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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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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 scic_sds_port
*sci_port
,
87 struct scic_phy_proto
*protocols
)
93 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
94 if (sci_port
->phy_table
[index
] != NULL
) {
95 scic_sds_phy_get_protocols(sci_port
->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 scic_sds_port
*sci_port
)
117 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
118 if (sci_port
->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 scic_sds_port
*port
,
140 struct scic_port_properties
*prop
)
142 if ((port
== NULL
) ||
143 (port
->logical_port_index
== SCIC_SDS_DUMMY_PORT
))
144 return SCI_FAILURE_INVALID_PORT
;
146 prop
->index
= port
->logical_port_index
;
147 prop
->phy_mask
= scic_sds_port_get_phys(port
);
148 scic_sds_port_get_sas_address(port
, &prop
->local
.sas_address
);
149 scic_sds_port_get_protocols(port
, &prop
->local
.protocols
);
150 scic_sds_port_get_attached_sas_address(port
, &prop
->remote
.sas_address
);
155 static void scic_port_bcn_enable(struct scic_sds_port
*sci_port
)
157 struct scic_sds_phy
*sci_phy
;
161 for (i
= 0; i
< ARRAY_SIZE(sci_port
->phy_table
); i
++) {
162 sci_phy
= sci_port
->phy_table
[i
];
165 val
= readl(&sci_phy
->link_layer_registers
->link_layer_control
);
166 /* clear the bit by writing 1. */
167 writel(val
, &sci_phy
->link_layer_registers
->link_layer_control
);
171 /* called under scic_lock to stabilize phy:port associations */
172 void isci_port_bcn_enable(struct isci_host
*ihost
, struct isci_port
*iport
)
176 clear_bit(IPORT_BCN_BLOCKED
, &iport
->flags
);
177 wake_up(&ihost
->eventq
);
179 if (!test_and_clear_bit(IPORT_BCN_PENDING
, &iport
->flags
))
182 for (i
= 0; i
< ARRAY_SIZE(iport
->sci
.phy_table
); i
++) {
183 struct scic_sds_phy
*sci_phy
= iport
->sci
.phy_table
[i
];
184 struct isci_phy
*iphy
= sci_phy_to_iphy(sci_phy
);
189 ihost
->sas_ha
.notify_port_event(&iphy
->sas_phy
,
190 PORTE_BROADCAST_RCVD
);
195 void isci_port_bc_change_received(struct isci_host
*ihost
,
196 struct scic_sds_port
*sci_port
,
197 struct scic_sds_phy
*sci_phy
)
199 struct isci_phy
*iphy
= sci_phy_to_iphy(sci_phy
);
200 struct isci_port
*iport
= iphy
->isci_port
;
202 if (iport
&& test_bit(IPORT_BCN_BLOCKED
, &iport
->flags
)) {
203 dev_dbg(&ihost
->pdev
->dev
,
204 "%s: disabled BCN; isci_phy = %p, sas_phy = %p\n",
205 __func__
, iphy
, &iphy
->sas_phy
);
206 set_bit(IPORT_BCN_PENDING
, &iport
->flags
);
207 atomic_inc(&iport
->event
);
208 wake_up(&ihost
->eventq
);
210 dev_dbg(&ihost
->pdev
->dev
,
211 "%s: isci_phy = %p, sas_phy = %p\n",
212 __func__
, iphy
, &iphy
->sas_phy
);
214 ihost
->sas_ha
.notify_port_event(&iphy
->sas_phy
,
215 PORTE_BROADCAST_RCVD
);
217 scic_port_bcn_enable(sci_port
);
220 static void isci_port_link_up(struct isci_host
*isci_host
,
221 struct scic_sds_port
*port
,
222 struct scic_sds_phy
*phy
)
225 struct scic_port_properties properties
;
226 struct isci_phy
*isci_phy
= sci_phy_to_iphy(phy
);
227 struct isci_port
*isci_port
= sci_port_to_iport(port
);
228 unsigned long success
= true;
230 BUG_ON(isci_phy
->isci_port
!= NULL
);
232 isci_phy
->isci_port
= isci_port
;
234 dev_dbg(&isci_host
->pdev
->dev
,
235 "%s: isci_port = %p\n",
236 __func__
, isci_port
);
238 spin_lock_irqsave(&isci_phy
->sas_phy
.frame_rcvd_lock
, flags
);
240 isci_port_change_state(isci_phy
->isci_port
, isci_starting
);
242 scic_port_get_properties(port
, &properties
);
244 if (phy
->protocol
== SCIC_SDS_PHY_PROTOCOL_SATA
) {
245 u64 attached_sas_address
;
247 isci_phy
->sas_phy
.oob_mode
= SATA_OOB_MODE
;
248 isci_phy
->sas_phy
.frame_rcvd_size
= sizeof(struct dev_to_host_fis
);
251 * For direct-attached SATA devices, the SCI core will
252 * automagically assign a SAS address to the end device
253 * for the purpose of creating a port. This SAS address
254 * will not be the same as assigned to the PHY and needs
255 * to be obtained from struct scic_port_properties properties.
257 attached_sas_address
= properties
.remote
.sas_address
.high
;
258 attached_sas_address
<<= 32;
259 attached_sas_address
|= properties
.remote
.sas_address
.low
;
260 swab64s(&attached_sas_address
);
262 memcpy(&isci_phy
->sas_phy
.attached_sas_addr
,
263 &attached_sas_address
, sizeof(attached_sas_address
));
264 } else if (phy
->protocol
== SCIC_SDS_PHY_PROTOCOL_SAS
) {
265 isci_phy
->sas_phy
.oob_mode
= SAS_OOB_MODE
;
266 isci_phy
->sas_phy
.frame_rcvd_size
= sizeof(struct sas_identify_frame
);
268 /* Copy the attached SAS address from the IAF */
269 memcpy(isci_phy
->sas_phy
.attached_sas_addr
,
270 isci_phy
->frame_rcvd
.iaf
.sas_addr
, SAS_ADDR_SIZE
);
272 dev_err(&isci_host
->pdev
->dev
, "%s: unkown target\n", __func__
);
276 isci_phy
->sas_phy
.phy
->negotiated_linkrate
= sci_phy_linkrate(phy
);
278 spin_unlock_irqrestore(&isci_phy
->sas_phy
.frame_rcvd_lock
, flags
);
280 /* Notify libsas that we have an address frame, if indeed
281 * we've found an SSP, SMP, or STP target */
283 isci_host
->sas_ha
.notify_port_event(&isci_phy
->sas_phy
,
289 * isci_port_link_down() - This function is called by the sci core when a link
291 * @isci_host: This parameter specifies the isci host object.
292 * @phy: This parameter specifies the isci phy with the active link.
293 * @port: This parameter specifies the isci port with the active link.
296 static void isci_port_link_down(struct isci_host
*isci_host
,
297 struct isci_phy
*isci_phy
,
298 struct isci_port
*isci_port
)
300 struct isci_remote_device
*isci_device
;
302 dev_dbg(&isci_host
->pdev
->dev
,
303 "%s: isci_port = %p\n", __func__
, isci_port
);
307 /* check to see if this is the last phy on this port. */
308 if (isci_phy
->sas_phy
.port
&&
309 isci_phy
->sas_phy
.port
->num_phys
== 1) {
310 atomic_inc(&isci_port
->event
);
311 isci_port_bcn_enable(isci_host
, isci_port
);
313 /* change the state for all devices on this port. The
314 * next task sent to this device will be returned as
315 * SAS_TASK_UNDELIVERED, and the scsi mid layer will
318 list_for_each_entry(isci_device
,
319 &isci_port
->remote_dev_list
,
321 dev_dbg(&isci_host
->pdev
->dev
,
322 "%s: isci_device = %p\n",
323 __func__
, isci_device
);
324 isci_remote_device_change_state(isci_device
,
328 isci_port_change_state(isci_port
, isci_stopping
);
331 /* Notify libsas of the borken link, this will trigger calls to our
332 * isci_port_deformed and isci_dev_gone functions.
334 sas_phy_disconnected(&isci_phy
->sas_phy
);
335 isci_host
->sas_ha
.notify_phy_event(&isci_phy
->sas_phy
,
336 PHYE_LOSS_OF_SIGNAL
);
338 isci_phy
->isci_port
= NULL
;
340 dev_dbg(&isci_host
->pdev
->dev
,
341 "%s: isci_port = %p - Done\n", __func__
, isci_port
);
346 * isci_port_ready() - This function is called by the sci core when a link
348 * @isci_host: This parameter specifies the isci host object.
349 * @port: This parameter specifies the sci port with the active link.
352 static void isci_port_ready(struct isci_host
*isci_host
, struct isci_port
*isci_port
)
354 dev_dbg(&isci_host
->pdev
->dev
,
355 "%s: isci_port = %p\n", __func__
, isci_port
);
357 complete_all(&isci_port
->start_complete
);
358 isci_port_change_state(isci_port
, isci_ready
);
363 * isci_port_not_ready() - This function is called by the sci core when a link
364 * is not ready. All remote devices on this link will be removed if they are
365 * in the stopping state.
366 * @isci_host: This parameter specifies the isci host object.
367 * @port: This parameter specifies the sci port with the active link.
370 static void isci_port_not_ready(struct isci_host
*isci_host
, struct isci_port
*isci_port
)
372 dev_dbg(&isci_host
->pdev
->dev
,
373 "%s: isci_port = %p\n", __func__
, isci_port
);
376 static void isci_port_stop_complete(struct scic_sds_controller
*scic
,
377 struct scic_sds_port
*sci_port
,
378 enum sci_status completion_status
)
380 dev_dbg(&scic_to_ihost(scic
)->pdev
->dev
, "Port stop complete\n");
384 * isci_port_hard_reset_complete() - This function is called by the sci core
385 * when the hard reset complete notification has been received.
386 * @port: This parameter specifies the sci port with the active link.
387 * @completion_status: This parameter specifies the core status for the reset
391 static void isci_port_hard_reset_complete(struct isci_port
*isci_port
,
392 enum sci_status completion_status
)
394 dev_dbg(&isci_port
->isci_host
->pdev
->dev
,
395 "%s: isci_port = %p, completion_status=%x\n",
396 __func__
, isci_port
, completion_status
);
398 /* Save the status of the hard reset from the port. */
399 isci_port
->hard_reset_status
= completion_status
;
401 complete_all(&isci_port
->hard_reset_complete
);
404 /* This method will return a true value if the specified phy can be assigned to
405 * this port The following is a list of phys for each port that are allowed: -
406 * Port 0 - 3 2 1 0 - Port 1 - 1 - Port 2 - 3 2 - Port 3 - 3 This method
407 * doesn't preclude all configurations. It merely ensures that a phy is part
408 * of the allowable set of phy identifiers for that port. For example, one
409 * could assign phy 3 to port 0 and no other phys. Please refer to
410 * scic_sds_port_is_phy_mask_valid() for information regarding whether the
411 * phy_mask for a port can be supported. bool true if this is a valid phy
412 * assignment for the port false if this is not a valid phy assignment for the
415 bool scic_sds_port_is_valid_phy_assignment(struct scic_sds_port
*sci_port
,
418 /* Initialize to invalid value. */
419 u32 existing_phy_index
= SCI_MAX_PHYS
;
422 if ((sci_port
->physical_port_index
== 1) && (phy_index
!= 1)) {
426 if (sci_port
->physical_port_index
== 3 && phy_index
!= 3) {
431 (sci_port
->physical_port_index
== 2)
432 && ((phy_index
== 0) || (phy_index
== 1))
437 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
438 if ((sci_port
->phy_table
[index
] != NULL
)
439 && (index
!= phy_index
)) {
440 existing_phy_index
= index
;
445 * Ensure that all of the phys in the port are capable of
446 * operating at the same maximum link rate. */
448 (existing_phy_index
< SCI_MAX_PHYS
)
449 && (sci_port
->owning_controller
->user_parameters
.sds1
.phys
[
450 phy_index
].max_speed_generation
!=
451 sci_port
->owning_controller
->user_parameters
.sds1
.phys
[
452 existing_phy_index
].max_speed_generation
)
461 * @sci_port: This is the port object for which to determine if the phy mask
464 * This method will return a true value if the port's phy mask can be supported
465 * by the SCU. The following is a list of valid PHY mask configurations for
466 * each port: - Port 0 - [[3 2] 1] 0 - Port 1 - [1] - Port 2 - [[3] 2]
467 * - Port 3 - [3] This method returns a boolean indication specifying if the
468 * phy mask can be supported. true if this is a valid phy assignment for the
469 * port false if this is not a valid phy assignment for the port
471 static bool scic_sds_port_is_phy_mask_valid(
472 struct scic_sds_port
*sci_port
,
475 if (sci_port
->physical_port_index
== 0) {
476 if (((phy_mask
& 0x0F) == 0x0F)
477 || ((phy_mask
& 0x03) == 0x03)
478 || ((phy_mask
& 0x01) == 0x01)
481 } else if (sci_port
->physical_port_index
== 1) {
482 if (((phy_mask
& 0x02) == 0x02)
485 } else if (sci_port
->physical_port_index
== 2) {
486 if (((phy_mask
& 0x0C) == 0x0C)
487 || ((phy_mask
& 0x04) == 0x04)
490 } else if (sci_port
->physical_port_index
== 3) {
491 if (((phy_mask
& 0x08) == 0x08)
501 * @sci_port: This parameter specifies the port from which to return a
504 * This method retrieves a currently active (i.e. connected) phy contained in
505 * the port. Currently, the lowest order phy that is connected is returned.
506 * This method returns a pointer to a SCIS_SDS_PHY object. NULL This value is
507 * returned if there are no currently active (i.e. connected to a remote end
508 * point) phys contained in the port. All other values specify a struct scic_sds_phy
509 * object that is active in the port.
511 static struct scic_sds_phy
*scic_sds_port_get_a_connected_phy(
512 struct scic_sds_port
*sci_port
515 struct scic_sds_phy
*phy
;
517 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
519 * Ensure that the phy is both part of the port and currently
520 * connected to the remote end-point. */
521 phy
= sci_port
->phy_table
[index
];
524 && scic_sds_port_active_phy(sci_port
, phy
)
534 * scic_sds_port_set_phy() -
535 * @out]: port The port object to which the phy assignement is being made.
536 * @out]: phy The phy which is being assigned to the port.
538 * This method attempts to make the assignment of the phy to the port. If
539 * successful the phy is assigned to the ports phy table. bool true if the phy
540 * assignment can be made. false if the phy assignement can not be made. This
541 * is a functional test that only fails if the phy is currently assigned to a
544 static enum sci_status
scic_sds_port_set_phy(
545 struct scic_sds_port
*port
,
546 struct scic_sds_phy
*phy
)
549 * Check to see if we can add this phy to a port
550 * that means that the phy is not part of a port and that the port does
551 * not already have a phy assinged to the phy index. */
553 (port
->phy_table
[phy
->phy_index
] == NULL
)
554 && (phy_get_non_dummy_port(phy
) == NULL
)
555 && scic_sds_port_is_valid_phy_assignment(port
, phy
->phy_index
)
558 * Phy is being added in the stopped state so we are in MPC mode
559 * make logical port index = physical port index */
560 port
->logical_port_index
= port
->physical_port_index
;
561 port
->phy_table
[phy
->phy_index
] = phy
;
562 scic_sds_phy_set_port(phy
, port
);
571 * scic_sds_port_clear_phy() -
572 * @out]: port The port from which the phy is being cleared.
573 * @out]: phy The phy being cleared from the port.
575 * This method will clear the phy assigned to this port. This method fails if
576 * this phy is not currently assinged to this port. bool true if the phy is
577 * removed from the port. false if this phy is not assined to this port.
579 static enum sci_status
scic_sds_port_clear_phy(
580 struct scic_sds_port
*port
,
581 struct scic_sds_phy
*phy
)
583 /* Make sure that this phy is part of this port */
584 if (port
->phy_table
[phy
->phy_index
] == phy
&&
585 phy_get_non_dummy_port(phy
) == port
) {
586 struct scic_sds_controller
*scic
= port
->owning_controller
;
587 struct isci_host
*ihost
= scic_to_ihost(scic
);
589 /* Yep it is assigned to this port so remove it */
590 scic_sds_phy_set_port(phy
, &ihost
->ports
[SCI_MAX_PORTS
].sci
);
591 port
->phy_table
[phy
->phy_index
] = NULL
;
600 * This method requests the SAS address for the supplied SAS port from the SCI
602 * @sci_port: a handle corresponding to the SAS port for which to return the
604 * @sas_address: This parameter specifies a pointer to a SAS address structure
605 * into which the core will copy the SAS address for the port.
608 void scic_sds_port_get_sas_address(
609 struct scic_sds_port
*sci_port
,
610 struct sci_sas_address
*sas_address
)
614 sas_address
->high
= 0;
615 sas_address
->low
= 0;
617 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
618 if (sci_port
->phy_table
[index
] != NULL
) {
619 scic_sds_phy_get_sas_address(sci_port
->phy_table
[index
], sas_address
);
625 * This function requests the SAS address for the device directly attached to
627 * @sci_port: a handle corresponding to the SAS port for which to return the
629 * @sas_address: This parameter specifies a pointer to a SAS address structure
630 * into which the core will copy the SAS address for the device directly
631 * attached to the port.
634 void scic_sds_port_get_attached_sas_address(
635 struct scic_sds_port
*sci_port
,
636 struct sci_sas_address
*sas_address
)
638 struct scic_sds_phy
*sci_phy
;
641 * Ensure that the phy is both part of the port and currently
642 * connected to the remote end-point.
644 sci_phy
= scic_sds_port_get_a_connected_phy(sci_port
);
646 if (sci_phy
->protocol
!= SCIC_SDS_PHY_PROTOCOL_SATA
) {
647 scic_sds_phy_get_attached_sas_address(sci_phy
,
650 scic_sds_phy_get_sas_address(sci_phy
, sas_address
);
651 sas_address
->low
+= sci_phy
->phy_index
;
654 sas_address
->high
= 0;
655 sas_address
->low
= 0;
660 * scic_sds_port_construct_dummy_rnc() - create dummy rnc for si workaround
662 * @sci_port: logical port on which we need to create the remote node context
663 * @rni: remote node index for this remote node context.
665 * This routine will construct a dummy remote node context data structure
666 * This structure will be posted to the hardware to work around a scheduler
667 * error in the hardware.
669 static void scic_sds_port_construct_dummy_rnc(struct scic_sds_port
*sci_port
, u16 rni
)
671 union scu_remote_node_context
*rnc
;
673 rnc
= &sci_port
->owning_controller
->remote_node_context_table
[rni
];
675 memset(rnc
, 0, sizeof(union scu_remote_node_context
));
677 rnc
->ssp
.remote_sas_address_hi
= 0;
678 rnc
->ssp
.remote_sas_address_lo
= 0;
680 rnc
->ssp
.remote_node_index
= rni
;
681 rnc
->ssp
.remote_node_port_width
= 1;
682 rnc
->ssp
.logical_port_index
= sci_port
->physical_port_index
;
684 rnc
->ssp
.nexus_loss_timer_enable
= false;
685 rnc
->ssp
.check_bit
= false;
686 rnc
->ssp
.is_valid
= true;
687 rnc
->ssp
.is_remote_node_context
= true;
688 rnc
->ssp
.function_number
= 0;
689 rnc
->ssp
.arbitration_wait_time
= 0;
693 * scic_sds_port_construct_dummy_task() - create dummy task for si workaround
694 * @sci_port The logical port on which we need to create the
695 * remote node context.
697 * @tci The remote node index for this remote node context.
699 * This routine will construct a dummy task context data structure. This
700 * structure will be posted to the hardwre to work around a scheduler error
704 static void scic_sds_port_construct_dummy_task(struct scic_sds_port
*sci_port
, u16 tci
)
706 struct scu_task_context
*task_context
;
708 task_context
= scic_sds_controller_get_task_context_buffer(sci_port
->owning_controller
, tci
);
710 memset(task_context
, 0, sizeof(struct scu_task_context
));
712 task_context
->abort
= 0;
713 task_context
->priority
= 0;
714 task_context
->initiator_request
= 1;
715 task_context
->connection_rate
= 1;
716 task_context
->protocol_engine_index
= 0;
717 task_context
->logical_port_index
= sci_port
->physical_port_index
;
718 task_context
->protocol_type
= SCU_TASK_CONTEXT_PROTOCOL_SSP
;
719 task_context
->task_index
= scic_sds_io_tag_get_index(tci
);
720 task_context
->valid
= SCU_TASK_CONTEXT_VALID
;
721 task_context
->context_type
= SCU_TASK_CONTEXT_TYPE
;
723 task_context
->remote_node_index
= sci_port
->reserved_rni
;
724 task_context
->command_code
= 0;
726 task_context
->link_layer_control
= 0;
727 task_context
->do_not_dma_ssp_good_response
= 1;
728 task_context
->strict_ordering
= 0;
729 task_context
->control_frame
= 0;
730 task_context
->timeout_enable
= 0;
731 task_context
->block_guard_enable
= 0;
733 task_context
->address_modifier
= 0;
735 task_context
->task_phase
= 0x01;
738 static void scic_sds_port_destroy_dummy_resources(struct scic_sds_port
*sci_port
)
740 struct scic_sds_controller
*scic
= sci_port
->owning_controller
;
742 if (sci_port
->reserved_tci
!= SCU_DUMMY_INDEX
)
743 scic_controller_free_io_tag(scic
, sci_port
->reserved_tci
);
745 if (sci_port
->reserved_rni
!= SCU_DUMMY_INDEX
)
746 scic_sds_remote_node_table_release_remote_node_index(&scic
->available_remote_nodes
,
747 1, sci_port
->reserved_rni
);
749 sci_port
->reserved_rni
= SCU_DUMMY_INDEX
;
750 sci_port
->reserved_tci
= SCU_DUMMY_INDEX
;
754 * This method performs initialization of the supplied port. Initialization
755 * includes: - state machine initialization - member variable initialization
756 * - configuring the phy_mask
758 * @transport_layer_registers:
759 * @port_task_scheduler_registers:
760 * @port_configuration_regsiter:
762 * enum sci_status SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION This value is returned
763 * if the phy being added to the port
765 enum sci_status
scic_sds_port_initialize(
766 struct scic_sds_port
*sci_port
,
767 void __iomem
*port_task_scheduler_registers
,
768 void __iomem
*port_configuration_regsiter
,
769 void __iomem
*viit_registers
)
771 sci_port
->port_task_scheduler_registers
= port_task_scheduler_registers
;
772 sci_port
->port_pe_configuration_register
= port_configuration_regsiter
;
773 sci_port
->viit_registers
= viit_registers
;
780 * This method assigns the direct attached device ID for this port.
782 * @param[in] sci_port The port for which the direct attached device id is to
784 * @param[in] device_id The direct attached device ID to assign to the port.
785 * This will be the RNi for the device
787 void scic_sds_port_setup_transports(
788 struct scic_sds_port
*sci_port
,
793 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
794 if (sci_port
->active_phy_mask
& (1 << index
))
795 scic_sds_phy_setup_transport(sci_port
->phy_table
[index
], device_id
);
801 * @sci_port: This is the port on which the phy should be enabled.
802 * @sci_phy: This is the specific phy which to enable.
803 * @do_notify_user: This parameter specifies whether to inform the user (via
804 * scic_cb_port_link_up()) as to the fact that a new phy as become ready.
806 * This function will activate the phy in the port.
807 * Activation includes: - adding
808 * the phy to the port - enabling the Protocol Engine in the silicon. -
809 * notifying the user that the link is up. none
811 static void scic_sds_port_activate_phy(struct scic_sds_port
*sci_port
,
812 struct scic_sds_phy
*sci_phy
,
815 struct scic_sds_controller
*scic
= sci_port
->owning_controller
;
816 struct isci_host
*ihost
= scic_to_ihost(scic
);
818 if (sci_phy
->protocol
!= SCIC_SDS_PHY_PROTOCOL_SATA
)
819 scic_sds_phy_resume(sci_phy
);
821 sci_port
->active_phy_mask
|= 1 << sci_phy
->phy_index
;
823 scic_sds_controller_clear_invalid_phy(scic
, sci_phy
);
825 if (do_notify_user
== true)
826 isci_port_link_up(ihost
, sci_port
, sci_phy
);
829 void scic_sds_port_deactivate_phy(struct scic_sds_port
*sci_port
,
830 struct scic_sds_phy
*sci_phy
,
833 struct scic_sds_controller
*scic
= scic_sds_port_get_controller(sci_port
);
834 struct isci_port
*iport
= sci_port_to_iport(sci_port
);
835 struct isci_host
*ihost
= scic_to_ihost(scic
);
836 struct isci_phy
*iphy
= sci_phy_to_iphy(sci_phy
);
838 sci_port
->active_phy_mask
&= ~(1 << sci_phy
->phy_index
);
840 sci_phy
->max_negotiated_speed
= SAS_LINK_RATE_UNKNOWN
;
842 /* Re-assign the phy back to the LP as if it were a narrow port */
843 writel(sci_phy
->phy_index
,
844 &sci_port
->port_pe_configuration_register
[sci_phy
->phy_index
]);
846 if (do_notify_user
== true)
847 isci_port_link_down(ihost
, iphy
, iport
);
852 * @sci_port: This is the port on which the phy should be disabled.
853 * @sci_phy: This is the specific phy which to disabled.
855 * This function will disable the phy and report that the phy is not valid for
856 * this port object. None
858 static void scic_sds_port_invalid_link_up(struct scic_sds_port
*sci_port
,
859 struct scic_sds_phy
*sci_phy
)
861 struct scic_sds_controller
*scic
= sci_port
->owning_controller
;
864 * Check to see if we have alreay reported this link as bad and if
865 * not go ahead and tell the SCI_USER that we have discovered an
868 if ((scic
->invalid_phy_mask
& (1 << sci_phy
->phy_index
)) == 0) {
869 scic_sds_controller_set_invalid_phy(scic
, sci_phy
);
870 dev_warn(&scic_to_ihost(scic
)->pdev
->dev
, "Invalid link up!\n");
874 static bool is_port_ready_state(enum scic_sds_port_states state
)
878 case SCI_PORT_SUB_WAITING
:
879 case SCI_PORT_SUB_OPERATIONAL
:
880 case SCI_PORT_SUB_CONFIGURING
:
887 /* flag dummy rnc hanling when exiting a ready state */
888 static void port_state_machine_change(struct scic_sds_port
*sci_port
,
889 enum scic_sds_port_states state
)
891 struct sci_base_state_machine
*sm
= &sci_port
->sm
;
892 enum scic_sds_port_states old_state
= sm
->current_state_id
;
894 if (is_port_ready_state(old_state
) && !is_port_ready_state(state
))
895 sci_port
->ready_exit
= true;
897 sci_change_state(sm
, state
);
898 sci_port
->ready_exit
= false;
902 * scic_sds_port_general_link_up_handler - phy can be assigned to port?
903 * @sci_port: scic_sds_port object for which has a phy that has gone link up.
904 * @sci_phy: This is the struct scic_sds_phy object that has gone link up.
905 * @do_notify_user: This parameter specifies whether to inform the user (via
906 * scic_cb_port_link_up()) as to the fact that a new phy as become ready.
908 * Determine if this phy can be assigned to this
909 * port . If the phy is not a valid PHY for
910 * this port then the function will notify the user. A PHY can only be
911 * part of a port if it's attached SAS ADDRESS is the same as all other PHYs in
912 * the same port. none
914 static void scic_sds_port_general_link_up_handler(struct scic_sds_port
*sci_port
,
915 struct scic_sds_phy
*sci_phy
,
918 struct sci_sas_address port_sas_address
;
919 struct sci_sas_address phy_sas_address
;
921 scic_sds_port_get_attached_sas_address(sci_port
, &port_sas_address
);
922 scic_sds_phy_get_attached_sas_address(sci_phy
, &phy_sas_address
);
924 /* If the SAS address of the new phy matches the SAS address of
925 * other phys in the port OR this is the first phy in the port,
926 * then activate the phy and allow it to be used for operations
929 if ((phy_sas_address
.high
== port_sas_address
.high
&&
930 phy_sas_address
.low
== port_sas_address
.low
) ||
931 sci_port
->active_phy_mask
== 0) {
932 struct sci_base_state_machine
*sm
= &sci_port
->sm
;
934 scic_sds_port_activate_phy(sci_port
, sci_phy
, do_notify_user
);
935 if (sm
->current_state_id
== SCI_PORT_RESETTING
)
936 port_state_machine_change(sci_port
, SCI_PORT_READY
);
938 scic_sds_port_invalid_link_up(sci_port
, sci_phy
);
944 * This method returns false if the port only has a single phy object assigned.
945 * If there are no phys or more than one phy then the method will return
947 * @sci_port: The port for which the wide port condition is to be checked.
949 * bool true Is returned if this is a wide ported port. false Is returned if
950 * this is a narrow port.
952 static bool scic_sds_port_is_wide(struct scic_sds_port
*sci_port
)
957 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
958 if (sci_port
->phy_table
[index
] != NULL
) {
963 return phy_count
!= 1;
967 * This method is called by the PHY object when the link is detected. if the
968 * port wants the PHY to continue on to the link up state then the port
969 * layer must return true. If the port object returns false the phy object
970 * must halt its attempt to go link up.
971 * @sci_port: The port associated with the phy object.
972 * @sci_phy: The phy object that is trying to go link up.
974 * true if the phy object can continue to the link up condition. true Is
975 * returned if this phy can continue to the ready state. false Is returned if
976 * can not continue on to the ready state. This notification is in place for
977 * wide ports and direct attached phys. Since there are no wide ported SATA
978 * devices this could become an invalid port configuration.
980 bool scic_sds_port_link_detected(
981 struct scic_sds_port
*sci_port
,
982 struct scic_sds_phy
*sci_phy
)
984 if ((sci_port
->logical_port_index
!= SCIC_SDS_DUMMY_PORT
) &&
985 (sci_phy
->protocol
== SCIC_SDS_PHY_PROTOCOL_SATA
) &&
986 scic_sds_port_is_wide(sci_port
)) {
987 scic_sds_port_invalid_link_up(sci_port
, sci_phy
);
995 static void port_timeout(unsigned long data
)
997 struct sci_timer
*tmr
= (struct sci_timer
*)data
;
998 struct scic_sds_port
*sci_port
= container_of(tmr
, typeof(*sci_port
), timer
);
999 struct isci_host
*ihost
= scic_to_ihost(sci_port
->owning_controller
);
1000 unsigned long flags
;
1003 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
1008 current_state
= sci_port
->sm
.current_state_id
;
1010 if (current_state
== SCI_PORT_RESETTING
) {
1011 /* if the port is still in the resetting state then the timeout
1012 * fired before the reset completed.
1014 port_state_machine_change(sci_port
, SCI_PORT_FAILED
);
1015 } else if (current_state
== SCI_PORT_STOPPED
) {
1016 /* if the port is stopped then the start request failed In this
1017 * case stay in the stopped state.
1019 dev_err(sciport_to_dev(sci_port
),
1020 "%s: SCIC Port 0x%p failed to stop before tiemout.\n",
1023 } else if (current_state
== SCI_PORT_STOPPING
) {
1024 /* if the port is still stopping then the stop has not completed */
1025 isci_port_stop_complete(sci_port
->owning_controller
,
1027 SCI_FAILURE_TIMEOUT
);
1029 /* The port is in the ready state and we have a timer
1030 * reporting a timeout this should not happen.
1032 dev_err(sciport_to_dev(sci_port
),
1033 "%s: SCIC Port 0x%p is processing a timeout operation "
1034 "in state %d.\n", __func__
, sci_port
, current_state
);
1038 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
1041 /* --------------------------------------------------------------------------- */
1044 * This function updates the hardwares VIIT entry for this port.
1048 static void scic_sds_port_update_viit_entry(struct scic_sds_port
*sci_port
)
1050 struct sci_sas_address sas_address
;
1052 scic_sds_port_get_sas_address(sci_port
, &sas_address
);
1054 writel(sas_address
.high
,
1055 &sci_port
->viit_registers
->initiator_sas_address_hi
);
1056 writel(sas_address
.low
,
1057 &sci_port
->viit_registers
->initiator_sas_address_lo
);
1059 /* This value get cleared just in case its not already cleared */
1060 writel(0, &sci_port
->viit_registers
->reserved
);
1062 /* We are required to update the status register last */
1063 writel(SCU_VIIT_ENTRY_ID_VIIT
|
1064 SCU_VIIT_IPPT_INITIATOR
|
1065 ((1 << sci_port
->physical_port_index
) << SCU_VIIT_ENTRY_LPVIE_SHIFT
) |
1066 SCU_VIIT_STATUS_ALL_VALID
,
1067 &sci_port
->viit_registers
->status
);
1071 * This method returns the maximum allowed speed for data transfers on this
1072 * port. This maximum allowed speed evaluates to the maximum speed of the
1073 * slowest phy in the port.
1074 * @sci_port: This parameter specifies the port for which to retrieve the
1075 * maximum allowed speed.
1077 * This method returns the maximum negotiated speed of the slowest phy in the
1080 enum sas_linkrate
scic_sds_port_get_max_allowed_speed(
1081 struct scic_sds_port
*sci_port
)
1084 enum sas_linkrate max_allowed_speed
= SAS_LINK_RATE_6_0_GBPS
;
1085 struct scic_sds_phy
*phy
= NULL
;
1088 * Loop through all of the phys in this port and find the phy with the
1089 * lowest maximum link rate. */
1090 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
1091 phy
= sci_port
->phy_table
[index
];
1094 && (scic_sds_port_active_phy(sci_port
, phy
) == true)
1095 && (phy
->max_negotiated_speed
< max_allowed_speed
)
1097 max_allowed_speed
= phy
->max_negotiated_speed
;
1100 return max_allowed_speed
;
1105 * @sci_port: This is the struct scic_sds_port object to suspend.
1107 * This method will susped the port task scheduler for this port object. none
1110 scic_sds_port_suspend_port_task_scheduler(struct scic_sds_port
*port
)
1112 u32 pts_control_value
;
1114 pts_control_value
= readl(&port
->port_task_scheduler_registers
->control
);
1115 pts_control_value
|= SCU_PTSxCR_GEN_BIT(SUSPEND
);
1116 writel(pts_control_value
, &port
->port_task_scheduler_registers
->control
);
1120 * scic_sds_port_post_dummy_request() - post dummy/workaround request
1121 * @sci_port: port to post task
1123 * Prevent the hardware scheduler from posting new requests to the front
1124 * of the scheduler queue causing a starvation problem for currently
1128 static void scic_sds_port_post_dummy_request(struct scic_sds_port
*sci_port
)
1131 struct scu_task_context
*task_context
;
1132 struct scic_sds_controller
*scic
= sci_port
->owning_controller
;
1133 u16 tci
= sci_port
->reserved_tci
;
1135 task_context
= scic_sds_controller_get_task_context_buffer(scic
, tci
);
1137 task_context
->abort
= 0;
1139 command
= SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC
|
1140 sci_port
->physical_port_index
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
|
1143 scic_sds_controller_post_request(scic
, command
);
1147 * This routine will abort the dummy request. This will alow the hardware to
1148 * power down parts of the silicon to save power.
1150 * @sci_port: The port on which the task must be aborted.
1153 static void scic_sds_port_abort_dummy_request(struct scic_sds_port
*sci_port
)
1155 struct scic_sds_controller
*scic
= sci_port
->owning_controller
;
1156 u16 tci
= sci_port
->reserved_tci
;
1157 struct scu_task_context
*tc
;
1160 tc
= scic_sds_controller_get_task_context_buffer(scic
, tci
);
1164 command
= SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT
|
1165 sci_port
->physical_port_index
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
|
1168 scic_sds_controller_post_request(scic
, command
);
1173 * @sci_port: This is the struct scic_sds_port object to resume.
1175 * This method will resume the port task scheduler for this port object. none
1178 scic_sds_port_resume_port_task_scheduler(struct scic_sds_port
*port
)
1180 u32 pts_control_value
;
1182 pts_control_value
= readl(&port
->port_task_scheduler_registers
->control
);
1183 pts_control_value
&= ~SCU_PTSxCR_GEN_BIT(SUSPEND
);
1184 writel(pts_control_value
, &port
->port_task_scheduler_registers
->control
);
1187 static void scic_sds_port_ready_substate_waiting_enter(struct sci_base_state_machine
*sm
)
1189 struct scic_sds_port
*sci_port
= container_of(sm
, typeof(*sci_port
), sm
);
1191 scic_sds_port_suspend_port_task_scheduler(sci_port
);
1193 sci_port
->not_ready_reason
= SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS
;
1195 if (sci_port
->active_phy_mask
!= 0) {
1196 /* At least one of the phys on the port is ready */
1197 port_state_machine_change(sci_port
,
1198 SCI_PORT_SUB_OPERATIONAL
);
1202 static void scic_sds_port_ready_substate_operational_enter(struct sci_base_state_machine
*sm
)
1205 struct scic_sds_port
*sci_port
= container_of(sm
, typeof(*sci_port
), sm
);
1206 struct scic_sds_controller
*scic
= sci_port
->owning_controller
;
1207 struct isci_host
*ihost
= scic_to_ihost(scic
);
1208 struct isci_port
*iport
= sci_port_to_iport(sci_port
);
1210 isci_port_ready(ihost
, iport
);
1212 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
1213 if (sci_port
->phy_table
[index
]) {
1214 writel(sci_port
->physical_port_index
,
1215 &sci_port
->port_pe_configuration_register
[
1216 sci_port
->phy_table
[index
]->phy_index
]);
1220 scic_sds_port_update_viit_entry(sci_port
);
1222 scic_sds_port_resume_port_task_scheduler(sci_port
);
1225 * Post the dummy task for the port so the hardware can schedule
1228 scic_sds_port_post_dummy_request(sci_port
);
1231 static void scic_sds_port_invalidate_dummy_remote_node(struct scic_sds_port
*sci_port
)
1233 struct scic_sds_controller
*scic
= sci_port
->owning_controller
;
1234 u8 phys_index
= sci_port
->physical_port_index
;
1235 union scu_remote_node_context
*rnc
;
1236 u16 rni
= sci_port
->reserved_rni
;
1239 rnc
= &scic
->remote_node_context_table
[rni
];
1241 rnc
->ssp
.is_valid
= false;
1243 /* ensure the preceding tc abort request has reached the
1244 * controller and give it ample time to act before posting the rnc
1247 readl(&scic
->smu_registers
->interrupt_status
); /* flush */
1250 command
= SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE
|
1251 phys_index
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
| rni
;
1253 scic_sds_controller_post_request(scic
, command
);
1258 * @object: This is the object which is cast to a struct scic_sds_port object.
1260 * This method will perform the actions required by the struct scic_sds_port on
1261 * exiting the SCI_PORT_SUB_OPERATIONAL. This function reports
1262 * the port not ready and suspends the port task scheduler. none
1264 static void scic_sds_port_ready_substate_operational_exit(struct sci_base_state_machine
*sm
)
1266 struct scic_sds_port
*sci_port
= container_of(sm
, typeof(*sci_port
), sm
);
1267 struct scic_sds_controller
*scic
= sci_port
->owning_controller
;
1268 struct isci_host
*ihost
= scic_to_ihost(scic
);
1269 struct isci_port
*iport
= sci_port_to_iport(sci_port
);
1272 * Kill the dummy task for this port if it has not yet posted
1273 * the hardware will treat this as a NOP and just return abort
1276 scic_sds_port_abort_dummy_request(sci_port
);
1278 isci_port_not_ready(ihost
, iport
);
1280 if (sci_port
->ready_exit
)
1281 scic_sds_port_invalidate_dummy_remote_node(sci_port
);
1284 static void scic_sds_port_ready_substate_configuring_enter(struct sci_base_state_machine
*sm
)
1286 struct scic_sds_port
*sci_port
= container_of(sm
, typeof(*sci_port
), sm
);
1287 struct scic_sds_controller
*scic
= sci_port
->owning_controller
;
1288 struct isci_host
*ihost
= scic_to_ihost(scic
);
1289 struct isci_port
*iport
= sci_port_to_iport(sci_port
);
1291 if (sci_port
->active_phy_mask
== 0) {
1292 isci_port_not_ready(ihost
, iport
);
1294 port_state_machine_change(sci_port
,
1295 SCI_PORT_SUB_WAITING
);
1296 } else if (sci_port
->started_request_count
== 0)
1297 port_state_machine_change(sci_port
,
1298 SCI_PORT_SUB_OPERATIONAL
);
1301 static void scic_sds_port_ready_substate_configuring_exit(struct sci_base_state_machine
*sm
)
1303 struct scic_sds_port
*sci_port
= container_of(sm
, typeof(*sci_port
), sm
);
1305 scic_sds_port_suspend_port_task_scheduler(sci_port
);
1306 if (sci_port
->ready_exit
)
1307 scic_sds_port_invalidate_dummy_remote_node(sci_port
);
1310 enum sci_status
scic_sds_port_start(struct scic_sds_port
*sci_port
)
1312 struct scic_sds_controller
*scic
= sci_port
->owning_controller
;
1313 enum sci_status status
= SCI_SUCCESS
;
1314 enum scic_sds_port_states state
;
1317 state
= sci_port
->sm
.current_state_id
;
1318 if (state
!= SCI_PORT_STOPPED
) {
1319 dev_warn(sciport_to_dev(sci_port
),
1320 "%s: in wrong state: %d\n", __func__
, state
);
1321 return SCI_FAILURE_INVALID_STATE
;
1324 if (sci_port
->assigned_device_count
> 0) {
1325 /* TODO This is a start failure operation because
1326 * there are still devices assigned to this port.
1327 * There must be no devices assigned to a port on a
1330 return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION
;
1333 if (sci_port
->reserved_rni
== SCU_DUMMY_INDEX
) {
1334 u16 rni
= scic_sds_remote_node_table_allocate_remote_node(
1335 &scic
->available_remote_nodes
, 1);
1337 if (rni
!= SCU_DUMMY_INDEX
)
1338 scic_sds_port_construct_dummy_rnc(sci_port
, rni
);
1340 status
= SCI_FAILURE_INSUFFICIENT_RESOURCES
;
1341 sci_port
->reserved_rni
= rni
;
1344 if (sci_port
->reserved_tci
== SCU_DUMMY_INDEX
) {
1345 /* Allocate a TCI and remove the sequence nibble */
1346 u16 tci
= scic_controller_allocate_io_tag(scic
);
1348 if (tci
!= SCU_DUMMY_INDEX
)
1349 scic_sds_port_construct_dummy_task(sci_port
, tci
);
1351 status
= SCI_FAILURE_INSUFFICIENT_RESOURCES
;
1352 sci_port
->reserved_tci
= tci
;
1355 if (status
== SCI_SUCCESS
) {
1356 phy_mask
= scic_sds_port_get_phys(sci_port
);
1359 * There are one or more phys assigned to this port. Make sure
1360 * the port's phy mask is in fact legal and supported by the
1363 if (scic_sds_port_is_phy_mask_valid(sci_port
, phy_mask
) == true) {
1364 port_state_machine_change(sci_port
,
1369 status
= SCI_FAILURE
;
1372 if (status
!= SCI_SUCCESS
)
1373 scic_sds_port_destroy_dummy_resources(sci_port
);
1378 enum sci_status
scic_sds_port_stop(struct scic_sds_port
*sci_port
)
1380 enum scic_sds_port_states state
;
1382 state
= sci_port
->sm
.current_state_id
;
1384 case SCI_PORT_STOPPED
:
1386 case SCI_PORT_SUB_WAITING
:
1387 case SCI_PORT_SUB_OPERATIONAL
:
1388 case SCI_PORT_SUB_CONFIGURING
:
1389 case SCI_PORT_RESETTING
:
1390 port_state_machine_change(sci_port
,
1394 dev_warn(sciport_to_dev(sci_port
),
1395 "%s: in wrong state: %d\n", __func__
, state
);
1396 return SCI_FAILURE_INVALID_STATE
;
1400 static enum sci_status
scic_port_hard_reset(struct scic_sds_port
*sci_port
, u32 timeout
)
1402 enum sci_status status
= SCI_FAILURE_INVALID_PHY
;
1403 struct scic_sds_phy
*selected_phy
= NULL
;
1404 enum scic_sds_port_states state
;
1407 state
= sci_port
->sm
.current_state_id
;
1408 if (state
!= SCI_PORT_SUB_OPERATIONAL
) {
1409 dev_warn(sciport_to_dev(sci_port
),
1410 "%s: in wrong state: %d\n", __func__
, state
);
1411 return SCI_FAILURE_INVALID_STATE
;
1414 /* Select a phy on which we can send the hard reset request. */
1415 for (phy_index
= 0; phy_index
< SCI_MAX_PHYS
&& !selected_phy
; phy_index
++) {
1416 selected_phy
= sci_port
->phy_table
[phy_index
];
1418 !scic_sds_port_active_phy(sci_port
, selected_phy
)) {
1420 * We found a phy but it is not ready select
1423 selected_phy
= NULL
;
1427 /* If we have a phy then go ahead and start the reset procedure */
1430 status
= scic_sds_phy_reset(selected_phy
);
1432 if (status
!= SCI_SUCCESS
)
1435 sci_mod_timer(&sci_port
->timer
, timeout
);
1436 sci_port
->not_ready_reason
= SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED
;
1438 port_state_machine_change(sci_port
,
1439 SCI_PORT_RESETTING
);
1444 * scic_sds_port_add_phy() -
1445 * @sci_port: This parameter specifies the port in which the phy will be added.
1446 * @sci_phy: This parameter is the phy which is to be added to the port.
1448 * This method will add a PHY to the selected port. This method returns an
1449 * enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other
1450 * status is a failure to add the phy to the port.
1452 enum sci_status
scic_sds_port_add_phy(struct scic_sds_port
*sci_port
,
1453 struct scic_sds_phy
*sci_phy
)
1455 enum sci_status status
;
1456 enum scic_sds_port_states state
;
1458 state
= sci_port
->sm
.current_state_id
;
1460 case SCI_PORT_STOPPED
: {
1461 struct sci_sas_address port_sas_address
;
1463 /* Read the port assigned SAS Address if there is one */
1464 scic_sds_port_get_sas_address(sci_port
, &port_sas_address
);
1466 if (port_sas_address
.high
!= 0 && port_sas_address
.low
!= 0) {
1467 struct sci_sas_address phy_sas_address
;
1469 /* Make sure that the PHY SAS Address matches the SAS Address
1472 scic_sds_phy_get_sas_address(sci_phy
, &phy_sas_address
);
1474 if (port_sas_address
.high
!= phy_sas_address
.high
||
1475 port_sas_address
.low
!= phy_sas_address
.low
)
1476 return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION
;
1478 return scic_sds_port_set_phy(sci_port
, sci_phy
);
1480 case SCI_PORT_SUB_WAITING
:
1481 case SCI_PORT_SUB_OPERATIONAL
:
1482 status
= scic_sds_port_set_phy(sci_port
, sci_phy
);
1484 if (status
!= SCI_SUCCESS
)
1487 scic_sds_port_general_link_up_handler(sci_port
, sci_phy
, true);
1488 sci_port
->not_ready_reason
= SCIC_PORT_NOT_READY_RECONFIGURING
;
1489 port_state_machine_change(sci_port
, SCI_PORT_SUB_CONFIGURING
);
1492 case SCI_PORT_SUB_CONFIGURING
:
1493 status
= scic_sds_port_set_phy(sci_port
, sci_phy
);
1495 if (status
!= SCI_SUCCESS
)
1497 scic_sds_port_general_link_up_handler(sci_port
, sci_phy
, true);
1499 /* Re-enter the configuring state since this may be the last phy in
1502 port_state_machine_change(sci_port
,
1503 SCI_PORT_SUB_CONFIGURING
);
1506 dev_warn(sciport_to_dev(sci_port
),
1507 "%s: in wrong state: %d\n", __func__
, state
);
1508 return SCI_FAILURE_INVALID_STATE
;
1513 * scic_sds_port_remove_phy() -
1514 * @sci_port: This parameter specifies the port in which the phy will be added.
1515 * @sci_phy: This parameter is the phy which is to be added to the port.
1517 * This method will remove the PHY from the selected PORT. This method returns
1518 * an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any
1519 * other status is a failure to add the phy to the port.
1521 enum sci_status
scic_sds_port_remove_phy(struct scic_sds_port
*sci_port
,
1522 struct scic_sds_phy
*sci_phy
)
1524 enum sci_status status
;
1525 enum scic_sds_port_states state
;
1527 state
= sci_port
->sm
.current_state_id
;
1530 case SCI_PORT_STOPPED
:
1531 return scic_sds_port_clear_phy(sci_port
, sci_phy
);
1532 case SCI_PORT_SUB_OPERATIONAL
:
1533 status
= scic_sds_port_clear_phy(sci_port
, sci_phy
);
1534 if (status
!= SCI_SUCCESS
)
1537 scic_sds_port_deactivate_phy(sci_port
, sci_phy
, true);
1538 sci_port
->not_ready_reason
= SCIC_PORT_NOT_READY_RECONFIGURING
;
1539 port_state_machine_change(sci_port
,
1540 SCI_PORT_SUB_CONFIGURING
);
1542 case SCI_PORT_SUB_CONFIGURING
:
1543 status
= scic_sds_port_clear_phy(sci_port
, sci_phy
);
1545 if (status
!= SCI_SUCCESS
)
1547 scic_sds_port_deactivate_phy(sci_port
, sci_phy
, true);
1549 /* Re-enter the configuring state since this may be the last phy in
1552 port_state_machine_change(sci_port
,
1553 SCI_PORT_SUB_CONFIGURING
);
1556 dev_warn(sciport_to_dev(sci_port
),
1557 "%s: in wrong state: %d\n", __func__
, state
);
1558 return SCI_FAILURE_INVALID_STATE
;
1562 enum sci_status
scic_sds_port_link_up(struct scic_sds_port
*sci_port
,
1563 struct scic_sds_phy
*sci_phy
)
1565 enum scic_sds_port_states state
;
1567 state
= sci_port
->sm
.current_state_id
;
1569 case SCI_PORT_SUB_WAITING
:
1570 /* Since this is the first phy going link up for the port we
1571 * can just enable it and continue
1573 scic_sds_port_activate_phy(sci_port
, sci_phy
, true);
1575 port_state_machine_change(sci_port
,
1576 SCI_PORT_SUB_OPERATIONAL
);
1578 case SCI_PORT_SUB_OPERATIONAL
:
1579 scic_sds_port_general_link_up_handler(sci_port
, sci_phy
, true);
1581 case SCI_PORT_RESETTING
:
1582 /* TODO We should make sure that the phy that has gone
1583 * link up is the same one on which we sent the reset. It is
1584 * possible that the phy on which we sent the reset is not the
1585 * one that has gone link up and we want to make sure that
1586 * phy being reset comes back. Consider the case where a
1587 * reset is sent but before the hardware processes the reset it
1588 * get a link up on the port because of a hot plug event.
1589 * because of the reset request this phy will go link down
1590 * almost immediately.
1593 /* In the resetting state we don't notify the user regarding
1594 * link up and link down notifications.
1596 scic_sds_port_general_link_up_handler(sci_port
, sci_phy
, false);
1599 dev_warn(sciport_to_dev(sci_port
),
1600 "%s: in wrong state: %d\n", __func__
, state
);
1601 return SCI_FAILURE_INVALID_STATE
;
1605 enum sci_status
scic_sds_port_link_down(struct scic_sds_port
*sci_port
,
1606 struct scic_sds_phy
*sci_phy
)
1608 enum scic_sds_port_states state
;
1610 state
= sci_port
->sm
.current_state_id
;
1612 case SCI_PORT_SUB_OPERATIONAL
:
1613 scic_sds_port_deactivate_phy(sci_port
, sci_phy
, true);
1615 /* If there are no active phys left in the port, then
1616 * transition the port to the WAITING state until such time
1617 * as a phy goes link up
1619 if (sci_port
->active_phy_mask
== 0)
1620 port_state_machine_change(sci_port
,
1621 SCI_PORT_SUB_WAITING
);
1623 case SCI_PORT_RESETTING
:
1624 /* In the resetting state we don't notify the user regarding
1625 * link up and link down notifications. */
1626 scic_sds_port_deactivate_phy(sci_port
, sci_phy
, false);
1629 dev_warn(sciport_to_dev(sci_port
),
1630 "%s: in wrong state: %d\n", __func__
, state
);
1631 return SCI_FAILURE_INVALID_STATE
;
1635 enum sci_status
scic_sds_port_start_io(struct scic_sds_port
*sci_port
,
1636 struct scic_sds_remote_device
*sci_dev
,
1637 struct scic_sds_request
*sci_req
)
1639 enum scic_sds_port_states state
;
1641 state
= sci_port
->sm
.current_state_id
;
1643 case SCI_PORT_SUB_WAITING
:
1644 return SCI_FAILURE_INVALID_STATE
;
1645 case SCI_PORT_SUB_OPERATIONAL
:
1646 sci_port
->started_request_count
++;
1649 dev_warn(sciport_to_dev(sci_port
),
1650 "%s: in wrong state: %d\n", __func__
, state
);
1651 return SCI_FAILURE_INVALID_STATE
;
1655 enum sci_status
scic_sds_port_complete_io(struct scic_sds_port
*sci_port
,
1656 struct scic_sds_remote_device
*sci_dev
,
1657 struct scic_sds_request
*sci_req
)
1659 enum scic_sds_port_states state
;
1661 state
= sci_port
->sm
.current_state_id
;
1663 case SCI_PORT_STOPPED
:
1664 dev_warn(sciport_to_dev(sci_port
),
1665 "%s: in wrong state: %d\n", __func__
, state
);
1666 return SCI_FAILURE_INVALID_STATE
;
1667 case SCI_PORT_STOPPING
:
1668 scic_sds_port_decrement_request_count(sci_port
);
1670 if (sci_port
->started_request_count
== 0)
1671 port_state_machine_change(sci_port
,
1674 case SCI_PORT_READY
:
1675 case SCI_PORT_RESETTING
:
1676 case SCI_PORT_FAILED
:
1677 case SCI_PORT_SUB_WAITING
:
1678 case SCI_PORT_SUB_OPERATIONAL
:
1679 scic_sds_port_decrement_request_count(sci_port
);
1681 case SCI_PORT_SUB_CONFIGURING
:
1682 scic_sds_port_decrement_request_count(sci_port
);
1683 if (sci_port
->started_request_count
== 0) {
1684 port_state_machine_change(sci_port
,
1685 SCI_PORT_SUB_OPERATIONAL
);
1694 * @sci_port: This is the port object which to suspend.
1696 * This method will enable the SCU Port Task Scheduler for this port object but
1697 * will leave the port task scheduler in a suspended state. none
1700 scic_sds_port_enable_port_task_scheduler(struct scic_sds_port
*port
)
1702 u32 pts_control_value
;
1704 pts_control_value
= readl(&port
->port_task_scheduler_registers
->control
);
1705 pts_control_value
|= SCU_PTSxCR_GEN_BIT(ENABLE
) | SCU_PTSxCR_GEN_BIT(SUSPEND
);
1706 writel(pts_control_value
, &port
->port_task_scheduler_registers
->control
);
1711 * @sci_port: This is the port object which to resume.
1713 * This method will disable the SCU port task scheduler for this port object.
1717 scic_sds_port_disable_port_task_scheduler(struct scic_sds_port
*port
)
1719 u32 pts_control_value
;
1721 pts_control_value
= readl(&port
->port_task_scheduler_registers
->control
);
1722 pts_control_value
&=
1723 ~(SCU_PTSxCR_GEN_BIT(ENABLE
) | SCU_PTSxCR_GEN_BIT(SUSPEND
));
1724 writel(pts_control_value
, &port
->port_task_scheduler_registers
->control
);
1727 static void scic_sds_port_post_dummy_remote_node(struct scic_sds_port
*sci_port
)
1729 struct scic_sds_controller
*scic
= sci_port
->owning_controller
;
1730 u8 phys_index
= sci_port
->physical_port_index
;
1731 union scu_remote_node_context
*rnc
;
1732 u16 rni
= sci_port
->reserved_rni
;
1735 rnc
= &scic
->remote_node_context_table
[rni
];
1736 rnc
->ssp
.is_valid
= true;
1738 command
= SCU_CONTEXT_COMMAND_POST_RNC_32
|
1739 phys_index
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
| rni
;
1741 scic_sds_controller_post_request(scic
, command
);
1743 /* ensure hardware has seen the post rnc command and give it
1744 * ample time to act before sending the suspend
1746 readl(&scic
->smu_registers
->interrupt_status
); /* flush */
1749 command
= SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX
|
1750 phys_index
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
| rni
;
1752 scic_sds_controller_post_request(scic
, command
);
1755 static void scic_sds_port_stopped_state_enter(struct sci_base_state_machine
*sm
)
1757 struct scic_sds_port
*sci_port
= container_of(sm
, typeof(*sci_port
), sm
);
1759 if (sci_port
->sm
.previous_state_id
== SCI_PORT_STOPPING
) {
1761 * If we enter this state becasuse of a request to stop
1762 * the port then we want to disable the hardwares port
1763 * task scheduler. */
1764 scic_sds_port_disable_port_task_scheduler(sci_port
);
1768 static void scic_sds_port_stopped_state_exit(struct sci_base_state_machine
*sm
)
1770 struct scic_sds_port
*sci_port
= container_of(sm
, typeof(*sci_port
), sm
);
1772 /* Enable and suspend the port task scheduler */
1773 scic_sds_port_enable_port_task_scheduler(sci_port
);
1776 static void scic_sds_port_ready_state_enter(struct sci_base_state_machine
*sm
)
1778 struct scic_sds_port
*sci_port
= container_of(sm
, typeof(*sci_port
), sm
);
1779 struct scic_sds_controller
*scic
= sci_port
->owning_controller
;
1780 struct isci_host
*ihost
= scic_to_ihost(scic
);
1781 struct isci_port
*iport
= sci_port_to_iport(sci_port
);
1784 prev_state
= sci_port
->sm
.previous_state_id
;
1785 if (prev_state
== SCI_PORT_RESETTING
)
1786 isci_port_hard_reset_complete(iport
, SCI_SUCCESS
);
1788 isci_port_not_ready(ihost
, iport
);
1790 /* Post and suspend the dummy remote node context for this port. */
1791 scic_sds_port_post_dummy_remote_node(sci_port
);
1793 /* Start the ready substate machine */
1794 port_state_machine_change(sci_port
,
1795 SCI_PORT_SUB_WAITING
);
1798 static void scic_sds_port_resetting_state_exit(struct sci_base_state_machine
*sm
)
1800 struct scic_sds_port
*sci_port
= container_of(sm
, typeof(*sci_port
), sm
);
1802 sci_del_timer(&sci_port
->timer
);
1805 static void scic_sds_port_stopping_state_exit(struct sci_base_state_machine
*sm
)
1807 struct scic_sds_port
*sci_port
= container_of(sm
, typeof(*sci_port
), sm
);
1809 sci_del_timer(&sci_port
->timer
);
1811 scic_sds_port_destroy_dummy_resources(sci_port
);
1814 static void scic_sds_port_failed_state_enter(struct sci_base_state_machine
*sm
)
1816 struct scic_sds_port
*sci_port
= container_of(sm
, typeof(*sci_port
), sm
);
1817 struct isci_port
*iport
= sci_port_to_iport(sci_port
);
1819 isci_port_hard_reset_complete(iport
, SCI_FAILURE_TIMEOUT
);
1822 /* --------------------------------------------------------------------------- */
1824 static const struct sci_base_state scic_sds_port_state_table
[] = {
1825 [SCI_PORT_STOPPED
] = {
1826 .enter_state
= scic_sds_port_stopped_state_enter
,
1827 .exit_state
= scic_sds_port_stopped_state_exit
1829 [SCI_PORT_STOPPING
] = {
1830 .exit_state
= scic_sds_port_stopping_state_exit
1832 [SCI_PORT_READY
] = {
1833 .enter_state
= scic_sds_port_ready_state_enter
,
1835 [SCI_PORT_SUB_WAITING
] = {
1836 .enter_state
= scic_sds_port_ready_substate_waiting_enter
,
1838 [SCI_PORT_SUB_OPERATIONAL
] = {
1839 .enter_state
= scic_sds_port_ready_substate_operational_enter
,
1840 .exit_state
= scic_sds_port_ready_substate_operational_exit
1842 [SCI_PORT_SUB_CONFIGURING
] = {
1843 .enter_state
= scic_sds_port_ready_substate_configuring_enter
,
1844 .exit_state
= scic_sds_port_ready_substate_configuring_exit
1846 [SCI_PORT_RESETTING
] = {
1847 .exit_state
= scic_sds_port_resetting_state_exit
1849 [SCI_PORT_FAILED
] = {
1850 .enter_state
= scic_sds_port_failed_state_enter
,
1854 void scic_sds_port_construct(struct scic_sds_port
*sci_port
, u8 index
,
1855 struct scic_sds_controller
*scic
)
1857 sci_init_sm(&sci_port
->sm
, scic_sds_port_state_table
, SCI_PORT_STOPPED
);
1859 sci_port
->logical_port_index
= SCIC_SDS_DUMMY_PORT
;
1860 sci_port
->physical_port_index
= index
;
1861 sci_port
->active_phy_mask
= 0;
1862 sci_port
->ready_exit
= false;
1864 sci_port
->owning_controller
= scic
;
1866 sci_port
->started_request_count
= 0;
1867 sci_port
->assigned_device_count
= 0;
1869 sci_port
->reserved_rni
= SCU_DUMMY_INDEX
;
1870 sci_port
->reserved_tci
= SCU_DUMMY_INDEX
;
1872 sci_init_timer(&sci_port
->timer
, port_timeout
);
1874 sci_port
->port_task_scheduler_registers
= NULL
;
1876 for (index
= 0; index
< SCI_MAX_PHYS
; index
++)
1877 sci_port
->phy_table
[index
] = NULL
;
1880 void isci_port_init(struct isci_port
*iport
, struct isci_host
*ihost
, int index
)
1882 INIT_LIST_HEAD(&iport
->remote_dev_list
);
1883 INIT_LIST_HEAD(&iport
->domain_dev_list
);
1884 spin_lock_init(&iport
->state_lock
);
1885 init_completion(&iport
->start_complete
);
1886 iport
->isci_host
= ihost
;
1887 isci_port_change_state(iport
, isci_freed
);
1888 atomic_set(&iport
->event
, 0);
1892 * isci_port_get_state() - This function gets the status of the port object.
1893 * @isci_port: This parameter points to the isci_port object
1895 * status of the object as a isci_status enum.
1897 enum isci_status
isci_port_get_state(
1898 struct isci_port
*isci_port
)
1900 return isci_port
->status
;
1903 void scic_sds_port_broadcast_change_received(
1904 struct scic_sds_port
*sci_port
,
1905 struct scic_sds_phy
*sci_phy
)
1907 struct scic_sds_controller
*scic
= sci_port
->owning_controller
;
1908 struct isci_host
*ihost
= scic_to_ihost(scic
);
1910 /* notify the user. */
1911 isci_port_bc_change_received(ihost
, sci_port
, sci_phy
);
1914 int isci_port_perform_hard_reset(struct isci_host
*ihost
, struct isci_port
*iport
,
1915 struct isci_phy
*iphy
)
1917 unsigned long flags
;
1918 enum sci_status status
;
1919 int ret
= TMF_RESP_FUNC_COMPLETE
;
1921 dev_dbg(&ihost
->pdev
->dev
, "%s: iport = %p\n",
1924 init_completion(&iport
->hard_reset_complete
);
1926 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
1928 #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
1929 status
= scic_port_hard_reset(&iport
->sci
, ISCI_PORT_RESET_TIMEOUT
);
1931 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
1933 if (status
== SCI_SUCCESS
) {
1934 wait_for_completion(&iport
->hard_reset_complete
);
1936 dev_dbg(&ihost
->pdev
->dev
,
1937 "%s: iport = %p; hard reset completion\n",
1940 if (iport
->hard_reset_status
!= SCI_SUCCESS
)
1941 ret
= TMF_RESP_FUNC_FAILED
;
1943 ret
= TMF_RESP_FUNC_FAILED
;
1945 dev_err(&ihost
->pdev
->dev
,
1946 "%s: iport = %p; scic_port_hard_reset call"
1948 __func__
, iport
, status
);
1952 /* If the hard reset for the port has failed, consider this
1953 * the same as link failures on all phys in the port.
1955 if (ret
!= TMF_RESP_FUNC_COMPLETE
) {
1956 dev_err(&ihost
->pdev
->dev
,
1957 "%s: iport = %p; hard reset failed "
1958 "(0x%x) - sending link down to libsas for phy %p\n",
1959 __func__
, iport
, iport
->hard_reset_status
, iphy
);
1961 isci_port_link_down(ihost
, iphy
, iport
);
1968 * isci_port_deformed() - This function is called by libsas when a port becomes
1970 * @phy: This parameter specifies the libsas phy with the inactive port.
1973 void isci_port_deformed(struct asd_sas_phy
*phy
)
1975 pr_debug("%s: sas_phy = %p\n", __func__
, phy
);
1979 * isci_port_formed() - This function is called by libsas when a port becomes
1981 * @phy: This parameter specifies the libsas phy with the active port.
1984 void isci_port_formed(struct asd_sas_phy
*phy
)
1986 pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__
, phy
, phy
->port
);