diff options
Diffstat (limited to 'drivers/scsi/isci')
| -rw-r--r-- | drivers/scsi/isci/remote_node_context.c | 306 | ||||
| -rw-r--r-- | drivers/scsi/isci/remote_node_context.h | 32 |
2 files changed, 104 insertions, 234 deletions
diff --git a/drivers/scsi/isci/remote_node_context.c b/drivers/scsi/isci/remote_node_context.c index 769a3fc6ec4b..095d61288c3b 100644 --- a/drivers/scsi/isci/remote_node_context.c +++ b/drivers/scsi/isci/remote_node_context.c @@ -195,60 +195,6 @@ static void scic_sds_remote_node_context_setup_to_destory( sci_rnc->user_cookie = callback_parameter; } -/** - * - * @sci_rnc: - * @callback: - * - * This method will continue to resume a remote node context. This is used in - * the states where a resume is requested while a resume is in progress. - */ -static enum sci_status scic_sds_remote_node_context_continue_to_resume_handler( - struct scic_sds_remote_node_context *sci_rnc, - scics_sds_remote_node_context_callback callback, - void *callback_parameter) -{ - if (sci_rnc->destination_state == SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY) { - sci_rnc->user_callback = callback; - sci_rnc->user_cookie = callback_parameter; - - return SCI_SUCCESS; - } - - return SCI_FAILURE_INVALID_STATE; -} - -static enum sci_status scic_sds_remote_node_context_default_suspend_handler( - struct scic_sds_remote_node_context *sci_rnc, - u32 suspend_type, - scics_sds_remote_node_context_callback callback, - void *callback_parameter) -{ - dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), - "%s: SCIC Remote Node Context 0x%p requested to suspend " - "while in wrong state %d\n", - __func__, - sci_rnc, - sci_base_state_machine_get_state(&sci_rnc->state_machine)); - - return SCI_FAILURE_INVALID_STATE; -} - -static enum sci_status scic_sds_remote_node_context_default_resume_handler( - struct scic_sds_remote_node_context *sci_rnc, - scics_sds_remote_node_context_callback callback, - void *callback_parameter) -{ - dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), - "%s: SCIC Remote Node Context 0x%p requested to resume " - "while in wrong state %d\n", - __func__, - sci_rnc, - sci_base_state_machine_get_state(&sci_rnc->state_machine)); - - return SCI_FAILURE_INVALID_STATE; -} - static enum sci_status scic_sds_remote_node_context_default_start_io_handler( struct scic_sds_remote_node_context *sci_rnc, struct scic_sds_request *sci_req) @@ -295,61 +241,6 @@ static enum sci_status scic_sds_remote_node_context_success_start_task_handler( return SCI_SUCCESS; } -static enum sci_status scic_sds_remote_node_context_initial_state_resume_handler( - struct scic_sds_remote_node_context *sci_rnc, - scics_sds_remote_node_context_callback callback, - void *callback_parameter) -{ - if (sci_rnc->remote_node_index != SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX) { - scic_sds_remote_node_context_setup_to_resume( - sci_rnc, callback, callback_parameter - ); - - scic_sds_remote_node_context_construct_buffer(sci_rnc); - - sci_base_state_machine_change_state( - &sci_rnc->state_machine, - SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE - ); - - return SCI_SUCCESS; - } - - return SCI_FAILURE_INVALID_STATE; -} - -/** - * - * @sci_rnc: The remote node context object being suspended. - * @callback: The callback when the suspension is complete. - * @callback_parameter: The parameter that is to be passed into the callback. - * - * This method will handle the suspend requests from the ready state. - * SCI_SUCCESS - */ -static enum sci_status scic_sds_remote_node_context_ready_state_suspend_handler( - struct scic_sds_remote_node_context *sci_rnc, - u32 suspend_type, - scics_sds_remote_node_context_callback callback, - void *callback_parameter) -{ - sci_rnc->user_callback = callback; - sci_rnc->user_cookie = callback_parameter; - sci_rnc->suspension_code = suspend_type; - - if (suspend_type == SCI_SOFTWARE_SUSPENSION) { - scic_sds_remote_device_post_request(rnc_to_dev(sci_rnc), - SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX); - } - - sci_base_state_machine_change_state( - &sci_rnc->state_machine, - SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE - ); - - return SCI_SUCCESS; -} - /** * * @sci_rnc: The rnc for which the io request is targeted. @@ -366,39 +257,6 @@ static enum sci_status scic_sds_remote_node_context_ready_state_start_io_handler return SCI_SUCCESS; } -static enum sci_status scic_sds_remote_node_context_tx_suspended_state_resume_handler( - struct scic_sds_remote_node_context *sci_rnc, - scics_sds_remote_node_context_callback callback, - void *callback_parameter) -{ - struct scic_sds_remote_device *sci_dev = rnc_to_dev(sci_rnc); - struct domain_device *dev = sci_dev_to_domain(sci_dev); - enum sci_status status = SCI_SUCCESS; - - scic_sds_remote_node_context_setup_to_resume(sci_rnc, callback, - callback_parameter); - - /* TODO: consider adding a resume action of NONE, INVALIDATE, WRITE_TLCR */ - if (dev->dev_type == SAS_END_DEV || dev_is_expander(dev)) - sci_base_state_machine_change_state(&sci_rnc->state_machine, - SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE); - else if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) { - if (sci_dev->is_direct_attached) { - /* @todo Fix this since I am being silly in writing to the STPTLDARNI register. */ - sci_base_state_machine_change_state( - &sci_rnc->state_machine, - SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE); - } else { - sci_base_state_machine_change_state( - &sci_rnc->state_machine, - SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE); - } - } else - status = SCI_FAILURE; - - return status; -} - /** * * @sci_rnc: The remote node context which is to receive the task request. @@ -419,44 +277,6 @@ static enum sci_status scic_sds_remote_node_context_suspended_start_task_handler return SCI_SUCCESS; } -/* --------------------------------------------------------------------------- */ - -static enum sci_status scic_sds_remote_node_context_tx_rx_suspended_state_resume_handler( - struct scic_sds_remote_node_context *sci_rnc, - scics_sds_remote_node_context_callback callback, - void *callback_parameter) -{ - scic_sds_remote_node_context_setup_to_resume( - sci_rnc, callback, callback_parameter - ); - - sci_base_state_machine_change_state( - &sci_rnc->state_machine, - SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE - ); - - return SCI_FAILURE_INVALID_STATE; -} - -/* --------------------------------------------------------------------------- */ - -/** - * - * - * - */ -static enum sci_status scic_sds_remote_node_context_await_suspension_state_resume_handler( - struct scic_sds_remote_node_context *sci_rnc, - scics_sds_remote_node_context_callback callback, - void *callback_parameter) -{ - scic_sds_remote_node_context_setup_to_resume( - sci_rnc, callback, callback_parameter - ); - - return SCI_SUCCESS; -} - /** * * @sci_rnc: The remote node context which is to receive the task request. @@ -477,50 +297,34 @@ static enum sci_status scic_sds_remote_node_context_await_suspension_state_start static struct scic_sds_remote_node_context_handlers scic_sds_remote_node_context_state_handler_table[] = { [SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE] = { - .suspend_handler = scic_sds_remote_node_context_default_suspend_handler, - .resume_handler = scic_sds_remote_node_context_initial_state_resume_handler, .start_io_handler = scic_sds_remote_node_context_default_start_io_handler, .start_task_handler = scic_sds_remote_node_context_default_start_task_handler, }, [SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE] = { - .suspend_handler = scic_sds_remote_node_context_default_suspend_handler, - .resume_handler = scic_sds_remote_node_context_continue_to_resume_handler, .start_io_handler = scic_sds_remote_node_context_default_start_io_handler, .start_task_handler = scic_sds_remote_node_context_default_start_task_handler, }, [SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE] = { - .suspend_handler = scic_sds_remote_node_context_default_suspend_handler, - .resume_handler = scic_sds_remote_node_context_continue_to_resume_handler, .start_io_handler = scic_sds_remote_node_context_default_start_io_handler, .start_task_handler = scic_sds_remote_node_context_default_start_task_handler, }, [SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE] = { - .suspend_handler = scic_sds_remote_node_context_default_suspend_handler, - .resume_handler = scic_sds_remote_node_context_continue_to_resume_handler, .start_io_handler = scic_sds_remote_node_context_default_start_io_handler, .start_task_handler = scic_sds_remote_node_context_success_start_task_handler, }, [SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE] = { - .suspend_handler = scic_sds_remote_node_context_ready_state_suspend_handler, - .resume_handler = scic_sds_remote_node_context_default_resume_handler, .start_io_handler = scic_sds_remote_node_context_ready_state_start_io_handler, .start_task_handler = scic_sds_remote_node_context_success_start_task_handler, }, [SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE] = { - .suspend_handler = scic_sds_remote_node_context_default_suspend_handler, - .resume_handler = scic_sds_remote_node_context_tx_suspended_state_resume_handler, .start_io_handler = scic_sds_remote_node_context_default_start_io_handler, .start_task_handler = scic_sds_remote_node_context_suspended_start_task_handler, }, [SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE] = { - .suspend_handler = scic_sds_remote_node_context_default_suspend_handler, - .resume_handler = scic_sds_remote_node_context_tx_rx_suspended_state_resume_handler, .start_io_handler = scic_sds_remote_node_context_default_start_io_handler, .start_task_handler = scic_sds_remote_node_context_suspended_start_task_handler, }, [SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE] = { - .suspend_handler = scic_sds_remote_node_context_default_suspend_handler, - .resume_handler = scic_sds_remote_node_context_await_suspension_state_resume_handler, .start_io_handler = scic_sds_remote_node_context_default_start_io_handler, .start_task_handler = scic_sds_remote_node_context_await_suspension_state_start_task_handler, } @@ -548,21 +352,11 @@ static void scic_sds_remote_node_context_notify_user( } } -/** - * - * - * This method will continue the remote node context state machine by - * requesting to resume the remote node context state machine from its current - * state. - */ -static void scic_sds_remote_node_context_continue_state_transitions( - struct scic_sds_remote_node_context *rnc) +static void scic_sds_remote_node_context_continue_state_transitions(struct scic_sds_remote_node_context *rnc) { - if (rnc->destination_state == SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY) { - rnc->state_handlers->resume_handler( - rnc, rnc->user_callback, rnc->user_cookie - ); - } + if (rnc->destination_state == SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY) + scic_sds_remote_node_context_resume(rnc, rnc->user_callback, + rnc->user_cookie); } /** @@ -989,3 +783,95 @@ enum sci_status scic_sds_remote_node_context_destruct(struct scic_sds_remote_nod return SCI_FAILURE_INVALID_STATE; } } + +enum sci_status scic_sds_remote_node_context_suspend(struct scic_sds_remote_node_context *sci_rnc, + u32 suspend_type, + scics_sds_remote_node_context_callback cb_fn, + void *cb_p) +{ + enum scis_sds_remote_node_context_states state; + + state = sci_rnc->state_machine.current_state_id; + if (state != SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE) { + dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), + "%s: invalid state %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } + + sci_rnc->user_callback = cb_fn; + sci_rnc->user_cookie = cb_p; + sci_rnc->suspension_code = suspend_type; + + if (suspend_type == SCI_SOFTWARE_SUSPENSION) { + scic_sds_remote_device_post_request(rnc_to_dev(sci_rnc), + SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX); + } + + sci_base_state_machine_change_state(&sci_rnc->state_machine, + SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE); + return SCI_SUCCESS; +} + +enum sci_status scic_sds_remote_node_context_resume(struct scic_sds_remote_node_context *sci_rnc, + scics_sds_remote_node_context_callback cb_fn, + void *cb_p) +{ + enum scis_sds_remote_node_context_states state; + + state = sci_rnc->state_machine.current_state_id; + switch (state) { + case SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE: + if (sci_rnc->remote_node_index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX) + return SCI_FAILURE_INVALID_STATE; + + scic_sds_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p); + scic_sds_remote_node_context_construct_buffer(sci_rnc); + sci_base_state_machine_change_state(&sci_rnc->state_machine, + SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE); + return SCI_SUCCESS; + case SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE: + case SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE: + case SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE: + if (sci_rnc->destination_state != SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY) + return SCI_FAILURE_INVALID_STATE; + + sci_rnc->user_callback = cb_fn; + sci_rnc->user_cookie = cb_p; + return SCI_SUCCESS; + case SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE: { + struct scic_sds_remote_device *sci_dev = rnc_to_dev(sci_rnc); + struct domain_device *dev = sci_dev_to_domain(sci_dev); + + scic_sds_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p); + + /* TODO: consider adding a resume action of NONE, INVALIDATE, WRITE_TLCR */ + if (dev->dev_type == SAS_END_DEV || dev_is_expander(dev)) + sci_base_state_machine_change_state(&sci_rnc->state_machine, + SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE); + else if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) { + if (sci_dev->is_direct_attached) { + /* @todo Fix this since I am being silly in writing to the STPTLDARNI register. */ + sci_base_state_machine_change_state(&sci_rnc->state_machine, + SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE); + } else { + sci_base_state_machine_change_state(&sci_rnc->state_machine, + SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE); + } + } else + return SCI_FAILURE; + return SCI_SUCCESS; + } + case SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE: + scic_sds_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p); + sci_base_state_machine_change_state(&sci_rnc->state_machine, + SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE); + return SCI_FAILURE_INVALID_STATE; + case SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE: + scic_sds_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p); + return SCI_SUCCESS; + default: + dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), + "%s: invalid state %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } +} diff --git a/drivers/scsi/isci/remote_node_context.h b/drivers/scsi/isci/remote_node_context.h index 1cd323438292..68983748eba9 100644 --- a/drivers/scsi/isci/remote_node_context.h +++ b/drivers/scsi/isci/remote_node_context.h @@ -90,13 +90,6 @@ typedef enum sci_status (*scic_sds_remote_node_context_operation)( void *callback_parameter ); -typedef enum sci_status (*scic_sds_remote_node_context_suspend_operation)( - struct scic_sds_remote_node_context *sci_rnc, - u32 suspension_type, - scics_sds_remote_node_context_callback callback, - void *callback_parameter - ); - typedef enum sci_status (*scic_sds_remote_node_context_io_request)( struct scic_sds_remote_node_context *sci_rnc, struct scic_sds_request *sci_req @@ -104,19 +97,6 @@ typedef enum sci_status (*scic_sds_remote_node_context_io_request)( struct scic_sds_remote_node_context_handlers { /** - * This handler is invoked when there is a request to suspend the RNC. The - * callback is invoked after the hardware notification that the remote node is - * suspended. - */ - scic_sds_remote_node_context_suspend_operation suspend_handler; - - /** - * This handler is invoked when there is a request to resume the RNC. The - * callback is invoked when after the RNC has reached the ready state. - */ - scic_sds_remote_node_context_operation resume_handler; - - /** * This handler is invoked when there is a request to start an io request * operation. */ @@ -260,11 +240,15 @@ enum sci_status scic_sds_remote_node_context_event_handler(struct scic_sds_remot enum sci_status scic_sds_remote_node_context_destruct(struct scic_sds_remote_node_context *sci_rnc, scics_sds_remote_node_context_callback callback, void *callback_parameter); -#define scic_sds_remote_node_context_resume(rnc, callback, parameter) \ - ((rnc)->state_handlers->resume_handler(rnc, callback, parameter)) -#define scic_sds_remote_node_context_suspend(rnc, suspend_type, callback, parameter) \ - ((rnc)->state_handlers->suspend_handler(rnc, suspend_type, callback, parameter)) +enum sci_status scic_sds_remote_node_context_suspend(struct scic_sds_remote_node_context *sci_rnc, + u32 suspend_type, + scics_sds_remote_node_context_callback cb_fn, + void *cb_p); + +enum sci_status scic_sds_remote_node_context_resume(struct scic_sds_remote_node_context *sci_rnc, + scics_sds_remote_node_context_callback cb_fn, + void *cb_p); #define scic_sds_remote_node_context_start_io(rnc, request) \ ((rnc)->state_handlers->start_io_handler(rnc, request)) |
