vsbus_dma.c revision 1.2
1/* $NetBSD: vsbus_dma.c,v 1.2 2000/03/04 00:22:37 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 vs_regs = vax_map_physmem(VS_REGS, 1); 129 *(int *) (vs_regs + 8) = segs->ds_addr; /* set MAP BASE 0x2008008 */ 130 vax_unmap_physmem(vs_regs, 1); 131 132 /* 133 * Initialize the SGMAP. 134 */ 135 vax_sgmap_init(t, &sc->sc_sgmap, "vsbus_sgmap", t->_wbase, t->_wsize, pte, 0); 136 137} 138 139/* 140 * Create a VSBUS SGMAP-mapped DMA map. 141 */ 142int 143vsbus_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 144 flags, dmamp) 145 bus_dma_tag_t t; 146 bus_size_t size; 147 int nsegments; 148 bus_size_t maxsegsz; 149 bus_size_t boundary; 150 int flags; 151 bus_dmamap_t *dmamp; 152{ 153 bus_dmamap_t map; 154 int error; 155 156 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 157 boundary, flags, dmamp); 158 if (error) 159 return (error); 160 161 map = *dmamp; 162 163 if (flags & BUS_DMA_ALLOCNOW) { 164 error = vax_sgmap_alloc(map, vax_round_page(size), 165 t->_sgmap, flags); 166 if (error) 167 vsbus_bus_dmamap_destroy_sgmap(t, map); 168 } 169 170 return (error); 171} 172 173/* 174 * Destroy a VSBUS SGMAP-mapped DMA map. 175 */ 176static void 177vsbus_bus_dmamap_destroy_sgmap(t, map) 178 bus_dma_tag_t t; 179 bus_dmamap_t map; 180{ 181 182 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 183 vax_sgmap_free(map, t->_sgmap); 184 185 _bus_dmamap_destroy(t, map); 186} 187 188/* 189 * Load a VSBUS SGMAP-mapped DMA map with a linear buffer. 190 */ 191static int 192vsbus_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 193 bus_dma_tag_t t; 194 bus_dmamap_t map; 195 void *buf; 196 bus_size_t buflen; 197 struct proc *p; 198 int flags; 199{ 200 return vax_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap); 201} 202 203/* 204 * Load a VSBUS SGMAP-mapped DMA map with an mbuf chain. 205 */ 206static int 207vsbus_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 208 bus_dma_tag_t t; 209 bus_dmamap_t map; 210 struct mbuf *m; 211 int flags; 212{ 213 return vax_sgmap_load_mbuf(t, map, m, flags, t->_sgmap); 214} 215 216/* 217 * Load a VSBUS SGMAP-mapped DMA map with a uio. 218 */ 219static int 220vsbus_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 221 bus_dma_tag_t t; 222 bus_dmamap_t map; 223 struct uio *uio; 224 int flags; 225{ 226 return vax_sgmap_load_uio(t, map, uio, flags, t->_sgmap); 227} 228 229/* 230 * Load a VSBUS SGMAP-mapped DMA map with raw memory. 231 */ 232static int 233vsbus_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 234 bus_dma_tag_t t; 235 bus_dmamap_t map; 236 bus_dma_segment_t *segs; 237 int nsegs; 238 bus_size_t size; 239 int flags; 240{ 241 return vax_sgmap_load_raw(t, map, segs, nsegs, size, flags, t->_sgmap); 242} 243 244/* 245 * Unload a VSBUS DMA map. 246 */ 247static void 248vsbus_bus_dmamap_unload_sgmap(t, map) 249 bus_dma_tag_t t; 250 bus_dmamap_t map; 251{ 252 /* 253 * Invalidate any SGMAP page table entries used by this 254 * mapping. 255 */ 256 vax_sgmap_unload(t, map, t->_sgmap); 257 258 /* 259 * Do the generic bits of the unload. 260 */ 261 _bus_dmamap_unload(t, map); 262} 263 264/* 265 * Sync the bus map. 266 */ 267static void 268vsbus_bus_dmamap_sync(tag, dmam, offset, len, ops) 269 bus_dma_tag_t tag; 270 bus_dmamap_t dmam; 271 bus_addr_t offset; 272 bus_size_t len; 273 int ops; 274{ 275 /* not needed */ 276} 277