uba_dma.c revision 1.9.4.1
1 /* $NetBSD: uba_dma.c,v 1.9.4.1 2008/05/16 02:23:24 yamt 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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: uba_dma.c,v 1.9.4.1 2008/05/16 02:23:24 yamt Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/kernel.h> 39 #include <sys/device.h> 40 #include <sys/malloc.h> 41 #include <uvm/uvm_extern.h> 42 43 #define _VAX_BUS_DMA_PRIVATE 44 #include <machine/bus.h> 45 #include <machine/cpu.h> 46 #include <machine/sgmap.h> 47 48 #include <dev/qbus/ubavar.h> 49 50 #include <arch/vax/uba/uba_common.h> 51 52 int uba_bus_dmamap_create_sgmap(bus_dma_tag_t, bus_size_t, int, 53 bus_size_t, bus_size_t, int, bus_dmamap_t *); 54 55 void uba_bus_dmamap_destroy_sgmap(bus_dma_tag_t, bus_dmamap_t); 56 57 int uba_bus_dmamap_load_sgmap(bus_dma_tag_t, bus_dmamap_t, void *, 58 bus_size_t, struct proc *, int); 59 60 int uba_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t, bus_dmamap_t, 61 struct mbuf *, int); 62 63 int uba_bus_dmamap_load_uio_sgmap(bus_dma_tag_t, bus_dmamap_t, 64 struct uio *, int); 65 66 int uba_bus_dmamap_load_raw_sgmap(bus_dma_tag_t, bus_dmamap_t, 67 bus_dma_segment_t *, int, bus_size_t, int); 68 69 void uba_bus_dmamap_unload_sgmap(bus_dma_tag_t, bus_dmamap_t); 70 71 void uba_bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 72 bus_size_t, int); 73 74 void 75 uba_dma_init(struct uba_vsoftc *sc) 76 { 77 bus_dma_tag_t t; 78 struct pte *pte; 79 80 /* 81 * Initialize the DMA tag used for sgmap-mapped DMA. 82 */ 83 t = &sc->uv_dmat; 84 t->_cookie = sc; 85 t->_wbase = 0; 86 t->_wsize = sc->uv_size; 87 t->_boundary = 0; 88 t->_sgmap = &sc->uv_sgmap; 89 t->_dmamap_create = uba_bus_dmamap_create_sgmap; 90 t->_dmamap_destroy = uba_bus_dmamap_destroy_sgmap; 91 t->_dmamap_load = uba_bus_dmamap_load_sgmap; 92 t->_dmamap_load_mbuf = uba_bus_dmamap_load_mbuf_sgmap; 93 t->_dmamap_load_uio = uba_bus_dmamap_load_uio_sgmap; 94 t->_dmamap_load_raw = uba_bus_dmamap_load_raw_sgmap; 95 t->_dmamap_unload = uba_bus_dmamap_unload_sgmap; 96 t->_dmamap_sync = uba_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 /* 105 * Map in Unibus map registers, if not mapped in already. 106 */ 107 if (sc->uv_uba) { 108 pte = sc->uv_uba->uba_map; 109 } else { 110 pte = (struct pte *)vax_map_physmem(sc->uv_addr, 111 vax_btoc(vax_btoc(sc->uv_size) * sizeof(struct pte))); 112 if (pte == 0) 113 panic("uba_dma_init"); 114 } 115 /* 116 * Initialize the SGMAP. 117 */ 118 vax_sgmap_init(t, &sc->uv_sgmap, "uba_sgmap", 0, sc->uv_size, pte, 0); 119 120 } 121 122 /* 123 * Create a UBA SGMAP-mapped DMA map. 124 */ 125 int 126 uba_bus_dmamap_create_sgmap(bus_dma_tag_t t, bus_size_t size, int nsegments, 127 bus_size_t maxsegsz, bus_size_t boundary, int flags, 128 bus_dmamap_t *dmamp) 129 { 130 bus_dmamap_t map; 131 int error; 132 133 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 134 boundary, flags, dmamp); 135 if (error) 136 return (error); 137 138 map = *dmamp; 139 140 if (flags & BUS_DMA_ALLOCNOW) { 141 error = vax_sgmap_alloc(map, vax_round_page(size), 142 t->_sgmap, flags); 143 if (error) 144 uba_bus_dmamap_destroy_sgmap(t, map); 145 } 146 147 return (error); 148 } 149 150 /* 151 * Destroy a UBA SGMAP-mapped DMA map. 152 */ 153 void 154 uba_bus_dmamap_destroy_sgmap(bus_dma_tag_t t, bus_dmamap_t map) 155 { 156 157 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 158 vax_sgmap_free(map, t->_sgmap); 159 160 _bus_dmamap_destroy(t, map); 161 } 162 163 /* 164 * Load a UBA SGMAP-mapped DMA map with a linear buffer. 165 */ 166 int 167 uba_bus_dmamap_load_sgmap(bus_dma_tag_t t, bus_dmamap_t map, void *buf, 168 bus_size_t buflen, struct proc *p, int flags) 169 { 170 int error; 171 172 error = vax_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap); 173 /* 174 * XXX - Set up BDPs. 175 */ 176 177 return (error); 178 } 179 180 /* 181 * Load a UBA SGMAP-mapped DMA map with an mbuf chain. 182 */ 183 int 184 uba_bus_dmamap_load_mbuf_sgmap( bus_dma_tag_t t, bus_dmamap_t map, 185 struct mbuf *m, int flags) 186 { 187 int error; 188 189 error = vax_sgmap_load_mbuf(t, map, m, flags, t->_sgmap); 190 191 return (error); 192 } 193 194 /* 195 * Load a UBA SGMAP-mapped DMA map with a uio. 196 */ 197 int 198 uba_bus_dmamap_load_uio_sgmap(bus_dma_tag_t t, bus_dmamap_t map, 199 struct uio *uio, int flags) 200 { 201 int error; 202 203 error = vax_sgmap_load_uio(t, map, uio, flags, t->_sgmap); 204 205 return (error); 206 } 207 208 /* 209 * Load a UBA SGMAP-mapped DMA map with raw memory. 210 */ 211 int 212 uba_bus_dmamap_load_raw_sgmap(bus_dma_tag_t t, bus_dmamap_t map, 213 bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags) 214 { 215 int error; 216 217 error = vax_sgmap_load_raw(t, map, segs, nsegs, size, flags, 218 t->_sgmap); 219 220 return (error); 221 } 222 223 /* 224 * Unload a UBA DMA map. 225 */ 226 void 227 uba_bus_dmamap_unload_sgmap(bus_dma_tag_t t, bus_dmamap_t map) 228 { 229 /* 230 * Invalidate any SGMAP page table entries used by this 231 * mapping. 232 */ 233 vax_sgmap_unload(t, map, t->_sgmap); 234 235 /* 236 * Do the generic bits of the unload. 237 */ 238 _bus_dmamap_unload(t, map); 239 } 240 241 /* 242 * Sync the bus map. This is only needed if BDP's are used. 243 */ 244 void 245 uba_bus_dmamap_sync(bus_dma_tag_t tag, bus_dmamap_t dmam, bus_addr_t offset, 246 bus_size_t len, int ops) 247 { 248 /* Only BDP handling, but not yet. */ 249 } 250
Indexes created Sun Oct 19 02:09:48 GMT 2025