vsbus_dma.c revision 1.6
1/* $NetBSD: vsbus_dma.c,v 1.6 2000/06/29 07:14:37 mrg 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 __P((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 __P((bus_dma_tag_t, bus_dmamap_t)); 59 60static int vsbus_bus_dmamap_load_sgmap __P((bus_dma_tag_t, bus_dmamap_t, void *, 61 bus_size_t, struct proc *, int)); 62 63static int vsbus_bus_dmamap_load_mbuf_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 64 struct mbuf *, int)); 65 66static int vsbus_bus_dmamap_load_uio_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 67 struct uio *, int)); 68 69static int vsbus_bus_dmamap_load_raw_sgmap __P((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 __P((bus_dma_tag_t, bus_dmamap_t)); 73 74static void vsbus_bus_dmamap_sync __P((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 sc->sc_sgmap.aps_flags |= SGMAP_KA49; 133 pte = (struct pte *) vax_map_physmem(KA49_SCSIMAP, mapsize / VAX_NBPG); 134 for (nsegs = ptecnt; nsegs > 0; ) { 135 ((u_int32_t *) pte)[--nsegs] = 0x88000000; 136 } 137 segs->ds_addr = KA49_SCSIMAP; 138 } 139 printf("%s: %uK entry DMA SGMAP at PA 0x%lx (VA %p)\n", 140 sc->sc_dev.dv_xname, ptecnt / 1024, segs->ds_addr, pte); 141 142 /* 143 * Initialize the SGMAP. 144 */ 145 vax_sgmap_init(t, &sc->sc_sgmap, "vsbus_sgmap", t->_wbase, t->_wsize, pte, 0); 146 147} 148 149/* 150 * Create a VSBUS SGMAP-mapped DMA map. 151 */ 152int 153vsbus_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 154 flags, dmamp) 155 bus_dma_tag_t t; 156 bus_size_t size; 157 int nsegments; 158 bus_size_t maxsegsz; 159 bus_size_t boundary; 160 int flags; 161 bus_dmamap_t *dmamp; 162{ 163 bus_dmamap_t map; 164 int error; 165 166 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 167 boundary, flags, dmamp); 168 if (error) 169 return (error); 170 171 map = *dmamp; 172 173 if (flags & BUS_DMA_ALLOCNOW) { 174 error = vax_sgmap_alloc(map, vax_round_page(size), 175 t->_sgmap, flags); 176 if (error) 177 vsbus_bus_dmamap_destroy_sgmap(t, map); 178 } 179 180 return (error); 181} 182 183/* 184 * Destroy a VSBUS SGMAP-mapped DMA map. 185 */ 186static void 187vsbus_bus_dmamap_destroy_sgmap(t, map) 188 bus_dma_tag_t t; 189 bus_dmamap_t map; 190{ 191 192 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 193 vax_sgmap_free(map, t->_sgmap); 194 195 _bus_dmamap_destroy(t, map); 196} 197 198/* 199 * Load a VSBUS SGMAP-mapped DMA map with a linear buffer. 200 */ 201static int 202vsbus_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 203 bus_dma_tag_t t; 204 bus_dmamap_t map; 205 void *buf; 206 bus_size_t buflen; 207 struct proc *p; 208 int flags; 209{ 210 return vax_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap); 211} 212 213/* 214 * Load a VSBUS SGMAP-mapped DMA map with an mbuf chain. 215 */ 216static int 217vsbus_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 218 bus_dma_tag_t t; 219 bus_dmamap_t map; 220 struct mbuf *m; 221 int flags; 222{ 223 return vax_sgmap_load_mbuf(t, map, m, flags, t->_sgmap); 224} 225 226/* 227 * Load a VSBUS SGMAP-mapped DMA map with a uio. 228 */ 229static int 230vsbus_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 231 bus_dma_tag_t t; 232 bus_dmamap_t map; 233 struct uio *uio; 234 int flags; 235{ 236 return vax_sgmap_load_uio(t, map, uio, flags, t->_sgmap); 237} 238 239/* 240 * Load a VSBUS SGMAP-mapped DMA map with raw memory. 241 */ 242static int 243vsbus_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 244 bus_dma_tag_t t; 245 bus_dmamap_t map; 246 bus_dma_segment_t *segs; 247 int nsegs; 248 bus_size_t size; 249 int flags; 250{ 251 return vax_sgmap_load_raw(t, map, segs, nsegs, size, flags, t->_sgmap); 252} 253 254/* 255 * Unload a VSBUS DMA map. 256 */ 257static void 258vsbus_bus_dmamap_unload_sgmap(t, map) 259 bus_dma_tag_t t; 260 bus_dmamap_t map; 261{ 262 /* 263 * Invalidate any SGMAP page table entries used by this 264 * mapping. 265 */ 266 vax_sgmap_unload(t, map, t->_sgmap); 267 268 /* 269 * Do the generic bits of the unload. 270 */ 271 _bus_dmamap_unload(t, map); 272} 273 274/* 275 * Sync the bus map. 276 */ 277static void 278vsbus_bus_dmamap_sync(tag, dmam, offset, len, ops) 279 bus_dma_tag_t tag; 280 bus_dmamap_t dmam; 281 bus_addr_t offset; 282 bus_size_t len; 283 int ops; 284{ 285 /* not needed */ 286} 287