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From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: ohad@wizery.com, bjorn.andersson@linaro.org
Cc: guennadi.liakhovetski@linux.intel.com, arnaud.pouliquen@st.com,
	linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 6/9] rpmsg: core: Add channel creation internal API
Date: Tue, 13 Oct 2020 17:25:16 -0600	[thread overview]
Message-ID: <20201013232519.1367542-7-mathieu.poirier@linaro.org> (raw)
In-Reply-To: <20201013232519.1367542-1-mathieu.poirier@linaro.org>

From: Arnaud Pouliquen <arnaud.pouliquen@st.com>

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.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
 drivers/rpmsg/rpmsg_core.c     | 44 ++++++++++++++++++++++++++++++++++
 drivers/rpmsg/rpmsg_internal.h |  4 ++++
 include/linux/rpmsg.h          |  6 +++++
 3 files changed, 54 insertions(+)

diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c
index a6361cad608b..a5c4b80debf3 100644
--- a/drivers/rpmsg/rpmsg_core.c
+++ b/drivers/rpmsg/rpmsg_core.c
@@ -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
diff --git a/drivers/rpmsg/rpmsg_internal.h b/drivers/rpmsg/rpmsg_internal.h
index 094cf968d2d3..b9b34b416b7b 100644
--- a/drivers/rpmsg/rpmsg_internal.h
+++ b/drivers/rpmsg/rpmsg_internal.h
@@ -56,6 +56,10 @@ 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
diff --git a/include/linux/rpmsg.h b/include/linux/rpmsg.h
index 165e4c6d4cd3..eb70463a9f2e 100644
--- a/include/linux/rpmsg.h
+++ b/include/linux/rpmsg.h
@@ -42,6 +42,8 @@ typedef int (*rpmsg_rx_cb_t)(struct rpmsg_device *, void *, int, void *, u32);
 /**
  * struct rpmsg_device_ops - indirection table for the rpmsg_device operations
  * @is_little_endian:	returns true if using little endian byte ordering
+ * @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
@@ -52,6 +54,10 @@ typedef int (*rpmsg_rx_cb_t)(struct rpmsg_device *, void *, int, void *, u32);
  */
 struct rpmsg_device_ops {
 	bool (*is_little_endian)(struct rpmsg_device *rpdev);
+	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);
-- 
2.25.1


  parent reply	other threads:[~2020-10-14  9:20 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-13 23:25 [PATCH v2 0/9] rpmsg: Make RPMSG name service modular Mathieu Poirier
2020-10-13 23:25 ` [PATCH v2 1/9] rpmsg: Move rpmsg_endpoint_ops to rpmsg.h Mathieu Poirier
2020-10-15  8:48   ` Arnaud POULIQUEN
2020-10-13 23:25 ` [PATCH v2 2/9] rpmsg: Introduce __rpmsg{16|32|64} types Mathieu Poirier
2020-10-14 16:31   ` Arnaud POULIQUEN
2020-10-15 19:32     ` Mathieu Poirier
2020-10-16  9:41       ` Arnaud POULIQUEN
2020-10-13 23:25 ` [PATCH v2 3/9] rpmsg: virtio: Move from virtio to rpmsg byte conversion Mathieu Poirier
2020-10-14 17:04   ` Arnaud POULIQUEN
2020-10-15 19:46     ` Mathieu Poirier
2020-10-13 23:25 ` [PATCH v2 4/9] rpmsg: Move rpmsg_hr and rpmsg_ns_msg to header file Mathieu Poirier
2020-10-15  8:33   ` Arnaud POULIQUEN
2020-10-15 20:19     ` Mathieu Poirier
2020-10-16  9:45       ` Arnaud POULIQUEN
2020-10-13 23:25 ` [PATCH v2 5/9] rpmsg: virtio: Rename rpmsg_create_channel Mathieu Poirier
2020-10-13 23:25 ` Mathieu Poirier [this message]
2020-10-13 23:25 ` [PATCH v2 7/9] rpmsg: virtio: Add rpmsg channel device ops Mathieu Poirier
2020-10-13 23:25 ` [PATCH v2 8/9] rpmsg: Make rpmsg_{register|unregister}_device() public Mathieu Poirier
2020-10-15  8:47   ` Arnaud POULIQUEN
2020-10-13 23:25 ` [PATCH v2 9/9] rpmsg: Turn name service into a stand alone driver Mathieu Poirier
2020-10-14 10:18 ` [PATCH v2 0/9] rpmsg: Make RPMSG name service modular Guennadi Liakhovetski

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