kernel-fxtec-pro1x/drivers/scsi/isci/smp_remote_device.c
Dan Williams 88f3b62ac1 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>
2011-07-03 04:00:38 -07:00

314 lines
12 KiB
C

/*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*
* BSD LICENSE
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
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* the documentation and/or other materials provided with the
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* from this software without specific prior written permission.
*
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "scic_sds_controller.h"
#include "scic_sds_port.h"
#include "remote_device.h"
#include "scic_sds_request.h"
#include "sci_environment.h"
#include "sci_util.h"
#include "scu_event_codes.h"
#include "scu_task_context.h"
/*
* *****************************************************************************
* * SMP REMOTE DEVICE READY IDLE SUBSTATE HANDLERS
* ***************************************************************************** */
/**
*
* @[in]: device The device the io is sent to.
* @[in]: request The io to start.
*
* This method will handle the start io operation for a SMP device that is in
* the idle state. enum sci_status
*/
static enum sci_status scic_sds_smp_remote_device_ready_idle_substate_start_io_handler(
struct scic_sds_remote_device *device,
struct scic_sds_request *request)
{
enum sci_status status;
/* Will the port allow the io request to start? */
status = device->owning_port->state_handlers->start_io_handler(
device->owning_port, device, request);
if (status == SCI_SUCCESS) {
status = scic_sds_remote_node_context_start_io(&device->rnc, request);
if (status == SCI_SUCCESS)
status = scic_sds_request_start(request);
if (status == SCI_SUCCESS) {
device->working_request = request;
sci_base_state_machine_change_state(
&device->ready_substate_machine,
SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_CMD
);
}
scic_sds_remote_device_start_request(device, request, status);
}
return status;
}
/*
* ******************************************************************************
* * SMP REMOTE DEVICE READY SUBSTATE CMD HANDLERS
* ****************************************************************************** */
/**
*
* @device: This is the device object that is receiving the IO.
* @request: The io to start.
*
* This device is already handling a command it can not accept new commands
* until this one is complete. enum sci_status
*/
static enum sci_status scic_sds_smp_remote_device_ready_cmd_substate_start_io_handler(
struct scic_sds_remote_device *device,
struct scic_sds_request *request)
{
return SCI_FAILURE_INVALID_STATE;
}
/**
* this is the complete_io_handler for smp device at ready cmd substate.
* @device: This is the device object that is receiving the IO.
* @request: The io to start.
*
* enum sci_status
*/
static enum sci_status
scic_sds_smp_remote_device_ready_cmd_substate_complete_io_handler(
struct scic_sds_remote_device *device,
struct scic_sds_request *request)
{
enum sci_status status;
struct scic_sds_request *sci_req;
sci_req = (struct scic_sds_request *)request;
status = scic_sds_io_request_complete(sci_req);
if (status == SCI_SUCCESS) {
status = scic_sds_port_complete_io(
device->owning_port, device, sci_req);
if (status == SCI_SUCCESS) {
scic_sds_remote_device_decrement_request_count(device);
sci_base_state_machine_change_state(
&device->ready_substate_machine,
SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE
);
} else
dev_err(scirdev_to_dev(device),
"%s: SCIC SDS Remote Device 0x%p io request "
"0x%p could not be completd on the port 0x%p "
"failed with status %d.\n",
__func__,
device,
sci_req,
device->owning_port,
status);
}
return status;
}
/**
* This is frame handler for smp device ready cmd substate.
* @sci_dev: This is the device object that is receiving the frame.
* @frame_index: The index for the frame received.
*
* enum sci_status
*/
static enum sci_status scic_sds_smp_remote_device_ready_cmd_substate_frame_handler(
struct scic_sds_remote_device *sci_dev,
u32 frame_index)
{
enum sci_status status;
/*
* / The device does not process any UF received from the hardware while
* / in this state. All unsolicited frames are forwarded to the io request
* / object. */
status = scic_sds_io_request_frame_handler(
sci_dev->working_request,
frame_index
);
return status;
}
/* --------------------------------------------------------------------------- */
static const struct scic_sds_remote_device_state_handler scic_sds_smp_remote_device_ready_substate_handler_table[] = {
[SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE] = {
.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_default_reset_handler,
.reset_complete_handler = scic_sds_remote_device_default_reset_complete_handler,
.start_io_handler = scic_sds_smp_remote_device_ready_idle_substate_start_io_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
},
[SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_CMD] = {
.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_default_reset_handler,
.reset_complete_handler = scic_sds_remote_device_default_reset_complete_handler,
.start_io_handler = scic_sds_smp_remote_device_ready_cmd_substate_start_io_handler,
.complete_io_handler = scic_sds_smp_remote_device_ready_cmd_substate_complete_io_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_smp_remote_device_ready_cmd_substate_frame_handler
}
};
/**
*
* @object: This is the struct sci_base_object which is cast into a
* struct scic_sds_remote_device.
*
* This is the SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE enter method.
* This function sets the ready cmd substate handlers and reports the device as
* ready. none
*/
static void scic_sds_smp_remote_device_ready_idle_substate_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_smp_remote_device_ready_substate_handler_table,
SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE);
isci_remote_device_ready(ihost, idev);
}
/**
*
* @object: This is the struct sci_base_object which is cast into a
* struct scic_sds_remote_device.
*
* This is the SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_CMD enter method. This
* function sets the remote device objects ready cmd substate handlers, and
* notify core user that the device is not ready. none
*/
static void scic_sds_smp_remote_device_ready_cmd_substate_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);
BUG_ON(sci_dev->working_request == NULL);
SET_STATE_HANDLER(sci_dev,
scic_sds_smp_remote_device_ready_substate_handler_table,
SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_CMD);
isci_remote_device_not_ready(ihost, idev,
SCIC_REMOTE_DEVICE_NOT_READY_SMP_REQUEST_STARTED);
}
/**
*
* @object: This is the struct sci_base_object which is cast into a
* struct scic_sds_remote_device.
*
* This is the SCIC_SDS_SSP_REMOTE_DEVICE_READY_SUBSTATE_CMD exit method. none
*/
static void scic_sds_smp_remote_device_ready_cmd_substate_exit(struct sci_base_object *object)
{
struct scic_sds_remote_device *sci_dev = container_of(object, typeof(*sci_dev),
parent);
sci_dev->working_request = NULL;
}
/* --------------------------------------------------------------------------- */
const struct sci_base_state scic_sds_smp_remote_device_ready_substate_table[] = {
[SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE] = {
.enter_state = scic_sds_smp_remote_device_ready_idle_substate_enter,
},
[SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_CMD] = {
.enter_state = scic_sds_smp_remote_device_ready_cmd_substate_enter,
.exit_state = scic_sds_smp_remote_device_ready_cmd_substate_exit,
},
};