cregit-Linux how code gets into the kernel

Release 4.11 drivers/net/wireless/intel/iwlwifi/iwl-notif-wait.h

/******************************************************************************
 *
 * 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 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2015 Intel Deutschland GmbH
 *
 * 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 COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <linuxwifi@intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
 * All rights reserved.
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 * modification, are permitted provided that the following conditions
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 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
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 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
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 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 *****************************************************************************/
#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;

	
u16 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 u16 *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__ */

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PersonTokensPropCommitsCommitProp
Johannes Berg20798.57%360.00%
Sara Sharon20.95%120.00%
Emmanuel Grumbach10.48%120.00%
Total210100.00%5100.00%
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