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isci: merge phy substates

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Merged states and substates into one state machine, as we always
unconditionally transitioned to the substate machine it was straightforward to
enter that substate from the starting state.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Adam Gruchala <adam.gruchala@intel.com>
[fixed construction, starting_state_enter, and starting check]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Adam Gruchala 2011-05-10 23:54:23 +00:00 committed by Dan Williams
parent 79e2b6b276
commit 4a33c525f0
3 changed files with 491 additions and 514 deletions
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24
drivers/scsi/isci/host.c
View file

@ -932,6 +932,28 @@ static void scic_sds_controller_phy_timer_start(struct scic_sds_controller *scic
scic->phy_startup_timer_pending = true;
}
static bool is_phy_starting(struct scic_sds_phy *sci_phy)
{
enum scic_sds_phy_states state;
state = sci_phy->state_machine.current_state_id;
switch (state) {
case SCI_BASE_PHY_STATE_STARTING:
case SCIC_SDS_PHY_STARTING_SUBSTATE_INITIAL:
case SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_SPEED_EN:
case SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF:
case SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_POWER:
case SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER:
case SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN:
case SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN:
case SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF:
case SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL:
return true;
default:
return false;
}
}
/**
* scic_sds_controller_start_next_phy - start phy
* @scic: controller
@ -975,7 +997,7 @@ static enum sci_status scic_sds_controller_start_next_phy(struct scic_sds_contro
(sci_phy->is_in_link_training == false &&
state == SCI_BASE_PHY_STATE_STOPPED) ||
(sci_phy->is_in_link_training == true &&
state == SCI_BASE_PHY_STATE_STARTING)) {
is_phy_starting(sci_phy))) {
is_controller_start_complete = false;
break;
}

930
drivers/scsi/isci/phy.c
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File diff suppressed because it is too large Load diff

51
drivers/scsi/isci/phy.h
View file

@ -142,8 +142,6 @@ struct scic_sds_phy {
const struct scic_sds_phy_state_handler *state_handlers;
struct sci_base_state_machine starting_substate_machine;
/**
* This field is the pointer to the transport layer register for the SCU
* hardware.
@ -435,34 +433,6 @@ enum scic_sds_phy_states {
*/
SCI_BASE_PHY_STATE_STARTING,
/**
* This state indicates the the phy is now ready. Thus, the user
* is able to perform IO operations utilizing this phy as long as it
* is currently part of a valid port.
* This state is entered from the STARTING state.
*/
SCI_BASE_PHY_STATE_READY,
/**
* This state indicates that the phy is in the process of being reset.
* In this state no new IO operations are permitted on this phy.
* This state is entered from the READY state.
*/
SCI_BASE_PHY_STATE_RESETTING,
/**
* Simply the final state for the base phy state machine.
*/
SCI_BASE_PHY_STATE_FINAL,
};
/**
* enum scic_sds_phy_starting_substates -
*
*
*/
enum scic_sds_phy_starting_substates {
/**
* Initial state
*/
@ -512,8 +482,27 @@ enum scic_sds_phy_starting_substates {
* Exit state for this state machine
*/
SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL,
};
/**
* This state indicates the the phy is now ready. Thus, the user
* is able to perform IO operations utilizing this phy as long as it
* is currently part of a valid port.
* This state is entered from the STARTING state.
*/
SCI_BASE_PHY_STATE_READY,
/**
* This state indicates that the phy is in the process of being reset.
* In this state no new IO operations are permitted on this phy.
* This state is entered from the READY state.
*/
SCI_BASE_PHY_STATE_RESETTING,
/**
* Simply the final state for the base phy state machine.
*/
SCI_BASE_PHY_STATE_FINAL,
};
typedef enum sci_status (*scic_sds_phy_handler_t)(struct scic_sds_phy *);