1 /*- 2 * Copyright (c) 2013 The FreeBSD Foundation 3 * 4 * This software was developed by Konstantin Belousov <kib@FreeBSD.org> 5 * under sponsorship from the FreeBSD Foundation. 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 _MACHINE_BUS_DMA_IMPL_H_ 32 #define _MACHINE_BUS_DMA_IMPL_H_ 33 34 struct bus_dma_tag_common { 35 struct bus_dma_impl *impl; 36 struct bus_dma_tag_common *parent; 37 bus_size_t alignment; 38 bus_addr_t boundary; 39 bus_addr_t lowaddr; 40 bus_addr_t highaddr; 41 bus_dma_filter_t *filter; 42 void *filterarg; 43 bus_size_t maxsize; 44 u_int nsegments; 45 bus_size_t maxsegsz; 46 int flags; 47 bus_dma_lock_t *lockfunc; 48 void *lockfuncarg; 49 int ref_count; 50 }; 51 52 struct bus_dma_impl { 53 int (*tag_create)(bus_dma_tag_t parent, 54 bus_size_t alignment, bus_addr_t boundary, bus_addr_t lowaddr, 55 bus_addr_t highaddr, bus_dma_filter_t *filter, 56 void *filterarg, bus_size_t maxsize, int nsegments, 57 bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc, 58 void *lockfuncarg, bus_dma_tag_t *dmat); 59 int (*tag_destroy)(bus_dma_tag_t dmat); 60 int (*map_create)(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp); 61 int (*map_destroy)(bus_dma_tag_t dmat, bus_dmamap_t map); 62 int (*mem_alloc)(bus_dma_tag_t dmat, void** vaddr, int flags, 63 bus_dmamap_t *mapp); 64 void (*mem_free)(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map); 65 int (*load_ma)(bus_dma_tag_t dmat, bus_dmamap_t map, 66 struct vm_page **ma, bus_size_t tlen, int ma_offs, int flags, 67 bus_dma_segment_t *segs, int *segp); 68 int (*load_phys)(bus_dma_tag_t dmat, bus_dmamap_t map, 69 vm_paddr_t buf, bus_size_t buflen, int flags, 70 bus_dma_segment_t *segs, int *segp); 71 int (*load_buffer)(bus_dma_tag_t dmat, bus_dmamap_t map, 72 void *buf, bus_size_t buflen, struct pmap *pmap, int flags, 73 bus_dma_segment_t *segs, int *segp); 74 void (*map_waitok)(bus_dma_tag_t dmat, bus_dmamap_t map, 75 struct memdesc *mem, bus_dmamap_callback_t *callback, 76 void *callback_arg); 77 bus_dma_segment_t *(*map_complete)(bus_dma_tag_t dmat, bus_dmamap_t map, 78 bus_dma_segment_t *segs, int nsegs, int error); 79 void (*map_unload)(bus_dma_tag_t dmat, bus_dmamap_t map); 80 void (*map_sync)(bus_dma_tag_t dmat, bus_dmamap_t map, 81 bus_dmasync_op_t op); 82 }; 83 84 void bus_dma_dflt_lock(void *arg, bus_dma_lock_op_t op); 85 int bus_dma_run_filter(struct bus_dma_tag_common *dmat, bus_addr_t paddr); 86 int common_bus_dma_tag_create(struct bus_dma_tag_common *parent, 87 bus_size_t alignment, 88 bus_addr_t boundary, bus_addr_t lowaddr, bus_addr_t highaddr, 89 bus_dma_filter_t *filter, void *filterarg, bus_size_t maxsize, 90 int nsegments, bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc, 91 void *lockfuncarg, size_t sz, void **dmat); 92 93 extern struct bus_dma_impl bus_dma_bounce_impl; 94 95 #endif 96