diff options
Diffstat (limited to 'drivers/scsi/isci/core/sci_base_remote_device.h')
-rw-r--r-- | drivers/scsi/isci/core/sci_base_remote_device.h | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/drivers/scsi/isci/core/sci_base_remote_device.h b/drivers/scsi/isci/core/sci_base_remote_device.h new file mode 100644 index 0000000..fe6614b --- /dev/null +++ b/drivers/scsi/isci/core/sci_base_remote_device.h @@ -0,0 +1,277 @@ +/* + * 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 + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _SCI_BASE_REMOTE_DEVICE_H_ +#define _SCI_BASE_REMOTE_DEVICE_H_ + +/** + * This file contains all of the structures, constants, and methods common to + * all remote device object definitions. + * + * + */ + +#include "sci_base_state_machine.h" + +struct sci_base_request; + +/** + * enum sci_base_remote_device_states - This enumeration depicts all the states + * for the common remote device state machine. + * + * + */ +enum sci_base_remote_device_states { + /** + * Simply the initial state for the base remote device state machine. + */ + SCI_BASE_REMOTE_DEVICE_STATE_INITIAL, + + /** + * This state indicates that the remote device has successfully been + * stopped. In this state no new IO operations are permitted. + * This state is entered from the INITIAL state. + * This state is entered from the STOPPING state. + */ + SCI_BASE_REMOTE_DEVICE_STATE_STOPPED, + + /** + * This state indicates the the remote device is in the process of + * becoming ready (i.e. starting). In this state no new IO operations + * are permitted. + * This state is entered from the STOPPED state. + */ + SCI_BASE_REMOTE_DEVICE_STATE_STARTING, + + /** + * This state indicates the remote device is now ready. Thus, the user + * is able to perform IO operations on the remote device. + * This state is entered from the STARTING state. + */ + SCI_BASE_REMOTE_DEVICE_STATE_READY, + + /** + * This state indicates that the remote device is in the process of + * stopping. In this state no new IO operations are permitted, but + * existing IO operations are allowed to complete. + * This state is entered from the READY state. + * This state is entered from the FAILED state. + */ + SCI_BASE_REMOTE_DEVICE_STATE_STOPPING, + + /** + * This state indicates that the remote device has failed. + * In this state no new IO operations are permitted. + * This state is entered from the INITIALIZING state. + * This state is entered from the READY state. + */ + SCI_BASE_REMOTE_DEVICE_STATE_FAILED, + + /** + * This state indicates the device is being reset. + * In this state no new IO operations are permitted. + * This state is entered from the READY state. + */ + SCI_BASE_REMOTE_DEVICE_STATE_RESETTING, + + /** + * Simply the final state for the base remote device state machine. + */ + SCI_BASE_REMOTE_DEVICE_STATE_FINAL, + + SCI_BASE_REMOTE_DEVICE_MAX_STATES + +}; + +/** + * struct sci_base_remote_device - The base remote device object abstracts the + * fields common to all SCI remote device objects. + * + * + */ +struct sci_base_remote_device { + /** + * The field specifies that the parent object for the base remote + * device is the base object itself. + */ + struct sci_base_object parent; + + /** + * This field contains the information for the base remote device state + * machine. + */ + struct sci_base_state_machine state_machine; +}; + + +typedef enum sci_status (*SCI_BASE_REMOTE_DEVICE_HANDLER_T)( + struct sci_base_remote_device * + ); + +typedef enum sci_status (*SCI_BASE_REMOTE_DEVICE_REQUEST_HANDLER_T)( + struct sci_base_remote_device *, + struct sci_base_request * + ); + +typedef enum sci_status (*SCI_BASE_REMOTE_DEVICE_HIGH_PRIORITY_REQUEST_COMPLETE_HANDLER_T)( + struct sci_base_remote_device *, + struct sci_base_request *, + void *, + enum sci_io_status + ); + +/** + * struct sci_base_remote_device_state_handler - This structure contains all of + * the state handler methods common to base remote device state machines. + * Handler methods provide the ability to change the behavior for user + * requests or transitions depending on the state the machine is in. + * + * + */ +struct sci_base_remote_device_state_handler { + /** + * The start_handler specifies the method invoked when a user attempts to + * start a remote device. + */ + SCI_BASE_REMOTE_DEVICE_HANDLER_T start_handler; + + /** + * The stop_handler specifies the method invoked when a user attempts to + * stop a remote device. + */ + SCI_BASE_REMOTE_DEVICE_HANDLER_T stop_handler; + + /** + * The fail_handler specifies the method invoked when a remote device + * failure has occurred. A failure may be due to an inability to + * initialize/configure the device. + */ + SCI_BASE_REMOTE_DEVICE_HANDLER_T fail_handler; + + /** + * The destruct_handler specifies the method invoked when attempting to + * destruct a remote device. + */ + SCI_BASE_REMOTE_DEVICE_HANDLER_T destruct_handler; + + /** + * The reset handler specifies the method invloked when requesting to reset a + * remote device. + */ + SCI_BASE_REMOTE_DEVICE_HANDLER_T reset_handler; + + /** + * The reset complete handler specifies the method invloked when reporting + * that a reset has completed to the remote device. + */ + SCI_BASE_REMOTE_DEVICE_HANDLER_T reset_complete_handler; + + /** + * The start_io_handler specifies the method invoked when a user + * attempts to start an IO request for a remote device. + */ + SCI_BASE_REMOTE_DEVICE_REQUEST_HANDLER_T start_io_handler; + + /** + * The complete_io_handler specifies the method invoked when a user + * attempts to complete an IO request for a remote device. + */ + SCI_BASE_REMOTE_DEVICE_REQUEST_HANDLER_T complete_io_handler; + + /** + * The continue_io_handler specifies the method invoked when a user + * attempts to continue an IO request for a remote device. + */ + SCI_BASE_REMOTE_DEVICE_REQUEST_HANDLER_T continue_io_handler; + + /** + * The start_task_handler specifies the method invoked when a user + * attempts to start a task management request for a remote device. + */ + SCI_BASE_REMOTE_DEVICE_REQUEST_HANDLER_T start_task_handler; + + /** + * The complete_task_handler specifies the method invoked when a user + * attempts to complete a task management request for a remote device. + */ + SCI_BASE_REMOTE_DEVICE_REQUEST_HANDLER_T complete_task_handler; + +}; + +/** + * sci_base_remote_device_construct() - Construct the base remote device + * @this_remote_device: This parameter specifies the base remote device to be + * constructed. + * @state_table: This parameter specifies the table of state definitions to be + * utilized for the remote device state machine. + * + */ +static inline void sci_base_remote_device_construct( + struct sci_base_remote_device *base_dev, + const struct sci_base_state *state_table) +{ + base_dev->parent.private = NULL; + sci_base_state_machine_construct( + &base_dev->state_machine, + &base_dev->parent, + state_table, + SCI_BASE_REMOTE_DEVICE_STATE_INITIAL + ); + + sci_base_state_machine_start( + &base_dev->state_machine + ); +} +#endif /* _SCI_BASE_REMOTE_DEVICE_H_ */ |