bus_dma.h revision 1.5.2.4
1 1.5.2.4 bouyer /* $NetBSD: bus_dma.h,v 1.5.2.4 2001/03/12 13:29:06 bouyer Exp $ */ 2 1.5.2.2 bouyer 3 1.5.2.2 bouyer /* 4 1.5.2.2 bouyer * This file was extracted from from next68k/include/bus.h 5 1.5.2.2 bouyer * and should probably be resynced when needed. 6 1.5.2.2 bouyer * original cvs id: NetBSD: bus_dma.h,v 1.3 1999/08/05 01:50:59 dbj Exp 7 1.5.2.2 bouyer */ 8 1.5.2.2 bouyer 9 1.5.2.2 bouyer /*- 10 1.5.2.4 bouyer * Copyright (c) 1997, 1998, 2001 The NetBSD Foundation, Inc. 11 1.5.2.2 bouyer * All rights reserved. 12 1.5.2.2 bouyer * 13 1.5.2.2 bouyer * This code is derived from software contributed to The NetBSD Foundation 14 1.5.2.2 bouyer * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 15 1.5.2.2 bouyer * NASA Ames Research Center. 16 1.5.2.2 bouyer * 17 1.5.2.2 bouyer * Redistribution and use in source and binary forms, with or without 18 1.5.2.2 bouyer * modification, are permitted provided that the following conditions 19 1.5.2.2 bouyer * are met: 20 1.5.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 21 1.5.2.2 bouyer * notice, this list of conditions and the following disclaimer. 22 1.5.2.2 bouyer * 2. Redistributions in binary form must reproduce the above copyright 23 1.5.2.2 bouyer * notice, this list of conditions and the following disclaimer in the 24 1.5.2.2 bouyer * documentation and/or other materials provided with the distribution. 25 1.5.2.2 bouyer * 3. All advertising materials mentioning features or use of this software 26 1.5.2.2 bouyer * must display the following acknowledgement: 27 1.5.2.2 bouyer * This product includes software developed by the NetBSD 28 1.5.2.2 bouyer * Foundation, Inc. and its contributors. 29 1.5.2.2 bouyer * 4. Neither the name of The NetBSD Foundation nor the names of its 30 1.5.2.2 bouyer * contributors may be used to endorse or promote products derived 31 1.5.2.2 bouyer * from this software without specific prior written permission. 32 1.5.2.2 bouyer * 33 1.5.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 34 1.5.2.2 bouyer * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 35 1.5.2.2 bouyer * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 36 1.5.2.2 bouyer * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 37 1.5.2.2 bouyer * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 38 1.5.2.2 bouyer * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 39 1.5.2.2 bouyer * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 40 1.5.2.2 bouyer * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 41 1.5.2.2 bouyer * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 42 1.5.2.2 bouyer * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 43 1.5.2.2 bouyer * POSSIBILITY OF SUCH DAMAGE. 44 1.5.2.2 bouyer */ 45 1.5.2.2 bouyer 46 1.5.2.2 bouyer /* 47 1.5.2.2 bouyer * Copyright (c) 1996 Carnegie-Mellon University. 48 1.5.2.2 bouyer * All rights reserved. 49 1.5.2.2 bouyer * 50 1.5.2.2 bouyer * Author: Chris G. Demetriou 51 1.5.2.2 bouyer * 52 1.5.2.2 bouyer * Permission to use, copy, modify and distribute this software and 53 1.5.2.2 bouyer * its documentation is hereby granted, provided that both the copyright 54 1.5.2.2 bouyer * notice and this permission notice appear in all copies of the 55 1.5.2.2 bouyer * software, derivative works or modified versions, and any portions 56 1.5.2.2 bouyer * thereof, and that both notices appear in supporting documentation. 57 1.5.2.2 bouyer * 58 1.5.2.2 bouyer * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 59 1.5.2.2 bouyer * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 60 1.5.2.2 bouyer * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 61 1.5.2.2 bouyer * 62 1.5.2.2 bouyer * Carnegie Mellon requests users of this software to return to 63 1.5.2.2 bouyer * 64 1.5.2.2 bouyer * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 65 1.5.2.2 bouyer * School of Computer Science 66 1.5.2.2 bouyer * Carnegie Mellon University 67 1.5.2.2 bouyer * Pittsburgh PA 15213-3890 68 1.5.2.2 bouyer * 69 1.5.2.2 bouyer * any improvements or extensions that they make and grant Carnegie the 70 1.5.2.2 bouyer * rights to redistribute these changes. 71 1.5.2.2 bouyer */ 72 1.5.2.2 bouyer 73 1.5.2.2 bouyer #ifndef _MVME68K_BUS_DMA_H_ 74 1.5.2.2 bouyer #define _MVME68K_BUS_DMA_H_ 75 1.5.2.2 bouyer 76 1.5.2.2 bouyer /* 77 1.5.2.2 bouyer * Bus DMA methods. 78 1.5.2.2 bouyer */ 79 1.5.2.2 bouyer 80 1.5.2.2 bouyer /* 81 1.5.2.2 bouyer * Flags used in various bus DMA methods. 82 1.5.2.2 bouyer */ 83 1.5.2.2 bouyer #define BUS_DMA_WAITOK 0x00 /* safe to sleep (pseudo-flag) */ 84 1.5.2.2 bouyer #define BUS_DMA_NOWAIT 0x01 /* not safe to sleep */ 85 1.5.2.2 bouyer #define BUS_DMA_ALLOCNOW 0x02 /* perform resource allocation now */ 86 1.5.2.2 bouyer #define BUS_DMA_COHERENT 0x04 /* hint: map memory DMA coherent */ 87 1.5.2.4 bouyer #define BUS_DMA_STREAMING 0x08 /* hint: sequential, unidirectional */ 88 1.5.2.2 bouyer #define BUS_DMA_BUS1 0x10 /* placeholders for bus functions... */ 89 1.5.2.2 bouyer #define BUS_DMA_BUS2 0x20 90 1.5.2.2 bouyer #define BUS_DMA_BUS3 0x40 91 1.5.2.2 bouyer #define BUS_DMA_BUS4 0x80 92 1.5.2.2 bouyer 93 1.5.2.2 bouyer /* 94 1.5.2.2 bouyer * Flags to constrain the physical memory allocated for DMA 95 1.5.2.2 bouyer */ 96 1.5.2.2 bouyer #define BUS_DMA_ONBOARD_RAM BUS_DMA_BUS1 97 1.5.2.2 bouyer #define BUS_DMA_24BIT BUS_DMA_BUS2 98 1.5.2.2 bouyer 99 1.5.2.2 bouyer /* Forwards needed by prototypes below. */ 100 1.5.2.2 bouyer struct mbuf; 101 1.5.2.2 bouyer struct uio; 102 1.5.2.2 bouyer 103 1.5.2.2 bouyer /* 104 1.5.2.2 bouyer * Operations performed by bus_dmamap_sync(). 105 1.5.2.2 bouyer */ 106 1.5.2.2 bouyer #define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */ 107 1.5.2.2 bouyer #define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */ 108 1.5.2.2 bouyer #define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */ 109 1.5.2.2 bouyer #define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */ 110 1.5.2.2 bouyer 111 1.5.2.2 bouyer typedef struct mvme68k_bus_dma_tag *bus_dma_tag_t; 112 1.5.2.2 bouyer typedef struct mvme68k_bus_dmamap *bus_dmamap_t; 113 1.5.2.2 bouyer 114 1.5.2.2 bouyer /* 115 1.5.2.2 bouyer * bus_dma_segment_t 116 1.5.2.2 bouyer * 117 1.5.2.2 bouyer * Describes a single contiguous DMA transaction. Values 118 1.5.2.2 bouyer * are suitable for programming into DMA registers. 119 1.5.2.2 bouyer */ 120 1.5.2.2 bouyer struct mvme68k_bus_dma_segment { 121 1.5.2.2 bouyer bus_addr_t ds_addr; /* DMA address */ 122 1.5.2.2 bouyer bus_size_t ds_len; /* length of transfer */ 123 1.5.2.2 bouyer 124 1.5.2.2 bouyer /* PRIVATE */ 125 1.5.2.2 bouyer bus_addr_t _ds_cpuaddr; /* CPU-relative phys addr of segment */ 126 1.5.2.2 bouyer int _ds_padding; 127 1.5.2.2 bouyer }; 128 1.5.2.2 bouyer typedef struct mvme68k_bus_dma_segment bus_dma_segment_t; 129 1.5.2.2 bouyer 130 1.5.2.2 bouyer /* 131 1.5.2.2 bouyer * bus_dma_tag_t 132 1.5.2.2 bouyer * 133 1.5.2.2 bouyer * A machine-dependent opaque type describing the implementation of 134 1.5.2.2 bouyer * DMA for a given bus. 135 1.5.2.2 bouyer */ 136 1.5.2.2 bouyer struct mvme68k_bus_dma_tag { 137 1.5.2.2 bouyer void *_cookie; /* cookie used in the guts */ 138 1.5.2.2 bouyer 139 1.5.2.2 bouyer /* 140 1.5.2.2 bouyer * DMA mapping methods. 141 1.5.2.2 bouyer */ 142 1.5.2.2 bouyer int (*_dmamap_create) __P((bus_dma_tag_t, bus_size_t, int, 143 1.5.2.2 bouyer bus_size_t, bus_size_t, int, bus_dmamap_t *)); 144 1.5.2.2 bouyer void (*_dmamap_destroy) __P((bus_dma_tag_t, bus_dmamap_t)); 145 1.5.2.2 bouyer int (*_dmamap_load) __P((bus_dma_tag_t, bus_dmamap_t, void *, 146 1.5.2.2 bouyer bus_size_t, struct proc *, int)); 147 1.5.2.2 bouyer int (*_dmamap_load_mbuf) __P((bus_dma_tag_t, bus_dmamap_t, 148 1.5.2.2 bouyer struct mbuf *, int)); 149 1.5.2.2 bouyer int (*_dmamap_load_uio) __P((bus_dma_tag_t, bus_dmamap_t, 150 1.5.2.2 bouyer struct uio *, int)); 151 1.5.2.2 bouyer int (*_dmamap_load_raw) __P((bus_dma_tag_t, bus_dmamap_t, 152 1.5.2.2 bouyer bus_dma_segment_t *, int, bus_size_t, int)); 153 1.5.2.2 bouyer void (*_dmamap_unload) __P((bus_dma_tag_t, bus_dmamap_t)); 154 1.5.2.2 bouyer void (*_dmamap_sync) __P((bus_dma_tag_t, bus_dmamap_t, 155 1.5.2.2 bouyer bus_addr_t, bus_size_t, int)); 156 1.5.2.2 bouyer 157 1.5.2.2 bouyer /* 158 1.5.2.2 bouyer * DMA memory utility functions. 159 1.5.2.2 bouyer */ 160 1.5.2.2 bouyer int (*_dmamem_alloc) __P((bus_dma_tag_t, bus_size_t, bus_size_t, 161 1.5.2.2 bouyer bus_size_t, bus_dma_segment_t *, int, int *, int)); 162 1.5.2.2 bouyer void (*_dmamem_free) __P((bus_dma_tag_t, 163 1.5.2.2 bouyer bus_dma_segment_t *, int)); 164 1.5.2.2 bouyer int (*_dmamem_map) __P((bus_dma_tag_t, bus_dma_segment_t *, 165 1.5.2.2 bouyer int, size_t, caddr_t *, int)); 166 1.5.2.2 bouyer void (*_dmamem_unmap) __P((bus_dma_tag_t, caddr_t, size_t)); 167 1.5.2.2 bouyer paddr_t (*_dmamem_mmap) __P((bus_dma_tag_t, bus_dma_segment_t *, 168 1.5.2.2 bouyer int, off_t, int, int)); 169 1.5.2.2 bouyer }; 170 1.5.2.2 bouyer 171 1.5.2.2 bouyer #define bus_dmamap_create(t, s, n, m, b, f, p) \ 172 1.5.2.2 bouyer (*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p)) 173 1.5.2.2 bouyer #define bus_dmamap_destroy(t, p) \ 174 1.5.2.2 bouyer (*(t)->_dmamap_destroy)((t), (p)) 175 1.5.2.2 bouyer #define bus_dmamap_load(t, m, b, s, p, f) \ 176 1.5.2.2 bouyer (*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f)) 177 1.5.2.2 bouyer #define bus_dmamap_load_mbuf(t, m, b, f) \ 178 1.5.2.2 bouyer (*(t)->_dmamap_load_mbuf)((t), (m), (b), (f)) 179 1.5.2.2 bouyer #define bus_dmamap_load_uio(t, m, u, f) \ 180 1.5.2.2 bouyer (*(t)->_dmamap_load_uio)((t), (m), (u), (f)) 181 1.5.2.2 bouyer #define bus_dmamap_load_raw(t, m, sg, n, s, f) \ 182 1.5.2.2 bouyer (*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f)) 183 1.5.2.2 bouyer #define bus_dmamap_unload(t, p) \ 184 1.5.2.2 bouyer (*(t)->_dmamap_unload)((t), (p)) 185 1.5.2.2 bouyer #define bus_dmamap_sync(t, p, o, l, ops) \ 186 1.5.2.2 bouyer (*(t)->_dmamap_sync)((t), (p), (o), (l), (ops)) 187 1.5.2.2 bouyer #define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \ 188 1.5.2.2 bouyer (*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f)) 189 1.5.2.2 bouyer #define bus_dmamem_free(t, sg, n) \ 190 1.5.2.2 bouyer (*(t)->_dmamem_free)((t), (sg), (n)) 191 1.5.2.2 bouyer #define bus_dmamem_map(t, sg, n, s, k, f) \ 192 1.5.2.2 bouyer (*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f)) 193 1.5.2.2 bouyer #define bus_dmamem_unmap(t, k, s) \ 194 1.5.2.2 bouyer (*(t)->_dmamem_unmap)((t), (k), (s)) 195 1.5.2.2 bouyer #define bus_dmamem_mmap(t, sg, n, o, p, f) \ 196 1.5.2.2 bouyer (*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f)) 197 1.5.2.2 bouyer 198 1.5.2.2 bouyer /* 199 1.5.2.2 bouyer * bus_dmamap_t 200 1.5.2.2 bouyer * 201 1.5.2.2 bouyer * Describes a DMA mapping. 202 1.5.2.2 bouyer */ 203 1.5.2.2 bouyer struct mvme68k_bus_dmamap { 204 1.5.2.2 bouyer /* 205 1.5.2.2 bouyer * PRIVATE MEMBERS: not for use by machine-independent code. 206 1.5.2.2 bouyer */ 207 1.5.2.2 bouyer bus_size_t _dm_size; /* largest DMA transfer mappable */ 208 1.5.2.2 bouyer int _dm_segcnt; /* number of segs this map can map */ 209 1.5.2.2 bouyer bus_size_t _dm_maxsegsz; /* largest possible segment */ 210 1.5.2.2 bouyer bus_size_t _dm_boundary; /* don't cross this */ 211 1.5.2.2 bouyer int _dm_flags; /* misc. flags */ 212 1.5.2.2 bouyer void *_dm_cookie; /* Bus-specific cookie */ 213 1.5.2.2 bouyer 214 1.5.2.2 bouyer /* 215 1.5.2.2 bouyer * PUBLIC MEMBERS: these are used by machine-independent code. 216 1.5.2.2 bouyer */ 217 1.5.2.2 bouyer bus_size_t dm_mapsize; /* size of the mapping */ 218 1.5.2.2 bouyer int dm_nsegs; /* # valid segments in mapping */ 219 1.5.2.2 bouyer bus_dma_segment_t dm_segs[1]; /* segments; variable length */ 220 1.5.2.2 bouyer }; 221 1.5.2.2 bouyer 222 1.5.2.2 bouyer #ifdef _MVME68K_BUS_DMA_PRIVATE 223 1.5.2.2 bouyer int _bus_dmamap_create __P((bus_dma_tag_t, bus_size_t, int, bus_size_t, 224 1.5.2.2 bouyer bus_size_t, int, bus_dmamap_t *)); 225 1.5.2.2 bouyer void _bus_dmamap_destroy __P((bus_dma_tag_t, bus_dmamap_t)); 226 1.5.2.2 bouyer 227 1.5.2.2 bouyer int _bus_dmamap_load_direct __P((bus_dma_tag_t, bus_dmamap_t, 228 1.5.2.2 bouyer void *, bus_size_t, struct proc *, int)); 229 1.5.2.2 bouyer int _bus_dmamap_load_mbuf_direct __P((bus_dma_tag_t, 230 1.5.2.2 bouyer bus_dmamap_t, struct mbuf *, int)); 231 1.5.2.2 bouyer int _bus_dmamap_load_uio_direct __P((bus_dma_tag_t, 232 1.5.2.2 bouyer bus_dmamap_t, struct uio *, int)); 233 1.5.2.2 bouyer int _bus_dmamap_load_raw_direct __P((bus_dma_tag_t, 234 1.5.2.2 bouyer bus_dmamap_t, bus_dma_segment_t *, int, bus_size_t, int)); 235 1.5.2.2 bouyer void _bus_dmamap_unload __P((bus_dma_tag_t, bus_dmamap_t)); 236 1.5.2.2 bouyer void _bus_dmamap_sync_030 __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 237 1.5.2.2 bouyer bus_size_t, int)); 238 1.5.2.2 bouyer void _bus_dmamap_sync_0460 __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 239 1.5.2.2 bouyer bus_size_t, int)); 240 1.5.2.2 bouyer 241 1.5.2.2 bouyer int _bus_dmamem_alloc_common __P((bus_dma_tag_t, 242 1.5.2.2 bouyer bus_addr_t, bus_addr_t, bus_size_t, bus_size_t, bus_size_t, 243 1.5.2.2 bouyer bus_dma_segment_t *, int, int *, int)); 244 1.5.2.2 bouyer 245 1.5.2.2 bouyer int _bus_dmamem_alloc __P((bus_dma_tag_t tag, bus_size_t size, 246 1.5.2.2 bouyer bus_size_t alignment, bus_size_t boundary, 247 1.5.2.2 bouyer bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags)); 248 1.5.2.2 bouyer void _bus_dmamem_free __P((bus_dma_tag_t tag, bus_dma_segment_t *segs, 249 1.5.2.2 bouyer int nsegs)); 250 1.5.2.2 bouyer int _bus_dmamem_map __P((bus_dma_tag_t tag, bus_dma_segment_t *segs, 251 1.5.2.2 bouyer int nsegs, size_t size, caddr_t *kvap, int flags)); 252 1.5.2.2 bouyer void _bus_dmamem_unmap __P((bus_dma_tag_t tag, caddr_t kva, 253 1.5.2.2 bouyer size_t size)); 254 1.5.2.2 bouyer paddr_t _bus_dmamem_mmap __P((bus_dma_tag_t tag, bus_dma_segment_t *segs, 255 1.5.2.2 bouyer int nsegs, off_t off, int prot, int flags)); 256 1.5.2.2 bouyer #endif /* _MVME68K_BUS_DMA_PRIVATE */ 257 1.5.2.2 bouyer 258 1.5.2.2 bouyer #endif /* _MVME68K_BUS_DMA_H_ */ 259
Indexes created Wed Oct 29 18:09:52 GMT 2025