1 /*- 2 * Copyright (c) 2013 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Konstantin Belousov <kib@FreeBSD.org> 6 * under sponsorship from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #ifndef _MACHINE_BUS_DMA_IMPL_H_ 33 #define _MACHINE_BUS_DMA_IMPL_H_ 34 35 struct bus_dma_tag_common { 36 struct bus_dma_impl *impl; 37 struct bus_dma_tag_common *parent; 38 bus_size_t alignment; 39 bus_addr_t boundary; 40 bus_addr_t lowaddr; 41 bus_addr_t highaddr; 42 bus_dma_filter_t *filter; 43 void *filterarg; 44 bus_size_t maxsize; 45 u_int nsegments; 46 bus_size_t maxsegsz; 47 int flags; 48 bus_dma_lock_t *lockfunc; 49 void *lockfuncarg; 50 int ref_count; 51 }; 52 53 struct bus_dma_impl { 54 int (*tag_create)(bus_dma_tag_t parent, 55 bus_size_t alignment, bus_addr_t boundary, bus_addr_t lowaddr, 56 bus_addr_t highaddr, bus_dma_filter_t *filter, 57 void *filterarg, bus_size_t maxsize, int nsegments, 58 bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc, 59 void *lockfuncarg, bus_dma_tag_t *dmat); 60 int (*tag_destroy)(bus_dma_tag_t dmat); 61 int (*map_create)(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp); 62 int (*map_destroy)(bus_dma_tag_t dmat, bus_dmamap_t map); 63 int (*mem_alloc)(bus_dma_tag_t dmat, void** vaddr, int flags, 64 bus_dmamap_t *mapp); 65 void (*mem_free)(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map); 66 int (*load_ma)(bus_dma_tag_t dmat, bus_dmamap_t map, 67 struct vm_page **ma, bus_size_t tlen, int ma_offs, int flags, 68 bus_dma_segment_t *segs, int *segp); 69 int (*load_phys)(bus_dma_tag_t dmat, bus_dmamap_t map, 70 vm_paddr_t buf, bus_size_t buflen, int flags, 71 bus_dma_segment_t *segs, int *segp); 72 int (*load_buffer)(bus_dma_tag_t dmat, bus_dmamap_t map, 73 void *buf, bus_size_t buflen, pmap_t pmap, int flags, 74 bus_dma_segment_t *segs, int *segp); 75 void (*map_waitok)(bus_dma_tag_t dmat, bus_dmamap_t map, 76 struct memdesc *mem, bus_dmamap_callback_t *callback, 77 void *callback_arg); 78 bus_dma_segment_t *(*map_complete)(bus_dma_tag_t dmat, bus_dmamap_t map, 79 bus_dma_segment_t *segs, int nsegs, int error); 80 void (*map_unload)(bus_dma_tag_t dmat, bus_dmamap_t map); 81 void (*map_sync)(bus_dma_tag_t dmat, bus_dmamap_t map, 82 bus_dmasync_op_t op); 83 }; 84 85 void bus_dma_dflt_lock(void *arg, bus_dma_lock_op_t op); 86 int bus_dma_run_filter(struct bus_dma_tag_common *dmat, bus_addr_t paddr); 87 int common_bus_dma_tag_create(struct bus_dma_tag_common *parent, 88 bus_size_t alignment, 89 bus_addr_t boundary, bus_addr_t lowaddr, bus_addr_t highaddr, 90 bus_dma_filter_t *filter, void *filterarg, bus_size_t maxsize, 91 int nsegments, bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc, 92 void *lockfuncarg, size_t sz, void **dmat); 93 94 extern struct bus_dma_impl bus_dma_bounce_impl; 95 96 #endif 97