From e622571f0f05986b23eba566b73b3abeb5d847d3 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Sun, 1 May 2011 16:26:09 -0700 Subject: [PATCH] isci: unify remote_device event_handlers Implement all states in scic_sds_remote_device_event() and delete the state handler. Reported-by: Christoph Hellwig Signed-off-by: Dan Williams --- drivers/scsi/isci/remote_device.c | 241 ++++++++++-------------------- drivers/scsi/isci/remote_device.h | 1 - 2 files changed, 82 insertions(+), 160 deletions(-) diff --git a/drivers/scsi/isci/remote_device.c b/drivers/scsi/isci/remote_device.c index 26c5253530ea..53f4ecfddce4 100644 --- a/drivers/scsi/isci/remote_device.c +++ b/drivers/scsi/isci/remote_device.c @@ -293,19 +293,84 @@ enum sci_status scic_sds_remote_device_frame_handler( return sci_dev->state_handlers->frame_handler(sci_dev, frame_index); } -/** - * - * @sci_dev: The remote device for which the event handling is being - * requested. - * @event_code: This is the event code that is to be processed. - * - * This method invokes the remote device event handler. enum sci_status - */ -enum sci_status scic_sds_remote_device_event_handler( - struct scic_sds_remote_device *sci_dev, - u32 event_code) +static bool is_remote_device_ready(struct scic_sds_remote_device *sci_dev) { - return sci_dev->state_handlers->event_handler(sci_dev, event_code); + + struct sci_base_state_machine *sm = &sci_dev->state_machine; + enum scic_sds_remote_device_states state = sm->current_state_id; + + switch (state) { + case SCI_BASE_REMOTE_DEVICE_STATE_READY: + case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_IDLE: + case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_CMD: + case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ: + case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ_ERROR: + case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_AWAIT_RESET: + case SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE: + case SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_CMD: + return true; + default: + return false; + } +} + +enum sci_status scic_sds_remote_device_event_handler(struct scic_sds_remote_device *sci_dev, + u32 event_code) +{ + struct sci_base_state_machine *sm = &sci_dev->state_machine; + enum scic_sds_remote_device_states state = sm->current_state_id; + enum sci_status status; + + switch (scu_get_event_type(event_code)) { + case SCU_EVENT_TYPE_RNC_OPS_MISC: + case SCU_EVENT_TYPE_RNC_SUSPEND_TX: + case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX: + status = scic_sds_remote_node_context_event_handler(&sci_dev->rnc, event_code); + break; + case SCU_EVENT_TYPE_PTX_SCHEDULE_EVENT: + if (scu_get_event_code(event_code) == SCU_EVENT_IT_NEXUS_TIMEOUT) { + status = SCI_SUCCESS; + + /* Suspend the associated RNC */ + scic_sds_remote_node_context_suspend(&sci_dev->rnc, + SCI_SOFTWARE_SUSPENSION, + NULL, NULL); + + dev_dbg(scirdev_to_dev(sci_dev), + "%s: device: %p event code: %x: %s\n", + __func__, sci_dev, event_code, + is_remote_device_ready(sci_dev) + ? "I_T_Nexus_Timeout event" + : "I_T_Nexus_Timeout event in wrong state"); + + break; + } + /* Else, fall through and treat as unhandled... */ + default: + dev_dbg(scirdev_to_dev(sci_dev), + "%s: device: %p event code: %x: %s\n", + __func__, sci_dev, event_code, + is_remote_device_ready(sci_dev) + ? "unexpected event" + : "unexpected event in wrong state"); + status = SCI_FAILURE_INVALID_STATE; + break; + } + + if (status != SCI_SUCCESS) + return status; + + if (state == SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_IDLE) { + + /* We pick up suspension events to handle specifically to this + * state. We resume the RNC right away. + */ + if (scu_get_event_type(event_code) == SCU_EVENT_TYPE_RNC_SUSPEND_TX || + scu_get_event_type(event_code) == SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX) + status = scic_sds_remote_node_context_resume(&sci_dev->rnc, NULL, NULL); + } + + return status; } static void scic_sds_remote_device_start_request(struct scic_sds_remote_device *sci_dev, @@ -646,103 +711,13 @@ void scic_sds_remote_device_post_request( static void remote_device_resume_done(void *_dev) { struct scic_sds_remote_device *sci_dev = _dev; - enum scic_sds_remote_device_states state; - state = sci_dev->state_machine.current_state_id; - switch (state) { - case SCI_BASE_REMOTE_DEVICE_STATE_READY: - case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_IDLE: - case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_CMD: - case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ: - case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ_ERROR: - case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_AWAIT_RESET: - case SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE: - case SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_CMD: - break; - default: - /* go 'ready' if we are not already in a ready state */ - sci_base_state_machine_change_state(&sci_dev->state_machine, - SCI_BASE_REMOTE_DEVICE_STATE_READY); - break; - } -} + if (is_remote_device_ready(sci_dev)) + return; -/** - * - * @device: The struct scic_sds_remote_device which is then cast into a - * struct scic_sds_remote_device. - * @event_code: The event code that the struct scic_sds_controller wants the device - * object to process. - * - * This method is the default event handler. It will call the RNC state - * machine handler for any RNC events otherwise it will log a warning and - * returns a failure. enum sci_status SCI_FAILURE_INVALID_STATE - */ -static enum sci_status scic_sds_remote_device_core_event_handler( - struct scic_sds_remote_device *sci_dev, - u32 event_code, - bool is_ready_state) -{ - enum sci_status status; - - switch (scu_get_event_type(event_code)) { - case SCU_EVENT_TYPE_RNC_OPS_MISC: - case SCU_EVENT_TYPE_RNC_SUSPEND_TX: - case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX: - status = scic_sds_remote_node_context_event_handler(&sci_dev->rnc, event_code); - break; - case SCU_EVENT_TYPE_PTX_SCHEDULE_EVENT: - - if (scu_get_event_code(event_code) == SCU_EVENT_IT_NEXUS_TIMEOUT) { - status = SCI_SUCCESS; - - /* Suspend the associated RNC */ - scic_sds_remote_node_context_suspend(&sci_dev->rnc, - SCI_SOFTWARE_SUSPENSION, - NULL, NULL); - - dev_dbg(scirdev_to_dev(sci_dev), - "%s: device: %p event code: %x: %s\n", - __func__, sci_dev, event_code, - (is_ready_state) - ? "I_T_Nexus_Timeout event" - : "I_T_Nexus_Timeout event in wrong state"); - - break; - } - /* Else, fall through and treat as unhandled... */ - - default: - dev_dbg(scirdev_to_dev(sci_dev), - "%s: device: %p event code: %x: %s\n", - __func__, sci_dev, event_code, - (is_ready_state) - ? "unexpected event" - : "unexpected event in wrong state"); - status = SCI_FAILURE_INVALID_STATE; - break; - } - - return status; -} -/** - * - * @device: The struct scic_sds_remote_device which is then cast into a - * struct scic_sds_remote_device. - * @event_code: The event code that the struct scic_sds_controller wants the device - * object to process. - * - * This method is the default event handler. It will call the RNC state - * machine handler for any RNC events otherwise it will log a warning and - * returns a failure. enum sci_status SCI_FAILURE_INVALID_STATE - */ -static enum sci_status scic_sds_remote_device_default_event_handler( - struct scic_sds_remote_device *sci_dev, - u32 event_code) -{ - return scic_sds_remote_device_core_event_handler(sci_dev, - event_code, - false); + /* go 'ready' if we are not already in a ready state */ + sci_base_state_machine_change_state(&sci_dev->state_machine, + SCI_BASE_REMOTE_DEVICE_STATE_READY); } /** @@ -824,43 +799,6 @@ static enum sci_status scic_sds_remote_device_general_frame_handler( return result; } -/** - * - * @[in]: sci_dev This is the device object that is receiving the event. - * @[in]: event_code The event code to process. - * - * This is a common method for handling events reported to the remote device - * from the controller object. enum sci_status - */ -static enum sci_status scic_sds_remote_device_general_event_handler( - struct scic_sds_remote_device *sci_dev, - u32 event_code) -{ - return scic_sds_remote_device_core_event_handler(sci_dev, - event_code, - true); -} - -static enum sci_status scic_sds_stp_remote_device_ready_idle_substate_event_handler( - struct scic_sds_remote_device *sci_dev, - u32 event_code) -{ - enum sci_status status; - - status = scic_sds_remote_device_general_event_handler(sci_dev, event_code); - if (status != SCI_SUCCESS) - return status; - - /* We pick up suspension events to handle specifically to this state. We - * resume the RNC right away. enum sci_status - */ - if (scu_get_event_type(event_code) == SCU_EVENT_TYPE_RNC_SUSPEND_TX || - scu_get_event_type(event_code) == SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX) - status = scic_sds_remote_node_context_resume(&sci_dev->rnc, NULL, NULL); - - return status; -} - static enum sci_status scic_sds_stp_remote_device_ready_ncq_substate_frame_handler(struct scic_sds_remote_device *sci_dev, u32 frame_index) { @@ -945,63 +883,48 @@ static enum sci_status scic_sds_smp_remote_device_ready_cmd_substate_frame_handl static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_state_handler_table[] = { [SCI_BASE_REMOTE_DEVICE_STATE_INITIAL] = { - .event_handler = scic_sds_remote_device_default_event_handler, .frame_handler = scic_sds_remote_device_default_frame_handler }, [SCI_BASE_REMOTE_DEVICE_STATE_STOPPED] = { - .event_handler = scic_sds_remote_device_default_event_handler, .frame_handler = scic_sds_remote_device_default_frame_handler }, [SCI_BASE_REMOTE_DEVICE_STATE_STARTING] = { - .event_handler = scic_sds_remote_device_general_event_handler, .frame_handler = scic_sds_remote_device_default_frame_handler }, [SCI_BASE_REMOTE_DEVICE_STATE_READY] = { - .event_handler = scic_sds_remote_device_general_event_handler, .frame_handler = scic_sds_remote_device_general_frame_handler, }, [SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_IDLE] = { - .event_handler = scic_sds_stp_remote_device_ready_idle_substate_event_handler, .frame_handler = scic_sds_remote_device_default_frame_handler }, [SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_CMD] = { - .event_handler = scic_sds_remote_device_general_event_handler, .frame_handler = scic_sds_stp_remote_device_ready_cmd_substate_frame_handler }, [SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ] = { - .event_handler = scic_sds_remote_device_general_event_handler, .frame_handler = scic_sds_stp_remote_device_ready_ncq_substate_frame_handler }, [SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ_ERROR] = { - .event_handler = scic_sds_remote_device_general_event_handler, .frame_handler = scic_sds_remote_device_general_frame_handler }, [SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_AWAIT_RESET] = { - .event_handler = scic_sds_remote_device_general_event_handler, .frame_handler = scic_sds_remote_device_general_frame_handler }, [SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE] = { - .event_handler = scic_sds_remote_device_general_event_handler, .frame_handler = scic_sds_remote_device_default_frame_handler }, [SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_CMD] = { - .event_handler = scic_sds_remote_device_general_event_handler, .frame_handler = scic_sds_smp_remote_device_ready_cmd_substate_frame_handler }, [SCI_BASE_REMOTE_DEVICE_STATE_STOPPING] = { - .event_handler = scic_sds_remote_device_general_event_handler, .frame_handler = scic_sds_remote_device_general_frame_handler }, [SCI_BASE_REMOTE_DEVICE_STATE_FAILED] = { - .event_handler = scic_sds_remote_device_default_event_handler, .frame_handler = scic_sds_remote_device_general_frame_handler }, [SCI_BASE_REMOTE_DEVICE_STATE_RESETTING] = { - .event_handler = scic_sds_remote_device_default_event_handler, .frame_handler = scic_sds_remote_device_general_frame_handler }, [SCI_BASE_REMOTE_DEVICE_STATE_FINAL] = { - .event_handler = scic_sds_remote_device_default_event_handler, .frame_handler = scic_sds_remote_device_default_frame_handler } }; diff --git a/drivers/scsi/isci/remote_device.h b/drivers/scsi/isci/remote_device.h index bb8d17391c95..e376ec2ff369 100644 --- a/drivers/scsi/isci/remote_device.h +++ b/drivers/scsi/isci/remote_device.h @@ -386,7 +386,6 @@ typedef void (*scic_sds_remote_device_ready_not_ready_handler_t)( * */ struct scic_sds_remote_device_state_handler { - scic_sds_remote_device_event_handler_t event_handler; scic_sds_remote_device_frame_handler_t frame_handler; }; -- GitLab