isci: move remote_device handling out of the core
Now that the core/lldd remote_device data structures are nominally unified
merge the corresponding sources into the top-level directory. Also move the
remote_node_context infrastructure which has no analog at the lldd level.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/scsi/isci/remote_device.c b/drivers/scsi/isci/remote_device.c
index 1553221..6b9ea90 100644
--- a/drivers/scsi/isci/remote_device.c
+++ b/drivers/scsi/isci/remote_device.c
@@ -52,19 +52,1170 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-
+#include "intel_sas.h"
#include "isci.h"
-#include "scic_io_request.h"
-#include "scic_remote_device.h"
-#include "scic_phy.h"
-#include "scic_port.h"
#include "port.h"
#include "remote_device.h"
#include "request.h"
+#include "scic_controller.h"
+#include "scic_io_request.h"
+#include "scic_phy.h"
+#include "scic_port.h"
+#include "scic_sds_controller.h"
+#include "scic_sds_phy.h"
+#include "scic_sds_port.h"
+#include "remote_node_context.h"
+#include "scic_sds_request.h"
+#include "sci_environment.h"
+#include "sci_util.h"
+#include "scu_event_codes.h"
#include "task.h"
+enum sci_status scic_remote_device_stop(
+ struct scic_sds_remote_device *sci_dev,
+ u32 timeout)
+{
+ return sci_dev->state_handlers->stop_handler(sci_dev);
+}
+enum sci_status scic_remote_device_reset(
+ struct scic_sds_remote_device *sci_dev)
+{
+ return sci_dev->state_handlers->reset_handler(sci_dev);
+}
+
+
+enum sci_status scic_remote_device_reset_complete(
+ struct scic_sds_remote_device *sci_dev)
+{
+ return sci_dev->state_handlers->reset_complete_handler(sci_dev);
+}
+
+
+enum sas_linkrate scic_remote_device_get_connection_rate(
+ struct scic_sds_remote_device *sci_dev)
+{
+ return sci_dev->connection_rate;
+}
+
+
+void scic_remote_device_get_protocols(
+ struct scic_sds_remote_device *sci_dev,
+ struct smp_discover_response_protocols *pr)
+{
+ pr->u.all = sci_dev->target_protocols.u.all;
+}
+
+#if !defined(DISABLE_ATAPI)
+bool scic_remote_device_is_atapi(struct scic_sds_remote_device *sci_dev)
+{
+ return sci_dev->is_atapi;
+}
+#endif
+
+
+/**
+ *
+ *
+ * Remote device timer requirements
+ */
+#define SCIC_SDS_REMOTE_DEVICE_MINIMUM_TIMER_COUNT (0)
+#define SCIC_SDS_REMOTE_DEVICE_MAXIMUM_TIMER_COUNT (SCI_MAX_REMOTE_DEVICES)
+
+
+/**
+ *
+ * @sci_dev: The remote device for which the suspend is being requested.
+ *
+ * This method invokes the remote device suspend state handler. enum sci_status
+ */
+enum sci_status scic_sds_remote_device_suspend(
+ struct scic_sds_remote_device *sci_dev,
+ u32 suspend_type)
+{
+ return sci_dev->state_handlers->suspend_handler(sci_dev, suspend_type);
+}
+
+/**
+ *
+ * @sci_dev: The remote device for which the event handling is being
+ * requested.
+ * @frame_index: This is the frame index that is being processed.
+ *
+ * This method invokes the frame handler for the remote device state machine
+ * enum sci_status
+ */
+enum sci_status scic_sds_remote_device_frame_handler(
+ struct scic_sds_remote_device *sci_dev,
+ u32 frame_index)
+{
+ return sci_dev->state_handlers->frame_handler(sci_dev, frame_index);
+}
+
+/**
+ *
+ * @sci_dev: The remote device for which the event handling is being
+ * requested.
+ * @event_code: This is the event code that is to be processed.
+ *
+ * This method invokes the remote device event handler. enum sci_status
+ */
+enum sci_status scic_sds_remote_device_event_handler(
+ struct scic_sds_remote_device *sci_dev,
+ u32 event_code)
+{
+ return sci_dev->state_handlers->event_handler(sci_dev, event_code);
+}
+
+/**
+ *
+ * @controller: The controller that is starting the io request.
+ * @sci_dev: The remote device for which the start io handling is being
+ * requested.
+ * @io_request: The io request that is being started.
+ *
+ * This method invokes the remote device start io handler. enum sci_status
+ */
+enum sci_status scic_sds_remote_device_start_io(
+ struct scic_sds_controller *controller,
+ struct scic_sds_remote_device *sci_dev,
+ struct scic_sds_request *io_request)
+{
+ return sci_dev->state_handlers->start_io_handler(
+ sci_dev, io_request);
+}
+
+/**
+ *
+ * @controller: The controller that is completing the io request.
+ * @sci_dev: The remote device for which the complete io handling is being
+ * requested.
+ * @io_request: The io request that is being completed.
+ *
+ * This method invokes the remote device complete io handler. enum sci_status
+ */
+enum sci_status scic_sds_remote_device_complete_io(
+ struct scic_sds_controller *controller,
+ struct scic_sds_remote_device *sci_dev,
+ struct scic_sds_request *io_request)
+{
+ return sci_dev->state_handlers->complete_io_handler(
+ sci_dev, io_request);
+}
+
+/**
+ *
+ * @controller: The controller that is starting the task request.
+ * @sci_dev: The remote device for which the start task handling is being
+ * requested.
+ * @io_request: The task request that is being started.
+ *
+ * This method invokes the remote device start task handler. enum sci_status
+ */
+enum sci_status scic_sds_remote_device_start_task(
+ struct scic_sds_controller *controller,
+ struct scic_sds_remote_device *sci_dev,
+ struct scic_sds_request *io_request)
+{
+ return sci_dev->state_handlers->start_task_handler(
+ sci_dev, io_request);
+}
+
+/**
+ *
+ * @controller: The controller that is completing the task request.
+ * @sci_dev: The remote device for which the complete task handling is
+ * being requested.
+ * @io_request: The task request that is being completed.
+ *
+ * This method invokes the remote device complete task handler. enum sci_status
+ */
+
+/**
+ *
+ * @sci_dev:
+ * @request:
+ *
+ * This method takes the request and bulids an appropriate SCU context for the
+ * request and then requests the controller to post the request. none
+ */
+void scic_sds_remote_device_post_request(
+ struct scic_sds_remote_device *sci_dev,
+ u32 request)
+{
+ u32 context;
+
+ context = scic_sds_remote_device_build_command_context(sci_dev, request);
+
+ scic_sds_controller_post_request(
+ scic_sds_remote_device_get_controller(sci_dev),
+ context
+ );
+}
+
+#if !defined(DISABLE_ATAPI)
+/**
+ *
+ * @sci_dev: The device to be checked.
+ *
+ * This method check the signature fis of a stp device to decide whether a
+ * device is atapi or not. true if a device is atapi device. False if a device
+ * is not atapi.
+ */
+bool scic_sds_remote_device_is_atapi(
+ struct scic_sds_remote_device *sci_dev)
+{
+ if (!sci_dev->target_protocols.u.bits.attached_stp_target)
+ return false;
+ else if (sci_dev->is_direct_attached) {
+ struct scic_sds_phy *phy;
+ struct scic_sata_phy_properties properties;
+ struct sata_fis_reg_d2h *signature_fis;
+ phy = scic_sds_port_get_a_connected_phy(sci_dev->owning_port);
+ scic_sata_phy_get_properties(phy, &properties);
+
+ /* decode the signature fis. */
+ signature_fis = &(properties.signature_fis);
+
+ if ((signature_fis->sector_count == 0x01)
+ && (signature_fis->lba_low == 0x01)
+ && (signature_fis->lba_mid == 0x14)
+ && (signature_fis->lba_high == 0xEB)
+ && ((signature_fis->device & 0x5F) == 0x00)
+ ) {
+ /* An ATA device supporting the PACKET command set. */
+ return true;
+ } else
+ return false;
+ } else {
+ /* Expander supported ATAPI device is not currently supported. */
+ return false;
+ }
+}
+#endif
+
+/**
+ *
+ * @user_parameter: This is cast to a remote device object.
+ *
+ * This method is called once the remote node context is ready to be freed.
+ * The remote device can now report that its stop operation is complete. none
+ */
+static void scic_sds_cb_remote_device_rnc_destruct_complete(
+ void *user_parameter)
+{
+ struct scic_sds_remote_device *sci_dev;
+
+ sci_dev = (struct scic_sds_remote_device *)user_parameter;
+
+ BUG_ON(sci_dev->started_request_count != 0);
+
+ sci_base_state_machine_change_state(&sci_dev->state_machine,
+ SCI_BASE_REMOTE_DEVICE_STATE_STOPPED);
+}
+
+/**
+ *
+ * @user_parameter: This is cast to a remote device object.
+ *
+ * This method is called once the remote node context has transisitioned to a
+ * ready state. This is the indication that the remote device object can also
+ * transition to ready. none
+ */
+static void scic_sds_remote_device_resume_complete_handler(
+ void *user_parameter)
+{
+ struct scic_sds_remote_device *sci_dev;
+
+ sci_dev = (struct scic_sds_remote_device *)user_parameter;
+
+ if (
+ sci_base_state_machine_get_state(&sci_dev->state_machine)
+ != SCI_BASE_REMOTE_DEVICE_STATE_READY
+ ) {
+ sci_base_state_machine_change_state(
+ &sci_dev->state_machine,
+ SCI_BASE_REMOTE_DEVICE_STATE_READY
+ );
+ }
+}
+
+/**
+ *
+ * @device: This parameter specifies the device for which the request is being
+ * started.
+ * @request: This parameter specifies the request being started.
+ * @status: This parameter specifies the current start operation status.
+ *
+ * This method will perform the STP request start processing common to IO
+ * requests and task requests of all types. none
+ */
+void scic_sds_remote_device_start_request(
+ struct scic_sds_remote_device *sci_dev,
+ struct scic_sds_request *sci_req,
+ enum sci_status status)
+{
+ /* We still have a fault in starting the io complete it on the port */
+ if (status == SCI_SUCCESS)
+ scic_sds_remote_device_increment_request_count(sci_dev);
+ else{
+ sci_dev->owning_port->state_handlers->complete_io_handler(
+ sci_dev->owning_port, sci_dev, sci_req
+ );
+ }
+}
+
+
+/**
+ *
+ * @request: This parameter specifies the request being continued.
+ *
+ * This method will continue to post tc for a STP request. This method usually
+ * serves as a callback when RNC gets resumed during a task management
+ * sequence. none
+ */
+void scic_sds_remote_device_continue_request(void *dev)
+{
+ struct scic_sds_remote_device *sci_dev = dev;
+
+ /* we need to check if this request is still valid to continue. */
+ if (sci_dev->working_request)
+ scic_controller_continue_io(sci_dev->working_request);
+}
+
+/**
+ * This method will terminate all of the IO requests in the controllers IO
+ * request table that were targeted for this device.
+ * @sci_dev: This parameter specifies the remote device for which to
+ * attempt to terminate all requests.
+ *
+ * This method returns an indication as to whether all requests were
+ * successfully terminated. If a single request fails to be terminated, then
+ * this method will return the failure.
+ */
+static enum sci_status scic_sds_remote_device_terminate_requests(
+ struct scic_sds_remote_device *sci_dev)
+{
+ enum sci_status status = SCI_SUCCESS;
+ enum sci_status terminate_status = SCI_SUCCESS;
+ struct scic_sds_request *sci_req;
+ u32 index;
+ u32 request_count = sci_dev->started_request_count;
+
+ for (index = 0;
+ (index < SCI_MAX_IO_REQUESTS) && (request_count > 0);
+ index++) {
+ sci_req = sci_dev->owning_port->owning_controller->io_request_table[index];
+
+ if ((sci_req != NULL) && (sci_req->target_device == sci_dev)) {
+ terminate_status = scic_controller_terminate_request(
+ sci_dev->owning_port->owning_controller,
+ sci_dev,
+ sci_req
+ );
+
+ if (terminate_status != SCI_SUCCESS)
+ status = terminate_status;
+
+ request_count--;
+ }
+ }
+
+ return status;
+}
+
+static enum sci_status
+default_device_handler(struct scic_sds_remote_device *sci_dev,
+ const char *func)
+{
+ dev_warn(scirdev_to_dev(sci_dev),
+ "%s: in wrong state: %d\n", func,
+ sci_base_state_machine_get_state(&sci_dev->state_machine));
+ return SCI_FAILURE_INVALID_STATE;
+}
+
+enum sci_status scic_sds_remote_device_default_start_handler(
+ struct scic_sds_remote_device *sci_dev)
+{
+ return default_device_handler(sci_dev, __func__);
+}
+
+static enum sci_status scic_sds_remote_device_default_stop_handler(
+ struct scic_sds_remote_device *sci_dev)
+{
+ return default_device_handler(sci_dev, __func__);
+}
+
+enum sci_status scic_sds_remote_device_default_fail_handler(
+ struct scic_sds_remote_device *sci_dev)
+{
+ return default_device_handler(sci_dev, __func__);
+}
+
+enum sci_status scic_sds_remote_device_default_destruct_handler(
+ struct scic_sds_remote_device *sci_dev)
+{
+ return default_device_handler(sci_dev, __func__);
+}
+
+enum sci_status scic_sds_remote_device_default_reset_handler(
+ struct scic_sds_remote_device *sci_dev)
+{
+ return default_device_handler(sci_dev, __func__);
+}
+
+enum sci_status scic_sds_remote_device_default_reset_complete_handler(
+ struct scic_sds_remote_device *sci_dev)
+{
+ return default_device_handler(sci_dev, __func__);
+}
+
+enum sci_status scic_sds_remote_device_default_suspend_handler(
+ struct scic_sds_remote_device *sci_dev, u32 suspend_type)
+{
+ return default_device_handler(sci_dev, __func__);
+}
+
+enum sci_status scic_sds_remote_device_default_resume_handler(
+ struct scic_sds_remote_device *sci_dev)
+{
+ return default_device_handler(sci_dev, __func__);
+}
+
+/**
+ *
+ * @device: The struct scic_sds_remote_device which is then cast into a
+ * struct scic_sds_remote_device.
+ * @event_code: The event code that the struct scic_sds_controller wants the device
+ * object to process.
+ *
+ * This method is the default event handler. It will call the RNC state
+ * machine handler for any RNC events otherwise it will log a warning and
+ * returns a failure. enum sci_status SCI_FAILURE_INVALID_STATE
+ */
+static enum sci_status scic_sds_remote_device_core_event_handler(
+ struct scic_sds_remote_device *sci_dev,
+ u32 event_code,
+ bool is_ready_state)
+{
+ enum sci_status status;
+
+ switch (scu_get_event_type(event_code)) {
+ case SCU_EVENT_TYPE_RNC_OPS_MISC:
+ case SCU_EVENT_TYPE_RNC_SUSPEND_TX:
+ case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX:
+ status = scic_sds_remote_node_context_event_handler(&sci_dev->rnc, event_code);
+ break;
+ case SCU_EVENT_TYPE_PTX_SCHEDULE_EVENT:
+
+ if (scu_get_event_code(event_code) == SCU_EVENT_IT_NEXUS_TIMEOUT) {
+ status = SCI_SUCCESS;
+
+ /* Suspend the associated RNC */
+ scic_sds_remote_node_context_suspend(&sci_dev->rnc,
+ SCI_SOFTWARE_SUSPENSION,
+ NULL, NULL);
+
+ dev_dbg(scirdev_to_dev(sci_dev),
+ "%s: device: %p event code: %x: %s\n",
+ __func__, sci_dev, event_code,
+ (is_ready_state)
+ ? "I_T_Nexus_Timeout event"
+ : "I_T_Nexus_Timeout event in wrong state");
+
+ break;
+ }
+ /* Else, fall through and treat as unhandled... */
+
+ default:
+ dev_dbg(scirdev_to_dev(sci_dev),
+ "%s: device: %p event code: %x: %s\n",
+ __func__, sci_dev, event_code,
+ (is_ready_state)
+ ? "unexpected event"
+ : "unexpected event in wrong state");
+ status = SCI_FAILURE_INVALID_STATE;
+ break;
+ }
+
+ return status;
+}
+/**
+ *
+ * @device: The struct scic_sds_remote_device which is then cast into a
+ * struct scic_sds_remote_device.
+ * @event_code: The event code that the struct scic_sds_controller wants the device
+ * object to process.
+ *
+ * This method is the default event handler. It will call the RNC state
+ * machine handler for any RNC events otherwise it will log a warning and
+ * returns a failure. enum sci_status SCI_FAILURE_INVALID_STATE
+ */
+static enum sci_status scic_sds_remote_device_default_event_handler(
+ struct scic_sds_remote_device *sci_dev,
+ u32 event_code)
+{
+ return scic_sds_remote_device_core_event_handler(sci_dev,
+ event_code,
+ false);
+}
+
+/**
+ *
+ * @device: The struct scic_sds_remote_device which is then cast into a
+ * struct scic_sds_remote_device.
+ * @frame_index: The frame index for which the struct scic_sds_controller wants this
+ * device object to process.
+ *
+ * This method is the default unsolicited frame handler. It logs a warning,
+ * releases the frame and returns a failure. enum sci_status
+ * SCI_FAILURE_INVALID_STATE
+ */
+enum sci_status scic_sds_remote_device_default_frame_handler(
+ struct scic_sds_remote_device *sci_dev,
+ u32 frame_index)
+{
+ dev_warn(scirdev_to_dev(sci_dev),
+ "%s: SCIC Remote Device requested to handle frame %x "
+ "while in wrong state %d\n",
+ __func__,
+ frame_index,
+ sci_base_state_machine_get_state(
+ &sci_dev->state_machine));
+
+ /* Return the frame back to the controller */
+ scic_sds_controller_release_frame(
+ scic_sds_remote_device_get_controller(sci_dev), frame_index
+ );
+
+ return SCI_FAILURE_INVALID_STATE;
+}
+
+enum sci_status scic_sds_remote_device_default_start_request_handler(
+ struct scic_sds_remote_device *sci_dev,
+ struct scic_sds_request *request)
+{
+ return default_device_handler(sci_dev, __func__);
+}
+
+enum sci_status scic_sds_remote_device_default_complete_request_handler(
+ struct scic_sds_remote_device *sci_dev,
+ struct scic_sds_request *request)
+{
+ return default_device_handler(sci_dev, __func__);
+}
+
+enum sci_status scic_sds_remote_device_default_continue_request_handler(
+ struct scic_sds_remote_device *sci_dev,
+ struct scic_sds_request *request)
+{
+ return default_device_handler(sci_dev, __func__);
+}
+
+/**
+ *
+ * @device: The struct scic_sds_remote_device which is then cast into a
+ * struct scic_sds_remote_device.
+ * @frame_index: The frame index for which the struct scic_sds_controller wants this
+ * device object to process.
+ *
+ * This method is a general ssp frame handler. In most cases the device object
+ * needs to route the unsolicited frame processing to the io request object.
+ * This method decodes the tag for the io request object and routes the
+ * unsolicited frame to that object. enum sci_status SCI_FAILURE_INVALID_STATE
+ */
+enum sci_status scic_sds_remote_device_general_frame_handler(
+ struct scic_sds_remote_device *sci_dev,
+ u32 frame_index)
+{
+ enum sci_status result;
+ struct sci_ssp_frame_header *frame_header;
+ struct scic_sds_request *io_request;
+
+ result = scic_sds_unsolicited_frame_control_get_header(
+ &(scic_sds_remote_device_get_controller(sci_dev)->uf_control),
+ frame_index,
+ (void **)&frame_header
+ );
+
+ if (SCI_SUCCESS == result) {
+ io_request = scic_sds_controller_get_io_request_from_tag(
+ scic_sds_remote_device_get_controller(sci_dev), frame_header->tag);
+
+ if ((io_request == NULL)
+ || (io_request->target_device != sci_dev)) {
+ /*
+ * We could not map this tag to a valid IO request
+ * Just toss the frame and continue */
+ scic_sds_controller_release_frame(
+ scic_sds_remote_device_get_controller(sci_dev), frame_index
+ );
+ } else {
+ /* The IO request is now in charge of releasing the frame */
+ result = io_request->state_handlers->frame_handler(
+ io_request, frame_index);
+ }
+ }
+
+ return result;
+}
+
+/**
+ *
+ * @[in]: sci_dev This is the device object that is receiving the event.
+ * @[in]: event_code The event code to process.
+ *
+ * This is a common method for handling events reported to the remote device
+ * from the controller object. enum sci_status
+ */
+enum sci_status scic_sds_remote_device_general_event_handler(
+ struct scic_sds_remote_device *sci_dev,
+ u32 event_code)
+{
+ return scic_sds_remote_device_core_event_handler(sci_dev,
+ event_code,
+ true);
+}
+
+/*
+ * *****************************************************************************
+ * * STOPPED STATE HANDLERS
+ * ***************************************************************************** */
+
+/**
+ *
+ * @device:
+ *
+ * This method takes the struct scic_sds_remote_device from a stopped state and
+ * attempts to start it. The RNC buffer for the device is constructed and the
+ * device state machine is transitioned to the
+ * SCIC_BASE_REMOTE_DEVICE_STATE_STARTING. enum sci_status SCI_SUCCESS if there is
+ * an RNC buffer available to construct the remote device.
+ * SCI_FAILURE_INSUFFICIENT_RESOURCES if there is no RNC buffer available in
+ * which to construct the remote device.
+ */
+static enum sci_status scic_sds_remote_device_stopped_state_start_handler(
+ struct scic_sds_remote_device *sci_dev)
+{
+ enum sci_status status;
+
+ status = scic_sds_remote_node_context_resume(&sci_dev->rnc,
+ scic_sds_remote_device_resume_complete_handler, sci_dev);
+
+ if (status == SCI_SUCCESS)
+ sci_base_state_machine_change_state(&sci_dev->state_machine,
+ SCI_BASE_REMOTE_DEVICE_STATE_STARTING);
+
+ return status;
+}
+
+static enum sci_status scic_sds_remote_device_stopped_state_stop_handler(
+ struct scic_sds_remote_device *sci_dev)
+{
+ return SCI_SUCCESS;
+}
+
+/**
+ *
+ * @sci_dev: The struct scic_sds_remote_device which is cast into a
+ * struct scic_sds_remote_device.
+ *
+ * This method will destruct a struct scic_sds_remote_device that is in a stopped
+ * state. This is the only state from which a destruct request will succeed.
+ * The RNi for this struct scic_sds_remote_device is returned to the free pool and the
+ * device object transitions to the SCI_BASE_REMOTE_DEVICE_STATE_FINAL.
+ * enum sci_status SCI_SUCCESS
+ */
+static enum sci_status scic_sds_remote_device_stopped_state_destruct_handler(
+ struct scic_sds_remote_device *sci_dev)
+{
+ struct scic_sds_controller *scic;
+
+ scic = scic_sds_remote_device_get_controller(sci_dev);
+ scic_sds_controller_free_remote_node_context(scic, sci_dev,
+ sci_dev->rnc.remote_node_index);
+ sci_dev->rnc.remote_node_index = SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX;
+
+ sci_base_state_machine_change_state(&sci_dev->state_machine,
+ SCI_BASE_REMOTE_DEVICE_STATE_FINAL);
+
+ return SCI_SUCCESS;
+}
+
+/*
+ * *****************************************************************************
+ * * STARTING STATE HANDLERS
+ * ***************************************************************************** */
+
+static enum sci_status scic_sds_remote_device_starting_state_stop_handler(
+ struct scic_sds_remote_device *sci_dev)
+{
+ /*
+ * This device has not yet started so there had better be no IO requests
+ */
+ BUG_ON(sci_dev->started_request_count != 0);
+
+ /*
+ * Destroy the remote node context
+ */
+ scic_sds_remote_node_context_destruct(&sci_dev->rnc,
+ scic_sds_cb_remote_device_rnc_destruct_complete, sci_dev);
+
+ /*
+ * Transition to the stopping state and wait for the remote node to
+ * complete being posted and invalidated.
+ */
+ sci_base_state_machine_change_state(&sci_dev->state_machine,
+ SCI_BASE_REMOTE_DEVICE_STATE_STOPPING);
+
+ return SCI_SUCCESS;
+}
+
+enum sci_status scic_sds_remote_device_ready_state_stop_handler(
+ struct scic_sds_remote_device *sci_dev)
+{
+ enum sci_status status = SCI_SUCCESS;
+
+ /* Request the parent state machine to transition to the stopping state */
+ sci_base_state_machine_change_state(&sci_dev->state_machine,
+ SCI_BASE_REMOTE_DEVICE_STATE_STOPPING);
+
+ if (sci_dev->started_request_count == 0) {
+ scic_sds_remote_node_context_destruct(&sci_dev->rnc,
+ scic_sds_cb_remote_device_rnc_destruct_complete,
+ sci_dev);
+ } else
+ status = scic_sds_remote_device_terminate_requests(sci_dev);
+
+ return status;
+}
+
+/**
+ *
+ * @device: The struct scic_sds_remote_device object which is cast to a
+ * struct scic_sds_remote_device object.
+ *
+ * This is the ready state device reset handler enum sci_status
+ */
+enum sci_status scic_sds_remote_device_ready_state_reset_handler(
+ struct scic_sds_remote_device *sci_dev)
+{
+ /* Request the parent state machine to transition to the stopping state */
+ sci_base_state_machine_change_state(&sci_dev->state_machine,
+ SCI_BASE_REMOTE_DEVICE_STATE_RESETTING);
+
+ return SCI_SUCCESS;
+}
+
+/*
+ * This method will attempt to start a task request for this device object. The
+ * remote device object will issue the start request for the task and if
+ * successful it will start the request for the port object then increment its
+ * own requet count. enum sci_status SCI_SUCCESS if the task request is started for
+ * this device object. SCI_FAILURE_INSUFFICIENT_RESOURCES if the io request
+ * object could not get the resources to start.
+ */
+static enum sci_status scic_sds_remote_device_ready_state_start_task_handler(
+ struct scic_sds_remote_device *sci_dev,
+ struct scic_sds_request *request)
+{
+ enum sci_status result;
+
+ /* See if the port is in a state where we can start the IO request */
+ result = scic_sds_port_start_io(
+ scic_sds_remote_device_get_port(sci_dev), sci_dev, request);
+
+ if (result == SCI_SUCCESS) {
+ result = scic_sds_remote_node_context_start_task(&sci_dev->rnc,
+ request);
+ if (result == SCI_SUCCESS)
+ result = scic_sds_request_start(request);
+
+ scic_sds_remote_device_start_request(sci_dev, request, result);
+ }
+
+ return result;
+}
+
+/*
+ * This method will attempt to start an io request for this device object. The
+ * remote device object will issue the start request for the io and if
+ * successful it will start the request for the port object then increment its
+ * own requet count. enum sci_status SCI_SUCCESS if the io request is started for
+ * this device object. SCI_FAILURE_INSUFFICIENT_RESOURCES if the io request
+ * object could not get the resources to start.
+ */
+static enum sci_status scic_sds_remote_device_ready_state_start_io_handler(
+ struct scic_sds_remote_device *sci_dev,
+ struct scic_sds_request *request)
+{
+ enum sci_status result;
+
+ /* See if the port is in a state where we can start the IO request */
+ result = scic_sds_port_start_io(
+ scic_sds_remote_device_get_port(sci_dev), sci_dev, request);
+
+ if (result == SCI_SUCCESS) {
+ result = scic_sds_remote_node_context_start_io(&sci_dev->rnc, request);
+ if (result == SCI_SUCCESS)
+ result = scic_sds_request_start(request);
+
+ scic_sds_remote_device_start_request(sci_dev, request, result);
+ }
+
+ return result;
+}
+
+/*
+ * This method will complete the request for the remote device object. The
+ * method will call the completion handler for the request object and if
+ * successful it will complete the request on the port object then decrement
+ * its own started_request_count. enum sci_status
+ */
+static enum sci_status scic_sds_remote_device_ready_state_complete_request_handler(
+ struct scic_sds_remote_device *sci_dev,
+ struct scic_sds_request *request)
+{
+ enum sci_status result;
+
+ result = scic_sds_request_complete(request);
+
+ if (result != SCI_SUCCESS)
+ return result;
+
+ /* See if the port is in a state
+ * where we can start the IO request */
+ result = scic_sds_port_complete_io(
+ scic_sds_remote_device_get_port(sci_dev),
+ sci_dev, request);
+
+ if (result == SCI_SUCCESS)
+ scic_sds_remote_device_decrement_request_count(sci_dev);
+
+ return result;
+}
+
+/*
+ * *****************************************************************************
+ * * STOPPING STATE HANDLERS
+ * ***************************************************************************** */
+
+/**
+ *
+ * @sci_dev: The struct scic_sds_remote_device which is cast into a
+ * struct scic_sds_remote_device.
+ *
+ * This method will stop a struct scic_sds_remote_device that is already in the
+ * SCI_BASE_REMOTE_DEVICE_STATE_STOPPING state. This is not considered an error
+ * since we allow a stop request on a device that is alreay stopping or
+ * stopped. enum sci_status SCI_SUCCESS
+ */
+static enum sci_status scic_sds_remote_device_stopping_state_stop_handler(
+ struct scic_sds_remote_device *device)
+{
+ /*
+ * All requests should have been terminated, but if there is an
+ * attempt to stop a device already in the stopping state, then
+ * try again to terminate. */
+ return scic_sds_remote_device_terminate_requests(device);
+}
+
+
+/**
+ *
+ * @device: The device object for which the request is completing.
+ * @request: The task request that is being completed.
+ *
+ * This method completes requests for this struct scic_sds_remote_device while it is
+ * in the SCI_BASE_REMOTE_DEVICE_STATE_STOPPING state. This method calls the
+ * complete method for the request object and if that is successful the port
+ * object is called to complete the task request. Then the device object itself
+ * completes the task request. If struct scic_sds_remote_device started_request_count
+ * goes to 0 and the invalidate RNC request has completed the device object can
+ * transition to the SCI_BASE_REMOTE_DEVICE_STATE_STOPPED. enum sci_status
+ */
+static enum sci_status scic_sds_remote_device_stopping_state_complete_request_handler(
+ struct scic_sds_remote_device *sci_dev,
+ struct scic_sds_request *request)
+{
+ enum sci_status status = SCI_SUCCESS;
+
+ status = scic_sds_request_complete(request);
+
+ if (status != SCI_SUCCESS)
+ return status;
+
+ status = scic_sds_port_complete_io(scic_sds_remote_device_get_port(sci_dev),
+ sci_dev, request);
+ if (status != SCI_SUCCESS)
+ return status;
+
+ scic_sds_remote_device_decrement_request_count(sci_dev);
+
+ if (scic_sds_remote_device_get_request_count(sci_dev) == 0)
+ scic_sds_remote_node_context_destruct(&sci_dev->rnc,
+ scic_sds_cb_remote_device_rnc_destruct_complete,
+ sci_dev);
+ return SCI_SUCCESS;
+}
+
+/**
+ *
+ * @device: The struct scic_sds_remote_device which is to be cast into a
+ * struct scic_sds_remote_device object.
+ *
+ * This method will complete the reset operation when the device is in the
+ * resetting state. enum sci_status
+ */
+static enum sci_status scic_sds_remote_device_resetting_state_reset_complete_handler(
+ struct scic_sds_remote_device *sci_dev)
+{
+
+ sci_base_state_machine_change_state(
+ &sci_dev->state_machine,
+ SCI_BASE_REMOTE_DEVICE_STATE_READY
+ );
+
+ return SCI_SUCCESS;
+}
+
+/**
+ *
+ * @device: The struct scic_sds_remote_device which is to be cast into a
+ * struct scic_sds_remote_device object.
+ *
+ * This method will stop the remote device while in the resetting state.
+ * enum sci_status
+ */
+static enum sci_status scic_sds_remote_device_resetting_state_stop_handler(
+ struct scic_sds_remote_device *sci_dev)
+{
+ sci_base_state_machine_change_state(
+ &sci_dev->state_machine,
+ SCI_BASE_REMOTE_DEVICE_STATE_STOPPING
+ );
+
+ return SCI_SUCCESS;
+}
+
+/*
+ * This method completes requests for this struct scic_sds_remote_device while it is
+ * in the SCI_BASE_REMOTE_DEVICE_STATE_RESETTING state. This method calls the
+ * complete method for the request object and if that is successful the port
+ * object is called to complete the task request. Then the device object itself
+ * completes the task request. enum sci_status
+ */
+static enum sci_status scic_sds_remote_device_resetting_state_complete_request_handler(
+ struct scic_sds_remote_device *sci_dev,
+ struct scic_sds_request *request)
+{
+ enum sci_status status = SCI_SUCCESS;
+
+ status = scic_sds_request_complete(request);
+
+ if (status == SCI_SUCCESS) {
+ status = scic_sds_port_complete_io(
+ scic_sds_remote_device_get_port(sci_dev),
+ sci_dev, request);
+
+ if (status == SCI_SUCCESS) {
+ scic_sds_remote_device_decrement_request_count(sci_dev);
+ }
+ }
+
+ return status;
+}
+
+static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_state_handler_table[] = {
+ [SCI_BASE_REMOTE_DEVICE_STATE_INITIAL] = {
+ .start_handler = scic_sds_remote_device_default_start_handler,
+ .stop_handler = scic_sds_remote_device_default_stop_handler,
+ .fail_handler = scic_sds_remote_device_default_fail_handler,
+ .destruct_handler = scic_sds_remote_device_default_destruct_handler,
+ .reset_handler = scic_sds_remote_device_default_reset_handler,
+ .reset_complete_handler = scic_sds_remote_device_default_reset_complete_handler,
+ .start_io_handler = scic_sds_remote_device_default_start_request_handler,
+ .complete_io_handler = scic_sds_remote_device_default_complete_request_handler,
+ .continue_io_handler = scic_sds_remote_device_default_continue_request_handler,
+ .start_task_handler = scic_sds_remote_device_default_start_request_handler,
+ .complete_task_handler = scic_sds_remote_device_default_complete_request_handler,
+ .suspend_handler = scic_sds_remote_device_default_suspend_handler,
+ .resume_handler = scic_sds_remote_device_default_resume_handler,
+ .event_handler = scic_sds_remote_device_default_event_handler,
+ .frame_handler = scic_sds_remote_device_default_frame_handler
+ },
+ [SCI_BASE_REMOTE_DEVICE_STATE_STOPPED] = {
+ .start_handler = scic_sds_remote_device_stopped_state_start_handler,
+ .stop_handler = scic_sds_remote_device_stopped_state_stop_handler,
+ .fail_handler = scic_sds_remote_device_default_fail_handler,
+ .destruct_handler = scic_sds_remote_device_stopped_state_destruct_handler,
+ .reset_handler = scic_sds_remote_device_default_reset_handler,
+ .reset_complete_handler = scic_sds_remote_device_default_reset_complete_handler,
+ .start_io_handler = scic_sds_remote_device_default_start_request_handler,
+ .complete_io_handler = scic_sds_remote_device_default_complete_request_handler,
+ .continue_io_handler = scic_sds_remote_device_default_continue_request_handler,
+ .start_task_handler = scic_sds_remote_device_default_start_request_handler,
+ .complete_task_handler = scic_sds_remote_device_default_complete_request_handler,
+ .suspend_handler = scic_sds_remote_device_default_suspend_handler,
+ .resume_handler = scic_sds_remote_device_default_resume_handler,
+ .event_handler = scic_sds_remote_device_default_event_handler,
+ .frame_handler = scic_sds_remote_device_default_frame_handler
+ },
+ [SCI_BASE_REMOTE_DEVICE_STATE_STARTING] = {
+ .start_handler = scic_sds_remote_device_default_start_handler,
+ .stop_handler = scic_sds_remote_device_starting_state_stop_handler,
+ .fail_handler = scic_sds_remote_device_default_fail_handler,
+ .destruct_handler = scic_sds_remote_device_default_destruct_handler,
+ .reset_handler = scic_sds_remote_device_default_reset_handler,
+ .reset_complete_handler = scic_sds_remote_device_default_reset_complete_handler,
+ .start_io_handler = scic_sds_remote_device_default_start_request_handler,
+ .complete_io_handler = scic_sds_remote_device_default_complete_request_handler,
+ .continue_io_handler = scic_sds_remote_device_default_continue_request_handler,
+ .start_task_handler = scic_sds_remote_device_default_start_request_handler,
+ .complete_task_handler = scic_sds_remote_device_default_complete_request_handler,
+ .suspend_handler = scic_sds_remote_device_default_suspend_handler,
+ .resume_handler = scic_sds_remote_device_default_resume_handler,
+ .event_handler = scic_sds_remote_device_general_event_handler,
+ .frame_handler = scic_sds_remote_device_default_frame_handler
+ },
+ [SCI_BASE_REMOTE_DEVICE_STATE_READY] = {
+ .start_handler = scic_sds_remote_device_default_start_handler,
+ .stop_handler = scic_sds_remote_device_ready_state_stop_handler,
+ .fail_handler = scic_sds_remote_device_default_fail_handler,
+ .destruct_handler = scic_sds_remote_device_default_destruct_handler,
+ .reset_handler = scic_sds_remote_device_ready_state_reset_handler,
+ .reset_complete_handler = scic_sds_remote_device_default_reset_complete_handler,
+ .start_io_handler = scic_sds_remote_device_ready_state_start_io_handler,
+ .complete_io_handler = scic_sds_remote_device_ready_state_complete_request_handler,
+ .continue_io_handler = scic_sds_remote_device_default_continue_request_handler,
+ .start_task_handler = scic_sds_remote_device_ready_state_start_task_handler,
+ .complete_task_handler = scic_sds_remote_device_ready_state_complete_request_handler,
+ .suspend_handler = scic_sds_remote_device_default_suspend_handler,
+ .resume_handler = scic_sds_remote_device_default_resume_handler,
+ .event_handler = scic_sds_remote_device_general_event_handler,
+ .frame_handler = scic_sds_remote_device_general_frame_handler,
+ },
+ [SCI_BASE_REMOTE_DEVICE_STATE_STOPPING] = {
+ .start_handler = scic_sds_remote_device_default_start_handler,
+ .stop_handler = scic_sds_remote_device_stopping_state_stop_handler,
+ .fail_handler = scic_sds_remote_device_default_fail_handler,
+ .destruct_handler = scic_sds_remote_device_default_destruct_handler,
+ .reset_handler = scic_sds_remote_device_default_reset_handler,
+ .reset_complete_handler = scic_sds_remote_device_default_reset_complete_handler,
+ .start_io_handler = scic_sds_remote_device_default_start_request_handler,
+ .complete_io_handler = scic_sds_remote_device_stopping_state_complete_request_handler,
+ .continue_io_handler = scic_sds_remote_device_default_continue_request_handler,
+ .start_task_handler = scic_sds_remote_device_default_start_request_handler,
+ .complete_task_handler = scic_sds_remote_device_stopping_state_complete_request_handler,
+ .suspend_handler = scic_sds_remote_device_default_suspend_handler,
+ .resume_handler = scic_sds_remote_device_default_resume_handler,
+ .event_handler = scic_sds_remote_device_general_event_handler,
+ .frame_handler = scic_sds_remote_device_general_frame_handler
+ },
+ [SCI_BASE_REMOTE_DEVICE_STATE_FAILED] = {
+ .start_handler = scic_sds_remote_device_default_start_handler,
+ .stop_handler = scic_sds_remote_device_default_stop_handler,
+ .fail_handler = scic_sds_remote_device_default_fail_handler,
+ .destruct_handler = scic_sds_remote_device_default_destruct_handler,
+ .reset_handler = scic_sds_remote_device_default_reset_handler,
+ .reset_complete_handler = scic_sds_remote_device_default_reset_complete_handler,
+ .start_io_handler = scic_sds_remote_device_default_start_request_handler,
+ .complete_io_handler = scic_sds_remote_device_default_complete_request_handler,
+ .continue_io_handler = scic_sds_remote_device_default_continue_request_handler,
+ .start_task_handler = scic_sds_remote_device_default_start_request_handler,
+ .complete_task_handler = scic_sds_remote_device_default_complete_request_handler,
+ .suspend_handler = scic_sds_remote_device_default_suspend_handler,
+ .resume_handler = scic_sds_remote_device_default_resume_handler,
+ .event_handler = scic_sds_remote_device_default_event_handler,
+ .frame_handler = scic_sds_remote_device_general_frame_handler
+ },
+ [SCI_BASE_REMOTE_DEVICE_STATE_RESETTING] = {
+ .start_handler = scic_sds_remote_device_default_start_handler,
+ .stop_handler = scic_sds_remote_device_resetting_state_stop_handler,
+ .fail_handler = scic_sds_remote_device_default_fail_handler,
+ .destruct_handler = scic_sds_remote_device_default_destruct_handler,
+ .reset_handler = scic_sds_remote_device_default_reset_handler,
+ .reset_complete_handler = scic_sds_remote_device_resetting_state_reset_complete_handler,
+ .start_io_handler = scic_sds_remote_device_default_start_request_handler,
+ .complete_io_handler = scic_sds_remote_device_resetting_state_complete_request_handler,
+ .continue_io_handler = scic_sds_remote_device_default_continue_request_handler,
+ .start_task_handler = scic_sds_remote_device_default_start_request_handler,
+ .complete_task_handler = scic_sds_remote_device_resetting_state_complete_request_handler,
+ .suspend_handler = scic_sds_remote_device_default_suspend_handler,
+ .resume_handler = scic_sds_remote_device_default_resume_handler,
+ .event_handler = scic_sds_remote_device_default_event_handler,
+ .frame_handler = scic_sds_remote_device_general_frame_handler
+ },
+ [SCI_BASE_REMOTE_DEVICE_STATE_FINAL] = {
+ .start_handler = scic_sds_remote_device_default_start_handler,
+ .stop_handler = scic_sds_remote_device_default_stop_handler,
+ .fail_handler = scic_sds_remote_device_default_fail_handler,
+ .destruct_handler = scic_sds_remote_device_default_destruct_handler,
+ .reset_handler = scic_sds_remote_device_default_reset_handler,
+ .reset_complete_handler = scic_sds_remote_device_default_reset_complete_handler,
+ .start_io_handler = scic_sds_remote_device_default_start_request_handler,
+ .complete_io_handler = scic_sds_remote_device_default_complete_request_handler,
+ .continue_io_handler = scic_sds_remote_device_default_continue_request_handler,
+ .start_task_handler = scic_sds_remote_device_default_start_request_handler,
+ .complete_task_handler = scic_sds_remote_device_default_complete_request_handler,
+ .suspend_handler = scic_sds_remote_device_default_suspend_handler,
+ .resume_handler = scic_sds_remote_device_default_resume_handler,
+ .event_handler = scic_sds_remote_device_default_event_handler,
+ .frame_handler = scic_sds_remote_device_default_frame_handler
+ }
+};
+
+static void scic_sds_remote_device_initial_state_enter(
+ struct sci_base_object *object)
+{
+ struct scic_sds_remote_device *sci_dev = (struct scic_sds_remote_device *)object;
+
+ sci_dev = container_of(object, typeof(*sci_dev), parent);
+ SET_STATE_HANDLER(sci_dev, scic_sds_remote_device_state_handler_table,
+ SCI_BASE_REMOTE_DEVICE_STATE_INITIAL);
+
+ /* Initial state is a transitional state to the stopped state */
+ sci_base_state_machine_change_state(&sci_dev->state_machine,
+ SCI_BASE_REMOTE_DEVICE_STATE_STOPPED);
+}
+
+/**
+ * isci_remote_device_change_state() - This function gets the status of the
+ * remote_device object.
+ * @isci_device: This parameter points to the isci_remote_device object
+ *
+ * status of the object as a isci_status enum.
+ */
+void isci_remote_device_change_state(
+ struct isci_remote_device *isci_device,
+ enum isci_status status)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&isci_device->state_lock, flags);
+ isci_device->status = status;
+ spin_unlock_irqrestore(&isci_device->state_lock, flags);
+}
+
+/**
+ * scic_remote_device_destruct() - free remote node context and destruct
+ * @remote_device: This parameter specifies the remote device to be destructed.
+ *
+ * Remote device objects are a limited resource. As such, they must be
+ * protected. Thus calls to construct and destruct are mutually exclusive and
+ * non-reentrant. The return value shall indicate if the device was
+ * successfully destructed or if some failure occurred. enum sci_status This value
+ * is returned if the device is successfully destructed.
+ * SCI_FAILURE_INVALID_REMOTE_DEVICE This value is returned if the supplied
+ * device isn't valid (e.g. it's already been destoryed, the handle isn't
+ * valid, etc.).
+ */
+static enum sci_status scic_remote_device_destruct(struct scic_sds_remote_device *sci_dev)
+{
+ return sci_dev->state_handlers->destruct_handler(sci_dev);
+}
+
/**
* isci_remote_device_deconstruct() - This function frees an isci_remote_device.
* @ihost: This parameter specifies the isci host object.
@@ -98,6 +1249,418 @@
wake_up(&ihost->eventq);
}
+/**
+ * isci_remote_device_stop_complete() - This function is called by the scic
+ * when the remote device stop has completed. We mark the isci device as not
+ * ready and remove the isci remote device.
+ * @ihost: This parameter specifies the isci host object.
+ * @idev: This parameter specifies the remote device.
+ * @status: This parameter specifies status of the completion.
+ *
+ */
+static void isci_remote_device_stop_complete(struct isci_host *ihost,
+ struct isci_remote_device *idev)
+{
+ dev_dbg(&ihost->pdev->dev, "%s: complete idev = %p\n", __func__, idev);
+
+ isci_remote_device_change_state(idev, isci_stopped);
+
+ /* after stop, we can tear down resources. */
+ isci_remote_device_deconstruct(ihost, idev);
+}
+
+static void scic_sds_remote_device_stopped_state_enter(
+ struct sci_base_object *object)
+{
+ struct scic_sds_remote_device *sci_dev;
+ struct scic_sds_controller *scic;
+ struct isci_remote_device *idev;
+ struct isci_host *ihost;
+ u32 prev_state;
+
+ sci_dev = container_of(object, typeof(*sci_dev), parent);
+ scic = scic_sds_remote_device_get_controller(sci_dev);
+ ihost = sci_object_get_association(scic);
+ idev = sci_object_get_association(sci_dev);
+
+ SET_STATE_HANDLER(sci_dev, scic_sds_remote_device_state_handler_table,
+ SCI_BASE_REMOTE_DEVICE_STATE_STOPPED);
+
+ /* If we are entering from the stopping state let the SCI User know that
+ * the stop operation has completed.
+ */
+ prev_state = sci_dev->state_machine.previous_state_id;
+ if (prev_state == SCI_BASE_REMOTE_DEVICE_STATE_STOPPING)
+ isci_remote_device_stop_complete(ihost, idev);
+
+ scic_sds_controller_remote_device_stopped(scic, sci_dev);
+}
+
+static void scic_sds_remote_device_starting_state_enter(struct sci_base_object *object)
+{
+ struct scic_sds_remote_device *sci_dev = container_of(object, typeof(*sci_dev),
+ parent);
+ struct scic_sds_controller *scic = scic_sds_remote_device_get_controller(sci_dev);
+ struct isci_host *ihost = sci_object_get_association(scic);
+ struct isci_remote_device *idev = sci_object_get_association(sci_dev);
+
+ SET_STATE_HANDLER(sci_dev, scic_sds_remote_device_state_handler_table,
+ SCI_BASE_REMOTE_DEVICE_STATE_STARTING);
+
+ isci_remote_device_not_ready(ihost, idev,
+ SCIC_REMOTE_DEVICE_NOT_READY_START_REQUESTED);
+}
+
+static void scic_sds_remote_device_ready_state_enter(struct sci_base_object *object)
+{
+ struct scic_sds_remote_device *sci_dev = container_of(object, typeof(*sci_dev),
+ parent);
+ struct scic_sds_controller *scic = scic_sds_remote_device_get_controller(sci_dev);
+ struct isci_host *ihost = sci_object_get_association(scic);
+ struct isci_remote_device *idev = sci_object_get_association(sci_dev);
+
+ SET_STATE_HANDLER(sci_dev,
+ scic_sds_remote_device_state_handler_table,
+ SCI_BASE_REMOTE_DEVICE_STATE_READY);
+
+ scic->remote_device_sequence[sci_dev->rnc.remote_node_index]++;
+
+ if (sci_dev->has_ready_substate_machine)
+ sci_base_state_machine_start(&sci_dev->ready_substate_machine);
+ else
+ isci_remote_device_ready(ihost, idev);
+}
+
+static void scic_sds_remote_device_ready_state_exit(
+ struct sci_base_object *object)
+{
+ struct scic_sds_remote_device *sci_dev = container_of(object, typeof(*sci_dev),
+ parent);
+ if (sci_dev->has_ready_substate_machine)
+ sci_base_state_machine_stop(&sci_dev->ready_substate_machine);
+ else {
+ struct scic_sds_controller *scic = scic_sds_remote_device_get_controller(sci_dev);
+ struct isci_host *ihost = sci_object_get_association(scic);
+ struct isci_remote_device *idev = sci_object_get_association(sci_dev);
+
+ isci_remote_device_not_ready(ihost, idev,
+ SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED);
+ }
+}
+
+static void scic_sds_remote_device_stopping_state_enter(
+ struct sci_base_object *object)
+{
+ struct scic_sds_remote_device *sci_dev = (struct scic_sds_remote_device *)object;
+
+ SET_STATE_HANDLER(
+ sci_dev,
+ scic_sds_remote_device_state_handler_table,
+ SCI_BASE_REMOTE_DEVICE_STATE_STOPPING
+ );
+}
+
+static void scic_sds_remote_device_failed_state_enter(
+ struct sci_base_object *object)
+{
+ struct scic_sds_remote_device *sci_dev = (struct scic_sds_remote_device *)object;
+
+ SET_STATE_HANDLER(
+ sci_dev,
+ scic_sds_remote_device_state_handler_table,
+ SCI_BASE_REMOTE_DEVICE_STATE_FAILED
+ );
+}
+
+static void scic_sds_remote_device_resetting_state_enter(
+ struct sci_base_object *object)
+{
+ struct scic_sds_remote_device *sci_dev = (struct scic_sds_remote_device *)object;
+
+ SET_STATE_HANDLER(
+ sci_dev,
+ scic_sds_remote_device_state_handler_table,
+ SCI_BASE_REMOTE_DEVICE_STATE_RESETTING
+ );
+
+ scic_sds_remote_node_context_suspend(
+ &sci_dev->rnc, SCI_SOFTWARE_SUSPENSION, NULL, NULL);
+}
+
+static void scic_sds_remote_device_resetting_state_exit(
+ struct sci_base_object *object)
+{
+ struct scic_sds_remote_device *sci_dev = (struct scic_sds_remote_device *)object;
+
+ scic_sds_remote_node_context_resume(&sci_dev->rnc, NULL, NULL);
+}
+
+static void scic_sds_remote_device_final_state_enter(
+ struct sci_base_object *object)
+{
+ struct scic_sds_remote_device *sci_dev = (struct scic_sds_remote_device *)object;
+
+ SET_STATE_HANDLER(
+ sci_dev,
+ scic_sds_remote_device_state_handler_table,
+ SCI_BASE_REMOTE_DEVICE_STATE_FINAL
+ );
+}
+
+
+static const struct sci_base_state scic_sds_remote_device_state_table[] = {
+ [SCI_BASE_REMOTE_DEVICE_STATE_INITIAL] = {
+ .enter_state = scic_sds_remote_device_initial_state_enter,
+ },
+ [SCI_BASE_REMOTE_DEVICE_STATE_STOPPED] = {
+ .enter_state = scic_sds_remote_device_stopped_state_enter,
+ },
+ [SCI_BASE_REMOTE_DEVICE_STATE_STARTING] = {
+ .enter_state = scic_sds_remote_device_starting_state_enter,
+ },
+ [SCI_BASE_REMOTE_DEVICE_STATE_READY] = {
+ .enter_state = scic_sds_remote_device_ready_state_enter,
+ .exit_state = scic_sds_remote_device_ready_state_exit
+ },
+ [SCI_BASE_REMOTE_DEVICE_STATE_STOPPING] = {
+ .enter_state = scic_sds_remote_device_stopping_state_enter,
+ },
+ [SCI_BASE_REMOTE_DEVICE_STATE_FAILED] = {
+ .enter_state = scic_sds_remote_device_failed_state_enter,
+ },
+ [SCI_BASE_REMOTE_DEVICE_STATE_RESETTING] = {
+ .enter_state = scic_sds_remote_device_resetting_state_enter,
+ .exit_state = scic_sds_remote_device_resetting_state_exit
+ },
+ [SCI_BASE_REMOTE_DEVICE_STATE_FINAL] = {
+ .enter_state = scic_sds_remote_device_final_state_enter,
+ },
+};
+
+/**
+ * scic_remote_device_construct() - This method will perform the construction
+ * common to all remote device objects.
+ * @sci_port: SAS/SATA port through which this device is accessed.
+ * @sci_dev: remote device to construct
+ *
+ * It isn't necessary to call scic_remote_device_destruct() for device objects
+ * that have only called this method for construction. Once subsequent
+ * construction methods have been invoked (e.g.
+ * scic_remote_device_da_construct()), then destruction should occur. none
+ */
+static void scic_remote_device_construct(struct scic_sds_port *sci_port,
+ struct scic_sds_remote_device *sci_dev)
+{
+ sci_dev->owning_port = sci_port;
+ sci_dev->started_request_count = 0;
+ sci_dev->parent.private = NULL;
+
+ sci_base_state_machine_construct(
+ &sci_dev->state_machine,
+ &sci_dev->parent,
+ scic_sds_remote_device_state_table,
+ SCI_BASE_REMOTE_DEVICE_STATE_INITIAL
+ );
+
+ sci_base_state_machine_start(
+ &sci_dev->state_machine
+ );
+
+ scic_sds_remote_node_context_construct(&sci_dev->rnc,
+ SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX);
+
+ sci_object_set_association(&sci_dev->rnc, sci_dev);
+}
+
+/**
+ * scic_remote_device_da_construct() - This method will construct a
+ * SCIC_REMOTE_DEVICE object for a direct attached (da) device. The
+ * information (e.g. IAF, Signature FIS, etc.) necessary to build the device
+ * is known to the SCI Core since it is contained in the scic_phy object.
+ * @remote_device: This parameter specifies the remote device to be destructed.
+ *
+ * The user must have previously called scic_remote_device_construct() Remote
+ * device objects are a limited resource. As such, they must be protected.
+ * Thus calls to construct and destruct are mutually exclusive and
+ * non-reentrant. Indicate if the remote device was successfully constructed.
+ * SCI_SUCCESS Returned if the device was successfully constructed.
+ * SCI_FAILURE_DEVICE_EXISTS Returned if the device has already been
+ * constructed. If it's an additional phy for the target, then call
+ * scic_remote_device_da_add_phy(). SCI_FAILURE_UNSUPPORTED_PROTOCOL Returned
+ * if the supplied parameters necessitate creation of a remote device for which
+ * the protocol is not supported by the underlying controller hardware.
+ * SCI_FAILURE_INSUFFICIENT_RESOURCES This value is returned if the core
+ * controller associated with the supplied parameters is unable to support
+ * additional remote devices.
+ */
+static enum sci_status scic_remote_device_da_construct(struct scic_sds_remote_device *sci_dev)
+{
+ enum sci_status status;
+ u16 remote_node_index;
+ struct sci_sas_identify_address_frame_protocols protocols;
+
+ /*
+ * This information is request to determine how many remote node context
+ * entries will be needed to store the remote node.
+ */
+ scic_sds_port_get_attached_protocols(sci_dev->owning_port, &protocols);
+ sci_dev->target_protocols.u.all = protocols.u.all;
+ sci_dev->is_direct_attached = true;
+#if !defined(DISABLE_ATAPI)
+ sci_dev->is_atapi = scic_sds_remote_device_is_atapi(sci_dev);
+#endif
+
+ status = scic_sds_controller_allocate_remote_node_context(
+ sci_dev->owning_port->owning_controller,
+ sci_dev,
+ &remote_node_index);
+
+ if (status == SCI_SUCCESS) {
+ sci_dev->rnc.remote_node_index = remote_node_index;
+
+ scic_sds_port_get_attached_sas_address(
+ sci_dev->owning_port, &sci_dev->device_address);
+
+ if (sci_dev->target_protocols.u.bits.attached_ssp_target) {
+ sci_dev->has_ready_substate_machine = false;
+ } else if (sci_dev->target_protocols.u.bits.attached_stp_target) {
+ sci_dev->has_ready_substate_machine = true;
+
+ sci_base_state_machine_construct(
+ &sci_dev->ready_substate_machine,
+ &sci_dev->parent,
+ scic_sds_stp_remote_device_ready_substate_table,
+ SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_IDLE);
+ } else if (sci_dev->target_protocols.u.bits.attached_smp_target) {
+ sci_dev->has_ready_substate_machine = true;
+
+ /* add the SMP ready substate machine construction here */
+ sci_base_state_machine_construct(
+ &sci_dev->ready_substate_machine,
+ &sci_dev->parent,
+ scic_sds_smp_remote_device_ready_substate_table,
+ SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE);
+ }
+
+ sci_dev->connection_rate = scic_sds_port_get_max_allowed_speed(
+ sci_dev->owning_port);
+
+ /* / @todo Should I assign the port width by reading all of the phys on the port? */
+ sci_dev->device_port_width = 1;
+ }
+
+ return status;
+}
+
+static void scic_sds_remote_device_get_info_from_smp_discover_response(
+ struct scic_sds_remote_device *sci_dev,
+ struct smp_response_discover *discover_response)
+{
+ /* decode discover_response to set sas_address to sci_dev. */
+ sci_dev->device_address.high =
+ discover_response->attached_sas_address.high;
+
+ sci_dev->device_address.low =
+ discover_response->attached_sas_address.low;
+
+ sci_dev->target_protocols.u.all = discover_response->protocols.u.all;
+}
+
+/**
+ * scic_remote_device_ea_construct() - This method will construct an
+ * SCIC_REMOTE_DEVICE object for an expander attached (ea) device from an
+ * SMP Discover Response.
+ * @remote_device: This parameter specifies the remote device to be destructed.
+ * @discover_response: This parameter specifies the SMP Discovery Response to
+ * be used in device creation.
+ *
+ * The user must have previously called scic_remote_device_construct() Remote
+ * device objects are a limited resource. As such, they must be protected.
+ * Thus calls to construct and destruct are mutually exclusive and
+ * non-reentrant. Indicate if the remote device was successfully constructed.
+ * SCI_SUCCESS Returned if the device was successfully constructed.
+ * SCI_FAILURE_DEVICE_EXISTS Returned if the device has already been
+ * constructed. If it's an additional phy for the target, then call
+ * scic_ea_remote_device_add_phy(). SCI_FAILURE_UNSUPPORTED_PROTOCOL Returned
+ * if the supplied parameters necessitate creation of a remote device for which
+ * the protocol is not supported by the underlying controller hardware.
+ * SCI_FAILURE_INSUFFICIENT_RESOURCES This value is returned if the core
+ * controller associated with the supplied parameters is unable to support
+ * additional remote devices.
+ */
+static enum sci_status scic_remote_device_ea_construct(struct scic_sds_remote_device *sci_dev,
+ struct smp_response_discover *discover_response)
+{
+ enum sci_status status;
+ struct scic_sds_controller *scic;
+
+ scic = scic_sds_port_get_controller(sci_dev->owning_port);
+
+ scic_sds_remote_device_get_info_from_smp_discover_response(
+ sci_dev, discover_response);
+
+ status = scic_sds_controller_allocate_remote_node_context(
+ scic, sci_dev, &sci_dev->rnc.remote_node_index);
+
+ if (status == SCI_SUCCESS) {
+ if (sci_dev->target_protocols.u.bits.attached_ssp_target) {
+ sci_dev->has_ready_substate_machine = false;
+ } else if (sci_dev->target_protocols.u.bits.attached_smp_target) {
+ sci_dev->has_ready_substate_machine = true;
+
+ /* add the SMP ready substate machine construction here */
+ sci_base_state_machine_construct(
+ &sci_dev->ready_substate_machine,
+ &sci_dev->parent,
+ scic_sds_smp_remote_device_ready_substate_table,
+ SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE);
+ } else if (sci_dev->target_protocols.u.bits.attached_stp_target) {
+ sci_dev->has_ready_substate_machine = true;
+
+ sci_base_state_machine_construct(
+ &sci_dev->ready_substate_machine,
+ &sci_dev->parent,
+ scic_sds_stp_remote_device_ready_substate_table,
+ SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_IDLE);
+ }
+
+ /*
+ * For SAS-2 the physical link rate is actually a logical link
+ * rate that incorporates multiplexing. The SCU doesn't
+ * incorporate multiplexing and for the purposes of the
+ * connection the logical link rate is that same as the
+ * physical. Furthermore, the SAS-2 and SAS-1.1 fields overlay
+ * one another, so this code works for both situations. */
+ sci_dev->connection_rate = min_t(u16,
+ scic_sds_port_get_max_allowed_speed(sci_dev->owning_port),
+ discover_response->u2.sas1_1.negotiated_physical_link_rate
+ );
+
+ /* / @todo Should I assign the port width by reading all of the phys on the port? */
+ sci_dev->device_port_width = 1;
+ }
+
+ return status;
+}
+
+/**
+ * scic_remote_device_start() - This method will start the supplied remote
+ * device. This method enables normal IO requests to flow through to the
+ * remote device.
+ * @remote_device: This parameter specifies the device to be started.
+ * @timeout: This parameter specifies the number of milliseconds in which the
+ * start operation should complete.
+ *
+ * An indication of whether the device was successfully started. SCI_SUCCESS
+ * This value is returned if the device was successfully started.
+ * SCI_FAILURE_INVALID_PHY This value is returned if the user attempts to start
+ * the device when there have been no phys added to it.
+ */
+static enum sci_status scic_remote_device_start(struct scic_sds_remote_device *sci_dev,
+ u32 timeout)
+{
+ return sci_dev->state_handlers->start_handler(sci_dev);
+}
/**
* isci_remote_device_construct() - This function calls the scic remote device
@@ -307,51 +1870,6 @@
}
/**
- * isci_remote_device_stop_complete() - This function is called by the scic
- * when the remote device stop has completed. We mark the isci device as not
- * ready and remove the isci remote device.
- * @isci_host: This parameter specifies the isci host object.
- * @isci_device: This parameter specifies the remote device.
- * @status: This parameter specifies status of the completion.
- *
- */
-void isci_remote_device_stop_complete(
- struct isci_host *isci_host,
- struct isci_remote_device *isci_device,
- enum sci_status status)
-{
- dev_dbg(&isci_host->pdev->dev,
- "%s: complete isci_device = %p, status = 0x%x\n",
- __func__,
- isci_device,
- status);
-
- isci_remote_device_change_state(isci_device, isci_stopped);
-
- /* after stop, we can tear down resources. */
- isci_remote_device_deconstruct(isci_host, isci_device);
-
-}
-
-/**
- * isci_remote_device_start_complete() - This function is called by the scic
- * when the remote device start has completed
- * @isci_host: This parameter specifies the isci host object.
- * @isci_device: This parameter specifies the remote device.
- * @status: This parameter specifies status of the completion.
- *
- */
-void isci_remote_device_start_complete(
- struct isci_host *isci_host,
- struct isci_remote_device *isci_device,
- enum sci_status status)
-{
-
-
-}
-
-
-/**
* isci_remote_device_stop() - This function is called internally to stop the
* remote device.
* @isci_host: This parameter specifies the isci host object.
@@ -572,21 +2090,3 @@
}
spin_unlock_irqrestore(&ihost->scic_lock, flags);
}
-
-/**
- * isci_remote_device_change_state() - This function gets the status of the
- * remote_device object.
- * @isci_device: This parameter points to the isci_remote_device object
- *
- * status of the object as a isci_status enum.
- */
-void isci_remote_device_change_state(
- struct isci_remote_device *isci_device,
- enum isci_status status)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&isci_device->state_lock, flags);
- isci_device->status = status;
- spin_unlock_irqrestore(&isci_device->state_lock, flags);
-}