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usb_mem.h revision 1.36 
      1 /*	$NetBSD: usb_mem.h,v 1.36 2022/02/14 09:23:32 riastradh 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 #ifndef	_DEV_USB_USB_MEM_H_
     35 #define	_DEV_USB_USB_MEM_H_
     36 
     37 typedef struct usb_dma_block {
     38 	bus_dma_tag_t tag;
     39 	bus_dmamap_t map;
     40 	void *kaddr;
     41 	bus_dma_segment_t *segs;
     42 	int nsegs;
     43 	int nsegs_alloc;
     44 	size_t size;
     45 	size_t align;
     46 	int flags;
     47 #define USB_DMA_FULLBLOCK	__BIT(0)
     48 #define USB_DMA_COHERENT	__BIT(1)
     49 
     50 	LIST_ENTRY(usb_dma_block) next;
     51 } usb_dma_block_t;
     52 
     53 #define USBMALLOC_MULTISEG	__BIT(0)
     54 #define USBMALLOC_COHERENT	__BIT(1)
     55 #define USBMALLOC_ZERO		__BIT(2)
     56 
     57 int		usb_allocmem(bus_dma_tag_t, size_t, size_t, u_int, usb_dma_t *);
     58 void		usb_freemem(usb_dma_t *);
     59 void		usb_syncmem(usb_dma_t *, bus_addr_t, bus_size_t, int);
     60 
     61 bus_addr_t	usb_dmaaddr(usb_dma_t *, unsigned int);
     62 
     63 #define DMAADDR(dma, o)	usb_dmaaddr((dma), (o))
     64 #define KERNADDR(dma, o) \
     65 	((void *)((char *)(dma)->udma_block->kaddr + (dma)->udma_offs + (o)))
     66 
     67 #endif	/* _DEV_USB_USB_MEM_H_ */
     68