vsbus_dma.c revision 1.14
1/* $NetBSD: vsbus_dma.c,v 1.14 2008/03/11 05:34:03 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#include <sys/cdefs.h> 41__KERNEL_RCSID(0, "$NetBSD: vsbus_dma.c,v 1.14 2008/03/11 05:34:03 matt 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 sgmap_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 sgmap_bus_dmamap_destroy_sgmap(bus_dma_tag_t, bus_dmamap_t); 61 62static int sgmap_bus_dmamap_load_sgmap(bus_dma_tag_t, bus_dmamap_t, void *, 63 bus_size_t, struct proc *, int); 64 65static int sgmap_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t, bus_dmamap_t, 66 struct mbuf *, int); 67 68static int sgmap_bus_dmamap_load_uio_sgmap(bus_dma_tag_t, bus_dmamap_t, 69 struct uio *, int); 70 71static int sgmap_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 sgmap_bus_dmamap_unload_sgmap(bus_dma_tag_t, bus_dmamap_t); 75 76static void sgmap_bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 77 bus_size_t, int); 78 79void 80vax_sgmap_dmatag_init(bus_dma_tag_t t, void *cookie, size_t ptecnt) 81{ 82 /* 83 * Initialize the DMA tag used for sgmap-mapped DMA. 84 */ 85 t->_cookie = cookie; 86 t->_wbase = 0; 87 t->_wsize = ptecnt * VAX_NBPG; 88 t->_boundary = 0; 89 t->_dmamap_create = sgmap_bus_dmamap_create_sgmap; 90 t->_dmamap_destroy = sgmap_bus_dmamap_destroy_sgmap; 91 t->_dmamap_load = sgmap_bus_dmamap_load_sgmap; 92 t->_dmamap_load_mbuf = sgmap_bus_dmamap_load_mbuf_sgmap; 93 t->_dmamap_load_uio = sgmap_bus_dmamap_load_uio_sgmap; 94 t->_dmamap_load_raw = sgmap_bus_dmamap_load_raw_sgmap; 95 t->_dmamap_unload = sgmap_bus_dmamap_unload_sgmap; 96 t->_dmamap_sync = sgmap_bus_dmamap_sync; 97 98 t->_dmamem_alloc = _bus_dmamem_alloc; 99 t->_dmamem_free = _bus_dmamem_free; 100 t->_dmamem_map = _bus_dmamem_map; 101 t->_dmamem_unmap = _bus_dmamem_unmap; 102 t->_dmamem_mmap = _bus_dmamem_mmap; 103} 104 105void 106vsbus_dma_init(struct vsbus_softc *sc, unsigned ptecnt) 107{ 108 bus_dma_tag_t t = &sc->sc_dmatag; 109 bus_dma_segment_t segs[1]; 110 struct pte *pte; 111 int nsegs; 112 int error; 113 size_t mapsize = ptecnt * sizeof(struct pte); 114 115 vax_sgmap_dmatag_init(t, sc, ptecnt); 116 117 t->_sgmap = &sc->sc_sgmap; 118 119 if (vax_boardtype == VAX_BTYP_46 || vax_boardtype == VAX_BTYP_48) { 120 /* 121 * Allocate and map the VS4000 scatter gather map. 122 */ 123 error = bus_dmamem_alloc(t, mapsize, mapsize, mapsize, 124 segs, 1, &nsegs, BUS_DMA_NOWAIT); 125 if (error) { 126 panic("vsbus_dma_init: error allocating memory for " 127 "hw sgmap: error=%d", error); 128 } 129 130 error = bus_dmamem_map(t, segs, nsegs, mapsize, 131 (void **)(void *) &pte, BUS_DMA_NOWAIT|BUS_DMA_COHERENT); 132 if (error) { 133 panic("vsbus_dma_init: error mapping memory for " 134 "hw sgmap: error=%d", error); 135 } 136 memset(pte, 0, mapsize); 137 *(int *) (sc->sc_vsregs + 8) = segs->ds_addr; /* set MAP BASE 0x2008008 */ 138 } else { 139 pte = (struct pte *) vax_map_physmem(KA49_SCSIMAP, mapsize / VAX_NBPG); 140 for (nsegs = ptecnt; nsegs > 0; ) { 141 ((uint32_t *) pte)[--nsegs] = 0; 142 } 143 segs->ds_addr = KA49_SCSIMAP; 144 } 145 aprint_normal_dev(sc->sc_dev, 146 "%uK entry DMA SGMAP at PA 0x%lx (VA %p)\n", 147 ptecnt / 1024, segs->ds_addr, pte); 148 149 /* 150 * Initialize the SGMAP. 151 */ 152 vax_sgmap_init(t, &sc->sc_sgmap, "vsbus_sgmap", t->_wbase, t->_wsize, pte, 0); 153 154} 155 156/* 157 * Create a VSBUS SGMAP-mapped DMA map. 158 */ 159int 160sgmap_bus_dmamap_create_sgmap(bus_dma_tag_t t, bus_size_t size, int nsegments, 161 bus_size_t maxsegsz, bus_size_t boundary, 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 sgmap_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 188sgmap_bus_dmamap_destroy_sgmap(bus_dma_tag_t t, 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 201sgmap_bus_dmamap_load_sgmap(bus_dma_tag_t t, bus_dmamap_t map, void *buf, 202 bus_size_t buflen, struct proc *p, int flags) 203{ 204 return vax_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap); 205} 206 207/* 208 * Load a VSBUS SGMAP-mapped DMA map with an mbuf chain. 209 */ 210static int 211sgmap_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t t, bus_dmamap_t map, 212 struct mbuf *m, 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 221sgmap_bus_dmamap_load_uio_sgmap(bus_dma_tag_t t, bus_dmamap_t map, 222 struct uio *uio, int flags) 223{ 224 return vax_sgmap_load_uio(t, map, uio, flags, t->_sgmap); 225} 226 227/* 228 * Load a VSBUS SGMAP-mapped DMA map with raw memory. 229 */ 230static int 231sgmap_bus_dmamap_load_raw_sgmap(bus_dma_tag_t t, bus_dmamap_t map, 232 bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags) 233{ 234 return vax_sgmap_load_raw(t, map, segs, nsegs, size, flags, t->_sgmap); 235} 236 237/* 238 * Unload a VSBUS DMA map. 239 */ 240static void 241sgmap_bus_dmamap_unload_sgmap(bus_dma_tag_t t, bus_dmamap_t map) 242{ 243 /* 244 * Invalidate any SGMAP page table entries used by this 245 * mapping. 246 */ 247 vax_sgmap_unload(t, map, t->_sgmap); 248 249 /* 250 * Do the generic bits of the unload. 251 */ 252 _bus_dmamap_unload(t, map); 253} 254 255/* 256 * Sync the bus map. 257 */ 258static void 259sgmap_bus_dmamap_sync(bus_dma_tag_t tag, bus_dmamap_t dmam, bus_addr_t offset, 260 bus_size_t len, int ops) 261{ 262 /* not needed */ 263} 264