diff mbox series

[v2,1/7] rpmsg: char: Export eptdev create an destroy functions

Message ID 20210413134458.17912-2-arnaud.pouliquen@foss.st.com (mailing list archive)
State Superseded
Headers show
Series Restructure the rpmsg char and introduce the rpmsg-raw channel | expand

Commit Message

Arnaud Pouliquen April 13, 2021, 1:44 p.m. UTC
To prepare the split of the code related to the control (ctrldev)
and the endpoint (eptdev) devices in 2 separate files:

- Rename and export the functions in rpmsg_char.h.

- Suppress the dependency with the rpmsg_ctrldev struct in the
  rpmsg_chrdev_create_eptdev function.

- The rpmsg class is provided as parameter in rpmsg_chrdev_create_eptdev,
  because the class is associated to the control part.

Suggested-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
---
 drivers/rpmsg/rpmsg_char.c | 19 +++++++++------
 drivers/rpmsg/rpmsg_char.h | 50 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 61 insertions(+), 8 deletions(-)
 create mode 100644 drivers/rpmsg/rpmsg_char.h

Comments

Mathieu Poirier April 21, 2021, 5:52 p.m. UTC | #1
On Tue, Apr 13, 2021 at 03:44:52PM +0200, Arnaud Pouliquen wrote:
> To prepare the split of the code related to the control (ctrldev)
> and the endpoint (eptdev) devices in 2 separate files:
> 
> - Rename and export the functions in rpmsg_char.h.
> 
> - Suppress the dependency with the rpmsg_ctrldev struct in the
>   rpmsg_chrdev_create_eptdev function.
> 
> - The rpmsg class is provided as parameter in rpmsg_chrdev_create_eptdev,
>   because the class is associated to the control part.
> 
> Suggested-by: Mathieu Poirier <mathieu.poirier@linaro.org>
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
> ---
>  drivers/rpmsg/rpmsg_char.c | 19 +++++++++------
>  drivers/rpmsg/rpmsg_char.h | 50 ++++++++++++++++++++++++++++++++++++++
>  2 files changed, 61 insertions(+), 8 deletions(-)
>  create mode 100644 drivers/rpmsg/rpmsg_char.h
> 
> diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c
> index 2bebc9b2d163..b9df8dc4365f 100644
> --- a/drivers/rpmsg/rpmsg_char.c
> +++ b/drivers/rpmsg/rpmsg_char.c
> @@ -1,5 +1,6 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /*
> + * Copyright (C) 2021, STMicroelectronics
>   * Copyright (c) 2016, Linaro Ltd.
>   * Copyright (c) 2012, Michal Simek <monstr@monstr.eu>
>   * Copyright (c) 2012, PetaLogix
> @@ -22,6 +23,7 @@
>  #include <linux/uaccess.h>
>  #include <uapi/linux/rpmsg.h>
>  
> +#include "rpmsg_char.h"
>  #include "rpmsg_internal.h"
>  
>  #define RPMSG_DEV_MAX	(MINORMASK + 1)
> @@ -78,7 +80,7 @@ struct rpmsg_eptdev {
>  	wait_queue_head_t readq;
>  };
>  
> -static int rpmsg_eptdev_destroy(struct device *dev, void *data)
> +int rpmsg_chrdev_destroy_eptdev(struct device *dev, void *data)

Shouldn't this be rpmsg_chrdev_eptdev_destroy()?  I've been wondering about the
flipping of destroy and eptdev...  The same for rpmsg_chrdev_create_eptdev().

With that:

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>

>  {
>  	struct rpmsg_eptdev *eptdev = dev_to_eptdev(dev);
>  
> @@ -97,6 +99,7 @@ static int rpmsg_eptdev_destroy(struct device *dev, void *data)
>  
>  	return 0;
>  }
> +EXPORT_SYMBOL(rpmsg_chrdev_destroy_eptdev);
>  
>  static int rpmsg_ept_cb(struct rpmsg_device *rpdev, void *buf, int len,
>  			void *priv, u32 addr)
> @@ -280,7 +283,7 @@ static long rpmsg_eptdev_ioctl(struct file *fp, unsigned int cmd,
>  	if (cmd != RPMSG_DESTROY_EPT_IOCTL)
>  		return -EINVAL;
>  
> -	return rpmsg_eptdev_destroy(&eptdev->dev, NULL);
> +	return rpmsg_chrdev_destroy_eptdev(&eptdev->dev, NULL);
>  }
>  
>  static const struct file_operations rpmsg_eptdev_fops = {
> @@ -339,10 +342,9 @@ static void rpmsg_eptdev_release_device(struct device *dev)
>  	kfree(eptdev);
>  }
>  
> -static int rpmsg_eptdev_create(struct rpmsg_ctrldev *ctrldev,
> -			       struct rpmsg_channel_info chinfo)
> +int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent,
> +			       struct rpmsg_channel_info chinfo, struct class *rpmsg_class)
>  {
> -	struct rpmsg_device *rpdev = ctrldev->rpdev;
>  	struct rpmsg_eptdev *eptdev;
>  	struct device *dev;
>  	int ret;
> @@ -362,7 +364,7 @@ static int rpmsg_eptdev_create(struct rpmsg_ctrldev *ctrldev,
>  
>  	device_initialize(dev);
>  	dev->class = rpmsg_class;
> -	dev->parent = &ctrldev->dev;
> +	dev->parent = parent;
>  	dev->groups = rpmsg_eptdev_groups;
>  	dev_set_drvdata(dev, eptdev);
>  
> @@ -405,6 +407,7 @@ static int rpmsg_eptdev_create(struct rpmsg_ctrldev *ctrldev,
>  
>  	return ret;
>  }
> +EXPORT_SYMBOL(rpmsg_chrdev_create_eptdev);
>  
>  static int rpmsg_ctrldev_open(struct inode *inode, struct file *filp)
>  {
> @@ -444,7 +447,7 @@ static long rpmsg_ctrldev_ioctl(struct file *fp, unsigned int cmd,
>  	chinfo.src = eptinfo.src;
>  	chinfo.dst = eptinfo.dst;
>  
> -	return rpmsg_eptdev_create(ctrldev, chinfo);
> +	return rpmsg_chrdev_create_eptdev(ctrldev->rpdev, &ctrldev->dev, chinfo, rpmsg_class);
>  };
>  
>  static const struct file_operations rpmsg_ctrldev_fops = {
> @@ -530,7 +533,7 @@ static void rpmsg_chrdev_remove(struct rpmsg_device *rpdev)
>  	int ret;
>  
>  	/* Destroy all endpoints */
> -	ret = device_for_each_child(&ctrldev->dev, NULL, rpmsg_eptdev_destroy);
> +	ret = device_for_each_child(&ctrldev->dev, NULL, rpmsg_chrdev_destroy_eptdev);
>  	if (ret)
>  		dev_warn(&rpdev->dev, "failed to nuke endpoints: %d\n", ret);
>  
> diff --git a/drivers/rpmsg/rpmsg_char.h b/drivers/rpmsg/rpmsg_char.h
> new file mode 100644
> index 000000000000..379d2ae2bee8
> --- /dev/null
> +++ b/drivers/rpmsg/rpmsg_char.h
> @@ -0,0 +1,50 @@
> +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
> +/*
> + * Copyright (C) STMicroelectronics 2021.
> + */
> +
> +#ifndef __RPMSG_CHRDEV_H__
> +#define __RPMSG_CHRDEV_H__
> +
> +#if IS_REACHABLE(CONFIG_RPMSG_CHAR)
> +/**
> + * rpmsg_chrdev_create_eptdev() - register char device based on an endpoint
> + * @rpdev:  prepared rpdev to be used for creating endpoints
> + * @parent: parent device
> + * @chinfo: assiated endpoint channel information.
> + *
> + * This function create a new rpmsg char endpoint device to instantiate a new
> + * endpoint based on chinfo information.
> + */
> +int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent,
> +			       struct rpmsg_channel_info chinfo, struct class *rpmsg_class);
> +
> +/**
> + * rpmsg_chrdev_destroy_eptdev() - destroy created char device endpoint.
> + * @data: private data associated to the endpoint device
> + *
> + * This function destroys a rpmsg char endpoint device created by the RPMSG_DESTROY_EPT_IOCTL
> + * control.
> + */
> +int rpmsg_chrdev_destroy_eptdev(struct device *dev, void *data);
> +
> +#else  /*IS_REACHABLE(CONFIG_RPMSG_CHAR) */
> +
> +static inline int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent,
> +					     struct rpmsg_channel_info chinfo,
> +					     struct class *rpmsg_class)
> +{
> +	return -EINVAL;
> +}
> +
> +static inline int rpmsg_chrdev_destroy_eptdev(struct device *dev, void *data)
> +{
> +	/* This shouldn't be possible */
> +	WARN_ON(1);
> +
> +	return 0;
> +}
> +
> +#endif /*IS_REACHABLE(CONFIG_RPMSG_CHAR) */
> +
> +#endif /*__RPMSG_CHRDEV_H__ */
> -- 
> 2.17.1
>
Arnaud Pouliquen April 22, 2021, 7:55 a.m. UTC | #2
hello Mathieu

On 4/21/21 7:52 PM, Mathieu Poirier wrote:
> On Tue, Apr 13, 2021 at 03:44:52PM +0200, Arnaud Pouliquen wrote:
>> To prepare the split of the code related to the control (ctrldev)
>> and the endpoint (eptdev) devices in 2 separate files:
>>
>> - Rename and export the functions in rpmsg_char.h.
>>
>> - Suppress the dependency with the rpmsg_ctrldev struct in the
>>   rpmsg_chrdev_create_eptdev function.
>>
>> - The rpmsg class is provided as parameter in rpmsg_chrdev_create_eptdev,
>>   because the class is associated to the control part.
>>
>> Suggested-by: Mathieu Poirier <mathieu.poirier@linaro.org>
>> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
>> ---
>>  drivers/rpmsg/rpmsg_char.c | 19 +++++++++------
>>  drivers/rpmsg/rpmsg_char.h | 50 ++++++++++++++++++++++++++++++++++++++
>>  2 files changed, 61 insertions(+), 8 deletions(-)
>>  create mode 100644 drivers/rpmsg/rpmsg_char.h
>>
>> diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c
>> index 2bebc9b2d163..b9df8dc4365f 100644
>> --- a/drivers/rpmsg/rpmsg_char.c
>> +++ b/drivers/rpmsg/rpmsg_char.c
>> @@ -1,5 +1,6 @@
>>  // SPDX-License-Identifier: GPL-2.0
>>  /*
>> + * Copyright (C) 2021, STMicroelectronics
>>   * Copyright (c) 2016, Linaro Ltd.
>>   * Copyright (c) 2012, Michal Simek <monstr@monstr.eu>
>>   * Copyright (c) 2012, PetaLogix
>> @@ -22,6 +23,7 @@
>>  #include <linux/uaccess.h>
>>  #include <uapi/linux/rpmsg.h>
>>  
>> +#include "rpmsg_char.h"
>>  #include "rpmsg_internal.h"
>>  
>>  #define RPMSG_DEV_MAX	(MINORMASK + 1)
>> @@ -78,7 +80,7 @@ struct rpmsg_eptdev {
>>  	wait_queue_head_t readq;
>>  };
>>  
>> -static int rpmsg_eptdev_destroy(struct device *dev, void *data)
>> +int rpmsg_chrdev_destroy_eptdev(struct device *dev, void *data)
> 
> Shouldn't this be rpmsg_chrdev_eptdev_destroy()?  I've been wondering about the
> flipping of destroy and eptdev...  The same for rpmsg_chrdev_create_eptdev().

As the function is exported i prefered to follow name srtructure that is
commonly used: <module>_<action>_<object>

But it is not a rule, so please just tell me if you prefer that i rename the
functions  rpmsg_chrdev_eptdev_xxxx?

Thanks,
Arnaud

> 
> With that:
> 
> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
> 
>>  {
>>  	struct rpmsg_eptdev *eptdev = dev_to_eptdev(dev);
>>  
>> @@ -97,6 +99,7 @@ static int rpmsg_eptdev_destroy(struct device *dev, void *data)
>>  
>>  	return 0;
>>  }
>> +EXPORT_SYMBOL(rpmsg_chrdev_destroy_eptdev);
>>  
>>  static int rpmsg_ept_cb(struct rpmsg_device *rpdev, void *buf, int len,
>>  			void *priv, u32 addr)
>> @@ -280,7 +283,7 @@ static long rpmsg_eptdev_ioctl(struct file *fp, unsigned int cmd,
>>  	if (cmd != RPMSG_DESTROY_EPT_IOCTL)
>>  		return -EINVAL;
>>  
>> -	return rpmsg_eptdev_destroy(&eptdev->dev, NULL);
>> +	return rpmsg_chrdev_destroy_eptdev(&eptdev->dev, NULL);
>>  }
>>  
>>  static const struct file_operations rpmsg_eptdev_fops = {
>> @@ -339,10 +342,9 @@ static void rpmsg_eptdev_release_device(struct device *dev)
>>  	kfree(eptdev);
>>  }
>>  
>> -static int rpmsg_eptdev_create(struct rpmsg_ctrldev *ctrldev,
>> -			       struct rpmsg_channel_info chinfo)
>> +int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent,
>> +			       struct rpmsg_channel_info chinfo, struct class *rpmsg_class)
>>  {
>> -	struct rpmsg_device *rpdev = ctrldev->rpdev;
>>  	struct rpmsg_eptdev *eptdev;
>>  	struct device *dev;
>>  	int ret;
>> @@ -362,7 +364,7 @@ static int rpmsg_eptdev_create(struct rpmsg_ctrldev *ctrldev,
>>  
>>  	device_initialize(dev);
>>  	dev->class = rpmsg_class;
>> -	dev->parent = &ctrldev->dev;
>> +	dev->parent = parent;
>>  	dev->groups = rpmsg_eptdev_groups;
>>  	dev_set_drvdata(dev, eptdev);
>>  
>> @@ -405,6 +407,7 @@ static int rpmsg_eptdev_create(struct rpmsg_ctrldev *ctrldev,
>>  
>>  	return ret;
>>  }
>> +EXPORT_SYMBOL(rpmsg_chrdev_create_eptdev);
>>  
>>  static int rpmsg_ctrldev_open(struct inode *inode, struct file *filp)
>>  {
>> @@ -444,7 +447,7 @@ static long rpmsg_ctrldev_ioctl(struct file *fp, unsigned int cmd,
>>  	chinfo.src = eptinfo.src;
>>  	chinfo.dst = eptinfo.dst;
>>  
>> -	return rpmsg_eptdev_create(ctrldev, chinfo);
>> +	return rpmsg_chrdev_create_eptdev(ctrldev->rpdev, &ctrldev->dev, chinfo, rpmsg_class);
>>  };
>>  
>>  static const struct file_operations rpmsg_ctrldev_fops = {
>> @@ -530,7 +533,7 @@ static void rpmsg_chrdev_remove(struct rpmsg_device *rpdev)
>>  	int ret;
>>  
>>  	/* Destroy all endpoints */
>> -	ret = device_for_each_child(&ctrldev->dev, NULL, rpmsg_eptdev_destroy);
>> +	ret = device_for_each_child(&ctrldev->dev, NULL, rpmsg_chrdev_destroy_eptdev);
>>  	if (ret)
>>  		dev_warn(&rpdev->dev, "failed to nuke endpoints: %d\n", ret);
>>  
>> diff --git a/drivers/rpmsg/rpmsg_char.h b/drivers/rpmsg/rpmsg_char.h
>> new file mode 100644
>> index 000000000000..379d2ae2bee8
>> --- /dev/null
>> +++ b/drivers/rpmsg/rpmsg_char.h
>> @@ -0,0 +1,50 @@
>> +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
>> +/*
>> + * Copyright (C) STMicroelectronics 2021.
>> + */
>> +
>> +#ifndef __RPMSG_CHRDEV_H__
>> +#define __RPMSG_CHRDEV_H__
>> +
>> +#if IS_REACHABLE(CONFIG_RPMSG_CHAR)
>> +/**
>> + * rpmsg_chrdev_create_eptdev() - register char device based on an endpoint
>> + * @rpdev:  prepared rpdev to be used for creating endpoints
>> + * @parent: parent device
>> + * @chinfo: assiated endpoint channel information.
>> + *
>> + * This function create a new rpmsg char endpoint device to instantiate a new
>> + * endpoint based on chinfo information.
>> + */
>> +int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent,
>> +			       struct rpmsg_channel_info chinfo, struct class *rpmsg_class);
>> +
>> +/**
>> + * rpmsg_chrdev_destroy_eptdev() - destroy created char device endpoint.
>> + * @data: private data associated to the endpoint device
>> + *
>> + * This function destroys a rpmsg char endpoint device created by the RPMSG_DESTROY_EPT_IOCTL
>> + * control.
>> + */
>> +int rpmsg_chrdev_destroy_eptdev(struct device *dev, void *data);
>> +
>> +#else  /*IS_REACHABLE(CONFIG_RPMSG_CHAR) */
>> +
>> +static inline int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent,
>> +					     struct rpmsg_channel_info chinfo,
>> +					     struct class *rpmsg_class)
>> +{
>> +	return -EINVAL;
>> +}
>> +
>> +static inline int rpmsg_chrdev_destroy_eptdev(struct device *dev, void *data)
>> +{
>> +	/* This shouldn't be possible */
>> +	WARN_ON(1);
>> +
>> +	return 0;
>> +}
>> +
>> +#endif /*IS_REACHABLE(CONFIG_RPMSG_CHAR) */
>> +
>> +#endif /*__RPMSG_CHRDEV_H__ */
>> -- 
>> 2.17.1
>>
Mathieu Poirier April 22, 2021, 4:29 p.m. UTC | #3
On Thu, Apr 22, 2021 at 09:55:47AM +0200, Arnaud POULIQUEN wrote:
> hello Mathieu
> 
> On 4/21/21 7:52 PM, Mathieu Poirier wrote:
> > On Tue, Apr 13, 2021 at 03:44:52PM +0200, Arnaud Pouliquen wrote:
> >> To prepare the split of the code related to the control (ctrldev)
> >> and the endpoint (eptdev) devices in 2 separate files:
> >>
> >> - Rename and export the functions in rpmsg_char.h.
> >>
> >> - Suppress the dependency with the rpmsg_ctrldev struct in the
> >>   rpmsg_chrdev_create_eptdev function.
> >>
> >> - The rpmsg class is provided as parameter in rpmsg_chrdev_create_eptdev,
> >>   because the class is associated to the control part.
> >>
> >> Suggested-by: Mathieu Poirier <mathieu.poirier@linaro.org>
> >> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
> >> ---
> >>  drivers/rpmsg/rpmsg_char.c | 19 +++++++++------
> >>  drivers/rpmsg/rpmsg_char.h | 50 ++++++++++++++++++++++++++++++++++++++
> >>  2 files changed, 61 insertions(+), 8 deletions(-)
> >>  create mode 100644 drivers/rpmsg/rpmsg_char.h
> >>
> >> diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c
> >> index 2bebc9b2d163..b9df8dc4365f 100644
> >> --- a/drivers/rpmsg/rpmsg_char.c
> >> +++ b/drivers/rpmsg/rpmsg_char.c
> >> @@ -1,5 +1,6 @@
> >>  // SPDX-License-Identifier: GPL-2.0
> >>  /*
> >> + * Copyright (C) 2021, STMicroelectronics
> >>   * Copyright (c) 2016, Linaro Ltd.
> >>   * Copyright (c) 2012, Michal Simek <monstr@monstr.eu>
> >>   * Copyright (c) 2012, PetaLogix
> >> @@ -22,6 +23,7 @@
> >>  #include <linux/uaccess.h>
> >>  #include <uapi/linux/rpmsg.h>
> >>  
> >> +#include "rpmsg_char.h"
> >>  #include "rpmsg_internal.h"
> >>  
> >>  #define RPMSG_DEV_MAX	(MINORMASK + 1)
> >> @@ -78,7 +80,7 @@ struct rpmsg_eptdev {
> >>  	wait_queue_head_t readq;
> >>  };
> >>  
> >> -static int rpmsg_eptdev_destroy(struct device *dev, void *data)
> >> +int rpmsg_chrdev_destroy_eptdev(struct device *dev, void *data)
> > 
> > Shouldn't this be rpmsg_chrdev_eptdev_destroy()?  I've been wondering about the
> > flipping of destroy and eptdev...  The same for rpmsg_chrdev_create_eptdev().
> 
> As the function is exported i prefered to follow name srtructure that is
> commonly used: <module>_<action>_<object>
> 
> But it is not a rule, so please just tell me if you prefer that i rename the
> functions  rpmsg_chrdev_eptdev_xxxx?

I'd prefer rpmsg_chrdev_eptdev_create/destroy() since we are already familiar
with that terminology.

> 
> Thanks,
> Arnaud
> 
> > 
> > With that:
> > 
> > Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
> > 
> >>  {
> >>  	struct rpmsg_eptdev *eptdev = dev_to_eptdev(dev);
> >>  
> >> @@ -97,6 +99,7 @@ static int rpmsg_eptdev_destroy(struct device *dev, void *data)
> >>  
> >>  	return 0;
> >>  }
> >> +EXPORT_SYMBOL(rpmsg_chrdev_destroy_eptdev);
> >>  
> >>  static int rpmsg_ept_cb(struct rpmsg_device *rpdev, void *buf, int len,
> >>  			void *priv, u32 addr)
> >> @@ -280,7 +283,7 @@ static long rpmsg_eptdev_ioctl(struct file *fp, unsigned int cmd,
> >>  	if (cmd != RPMSG_DESTROY_EPT_IOCTL)
> >>  		return -EINVAL;
> >>  
> >> -	return rpmsg_eptdev_destroy(&eptdev->dev, NULL);
> >> +	return rpmsg_chrdev_destroy_eptdev(&eptdev->dev, NULL);
> >>  }
> >>  
> >>  static const struct file_operations rpmsg_eptdev_fops = {
> >> @@ -339,10 +342,9 @@ static void rpmsg_eptdev_release_device(struct device *dev)
> >>  	kfree(eptdev);
> >>  }
> >>  
> >> -static int rpmsg_eptdev_create(struct rpmsg_ctrldev *ctrldev,
> >> -			       struct rpmsg_channel_info chinfo)
> >> +int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent,
> >> +			       struct rpmsg_channel_info chinfo, struct class *rpmsg_class)
> >>  {
> >> -	struct rpmsg_device *rpdev = ctrldev->rpdev;
> >>  	struct rpmsg_eptdev *eptdev;
> >>  	struct device *dev;
> >>  	int ret;
> >> @@ -362,7 +364,7 @@ static int rpmsg_eptdev_create(struct rpmsg_ctrldev *ctrldev,
> >>  
> >>  	device_initialize(dev);
> >>  	dev->class = rpmsg_class;
> >> -	dev->parent = &ctrldev->dev;
> >> +	dev->parent = parent;
> >>  	dev->groups = rpmsg_eptdev_groups;
> >>  	dev_set_drvdata(dev, eptdev);
> >>  
> >> @@ -405,6 +407,7 @@ static int rpmsg_eptdev_create(struct rpmsg_ctrldev *ctrldev,
> >>  
> >>  	return ret;
> >>  }
> >> +EXPORT_SYMBOL(rpmsg_chrdev_create_eptdev);
> >>  
> >>  static int rpmsg_ctrldev_open(struct inode *inode, struct file *filp)
> >>  {
> >> @@ -444,7 +447,7 @@ static long rpmsg_ctrldev_ioctl(struct file *fp, unsigned int cmd,
> >>  	chinfo.src = eptinfo.src;
> >>  	chinfo.dst = eptinfo.dst;
> >>  
> >> -	return rpmsg_eptdev_create(ctrldev, chinfo);
> >> +	return rpmsg_chrdev_create_eptdev(ctrldev->rpdev, &ctrldev->dev, chinfo, rpmsg_class);
> >>  };
> >>  
> >>  static const struct file_operations rpmsg_ctrldev_fops = {
> >> @@ -530,7 +533,7 @@ static void rpmsg_chrdev_remove(struct rpmsg_device *rpdev)
> >>  	int ret;
> >>  
> >>  	/* Destroy all endpoints */
> >> -	ret = device_for_each_child(&ctrldev->dev, NULL, rpmsg_eptdev_destroy);
> >> +	ret = device_for_each_child(&ctrldev->dev, NULL, rpmsg_chrdev_destroy_eptdev);
> >>  	if (ret)
> >>  		dev_warn(&rpdev->dev, "failed to nuke endpoints: %d\n", ret);
> >>  
> >> diff --git a/drivers/rpmsg/rpmsg_char.h b/drivers/rpmsg/rpmsg_char.h
> >> new file mode 100644
> >> index 000000000000..379d2ae2bee8
> >> --- /dev/null
> >> +++ b/drivers/rpmsg/rpmsg_char.h
> >> @@ -0,0 +1,50 @@
> >> +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
> >> +/*
> >> + * Copyright (C) STMicroelectronics 2021.
> >> + */
> >> +
> >> +#ifndef __RPMSG_CHRDEV_H__
> >> +#define __RPMSG_CHRDEV_H__
> >> +
> >> +#if IS_REACHABLE(CONFIG_RPMSG_CHAR)
> >> +/**
> >> + * rpmsg_chrdev_create_eptdev() - register char device based on an endpoint
> >> + * @rpdev:  prepared rpdev to be used for creating endpoints
> >> + * @parent: parent device
> >> + * @chinfo: assiated endpoint channel information.
> >> + *
> >> + * This function create a new rpmsg char endpoint device to instantiate a new
> >> + * endpoint based on chinfo information.
> >> + */
> >> +int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent,
> >> +			       struct rpmsg_channel_info chinfo, struct class *rpmsg_class);
> >> +
> >> +/**
> >> + * rpmsg_chrdev_destroy_eptdev() - destroy created char device endpoint.
> >> + * @data: private data associated to the endpoint device
> >> + *
> >> + * This function destroys a rpmsg char endpoint device created by the RPMSG_DESTROY_EPT_IOCTL
> >> + * control.
> >> + */
> >> +int rpmsg_chrdev_destroy_eptdev(struct device *dev, void *data);
> >> +
> >> +#else  /*IS_REACHABLE(CONFIG_RPMSG_CHAR) */
> >> +
> >> +static inline int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent,
> >> +					     struct rpmsg_channel_info chinfo,
> >> +					     struct class *rpmsg_class)
> >> +{
> >> +	return -EINVAL;
> >> +}
> >> +
> >> +static inline int rpmsg_chrdev_destroy_eptdev(struct device *dev, void *data)
> >> +{
> >> +	/* This shouldn't be possible */
> >> +	WARN_ON(1);
> >> +
> >> +	return 0;
> >> +}
> >> +
> >> +#endif /*IS_REACHABLE(CONFIG_RPMSG_CHAR) */
> >> +
> >> +#endif /*__RPMSG_CHRDEV_H__ */
> >> -- 
> >> 2.17.1
> >>
diff mbox series

Patch

diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c
index 2bebc9b2d163..b9df8dc4365f 100644
--- a/drivers/rpmsg/rpmsg_char.c
+++ b/drivers/rpmsg/rpmsg_char.c
@@ -1,5 +1,6 @@ 
 // SPDX-License-Identifier: GPL-2.0
 /*
+ * Copyright (C) 2021, STMicroelectronics
  * Copyright (c) 2016, Linaro Ltd.
  * Copyright (c) 2012, Michal Simek <monstr@monstr.eu>
  * Copyright (c) 2012, PetaLogix
@@ -22,6 +23,7 @@ 
 #include <linux/uaccess.h>
 #include <uapi/linux/rpmsg.h>
 
+#include "rpmsg_char.h"
 #include "rpmsg_internal.h"
 
 #define RPMSG_DEV_MAX	(MINORMASK + 1)
@@ -78,7 +80,7 @@  struct rpmsg_eptdev {
 	wait_queue_head_t readq;
 };
 
-static int rpmsg_eptdev_destroy(struct device *dev, void *data)
+int rpmsg_chrdev_destroy_eptdev(struct device *dev, void *data)
 {
 	struct rpmsg_eptdev *eptdev = dev_to_eptdev(dev);
 
@@ -97,6 +99,7 @@  static int rpmsg_eptdev_destroy(struct device *dev, void *data)
 
 	return 0;
 }
+EXPORT_SYMBOL(rpmsg_chrdev_destroy_eptdev);
 
 static int rpmsg_ept_cb(struct rpmsg_device *rpdev, void *buf, int len,
 			void *priv, u32 addr)
@@ -280,7 +283,7 @@  static long rpmsg_eptdev_ioctl(struct file *fp, unsigned int cmd,
 	if (cmd != RPMSG_DESTROY_EPT_IOCTL)
 		return -EINVAL;
 
-	return rpmsg_eptdev_destroy(&eptdev->dev, NULL);
+	return rpmsg_chrdev_destroy_eptdev(&eptdev->dev, NULL);
 }
 
 static const struct file_operations rpmsg_eptdev_fops = {
@@ -339,10 +342,9 @@  static void rpmsg_eptdev_release_device(struct device *dev)
 	kfree(eptdev);
 }
 
-static int rpmsg_eptdev_create(struct rpmsg_ctrldev *ctrldev,
-			       struct rpmsg_channel_info chinfo)
+int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent,
+			       struct rpmsg_channel_info chinfo, struct class *rpmsg_class)
 {
-	struct rpmsg_device *rpdev = ctrldev->rpdev;
 	struct rpmsg_eptdev *eptdev;
 	struct device *dev;
 	int ret;
@@ -362,7 +364,7 @@  static int rpmsg_eptdev_create(struct rpmsg_ctrldev *ctrldev,
 
 	device_initialize(dev);
 	dev->class = rpmsg_class;
-	dev->parent = &ctrldev->dev;
+	dev->parent = parent;
 	dev->groups = rpmsg_eptdev_groups;
 	dev_set_drvdata(dev, eptdev);
 
@@ -405,6 +407,7 @@  static int rpmsg_eptdev_create(struct rpmsg_ctrldev *ctrldev,
 
 	return ret;
 }
+EXPORT_SYMBOL(rpmsg_chrdev_create_eptdev);
 
 static int rpmsg_ctrldev_open(struct inode *inode, struct file *filp)
 {
@@ -444,7 +447,7 @@  static long rpmsg_ctrldev_ioctl(struct file *fp, unsigned int cmd,
 	chinfo.src = eptinfo.src;
 	chinfo.dst = eptinfo.dst;
 
-	return rpmsg_eptdev_create(ctrldev, chinfo);
+	return rpmsg_chrdev_create_eptdev(ctrldev->rpdev, &ctrldev->dev, chinfo, rpmsg_class);
 };
 
 static const struct file_operations rpmsg_ctrldev_fops = {
@@ -530,7 +533,7 @@  static void rpmsg_chrdev_remove(struct rpmsg_device *rpdev)
 	int ret;
 
 	/* Destroy all endpoints */
-	ret = device_for_each_child(&ctrldev->dev, NULL, rpmsg_eptdev_destroy);
+	ret = device_for_each_child(&ctrldev->dev, NULL, rpmsg_chrdev_destroy_eptdev);
 	if (ret)
 		dev_warn(&rpdev->dev, "failed to nuke endpoints: %d\n", ret);
 
diff --git a/drivers/rpmsg/rpmsg_char.h b/drivers/rpmsg/rpmsg_char.h
new file mode 100644
index 000000000000..379d2ae2bee8
--- /dev/null
+++ b/drivers/rpmsg/rpmsg_char.h
@@ -0,0 +1,50 @@ 
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Copyright (C) STMicroelectronics 2021.
+ */
+
+#ifndef __RPMSG_CHRDEV_H__
+#define __RPMSG_CHRDEV_H__
+
+#if IS_REACHABLE(CONFIG_RPMSG_CHAR)
+/**
+ * rpmsg_chrdev_create_eptdev() - register char device based on an endpoint
+ * @rpdev:  prepared rpdev to be used for creating endpoints
+ * @parent: parent device
+ * @chinfo: assiated endpoint channel information.
+ *
+ * This function create a new rpmsg char endpoint device to instantiate a new
+ * endpoint based on chinfo information.
+ */
+int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent,
+			       struct rpmsg_channel_info chinfo, struct class *rpmsg_class);
+
+/**
+ * rpmsg_chrdev_destroy_eptdev() - destroy created char device endpoint.
+ * @data: private data associated to the endpoint device
+ *
+ * This function destroys a rpmsg char endpoint device created by the RPMSG_DESTROY_EPT_IOCTL
+ * control.
+ */
+int rpmsg_chrdev_destroy_eptdev(struct device *dev, void *data);
+
+#else  /*IS_REACHABLE(CONFIG_RPMSG_CHAR) */
+
+static inline int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent,
+					     struct rpmsg_channel_info chinfo,
+					     struct class *rpmsg_class)
+{
+	return -EINVAL;
+}
+
+static inline int rpmsg_chrdev_destroy_eptdev(struct device *dev, void *data)
+{
+	/* This shouldn't be possible */
+	WARN_ON(1);
+
+	return 0;
+}
+
+#endif /*IS_REACHABLE(CONFIG_RPMSG_CHAR) */
+
+#endif /*__RPMSG_CHRDEV_H__ */