| /****************************************************************************** |
| * |
| * 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 - 2013 Intel Corporation. All rights reserved. |
| * |
| * 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 LICENSE.GPL. |
| * |
| * Contact Information: |
| * Intel Linux Wireless <ilw@linux.intel.com> |
| * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| * |
| * BSD LICENSE |
| * |
| * Copyright(c) 2005 - 2013 Intel Corporation. All rights reserved. |
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| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
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| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * distribution. |
| * * Neither the name Intel Corporation nor the names of its |
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| * from this software without specific prior written permission. |
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| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| *****************************************************************************/ |
| #ifndef __iwl_notif_wait_h__ |
| #define __iwl_notif_wait_h__ |
| |
| #include <linux/wait.h> |
| |
| #include "iwl-trans.h" |
| |
| struct iwl_notif_wait_data { |
| struct list_head notif_waits; |
| spinlock_t notif_wait_lock; |
| wait_queue_head_t notif_waitq; |
| }; |
| |
| #define MAX_NOTIF_CMDS 5 |
| |
| /** |
| * struct iwl_notification_wait - notification wait entry |
| * @list: list head for global list |
| * @fn: Function called with the notification. If the function |
| * returns true, the wait is over, if it returns false then |
| * the waiter stays blocked. If no function is given, any |
| * of the listed commands will unblock the waiter. |
| * @cmds: command IDs |
| * @n_cmds: number of command IDs |
| * @triggered: waiter should be woken up |
| * @aborted: wait was aborted |
| * |
| * This structure is not used directly, to wait for a |
| * notification declare it on the stack, and call |
| * iwlagn_init_notification_wait() with appropriate |
| * parameters. Then do whatever will cause the ucode |
| * to notify the driver, and to wait for that then |
| * call iwlagn_wait_notification(). |
| * |
| * Each notification is one-shot. If at some point we |
| * need to support multi-shot notifications (which |
| * can't be allocated on the stack) we need to modify |
| * the code for them. |
| */ |
| struct iwl_notification_wait { |
| struct list_head list; |
| |
| bool (*fn)(struct iwl_notif_wait_data *notif_data, |
| struct iwl_rx_packet *pkt, void *data); |
| void *fn_data; |
| |
| u8 cmds[MAX_NOTIF_CMDS]; |
| u8 n_cmds; |
| bool triggered, aborted; |
| }; |
| |
| |
| /* caller functions */ |
| void iwl_notification_wait_init(struct iwl_notif_wait_data *notif_data); |
| void iwl_notification_wait_notify(struct iwl_notif_wait_data *notif_data, |
| struct iwl_rx_packet *pkt); |
| void iwl_abort_notification_waits(struct iwl_notif_wait_data *notif_data); |
| |
| /* user functions */ |
| void __acquires(wait_entry) |
| iwl_init_notification_wait(struct iwl_notif_wait_data *notif_data, |
| struct iwl_notification_wait *wait_entry, |
| const u8 *cmds, int n_cmds, |
| bool (*fn)(struct iwl_notif_wait_data *notif_data, |
| struct iwl_rx_packet *pkt, void *data), |
| void *fn_data); |
| |
| int __must_check __releases(wait_entry) |
| iwl_wait_notification(struct iwl_notif_wait_data *notif_data, |
| struct iwl_notification_wait *wait_entry, |
| unsigned long timeout); |
| |
| void __releases(wait_entry) |
| iwl_remove_notification(struct iwl_notif_wait_data *notif_data, |
| struct iwl_notification_wait *wait_entry); |
| |
| #endif /* __iwl_notif_wait_h__ */ |
