1 /* $NetBSD: uba_dma.c,v 1.11 2010/12/14 23:38:30 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 * 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 1.11 2010/12/14 23:38:30 matt Exp $"); 35 36 #define _VAX_BUS_DMA_PRIVATE 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/bus.h> 41 #include <sys/cpu.h> 42 #include <sys/device.h> 43 #include <sys/kernel.h> 44 #include <sys/malloc.h> 45 46 #include <uvm/uvm_extern.h> 47 48 #include <machine/sgmap.h> 49 50 #include <dev/qbus/ubavar.h> 51 52 #include <arch/vax/uba/uba_common.h> 53 54 int uba_bus_dmamap_create_sgmap(bus_dma_tag_t, bus_size_t, int, 55 bus_size_t, bus_size_t, int, bus_dmamap_t *); 56 57 void uba_bus_dmamap_destroy_sgmap(bus_dma_tag_t, bus_dmamap_t); 58 59 int uba_bus_dmamap_load_sgmap(bus_dma_tag_t, bus_dmamap_t, void *, 60 bus_size_t, struct proc *, int); 61 62 int uba_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t, bus_dmamap_t, 63 struct mbuf *, int); 64 65 int uba_bus_dmamap_load_uio_sgmap(bus_dma_tag_t, bus_dmamap_t, 66 struct uio *, int); 67 68 int uba_bus_dmamap_load_raw_sgmap(bus_dma_tag_t, bus_dmamap_t, 69 bus_dma_segment_t *, int, bus_size_t, int); 70 71 void uba_bus_dmamap_unload_sgmap(bus_dma_tag_t, bus_dmamap_t); 72 73 void uba_bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 74 bus_size_t, int); 75 76 void 77 uba_dma_init(struct uba_vsoftc *sc) 78 { 79 bus_dma_tag_t t; 80 struct pte *pte; 81 82 /* 83 * Initialize the DMA tag used for sgmap-mapped DMA. 84 */ 85 t = &sc->uv_dmat; 86 t->_cookie = sc; 87 t->_wbase = 0; 88 t->_wsize = sc->uv_size; 89 t->_boundary = 0; 90 t->_sgmap = &sc->uv_sgmap; 91 t->_dmamap_create = uba_bus_dmamap_create_sgmap; 92 t->_dmamap_destroy = uba_bus_dmamap_destroy_sgmap; 93 t->_dmamap_load = uba_bus_dmamap_load_sgmap; 94 t->_dmamap_load_mbuf = uba_bus_dmamap_load_mbuf_sgmap; 95 t->_dmamap_load_uio = uba_bus_dmamap_load_uio_sgmap; 96 t->_dmamap_load_raw = uba_bus_dmamap_load_raw_sgmap; 97 t->_dmamap_unload = uba_bus_dmamap_unload_sgmap; 98 t->_dmamap_sync = uba_bus_dmamap_sync; 99 100 t->_dmamem_alloc = _bus_dmamem_alloc; 101 t->_dmamem_free = _bus_dmamem_free; 102 t->_dmamem_map = _bus_dmamem_map; 103 t->_dmamem_unmap = _bus_dmamem_unmap; 104 t->_dmamem_mmap = _bus_dmamem_mmap; 105 106 /* 107 * Map in Unibus map registers, if not mapped in already. 108 */ 109 if (sc->uv_uba) { 110 pte = sc->uv_uba->uba_map; 111 } else { 112 pte = (struct pte *)vax_map_physmem(sc->uv_addr, 113 vax_btoc(vax_btoc(sc->uv_size) * sizeof(struct pte))); 114 if (pte == 0) 115 panic("uba_dma_init"); 116 } 117 /* 118 * Initialize the SGMAP. 119 */ 120 vax_sgmap_init(t, &sc->uv_sgmap, "uba_sgmap", 0, sc->uv_size, pte, 0); 121 122 } 123 124 /* 125 * Create a UBA SGMAP-mapped DMA map. 126 */ 127 int 128 uba_bus_dmamap_create_sgmap(bus_dma_tag_t t, bus_size_t size, int nsegments, 129 bus_size_t maxsegsz, bus_size_t boundary, int flags, 130 bus_dmamap_t *dmamp) 131 { 132 bus_dmamap_t map; 133 int error; 134 135 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 136 boundary, flags, dmamp); 137 if (error) 138 return (error); 139 140 map = *dmamp; 141 142 if (flags & BUS_DMA_ALLOCNOW) { 143 error = vax_sgmap_alloc(map, vax_round_page(size), 144 t->_sgmap, flags); 145 if (error) 146 uba_bus_dmamap_destroy_sgmap(t, map); 147 } 148 149 return (error); 150 } 151 152 /* 153 * Destroy a UBA SGMAP-mapped DMA map. 154 */ 155 void 156 uba_bus_dmamap_destroy_sgmap(bus_dma_tag_t t, bus_dmamap_t map) 157 { 158 159 if (map->_dm_flags & DMAMAP_HAS_SGMAP) 160 vax_sgmap_free(map, t->_sgmap); 161 162 _bus_dmamap_destroy(t, map); 163 } 164 165 /* 166 * Load a UBA SGMAP-mapped DMA map with a linear buffer. 167 */ 168 int 169 uba_bus_dmamap_load_sgmap(bus_dma_tag_t t, bus_dmamap_t map, void *buf, 170 bus_size_t buflen, struct proc *p, int flags) 171 { 172 int error; 173 174 error = vax_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap); 175 /* 176 * XXX - Set up BDPs. 177 */ 178 179 return (error); 180 } 181 182 /* 183 * Load a UBA SGMAP-mapped DMA map with an mbuf chain. 184 */ 185 int 186 uba_bus_dmamap_load_mbuf_sgmap( bus_dma_tag_t t, bus_dmamap_t map, 187 struct mbuf *m, int flags) 188 { 189 int error; 190 191 error = vax_sgmap_load_mbuf(t, map, m, flags, t->_sgmap); 192 193 return (error); 194 } 195 196 /* 197 * Load a UBA SGMAP-mapped DMA map with a uio. 198 */ 199 int 200 uba_bus_dmamap_load_uio_sgmap(bus_dma_tag_t t, bus_dmamap_t map, 201 struct uio *uio, int flags) 202 { 203 int error; 204 205 error = vax_sgmap_load_uio(t, map, uio, flags, t->_sgmap); 206 207 return (error); 208 } 209 210 /* 211 * Load a UBA SGMAP-mapped DMA map with raw memory. 212 */ 213 int 214 uba_bus_dmamap_load_raw_sgmap(bus_dma_tag_t t, bus_dmamap_t map, 215 bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags) 216 { 217 int error; 218 219 error = vax_sgmap_load_raw(t, map, segs, nsegs, size, flags, 220 t->_sgmap); 221 222 return (error); 223 } 224 225 /* 226 * Unload a UBA DMA map. 227 */ 228 void 229 uba_bus_dmamap_unload_sgmap(bus_dma_tag_t t, bus_dmamap_t map) 230 { 231 /* 232 * Invalidate any SGMAP page table entries used by this 233 * mapping. 234 */ 235 vax_sgmap_unload(t, map, t->_sgmap); 236 237 /* 238 * Do the generic bits of the unload. 239 */ 240 _bus_dmamap_unload(t, map); 241 } 242 243 /* 244 * Sync the bus map. This is only needed if BDP's are used. 245 */ 246 void 247 uba_bus_dmamap_sync(bus_dma_tag_t tag, bus_dmamap_t dmam, bus_addr_t offset, 248 bus_size_t len, int ops) 249 { 250 /* Only BDP handling, but not yet. */ 251 } 252
Indexes created Sat Sep 20 22:09:52 GMT 2025