uba_dma.c revision 1.2
1 /* $NetBSD: uba_dma.c,v 1.2 1999/06/20 00:59:55 ragge Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPEUBAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/kernel.h> 44 #include <sys/device.h> 45 #include <sys/malloc.h> 46 #include <vm/vm.h> 47 48 #define _VAX_BUS_DMA_PRIVATE 49 #include <machine/bus.h> 50 #include <machine/cpu.h> 51 #include <machine/sgmap.h> 52 53 #include <dev/qbus/ubavar.h> 54 55 #include <arch/vax/uba/uba_common.h> 56 57 int uba_bus_dmamap_create_sgmap __P((bus_dma_tag_t, bus_size_t, int, 58 bus_size_t, bus_size_t, int, bus_dmamap_t *)); 59 60 void uba_bus_dmamap_destroy_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); 61 62 int uba_bus_dmamap_load_sgmap __P((bus_dma_tag_t, bus_dmamap_t, void *, 63 bus_size_t, struct proc *, int)); 64 65 int uba_bus_dmamap_load_mbuf_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 66 struct mbuf *, int)); 67 68 int uba_bus_dmamap_load_uio_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 69 struct uio *, int)); 70 71 int uba_bus_dmamap_load_raw_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 72 bus_dma_segment_t *, int, bus_size_t, int)); 73 74 void uba_bus_dmamap_unload_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); 75 76 void uba_bus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 77 bus_size_t, int)); 78 79 void 80 uba_dma_init(sc) 81 struct uba_vsoftc *sc; 82 { 83 bus_dma_tag_t t; 84 struct pte *pte; 85 86 /* 87 * Initialize the DMA tag used for sgmap-mapped DMA. 88 */ 89 t = &sc->uv_dmat; 90 t->_cookie = sc; 91 t->_wbase = 0; 92 t->_wsize = sc->uv_size; 93 t->_boundary = 0; 94 t->_sgmap = &sc->uv_sgmap; 95 t->_dmamap_create = uba_bus_dmamap_create_sgmap; 96 t->_dmamap_destroy = uba_bus_dmamap_destroy_sgmap; 97 t->_dmamap_load = uba_bus_dmamap_load_sgmap; 98 t->_dmamap_load_mbuf = uba_bus_dmamap_load_mbuf_sgmap; 99 t->_dmamap_load_uio = uba_bus_dmamap_load_uio_sgmap; 100 t->_dmamap_load_raw = uba_bus_dmamap_load_raw_sgmap; 101 t->_dmamap_unload = uba_bus_dmamap_unload_sgmap; 102 t->_dmamap_sync = uba_bus_dmamap_sync; 103 104 t->_dmamem_alloc = _bus_dmamem_alloc; 105 t->_dmamem_free = _bus_dmamem_free; 106 t->_dmamem_map = _bus_dmamem_map; 107 t->_dmamem_unmap = _bus_dmamem_unmap; 108 t->_dmamem_mmap = _bus_dmamem_mmap; 109 110 /* 111 * Map in Unibus map registers. 112 */ 113 pte = (struct pte *)vax_map_physmem(sc->uv_addr, sc->uv_size/VAX_NBPG); 114 if (pte == 0) 115 panic("uba_dma_init"); 116 /* 117 * Initialize the SGMAP. 118 */ 119 vax_sgmap_init(t, &sc->uv_sgmap, "uba_sgmap", 0, sc->uv_size, pte, 0); 120 121 } 122 123 /* 124 * Create a UBA SGMAP-mapped DMA map. 125 */ 126 int 127 uba_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 128 flags, dmamp) 129 bus_dma_tag_t t; 130 bus_size_t size; 131 int nsegments; 132 bus_size_t maxsegsz; 133 bus_size_t boundary; 134 int flags; 135 bus_dmamap_t *dmamp; 136 { 137 bus_dmamap_t map; 138 int error; 139 140 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 141 boundary, flags, dmamp); 142 if (error) 143 return (error); 144 145 map = *dmamp; 146 147 if (flags & BUS_DMA_ALLOCNOW) { 148 error = vax_sgmap_alloc(map, vax_round_page(size), 149 t->_sgmap, flags); 150 if (error) 151 uba_bus_dmamap_destroy_sgmap(t, map); 152 } 153 154 return (error); 155 } 156 157 /* 158 * Destroy a UBA SGMAP-mapped DMA map. 159 */ 160 void 161 uba_bus_dmamap_destroy_sgmap(t, map) 162 bus_dma_tag_t t; 163 bus_dmamap_t map; 164 { 165 166 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 167 vax_sgmap_free(map, t->_sgmap); 168 169 _bus_dmamap_destroy(t, map); 170 } 171 172 /* 173 * Load a UBA SGMAP-mapped DMA map with a linear buffer. 174 */ 175 int 176 uba_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 177 bus_dma_tag_t t; 178 bus_dmamap_t map; 179 void *buf; 180 bus_size_t buflen; 181 struct proc *p; 182 int flags; 183 { 184 int error; 185 186 error = vax_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap); 187 /* 188 * XXX - Set up BDPs. 189 */ 190 191 return (error); 192 } 193 194 /* 195 * Load a UBA SGMAP-mapped DMA map with an mbuf chain. 196 */ 197 int 198 uba_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 199 bus_dma_tag_t t; 200 bus_dmamap_t map; 201 struct mbuf *m; 202 int flags; 203 { 204 int error; 205 206 error = vax_sgmap_load_mbuf(t, map, m, flags, t->_sgmap); 207 208 return (error); 209 } 210 211 /* 212 * Load a UBA SGMAP-mapped DMA map with a uio. 213 */ 214 int 215 uba_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 216 bus_dma_tag_t t; 217 bus_dmamap_t map; 218 struct uio *uio; 219 int flags; 220 { 221 int error; 222 223 error = vax_sgmap_load_uio(t, map, uio, flags, t->_sgmap); 224 225 return (error); 226 } 227 228 /* 229 * Load a UBA SGMAP-mapped DMA map with raw memory. 230 */ 231 int 232 uba_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 233 bus_dma_tag_t t; 234 bus_dmamap_t map; 235 bus_dma_segment_t *segs; 236 int nsegs; 237 bus_size_t size; 238 int flags; 239 { 240 int error; 241 242 error = vax_sgmap_load_raw(t, map, segs, nsegs, size, flags, 243 t->_sgmap); 244 245 return (error); 246 } 247 248 /* 249 * Unload a UBA DMA map. 250 */ 251 void 252 uba_bus_dmamap_unload_sgmap(t, map) 253 bus_dma_tag_t t; 254 bus_dmamap_t map; 255 { 256 257 /* 258 * Invalidate any SGMAP page table entries used by this 259 * mapping. 260 */ 261 vax_sgmap_unload(t, map, t->_sgmap); 262 263 /* 264 * Do the generic bits of the unload. 265 */ 266 _bus_dmamap_unload(t, map); 267 } 268 269 /* 270 * Sync the bus map. This is only needed if BDP's are used. 271 */ 272 void 273 uba_bus_dmamap_sync(tag, dmam, offset, len, ops) 274 bus_dma_tag_t tag; 275 bus_dmamap_t dmam; 276 bus_addr_t offset; 277 bus_size_t len; 278 int ops; 279 { 280 /* Only BDP handling, but not yet. */ 281 } 282
Indexes created Mon Sep 29 21:09:56 GMT 2025