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 #define ZFCP_TYPE2_RECOVERY_TIME 8 /* seconds */
96 /********************* FSF SPECIFIC DEFINES *********************************/
98 /* ATTENTION: value must not be used by hardware */
99 #define FSF_QTCB_UNSOLICITED_STATUS 0x6305
101 /* Do 1st retry in 1 second, then double the timeout for each following retry */
102 #define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP 1
103 #define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES 7
105 /* timeout value for "default timer" for fsf requests */
106 #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ)
108 /*************** FIBRE CHANNEL PROTOCOL SPECIFIC DEFINES ********************/
110 typedef unsigned long long wwn_t;
111 typedef unsigned long long fcp_lun_t;
112 /* data length field may be at variable position in FCP-2 FCP_CMND IU */
113 typedef unsigned int fcp_dl_t;
115 /* timeout for name-server lookup (in seconds) */
116 #define ZFCP_NS_GID_PN_TIMEOUT 10
118 /* task attribute values in FCP-2 FCP_CMND IU */
125 /* task management flags in FCP-2 FCP_CMND IU */
126 #define FCP_CLEAR_ACA 0x40
127 #define FCP_TARGET_RESET 0x20
128 #define FCP_LOGICAL_UNIT_RESET 0x10
129 #define FCP_CLEAR_TASK_SET 0x04
130 #define FCP_ABORT_TASK_SET 0x02
132 #define FCP_CDB_LENGTH 16
134 #define ZFCP_DID_MASK 0x00FFFFFF
136 /* FCP(-2) FCP_CMND IU */
138 fcp_lun_t fcp_lun; /* FCP logical unit number */
139 u8 crn; /* command reference number */
140 u8 reserved0:5; /* reserved */
141 u8 task_attribute:3; /* task attribute */
142 u8 task_management_flags; /* task management flags */
143 u8 add_fcp_cdb_length:6; /* additional FCP_CDB length */
144 u8 rddata:1; /* read data */
145 u8 wddata:1; /* write data */
146 u8 fcp_cdb[FCP_CDB_LENGTH];
147 } __attribute__((packed));
149 /* FCP(-2) FCP_RSP IU */
156 u8 fcp_resid_under:1;
158 u8 fcp_sns_len_valid:1;
159 u8 fcp_rsp_len_valid:1;
167 } __attribute__((packed));
170 #define RSP_CODE_GOOD 0
171 #define RSP_CODE_LENGTH_MISMATCH 1
172 #define RSP_CODE_FIELD_INVALID 2
173 #define RSP_CODE_RO_MISMATCH 3
174 #define RSP_CODE_TASKMAN_UNSUPP 4
175 #define RSP_CODE_TASKMAN_FAILED 5
180 #define LS_PLOGI 0x03
182 struct fcp_rscn_head {
184 u8 page_length; /* always 0x04 */
186 } __attribute__((packed));
188 struct fcp_rscn_element {
193 } __attribute__((packed));
195 #define ZFCP_PORT_ADDRESS 0x0
196 #define ZFCP_AREA_ADDRESS 0x1
197 #define ZFCP_DOMAIN_ADDRESS 0x2
198 #define ZFCP_FABRIC_ADDRESS 0x3
200 #define ZFCP_PORTS_RANGE_PORT 0xFFFFFF
201 #define ZFCP_PORTS_RANGE_AREA 0xFFFF00
202 #define ZFCP_PORTS_RANGE_DOMAIN 0xFF0000
203 #define ZFCP_PORTS_RANGE_FABRIC 0x000000
205 #define ZFCP_NO_PORTS_PER_AREA 0x100
206 #define ZFCP_NO_PORTS_PER_DOMAIN 0x10000
207 #define ZFCP_NO_PORTS_PER_FABRIC 0x1000000
214 } __attribute__((packed));
219 #define R_A_TOV 10 /* seconds */
221 #define ZFCP_LS_RLS 0x0f
222 #define ZFCP_LS_ADISC 0x52
223 #define ZFCP_LS_RPS 0x56
224 #define ZFCP_LS_RSCN 0x61
225 #define ZFCP_LS_RNID 0x78
227 struct zfcp_ls_rjt_par {
232 } __attribute__ ((packed));
234 struct zfcp_ls_adisc {
241 } __attribute__ ((packed));
243 struct zfcp_ls_adisc_acc {
250 } __attribute__ ((packed));
252 struct zfcp_rc_entry {
254 const char *description;
260 #define ZFCP_CT_REVISION 0x01
261 #define ZFCP_CT_DIRECTORY_SERVICE 0xFC
262 #define ZFCP_CT_NAME_SERVER 0x02
263 #define ZFCP_CT_SYNCHRONOUS 0x00
264 #define ZFCP_CT_SCSI_FCP 0x08
265 #define ZFCP_CT_UNABLE_TO_PERFORM_CMD 0x09
266 #define ZFCP_CT_GID_PN 0x0121
267 #define ZFCP_CT_GPN_FT 0x0172
268 #define ZFCP_CT_MAX_SIZE 0x1020
269 #define ZFCP_CT_ACCEPT 0x8002
270 #define ZFCP_CT_REJECT 0x8001
275 #define ZFCP_CT_TIMEOUT (3 * R_A_TOV)
277 /*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/
280 * Note, the leftmost status byte is common among adapter, port
283 #define ZFCP_COMMON_FLAGS 0xfff00000
285 /* common status bits */
286 #define ZFCP_STATUS_COMMON_REMOVE 0x80000000
287 #define ZFCP_STATUS_COMMON_RUNNING 0x40000000
288 #define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000
289 #define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000
290 #define ZFCP_STATUS_COMMON_OPENING 0x08000000
291 #define ZFCP_STATUS_COMMON_OPEN 0x04000000
292 #define ZFCP_STATUS_COMMON_CLOSING 0x02000000
293 #define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000
294 #define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000
295 #define ZFCP_STATUS_COMMON_ACCESS_BOXED 0x00400000
296 #define ZFCP_STATUS_COMMON_NOESC 0x00200000
299 #define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002
300 #define ZFCP_STATUS_ADAPTER_REGISTERED 0x00000004
301 #define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008
302 #define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010
303 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_UP 0x00000020
304 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL 0x00000080
305 #define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100
306 #define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200
307 #define ZFCP_STATUS_ADAPTER_XPORT_OK 0x00000800
309 /* FC-PH/FC-GS well-known address identifiers for generic services */
310 #define ZFCP_DID_MANAGEMENT_SERVICE 0xFFFFFA
311 #define ZFCP_DID_TIME_SERVICE 0xFFFFFB
312 #define ZFCP_DID_DIRECTORY_SERVICE 0xFFFFFC
313 #define ZFCP_DID_ALIAS_SERVICE 0xFFFFF8
314 #define ZFCP_DID_KEY_DISTRIBUTION_SERVICE 0xFFFFF7
316 /* remote port status */
317 #define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001
318 #define ZFCP_STATUS_PORT_DID_DID 0x00000002
319 #define ZFCP_STATUS_PORT_PHYS_CLOSING 0x00000004
320 #define ZFCP_STATUS_PORT_NO_WWPN 0x00000008
321 #define ZFCP_STATUS_PORT_NO_SCSI_ID 0x00000010
322 #define ZFCP_STATUS_PORT_INVALID_WWPN 0x00000020
324 /* for ports with well known addresses */
325 #define ZFCP_STATUS_PORT_WKA \
326 (ZFCP_STATUS_PORT_NO_WWPN | \
327 ZFCP_STATUS_PORT_NO_SCSI_ID)
329 /* logical unit status */
330 #define ZFCP_STATUS_UNIT_TEMPORARY 0x00000002
331 #define ZFCP_STATUS_UNIT_SHARED 0x00000004
332 #define ZFCP_STATUS_UNIT_READONLY 0x00000008
333 #define ZFCP_STATUS_UNIT_REGISTERED 0x00000010
334 #define ZFCP_STATUS_UNIT_SCSI_WORK_PENDING 0x00000020
336 /* FSF request status (this does not have a common part) */
337 #define ZFCP_STATUS_FSFREQ_NOT_INIT 0x00000000
338 #define ZFCP_STATUS_FSFREQ_POOL 0x00000001
339 #define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT 0x00000002
340 #define ZFCP_STATUS_FSFREQ_COMPLETED 0x00000004
341 #define ZFCP_STATUS_FSFREQ_ERROR 0x00000008
342 #define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010
343 #define ZFCP_STATUS_FSFREQ_ABORTING 0x00000020
344 #define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040
345 #define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080
346 #define ZFCP_STATUS_FSFREQ_ABORTED 0x00000100
347 #define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200
348 #define ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP 0x00000400
349 #define ZFCP_STATUS_FSFREQ_RETRY 0x00000800
350 #define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000
352 /*********************** ERROR RECOVERY PROCEDURE DEFINES ********************/
354 #define ZFCP_MAX_ERPS 3
356 #define ZFCP_ERP_FSFREQ_TIMEOUT (30 * HZ)
357 #define ZFCP_ERP_MEMWAIT_TIMEOUT HZ
359 #define ZFCP_STATUS_ERP_TIMEDOUT 0x10000000
360 #define ZFCP_STATUS_ERP_CLOSE_ONLY 0x01000000
361 #define ZFCP_STATUS_ERP_DISMISSING 0x00100000
362 #define ZFCP_STATUS_ERP_DISMISSED 0x00200000
363 #define ZFCP_STATUS_ERP_LOWMEM 0x00400000
365 #define ZFCP_ERP_STEP_UNINITIALIZED 0x00000000
366 #define ZFCP_ERP_STEP_FSF_XCONFIG 0x00000001
367 #define ZFCP_ERP_STEP_PHYS_PORT_CLOSING 0x00000010
368 #define ZFCP_ERP_STEP_PORT_CLOSING 0x00000100
369 #define ZFCP_ERP_STEP_NAMESERVER_OPEN 0x00000200
370 #define ZFCP_ERP_STEP_NAMESERVER_LOOKUP 0x00000400
371 #define ZFCP_ERP_STEP_PORT_OPENING 0x00000800
372 #define ZFCP_ERP_STEP_UNIT_CLOSING 0x00001000
373 #define ZFCP_ERP_STEP_UNIT_OPENING 0x00002000
375 /* Ordered by escalation level (necessary for proper erp-code operation) */
376 #define ZFCP_ERP_ACTION_REOPEN_ADAPTER 0x4
377 #define ZFCP_ERP_ACTION_REOPEN_PORT_FORCED 0x3
378 #define ZFCP_ERP_ACTION_REOPEN_PORT 0x2
379 #define ZFCP_ERP_ACTION_REOPEN_UNIT 0x1
381 #define ZFCP_ERP_ACTION_RUNNING 0x1
382 #define ZFCP_ERP_ACTION_READY 0x2
384 #define ZFCP_ERP_SUCCEEDED 0x0
385 #define ZFCP_ERP_FAILED 0x1
386 #define ZFCP_ERP_CONTINUES 0x2
387 #define ZFCP_ERP_EXIT 0x3
388 #define ZFCP_ERP_DISMISSED 0x4
389 #define ZFCP_ERP_NOMEM 0x5
391 /************************* STRUCTURE DEFINITIONS *****************************/
395 /* holds various memory pools of an adapter */
396 struct zfcp_adapter_mempool {
397 mempool_t *fsf_req_erp;
398 mempool_t *fsf_req_scsi;
399 mempool_t *fsf_req_abort;
400 mempool_t *fsf_req_status_read;
401 mempool_t *data_status_read;
402 mempool_t *data_gid_pn;
411 u8 gs_type; // 0xFC Directory Service
412 u8 gs_subtype; // 0x02 Name Server
413 u8 options; // 0x00 single bidirectional exchange
415 u16 cmd_rsp_code; // 0x0121 GID_PN, or 0x0100 GA_NXT
416 u16 max_res_size; // <= (4096 - 16) / 4
421 } __attribute__ ((packed));
423 /* nameserver request CT_IU -- for requests where
424 * a port name is required */
425 struct ct_iu_gid_pn_req {
426 struct ct_hdr header;
428 } __attribute__ ((packed));
430 /* FS_ACC IU and data unit for GID_PN nameserver request */
431 struct ct_iu_gid_pn_resp {
432 struct ct_hdr header;
434 } __attribute__ ((packed));
436 typedef void (*zfcp_send_ct_handler_t)(unsigned long);
439 * struct zfcp_send_ct - used to pass parameters to function zfcp_fsf_send_ct
440 * @port: port where the request is sent to
441 * @req: scatter-gather list for request
442 * @resp: scatter-gather list for response
443 * @req_count: number of elements in request scatter-gather list
444 * @resp_count: number of elements in response scatter-gather list
445 * @handler: handler function (called for response to the request)
446 * @handler_data: data passed to handler function
447 * @timeout: FSF timeout for this request
448 * @completion: completion for synchronization purposes
449 * @status: used to pass error status to calling function
451 struct zfcp_send_ct {
452 struct zfcp_port *port;
453 struct scatterlist *req;
454 struct scatterlist *resp;
455 unsigned int req_count;
456 unsigned int resp_count;
457 zfcp_send_ct_handler_t handler;
458 unsigned long handler_data;
460 struct completion *completion;
464 /* used for name server requests in error recovery */
465 struct zfcp_gid_pn_data {
466 struct zfcp_send_ct ct;
467 struct scatterlist req;
468 struct scatterlist resp;
469 struct ct_iu_gid_pn_req ct_iu_req;
470 struct ct_iu_gid_pn_resp ct_iu_resp;
471 struct zfcp_port *port;
474 typedef void (*zfcp_send_els_handler_t)(unsigned long);
477 * struct zfcp_send_els - used to pass parameters to function zfcp_fsf_send_els
478 * @adapter: adapter where request is sent from
479 * @port: port where ELS is destinated (port reference count has to be increased)
480 * @d_id: destiniation id of port where request is sent to
481 * @req: scatter-gather list for request
482 * @resp: scatter-gather list for response
483 * @req_count: number of elements in request scatter-gather list
484 * @resp_count: number of elements in response scatter-gather list
485 * @handler: handler function (called for response to the request)
486 * @handler_data: data passed to handler function
487 * @completion: completion for synchronization purposes
488 * @ls_code: hex code of ELS command
489 * @status: used to pass error status to calling function
491 struct zfcp_send_els {
492 struct zfcp_adapter *adapter;
493 struct zfcp_port *port;
495 struct scatterlist *req;
496 struct scatterlist *resp;
497 unsigned int req_count;
498 unsigned int resp_count;
499 zfcp_send_els_handler_t handler;
500 unsigned long handler_data;
501 struct completion *completion;
506 struct zfcp_qdio_queue {
507 struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */
508 u8 first; /* index of next free bfr
509 in queue (free_count>0) */
510 atomic_t count; /* number of free buffers
512 spinlock_t lock; /* lock for operations on queue */
513 int pci_batch; /* SBALs since PCI indication
517 struct zfcp_erp_action {
518 struct list_head list;
519 int action; /* requested action code */
520 struct zfcp_adapter *adapter; /* device which should be recovered */
521 struct zfcp_port *port;
522 struct zfcp_unit *unit;
523 volatile u32 status; /* recovery status */
524 u32 step; /* active step of this erp action */
525 struct zfcp_fsf_req *fsf_req; /* fsf request currently pending
527 struct timer_list timer;
530 struct fsf_latency_record {
536 struct latency_cont {
537 struct fsf_latency_record channel;
538 struct fsf_latency_record fabric;
542 struct zfcp_latencies {
543 struct latency_cont read;
544 struct latency_cont write;
545 struct latency_cont cmd;
549 struct zfcp_adapter {
550 struct list_head list; /* list of adapters */
551 atomic_t refcount; /* reference count */
552 wait_queue_head_t remove_wq; /* can be used to wait for
553 refcount drop to zero */
554 wwn_t peer_wwnn; /* P2P peer WWNN */
555 wwn_t peer_wwpn; /* P2P peer WWPN */
556 u32 peer_d_id; /* P2P peer D_ID */
557 struct ccw_device *ccw_device; /* S/390 ccw device */
558 u32 hydra_version; /* Hydra version */
560 u32 adapter_features; /* FCP channel features */
561 u32 connection_features; /* host connection features */
562 u32 hardware_version; /* of FCP channel */
563 u16 timer_ticks; /* time int for a tick */
564 struct Scsi_Host *scsi_host; /* Pointer to mid-layer */
565 struct list_head port_list_head; /* remote port list */
566 struct list_head port_remove_lh; /* head of ports to be
568 u32 ports; /* number of remote ports */
569 unsigned long req_no; /* unique FSF req number */
570 struct list_head *req_list; /* list of pending reqs */
571 spinlock_t req_list_lock; /* request list lock */
572 struct zfcp_qdio_queue req_q; /* request queue */
573 u32 fsf_req_seq_no; /* FSF cmnd seq number */
574 wait_queue_head_t request_wq; /* can be used to wait for
575 more avaliable SBALs */
576 struct zfcp_qdio_queue resp_q; /* response queue */
577 rwlock_t abort_lock; /* Protects against SCSI
580 atomic_t stat_miss; /* # missing status reads*/
581 struct work_struct stat_work;
582 atomic_t status; /* status of this adapter */
583 struct list_head erp_ready_head; /* error recovery for this
585 struct list_head erp_running_head;
587 struct semaphore erp_ready_sem;
588 wait_queue_head_t erp_thread_wqh;
589 wait_queue_head_t erp_done_wqh;
590 struct zfcp_erp_action erp_action; /* pending error recovery */
591 atomic_t erp_counter;
592 u32 erp_total_count; /* total nr of enqueued erp
594 u32 erp_low_mem_count; /* nr of erp actions waiting
596 struct zfcp_port *nameserver_port; /* adapter's nameserver */
597 debug_info_t *rec_dbf;
598 debug_info_t *hba_dbf;
599 debug_info_t *san_dbf; /* debug feature areas */
600 debug_info_t *scsi_dbf;
601 spinlock_t rec_dbf_lock;
602 spinlock_t hba_dbf_lock;
603 spinlock_t san_dbf_lock;
604 spinlock_t scsi_dbf_lock;
605 struct zfcp_rec_dbf_record rec_dbf_buf;
606 struct zfcp_hba_dbf_record hba_dbf_buf;
607 struct zfcp_san_dbf_record san_dbf_buf;
608 struct zfcp_scsi_dbf_record scsi_dbf_buf;
609 struct zfcp_adapter_mempool pool; /* Adapter memory pools */
610 struct qdio_initialize qdio_init_data; /* for qdio_establish */
611 struct device generic_services; /* directory for WKA ports */
612 struct fc_host_statistics *fc_stats;
613 struct fsf_qtcb_bottom_port *stats_reset_data;
614 unsigned long stats_reset;
615 struct work_struct scan_work;
619 struct device sysfs_device; /* sysfs device */
620 struct fc_rport *rport; /* rport of fc transport class */
621 struct list_head list; /* list of remote ports */
622 atomic_t refcount; /* reference count */
623 wait_queue_head_t remove_wq; /* can be used to wait for
624 refcount drop to zero */
625 struct zfcp_adapter *adapter; /* adapter used to access port */
626 struct list_head unit_list_head; /* head of logical unit list */
627 struct list_head unit_remove_lh; /* head of luns to be removed
629 u32 units; /* # of logical units in list */
630 atomic_t status; /* status of this remote port */
631 wwn_t wwnn; /* WWNN if known */
632 wwn_t wwpn; /* WWPN */
634 u32 handle; /* handle assigned by FSF */
635 struct zfcp_erp_action erp_action; /* pending error recovery */
636 atomic_t erp_counter;
638 u32 supported_classes;
642 struct device sysfs_device; /* sysfs device */
643 struct list_head list; /* list of logical units */
644 atomic_t refcount; /* reference count */
645 wait_queue_head_t remove_wq; /* can be used to wait for
646 refcount drop to zero */
647 struct zfcp_port *port; /* remote port of unit */
648 atomic_t status; /* status of this logical unit */
649 unsigned int scsi_lun; /* own SCSI LUN */
650 fcp_lun_t fcp_lun; /* own FCP_LUN */
651 u32 handle; /* handle assigned by FSF */
652 struct scsi_device *device; /* scsi device struct pointer */
653 struct zfcp_erp_action erp_action; /* pending error recovery */
654 atomic_t erp_counter;
655 struct zfcp_latencies latencies;
659 struct zfcp_fsf_req {
660 struct list_head list; /* list of FSF requests */
661 unsigned long req_id; /* unique request ID */
662 struct zfcp_adapter *adapter; /* adapter request belongs to */
663 u8 sbal_number; /* nr of SBALs free for use */
664 u8 sbal_first; /* first SBAL for this request */
665 u8 sbal_last; /* last SBAL for this request */
666 u8 sbal_limit; /* last possible SBAL for
668 u8 sbale_curr; /* current SBALE during creation
670 u8 sbal_response; /* SBAL used in interrupt */
671 wait_queue_head_t completion_wq; /* can be used by a routine
672 to wait for completion */
673 volatile u32 status; /* status of this request */
674 u32 fsf_command; /* FSF Command copy */
675 struct fsf_qtcb *qtcb; /* address of associated QTCB */
676 u32 seq_no; /* Sequence number of request */
677 void *data; /* private data of request */
678 struct timer_list timer; /* used for erp or scsi er */
679 struct zfcp_erp_action *erp_action; /* used if this request is
680 issued on behalf of erp */
681 mempool_t *pool; /* used if request was alloacted
682 from emergency pool */
683 unsigned long long issued; /* request sent time (STCK) */
684 struct zfcp_unit *unit;
685 void (*handler)(struct zfcp_fsf_req *);
690 struct scsi_host_template scsi_host_template;
691 struct scsi_transport_template *scsi_transport_template;
692 atomic_t status; /* Module status flags */
693 struct list_head adapter_list_head; /* head of adapter list */
694 struct list_head adapter_remove_lh; /* head of adapters to be
696 u32 adapters; /* # of adapters in list */
697 rwlock_t config_lock; /* serialises changes
700 struct semaphore config_sema; /* serialises configuration
702 atomic_t loglevel; /* current loglevel */
703 char init_busid[BUS_ID_SIZE];
705 fcp_lun_t init_fcp_lun;
706 struct kmem_cache *fsf_req_qtcb_cache;
707 struct kmem_cache *sr_buffer_cache;
708 struct kmem_cache *gid_pn_cache;
711 /* struct used by memory pools for fsf_requests */
712 struct zfcp_fsf_req_qtcb {
713 struct zfcp_fsf_req fsf_req;
714 struct fsf_qtcb qtcb;
717 /********************** ZFCP SPECIFIC DEFINES ********************************/
719 #define ZFCP_REQ_AUTO_CLEANUP 0x00000002
720 #define ZFCP_REQ_NO_QTCB 0x00000008
722 #define ZFCP_SET 0x00000100
723 #define ZFCP_CLEAR 0x00000200
725 #ifndef atomic_test_mask
726 #define atomic_test_mask(mask, target) \
727 ((atomic_read(target) & mask) == mask)
730 #define zfcp_get_busid_by_adapter(adapter) (adapter->ccw_device->dev.bus_id)
731 #define zfcp_get_busid_by_port(port) (zfcp_get_busid_by_adapter(port->adapter))
732 #define zfcp_get_busid_by_unit(unit) (zfcp_get_busid_by_port(unit->port))
735 * Helper functions for request ID management.
737 static inline int zfcp_reqlist_hash(unsigned long req_id)
739 return req_id % REQUEST_LIST_SIZE;
742 static inline void zfcp_reqlist_remove(struct zfcp_adapter *adapter,
743 struct zfcp_fsf_req *fsf_req)
745 list_del(&fsf_req->list);
748 static inline struct zfcp_fsf_req *
749 zfcp_reqlist_find(struct zfcp_adapter *adapter, unsigned long req_id)
751 struct zfcp_fsf_req *request;
754 idx = zfcp_reqlist_hash(req_id);
755 list_for_each_entry(request, &adapter->req_list[idx], list)
756 if (request->req_id == req_id)
761 static inline struct zfcp_fsf_req *
762 zfcp_reqlist_find_safe(struct zfcp_adapter *adapter, struct zfcp_fsf_req *req)
764 struct zfcp_fsf_req *request;
767 for (idx = 0; idx < REQUEST_LIST_SIZE; idx++) {
768 list_for_each_entry(request, &adapter->req_list[idx], list)
776 * functions needed for reference/usage counting
780 zfcp_unit_get(struct zfcp_unit *unit)
782 atomic_inc(&unit->refcount);
786 zfcp_unit_put(struct zfcp_unit *unit)
788 if (atomic_dec_return(&unit->refcount) == 0)
789 wake_up(&unit->remove_wq);
793 zfcp_unit_wait(struct zfcp_unit *unit)
795 wait_event(unit->remove_wq, atomic_read(&unit->refcount) == 0);
799 zfcp_port_get(struct zfcp_port *port)
801 atomic_inc(&port->refcount);
805 zfcp_port_put(struct zfcp_port *port)
807 if (atomic_dec_return(&port->refcount) == 0)
808 wake_up(&port->remove_wq);
812 zfcp_port_wait(struct zfcp_port *port)
814 wait_event(port->remove_wq, atomic_read(&port->refcount) == 0);
818 zfcp_adapter_get(struct zfcp_adapter *adapter)
820 atomic_inc(&adapter->refcount);
824 zfcp_adapter_put(struct zfcp_adapter *adapter)
826 if (atomic_dec_return(&adapter->refcount) == 0)
827 wake_up(&adapter->remove_wq);
831 zfcp_adapter_wait(struct zfcp_adapter *adapter)
833 wait_event(adapter->remove_wq, atomic_read(&adapter->refcount) == 0);
836 #endif /* ZFCP_DEF_H */