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qca-wifi: Add QAL API for Linux notifier registration

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Add QAL API to register/unregister to the Linux
kernel panic notifier chain.

Change-Id: Ie45ca7eea3efd80c62a7de066e2cf184f1606cb0
CRs-Fixed: 2408487
This commit is contained in:
Vivek
2019-03-14 19:17:56 +05:30
parent 37fbf98811
commit 9d38faa62a
2 changed files with 111 additions and 0 deletions
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50
qal/inc/qal_notifier.h Normal file
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/*
* Copyright (c) 2019 The Linux Foundation. All rights reserved.
*
* Permission to use, copy, modify, and/or distribute this software for
* any purpose with or without fee is hereby granted, provided that the
* above copyright notice and this permission notice appear in all
* copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/**
* DOC: qal_notifier (QAL notifier)
* QCA driver framework for OS notifier handlers
*/
#ifndef __QAL_NOTIFIER_H
#define __QAL_NOTIFIER_H
#include "qdf_types.h"
typedef QDF_STATUS (*qal_panic_notifier)(void *data);
/**
*
* qal_register_panic_notifier() - register to panic notifier chain
*
* To be called once, globally.
*
* Return: None
*/
QDF_STATUS qal_register_panic_notifier(qal_panic_notifier cb);
/**
* qal_unregister_panic_notifier() - unregister linux panic notifier chain
*
* To be called once, globally.
*
* Return: None
*/
QDF_STATUS qal_unregister_panic_notifier(void);
#endif /* __QAL_NOTIFIER_H */

61
qal/linux/src/qal_notifier.c Normal file
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/*
* Copyright (c) 2019 The Linux Foundation. All rights reserved.
*
* Permission to use, copy, modify, and/or distribute this software for
* any purpose with or without fee is hereby granted, provided that the
* above copyright notice and this permission notice appear in all
* copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "qal_notifier.h"
#include "qdf_module.h"
#include "qdf_trace.h"
static struct notifier_block qal_panic_nb;
static qal_panic_notifier qal_panic_cb;
static int qal_panic_notifier_handler(struct notifier_block *nb,
unsigned long action, void *data)
{
qal_panic_cb(data);
return QDF_STATUS_SUCCESS;
}
QDF_STATUS qal_register_panic_notifier(qal_panic_notifier cb)
{
QDF_ASSERT(!qal_panic_cb);
if (qal_panic_cb) {
qdf_err("Panic notifier already registered");
return QDF_STATUS_E_FAILURE;
}
qal_panic_cb = cb;
qal_panic_nb.notifier_call = qal_panic_notifier_handler;
atomic_notifier_chain_register(&panic_notifier_list,
&qal_panic_nb);
return QDF_STATUS_SUCCESS;
}
qdf_export_symbol(qal_register_panic_notifier);
QDF_STATUS qal_unregister_panic_notifier(void)
{
atomic_notifier_chain_unregister(&panic_notifier_list,
&qal_panic_nb);
return QDF_STATUS_SUCCESS;
}
qdf_export_symbol(qal_unregister_panic_notifier);