tools/usb/usbip/libsrc/usbip_host_common.h

   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 */