port.c (d35bc1bd18ab9e986cfb67c5a281a70cfd717f05) port.c (e2f8db509fdd354bb7a68c86515e9d2d8909ccc9)
1/*
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.
4 *
5 * GPL LICENSE SUMMARY
6 *
7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
8 *

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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.
54 */
55
1/*
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.
4 *
5 * GPL LICENSE SUMMARY
6 *
7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
8 *

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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.
54 */
55
56#include <linux/workqueue.h>
57#include "isci.h"
56#include "isci.h"
58#include "scic_port.h"
59#include "port.h"
60#include "request.h"
57#include "port.h"
58#include "request.h"
59#include "timers.h"
61
60
61#define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000)
62#define SCU_DUMMY_INDEX (0xFFFF)
63
62static void isci_port_change_state(struct isci_port *iport, enum isci_status status)
63{
64 unsigned long flags;
65
66 dev_dbg(&iport->isci_host->pdev->dev,
67 "%s: iport = %p, state = 0x%x\n",
68 __func__, iport, status);
69
70 /* XXX pointless lock */
71 spin_lock_irqsave(&iport->state_lock, flags);
72 iport->status = status;
73 spin_unlock_irqrestore(&iport->state_lock, flags);
74}
75
64static void isci_port_change_state(struct isci_port *iport, enum isci_status status)
65{
66 unsigned long flags;
67
68 dev_dbg(&iport->isci_host->pdev->dev,
69 "%s: iport = %p, state = 0x%x\n",
70 __func__, iport, status);
71
72 /* XXX pointless lock */
73 spin_lock_irqsave(&iport->state_lock, flags);
74 iport->status = status;
75 spin_unlock_irqrestore(&iport->state_lock, flags);
76}
77
76void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index)
78/*
79 * This function will indicate which protocols are supported by this port.
80 * @sci_port: a handle corresponding to the SAS port for which to return the
81 * supported protocols.
82 * @protocols: This parameter specifies a pointer to a data structure
83 * which the core will copy the protocol values for the port from the
84 * transmit_identification register.
85 */
86static void
87scic_sds_port_get_protocols(struct scic_sds_port *sci_port,
88 struct scic_phy_proto *protocols)
77{
89{
78 INIT_LIST_HEAD(&iport->remote_dev_list);
79 INIT_LIST_HEAD(&iport->domain_dev_list);
80 spin_lock_init(&iport->state_lock);
81 init_completion(&iport->start_complete);
82 iport->isci_host = ihost;
83 isci_port_change_state(iport, isci_freed);
90 u8 index;
91
92 protocols->all = 0;
93
94 for (index = 0; index < SCI_MAX_PHYS; index++) {
95 if (sci_port->phy_table[index] != NULL) {
96 scic_sds_phy_get_protocols(sci_port->phy_table[index],
97 protocols);
98 }
99 }
84}
85
86/**
100}
101
102/**
87 * isci_port_get_state() - This function gets the status of the port object.
88 * @isci_port: This parameter points to the isci_port object
103 * This method requests a list (mask) of the phys contained in the supplied SAS
104 * port.
105 * @sci_port: a handle corresponding to the SAS port for which to return the
106 * phy mask.
89 *
107 *
90 * status of the object as a isci_status enum.
108 * Return a bit mask indicating which phys are a part of this port. Each bit
109 * corresponds to a phy identifier (e.g. bit 0 = phy id 0).
91 */
110 */
92enum isci_status isci_port_get_state(
93 struct isci_port *isci_port)
111static u32 scic_sds_port_get_phys(struct scic_sds_port *sci_port)
94{
112{
95 return isci_port->status;
113 u32 index;
114 u32 mask;
115
116 mask = 0;
117
118 for (index = 0; index < SCI_MAX_PHYS; index++) {
119 if (sci_port->phy_table[index] != NULL) {
120 mask |= (1 << index);
121 }
122 }
123
124 return mask;
96}
97
125}
126
98void isci_port_bc_change_received(struct isci_host *ihost,
99 struct scic_sds_port *sci_port,
100 struct scic_sds_phy *sci_phy)
127/**
128 * scic_port_get_properties() - This method simply returns the properties
129 * regarding the port, such as: physical index, protocols, sas address, etc.
130 * @port: this parameter specifies the port for which to retrieve the physical
131 * index.
132 * @properties: This parameter specifies the properties structure into which to
133 * copy the requested information.
134 *
135 * Indicate if the user specified a valid port. SCI_SUCCESS This value is
136 * returned if the specified port was valid. SCI_FAILURE_INVALID_PORT This
137 * value is returned if the specified port is not valid. When this value is
138 * returned, no data is copied to the properties output parameter.
139 */
140static enum sci_status scic_port_get_properties(struct scic_sds_port *port,
141 struct scic_port_properties *prop)
101{
142{
102 struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
143 if ((port == NULL) ||
144 (port->logical_port_index == SCIC_SDS_DUMMY_PORT))
145 return SCI_FAILURE_INVALID_PORT;
103
146
104 dev_dbg(&ihost->pdev->dev, "%s: iphy = %p, sas_phy = %p\n",
105 __func__, iphy, &iphy->sas_phy);
147 prop->index = port->logical_port_index;
148 prop->phy_mask = scic_sds_port_get_phys(port);
149 scic_sds_port_get_sas_address(port, &prop->local.sas_address);
150 scic_sds_port_get_protocols(port, &prop->local.protocols);
151 scic_sds_port_get_attached_sas_address(port, &prop->remote.sas_address);
106
152
107 ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD);
108 scic_port_enable_broadcast_change_notification(sci_port);
153 return SCI_SUCCESS;
109}
110
154}
155
111void isci_port_link_up(struct isci_host *isci_host,
112 struct scic_sds_port *port,
113 struct scic_sds_phy *phy)
156static void isci_port_link_up(struct isci_host *isci_host,
157 struct scic_sds_port *port,
158 struct scic_sds_phy *phy)
114{
115 unsigned long flags;
116 struct scic_port_properties properties;
117 struct isci_phy *isci_phy = sci_phy_to_iphy(phy);
118 struct isci_port *isci_port = sci_port_to_iport(port);
119 unsigned long success = true;
120
121 BUG_ON(isci_phy->isci_port != NULL);

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179/**
180 * isci_port_link_down() - This function is called by the sci core when a link
181 * becomes inactive.
182 * @isci_host: This parameter specifies the isci host object.
183 * @phy: This parameter specifies the isci phy with the active link.
184 * @port: This parameter specifies the isci port with the active link.
185 *
186 */
159{
160 unsigned long flags;
161 struct scic_port_properties properties;
162 struct isci_phy *isci_phy = sci_phy_to_iphy(phy);
163 struct isci_port *isci_port = sci_port_to_iport(port);
164 unsigned long success = true;
165
166 BUG_ON(isci_phy->isci_port != NULL);

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224/**
225 * isci_port_link_down() - This function is called by the sci core when a link
226 * becomes inactive.
227 * @isci_host: This parameter specifies the isci host object.
228 * @phy: This parameter specifies the isci phy with the active link.
229 * @port: This parameter specifies the isci port with the active link.
230 *
231 */
187void isci_port_link_down(struct isci_host *isci_host, struct isci_phy *isci_phy,
188 struct isci_port *isci_port)
232static void isci_port_link_down(struct isci_host *isci_host,
233 struct isci_phy *isci_phy,
234 struct isci_port *isci_port)
189{
190 struct isci_remote_device *isci_device;
191
192 dev_dbg(&isci_host->pdev->dev,
193 "%s: isci_port = %p\n", __func__, isci_port);
194
195 if (isci_port) {
196

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226 isci_phy->isci_port = NULL;
227
228 dev_dbg(&isci_host->pdev->dev,
229 "%s: isci_port = %p - Done\n", __func__, isci_port);
230}
231
232
233/**
235{
236 struct isci_remote_device *isci_device;
237
238 dev_dbg(&isci_host->pdev->dev,
239 "%s: isci_port = %p\n", __func__, isci_port);
240
241 if (isci_port) {
242

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272 isci_phy->isci_port = NULL;
273
274 dev_dbg(&isci_host->pdev->dev,
275 "%s: isci_port = %p - Done\n", __func__, isci_port);
276}
277
278
279/**
234 * isci_port_deformed() - This function is called by libsas when a port becomes
235 * inactive.
236 * @phy: This parameter specifies the libsas phy with the inactive port.
237 *
238 */
239void isci_port_deformed(
240 struct asd_sas_phy *phy)
241{
242 pr_debug("%s: sas_phy = %p\n", __func__, phy);
243}
244
245/**
246 * isci_port_formed() - This function is called by libsas when a port becomes
247 * active.
248 * @phy: This parameter specifies the libsas phy with the active port.
249 *
250 */
251void isci_port_formed(
252 struct asd_sas_phy *phy)
253{
254 pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port);
255}
256
257/**
258 * isci_port_ready() - This function is called by the sci core when a link
259 * becomes ready.
260 * @isci_host: This parameter specifies the isci host object.
261 * @port: This parameter specifies the sci port with the active link.
262 *
263 */
280 * isci_port_ready() - This function is called by the sci core when a link
281 * becomes ready.
282 * @isci_host: This parameter specifies the isci host object.
283 * @port: This parameter specifies the sci port with the active link.
284 *
285 */
264void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port)
286static void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port)
265{
266 dev_dbg(&isci_host->pdev->dev,
267 "%s: isci_port = %p\n", __func__, isci_port);
268
269 complete_all(&isci_port->start_complete);
270 isci_port_change_state(isci_port, isci_ready);
271 return;
272}
273
274/**
275 * isci_port_not_ready() - This function is called by the sci core when a link
276 * is not ready. All remote devices on this link will be removed if they are
277 * in the stopping state.
278 * @isci_host: This parameter specifies the isci host object.
279 * @port: This parameter specifies the sci port with the active link.
280 *
281 */
287{
288 dev_dbg(&isci_host->pdev->dev,
289 "%s: isci_port = %p\n", __func__, isci_port);
290
291 complete_all(&isci_port->start_complete);
292 isci_port_change_state(isci_port, isci_ready);
293 return;
294}
295
296/**
297 * isci_port_not_ready() - This function is called by the sci core when a link
298 * is not ready. All remote devices on this link will be removed if they are
299 * in the stopping state.
300 * @isci_host: This parameter specifies the isci host object.
301 * @port: This parameter specifies the sci port with the active link.
302 *
303 */
282void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port)
304static void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port)
283{
284 dev_dbg(&isci_host->pdev->dev,
285 "%s: isci_port = %p\n", __func__, isci_port);
286}
287
305{
306 dev_dbg(&isci_host->pdev->dev,
307 "%s: isci_port = %p\n", __func__, isci_port);
308}
309
310static void isci_port_stop_complete(struct scic_sds_controller *scic,
311 struct scic_sds_port *sci_port,
312 enum sci_status completion_status)
313{
314 dev_dbg(&scic_to_ihost(scic)->pdev->dev, "Port stop complete\n");
315}
316
288/**
289 * isci_port_hard_reset_complete() - This function is called by the sci core
290 * when the hard reset complete notification has been received.
291 * @port: This parameter specifies the sci port with the active link.
292 * @completion_status: This parameter specifies the core status for the reset
293 * process.
294 *
295 */
317/**
318 * isci_port_hard_reset_complete() - This function is called by the sci core
319 * when the hard reset complete notification has been received.
320 * @port: This parameter specifies the sci port with the active link.
321 * @completion_status: This parameter specifies the core status for the reset
322 * process.
323 *
324 */
296void isci_port_hard_reset_complete(struct isci_port *isci_port,
297 enum sci_status completion_status)
325static void isci_port_hard_reset_complete(struct isci_port *isci_port,
326 enum sci_status completion_status)
298{
299 dev_dbg(&isci_port->isci_host->pdev->dev,
300 "%s: isci_port = %p, completion_status=%x\n",
301 __func__, isci_port, completion_status);
302
303 /* Save the status of the hard reset from the port. */
304 isci_port->hard_reset_status = completion_status;
305
306 complete_all(&isci_port->hard_reset_complete);
307}
308
327{
328 dev_dbg(&isci_port->isci_host->pdev->dev,
329 "%s: isci_port = %p, completion_status=%x\n",
330 __func__, isci_port, completion_status);
331
332 /* Save the status of the hard reset from the port. */
333 isci_port->hard_reset_status = completion_status;
334
335 complete_all(&isci_port->hard_reset_complete);
336}
337
338/* This method will return a true value if the specified phy can be assigned to
339 * this port The following is a list of phys for each port that are allowed: -
340 * Port 0 - 3 2 1 0 - Port 1 - 1 - Port 2 - 3 2 - Port 3 - 3 This method
341 * doesn't preclude all configurations. It merely ensures that a phy is part
342 * of the allowable set of phy identifiers for that port. For example, one
343 * could assign phy 3 to port 0 and no other phys. Please refer to
344 * scic_sds_port_is_phy_mask_valid() for information regarding whether the
345 * phy_mask for a port can be supported. bool true if this is a valid phy
346 * assignment for the port false if this is not a valid phy assignment for the
347 * port
348 */
349bool scic_sds_port_is_valid_phy_assignment(struct scic_sds_port *sci_port,
350 u32 phy_index)
351{
352 /* Initialize to invalid value. */
353 u32 existing_phy_index = SCI_MAX_PHYS;
354 u32 index;
355
356 if ((sci_port->physical_port_index == 1) && (phy_index != 1)) {
357 return false;
358 }
359
360 if (sci_port->physical_port_index == 3 && phy_index != 3) {
361 return false;
362 }
363
364 if (
365 (sci_port->physical_port_index == 2)
366 && ((phy_index == 0) || (phy_index == 1))
367 ) {
368 return false;
369 }
370
371 for (index = 0; index < SCI_MAX_PHYS; index++) {
372 if ((sci_port->phy_table[index] != NULL)
373 && (index != phy_index)) {
374 existing_phy_index = index;
375 }
376 }
377
378 /*
379 * Ensure that all of the phys in the port are capable of
380 * operating at the same maximum link rate. */
381 if (
382 (existing_phy_index < SCI_MAX_PHYS)
383 && (sci_port->owning_controller->user_parameters.sds1.phys[
384 phy_index].max_speed_generation !=
385 sci_port->owning_controller->user_parameters.sds1.phys[
386 existing_phy_index].max_speed_generation)
387 )
388 return false;
389
390 return true;
391}
392
393/**
394 *
395 * @sci_port: This is the port object for which to determine if the phy mask
396 * can be supported.
397 *
398 * This method will return a true value if the port's phy mask can be supported
399 * by the SCU. The following is a list of valid PHY mask configurations for
400 * each port: - Port 0 - [[3 2] 1] 0 - Port 1 - [1] - Port 2 - [[3] 2]
401 * - Port 3 - [3] This method returns a boolean indication specifying if the
402 * phy mask can be supported. true if this is a valid phy assignment for the
403 * port false if this is not a valid phy assignment for the port
404 */
405static bool scic_sds_port_is_phy_mask_valid(
406 struct scic_sds_port *sci_port,
407 u32 phy_mask)
408{
409 if (sci_port->physical_port_index == 0) {
410 if (((phy_mask & 0x0F) == 0x0F)
411 || ((phy_mask & 0x03) == 0x03)
412 || ((phy_mask & 0x01) == 0x01)
413 || (phy_mask == 0))
414 return true;
415 } else if (sci_port->physical_port_index == 1) {
416 if (((phy_mask & 0x02) == 0x02)
417 || (phy_mask == 0))
418 return true;
419 } else if (sci_port->physical_port_index == 2) {
420 if (((phy_mask & 0x0C) == 0x0C)
421 || ((phy_mask & 0x04) == 0x04)
422 || (phy_mask == 0))
423 return true;
424 } else if (sci_port->physical_port_index == 3) {
425 if (((phy_mask & 0x08) == 0x08)
426 || (phy_mask == 0))
427 return true;
428 }
429
430 return false;
431}
432
433/**
434 *
435 * @sci_port: This parameter specifies the port from which to return a
436 * connected phy.
437 *
438 * This method retrieves a currently active (i.e. connected) phy contained in
439 * the port. Currently, the lowest order phy that is connected is returned.
440 * This method returns a pointer to a SCIS_SDS_PHY object. NULL This value is
441 * returned if there are no currently active (i.e. connected to a remote end
442 * point) phys contained in the port. All other values specify a struct scic_sds_phy
443 * object that is active in the port.
444 */
445static struct scic_sds_phy *scic_sds_port_get_a_connected_phy(
446 struct scic_sds_port *sci_port
447 ) {
448 u32 index;
449 struct scic_sds_phy *phy;
450
451 for (index = 0; index < SCI_MAX_PHYS; index++) {
452 /*
453 * Ensure that the phy is both part of the port and currently
454 * connected to the remote end-point. */
455 phy = sci_port->phy_table[index];
456 if (
457 (phy != NULL)
458 && scic_sds_port_active_phy(sci_port, phy)
459 ) {
460 return phy;
461 }
462 }
463
464 return NULL;
465}
466
467/**
468 * scic_sds_port_set_phy() -
469 * @out]: port The port object to which the phy assignement is being made.
470 * @out]: phy The phy which is being assigned to the port.
471 *
472 * This method attempts to make the assignment of the phy to the port. If
473 * successful the phy is assigned to the ports phy table. bool true if the phy
474 * assignment can be made. false if the phy assignement can not be made. This
475 * is a functional test that only fails if the phy is currently assigned to a
476 * different port.
477 */
478static enum sci_status scic_sds_port_set_phy(
479 struct scic_sds_port *port,
480 struct scic_sds_phy *phy)
481{
482 /*
483 * Check to see if we can add this phy to a port
484 * that means that the phy is not part of a port and that the port does
485 * not already have a phy assinged to the phy index. */
486 if (
487 (port->phy_table[phy->phy_index] == NULL)
488 && (scic_sds_phy_get_port(phy) == NULL)
489 && scic_sds_port_is_valid_phy_assignment(port, phy->phy_index)
490 ) {
491 /*
492 * Phy is being added in the stopped state so we are in MPC mode
493 * make logical port index = physical port index */
494 port->logical_port_index = port->physical_port_index;
495 port->phy_table[phy->phy_index] = phy;
496 scic_sds_phy_set_port(phy, port);
497
498 return SCI_SUCCESS;
499 }
500
501 return SCI_FAILURE;
502}
503
504/**
505 * scic_sds_port_clear_phy() -
506 * @out]: port The port from which the phy is being cleared.
507 * @out]: phy The phy being cleared from the port.
508 *
509 * This method will clear the phy assigned to this port. This method fails if
510 * this phy is not currently assinged to this port. bool true if the phy is
511 * removed from the port. false if this phy is not assined to this port.
512 */
513static enum sci_status scic_sds_port_clear_phy(
514 struct scic_sds_port *port,
515 struct scic_sds_phy *phy)
516{
517 /* Make sure that this phy is part of this port */
518 if (port->phy_table[phy->phy_index] == phy &&
519 scic_sds_phy_get_port(phy) == port) {
520 struct scic_sds_controller *scic = port->owning_controller;
521 struct isci_host *ihost = scic_to_ihost(scic);
522
523 /* Yep it is assigned to this port so remove it */
524 scic_sds_phy_set_port(phy, &ihost->ports[SCI_MAX_PORTS].sci);
525 port->phy_table[phy->phy_index] = NULL;
526 return SCI_SUCCESS;
527 }
528
529 return SCI_FAILURE;
530}
531
532/**
533 * scic_sds_port_add_phy() -
534 * @sci_port: This parameter specifies the port in which the phy will be added.
535 * @sci_phy: This parameter is the phy which is to be added to the port.
536 *
537 * This method will add a PHY to the selected port. This method returns an
538 * enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other status
539 * is failre to add the phy to the port.
540 */
541enum sci_status scic_sds_port_add_phy(
542 struct scic_sds_port *sci_port,
543 struct scic_sds_phy *sci_phy)
544{
545 return sci_port->state_handlers->add_phy_handler(
546 sci_port, sci_phy);
547}
548
549
550/**
551 * scic_sds_port_remove_phy() -
552 * @sci_port: This parameter specifies the port in which the phy will be added.
553 * @sci_phy: This parameter is the phy which is to be added to the port.
554 *
555 * This method will remove the PHY from the selected PORT. This method returns
556 * an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any other
557 * status is failre to add the phy to the port.
558 */
559enum sci_status scic_sds_port_remove_phy(
560 struct scic_sds_port *sci_port,
561 struct scic_sds_phy *sci_phy)
562{
563 return sci_port->state_handlers->remove_phy_handler(
564 sci_port, sci_phy);
565}
566
567/**
568 * This method requests the SAS address for the supplied SAS port from the SCI
569 * implementation.
570 * @sci_port: a handle corresponding to the SAS port for which to return the
571 * SAS address.
572 * @sas_address: This parameter specifies a pointer to a SAS address structure
573 * into which the core will copy the SAS address for the port.
574 *
575 */
576void scic_sds_port_get_sas_address(
577 struct scic_sds_port *sci_port,
578 struct sci_sas_address *sas_address)
579{
580 u32 index;
581
582 sas_address->high = 0;
583 sas_address->low = 0;
584
585 for (index = 0; index < SCI_MAX_PHYS; index++) {
586 if (sci_port->phy_table[index] != NULL) {
587 scic_sds_phy_get_sas_address(sci_port->phy_table[index], sas_address);
588 }
589 }
590}
591
592/*
593 * This function requests the SAS address for the device directly attached to
594 * this SAS port.
595 * @sci_port: a handle corresponding to the SAS port for which to return the
596 * SAS address.
597 * @sas_address: This parameter specifies a pointer to a SAS address structure
598 * into which the core will copy the SAS address for the device directly
599 * attached to the port.
600 *
601 */
602void scic_sds_port_get_attached_sas_address(
603 struct scic_sds_port *sci_port,
604 struct sci_sas_address *sas_address)
605{
606 struct scic_sds_phy *sci_phy;
607
608 /*
609 * Ensure that the phy is both part of the port and currently
610 * connected to the remote end-point.
611 */
612 sci_phy = scic_sds_port_get_a_connected_phy(sci_port);
613 if (sci_phy) {
614 if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) {
615 scic_sds_phy_get_attached_sas_address(sci_phy,
616 sas_address);
617 } else {
618 scic_sds_phy_get_sas_address(sci_phy, sas_address);
619 sas_address->low += sci_phy->phy_index;
620 }
621 } else {
622 sas_address->high = 0;
623 sas_address->low = 0;
624 }
625}
626
627/**
628 * scic_sds_port_construct_dummy_rnc() - create dummy rnc for si workaround
629 *
630 * @sci_port: logical port on which we need to create the remote node context
631 * @rni: remote node index for this remote node context.
632 *
633 * This routine will construct a dummy remote node context data structure
634 * This structure will be posted to the hardware to work around a scheduler
635 * error in the hardware.
636 */
637static void scic_sds_port_construct_dummy_rnc(struct scic_sds_port *sci_port, u16 rni)
638{
639 union scu_remote_node_context *rnc;
640
641 rnc = &sci_port->owning_controller->remote_node_context_table[rni];
642
643 memset(rnc, 0, sizeof(union scu_remote_node_context));
644
645 rnc->ssp.remote_sas_address_hi = 0;
646 rnc->ssp.remote_sas_address_lo = 0;
647
648 rnc->ssp.remote_node_index = rni;
649 rnc->ssp.remote_node_port_width = 1;
650 rnc->ssp.logical_port_index = sci_port->physical_port_index;
651
652 rnc->ssp.nexus_loss_timer_enable = false;
653 rnc->ssp.check_bit = false;
654 rnc->ssp.is_valid = true;
655 rnc->ssp.is_remote_node_context = true;
656 rnc->ssp.function_number = 0;
657 rnc->ssp.arbitration_wait_time = 0;
658}
659
660/**
661 * scic_sds_port_construct_dummy_task() - create dummy task for si workaround
662 * @sci_port The logical port on which we need to create the
663 * remote node context.
664 * context.
665 * @tci The remote node index for this remote node context.
666 *
667 * This routine will construct a dummy task context data structure. This
668 * structure will be posted to the hardwre to work around a scheduler error
669 * in the hardware.
670 *
671 */
672static void scic_sds_port_construct_dummy_task(struct scic_sds_port *sci_port, u16 tci)
673{
674 struct scu_task_context *task_context;
675
676 task_context = scic_sds_controller_get_task_context_buffer(sci_port->owning_controller, tci);
677
678 memset(task_context, 0, sizeof(struct scu_task_context));
679
680 task_context->abort = 0;
681 task_context->priority = 0;
682 task_context->initiator_request = 1;
683 task_context->connection_rate = 1;
684 task_context->protocol_engine_index = 0;
685 task_context->logical_port_index = sci_port->physical_port_index;
686 task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP;
687 task_context->task_index = scic_sds_io_tag_get_index(tci);
688 task_context->valid = SCU_TASK_CONTEXT_VALID;
689 task_context->context_type = SCU_TASK_CONTEXT_TYPE;
690
691 task_context->remote_node_index = sci_port->reserved_rni;
692 task_context->command_code = 0;
693
694 task_context->link_layer_control = 0;
695 task_context->do_not_dma_ssp_good_response = 1;
696 task_context->strict_ordering = 0;
697 task_context->control_frame = 0;
698 task_context->timeout_enable = 0;
699 task_context->block_guard_enable = 0;
700
701 task_context->address_modifier = 0;
702
703 task_context->task_phase = 0x01;
704}
705
706static void scic_sds_port_destroy_dummy_resources(struct scic_sds_port *sci_port)
707{
708 struct scic_sds_controller *scic = sci_port->owning_controller;
709
710 if (sci_port->reserved_tci != SCU_DUMMY_INDEX)
711 scic_controller_free_io_tag(scic, sci_port->reserved_tci);
712
713 if (sci_port->reserved_rni != SCU_DUMMY_INDEX)
714 scic_sds_remote_node_table_release_remote_node_index(&scic->available_remote_nodes,
715 1, sci_port->reserved_rni);
716
717 sci_port->reserved_rni = SCU_DUMMY_INDEX;
718 sci_port->reserved_tci = SCU_DUMMY_INDEX;
719}
720
721/**
722 * This method performs initialization of the supplied port. Initialization
723 * includes: - state machine initialization - member variable initialization
724 * - configuring the phy_mask
725 * @sci_port:
726 * @transport_layer_registers:
727 * @port_task_scheduler_registers:
728 * @port_configuration_regsiter:
729 *
730 * enum sci_status SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION This value is returned
731 * if the phy being added to the port
732 */
733enum sci_status scic_sds_port_initialize(
734 struct scic_sds_port *sci_port,
735 void __iomem *port_task_scheduler_registers,
736 void __iomem *port_configuration_regsiter,
737 void __iomem *viit_registers)
738{
739 sci_port->port_task_scheduler_registers = port_task_scheduler_registers;
740 sci_port->port_pe_configuration_register = port_configuration_regsiter;
741 sci_port->viit_registers = viit_registers;
742
743 return SCI_SUCCESS;
744}
745
746/**
747 * scic_port_hard_reset() - perform port hard reset
748 * @port: a handle corresponding to the SAS port to be hard reset.
749 * @reset_timeout: This parameter specifies the number of milliseconds in which
750 * the port reset operation should complete.
751 *
752 * The SCI User callback in scic_user_callbacks_t will only be called once for
753 * each phy in the SAS Port at completion of the hard reset sequence. Return a
754 * status indicating whether the hard reset started successfully. SCI_SUCCESS
755 * This value is returned if the hard reset operation started successfully.
756 */
757static enum sci_status scic_port_hard_reset(struct scic_sds_port *port,
758 u32 reset_timeout)
759{
760 return port->state_handlers->reset_handler(
761 port, reset_timeout);
762}
763
764/**
765 * This method assigns the direct attached device ID for this port.
766 *
767 * @param[in] sci_port The port for which the direct attached device id is to
768 * be assigned.
769 * @param[in] device_id The direct attached device ID to assign to the port.
770 * This will be the RNi for the device
771 */
772void scic_sds_port_setup_transports(
773 struct scic_sds_port *sci_port,
774 u32 device_id)
775{
776 u8 index;
777
778 for (index = 0; index < SCI_MAX_PHYS; index++) {
779 if (sci_port->active_phy_mask & (1 << index))
780 scic_sds_phy_setup_transport(sci_port->phy_table[index], device_id);
781 }
782}
783
784/**
785 *
786 * @sci_port: This is the port on which the phy should be enabled.
787 * @sci_phy: This is the specific phy which to enable.
788 * @do_notify_user: This parameter specifies whether to inform the user (via
789 * scic_cb_port_link_up()) as to the fact that a new phy as become ready.
790 *
791 * This function will activate the phy in the port.
792 * Activation includes: - adding
793 * the phy to the port - enabling the Protocol Engine in the silicon. -
794 * notifying the user that the link is up. none
795 */
796static void scic_sds_port_activate_phy(struct scic_sds_port *sci_port,
797 struct scic_sds_phy *sci_phy,
798 bool do_notify_user)
799{
800 struct scic_sds_controller *scic = sci_port->owning_controller;
801 struct isci_host *ihost = scic_to_ihost(scic);
802
803 if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA)
804 scic_sds_phy_resume(sci_phy);
805
806 sci_port->active_phy_mask |= 1 << sci_phy->phy_index;
807
808 scic_sds_controller_clear_invalid_phy(scic, sci_phy);
809
810 if (do_notify_user == true)
811 isci_port_link_up(ihost, sci_port, sci_phy);
812}
813
814void scic_sds_port_deactivate_phy(struct scic_sds_port *sci_port,
815 struct scic_sds_phy *sci_phy,
816 bool do_notify_user)
817{
818 struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port);
819 struct isci_port *iport = sci_port_to_iport(sci_port);
820 struct isci_host *ihost = scic_to_ihost(scic);
821 struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
822
823 sci_port->active_phy_mask &= ~(1 << sci_phy->phy_index);
824
825 sci_phy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN;
826
827 /* Re-assign the phy back to the LP as if it were a narrow port */
828 writel(sci_phy->phy_index,
829 &sci_port->port_pe_configuration_register[sci_phy->phy_index]);
830
831 if (do_notify_user == true)
832 isci_port_link_down(ihost, iphy, iport);
833}
834
835/**
836 *
837 * @sci_port: This is the port on which the phy should be disabled.
838 * @sci_phy: This is the specific phy which to disabled.
839 *
840 * This function will disable the phy and report that the phy is not valid for
841 * this port object. None
842 */
843static void scic_sds_port_invalid_link_up(struct scic_sds_port *sci_port,
844 struct scic_sds_phy *sci_phy)
845{
846 struct scic_sds_controller *scic = sci_port->owning_controller;
847
848 /*
849 * Check to see if we have alreay reported this link as bad and if
850 * not go ahead and tell the SCI_USER that we have discovered an
851 * invalid link.
852 */
853 if ((scic->invalid_phy_mask & (1 << sci_phy->phy_index)) == 0) {
854 scic_sds_controller_set_invalid_phy(scic, sci_phy);
855 dev_warn(&scic_to_ihost(scic)->pdev->dev, "Invalid link up!\n");
856 }
857}
858
859/**
860 * scic_sds_port_general_link_up_handler - phy can be assigned to port?
861 * @sci_port: scic_sds_port object for which has a phy that has gone link up.
862 * @sci_phy: This is the struct scic_sds_phy object that has gone link up.
863 * @do_notify_user: This parameter specifies whether to inform the user (via
864 * scic_cb_port_link_up()) as to the fact that a new phy as become ready.
865 *
866 * Determine if this phy can be assigned to this
867 * port . If the phy is not a valid PHY for
868 * this port then the function will notify the user. A PHY can only be
869 * part of a port if it's attached SAS ADDRESS is the same as all other PHYs in
870 * the same port. none
871 */
872static void scic_sds_port_general_link_up_handler(struct scic_sds_port *sci_port,
873 struct scic_sds_phy *sci_phy,
874 bool do_notify_user)
875{
876 struct sci_sas_address port_sas_address;
877 struct sci_sas_address phy_sas_address;
878
879 scic_sds_port_get_attached_sas_address(sci_port, &port_sas_address);
880 scic_sds_phy_get_attached_sas_address(sci_phy, &phy_sas_address);
881
882 /* If the SAS address of the new phy matches the SAS address of
883 * other phys in the port OR this is the first phy in the port,
884 * then activate the phy and allow it to be used for operations
885 * in this port.
886 */
887 if ((phy_sas_address.high == port_sas_address.high &&
888 phy_sas_address.low == port_sas_address.low) ||
889 sci_port->active_phy_mask == 0) {
890 struct sci_base_state_machine *sm = &sci_port->state_machine;
891
892 scic_sds_port_activate_phy(sci_port, sci_phy, do_notify_user);
893 if (sm->current_state_id == SCI_BASE_PORT_STATE_RESETTING)
894 sci_base_state_machine_change_state(sm, SCI_BASE_PORT_STATE_READY);
895 } else
896 scic_sds_port_invalid_link_up(sci_port, sci_phy);
897}
898
899
900
901/**
902 * This method returns false if the port only has a single phy object assigned.
903 * If there are no phys or more than one phy then the method will return
904 * true.
905 * @sci_port: The port for which the wide port condition is to be checked.
906 *
907 * bool true Is returned if this is a wide ported port. false Is returned if
908 * this is a narrow port.
909 */
910static bool scic_sds_port_is_wide(struct scic_sds_port *sci_port)
911{
912 u32 index;
913 u32 phy_count = 0;
914
915 for (index = 0; index < SCI_MAX_PHYS; index++) {
916 if (sci_port->phy_table[index] != NULL) {
917 phy_count++;
918 }
919 }
920
921 return phy_count != 1;
922}
923
924/**
925 * This method is called by the PHY object when the link is detected. if the
926 * port wants the PHY to continue on to the link up state then the port
927 * layer must return true. If the port object returns false the phy object
928 * must halt its attempt to go link up.
929 * @sci_port: The port associated with the phy object.
930 * @sci_phy: The phy object that is trying to go link up.
931 *
932 * true if the phy object can continue to the link up condition. true Is
933 * returned if this phy can continue to the ready state. false Is returned if
934 * can not continue on to the ready state. This notification is in place for
935 * wide ports and direct attached phys. Since there are no wide ported SATA
936 * devices this could become an invalid port configuration.
937 */
938bool scic_sds_port_link_detected(
939 struct scic_sds_port *sci_port,
940 struct scic_sds_phy *sci_phy)
941{
942 if ((sci_port->logical_port_index != SCIC_SDS_DUMMY_PORT) &&
943 (sci_phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) &&
944 scic_sds_port_is_wide(sci_port)) {
945 scic_sds_port_invalid_link_up(sci_port, sci_phy);
946
947 return false;
948 }
949
950 return true;
951}
952
953/**
954 * This method is the entry point for the phy to inform the port that it is now
955 * in a ready state
956 * @sci_port:
957 *
958 *
959 */
960void scic_sds_port_link_up(
961 struct scic_sds_port *sci_port,
962 struct scic_sds_phy *sci_phy)
963{
964 sci_phy->is_in_link_training = false;
965
966 sci_port->state_handlers->link_up_handler(sci_port, sci_phy);
967}
968
969/**
970 * This method is the entry point for the phy to inform the port that it is no
971 * longer in a ready state
972 * @sci_port:
973 *
974 *
975 */
976void scic_sds_port_link_down(
977 struct scic_sds_port *sci_port,
978 struct scic_sds_phy *sci_phy)
979{
980 sci_port->state_handlers->link_down_handler(sci_port, sci_phy);
981}
982
983/**
984 * This method is called to start an IO request on this port.
985 * @sci_port:
986 * @sci_dev:
987 * @sci_req:
988 *
989 * enum sci_status
990 */
991enum sci_status scic_sds_port_start_io(
992 struct scic_sds_port *sci_port,
993 struct scic_sds_remote_device *sci_dev,
994 struct scic_sds_request *sci_req)
995{
996 return sci_port->state_handlers->start_io_handler(
997 sci_port, sci_dev, sci_req);
998}
999
1000/**
1001 * This method is called to complete an IO request to the port.
1002 * @sci_port:
1003 * @sci_dev:
1004 * @sci_req:
1005 *
1006 * enum sci_status
1007 */
1008enum sci_status scic_sds_port_complete_io(
1009 struct scic_sds_port *sci_port,
1010 struct scic_sds_remote_device *sci_dev,
1011 struct scic_sds_request *sci_req)
1012{
1013 return sci_port->state_handlers->complete_io_handler(
1014 sci_port, sci_dev, sci_req);
1015}
1016
1017/**
1018 * This method is provided to timeout requests for port operations. Mostly its
1019 * for the port reset operation.
1020 *
1021 *
1022 */
1023static void scic_sds_port_timeout_handler(void *port)
1024{
1025 struct scic_sds_port *sci_port = port;
1026 u32 current_state;
1027
1028 current_state = sci_base_state_machine_get_state(
1029 &sci_port->state_machine);
1030
1031 if (current_state == SCI_BASE_PORT_STATE_RESETTING) {
1032 /*
1033 * if the port is still in the resetting state then the
1034 * timeout fired before the reset completed.
1035 */
1036 sci_base_state_machine_change_state(
1037 &sci_port->state_machine,
1038 SCI_BASE_PORT_STATE_FAILED);
1039 } else if (current_state == SCI_BASE_PORT_STATE_STOPPED) {
1040 /*
1041 * if the port is stopped then the start request failed
1042 * In this case stay in the stopped state.
1043 */
1044 dev_err(sciport_to_dev(sci_port),
1045 "%s: SCIC Port 0x%p failed to stop before tiemout.\n",
1046 __func__,
1047 sci_port);
1048 } else if (current_state == SCI_BASE_PORT_STATE_STOPPING) {
1049 /*
1050 * if the port is still stopping then the stop has not
1051 * completed
1052 */
1053 isci_port_stop_complete(
1054 scic_sds_port_get_controller(sci_port),
1055 sci_port,
1056 SCI_FAILURE_TIMEOUT);
1057 } else {
1058 /*
1059 * The port is in the ready state and we have a timer
1060 * reporting a timeout this should not happen.
1061 */
1062 dev_err(sciport_to_dev(sci_port),
1063 "%s: SCIC Port 0x%p is processing a timeout operation "
1064 "in state %d.\n",
1065 __func__,
1066 sci_port,
1067 current_state);
1068 }
1069}
1070
1071/* --------------------------------------------------------------------------- */
1072
1073/**
1074 * This function updates the hardwares VIIT entry for this port.
1075 *
1076 *
1077 */
1078static void scic_sds_port_update_viit_entry(struct scic_sds_port *sci_port)
1079{
1080 struct sci_sas_address sas_address;
1081
1082 scic_sds_port_get_sas_address(sci_port, &sas_address);
1083
1084 writel(sas_address.high,
1085 &sci_port->viit_registers->initiator_sas_address_hi);
1086 writel(sas_address.low,
1087 &sci_port->viit_registers->initiator_sas_address_lo);
1088
1089 /* This value get cleared just in case its not already cleared */
1090 writel(0, &sci_port->viit_registers->reserved);
1091
1092 /* We are required to update the status register last */
1093 writel(SCU_VIIT_ENTRY_ID_VIIT |
1094 SCU_VIIT_IPPT_INITIATOR |
1095 ((1 << sci_port->physical_port_index) << SCU_VIIT_ENTRY_LPVIE_SHIFT) |
1096 SCU_VIIT_STATUS_ALL_VALID,
1097 &sci_port->viit_registers->status);
1098}
1099
1100/**
1101 * This method returns the maximum allowed speed for data transfers on this
1102 * port. This maximum allowed speed evaluates to the maximum speed of the
1103 * slowest phy in the port.
1104 * @sci_port: This parameter specifies the port for which to retrieve the
1105 * maximum allowed speed.
1106 *
1107 * This method returns the maximum negotiated speed of the slowest phy in the
1108 * port.
1109 */
1110enum sas_linkrate scic_sds_port_get_max_allowed_speed(
1111 struct scic_sds_port *sci_port)
1112{
1113 u16 index;
1114 enum sas_linkrate max_allowed_speed = SAS_LINK_RATE_6_0_GBPS;
1115 struct scic_sds_phy *phy = NULL;
1116
1117 /*
1118 * Loop through all of the phys in this port and find the phy with the
1119 * lowest maximum link rate. */
1120 for (index = 0; index < SCI_MAX_PHYS; index++) {
1121 phy = sci_port->phy_table[index];
1122 if (
1123 (phy != NULL)
1124 && (scic_sds_port_active_phy(sci_port, phy) == true)
1125 && (phy->max_negotiated_speed < max_allowed_speed)
1126 )
1127 max_allowed_speed = phy->max_negotiated_speed;
1128 }
1129
1130 return max_allowed_speed;
1131}
1132
1133static void scic_port_enable_broadcast_change_notification(struct scic_sds_port *port)
1134{
1135 struct scic_sds_phy *phy;
1136 u32 register_value;
1137 u8 index;
1138
1139 /* Loop through all of the phys to enable BCN. */
1140 for (index = 0; index < SCI_MAX_PHYS; index++) {
1141 phy = port->phy_table[index];
1142 if (phy != NULL) {
1143 register_value =
1144 readl(&phy->link_layer_registers->link_layer_control);
1145
1146 /* clear the bit by writing 1. */
1147 writel(register_value,
1148 &phy->link_layer_registers->link_layer_control);
1149 }
1150 }
1151}
1152
1153/*
1154 * ****************************************************************************
1155 * * READY SUBSTATE HANDLERS
1156 * **************************************************************************** */
1157
1158/*
1159 * This method is the general ready state stop handler for the struct scic_sds_port
1160 * object. This function will transition the ready substate machine to its
1161 * final state. enum sci_status SCI_SUCCESS
1162 */
1163static enum sci_status scic_sds_port_ready_substate_stop_handler(
1164 struct scic_sds_port *port)
1165{
1166 sci_base_state_machine_change_state(
1167 &port->state_machine,
1168 SCI_BASE_PORT_STATE_STOPPING
1169 );
1170
1171 return SCI_SUCCESS;
1172}
1173
1174/*
1175 * This method is the general ready substate complete io handler for the
1176 * struct scic_sds_port object. This function decrments the outstanding request count
1177 * for this port object. enum sci_status SCI_SUCCESS
1178 */
1179static enum sci_status scic_sds_port_ready_substate_complete_io_handler(
1180 struct scic_sds_port *port,
1181 struct scic_sds_remote_device *device,
1182 struct scic_sds_request *io_request)
1183{
1184 scic_sds_port_decrement_request_count(port);
1185
1186 return SCI_SUCCESS;
1187}
1188
1189static enum sci_status scic_sds_port_ready_substate_add_phy_handler(
1190 struct scic_sds_port *port,
1191 struct scic_sds_phy *phy)
1192{
1193 enum sci_status status;
1194
1195 status = scic_sds_port_set_phy(port, phy);
1196
1197 if (status == SCI_SUCCESS) {
1198 scic_sds_port_general_link_up_handler(port, phy, true);
1199
1200 port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
1201
1202 sci_base_state_machine_change_state(
1203 &port->ready_substate_machine,
1204 SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING
1205 );
1206 }
1207
1208 return status;
1209}
1210
1211
1212static enum sci_status scic_sds_port_ready_substate_remove_phy_handler(
1213 struct scic_sds_port *port,
1214 struct scic_sds_phy *phy)
1215{
1216 enum sci_status status;
1217
1218 status = scic_sds_port_clear_phy(port, phy);
1219
1220 if (status == SCI_SUCCESS) {
1221 scic_sds_port_deactivate_phy(port, phy, true);
1222
1223 port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
1224
1225 sci_base_state_machine_change_state(
1226 &port->ready_substate_machine,
1227 SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING
1228 );
1229 }
1230
1231 return status;
1232}
1233
1234/*
1235 * ****************************************************************************
1236 * * READY SUBSTATE WAITING HANDLERS
1237 * **************************************************************************** */
1238
1239/**
1240 *
1241 * @sci_port: This is the struct scic_sds_port object that which has a phy that has
1242 * gone link up.
1243 * @sci_phy: This is the struct scic_sds_phy object that has gone link up.
1244 *
1245 * This method is the ready waiting substate link up handler for the
1246 * struct scic_sds_port object. This methos will report the link up condition for
1247 * this port and will transition to the ready operational substate. none
1248 */
1249static void scic_sds_port_ready_waiting_substate_link_up_handler(
1250 struct scic_sds_port *sci_port,
1251 struct scic_sds_phy *sci_phy)
1252{
1253 /*
1254 * Since this is the first phy going link up for the port we can just enable
1255 * it and continue. */
1256 scic_sds_port_activate_phy(sci_port, sci_phy, true);
1257
1258 sci_base_state_machine_change_state(
1259 &sci_port->ready_substate_machine,
1260 SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL
1261 );
1262}
1263
1264/*
1265 * This method is the ready waiting substate start io handler for the
1266 * struct scic_sds_port object. The port object can not accept new requests so the
1267 * request is failed. enum sci_status SCI_FAILURE_INVALID_STATE
1268 */
1269static enum sci_status scic_sds_port_ready_waiting_substate_start_io_handler(
1270 struct scic_sds_port *port,
1271 struct scic_sds_remote_device *device,
1272 struct scic_sds_request *io_request)
1273{
1274 return SCI_FAILURE_INVALID_STATE;
1275}
1276
1277/*
1278 * ****************************************************************************
1279 * * READY SUBSTATE OPERATIONAL HANDLERS
1280 * **************************************************************************** */
1281
1282/*
1283 * This method will casue the port to reset. enum sci_status SCI_SUCCESS
1284 */
1285static enum
1286sci_status scic_sds_port_ready_operational_substate_reset_handler(
1287 struct scic_sds_port *port,
1288 u32 timeout)
1289{
1290 enum sci_status status = SCI_FAILURE_INVALID_PHY;
1291 u32 phy_index;
1292 struct scic_sds_phy *selected_phy = NULL;
1293
1294
1295 /* Select a phy on which we can send the hard reset request. */
1296 for (phy_index = 0;
1297 (phy_index < SCI_MAX_PHYS) && (selected_phy == NULL);
1298 phy_index++) {
1299 selected_phy = port->phy_table[phy_index];
1300
1301 if ((selected_phy != NULL) &&
1302 !scic_sds_port_active_phy(port, selected_phy)) {
1303 /*
1304 * We found a phy but it is not ready select
1305 * different phy
1306 */
1307 selected_phy = NULL;
1308 }
1309 }
1310
1311 /* If we have a phy then go ahead and start the reset procedure */
1312 if (selected_phy != NULL) {
1313 status = scic_sds_phy_reset(selected_phy);
1314
1315 if (status == SCI_SUCCESS) {
1316 isci_timer_start(port->timer_handle, timeout);
1317 port->not_ready_reason =
1318 SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED;
1319
1320 sci_base_state_machine_change_state(
1321 &port->state_machine,
1322 SCI_BASE_PORT_STATE_RESETTING);
1323 }
1324 }
1325
1326 return status;
1327}
1328
1329/**
1330 * scic_sds_port_ready_operational_substate_link_up_handler() -
1331 * @sci_port: This is the struct scic_sds_port object that which has a phy that has
1332 * gone link up.
1333 * @sci_phy: This is the struct scic_sds_phy object that has gone link up.
1334 *
1335 * This method is the ready operational substate link up handler for the
1336 * struct scic_sds_port object. This function notifies the SCI User that the phy has
1337 * gone link up. none
1338 */
1339static void scic_sds_port_ready_operational_substate_link_up_handler(
1340 struct scic_sds_port *sci_port,
1341 struct scic_sds_phy *sci_phy)
1342{
1343 scic_sds_port_general_link_up_handler(sci_port, sci_phy, true);
1344}
1345
1346/**
1347 * scic_sds_port_ready_operational_substate_link_down_handler() -
1348 * @sci_port: This is the struct scic_sds_port object that which has a phy that has
1349 * gone link down.
1350 * @sci_phy: This is the struct scic_sds_phy object that has gone link down.
1351 *
1352 * This method is the ready operational substate link down handler for the
1353 * struct scic_sds_port object. This function notifies the SCI User that the phy has
1354 * gone link down and if this is the last phy in the port the port will change
1355 * state to the ready waiting substate. none
1356 */
1357static void scic_sds_port_ready_operational_substate_link_down_handler(
1358 struct scic_sds_port *sci_port,
1359 struct scic_sds_phy *sci_phy)
1360{
1361 scic_sds_port_deactivate_phy(sci_port, sci_phy, true);
1362
1363 /*
1364 * If there are no active phys left in the port, then transition
1365 * the port to the WAITING state until such time as a phy goes
1366 * link up. */
1367 if (sci_port->active_phy_mask == 0)
1368 sci_base_state_machine_change_state(&sci_port->ready_substate_machine,
1369 SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
1370}
1371
1372/*
1373 * This method is the ready operational substate start io handler for the
1374 * struct scic_sds_port object. This function incremetns the outstanding request
1375 * count for this port object. enum sci_status SCI_SUCCESS
1376 */
1377static enum sci_status scic_sds_port_ready_operational_substate_start_io_handler(
1378 struct scic_sds_port *port,
1379 struct scic_sds_remote_device *device,
1380 struct scic_sds_request *io_request)
1381{
1382 port->started_request_count++;
1383 return SCI_SUCCESS;
1384}
1385
1386/*
1387 * ****************************************************************************
1388 * * READY SUBSTATE OPERATIONAL HANDLERS
1389 * **************************************************************************** */
1390
1391/*
1392 * This is the default method for a port add phy request. It will report a
1393 * warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE
1394 */
1395static enum sci_status scic_sds_port_ready_configuring_substate_add_phy_handler(
1396 struct scic_sds_port *port,
1397 struct scic_sds_phy *phy)
1398{
1399 enum sci_status status;
1400
1401 status = scic_sds_port_set_phy(port, phy);
1402
1403 if (status == SCI_SUCCESS) {
1404 scic_sds_port_general_link_up_handler(port, phy, true);
1405
1406 /*
1407 * Re-enter the configuring state since this may be the last phy in
1408 * the port. */
1409 sci_base_state_machine_change_state(
1410 &port->ready_substate_machine,
1411 SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING
1412 );
1413 }
1414
1415 return status;
1416}
1417
1418/*
1419 * This is the default method for a port remove phy request. It will report a
1420 * warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE
1421 */
1422static enum sci_status scic_sds_port_ready_configuring_substate_remove_phy_handler(
1423 struct scic_sds_port *port,
1424 struct scic_sds_phy *phy)
1425{
1426 enum sci_status status;
1427
1428 status = scic_sds_port_clear_phy(port, phy);
1429
1430 if (status == SCI_SUCCESS) {
1431 scic_sds_port_deactivate_phy(port, phy, true);
1432
1433 /*
1434 * Re-enter the configuring state since this may be the last phy in
1435 * the port. */
1436 sci_base_state_machine_change_state(
1437 &port->ready_substate_machine,
1438 SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING
1439 );
1440 }
1441
1442 return status;
1443}
1444
1445/**
1446 * scic_sds_port_ready_configuring_substate_complete_io_handler() -
1447 * @port: This is the port that is being requested to complete the io request.
1448 * @device: This is the device on which the io is completing.
1449 *
1450 * This method will decrement the outstanding request count for this port. If
1451 * the request count goes to 0 then the port can be reprogrammed with its new
1452 * phy data.
1453 */
1454static enum sci_status
1455scic_sds_port_ready_configuring_substate_complete_io_handler(
1456 struct scic_sds_port *port,
1457 struct scic_sds_remote_device *device,
1458 struct scic_sds_request *io_request)
1459{
1460 scic_sds_port_decrement_request_count(port);
1461
1462 if (port->started_request_count == 0) {
1463 sci_base_state_machine_change_state(
1464 &port->ready_substate_machine,
1465 SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL
1466 );
1467 }
1468
1469 return SCI_SUCCESS;
1470}
1471
1472static enum sci_status default_port_handler(struct scic_sds_port *sci_port,
1473 const char *func)
1474{
1475 dev_warn(sciport_to_dev(sci_port),
1476 "%s: in wrong state: %d\n", func,
1477 sci_base_state_machine_get_state(&sci_port->state_machine));
1478 return SCI_FAILURE_INVALID_STATE;
1479}
1480
1481static enum sci_status
1482scic_sds_port_default_start_handler(struct scic_sds_port *sci_port)
1483{
1484 return default_port_handler(sci_port, __func__);
1485}
1486
1487static enum sci_status
1488scic_sds_port_default_stop_handler(struct scic_sds_port *sci_port)
1489{
1490 return default_port_handler(sci_port, __func__);
1491}
1492
1493static enum sci_status
1494scic_sds_port_default_destruct_handler(struct scic_sds_port *sci_port)
1495{
1496 return default_port_handler(sci_port, __func__);
1497}
1498
1499static enum sci_status
1500scic_sds_port_default_reset_handler(struct scic_sds_port *sci_port,
1501 u32 timeout)
1502{
1503 return default_port_handler(sci_port, __func__);
1504}
1505
1506static enum sci_status
1507scic_sds_port_default_add_phy_handler(struct scic_sds_port *sci_port,
1508 struct scic_sds_phy *base_phy)
1509{
1510 return default_port_handler(sci_port, __func__);
1511}
1512
1513static enum sci_status
1514scic_sds_port_default_remove_phy_handler(struct scic_sds_port *sci_port,
1515 struct scic_sds_phy *base_phy)
1516{
1517 return default_port_handler(sci_port, __func__);
1518}
1519
1520/*
1521 * This is the default method for a port unsolicited frame request. It will
1522 * report a warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE Is it even
1523 * possible to receive an unsolicited frame directed to a port object? It
1524 * seems possible if we implementing virtual functions but until then?
1525 */
1526static enum sci_status
1527scic_sds_port_default_frame_handler(struct scic_sds_port *sci_port,
1528 u32 frame_index)
1529{
1530 struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port);
1531
1532 default_port_handler(sci_port, __func__);
1533 scic_sds_controller_release_frame(scic, frame_index);
1534
1535 return SCI_FAILURE_INVALID_STATE;
1536}
1537
1538static enum sci_status scic_sds_port_default_event_handler(struct scic_sds_port *sci_port,
1539 u32 event_code)
1540{
1541 return default_port_handler(sci_port, __func__);
1542}
1543
1544static void scic_sds_port_default_link_up_handler(struct scic_sds_port *sci_port,
1545 struct scic_sds_phy *sci_phy)
1546{
1547 default_port_handler(sci_port, __func__);
1548}
1549
1550static void scic_sds_port_default_link_down_handler(struct scic_sds_port *sci_port,
1551 struct scic_sds_phy *sci_phy)
1552{
1553 default_port_handler(sci_port, __func__);
1554}
1555
1556static enum sci_status scic_sds_port_default_start_io_handler(struct scic_sds_port *sci_port,
1557 struct scic_sds_remote_device *sci_dev,
1558 struct scic_sds_request *sci_req)
1559{
1560 return default_port_handler(sci_port, __func__);
1561}
1562
1563static enum sci_status scic_sds_port_default_complete_io_handler(struct scic_sds_port *sci_port,
1564 struct scic_sds_remote_device *sci_dev,
1565 struct scic_sds_request *sci_req)
1566{
1567 return default_port_handler(sci_port, __func__);
1568}
1569
1570
1571
1572static struct scic_sds_port_state_handler
1573scic_sds_port_ready_substate_handler_table[SCIC_SDS_PORT_READY_MAX_SUBSTATES] = {
1574 {
1575 /* SCIC_SDS_PORT_READY_SUBSTATE_WAITING */
1576 scic_sds_port_default_start_handler,
1577 scic_sds_port_ready_substate_stop_handler,
1578 scic_sds_port_default_destruct_handler,
1579 scic_sds_port_default_reset_handler,
1580 scic_sds_port_ready_substate_add_phy_handler,
1581 scic_sds_port_default_remove_phy_handler,
1582 scic_sds_port_default_frame_handler,
1583 scic_sds_port_default_event_handler,
1584 scic_sds_port_ready_waiting_substate_link_up_handler,
1585 scic_sds_port_default_link_down_handler,
1586 scic_sds_port_ready_waiting_substate_start_io_handler,
1587 scic_sds_port_ready_substate_complete_io_handler,
1588 },
1589
1590 {
1591 /* SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL */
1592 scic_sds_port_default_start_handler,
1593 scic_sds_port_ready_substate_stop_handler,
1594 scic_sds_port_default_destruct_handler,
1595 scic_sds_port_ready_operational_substate_reset_handler,
1596 scic_sds_port_ready_substate_add_phy_handler,
1597 scic_sds_port_ready_substate_remove_phy_handler,
1598 scic_sds_port_default_frame_handler,
1599 scic_sds_port_default_event_handler,
1600 scic_sds_port_ready_operational_substate_link_up_handler,
1601 scic_sds_port_ready_operational_substate_link_down_handler,
1602 scic_sds_port_ready_operational_substate_start_io_handler,
1603 scic_sds_port_ready_substate_complete_io_handler,
1604 },
1605
1606 {
1607 /* SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING */
1608 scic_sds_port_default_start_handler,
1609 scic_sds_port_ready_substate_stop_handler,
1610 scic_sds_port_default_destruct_handler,
1611 scic_sds_port_default_reset_handler,
1612 scic_sds_port_ready_configuring_substate_add_phy_handler,
1613 scic_sds_port_ready_configuring_substate_remove_phy_handler,
1614 scic_sds_port_default_frame_handler,
1615 scic_sds_port_default_event_handler,
1616 scic_sds_port_default_link_up_handler,
1617 scic_sds_port_default_link_down_handler,
1618 scic_sds_port_default_start_io_handler,
1619 scic_sds_port_ready_configuring_substate_complete_io_handler
1620 }
1621};
1622
1623/**
1624 * scic_sds_port_set_ready_state_handlers() -
1625 *
1626 * This macro sets the port ready substate handlers.
1627 */
1628#define scic_sds_port_set_ready_state_handlers(port, state_id) \
1629 scic_sds_port_set_state_handlers(\
1630 port, &scic_sds_port_ready_substate_handler_table[(state_id)] \
1631 )
1632
1633/*
1634 * ******************************************************************************
1635 * * PORT STATE PRIVATE METHODS
1636 * ****************************************************************************** */
1637
1638/**
1639 *
1640 * @sci_port: This is the struct scic_sds_port object to suspend.
1641 *
1642 * This method will susped the port task scheduler for this port object. none
1643 */
1644static void
1645scic_sds_port_suspend_port_task_scheduler(struct scic_sds_port *port)
1646{
1647 u32 pts_control_value;
1648
1649 pts_control_value = readl(&port->port_task_scheduler_registers->control);
1650 pts_control_value |= SCU_PTSxCR_GEN_BIT(SUSPEND);
1651 writel(pts_control_value, &port->port_task_scheduler_registers->control);
1652}
1653
1654/**
1655 * scic_sds_port_post_dummy_request() - post dummy/workaround request
1656 * @sci_port: port to post task
1657 *
1658 * Prevent the hardware scheduler from posting new requests to the front
1659 * of the scheduler queue causing a starvation problem for currently
1660 * ongoing requests.
1661 *
1662 */
1663static void scic_sds_port_post_dummy_request(struct scic_sds_port *sci_port)
1664{
1665 u32 command;
1666 struct scu_task_context *task_context;
1667 struct scic_sds_controller *scic = sci_port->owning_controller;
1668 u16 tci = sci_port->reserved_tci;
1669
1670 task_context = scic_sds_controller_get_task_context_buffer(scic, tci);
1671
1672 task_context->abort = 0;
1673
1674 command = SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
1675 sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT |
1676 tci;
1677
1678 scic_sds_controller_post_request(scic, command);
1679}
1680
1681/**
1682 * This routine will abort the dummy request. This will alow the hardware to
1683 * power down parts of the silicon to save power.
1684 *
1685 * @sci_port: The port on which the task must be aborted.
1686 *
1687 */
1688static void scic_sds_port_abort_dummy_request(struct scic_sds_port *sci_port)
1689{
1690 struct scic_sds_controller *scic = sci_port->owning_controller;
1691 u16 tci = sci_port->reserved_tci;
1692 struct scu_task_context *tc;
1693 u32 command;
1694
1695 tc = scic_sds_controller_get_task_context_buffer(scic, tci);
1696
1697 tc->abort = 1;
1698
1699 command = SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT |
1700 sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT |
1701 tci;
1702
1703 scic_sds_controller_post_request(scic, command);
1704}
1705
1706/**
1707 *
1708 * @sci_port: This is the struct scic_sds_port object to resume.
1709 *
1710 * This method will resume the port task scheduler for this port object. none
1711 */
1712static void
1713scic_sds_port_resume_port_task_scheduler(struct scic_sds_port *port)
1714{
1715 u32 pts_control_value;
1716
1717 pts_control_value = readl(&port->port_task_scheduler_registers->control);
1718 pts_control_value &= ~SCU_PTSxCR_GEN_BIT(SUSPEND);
1719 writel(pts_control_value, &port->port_task_scheduler_registers->control);
1720}
1721
1722/*
1723 * ******************************************************************************
1724 * * PORT READY SUBSTATE METHODS
1725 * ****************************************************************************** */
1726
1727/**
1728 *
1729 * @object: This is the object which is cast to a struct scic_sds_port object.
1730 *
1731 * This method will perform the actions required by the struct scic_sds_port on
1732 * entering the SCIC_SDS_PORT_READY_SUBSTATE_WAITING. This function checks the
1733 * port for any ready phys. If there is at least one phy in a ready state then
1734 * the port transitions to the ready operational substate. none
1735 */
1736static void scic_sds_port_ready_substate_waiting_enter(void *object)
1737{
1738 struct scic_sds_port *sci_port = object;
1739
1740 scic_sds_port_set_ready_state_handlers(
1741 sci_port, SCIC_SDS_PORT_READY_SUBSTATE_WAITING
1742 );
1743
1744 scic_sds_port_suspend_port_task_scheduler(sci_port);
1745
1746 sci_port->not_ready_reason = SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS;
1747
1748 if (sci_port->active_phy_mask != 0) {
1749 /* At least one of the phys on the port is ready */
1750 sci_base_state_machine_change_state(
1751 &sci_port->ready_substate_machine,
1752 SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL
1753 );
1754 }
1755}
1756
1757/**
1758 *
1759 * @object: This is the object which is cast to a struct scic_sds_port object.
1760 *
1761 * This function will perform the actions required by the struct scic_sds_port
1762 * on entering the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function sets
1763 * the state handlers for the port object, notifies the SCI User that the port
1764 * is ready, and resumes port operations. none
1765 */
1766static void scic_sds_port_ready_substate_operational_enter(void *object)
1767{
1768 u32 index;
1769 struct scic_sds_port *sci_port = object;
1770 struct scic_sds_controller *scic = sci_port->owning_controller;
1771 struct isci_host *ihost = scic_to_ihost(scic);
1772 struct isci_port *iport = sci_port_to_iport(sci_port);
1773
1774 scic_sds_port_set_ready_state_handlers(
1775 sci_port,
1776 SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL);
1777
1778 isci_port_ready(ihost, iport);
1779
1780 for (index = 0; index < SCI_MAX_PHYS; index++) {
1781 if (sci_port->phy_table[index]) {
1782 writel(sci_port->physical_port_index,
1783 &sci_port->port_pe_configuration_register[
1784 sci_port->phy_table[index]->phy_index]);
1785 }
1786 }
1787
1788 scic_sds_port_update_viit_entry(sci_port);
1789
1790 scic_sds_port_resume_port_task_scheduler(sci_port);
1791
1792 /*
1793 * Post the dummy task for the port so the hardware can schedule
1794 * io correctly
1795 */
1796 scic_sds_port_post_dummy_request(sci_port);
1797}
1798
1799/**
1800 *
1801 * @object: This is the object which is cast to a struct scic_sds_port object.
1802 *
1803 * This method will perform the actions required by the struct scic_sds_port on
1804 * exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports
1805 * the port not ready and suspends the port task scheduler. none
1806 */
1807static void scic_sds_port_ready_substate_operational_exit(void *object)
1808{
1809 struct scic_sds_port *sci_port = object;
1810 struct scic_sds_controller *scic = sci_port->owning_controller;
1811 struct isci_host *ihost = scic_to_ihost(scic);
1812 struct isci_port *iport = sci_port_to_iport(sci_port);
1813
1814 /*
1815 * Kill the dummy task for this port if it has not yet posted
1816 * the hardware will treat this as a NOP and just return abort
1817 * complete.
1818 */
1819 scic_sds_port_abort_dummy_request(sci_port);
1820
1821 isci_port_not_ready(ihost, iport);
1822}
1823
1824/*
1825 * ******************************************************************************
1826 * * PORT READY CONFIGURING METHODS
1827 * ****************************************************************************** */
1828
1829/**
1830 * scic_sds_port_ready_substate_configuring_enter() -
1831 * @object: This is the object which is cast to a struct scic_sds_port object.
1832 *
1833 * This method will perform the actions required by the struct scic_sds_port on
1834 * exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports
1835 * the port not ready and suspends the port task scheduler. none
1836 */
1837static void scic_sds_port_ready_substate_configuring_enter(void *object)
1838{
1839 struct scic_sds_port *sci_port = object;
1840 struct scic_sds_controller *scic = sci_port->owning_controller;
1841 struct isci_host *ihost = scic_to_ihost(scic);
1842 struct isci_port *iport = sci_port_to_iport(sci_port);
1843
1844 scic_sds_port_set_ready_state_handlers(
1845 sci_port,
1846 SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING);
1847
1848 if (sci_port->active_phy_mask == 0) {
1849 isci_port_not_ready(ihost, iport);
1850
1851 sci_base_state_machine_change_state(
1852 &sci_port->ready_substate_machine,
1853 SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
1854 } else if (sci_port->started_request_count == 0)
1855 sci_base_state_machine_change_state(
1856 &sci_port->ready_substate_machine,
1857 SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL);
1858}
1859
1860static void scic_sds_port_ready_substate_configuring_exit(void *object)
1861{
1862 struct scic_sds_port *sci_port = object;
1863
1864 scic_sds_port_suspend_port_task_scheduler(sci_port);
1865}
1866
1867/* --------------------------------------------------------------------------- */
1868
1869static const struct sci_base_state scic_sds_port_ready_substate_table[] = {
1870 [SCIC_SDS_PORT_READY_SUBSTATE_WAITING] = {
1871 .enter_state = scic_sds_port_ready_substate_waiting_enter,
1872 },
1873 [SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL] = {
1874 .enter_state = scic_sds_port_ready_substate_operational_enter,
1875 .exit_state = scic_sds_port_ready_substate_operational_exit
1876 },
1877 [SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING] = {
1878 .enter_state = scic_sds_port_ready_substate_configuring_enter,
1879 .exit_state = scic_sds_port_ready_substate_configuring_exit
1880 },
1881};
1882
1883/**
1884 *
1885 * @port: This is the struct scic_sds_port object on which the io request count will
1886 * be decremented.
1887 * @device: This is the struct scic_sds_remote_device object to which the io request
1888 * is being directed. This parameter is not required to complete this
1889 * operation.
1890 * @io_request: This is the request that is being completed on this port
1891 * object. This parameter is not required to complete this operation.
1892 *
1893 * This is a general complete io request handler for the struct scic_sds_port object.
1894 * enum sci_status SCI_SUCCESS
1895 */
1896static enum sci_status scic_sds_port_general_complete_io_handler(
1897 struct scic_sds_port *port,
1898 struct scic_sds_remote_device *device,
1899 struct scic_sds_request *io_request)
1900{
1901 scic_sds_port_decrement_request_count(port);
1902
1903 return SCI_SUCCESS;
1904}
1905
1906/**
1907 * scic_sds_port_stopped_state_start_handler() - stop a port from "started"
1908 *
1909 * @port: This is the struct scic_sds_port object which is cast into a
1910 * struct scic_sds_port object.
1911 *
1912 * This function takes the struct scic_sds_port from a stopped state and
1913 * attempts to start it. To start a port it must have no assiged devices and
1914 * it must have at least one phy assigned to it. If those conditions are
1915 * met then the port can transition to the ready state.
1916 * enum sci_status
1917 * SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION
1918 * This struct scic_sds_port object could not be started because the port
1919 * configuration is not valid.
1920 * SCI_SUCCESS
1921 * the start request is successful and the struct scic_sds_port object
1922 * has transitioned to the SCI_BASE_PORT_STATE_READY.
1923 */
1924static enum sci_status
1925scic_sds_port_stopped_state_start_handler(struct scic_sds_port *sci_port)
1926{
1927 struct scic_sds_controller *scic = sci_port->owning_controller;
1928 struct isci_host *ihost = scic_to_ihost(scic);
1929 enum sci_status status = SCI_SUCCESS;
1930 u32 phy_mask;
1931
1932 if (sci_port->assigned_device_count > 0) {
1933 /*
1934 * @todo This is a start failure operation because
1935 * there are still devices assigned to this port.
1936 * There must be no devices assigned to a port on a
1937 * start operation.
1938 */
1939 return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
1940 }
1941
1942 sci_port->timer_handle =
1943 isci_timer_create(ihost,
1944 sci_port,
1945 scic_sds_port_timeout_handler);
1946
1947 if (!sci_port->timer_handle)
1948 return SCI_FAILURE_INSUFFICIENT_RESOURCES;
1949
1950 if (sci_port->reserved_rni == SCU_DUMMY_INDEX) {
1951 u16 rni = scic_sds_remote_node_table_allocate_remote_node(
1952 &scic->available_remote_nodes, 1);
1953
1954 if (rni != SCU_DUMMY_INDEX)
1955 scic_sds_port_construct_dummy_rnc(sci_port, rni);
1956 else
1957 status = SCI_FAILURE_INSUFFICIENT_RESOURCES;
1958 sci_port->reserved_rni = rni;
1959 }
1960
1961 if (sci_port->reserved_tci == SCU_DUMMY_INDEX) {
1962 /* Allocate a TCI and remove the sequence nibble */
1963 u16 tci = scic_controller_allocate_io_tag(scic);
1964
1965 if (tci != SCU_DUMMY_INDEX)
1966 scic_sds_port_construct_dummy_task(sci_port, tci);
1967 else
1968 status = SCI_FAILURE_INSUFFICIENT_RESOURCES;
1969 sci_port->reserved_tci = tci;
1970 }
1971
1972 if (status == SCI_SUCCESS) {
1973 phy_mask = scic_sds_port_get_phys(sci_port);
1974
1975 /*
1976 * There are one or more phys assigned to this port. Make sure
1977 * the port's phy mask is in fact legal and supported by the
1978 * silicon.
1979 */
1980 if (scic_sds_port_is_phy_mask_valid(sci_port, phy_mask) == true) {
1981 sci_base_state_machine_change_state(
1982 &sci_port->state_machine,
1983 SCI_BASE_PORT_STATE_READY);
1984
1985 return SCI_SUCCESS;
1986 } else
1987 status = SCI_FAILURE;
1988 }
1989
1990 if (status != SCI_SUCCESS)
1991 scic_sds_port_destroy_dummy_resources(sci_port);
1992
1993 return status;
1994}
1995
1996/*
1997 * This method takes the struct scic_sds_port that is in a stopped state and handles a
1998 * stop request. This function takes no action. enum sci_status SCI_SUCCESS the
1999 * stop request is successful as the struct scic_sds_port object is already stopped.
2000 */
2001static enum sci_status scic_sds_port_stopped_state_stop_handler(
2002 struct scic_sds_port *port)
2003{
2004 /* We are already stopped so there is nothing to do here */
2005 return SCI_SUCCESS;
2006}
2007
2008/*
2009 * This method takes the struct scic_sds_port that is in a stopped state and handles
2010 * the destruct request. The stopped state is the only state in which the
2011 * struct scic_sds_port can be destroyed. This function causes the port object to
2012 * transition to the SCI_BASE_PORT_STATE_FINAL. enum sci_status SCI_SUCCESS
2013 */
2014static enum sci_status scic_sds_port_stopped_state_destruct_handler(
2015 struct scic_sds_port *port)
2016{
2017 sci_base_state_machine_stop(&port->state_machine);
2018
2019 return SCI_SUCCESS;
2020}
2021
2022/*
2023 * This method takes the struct scic_sds_port that is in a stopped state and handles
2024 * the add phy request. In MPC mode the only time a phy can be added to a port
2025 * is in the SCI_BASE_PORT_STATE_STOPPED. enum sci_status
2026 * SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION is returned when the phy can not
2027 * be added to the port. SCI_SUCCESS if the phy is added to the port.
2028 */
2029static enum sci_status scic_sds_port_stopped_state_add_phy_handler(
2030 struct scic_sds_port *port,
2031 struct scic_sds_phy *phy)
2032{
2033 struct sci_sas_address port_sas_address;
2034
2035 /* Read the port assigned SAS Address if there is one */
2036 scic_sds_port_get_sas_address(port, &port_sas_address);
2037
2038 if (port_sas_address.high != 0 && port_sas_address.low != 0) {
2039 struct sci_sas_address phy_sas_address;
2040
2041 /*
2042 * Make sure that the PHY SAS Address matches the SAS Address
2043 * for this port. */
2044 scic_sds_phy_get_sas_address(phy, &phy_sas_address);
2045
2046 if (
2047 (port_sas_address.high != phy_sas_address.high)
2048 || (port_sas_address.low != phy_sas_address.low)
2049 ) {
2050 return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
2051 }
2052 }
2053
2054 return scic_sds_port_set_phy(port, phy);
2055}
2056
2057/*
2058 * This method takes the struct scic_sds_port that is in a stopped state and handles
2059 * the remove phy request. In MPC mode the only time a phy can be removed from
2060 * a port is in the SCI_BASE_PORT_STATE_STOPPED. enum sci_status
2061 * SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION is returned when the phy can not
2062 * be added to the port. SCI_SUCCESS if the phy is added to the port.
2063 */
2064static enum sci_status scic_sds_port_stopped_state_remove_phy_handler(
2065 struct scic_sds_port *port,
2066 struct scic_sds_phy *phy)
2067{
2068 return scic_sds_port_clear_phy(port, phy);
2069}
2070
2071/*
2072 * ****************************************************************************
2073 * * READY STATE HANDLERS
2074 * **************************************************************************** */
2075
2076/*
2077 * ****************************************************************************
2078 * * RESETTING STATE HANDLERS
2079 * **************************************************************************** */
2080
2081/*
2082 * ****************************************************************************
2083 * * STOPPING STATE HANDLERS
2084 * **************************************************************************** */
2085
2086/*
2087 * This method takes the struct scic_sds_port that is in a stopping state and handles
2088 * the complete io request. Should the request count reach 0 then the port
2089 * object will transition to the stopped state. enum sci_status SCI_SUCCESS
2090 */
2091static enum sci_status scic_sds_port_stopping_state_complete_io_handler(
2092 struct scic_sds_port *sci_port,
2093 struct scic_sds_remote_device *device,
2094 struct scic_sds_request *io_request)
2095{
2096 scic_sds_port_decrement_request_count(sci_port);
2097
2098 if (sci_port->started_request_count == 0) {
2099 sci_base_state_machine_change_state(&sci_port->state_machine,
2100 SCI_BASE_PORT_STATE_STOPPED);
2101 }
2102
2103 return SCI_SUCCESS;
2104}
2105
2106/*
2107 * ****************************************************************************
2108 * * RESETTING STATE HANDLERS
2109 * **************************************************************************** */
2110
2111/**
2112 *
2113 * @port: This is the port object which is being requested to stop.
2114 *
2115 * This method will stop a failed port. This causes a transition to the
2116 * stopping state. enum sci_status SCI_SUCCESS
2117 */
2118static enum sci_status scic_sds_port_reset_state_stop_handler(
2119 struct scic_sds_port *port)
2120{
2121 sci_base_state_machine_change_state(
2122 &port->state_machine,
2123 SCI_BASE_PORT_STATE_STOPPING
2124 );
2125
2126 return SCI_SUCCESS;
2127}
2128
2129/*
2130 * This method will transition a failed port to its ready state. The port
2131 * failed because a hard reset request timed out but at some time later one or
2132 * more phys in the port became ready. enum sci_status SCI_SUCCESS
2133 */
2134static void scic_sds_port_reset_state_link_up_handler(
2135 struct scic_sds_port *port,
2136 struct scic_sds_phy *phy)
2137{
2138 /*
2139 * / @todo We should make sure that the phy that has gone link up is the same
2140 * / one on which we sent the reset. It is possible that the phy on
2141 * / which we sent the reset is not the one that has gone link up and we
2142 * / want to make sure that phy being reset comes back. Consider the
2143 * / case where a reset is sent but before the hardware processes the
2144 * / reset it get a link up on the port because of a hot plug event.
2145 * / because of the reset request this phy will go link down almost
2146 * / immediately. */
2147
2148 /*
2149 * In the resetting state we don't notify the user regarding
2150 * link up and link down notifications. */
2151 scic_sds_port_general_link_up_handler(port, phy, false);
2152}
2153
2154/*
2155 * This method process link down notifications that occur during a port reset
2156 * operation. Link downs can occur during the reset operation. enum sci_status
2157 * SCI_SUCCESS
2158 */
2159static void scic_sds_port_reset_state_link_down_handler(
2160 struct scic_sds_port *port,
2161 struct scic_sds_phy *phy)
2162{
2163 /*
2164 * In the resetting state we don't notify the user regarding
2165 * link up and link down notifications. */
2166 scic_sds_port_deactivate_phy(port, phy, false);
2167}
2168
2169static struct scic_sds_port_state_handler
2170scic_sds_port_state_handler_table[SCI_BASE_PORT_MAX_STATES] =
2171{
2172 /* SCI_BASE_PORT_STATE_STOPPED */
2173 {
2174 scic_sds_port_stopped_state_start_handler,
2175 scic_sds_port_stopped_state_stop_handler,
2176 scic_sds_port_stopped_state_destruct_handler,
2177 scic_sds_port_default_reset_handler,
2178 scic_sds_port_stopped_state_add_phy_handler,
2179 scic_sds_port_stopped_state_remove_phy_handler,
2180 scic_sds_port_default_frame_handler,
2181 scic_sds_port_default_event_handler,
2182 scic_sds_port_default_link_up_handler,
2183 scic_sds_port_default_link_down_handler,
2184 scic_sds_port_default_start_io_handler,
2185 scic_sds_port_default_complete_io_handler
2186 },
2187 /* SCI_BASE_PORT_STATE_STOPPING */
2188 {
2189 scic_sds_port_default_start_handler,
2190 scic_sds_port_default_stop_handler,
2191 scic_sds_port_default_destruct_handler,
2192 scic_sds_port_default_reset_handler,
2193 scic_sds_port_default_add_phy_handler,
2194 scic_sds_port_default_remove_phy_handler,
2195 scic_sds_port_default_frame_handler,
2196 scic_sds_port_default_event_handler,
2197 scic_sds_port_default_link_up_handler,
2198 scic_sds_port_default_link_down_handler,
2199 scic_sds_port_default_start_io_handler,
2200 scic_sds_port_stopping_state_complete_io_handler
2201 },
2202 /* SCI_BASE_PORT_STATE_READY */
2203 {
2204 scic_sds_port_default_start_handler,
2205 scic_sds_port_default_stop_handler,
2206 scic_sds_port_default_destruct_handler,
2207 scic_sds_port_default_reset_handler,
2208 scic_sds_port_default_add_phy_handler,
2209 scic_sds_port_default_remove_phy_handler,
2210 scic_sds_port_default_frame_handler,
2211 scic_sds_port_default_event_handler,
2212 scic_sds_port_default_link_up_handler,
2213 scic_sds_port_default_link_down_handler,
2214 scic_sds_port_default_start_io_handler,
2215 scic_sds_port_general_complete_io_handler
2216 },
2217 /* SCI_BASE_PORT_STATE_RESETTING */
2218 {
2219 scic_sds_port_default_start_handler,
2220 scic_sds_port_reset_state_stop_handler,
2221 scic_sds_port_default_destruct_handler,
2222 scic_sds_port_default_reset_handler,
2223 scic_sds_port_default_add_phy_handler,
2224 scic_sds_port_default_remove_phy_handler,
2225 scic_sds_port_default_frame_handler,
2226 scic_sds_port_default_event_handler,
2227 scic_sds_port_reset_state_link_up_handler,
2228 scic_sds_port_reset_state_link_down_handler,
2229 scic_sds_port_default_start_io_handler,
2230 scic_sds_port_general_complete_io_handler
2231 },
2232 /* SCI_BASE_PORT_STATE_FAILED */
2233 {
2234 scic_sds_port_default_start_handler,
2235 scic_sds_port_default_stop_handler,
2236 scic_sds_port_default_destruct_handler,
2237 scic_sds_port_default_reset_handler,
2238 scic_sds_port_default_add_phy_handler,
2239 scic_sds_port_default_remove_phy_handler,
2240 scic_sds_port_default_frame_handler,
2241 scic_sds_port_default_event_handler,
2242 scic_sds_port_default_link_up_handler,
2243 scic_sds_port_default_link_down_handler,
2244 scic_sds_port_default_start_io_handler,
2245 scic_sds_port_general_complete_io_handler
2246 }
2247};
2248
2249/*
2250 * ******************************************************************************
2251 * * PORT STATE PRIVATE METHODS
2252 * ****************************************************************************** */
2253
2254/**
2255 *
2256 * @sci_port: This is the port object which to suspend.
2257 *
2258 * This method will enable the SCU Port Task Scheduler for this port object but
2259 * will leave the port task scheduler in a suspended state. none
2260 */
2261static void
2262scic_sds_port_enable_port_task_scheduler(struct scic_sds_port *port)
2263{
2264 u32 pts_control_value;
2265
2266 pts_control_value = readl(&port->port_task_scheduler_registers->control);
2267 pts_control_value |= SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND);
2268 writel(pts_control_value, &port->port_task_scheduler_registers->control);
2269}
2270
2271/**
2272 *
2273 * @sci_port: This is the port object which to resume.
2274 *
2275 * This method will disable the SCU port task scheduler for this port object.
2276 * none
2277 */
2278static void
2279scic_sds_port_disable_port_task_scheduler(struct scic_sds_port *port)
2280{
2281 u32 pts_control_value;
2282
2283 pts_control_value = readl(&port->port_task_scheduler_registers->control);
2284 pts_control_value &=
2285 ~(SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND));
2286 writel(pts_control_value, &port->port_task_scheduler_registers->control);
2287}
2288
2289static void scic_sds_port_post_dummy_remote_node(struct scic_sds_port *sci_port)
2290{
2291 struct scic_sds_controller *scic = sci_port->owning_controller;
2292 u8 phys_index = sci_port->physical_port_index;
2293 union scu_remote_node_context *rnc;
2294 u16 rni = sci_port->reserved_rni;
2295 u32 command;
2296
2297 rnc = &scic->remote_node_context_table[rni];
2298 rnc->ssp.is_valid = true;
2299
2300 command = SCU_CONTEXT_COMMAND_POST_RNC_32 |
2301 phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
2302
2303 scic_sds_controller_post_request(scic, command);
2304
2305 /* ensure hardware has seen the post rnc command and give it
2306 * ample time to act before sending the suspend
2307 */
2308 readl(&scic->smu_registers->interrupt_status); /* flush */
2309 udelay(10);
2310
2311 command = SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX |
2312 phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
2313
2314 scic_sds_controller_post_request(scic, command);
2315}
2316
2317static void scic_sds_port_invalidate_dummy_remote_node(struct scic_sds_port *sci_port)
2318{
2319 struct scic_sds_controller *scic = sci_port->owning_controller;
2320 u8 phys_index = sci_port->physical_port_index;
2321 union scu_remote_node_context *rnc;
2322 u16 rni = sci_port->reserved_rni;
2323 u32 command;
2324
2325 rnc = &scic->remote_node_context_table[rni];
2326
2327 rnc->ssp.is_valid = false;
2328
2329 /* ensure the preceding tc abort request has reached the
2330 * controller and give it ample time to act before posting the rnc
2331 * invalidate
2332 */
2333 readl(&scic->smu_registers->interrupt_status); /* flush */
2334 udelay(10);
2335
2336 command = SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE |
2337 phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
2338
2339 scic_sds_controller_post_request(scic, command);
2340}
2341
2342/*
2343 * ******************************************************************************
2344 * * PORT STATE METHODS
2345 * ****************************************************************************** */
2346
2347/**
2348 *
2349 * @object: This is the object which is cast to a struct scic_sds_port object.
2350 *
2351 * This method will perform the actions required by the struct scic_sds_port on
2352 * entering the SCI_BASE_PORT_STATE_STOPPED. This function sets the stopped
2353 * state handlers for the struct scic_sds_port object and disables the port task
2354 * scheduler in the hardware. none
2355 */
2356static void scic_sds_port_stopped_state_enter(void *object)
2357{
2358 struct scic_sds_port *sci_port = object;
2359
2360 scic_sds_port_set_base_state_handlers(
2361 sci_port, SCI_BASE_PORT_STATE_STOPPED
2362 );
2363
2364 if (
2365 SCI_BASE_PORT_STATE_STOPPING
2366 == sci_port->state_machine.previous_state_id
2367 ) {
2368 /*
2369 * If we enter this state becasuse of a request to stop
2370 * the port then we want to disable the hardwares port
2371 * task scheduler. */
2372 scic_sds_port_disable_port_task_scheduler(sci_port);
2373 }
2374}
2375
2376/**
2377 *
2378 * @object: This is the object which is cast to a struct scic_sds_port object.
2379 *
2380 * This method will perform the actions required by the struct scic_sds_port on
2381 * exiting the SCI_BASE_STATE_STOPPED. This function enables the SCU hardware
2382 * port task scheduler. none
2383 */
2384static void scic_sds_port_stopped_state_exit(void *object)
2385{
2386 struct scic_sds_port *sci_port = object;
2387
2388 /* Enable and suspend the port task scheduler */
2389 scic_sds_port_enable_port_task_scheduler(sci_port);
2390}
2391
2392/**
2393 * scic_sds_port_ready_state_enter -
2394 * @object: This is the object which is cast to a struct scic_sds_port object.
2395 *
2396 * This method will perform the actions required by the struct scic_sds_port on
2397 * entering the SCI_BASE_PORT_STATE_READY. This function sets the ready state
2398 * handlers for the struct scic_sds_port object, reports the port object as
2399 * not ready and starts the ready substate machine. none
2400 */
2401static void scic_sds_port_ready_state_enter(void *object)
2402{
2403 struct scic_sds_port *sci_port = object;
2404 struct scic_sds_controller *scic = sci_port->owning_controller;
2405 struct isci_host *ihost = scic_to_ihost(scic);
2406 struct isci_port *iport = sci_port_to_iport(sci_port);
2407 u32 prev_state;
2408
2409 /* Put the ready state handlers in place though they will not be there long */
2410 scic_sds_port_set_base_state_handlers(sci_port, SCI_BASE_PORT_STATE_READY);
2411
2412 prev_state = sci_port->state_machine.previous_state_id;
2413 if (prev_state == SCI_BASE_PORT_STATE_RESETTING)
2414 isci_port_hard_reset_complete(iport, SCI_SUCCESS);
2415 else
2416 isci_port_not_ready(ihost, iport);
2417
2418 /* Post and suspend the dummy remote node context for this port. */
2419 scic_sds_port_post_dummy_remote_node(sci_port);
2420
2421 /* Start the ready substate machine */
2422 sci_base_state_machine_start(&sci_port->ready_substate_machine);
2423}
2424
2425static void scic_sds_port_ready_state_exit(void *object)
2426{
2427 struct scic_sds_port *sci_port = object;
2428
2429 sci_base_state_machine_stop(&sci_port->ready_substate_machine);
2430 scic_sds_port_invalidate_dummy_remote_node(sci_port);
2431}
2432
2433/**
2434 *
2435 * @object: This is the object which is cast to a struct scic_sds_port object.
2436 *
2437 * This method will perform the actions required by the struct scic_sds_port on
2438 * entering the SCI_BASE_PORT_STATE_RESETTING. This function sets the resetting
2439 * state handlers for the struct scic_sds_port object. none
2440 */
2441static void scic_sds_port_resetting_state_enter(void *object)
2442{
2443 struct scic_sds_port *sci_port = object;
2444
2445 scic_sds_port_set_base_state_handlers(
2446 sci_port, SCI_BASE_PORT_STATE_RESETTING
2447 );
2448}
2449
2450/**
2451 *
2452 * @object: This is the object which is cast to a struct scic_sds_port object.
2453 *
2454 * This function will perform the actions required by the
2455 * struct scic_sds_port on
2456 * exiting the SCI_BASE_STATE_RESETTING. This function does nothing. none
2457 */
2458static inline void scic_sds_port_resetting_state_exit(void *object)
2459{
2460 struct scic_sds_port *sci_port = object;
2461
2462 isci_timer_stop(sci_port->timer_handle);
2463}
2464
2465/**
2466 *
2467 * @object: This is the void object which is cast to a
2468 * struct scic_sds_port object.
2469 *
2470 * This method will perform the actions required by the struct scic_sds_port on
2471 * entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping
2472 * state handlers for the struct scic_sds_port object. none
2473 */
2474static void scic_sds_port_stopping_state_enter(void *object)
2475{
2476 struct scic_sds_port *sci_port = object;
2477
2478 scic_sds_port_set_base_state_handlers(
2479 sci_port, SCI_BASE_PORT_STATE_STOPPING
2480 );
2481}
2482
2483/**
2484 *
2485 * @object: This is the object which is cast to a struct scic_sds_port object.
2486 *
2487 * This function will perform the actions required by the
2488 * struct scic_sds_port on
2489 * exiting the SCI_BASE_STATE_STOPPING. This function does nothing. none
2490 */
2491static inline void
2492scic_sds_port_stopping_state_exit(void *object)
2493{
2494 struct scic_sds_port *sci_port = object;
2495
2496 isci_timer_stop(sci_port->timer_handle);
2497
2498 scic_sds_port_destroy_dummy_resources(sci_port);
2499}
2500
2501/**
2502 *
2503 * @object: This is the object which is cast to a struct scic_sds_port object.
2504 *
2505 * This function will perform the actions required by the
2506 * struct scic_sds_port on
2507 * entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping
2508 * state handlers for the struct scic_sds_port object. none
2509 */
2510static void scic_sds_port_failed_state_enter(void *object)
2511{
2512 struct scic_sds_port *sci_port = object;
2513 struct isci_port *iport = sci_port_to_iport(sci_port);
2514
2515 scic_sds_port_set_base_state_handlers(sci_port,
2516 SCI_BASE_PORT_STATE_FAILED);
2517
2518 isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT);
2519}
2520
2521/* --------------------------------------------------------------------------- */
2522
2523static const struct sci_base_state scic_sds_port_state_table[] = {
2524 [SCI_BASE_PORT_STATE_STOPPED] = {
2525 .enter_state = scic_sds_port_stopped_state_enter,
2526 .exit_state = scic_sds_port_stopped_state_exit
2527 },
2528 [SCI_BASE_PORT_STATE_STOPPING] = {
2529 .enter_state = scic_sds_port_stopping_state_enter,
2530 .exit_state = scic_sds_port_stopping_state_exit
2531 },
2532 [SCI_BASE_PORT_STATE_READY] = {
2533 .enter_state = scic_sds_port_ready_state_enter,
2534 .exit_state = scic_sds_port_ready_state_exit
2535 },
2536 [SCI_BASE_PORT_STATE_RESETTING] = {
2537 .enter_state = scic_sds_port_resetting_state_enter,
2538 .exit_state = scic_sds_port_resetting_state_exit
2539 },
2540 [SCI_BASE_PORT_STATE_FAILED] = {
2541 .enter_state = scic_sds_port_failed_state_enter,
2542 }
2543};
2544
2545void scic_sds_port_construct(struct scic_sds_port *sci_port, u8 index,
2546 struct scic_sds_controller *scic)
2547{
2548 sci_base_state_machine_construct(&sci_port->state_machine,
2549 sci_port,
2550 scic_sds_port_state_table,
2551 SCI_BASE_PORT_STATE_STOPPED);
2552
2553 sci_base_state_machine_start(&sci_port->state_machine);
2554
2555 sci_base_state_machine_construct(&sci_port->ready_substate_machine,
2556 sci_port,
2557 scic_sds_port_ready_substate_table,
2558 SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
2559
2560 sci_port->logical_port_index = SCIC_SDS_DUMMY_PORT;
2561 sci_port->physical_port_index = index;
2562 sci_port->active_phy_mask = 0;
2563
2564 sci_port->owning_controller = scic;
2565
2566 sci_port->started_request_count = 0;
2567 sci_port->assigned_device_count = 0;
2568
2569 sci_port->reserved_rni = SCU_DUMMY_INDEX;
2570 sci_port->reserved_tci = SCU_DUMMY_INDEX;
2571
2572 sci_port->timer_handle = NULL;
2573 sci_port->port_task_scheduler_registers = NULL;
2574
2575 for (index = 0; index < SCI_MAX_PHYS; index++)
2576 sci_port->phy_table[index] = NULL;
2577}
2578
2579void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index)
2580{
2581 INIT_LIST_HEAD(&iport->remote_dev_list);
2582 INIT_LIST_HEAD(&iport->domain_dev_list);
2583 spin_lock_init(&iport->state_lock);
2584 init_completion(&iport->start_complete);
2585 iport->isci_host = ihost;
2586 isci_port_change_state(iport, isci_freed);
2587}
2588
2589/**
2590 * isci_port_get_state() - This function gets the status of the port object.
2591 * @isci_port: This parameter points to the isci_port object
2592 *
2593 * status of the object as a isci_status enum.
2594 */
2595enum isci_status isci_port_get_state(
2596 struct isci_port *isci_port)
2597{
2598 return isci_port->status;
2599}
2600
2601static void isci_port_bc_change_received(struct isci_host *ihost,
2602 struct scic_sds_port *sci_port,
2603 struct scic_sds_phy *sci_phy)
2604{
2605 struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
2606
2607 dev_dbg(&ihost->pdev->dev, "%s: iphy = %p, sas_phy = %p\n",
2608 __func__, iphy, &iphy->sas_phy);
2609
2610 ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD);
2611 scic_port_enable_broadcast_change_notification(sci_port);
2612}
2613
2614void scic_sds_port_broadcast_change_received(
2615 struct scic_sds_port *sci_port,
2616 struct scic_sds_phy *sci_phy)
2617{
2618 struct scic_sds_controller *scic = sci_port->owning_controller;
2619 struct isci_host *ihost = scic_to_ihost(scic);
2620
2621 /* notify the user. */
2622 isci_port_bc_change_received(ihost, sci_port, sci_phy);
2623}
2624
309int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
310 struct isci_phy *iphy)
311{
312 unsigned long flags;
313 enum sci_status status;
314 int ret = TMF_RESP_FUNC_COMPLETE;
315
316 dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n",

--- 37 unchanged lines hidden (view full) ---

354 __func__, iport, iport->hard_reset_status, iphy);
355
356 isci_port_link_down(ihost, iphy, iport);
357 }
358
359 return ret;
360}
361
2625int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
2626 struct isci_phy *iphy)
2627{
2628 unsigned long flags;
2629 enum sci_status status;
2630 int ret = TMF_RESP_FUNC_COMPLETE;
2631
2632 dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n",

--- 37 unchanged lines hidden (view full) ---

2670 __func__, iport, iport->hard_reset_status, iphy);
2671
2672 isci_port_link_down(ihost, iphy, iport);
2673 }
2674
2675 return ret;
2676}
2677
362void isci_port_stop_complete(struct scic_sds_controller *scic,
363 struct scic_sds_port *sci_port,
364 enum sci_status completion_status)
2678/**
2679 * isci_port_deformed() - This function is called by libsas when a port becomes
2680 * inactive.
2681 * @phy: This parameter specifies the libsas phy with the inactive port.
2682 *
2683 */
2684void isci_port_deformed(struct asd_sas_phy *phy)
365{
2685{
366 dev_dbg(&scic_to_ihost(scic)->pdev->dev, "Port stop complete\n");
2686 pr_debug("%s: sas_phy = %p\n", __func__, phy);
367}
2687}
2688
2689/**
2690 * isci_port_formed() - This function is called by libsas when a port becomes
2691 * active.
2692 * @phy: This parameter specifies the libsas phy with the active port.
2693 *
2694 */
2695void isci_port_formed(struct asd_sas_phy *phy)
2696{
2697 pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port);
2698}