1 /*
2 * zfcp device driver
3 *
4 * Global definitions for the zfcp device driver.
5 *
6 * Copyright IBM Corporation 2002, 2008
7 */
8
9 #ifndef ZFCP_DEF_H
10 #define ZFCP_DEF_H
11
12 /*************************** INCLUDES *****************************************/
13
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>
33 #include <asm/qdio.h>
34 #include <asm/debug.h>
35 #include <asm/ebcdic.h>
36 #include <asm/sysinfo.h>
37 #include "zfcp_dbf.h"
38 #include "zfcp_fsf.h"
39
40
41 /********************* GENERAL DEFINES *********************************/
42
43 #define REQUEST_LIST_SIZE 128
44
45 /********************* SCSI SPECIFIC DEFINES *********************************/
46 #define ZFCP_SCSI_ER_TIMEOUT (10*HZ)
47
48 /********************* CIO/QDIO SPECIFIC DEFINES *****************************/
49
50 /* Adapter Identification Parameters */
51 #define ZFCP_CONTROL_UNIT_TYPE 0x1731
52 #define ZFCP_CONTROL_UNIT_MODEL 0x03
53 #define ZFCP_DEVICE_TYPE 0x1732
54 #define ZFCP_DEVICE_MODEL 0x03
55 #define ZFCP_DEVICE_MODEL_PRIV 0x04
56
57 /* DMQ bug workaround: don't use last SBALE */
58 #define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
59
60 /* index of last SBALE (with respect to DMQ bug workaround) */
61 #define ZFCP_LAST_SBALE_PER_SBAL (ZFCP_MAX_SBALES_PER_SBAL - 1)
62
63 /* max. number of (data buffer) SBALEs in largest SBAL chain */
64 #define ZFCP_MAX_SBALES_PER_REQ \
65 (FSF_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2)
66 /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */
67
68 #define ZFCP_MAX_SECTORS (ZFCP_MAX_SBALES_PER_REQ * 8)
69 /* max. number of (data buffer) SBALEs in largest SBAL chain
70 multiplied with number of sectors per 4k block */
71
72 /********************* FSF SPECIFIC DEFINES *********************************/
73
74 /* ATTENTION: value must not be used by hardware */
75 #define FSF_QTCB_UNSOLICITED_STATUS 0x6305
76
77 /* timeout value for "default timer" for fsf requests */
78 #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ)
79
80 /*************** FIBRE CHANNEL PROTOCOL SPECIFIC DEFINES ********************/
81
82 /* timeout for name-server lookup (in seconds) */
83 #define ZFCP_NS_GID_PN_TIMEOUT 10
84
85 /* task attribute values in FCP-2 FCP_CMND IU */
86 #define SIMPLE_Q 0
87 #define HEAD_OF_Q 1
88 #define ORDERED_Q 2
89 #define ACA_Q 4
90 #define UNTAGGED 5
91
92 /* task management flags in FCP-2 FCP_CMND IU */
93 #define FCP_CLEAR_ACA 0x40
94 #define FCP_TARGET_RESET 0x20
95 #define FCP_LOGICAL_UNIT_RESET 0x10
96 #define FCP_CLEAR_TASK_SET 0x04
97 #define FCP_ABORT_TASK_SET 0x02
98
99 #define FCP_CDB_LENGTH 16
100
101 #define ZFCP_DID_MASK 0x00FFFFFF
102
103 /* FCP(-2) FCP_CMND IU */
104 struct fcp_cmnd_iu {
105 u64 fcp_lun; /* FCP logical unit number */
106 u8 crn; /* command reference number */
107 u8 reserved0:5; /* reserved */
108 u8 task_attribute:3; /* task attribute */
109 u8 task_management_flags; /* task management flags */
110 u8 add_fcp_cdb_length:6; /* additional FCP_CDB length */
111 u8 rddata:1; /* read data */
112 u8 wddata:1; /* write data */
113 u8 fcp_cdb[FCP_CDB_LENGTH];
114 } __attribute__((packed));
115
116 /* FCP(-2) FCP_RSP IU */
117 struct fcp_rsp_iu {
118 u8 reserved0[10];
119 union {
120 struct {
121 u8 reserved1:3;
122 u8 fcp_conf_req:1;
123 u8 fcp_resid_under:1;
124 u8 fcp_resid_over:1;
125 u8 fcp_sns_len_valid:1;
126 u8 fcp_rsp_len_valid:1;
127 } bits;
128 u8 value;
129 } validity;
130 u8 scsi_status;
131 u32 fcp_resid;
132 u32 fcp_sns_len;
133 u32 fcp_rsp_len;
134 } __attribute__((packed));
135
136
137 #define RSP_CODE_GOOD 0
138 #define RSP_CODE_LENGTH_MISMATCH 1
139 #define RSP_CODE_FIELD_INVALID 2
140 #define RSP_CODE_RO_MISMATCH 3
141 #define RSP_CODE_TASKMAN_UNSUPP 4
142 #define RSP_CODE_TASKMAN_FAILED 5
143
144 /* see fc-fs */
145 #define LS_RSCN 0x61
146 #define LS_LOGO 0x05
147 #define LS_PLOGI 0x03
148
149 struct fcp_rscn_head {
150 u8 command;
151 u8 page_length; /* always 0x04 */
152 u16 payload_len;
153 } __attribute__((packed));
154
155 struct fcp_rscn_element {
156 u8 reserved:2;
157 u8 event_qual:4;
158 u8 addr_format:2;
159 u32 nport_did:24;
160 } __attribute__((packed));
161
162 /* see fc-ph */
163 struct fcp_logo {
164 u32 command;
165 u32 nport_did;
166 u64 nport_wwpn;
167 } __attribute__((packed));
168
169 /*
170 * FC-FS stuff
171 */
172 #define R_A_TOV 10 /* seconds */
173
174 #define ZFCP_LS_RLS 0x0f
175 #define ZFCP_LS_ADISC 0x52
176 #define ZFCP_LS_RPS 0x56
177 #define ZFCP_LS_RSCN 0x61
178 #define ZFCP_LS_RNID 0x78
179
180 struct zfcp_ls_adisc {
181 u8 code;
182 u8 field[3];
183 u32 hard_nport_id;
184 u64 wwpn;
185 u64 wwnn;
186 u32 nport_id;
187 } __attribute__ ((packed));
188
189 /*
190 * FC-GS-2 stuff
191 */
192 #define ZFCP_CT_REVISION 0x01
193 #define ZFCP_CT_DIRECTORY_SERVICE 0xFC
194 #define ZFCP_CT_NAME_SERVER 0x02
195 #define ZFCP_CT_SYNCHRONOUS 0x00
196 #define ZFCP_CT_SCSI_FCP 0x08
197 #define ZFCP_CT_UNABLE_TO_PERFORM_CMD 0x09
198 #define ZFCP_CT_GID_PN 0x0121
199 #define ZFCP_CT_GPN_FT 0x0172
200 #define ZFCP_CT_ACCEPT 0x8002
201 #define ZFCP_CT_REJECT 0x8001
202
203 /*
204 * FC-GS-4 stuff
205 */
206 #define ZFCP_CT_TIMEOUT (3 * R_A_TOV)
207
208 /*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/
209
210 /*
211 * Note, the leftmost status byte is common among adapter, port
212 * and unit
213 */
214 #define ZFCP_COMMON_FLAGS 0xfff00000
215
216 /* common status bits */
217 #define ZFCP_STATUS_COMMON_REMOVE 0x80000000
218 #define ZFCP_STATUS_COMMON_RUNNING 0x40000000
219 #define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000
220 #define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000
221 #define ZFCP_STATUS_COMMON_OPEN 0x04000000
222 #define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000
223 #define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000
224 #define ZFCP_STATUS_COMMON_ACCESS_BOXED 0x00400000
225 #define ZFCP_STATUS_COMMON_NOESC 0x00200000
226
227 /* adapter status */
228 #define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002
229 #define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008
230 #define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010
231 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_UP 0x00000020
232 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL 0x00000080
233 #define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100
234 #define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200
235
236 /* FC-PH/FC-GS well-known address identifiers for generic services */
237 #define ZFCP_DID_WKA 0xFFFFF0
238 #define ZFCP_DID_MANAGEMENT_SERVICE 0xFFFFFA
239 #define ZFCP_DID_TIME_SERVICE 0xFFFFFB
240 #define ZFCP_DID_DIRECTORY_SERVICE 0xFFFFFC
241 #define ZFCP_DID_ALIAS_SERVICE 0xFFFFF8
242 #define ZFCP_DID_KEY_DISTRIBUTION_SERVICE 0xFFFFF7
243
244 /* remote port status */
245 #define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001
246 #define ZFCP_STATUS_PORT_PHYS_CLOSING 0x00000004
247 #define ZFCP_STATUS_PORT_NO_WWPN 0x00000008
248 #define ZFCP_STATUS_PORT_INVALID_WWPN 0x00000020
249
250 /* well known address (WKA) port status*/
251 enum zfcp_wka_status {
252 ZFCP_WKA_PORT_OFFLINE,
253 ZFCP_WKA_PORT_CLOSING,
254 ZFCP_WKA_PORT_OPENING,
255 ZFCP_WKA_PORT_ONLINE,
256 };
257
258 /* logical unit status */
259 #define ZFCP_STATUS_UNIT_SHARED 0x00000004
260 #define ZFCP_STATUS_UNIT_READONLY 0x00000008
261 #define ZFCP_STATUS_UNIT_REGISTERED 0x00000010
262 #define ZFCP_STATUS_UNIT_SCSI_WORK_PENDING 0x00000020
263
264 /* FSF request status (this does not have a common part) */
265 #define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT 0x00000002
266 #define ZFCP_STATUS_FSFREQ_COMPLETED 0x00000004
267 #define ZFCP_STATUS_FSFREQ_ERROR 0x00000008
268 #define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010
269 #define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040
270 #define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080
271 #define ZFCP_STATUS_FSFREQ_ABORTED 0x00000100
272 #define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200
273 #define ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP 0x00000400
274 #define ZFCP_STATUS_FSFREQ_RETRY 0x00000800
275 #define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000
276
277 /************************* STRUCTURE DEFINITIONS *****************************/
278
279 struct zfcp_fsf_req;
280
281 /* holds various memory pools of an adapter */
282 struct zfcp_adapter_mempool {
283 mempool_t *fsf_req_erp;
284 mempool_t *fsf_req_scsi;
285 mempool_t *fsf_req_abort;
286 mempool_t *fsf_req_status_read;
287 mempool_t *data_status_read;
288 mempool_t *data_gid_pn;
289 };
290
291 /*
292 * header for CT_IU
293 */
294 struct ct_hdr {
295 u8 revision; // 0x01
296 u8 in_id[3]; // 0x00
297 u8 gs_type; // 0xFC Directory Service
298 u8 gs_subtype; // 0x02 Name Server
299 u8 options; // 0x00 single bidirectional exchange
300 u8 reserved0;
301 u16 cmd_rsp_code; // 0x0121 GID_PN, or 0x0100 GA_NXT
302 u16 max_res_size; // <= (4096 - 16) / 4
303 u8 reserved1;
304 u8 reason_code;
305 u8 reason_code_expl;
306 u8 vendor_unique;
307 } __attribute__ ((packed));
308
309 /* nameserver request CT_IU -- for requests where
310 * a port name is required */
311 struct ct_iu_gid_pn_req {
312 struct ct_hdr header;
313 u64 wwpn;
314 } __attribute__ ((packed));
315
316 /* FS_ACC IU and data unit for GID_PN nameserver request */
317 struct ct_iu_gid_pn_resp {
318 struct ct_hdr header;
319 u32 d_id;
320 } __attribute__ ((packed));
321
322 /**
323 * struct zfcp_send_ct - used to pass parameters to function zfcp_fsf_send_ct
324 * @wka_port: port where the request is sent to
325 * @req: scatter-gather list for request
326 * @resp: scatter-gather list for response
327 * @handler: handler function (called for response to the request)
328 * @handler_data: data passed to handler function
329 * @timeout: FSF timeout for this request
330 * @completion: completion for synchronization purposes
331 * @status: used to pass error status to calling function
332 */
333 struct zfcp_send_ct {
334 struct zfcp_wka_port *wka_port;
335 struct scatterlist *req;
336 struct scatterlist *resp;
337 void (*handler)(unsigned long);
338 unsigned long handler_data;
339 int timeout;
340 struct completion *completion;
341 int status;
342 };
343
344 /* used for name server requests in error recovery */
345 struct zfcp_gid_pn_data {
346 struct zfcp_send_ct ct;
347 struct scatterlist req;
348 struct scatterlist resp;
349 struct ct_iu_gid_pn_req ct_iu_req;
350 struct ct_iu_gid_pn_resp ct_iu_resp;
351 struct zfcp_port *port;
352 };
353
354 /**
355 * struct zfcp_send_els - used to pass parameters to function zfcp_fsf_send_els
356 * @adapter: adapter where request is sent from
357 * @port: port where ELS is destinated (port reference count has to be increased)
358 * @d_id: destiniation id of port where request is sent to
359 * @req: scatter-gather list for request
360 * @resp: scatter-gather list for response
361 * @handler: handler function (called for response to the request)
362 * @handler_data: data passed to handler function
363 * @completion: completion for synchronization purposes
364 * @ls_code: hex code of ELS command
365 * @status: used to pass error status to calling function
366 */
367 struct zfcp_send_els {
368 struct zfcp_adapter *adapter;
369 struct zfcp_port *port;
370 u32 d_id;
371 struct scatterlist *req;
372 struct scatterlist *resp;
373 void (*handler)(unsigned long);
374 unsigned long handler_data;
375 struct completion *completion;
376 int ls_code;
377 int status;
378 };
379
380 struct zfcp_wka_port {
381 struct zfcp_adapter *adapter;
382 wait_queue_head_t completion_wq;
383 enum zfcp_wka_status status;
384 atomic_t refcount;
385 u32 d_id;
386 u32 handle;
387 struct mutex mutex;
388 struct delayed_work work;
389 };
390
391 struct zfcp_qdio_queue {
392 struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q];
393 u8 first; /* index of next free bfr in queue */
394 atomic_t count; /* number of free buffers in queue */
395 };
396
397 struct zfcp_erp_action {
398 struct list_head list;
399 int action; /* requested action code */
400 struct zfcp_adapter *adapter; /* device which should be recovered */
401 struct zfcp_port *port;
402 struct zfcp_unit *unit;
403 u32 status; /* recovery status */
404 u32 step; /* active step of this erp action */
405 struct zfcp_fsf_req *fsf_req; /* fsf request currently pending
406 for this action */
407 struct timer_list timer;
408 };
409
410 struct fsf_latency_record {
411 u32 min;
412 u32 max;
413 u64 sum;
414 };
415
416 struct latency_cont {
417 struct fsf_latency_record channel;
418 struct fsf_latency_record fabric;
419 u64 counter;
420 };
421
422 struct zfcp_latencies {
423 struct latency_cont read;
424 struct latency_cont write;
425 struct latency_cont cmd;
426 spinlock_t lock;
427 };
428
429 struct zfcp_adapter {
430 atomic_t refcount; /* reference count */
431 wait_queue_head_t remove_wq; /* can be used to wait for
432 refcount drop to zero */
433 u64 peer_wwnn; /* P2P peer WWNN */
434 u64 peer_wwpn; /* P2P peer WWPN */
435 u32 peer_d_id; /* P2P peer D_ID */
436 struct ccw_device *ccw_device; /* S/390 ccw device */
437 u32 hydra_version; /* Hydra version */
438 u32 fsf_lic_version;
439 u32 adapter_features; /* FCP channel features */
440 u32 connection_features; /* host connection features */
441 u32 hardware_version; /* of FCP channel */
442 u16 timer_ticks; /* time int for a tick */
443 struct Scsi_Host *scsi_host; /* Pointer to mid-layer */
444 struct list_head port_list_head; /* remote port list */
445 unsigned long req_no; /* unique FSF req number */
446 struct list_head *req_list; /* list of pending reqs */
447 spinlock_t req_list_lock; /* request list lock */
448 struct zfcp_qdio_queue req_q; /* request queue */
449 spinlock_t req_q_lock; /* for operations on queue */
450 int req_q_pci_batch; /* SBALs since PCI indication
451 was last set */
452 u32 fsf_req_seq_no; /* FSF cmnd seq number */
453 wait_queue_head_t request_wq; /* can be used to wait for
454 more avaliable SBALs */
455 struct zfcp_qdio_queue resp_q; /* response queue */
456 rwlock_t abort_lock; /* Protects against SCSI
457 stack abort/command
458 completion races */
459 atomic_t stat_miss; /* # missing status reads*/
460 struct work_struct stat_work;
461 atomic_t status; /* status of this adapter */
462 struct list_head erp_ready_head; /* error recovery for this
463 adapter/devices */
464 struct list_head erp_running_head;
465 rwlock_t erp_lock;
466 struct semaphore erp_ready_sem;
467 wait_queue_head_t erp_thread_wqh;
468 wait_queue_head_t erp_done_wqh;
469 struct zfcp_erp_action erp_action; /* pending error recovery */
470 atomic_t erp_counter;
471 u32 erp_total_count; /* total nr of enqueued erp
472 actions */
473 u32 erp_low_mem_count; /* nr of erp actions waiting
474 for memory */
475 struct zfcp_wka_port nsp; /* adapter's nameserver */
476 debug_info_t *rec_dbf;
477 debug_info_t *hba_dbf;
478 debug_info_t *san_dbf; /* debug feature areas */
479 debug_info_t *scsi_dbf;
480 spinlock_t rec_dbf_lock;
481 spinlock_t hba_dbf_lock;
482 spinlock_t san_dbf_lock;
483 spinlock_t scsi_dbf_lock;
484 struct zfcp_rec_dbf_record rec_dbf_buf;
485 struct zfcp_hba_dbf_record hba_dbf_buf;
486 struct zfcp_san_dbf_record san_dbf_buf;
487 struct zfcp_scsi_dbf_record scsi_dbf_buf;
488 struct zfcp_adapter_mempool pool; /* Adapter memory pools */
489 struct qdio_initialize qdio_init_data; /* for qdio_establish */
490 struct fc_host_statistics *fc_stats;
491 struct fsf_qtcb_bottom_port *stats_reset_data;
492 unsigned long stats_reset;
493 struct work_struct scan_work;
494 struct service_level service_level;
495 atomic_t qdio_outb_full; /* queue full incidents */
496 };
497
498 struct zfcp_port {
499 struct device sysfs_device; /* sysfs device */
500 struct fc_rport *rport; /* rport of fc transport class */
501 struct list_head list; /* list of remote ports */
502 atomic_t refcount; /* reference count */
503 wait_queue_head_t remove_wq; /* can be used to wait for
504 refcount drop to zero */
505 struct zfcp_adapter *adapter; /* adapter used to access port */
506 struct list_head unit_list_head; /* head of logical unit list */
507 atomic_t status; /* status of this remote port */
508 u64 wwnn; /* WWNN if known */
509 u64 wwpn; /* WWPN */
510 u32 d_id; /* D_ID */
511 u32 handle; /* handle assigned by FSF */
512 struct zfcp_erp_action erp_action; /* pending error recovery */
513 atomic_t erp_counter;
514 u32 maxframe_size;
515 u32 supported_classes;
516 struct work_struct gid_pn_work;
517 };
518
519 struct zfcp_unit {
520 struct device sysfs_device; /* sysfs device */
521 struct list_head list; /* list of logical units */
522 atomic_t refcount; /* reference count */
523 wait_queue_head_t remove_wq; /* can be used to wait for
524 refcount drop to zero */
525 struct zfcp_port *port; /* remote port of unit */
526 atomic_t status; /* status of this logical unit */
527 u64 fcp_lun; /* own FCP_LUN */
528 u32 handle; /* handle assigned by FSF */
529 struct scsi_device *device; /* scsi device struct pointer */
530 struct zfcp_erp_action erp_action; /* pending error recovery */
531 atomic_t erp_counter;
532 struct zfcp_latencies latencies;
533 };
534
535 /* FSF request */
536 struct zfcp_fsf_req {
537 struct list_head list; /* list of FSF requests */
538 unsigned long req_id; /* unique request ID */
539 struct zfcp_adapter *adapter; /* adapter request belongs to */
540 u8 sbal_number; /* nr of SBALs free for use */
541 u8 sbal_first; /* first SBAL for this request */
542 u8 sbal_last; /* last SBAL for this request */
543 u8 sbal_limit; /* last possible SBAL for
544 this reuest */
545 u8 sbale_curr; /* current SBALE during creation
546 of request */
547 u8 sbal_response; /* SBAL used in interrupt */
548 wait_queue_head_t completion_wq; /* can be used by a routine
549 to wait for completion */
550 u32 status; /* status of this request */
551 u32 fsf_command; /* FSF Command copy */
552 struct fsf_qtcb *qtcb; /* address of associated QTCB */
553 u32 seq_no; /* Sequence number of request */
554 void *data; /* private data of request */
555 struct timer_list timer; /* used for erp or scsi er */
556 struct zfcp_erp_action *erp_action; /* used if this request is
557 issued on behalf of erp */
558 mempool_t *pool; /* used if request was alloacted
559 from emergency pool */
560 unsigned long long issued; /* request sent time (STCK) */
561 struct zfcp_unit *unit;
562 void (*handler)(struct zfcp_fsf_req *);
563 u16 qdio_outb_usage;/* usage of outbound queue */
564 u16 qdio_inb_usage; /* usage of inbound queue */
565 };
566
567 /* driver data */
568 struct zfcp_data {
569 struct scsi_host_template scsi_host_template;
570 struct scsi_transport_template *scsi_transport_template;
571 rwlock_t config_lock; /* serialises changes
572 to adapter/port/unit
573 lists */
574 struct semaphore config_sema; /* serialises configuration
575 changes */
576 struct kmem_cache *fsf_req_qtcb_cache;
577 struct kmem_cache *sr_buffer_cache;
578 struct kmem_cache *gid_pn_cache;
579 struct workqueue_struct *work_queue;
580 };
581
582 /* struct used by memory pools for fsf_requests */
583 struct zfcp_fsf_req_qtcb {
584 struct zfcp_fsf_req fsf_req;
585 struct fsf_qtcb qtcb;
586 };
587
588 /********************** ZFCP SPECIFIC DEFINES ********************************/
589
590 #define ZFCP_REQ_AUTO_CLEANUP 0x00000002
591 #define ZFCP_REQ_NO_QTCB 0x00000008
592
593 #define ZFCP_SET 0x00000100
594 #define ZFCP_CLEAR 0x00000200
595
596 /*
597 * Helper functions for request ID management.
598 */
zfcp_reqlist_hash(unsigned long req_id)599 static inline int zfcp_reqlist_hash(unsigned long req_id)
600 {
601 return req_id % REQUEST_LIST_SIZE;
602 }
603
zfcp_reqlist_remove(struct zfcp_adapter * adapter,struct zfcp_fsf_req * fsf_req)604 static inline void zfcp_reqlist_remove(struct zfcp_adapter *adapter,
605 struct zfcp_fsf_req *fsf_req)
606 {
607 list_del(&fsf_req->list);
608 }
609
610 static inline struct zfcp_fsf_req *
zfcp_reqlist_find(struct zfcp_adapter * adapter,unsigned long req_id)611 zfcp_reqlist_find(struct zfcp_adapter *adapter, unsigned long req_id)
612 {
613 struct zfcp_fsf_req *request;
614 unsigned int idx;
615
616 idx = zfcp_reqlist_hash(req_id);
617 list_for_each_entry(request, &adapter->req_list[idx], list)
618 if (request->req_id == req_id)
619 return request;
620 return NULL;
621 }
622
623 static inline struct zfcp_fsf_req *
zfcp_reqlist_find_safe(struct zfcp_adapter * adapter,struct zfcp_fsf_req * req)624 zfcp_reqlist_find_safe(struct zfcp_adapter *adapter, struct zfcp_fsf_req *req)
625 {
626 struct zfcp_fsf_req *request;
627 unsigned int idx;
628
629 for (idx = 0; idx < REQUEST_LIST_SIZE; idx++) {
630 list_for_each_entry(request, &adapter->req_list[idx], list)
631 if (request == req)
632 return request;
633 }
634 return NULL;
635 }
636
637 /*
638 * functions needed for reference/usage counting
639 */
640
641 static inline void
zfcp_unit_get(struct zfcp_unit * unit)642 zfcp_unit_get(struct zfcp_unit *unit)
643 {
644 atomic_inc(&unit->refcount);
645 }
646
647 static inline void
zfcp_unit_put(struct zfcp_unit * unit)648 zfcp_unit_put(struct zfcp_unit *unit)
649 {
650 if (atomic_dec_return(&unit->refcount) == 0)
651 wake_up(&unit->remove_wq);
652 }
653
654 static inline void
zfcp_port_get(struct zfcp_port * port)655 zfcp_port_get(struct zfcp_port *port)
656 {
657 atomic_inc(&port->refcount);
658 }
659
660 static inline void
zfcp_port_put(struct zfcp_port * port)661 zfcp_port_put(struct zfcp_port *port)
662 {
663 if (atomic_dec_return(&port->refcount) == 0)
664 wake_up(&port->remove_wq);
665 }
666
667 static inline void
zfcp_adapter_get(struct zfcp_adapter * adapter)668 zfcp_adapter_get(struct zfcp_adapter *adapter)
669 {
670 atomic_inc(&adapter->refcount);
671 }
672
673 static inline void
zfcp_adapter_put(struct zfcp_adapter * adapter)674 zfcp_adapter_put(struct zfcp_adapter *adapter)
675 {
676 if (atomic_dec_return(&adapter->refcount) == 0)
677 wake_up(&adapter->remove_wq);
678 }
679
680 #endif /* ZFCP_DEF_H */
681