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Diffstat (limited to 'drivers/scsi/isci/timers.c')
| -rw-r--r-- | drivers/scsi/isci/timers.c | 245 |
1 files changed, 0 insertions, 245 deletions
diff --git a/drivers/scsi/isci/timers.c b/drivers/scsi/isci/timers.c deleted file mode 100644 index 007700e..0000000 --- a/drivers/scsi/isci/timers.c +++ /dev/null @@ -1,245 +0,0 @@ -/* - * 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. - */ - -#include "isci.h" -#include "timers.h" -#include "host.h" - -/** - * isci_timer_list_construct() - This method contrucst the SCI Timer List - * object used by the SCI Module class. The construction process involves - * creating isci_timer objects and adding them to the SCI Timer List - * object's list member. The number of isci_timer objects is determined by - * the timer_list_size parameter. - * @ihost: container of the timer list - * - * This method returns an error code indicating sucess or failure. The user - * should check for possible memory allocation error return otherwise, a zero - * indicates success. - */ -int isci_timer_list_construct(struct isci_host *ihost) -{ - struct isci_timer *itimer; - int i, err = 0; - - INIT_LIST_HEAD(&ihost->timers); - for (i = 0; i < SCI_MAX_TIMER_COUNT; i++) { - itimer = devm_kzalloc(&ihost->pdev->dev, sizeof(*itimer), GFP_KERNEL); - - if (!itimer) { - err = -ENOMEM; - break; - } - init_timer(&itimer->timer); - itimer->used = 0; - itimer->stopped = 1; - list_add(&itimer->node, &ihost->timers); - } - - return err; -} - -/** - * isci_timer_list_destroy() - This method destroys the SCI Timer List object - * used by the SCI Module class. The destruction process involves freeing - * memory allocated for isci_timer objects on the SCI Timer List object's - * timers list_head member. If any isci_timer objects are mark as "in use", - * they are not freed and the function returns an error code of -EBUSY. - * @ihost: container of the list to be destroyed - */ -void isci_timer_list_destroy(struct isci_host *ihost) -{ - struct isci_timer *timer; - LIST_HEAD(list); - - spin_lock_irq(&ihost->scic_lock); - list_splice_init(&ihost->timers, &list); - spin_unlock_irq(&ihost->scic_lock); - - list_for_each_entry(timer, &list, node) - del_timer_sync(&timer->timer); -} - -/** - * This method pulls an isci_timer object off of the list for the SCI Timer - * List object specified, marks the isci_timer as "in use" and initializes - * it with user callback function and cookie data. The timer is not start at - * this time, just reserved for the user. - * @isci_timer_list: This parameter points to the SCI Timer List from which the - * timer is reserved. - * @cookie: This parameter specifies a piece of information that the user must - * retain. This cookie is to be supplied by the user anytime a timeout - * occurs for the created timer. - * @timer_callback: This parameter specifies the callback method to be invoked - * whenever the timer expires. - * - * This method returns a pointer to an isci_timer object reserved from the SCI - * Timer List. The pointer will be utilized for all further interactions - * relating to this timer. - */ - -static void timer_function(unsigned long data) -{ - - struct isci_timer *timer = (struct isci_timer *)data; - struct isci_host *isci_host = timer->isci_host; - unsigned long flags; - - dev_dbg(&isci_host->pdev->dev, - "%s: isci_timer = %p\n", __func__, timer); - - if (isci_stopped == isci_host_get_state(isci_host)) { - timer->stopped = 1; - return; - } - - spin_lock_irqsave(&isci_host->scic_lock, flags); - - if (!timer->stopped) { - timer->stopped = 1; - timer->timer_callback(timer->cb_param); - } - - spin_unlock_irqrestore(&isci_host->scic_lock, flags); -} - - -struct isci_timer *isci_timer_create(struct isci_host *ihost, void *cb_param, - void (*timer_callback)(void *)) -{ - struct timer_list *timer; - struct isci_timer *isci_timer; - struct list_head *list = &ihost->timers; - - WARN_ONCE(!spin_is_locked(&ihost->scic_lock), - "%s: unlocked!\n", __func__); - - if (WARN_ONCE(list_empty(list), "%s: timer pool empty\n", __func__)) - return NULL; - - isci_timer = list_entry(list->next, struct isci_timer, node); - - isci_timer->used = 1; - isci_timer->stopped = 1; - /* FIXME: what!? we recycle the timer, rather than take it off - * the free list? - */ - list_move_tail(&isci_timer->node, list); - - timer = &isci_timer->timer; - timer->data = (unsigned long)isci_timer; - timer->function = timer_function; - isci_timer->cb_param = cb_param; - isci_timer->timer_callback = timer_callback; - isci_timer->isci_host = ihost; - - dev_dbg(&ihost->pdev->dev, - "%s: isci_timer = %p\n", __func__, isci_timer); - - return isci_timer; -} - -/* isci_del_timer() - This method frees the isci_timer, marking it "free to - * use", then places its back at the head of the timers list for the SCI - * Timer List object specified. - */ -void isci_del_timer(struct isci_host *ihost, struct isci_timer *isci_timer) -{ - struct list_head *list = &ihost->timers; - - WARN_ONCE(!spin_is_locked(&ihost->scic_lock), - "%s unlocked!\n", __func__); - - dev_dbg(&isci_timer->isci_host->pdev->dev, - "%s: isci_timer = %p\n", __func__, isci_timer); - - isci_timer->used = 0; - list_move(&isci_timer->node, list); - del_timer(&isci_timer->timer); - isci_timer->stopped = 1; -} - -/** - * isci_timer_start() - This method starts the specified isci_timer, with the - * specified timeout value. - * @isci_timer: This parameter specifies the timer to be started. - * @timeout: This parameter specifies the timeout, in milliseconds, after which - * the associated callback function will be called. - * - */ -void isci_timer_start(struct isci_timer *isci_timer, unsigned long tmo) -{ - struct timer_list *timer = &isci_timer->timer; - - dev_dbg(&isci_timer->isci_host->pdev->dev, - "%s: isci_timer = %p\n", __func__, isci_timer); - - isci_timer->stopped = 0; - mod_timer(timer, jiffies + msecs_to_jiffies(tmo)); -} - -/** - * isci_timer_stop() - This method stops the supplied isci_timer. - * @isci_timer: This parameter specifies the isci_timer to be stopped. - * - */ -void isci_timer_stop(struct isci_timer *isci_timer) -{ - dev_dbg(&isci_timer->isci_host->pdev->dev, - "%s: isci_timer = %p\n", __func__, isci_timer); - - isci_timer->stopped = 1; - del_timer(&isci_timer->timer); -} |