vsbus_dma.c revision 1.3
1/* $NetBSD: vsbus_dma.c,v 1.3 2000/03/07 00:07:16 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 54static 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 57static void vsbus_bus_dmamap_destroy_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); 58 59static int vsbus_bus_dmamap_load_sgmap __P((bus_dma_tag_t, bus_dmamap_t, void *, 60 bus_size_t, struct proc *, int)); 61 62static int vsbus_bus_dmamap_load_mbuf_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 63 struct mbuf *, int)); 64 65static int vsbus_bus_dmamap_load_uio_sgmap __P((bus_dma_tag_t, bus_dmamap_t, 66 struct uio *, int)); 67 68static 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 71static void vsbus_bus_dmamap_unload_sgmap __P((bus_dma_tag_t, bus_dmamap_t)); 72 73static void vsbus_bus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 74 bus_size_t, int)); 75 76void 77vsbus_dma_init(sc) 78 struct vsbus_softc *sc; 79{ 80 bus_dma_tag_t t; 81 bus_dma_segment_t segs[1]; 82 struct pte *pte; 83 int nsegs, error; 84 vaddr_t vs_regs; 85 86 /* 87 * Initialize the DMA tag used for sgmap-mapped DMA. 88 */ 89 t = &sc->sc_dmatag; 90 t->_cookie = sc; 91 t->_wbase = 0; 92 t->_wsize = 16*1024*1024; 93 t->_boundary = 0; 94 t->_sgmap = &sc->sc_sgmap; 95 t->_dmamap_create = vsbus_bus_dmamap_create_sgmap; 96 t->_dmamap_destroy = vsbus_bus_dmamap_destroy_sgmap; 97 t->_dmamap_load = vsbus_bus_dmamap_load_sgmap; 98 t->_dmamap_load_mbuf = vsbus_bus_dmamap_load_mbuf_sgmap; 99 t->_dmamap_load_uio = vsbus_bus_dmamap_load_uio_sgmap; 100 t->_dmamap_load_raw = vsbus_bus_dmamap_load_raw_sgmap; 101 t->_dmamap_unload = vsbus_bus_dmamap_unload_sgmap; 102 t->_dmamap_sync = vsbus_bus_dmamap_sync; 103 104 t->_dmamem_alloc = _bus_dmamem_alloc; 105 t->_dmamem_free = _bus_dmamem_free; 106 t->_dmamem_map = _bus_dmamem_map; 107 t->_dmamem_unmap = _bus_dmamem_unmap; 108 t->_dmamem_mmap = _bus_dmamem_mmap; 109 110 /* 111 * Allocate and map the VS4000 scatter gather map. 112 */ 113 error = bus_dmamem_alloc(t, 0x20000, 0x20000, 0x20000, 114 segs, 1, &nsegs, BUS_DMA_NOWAIT); 115 if (error) { 116 panic("vsbus_dma_init: error allocating memory for hw sgmap" 117 ": error=%d", error); 118 } 119 120 error = bus_dmamem_map(t, segs, nsegs, 0x20000, 121 (caddr_t *) &pte, BUS_DMA_NOWAIT|BUS_DMA_COHERENT); 122 if (error) { 123 panic("vsbus_dma_init: error mapping memory for hw sgmap" 124 ": error=%d", error); 125 } 126 printf("%s: 32K entry DMA SGMAP at PA 0x%lx (VA %p)\n", 127 sc->sc_dev.dv_xname, segs->ds_addr, pte); 128 memset(pte, 0, 0x20000); 129 vs_regs = vax_map_physmem(VS_REGS, 1); 130 *(int *) (vs_regs + 8) = segs->ds_addr; /* set MAP BASE 0x2008008 */ 131 vax_unmap_physmem(vs_regs, 1); 132 133 /* 134 * Initialize the SGMAP. 135 */ 136 vax_sgmap_init(t, &sc->sc_sgmap, "vsbus_sgmap", t->_wbase, t->_wsize, pte, 0); 137 138} 139 140/* 141 * Create a VSBUS SGMAP-mapped DMA map. 142 */ 143int 144vsbus_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 145 flags, dmamp) 146 bus_dma_tag_t t; 147 bus_size_t size; 148 int nsegments; 149 bus_size_t maxsegsz; 150 bus_size_t boundary; 151 int flags; 152 bus_dmamap_t *dmamp; 153{ 154 bus_dmamap_t map; 155 int error; 156 157 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 158 boundary, flags, dmamp); 159 if (error) 160 return (error); 161 162 map = *dmamp; 163 164 if (flags & BUS_DMA_ALLOCNOW) { 165 error = vax_sgmap_alloc(map, vax_round_page(size), 166 t->_sgmap, flags); 167 if (error) 168 vsbus_bus_dmamap_destroy_sgmap(t, map); 169 } 170 171 return (error); 172} 173 174/* 175 * Destroy a VSBUS SGMAP-mapped DMA map. 176 */ 177static void 178vsbus_bus_dmamap_destroy_sgmap(t, map) 179 bus_dma_tag_t t; 180 bus_dmamap_t map; 181{ 182 183 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 184 vax_sgmap_free(map, t->_sgmap); 185 186 _bus_dmamap_destroy(t, map); 187} 188 189/* 190 * Load a VSBUS SGMAP-mapped DMA map with a linear buffer. 191 */ 192static int 193vsbus_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 194 bus_dma_tag_t t; 195 bus_dmamap_t map; 196 void *buf; 197 bus_size_t buflen; 198 struct proc *p; 199 int flags; 200{ 201 return vax_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap); 202} 203 204/* 205 * Load a VSBUS SGMAP-mapped DMA map with an mbuf chain. 206 */ 207static int 208vsbus_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 209 bus_dma_tag_t t; 210 bus_dmamap_t map; 211 struct mbuf *m; 212 int flags; 213{ 214 return vax_sgmap_load_mbuf(t, map, m, flags, t->_sgmap); 215} 216 217/* 218 * Load a VSBUS SGMAP-mapped DMA map with a uio. 219 */ 220static int 221vsbus_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 222 bus_dma_tag_t t; 223 bus_dmamap_t map; 224 struct uio *uio; 225 int flags; 226{ 227 return vax_sgmap_load_uio(t, map, uio, flags, t->_sgmap); 228} 229 230/* 231 * Load a VSBUS SGMAP-mapped DMA map with raw memory. 232 */ 233static int 234vsbus_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 235 bus_dma_tag_t t; 236 bus_dmamap_t map; 237 bus_dma_segment_t *segs; 238 int nsegs; 239 bus_size_t size; 240 int flags; 241{ 242 return vax_sgmap_load_raw(t, map, segs, nsegs, size, flags, t->_sgmap); 243} 244 245/* 246 * Unload a VSBUS DMA map. 247 */ 248static void 249vsbus_bus_dmamap_unload_sgmap(t, map) 250 bus_dma_tag_t t; 251 bus_dmamap_t map; 252{ 253 /* 254 * Invalidate any SGMAP page table entries used by this 255 * mapping. 256 */ 257 vax_sgmap_unload(t, map, t->_sgmap); 258 259 /* 260 * Do the generic bits of the unload. 261 */ 262 _bus_dmamap_unload(t, map); 263} 264 265/* 266 * Sync the bus map. 267 */ 268static void 269vsbus_bus_dmamap_sync(tag, dmam, offset, len, ops) 270 bus_dma_tag_t tag; 271 bus_dmamap_t dmam; 272 bus_addr_t offset; 273 bus_size_t len; 274 int ops; 275{ 276 /* not needed */ 277} 278