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 38 bus_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 42 int _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 46 int _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 50 int _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 54 void _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_ */ 59