2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2017 Jason A. Harmening.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
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25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #ifndef _BUS_DMA_INTERNAL_H_
32 #define _BUS_DMA_INTERNAL_H_
35 * The following functions define the interface between the MD and MI
36 * busdma layers. These are not intended for consumption by driver
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);
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);
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);
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);
56 void _bus_dmamap_waitok(bus_dma_tag_t dmat, bus_dmamap_t map,
57 struct memdesc *mem, bus_dmamap_callback_t *callback,
60 #endif /* !_BUS_DMA_INTERNAL_H_ */