| 1 | /* $NetBSD: fwdma.h,v 1.6 2010/03/29 03:05:27 kiyohara Exp $ */ |
| 2 | /*- |
| 3 | * Copyright (C) 2003 |
| 4 | * Hidetoshi Shimokawa. All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * 3. All advertising materials mentioning features or use of this software |
| 15 | * must display the following acknowledgement: |
| 16 | * |
| 17 | * This product includes software developed by Hidetoshi Shimokawa. |
| 18 | * |
| 19 | * 4. Neither the name of the author nor the names of its contributors |
| 20 | * may be used to endorse or promote products derived from this software |
| 21 | * without specific prior written permission. |
| 22 | * |
| 23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 33 | * SUCH DAMAGE. |
| 34 | * |
| 35 | * $FreeBSD: /repoman/r/ncvs/src/sys/dev/firewire/fwdma.h,v 1.3 2005/01/06 01:42:41 imp Exp $ |
| 36 | */ |
| 37 | |
| 38 | #ifndef _FWDMA_H_ |
| 39 | #define _FWDMA_H_ |
| 40 | |
| 41 | struct fwdma_alloc { |
| 42 | bus_dma_tag_t dma_tag; |
| 43 | bus_dmamap_t dma_map; |
| 44 | void * v_addr; |
| 45 | bus_addr_t bus_addr; |
| 46 | }; |
| 47 | |
| 48 | struct fwdma_seg { |
| 49 | bus_dmamap_t dma_map; |
| 50 | void * v_addr; |
| 51 | bus_addr_t bus_addr; |
| 52 | }; |
| 53 | |
| 54 | struct fwdma_alloc_multi { |
| 55 | bus_size_t ssize; |
| 56 | bus_size_t esize; |
| 57 | int nseg; |
| 58 | bus_dma_tag_t dma_tag; |
| 59 | struct fwdma_seg seg[0]; |
| 60 | }; |
| 61 | |
| 62 | static __inline void * |
| 63 | fwdma_v_addr(struct fwdma_alloc_multi *am, int index) |
| 64 | { |
| 65 | bus_size_t ssize = am->ssize; |
| 66 | int offset = am->esize * index; |
| 67 | |
| 68 | return (char *)am->seg[offset / ssize].v_addr + (offset % ssize); |
| 69 | } |
| 70 | |
| 71 | static __inline bus_addr_t |
| 72 | fwdma_bus_addr(struct fwdma_alloc_multi *am, int index) |
| 73 | { |
| 74 | bus_size_t ssize = am->ssize; |
| 75 | int offset = am->esize * index; |
| 76 | |
| 77 | return am->seg[offset / ssize].bus_addr + (offset % ssize); |
| 78 | } |
| 79 | |
| 80 | static __inline void |
| 81 | fwdma_sync_multiseg(struct fwdma_alloc_multi *am, int start, int end, int op) |
| 82 | { |
| 83 | struct fwdma_seg *seg, *eseg; |
| 84 | bus_addr_t off, eoff; |
| 85 | |
| 86 | off = (am->esize * start) % am->ssize; |
| 87 | eoff = (am->esize * end) % am->ssize; |
| 88 | seg = &am->seg[am->esize * start / am->ssize]; |
| 89 | eseg = &am->seg[am->esize * end / am->ssize]; |
| 90 | |
| 91 | if (start > end) { |
| 92 | for (; seg < &am->seg[am->nseg]; seg++) { |
| 93 | bus_dmamap_sync(am->dma_tag, seg->dma_map, |
| 94 | off, seg->dma_map->dm_mapsize - off, op); |
| 95 | off = 0; |
| 96 | } |
| 97 | seg = am->seg; |
| 98 | } |
| 99 | for (; seg < eseg; seg++) { |
| 100 | bus_dmamap_sync(am->dma_tag, seg->dma_map, |
| 101 | off, seg->dma_map->dm_mapsize - off, op); |
| 102 | off = 0; |
| 103 | } |
| 104 | bus_dmamap_sync(am->dma_tag, seg->dma_map, |
| 105 | off, eoff - off + am->esize, op); |
| 106 | } |
| 107 | |
| 108 | static __inline void |
| 109 | fwdma_sync_multiseg_all(struct fwdma_alloc_multi *am, int op) |
| 110 | { |
| 111 | struct fwdma_seg *seg; |
| 112 | int i; |
| 113 | |
| 114 | seg = am->seg; |
| 115 | for (i = 0; i < am->nseg; i++, seg++) |
| 116 | bus_dmamap_sync(am->dma_tag, seg->dma_map, |
| 117 | 0, seg->dma_map->dm_mapsize, op); |
| 118 | } |
| 119 | |
| 120 | void *fwdma_malloc(device_t, bus_dma_tag_t, bus_dmamap_t *, bus_size_t, int, |
| 121 | int); |
| 122 | void fwdma_free(bus_dma_tag_t, bus_dmamap_t, void *); |
| 123 | void *fwdma_alloc_setup(device_t, bus_dma_tag_t, bus_size_t, |
| 124 | struct fwdma_alloc *, int, int); |
| 125 | struct fwdma_alloc_multi *fwdma_malloc_multiseg(struct firewire_comm *, |
| 126 | int, int, int, int); |
| 127 | void fwdma_free_multiseg(struct fwdma_alloc_multi *); |
| 128 | |
| 129 | #endif /* _FWDMA_H_ */ |
| 130 | |