1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
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
29#ifndef _BUS_DMA_INTERNAL_H_
30#define _BUS_DMA_INTERNAL_H_
31
32/*
33 * The following functions define the interface between the MD and MI
34 * busdma layers. These are not intended for consumption by driver
35 * software.
36 */
37
38bus_dma_segment_t *_bus_dmamap_complete(bus_dma_tag_t dmat,
39 bus_dmamap_t map, bus_dma_segment_t *segs,
40 int nsegs, int error);
41
42int _bus_dmamap_load_buffer(bus_dma_tag_t dmat, bus_dmamap_t map,
43 void *buf, bus_size_t buflen, struct pmap *pmap,
44 int flags, bus_dma_segment_t *segs, int *segp);
45
46int _bus_dmamap_load_ma(bus_dma_tag_t dmat, bus_dmamap_t map,
47 struct vm_page **ma, bus_size_t tlen, int ma_offs,
48 int flags, bus_dma_segment_t *segs, int *segp);
49
50int _bus_dmamap_load_phys(bus_dma_tag_t dmat, bus_dmamap_t map,
51 vm_paddr_t paddr, bus_size_t buflen,
52 int flags, bus_dma_segment_t *segs, int *segp);
53
54void _bus_dmamap_waitok(bus_dma_tag_t dmat, bus_dmamap_t map,
55 struct memdesc *mem, bus_dmamap_callback_t *callback,
56 void *callback_arg);
57
58#endif /* !_BUS_DMA_INTERNAL_H_ */