1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (C) 2003 5 * Hidetoshi Shimokawa. All rights reserved. 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * 18 * This product includes software developed by Hidetoshi Shimokawa. 19 * 20 * 4. Neither the name of the author nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * $FreeBSD$ 37 */ 38 39 struct fwdma_alloc { 40 bus_dma_tag_t dma_tag; 41 bus_dmamap_t dma_map; 42 void *v_addr; 43 bus_addr_t bus_addr; 44 }; 45 46 struct fwdma_seg { 47 bus_dmamap_t dma_map; 48 void *v_addr; 49 bus_addr_t bus_addr; 50 }; 51 52 struct fwdma_alloc_multi { 53 bus_size_t ssize; 54 bus_size_t esize; 55 int nseg; 56 bus_dma_tag_t dma_tag; 57 struct fwdma_seg seg[0]; 58 }; 59 60 static __inline void * 61 fwdma_v_addr(struct fwdma_alloc_multi *am, int index) 62 { 63 bus_size_t ssize = am->ssize; 64 int offset = am->esize * index; 65 66 return ((caddr_t)am->seg[offset / ssize].v_addr + (offset % ssize)); 67 } 68 69 static __inline bus_addr_t 70 fwdma_bus_addr(struct fwdma_alloc_multi *am, int index) 71 { 72 bus_size_t ssize = am->ssize; 73 int offset = am->esize * index; 74 75 return (am->seg[offset / ssize].bus_addr + (offset % ssize)); 76 } 77 78 static __inline void 79 fwdma_sync(struct fwdma_alloc *dma, bus_dmasync_op_t op) 80 { 81 bus_dmamap_sync(dma->dma_tag, dma->dma_map, op); 82 } 83 84 static __inline void 85 fwdma_sync_multiseg(struct fwdma_alloc_multi *am, 86 int start, int end, bus_dmasync_op_t op) 87 { 88 struct fwdma_seg *seg, *eseg; 89 90 seg = &am->seg[am->esize * start / am->ssize]; 91 eseg = &am->seg[am->esize * end / am->ssize]; 92 for (; seg <= eseg; seg++) 93 bus_dmamap_sync(am->dma_tag, seg->dma_map, op); 94 } 95 96 static __inline void 97 fwdma_sync_multiseg_all(struct fwdma_alloc_multi *am, bus_dmasync_op_t op) 98 { 99 struct fwdma_seg *seg; 100 int i; 101 102 seg = &am->seg[0]; 103 for (i = 0; i < am->nseg; i++, seg++) 104 bus_dmamap_sync(am->dma_tag, seg->dma_map, op); 105 } 106 107 void *fwdma_malloc(struct firewire_comm *, int, bus_size_t, struct fwdma_alloc *, int); 108 void fwdma_free(struct firewire_comm *, struct fwdma_alloc *); 109 void *fwdma_malloc_size(bus_dma_tag_t, bus_dmamap_t *, bus_size_t, bus_addr_t *, int); 110 void fwdma_free_size(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