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 29 #ifndef _MACHINE_BUS_DMA_IMPL_H_ 30 #define _MACHINE_BUS_DMA_IMPL_H_ 31 32 struct bus_dma_tag_common { 33 struct bus_dma_impl *impl; 34 bus_size_t alignment; 35 bus_addr_t boundary; 36 bus_addr_t lowaddr; 37 bus_addr_t highaddr; 38 bus_size_t maxsize; 39 u_int nsegments; 40 bus_size_t maxsegsz; 41 int flags; 42 bus_dma_lock_t *lockfunc; 43 void *lockfuncarg; 44 }; 45 46 struct bus_dma_impl { 47 int (*tag_create)(bus_dma_tag_t parent, 48 bus_size_t alignment, bus_addr_t boundary, bus_addr_t lowaddr, 49 bus_addr_t highaddr, bus_size_t maxsize, int nsegments, 50 bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc, 51 void *lockfuncarg, bus_dma_tag_t *dmat); 52 int (*tag_destroy)(bus_dma_tag_t dmat); 53 int (*map_create)(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp); 54 int (*map_destroy)(bus_dma_tag_t dmat, bus_dmamap_t map); 55 int (*mem_alloc)(bus_dma_tag_t dmat, void** vaddr, int flags, 56 bus_dmamap_t *mapp); 57 void (*mem_free)(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map); 58 int (*load_ma)(bus_dma_tag_t dmat, bus_dmamap_t map, 59 struct vm_page **ma, bus_size_t tlen, int ma_offs, int flags, 60 bus_dma_segment_t *segs, int *segp); 61 int (*load_phys)(bus_dma_tag_t dmat, bus_dmamap_t map, 62 vm_paddr_t buf, bus_size_t buflen, int flags, 63 bus_dma_segment_t *segs, int *segp); 64 int (*load_buffer)(bus_dma_tag_t dmat, bus_dmamap_t map, 65 void *buf, bus_size_t buflen, struct pmap *pmap, int flags, 66 bus_dma_segment_t *segs, int *segp); 67 void (*map_waitok)(bus_dma_tag_t dmat, bus_dmamap_t map, 68 struct memdesc *mem, bus_dmamap_callback_t *callback, 69 void *callback_arg); 70 bus_dma_segment_t *(*map_complete)(bus_dma_tag_t dmat, bus_dmamap_t map, 71 bus_dma_segment_t *segs, int nsegs, int error); 72 void (*map_unload)(bus_dma_tag_t dmat, bus_dmamap_t map); 73 void (*map_sync)(bus_dma_tag_t dmat, bus_dmamap_t map, 74 bus_dmasync_op_t op); 75 }; 76 77 int common_bus_dma_tag_create(struct bus_dma_tag_common *parent, 78 bus_size_t alignment, 79 bus_addr_t boundary, bus_addr_t lowaddr, bus_addr_t highaddr, 80 bus_size_t maxsize, int nsegments, bus_size_t maxsegsz, int flags, 81 bus_dma_lock_t *lockfunc, void *lockfuncarg, size_t sz, void **dmat); 82 83 extern struct bus_dma_impl bus_dma_bounce_impl; 84 85 #endif 86