1 /******************************************************************************
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
8 * Copyright(c) 2007 - 2012 Intel Corporation. All rights reserved.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * The full GNU General Public License is included in this distribution
25 * in the file called LICENSE.GPL.
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
33 * Copyright(c) 2005 - 2012 Intel Corporation. All rights reserved.
34 * All rights reserved.
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37 * modification, are permitted provided that the following conditions
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41 * notice, this list of conditions and the following disclaimer.
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43 * notice, this list of conditions and the following disclaimer in
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48 * from this software without specific prior written permission.
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51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 *****************************************************************************/
63 #include <linux/sched.h>
65 #include "iwl-notif-wait.h"
68 void iwl_notification_wait_init(struct iwl_notif_wait_data *notif_wait)
70 spin_lock_init(¬if_wait->notif_wait_lock);
71 INIT_LIST_HEAD(¬if_wait->notif_waits);
72 init_waitqueue_head(¬if_wait->notif_waitq);
75 void iwl_notification_wait_notify(struct iwl_notif_wait_data *notif_wait,
76 struct iwl_rx_packet *pkt)
78 if (!list_empty(¬if_wait->notif_waits)) {
79 struct iwl_notification_wait *w;
81 spin_lock(¬if_wait->notif_wait_lock);
82 list_for_each_entry(w, ¬if_wait->notif_waits, list) {
83 if (w->cmd != pkt->hdr.cmd)
87 w->fn(notif_wait, pkt, w->fn_data);
89 spin_unlock(¬if_wait->notif_wait_lock);
91 wake_up_all(¬if_wait->notif_waitq);
95 void iwl_abort_notification_waits(struct iwl_notif_wait_data *notif_wait)
98 struct iwl_notification_wait *wait_entry;
100 spin_lock_irqsave(¬if_wait->notif_wait_lock, flags);
101 list_for_each_entry(wait_entry, ¬if_wait->notif_waits, list)
102 wait_entry->aborted = true;
103 spin_unlock_irqrestore(¬if_wait->notif_wait_lock, flags);
105 wake_up_all(¬if_wait->notif_waitq);
110 iwl_init_notification_wait(struct iwl_notif_wait_data *notif_wait,
111 struct iwl_notification_wait *wait_entry,
113 void (*fn)(struct iwl_notif_wait_data *notif_wait,
114 struct iwl_rx_packet *pkt, void *data),
118 wait_entry->fn_data = fn_data;
119 wait_entry->cmd = cmd;
120 wait_entry->triggered = false;
121 wait_entry->aborted = false;
123 spin_lock_bh(¬if_wait->notif_wait_lock);
124 list_add(&wait_entry->list, ¬if_wait->notif_waits);
125 spin_unlock_bh(¬if_wait->notif_wait_lock);
128 int iwl_wait_notification(struct iwl_notif_wait_data *notif_wait,
129 struct iwl_notification_wait *wait_entry,
130 unsigned long timeout)
134 ret = wait_event_timeout(notif_wait->notif_waitq,
135 wait_entry->triggered || wait_entry->aborted,
138 spin_lock_bh(¬if_wait->notif_wait_lock);
139 list_del(&wait_entry->list);
140 spin_unlock_bh(¬if_wait->notif_wait_lock);
142 if (wait_entry->aborted)
145 /* return value is always >= 0 */
151 void iwl_remove_notification(struct iwl_notif_wait_data *notif_wait,
152 struct iwl_notification_wait *wait_entry)
154 spin_lock_bh(¬if_wait->notif_wait_lock);
155 list_del(&wait_entry->list);
156 spin_unlock_bh(¬if_wait->notif_wait_lock);