FreeBSD/Linux Kernel Cross Reference
sys/dev/usb/usb_process.h

     /* $FreeBSD$ */
     /*-
      * 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_ */

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