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Diffstat (limited to 'drivers/scsi/isci/core/sci_base_request.h')
| -rw-r--r-- | drivers/scsi/isci/core/sci_base_request.h | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/drivers/scsi/isci/core/sci_base_request.h b/drivers/scsi/isci/core/sci_base_request.h new file mode 100644 index 000000000000..d1b2195b228a --- /dev/null +++ b/drivers/scsi/isci/core/sci_base_request.h @@ -0,0 +1,195 @@ +/* + * 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_REQUST_H_ +#define _SCI_BASE_REQUST_H_ + +/** + * This file contains all of the constants, types, and method declarations for + * the SCI base IO and task request objects. + * + * + */ + +#include "sci_base_state_machine.h" + +/** + * enum sci_base_request_states - This enumeration depicts all the states for + * the common request state machine. + * + * + */ +enum sci_base_request_states { + /** + * Simply the initial state for the base request state machine. + */ + SCI_BASE_REQUEST_STATE_INITIAL, + + /** + * This state indicates that the request has been constructed. This state + * is entered from the INITIAL state. + */ + SCI_BASE_REQUEST_STATE_CONSTRUCTED, + + /** + * This state indicates that the request has been started. This state is + * entered from the CONSTRUCTED state. + */ + SCI_BASE_REQUEST_STATE_STARTED, + + /** + * This state indicates that the request has completed. + * This state is entered from the STARTED state. This state is entered from + * the ABORTING state. + */ + SCI_BASE_REQUEST_STATE_COMPLETED, + + /** + * This state indicates that the request is in the process of being + * terminated/aborted. + * This state is entered from the CONSTRUCTED state. + * This state is entered from the STARTED state. + */ + SCI_BASE_REQUEST_STATE_ABORTING, + + /** + * Simply the final state for the base request state machine. + */ + SCI_BASE_REQUEST_STATE_FINAL, +}; + +/** + * struct sci_base_request - The base request object abstracts the fields + * common to all SCI IO and task request objects. + * + * + */ +struct sci_base_request { + /** + * The field specifies that the parent object for the base request is the + * base object itself. + */ + struct sci_base_object parent; + + /** + * This field contains the information for the base request state machine. + */ + struct sci_base_state_machine state_machine; +}; + +typedef enum sci_status (*SCI_BASE_REQUEST_HANDLER_T)( + struct sci_base_request *this_request + ); + +/** + * struct sci_base_request_state_handler - This structure contains all of the + * state handler methods common to base IO and task request 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_request_state_handler { + /** + * The start_handler specifies the method invoked when a user attempts to + * start a request. + */ + SCI_BASE_REQUEST_HANDLER_T start_handler; + + /** + * The abort_handler specifies the method invoked when a user attempts to + * abort a request. + */ + SCI_BASE_REQUEST_HANDLER_T abort_handler; + + /** + * The complete_handler specifies the method invoked when a user attempts to + * complete a request. + */ + SCI_BASE_REQUEST_HANDLER_T complete_handler; + + /** + * The destruct_handler specifies the method invoked when a user attempts to + * destruct a request. + */ + SCI_BASE_REQUEST_HANDLER_T destruct_handler; + +}; + +/** + * sci_base_request_construct() - Construct the base request. + * @this_request: This parameter specifies the base request to be constructed. + * @state_table: This parameter specifies the table of state definitions to be + * utilized for the request state machine. + * + */ +static inline void sci_base_request_construct( + struct sci_base_request *base_req, + const struct sci_base_state *my_state_table) +{ + base_req->parent.private = NULL; + sci_base_state_machine_construct( + &base_req->state_machine, + &base_req->parent, + my_state_table, + SCI_BASE_REQUEST_STATE_INITIAL + ); + + sci_base_state_machine_start( + &base_req->state_machine + ); +} + +#endif /* _SCI_BASE_REQUST_H_ */ |