vsbus_dma.c revision 1.9
1/* $NetBSD: vsbus_dma.c,v 1.9 2003/07/15 02:15:07 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: vsbus_dma.c,v 1.9 2003/07/15 02:15:07 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/sid.h> 54#include <machine/sgmap.h> 55#include <machine/vsbus.h> 56 57static int vsbus_bus_dmamap_create_sgmap(bus_dma_tag_t, bus_size_t, int, 58 bus_size_t, bus_size_t, int, bus_dmamap_t *); 59 60static void vsbus_bus_dmamap_destroy_sgmap(bus_dma_tag_t, bus_dmamap_t); 61 62static int vsbus_bus_dmamap_load_sgmap(bus_dma_tag_t, bus_dmamap_t, void *, 63 bus_size_t, struct proc *, int); 64 65static int vsbus_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t, bus_dmamap_t, 66 struct mbuf *, int); 67 68static int vsbus_bus_dmamap_load_uio_sgmap(bus_dma_tag_t, bus_dmamap_t, 69 struct uio *, int); 70 71static int vsbus_bus_dmamap_load_raw_sgmap(bus_dma_tag_t, bus_dmamap_t, 72 bus_dma_segment_t *, int, bus_size_t, int); 73 74static void vsbus_bus_dmamap_unload_sgmap(bus_dma_tag_t, bus_dmamap_t); 75 76static void vsbus_bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 77 bus_size_t, int); 78 79void 80vsbus_dma_init(sc, ptecnt) 81 struct vsbus_softc *sc; 82 unsigned ptecnt; 83{ 84 bus_dma_tag_t t; 85 bus_dma_segment_t segs[1]; 86 struct pte *pte; 87 int nsegs, error; 88 unsigned mapsize = ptecnt * sizeof(struct pte); 89 90 /* 91 * Initialize the DMA tag used for sgmap-mapped DMA. 92 */ 93 t = &sc->sc_dmatag; 94 t->_cookie = sc; 95 t->_wbase = 0; 96 t->_wsize = ptecnt * VAX_NBPG; 97 t->_boundary = 0; 98 t->_sgmap = &sc->sc_sgmap; 99 t->_dmamap_create = vsbus_bus_dmamap_create_sgmap; 100 t->_dmamap_destroy = vsbus_bus_dmamap_destroy_sgmap; 101 t->_dmamap_load = vsbus_bus_dmamap_load_sgmap; 102 t->_dmamap_load_mbuf = vsbus_bus_dmamap_load_mbuf_sgmap; 103 t->_dmamap_load_uio = vsbus_bus_dmamap_load_uio_sgmap; 104 t->_dmamap_load_raw = vsbus_bus_dmamap_load_raw_sgmap; 105 t->_dmamap_unload = vsbus_bus_dmamap_unload_sgmap; 106 t->_dmamap_sync = vsbus_bus_dmamap_sync; 107 108 t->_dmamem_alloc = _bus_dmamem_alloc; 109 t->_dmamem_free = _bus_dmamem_free; 110 t->_dmamem_map = _bus_dmamem_map; 111 t->_dmamem_unmap = _bus_dmamem_unmap; 112 t->_dmamem_mmap = _bus_dmamem_mmap; 113 114 if (vax_boardtype == VAX_BTYP_46 || vax_boardtype == VAX_BTYP_48) { 115 /* 116 * Allocate and map the VS4000 scatter gather map. 117 */ 118 error = bus_dmamem_alloc(t, mapsize, mapsize, mapsize, 119 segs, 1, &nsegs, BUS_DMA_NOWAIT); 120 if (error) { 121 panic("vsbus_dma_init: error allocating memory for " 122 "hw sgmap: error=%d", error); 123 } 124 125 error = bus_dmamem_map(t, segs, nsegs, mapsize, 126 (caddr_t *) &pte, BUS_DMA_NOWAIT|BUS_DMA_COHERENT); 127 if (error) { 128 panic("vsbus_dma_init: error mapping memory for " 129 "hw sgmap: error=%d", error); 130 } 131 memset(pte, 0, mapsize); 132 *(int *) (sc->sc_vsregs + 8) = segs->ds_addr; /* set MAP BASE 0x2008008 */ 133 } else { 134 pte = (struct pte *) vax_map_physmem(KA49_SCSIMAP, mapsize / VAX_NBPG); 135 for (nsegs = ptecnt; nsegs > 0; ) { 136 ((u_int32_t *) pte)[--nsegs] = 0; 137 } 138 segs->ds_addr = KA49_SCSIMAP; 139 } 140 printf("%s: %uK entry DMA SGMAP at PA 0x%lx (VA %p)\n", 141 sc->sc_dev.dv_xname, ptecnt / 1024, segs->ds_addr, pte); 142 143 /* 144 * Initialize the SGMAP. 145 */ 146 vax_sgmap_init(t, &sc->sc_sgmap, "vsbus_sgmap", t->_wbase, t->_wsize, pte, 0); 147 148} 149 150/* 151 * Create a VSBUS SGMAP-mapped DMA map. 152 */ 153int 154vsbus_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 155 flags, dmamp) 156 bus_dma_tag_t t; 157 bus_size_t size; 158 int nsegments; 159 bus_size_t maxsegsz; 160 bus_size_t boundary; 161 int flags; 162 bus_dmamap_t *dmamp; 163{ 164 bus_dmamap_t map; 165 int error; 166 167 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 168 boundary, flags, dmamp); 169 if (error) 170 return (error); 171 172 map = *dmamp; 173 174 if (flags & BUS_DMA_ALLOCNOW) { 175 error = vax_sgmap_alloc(map, vax_round_page(size), 176 t->_sgmap, flags); 177 if (error) 178 vsbus_bus_dmamap_destroy_sgmap(t, map); 179 } 180 181 return (error); 182} 183 184/* 185 * Destroy a VSBUS SGMAP-mapped DMA map. 186 */ 187static void 188vsbus_bus_dmamap_destroy_sgmap(t, map) 189 bus_dma_tag_t t; 190 bus_dmamap_t map; 191{ 192 193 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 194 vax_sgmap_free(map, t->_sgmap); 195 196 _bus_dmamap_destroy(t, map); 197} 198 199/* 200 * Load a VSBUS SGMAP-mapped DMA map with a linear buffer. 201 */ 202static int 203vsbus_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 204 bus_dma_tag_t t; 205 bus_dmamap_t map; 206 void *buf; 207 bus_size_t buflen; 208 struct proc *p; 209 int flags; 210{ 211 return vax_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap); 212} 213 214/* 215 * Load a VSBUS SGMAP-mapped DMA map with an mbuf chain. 216 */ 217static int 218vsbus_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 219 bus_dma_tag_t t; 220 bus_dmamap_t map; 221 struct mbuf *m; 222 int flags; 223{ 224 return vax_sgmap_load_mbuf(t, map, m, flags, t->_sgmap); 225} 226 227/* 228 * Load a VSBUS SGMAP-mapped DMA map with a uio. 229 */ 230static int 231vsbus_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 232 bus_dma_tag_t t; 233 bus_dmamap_t map; 234 struct uio *uio; 235 int flags; 236{ 237 return vax_sgmap_load_uio(t, map, uio, flags, t->_sgmap); 238} 239 240/* 241 * Load a VSBUS SGMAP-mapped DMA map with raw memory. 242 */ 243static int 244vsbus_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 245 bus_dma_tag_t t; 246 bus_dmamap_t map; 247 bus_dma_segment_t *segs; 248 int nsegs; 249 bus_size_t size; 250 int flags; 251{ 252 return vax_sgmap_load_raw(t, map, segs, nsegs, size, flags, t->_sgmap); 253} 254 255/* 256 * Unload a VSBUS DMA map. 257 */ 258static void 259vsbus_bus_dmamap_unload_sgmap(t, map) 260 bus_dma_tag_t t; 261 bus_dmamap_t map; 262{ 263 /* 264 * Invalidate any SGMAP page table entries used by this 265 * mapping. 266 */ 267 vax_sgmap_unload(t, map, t->_sgmap); 268 269 /* 270 * Do the generic bits of the unload. 271 */ 272 _bus_dmamap_unload(t, map); 273} 274 275/* 276 * Sync the bus map. 277 */ 278static void 279vsbus_bus_dmamap_sync(tag, dmam, offset, len, ops) 280 bus_dma_tag_t tag; 281 bus_dmamap_t dmam; 282 bus_addr_t offset; 283 bus_size_t len; 284 int ops; 285{ 286 /* not needed */ 287} 288