3 * linux/drivers/s390/scsi/zfcp_scsi.c
5 * FCP adapter driver for IBM eServer zSeries
7 * (C) Copyright IBM Corp. 2002, 2004
9 * Author(s): Martin Peschke <mpeschke@de.ibm.com>
10 * Raimund Schroeder <raimund.schroeder@de.ibm.com>
13 * Stefan Bader <stefan.bader@de.ibm.com>
14 * Heiko Carstens <heiko.carstens@de.ibm.com>
15 * Andreas Herrmann <aherrman@de.ibm.com>
17 * This program is free software; you can redistribute it and/or modify
18 * it under the terms of the GNU General Public License as published by
19 * the Free Software Foundation; either version 2, or (at your option)
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software
29 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
32 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_SCSI
36 static void zfcp_scsi_slave_destroy(struct scsi_device
*sdp
);
37 static int zfcp_scsi_slave_alloc(struct scsi_device
*sdp
);
38 static int zfcp_scsi_slave_configure(struct scsi_device
*sdp
);
39 static int zfcp_scsi_queuecommand(struct scsi_cmnd
*,
40 void (*done
) (struct scsi_cmnd
*));
41 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd
*);
42 static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd
*);
43 static int zfcp_scsi_eh_bus_reset_handler(struct scsi_cmnd
*);
44 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd
*);
45 static int zfcp_task_management_function(struct zfcp_unit
*, u8
,
48 static struct zfcp_unit
*zfcp_unit_lookup(struct zfcp_adapter
*, int, scsi_id_t
,
51 static struct device_attribute
*zfcp_sysfs_sdev_attrs
[];
53 struct scsi_transport_template
*zfcp_transport_template
;
55 struct zfcp_data zfcp_data
= {
56 .scsi_host_template
= {
61 slave_alloc
: zfcp_scsi_slave_alloc
,
62 slave_configure
: zfcp_scsi_slave_configure
,
63 slave_destroy
: zfcp_scsi_slave_destroy
,
64 queuecommand
: zfcp_scsi_queuecommand
,
65 eh_abort_handler
: zfcp_scsi_eh_abort_handler
,
66 eh_device_reset_handler
: zfcp_scsi_eh_device_reset_handler
,
67 eh_bus_reset_handler
: zfcp_scsi_eh_bus_reset_handler
,
68 eh_host_reset_handler
: zfcp_scsi_eh_host_reset_handler
,
69 /* FIXME(openfcp): Tune */
74 * one less? can zfcp_create_sbale cope with it?
76 sg_tablesize
: ZFCP_MAX_SBALES_PER_REQ
,
80 sdev_attrs
: zfcp_sysfs_sdev_attrs
,
82 .driver_version
= ZFCP_VERSION
,
83 /* rest initialised with zeros */
86 /* Find start of Response Information in FCP response unit*/
88 zfcp_get_fcp_rsp_info_ptr(struct fcp_rsp_iu
*fcp_rsp_iu
)
90 char *fcp_rsp_info_ptr
;
93 (unsigned char *) fcp_rsp_iu
+ (sizeof (struct fcp_rsp_iu
));
95 return fcp_rsp_info_ptr
;
98 /* Find start of Sense Information in FCP response unit*/
100 zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu
*fcp_rsp_iu
)
102 char *fcp_sns_info_ptr
;
105 (unsigned char *) fcp_rsp_iu
+ (sizeof (struct fcp_rsp_iu
));
106 if (fcp_rsp_iu
->validity
.bits
.fcp_rsp_len_valid
)
107 fcp_sns_info_ptr
= (char *) fcp_sns_info_ptr
+
108 fcp_rsp_iu
->fcp_rsp_len
;
110 return fcp_sns_info_ptr
;
114 zfcp_get_fcp_dl_ptr(struct fcp_cmnd_iu
* fcp_cmd
)
116 int additional_length
= fcp_cmd
->add_fcp_cdb_length
<< 2;
117 fcp_dl_t
*fcp_dl_addr
;
119 fcp_dl_addr
= (fcp_dl_t
*)
120 ((unsigned char *) fcp_cmd
+
121 sizeof (struct fcp_cmnd_iu
) + additional_length
);
123 * fcp_dl_addr = start address of fcp_cmnd structure +
124 * size of fixed part + size of dynamically sized add_dcp_cdb field
125 * SEE FCP-2 documentation
131 zfcp_get_fcp_dl(struct fcp_cmnd_iu
* fcp_cmd
)
133 return *zfcp_get_fcp_dl_ptr(fcp_cmd
);
137 zfcp_set_fcp_dl(struct fcp_cmnd_iu
*fcp_cmd
, fcp_dl_t fcp_dl
)
139 *zfcp_get_fcp_dl_ptr(fcp_cmd
) = fcp_dl
;
143 * note: it's a bit-or operation not an assignment
144 * regarding the specified byte
147 set_byte(u32
* result
, char status
, char pos
)
149 *result
|= status
<< (pos
* 8);
153 set_host_byte(u32
* result
, char status
)
155 set_byte(result
, status
, 2);
159 set_driver_byte(u32
* result
, char status
)
161 set_byte(result
, status
, 3);
165 * function: zfcp_scsi_slave_alloc
173 zfcp_scsi_slave_alloc(struct scsi_device
*sdp
)
175 struct zfcp_adapter
*adapter
;
176 struct zfcp_unit
*unit
;
180 adapter
= (struct zfcp_adapter
*) sdp
->host
->hostdata
[0];
184 read_lock_irqsave(&zfcp_data
.config_lock
, flags
);
185 unit
= zfcp_unit_lookup(adapter
, sdp
->channel
, sdp
->id
, sdp
->lun
);
187 sdp
->hostdata
= unit
;
192 read_unlock_irqrestore(&zfcp_data
.config_lock
, flags
);
198 * function: zfcp_scsi_slave_destroy
206 zfcp_scsi_slave_destroy(struct scsi_device
*sdpnt
)
208 struct zfcp_unit
*unit
= (struct zfcp_unit
*) sdpnt
->hostdata
;
211 sdpnt
->hostdata
= NULL
;
215 ZFCP_LOG_NORMAL("bug: no unit associated with SCSI device at "
216 "address %p\n", sdpnt
);
221 * called from scsi midlayer to allow finetuning of a device.
224 zfcp_scsi_slave_configure(struct scsi_device
*sdp
)
226 if (sdp
->tagged_supported
)
227 scsi_adjust_queue_depth(sdp
, MSG_SIMPLE_TAG
, ZFCP_CMND_PER_LUN
);
229 scsi_adjust_queue_depth(sdp
, 0, 1);
234 * zfcp_scsi_command_fail - set result in scsi_cmnd and call scsi_done function
235 * @scpnt: pointer to struct scsi_cmnd where result is set
236 * @result: result to be set in scpnt (e.g. DID_ERROR)
239 zfcp_scsi_command_fail(struct scsi_cmnd
*scpnt
, int result
)
241 set_host_byte(&scpnt
->result
, result
);
242 if ((scpnt
->device
!= NULL
) && (scpnt
->device
->host
!= NULL
))
243 zfcp_scsi_dbf_event_result("fail", 4,
244 (struct zfcp_adapter
*) scpnt
->device
->host
->hostdata
[0],
246 /* return directly */
247 scpnt
->scsi_done(scpnt
);
251 * zfcp_scsi_command_async - worker for zfcp_scsi_queuecommand and
252 * zfcp_scsi_command_sync
253 * @adapter: adapter where scsi command is issued
254 * @unit: unit to which scsi command is sent
255 * @scpnt: scsi command to be sent
256 * @timer: timer to be started if request is successfully initiated
258 * Note: In scsi_done function must be set in scpnt.
261 zfcp_scsi_command_async(struct zfcp_adapter
*adapter
, struct zfcp_unit
*unit
,
262 struct scsi_cmnd
*scpnt
, struct timer_list
*timer
)
269 BUG_ON((adapter
== NULL
) || (adapter
!= unit
->port
->adapter
));
270 BUG_ON(scpnt
->scsi_done
== NULL
);
272 if (unlikely(NULL
== unit
)) {
273 zfcp_scsi_command_fail(scpnt
, DID_NO_CONNECT
);
278 atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED
, &unit
->status
) ||
279 !atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING
, &unit
->status
))) {
280 ZFCP_LOG_DEBUG("stopping SCSI I/O on unit 0x%016Lx on port "
281 "0x%016Lx on adapter %s\n",
282 unit
->fcp_lun
, unit
->port
->wwpn
,
283 zfcp_get_busid_by_adapter(adapter
));
284 zfcp_scsi_command_fail(scpnt
, DID_ERROR
);
289 !atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED
, &unit
->status
))) {
290 ZFCP_LOG_DEBUG("adapter %s not ready or unit 0x%016Lx "
291 "on port 0x%016Lx in recovery\n",
292 zfcp_get_busid_by_unit(unit
),
293 unit
->fcp_lun
, unit
->port
->wwpn
);
294 retval
= SCSI_MLQUEUE_DEVICE_BUSY
;
298 tmp
= zfcp_fsf_send_fcp_command_task(adapter
, unit
, scpnt
, timer
,
299 ZFCP_REQ_AUTO_CLEANUP
);
301 if (unlikely(tmp
< 0)) {
302 ZFCP_LOG_DEBUG("error: initiation of Send FCP Cmnd failed\n");
303 retval
= SCSI_MLQUEUE_HOST_BUSY
;
311 zfcp_scsi_command_sync_handler(struct scsi_cmnd
*scpnt
)
313 struct completion
*wait
= (struct completion
*) scpnt
->SCp
.ptr
;
319 * zfcp_scsi_command_sync - send a SCSI command and wait for completion
320 * @unit: unit where command is sent to
321 * @scpnt: scsi command to be sent
322 * @timer: timer to be started if request is successfully initiated
325 * Errors are indicated in scpnt->result
328 zfcp_scsi_command_sync(struct zfcp_unit
*unit
, struct scsi_cmnd
*scpnt
,
329 struct timer_list
*timer
)
332 DECLARE_COMPLETION(wait
);
334 scpnt
->SCp
.ptr
= (void *) &wait
; /* silent re-use */
335 scpnt
->scsi_done
= zfcp_scsi_command_sync_handler
;
336 ret
= zfcp_scsi_command_async(unit
->port
->adapter
, unit
, scpnt
, timer
);
338 wait_for_completion(&wait
);
340 scpnt
->SCp
.ptr
= NULL
;
346 * function: zfcp_scsi_queuecommand
348 * purpose: enqueues a SCSI command to the specified target device
350 * returns: 0 - success, SCSI command enqueued
354 zfcp_scsi_queuecommand(struct scsi_cmnd
*scpnt
,
355 void (*done
) (struct scsi_cmnd
*))
357 struct zfcp_unit
*unit
;
358 struct zfcp_adapter
*adapter
;
360 /* reset the status for this request */
362 scpnt
->host_scribble
= NULL
;
363 scpnt
->scsi_done
= done
;
366 * figure out adapter and target device
367 * (stored there by zfcp_scsi_slave_alloc)
369 adapter
= (struct zfcp_adapter
*) scpnt
->device
->host
->hostdata
[0];
370 unit
= (struct zfcp_unit
*) scpnt
->device
->hostdata
;
372 return zfcp_scsi_command_async(adapter
, unit
, scpnt
, NULL
);
376 * function: zfcp_unit_lookup
384 static struct zfcp_unit
*
385 zfcp_unit_lookup(struct zfcp_adapter
*adapter
, int channel
, scsi_id_t id
,
388 struct zfcp_port
*port
;
389 struct zfcp_unit
*unit
, *retval
= NULL
;
391 list_for_each_entry(port
, &adapter
->port_list_head
, list
) {
392 if (!port
->rport
|| (id
!= port
->rport
->scsi_target_id
))
394 list_for_each_entry(unit
, &port
->unit_list_head
, list
) {
395 if (lun
== unit
->scsi_lun
) {
406 * zfcp_scsi_eh_abort_handler - abort the specified SCSI command
407 * @scpnt: pointer to scsi_cmnd to be aborted
408 * Return: SUCCESS - command has been aborted and cleaned up in internal
409 * bookkeeping, SCSI stack won't be called for aborted command
412 * We do not need to care for a SCSI command which completes normally
413 * but late during this abort routine runs. We are allowed to return
414 * late commands to the SCSI stack. It tracks the state of commands and
415 * will handle late commands. (Usually, the normal completion of late
416 * commands is ignored with respect to the running abort operation.)
419 zfcp_scsi_eh_abort_handler(struct scsi_cmnd
*scpnt
)
421 struct Scsi_Host
*scsi_host
;
422 struct zfcp_adapter
*adapter
;
423 struct zfcp_unit
*unit
;
424 int retval
= SUCCESS
;
425 struct zfcp_fsf_req
*new_fsf_req
= NULL
;
426 struct zfcp_fsf_req
*old_fsf_req
;
429 scsi_host
= scpnt
->device
->host
;
430 adapter
= (struct zfcp_adapter
*) scsi_host
->hostdata
[0];
431 unit
= (struct zfcp_unit
*) scpnt
->device
->hostdata
;
433 ZFCP_LOG_INFO("aborting scsi_cmnd=%p on adapter %s\n",
434 scpnt
, zfcp_get_busid_by_adapter(adapter
));
436 /* avoid race condition between late normal completion and abort */
437 write_lock_irqsave(&adapter
->abort_lock
, flags
);
440 * Check whether command has just completed and can not be aborted.
441 * Even if the command has just been completed late, we can access
442 * scpnt since the SCSI stack does not release it at least until
443 * this routine returns. (scpnt is parameter passed to this routine
444 * and must not disappear during abort even on late completion.)
446 old_fsf_req
= (struct zfcp_fsf_req
*) scpnt
->host_scribble
;
448 write_unlock_irqrestore(&adapter
->abort_lock
, flags
);
449 zfcp_scsi_dbf_event_abort("lte1", adapter
, scpnt
, new_fsf_req
);
453 old_fsf_req
->data
= 0;
454 old_fsf_req
->status
|= ZFCP_STATUS_FSFREQ_ABORTING
;
456 /* don't access old_fsf_req after releasing the abort_lock */
457 write_unlock_irqrestore(&adapter
->abort_lock
, flags
);
458 /* call FSF routine which does the abort */
459 new_fsf_req
= zfcp_fsf_abort_fcp_command((unsigned long) old_fsf_req
,
462 ZFCP_LOG_INFO("error: initiation of Abort FCP Cmnd failed\n");
467 /* wait for completion of abort */
468 __wait_event(new_fsf_req
->completion_wq
,
469 new_fsf_req
->status
& ZFCP_STATUS_FSFREQ_COMPLETED
);
471 /* status should be valid since signals were not permitted */
472 if (new_fsf_req
->status
& ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED
) {
473 zfcp_scsi_dbf_event_abort("okay", adapter
, scpnt
, new_fsf_req
);
475 } else if (new_fsf_req
->status
& ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED
) {
476 zfcp_scsi_dbf_event_abort("lte2", adapter
, scpnt
, new_fsf_req
);
479 zfcp_scsi_dbf_event_abort("fail", adapter
, scpnt
, new_fsf_req
);
482 zfcp_fsf_req_free(new_fsf_req
);
488 * function: zfcp_scsi_eh_device_reset_handler
495 zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd
*scpnt
)
498 struct zfcp_unit
*unit
= (struct zfcp_unit
*) scpnt
->device
->hostdata
;
501 ZFCP_LOG_NORMAL("bug: Tried reset for nonexistent unit\n");
505 ZFCP_LOG_NORMAL("resetting unit 0x%016Lx\n", unit
->fcp_lun
);
508 * If we do not know whether the unit supports 'logical unit reset'
509 * then try 'logical unit reset' and proceed with 'target reset'
510 * if 'logical unit reset' fails.
511 * If the unit is known not to support 'logical unit reset' then
512 * skip 'logical unit reset' and try 'target reset' immediately.
514 if (!atomic_test_mask(ZFCP_STATUS_UNIT_NOTSUPPUNITRESET
,
516 retval
= zfcp_task_management_function(unit
,
517 FCP_LOGICAL_UNIT_RESET
,
520 ZFCP_LOG_DEBUG("unit reset failed (unit=%p)\n", unit
);
521 if (retval
== -ENOTSUPP
)
523 (ZFCP_STATUS_UNIT_NOTSUPPUNITRESET
,
525 /* fall through and try 'target reset' next */
527 ZFCP_LOG_DEBUG("unit reset succeeded (unit=%p)\n",
529 /* avoid 'target reset' */
534 retval
= zfcp_task_management_function(unit
, FCP_TARGET_RESET
, scpnt
);
536 ZFCP_LOG_DEBUG("target reset failed (unit=%p)\n", unit
);
539 ZFCP_LOG_DEBUG("target reset succeeded (unit=%p)\n", unit
);
547 zfcp_task_management_function(struct zfcp_unit
*unit
, u8 tm_flags
,
548 struct scsi_cmnd
*scpnt
)
550 struct zfcp_adapter
*adapter
= unit
->port
->adapter
;
551 struct zfcp_fsf_req
*fsf_req
;
554 /* issue task management function */
555 fsf_req
= zfcp_fsf_send_fcp_command_task_management
556 (adapter
, unit
, tm_flags
, 0);
558 ZFCP_LOG_INFO("error: creation of task management request "
559 "failed for unit 0x%016Lx on port 0x%016Lx on "
560 "adapter %s\n", unit
->fcp_lun
, unit
->port
->wwpn
,
561 zfcp_get_busid_by_adapter(adapter
));
562 zfcp_scsi_dbf_event_devreset("nres", tm_flags
, unit
, scpnt
);
567 __wait_event(fsf_req
->completion_wq
,
568 fsf_req
->status
& ZFCP_STATUS_FSFREQ_COMPLETED
);
571 * check completion status of task management function
573 if (fsf_req
->status
& ZFCP_STATUS_FSFREQ_TMFUNCFAILED
) {
574 zfcp_scsi_dbf_event_devreset("fail", tm_flags
, unit
, scpnt
);
576 } else if (fsf_req
->status
& ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP
) {
577 zfcp_scsi_dbf_event_devreset("nsup", tm_flags
, unit
, scpnt
);
580 zfcp_scsi_dbf_event_devreset("okay", tm_flags
, unit
, scpnt
);
582 zfcp_fsf_req_free(fsf_req
);
588 * zfcp_scsi_eh_bus_reset_handler - reset bus (reopen adapter)
591 zfcp_scsi_eh_bus_reset_handler(struct scsi_cmnd
*scpnt
)
593 struct zfcp_unit
*unit
= (struct zfcp_unit
*) scpnt
->device
->hostdata
;
594 struct zfcp_adapter
*adapter
= unit
->port
->adapter
;
596 ZFCP_LOG_NORMAL("bus reset because of problems with "
597 "unit 0x%016Lx\n", unit
->fcp_lun
);
598 zfcp_erp_adapter_reopen(adapter
, 0);
599 zfcp_erp_wait(adapter
);
605 * zfcp_scsi_eh_host_reset_handler - reset host (reopen adapter)
608 zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd
*scpnt
)
610 struct zfcp_unit
*unit
= (struct zfcp_unit
*) scpnt
->device
->hostdata
;
611 struct zfcp_adapter
*adapter
= unit
->port
->adapter
;
613 ZFCP_LOG_NORMAL("host reset because of problems with "
614 "unit 0x%016Lx\n", unit
->fcp_lun
);
615 zfcp_erp_adapter_reopen(adapter
, 0);
616 zfcp_erp_wait(adapter
);
629 zfcp_adapter_scsi_register(struct zfcp_adapter
*adapter
)
632 static unsigned int unique_id
= 0;
634 /* register adapter as SCSI host with mid layer of SCSI stack */
635 adapter
->scsi_host
= scsi_host_alloc(&zfcp_data
.scsi_host_template
,
636 sizeof (struct zfcp_adapter
*));
637 if (!adapter
->scsi_host
) {
638 ZFCP_LOG_NORMAL("error: registration with SCSI stack failed "
640 zfcp_get_busid_by_adapter(adapter
));
644 ZFCP_LOG_DEBUG("host registered, scsi_host=%p\n", adapter
->scsi_host
);
646 /* tell the SCSI stack some characteristics of this adapter */
647 adapter
->scsi_host
->max_id
= 1;
648 adapter
->scsi_host
->max_lun
= 1;
649 adapter
->scsi_host
->max_channel
= 0;
650 adapter
->scsi_host
->unique_id
= unique_id
++; /* FIXME */
651 adapter
->scsi_host
->max_cmd_len
= ZFCP_MAX_SCSI_CMND_LENGTH
;
652 adapter
->scsi_host
->transportt
= zfcp_transport_template
;
654 * Reverse mapping of the host number to avoid race condition
656 adapter
->scsi_host_no
= adapter
->scsi_host
->host_no
;
659 * save a pointer to our own adapter data structure within
660 * hostdata field of SCSI host data structure
662 adapter
->scsi_host
->hostdata
[0] = (unsigned long) adapter
;
664 if (scsi_add_host(adapter
->scsi_host
, &adapter
->ccw_device
->dev
)) {
665 scsi_host_put(adapter
->scsi_host
);
669 atomic_set_mask(ZFCP_STATUS_ADAPTER_REGISTERED
, &adapter
->status
);
682 zfcp_adapter_scsi_unregister(struct zfcp_adapter
*adapter
)
684 struct Scsi_Host
*shost
;
685 struct zfcp_port
*port
;
687 shost
= adapter
->scsi_host
;
690 read_lock_irq(&zfcp_data
.config_lock
);
691 list_for_each_entry(port
, &adapter
->port_list_head
, list
)
694 read_unlock_irq(&zfcp_data
.config_lock
);
695 fc_remove_host(shost
);
696 scsi_remove_host(shost
);
697 scsi_host_put(shost
);
698 adapter
->scsi_host
= NULL
;
699 adapter
->scsi_host_no
= 0;
700 atomic_clear_mask(ZFCP_STATUS_ADAPTER_REGISTERED
, &adapter
->status
);
707 zfcp_fsf_start_scsi_er_timer(struct zfcp_adapter
*adapter
)
709 adapter
->scsi_er_timer
.function
= zfcp_fsf_scsi_er_timeout_handler
;
710 adapter
->scsi_er_timer
.data
= (unsigned long) adapter
;
711 adapter
->scsi_er_timer
.expires
= jiffies
+ ZFCP_SCSI_ER_TIMEOUT
;
712 add_timer(&adapter
->scsi_er_timer
);
716 * Support functions for FC transport class
718 static struct fc_host_statistics
*
719 zfcp_init_fc_host_stats(struct zfcp_adapter
*adapter
)
721 struct fc_host_statistics
*fc_stats
;
723 if (!adapter
->fc_stats
) {
724 fc_stats
= kmalloc(sizeof(*fc_stats
), GFP_KERNEL
);
727 adapter
->fc_stats
= fc_stats
; /* freed in adater_dequeue */
729 memset(adapter
->fc_stats
, 0, sizeof(*adapter
->fc_stats
));
730 return adapter
->fc_stats
;
734 zfcp_adjust_fc_host_stats(struct fc_host_statistics
*fc_stats
,
735 struct fsf_qtcb_bottom_port
*data
,
736 struct fsf_qtcb_bottom_port
*old
)
738 fc_stats
->seconds_since_last_reset
= data
->seconds_since_last_reset
-
739 old
->seconds_since_last_reset
;
740 fc_stats
->tx_frames
= data
->tx_frames
- old
->tx_frames
;
741 fc_stats
->tx_words
= data
->tx_words
- old
->tx_words
;
742 fc_stats
->rx_frames
= data
->rx_frames
- old
->rx_frames
;
743 fc_stats
->rx_words
= data
->rx_words
- old
->rx_words
;
744 fc_stats
->lip_count
= data
->lip
- old
->lip
;
745 fc_stats
->nos_count
= data
->nos
- old
->nos
;
746 fc_stats
->error_frames
= data
->error_frames
- old
->error_frames
;
747 fc_stats
->dumped_frames
= data
->dumped_frames
- old
->dumped_frames
;
748 fc_stats
->link_failure_count
= data
->link_failure
- old
->link_failure
;
749 fc_stats
->loss_of_sync_count
= data
->loss_of_sync
- old
->loss_of_sync
;
750 fc_stats
->loss_of_signal_count
= data
->loss_of_signal
-
752 fc_stats
->prim_seq_protocol_err_count
= data
->psp_error_counts
-
753 old
->psp_error_counts
;
754 fc_stats
->invalid_tx_word_count
= data
->invalid_tx_words
-
755 old
->invalid_tx_words
;
756 fc_stats
->invalid_crc_count
= data
->invalid_crcs
- old
->invalid_crcs
;
757 fc_stats
->fcp_input_requests
= data
->input_requests
-
759 fc_stats
->fcp_output_requests
= data
->output_requests
-
760 old
->output_requests
;
761 fc_stats
->fcp_control_requests
= data
->control_requests
-
762 old
->control_requests
;
763 fc_stats
->fcp_input_megabytes
= data
->input_mb
- old
->input_mb
;
764 fc_stats
->fcp_output_megabytes
= data
->output_mb
- old
->output_mb
;
768 zfcp_set_fc_host_stats(struct fc_host_statistics
*fc_stats
,
769 struct fsf_qtcb_bottom_port
*data
)
771 fc_stats
->seconds_since_last_reset
= data
->seconds_since_last_reset
;
772 fc_stats
->tx_frames
= data
->tx_frames
;
773 fc_stats
->tx_words
= data
->tx_words
;
774 fc_stats
->rx_frames
= data
->rx_frames
;
775 fc_stats
->rx_words
= data
->rx_words
;
776 fc_stats
->lip_count
= data
->lip
;
777 fc_stats
->nos_count
= data
->nos
;
778 fc_stats
->error_frames
= data
->error_frames
;
779 fc_stats
->dumped_frames
= data
->dumped_frames
;
780 fc_stats
->link_failure_count
= data
->link_failure
;
781 fc_stats
->loss_of_sync_count
= data
->loss_of_sync
;
782 fc_stats
->loss_of_signal_count
= data
->loss_of_signal
;
783 fc_stats
->prim_seq_protocol_err_count
= data
->psp_error_counts
;
784 fc_stats
->invalid_tx_word_count
= data
->invalid_tx_words
;
785 fc_stats
->invalid_crc_count
= data
->invalid_crcs
;
786 fc_stats
->fcp_input_requests
= data
->input_requests
;
787 fc_stats
->fcp_output_requests
= data
->output_requests
;
788 fc_stats
->fcp_control_requests
= data
->control_requests
;
789 fc_stats
->fcp_input_megabytes
= data
->input_mb
;
790 fc_stats
->fcp_output_megabytes
= data
->output_mb
;
794 * zfcp_get_fc_host_stats - provide fc_host_statistics for scsi_transport_fc
796 * assumption: scsi_transport_fc synchronizes calls of
797 * get_fc_host_stats and reset_fc_host_stats
798 * (XXX to be checked otherwise introduce locking)
800 static struct fc_host_statistics
*
801 zfcp_get_fc_host_stats(struct Scsi_Host
*shost
)
803 struct zfcp_adapter
*adapter
;
804 struct fc_host_statistics
*fc_stats
;
805 struct fsf_qtcb_bottom_port
*data
;
808 adapter
= (struct zfcp_adapter
*)shost
->hostdata
[0];
809 fc_stats
= zfcp_init_fc_host_stats(adapter
);
813 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
816 memset(data
, 0, sizeof(*data
));
818 ret
= zfcp_fsf_exchange_port_data(NULL
, adapter
, data
);
821 return NULL
; /* XXX return zeroed fc_stats? */
824 if (adapter
->stats_reset
&&
825 ((jiffies
/HZ
- adapter
->stats_reset
) <
826 data
->seconds_since_last_reset
)) {
827 zfcp_adjust_fc_host_stats(fc_stats
, data
,
828 adapter
->stats_reset_data
);
830 zfcp_set_fc_host_stats(fc_stats
, data
);
837 zfcp_reset_fc_host_stats(struct Scsi_Host
*shost
)
839 struct zfcp_adapter
*adapter
;
840 struct fsf_qtcb_bottom_port
*data
, *old_data
;
843 adapter
= (struct zfcp_adapter
*)shost
->hostdata
[0];
844 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
847 memset(data
, 0, sizeof(*data
));
849 ret
= zfcp_fsf_exchange_port_data(NULL
, adapter
, data
);
851 adapter
->stats_reset
= jiffies
/HZ
;
852 old_data
= adapter
->stats_reset_data
;
853 adapter
->stats_reset_data
= data
; /* finally freed in
859 struct fc_function_template zfcp_transport_functions
= {
860 .show_starget_port_id
= 1,
861 .show_starget_port_name
= 1,
862 .show_starget_node_name
= 1,
863 .show_rport_supported_classes
= 1,
864 .show_host_node_name
= 1,
865 .show_host_port_name
= 1,
866 .show_host_permanent_port_name
= 1,
867 .show_host_supported_classes
= 1,
868 .show_host_supported_speeds
= 1,
869 .show_host_maxframe_size
= 1,
870 .show_host_serial_number
= 1,
871 .get_fc_host_stats
= zfcp_get_fc_host_stats
,
872 .reset_fc_host_stats
= zfcp_reset_fc_host_stats
,
873 /* no functions registered for following dynamic attributes but
874 directly set by LLDD */
875 .show_host_port_type
= 1,
876 .show_host_speed
= 1,
877 .show_host_port_id
= 1,
881 * ZFCP_DEFINE_SCSI_ATTR
882 * @_name: name of show attribute
883 * @_format: format string
884 * @_value: value to print
886 * Generates attribute for a unit.
888 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value) \
889 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, struct device_attribute *attr, \
892 struct scsi_device *sdev; \
893 struct zfcp_unit *unit; \
895 sdev = to_scsi_device(dev); \
896 unit = sdev->hostdata; \
897 return sprintf(buf, _format, _value); \
900 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
902 ZFCP_DEFINE_SCSI_ATTR(hba_id
, "%s\n", zfcp_get_busid_by_unit(unit
));
903 ZFCP_DEFINE_SCSI_ATTR(wwpn
, "0x%016llx\n", unit
->port
->wwpn
);
904 ZFCP_DEFINE_SCSI_ATTR(fcp_lun
, "0x%016llx\n", unit
->fcp_lun
);
906 static struct device_attribute
*zfcp_sysfs_sdev_attrs
[] = {