167 lines
6.1 KiB
C
167 lines
6.1 KiB
C
/*-
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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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*
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <dev/isci/isci.h>
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#include <dev/isci/scil/scif_user_callback.h>
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static void
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isci_timer_timeout(void *arg)
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{
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struct ISCI_TIMER *timer = (struct ISCI_TIMER *)arg;
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isci_log_message(3, "TIMER", "timeout %p\n", timer);
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/* callout_stop() will *not* keep the timer from running if it is
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* pending. callout_drain() cannot be called from interrupt context,
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* because it may cause thread to sleep which is not allowed in
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* interrupt context. So instead, check the is_started flag to see if
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* the timer routine should actually be run or not.
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*/
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if (timer->is_started == TRUE)
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timer->callback(timer->cookie);
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}
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/**
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* @brief This callback method asks the user to start the supplied timer.
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*
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* @warning All timers in the system started by the SCI Framework are one
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* shot timers. Therefore, the SCI user should make sure that it
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* removes the timer from it's list when a timer actually fires.
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* Additionally, SCI Framework user's should be able to handle
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* calls from the SCI Framework to stop a timer that may already
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* be stopped.
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*
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* @param[in] controller This parameter specifies the controller with
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* which this timer is to associated.
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* @param[in] timer This parameter specifies the timer to be started.
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* @param[in] milliseconds This parameter specifies the number of
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* milliseconds for which to stall. The operating system driver
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* is allowed to round this value up where necessary.
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*
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* @return none
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*/
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void
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scif_cb_timer_start(SCI_CONTROLLER_HANDLE_T controller, void *timer,
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uint32_t milliseconds)
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{
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struct ISCI_TIMER *isci_timer = (struct ISCI_TIMER *)timer;
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isci_timer->is_started = TRUE;
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isci_log_message(3, "TIMER", "start %p %d\n", timer, milliseconds);
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callout_reset_sbt(&isci_timer->callout, SBT_1MS * milliseconds, 0,
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isci_timer_timeout, timer, 0);
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}
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/**
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* @brief This callback method asks the user to stop the supplied timer.
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*
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* @param[in] controller This parameter specifies the controller with
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* which this timer is to associated.
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* @param[in] timer This parameter specifies the timer to be stopped.
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*
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* @return none
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*/
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void
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scif_cb_timer_stop(SCI_CONTROLLER_HANDLE_T controller, void *timer)
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{
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struct ISCI_TIMER *isci_timer = (struct ISCI_TIMER *)timer;
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isci_log_message(3, "TIMER", "stop %p\n", timer);
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isci_timer->is_started = FALSE;
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callout_stop(&isci_timer->callout);
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}
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/**
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* @brief This callback method asks the user to create a timer and provide
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* a handle for this timer for use in further timer interactions.
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*
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* @warning The "timer_callback" method should be executed in a mutually
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* exlusive manner from the controller completion handler
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* handler (refer to scic_controller_get_handler_methods()).
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*
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* @param[in] timer_callback This parameter specifies the callback method
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* to be invoked whenever the timer expires.
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* @param[in] controller This parameter specifies the controller with
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* which this timer is to be associated.
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* @param[in] cookie This parameter specifies a piece of information that
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* the user must retain. This cookie is to be supplied by the
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* user anytime a timeout occurs for the created timer.
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*
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* @return This method returns a handle to a timer object created by the
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* user. The handle will be utilized for all further interactions
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* relating to this timer.
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*/
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void *
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scif_cb_timer_create(SCI_CONTROLLER_HANDLE_T scif_controller,
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SCI_TIMER_CALLBACK_T timer_callback, void *cookie)
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{
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struct ISCI_CONTROLLER *isci_controller = (struct ISCI_CONTROLLER *)
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sci_object_get_association(scif_controller);
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struct ISCI_TIMER *timer;
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sci_pool_get(isci_controller->timer_pool, timer);
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callout_init_mtx(&timer->callout, &isci_controller->lock, FALSE);
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timer->callback = timer_callback;
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timer->cookie = cookie;
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timer->is_started = FALSE;
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isci_log_message(3, "TIMER", "create %p %p %p\n", timer, timer_callback, cookie);
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return (timer);
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}
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/**
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* @brief This callback method asks the user to destroy the supplied timer.
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*
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* @param[in] controller This parameter specifies the controller with
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* which this timer is to associated.
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* @param[in] timer This parameter specifies the timer to be destroyed.
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*
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* @return none
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*/
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void
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scif_cb_timer_destroy(SCI_CONTROLLER_HANDLE_T scif_controller,
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void *timer_handle)
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{
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struct ISCI_CONTROLLER *isci_controller = (struct ISCI_CONTROLLER *)
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sci_object_get_association(scif_controller);
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scif_cb_timer_stop(scif_controller, timer_handle);
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sci_pool_put(isci_controller->timer_pool, (struct ISCI_TIMER *)timer_handle);
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isci_log_message(3, "TIMER", "destroy %p\n", timer_handle);
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}
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