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usb_mem.h revision 1.26 
      1 /*	$NetBSD: usb_mem.h,v 1.26 2008/05/21 17:19:44 drochner 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  *
     21  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     23  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     31  * POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #if defined(__NetBSD__) || defined(__OpenBSD__)
     35 typedef struct usb_dma_block {
     36 	bus_dma_tag_t tag;
     37 	bus_dmamap_t map;
     38         void *kaddr;
     39         bus_dma_segment_t segs[1];
     40         int nsegs;
     41         size_t size;
     42         size_t align;
     43 	int flags;
     44 #define USB_DMA_FULLBLOCK	0x0001
     45 #define USB_DMA_RESERVE		0x0002
     46 	LIST_ENTRY(usb_dma_block) next;
     47 } usb_dma_block_t;
     48 
     49 #define DMAADDR(dma, o) ((dma)->block->map->dm_segs[0].ds_addr + (dma)->offs + (o))
     50 #define KERNADDR(dma, o) \
     51 	((void *)((char *)(dma)->block->kaddr + (dma)->offs + (o)))
     52 
     53 usbd_status	usb_allocmem(usbd_bus_handle,size_t,size_t, usb_dma_t *);
     54 void		usb_freemem(usbd_bus_handle, usb_dma_t *);
     55 
     56 #ifdef __NetBSD__
     57 struct extent;
     58 
     59 struct usb_dma_reserve {
     60 	bus_dma_tag_t dtag;
     61 	bus_dmamap_t map;
     62 	void *vaddr;
     63 	bus_addr_t paddr;
     64 	size_t size;
     65 	struct extent *extent;
     66 	device_t dv;
     67 };
     68 
     69 #if defined(_KERNEL_OPT)
     70 #include "opt_usb_mem_reserve.h"
     71 #endif
     72 
     73 #ifndef USB_MEM_RESERVE
     74 #define USB_MEM_RESERVE (256 * 1024)
     75 #endif
     76 
     77 usbd_status usb_reserve_allocm(struct usb_dma_reserve *, usb_dma_t *,
     78 				u_int32_t);
     79 int usb_setup_reserve(device_t, struct usb_dma_reserve *, bus_dma_tag_t, size_t);
     80 void usb_reserve_freem(struct usb_dma_reserve *, usb_dma_t *);
     81 
     82 #endif
     83 
     84 #elif defined(__FreeBSD__)
     85 
     86 /*
     87  * FreeBSD does not have special functions for DMA memory, so let's keep it
     88  * simple for now.
     89  */
     90 
     91 #include <sys/param.h>
     92 #include <sys/systm.h>
     93 #include <sys/queue.h>
     94 #include <sys/proc.h>
     95 #include <sys/bio.h>
     96 #include <sys/buf.h>
     97 #include <sys/malloc.h>
     98 #include <sys/kernel.h>
     99 #include <vm/vm.h>
    100 #include <vm/pmap.h>
    101 
    102 #include <machine/pmap.h>       /* for vtophys */
    103 
    104 #define		usb_allocmem(t,s,a,p)	(*(p) = malloc(s, M_USB, M_NOWAIT), (*(p) == NULL? USBD_NOMEM: USBD_NORMAL_COMPLETION))
    105 #define		usb_freemem(t,p)	(free(*(p), M_USB))
    106 
    107 #ifdef __alpha__
    108 #define DMAADDR(dma, o)	(alpha_XXX_dmamap((vm_offset_t) *(dma) + (o)))
    109 #else
    110 #define DMAADDR(dma, o)	(vtophys(*(dma) + (o)))
    111 #endif
    112 #define KERNADDR(dma, o)	((void *) ((char *)*(dma) + (o)))
    113 #endif /* __FreeBSD__ */
    114 
    115