1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2017 Jason A. Harmening. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _BUS_DMA_INTERNAL_H_ 32 #define _BUS_DMA_INTERNAL_H_ 33 34 /* 35 * The following functions define the interface between the MD and MI 36 * busdma layers. These are not intended for consumption by driver 37 * software. 38 */ 39 40 bus_dma_segment_t *_bus_dmamap_complete(bus_dma_tag_t dmat, 41 bus_dmamap_t map, bus_dma_segment_t *segs, 42 int nsegs, int error); 43 44 int _bus_dmamap_load_buffer(bus_dma_tag_t dmat, bus_dmamap_t map, 45 void *buf, bus_size_t buflen, struct pmap *pmap, 46 int flags, bus_dma_segment_t *segs, int *segp); 47 48 int _bus_dmamap_load_ma(bus_dma_tag_t dmat, bus_dmamap_t map, 49 struct vm_page **ma, bus_size_t tlen, int ma_offs, 50 int flags, bus_dma_segment_t *segs, int *segp); 51 52 int _bus_dmamap_load_phys(bus_dma_tag_t dmat, bus_dmamap_t map, 53 vm_paddr_t paddr, bus_size_t buflen, 54 int flags, bus_dma_segment_t *segs, int *segp); 55 56 void _bus_dmamap_waitok(bus_dma_tag_t dmat, bus_dmamap_t map, 57 struct memdesc *mem, bus_dmamap_callback_t *callback, 58 void *callback_arg); 59 60 #endif /* !_BUS_DMA_INTERNAL_H_ */ 61 62