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

     /*      $NetBSD: usb_mem.h,v 1.18 2002/05/28 17:45:17 augustss Exp $    */
     /*      $FreeBSD: releng/7.3/sys/dev/usb/usb_mem.h 170656 2007-06-13 05:45:48Z imp $    */
     
     /*-
      * Copyright (c) 1998 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Lennart Augustsson (lennart@augustsson.net) at
     * Carlstedt Research & Technology.
     *
     * 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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *        This product includes software developed by the NetBSD
     *        Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
     */
    
    typedef struct usb_dma_block {
            bus_dma_tag_t tag;
            bus_dmamap_t map;
            void *kaddr;
            bus_dma_segment_t segs[1];
            int nsegs;
            size_t size;
            size_t align;
            int fullblock;
            LIST_ENTRY(usb_dma_block) next;
    } usb_dma_block_t;
    
    #define DMAADDR(dma, o) ((dma)->block->segs[0].ds_addr + (dma)->offs + (o))
    #define KERNADDR(dma, o) \
            ((void *)((char *)((dma)->block->kaddr) + (dma)->offs + (o)))
    
    usbd_status     usb_allocmem(usbd_bus_handle,size_t,size_t, usb_dma_t *);
    void            usb_freemem(usbd_bus_handle, usb_dma_t *);

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