1 /* $NetBSD: fwdma.h,v 1.2 2005/12/11 12:22:02 christos 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 struct fwdma_alloc { 39 fw_bus_dma_tag_t fw_dma_tag; 40 bus_dmamap_t dma_map; 41 void * v_addr; 42 bus_addr_t bus_addr; 43 }; 44 45 struct fwdma_seg { 46 bus_dmamap_t dma_map; 47 void * v_addr; 48 bus_addr_t bus_addr; 49 }; 50 51 struct fwdma_alloc_multi { 52 bus_size_t ssize; 53 bus_size_t esize; 54 int nseg; 55 fw_bus_dma_tag_t fw_dma_tag; 56 struct fwdma_seg seg[0]; 57 }; 58 59 static __inline void * 60 fwdma_v_addr(struct fwdma_alloc_multi *am, int index) 61 { 62 bus_size_t ssize = am->ssize; 63 int offset = am->esize * index; 64 65 return ((caddr_t)am->seg[offset / ssize].v_addr + (offset % ssize)); 66 } 67 68 static __inline bus_addr_t 69 fwdma_bus_addr(struct fwdma_alloc_multi *am, int index) 70 { 71 bus_size_t ssize = am->ssize; 72 int offset = am->esize * index; 73 74 return (am->seg[offset / ssize].bus_addr + (offset % ssize)); 75 } 76 77 static __inline void 78 fwdma_sync(struct fwdma_alloc *dma, bus_dmasync_op_t op) 79 { 80 fw_bus_dmamap_sync(dma->fw_dma_tag, dma->dma_map, op); 81 } 82 83 static __inline void 84 fwdma_sync_multiseg(struct fwdma_alloc_multi *am, 85 int start, int end, bus_dmasync_op_t op) 86 { 87 struct fwdma_seg *seg, *eseg; 88 89 seg = &am->seg[am->esize * start / am->ssize]; 90 eseg = &am->seg[am->esize * end / am->ssize]; 91 for (; seg <= eseg; seg ++) 92 fw_bus_dmamap_sync(am->fw_dma_tag, seg->dma_map, op); 93 } 94 95 static __inline void 96 fwdma_sync_multiseg_all(struct fwdma_alloc_multi *am, bus_dmasync_op_t op) 97 { 98 struct fwdma_seg *seg; 99 int i; 100 101 seg = &am->seg[0]; 102 for (i = 0; i < am->nseg; i++, seg++) 103 fw_bus_dmamap_sync(am->fw_dma_tag, seg->dma_map, op); 104 } 105 106 void *fwdma_malloc(struct firewire_comm *, int, bus_size_t, struct fwdma_alloc *, int); 107 void fwdma_free(struct firewire_comm *, struct fwdma_alloc *); 108 void *fwdma_malloc_size( 109 fw_bus_dma_tag_t, bus_dmamap_t *, bus_size_t, bus_addr_t *, int); 110 void fwdma_free_size(fw_bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t); 111 struct fwdma_alloc_multi *fwdma_malloc_multiseg(struct firewire_comm *, 112 int, int, int, int); 113 void fwdma_free_multiseg(struct fwdma_alloc_multi *); 114 115