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usb_mem.h revision 1.28 
      1 /*	$NetBSD: usb_mem.h,v 1.28 2012/02/24 06:48:28 mrg 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 typedef struct usb_dma_block {
     35 	bus_dma_tag_t tag;
     36 	bus_dmamap_t map;
     37         void *kaddr;
     38         bus_dma_segment_t segs[1];
     39         int nsegs;
     40         size_t size;
     41         size_t align;
     42 	int flags;
     43 #define USB_DMA_FULLBLOCK	0x0001
     44 #define USB_DMA_RESERVE		0x0002
     45 	LIST_ENTRY(usb_dma_block) next;
     46 } usb_dma_block_t;
     47 
     48 #define DMAADDR(dma, o) ((dma)->block->map->dm_segs[0].ds_addr + (dma)->offs + (o))
     49 #define KERNADDR(dma, o) \
     50 	((void *)((char *)(dma)->block->kaddr + (dma)->offs + (o)))
     51 
     52 usbd_status	usb_allocmem(usbd_bus_handle,size_t,size_t, usb_dma_t *);
     53 void		usb_freemem(usbd_bus_handle, usb_dma_t *);
     54 void		usb_syncmem(usb_dma_t *, bus_addr_t, bus_size_t, int ops);
     55 
     56 struct extent;
     57 
     58 struct usb_dma_reserve {
     59 	bus_dma_tag_t dtag;
     60 	bus_dmamap_t map;
     61 	void *vaddr;
     62 	bus_addr_t paddr;
     63 	size_t size;
     64 	struct extent *extent;
     65 	device_t dv;
     66 };
     67 
     68 #if defined(_KERNEL_OPT)
     69 #include "opt_usb_mem_reserve.h"
     70 #endif
     71 
     72 #ifndef USB_MEM_RESERVE
     73 #define USB_MEM_RESERVE (256 * 1024)
     74 #endif
     75 
     76 usbd_status usb_reserve_allocm(struct usb_dma_reserve *, usb_dma_t *,
     77 				u_int32_t);
     78 int usb_setup_reserve(device_t, struct usb_dma_reserve *, bus_dma_tag_t, size_t);
     79 void usb_reserve_freem(struct usb_dma_reserve *, usb_dma_t *);
     80