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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 idx, 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) {
1957 dev_err(&ihost->pdev->dev,
1958 "%s: iport = %p; hard reset failed "
1959 "(0x%x) - driving explicit link fail for all phys\n",
1960 __func__, iport, iport->hard_reset_status);
1962 /* Down all phys in the port. */
1963 spin_lock_irqsave(&ihost->scic_lock, flags);
1964 for (idx = 0; idx < SCI_MAX_PHYS; ++idx) {
1966 if (iport->sci.phy_table[idx] != NULL) {
1969 iport->sci.phy_table[idx]);
1971 iport->sci.phy_table[idx]);
1974 spin_unlock_irqrestore(&ihost->scic_lock, flags);
1980 * isci_port_deformed() - This function is called by libsas when a port becomes
1982 * @phy: This parameter specifies the libsas phy with the inactive port.
1985 void isci_port_deformed(struct asd_sas_phy *phy)
1987 pr_debug("%s: sas_phy = %p\n", __func__, phy);
1991 * isci_port_formed() - This function is called by libsas when a port becomes
1993 * @phy: This parameter specifies the libsas phy with the active port.
1996 void isci_port_formed(struct asd_sas_phy *phy)
1998 pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port);