2 * This file is provided under a dual BSD/GPLv2 license. When using or
3 * redistributing this file, you may do so under either license.
7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
26 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
27 * All rights reserved.
29 * Redistribution and use in source and binary forms, with or without
30 * modification, are permitted provided that the following conditions
33 * * Redistributions of source code must retain the above copyright
34 * notice, this list of conditions and the following disclaimer.
35 * * Redistributions in binary form must reproduce the above copyright
36 * notice, this list of conditions and the following disclaimer in
37 * the documentation and/or other materials provided with the
39 * * Neither the name of Intel Corporation nor the names of its
40 * contributors may be used to endorse or promote products derived
41 * from this software without specific prior written permission.
43 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
44 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
45 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
46 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
47 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
57 * This file contains the isci port implementation.
63 #include <linux/workqueue.h>
65 #include "scic_io_request.h"
67 #include "scic_sds_phy.h"
68 #include "scic_port.h"
71 #include "core/scic_sds_controller.h"
73 static void isci_port_change_state(
74 struct isci_port
*isci_port
,
75 enum isci_status status
);
80 * isci_port_init() - This function initializes the given isci_port object.
81 * @isci_port: This parameter specifies the port object to be initialized.
82 * @isci_host: This parameter specifies parent controller object for the port.
83 * @index: This parameter specifies which SCU port the isci_port associates
84 * with. Generally, SCU port 0 relates to isci_port 0, etc.
88 struct isci_port
*isci_port
,
89 struct isci_host
*isci_host
,
92 struct scic_sds_port
*scic_port
;
93 struct scic_sds_controller
*controller
= isci_host
->core_controller
;
95 INIT_LIST_HEAD(&isci_port
->remote_dev_list
);
96 INIT_LIST_HEAD(&isci_port
->domain_dev_list
);
97 spin_lock_init(&isci_port
->state_lock
);
98 init_completion(&isci_port
->start_complete
);
99 isci_port
->isci_host
= isci_host
;
100 isci_port_change_state(isci_port
, isci_freed
);
102 (void)scic_controller_get_port_handle(controller
, index
, &scic_port
);
103 isci_port
->sci_port_handle
= scic_port
;
104 scic_port
->iport
= isci_port
;
109 * isci_port_get_state() - This function gets the status of the port object.
110 * @isci_port: This parameter points to the isci_port object
112 * status of the object as a isci_status enum.
114 enum isci_status
isci_port_get_state(
115 struct isci_port
*isci_port
)
117 return isci_port
->status
;
120 static void isci_port_change_state(
121 struct isci_port
*isci_port
,
122 enum isci_status status
)
126 dev_dbg(&isci_port
->isci_host
->pdev
->dev
,
127 "%s: isci_port = %p, state = 0x%x\n",
128 __func__
, isci_port
, status
);
130 spin_lock_irqsave(&isci_port
->state_lock
, flags
);
131 isci_port
->status
= status
;
132 spin_unlock_irqrestore(&isci_port
->state_lock
, flags
);
135 void isci_port_bc_change_received(
136 struct isci_host
*isci_host
,
137 struct scic_sds_port
*port
,
138 struct scic_sds_phy
*phy
)
140 struct isci_phy
*isci_phy
= phy
->iphy
;
142 dev_dbg(&isci_host
->pdev
->dev
,
143 "%s: isci_phy = %p, sas_phy = %p\n",
148 isci_host
->sas_ha
.notify_port_event(
153 scic_port_enable_broadcast_change_notification(port
);
157 * isci_port_link_up() - This function is called by the sci core when a link
158 * becomes active. the identify address frame is retrieved from the core and
159 * a notify port event is sent to libsas.
160 * @isci_host: This parameter specifies the isci host object.
161 * @port: This parameter specifies the sci port with the active link.
162 * @phy: This parameter specifies the sci phy with the active link.
165 void isci_port_link_up(
166 struct isci_host
*isci_host
,
167 struct scic_sds_port
*port
,
168 struct scic_sds_phy
*phy
)
171 struct scic_port_properties properties
;
172 struct isci_phy
*isci_phy
= phy
->iphy
;
173 struct isci_port
*isci_port
= port
->iport
;
174 unsigned long success
= true;
176 BUG_ON(isci_phy
->isci_port
!= NULL
);
178 isci_phy
->isci_port
= isci_port
;
180 dev_dbg(&isci_host
->pdev
->dev
,
181 "%s: isci_port = %p\n",
182 __func__
, isci_port
);
184 spin_lock_irqsave(&isci_phy
->sas_phy
.frame_rcvd_lock
, flags
);
186 isci_port_change_state(isci_phy
->isci_port
, isci_starting
);
188 scic_port_get_properties(port
, &properties
);
190 if (phy
->protocol
== SCIC_SDS_PHY_PROTOCOL_SATA
) {
191 u64 attached_sas_address
;
193 isci_phy
->sas_phy
.oob_mode
= SATA_OOB_MODE
;
194 isci_phy
->sas_phy
.frame_rcvd_size
= sizeof(struct dev_to_host_fis
);
197 * For direct-attached SATA devices, the SCI core will
198 * automagically assign a SAS address to the end device
199 * for the purpose of creating a port. This SAS address
200 * will not be the same as assigned to the PHY and needs
201 * to be obtained from struct scic_port_properties properties.
203 attached_sas_address
= properties
.remote
.sas_address
.high
;
204 attached_sas_address
<<= 32;
205 attached_sas_address
|= properties
.remote
.sas_address
.low
;
206 swab64s(&attached_sas_address
);
208 memcpy(&isci_phy
->sas_phy
.attached_sas_addr
,
209 &attached_sas_address
, sizeof(attached_sas_address
));
210 } else if (phy
->protocol
== SCIC_SDS_PHY_PROTOCOL_SAS
) {
211 isci_phy
->sas_phy
.oob_mode
= SAS_OOB_MODE
;
212 isci_phy
->sas_phy
.frame_rcvd_size
= sizeof(struct sas_identify_frame
);
214 /* Copy the attached SAS address from the IAF */
215 memcpy(isci_phy
->sas_phy
.attached_sas_addr
,
216 isci_phy
->frame_rcvd
.iaf
.sas_addr
, SAS_ADDR_SIZE
);
218 dev_err(&isci_host
->pdev
->dev
, "%s: unkown target\n", __func__
);
222 isci_phy
->sas_phy
.phy
->negotiated_linkrate
= sci_phy_linkrate(phy
);
224 spin_unlock_irqrestore(&isci_phy
->sas_phy
.frame_rcvd_lock
, flags
);
226 /* Notify libsas that we have an address frame, if indeed
227 * we've found an SSP, SMP, or STP target */
229 isci_host
->sas_ha
.notify_port_event(&isci_phy
->sas_phy
,
235 * isci_port_link_down() - This function is called by the sci core when a link
237 * @isci_host: This parameter specifies the isci host object.
238 * @phy: This parameter specifies the isci phy with the active link.
239 * @port: This parameter specifies the isci port with the active link.
242 void isci_port_link_down(struct isci_host
*isci_host
, struct isci_phy
*isci_phy
,
243 struct isci_port
*isci_port
)
245 struct isci_remote_device
*isci_device
;
247 dev_dbg(&isci_host
->pdev
->dev
,
248 "%s: isci_port = %p\n", __func__
, isci_port
);
252 /* check to see if this is the last phy on this port. */
253 if (isci_phy
->sas_phy
.port
254 && isci_phy
->sas_phy
.port
->num_phys
== 1) {
256 /* change the state for all devices on this port.
257 * The next task sent to this device will be returned
258 * as SAS_TASK_UNDELIVERED, and the scsi mid layer
259 * will remove the target
261 list_for_each_entry(isci_device
,
262 &isci_port
->remote_dev_list
,
264 dev_dbg(&isci_host
->pdev
->dev
,
265 "%s: isci_device = %p\n",
266 __func__
, isci_device
);
267 isci_remote_device_change_state(isci_device
,
271 isci_port_change_state(isci_port
, isci_stopping
);
274 /* Notify libsas of the borken link, this will trigger calls to our
275 * isci_port_deformed and isci_dev_gone functions.
277 sas_phy_disconnected(&isci_phy
->sas_phy
);
278 isci_host
->sas_ha
.notify_phy_event(&isci_phy
->sas_phy
,
279 PHYE_LOSS_OF_SIGNAL
);
281 isci_phy
->isci_port
= NULL
;
283 dev_dbg(&isci_host
->pdev
->dev
,
284 "%s: isci_port = %p - Done\n", __func__
, isci_port
);
289 * isci_port_deformed() - This function is called by libsas when a port becomes
291 * @phy: This parameter specifies the libsas phy with the inactive port.
294 void isci_port_deformed(
295 struct asd_sas_phy
*phy
)
297 pr_debug("%s: sas_phy = %p\n", __func__
, phy
);
301 * isci_port_formed() - This function is called by libsas when a port becomes
303 * @phy: This parameter specifies the libsas phy with the active port.
306 void isci_port_formed(
307 struct asd_sas_phy
*phy
)
309 pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__
, phy
, phy
->port
);
313 * isci_port_ready() - This function is called by the sci core when a link
315 * @isci_host: This parameter specifies the isci host object.
316 * @port: This parameter specifies the sci port with the active link.
319 void isci_port_ready(struct isci_host
*isci_host
, struct isci_port
*isci_port
)
321 dev_dbg(&isci_host
->pdev
->dev
,
322 "%s: isci_port = %p\n", __func__
, isci_port
);
324 complete_all(&isci_port
->start_complete
);
325 isci_port_change_state(isci_port
, isci_ready
);
330 * isci_port_not_ready() - This function is called by the sci core when a link
331 * is not ready. All remote devices on this link will be removed if they are
332 * in the stopping state.
333 * @isci_host: This parameter specifies the isci host object.
334 * @port: This parameter specifies the sci port with the active link.
337 void isci_port_not_ready(struct isci_host
*isci_host
, struct isci_port
*isci_port
)
339 dev_dbg(&isci_host
->pdev
->dev
,
340 "%s: isci_port = %p\n", __func__
, isci_port
);
344 * isci_port_hard_reset_complete() - This function is called by the sci core
345 * when the hard reset complete notification has been received.
346 * @port: This parameter specifies the sci port with the active link.
347 * @completion_status: This parameter specifies the core status for the reset
351 void isci_port_hard_reset_complete(struct isci_port
*isci_port
,
352 enum sci_status completion_status
)
354 dev_dbg(&isci_port
->isci_host
->pdev
->dev
,
355 "%s: isci_port = %p, completion_status=%x\n",
356 __func__
, isci_port
, completion_status
);
358 /* Save the status of the hard reset from the port. */
359 isci_port
->hard_reset_status
= completion_status
;
361 complete_all(&isci_port
->hard_reset_complete
);
364 int isci_port_perform_hard_reset(struct isci_host
*ihost
, struct isci_port
*iport
,
365 struct isci_phy
*iphy
)
368 enum sci_status status
;
369 int ret
= TMF_RESP_FUNC_COMPLETE
;
371 dev_dbg(&ihost
->pdev
->dev
, "%s: iport = %p\n",
374 init_completion(&iport
->hard_reset_complete
);
376 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
378 #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
379 status
= scic_port_hard_reset(iport
->sci_port_handle
,
380 ISCI_PORT_RESET_TIMEOUT
);
382 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
384 if (status
== SCI_SUCCESS
) {
385 wait_for_completion(&iport
->hard_reset_complete
);
387 dev_dbg(&ihost
->pdev
->dev
,
388 "%s: iport = %p; hard reset completion\n",
391 if (iport
->hard_reset_status
!= SCI_SUCCESS
)
392 ret
= TMF_RESP_FUNC_FAILED
;
394 ret
= TMF_RESP_FUNC_FAILED
;
396 dev_err(&ihost
->pdev
->dev
,
397 "%s: iport = %p; scic_port_hard_reset call"
399 __func__
, iport
, status
);
403 /* If the hard reset for the port has failed, consider this
404 * the same as link failures on all phys in the port.
406 if (ret
!= TMF_RESP_FUNC_COMPLETE
) {
407 dev_err(&ihost
->pdev
->dev
,
408 "%s: iport = %p; hard reset failed "
409 "(0x%x) - sending link down to libsas for phy %p\n",
410 __func__
, iport
, iport
->hard_reset_status
, iphy
);
412 isci_port_link_down(ihost
, iphy
, iport
);
419 * isci_port_invalid_link_up() - This function informs the SCI Core user that
420 * a phy/link became ready, but the phy is not allowed in the port. In some
421 * situations the underlying hardware only allows for certain phy to port
422 * mappings. If these mappings are violated, then this API is invoked.
423 * @controller: This parameter represents the controller which contains the
425 * @port: This parameter specifies the SCI port object for which the callback
427 * @phy: This parameter specifies the phy that came ready, but the phy can't be
428 * a valid member of the port.
431 void isci_port_invalid_link_up(struct scic_sds_controller
*scic
,
432 struct scic_sds_port
*sci_port
,
433 struct scic_sds_phy
*phy
)
435 struct isci_host
*ihost
= scic
->ihost
;
437 dev_warn(&ihost
->pdev
->dev
, "Invalid link up!\n");
440 void isci_port_stop_complete(struct scic_sds_controller
*scic
,
441 struct scic_sds_port
*sci_port
,
442 enum sci_status completion_status
)
444 struct isci_host
*ihost
= scic
->ihost
;
446 dev_dbg(&ihost
->pdev
->dev
, "Port stop complete\n");