From c629582d0dea42d8b3617f8c46ea2770b95e23aa Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sat, 2 Apr 2011 08:15:20 -0400 Subject: [PATCH] isci: remove scic_controller state handlers Remove the state handler indirections for the scic_controller, and replace them with procedural calls that check for the correct state first. Signed-off-by: Christoph Hellwig Signed-off-by: Dan Williams --- drivers/scsi/isci/core/scic_controller.h | 5 - drivers/scsi/isci/core/scic_sds_controller.c | 847 ++++++------------------ drivers/scsi/isci/core/scic_sds_controller.h | 86 +-- drivers/scsi/isci/core/scic_sds_remote_device.c | 11 +- drivers/scsi/isci/core/scic_sds_stp_request.c | 18 +- drivers/scsi/isci/task.c | 2 +- 6 files changed, 193 insertions(+), 776 deletions(-) diff --git a/drivers/scsi/isci/core/scic_controller.h b/drivers/scsi/isci/core/scic_controller.h index 649b61a..23a2c78 100644 --- a/drivers/scsi/isci/core/scic_controller.h +++ b/drivers/scsi/isci/core/scic_controller.h @@ -110,11 +110,6 @@ enum sci_task_status scic_controller_start_task( struct scic_sds_request *task_request, u16 io_tag); -enum sci_status scic_controller_complete_task( - struct scic_sds_controller *controller, - struct scic_sds_remote_device *remote_device, - struct scic_sds_request *task_request); - enum sci_status scic_controller_terminate_request( struct scic_sds_controller *controller, struct scic_sds_remote_device *remote_device, diff --git a/drivers/scsi/isci/core/scic_sds_controller.c b/drivers/scsi/isci/core/scic_sds_controller.c index 4aae7b6..f16a23a 100644 --- a/drivers/scsi/isci/core/scic_sds_controller.c +++ b/drivers/scsi/isci/core/scic_sds_controller.c @@ -1453,46 +1453,45 @@ void scic_sds_controller_error_handler(struct scic_sds_controller *scic) -void scic_sds_controller_link_up( - struct scic_sds_controller *scic, - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) -{ - scic_sds_controller_phy_handler_t link_up; - u32 state; - - state = scic->state_machine.current_state_id; - link_up = scic_sds_controller_state_handler_table[state].link_up; - - if (link_up) - link_up(scic, sci_port, sci_phy); - else +void scic_sds_controller_link_up(struct scic_sds_controller *scic, + struct scic_sds_port *port, struct scic_sds_phy *phy) +{ + switch (scic->state_machine.current_state_id) { + case SCI_BASE_CONTROLLER_STATE_STARTING: + scic_sds_controller_phy_timer_stop(scic); + scic->port_agent.link_up_handler(scic, &scic->port_agent, + port, phy); + scic_sds_controller_start_next_phy(scic); + break; + case SCI_BASE_CONTROLLER_STATE_READY: + scic->port_agent.link_up_handler(scic, &scic->port_agent, + port, phy); + break; + default: dev_dbg(scic_to_dev(scic), "%s: SCIC Controller linkup event from phy %d in " - "unexpected state %d\n", __func__, sci_phy->phy_index, - state); + "unexpected state %d\n", __func__, phy->phy_index, + scic->state_machine.current_state_id); + } } - -void scic_sds_controller_link_down( - struct scic_sds_controller *scic, - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) +void scic_sds_controller_link_down(struct scic_sds_controller *scic, + struct scic_sds_port *port, struct scic_sds_phy *phy) { - u32 state; - scic_sds_controller_phy_handler_t link_down; - - state = scic->state_machine.current_state_id; - link_down = scic_sds_controller_state_handler_table[state].link_down; - - if (link_down) - link_down(scic, sci_port, sci_phy); - else + switch (scic->state_machine.current_state_id) { + case SCI_BASE_CONTROLLER_STATE_STARTING: + case SCI_BASE_CONTROLLER_STATE_READY: + scic->port_agent.link_down_handler(scic, &scic->port_agent, + port, phy); + break; + default: dev_dbg(scic_to_dev(scic), "%s: SCIC Controller linkdown event from phy %d in " "unexpected state %d\n", __func__, - sci_phy->phy_index, state); + phy->phy_index, + scic->state_machine.current_state_id); + } } /** @@ -1518,30 +1517,25 @@ static bool scic_sds_controller_has_remote_devices_stopping( /** * This method is called by the remote device to inform the controller * object that the remote device has stopped. - * */ - void scic_sds_controller_remote_device_stopped(struct scic_sds_controller *scic, struct scic_sds_remote_device *sci_dev) { - - u32 state; - scic_sds_controller_device_handler_t stopped; - - state = scic->state_machine.current_state_id; - stopped = scic_sds_controller_state_handler_table[state].device_stopped; - - if (stopped) - stopped(scic, sci_dev); - else { + if (scic->state_machine.current_state_id != + SCI_BASE_CONTROLLER_STATE_STOPPING) { dev_dbg(scic_to_dev(scic), - "%s: SCIC Controller 0x%p remote device stopped event " - "from device 0x%p in unexpected state %d\n", - __func__, scic, sci_dev, state); + "SCIC Controller 0x%p remote device stopped event " + "from device 0x%p in unexpected state %d\n", + scic, sci_dev, + scic->state_machine.current_state_id); + return; } -} - + if (!scic_sds_controller_has_remote_devices_stopping(scic)) { + sci_base_state_machine_change_state(&scic->state_machine, + SCI_BASE_CONTROLLER_STATE_STOPPED); + } +} /** * This method will write to the SCU PCP register the request value. The method @@ -1841,40 +1835,6 @@ static void scic_sds_controller_set_default_config_parameters(struct scic_sds_co } /** - * scic_controller_initialize() - This method will initialize the controller - * hardware managed by the supplied core controller object. This method - * will bring the physical controller hardware out of reset and enable the - * core to determine the capabilities of the hardware being managed. Thus, - * the core controller can determine it's exact physical (DMA capable) - * memory requirements. - * @controller: This parameter specifies the controller to be initialized. - * - * The SCI Core user must have called scic_controller_construct() on the - * supplied controller object previously. Indicate if the controller was - * successfully initialized or if it failed in some way. SCI_SUCCESS This value - * is returned if the controller hardware was successfully initialized. - */ -enum sci_status scic_controller_initialize( - struct scic_sds_controller *scic) -{ - enum sci_status status = SCI_FAILURE_INVALID_STATE; - scic_sds_controller_handler_t initialize; - u32 state; - - state = scic->state_machine.current_state_id; - initialize = scic_sds_controller_state_handler_table[state].initialize; - - if (initialize) - status = initialize(scic); - else - dev_warn(scic_to_dev(scic), - "%s: SCIC Controller initialize operation requested " - "in invalid state %d\n", __func__, state); - - return status; -} - -/** * scic_controller_get_suggested_start_timeout() - This method returns the * suggested scic_controller_start() timeout amount. The user is free to * use any timeout value, but this method provides the suggested minimum @@ -1913,49 +1873,6 @@ u32 scic_controller_get_suggested_start_timeout( } /** - * scic_controller_start() - This method will start the supplied core - * controller. This method will start the staggered spin up operation. The - * SCI User completion callback is called when the following conditions are - * met: -# the return status of this method is SCI_SUCCESS. -# after all of - * the phys have successfully started or been given the opportunity to start. - * @controller: the handle to the controller object to start. - * @timeout: This parameter specifies the number of milliseconds in which the - * start operation should complete. - * - * The SCI Core user must have filled in the physical memory descriptor - * structure via the sci_controller_get_memory_descriptor_list() method. The - * SCI Core user must have invoked the scic_controller_initialize() method - * prior to invoking this method. The controller must be in the INITIALIZED or - * STARTED state. Indicate if the controller start method succeeded or failed - * in some way. SCI_SUCCESS if the start operation succeeded. - * SCI_WARNING_ALREADY_IN_STATE if the controller is already in the STARTED - * state. SCI_FAILURE_INVALID_STATE if the controller is not either in the - * INITIALIZED or STARTED states. SCI_FAILURE_INVALID_MEMORY_DESCRIPTOR if - * there are inconsistent or invalid values in the supplied - * struct sci_physical_memory_descriptor array. - */ -enum sci_status scic_controller_start( - struct scic_sds_controller *scic, - u32 timeout) -{ - enum sci_status status = SCI_FAILURE_INVALID_STATE; - scic_sds_controller_timed_handler_t start; - u32 state; - - state = scic->state_machine.current_state_id; - start = scic_sds_controller_state_handler_table[state].start; - - if (start) - status = start(scic, timeout); - else - dev_warn(scic_to_dev(scic), - "%s: SCIC Controller start operation requested in " - "invalid state %d\n", __func__, state); - - return status; -} - -/** * scic_controller_stop() - This method will stop an individual controller * object.This method will invoke the associated user callback upon * completion. The completion callback is called when the following @@ -1977,21 +1894,18 @@ enum sci_status scic_controller_stop( struct scic_sds_controller *scic, u32 timeout) { - enum sci_status status = SCI_FAILURE_INVALID_STATE; - scic_sds_controller_timed_handler_t stop; - u32 state; - - state = scic->state_machine.current_state_id; - stop = scic_sds_controller_state_handler_table[state].stop; - - if (stop) - status = stop(scic, timeout); - else + if (scic->state_machine.current_state_id != + SCI_BASE_CONTROLLER_STATE_READY) { dev_warn(scic_to_dev(scic), - "%s: SCIC Controller stop operation requested in " - "invalid state %d\n", __func__, state); + "SCIC Controller stop operation requested in " + "invalid state\n"); + return SCI_FAILURE_INVALID_STATE; + } - return status; + isci_timer_start(scic->timeout_timer, timeout); + sci_base_state_machine_change_state(&scic->state_machine, + SCI_BASE_CONTROLLER_STATE_STOPPING); + return SCI_SUCCESS; } /** @@ -2009,21 +1923,24 @@ enum sci_status scic_controller_stop( enum sci_status scic_controller_reset( struct scic_sds_controller *scic) { - enum sci_status status = SCI_FAILURE_INVALID_STATE; - scic_sds_controller_handler_t reset; - u32 state; - - state = scic->state_machine.current_state_id; - reset = scic_sds_controller_state_handler_table[state].reset; - - if (reset) - status = reset(scic); - else + switch (scic->state_machine.current_state_id) { + case SCI_BASE_CONTROLLER_STATE_RESET: + case SCI_BASE_CONTROLLER_STATE_READY: + case SCI_BASE_CONTROLLER_STATE_STOPPED: + case SCI_BASE_CONTROLLER_STATE_FAILED: + /* + * The reset operation is not a graceful cleanup, just + * perform the state transition. + */ + sci_base_state_machine_change_state(&scic->state_machine, + SCI_BASE_CONTROLLER_STATE_RESETTING); + return SCI_SUCCESS; + default: dev_warn(scic_to_dev(scic), - "%s: SCIC Controller reset operation requested in " - "invalid state %d\n", __func__, state); - - return status; + "SCIC Controller reset operation requested in " + "invalid state\n"); + return SCI_FAILURE_INVALID_STATE; + } } /** @@ -2055,19 +1972,25 @@ enum sci_status scic_controller_reset( */ enum sci_io_status scic_controller_start_io( struct scic_sds_controller *scic, - struct scic_sds_remote_device *remote_device, - struct scic_sds_request *request, + struct scic_sds_remote_device *rdev, + struct scic_sds_request *req, u16 io_tag) { - u32 state; - scic_sds_controller_start_request_handler_t start_io; + enum sci_status status; + + if (scic->state_machine.current_state_id != + SCI_BASE_CONTROLLER_STATE_READY) { + dev_warn(scic_to_dev(scic), "invalid state to start I/O"); + return SCI_FAILURE_INVALID_STATE; + } - state = scic->state_machine.current_state_id; - start_io = scic_sds_controller_state_handler_table[state].start_io; + status = scic_sds_remote_device_start_io(scic, rdev, req); + if (status != SCI_SUCCESS) + return status; - return start_io(scic, - (struct sci_base_remote_device *) remote_device, - request, io_tag); + scic->io_request_table[scic_sds_io_tag_get_index(req->io_tag)] = req; + scic_sds_controller_post_request(scic, scic_sds_request_get_post_context(req)); + return SCI_SUCCESS; } /** @@ -2088,18 +2011,30 @@ enum sci_io_status scic_controller_start_io( */ enum sci_status scic_controller_terminate_request( struct scic_sds_controller *scic, - struct scic_sds_remote_device *remote_device, - struct scic_sds_request *request) + struct scic_sds_remote_device *rdev, + struct scic_sds_request *req) { - scic_sds_controller_request_handler_t terminate_request; - u32 state; + enum sci_status status; + + if (scic->state_machine.current_state_id != + SCI_BASE_CONTROLLER_STATE_READY) { + dev_warn(scic_to_dev(scic), + "invalid state to terminate request\n"); + return SCI_FAILURE_INVALID_STATE; + } - state = scic->state_machine.current_state_id; - terminate_request = scic_sds_controller_state_handler_table[state].terminate_request; + status = scic_sds_io_request_terminate(req); + if (status != SCI_SUCCESS) + return status; - return terminate_request(scic, - (struct sci_base_remote_device *)remote_device, - request); + /* + * Utilize the original post context command and or in the POST_TC_ABORT + * request sub-type. + */ + scic_sds_controller_post_request(scic, + scic_sds_request_get_post_context(req) | + SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT); + return SCI_SUCCESS; } /** @@ -2126,18 +2061,44 @@ enum sci_status scic_controller_terminate_request( */ enum sci_status scic_controller_complete_io( struct scic_sds_controller *scic, - struct scic_sds_remote_device *remote_device, + struct scic_sds_remote_device *rdev, struct scic_sds_request *request) { - u32 state; - scic_sds_controller_request_handler_t complete_io; + enum sci_status status; + u16 index; + + switch (scic->state_machine.current_state_id) { + case SCI_BASE_CONTROLLER_STATE_STOPPING: + /* XXX: Implement this function */ + return SCI_FAILURE; + case SCI_BASE_CONTROLLER_STATE_READY: + status = scic_sds_remote_device_complete_io(scic, rdev, request); + if (status != SCI_SUCCESS) + return status; + + index = scic_sds_io_tag_get_index(request->io_tag); + scic->io_request_table[index] = NULL; + return SCI_SUCCESS; + default: + dev_warn(scic_to_dev(scic), "invalid state to complete I/O"); + return SCI_FAILURE_INVALID_STATE; + } + +} + +enum sci_status scic_controller_continue_io(struct scic_sds_request *sci_req) +{ + struct scic_sds_controller *scic = sci_req->owning_controller; - state = scic->state_machine.current_state_id; - complete_io = scic_sds_controller_state_handler_table[state].complete_io; + if (scic->state_machine.current_state_id != + SCI_BASE_CONTROLLER_STATE_READY) { + dev_warn(scic_to_dev(scic), "invalid state to continue I/O"); + return SCI_FAILURE_INVALID_STATE; + } - return complete_io(scic, - (struct sci_base_remote_device *)remote_device, - request); + scic->io_request_table[scic_sds_io_tag_get_index(sci_req->io_tag)] = sci_req; + scic_sds_controller_post_request(scic, scic_sds_request_get_post_context(sci_req)); + return SCI_SUCCESS; } /** @@ -2170,71 +2131,45 @@ enum sci_status scic_controller_complete_io( */ enum sci_task_status scic_controller_start_task( struct scic_sds_controller *scic, - struct scic_sds_remote_device *remote_device, - struct scic_sds_request *task_request, + struct scic_sds_remote_device *rdev, + struct scic_sds_request *req, u16 task_tag) { - u32 state; - scic_sds_controller_start_request_handler_t start_task; - enum sci_task_status status = SCI_TASK_FAILURE_INVALID_STATE; - - state = scic->state_machine.current_state_id; - start_task = scic_sds_controller_state_handler_table[state].start_task; + enum sci_status status; - if (start_task) - status = start_task(scic, - (struct sci_base_remote_device *)remote_device, - task_request, - task_tag); - else + if (scic->state_machine.current_state_id != + SCI_BASE_CONTROLLER_STATE_READY) { dev_warn(scic_to_dev(scic), "%s: SCIC Controller starting task from invalid " "state\n", __func__); + return SCI_TASK_FAILURE_INVALID_STATE; + } - return status; -} - -/** - * scic_controller_complete_task() - This method will perform core specific - * completion operations for task management request. After this method is - * invoked, the user should consider the task request as invalid until it is - * properly reused (i.e. re-constructed). - * @controller: The handle to the controller object for which to complete the - * task management request. - * @remote_device: The handle to the remote device object for which to complete - * the task management request. - * @task_request: the handle to the task management request object to complete. - * - * Indicate if the controller successfully completed the task management - * request. SCI_SUCCESS if the completion process was successful. - */ -enum sci_status scic_controller_complete_task( - struct scic_sds_controller *scic, - struct scic_sds_remote_device *remote_device, - struct scic_sds_request *task_request) -{ - u32 state; - scic_sds_controller_request_handler_t complete_task; - enum sci_status status = SCI_FAILURE_INVALID_STATE; + status = scic_sds_remote_device_start_task(scic, rdev, req); + switch (status) { + case SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS: + scic->io_request_table[scic_sds_io_tag_get_index(req->io_tag)] = req; - state = scic->state_machine.current_state_id; - complete_task = scic_sds_controller_state_handler_table[state].complete_task; + /* + * We will let framework know this task request started successfully, + * although core is still woring on starting the request (to post tc when + * RNC is resumed.) + */ + return SCI_SUCCESS; + case SCI_SUCCESS: + scic->io_request_table[scic_sds_io_tag_get_index(req->io_tag)] = req; - if (complete_task) - status = complete_task(scic, - (struct sci_base_remote_device *)remote_device, - task_request); - else - dev_warn(scic_to_dev(scic), - "%s: SCIC Controller completing task from invalid " - "state\n", - __func__); + scic_sds_controller_post_request(scic, + scic_sds_request_get_post_context(req)); + break; + default: + break; + } return status; } - /** * scic_controller_get_port_handle() - This method simply provides the user * with a unique handle for a given SAS/SATA core port index. @@ -2706,52 +2641,23 @@ struct scic_sds_controller *scic_controller_alloc(struct device *dev) return devm_kzalloc(dev, sizeof(struct scic_sds_controller), GFP_KERNEL); } -static enum sci_status -default_controller_handler(struct scic_sds_controller *scic, const char *func) -{ - dev_warn(scic_to_dev(scic), "%s: invalid state %d\n", func, - scic->state_machine.current_state_id); - - return SCI_FAILURE_INVALID_STATE; -} - -static enum sci_status scic_sds_controller_default_start_operation_handler( - struct scic_sds_controller *scic, - struct sci_base_remote_device *remote_device, - struct scic_sds_request *request, - u16 io_tag) -{ - return default_controller_handler(scic, __func__); -} - -static enum sci_status scic_sds_controller_default_request_handler( - struct scic_sds_controller *scic, - struct sci_base_remote_device *remote_device, - struct scic_sds_request *request) -{ - return default_controller_handler(scic, __func__); -} - -static enum sci_status -scic_sds_controller_general_reset_handler(struct scic_sds_controller *scic) -{ - /* The reset operation is not a graceful cleanup just perform the state - * transition. - */ - sci_base_state_machine_change_state(&scic->state_machine, - SCI_BASE_CONTROLLER_STATE_RESETTING); - - return SCI_SUCCESS; -} - -static enum sci_status -scic_sds_controller_reset_state_initialize_handler(struct scic_sds_controller *scic) +enum sci_status scic_controller_initialize( + struct scic_sds_controller *scic) { struct sci_base_state_machine *sm = &scic->state_machine; enum sci_status result = SCI_SUCCESS; struct isci_host *ihost; u32 index, state; + if (scic->state_machine.current_state_id != + SCI_BASE_CONTROLLER_STATE_RESET) { + dev_warn(scic_to_dev(scic), + "SCIC Controller initialize operation requested " + "in invalid state\n"); + return SCI_FAILURE_INVALID_STATE; + } + + ihost = sci_object_get_association(scic); sci_base_state_machine_change_state(sm, SCI_BASE_CONTROLLER_STATE_INITIALIZING); @@ -2908,30 +2814,19 @@ scic_sds_controller_reset_state_initialize_handler(struct scic_sds_controller *s return result; } -/* - * ***************************************************************************** - * * INITIALIZED STATE HANDLERS - * ***************************************************************************** */ - -/* - * This function is the struct scic_sds_controller start handler for the - * initialized state. - * - Validate we have a good memory descriptor table - Initialze the - * physical memory before programming the hardware - Program the SCU hardware - * with the physical memory addresses passed in the memory descriptor table. - - * Initialzie the TCi pool - Initialize the RNi pool - Initialize the - * completion queue - Initialize the unsolicited frame data - Take the SCU port - * task scheduler out of reset - Start the first phy object. - Transition to - * SCI_BASE_CONTROLLER_STATE_STARTING. enum sci_status SCI_SUCCESS if all of the - * controller start operations complete - * SCI_FAILURE_UNSUPPORTED_INFORMATION_FIELD if one or more of the memory - * descriptor fields is invalid. - */ -static enum sci_status scic_sds_controller_initialized_state_start_handler( - struct scic_sds_controller *scic, u32 timeout) +enum sci_status scic_controller_start(struct scic_sds_controller *scic, + u32 timeout) { - u16 index; enum sci_status result; + u16 index; + + if (scic->state_machine.current_state_id != + SCI_BASE_CONTROLLER_STATE_INITIALIZED) { + dev_warn(scic_to_dev(scic), + "SCIC Controller start operation requested in " + "invalid state\n"); + return SCI_FAILURE_INVALID_STATE; + } /* Build the TCi free pool */ sci_pool_initialize(scic->tci_pool); @@ -2981,376 +2876,6 @@ static enum sci_status scic_sds_controller_initialized_state_start_handler( return SCI_SUCCESS; } -/* - * ***************************************************************************** - * * INITIALIZED STATE HANDLERS - * ***************************************************************************** */ - -/** - * - * @controller: This is struct scic_sds_controller which receives the link up - * notification. - * @port: This is struct scic_sds_port with which the phy is associated. - * @phy: This is the struct scic_sds_phy which has gone link up. - * - * This method is called when the struct scic_sds_controller is in the starting state - * link up handler is called. This method will perform the following: - Stop - * the phy timer - Start the next phy - Report the link up condition to the - * port object none - */ -static void scic_sds_controller_starting_state_link_up_handler( - struct scic_sds_controller *this_controller, - struct scic_sds_port *port, - struct scic_sds_phy *phy) -{ - scic_sds_controller_phy_timer_stop(this_controller); - - this_controller->port_agent.link_up_handler( - this_controller, &this_controller->port_agent, port, phy - ); - /* scic_sds_port_link_up(port, phy); */ - - scic_sds_controller_start_next_phy(this_controller); -} - -/** - * - * @controller: This is struct scic_sds_controller which receives the link down - * notification. - * @port: This is struct scic_sds_port with which the phy is associated. - * @phy: This is the struct scic_sds_phy which has gone link down. - * - * This method is called when the struct scic_sds_controller is in the starting state - * link down handler is called. - Report the link down condition to the port - * object none - */ -static void scic_sds_controller_starting_state_link_down_handler( - struct scic_sds_controller *this_controller, - struct scic_sds_port *port, - struct scic_sds_phy *phy) -{ - this_controller->port_agent.link_down_handler( - this_controller, &this_controller->port_agent, port, phy - ); - /* scic_sds_port_link_down(port, phy); */ -} - -static enum sci_status scic_sds_controller_ready_state_stop_handler( - struct scic_sds_controller *scic, - u32 timeout) -{ - isci_timer_start(scic->timeout_timer, timeout); - sci_base_state_machine_change_state(&scic->state_machine, - SCI_BASE_CONTROLLER_STATE_STOPPING); - return SCI_SUCCESS; -} - -/* - * This method is called when the struct scic_sds_controller is in the ready state and - * the start io handler is called. - Start the io request on the remote device - * - if successful - assign the io_request to the io_request_table - post the - * request to the hardware enum sci_status SCI_SUCCESS if the start io operation - * succeeds SCI_FAILURE_INSUFFICIENT_RESOURCES if the IO tag could not be - * allocated for the io request. SCI_FAILURE_INVALID_STATE if one or more - * objects are not in a valid state to accept io requests. - * - * XXX: How does the io_tag parameter get assigned to the io request? - */ -static enum sci_status scic_sds_controller_ready_state_start_io_handler( - struct scic_sds_controller *controller, - struct sci_base_remote_device *remote_device, - struct scic_sds_request *request, - u16 io_tag) -{ - enum sci_status status; - - struct scic_sds_remote_device *the_device; - - the_device = (struct scic_sds_remote_device *)remote_device; - - status = scic_sds_remote_device_start_io(controller, the_device, request); - - if (status != SCI_SUCCESS) - return status; - - controller->io_request_table[ - scic_sds_io_tag_get_index(request->io_tag)] = request; - scic_sds_controller_post_request(controller, - scic_sds_request_get_post_context(request)); - return SCI_SUCCESS; -} - -/* - * This method is called when the struct scic_sds_controller is in the ready state and - * the complete io handler is called. - Complete the io request on the remote - * device - if successful - remove the io_request to the io_request_table - * enum sci_status SCI_SUCCESS if the start io operation succeeds - * SCI_FAILURE_INVALID_STATE if one or more objects are not in a valid state to - * accept io requests. - */ -static enum sci_status scic_sds_controller_ready_state_complete_io_handler( - struct scic_sds_controller *controller, - struct sci_base_remote_device *remote_device, - struct scic_sds_request *request) -{ - u16 index; - enum sci_status status; - struct scic_sds_remote_device *the_device; - - the_device = (struct scic_sds_remote_device *)remote_device; - - status = scic_sds_remote_device_complete_io(controller, the_device, - request); - if (status != SCI_SUCCESS) - return status; - - index = scic_sds_io_tag_get_index(request->io_tag); - controller->io_request_table[index] = NULL; - return SCI_SUCCESS; -} - -/* - * This method is called when the struct scic_sds_controller is in the ready state and - * the continue io handler is called. enum sci_status - */ -static enum sci_status scic_sds_controller_ready_state_continue_io_handler( - struct scic_sds_controller *controller, - struct sci_base_remote_device *remote_device, - struct scic_sds_request *request) -{ - controller->io_request_table[ - scic_sds_io_tag_get_index(request->io_tag)] = request; - scic_sds_controller_post_request(controller, - scic_sds_request_get_post_context(request)); - return SCI_SUCCESS; -} - -/* - * This method is called when the struct scic_sds_controller is in the ready state and - * the start task handler is called. - The remote device is requested to start - * the task request - if successful - assign the task to the io_request_table - - * post the request to the SCU hardware enum sci_status SCI_SUCCESS if the start io - * operation succeeds SCI_FAILURE_INSUFFICIENT_RESOURCES if the IO tag could - * not be allocated for the io request. SCI_FAILURE_INVALID_STATE if one or - * more objects are not in a valid state to accept io requests. How does the io - * tag get assigned in this code path? - */ -static enum sci_status scic_sds_controller_ready_state_start_task_handler( - struct scic_sds_controller *controller, - struct sci_base_remote_device *remote_device, - struct scic_sds_request *request, - u16 task_tag) -{ - struct scic_sds_remote_device *the_device = (struct scic_sds_remote_device *) - remote_device; - enum sci_status status; - - status = scic_sds_remote_device_start_task(controller, the_device, - request); - - if (status == SCI_SUCCESS) { - controller->io_request_table[ - scic_sds_io_tag_get_index(request->io_tag)] = request; - - scic_sds_controller_post_request(controller, - scic_sds_request_get_post_context(request)); - } else if (status == SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS) { - controller->io_request_table[ - scic_sds_io_tag_get_index(request->io_tag)] = request; - - /* - * We will let framework know this task request started successfully, - * although core is still woring on starting the request (to post tc when - * RNC is resumed.) */ - status = SCI_SUCCESS; - } - return status; -} - -/* - * This method is called when the struct scic_sds_controller is in the ready state and - * the terminate request handler is called. - call the io request terminate - * function - if successful - post the terminate request to the SCU hardware - * enum sci_status SCI_SUCCESS if the start io operation succeeds - * SCI_FAILURE_INVALID_STATE if one or more objects are not in a valid state to - * accept io requests. - */ -static enum sci_status scic_sds_controller_ready_state_terminate_request_handler( - struct scic_sds_controller *controller, - struct sci_base_remote_device *remote_device, - struct scic_sds_request *request) -{ - enum sci_status status; - - status = scic_sds_io_request_terminate(request); - if (status != SCI_SUCCESS) - return status; - - /* - * Utilize the original post context command and or in the POST_TC_ABORT - * request sub-type. - */ - scic_sds_controller_post_request(controller, - scic_sds_request_get_post_context(request) | - SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT); - return SCI_SUCCESS; -} - -/** - * - * @controller: This is struct scic_sds_controller which receives the link up - * notification. - * @port: This is struct scic_sds_port with which the phy is associated. - * @phy: This is the struct scic_sds_phy which has gone link up. - * - * This method is called when the struct scic_sds_controller is in the starting state - * link up handler is called. This method will perform the following: - Stop - * the phy timer - Start the next phy - Report the link up condition to the - * port object none - */ -static void scic_sds_controller_ready_state_link_up_handler( - struct scic_sds_controller *this_controller, - struct scic_sds_port *port, - struct scic_sds_phy *phy) -{ - this_controller->port_agent.link_up_handler( - this_controller, &this_controller->port_agent, port, phy - ); -} - -/** - * - * @controller: This is struct scic_sds_controller which receives the link down - * notification. - * @port: This is struct scic_sds_port with which the phy is associated. - * @phy: This is the struct scic_sds_phy which has gone link down. - * - * This method is called when the struct scic_sds_controller is in the starting state - * link down handler is called. - Report the link down condition to the port - * object none - */ -static void scic_sds_controller_ready_state_link_down_handler( - struct scic_sds_controller *this_controller, - struct scic_sds_port *port, - struct scic_sds_phy *phy) -{ - this_controller->port_agent.link_down_handler( - this_controller, &this_controller->port_agent, port, phy - ); -} - -/* - * ***************************************************************************** - * * STOPPING STATE HANDLERS - * ***************************************************************************** */ - -/** - * This method is called when the struct scic_sds_controller is in a stopping state - * and the complete io handler is called. - This function is not yet - * implemented enum sci_status SCI_FAILURE - */ -static enum sci_status scic_sds_controller_stopping_state_complete_io_handler( - struct scic_sds_controller *controller, - struct sci_base_remote_device *remote_device, - struct scic_sds_request *request) -{ - /* XXX: Implement this function */ - return SCI_FAILURE; -} - -/** - * This method is called when the struct scic_sds_controller is in a stopping state - * and the remote device has stopped. - **/ -static void scic_sds_controller_stopping_state_device_stopped_handler( - struct scic_sds_controller *controller, - struct scic_sds_remote_device *remote_device -) -{ - if (!scic_sds_controller_has_remote_devices_stopping(controller)) { - sci_base_state_machine_change_state(&controller->state_machine, - SCI_BASE_CONTROLLER_STATE_STOPPED - ); - } -} - -const struct scic_sds_controller_state_handler scic_sds_controller_state_handler_table[] = { - [SCI_BASE_CONTROLLER_STATE_INITIAL] = { - .start_io = scic_sds_controller_default_start_operation_handler, - .complete_io = scic_sds_controller_default_request_handler, - .continue_io = scic_sds_controller_default_request_handler, - .terminate_request = scic_sds_controller_default_request_handler, - }, - [SCI_BASE_CONTROLLER_STATE_RESET] = { - .reset = scic_sds_controller_general_reset_handler, - .initialize = scic_sds_controller_reset_state_initialize_handler, - .start_io = scic_sds_controller_default_start_operation_handler, - .complete_io = scic_sds_controller_default_request_handler, - .continue_io = scic_sds_controller_default_request_handler, - .terminate_request = scic_sds_controller_default_request_handler, - }, - [SCI_BASE_CONTROLLER_STATE_INITIALIZING] = { - .start_io = scic_sds_controller_default_start_operation_handler, - .complete_io = scic_sds_controller_default_request_handler, - .continue_io = scic_sds_controller_default_request_handler, - .terminate_request = scic_sds_controller_default_request_handler, - }, - [SCI_BASE_CONTROLLER_STATE_INITIALIZED] = { - .start = scic_sds_controller_initialized_state_start_handler, - .start_io = scic_sds_controller_default_start_operation_handler, - .complete_io = scic_sds_controller_default_request_handler, - .continue_io = scic_sds_controller_default_request_handler, - .terminate_request = scic_sds_controller_default_request_handler, - }, - [SCI_BASE_CONTROLLER_STATE_STARTING] = { - .start_io = scic_sds_controller_default_start_operation_handler, - .complete_io = scic_sds_controller_default_request_handler, - .continue_io = scic_sds_controller_default_request_handler, - .terminate_request = scic_sds_controller_default_request_handler, - .link_up = scic_sds_controller_starting_state_link_up_handler, - .link_down = scic_sds_controller_starting_state_link_down_handler - }, - [SCI_BASE_CONTROLLER_STATE_READY] = { - .stop = scic_sds_controller_ready_state_stop_handler, - .reset = scic_sds_controller_general_reset_handler, - .start_io = scic_sds_controller_ready_state_start_io_handler, - .complete_io = scic_sds_controller_ready_state_complete_io_handler, - .continue_io = scic_sds_controller_ready_state_continue_io_handler, - .start_task = scic_sds_controller_ready_state_start_task_handler, - .complete_task = scic_sds_controller_ready_state_complete_io_handler, - .terminate_request = scic_sds_controller_ready_state_terminate_request_handler, - .link_up = scic_sds_controller_ready_state_link_up_handler, - .link_down = scic_sds_controller_ready_state_link_down_handler - }, - [SCI_BASE_CONTROLLER_STATE_RESETTING] = { - .start_io = scic_sds_controller_default_start_operation_handler, - .complete_io = scic_sds_controller_default_request_handler, - .continue_io = scic_sds_controller_default_request_handler, - .terminate_request = scic_sds_controller_default_request_handler, - }, - [SCI_BASE_CONTROLLER_STATE_STOPPING] = { - .start_io = scic_sds_controller_default_start_operation_handler, - .complete_io = scic_sds_controller_stopping_state_complete_io_handler, - .continue_io = scic_sds_controller_default_request_handler, - .terminate_request = scic_sds_controller_default_request_handler, - .device_stopped = scic_sds_controller_stopping_state_device_stopped_handler, - }, - [SCI_BASE_CONTROLLER_STATE_STOPPED] = { - .reset = scic_sds_controller_general_reset_handler, - .start_io = scic_sds_controller_default_start_operation_handler, - .complete_io = scic_sds_controller_default_request_handler, - .continue_io = scic_sds_controller_default_request_handler, - .terminate_request = scic_sds_controller_default_request_handler, - }, - [SCI_BASE_CONTROLLER_STATE_FAILED] = { - .reset = scic_sds_controller_general_reset_handler, - .start_io = scic_sds_controller_default_start_operation_handler, - .complete_io = scic_sds_controller_default_request_handler, - .continue_io = scic_sds_controller_default_request_handler, - .terminate_request = scic_sds_controller_default_request_handler, - }, -}; - /** * * @object: This is the struct sci_base_object which is cast to a struct scic_sds_controller diff --git a/drivers/scsi/isci/core/scic_sds_controller.h b/drivers/scsi/isci/core/scic_sds_controller.h index 163a9e1..9a646e5 100644 --- a/drivers/scsi/isci/core/scic_sds_controller.h +++ b/drivers/scsi/isci/core/scic_sds_controller.h @@ -430,90 +430,6 @@ enum scic_sds_controller_states { }; -typedef enum sci_status (*scic_sds_controller_handler_t) - (struct scic_sds_controller *); -typedef enum sci_status (*scic_sds_controller_timed_handler_t) - (struct scic_sds_controller *, u32); -typedef enum sci_status (*scic_sds_controller_request_handler_t) - (struct scic_sds_controller *, - struct sci_base_remote_device *, - struct scic_sds_request *); -typedef enum sci_status (*scic_sds_controller_start_request_handler_t) - (struct scic_sds_controller *, - struct sci_base_remote_device *, - struct scic_sds_request *, u16); -typedef void (*scic_sds_controller_phy_handler_t) - (struct scic_sds_controller *, - struct scic_sds_port *, - struct scic_sds_phy *); -typedef void (*scic_sds_controller_device_handler_t) - (struct scic_sds_controller *, - struct scic_sds_remote_device *); - -struct scic_sds_controller_state_handler { - /** - * The start_handler specifies the method invoked when a user attempts to - * start a controller. - */ - scic_sds_controller_timed_handler_t start; - - /** - * The stop_handler specifies the method invoked when a user attempts to - * stop a controller. - */ - scic_sds_controller_timed_handler_t stop; - - /** - * The reset_handler specifies the method invoked when a user attempts to - * reset a controller. - */ - scic_sds_controller_handler_t reset; - - /** - * The initialize_handler specifies the method invoked when a user - * attempts to initialize a controller. - */ - scic_sds_controller_handler_t initialize; - - /** - * The start_io_handler specifies the method invoked when a user - * attempts to start an IO request for a controller. - */ - scic_sds_controller_start_request_handler_t start_io; - - /** - * The complete_io_handler specifies the method invoked when a user - * attempts to complete an IO request for a controller. - */ - scic_sds_controller_request_handler_t complete_io; - - /** - * The continue_io_handler specifies the method invoked when a user - * attempts to continue an IO request for a controller. - */ - scic_sds_controller_request_handler_t continue_io; - - /** - * The start_task_handler specifies the method invoked when a user - * attempts to start a task management request for a controller. - */ - scic_sds_controller_start_request_handler_t start_task; - - /** - * The complete_task_handler specifies the method invoked when a user - * attempts to complete a task management request for a controller. - */ - scic_sds_controller_request_handler_t complete_task; - - scic_sds_controller_request_handler_t terminate_request; - scic_sds_controller_phy_handler_t link_up; - scic_sds_controller_phy_handler_t link_down; - scic_sds_controller_device_handler_t device_stopped; -}; - -extern const struct scic_sds_controller_state_handler - scic_sds_controller_state_handler_table[]; - /** * INCREMENT_QUEUE_GET() - * @@ -676,4 +592,6 @@ void scic_sds_controller_copy_task_context( void scic_sds_controller_register_setup( struct scic_sds_controller *this_controller); +enum sci_status scic_controller_continue_io(struct scic_sds_request *sci_req); + #endif /* _SCIC_SDS_CONTROLLER_H_ */ diff --git a/drivers/scsi/isci/core/scic_sds_remote_device.c b/drivers/scsi/isci/core/scic_sds_remote_device.c index cb49a33..f0d1c09 100644 --- a/drivers/scsi/isci/core/scic_sds_remote_device.c +++ b/drivers/scsi/isci/core/scic_sds_remote_device.c @@ -558,17 +558,10 @@ void scic_sds_remote_device_start_request( void scic_sds_remote_device_continue_request(void *dev) { struct scic_sds_remote_device *sci_dev = dev; - struct scic_sds_request *sci_req = sci_dev->working_request; /* we need to check if this request is still valid to continue. */ - if (sci_req) { - struct scic_sds_controller *scic = sci_req->owning_controller; - u32 state = scic->state_machine.current_state_id; - scic_sds_controller_request_handler_t continue_io; - - continue_io = scic_sds_controller_state_handler_table[state].continue_io; - continue_io(scic, &sci_req->target_device->parent, sci_req); - } + if (sci_dev->working_request) + scic_controller_continue_io(sci_dev->working_request); } /** diff --git a/drivers/scsi/isci/core/scic_sds_stp_request.c b/drivers/scsi/isci/core/scic_sds_stp_request.c index 0b3bc65..e4ca4e4 100644 --- a/drivers/scsi/isci/core/scic_sds_stp_request.c +++ b/drivers/scsi/isci/core/scic_sds_stp_request.c @@ -637,10 +637,7 @@ static enum sci_status scic_sds_stp_request_pio_data_out_trasmit_data_frame( u32 length) { struct scic_sds_stp_request *this_sds_stp_request = (struct scic_sds_stp_request *)this_request; - scic_sds_controller_request_handler_t continue_io; struct scu_sgl_element *current_sgl; - struct scic_sds_controller *scic; - u32 state; /* * Recycle the TC and reconstruct it for sending out DATA FIS containing @@ -662,10 +659,7 @@ static enum sci_status scic_sds_stp_request_pio_data_out_trasmit_data_frame( task_context->type.stp.fis_type = SATA_FIS_TYPE_DATA; /* send the new TC out. */ - scic = this_request->owning_controller; - state = scic->state_machine.current_state_id; - continue_io = scic_sds_controller_state_handler_table[state].continue_io; - return continue_io(scic, &this_request->target_device->parent, this_request); + return scic_controller_continue_io(this_request); } /** @@ -1758,12 +1752,9 @@ static void scic_sds_stp_request_started_soft_reset_await_h2d_diagnostic_complet struct sci_base_object *object) { struct scic_sds_request *this_request = (struct scic_sds_request *)object; - scic_sds_controller_request_handler_t continue_io; struct scu_task_context *task_context; struct sata_fis_reg_h2d *h2d_fis; - struct scic_sds_controller *scic; enum sci_status status; - u32 state; /* Clear the SRST bit */ h2d_fis = scic_stp_io_request_get_h2d_reg_address(this_request); @@ -1774,12 +1765,7 @@ static void scic_sds_stp_request_started_soft_reset_await_h2d_diagnostic_complet this_request->owning_controller, this_request->io_tag); task_context->control_frame = 0; - scic = this_request->owning_controller; - state = scic->state_machine.current_state_id; - continue_io = scic_sds_controller_state_handler_table[state].continue_io; - - status = continue_io(scic, &this_request->target_device->parent, this_request); - + status = scic_controller_continue_io(this_request); if (status == SCI_SUCCESS) { SET_STATE_HANDLER( this_request, diff --git a/drivers/scsi/isci/task.c b/drivers/scsi/isci/task.c index c6c97ad..aa6b430 100644 --- a/drivers/scsi/isci/task.c +++ b/drivers/scsi/isci/task.c @@ -1480,7 +1480,7 @@ void isci_task_request_complete( /* PRINT_TMF( ((struct isci_tmf *)request->task)); */ tmf_complete = tmf->complete; - scic_controller_complete_task( + scic_controller_complete_io( isci_host->core_controller, to_sci_dev(isci_device), request->sci_request_handle -- 2.7.4