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Johannes Berg4bd14dd2012-03-06 13:30:58 -08001/******************************************************************************
2 *
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.
5 *
6 * GPL LICENSE SUMMARY
7 *
Johannes Berg128e63e2013-01-21 21:39:26 +01008 * Copyright(c) 2007 - 2013 Intel Corporation. All rights reserved.
Johannes Berg4bd14dd2012-03-06 13:30:58 -08009 *
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.
13 *
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.
18 *
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,
22 * USA
23 *
24 * The full GNU General Public License is included in this distribution
Emmanuel Grumbach410dc5a2013-02-18 09:22:28 +020025 * in the file called COPYING.
Johannes Berg4bd14dd2012-03-06 13:30:58 -080026 *
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
30 *
31 * BSD LICENSE
32 *
Johannes Berg128e63e2013-01-21 21:39:26 +010033 * Copyright(c) 2005 - 2013 Intel Corporation. All rights reserved.
Johannes Berg4bd14dd2012-03-06 13:30:58 -080034 * All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 *
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 * distribution.
45 * * Neither the name Intel Corporation nor the names of its
46 * contributors may be used to endorse or promote products derived
47 * from this software without specific prior written permission.
48 *
49 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
50 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
51 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
52 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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55 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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59 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
60 *
61 *****************************************************************************/
62#ifndef __iwl_notif_wait_h__
63#define __iwl_notif_wait_h__
64
65#include <linux/wait.h>
66
Johannes Bergf8d7c1a2012-03-06 13:31:02 -080067#include "iwl-trans.h"
Johannes Berg4bd14dd2012-03-06 13:30:58 -080068
69struct iwl_notif_wait_data {
70 struct list_head notif_waits;
71 spinlock_t notif_wait_lock;
72 wait_queue_head_t notif_waitq;
73};
74
Johannes Bergdb662d42012-03-15 13:26:44 -070075#define MAX_NOTIF_CMDS 5
76
Johannes Berg4bd14dd2012-03-06 13:30:58 -080077/**
78 * struct iwl_notification_wait - notification wait entry
79 * @list: list head for global list
Johannes Bergdb662d42012-03-15 13:26:44 -070080 * @fn: Function called with the notification. If the function
81 * returns true, the wait is over, if it returns false then
82 * the waiter stays blocked. If no function is given, any
83 * of the listed commands will unblock the waiter.
84 * @cmds: command IDs
85 * @n_cmds: number of command IDs
86 * @triggered: waiter should be woken up
87 * @aborted: wait was aborted
Johannes Berg4bd14dd2012-03-06 13:30:58 -080088 *
89 * This structure is not used directly, to wait for a
90 * notification declare it on the stack, and call
91 * iwlagn_init_notification_wait() with appropriate
92 * parameters. Then do whatever will cause the ucode
93 * to notify the driver, and to wait for that then
94 * call iwlagn_wait_notification().
95 *
96 * Each notification is one-shot. If at some point we
97 * need to support multi-shot notifications (which
98 * can't be allocated on the stack) we need to modify
99 * the code for them.
100 */
101struct iwl_notification_wait {
102 struct list_head list;
103
Johannes Bergdb662d42012-03-15 13:26:44 -0700104 bool (*fn)(struct iwl_notif_wait_data *notif_data,
Johannes Berg4bd14dd2012-03-06 13:30:58 -0800105 struct iwl_rx_packet *pkt, void *data);
106 void *fn_data;
107
Johannes Bergdb662d42012-03-15 13:26:44 -0700108 u8 cmds[MAX_NOTIF_CMDS];
109 u8 n_cmds;
Johannes Berg4bd14dd2012-03-06 13:30:58 -0800110 bool triggered, aborted;
111};
112
113
114/* caller functions */
115void iwl_notification_wait_init(struct iwl_notif_wait_data *notif_data);
116void iwl_notification_wait_notify(struct iwl_notif_wait_data *notif_data,
117 struct iwl_rx_packet *pkt);
118void iwl_abort_notification_waits(struct iwl_notif_wait_data *notif_data);
119
120/* user functions */
121void __acquires(wait_entry)
122iwl_init_notification_wait(struct iwl_notif_wait_data *notif_data,
123 struct iwl_notification_wait *wait_entry,
Johannes Bergdb662d42012-03-15 13:26:44 -0700124 const u8 *cmds, int n_cmds,
125 bool (*fn)(struct iwl_notif_wait_data *notif_data,
Johannes Berg4bd14dd2012-03-06 13:30:58 -0800126 struct iwl_rx_packet *pkt, void *data),
127 void *fn_data);
128
129int __must_check __releases(wait_entry)
130iwl_wait_notification(struct iwl_notif_wait_data *notif_data,
131 struct iwl_notification_wait *wait_entry,
132 unsigned long timeout);
133
134void __releases(wait_entry)
135iwl_remove_notification(struct iwl_notif_wait_data *notif_data,
136 struct iwl_notification_wait *wait_entry);
137
138#endif /* __iwl_notif_wait_h__ */