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
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21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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61 *****************************************************************************/
62 #ifndef __iwl_notif_wait_h__
63 #define __iwl_notif_wait_h__
65 #include <linux/wait.h>
67 #include "iwl-trans.h"
69 struct iwl_notif_wait_data {
70 struct list_head notif_waits;
71 spinlock_t notif_wait_lock;
72 wait_queue_head_t notif_waitq;
75 #define MAX_NOTIF_CMDS 5
78 * struct iwl_notification_wait - notification wait entry
79 * @list: list head for global list
80 * @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.
85 * @n_cmds: number of command IDs
86 * @triggered: waiter should be woken up
87 * @aborted: wait was aborted
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().
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
101 struct iwl_notification_wait {
102 struct list_head list;
104 bool (*fn)(struct iwl_notif_wait_data *notif_data,
105 struct iwl_rx_packet *pkt, void *data);
108 u8 cmds[MAX_NOTIF_CMDS];
110 bool triggered, aborted;
114 /* caller functions */
115 void iwl_notification_wait_init(struct iwl_notif_wait_data *notif_data);
116 void iwl_notification_wait_notify(struct iwl_notif_wait_data *notif_data,
117 struct iwl_rx_packet *pkt);
118 void iwl_abort_notification_waits(struct iwl_notif_wait_data *notif_data);
121 void __acquires(wait_entry)
122 iwl_init_notification_wait(struct iwl_notif_wait_data *notif_data,
123 struct iwl_notification_wait *wait_entry,
124 const u8 *cmds, int n_cmds,
125 bool (*fn)(struct iwl_notif_wait_data *notif_data,
126 struct iwl_rx_packet *pkt, void *data),
129 int __must_check __releases(wait_entry)
130 iwl_wait_notification(struct iwl_notif_wait_data *notif_data,
131 struct iwl_notification_wait *wait_entry,
132 unsigned long timeout);
134 void __releases(wait_entry)
135 iwl_remove_notification(struct iwl_notif_wait_data *notif_data,
136 struct iwl_notification_wait *wait_entry);
138 #endif /* __iwl_notif_wait_h__ */