196 lines
6.3 KiB
C
196 lines
6.3 KiB
C
/******************************************************************************
|
|
*
|
|
* 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) 2007 - 2014 Intel Corporation. All rights reserved.
|
|
* Copyright(c) 2015 Intel Deutschland GmbH
|
|
*
|
|
* 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 Street, Fifth Floor, Boston, MA 02110,
|
|
* USA
|
|
*
|
|
* The full GNU General Public License is included in this distribution
|
|
* in the file called COPYING.
|
|
*
|
|
* Contact Information:
|
|
* Intel Linux Wireless <linuxwifi@intel.com>
|
|
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
|
|
*
|
|
* BSD LICENSE
|
|
*
|
|
* Copyright(c) 2005 - 2014 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 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 <linux/sched.h>
|
|
#include <linux/export.h>
|
|
|
|
#include "iwl-drv.h"
|
|
#include "iwl-notif-wait.h"
|
|
|
|
|
|
void iwl_notification_wait_init(struct iwl_notif_wait_data *notif_wait)
|
|
{
|
|
spin_lock_init(¬if_wait->notif_wait_lock);
|
|
INIT_LIST_HEAD(¬if_wait->notif_waits);
|
|
init_waitqueue_head(¬if_wait->notif_waitq);
|
|
}
|
|
IWL_EXPORT_SYMBOL(iwl_notification_wait_init);
|
|
|
|
bool iwl_notification_wait(struct iwl_notif_wait_data *notif_wait,
|
|
struct iwl_rx_packet *pkt)
|
|
{
|
|
bool triggered = false;
|
|
|
|
if (!list_empty(¬if_wait->notif_waits)) {
|
|
struct iwl_notification_wait *w;
|
|
|
|
spin_lock(¬if_wait->notif_wait_lock);
|
|
list_for_each_entry(w, ¬if_wait->notif_waits, list) {
|
|
int i;
|
|
bool found = false;
|
|
|
|
/*
|
|
* If it already finished (triggered) or has been
|
|
* aborted then don't evaluate it again to avoid races,
|
|
* Otherwise the function could be called again even
|
|
* though it returned true before
|
|
*/
|
|
if (w->triggered || w->aborted)
|
|
continue;
|
|
|
|
for (i = 0; i < w->n_cmds; i++) {
|
|
u16 rec_id = WIDE_ID(pkt->hdr.group_id,
|
|
pkt->hdr.cmd);
|
|
|
|
if (w->cmds[i] == rec_id ||
|
|
(!iwl_cmd_groupid(w->cmds[i]) &&
|
|
DEF_ID(w->cmds[i]) == rec_id)) {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!found)
|
|
continue;
|
|
|
|
if (!w->fn || w->fn(notif_wait, pkt, w->fn_data)) {
|
|
w->triggered = true;
|
|
triggered = true;
|
|
}
|
|
}
|
|
spin_unlock(¬if_wait->notif_wait_lock);
|
|
}
|
|
|
|
return triggered;
|
|
}
|
|
IWL_EXPORT_SYMBOL(iwl_notification_wait);
|
|
|
|
void iwl_abort_notification_waits(struct iwl_notif_wait_data *notif_wait)
|
|
{
|
|
struct iwl_notification_wait *wait_entry;
|
|
|
|
spin_lock(¬if_wait->notif_wait_lock);
|
|
list_for_each_entry(wait_entry, ¬if_wait->notif_waits, list)
|
|
wait_entry->aborted = true;
|
|
spin_unlock(¬if_wait->notif_wait_lock);
|
|
|
|
wake_up_all(¬if_wait->notif_waitq);
|
|
}
|
|
IWL_EXPORT_SYMBOL(iwl_abort_notification_waits);
|
|
|
|
void
|
|
iwl_init_notification_wait(struct iwl_notif_wait_data *notif_wait,
|
|
struct iwl_notification_wait *wait_entry,
|
|
const u16 *cmds, int n_cmds,
|
|
bool (*fn)(struct iwl_notif_wait_data *notif_wait,
|
|
struct iwl_rx_packet *pkt, void *data),
|
|
void *fn_data)
|
|
{
|
|
if (WARN_ON(n_cmds > MAX_NOTIF_CMDS))
|
|
n_cmds = MAX_NOTIF_CMDS;
|
|
|
|
wait_entry->fn = fn;
|
|
wait_entry->fn_data = fn_data;
|
|
wait_entry->n_cmds = n_cmds;
|
|
memcpy(wait_entry->cmds, cmds, n_cmds * sizeof(u16));
|
|
wait_entry->triggered = false;
|
|
wait_entry->aborted = false;
|
|
|
|
spin_lock_bh(¬if_wait->notif_wait_lock);
|
|
list_add(&wait_entry->list, ¬if_wait->notif_waits);
|
|
spin_unlock_bh(¬if_wait->notif_wait_lock);
|
|
}
|
|
IWL_EXPORT_SYMBOL(iwl_init_notification_wait);
|
|
|
|
int iwl_wait_notification(struct iwl_notif_wait_data *notif_wait,
|
|
struct iwl_notification_wait *wait_entry,
|
|
unsigned long timeout)
|
|
{
|
|
int ret;
|
|
|
|
ret = wait_event_timeout(notif_wait->notif_waitq,
|
|
wait_entry->triggered || wait_entry->aborted,
|
|
timeout);
|
|
|
|
spin_lock_bh(¬if_wait->notif_wait_lock);
|
|
list_del(&wait_entry->list);
|
|
spin_unlock_bh(¬if_wait->notif_wait_lock);
|
|
|
|
if (wait_entry->aborted)
|
|
return -EIO;
|
|
|
|
/* return value is always >= 0 */
|
|
if (ret <= 0)
|
|
return -ETIMEDOUT;
|
|
return 0;
|
|
}
|
|
IWL_EXPORT_SYMBOL(iwl_wait_notification);
|
|
|
|
void iwl_remove_notification(struct iwl_notif_wait_data *notif_wait,
|
|
struct iwl_notification_wait *wait_entry)
|
|
{
|
|
spin_lock_bh(¬if_wait->notif_wait_lock);
|
|
list_del(&wait_entry->list);
|
|
spin_unlock_bh(¬if_wait->notif_wait_lock);
|
|
}
|
|
IWL_EXPORT_SYMBOL(iwl_remove_notification);
|