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.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
40 * * Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * * Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in
44 * the documentation and/or other materials provided with the
46 * * Neither the name Intel Corporation nor the names of its
47 * contributors may be used to endorse or promote products derived
48 * from this software without specific prior written permission.
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 *****************************************************************************/
63 #include <linux/sched.h>
64 #include <linux/export.h>
66 #include "iwl-notif-wait.h"
69 void iwl_notification_wait_init(struct iwl_notif_wait_data
*notif_wait
)
71 spin_lock_init(¬if_wait
->notif_wait_lock
);
72 INIT_LIST_HEAD(¬if_wait
->notif_waits
);
73 init_waitqueue_head(¬if_wait
->notif_waitq
);
75 EXPORT_SYMBOL_GPL(iwl_notification_wait_init
);
77 void iwl_notification_wait_notify(struct iwl_notif_wait_data
*notif_wait
,
78 struct iwl_rx_packet
*pkt
)
80 bool triggered
= false;
82 if (!list_empty(¬if_wait
->notif_waits
)) {
83 struct iwl_notification_wait
*w
;
85 spin_lock(¬if_wait
->notif_wait_lock
);
86 list_for_each_entry(w
, ¬if_wait
->notif_waits
, list
) {
91 * If it already finished (triggered) or has been
92 * aborted then don't evaluate it again to avoid races,
93 * Otherwise the function could be called again even
94 * though it returned true before
96 if (w
->triggered
|| w
->aborted
)
99 for (i
= 0; i
< w
->n_cmds
; i
++) {
100 if (w
->cmds
[i
] == pkt
->hdr
.cmd
) {
108 if (!w
->fn
|| w
->fn(notif_wait
, pkt
, w
->fn_data
)) {
113 spin_unlock(¬if_wait
->notif_wait_lock
);
118 wake_up_all(¬if_wait
->notif_waitq
);
120 EXPORT_SYMBOL_GPL(iwl_notification_wait_notify
);
122 void iwl_abort_notification_waits(struct iwl_notif_wait_data
*notif_wait
)
124 struct iwl_notification_wait
*wait_entry
;
126 spin_lock(¬if_wait
->notif_wait_lock
);
127 list_for_each_entry(wait_entry
, ¬if_wait
->notif_waits
, list
)
128 wait_entry
->aborted
= true;
129 spin_unlock(¬if_wait
->notif_wait_lock
);
131 wake_up_all(¬if_wait
->notif_waitq
);
133 EXPORT_SYMBOL_GPL(iwl_abort_notification_waits
);
136 iwl_init_notification_wait(struct iwl_notif_wait_data
*notif_wait
,
137 struct iwl_notification_wait
*wait_entry
,
138 const u8
*cmds
, int n_cmds
,
139 bool (*fn
)(struct iwl_notif_wait_data
*notif_wait
,
140 struct iwl_rx_packet
*pkt
, void *data
),
143 if (WARN_ON(n_cmds
> MAX_NOTIF_CMDS
))
144 n_cmds
= MAX_NOTIF_CMDS
;
147 wait_entry
->fn_data
= fn_data
;
148 wait_entry
->n_cmds
= n_cmds
;
149 memcpy(wait_entry
->cmds
, cmds
, n_cmds
);
150 wait_entry
->triggered
= false;
151 wait_entry
->aborted
= false;
153 spin_lock_bh(¬if_wait
->notif_wait_lock
);
154 list_add(&wait_entry
->list
, ¬if_wait
->notif_waits
);
155 spin_unlock_bh(¬if_wait
->notif_wait_lock
);
157 EXPORT_SYMBOL_GPL(iwl_init_notification_wait
);
159 int iwl_wait_notification(struct iwl_notif_wait_data
*notif_wait
,
160 struct iwl_notification_wait
*wait_entry
,
161 unsigned long timeout
)
165 ret
= wait_event_timeout(notif_wait
->notif_waitq
,
166 wait_entry
->triggered
|| wait_entry
->aborted
,
169 spin_lock_bh(¬if_wait
->notif_wait_lock
);
170 list_del(&wait_entry
->list
);
171 spin_unlock_bh(¬if_wait
->notif_wait_lock
);
173 if (wait_entry
->aborted
)
176 /* return value is always >= 0 */
181 EXPORT_SYMBOL_GPL(iwl_wait_notification
);
183 void iwl_remove_notification(struct iwl_notif_wait_data
*notif_wait
,
184 struct iwl_notification_wait
*wait_entry
)
186 spin_lock_bh(¬if_wait
->notif_wait_lock
);
187 list_del(&wait_entry
->list
);
188 spin_unlock_bh(¬if_wait
->notif_wait_lock
);
190 EXPORT_SYMBOL_GPL(iwl_remove_notification
);