Merge "defconfig: sm8150: Enable MHI transport for qrtr" (d04b4caf) · Commits · e / devices / android_kernel_oneplus_sm8150

arch/arm64/configs/sm8150-perf_defconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -222,6 +222,7 @@ CONFIG_NET_ACT_MIRRED=y
		CONFIG_NET_ACT_SKBEDIT=y
		CONFIG_QRTR=y
		CONFIG_QRTR_SMD=y
		CONFIG_QRTR_MHI=y
		CONFIG_RMNET_DATA=y
		CONFIG_RMNET_DATA_FC=y
		CONFIG_RMNET_DATA_DEBUG_PKT=y

arch/arm64/configs/sm8150_defconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -228,6 +228,7 @@ CONFIG_NET_ACT_SKBEDIT=y
		CONFIG_DNS_RESOLVER=y
		CONFIG_QRTR=y
		CONFIG_QRTR_SMD=y
		CONFIG_QRTR_MHI=y
		CONFIG_RMNET_DATA=y
		CONFIG_RMNET_DATA_FC=y
		CONFIG_RMNET_DATA_DEBUG_PKT=y

net/qrtr/Kconfig

+7 −0

Original line number	Diff line number	Diff line
		@@ -21,4 +21,11 @@ config QRTR_SMD
		Say Y here to support SMD based ipcrouter channels. SMD is the
		most common transport for IPC Router.

		config QRTR_MHI
		tristate "MHI IPC Router channels"
		depends on MHI_BUS \|\| (COMPILE_TEST && MHI_BUS=n)
		---help---
		Say Y here to support MHI based ipcrouter channels. MHI is the
		transport used for external modem connections for IPC Router.

		endif # QRTR

net/qrtr/Makefile

+3 −0

Original line number	Diff line number	Diff line
		@@ -2,3 +2,6 @@ obj-$(CONFIG_QRTR) := qrtr.o

		obj-$(CONFIG_QRTR_SMD) += qrtr-smd.o
		qrtr-smd-y := smd.o

		obj-$(CONFIG_QRTR_MHI) += qrtr-mhi.o
		qrtr-mhi-y := mhi.o

net/qrtr/mhi.c

0 → 100644

+145 −0

Original line number	Diff line number	Diff line
		/* Copyright (c) 2018, The Linux Foundation. All rights reserved.
		*
		* 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.
		*/

		#include <linux/module.h>
		#include <linux/skbuff.h>
		#include <linux/mod_devicetable.h>
		#include <linux/mhi.h>

		#include "qrtr.h"

		struct qrtr_mhi_dev {
		struct qrtr_endpoint ep;
		struct mhi_device *mhi_dev;
		struct device *dev;
		struct completion ul_done;
		};

		/* from mhi to qrtr */
		static void qcom_mhi_qrtr_dl_callback(struct mhi_device *mhi_dev,
		struct mhi_result *mhi_res)
		{
		struct qrtr_mhi_dev *qdev = dev_get_drvdata(&mhi_dev->dev);
		int rc;

		if (!qdev \|\| mhi_res->transaction_status)
		return;

		rc = qrtr_endpoint_post(&qdev->ep, mhi_res->buf_addr,
		mhi_res->bytes_xferd);
		if (rc == -EINVAL)
		dev_err(qdev->dev, "invalid ipcrouter packet\n");
		}

		/* from mhi to qrtr */
		static void qcom_mhi_qrtr_ul_callback(struct mhi_device *mhi_dev,
		struct mhi_result *mhi_res)
		{
		struct qrtr_mhi_dev *qdev = dev_get_drvdata(&mhi_dev->dev);
		struct sk_buff *skb = mhi_res->buf_addr;

		if (!mhi_res->transaction_status) {
		complete(&qdev->ul_done);
		consume_skb(skb);
		} else {
		kfree_skb(skb);
		}
		}

		/* from qrtr to mhi */
		static int qcom_mhi_qrtr_send(struct qrtr_endpoint ep, struct sk_buff skb)
		{
		struct qrtr_mhi_dev *qdev = container_of(ep, struct qrtr_mhi_dev, ep);
		int rc;

		rc = skb_linearize(skb);
		if (rc)
		goto out;

		reinit_completion(&qdev->ul_done);
		rc = mhi_queue_transfer(qdev->mhi_dev, DMA_TO_DEVICE, skb, skb->len,
		MHI_EOT);
		if (rc)
		goto out;

		rc = wait_for_completion_interruptible_timeout(&qdev->ul_done, HZ * 5);
		if (rc > 0)
		rc = 0;
		else if (rc == 0)
		rc = -ETIMEDOUT;

		out:
		return rc;
		}

		static int qcom_mhi_qrtr_probe(struct mhi_device *mhi_dev,
		const struct mhi_device_id *id)
		{
		struct qrtr_mhi_dev *qdev;
		int rc;

		qdev = devm_kzalloc(&mhi_dev->dev, sizeof(*qdev), GFP_KERNEL);
		if (!qdev)
		return -ENOMEM;

		qdev->mhi_dev = mhi_dev;
		qdev->dev = &mhi_dev->dev;
		qdev->ep.xmit = qcom_mhi_qrtr_send;

		init_completion(&qdev->ul_done);

		rc = qrtr_endpoint_register(&qdev->ep, QRTR_EP_NID_AUTO);
		if (rc)
		return rc;

		dev_set_drvdata(&mhi_dev->dev, qdev);

		rc = mhi_prepare_for_transfer(mhi_dev);
		if (rc)
		return rc;

		dev_dbg(qdev->dev, "Qualcomm MHI QRTR driver probed\n");

		return 0;
		}

		static void qcom_mhi_qrtr_remove(struct mhi_device *mhi_dev)
		{
		struct qrtr_mhi_dev *qdev = dev_get_drvdata(&mhi_dev->dev);

		qrtr_endpoint_unregister(&qdev->ep);
		complete(&qdev->ul_done);
		dev_set_drvdata(&mhi_dev->dev, NULL);
		}

		static const struct mhi_device_id qcom_mhi_qrtr_mhi_match[] = {
		{ .chan = "IPCR" },
		{}
		};

		static struct mhi_driver qcom_mhi_qrtr_driver = {
		.probe = qcom_mhi_qrtr_probe,
		.remove = qcom_mhi_qrtr_remove,
		.dl_xfer_cb = qcom_mhi_qrtr_dl_callback,
		.ul_xfer_cb = qcom_mhi_qrtr_ul_callback,
		.id_table = qcom_mhi_qrtr_mhi_match,
		.driver = {
		.name = "qcom_mhi_qrtr",
		.owner = THIS_MODULE,
		},
		};

		module_driver(qcom_mhi_qrtr_driver, mhi_driver_register,
		mhi_driver_unregister);

		MODULE_DESCRIPTION("Qualcomm IPC-Router MHI interface driver");
		MODULE_LICENSE("GPL v2");