97fb5e8d9b
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 and only version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 294 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141900.825281744@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
112 lines
2.3 KiB
C
112 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2015, Sony Mobile Communications Inc.
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* Copyright (c) 2013, The Linux Foundation. All rights reserved.
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*/
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#include <linux/module.h>
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#include <linux/skbuff.h>
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#include <linux/rpmsg.h>
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#include "qrtr.h"
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struct qrtr_smd_dev {
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struct qrtr_endpoint ep;
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struct rpmsg_endpoint *channel;
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struct device *dev;
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};
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/* from smd to qrtr */
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static int qcom_smd_qrtr_callback(struct rpmsg_device *rpdev,
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void *data, int len, void *priv, u32 addr)
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{
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struct qrtr_smd_dev *qdev = dev_get_drvdata(&rpdev->dev);
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int rc;
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if (!qdev)
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return -EAGAIN;
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rc = qrtr_endpoint_post(&qdev->ep, data, len);
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if (rc == -EINVAL) {
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dev_err(qdev->dev, "invalid ipcrouter packet\n");
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/* return 0 to let smd drop the packet */
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rc = 0;
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}
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return rc;
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}
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/* from qrtr to smd */
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static int qcom_smd_qrtr_send(struct qrtr_endpoint *ep, struct sk_buff *skb)
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{
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struct qrtr_smd_dev *qdev = container_of(ep, struct qrtr_smd_dev, ep);
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int rc;
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rc = skb_linearize(skb);
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if (rc)
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goto out;
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rc = rpmsg_send(qdev->channel, skb->data, skb->len);
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out:
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if (rc)
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kfree_skb(skb);
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else
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consume_skb(skb);
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return rc;
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}
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static int qcom_smd_qrtr_probe(struct rpmsg_device *rpdev)
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{
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struct qrtr_smd_dev *qdev;
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int rc;
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qdev = devm_kzalloc(&rpdev->dev, sizeof(*qdev), GFP_KERNEL);
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if (!qdev)
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return -ENOMEM;
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qdev->channel = rpdev->ept;
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qdev->dev = &rpdev->dev;
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qdev->ep.xmit = qcom_smd_qrtr_send;
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rc = qrtr_endpoint_register(&qdev->ep, QRTR_EP_NID_AUTO);
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if (rc)
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return rc;
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dev_set_drvdata(&rpdev->dev, qdev);
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dev_dbg(&rpdev->dev, "Qualcomm SMD QRTR driver probed\n");
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return 0;
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}
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static void qcom_smd_qrtr_remove(struct rpmsg_device *rpdev)
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{
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struct qrtr_smd_dev *qdev = dev_get_drvdata(&rpdev->dev);
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qrtr_endpoint_unregister(&qdev->ep);
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dev_set_drvdata(&rpdev->dev, NULL);
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}
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static const struct rpmsg_device_id qcom_smd_qrtr_smd_match[] = {
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{ "IPCRTR" },
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{}
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};
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static struct rpmsg_driver qcom_smd_qrtr_driver = {
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.probe = qcom_smd_qrtr_probe,
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.remove = qcom_smd_qrtr_remove,
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.callback = qcom_smd_qrtr_callback,
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.id_table = qcom_smd_qrtr_smd_match,
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.drv = {
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.name = "qcom_smd_qrtr",
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},
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};
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module_rpmsg_driver(qcom_smd_qrtr_driver);
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MODULE_ALIAS("rpmsg:IPCRTR");
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MODULE_DESCRIPTION("Qualcomm IPC-Router SMD interface driver");
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MODULE_LICENSE("GPL v2");
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