sys/dev/usb/usb_mem.h

   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@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 void            usb_syncmem(usb_dma_t *, bus_addr_t, bus_size_t, int ops);
  56
  57 #ifdef __NetBSD__
  58 struct extent;
  59
  60 struct usb_dma_reserve {
  61         bus_dma_tag_t dtag;
  62         bus_dmamap_t map;
  63         void *vaddr;
  64         bus_addr_t paddr;
  65         size_t size;
  66         struct extent *extent;
  67         device_t dv;
  68 };
  69
  70 #if defined(_KERNEL_OPT)
  71 #include "opt_usb_mem_reserve.h"
  72 #endif
  73
  74 #ifndef USB_MEM_RESERVE
  75 #define USB_MEM_RESERVE (256 * 1024)
  76 #endif
  77
  78 usbd_status usb_reserve_allocm(struct usb_dma_reserve *, usb_dma_t *,
  79                                 u_int32_t);
  80 int usb_setup_reserve(device_t, struct usb_dma_reserve *, bus_dma_tag_t, size_t);
  81 void usb_reserve_freem(struct usb_dma_reserve *, usb_dma_t *);
  82
  83 #endif
  84
  85 #elif defined(__FreeBSD__)
  86
  87 /*
  88  * FreeBSD does not have special functions for DMA memory, so let's keep it
  89  * simple for now.
  90  */
  91
  92 #include <sys/param.h>
  93 #include <sys/systm.h>
  94 #include <sys/queue.h>
  95 #include <sys/proc.h>
  96 #include <sys/bio.h>
  97 #include <sys/buf.h>
  98 #include <sys/malloc.h>
  99 #include <sys/kernel.h>
 100 #include <vm/vm.h>
 101 #include <vm/pmap.h>
 102
 103 #include <machine/pmap.h>       /* for vtophys */
 104
 105 #define         usb_allocmem(t,s,a,p)   (*(p) = malloc(s, M_USB, M_NOWAIT), (*(p) == NULL? USBD_NOMEM: USBD_NORMAL_COMPLETION))
 106 #define         usb_freemem(t,p)        (free(*(p), M_USB))
 107
 108 #ifdef __alpha__
 109 #define DMAADDR(dma, o) (alpha_XXX_dmamap((vm_offset_t) *(dma) + (o)))
 110 #else
 111 #define DMAADDR(dma, o) (vtophys(*(dma) + (o)))
 112 #endif
 113 #define KERNADDR(dma, o)        ((void *) ((char *)*(dma) + (o)))
 114 #endif /* __FreeBSD__ */
 115