diff options
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/isci/port.c | 241 | ||||
| -rw-r--r-- | drivers/scsi/isci/port.h | 14 |
2 files changed, 76 insertions, 179 deletions
diff --git a/drivers/scsi/isci/port.c b/drivers/scsi/isci/port.c index d58001cb0bcf..61ba37da437d 100644 --- a/drivers/scsi/isci/port.c +++ b/drivers/scsi/isci/port.c @@ -929,36 +929,6 @@ bool scic_sds_port_link_detected( } /** - * This method is the entry point for the phy to inform the port that it is now - * in a ready state - * @sci_port: - * - * - */ -void scic_sds_port_link_up( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - sci_phy->is_in_link_training = false; - - sci_port->state_handlers->link_up_handler(sci_port, sci_phy); -} - -/** - * This method is the entry point for the phy to inform the port that it is no - * longer in a ready state - * @sci_port: - * - * - */ -void scic_sds_port_link_down( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - sci_port->state_handlers->link_down_handler(sci_port, sci_phy); -} - -/** * This method is called to start an IO request on this port. * @sci_port: * @sci_dev: @@ -1135,29 +1105,6 @@ static enum sci_status scic_sds_port_ready_substate_complete_io_handler( return SCI_SUCCESS; } -/** - * - * @sci_port: This is the struct scic_sds_port object that which has a phy that has - * gone link up. - * @sci_phy: This is the struct scic_sds_phy object that has gone link up. - * - * This method is the ready waiting substate link up handler for the - * struct scic_sds_port object. This methos will report the link up condition for - * this port and will transition to the ready operational substate. none - */ -static void scic_sds_port_ready_waiting_substate_link_up_handler( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - /* - * Since this is the first phy going link up for the port we can just enable - * it and continue. */ - scic_sds_port_activate_phy(sci_port, sci_phy, true); - - port_state_machine_change(sci_port, - SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); -} - /* * This method is the ready waiting substate start io handler for the * struct scic_sds_port object. The port object can not accept new requests so the @@ -1171,49 +1118,6 @@ static enum sci_status scic_sds_port_ready_waiting_substate_start_io_handler( return SCI_FAILURE_INVALID_STATE; } -/** - * scic_sds_port_ready_operational_substate_link_up_handler() - - * @sci_port: This is the struct scic_sds_port object that which has a phy that has - * gone link up. - * @sci_phy: This is the struct scic_sds_phy object that has gone link up. - * - * This method is the ready operational substate link up handler for the - * struct scic_sds_port object. This function notifies the SCI User that the phy has - * gone link up. none - */ -static void scic_sds_port_ready_operational_substate_link_up_handler( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - scic_sds_port_general_link_up_handler(sci_port, sci_phy, true); -} - -/** - * scic_sds_port_ready_operational_substate_link_down_handler() - - * @sci_port: This is the struct scic_sds_port object that which has a phy that has - * gone link down. - * @sci_phy: This is the struct scic_sds_phy object that has gone link down. - * - * This method is the ready operational substate link down handler for the - * struct scic_sds_port object. This function notifies the SCI User that the phy has - * gone link down and if this is the last phy in the port the port will change - * state to the ready waiting substate. none - */ -static void scic_sds_port_ready_operational_substate_link_down_handler( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - scic_sds_port_deactivate_phy(sci_port, sci_phy, true); - - /* - * If there are no active phys left in the port, then transition - * the port to the WAITING state until such time as a phy goes - * link up. */ - if (sci_port->active_phy_mask == 0) - port_state_machine_change(sci_port, - SCIC_SDS_PORT_READY_SUBSTATE_WAITING); -} - /* * This method is the ready operational substate start io handler for the * struct scic_sds_port object. This function incremetns the outstanding request @@ -1262,18 +1166,6 @@ static enum sci_status default_port_handler(struct scic_sds_port *sci_port, return SCI_FAILURE_INVALID_STATE; } -static void scic_sds_port_default_link_up_handler(struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - default_port_handler(sci_port, __func__); -} - -static void scic_sds_port_default_link_down_handler(struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - default_port_handler(sci_port, __func__); -} - static enum sci_status scic_sds_port_default_start_io_handler(struct scic_sds_port *sci_port, struct scic_sds_remote_device *sci_dev, struct scic_sds_request *sci_req) @@ -1592,51 +1484,6 @@ static enum sci_status scic_sds_port_stopping_state_complete_io_handler( return SCI_SUCCESS; } -/* - * **************************************************************************** - * * RESETTING STATE HANDLERS - * **************************************************************************** */ - -/* - * This method will transition a failed port to its ready state. The port - * failed because a hard reset request timed out but at some time later one or - * more phys in the port became ready. enum sci_status SCI_SUCCESS - */ -static void scic_sds_port_reset_state_link_up_handler( - struct scic_sds_port *port, - struct scic_sds_phy *phy) -{ - /* - * / @todo We should make sure that the phy that has gone link up is the same - * / one on which we sent the reset. It is possible that the phy on - * / which we sent the reset is not the one that has gone link up and we - * / want to make sure that phy being reset comes back. Consider the - * / case where a reset is sent but before the hardware processes the - * / reset it get a link up on the port because of a hot plug event. - * / because of the reset request this phy will go link down almost - * / immediately. */ - - /* - * In the resetting state we don't notify the user regarding - * link up and link down notifications. */ - scic_sds_port_general_link_up_handler(port, phy, false); -} - -/* - * This method process link down notifications that occur during a port reset - * operation. Link downs can occur during the reset operation. enum sci_status - * SCI_SUCCESS - */ -static void scic_sds_port_reset_state_link_down_handler( - struct scic_sds_port *port, - struct scic_sds_phy *phy) -{ - /* - * In the resetting state we don't notify the user regarding - * link up and link down notifications. */ - scic_sds_port_deactivate_phy(port, phy, false); -} - enum sci_status scic_sds_port_start(struct scic_sds_port *sci_port) { struct scic_sds_controller *scic = sci_port->owning_controller; @@ -1890,7 +1737,79 @@ enum sci_status scic_sds_port_remove_phy(struct scic_sds_port *sci_port, */ port_state_machine_change(sci_port, SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING); + return SCI_SUCCESS; + default: + dev_warn(sciport_to_dev(sci_port), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } +} +enum sci_status scic_sds_port_link_up(struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + enum scic_sds_port_states state; + + state = sci_port->state_machine.current_state_id; + switch (state) { + case SCIC_SDS_PORT_READY_SUBSTATE_WAITING: + /* Since this is the first phy going link up for the port we + * can just enable it and continue + */ + scic_sds_port_activate_phy(sci_port, sci_phy, true); + + port_state_machine_change(sci_port, + SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); + return SCI_SUCCESS; + case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL: + scic_sds_port_general_link_up_handler(sci_port, sci_phy, true); + return SCI_SUCCESS; + case SCI_BASE_PORT_STATE_RESETTING: + /* TODO We should make sure that the phy that has gone + * link up is the same one on which we sent the reset. It is + * possible that the phy on which we sent the reset is not the + * one that has gone link up and we want to make sure that + * phy being reset comes back. Consider the case where a + * reset is sent but before the hardware processes the reset it + * get a link up on the port because of a hot plug event. + * because of the reset request this phy will go link down + * almost immediately. + */ + + /* In the resetting state we don't notify the user regarding + * link up and link down notifications. + */ + scic_sds_port_general_link_up_handler(sci_port, sci_phy, false); + return SCI_SUCCESS; + default: + dev_warn(sciport_to_dev(sci_port), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } +} + +enum sci_status scic_sds_port_link_down(struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + enum scic_sds_port_states state; + + state = sci_port->state_machine.current_state_id; + switch (state) { + case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL: + scic_sds_port_deactivate_phy(sci_port, sci_phy, true); + + /* If there are no active phys left in the port, then + * transition the port to the WAITING state until such time + * as a phy goes link up + */ + if (sci_port->active_phy_mask == 0) + port_state_machine_change(sci_port, + SCIC_SDS_PORT_READY_SUBSTATE_WAITING); + return SCI_SUCCESS; + case SCI_BASE_PORT_STATE_RESETTING: + /* In the resetting state we don't notify the user regarding + * link up and link down notifications. */ + scic_sds_port_deactivate_phy(sci_port, sci_phy, false); return SCI_SUCCESS; default: dev_warn(sciport_to_dev(sci_port), @@ -1901,50 +1820,34 @@ enum sci_status scic_sds_port_remove_phy(struct scic_sds_port *sci_port, static struct scic_sds_port_state_handler scic_sds_port_state_handler_table[] = { [SCI_BASE_PORT_STATE_STOPPED] = { - .link_up_handler = scic_sds_port_default_link_up_handler, - .link_down_handler = scic_sds_port_default_link_down_handler, .start_io_handler = scic_sds_port_default_start_io_handler, .complete_io_handler = scic_sds_port_default_complete_io_handler }, [SCI_BASE_PORT_STATE_STOPPING] = { - .link_up_handler = scic_sds_port_default_link_up_handler, - .link_down_handler = scic_sds_port_default_link_down_handler, .start_io_handler = scic_sds_port_default_start_io_handler, .complete_io_handler = scic_sds_port_stopping_state_complete_io_handler }, [SCI_BASE_PORT_STATE_READY] = { - .link_up_handler = scic_sds_port_default_link_up_handler, - .link_down_handler = scic_sds_port_default_link_down_handler, .start_io_handler = scic_sds_port_default_start_io_handler, .complete_io_handler = scic_sds_port_general_complete_io_handler }, [SCIC_SDS_PORT_READY_SUBSTATE_WAITING] = { - .link_up_handler = scic_sds_port_ready_waiting_substate_link_up_handler, - .link_down_handler = scic_sds_port_default_link_down_handler, .start_io_handler = scic_sds_port_ready_waiting_substate_start_io_handler, .complete_io_handler = scic_sds_port_ready_substate_complete_io_handler, }, [SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL] = { - .link_up_handler = scic_sds_port_ready_operational_substate_link_up_handler, - .link_down_handler = scic_sds_port_ready_operational_substate_link_down_handler, .start_io_handler = scic_sds_port_ready_operational_substate_start_io_handler, .complete_io_handler = scic_sds_port_ready_substate_complete_io_handler, }, [SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING] = { - .link_up_handler = scic_sds_port_default_link_up_handler, - .link_down_handler = scic_sds_port_default_link_down_handler, .start_io_handler = scic_sds_port_default_start_io_handler, .complete_io_handler = scic_sds_port_ready_configuring_substate_complete_io_handler }, [SCI_BASE_PORT_STATE_RESETTING] = { - .link_up_handler = scic_sds_port_reset_state_link_up_handler, - .link_down_handler = scic_sds_port_reset_state_link_down_handler, .start_io_handler = scic_sds_port_default_start_io_handler, .complete_io_handler = scic_sds_port_general_complete_io_handler }, [SCI_BASE_PORT_STATE_FAILED] = { - .link_up_handler = scic_sds_port_default_link_up_handler, - .link_down_handler = scic_sds_port_default_link_down_handler, .start_io_handler = scic_sds_port_default_start_io_handler, .complete_io_handler = scic_sds_port_general_complete_io_handler } diff --git a/drivers/scsi/isci/port.h b/drivers/scsi/isci/port.h index 20f99263fa0a..bbce0ec583a9 100644 --- a/drivers/scsi/isci/port.h +++ b/drivers/scsi/isci/port.h @@ -312,9 +312,6 @@ typedef enum sci_status (*scic_sds_port_io_request_handler_t)(struct scic_sds_po struct scic_sds_request *); struct scic_sds_port_state_handler { - scic_sds_port_link_handler_t link_up_handler; - scic_sds_port_link_handler_t link_down_handler; - scic_sds_port_io_request_handler_t start_io_handler; scic_sds_port_io_request_handler_t complete_io_handler; }; @@ -402,13 +399,10 @@ bool scic_sds_port_link_detected( struct scic_sds_port *sci_port, struct scic_sds_phy *sci_phy); -void scic_sds_port_link_up( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy); - -void scic_sds_port_link_down( - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy); +enum sci_status scic_sds_port_link_up(struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy); +enum sci_status scic_sds_port_link_down(struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy); enum sci_status scic_sds_port_start_io( struct scic_sds_port *sci_port, |