fwdma.h (3724B) - Raw
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 37 struct fwdma_alloc { 38 bus_dma_tag_t dma_tag; 39 bus_dmamap_t dma_map; 40 void *v_addr; 41 bus_addr_t bus_addr; 42 }; 43 44 struct fwdma_seg { 45 bus_dmamap_t dma_map; 46 void *v_addr; 47 bus_addr_t bus_addr; 48 }; 49 50 struct fwdma_alloc_multi { 51 bus_size_t ssize; 52 bus_size_t esize; 53 int nseg; 54 bus_dma_tag_t dma_tag; 55 struct fwdma_seg seg[0]; 56 }; 57 58 static __inline void * 59 fwdma_v_addr(struct fwdma_alloc_multi *am, int index) 60 { 61 bus_size_t ssize = am->ssize; 62 int offset = am->esize * index; 63 64 return ((caddr_t)am->seg[offset / ssize].v_addr + (offset % ssize)); 65 } 66 67 static __inline bus_addr_t 68 fwdma_bus_addr(struct fwdma_alloc_multi *am, int index) 69 { 70 bus_size_t ssize = am->ssize; 71 int offset = am->esize * index; 72 73 return (am->seg[offset / ssize].bus_addr + (offset % ssize)); 74 } 75 76 static __inline void 77 fwdma_sync(struct fwdma_alloc *dma, bus_dmasync_op_t op) 78 { 79 bus_dmamap_sync(dma->dma_tag, dma->dma_map, op); 80 } 81 82 static __inline void 83 fwdma_sync_multiseg(struct fwdma_alloc_multi *am, 84 int start, int end, bus_dmasync_op_t op) 85 { 86 struct fwdma_seg *seg, *eseg; 87 88 seg = &am->seg[am->esize * start / am->ssize]; 89 eseg = &am->seg[am->esize * end / am->ssize]; 90 for (; seg <= eseg; seg++) 91 bus_dmamap_sync(am->dma_tag, seg->dma_map, op); 92 } 93 94 static __inline void 95 fwdma_sync_multiseg_all(struct fwdma_alloc_multi *am, bus_dmasync_op_t op) 96 { 97 struct fwdma_seg *seg; 98 int i; 99 100 seg = &am->seg[0]; 101 for (i = 0; i < am->nseg; i++, seg++) 102 bus_dmamap_sync(am->dma_tag, seg->dma_map, op); 103 } 104 105 void *fwdma_malloc(struct firewire_comm *, int, bus_size_t, struct fwdma_alloc *, int); 106 void fwdma_free(struct firewire_comm *, struct fwdma_alloc *); 107 void *fwdma_malloc_size(bus_dma_tag_t, bus_dmamap_t *, bus_size_t, bus_addr_t *, int); 108 void fwdma_free_size(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t); 109 struct fwdma_alloc_multi *fwdma_malloc_multiseg(struct firewire_comm *, 110 int, int, int, int); 111 void fwdma_free_multiseg(struct fwdma_alloc_multi *);