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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2015, Sony Mobile Communications Inc.
* Copyright (c) 2013, The Linux Foundation. All rights reserved.
*/
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/rpmsg.h>
#include "qrtr.h"
struct qrtr_smd_dev {
struct qrtr_endpoint ep;
struct rpmsg_endpoint *channel;
struct device *dev;
};
/* from smd to qrtr */
static int qcom_smd_qrtr_callback(struct rpmsg_device *rpdev,
void *data, int len, void *priv, u32 addr)
{
struct qrtr_smd_dev *qdev = dev_get_drvdata(&rpdev->dev);
int rc;
if (!qdev)
return -EAGAIN;
rc = qrtr_endpoint_post(&qdev->ep, data, len);
if (rc == -EINVAL) {
dev_err(qdev->dev, "invalid ipcrouter packet\n");
/* return 0 to let smd drop the packet */
rc = 0;
}
return rc;
}
/* from qrtr to smd */
static int qcom_smd_qrtr_send(struct qrtr_endpoint *ep, struct sk_buff *skb)
{
struct qrtr_smd_dev *qdev = container_of(ep, struct qrtr_smd_dev, ep);
int rc;
rc = skb_linearize(skb);
if (rc)
goto out;
rc = rpmsg_send(qdev->channel, skb->data, skb->len);
out:
if (rc)
kfree_skb(skb);
else
consume_skb(skb);
return rc;
}
static int qcom_smd_qrtr_probe(struct rpmsg_device *rpdev)
{
struct qrtr_smd_dev *qdev;
int rc;
qdev = devm_kzalloc(&rpdev->dev, sizeof(*qdev), GFP_KERNEL);
if (!qdev)
return -ENOMEM;
qdev->channel = rpdev->ept;
qdev->dev = &rpdev->dev;
qdev->ep.xmit = qcom_smd_qrtr_send;
rc = qrtr_endpoint_register(&qdev->ep, QRTR_EP_NID_AUTO);
if (rc)
return rc;
dev_set_drvdata(&rpdev->dev, qdev);
dev_dbg(&rpdev->dev, "Qualcomm SMD QRTR driver probed\n");
return 0;
}
static void qcom_smd_qrtr_remove(struct rpmsg_device *rpdev)
{
struct qrtr_smd_dev *qdev = dev_get_drvdata(&rpdev->dev);
qrtr_endpoint_unregister(&qdev->ep);
dev_set_drvdata(&rpdev->dev, NULL);
}
static const struct rpmsg_device_id qcom_smd_qrtr_smd_match[] = {
{ "IPCRTR" },
{}
};
static struct rpmsg_driver qcom_smd_qrtr_driver = {
.probe = qcom_smd_qrtr_probe,
.remove = qcom_smd_qrtr_remove,
.callback = qcom_smd_qrtr_callback,
.id_table = qcom_smd_qrtr_smd_match,
.drv = {
.name = "qcom_smd_qrtr",
},
};
module_rpmsg_driver(qcom_smd_qrtr_driver);
MODULE_ALIAS("rpmsg:IPCRTR");
MODULE_DESCRIPTION("Qualcomm IPC-Router SMD interface driver");
MODULE_LICENSE("GPL v2");
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