vsbus_dma.c revision 1.1
1 /* $NetBSD: vsbus_dma.c,v 1.1 2000/03/03 22:57:49 matt 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, SPECIAL, 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 #include <machine/vsbus.h> 53 54 static int vsbus_bus_dmamap_create_sgmap __P((bus_dma_tag_t, bus_size_t, int, 55 bus_size_t, bus_size_t, int, bus_dmamap_t *)); 56 57 static void vsbus_bus_dmamap_destroy_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); 58 59 static int vsbus_bus_dmamap_load_sgmap __P((bus_dma_tag_t, bus_dmamap_t, void *, 60 bus_size_t, struct proc *, int)); 61 62 static int vsbus_bus_dmamap_load_mbuf_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 63 struct mbuf *, int)); 64 65 static int vsbus_bus_dmamap_load_uio_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 66 struct uio *, int)); 67 68 static int vsbus_bus_dmamap_load_raw_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 69 bus_dma_segment_t *, int, bus_size_t, int)); 70 71 static void vsbus_bus_dmamap_unload_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); 72 73 static void vsbus_bus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 74 bus_size_t, int)); 75 76 void 77 vsbus_dma_init(sc) 78 struct vsbus_softc *sc; 79 { 80 bus_dma_tag_t t; 81 struct pte *pte; 82 83 /* 84 * Initialize the DMA tag used for sgmap-mapped DMA. 85 */ 86 t = &sc->sc_dmatag; 87 t->_cookie = sc; 88 t->_wbase = 0; 89 t->_wsize = 16*1024*1024; 90 t->_boundary = 0; 91 t->_sgmap = &sc->sc_sgmap; 92 t->_dmamap_create = vsbus_bus_dmamap_create_sgmap; 93 t->_dmamap_destroy = vsbus_bus_dmamap_destroy_sgmap; 94 t->_dmamap_load = vsbus_bus_dmamap_load_sgmap; 95 t->_dmamap_load_mbuf = vsbus_bus_dmamap_load_mbuf_sgmap; 96 t->_dmamap_load_uio = vsbus_bus_dmamap_load_uio_sgmap; 97 t->_dm7 t->_dmamap_load_uio = vsbus_bus_dmamap_loa 98 t->_dmamap_load_raw = vsbus_bus_dmamap_load_raw_sgmap; 99 t->_dmamap_unload = vsbus_bus_dmamap_unload_sgmap; 100 t->_dmamap_sync = vsbus_bus_dmamap_sync; 101 102 t->_dmamem_alloc = _bus_dmamem_alloc; 103 t->_dmamem_free = _bus_dmamem_free; 104 t->_dmamem_map = _bus_dmamem_map; 105 t->_dmamem_unmap = _bus_dmamem_unmap; 106 t->_dmamem_mmap = _bus_dmamem_mmap; 107 108 /* 109 * Allocate and map the VS4000 scatter gather map. 110 */ 111 112 pte = (struct pte *)vax_map_physmem(sc->uv_addr, sc->uv_size/VAX_NBPG); 113 if (pte == 0) 114 panic("uba_dma_init"); 115 /* 116 * Initialize the SGMAP. 117 */ 118 vax_sgmap_init(t, &sc->sc_sgmap, "vsbus_sgmap", t->_wbase, t->_wsize, pte, 0); 119 120 } 121 122 /* 123 * Create a VSBUS SGMAP-mapped DMA map. 124 */ 125 int 126 vsbus_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 127 flags, dmamp) 128 bus_dma_tag_t t; 129 bus_size_t size; 130 int nsegments; 131 bus_size_t maxsegsz; 132 bus_size_t boundary; 133 int flags; 134 bus_dmamap_t *dmamp; 135 { 136 bus_dmamap_t map; 137 int error; 138 139 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 140 boundary, flags, dmamp); 141 if (error) 142 return (error); 143 144 map = *dmamp; 145 146 if (flags & BUS_DMA_ALLOCNOW) { 147 error = vax_sgmap_alloc(map, vax_round_page(size), 148 t->_sgmap, flags); 149 if (error) 150 vsbus_bus_dmamap_destroy_sgmap(t, map); 151 } 152 153 return (error); 154 } 155 156 /* 157 * Destroy a VSBUS SGMAP-mapped DMA map. 158 */ 159 static void 160 vsbus_bus_dmamap_destroy_sgmap(t, map) 161 bus_dma_tag_t t; 162 bus_dmamap_t map; 163 { 164 165 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 166 vax_sgmap_free(map, t->_sgmap); 167 168 _bus_dmamap_destroy(t, map); 169 } 170 171 /* 172 * Load a VSBUS SGMAP-mapped DMA map with a linear buffer. 173 */ 174 static int 175 vsbus_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 176 bus_dma_tag_t t; 177 bus_dmamap_t map; 178 void *buf; 179 bus_size_t buflen; 180 struct proc *p; 181 int flags; 182 { 183 return vax_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap); 184 } 185 186 /* 187 * Load a VSBUS SGMAP-mapped DMA map with an mbuf chain. 188 */ 189 static int 190 vsbus_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 191 bus_dma_tag_t t; 192 bus_dmamap_t map; 193 struct mbuf *m; 194 int flags; 195 { 196 return vax_sgmap_load_mbuf(t, map, m, flags, t->_sgmap); 197 } 198 199 /* 200 * Load a VSBUS SGMAP-mapped DMA map with a uio. 201 */ 202 static int 203 vsbus_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 204 bus_dma_tag_t t; 205 bus_dmamap_t map; 206 struct uio *uio; 207 int flags; 208 { 209 return vax_sgmap_load_uio(t, map, uio, flags, t->_sgmap); 210 } 211 212 /* 213 * Load a VSBUS SGMAP-mapped DMA map with raw memory. 214 */ 215 static int 216 vsbus_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 217 bus_dma_tag_t t; 218 bus_dmamap_t map; 219 bus_dma_segment_t *segs; 220 int nsegs; 221 bus_size_t size; 222 int flags; 223 { 224 return vax_sgmap_load_raw(t, map, segs, nsegs, size, flags, t->_sgmap); 225 } 226 227 /* 228 * Unload a VSBUS DMA map. 229 */ 230 static void 231 vsbus_bus_dmamap_unload_sgmap(t, map) 232 bus_dma_tag_t t; 233 bus_dmamap_t map; 234 { 235 /* 236 * Invalidate any SGMAP page table entries used by this 237 * mapping. 238 */ 239 vax_sgmap_unload(t, map, t->_sgmap); 240 241 /* 242 * Do the generic bits of the unload. 243 */ 244 _bus_dmamap_unload(t, map); 245 } 246 247 /* 248 * Sync the bus map. 249 */ 250 static void 251 vsbus_bus_dmamap_sync(tag, dmam, offset, len, ops) 252 bus_dma_tag_t tag; 253 bus_dmamap_t dmam; 254 bus_addr_t offset; 255 bus_size_t len; 256 int ops; 257 { 258 /* not needed */ 259 } 260
Indexes created Mon Sep 29 21:09:56 GMT 2025