usb_process.h

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/* $FreeBSD$ */
/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
 
#ifndef _USB_PROCESS_H_
#define _USB_PROCESS_H_
 
#ifndef USB_GLOBAL_INCLUDE_FILE
#include <sys/interrupt.h>
#include <sys/priority.h>
#include <sys/runq.h>
#endif
 
/* defines */
#define USB_PRI_HIGHEST PI_SWI(SWI_TTY)
#define USB_PRI_HIGH    PI_SWI(SWI_NET)
#define USB_PRI_MED     PI_SWI(SWI_CAMBIO)
 
#define USB_PROC_WAIT_TIMEOUT 2
#define USB_PROC_WAIT_DRAIN   1
#define USB_PROC_WAIT_NORMAL  0
 
/* structure prototypes */
 
struct usb_proc_msg;
struct usb_device;
 
/*
 * The following structure defines the USB process.
 */
struct usb_process {
        TAILQ_HEAD(, usb_proc_msg) up_qhead;
        struct cv up_cv;
        struct cv up_drain;
 
#if (__FreeBSD_version >= 800000)
        struct thread *up_ptr;
#else
        struct proc *up_ptr;
#endif
        struct thread *up_curtd;
        struct mtx *up_mtx;
 
        usb_size_t up_msg_num;
 
        uint8_t up_prio;
        uint8_t up_gone;
        uint8_t up_msleep;
        uint8_t up_csleep;
        uint8_t up_dsleep;
};
 
/* prototypes */
 
uint8_t usb_proc_is_gone(struct usb_process *up);
int     usb_proc_create(struct usb_process *up, struct mtx *p_mtx,
            const char *pmesg, uint8_t prio);
void    usb_proc_drain(struct usb_process *up);
void    usb_proc_mwait(struct usb_process *up, void *pm0, void *pm1);
void    usb_proc_free(struct usb_process *up);
void   *usb_proc_msignal(struct usb_process *up, void *pm0, void *pm1);
void    usb_proc_rewakeup(struct usb_process *up);
int     usb_proc_is_called_from(struct usb_process *up);
 
void    usb_proc_explore_mwait(struct usb_device *, void *, void *);
void   *usb_proc_explore_msignal(struct usb_device *, void *, void *);
void    usb_proc_explore_lock(struct usb_device *);
void    usb_proc_explore_unlock(struct usb_device *);
 
#endif                                  /* _USB_PROCESS_H_ */