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net: Add Qualcomm IPC router
Add an implementation of Qualcomm's IPC router protocol, used to communicate with service providing remote processors. Signed-off-by: Courtney Cavin <courtney.cavin@sonymobile.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> [bjorn: Cope with 0 being a valid node id and implement RTM_NEWADDR] Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -201,8 +201,9 @@ struct ucred {
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#define AF_NFC 39 /* NFC sockets */
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#define AF_NFC 39 /* NFC sockets */
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#define AF_VSOCK 40 /* vSockets */
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#define AF_VSOCK 40 /* vSockets */
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#define AF_KCM 41 /* Kernel Connection Multiplexor*/
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#define AF_KCM 41 /* Kernel Connection Multiplexor*/
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#define AF_QIPCRTR 42 /* Qualcomm IPC Router */
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#define AF_MAX 42 /* For now.. */
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#define AF_MAX 43 /* For now.. */
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/* Protocol families, same as address families. */
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/* Protocol families, same as address families. */
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#define PF_UNSPEC AF_UNSPEC
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#define PF_UNSPEC AF_UNSPEC
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@ -249,6 +250,7 @@ struct ucred {
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#define PF_NFC AF_NFC
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#define PF_NFC AF_NFC
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#define PF_VSOCK AF_VSOCK
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#define PF_VSOCK AF_VSOCK
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#define PF_KCM AF_KCM
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#define PF_KCM AF_KCM
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#define PF_QIPCRTR AF_QIPCRTR
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#define PF_MAX AF_MAX
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#define PF_MAX AF_MAX
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/* Maximum queue length specifiable by listen. */
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/* Maximum queue length specifiable by listen. */
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12
include/uapi/linux/qrtr.h
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12
include/uapi/linux/qrtr.h
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@ -0,0 +1,12 @@
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#ifndef _LINUX_QRTR_H
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#define _LINUX_QRTR_H
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#include <linux/socket.h>
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struct sockaddr_qrtr {
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__kernel_sa_family_t sq_family;
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__u32 sq_node;
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__u32 sq_port;
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};
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#endif /* _LINUX_QRTR_H */
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@ -236,6 +236,7 @@ source "net/mpls/Kconfig"
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source "net/hsr/Kconfig"
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source "net/hsr/Kconfig"
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source "net/switchdev/Kconfig"
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source "net/switchdev/Kconfig"
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source "net/l3mdev/Kconfig"
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source "net/l3mdev/Kconfig"
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source "net/qrtr/Kconfig"
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config RPS
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config RPS
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bool
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bool
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@ -78,3 +78,4 @@ endif
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ifneq ($(CONFIG_NET_L3_MASTER_DEV),)
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ifneq ($(CONFIG_NET_L3_MASTER_DEV),)
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obj-y += l3mdev/
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obj-y += l3mdev/
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endif
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endif
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obj-$(CONFIG_QRTR) += qrtr/
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24
net/qrtr/Kconfig
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24
net/qrtr/Kconfig
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@ -0,0 +1,24 @@
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# Qualcomm IPC Router configuration
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#
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config QRTR
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tristate "Qualcomm IPC Router support"
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depends on ARCH_QCOM || COMPILE_TEST
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---help---
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Say Y if you intend to use Qualcomm IPC router protocol. The
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protocol is used to communicate with services provided by other
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hardware blocks in the system.
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In order to do service lookups, a userspace daemon is required to
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maintain a service listing.
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if QRTR
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config QRTR_SMD
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tristate "SMD IPC Router channels"
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depends on QCOM_SMD || COMPILE_TEST
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---help---
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Say Y here to support SMD based ipcrouter channels. SMD is the
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most common transport for IPC Router.
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endif # QRTR
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2
net/qrtr/Makefile
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2
net/qrtr/Makefile
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@ -0,0 +1,2 @@
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obj-$(CONFIG_QRTR) := qrtr.o
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obj-$(CONFIG_QRTR_SMD) += smd.o
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1007
net/qrtr/qrtr.c
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1007
net/qrtr/qrtr.c
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File diff suppressed because it is too large
Load Diff
31
net/qrtr/qrtr.h
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31
net/qrtr/qrtr.h
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@ -0,0 +1,31 @@
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#ifndef __QRTR_H_
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#define __QRTR_H_
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#include <linux/types.h>
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struct sk_buff;
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/* endpoint node id auto assignment */
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#define QRTR_EP_NID_AUTO (-1)
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/**
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* struct qrtr_endpoint - endpoint handle
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* @xmit: Callback for outgoing packets
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*
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* The socket buffer passed to the xmit function becomes owned by the endpoint
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* driver. As such, when the driver is done with the buffer, it should
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* call kfree_skb() on failure, or consume_skb() on success.
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*/
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struct qrtr_endpoint {
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int (*xmit)(struct qrtr_endpoint *ep, struct sk_buff *skb);
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/* private: not for endpoint use */
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struct qrtr_node *node;
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};
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int qrtr_endpoint_register(struct qrtr_endpoint *ep, unsigned int nid);
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void qrtr_endpoint_unregister(struct qrtr_endpoint *ep);
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int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len);
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#endif
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117
net/qrtr/smd.c
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117
net/qrtr/smd.c
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@ -0,0 +1,117 @@
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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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* 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/skbuff.h>
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#include <linux/soc/qcom/smd.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 qcom_smd_channel *channel;
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};
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/* from smd to qrtr */
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static int qcom_smd_qrtr_callback(struct qcom_smd_device *sdev,
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const void *data, size_t len)
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{
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struct qrtr_smd_dev *qdev = dev_get_drvdata(&sdev->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(&sdev->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 = qcom_smd_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 qcom_smd_device *sdev)
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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(&sdev->dev, sizeof(*qdev), GFP_KERNEL);
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if (!qdev)
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return -ENOMEM;
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qdev->channel = sdev->channel;
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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(&sdev->dev, qdev);
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dev_dbg(&sdev->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 qcom_smd_device *sdev)
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{
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struct qrtr_smd_dev *qdev = dev_get_drvdata(&sdev->dev);
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qrtr_endpoint_unregister(&qdev->ep);
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dev_set_drvdata(&sdev->dev, NULL);
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}
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static const struct qcom_smd_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 qcom_smd_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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.smd_match_table = qcom_smd_qrtr_smd_match,
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.driver = {
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.name = "qcom_smd_qrtr",
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.owner = THIS_MODULE,
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},
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};
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module_qcom_smd_driver(qcom_smd_qrtr_driver);
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MODULE_DESCRIPTION("Qualcomm IPC-Router SMD interface driver");
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MODULE_LICENSE("GPL v2");
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