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usb_mem.h revision 1.21 
      1 /*	$NetBSD: usb_mem.h,v 1.21 2004/12/21 16:41:24 fvdl Exp $	*/
      2 /*	$FreeBSD: src/sys/dev/usb/usb_mem.h,v 1.9 1999/11/17 22:33:47 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 (lennart (at) augustsson.net) 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 flags;
     51 #define USB_DMA_FULLBLOCK	0x0001
     52 #define USB_DMA_RESERVE		0x0002
     53 	LIST_ENTRY(usb_dma_block) next;
     54 } usb_dma_block_t;
     55 
     56 #define DMAADDR(dma, o) ((dma)->block->map->dm_segs[0].ds_addr + (dma)->offs + (o))
     57 #define KERNADDR(dma, o) \
     58 	((void *)((char *)((dma)->block->kaddr + (dma)->offs) + (o)))
     59 
     60 usbd_status	usb_allocmem(usbd_bus_handle,size_t,size_t, usb_dma_t *);
     61 void		usb_freemem(usbd_bus_handle, usb_dma_t *);
     62 
     63 #ifdef __NetBSD__
     64 struct extent;
     65 
     66 struct usb_dma_reserve {
     67 	bus_dma_tag_t dtag;
     68 	bus_dmamap_t map;
     69 	caddr_t vaddr;
     70 	bus_addr_t paddr;
     71 	size_t size;
     72 	struct extent *extent;
     73 	void *softc;
     74 };
     75 
     76 #if defined(_KERNEL_OPT)
     77 #include "opt_usb_mem_reserve.h"
     78 #endif
     79 
     80 #ifndef USB_MEM_RESERVE
     81 #define USB_MEM_RESERVE (256 * 1024 * 1024)
     82 #endif
     83 
     84 usbd_status usb_reserve_allocm(struct usb_dma_reserve *, usb_dma_t *,
     85 				u_int32_t);
     86 int usb_setup_reserve(void *, struct usb_dma_reserve *, bus_dma_tag_t, size_t);
     87 void usb_reserve_freem(struct usb_dma_reserve *, usb_dma_t *);
     88 
     89 #endif
     90 
     91 #elif defined(__FreeBSD__)
     92 
     93 /*
     94  * FreeBSD does not have special functions for DMA memory, so let's keep it
     95  * simple for now.
     96  */
     97 
     98 #include <sys/param.h>
     99 #include <sys/systm.h>
    100 #include <sys/queue.h>
    101 #include <sys/proc.h>
    102 #include <sys/bio.h>
    103 #include <sys/buf.h>
    104 #include <sys/malloc.h>
    105 #include <sys/kernel.h>
    106 #include <vm/vm.h>
    107 #include <vm/pmap.h>
    108 
    109 #include <machine/pmap.h>       /* for vtophys */
    110 
    111 #define		usb_allocmem(t,s,a,p)	(*(p) = malloc(s, M_USB, M_NOWAIT), (*(p) == NULL? USBD_NOMEM: USBD_NORMAL_COMPLETION))
    112 #define		usb_freemem(t,p)	(free(*(p), M_USB))
    113 
    114 #ifdef __alpha__
    115 #define DMAADDR(dma, o)	(alpha_XXX_dmamap((vm_offset_t) *(dma) + (o)))
    116 #else
    117 #define DMAADDR(dma, o)	(vtophys(*(dma) + (o)))
    118 #endif
    119 #define KERNADDR(dma, o)	((void *) ((char *)*(dma) + (o)))
    120 #endif /* __FreeBSD__ */
    121 
    122