1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright (C) 2015-2016 Samsung Electronics 4 * Igor Kotrasinski <i.kotrasinsk@samsung.com> 5 * Krzysztof Opasiak <k.opasiak@samsung.com> 6 * 7 * Refactored from usbip_host_driver.c, which is: 8 * Copyright (C) 2011 matt mooney <mfm@muteddisk.com> 9 * 2005-2007 Takahiro Hirofuchi 10 */ 11 12 #ifndef __USBIP_HOST_COMMON_H 13 #define __USBIP_HOST_COMMON_H 14 15 #include <stdint.h> 16 #include <libudev.h> 17 #include <errno.h> 18 #include "list.h" 19 #include "usbip_common.h" 20 #include "sysfs_utils.h" 21 22 struct usbip_host_driver; 23 24 struct usbip_host_driver_ops { 25 int (*open)(struct usbip_host_driver *hdriver); 26 void (*close)(struct usbip_host_driver *hdriver); 27 int (*refresh_device_list)(struct usbip_host_driver *hdriver); 28 struct usbip_exported_device * (*get_device)( 29 struct usbip_host_driver *hdriver, int num); 30 31 int (*read_device)(struct udev_device *sdev, 32 struct usbip_usb_device *dev); 33 int (*read_interface)(struct usbip_usb_device *udev, int i, 34 struct usbip_usb_interface *uinf); 35 int (*is_my_device)(struct udev_device *udev); 36 }; 37 38 struct usbip_host_driver { 39 int ndevs; 40 /* list of exported device */ 41 struct list_head edev_list; 42 const char *udev_subsystem; 43 struct usbip_host_driver_ops ops; 44 }; 45 46 struct usbip_exported_device { 47 struct udev_device *sudev; 48 int32_t status; 49 struct usbip_usb_device udev; 50 struct list_head node; 51 struct usbip_usb_interface uinf[]; 52 }; 53 54 /* External API to access the driver */ 55 static inline int usbip_driver_open(struct usbip_host_driver *hdriver) 56 { 57 if (!hdriver->ops.open) 58 return -EOPNOTSUPP; 59 return hdriver->ops.open(hdriver); 60 } 61 62 static inline void usbip_driver_close(struct usbip_host_driver *hdriver) 63 { 64 if (!hdriver->ops.close) 65 return; 66 hdriver->ops.close(hdriver); 67 } 68 69 static inline int usbip_refresh_device_list(struct usbip_host_driver *hdriver) 70 { 71 if (!hdriver->ops.refresh_device_list) 72 return -EOPNOTSUPP; 73 return hdriver->ops.refresh_device_list(hdriver); 74 } 75 76 static inline struct usbip_exported_device * 77 usbip_get_device(struct usbip_host_driver *hdriver, int num) 78 { 79 if (!hdriver->ops.get_device) 80 return NULL; 81 return hdriver->ops.get_device(hdriver, num); 82 } 83 84 /* Helper functions for implementing driver backend */ 85 int usbip_generic_driver_open(struct usbip_host_driver *hdriver); 86 void usbip_generic_driver_close(struct usbip_host_driver *hdriver); 87 int usbip_generic_refresh_device_list(struct usbip_host_driver *hdriver); 88 int usbip_export_device(struct usbip_exported_device *edev, int sockfd); 89 struct usbip_exported_device *usbip_generic_get_device( 90 struct usbip_host_driver *hdriver, int num); 91 92 #endif /* __USBIP_HOST_COMMON_H */ 93