xref: /freebsd/sys/dev/isci/scil/scif_sas_remote_device.c (revision 47dd1d1b619cc035b82b49a91a25544309ff95ae)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
3  *
4  * This file is provided under a dual BSD/GPLv2 license.  When using or
5  * redistributing this file, you may do so under either license.
6  *
7  * GPL LICENSE SUMMARY
8  *
9  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of version 2 of the GNU General Public License as
13  * published by the Free Software Foundation.
14  *
15  * This program is distributed in the hope that it will be useful, but
16  * WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18  * General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
23  * The full GNU General Public License is included in this distribution
24  * in the file called LICENSE.GPL.
25  *
26  * BSD LICENSE
27  *
28  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
29  * All rights reserved.
30  *
31  * Redistribution and use in source and binary forms, with or without
32  * modification, are permitted provided that the following conditions
33  * are met:
34  *
35  *   * Redistributions of source code must retain the above copyright
36  *     notice, this list of conditions and the following disclaimer.
37  *   * Redistributions in binary form must reproduce the above copyright
38  *     notice, this list of conditions and the following disclaimer in
39  *     the documentation and/or other materials provided with the
40  *     distribution.
41  *
42  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
43  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
44  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
45  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
46  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
47  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
48  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
49  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
50  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
51  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
52  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
53  */
54 
55 #include <sys/cdefs.h>
56 __FBSDID("$FreeBSD$");
57 
58 /**
59  * @file
60  *
61  * @brief This file contains the implementation of the SCIF_SAS_REMOTE_DEVICE
62  *        object.
63  */
64 
65 
66 #include <dev/isci/scil/scic_remote_device.h>
67 #include <dev/isci/scil/scic_port.h>
68 #include <dev/isci/scil/scic_user_callback.h>
69 
70 #include <dev/isci/scil/scif_sas_logger.h>
71 #include <dev/isci/scil/scif_sas_remote_device.h>
72 #include <dev/isci/scil/scif_sas_stp_remote_device.h>
73 #include <dev/isci/scil/scif_sas_domain.h>
74 #include <dev/isci/scil/scif_sas_controller.h>
75 #include <dev/isci/scil/sci_controller.h>
76 #include <dev/isci/scil/sci_util.h>
77 
78 
79 //******************************************************************************
80 //* P U B L I C   M E T H O D S
81 //******************************************************************************
82 
83 U32 scif_remote_device_get_object_size(
84    void
85 )
86 {
87    return ( sizeof(SCIF_SAS_REMOTE_DEVICE_T)
88           + scic_remote_device_get_object_size() );
89 }
90 
91 // ---------------------------------------------------------------------------
92 
93 void scif_remote_device_construct(
94    SCI_DOMAIN_HANDLE_T          domain,
95    void                       * remote_device_memory,
96    SCI_REMOTE_DEVICE_HANDLE_T * new_scif_remote_device_handle
97 )
98 {
99    SCIF_SAS_DOMAIN_T        * fw_domain = (SCIF_SAS_DOMAIN_T *) domain;
100    SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T *)
101                                           remote_device_memory;
102 
103    SCIF_LOG_TRACE((
104       sci_base_object_get_logger(fw_domain),
105       SCIF_LOG_OBJECT_REMOTE_DEVICE,
106       "scif_remote_device_construct(0x%x, 0x%x, 0x%x) enter\n",
107       domain, remote_device_memory, new_scif_remote_device_handle
108    ));
109 
110    memset(remote_device_memory, 0, sizeof(SCIF_SAS_REMOTE_DEVICE_T));
111 
112    // The user's handle to the remote device evaluates to the memory
113    // address where the remote device object is stored.
114    *new_scif_remote_device_handle = remote_device_memory;
115 
116    fw_device->domain                = fw_domain;
117    fw_device->destruct_when_stopped = FALSE;
118    //fw_device->parent.is_failed      = FALSE;
119    fw_device->operation_status      = SCI_SUCCESS;
120    fw_device->request_count         = 0;
121    fw_device->task_request_count    = 0;
122    fw_device->is_currently_discovered = TRUE;
123    fw_device->containing_device       = NULL;
124    fw_device->device_port_width       = 1;
125    fw_device->expander_phy_identifier = 0;
126    fw_device->destination_state       =
127       SCIF_SAS_REMOTE_DEVICE_DESTINATION_STATE_UNSPECIFIED;
128    fw_device->ea_target_reset_request_scheduled = NULL;
129 
130    // Construct the base object first in order to ensure logging can
131    // function.
132    sci_base_remote_device_construct(
133       &fw_device->parent,
134       sci_base_object_get_logger(fw_domain),
135       scif_sas_remote_device_state_table
136    );
137 
138    sci_base_state_machine_construct(
139       &fw_device->starting_substate_machine,
140       &fw_device->parent.parent,
141       scif_sas_remote_device_starting_substate_table,
142       SCIF_SAS_REMOTE_DEVICE_STARTING_SUBSTATE_AWAIT_COMPLETE
143    );
144 
145    sci_base_state_machine_construct(
146       &fw_device->ready_substate_machine,
147       &fw_device->parent.parent,
148       scif_sas_remote_device_ready_substate_table,
149       SCIF_SAS_REMOTE_DEVICE_READY_SUBSTATE_OPERATIONAL
150    );
151 
152    scif_sas_remote_device_initialize_state_logging(fw_device);
153 
154    scic_remote_device_construct(
155       fw_domain->core_object,
156       ((U8*) remote_device_memory) + sizeof(SCIF_SAS_REMOTE_DEVICE_T),
157       &fw_device->core_object
158    );
159 
160    // Set the association in the core object, so that we are able to
161    // determine our framework remote device object from the core remote
162    // device.
163    sci_object_set_association(fw_device->core_object, fw_device);
164 }
165 
166 // ---------------------------------------------------------------------------
167 
168 SCI_STATUS scif_remote_device_da_construct(
169    SCI_REMOTE_DEVICE_HANDLE_T                   remote_device,
170    SCI_SAS_ADDRESS_T                          * sas_address,
171    SCI_SAS_IDENTIFY_ADDRESS_FRAME_PROTOCOLS_T * protocols
172 )
173 {
174    SCI_STATUS                 status    = SCI_SUCCESS;
175    SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T *)
176                                           remote_device;
177 
178    SCIF_LOG_TRACE((
179       sci_base_object_get_logger(fw_device),
180       SCIF_LOG_OBJECT_REMOTE_DEVICE,
181       "scif_remote_device_da_construct(0x%x, 0x%x, 0x%x) enter\n",
182       remote_device, sas_address, protocols
183    ));
184 
185    // Make sure the device hasn't already been constructed and added
186    // to the domain.
187    if (scif_domain_get_device_by_sas_address(fw_device->domain, sas_address)
188        == SCI_INVALID_HANDLE)
189    {
190       SCIC_PORT_PROPERTIES_T  properties;
191 
192       scic_port_get_properties(fw_device->domain->core_object, &properties);
193 
194       // Check to see if this is the direct attached device.
195       if (  (sas_address->low == properties.remote.sas_address.low)
196          && (sas_address->high == properties.remote.sas_address.high) )
197       {
198          //Get accurate port width from port's phy mask for a DA device.
199          SCI_GET_BITS_SET_COUNT(properties.phy_mask, fw_device->device_port_width);
200 
201          status = scic_remote_device_da_construct(fw_device->core_object);
202       }
203       else
204          // Don't allow the user to construct a direct attached device
205          // if it's not a direct attached device.
206          status = SCI_FAILURE_UNSUPPORTED_PROTOCOL;
207    }
208    else
209       status = SCI_FAILURE_DEVICE_EXISTS;
210 
211    if (status == SCI_SUCCESS)
212    {
213       // Add the device to the domain list.
214       sci_abstract_list_pushback(
215          &fw_device->domain->remote_device_list, fw_device
216       );
217 
218       // If a SATA/STP device is connected, then construct it.
219       if (protocols->u.bits.stp_target)
220          scif_sas_stp_remote_device_construct(fw_device);
221       else if (protocols->u.bits.smp_target)
222          scif_sas_smp_remote_device_construct(fw_device);
223 
224       SCIF_LOG_INFO((
225          sci_base_object_get_logger(fw_device),
226          SCIF_LOG_OBJECT_REMOTE_DEVICE | SCIF_LOG_OBJECT_DOMAIN_DISCOVERY,
227          "Domain:0x%x SasAddress:0x%x,0x%x remote device constructed\n",
228          fw_device->domain, sas_address->low, sas_address->high
229       ));
230 
231       status = fw_device->state_handlers->parent.start_handler(
232                   &fw_device->parent
233                );
234    }
235    else
236    {
237       SCIF_LOG_WARNING((
238          sci_base_object_get_logger(fw_device),
239          SCIF_LOG_OBJECT_REMOTE_DEVICE | SCIF_LOG_OBJECT_DOMAIN_DISCOVERY,
240          "Domain:0x%x SasAddress:0x%x,0x%x Status:0x%x remote device construct failure\n",
241          fw_device->domain, sas_address->low, sas_address->high, status
242       ));
243    }
244 
245    return status;
246 }
247 
248 // ---------------------------------------------------------------------------
249 
250 SCI_STATUS scif_remote_device_ea_construct(
251    SCI_REMOTE_DEVICE_HANDLE_T   remote_device,
252    SCI_REMOTE_DEVICE_HANDLE_T   containing_device,
253    SMP_RESPONSE_DISCOVER_T    * smp_response
254 )
255 {
256    SCI_SAS_ADDRESS_T        * sas_address;
257    SCI_STATUS                 status        = SCI_SUCCESS;
258    SCIF_SAS_REMOTE_DEVICE_T * fw_device     = (SCIF_SAS_REMOTE_DEVICE_T *)
259                                               remote_device;
260    SCIF_SAS_REMOTE_DEVICE_T * fw_smp_device = (SCIF_SAS_REMOTE_DEVICE_T *)
261                                               containing_device;
262 
263    fw_device->containing_device = fw_smp_device;
264    fw_device->expander_phy_identifier =
265       fw_smp_device->protocol_device.smp_device.current_activity_phy_index;
266 
267    sas_address = &smp_response->attached_sas_address;
268 
269    SCIF_LOG_TRACE((
270       sci_base_object_get_logger(fw_device),
271       SCIF_LOG_OBJECT_REMOTE_DEVICE,
272       "scif_remote_device_ea_construct(0x%x, 0x%x) enter\n",
273       remote_device, smp_response
274    ));
275 
276    // Make sure the device hasn't already been constructed and added
277    // to the domain.
278    if (scif_domain_get_device_by_sas_address(fw_device->domain, sas_address)
279        == SCI_INVALID_HANDLE)
280    {
281       //for sata device, we need another routine. likely
282       //scif_remote_device_ea_sata_construct.
283       status = scic_remote_device_ea_construct(fw_device->core_object, smp_response);
284    }
285    else
286       status = SCI_FAILURE_DEVICE_EXISTS;
287 
288    if (status == SCI_SUCCESS)
289    {
290       // Add the device to the domain list.
291       sci_abstract_list_pushback(
292          &fw_device->domain->remote_device_list, fw_device
293       );
294 
295       if (smp_response->protocols.u.bits.attached_smp_target)
296          scif_sas_smp_remote_device_construct(fw_device);
297       else if (smp_response->protocols.u.bits.attached_stp_target)
298          scif_sas_stp_remote_device_construct(fw_device);
299 
300       SCIF_LOG_INFO((
301          sci_base_object_get_logger(fw_device),
302          SCIF_LOG_OBJECT_REMOTE_DEVICE | SCIF_LOG_OBJECT_DOMAIN_DISCOVERY,
303          "Domain:0x%x SasAddress:0x%x,0x%x remote device constructed\n",
304          fw_device->domain, sas_address->low, sas_address->high
305       ));
306 
307       //only start the device if the device is not a SATA disk on SPINUP_HOLD state.
308       if ( scic_remote_device_get_connection_rate(fw_device->core_object) !=
309               SCI_SATA_SPINUP_HOLD )
310       {
311           status = fw_device->state_handlers->parent.start_handler(
312                       &fw_device->parent
313                    );
314       }
315    }
316    else
317    {
318       SCIF_LOG_WARNING((
319          sci_base_object_get_logger(fw_device),
320          SCIF_LOG_OBJECT_REMOTE_DEVICE | SCIF_LOG_OBJECT_DOMAIN_DISCOVERY,
321          "Domain:0x%x SasAddress:0x%x,0x%x Status:0x%x remote device construct failure\n",
322          fw_device->domain, sas_address->low, sas_address->high, status
323       ));
324    }
325 
326    return status;
327 }
328 
329 // ---------------------------------------------------------------------------
330 
331 SCI_STATUS scif_remote_device_destruct(
332    SCI_REMOTE_DEVICE_HANDLE_T  remote_device
333 )
334 {
335    SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T*)
336                                           remote_device;
337 
338    SCIF_LOG_TRACE((
339       sci_base_object_get_logger(fw_device),
340       SCIF_LOG_OBJECT_REMOTE_DEVICE,
341       "scif_remote_device_destruct(0x%x) enter\n",
342       remote_device
343    ));
344 
345    //remove the device from domain's remote_device_list
346    fw_device->domain->state_handlers->device_destruct_handler(
347       &fw_device->domain->parent, &fw_device->parent
348    );
349 
350    // The destruct process may not complete immediately, since the core
351    // remote device likely needs to be stopped first.  However, the user
352    // is not given a callback notification for destruction.
353    return fw_device->state_handlers->parent.destruct_handler(
354              &fw_device->parent
355           );
356 }
357 
358 // ---------------------------------------------------------------------------
359 
360 SCI_REMOTE_DEVICE_HANDLE_T scif_remote_device_get_scic_handle(
361    SCI_REMOTE_DEVICE_HANDLE_T  scif_remote_device
362 )
363 {
364    SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T*)
365                                           scif_remote_device;
366 
367    if ( (fw_device == NULL) || (fw_device->core_object == SCI_INVALID_HANDLE) )
368       return SCI_INVALID_HANDLE;
369 
370    SCIF_LOG_WARNING((
371       sci_base_object_get_logger(fw_device),
372       SCIF_LOG_OBJECT_REMOTE_DEVICE,
373       "RemoteDevice:0x%x no associated core device found\n",
374       fw_device
375    ));
376 
377    return fw_device->core_object;
378 }
379 
380 // ---------------------------------------------------------------------------
381 
382 void scic_cb_remote_device_start_complete(
383    SCI_CONTROLLER_HANDLE_T    controller,
384    SCI_REMOTE_DEVICE_HANDLE_T remote_device,
385    SCI_STATUS                 completion_status
386 )
387 {
388    SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T*)
389                                       sci_object_get_association(remote_device);
390 
391    SCIF_LOG_TRACE((
392       sci_base_object_get_logger(fw_device),
393       SCIF_LOG_OBJECT_REMOTE_DEVICE | SCIF_LOG_OBJECT_REMOTE_DEVICE_CONFIG,
394       "scic_cb_remote_device_start_complete(0x%x, 0x%x, 0x%x) enter\n",
395       controller, remote_device, completion_status
396    ));
397 
398    fw_device->state_handlers->start_complete_handler(
399       fw_device, completion_status
400    );
401 }
402 
403 // ---------------------------------------------------------------------------
404 
405 void scic_cb_remote_device_stop_complete(
406    SCI_CONTROLLER_HANDLE_T    controller,
407    SCI_REMOTE_DEVICE_HANDLE_T remote_device,
408    SCI_STATUS                 completion_status
409 )
410 {
411    SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T*)
412                                       sci_object_get_association(remote_device);
413 
414    SCIF_LOG_TRACE((
415       sci_base_object_get_logger(fw_device),
416       SCIF_LOG_OBJECT_REMOTE_DEVICE | SCIF_LOG_OBJECT_REMOTE_DEVICE_CONFIG,
417       "scic_cb_remote_device_stop_complete(0x%x, 0x%x, 0x%x) enter\n",
418       controller, remote_device, completion_status
419    ));
420 
421    fw_device->state_handlers->stop_complete_handler(
422       fw_device, completion_status
423    );
424 }
425 
426 // ---------------------------------------------------------------------------
427 
428 void scic_cb_remote_device_ready(
429    SCI_CONTROLLER_HANDLE_T     controller,
430    SCI_REMOTE_DEVICE_HANDLE_T  remote_device
431 )
432 {
433    SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T*)
434                                       sci_object_get_association(remote_device);
435 
436    fw_device->state_handlers->ready_handler(fw_device);
437 }
438 
439 // ---------------------------------------------------------------------------
440 
441 void scic_cb_remote_device_not_ready(
442    SCI_CONTROLLER_HANDLE_T     controller,
443    SCI_REMOTE_DEVICE_HANDLE_T  remote_device,
444    U32                         reason_code
445 )
446 {
447    SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T*)
448                                       sci_object_get_association(remote_device);
449 
450    fw_device->state_handlers->not_ready_handler(fw_device,reason_code);
451 }
452 
453 // ---------------------------------------------------------------------------
454 
455 U16 scif_remote_device_get_max_queue_depth(
456    SCI_REMOTE_DEVICE_HANDLE_T  remote_device
457 )
458 {
459    SCIF_SAS_REMOTE_DEVICE_T * fw_device = (SCIF_SAS_REMOTE_DEVICE_T*)
460                                           remote_device;
461    SMP_DISCOVER_RESPONSE_PROTOCOLS_T  protocols;
462 
463    scic_remote_device_get_protocols(fw_device->core_object, &protocols);
464 
465    // If the target is a SATA/STP target, then determine the queue depth
466    // for either NCQ or for UDMA.
467    if (protocols.u.bits.attached_stp_target)
468    {
469       if (fw_device->protocol_device.stp_device.sati_device.capabilities
470           & SATI_DEVICE_CAP_NCQ_SUPPORTED_ENABLE)
471       {
472          return fw_device->protocol_device.stp_device.sati_device.ncq_depth;
473       }
474       else
475       {
476          // At the moment, we only allow a single UDMA request to be queued.
477          return 1;
478       }
479    }
480 
481    // For SSP devices return a no maximum queue depth supported.
482    return SCIF_REMOTE_DEVICE_NO_MAX_QUEUE_DEPTH;
483 }
484 
485 // ---------------------------------------------------------------------------
486 
487 SCI_STATUS scif_remote_device_get_containing_device(
488    SCI_REMOTE_DEVICE_HANDLE_T          remote_device,
489    SCI_REMOTE_DEVICE_HANDLE_T        * containing_device
490 )
491 {
492    SCI_STATUS                 status      = SCI_FAILURE;
493    SCIF_SAS_REMOTE_DEVICE_T * this_device = (SCIF_SAS_REMOTE_DEVICE_T *)
494                                             remote_device;
495 
496    if ( (this_device != NULL) && (containing_device != NULL) )
497    {
498       *containing_device = (SCI_REMOTE_DEVICE_HANDLE_T)(this_device->containing_device);
499       if (*containing_device != NULL)
500       {
501          status = SCI_SUCCESS;
502       }
503    }
504 
505    return status;
506 }
507 
508 // ---------------------------------------------------------------------------
509 
510 U32 scif_remote_device_get_started_io_count(
511    SCI_REMOTE_DEVICE_HANDLE_T  remote_device
512 )
513 {
514    SCIF_SAS_REMOTE_DEVICE_T * this_device = (SCIF_SAS_REMOTE_DEVICE_T *)
515                                             remote_device;
516 
517    return this_device->request_count - this_device->task_request_count;
518 }
519 //******************************************************************************
520 //* P R O T E C T E D   M E T H O D S
521 //******************************************************************************
522 
523 /*
524 void scif_sas_remote_device_failure(
525    SCIF_SAS_REMOTE_DEVICE_T * fw_device
526 )
527 {
528    fw_device->parent.is_failed = TRUE;
529    sci_base_state_machine_change_state(
530       &fw_device->parent.state_machine, SCI_BASE_REMOTE_DEVICE_STATE_STOPPING
531    );
532 }
533 */
534 
535 
536 /**
537  * @brief This method retrieves info from Report Phy Sata response and
538  *        save the additional data for a SATA remote device, if necessary.
539  *
540  * @param[in] report_phy_sata_response SMP Report Phy Sata response
541  *
542  * @return none
543  */
544 void scif_sas_remote_device_save_report_phy_sata_information(
545    SMP_RESPONSE_REPORT_PHY_SATA_T * report_phy_sata_response
546 )
547 {
548    //do nothing currently. Later, if needed, we will search the existed
549    //remote device by stp_sas_address, then save more information for
550    //that device off the report_phy_sata_response. This assumes the
551    //stp_sas_address from report_phy_sata response is the same sas address
552    //from discover response.
553 
554    return;
555 }
556 
557 /**
558  * @brief This method does target reset for DA or EA remote device.
559  *
560  * @param[in] fw_controller, the controller object the target device belongs
561  *            to.
562  * @param[in] fw_device, the target device to be hard reset.
563  * @param[in] fw_request, the scif task request object that asked for this
564  *            target reset.
565  */
566 void scif_sas_remote_device_target_reset(
567    SCIF_SAS_REMOTE_DEVICE_T * fw_device,
568    SCIF_SAS_REQUEST_T       * fw_request
569 )
570 {
571    SCIF_LOG_INFO((
572       sci_base_object_get_logger(fw_device),
573       SCIF_LOG_OBJECT_REMOTE_DEVICE,
574       "scif_sas_remote_device_target_reset! fw_device:0x%x fw_request:0x%x\n",
575       fw_device, fw_request
576    ));
577 
578    if (fw_device->containing_device == NULL)
579    {
580       SCI_PORT_HANDLE_T port;
581 
582       port = scif_domain_get_scic_port_handle(fw_device->domain);
583 
584       //Direct attached device target reset.
585       //calling core to do port reset. The fw_request will not be used here.
586       scic_port_hard_reset(
587          port,
588          scic_remote_device_get_suggested_reset_timeout(fw_device->core_object)
589       );
590    }
591    else
592    {  //Expander attached device target reset.
593 
594       if ( fw_device->containing_device->protocol_device.smp_device.current_activity
595               == SCIF_SAS_SMP_REMOTE_DEVICE_ACTIVITY_TARGET_RESET )
596       {
597          //The containing expander is in the middle of target resetting other of its
598          //remote disks. Flag this remote device to be target reset later.
599          SCIF_LOG_INFO((
600             sci_base_object_get_logger(fw_device),
601             SCIF_LOG_OBJECT_REMOTE_DEVICE,
602             "scif_sas_remote_device_target_reset DELAYED! fw_device:0x%x fw_request:0x%x\n",
603             fw_device, fw_request
604          ));
605 
606          fw_device->ea_target_reset_request_scheduled = fw_request;
607          return;
608       }
609 
610       //set current_activity and current_smp_request to expander device.
611       scif_sas_smp_remote_device_start_target_reset(
612          fw_device->containing_device, fw_device, fw_request);
613    }
614 
615    scic_remote_device_reset(fw_device->core_object);
616 }
617 
618 
619 /**
620  * @brief This method completes target reset for DA or EA remote device.
621  *
622  * @param[in] fw_device, the target device to be hard reset.
623  * @param[in] fw_request, the scif task request object that asked for this
624  *            target reset.
625  * @param[in] completion_status
626  */
627 void scif_sas_remote_device_target_reset_complete(
628    SCIF_SAS_REMOTE_DEVICE_T * fw_device,
629    SCIF_SAS_REQUEST_T       * fw_request,
630    SCI_STATUS                 completion_status
631 )
632 {
633    SCIF_LOG_INFO((
634       sci_base_object_get_logger(fw_device),
635       SCIF_LOG_OBJECT_REMOTE_DEVICE,
636       "scif_sas_remote_device_target_reset_complete! "
637       "fw_device:0x%x fw_request:0x%x completion_status 0x%x\n",
638       fw_device, fw_request, completion_status
639    ));
640 
641    scif_cb_task_request_complete(
642       fw_device->domain->controller,
643       fw_device,
644       fw_request,
645       (SCI_TASK_STATUS) completion_status
646    );
647 
648    scic_remote_device_reset_complete(fw_device->core_object);
649 
650    //For expander attached device done target reset.
651    if (fw_device->containing_device != NULL)
652    {
653       //search for all the devices in the domain to find other remote devices
654       //needs to be target reset.
655       SCIF_SAS_REMOTE_DEVICE_T * next_device;
656 
657       scif_sas_smp_remote_device_clear(fw_device->containing_device);
658 
659       if( (next_device = scif_sas_domain_find_next_ea_target_reset(fw_device->domain))
660               != NULL )
661       {
662          scif_sas_smp_remote_device_start_target_reset(
663             next_device->containing_device,
664             next_device,
665             next_device->ea_target_reset_request_scheduled
666          );
667 
668          next_device->ea_target_reset_request_scheduled = NULL;
669       }
670       else
671       {
672          //if the domain is in the DISCOVER state, we should resume the DISCOVER.
673          if (fw_device->domain->parent.state_machine.current_state_id ==
674                 SCI_BASE_DOMAIN_STATE_DISCOVERING)
675          {
676             SCIF_SAS_REMOTE_DEVICE_T * top_expander = fw_device->containing_device;
677 
678             while(top_expander->containing_device != NULL)
679                top_expander = top_expander->containing_device;
680 
681             scif_sas_domain_start_smp_discover(fw_device->domain, top_expander);
682          }
683          else
684          {
685             //Tell driver to kick off Discover process. If the domain is already
686             //in Discovery state, this discovery requst will not be carried on.
687             scif_cb_domain_change_notification(
688             fw_device->domain->controller, fw_device->domain );
689          }
690       }
691    }
692    else
693    {
694       //Tell driver to kick off Discover process. If the domain is already
695       //in Discovery state, this discovery requst will not be carried on.
696       scif_cb_domain_change_notification(
697          fw_device->domain->controller, fw_device->domain );
698    }
699 }
700 
701 #if !defined(DISABLE_WIDE_PORTED_TARGETS)
702 SCI_STATUS scif_sas_remote_device_update_port_width(
703    SCIF_SAS_REMOTE_DEVICE_T * fw_device,
704    U8                         new_port_width
705 )
706 {
707    SCIF_LOG_INFO((
708       sci_base_object_get_logger(fw_device),
709       SCIF_LOG_OBJECT_REMOTE_DEVICE,
710       "scif_sas_remote_device_update_port_width (0x%x, 0x%x) enter\n",
711       fw_device, new_port_width
712    ));
713 
714    fw_device->device_port_width = new_port_width;
715 
716    //Don't Start a new update of port width if a device is already in
717    //UPDATING PORT WIDTH state.
718    if (fw_device->parent.state_machine.current_state_id == SCI_BASE_REMOTE_DEVICE_STATE_READY)
719    {
720       if (fw_device->device_port_width != 0)
721       {
722          //Change state to UPDATING_PORT_WIDTH
723          sci_base_state_machine_change_state(
724             &fw_device->parent.state_machine,
725             SCI_BASE_REMOTE_DEVICE_STATE_UPDATING_PORT_WIDTH
726          );
727       }
728 
729       return SCI_SUCCESS;
730    }
731    else if (fw_device->parent.state_machine.current_state_id ==
732                SCI_BASE_REMOTE_DEVICE_STATE_STARTING)
733    {
734       fw_device->destination_state =
735          SCIF_SAS_REMOTE_DEVICE_DESTINATION_STATE_UPDATING_PORT_WIDTH;
736    }
737 
738    return SCI_FAILURE_INVALID_STATE;
739 }
740 #endif //#if !defined(DISABLE_WIDE_PORTED_TARGETS)
741 
742 
743 #ifdef SCI_LOGGING
744 void scif_sas_remote_device_initialize_state_logging(
745    SCIF_SAS_REMOTE_DEVICE_T * remote_device
746 )
747 {
748    sci_base_state_machine_logger_initialize(
749       &remote_device->parent.state_machine_logger,
750       &remote_device->parent.state_machine,
751       &remote_device->parent.parent,
752       scif_cb_logger_log_states,
753       "SCIF_SAS_REMOTE_DEVICE_T", "base_state_machine",
754       SCIF_LOG_OBJECT_REMOTE_DEVICE
755    );
756 
757    sci_base_state_machine_logger_initialize(
758       &remote_device->starting_substate_machine_logger,
759       &remote_device->starting_substate_machine,
760       &remote_device->parent.parent,
761       scif_cb_logger_log_states,
762       "SCIF_SAS_REMOTE_DEVICE_T", "starting substate machine",
763       SCIF_LOG_OBJECT_REMOTE_DEVICE
764    );
765 
766    sci_base_state_machine_logger_initialize(
767       &remote_device->ready_substate_machine_logger,
768       &remote_device->ready_substate_machine,
769       &remote_device->parent.parent,
770       scif_cb_logger_log_states,
771       "SCIF_SAS_REMOTE_DEVICE_T", "ready substate machine",
772       SCIF_LOG_OBJECT_REMOTE_DEVICE
773    );
774 }
775 
776 void scif_sas_remote_device_deinitialize_state_logging(
777    SCIF_SAS_REMOTE_DEVICE_T * remote_device
778 )
779 {
780    sci_base_state_machine_logger_deinitialize(
781       &remote_device->parent.state_machine_logger,
782       &remote_device->parent.state_machine
783    );
784 
785    sci_base_state_machine_logger_deinitialize(
786       &remote_device->starting_substate_machine_logger,
787       &remote_device->starting_substate_machine
788    );
789 
790    sci_base_state_machine_logger_deinitialize(
791       &remote_device->ready_substate_machine_logger,
792       &remote_device->ready_substate_machine
793    );
794 }
795 #endif // SCI_LOGGING
796 
797