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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/tools/usb/usbip/libsrc/usbip_host_common.h
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/* SPDX-License-Identifier: GPL-2.0-or-later */

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/*

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 * Copyright (C) 2015-2016 Samsung Electronics

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 *               Igor Kotrasinski <[email protected]>

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 *               Krzysztof Opasiak <[email protected]>

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 *

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 * Refactored from usbip_host_driver.c, which is:

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 * Copyright (C) 2011 matt mooney <[email protected]>

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 *               2005-2007 Takahiro Hirofuchi

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 */

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#ifndef __USBIP_HOST_COMMON_H

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#define __USBIP_HOST_COMMON_H

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#include <stdint.h>

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#include <libudev.h>

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#include <errno.h>

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#include "list.h"

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#include "usbip_common.h"

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#include "sysfs_utils.h"

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struct usbip_host_driver;

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struct usbip_host_driver_ops {

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	int (*open)(struct usbip_host_driver *hdriver);

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	void (*close)(struct usbip_host_driver *hdriver);

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	int (*refresh_device_list)(struct usbip_host_driver *hdriver);

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	struct usbip_exported_device * (*get_device)(

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		struct usbip_host_driver *hdriver, int num);

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	int (*read_device)(struct udev_device *sdev,

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			   struct usbip_usb_device *dev);

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	int (*read_interface)(struct usbip_usb_device *udev, int i,

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			      struct usbip_usb_interface *uinf);

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	int (*is_my_device)(struct udev_device *udev);

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};

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struct usbip_host_driver {

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	int ndevs;

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	/* list of exported device */

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	struct list_head edev_list;

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	const char *udev_subsystem;

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	struct usbip_host_driver_ops ops;

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};

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struct usbip_exported_device {

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	struct udev_device *sudev;

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	int32_t status;

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	struct usbip_usb_device udev;

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	struct list_head node;

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	struct usbip_usb_interface uinf[];

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};

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/* External API to access the driver */

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static inline int usbip_driver_open(struct usbip_host_driver *hdriver)

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{

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	if (!hdriver->ops.open)

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		return -EOPNOTSUPP;

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	return hdriver->ops.open(hdriver);

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}

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static inline void usbip_driver_close(struct usbip_host_driver *hdriver)

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{

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	if (!hdriver->ops.close)

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		return;

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	hdriver->ops.close(hdriver);

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}

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static inline int usbip_refresh_device_list(struct usbip_host_driver *hdriver)

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{

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	if (!hdriver->ops.refresh_device_list)

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		return -EOPNOTSUPP;

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	return hdriver->ops.refresh_device_list(hdriver);

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}

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static inline struct usbip_exported_device *

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usbip_get_device(struct usbip_host_driver *hdriver, int num)

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{

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	if (!hdriver->ops.get_device)

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		return NULL;

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	return hdriver->ops.get_device(hdriver, num);

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}

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/* Helper functions for implementing driver backend */

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int usbip_generic_driver_open(struct usbip_host_driver *hdriver);

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void usbip_generic_driver_close(struct usbip_host_driver *hdriver);

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int usbip_generic_refresh_device_list(struct usbip_host_driver *hdriver);

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int usbip_export_device(struct usbip_exported_device *edev, int sockfd);

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struct usbip_exported_device *usbip_generic_get_device(

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		struct usbip_host_driver *hdriver, int num);

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#endif /* __USBIP_HOST_COMMON_H */

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