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Commit cf6a1215 authored by Vignesh Kulothungan's avatar Vignesh Kulothungan Committed by Gerrit - the friendly Code Review server
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dsp: add support to send uevents 



Add a common function handle to send uevents from q6 layer.
Add functions to initialize and cleanup the kernel object required
to send uevents.

CRs-Fixed: 2211324
Change-Id: I9dceb4eb16d6941600455602f78f4f1498171d19
Signed-off-by: default avatarVignesh Kulothungan <vigneshk@codeaurora.org>
parent 9ca8dc32

dsp/q6core.c

+104 −0
Original line number Diff line number Diff line
@@ -18,6 +18,8 @@ 
#include <linux/mutex.h>

#include <linux/sched.h>

#include <linux/slab.h>

#include <linux/sysfs.h>

#include <linux/kobject.h>

#include <dsp/q6core.h>

#include <dsp/audio_cal_utils.h>

#include <dsp/apr_audio-v2.h>
@@ -82,6 +84,106 @@ struct generic_get_data_ { 
};

static struct generic_get_data_ *generic_get_data;



static DEFINE_MUTEX(kset_lock);

static struct kset *audio_uevent_kset;



static int q6core_init_uevent_kset(void)

{

	int ret = 0;



	mutex_lock(&kset_lock);

	if (audio_uevent_kset)

		goto done;



	/* Create a kset under /sys/kernel/ */

	audio_uevent_kset = kset_create_and_add("q6audio", NULL, kernel_kobj);

	if (!audio_uevent_kset) {

		pr_err("%s: error creating uevent kernel set", __func__);

		ret = -EINVAL;

	}

done:

	mutex_unlock(&kset_lock);

	return ret;

}



static void q6core_destroy_uevent_kset(void)

{

	if (audio_uevent_kset) {

		kset_unregister(audio_uevent_kset);

		audio_uevent_kset = NULL;

	}

}



/**

 * q6core_init_uevent_data - initialize kernel object required to send uevents.

 *

 * @uevent_data: uevent data (dynamically allocated memory).

 * @name: name of the kernel object.

 *

 * Returns 0 on success or error otherwise.

 */

int q6core_init_uevent_data(struct audio_uevent_data *uevent_data, char *name)

{

	int ret = -EINVAL;



	if (!uevent_data || !name)

		return ret;



	ret = q6core_init_uevent_kset();

	if (ret)

		return ret;



	/* Set kset for kobject before initializing the kobject */

	uevent_data->kobj.kset = audio_uevent_kset;



	/* Initialize kobject and add it to kernel */

	ret = kobject_init_and_add(&uevent_data->kobj, &uevent_data->ktype,

					NULL, "%s", name);

	if (ret) {

		pr_err("%s: error initializing uevent kernel object: %d",

			__func__, ret);

		kobject_put(&uevent_data->kobj);

		return ret;

	}



	/* Send kobject add event to the system */

	kobject_uevent(&uevent_data->kobj, KOBJ_ADD);



	return ret;

}

EXPORT_SYMBOL(q6core_init_uevent_data);



/**

 * q6core_destroy_uevent_data - destroy kernel object.

 *

 * @uevent_data: uevent data.

 */

void q6core_destroy_uevent_data(struct audio_uevent_data *uevent_data)

{

	if (uevent_data)

		kobject_put(&uevent_data->kobj);

}

EXPORT_SYMBOL(q6core_destroy_uevent_data);



/**

 * q6core_send_uevent - send uevent to userspace.

 *

 * @uevent_data: uevent data.

 * @event: event to send.

 *

 * Returns 0 on success or error otherwise.

 */

int q6core_send_uevent(struct audio_uevent_data *uevent_data, char *event)

{

	char *env[] = { event, NULL };



	if (!event || !uevent_data)

		return -EINVAL;



	return kobject_uevent_env(&uevent_data->kobj, KOBJ_CHANGE, env);

}

EXPORT_SYMBOL(q6core_send_uevent);



static int parse_fwk_version_info(uint32_t *payload)

{

	size_t ver_size;
@@ -1110,6 +1212,7 @@ int __init core_init(void) 
	mutex_init(&q6core_lcl.ver_lock);



	q6core_init_cal_data();

	q6core_init_uevent_kset();



	return 0;

}
@@ -1119,6 +1222,7 @@ void core_exit(void) 
	mutex_destroy(&q6core_lcl.cmd_lock);

	mutex_destroy(&q6core_lcl.ver_lock);

	q6core_delete_cal_data();

	q6core_destroy_uevent_kset();

}

MODULE_DESCRIPTION("ADSP core driver");

MODULE_LICENSE("GPL v2");

include/dsp/q6core.h

+10 −1
Original line number Diff line number Diff line 
/* Copyright (c) 2012-2017, The Linux Foundation. All rights reserved.

/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -27,6 +27,15 @@ int q6core_get_service_version(uint32_t service_id, 
			       size_t size);

size_t q6core_get_fwk_version_size(uint32_t service_id);



struct audio_uevent_data {

	struct kobject kobj;

	struct kobj_type ktype;

};



int q6core_init_uevent_data(struct audio_uevent_data *uevent_data, char *name);

void q6core_destroy_uevent_data(struct audio_uevent_data *uevent_data);

int q6core_send_uevent(struct audio_uevent_data *uevent_data, char *name);



#define ADSP_CMD_SET_DTS_EAGLE_DATA_ID 0x00012919

#define DTS_EAGLE_LICENSE_ID           0x00028346

struct adsp_dts_eagle {