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usb_mem.h revision 1.9 
      1 /*	$NetBSD: usb_mem.h,v 1.9 1999/10/13 08:10:58 augustss Exp $	*/
      2 /*	$FreeBSD: src/sys/dev/usb/usb_mem.h,v 1.8 1999/10/07 19:26:34 n_hibma Exp $ */
      3 
      4 /*
      5  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      6  * All rights reserved.
      7  *
      8  * This code is derived from software contributed to The NetBSD Foundation
      9  * by Lennart Augustsson (augustss (at) carlstedt.se) at
     10  * Carlstedt Research & Technology.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. All advertising materials mentioning features or use of this software
     21  *    must display the following acknowledgement:
     22  *        This product includes software developed by the NetBSD
     23  *        Foundation, Inc. and its contributors.
     24  * 4. Neither the name of The NetBSD Foundation nor the names of its
     25  *    contributors may be used to endorse or promote products derived
     26  *    from this software without specific prior written permission.
     27  *
     28  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     29  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     30  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     31  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     32  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     33  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     34  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     35  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     36  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     37  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     38  * POSSIBILITY OF SUCH DAMAGE.
     39  */
     40 
     41 #if defined(__NetBSD__) || defined(__OpenBSD__)
     42 typedef struct usb_dma_block {
     43 	bus_dma_tag_t tag;
     44 	bus_dmamap_t map;
     45         caddr_t kaddr;
     46         bus_dma_segment_t segs[1];
     47         int nsegs;
     48         size_t size;
     49         size_t align;
     50 	int fullblock;
     51 	LIST_ENTRY(usb_dma_block) next;
     52 } usb_dma_block_t;
     53 
     54 #define DMAADDR(dma) ((dma)->block->segs[0].ds_addr + (dma)->offs)
     55 #define KERNADDR(dma) ((void *)((dma)->block->kaddr + (dma)->offs))
     56 
     57 usbd_status	usb_allocmem __P((usbd_bus_handle,size_t,size_t, usb_dma_t *));
     58 void		usb_freemem  __P((usbd_bus_handle, usb_dma_t *));
     59 
     60 #elif defined(__FreeBSD__)
     61 
     62 /*
     63  * FreeBSD does not have special functions for dma memory, so let's keep it
     64  * simple for now.
     65  */
     66 
     67 #include <sys/param.h>
     68 #include <sys/systm.h>
     69 #include <sys/queue.h>
     70 #include <sys/proc.h>
     71 #include <sys/buf.h>
     72 #include <sys/malloc.h>
     73 #include <sys/kernel.h>
     74 #include <vm/vm.h>
     75 #include <vm/pmap.h>
     76 
     77 #include <machine/pmap.h>       /* for vtophys */
     78 
     79 #define		usb_allocmem(t,s,a,p)	(*(p) = malloc(s, M_USB, M_NOWAIT), (*(p) == NULL? USBD_NOMEM: USBD_NORMAL_COMPLETION))
     80 #define		usb_freemem(t,p)	(free(*(p), M_USB))
     81 
     82 #ifdef __alpha__
     83 #define DMAADDR(dma)	(alpha_XXX_dmamap((vm_offset_t) *(dma)))
     84 #else
     85 #define DMAADDR(dma)	(vtophys(*(dma)))
     86 #endif
     87 #define KERNADDR(dma)	((void *) *(dma))
     88 #endif
     89 
     90