Commit 8b881c07 authored by Bjorn Andersson's avatar Bjorn Andersson
Browse files

rpmsg: Move helper for finding rpmsg devices to core 



Extract and move the helper function for finding rpmsg child devices to
the core.

Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
parent c9bd6f42

drivers/rpmsg/rpmsg_core.c

+33 −0
Original line number Diff line number Diff line
@@ -22,6 +22,8 @@ 
#include <linux/kernel.h>

#include <linux/rpmsg.h>



#include "rpmsg_internal.h"



/**

 * rpmsg_create_ept() - create a new rpmsg_endpoint

 * @rpdev: rpmsg channel device
@@ -229,3 +231,34 @@ int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst, 
	return ept->ops->trysend_offchannel(ept, src, dst, data, len);

}

EXPORT_SYMBOL(rpmsg_trysend_offchannel);



/*

 * match an rpmsg channel with a channel info struct.

 * this is used to make sure we're not creating rpmsg devices for channels

 * that already exist.

 */

static int rpmsg_device_match(struct device *dev, void *data)

{

	struct rpmsg_channel_info *chinfo = data;

	struct rpmsg_device *rpdev = to_rpmsg_device(dev);



	if (chinfo->src != RPMSG_ADDR_ANY && chinfo->src != rpdev->src)

		return 0;



	if (chinfo->dst != RPMSG_ADDR_ANY && chinfo->dst != rpdev->dst)

		return 0;



	if (strncmp(chinfo->name, rpdev->id.name, RPMSG_NAME_SIZE))

		return 0;



	/* found a match ! */

	return 1;

}



struct device *rpmsg_find_device(struct device *parent,

				 struct rpmsg_channel_info *chinfo)

{

	return device_find_child(parent, chinfo, rpmsg_device_match);



}

EXPORT_SYMBOL(rpmsg_find_device);

drivers/rpmsg/rpmsg_internal.h

0 → 100644
+31 −0
Original line number Diff line number Diff line 
/*

 * remote processor messaging bus internals

 *

 * Copyright (C) 2011 Texas Instruments, Inc.

 * Copyright (C) 2011 Google, Inc.

 *

 * Ohad Ben-Cohen <ohad@wizery.com>

 * Brian Swetland <swetland@google.com>

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

 * may be copied, distributed, and modified under those terms.

 *

 * 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.

 */



#ifndef __RPMSG_INTERNAL_H__

#define __RPMSG_INTERNAL_H__



#include <linux/rpmsg.h>



#define to_rpmsg_device(d) container_of(d, struct rpmsg_device, dev)

#define to_rpmsg_driver(d) container_of(d, struct rpmsg_driver, drv)



struct device *rpmsg_find_device(struct device *parent,

				 struct rpmsg_channel_info *chinfo);



#endif

drivers/rpmsg/virtio_rpmsg_bus.c

+4 −25
Original line number Diff line number Diff line
@@ -35,6 +35,8 @@ 
#include <linux/mutex.h>

#include <linux/of_device.h>



#include "rpmsg_internal.h"



/**

 * struct virtproc_info - virtual remote processor state

 * @vdev:	the virtio device
@@ -452,29 +454,6 @@ static void rpmsg_release_device(struct device *dev) 
	kfree(rpdev);

}



/*

 * match an rpmsg channel with a channel info struct.

 * this is used to make sure we're not creating rpmsg devices for channels

 * that already exist.

 */

static int rpmsg_device_match(struct device *dev, void *data)

{

	struct rpmsg_channel_info *chinfo = data;

	struct rpmsg_device *rpdev = to_rpmsg_device(dev);



	if (chinfo->src != RPMSG_ADDR_ANY && chinfo->src != rpdev->src)

		return 0;



	if (chinfo->dst != RPMSG_ADDR_ANY && chinfo->dst != rpdev->dst)

		return 0;



	if (strncmp(chinfo->name, rpdev->id.name, RPMSG_NAME_SIZE))

		return 0;



	/* found a match ! */

	return 1;

}



static const struct rpmsg_device_ops virtio_rpmsg_ops = {

	.create_ept = virtio_rpmsg_create_ept,

	.announce_create = virtio_rpmsg_announce_create,
@@ -494,7 +473,7 @@ static struct rpmsg_device *rpmsg_create_channel(struct virtproc_info *vrp, 
	int ret;



	/* make sure a similar channel doesn't already exist */

	tmp = device_find_child(dev, chinfo, rpmsg_device_match);

	tmp = rpmsg_find_device(dev, chinfo);

	if (tmp) {

		/* decrement the matched device's refcount back */

		put_device(tmp);
@@ -547,7 +526,7 @@ static int rpmsg_destroy_channel(struct virtproc_info *vrp, 
	struct virtio_device *vdev = vrp->vdev;

	struct device *dev;



	dev = device_find_child(&vdev->dev, chinfo, rpmsg_device_match);

	dev = rpmsg_find_device(&vdev->dev, chinfo);

	if (!dev)

		return -EINVAL;