uba_dma.c revision 1.7
1 /* $NetBSD: uba_dma.c,v 1.7 2003/07/15 02:15:02 lukem 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 #include <sys/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: uba_dma.c,v 1.7 2003/07/15 02:15:02 lukem Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/device.h> 47 #include <sys/malloc.h> 48 #include <uvm/uvm_extern.h> 49 50 #define _VAX_BUS_DMA_PRIVATE 51 #include <machine/bus.h> 52 #include <machine/cpu.h> 53 #include <machine/sgmap.h> 54 55 #include <dev/qbus/ubavar.h> 56 57 #include <arch/vax/uba/uba_common.h> 58 59 int uba_bus_dmamap_create_sgmap __P((bus_dma_tag_t, bus_size_t, int, 60 bus_size_t, bus_size_t, int, bus_dmamap_t *)); 61 62 void uba_bus_dmamap_destroy_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); 63 64 int uba_bus_dmamap_load_sgmap __P((bus_dma_tag_t, bus_dmamap_t, void *, 65 bus_size_t, struct proc *, int)); 66 67 int uba_bus_dmamap_load_mbuf_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 68 struct mbuf *, int)); 69 70 int uba_bus_dmamap_load_uio_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 71 struct uio *, int)); 72 73 int uba_bus_dmamap_load_raw_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 74 bus_dma_segment_t *, int, bus_size_t, int)); 75 76 void uba_bus_dmamap_unload_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); 77 78 void uba_bus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 79 bus_size_t, int)); 80 81 void 82 uba_dma_init(sc) 83 struct uba_vsoftc *sc; 84 { 85 bus_dma_tag_t t; 86 struct pte *pte; 87 88 /* 89 * Initialize the DMA tag used for sgmap-mapped DMA. 90 */ 91 t = &sc->uv_dmat; 92 t->_cookie = sc; 93 t->_wbase = 0; 94 t->_wsize = sc->uv_size; 95 t->_boundary = 0; 96 t->_sgmap = &sc->uv_sgmap; 97 t->_dmamap_create = uba_bus_dmamap_create_sgmap; 98 t->_dmamap_destroy = uba_bus_dmamap_destroy_sgmap; 99 t->_dmamap_load = uba_bus_dmamap_load_sgmap; 100 t->_dmamap_load_mbuf = uba_bus_dmamap_load_mbuf_sgmap; 101 t->_dmamap_load_uio = uba_bus_dmamap_load_uio_sgmap; 102 t->_dmamap_load_raw = uba_bus_dmamap_load_raw_sgmap; 103 t->_dmamap_unload = uba_bus_dmamap_unload_sgmap; 104 t->_dmamap_sync = uba_bus_dmamap_sync; 105 106 t->_dmamem_alloc = _bus_dmamem_alloc; 107 t->_dmamem_free = _bus_dmamem_free; 108 t->_dmamem_map = _bus_dmamem_map; 109 t->_dmamem_unmap = _bus_dmamem_unmap; 110 t->_dmamem_mmap = _bus_dmamem_mmap; 111 112 /* 113 * Map in Unibus map registers, if not mapped in already. 114 */ 115 if (sc->uv_uba) { 116 pte = sc->uv_uba->uba_map; 117 } else { 118 pte = (struct pte *)vax_map_physmem(sc->uv_addr, 119 vax_btoc(vax_btoc(sc->uv_size) * sizeof(struct pte))); 120 if (pte == 0) 121 panic("uba_dma_init"); 122 } 123 /* 124 * Initialize the SGMAP. 125 */ 126 vax_sgmap_init(t, &sc->uv_sgmap, "uba_sgmap", 0, sc->uv_size, pte, 0); 127 128 } 129 130 /* 131 * Create a UBA SGMAP-mapped DMA map. 132 */ 133 int 134 uba_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 135 flags, dmamp) 136 bus_dma_tag_t t; 137 bus_size_t size; 138 int nsegments; 139 bus_size_t maxsegsz; 140 bus_size_t boundary; 141 int flags; 142 bus_dmamap_t *dmamp; 143 { 144 bus_dmamap_t map; 145 int error; 146 147 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 148 boundary, flags, dmamp); 149 if (error) 150 return (error); 151 152 map = *dmamp; 153 154 if (flags & BUS_DMA_ALLOCNOW) { 155 error = vax_sgmap_alloc(map, vax_round_page(size), 156 t->_sgmap, flags); 157 if (error) 158 uba_bus_dmamap_destroy_sgmap(t, map); 159 } 160 161 return (error); 162 } 163 164 /* 165 * Destroy a UBA SGMAP-mapped DMA map. 166 */ 167 void 168 uba_bus_dmamap_destroy_sgmap(t, map) 169 bus_dma_tag_t t; 170 bus_dmamap_t map; 171 { 172 173 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 174 vax_sgmap_free(map, t->_sgmap); 175 176 _bus_dmamap_destroy(t, map); 177 } 178 179 /* 180 * Load a UBA SGMAP-mapped DMA map with a linear buffer. 181 */ 182 int 183 uba_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 184 bus_dma_tag_t t; 185 bus_dmamap_t map; 186 void *buf; 187 bus_size_t buflen; 188 struct proc *p; 189 int flags; 190 { 191 int error; 192 193 error = vax_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap); 194 /* 195 * XXX - Set up BDPs. 196 */ 197 198 return (error); 199 } 200 201 /* 202 * Load a UBA SGMAP-mapped DMA map with an mbuf chain. 203 */ 204 int 205 uba_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 206 bus_dma_tag_t t; 207 bus_dmamap_t map; 208 struct mbuf *m; 209 int flags; 210 { 211 int error; 212 213 error = vax_sgmap_load_mbuf(t, map, m, flags, t->_sgmap); 214 215 return (error); 216 } 217 218 /* 219 * Load a UBA SGMAP-mapped DMA map with a uio. 220 */ 221 int 222 uba_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 223 bus_dma_tag_t t; 224 bus_dmamap_t map; 225 struct uio *uio; 226 int flags; 227 { 228 int error; 229 230 error = vax_sgmap_load_uio(t, map, uio, flags, t->_sgmap); 231 232 return (error); 233 } 234 235 /* 236 * Load a UBA SGMAP-mapped DMA map with raw memory. 237 */ 238 int 239 uba_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 240 bus_dma_tag_t t; 241 bus_dmamap_t map; 242 bus_dma_segment_t *segs; 243 int nsegs; 244 bus_size_t size; 245 int flags; 246 { 247 int error; 248 249 error = vax_sgmap_load_raw(t, map, segs, nsegs, size, flags, 250 t->_sgmap); 251 252 return (error); 253 } 254 255 /* 256 * Unload a UBA DMA map. 257 */ 258 void 259 uba_bus_dmamap_unload_sgmap(t, map) 260 bus_dma_tag_t t; 261 bus_dmamap_t map; 262 { 263 264 /* 265 * Invalidate any SGMAP page table entries used by this 266 * mapping. 267 */ 268 vax_sgmap_unload(t, map, t->_sgmap); 269 270 /* 271 * Do the generic bits of the unload. 272 */ 273 _bus_dmamap_unload(t, map); 274 } 275 276 /* 277 * Sync the bus map. This is only needed if BDP's are used. 278 */ 279 void 280 uba_bus_dmamap_sync(tag, dmam, offset, len, ops) 281 bus_dma_tag_t tag; 282 bus_dmamap_t dmam; 283 bus_addr_t offset; 284 bus_size_t len; 285 int ops; 286 { 287 /* Only BDP handling, but not yet. */ 288 } 289
Indexes created Mon Sep 29 21:09:56 GMT 2025