ab95e090ae
The return value for of_property_count_u32_elems can be negative in the case of an error or the property is not found. It is incorrect to use size_t, unsigned type, as this can cause an overflow. Switch size from type size_t to int. Change-Id: Ica0425abd034b82994ab32087f04d602ce3dd9e9 Signed-off-by: Tony Truong <quic_truong@quicinc.com>
144 lines
3.2 KiB
C
144 lines
3.2 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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* Copyright (c) 2022 Qualcomm Innovation Center, Inc. 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 <linux/rpmsg/qcom_glink.h>
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#include <linux/of.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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pr_err_ratelimited("%s: Not ready\n", __func__);
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return -EAGAIN;
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}
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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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if (qcom_glink_is_wakeup(true))
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qrtr_print_wakeup_reason(data);
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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_array svc_arr = {NULL, 0};
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struct qrtr_smd_dev *qdev;
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u32 net_id;
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int size;
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bool rt;
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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 = of_property_read_u32(rpdev->dev.of_node, "qcom,net-id", &net_id);
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if (rc < 0)
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net_id = QRTR_EP_NET_ID_AUTO;
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rt = of_property_read_bool(rpdev->dev.of_node, "qcom,low-latency");
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size = of_property_count_u32_elems(rpdev->dev.of_node, "qcom,no-wake-svc");
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if (size > 0) {
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svc_arr.size = size;
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svc_arr.arr = kmalloc_array(size, sizeof(u32), GFP_KERNEL);
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if (!svc_arr.arr)
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return -ENOMEM;
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of_property_read_u32_array(rpdev->dev.of_node, "qcom,no-wake-svc",
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svc_arr.arr, size);
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}
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rc = qrtr_endpoint_register(&qdev->ep, net_id, rt, &svc_arr);
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kfree(svc_arr.arr);
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if (rc) {
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dev_err(qdev->dev, "endpoint register failed: %d, low-latency: %d\n", rc, rt);
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return rc;
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}
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dev_set_drvdata(&rpdev->dev, qdev);
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pr_info("%s: SMD QRTR driver probed\n", __func__);
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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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