diff options
| author | Arnaud Pouliquen <arnaud.pouliquen@st.com> | 2020-11-21 00:42:42 +0300 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2020-11-24 19:11:35 +0300 |
| commit | 9753e12cd3bdaf9bb7cbcaa7476c1eb088538e3e (patch) | |
| tree | 2efb967a544167d26753b62c01577577b02aeed3 /drivers/rpmsg | |
| parent | 77d372989db974464b43455a89462720f0d96a0f (diff) | |
| download | linux-9753e12cd3bdaf9bb7cbcaa7476c1eb088538e3e.tar.xz | |
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>
Diffstat (limited to 'drivers/rpmsg')
| -rw-r--r-- | drivers/rpmsg/rpmsg_core.c | 44 | ||||
| -rw-r--r-- | drivers/rpmsg/rpmsg_internal.h | 10 |
2 files changed, 54 insertions, 0 deletions
diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c index 91de940896e3..e5daee4f9373 100644 --- a/drivers/rpmsg/rpmsg_core.c +++ b/drivers/rpmsg/rpmsg_core.c @@ -21,6 +21,50 @@ #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 * @cb: rx callback handler diff --git a/drivers/rpmsg/rpmsg_internal.h b/drivers/rpmsg/rpmsg_internal.h index 3fc83cd50e98..f1de73e0f2d6 100644 --- a/drivers/rpmsg/rpmsg_internal.h +++ b/drivers/rpmsg/rpmsg_internal.h @@ -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 |