uba_dma.c revision 1.9
1 /* $NetBSD: uba_dma.c,v 1.9 2008/03/11 05:34:02 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: uba_dma.c,v 1.9 2008/03/11 05:34:02 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/sgmap.h> 54 55 #include <dev/qbus/ubavar.h> 56 57 #include <arch/vax/uba/uba_common.h> 58 59 int uba_bus_dmamap_create_sgmap(bus_dma_tag_t, bus_size_t, int, 60 bus_size_t, bus_size_t, int, bus_dmamap_t *); 61 62 void uba_bus_dmamap_destroy_sgmap(bus_dma_tag_t, bus_dmamap_t); 63 64 int uba_bus_dmamap_load_sgmap(bus_dma_tag_t, bus_dmamap_t, void *, 65 bus_size_t, struct proc *, int); 66 67 int uba_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t, bus_dmamap_t, 68 struct mbuf *, int); 69 70 int uba_bus_dmamap_load_uio_sgmap(bus_dma_tag_t, bus_dmamap_t, 71 struct uio *, int); 72 73 int uba_bus_dmamap_load_raw_sgmap(bus_dma_tag_t, bus_dmamap_t, 74 bus_dma_segment_t *, int, bus_size_t, int); 75 76 void uba_bus_dmamap_unload_sgmap(bus_dma_tag_t, bus_dmamap_t); 77 78 void uba_bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 79 bus_size_t, int); 80 81 void 82 uba_dma_init(struct uba_vsoftc *sc) 83 { 84 bus_dma_tag_t t; 85 struct pte *pte; 86 87 /* 88 * Initialize the DMA tag used for sgmap-mapped DMA. 89 */ 90 t = &sc->uv_dmat; 91 t->_cookie = sc; 92 t->_wbase = 0; 93 t->_wsize = sc->uv_size; 94 t->_boundary = 0; 95 t->_sgmap = &sc->uv_sgmap; 96 t->_dmamap_create = uba_bus_dmamap_create_sgmap; 97 t->_dmamap_destroy = uba_bus_dmamap_destroy_sgmap; 98 t->_dmamap_load = uba_bus_dmamap_load_sgmap; 99 t->_dmamap_load_mbuf = uba_bus_dmamap_load_mbuf_sgmap; 100 t->_dmamap_load_uio = uba_bus_dmamap_load_uio_sgmap; 101 t->_dmamap_load_raw = uba_bus_dmamap_load_raw_sgmap; 102 t->_dmamap_unload = uba_bus_dmamap_unload_sgmap; 103 t->_dmamap_sync = uba_bus_dmamap_sync; 104 105 t->_dmamem_alloc = _bus_dmamem_alloc; 106 t->_dmamem_free = _bus_dmamem_free; 107 t->_dmamem_map = _bus_dmamem_map; 108 t->_dmamem_unmap = _bus_dmamem_unmap; 109 t->_dmamem_mmap = _bus_dmamem_mmap; 110 111 /* 112 * Map in Unibus map registers, if not mapped in already. 113 */ 114 if (sc->uv_uba) { 115 pte = sc->uv_uba->uba_map; 116 } else { 117 pte = (struct pte *)vax_map_physmem(sc->uv_addr, 118 vax_btoc(vax_btoc(sc->uv_size) * sizeof(struct pte))); 119 if (pte == 0) 120 panic("uba_dma_init"); 121 } 122 /* 123 * Initialize the SGMAP. 124 */ 125 vax_sgmap_init(t, &sc->uv_sgmap, "uba_sgmap", 0, sc->uv_size, pte, 0); 126 127 } 128 129 /* 130 * Create a UBA SGMAP-mapped DMA map. 131 */ 132 int 133 uba_bus_dmamap_create_sgmap(bus_dma_tag_t t, bus_size_t size, int nsegments, 134 bus_size_t maxsegsz, bus_size_t boundary, int flags, 135 bus_dmamap_t *dmamp) 136 { 137 bus_dmamap_t map; 138 int error; 139 140 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 141 boundary, flags, dmamp); 142 if (error) 143 return (error); 144 145 map = *dmamp; 146 147 if (flags & BUS_DMA_ALLOCNOW) { 148 error = vax_sgmap_alloc(map, vax_round_page(size), 149 t->_sgmap, flags); 150 if (error) 151 uba_bus_dmamap_destroy_sgmap(t, map); 152 } 153 154 return (error); 155 } 156 157 /* 158 * Destroy a UBA SGMAP-mapped DMA map. 159 */ 160 void 161 uba_bus_dmamap_destroy_sgmap(bus_dma_tag_t t, bus_dmamap_t map) 162 { 163 164 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 165 vax_sgmap_free(map, t->_sgmap); 166 167 _bus_dmamap_destroy(t, map); 168 } 169 170 /* 171 * Load a UBA SGMAP-mapped DMA map with a linear buffer. 172 */ 173 int 174 uba_bus_dmamap_load_sgmap(bus_dma_tag_t t, bus_dmamap_t map, void *buf, 175 bus_size_t buflen, struct proc *p, int flags) 176 { 177 int error; 178 179 error = vax_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap); 180 /* 181 * XXX - Set up BDPs. 182 */ 183 184 return (error); 185 } 186 187 /* 188 * Load a UBA SGMAP-mapped DMA map with an mbuf chain. 189 */ 190 int 191 uba_bus_dmamap_load_mbuf_sgmap( bus_dma_tag_t t, bus_dmamap_t map, 192 struct mbuf *m, int flags) 193 { 194 int error; 195 196 error = vax_sgmap_load_mbuf(t, map, m, flags, t->_sgmap); 197 198 return (error); 199 } 200 201 /* 202 * Load a UBA SGMAP-mapped DMA map with a uio. 203 */ 204 int 205 uba_bus_dmamap_load_uio_sgmap(bus_dma_tag_t t, bus_dmamap_t map, 206 struct uio *uio, int flags) 207 { 208 int error; 209 210 error = vax_sgmap_load_uio(t, map, uio, flags, t->_sgmap); 211 212 return (error); 213 } 214 215 /* 216 * Load a UBA SGMAP-mapped DMA map with raw memory. 217 */ 218 int 219 uba_bus_dmamap_load_raw_sgmap(bus_dma_tag_t t, bus_dmamap_t map, 220 bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags) 221 { 222 int error; 223 224 error = vax_sgmap_load_raw(t, map, segs, nsegs, size, flags, 225 t->_sgmap); 226 227 return (error); 228 } 229 230 /* 231 * Unload a UBA DMA map. 232 */ 233 void 234 uba_bus_dmamap_unload_sgmap(bus_dma_tag_t t, bus_dmamap_t map) 235 { 236 /* 237 * Invalidate any SGMAP page table entries used by this 238 * mapping. 239 */ 240 vax_sgmap_unload(t, map, t->_sgmap); 241 242 /* 243 * Do the generic bits of the unload. 244 */ 245 _bus_dmamap_unload(t, map); 246 } 247 248 /* 249 * Sync the bus map. This is only needed if BDP's are used. 250 */ 251 void 252 uba_bus_dmamap_sync(bus_dma_tag_t tag, bus_dmamap_t dmam, bus_addr_t offset, 253 bus_size_t len, int ops) 254 { 255 /* Only BDP handling, but not yet. */ 256 } 257
Indexes created Mon Sep 29 21:09:56 GMT 2025