsf_req
*fsf_req
)
700 list_del(&fsf_req
->list
);
703 static inline struct zfcp_fsf_req
*
704 zfcp_reqlist_find(struct zfcp_adapter
*adapter
, unsigned long req_id
)
706 struct zfcp_fsf_req
*request
;
709 idx
= zfcp_reqlist_hash(req_id
);
710 list_for_each_entry(request
, &adapter
->req_list
[idx
], list
)
711 if (request
->req_id
== req_id
)
716 static inline struct zfcp_fsf_req
*
717 zfcp_reqlist_find_safe(struct zfcp_adapter
*adapter
, struct zfcp_fsf_req
*req
)
719 struct zfcp_fsf_req
*request
;
722 for (idx
= 0; idx
< REQUEST_LIST_SIZE
; idx
++) {
723 list_for_each_entry(request
, &adapter
->req_list
[idx
], list
)
731 * functions needed for reference/usage counting
735 zfcp_unit_get(struct zfcp_unit
*unit
)
737 atomic_inc(&unit
->refcount
);
741 zfcp_unit_put(struct zfcp_unit
*unit
)
743 if (atomic_dec_return(&unit
->refcount
) == 0)
744 wake_up(&unit
->remove_wq
);
748 zfcp_unit_wait(struct zfcp_unit
*unit
)
750 wait_event(unit
->remove_wq
, atomic_read(&unit
->refcount
) == 0);
754 zfcp_port_get(struct zfcp_port
*port
)
756 atomic_inc(&port
->refcount
);
760 zfcp_port_put(struct zfcp_port
*port
)
762 if (atomic_dec_return(&port
->refcount
) == 0)
763 wake_up(&port
->remove_wq
);
767 zfcp_port_wait(struct zfcp_port
*port
)
769 wait_event(port
->remove_wq
, atomic_read(&port
->refcount
) == 0);
773 zfcp_adapter_get(struct zfcp_adapter
*adapter
)
775 atomic_inc(&adapter
->refcount
);
779 zfcp_adapter_put(struct zfcp_adapter
*adapter
)
781 if (atomic_dec_return(&adapter
->refcount
) == 0)
782 wake_up(&adapter
->remove_wq
);
786 zfcp_adapter_wait(struct zfcp_adapter
*adapter
)
788 wait_event(adapter
->remove_wq
, atomic_read(&adapter
->refcount
) == 0);
791 #endif /* ZFCP_DEF_H */