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usb_mem.h revision 1.1 
      1 /*	$NetBSD: usb_mem.h,v 1.1 1998/07/24 21:09:08 augustss Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Author: Lennart Augustsson <augustss (at) carlstedt.se>
      8  *         Carlstedt Research & Technology
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 typedef struct usb_block_dma {
     40 	bus_dma_tag_t tag;
     41 	bus_dmamap_t map;
     42         caddr_t kaddr;
     43         bus_dma_segment_t segs[1];
     44         int nsegs;
     45         size_t size;
     46         size_t align;
     47 	int fullblock;
     48 	LIST_ENTRY(usb_block_dma) next;
     49 } usb_dma_block_t;
     50 
     51 typedef struct {
     52 	usb_dma_block_t *block;
     53 	u_int offs;
     54 } usb_dma_t;
     55 
     56 #define DMAADDR(dma) ((dma)->block->segs[0].ds_addr + (dma)->offs)
     57 #define KERNADDR(dma) ((void *)((dma)->block->kaddr + (dma)->offs))
     58 
     59 usbd_status	usb_allocmem __P((bus_dma_tag_t, size_t, size_t, usb_dma_t *));
     60 void		usb_freemem  __P((bus_dma_tag_t, usb_dma_t *));
     61