tc_dma_3000_500.c revision 1.2
1 /* $NetBSD: tc_dma_3000_500.c,v 1.2 1997/06/07 00:02:18 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 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 <machine/options.h> /* Config options headers */ 41 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 42 43 __KERNEL_RCSID(0, "$NetBSD: tc_dma_3000_500.c,v 1.2 1997/06/07 00:02:18 thorpej Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/malloc.h> 49 #include <vm/vm.h> 50 51 #define _ALPHA_BUS_DMA_PRIVATE 52 #include <machine/bus.h> 53 54 #include <dev/tc/tcvar.h> 55 #include <alpha/tc/tc_sgmap.h> 56 #include <alpha/tc/tc_dma_3000_500.h> 57 58 struct alpha_bus_dma_tag tc_dmat_sgmap = { 59 NULL, /* _cookie */ 60 NULL, /* _get_tag */ 61 tc_bus_dmamap_create_sgmap, 62 tc_bus_dmamap_destroy_sgmap, 63 tc_bus_dmamap_load_sgmap, 64 tc_bus_dmamap_load_mbuf_sgmap, 65 tc_bus_dmamap_load_uio_sgmap, 66 tc_bus_dmamap_load_raw_sgmap, 67 tc_bus_dmamap_unload_sgmap, 68 NULL, /* _dmamap_sync */ 69 _bus_dmamem_alloc, 70 _bus_dmamem_free, 71 _bus_dmamem_map, 72 _bus_dmamem_unmap, 73 _bus_dmamem_mmap, 74 }; 75 76 struct tc_dma_slot_info { 77 struct alpha_sgmap tdsi_sgmap; /* sgmap for slot */ 78 struct alpha_bus_dma_tag tdsi_dmat; /* dma tag for slot */ 79 }; 80 struct tc_dma_slot_info *tc_dma_slot_info; 81 82 void 83 tc_dma_init_3000_500(nslots) 84 int nslots; 85 { 86 extern struct alpha_bus_dma_tag tc_dmat_direct; 87 size_t sisize; 88 int i; 89 90 /* Allocate per-slot DMA info. */ 91 sisize = nslots * sizeof(struct tc_dma_slot_info); 92 tc_dma_slot_info = malloc(sisize, M_DEVBUF, M_NOWAIT); 93 if (tc_dma_slot_info == NULL) 94 panic("tc_dma_init: can't allocate per-slot DMA info"); 95 bzero(tc_dma_slot_info, sisize); 96 97 /* Default all slots to direct-mapped. */ 98 for (i = 0; i < nslots; i++) 99 bcopy(&tc_dmat_direct, &tc_dma_slot_info[i].tdsi_dmat, 100 sizeof(tc_dma_slot_info[i].tdsi_dmat)); 101 } 102 103 /* 104 * Return the DMA tag for the given slot. 105 */ 106 bus_dma_tag_t 107 tc_dma_get_tag_3000_500(slot) 108 int slot; 109 { 110 111 return (&tc_dma_slot_info[slot].tdsi_dmat); 112 } 113 114 /* 115 * Create a TurboChannel SGMAP-mapped DMA map. 116 */ 117 int 118 tc_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 119 flags, dmamp) 120 bus_dma_tag_t t; 121 bus_size_t size; 122 int nsegments; 123 bus_size_t maxsegsz; 124 bus_size_t boundary; 125 int flags; 126 bus_dmamap_t *dmamp; 127 { 128 struct tc_dma_slot_info *tdsi = t->_cookie; 129 struct alpha_sgmap_cookie *a; 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 a = malloc(sizeof(struct alpha_sgmap_cookie), M_DEVBUF, 141 (flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK); 142 if (a == NULL) { 143 _bus_dmamap_destroy(t, map); 144 return (ENOMEM); 145 } 146 bzero(a, sizeof(struct alpha_sgmap_cookie)); 147 map->_dm_sgcookie = a; 148 149 if (flags & BUS_DMA_ALLOCNOW) { 150 error = alpha_sgmap_alloc(map, round_page(size), 151 &tdsi->tdsi_sgmap, flags); 152 if (error) 153 tc_bus_dmamap_destroy_sgmap(t, map); 154 } 155 156 return (error); 157 } 158 159 /* 160 * Destroy a TurboChannel SGMAP-mapped DMA map. 161 */ 162 void 163 tc_bus_dmamap_destroy_sgmap(t, map) 164 bus_dma_tag_t t; 165 bus_dmamap_t map; 166 { 167 struct tc_dma_slot_info *tdsi = t->_cookie; 168 struct alpha_sgmap_cookie *a = map->_dm_sgcookie; 169 170 if (a->apdc_flags & APDC_HAS_SGMAP) 171 alpha_sgmap_free(&tdsi->tdsi_sgmap, a); 172 173 free(a, M_DEVBUF); 174 _bus_dmamap_destroy(t, map); 175 } 176 177 /* 178 * Load a TurboChannel SGMAP-mapped DMA map with a linear buffer. 179 */ 180 int 181 tc_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 182 bus_dma_tag_t t; 183 bus_dmamap_t map; 184 void *buf; 185 bus_size_t buflen; 186 struct proc *p; 187 int flags; 188 { 189 struct tc_dma_slot_info *tdsi = t->_cookie; 190 191 return (tc_sgmap_load(t, map, buf, buflen, p, flags, 192 &tdsi->tdsi_sgmap)); 193 } 194 195 /* 196 * Load a TurboChannel SGMAP-mapped DMA map with an mbuf chain. 197 */ 198 int 199 tc_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 200 bus_dma_tag_t t; 201 bus_dmamap_t map; 202 struct mbuf *m; 203 int flags; 204 { 205 struct tc_dma_slot_info *tdsi = t->_cookie; 206 207 return (tc_sgmap_load_mbuf(t, map, m, flags, &tdsi->tdsi_sgmap)); 208 } 209 210 /* 211 * Load a TurboChannel SGMAP-mapped DMA map with a uio. 212 */ 213 int 214 tc_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 215 bus_dma_tag_t t; 216 bus_dmamap_t map; 217 struct uio *uio; 218 int flags; 219 { 220 struct tc_dma_slot_info *tdsi = t->_cookie; 221 222 return (tc_sgmap_load_uio(t, map, uio, flags, &tdsi->tdsi_sgmap)); 223 } 224 225 /* 226 * Load a TurboChannel SGMAP-mapped DMA map with raw memory. 227 */ 228 int 229 tc_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 230 bus_dma_tag_t t; 231 bus_dmamap_t map; 232 bus_dma_segment_t *segs; 233 int nsegs; 234 bus_size_t size; 235 int flags; 236 { 237 struct tc_dma_slot_info *tdsi = t->_cookie; 238 239 return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags, 240 &tdsi->tdsi_sgmap)); 241 } 242 243 /* 244 * Unload a TurboChannel SGMAP-mapped DMA map. 245 */ 246 void 247 tc_bus_dmamap_unload_sgmap(t, map) 248 bus_dma_tag_t t; 249 bus_dmamap_t map; 250 { 251 struct tc_dma_slot_info *tdsi = t->_cookie; 252 253 /* 254 * Invalidate any SGMAP page table entries used by this 255 * mapping. 256 */ 257 tc_sgmap_unload(t, map, &tdsi->tdsi_sgmap); 258 259 /* 260 * Do the generic bits of the unload. 261 */ 262 _bus_dmamap_unload(t, map); 263 } 264
Indexes created Thu Oct 02 01:09:59 GMT 2025