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7c40a80358
Prepare the timer api for the arrival of dynamic creation and destruction events from the core. It pretended to do this previously but the core to date only used it in a static init-time only fashion. This is an interim fix until a cleaner event queue can be developed. 1/ make all locking external to the api (add WARN_ONCE to verify) 2/ add a timer_destroy interface (to be used by the core) 3/ use del_timer_sync() prior to deallocating timer data 4/ delete the "timer_list" indirection, we only have timers allocated for the isci_host 5/ fix detection of timer list allocation errors Signed-off-by: Dan Williams <dan.j.williams@intel.com>
374 lines
15 KiB
C
374 lines
15 KiB
C
/*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _ISCI_EVENT_H_
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#define _ISCI_EVENT_H_
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/**
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* isci_event_timer_create() - This callback method asks the user to create a
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* timer and provide a handle for this timer for use in further timer
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* interactions.
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* @controller: This parameter specifies the controller with which this timer
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* is to be associated.
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* @timer_callback: This parameter specifies the callback method to be invoked
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* whenever the timer expires.
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* @cookie: This parameter specifies a piece of information that the user must
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* retain. This cookie is to be supplied by the user anytime a timeout
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* occurs for the created timer.
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*
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* The "timer_callback" method should be executed in a mutually exlusive manner
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* from the controller completion handler handler. This method returns a handle
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* to a timer object created by the user. The handle will be utilized for all
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* further interactions relating to this timer.
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*/
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void *isci_event_timer_create(
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struct scic_sds_controller *controller,
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void (*timer_callback)(void *),
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void *cookie);
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/**
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* isci_event_timer_start() - This callback method asks the user to start the
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* supplied timer.
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* @controller: This parameter specifies the controller with which this timer
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* is to associated.
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* @timer: This parameter specifies the timer to be started.
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* @milliseconds: This parameter specifies the number of milliseconds for which
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* to stall. The operating system driver is allowed to round this value up
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* where necessary.
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*
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* All timers in the system started by the SCI Core are one shot timers.
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* Therefore, the SCI user should make sure that it removes the timer from it's
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* list when a timer actually fires. Additionally, SCI Core user's should be
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* able to handle calls from the SCI Core to stop a timer that may already be
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* stopped. none
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*/
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void isci_event_timer_start(
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struct scic_sds_controller *controller,
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void *timer,
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u32 milliseconds);
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/**
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* isci_event_timer_stop() - This callback method asks the user to stop the
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* supplied timer.
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* @controller: This parameter specifies the controller with which this timer
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* is to associated.
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* @timer: This parameter specifies the timer to be stopped.
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*
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*/
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void isci_event_timer_stop(
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struct scic_sds_controller *controller,
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void *timer);
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void isci_event_timer_destroy(struct scic_sds_controller *scic, void *timer);
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/**
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* isci_event_controller_start_complete() - This user callback will inform the
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* user that the controller has finished the start process.
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* @controller: This parameter specifies the controller that was started.
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* @completion_status: This parameter specifies the results of the start
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* operation. SCI_SUCCESS indicates successful completion.
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*
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*/
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void isci_event_controller_start_complete(
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struct scic_sds_controller *controller,
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enum sci_status completion_status);
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/**
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* isci_event_controller_stop_complete() - This user callback will inform the
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* user that the controller has finished the stop process.
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* @controller: This parameter specifies the controller that was stopped.
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* @completion_status: This parameter specifies the results of the stop
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* operation. SCI_SUCCESS indicates successful completion.
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*
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*/
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void isci_event_controller_stop_complete(
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struct scic_sds_controller *controller,
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enum sci_status completion_status);
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/**
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* isci_event_io_request_complete() - This user callback will inform the user
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* that an IO request has completed.
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* @controller: This parameter specifies the controller on which the IO is
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* completing.
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* @remote_device: This parameter specifies the remote device on which this IO
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* request is completing.
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* @io_request: This parameter specifies the IO request that has completed.
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* @completion_status: This parameter specifies the results of the IO request
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* operation. SCI_SUCCESS indicates successful completion.
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*
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*/
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void isci_event_io_request_complete(
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struct scic_sds_controller *controller,
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struct scic_sds_remote_device *remote_device,
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struct scic_sds_request *scic_io_request,
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enum sci_io_status completion_status);
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/**
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* isci_event_task_request_complete() - This user callback will inform the user
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* that a task management request completed.
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* @controller: This parameter specifies the controller on which the task
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* management request is completing.
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* @remote_device: This parameter specifies the remote device on which this
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* task management request is completing.
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* @task_request: This parameter specifies the task management request that has
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* completed.
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* @completion_status: This parameter specifies the results of the IO request
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* operation. SCI_SUCCESS indicates successful completion.
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*
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*/
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void isci_event_task_request_complete(
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struct scic_sds_controller *controller,
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struct scic_sds_remote_device *remote_device,
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struct scic_sds_request *scic_task_request,
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enum sci_task_status completion_status);
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/**
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* isci_event_port_stop_complete() - This method informs the user when a stop
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* operation on the port has completed.
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* @controller: This parameter represents the controller which contains the
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* port.
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* @port: This parameter specifies the SCI port object for which the callback
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* is being invoked.
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* @completion_status: This parameter specifies the status for the operation
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* being completed.
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*
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*/
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void isci_event_port_stop_complete(
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struct scic_sds_controller *controller,
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struct scic_sds_port *port,
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enum sci_status completion_status);
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/**
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* isci_event_port_hard_reset_complete() - This method informs the user when a
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* hard reset on the port has completed. This hard reset could have been
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* initiated by the user or by the remote port.
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* @controller: This parameter represents the controller which contains the
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* port.
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* @port: This parameter specifies the SCI port object for which the callback
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* is being invoked.
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* @completion_status: This parameter specifies the status for the operation
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* being completed.
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*
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*/
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void isci_event_port_hard_reset_complete(
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struct scic_sds_controller *controller,
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struct scic_sds_port *port,
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enum sci_status completion_status);
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/**
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* isci_event_port_ready() - This method informs the user that the port is now
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* in a ready state and can be utilized to issue IOs.
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* @controller: This parameter represents the controller which contains the
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* port.
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* @port: This parameter specifies the SCI port object for which the callback
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* is being invoked.
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*
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*/
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void isci_event_port_ready(
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struct scic_sds_controller *controller,
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struct scic_sds_port *port);
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/**
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* isci_event_port_not_ready() - This method informs the user that the port is
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* now not in a ready (i.e. busy) state and can't be utilized to issue IOs.
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* @controller: This parameter represents the controller which contains the
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* port.
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* @port: This parameter specifies the SCI port object for which the callback
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* is being invoked.
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* @reason_code: This parameter specifies the reason for the port not ready
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* callback.
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*
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*/
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void isci_event_port_not_ready(
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struct scic_sds_controller *controller,
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struct scic_sds_port *port,
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u32 reason_code);
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/**
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* isci_event_port_invalid_link_up() - This method informs the SCI Core user
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* that a phy/link became ready, but the phy is not allowed in the port. In
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* some situations the underlying hardware only allows for certain phy to port
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* mappings. If these mappings are violated, then this API is invoked.
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* @controller: This parameter represents the controller which contains the
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* port.
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* @port: This parameter specifies the SCI port object for which the callback
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* is being invoked.
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* @phy: This parameter specifies the phy that came ready, but the phy can't be
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* a valid member of the port.
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*
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*/
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void isci_event_port_invalid_link_up(
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struct scic_sds_controller *controller,
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struct scic_sds_port *port,
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struct scic_sds_phy *phy);
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/**
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* isci_event_port_bc_change_primitive_received() - This callback method informs
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* the user that a broadcast change primitive was received.
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* @controller: This parameter represents the controller which contains the
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* port.
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* @port: This parameter specifies the SCI port object for which the callback
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* is being invoked. For instances where the phy on which the primitive was
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* received is not part of a port, this parameter will be
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* NULL.
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* @phy: This parameter specifies the phy on which the primitive was received.
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*
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*/
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void isci_event_port_bc_change_primitive_received(
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struct scic_sds_controller *controller,
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struct scic_sds_port *port,
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struct scic_sds_phy *phy);
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/**
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* isci_event_port_link_up() - This callback method informs the user that a phy
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* has become operational and is capable of communicating with the remote
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* end point.
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* @controller: This parameter represents the controller associated with the
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* phy.
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* @port: This parameter specifies the port object for which the user callback
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* is being invoked. There may be conditions where this parameter can be
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* NULL
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* @phy: This parameter specifies the phy object for which the user callback is
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* being invoked.
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*
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*/
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void isci_event_port_link_up(
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struct scic_sds_controller *controller,
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struct scic_sds_port *port,
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struct scic_sds_phy *phy);
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/**
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* isci_event_port_link_down() - This callback method informs the user that a
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* phy is no longer operational and is not capable of communicating with the
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* remote end point.
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* @controller: This parameter represents the controller associated with the
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* phy.
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* @port: This parameter specifies the port object for which the user callback
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* is being invoked. There may be conditions where this parameter can be
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* NULL
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* @phy: This parameter specifies the phy object for which the user callback is
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* being invoked.
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*
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*/
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void isci_event_port_link_down(
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struct scic_sds_controller *controller,
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struct scic_sds_port *port,
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struct scic_sds_phy *phy);
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/**
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* isci_event_remote_device_start_complete() - This user callback method will
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* inform the user that a start operation has completed.
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* @controller: This parameter specifies the core controller associated with
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* the completion callback.
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* @remote_device: This parameter specifies the remote device associated with
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* the completion callback.
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* @completion_status: This parameter specifies the completion status for the
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* operation.
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*
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*/
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void isci_event_remote_device_start_complete(
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struct scic_sds_controller *controller,
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struct scic_sds_remote_device *remote_device,
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enum sci_status completion_status);
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/**
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* isci_event_remote_device_stop_complete() - This user callback method will
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* inform the user that a stop operation has completed.
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* @controller: This parameter specifies the core controller associated with
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* the completion callback.
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* @remote_device: This parameter specifies the remote device associated with
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* the completion callback.
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* @completion_status: This parameter specifies the completion status for the
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* operation.
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*
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*/
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void isci_event_remote_device_stop_complete(
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struct scic_sds_controller *controller,
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struct scic_sds_remote_device *remote_device,
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enum sci_status completion_status);
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/**
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* isci_event_remote_device_ready() - This user callback method will inform the
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* user that a remote device is now capable of handling IO requests.
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* @controller: This parameter specifies the core controller associated with
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* the completion callback.
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* @remote_device: This parameter specifies the remote device associated with
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* the callback.
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*
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*/
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void isci_event_remote_device_ready(
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struct scic_sds_controller *controller,
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struct scic_sds_remote_device *remote_device);
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/**
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* isci_event_remote_device_not_ready() - This user callback method will inform
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* the user that a remote device is no longer capable of handling IO
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* requests (until a ready callback is invoked).
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* @controller: This parameter specifies the core controller associated with
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* the completion callback.
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* @remote_device: This parameter specifies the remote device associated with
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* the callback.
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* @reason_code: This paramete specifies the reason the remote device is not
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* ready.
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*
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*/
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void isci_event_remote_device_not_ready(
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struct scic_sds_controller *controller,
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struct scic_sds_remote_device *remote_device,
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u32 reason_code);
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#endif
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