vsbus_dma.c revision 1.8
1/* $NetBSD: vsbus_dma.c,v 1.8 2000/11/16 19:25:42 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 <uvm/uvm_extern.h> 47 48#define _VAX_BUS_DMA_PRIVATE 49#include <machine/bus.h> 50#include <machine/cpu.h> 51#include <machine/sid.h> 52#include <machine/sgmap.h> 53#include <machine/vsbus.h> 54 55static int vsbus_bus_dmamap_create_sgmap(bus_dma_tag_t, bus_size_t, int, 56 bus_size_t, bus_size_t, int, bus_dmamap_t *); 57 58static void vsbus_bus_dmamap_destroy_sgmap(bus_dma_tag_t, bus_dmamap_t); 59 60static int vsbus_bus_dmamap_load_sgmap(bus_dma_tag_t, bus_dmamap_t, void *, 61 bus_size_t, struct proc *, int); 62 63static int vsbus_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t, bus_dmamap_t, 64 struct mbuf *, int); 65 66static int vsbus_bus_dmamap_load_uio_sgmap(bus_dma_tag_t, bus_dmamap_t, 67 struct uio *, int); 68 69static int vsbus_bus_dmamap_load_raw_sgmap(bus_dma_tag_t, bus_dmamap_t, 70 bus_dma_segment_t *, int, bus_size_t, int); 71 72static void vsbus_bus_dmamap_unload_sgmap(bus_dma_tag_t, bus_dmamap_t); 73 74static void vsbus_bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 75 bus_size_t, int); 76 77void 78vsbus_dma_init(sc, ptecnt) 79 struct vsbus_softc *sc; 80 unsigned ptecnt; 81{ 82 bus_dma_tag_t t; 83 bus_dma_segment_t segs[1]; 84 struct pte *pte; 85 int nsegs, error; 86 unsigned mapsize = ptecnt * sizeof(struct pte); 87 88 /* 89 * Initialize the DMA tag used for sgmap-mapped DMA. 90 */ 91 t = &sc->sc_dmatag; 92 t->_cookie = sc; 93 t->_wbase = 0; 94 t->_wsize = ptecnt * VAX_NBPG; 95 t->_boundary = 0; 96 t->_sgmap = &sc->sc_sgmap; 97 t->_dmamap_create = vsbus_bus_dmamap_create_sgmap; 98 t->_dmamap_destroy = vsbus_bus_dmamap_destroy_sgmap; 99 t->_dmamap_load = vsbus_bus_dmamap_load_sgmap; 100 t->_dmamap_load_mbuf = vsbus_bus_dmamap_load_mbuf_sgmap; 101 t->_dmamap_load_uio = vsbus_bus_dmamap_load_uio_sgmap; 102 t->_dmamap_load_raw = vsbus_bus_dmamap_load_raw_sgmap; 103 t->_dmamap_unload = vsbus_bus_dmamap_unload_sgmap; 104 t->_dmamap_sync = vsbus_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 if (vax_boardtype == VAX_BTYP_46 || vax_boardtype == VAX_BTYP_48) { 113 /* 114 * Allocate and map the VS4000 scatter gather map. 115 */ 116 error = bus_dmamem_alloc(t, mapsize, mapsize, mapsize, 117 segs, 1, &nsegs, BUS_DMA_NOWAIT); 118 if (error) { 119 panic("vsbus_dma_init: error allocating memory for " 120 "hw sgmap: error=%d", error); 121 } 122 123 error = bus_dmamem_map(t, segs, nsegs, mapsize, 124 (caddr_t *) &pte, BUS_DMA_NOWAIT|BUS_DMA_COHERENT); 125 if (error) { 126 panic("vsbus_dma_init: error mapping memory for " 127 "hw sgmap: error=%d", error); 128 } 129 memset(pte, 0, mapsize); 130 *(int *) (sc->sc_vsregs + 8) = segs->ds_addr; /* set MAP BASE 0x2008008 */ 131 } else { 132 pte = (struct pte *) vax_map_physmem(KA49_SCSIMAP, mapsize / VAX_NBPG); 133 for (nsegs = ptecnt; nsegs > 0; ) { 134 ((u_int32_t *) pte)[--nsegs] = 0; 135 } 136 segs->ds_addr = KA49_SCSIMAP; 137 } 138 printf("%s: %uK entry DMA SGMAP at PA 0x%lx (VA %p)\n", 139 sc->sc_dev.dv_xname, ptecnt / 1024, segs->ds_addr, pte); 140 141 /* 142 * Initialize the SGMAP. 143 */ 144 vax_sgmap_init(t, &sc->sc_sgmap, "vsbus_sgmap", t->_wbase, t->_wsize, pte, 0); 145 146} 147 148/* 149 * Create a VSBUS SGMAP-mapped DMA map. 150 */ 151int 152vsbus_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 153 flags, dmamp) 154 bus_dma_tag_t t; 155 bus_size_t size; 156 int nsegments; 157 bus_size_t maxsegsz; 158 bus_size_t boundary; 159 int flags; 160 bus_dmamap_t *dmamp; 161{ 162 bus_dmamap_t map; 163 int error; 164 165 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 166 boundary, flags, dmamp); 167 if (error) 168 return (error); 169 170 map = *dmamp; 171 172 if (flags & BUS_DMA_ALLOCNOW) { 173 error = vax_sgmap_alloc(map, vax_round_page(size), 174 t->_sgmap, flags); 175 if (error) 176 vsbus_bus_dmamap_destroy_sgmap(t, map); 177 } 178 179 return (error); 180} 181 182/* 183 * Destroy a VSBUS SGMAP-mapped DMA map. 184 */ 185static void 186vsbus_bus_dmamap_destroy_sgmap(t, map) 187 bus_dma_tag_t t; 188 bus_dmamap_t map; 189{ 190 191 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 192 vax_sgmap_free(map, t->_sgmap); 193 194 _bus_dmamap_destroy(t, map); 195} 196 197/* 198 * Load a VSBUS SGMAP-mapped DMA map with a linear buffer. 199 */ 200static int 201vsbus_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 202 bus_dma_tag_t t; 203 bus_dmamap_t map; 204 void *buf; 205 bus_size_t buflen; 206 struct proc *p; 207 int flags; 208{ 209 return vax_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap); 210} 211 212/* 213 * Load a VSBUS SGMAP-mapped DMA map with an mbuf chain. 214 */ 215static int 216vsbus_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 217 bus_dma_tag_t t; 218 bus_dmamap_t map; 219 struct mbuf *m; 220 int flags; 221{ 222 return vax_sgmap_load_mbuf(t, map, m, flags, t->_sgmap); 223} 224 225/* 226 * Load a VSBUS SGMAP-mapped DMA map with a uio. 227 */ 228static int 229vsbus_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 230 bus_dma_tag_t t; 231 bus_dmamap_t map; 232 struct uio *uio; 233 int flags; 234{ 235 return vax_sgmap_load_uio(t, map, uio, flags, t->_sgmap); 236} 237 238/* 239 * Load a VSBUS SGMAP-mapped DMA map with raw memory. 240 */ 241static int 242vsbus_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 243 bus_dma_tag_t t; 244 bus_dmamap_t map; 245 bus_dma_segment_t *segs; 246 int nsegs; 247 bus_size_t size; 248 int flags; 249{ 250 return vax_sgmap_load_raw(t, map, segs, nsegs, size, flags, t->_sgmap); 251} 252 253/* 254 * Unload a VSBUS DMA map. 255 */ 256static void 257vsbus_bus_dmamap_unload_sgmap(t, map) 258 bus_dma_tag_t t; 259 bus_dmamap_t map; 260{ 261 /* 262 * Invalidate any SGMAP page table entries used by this 263 * mapping. 264 */ 265 vax_sgmap_unload(t, map, t->_sgmap); 266 267 /* 268 * Do the generic bits of the unload. 269 */ 270 _bus_dmamap_unload(t, map); 271} 272 273/* 274 * Sync the bus map. 275 */ 276static void 277vsbus_bus_dmamap_sync(tag, dmam, offset, len, ops) 278 bus_dma_tag_t tag; 279 bus_dmamap_t dmam; 280 bus_addr_t offset; 281 bus_size_t len; 282 int ops; 283{ 284 /* not needed */ 285} 286