1 /* 2 * Copyright (C) 2003 3 * Hidetoshi Shimokawa. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * 16 * This product includes software developed by Hidetoshi Shimokawa. 17 * 18 * 4. Neither the name of the author nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $FreeBSD$ 35 */ 36 37 #if __FreeBSD_version >= 500111 38 typedef int bus_dmasync_op_t; 39 #endif 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 ((caddr_t)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(struct fwdma_alloc *dma, bus_dmasync_op_t op) 82 { 83 bus_dmamap_sync(dma->dma_tag, dma->dma_map, op); 84 } 85 86 static __inline void 87 fwdma_sync_multiseg(struct fwdma_alloc_multi *am, 88 int start, int end, bus_dmasync_op_t op) 89 { 90 struct fwdma_seg *seg, *eseg; 91 92 seg = &am->seg[am->esize * start / am->ssize]; 93 eseg = &am->seg[am->esize * end / am->ssize]; 94 for (; seg <= eseg; seg ++) 95 bus_dmamap_sync(am->dma_tag, seg->dma_map, op); 96 } 97 98 static __inline void 99 fwdma_sync_multiseg_all(struct fwdma_alloc_multi *am, bus_dmasync_op_t op) 100 { 101 struct fwdma_seg *seg; 102 int i; 103 104 seg = &am->seg[0]; 105 for (i = 0; i < am->nseg; i++, seg++) 106 bus_dmamap_sync(am->dma_tag, seg->dma_map, op); 107 } 108 109 void *fwdma_malloc(struct firewire_comm *, int, bus_size_t, struct fwdma_alloc *, int); 110 void fwdma_free(struct firewire_comm *, struct fwdma_alloc *); 111 void *fwdma_malloc_size(bus_dma_tag_t, bus_dmamap_t *, bus_size_t, bus_addr_t *, int); 112 void fwdma_free_size(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t); 113 struct fwdma_alloc_multi *fwdma_malloc_multiseg(struct firewire_comm *, 114 int, int, int, int); 115 void fwdma_free_multiseg(struct fwdma_alloc_multi *); 116 117