summaryrefslogtreecommitdiff
path: root/drivers/staging/usbip/stub.h
blob: 6592aa2ad15cacaf3b76c3370b0caf7bb0b52bb4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
/*
 * Copyright (C) 2003-2008 Takahiro Hirofuchi
 *
 * This is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
 * USA.
 */

#include <linux/list.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/usb.h>
#include <linux/wait.h>

#define STUB_BUSID_OTHER 0
#define STUB_BUSID_REMOV 1
#define STUB_BUSID_ADDED 2
#define STUB_BUSID_ALLOC 3

struct stub_device {
	struct usb_interface *interface;
	struct usb_device *udev;
	struct list_head list;

	struct usbip_device ud;
	__u32 devid;

	/*
	 * stub_priv preserves private data of each urb.
	 * It is allocated as stub_priv_cache and assigned to urb->context.
	 *
	 * stub_priv is always linked to any one of 3 lists;
	 *	priv_init: linked to this until the comletion of a urb.
	 *	priv_tx  : linked to this after the completion of a urb.
	 *	priv_free: linked to this after the sending of the result.
	 *
	 * Any of these list operations should be locked by priv_lock.
	 */
	spinlock_t priv_lock;
	struct list_head priv_init;
	struct list_head priv_tx;
	struct list_head priv_free;

	/* see comments for unlinking in stub_rx.c */
	struct list_head unlink_tx;
	struct list_head unlink_free;

	wait_queue_head_t tx_waitq;
};

/* private data into urb->priv */
struct stub_priv {
	unsigned long seqnum;
	struct list_head list;
	struct stub_device *sdev;
	struct urb *urb;

	int unlinking;
};

struct stub_unlink {
	unsigned long seqnum;
	struct list_head list;
	__u32 status;
};

#define BUSID_SIZE 20
struct bus_id_priv {
	char name[BUSID_SIZE];
	char status;
	int interf_count;
	struct stub_device *sdev;
	char shutdown_busid;
};

/* stub_priv is allocated from stub_priv_cache */
extern struct kmem_cache *stub_priv_cache;

/* stub_dev.c */
extern struct usb_driver stub_driver;

/* stub_main.c */
struct bus_id_priv *get_busid_priv(const char *busid);
int del_match_busid(char *busid);
void stub_device_cleanup_urbs(struct stub_device *sdev);

/* stub_rx.c */
int stub_rx_loop(void *data);

/* stub_tx.c */
void stub_enqueue_ret_unlink(struct stub_device *sdev, __u32 seqnum,
			     __u32 status);
void stub_complete(struct urb *urb);
int stub_tx_loop(void *data);