diff options
Diffstat (limited to 'drivers/scsi/isci/remote_node_context.c')
| -rw-r--r-- | drivers/scsi/isci/remote_node_context.c | 306 |
1 files changed, 43 insertions, 263 deletions
diff --git a/drivers/scsi/isci/remote_node_context.c b/drivers/scsi/isci/remote_node_context.c index 095d61288c3..82507bd228d 100644 --- a/drivers/scsi/isci/remote_node_context.c +++ b/drivers/scsi/isci/remote_node_context.c @@ -176,15 +176,6 @@ static void scic_sds_remote_node_context_setup_to_resume( } } -/** - * - * @sci_rnc: - * @callback: - * @callback_parameter: - * - * This method will setup the remote node context object so it will transistion - * to its final state. none - */ static void scic_sds_remote_node_context_setup_to_destory( struct scic_sds_remote_node_context *sci_rnc, scics_sds_remote_node_context_callback callback, @@ -195,146 +186,6 @@ static void scic_sds_remote_node_context_setup_to_destory( sci_rnc->user_cookie = callback_parameter; } -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) -{ - dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), - "%s: SCIC Remote Node Context 0x%p requested to start io " - "0x%p while in wrong state %d\n", - __func__, - sci_rnc, - sci_req, - sci_base_state_machine_get_state(&sci_rnc->state_machine)); - - return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED; -} - -static enum sci_status scic_sds_remote_node_context_default_start_task_handler( - struct scic_sds_remote_node_context *sci_rnc, - struct scic_sds_request *sci_req) -{ - dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), - "%s: SCIC Remote Node Context 0x%p requested to start " - "task 0x%p while in wrong state %d\n", - __func__, - sci_rnc, - sci_req, - sci_base_state_machine_get_state(&sci_rnc->state_machine)); - - return SCI_FAILURE; -} - -/** - * - * @sci_rnc: The rnc for which the task request is targeted. - * @sci_req: The request which is going to be started. - * - * This method determines if the task request can be started by the SCU - * hardware. When the RNC is in the ready state any task can be started. - * enum sci_status SCI_SUCCESS - */ -static enum sci_status scic_sds_remote_node_context_success_start_task_handler( - struct scic_sds_remote_node_context *sci_rnc, - struct scic_sds_request *sci_req) -{ - return SCI_SUCCESS; -} - -/** - * - * @sci_rnc: The rnc for which the io request is targeted. - * @sci_req: The request which is going to be started. - * - * This method determines if the io request can be started by the SCU hardware. - * When the RNC is in the ready state any io request can be started. enum sci_status - * SCI_SUCCESS - */ -static enum sci_status scic_sds_remote_node_context_ready_state_start_io_handler( - struct scic_sds_remote_node_context *sci_rnc, - struct scic_sds_request *sci_req) -{ - return SCI_SUCCESS; -} - -/** - * - * @sci_rnc: The remote node context which is to receive the task request. - * @sci_req: The task request to be transmitted to to the remote target - * device. - * - * This method will report a success or failure attempt to start a new task - * request to the hardware. Since all task requests are sent on the high - * priority queue they can be sent when the RCN is in a TX suspend state. - * enum sci_status SCI_SUCCESS - */ -static enum sci_status scic_sds_remote_node_context_suspended_start_task_handler( - struct scic_sds_remote_node_context *sci_rnc, - struct scic_sds_request *sci_req) -{ - scic_sds_remote_node_context_resume(sci_rnc, NULL, NULL); - - return SCI_SUCCESS; -} - -/** - * - * @sci_rnc: The remote node context which is to receive the task request. - * @sci_req: The task request to be transmitted to to the remote target - * device. - * - * This method will report a success or failure attempt to start a new task - * request to the hardware. Since all task requests are sent on the high - * priority queue they can be sent when the RCN is in a TX suspend state. - * enum sci_status SCI_SUCCESS - */ -static enum sci_status scic_sds_remote_node_context_await_suspension_state_start_task_handler( - struct scic_sds_remote_node_context *sci_rnc, - struct scic_sds_request *sci_req) -{ - return SCI_SUCCESS; -} - -static struct scic_sds_remote_node_context_handlers scic_sds_remote_node_context_state_handler_table[] = { - [SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE] = { - .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] = { - .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] = { - .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] = { - .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] = { - .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] = { - .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] = { - .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] = { - .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, - } -}; - -/* - * ***************************************************************************** - * * REMOTE NODE CONTEXT PRIVATE METHODS - * ***************************************************************************** */ - /** * * @@ -415,80 +266,34 @@ static void scic_sds_remote_node_context_invalidate_context_buffer( SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE); } -/* - * ***************************************************************************** - * * REMOTE NODE CONTEXT STATE ENTER AND EXIT METHODS - * ***************************************************************************** */ - -/** - * - * - * - */ static void scic_sds_remote_node_context_initial_state_enter(void *object) { struct scic_sds_remote_node_context *rnc = object; + struct sci_base_state_machine *sm = &rnc->state_machine; - SET_STATE_HANDLER( - rnc, - scic_sds_remote_node_context_state_handler_table, - SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE - ); - - /* - * Check to see if we have gotten back to the initial state because someone - * requested to destroy the remote node context object. */ - if ( - rnc->state_machine.previous_state_id - == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE - ) { + /* Check to see if we have gotten back to the initial state because + * someone requested to destroy the remote node context object. + */ + if (sm->previous_state_id == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE) { rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED; - scic_sds_remote_node_context_notify_user(rnc); } } -/** - * - * - * - */ static void scic_sds_remote_node_context_posting_state_enter(void *object) { struct scic_sds_remote_node_context *sci_rnc = object; - SET_STATE_HANDLER( - sci_rnc, - scic_sds_remote_node_context_state_handler_table, - SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE - ); - scic_sds_remote_node_context_validate_context_buffer(sci_rnc); } -/** - * - * - * - */ static void scic_sds_remote_node_context_invalidating_state_enter(void *object) { struct scic_sds_remote_node_context *rnc = object; - SET_STATE_HANDLER( - rnc, - scic_sds_remote_node_context_state_handler_table, - SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE - ); - scic_sds_remote_node_context_invalidate_context_buffer(rnc); } -/** - * - * - * - */ static void scic_sds_remote_node_context_resuming_state_enter(void *object) { struct scic_sds_remote_node_context *rnc = object; @@ -498,12 +303,6 @@ static void scic_sds_remote_node_context_resuming_state_enter(void *object) sci_dev = rnc_to_dev(rnc); dev = sci_dev_to_domain(sci_dev); - SET_STATE_HANDLER( - rnc, - scic_sds_remote_node_context_state_handler_table, - SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE - ); - /* * For direct attached SATA devices we need to clear the TLCR * NCQ to TCi tag mapping on the phy and in cases where we @@ -518,84 +317,31 @@ static void scic_sds_remote_node_context_resuming_state_enter(void *object) scic_sds_remote_device_post_request(sci_dev, SCU_CONTEXT_COMMAND_POST_RNC_RESUME); } -/** - * - * - * - */ static void scic_sds_remote_node_context_ready_state_enter(void *object) { struct scic_sds_remote_node_context *rnc = object; - SET_STATE_HANDLER( - rnc, - scic_sds_remote_node_context_state_handler_table, - SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE - ); - rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED; - if (rnc->user_callback != NULL) { + if (rnc->user_callback) scic_sds_remote_node_context_notify_user(rnc); - } } -/** - * - * - * - */ static void scic_sds_remote_node_context_tx_suspended_state_enter(void *object) { struct scic_sds_remote_node_context *rnc = object; - SET_STATE_HANDLER( - rnc, - scic_sds_remote_node_context_state_handler_table, - SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE - ); - scic_sds_remote_node_context_continue_state_transitions(rnc); } -/** - * - * - * - */ static void scic_sds_remote_node_context_tx_rx_suspended_state_enter( void *object) { struct scic_sds_remote_node_context *rnc = object; - SET_STATE_HANDLER( - rnc, - scic_sds_remote_node_context_state_handler_table, - SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE - ); - scic_sds_remote_node_context_continue_state_transitions(rnc); } -/** - * - * - * - */ -static void scic_sds_remote_node_context_await_suspension_state_enter( - void *object) -{ - struct scic_sds_remote_node_context *rnc = object; - - SET_STATE_HANDLER( - rnc, - scic_sds_remote_node_context_state_handler_table, - SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE - ); -} - -/* --------------------------------------------------------------------------- */ - static const struct sci_base_state scic_sds_remote_node_context_state_table[] = { [SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE] = { .enter_state = scic_sds_remote_node_context_initial_state_enter, @@ -618,9 +364,7 @@ static const struct sci_base_state scic_sds_remote_node_context_state_table[] = [SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE] = { .enter_state = scic_sds_remote_node_context_tx_rx_suspended_state_enter, }, - [SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE] = { - .enter_state = scic_sds_remote_node_context_await_suspension_state_enter, - }, + [SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE] = { }, }; void scic_sds_remote_node_context_construct(struct scic_sds_remote_node_context *rnc, @@ -875,3 +619,39 @@ enum sci_status scic_sds_remote_node_context_resume(struct scic_sds_remote_node_ return SCI_FAILURE_INVALID_STATE; } } + +enum sci_status scic_sds_remote_node_context_start_io(struct scic_sds_remote_node_context *sci_rnc, + struct scic_sds_request *sci_req) +{ + 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_REMOTE_DEVICE_RESET_REQUIRED; + } + return SCI_SUCCESS; +} + +enum sci_status scic_sds_remote_node_context_start_task(struct scic_sds_remote_node_context *sci_rnc, + struct scic_sds_request *sci_req) +{ + enum scis_sds_remote_node_context_states state; + + state = sci_rnc->state_machine.current_state_id; + switch (state) { + case SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE: + case SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE: + case SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE: + return SCI_SUCCESS; + case SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE: + case SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE: + scic_sds_remote_node_context_resume(sci_rnc, NULL, NULL); + 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; + } +} |