tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2003-2008 Takahiro Hirofuchi
3 *
4 * This is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 */
10
11#include <linux/device.h>
12#include <linux/list.h>
13#include <linux/spinlock.h>
14#include <linux/sysfs.h>
15#include <linux/types.h>
16#include <linux/usb.h>
17#include <linux/usb/hcd.h>
18#include <linux/wait.h>
19
20struct vhci_device {
21 struct usb_device *udev;
22
23 /*
24 * devid specifies a remote usb device uniquely instead
25 * of combination of busnum and devnum.
26 */
27 __u32 devid;
28
29 /* speed of a remote device */
30 enum usb_device_speed speed;
31
32 /* vhci root-hub port to which this device is attached */
33 __u32 rhport;
34
35 struct usbip_device ud;
36
37 /* lock for the below link lists */
38 spinlock_t priv_lock;
39
40 /* vhci_priv is linked to one of them. */
41 struct list_head priv_tx;
42 struct list_head priv_rx;
43
44 /* vhci_unlink is linked to one of them */
45 struct list_head unlink_tx;
46 struct list_head unlink_rx;
47
48 /* vhci_tx thread sleeps for this queue */
49 wait_queue_head_t waitq_tx;
50};
51
52/* urb->hcpriv, use container_of() */
53struct vhci_priv {
54 unsigned long seqnum;
55 struct list_head list;
56
57 struct vhci_device *vdev;
58 struct urb *urb;
59};
60
61struct vhci_unlink {
62 /* seqnum of this request */
63 unsigned long seqnum;
64
65 struct list_head list;
66
67 /* seqnum of the unlink target */
68 unsigned long unlink_seqnum;
69};
70
71/*
72 * The number of ports is less than 16 ?
73 * USB_MAXCHILDREN is statically defined to 16 in usb.h. Its maximum value
74 * would be 31 because the event_bits[1] of struct usb_hub is defined as
75 * unsigned long in hub.h
76 */
77#define VHCI_NPORTS 8
78
79/* for usb_bus.hcpriv */
80struct vhci_hcd {
81 spinlock_t lock;
82
83 u32 port_status[VHCI_NPORTS];
84
85 unsigned resuming:1;
86 unsigned long re_timeout;
87
88 atomic_t seqnum;
89
90 /*
91 * NOTE:
92 * wIndex shows the port number and begins from 1.
93 * But, the index of this array begins from 0.
94 */
95 struct vhci_device vdev[VHCI_NPORTS];
96};
97
98extern struct vhci_hcd *the_controller;
99extern const struct attribute_group dev_attr_group;
100#define hardware (&the_controller->pdev.dev)
101
102/* vhci_hcd.c */
103void rh_port_connect(int rhport, enum usb_device_speed speed);
104void rh_port_disconnect(int rhport);
105
106/* vhci_rx.c */
107struct urb *pickup_urb_and_free_priv(struct vhci_device *vdev, __u32 seqnum);
108int vhci_rx_loop(void *data);
109
110/* vhci_tx.c */
111int vhci_tx_loop(void *data);
112
113static inline struct vhci_device *port_to_vdev(__u32 port)
114{
115 return &the_controller->vdev[port];
116}
117
118static inline struct vhci_hcd *hcd_to_vhci(struct usb_hcd *hcd)
119{
120 return (struct vhci_hcd *) (hcd->hcd_priv);
121}
122
123static inline struct usb_hcd *vhci_to_hcd(struct vhci_hcd *vhci)
124{
125 return container_of((void *) vhci, struct usb_hcd, hcd_priv);
126}
127
128static inline struct device *vhci_dev(struct vhci_hcd *vhci)
129{
130 return vhci_to_hcd(vhci)->self.controller;
131}