xref: /freebsd/sys/dev/usb/usb_process.h (revision f5f7c05209ca2c3748fd8b27c5e80ffad49120eb)
1 /* $FreeBSD$ */
2 /*-
3  * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  */
26 
27 #ifndef _USB_PROCESS_H_
28 #define	_USB_PROCESS_H_
29 
30 #ifndef USB_GLOBAL_INCLUDE_FILE
31 #include <sys/interrupt.h>
32 #include <sys/priority.h>
33 #include <sys/runq.h>
34 #endif
35 
36 /* defines */
37 #define	USB_PRI_HIGH	PI_SWI(SWI_NET)
38 #define	USB_PRI_MED	PI_SWI(SWI_CAMBIO)
39 
40 #define	USB_PROC_WAIT_TIMEOUT 2
41 #define	USB_PROC_WAIT_DRAIN   1
42 #define	USB_PROC_WAIT_NORMAL  0
43 
44 /* structure prototypes */
45 
46 struct usb_proc_msg;
47 
48 /*
49  * The following structure defines the USB process.
50  */
51 struct usb_process {
52 	TAILQ_HEAD(, usb_proc_msg) up_qhead;
53 	struct cv up_cv;
54 	struct cv up_drain;
55 
56 #if (__FreeBSD_version >= 800000)
57 	struct thread *up_ptr;
58 #else
59 	struct proc *up_ptr;
60 #endif
61 	struct thread *up_curtd;
62 	struct mtx *up_mtx;
63 
64 	usb_size_t up_msg_num;
65 
66 	uint8_t	up_prio;
67 	uint8_t	up_gone;
68 	uint8_t	up_msleep;
69 	uint8_t	up_csleep;
70 	uint8_t	up_dsleep;
71 };
72 
73 /* prototypes */
74 
75 uint8_t	usb_proc_is_gone(struct usb_process *up);
76 int	usb_proc_create(struct usb_process *up, struct mtx *p_mtx,
77 	    const char *pmesg, uint8_t prio);
78 void	usb_proc_drain(struct usb_process *up);
79 void	usb_proc_mwait(struct usb_process *up, void *pm0, void *pm1);
80 void	usb_proc_free(struct usb_process *up);
81 void   *usb_proc_msignal(struct usb_process *up, void *pm0, void *pm1);
82 void	usb_proc_rewakeup(struct usb_process *up);
83 
84 #endif					/* _USB_PROCESS_H_ */
85