4 * Interface to Linux SCSI midlayer.
6 * Copyright IBM Corporation 2002, 2008
10 #include <asm/atomic.h>
12 static void zfcp_scsi_slave_destroy(struct scsi_device
*sdp
);
13 static int zfcp_scsi_slave_alloc(struct scsi_device
*sdp
);
14 static int zfcp_scsi_slave_configure(struct scsi_device
*sdp
);
15 static int zfcp_scsi_queuecommand(struct scsi_cmnd
*,
16 void (*done
) (struct scsi_cmnd
*));
17 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd
*);
18 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd
*);
19 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd
*);
20 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd
*);
21 static int zfcp_task_management_function(struct zfcp_unit
*, u8
,
24 static struct zfcp_unit
*zfcp_unit_lookup(struct zfcp_adapter
*, int,
25 unsigned int, unsigned int);
27 static struct device_attribute
*zfcp_sysfs_sdev_attrs
[];
28 static struct device_attribute
*zfcp_a_stats_attrs
[];
30 struct zfcp_data zfcp_data
= {
31 .scsi_host_template
= {
33 .module
= THIS_MODULE
,
35 .slave_alloc
= zfcp_scsi_slave_alloc
,
36 .slave_configure
= zfcp_scsi_slave_configure
,
37 .slave_destroy
= zfcp_scsi_slave_destroy
,
38 .queuecommand
= zfcp_scsi_queuecommand
,
39 .eh_abort_handler
= zfcp_scsi_eh_abort_handler
,
40 .eh_device_reset_handler
= zfcp_scsi_eh_device_reset_handler
,
41 .eh_target_reset_handler
= zfcp_scsi_eh_target_reset_handler
,
42 .eh_host_reset_handler
= zfcp_scsi_eh_host_reset_handler
,
45 .sg_tablesize
= ZFCP_MAX_SBALES_PER_REQ
,
48 .sdev_attrs
= zfcp_sysfs_sdev_attrs
,
49 .max_sectors
= ZFCP_MAX_SECTORS
,
50 .shost_attrs
= zfcp_a_stats_attrs
,
54 /* Find start of Response Information in FCP response unit*/
56 zfcp_get_fcp_rsp_info_ptr(struct fcp_rsp_iu
*fcp_rsp_iu
)
58 char *fcp_rsp_info_ptr
;
61 (unsigned char *) fcp_rsp_iu
+ (sizeof (struct fcp_rsp_iu
));
63 return fcp_rsp_info_ptr
;
66 /* Find start of Sense Information in FCP response unit*/
68 zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu
*fcp_rsp_iu
)
70 char *fcp_sns_info_ptr
;
73 (unsigned char *) fcp_rsp_iu
+ (sizeof (struct fcp_rsp_iu
));
74 if (fcp_rsp_iu
->validity
.bits
.fcp_rsp_len_valid
)
75 fcp_sns_info_ptr
= (char *) fcp_sns_info_ptr
+
76 fcp_rsp_iu
->fcp_rsp_len
;
78 return fcp_sns_info_ptr
;
82 zfcp_get_fcp_dl_ptr(struct fcp_cmnd_iu
* fcp_cmd
)
84 int additional_length
= fcp_cmd
->add_fcp_cdb_length
<< 2;
85 fcp_dl_t
*fcp_dl_addr
;
87 fcp_dl_addr
= (fcp_dl_t
*)
88 ((unsigned char *) fcp_cmd
+
89 sizeof (struct fcp_cmnd_iu
) + additional_length
);
91 * fcp_dl_addr = start address of fcp_cmnd structure +
92 * size of fixed part + size of dynamically sized add_dcp_cdb field
93 * SEE FCP-2 documentation
99 zfcp_get_fcp_dl(struct fcp_cmnd_iu
* fcp_cmd
)
101 return *zfcp_get_fcp_dl_ptr(fcp_cmd
);
105 zfcp_set_fcp_dl(struct fcp_cmnd_iu
*fcp_cmd
, fcp_dl_t fcp_dl
)
107 *zfcp_get_fcp_dl_ptr(fcp_cmd
) = fcp_dl
;
111 zfcp_scsi_slave_alloc(struct scsi_device
*sdp
)
113 struct zfcp_adapter
*adapter
;
114 struct zfcp_unit
*unit
;
118 adapter
= (struct zfcp_adapter
*) sdp
->host
->hostdata
[0];
122 read_lock_irqsave(&zfcp_data
.config_lock
, flags
);
123 unit
= zfcp_unit_lookup(adapter
, sdp
->channel
, sdp
->id
, sdp
->lun
);
124 if (unit
&& atomic_test_mask(ZFCP_STATUS_UNIT_REGISTERED
,
126 sdp
->hostdata
= unit
;
131 read_unlock_irqrestore(&zfcp_data
.config_lock
, flags
);
137 * zfcp_scsi_slave_destroy - called when scsi device is removed
139 * Remove reference to associated scsi device for an zfcp_unit.
140 * Mark zfcp_unit as failed. The scsi device might be deleted via sysfs
141 * or a scan for this device might have failed.
143 static void zfcp_scsi_slave_destroy(struct scsi_device
*sdpnt
)
145 struct zfcp_unit
*unit
= (struct zfcp_unit
*) sdpnt
->hostdata
;
148 atomic_clear_mask(ZFCP_STATUS_UNIT_REGISTERED
, &unit
->status
);
149 sdpnt
->hostdata
= NULL
;
151 zfcp_erp_unit_failed(unit
, 12, NULL
);
157 * called from scsi midlayer to allow finetuning of a device.
160 zfcp_scsi_slave_configure(struct scsi_device
*sdp
)
162 if (sdp
->tagged_supported
)
163 scsi_adjust_queue_depth(sdp
, MSG_SIMPLE_TAG
, ZFCP_CMND_PER_LUN
);
165 scsi_adjust_queue_depth(sdp
, 0, 1);
170 * zfcp_scsi_command_fail - set result in scsi_cmnd and call scsi_done function
171 * @scpnt: pointer to struct scsi_cmnd where result is set
172 * @result: result to be set in scpnt (e.g. DID_ERROR)
175 zfcp_scsi_command_fail(struct scsi_cmnd
*scpnt
, int result
)
177 set_host_byte(scpnt
, result
);
178 if ((scpnt
->device
!= NULL
) && (scpnt
->device
->host
!= NULL
))
179 zfcp_scsi_dbf_event_result("fail", 4,
180 (struct zfcp_adapter
*) scpnt
->device
->host
->hostdata
[0],
182 /* return directly */
183 scpnt
->scsi_done(scpnt
);
187 * zfcp_scsi_command_async - worker for zfcp_scsi_queuecommand and
188 * zfcp_scsi_command_sync
189 * @adapter: adapter where scsi command is issued
190 * @unit: unit to which scsi command is sent
191 * @scpnt: scsi command to be sent
192 * @timer: timer to be started if request is successfully initiated
194 * Note: In scsi_done function must be set in scpnt.
197 zfcp_scsi_command_async(struct zfcp_adapter
*adapter
, struct zfcp_unit
*unit
,
198 struct scsi_cmnd
*scpnt
, int use_timer
)
205 BUG_ON((adapter
== NULL
) || (adapter
!= unit
->port
->adapter
));
206 BUG_ON(scpnt
->scsi_done
== NULL
);
208 if (unlikely(NULL
== unit
)) {
209 zfcp_scsi_command_fail(scpnt
, DID_NO_CONNECT
);
214 atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED
, &unit
->status
) ||
215 !atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING
, &unit
->status
))) {
216 zfcp_scsi_command_fail(scpnt
, DID_ERROR
);
220 tmp
= zfcp_fsf_send_fcp_command_task(adapter
, unit
, scpnt
, use_timer
,
221 ZFCP_REQ_AUTO_CLEANUP
);
222 if (unlikely(tmp
== -EBUSY
)) {
223 zfcp_scsi_command_fail(scpnt
, DID_NO_CONNECT
);
227 if (unlikely(tmp
< 0))
228 retval
= SCSI_MLQUEUE_HOST_BUSY
;
235 zfcp_scsi_command_sync_handler(struct scsi_cmnd
*scpnt
)
237 struct completion
*wait
= (struct completion
*) scpnt
->SCp
.ptr
;
243 * zfcp_scsi_command_sync - send a SCSI command and wait for completion
244 * @unit: unit where command is sent to
245 * @scpnt: scsi command to be sent
246 * @use_timer: indicates whether timer should be setup or not
249 * Errors are indicated in scpnt->result
252 zfcp_scsi_command_sync(struct zfcp_unit
*unit
, struct scsi_cmnd
*scpnt
,
256 DECLARE_COMPLETION_ONSTACK(wait
);
258 scpnt
->SCp
.ptr
= (void *) &wait
; /* silent re-use */
259 scpnt
->scsi_done
= zfcp_scsi_command_sync_handler
;
260 ret
= zfcp_scsi_command_async(unit
->port
->adapter
, unit
, scpnt
,
263 wait_for_completion(&wait
);
265 scpnt
->SCp
.ptr
= NULL
;
271 * function: zfcp_scsi_queuecommand
273 * purpose: enqueues a SCSI command to the specified target device
275 * returns: 0 - success, SCSI command enqueued
279 zfcp_scsi_queuecommand(struct scsi_cmnd
*scpnt
,
280 void (*done
) (struct scsi_cmnd
*))
282 struct zfcp_unit
*unit
;
283 struct zfcp_adapter
*adapter
;
285 /* reset the status for this request */
287 scpnt
->host_scribble
= NULL
;
288 scpnt
->scsi_done
= done
;
291 * figure out adapter and target device
292 * (stored there by zfcp_scsi_slave_alloc)
294 adapter
= (struct zfcp_adapter
*) scpnt
->device
->host
->hostdata
[0];
295 unit
= (struct zfcp_unit
*) scpnt
->device
->hostdata
;
297 return zfcp_scsi_command_async(adapter
, unit
, scpnt
, 0);
300 static struct zfcp_unit
*
301 zfcp_unit_lookup(struct zfcp_adapter
*adapter
, int channel
, unsigned int id
,
304 struct zfcp_port
*port
;
305 struct zfcp_unit
*unit
, *retval
= NULL
;
307 list_for_each_entry(port
, &adapter
->port_list_head
, list
) {
308 if (!port
->rport
|| (id
!= port
->rport
->scsi_target_id
))
310 list_for_each_entry(unit
, &port
->unit_list_head
, list
)
311 if (lun
== unit
->scsi_lun
) {
321 * zfcp_scsi_eh_abort_handler - abort the specified SCSI command
322 * @scpnt: pointer to scsi_cmnd to be aborted
323 * Return: SUCCESS - command has been aborted and cleaned up in internal
324 * bookkeeping, SCSI stack won't be called for aborted command
327 * We do not need to care for a SCSI command which completes normally
328 * but late during this abort routine runs. We are allowed to return
329 * late commands to the SCSI stack. It tracks the state of commands and
330 * will handle late commands. (Usually, the normal completion of late
331 * commands is ignored with respect to the running abort operation.)
333 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd
*scpnt
)
335 struct Scsi_Host
*scsi_host
;
336 struct zfcp_adapter
*adapter
;
337 struct zfcp_unit
*unit
;
338 struct zfcp_fsf_req
*fsf_req
;
340 unsigned long old_req_id
;
341 int retval
= SUCCESS
;
343 scsi_host
= scpnt
->device
->host
;
344 adapter
= (struct zfcp_adapter
*) scsi_host
->hostdata
[0];
345 unit
= (struct zfcp_unit
*) scpnt
->device
->hostdata
;
347 /* avoid race condition between late normal completion and abort */
348 write_lock_irqsave(&adapter
->abort_lock
, flags
);
350 /* Check whether corresponding fsf_req is still pending */
351 spin_lock(&adapter
->req_list_lock
);
352 fsf_req
= zfcp_reqlist_find(adapter
,
353 (unsigned long) scpnt
->host_scribble
);
354 spin_unlock(&adapter
->req_list_lock
);
356 write_unlock_irqrestore(&adapter
->abort_lock
, flags
);
357 zfcp_scsi_dbf_event_abort("lte1", adapter
, scpnt
, NULL
, 0);
362 fsf_req
->status
|= ZFCP_STATUS_FSFREQ_ABORTING
;
363 old_req_id
= fsf_req
->req_id
;
365 /* don't access old fsf_req after releasing the abort_lock */
366 write_unlock_irqrestore(&adapter
->abort_lock
, flags
);
368 fsf_req
= zfcp_fsf_abort_fcp_command(old_req_id
, adapter
, unit
, 0);
370 zfcp_scsi_dbf_event_abort("nres", adapter
, scpnt
, NULL
,
376 __wait_event(fsf_req
->completion_wq
,
377 fsf_req
->status
& ZFCP_STATUS_FSFREQ_COMPLETED
);
379 if (fsf_req
->status
& ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED
) {
380 zfcp_scsi_dbf_event_abort("okay", adapter
, scpnt
, fsf_req
, 0);
382 } else if (fsf_req
->status
& ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED
) {
383 zfcp_scsi_dbf_event_abort("lte2", adapter
, scpnt
, fsf_req
, 0);
386 zfcp_scsi_dbf_event_abort("fail", adapter
, scpnt
, fsf_req
, 0);
389 zfcp_fsf_req_free(fsf_req
);
394 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd
*scpnt
)
397 struct zfcp_unit
*unit
= scpnt
->device
->hostdata
;
403 retval
= zfcp_task_management_function(unit
,
404 FCP_LOGICAL_UNIT_RESET
,
406 return retval
? FAILED
: SUCCESS
;
409 static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd
*scpnt
)
412 struct zfcp_unit
*unit
= scpnt
->device
->hostdata
;
418 retval
= zfcp_task_management_function(unit
, FCP_TARGET_RESET
, scpnt
);
419 return retval
? FAILED
: SUCCESS
;
423 zfcp_task_management_function(struct zfcp_unit
*unit
, u8 tm_flags
,
424 struct scsi_cmnd
*scpnt
)
426 struct zfcp_adapter
*adapter
= unit
->port
->adapter
;
427 struct zfcp_fsf_req
*fsf_req
;
430 /* issue task management function */
431 fsf_req
= zfcp_fsf_send_fcp_command_task_management
432 (adapter
, unit
, tm_flags
, 0);
434 zfcp_scsi_dbf_event_devreset("nres", tm_flags
, unit
, scpnt
);
439 __wait_event(fsf_req
->completion_wq
,
440 fsf_req
->status
& ZFCP_STATUS_FSFREQ_COMPLETED
);
443 * check completion status of task management function
445 if (fsf_req
->status
& ZFCP_STATUS_FSFREQ_TMFUNCFAILED
) {
446 zfcp_scsi_dbf_event_devreset("fail", tm_flags
, unit
, scpnt
);
448 } else if (fsf_req
->status
& ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP
) {
449 zfcp_scsi_dbf_event_devreset("nsup", tm_flags
, unit
, scpnt
);
452 zfcp_scsi_dbf_event_devreset("okay", tm_flags
, unit
, scpnt
);
454 zfcp_fsf_req_free(fsf_req
);
460 * zfcp_scsi_eh_host_reset_handler - handler for host reset
462 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd
*scpnt
)
464 struct zfcp_unit
*unit
;
465 struct zfcp_adapter
*adapter
;
467 unit
= (struct zfcp_unit
*) scpnt
->device
->hostdata
;
468 adapter
= unit
->port
->adapter
;
469 zfcp_erp_adapter_reopen(adapter
, 0, 141, scpnt
);
470 zfcp_erp_wait(adapter
);
476 zfcp_adapter_scsi_register(struct zfcp_adapter
*adapter
)
479 static unsigned int unique_id
= 0;
481 if (adapter
->scsi_host
)
484 /* register adapter as SCSI host with mid layer of SCSI stack */
485 adapter
->scsi_host
= scsi_host_alloc(&zfcp_data
.scsi_host_template
,
486 sizeof (struct zfcp_adapter
*));
487 if (!adapter
->scsi_host
) {
488 dev_err(&adapter
->ccw_device
->dev
,
489 "registration with SCSI stack failed.");
494 /* tell the SCSI stack some characteristics of this adapter */
495 adapter
->scsi_host
->max_id
= 1;
496 adapter
->scsi_host
->max_lun
= 1;
497 adapter
->scsi_host
->max_channel
= 0;
498 adapter
->scsi_host
->unique_id
= unique_id
++; /* FIXME */
499 adapter
->scsi_host
->max_cmd_len
= ZFCP_MAX_SCSI_CMND_LENGTH
;
500 adapter
->scsi_host
->transportt
= zfcp_data
.scsi_transport_template
;
503 * save a pointer to our own adapter data structure within
504 * hostdata field of SCSI host data structure
506 adapter
->scsi_host
->hostdata
[0] = (unsigned long) adapter
;
508 if (scsi_add_host(adapter
->scsi_host
, &adapter
->ccw_device
->dev
)) {
509 scsi_host_put(adapter
->scsi_host
);
513 atomic_set_mask(ZFCP_STATUS_ADAPTER_REGISTERED
, &adapter
->status
);
519 zfcp_adapter_scsi_unregister(struct zfcp_adapter
*adapter
)
521 struct Scsi_Host
*shost
;
522 struct zfcp_port
*port
;
524 shost
= adapter
->scsi_host
;
527 read_lock_irq(&zfcp_data
.config_lock
);
528 list_for_each_entry(port
, &adapter
->port_list_head
, list
)
531 read_unlock_irq(&zfcp_data
.config_lock
);
532 fc_remove_host(shost
);
533 scsi_remove_host(shost
);
534 scsi_host_put(shost
);
535 adapter
->scsi_host
= NULL
;
536 atomic_clear_mask(ZFCP_STATUS_ADAPTER_REGISTERED
, &adapter
->status
);
542 * Support functions for FC transport class
544 static struct fc_host_statistics
*
545 zfcp_init_fc_host_stats(struct zfcp_adapter
*adapter
)
547 struct fc_host_statistics
*fc_stats
;
549 if (!adapter
->fc_stats
) {
550 fc_stats
= kmalloc(sizeof(*fc_stats
), GFP_KERNEL
);
553 adapter
->fc_stats
= fc_stats
; /* freed in adater_dequeue */
555 memset(adapter
->fc_stats
, 0, sizeof(*adapter
->fc_stats
));
556 return adapter
->fc_stats
;
560 zfcp_adjust_fc_host_stats(struct fc_host_statistics
*fc_stats
,
561 struct fsf_qtcb_bottom_port
*data
,
562 struct fsf_qtcb_bottom_port
*old
)
564 fc_stats
->seconds_since_last_reset
= data
->seconds_since_last_reset
-
565 old
->seconds_since_last_reset
;
566 fc_stats
->tx_frames
= data
->tx_frames
- old
->tx_frames
;
567 fc_stats
->tx_words
= data
->tx_words
- old
->tx_words
;
568 fc_stats
->rx_frames
= data
->rx_frames
- old
->rx_frames
;
569 fc_stats
->rx_words
= data
->rx_words
- old
->rx_words
;
570 fc_stats
->lip_count
= data
->lip
- old
->lip
;
571 fc_stats
->nos_count
= data
->nos
- old
->nos
;
572 fc_stats
->error_frames
= data
->error_frames
- old
->error_frames
;
573 fc_stats
->dumped_frames
= data
->dumped_frames
- old
->dumped_frames
;
574 fc_stats
->link_failure_count
= data
->link_failure
- old
->link_failure
;
575 fc_stats
->loss_of_sync_count
= data
->loss_of_sync
- old
->loss_of_sync
;
576 fc_stats
->loss_of_signal_count
= data
->loss_of_signal
-
578 fc_stats
->prim_seq_protocol_err_count
= data
->psp_error_counts
-
579 old
->psp_error_counts
;
580 fc_stats
->invalid_tx_word_count
= data
->invalid_tx_words
-
581 old
->invalid_tx_words
;
582 fc_stats
->invalid_crc_count
= data
->invalid_crcs
- old
->invalid_crcs
;
583 fc_stats
->fcp_input_requests
= data
->input_requests
-
585 fc_stats
->fcp_output_requests
= data
->output_requests
-
586 old
->output_requests
;
587 fc_stats
->fcp_control_requests
= data
->control_requests
-
588 old
->control_requests
;
589 fc_stats
->fcp_input_megabytes
= data
->input_mb
- old
->input_mb
;
590 fc_stats
->fcp_output_megabytes
= data
->output_mb
- old
->output_mb
;
594 zfcp_set_fc_host_stats(struct fc_host_statistics
*fc_stats
,
595 struct fsf_qtcb_bottom_port
*data
)
597 fc_stats
->seconds_since_last_reset
= data
->seconds_since_last_reset
;
598 fc_stats
->tx_frames
= data
->tx_frames
;
599 fc_stats
->tx_words
= data
->tx_words
;
600 fc_stats
->rx_frames
= data
->rx_frames
;
601 fc_stats
->rx_words
= data
->rx_words
;
602 fc_stats
->lip_count
= data
->lip
;
603 fc_stats
->nos_count
= data
->nos
;
604 fc_stats
->error_frames
= data
->error_frames
;
605 fc_stats
->dumped_frames
= data
->dumped_frames
;
606 fc_stats
->link_failure_count
= data
->link_failure
;
607 fc_stats
->loss_of_sync_count
= data
->loss_of_sync
;
608 fc_stats
->loss_of_signal_count
= data
->loss_of_signal
;
609 fc_stats
->prim_seq_protocol_err_count
= data
->psp_error_counts
;
610 fc_stats
->invalid_tx_word_count
= data
->invalid_tx_words
;
611 fc_stats
->invalid_crc_count
= data
->invalid_crcs
;
612 fc_stats
->fcp_input_requests
= data
->input_requests
;
613 fc_stats
->fcp_output_requests
= data
->output_requests
;
614 fc_stats
->fcp_control_requests
= data
->control_requests
;
615 fc_stats
->fcp_input_megabytes
= data
->input_mb
;
616 fc_stats
->fcp_output_megabytes
= data
->output_mb
;
620 * zfcp_get_fc_host_stats - provide fc_host_statistics for scsi_transport_fc
622 * assumption: scsi_transport_fc synchronizes calls of
623 * get_fc_host_stats and reset_fc_host_stats
624 * (XXX to be checked otherwise introduce locking)
626 static struct fc_host_statistics
*
627 zfcp_get_fc_host_stats(struct Scsi_Host
*shost
)
629 struct zfcp_adapter
*adapter
;
630 struct fc_host_statistics
*fc_stats
;
631 struct fsf_qtcb_bottom_port
*data
;
634 adapter
= (struct zfcp_adapter
*)shost
->hostdata
[0];
635 fc_stats
= zfcp_init_fc_host_stats(adapter
);
639 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
643 ret
= zfcp_fsf_exchange_port_data_sync(adapter
, data
);
646 return NULL
; /* XXX return zeroed fc_stats? */
649 if (adapter
->stats_reset
&&
650 ((jiffies
/HZ
- adapter
->stats_reset
) <
651 data
->seconds_since_last_reset
)) {
652 zfcp_adjust_fc_host_stats(fc_stats
, data
,
653 adapter
->stats_reset_data
);
655 zfcp_set_fc_host_stats(fc_stats
, data
);
662 zfcp_reset_fc_host_stats(struct Scsi_Host
*shost
)
664 struct zfcp_adapter
*adapter
;
665 struct fsf_qtcb_bottom_port
*data
, *old_data
;
668 adapter
= (struct zfcp_adapter
*)shost
->hostdata
[0];
669 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
673 ret
= zfcp_fsf_exchange_port_data_sync(adapter
, data
);
677 adapter
->stats_reset
= jiffies
/HZ
;
678 old_data
= adapter
->stats_reset_data
;
679 adapter
->stats_reset_data
= data
; /* finally freed in
685 static void zfcp_get_host_port_state(struct Scsi_Host
*shost
)
687 struct zfcp_adapter
*adapter
=
688 (struct zfcp_adapter
*)shost
->hostdata
[0];
689 int status
= atomic_read(&adapter
->status
);
691 if ((status
& ZFCP_STATUS_COMMON_RUNNING
) &&
692 !(status
& ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
))
693 fc_host_port_state(shost
) = FC_PORTSTATE_ONLINE
;
694 else if (status
& ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
)
695 fc_host_port_state(shost
) = FC_PORTSTATE_LINKDOWN
;
696 else if (status
& ZFCP_STATUS_COMMON_ERP_FAILED
)
697 fc_host_port_state(shost
) = FC_PORTSTATE_ERROR
;
699 fc_host_port_state(shost
) = FC_PORTSTATE_UNKNOWN
;
702 static void zfcp_set_rport_dev_loss_tmo(struct fc_rport
*rport
, u32 timeout
)
704 rport
->dev_loss_tmo
= timeout
;
707 struct fc_function_template zfcp_transport_functions
= {
708 .show_starget_port_id
= 1,
709 .show_starget_port_name
= 1,
710 .show_starget_node_name
= 1,
711 .show_rport_supported_classes
= 1,
712 .show_rport_maxframe_size
= 1,
713 .show_rport_dev_loss_tmo
= 1,
714 .show_host_node_name
= 1,
715 .show_host_port_name
= 1,
716 .show_host_permanent_port_name
= 1,
717 .show_host_supported_classes
= 1,
718 .show_host_supported_speeds
= 1,
719 .show_host_maxframe_size
= 1,
720 .show_host_serial_number
= 1,
721 .get_fc_host_stats
= zfcp_get_fc_host_stats
,
722 .reset_fc_host_stats
= zfcp_reset_fc_host_stats
,
723 .set_rport_dev_loss_tmo
= zfcp_set_rport_dev_loss_tmo
,
724 .get_host_port_state
= zfcp_get_host_port_state
,
725 .show_host_port_state
= 1,
726 /* no functions registered for following dynamic attributes but
727 directly set by LLDD */
728 .show_host_port_type
= 1,
729 .show_host_speed
= 1,
730 .show_host_port_id
= 1,
731 .disable_target_scan
= 1,
734 #define ZFCP_DEFINE_LATENCY_ATTR(_name) \
736 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev, \
737 struct device_attribute *attr, \
739 struct scsi_device *sdev = to_scsi_device(dev); \
740 struct zfcp_unit *unit = sdev->hostdata; \
741 struct zfcp_latencies *lat = &unit->latencies; \
742 struct zfcp_adapter *adapter = unit->port->adapter; \
743 unsigned long flags; \
744 unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc; \
746 spin_lock_irqsave(&lat->lock, flags); \
747 fsum = lat->_name.fabric.sum * adapter->timer_ticks; \
748 fmin = lat->_name.fabric.min * adapter->timer_ticks; \
749 fmax = lat->_name.fabric.max * adapter->timer_ticks; \
750 csum = lat->_name.channel.sum * adapter->timer_ticks; \
751 cmin = lat->_name.channel.min * adapter->timer_ticks; \
752 cmax = lat->_name.channel.max * adapter->timer_ticks; \
753 cc = lat->_name.counter; \
754 spin_unlock_irqrestore(&lat->lock, flags); \
756 do_div(fsum, 1000); \
757 do_div(fmin, 1000); \
758 do_div(fmax, 1000); \
759 do_div(csum, 1000); \
760 do_div(cmin, 1000); \
761 do_div(cmax, 1000); \
763 return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n", \
764 fmin, fmax, fsum, cmin, cmax, csum, cc); \
767 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev, \
768 struct device_attribute *attr, \
769 const char *buf, size_t count) \
771 struct scsi_device *sdev = to_scsi_device(dev); \
772 struct zfcp_unit *unit = sdev->hostdata; \
773 struct zfcp_latencies *lat = &unit->latencies; \
774 unsigned long flags; \
776 spin_lock_irqsave(&lat->lock, flags); \
777 lat->_name.fabric.sum = 0; \
778 lat->_name.fabric.min = 0xFFFFFFFF; \
779 lat->_name.fabric.max = 0; \
780 lat->_name.channel.sum = 0; \
781 lat->_name.channel.min = 0xFFFFFFFF; \
782 lat->_name.channel.max = 0; \
783 lat->_name.counter = 0; \
784 spin_unlock_irqrestore(&lat->lock, flags); \
786 return (ssize_t) count; \
788 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO, \
789 zfcp_sysfs_unit_##_name##_latency_show, \
790 zfcp_sysfs_unit_##_name##_latency_store);
792 ZFCP_DEFINE_LATENCY_ATTR(read
);
793 ZFCP_DEFINE_LATENCY_ATTR(write
);
794 ZFCP_DEFINE_LATENCY_ATTR(cmd
);
797 * ZFCP_DEFINE_SCSI_ATTR
798 * @_name: name of show attribute
799 * @_format: format string
800 * @_value: value to print
802 * Generates attribute for a unit.
804 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value) \
805 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, struct device_attribute *attr, \
808 struct scsi_device *sdev; \
809 struct zfcp_unit *unit; \
811 sdev = to_scsi_device(dev); \
812 unit = sdev->hostdata; \
813 return sprintf(buf, _format, _value); \
816 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
818 ZFCP_DEFINE_SCSI_ATTR(hba_id
, "%s\n", zfcp_get_busid_by_unit(unit
));
819 ZFCP_DEFINE_SCSI_ATTR(wwpn
, "0x%016llx\n", unit
->port
->wwpn
);
820 ZFCP_DEFINE_SCSI_ATTR(fcp_lun
, "0x%016llx\n", unit
->fcp_lun
);
822 static struct device_attribute
*zfcp_sysfs_sdev_attrs
[] = {
826 &dev_attr_read_latency
,
827 &dev_attr_write_latency
,
828 &dev_attr_cmd_latency
,
832 static ssize_t
zfcp_sysfs_adapter_util_show(struct device
*dev
,
833 struct device_attribute
*attr
,
836 struct Scsi_Host
*scsi_host
= dev_to_shost(dev
);
837 struct fsf_qtcb_bottom_port
*qtcb_port
;
839 struct zfcp_adapter
*adapter
;
841 adapter
= (struct zfcp_adapter
*) scsi_host
->hostdata
[0];
842 if (!(adapter
->adapter_features
& FSF_FEATURE_MEASUREMENT_DATA
))
845 qtcb_port
= kzalloc(sizeof(struct fsf_qtcb_bottom_port
), GFP_KERNEL
);
849 retval
= zfcp_fsf_exchange_port_data_sync(adapter
, qtcb_port
);
851 retval
= sprintf(buf
, "%u %u %u\n", qtcb_port
->cp_util
,
852 qtcb_port
->cb_util
, qtcb_port
->a_util
);
857 static int zfcp_sysfs_adapter_ex_config(struct device
*dev
,
858 struct fsf_statistics_info
*stat_inf
)
861 struct fsf_qtcb_bottom_config
*qtcb_config
;
862 struct Scsi_Host
*scsi_host
= dev_to_shost(dev
);
863 struct zfcp_adapter
*adapter
;
865 adapter
= (struct zfcp_adapter
*) scsi_host
->hostdata
[0];
866 if (!(adapter
->adapter_features
& FSF_FEATURE_MEASUREMENT_DATA
))
869 qtcb_config
= kzalloc(sizeof(struct fsf_qtcb_bottom_config
),
874 retval
= zfcp_fsf_exchange_config_data_sync(adapter
, qtcb_config
);
876 *stat_inf
= qtcb_config
->stat_info
;
882 static ssize_t
zfcp_sysfs_adapter_request_show(struct device
*dev
,
883 struct device_attribute
*attr
,
886 struct fsf_statistics_info stat_info
;
889 retval
= zfcp_sysfs_adapter_ex_config(dev
, &stat_info
);
893 return sprintf(buf
, "%llu %llu %llu\n",
894 (unsigned long long) stat_info
.input_req
,
895 (unsigned long long) stat_info
.output_req
,
896 (unsigned long long) stat_info
.control_req
);
899 static ssize_t
zfcp_sysfs_adapter_mb_show(struct device
*dev
,
900 struct device_attribute
*attr
,
903 struct fsf_statistics_info stat_info
;
906 retval
= zfcp_sysfs_adapter_ex_config(dev
, &stat_info
);
910 return sprintf(buf
, "%llu %llu\n",
911 (unsigned long long) stat_info
.input_mb
,
912 (unsigned long long) stat_info
.output_mb
);
915 static ssize_t
zfcp_sysfs_adapter_sec_active_show(struct device
*dev
,
916 struct device_attribute
*attr
,
919 struct fsf_statistics_info stat_info
;
922 retval
= zfcp_sysfs_adapter_ex_config(dev
, &stat_info
);
926 return sprintf(buf
, "%llu\n",
927 (unsigned long long) stat_info
.seconds_act
);
930 static DEVICE_ATTR(utilization
, S_IRUGO
, zfcp_sysfs_adapter_util_show
, NULL
);
931 static DEVICE_ATTR(requests
, S_IRUGO
, zfcp_sysfs_adapter_request_show
, NULL
);
932 static DEVICE_ATTR(megabytes
, S_IRUGO
, zfcp_sysfs_adapter_mb_show
, NULL
);
933 static DEVICE_ATTR(seconds_active
, S_IRUGO
,
934 zfcp_sysfs_adapter_sec_active_show
, NULL
);
936 static struct device_attribute
*zfcp_a_stats_attrs
[] = {
937 &dev_attr_utilization
,
940 &dev_attr_seconds_active
,