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rpmsg: core: Add channel creation internal API 

Add the channel creation API as a first step to be able to define the
name service announcement as a rpmsg driver independent from the RPMsg
virtio bus.

Tested-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Link: https://lore.kernel.org/r/20201120214245.172963-6-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
zero-sugar-mainline-defconfig
Arnaud Pouliquen 2020-11-20 14:42:42 -07:00 committed by Bjorn Andersson
parent 77d372989d
commit 9753e12cd3
2 changed files with 54 additions and 0 deletions
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44
drivers/rpmsg/rpmsg_core.c
View File

@ -20,6 +20,50 @@
#include "rpmsg_internal.h"
/**
* rpmsg_create_channel() - create a new rpmsg channel
* using its name and address info.
* @rpdev: rpmsg device
* @chinfo: channel_info to bind
*
* Returns a pointer to the new rpmsg device on success, or NULL on error.
*/
struct rpmsg_device *rpmsg_create_channel(struct rpmsg_device *rpdev,
struct rpmsg_channel_info *chinfo)
{
if (WARN_ON(!rpdev))
return NULL;
if (!rpdev->ops || !rpdev->ops->create_channel) {
dev_err(&rpdev->dev, "no create_channel ops found\n");
return NULL;
}
return rpdev->ops->create_channel(rpdev, chinfo);
}
EXPORT_SYMBOL(rpmsg_create_channel);
/**
* rpmsg_release_channel() - release a rpmsg channel
* using its name and address info.
* @rpdev: rpmsg device
* @chinfo: channel_info to bind
*
* Returns 0 on success or an appropriate error value.
*/
int rpmsg_release_channel(struct rpmsg_device *rpdev,
struct rpmsg_channel_info *chinfo)
{
if (WARN_ON(!rpdev))
return -EINVAL;
if (!rpdev->ops || !rpdev->ops->release_channel) {
dev_err(&rpdev->dev, "no release_channel ops found\n");
return -ENXIO;
}
return rpdev->ops->release_channel(rpdev, chinfo);
}
EXPORT_SYMBOL(rpmsg_release_channel);
/**
* rpmsg_create_ept() - create a new rpmsg_endpoint
* @rpdev: rpmsg channel device

10
drivers/rpmsg/rpmsg_internal.h
View File

@ -20,6 +20,8 @@
/**
* struct rpmsg_device_ops - indirection table for the rpmsg_device operations
* @create_channel: create backend-specific channel, optional
* @release_channel: release backend-specific channel, optional
* @create_ept: create backend-specific endpoint, required
* @announce_create: announce presence of new channel, optional
* @announce_destroy: announce destruction of channel, optional
@ -29,6 +31,10 @@
* advertise new channels implicitly by creating the endpoints.
*/
struct rpmsg_device_ops {
struct rpmsg_device *(*create_channel)(struct rpmsg_device *rpdev,
struct rpmsg_channel_info *chinfo);
int (*release_channel)(struct rpmsg_device *rpdev,
struct rpmsg_channel_info *chinfo);
struct rpmsg_endpoint *(*create_ept)(struct rpmsg_device *rpdev,
rpmsg_rx_cb_t cb, void *priv,
struct rpmsg_channel_info chinfo);
@ -75,6 +81,10 @@ int rpmsg_unregister_device(struct device *parent,
struct device *rpmsg_find_device(struct device *parent,
struct rpmsg_channel_info *chinfo);
struct rpmsg_device *rpmsg_create_channel(struct rpmsg_device *rpdev,
struct rpmsg_channel_info *chinfo);
int rpmsg_release_channel(struct rpmsg_device *rpdev,
struct rpmsg_channel_info *chinfo);
/**
* rpmsg_chrdev_register_device() - register chrdev device based on rpdev
* @rpdev: prepared rpdev to be used for creating endpoints