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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
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20 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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60 #define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000)
61 #define SCU_DUMMY_INDEX (0xFFFF)
63 static void isci_port_change_state(struct isci_port
*iport
, enum isci_status status
)
67 dev_dbg(&iport
->isci_host
->pdev
->dev
,
68 "%s: iport = %p, state = 0x%x\n",
69 __func__
, iport
, status
);
71 /* XXX pointless lock */
72 spin_lock_irqsave(&iport
->state_lock
, flags
);
73 iport
->status
= status
;
74 spin_unlock_irqrestore(&iport
->state_lock
, flags
);
78 * This function will indicate which protocols are supported by this port.
79 * @sci_port: a handle corresponding to the SAS port for which to return the
80 * supported protocols.
81 * @protocols: This parameter specifies a pointer to a data structure
82 * which the core will copy the protocol values for the port from the
83 * transmit_identification register.
86 scic_sds_port_get_protocols(struct isci_port
*iport
,
87 struct scic_phy_proto
*protocols
)
93 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
94 if (iport
->phy_table
[index
] != NULL
) {
95 scic_sds_phy_get_protocols(iport
->phy_table
[index
],
102 * This method requests a list (mask) of the phys contained in the supplied SAS
104 * @sci_port: a handle corresponding to the SAS port for which to return the
107 * Return a bit mask indicating which phys are a part of this port. Each bit
108 * corresponds to a phy identifier (e.g. bit 0 = phy id 0).
110 static u32
scic_sds_port_get_phys(struct isci_port
*iport
)
117 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
118 if (iport
->phy_table
[index
] != NULL
) {
119 mask
|= (1 << index
);
127 * scic_port_get_properties() - This method simply returns the properties
128 * regarding the port, such as: physical index, protocols, sas address, etc.
129 * @port: this parameter specifies the port for which to retrieve the physical
131 * @properties: This parameter specifies the properties structure into which to
132 * copy the requested information.
134 * Indicate if the user specified a valid port. SCI_SUCCESS This value is
135 * returned if the specified port was valid. SCI_FAILURE_INVALID_PORT This
136 * value is returned if the specified port is not valid. When this value is
137 * returned, no data is copied to the properties output parameter.
139 static enum sci_status
scic_port_get_properties(struct isci_port
*iport
,
140 struct scic_port_properties
*prop
)
142 if (!iport
|| iport
->logical_port_index
== SCIC_SDS_DUMMY_PORT
)
143 return SCI_FAILURE_INVALID_PORT
;
145 prop
->index
= iport
->logical_port_index
;
146 prop
->phy_mask
= scic_sds_port_get_phys(iport
);
147 scic_sds_port_get_sas_address(iport
, &prop
->local
.sas_address
);
148 scic_sds_port_get_protocols(iport
, &prop
->local
.protocols
);
149 scic_sds_port_get_attached_sas_address(iport
, &prop
->remote
.sas_address
);
154 static void scic_port_bcn_enable(struct isci_port
*iport
)
156 struct isci_phy
*iphy
;
160 for (i
= 0; i
< ARRAY_SIZE(iport
->phy_table
); i
++) {
161 iphy
= iport
->phy_table
[i
];
164 val
= readl(&iphy
->link_layer_registers
->link_layer_control
);
165 /* clear the bit by writing 1. */
166 writel(val
, &iphy
->link_layer_registers
->link_layer_control
);
170 /* called under scic_lock to stabilize phy:port associations */
171 void isci_port_bcn_enable(struct isci_host
*ihost
, struct isci_port
*iport
)
175 clear_bit(IPORT_BCN_BLOCKED
, &iport
->flags
);
176 wake_up(&ihost
->eventq
);
178 if (!test_and_clear_bit(IPORT_BCN_PENDING
, &iport
->flags
))
181 for (i
= 0; i
< ARRAY_SIZE(iport
->phy_table
); i
++) {
182 struct isci_phy
*iphy
= iport
->phy_table
[i
];
187 ihost
->sas_ha
.notify_port_event(&iphy
->sas_phy
,
188 PORTE_BROADCAST_RCVD
);
193 static void isci_port_bc_change_received(struct isci_host
*ihost
,
194 struct isci_port
*iport
,
195 struct isci_phy
*iphy
)
197 if (iport
&& test_bit(IPORT_BCN_BLOCKED
, &iport
->flags
)) {
198 dev_dbg(&ihost
->pdev
->dev
,
199 "%s: disabled BCN; isci_phy = %p, sas_phy = %p\n",
200 __func__
, iphy
, &iphy
->sas_phy
);
201 set_bit(IPORT_BCN_PENDING
, &iport
->flags
);
202 atomic_inc(&iport
->event
);
203 wake_up(&ihost
->eventq
);
205 dev_dbg(&ihost
->pdev
->dev
,
206 "%s: isci_phy = %p, sas_phy = %p\n",
207 __func__
, iphy
, &iphy
->sas_phy
);
209 ihost
->sas_ha
.notify_port_event(&iphy
->sas_phy
,
210 PORTE_BROADCAST_RCVD
);
212 scic_port_bcn_enable(iport
);
215 static void isci_port_link_up(struct isci_host
*isci_host
,
216 struct isci_port
*iport
,
217 struct isci_phy
*iphy
)
220 struct scic_port_properties properties
;
221 unsigned long success
= true;
223 BUG_ON(iphy
->isci_port
!= NULL
);
225 iphy
->isci_port
= iport
;
227 dev_dbg(&isci_host
->pdev
->dev
,
228 "%s: isci_port = %p\n",
231 spin_lock_irqsave(&iphy
->sas_phy
.frame_rcvd_lock
, flags
);
233 isci_port_change_state(iphy
->isci_port
, isci_starting
);
235 scic_port_get_properties(iport
, &properties
);
237 if (iphy
->protocol
== SCIC_SDS_PHY_PROTOCOL_SATA
) {
238 u64 attached_sas_address
;
240 iphy
->sas_phy
.oob_mode
= SATA_OOB_MODE
;
241 iphy
->sas_phy
.frame_rcvd_size
= sizeof(struct dev_to_host_fis
);
244 * For direct-attached SATA devices, the SCI core will
245 * automagically assign a SAS address to the end device
246 * for the purpose of creating a port. This SAS address
247 * will not be the same as assigned to the PHY and needs
248 * to be obtained from struct scic_port_properties properties.
250 attached_sas_address
= properties
.remote
.sas_address
.high
;
251 attached_sas_address
<<= 32;
252 attached_sas_address
|= properties
.remote
.sas_address
.low
;
253 swab64s(&attached_sas_address
);
255 memcpy(&iphy
->sas_phy
.attached_sas_addr
,
256 &attached_sas_address
, sizeof(attached_sas_address
));
257 } else if (iphy
->protocol
== SCIC_SDS_PHY_PROTOCOL_SAS
) {
258 iphy
->sas_phy
.oob_mode
= SAS_OOB_MODE
;
259 iphy
->sas_phy
.frame_rcvd_size
= sizeof(struct sas_identify_frame
);
261 /* Copy the attached SAS address from the IAF */
262 memcpy(iphy
->sas_phy
.attached_sas_addr
,
263 iphy
->frame_rcvd
.iaf
.sas_addr
, SAS_ADDR_SIZE
);
265 dev_err(&isci_host
->pdev
->dev
, "%s: unkown target\n", __func__
);
269 iphy
->sas_phy
.phy
->negotiated_linkrate
= sci_phy_linkrate(iphy
);
271 spin_unlock_irqrestore(&iphy
->sas_phy
.frame_rcvd_lock
, flags
);
273 /* Notify libsas that we have an address frame, if indeed
274 * we've found an SSP, SMP, or STP target */
276 isci_host
->sas_ha
.notify_port_event(&iphy
->sas_phy
,
282 * isci_port_link_down() - This function is called by the sci core when a link
284 * @isci_host: This parameter specifies the isci host object.
285 * @phy: This parameter specifies the isci phy with the active link.
286 * @port: This parameter specifies the isci port with the active link.
289 static void isci_port_link_down(struct isci_host
*isci_host
,
290 struct isci_phy
*isci_phy
,
291 struct isci_port
*isci_port
)
293 struct isci_remote_device
*isci_device
;
295 dev_dbg(&isci_host
->pdev
->dev
,
296 "%s: isci_port = %p\n", __func__
, isci_port
);
300 /* check to see if this is the last phy on this port. */
301 if (isci_phy
->sas_phy
.port
&&
302 isci_phy
->sas_phy
.port
->num_phys
== 1) {
303 atomic_inc(&isci_port
->event
);
304 isci_port_bcn_enable(isci_host
, isci_port
);
306 /* change the state for all devices on this port. The
307 * next task sent to this device will be returned as
308 * SAS_TASK_UNDELIVERED, and the scsi mid layer will
311 list_for_each_entry(isci_device
,
312 &isci_port
->remote_dev_list
,
314 dev_dbg(&isci_host
->pdev
->dev
,
315 "%s: isci_device = %p\n",
316 __func__
, isci_device
);
317 set_bit(IDEV_GONE
, &isci_device
->flags
);
320 isci_port_change_state(isci_port
, isci_stopping
);
323 /* Notify libsas of the borken link, this will trigger calls to our
324 * isci_port_deformed and isci_dev_gone functions.
326 sas_phy_disconnected(&isci_phy
->sas_phy
);
327 isci_host
->sas_ha
.notify_phy_event(&isci_phy
->sas_phy
,
328 PHYE_LOSS_OF_SIGNAL
);
330 isci_phy
->isci_port
= NULL
;
332 dev_dbg(&isci_host
->pdev
->dev
,
333 "%s: isci_port = %p - Done\n", __func__
, isci_port
);
338 * isci_port_ready() - This function is called by the sci core when a link
340 * @isci_host: This parameter specifies the isci host object.
341 * @port: This parameter specifies the sci port with the active link.
344 static void isci_port_ready(struct isci_host
*isci_host
, struct isci_port
*isci_port
)
346 dev_dbg(&isci_host
->pdev
->dev
,
347 "%s: isci_port = %p\n", __func__
, isci_port
);
349 complete_all(&isci_port
->start_complete
);
350 isci_port_change_state(isci_port
, isci_ready
);
355 * isci_port_not_ready() - This function is called by the sci core when a link
356 * is not ready. All remote devices on this link will be removed if they are
357 * in the stopping state.
358 * @isci_host: This parameter specifies the isci host object.
359 * @port: This parameter specifies the sci port with the active link.
362 static void isci_port_not_ready(struct isci_host
*isci_host
, struct isci_port
*isci_port
)
364 dev_dbg(&isci_host
->pdev
->dev
,
365 "%s: isci_port = %p\n", __func__
, isci_port
);
368 static void isci_port_stop_complete(struct scic_sds_controller
*scic
,
369 struct isci_port
*iport
,
370 enum sci_status completion_status
)
372 dev_dbg(&scic_to_ihost(scic
)->pdev
->dev
, "Port stop complete\n");
376 * isci_port_hard_reset_complete() - This function is called by the sci core
377 * when the hard reset complete notification has been received.
378 * @port: This parameter specifies the sci port with the active link.
379 * @completion_status: This parameter specifies the core status for the reset
383 static void isci_port_hard_reset_complete(struct isci_port
*isci_port
,
384 enum sci_status completion_status
)
386 dev_dbg(&isci_port
->isci_host
->pdev
->dev
,
387 "%s: isci_port = %p, completion_status=%x\n",
388 __func__
, isci_port
, completion_status
);
390 /* Save the status of the hard reset from the port. */
391 isci_port
->hard_reset_status
= completion_status
;
393 complete_all(&isci_port
->hard_reset_complete
);
396 /* This method will return a true value if the specified phy can be assigned to
397 * this port The following is a list of phys for each port that are allowed: -
398 * Port 0 - 3 2 1 0 - Port 1 - 1 - Port 2 - 3 2 - Port 3 - 3 This method
399 * doesn't preclude all configurations. It merely ensures that a phy is part
400 * of the allowable set of phy identifiers for that port. For example, one
401 * could assign phy 3 to port 0 and no other phys. Please refer to
402 * scic_sds_port_is_phy_mask_valid() for information regarding whether the
403 * phy_mask for a port can be supported. bool true if this is a valid phy
404 * assignment for the port false if this is not a valid phy assignment for the
407 bool scic_sds_port_is_valid_phy_assignment(struct isci_port
*iport
,
410 /* Initialize to invalid value. */
411 u32 existing_phy_index
= SCI_MAX_PHYS
;
414 if ((iport
->physical_port_index
== 1) && (phy_index
!= 1)) {
418 if (iport
->physical_port_index
== 3 && phy_index
!= 3) {
423 (iport
->physical_port_index
== 2)
424 && ((phy_index
== 0) || (phy_index
== 1))
429 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
430 if ((iport
->phy_table
[index
] != NULL
)
431 && (index
!= phy_index
)) {
432 existing_phy_index
= index
;
437 * Ensure that all of the phys in the port are capable of
438 * operating at the same maximum link rate. */
440 (existing_phy_index
< SCI_MAX_PHYS
)
441 && (iport
->owning_controller
->user_parameters
.sds1
.phys
[
442 phy_index
].max_speed_generation
!=
443 iport
->owning_controller
->user_parameters
.sds1
.phys
[
444 existing_phy_index
].max_speed_generation
)
453 * @sci_port: This is the port object for which to determine if the phy mask
456 * This method will return a true value if the port's phy mask can be supported
457 * by the SCU. The following is a list of valid PHY mask configurations for
458 * each port: - Port 0 - [[3 2] 1] 0 - Port 1 - [1] - Port 2 - [[3] 2]
459 * - Port 3 - [3] This method returns a boolean indication specifying if the
460 * phy mask can be supported. true if this is a valid phy assignment for the
461 * port false if this is not a valid phy assignment for the port
463 static bool scic_sds_port_is_phy_mask_valid(
464 struct isci_port
*iport
,
467 if (iport
->physical_port_index
== 0) {
468 if (((phy_mask
& 0x0F) == 0x0F)
469 || ((phy_mask
& 0x03) == 0x03)
470 || ((phy_mask
& 0x01) == 0x01)
473 } else if (iport
->physical_port_index
== 1) {
474 if (((phy_mask
& 0x02) == 0x02)
477 } else if (iport
->physical_port_index
== 2) {
478 if (((phy_mask
& 0x0C) == 0x0C)
479 || ((phy_mask
& 0x04) == 0x04)
482 } else if (iport
->physical_port_index
== 3) {
483 if (((phy_mask
& 0x08) == 0x08)
492 * This method retrieves a currently active (i.e. connected) phy contained in
493 * the port. Currently, the lowest order phy that is connected is returned.
494 * This method returns a pointer to a SCIS_SDS_PHY object. NULL This value is
495 * returned if there are no currently active (i.e. connected to a remote end
496 * point) phys contained in the port. All other values specify a struct scic_sds_phy
497 * object that is active in the port.
499 static struct isci_phy
*scic_sds_port_get_a_connected_phy(struct isci_port
*iport
)
502 struct isci_phy
*iphy
;
504 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
505 /* Ensure that the phy is both part of the port and currently
506 * connected to the remote end-point.
508 iphy
= iport
->phy_table
[index
];
509 if (iphy
&& scic_sds_port_active_phy(iport
, iphy
))
516 static enum sci_status
scic_sds_port_set_phy(struct isci_port
*iport
, struct isci_phy
*iphy
)
518 /* Check to see if we can add this phy to a port
519 * that means that the phy is not part of a port and that the port does
520 * not already have a phy assinged to the phy index.
522 if (!iport
->phy_table
[iphy
->phy_index
] &&
523 !phy_get_non_dummy_port(iphy
) &&
524 scic_sds_port_is_valid_phy_assignment(iport
, iphy
->phy_index
)) {
525 /* Phy is being added in the stopped state so we are in MPC mode
526 * make logical port index = physical port index
528 iport
->logical_port_index
= iport
->physical_port_index
;
529 iport
->phy_table
[iphy
->phy_index
] = iphy
;
530 scic_sds_phy_set_port(iphy
, iport
);
538 static enum sci_status
scic_sds_port_clear_phy(struct isci_port
*iport
,
539 struct isci_phy
*iphy
)
541 /* Make sure that this phy is part of this port */
542 if (iport
->phy_table
[iphy
->phy_index
] == iphy
&&
543 phy_get_non_dummy_port(iphy
) == iport
) {
544 struct scic_sds_controller
*scic
= iport
->owning_controller
;
545 struct isci_host
*ihost
= scic_to_ihost(scic
);
547 /* Yep it is assigned to this port so remove it */
548 scic_sds_phy_set_port(iphy
, &ihost
->ports
[SCI_MAX_PORTS
]);
549 iport
->phy_table
[iphy
->phy_index
] = NULL
;
558 * This method requests the SAS address for the supplied SAS port from the SCI
560 * @sci_port: a handle corresponding to the SAS port for which to return the
562 * @sas_address: This parameter specifies a pointer to a SAS address structure
563 * into which the core will copy the SAS address for the port.
566 void scic_sds_port_get_sas_address(
567 struct isci_port
*iport
,
568 struct sci_sas_address
*sas_address
)
572 sas_address
->high
= 0;
573 sas_address
->low
= 0;
575 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
576 if (iport
->phy_table
[index
] != NULL
) {
577 scic_sds_phy_get_sas_address(iport
->phy_table
[index
], sas_address
);
583 * This function requests the SAS address for the device directly attached to
585 * @sci_port: a handle corresponding to the SAS port for which to return the
587 * @sas_address: This parameter specifies a pointer to a SAS address structure
588 * into which the core will copy the SAS address for the device directly
589 * attached to the port.
592 void scic_sds_port_get_attached_sas_address(
593 struct isci_port
*iport
,
594 struct sci_sas_address
*sas_address
)
596 struct isci_phy
*iphy
;
599 * Ensure that the phy is both part of the port and currently
600 * connected to the remote end-point.
602 iphy
= scic_sds_port_get_a_connected_phy(iport
);
604 if (iphy
->protocol
!= SCIC_SDS_PHY_PROTOCOL_SATA
) {
605 scic_sds_phy_get_attached_sas_address(iphy
,
608 scic_sds_phy_get_sas_address(iphy
, sas_address
);
609 sas_address
->low
+= iphy
->phy_index
;
612 sas_address
->high
= 0;
613 sas_address
->low
= 0;
618 * scic_sds_port_construct_dummy_rnc() - create dummy rnc for si workaround
620 * @sci_port: logical port on which we need to create the remote node context
621 * @rni: remote node index for this remote node context.
623 * This routine will construct a dummy remote node context data structure
624 * This structure will be posted to the hardware to work around a scheduler
625 * error in the hardware.
627 static void scic_sds_port_construct_dummy_rnc(struct isci_port
*iport
, u16 rni
)
629 union scu_remote_node_context
*rnc
;
631 rnc
= &iport
->owning_controller
->remote_node_context_table
[rni
];
633 memset(rnc
, 0, sizeof(union scu_remote_node_context
));
635 rnc
->ssp
.remote_sas_address_hi
= 0;
636 rnc
->ssp
.remote_sas_address_lo
= 0;
638 rnc
->ssp
.remote_node_index
= rni
;
639 rnc
->ssp
.remote_node_port_width
= 1;
640 rnc
->ssp
.logical_port_index
= iport
->physical_port_index
;
642 rnc
->ssp
.nexus_loss_timer_enable
= false;
643 rnc
->ssp
.check_bit
= false;
644 rnc
->ssp
.is_valid
= true;
645 rnc
->ssp
.is_remote_node_context
= true;
646 rnc
->ssp
.function_number
= 0;
647 rnc
->ssp
.arbitration_wait_time
= 0;
651 * construct a dummy task context data structure. This
652 * structure will be posted to the hardwre to work around a scheduler error
655 static void scic_sds_port_construct_dummy_task(struct isci_port
*iport
, u16 tag
)
657 struct scic_sds_controller
*scic
= iport
->owning_controller
;
658 struct scu_task_context
*task_context
;
660 task_context
= &scic
->task_context_table
[ISCI_TAG_TCI(tag
)];
661 memset(task_context
, 0, sizeof(struct scu_task_context
));
663 task_context
->initiator_request
= 1;
664 task_context
->connection_rate
= 1;
665 task_context
->logical_port_index
= iport
->physical_port_index
;
666 task_context
->protocol_type
= SCU_TASK_CONTEXT_PROTOCOL_SSP
;
667 task_context
->task_index
= ISCI_TAG_TCI(tag
);
668 task_context
->valid
= SCU_TASK_CONTEXT_VALID
;
669 task_context
->context_type
= SCU_TASK_CONTEXT_TYPE
;
670 task_context
->remote_node_index
= iport
->reserved_rni
;
671 task_context
->do_not_dma_ssp_good_response
= 1;
672 task_context
->task_phase
= 0x01;
675 static void scic_sds_port_destroy_dummy_resources(struct isci_port
*iport
)
677 struct scic_sds_controller
*scic
= iport
->owning_controller
;
679 if (iport
->reserved_tag
!= SCI_CONTROLLER_INVALID_IO_TAG
)
680 isci_free_tag(scic_to_ihost(scic
), iport
->reserved_tag
);
682 if (iport
->reserved_rni
!= SCU_DUMMY_INDEX
)
683 scic_sds_remote_node_table_release_remote_node_index(&scic
->available_remote_nodes
,
684 1, iport
->reserved_rni
);
686 iport
->reserved_rni
= SCU_DUMMY_INDEX
;
687 iport
->reserved_tag
= SCI_CONTROLLER_INVALID_IO_TAG
;
691 * This method performs initialization of the supplied port. Initialization
692 * includes: - state machine initialization - member variable initialization
693 * - configuring the phy_mask
695 * @transport_layer_registers:
696 * @port_task_scheduler_registers:
697 * @port_configuration_regsiter:
699 * enum sci_status SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION This value is returned
700 * if the phy being added to the port
702 enum sci_status
scic_sds_port_initialize(
703 struct isci_port
*iport
,
704 void __iomem
*port_task_scheduler_registers
,
705 void __iomem
*port_configuration_regsiter
,
706 void __iomem
*viit_registers
)
708 iport
->port_task_scheduler_registers
= port_task_scheduler_registers
;
709 iport
->port_pe_configuration_register
= port_configuration_regsiter
;
710 iport
->viit_registers
= viit_registers
;
717 * This method assigns the direct attached device ID for this port.
719 * @param[in] iport The port for which the direct attached device id is to
721 * @param[in] device_id The direct attached device ID to assign to the port.
722 * This will be the RNi for the device
724 void scic_sds_port_setup_transports(
725 struct isci_port
*iport
,
730 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
731 if (iport
->active_phy_mask
& (1 << index
))
732 scic_sds_phy_setup_transport(iport
->phy_table
[index
], device_id
);
738 * @sci_port: This is the port on which the phy should be enabled.
739 * @sci_phy: This is the specific phy which to enable.
740 * @do_notify_user: This parameter specifies whether to inform the user (via
741 * scic_cb_port_link_up()) as to the fact that a new phy as become ready.
743 * This function will activate the phy in the port.
744 * Activation includes: - adding
745 * the phy to the port - enabling the Protocol Engine in the silicon. -
746 * notifying the user that the link is up. none
748 static void scic_sds_port_activate_phy(struct isci_port
*iport
,
749 struct isci_phy
*iphy
,
752 struct scic_sds_controller
*scic
= iport
->owning_controller
;
753 struct isci_host
*ihost
= scic_to_ihost(scic
);
755 if (iphy
->protocol
!= SCIC_SDS_PHY_PROTOCOL_SATA
)
756 scic_sds_phy_resume(iphy
);
758 iport
->active_phy_mask
|= 1 << iphy
->phy_index
;
760 scic_sds_controller_clear_invalid_phy(scic
, iphy
);
762 if (do_notify_user
== true)
763 isci_port_link_up(ihost
, iport
, iphy
);
766 void scic_sds_port_deactivate_phy(struct isci_port
*iport
,
767 struct isci_phy
*iphy
,
770 struct scic_sds_controller
*scic
= scic_sds_port_get_controller(iport
);
771 struct isci_host
*ihost
= scic_to_ihost(scic
);
773 iport
->active_phy_mask
&= ~(1 << iphy
->phy_index
);
775 iphy
->max_negotiated_speed
= SAS_LINK_RATE_UNKNOWN
;
777 /* Re-assign the phy back to the LP as if it were a narrow port */
778 writel(iphy
->phy_index
,
779 &iport
->port_pe_configuration_register
[iphy
->phy_index
]);
781 if (do_notify_user
== true)
782 isci_port_link_down(ihost
, iphy
, iport
);
787 * @sci_port: This is the port on which the phy should be disabled.
788 * @sci_phy: This is the specific phy which to disabled.
790 * This function will disable the phy and report that the phy is not valid for
791 * this port object. None
793 static void scic_sds_port_invalid_link_up(struct isci_port
*iport
,
794 struct isci_phy
*iphy
)
796 struct scic_sds_controller
*scic
= iport
->owning_controller
;
799 * Check to see if we have alreay reported this link as bad and if
800 * not go ahead and tell the SCI_USER that we have discovered an
803 if ((scic
->invalid_phy_mask
& (1 << iphy
->phy_index
)) == 0) {
804 scic_sds_controller_set_invalid_phy(scic
, iphy
);
805 dev_warn(&scic_to_ihost(scic
)->pdev
->dev
, "Invalid link up!\n");
809 static bool is_port_ready_state(enum scic_sds_port_states state
)
813 case SCI_PORT_SUB_WAITING
:
814 case SCI_PORT_SUB_OPERATIONAL
:
815 case SCI_PORT_SUB_CONFIGURING
:
822 /* flag dummy rnc hanling when exiting a ready state */
823 static void port_state_machine_change(struct isci_port
*iport
,
824 enum scic_sds_port_states state
)
826 struct sci_base_state_machine
*sm
= &iport
->sm
;
827 enum scic_sds_port_states old_state
= sm
->current_state_id
;
829 if (is_port_ready_state(old_state
) && !is_port_ready_state(state
))
830 iport
->ready_exit
= true;
832 sci_change_state(sm
, state
);
833 iport
->ready_exit
= false;
837 * scic_sds_port_general_link_up_handler - phy can be assigned to port?
838 * @sci_port: scic_sds_port object for which has a phy that has gone link up.
839 * @sci_phy: This is the struct isci_phy object that has gone link up.
840 * @do_notify_user: This parameter specifies whether to inform the user (via
841 * scic_cb_port_link_up()) as to the fact that a new phy as become ready.
843 * Determine if this phy can be assigned to this
844 * port . If the phy is not a valid PHY for
845 * this port then the function will notify the user. A PHY can only be
846 * part of a port if it's attached SAS ADDRESS is the same as all other PHYs in
847 * the same port. none
849 static void scic_sds_port_general_link_up_handler(struct isci_port
*iport
,
850 struct isci_phy
*iphy
,
853 struct sci_sas_address port_sas_address
;
854 struct sci_sas_address phy_sas_address
;
856 scic_sds_port_get_attached_sas_address(iport
, &port_sas_address
);
857 scic_sds_phy_get_attached_sas_address(iphy
, &phy_sas_address
);
859 /* If the SAS address of the new phy matches the SAS address of
860 * other phys in the port OR this is the first phy in the port,
861 * then activate the phy and allow it to be used for operations
864 if ((phy_sas_address
.high
== port_sas_address
.high
&&
865 phy_sas_address
.low
== port_sas_address
.low
) ||
866 iport
->active_phy_mask
== 0) {
867 struct sci_base_state_machine
*sm
= &iport
->sm
;
869 scic_sds_port_activate_phy(iport
, iphy
, do_notify_user
);
870 if (sm
->current_state_id
== SCI_PORT_RESETTING
)
871 port_state_machine_change(iport
, SCI_PORT_READY
);
873 scic_sds_port_invalid_link_up(iport
, iphy
);
879 * This method returns false if the port only has a single phy object assigned.
880 * If there are no phys or more than one phy then the method will return
882 * @sci_port: The port for which the wide port condition is to be checked.
884 * bool true Is returned if this is a wide ported port. false Is returned if
885 * this is a narrow port.
887 static bool scic_sds_port_is_wide(struct isci_port
*iport
)
892 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
893 if (iport
->phy_table
[index
] != NULL
) {
898 return phy_count
!= 1;
902 * This method is called by the PHY object when the link is detected. if the
903 * port wants the PHY to continue on to the link up state then the port
904 * layer must return true. If the port object returns false the phy object
905 * must halt its attempt to go link up.
906 * @sci_port: The port associated with the phy object.
907 * @sci_phy: The phy object that is trying to go link up.
909 * true if the phy object can continue to the link up condition. true Is
910 * returned if this phy can continue to the ready state. false Is returned if
911 * can not continue on to the ready state. This notification is in place for
912 * wide ports and direct attached phys. Since there are no wide ported SATA
913 * devices this could become an invalid port configuration.
915 bool scic_sds_port_link_detected(
916 struct isci_port
*iport
,
917 struct isci_phy
*iphy
)
919 if ((iport
->logical_port_index
!= SCIC_SDS_DUMMY_PORT
) &&
920 (iphy
->protocol
== SCIC_SDS_PHY_PROTOCOL_SATA
) &&
921 scic_sds_port_is_wide(iport
)) {
922 scic_sds_port_invalid_link_up(iport
, iphy
);
930 static void port_timeout(unsigned long data
)
932 struct sci_timer
*tmr
= (struct sci_timer
*)data
;
933 struct isci_port
*iport
= container_of(tmr
, typeof(*iport
), timer
);
934 struct isci_host
*ihost
= scic_to_ihost(iport
->owning_controller
);
938 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
943 current_state
= iport
->sm
.current_state_id
;
945 if (current_state
== SCI_PORT_RESETTING
) {
946 /* if the port is still in the resetting state then the timeout
947 * fired before the reset completed.
949 port_state_machine_change(iport
, SCI_PORT_FAILED
);
950 } else if (current_state
== SCI_PORT_STOPPED
) {
951 /* if the port is stopped then the start request failed In this
952 * case stay in the stopped state.
954 dev_err(sciport_to_dev(iport
),
955 "%s: SCIC Port 0x%p failed to stop before tiemout.\n",
958 } else if (current_state
== SCI_PORT_STOPPING
) {
959 /* if the port is still stopping then the stop has not completed */
960 isci_port_stop_complete(iport
->owning_controller
,
962 SCI_FAILURE_TIMEOUT
);
964 /* The port is in the ready state and we have a timer
965 * reporting a timeout this should not happen.
967 dev_err(sciport_to_dev(iport
),
968 "%s: SCIC Port 0x%p is processing a timeout operation "
969 "in state %d.\n", __func__
, iport
, current_state
);
973 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
976 /* --------------------------------------------------------------------------- */
979 * This function updates the hardwares VIIT entry for this port.
983 static void scic_sds_port_update_viit_entry(struct isci_port
*iport
)
985 struct sci_sas_address sas_address
;
987 scic_sds_port_get_sas_address(iport
, &sas_address
);
989 writel(sas_address
.high
,
990 &iport
->viit_registers
->initiator_sas_address_hi
);
991 writel(sas_address
.low
,
992 &iport
->viit_registers
->initiator_sas_address_lo
);
994 /* This value get cleared just in case its not already cleared */
995 writel(0, &iport
->viit_registers
->reserved
);
997 /* We are required to update the status register last */
998 writel(SCU_VIIT_ENTRY_ID_VIIT
|
999 SCU_VIIT_IPPT_INITIATOR
|
1000 ((1 << iport
->physical_port_index
) << SCU_VIIT_ENTRY_LPVIE_SHIFT
) |
1001 SCU_VIIT_STATUS_ALL_VALID
,
1002 &iport
->viit_registers
->status
);
1005 enum sas_linkrate
scic_sds_port_get_max_allowed_speed(struct isci_port
*iport
)
1008 struct isci_phy
*iphy
;
1009 enum sas_linkrate max_allowed_speed
= SAS_LINK_RATE_6_0_GBPS
;
1012 * Loop through all of the phys in this port and find the phy with the
1013 * lowest maximum link rate. */
1014 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
1015 iphy
= iport
->phy_table
[index
];
1016 if (iphy
&& scic_sds_port_active_phy(iport
, iphy
) &&
1017 iphy
->max_negotiated_speed
< max_allowed_speed
)
1018 max_allowed_speed
= iphy
->max_negotiated_speed
;
1021 return max_allowed_speed
;
1024 static void scic_sds_port_suspend_port_task_scheduler(struct isci_port
*iport
)
1026 u32 pts_control_value
;
1028 pts_control_value
= readl(&iport
->port_task_scheduler_registers
->control
);
1029 pts_control_value
|= SCU_PTSxCR_GEN_BIT(SUSPEND
);
1030 writel(pts_control_value
, &iport
->port_task_scheduler_registers
->control
);
1034 * scic_sds_port_post_dummy_request() - post dummy/workaround request
1035 * @sci_port: port to post task
1037 * Prevent the hardware scheduler from posting new requests to the front
1038 * of the scheduler queue causing a starvation problem for currently
1042 static void scic_sds_port_post_dummy_request(struct isci_port
*iport
)
1044 struct scic_sds_controller
*scic
= iport
->owning_controller
;
1045 u16 tag
= iport
->reserved_tag
;
1046 struct scu_task_context
*tc
;
1049 tc
= &scic
->task_context_table
[ISCI_TAG_TCI(tag
)];
1052 command
= SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC
|
1053 iport
->physical_port_index
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
|
1056 scic_sds_controller_post_request(scic
, command
);
1060 * This routine will abort the dummy request. This will alow the hardware to
1061 * power down parts of the silicon to save power.
1063 * @sci_port: The port on which the task must be aborted.
1066 static void scic_sds_port_abort_dummy_request(struct isci_port
*iport
)
1068 struct scic_sds_controller
*scic
= iport
->owning_controller
;
1069 u16 tag
= iport
->reserved_tag
;
1070 struct scu_task_context
*tc
;
1073 tc
= &scic
->task_context_table
[ISCI_TAG_TCI(tag
)];
1076 command
= SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT
|
1077 iport
->physical_port_index
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
|
1080 scic_sds_controller_post_request(scic
, command
);
1085 * @sci_port: This is the struct isci_port object to resume.
1087 * This method will resume the port task scheduler for this port object. none
1090 scic_sds_port_resume_port_task_scheduler(struct isci_port
*iport
)
1092 u32 pts_control_value
;
1094 pts_control_value
= readl(&iport
->port_task_scheduler_registers
->control
);
1095 pts_control_value
&= ~SCU_PTSxCR_GEN_BIT(SUSPEND
);
1096 writel(pts_control_value
, &iport
->port_task_scheduler_registers
->control
);
1099 static void scic_sds_port_ready_substate_waiting_enter(struct sci_base_state_machine
*sm
)
1101 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1103 scic_sds_port_suspend_port_task_scheduler(iport
);
1105 iport
->not_ready_reason
= SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS
;
1107 if (iport
->active_phy_mask
!= 0) {
1108 /* At least one of the phys on the port is ready */
1109 port_state_machine_change(iport
,
1110 SCI_PORT_SUB_OPERATIONAL
);
1114 static void scic_sds_port_ready_substate_operational_enter(struct sci_base_state_machine
*sm
)
1117 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1118 struct scic_sds_controller
*scic
= iport
->owning_controller
;
1119 struct isci_host
*ihost
= scic_to_ihost(scic
);
1121 isci_port_ready(ihost
, iport
);
1123 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
1124 if (iport
->phy_table
[index
]) {
1125 writel(iport
->physical_port_index
,
1126 &iport
->port_pe_configuration_register
[
1127 iport
->phy_table
[index
]->phy_index
]);
1131 scic_sds_port_update_viit_entry(iport
);
1133 scic_sds_port_resume_port_task_scheduler(iport
);
1136 * Post the dummy task for the port so the hardware can schedule
1139 scic_sds_port_post_dummy_request(iport
);
1142 static void scic_sds_port_invalidate_dummy_remote_node(struct isci_port
*iport
)
1144 struct scic_sds_controller
*scic
= iport
->owning_controller
;
1145 u8 phys_index
= iport
->physical_port_index
;
1146 union scu_remote_node_context
*rnc
;
1147 u16 rni
= iport
->reserved_rni
;
1150 rnc
= &scic
->remote_node_context_table
[rni
];
1152 rnc
->ssp
.is_valid
= false;
1154 /* ensure the preceding tc abort request has reached the
1155 * controller and give it ample time to act before posting the rnc
1158 readl(&scic
->smu_registers
->interrupt_status
); /* flush */
1161 command
= SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE
|
1162 phys_index
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
| rni
;
1164 scic_sds_controller_post_request(scic
, command
);
1169 * @object: This is the object which is cast to a struct isci_port object.
1171 * This method will perform the actions required by the struct isci_port on
1172 * exiting the SCI_PORT_SUB_OPERATIONAL. This function reports
1173 * the port not ready and suspends the port task scheduler. none
1175 static void scic_sds_port_ready_substate_operational_exit(struct sci_base_state_machine
*sm
)
1177 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1178 struct scic_sds_controller
*scic
= iport
->owning_controller
;
1179 struct isci_host
*ihost
= scic_to_ihost(scic
);
1182 * Kill the dummy task for this port if it has not yet posted
1183 * the hardware will treat this as a NOP and just return abort
1186 scic_sds_port_abort_dummy_request(iport
);
1188 isci_port_not_ready(ihost
, iport
);
1190 if (iport
->ready_exit
)
1191 scic_sds_port_invalidate_dummy_remote_node(iport
);
1194 static void scic_sds_port_ready_substate_configuring_enter(struct sci_base_state_machine
*sm
)
1196 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1197 struct scic_sds_controller
*scic
= iport
->owning_controller
;
1198 struct isci_host
*ihost
= scic_to_ihost(scic
);
1200 if (iport
->active_phy_mask
== 0) {
1201 isci_port_not_ready(ihost
, iport
);
1203 port_state_machine_change(iport
,
1204 SCI_PORT_SUB_WAITING
);
1205 } else if (iport
->started_request_count
== 0)
1206 port_state_machine_change(iport
,
1207 SCI_PORT_SUB_OPERATIONAL
);
1210 static void scic_sds_port_ready_substate_configuring_exit(struct sci_base_state_machine
*sm
)
1212 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1214 scic_sds_port_suspend_port_task_scheduler(iport
);
1215 if (iport
->ready_exit
)
1216 scic_sds_port_invalidate_dummy_remote_node(iport
);
1219 enum sci_status
scic_sds_port_start(struct isci_port
*iport
)
1221 struct scic_sds_controller
*scic
= iport
->owning_controller
;
1222 enum sci_status status
= SCI_SUCCESS
;
1223 enum scic_sds_port_states state
;
1226 state
= iport
->sm
.current_state_id
;
1227 if (state
!= SCI_PORT_STOPPED
) {
1228 dev_warn(sciport_to_dev(iport
),
1229 "%s: in wrong state: %d\n", __func__
, state
);
1230 return SCI_FAILURE_INVALID_STATE
;
1233 if (iport
->assigned_device_count
> 0) {
1234 /* TODO This is a start failure operation because
1235 * there are still devices assigned to this port.
1236 * There must be no devices assigned to a port on a
1239 return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION
;
1242 if (iport
->reserved_rni
== SCU_DUMMY_INDEX
) {
1243 u16 rni
= scic_sds_remote_node_table_allocate_remote_node(
1244 &scic
->available_remote_nodes
, 1);
1246 if (rni
!= SCU_DUMMY_INDEX
)
1247 scic_sds_port_construct_dummy_rnc(iport
, rni
);
1249 status
= SCI_FAILURE_INSUFFICIENT_RESOURCES
;
1250 iport
->reserved_rni
= rni
;
1253 if (iport
->reserved_tag
== SCI_CONTROLLER_INVALID_IO_TAG
) {
1254 struct isci_host
*ihost
= scic_to_ihost(scic
);
1257 tag
= isci_alloc_tag(ihost
);
1258 if (tag
== SCI_CONTROLLER_INVALID_IO_TAG
)
1259 status
= SCI_FAILURE_INSUFFICIENT_RESOURCES
;
1261 scic_sds_port_construct_dummy_task(iport
, tag
);
1262 iport
->reserved_tag
= tag
;
1265 if (status
== SCI_SUCCESS
) {
1266 phy_mask
= scic_sds_port_get_phys(iport
);
1269 * There are one or more phys assigned to this port. Make sure
1270 * the port's phy mask is in fact legal and supported by the
1273 if (scic_sds_port_is_phy_mask_valid(iport
, phy_mask
) == true) {
1274 port_state_machine_change(iport
,
1279 status
= SCI_FAILURE
;
1282 if (status
!= SCI_SUCCESS
)
1283 scic_sds_port_destroy_dummy_resources(iport
);
1288 enum sci_status
scic_sds_port_stop(struct isci_port
*iport
)
1290 enum scic_sds_port_states state
;
1292 state
= iport
->sm
.current_state_id
;
1294 case SCI_PORT_STOPPED
:
1296 case SCI_PORT_SUB_WAITING
:
1297 case SCI_PORT_SUB_OPERATIONAL
:
1298 case SCI_PORT_SUB_CONFIGURING
:
1299 case SCI_PORT_RESETTING
:
1300 port_state_machine_change(iport
,
1304 dev_warn(sciport_to_dev(iport
),
1305 "%s: in wrong state: %d\n", __func__
, state
);
1306 return SCI_FAILURE_INVALID_STATE
;
1310 static enum sci_status
scic_port_hard_reset(struct isci_port
*iport
, u32 timeout
)
1312 enum sci_status status
= SCI_FAILURE_INVALID_PHY
;
1313 struct isci_phy
*iphy
= NULL
;
1314 enum scic_sds_port_states state
;
1317 state
= iport
->sm
.current_state_id
;
1318 if (state
!= SCI_PORT_SUB_OPERATIONAL
) {
1319 dev_warn(sciport_to_dev(iport
),
1320 "%s: in wrong state: %d\n", __func__
, state
);
1321 return SCI_FAILURE_INVALID_STATE
;
1324 /* Select a phy on which we can send the hard reset request. */
1325 for (phy_index
= 0; phy_index
< SCI_MAX_PHYS
&& !iphy
; phy_index
++) {
1326 iphy
= iport
->phy_table
[phy_index
];
1327 if (iphy
&& !scic_sds_port_active_phy(iport
, iphy
)) {
1329 * We found a phy but it is not ready select
1336 /* If we have a phy then go ahead and start the reset procedure */
1339 status
= scic_sds_phy_reset(iphy
);
1341 if (status
!= SCI_SUCCESS
)
1344 sci_mod_timer(&iport
->timer
, timeout
);
1345 iport
->not_ready_reason
= SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED
;
1347 port_state_machine_change(iport
, SCI_PORT_RESETTING
);
1352 * scic_sds_port_add_phy() -
1353 * @sci_port: This parameter specifies the port in which the phy will be added.
1354 * @sci_phy: This parameter is the phy which is to be added to the port.
1356 * This method will add a PHY to the selected port. This method returns an
1357 * enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other
1358 * status is a failure to add the phy to the port.
1360 enum sci_status
scic_sds_port_add_phy(struct isci_port
*iport
,
1361 struct isci_phy
*iphy
)
1363 enum sci_status status
;
1364 enum scic_sds_port_states state
;
1366 state
= iport
->sm
.current_state_id
;
1368 case SCI_PORT_STOPPED
: {
1369 struct sci_sas_address port_sas_address
;
1371 /* Read the port assigned SAS Address if there is one */
1372 scic_sds_port_get_sas_address(iport
, &port_sas_address
);
1374 if (port_sas_address
.high
!= 0 && port_sas_address
.low
!= 0) {
1375 struct sci_sas_address phy_sas_address
;
1377 /* Make sure that the PHY SAS Address matches the SAS Address
1380 scic_sds_phy_get_sas_address(iphy
, &phy_sas_address
);
1382 if (port_sas_address
.high
!= phy_sas_address
.high
||
1383 port_sas_address
.low
!= phy_sas_address
.low
)
1384 return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION
;
1386 return scic_sds_port_set_phy(iport
, iphy
);
1388 case SCI_PORT_SUB_WAITING
:
1389 case SCI_PORT_SUB_OPERATIONAL
:
1390 status
= scic_sds_port_set_phy(iport
, iphy
);
1392 if (status
!= SCI_SUCCESS
)
1395 scic_sds_port_general_link_up_handler(iport
, iphy
, true);
1396 iport
->not_ready_reason
= SCIC_PORT_NOT_READY_RECONFIGURING
;
1397 port_state_machine_change(iport
, SCI_PORT_SUB_CONFIGURING
);
1400 case SCI_PORT_SUB_CONFIGURING
:
1401 status
= scic_sds_port_set_phy(iport
, iphy
);
1403 if (status
!= SCI_SUCCESS
)
1405 scic_sds_port_general_link_up_handler(iport
, iphy
, true);
1407 /* Re-enter the configuring state since this may be the last phy in
1410 port_state_machine_change(iport
,
1411 SCI_PORT_SUB_CONFIGURING
);
1414 dev_warn(sciport_to_dev(iport
),
1415 "%s: in wrong state: %d\n", __func__
, state
);
1416 return SCI_FAILURE_INVALID_STATE
;
1421 * scic_sds_port_remove_phy() -
1422 * @sci_port: This parameter specifies the port in which the phy will be added.
1423 * @sci_phy: This parameter is the phy which is to be added to the port.
1425 * This method will remove the PHY from the selected PORT. This method returns
1426 * an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any
1427 * other status is a failure to add the phy to the port.
1429 enum sci_status
scic_sds_port_remove_phy(struct isci_port
*iport
,
1430 struct isci_phy
*iphy
)
1432 enum sci_status status
;
1433 enum scic_sds_port_states state
;
1435 state
= iport
->sm
.current_state_id
;
1438 case SCI_PORT_STOPPED
:
1439 return scic_sds_port_clear_phy(iport
, iphy
);
1440 case SCI_PORT_SUB_OPERATIONAL
:
1441 status
= scic_sds_port_clear_phy(iport
, iphy
);
1442 if (status
!= SCI_SUCCESS
)
1445 scic_sds_port_deactivate_phy(iport
, iphy
, true);
1446 iport
->not_ready_reason
= SCIC_PORT_NOT_READY_RECONFIGURING
;
1447 port_state_machine_change(iport
,
1448 SCI_PORT_SUB_CONFIGURING
);
1450 case SCI_PORT_SUB_CONFIGURING
:
1451 status
= scic_sds_port_clear_phy(iport
, iphy
);
1453 if (status
!= SCI_SUCCESS
)
1455 scic_sds_port_deactivate_phy(iport
, iphy
, true);
1457 /* Re-enter the configuring state since this may be the last phy in
1460 port_state_machine_change(iport
,
1461 SCI_PORT_SUB_CONFIGURING
);
1464 dev_warn(sciport_to_dev(iport
),
1465 "%s: in wrong state: %d\n", __func__
, state
);
1466 return SCI_FAILURE_INVALID_STATE
;
1470 enum sci_status
scic_sds_port_link_up(struct isci_port
*iport
,
1471 struct isci_phy
*iphy
)
1473 enum scic_sds_port_states state
;
1475 state
= iport
->sm
.current_state_id
;
1477 case SCI_PORT_SUB_WAITING
:
1478 /* Since this is the first phy going link up for the port we
1479 * can just enable it and continue
1481 scic_sds_port_activate_phy(iport
, iphy
, true);
1483 port_state_machine_change(iport
,
1484 SCI_PORT_SUB_OPERATIONAL
);
1486 case SCI_PORT_SUB_OPERATIONAL
:
1487 scic_sds_port_general_link_up_handler(iport
, iphy
, true);
1489 case SCI_PORT_RESETTING
:
1490 /* TODO We should make sure that the phy that has gone
1491 * link up is the same one on which we sent the reset. It is
1492 * possible that the phy on which we sent the reset is not the
1493 * one that has gone link up and we want to make sure that
1494 * phy being reset comes back. Consider the case where a
1495 * reset is sent but before the hardware processes the reset it
1496 * get a link up on the port because of a hot plug event.
1497 * because of the reset request this phy will go link down
1498 * almost immediately.
1501 /* In the resetting state we don't notify the user regarding
1502 * link up and link down notifications.
1504 scic_sds_port_general_link_up_handler(iport
, iphy
, false);
1507 dev_warn(sciport_to_dev(iport
),
1508 "%s: in wrong state: %d\n", __func__
, state
);
1509 return SCI_FAILURE_INVALID_STATE
;
1513 enum sci_status
scic_sds_port_link_down(struct isci_port
*iport
,
1514 struct isci_phy
*iphy
)
1516 enum scic_sds_port_states state
;
1518 state
= iport
->sm
.current_state_id
;
1520 case SCI_PORT_SUB_OPERATIONAL
:
1521 scic_sds_port_deactivate_phy(iport
, iphy
, true);
1523 /* If there are no active phys left in the port, then
1524 * transition the port to the WAITING state until such time
1525 * as a phy goes link up
1527 if (iport
->active_phy_mask
== 0)
1528 port_state_machine_change(iport
,
1529 SCI_PORT_SUB_WAITING
);
1531 case SCI_PORT_RESETTING
:
1532 /* In the resetting state we don't notify the user regarding
1533 * link up and link down notifications. */
1534 scic_sds_port_deactivate_phy(iport
, iphy
, false);
1537 dev_warn(sciport_to_dev(iport
),
1538 "%s: in wrong state: %d\n", __func__
, state
);
1539 return SCI_FAILURE_INVALID_STATE
;
1543 enum sci_status
scic_sds_port_start_io(struct isci_port
*iport
,
1544 struct scic_sds_remote_device
*sci_dev
,
1545 struct isci_request
*ireq
)
1547 enum scic_sds_port_states state
;
1549 state
= iport
->sm
.current_state_id
;
1551 case SCI_PORT_SUB_WAITING
:
1552 return SCI_FAILURE_INVALID_STATE
;
1553 case SCI_PORT_SUB_OPERATIONAL
:
1554 iport
->started_request_count
++;
1557 dev_warn(sciport_to_dev(iport
),
1558 "%s: in wrong state: %d\n", __func__
, state
);
1559 return SCI_FAILURE_INVALID_STATE
;
1563 enum sci_status
scic_sds_port_complete_io(struct isci_port
*iport
,
1564 struct scic_sds_remote_device
*sci_dev
,
1565 struct isci_request
*ireq
)
1567 enum scic_sds_port_states state
;
1569 state
= iport
->sm
.current_state_id
;
1571 case SCI_PORT_STOPPED
:
1572 dev_warn(sciport_to_dev(iport
),
1573 "%s: in wrong state: %d\n", __func__
, state
);
1574 return SCI_FAILURE_INVALID_STATE
;
1575 case SCI_PORT_STOPPING
:
1576 scic_sds_port_decrement_request_count(iport
);
1578 if (iport
->started_request_count
== 0)
1579 port_state_machine_change(iport
,
1582 case SCI_PORT_READY
:
1583 case SCI_PORT_RESETTING
:
1584 case SCI_PORT_FAILED
:
1585 case SCI_PORT_SUB_WAITING
:
1586 case SCI_PORT_SUB_OPERATIONAL
:
1587 scic_sds_port_decrement_request_count(iport
);
1589 case SCI_PORT_SUB_CONFIGURING
:
1590 scic_sds_port_decrement_request_count(iport
);
1591 if (iport
->started_request_count
== 0) {
1592 port_state_machine_change(iport
,
1593 SCI_PORT_SUB_OPERATIONAL
);
1602 * @sci_port: This is the port object which to suspend.
1604 * This method will enable the SCU Port Task Scheduler for this port object but
1605 * will leave the port task scheduler in a suspended state. none
1608 scic_sds_port_enable_port_task_scheduler(struct isci_port
*iport
)
1610 u32 pts_control_value
;
1612 pts_control_value
= readl(&iport
->port_task_scheduler_registers
->control
);
1613 pts_control_value
|= SCU_PTSxCR_GEN_BIT(ENABLE
) | SCU_PTSxCR_GEN_BIT(SUSPEND
);
1614 writel(pts_control_value
, &iport
->port_task_scheduler_registers
->control
);
1619 * @sci_port: This is the port object which to resume.
1621 * This method will disable the SCU port task scheduler for this port object.
1625 scic_sds_port_disable_port_task_scheduler(struct isci_port
*iport
)
1627 u32 pts_control_value
;
1629 pts_control_value
= readl(&iport
->port_task_scheduler_registers
->control
);
1630 pts_control_value
&=
1631 ~(SCU_PTSxCR_GEN_BIT(ENABLE
) | SCU_PTSxCR_GEN_BIT(SUSPEND
));
1632 writel(pts_control_value
, &iport
->port_task_scheduler_registers
->control
);
1635 static void scic_sds_port_post_dummy_remote_node(struct isci_port
*iport
)
1637 struct scic_sds_controller
*scic
= iport
->owning_controller
;
1638 u8 phys_index
= iport
->physical_port_index
;
1639 union scu_remote_node_context
*rnc
;
1640 u16 rni
= iport
->reserved_rni
;
1643 rnc
= &scic
->remote_node_context_table
[rni
];
1644 rnc
->ssp
.is_valid
= true;
1646 command
= SCU_CONTEXT_COMMAND_POST_RNC_32
|
1647 phys_index
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
| rni
;
1649 scic_sds_controller_post_request(scic
, command
);
1651 /* ensure hardware has seen the post rnc command and give it
1652 * ample time to act before sending the suspend
1654 readl(&scic
->smu_registers
->interrupt_status
); /* flush */
1657 command
= SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX
|
1658 phys_index
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
| rni
;
1660 scic_sds_controller_post_request(scic
, command
);
1663 static void scic_sds_port_stopped_state_enter(struct sci_base_state_machine
*sm
)
1665 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1667 if (iport
->sm
.previous_state_id
== SCI_PORT_STOPPING
) {
1669 * If we enter this state becasuse of a request to stop
1670 * the port then we want to disable the hardwares port
1671 * task scheduler. */
1672 scic_sds_port_disable_port_task_scheduler(iport
);
1676 static void scic_sds_port_stopped_state_exit(struct sci_base_state_machine
*sm
)
1678 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1680 /* Enable and suspend the port task scheduler */
1681 scic_sds_port_enable_port_task_scheduler(iport
);
1684 static void scic_sds_port_ready_state_enter(struct sci_base_state_machine
*sm
)
1686 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1687 struct scic_sds_controller
*scic
= iport
->owning_controller
;
1688 struct isci_host
*ihost
= scic_to_ihost(scic
);
1691 prev_state
= iport
->sm
.previous_state_id
;
1692 if (prev_state
== SCI_PORT_RESETTING
)
1693 isci_port_hard_reset_complete(iport
, SCI_SUCCESS
);
1695 isci_port_not_ready(ihost
, iport
);
1697 /* Post and suspend the dummy remote node context for this port. */
1698 scic_sds_port_post_dummy_remote_node(iport
);
1700 /* Start the ready substate machine */
1701 port_state_machine_change(iport
,
1702 SCI_PORT_SUB_WAITING
);
1705 static void scic_sds_port_resetting_state_exit(struct sci_base_state_machine
*sm
)
1707 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1709 sci_del_timer(&iport
->timer
);
1712 static void scic_sds_port_stopping_state_exit(struct sci_base_state_machine
*sm
)
1714 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1716 sci_del_timer(&iport
->timer
);
1718 scic_sds_port_destroy_dummy_resources(iport
);
1721 static void scic_sds_port_failed_state_enter(struct sci_base_state_machine
*sm
)
1723 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1725 isci_port_hard_reset_complete(iport
, SCI_FAILURE_TIMEOUT
);
1728 /* --------------------------------------------------------------------------- */
1730 static const struct sci_base_state scic_sds_port_state_table
[] = {
1731 [SCI_PORT_STOPPED
] = {
1732 .enter_state
= scic_sds_port_stopped_state_enter
,
1733 .exit_state
= scic_sds_port_stopped_state_exit
1735 [SCI_PORT_STOPPING
] = {
1736 .exit_state
= scic_sds_port_stopping_state_exit
1738 [SCI_PORT_READY
] = {
1739 .enter_state
= scic_sds_port_ready_state_enter
,
1741 [SCI_PORT_SUB_WAITING
] = {
1742 .enter_state
= scic_sds_port_ready_substate_waiting_enter
,
1744 [SCI_PORT_SUB_OPERATIONAL
] = {
1745 .enter_state
= scic_sds_port_ready_substate_operational_enter
,
1746 .exit_state
= scic_sds_port_ready_substate_operational_exit
1748 [SCI_PORT_SUB_CONFIGURING
] = {
1749 .enter_state
= scic_sds_port_ready_substate_configuring_enter
,
1750 .exit_state
= scic_sds_port_ready_substate_configuring_exit
1752 [SCI_PORT_RESETTING
] = {
1753 .exit_state
= scic_sds_port_resetting_state_exit
1755 [SCI_PORT_FAILED
] = {
1756 .enter_state
= scic_sds_port_failed_state_enter
,
1760 void scic_sds_port_construct(struct isci_port
*iport
, u8 index
,
1761 struct scic_sds_controller
*scic
)
1763 sci_init_sm(&iport
->sm
, scic_sds_port_state_table
, SCI_PORT_STOPPED
);
1765 iport
->logical_port_index
= SCIC_SDS_DUMMY_PORT
;
1766 iport
->physical_port_index
= index
;
1767 iport
->active_phy_mask
= 0;
1768 iport
->ready_exit
= false;
1770 iport
->owning_controller
= scic
;
1772 iport
->started_request_count
= 0;
1773 iport
->assigned_device_count
= 0;
1775 iport
->reserved_rni
= SCU_DUMMY_INDEX
;
1776 iport
->reserved_tag
= SCI_CONTROLLER_INVALID_IO_TAG
;
1778 sci_init_timer(&iport
->timer
, port_timeout
);
1780 iport
->port_task_scheduler_registers
= NULL
;
1782 for (index
= 0; index
< SCI_MAX_PHYS
; index
++)
1783 iport
->phy_table
[index
] = NULL
;
1786 void isci_port_init(struct isci_port
*iport
, struct isci_host
*ihost
, int index
)
1788 INIT_LIST_HEAD(&iport
->remote_dev_list
);
1789 INIT_LIST_HEAD(&iport
->domain_dev_list
);
1790 spin_lock_init(&iport
->state_lock
);
1791 init_completion(&iport
->start_complete
);
1792 iport
->isci_host
= ihost
;
1793 isci_port_change_state(iport
, isci_freed
);
1794 atomic_set(&iport
->event
, 0);
1798 * isci_port_get_state() - This function gets the status of the port object.
1799 * @isci_port: This parameter points to the isci_port object
1801 * status of the object as a isci_status enum.
1803 enum isci_status
isci_port_get_state(
1804 struct isci_port
*isci_port
)
1806 return isci_port
->status
;
1809 void scic_sds_port_broadcast_change_received(
1810 struct isci_port
*iport
,
1811 struct isci_phy
*iphy
)
1813 struct scic_sds_controller
*scic
= iport
->owning_controller
;
1814 struct isci_host
*ihost
= scic_to_ihost(scic
);
1816 /* notify the user. */
1817 isci_port_bc_change_received(ihost
, iport
, iphy
);
1820 int isci_port_perform_hard_reset(struct isci_host
*ihost
, struct isci_port
*iport
,
1821 struct isci_phy
*iphy
)
1823 unsigned long flags
;
1824 enum sci_status status
;
1825 int idx
, ret
= TMF_RESP_FUNC_COMPLETE
;
1827 dev_dbg(&ihost
->pdev
->dev
, "%s: iport = %p\n",
1830 init_completion(&iport
->hard_reset_complete
);
1832 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
1834 #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
1835 status
= scic_port_hard_reset(iport
, ISCI_PORT_RESET_TIMEOUT
);
1837 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
1839 if (status
== SCI_SUCCESS
) {
1840 wait_for_completion(&iport
->hard_reset_complete
);
1842 dev_dbg(&ihost
->pdev
->dev
,
1843 "%s: iport = %p; hard reset completion\n",
1846 if (iport
->hard_reset_status
!= SCI_SUCCESS
)
1847 ret
= TMF_RESP_FUNC_FAILED
;
1849 ret
= TMF_RESP_FUNC_FAILED
;
1851 dev_err(&ihost
->pdev
->dev
,
1852 "%s: iport = %p; scic_port_hard_reset call"
1854 __func__
, iport
, status
);
1858 /* If the hard reset for the port has failed, consider this
1859 * the same as link failures on all phys in the port.
1861 if (ret
!= TMF_RESP_FUNC_COMPLETE
) {
1863 dev_err(&ihost
->pdev
->dev
,
1864 "%s: iport = %p; hard reset failed "
1865 "(0x%x) - driving explicit link fail for all phys\n",
1866 __func__
, iport
, iport
->hard_reset_status
);
1868 /* Down all phys in the port. */
1869 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
1870 for (idx
= 0; idx
< SCI_MAX_PHYS
; ++idx
) {
1871 struct isci_phy
*iphy
= iport
->phy_table
[idx
];
1875 scic_sds_phy_stop(iphy
);
1876 scic_sds_phy_start(iphy
);
1878 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
1884 * isci_port_deformed() - This function is called by libsas when a port becomes
1886 * @phy: This parameter specifies the libsas phy with the inactive port.
1889 void isci_port_deformed(struct asd_sas_phy
*phy
)
1891 pr_debug("%s: sas_phy = %p\n", __func__
, phy
);
1895 * isci_port_formed() - This function is called by libsas when a port becomes
1897 * @phy: This parameter specifies the libsas phy with the active port.
1900 void isci_port_formed(struct asd_sas_phy
*phy
)
1902 pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__
, phy
, phy
->port
);