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![Loic Poulain](/assets/img/avatar_default.png)
HCI RX/TX byte counters were only incremented when sending ACL packets. To reflect the real HCI traffic, we need to increment these counters on HCI events and HCI commands as well. Increment error counter on rpmsg errors. Signed-off-by: Loic Poulain <loic.poulain@linaro.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
239 lines
5.5 KiB
C
239 lines
5.5 KiB
C
/*
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* Copyright (c) 2016, Linaro Ltd.
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* Copyright (c) 2015, Sony Mobile Communications Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/rpmsg.h>
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#include <linux/of.h>
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#include <linux/soc/qcom/wcnss_ctrl.h>
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#include <linux/platform_device.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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#include "btqca.h"
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struct btqcomsmd {
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struct hci_dev *hdev;
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bdaddr_t bdaddr;
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struct rpmsg_endpoint *acl_channel;
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struct rpmsg_endpoint *cmd_channel;
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};
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static int btqcomsmd_recv(struct hci_dev *hdev, unsigned int type,
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const void *data, size_t count)
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{
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struct sk_buff *skb;
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/* Use GFP_ATOMIC as we're in IRQ context */
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skb = bt_skb_alloc(count, GFP_ATOMIC);
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if (!skb) {
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hdev->stat.err_rx++;
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return -ENOMEM;
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}
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hci_skb_pkt_type(skb) = type;
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skb_put_data(skb, data, count);
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return hci_recv_frame(hdev, skb);
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}
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static int btqcomsmd_acl_callback(struct rpmsg_device *rpdev, void *data,
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int count, void *priv, u32 addr)
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{
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struct btqcomsmd *btq = priv;
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btq->hdev->stat.byte_rx += count;
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return btqcomsmd_recv(btq->hdev, HCI_ACLDATA_PKT, data, count);
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}
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static int btqcomsmd_cmd_callback(struct rpmsg_device *rpdev, void *data,
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int count, void *priv, u32 addr)
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{
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struct btqcomsmd *btq = priv;
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btq->hdev->stat.byte_rx += count;
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return btqcomsmd_recv(btq->hdev, HCI_EVENT_PKT, data, count);
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}
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static int btqcomsmd_send(struct hci_dev *hdev, struct sk_buff *skb)
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{
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struct btqcomsmd *btq = hci_get_drvdata(hdev);
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int ret;
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switch (hci_skb_pkt_type(skb)) {
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case HCI_ACLDATA_PKT:
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ret = rpmsg_send(btq->acl_channel, skb->data, skb->len);
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if (ret) {
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hdev->stat.err_tx++;
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break;
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}
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hdev->stat.acl_tx++;
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hdev->stat.byte_tx += skb->len;
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break;
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case HCI_COMMAND_PKT:
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ret = rpmsg_send(btq->cmd_channel, skb->data, skb->len);
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if (ret) {
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hdev->stat.err_tx++;
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break;
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}
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hdev->stat.cmd_tx++;
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hdev->stat.byte_tx += skb->len;
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break;
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default:
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ret = -EILSEQ;
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break;
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}
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if (!ret)
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kfree_skb(skb);
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return ret;
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}
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static int btqcomsmd_open(struct hci_dev *hdev)
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{
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return 0;
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}
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static int btqcomsmd_close(struct hci_dev *hdev)
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{
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return 0;
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}
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static int btqcomsmd_setup(struct hci_dev *hdev)
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{
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struct btqcomsmd *btq = hci_get_drvdata(hdev);
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struct sk_buff *skb;
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int err;
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skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
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if (IS_ERR(skb))
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return PTR_ERR(skb);
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kfree_skb(skb);
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/* Devices do not have persistent storage for BD address. If no
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* BD address has been retrieved during probe, mark the device
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* as having an invalid BD address.
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*/
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if (!bacmp(&btq->bdaddr, BDADDR_ANY)) {
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set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
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return 0;
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}
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/* When setting a configured BD address fails, mark the device
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* as having an invalid BD address.
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*/
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err = qca_set_bdaddr_rome(hdev, &btq->bdaddr);
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if (err) {
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set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
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return 0;
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}
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return 0;
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}
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static int btqcomsmd_probe(struct platform_device *pdev)
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{
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struct btqcomsmd *btq;
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struct hci_dev *hdev;
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void *wcnss;
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int ret;
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btq = devm_kzalloc(&pdev->dev, sizeof(*btq), GFP_KERNEL);
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if (!btq)
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return -ENOMEM;
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wcnss = dev_get_drvdata(pdev->dev.parent);
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btq->acl_channel = qcom_wcnss_open_channel(wcnss, "APPS_RIVA_BT_ACL",
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btqcomsmd_acl_callback, btq);
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if (IS_ERR(btq->acl_channel))
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return PTR_ERR(btq->acl_channel);
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btq->cmd_channel = qcom_wcnss_open_channel(wcnss, "APPS_RIVA_BT_CMD",
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btqcomsmd_cmd_callback, btq);
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if (IS_ERR(btq->cmd_channel))
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return PTR_ERR(btq->cmd_channel);
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/* The local-bd-address property is usually injected by the
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* bootloader which has access to the allocated BD address.
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*/
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if (!of_property_read_u8_array(pdev->dev.of_node, "local-bd-address",
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(u8 *)&btq->bdaddr, sizeof(bdaddr_t))) {
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dev_info(&pdev->dev, "BD address %pMR retrieved from device-tree",
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&btq->bdaddr);
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}
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hdev = hci_alloc_dev();
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if (!hdev)
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return -ENOMEM;
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hci_set_drvdata(hdev, btq);
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btq->hdev = hdev;
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SET_HCIDEV_DEV(hdev, &pdev->dev);
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hdev->bus = HCI_SMD;
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hdev->open = btqcomsmd_open;
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hdev->close = btqcomsmd_close;
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hdev->send = btqcomsmd_send;
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hdev->setup = btqcomsmd_setup;
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hdev->set_bdaddr = qca_set_bdaddr_rome;
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ret = hci_register_dev(hdev);
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if (ret < 0) {
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hci_free_dev(hdev);
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return ret;
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}
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platform_set_drvdata(pdev, btq);
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return 0;
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}
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static int btqcomsmd_remove(struct platform_device *pdev)
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{
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struct btqcomsmd *btq = platform_get_drvdata(pdev);
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hci_unregister_dev(btq->hdev);
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hci_free_dev(btq->hdev);
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rpmsg_destroy_ept(btq->cmd_channel);
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rpmsg_destroy_ept(btq->acl_channel);
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return 0;
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}
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static const struct of_device_id btqcomsmd_of_match[] = {
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{ .compatible = "qcom,wcnss-bt", },
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{ },
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};
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MODULE_DEVICE_TABLE(of, btqcomsmd_of_match);
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static struct platform_driver btqcomsmd_driver = {
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.probe = btqcomsmd_probe,
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.remove = btqcomsmd_remove,
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.driver = {
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.name = "btqcomsmd",
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.of_match_table = btqcomsmd_of_match,
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},
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};
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module_platform_driver(btqcomsmd_driver);
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MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>");
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MODULE_DESCRIPTION("Qualcomm SMD HCI driver");
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MODULE_LICENSE("GPL v2");
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