isci: unify phy event handlers
Unify the implementations in scic_sds_phy_event_handler(), and kill the state handler
Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/scsi/isci/phy.c b/drivers/scsi/isci/phy.c
index 433ea60..0ffb5d5 100644
--- a/drivers/scsi/isci/phy.c
+++ b/drivers/scsi/isci/phy.c
@@ -506,17 +506,461 @@
}
/**
- * This method will process the event code received.
+ * This method will give the phy permission to consume power
* @sci_phy:
- * @event_code:
*
* enum sci_status
*/
-enum sci_status scic_sds_phy_event_handler(
- struct scic_sds_phy *sci_phy,
- u32 event_code)
+enum sci_status scic_sds_phy_consume_power_handler(
+ struct scic_sds_phy *sci_phy)
{
- return sci_phy->state_handlers->event_handler(sci_phy, event_code);
+ return sci_phy->state_handlers->consume_power_handler(sci_phy);
+}
+
+/*
+ * *****************************************************************************
+ * * SCIC SDS PHY HELPER FUNCTIONS
+ * ***************************************************************************** */
+
+
+/**
+ *
+ * @sci_phy: The phy object that received SAS PHY DETECTED.
+ *
+ * This method continues the link training for the phy as if it were a SAS PHY
+ * instead of a SATA PHY. This is done because the completion queue had a SAS
+ * PHY DETECTED event when the state machine was expecting a SATA PHY event.
+ * none
+ */
+static void scic_sds_phy_start_sas_link_training(
+ struct scic_sds_phy *sci_phy)
+{
+ u32 phy_control;
+
+ phy_control =
+ readl(&sci_phy->link_layer_registers->phy_configuration);
+ phy_control |= SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD);
+ writel(phy_control,
+ &sci_phy->link_layer_registers->phy_configuration);
+
+ sci_base_state_machine_change_state(
+ &sci_phy->state_machine,
+ SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_SPEED_EN
+ );
+
+ sci_phy->protocol = SCIC_SDS_PHY_PROTOCOL_SAS;
+}
+
+/**
+ *
+ * @sci_phy: The phy object that received a SATA SPINUP HOLD event
+ *
+ * This method continues the link training for the phy as if it were a SATA PHY
+ * instead of a SAS PHY. This is done because the completion queue had a SATA
+ * SPINUP HOLD event when the state machine was expecting a SAS PHY event. none
+ */
+static void scic_sds_phy_start_sata_link_training(
+ struct scic_sds_phy *sci_phy)
+{
+ sci_base_state_machine_change_state(
+ &sci_phy->state_machine,
+ SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER
+ );
+
+ sci_phy->protocol = SCIC_SDS_PHY_PROTOCOL_SATA;
+}
+
+/**
+ * scic_sds_phy_complete_link_training - perform processing common to
+ * all protocols upon completion of link training.
+ * @sci_phy: This parameter specifies the phy object for which link training
+ * has completed.
+ * @max_link_rate: This parameter specifies the maximum link rate to be
+ * associated with this phy.
+ * @next_state: This parameter specifies the next state for the phy's starting
+ * sub-state machine.
+ *
+ */
+static void scic_sds_phy_complete_link_training(
+ struct scic_sds_phy *sci_phy,
+ enum sas_linkrate max_link_rate,
+ u32 next_state)
+{
+ sci_phy->max_negotiated_speed = max_link_rate;
+
+ sci_base_state_machine_change_state(&sci_phy->state_machine,
+ next_state);
+}
+
+/*
+ * This method is called by the struct scic_sds_controller when the phy object is
+ * granted power. - The notify enable spinups are turned on for this phy object
+ * - The phy state machine is transitioned to the
+ * SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL. enum sci_status SCI_SUCCESS
+ */
+static enum sci_status scic_sds_phy_starting_substate_await_sas_power_consume_power_handler(
+ struct scic_sds_phy *sci_phy)
+{
+ u32 enable_spinup;
+
+ enable_spinup = readl(&sci_phy->link_layer_registers->notify_enable_spinup_control);
+ enable_spinup |= SCU_ENSPINUP_GEN_BIT(ENABLE);
+ writel(enable_spinup, &sci_phy->link_layer_registers->notify_enable_spinup_control);
+
+ /* Change state to the final state this substate machine has run to completion */
+ sci_base_state_machine_change_state(&sci_phy->state_machine,
+ SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL);
+
+ return SCI_SUCCESS;
+}
+
+/*
+ * This method is called by the struct scic_sds_controller when the phy object is
+ * granted power. - The phy state machine is transitioned to the
+ * SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN. enum sci_status SCI_SUCCESS
+ */
+static enum sci_status scic_sds_phy_starting_substate_await_sata_power_consume_power_handler(
+ struct scic_sds_phy *sci_phy)
+{
+ u32 scu_sas_pcfg_value;
+
+ /* Release the spinup hold state and reset the OOB state machine */
+ scu_sas_pcfg_value =
+ readl(&sci_phy->link_layer_registers->phy_configuration);
+ scu_sas_pcfg_value &=
+ ~(SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD) | SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE));
+ scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_RESET);
+ writel(scu_sas_pcfg_value,
+ &sci_phy->link_layer_registers->phy_configuration);
+
+ /* Now restart the OOB operation */
+ scu_sas_pcfg_value &= ~SCU_SAS_PCFG_GEN_BIT(OOB_RESET);
+ scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE);
+ writel(scu_sas_pcfg_value,
+ &sci_phy->link_layer_registers->phy_configuration);
+
+ /* Change state to the final state this substate machine has run to completion */
+ sci_base_state_machine_change_state(&sci_phy->state_machine,
+ SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN);
+
+ return SCI_SUCCESS;
+}
+
+static enum sci_status default_phy_handler(struct scic_sds_phy *sci_phy,
+ const char *func)
+{
+ dev_dbg(sciphy_to_dev(sci_phy),
+ "%s: in wrong state: %d\n", func,
+ sci_base_state_machine_get_state(&sci_phy->state_machine));
+ return SCI_FAILURE_INVALID_STATE;
+}
+
+static enum sci_status
+scic_sds_phy_default_consume_power_handler(struct scic_sds_phy *sci_phy)
+{
+ return default_phy_handler(sci_phy, __func__);
+}
+
+
+enum sci_status scic_sds_phy_event_handler(struct scic_sds_phy *sci_phy,
+ u32 event_code)
+{
+ enum scic_sds_phy_states state = sci_phy->state_machine.current_state_id;
+
+ switch (state) {
+ case SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_OSSP_EN:
+ switch (scu_get_event_code(event_code)) {
+ case SCU_EVENT_SAS_PHY_DETECTED:
+ scic_sds_phy_start_sas_link_training(sci_phy);
+ sci_phy->is_in_link_training = true;
+ break;
+ case SCU_EVENT_SATA_SPINUP_HOLD:
+ scic_sds_phy_start_sata_link_training(sci_phy);
+ sci_phy->is_in_link_training = true;
+ break;
+ default:
+ dev_dbg(sciphy_to_dev(sci_phy),
+ "%s: PHY starting substate machine received "
+ "unexpected event_code %x\n",
+ __func__,
+ event_code);
+ return SCI_FAILURE;
+ }
+ return SCI_SUCCESS;
+ case SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_SPEED_EN:
+ switch (scu_get_event_code(event_code)) {
+ case SCU_EVENT_SAS_PHY_DETECTED:
+ /*
+ * Why is this being reported again by the controller?
+ * We would re-enter this state so just stay here */
+ break;
+ case SCU_EVENT_SAS_15:
+ case SCU_EVENT_SAS_15_SSC:
+ scic_sds_phy_complete_link_training(
+ sci_phy,
+ SAS_LINK_RATE_1_5_GBPS,
+ SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF);
+ break;
+ case SCU_EVENT_SAS_30:
+ case SCU_EVENT_SAS_30_SSC:
+ scic_sds_phy_complete_link_training(
+ sci_phy,
+ SAS_LINK_RATE_3_0_GBPS,
+ SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF);
+ break;
+ case SCU_EVENT_SAS_60:
+ case SCU_EVENT_SAS_60_SSC:
+ scic_sds_phy_complete_link_training(
+ sci_phy,
+ SAS_LINK_RATE_6_0_GBPS,
+ SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF);
+ break;
+ case SCU_EVENT_SATA_SPINUP_HOLD:
+ /*
+ * We were doing SAS PHY link training and received a SATA PHY event
+ * continue OOB/SN as if this were a SATA PHY */
+ scic_sds_phy_start_sata_link_training(sci_phy);
+ break;
+ case SCU_EVENT_LINK_FAILURE:
+ /* Link failure change state back to the starting state */
+ sci_base_state_machine_change_state(&sci_phy->state_machine,
+ SCI_BASE_PHY_STATE_STARTING);
+ break;
+ default:
+ dev_warn(sciphy_to_dev(sci_phy),
+ "%s: PHY starting substate machine received "
+ "unexpected event_code %x\n",
+ __func__, event_code);
+
+ return SCI_FAILURE;
+ break;
+ }
+ return SCI_SUCCESS;
+ case SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF:
+ switch (scu_get_event_code(event_code)) {
+ case SCU_EVENT_SAS_PHY_DETECTED:
+ /* Backup the state machine */
+ scic_sds_phy_start_sas_link_training(sci_phy);
+ break;
+ case SCU_EVENT_SATA_SPINUP_HOLD:
+ /* We were doing SAS PHY link training and received a
+ * SATA PHY event continue OOB/SN as if this were a
+ * SATA PHY
+ */
+ scic_sds_phy_start_sata_link_training(sci_phy);
+ break;
+ case SCU_EVENT_RECEIVED_IDENTIFY_TIMEOUT:
+ case SCU_EVENT_LINK_FAILURE:
+ case SCU_EVENT_HARD_RESET_RECEIVED:
+ /* Start the oob/sn state machine over again */
+ sci_base_state_machine_change_state(&sci_phy->state_machine,
+ SCI_BASE_PHY_STATE_STARTING);
+ break;
+ default:
+ dev_warn(sciphy_to_dev(sci_phy),
+ "%s: PHY starting substate machine received "
+ "unexpected event_code %x\n",
+ __func__, event_code);
+ return SCI_FAILURE;
+ }
+ return SCI_SUCCESS;
+ case SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_POWER:
+ switch (scu_get_event_code(event_code)) {
+ case SCU_EVENT_LINK_FAILURE:
+ /* Link failure change state back to the starting state */
+ sci_base_state_machine_change_state(&sci_phy->state_machine,
+ SCI_BASE_PHY_STATE_STARTING);
+ break;
+ default:
+ dev_warn(sciphy_to_dev(sci_phy),
+ "%s: PHY starting substate machine received unexpected "
+ "event_code %x\n",
+ __func__,
+ event_code);
+ return SCI_FAILURE;
+ }
+ return SCI_SUCCESS;
+ case SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER:
+ switch (scu_get_event_code(event_code)) {
+ case SCU_EVENT_LINK_FAILURE:
+ /* Link failure change state back to the starting state */
+ sci_base_state_machine_change_state(&sci_phy->state_machine,
+ SCI_BASE_PHY_STATE_STARTING);
+ break;
+ case SCU_EVENT_SATA_SPINUP_HOLD:
+ /* These events are received every 10ms and are
+ * expected while in this state
+ */
+ break;
+
+ case SCU_EVENT_SAS_PHY_DETECTED:
+ /* There has been a change in the phy type before OOB/SN for the
+ * SATA finished start down the SAS link traning path.
+ */
+ scic_sds_phy_start_sas_link_training(sci_phy);
+ break;
+
+ default:
+ dev_warn(sciphy_to_dev(sci_phy),
+ "%s: PHY starting substate machine received "
+ "unexpected event_code %x\n",
+ __func__, event_code);
+
+ return SCI_FAILURE;
+ }
+ return SCI_SUCCESS;
+ case SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN:
+ switch (scu_get_event_code(event_code)) {
+ case SCU_EVENT_LINK_FAILURE:
+ /* Link failure change state back to the starting state */
+ sci_base_state_machine_change_state(&sci_phy->state_machine,
+ SCI_BASE_PHY_STATE_STARTING);
+ break;
+ case SCU_EVENT_SATA_SPINUP_HOLD:
+ /* These events might be received since we dont know how many may be in
+ * the completion queue while waiting for power
+ */
+ break;
+ case SCU_EVENT_SATA_PHY_DETECTED:
+ sci_phy->protocol = SCIC_SDS_PHY_PROTOCOL_SATA;
+
+ /* We have received the SATA PHY notification change state */
+ sci_base_state_machine_change_state(&sci_phy->state_machine,
+ SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN);
+ break;
+ case SCU_EVENT_SAS_PHY_DETECTED:
+ /* There has been a change in the phy type before OOB/SN for the
+ * SATA finished start down the SAS link traning path.
+ */
+ scic_sds_phy_start_sas_link_training(sci_phy);
+ break;
+ default:
+ dev_warn(sciphy_to_dev(sci_phy),
+ "%s: PHY starting substate machine received "
+ "unexpected event_code %x\n",
+ __func__,
+ event_code);
+
+ return SCI_FAILURE;;
+ }
+ return SCI_SUCCESS;
+ case SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN:
+ switch (scu_get_event_code(event_code)) {
+ case SCU_EVENT_SATA_PHY_DETECTED:
+ /*
+ * The hardware reports multiple SATA PHY detected events
+ * ignore the extras */
+ break;
+ case SCU_EVENT_SATA_15:
+ case SCU_EVENT_SATA_15_SSC:
+ scic_sds_phy_complete_link_training(
+ sci_phy,
+ SAS_LINK_RATE_1_5_GBPS,
+ SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF);
+ break;
+ case SCU_EVENT_SATA_30:
+ case SCU_EVENT_SATA_30_SSC:
+ scic_sds_phy_complete_link_training(
+ sci_phy,
+ SAS_LINK_RATE_3_0_GBPS,
+ SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF);
+ break;
+ case SCU_EVENT_SATA_60:
+ case SCU_EVENT_SATA_60_SSC:
+ scic_sds_phy_complete_link_training(
+ sci_phy,
+ SAS_LINK_RATE_6_0_GBPS,
+ SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF);
+ break;
+ case SCU_EVENT_LINK_FAILURE:
+ /* Link failure change state back to the starting state */
+ sci_base_state_machine_change_state(&sci_phy->state_machine,
+ SCI_BASE_PHY_STATE_STARTING);
+ break;
+ case SCU_EVENT_SAS_PHY_DETECTED:
+ /*
+ * There has been a change in the phy type before OOB/SN for the
+ * SATA finished start down the SAS link traning path. */
+ scic_sds_phy_start_sas_link_training(sci_phy);
+ break;
+ default:
+ dev_warn(sciphy_to_dev(sci_phy),
+ "%s: PHY starting substate machine received "
+ "unexpected event_code %x\n",
+ __func__, event_code);
+
+ return SCI_FAILURE;
+ }
+
+ return SCI_SUCCESS;
+ case SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF:
+ switch (scu_get_event_code(event_code)) {
+ case SCU_EVENT_SATA_PHY_DETECTED:
+ /* Backup the state machine */
+ sci_base_state_machine_change_state(&sci_phy->state_machine,
+ SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN);
+ break;
+
+ case SCU_EVENT_LINK_FAILURE:
+ /* Link failure change state back to the starting state */
+ sci_base_state_machine_change_state(&sci_phy->state_machine,
+ SCI_BASE_PHY_STATE_STARTING);
+ break;
+
+ default:
+ dev_warn(sciphy_to_dev(sci_phy),
+ "%s: PHY starting substate machine received "
+ "unexpected event_code %x\n",
+ __func__,
+ event_code);
+
+ return SCI_FAILURE;
+ }
+ return SCI_SUCCESS;
+ case SCI_BASE_PHY_STATE_READY:
+ switch (scu_get_event_code(event_code)) {
+ case SCU_EVENT_LINK_FAILURE:
+ /* Link failure change state back to the starting state */
+ sci_base_state_machine_change_state(&sci_phy->state_machine,
+ SCI_BASE_PHY_STATE_STARTING);
+ break;
+ case SCU_EVENT_BROADCAST_CHANGE:
+ /* Broadcast change received. Notify the port. */
+ if (scic_sds_phy_get_port(sci_phy) != NULL)
+ scic_sds_port_broadcast_change_received(sci_phy->owning_port, sci_phy);
+ else
+ sci_phy->bcn_received_while_port_unassigned = true;
+ break;
+ default:
+ dev_warn(sciphy_to_dev(sci_phy),
+ "%sP SCIC PHY 0x%p ready state machine received "
+ "unexpected event_code %x\n",
+ __func__, sci_phy, event_code);
+ return SCI_FAILURE_INVALID_STATE;
+ }
+ return SCI_SUCCESS;
+ case SCI_BASE_PHY_STATE_RESETTING:
+ switch (scu_get_event_code(event_code)) {
+ case SCU_EVENT_HARD_RESET_TRANSMITTED:
+ /* Link failure change state back to the starting state */
+ sci_base_state_machine_change_state(&sci_phy->state_machine,
+ SCI_BASE_PHY_STATE_STARTING);
+ break;
+ default:
+ dev_warn(sciphy_to_dev(sci_phy),
+ "%s: SCIC PHY 0x%p resetting state machine received "
+ "unexpected event_code %x\n",
+ __func__, sci_phy, event_code);
+
+ return SCI_FAILURE_INVALID_STATE;
+ break;
+ }
+ return SCI_SUCCESS;
+ default:
+ dev_dbg(sciphy_to_dev(sci_phy),
+ "%s: in wrong state: %d\n", __func__, state);
+ return SCI_FAILURE_INVALID_STATE;
+ }
}
enum sci_status scic_sds_phy_frame_handler(struct scic_sds_phy *sci_phy,
@@ -615,754 +1059,57 @@
}
-/**
- * This method will give the phy permission to consume power
- * @sci_phy:
- *
- * enum sci_status
- */
-enum sci_status scic_sds_phy_consume_power_handler(
- struct scic_sds_phy *sci_phy)
-{
- return sci_phy->state_handlers->consume_power_handler(sci_phy);
-}
-
-/*
- * *****************************************************************************
- * * SCIC SDS PHY HELPER FUNCTIONS
- * ***************************************************************************** */
-
-
-/**
- *
- * @sci_phy: The phy object that received SAS PHY DETECTED.
- *
- * This method continues the link training for the phy as if it were a SAS PHY
- * instead of a SATA PHY. This is done because the completion queue had a SAS
- * PHY DETECTED event when the state machine was expecting a SATA PHY event.
- * none
- */
-static void scic_sds_phy_start_sas_link_training(
- struct scic_sds_phy *sci_phy)
-{
- u32 phy_control;
-
- phy_control =
- readl(&sci_phy->link_layer_registers->phy_configuration);
- phy_control |= SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD);
- writel(phy_control,
- &sci_phy->link_layer_registers->phy_configuration);
-
- sci_base_state_machine_change_state(
- &sci_phy->state_machine,
- SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_SPEED_EN
- );
-
- sci_phy->protocol = SCIC_SDS_PHY_PROTOCOL_SAS;
-}
-
-/**
- *
- * @sci_phy: The phy object that received a SATA SPINUP HOLD event
- *
- * This method continues the link training for the phy as if it were a SATA PHY
- * instead of a SAS PHY. This is done because the completion queue had a SATA
- * SPINUP HOLD event when the state machine was expecting a SAS PHY event. none
- */
-static void scic_sds_phy_start_sata_link_training(
- struct scic_sds_phy *sci_phy)
-{
- sci_base_state_machine_change_state(
- &sci_phy->state_machine,
- SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER
- );
-
- sci_phy->protocol = SCIC_SDS_PHY_PROTOCOL_SATA;
-}
-
-/**
- * scic_sds_phy_complete_link_training - perform processing common to
- * all protocols upon completion of link training.
- * @sci_phy: This parameter specifies the phy object for which link training
- * has completed.
- * @max_link_rate: This parameter specifies the maximum link rate to be
- * associated with this phy.
- * @next_state: This parameter specifies the next state for the phy's starting
- * sub-state machine.
- *
- */
-static void scic_sds_phy_complete_link_training(
- struct scic_sds_phy *sci_phy,
- enum sas_linkrate max_link_rate,
- u32 next_state)
-{
- sci_phy->max_negotiated_speed = max_link_rate;
-
- sci_base_state_machine_change_state(&sci_phy->state_machine,
- next_state);
-}
-
-static void scic_sds_phy_restart_starting_state(
- struct scic_sds_phy *sci_phy)
-{
- /* Re-enter the base state machine starting state */
- sci_base_state_machine_change_state(&sci_phy->state_machine,
- SCI_BASE_PHY_STATE_STARTING);
-}
-
-/**
- *
- * @phy: This struct scic_sds_phy object which has received an event.
- * @event_code: This is the event code which the phy object is to decode.
- *
- * This method is called when an event notification is received for the phy
- * object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SPEED_EN. -
- * decode the event - sas phy detected causes a state transition to the wait
- * for speed event notification. - any other events log a warning message and
- * set a failure status enum sci_status SCI_SUCCESS on any valid event notification
- * SCI_FAILURE on any unexpected event notifation
- */
-static enum sci_status scic_sds_phy_starting_substate_await_ossp_event_handler(
- struct scic_sds_phy *sci_phy,
- u32 event_code)
-{
- u32 result = SCI_SUCCESS;
-
- switch (scu_get_event_code(event_code)) {
- case SCU_EVENT_SAS_PHY_DETECTED:
- scic_sds_phy_start_sas_link_training(sci_phy);
- sci_phy->is_in_link_training = true;
- break;
-
- case SCU_EVENT_SATA_SPINUP_HOLD:
- scic_sds_phy_start_sata_link_training(sci_phy);
- sci_phy->is_in_link_training = true;
- break;
-
- default:
- dev_dbg(sciphy_to_dev(sci_phy),
- "%s: PHY starting substate machine received "
- "unexpected event_code %x\n",
- __func__,
- event_code);
-
- result = SCI_FAILURE;
- break;
- }
-
- return result;
-}
-
-/**
- *
- * @phy: This struct scic_sds_phy object which has received an event.
- * @event_code: This is the event code which the phy object is to decode.
- *
- * This method is called when an event notification is received for the phy
- * object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SPEED_EN. -
- * decode the event - sas phy detected returns us back to this state. - speed
- * event detected causes a state transition to the wait for iaf. - identify
- * timeout is an un-expected event and the state machine is restarted. - link
- * failure events restart the starting state machine - any other events log a
- * warning message and set a failure status enum sci_status SCI_SUCCESS on any valid
- * event notification SCI_FAILURE on any unexpected event notifation
- */
-static enum sci_status scic_sds_phy_starting_substate_await_sas_phy_speed_event_handler(
- struct scic_sds_phy *sci_phy,
- u32 event_code)
-{
- u32 result = SCI_SUCCESS;
-
- switch (scu_get_event_code(event_code)) {
- case SCU_EVENT_SAS_PHY_DETECTED:
- /*
- * Why is this being reported again by the controller?
- * We would re-enter this state so just stay here */
- break;
-
- case SCU_EVENT_SAS_15:
- case SCU_EVENT_SAS_15_SSC:
- scic_sds_phy_complete_link_training(
- sci_phy,
- SAS_LINK_RATE_1_5_GBPS,
- SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF);
- break;
-
- case SCU_EVENT_SAS_30:
- case SCU_EVENT_SAS_30_SSC:
- scic_sds_phy_complete_link_training(
- sci_phy,
- SAS_LINK_RATE_3_0_GBPS,
- SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF);
- break;
-
- case SCU_EVENT_SAS_60:
- case SCU_EVENT_SAS_60_SSC:
- scic_sds_phy_complete_link_training(
- sci_phy,
- SAS_LINK_RATE_6_0_GBPS,
- SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF);
- break;
-
- case SCU_EVENT_SATA_SPINUP_HOLD:
- /*
- * We were doing SAS PHY link training and received a SATA PHY event
- * continue OOB/SN as if this were a SATA PHY */
- scic_sds_phy_start_sata_link_training(sci_phy);
- break;
-
- case SCU_EVENT_LINK_FAILURE:
- /* Link failure change state back to the starting state */
- scic_sds_phy_restart_starting_state(sci_phy);
- break;
-
- default:
- dev_warn(sciphy_to_dev(sci_phy),
- "%s: PHY starting substate machine received "
- "unexpected event_code %x\n",
- __func__,
- event_code);
-
- result = SCI_FAILURE;
- break;
- }
-
- return result;
-}
-
-/**
- *
- * @phy: This struct scic_sds_phy object which has received an event.
- * @event_code: This is the event code which the phy object is to decode.
- *
- * This method is called when an event notification is received for the phy
- * object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF. -
- * decode the event - sas phy detected event backs up the state machine to the
- * await speed notification. - identify timeout is an un-expected event and the
- * state machine is restarted. - link failure events restart the starting state
- * machine - any other events log a warning message and set a failure status
- * enum sci_status SCI_SUCCESS on any valid event notification SCI_FAILURE on any
- * unexpected event notifation
- */
-static enum sci_status scic_sds_phy_starting_substate_await_iaf_uf_event_handler(
- struct scic_sds_phy *sci_phy,
- u32 event_code)
-{
- u32 result = SCI_SUCCESS;
-
- switch (scu_get_event_code(event_code)) {
- case SCU_EVENT_SAS_PHY_DETECTED:
- /* Backup the state machine */
- scic_sds_phy_start_sas_link_training(sci_phy);
- break;
-
- case SCU_EVENT_SATA_SPINUP_HOLD:
- /*
- * We were doing SAS PHY link training and received a SATA PHY event
- * continue OOB/SN as if this were a SATA PHY */
- scic_sds_phy_start_sata_link_training(sci_phy);
- break;
-
- case SCU_EVENT_RECEIVED_IDENTIFY_TIMEOUT:
- case SCU_EVENT_LINK_FAILURE:
- case SCU_EVENT_HARD_RESET_RECEIVED:
- /* Start the oob/sn state machine over again */
- scic_sds_phy_restart_starting_state(sci_phy);
- break;
-
- default:
- dev_warn(sciphy_to_dev(sci_phy),
- "%s: PHY starting substate machine received "
- "unexpected event_code %x\n",
- __func__,
- event_code);
-
- result = SCI_FAILURE;
- break;
- }
-
- return result;
-}
-
-/**
- *
- * @phy: This struct scic_sds_phy object which has received an event.
- * @event_code: This is the event code which the phy object is to decode.
- *
- * This method is called when an event notification is received for the phy
- * object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_POWER. -
- * decode the event - link failure events restart the starting state machine -
- * any other events log a warning message and set a failure status enum sci_status
- * SCI_SUCCESS on a link failure event SCI_FAILURE on any unexpected event
- * notifation
- */
-static enum sci_status scic_sds_phy_starting_substate_await_sas_power_event_handler(
- struct scic_sds_phy *sci_phy,
- u32 event_code)
-{
- u32 result = SCI_SUCCESS;
-
- switch (scu_get_event_code(event_code)) {
- case SCU_EVENT_LINK_FAILURE:
- /* Link failure change state back to the starting state */
- scic_sds_phy_restart_starting_state(sci_phy);
- break;
-
- default:
- dev_warn(sciphy_to_dev(sci_phy),
- "%s: PHY starting substate machine received unexpected "
- "event_code %x\n",
- __func__,
- event_code);
-
- result = SCI_FAILURE;
- break;
- }
-
- return result;
-}
-
-/**
- *
- * @phy: This struct scic_sds_phy object which has received an event.
- * @event_code: This is the event code which the phy object is to decode.
- *
- * This method is called when an event notification is received for the phy
- * object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER. -
- * decode the event - link failure events restart the starting state machine -
- * sata spinup hold events are ignored since they are expected - any other
- * events log a warning message and set a failure status enum sci_status SCI_SUCCESS
- * on a link failure event SCI_FAILURE on any unexpected event notifation
- */
-static enum sci_status scic_sds_phy_starting_substate_await_sata_power_event_handler(
- struct scic_sds_phy *sci_phy,
- u32 event_code)
-{
- u32 result = SCI_SUCCESS;
-
- switch (scu_get_event_code(event_code)) {
- case SCU_EVENT_LINK_FAILURE:
- /* Link failure change state back to the starting state */
- scic_sds_phy_restart_starting_state(sci_phy);
- break;
-
- case SCU_EVENT_SATA_SPINUP_HOLD:
- /* These events are received every 10ms and are expected while in this state */
- break;
-
- case SCU_EVENT_SAS_PHY_DETECTED:
- /*
- * There has been a change in the phy type before OOB/SN for the
- * SATA finished start down the SAS link traning path. */
- scic_sds_phy_start_sas_link_training(sci_phy);
- break;
-
- default:
- dev_warn(sciphy_to_dev(sci_phy),
- "%s: PHY starting substate machine received "
- "unexpected event_code %x\n",
- __func__,
- event_code);
-
- result = SCI_FAILURE;
- break;
- }
-
- return result;
-}
-
-/**
- * scic_sds_phy_starting_substate_await_sata_phy_event_handler -
- * @phy: This struct scic_sds_phy object which has received an event.
- * @event_code: This is the event code which the phy object is to decode.
- *
- * This method is called when an event notification is received for the phy
- * object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN. -
- * decode the event - link failure events restart the starting state machine -
- * sata spinup hold events are ignored since they are expected - sata phy
- * detected event change to the wait speed event - any other events log a
- * warning message and set a failure status enum sci_status SCI_SUCCESS on a link
- * failure event SCI_FAILURE on any unexpected event notifation
- */
-static enum sci_status scic_sds_phy_starting_substate_await_sata_phy_event_handler(
- struct scic_sds_phy *sci_phy, u32 event_code)
-{
- u32 result = SCI_SUCCESS;
-
- switch (scu_get_event_code(event_code)) {
- case SCU_EVENT_LINK_FAILURE:
- /* Link failure change state back to the starting state */
- scic_sds_phy_restart_starting_state(sci_phy);
- break;
-
- case SCU_EVENT_SATA_SPINUP_HOLD:
- /* These events might be received since we dont know how many may be in
- * the completion queue while waiting for power
- */
- break;
-
- case SCU_EVENT_SATA_PHY_DETECTED:
- sci_phy->protocol = SCIC_SDS_PHY_PROTOCOL_SATA;
-
- /* We have received the SATA PHY notification change state */
- sci_base_state_machine_change_state(&sci_phy->state_machine,
- SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN);
- break;
-
- case SCU_EVENT_SAS_PHY_DETECTED:
- /* There has been a change in the phy type before OOB/SN for the
- * SATA finished start down the SAS link traning path.
- */
- scic_sds_phy_start_sas_link_training(sci_phy);
- break;
-
- default:
- dev_warn(sciphy_to_dev(sci_phy),
- "%s: PHY starting substate machine received "
- "unexpected event_code %x\n",
- __func__,
- event_code);
-
- result = SCI_FAILURE;
- break;
- }
-
- return result;
-}
-
-/**
- *
- * @phy: This struct scic_sds_phy object which has received an event.
- * @event_code: This is the event code which the phy object is to decode.
- *
- * This method is called when an event notification is received for the phy
- * object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN.
- * - decode the event - sata phy detected returns us back to this state. -
- * speed event detected causes a state transition to the wait for signature. -
- * link failure events restart the starting state machine - any other events
- * log a warning message and set a failure status enum sci_status SCI_SUCCESS on any
- * valid event notification SCI_FAILURE on any unexpected event notifation
- */
-static enum sci_status scic_sds_phy_starting_substate_await_sata_speed_event_handler(
- struct scic_sds_phy *sci_phy,
- u32 event_code)
-{
- u32 result = SCI_SUCCESS;
-
- switch (scu_get_event_code(event_code)) {
- case SCU_EVENT_SATA_PHY_DETECTED:
- /*
- * The hardware reports multiple SATA PHY detected events
- * ignore the extras */
- break;
-
- case SCU_EVENT_SATA_15:
- case SCU_EVENT_SATA_15_SSC:
- scic_sds_phy_complete_link_training(
- sci_phy,
- SAS_LINK_RATE_1_5_GBPS,
- SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF);
- break;
-
- case SCU_EVENT_SATA_30:
- case SCU_EVENT_SATA_30_SSC:
- scic_sds_phy_complete_link_training(
- sci_phy,
- SAS_LINK_RATE_3_0_GBPS,
- SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF);
- break;
-
- case SCU_EVENT_SATA_60:
- case SCU_EVENT_SATA_60_SSC:
- scic_sds_phy_complete_link_training(
- sci_phy,
- SAS_LINK_RATE_6_0_GBPS,
- SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF);
- break;
-
- case SCU_EVENT_LINK_FAILURE:
- /* Link failure change state back to the starting state */
- scic_sds_phy_restart_starting_state(sci_phy);
- break;
-
- case SCU_EVENT_SAS_PHY_DETECTED:
- /*
- * There has been a change in the phy type before OOB/SN for the
- * SATA finished start down the SAS link traning path. */
- scic_sds_phy_start_sas_link_training(sci_phy);
- break;
-
- default:
- dev_warn(sciphy_to_dev(sci_phy),
- "%s: PHY starting substate machine received "
- "unexpected event_code %x\n",
- __func__,
- event_code);
-
- result = SCI_FAILURE;
- break;
- }
-
- return result;
-}
-
-/**
- * scic_sds_phy_starting_substate_await_sig_fis_event_handler -
- * @phy: This struct scic_sds_phy object which has received an event.
- * @event_code: This is the event code which the phy object is to decode.
- *
- * This method is called when an event notification is received for the phy
- * object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF. -
- * decode the event - sas phy detected event backs up the state machine to the
- * await speed notification. - identify timeout is an un-expected event and the
- * state machine is restarted. - link failure events restart the starting state
- * machine - any other events log a warning message and set a failure status
- * enum sci_status SCI_SUCCESS on any valid event notification SCI_FAILURE on any
- * unexpected event notifation
- */
-static enum sci_status scic_sds_phy_starting_substate_await_sig_fis_event_handler(
- struct scic_sds_phy *sci_phy, u32 event_code)
-{
- u32 result = SCI_SUCCESS;
-
- switch (scu_get_event_code(event_code)) {
- case SCU_EVENT_SATA_PHY_DETECTED:
- /* Backup the state machine */
- sci_base_state_machine_change_state(&sci_phy->state_machine,
- SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN);
- break;
-
- case SCU_EVENT_LINK_FAILURE:
- /* Link failure change state back to the starting state */
- scic_sds_phy_restart_starting_state(sci_phy);
- break;
-
- default:
- dev_warn(sciphy_to_dev(sci_phy),
- "%s: PHY starting substate machine received "
- "unexpected event_code %x\n",
- __func__,
- event_code);
-
- result = SCI_FAILURE;
- break;
- }
-
- return result;
-}
-
-/*
- * This method is called by the struct scic_sds_controller when the phy object is
- * granted power. - The notify enable spinups are turned on for this phy object
- * - The phy state machine is transitioned to the
- * SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL. enum sci_status SCI_SUCCESS
- */
-static enum sci_status scic_sds_phy_starting_substate_await_sas_power_consume_power_handler(
- struct scic_sds_phy *sci_phy)
-{
- u32 enable_spinup;
-
- enable_spinup = readl(&sci_phy->link_layer_registers->notify_enable_spinup_control);
- enable_spinup |= SCU_ENSPINUP_GEN_BIT(ENABLE);
- writel(enable_spinup, &sci_phy->link_layer_registers->notify_enable_spinup_control);
-
- /* Change state to the final state this substate machine has run to completion */
- sci_base_state_machine_change_state(&sci_phy->state_machine,
- SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL);
-
- return SCI_SUCCESS;
-}
-
-/*
- * This method is called by the struct scic_sds_controller when the phy object is
- * granted power. - The phy state machine is transitioned to the
- * SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN. enum sci_status SCI_SUCCESS
- */
-static enum sci_status scic_sds_phy_starting_substate_await_sata_power_consume_power_handler(
- struct scic_sds_phy *sci_phy)
-{
- u32 scu_sas_pcfg_value;
-
- /* Release the spinup hold state and reset the OOB state machine */
- scu_sas_pcfg_value =
- readl(&sci_phy->link_layer_registers->phy_configuration);
- scu_sas_pcfg_value &=
- ~(SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD) | SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE));
- scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_RESET);
- writel(scu_sas_pcfg_value,
- &sci_phy->link_layer_registers->phy_configuration);
-
- /* Now restart the OOB operation */
- scu_sas_pcfg_value &= ~SCU_SAS_PCFG_GEN_BIT(OOB_RESET);
- scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE);
- writel(scu_sas_pcfg_value,
- &sci_phy->link_layer_registers->phy_configuration);
-
- /* Change state to the final state this substate machine has run to completion */
- sci_base_state_machine_change_state(&sci_phy->state_machine,
- SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN);
-
- return SCI_SUCCESS;
-}
-
-static enum sci_status default_phy_handler(struct scic_sds_phy *sci_phy,
- const char *func)
-{
- dev_dbg(sciphy_to_dev(sci_phy),
- "%s: in wrong state: %d\n", func,
- sci_base_state_machine_get_state(&sci_phy->state_machine));
- return SCI_FAILURE_INVALID_STATE;
-}
-
-static enum sci_status
-scic_sds_phy_default_event_handler(struct scic_sds_phy *sci_phy,
- u32 event_code)
-{
- return default_phy_handler(sci_phy, __func__);
-}
-
-static enum sci_status
-scic_sds_phy_default_consume_power_handler(struct scic_sds_phy *sci_phy)
-{
- return default_phy_handler(sci_phy, __func__);
-}
-
-/**
- * scic_sds_phy_ready_state_event_handler -
- * @phy: This is the struct scic_sds_phy object which has received the event.
- *
- * This method request the struct scic_sds_phy handle the received event. The only
- * event that we are interested in while in the ready state is the link failure
- * event. - decoded event is a link failure - transition the struct scic_sds_phy back
- * to the SCI_BASE_PHY_STATE_STARTING state. - any other event received will
- * report a warning message enum sci_status SCI_SUCCESS if the event received is a
- * link failure SCI_FAILURE_INVALID_STATE for any other event received.
- */
-static enum sci_status scic_sds_phy_ready_state_event_handler(struct scic_sds_phy *sci_phy,
- u32 event_code)
-{
- enum sci_status result = SCI_FAILURE;
-
- switch (scu_get_event_code(event_code)) {
- case SCU_EVENT_LINK_FAILURE:
- /* Link failure change state back to the starting state */
- sci_base_state_machine_change_state(&sci_phy->state_machine,
- SCI_BASE_PHY_STATE_STARTING);
- result = SCI_SUCCESS;
- break;
-
- case SCU_EVENT_BROADCAST_CHANGE:
- /* Broadcast change received. Notify the port. */
- if (scic_sds_phy_get_port(sci_phy) != NULL)
- scic_sds_port_broadcast_change_received(sci_phy->owning_port, sci_phy);
- else
- sci_phy->bcn_received_while_port_unassigned = true;
- break;
-
- default:
- dev_warn(sciphy_to_dev(sci_phy),
- "%sP SCIC PHY 0x%p ready state machine received "
- "unexpected event_code %x\n",
- __func__, sci_phy, event_code);
-
- result = SCI_FAILURE_INVALID_STATE;
- break;
- }
-
- return result;
-}
-
-static enum sci_status scic_sds_phy_resetting_state_event_handler(struct scic_sds_phy *sci_phy,
- u32 event_code)
-{
- enum sci_status result = SCI_FAILURE;
-
- switch (scu_get_event_code(event_code)) {
- case SCU_EVENT_HARD_RESET_TRANSMITTED:
- /* Link failure change state back to the starting state */
- sci_base_state_machine_change_state(&sci_phy->state_machine,
- SCI_BASE_PHY_STATE_STARTING);
- result = SCI_SUCCESS;
- break;
-
- default:
- dev_warn(sciphy_to_dev(sci_phy),
- "%s: SCIC PHY 0x%p resetting state machine received "
- "unexpected event_code %x\n",
- __func__, sci_phy, event_code);
-
- result = SCI_FAILURE_INVALID_STATE;
- break;
- }
- return result;
-}
/* --------------------------------------------------------------------------- */
static const struct scic_sds_phy_state_handler scic_sds_phy_state_handler_table[] = {
[SCI_BASE_PHY_STATE_INITIAL] = {
- .event_handler = scic_sds_phy_default_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCI_BASE_PHY_STATE_STOPPED] = {
- .event_handler = scic_sds_phy_default_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCI_BASE_PHY_STATE_STARTING] = {
- .event_handler = scic_sds_phy_default_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_INITIAL] = {
- .event_handler = scic_sds_phy_default_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_OSSP_EN] = {
- .event_handler = scic_sds_phy_starting_substate_await_ossp_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_SPEED_EN] = {
- .event_handler = scic_sds_phy_starting_substate_await_sas_phy_speed_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF] = {
- .event_handler = scic_sds_phy_starting_substate_await_iaf_uf_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_POWER] = {
- .event_handler = scic_sds_phy_starting_substate_await_sas_power_event_handler,
.consume_power_handler = scic_sds_phy_starting_substate_await_sas_power_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER] = {
- .event_handler = scic_sds_phy_starting_substate_await_sata_power_event_handler,
.consume_power_handler = scic_sds_phy_starting_substate_await_sata_power_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN] = {
- .event_handler = scic_sds_phy_starting_substate_await_sata_phy_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN] = {
- .event_handler = scic_sds_phy_starting_substate_await_sata_speed_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF] = {
- .event_handler = scic_sds_phy_starting_substate_await_sig_fis_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL] = {
- .event_handler = scic_sds_phy_default_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCI_BASE_PHY_STATE_READY] = {
- .event_handler = scic_sds_phy_ready_state_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCI_BASE_PHY_STATE_RESETTING] = {
- .event_handler = scic_sds_phy_resetting_state_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCI_BASE_PHY_STATE_FINAL] = {
- .event_handler = scic_sds_phy_default_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
}
};
