diff options
| -rw-r--r-- | drivers/scsi/isci/port.c | 432 | ||||
| -rw-r--r-- | drivers/scsi/isci/port.h | 55 |
2 files changed, 59 insertions, 428 deletions
diff --git a/drivers/scsi/isci/port.c b/drivers/scsi/isci/port.c index 61ba37da437d..f43c1f6c9669 100644 --- a/drivers/scsi/isci/port.c +++ b/drivers/scsi/isci/port.c @@ -61,8 +61,6 @@ #define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000) #define SCU_DUMMY_INDEX (0xFFFF) -static struct scic_sds_port_state_handler scic_sds_port_state_handler_table[]; - static void isci_port_change_state(struct isci_port *iport, enum isci_status status) { unsigned long flags; @@ -929,40 +927,6 @@ bool scic_sds_port_link_detected( } /** - * This method is called to start an IO request on this port. - * @sci_port: - * @sci_dev: - * @sci_req: - * - * enum sci_status - */ -enum sci_status scic_sds_port_start_io( - struct scic_sds_port *sci_port, - struct scic_sds_remote_device *sci_dev, - struct scic_sds_request *sci_req) -{ - return sci_port->state_handlers->start_io_handler( - sci_port, sci_dev, sci_req); -} - -/** - * This method is called to complete an IO request to the port. - * @sci_port: - * @sci_dev: - * @sci_req: - * - * enum sci_status - */ -enum sci_status scic_sds_port_complete_io( - struct scic_sds_port *sci_port, - struct scic_sds_remote_device *sci_dev, - struct scic_sds_request *sci_req) -{ - return sci_port->state_handlers->complete_io_handler( - sci_port, sci_dev, sci_req); -} - -/** * This method is provided to timeout requests for port operations. Mostly its * for the port reset operation. * @@ -1085,106 +1049,6 @@ static void scic_port_enable_broadcast_change_notification(struct scic_sds_port } } -/* - * **************************************************************************** - * * READY SUBSTATE HANDLERS - * **************************************************************************** */ - -/* - * This method is the general ready substate complete io handler for the - * struct scic_sds_port object. This function decrments the outstanding request count - * for this port object. enum sci_status SCI_SUCCESS - */ -static enum sci_status scic_sds_port_ready_substate_complete_io_handler( - struct scic_sds_port *port, - struct scic_sds_remote_device *device, - struct scic_sds_request *io_request) -{ - scic_sds_port_decrement_request_count(port); - - return SCI_SUCCESS; -} - -/* - * 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 - * request is failed. enum sci_status SCI_FAILURE_INVALID_STATE - */ -static enum sci_status scic_sds_port_ready_waiting_substate_start_io_handler( - struct scic_sds_port *port, - struct scic_sds_remote_device *device, - struct scic_sds_request *io_request) -{ - return SCI_FAILURE_INVALID_STATE; -} - -/* - * This method is the ready operational substate start io handler for the - * struct scic_sds_port object. This function incremetns the outstanding request - * count for this port object. enum sci_status SCI_SUCCESS - */ -static enum sci_status scic_sds_port_ready_operational_substate_start_io_handler( - struct scic_sds_port *port, - struct scic_sds_remote_device *device, - struct scic_sds_request *io_request) -{ - port->started_request_count++; - return SCI_SUCCESS; -} - -/** - * scic_sds_port_ready_configuring_substate_complete_io_handler() - - * @port: This is the port that is being requested to complete the io request. - * @device: This is the device on which the io is completing. - * - * This method will decrement the outstanding request count for this port. If - * the request count goes to 0 then the port can be reprogrammed with its new - * phy data. - */ -static enum sci_status -scic_sds_port_ready_configuring_substate_complete_io_handler( - struct scic_sds_port *port, - struct scic_sds_remote_device *device, - struct scic_sds_request *io_request) -{ - scic_sds_port_decrement_request_count(port); - - if (port->started_request_count == 0) { - port_state_machine_change(port, - SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); - } - - return SCI_SUCCESS; -} - -static enum sci_status default_port_handler(struct scic_sds_port *sci_port, - const char *func) -{ - dev_warn(sciport_to_dev(sci_port), - "%s: in wrong state: %d\n", func, - sci_base_state_machine_get_state(&sci_port->state_machine)); - return SCI_FAILURE_INVALID_STATE; -} - -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) -{ - return default_port_handler(sci_port, __func__); -} - -static enum sci_status scic_sds_port_default_complete_io_handler(struct scic_sds_port *sci_port, - struct scic_sds_remote_device *sci_dev, - struct scic_sds_request *sci_req) -{ - return default_port_handler(sci_port, __func__); -} - -/* - * ****************************************************************************** - * * PORT STATE PRIVATE METHODS - * ****************************************************************************** */ - /** * * @sci_port: This is the struct scic_sds_port object to suspend. @@ -1269,28 +1133,10 @@ scic_sds_port_resume_port_task_scheduler(struct scic_sds_port *port) writel(pts_control_value, &port->port_task_scheduler_registers->control); } -/* - * ****************************************************************************** - * * PORT READY SUBSTATE METHODS - * ****************************************************************************** */ - -/** - * - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This method will perform the actions required by the struct scic_sds_port on - * entering the SCIC_SDS_PORT_READY_SUBSTATE_WAITING. This function checks the - * port for any ready phys. If there is at least one phy in a ready state then - * the port transitions to the ready operational substate. none - */ static void scic_sds_port_ready_substate_waiting_enter(void *object) { struct scic_sds_port *sci_port = object; - scic_sds_port_set_base_state_handlers( - sci_port, SCIC_SDS_PORT_READY_SUBSTATE_WAITING - ); - scic_sds_port_suspend_port_task_scheduler(sci_port); sci_port->not_ready_reason = SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS; @@ -1302,15 +1148,6 @@ static void scic_sds_port_ready_substate_waiting_enter(void *object) } } -/** - * - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This function will perform the actions required by the struct scic_sds_port - * on entering the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function sets - * the state handlers for the port object, notifies the SCI User that the port - * is ready, and resumes port operations. none - */ static void scic_sds_port_ready_substate_operational_enter(void *object) { u32 index; @@ -1319,10 +1156,6 @@ static void scic_sds_port_ready_substate_operational_enter(void *object) struct isci_host *ihost = scic_to_ihost(scic); struct isci_port *iport = sci_port_to_iport(sci_port); - scic_sds_port_set_base_state_handlers( - sci_port, - SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); - isci_port_ready(ihost, iport); for (index = 0; index < SCI_MAX_PHYS; index++) { @@ -1397,19 +1230,6 @@ static void scic_sds_port_ready_substate_operational_exit(void *object) scic_sds_port_invalidate_dummy_remote_node(sci_port); } -/* - * ****************************************************************************** - * * PORT READY CONFIGURING METHODS - * ****************************************************************************** */ - -/** - * scic_sds_port_ready_substate_configuring_enter() - - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This method will perform the actions required by the struct scic_sds_port on - * exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports - * the port not ready and suspends the port task scheduler. none - */ static void scic_sds_port_ready_substate_configuring_enter(void *object) { struct scic_sds_port *sci_port = object; @@ -1417,10 +1237,6 @@ static void scic_sds_port_ready_substate_configuring_enter(void *object) struct isci_host *ihost = scic_to_ihost(scic); struct isci_port *iport = sci_port_to_iport(sci_port); - scic_sds_port_set_base_state_handlers( - sci_port, - SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING); - if (sci_port->active_phy_mask == 0) { isci_port_not_ready(ihost, iport); @@ -1440,50 +1256,6 @@ static void scic_sds_port_ready_substate_configuring_exit(void *object) scic_sds_port_invalidate_dummy_remote_node(sci_port); } -/* --------------------------------------------------------------------------- */ - -/** - * - * @port: This is the struct scic_sds_port object on which the io request count will - * be decremented. - * @device: This is the struct scic_sds_remote_device object to which the io request - * is being directed. This parameter is not required to complete this - * operation. - * @io_request: This is the request that is being completed on this port - * object. This parameter is not required to complete this operation. - * - * This is a general complete io request handler for the struct scic_sds_port object. - * enum sci_status SCI_SUCCESS - */ -static enum sci_status scic_sds_port_general_complete_io_handler( - struct scic_sds_port *port, - struct scic_sds_remote_device *device, - struct scic_sds_request *io_request) -{ - scic_sds_port_decrement_request_count(port); - - return SCI_SUCCESS; -} - -/* - * This method takes the struct scic_sds_port that is in a stopping state and handles - * the complete io request. Should the request count reach 0 then the port - * object will transition to the stopped state. enum sci_status SCI_SUCCESS - */ -static enum sci_status scic_sds_port_stopping_state_complete_io_handler( - struct scic_sds_port *sci_port, - struct scic_sds_remote_device *device, - struct scic_sds_request *io_request) -{ - scic_sds_port_decrement_request_count(sci_port); - - if (sci_port->started_request_count == 0) - port_state_machine_change(sci_port, - SCI_BASE_PORT_STATE_STOPPED); - - return SCI_SUCCESS; -} - enum sci_status scic_sds_port_start(struct scic_sds_port *sci_port) { struct scic_sds_controller *scic = sci_port->owning_controller; @@ -1818,45 +1590,62 @@ enum sci_status scic_sds_port_link_down(struct scic_sds_port *sci_port, } } -static struct scic_sds_port_state_handler scic_sds_port_state_handler_table[] = { - [SCI_BASE_PORT_STATE_STOPPED] = { - .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] = { - .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] = { - .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] = { - .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] = { - .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] = { - .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] = { - .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] = { - .start_io_handler = scic_sds_port_default_start_io_handler, - .complete_io_handler = scic_sds_port_general_complete_io_handler +enum sci_status scic_sds_port_start_io(struct scic_sds_port *sci_port, + struct scic_sds_remote_device *sci_dev, + struct scic_sds_request *sci_req) +{ + enum scic_sds_port_states state; + + state = sci_port->state_machine.current_state_id; + switch (state) { + case SCIC_SDS_PORT_READY_SUBSTATE_WAITING: + return SCI_FAILURE_INVALID_STATE; + case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL: + sci_port->started_request_count++; + return SCI_SUCCESS; + default: + dev_warn(sciport_to_dev(sci_port), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; } -}; +} -/* - * ****************************************************************************** - * * PORT STATE PRIVATE METHODS - * ****************************************************************************** */ +enum sci_status scic_sds_port_complete_io(struct scic_sds_port *sci_port, + struct scic_sds_remote_device *sci_dev, + struct scic_sds_request *sci_req) +{ + enum scic_sds_port_states state; + + state = sci_port->state_machine.current_state_id; + switch (state) { + case SCI_BASE_PORT_STATE_STOPPED: + dev_warn(sciport_to_dev(sci_port), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + case SCI_BASE_PORT_STATE_STOPPING: + scic_sds_port_decrement_request_count(sci_port); + + if (sci_port->started_request_count == 0) + port_state_machine_change(sci_port, + SCI_BASE_PORT_STATE_STOPPED); + break; + case SCI_BASE_PORT_STATE_READY: + case SCI_BASE_PORT_STATE_RESETTING: + case SCI_BASE_PORT_STATE_FAILED: + case SCIC_SDS_PORT_READY_SUBSTATE_WAITING: + case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL: + scic_sds_port_decrement_request_count(sci_port); + break; + case SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING: + scic_sds_port_decrement_request_count(sci_port); + if (sci_port->started_request_count == 0) { + port_state_machine_change(sci_port, + SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); + } + break; + } + return SCI_SUCCESS; +} /** * @@ -1921,32 +1710,11 @@ static void scic_sds_port_post_dummy_remote_node(struct scic_sds_port *sci_port) scic_sds_controller_post_request(scic, command); } -/* - * ****************************************************************************** - * * PORT STATE METHODS - * ****************************************************************************** */ - -/** - * - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This method will perform the actions required by the struct scic_sds_port on - * entering the SCI_BASE_PORT_STATE_STOPPED. This function sets the stopped - * state handlers for the struct scic_sds_port object and disables the port task - * scheduler in the hardware. none - */ static void scic_sds_port_stopped_state_enter(void *object) { struct scic_sds_port *sci_port = object; - scic_sds_port_set_base_state_handlers( - sci_port, SCI_BASE_PORT_STATE_STOPPED - ); - - if ( - SCI_BASE_PORT_STATE_STOPPING - == sci_port->state_machine.previous_state_id - ) { + if (sci_port->state_machine.previous_state_id == SCI_BASE_PORT_STATE_STOPPING) { /* * If we enter this state becasuse of a request to stop * the port then we want to disable the hardwares port @@ -1955,14 +1723,6 @@ static void scic_sds_port_stopped_state_enter(void *object) } } -/** - * - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This method will perform the actions required by the struct scic_sds_port on - * exiting the SCI_BASE_STATE_STOPPED. This function enables the SCU hardware - * port task scheduler. none - */ static void scic_sds_port_stopped_state_exit(void *object) { struct scic_sds_port *sci_port = object; @@ -1971,15 +1731,6 @@ static void scic_sds_port_stopped_state_exit(void *object) scic_sds_port_enable_port_task_scheduler(sci_port); } -/** - * scic_sds_port_ready_state_enter - - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This method will perform the actions required by the struct scic_sds_port on - * entering the SCI_BASE_PORT_STATE_READY. This function sets the ready state - * handlers for the struct scic_sds_port object, reports the port object as - * not ready and starts the ready substate machine. none - */ static void scic_sds_port_ready_state_enter(void *object) { struct scic_sds_port *sci_port = object; @@ -1988,9 +1739,6 @@ static void scic_sds_port_ready_state_enter(void *object) struct isci_port *iport = sci_port_to_iport(sci_port); u32 prev_state; - /* Put the ready state handlers in place though they will not be there long */ - scic_sds_port_set_base_state_handlers(sci_port, SCI_BASE_PORT_STATE_READY); - prev_state = sci_port->state_machine.previous_state_id; if (prev_state == SCI_BASE_PORT_STATE_RESETTING) isci_port_hard_reset_complete(iport, SCI_SUCCESS); @@ -2005,66 +1753,14 @@ static void scic_sds_port_ready_state_enter(void *object) SCIC_SDS_PORT_READY_SUBSTATE_WAITING); } -/** - * - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This method will perform the actions required by the struct scic_sds_port on - * entering the SCI_BASE_PORT_STATE_RESETTING. This function sets the resetting - * state handlers for the struct scic_sds_port object. none - */ -static void scic_sds_port_resetting_state_enter(void *object) -{ - struct scic_sds_port *sci_port = object; - - scic_sds_port_set_base_state_handlers( - sci_port, SCI_BASE_PORT_STATE_RESETTING - ); -} - -/** - * - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This function will perform the actions required by the - * struct scic_sds_port on - * exiting the SCI_BASE_STATE_RESETTING. This function does nothing. none - */ -static inline void scic_sds_port_resetting_state_exit(void *object) +static void scic_sds_port_resetting_state_exit(void *object) { struct scic_sds_port *sci_port = object; isci_timer_stop(sci_port->timer_handle); } -/** - * - * @object: This is the void object which is cast to a - * struct scic_sds_port object. - * - * This method will perform the actions required by the struct scic_sds_port on - * entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping - * state handlers for the struct scic_sds_port object. none - */ -static void scic_sds_port_stopping_state_enter(void *object) -{ - struct scic_sds_port *sci_port = object; - - scic_sds_port_set_base_state_handlers( - sci_port, SCI_BASE_PORT_STATE_STOPPING - ); -} - -/** - * - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This function will perform the actions required by the - * struct scic_sds_port on - * exiting the SCI_BASE_STATE_STOPPING. This function does nothing. none - */ -static inline void -scic_sds_port_stopping_state_exit(void *object) +static void scic_sds_port_stopping_state_exit(void *object) { struct scic_sds_port *sci_port = object; @@ -2073,23 +1769,11 @@ scic_sds_port_stopping_state_exit(void *object) scic_sds_port_destroy_dummy_resources(sci_port); } -/** - * - * @object: This is the object which is cast to a struct scic_sds_port object. - * - * This function will perform the actions required by the - * struct scic_sds_port on - * entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping - * state handlers for the struct scic_sds_port object. none - */ static void scic_sds_port_failed_state_enter(void *object) { struct scic_sds_port *sci_port = object; struct isci_port *iport = sci_port_to_iport(sci_port); - scic_sds_port_set_base_state_handlers(sci_port, - SCI_BASE_PORT_STATE_FAILED); - isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT); } @@ -2101,7 +1785,6 @@ static const struct sci_base_state scic_sds_port_state_table[] = { .exit_state = scic_sds_port_stopped_state_exit }, [SCI_BASE_PORT_STATE_STOPPING] = { - .enter_state = scic_sds_port_stopping_state_enter, .exit_state = scic_sds_port_stopping_state_exit }, [SCI_BASE_PORT_STATE_READY] = { @@ -2119,7 +1802,6 @@ static const struct sci_base_state scic_sds_port_state_table[] = { .exit_state = scic_sds_port_ready_substate_configuring_exit }, [SCI_BASE_PORT_STATE_RESETTING] = { - .enter_state = scic_sds_port_resetting_state_enter, .exit_state = scic_sds_port_resetting_state_exit }, [SCI_BASE_PORT_STATE_FAILED] = { diff --git a/drivers/scsi/isci/port.h b/drivers/scsi/isci/port.h index bbce0ec583a9..af540e5c03a0 100644 --- a/drivers/scsi/isci/port.h +++ b/drivers/scsi/isci/port.h @@ -145,15 +145,6 @@ struct scic_sds_port { void *timer_handle; /** - * This field points to the current set of state handlers for this port - * object. These state handlers are assigned at each enter state of - * the state machine. - */ - struct scic_sds_port_state_handler *state_handlers; - - /* / Memory mapped hardware register space */ - - /** * This field is the pointer to the port task scheduler registers * for the SCU hardware. */ @@ -286,34 +277,7 @@ enum scic_sds_port_states { */ SCI_BASE_PORT_STATE_FAILED, - SCI_BASE_PORT_MAX_STATES - -}; - -struct scic_sds_remote_device; -struct scic_sds_request; - -typedef enum sci_status (*scic_sds_port_handler_t)(struct scic_sds_port *); - -typedef enum sci_status (*scic_sds_port_phy_handler_t)(struct scic_sds_port *, - struct scic_sds_phy *); - -typedef enum sci_status (*scic_sds_port_reset_handler_t)(struct scic_sds_port *, - u32 timeout); - -typedef enum sci_status (*scic_sds_port_event_handler_t)(struct scic_sds_port *, u32); -typedef enum sci_status (*scic_sds_port_frame_handler_t)(struct scic_sds_port *, u32); - -typedef void (*scic_sds_port_link_handler_t)(struct scic_sds_port *, struct scic_sds_phy *); - -typedef enum sci_status (*scic_sds_port_io_request_handler_t)(struct scic_sds_port *, - struct scic_sds_remote_device *, - struct scic_sds_request *); - -struct scic_sds_port_state_handler { - scic_sds_port_io_request_handler_t start_io_handler; - scic_sds_port_io_request_handler_t complete_io_handler; }; /** @@ -325,23 +289,6 @@ struct scic_sds_port_state_handler { ((this_port)->owning_controller) /** - * scic_sds_port_set_base_state_handlers() - - * - * This macro will change the state handlers to those of the specified state id - */ -#define scic_sds_port_set_base_state_handlers(this_port, state_id) \ - scic_sds_port_set_state_handlers(\ - (this_port), &scic_sds_port_state_handler_table[(state_id)]) - -/** - * scic_sds_port_set_state_handlers() - - * - * Helper macro to set the port object state handlers - */ -#define scic_sds_port_set_state_handlers(this_port, handlers) \ - ((this_port)->state_handlers = (handlers)) - -/** * scic_sds_port_get_index() - * * This macro returns the physical port index for this port object @@ -404,6 +351,8 @@ enum sci_status scic_sds_port_link_up(struct scic_sds_port *sci_port, enum sci_status scic_sds_port_link_down(struct scic_sds_port *sci_port, struct scic_sds_phy *sci_phy); +struct scic_sds_request; +struct scic_sds_remote_device; enum sci_status scic_sds_port_start_io( struct scic_sds_port *sci_port, struct scic_sds_remote_device *sci_dev, |
